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   1 /*
   2  *  thinkpad_acpi.c - ThinkPad ACPI Extras
   3  *
   4  *
   5  *  Copyright (C) 2004-2005 Borislav Deianov <borislav@users.sf.net>
   6  *  Copyright (C) 2006-2008 Henrique de Moraes Holschuh <hmh@hmh.eng.br>
   7  *
   8  *  This program is free software; you can redistribute it and/or modify
   9  *  it under the terms of the GNU General Public License as published by
  10  *  the Free Software Foundation; either version 2 of the License, or
  11  *  (at your option) any later version.
  12  *
  13  *  This program is distributed in the hope that it will be useful,
  14  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  *  GNU General Public License for more details.
  17  *
  18  *  You should have received a copy of the GNU General Public License
  19  *  along with this program; if not, write to the Free Software
  20  *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  21  *  02110-1301, USA.
  22  */
  23
  24 #define TPACPI_VERSION "0.22"
  25 #define TPACPI_SYSFS_VERSION 0x020200
  26
  27 /*
  28  *  Changelog:
  29  *  2007-10-20          changelog trimmed down
  30  *
  31  *  2007-03-27  0.14    renamed to thinkpad_acpi and moved to
  32  *                      drivers/misc.
  33  *
  34  *  2006-11-22  0.13    new maintainer
  35  *                      changelog now lives in git commit history, and will
  36  *                      not be updated further in-file.
  37  *
  38  *  2005-03-17  0.11    support for 600e, 770x
  39  *                          thanks to Jamie Lentin <lentinj@dial.pipex.com>
  40  *
  41  *  2005-01-16  0.9     use MODULE_VERSION
  42  *                          thanks to Henrik Brix Andersen <brix@gentoo.org>
  43  *                      fix parameter passing on module loading
  44  *                          thanks to Rusty Russell <rusty@rustcorp.com.au>
  45  *                          thanks to Jim Radford <radford@blackbean.org>
  46  *  2004-11-08  0.8     fix init error case, don't return from a macro
  47  *                          thanks to Chris Wright <chrisw@osdl.org>
  48  */
  49
  50 #include <linux/kernel.h>
  51 #include <linux/module.h>
  52 #include <linux/init.h>
  53 #include <linux/types.h>
  54 #include <linux/string.h>
  55 #include <linux/list.h>
  56 #include <linux/mutex.h>
  57 #include <linux/kthread.h>
  58 #include <linux/freezer.h>
  59 #include <linux/delay.h>
  60
  61 #include <linux/nvram.h>
  62 #include <linux/proc_fs.h>
  63 #include <linux/sysfs.h>
  64 #include <linux/backlight.h>
  65 #include <linux/fb.h>
  66 #include <linux/platform_device.h>
  67 #include <linux/hwmon.h>
  68 #include <linux/hwmon-sysfs.h>
  69 #include <linux/input.h>
  70 #include <linux/leds.h>
  71 #include <linux/rfkill.h>
  72 #include <asm/uaccess.h>
  73
  74 #include <linux/dmi.h>
  75 #include <linux/jiffies.h>
  76 #include <linux/workqueue.h>
  77
  78 #include <acpi/acpi_drivers.h>
  79
  80 #include <linux/pci_ids.h>
  81
  82
  83 /* ThinkPad CMOS commands */
  84 #define TP_CMOS_VOLUME_DOWN     0
  85 #define TP_CMOS_VOLUME_UP       1
  86 #define TP_CMOS_VOLUME_MUTE     2
  87 #define TP_CMOS_BRIGHTNESS_UP   4
  88 #define TP_CMOS_BRIGHTNESS_DOWN 5
  89 #define TP_CMOS_THINKLIGHT_ON   12
  90 #define TP_CMOS_THINKLIGHT_OFF  13
  91
  92 /* NVRAM Addresses */
  93 enum tp_nvram_addr {
  94         TP_NVRAM_ADDR_HK2               = 0x57,
  95         TP_NVRAM_ADDR_THINKLIGHT        = 0x58,
  96         TP_NVRAM_ADDR_VIDEO             = 0x59,
  97         TP_NVRAM_ADDR_BRIGHTNESS        = 0x5e,
  98         TP_NVRAM_ADDR_MIXER             = 0x60,
  99 };
 100
 101 /* NVRAM bit masks */
 102 enum {
 103         TP_NVRAM_MASK_HKT_THINKPAD      = 0x08,
 104         TP_NVRAM_MASK_HKT_ZOOM          = 0x20,
 105         TP_NVRAM_MASK_HKT_DISPLAY       = 0x40,
 106         TP_NVRAM_MASK_HKT_HIBERNATE     = 0x80,
 107         TP_NVRAM_MASK_THINKLIGHT        = 0x10,
 108         TP_NVRAM_MASK_HKT_DISPEXPND     = 0x30,
 109         TP_NVRAM_MASK_HKT_BRIGHTNESS    = 0x20,
 110         TP_NVRAM_MASK_LEVEL_BRIGHTNESS  = 0x0f,
 111         TP_NVRAM_POS_LEVEL_BRIGHTNESS   = 0,
 112         TP_NVRAM_MASK_MUTE              = 0x40,
 113         TP_NVRAM_MASK_HKT_VOLUME        = 0x80,
 114         TP_NVRAM_MASK_LEVEL_VOLUME      = 0x0f,
 115         TP_NVRAM_POS_LEVEL_VOLUME       = 0,
 116 };
 117
 118 /* ACPI HIDs */
 119 #define TPACPI_ACPI_HKEY_HID            "IBM0068"
 120
 121 /* Input IDs */
 122 #define TPACPI_HKEY_INPUT_PRODUCT       0x5054 /* "TP" */
 123 #define TPACPI_HKEY_INPUT_VERSION       0x4101
 124
 125 /* ACPI \WGSV commands */
 126 enum {
 127         TP_ACPI_WGSV_GET_STATE          = 0x01, /* Get state information */
 128         TP_ACPI_WGSV_PWR_ON_ON_RESUME   = 0x02, /* Resume WWAN powered on */
 129         TP_ACPI_WGSV_PWR_OFF_ON_RESUME  = 0x03, /* Resume WWAN powered off */
 130         TP_ACPI_WGSV_SAVE_STATE         = 0x04, /* Save state for S4/S5 */
 131 };
 132
 133 /* TP_ACPI_WGSV_GET_STATE bits */
 134 enum {
 135         TP_ACPI_WGSV_STATE_WWANEXIST    = 0x0001, /* WWAN hw available */
 136         TP_ACPI_WGSV_STATE_WWANPWR      = 0x0002, /* WWAN radio enabled */
 137         TP_ACPI_WGSV_STATE_WWANPWRRES   = 0x0004, /* WWAN state at resume */
 138         TP_ACPI_WGSV_STATE_WWANBIOSOFF  = 0x0008, /* WWAN disabled in BIOS */
 139         TP_ACPI_WGSV_STATE_BLTHEXIST    = 0x0001, /* BLTH hw available */
 140         TP_ACPI_WGSV_STATE_BLTHPWR      = 0x0002, /* BLTH radio enabled */
 141         TP_ACPI_WGSV_STATE_BLTHPWRRES   = 0x0004, /* BLTH state at resume */
 142         TP_ACPI_WGSV_STATE_BLTHBIOSOFF  = 0x0008, /* BLTH disabled in BIOS */
 143         TP_ACPI_WGSV_STATE_UWBEXIST     = 0x0010, /* UWB hw available */
 144         TP_ACPI_WGSV_STATE_UWBPWR       = 0x0020, /* UWB radio enabled */
 145 };
 146
 147 /****************************************************************************
 148  * Main driver
 149  */
 150
 151 #define TPACPI_NAME "thinkpad"
 152 #define TPACPI_DESC "ThinkPad ACPI Extras"
 153 #define TPACPI_FILE TPACPI_NAME "_acpi"
 154 #define TPACPI_URL "http://ibm-acpi.sf.net/"
 155 #define TPACPI_MAIL "ibm-acpi-devel@lists.sourceforge.net"
 156
 157 #define TPACPI_PROC_DIR "ibm"
 158 #define TPACPI_ACPI_EVENT_PREFIX "ibm"
 159 #define TPACPI_DRVR_NAME TPACPI_FILE
 160 #define TPACPI_DRVR_SHORTNAME "tpacpi"
 161 #define TPACPI_HWMON_DRVR_NAME TPACPI_NAME "_hwmon"
 162
 163 #define TPACPI_NVRAM_KTHREAD_NAME "ktpacpi_nvramd"
 164 #define TPACPI_WORKQUEUE_NAME "ktpacpid"
 165
 166 #define TPACPI_MAX_ACPI_ARGS 3
 167
 168 /* rfkill switches */
 169 enum {
 170         TPACPI_RFK_BLUETOOTH_SW_ID = 0,
 171         TPACPI_RFK_WWAN_SW_ID,
 172         TPACPI_RFK_UWB_SW_ID,
 173 };
 174
 175 /* Debugging */
 176 #define TPACPI_LOG TPACPI_FILE ": "
 177 #define TPACPI_ALERT    KERN_ALERT  TPACPI_LOG
 178 #define TPACPI_CRIT     KERN_CRIT   TPACPI_LOG
 179 #define TPACPI_ERR      KERN_ERR    TPACPI_LOG
 180 #define TPACPI_NOTICE   KERN_NOTICE TPACPI_LOG
 181 #define TPACPI_INFO     KERN_INFO   TPACPI_LOG
 182 #define TPACPI_DEBUG    KERN_DEBUG  TPACPI_LOG
 183
 184 #define TPACPI_DBG_ALL          0xffff
 185 #define TPACPI_DBG_INIT         0x0001
 186 #define TPACPI_DBG_EXIT         0x0002
 187 #define dbg_printk(a_dbg_level, format, arg...) \
 188         do { if (dbg_level & a_dbg_level) \
 189                 printk(TPACPI_DEBUG "%s: " format, __func__ , ## arg); \
 190         } while (0)
 191 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
 192 #define vdbg_printk(a_dbg_level, format, arg...) \
 193         dbg_printk(a_dbg_level, format, ## arg)
 194 static const char *str_supported(int is_supported);
 195 #else
 196 #define vdbg_printk(a_dbg_level, format, arg...)
 197 #endif
 198
 199 #define onoff(status, bit) ((status) & (1 << (bit)) ? "on" : "off")
 200 #define enabled(status, bit) ((status) & (1 << (bit)) ? "enabled" : "disabled")
 201 #define strlencmp(a, b) (strncmp((a), (b), strlen(b)))
 202
 203
 204 /****************************************************************************
 205  * Driver-wide structs and misc. variables
 206  */
 207
 208 struct ibm_struct;
 209
 210 struct tp_acpi_drv_struct {
 211         const struct acpi_device_id *hid;
 212         struct acpi_driver *driver;
 213
 214         void (*notify) (struct ibm_struct *, u32);
 215         acpi_handle *handle;
 216         u32 type;
 217         struct acpi_device *device;
 218 };
 219
 220 struct ibm_struct {
 221         char *name;
 222
 223         int (*read) (char *);
 224         int (*write) (char *);
 225         void (*exit) (void);
 226         void (*resume) (void);
 227         void (*suspend) (pm_message_t state);
 228         void (*shutdown) (void);
 229
 230         struct list_head all_drivers;
 231
 232         struct tp_acpi_drv_struct *acpi;
 233
 234         struct {
 235                 u8 acpi_driver_registered:1;
 236                 u8 acpi_notify_installed:1;
 237                 u8 proc_created:1;
 238                 u8 init_called:1;
 239                 u8 experimental:1;
 240         } flags;
 241 };
 242
 243 struct ibm_init_struct {
 244         char param[32];
 245
 246         int (*init) (struct ibm_init_struct *);
 247         struct ibm_struct *data;
 248 };
 249
 250 static struct {
 251 #ifdef CONFIG_THINKPAD_ACPI_BAY
 252         u32 bay_status:1;
 253         u32 bay_eject:1;
 254         u32 bay_status2:1;
 255         u32 bay_eject2:1;
 256 #endif
 257         u32 bluetooth:1;
 258         u32 hotkey:1;
 259         u32 hotkey_mask:1;
 260         u32 hotkey_wlsw:1;
 261         u32 hotkey_tablet:1;
 262         u32 light:1;
 263         u32 light_status:1;
 264         u32 bright_16levels:1;
 265         u32 bright_acpimode:1;
 266         u32 wan:1;
 267         u32 uwb:1;
 268         u32 fan_ctrl_status_undef:1;
 269         u32 input_device_registered:1;
 270         u32 platform_drv_registered:1;
 271         u32 platform_drv_attrs_registered:1;
 272         u32 sensors_pdrv_registered:1;
 273         u32 sensors_pdrv_attrs_registered:1;
 274         u32 sensors_pdev_attrs_registered:1;
 275         u32 hotkey_poll_active:1;
 276 } tp_features;
 277
 278 static struct {
 279         u16 hotkey_mask_ff:1;
 280         u16 bright_cmos_ec_unsync:1;
 281 } tp_warned;
 282
 283 struct thinkpad_id_data {
 284         unsigned int vendor;    /* ThinkPad vendor:
 285                                  * PCI_VENDOR_ID_IBM/PCI_VENDOR_ID_LENOVO */
 286
 287         char *bios_version_str; /* Something like 1ZET51WW (1.03z) */
 288         char *ec_version_str;   /* Something like 1ZHT51WW-1.04a */
 289
 290         u16 bios_model;         /* Big Endian, TP-1Y = 0x5931, 0 = unknown */
 291         u16 ec_model;
 292
 293         char *model_str;        /* ThinkPad T43 */
 294         char *nummodel_str;     /* 9384A9C for a 9384-A9C model */
 295 };
 296 static struct thinkpad_id_data thinkpad_id;
 297
 298 static enum {
 299         TPACPI_LIFE_INIT = 0,
 300         TPACPI_LIFE_RUNNING,
 301         TPACPI_LIFE_EXITING,
 302 } tpacpi_lifecycle;
 303
 304 static int experimental;
 305 static u32 dbg_level;
 306
 307 static struct workqueue_struct *tpacpi_wq;
 308
 309 /* Special LED class that can defer work */
 310 struct tpacpi_led_classdev {
 311         struct led_classdev led_classdev;
 312         struct work_struct work;
 313         enum led_brightness new_brightness;
 314         unsigned int led;
 315 };
 316
 317 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
 318 static int dbg_wlswemul;
 319 static int tpacpi_wlsw_emulstate;
 320 static int dbg_bluetoothemul;
 321 static int tpacpi_bluetooth_emulstate;
 322 static int dbg_wwanemul;
 323 static int tpacpi_wwan_emulstate;
 324 static int dbg_uwbemul;
 325 static int tpacpi_uwb_emulstate;
 326 #endif
 327
 328
 329 /****************************************************************************
 330  ****************************************************************************
 331  *
 332  * ACPI Helpers and device model
 333  *
 334  ****************************************************************************
 335  ****************************************************************************/
 336
 337 /*************************************************************************
 338  * ACPI basic handles
 339  */
 340
 341 static acpi_handle root_handle;
 342
 343 #define TPACPI_HANDLE(object, parent, paths...)                 \
 344         static acpi_handle  object##_handle;                    \
 345         static acpi_handle *object##_parent = &parent##_handle; \
 346         static char        *object##_path;                      \
 347         static char        *object##_paths[] = { paths }
 348
 349 TPACPI_HANDLE(ec, root, "\\_SB.PCI0.ISA.EC0",   /* 240, 240x */
 350            "\\_SB.PCI.ISA.EC",  /* 570 */
 351            "\\_SB.PCI0.ISA0.EC0",       /* 600e/x, 770e, 770x */
 352            "\\_SB.PCI0.ISA.EC", /* A21e, A2xm/p, T20-22, X20-21 */
 353            "\\_SB.PCI0.AD4S.EC0",       /* i1400, R30 */
 354            "\\_SB.PCI0.ICH3.EC0",       /* R31 */
 355            "\\_SB.PCI0.LPC.EC", /* all others */
 356            );
 357
 358 TPACPI_HANDLE(ecrd, ec, "ECRD");        /* 570 */
 359 TPACPI_HANDLE(ecwr, ec, "ECWR");        /* 570 */
 360
 361 TPACPI_HANDLE(cmos, root, "\\UCMS",     /* R50, R50e, R50p, R51, */
 362                                         /* T4x, X31, X40 */
 363            "\\CMOS",            /* A3x, G4x, R32, T23, T30, X22-24, X30 */
 364            "\\CMS",             /* R40, R40e */
 365            );                   /* all others */
 366
 367 TPACPI_HANDLE(hkey, ec, "\\_SB.HKEY",   /* 600e/x, 770e, 770x */
 368            "^HKEY",             /* R30, R31 */
 369            "HKEY",              /* all others */
 370            );                   /* 570 */
 371
 372 TPACPI_HANDLE(vid, root, "\\_SB.PCI.AGP.VGA",   /* 570 */
 373            "\\_SB.PCI0.AGP0.VID0",      /* 600e/x, 770x */
 374            "\\_SB.PCI0.VID0",   /* 770e */
 375            "\\_SB.PCI0.VID",    /* A21e, G4x, R50e, X30, X40 */
 376            "\\_SB.PCI0.AGP.VID",        /* all others */
 377            );                           /* R30, R31 */
 378
 379
 380 /*************************************************************************
 381  * ACPI helpers
 382  */
 383
 384 static int acpi_evalf(acpi_handle handle,
 385                       void *res, char *method, char *fmt, ...)
 386 {
 387         char *fmt0 = fmt;
 388         struct acpi_object_list params;
 389         union acpi_object in_objs[TPACPI_MAX_ACPI_ARGS];
 390         struct acpi_buffer result, *resultp;
 391         union acpi_object out_obj;
 392         acpi_status status;
 393         va_list ap;
 394         char res_type;
 395         int success;
 396         int quiet;
 397
 398         if (!*fmt) {
 399                 printk(TPACPI_ERR "acpi_evalf() called with empty format\n");
 400                 return 0;
 401         }
 402
 403         if (*fmt == 'q') {
 404                 quiet = 1;
 405                 fmt++;
 406         } else
 407                 quiet = 0;
 408
 409         res_type = *(fmt++);
 410
 411         params.count = 0;
 412         params.pointer = &in_objs[0];
 413
 414         va_start(ap, fmt);
 415         while (*fmt) {
 416                 char c = *(fmt++);
 417                 switch (c) {
 418                 case 'd':       /* int */
 419                         in_objs[params.count].integer.value = va_arg(ap, int);
 420                         in_objs[params.count++].type = ACPI_TYPE_INTEGER;
 421                         break;
 422                         /* add more types as needed */
 423                 default:
 424                         printk(TPACPI_ERR "acpi_evalf() called "
 425                                "with invalid format character '%c'\n", c);
 426                         return 0;
 427                 }
 428         }
 429         va_end(ap);
 430
 431         if (res_type != 'v') {
 432                 result.length = sizeof(out_obj);
 433                 result.pointer = &out_obj;
 434                 resultp = &result;
 435         } else
 436                 resultp = NULL;
 437
 438         status = acpi_evaluate_object(handle, method, &params, resultp);
 439
 440         switch (res_type) {
 441         case 'd':               /* int */
 442                 if (res)
 443                         *(int *)res = out_obj.integer.value;
 444                 success = status == AE_OK && out_obj.type == ACPI_TYPE_INTEGER;
 445                 break;
 446         case 'v':               /* void */
 447                 success = status == AE_OK;
 448                 break;
 449                 /* add more types as needed */
 450         default:
 451                 printk(TPACPI_ERR "acpi_evalf() called "
 452                        "with invalid format character '%c'\n", res_type);
 453                 return 0;
 454         }
 455
 456         if (!success && !quiet)
 457                 printk(TPACPI_ERR "acpi_evalf(%s, %s, ...) failed: %d\n",
 458                        method, fmt0, status);
 459
 460         return success;
 461 }
 462
 463 static int acpi_ec_read(int i, u8 *p)
 464 {
 465         int v;
 466
 467         if (ecrd_handle) {
 468                 if (!acpi_evalf(ecrd_handle, &v, NULL, "dd", i))
 469                         return 0;
 470                 *p = v;
 471         } else {
 472                 if (ec_read(i, p) < 0)
 473                         return 0;
 474         }
 475
 476         return 1;
 477 }
 478
 479 static int acpi_ec_write(int i, u8 v)
 480 {
 481         if (ecwr_handle) {
 482                 if (!acpi_evalf(ecwr_handle, NULL, NULL, "vdd", i, v))
 483                         return 0;
 484         } else {
 485                 if (ec_write(i, v) < 0)
 486                         return 0;
 487         }
 488
 489         return 1;
 490 }
 491
 492 #if defined(CONFIG_THINKPAD_ACPI_DOCK) || defined(CONFIG_THINKPAD_ACPI_BAY)
 493 static int _sta(acpi_handle handle)
 494 {
 495         int status;
 496
 497         if (!handle || !acpi_evalf(handle, &status, "_STA", "d"))
 498                 status = 0;
 499
 500         return status;
 501 }
 502 #endif
 503
 504 static int issue_thinkpad_cmos_command(int cmos_cmd)
 505 {
 506         if (!cmos_handle)
 507                 return -ENXIO;
 508
 509         if (!acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd))
 510                 return -EIO;
 511
 512         return 0;
 513 }
 514
 515 /*************************************************************************
 516  * ACPI device model
 517  */
 518
 519 #define TPACPI_ACPIHANDLE_INIT(object) \
 520         drv_acpi_handle_init(#object, &object##_handle, *object##_parent, \
 521                 object##_paths, ARRAY_SIZE(object##_paths), &object##_path)
 522
 523 static void drv_acpi_handle_init(char *name,
 524                            acpi_handle *handle, acpi_handle parent,
 525                            char **paths, int num_paths, char **path)
 526 {
 527         int i;
 528         acpi_status status;
 529
 530         vdbg_printk(TPACPI_DBG_INIT, "trying to locate ACPI handle for %s\n",
 531                 name);
 532
 533         for (i = 0; i < num_paths; i++) {
 534                 status = acpi_get_handle(parent, paths[i], handle);
 535                 if (ACPI_SUCCESS(status)) {
 536                         *path = paths[i];
 537                         dbg_printk(TPACPI_DBG_INIT,
 538                                    "Found ACPI handle %s for %s\n",
 539                                    *path, name);
 540                         return;
 541                 }
 542         }
 543
 544         vdbg_printk(TPACPI_DBG_INIT, "ACPI handle for %s not found\n",
 545                     name);
 546         *handle = NULL;
 547 }
 548
 549 static void dispatch_acpi_notify(acpi_handle handle, u32 event, void *data)
 550 {
 551         struct ibm_struct *ibm = data;
 552
 553         if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
 554                 return;
 555
 556         if (!ibm || !ibm->acpi || !ibm->acpi->notify)
 557                 return;
 558
 559         ibm->acpi->notify(ibm, event);
 560 }
 561
 562 static int __init setup_acpi_notify(struct ibm_struct *ibm)
 563 {
 564         acpi_status status;
 565         int rc;
 566
 567         BUG_ON(!ibm->acpi);
 568
 569         if (!*ibm->acpi->handle)
 570                 return 0;
 571
 572         vdbg_printk(TPACPI_DBG_INIT,
 573                 "setting up ACPI notify for %s\n", ibm->name);
 574
 575         rc = acpi_bus_get_device(*ibm->acpi->handle, &ibm->acpi->device);
 576         if (rc < 0) {
 577                 printk(TPACPI_ERR "acpi_bus_get_device(%s) failed: %d\n",
 578                         ibm->name, rc);
 579                 return -ENODEV;
 580         }
 581
 582         ibm->acpi->device->driver_data = ibm;
 583         sprintf(acpi_device_class(ibm->acpi->device), "%s/%s",
 584                 TPACPI_ACPI_EVENT_PREFIX,
 585                 ibm->name);
 586
 587         status = acpi_install_notify_handler(*ibm->acpi->handle,
 588                         ibm->acpi->type, dispatch_acpi_notify, ibm);
 589         if (ACPI_FAILURE(status)) {
 590                 if (status == AE_ALREADY_EXISTS) {
 591                         printk(TPACPI_NOTICE
 592                                "another device driver is already "
 593                                "handling %s events\n", ibm->name);
 594                 } else {
 595                         printk(TPACPI_ERR
 596                                "acpi_install_notify_handler(%s) failed: %d\n",
 597                                ibm->name, status);
 598                 }
 599                 return -ENODEV;
 600         }
 601         ibm->flags.acpi_notify_installed = 1;
 602         return 0;
 603 }
 604
 605 static int __init tpacpi_device_add(struct acpi_device *device)
 606 {
 607         return 0;
 608 }
 609
 610 static int __init register_tpacpi_subdriver(struct ibm_struct *ibm)
 611 {
 612         int rc;
 613
 614         dbg_printk(TPACPI_DBG_INIT,
 615                 "registering %s as an ACPI driver\n", ibm->name);
 616
 617         BUG_ON(!ibm->acpi);
 618
 619         ibm->acpi->driver = kzalloc(sizeof(struct acpi_driver), GFP_KERNEL);
 620         if (!ibm->acpi->driver) {
 621                 printk(TPACPI_ERR
 622                        "failed to allocate memory for ibm->acpi->driver\n");
 623                 return -ENOMEM;
 624         }
 625
 626         sprintf(ibm->acpi->driver->name, "%s_%s", TPACPI_NAME, ibm->name);
 627         ibm->acpi->driver->ids = ibm->acpi->hid;
 628
 629         ibm->acpi->driver->ops.add = &tpacpi_device_add;
 630
 631         rc = acpi_bus_register_driver(ibm->acpi->driver);
 632         if (rc < 0) {
 633                 printk(TPACPI_ERR "acpi_bus_register_driver(%s) failed: %d\n",
 634                        ibm->name, rc);
 635                 kfree(ibm->acpi->driver);
 636                 ibm->acpi->driver = NULL;
 637         } else if (!rc)
 638                 ibm->flags.acpi_driver_registered = 1;
 639
 640         return rc;
 641 }
 642
 643
 644 /****************************************************************************
 645  ****************************************************************************
 646  *
 647  * Procfs Helpers
 648  *
 649  ****************************************************************************
 650  ****************************************************************************/
 651
 652 static int dispatch_procfs_read(char *page, char **start, off_t off,
 653                         int count, int *eof, void *data)
 654 {
 655         struct ibm_struct *ibm = data;
 656         int len;
 657
 658         if (!ibm || !ibm->read)
 659                 return -EINVAL;
 660
 661         len = ibm->read(page);
 662         if (len < 0)
 663                 return len;
 664
 665         if (len <= off + count)
 666                 *eof = 1;
 667         *start = page + off;
 668         len -= off;
 669         if (len > count)
 670                 len = count;
 671         if (len < 0)
 672                 len = 0;
 673
 674         return len;
 675 }
 676
 677 static int dispatch_procfs_write(struct file *file,
 678                         const char __user *userbuf,
 679                         unsigned long count, void *data)
 680 {
 681         struct ibm_struct *ibm = data;
 682         char *kernbuf;
 683         int ret;
 684
 685         if (!ibm || !ibm->write)
 686                 return -EINVAL;
 687
 688         kernbuf = kmalloc(count + 2, GFP_KERNEL);
 689         if (!kernbuf)
 690                 return -ENOMEM;
 691
 692         if (copy_from_user(kernbuf, userbuf, count)) {
 693                 kfree(kernbuf);
 694                 return -EFAULT;
 695         }
 696
 697         kernbuf[count] = 0;
 698         strcat(kernbuf, ",");
 699         ret = ibm->write(kernbuf);
 700         if (ret == 0)
 701                 ret = count;
 702
 703         kfree(kernbuf);
 704
 705         return ret;
 706 }
 707
 708 static char *next_cmd(char **cmds)
 709 {
 710         char *start = *cmds;
 711         char *end;
 712
 713         while ((end = strchr(start, ',')) && end == start)
 714                 start = end + 1;
 715
 716         if (!end)
 717                 return NULL;
 718
 719         *end = 0;
 720         *cmds = end + 1;
 721         return start;
 722 }
 723
 724
 725 /****************************************************************************
 726  ****************************************************************************
 727  *
 728  * Device model: input, hwmon and platform
 729  *
 730  ****************************************************************************
 731  ****************************************************************************/
 732
 733 static struct platform_device *tpacpi_pdev;
 734 static struct platform_device *tpacpi_sensors_pdev;
 735 static struct device *tpacpi_hwmon;
 736 static struct input_dev *tpacpi_inputdev;
 737 static struct mutex tpacpi_inputdev_send_mutex;
 738 static LIST_HEAD(tpacpi_all_drivers);
 739
 740 static int tpacpi_suspend_handler(struct platform_device *pdev,
 741                                   pm_message_t state)
 742 {
 743         struct ibm_struct *ibm, *itmp;
 744
 745         list_for_each_entry_safe(ibm, itmp,
 746                                  &tpacpi_all_drivers,
 747                                  all_drivers) {
 748                 if (ibm->suspend)
 749                         (ibm->suspend)(state);
 750         }
 751
 752         return 0;
 753 }
 754
 755 static int tpacpi_resume_handler(struct platform_device *pdev)
 756 {
 757         struct ibm_struct *ibm, *itmp;
 758
 759         list_for_each_entry_safe(ibm, itmp,
 760                                  &tpacpi_all_drivers,
 761                                  all_drivers) {
 762                 if (ibm->resume)
 763                         (ibm->resume)();
 764         }
 765
 766         return 0;
 767 }
 768
 769 static void tpacpi_shutdown_handler(struct platform_device *pdev)
 770 {
 771         struct ibm_struct *ibm, *itmp;
 772
 773         list_for_each_entry_safe(ibm, itmp,
 774                                  &tpacpi_all_drivers,
 775                                  all_drivers) {
 776                 if (ibm->shutdown)
 777                         (ibm->shutdown)();
 778         }
 779 }
 780
 781 static struct platform_driver tpacpi_pdriver = {
 782         .driver = {
 783                 .name = TPACPI_DRVR_NAME,
 784                 .owner = THIS_MODULE,
 785         },
 786         .suspend = tpacpi_suspend_handler,
 787         .resume = tpacpi_resume_handler,
 788         .shutdown = tpacpi_shutdown_handler,
 789 };
 790
 791 static struct platform_driver tpacpi_hwmon_pdriver = {
 792         .driver = {
 793                 .name = TPACPI_HWMON_DRVR_NAME,
 794                 .owner = THIS_MODULE,
 795         },
 796 };
 797
 798 /*************************************************************************
 799  * sysfs support helpers
 800  */
 801
 802 struct attribute_set {
 803         unsigned int members, max_members;
 804         struct attribute_group group;
 805 };
 806
 807 struct attribute_set_obj {
 808         struct attribute_set s;
 809         struct attribute *a;
 810 } __attribute__((packed));
 811
 812 static struct attribute_set *create_attr_set(unsigned int max_members,
 813                                                 const char *name)
 814 {
 815         struct attribute_set_obj *sobj;
 816
 817         if (max_members == 0)
 818                 return NULL;
 819
 820         /* Allocates space for implicit NULL at the end too */
 821         sobj = kzalloc(sizeof(struct attribute_set_obj) +
 822                     max_members * sizeof(struct attribute *),
 823                     GFP_KERNEL);
 824         if (!sobj)
 825                 return NULL;
 826         sobj->s.max_members = max_members;
 827         sobj->s.group.attrs = &sobj->a;
 828         sobj->s.group.name = name;
 829
 830         return &sobj->s;
 831 }
 832
 833 #define destroy_attr_set(_set) \
 834         kfree(_set);
 835
 836 /* not multi-threaded safe, use it in a single thread per set */
 837 static int add_to_attr_set(struct attribute_set *s, struct attribute *attr)
 838 {
 839         if (!s || !attr)
 840                 return -EINVAL;
 841
 842         if (s->members >= s->max_members)
 843                 return -ENOMEM;
 844
 845         s->group.attrs[s->members] = attr;
 846         s->members++;
 847
 848         return 0;
 849 }
 850
 851 static int add_many_to_attr_set(struct attribute_set *s,
 852                         struct attribute **attr,
 853                         unsigned int count)
 854 {
 855         int i, res;
 856
 857         for (i = 0; i < count; i++) {
 858                 res = add_to_attr_set(s, attr[i]);
 859                 if (res)
 860                         return res;
 861         }
 862
 863         return 0;
 864 }
 865
 866 static void delete_attr_set(struct attribute_set *s, struct kobject *kobj)
 867 {
 868         sysfs_remove_group(kobj, &s->group);
 869         destroy_attr_set(s);
 870 }
 871
 872 #define register_attr_set_with_sysfs(_attr_set, _kobj) \
 873         sysfs_create_group(_kobj, &_attr_set->group)
 874
 875 static int parse_strtoul(const char *buf,
 876                 unsigned long max, unsigned long *value)
 877 {
 878         char *endp;
 879
 880         while (*buf && isspace(*buf))
 881                 buf++;
 882         *value = simple_strtoul(buf, &endp, 0);
 883         while (*endp && isspace(*endp))
 884                 endp++;
 885         if (*endp || *value > max)
 886                 return -EINVAL;
 887
 888         return 0;
 889 }
 890
 891 static void tpacpi_disable_brightness_delay(void)
 892 {
 893         if (acpi_evalf(hkey_handle, NULL, "PWMS", "qvd", 0))
 894                 printk(TPACPI_NOTICE
 895                         "ACPI backlight control delay disabled\n");
 896 }
 897
 898 static int __init tpacpi_query_bcl_levels(acpi_handle handle)
 899 {
 900         struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
 901         union acpi_object *obj;
 902         int rc;
 903
 904         if (ACPI_SUCCESS(acpi_evaluate_object(handle, NULL, NULL, &buffer))) {
 905                 obj = (union acpi_object *)buffer.pointer;
 906                 if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) {
 907                         printk(TPACPI_ERR "Unknown _BCL data, "
 908                                "please report this to %s\n", TPACPI_MAIL);
 909                         rc = 0;
 910                 } else {
 911                         rc = obj->package.count;
 912                 }
 913         } else {
 914                 return 0;
 915         }
 916
 917         kfree(buffer.pointer);
 918         return rc;
 919 }
 920
 921 static acpi_status __init tpacpi_acpi_walk_find_bcl(acpi_handle handle,
 922                                         u32 lvl, void *context, void **rv)
 923 {
 924         char name[ACPI_PATH_SEGMENT_LENGTH];
 925         struct acpi_buffer buffer = { sizeof(name), &name };
 926
 927         if (ACPI_SUCCESS(acpi_get_name(handle, ACPI_SINGLE_NAME, &buffer)) &&
 928             !strncmp("_BCL", name, sizeof(name) - 1)) {
 929                 BUG_ON(!rv || !*rv);
 930                 **(int **)rv = tpacpi_query_bcl_levels(handle);
 931                 return AE_CTRL_TERMINATE;
 932         } else {
 933                 return AE_OK;
 934         }
 935 }
 936
 937 /*
 938  * Returns 0 (no ACPI _BCL or _BCL invalid), or size of brightness map
 939  */
 940 static int __init tpacpi_check_std_acpi_brightness_support(void)
 941 {
 942         int status;
 943         int bcl_levels = 0;
 944         void *bcl_ptr = &bcl_levels;
 945
 946         if (!vid_handle) {
 947                 TPACPI_ACPIHANDLE_INIT(vid);
 948         }
 949         if (!vid_handle)
 950                 return 0;
 951
 952         /*
 953          * Search for a _BCL method, and execute it.  This is safe on all
 954          * ThinkPads, and as a side-effect, _BCL will place a Lenovo Vista
 955          * BIOS in ACPI backlight control mode.  We do NOT have to care
 956          * about calling the _BCL method in an enabled video device, any
 957          * will do for our purposes.
 958          */
 959
 960         status = acpi_walk_namespace(ACPI_TYPE_METHOD, vid_handle, 3,
 961                                      tpacpi_acpi_walk_find_bcl, NULL,
 962                                      &bcl_ptr);
 963
 964         if (ACPI_SUCCESS(status) && bcl_levels > 2) {
 965                 tp_features.bright_acpimode = 1;
 966                 return (bcl_levels - 2);
 967         }
 968
 969         return 0;
 970 }
 971
 972 static int __init tpacpi_new_rfkill(const unsigned int id,
 973                         struct rfkill **rfk,
 974                         const enum rfkill_type rfktype,
 975                         const char *name,
 976                         const bool set_default,
 977                         int (*toggle_radio)(void *, enum rfkill_state),
 978                         int (*get_state)(void *, enum rfkill_state *))
 979 {
 980         int res;
 981         enum rfkill_state initial_state = RFKILL_STATE_SOFT_BLOCKED;
 982
 983         res = get_state(NULL, &initial_state);
 984         if (res < 0) {
 985                 printk(TPACPI_ERR
 986                         "failed to read initial state for %s, error %d; "
 987                         "will turn radio off\n", name, res);
 988         } else if (set_default) {
 989                 /* try to set the initial state as the default for the rfkill
 990                  * type, since we ask the firmware to preserve it across S5 in
 991                  * NVRAM */
 992                 rfkill_set_default(rfktype,
 993                                 (initial_state == RFKILL_STATE_UNBLOCKED) ?
 994                                         RFKILL_STATE_UNBLOCKED :
 995                                         RFKILL_STATE_SOFT_BLOCKED);
 996         }
 997
 998         *rfk = rfkill_allocate(&tpacpi_pdev->dev, rfktype);
 999         if (!*rfk) {
1000                 printk(TPACPI_ERR
1001                         "failed to allocate memory for rfkill class\n");
1002                 return -ENOMEM;
1003         }
1004
1005         (*rfk)->name = name;
1006         (*rfk)->get_state = get_state;
1007         (*rfk)->toggle_radio = toggle_radio;
1008         (*rfk)->state = initial_state;
1009
1010         res = rfkill_register(*rfk);
1011         if (res < 0) {
1012                 printk(TPACPI_ERR
1013                         "failed to register %s rfkill switch: %d\n",
1014                         name, res);
1015                 rfkill_free(*rfk);
1016                 *rfk = NULL;
1017                 return res;
1018         }
1019
1020         return 0;
1021 }
1022
1023 /*************************************************************************
1024  * thinkpad-acpi driver attributes
1025  */
1026
1027 /* interface_version --------------------------------------------------- */
1028 static ssize_t tpacpi_driver_interface_version_show(
1029                                 struct device_driver *drv,
1030                                 char *buf)
1031 {
1032         return snprintf(buf, PAGE_SIZE, "0x%08x\n", TPACPI_SYSFS_VERSION);
1033 }
1034
1035 static DRIVER_ATTR(interface_version, S_IRUGO,
1036                 tpacpi_driver_interface_version_show, NULL);
1037
1038 /* debug_level --------------------------------------------------------- */
1039 static ssize_t tpacpi_driver_debug_show(struct device_driver *drv,
1040                                                 char *buf)
1041 {
1042         return snprintf(buf, PAGE_SIZE, "0x%04x\n", dbg_level);
1043 }
1044
1045 static ssize_t tpacpi_driver_debug_store(struct device_driver *drv,
1046                                                 const char *buf, size_t count)
1047 {
1048         unsigned long t;
1049
1050         if (parse_strtoul(buf, 0xffff, &t))
1051                 return -EINVAL;
1052
1053         dbg_level = t;
1054
1055         return count;
1056 }
1057
1058 static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO,
1059                 tpacpi_driver_debug_show, tpacpi_driver_debug_store);
1060
1061 /* version ------------------------------------------------------------- */
1062 static ssize_t tpacpi_driver_version_show(struct device_driver *drv,
1063                                                 char *buf)
1064 {
1065         return snprintf(buf, PAGE_SIZE, "%s v%s\n",
1066                         TPACPI_DESC, TPACPI_VERSION);
1067 }
1068
1069 static DRIVER_ATTR(version, S_IRUGO,
1070                 tpacpi_driver_version_show, NULL);
1071
1072 /* --------------------------------------------------------------------- */
1073
1074 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
1075
1076 static void tpacpi_send_radiosw_update(void);
1077
1078 /* wlsw_emulstate ------------------------------------------------------ */
1079 static ssize_t tpacpi_driver_wlsw_emulstate_show(struct device_driver *drv,
1080                                                 char *buf)
1081 {
1082         return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wlsw_emulstate);
1083 }
1084
1085 static ssize_t tpacpi_driver_wlsw_emulstate_store(struct device_driver *drv,
1086                                                 const char *buf, size_t count)
1087 {
1088         unsigned long t;
1089
1090         if (parse_strtoul(buf, 1, &t))
1091                 return -EINVAL;
1092
1093         if (tpacpi_wlsw_emulstate != t) {
1094                 tpacpi_wlsw_emulstate = !!t;
1095                 tpacpi_send_radiosw_update();
1096         } else
1097                 tpacpi_wlsw_emulstate = !!t;
1098
1099         return count;
1100 }
1101
1102 static DRIVER_ATTR(wlsw_emulstate, S_IWUSR | S_IRUGO,
1103                 tpacpi_driver_wlsw_emulstate_show,
1104                 tpacpi_driver_wlsw_emulstate_store);
1105
1106 /* bluetooth_emulstate ------------------------------------------------- */
1107 static ssize_t tpacpi_driver_bluetooth_emulstate_show(
1108                                         struct device_driver *drv,
1109                                         char *buf)
1110 {
1111         return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_bluetooth_emulstate);
1112 }
1113
1114 static ssize_t tpacpi_driver_bluetooth_emulstate_store(
1115                                         struct device_driver *drv,
1116                                         const char *buf, size_t count)
1117 {
1118         unsigned long t;
1119
1120         if (parse_strtoul(buf, 1, &t))
1121                 return -EINVAL;
1122
1123         tpacpi_bluetooth_emulstate = !!t;
1124
1125         return count;
1126 }
1127
1128 static DRIVER_ATTR(bluetooth_emulstate, S_IWUSR | S_IRUGO,
1129                 tpacpi_driver_bluetooth_emulstate_show,
1130                 tpacpi_driver_bluetooth_emulstate_store);
1131
1132 /* wwan_emulstate ------------------------------------------------- */
1133 static ssize_t tpacpi_driver_wwan_emulstate_show(
1134                                         struct device_driver *drv,
1135                                         char *buf)
1136 {
1137         return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wwan_emulstate);
1138 }
1139
1140 static ssize_t tpacpi_driver_wwan_emulstate_store(
1141                                         struct device_driver *drv,
1142                                         const char *buf, size_t count)
1143 {
1144         unsigned long t;
1145
1146         if (parse_strtoul(buf, 1, &t))
1147                 return -EINVAL;
1148
1149         tpacpi_wwan_emulstate = !!t;
1150
1151         return count;
1152 }
1153
1154 static DRIVER_ATTR(wwan_emulstate, S_IWUSR | S_IRUGO,
1155                 tpacpi_driver_wwan_emulstate_show,
1156                 tpacpi_driver_wwan_emulstate_store);
1157
1158 /* uwb_emulstate ------------------------------------------------- */
1159 static ssize_t tpacpi_driver_uwb_emulstate_show(
1160                                         struct device_driver *drv,
1161                                         char *buf)
1162 {
1163         return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_uwb_emulstate);
1164 }
1165
1166 static ssize_t tpacpi_driver_uwb_emulstate_store(
1167                                         struct device_driver *drv,
1168                                         const char *buf, size_t count)
1169 {
1170         unsigned long t;
1171
1172         if (parse_strtoul(buf, 1, &t))
1173                 return -EINVAL;
1174
1175         tpacpi_uwb_emulstate = !!t;
1176
1177         return count;
1178 }
1179
1180 static DRIVER_ATTR(uwb_emulstate, S_IWUSR | S_IRUGO,
1181                 tpacpi_driver_uwb_emulstate_show,
1182                 tpacpi_driver_uwb_emulstate_store);
1183 #endif
1184
1185 /* --------------------------------------------------------------------- */
1186
1187 static struct driver_attribute *tpacpi_driver_attributes[] = {
1188         &driver_attr_debug_level, &driver_attr_version,
1189         &driver_attr_interface_version,
1190 };
1191
1192 static int __init tpacpi_create_driver_attributes(struct device_driver *drv)
1193 {
1194         int i, res;
1195
1196         i = 0;
1197         res = 0;
1198         while (!res && i < ARRAY_SIZE(tpacpi_driver_attributes)) {
1199                 res = driver_create_file(drv, tpacpi_driver_attributes[i]);
1200                 i++;
1201         }
1202
1203 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
1204         if (!res && dbg_wlswemul)
1205                 res = driver_create_file(drv, &driver_attr_wlsw_emulstate);
1206         if (!res && dbg_bluetoothemul)
1207                 res = driver_create_file(drv, &driver_attr_bluetooth_emulstate);
1208         if (!res && dbg_wwanemul)
1209                 res = driver_create_file(drv, &driver_attr_wwan_emulstate);
1210         if (!res && dbg_uwbemul)
1211                 res = driver_create_file(drv, &driver_attr_uwb_emulstate);
1212 #endif
1213
1214         return res;
1215 }
1216
1217 static void tpacpi_remove_driver_attributes(struct device_driver *drv)
1218 {
1219         int i;
1220
1221         for (i = 0; i < ARRAY_SIZE(tpacpi_driver_attributes); i++)
1222                 driver_remove_file(drv, tpacpi_driver_attributes[i]);
1223
1224 #ifdef THINKPAD_ACPI_DEBUGFACILITIES
1225         driver_remove_file(drv, &driver_attr_wlsw_emulstate);
1226         driver_remove_file(drv, &driver_attr_bluetooth_emulstate);
1227         driver_remove_file(drv, &driver_attr_wwan_emulstate);
1228         driver_remove_file(drv, &driver_attr_uwb_emulstate);
1229 #endif
1230 }
1231
1232 /****************************************************************************
1233  ****************************************************************************
1234  *
1235  * Subdrivers
1236  *
1237  ****************************************************************************
1238  ****************************************************************************/
1239
1240 /*************************************************************************
1241  * thinkpad-acpi init subdriver
1242  */
1243
1244 static int __init thinkpad_acpi_driver_init(struct ibm_init_struct *iibm)
1245 {
1246         printk(TPACPI_INFO "%s v%s\n", TPACPI_DESC, TPACPI_VERSION);
1247         printk(TPACPI_INFO "%s\n", TPACPI_URL);
1248
1249         printk(TPACPI_INFO "ThinkPad BIOS %s, EC %s\n",
1250                 (thinkpad_id.bios_version_str) ?
1251                         thinkpad_id.bios_version_str : "unknown",
1252                 (thinkpad_id.ec_version_str) ?
1253                         thinkpad_id.ec_version_str : "unknown");
1254
1255         if (thinkpad_id.vendor && thinkpad_id.model_str)
1256                 printk(TPACPI_INFO "%s %s, model %s\n",
1257                         (thinkpad_id.vendor == PCI_VENDOR_ID_IBM) ?
1258                                 "IBM" : ((thinkpad_id.vendor ==
1259                                                 PCI_VENDOR_ID_LENOVO) ?
1260                                         "Lenovo" : "Unknown vendor"),
1261                         thinkpad_id.model_str,
1262                         (thinkpad_id.nummodel_str) ?
1263                                 thinkpad_id.nummodel_str : "unknown");
1264
1265         return 0;
1266 }
1267
1268 static int thinkpad_acpi_driver_read(char *p)
1269 {
1270         int len = 0;
1271
1272         len += sprintf(p + len, "driver:\t\t%s\n", TPACPI_DESC);
1273         len += sprintf(p + len, "version:\t%s\n", TPACPI_VERSION);
1274
1275         return len;
1276 }
1277
1278 static struct ibm_struct thinkpad_acpi_driver_data = {
1279         .name = "driver",
1280         .read = thinkpad_acpi_driver_read,
1281 };
1282
1283 /*************************************************************************
1284  * Hotkey subdriver
1285  */
1286
1287 enum {  /* hot key scan codes (derived from ACPI DSDT) */
1288         TP_ACPI_HOTKEYSCAN_FNF1         = 0,
1289         TP_ACPI_HOTKEYSCAN_FNF2,
1290         TP_ACPI_HOTKEYSCAN_FNF3,
1291         TP_ACPI_HOTKEYSCAN_FNF4,
1292         TP_ACPI_HOTKEYSCAN_FNF5,
1293         TP_ACPI_HOTKEYSCAN_FNF6,
1294         TP_ACPI_HOTKEYSCAN_FNF7,
1295         TP_ACPI_HOTKEYSCAN_FNF8,
1296         TP_ACPI_HOTKEYSCAN_FNF9,
1297         TP_ACPI_HOTKEYSCAN_FNF10,
1298         TP_ACPI_HOTKEYSCAN_FNF11,
1299         TP_ACPI_HOTKEYSCAN_FNF12,
1300         TP_ACPI_HOTKEYSCAN_FNBACKSPACE,
1301         TP_ACPI_HOTKEYSCAN_FNINSERT,
1302         TP_ACPI_HOTKEYSCAN_FNDELETE,
1303         TP_ACPI_HOTKEYSCAN_FNHOME,
1304         TP_ACPI_HOTKEYSCAN_FNEND,
1305         TP_ACPI_HOTKEYSCAN_FNPAGEUP,
1306         TP_ACPI_HOTKEYSCAN_FNPAGEDOWN,
1307         TP_ACPI_HOTKEYSCAN_FNSPACE,
1308         TP_ACPI_HOTKEYSCAN_VOLUMEUP,
1309         TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
1310         TP_ACPI_HOTKEYSCAN_MUTE,
1311         TP_ACPI_HOTKEYSCAN_THINKPAD,
1312 };
1313
1314 enum {  /* Keys available through NVRAM polling */
1315         TPACPI_HKEY_NVRAM_KNOWN_MASK = 0x00fb88c0U,
1316         TPACPI_HKEY_NVRAM_GOOD_MASK  = 0x00fb8000U,
1317 };
1318
1319 enum {  /* Positions of some of the keys in hotkey masks */
1320         TP_ACPI_HKEY_DISPSWTCH_MASK     = 1 << TP_ACPI_HOTKEYSCAN_FNF7,
1321         TP_ACPI_HKEY_DISPXPAND_MASK     = 1 << TP_ACPI_HOTKEYSCAN_FNF8,
1322         TP_ACPI_HKEY_HIBERNATE_MASK     = 1 << TP_ACPI_HOTKEYSCAN_FNF12,
1323         TP_ACPI_HKEY_BRGHTUP_MASK       = 1 << TP_ACPI_HOTKEYSCAN_FNHOME,
1324         TP_ACPI_HKEY_BRGHTDWN_MASK      = 1 << TP_ACPI_HOTKEYSCAN_FNEND,
1325         TP_ACPI_HKEY_THNKLGHT_MASK      = 1 << TP_ACPI_HOTKEYSCAN_FNPAGEUP,
1326         TP_ACPI_HKEY_ZOOM_MASK          = 1 << TP_ACPI_HOTKEYSCAN_FNSPACE,
1327         TP_ACPI_HKEY_VOLUP_MASK         = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEUP,
1328         TP_ACPI_HKEY_VOLDWN_MASK        = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
1329         TP_ACPI_HKEY_MUTE_MASK          = 1 << TP_ACPI_HOTKEYSCAN_MUTE,
1330         TP_ACPI_HKEY_THINKPAD_MASK      = 1 << TP_ACPI_HOTKEYSCAN_THINKPAD,
1331 };
1332
1333 enum {  /* NVRAM to ACPI HKEY group map */
1334         TP_NVRAM_HKEY_GROUP_HK2         = TP_ACPI_HKEY_THINKPAD_MASK |
1335                                           TP_ACPI_HKEY_ZOOM_MASK |
1336                                           TP_ACPI_HKEY_DISPSWTCH_MASK |
1337                                           TP_ACPI_HKEY_HIBERNATE_MASK,
1338         TP_NVRAM_HKEY_GROUP_BRIGHTNESS  = TP_ACPI_HKEY_BRGHTUP_MASK |
1339                                           TP_ACPI_HKEY_BRGHTDWN_MASK,
1340         TP_NVRAM_HKEY_GROUP_VOLUME      = TP_ACPI_HKEY_VOLUP_MASK |
1341                                           TP_ACPI_HKEY_VOLDWN_MASK |
1342                                           TP_ACPI_HKEY_MUTE_MASK,
1343 };
1344
1345 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1346 struct tp_nvram_state {
1347        u16 thinkpad_toggle:1;
1348        u16 zoom_toggle:1;
1349        u16 display_toggle:1;
1350        u16 thinklight_toggle:1;
1351        u16 hibernate_toggle:1;
1352        u16 displayexp_toggle:1;
1353        u16 display_state:1;
1354        u16 brightness_toggle:1;
1355        u16 volume_toggle:1;
1356        u16 mute:1;
1357
1358        u8 brightness_level;
1359        u8 volume_level;
1360 };
1361
1362 static struct task_struct *tpacpi_hotkey_task;
1363 static u32 hotkey_source_mask;          /* bit mask 0=ACPI,1=NVRAM */
1364 static int hotkey_poll_freq = 10;       /* Hz */
1365 static struct mutex hotkey_thread_mutex;
1366 static struct mutex hotkey_thread_data_mutex;
1367 static unsigned int hotkey_config_change;
1368
1369 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1370
1371 #define hotkey_source_mask 0U
1372
1373 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1374
1375 static struct mutex hotkey_mutex;
1376
1377 static enum {   /* Reasons for waking up */
1378         TP_ACPI_WAKEUP_NONE = 0,        /* None or unknown */
1379         TP_ACPI_WAKEUP_BAYEJ,           /* Bay ejection request */
1380         TP_ACPI_WAKEUP_UNDOCK,          /* Undock request */
1381 } hotkey_wakeup_reason;
1382
1383 static int hotkey_autosleep_ack;
1384
1385 static int hotkey_orig_status;
1386 static u32 hotkey_orig_mask;
1387 static u32 hotkey_all_mask;
1388 static u32 hotkey_reserved_mask;
1389 static u32 hotkey_mask;
1390
1391 static unsigned int hotkey_report_mode;
1392
1393 static u16 *hotkey_keycode_map;
1394
1395 static struct attribute_set *hotkey_dev_attributes;
1396
1397 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1398 #define HOTKEY_CONFIG_CRITICAL_START \
1399         do { \
1400                 mutex_lock(&hotkey_thread_data_mutex); \
1401                 hotkey_config_change++; \
1402         } while (0);
1403 #define HOTKEY_CONFIG_CRITICAL_END \
1404         mutex_unlock(&hotkey_thread_data_mutex);
1405 #else
1406 #define HOTKEY_CONFIG_CRITICAL_START
1407 #define HOTKEY_CONFIG_CRITICAL_END
1408 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1409
1410 /* HKEY.MHKG() return bits */
1411 #define TP_HOTKEY_TABLET_MASK (1 << 3)
1412
1413 static int hotkey_get_wlsw(int *status)
1414 {
1415 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
1416         if (dbg_wlswemul) {
1417                 *status = !!tpacpi_wlsw_emulstate;
1418                 return 0;
1419         }
1420 #endif
1421         if (!acpi_evalf(hkey_handle, status, "WLSW", "d"))
1422                 return -EIO;
1423         return 0;
1424 }
1425
1426 static int hotkey_get_tablet_mode(int *status)
1427 {
1428         int s;
1429
1430         if (!acpi_evalf(hkey_handle, &s, "MHKG", "d"))
1431                 return -EIO;
1432
1433         *status = ((s & TP_HOTKEY_TABLET_MASK) != 0);
1434         return 0;
1435 }
1436
1437 /*
1438  * Call with hotkey_mutex held
1439  */
1440 static int hotkey_mask_get(void)
1441 {
1442         u32 m = 0;
1443
1444         if (tp_features.hotkey_mask) {
1445                 if (!acpi_evalf(hkey_handle, &m, "DHKN", "d"))
1446                         return -EIO;
1447         }
1448         hotkey_mask = m | (hotkey_source_mask & hotkey_mask);
1449
1450         return 0;
1451 }
1452
1453 /*
1454  * Call with hotkey_mutex held
1455  */
1456 static int hotkey_mask_set(u32 mask)
1457 {
1458         int i;
1459         int rc = 0;
1460
1461         if (tp_features.hotkey_mask) {
1462                 if (!tp_warned.hotkey_mask_ff &&
1463                     (mask == 0xffff || mask == 0xffffff ||
1464                      mask == 0xffffffff)) {
1465                         tp_warned.hotkey_mask_ff = 1;
1466                         printk(TPACPI_NOTICE
1467                                "setting the hotkey mask to 0x%08x is likely "
1468                                "not the best way to go about it\n", mask);
1469                         printk(TPACPI_NOTICE
1470                                "please consider using the driver defaults, "
1471                                "and refer to up-to-date thinkpad-acpi "
1472                                "documentation\n");
1473                 }
1474
1475                 HOTKEY_CONFIG_CRITICAL_START
1476                 for (i = 0; i < 32; i++) {
1477                         u32 m = 1 << i;
1478                         /* enable in firmware mask only keys not in NVRAM
1479                          * mode, but enable the key in the cached hotkey_mask
1480                          * regardless of mode, or the key will end up
1481                          * disabled by hotkey_mask_get() */
1482                         if (!acpi_evalf(hkey_handle,
1483                                         NULL, "MHKM", "vdd", i + 1,
1484                                         !!((mask & ~hotkey_source_mask) & m))) {
1485                                 rc = -EIO;
1486                                 break;
1487                         } else {
1488                                 hotkey_mask = (hotkey_mask & ~m) | (mask & m);
1489                         }
1490                 }
1491                 HOTKEY_CONFIG_CRITICAL_END
1492
1493                 /* hotkey_mask_get must be called unconditionally below */
1494                 if (!hotkey_mask_get() && !rc &&
1495                     (hotkey_mask & ~hotkey_source_mask) !=
1496                      (mask & ~hotkey_source_mask)) {
1497                         printk(TPACPI_NOTICE
1498                                "requested hot key mask 0x%08x, but "
1499                                "firmware forced it to 0x%08x\n",
1500                                mask, hotkey_mask);
1501                 }
1502         } else {
1503 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1504                 HOTKEY_CONFIG_CRITICAL_START
1505                 hotkey_mask = mask & hotkey_source_mask;
1506                 HOTKEY_CONFIG_CRITICAL_END
1507                 hotkey_mask_get();
1508                 if (hotkey_mask != mask) {
1509                         printk(TPACPI_NOTICE
1510                                "requested hot key mask 0x%08x, "
1511                                "forced to 0x%08x (NVRAM poll mask is "
1512                                "0x%08x): no firmware mask support\n",
1513                                mask, hotkey_mask, hotkey_source_mask);
1514                 }
1515 #else
1516                 hotkey_mask_get();
1517                 rc = -ENXIO;
1518 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1519         }
1520
1521         return rc;
1522 }
1523
1524 static int hotkey_status_get(int *status)
1525 {
1526         if (!acpi_evalf(hkey_handle, status, "DHKC", "d"))
1527                 return -EIO;
1528
1529         return 0;
1530 }
1531
1532 static int hotkey_status_set(int status)
1533 {
1534         if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", status))
1535                 return -EIO;
1536
1537         return 0;
1538 }
1539
1540 static void tpacpi_input_send_tabletsw(void)
1541 {
1542         int state;
1543
1544         if (tp_features.hotkey_tablet &&
1545             !hotkey_get_tablet_mode(&state)) {
1546                 mutex_lock(&tpacpi_inputdev_send_mutex);
1547
1548                 input_report_switch(tpacpi_inputdev,
1549                                     SW_TABLET_MODE, !!state);
1550                 input_sync(tpacpi_inputdev);
1551
1552                 mutex_unlock(&tpacpi_inputdev_send_mutex);
1553         }
1554 }
1555
1556 static void tpacpi_input_send_key(unsigned int scancode)
1557 {
1558         unsigned int keycode;
1559
1560         keycode = hotkey_keycode_map[scancode];
1561
1562         if (keycode != KEY_RESERVED) {
1563                 mutex_lock(&tpacpi_inputdev_send_mutex);
1564
1565                 input_report_key(tpacpi_inputdev, keycode, 1);
1566                 if (keycode == KEY_UNKNOWN)
1567                         input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN,
1568                                     scancode);
1569                 input_sync(tpacpi_inputdev);
1570
1571                 input_report_key(tpacpi_inputdev, keycode, 0);
1572                 if (keycode == KEY_UNKNOWN)
1573                         input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN,
1574                                     scancode);
1575                 input_sync(tpacpi_inputdev);
1576
1577                 mutex_unlock(&tpacpi_inputdev_send_mutex);
1578         }
1579 }
1580
1581 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1582 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver;
1583
1584 static void tpacpi_hotkey_send_key(unsigned int scancode)
1585 {
1586         tpacpi_input_send_key(scancode);
1587         if (hotkey_report_mode < 2) {
1588                 acpi_bus_generate_proc_event(ibm_hotkey_acpidriver.device,
1589                                                 0x80, 0x1001 + scancode);
1590         }
1591 }
1592
1593 static void hotkey_read_nvram(struct tp_nvram_state *n, u32 m)
1594 {
1595         u8 d;
1596
1597         if (m & TP_NVRAM_HKEY_GROUP_HK2) {
1598                 d = nvram_read_byte(TP_NVRAM_ADDR_HK2);
1599                 n->thinkpad_toggle = !!(d & TP_NVRAM_MASK_HKT_THINKPAD);
1600                 n->zoom_toggle = !!(d & TP_NVRAM_MASK_HKT_ZOOM);
1601                 n->display_toggle = !!(d & TP_NVRAM_MASK_HKT_DISPLAY);
1602                 n->hibernate_toggle = !!(d & TP_NVRAM_MASK_HKT_HIBERNATE);
1603         }
1604         if (m & TP_ACPI_HKEY_THNKLGHT_MASK) {
1605                 d = nvram_read_byte(TP_NVRAM_ADDR_THINKLIGHT);
1606                 n->thinklight_toggle = !!(d & TP_NVRAM_MASK_THINKLIGHT);
1607         }
1608         if (m & TP_ACPI_HKEY_DISPXPAND_MASK) {
1609                 d = nvram_read_byte(TP_NVRAM_ADDR_VIDEO);
1610                 n->displayexp_toggle =
1611                                 !!(d & TP_NVRAM_MASK_HKT_DISPEXPND);
1612         }
1613         if (m & TP_NVRAM_HKEY_GROUP_BRIGHTNESS) {
1614                 d = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS);
1615                 n->brightness_level = (d & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
1616                                 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
1617                 n->brightness_toggle =
1618                                 !!(d & TP_NVRAM_MASK_HKT_BRIGHTNESS);
1619         }
1620         if (m & TP_NVRAM_HKEY_GROUP_VOLUME) {
1621                 d = nvram_read_byte(TP_NVRAM_ADDR_MIXER);
1622                 n->volume_level = (d & TP_NVRAM_MASK_LEVEL_VOLUME)
1623                                 >> TP_NVRAM_POS_LEVEL_VOLUME;
1624                 n->mute = !!(d & TP_NVRAM_MASK_MUTE);
1625                 n->volume_toggle = !!(d & TP_NVRAM_MASK_HKT_VOLUME);
1626         }
1627 }
1628
1629 #define TPACPI_COMPARE_KEY(__scancode, __member) \
1630         do { \
1631                 if ((mask & (1 << __scancode)) && \
1632                     oldn->__member != newn->__member) \
1633                 tpacpi_hotkey_send_key(__scancode); \
1634         } while (0)
1635
1636 #define TPACPI_MAY_SEND_KEY(__scancode) \
1637         do { if (mask & (1 << __scancode)) \
1638                 tpacpi_hotkey_send_key(__scancode); } while (0)
1639
1640 static void hotkey_compare_and_issue_event(struct tp_nvram_state *oldn,
1641                                            struct tp_nvram_state *newn,
1642                                            u32 mask)
1643 {
1644         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_THINKPAD, thinkpad_toggle);
1645         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNSPACE, zoom_toggle);
1646         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF7, display_toggle);
1647         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF12, hibernate_toggle);
1648
1649         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNPAGEUP, thinklight_toggle);
1650
1651         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF8, displayexp_toggle);
1652
1653         /* handle volume */
1654         if (oldn->volume_toggle != newn->volume_toggle) {
1655                 if (oldn->mute != newn->mute) {
1656                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE);
1657                 }
1658                 if (oldn->volume_level > newn->volume_level) {
1659                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
1660                 } else if (oldn->volume_level < newn->volume_level) {
1661                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
1662                 } else if (oldn->mute == newn->mute) {
1663                         /* repeated key presses that didn't change state */
1664                         if (newn->mute) {
1665                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE);
1666                         } else if (newn->volume_level != 0) {
1667                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
1668                         } else {
1669                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
1670                         }
1671                 }
1672         }
1673
1674         /* handle brightness */
1675         if (oldn->brightness_toggle != newn->brightness_toggle) {
1676                 if (oldn->brightness_level < newn->brightness_level) {
1677                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
1678                 } else if (oldn->brightness_level > newn->brightness_level) {
1679                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
1680                 } else {
1681                         /* repeated key presses that didn't change state */
1682                         if (newn->brightness_level != 0) {
1683                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
1684                         } else {
1685                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
1686                         }
1687                 }
1688         }
1689 }
1690
1691 #undef TPACPI_COMPARE_KEY
1692 #undef TPACPI_MAY_SEND_KEY
1693
1694 static int hotkey_kthread(void *data)
1695 {
1696         struct tp_nvram_state s[2];
1697         u32 mask;
1698         unsigned int si, so;
1699         unsigned long t;
1700         unsigned int change_detector, must_reset;
1701
1702         mutex_lock(&hotkey_thread_mutex);
1703
1704         if (tpacpi_lifecycle == TPACPI_LIFE_EXITING)
1705                 goto exit;
1706
1707         set_freezable();
1708
1709         so = 0;
1710         si = 1;
1711         t = 0;
1712
1713         /* Initial state for compares */
1714         mutex_lock(&hotkey_thread_data_mutex);
1715         change_detector = hotkey_config_change;
1716         mask = hotkey_source_mask & hotkey_mask;
1717         mutex_unlock(&hotkey_thread_data_mutex);
1718         hotkey_read_nvram(&s[so], mask);
1719
1720         while (!kthread_should_stop() && hotkey_poll_freq) {
1721                 if (t == 0)
1722                         t = 1000/hotkey_poll_freq;
1723                 t = msleep_interruptible(t);
1724                 if (unlikely(kthread_should_stop()))
1725                         break;
1726                 must_reset = try_to_freeze();
1727                 if (t > 0 && !must_reset)
1728                         continue;
1729
1730                 mutex_lock(&hotkey_thread_data_mutex);
1731                 if (must_reset || hotkey_config_change != change_detector) {
1732                         /* forget old state on thaw or config change */
1733                         si = so;
1734                         t = 0;
1735                         change_detector = hotkey_config_change;
1736                 }
1737                 mask = hotkey_source_mask & hotkey_mask;
1738                 mutex_unlock(&hotkey_thread_data_mutex);
1739
1740                 if (likely(mask)) {
1741                         hotkey_read_nvram(&s[si], mask);
1742                         if (likely(si != so)) {
1743                                 hotkey_compare_and_issue_event(&s[so], &s[si],
1744                                                                 mask);
1745                         }
1746                 }
1747
1748                 so = si;
1749                 si ^= 1;
1750         }
1751
1752 exit:
1753         mutex_unlock(&hotkey_thread_mutex);
1754         return 0;
1755 }
1756
1757 static void hotkey_poll_stop_sync(void)
1758 {
1759         if (tpacpi_hotkey_task) {
1760                 if (frozen(tpacpi_hotkey_task) ||
1761                     freezing(tpacpi_hotkey_task))
1762                         thaw_process(tpacpi_hotkey_task);
1763
1764                 kthread_stop(tpacpi_hotkey_task);
1765                 tpacpi_hotkey_task = NULL;
1766                 mutex_lock(&hotkey_thread_mutex);
1767                 /* at this point, the thread did exit */
1768                 mutex_unlock(&hotkey_thread_mutex);
1769         }
1770 }
1771
1772 /* call with hotkey_mutex held */
1773 static void hotkey_poll_setup(int may_warn)
1774 {
1775         if ((hotkey_source_mask & hotkey_mask) != 0 &&
1776             hotkey_poll_freq > 0 &&
1777             (tpacpi_inputdev->users > 0 || hotkey_report_mode < 2)) {
1778                 if (!tpacpi_hotkey_task) {
1779                         tpacpi_hotkey_task = kthread_run(hotkey_kthread,
1780                                         NULL, TPACPI_NVRAM_KTHREAD_NAME);
1781                         if (IS_ERR(tpacpi_hotkey_task)) {
1782                                 tpacpi_hotkey_task = NULL;
1783                                 printk(TPACPI_ERR
1784                                        "could not create kernel thread "
1785                                        "for hotkey polling\n");
1786                         }
1787                 }
1788         } else {
1789                 hotkey_poll_stop_sync();
1790                 if (may_warn &&
1791                     hotkey_source_mask != 0 && hotkey_poll_freq == 0) {
1792                         printk(TPACPI_NOTICE
1793                                 "hot keys 0x%08x require polling, "
1794                                 "which is currently disabled\n",
1795                                 hotkey_source_mask);
1796                 }
1797         }
1798 }
1799
1800 static void hotkey_poll_setup_safe(int may_warn)
1801 {
1802         mutex_lock(&hotkey_mutex);
1803         hotkey_poll_setup(may_warn);
1804         mutex_unlock(&hotkey_mutex);
1805 }
1806
1807 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1808
1809 static void hotkey_poll_setup_safe(int __unused)
1810 {
1811 }
1812
1813 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1814
1815 static int hotkey_inputdev_open(struct input_dev *dev)
1816 {
1817         switch (tpacpi_lifecycle) {
1818         case TPACPI_LIFE_INIT:
1819                 /*
1820                  * hotkey_init will call hotkey_poll_setup_safe
1821                  * at the appropriate moment
1822                  */
1823                 return 0;
1824         case TPACPI_LIFE_EXITING:
1825                 return -EBUSY;
1826         case TPACPI_LIFE_RUNNING:
1827                 hotkey_poll_setup_safe(0);
1828                 return 0;
1829         }
1830
1831         /* Should only happen if tpacpi_lifecycle is corrupt */
1832         BUG();
1833         return -EBUSY;
1834 }
1835
1836 static void hotkey_inputdev_close(struct input_dev *dev)
1837 {
1838         /* disable hotkey polling when possible */
1839         if (tpacpi_lifecycle == TPACPI_LIFE_RUNNING)
1840                 hotkey_poll_setup_safe(0);
1841 }
1842
1843 /* sysfs hotkey enable ------------------------------------------------- */
1844 static ssize_t hotkey_enable_show(struct device *dev,
1845                            struct device_attribute *attr,
1846                            char *buf)
1847 {
1848         int res, status;
1849
1850         res = hotkey_status_get(&status);
1851         if (res)
1852                 return res;
1853
1854         return snprintf(buf, PAGE_SIZE, "%d\n", status);
1855 }
1856
1857 static ssize_t hotkey_enable_store(struct device *dev,
1858                             struct device_attribute *attr,
1859                             const char *buf, size_t count)
1860 {
1861         unsigned long t;
1862         int res;
1863
1864         if (parse_strtoul(buf, 1, &t))
1865                 return -EINVAL;
1866
1867         res = hotkey_status_set(t);
1868
1869         return (res) ? res : count;
1870 }
1871
1872 static struct device_attribute dev_attr_hotkey_enable =
1873         __ATTR(hotkey_enable, S_IWUSR | S_IRUGO,
1874                 hotkey_enable_show, hotkey_enable_store);
1875
1876 /* sysfs hotkey mask --------------------------------------------------- */
1877 static ssize_t hotkey_mask_show(struct device *dev,
1878                            struct device_attribute *attr,
1879                            char *buf)
1880 {
1881         int res;
1882
1883         if (mutex_lock_killable(&hotkey_mutex))
1884                 return -ERESTARTSYS;
1885         res = hotkey_mask_get();
1886         mutex_unlock(&hotkey_mutex);
1887
1888         return (res)?
1889                 res : snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_mask);
1890 }
1891
1892 static ssize_t hotkey_mask_store(struct device *dev,
1893                             struct device_attribute *attr,
1894                             const char *buf, size_t count)
1895 {
1896         unsigned long t;
1897         int res;
1898
1899         if (parse_strtoul(buf, 0xffffffffUL, &t))
1900                 return -EINVAL;
1901
1902         if (mutex_lock_killable(&hotkey_mutex))
1903                 return -ERESTARTSYS;
1904
1905         res = hotkey_mask_set(t);
1906
1907 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1908         hotkey_poll_setup(1);
1909 #endif
1910
1911         mutex_unlock(&hotkey_mutex);
1912
1913         return (res) ? res : count;
1914 }
1915
1916 static struct device_attribute dev_attr_hotkey_mask =
1917         __ATTR(hotkey_mask, S_IWUSR | S_IRUGO,
1918                 hotkey_mask_show, hotkey_mask_store);
1919
1920 /* sysfs hotkey bios_enabled ------------------------------------------- */
1921 static ssize_t hotkey_bios_enabled_show(struct device *dev,
1922                            struct device_attribute *attr,
1923                            char *buf)
1924 {
1925         return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_orig_status);
1926 }
1927
1928 static struct device_attribute dev_attr_hotkey_bios_enabled =
1929         __ATTR(hotkey_bios_enabled, S_IRUGO, hotkey_bios_enabled_show, NULL);
1930
1931 /* sysfs hotkey bios_mask ---------------------------------------------- */
1932 static ssize_t hotkey_bios_mask_show(struct device *dev,
1933                            struct device_attribute *attr,
1934                            char *buf)
1935 {
1936         return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_orig_mask);
1937 }
1938
1939 static struct device_attribute dev_attr_hotkey_bios_mask =
1940         __ATTR(hotkey_bios_mask, S_IRUGO, hotkey_bios_mask_show, NULL);
1941
1942 /* sysfs hotkey all_mask ----------------------------------------------- */
1943 static ssize_t hotkey_all_mask_show(struct device *dev,
1944                            struct device_attribute *attr,
1945                            char *buf)
1946 {
1947         return snprintf(buf, PAGE_SIZE, "0x%08x\n",
1948                                 hotkey_all_mask | hotkey_source_mask);
1949 }
1950
1951 static struct device_attribute dev_attr_hotkey_all_mask =
1952         __ATTR(hotkey_all_mask, S_IRUGO, hotkey_all_mask_show, NULL);
1953
1954 /* sysfs hotkey recommended_mask --------------------------------------- */
1955 static ssize_t hotkey_recommended_mask_show(struct device *dev,
1956                                             struct device_attribute *attr,
1957                                             char *buf)
1958 {
1959         return snprintf(buf, PAGE_SIZE, "0x%08x\n",
1960                         (hotkey_all_mask | hotkey_source_mask)
1961                         & ~hotkey_reserved_mask);
1962 }
1963
1964 static struct device_attribute dev_attr_hotkey_recommended_mask =
1965         __ATTR(hotkey_recommended_mask, S_IRUGO,
1966                 hotkey_recommended_mask_show, NULL);
1967
1968 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1969
1970 /* sysfs hotkey hotkey_source_mask ------------------------------------- */
1971 static ssize_t hotkey_source_mask_show(struct device *dev,
1972                            struct device_attribute *attr,
1973                            char *buf)
1974 {
1975         return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_source_mask);
1976 }
1977
1978 static ssize_t hotkey_source_mask_store(struct device *dev,
1979                             struct device_attribute *attr,
1980                             const char *buf, size_t count)
1981 {
1982         unsigned long t;
1983
1984         if (parse_strtoul(buf, 0xffffffffUL, &t) ||
1985                 ((t & ~TPACPI_HKEY_NVRAM_KNOWN_MASK) != 0))
1986                 return -EINVAL;
1987
1988         if (mutex_lock_killable(&hotkey_mutex))
1989                 return -ERESTARTSYS;
1990
1991         HOTKEY_CONFIG_CRITICAL_START
1992         hotkey_source_mask = t;
1993         HOTKEY_CONFIG_CRITICAL_END
1994
1995         hotkey_poll_setup(1);
1996
1997         mutex_unlock(&hotkey_mutex);
1998
1999         return count;
2000 }
2001
2002 static struct device_attribute dev_attr_hotkey_source_mask =
2003         __ATTR(hotkey_source_mask, S_IWUSR | S_IRUGO,
2004                 hotkey_source_mask_show, hotkey_source_mask_store);
2005
2006 /* sysfs hotkey hotkey_poll_freq --------------------------------------- */
2007 static ssize_t hotkey_poll_freq_show(struct device *dev,
2008                            struct device_attribute *attr,
2009                            char *buf)
2010 {
2011         return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_poll_freq);
2012 }
2013
2014 static ssize_t hotkey_poll_freq_store(struct device *dev,
2015                             struct device_attribute *attr,
2016                             const char *buf, size_t count)
2017 {
2018         unsigned long t;
2019
2020         if (parse_strtoul(buf, 25, &t))
2021                 return -EINVAL;
2022
2023         if (mutex_lock_killable(&hotkey_mutex))
2024                 return -ERESTARTSYS;
2025
2026         hotkey_poll_freq = t;
2027
2028         hotkey_poll_setup(1);
2029         mutex_unlock(&hotkey_mutex);
2030
2031         return count;
2032 }
2033
2034 static struct device_attribute dev_attr_hotkey_poll_freq =
2035         __ATTR(hotkey_poll_freq, S_IWUSR | S_IRUGO,
2036                 hotkey_poll_freq_show, hotkey_poll_freq_store);
2037
2038 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2039
2040 /* sysfs hotkey radio_sw (pollable) ------------------------------------ */
2041 static ssize_t hotkey_radio_sw_show(struct device *dev,
2042                            struct device_attribute *attr,
2043                            char *buf)
2044 {
2045         int res, s;
2046         res = hotkey_get_wlsw(&s);
2047         if (res < 0)
2048                 return res;
2049
2050         return snprintf(buf, PAGE_SIZE, "%d\n", !!s);
2051 }
2052
2053 static struct device_attribute dev_attr_hotkey_radio_sw =
2054         __ATTR(hotkey_radio_sw, S_IRUGO, hotkey_radio_sw_show, NULL);
2055
2056 static void hotkey_radio_sw_notify_change(void)
2057 {
2058         if (tp_features.hotkey_wlsw)
2059                 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2060                              "hotkey_radio_sw");
2061 }
2062
2063 /* sysfs hotkey tablet mode (pollable) --------------------------------- */
2064 static ssize_t hotkey_tablet_mode_show(struct device *dev,
2065                            struct device_attribute *attr,
2066                            char *buf)
2067 {
2068         int res, s;
2069         res = hotkey_get_tablet_mode(&s);
2070         if (res < 0)
2071                 return res;
2072
2073         return snprintf(buf, PAGE_SIZE, "%d\n", !!s);
2074 }
2075
2076 static struct device_attribute dev_attr_hotkey_tablet_mode =
2077         __ATTR(hotkey_tablet_mode, S_IRUGO, hotkey_tablet_mode_show, NULL);
2078
2079 static void hotkey_tablet_mode_notify_change(void)
2080 {
2081         if (tp_features.hotkey_tablet)
2082                 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2083                              "hotkey_tablet_mode");
2084 }
2085
2086 /* sysfs hotkey report_mode -------------------------------------------- */
2087 static ssize_t hotkey_report_mode_show(struct device *dev,
2088                            struct device_attribute *attr,
2089                            char *buf)
2090 {
2091         return snprintf(buf, PAGE_SIZE, "%d\n",
2092                 (hotkey_report_mode != 0) ? hotkey_report_mode : 1);
2093 }
2094
2095 static struct device_attribute dev_attr_hotkey_report_mode =
2096         __ATTR(hotkey_report_mode, S_IRUGO, hotkey_report_mode_show, NULL);
2097
2098 /* sysfs wakeup reason (pollable) -------------------------------------- */
2099 static ssize_t hotkey_wakeup_reason_show(struct device *dev,
2100                            struct device_attribute *attr,
2101                            char *buf)
2102 {
2103         return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_wakeup_reason);
2104 }
2105
2106 static struct device_attribute dev_attr_hotkey_wakeup_reason =
2107         __ATTR(wakeup_reason, S_IRUGO, hotkey_wakeup_reason_show, NULL);
2108
2109 static void hotkey_wakeup_reason_notify_change(void)
2110 {
2111         if (tp_features.hotkey_mask)
2112                 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2113                              "wakeup_reason");
2114 }
2115
2116 /* sysfs wakeup hotunplug_complete (pollable) -------------------------- */
2117 static ssize_t hotkey_wakeup_hotunplug_complete_show(struct device *dev,
2118                            struct device_attribute *attr,
2119                            char *buf)
2120 {
2121         return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_autosleep_ack);
2122 }
2123
2124 static struct device_attribute dev_attr_hotkey_wakeup_hotunplug_complete =
2125         __ATTR(wakeup_hotunplug_complete, S_IRUGO,
2126                hotkey_wakeup_hotunplug_complete_show, NULL);
2127
2128 static void hotkey_wakeup_hotunplug_complete_notify_change(void)
2129 {
2130         if (tp_features.hotkey_mask)
2131                 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2132                              "wakeup_hotunplug_complete");
2133 }
2134
2135 /* --------------------------------------------------------------------- */
2136
2137 static struct attribute *hotkey_attributes[] __initdata = {
2138         &dev_attr_hotkey_enable.attr,
2139         &dev_attr_hotkey_bios_enabled.attr,
2140         &dev_attr_hotkey_report_mode.attr,
2141 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2142         &dev_attr_hotkey_mask.attr,
2143         &dev_attr_hotkey_all_mask.attr,
2144         &dev_attr_hotkey_recommended_mask.attr,
2145         &dev_attr_hotkey_source_mask.attr,
2146         &dev_attr_hotkey_poll_freq.attr,
2147 #endif
2148 };
2149
2150 static struct attribute *hotkey_mask_attributes[] __initdata = {
2151         &dev_attr_hotkey_bios_mask.attr,
2152 #ifndef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2153         &dev_attr_hotkey_mask.attr,
2154         &dev_attr_hotkey_all_mask.attr,
2155         &dev_attr_hotkey_recommended_mask.attr,
2156 #endif
2157         &dev_attr_hotkey_wakeup_reason.attr,
2158         &dev_attr_hotkey_wakeup_hotunplug_complete.attr,
2159 };
2160
2161 static void bluetooth_update_rfk(void);
2162 static void wan_update_rfk(void);
2163 static void uwb_update_rfk(void);
2164 static void tpacpi_send_radiosw_update(void)
2165 {
2166         int wlsw;
2167
2168         /* Sync these BEFORE sending any rfkill events */
2169         if (tp_features.bluetooth)
2170                 bluetooth_update_rfk();
2171         if (tp_features.wan)
2172                 wan_update_rfk();
2173         if (tp_features.uwb)
2174                 uwb_update_rfk();
2175
2176         if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&wlsw)) {
2177                 mutex_lock(&tpacpi_inputdev_send_mutex);
2178
2179                 input_report_switch(tpacpi_inputdev,
2180                                     SW_RFKILL_ALL, !!wlsw);
2181                 input_sync(tpacpi_inputdev);
2182
2183                 mutex_unlock(&tpacpi_inputdev_send_mutex);
2184         }
2185         hotkey_radio_sw_notify_change();
2186 }
2187
2188 static void hotkey_exit(void)
2189 {
2190 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2191         hotkey_poll_stop_sync();
2192 #endif
2193
2194         if (hotkey_dev_attributes)
2195                 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
2196
2197         kfree(hotkey_keycode_map);
2198
2199         if (tp_features.hotkey) {
2200                 dbg_printk(TPACPI_DBG_EXIT,
2201                            "restoring original hot key mask\n");
2202                 /* no short-circuit boolean operator below! */
2203                 if ((hotkey_mask_set(hotkey_orig_mask) |
2204                      hotkey_status_set(hotkey_orig_status)) != 0)
2205                         printk(TPACPI_ERR
2206                                "failed to restore hot key mask "
2207                                "to BIOS defaults\n");
2208         }
2209 }
2210
2211 static int __init hotkey_init(struct ibm_init_struct *iibm)
2212 {
2213         /* Requirements for changing the default keymaps:
2214          *
2215          * 1. Many of the keys are mapped to KEY_RESERVED for very
2216          *    good reasons.  Do not change them unless you have deep
2217          *    knowledge on the IBM and Lenovo ThinkPad firmware for
2218          *    the various ThinkPad models.  The driver behaves
2219          *    differently for KEY_RESERVED: such keys have their
2220          *    hot key mask *unset* in mask_recommended, and also
2221          *    in the initial hot key mask programmed into the
2222          *    firmware at driver load time, which means the firm-
2223          *    ware may react very differently if you change them to
2224          *    something else;
2225          *
2226          * 2. You must be subscribed to the linux-thinkpad and
2227          *    ibm-acpi-devel mailing lists, and you should read the
2228          *    list archives since 2007 if you want to change the
2229          *    keymaps.  This requirement exists so that you will
2230          *    know the past history of problems with the thinkpad-
2231          *    acpi driver keymaps, and also that you will be
2232          *    listening to any bug reports;
2233          *
2234          * 3. Do not send thinkpad-acpi specific patches directly to
2235          *    for merging, *ever*.  Send them to the linux-acpi
2236          *    mailinglist for comments.  Merging is to be done only
2237          *    through acpi-test and the ACPI maintainer.
2238          *
2239          * If the above is too much to ask, don't change the keymap.
2240          * Ask the thinkpad-acpi maintainer to do it, instead.
2241          */
2242         static u16 ibm_keycode_map[] __initdata = {
2243                 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
2244                 KEY_FN_F1,      KEY_FN_F2,      KEY_COFFEE,     KEY_SLEEP,
2245                 KEY_WLAN,       KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
2246                 KEY_FN_F9,      KEY_FN_F10,     KEY_FN_F11,     KEY_SUSPEND,
2247
2248                 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
2249                 KEY_UNKNOWN,    /* 0x0C: FN+BACKSPACE */
2250                 KEY_UNKNOWN,    /* 0x0D: FN+INSERT */
2251                 KEY_UNKNOWN,    /* 0x0E: FN+DELETE */
2252
2253                 /* brightness: firmware always reacts to them, unless
2254                  * X.org did some tricks in the radeon BIOS scratch
2255                  * registers of *some* models */
2256                 KEY_RESERVED,   /* 0x0F: FN+HOME (brightness up) */
2257                 KEY_RESERVED,   /* 0x10: FN+END (brightness down) */
2258
2259                 /* Thinklight: firmware always react to it */
2260                 KEY_RESERVED,   /* 0x11: FN+PGUP (thinklight toggle) */
2261
2262                 KEY_UNKNOWN,    /* 0x12: FN+PGDOWN */
2263                 KEY_ZOOM,       /* 0x13: FN+SPACE (zoom) */
2264
2265                 /* Volume: firmware always react to it and reprograms
2266                  * the built-in *extra* mixer.  Never map it to control
2267                  * another mixer by default. */
2268                 KEY_RESERVED,   /* 0x14: VOLUME UP */
2269                 KEY_RESERVED,   /* 0x15: VOLUME DOWN */
2270                 KEY_RESERVED,   /* 0x16: MUTE */
2271
2272                 KEY_VENDOR,     /* 0x17: Thinkpad/AccessIBM/Lenovo */
2273
2274                 /* (assignments unknown, please report if found) */
2275                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2276                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2277         };
2278         static u16 lenovo_keycode_map[] __initdata = {
2279                 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
2280                 KEY_FN_F1,      KEY_COFFEE,     KEY_BATTERY,    KEY_SLEEP,
2281                 KEY_WLAN,       KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
2282                 KEY_FN_F9,      KEY_FN_F10,     KEY_FN_F11,     KEY_SUSPEND,
2283
2284                 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
2285                 KEY_UNKNOWN,    /* 0x0C: FN+BACKSPACE */
2286                 KEY_UNKNOWN,    /* 0x0D: FN+INSERT */
2287                 KEY_UNKNOWN,    /* 0x0E: FN+DELETE */
2288
2289                 /* These either have to go through ACPI video, or
2290                  * act like in the IBM ThinkPads, so don't ever
2291                  * enable them by default */
2292                 KEY_RESERVED,   /* 0x0F: FN+HOME (brightness up) */
2293                 KEY_RESERVED,   /* 0x10: FN+END (brightness down) */
2294
2295                 KEY_RESERVED,   /* 0x11: FN+PGUP (thinklight toggle) */
2296
2297                 KEY_UNKNOWN,    /* 0x12: FN+PGDOWN */
2298                 KEY_ZOOM,       /* 0x13: FN+SPACE (zoom) */
2299
2300                 /* Volume: z60/z61, T60 (BIOS version?): firmware always
2301                  * react to it and reprograms the built-in *extra* mixer.
2302                  * Never map it to control another mixer by default.
2303                  *
2304                  * T60?, T61, R60?, R61: firmware and EC tries to send
2305                  * these over the regular keyboard, so these are no-ops,
2306                  * but there are still weird bugs re. MUTE, so do not
2307                  * change unless you get test reports from all Lenovo
2308                  * models.  May cause the BIOS to interfere with the
2309                  * HDA mixer.
2310                  */
2311                 KEY_RESERVED,   /* 0x14: VOLUME UP */
2312                 KEY_RESERVED,   /* 0x15: VOLUME DOWN */
2313                 KEY_RESERVED,   /* 0x16: MUTE */
2314
2315                 KEY_VENDOR,     /* 0x17: Thinkpad/AccessIBM/Lenovo */
2316
2317                 /* (assignments unknown, please report if found) */
2318                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2319                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2320         };
2321
2322 #define TPACPI_HOTKEY_MAP_LEN           ARRAY_SIZE(ibm_keycode_map)
2323 #define TPACPI_HOTKEY_MAP_SIZE          sizeof(ibm_keycode_map)
2324 #define TPACPI_HOTKEY_MAP_TYPESIZE      sizeof(ibm_keycode_map[0])
2325
2326         int res, i;
2327         int status;
2328         int hkeyv;
2329
2330         vdbg_printk(TPACPI_DBG_INIT, "initializing hotkey subdriver\n");
2331
2332         BUG_ON(!tpacpi_inputdev);
2333         BUG_ON(tpacpi_inputdev->open != NULL ||
2334                tpacpi_inputdev->close != NULL);
2335
2336         TPACPI_ACPIHANDLE_INIT(hkey);
2337         mutex_init(&hotkey_mutex);
2338
2339 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2340         mutex_init(&hotkey_thread_mutex);
2341         mutex_init(&hotkey_thread_data_mutex);
2342 #endif
2343
2344         /* hotkey not supported on 570 */
2345         tp_features.hotkey = hkey_handle != NULL;
2346
2347         vdbg_printk(TPACPI_DBG_INIT, "hotkeys are %s\n",
2348                 str_supported(tp_features.hotkey));
2349
2350         if (!tp_features.hotkey)
2351                 return 1;
2352
2353         tpacpi_disable_brightness_delay();
2354
2355         hotkey_dev_attributes = create_attr_set(13, NULL);
2356         if (!hotkey_dev_attributes)
2357                 return -ENOMEM;
2358         res = add_many_to_attr_set(hotkey_dev_attributes,
2359                         hotkey_attributes,
2360                         ARRAY_SIZE(hotkey_attributes));
2361         if (res)
2362                 goto err_exit;
2363
2364         /* mask not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
2365            A30, R30, R31, T20-22, X20-21, X22-24.  Detected by checking
2366            for HKEY interface version 0x100 */
2367         if (acpi_evalf(hkey_handle, &hkeyv, "MHKV", "qd")) {
2368                 if ((hkeyv >> 8) != 1) {
2369                         printk(TPACPI_ERR "unknown version of the "
2370                                "HKEY interface: 0x%x\n", hkeyv);
2371                         printk(TPACPI_ERR "please report this to %s\n",
2372                                TPACPI_MAIL);
2373                 } else {
2374                         /*
2375                          * MHKV 0x100 in A31, R40, R40e,
2376                          * T4x, X31, and later
2377                          */
2378                         tp_features.hotkey_mask = 1;
2379                 }
2380         }
2381
2382         vdbg_printk(TPACPI_DBG_INIT, "hotkey masks are %s\n",
2383                 str_supported(tp_features.hotkey_mask));
2384
2385         if (tp_features.hotkey_mask) {
2386                 if (!acpi_evalf(hkey_handle, &hotkey_all_mask,
2387                                 "MHKA", "qd")) {
2388                         printk(TPACPI_ERR
2389                                "missing MHKA handler, "
2390                                "please report this to %s\n",
2391                                TPACPI_MAIL);
2392                         /* FN+F12, FN+F4, FN+F3 */
2393                         hotkey_all_mask = 0x080cU;
2394                 }
2395         }
2396
2397         /* hotkey_source_mask *must* be zero for
2398          * the first hotkey_mask_get */
2399         res = hotkey_status_get(&hotkey_orig_status);
2400         if (res)
2401                 goto err_exit;
2402
2403         if (tp_features.hotkey_mask) {
2404                 res = hotkey_mask_get();
2405                 if (res)
2406                         goto err_exit;
2407
2408                 hotkey_orig_mask = hotkey_mask;
2409                 res = add_many_to_attr_set(
2410                                 hotkey_dev_attributes,
2411                                 hotkey_mask_attributes,
2412                                 ARRAY_SIZE(hotkey_mask_attributes));
2413                 if (res)
2414                         goto err_exit;
2415         }
2416
2417 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2418         if (tp_features.hotkey_mask) {
2419                 hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK
2420                                         & ~hotkey_all_mask;
2421         } else {
2422                 hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK;
2423         }
2424
2425         vdbg_printk(TPACPI_DBG_INIT,
2426                     "hotkey source mask 0x%08x, polling freq %d\n",
2427                     hotkey_source_mask, hotkey_poll_freq);
2428 #endif
2429
2430 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
2431         if (dbg_wlswemul) {
2432                 tp_features.hotkey_wlsw = 1;
2433                 printk(TPACPI_INFO
2434                         "radio switch emulation enabled\n");
2435         } else
2436 #endif
2437         /* Not all thinkpads have a hardware radio switch */
2438         if (acpi_evalf(hkey_handle, &status, "WLSW", "qd")) {
2439                 tp_features.hotkey_wlsw = 1;
2440                 printk(TPACPI_INFO
2441                         "radio switch found; radios are %s\n",
2442                         enabled(status, 0));
2443         }
2444         if (tp_features.hotkey_wlsw)
2445                 res = add_to_attr_set(hotkey_dev_attributes,
2446                                 &dev_attr_hotkey_radio_sw.attr);
2447
2448         /* For X41t, X60t, X61t Tablets... */
2449         if (!res && acpi_evalf(hkey_handle, &status, "MHKG", "qd")) {
2450                 tp_features.hotkey_tablet = 1;
2451                 printk(TPACPI_INFO
2452                         "possible tablet mode switch found; "
2453                         "ThinkPad in %s mode\n",
2454                         (status & TP_HOTKEY_TABLET_MASK)?
2455                                 "tablet" : "laptop");
2456                 res = add_to_attr_set(hotkey_dev_attributes,
2457                                 &dev_attr_hotkey_tablet_mode.attr);
2458         }
2459
2460         if (!res)
2461                 res = register_attr_set_with_sysfs(
2462                                 hotkey_dev_attributes,
2463                                 &tpacpi_pdev->dev.kobj);
2464         if (res)
2465                 goto err_exit;
2466
2467         /* Set up key map */
2468
2469         hotkey_keycode_map = kmalloc(TPACPI_HOTKEY_MAP_SIZE,
2470                                         GFP_KERNEL);
2471         if (!hotkey_keycode_map) {
2472                 printk(TPACPI_ERR
2473                         "failed to allocate memory for key map\n");
2474                 res = -ENOMEM;
2475                 goto err_exit;
2476         }
2477
2478         if (thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO) {
2479                 dbg_printk(TPACPI_DBG_INIT,
2480                            "using Lenovo default hot key map\n");
2481                 memcpy(hotkey_keycode_map, &lenovo_keycode_map,
2482                         TPACPI_HOTKEY_MAP_SIZE);
2483         } else {
2484                 dbg_printk(TPACPI_DBG_INIT,
2485                            "using IBM default hot key map\n");
2486                 memcpy(hotkey_keycode_map, &ibm_keycode_map,
2487                         TPACPI_HOTKEY_MAP_SIZE);
2488         }
2489
2490         set_bit(EV_KEY, tpacpi_inputdev->evbit);
2491         set_bit(EV_MSC, tpacpi_inputdev->evbit);
2492         set_bit(MSC_SCAN, tpacpi_inputdev->mscbit);
2493         tpacpi_inputdev->keycodesize = TPACPI_HOTKEY_MAP_TYPESIZE;
2494         tpacpi_inputdev->keycodemax = TPACPI_HOTKEY_MAP_LEN;
2495         tpacpi_inputdev->keycode = hotkey_keycode_map;
2496         for (i = 0; i < TPACPI_HOTKEY_MAP_LEN; i++) {
2497                 if (hotkey_keycode_map[i] != KEY_RESERVED) {
2498                         set_bit(hotkey_keycode_map[i],
2499                                 tpacpi_inputdev->keybit);
2500                 } else {
2501                         if (i < sizeof(hotkey_reserved_mask)*8)
2502                                 hotkey_reserved_mask |= 1 << i;
2503                 }
2504         }
2505
2506         if (tp_features.hotkey_wlsw) {
2507                 set_bit(EV_SW, tpacpi_inputdev->evbit);
2508                 set_bit(SW_RFKILL_ALL, tpacpi_inputdev->swbit);
2509         }
2510         if (tp_features.hotkey_tablet) {
2511                 set_bit(EV_SW, tpacpi_inputdev->evbit);
2512                 set_bit(SW_TABLET_MODE, tpacpi_inputdev->swbit);
2513         }
2514
2515         /* Do not issue duplicate brightness change events to
2516          * userspace */
2517         if (!tp_features.bright_acpimode)
2518                 /* update bright_acpimode... */
2519                 tpacpi_check_std_acpi_brightness_support();
2520
2521         if (tp_features.bright_acpimode) {
2522                 printk(TPACPI_INFO
2523                        "This ThinkPad has standard ACPI backlight "
2524                        "brightness control, supported by the ACPI "
2525                        "video driver\n");
2526                 printk(TPACPI_NOTICE
2527                        "Disabling thinkpad-acpi brightness events "
2528                        "by default...\n");
2529
2530                 /* The hotkey_reserved_mask change below is not
2531                  * necessary while the keys are at KEY_RESERVED in the
2532                  * default map, but better safe than sorry, leave it
2533                  * here as a marker of what we have to do, especially
2534                  * when we finally become able to set this at runtime
2535                  * on response to X.org requests */
2536                 hotkey_reserved_mask |=
2537                         (1 << TP_ACPI_HOTKEYSCAN_FNHOME)
2538                         | (1 << TP_ACPI_HOTKEYSCAN_FNEND);
2539         }
2540
2541         dbg_printk(TPACPI_DBG_INIT, "enabling hot key handling\n");
2542         res = hotkey_status_set(1);
2543         if (res) {
2544                 hotkey_exit();
2545                 return res;
2546         }
2547         res = hotkey_mask_set(((hotkey_all_mask | hotkey_source_mask)
2548                                 & ~hotkey_reserved_mask)
2549                                 | hotkey_orig_mask);
2550         if (res < 0 && res != -ENXIO) {
2551                 hotkey_exit();
2552                 return res;
2553         }
2554
2555         dbg_printk(TPACPI_DBG_INIT,
2556                         "legacy hot key reporting over procfs %s\n",
2557                         (hotkey_report_mode < 2) ?
2558                                 "enabled" : "disabled");
2559
2560         tpacpi_inputdev->open = &hotkey_inputdev_open;
2561         tpacpi_inputdev->close = &hotkey_inputdev_close;
2562
2563         hotkey_poll_setup_safe(1);
2564         tpacpi_send_radiosw_update();
2565         tpacpi_input_send_tabletsw();
2566
2567         return 0;
2568
2569 err_exit:
2570         delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
2571         hotkey_dev_attributes = NULL;
2572
2573         return (res < 0)? res : 1;
2574 }
2575
2576 static bool hotkey_notify_hotkey(const u32 hkey,
2577                                  bool *send_acpi_ev,
2578                                  bool *ignore_acpi_ev)
2579 {
2580         /* 0x1000-0x1FFF: key presses */
2581         unsigned int scancode = hkey & 0xfff;
2582         *send_acpi_ev = true;
2583         *ignore_acpi_ev = false;
2584
2585         if (scancode > 0 && scancode < 0x21) {
2586                 scancode--;
2587                 if (!(hotkey_source_mask & (1 << scancode))) {
2588                         tpacpi_input_send_key(scancode);
2589                         *send_acpi_ev = false;
2590                 } else {
2591                         *ignore_acpi_ev = true;
2592                 }
2593                 return true;
2594         }
2595         return false;
2596 }
2597
2598 static bool hotkey_notify_wakeup(const u32 hkey,
2599                                  bool *send_acpi_ev,
2600                                  bool *ignore_acpi_ev)
2601 {
2602         /* 0x2000-0x2FFF: Wakeup reason */
2603         *send_acpi_ev = true;
2604         *ignore_acpi_ev = false;
2605
2606         switch (hkey) {
2607         case 0x2304: /* suspend, undock */
2608         case 0x2404: /* hibernation, undock */
2609                 hotkey_wakeup_reason = TP_ACPI_WAKEUP_UNDOCK;
2610                 *ignore_acpi_ev = true;
2611                 break;
2612
2613         case 0x2305: /* suspend, bay eject */
2614         case 0x2405: /* hibernation, bay eject */
2615                 hotkey_wakeup_reason = TP_ACPI_WAKEUP_BAYEJ;
2616                 *ignore_acpi_ev = true;
2617                 break;
2618
2619         case 0x2313: /* Battery on critical low level (S3) */
2620         case 0x2413: /* Battery on critical low level (S4) */
2621                 printk(TPACPI_ALERT
2622                         "EMERGENCY WAKEUP: battery almost empty\n");
2623                 /* how to auto-heal: */
2624                 /* 2313: woke up from S3, go to S4/S5 */
2625                 /* 2413: woke up from S4, go to S5 */
2626                 break;
2627
2628         default:
2629                 return false;
2630         }
2631
2632         if (hotkey_wakeup_reason != TP_ACPI_WAKEUP_NONE) {
2633                 printk(TPACPI_INFO
2634                        "woke up due to a hot-unplug "
2635                        "request...\n");
2636                 hotkey_wakeup_reason_notify_change();
2637         }
2638         return true;
2639 }
2640
2641 static bool hotkey_notify_usrevent(const u32 hkey,
2642                                  bool *send_acpi_ev,
2643                                  bool *ignore_acpi_ev)
2644 {
2645         /* 0x5000-0x5FFF: human interface helpers */
2646         *send_acpi_ev = true;
2647         *ignore_acpi_ev = false;
2648
2649         switch (hkey) {
2650         case 0x5010: /* Lenovo new BIOS: brightness changed */
2651         case 0x500b: /* X61t: tablet pen inserted into bay */
2652         case 0x500c: /* X61t: tablet pen removed from bay */
2653                 return true;
2654
2655         case 0x5009: /* X41t-X61t: swivel up (tablet mode) */
2656         case 0x500a: /* X41t-X61t: swivel down (normal mode) */
2657                 tpacpi_input_send_tabletsw();
2658                 hotkey_tablet_mode_notify_change();
2659                 *send_acpi_ev = false;
2660                 return true;
2661
2662         case 0x5001:
2663         case 0x5002:
2664                 /* LID switch events.  Do not propagate */
2665                 *ignore_acpi_ev = true;
2666                 return true;
2667
2668         default:
2669                 return false;
2670         }
2671 }
2672
2673 static bool hotkey_notify_thermal(const u32 hkey,
2674                                  bool *send_acpi_ev,
2675                                  bool *ignore_acpi_ev)
2676 {
2677         /* 0x6000-0x6FFF: thermal alarms */
2678         *send_acpi_ev = true;
2679         *ignore_acpi_ev = false;
2680
2681         switch (hkey) {
2682         case 0x6011:
2683                 printk(TPACPI_CRIT
2684                         "THERMAL ALARM: battery is too hot!\n");
2685                 /* recommended action: warn user through gui */
2686                 return true;
2687         case 0x6012:
2688                 printk(TPACPI_ALERT
2689                         "THERMAL EMERGENCY: battery is extremely hot!\n");
2690                 /* recommended action: immediate sleep/hibernate */
2691                 return true;
2692         case 0x6021:
2693                 printk(TPACPI_CRIT
2694                         "THERMAL ALARM: "
2695                         "a sensor reports something is too hot!\n");
2696                 /* recommended action: warn user through gui, that */
2697                 /* some internal component is too hot */
2698                 return true;
2699         case 0x6022:
2700                 printk(TPACPI_ALERT
2701                         "THERMAL EMERGENCY: "
2702                         "a sensor reports something is extremely hot!\n");
2703                 /* recommended action: immediate sleep/hibernate */
2704                 return true;
2705         case 0x6030:
2706                 printk(TPACPI_INFO
2707                         "EC reports that Thermal Table has changed\n");
2708                 /* recommended action: do nothing, we don't have
2709                  * Lenovo ATM information */
2710                 return true;
2711         default:
2712                 printk(TPACPI_ALERT
2713                          "THERMAL ALERT: unknown thermal alarm received\n");
2714                 return false;
2715         }
2716 }
2717
2718 static void hotkey_notify(struct ibm_struct *ibm, u32 event)
2719 {
2720         u32 hkey;
2721         bool send_acpi_ev;
2722         bool ignore_acpi_ev;
2723         bool known_ev;
2724
2725         if (event != 0x80) {
2726                 printk(TPACPI_ERR
2727                        "unknown HKEY notification event %d\n", event);
2728                 /* forward it to userspace, maybe it knows how to handle it */
2729                 acpi_bus_generate_netlink_event(
2730                                         ibm->acpi->device->pnp.device_class,
2731                                         dev_name(&ibm->acpi->device->dev),
2732                                         event, 0);
2733                 return;
2734         }
2735
2736         while (1) {
2737                 if (!acpi_evalf(hkey_handle, &hkey, "MHKP", "d")) {
2738                         printk(TPACPI_ERR "failed to retrieve HKEY event\n");
2739                         return;
2740                 }
2741
2742                 if (hkey == 0) {
2743                         /* queue empty */
2744                         return;
2745                 }
2746
2747                 send_acpi_ev = true;
2748                 ignore_acpi_ev = false;
2749
2750                 switch (hkey >> 12) {
2751                 case 1:
2752                         /* 0x1000-0x1FFF: key presses */
2753                         known_ev = hotkey_notify_hotkey(hkey, &send_acpi_ev,
2754                                                  &ignore_acpi_ev);
2755                         break;
2756                 case 2:
2757                         /* 0x2000-0x2FFF: Wakeup reason */
2758                         known_ev = hotkey_notify_wakeup(hkey, &send_acpi_ev,
2759                                                  &ignore_acpi_ev);
2760                         break;
2761                 case 3:
2762                         /* 0x3000-0x3FFF: bay-related wakeups */
2763                         if (hkey == 0x3003) {
2764                                 hotkey_autosleep_ack = 1;
2765                                 printk(TPACPI_INFO
2766                                        "bay ejected\n");
2767                                 hotkey_wakeup_hotunplug_complete_notify_change();
2768                                 known_ev = true;
2769                         } else {
2770                                 known_ev = false;
2771                         }
2772                         break;
2773                 case 4:
2774                         /* 0x4000-0x4FFF: dock-related wakeups */
2775                         if (hkey == 0x4003) {
2776                                 hotkey_autosleep_ack = 1;
2777                                 printk(TPACPI_INFO
2778                                        "undocked\n");
2779                                 hotkey_wakeup_hotunplug_complete_notify_change();
2780                                 known_ev = true;
2781                         } else {
2782                                 known_ev = false;
2783                         }
2784                         break;
2785                 case 5:
2786                         /* 0x5000-0x5FFF: human interface helpers */
2787                         known_ev = hotkey_notify_usrevent(hkey, &send_acpi_ev,
2788                                                  &ignore_acpi_ev);
2789                         break;
2790                 case 6:
2791                         /* 0x6000-0x6FFF: thermal alarms */
2792                         known_ev = hotkey_notify_thermal(hkey, &send_acpi_ev,
2793                                                  &ignore_acpi_ev);
2794                         break;
2795                 case 7:
2796                         /* 0x7000-0x7FFF: misc */
2797                         if (tp_features.hotkey_wlsw && hkey == 0x7000) {
2798                                 tpacpi_send_radiosw_update();
2799                                 send_acpi_ev = 0;
2800                                 known_ev = true;
2801                                 break;
2802                         }
2803                         /* fallthrough to default */
2804                 default:
2805                         known_ev = false;
2806                 }
2807                 if (!known_ev) {
2808                         printk(TPACPI_NOTICE
2809                                "unhandled HKEY event 0x%04x\n", hkey);
2810                         printk(TPACPI_NOTICE
2811                                "please report the conditions when this "
2812                                "event happened to %s\n", TPACPI_MAIL);
2813                 }
2814
2815                 /* Legacy events */
2816                 if (!ignore_acpi_ev &&
2817                     (send_acpi_ev || hotkey_report_mode < 2)) {
2818                         acpi_bus_generate_proc_event(ibm->acpi->device,
2819                                                      event, hkey);
2820                 }
2821
2822                 /* netlink events */
2823                 if (!ignore_acpi_ev && send_acpi_ev) {
2824                         acpi_bus_generate_netlink_event(
2825                                         ibm->acpi->device->pnp.device_class,
2826                                         dev_name(&ibm->acpi->device->dev),
2827                                         event, hkey);
2828                 }
2829         }
2830 }
2831
2832 static void hotkey_suspend(pm_message_t state)
2833 {
2834         /* Do these on suspend, we get the events on early resume! */
2835         hotkey_wakeup_reason = TP_ACPI_WAKEUP_NONE;
2836         hotkey_autosleep_ack = 0;
2837 }
2838
2839 static void hotkey_resume(void)
2840 {
2841         tpacpi_disable_brightness_delay();
2842
2843         if (hotkey_mask_get())
2844                 printk(TPACPI_ERR
2845                        "error while trying to read hot key mask "
2846                        "from firmware\n");
2847         tpacpi_send_radiosw_update();
2848         hotkey_tablet_mode_notify_change();
2849         hotkey_wakeup_reason_notify_change();
2850         hotkey_wakeup_hotunplug_complete_notify_change();
2851         hotkey_poll_setup_safe(0);
2852 }
2853
2854 /* procfs -------------------------------------------------------------- */
2855 static int hotkey_read(char *p)
2856 {
2857         int res, status;
2858         int len = 0;
2859
2860         if (!tp_features.hotkey) {
2861                 len += sprintf(p + len, "status:\t\tnot supported\n");
2862                 return len;
2863         }
2864
2865         if (mutex_lock_killable(&hotkey_mutex))
2866                 return -ERESTARTSYS;
2867         res = hotkey_status_get(&status);
2868         if (!res)
2869                 res = hotkey_mask_get();
2870         mutex_unlock(&hotkey_mutex);
2871         if (res)
2872                 return res;
2873
2874         len += sprintf(p + len, "status:\t\t%s\n", enabled(status, 0));
2875         if (tp_features.hotkey_mask) {
2876                 len += sprintf(p + len, "mask:\t\t0x%08x\n", hotkey_mask);
2877                 len += sprintf(p + len,
2878                                "commands:\tenable, disable, reset, <mask>\n");
2879         } else {
2880                 len += sprintf(p + len, "mask:\t\tnot supported\n");
2881                 len += sprintf(p + len, "commands:\tenable, disable, reset\n");
2882         }
2883
2884         return len;
2885 }
2886
2887 static int hotkey_write(char *buf)
2888 {
2889         int res, status;
2890         u32 mask;
2891         char *cmd;
2892
2893         if (!tp_features.hotkey)
2894                 return -ENODEV;
2895
2896         if (mutex_lock_killable(&hotkey_mutex))
2897                 return -ERESTARTSYS;
2898
2899         status = -1;
2900         mask = hotkey_mask;
2901
2902         res = 0;
2903         while ((cmd = next_cmd(&buf))) {
2904                 if (strlencmp(cmd, "enable") == 0) {
2905                         status = 1;
2906                 } else if (strlencmp(cmd, "disable") == 0) {
2907                         status = 0;
2908                 } else if (strlencmp(cmd, "reset") == 0) {
2909                         status = hotkey_orig_status;
2910                         mask = hotkey_orig_mask;
2911                 } else if (sscanf(cmd, "0x%x", &mask) == 1) {
2912                         /* mask set */
2913                 } else if (sscanf(cmd, "%x", &mask) == 1) {
2914                         /* mask set */
2915                 } else {
2916                         res = -EINVAL;
2917                         goto errexit;
2918                 }
2919         }
2920         if (status != -1)
2921                 res = hotkey_status_set(status);
2922
2923         if (!res && mask != hotkey_mask)
2924                 res = hotkey_mask_set(mask);
2925
2926 errexit:
2927         mutex_unlock(&hotkey_mutex);
2928         return res;
2929 }
2930
2931 static const struct acpi_device_id ibm_htk_device_ids[] = {
2932         {TPACPI_ACPI_HKEY_HID, 0},
2933         {"", 0},
2934 };
2935
2936 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver = {
2937         .hid = ibm_htk_device_ids,
2938         .notify = hotkey_notify,
2939         .handle = &hkey_handle,
2940         .type = ACPI_DEVICE_NOTIFY,
2941 };
2942
2943 static struct ibm_struct hotkey_driver_data = {
2944         .name = "hotkey",
2945         .read = hotkey_read,
2946         .write = hotkey_write,
2947         .exit = hotkey_exit,
2948         .resume = hotkey_resume,
2949         .suspend = hotkey_suspend,
2950         .acpi = &ibm_hotkey_acpidriver,
2951 };
2952
2953 /*************************************************************************
2954  * Bluetooth subdriver
2955  */
2956
2957 enum {
2958         /* ACPI GBDC/SBDC bits */
2959         TP_ACPI_BLUETOOTH_HWPRESENT     = 0x01, /* Bluetooth hw available */
2960         TP_ACPI_BLUETOOTH_RADIOSSW      = 0x02, /* Bluetooth radio enabled */
2961         TP_ACPI_BLUETOOTH_RESUMECTRL    = 0x04, /* Bluetooth state at resume:
2962                                                    off / last state */
2963 };
2964
2965 enum {
2966         /* ACPI \BLTH commands */
2967         TP_ACPI_BLTH_GET_ULTRAPORT_ID   = 0x00, /* Get Ultraport BT ID */
2968         TP_ACPI_BLTH_GET_PWR_ON_RESUME  = 0x01, /* Get power-on-resume state */
2969         TP_ACPI_BLTH_PWR_ON_ON_RESUME   = 0x02, /* Resume powered on */
2970         TP_ACPI_BLTH_PWR_OFF_ON_RESUME  = 0x03, /* Resume powered off */
2971         TP_ACPI_BLTH_SAVE_STATE         = 0x05, /* Save state for S4/S5 */
2972 };
2973
2974 static struct rfkill *tpacpi_bluetooth_rfkill;
2975
2976 static void bluetooth_suspend(pm_message_t state)
2977 {
2978         /* Try to make sure radio will resume powered off */
2979         acpi_evalf(NULL, NULL, "\\BLTH", "vd",
2980                    TP_ACPI_BLTH_PWR_OFF_ON_RESUME);
2981 }
2982
2983 static int bluetooth_get_radiosw(void)
2984 {
2985         int status;
2986
2987         if (!tp_features.bluetooth)
2988                 return -ENODEV;
2989
2990         /* WLSW overrides bluetooth in firmware/hardware, reflect that */
2991         if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&status) && !status)
2992                 return RFKILL_STATE_HARD_BLOCKED;
2993
2994 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
2995         if (dbg_bluetoothemul)
2996                 return (tpacpi_bluetooth_emulstate) ?
2997                         RFKILL_STATE_UNBLOCKED : RFKILL_STATE_SOFT_BLOCKED;
2998 #endif
2999
3000         if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
3001                 return -EIO;
3002
3003         return ((status & TP_ACPI_BLUETOOTH_RADIOSSW) != 0) ?
3004                 RFKILL_STATE_UNBLOCKED : RFKILL_STATE_SOFT_BLOCKED;
3005 }
3006
3007 static void bluetooth_update_rfk(void)
3008 {
3009         int status;
3010
3011         if (!tpacpi_bluetooth_rfkill)
3012                 return;
3013
3014         status = bluetooth_get_radiosw();
3015         if (status < 0)
3016                 return;
3017         rfkill_force_state(tpacpi_bluetooth_rfkill, status);
3018 }
3019
3020 static int bluetooth_set_radiosw(int radio_on, int update_rfk)
3021 {
3022         int status;
3023
3024         if (!tp_features.bluetooth)
3025                 return -ENODEV;
3026
3027         /* WLSW overrides bluetooth in firmware/hardware, but there is no
3028          * reason to risk weird behaviour. */
3029         if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&status) && !status
3030             && radio_on)
3031                 return -EPERM;
3032
3033 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3034         if (dbg_bluetoothemul) {
3035                 tpacpi_bluetooth_emulstate = !!radio_on;
3036                 if (update_rfk)
3037                         bluetooth_update_rfk();
3038                 return 0;
3039         }
3040 #endif
3041
3042         /* We make sure to keep TP_ACPI_BLUETOOTH_RESUMECTRL off */
3043         if (radio_on)
3044                 status = TP_ACPI_BLUETOOTH_RADIOSSW;
3045         else
3046                 status = 0;
3047         if (!acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status))
3048                 return -EIO;
3049
3050         if (update_rfk)
3051                 bluetooth_update_rfk();
3052
3053         return 0;
3054 }
3055
3056 /* sysfs bluetooth enable ---------------------------------------------- */
3057 static ssize_t bluetooth_enable_show(struct device *dev,
3058                            struct device_attribute *attr,
3059                            char *buf)
3060 {
3061         int status;
3062
3063         status = bluetooth_get_radiosw();
3064         if (status < 0)
3065                 return status;
3066
3067         return snprintf(buf, PAGE_SIZE, "%d\n",
3068                         (status == RFKILL_STATE_UNBLOCKED) ? 1 : 0);
3069 }
3070
3071 static ssize_t bluetooth_enable_store(struct device *dev,
3072                             struct device_attribute *attr,
3073                             const char *buf, size_t count)
3074 {
3075         unsigned long t;
3076         int res;
3077
3078         if (parse_strtoul(buf, 1, &t))
3079                 return -EINVAL;
3080
3081         res = bluetooth_set_radiosw(t, 1);
3082
3083         return (res) ? res : count;
3084 }
3085
3086 static struct device_attribute dev_attr_bluetooth_enable =
3087         __ATTR(bluetooth_enable, S_IWUSR | S_IRUGO,
3088                 bluetooth_enable_show, bluetooth_enable_store);
3089
3090 /* --------------------------------------------------------------------- */
3091
3092 static struct attribute *bluetooth_attributes[] = {
3093         &dev_attr_bluetooth_enable.attr,
3094         NULL
3095 };
3096
3097 static const struct attribute_group bluetooth_attr_group = {
3098         .attrs = bluetooth_attributes,
3099 };
3100
3101 static int tpacpi_bluetooth_rfk_get(void *data, enum rfkill_state *state)
3102 {
3103         int bts = bluetooth_get_radiosw();
3104
3105         if (bts < 0)
3106                 return bts;
3107
3108         *state = bts;
3109         return 0;
3110 }
3111
3112 static int tpacpi_bluetooth_rfk_set(void *data, enum rfkill_state state)
3113 {
3114         return bluetooth_set_radiosw((state == RFKILL_STATE_UNBLOCKED), 0);
3115 }
3116
3117 static void bluetooth_shutdown(void)
3118 {
3119         /* Order firmware to save current state to NVRAM */
3120         if (!acpi_evalf(NULL, NULL, "\\BLTH", "vd",
3121                         TP_ACPI_BLTH_SAVE_STATE))
3122                 printk(TPACPI_NOTICE
3123                         "failed to save bluetooth state to NVRAM\n");
3124 }
3125
3126 static void bluetooth_exit(void)
3127 {
3128         bluetooth_shutdown();
3129
3130         if (tpacpi_bluetooth_rfkill)
3131                 rfkill_unregister(tpacpi_bluetooth_rfkill);
3132
3133         sysfs_remove_group(&tpacpi_pdev->dev.kobj,
3134                         &bluetooth_attr_group);
3135 }
3136
3137 static int __init bluetooth_init(struct ibm_init_struct *iibm)
3138 {
3139         int res;
3140         int status = 0;
3141
3142         vdbg_printk(TPACPI_DBG_INIT, "initializing bluetooth subdriver\n");
3143
3144         TPACPI_ACPIHANDLE_INIT(hkey);
3145
3146         /* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
3147            G4x, R30, R31, R40e, R50e, T20-22, X20-21 */
3148         tp_features.bluetooth = hkey_handle &&
3149             acpi_evalf(hkey_handle, &status, "GBDC", "qd");
3150
3151         vdbg_printk(TPACPI_DBG_INIT, "bluetooth is %s, status 0x%02x\n",
3152                 str_supported(tp_features.bluetooth),
3153                 status);
3154
3155 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3156         if (dbg_bluetoothemul) {
3157                 tp_features.bluetooth = 1;
3158                 printk(TPACPI_INFO
3159                         "bluetooth switch emulation enabled\n");
3160         } else
3161 #endif
3162         if (tp_features.bluetooth &&
3163             !(status & TP_ACPI_BLUETOOTH_HWPRESENT)) {
3164                 /* no bluetooth hardware present in system */
3165                 tp_features.bluetooth = 0;
3166                 dbg_printk(TPACPI_DBG_INIT,
3167                            "bluetooth hardware not installed\n");
3168         }
3169
3170         if (!tp_features.bluetooth)
3171                 return 1;
3172
3173         res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
3174                                 &bluetooth_attr_group);
3175         if (res)
3176                 return res;
3177
3178         res = tpacpi_new_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID,
3179                                 &tpacpi_bluetooth_rfkill,
3180                                 RFKILL_TYPE_BLUETOOTH,
3181                                 "tpacpi_bluetooth_sw",
3182                                 true,
3183                                 tpacpi_bluetooth_rfk_set,
3184                                 tpacpi_bluetooth_rfk_get);
3185         if (res) {
3186                 bluetooth_exit();
3187                 return res;
3188         }
3189
3190         return 0;
3191 }
3192
3193 /* procfs -------------------------------------------------------------- */
3194 static int bluetooth_read(char *p)
3195 {
3196         int len = 0;
3197         int status = bluetooth_get_radiosw();
3198
3199         if (!tp_features.bluetooth)
3200                 len += sprintf(p + len, "status:\t\tnot supported\n");
3201         else {
3202                 len += sprintf(p + len, "status:\t\t%s\n",
3203                                 (status == RFKILL_STATE_UNBLOCKED) ?
3204                                         "enabled" : "disabled");
3205                 len += sprintf(p + len, "commands:\tenable, disable\n");
3206         }
3207
3208         return len;
3209 }
3210
3211 static int bluetooth_write(char *buf)
3212 {
3213         char *cmd;
3214
3215         if (!tp_features.bluetooth)
3216                 return -ENODEV;
3217
3218         while ((cmd = next_cmd(&buf))) {
3219                 if (strlencmp(cmd, "enable") == 0) {
3220                         bluetooth_set_radiosw(1, 1);
3221                 } else if (strlencmp(cmd, "disable") == 0) {
3222                         bluetooth_set_radiosw(0, 1);
3223                 } else
3224                         return -EINVAL;
3225         }
3226
3227         return 0;
3228 }
3229
3230 static struct ibm_struct bluetooth_driver_data = {
3231         .name = "bluetooth",
3232         .read = bluetooth_read,
3233         .write = bluetooth_write,
3234         .exit = bluetooth_exit,
3235         .suspend = bluetooth_suspend,
3236         .shutdown = bluetooth_shutdown,
3237 };
3238
3239 /*************************************************************************
3240  * Wan subdriver
3241  */
3242
3243 enum {
3244         /* ACPI GWAN/SWAN bits */
3245         TP_ACPI_WANCARD_HWPRESENT       = 0x01, /* Wan hw available */
3246         TP_ACPI_WANCARD_RADIOSSW        = 0x02, /* Wan radio enabled */
3247         TP_ACPI_WANCARD_RESUMECTRL      = 0x04, /* Wan state at resume:
3248                                                    off / last state */
3249 };
3250
3251 static struct rfkill *tpacpi_wan_rfkill;
3252
3253 static void wan_suspend(pm_message_t state)
3254 {
3255         /* Try to make sure radio will resume powered off */
3256         acpi_evalf(NULL, NULL, "\\WGSV", "qvd",
3257                    TP_ACPI_WGSV_PWR_OFF_ON_RESUME);
3258 }
3259
3260 static int wan_get_radiosw(void)
3261 {
3262         int status;
3263
3264         if (!tp_features.wan)
3265                 return -ENODEV;
3266
3267         /* WLSW overrides WWAN in firmware/hardware, reflect that */
3268         if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&status) && !status)
3269                 return RFKILL_STATE_HARD_BLOCKED;
3270
3271 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3272         if (dbg_wwanemul)
3273                 return (tpacpi_wwan_emulstate) ?
3274                         RFKILL_STATE_UNBLOCKED : RFKILL_STATE_SOFT_BLOCKED;
3275 #endif
3276
3277         if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
3278                 return -EIO;
3279
3280         return ((status & TP_ACPI_WANCARD_RADIOSSW) != 0) ?
3281                 RFKILL_STATE_UNBLOCKED : RFKILL_STATE_SOFT_BLOCKED;
3282 }
3283
3284 static void wan_update_rfk(void)
3285 {
3286         int status;
3287
3288         if (!tpacpi_wan_rfkill)
3289                 return;
3290
3291         status = wan_get_radiosw();
3292         if (status < 0)
3293                 return;
3294         rfkill_force_state(tpacpi_wan_rfkill, status);
3295 }
3296
3297 static int wan_set_radiosw(int radio_on, int update_rfk)
3298 {
3299         int status;
3300
3301         if (!tp_features.wan)
3302                 return -ENODEV;
3303
3304         /* WLSW overrides bluetooth in firmware/hardware, but there is no
3305          * reason to risk weird behaviour. */
3306         if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&status) && !status
3307             && radio_on)
3308                 return -EPERM;
3309
3310 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3311         if (dbg_wwanemul) {
3312                 tpacpi_wwan_emulstate = !!radio_on;
3313                 if (update_rfk)
3314                         wan_update_rfk();
3315                 return 0;
3316         }
3317 #endif
3318
3319         /* We make sure to keep TP_ACPI_WANCARD_RESUMECTRL off */
3320         if (radio_on)
3321                 status = TP_ACPI_WANCARD_RADIOSSW;
3322         else
3323                 status = 0;
3324         if (!acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status))
3325                 return -EIO;
3326
3327         if (update_rfk)
3328                 wan_update_rfk();
3329
3330         return 0;
3331 }
3332
3333 /* sysfs wan enable ---------------------------------------------------- */
3334 static ssize_t wan_enable_show(struct device *dev,
3335                            struct device_attribute *attr,
3336                            char *buf)
3337 {
3338         int status;
3339
3340         status = wan_get_radiosw();
3341         if (status < 0)
3342                 return status;
3343
3344         return snprintf(buf, PAGE_SIZE, "%d\n",
3345                         (status == RFKILL_STATE_UNBLOCKED) ? 1 : 0);
3346 }
3347
3348 static ssize_t wan_enable_store(struct device *dev,
3349                             struct device_attribute *attr,
3350                             const char *buf, size_t count)
3351 {
3352         unsigned long t;
3353         int res;
3354
3355         if (parse_strtoul(buf, 1, &t))
3356                 return -EINVAL;
3357
3358         res = wan_set_radiosw(t, 1);
3359
3360         return (res) ? res : count;
3361 }
3362
3363 static struct device_attribute dev_attr_wan_enable =
3364         __ATTR(wwan_enable, S_IWUSR | S_IRUGO,
3365                 wan_enable_show, wan_enable_store);
3366
3367 /* --------------------------------------------------------------------- */
3368
3369 static struct attribute *wan_attributes[] = {
3370         &dev_attr_wan_enable.attr,
3371         NULL
3372 };
3373
3374 static const struct attribute_group wan_attr_group = {
3375         .attrs = wan_attributes,
3376 };
3377
3378 static int tpacpi_wan_rfk_get(void *data, enum rfkill_state *state)
3379 {
3380         int wans = wan_get_radiosw();
3381
3382         if (wans < 0)
3383                 return wans;
3384
3385         *state = wans;
3386         return 0;
3387 }
3388
3389 static int tpacpi_wan_rfk_set(void *data, enum rfkill_state state)
3390 {
3391         return wan_set_radiosw((state == RFKILL_STATE_UNBLOCKED), 0);
3392 }
3393
3394 static void wan_shutdown(void)
3395 {
3396         /* Order firmware to save current state to NVRAM */
3397         if (!acpi_evalf(NULL, NULL, "\\WGSV", "vd",
3398                         TP_ACPI_WGSV_SAVE_STATE))
3399                 printk(TPACPI_NOTICE
3400                         "failed to save WWAN state to NVRAM\n");
3401 }
3402
3403 static void wan_exit(void)
3404 {
3405         wan_shutdown();
3406
3407         if (tpacpi_wan_rfkill)
3408                 rfkill_unregister(tpacpi_wan_rfkill);
3409
3410         sysfs_remove_group(&tpacpi_pdev->dev.kobj,
3411                 &wan_attr_group);
3412 }
3413
3414 static int __init wan_init(struct ibm_init_struct *iibm)
3415 {
3416         int res;
3417         int status = 0;
3418
3419         vdbg_printk(TPACPI_DBG_INIT, "initializing wan subdriver\n");
3420
3421         TPACPI_ACPIHANDLE_INIT(hkey);
3422
3423         tp_features.wan = hkey_handle &&
3424             acpi_evalf(hkey_handle, &status, "GWAN", "qd");
3425
3426         vdbg_printk(TPACPI_DBG_INIT, "wan is %s, status 0x%02x\n",
3427                 str_supported(tp_features.wan),
3428                 status);
3429
3430 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3431         if (dbg_wwanemul) {
3432                 tp_features.wan = 1;
3433                 printk(TPACPI_INFO
3434                         "wwan switch emulation enabled\n");
3435         } else
3436 #endif
3437         if (tp_features.wan &&
3438             !(status & TP_ACPI_WANCARD_HWPRESENT)) {
3439                 /* no wan hardware present in system */
3440                 tp_features.wan = 0;
3441                 dbg_printk(TPACPI_DBG_INIT,
3442                            "wan hardware not installed\n");
3443         }
3444
3445         if (!tp_features.wan)
3446                 return 1;
3447
3448         res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
3449                                 &wan_attr_group);
3450         if (res)
3451                 return res;
3452
3453         res = tpacpi_new_rfkill(TPACPI_RFK_WWAN_SW_ID,
3454                                 &tpacpi_wan_rfkill,
3455                                 RFKILL_TYPE_WWAN,
3456                                 "tpacpi_wwan_sw",
3457                                 true,
3458                                 tpacpi_wan_rfk_set,
3459                                 tpacpi_wan_rfk_get);
3460         if (res) {
3461                 wan_exit();
3462                 return res;
3463         }
3464
3465         return 0;
3466 }
3467
3468 /* procfs -------------------------------------------------------------- */
3469 static int wan_read(char *p)
3470 {
3471         int len = 0;
3472         int status = wan_get_radiosw();
3473
3474         if (!tp_features.wan)
3475                 len += sprintf(p + len, "status:\t\tnot supported\n");
3476         else {
3477                 len += sprintf(p + len, "status:\t\t%s\n",
3478                                 (status == RFKILL_STATE_UNBLOCKED) ?
3479                                         "enabled" : "disabled");
3480                 len += sprintf(p + len, "commands:\tenable, disable\n");
3481         }
3482
3483         return len;
3484 }
3485
3486 static int wan_write(char *buf)
3487 {
3488         char *cmd;
3489
3490         if (!tp_features.wan)
3491                 return -ENODEV;
3492
3493         while ((cmd = next_cmd(&buf))) {
3494                 if (strlencmp(cmd, "enable") == 0) {
3495                         wan_set_radiosw(1, 1);
3496                 } else if (strlencmp(cmd, "disable") == 0) {
3497                         wan_set_radiosw(0, 1);
3498                 } else
3499                         return -EINVAL;
3500         }
3501
3502         return 0;
3503 }
3504
3505 static struct ibm_struct wan_driver_data = {
3506         .name = "wan",
3507         .read = wan_read,
3508         .write = wan_write,
3509         .exit = wan_exit,
3510         .suspend = wan_suspend,
3511         .shutdown = wan_shutdown,
3512 };
3513
3514 /*************************************************************************
3515  * UWB subdriver
3516  */
3517
3518 enum {
3519         /* ACPI GUWB/SUWB bits */
3520         TP_ACPI_UWB_HWPRESENT   = 0x01, /* UWB hw available */
3521         TP_ACPI_UWB_RADIOSSW    = 0x02, /* UWB radio enabled */
3522 };
3523
3524 static struct rfkill *tpacpi_uwb_rfkill;
3525
3526 static int uwb_get_radiosw(void)
3527 {
3528         int status;
3529
3530         if (!tp_features.uwb)
3531                 return -ENODEV;
3532
3533         /* WLSW overrides UWB in firmware/hardware, reflect that */
3534         if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&status) && !status)
3535                 return RFKILL_STATE_HARD_BLOCKED;
3536
3537 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3538         if (dbg_uwbemul)
3539                 return (tpacpi_uwb_emulstate) ?
3540                         RFKILL_STATE_UNBLOCKED : RFKILL_STATE_SOFT_BLOCKED;
3541 #endif
3542
3543         if (!acpi_evalf(hkey_handle, &status, "GUWB", "d"))
3544                 return -EIO;
3545
3546         return ((status & TP_ACPI_UWB_RADIOSSW) != 0) ?
3547                 RFKILL_STATE_UNBLOCKED : RFKILL_STATE_SOFT_BLOCKED;
3548 }
3549
3550 static void uwb_update_rfk(void)
3551 {
3552         int status;
3553
3554         if (!tpacpi_uwb_rfkill)
3555                 return;
3556
3557         status = uwb_get_radiosw();
3558         if (status < 0)
3559                 return;
3560         rfkill_force_state(tpacpi_uwb_rfkill, status);
3561 }
3562
3563 static int uwb_set_radiosw(int radio_on, int update_rfk)
3564 {
3565         int status;
3566
3567         if (!tp_features.uwb)
3568                 return -ENODEV;
3569
3570         /* WLSW overrides UWB in firmware/hardware, but there is no
3571          * reason to risk weird behaviour. */
3572         if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&status) && !status
3573             && radio_on)
3574                 return -EPERM;
3575
3576 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3577         if (dbg_uwbemul) {
3578                 tpacpi_uwb_emulstate = !!radio_on;
3579                 if (update_rfk)
3580                         uwb_update_rfk();
3581                 return 0;
3582         }
3583 #endif
3584
3585         status = (radio_on) ? TP_ACPI_UWB_RADIOSSW : 0;
3586         if (!acpi_evalf(hkey_handle, NULL, "SUWB", "vd", status))
3587                 return -EIO;
3588
3589         if (update_rfk)
3590                 uwb_update_rfk();
3591
3592         return 0;
3593 }
3594
3595 /* --------------------------------------------------------------------- */
3596
3597 static int tpacpi_uwb_rfk_get(void *data, enum rfkill_state *state)
3598 {
3599         int uwbs = uwb_get_radiosw();
3600
3601         if (uwbs < 0)
3602                 return uwbs;
3603
3604         *state = uwbs;
3605         return 0;
3606 }
3607
3608 static int tpacpi_uwb_rfk_set(void *data, enum rfkill_state state)
3609 {
3610         return uwb_set_radiosw((state == RFKILL_STATE_UNBLOCKED), 0);
3611 }
3612
3613 static void uwb_exit(void)
3614 {
3615         if (tpacpi_uwb_rfkill)
3616                 rfkill_unregister(tpacpi_uwb_rfkill);
3617 }
3618
3619 static int __init uwb_init(struct ibm_init_struct *iibm)
3620 {
3621         int res;
3622         int status = 0;
3623
3624         vdbg_printk(TPACPI_DBG_INIT, "initializing uwb subdriver\n");
3625
3626         TPACPI_ACPIHANDLE_INIT(hkey);
3627
3628         tp_features.uwb = hkey_handle &&
3629             acpi_evalf(hkey_handle, &status, "GUWB", "qd");
3630
3631         vdbg_printk(TPACPI_DBG_INIT, "uwb is %s, status 0x%02x\n",
3632                 str_supported(tp_features.uwb),
3633                 status);
3634
3635 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3636         if (dbg_uwbemul) {
3637                 tp_features.uwb = 1;
3638                 printk(TPACPI_INFO
3639                         "uwb switch emulation enabled\n");
3640         } else
3641 #endif
3642         if (tp_features.uwb &&
3643             !(status & TP_ACPI_UWB_HWPRESENT)) {
3644                 /* no uwb hardware present in system */
3645                 tp_features.uwb = 0;
3646                 dbg_printk(TPACPI_DBG_INIT,
3647                            "uwb hardware not installed\n");
3648         }
3649
3650         if (!tp_features.uwb)
3651                 return 1;
3652
3653         res = tpacpi_new_rfkill(TPACPI_RFK_UWB_SW_ID,
3654                                 &tpacpi_uwb_rfkill,
3655                                 RFKILL_TYPE_UWB,
3656                                 "tpacpi_uwb_sw",
3657                                 false,
3658                                 tpacpi_uwb_rfk_set,
3659                                 tpacpi_uwb_rfk_get);
3660
3661         return res;
3662 }
3663
3664 static struct ibm_struct uwb_driver_data = {
3665         .name = "uwb",
3666         .exit = uwb_exit,
3667         .flags.experimental = 1,
3668 };
3669
3670 /*************************************************************************
3671  * Video subdriver
3672  */
3673
3674 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
3675
3676 enum video_access_mode {
3677         TPACPI_VIDEO_NONE = 0,
3678         TPACPI_VIDEO_570,       /* 570 */
3679         TPACPI_VIDEO_770,       /* 600e/x, 770e, 770x */
3680         TPACPI_VIDEO_NEW,       /* all others */
3681 };
3682
3683 enum {  /* video status flags, based on VIDEO_570 */
3684         TP_ACPI_VIDEO_S_LCD = 0x01,     /* LCD output enabled */
3685         TP_ACPI_VIDEO_S_CRT = 0x02,     /* CRT output enabled */
3686         TP_ACPI_VIDEO_S_DVI = 0x08,     /* DVI output enabled */
3687 };
3688
3689 enum {  /* TPACPI_VIDEO_570 constants */
3690         TP_ACPI_VIDEO_570_PHSCMD = 0x87,        /* unknown magic constant :( */
3691         TP_ACPI_VIDEO_570_PHSMASK = 0x03,       /* PHS bits that map to
3692                                                  * video_status_flags */
3693         TP_ACPI_VIDEO_570_PHS2CMD = 0x8b,       /* unknown magic constant :( */
3694         TP_ACPI_VIDEO_570_PHS2SET = 0x80,       /* unknown magic constant :( */
3695 };
3696
3697 static enum video_access_mode video_supported;
3698 static int video_orig_autosw;
3699
3700 static int video_autosw_get(void);
3701 static int video_autosw_set(int enable);
3702
3703 TPACPI_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID");       /* G41 */
3704
3705 static int __init video_init(struct ibm_init_struct *iibm)
3706 {
3707         int ivga;
3708
3709         vdbg_printk(TPACPI_DBG_INIT, "initializing video subdriver\n");
3710
3711         TPACPI_ACPIHANDLE_INIT(vid);
3712         TPACPI_ACPIHANDLE_INIT(vid2);
3713
3714         if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga)
3715                 /* G41, assume IVGA doesn't change */
3716                 vid_handle = vid2_handle;
3717
3718         if (!vid_handle)
3719                 /* video switching not supported on R30, R31 */
3720                 video_supported = TPACPI_VIDEO_NONE;
3721         else if (acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd"))
3722                 /* 570 */
3723                 video_supported = TPACPI_VIDEO_570;
3724         else if (acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd"))
3725                 /* 600e/x, 770e, 770x */
3726                 video_supported = TPACPI_VIDEO_770;
3727         else
3728                 /* all others */
3729                 video_supported = TPACPI_VIDEO_NEW;
3730
3731         vdbg_printk(TPACPI_DBG_INIT, "video is %s, mode %d\n",
3732                 str_supported(video_supported != TPACPI_VIDEO_NONE),
3733                 video_supported);
3734
3735         return (video_supported != TPACPI_VIDEO_NONE)? 0 : 1;
3736 }
3737
3738 static void video_exit(void)
3739 {
3740         dbg_printk(TPACPI_DBG_EXIT,
3741                    "restoring original video autoswitch mode\n");
3742         if (video_autosw_set(video_orig_autosw))
3743                 printk(TPACPI_ERR "error while trying to restore original "
3744                         "video autoswitch mode\n");
3745 }
3746
3747 static int video_outputsw_get(void)
3748 {
3749         int status = 0;
3750         int i;
3751
3752         switch (video_supported) {
3753         case TPACPI_VIDEO_570:
3754                 if (!acpi_evalf(NULL, &i, "\\_SB.PHS", "dd",
3755                                  TP_ACPI_VIDEO_570_PHSCMD))
3756                         return -EIO;
3757                 status = i & TP_ACPI_VIDEO_570_PHSMASK;
3758                 break;
3759         case TPACPI_VIDEO_770:
3760                 if (!acpi_evalf(NULL, &i, "\\VCDL", "d"))
3761                         return -EIO;
3762                 if (i)
3763                         status |= TP_ACPI_VIDEO_S_LCD;
3764                 if (!acpi_evalf(NULL, &i, "\\VCDC", "d"))
3765                         return -EIO;
3766                 if (i)
3767                         status |= TP_ACPI_VIDEO_S_CRT;
3768                 break;
3769         case TPACPI_VIDEO_NEW:
3770                 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1) ||
3771                     !acpi_evalf(NULL, &i, "\\VCDC", "d"))
3772                         return -EIO;
3773                 if (i)
3774                         status |= TP_ACPI_VIDEO_S_CRT;
3775
3776                 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0) ||
3777                     !acpi_evalf(NULL, &i, "\\VCDL", "d"))
3778                         return -EIO;
3779                 if (i)
3780                         status |= TP_ACPI_VIDEO_S_LCD;
3781                 if (!acpi_evalf(NULL, &i, "\\VCDD", "d"))
3782                         return -EIO;
3783                 if (i)
3784                         status |= TP_ACPI_VIDEO_S_DVI;
3785                 break;
3786         default:
3787                 return -ENOSYS;
3788         }
3789
3790         return status;
3791 }
3792
3793 static int video_outputsw_set(int status)
3794 {
3795         int autosw;
3796         int res = 0;
3797
3798         switch (video_supported) {
3799         case TPACPI_VIDEO_570:
3800                 res = acpi_evalf(NULL, NULL,
3801                                  "\\_SB.PHS2", "vdd",
3802                                  TP_ACPI_VIDEO_570_PHS2CMD,
3803                                  status | TP_ACPI_VIDEO_570_PHS2SET);
3804                 break;
3805         case TPACPI_VIDEO_770:
3806                 autosw = video_autosw_get();
3807                 if (autosw < 0)
3808                         return autosw;
3809
3810                 res = video_autosw_set(1);
3811                 if (res)
3812                         return res;
3813                 res = acpi_evalf(vid_handle, NULL,
3814                                  "ASWT", "vdd", status * 0x100, 0);
3815                 if (!autosw && video_autosw_set(autosw)) {
3816                         printk(TPACPI_ERR
3817                                "video auto-switch left enabled due to error\n");
3818                         return -EIO;
3819                 }
3820                 break;
3821         case TPACPI_VIDEO_NEW:
3822                 res = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) &&
3823                       acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1);
3824                 break;
3825         default:
3826                 return -ENOSYS;
3827         }
3828
3829         return (res)? 0 : -EIO;
3830 }
3831
3832 static int video_autosw_get(void)
3833 {
3834         int autosw = 0;
3835
3836         switch (video_supported) {
3837         case TPACPI_VIDEO_570:
3838                 if (!acpi_evalf(vid_handle, &autosw, "SWIT", "d"))
3839                         return -EIO;
3840                 break;
3841         case TPACPI_VIDEO_770:
3842         case TPACPI_VIDEO_NEW:
3843                 if (!acpi_evalf(vid_handle, &autosw, "^VDEE", "d"))
3844                         return -EIO;
3845                 break;
3846         default:
3847                 return -ENOSYS;
3848         }
3849
3850         return autosw & 1;
3851 }
3852
3853 static int video_autosw_set(int enable)
3854 {
3855         if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", (enable)? 1 : 0))
3856                 return -EIO;
3857         return 0;
3858 }
3859
3860 static int video_outputsw_cycle(void)
3861 {
3862         int autosw = video_autosw_get();
3863         int res;
3864
3865         if (autosw < 0)
3866                 return autosw;
3867
3868         switch (video_supported) {
3869         case TPACPI_VIDEO_570:
3870                 res = video_autosw_set(1);
3871                 if (res)
3872                         return res;
3873                 res = acpi_evalf(ec_handle, NULL, "_Q16", "v");
3874                 break;
3875         case TPACPI_VIDEO_770:
3876         case TPACPI_VIDEO_NEW:
3877                 res = video_autosw_set(1);
3878                 if (res)
3879                         return res;
3880                 res = acpi_evalf(vid_handle, NULL, "VSWT", "v");
3881                 break;
3882         default:
3883                 return -ENOSYS;
3884         }
3885         if (!autosw && video_autosw_set(autosw)) {
3886                 printk(TPACPI_ERR
3887                        "video auto-switch left enabled due to error\n");
3888                 return -EIO;
3889         }
3890
3891         return (res)? 0 : -EIO;
3892 }
3893
3894 static int video_expand_toggle(void)
3895 {
3896         switch (video_supported) {
3897         case TPACPI_VIDEO_570:
3898                 return acpi_evalf(ec_handle, NULL, "_Q17", "v")?
3899                         0 : -EIO;
3900         case TPACPI_VIDEO_770:
3901                 return acpi_evalf(vid_handle, NULL, "VEXP", "v")?
3902                         0 : -EIO;
3903         case TPACPI_VIDEO_NEW:
3904                 return acpi_evalf(NULL, NULL, "\\VEXP", "v")?
3905                         0 : -EIO;
3906         default:
3907                 return -ENOSYS;
3908         }
3909         /* not reached */
3910 }
3911
3912 static int video_read(char *p)
3913 {
3914         int status, autosw;
3915         int len = 0;
3916
3917         if (video_supported == TPACPI_VIDEO_NONE) {
3918                 len += sprintf(p + len, "status:\t\tnot supported\n");
3919                 return len;
3920         }
3921
3922         status = video_outputsw_get();
3923         if (status < 0)
3924                 return status;
3925
3926         autosw = video_autosw_get();
3927         if (autosw < 0)
3928                 return autosw;
3929
3930         len += sprintf(p + len, "status:\t\tsupported\n");
3931         len += sprintf(p + len, "lcd:\t\t%s\n", enabled(status, 0));
3932         len += sprintf(p + len, "crt:\t\t%s\n", enabled(status, 1));
3933         if (video_supported == TPACPI_VIDEO_NEW)
3934                 len += sprintf(p + len, "dvi:\t\t%s\n", enabled(status, 3));
3935         len += sprintf(p + len, "auto:\t\t%s\n", enabled(autosw, 0));
3936         len += sprintf(p + len, "commands:\tlcd_enable, lcd_disable\n");
3937         len += sprintf(p + len, "commands:\tcrt_enable, crt_disable\n");
3938         if (video_supported == TPACPI_VIDEO_NEW)
3939                 len += sprintf(p + len, "commands:\tdvi_enable, dvi_disable\n");
3940         len += sprintf(p + len, "commands:\tauto_enable, auto_disable\n");
3941         len += sprintf(p + len, "commands:\tvideo_switch, expand_toggle\n");
3942
3943         return len;
3944 }
3945
3946 static int video_write(char *buf)
3947 {
3948         char *cmd;
3949         int enable, disable, status;
3950         int res;
3951
3952         if (video_supported == TPACPI_VIDEO_NONE)
3953                 return -ENODEV;
3954
3955         enable = 0;
3956         disable = 0;
3957
3958         while ((cmd = next_cmd(&buf))) {
3959                 if (strlencmp(cmd, "lcd_enable") == 0) {
3960                         enable |= TP_ACPI_VIDEO_S_LCD;
3961                 } else if (strlencmp(cmd, "lcd_disable") == 0) {
3962                         disable |= TP_ACPI_VIDEO_S_LCD;
3963                 } else if (strlencmp(cmd, "crt_enable") == 0) {
3964                         enable |= TP_ACPI_VIDEO_S_CRT;
3965                 } else if (strlencmp(cmd, "crt_disable") == 0) {
3966                         disable |= TP_ACPI_VIDEO_S_CRT;
3967                 } else if (video_supported == TPACPI_VIDEO_NEW &&
3968                            strlencmp(cmd, "dvi_enable") == 0) {
3969                         enable |= TP_ACPI_VIDEO_S_DVI;
3970                 } else if (video_supported == TPACPI_VIDEO_NEW &&
3971                            strlencmp(cmd, "dvi_disable") == 0) {
3972                         disable |= TP_ACPI_VIDEO_S_DVI;
3973                 } else if (strlencmp(cmd, "auto_enable") == 0) {
3974                         res = video_autosw_set(1);
3975                         if (res)
3976                                 return res;
3977                 } else if (strlencmp(cmd, "auto_disable") == 0) {
3978                         res = video_autosw_set(0);
3979                         if (res)
3980                                 return res;
3981                 } else if (strlencmp(cmd, "video_switch") == 0) {
3982                         res = video_outputsw_cycle();
3983                         if (res)
3984                                 return res;
3985                 } else if (strlencmp(cmd, "expand_toggle") == 0) {
3986                         res = video_expand_toggle();
3987                         if (res)
3988                                 return res;
3989                 } else
3990                         return -EINVAL;
3991         }
3992
3993         if (enable || disable) {
3994                 status = video_outputsw_get();
3995                 if (status < 0)
3996                         return status;
3997                 res = video_outputsw_set((status & ~disable) | enable);
3998                 if (res)
3999                         return res;
4000         }
4001
4002         return 0;
4003 }
4004
4005 static struct ibm_struct video_driver_data = {
4006         .name = "video",
4007         .read = video_read,
4008         .write = video_write,
4009         .exit = video_exit,
4010 };
4011
4012 #endif /* CONFIG_THINKPAD_ACPI_VIDEO */
4013
4014 /*************************************************************************
4015  * Light (thinklight) subdriver
4016  */
4017
4018 TPACPI_HANDLE(lght, root, "\\LGHT");    /* A21e, A2xm/p, T20-22, X20-21 */
4019 TPACPI_HANDLE(ledb, ec, "LEDB");                /* G4x */
4020
4021 static int light_get_status(void)
4022 {
4023         int status = 0;
4024
4025         if (tp_features.light_status) {
4026                 if (!acpi_evalf(ec_handle, &status, "KBLT", "d"))
4027                         return -EIO;
4028                 return (!!status);
4029         }
4030
4031         return -ENXIO;
4032 }
4033
4034 static int light_set_status(int status)
4035 {
4036         int rc;
4037
4038         if (tp_features.light) {
4039                 if (cmos_handle) {
4040                         rc = acpi_evalf(cmos_handle, NULL, NULL, "vd",
4041                                         (status)?
4042                                                 TP_CMOS_THINKLIGHT_ON :
4043                                                 TP_CMOS_THINKLIGHT_OFF);
4044                 } else {
4045                         rc = acpi_evalf(lght_handle, NULL, NULL, "vd",
4046                                         (status)? 1 : 0);
4047                 }
4048                 return (rc)? 0 : -EIO;
4049         }
4050
4051         return -ENXIO;
4052 }
4053
4054 static void light_set_status_worker(struct work_struct *work)
4055 {
4056         struct tpacpi_led_classdev *data =
4057                         container_of(work, struct tpacpi_led_classdev, work);
4058
4059         if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING))
4060                 light_set_status((data->new_brightness != LED_OFF));
4061 }
4062
4063 static void light_sysfs_set(struct led_classdev *led_cdev,
4064                         enum led_brightness brightness)
4065 {
4066         struct tpacpi_led_classdev *data =
4067                 container_of(led_cdev,
4068                              struct tpacpi_led_classdev,
4069                              led_classdev);
4070         data->new_brightness = brightness;
4071         queue_work(tpacpi_wq, &data->work);
4072 }
4073
4074 static enum led_brightness light_sysfs_get(struct led_classdev *led_cdev)
4075 {
4076         return (light_get_status() == 1)? LED_FULL : LED_OFF;
4077 }
4078
4079 static struct tpacpi_led_classdev tpacpi_led_thinklight = {
4080         .led_classdev = {
4081                 .name           = "tpacpi::thinklight",
4082                 .brightness_set = &light_sysfs_set,
4083                 .brightness_get = &light_sysfs_get,
4084         }
4085 };
4086
4087 static int __init light_init(struct ibm_init_struct *iibm)
4088 {
4089         int rc;
4090
4091         vdbg_printk(TPACPI_DBG_INIT, "initializing light subdriver\n");
4092
4093         TPACPI_ACPIHANDLE_INIT(ledb);
4094         TPACPI_ACPIHANDLE_INIT(lght);
4095         TPACPI_ACPIHANDLE_INIT(cmos);
4096         INIT_WORK(&tpacpi_led_thinklight.work, light_set_status_worker);
4097
4098         /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */
4099         tp_features.light = (cmos_handle || lght_handle) && !ledb_handle;
4100
4101         if (tp_features.light)
4102                 /* light status not supported on
4103                    570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */
4104                 tp_features.light_status =
4105                         acpi_evalf(ec_handle, NULL, "KBLT", "qv");
4106
4107         vdbg_printk(TPACPI_DBG_INIT, "light is %s, light status is %s\n",
4108                 str_supported(tp_features.light),
4109                 str_supported(tp_features.light_status));
4110
4111         if (!tp_features.light)
4112                 return 1;
4113
4114         rc = led_classdev_register(&tpacpi_pdev->dev,
4115                                    &tpacpi_led_thinklight.led_classdev);
4116
4117         if (rc < 0) {
4118                 tp_features.light = 0;
4119                 tp_features.light_status = 0;
4120         } else  {
4121                 rc = 0;
4122         }
4123
4124         return rc;
4125 }
4126
4127 static void light_exit(void)
4128 {
4129         led_classdev_unregister(&tpacpi_led_thinklight.led_classdev);
4130         if (work_pending(&tpacpi_led_thinklight.work))
4131                 flush_workqueue(tpacpi_wq);
4132 }
4133
4134 static int light_read(char *p)
4135 {
4136         int len = 0;
4137         int status;
4138
4139         if (!tp_features.light) {
4140                 len += sprintf(p + len, "status:\t\tnot supported\n");
4141         } else if (!tp_features.light_status) {
4142                 len += sprintf(p + len, "status:\t\tunknown\n");
4143                 len += sprintf(p + len, "commands:\ton, off\n");
4144         } else {
4145                 status = light_get_status();
4146                 if (status < 0)
4147                         return status;
4148                 len += sprintf(p + len, "status:\t\t%s\n", onoff(status, 0));
4149                 len += sprintf(p + len, "commands:\ton, off\n");
4150         }
4151
4152         return len;
4153 }
4154
4155 static int light_write(char *buf)
4156 {
4157         char *cmd;
4158         int newstatus = 0;
4159
4160         if (!tp_features.light)
4161                 return -ENODEV;
4162
4163         while ((cmd = next_cmd(&buf))) {
4164                 if (strlencmp(cmd, "on") == 0) {
4165                         newstatus = 1;
4166                 } else if (strlencmp(cmd, "off") == 0) {
4167                         newstatus = 0;
4168                 } else
4169                         return -EINVAL;
4170         }
4171
4172         return light_set_status(newstatus);
4173 }
4174
4175 static struct ibm_struct light_driver_data = {
4176         .name = "light",
4177         .read = light_read,
4178         .write = light_write,
4179         .exit = light_exit,
4180 };
4181
4182 /*************************************************************************
4183  * Dock subdriver
4184  */
4185
4186 #ifdef CONFIG_THINKPAD_ACPI_DOCK
4187
4188 static void dock_notify(struct ibm_struct *ibm, u32 event);
4189 static int dock_read(char *p);
4190 static int dock_write(char *buf);
4191
4192 TPACPI_HANDLE(dock, root, "\\_SB.GDCK", /* X30, X31, X40 */
4193            "\\_SB.PCI0.DOCK",   /* 600e/x,770e,770x,A2xm/p,T20-22,X20-21 */
4194            "\\_SB.PCI0.PCI1.DOCK",      /* all others */
4195            "\\_SB.PCI.ISA.SLCE",        /* 570 */
4196     );                          /* A21e,G4x,R30,R31,R32,R40,R40e,R50e */
4197
4198 /* don't list other alternatives as we install a notify handler on the 570 */
4199 TPACPI_HANDLE(pci, root, "\\_SB.PCI");  /* 570 */
4200
4201 static const struct acpi_device_id ibm_pci_device_ids[] = {
4202         {PCI_ROOT_HID_STRING, 0},
4203         {"", 0},
4204 };
4205
4206 static struct tp_acpi_drv_struct ibm_dock_acpidriver[2] = {
4207         {
4208          .notify = dock_notify,
4209          .handle = &dock_handle,
4210          .type = ACPI_SYSTEM_NOTIFY,
4211         },
4212         {
4213         /* THIS ONE MUST NEVER BE USED FOR DRIVER AUTOLOADING.
4214          * We just use it to get notifications of dock hotplug
4215          * in very old thinkpads */
4216          .hid = ibm_pci_device_ids,
4217          .notify = dock_notify,
4218          .handle = &pci_handle,
4219          .type = ACPI_SYSTEM_NOTIFY,
4220         },
4221 };
4222
4223 static struct ibm_struct dock_driver_data[2] = {
4224         {
4225          .name = "dock",
4226          .read = dock_read,
4227          .write = dock_write,
4228          .acpi = &ibm_dock_acpidriver[0],
4229         },
4230         {
4231          .name = "dock",
4232          .acpi = &ibm_dock_acpidriver[1],
4233         },
4234 };
4235
4236 #define dock_docked() (_sta(dock_handle) & 1)
4237
4238 static int __init dock_init(struct ibm_init_struct *iibm)
4239 {
4240         vdbg_printk(TPACPI_DBG_INIT, "initializing dock subdriver\n");
4241
4242         TPACPI_ACPIHANDLE_INIT(dock);
4243
4244         vdbg_printk(TPACPI_DBG_INIT, "dock is %s\n",
4245                 str_supported(dock_handle != NULL));
4246
4247         return (dock_handle)? 0 : 1;
4248 }
4249
4250 static int __init dock_init2(struct ibm_init_struct *iibm)
4251 {
4252         int dock2_needed;
4253
4254         vdbg_printk(TPACPI_DBG_INIT, "initializing dock subdriver part 2\n");
4255
4256         if (dock_driver_data[0].flags.acpi_driver_registered &&
4257             dock_driver_data[0].flags.acpi_notify_installed) {
4258                 TPACPI_ACPIHANDLE_INIT(pci);
4259                 dock2_needed = (pci_handle != NULL);
4260                 vdbg_printk(TPACPI_DBG_INIT,
4261                             "dock PCI handler for the TP 570 is %s\n",
4262                             str_supported(dock2_needed));
4263         } else {
4264                 vdbg_printk(TPACPI_DBG_INIT,
4265                 "dock subdriver part 2 not required\n");
4266                 dock2_needed = 0;
4267         }
4268
4269         return (dock2_needed)? 0 : 1;
4270 }
4271
4272 static void dock_notify(struct ibm_struct *ibm, u32 event)
4273 {
4274         int docked = dock_docked();
4275         int pci = ibm->acpi->hid && ibm->acpi->device &&
4276                 acpi_match_device_ids(ibm->acpi->device, ibm_pci_device_ids);
4277         int data;
4278
4279         if (event == 1 && !pci) /* 570 */
4280                 data = 1;       /* button */
4281         else if (event == 1 && pci)     /* 570 */
4282                 data = 3;       /* dock */
4283         else if (event == 3 && docked)
4284                 data = 1;       /* button */
4285         else if (event == 3 && !docked)
4286                 data = 2;       /* undock */
4287         else if (event == 0 && docked)
4288                 data = 3;       /* dock */
4289         else {
4290                 printk(TPACPI_ERR "unknown dock event %d, status %d\n",
4291                        event, _sta(dock_handle));
4292                 data = 0;       /* unknown */
4293         }
4294         acpi_bus_generate_proc_event(ibm->acpi->device, event, data);
4295         acpi_bus_generate_netlink_event(ibm->acpi->device->pnp.device_class,
4296                                           dev_name(&ibm->acpi->device->dev),
4297                                           event, data);
4298 }
4299
4300 static int dock_read(char *p)
4301 {
4302         int len = 0;
4303         int docked = dock_docked();
4304
4305         if (!dock_handle)
4306                 len += sprintf(p + len, "status:\t\tnot supported\n");
4307         else if (!docked)
4308                 len += sprintf(p + len, "status:\t\tundocked\n");
4309         else {
4310                 len += sprintf(p + len, "status:\t\tdocked\n");
4311                 len += sprintf(p + len, "commands:\tdock, undock\n");
4312         }
4313
4314         return len;
4315 }
4316
4317 static int dock_write(char *buf)
4318 {
4319         char *cmd;
4320
4321         if (!dock_docked())
4322                 return -ENODEV;
4323
4324         while ((cmd = next_cmd(&buf))) {
4325                 if (strlencmp(cmd, "undock") == 0) {
4326                         if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 0) ||
4327                             !acpi_evalf(dock_handle, NULL, "_EJ0", "vd", 1))
4328                                 return -EIO;
4329                 } else if (strlencmp(cmd, "dock") == 0) {
4330                         if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 1))
4331                                 return -EIO;
4332                 } else
4333                         return -EINVAL;
4334         }
4335
4336         return 0;
4337 }
4338
4339 #endif /* CONFIG_THINKPAD_ACPI_DOCK */
4340
4341 /*************************************************************************
4342  * Bay subdriver
4343  */
4344
4345 #ifdef CONFIG_THINKPAD_ACPI_BAY
4346
4347 TPACPI_HANDLE(bay, root, "\\_SB.PCI.IDE.SECN.MAST",     /* 570 */
4348            "\\_SB.PCI0.IDE0.IDES.IDSM", /* 600e/x, 770e, 770x */
4349            "\\_SB.PCI0.SATA.SCND.MSTR", /* T60, X60, Z60 */
4350            "\\_SB.PCI0.IDE0.SCND.MSTR", /* all others */
4351            );                           /* A21e, R30, R31 */
4352 TPACPI_HANDLE(bay_ej, bay, "_EJ3",      /* 600e/x, A2xm/p, A3x */
4353            "_EJ0",              /* all others */
4354            );                   /* 570,A21e,G4x,R30,R31,R32,R40e,R50e */
4355 TPACPI_HANDLE(bay2, root, "\\_SB.PCI0.IDE0.PRIM.SLAV",  /* A3x, R32 */
4356            "\\_SB.PCI0.IDE0.IDEP.IDPS", /* 600e/x, 770e, 770x */
4357            );                           /* all others */
4358 TPACPI_HANDLE(bay2_ej, bay2, "_EJ3",    /* 600e/x, 770e, A3x */
4359            "_EJ0",                      /* 770x */
4360            );                           /* all others */
4361
4362 static int __init bay_init(struct ibm_init_struct *iibm)
4363 {
4364         vdbg_printk(TPACPI_DBG_INIT, "initializing bay subdriver\n");
4365
4366         TPACPI_ACPIHANDLE_INIT(bay);
4367         if (bay_handle)
4368                 TPACPI_ACPIHANDLE_INIT(bay_ej);
4369         TPACPI_ACPIHANDLE_INIT(bay2);
4370         if (bay2_handle)
4371                 TPACPI_ACPIHANDLE_INIT(bay2_ej);
4372
4373         tp_features.bay_status = bay_handle &&
4374                 acpi_evalf(bay_handle, NULL, "_STA", "qv");
4375         tp_features.bay_status2 = bay2_handle &&
4376                 acpi_evalf(bay2_handle, NULL, "_STA", "qv");
4377
4378         tp_features.bay_eject = bay_handle && bay_ej_handle &&
4379                 (strlencmp(bay_ej_path, "_EJ0") == 0 || experimental);
4380         tp_features.bay_eject2 = bay2_handle && bay2_ej_handle &&
4381                 (strlencmp(bay2_ej_path, "_EJ0") == 0 || experimental);
4382
4383         vdbg_printk(TPACPI_DBG_INIT,
4384                 "bay 1: status %s, eject %s; bay 2: status %s, eject %s\n",
4385                 str_supported(tp_features.bay_status),
4386                 str_supported(tp_features.bay_eject),
4387                 str_supported(tp_features.bay_status2),
4388                 str_supported(tp_features.bay_eject2));
4389
4390         return (tp_features.bay_status || tp_features.bay_eject ||
4391                 tp_features.bay_status2 || tp_features.bay_eject2)? 0 : 1;
4392 }
4393
4394 static void bay_notify(struct ibm_struct *ibm, u32 event)
4395 {
4396         acpi_bus_generate_proc_event(ibm->acpi->device, event, 0);
4397         acpi_bus_generate_netlink_event(ibm->acpi->device->pnp.device_class,
4398                                           dev_name(&ibm->acpi->device->dev),
4399                                           event, 0);
4400 }
4401
4402 #define bay_occupied(b) (_sta(b##_handle) & 1)
4403
4404 static int bay_read(char *p)
4405 {
4406         int len = 0;
4407         int occupied = bay_occupied(bay);
4408         int occupied2 = bay_occupied(bay2);
4409         int eject, eject2;
4410
4411         len += sprintf(p + len, "status:\t\t%s\n",
4412                 tp_features.bay_status ?
4413                         (occupied ? "occupied" : "unoccupied") :
4414                                 "not supported");
4415         if (tp_features.bay_status2)
4416                 len += sprintf(p + len, "status2:\t%s\n", occupied2 ?
4417                                "occupied" : "unoccupied");
4418
4419         eject = tp_features.bay_eject && occupied;
4420         eject2 = tp_features.bay_eject2 && occupied2;
4421
4422         if (eject && eject2)
4423                 len += sprintf(p + len, "commands:\teject, eject2\n");
4424         else if (eject)
4425                 len += sprintf(p + len, "commands:\teject\n");
4426         else if (eject2)
4427                 len += sprintf(p + len, "commands:\teject2\n");
4428
4429         return len;
4430 }
4431
4432 static int bay_write(char *buf)
4433 {
4434         char *cmd;
4435
4436         if (!tp_features.bay_eject && !tp_features.bay_eject2)
4437                 return -ENODEV;
4438
4439         while ((cmd = next_cmd(&buf))) {
4440                 if (tp_features.bay_eject && strlencmp(cmd, "eject") == 0) {
4441                         if (!acpi_evalf(bay_ej_handle, NULL, NULL, "vd", 1))
4442                                 return -EIO;
4443                 } else if (tp_features.bay_eject2 &&
4444                            strlencmp(cmd, "eject2") == 0) {
4445                         if (!acpi_evalf(bay2_ej_handle, NULL, NULL, "vd", 1))
4446                                 return -EIO;
4447                 } else
4448                         return -EINVAL;
4449         }
4450
4451         return 0;
4452 }
4453
4454 static struct tp_acpi_drv_struct ibm_bay_acpidriver = {
4455         .notify = bay_notify,
4456         .handle = &bay_handle,
4457         .type = ACPI_SYSTEM_NOTIFY,
4458 };
4459
4460 static struct ibm_struct bay_driver_data = {
4461         .name = "bay",
4462         .read = bay_read,
4463         .write = bay_write,
4464         .acpi = &ibm_bay_acpidriver,
4465 };
4466
4467 #endif /* CONFIG_THINKPAD_ACPI_BAY */
4468
4469 /*************************************************************************
4470  * CMOS subdriver
4471  */
4472
4473 /* sysfs cmos_command -------------------------------------------------- */
4474 static ssize_t cmos_command_store(struct device *dev,
4475                             struct device_attribute *attr,
4476                             const char *buf, size_t count)
4477 {
4478         unsigned long cmos_cmd;
4479         int res;
4480
4481         if (parse_strtoul(buf, 21, &cmos_cmd))
4482                 return -EINVAL;
4483
4484         res = issue_thinkpad_cmos_command(cmos_cmd);
4485         return (res)? res : count;
4486 }
4487
4488 static struct device_attribute dev_attr_cmos_command =
4489         __ATTR(cmos_command, S_IWUSR, NULL, cmos_command_store);
4490
4491 /* --------------------------------------------------------------------- */
4492
4493 static int __init cmos_init(struct ibm_init_struct *iibm)
4494 {
4495         int res;
4496
4497         vdbg_printk(TPACPI_DBG_INIT,
4498                 "initializing cmos commands subdriver\n");
4499
4500         TPACPI_ACPIHANDLE_INIT(cmos);
4501
4502         vdbg_printk(TPACPI_DBG_INIT, "cmos commands are %s\n",
4503                 str_supported(cmos_handle != NULL));
4504
4505         res = device_create_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
4506         if (res)
4507                 return res;
4508
4509         return (cmos_handle)? 0 : 1;
4510 }
4511
4512 static void cmos_exit(void)
4513 {
4514         device_remove_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
4515 }
4516
4517 static int cmos_read(char *p)
4518 {
4519         int len = 0;
4520
4521         /* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
4522            R30, R31, T20-22, X20-21 */
4523         if (!cmos_handle)
4524                 len += sprintf(p + len, "status:\t\tnot supported\n");
4525         else {
4526                 len += sprintf(p + len, "status:\t\tsupported\n");
4527                 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-21)\n");
4528         }
4529
4530         return len;
4531 }
4532
4533 static int cmos_write(char *buf)
4534 {
4535         char *cmd;
4536         int cmos_cmd, res;
4537
4538         while ((cmd = next_cmd(&buf))) {
4539                 if (sscanf(cmd, "%u", &cmos_cmd) == 1 &&
4540                     cmos_cmd >= 0 && cmos_cmd <= 21) {
4541                         /* cmos_cmd set */
4542                 } else
4543                         return -EINVAL;
4544
4545                 res = issue_thinkpad_cmos_command(cmos_cmd);
4546                 if (res)
4547                         return res;
4548         }
4549
4550         return 0;
4551 }
4552
4553 static struct ibm_struct cmos_driver_data = {
4554         .name = "cmos",
4555         .read = cmos_read,
4556         .write = cmos_write,
4557         .exit = cmos_exit,
4558 };
4559
4560 /*************************************************************************
4561  * LED subdriver
4562  */
4563
4564 enum led_access_mode {
4565         TPACPI_LED_NONE = 0,
4566         TPACPI_LED_570, /* 570 */
4567         TPACPI_LED_OLD, /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
4568         TPACPI_LED_NEW, /* all others */
4569 };
4570
4571 enum {  /* For TPACPI_LED_OLD */
4572         TPACPI_LED_EC_HLCL = 0x0c,      /* EC reg to get led to power on */
4573         TPACPI_LED_EC_HLBL = 0x0d,      /* EC reg to blink a lit led */
4574         TPACPI_LED_EC_HLMS = 0x0e,      /* EC reg to select led to command */
4575 };
4576
4577 enum led_status_t {
4578         TPACPI_LED_OFF = 0,
4579         TPACPI_LED_ON,
4580         TPACPI_LED_BLINK,
4581 };
4582
4583 static enum led_access_mode led_supported;
4584
4585 TPACPI_HANDLE(led, ec, "SLED",  /* 570 */
4586            "SYSL",              /* 600e/x, 770e, 770x, A21e, A2xm/p, */
4587                                 /* T20-22, X20-21 */
4588            "LED",               /* all others */
4589            );                   /* R30, R31 */
4590
4591 #define TPACPI_LED_NUMLEDS 8
4592 static struct tpacpi_led_classdev *tpacpi_leds;
4593 static enum led_status_t tpacpi_led_state_cache[TPACPI_LED_NUMLEDS];
4594 static const char * const tpacpi_led_names[TPACPI_LED_NUMLEDS] = {
4595         /* there's a limit of 19 chars + NULL before 2.6.26 */
4596         "tpacpi::power",
4597         "tpacpi:orange:batt",
4598         "tpacpi:green:batt",
4599         "tpacpi::dock_active",
4600         "tpacpi::bay_active",
4601         "tpacpi::dock_batt",
4602         "tpacpi::unknown_led",
4603         "tpacpi::standby",
4604 };
4605
4606 static int led_get_status(const unsigned int led)
4607 {
4608         int status;
4609         enum led_status_t led_s;
4610
4611         switch (led_supported) {
4612         case TPACPI_LED_570:
4613                 if (!acpi_evalf(ec_handle,
4614                                 &status, "GLED", "dd", 1 << led))
4615                         return -EIO;
4616                 led_s = (status == 0)?
4617                                 TPACPI_LED_OFF :
4618                                 ((status == 1)?
4619                                         TPACPI_LED_ON :
4620                                         TPACPI_LED_BLINK);
4621                 tpacpi_led_state_cache[led] = led_s;
4622                 return led_s;
4623         default:
4624                 return -ENXIO;
4625         }
4626
4627         /* not reached */
4628 }
4629
4630 static int led_set_status(const unsigned int led,
4631                           const enum led_status_t ledstatus)
4632 {
4633         /* off, on, blink. Index is led_status_t */
4634         static const unsigned int led_sled_arg1[] = { 0, 1, 3 };
4635         static const unsigned int led_led_arg1[] = { 0, 0x80, 0xc0 };
4636
4637         int rc = 0;
4638
4639         switch (led_supported) {
4640         case TPACPI_LED_570:
4641                 /* 570 */
4642                 if (led > 7)
4643                         return -EINVAL;
4644                 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
4645                                 (1 << led), led_sled_arg1[ledstatus]))
4646                         rc = -EIO;
4647                 break;
4648         case TPACPI_LED_OLD:
4649                 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */
4650                 if (led > 7)
4651                         return -EINVAL;
4652                 rc = ec_write(TPACPI_LED_EC_HLMS, (1 << led));
4653                 if (rc >= 0)
4654                         rc = ec_write(TPACPI_LED_EC_HLBL,
4655                                       (ledstatus == TPACPI_LED_BLINK) << led);
4656                 if (rc >= 0)
4657                         rc = ec_write(TPACPI_LED_EC_HLCL,
4658                                       (ledstatus != TPACPI_LED_OFF) << led);
4659                 break;
4660         case TPACPI_LED_NEW:
4661                 /* all others */
4662                 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
4663                                 led, led_led_arg1[ledstatus]))
4664                         rc = -EIO;
4665                 break;
4666         default:
4667                 rc = -ENXIO;
4668         }
4669
4670         if (!rc)
4671                 tpacpi_led_state_cache[led] = ledstatus;
4672
4673         return rc;
4674 }
4675
4676 static void led_sysfs_set_status(unsigned int led,
4677                                  enum led_brightness brightness)
4678 {
4679         led_set_status(led,
4680                         (brightness == LED_OFF) ?
4681                         TPACPI_LED_OFF :
4682                         (tpacpi_led_state_cache[led] == TPACPI_LED_BLINK) ?
4683                                 TPACPI_LED_BLINK : TPACPI_LED_ON);
4684 }
4685
4686 static void led_set_status_worker(struct work_struct *work)
4687 {
4688         struct tpacpi_led_classdev *data =
4689                 container_of(work, struct tpacpi_led_classdev, work);
4690
4691         if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING))
4692                 led_sysfs_set_status(data->led, data->new_brightness);
4693 }
4694
4695 static void led_sysfs_set(struct led_classdev *led_cdev,
4696                         enum led_brightness brightness)
4697 {
4698         struct tpacpi_led_classdev *data = container_of(led_cdev,
4699                              struct tpacpi_led_classdev, led_classdev);
4700
4701         data->new_brightness = brightness;
4702         queue_work(tpacpi_wq, &data->work);
4703 }
4704
4705 static int led_sysfs_blink_set(struct led_classdev *led_cdev,
4706                         unsigned long *delay_on, unsigned long *delay_off)
4707 {
4708         struct tpacpi_led_classdev *data = container_of(led_cdev,
4709                              struct tpacpi_led_classdev, led_classdev);
4710
4711         /* Can we choose the flash rate? */
4712         if (*delay_on == 0 && *delay_off == 0) {
4713                 /* yes. set them to the hardware blink rate (1 Hz) */
4714                 *delay_on = 500; /* ms */
4715                 *delay_off = 500; /* ms */
4716         } else if ((*delay_on != 500) || (*delay_off != 500))
4717                 return -EINVAL;
4718
4719         data->new_brightness = TPACPI_LED_BLINK;
4720         queue_work(tpacpi_wq, &data->work);
4721
4722         return 0;
4723 }
4724
4725 static enum led_brightness led_sysfs_get(struct led_classdev *led_cdev)
4726 {
4727         int rc;
4728
4729         struct tpacpi_led_classdev *data = container_of(led_cdev,
4730                              struct tpacpi_led_classdev, led_classdev);
4731
4732         rc = led_get_status(data->led);
4733
4734         if (rc == TPACPI_LED_OFF || rc < 0)
4735                 rc = LED_OFF;   /* no error handling in led class :( */
4736         else
4737                 rc = LED_FULL;
4738
4739         return rc;
4740 }
4741
4742 static void led_exit(void)
4743 {
4744         unsigned int i;
4745
4746         for (i = 0; i < TPACPI_LED_NUMLEDS; i++) {
4747                 if (tpacpi_leds[i].led_classdev.name)
4748                         led_classdev_unregister(&tpacpi_leds[i].led_classdev);
4749         }
4750
4751         kfree(tpacpi_leds);
4752 }
4753
4754 static int __init led_init(struct ibm_init_struct *iibm)
4755 {
4756         unsigned int i;
4757         int rc;
4758
4759         vdbg_printk(TPACPI_DBG_INIT, "initializing LED subdriver\n");
4760
4761         TPACPI_ACPIHANDLE_INIT(led);
4762
4763         if (!led_handle)
4764                 /* led not supported on R30, R31 */
4765                 led_supported = TPACPI_LED_NONE;
4766         else if (strlencmp(led_path, "SLED") == 0)
4767                 /* 570 */
4768                 led_supported = TPACPI_LED_570;
4769         else if (strlencmp(led_path, "SYSL") == 0)
4770                 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
4771                 led_supported = TPACPI_LED_OLD;
4772         else
4773                 /* all others */
4774                 led_supported = TPACPI_LED_NEW;
4775
4776         vdbg_printk(TPACPI_DBG_INIT, "LED commands are %s, mode %d\n",
4777                 str_supported(led_supported), led_supported);
4778
4779         tpacpi_leds = kzalloc(sizeof(*tpacpi_leds) * TPACPI_LED_NUMLEDS,
4780                               GFP_KERNEL);
4781         if (!tpacpi_leds) {
4782                 printk(TPACPI_ERR "Out of memory for LED data\n");
4783                 return -ENOMEM;
4784         }
4785
4786         for (i = 0; i < TPACPI_LED_NUMLEDS; i++) {
4787                 tpacpi_leds[i].led = i;
4788
4789                 tpacpi_leds[i].led_classdev.brightness_set = &led_sysfs_set;
4790                 tpacpi_leds[i].led_classdev.blink_set = &led_sysfs_blink_set;
4791                 if (led_supported == TPACPI_LED_570)
4792                         tpacpi_leds[i].led_classdev.brightness_get =
4793                                                         &led_sysfs_get;
4794
4795                 tpacpi_leds[i].led_classdev.name = tpacpi_led_names[i];
4796
4797                 INIT_WORK(&tpacpi_leds[i].work, led_set_status_worker);
4798
4799                 rc = led_classdev_register(&tpacpi_pdev->dev,
4800                                            &tpacpi_leds[i].led_classdev);
4801                 if (rc < 0) {
4802                         tpacpi_leds[i].led_classdev.name = NULL;
4803                         led_exit();
4804                         return rc;
4805                 }
4806         }
4807
4808         return (led_supported != TPACPI_LED_NONE)? 0 : 1;
4809 }
4810
4811 #define str_led_status(s) \
4812         ((s) == TPACPI_LED_OFF ? "off" : \
4813                 ((s) == TPACPI_LED_ON ? "on" : "blinking"))
4814
4815 static int led_read(char *p)
4816 {
4817         int len = 0;
4818
4819         if (!led_supported) {
4820                 len += sprintf(p + len, "status:\t\tnot supported\n");
4821                 return len;
4822         }
4823         len += sprintf(p + len, "status:\t\tsupported\n");
4824
4825         if (led_supported == TPACPI_LED_570) {
4826                 /* 570 */
4827                 int i, status;
4828                 for (i = 0; i < 8; i++) {
4829                         status = led_get_status(i);
4830                         if (status < 0)
4831                                 return -EIO;
4832                         len += sprintf(p + len, "%d:\t\t%s\n",
4833                                        i, str_led_status(status));
4834                 }
4835         }
4836
4837         len += sprintf(p + len, "commands:\t"
4838                        "<led> on, <led> off, <led> blink (<led> is 0-7)\n");
4839
4840         return len;
4841 }
4842
4843 static int led_write(char *buf)
4844 {
4845         char *cmd;
4846         int led, rc;
4847         enum led_status_t s;
4848
4849         if (!led_supported)
4850                 return -ENODEV;
4851
4852         while ((cmd = next_cmd(&buf))) {
4853                 if (sscanf(cmd, "%d", &led) != 1 || led < 0 || led > 7)
4854                         return -EINVAL;
4855
4856                 if (strstr(cmd, "off")) {
4857                         s = TPACPI_LED_OFF;
4858                 } else if (strstr(cmd, "on")) {
4859                         s = TPACPI_LED_ON;
4860                 } else if (strstr(cmd, "blink")) {
4861                         s = TPACPI_LED_BLINK;
4862                 } else {
4863                         return -EINVAL;
4864                 }
4865
4866                 rc = led_set_status(led, s);
4867                 if (rc < 0)
4868                         return rc;
4869         }
4870
4871         return 0;
4872 }
4873
4874 static struct ibm_struct led_driver_data = {
4875         .name = "led",
4876         .read = led_read,
4877         .write = led_write,
4878         .exit = led_exit,
4879 };
4880
4881 /*************************************************************************
4882  * Beep subdriver
4883  */
4884
4885 TPACPI_HANDLE(beep, ec, "BEEP");        /* all except R30, R31 */
4886
4887 static int __init beep_init(struct ibm_init_struct *iibm)
4888 {
4889         vdbg_printk(TPACPI_DBG_INIT, "initializing beep subdriver\n");
4890
4891         TPACPI_ACPIHANDLE_INIT(beep);
4892
4893         vdbg_printk(TPACPI_DBG_INIT, "beep is %s\n",
4894                 str_supported(beep_handle != NULL));
4895
4896         return (beep_handle)? 0 : 1;
4897 }
4898
4899 static int beep_read(char *p)
4900 {
4901         int len = 0;
4902
4903         if (!beep_handle)
4904                 len += sprintf(p + len, "status:\t\tnot supported\n");
4905         else {
4906                 len += sprintf(p + len, "status:\t\tsupported\n");
4907                 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-17)\n");
4908         }
4909
4910         return len;
4911 }
4912
4913 static int beep_write(char *buf)
4914 {
4915         char *cmd;
4916         int beep_cmd;
4917
4918         if (!beep_handle)
4919                 return -ENODEV;
4920
4921         while ((cmd = next_cmd(&buf))) {
4922                 if (sscanf(cmd, "%u", &beep_cmd) == 1 &&
4923                     beep_cmd >= 0 && beep_cmd <= 17) {
4924                         /* beep_cmd set */
4925                 } else
4926                         return -EINVAL;
4927                 if (!acpi_evalf(beep_handle, NULL, NULL, "vdd", beep_cmd, 0))
4928                         return -EIO;
4929         }
4930
4931         return 0;
4932 }
4933
4934 static struct ibm_struct beep_driver_data = {
4935         .name = "beep",
4936         .read = beep_read,
4937         .write = beep_write,
4938 };
4939
4940 /*************************************************************************
4941  * Thermal subdriver
4942  */
4943
4944 enum thermal_access_mode {
4945         TPACPI_THERMAL_NONE = 0,        /* No thermal support */
4946         TPACPI_THERMAL_ACPI_TMP07,      /* Use ACPI TMP0-7 */
4947         TPACPI_THERMAL_ACPI_UPDT,       /* Use ACPI TMP0-7 with UPDT */
4948         TPACPI_THERMAL_TPEC_8,          /* Use ACPI EC regs, 8 sensors */
4949         TPACPI_THERMAL_TPEC_16,         /* Use ACPI EC regs, 16 sensors */
4950 };
4951
4952 enum { /* TPACPI_THERMAL_TPEC_* */
4953         TP_EC_THERMAL_TMP0 = 0x78,      /* ACPI EC regs TMP 0..7 */
4954         TP_EC_THERMAL_TMP8 = 0xC0,      /* ACPI EC regs TMP 8..15 */
4955         TP_EC_THERMAL_TMP_NA = -128,    /* ACPI EC sensor not available */
4956 };
4957
4958 #define TPACPI_MAX_THERMAL_SENSORS 16   /* Max thermal sensors supported */
4959 struct ibm_thermal_sensors_struct {
4960         s32 temp[TPACPI_MAX_THERMAL_SENSORS];
4961 };
4962
4963 static enum thermal_access_mode thermal_read_mode;
4964
4965 /* idx is zero-based */
4966 static int thermal_get_sensor(int idx, s32 *value)
4967 {
4968         int t;
4969         s8 tmp;
4970         char tmpi[5];
4971
4972         t = TP_EC_THERMAL_TMP0;
4973
4974         switch (thermal_read_mode) {
4975 #if TPACPI_MAX_THERMAL_SENSORS >= 16
4976         case TPACPI_THERMAL_TPEC_16:
4977                 if (idx >= 8 && idx <= 15) {
4978                         t = TP_EC_THERMAL_TMP8;
4979                         idx -= 8;
4980                 }
4981                 /* fallthrough */
4982 #endif
4983         case TPACPI_THERMAL_TPEC_8:
4984                 if (idx <= 7) {
4985                         if (!acpi_ec_read(t + idx, &tmp))
4986                                 return -EIO;
4987                         *value = tmp * 1000;
4988                         return 0;
4989                 }
4990                 break;
4991
4992         case TPACPI_THERMAL_ACPI_UPDT:
4993                 if (idx <= 7) {
4994                         snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
4995                         if (!acpi_evalf(ec_handle, NULL, "UPDT", "v"))
4996                                 return -EIO;
4997                         if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
4998                                 return -EIO;
4999                         *value = (t - 2732) * 100;
5000                         return 0;
5001                 }
5002                 break;
5003
5004         case TPACPI_THERMAL_ACPI_TMP07:
5005                 if (idx <= 7) {
5006                         snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
5007                         if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
5008                                 return -EIO;
5009                         if (t > 127 || t < -127)
5010                                 t = TP_EC_THERMAL_TMP_NA;
5011                         *value = t * 1000;
5012                         return 0;
5013                 }
5014                 break;
5015
5016         case TPACPI_THERMAL_NONE:
5017         default:
5018                 return -ENOSYS;
5019         }
5020
5021         return -EINVAL;
5022 }
5023
5024 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s)
5025 {
5026         int res, i;
5027         int n;
5028
5029         n = 8;
5030         i = 0;
5031
5032         if (!s)
5033                 return -EINVAL;
5034
5035         if (thermal_read_mode == TPACPI_THERMAL_TPEC_16)
5036                 n = 16;
5037
5038         for (i = 0 ; i < n; i++) {
5039                 res = thermal_get_sensor(i, &s->temp[i]);
5040                 if (res)
5041                         return res;
5042         }
5043
5044         return n;
5045 }
5046
5047 /* sysfs temp##_input -------------------------------------------------- */
5048
5049 static ssize_t thermal_temp_input_show(struct device *dev,
5050                            struct device_attribute *attr,
5051                            char *buf)
5052 {
5053         struct sensor_device_attribute *sensor_attr =
5054                                         to_sensor_dev_attr(attr);
5055         int idx = sensor_attr->index;
5056         s32 value;
5057         int res;
5058
5059         res = thermal_get_sensor(idx, &value);
5060         if (res)
5061                 return res;
5062         if (value == TP_EC_THERMAL_TMP_NA * 1000)
5063                 return -ENXIO;
5064
5065         return snprintf(buf, PAGE_SIZE, "%d\n", value);
5066 }
5067
5068 #define THERMAL_SENSOR_ATTR_TEMP(_idxA, _idxB) \
5069          SENSOR_ATTR(temp##_idxA##_input, S_IRUGO, \
5070                      thermal_temp_input_show, NULL, _idxB)
5071
5072 static struct sensor_device_attribute sensor_dev_attr_thermal_temp_input[] = {
5073         THERMAL_SENSOR_ATTR_TEMP(1, 0),
5074         THERMAL_SENSOR_ATTR_TEMP(2, 1),
5075         THERMAL_SENSOR_ATTR_TEMP(3, 2),
5076         THERMAL_SENSOR_ATTR_TEMP(4, 3),
5077         THERMAL_SENSOR_ATTR_TEMP(5, 4),
5078         THERMAL_SENSOR_ATTR_TEMP(6, 5),
5079         THERMAL_SENSOR_ATTR_TEMP(7, 6),
5080         THERMAL_SENSOR_ATTR_TEMP(8, 7),
5081         THERMAL_SENSOR_ATTR_TEMP(9, 8),
5082         THERMAL_SENSOR_ATTR_TEMP(10, 9),
5083         THERMAL_SENSOR_ATTR_TEMP(11, 10),
5084         THERMAL_SENSOR_ATTR_TEMP(12, 11),
5085         THERMAL_SENSOR_ATTR_TEMP(13, 12),
5086         THERMAL_SENSOR_ATTR_TEMP(14, 13),
5087         THERMAL_SENSOR_ATTR_TEMP(15, 14),
5088         THERMAL_SENSOR_ATTR_TEMP(16, 15),
5089 };
5090
5091 #define THERMAL_ATTRS(X) \
5092         &sensor_dev_attr_thermal_temp_input[X].dev_attr.attr
5093
5094 static struct attribute *thermal_temp_input_attr[] = {
5095         THERMAL_ATTRS(8),
5096         THERMAL_ATTRS(9),
5097         THERMAL_ATTRS(10),
5098         THERMAL_ATTRS(11),
5099         THERMAL_ATTRS(12),
5100         THERMAL_ATTRS(13),
5101         THERMAL_ATTRS(14),
5102         THERMAL_ATTRS(15),
5103         THERMAL_ATTRS(0),
5104         THERMAL_ATTRS(1),
5105         THERMAL_ATTRS(2),
5106         THERMAL_ATTRS(3),
5107         THERMAL_ATTRS(4),
5108         THERMAL_ATTRS(5),
5109         THERMAL_ATTRS(6),
5110         THERMAL_ATTRS(7),
5111         NULL
5112 };
5113
5114 static const struct attribute_group thermal_temp_input16_group = {
5115         .attrs = thermal_temp_input_attr
5116 };
5117
5118 static const struct attribute_group thermal_temp_input8_group = {
5119         .attrs = &thermal_temp_input_attr[8]
5120 };
5121
5122 #undef THERMAL_SENSOR_ATTR_TEMP
5123 #undef THERMAL_ATTRS
5124
5125 /* --------------------------------------------------------------------- */
5126
5127 static int __init thermal_init(struct ibm_init_struct *iibm)
5128 {
5129         u8 t, ta1, ta2;
5130         int i;
5131         int acpi_tmp7;
5132         int res;
5133
5134         vdbg_printk(TPACPI_DBG_INIT, "initializing thermal subdriver\n");
5135
5136         acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv");
5137
5138         if (thinkpad_id.ec_model) {
5139                 /*
5140                  * Direct EC access mode: sensors at registers
5141                  * 0x78-0x7F, 0xC0-0xC7.  Registers return 0x00 for
5142                  * non-implemented, thermal sensors return 0x80 when
5143                  * not available
5144                  */
5145
5146                 ta1 = ta2 = 0;
5147                 for (i = 0; i < 8; i++) {
5148                         if (acpi_ec_read(TP_EC_THERMAL_TMP0 + i, &t)) {
5149                                 ta1 |= t;
5150                         } else {
5151                                 ta1 = 0;
5152                                 break;
5153                         }
5154                         if (acpi_ec_read(TP_EC_THERMAL_TMP8 + i, &t)) {
5155                                 ta2 |= t;
5156                         } else {
5157                                 ta1 = 0;
5158                                 break;
5159                         }
5160                 }
5161                 if (ta1 == 0) {
5162                         /* This is sheer paranoia, but we handle it anyway */
5163                         if (acpi_tmp7) {
5164                                 printk(TPACPI_ERR
5165                                        "ThinkPad ACPI EC access misbehaving, "
5166                                        "falling back to ACPI TMPx access "
5167                                        "mode\n");
5168                                 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
5169                         } else {
5170                                 printk(TPACPI_ERR
5171                                        "ThinkPad ACPI EC access misbehaving, "
5172                                        "disabling thermal sensors access\n");
5173                                 thermal_read_mode = TPACPI_THERMAL_NONE;
5174                         }
5175                 } else {
5176                         thermal_read_mode =
5177                             (ta2 != 0) ?
5178                             TPACPI_THERMAL_TPEC_16 : TPACPI_THERMAL_TPEC_8;
5179                 }
5180         } else if (acpi_tmp7) {
5181                 if (acpi_evalf(ec_handle, NULL, "UPDT", "qv")) {
5182                         /* 600e/x, 770e, 770x */
5183                         thermal_read_mode = TPACPI_THERMAL_ACPI_UPDT;
5184                 } else {
5185                         /* Standard ACPI TMPx access, max 8 sensors */
5186                         thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
5187                 }
5188         } else {
5189                 /* temperatures not supported on 570, G4x, R30, R31, R32 */
5190                 thermal_read_mode = TPACPI_THERMAL_NONE;
5191         }
5192
5193         vdbg_printk(TPACPI_DBG_INIT, "thermal is %s, mode %d\n",
5194                 str_supported(thermal_read_mode != TPACPI_THERMAL_NONE),
5195                 thermal_read_mode);
5196
5197         switch (thermal_read_mode) {
5198         case TPACPI_THERMAL_TPEC_16:
5199                 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
5200                                 &thermal_temp_input16_group);
5201                 if (res)
5202                         return res;
5203                 break;
5204         case TPACPI_THERMAL_TPEC_8:
5205         case TPACPI_THERMAL_ACPI_TMP07:
5206         case TPACPI_THERMAL_ACPI_UPDT:
5207                 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
5208                                 &thermal_temp_input8_group);
5209                 if (res)
5210                         return res;
5211                 break;
5212         case TPACPI_THERMAL_NONE:
5213         default:
5214                 return 1;
5215         }
5216
5217         return 0;
5218 }
5219
5220 static void thermal_exit(void)
5221 {
5222         switch (thermal_read_mode) {
5223         case TPACPI_THERMAL_TPEC_16:
5224                 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
5225                                    &thermal_temp_input16_group);
5226                 break;
5227         case TPACPI_THERMAL_TPEC_8:
5228         case TPACPI_THERMAL_ACPI_TMP07:
5229         case TPACPI_THERMAL_ACPI_UPDT:
5230                 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
5231                                    &thermal_temp_input16_group);
5232                 break;
5233         case TPACPI_THERMAL_NONE:
5234         default:
5235                 break;
5236         }
5237 }
5238
5239 static int thermal_read(char *p)
5240 {
5241         int len = 0;
5242         int n, i;
5243         struct ibm_thermal_sensors_struct t;
5244
5245         n = thermal_get_sensors(&t);
5246         if (unlikely(n < 0))
5247                 return n;
5248
5249         len += sprintf(p + len, "temperatures:\t");
5250
5251         if (n > 0) {
5252                 for (i = 0; i < (n - 1); i++)
5253                         len += sprintf(p + len, "%d ", t.temp[i] / 1000);
5254                 len += sprintf(p + len, "%d\n", t.temp[i] / 1000);
5255         } else
5256                 len += sprintf(p + len, "not supported\n");
5257
5258         return len;
5259 }
5260
5261 static struct ibm_struct thermal_driver_data = {
5262         .name = "thermal",
5263         .read = thermal_read,
5264         .exit = thermal_exit,
5265 };
5266
5267 /*************************************************************************
5268  * EC Dump subdriver
5269  */
5270
5271 static u8 ecdump_regs[256];
5272
5273 static int ecdump_read(char *p)
5274 {
5275         int len = 0;
5276         int i, j;
5277         u8 v;
5278
5279         len += sprintf(p + len, "EC      "
5280                        " +00 +01 +02 +03 +04 +05 +06 +07"
5281                        " +08 +09 +0a +0b +0c +0d +0e +0f\n");
5282         for (i = 0; i < 256; i += 16) {
5283                 len += sprintf(p + len, "EC 0x%02x:", i);
5284                 for (j = 0; j < 16; j++) {
5285                         if (!acpi_ec_read(i + j, &v))
5286                                 break;
5287                         if (v != ecdump_regs[i + j])
5288                                 len += sprintf(p + len, " *%02x", v);
5289                         else
5290                                 len += sprintf(p + len, "  %02x", v);
5291                         ecdump_regs[i + j] = v;
5292                 }
5293                 len += sprintf(p + len, "\n");
5294                 if (j != 16)
5295                         break;
5296         }
5297
5298         /* These are way too dangerous to advertise openly... */
5299 #if 0
5300         len += sprintf(p + len, "commands:\t0x<offset> 0x<value>"
5301                        " (<offset> is 00-ff, <value> is 00-ff)\n");
5302         len += sprintf(p + len, "commands:\t0x<offset> <value>  "
5303                        " (<offset> is 00-ff, <value> is 0-255)\n");
5304 #endif
5305         return len;
5306 }
5307
5308 static int ecdump_write(char *buf)
5309 {
5310         char *cmd;
5311         int i, v;
5312
5313         while ((cmd = next_cmd(&buf))) {
5314                 if (sscanf(cmd, "0x%x 0x%x", &i, &v) == 2) {
5315                         /* i and v set */
5316                 } else if (sscanf(cmd, "0x%x %u", &i, &v) == 2) {
5317                         /* i and v set */
5318                 } else
5319                         return -EINVAL;
5320                 if (i >= 0 && i < 256 && v >= 0 && v < 256) {
5321                         if (!acpi_ec_write(i, v))
5322                                 return -EIO;
5323                 } else
5324                         return -EINVAL;
5325         }
5326
5327         return 0;
5328 }
5329
5330 static struct ibm_struct ecdump_driver_data = {
5331         .name = "ecdump",
5332         .read = ecdump_read,
5333         .write = ecdump_write,
5334         .flags.experimental = 1,
5335 };
5336
5337 /*************************************************************************
5338  * Backlight/brightness subdriver
5339  */
5340
5341 #define TPACPI_BACKLIGHT_DEV_NAME "thinkpad_screen"
5342
5343 enum {
5344         TP_EC_BACKLIGHT = 0x31,
5345
5346         /* TP_EC_BACKLIGHT bitmasks */
5347         TP_EC_BACKLIGHT_LVLMSK = 0x1F,
5348         TP_EC_BACKLIGHT_CMDMSK = 0xE0,
5349         TP_EC_BACKLIGHT_MAPSW = 0x20,
5350 };
5351
5352 static struct backlight_device *ibm_backlight_device;
5353 static int brightness_mode;
5354 static unsigned int brightness_enable = 2; /* 2 = auto, 0 = no, 1 = yes */
5355
5356 static struct mutex brightness_mutex;
5357
5358 /*
5359  * ThinkPads can read brightness from two places: EC 0x31, or
5360  * CMOS NVRAM byte 0x5E, bits 0-3.
5361  *
5362  * EC 0x31 has the following layout
5363  *   Bit 7: unknown function
5364  *   Bit 6: unknown function
5365  *   Bit 5: Z: honour scale changes, NZ: ignore scale changes
5366  *   Bit 4: must be set to zero to avoid problems
5367  *   Bit 3-0: backlight brightness level
5368  *
5369  * brightness_get_raw returns status data in the EC 0x31 layout
5370  */
5371 static int brightness_get_raw(int *status)
5372 {
5373         u8 lec = 0, lcmos = 0, level = 0;
5374
5375         if (brightness_mode & 1) {
5376                 if (!acpi_ec_read(TP_EC_BACKLIGHT, &lec))
5377                         return -EIO;
5378                 level = lec & TP_EC_BACKLIGHT_LVLMSK;
5379         };
5380         if (brightness_mode & 2) {
5381                 lcmos = (nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS)
5382                          & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
5383                         >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
5384                 lcmos &= (tp_features.bright_16levels)? 0x0f : 0x07;
5385                 level = lcmos;
5386         }
5387
5388         if (brightness_mode == 3) {
5389                 *status = lec;  /* Prefer EC, CMOS is just a backing store */
5390                 lec &= TP_EC_BACKLIGHT_LVLMSK;
5391                 if (lec == lcmos)
5392                         tp_warned.bright_cmos_ec_unsync = 0;
5393                 else {
5394                         if (!tp_warned.bright_cmos_ec_unsync) {
5395                                 printk(TPACPI_ERR
5396                                         "CMOS NVRAM (%u) and EC (%u) do not "
5397                                         "agree on display brightness level\n",
5398                                         (unsigned int) lcmos,
5399                                         (unsigned int) lec);
5400                                 tp_warned.bright_cmos_ec_unsync = 1;
5401                         }
5402                         return -EIO;
5403                 }
5404         } else {
5405                 *status = level;
5406         }
5407
5408         return 0;
5409 }
5410
5411 /* May return EINTR which can always be mapped to ERESTARTSYS */
5412 static int brightness_set(int value)
5413 {
5414         int cmos_cmd, inc, i, res;
5415         int current_value;
5416         int command_bits;
5417
5418         if (value > ((tp_features.bright_16levels)? 15 : 7) ||
5419             value < 0)
5420                 return -EINVAL;
5421
5422         res = mutex_lock_killable(&brightness_mutex);
5423         if (res < 0)
5424                 return res;
5425
5426         res = brightness_get_raw(&current_value);
5427         if (res < 0)
5428                 goto errout;
5429
5430         command_bits = current_value & TP_EC_BACKLIGHT_CMDMSK;
5431         current_value &= TP_EC_BACKLIGHT_LVLMSK;
5432
5433         cmos_cmd = value > current_value ?
5434                         TP_CMOS_BRIGHTNESS_UP :
5435                         TP_CMOS_BRIGHTNESS_DOWN;
5436         inc = (value > current_value)? 1 : -1;
5437
5438         res = 0;
5439         for (i = current_value; i != value; i += inc) {
5440                 if ((brightness_mode & 2) &&
5441                     issue_thinkpad_cmos_command(cmos_cmd)) {
5442                         res = -EIO;
5443                         goto errout;
5444                 }
5445                 if ((brightness_mode & 1) &&
5446                     !acpi_ec_write(TP_EC_BACKLIGHT,
5447                                    (i + inc) | command_bits)) {
5448                         res = -EIO;
5449                         goto errout;;
5450                 }
5451         }
5452
5453 errout:
5454         mutex_unlock(&brightness_mutex);
5455         return res;
5456 }
5457
5458 /* sysfs backlight class ----------------------------------------------- */
5459
5460 static int brightness_update_status(struct backlight_device *bd)
5461 {
5462         /* it is the backlight class's job (caller) to handle
5463          * EINTR and other errors properly */
5464         return brightness_set(
5465                 (bd->props.fb_blank == FB_BLANK_UNBLANK &&
5466                  bd->props.power == FB_BLANK_UNBLANK) ?
5467                                 bd->props.brightness : 0);
5468 }
5469
5470 static int brightness_get(struct backlight_device *bd)
5471 {
5472         int status, res;
5473
5474         res = brightness_get_raw(&status);
5475         if (res < 0)
5476                 return 0; /* FIXME: teach backlight about error handling */
5477
5478         return status & TP_EC_BACKLIGHT_LVLMSK;
5479 }
5480
5481 static struct backlight_ops ibm_backlight_data = {
5482         .get_brightness = brightness_get,
5483         .update_status  = brightness_update_status,
5484 };
5485
5486 /* --------------------------------------------------------------------- */
5487
5488 static int __init brightness_init(struct ibm_init_struct *iibm)
5489 {
5490         int b;
5491
5492         vdbg_printk(TPACPI_DBG_INIT, "initializing brightness subdriver\n");
5493
5494         mutex_init(&brightness_mutex);
5495
5496         /*
5497          * We always attempt to detect acpi support, so as to switch
5498          * Lenovo Vista BIOS to ACPI brightness mode even if we are not
5499          * going to publish a backlight interface
5500          */
5501         b = tpacpi_check_std_acpi_brightness_support();
5502         if (b > 0) {
5503
5504                 if (acpi_video_backlight_support()) {
5505                         if (brightness_enable > 1) {
5506                                 printk(TPACPI_NOTICE
5507                                        "Standard ACPI backlight interface "
5508                                        "available, not loading native one.\n");
5509                                 return 1;
5510                         } else if (brightness_enable == 1) {
5511                                 printk(TPACPI_NOTICE
5512                                        "Backlight control force enabled, even if standard "
5513                                        "ACPI backlight interface is available\n");
5514                         }
5515                 } else {
5516                         if (brightness_enable > 1) {
5517                                 printk(TPACPI_NOTICE
5518                                        "Standard ACPI backlight interface not "
5519                                        "available, thinkpad_acpi native "
5520                                        "brightness control enabled\n");
5521                         }
5522                 }
5523         }
5524
5525         if (!brightness_enable) {
5526                 dbg_printk(TPACPI_DBG_INIT,
5527                            "brightness support disabled by "
5528                            "module parameter\n");
5529                 return 1;
5530         }
5531
5532         if (b > 16) {
5533                 printk(TPACPI_ERR
5534                        "Unsupported brightness interface, "
5535                        "please contact %s\n", TPACPI_MAIL);
5536                 return 1;
5537         }
5538         if (b == 16)
5539                 tp_features.bright_16levels = 1;
5540
5541         if (!brightness_mode) {
5542                 if (thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO)
5543                         brightness_mode = 2;
5544                 else
5545                         brightness_mode = 3;
5546
5547                 dbg_printk(TPACPI_DBG_INIT, "selected brightness_mode=%d\n",
5548                         brightness_mode);
5549         }
5550
5551         if (brightness_mode > 3)
5552                 return -EINVAL;
5553
5554         if (brightness_get_raw(&b) < 0)
5555                 return 1;
5556
5557         if (tp_features.bright_16levels)
5558                 printk(TPACPI_INFO
5559                        "detected a 16-level brightness capable ThinkPad\n");
5560
5561         ibm_backlight_device = backlight_device_register(
5562                                         TPACPI_BACKLIGHT_DEV_NAME, NULL, NULL,
5563                                         &ibm_backlight_data);
5564         if (IS_ERR(ibm_backlight_device)) {
5565                 printk(TPACPI_ERR "Could not register backlight device\n");
5566                 return PTR_ERR(ibm_backlight_device);
5567         }
5568         vdbg_printk(TPACPI_DBG_INIT, "brightness is supported\n");
5569
5570         ibm_backlight_device->props.max_brightness =
5571                                 (tp_features.bright_16levels)? 15 : 7;
5572         ibm_backlight_device->props.brightness = b & TP_EC_BACKLIGHT_LVLMSK;
5573         backlight_update_status(ibm_backlight_device);
5574
5575         return 0;
5576 }
5577
5578 static void brightness_exit(void)
5579 {
5580         if (ibm_backlight_device) {
5581                 vdbg_printk(TPACPI_DBG_EXIT,
5582                             "calling backlight_device_unregister()\n");
5583                 backlight_device_unregister(ibm_backlight_device);
5584         }
5585 }
5586
5587 static int brightness_read(char *p)
5588 {
5589         int len = 0;
5590         int level;
5591
5592         level = brightness_get(NULL);
5593         if (level < 0) {
5594                 len += sprintf(p + len, "level:\t\tunreadable\n");
5595         } else {
5596                 len += sprintf(p + len, "level:\t\t%d\n", level);
5597                 len += sprintf(p + len, "commands:\tup, down\n");
5598                 len += sprintf(p + len, "commands:\tlevel <level>"
5599                                " (<level> is 0-%d)\n",
5600                                (tp_features.bright_16levels) ? 15 : 7);
5601         }
5602
5603         return len;
5604 }
5605
5606 static int brightness_write(char *buf)
5607 {
5608         int level;
5609         int rc;
5610         char *cmd;
5611         int max_level = (tp_features.bright_16levels) ? 15 : 7;
5612
5613         level = brightness_get(NULL);
5614         if (level < 0)
5615                 return level;
5616
5617         while ((cmd = next_cmd(&buf))) {
5618                 if (strlencmp(cmd, "up") == 0) {
5619                         if (level < max_level)
5620                                 level++;
5621                 } else if (strlencmp(cmd, "down") == 0) {
5622                         if (level > 0)
5623                                 level--;
5624                 } else if (sscanf(cmd, "level %d", &level) == 1 &&
5625                            level >= 0 && level <= max_level) {
5626                         /* new level set */
5627                 } else
5628                         return -EINVAL;
5629         }
5630
5631         /*
5632          * Now we know what the final level should be, so we try to set it.
5633          * Doing it this way makes the syscall restartable in case of EINTR
5634          */
5635         rc = brightness_set(level);
5636         return (rc == -EINTR)? ERESTARTSYS : rc;
5637 }
5638
5639 static struct ibm_struct brightness_driver_data = {
5640         .name = "brightness",
5641         .read = brightness_read,
5642         .write = brightness_write,
5643         .exit = brightness_exit,
5644 };
5645
5646 /*************************************************************************
5647  * Volume subdriver
5648  */
5649
5650 static int volume_offset = 0x30;
5651
5652 static int volume_read(char *p)
5653 {
5654         int len = 0;
5655         u8 level;
5656
5657         if (!acpi_ec_read(volume_offset, &level)) {
5658                 len += sprintf(p + len, "level:\t\tunreadable\n");
5659         } else {
5660                 len += sprintf(p + len, "level:\t\t%d\n", level & 0xf);
5661                 len += sprintf(p + len, "mute:\t\t%s\n", onoff(level, 6));
5662                 len += sprintf(p + len, "commands:\tup, down, mute\n");
5663                 len += sprintf(p + len, "commands:\tlevel <level>"
5664                                " (<level> is 0-15)\n");
5665         }
5666
5667         return len;
5668 }
5669
5670 static int volume_write(char *buf)
5671 {
5672         int cmos_cmd, inc, i;
5673         u8 level, mute;
5674         int new_level, new_mute;
5675         char *cmd;
5676
5677         while ((cmd = next_cmd(&buf))) {
5678                 if (!acpi_ec_read(volume_offset, &level))
5679                         return -EIO;
5680                 new_mute = mute = level & 0x40;
5681                 new_level = level = level & 0xf;
5682
5683                 if (strlencmp(cmd, "up") == 0) {
5684                         if (mute)
5685                                 new_mute = 0;
5686                         else
5687                                 new_level = level == 15 ? 15 : level + 1;
5688                 } else if (strlencmp(cmd, "down") == 0) {
5689                         if (mute)
5690                                 new_mute = 0;
5691                         else
5692                                 new_level = level == 0 ? 0 : level - 1;
5693                 } else if (sscanf(cmd, "level %d", &new_level) == 1 &&
5694                            new_level >= 0 && new_level <= 15) {
5695                         /* new_level set */
5696                 } else if (strlencmp(cmd, "mute") == 0) {
5697                         new_mute = 0x40;
5698                 } else
5699                         return -EINVAL;
5700
5701                 if (new_level != level) {
5702                         /* mute doesn't change */
5703
5704                         cmos_cmd = (new_level > level) ?
5705                                         TP_CMOS_VOLUME_UP : TP_CMOS_VOLUME_DOWN;
5706                         inc = new_level > level ? 1 : -1;
5707
5708                         if (mute && (issue_thinkpad_cmos_command(cmos_cmd) ||
5709                                      !acpi_ec_write(volume_offset, level)))
5710                                 return -EIO;
5711
5712                         for (i = level; i != new_level; i += inc)
5713                                 if (issue_thinkpad_cmos_command(cmos_cmd) ||
5714                                     !acpi_ec_write(volume_offset, i + inc))
5715                                         return -EIO;
5716
5717                         if (mute &&
5718                             (issue_thinkpad_cmos_command(TP_CMOS_VOLUME_MUTE) ||
5719                              !acpi_ec_write(volume_offset, new_level + mute))) {
5720                                 return -EIO;
5721                         }
5722                 }
5723
5724                 if (new_mute != mute) {
5725                         /* level doesn't change */
5726
5727                         cmos_cmd = (new_mute) ?
5728                                    TP_CMOS_VOLUME_MUTE : TP_CMOS_VOLUME_UP;
5729
5730                         if (issue_thinkpad_cmos_command(cmos_cmd) ||
5731                             !acpi_ec_write(volume_offset, level + new_mute))
5732                                 return -EIO;
5733                 }
5734         }
5735
5736         return 0;
5737 }
5738
5739 static struct ibm_struct volume_driver_data = {
5740         .name = "volume",
5741         .read = volume_read,
5742         .write = volume_write,
5743 };
5744
5745 /*************************************************************************
5746  * Fan subdriver
5747  */
5748
5749 /*
5750  * FAN ACCESS MODES
5751  *
5752  * TPACPI_FAN_RD_ACPI_GFAN:
5753  *      ACPI GFAN method: returns fan level
5754  *
5755  *      see TPACPI_FAN_WR_ACPI_SFAN
5756  *      EC 0x2f (HFSP) not available if GFAN exists
5757  *
5758  * TPACPI_FAN_WR_ACPI_SFAN:
5759  *      ACPI SFAN method: sets fan level, 0 (stop) to 7 (max)
5760  *
5761  *      EC 0x2f (HFSP) might be available *for reading*, but do not use
5762  *      it for writing.
5763  *
5764  * TPACPI_FAN_WR_TPEC:
5765  *      ThinkPad EC register 0x2f (HFSP): fan control loop mode
5766  *      Supported on almost all ThinkPads
5767  *
5768  *      Fan speed changes of any sort (including those caused by the
5769  *      disengaged mode) are usually done slowly by the firmware as the
5770  *      maximum ammount of fan duty cycle change per second seems to be
5771  *      limited.
5772  *
5773  *      Reading is not available if GFAN exists.
5774  *      Writing is not available if SFAN exists.
5775  *
5776  *      Bits
5777  *       7      automatic mode engaged;
5778  *              (default operation mode of the ThinkPad)
5779  *              fan level is ignored in this mode.
5780  *       6      full speed mode (takes precedence over bit 7);
5781  *              not available on all thinkpads.  May disable
5782  *              the tachometer while the fan controller ramps up
5783  *              the speed (which can take up to a few *minutes*).
5784  *              Speeds up fan to 100% duty-cycle, which is far above
5785  *              the standard RPM levels.  It is not impossible that
5786  *              it could cause hardware damage.
5787  *      5-3     unused in some models.  Extra bits for fan level
5788  *              in others, but still useless as all values above
5789  *              7 map to the same speed as level 7 in these models.
5790  *      2-0     fan level (0..7 usually)
5791  *                      0x00 = stop
5792  *                      0x07 = max (set when temperatures critical)
5793  *              Some ThinkPads may have other levels, see
5794  *              TPACPI_FAN_WR_ACPI_FANS (X31/X40/X41)
5795  *
5796  *      FIRMWARE BUG: on some models, EC 0x2f might not be initialized at
5797  *      boot. Apparently the EC does not intialize it, so unless ACPI DSDT
5798  *      does so, its initial value is meaningless (0x07).
5799  *
5800  *      For firmware bugs, refer to:
5801  *      http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
5802  *
5803  *      ----
5804  *
5805  *      ThinkPad EC register 0x84 (LSB), 0x85 (MSB):
5806  *      Main fan tachometer reading (in RPM)
5807  *
5808  *      This register is present on all ThinkPads with a new-style EC, and
5809  *      it is known not to be present on the A21m/e, and T22, as there is
5810  *      something else in offset 0x84 according to the ACPI DSDT.  Other
5811  *      ThinkPads from this same time period (and earlier) probably lack the
5812  *      tachometer as well.
5813  *
5814  *      Unfortunately a lot of ThinkPads with new-style ECs but whose firwmare
5815  *      was never fixed by IBM to report the EC firmware version string
5816  *      probably support the tachometer (like the early X models), so
5817  *      detecting it is quite hard.  We need more data to know for sure.
5818  *
5819  *      FIRMWARE BUG: always read 0x84 first, otherwise incorrect readings
5820  *      might result.
5821  *
5822  *      FIRMWARE BUG: may go stale while the EC is switching to full speed
5823  *      mode.
5824  *
5825  *      For firmware bugs, refer to:
5826  *      http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
5827  *
5828  * TPACPI_FAN_WR_ACPI_FANS:
5829  *      ThinkPad X31, X40, X41.  Not available in the X60.
5830  *
5831  *      FANS ACPI handle: takes three arguments: low speed, medium speed,
5832  *      high speed.  ACPI DSDT seems to map these three speeds to levels
5833  *      as follows: STOP LOW LOW MED MED HIGH HIGH HIGH HIGH
5834  *      (this map is stored on FAN0..FAN8 as "0,1,1,2,2,3,3,3,3")
5835  *
5836  *      The speeds are stored on handles
5837  *      (FANA:FAN9), (FANC:FANB), (FANE:FAND).
5838  *
5839  *      There are three default speed sets, acessible as handles:
5840  *      FS1L,FS1M,FS1H; FS2L,FS2M,FS2H; FS3L,FS3M,FS3H
5841  *
5842  *      ACPI DSDT switches which set is in use depending on various
5843  *      factors.
5844  *
5845  *      TPACPI_FAN_WR_TPEC is also available and should be used to
5846  *      command the fan.  The X31/X40/X41 seems to have 8 fan levels,
5847  *      but the ACPI tables just mention level 7.
5848  */
5849
5850 enum {                                  /* Fan control constants */
5851         fan_status_offset = 0x2f,       /* EC register 0x2f */
5852         fan_rpm_offset = 0x84,          /* EC register 0x84: LSB, 0x85 MSB (RPM)
5853                                          * 0x84 must be read before 0x85 */
5854
5855         TP_EC_FAN_FULLSPEED = 0x40,     /* EC fan mode: full speed */
5856         TP_EC_FAN_AUTO      = 0x80,     /* EC fan mode: auto fan control */
5857
5858         TPACPI_FAN_LAST_LEVEL = 0x100,  /* Use cached last-seen fan level */
5859 };
5860
5861 enum fan_status_access_mode {
5862         TPACPI_FAN_NONE = 0,            /* No fan status or control */
5863         TPACPI_FAN_RD_ACPI_GFAN,        /* Use ACPI GFAN */
5864         TPACPI_FAN_RD_TPEC,             /* Use ACPI EC regs 0x2f, 0x84-0x85 */
5865 };
5866
5867 enum fan_control_access_mode {
5868         TPACPI_FAN_WR_NONE = 0,         /* No fan control */
5869         TPACPI_FAN_WR_ACPI_SFAN,        /* Use ACPI SFAN */
5870         TPACPI_FAN_WR_TPEC,             /* Use ACPI EC reg 0x2f */
5871         TPACPI_FAN_WR_ACPI_FANS,        /* Use ACPI FANS and EC reg 0x2f */
5872 };
5873
5874 enum fan_control_commands {
5875         TPACPI_FAN_CMD_SPEED    = 0x0001,       /* speed command */
5876         TPACPI_FAN_CMD_LEVEL    = 0x0002,       /* level command  */
5877         TPACPI_FAN_CMD_ENABLE   = 0x0004,       /* enable/disable cmd,
5878                                                  * and also watchdog cmd */
5879 };
5880
5881 static int fan_control_allowed;
5882
5883 static enum fan_status_access_mode fan_status_access_mode;
5884 static enum fan_control_access_mode fan_control_access_mode;
5885 static enum fan_control_commands fan_control_commands;
5886
5887 static u8 fan_control_initial_status;
5888 static u8 fan_control_desired_level;
5889 static u8 fan_control_resume_level;
5890 static int fan_watchdog_maxinterval;
5891
5892 static struct mutex fan_mutex;
5893
5894 static void fan_watchdog_fire(struct work_struct *ignored);
5895 static DECLARE_DELAYED_WORK(fan_watchdog_task, fan_watchdog_fire);
5896
5897 TPACPI_HANDLE(fans, ec, "FANS");        /* X31, X40, X41 */
5898 TPACPI_HANDLE(gfan, ec, "GFAN", /* 570 */
5899            "\\FSPD",            /* 600e/x, 770e, 770x */
5900            );                   /* all others */
5901 TPACPI_HANDLE(sfan, ec, "SFAN", /* 570 */
5902            "JFNS",              /* 770x-JL */
5903            );                   /* all others */
5904
5905 /*
5906  * Unitialized HFSP quirk: ACPI DSDT and EC fail to initialize the
5907  * HFSP register at boot, so it contains 0x07 but the Thinkpad could
5908  * be in auto mode (0x80).
5909  *
5910  * This is corrected by any write to HFSP either by the driver, or
5911  * by the firmware.
5912  *
5913  * We assume 0x07 really means auto mode while this quirk is active,
5914  * as this is far more likely than the ThinkPad being in level 7,
5915  * which is only used by the firmware during thermal emergencies.
5916  */
5917
5918 static void fan_quirk1_detect(void)
5919 {
5920         /* In some ThinkPads, neither the EC nor the ACPI
5921          * DSDT initialize the HFSP register, and it ends up
5922          * being initially set to 0x07 when it *could* be
5923          * either 0x07 or 0x80.
5924          *
5925          * Enable for TP-1Y (T43), TP-78 (R51e),
5926          * TP-76 (R52), TP-70 (T43, R52), which are known
5927          * to be buggy. */
5928         if (fan_control_initial_status == 0x07) {
5929                 switch (thinkpad_id.ec_model) {
5930                 case 0x5931: /* TP-1Y */
5931                 case 0x3837: /* TP-78 */
5932                 case 0x3637: /* TP-76 */
5933                 case 0x3037: /* TP-70 */
5934                         printk(TPACPI_NOTICE
5935                                "fan_init: initial fan status is unknown, "
5936                                "assuming it is in auto mode\n");
5937                         tp_features.fan_ctrl_status_undef = 1;
5938                         ;;
5939                 }
5940         }
5941 }
5942
5943 static void fan_quirk1_handle(u8 *fan_status)
5944 {
5945         if (unlikely(tp_features.fan_ctrl_status_undef)) {
5946                 if (*fan_status != fan_control_initial_status) {
5947                         /* something changed the HFSP regisnter since
5948                          * driver init time, so it is not undefined
5949                          * anymore */
5950                         tp_features.fan_ctrl_status_undef = 0;
5951                 } else {
5952                         /* Return most likely status. In fact, it
5953                          * might be the only possible status */
5954                         *fan_status = TP_EC_FAN_AUTO;
5955                 }
5956         }
5957 }
5958
5959 /*
5960  * Call with fan_mutex held
5961  */
5962 static void fan_update_desired_level(u8 status)
5963 {
5964         if ((status &
5965              (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
5966                 if (status > 7)
5967                         fan_control_desired_level = 7;
5968                 else
5969                         fan_control_desired_level = status;
5970         }
5971 }
5972
5973 static int fan_get_status(u8 *status)
5974 {
5975         u8 s;
5976
5977         /* TODO:
5978          * Add TPACPI_FAN_RD_ACPI_FANS ? */
5979
5980         switch (fan_status_access_mode) {
5981         case TPACPI_FAN_RD_ACPI_GFAN:
5982                 /* 570, 600e/x, 770e, 770x */
5983
5984                 if (unlikely(!acpi_evalf(gfan_handle, &s, NULL, "d")))
5985                         return -EIO;
5986
5987                 if (likely(status))
5988                         *status = s & 0x07;
5989
5990                 break;
5991
5992         case TPACPI_FAN_RD_TPEC:
5993                 /* all except 570, 600e/x, 770e, 770x */
5994                 if (unlikely(!acpi_ec_read(fan_status_offset, &s)))
5995                         return -EIO;
5996
5997                 if (likely(status)) {
5998                         *status = s;
5999                         fan_quirk1_handle(status);
6000                 }
6001
6002                 break;
6003
6004         default:
6005                 return -ENXIO;
6006         }
6007
6008         return 0;
6009 }
6010
6011 static int fan_get_status_safe(u8 *status)
6012 {
6013         int rc;
6014         u8 s;
6015
6016         if (mutex_lock_killable(&fan_mutex))
6017                 return -ERESTARTSYS;
6018         rc = fan_get_status(&s);
6019         if (!rc)
6020                 fan_update_desired_level(s);
6021         mutex_unlock(&fan_mutex);
6022
6023         if (status)
6024                 *status = s;
6025
6026         return rc;
6027 }
6028
6029 static int fan_get_speed(unsigned int *speed)
6030 {
6031         u8 hi, lo;
6032
6033         switch (fan_status_access_mode) {
6034         case TPACPI_FAN_RD_TPEC:
6035                 /* all except 570, 600e/x, 770e, 770x */
6036                 if (unlikely(!acpi_ec_read(fan_rpm_offset, &lo) ||
6037                              !acpi_ec_read(fan_rpm_offset + 1, &hi)))
6038                         return -EIO;
6039
6040                 if (likely(speed))
6041                         *speed = (hi << 8) | lo;
6042
6043                 break;
6044
6045         default:
6046                 return -ENXIO;
6047         }
6048
6049         return 0;
6050 }
6051
6052 static int fan_set_level(int level)
6053 {
6054         if (!fan_control_allowed)
6055                 return -EPERM;
6056
6057         switch (fan_control_access_mode) {
6058         case TPACPI_FAN_WR_ACPI_SFAN:
6059                 if (level >= 0 && level <= 7) {
6060                         if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level))
6061                                 return -EIO;
6062                 } else
6063                         return -EINVAL;
6064                 break;
6065
6066         case TPACPI_FAN_WR_ACPI_FANS:
6067         case TPACPI_FAN_WR_TPEC:
6068                 if (!(level & TP_EC_FAN_AUTO) &&
6069                     !(level & TP_EC_FAN_FULLSPEED) &&
6070                     ((level < 0) || (level > 7)))
6071                         return -EINVAL;
6072
6073                 /* safety net should the EC not support AUTO
6074                  * or FULLSPEED mode bits and just ignore them */
6075                 if (level & TP_EC_FAN_FULLSPEED)
6076                         level |= 7;     /* safety min speed 7 */
6077                 else if (level & TP_EC_FAN_AUTO)
6078                         level |= 4;     /* safety min speed 4 */
6079
6080                 if (!acpi_ec_write(fan_status_offset, level))
6081                         return -EIO;
6082                 else
6083                         tp_features.fan_ctrl_status_undef = 0;
6084                 break;
6085
6086         default:
6087                 return -ENXIO;
6088         }
6089         return 0;
6090 }
6091
6092 static int fan_set_level_safe(int level)
6093 {
6094         int rc;
6095
6096         if (!fan_control_allowed)
6097                 return -EPERM;
6098
6099         if (mutex_lock_killable(&fan_mutex))
6100                 return -ERESTARTSYS;
6101
6102         if (level == TPACPI_FAN_LAST_LEVEL)
6103                 level = fan_control_desired_level;
6104
6105         rc = fan_set_level(level);
6106         if (!rc)
6107                 fan_update_desired_level(level);
6108
6109         mutex_unlock(&fan_mutex);
6110         return rc;
6111 }
6112
6113 static int fan_set_enable(void)
6114 {
6115         u8 s;
6116         int rc;
6117
6118         if (!fan_control_allowed)
6119                 return -EPERM;
6120
6121         if (mutex_lock_killable(&fan_mutex))
6122                 return -ERESTARTSYS;
6123
6124         switch (fan_control_access_mode) {
6125         case TPACPI_FAN_WR_ACPI_FANS:
6126         case TPACPI_FAN_WR_TPEC:
6127                 rc = fan_get_status(&s);
6128                 if (rc < 0)
6129                         break;
6130
6131                 /* Don't go out of emergency fan mode */
6132                 if (s != 7) {
6133                         s &= 0x07;
6134                         s |= TP_EC_FAN_AUTO | 4; /* min fan speed 4 */
6135                 }
6136
6137                 if (!acpi_ec_write(fan_status_offset, s))
6138                         rc = -EIO;
6139                 else {
6140                         tp_features.fan_ctrl_status_undef = 0;
6141                         rc = 0;
6142                 }
6143                 break;
6144
6145         case TPACPI_FAN_WR_ACPI_SFAN:
6146                 rc = fan_get_status(&s);
6147                 if (rc < 0)
6148                         break;
6149
6150                 s &= 0x07;
6151
6152                 /* Set fan to at least level 4 */
6153                 s |= 4;
6154
6155                 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", s))
6156                         rc = -EIO;
6157                 else
6158                         rc = 0;
6159                 break;
6160
6161         default:
6162                 rc = -ENXIO;
6163         }
6164
6165         mutex_unlock(&fan_mutex);
6166         return rc;
6167 }
6168
6169 static int fan_set_disable(void)
6170 {
6171         int rc;
6172
6173         if (!fan_control_allowed)
6174                 return -EPERM;
6175
6176         if (mutex_lock_killable(&fan_mutex))
6177                 return -ERESTARTSYS;
6178
6179         rc = 0;
6180         switch (fan_control_access_mode) {
6181         case TPACPI_FAN_WR_ACPI_FANS:
6182         case TPACPI_FAN_WR_TPEC:
6183                 if (!acpi_ec_write(fan_status_offset, 0x00))
6184                         rc = -EIO;
6185                 else {
6186                         fan_control_desired_level = 0;
6187                         tp_features.fan_ctrl_status_undef = 0;
6188                 }
6189                 break;
6190
6191         case TPACPI_FAN_WR_ACPI_SFAN:
6192                 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", 0x00))
6193                         rc = -EIO;
6194                 else
6195                         fan_control_desired_level = 0;
6196                 break;
6197
6198         default:
6199                 rc = -ENXIO;
6200         }
6201
6202
6203         mutex_unlock(&fan_mutex);
6204         return rc;
6205 }
6206
6207 static int fan_set_speed(int speed)
6208 {
6209         int rc;
6210
6211         if (!fan_control_allowed)
6212                 return -EPERM;
6213
6214         if (mutex_lock_killable(&fan_mutex))
6215                 return -ERESTARTSYS;
6216
6217         rc = 0;
6218         switch (fan_control_access_mode) {
6219         case TPACPI_FAN_WR_ACPI_FANS:
6220                 if (speed >= 0 && speed <= 65535) {
6221                         if (!acpi_evalf(fans_handle, NULL, NULL, "vddd",
6222                                         speed, speed, speed))
6223                                 rc = -EIO;
6224                 } else
6225                         rc = -EINVAL;
6226                 break;
6227
6228         default:
6229                 rc = -ENXIO;
6230         }
6231
6232         mutex_unlock(&fan_mutex);
6233         return rc;
6234 }
6235
6236 static void fan_watchdog_reset(void)
6237 {
6238         static int fan_watchdog_active;
6239
6240         if (fan_control_access_mode == TPACPI_FAN_WR_NONE)
6241                 return;
6242
6243         if (fan_watchdog_active)
6244                 cancel_delayed_work(&fan_watchdog_task);
6245
6246         if (fan_watchdog_maxinterval > 0 &&
6247             tpacpi_lifecycle != TPACPI_LIFE_EXITING) {
6248                 fan_watchdog_active = 1;
6249                 if (!queue_delayed_work(tpacpi_wq, &fan_watchdog_task,
6250                                 msecs_to_jiffies(fan_watchdog_maxinterval
6251                                                  * 1000))) {
6252                         printk(TPACPI_ERR
6253                                "failed to queue the fan watchdog, "
6254                                "watchdog will not trigger\n");
6255                 }
6256         } else
6257                 fan_watchdog_active = 0;
6258 }
6259
6260 static void fan_watchdog_fire(struct work_struct *ignored)
6261 {
6262         int rc;
6263
6264         if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
6265                 return;
6266
6267         printk(TPACPI_NOTICE "fan watchdog: enabling fan\n");
6268         rc = fan_set_enable();
6269         if (rc < 0) {
6270                 printk(TPACPI_ERR "fan watchdog: error %d while enabling fan, "
6271                         "will try again later...\n", -rc);
6272                 /* reschedule for later */
6273                 fan_watchdog_reset();
6274         }
6275 }
6276
6277 /*
6278  * SYSFS fan layout: hwmon compatible (device)
6279  *
6280  * pwm*_enable:
6281  *      0: "disengaged" mode
6282  *      1: manual mode
6283  *      2: native EC "auto" mode (recommended, hardware default)
6284  *
6285  * pwm*: set speed in manual mode, ignored otherwise.
6286  *      0 is level 0; 255 is level 7. Intermediate points done with linear
6287  *      interpolation.
6288  *
6289  * fan*_input: tachometer reading, RPM
6290  *
6291  *
6292  * SYSFS fan layout: extensions
6293  *
6294  * fan_watchdog (driver):
6295  *      fan watchdog interval in seconds, 0 disables (default), max 120
6296  */
6297
6298 /* sysfs fan pwm1_enable ----------------------------------------------- */
6299 static ssize_t fan_pwm1_enable_show(struct device *dev,
6300                                     struct device_attribute *attr,
6301                                     char *buf)
6302 {
6303         int res, mode;
6304         u8 status;
6305
6306         res = fan_get_status_safe(&status);
6307         if (res)
6308                 return res;
6309
6310         if (status & TP_EC_FAN_FULLSPEED) {
6311                 mode = 0;
6312         } else if (status & TP_EC_FAN_AUTO) {
6313                 mode = 2;
6314         } else
6315                 mode = 1;
6316
6317         return snprintf(buf, PAGE_SIZE, "%d\n", mode);
6318 }
6319
6320 static ssize_t fan_pwm1_enable_store(struct device *dev,
6321                                      struct device_attribute *attr,
6322                                      const char *buf, size_t count)
6323 {
6324         unsigned long t;
6325         int res, level;
6326
6327         if (parse_strtoul(buf, 2, &t))
6328                 return -EINVAL;
6329
6330         switch (t) {
6331         case 0:
6332                 level = TP_EC_FAN_FULLSPEED;
6333                 break;
6334         case 1:
6335                 level = TPACPI_FAN_LAST_LEVEL;
6336                 break;
6337         case 2:
6338                 level = TP_EC_FAN_AUTO;
6339                 break;
6340         case 3:
6341                 /* reserved for software-controlled auto mode */
6342                 return -ENOSYS;
6343         default:
6344                 return -EINVAL;
6345         }
6346
6347         res = fan_set_level_safe(level);
6348         if (res == -ENXIO)
6349                 return -EINVAL;
6350         else if (res < 0)
6351                 return res;
6352
6353         fan_watchdog_reset();
6354
6355         return count;
6356 }
6357
6358 static struct device_attribute dev_attr_fan_pwm1_enable =
6359         __ATTR(pwm1_enable, S_IWUSR | S_IRUGO,
6360                 fan_pwm1_enable_show, fan_pwm1_enable_store);
6361
6362 /* sysfs fan pwm1 ------------------------------------------------------ */
6363 static ssize_t fan_pwm1_show(struct device *dev,
6364                              struct device_attribute *attr,
6365                              char *buf)
6366 {
6367         int res;
6368         u8 status;
6369
6370         res = fan_get_status_safe(&status);
6371         if (res)
6372                 return res;
6373
6374         if ((status &
6375              (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) != 0)
6376                 status = fan_control_desired_level;
6377
6378         if (status > 7)
6379                 status = 7;
6380
6381         return snprintf(buf, PAGE_SIZE, "%u\n", (status * 255) / 7);
6382 }
6383
6384 static ssize_t fan_pwm1_store(struct device *dev,
6385                               struct device_attribute *attr,
6386                               const char *buf, size_t count)
6387 {
6388         unsigned long s;
6389         int rc;
6390         u8 status, newlevel;
6391
6392         if (parse_strtoul(buf, 255, &s))
6393                 return -EINVAL;
6394
6395         /* scale down from 0-255 to 0-7 */
6396         newlevel = (s >> 5) & 0x07;
6397
6398         if (mutex_lock_killable(&fan_mutex))
6399                 return -ERESTARTSYS;
6400
6401         rc = fan_get_status(&status);
6402         if (!rc && (status &
6403                     (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
6404                 rc = fan_set_level(newlevel);
6405                 if (rc == -ENXIO)
6406                         rc = -EINVAL;
6407                 else if (!rc) {
6408                         fan_update_desired_level(newlevel);
6409                         fan_watchdog_reset();
6410                 }
6411         }
6412
6413         mutex_unlock(&fan_mutex);
6414         return (rc)? rc : count;
6415 }
6416
6417 static struct device_attribute dev_attr_fan_pwm1 =
6418         __ATTR(pwm1, S_IWUSR | S_IRUGO,
6419                 fan_pwm1_show, fan_pwm1_store);
6420
6421 /* sysfs fan fan1_input ------------------------------------------------ */
6422 static ssize_t fan_fan1_input_show(struct device *dev,
6423                            struct device_attribute *attr,
6424                            char *buf)
6425 {
6426         int res;
6427         unsigned int speed;
6428
6429         res = fan_get_speed(&speed);
6430         if (res < 0)
6431                 return res;
6432
6433         return snprintf(buf, PAGE_SIZE, "%u\n", speed);
6434 }
6435
6436 static struct device_attribute dev_attr_fan_fan1_input =
6437         __ATTR(fan1_input, S_IRUGO,
6438                 fan_fan1_input_show, NULL);
6439
6440 /* sysfs fan fan_watchdog (hwmon driver) ------------------------------- */
6441 static ssize_t fan_fan_watchdog_show(struct device_driver *drv,
6442                                      char *buf)
6443 {
6444         return snprintf(buf, PAGE_SIZE, "%u\n", fan_watchdog_maxinterval);
6445 }
6446
6447 static ssize_t fan_fan_watchdog_store(struct device_driver *drv,
6448                                       const char *buf, size_t count)
6449 {
6450         unsigned long t;
6451
6452         if (parse_strtoul(buf, 120, &t))
6453                 return -EINVAL;
6454
6455         if (!fan_control_allowed)
6456                 return -EPERM;
6457
6458         fan_watchdog_maxinterval = t;
6459         fan_watchdog_reset();
6460
6461         return count;
6462 }
6463
6464 static DRIVER_ATTR(fan_watchdog, S_IWUSR | S_IRUGO,
6465                 fan_fan_watchdog_show, fan_fan_watchdog_store);
6466
6467 /* --------------------------------------------------------------------- */
6468 static struct attribute *fan_attributes[] = {
6469         &dev_attr_fan_pwm1_enable.attr, &dev_attr_fan_pwm1.attr,
6470         &dev_attr_fan_fan1_input.attr,
6471         NULL
6472 };
6473
6474 static const struct attribute_group fan_attr_group = {
6475         .attrs = fan_attributes,
6476 };
6477
6478 static int __init fan_init(struct ibm_init_struct *iibm)
6479 {
6480         int rc;
6481
6482         vdbg_printk(TPACPI_DBG_INIT, "initializing fan subdriver\n");
6483
6484         mutex_init(&fan_mutex);
6485         fan_status_access_mode = TPACPI_FAN_NONE;
6486         fan_control_access_mode = TPACPI_FAN_WR_NONE;
6487         fan_control_commands = 0;
6488         fan_watchdog_maxinterval = 0;
6489         tp_features.fan_ctrl_status_undef = 0;
6490         fan_control_desired_level = 7;
6491
6492         TPACPI_ACPIHANDLE_INIT(fans);
6493         TPACPI_ACPIHANDLE_INIT(gfan);
6494         TPACPI_ACPIHANDLE_INIT(sfan);
6495
6496         if (gfan_handle) {
6497                 /* 570, 600e/x, 770e, 770x */
6498                 fan_status_access_mode = TPACPI_FAN_RD_ACPI_GFAN;
6499         } else {
6500                 /* all other ThinkPads: note that even old-style
6501                  * ThinkPad ECs supports the fan control register */
6502                 if (likely(acpi_ec_read(fan_status_offset,
6503                                         &fan_control_initial_status))) {
6504                         fan_status_access_mode = TPACPI_FAN_RD_TPEC;
6505                         fan_quirk1_detect();
6506                 } else {
6507                         printk(TPACPI_ERR
6508                                "ThinkPad ACPI EC access misbehaving, "
6509                                "fan status and control unavailable\n");
6510                         return 1;
6511                 }
6512         }
6513
6514         if (sfan_handle) {
6515                 /* 570, 770x-JL */
6516                 fan_control_access_mode = TPACPI_FAN_WR_ACPI_SFAN;
6517                 fan_control_commands |=
6518                     TPACPI_FAN_CMD_LEVEL | TPACPI_FAN_CMD_ENABLE;
6519         } else {
6520                 if (!gfan_handle) {
6521                         /* gfan without sfan means no fan control */
6522                         /* all other models implement TP EC 0x2f control */
6523
6524                         if (fans_handle) {
6525                                 /* X31, X40, X41 */
6526                                 fan_control_access_mode =
6527                                     TPACPI_FAN_WR_ACPI_FANS;
6528                                 fan_control_commands |=
6529                                     TPACPI_FAN_CMD_SPEED |
6530                                     TPACPI_FAN_CMD_LEVEL |
6531                                     TPACPI_FAN_CMD_ENABLE;
6532                         } else {
6533                                 fan_control_access_mode = TPACPI_FAN_WR_TPEC;
6534                                 fan_control_commands |=
6535                                     TPACPI_FAN_CMD_LEVEL |
6536                                     TPACPI_FAN_CMD_ENABLE;
6537                         }
6538                 }
6539         }
6540
6541         vdbg_printk(TPACPI_DBG_INIT, "fan is %s, modes %d, %d\n",
6542                 str_supported(fan_status_access_mode != TPACPI_FAN_NONE ||
6543                   fan_control_access_mode != TPACPI_FAN_WR_NONE),
6544                 fan_status_access_mode, fan_control_access_mode);
6545
6546         /* fan control master switch */
6547         if (!fan_control_allowed) {
6548                 fan_control_access_mode = TPACPI_FAN_WR_NONE;
6549                 fan_control_commands = 0;
6550                 dbg_printk(TPACPI_DBG_INIT,
6551                            "fan control features disabled by parameter\n");
6552         }
6553
6554         /* update fan_control_desired_level */
6555         if (fan_status_access_mode != TPACPI_FAN_NONE)
6556                 fan_get_status_safe(NULL);
6557
6558         if (fan_status_access_mode != TPACPI_FAN_NONE ||
6559             fan_control_access_mode != TPACPI_FAN_WR_NONE) {
6560                 rc = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
6561                                          &fan_attr_group);
6562                 if (rc < 0)
6563                         return rc;
6564
6565                 rc = driver_create_file(&tpacpi_hwmon_pdriver.driver,
6566                                         &driver_attr_fan_watchdog);
6567                 if (rc < 0) {
6568                         sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
6569                                         &fan_attr_group);
6570                         return rc;
6571                 }
6572                 return 0;
6573         } else
6574                 return 1;
6575 }
6576
6577 static void fan_exit(void)
6578 {
6579         vdbg_printk(TPACPI_DBG_EXIT,
6580                     "cancelling any pending fan watchdog tasks\n");
6581
6582         /* FIXME: can we really do this unconditionally? */
6583         sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj, &fan_attr_group);
6584         driver_remove_file(&tpacpi_hwmon_pdriver.driver,
6585                            &driver_attr_fan_watchdog);
6586
6587         cancel_delayed_work(&fan_watchdog_task);
6588         flush_workqueue(tpacpi_wq);
6589 }
6590
6591 static void fan_suspend(pm_message_t state)
6592 {
6593         int rc;
6594
6595         if (!fan_control_allowed)
6596                 return;
6597
6598         /* Store fan status in cache */
6599         fan_control_resume_level = 0;
6600         rc = fan_get_status_safe(&fan_control_resume_level);
6601         if (rc < 0)
6602                 printk(TPACPI_NOTICE
6603                         "failed to read fan level for later "
6604                         "restore during resume: %d\n", rc);
6605
6606         /* if it is undefined, don't attempt to restore it.
6607          * KEEP THIS LAST */
6608         if (tp_features.fan_ctrl_status_undef)
6609                 fan_control_resume_level = 0;
6610 }
6611
6612 static void fan_resume(void)
6613 {
6614         u8 current_level = 7;
6615         bool do_set = false;
6616         int rc;
6617
6618         /* DSDT *always* updates status on resume */
6619         tp_features.fan_ctrl_status_undef = 0;
6620
6621         if (!fan_control_allowed ||
6622             !fan_control_resume_level ||
6623             (fan_get_status_safe(&current_level) < 0))
6624                 return;
6625
6626         switch (fan_control_access_mode) {
6627         case TPACPI_FAN_WR_ACPI_SFAN:
6628                 /* never decrease fan level */
6629                 do_set = (fan_control_resume_level > current_level);
6630                 break;
6631         case TPACPI_FAN_WR_ACPI_FANS:
6632         case TPACPI_FAN_WR_TPEC:
6633                 /* never decrease fan level, scale is:
6634                  * TP_EC_FAN_FULLSPEED > 7 >= TP_EC_FAN_AUTO
6635                  *
6636                  * We expect the firmware to set either 7 or AUTO, but we
6637                  * handle FULLSPEED out of paranoia.
6638                  *
6639                  * So, we can safely only restore FULLSPEED or 7, anything
6640                  * else could slow the fan.  Restoring AUTO is useless, at
6641                  * best that's exactly what the DSDT already set (it is the
6642                  * slower it uses).
6643                  *
6644                  * Always keep in mind that the DSDT *will* have set the
6645                  * fans to what the vendor supposes is the best level.  We
6646                  * muck with it only to speed the fan up.
6647                  */
6648                 if (fan_control_resume_level != 7 &&
6649                     !(fan_control_resume_level & TP_EC_FAN_FULLSPEED))
6650                         return;
6651                 else
6652                         do_set = !(current_level & TP_EC_FAN_FULLSPEED) &&
6653                                  (current_level != fan_control_resume_level);
6654                 break;
6655         default:
6656                 return;
6657         }
6658         if (do_set) {
6659                 printk(TPACPI_NOTICE
6660                         "restoring fan level to 0x%02x\n",
6661                         fan_control_resume_level);
6662                 rc = fan_set_level_safe(fan_control_resume_level);
6663                 if (rc < 0)
6664                         printk(TPACPI_NOTICE
6665                                 "failed to restore fan level: %d\n", rc);
6666         }
6667 }
6668
6669 static int fan_read(char *p)
6670 {
6671         int len = 0;
6672         int rc;
6673         u8 status;
6674         unsigned int speed = 0;
6675
6676         switch (fan_status_access_mode) {
6677         case TPACPI_FAN_RD_ACPI_GFAN:
6678                 /* 570, 600e/x, 770e, 770x */
6679                 rc = fan_get_status_safe(&status);
6680                 if (rc < 0)
6681                         return rc;
6682
6683                 len += sprintf(p + len, "status:\t\t%s\n"
6684                                "level:\t\t%d\n",
6685                                (status != 0) ? "enabled" : "disabled", status);
6686                 break;
6687
6688         case TPACPI_FAN_RD_TPEC:
6689                 /* all except 570, 600e/x, 770e, 770x */
6690                 rc = fan_get_status_safe(&status);
6691                 if (rc < 0)
6692                         return rc;
6693
6694                 len += sprintf(p + len, "status:\t\t%s\n",
6695                                (status != 0) ? "enabled" : "disabled");
6696
6697                 rc = fan_get_speed(&speed);
6698                 if (rc < 0)
6699                         return rc;
6700
6701                 len += sprintf(p + len, "speed:\t\t%d\n", speed);
6702
6703                 if (status & TP_EC_FAN_FULLSPEED)
6704                         /* Disengaged mode takes precedence */
6705                         len += sprintf(p + len, "level:\t\tdisengaged\n");
6706                 else if (status & TP_EC_FAN_AUTO)
6707                         len += sprintf(p + len, "level:\t\tauto\n");
6708                 else
6709                         len += sprintf(p + len, "level:\t\t%d\n", status);
6710                 break;
6711
6712         case TPACPI_FAN_NONE:
6713         default:
6714                 len += sprintf(p + len, "status:\t\tnot supported\n");
6715         }
6716
6717         if (fan_control_commands & TPACPI_FAN_CMD_LEVEL) {
6718                 len += sprintf(p + len, "commands:\tlevel <level>");
6719
6720                 switch (fan_control_access_mode) {
6721                 case TPACPI_FAN_WR_ACPI_SFAN:
6722                         len += sprintf(p + len, " (<level> is 0-7)\n");
6723                         break;
6724
6725                 default:
6726                         len += sprintf(p + len, " (<level> is 0-7, "
6727                                        "auto, disengaged, full-speed)\n");
6728                         break;
6729                 }
6730         }
6731
6732         if (fan_control_commands & TPACPI_FAN_CMD_ENABLE)
6733                 len += sprintf(p + len, "commands:\tenable, disable\n"
6734                                "commands:\twatchdog <timeout> (<timeout> "
6735                                "is 0 (off), 1-120 (seconds))\n");
6736
6737         if (fan_control_commands & TPACPI_FAN_CMD_SPEED)
6738                 len += sprintf(p + len, "commands:\tspeed <speed>"
6739                                " (<speed> is 0-65535)\n");
6740
6741         return len;
6742 }
6743
6744 static int fan_write_cmd_level(const char *cmd, int *rc)
6745 {
6746         int level;
6747
6748         if (strlencmp(cmd, "level auto") == 0)
6749                 level = TP_EC_FAN_AUTO;
6750         else if ((strlencmp(cmd, "level disengaged") == 0) |
6751                         (strlencmp(cmd, "level full-speed") == 0))
6752                 level = TP_EC_FAN_FULLSPEED;
6753         else if (sscanf(cmd, "level %d", &level) != 1)
6754                 return 0;
6755
6756         *rc = fan_set_level_safe(level);
6757         if (*rc == -ENXIO)
6758                 printk(TPACPI_ERR "level command accepted for unsupported "
6759                        "access mode %d", fan_control_access_mode);
6760
6761         return 1;
6762 }
6763
6764 static int fan_write_cmd_enable(const char *cmd, int *rc)
6765 {
6766         if (strlencmp(cmd, "enable") != 0)
6767                 return 0;
6768
6769         *rc = fan_set_enable();
6770         if (*rc == -ENXIO)
6771                 printk(TPACPI_ERR "enable command accepted for unsupported "
6772                        "access mode %d", fan_control_access_mode);
6773
6774         return 1;
6775 }
6776
6777 static int fan_write_cmd_disable(const char *cmd, int *rc)
6778 {
6779         if (strlencmp(cmd, "disable") != 0)
6780                 return 0;
6781
6782         *rc = fan_set_disable();
6783         if (*rc == -ENXIO)
6784                 printk(TPACPI_ERR "disable command accepted for unsupported "
6785                        "access mode %d", fan_control_access_mode);
6786
6787         return 1;
6788 }
6789
6790 static int fan_write_cmd_speed(const char *cmd, int *rc)
6791 {
6792         int speed;
6793
6794         /* TODO:
6795          * Support speed <low> <medium> <high> ? */
6796
6797         if (sscanf(cmd, "speed %d", &speed) != 1)
6798                 return 0;
6799
6800         *rc = fan_set_speed(speed);
6801         if (*rc == -ENXIO)
6802                 printk(TPACPI_ERR "speed command accepted for unsupported "
6803                        "access mode %d", fan_control_access_mode);
6804
6805         return 1;
6806 }
6807
6808 static int fan_write_cmd_watchdog(const char *cmd, int *rc)
6809 {
6810         int interval;
6811
6812         if (sscanf(cmd, "watchdog %d", &interval) != 1)
6813                 return 0;
6814
6815         if (interval < 0 || interval > 120)
6816                 *rc = -EINVAL;
6817         else
6818                 fan_watchdog_maxinterval = interval;
6819
6820         return 1;
6821 }
6822
6823 static int fan_write(char *buf)
6824 {
6825         char *cmd;
6826         int rc = 0;
6827
6828         while (!rc && (cmd = next_cmd(&buf))) {
6829                 if (!((fan_control_commands & TPACPI_FAN_CMD_LEVEL) &&
6830                       fan_write_cmd_level(cmd, &rc)) &&
6831                     !((fan_control_commands & TPACPI_FAN_CMD_ENABLE) &&
6832                       (fan_write_cmd_enable(cmd, &rc) ||
6833                        fan_write_cmd_disable(cmd, &rc) ||
6834                        fan_write_cmd_watchdog(cmd, &rc))) &&
6835                     !((fan_control_commands & TPACPI_FAN_CMD_SPEED) &&
6836                       fan_write_cmd_speed(cmd, &rc))
6837                     )
6838                         rc = -EINVAL;
6839                 else if (!rc)
6840                         fan_watchdog_reset();
6841         }
6842
6843         return rc;
6844 }
6845
6846 static struct ibm_struct fan_driver_data = {
6847         .name = "fan",
6848         .read = fan_read,
6849         .write = fan_write,
6850         .exit = fan_exit,
6851         .suspend = fan_suspend,
6852         .resume = fan_resume,
6853 };
6854
6855 /****************************************************************************
6856  ****************************************************************************
6857  *
6858  * Infrastructure
6859  *
6860  ****************************************************************************
6861  ****************************************************************************/
6862
6863 /* sysfs name ---------------------------------------------------------- */
6864 static ssize_t thinkpad_acpi_pdev_name_show(struct device *dev,
6865                            struct device_attribute *attr,
6866                            char *buf)
6867 {
6868         return snprintf(buf, PAGE_SIZE, "%s\n", TPACPI_NAME);
6869 }
6870
6871 static struct device_attribute dev_attr_thinkpad_acpi_pdev_name =
6872         __ATTR(name, S_IRUGO, thinkpad_acpi_pdev_name_show, NULL);
6873
6874 /* --------------------------------------------------------------------- */
6875
6876 /* /proc support */
6877 static struct proc_dir_entry *proc_dir;
6878
6879 /*
6880  * Module and infrastructure proble, init and exit handling
6881  */
6882
6883 static int force_load;
6884
6885 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
6886 static const char * __init str_supported(int is_supported)
6887 {
6888         static char text_unsupported[] __initdata = "not supported";
6889
6890         return (is_supported)? &text_unsupported[4] : &text_unsupported[0];
6891 }
6892 #endif /* CONFIG_THINKPAD_ACPI_DEBUG */
6893
6894 static void ibm_exit(struct ibm_struct *ibm)
6895 {
6896         dbg_printk(TPACPI_DBG_EXIT, "removing %s\n", ibm->name);
6897
6898         list_del_init(&ibm->all_drivers);
6899
6900         if (ibm->flags.acpi_notify_installed) {
6901                 dbg_printk(TPACPI_DBG_EXIT,
6902                         "%s: acpi_remove_notify_handler\n", ibm->name);
6903                 BUG_ON(!ibm->acpi);
6904                 acpi_remove_notify_handler(*ibm->acpi->handle,
6905                                            ibm->acpi->type,
6906                                            dispatch_acpi_notify);
6907                 ibm->flags.acpi_notify_installed = 0;
6908                 ibm->flags.acpi_notify_installed = 0;
6909         }
6910
6911         if (ibm->flags.proc_created) {
6912                 dbg_printk(TPACPI_DBG_EXIT,
6913                         "%s: remove_proc_entry\n", ibm->name);
6914                 remove_proc_entry(ibm->name, proc_dir);
6915                 ibm->flags.proc_created = 0;
6916         }
6917
6918         if (ibm->flags.acpi_driver_registered) {
6919                 dbg_printk(TPACPI_DBG_EXIT,
6920                         "%s: acpi_bus_unregister_driver\n", ibm->name);
6921                 BUG_ON(!ibm->acpi);
6922                 acpi_bus_unregister_driver(ibm->acpi->driver);
6923                 kfree(ibm->acpi->driver);
6924                 ibm->acpi->driver = NULL;
6925                 ibm->flags.acpi_driver_registered = 0;
6926         }
6927
6928         if (ibm->flags.init_called && ibm->exit) {
6929                 ibm->exit();
6930                 ibm->flags.init_called = 0;
6931         }
6932
6933         dbg_printk(TPACPI_DBG_INIT, "finished removing %s\n", ibm->name);
6934 }
6935
6936 static int __init ibm_init(struct ibm_init_struct *iibm)
6937 {
6938         int ret;
6939         struct ibm_struct *ibm = iibm->data;
6940         struct proc_dir_entry *entry;
6941
6942         BUG_ON(ibm == NULL);
6943
6944         INIT_LIST_HEAD(&ibm->all_drivers);
6945
6946         if (ibm->flags.experimental && !experimental)
6947                 return 0;
6948
6949         dbg_printk(TPACPI_DBG_INIT,
6950                 "probing for %s\n", ibm->name);
6951
6952         if (iibm->init) {
6953                 ret = iibm->init(iibm);
6954                 if (ret > 0)
6955                         return 0;       /* probe failed */
6956                 if (ret)
6957                         return ret;
6958
6959                 ibm->flags.init_called = 1;
6960         }
6961
6962         if (ibm->acpi) {
6963                 if (ibm->acpi->hid) {
6964                         ret = register_tpacpi_subdriver(ibm);
6965                         if (ret)
6966                                 goto err_out;
6967                 }
6968
6969                 if (ibm->acpi->notify) {
6970                         ret = setup_acpi_notify(ibm);
6971                         if (ret == -ENODEV) {
6972                                 printk(TPACPI_NOTICE "disabling subdriver %s\n",
6973                                         ibm->name);
6974                                 ret = 0;
6975                                 goto err_out;
6976                         }
6977                         if (ret < 0)
6978                                 goto err_out;
6979                 }
6980         }
6981
6982         dbg_printk(TPACPI_DBG_INIT,
6983                 "%s installed\n", ibm->name);
6984
6985         if (ibm->read) {
6986                 entry = create_proc_entry(ibm->name,
6987                                           S_IFREG | S_IRUGO | S_IWUSR,
6988                                           proc_dir);
6989                 if (!entry) {
6990                         printk(TPACPI_ERR "unable to create proc entry %s\n",
6991                                ibm->name);
6992                         ret = -ENODEV;
6993                         goto err_out;
6994                 }
6995                 entry->owner = THIS_MODULE;
6996                 entry->data = ibm;
6997                 entry->read_proc = &dispatch_procfs_read;
6998                 if (ibm->write)
6999                         entry->write_proc = &dispatch_procfs_write;
7000                 ibm->flags.proc_created = 1;
7001         }
7002
7003         list_add_tail(&ibm->all_drivers, &tpacpi_all_drivers);
7004
7005         return 0;
7006
7007 err_out:
7008         dbg_printk(TPACPI_DBG_INIT,
7009                 "%s: at error exit path with result %d\n",
7010                 ibm->name, ret);
7011
7012         ibm_exit(ibm);
7013         return (ret < 0)? ret : 0;
7014 }
7015
7016 /* Probing */
7017
7018 /* returns 0 - probe ok, or < 0 - probe error.
7019  * Probe ok doesn't mean thinkpad found.
7020  * On error, kfree() cleanup on tp->* is not performed, caller must do it */
7021 static int __must_check __init get_thinkpad_model_data(
7022                                                 struct thinkpad_id_data *tp)
7023 {
7024         const struct dmi_device *dev = NULL;
7025         char ec_fw_string[18];
7026         char const *s;
7027
7028         if (!tp)
7029                 return -EINVAL;
7030
7031         memset(tp, 0, sizeof(*tp));
7032
7033         if (dmi_name_in_vendors("IBM"))
7034                 tp->vendor = PCI_VENDOR_ID_IBM;
7035         else if (dmi_name_in_vendors("LENOVO"))
7036                 tp->vendor = PCI_VENDOR_ID_LENOVO;
7037         else
7038                 return 0;
7039
7040         s = dmi_get_system_info(DMI_BIOS_VERSION);
7041         tp->bios_version_str = kstrdup(s, GFP_KERNEL);
7042         if (s && !tp->bios_version_str)
7043                 return -ENOMEM;
7044         if (!tp->bios_version_str)
7045                 return 0;
7046         tp->bios_model = tp->bios_version_str[0]
7047                          | (tp->bios_version_str[1] << 8);
7048
7049         /*
7050          * ThinkPad T23 or newer, A31 or newer, R50e or newer,
7051          * X32 or newer, all Z series;  Some models must have an
7052          * up-to-date BIOS or they will not be detected.
7053          *
7054          * See http://thinkwiki.org/wiki/List_of_DMI_IDs
7055          */
7056         while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) {
7057                 if (sscanf(dev->name,
7058                            "IBM ThinkPad Embedded Controller -[%17c",
7059                            ec_fw_string) == 1) {
7060                         ec_fw_string[sizeof(ec_fw_string) - 1] = 0;
7061                         ec_fw_string[strcspn(ec_fw_string, " ]")] = 0;
7062
7063                         tp->ec_version_str = kstrdup(ec_fw_string, GFP_KERNEL);
7064                         if (!tp->ec_version_str)
7065                                 return -ENOMEM;
7066                         tp->ec_model = ec_fw_string[0]
7067                                         | (ec_fw_string[1] << 8);
7068                         break;
7069                 }
7070         }
7071
7072         s = dmi_get_system_info(DMI_PRODUCT_VERSION);
7073         if (s && !strnicmp(s, "ThinkPad", 8)) {
7074                 tp->model_str = kstrdup(s, GFP_KERNEL);
7075                 if (!tp->model_str)
7076                         return -ENOMEM;
7077         }
7078
7079         s = dmi_get_system_info(DMI_PRODUCT_NAME);
7080         tp->nummodel_str = kstrdup(s, GFP_KERNEL);
7081         if (s && !tp->nummodel_str)
7082                 return -ENOMEM;
7083
7084         return 0;
7085 }
7086
7087 static int __init probe_for_thinkpad(void)
7088 {
7089         int is_thinkpad;
7090
7091         if (acpi_disabled)
7092                 return -ENODEV;
7093
7094         /*
7095          * Non-ancient models have better DMI tagging, but very old models
7096          * don't.
7097          */
7098         is_thinkpad = (thinkpad_id.model_str != NULL);
7099
7100         /* ec is required because many other handles are relative to it */
7101         TPACPI_ACPIHANDLE_INIT(ec);
7102         if (!ec_handle) {
7103                 if (is_thinkpad)
7104                         printk(TPACPI_ERR
7105                                 "Not yet supported ThinkPad detected!\n");
7106                 return -ENODEV;
7107         }
7108
7109         /*
7110          * Risks a regression on very old machines, but reduces potential
7111          * false positives a damn great deal
7112          */
7113         if (!is_thinkpad)
7114                 is_thinkpad = (thinkpad_id.vendor == PCI_VENDOR_ID_IBM);
7115
7116         if (!is_thinkpad && !force_load)
7117                 return -ENODEV;
7118
7119         return 0;
7120 }
7121
7122
7123 /* Module init, exit, parameters */
7124
7125 static struct ibm_init_struct ibms_init[] __initdata = {
7126         {
7127                 .init = thinkpad_acpi_driver_init,
7128                 .data = &thinkpad_acpi_driver_data,
7129         },
7130         {
7131                 .init = hotkey_init,
7132                 .data = &hotkey_driver_data,
7133         },
7134         {
7135                 .init = bluetooth_init,
7136                 .data = &bluetooth_driver_data,
7137         },
7138         {
7139                 .init = wan_init,
7140                 .data = &wan_driver_data,
7141         },
7142         {
7143                 .init = uwb_init,
7144                 .data = &uwb_driver_data,
7145         },
7146 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
7147         {
7148                 .init = video_init,
7149                 .data = &video_driver_data,
7150         },
7151 #endif
7152         {
7153                 .init = light_init,
7154                 .data = &light_driver_data,
7155         },
7156 #ifdef CONFIG_THINKPAD_ACPI_DOCK
7157         {
7158                 .init = dock_init,
7159                 .data = &dock_driver_data[0],
7160         },
7161         {
7162                 .init = dock_init2,
7163                 .data = &dock_driver_data[1],
7164         },
7165 #endif
7166 #ifdef CONFIG_THINKPAD_ACPI_BAY
7167         {
7168                 .init = bay_init,
7169                 .data = &bay_driver_data,
7170         },
7171 #endif
7172         {
7173                 .init = cmos_init,
7174                 .data = &cmos_driver_data,
7175         },
7176         {
7177                 .init = led_init,
7178                 .data = &led_driver_data,
7179         },
7180         {
7181                 .init = beep_init,
7182                 .data = &beep_driver_data,
7183         },
7184         {
7185                 .init = thermal_init,
7186                 .data = &thermal_driver_data,
7187         },
7188         {
7189                 .data = &ecdump_driver_data,
7190         },
7191         {
7192                 .init = brightness_init,
7193                 .data = &brightness_driver_data,
7194         },
7195         {
7196                 .data = &volume_driver_data,
7197         },
7198         {
7199                 .init = fan_init,
7200                 .data = &fan_driver_data,
7201         },
7202 };
7203
7204 static int __init set_ibm_param(const char *val, struct kernel_param *kp)
7205 {
7206         unsigned int i;
7207         struct ibm_struct *ibm;
7208
7209         if (!kp || !kp->name || !val)
7210                 return -EINVAL;
7211
7212         for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
7213                 ibm = ibms_init[i].data;
7214                 WARN_ON(ibm == NULL);
7215
7216                 if (!ibm || !ibm->name)
7217                         continue;
7218
7219                 if (strcmp(ibm->name, kp->name) == 0 && ibm->write) {
7220                         if (strlen(val) > sizeof(ibms_init[i].param) - 2)
7221                                 return -ENOSPC;
7222                         strcpy(ibms_init[i].param, val);
7223                         strcat(ibms_init[i].param, ",");
7224                         return 0;
7225                 }
7226         }
7227
7228         return -EINVAL;
7229 }
7230
7231 module_param(experimental, int, 0);
7232 MODULE_PARM_DESC(experimental,
7233                  "Enables experimental features when non-zero");
7234
7235 module_param_named(debug, dbg_level, uint, 0);
7236 MODULE_PARM_DESC(debug, "Sets debug level bit-mask");
7237
7238 module_param(force_load, bool, 0);
7239 MODULE_PARM_DESC(force_load,
7240                  "Attempts to load the driver even on a "
7241                  "mis-identified ThinkPad when true");
7242
7243 module_param_named(fan_control, fan_control_allowed, bool, 0);
7244 MODULE_PARM_DESC(fan_control,
7245                  "Enables setting fan parameters features when true");
7246
7247 module_param_named(brightness_mode, brightness_mode, int, 0);
7248 MODULE_PARM_DESC(brightness_mode,
7249                  "Selects brightness control strategy: "
7250                  "0=auto, 1=EC, 2=CMOS, 3=both");
7251
7252 module_param(brightness_enable, uint, 0);
7253 MODULE_PARM_DESC(brightness_enable,
7254                  "Enables backlight control when 1, disables when 0");
7255
7256 module_param(hotkey_report_mode, uint, 0);
7257 MODULE_PARM_DESC(hotkey_report_mode,
7258                  "used for backwards compatibility with userspace, "
7259                  "see documentation");
7260
7261 #define TPACPI_PARAM(feature) \
7262         module_param_call(feature, set_ibm_param, NULL, NULL, 0); \
7263         MODULE_PARM_DESC(feature, "Simulates thinkpad-acpi procfs command " \
7264                          "at module load, see documentation")
7265
7266 TPACPI_PARAM(hotkey);
7267 TPACPI_PARAM(bluetooth);
7268 TPACPI_PARAM(video);
7269 TPACPI_PARAM(light);
7270 #ifdef CONFIG_THINKPAD_ACPI_DOCK
7271 TPACPI_PARAM(dock);
7272 #endif
7273 #ifdef CONFIG_THINKPAD_ACPI_BAY
7274 TPACPI_PARAM(bay);
7275 #endif /* CONFIG_THINKPAD_ACPI_BAY */
7276 TPACPI_PARAM(cmos);
7277 TPACPI_PARAM(led);
7278 TPACPI_PARAM(beep);
7279 TPACPI_PARAM(ecdump);
7280 TPACPI_PARAM(brightness);
7281 TPACPI_PARAM(volume);
7282 TPACPI_PARAM(fan);
7283
7284 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
7285 module_param(dbg_wlswemul, uint, 0);
7286 MODULE_PARM_DESC(dbg_wlswemul, "Enables WLSW emulation");
7287 module_param_named(wlsw_state, tpacpi_wlsw_emulstate, bool, 0);
7288 MODULE_PARM_DESC(wlsw_state,
7289                  "Initial state of the emulated WLSW switch");
7290
7291 module_param(dbg_bluetoothemul, uint, 0);
7292 MODULE_PARM_DESC(dbg_bluetoothemul, "Enables bluetooth switch emulation");
7293 module_param_named(bluetooth_state, tpacpi_bluetooth_emulstate, bool, 0);
7294 MODULE_PARM_DESC(bluetooth_state,
7295                  "Initial state of the emulated bluetooth switch");
7296
7297 module_param(dbg_wwanemul, uint, 0);
7298 MODULE_PARM_DESC(dbg_wwanemul, "Enables WWAN switch emulation");
7299 module_param_named(wwan_state, tpacpi_wwan_emulstate, bool, 0);
7300 MODULE_PARM_DESC(wwan_state,
7301                  "Initial state of the emulated WWAN switch");
7302
7303 module_param(dbg_uwbemul, uint, 0);
7304 MODULE_PARM_DESC(dbg_uwbemul, "Enables UWB switch emulation");
7305 module_param_named(uwb_state, tpacpi_uwb_emulstate, bool, 0);
7306 MODULE_PARM_DESC(uwb_state,
7307                  "Initial state of the emulated UWB switch");
7308 #endif
7309
7310 static void thinkpad_acpi_module_exit(void)
7311 {
7312         struct ibm_struct *ibm, *itmp;
7313
7314         tpacpi_lifecycle = TPACPI_LIFE_EXITING;
7315
7316         list_for_each_entry_safe_reverse(ibm, itmp,
7317                                          &tpacpi_all_drivers,
7318                                          all_drivers) {
7319                 ibm_exit(ibm);
7320         }
7321
7322         dbg_printk(TPACPI_DBG_INIT, "finished subdriver exit path...\n");
7323
7324         if (tpacpi_inputdev) {
7325                 if (tp_features.input_device_registered)
7326                         input_unregister_device(tpacpi_inputdev);
7327                 else
7328                         input_free_device(tpacpi_inputdev);
7329         }
7330
7331         if (tpacpi_hwmon)
7332                 hwmon_device_unregister(tpacpi_hwmon);
7333
7334         if (tp_features.sensors_pdev_attrs_registered)
7335                 device_remove_file(&tpacpi_sensors_pdev->dev,
7336                                    &dev_attr_thinkpad_acpi_pdev_name);
7337         if (tpacpi_sensors_pdev)
7338                 platform_device_unregister(tpacpi_sensors_pdev);
7339         if (tpacpi_pdev)
7340                 platform_device_unregister(tpacpi_pdev);
7341
7342         if (tp_features.sensors_pdrv_attrs_registered)
7343                 tpacpi_remove_driver_attributes(&tpacpi_hwmon_pdriver.driver);
7344         if (tp_features.platform_drv_attrs_registered)
7345                 tpacpi_remove_driver_attributes(&tpacpi_pdriver.driver);
7346
7347         if (tp_features.sensors_pdrv_registered)
7348                 platform_driver_unregister(&tpacpi_hwmon_pdriver);
7349
7350         if (tp_features.platform_drv_registered)
7351                 platform_driver_unregister(&tpacpi_pdriver);
7352
7353         if (proc_dir)
7354                 remove_proc_entry(TPACPI_PROC_DIR, acpi_root_dir);
7355
7356         if (tpacpi_wq)
7357                 destroy_workqueue(tpacpi_wq);
7358
7359         kfree(thinkpad_id.bios_version_str);
7360         kfree(thinkpad_id.ec_version_str);
7361         kfree(thinkpad_id.model_str);
7362 }
7363
7364
7365 static int __init thinkpad_acpi_module_init(void)
7366 {
7367         int ret, i;
7368
7369         tpacpi_lifecycle = TPACPI_LIFE_INIT;
7370
7371         /* Parameter checking */
7372         if (hotkey_report_mode > 2)
7373                 return -EINVAL;
7374
7375         /* Driver-level probe */
7376
7377         ret = get_thinkpad_model_data(&thinkpad_id);
7378         if (ret) {
7379                 printk(TPACPI_ERR
7380                         "unable to get DMI data: %d\n", ret);
7381                 thinkpad_acpi_module_exit();
7382                 return ret;
7383         }
7384         ret = probe_for_thinkpad();
7385         if (ret) {
7386                 thinkpad_acpi_module_exit();
7387                 return ret;
7388         }
7389
7390         /* Driver initialization */
7391
7392         TPACPI_ACPIHANDLE_INIT(ecrd);
7393         TPACPI_ACPIHANDLE_INIT(ecwr);
7394
7395         tpacpi_wq = create_singlethread_workqueue(TPACPI_WORKQUEUE_NAME);
7396         if (!tpacpi_wq) {
7397                 thinkpad_acpi_module_exit();
7398                 return -ENOMEM;
7399         }
7400
7401         proc_dir = proc_mkdir(TPACPI_PROC_DIR, acpi_root_dir);
7402         if (!proc_dir) {
7403                 printk(TPACPI_ERR
7404                        "unable to create proc dir " TPACPI_PROC_DIR);
7405                 thinkpad_acpi_module_exit();
7406                 return -ENODEV;
7407         }
7408         proc_dir->owner = THIS_MODULE;
7409
7410         ret = platform_driver_register(&tpacpi_pdriver);
7411         if (ret) {
7412                 printk(TPACPI_ERR
7413                        "unable to register main platform driver\n");
7414                 thinkpad_acpi_module_exit();
7415                 return ret;
7416         }
7417         tp_features.platform_drv_registered = 1;
7418
7419         ret = platform_driver_register(&tpacpi_hwmon_pdriver);
7420         if (ret) {
7421                 printk(TPACPI_ERR
7422                        "unable to register hwmon platform driver\n");
7423                 thinkpad_acpi_module_exit();
7424                 return ret;
7425         }
7426         tp_features.sensors_pdrv_registered = 1;
7427
7428         ret = tpacpi_create_driver_attributes(&tpacpi_pdriver.driver);
7429         if (!ret) {
7430                 tp_features.platform_drv_attrs_registered = 1;
7431                 ret = tpacpi_create_driver_attributes(
7432                                         &tpacpi_hwmon_pdriver.driver);
7433         }
7434         if (ret) {
7435                 printk(TPACPI_ERR
7436                        "unable to create sysfs driver attributes\n");
7437                 thinkpad_acpi_module_exit();
7438                 return ret;
7439         }
7440         tp_features.sensors_pdrv_attrs_registered = 1;
7441
7442
7443         /* Device initialization */
7444         tpacpi_pdev = platform_device_register_simple(TPACPI_DRVR_NAME, -1,
7445                                                         NULL, 0);
7446         if (IS_ERR(tpacpi_pdev)) {
7447                 ret = PTR_ERR(tpacpi_pdev);
7448                 tpacpi_pdev = NULL;
7449                 printk(TPACPI_ERR "unable to register platform device\n");
7450                 thinkpad_acpi_module_exit();
7451                 return ret;
7452         }
7453         tpacpi_sensors_pdev = platform_device_register_simple(
7454                                                 TPACPI_HWMON_DRVR_NAME,
7455                                                 -1, NULL, 0);
7456         if (IS_ERR(tpacpi_sensors_pdev)) {
7457                 ret = PTR_ERR(tpacpi_sensors_pdev);
7458                 tpacpi_sensors_pdev = NULL;
7459                 printk(TPACPI_ERR
7460                        "unable to register hwmon platform device\n");
7461                 thinkpad_acpi_module_exit();
7462                 return ret;
7463         }
7464         ret = device_create_file(&tpacpi_sensors_pdev->dev,
7465                                  &dev_attr_thinkpad_acpi_pdev_name);
7466         if (ret) {
7467                 printk(TPACPI_ERR
7468                        "unable to create sysfs hwmon device attributes\n");
7469                 thinkpad_acpi_module_exit();
7470                 return ret;
7471         }
7472         tp_features.sensors_pdev_attrs_registered = 1;
7473         tpacpi_hwmon = hwmon_device_register(&tpacpi_sensors_pdev->dev);
7474         if (IS_ERR(tpacpi_hwmon)) {
7475                 ret = PTR_ERR(tpacpi_hwmon);
7476                 tpacpi_hwmon = NULL;
7477                 printk(TPACPI_ERR "unable to register hwmon device\n");
7478                 thinkpad_acpi_module_exit();
7479                 return ret;
7480         }
7481         mutex_init(&tpacpi_inputdev_send_mutex);
7482         tpacpi_inputdev = input_allocate_device();
7483         if (!tpacpi_inputdev) {
7484                 printk(TPACPI_ERR "unable to allocate input device\n");
7485                 thinkpad_acpi_module_exit();
7486                 return -ENOMEM;
7487         } else {
7488                 /* Prepare input device, but don't register */
7489                 tpacpi_inputdev->name = "ThinkPad Extra Buttons";
7490                 tpacpi_inputdev->phys = TPACPI_DRVR_NAME "/input0";
7491                 tpacpi_inputdev->id.bustype = BUS_HOST;
7492                 tpacpi_inputdev->id.vendor = (thinkpad_id.vendor) ?
7493                                                 thinkpad_id.vendor :
7494                                                 PCI_VENDOR_ID_IBM;
7495                 tpacpi_inputdev->id.product = TPACPI_HKEY_INPUT_PRODUCT;
7496                 tpacpi_inputdev->id.version = TPACPI_HKEY_INPUT_VERSION;
7497         }
7498         for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
7499                 ret = ibm_init(&ibms_init[i]);
7500                 if (ret >= 0 && *ibms_init[i].param)
7501                         ret = ibms_init[i].data->write(ibms_init[i].param);
7502                 if (ret < 0) {
7503                         thinkpad_acpi_module_exit();
7504                         return ret;
7505                 }
7506         }
7507         ret = input_register_device(tpacpi_inputdev);
7508         if (ret < 0) {
7509                 printk(TPACPI_ERR "unable to register input device\n");
7510                 thinkpad_acpi_module_exit();
7511                 return ret;
7512         } else {
7513                 tp_features.input_device_registered = 1;
7514         }
7515
7516         tpacpi_lifecycle = TPACPI_LIFE_RUNNING;
7517         return 0;
7518 }
7519
7520 /* Please remove this in year 2009 */
7521 MODULE_ALIAS("ibm_acpi");
7522
7523 MODULE_ALIAS(TPACPI_DRVR_SHORTNAME);
7524
7525 /*
7526  * DMI matching for module autoloading
7527  *
7528  * See http://thinkwiki.org/wiki/List_of_DMI_IDs
7529  * See http://thinkwiki.org/wiki/BIOS_Upgrade_Downloads
7530  *
7531  * Only models listed in thinkwiki will be supported, so add yours
7532  * if it is not there yet.
7533  */
7534 #define IBM_BIOS_MODULE_ALIAS(__type) \
7535         MODULE_ALIAS("dmi:bvnIBM:bvr" __type "ET??WW*")
7536
7537 /* Non-ancient thinkpads */
7538 MODULE_ALIAS("dmi:bvnIBM:*:svnIBM:*:pvrThinkPad*:rvnIBM:*");
7539 MODULE_ALIAS("dmi:bvnLENOVO:*:svnLENOVO:*:pvrThinkPad*:rvnLENOVO:*");
7540
7541 /* Ancient thinkpad BIOSes have to be identified by
7542  * BIOS type or model number, and there are far less
7543  * BIOS types than model numbers... */
7544 IBM_BIOS_MODULE_ALIAS("I[BDHIMNOTWVYZ]");
7545 IBM_BIOS_MODULE_ALIAS("1[0368A-GIKM-PST]");
7546 IBM_BIOS_MODULE_ALIAS("K[UX-Z]");
7547
7548 MODULE_AUTHOR("Borislav Deianov, Henrique de Moraes Holschuh");
7549 MODULE_DESCRIPTION(TPACPI_DESC);
7550 MODULE_VERSION(TPACPI_VERSION);
7551 MODULE_LICENSE("GPL");
7552
7553 module_init(thinkpad_acpi_module_init);
7554 module_exit(thinkpad_acpi_module_exit);