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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 "0.21"
  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 #include <acpi/acnamesp.h>
  80
  81 #include <linux/pci_ids.h>
  82
  83
  84 /* ThinkPad CMOS commands */
  85 #define TP_CMOS_VOLUME_DOWN     0
  86 #define TP_CMOS_VOLUME_UP       1
  87 #define TP_CMOS_VOLUME_MUTE     2
  88 #define TP_CMOS_BRIGHTNESS_UP   4
  89 #define TP_CMOS_BRIGHTNESS_DOWN 5
  90 #define TP_CMOS_THINKLIGHT_ON   12
  91 #define TP_CMOS_THINKLIGHT_OFF  13
  92
  93 /* NVRAM Addresses */
  94 enum tp_nvram_addr {
  95         TP_NVRAM_ADDR_HK2               = 0x57,
  96         TP_NVRAM_ADDR_THINKLIGHT        = 0x58,
  97         TP_NVRAM_ADDR_VIDEO             = 0x59,
  98         TP_NVRAM_ADDR_BRIGHTNESS        = 0x5e,
  99         TP_NVRAM_ADDR_MIXER             = 0x60,
 100 };
 101
 102 /* NVRAM bit masks */
 103 enum {
 104         TP_NVRAM_MASK_HKT_THINKPAD      = 0x08,
 105         TP_NVRAM_MASK_HKT_ZOOM          = 0x20,
 106         TP_NVRAM_MASK_HKT_DISPLAY       = 0x40,
 107         TP_NVRAM_MASK_HKT_HIBERNATE     = 0x80,
 108         TP_NVRAM_MASK_THINKLIGHT        = 0x10,
 109         TP_NVRAM_MASK_HKT_DISPEXPND     = 0x30,
 110         TP_NVRAM_MASK_HKT_BRIGHTNESS    = 0x20,
 111         TP_NVRAM_MASK_LEVEL_BRIGHTNESS  = 0x0f,
 112         TP_NVRAM_POS_LEVEL_BRIGHTNESS   = 0,
 113         TP_NVRAM_MASK_MUTE              = 0x40,
 114         TP_NVRAM_MASK_HKT_VOLUME        = 0x80,
 115         TP_NVRAM_MASK_LEVEL_VOLUME      = 0x0f,
 116         TP_NVRAM_POS_LEVEL_VOLUME       = 0,
 117 };
 118
 119 /* ACPI HIDs */
 120 #define TPACPI_ACPI_HKEY_HID            "IBM0068"
 121
 122 /* Input IDs */
 123 #define TPACPI_HKEY_INPUT_PRODUCT       0x5054 /* "TP" */
 124 #define TPACPI_HKEY_INPUT_VERSION       0x4101
 125
 126
 127 /****************************************************************************
 128  * Main driver
 129  */
 130
 131 #define TPACPI_NAME "thinkpad"
 132 #define TPACPI_DESC "ThinkPad ACPI Extras"
 133 #define TPACPI_FILE TPACPI_NAME "_acpi"
 134 #define TPACPI_URL "http://ibm-acpi.sf.net/"
 135 #define TPACPI_MAIL "ibm-acpi-devel@lists.sourceforge.net"
 136
 137 #define TPACPI_PROC_DIR "ibm"
 138 #define TPACPI_ACPI_EVENT_PREFIX "ibm"
 139 #define TPACPI_DRVR_NAME TPACPI_FILE
 140 #define TPACPI_DRVR_SHORTNAME "tpacpi"
 141 #define TPACPI_HWMON_DRVR_NAME TPACPI_NAME "_hwmon"
 142
 143 #define TPACPI_NVRAM_KTHREAD_NAME "ktpacpi_nvramd"
 144 #define TPACPI_WORKQUEUE_NAME "ktpacpid"
 145
 146 #define TPACPI_MAX_ACPI_ARGS 3
 147
 148 /* rfkill switches */
 149 enum {
 150         TPACPI_RFK_BLUETOOTH_SW_ID = 0,
 151         TPACPI_RFK_WWAN_SW_ID,
 152 };
 153
 154 /* Debugging */
 155 #define TPACPI_LOG TPACPI_FILE ": "
 156 #define TPACPI_ERR         KERN_ERR    TPACPI_LOG
 157 #define TPACPI_NOTICE KERN_NOTICE TPACPI_LOG
 158 #define TPACPI_INFO   KERN_INFO   TPACPI_LOG
 159 #define TPACPI_DEBUG  KERN_DEBUG  TPACPI_LOG
 160
 161 #define TPACPI_DBG_ALL          0xffff
 162 #define TPACPI_DBG_INIT         0x0001
 163 #define TPACPI_DBG_EXIT         0x0002
 164 #define dbg_printk(a_dbg_level, format, arg...) \
 165         do { if (dbg_level & a_dbg_level) \
 166                 printk(TPACPI_DEBUG "%s: " format, __func__ , ## arg); \
 167         } while (0)
 168 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
 169 #define vdbg_printk(a_dbg_level, format, arg...) \
 170         dbg_printk(a_dbg_level, format, ## arg)
 171 static const char *str_supported(int is_supported);
 172 #else
 173 #define vdbg_printk(a_dbg_level, format, arg...)
 174 #endif
 175
 176 #define onoff(status, bit) ((status) & (1 << (bit)) ? "on" : "off")
 177 #define enabled(status, bit) ((status) & (1 << (bit)) ? "enabled" : "disabled")
 178 #define strlencmp(a, b) (strncmp((a), (b), strlen(b)))
 179
 180
 181 /****************************************************************************
 182  * Driver-wide structs and misc. variables
 183  */
 184
 185 struct ibm_struct;
 186
 187 struct tp_acpi_drv_struct {
 188         const struct acpi_device_id *hid;
 189         struct acpi_driver *driver;
 190
 191         void (*notify) (struct ibm_struct *, u32);
 192         acpi_handle *handle;
 193         u32 type;
 194         struct acpi_device *device;
 195 };
 196
 197 struct ibm_struct {
 198         char *name;
 199
 200         int (*read) (char *);
 201         int (*write) (char *);
 202         void (*exit) (void);
 203         void (*resume) (void);
 204         void (*suspend) (pm_message_t state);
 205
 206         struct list_head all_drivers;
 207
 208         struct tp_acpi_drv_struct *acpi;
 209
 210         struct {
 211                 u8 acpi_driver_registered:1;
 212                 u8 acpi_notify_installed:1;
 213                 u8 proc_created:1;
 214                 u8 init_called:1;
 215                 u8 experimental:1;
 216         } flags;
 217 };
 218
 219 struct ibm_init_struct {
 220         char param[32];
 221
 222         int (*init) (struct ibm_init_struct *);
 223         struct ibm_struct *data;
 224 };
 225
 226 static struct {
 227 #ifdef CONFIG_THINKPAD_ACPI_BAY
 228         u32 bay_status:1;
 229         u32 bay_eject:1;
 230         u32 bay_status2:1;
 231         u32 bay_eject2:1;
 232 #endif
 233         u32 bluetooth:1;
 234         u32 hotkey:1;
 235         u32 hotkey_mask:1;
 236         u32 hotkey_wlsw:1;
 237         u32 hotkey_tablet:1;
 238         u32 light:1;
 239         u32 light_status:1;
 240         u32 bright_16levels:1;
 241         u32 bright_acpimode:1;
 242         u32 wan:1;
 243         u32 fan_ctrl_status_undef:1;
 244         u32 input_device_registered:1;
 245         u32 platform_drv_registered:1;
 246         u32 platform_drv_attrs_registered:1;
 247         u32 sensors_pdrv_registered:1;
 248         u32 sensors_pdrv_attrs_registered:1;
 249         u32 sensors_pdev_attrs_registered:1;
 250         u32 hotkey_poll_active:1;
 251 } tp_features;
 252
 253 static struct {
 254         u16 hotkey_mask_ff:1;
 255         u16 bright_cmos_ec_unsync:1;
 256 } tp_warned;
 257
 258 struct thinkpad_id_data {
 259         unsigned int vendor;    /* ThinkPad vendor:
 260                                  * PCI_VENDOR_ID_IBM/PCI_VENDOR_ID_LENOVO */
 261
 262         char *bios_version_str; /* Something like 1ZET51WW (1.03z) */
 263         char *ec_version_str;   /* Something like 1ZHT51WW-1.04a */
 264
 265         u16 bios_model;         /* Big Endian, TP-1Y = 0x5931, 0 = unknown */
 266         u16 ec_model;
 267
 268         char *model_str;        /* ThinkPad T43 */
 269         char *nummodel_str;     /* 9384A9C for a 9384-A9C model */
 270 };
 271 static struct thinkpad_id_data thinkpad_id;
 272
 273 static enum {
 274         TPACPI_LIFE_INIT = 0,
 275         TPACPI_LIFE_RUNNING,
 276         TPACPI_LIFE_EXITING,
 277 } tpacpi_lifecycle;
 278
 279 static int experimental;
 280 static u32 dbg_level;
 281
 282 static struct workqueue_struct *tpacpi_wq;
 283
 284 /* Special LED class that can defer work */
 285 struct tpacpi_led_classdev {
 286         struct led_classdev led_classdev;
 287         struct work_struct work;
 288         enum led_brightness new_brightness;
 289         unsigned int led;
 290 };
 291
 292 /****************************************************************************
 293  ****************************************************************************
 294  *
 295  * ACPI Helpers and device model
 296  *
 297  ****************************************************************************
 298  ****************************************************************************/
 299
 300 /*************************************************************************
 301  * ACPI basic handles
 302  */
 303
 304 static acpi_handle root_handle;
 305
 306 #define TPACPI_HANDLE(object, parent, paths...)                 \
 307         static acpi_handle  object##_handle;                    \
 308         static acpi_handle *object##_parent = &parent##_handle; \
 309         static char        *object##_path;                      \
 310         static char        *object##_paths[] = { paths }
 311
 312 TPACPI_HANDLE(ec, root, "\\_SB.PCI0.ISA.EC0",   /* 240, 240x */
 313            "\\_SB.PCI.ISA.EC",  /* 570 */
 314            "\\_SB.PCI0.ISA0.EC0",       /* 600e/x, 770e, 770x */
 315            "\\_SB.PCI0.ISA.EC", /* A21e, A2xm/p, T20-22, X20-21 */
 316            "\\_SB.PCI0.AD4S.EC0",       /* i1400, R30 */
 317            "\\_SB.PCI0.ICH3.EC0",       /* R31 */
 318            "\\_SB.PCI0.LPC.EC", /* all others */
 319            );
 320
 321 TPACPI_HANDLE(ecrd, ec, "ECRD");        /* 570 */
 322 TPACPI_HANDLE(ecwr, ec, "ECWR");        /* 570 */
 323
 324 TPACPI_HANDLE(cmos, root, "\\UCMS",     /* R50, R50e, R50p, R51, */
 325                                         /* T4x, X31, X40 */
 326            "\\CMOS",            /* A3x, G4x, R32, T23, T30, X22-24, X30 */
 327            "\\CMS",             /* R40, R40e */
 328            );                   /* all others */
 329
 330 TPACPI_HANDLE(hkey, ec, "\\_SB.HKEY",   /* 600e/x, 770e, 770x */
 331            "^HKEY",             /* R30, R31 */
 332            "HKEY",              /* all others */
 333            );                   /* 570 */
 334
 335 TPACPI_HANDLE(vid, root, "\\_SB.PCI.AGP.VGA",   /* 570 */
 336            "\\_SB.PCI0.AGP0.VID0",      /* 600e/x, 770x */
 337            "\\_SB.PCI0.VID0",   /* 770e */
 338            "\\_SB.PCI0.VID",    /* A21e, G4x, R50e, X30, X40 */
 339            "\\_SB.PCI0.AGP.VID",        /* all others */
 340            );                           /* R30, R31 */
 341
 342
 343 /*************************************************************************
 344  * ACPI helpers
 345  */
 346
 347 static int acpi_evalf(acpi_handle handle,
 348                       void *res, char *method, char *fmt, ...)
 349 {
 350         char *fmt0 = fmt;
 351         struct acpi_object_list params;
 352         union acpi_object in_objs[TPACPI_MAX_ACPI_ARGS];
 353         struct acpi_buffer result, *resultp;
 354         union acpi_object out_obj;
 355         acpi_status status;
 356         va_list ap;
 357         char res_type;
 358         int success;
 359         int quiet;
 360
 361         if (!*fmt) {
 362                 printk(TPACPI_ERR "acpi_evalf() called with empty format\n");
 363                 return 0;
 364         }
 365
 366         if (*fmt == 'q') {
 367                 quiet = 1;
 368                 fmt++;
 369         } else
 370                 quiet = 0;
 371
 372         res_type = *(fmt++);
 373
 374         params.count = 0;
 375         params.pointer = &in_objs[0];
 376
 377         va_start(ap, fmt);
 378         while (*fmt) {
 379                 char c = *(fmt++);
 380                 switch (c) {
 381                 case 'd':       /* int */
 382                         in_objs[params.count].integer.value = va_arg(ap, int);
 383                         in_objs[params.count++].type = ACPI_TYPE_INTEGER;
 384                         break;
 385                         /* add more types as needed */
 386                 default:
 387                         printk(TPACPI_ERR "acpi_evalf() called "
 388                                "with invalid format character '%c'\n", c);
 389                         return 0;
 390                 }
 391         }
 392         va_end(ap);
 393
 394         if (res_type != 'v') {
 395                 result.length = sizeof(out_obj);
 396                 result.pointer = &out_obj;
 397                 resultp = &result;
 398         } else
 399                 resultp = NULL;
 400
 401         status = acpi_evaluate_object(handle, method, &params, resultp);
 402
 403         switch (res_type) {
 404         case 'd':               /* int */
 405                 if (res)
 406                         *(int *)res = out_obj.integer.value;
 407                 success = status == AE_OK && out_obj.type == ACPI_TYPE_INTEGER;
 408                 break;
 409         case 'v':               /* void */
 410                 success = status == AE_OK;
 411                 break;
 412                 /* add more types as needed */
 413         default:
 414                 printk(TPACPI_ERR "acpi_evalf() called "
 415                        "with invalid format character '%c'\n", res_type);
 416                 return 0;
 417         }
 418
 419         if (!success && !quiet)
 420                 printk(TPACPI_ERR "acpi_evalf(%s, %s, ...) failed: %d\n",
 421                        method, fmt0, status);
 422
 423         return success;
 424 }
 425
 426 static int acpi_ec_read(int i, u8 *p)
 427 {
 428         int v;
 429
 430         if (ecrd_handle) {
 431                 if (!acpi_evalf(ecrd_handle, &v, NULL, "dd", i))
 432                         return 0;
 433                 *p = v;
 434         } else {
 435                 if (ec_read(i, p) < 0)
 436                         return 0;
 437         }
 438
 439         return 1;
 440 }
 441
 442 static int acpi_ec_write(int i, u8 v)
 443 {
 444         if (ecwr_handle) {
 445                 if (!acpi_evalf(ecwr_handle, NULL, NULL, "vdd", i, v))
 446                         return 0;
 447         } else {
 448                 if (ec_write(i, v) < 0)
 449                         return 0;
 450         }
 451
 452         return 1;
 453 }
 454
 455 #if defined(CONFIG_THINKPAD_ACPI_DOCK) || defined(CONFIG_THINKPAD_ACPI_BAY)
 456 static int _sta(acpi_handle handle)
 457 {
 458         int status;
 459
 460         if (!handle || !acpi_evalf(handle, &status, "_STA", "d"))
 461                 status = 0;
 462
 463         return status;
 464 }
 465 #endif
 466
 467 static int issue_thinkpad_cmos_command(int cmos_cmd)
 468 {
 469         if (!cmos_handle)
 470                 return -ENXIO;
 471
 472         if (!acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd))
 473                 return -EIO;
 474
 475         return 0;
 476 }
 477
 478 /*************************************************************************
 479  * ACPI device model
 480  */
 481
 482 #define TPACPI_ACPIHANDLE_INIT(object) \
 483         drv_acpi_handle_init(#object, &object##_handle, *object##_parent, \
 484                 object##_paths, ARRAY_SIZE(object##_paths), &object##_path)
 485
 486 static void drv_acpi_handle_init(char *name,
 487                            acpi_handle *handle, acpi_handle parent,
 488                            char **paths, int num_paths, char **path)
 489 {
 490         int i;
 491         acpi_status status;
 492
 493         vdbg_printk(TPACPI_DBG_INIT, "trying to locate ACPI handle for %s\n",
 494                 name);
 495
 496         for (i = 0; i < num_paths; i++) {
 497                 status = acpi_get_handle(parent, paths[i], handle);
 498                 if (ACPI_SUCCESS(status)) {
 499                         *path = paths[i];
 500                         dbg_printk(TPACPI_DBG_INIT,
 501                                    "Found ACPI handle %s for %s\n",
 502                                    *path, name);
 503                         return;
 504                 }
 505         }
 506
 507         vdbg_printk(TPACPI_DBG_INIT, "ACPI handle for %s not found\n",
 508                     name);
 509         *handle = NULL;
 510 }
 511
 512 static void dispatch_acpi_notify(acpi_handle handle, u32 event, void *data)
 513 {
 514         struct ibm_struct *ibm = data;
 515
 516         if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
 517                 return;
 518
 519         if (!ibm || !ibm->acpi || !ibm->acpi->notify)
 520                 return;
 521
 522         ibm->acpi->notify(ibm, event);
 523 }
 524
 525 static int __init setup_acpi_notify(struct ibm_struct *ibm)
 526 {
 527         acpi_status status;
 528         int rc;
 529
 530         BUG_ON(!ibm->acpi);
 531
 532         if (!*ibm->acpi->handle)
 533                 return 0;
 534
 535         vdbg_printk(TPACPI_DBG_INIT,
 536                 "setting up ACPI notify for %s\n", ibm->name);
 537
 538         rc = acpi_bus_get_device(*ibm->acpi->handle, &ibm->acpi->device);
 539         if (rc < 0) {
 540                 printk(TPACPI_ERR "acpi_bus_get_device(%s) failed: %d\n",
 541                         ibm->name, rc);
 542                 return -ENODEV;
 543         }
 544
 545         ibm->acpi->device->driver_data = ibm;
 546         sprintf(acpi_device_class(ibm->acpi->device), "%s/%s",
 547                 TPACPI_ACPI_EVENT_PREFIX,
 548                 ibm->name);
 549
 550         status = acpi_install_notify_handler(*ibm->acpi->handle,
 551                         ibm->acpi->type, dispatch_acpi_notify, ibm);
 552         if (ACPI_FAILURE(status)) {
 553                 if (status == AE_ALREADY_EXISTS) {
 554                         printk(TPACPI_NOTICE
 555                                "another device driver is already "
 556                                "handling %s events\n", ibm->name);
 557                 } else {
 558                         printk(TPACPI_ERR
 559                                "acpi_install_notify_handler(%s) failed: %d\n",
 560                                ibm->name, status);
 561                 }
 562                 return -ENODEV;
 563         }
 564         ibm->flags.acpi_notify_installed = 1;
 565         return 0;
 566 }
 567
 568 static int __init tpacpi_device_add(struct acpi_device *device)
 569 {
 570         return 0;
 571 }
 572
 573 static int __init register_tpacpi_subdriver(struct ibm_struct *ibm)
 574 {
 575         int rc;
 576
 577         dbg_printk(TPACPI_DBG_INIT,
 578                 "registering %s as an ACPI driver\n", ibm->name);
 579
 580         BUG_ON(!ibm->acpi);
 581
 582         ibm->acpi->driver = kzalloc(sizeof(struct acpi_driver), GFP_KERNEL);
 583         if (!ibm->acpi->driver) {
 584                 printk(TPACPI_ERR
 585                        "failed to allocate memory for ibm->acpi->driver\n");
 586                 return -ENOMEM;
 587         }
 588
 589         sprintf(ibm->acpi->driver->name, "%s_%s", TPACPI_NAME, ibm->name);
 590         ibm->acpi->driver->ids = ibm->acpi->hid;
 591
 592         ibm->acpi->driver->ops.add = &tpacpi_device_add;
 593
 594         rc = acpi_bus_register_driver(ibm->acpi->driver);
 595         if (rc < 0) {
 596                 printk(TPACPI_ERR "acpi_bus_register_driver(%s) failed: %d\n",
 597                        ibm->name, rc);
 598                 kfree(ibm->acpi->driver);
 599                 ibm->acpi->driver = NULL;
 600         } else if (!rc)
 601                 ibm->flags.acpi_driver_registered = 1;
 602
 603         return rc;
 604 }
 605
 606
 607 /****************************************************************************
 608  ****************************************************************************
 609  *
 610  * Procfs Helpers
 611  *
 612  ****************************************************************************
 613  ****************************************************************************/
 614
 615 static int dispatch_procfs_read(char *page, char **start, off_t off,
 616                         int count, int *eof, void *data)
 617 {
 618         struct ibm_struct *ibm = data;
 619         int len;
 620
 621         if (!ibm || !ibm->read)
 622                 return -EINVAL;
 623
 624         len = ibm->read(page);
 625         if (len < 0)
 626                 return len;
 627
 628         if (len <= off + count)
 629                 *eof = 1;
 630         *start = page + off;
 631         len -= off;
 632         if (len > count)
 633                 len = count;
 634         if (len < 0)
 635                 len = 0;
 636
 637         return len;
 638 }
 639
 640 static int dispatch_procfs_write(struct file *file,
 641                         const char __user *userbuf,
 642                         unsigned long count, void *data)
 643 {
 644         struct ibm_struct *ibm = data;
 645         char *kernbuf;
 646         int ret;
 647
 648         if (!ibm || !ibm->write)
 649                 return -EINVAL;
 650
 651         kernbuf = kmalloc(count + 2, GFP_KERNEL);
 652         if (!kernbuf)
 653                 return -ENOMEM;
 654
 655         if (copy_from_user(kernbuf, userbuf, count)) {
 656                 kfree(kernbuf);
 657                 return -EFAULT;
 658         }
 659
 660         kernbuf[count] = 0;
 661         strcat(kernbuf, ",");
 662         ret = ibm->write(kernbuf);
 663         if (ret == 0)
 664                 ret = count;
 665
 666         kfree(kernbuf);
 667
 668         return ret;
 669 }
 670
 671 static char *next_cmd(char **cmds)
 672 {
 673         char *start = *cmds;
 674         char *end;
 675
 676         while ((end = strchr(start, ',')) && end == start)
 677                 start = end + 1;
 678
 679         if (!end)
 680                 return NULL;
 681
 682         *end = 0;
 683         *cmds = end + 1;
 684         return start;
 685 }
 686
 687
 688 /****************************************************************************
 689  ****************************************************************************
 690  *
 691  * Device model: input, hwmon and platform
 692  *
 693  ****************************************************************************
 694  ****************************************************************************/
 695
 696 static struct platform_device *tpacpi_pdev;
 697 static struct platform_device *tpacpi_sensors_pdev;
 698 static struct device *tpacpi_hwmon;
 699 static struct input_dev *tpacpi_inputdev;
 700 static struct mutex tpacpi_inputdev_send_mutex;
 701 static LIST_HEAD(tpacpi_all_drivers);
 702
 703 static int tpacpi_suspend_handler(struct platform_device *pdev,
 704                                   pm_message_t state)
 705 {
 706         struct ibm_struct *ibm, *itmp;
 707
 708         list_for_each_entry_safe(ibm, itmp,
 709                                  &tpacpi_all_drivers,
 710                                  all_drivers) {
 711                 if (ibm->suspend)
 712                         (ibm->suspend)(state);
 713         }
 714
 715         return 0;
 716 }
 717
 718 static int tpacpi_resume_handler(struct platform_device *pdev)
 719 {
 720         struct ibm_struct *ibm, *itmp;
 721
 722         list_for_each_entry_safe(ibm, itmp,
 723                                  &tpacpi_all_drivers,
 724                                  all_drivers) {
 725                 if (ibm->resume)
 726                         (ibm->resume)();
 727         }
 728
 729         return 0;
 730 }
 731
 732 static struct platform_driver tpacpi_pdriver = {
 733         .driver = {
 734                 .name = TPACPI_DRVR_NAME,
 735                 .owner = THIS_MODULE,
 736         },
 737         .suspend = tpacpi_suspend_handler,
 738         .resume = tpacpi_resume_handler,
 739 };
 740
 741 static struct platform_driver tpacpi_hwmon_pdriver = {
 742         .driver = {
 743                 .name = TPACPI_HWMON_DRVR_NAME,
 744                 .owner = THIS_MODULE,
 745         },
 746 };
 747
 748 /*************************************************************************
 749  * sysfs support helpers
 750  */
 751
 752 struct attribute_set {
 753         unsigned int members, max_members;
 754         struct attribute_group group;
 755 };
 756
 757 struct attribute_set_obj {
 758         struct attribute_set s;
 759         struct attribute *a;
 760 } __attribute__((packed));
 761
 762 static struct attribute_set *create_attr_set(unsigned int max_members,
 763                                                 const char *name)
 764 {
 765         struct attribute_set_obj *sobj;
 766
 767         if (max_members == 0)
 768                 return NULL;
 769
 770         /* Allocates space for implicit NULL at the end too */
 771         sobj = kzalloc(sizeof(struct attribute_set_obj) +
 772                     max_members * sizeof(struct attribute *),
 773                     GFP_KERNEL);
 774         if (!sobj)
 775                 return NULL;
 776         sobj->s.max_members = max_members;
 777         sobj->s.group.attrs = &sobj->a;
 778         sobj->s.group.name = name;
 779
 780         return &sobj->s;
 781 }
 782
 783 #define destroy_attr_set(_set) \
 784         kfree(_set);
 785
 786 /* not multi-threaded safe, use it in a single thread per set */
 787 static int add_to_attr_set(struct attribute_set *s, struct attribute *attr)
 788 {
 789         if (!s || !attr)
 790                 return -EINVAL;
 791
 792         if (s->members >= s->max_members)
 793                 return -ENOMEM;
 794
 795         s->group.attrs[s->members] = attr;
 796         s->members++;
 797
 798         return 0;
 799 }
 800
 801 static int add_many_to_attr_set(struct attribute_set *s,
 802                         struct attribute **attr,
 803                         unsigned int count)
 804 {
 805         int i, res;
 806
 807         for (i = 0; i < count; i++) {
 808                 res = add_to_attr_set(s, attr[i]);
 809                 if (res)
 810                         return res;
 811         }
 812
 813         return 0;
 814 }
 815
 816 static void delete_attr_set(struct attribute_set *s, struct kobject *kobj)
 817 {
 818         sysfs_remove_group(kobj, &s->group);
 819         destroy_attr_set(s);
 820 }
 821
 822 #define register_attr_set_with_sysfs(_attr_set, _kobj) \
 823         sysfs_create_group(_kobj, &_attr_set->group)
 824
 825 static int parse_strtoul(const char *buf,
 826                 unsigned long max, unsigned long *value)
 827 {
 828         char *endp;
 829
 830         while (*buf && isspace(*buf))
 831                 buf++;
 832         *value = simple_strtoul(buf, &endp, 0);
 833         while (*endp && isspace(*endp))
 834                 endp++;
 835         if (*endp || *value > max)
 836                 return -EINVAL;
 837
 838         return 0;
 839 }
 840
 841 static void tpacpi_disable_brightness_delay(void)
 842 {
 843         if (acpi_evalf(hkey_handle, NULL, "PWMS", "qvd", 0))
 844                 printk(TPACPI_NOTICE
 845                         "ACPI backlight control delay disabled\n");
 846 }
 847
 848 static int __init tpacpi_query_bcl_levels(acpi_handle handle)
 849 {
 850         struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
 851         union acpi_object *obj;
 852         int rc;
 853
 854         if (ACPI_SUCCESS(acpi_evaluate_object(handle, NULL, NULL, &buffer))) {
 855                 obj = (union acpi_object *)buffer.pointer;
 856                 if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) {
 857                         printk(TPACPI_ERR "Unknown _BCL data, "
 858                                "please report this to %s\n", TPACPI_MAIL);
 859                         rc = 0;
 860                 } else {
 861                         rc = obj->package.count;
 862                 }
 863         } else {
 864                 return 0;
 865         }
 866
 867         kfree(buffer.pointer);
 868         return rc;
 869 }
 870
 871 static acpi_status __init tpacpi_acpi_walk_find_bcl(acpi_handle handle,
 872                                         u32 lvl, void *context, void **rv)
 873 {
 874         char name[ACPI_PATH_SEGMENT_LENGTH];
 875         struct acpi_buffer buffer = { sizeof(name), &name };
 876
 877         if (ACPI_SUCCESS(acpi_get_name(handle, ACPI_SINGLE_NAME, &buffer)) &&
 878             !strncmp("_BCL", name, sizeof(name) - 1)) {
 879                 BUG_ON(!rv || !*rv);
 880                 **(int **)rv = tpacpi_query_bcl_levels(handle);
 881                 return AE_CTRL_TERMINATE;
 882         } else {
 883                 return AE_OK;
 884         }
 885 }
 886
 887 /*
 888  * Returns 0 (no ACPI _BCL or _BCL invalid), or size of brightness map
 889  */
 890 static int __init tpacpi_check_std_acpi_brightness_support(void)
 891 {
 892         int status;
 893         int bcl_levels = 0;
 894         void *bcl_ptr = &bcl_levels;
 895
 896         if (!vid_handle) {
 897                 TPACPI_ACPIHANDLE_INIT(vid);
 898         }
 899         if (!vid_handle)
 900                 return 0;
 901
 902         /*
 903          * Search for a _BCL method, and execute it.  This is safe on all
 904          * ThinkPads, and as a side-effect, _BCL will place a Lenovo Vista
 905          * BIOS in ACPI backlight control mode.  We do NOT have to care
 906          * about calling the _BCL method in an enabled video device, any
 907          * will do for our purposes.
 908          */
 909
 910         status = acpi_walk_namespace(ACPI_TYPE_METHOD, vid_handle, 3,
 911                                      tpacpi_acpi_walk_find_bcl, NULL,
 912                                      &bcl_ptr);
 913
 914         if (ACPI_SUCCESS(status) && bcl_levels > 2) {
 915                 tp_features.bright_acpimode = 1;
 916                 return (bcl_levels - 2);
 917         }
 918
 919         return 0;
 920 }
 921
 922 static int __init tpacpi_new_rfkill(const unsigned int id,
 923                         struct rfkill **rfk,
 924                         const enum rfkill_type rfktype,
 925                         const char *name,
 926                         int (*toggle_radio)(void *, enum rfkill_state),
 927                         int (*get_state)(void *, enum rfkill_state *))
 928 {
 929         int res;
 930         enum rfkill_state initial_state;
 931
 932         *rfk = rfkill_allocate(&tpacpi_pdev->dev, rfktype);
 933         if (!*rfk) {
 934                 printk(TPACPI_ERR
 935                         "failed to allocate memory for rfkill class\n");
 936                 return -ENOMEM;
 937         }
 938
 939         (*rfk)->name = name;
 940         (*rfk)->get_state = get_state;
 941         (*rfk)->toggle_radio = toggle_radio;
 942
 943         if (!get_state(NULL, &initial_state))
 944                 (*rfk)->state = initial_state;
 945
 946         res = rfkill_register(*rfk);
 947         if (res < 0) {
 948                 printk(TPACPI_ERR
 949                         "failed to register %s rfkill switch: %d\n",
 950                         name, res);
 951                 rfkill_free(*rfk);
 952                 *rfk = NULL;
 953                 return res;
 954         }
 955
 956         return 0;
 957 }
 958
 959 /*************************************************************************
 960  * thinkpad-acpi driver attributes
 961  */
 962
 963 /* interface_version --------------------------------------------------- */
 964 static ssize_t tpacpi_driver_interface_version_show(
 965                                 struct device_driver *drv,
 966                                 char *buf)
 967 {
 968         return snprintf(buf, PAGE_SIZE, "0x%08x\n", TPACPI_SYSFS_VERSION);
 969 }
 970
 971 static DRIVER_ATTR(interface_version, S_IRUGO,
 972                 tpacpi_driver_interface_version_show, NULL);
 973
 974 /* debug_level --------------------------------------------------------- */
 975 static ssize_t tpacpi_driver_debug_show(struct device_driver *drv,
 976                                                 char *buf)
 977 {
 978         return snprintf(buf, PAGE_SIZE, "0x%04x\n", dbg_level);
 979 }
 980
 981 static ssize_t tpacpi_driver_debug_store(struct device_driver *drv,
 982                                                 const char *buf, size_t count)
 983 {
 984         unsigned long t;
 985
 986         if (parse_strtoul(buf, 0xffff, &t))
 987                 return -EINVAL;
 988
 989         dbg_level = t;
 990
 991         return count;
 992 }
 993
 994 static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO,
 995                 tpacpi_driver_debug_show, tpacpi_driver_debug_store);
 996
 997 /* version ------------------------------------------------------------- */
 998 static ssize_t tpacpi_driver_version_show(struct device_driver *drv,
 999                                                 char *buf)
1000 {
1001         return snprintf(buf, PAGE_SIZE, "%s v%s\n",
1002                         TPACPI_DESC, TPACPI_VERSION);
1003 }
1004
1005 static DRIVER_ATTR(version, S_IRUGO,
1006                 tpacpi_driver_version_show, NULL);
1007
1008 /* --------------------------------------------------------------------- */
1009
1010 static struct driver_attribute *tpacpi_driver_attributes[] = {
1011         &driver_attr_debug_level, &driver_attr_version,
1012         &driver_attr_interface_version,
1013 };
1014
1015 static int __init tpacpi_create_driver_attributes(struct device_driver *drv)
1016 {
1017         int i, res;
1018
1019         i = 0;
1020         res = 0;
1021         while (!res && i < ARRAY_SIZE(tpacpi_driver_attributes)) {
1022                 res = driver_create_file(drv, tpacpi_driver_attributes[i]);
1023                 i++;
1024         }
1025
1026         return res;
1027 }
1028
1029 static void tpacpi_remove_driver_attributes(struct device_driver *drv)
1030 {
1031         int i;
1032
1033         for (i = 0; i < ARRAY_SIZE(tpacpi_driver_attributes); i++)
1034                 driver_remove_file(drv, tpacpi_driver_attributes[i]);
1035 }
1036
1037 /****************************************************************************
1038  ****************************************************************************
1039  *
1040  * Subdrivers
1041  *
1042  ****************************************************************************
1043  ****************************************************************************/
1044
1045 /*************************************************************************
1046  * thinkpad-acpi init subdriver
1047  */
1048
1049 static int __init thinkpad_acpi_driver_init(struct ibm_init_struct *iibm)
1050 {
1051         printk(TPACPI_INFO "%s v%s\n", TPACPI_DESC, TPACPI_VERSION);
1052         printk(TPACPI_INFO "%s\n", TPACPI_URL);
1053
1054         printk(TPACPI_INFO "ThinkPad BIOS %s, EC %s\n",
1055                 (thinkpad_id.bios_version_str) ?
1056                         thinkpad_id.bios_version_str : "unknown",
1057                 (thinkpad_id.ec_version_str) ?
1058                         thinkpad_id.ec_version_str : "unknown");
1059
1060         if (thinkpad_id.vendor && thinkpad_id.model_str)
1061                 printk(TPACPI_INFO "%s %s, model %s\n",
1062                         (thinkpad_id.vendor == PCI_VENDOR_ID_IBM) ?
1063                                 "IBM" : ((thinkpad_id.vendor ==
1064                                                 PCI_VENDOR_ID_LENOVO) ?
1065                                         "Lenovo" : "Unknown vendor"),
1066                         thinkpad_id.model_str,
1067                         (thinkpad_id.nummodel_str) ?
1068                                 thinkpad_id.nummodel_str : "unknown");
1069
1070         return 0;
1071 }
1072
1073 static int thinkpad_acpi_driver_read(char *p)
1074 {
1075         int len = 0;
1076
1077         len += sprintf(p + len, "driver:\t\t%s\n", TPACPI_DESC);
1078         len += sprintf(p + len, "version:\t%s\n", TPACPI_VERSION);
1079
1080         return len;
1081 }
1082
1083 static struct ibm_struct thinkpad_acpi_driver_data = {
1084         .name = "driver",
1085         .read = thinkpad_acpi_driver_read,
1086 };
1087
1088 /*************************************************************************
1089  * Hotkey subdriver
1090  */
1091
1092 enum {  /* hot key scan codes (derived from ACPI DSDT) */
1093         TP_ACPI_HOTKEYSCAN_FNF1         = 0,
1094         TP_ACPI_HOTKEYSCAN_FNF2,
1095         TP_ACPI_HOTKEYSCAN_FNF3,
1096         TP_ACPI_HOTKEYSCAN_FNF4,
1097         TP_ACPI_HOTKEYSCAN_FNF5,
1098         TP_ACPI_HOTKEYSCAN_FNF6,
1099         TP_ACPI_HOTKEYSCAN_FNF7,
1100         TP_ACPI_HOTKEYSCAN_FNF8,
1101         TP_ACPI_HOTKEYSCAN_FNF9,
1102         TP_ACPI_HOTKEYSCAN_FNF10,
1103         TP_ACPI_HOTKEYSCAN_FNF11,
1104         TP_ACPI_HOTKEYSCAN_FNF12,
1105         TP_ACPI_HOTKEYSCAN_FNBACKSPACE,
1106         TP_ACPI_HOTKEYSCAN_FNINSERT,
1107         TP_ACPI_HOTKEYSCAN_FNDELETE,
1108         TP_ACPI_HOTKEYSCAN_FNHOME,
1109         TP_ACPI_HOTKEYSCAN_FNEND,
1110         TP_ACPI_HOTKEYSCAN_FNPAGEUP,
1111         TP_ACPI_HOTKEYSCAN_FNPAGEDOWN,
1112         TP_ACPI_HOTKEYSCAN_FNSPACE,
1113         TP_ACPI_HOTKEYSCAN_VOLUMEUP,
1114         TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
1115         TP_ACPI_HOTKEYSCAN_MUTE,
1116         TP_ACPI_HOTKEYSCAN_THINKPAD,
1117 };
1118
1119 enum {  /* Keys available through NVRAM polling */
1120         TPACPI_HKEY_NVRAM_KNOWN_MASK = 0x00fb88c0U,
1121         TPACPI_HKEY_NVRAM_GOOD_MASK  = 0x00fb8000U,
1122 };
1123
1124 enum {  /* Positions of some of the keys in hotkey masks */
1125         TP_ACPI_HKEY_DISPSWTCH_MASK     = 1 << TP_ACPI_HOTKEYSCAN_FNF7,
1126         TP_ACPI_HKEY_DISPXPAND_MASK     = 1 << TP_ACPI_HOTKEYSCAN_FNF8,
1127         TP_ACPI_HKEY_HIBERNATE_MASK     = 1 << TP_ACPI_HOTKEYSCAN_FNF12,
1128         TP_ACPI_HKEY_BRGHTUP_MASK       = 1 << TP_ACPI_HOTKEYSCAN_FNHOME,
1129         TP_ACPI_HKEY_BRGHTDWN_MASK      = 1 << TP_ACPI_HOTKEYSCAN_FNEND,
1130         TP_ACPI_HKEY_THNKLGHT_MASK      = 1 << TP_ACPI_HOTKEYSCAN_FNPAGEUP,
1131         TP_ACPI_HKEY_ZOOM_MASK          = 1 << TP_ACPI_HOTKEYSCAN_FNSPACE,
1132         TP_ACPI_HKEY_VOLUP_MASK         = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEUP,
1133         TP_ACPI_HKEY_VOLDWN_MASK        = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
1134         TP_ACPI_HKEY_MUTE_MASK          = 1 << TP_ACPI_HOTKEYSCAN_MUTE,
1135         TP_ACPI_HKEY_THINKPAD_MASK      = 1 << TP_ACPI_HOTKEYSCAN_THINKPAD,
1136 };
1137
1138 enum {  /* NVRAM to ACPI HKEY group map */
1139         TP_NVRAM_HKEY_GROUP_HK2         = TP_ACPI_HKEY_THINKPAD_MASK |
1140                                           TP_ACPI_HKEY_ZOOM_MASK |
1141                                           TP_ACPI_HKEY_DISPSWTCH_MASK |
1142                                           TP_ACPI_HKEY_HIBERNATE_MASK,
1143         TP_NVRAM_HKEY_GROUP_BRIGHTNESS  = TP_ACPI_HKEY_BRGHTUP_MASK |
1144                                           TP_ACPI_HKEY_BRGHTDWN_MASK,
1145         TP_NVRAM_HKEY_GROUP_VOLUME      = TP_ACPI_HKEY_VOLUP_MASK |
1146                                           TP_ACPI_HKEY_VOLDWN_MASK |
1147                                           TP_ACPI_HKEY_MUTE_MASK,
1148 };
1149
1150 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1151 struct tp_nvram_state {
1152        u16 thinkpad_toggle:1;
1153        u16 zoom_toggle:1;
1154        u16 display_toggle:1;
1155        u16 thinklight_toggle:1;
1156        u16 hibernate_toggle:1;
1157        u16 displayexp_toggle:1;
1158        u16 display_state:1;
1159        u16 brightness_toggle:1;
1160        u16 volume_toggle:1;
1161        u16 mute:1;
1162
1163        u8 brightness_level;
1164        u8 volume_level;
1165 };
1166
1167 static struct task_struct *tpacpi_hotkey_task;
1168 static u32 hotkey_source_mask;          /* bit mask 0=ACPI,1=NVRAM */
1169 static int hotkey_poll_freq = 10;       /* Hz */
1170 static struct mutex hotkey_thread_mutex;
1171 static struct mutex hotkey_thread_data_mutex;
1172 static unsigned int hotkey_config_change;
1173
1174 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1175
1176 #define hotkey_source_mask 0U
1177
1178 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1179
1180 static struct mutex hotkey_mutex;
1181
1182 static enum {   /* Reasons for waking up */
1183         TP_ACPI_WAKEUP_NONE = 0,        /* None or unknown */
1184         TP_ACPI_WAKEUP_BAYEJ,           /* Bay ejection request */
1185         TP_ACPI_WAKEUP_UNDOCK,          /* Undock request */
1186 } hotkey_wakeup_reason;
1187
1188 static int hotkey_autosleep_ack;
1189
1190 static int hotkey_orig_status;
1191 static u32 hotkey_orig_mask;
1192 static u32 hotkey_all_mask;
1193 static u32 hotkey_reserved_mask;
1194 static u32 hotkey_mask;
1195
1196 static unsigned int hotkey_report_mode;
1197
1198 static u16 *hotkey_keycode_map;
1199
1200 static struct attribute_set *hotkey_dev_attributes;
1201
1202 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1203 #define HOTKEY_CONFIG_CRITICAL_START \
1204         do { \
1205                 mutex_lock(&hotkey_thread_data_mutex); \
1206                 hotkey_config_change++; \
1207         } while (0);
1208 #define HOTKEY_CONFIG_CRITICAL_END \
1209         mutex_unlock(&hotkey_thread_data_mutex);
1210 #else
1211 #define HOTKEY_CONFIG_CRITICAL_START
1212 #define HOTKEY_CONFIG_CRITICAL_END
1213 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1214
1215 /* HKEY.MHKG() return bits */
1216 #define TP_HOTKEY_TABLET_MASK (1 << 3)
1217
1218 static int hotkey_get_wlsw(int *status)
1219 {
1220         if (!acpi_evalf(hkey_handle, status, "WLSW", "d"))
1221                 return -EIO;
1222         return 0;
1223 }
1224
1225 static int hotkey_get_tablet_mode(int *status)
1226 {
1227         int s;
1228
1229         if (!acpi_evalf(hkey_handle, &s, "MHKG", "d"))
1230                 return -EIO;
1231
1232         *status = ((s & TP_HOTKEY_TABLET_MASK) != 0);
1233         return 0;
1234 }
1235
1236 /*
1237  * Call with hotkey_mutex held
1238  */
1239 static int hotkey_mask_get(void)
1240 {
1241         u32 m = 0;
1242
1243         if (tp_features.hotkey_mask) {
1244                 if (!acpi_evalf(hkey_handle, &m, "DHKN", "d"))
1245                         return -EIO;
1246         }
1247         hotkey_mask = m | (hotkey_source_mask & hotkey_mask);
1248
1249         return 0;
1250 }
1251
1252 /*
1253  * Call with hotkey_mutex held
1254  */
1255 static int hotkey_mask_set(u32 mask)
1256 {
1257         int i;
1258         int rc = 0;
1259
1260         if (tp_features.hotkey_mask) {
1261                 if (!tp_warned.hotkey_mask_ff &&
1262                     (mask == 0xffff || mask == 0xffffff ||
1263                      mask == 0xffffffff)) {
1264                         tp_warned.hotkey_mask_ff = 1;
1265                         printk(TPACPI_NOTICE
1266                                "setting the hotkey mask to 0x%08x is likely "
1267                                "not the best way to go about it\n", mask);
1268                         printk(TPACPI_NOTICE
1269                                "please consider using the driver defaults, "
1270                                "and refer to up-to-date thinkpad-acpi "
1271                                "documentation\n");
1272                 }
1273
1274                 HOTKEY_CONFIG_CRITICAL_START
1275                 for (i = 0; i < 32; i++) {
1276                         u32 m = 1 << i;
1277                         /* enable in firmware mask only keys not in NVRAM
1278                          * mode, but enable the key in the cached hotkey_mask
1279                          * regardless of mode, or the key will end up
1280                          * disabled by hotkey_mask_get() */
1281                         if (!acpi_evalf(hkey_handle,
1282                                         NULL, "MHKM", "vdd", i + 1,
1283                                         !!((mask & ~hotkey_source_mask) & m))) {
1284                                 rc = -EIO;
1285                                 break;
1286                         } else {
1287                                 hotkey_mask = (hotkey_mask & ~m) | (mask & m);
1288                         }
1289                 }
1290                 HOTKEY_CONFIG_CRITICAL_END
1291
1292                 /* hotkey_mask_get must be called unconditionally below */
1293                 if (!hotkey_mask_get() && !rc &&
1294                     (hotkey_mask & ~hotkey_source_mask) !=
1295                      (mask & ~hotkey_source_mask)) {
1296                         printk(TPACPI_NOTICE
1297                                "requested hot key mask 0x%08x, but "
1298                                "firmware forced it to 0x%08x\n",
1299                                mask, hotkey_mask);
1300                 }
1301         } else {
1302 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1303                 HOTKEY_CONFIG_CRITICAL_START
1304                 hotkey_mask = mask & hotkey_source_mask;
1305                 HOTKEY_CONFIG_CRITICAL_END
1306                 hotkey_mask_get();
1307                 if (hotkey_mask != mask) {
1308                         printk(TPACPI_NOTICE
1309                                "requested hot key mask 0x%08x, "
1310                                "forced to 0x%08x (NVRAM poll mask is "
1311                                "0x%08x): no firmware mask support\n",
1312                                mask, hotkey_mask, hotkey_source_mask);
1313                 }
1314 #else
1315                 hotkey_mask_get();
1316                 rc = -ENXIO;
1317 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1318         }
1319
1320         return rc;
1321 }
1322
1323 static int hotkey_status_get(int *status)
1324 {
1325         if (!acpi_evalf(hkey_handle, status, "DHKC", "d"))
1326                 return -EIO;
1327
1328         return 0;
1329 }
1330
1331 static int hotkey_status_set(int status)
1332 {
1333         if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", status))
1334                 return -EIO;
1335
1336         return 0;
1337 }
1338
1339 static void tpacpi_input_send_tabletsw(void)
1340 {
1341         int state;
1342
1343         if (tp_features.hotkey_tablet &&
1344             !hotkey_get_tablet_mode(&state)) {
1345                 mutex_lock(&tpacpi_inputdev_send_mutex);
1346
1347                 input_report_switch(tpacpi_inputdev,
1348                                     SW_TABLET_MODE, !!state);
1349                 input_sync(tpacpi_inputdev);
1350
1351                 mutex_unlock(&tpacpi_inputdev_send_mutex);
1352         }
1353 }
1354
1355 static void tpacpi_input_send_key(unsigned int scancode)
1356 {
1357         unsigned int keycode;
1358
1359         keycode = hotkey_keycode_map[scancode];
1360
1361         if (keycode != KEY_RESERVED) {
1362                 mutex_lock(&tpacpi_inputdev_send_mutex);
1363
1364                 input_report_key(tpacpi_inputdev, keycode, 1);
1365                 if (keycode == KEY_UNKNOWN)
1366                         input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN,
1367                                     scancode);
1368                 input_sync(tpacpi_inputdev);
1369
1370                 input_report_key(tpacpi_inputdev, keycode, 0);
1371                 if (keycode == KEY_UNKNOWN)
1372                         input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN,
1373                                     scancode);
1374                 input_sync(tpacpi_inputdev);
1375
1376                 mutex_unlock(&tpacpi_inputdev_send_mutex);
1377         }
1378 }
1379
1380 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1381 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver;
1382
1383 static void tpacpi_hotkey_send_key(unsigned int scancode)
1384 {
1385         tpacpi_input_send_key(scancode);
1386         if (hotkey_report_mode < 2) {
1387                 acpi_bus_generate_proc_event(ibm_hotkey_acpidriver.device,
1388                                                 0x80, 0x1001 + scancode);
1389         }
1390 }
1391
1392 static void hotkey_read_nvram(struct tp_nvram_state *n, u32 m)
1393 {
1394         u8 d;
1395
1396         if (m & TP_NVRAM_HKEY_GROUP_HK2) {
1397                 d = nvram_read_byte(TP_NVRAM_ADDR_HK2);
1398                 n->thinkpad_toggle = !!(d & TP_NVRAM_MASK_HKT_THINKPAD);
1399                 n->zoom_toggle = !!(d & TP_NVRAM_MASK_HKT_ZOOM);
1400                 n->display_toggle = !!(d & TP_NVRAM_MASK_HKT_DISPLAY);
1401                 n->hibernate_toggle = !!(d & TP_NVRAM_MASK_HKT_HIBERNATE);
1402         }
1403         if (m & TP_ACPI_HKEY_THNKLGHT_MASK) {
1404                 d = nvram_read_byte(TP_NVRAM_ADDR_THINKLIGHT);
1405                 n->thinklight_toggle = !!(d & TP_NVRAM_MASK_THINKLIGHT);
1406         }
1407         if (m & TP_ACPI_HKEY_DISPXPAND_MASK) {
1408                 d = nvram_read_byte(TP_NVRAM_ADDR_VIDEO);
1409                 n->displayexp_toggle =
1410                                 !!(d & TP_NVRAM_MASK_HKT_DISPEXPND);
1411         }
1412         if (m & TP_NVRAM_HKEY_GROUP_BRIGHTNESS) {
1413                 d = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS);
1414                 n->brightness_level = (d & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
1415                                 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
1416                 n->brightness_toggle =
1417                                 !!(d & TP_NVRAM_MASK_HKT_BRIGHTNESS);
1418         }
1419         if (m & TP_NVRAM_HKEY_GROUP_VOLUME) {
1420                 d = nvram_read_byte(TP_NVRAM_ADDR_MIXER);
1421                 n->volume_level = (d & TP_NVRAM_MASK_LEVEL_VOLUME)
1422                                 >> TP_NVRAM_POS_LEVEL_VOLUME;
1423                 n->mute = !!(d & TP_NVRAM_MASK_MUTE);
1424                 n->volume_toggle = !!(d & TP_NVRAM_MASK_HKT_VOLUME);
1425         }
1426 }
1427
1428 #define TPACPI_COMPARE_KEY(__scancode, __member) \
1429         do { \
1430                 if ((mask & (1 << __scancode)) && \
1431                     oldn->__member != newn->__member) \
1432                 tpacpi_hotkey_send_key(__scancode); \
1433         } while (0)
1434
1435 #define TPACPI_MAY_SEND_KEY(__scancode) \
1436         do { if (mask & (1 << __scancode)) \
1437                 tpacpi_hotkey_send_key(__scancode); } while (0)
1438
1439 static void hotkey_compare_and_issue_event(struct tp_nvram_state *oldn,
1440                                            struct tp_nvram_state *newn,
1441                                            u32 mask)
1442 {
1443         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_THINKPAD, thinkpad_toggle);
1444         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNSPACE, zoom_toggle);
1445         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF7, display_toggle);
1446         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF12, hibernate_toggle);
1447
1448         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNPAGEUP, thinklight_toggle);
1449
1450         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF8, displayexp_toggle);
1451
1452         /* handle volume */
1453         if (oldn->volume_toggle != newn->volume_toggle) {
1454                 if (oldn->mute != newn->mute) {
1455                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE);
1456                 }
1457                 if (oldn->volume_level > newn->volume_level) {
1458                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
1459                 } else if (oldn->volume_level < newn->volume_level) {
1460                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
1461                 } else if (oldn->mute == newn->mute) {
1462                         /* repeated key presses that didn't change state */
1463                         if (newn->mute) {
1464                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE);
1465                         } else if (newn->volume_level != 0) {
1466                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
1467                         } else {
1468                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
1469                         }
1470                 }
1471         }
1472
1473         /* handle brightness */
1474         if (oldn->brightness_toggle != newn->brightness_toggle) {
1475                 if (oldn->brightness_level < newn->brightness_level) {
1476                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
1477                 } else if (oldn->brightness_level > newn->brightness_level) {
1478                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
1479                 } else {
1480                         /* repeated key presses that didn't change state */
1481                         if (newn->brightness_level != 0) {
1482                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
1483                         } else {
1484                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
1485                         }
1486                 }
1487         }
1488 }
1489
1490 #undef TPACPI_COMPARE_KEY
1491 #undef TPACPI_MAY_SEND_KEY
1492
1493 static int hotkey_kthread(void *data)
1494 {
1495         struct tp_nvram_state s[2];
1496         u32 mask;
1497         unsigned int si, so;
1498         unsigned long t;
1499         unsigned int change_detector, must_reset;
1500
1501         mutex_lock(&hotkey_thread_mutex);
1502
1503         if (tpacpi_lifecycle == TPACPI_LIFE_EXITING)
1504                 goto exit;
1505
1506         set_freezable();
1507
1508         so = 0;
1509         si = 1;
1510         t = 0;
1511
1512         /* Initial state for compares */
1513         mutex_lock(&hotkey_thread_data_mutex);
1514         change_detector = hotkey_config_change;
1515         mask = hotkey_source_mask & hotkey_mask;
1516         mutex_unlock(&hotkey_thread_data_mutex);
1517         hotkey_read_nvram(&s[so], mask);
1518
1519         while (!kthread_should_stop() && hotkey_poll_freq) {
1520                 if (t == 0)
1521                         t = 1000/hotkey_poll_freq;
1522                 t = msleep_interruptible(t);
1523                 if (unlikely(kthread_should_stop()))
1524                         break;
1525                 must_reset = try_to_freeze();
1526                 if (t > 0 && !must_reset)
1527                         continue;
1528
1529                 mutex_lock(&hotkey_thread_data_mutex);
1530                 if (must_reset || hotkey_config_change != change_detector) {
1531                         /* forget old state on thaw or config change */
1532                         si = so;
1533                         t = 0;
1534                         change_detector = hotkey_config_change;
1535                 }
1536                 mask = hotkey_source_mask & hotkey_mask;
1537                 mutex_unlock(&hotkey_thread_data_mutex);
1538
1539                 if (likely(mask)) {
1540                         hotkey_read_nvram(&s[si], mask);
1541                         if (likely(si != so)) {
1542                                 hotkey_compare_and_issue_event(&s[so], &s[si],
1543                                                                 mask);
1544                         }
1545                 }
1546
1547                 so = si;
1548                 si ^= 1;
1549         }
1550
1551 exit:
1552         mutex_unlock(&hotkey_thread_mutex);
1553         return 0;
1554 }
1555
1556 static void hotkey_poll_stop_sync(void)
1557 {
1558         if (tpacpi_hotkey_task) {
1559                 if (frozen(tpacpi_hotkey_task) ||
1560                     freezing(tpacpi_hotkey_task))
1561                         thaw_process(tpacpi_hotkey_task);
1562
1563                 kthread_stop(tpacpi_hotkey_task);
1564                 tpacpi_hotkey_task = NULL;
1565                 mutex_lock(&hotkey_thread_mutex);
1566                 /* at this point, the thread did exit */
1567                 mutex_unlock(&hotkey_thread_mutex);
1568         }
1569 }
1570
1571 /* call with hotkey_mutex held */
1572 static void hotkey_poll_setup(int may_warn)
1573 {
1574         if ((hotkey_source_mask & hotkey_mask) != 0 &&
1575             hotkey_poll_freq > 0 &&
1576             (tpacpi_inputdev->users > 0 || hotkey_report_mode < 2)) {
1577                 if (!tpacpi_hotkey_task) {
1578                         tpacpi_hotkey_task = kthread_run(hotkey_kthread,
1579                                         NULL, TPACPI_NVRAM_KTHREAD_NAME);
1580                         if (IS_ERR(tpacpi_hotkey_task)) {
1581                                 tpacpi_hotkey_task = NULL;
1582                                 printk(TPACPI_ERR
1583                                        "could not create kernel thread "
1584                                        "for hotkey polling\n");
1585                         }
1586                 }
1587         } else {
1588                 hotkey_poll_stop_sync();
1589                 if (may_warn &&
1590                     hotkey_source_mask != 0 && hotkey_poll_freq == 0) {
1591                         printk(TPACPI_NOTICE
1592                                 "hot keys 0x%08x require polling, "
1593                                 "which is currently disabled\n",
1594                                 hotkey_source_mask);
1595                 }
1596         }
1597 }
1598
1599 static void hotkey_poll_setup_safe(int may_warn)
1600 {
1601         mutex_lock(&hotkey_mutex);
1602         hotkey_poll_setup(may_warn);
1603         mutex_unlock(&hotkey_mutex);
1604 }
1605
1606 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1607
1608 static void hotkey_poll_setup_safe(int __unused)
1609 {
1610 }
1611
1612 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1613
1614 static int hotkey_inputdev_open(struct input_dev *dev)
1615 {
1616         switch (tpacpi_lifecycle) {
1617         case TPACPI_LIFE_INIT:
1618                 /*
1619                  * hotkey_init will call hotkey_poll_setup_safe
1620                  * at the appropriate moment
1621                  */
1622                 return 0;
1623         case TPACPI_LIFE_EXITING:
1624                 return -EBUSY;
1625         case TPACPI_LIFE_RUNNING:
1626                 hotkey_poll_setup_safe(0);
1627                 return 0;
1628         }
1629
1630         /* Should only happen if tpacpi_lifecycle is corrupt */
1631         BUG();
1632         return -EBUSY;
1633 }
1634
1635 static void hotkey_inputdev_close(struct input_dev *dev)
1636 {
1637         /* disable hotkey polling when possible */
1638         if (tpacpi_lifecycle == TPACPI_LIFE_RUNNING)
1639                 hotkey_poll_setup_safe(0);
1640 }
1641
1642 /* sysfs hotkey enable ------------------------------------------------- */
1643 static ssize_t hotkey_enable_show(struct device *dev,
1644                            struct device_attribute *attr,
1645                            char *buf)
1646 {
1647         int res, status;
1648
1649         res = hotkey_status_get(&status);
1650         if (res)
1651                 return res;
1652
1653         return snprintf(buf, PAGE_SIZE, "%d\n", status);
1654 }
1655
1656 static ssize_t hotkey_enable_store(struct device *dev,
1657                             struct device_attribute *attr,
1658                             const char *buf, size_t count)
1659 {
1660         unsigned long t;
1661         int res;
1662
1663         if (parse_strtoul(buf, 1, &t))
1664                 return -EINVAL;
1665
1666         res = hotkey_status_set(t);
1667
1668         return (res) ? res : count;
1669 }
1670
1671 static struct device_attribute dev_attr_hotkey_enable =
1672         __ATTR(hotkey_enable, S_IWUSR | S_IRUGO,
1673                 hotkey_enable_show, hotkey_enable_store);
1674
1675 /* sysfs hotkey mask --------------------------------------------------- */
1676 static ssize_t hotkey_mask_show(struct device *dev,
1677                            struct device_attribute *attr,
1678                            char *buf)
1679 {
1680         int res;
1681
1682         if (mutex_lock_interruptible(&hotkey_mutex))
1683                 return -ERESTARTSYS;
1684         res = hotkey_mask_get();
1685         mutex_unlock(&hotkey_mutex);
1686
1687         return (res)?
1688                 res : snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_mask);
1689 }
1690
1691 static ssize_t hotkey_mask_store(struct device *dev,
1692                             struct device_attribute *attr,
1693                             const char *buf, size_t count)
1694 {
1695         unsigned long t;
1696         int res;
1697
1698         if (parse_strtoul(buf, 0xffffffffUL, &t))
1699                 return -EINVAL;
1700
1701         if (mutex_lock_interruptible(&hotkey_mutex))
1702                 return -ERESTARTSYS;
1703
1704         res = hotkey_mask_set(t);
1705
1706 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1707         hotkey_poll_setup(1);
1708 #endif
1709
1710         mutex_unlock(&hotkey_mutex);
1711
1712         return (res) ? res : count;
1713 }
1714
1715 static struct device_attribute dev_attr_hotkey_mask =
1716         __ATTR(hotkey_mask, S_IWUSR | S_IRUGO,
1717                 hotkey_mask_show, hotkey_mask_store);
1718
1719 /* sysfs hotkey bios_enabled ------------------------------------------- */
1720 static ssize_t hotkey_bios_enabled_show(struct device *dev,
1721                            struct device_attribute *attr,
1722                            char *buf)
1723 {
1724         return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_orig_status);
1725 }
1726
1727 static struct device_attribute dev_attr_hotkey_bios_enabled =
1728         __ATTR(hotkey_bios_enabled, S_IRUGO, hotkey_bios_enabled_show, NULL);
1729
1730 /* sysfs hotkey bios_mask ---------------------------------------------- */
1731 static ssize_t hotkey_bios_mask_show(struct device *dev,
1732                            struct device_attribute *attr,
1733                            char *buf)
1734 {
1735         return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_orig_mask);
1736 }
1737
1738 static struct device_attribute dev_attr_hotkey_bios_mask =
1739         __ATTR(hotkey_bios_mask, S_IRUGO, hotkey_bios_mask_show, NULL);
1740
1741 /* sysfs hotkey all_mask ----------------------------------------------- */
1742 static ssize_t hotkey_all_mask_show(struct device *dev,
1743                            struct device_attribute *attr,
1744                            char *buf)
1745 {
1746         return snprintf(buf, PAGE_SIZE, "0x%08x\n",
1747                                 hotkey_all_mask | hotkey_source_mask);
1748 }
1749
1750 static struct device_attribute dev_attr_hotkey_all_mask =
1751         __ATTR(hotkey_all_mask, S_IRUGO, hotkey_all_mask_show, NULL);
1752
1753 /* sysfs hotkey recommended_mask --------------------------------------- */
1754 static ssize_t hotkey_recommended_mask_show(struct device *dev,
1755                                             struct device_attribute *attr,
1756                                             char *buf)
1757 {
1758         return snprintf(buf, PAGE_SIZE, "0x%08x\n",
1759                         (hotkey_all_mask | hotkey_source_mask)
1760                         & ~hotkey_reserved_mask);
1761 }
1762
1763 static struct device_attribute dev_attr_hotkey_recommended_mask =
1764         __ATTR(hotkey_recommended_mask, S_IRUGO,
1765                 hotkey_recommended_mask_show, NULL);
1766
1767 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1768
1769 /* sysfs hotkey hotkey_source_mask ------------------------------------- */
1770 static ssize_t hotkey_source_mask_show(struct device *dev,
1771                            struct device_attribute *attr,
1772                            char *buf)
1773 {
1774         return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_source_mask);
1775 }
1776
1777 static ssize_t hotkey_source_mask_store(struct device *dev,
1778                             struct device_attribute *attr,
1779                             const char *buf, size_t count)
1780 {
1781         unsigned long t;
1782
1783         if (parse_strtoul(buf, 0xffffffffUL, &t) ||
1784                 ((t & ~TPACPI_HKEY_NVRAM_KNOWN_MASK) != 0))
1785                 return -EINVAL;
1786
1787         if (mutex_lock_interruptible(&hotkey_mutex))
1788                 return -ERESTARTSYS;
1789
1790         HOTKEY_CONFIG_CRITICAL_START
1791         hotkey_source_mask = t;
1792         HOTKEY_CONFIG_CRITICAL_END
1793
1794         hotkey_poll_setup(1);
1795
1796         mutex_unlock(&hotkey_mutex);
1797
1798         return count;
1799 }
1800
1801 static struct device_attribute dev_attr_hotkey_source_mask =
1802         __ATTR(hotkey_source_mask, S_IWUSR | S_IRUGO,
1803                 hotkey_source_mask_show, hotkey_source_mask_store);
1804
1805 /* sysfs hotkey hotkey_poll_freq --------------------------------------- */
1806 static ssize_t hotkey_poll_freq_show(struct device *dev,
1807                            struct device_attribute *attr,
1808                            char *buf)
1809 {
1810         return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_poll_freq);
1811 }
1812
1813 static ssize_t hotkey_poll_freq_store(struct device *dev,
1814                             struct device_attribute *attr,
1815                             const char *buf, size_t count)
1816 {
1817         unsigned long t;
1818
1819         if (parse_strtoul(buf, 25, &t))
1820                 return -EINVAL;
1821
1822         if (mutex_lock_interruptible(&hotkey_mutex))
1823                 return -ERESTARTSYS;
1824
1825         hotkey_poll_freq = t;
1826
1827         hotkey_poll_setup(1);
1828         mutex_unlock(&hotkey_mutex);
1829
1830         return count;
1831 }
1832
1833 static struct device_attribute dev_attr_hotkey_poll_freq =
1834         __ATTR(hotkey_poll_freq, S_IWUSR | S_IRUGO,
1835                 hotkey_poll_freq_show, hotkey_poll_freq_store);
1836
1837 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1838
1839 /* sysfs hotkey radio_sw (pollable) ------------------------------------ */
1840 static ssize_t hotkey_radio_sw_show(struct device *dev,
1841                            struct device_attribute *attr,
1842                            char *buf)
1843 {
1844         int res, s;
1845         res = hotkey_get_wlsw(&s);
1846         if (res < 0)
1847                 return res;
1848
1849         return snprintf(buf, PAGE_SIZE, "%d\n", !!s);
1850 }
1851
1852 static struct device_attribute dev_attr_hotkey_radio_sw =
1853         __ATTR(hotkey_radio_sw, S_IRUGO, hotkey_radio_sw_show, NULL);
1854
1855 static void hotkey_radio_sw_notify_change(void)
1856 {
1857         if (tp_features.hotkey_wlsw)
1858                 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
1859                              "hotkey_radio_sw");
1860 }
1861
1862 /* sysfs hotkey tablet mode (pollable) --------------------------------- */
1863 static ssize_t hotkey_tablet_mode_show(struct device *dev,
1864                            struct device_attribute *attr,
1865                            char *buf)
1866 {
1867         int res, s;
1868         res = hotkey_get_tablet_mode(&s);
1869         if (res < 0)
1870                 return res;
1871
1872         return snprintf(buf, PAGE_SIZE, "%d\n", !!s);
1873 }
1874
1875 static struct device_attribute dev_attr_hotkey_tablet_mode =
1876         __ATTR(hotkey_tablet_mode, S_IRUGO, hotkey_tablet_mode_show, NULL);
1877
1878 static void hotkey_tablet_mode_notify_change(void)
1879 {
1880         if (tp_features.hotkey_tablet)
1881                 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
1882                              "hotkey_tablet_mode");
1883 }
1884
1885 /* sysfs hotkey report_mode -------------------------------------------- */
1886 static ssize_t hotkey_report_mode_show(struct device *dev,
1887                            struct device_attribute *attr,
1888                            char *buf)
1889 {
1890         return snprintf(buf, PAGE_SIZE, "%d\n",
1891                 (hotkey_report_mode != 0) ? hotkey_report_mode : 1);
1892 }
1893
1894 static struct device_attribute dev_attr_hotkey_report_mode =
1895         __ATTR(hotkey_report_mode, S_IRUGO, hotkey_report_mode_show, NULL);
1896
1897 /* sysfs wakeup reason (pollable) -------------------------------------- */
1898 static ssize_t hotkey_wakeup_reason_show(struct device *dev,
1899                            struct device_attribute *attr,
1900                            char *buf)
1901 {
1902         return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_wakeup_reason);
1903 }
1904
1905 static struct device_attribute dev_attr_hotkey_wakeup_reason =
1906         __ATTR(wakeup_reason, S_IRUGO, hotkey_wakeup_reason_show, NULL);
1907
1908 static void hotkey_wakeup_reason_notify_change(void)
1909 {
1910         if (tp_features.hotkey_mask)
1911                 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
1912                              "wakeup_reason");
1913 }
1914
1915 /* sysfs wakeup hotunplug_complete (pollable) -------------------------- */
1916 static ssize_t hotkey_wakeup_hotunplug_complete_show(struct device *dev,
1917                            struct device_attribute *attr,
1918                            char *buf)
1919 {
1920         return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_autosleep_ack);
1921 }
1922
1923 static struct device_attribute dev_attr_hotkey_wakeup_hotunplug_complete =
1924         __ATTR(wakeup_hotunplug_complete, S_IRUGO,
1925                hotkey_wakeup_hotunplug_complete_show, NULL);
1926
1927 static void hotkey_wakeup_hotunplug_complete_notify_change(void)
1928 {
1929         if (tp_features.hotkey_mask)
1930                 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
1931                              "wakeup_hotunplug_complete");
1932 }
1933
1934 /* --------------------------------------------------------------------- */
1935
1936 static struct attribute *hotkey_attributes[] __initdata = {
1937         &dev_attr_hotkey_enable.attr,
1938         &dev_attr_hotkey_bios_enabled.attr,
1939         &dev_attr_hotkey_report_mode.attr,
1940 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1941         &dev_attr_hotkey_mask.attr,
1942         &dev_attr_hotkey_all_mask.attr,
1943         &dev_attr_hotkey_recommended_mask.attr,
1944         &dev_attr_hotkey_source_mask.attr,
1945         &dev_attr_hotkey_poll_freq.attr,
1946 #endif
1947 };
1948
1949 static struct attribute *hotkey_mask_attributes[] __initdata = {
1950         &dev_attr_hotkey_bios_mask.attr,
1951 #ifndef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1952         &dev_attr_hotkey_mask.attr,
1953         &dev_attr_hotkey_all_mask.attr,
1954         &dev_attr_hotkey_recommended_mask.attr,
1955 #endif
1956         &dev_attr_hotkey_wakeup_reason.attr,
1957         &dev_attr_hotkey_wakeup_hotunplug_complete.attr,
1958 };
1959
1960 static void bluetooth_update_rfk(void);
1961 static void wan_update_rfk(void);
1962 static void tpacpi_send_radiosw_update(void)
1963 {
1964         int wlsw;
1965
1966         /* Sync these BEFORE sending any rfkill events */
1967         if (tp_features.bluetooth)
1968                 bluetooth_update_rfk();
1969         if (tp_features.wan)
1970                 wan_update_rfk();
1971
1972         if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&wlsw)) {
1973                 mutex_lock(&tpacpi_inputdev_send_mutex);
1974
1975                 input_report_switch(tpacpi_inputdev,
1976                                     SW_RFKILL_ALL, !!wlsw);
1977                 input_sync(tpacpi_inputdev);
1978
1979                 mutex_unlock(&tpacpi_inputdev_send_mutex);
1980         }
1981         hotkey_radio_sw_notify_change();
1982 }
1983
1984 static void hotkey_exit(void)
1985 {
1986 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1987         hotkey_poll_stop_sync();
1988 #endif
1989
1990         if (hotkey_dev_attributes)
1991                 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
1992
1993         kfree(hotkey_keycode_map);
1994
1995         if (tp_features.hotkey) {
1996                 dbg_printk(TPACPI_DBG_EXIT,
1997                            "restoring original hot key mask\n");
1998                 /* no short-circuit boolean operator below! */
1999                 if ((hotkey_mask_set(hotkey_orig_mask) |
2000                      hotkey_status_set(hotkey_orig_status)) != 0)
2001                         printk(TPACPI_ERR
2002                                "failed to restore hot key mask "
2003                                "to BIOS defaults\n");
2004         }
2005 }
2006
2007 static int __init hotkey_init(struct ibm_init_struct *iibm)
2008 {
2009         /* Requirements for changing the default keymaps:
2010          *
2011          * 1. Many of the keys are mapped to KEY_RESERVED for very
2012          *    good reasons.  Do not change them unless you have deep
2013          *    knowledge on the IBM and Lenovo ThinkPad firmware for
2014          *    the various ThinkPad models.  The driver behaves
2015          *    differently for KEY_RESERVED: such keys have their
2016          *    hot key mask *unset* in mask_recommended, and also
2017          *    in the initial hot key mask programmed into the
2018          *    firmware at driver load time, which means the firm-
2019          *    ware may react very differently if you change them to
2020          *    something else;
2021          *
2022          * 2. You must be subscribed to the linux-thinkpad and
2023          *    ibm-acpi-devel mailing lists, and you should read the
2024          *    list archives since 2007 if you want to change the
2025          *    keymaps.  This requirement exists so that you will
2026          *    know the past history of problems with the thinkpad-
2027          *    acpi driver keymaps, and also that you will be
2028          *    listening to any bug reports;
2029          *
2030          * 3. Do not send thinkpad-acpi specific patches directly to
2031          *    for merging, *ever*.  Send them to the linux-acpi
2032          *    mailinglist for comments.  Merging is to be done only
2033          *    through acpi-test and the ACPI maintainer.
2034          *
2035          * If the above is too much to ask, don't change the keymap.
2036          * Ask the thinkpad-acpi maintainer to do it, instead.
2037          */
2038         static u16 ibm_keycode_map[] __initdata = {
2039                 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
2040                 KEY_FN_F1,      KEY_FN_F2,      KEY_COFFEE,     KEY_SLEEP,
2041                 KEY_WLAN,       KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
2042                 KEY_FN_F9,      KEY_FN_F10,     KEY_FN_F11,     KEY_SUSPEND,
2043
2044                 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
2045                 KEY_UNKNOWN,    /* 0x0C: FN+BACKSPACE */
2046                 KEY_UNKNOWN,    /* 0x0D: FN+INSERT */
2047                 KEY_UNKNOWN,    /* 0x0E: FN+DELETE */
2048
2049                 /* brightness: firmware always reacts to them, unless
2050                  * X.org did some tricks in the radeon BIOS scratch
2051                  * registers of *some* models */
2052                 KEY_RESERVED,   /* 0x0F: FN+HOME (brightness up) */
2053                 KEY_RESERVED,   /* 0x10: FN+END (brightness down) */
2054
2055                 /* Thinklight: firmware always react to it */
2056                 KEY_RESERVED,   /* 0x11: FN+PGUP (thinklight toggle) */
2057
2058                 KEY_UNKNOWN,    /* 0x12: FN+PGDOWN */
2059                 KEY_ZOOM,       /* 0x13: FN+SPACE (zoom) */
2060
2061                 /* Volume: firmware always react to it and reprograms
2062                  * the built-in *extra* mixer.  Never map it to control
2063                  * another mixer by default. */
2064                 KEY_RESERVED,   /* 0x14: VOLUME UP */
2065                 KEY_RESERVED,   /* 0x15: VOLUME DOWN */
2066                 KEY_RESERVED,   /* 0x16: MUTE */
2067
2068                 KEY_VENDOR,     /* 0x17: Thinkpad/AccessIBM/Lenovo */
2069
2070                 /* (assignments unknown, please report if found) */
2071                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2072                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2073         };
2074         static u16 lenovo_keycode_map[] __initdata = {
2075                 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
2076                 KEY_FN_F1,      KEY_COFFEE,     KEY_BATTERY,    KEY_SLEEP,
2077                 KEY_WLAN,       KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
2078                 KEY_FN_F9,      KEY_FN_F10,     KEY_FN_F11,     KEY_SUSPEND,
2079
2080                 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
2081                 KEY_UNKNOWN,    /* 0x0C: FN+BACKSPACE */
2082                 KEY_UNKNOWN,    /* 0x0D: FN+INSERT */
2083                 KEY_UNKNOWN,    /* 0x0E: FN+DELETE */
2084
2085                 /* These either have to go through ACPI video, or
2086                  * act like in the IBM ThinkPads, so don't ever
2087                  * enable them by default */
2088                 KEY_RESERVED,   /* 0x0F: FN+HOME (brightness up) */
2089                 KEY_RESERVED,   /* 0x10: FN+END (brightness down) */
2090
2091                 KEY_RESERVED,   /* 0x11: FN+PGUP (thinklight toggle) */
2092
2093                 KEY_UNKNOWN,    /* 0x12: FN+PGDOWN */
2094                 KEY_ZOOM,       /* 0x13: FN+SPACE (zoom) */
2095
2096                 /* Volume: z60/z61, T60 (BIOS version?): firmware always
2097                  * react to it and reprograms the built-in *extra* mixer.
2098                  * Never map it to control another mixer by default.
2099                  *
2100                  * T60?, T61, R60?, R61: firmware and EC tries to send
2101                  * these over the regular keyboard, so these are no-ops,
2102                  * but there are still weird bugs re. MUTE, so do not
2103                  * change unless you get test reports from all Lenovo
2104                  * models.  May cause the BIOS to interfere with the
2105                  * HDA mixer.
2106                  */
2107                 KEY_RESERVED,   /* 0x14: VOLUME UP */
2108                 KEY_RESERVED,   /* 0x15: VOLUME DOWN */
2109                 KEY_RESERVED,   /* 0x16: MUTE */
2110
2111                 KEY_VENDOR,     /* 0x17: Thinkpad/AccessIBM/Lenovo */
2112
2113                 /* (assignments unknown, please report if found) */
2114                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2115                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2116         };
2117
2118 #define TPACPI_HOTKEY_MAP_LEN           ARRAY_SIZE(ibm_keycode_map)
2119 #define TPACPI_HOTKEY_MAP_SIZE          sizeof(ibm_keycode_map)
2120 #define TPACPI_HOTKEY_MAP_TYPESIZE      sizeof(ibm_keycode_map[0])
2121
2122         int res, i;
2123         int status;
2124         int hkeyv;
2125
2126         vdbg_printk(TPACPI_DBG_INIT, "initializing hotkey subdriver\n");
2127
2128         BUG_ON(!tpacpi_inputdev);
2129         BUG_ON(tpacpi_inputdev->open != NULL ||
2130                tpacpi_inputdev->close != NULL);
2131
2132         TPACPI_ACPIHANDLE_INIT(hkey);
2133         mutex_init(&hotkey_mutex);
2134
2135 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2136         mutex_init(&hotkey_thread_mutex);
2137         mutex_init(&hotkey_thread_data_mutex);
2138 #endif
2139
2140         /* hotkey not supported on 570 */
2141         tp_features.hotkey = hkey_handle != NULL;
2142
2143         vdbg_printk(TPACPI_DBG_INIT, "hotkeys are %s\n",
2144                 str_supported(tp_features.hotkey));
2145
2146         if (!tp_features.hotkey)
2147                 return 1;
2148
2149         tpacpi_disable_brightness_delay();
2150
2151         hotkey_dev_attributes = create_attr_set(13, NULL);
2152         if (!hotkey_dev_attributes)
2153                 return -ENOMEM;
2154         res = add_many_to_attr_set(hotkey_dev_attributes,
2155                         hotkey_attributes,
2156                         ARRAY_SIZE(hotkey_attributes));
2157         if (res)
2158                 goto err_exit;
2159
2160         /* mask not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
2161            A30, R30, R31, T20-22, X20-21, X22-24.  Detected by checking
2162            for HKEY interface version 0x100 */
2163         if (acpi_evalf(hkey_handle, &hkeyv, "MHKV", "qd")) {
2164                 if ((hkeyv >> 8) != 1) {
2165                         printk(TPACPI_ERR "unknown version of the "
2166                                "HKEY interface: 0x%x\n", hkeyv);
2167                         printk(TPACPI_ERR "please report this to %s\n",
2168                                TPACPI_MAIL);
2169                 } else {
2170                         /*
2171                          * MHKV 0x100 in A31, R40, R40e,
2172                          * T4x, X31, and later
2173                          */
2174                         tp_features.hotkey_mask = 1;
2175                 }
2176         }
2177
2178         vdbg_printk(TPACPI_DBG_INIT, "hotkey masks are %s\n",
2179                 str_supported(tp_features.hotkey_mask));
2180
2181         if (tp_features.hotkey_mask) {
2182                 if (!acpi_evalf(hkey_handle, &hotkey_all_mask,
2183                                 "MHKA", "qd")) {
2184                         printk(TPACPI_ERR
2185                                "missing MHKA handler, "
2186                                "please report this to %s\n",
2187                                TPACPI_MAIL);
2188                         /* FN+F12, FN+F4, FN+F3 */
2189                         hotkey_all_mask = 0x080cU;
2190                 }
2191         }
2192
2193         /* hotkey_source_mask *must* be zero for
2194          * the first hotkey_mask_get */
2195         res = hotkey_status_get(&hotkey_orig_status);
2196         if (res)
2197                 goto err_exit;
2198
2199         if (tp_features.hotkey_mask) {
2200                 res = hotkey_mask_get();
2201                 if (res)
2202                         goto err_exit;
2203
2204                 hotkey_orig_mask = hotkey_mask;
2205                 res = add_many_to_attr_set(
2206                                 hotkey_dev_attributes,
2207                                 hotkey_mask_attributes,
2208                                 ARRAY_SIZE(hotkey_mask_attributes));
2209                 if (res)
2210                         goto err_exit;
2211         }
2212
2213 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2214         if (tp_features.hotkey_mask) {
2215                 hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK
2216                                         & ~hotkey_all_mask;
2217         } else {
2218                 hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK;
2219         }
2220
2221         vdbg_printk(TPACPI_DBG_INIT,
2222                     "hotkey source mask 0x%08x, polling freq %d\n",
2223                     hotkey_source_mask, hotkey_poll_freq);
2224 #endif
2225
2226         /* Not all thinkpads have a hardware radio switch */
2227         if (acpi_evalf(hkey_handle, &status, "WLSW", "qd")) {
2228                 tp_features.hotkey_wlsw = 1;
2229                 printk(TPACPI_INFO
2230                         "radio switch found; radios are %s\n",
2231                         enabled(status, 0));
2232         }
2233         if (tp_features.hotkey_wlsw)
2234                 res = add_to_attr_set(hotkey_dev_attributes,
2235                                 &dev_attr_hotkey_radio_sw.attr);
2236
2237         /* For X41t, X60t, X61t Tablets... */
2238         if (!res && acpi_evalf(hkey_handle, &status, "MHKG", "qd")) {
2239                 tp_features.hotkey_tablet = 1;
2240                 printk(TPACPI_INFO
2241                         "possible tablet mode switch found; "
2242                         "ThinkPad in %s mode\n",
2243                         (status & TP_HOTKEY_TABLET_MASK)?
2244                                 "tablet" : "laptop");
2245                 res = add_to_attr_set(hotkey_dev_attributes,
2246                                 &dev_attr_hotkey_tablet_mode.attr);
2247         }
2248
2249         if (!res)
2250                 res = register_attr_set_with_sysfs(
2251                                 hotkey_dev_attributes,
2252                                 &tpacpi_pdev->dev.kobj);
2253         if (res)
2254                 goto err_exit;
2255
2256         /* Set up key map */
2257
2258         hotkey_keycode_map = kmalloc(TPACPI_HOTKEY_MAP_SIZE,
2259                                         GFP_KERNEL);
2260         if (!hotkey_keycode_map) {
2261                 printk(TPACPI_ERR
2262                         "failed to allocate memory for key map\n");
2263                 res = -ENOMEM;
2264                 goto err_exit;
2265         }
2266
2267         if (thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO) {
2268                 dbg_printk(TPACPI_DBG_INIT,
2269                            "using Lenovo default hot key map\n");
2270                 memcpy(hotkey_keycode_map, &lenovo_keycode_map,
2271                         TPACPI_HOTKEY_MAP_SIZE);
2272         } else {
2273                 dbg_printk(TPACPI_DBG_INIT,
2274                            "using IBM default hot key map\n");
2275                 memcpy(hotkey_keycode_map, &ibm_keycode_map,
2276                         TPACPI_HOTKEY_MAP_SIZE);
2277         }
2278
2279         set_bit(EV_KEY, tpacpi_inputdev->evbit);
2280         set_bit(EV_MSC, tpacpi_inputdev->evbit);
2281         set_bit(MSC_SCAN, tpacpi_inputdev->mscbit);
2282         tpacpi_inputdev->keycodesize = TPACPI_HOTKEY_MAP_TYPESIZE;
2283         tpacpi_inputdev->keycodemax = TPACPI_HOTKEY_MAP_LEN;
2284         tpacpi_inputdev->keycode = hotkey_keycode_map;
2285         for (i = 0; i < TPACPI_HOTKEY_MAP_LEN; i++) {
2286                 if (hotkey_keycode_map[i] != KEY_RESERVED) {
2287                         set_bit(hotkey_keycode_map[i],
2288                                 tpacpi_inputdev->keybit);
2289                 } else {
2290                         if (i < sizeof(hotkey_reserved_mask)*8)
2291                                 hotkey_reserved_mask |= 1 << i;
2292                 }
2293         }
2294
2295         if (tp_features.hotkey_wlsw) {
2296                 set_bit(EV_SW, tpacpi_inputdev->evbit);
2297                 set_bit(SW_RFKILL_ALL, tpacpi_inputdev->swbit);
2298         }
2299         if (tp_features.hotkey_tablet) {
2300                 set_bit(EV_SW, tpacpi_inputdev->evbit);
2301                 set_bit(SW_TABLET_MODE, tpacpi_inputdev->swbit);
2302         }
2303
2304         /* Do not issue duplicate brightness change events to
2305          * userspace */
2306         if (!tp_features.bright_acpimode)
2307                 /* update bright_acpimode... */
2308                 tpacpi_check_std_acpi_brightness_support();
2309
2310         if (tp_features.bright_acpimode) {
2311                 printk(TPACPI_INFO
2312                        "This ThinkPad has standard ACPI backlight "
2313                        "brightness control, supported by the ACPI "
2314                        "video driver\n");
2315                 printk(TPACPI_NOTICE
2316                        "Disabling thinkpad-acpi brightness events "
2317                        "by default...\n");
2318
2319                 /* The hotkey_reserved_mask change below is not
2320                  * necessary while the keys are at KEY_RESERVED in the
2321                  * default map, but better safe than sorry, leave it
2322                  * here as a marker of what we have to do, especially
2323                  * when we finally become able to set this at runtime
2324                  * on response to X.org requests */
2325                 hotkey_reserved_mask |=
2326                         (1 << TP_ACPI_HOTKEYSCAN_FNHOME)
2327                         | (1 << TP_ACPI_HOTKEYSCAN_FNEND);
2328         }
2329
2330         dbg_printk(TPACPI_DBG_INIT, "enabling hot key handling\n");
2331         res = hotkey_status_set(1);
2332         if (res) {
2333                 hotkey_exit();
2334                 return res;
2335         }
2336         res = hotkey_mask_set(((hotkey_all_mask | hotkey_source_mask)
2337                                 & ~hotkey_reserved_mask)
2338                                 | hotkey_orig_mask);
2339         if (res < 0 && res != -ENXIO) {
2340                 hotkey_exit();
2341                 return res;
2342         }
2343
2344         dbg_printk(TPACPI_DBG_INIT,
2345                         "legacy hot key reporting over procfs %s\n",
2346                         (hotkey_report_mode < 2) ?
2347                                 "enabled" : "disabled");
2348
2349         tpacpi_inputdev->open = &hotkey_inputdev_open;
2350         tpacpi_inputdev->close = &hotkey_inputdev_close;
2351
2352         hotkey_poll_setup_safe(1);
2353         tpacpi_send_radiosw_update();
2354         tpacpi_input_send_tabletsw();
2355
2356         return 0;
2357
2358 err_exit:
2359         delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
2360         hotkey_dev_attributes = NULL;
2361
2362         return (res < 0)? res : 1;
2363 }
2364
2365 static void hotkey_notify(struct ibm_struct *ibm, u32 event)
2366 {
2367         u32 hkey;
2368         unsigned int scancode;
2369         int send_acpi_ev;
2370         int ignore_acpi_ev;
2371         int unk_ev;
2372
2373         if (event != 0x80) {
2374                 printk(TPACPI_ERR
2375                        "unknown HKEY notification event %d\n", event);
2376                 /* forward it to userspace, maybe it knows how to handle it */
2377                 acpi_bus_generate_netlink_event(
2378                                         ibm->acpi->device->pnp.device_class,
2379                                         ibm->acpi->device->dev.bus_id,
2380                                         event, 0);
2381                 return;
2382         }
2383
2384         while (1) {
2385                 if (!acpi_evalf(hkey_handle, &hkey, "MHKP", "d")) {
2386                         printk(TPACPI_ERR "failed to retrieve HKEY event\n");
2387                         return;
2388                 }
2389
2390                 if (hkey == 0) {
2391                         /* queue empty */
2392                         return;
2393                 }
2394
2395                 send_acpi_ev = 1;
2396                 ignore_acpi_ev = 0;
2397                 unk_ev = 0;
2398
2399                 switch (hkey >> 12) {
2400                 case 1:
2401                         /* 0x1000-0x1FFF: key presses */
2402                         scancode = hkey & 0xfff;
2403                         if (scancode > 0 && scancode < 0x21) {
2404                                 scancode--;
2405                                 if (!(hotkey_source_mask & (1 << scancode))) {
2406                                         tpacpi_input_send_key(scancode);
2407                                         send_acpi_ev = 0;
2408                                 } else {
2409                                         ignore_acpi_ev = 1;
2410                                 }
2411                         } else {
2412                                 unk_ev = 1;
2413                         }
2414                         break;
2415                 case 2:
2416                         /* Wakeup reason */
2417                         switch (hkey) {
2418                         case 0x2304: /* suspend, undock */
2419                         case 0x2404: /* hibernation, undock */
2420                                 hotkey_wakeup_reason = TP_ACPI_WAKEUP_UNDOCK;
2421                                 ignore_acpi_ev = 1;
2422                                 break;
2423                         case 0x2305: /* suspend, bay eject */
2424                         case 0x2405: /* hibernation, bay eject */
2425                                 hotkey_wakeup_reason = TP_ACPI_WAKEUP_BAYEJ;
2426                                 ignore_acpi_ev = 1;
2427                                 break;
2428                         default:
2429                                 unk_ev = 1;
2430                         }
2431                         if (hotkey_wakeup_reason != TP_ACPI_WAKEUP_NONE) {
2432                                 printk(TPACPI_INFO
2433                                        "woke up due to a hot-unplug "
2434                                        "request...\n");
2435                                 hotkey_wakeup_reason_notify_change();
2436                         }
2437                         break;
2438                 case 3:
2439                         /* bay-related wakeups */
2440                         if (hkey == 0x3003) {
2441                                 hotkey_autosleep_ack = 1;
2442                                 printk(TPACPI_INFO
2443                                        "bay ejected\n");
2444                                 hotkey_wakeup_hotunplug_complete_notify_change();
2445                         } else {
2446                                 unk_ev = 1;
2447                         }
2448                         break;
2449                 case 4:
2450                         /* dock-related wakeups */
2451                         if (hkey == 0x4003) {
2452                                 hotkey_autosleep_ack = 1;
2453                                 printk(TPACPI_INFO
2454                                        "undocked\n");
2455                                 hotkey_wakeup_hotunplug_complete_notify_change();
2456                         } else {
2457                                 unk_ev = 1;
2458                         }
2459                         break;
2460                 case 5:
2461                         /* 0x5000-0x5FFF: human interface helpers */
2462                         switch (hkey) {
2463                         case 0x5010: /* Lenovo new BIOS: brightness changed */
2464                         case 0x500b: /* X61t: tablet pen inserted into bay */
2465                         case 0x500c: /* X61t: tablet pen removed from bay */
2466                                 break;
2467                         case 0x5009: /* X41t-X61t: swivel up (tablet mode) */
2468                         case 0x500a: /* X41t-X61t: swivel down (normal mode) */
2469                                 tpacpi_input_send_tabletsw();
2470                                 hotkey_tablet_mode_notify_change();
2471                                 send_acpi_ev = 0;
2472                                 break;
2473                         case 0x5001:
2474                         case 0x5002:
2475                                 /* LID switch events.  Do not propagate */
2476                                 ignore_acpi_ev = 1;
2477                                 break;
2478                         default:
2479                                 unk_ev = 1;
2480                         }
2481                         break;
2482                 case 7:
2483                         /* 0x7000-0x7FFF: misc */
2484                         if (tp_features.hotkey_wlsw && hkey == 0x7000) {
2485                                 tpacpi_send_radiosw_update();
2486                                 send_acpi_ev = 0;
2487                                 break;
2488                         }
2489                         /* fallthrough to default */
2490                 default:
2491                         unk_ev = 1;
2492                 }
2493                 if (unk_ev) {
2494                         printk(TPACPI_NOTICE
2495                                "unhandled HKEY event 0x%04x\n", hkey);
2496                 }
2497
2498                 /* Legacy events */
2499                 if (!ignore_acpi_ev &&
2500                     (send_acpi_ev || hotkey_report_mode < 2)) {
2501                         acpi_bus_generate_proc_event(ibm->acpi->device,
2502                                                      event, hkey);
2503                 }
2504
2505                 /* netlink events */
2506                 if (!ignore_acpi_ev && send_acpi_ev) {
2507                         acpi_bus_generate_netlink_event(
2508                                         ibm->acpi->device->pnp.device_class,
2509                                         ibm->acpi->device->dev.bus_id,
2510                                         event, hkey);
2511                 }
2512         }
2513 }
2514
2515 static void hotkey_suspend(pm_message_t state)
2516 {
2517         /* Do these on suspend, we get the events on early resume! */
2518         hotkey_wakeup_reason = TP_ACPI_WAKEUP_NONE;
2519         hotkey_autosleep_ack = 0;
2520 }
2521
2522 static void hotkey_resume(void)
2523 {
2524         tpacpi_disable_brightness_delay();
2525
2526         if (hotkey_mask_get())
2527                 printk(TPACPI_ERR
2528                        "error while trying to read hot key mask "
2529                        "from firmware\n");
2530         tpacpi_send_radiosw_update();
2531         hotkey_tablet_mode_notify_change();
2532         hotkey_wakeup_reason_notify_change();
2533         hotkey_wakeup_hotunplug_complete_notify_change();
2534         hotkey_poll_setup_safe(0);
2535 }
2536
2537 /* procfs -------------------------------------------------------------- */
2538 static int hotkey_read(char *p)
2539 {
2540         int res, status;
2541         int len = 0;
2542
2543         if (!tp_features.hotkey) {
2544                 len += sprintf(p + len, "status:\t\tnot supported\n");
2545                 return len;
2546         }
2547
2548         if (mutex_lock_interruptible(&hotkey_mutex))
2549                 return -ERESTARTSYS;
2550         res = hotkey_status_get(&status);
2551         if (!res)
2552                 res = hotkey_mask_get();
2553         mutex_unlock(&hotkey_mutex);
2554         if (res)
2555                 return res;
2556
2557         len += sprintf(p + len, "status:\t\t%s\n", enabled(status, 0));
2558         if (tp_features.hotkey_mask) {
2559                 len += sprintf(p + len, "mask:\t\t0x%08x\n", hotkey_mask);
2560                 len += sprintf(p + len,
2561                                "commands:\tenable, disable, reset, <mask>\n");
2562         } else {
2563                 len += sprintf(p + len, "mask:\t\tnot supported\n");
2564                 len += sprintf(p + len, "commands:\tenable, disable, reset\n");
2565         }
2566
2567         return len;
2568 }
2569
2570 static int hotkey_write(char *buf)
2571 {
2572         int res, status;
2573         u32 mask;
2574         char *cmd;
2575
2576         if (!tp_features.hotkey)
2577                 return -ENODEV;
2578
2579         if (mutex_lock_interruptible(&hotkey_mutex))
2580                 return -ERESTARTSYS;
2581
2582         status = -1;
2583         mask = hotkey_mask;
2584
2585         res = 0;
2586         while ((cmd = next_cmd(&buf))) {
2587                 if (strlencmp(cmd, "enable") == 0) {
2588                         status = 1;
2589                 } else if (strlencmp(cmd, "disable") == 0) {
2590                         status = 0;
2591                 } else if (strlencmp(cmd, "reset") == 0) {
2592                         status = hotkey_orig_status;
2593                         mask = hotkey_orig_mask;
2594                 } else if (sscanf(cmd, "0x%x", &mask) == 1) {
2595                         /* mask set */
2596                 } else if (sscanf(cmd, "%x", &mask) == 1) {
2597                         /* mask set */
2598                 } else {
2599                         res = -EINVAL;
2600                         goto errexit;
2601                 }
2602         }
2603         if (status != -1)
2604                 res = hotkey_status_set(status);
2605
2606         if (!res && mask != hotkey_mask)
2607                 res = hotkey_mask_set(mask);
2608
2609 errexit:
2610         mutex_unlock(&hotkey_mutex);
2611         return res;
2612 }
2613
2614 static const struct acpi_device_id ibm_htk_device_ids[] = {
2615         {TPACPI_ACPI_HKEY_HID, 0},
2616         {"", 0},
2617 };
2618
2619 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver = {
2620         .hid = ibm_htk_device_ids,
2621         .notify = hotkey_notify,
2622         .handle = &hkey_handle,
2623         .type = ACPI_DEVICE_NOTIFY,
2624 };
2625
2626 static struct ibm_struct hotkey_driver_data = {
2627         .name = "hotkey",
2628         .read = hotkey_read,
2629         .write = hotkey_write,
2630         .exit = hotkey_exit,
2631         .resume = hotkey_resume,
2632         .suspend = hotkey_suspend,
2633         .acpi = &ibm_hotkey_acpidriver,
2634 };
2635
2636 /*************************************************************************
2637  * Bluetooth subdriver
2638  */
2639
2640 enum {
2641         /* ACPI GBDC/SBDC bits */
2642         TP_ACPI_BLUETOOTH_HWPRESENT     = 0x01, /* Bluetooth hw available */
2643         TP_ACPI_BLUETOOTH_RADIOSSW      = 0x02, /* Bluetooth radio enabled */
2644         TP_ACPI_BLUETOOTH_UNK           = 0x04, /* unknown function */
2645 };
2646
2647 static struct rfkill *tpacpi_bluetooth_rfkill;
2648
2649 static int bluetooth_get_radiosw(void)
2650 {
2651         int status;
2652
2653         if (!tp_features.bluetooth)
2654                 return -ENODEV;
2655
2656         /* WLSW overrides bluetooth in firmware/hardware, reflect that */
2657         if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&status) && !status)
2658                 return RFKILL_STATE_HARD_BLOCKED;
2659
2660         if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
2661                 return -EIO;
2662
2663         return ((status & TP_ACPI_BLUETOOTH_RADIOSSW) != 0) ?
2664                 RFKILL_STATE_UNBLOCKED : RFKILL_STATE_SOFT_BLOCKED;
2665 }
2666
2667 static void bluetooth_update_rfk(void)
2668 {
2669         int status;
2670
2671         if (!tpacpi_bluetooth_rfkill)
2672                 return;
2673
2674         status = bluetooth_get_radiosw();
2675         if (status < 0)
2676                 return;
2677         rfkill_force_state(tpacpi_bluetooth_rfkill, status);
2678 }
2679
2680 static int bluetooth_set_radiosw(int radio_on, int update_rfk)
2681 {
2682         int status;
2683
2684         if (!tp_features.bluetooth)
2685                 return -ENODEV;
2686
2687         /* WLSW overrides bluetooth in firmware/hardware, but there is no
2688          * reason to risk weird behaviour. */
2689         if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&status) && !status
2690             && radio_on)
2691                 return -EPERM;
2692
2693         if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
2694                 return -EIO;
2695         if (radio_on)
2696                 status |= TP_ACPI_BLUETOOTH_RADIOSSW;
2697         else
2698                 status &= ~TP_ACPI_BLUETOOTH_RADIOSSW;
2699         if (!acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status))
2700                 return -EIO;
2701
2702         if (update_rfk)
2703                 bluetooth_update_rfk();
2704
2705         return 0;
2706 }
2707
2708 /* sysfs bluetooth enable ---------------------------------------------- */
2709 static ssize_t bluetooth_enable_show(struct device *dev,
2710                            struct device_attribute *attr,
2711                            char *buf)
2712 {
2713         int status;
2714
2715         status = bluetooth_get_radiosw();
2716         if (status < 0)
2717                 return status;
2718
2719         return snprintf(buf, PAGE_SIZE, "%d\n",
2720                         (status == RFKILL_STATE_UNBLOCKED) ? 1 : 0);
2721 }
2722
2723 static ssize_t bluetooth_enable_store(struct device *dev,
2724                             struct device_attribute *attr,
2725                             const char *buf, size_t count)
2726 {
2727         unsigned long t;
2728         int res;
2729
2730         if (parse_strtoul(buf, 1, &t))
2731                 return -EINVAL;
2732
2733         res = bluetooth_set_radiosw(t, 1);
2734
2735         return (res) ? res : count;
2736 }
2737
2738 static struct device_attribute dev_attr_bluetooth_enable =
2739         __ATTR(bluetooth_enable, S_IWUSR | S_IRUGO,
2740                 bluetooth_enable_show, bluetooth_enable_store);
2741
2742 /* --------------------------------------------------------------------- */
2743
2744 static struct attribute *bluetooth_attributes[] = {
2745         &dev_attr_bluetooth_enable.attr,
2746         NULL
2747 };
2748
2749 static const struct attribute_group bluetooth_attr_group = {
2750         .attrs = bluetooth_attributes,
2751 };
2752
2753 static int tpacpi_bluetooth_rfk_get(void *data, enum rfkill_state *state)
2754 {
2755         int bts = bluetooth_get_radiosw();
2756
2757         if (bts < 0)
2758                 return bts;
2759
2760         *state = bts;
2761         return 0;
2762 }
2763
2764 static int tpacpi_bluetooth_rfk_set(void *data, enum rfkill_state state)
2765 {
2766         return bluetooth_set_radiosw((state == RFKILL_STATE_UNBLOCKED), 0);
2767 }
2768
2769 static void bluetooth_exit(void)
2770 {
2771         if (tpacpi_bluetooth_rfkill)
2772                 rfkill_unregister(tpacpi_bluetooth_rfkill);
2773
2774         sysfs_remove_group(&tpacpi_pdev->dev.kobj,
2775                         &bluetooth_attr_group);
2776 }
2777
2778 static int __init bluetooth_init(struct ibm_init_struct *iibm)
2779 {
2780         int res;
2781         int status = 0;
2782
2783         vdbg_printk(TPACPI_DBG_INIT, "initializing bluetooth subdriver\n");
2784
2785         TPACPI_ACPIHANDLE_INIT(hkey);
2786
2787         /* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
2788            G4x, R30, R31, R40e, R50e, T20-22, X20-21 */
2789         tp_features.bluetooth = hkey_handle &&
2790             acpi_evalf(hkey_handle, &status, "GBDC", "qd");
2791
2792         vdbg_printk(TPACPI_DBG_INIT, "bluetooth is %s, status 0x%02x\n",
2793                 str_supported(tp_features.bluetooth),
2794                 status);
2795
2796         if (tp_features.bluetooth &&
2797             !(status & TP_ACPI_BLUETOOTH_HWPRESENT)) {
2798                 /* no bluetooth hardware present in system */
2799                 tp_features.bluetooth = 0;
2800                 dbg_printk(TPACPI_DBG_INIT,
2801                            "bluetooth hardware not installed\n");
2802         }
2803
2804         if (!tp_features.bluetooth)
2805                 return 1;
2806
2807         res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
2808                                 &bluetooth_attr_group);
2809         if (res)
2810                 return res;
2811
2812         res = tpacpi_new_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID,
2813                                 &tpacpi_bluetooth_rfkill,
2814                                 RFKILL_TYPE_BLUETOOTH,
2815                                 "tpacpi_bluetooth_sw",
2816                                 tpacpi_bluetooth_rfk_set,
2817                                 tpacpi_bluetooth_rfk_get);
2818         if (res) {
2819                 bluetooth_exit();
2820                 return res;
2821         }
2822
2823         return 0;
2824 }
2825
2826 /* procfs -------------------------------------------------------------- */
2827 static int bluetooth_read(char *p)
2828 {
2829         int len = 0;
2830         int status = bluetooth_get_radiosw();
2831
2832         if (!tp_features.bluetooth)
2833                 len += sprintf(p + len, "status:\t\tnot supported\n");
2834         else {
2835                 len += sprintf(p + len, "status:\t\t%s\n",
2836                                 (status == RFKILL_STATE_UNBLOCKED) ?
2837                                         "enabled" : "disabled");
2838                 len += sprintf(p + len, "commands:\tenable, disable\n");
2839         }
2840
2841         return len;
2842 }
2843
2844 static int bluetooth_write(char *buf)
2845 {
2846         char *cmd;
2847
2848         if (!tp_features.bluetooth)
2849                 return -ENODEV;
2850
2851         while ((cmd = next_cmd(&buf))) {
2852                 if (strlencmp(cmd, "enable") == 0) {
2853                         bluetooth_set_radiosw(1, 1);
2854                 } else if (strlencmp(cmd, "disable") == 0) {
2855                         bluetooth_set_radiosw(0, 1);
2856                 } else
2857                         return -EINVAL;
2858         }
2859
2860         return 0;
2861 }
2862
2863 static struct ibm_struct bluetooth_driver_data = {
2864         .name = "bluetooth",
2865         .read = bluetooth_read,
2866         .write = bluetooth_write,
2867         .exit = bluetooth_exit,
2868 };
2869
2870 /*************************************************************************
2871  * Wan subdriver
2872  */
2873
2874 enum {
2875         /* ACPI GWAN/SWAN bits */
2876         TP_ACPI_WANCARD_HWPRESENT       = 0x01, /* Wan hw available */
2877         TP_ACPI_WANCARD_RADIOSSW        = 0x02, /* Wan radio enabled */
2878         TP_ACPI_WANCARD_UNK             = 0x04, /* unknown function */
2879 };
2880
2881 static struct rfkill *tpacpi_wan_rfkill;
2882
2883 static int wan_get_radiosw(void)
2884 {
2885         int status;
2886
2887         if (!tp_features.wan)
2888                 return -ENODEV;
2889
2890         /* WLSW overrides WWAN in firmware/hardware, reflect that */
2891         if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&status) && !status)
2892                 return RFKILL_STATE_HARD_BLOCKED;
2893
2894         if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
2895                 return -EIO;
2896
2897         return ((status & TP_ACPI_WANCARD_RADIOSSW) != 0) ?
2898                 RFKILL_STATE_UNBLOCKED : RFKILL_STATE_SOFT_BLOCKED;
2899 }
2900
2901 static void wan_update_rfk(void)
2902 {
2903         int status;
2904
2905         if (!tpacpi_wan_rfkill)
2906                 return;
2907
2908         status = wan_get_radiosw();
2909         if (status < 0)
2910                 return;
2911         rfkill_force_state(tpacpi_wan_rfkill, status);
2912 }
2913
2914 static int wan_set_radiosw(int radio_on, int update_rfk)
2915 {
2916         int status;
2917
2918         if (!tp_features.wan)
2919                 return -ENODEV;
2920
2921         /* WLSW overrides bluetooth in firmware/hardware, but there is no
2922          * reason to risk weird behaviour. */
2923         if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&status) && !status
2924             && radio_on)
2925                 return -EPERM;
2926
2927         if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
2928                 return -EIO;
2929         if (radio_on)
2930                 status |= TP_ACPI_WANCARD_RADIOSSW;
2931         else
2932                 status &= ~TP_ACPI_WANCARD_RADIOSSW;
2933         if (!acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status))
2934                 return -EIO;
2935
2936         if (update_rfk)
2937                 wan_update_rfk();
2938
2939         return 0;
2940 }
2941
2942 /* sysfs wan enable ---------------------------------------------------- */
2943 static ssize_t wan_enable_show(struct device *dev,
2944                            struct device_attribute *attr,
2945                            char *buf)
2946 {
2947         int status;
2948
2949         status = wan_get_radiosw();
2950         if (status < 0)
2951                 return status;
2952
2953         return snprintf(buf, PAGE_SIZE, "%d\n",
2954                         (status == RFKILL_STATE_UNBLOCKED) ? 1 : 0);
2955 }
2956
2957 static ssize_t wan_enable_store(struct device *dev,
2958                             struct device_attribute *attr,
2959                             const char *buf, size_t count)
2960 {
2961         unsigned long t;
2962         int res;
2963
2964         if (parse_strtoul(buf, 1, &t))
2965                 return -EINVAL;
2966
2967         res = wan_set_radiosw(t, 1);
2968
2969         return (res) ? res : count;
2970 }
2971
2972 static struct device_attribute dev_attr_wan_enable =
2973         __ATTR(wwan_enable, S_IWUSR | S_IRUGO,
2974                 wan_enable_show, wan_enable_store);
2975
2976 /* --------------------------------------------------------------------- */
2977
2978 static struct attribute *wan_attributes[] = {
2979         &dev_attr_wan_enable.attr,
2980         NULL
2981 };
2982
2983 static const struct attribute_group wan_attr_group = {
2984         .attrs = wan_attributes,
2985 };
2986
2987 static int tpacpi_wan_rfk_get(void *data, enum rfkill_state *state)
2988 {
2989         int wans = wan_get_radiosw();
2990
2991         if (wans < 0)
2992                 return wans;
2993
2994         *state = wans;
2995         return 0;
2996 }
2997
2998 static int tpacpi_wan_rfk_set(void *data, enum rfkill_state state)
2999 {
3000         return wan_set_radiosw((state == RFKILL_STATE_UNBLOCKED), 0);
3001 }
3002
3003 static void wan_exit(void)
3004 {
3005         if (tpacpi_wan_rfkill)
3006                 rfkill_unregister(tpacpi_wan_rfkill);
3007
3008         sysfs_remove_group(&tpacpi_pdev->dev.kobj,
3009                 &wan_attr_group);
3010 }
3011
3012 static int __init wan_init(struct ibm_init_struct *iibm)
3013 {
3014         int res;
3015         int status = 0;
3016
3017         vdbg_printk(TPACPI_DBG_INIT, "initializing wan subdriver\n");
3018
3019         TPACPI_ACPIHANDLE_INIT(hkey);
3020
3021         tp_features.wan = hkey_handle &&
3022             acpi_evalf(hkey_handle, &status, "GWAN", "qd");
3023
3024         vdbg_printk(TPACPI_DBG_INIT, "wan is %s, status 0x%02x\n",
3025                 str_supported(tp_features.wan),
3026                 status);
3027
3028         if (tp_features.wan &&
3029             !(status & TP_ACPI_WANCARD_HWPRESENT)) {
3030                 /* no wan hardware present in system */
3031                 tp_features.wan = 0;
3032                 dbg_printk(TPACPI_DBG_INIT,
3033                            "wan hardware not installed\n");
3034         }
3035
3036         if (!tp_features.wan)
3037                 return 1;
3038
3039         res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
3040                                 &wan_attr_group);
3041         if (res)
3042                 return res;
3043
3044         res = tpacpi_new_rfkill(TPACPI_RFK_WWAN_SW_ID,
3045                                 &tpacpi_wan_rfkill,
3046                                 RFKILL_TYPE_WWAN,
3047                                 "tpacpi_wwan_sw",
3048                                 tpacpi_wan_rfk_set,
3049                                 tpacpi_wan_rfk_get);
3050         if (res) {
3051                 wan_exit();
3052                 return res;
3053         }
3054
3055         return 0;
3056 }
3057
3058 /* procfs -------------------------------------------------------------- */
3059 static int wan_read(char *p)
3060 {
3061         int len = 0;
3062         int status = wan_get_radiosw();
3063
3064         if (!tp_features.wan)
3065                 len += sprintf(p + len, "status:\t\tnot supported\n");
3066         else {
3067                 len += sprintf(p + len, "status:\t\t%s\n",
3068                                 (status == RFKILL_STATE_UNBLOCKED) ?
3069                                         "enabled" : "disabled");
3070                 len += sprintf(p + len, "commands:\tenable, disable\n");
3071         }
3072
3073         return len;
3074 }
3075
3076 static int wan_write(char *buf)
3077 {
3078         char *cmd;
3079
3080         if (!tp_features.wan)
3081                 return -ENODEV;
3082
3083         while ((cmd = next_cmd(&buf))) {
3084                 if (strlencmp(cmd, "enable") == 0) {
3085                         wan_set_radiosw(1, 1);
3086                 } else if (strlencmp(cmd, "disable") == 0) {
3087                         wan_set_radiosw(0, 1);
3088                 } else
3089                         return -EINVAL;
3090         }
3091
3092         return 0;
3093 }
3094
3095 static struct ibm_struct wan_driver_data = {
3096         .name = "wan",
3097         .read = wan_read,
3098         .write = wan_write,
3099         .exit = wan_exit,
3100 };
3101
3102 /*************************************************************************
3103  * Video subdriver
3104  */
3105
3106 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
3107
3108 enum video_access_mode {
3109         TPACPI_VIDEO_NONE = 0,
3110         TPACPI_VIDEO_570,       /* 570 */
3111         TPACPI_VIDEO_770,       /* 600e/x, 770e, 770x */
3112         TPACPI_VIDEO_NEW,       /* all others */
3113 };
3114
3115 enum {  /* video status flags, based on VIDEO_570 */
3116         TP_ACPI_VIDEO_S_LCD = 0x01,     /* LCD output enabled */
3117         TP_ACPI_VIDEO_S_CRT = 0x02,     /* CRT output enabled */
3118         TP_ACPI_VIDEO_S_DVI = 0x08,     /* DVI output enabled */
3119 };
3120
3121 enum {  /* TPACPI_VIDEO_570 constants */
3122         TP_ACPI_VIDEO_570_PHSCMD = 0x87,        /* unknown magic constant :( */
3123         TP_ACPI_VIDEO_570_PHSMASK = 0x03,       /* PHS bits that map to
3124                                                  * video_status_flags */
3125         TP_ACPI_VIDEO_570_PHS2CMD = 0x8b,       /* unknown magic constant :( */
3126         TP_ACPI_VIDEO_570_PHS2SET = 0x80,       /* unknown magic constant :( */
3127 };
3128
3129 static enum video_access_mode video_supported;
3130 static int video_orig_autosw;
3131
3132 static int video_autosw_get(void);
3133 static int video_autosw_set(int enable);
3134
3135 TPACPI_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID");       /* G41 */
3136
3137 static int __init video_init(struct ibm_init_struct *iibm)
3138 {
3139         int ivga;
3140
3141         vdbg_printk(TPACPI_DBG_INIT, "initializing video subdriver\n");
3142
3143         TPACPI_ACPIHANDLE_INIT(vid);
3144         TPACPI_ACPIHANDLE_INIT(vid2);
3145
3146         if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga)
3147                 /* G41, assume IVGA doesn't change */
3148                 vid_handle = vid2_handle;
3149
3150         if (!vid_handle)
3151                 /* video switching not supported on R30, R31 */
3152                 video_supported = TPACPI_VIDEO_NONE;
3153         else if (acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd"))
3154                 /* 570 */
3155                 video_supported = TPACPI_VIDEO_570;
3156         else if (acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd"))
3157                 /* 600e/x, 770e, 770x */
3158                 video_supported = TPACPI_VIDEO_770;
3159         else
3160                 /* all others */
3161                 video_supported = TPACPI_VIDEO_NEW;
3162
3163         vdbg_printk(TPACPI_DBG_INIT, "video is %s, mode %d\n",
3164                 str_supported(video_supported != TPACPI_VIDEO_NONE),
3165                 video_supported);
3166
3167         return (video_supported != TPACPI_VIDEO_NONE)? 0 : 1;
3168 }
3169
3170 static void video_exit(void)
3171 {
3172         dbg_printk(TPACPI_DBG_EXIT,
3173                    "restoring original video autoswitch mode\n");
3174         if (video_autosw_set(video_orig_autosw))
3175                 printk(TPACPI_ERR "error while trying to restore original "
3176                         "video autoswitch mode\n");
3177 }
3178
3179 static int video_outputsw_get(void)
3180 {
3181         int status = 0;
3182         int i;
3183
3184         switch (video_supported) {
3185         case TPACPI_VIDEO_570:
3186                 if (!acpi_evalf(NULL, &i, "\\_SB.PHS", "dd",
3187                                  TP_ACPI_VIDEO_570_PHSCMD))
3188                         return -EIO;
3189                 status = i & TP_ACPI_VIDEO_570_PHSMASK;
3190                 break;
3191         case TPACPI_VIDEO_770:
3192                 if (!acpi_evalf(NULL, &i, "\\VCDL", "d"))
3193                         return -EIO;
3194                 if (i)
3195                         status |= TP_ACPI_VIDEO_S_LCD;
3196                 if (!acpi_evalf(NULL, &i, "\\VCDC", "d"))
3197                         return -EIO;
3198                 if (i)
3199                         status |= TP_ACPI_VIDEO_S_CRT;
3200                 break;
3201         case TPACPI_VIDEO_NEW:
3202                 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1) ||
3203                     !acpi_evalf(NULL, &i, "\\VCDC", "d"))
3204                         return -EIO;
3205                 if (i)
3206                         status |= TP_ACPI_VIDEO_S_CRT;
3207
3208                 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0) ||
3209                     !acpi_evalf(NULL, &i, "\\VCDL", "d"))
3210                         return -EIO;
3211                 if (i)
3212                         status |= TP_ACPI_VIDEO_S_LCD;
3213                 if (!acpi_evalf(NULL, &i, "\\VCDD", "d"))
3214                         return -EIO;
3215                 if (i)
3216                         status |= TP_ACPI_VIDEO_S_DVI;
3217                 break;
3218         default:
3219                 return -ENOSYS;
3220         }
3221
3222         return status;
3223 }
3224
3225 static int video_outputsw_set(int status)
3226 {
3227         int autosw;
3228         int res = 0;
3229
3230         switch (video_supported) {
3231         case TPACPI_VIDEO_570:
3232                 res = acpi_evalf(NULL, NULL,
3233                                  "\\_SB.PHS2", "vdd",
3234                                  TP_ACPI_VIDEO_570_PHS2CMD,
3235                                  status | TP_ACPI_VIDEO_570_PHS2SET);
3236                 break;
3237         case TPACPI_VIDEO_770:
3238                 autosw = video_autosw_get();
3239                 if (autosw < 0)
3240                         return autosw;
3241
3242                 res = video_autosw_set(1);
3243                 if (res)
3244                         return res;
3245                 res = acpi_evalf(vid_handle, NULL,
3246                                  "ASWT", "vdd", status * 0x100, 0);
3247                 if (!autosw && video_autosw_set(autosw)) {
3248                         printk(TPACPI_ERR
3249                                "video auto-switch left enabled due to error\n");
3250                         return -EIO;
3251                 }
3252                 break;
3253         case TPACPI_VIDEO_NEW:
3254                 res = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) &&
3255                       acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1);
3256                 break;
3257         default:
3258                 return -ENOSYS;
3259         }
3260
3261         return (res)? 0 : -EIO;
3262 }
3263
3264 static int video_autosw_get(void)
3265 {
3266         int autosw = 0;
3267
3268         switch (video_supported) {
3269         case TPACPI_VIDEO_570:
3270                 if (!acpi_evalf(vid_handle, &autosw, "SWIT", "d"))
3271                         return -EIO;
3272                 break;
3273         case TPACPI_VIDEO_770:
3274         case TPACPI_VIDEO_NEW:
3275                 if (!acpi_evalf(vid_handle, &autosw, "^VDEE", "d"))
3276                         return -EIO;
3277                 break;
3278         default:
3279                 return -ENOSYS;
3280         }
3281
3282         return autosw & 1;
3283 }
3284
3285 static int video_autosw_set(int enable)
3286 {
3287         if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", (enable)? 1 : 0))
3288                 return -EIO;
3289         return 0;
3290 }
3291
3292 static int video_outputsw_cycle(void)
3293 {
3294         int autosw = video_autosw_get();
3295         int res;
3296
3297         if (autosw < 0)
3298                 return autosw;
3299
3300         switch (video_supported) {
3301         case TPACPI_VIDEO_570:
3302                 res = video_autosw_set(1);
3303                 if (res)
3304                         return res;
3305                 res = acpi_evalf(ec_handle, NULL, "_Q16", "v");
3306                 break;
3307         case TPACPI_VIDEO_770:
3308         case TPACPI_VIDEO_NEW:
3309                 res = video_autosw_set(1);
3310                 if (res)
3311                         return res;
3312                 res = acpi_evalf(vid_handle, NULL, "VSWT", "v");
3313                 break;
3314         default:
3315                 return -ENOSYS;
3316         }
3317         if (!autosw && video_autosw_set(autosw)) {
3318                 printk(TPACPI_ERR
3319                        "video auto-switch left enabled due to error\n");
3320                 return -EIO;
3321         }
3322
3323         return (res)? 0 : -EIO;
3324 }
3325
3326 static int video_expand_toggle(void)
3327 {
3328         switch (video_supported) {
3329         case TPACPI_VIDEO_570:
3330                 return acpi_evalf(ec_handle, NULL, "_Q17", "v")?
3331                         0 : -EIO;
3332         case TPACPI_VIDEO_770:
3333                 return acpi_evalf(vid_handle, NULL, "VEXP", "v")?
3334                         0 : -EIO;
3335         case TPACPI_VIDEO_NEW:
3336                 return acpi_evalf(NULL, NULL, "\\VEXP", "v")?
3337                         0 : -EIO;
3338         default:
3339                 return -ENOSYS;
3340         }
3341         /* not reached */
3342 }
3343
3344 static int video_read(char *p)
3345 {
3346         int status, autosw;
3347         int len = 0;
3348
3349         if (video_supported == TPACPI_VIDEO_NONE) {
3350                 len += sprintf(p + len, "status:\t\tnot supported\n");
3351                 return len;
3352         }
3353
3354         status = video_outputsw_get();
3355         if (status < 0)
3356                 return status;
3357
3358         autosw = video_autosw_get();
3359         if (autosw < 0)
3360                 return autosw;
3361
3362         len += sprintf(p + len, "status:\t\tsupported\n");
3363         len += sprintf(p + len, "lcd:\t\t%s\n", enabled(status, 0));
3364         len += sprintf(p + len, "crt:\t\t%s\n", enabled(status, 1));
3365         if (video_supported == TPACPI_VIDEO_NEW)
3366                 len += sprintf(p + len, "dvi:\t\t%s\n", enabled(status, 3));
3367         len += sprintf(p + len, "auto:\t\t%s\n", enabled(autosw, 0));
3368         len += sprintf(p + len, "commands:\tlcd_enable, lcd_disable\n");
3369         len += sprintf(p + len, "commands:\tcrt_enable, crt_disable\n");
3370         if (video_supported == TPACPI_VIDEO_NEW)
3371                 len += sprintf(p + len, "commands:\tdvi_enable, dvi_disable\n");
3372         len += sprintf(p + len, "commands:\tauto_enable, auto_disable\n");
3373         len += sprintf(p + len, "commands:\tvideo_switch, expand_toggle\n");
3374
3375         return len;
3376 }
3377
3378 static int video_write(char *buf)
3379 {
3380         char *cmd;
3381         int enable, disable, status;
3382         int res;
3383
3384         if (video_supported == TPACPI_VIDEO_NONE)
3385                 return -ENODEV;
3386
3387         enable = 0;
3388         disable = 0;
3389
3390         while ((cmd = next_cmd(&buf))) {
3391                 if (strlencmp(cmd, "lcd_enable") == 0) {
3392                         enable |= TP_ACPI_VIDEO_S_LCD;
3393                 } else if (strlencmp(cmd, "lcd_disable") == 0) {
3394                         disable |= TP_ACPI_VIDEO_S_LCD;
3395                 } else if (strlencmp(cmd, "crt_enable") == 0) {
3396                         enable |= TP_ACPI_VIDEO_S_CRT;
3397                 } else if (strlencmp(cmd, "crt_disable") == 0) {
3398                         disable |= TP_ACPI_VIDEO_S_CRT;
3399                 } else if (video_supported == TPACPI_VIDEO_NEW &&
3400                            strlencmp(cmd, "dvi_enable") == 0) {
3401                         enable |= TP_ACPI_VIDEO_S_DVI;
3402                 } else if (video_supported == TPACPI_VIDEO_NEW &&
3403                            strlencmp(cmd, "dvi_disable") == 0) {
3404                         disable |= TP_ACPI_VIDEO_S_DVI;
3405                 } else if (strlencmp(cmd, "auto_enable") == 0) {
3406                         res = video_autosw_set(1);
3407                         if (res)
3408                                 return res;
3409                 } else if (strlencmp(cmd, "auto_disable") == 0) {
3410                         res = video_autosw_set(0);
3411                         if (res)
3412                                 return res;
3413                 } else if (strlencmp(cmd, "video_switch") == 0) {
3414                         res = video_outputsw_cycle();
3415                         if (res)
3416                                 return res;
3417                 } else if (strlencmp(cmd, "expand_toggle") == 0) {
3418                         res = video_expand_toggle();
3419                         if (res)
3420                                 return res;
3421                 } else
3422                         return -EINVAL;
3423         }
3424
3425         if (enable || disable) {
3426                 status = video_outputsw_get();
3427                 if (status < 0)
3428                         return status;
3429                 res = video_outputsw_set((status & ~disable) | enable);
3430                 if (res)
3431                         return res;
3432         }
3433
3434         return 0;
3435 }
3436
3437 static struct ibm_struct video_driver_data = {
3438         .name = "video",
3439         .read = video_read,
3440         .write = video_write,
3441         .exit = video_exit,
3442 };
3443
3444 #endif /* CONFIG_THINKPAD_ACPI_VIDEO */
3445
3446 /*************************************************************************
3447  * Light (thinklight) subdriver
3448  */
3449
3450 TPACPI_HANDLE(lght, root, "\\LGHT");    /* A21e, A2xm/p, T20-22, X20-21 */
3451 TPACPI_HANDLE(ledb, ec, "LEDB");                /* G4x */
3452
3453 static int light_get_status(void)
3454 {
3455         int status = 0;
3456
3457         if (tp_features.light_status) {
3458                 if (!acpi_evalf(ec_handle, &status, "KBLT", "d"))
3459                         return -EIO;
3460                 return (!!status);
3461         }
3462
3463         return -ENXIO;
3464 }
3465
3466 static int light_set_status(int status)
3467 {
3468         int rc;
3469
3470         if (tp_features.light) {
3471                 if (cmos_handle) {
3472                         rc = acpi_evalf(cmos_handle, NULL, NULL, "vd",
3473                                         (status)?
3474                                                 TP_CMOS_THINKLIGHT_ON :
3475                                                 TP_CMOS_THINKLIGHT_OFF);
3476                 } else {
3477                         rc = acpi_evalf(lght_handle, NULL, NULL, "vd",
3478                                         (status)? 1 : 0);
3479                 }
3480                 return (rc)? 0 : -EIO;
3481         }
3482
3483         return -ENXIO;
3484 }
3485
3486 static void light_set_status_worker(struct work_struct *work)
3487 {
3488         struct tpacpi_led_classdev *data =
3489                         container_of(work, struct tpacpi_led_classdev, work);
3490
3491         if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING))
3492                 light_set_status((data->new_brightness != LED_OFF));
3493 }
3494
3495 static void light_sysfs_set(struct led_classdev *led_cdev,
3496                         enum led_brightness brightness)
3497 {
3498         struct tpacpi_led_classdev *data =
3499                 container_of(led_cdev,
3500                              struct tpacpi_led_classdev,
3501                              led_classdev);
3502         data->new_brightness = brightness;
3503         queue_work(tpacpi_wq, &data->work);
3504 }
3505
3506 static enum led_brightness light_sysfs_get(struct led_classdev *led_cdev)
3507 {
3508         return (light_get_status() == 1)? LED_FULL : LED_OFF;
3509 }
3510
3511 static struct tpacpi_led_classdev tpacpi_led_thinklight = {
3512         .led_classdev = {
3513                 .name           = "tpacpi::thinklight",
3514                 .brightness_set = &light_sysfs_set,
3515                 .brightness_get = &light_sysfs_get,
3516         }
3517 };
3518
3519 static int __init light_init(struct ibm_init_struct *iibm)
3520 {
3521         int rc;
3522
3523         vdbg_printk(TPACPI_DBG_INIT, "initializing light subdriver\n");
3524
3525         TPACPI_ACPIHANDLE_INIT(ledb);
3526         TPACPI_ACPIHANDLE_INIT(lght);
3527         TPACPI_ACPIHANDLE_INIT(cmos);
3528         INIT_WORK(&tpacpi_led_thinklight.work, light_set_status_worker);
3529
3530         /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */
3531         tp_features.light = (cmos_handle || lght_handle) && !ledb_handle;
3532
3533         if (tp_features.light)
3534                 /* light status not supported on
3535                    570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */
3536                 tp_features.light_status =
3537                         acpi_evalf(ec_handle, NULL, "KBLT", "qv");
3538
3539         vdbg_printk(TPACPI_DBG_INIT, "light is %s, light status is %s\n",
3540                 str_supported(tp_features.light),
3541                 str_supported(tp_features.light_status));
3542
3543         if (!tp_features.light)
3544                 return 1;
3545
3546         rc = led_classdev_register(&tpacpi_pdev->dev,
3547                                    &tpacpi_led_thinklight.led_classdev);
3548
3549         if (rc < 0) {
3550                 tp_features.light = 0;
3551                 tp_features.light_status = 0;
3552         } else  {
3553                 rc = 0;
3554         }
3555
3556         return rc;
3557 }
3558
3559 static void light_exit(void)
3560 {
3561         led_classdev_unregister(&tpacpi_led_thinklight.led_classdev);
3562         if (work_pending(&tpacpi_led_thinklight.work))
3563                 flush_workqueue(tpacpi_wq);
3564 }
3565
3566 static int light_read(char *p)
3567 {
3568         int len = 0;
3569         int status;
3570
3571         if (!tp_features.light) {
3572                 len += sprintf(p + len, "status:\t\tnot supported\n");
3573         } else if (!tp_features.light_status) {
3574                 len += sprintf(p + len, "status:\t\tunknown\n");
3575                 len += sprintf(p + len, "commands:\ton, off\n");
3576         } else {
3577                 status = light_get_status();
3578                 if (status < 0)
3579                         return status;
3580                 len += sprintf(p + len, "status:\t\t%s\n", onoff(status, 0));
3581                 len += sprintf(p + len, "commands:\ton, off\n");
3582         }
3583
3584         return len;
3585 }
3586
3587 static int light_write(char *buf)
3588 {
3589         char *cmd;
3590         int newstatus = 0;
3591
3592         if (!tp_features.light)
3593                 return -ENODEV;
3594
3595         while ((cmd = next_cmd(&buf))) {
3596                 if (strlencmp(cmd, "on") == 0) {
3597                         newstatus = 1;
3598                 } else if (strlencmp(cmd, "off") == 0) {
3599                         newstatus = 0;
3600                 } else
3601                         return -EINVAL;
3602         }
3603
3604         return light_set_status(newstatus);
3605 }
3606
3607 static struct ibm_struct light_driver_data = {
3608         .name = "light",
3609         .read = light_read,
3610         .write = light_write,
3611         .exit = light_exit,
3612 };
3613
3614 /*************************************************************************
3615  * Dock subdriver
3616  */
3617
3618 #ifdef CONFIG_THINKPAD_ACPI_DOCK
3619
3620 static void dock_notify(struct ibm_struct *ibm, u32 event);
3621 static int dock_read(char *p);
3622 static int dock_write(char *buf);
3623
3624 TPACPI_HANDLE(dock, root, "\\_SB.GDCK", /* X30, X31, X40 */
3625            "\\_SB.PCI0.DOCK",   /* 600e/x,770e,770x,A2xm/p,T20-22,X20-21 */
3626            "\\_SB.PCI0.PCI1.DOCK",      /* all others */
3627            "\\_SB.PCI.ISA.SLCE",        /* 570 */
3628     );                          /* A21e,G4x,R30,R31,R32,R40,R40e,R50e */
3629
3630 /* don't list other alternatives as we install a notify handler on the 570 */
3631 TPACPI_HANDLE(pci, root, "\\_SB.PCI");  /* 570 */
3632
3633 static const struct acpi_device_id ibm_pci_device_ids[] = {
3634         {PCI_ROOT_HID_STRING, 0},
3635         {"", 0},
3636 };
3637
3638 static struct tp_acpi_drv_struct ibm_dock_acpidriver[2] = {
3639         {
3640          .notify = dock_notify,
3641          .handle = &dock_handle,
3642          .type = ACPI_SYSTEM_NOTIFY,
3643         },
3644         {
3645         /* THIS ONE MUST NEVER BE USED FOR DRIVER AUTOLOADING.
3646          * We just use it to get notifications of dock hotplug
3647          * in very old thinkpads */
3648          .hid = ibm_pci_device_ids,
3649          .notify = dock_notify,
3650          .handle = &pci_handle,
3651          .type = ACPI_SYSTEM_NOTIFY,
3652         },
3653 };
3654
3655 static struct ibm_struct dock_driver_data[2] = {
3656         {
3657          .name = "dock",
3658          .read = dock_read,
3659          .write = dock_write,
3660          .acpi = &ibm_dock_acpidriver[0],
3661         },
3662         {
3663          .name = "dock",
3664          .acpi = &ibm_dock_acpidriver[1],
3665         },
3666 };
3667
3668 #define dock_docked() (_sta(dock_handle) & 1)
3669
3670 static int __init dock_init(struct ibm_init_struct *iibm)
3671 {
3672         vdbg_printk(TPACPI_DBG_INIT, "initializing dock subdriver\n");
3673
3674         TPACPI_ACPIHANDLE_INIT(dock);
3675
3676         vdbg_printk(TPACPI_DBG_INIT, "dock is %s\n",
3677                 str_supported(dock_handle != NULL));
3678
3679         return (dock_handle)? 0 : 1;
3680 }
3681
3682 static int __init dock_init2(struct ibm_init_struct *iibm)
3683 {
3684         int dock2_needed;
3685
3686         vdbg_printk(TPACPI_DBG_INIT, "initializing dock subdriver part 2\n");
3687
3688         if (dock_driver_data[0].flags.acpi_driver_registered &&
3689             dock_driver_data[0].flags.acpi_notify_installed) {
3690                 TPACPI_ACPIHANDLE_INIT(pci);
3691                 dock2_needed = (pci_handle != NULL);
3692                 vdbg_printk(TPACPI_DBG_INIT,
3693                             "dock PCI handler for the TP 570 is %s\n",
3694                             str_supported(dock2_needed));
3695         } else {
3696                 vdbg_printk(TPACPI_DBG_INIT,
3697                 "dock subdriver part 2 not required\n");
3698                 dock2_needed = 0;
3699         }
3700
3701         return (dock2_needed)? 0 : 1;
3702 }
3703
3704 static void dock_notify(struct ibm_struct *ibm, u32 event)
3705 {
3706         int docked = dock_docked();
3707         int pci = ibm->acpi->hid && ibm->acpi->device &&
3708                 acpi_match_device_ids(ibm->acpi->device, ibm_pci_device_ids);
3709         int data;
3710
3711         if (event == 1 && !pci) /* 570 */
3712                 data = 1;       /* button */
3713         else if (event == 1 && pci)     /* 570 */
3714                 data = 3;       /* dock */
3715         else if (event == 3 && docked)
3716                 data = 1;       /* button */
3717         else if (event == 3 && !docked)
3718                 data = 2;       /* undock */
3719         else if (event == 0 && docked)
3720                 data = 3;       /* dock */
3721         else {
3722                 printk(TPACPI_ERR "unknown dock event %d, status %d\n",
3723                        event, _sta(dock_handle));
3724                 data = 0;       /* unknown */
3725         }
3726         acpi_bus_generate_proc_event(ibm->acpi->device, event, data);
3727         acpi_bus_generate_netlink_event(ibm->acpi->device->pnp.device_class,
3728                                           ibm->acpi->device->dev.bus_id,
3729                                           event, data);
3730 }
3731
3732 static int dock_read(char *p)
3733 {
3734         int len = 0;
3735         int docked = dock_docked();
3736
3737         if (!dock_handle)
3738                 len += sprintf(p + len, "status:\t\tnot supported\n");
3739         else if (!docked)
3740                 len += sprintf(p + len, "status:\t\tundocked\n");
3741         else {
3742                 len += sprintf(p + len, "status:\t\tdocked\n");
3743                 len += sprintf(p + len, "commands:\tdock, undock\n");
3744         }
3745
3746         return len;
3747 }
3748
3749 static int dock_write(char *buf)
3750 {
3751         char *cmd;
3752
3753         if (!dock_docked())
3754                 return -ENODEV;
3755
3756         while ((cmd = next_cmd(&buf))) {
3757                 if (strlencmp(cmd, "undock") == 0) {
3758                         if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 0) ||
3759                             !acpi_evalf(dock_handle, NULL, "_EJ0", "vd", 1))
3760                                 return -EIO;
3761                 } else if (strlencmp(cmd, "dock") == 0) {
3762                         if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 1))
3763                                 return -EIO;
3764                 } else
3765                         return -EINVAL;
3766         }
3767
3768         return 0;
3769 }
3770
3771 #endif /* CONFIG_THINKPAD_ACPI_DOCK */
3772
3773 /*************************************************************************
3774  * Bay subdriver
3775  */
3776
3777 #ifdef CONFIG_THINKPAD_ACPI_BAY
3778
3779 TPACPI_HANDLE(bay, root, "\\_SB.PCI.IDE.SECN.MAST",     /* 570 */
3780            "\\_SB.PCI0.IDE0.IDES.IDSM", /* 600e/x, 770e, 770x */
3781            "\\_SB.PCI0.SATA.SCND.MSTR", /* T60, X60, Z60 */
3782            "\\_SB.PCI0.IDE0.SCND.MSTR", /* all others */
3783            );                           /* A21e, R30, R31 */
3784 TPACPI_HANDLE(bay_ej, bay, "_EJ3",      /* 600e/x, A2xm/p, A3x */
3785            "_EJ0",              /* all others */
3786            );                   /* 570,A21e,G4x,R30,R31,R32,R40e,R50e */
3787 TPACPI_HANDLE(bay2, root, "\\_SB.PCI0.IDE0.PRIM.SLAV",  /* A3x, R32 */
3788            "\\_SB.PCI0.IDE0.IDEP.IDPS", /* 600e/x, 770e, 770x */
3789            );                           /* all others */
3790 TPACPI_HANDLE(bay2_ej, bay2, "_EJ3",    /* 600e/x, 770e, A3x */
3791            "_EJ0",                      /* 770x */
3792            );                           /* all others */
3793
3794 static int __init bay_init(struct ibm_init_struct *iibm)
3795 {
3796         vdbg_printk(TPACPI_DBG_INIT, "initializing bay subdriver\n");
3797
3798         TPACPI_ACPIHANDLE_INIT(bay);
3799         if (bay_handle)
3800                 TPACPI_ACPIHANDLE_INIT(bay_ej);
3801         TPACPI_ACPIHANDLE_INIT(bay2);
3802         if (bay2_handle)
3803                 TPACPI_ACPIHANDLE_INIT(bay2_ej);
3804
3805         tp_features.bay_status = bay_handle &&
3806                 acpi_evalf(bay_handle, NULL, "_STA", "qv");
3807         tp_features.bay_status2 = bay2_handle &&
3808                 acpi_evalf(bay2_handle, NULL, "_STA", "qv");
3809
3810         tp_features.bay_eject = bay_handle && bay_ej_handle &&
3811                 (strlencmp(bay_ej_path, "_EJ0") == 0 || experimental);
3812         tp_features.bay_eject2 = bay2_handle && bay2_ej_handle &&
3813                 (strlencmp(bay2_ej_path, "_EJ0") == 0 || experimental);
3814
3815         vdbg_printk(TPACPI_DBG_INIT,
3816                 "bay 1: status %s, eject %s; bay 2: status %s, eject %s\n",
3817                 str_supported(tp_features.bay_status),
3818                 str_supported(tp_features.bay_eject),
3819                 str_supported(tp_features.bay_status2),
3820                 str_supported(tp_features.bay_eject2));
3821
3822         return (tp_features.bay_status || tp_features.bay_eject ||
3823                 tp_features.bay_status2 || tp_features.bay_eject2)? 0 : 1;
3824 }
3825
3826 static void bay_notify(struct ibm_struct *ibm, u32 event)
3827 {
3828         acpi_bus_generate_proc_event(ibm->acpi->device, event, 0);
3829         acpi_bus_generate_netlink_event(ibm->acpi->device->pnp.device_class,
3830                                           ibm->acpi->device->dev.bus_id,
3831                                           event, 0);
3832 }
3833
3834 #define bay_occupied(b) (_sta(b##_handle) & 1)
3835
3836 static int bay_read(char *p)
3837 {
3838         int len = 0;
3839         int occupied = bay_occupied(bay);
3840         int occupied2 = bay_occupied(bay2);
3841         int eject, eject2;
3842
3843         len += sprintf(p + len, "status:\t\t%s\n",
3844                 tp_features.bay_status ?
3845                         (occupied ? "occupied" : "unoccupied") :
3846                                 "not supported");
3847         if (tp_features.bay_status2)
3848                 len += sprintf(p + len, "status2:\t%s\n", occupied2 ?
3849                                "occupied" : "unoccupied");
3850
3851         eject = tp_features.bay_eject && occupied;
3852         eject2 = tp_features.bay_eject2 && occupied2;
3853
3854         if (eject && eject2)
3855                 len += sprintf(p + len, "commands:\teject, eject2\n");
3856         else if (eject)
3857                 len += sprintf(p + len, "commands:\teject\n");
3858         else if (eject2)
3859                 len += sprintf(p + len, "commands:\teject2\n");
3860
3861         return len;
3862 }
3863
3864 static int bay_write(char *buf)
3865 {
3866         char *cmd;
3867
3868         if (!tp_features.bay_eject && !tp_features.bay_eject2)
3869                 return -ENODEV;
3870
3871         while ((cmd = next_cmd(&buf))) {
3872                 if (tp_features.bay_eject && strlencmp(cmd, "eject") == 0) {
3873                         if (!acpi_evalf(bay_ej_handle, NULL, NULL, "vd", 1))
3874                                 return -EIO;
3875                 } else if (tp_features.bay_eject2 &&
3876                            strlencmp(cmd, "eject2") == 0) {
3877                         if (!acpi_evalf(bay2_ej_handle, NULL, NULL, "vd", 1))
3878                                 return -EIO;
3879                 } else
3880                         return -EINVAL;
3881         }
3882
3883         return 0;
3884 }
3885
3886 static struct tp_acpi_drv_struct ibm_bay_acpidriver = {
3887         .notify = bay_notify,
3888         .handle = &bay_handle,
3889         .type = ACPI_SYSTEM_NOTIFY,
3890 };
3891
3892 static struct ibm_struct bay_driver_data = {
3893         .name = "bay",
3894         .read = bay_read,
3895         .write = bay_write,
3896         .acpi = &ibm_bay_acpidriver,
3897 };
3898
3899 #endif /* CONFIG_THINKPAD_ACPI_BAY */
3900
3901 /*************************************************************************
3902  * CMOS subdriver
3903  */
3904
3905 /* sysfs cmos_command -------------------------------------------------- */
3906 static ssize_t cmos_command_store(struct device *dev,
3907                             struct device_attribute *attr,
3908                             const char *buf, size_t count)
3909 {
3910         unsigned long cmos_cmd;
3911         int res;
3912
3913         if (parse_strtoul(buf, 21, &cmos_cmd))
3914                 return -EINVAL;
3915
3916         res = issue_thinkpad_cmos_command(cmos_cmd);
3917         return (res)? res : count;
3918 }
3919
3920 static struct device_attribute dev_attr_cmos_command =
3921         __ATTR(cmos_command, S_IWUSR, NULL, cmos_command_store);
3922
3923 /* --------------------------------------------------------------------- */
3924
3925 static int __init cmos_init(struct ibm_init_struct *iibm)
3926 {
3927         int res;
3928
3929         vdbg_printk(TPACPI_DBG_INIT,
3930                 "initializing cmos commands subdriver\n");
3931
3932         TPACPI_ACPIHANDLE_INIT(cmos);
3933
3934         vdbg_printk(TPACPI_DBG_INIT, "cmos commands are %s\n",
3935                 str_supported(cmos_handle != NULL));
3936
3937         res = device_create_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
3938         if (res)
3939                 return res;
3940
3941         return (cmos_handle)? 0 : 1;
3942 }
3943
3944 static void cmos_exit(void)
3945 {
3946         device_remove_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
3947 }
3948
3949 static int cmos_read(char *p)
3950 {
3951         int len = 0;
3952
3953         /* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
3954            R30, R31, T20-22, X20-21 */
3955         if (!cmos_handle)
3956                 len += sprintf(p + len, "status:\t\tnot supported\n");
3957         else {
3958                 len += sprintf(p + len, "status:\t\tsupported\n");
3959                 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-21)\n");
3960         }
3961
3962         return len;
3963 }
3964
3965 static int cmos_write(char *buf)
3966 {
3967         char *cmd;
3968         int cmos_cmd, res;
3969
3970         while ((cmd = next_cmd(&buf))) {
3971                 if (sscanf(cmd, "%u", &cmos_cmd) == 1 &&
3972                     cmos_cmd >= 0 && cmos_cmd <= 21) {
3973                         /* cmos_cmd set */
3974                 } else
3975                         return -EINVAL;
3976
3977                 res = issue_thinkpad_cmos_command(cmos_cmd);
3978                 if (res)
3979                         return res;
3980         }
3981
3982         return 0;
3983 }
3984
3985 static struct ibm_struct cmos_driver_data = {
3986         .name = "cmos",
3987         .read = cmos_read,
3988         .write = cmos_write,
3989         .exit = cmos_exit,
3990 };
3991
3992 /*************************************************************************
3993  * LED subdriver
3994  */
3995
3996 enum led_access_mode {
3997         TPACPI_LED_NONE = 0,
3998         TPACPI_LED_570, /* 570 */
3999         TPACPI_LED_OLD, /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
4000         TPACPI_LED_NEW, /* all others */
4001 };
4002
4003 enum {  /* For TPACPI_LED_OLD */
4004         TPACPI_LED_EC_HLCL = 0x0c,      /* EC reg to get led to power on */
4005         TPACPI_LED_EC_HLBL = 0x0d,      /* EC reg to blink a lit led */
4006         TPACPI_LED_EC_HLMS = 0x0e,      /* EC reg to select led to command */
4007 };
4008
4009 enum led_status_t {
4010         TPACPI_LED_OFF = 0,
4011         TPACPI_LED_ON,
4012         TPACPI_LED_BLINK,
4013 };
4014
4015 static enum led_access_mode led_supported;
4016
4017 TPACPI_HANDLE(led, ec, "SLED",  /* 570 */
4018            "SYSL",              /* 600e/x, 770e, 770x, A21e, A2xm/p, */
4019                                 /* T20-22, X20-21 */
4020            "LED",               /* all others */
4021            );                   /* R30, R31 */
4022
4023 #define TPACPI_LED_NUMLEDS 8
4024 static struct tpacpi_led_classdev *tpacpi_leds;
4025 static enum led_status_t tpacpi_led_state_cache[TPACPI_LED_NUMLEDS];
4026 static const char * const tpacpi_led_names[TPACPI_LED_NUMLEDS] = {
4027         /* there's a limit of 19 chars + NULL before 2.6.26 */
4028         "tpacpi::power",
4029         "tpacpi:orange:batt",
4030         "tpacpi:green:batt",
4031         "tpacpi::dock_active",
4032         "tpacpi::bay_active",
4033         "tpacpi::dock_batt",
4034         "tpacpi::unknown_led",
4035         "tpacpi::standby",
4036 };
4037
4038 static int led_get_status(const unsigned int led)
4039 {
4040         int status;
4041         enum led_status_t led_s;
4042
4043         switch (led_supported) {
4044         case TPACPI_LED_570:
4045                 if (!acpi_evalf(ec_handle,
4046                                 &status, "GLED", "dd", 1 << led))
4047                         return -EIO;
4048                 led_s = (status == 0)?
4049                                 TPACPI_LED_OFF :
4050                                 ((status == 1)?
4051                                         TPACPI_LED_ON :
4052                                         TPACPI_LED_BLINK);
4053                 tpacpi_led_state_cache[led] = led_s;
4054                 return led_s;
4055         default:
4056                 return -ENXIO;
4057         }
4058
4059         /* not reached */
4060 }
4061
4062 static int led_set_status(const unsigned int led,
4063                           const enum led_status_t ledstatus)
4064 {
4065         /* off, on, blink. Index is led_status_t */
4066         static const unsigned int led_sled_arg1[] = { 0, 1, 3 };
4067         static const unsigned int led_led_arg1[] = { 0, 0x80, 0xc0 };
4068
4069         int rc = 0;
4070
4071         switch (led_supported) {
4072         case TPACPI_LED_570:
4073                 /* 570 */
4074                 if (led > 7)
4075                         return -EINVAL;
4076                 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
4077                                 (1 << led), led_sled_arg1[ledstatus]))
4078                         rc = -EIO;
4079                 break;
4080         case TPACPI_LED_OLD:
4081                 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */
4082                 if (led > 7)
4083                         return -EINVAL;
4084                 rc = ec_write(TPACPI_LED_EC_HLMS, (1 << led));
4085                 if (rc >= 0)
4086                         rc = ec_write(TPACPI_LED_EC_HLBL,
4087                                       (ledstatus == TPACPI_LED_BLINK) << led);
4088                 if (rc >= 0)
4089                         rc = ec_write(TPACPI_LED_EC_HLCL,
4090                                       (ledstatus != TPACPI_LED_OFF) << led);
4091                 break;
4092         case TPACPI_LED_NEW:
4093                 /* all others */
4094                 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
4095                                 led, led_led_arg1[ledstatus]))
4096                         rc = -EIO;
4097                 break;
4098         default:
4099                 rc = -ENXIO;
4100         }
4101
4102         if (!rc)
4103                 tpacpi_led_state_cache[led] = ledstatus;
4104
4105         return rc;
4106 }
4107
4108 static void led_sysfs_set_status(unsigned int led,
4109                                  enum led_brightness brightness)
4110 {
4111         led_set_status(led,
4112                         (brightness == LED_OFF) ?
4113                         TPACPI_LED_OFF :
4114                         (tpacpi_led_state_cache[led] == TPACPI_LED_BLINK) ?
4115                                 TPACPI_LED_BLINK : TPACPI_LED_ON);
4116 }
4117
4118 static void led_set_status_worker(struct work_struct *work)
4119 {
4120         struct tpacpi_led_classdev *data =
4121                 container_of(work, struct tpacpi_led_classdev, work);
4122
4123         if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING))
4124                 led_sysfs_set_status(data->led, data->new_brightness);
4125 }
4126
4127 static void led_sysfs_set(struct led_classdev *led_cdev,
4128                         enum led_brightness brightness)
4129 {
4130         struct tpacpi_led_classdev *data = container_of(led_cdev,
4131                              struct tpacpi_led_classdev, led_classdev);
4132
4133         data->new_brightness = brightness;
4134         queue_work(tpacpi_wq, &data->work);
4135 }
4136
4137 static int led_sysfs_blink_set(struct led_classdev *led_cdev,
4138                         unsigned long *delay_on, unsigned long *delay_off)
4139 {
4140         struct tpacpi_led_classdev *data = container_of(led_cdev,
4141                              struct tpacpi_led_classdev, led_classdev);
4142
4143         /* Can we choose the flash rate? */
4144         if (*delay_on == 0 && *delay_off == 0) {
4145                 /* yes. set them to the hardware blink rate (1 Hz) */
4146                 *delay_on = 500; /* ms */
4147                 *delay_off = 500; /* ms */
4148         } else if ((*delay_on != 500) || (*delay_off != 500))
4149                 return -EINVAL;
4150
4151         data->new_brightness = TPACPI_LED_BLINK;
4152         queue_work(tpacpi_wq, &data->work);
4153
4154         return 0;
4155 }
4156
4157 static enum led_brightness led_sysfs_get(struct led_classdev *led_cdev)
4158 {
4159         int rc;
4160
4161         struct tpacpi_led_classdev *data = container_of(led_cdev,
4162                              struct tpacpi_led_classdev, led_classdev);
4163
4164         rc = led_get_status(data->led);
4165
4166         if (rc == TPACPI_LED_OFF || rc < 0)
4167                 rc = LED_OFF;   /* no error handling in led class :( */
4168         else
4169                 rc = LED_FULL;
4170
4171         return rc;
4172 }
4173
4174 static void led_exit(void)
4175 {
4176         unsigned int i;
4177
4178         for (i = 0; i < TPACPI_LED_NUMLEDS; i++) {
4179                 if (tpacpi_leds[i].led_classdev.name)
4180                         led_classdev_unregister(&tpacpi_leds[i].led_classdev);
4181         }
4182
4183         kfree(tpacpi_leds);
4184 }
4185
4186 static int __init led_init(struct ibm_init_struct *iibm)
4187 {
4188         unsigned int i;
4189         int rc;
4190
4191         vdbg_printk(TPACPI_DBG_INIT, "initializing LED subdriver\n");
4192
4193         TPACPI_ACPIHANDLE_INIT(led);
4194
4195         if (!led_handle)
4196                 /* led not supported on R30, R31 */
4197                 led_supported = TPACPI_LED_NONE;
4198         else if (strlencmp(led_path, "SLED") == 0)
4199                 /* 570 */
4200                 led_supported = TPACPI_LED_570;
4201         else if (strlencmp(led_path, "SYSL") == 0)
4202                 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
4203                 led_supported = TPACPI_LED_OLD;
4204         else
4205                 /* all others */
4206                 led_supported = TPACPI_LED_NEW;
4207
4208         vdbg_printk(TPACPI_DBG_INIT, "LED commands are %s, mode %d\n",
4209                 str_supported(led_supported), led_supported);
4210
4211         tpacpi_leds = kzalloc(sizeof(*tpacpi_leds) * TPACPI_LED_NUMLEDS,
4212                               GFP_KERNEL);
4213         if (!tpacpi_leds) {
4214                 printk(TPACPI_ERR "Out of memory for LED data\n");
4215                 return -ENOMEM;
4216         }
4217
4218         for (i = 0; i < TPACPI_LED_NUMLEDS; i++) {
4219                 tpacpi_leds[i].led = i;
4220
4221                 tpacpi_leds[i].led_classdev.brightness_set = &led_sysfs_set;
4222                 tpacpi_leds[i].led_classdev.blink_set = &led_sysfs_blink_set;
4223                 if (led_supported == TPACPI_LED_570)
4224                         tpacpi_leds[i].led_classdev.brightness_get =
4225                                                         &led_sysfs_get;
4226
4227                 tpacpi_leds[i].led_classdev.name = tpacpi_led_names[i];
4228
4229                 INIT_WORK(&tpacpi_leds[i].work, led_set_status_worker);
4230
4231                 rc = led_classdev_register(&tpacpi_pdev->dev,
4232                                            &tpacpi_leds[i].led_classdev);
4233                 if (rc < 0) {
4234                         tpacpi_leds[i].led_classdev.name = NULL;
4235                         led_exit();
4236                         return rc;
4237                 }
4238         }
4239
4240         return (led_supported != TPACPI_LED_NONE)? 0 : 1;
4241 }
4242
4243 #define str_led_status(s) \
4244         ((s) == TPACPI_LED_OFF ? "off" : \
4245                 ((s) == TPACPI_LED_ON ? "on" : "blinking"))
4246
4247 static int led_read(char *p)
4248 {
4249         int len = 0;
4250
4251         if (!led_supported) {
4252                 len += sprintf(p + len, "status:\t\tnot supported\n");
4253                 return len;
4254         }
4255         len += sprintf(p + len, "status:\t\tsupported\n");
4256
4257         if (led_supported == TPACPI_LED_570) {
4258                 /* 570 */
4259                 int i, status;
4260                 for (i = 0; i < 8; i++) {
4261                         status = led_get_status(i);
4262                         if (status < 0)
4263                                 return -EIO;
4264                         len += sprintf(p + len, "%d:\t\t%s\n",
4265                                        i, str_led_status(status));
4266                 }
4267         }
4268
4269         len += sprintf(p + len, "commands:\t"
4270                        "<led> on, <led> off, <led> blink (<led> is 0-7)\n");
4271
4272         return len;
4273 }
4274
4275 static int led_write(char *buf)
4276 {
4277         char *cmd;
4278         int led, rc;
4279         enum led_status_t s;
4280
4281         if (!led_supported)
4282                 return -ENODEV;
4283
4284         while ((cmd = next_cmd(&buf))) {
4285                 if (sscanf(cmd, "%d", &led) != 1 || led < 0 || led > 7)
4286                         return -EINVAL;
4287
4288                 if (strstr(cmd, "off")) {
4289                         s = TPACPI_LED_OFF;
4290                 } else if (strstr(cmd, "on")) {
4291                         s = TPACPI_LED_ON;
4292                 } else if (strstr(cmd, "blink")) {
4293                         s = TPACPI_LED_BLINK;
4294                 } else {
4295                         return -EINVAL;
4296                 }
4297
4298                 rc = led_set_status(led, s);
4299                 if (rc < 0)
4300                         return rc;
4301         }
4302
4303         return 0;
4304 }
4305
4306 static struct ibm_struct led_driver_data = {
4307         .name = "led",
4308         .read = led_read,
4309         .write = led_write,
4310         .exit = led_exit,
4311 };
4312
4313 /*************************************************************************
4314  * Beep subdriver
4315  */
4316
4317 TPACPI_HANDLE(beep, ec, "BEEP");        /* all except R30, R31 */
4318
4319 static int __init beep_init(struct ibm_init_struct *iibm)
4320 {
4321         vdbg_printk(TPACPI_DBG_INIT, "initializing beep subdriver\n");
4322
4323         TPACPI_ACPIHANDLE_INIT(beep);
4324
4325         vdbg_printk(TPACPI_DBG_INIT, "beep is %s\n",
4326                 str_supported(beep_handle != NULL));
4327
4328         return (beep_handle)? 0 : 1;
4329 }
4330
4331 static int beep_read(char *p)
4332 {
4333         int len = 0;
4334
4335         if (!beep_handle)
4336                 len += sprintf(p + len, "status:\t\tnot supported\n");
4337         else {
4338                 len += sprintf(p + len, "status:\t\tsupported\n");
4339                 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-17)\n");
4340         }
4341
4342         return len;
4343 }
4344
4345 static int beep_write(char *buf)
4346 {
4347         char *cmd;
4348         int beep_cmd;
4349
4350         if (!beep_handle)
4351                 return -ENODEV;
4352
4353         while ((cmd = next_cmd(&buf))) {
4354                 if (sscanf(cmd, "%u", &beep_cmd) == 1 &&
4355                     beep_cmd >= 0 && beep_cmd <= 17) {
4356                         /* beep_cmd set */
4357                 } else
4358                         return -EINVAL;
4359                 if (!acpi_evalf(beep_handle, NULL, NULL, "vdd", beep_cmd, 0))
4360                         return -EIO;
4361         }
4362
4363         return 0;
4364 }
4365
4366 static struct ibm_struct beep_driver_data = {
4367         .name = "beep",
4368         .read = beep_read,
4369         .write = beep_write,
4370 };
4371
4372 /*************************************************************************
4373  * Thermal subdriver
4374  */
4375
4376 enum thermal_access_mode {
4377         TPACPI_THERMAL_NONE = 0,        /* No thermal support */
4378         TPACPI_THERMAL_ACPI_TMP07,      /* Use ACPI TMP0-7 */
4379         TPACPI_THERMAL_ACPI_UPDT,       /* Use ACPI TMP0-7 with UPDT */
4380         TPACPI_THERMAL_TPEC_8,          /* Use ACPI EC regs, 8 sensors */
4381         TPACPI_THERMAL_TPEC_16,         /* Use ACPI EC regs, 16 sensors */
4382 };
4383
4384 enum { /* TPACPI_THERMAL_TPEC_* */
4385         TP_EC_THERMAL_TMP0 = 0x78,      /* ACPI EC regs TMP 0..7 */
4386         TP_EC_THERMAL_TMP8 = 0xC0,      /* ACPI EC regs TMP 8..15 */
4387         TP_EC_THERMAL_TMP_NA = -128,    /* ACPI EC sensor not available */
4388 };
4389
4390 #define TPACPI_MAX_THERMAL_SENSORS 16   /* Max thermal sensors supported */
4391 struct ibm_thermal_sensors_struct {
4392         s32 temp[TPACPI_MAX_THERMAL_SENSORS];
4393 };
4394
4395 static enum thermal_access_mode thermal_read_mode;
4396
4397 /* idx is zero-based */
4398 static int thermal_get_sensor(int idx, s32 *value)
4399 {
4400         int t;
4401         s8 tmp;
4402         char tmpi[5];
4403
4404         t = TP_EC_THERMAL_TMP0;
4405
4406         switch (thermal_read_mode) {
4407 #if TPACPI_MAX_THERMAL_SENSORS >= 16
4408         case TPACPI_THERMAL_TPEC_16:
4409                 if (idx >= 8 && idx <= 15) {
4410                         t = TP_EC_THERMAL_TMP8;
4411                         idx -= 8;
4412                 }
4413                 /* fallthrough */
4414 #endif
4415         case TPACPI_THERMAL_TPEC_8:
4416                 if (idx <= 7) {
4417                         if (!acpi_ec_read(t + idx, &tmp))
4418                                 return -EIO;
4419                         *value = tmp * 1000;
4420                         return 0;
4421                 }
4422                 break;
4423
4424         case TPACPI_THERMAL_ACPI_UPDT:
4425                 if (idx <= 7) {
4426                         snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
4427                         if (!acpi_evalf(ec_handle, NULL, "UPDT", "v"))
4428                                 return -EIO;
4429                         if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
4430                                 return -EIO;
4431                         *value = (t - 2732) * 100;
4432                         return 0;
4433                 }
4434                 break;
4435
4436         case TPACPI_THERMAL_ACPI_TMP07:
4437                 if (idx <= 7) {
4438                         snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
4439                         if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
4440                                 return -EIO;
4441                         if (t > 127 || t < -127)
4442                                 t = TP_EC_THERMAL_TMP_NA;
4443                         *value = t * 1000;
4444                         return 0;
4445                 }
4446                 break;
4447
4448         case TPACPI_THERMAL_NONE:
4449         default:
4450                 return -ENOSYS;
4451         }
4452
4453         return -EINVAL;
4454 }
4455
4456 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s)
4457 {
4458         int res, i;
4459         int n;
4460
4461         n = 8;
4462         i = 0;
4463
4464         if (!s)
4465                 return -EINVAL;
4466
4467         if (thermal_read_mode == TPACPI_THERMAL_TPEC_16)
4468                 n = 16;
4469
4470         for (i = 0 ; i < n; i++) {
4471                 res = thermal_get_sensor(i, &s->temp[i]);
4472                 if (res)
4473                         return res;
4474         }
4475
4476         return n;
4477 }
4478
4479 /* sysfs temp##_input -------------------------------------------------- */
4480
4481 static ssize_t thermal_temp_input_show(struct device *dev,
4482                            struct device_attribute *attr,
4483                            char *buf)
4484 {
4485         struct sensor_device_attribute *sensor_attr =
4486                                         to_sensor_dev_attr(attr);
4487         int idx = sensor_attr->index;
4488         s32 value;
4489         int res;
4490
4491         res = thermal_get_sensor(idx, &value);
4492         if (res)
4493                 return res;
4494         if (value == TP_EC_THERMAL_TMP_NA * 1000)
4495                 return -ENXIO;
4496
4497         return snprintf(buf, PAGE_SIZE, "%d\n", value);
4498 }
4499
4500 #define THERMAL_SENSOR_ATTR_TEMP(_idxA, _idxB) \
4501          SENSOR_ATTR(temp##_idxA##_input, S_IRUGO, \
4502                      thermal_temp_input_show, NULL, _idxB)
4503
4504 static struct sensor_device_attribute sensor_dev_attr_thermal_temp_input[] = {
4505         THERMAL_SENSOR_ATTR_TEMP(1, 0),
4506         THERMAL_SENSOR_ATTR_TEMP(2, 1),
4507         THERMAL_SENSOR_ATTR_TEMP(3, 2),
4508         THERMAL_SENSOR_ATTR_TEMP(4, 3),
4509         THERMAL_SENSOR_ATTR_TEMP(5, 4),
4510         THERMAL_SENSOR_ATTR_TEMP(6, 5),
4511         THERMAL_SENSOR_ATTR_TEMP(7, 6),
4512         THERMAL_SENSOR_ATTR_TEMP(8, 7),
4513         THERMAL_SENSOR_ATTR_TEMP(9, 8),
4514         THERMAL_SENSOR_ATTR_TEMP(10, 9),
4515         THERMAL_SENSOR_ATTR_TEMP(11, 10),
4516         THERMAL_SENSOR_ATTR_TEMP(12, 11),
4517         THERMAL_SENSOR_ATTR_TEMP(13, 12),
4518         THERMAL_SENSOR_ATTR_TEMP(14, 13),
4519         THERMAL_SENSOR_ATTR_TEMP(15, 14),
4520         THERMAL_SENSOR_ATTR_TEMP(16, 15),
4521 };
4522
4523 #define THERMAL_ATTRS(X) \
4524         &sensor_dev_attr_thermal_temp_input[X].dev_attr.attr
4525
4526 static struct attribute *thermal_temp_input_attr[] = {
4527         THERMAL_ATTRS(8),
4528         THERMAL_ATTRS(9),
4529         THERMAL_ATTRS(10),
4530         THERMAL_ATTRS(11),
4531         THERMAL_ATTRS(12),
4532         THERMAL_ATTRS(13),
4533         THERMAL_ATTRS(14),
4534         THERMAL_ATTRS(15),
4535         THERMAL_ATTRS(0),
4536         THERMAL_ATTRS(1),
4537         THERMAL_ATTRS(2),
4538         THERMAL_ATTRS(3),
4539         THERMAL_ATTRS(4),
4540         THERMAL_ATTRS(5),
4541         THERMAL_ATTRS(6),
4542         THERMAL_ATTRS(7),
4543         NULL
4544 };
4545
4546 static const struct attribute_group thermal_temp_input16_group = {
4547         .attrs = thermal_temp_input_attr
4548 };
4549
4550 static const struct attribute_group thermal_temp_input8_group = {
4551         .attrs = &thermal_temp_input_attr[8]
4552 };
4553
4554 #undef THERMAL_SENSOR_ATTR_TEMP
4555 #undef THERMAL_ATTRS
4556
4557 /* --------------------------------------------------------------------- */
4558
4559 static int __init thermal_init(struct ibm_init_struct *iibm)
4560 {
4561         u8 t, ta1, ta2;
4562         int i;
4563         int acpi_tmp7;
4564         int res;
4565
4566         vdbg_printk(TPACPI_DBG_INIT, "initializing thermal subdriver\n");
4567
4568         acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv");
4569
4570         if (thinkpad_id.ec_model) {
4571                 /*
4572                  * Direct EC access mode: sensors at registers
4573                  * 0x78-0x7F, 0xC0-0xC7.  Registers return 0x00 for
4574                  * non-implemented, thermal sensors return 0x80 when
4575                  * not available
4576                  */
4577
4578                 ta1 = ta2 = 0;
4579                 for (i = 0; i < 8; i++) {
4580                         if (acpi_ec_read(TP_EC_THERMAL_TMP0 + i, &t)) {
4581                                 ta1 |= t;
4582                         } else {
4583                                 ta1 = 0;
4584                                 break;
4585                         }
4586                         if (acpi_ec_read(TP_EC_THERMAL_TMP8 + i, &t)) {
4587                                 ta2 |= t;
4588                         } else {
4589                                 ta1 = 0;
4590                                 break;
4591                         }
4592                 }
4593                 if (ta1 == 0) {
4594                         /* This is sheer paranoia, but we handle it anyway */
4595                         if (acpi_tmp7) {
4596                                 printk(TPACPI_ERR
4597                                        "ThinkPad ACPI EC access misbehaving, "
4598                                        "falling back to ACPI TMPx access "
4599                                        "mode\n");
4600                                 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
4601                         } else {
4602                                 printk(TPACPI_ERR
4603                                        "ThinkPad ACPI EC access misbehaving, "
4604                                        "disabling thermal sensors access\n");
4605                                 thermal_read_mode = TPACPI_THERMAL_NONE;
4606                         }
4607                 } else {
4608                         thermal_read_mode =
4609                             (ta2 != 0) ?
4610                             TPACPI_THERMAL_TPEC_16 : TPACPI_THERMAL_TPEC_8;
4611                 }
4612         } else if (acpi_tmp7) {
4613                 if (acpi_evalf(ec_handle, NULL, "UPDT", "qv")) {
4614                         /* 600e/x, 770e, 770x */
4615                         thermal_read_mode = TPACPI_THERMAL_ACPI_UPDT;
4616                 } else {
4617                         /* Standard ACPI TMPx access, max 8 sensors */
4618                         thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
4619                 }
4620         } else {
4621                 /* temperatures not supported on 570, G4x, R30, R31, R32 */
4622                 thermal_read_mode = TPACPI_THERMAL_NONE;
4623         }
4624
4625         vdbg_printk(TPACPI_DBG_INIT, "thermal is %s, mode %d\n",
4626                 str_supported(thermal_read_mode != TPACPI_THERMAL_NONE),
4627                 thermal_read_mode);
4628
4629         switch (thermal_read_mode) {
4630         case TPACPI_THERMAL_TPEC_16:
4631                 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
4632                                 &thermal_temp_input16_group);
4633                 if (res)
4634                         return res;
4635                 break;
4636         case TPACPI_THERMAL_TPEC_8:
4637         case TPACPI_THERMAL_ACPI_TMP07:
4638         case TPACPI_THERMAL_ACPI_UPDT:
4639                 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
4640                                 &thermal_temp_input8_group);
4641                 if (res)
4642                         return res;
4643                 break;
4644         case TPACPI_THERMAL_NONE:
4645         default:
4646                 return 1;
4647         }
4648
4649         return 0;
4650 }
4651
4652 static void thermal_exit(void)
4653 {
4654         switch (thermal_read_mode) {
4655         case TPACPI_THERMAL_TPEC_16:
4656                 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
4657                                    &thermal_temp_input16_group);
4658                 break;
4659         case TPACPI_THERMAL_TPEC_8:
4660         case TPACPI_THERMAL_ACPI_TMP07:
4661         case TPACPI_THERMAL_ACPI_UPDT:
4662                 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
4663                                    &thermal_temp_input16_group);
4664                 break;
4665         case TPACPI_THERMAL_NONE:
4666         default:
4667                 break;
4668         }
4669 }
4670
4671 static int thermal_read(char *p)
4672 {
4673         int len = 0;
4674         int n, i;
4675         struct ibm_thermal_sensors_struct t;
4676
4677         n = thermal_get_sensors(&t);
4678         if (unlikely(n < 0))
4679                 return n;
4680
4681         len += sprintf(p + len, "temperatures:\t");
4682
4683         if (n > 0) {
4684                 for (i = 0; i < (n - 1); i++)
4685                         len += sprintf(p + len, "%d ", t.temp[i] / 1000);
4686                 len += sprintf(p + len, "%d\n", t.temp[i] / 1000);
4687         } else
4688                 len += sprintf(p + len, "not supported\n");
4689
4690         return len;
4691 }
4692
4693 static struct ibm_struct thermal_driver_data = {
4694         .name = "thermal",
4695         .read = thermal_read,
4696         .exit = thermal_exit,
4697 };
4698
4699 /*************************************************************************
4700  * EC Dump subdriver
4701  */
4702
4703 static u8 ecdump_regs[256];
4704
4705 static int ecdump_read(char *p)
4706 {
4707         int len = 0;
4708         int i, j;
4709         u8 v;
4710
4711         len += sprintf(p + len, "EC      "
4712                        " +00 +01 +02 +03 +04 +05 +06 +07"
4713                        " +08 +09 +0a +0b +0c +0d +0e +0f\n");
4714         for (i = 0; i < 256; i += 16) {
4715                 len += sprintf(p + len, "EC 0x%02x:", i);
4716                 for (j = 0; j < 16; j++) {
4717                         if (!acpi_ec_read(i + j, &v))
4718                                 break;
4719                         if (v != ecdump_regs[i + j])
4720                                 len += sprintf(p + len, " *%02x", v);
4721                         else
4722                                 len += sprintf(p + len, "  %02x", v);
4723                         ecdump_regs[i + j] = v;
4724                 }
4725                 len += sprintf(p + len, "\n");
4726                 if (j != 16)
4727                         break;
4728         }
4729
4730         /* These are way too dangerous to advertise openly... */
4731 #if 0
4732         len += sprintf(p + len, "commands:\t0x<offset> 0x<value>"
4733                        " (<offset> is 00-ff, <value> is 00-ff)\n");
4734         len += sprintf(p + len, "commands:\t0x<offset> <value>  "
4735                        " (<offset> is 00-ff, <value> is 0-255)\n");
4736 #endif
4737         return len;
4738 }
4739
4740 static int ecdump_write(char *buf)
4741 {
4742         char *cmd;
4743         int i, v;
4744
4745         while ((cmd = next_cmd(&buf))) {
4746                 if (sscanf(cmd, "0x%x 0x%x", &i, &v) == 2) {
4747                         /* i and v set */
4748                 } else if (sscanf(cmd, "0x%x %u", &i, &v) == 2) {
4749                         /* i and v set */
4750                 } else
4751                         return -EINVAL;
4752                 if (i >= 0 && i < 256 && v >= 0 && v < 256) {
4753                         if (!acpi_ec_write(i, v))
4754                                 return -EIO;
4755                 } else
4756                         return -EINVAL;
4757         }
4758
4759         return 0;
4760 }
4761
4762 static struct ibm_struct ecdump_driver_data = {
4763         .name = "ecdump",
4764         .read = ecdump_read,
4765         .write = ecdump_write,
4766         .flags.experimental = 1,
4767 };
4768
4769 /*************************************************************************
4770  * Backlight/brightness subdriver
4771  */
4772
4773 #define TPACPI_BACKLIGHT_DEV_NAME "thinkpad_screen"
4774
4775 enum {
4776         TP_EC_BACKLIGHT = 0x31,
4777
4778         /* TP_EC_BACKLIGHT bitmasks */
4779         TP_EC_BACKLIGHT_LVLMSK = 0x1F,
4780         TP_EC_BACKLIGHT_CMDMSK = 0xE0,
4781         TP_EC_BACKLIGHT_MAPSW = 0x20,
4782 };
4783
4784 static struct backlight_device *ibm_backlight_device;
4785 static int brightness_mode;
4786 static unsigned int brightness_enable = 2; /* 2 = auto, 0 = no, 1 = yes */
4787
4788 static struct mutex brightness_mutex;
4789
4790 /*
4791  * ThinkPads can read brightness from two places: EC 0x31, or
4792  * CMOS NVRAM byte 0x5E, bits 0-3.
4793  *
4794  * EC 0x31 has the following layout
4795  *   Bit 7: unknown function
4796  *   Bit 6: unknown function
4797  *   Bit 5: Z: honour scale changes, NZ: ignore scale changes
4798  *   Bit 4: must be set to zero to avoid problems
4799  *   Bit 3-0: backlight brightness level
4800  *
4801  * brightness_get_raw returns status data in the EC 0x31 layout
4802  */
4803 static int brightness_get_raw(int *status)
4804 {
4805         u8 lec = 0, lcmos = 0, level = 0;
4806
4807         if (brightness_mode & 1) {
4808                 if (!acpi_ec_read(TP_EC_BACKLIGHT, &lec))
4809                         return -EIO;
4810                 level = lec & TP_EC_BACKLIGHT_LVLMSK;
4811         };
4812         if (brightness_mode & 2) {
4813                 lcmos = (nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS)
4814                          & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
4815                         >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
4816                 lcmos &= (tp_features.bright_16levels)? 0x0f : 0x07;
4817                 level = lcmos;
4818         }
4819
4820         if (brightness_mode == 3) {
4821                 *status = lec;  /* Prefer EC, CMOS is just a backing store */
4822                 lec &= TP_EC_BACKLIGHT_LVLMSK;
4823                 if (lec == lcmos)
4824                         tp_warned.bright_cmos_ec_unsync = 0;
4825                 else {
4826                         if (!tp_warned.bright_cmos_ec_unsync) {
4827                                 printk(TPACPI_ERR
4828                                         "CMOS NVRAM (%u) and EC (%u) do not "
4829                                         "agree on display brightness level\n",
4830                                         (unsigned int) lcmos,
4831                                         (unsigned int) lec);
4832                                 tp_warned.bright_cmos_ec_unsync = 1;
4833                         }
4834                         return -EIO;
4835                 }
4836         } else {
4837                 *status = level;
4838         }
4839
4840         return 0;
4841 }
4842
4843 /* May return EINTR which can always be mapped to ERESTARTSYS */
4844 static int brightness_set(int value)
4845 {
4846         int cmos_cmd, inc, i, res;
4847         int current_value;
4848         int command_bits;
4849
4850         if (value > ((tp_features.bright_16levels)? 15 : 7) ||
4851             value < 0)
4852                 return -EINVAL;
4853
4854         res = mutex_lock_interruptible(&brightness_mutex);
4855         if (res < 0)
4856                 return res;
4857
4858         res = brightness_get_raw(&current_value);
4859         if (res < 0)
4860                 goto errout;
4861
4862         command_bits = current_value & TP_EC_BACKLIGHT_CMDMSK;
4863         current_value &= TP_EC_BACKLIGHT_LVLMSK;
4864
4865         cmos_cmd = value > current_value ?
4866                         TP_CMOS_BRIGHTNESS_UP :
4867                         TP_CMOS_BRIGHTNESS_DOWN;
4868         inc = (value > current_value)? 1 : -1;
4869
4870         res = 0;
4871         for (i = current_value; i != value; i += inc) {
4872                 if ((brightness_mode & 2) &&
4873                     issue_thinkpad_cmos_command(cmos_cmd)) {
4874                         res = -EIO;
4875                         goto errout;
4876                 }
4877                 if ((brightness_mode & 1) &&
4878                     !acpi_ec_write(TP_EC_BACKLIGHT,
4879                                    (i + inc) | command_bits)) {
4880                         res = -EIO;
4881                         goto errout;;
4882                 }
4883         }
4884
4885 errout:
4886         mutex_unlock(&brightness_mutex);
4887         return res;
4888 }
4889
4890 /* sysfs backlight class ----------------------------------------------- */
4891
4892 static int brightness_update_status(struct backlight_device *bd)
4893 {
4894         /* it is the backlight class's job (caller) to handle
4895          * EINTR and other errors properly */
4896         return brightness_set(
4897                 (bd->props.fb_blank == FB_BLANK_UNBLANK &&
4898                  bd->props.power == FB_BLANK_UNBLANK) ?
4899                                 bd->props.brightness : 0);
4900 }
4901
4902 static int brightness_get(struct backlight_device *bd)
4903 {
4904         int status, res;
4905
4906         res = brightness_get_raw(&status);
4907         if (res < 0)
4908                 return 0; /* FIXME: teach backlight about error handling */
4909
4910         return status & TP_EC_BACKLIGHT_LVLMSK;
4911 }
4912
4913 static struct backlight_ops ibm_backlight_data = {
4914         .get_brightness = brightness_get,
4915         .update_status  = brightness_update_status,
4916 };
4917
4918 /* --------------------------------------------------------------------- */
4919
4920 static int __init brightness_init(struct ibm_init_struct *iibm)
4921 {
4922         int b;
4923
4924         vdbg_printk(TPACPI_DBG_INIT, "initializing brightness subdriver\n");
4925
4926         mutex_init(&brightness_mutex);
4927
4928         /*
4929          * We always attempt to detect acpi support, so as to switch
4930          * Lenovo Vista BIOS to ACPI brightness mode even if we are not
4931          * going to publish a backlight interface
4932          */
4933         b = tpacpi_check_std_acpi_brightness_support();
4934         if (b > 0) {
4935
4936                 if (acpi_video_backlight_support()) {
4937                         if (brightness_enable > 1) {
4938                                 printk(TPACPI_NOTICE
4939                                        "Standard ACPI backlight interface "
4940                                        "available, not loading native one.\n");
4941                                 return 1;
4942                         } else if (brightness_enable == 1) {
4943                                 printk(TPACPI_NOTICE
4944                                        "Backlight control force enabled, even if standard "
4945                                        "ACPI backlight interface is available\n");
4946                         }
4947                 } else {
4948                         if (brightness_enable > 1) {
4949                                 printk(TPACPI_NOTICE
4950                                        "Standard ACPI backlight interface not "
4951                                        "available, thinkpad_acpi native "
4952                                        "brightness control enabled\n");
4953                         }
4954                 }
4955         }
4956
4957         if (!brightness_enable) {
4958                 dbg_printk(TPACPI_DBG_INIT,
4959                            "brightness support disabled by "
4960                            "module parameter\n");
4961                 return 1;
4962         }
4963
4964         if (b > 16) {
4965                 printk(TPACPI_ERR
4966                        "Unsupported brightness interface, "
4967                        "please contact %s\n", TPACPI_MAIL);
4968                 return 1;
4969         }
4970         if (b == 16)
4971                 tp_features.bright_16levels = 1;
4972
4973         if (!brightness_mode) {
4974                 if (thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO)
4975                         brightness_mode = 2;
4976                 else
4977                         brightness_mode = 3;
4978
4979                 dbg_printk(TPACPI_DBG_INIT, "selected brightness_mode=%d\n",
4980                         brightness_mode);
4981         }
4982
4983         if (brightness_mode > 3)
4984                 return -EINVAL;
4985
4986         if (brightness_get_raw(&b) < 0)
4987                 return 1;
4988
4989         if (tp_features.bright_16levels)
4990                 printk(TPACPI_INFO
4991                        "detected a 16-level brightness capable ThinkPad\n");
4992
4993         ibm_backlight_device = backlight_device_register(
4994                                         TPACPI_BACKLIGHT_DEV_NAME, NULL, NULL,
4995                                         &ibm_backlight_data);
4996         if (IS_ERR(ibm_backlight_device)) {
4997                 printk(TPACPI_ERR "Could not register backlight device\n");
4998                 return PTR_ERR(ibm_backlight_device);
4999         }
5000         vdbg_printk(TPACPI_DBG_INIT, "brightness is supported\n");
5001
5002         ibm_backlight_device->props.max_brightness =
5003                                 (tp_features.bright_16levels)? 15 : 7;
5004         ibm_backlight_device->props.brightness = b & TP_EC_BACKLIGHT_LVLMSK;
5005         backlight_update_status(ibm_backlight_device);
5006
5007         return 0;
5008 }
5009
5010 static void brightness_exit(void)
5011 {
5012         if (ibm_backlight_device) {
5013                 vdbg_printk(TPACPI_DBG_EXIT,
5014                             "calling backlight_device_unregister()\n");
5015                 backlight_device_unregister(ibm_backlight_device);
5016         }
5017 }
5018
5019 static int brightness_read(char *p)
5020 {
5021         int len = 0;
5022         int level;
5023
5024         level = brightness_get(NULL);
5025         if (level < 0) {
5026                 len += sprintf(p + len, "level:\t\tunreadable\n");
5027         } else {
5028                 len += sprintf(p + len, "level:\t\t%d\n", level);
5029                 len += sprintf(p + len, "commands:\tup, down\n");
5030                 len += sprintf(p + len, "commands:\tlevel <level>"
5031                                " (<level> is 0-%d)\n",
5032                                (tp_features.bright_16levels) ? 15 : 7);
5033         }
5034
5035         return len;
5036 }
5037
5038 static int brightness_write(char *buf)
5039 {
5040         int level;
5041         int rc;
5042         char *cmd;
5043         int max_level = (tp_features.bright_16levels) ? 15 : 7;
5044
5045         level = brightness_get(NULL);
5046         if (level < 0)
5047                 return level;
5048
5049         while ((cmd = next_cmd(&buf))) {
5050                 if (strlencmp(cmd, "up") == 0) {
5051                         if (level < max_level)
5052                                 level++;
5053                 } else if (strlencmp(cmd, "down") == 0) {
5054                         if (level > 0)
5055                                 level--;
5056                 } else if (sscanf(cmd, "level %d", &level) == 1 &&
5057                            level >= 0 && level <= max_level) {
5058                         /* new level set */
5059                 } else
5060                         return -EINVAL;
5061         }
5062
5063         /*
5064          * Now we know what the final level should be, so we try to set it.
5065          * Doing it this way makes the syscall restartable in case of EINTR
5066          */
5067         rc = brightness_set(level);
5068         return (rc == -EINTR)? ERESTARTSYS : rc;
5069 }
5070
5071 static struct ibm_struct brightness_driver_data = {
5072         .name = "brightness",
5073         .read = brightness_read,
5074         .write = brightness_write,
5075         .exit = brightness_exit,
5076 };
5077
5078 /*************************************************************************
5079  * Volume subdriver
5080  */
5081
5082 static int volume_offset = 0x30;
5083
5084 static int volume_read(char *p)
5085 {
5086         int len = 0;
5087         u8 level;
5088
5089         if (!acpi_ec_read(volume_offset, &level)) {
5090                 len += sprintf(p + len, "level:\t\tunreadable\n");
5091         } else {
5092                 len += sprintf(p + len, "level:\t\t%d\n", level & 0xf);
5093                 len += sprintf(p + len, "mute:\t\t%s\n", onoff(level, 6));
5094                 len += sprintf(p + len, "commands:\tup, down, mute\n");
5095                 len += sprintf(p + len, "commands:\tlevel <level>"
5096                                " (<level> is 0-15)\n");
5097         }
5098
5099         return len;
5100 }
5101
5102 static int volume_write(char *buf)
5103 {
5104         int cmos_cmd, inc, i;
5105         u8 level, mute;
5106         int new_level, new_mute;
5107         char *cmd;
5108
5109         while ((cmd = next_cmd(&buf))) {
5110                 if (!acpi_ec_read(volume_offset, &level))
5111                         return -EIO;
5112                 new_mute = mute = level & 0x40;
5113                 new_level = level = level & 0xf;
5114
5115                 if (strlencmp(cmd, "up") == 0) {
5116                         if (mute)
5117                                 new_mute = 0;
5118                         else
5119                                 new_level = level == 15 ? 15 : level + 1;
5120                 } else if (strlencmp(cmd, "down") == 0) {
5121                         if (mute)
5122                                 new_mute = 0;
5123                         else
5124                                 new_level = level == 0 ? 0 : level - 1;
5125                 } else if (sscanf(cmd, "level %d", &new_level) == 1 &&
5126                            new_level >= 0 && new_level <= 15) {
5127                         /* new_level set */
5128                 } else if (strlencmp(cmd, "mute") == 0) {
5129                         new_mute = 0x40;
5130                 } else
5131                         return -EINVAL;
5132
5133                 if (new_level != level) {
5134                         /* mute doesn't change */
5135
5136                         cmos_cmd = (new_level > level) ?
5137                                         TP_CMOS_VOLUME_UP : TP_CMOS_VOLUME_DOWN;
5138                         inc = new_level > level ? 1 : -1;
5139
5140                         if (mute && (issue_thinkpad_cmos_command(cmos_cmd) ||
5141                                      !acpi_ec_write(volume_offset, level)))
5142                                 return -EIO;
5143
5144                         for (i = level; i != new_level; i += inc)
5145                                 if (issue_thinkpad_cmos_command(cmos_cmd) ||
5146                                     !acpi_ec_write(volume_offset, i + inc))
5147                                         return -EIO;
5148
5149                         if (mute &&
5150                             (issue_thinkpad_cmos_command(TP_CMOS_VOLUME_MUTE) ||
5151                              !acpi_ec_write(volume_offset, new_level + mute))) {
5152                                 return -EIO;
5153                         }
5154                 }
5155
5156                 if (new_mute != mute) {
5157                         /* level doesn't change */
5158
5159                         cmos_cmd = (new_mute) ?
5160                                    TP_CMOS_VOLUME_MUTE : TP_CMOS_VOLUME_UP;
5161
5162                         if (issue_thinkpad_cmos_command(cmos_cmd) ||
5163                             !acpi_ec_write(volume_offset, level + new_mute))
5164                                 return -EIO;
5165                 }
5166         }
5167
5168         return 0;
5169 }
5170
5171 static struct ibm_struct volume_driver_data = {
5172         .name = "volume",
5173         .read = volume_read,
5174         .write = volume_write,
5175 };
5176
5177 /*************************************************************************
5178  * Fan subdriver
5179  */
5180
5181 /*
5182  * FAN ACCESS MODES
5183  *
5184  * TPACPI_FAN_RD_ACPI_GFAN:
5185  *      ACPI GFAN method: returns fan level
5186  *
5187  *      see TPACPI_FAN_WR_ACPI_SFAN
5188  *      EC 0x2f (HFSP) not available if GFAN exists
5189  *
5190  * TPACPI_FAN_WR_ACPI_SFAN:
5191  *      ACPI SFAN method: sets fan level, 0 (stop) to 7 (max)
5192  *
5193  *      EC 0x2f (HFSP) might be available *for reading*, but do not use
5194  *      it for writing.
5195  *
5196  * TPACPI_FAN_WR_TPEC:
5197  *      ThinkPad EC register 0x2f (HFSP): fan control loop mode
5198  *      Supported on almost all ThinkPads
5199  *
5200  *      Fan speed changes of any sort (including those caused by the
5201  *      disengaged mode) are usually done slowly by the firmware as the
5202  *      maximum ammount of fan duty cycle change per second seems to be
5203  *      limited.
5204  *
5205  *      Reading is not available if GFAN exists.
5206  *      Writing is not available if SFAN exists.
5207  *
5208  *      Bits
5209  *       7      automatic mode engaged;
5210  *              (default operation mode of the ThinkPad)
5211  *              fan level is ignored in this mode.
5212  *       6      full speed mode (takes precedence over bit 7);
5213  *              not available on all thinkpads.  May disable
5214  *              the tachometer while the fan controller ramps up
5215  *              the speed (which can take up to a few *minutes*).
5216  *              Speeds up fan to 100% duty-cycle, which is far above
5217  *              the standard RPM levels.  It is not impossible that
5218  *              it could cause hardware damage.
5219  *      5-3     unused in some models.  Extra bits for fan level
5220  *              in others, but still useless as all values above
5221  *              7 map to the same speed as level 7 in these models.
5222  *      2-0     fan level (0..7 usually)
5223  *                      0x00 = stop
5224  *                      0x07 = max (set when temperatures critical)
5225  *              Some ThinkPads may have other levels, see
5226  *              TPACPI_FAN_WR_ACPI_FANS (X31/X40/X41)
5227  *
5228  *      FIRMWARE BUG: on some models, EC 0x2f might not be initialized at
5229  *      boot. Apparently the EC does not intialize it, so unless ACPI DSDT
5230  *      does so, its initial value is meaningless (0x07).
5231  *
5232  *      For firmware bugs, refer to:
5233  *      http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
5234  *
5235  *      ----
5236  *
5237  *      ThinkPad EC register 0x84 (LSB), 0x85 (MSB):
5238  *      Main fan tachometer reading (in RPM)
5239  *
5240  *      This register is present on all ThinkPads with a new-style EC, and
5241  *      it is known not to be present on the A21m/e, and T22, as there is
5242  *      something else in offset 0x84 according to the ACPI DSDT.  Other
5243  *      ThinkPads from this same time period (and earlier) probably lack the
5244  *      tachometer as well.
5245  *
5246  *      Unfortunately a lot of ThinkPads with new-style ECs but whose firwmare
5247  *      was never fixed by IBM to report the EC firmware version string
5248  *      probably support the tachometer (like the early X models), so
5249  *      detecting it is quite hard.  We need more data to know for sure.
5250  *
5251  *      FIRMWARE BUG: always read 0x84 first, otherwise incorrect readings
5252  *      might result.
5253  *
5254  *      FIRMWARE BUG: may go stale while the EC is switching to full speed
5255  *      mode.
5256  *
5257  *      For firmware bugs, refer to:
5258  *      http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
5259  *
5260  * TPACPI_FAN_WR_ACPI_FANS:
5261  *      ThinkPad X31, X40, X41.  Not available in the X60.
5262  *
5263  *      FANS ACPI handle: takes three arguments: low speed, medium speed,
5264  *      high speed.  ACPI DSDT seems to map these three speeds to levels
5265  *      as follows: STOP LOW LOW MED MED HIGH HIGH HIGH HIGH
5266  *      (this map is stored on FAN0..FAN8 as "0,1,1,2,2,3,3,3,3")
5267  *
5268  *      The speeds are stored on handles
5269  *      (FANA:FAN9), (FANC:FANB), (FANE:FAND).
5270  *
5271  *      There are three default speed sets, acessible as handles:
5272  *      FS1L,FS1M,FS1H; FS2L,FS2M,FS2H; FS3L,FS3M,FS3H
5273  *
5274  *      ACPI DSDT switches which set is in use depending on various
5275  *      factors.
5276  *
5277  *      TPACPI_FAN_WR_TPEC is also available and should be used to
5278  *      command the fan.  The X31/X40/X41 seems to have 8 fan levels,
5279  *      but the ACPI tables just mention level 7.
5280  */
5281
5282 enum {                                  /* Fan control constants */
5283         fan_status_offset = 0x2f,       /* EC register 0x2f */
5284         fan_rpm_offset = 0x84,          /* EC register 0x84: LSB, 0x85 MSB (RPM)
5285                                          * 0x84 must be read before 0x85 */
5286
5287         TP_EC_FAN_FULLSPEED = 0x40,     /* EC fan mode: full speed */
5288         TP_EC_FAN_AUTO      = 0x80,     /* EC fan mode: auto fan control */
5289
5290         TPACPI_FAN_LAST_LEVEL = 0x100,  /* Use cached last-seen fan level */
5291 };
5292
5293 enum fan_status_access_mode {
5294         TPACPI_FAN_NONE = 0,            /* No fan status or control */
5295         TPACPI_FAN_RD_ACPI_GFAN,        /* Use ACPI GFAN */
5296         TPACPI_FAN_RD_TPEC,             /* Use ACPI EC regs 0x2f, 0x84-0x85 */
5297 };
5298
5299 enum fan_control_access_mode {
5300         TPACPI_FAN_WR_NONE = 0,         /* No fan control */
5301         TPACPI_FAN_WR_ACPI_SFAN,        /* Use ACPI SFAN */
5302         TPACPI_FAN_WR_TPEC,             /* Use ACPI EC reg 0x2f */
5303         TPACPI_FAN_WR_ACPI_FANS,        /* Use ACPI FANS and EC reg 0x2f */
5304 };
5305
5306 enum fan_control_commands {
5307         TPACPI_FAN_CMD_SPEED    = 0x0001,       /* speed command */
5308         TPACPI_FAN_CMD_LEVEL    = 0x0002,       /* level command  */
5309         TPACPI_FAN_CMD_ENABLE   = 0x0004,       /* enable/disable cmd,
5310                                                  * and also watchdog cmd */
5311 };
5312
5313 static int fan_control_allowed;
5314
5315 static enum fan_status_access_mode fan_status_access_mode;
5316 static enum fan_control_access_mode fan_control_access_mode;
5317 static enum fan_control_commands fan_control_commands;
5318
5319 static u8 fan_control_initial_status;
5320 static u8 fan_control_desired_level;
5321 static u8 fan_control_resume_level;
5322 static int fan_watchdog_maxinterval;
5323
5324 static struct mutex fan_mutex;
5325
5326 static void fan_watchdog_fire(struct work_struct *ignored);
5327 static DECLARE_DELAYED_WORK(fan_watchdog_task, fan_watchdog_fire);
5328
5329 TPACPI_HANDLE(fans, ec, "FANS");        /* X31, X40, X41 */
5330 TPACPI_HANDLE(gfan, ec, "GFAN", /* 570 */
5331            "\\FSPD",            /* 600e/x, 770e, 770x */
5332            );                   /* all others */
5333 TPACPI_HANDLE(sfan, ec, "SFAN", /* 570 */
5334            "JFNS",              /* 770x-JL */
5335            );                   /* all others */
5336
5337 /*
5338  * Call with fan_mutex held
5339  */
5340 static void fan_update_desired_level(u8 status)
5341 {
5342         if ((status &
5343              (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
5344                 if (status > 7)
5345                         fan_control_desired_level = 7;
5346                 else
5347                         fan_control_desired_level = status;
5348         }
5349 }
5350
5351 static int fan_get_status(u8 *status)
5352 {
5353         u8 s;
5354
5355         /* TODO:
5356          * Add TPACPI_FAN_RD_ACPI_FANS ? */
5357
5358         switch (fan_status_access_mode) {
5359         case TPACPI_FAN_RD_ACPI_GFAN:
5360                 /* 570, 600e/x, 770e, 770x */
5361
5362                 if (unlikely(!acpi_evalf(gfan_handle, &s, NULL, "d")))
5363                         return -EIO;
5364
5365                 if (likely(status))
5366                         *status = s & 0x07;
5367
5368                 break;
5369
5370         case TPACPI_FAN_RD_TPEC:
5371                 /* all except 570, 600e/x, 770e, 770x */
5372                 if (unlikely(!acpi_ec_read(fan_status_offset, &s)))
5373                         return -EIO;
5374
5375                 if (likely(status))
5376                         *status = s;
5377
5378                 break;
5379
5380         default:
5381                 return -ENXIO;
5382         }
5383
5384         return 0;
5385 }
5386
5387 static int fan_get_status_safe(u8 *status)
5388 {
5389         int rc;
5390         u8 s;
5391
5392         if (mutex_lock_interruptible(&fan_mutex))
5393                 return -ERESTARTSYS;
5394         rc = fan_get_status(&s);
5395         if (!rc)
5396                 fan_update_desired_level(s);
5397         mutex_unlock(&fan_mutex);
5398
5399         if (status)
5400                 *status = s;
5401
5402         return rc;
5403 }
5404
5405 static int fan_get_speed(unsigned int *speed)
5406 {
5407         u8 hi, lo;
5408
5409         switch (fan_status_access_mode) {
5410         case TPACPI_FAN_RD_TPEC:
5411                 /* all except 570, 600e/x, 770e, 770x */
5412                 if (unlikely(!acpi_ec_read(fan_rpm_offset, &lo) ||
5413                              !acpi_ec_read(fan_rpm_offset + 1, &hi)))
5414                         return -EIO;
5415
5416                 if (likely(speed))
5417                         *speed = (hi << 8) | lo;
5418
5419                 break;
5420
5421         default:
5422                 return -ENXIO;
5423         }
5424
5425         return 0;
5426 }
5427
5428 static int fan_set_level(int level)
5429 {
5430         if (!fan_control_allowed)
5431                 return -EPERM;
5432
5433         switch (fan_control_access_mode) {
5434         case TPACPI_FAN_WR_ACPI_SFAN:
5435                 if (level >= 0 && level <= 7) {
5436                         if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level))
5437                                 return -EIO;
5438                 } else
5439                         return -EINVAL;
5440                 break;
5441
5442         case TPACPI_FAN_WR_ACPI_FANS:
5443         case TPACPI_FAN_WR_TPEC:
5444                 if (!(level & TP_EC_FAN_AUTO) &&
5445                     !(level & TP_EC_FAN_FULLSPEED) &&
5446                     ((level < 0) || (level > 7)))
5447                         return -EINVAL;
5448
5449                 /* safety net should the EC not support AUTO
5450                  * or FULLSPEED mode bits and just ignore them */
5451                 if (level & TP_EC_FAN_FULLSPEED)
5452                         level |= 7;     /* safety min speed 7 */
5453                 else if (level & TP_EC_FAN_AUTO)
5454                         level |= 4;     /* safety min speed 4 */
5455
5456                 if (!acpi_ec_write(fan_status_offset, level))
5457                         return -EIO;
5458                 else
5459                         tp_features.fan_ctrl_status_undef = 0;
5460                 break;
5461
5462         default:
5463                 return -ENXIO;
5464         }
5465         return 0;
5466 }
5467
5468 static int fan_set_level_safe(int level)
5469 {
5470         int rc;
5471
5472         if (!fan_control_allowed)
5473                 return -EPERM;
5474
5475         if (mutex_lock_interruptible(&fan_mutex))
5476                 return -ERESTARTSYS;
5477
5478         if (level == TPACPI_FAN_LAST_LEVEL)
5479                 level = fan_control_desired_level;
5480
5481         rc = fan_set_level(level);
5482         if (!rc)
5483                 fan_update_desired_level(level);
5484
5485         mutex_unlock(&fan_mutex);
5486         return rc;
5487 }
5488
5489 static int fan_set_enable(void)
5490 {
5491         u8 s;
5492         int rc;
5493
5494         if (!fan_control_allowed)
5495                 return -EPERM;
5496
5497         if (mutex_lock_interruptible(&fan_mutex))
5498                 return -ERESTARTSYS;
5499
5500         switch (fan_control_access_mode) {
5501         case TPACPI_FAN_WR_ACPI_FANS:
5502         case TPACPI_FAN_WR_TPEC:
5503                 rc = fan_get_status(&s);
5504                 if (rc < 0)
5505                         break;
5506
5507                 /* Don't go out of emergency fan mode */
5508                 if (s != 7) {
5509                         s &= 0x07;
5510                         s |= TP_EC_FAN_AUTO | 4; /* min fan speed 4 */
5511                 }
5512
5513                 if (!acpi_ec_write(fan_status_offset, s))
5514                         rc = -EIO;
5515                 else {
5516                         tp_features.fan_ctrl_status_undef = 0;
5517                         rc = 0;
5518                 }
5519                 break;
5520
5521         case TPACPI_FAN_WR_ACPI_SFAN:
5522                 rc = fan_get_status(&s);
5523                 if (rc < 0)
5524                         break;
5525
5526                 s &= 0x07;
5527
5528                 /* Set fan to at least level 4 */
5529                 s |= 4;
5530
5531                 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", s))
5532                         rc = -EIO;
5533                 else
5534                         rc = 0;
5535                 break;
5536
5537         default:
5538                 rc = -ENXIO;
5539         }
5540
5541         mutex_unlock(&fan_mutex);
5542         return rc;
5543 }
5544
5545 static int fan_set_disable(void)
5546 {
5547         int rc;
5548
5549         if (!fan_control_allowed)
5550                 return -EPERM;
5551
5552         if (mutex_lock_interruptible(&fan_mutex))
5553                 return -ERESTARTSYS;
5554
5555         rc = 0;
5556         switch (fan_control_access_mode) {
5557         case TPACPI_FAN_WR_ACPI_FANS:
5558         case TPACPI_FAN_WR_TPEC:
5559                 if (!acpi_ec_write(fan_status_offset, 0x00))
5560                         rc = -EIO;
5561                 else {
5562                         fan_control_desired_level = 0;
5563                         tp_features.fan_ctrl_status_undef = 0;
5564                 }
5565                 break;
5566
5567         case TPACPI_FAN_WR_ACPI_SFAN:
5568                 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", 0x00))
5569                         rc = -EIO;
5570                 else
5571                         fan_control_desired_level = 0;
5572                 break;
5573
5574         default:
5575                 rc = -ENXIO;
5576         }
5577
5578
5579         mutex_unlock(&fan_mutex);
5580         return rc;
5581 }
5582
5583 static int fan_set_speed(int speed)
5584 {
5585         int rc;
5586
5587         if (!fan_control_allowed)
5588                 return -EPERM;
5589
5590         if (mutex_lock_interruptible(&fan_mutex))
5591                 return -ERESTARTSYS;
5592
5593         rc = 0;
5594         switch (fan_control_access_mode) {
5595         case TPACPI_FAN_WR_ACPI_FANS:
5596                 if (speed >= 0 && speed <= 65535) {
5597                         if (!acpi_evalf(fans_handle, NULL, NULL, "vddd",
5598                                         speed, speed, speed))
5599                                 rc = -EIO;
5600                 } else
5601                         rc = -EINVAL;
5602                 break;
5603
5604         default:
5605                 rc = -ENXIO;
5606         }
5607
5608         mutex_unlock(&fan_mutex);
5609         return rc;
5610 }
5611
5612 static void fan_watchdog_reset(void)
5613 {
5614         static int fan_watchdog_active;
5615
5616         if (fan_control_access_mode == TPACPI_FAN_WR_NONE)
5617                 return;
5618
5619         if (fan_watchdog_active)
5620                 cancel_delayed_work(&fan_watchdog_task);
5621
5622         if (fan_watchdog_maxinterval > 0 &&
5623             tpacpi_lifecycle != TPACPI_LIFE_EXITING) {
5624                 fan_watchdog_active = 1;
5625                 if (!queue_delayed_work(tpacpi_wq, &fan_watchdog_task,
5626                                 msecs_to_jiffies(fan_watchdog_maxinterval
5627                                                  * 1000))) {
5628                         printk(TPACPI_ERR
5629                                "failed to queue the fan watchdog, "
5630                                "watchdog will not trigger\n");
5631                 }
5632         } else
5633                 fan_watchdog_active = 0;
5634 }
5635
5636 static void fan_watchdog_fire(struct work_struct *ignored)
5637 {
5638         int rc;
5639
5640         if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
5641                 return;
5642
5643         printk(TPACPI_NOTICE "fan watchdog: enabling fan\n");
5644         rc = fan_set_enable();
5645         if (rc < 0) {
5646                 printk(TPACPI_ERR "fan watchdog: error %d while enabling fan, "
5647                         "will try again later...\n", -rc);
5648                 /* reschedule for later */
5649                 fan_watchdog_reset();
5650         }
5651 }
5652
5653 /*
5654  * SYSFS fan layout: hwmon compatible (device)
5655  *
5656  * pwm*_enable:
5657  *      0: "disengaged" mode
5658  *      1: manual mode
5659  *      2: native EC "auto" mode (recommended, hardware default)
5660  *
5661  * pwm*: set speed in manual mode, ignored otherwise.
5662  *      0 is level 0; 255 is level 7. Intermediate points done with linear
5663  *      interpolation.
5664  *
5665  * fan*_input: tachometer reading, RPM
5666  *
5667  *
5668  * SYSFS fan layout: extensions
5669  *
5670  * fan_watchdog (driver):
5671  *      fan watchdog interval in seconds, 0 disables (default), max 120
5672  */
5673
5674 /* sysfs fan pwm1_enable ----------------------------------------------- */
5675 static ssize_t fan_pwm1_enable_show(struct device *dev,
5676                                     struct device_attribute *attr,
5677                                     char *buf)
5678 {
5679         int res, mode;
5680         u8 status;
5681
5682         res = fan_get_status_safe(&status);
5683         if (res)
5684                 return res;
5685
5686         if (unlikely(tp_features.fan_ctrl_status_undef)) {
5687                 if (status != fan_control_initial_status) {
5688                         tp_features.fan_ctrl_status_undef = 0;
5689                 } else {
5690                         /* Return most likely status. In fact, it
5691                          * might be the only possible status */
5692                         status = TP_EC_FAN_AUTO;
5693                 }
5694         }
5695
5696         if (status & TP_EC_FAN_FULLSPEED) {
5697                 mode = 0;
5698         } else if (status & TP_EC_FAN_AUTO) {
5699                 mode = 2;
5700         } else
5701                 mode = 1;
5702
5703         return snprintf(buf, PAGE_SIZE, "%d\n", mode);
5704 }
5705
5706 static ssize_t fan_pwm1_enable_store(struct device *dev,
5707                                      struct device_attribute *attr,
5708                                      const char *buf, size_t count)
5709 {
5710         unsigned long t;
5711         int res, level;
5712
5713         if (parse_strtoul(buf, 2, &t))
5714                 return -EINVAL;
5715
5716         switch (t) {
5717         case 0:
5718                 level = TP_EC_FAN_FULLSPEED;
5719                 break;
5720         case 1:
5721                 level = TPACPI_FAN_LAST_LEVEL;
5722                 break;
5723         case 2:
5724                 level = TP_EC_FAN_AUTO;
5725                 break;
5726         case 3:
5727                 /* reserved for software-controlled auto mode */
5728                 return -ENOSYS;
5729         default:
5730                 return -EINVAL;
5731         }
5732
5733         res = fan_set_level_safe(level);
5734         if (res == -ENXIO)
5735                 return -EINVAL;
5736         else if (res < 0)
5737                 return res;
5738
5739         fan_watchdog_reset();
5740
5741         return count;
5742 }
5743
5744 static struct device_attribute dev_attr_fan_pwm1_enable =
5745         __ATTR(pwm1_enable, S_IWUSR | S_IRUGO,
5746                 fan_pwm1_enable_show, fan_pwm1_enable_store);
5747
5748 /* sysfs fan pwm1 ------------------------------------------------------ */
5749 static ssize_t fan_pwm1_show(struct device *dev,
5750                              struct device_attribute *attr,
5751                              char *buf)
5752 {
5753         int res;
5754         u8 status;
5755
5756         res = fan_get_status_safe(&status);
5757         if (res)
5758                 return res;
5759
5760         if (unlikely(tp_features.fan_ctrl_status_undef)) {
5761                 if (status != fan_control_initial_status) {
5762                         tp_features.fan_ctrl_status_undef = 0;
5763                 } else {
5764                         status = TP_EC_FAN_AUTO;
5765                 }
5766         }
5767
5768         if ((status &
5769              (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) != 0)
5770                 status = fan_control_desired_level;
5771
5772         if (status > 7)
5773                 status = 7;
5774
5775         return snprintf(buf, PAGE_SIZE, "%u\n", (status * 255) / 7);
5776 }
5777
5778 static ssize_t fan_pwm1_store(struct device *dev,
5779                               struct device_attribute *attr,
5780                               const char *buf, size_t count)
5781 {
5782         unsigned long s;
5783         int rc;
5784         u8 status, newlevel;
5785
5786         if (parse_strtoul(buf, 255, &s))
5787                 return -EINVAL;
5788
5789         /* scale down from 0-255 to 0-7 */
5790         newlevel = (s >> 5) & 0x07;
5791
5792         if (mutex_lock_interruptible(&fan_mutex))
5793                 return -ERESTARTSYS;
5794
5795         rc = fan_get_status(&status);
5796         if (!rc && (status &
5797                     (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
5798                 rc = fan_set_level(newlevel);
5799                 if (rc == -ENXIO)
5800                         rc = -EINVAL;
5801                 else if (!rc) {
5802                         fan_update_desired_level(newlevel);
5803                         fan_watchdog_reset();
5804                 }
5805         }
5806
5807         mutex_unlock(&fan_mutex);
5808         return (rc)? rc : count;
5809 }
5810
5811 static struct device_attribute dev_attr_fan_pwm1 =
5812         __ATTR(pwm1, S_IWUSR | S_IRUGO,
5813                 fan_pwm1_show, fan_pwm1_store);
5814
5815 /* sysfs fan fan1_input ------------------------------------------------ */
5816 static ssize_t fan_fan1_input_show(struct device *dev,
5817                            struct device_attribute *attr,
5818                            char *buf)
5819 {
5820         int res;
5821         unsigned int speed;
5822
5823         res = fan_get_speed(&speed);
5824         if (res < 0)
5825                 return res;
5826
5827         return snprintf(buf, PAGE_SIZE, "%u\n", speed);
5828 }
5829
5830 static struct device_attribute dev_attr_fan_fan1_input =
5831         __ATTR(fan1_input, S_IRUGO,
5832                 fan_fan1_input_show, NULL);
5833
5834 /* sysfs fan fan_watchdog (hwmon driver) ------------------------------- */
5835 static ssize_t fan_fan_watchdog_show(struct device_driver *drv,
5836                                      char *buf)
5837 {
5838         return snprintf(buf, PAGE_SIZE, "%u\n", fan_watchdog_maxinterval);
5839 }
5840
5841 static ssize_t fan_fan_watchdog_store(struct device_driver *drv,
5842                                       const char *buf, size_t count)
5843 {
5844         unsigned long t;
5845
5846         if (parse_strtoul(buf, 120, &t))
5847                 return -EINVAL;
5848
5849         if (!fan_control_allowed)
5850                 return -EPERM;
5851
5852         fan_watchdog_maxinterval = t;
5853         fan_watchdog_reset();
5854
5855         return count;
5856 }
5857
5858 static DRIVER_ATTR(fan_watchdog, S_IWUSR | S_IRUGO,
5859                 fan_fan_watchdog_show, fan_fan_watchdog_store);
5860
5861 /* --------------------------------------------------------------------- */
5862 static struct attribute *fan_attributes[] = {
5863         &dev_attr_fan_pwm1_enable.attr, &dev_attr_fan_pwm1.attr,
5864         &dev_attr_fan_fan1_input.attr,
5865         NULL
5866 };
5867
5868 static const struct attribute_group fan_attr_group = {
5869         .attrs = fan_attributes,
5870 };
5871
5872 static int __init fan_init(struct ibm_init_struct *iibm)
5873 {
5874         int rc;
5875
5876         vdbg_printk(TPACPI_DBG_INIT, "initializing fan subdriver\n");
5877
5878         mutex_init(&fan_mutex);
5879         fan_status_access_mode = TPACPI_FAN_NONE;
5880         fan_control_access_mode = TPACPI_FAN_WR_NONE;
5881         fan_control_commands = 0;
5882         fan_watchdog_maxinterval = 0;
5883         tp_features.fan_ctrl_status_undef = 0;
5884         fan_control_desired_level = 7;
5885
5886         TPACPI_ACPIHANDLE_INIT(fans);
5887         TPACPI_ACPIHANDLE_INIT(gfan);
5888         TPACPI_ACPIHANDLE_INIT(sfan);
5889
5890         if (gfan_handle) {
5891                 /* 570, 600e/x, 770e, 770x */
5892                 fan_status_access_mode = TPACPI_FAN_RD_ACPI_GFAN;
5893         } else {
5894                 /* all other ThinkPads: note that even old-style
5895                  * ThinkPad ECs supports the fan control register */
5896                 if (likely(acpi_ec_read(fan_status_offset,
5897                                         &fan_control_initial_status))) {
5898                         fan_status_access_mode = TPACPI_FAN_RD_TPEC;
5899
5900                         /* In some ThinkPads, neither the EC nor the ACPI
5901                          * DSDT initialize the fan status, and it ends up
5902                          * being set to 0x07 when it *could* be either
5903                          * 0x07 or 0x80.
5904                          *
5905                          * Enable for TP-1Y (T43), TP-78 (R51e),
5906                          * TP-76 (R52), TP-70 (T43, R52), which are known
5907                          * to be buggy. */
5908                         if (fan_control_initial_status == 0x07) {
5909                                 switch (thinkpad_id.ec_model) {
5910                                 case 0x5931: /* TP-1Y */
5911                                 case 0x3837: /* TP-78 */
5912                                 case 0x3637: /* TP-76 */
5913                                 case 0x3037: /* TP-70 */
5914                                         printk(TPACPI_NOTICE
5915                                                "fan_init: initial fan status "
5916                                                "is unknown, assuming it is "
5917                                                "in auto mode\n");
5918                                         tp_features.fan_ctrl_status_undef = 1;
5919                                         ;;
5920                                 }
5921                         }
5922                 } else {
5923                         printk(TPACPI_ERR
5924                                "ThinkPad ACPI EC access misbehaving, "
5925                                "fan status and control unavailable\n");
5926                         return 1;
5927                 }
5928         }
5929
5930         if (sfan_handle) {
5931                 /* 570, 770x-JL */
5932                 fan_control_access_mode = TPACPI_FAN_WR_ACPI_SFAN;
5933                 fan_control_commands |=
5934                     TPACPI_FAN_CMD_LEVEL | TPACPI_FAN_CMD_ENABLE;
5935         } else {
5936                 if (!gfan_handle) {
5937                         /* gfan without sfan means no fan control */
5938                         /* all other models implement TP EC 0x2f control */
5939
5940                         if (fans_handle) {
5941                                 /* X31, X40, X41 */
5942                                 fan_control_access_mode =
5943                                     TPACPI_FAN_WR_ACPI_FANS;
5944                                 fan_control_commands |=
5945                                     TPACPI_FAN_CMD_SPEED |
5946                                     TPACPI_FAN_CMD_LEVEL |
5947                                     TPACPI_FAN_CMD_ENABLE;
5948                         } else {
5949                                 fan_control_access_mode = TPACPI_FAN_WR_TPEC;
5950                                 fan_control_commands |=
5951                                     TPACPI_FAN_CMD_LEVEL |
5952                                     TPACPI_FAN_CMD_ENABLE;
5953                         }
5954                 }
5955         }
5956
5957         vdbg_printk(TPACPI_DBG_INIT, "fan is %s, modes %d, %d\n",
5958                 str_supported(fan_status_access_mode != TPACPI_FAN_NONE ||
5959                   fan_control_access_mode != TPACPI_FAN_WR_NONE),
5960                 fan_status_access_mode, fan_control_access_mode);
5961
5962         /* fan control master switch */
5963         if (!fan_control_allowed) {
5964                 fan_control_access_mode = TPACPI_FAN_WR_NONE;
5965                 fan_control_commands = 0;
5966                 dbg_printk(TPACPI_DBG_INIT,
5967                            "fan control features disabled by parameter\n");
5968         }
5969
5970         /* update fan_control_desired_level */
5971         if (fan_status_access_mode != TPACPI_FAN_NONE)
5972                 fan_get_status_safe(NULL);
5973
5974         if (fan_status_access_mode != TPACPI_FAN_NONE ||
5975             fan_control_access_mode != TPACPI_FAN_WR_NONE) {
5976                 rc = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
5977                                          &fan_attr_group);
5978                 if (rc < 0)
5979                         return rc;
5980
5981                 rc = driver_create_file(&tpacpi_hwmon_pdriver.driver,
5982                                         &driver_attr_fan_watchdog);
5983                 if (rc < 0) {
5984                         sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
5985                                         &fan_attr_group);
5986                         return rc;
5987                 }
5988                 return 0;
5989         } else
5990                 return 1;
5991 }
5992
5993 static void fan_exit(void)
5994 {
5995         vdbg_printk(TPACPI_DBG_EXIT,
5996                     "cancelling any pending fan watchdog tasks\n");
5997
5998         /* FIXME: can we really do this unconditionally? */
5999         sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj, &fan_attr_group);
6000         driver_remove_file(&tpacpi_hwmon_pdriver.driver,
6001                            &driver_attr_fan_watchdog);
6002
6003         cancel_delayed_work(&fan_watchdog_task);
6004         flush_workqueue(tpacpi_wq);
6005 }
6006
6007 static void fan_suspend(pm_message_t state)
6008 {
6009         int rc;
6010
6011         if (!fan_control_allowed)
6012                 return;
6013
6014         /* Store fan status in cache */
6015         fan_control_resume_level = 0;
6016         rc = fan_get_status_safe(&fan_control_resume_level);
6017         if (rc < 0)
6018                 printk(TPACPI_NOTICE
6019                         "failed to read fan level for later "
6020                         "restore during resume: %d\n", rc);
6021
6022         /* if it is undefined, don't attempt to restore it.
6023          * KEEP THIS LAST */
6024         if (tp_features.fan_ctrl_status_undef)
6025                 fan_control_resume_level = 0;
6026 }
6027
6028 static void fan_resume(void)
6029 {
6030         u8 current_level = 7;
6031         bool do_set = false;
6032         int rc;
6033
6034         /* DSDT *always* updates status on resume */
6035         tp_features.fan_ctrl_status_undef = 0;
6036
6037         if (!fan_control_allowed ||
6038             !fan_control_resume_level ||
6039             (fan_get_status_safe(&current_level) < 0))
6040                 return;
6041
6042         switch (fan_control_access_mode) {
6043         case TPACPI_FAN_WR_ACPI_SFAN:
6044                 /* never decrease fan level */
6045                 do_set = (fan_control_resume_level > current_level);
6046                 break;
6047         case TPACPI_FAN_WR_ACPI_FANS:
6048         case TPACPI_FAN_WR_TPEC:
6049                 /* never decrease fan level, scale is:
6050                  * TP_EC_FAN_FULLSPEED > 7 >= TP_EC_FAN_AUTO
6051                  *
6052                  * We expect the firmware to set either 7 or AUTO, but we
6053                  * handle FULLSPEED out of paranoia.
6054                  *
6055                  * So, we can safely only restore FULLSPEED or 7, anything
6056                  * else could slow the fan.  Restoring AUTO is useless, at
6057                  * best that's exactly what the DSDT already set (it is the
6058                  * slower it uses).
6059                  *
6060                  * Always keep in mind that the DSDT *will* have set the
6061                  * fans to what the vendor supposes is the best level.  We
6062                  * muck with it only to speed the fan up.
6063                  */
6064                 if (fan_control_resume_level != 7 &&
6065                     !(fan_control_resume_level & TP_EC_FAN_FULLSPEED))
6066                         return;
6067                 else
6068                         do_set = !(current_level & TP_EC_FAN_FULLSPEED) &&
6069                                  (current_level != fan_control_resume_level);
6070                 break;
6071         default:
6072                 return;
6073         }
6074         if (do_set) {
6075                 printk(TPACPI_NOTICE
6076                         "restoring fan level to 0x%02x\n",
6077                         fan_control_resume_level);
6078                 rc = fan_set_level_safe(fan_control_resume_level);
6079                 if (rc < 0)
6080                         printk(TPACPI_NOTICE
6081                                 "failed to restore fan level: %d\n", rc);
6082         }
6083 }
6084
6085 static int fan_read(char *p)
6086 {
6087         int len = 0;
6088         int rc;
6089         u8 status;
6090         unsigned int speed = 0;
6091
6092         switch (fan_status_access_mode) {
6093         case TPACPI_FAN_RD_ACPI_GFAN:
6094                 /* 570, 600e/x, 770e, 770x */
6095                 rc = fan_get_status_safe(&status);
6096                 if (rc < 0)
6097                         return rc;
6098
6099                 len += sprintf(p + len, "status:\t\t%s\n"
6100                                "level:\t\t%d\n",
6101                                (status != 0) ? "enabled" : "disabled", status);
6102                 break;
6103
6104         case TPACPI_FAN_RD_TPEC:
6105                 /* all except 570, 600e/x, 770e, 770x */
6106                 rc = fan_get_status_safe(&status);
6107                 if (rc < 0)
6108                         return rc;
6109
6110                 if (unlikely(tp_features.fan_ctrl_status_undef)) {
6111                         if (status != fan_control_initial_status)
6112                                 tp_features.fan_ctrl_status_undef = 0;
6113                         else
6114                                 /* Return most likely status. In fact, it
6115                                  * might be the only possible status */
6116                                 status = TP_EC_FAN_AUTO;
6117                 }
6118
6119                 len += sprintf(p + len, "status:\t\t%s\n",
6120                                (status != 0) ? "enabled" : "disabled");
6121
6122                 rc = fan_get_speed(&speed);
6123                 if (rc < 0)
6124                         return rc;
6125
6126                 len += sprintf(p + len, "speed:\t\t%d\n", speed);
6127
6128                 if (status & TP_EC_FAN_FULLSPEED)
6129                         /* Disengaged mode takes precedence */
6130                         len += sprintf(p + len, "level:\t\tdisengaged\n");
6131                 else if (status & TP_EC_FAN_AUTO)
6132                         len += sprintf(p + len, "level:\t\tauto\n");
6133                 else
6134                         len += sprintf(p + len, "level:\t\t%d\n", status);
6135                 break;
6136
6137         case TPACPI_FAN_NONE:
6138         default:
6139                 len += sprintf(p + len, "status:\t\tnot supported\n");
6140         }
6141
6142         if (fan_control_commands & TPACPI_FAN_CMD_LEVEL) {
6143                 len += sprintf(p + len, "commands:\tlevel <level>");
6144
6145                 switch (fan_control_access_mode) {
6146                 case TPACPI_FAN_WR_ACPI_SFAN:
6147                         len += sprintf(p + len, " (<level> is 0-7)\n");
6148                         break;
6149
6150                 default:
6151                         len += sprintf(p + len, " (<level> is 0-7, "
6152                                        "auto, disengaged, full-speed)\n");
6153                         break;
6154                 }
6155         }
6156
6157         if (fan_control_commands & TPACPI_FAN_CMD_ENABLE)
6158                 len += sprintf(p + len, "commands:\tenable, disable\n"
6159                                "commands:\twatchdog <timeout> (<timeout> "
6160                                "is 0 (off), 1-120 (seconds))\n");
6161
6162         if (fan_control_commands & TPACPI_FAN_CMD_SPEED)
6163                 len += sprintf(p + len, "commands:\tspeed <speed>"
6164                                " (<speed> is 0-65535)\n");
6165
6166         return len;
6167 }
6168
6169 static int fan_write_cmd_level(const char *cmd, int *rc)
6170 {
6171         int level;
6172
6173         if (strlencmp(cmd, "level auto") == 0)
6174                 level = TP_EC_FAN_AUTO;
6175         else if ((strlencmp(cmd, "level disengaged") == 0) |
6176                         (strlencmp(cmd, "level full-speed") == 0))
6177                 level = TP_EC_FAN_FULLSPEED;
6178         else if (sscanf(cmd, "level %d", &level) != 1)
6179                 return 0;
6180
6181         *rc = fan_set_level_safe(level);
6182         if (*rc == -ENXIO)
6183                 printk(TPACPI_ERR "level command accepted for unsupported "
6184                        "access mode %d", fan_control_access_mode);
6185
6186         return 1;
6187 }
6188
6189 static int fan_write_cmd_enable(const char *cmd, int *rc)
6190 {
6191         if (strlencmp(cmd, "enable") != 0)
6192                 return 0;
6193
6194         *rc = fan_set_enable();
6195         if (*rc == -ENXIO)
6196                 printk(TPACPI_ERR "enable command accepted for unsupported "
6197                        "access mode %d", fan_control_access_mode);
6198
6199         return 1;
6200 }
6201
6202 static int fan_write_cmd_disable(const char *cmd, int *rc)
6203 {
6204         if (strlencmp(cmd, "disable") != 0)
6205                 return 0;
6206
6207         *rc = fan_set_disable();
6208         if (*rc == -ENXIO)
6209                 printk(TPACPI_ERR "disable command accepted for unsupported "
6210                        "access mode %d", fan_control_access_mode);
6211
6212         return 1;
6213 }
6214
6215 static int fan_write_cmd_speed(const char *cmd, int *rc)
6216 {
6217         int speed;
6218
6219         /* TODO:
6220          * Support speed <low> <medium> <high> ? */
6221
6222         if (sscanf(cmd, "speed %d", &speed) != 1)
6223                 return 0;
6224
6225         *rc = fan_set_speed(speed);
6226         if (*rc == -ENXIO)
6227                 printk(TPACPI_ERR "speed command accepted for unsupported "
6228                        "access mode %d", fan_control_access_mode);
6229
6230         return 1;
6231 }
6232
6233 static int fan_write_cmd_watchdog(const char *cmd, int *rc)
6234 {
6235         int interval;
6236
6237         if (sscanf(cmd, "watchdog %d", &interval) != 1)
6238                 return 0;
6239
6240         if (interval < 0 || interval > 120)
6241                 *rc = -EINVAL;
6242         else
6243                 fan_watchdog_maxinterval = interval;
6244
6245         return 1;
6246 }
6247
6248 static int fan_write(char *buf)
6249 {
6250         char *cmd;
6251         int rc = 0;
6252
6253         while (!rc && (cmd = next_cmd(&buf))) {
6254                 if (!((fan_control_commands & TPACPI_FAN_CMD_LEVEL) &&
6255                       fan_write_cmd_level(cmd, &rc)) &&
6256                     !((fan_control_commands & TPACPI_FAN_CMD_ENABLE) &&
6257                       (fan_write_cmd_enable(cmd, &rc) ||
6258                        fan_write_cmd_disable(cmd, &rc) ||
6259                        fan_write_cmd_watchdog(cmd, &rc))) &&
6260                     !((fan_control_commands & TPACPI_FAN_CMD_SPEED) &&
6261                       fan_write_cmd_speed(cmd, &rc))
6262                     )
6263                         rc = -EINVAL;
6264                 else if (!rc)
6265                         fan_watchdog_reset();
6266         }
6267
6268         return rc;
6269 }
6270
6271 static struct ibm_struct fan_driver_data = {
6272         .name = "fan",
6273         .read = fan_read,
6274         .write = fan_write,
6275         .exit = fan_exit,
6276         .suspend = fan_suspend,
6277         .resume = fan_resume,
6278 };
6279
6280 /****************************************************************************
6281  ****************************************************************************
6282  *
6283  * Infrastructure
6284  *
6285  ****************************************************************************
6286  ****************************************************************************/
6287
6288 /* sysfs name ---------------------------------------------------------- */
6289 static ssize_t thinkpad_acpi_pdev_name_show(struct device *dev,
6290                            struct device_attribute *attr,
6291                            char *buf)
6292 {
6293         return snprintf(buf, PAGE_SIZE, "%s\n", TPACPI_NAME);
6294 }
6295
6296 static struct device_attribute dev_attr_thinkpad_acpi_pdev_name =
6297         __ATTR(name, S_IRUGO, thinkpad_acpi_pdev_name_show, NULL);
6298
6299 /* --------------------------------------------------------------------- */
6300
6301 /* /proc support */
6302 static struct proc_dir_entry *proc_dir;
6303
6304 /*
6305  * Module and infrastructure proble, init and exit handling
6306  */
6307
6308 static int force_load;
6309
6310 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
6311 static const char * __init str_supported(int is_supported)
6312 {
6313         static char text_unsupported[] __initdata = "not supported";
6314
6315         return (is_supported)? &text_unsupported[4] : &text_unsupported[0];
6316 }
6317 #endif /* CONFIG_THINKPAD_ACPI_DEBUG */
6318
6319 static void ibm_exit(struct ibm_struct *ibm)
6320 {
6321         dbg_printk(TPACPI_DBG_EXIT, "removing %s\n", ibm->name);
6322
6323         list_del_init(&ibm->all_drivers);
6324
6325         if (ibm->flags.acpi_notify_installed) {
6326                 dbg_printk(TPACPI_DBG_EXIT,
6327                         "%s: acpi_remove_notify_handler\n", ibm->name);
6328                 BUG_ON(!ibm->acpi);
6329                 acpi_remove_notify_handler(*ibm->acpi->handle,
6330                                            ibm->acpi->type,
6331                                            dispatch_acpi_notify);
6332                 ibm->flags.acpi_notify_installed = 0;
6333                 ibm->flags.acpi_notify_installed = 0;
6334         }
6335
6336         if (ibm->flags.proc_created) {
6337                 dbg_printk(TPACPI_DBG_EXIT,
6338                         "%s: remove_proc_entry\n", ibm->name);
6339                 remove_proc_entry(ibm->name, proc_dir);
6340                 ibm->flags.proc_created = 0;
6341         }
6342
6343         if (ibm->flags.acpi_driver_registered) {
6344                 dbg_printk(TPACPI_DBG_EXIT,
6345                         "%s: acpi_bus_unregister_driver\n", ibm->name);
6346                 BUG_ON(!ibm->acpi);
6347                 acpi_bus_unregister_driver(ibm->acpi->driver);
6348                 kfree(ibm->acpi->driver);
6349                 ibm->acpi->driver = NULL;
6350                 ibm->flags.acpi_driver_registered = 0;
6351         }
6352
6353         if (ibm->flags.init_called && ibm->exit) {
6354                 ibm->exit();
6355                 ibm->flags.init_called = 0;
6356         }
6357
6358         dbg_printk(TPACPI_DBG_INIT, "finished removing %s\n", ibm->name);
6359 }
6360
6361 static int __init ibm_init(struct ibm_init_struct *iibm)
6362 {
6363         int ret;
6364         struct ibm_struct *ibm = iibm->data;
6365         struct proc_dir_entry *entry;
6366
6367         BUG_ON(ibm == NULL);
6368
6369         INIT_LIST_HEAD(&ibm->all_drivers);
6370
6371         if (ibm->flags.experimental && !experimental)
6372                 return 0;
6373
6374         dbg_printk(TPACPI_DBG_INIT,
6375                 "probing for %s\n", ibm->name);
6376
6377         if (iibm->init) {
6378                 ret = iibm->init(iibm);
6379                 if (ret > 0)
6380                         return 0;       /* probe failed */
6381                 if (ret)
6382                         return ret;
6383
6384                 ibm->flags.init_called = 1;
6385         }
6386
6387         if (ibm->acpi) {
6388                 if (ibm->acpi->hid) {
6389                         ret = register_tpacpi_subdriver(ibm);
6390                         if (ret)
6391                                 goto err_out;
6392                 }
6393
6394                 if (ibm->acpi->notify) {
6395                         ret = setup_acpi_notify(ibm);
6396                         if (ret == -ENODEV) {
6397                                 printk(TPACPI_NOTICE "disabling subdriver %s\n",
6398                                         ibm->name);
6399                                 ret = 0;
6400                                 goto err_out;
6401                         }
6402                         if (ret < 0)
6403                                 goto err_out;
6404                 }
6405         }
6406
6407         dbg_printk(TPACPI_DBG_INIT,
6408                 "%s installed\n", ibm->name);
6409
6410         if (ibm->read) {
6411                 entry = create_proc_entry(ibm->name,
6412                                           S_IFREG | S_IRUGO | S_IWUSR,
6413                                           proc_dir);
6414                 if (!entry) {
6415                         printk(TPACPI_ERR "unable to create proc entry %s\n",
6416                                ibm->name);
6417                         ret = -ENODEV;
6418                         goto err_out;
6419                 }
6420                 entry->owner = THIS_MODULE;
6421                 entry->data = ibm;
6422                 entry->read_proc = &dispatch_procfs_read;
6423                 if (ibm->write)
6424                         entry->write_proc = &dispatch_procfs_write;
6425                 ibm->flags.proc_created = 1;
6426         }
6427
6428         list_add_tail(&ibm->all_drivers, &tpacpi_all_drivers);
6429
6430         return 0;
6431
6432 err_out:
6433         dbg_printk(TPACPI_DBG_INIT,
6434                 "%s: at error exit path with result %d\n",
6435                 ibm->name, ret);
6436
6437         ibm_exit(ibm);
6438         return (ret < 0)? ret : 0;
6439 }
6440
6441 /* Probing */
6442
6443 /* returns 0 - probe ok, or < 0 - probe error.
6444  * Probe ok doesn't mean thinkpad found.
6445  * On error, kfree() cleanup on tp->* is not performed, caller must do it */
6446 static int __must_check __init get_thinkpad_model_data(
6447                                                 struct thinkpad_id_data *tp)
6448 {
6449         const struct dmi_device *dev = NULL;
6450         char ec_fw_string[18];
6451         char const *s;
6452
6453         if (!tp)
6454                 return -EINVAL;
6455
6456         memset(tp, 0, sizeof(*tp));
6457
6458         if (dmi_name_in_vendors("IBM"))
6459                 tp->vendor = PCI_VENDOR_ID_IBM;
6460         else if (dmi_name_in_vendors("LENOVO"))
6461                 tp->vendor = PCI_VENDOR_ID_LENOVO;
6462         else
6463                 return 0;
6464
6465         s = dmi_get_system_info(DMI_BIOS_VERSION);
6466         tp->bios_version_str = kstrdup(s, GFP_KERNEL);
6467         if (s && !tp->bios_version_str)
6468                 return -ENOMEM;
6469         if (!tp->bios_version_str)
6470                 return 0;
6471         tp->bios_model = tp->bios_version_str[0]
6472                          | (tp->bios_version_str[1] << 8);
6473
6474         /*
6475          * ThinkPad T23 or newer, A31 or newer, R50e or newer,
6476          * X32 or newer, all Z series;  Some models must have an
6477          * up-to-date BIOS or they will not be detected.
6478          *
6479          * See http://thinkwiki.org/wiki/List_of_DMI_IDs
6480          */
6481         while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) {
6482                 if (sscanf(dev->name,
6483                            "IBM ThinkPad Embedded Controller -[%17c",
6484                            ec_fw_string) == 1) {
6485                         ec_fw_string[sizeof(ec_fw_string) - 1] = 0;
6486                         ec_fw_string[strcspn(ec_fw_string, " ]")] = 0;
6487
6488                         tp->ec_version_str = kstrdup(ec_fw_string, GFP_KERNEL);
6489                         if (!tp->ec_version_str)
6490                                 return -ENOMEM;
6491                         tp->ec_model = ec_fw_string[0]
6492                                         | (ec_fw_string[1] << 8);
6493                         break;
6494                 }
6495         }
6496
6497         s = dmi_get_system_info(DMI_PRODUCT_VERSION);
6498         if (s && !strnicmp(s, "ThinkPad", 8)) {
6499                 tp->model_str = kstrdup(s, GFP_KERNEL);
6500                 if (!tp->model_str)
6501                         return -ENOMEM;
6502         }
6503
6504         s = dmi_get_system_info(DMI_PRODUCT_NAME);
6505         tp->nummodel_str = kstrdup(s, GFP_KERNEL);
6506         if (s && !tp->nummodel_str)
6507                 return -ENOMEM;
6508
6509         return 0;
6510 }
6511
6512 static int __init probe_for_thinkpad(void)
6513 {
6514         int is_thinkpad;
6515
6516         if (acpi_disabled)
6517                 return -ENODEV;
6518
6519         /*
6520          * Non-ancient models have better DMI tagging, but very old models
6521          * don't.
6522          */
6523         is_thinkpad = (thinkpad_id.model_str != NULL);
6524
6525         /* ec is required because many other handles are relative to it */
6526         TPACPI_ACPIHANDLE_INIT(ec);
6527         if (!ec_handle) {
6528                 if (is_thinkpad)
6529                         printk(TPACPI_ERR
6530                                 "Not yet supported ThinkPad detected!\n");
6531                 return -ENODEV;
6532         }
6533
6534         /*
6535          * Risks a regression on very old machines, but reduces potential
6536          * false positives a damn great deal
6537          */
6538         if (!is_thinkpad)
6539                 is_thinkpad = (thinkpad_id.vendor == PCI_VENDOR_ID_IBM);
6540
6541         if (!is_thinkpad && !force_load)
6542                 return -ENODEV;
6543
6544         return 0;
6545 }
6546
6547
6548 /* Module init, exit, parameters */
6549
6550 static struct ibm_init_struct ibms_init[] __initdata = {
6551         {
6552                 .init = thinkpad_acpi_driver_init,
6553                 .data = &thinkpad_acpi_driver_data,
6554         },
6555         {
6556                 .init = hotkey_init,
6557                 .data = &hotkey_driver_data,
6558         },
6559         {
6560                 .init = bluetooth_init,
6561                 .data = &bluetooth_driver_data,
6562         },
6563         {
6564                 .init = wan_init,
6565                 .data = &wan_driver_data,
6566         },
6567 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
6568         {
6569                 .init = video_init,
6570                 .data = &video_driver_data,
6571         },
6572 #endif
6573         {
6574                 .init = light_init,
6575                 .data = &light_driver_data,
6576         },
6577 #ifdef CONFIG_THINKPAD_ACPI_DOCK
6578         {
6579                 .init = dock_init,
6580                 .data = &dock_driver_data[0],
6581         },
6582         {
6583                 .init = dock_init2,
6584                 .data = &dock_driver_data[1],
6585         },
6586 #endif
6587 #ifdef CONFIG_THINKPAD_ACPI_BAY
6588         {
6589                 .init = bay_init,
6590                 .data = &bay_driver_data,
6591         },
6592 #endif
6593         {
6594                 .init = cmos_init,
6595                 .data = &cmos_driver_data,
6596         },
6597         {
6598                 .init = led_init,
6599                 .data = &led_driver_data,
6600         },
6601         {
6602                 .init = beep_init,
6603                 .data = &beep_driver_data,
6604         },
6605         {
6606                 .init = thermal_init,
6607                 .data = &thermal_driver_data,
6608         },
6609         {
6610                 .data = &ecdump_driver_data,
6611         },
6612         {
6613                 .init = brightness_init,
6614                 .data = &brightness_driver_data,
6615         },
6616         {
6617                 .data = &volume_driver_data,
6618         },
6619         {
6620                 .init = fan_init,
6621                 .data = &fan_driver_data,
6622         },
6623 };
6624
6625 static int __init set_ibm_param(const char *val, struct kernel_param *kp)
6626 {
6627         unsigned int i;
6628         struct ibm_struct *ibm;
6629
6630         if (!kp || !kp->name || !val)
6631                 return -EINVAL;
6632
6633         for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
6634                 ibm = ibms_init[i].data;
6635                 WARN_ON(ibm == NULL);
6636
6637                 if (!ibm || !ibm->name)
6638                         continue;
6639
6640                 if (strcmp(ibm->name, kp->name) == 0 && ibm->write) {
6641                         if (strlen(val) > sizeof(ibms_init[i].param) - 2)
6642                                 return -ENOSPC;
6643                         strcpy(ibms_init[i].param, val);
6644                         strcat(ibms_init[i].param, ",");
6645                         return 0;
6646                 }
6647         }
6648
6649         return -EINVAL;
6650 }
6651
6652 module_param(experimental, int, 0);
6653 MODULE_PARM_DESC(experimental,
6654                  "Enables experimental features when non-zero");
6655
6656 module_param_named(debug, dbg_level, uint, 0);
6657 MODULE_PARM_DESC(debug, "Sets debug level bit-mask");
6658
6659 module_param(force_load, bool, 0);
6660 MODULE_PARM_DESC(force_load,
6661                  "Attempts to load the driver even on a "
6662                  "mis-identified ThinkPad when true");
6663
6664 module_param_named(fan_control, fan_control_allowed, bool, 0);
6665 MODULE_PARM_DESC(fan_control,
6666                  "Enables setting fan parameters features when true");
6667
6668 module_param_named(brightness_mode, brightness_mode, int, 0);
6669 MODULE_PARM_DESC(brightness_mode,
6670                  "Selects brightness control strategy: "
6671                  "0=auto, 1=EC, 2=CMOS, 3=both");
6672
6673 module_param(brightness_enable, uint, 0);
6674 MODULE_PARM_DESC(brightness_enable,
6675                  "Enables backlight control when 1, disables when 0");
6676
6677 module_param(hotkey_report_mode, uint, 0);
6678 MODULE_PARM_DESC(hotkey_report_mode,
6679                  "used for backwards compatibility with userspace, "
6680                  "see documentation");
6681
6682 #define TPACPI_PARAM(feature) \
6683         module_param_call(feature, set_ibm_param, NULL, NULL, 0); \
6684         MODULE_PARM_DESC(feature, "Simulates thinkpad-acpi procfs command " \
6685                          "at module load, see documentation")
6686
6687 TPACPI_PARAM(hotkey);
6688 TPACPI_PARAM(bluetooth);
6689 TPACPI_PARAM(video);
6690 TPACPI_PARAM(light);
6691 #ifdef CONFIG_THINKPAD_ACPI_DOCK
6692 TPACPI_PARAM(dock);
6693 #endif
6694 #ifdef CONFIG_THINKPAD_ACPI_BAY
6695 TPACPI_PARAM(bay);
6696 #endif /* CONFIG_THINKPAD_ACPI_BAY */
6697 TPACPI_PARAM(cmos);
6698 TPACPI_PARAM(led);
6699 TPACPI_PARAM(beep);
6700 TPACPI_PARAM(ecdump);
6701 TPACPI_PARAM(brightness);
6702 TPACPI_PARAM(volume);
6703 TPACPI_PARAM(fan);
6704
6705 static void thinkpad_acpi_module_exit(void)
6706 {
6707         struct ibm_struct *ibm, *itmp;
6708
6709         tpacpi_lifecycle = TPACPI_LIFE_EXITING;
6710
6711         list_for_each_entry_safe_reverse(ibm, itmp,
6712                                          &tpacpi_all_drivers,
6713                                          all_drivers) {
6714                 ibm_exit(ibm);
6715         }
6716
6717         dbg_printk(TPACPI_DBG_INIT, "finished subdriver exit path...\n");
6718
6719         if (tpacpi_inputdev) {
6720                 if (tp_features.input_device_registered)
6721                         input_unregister_device(tpacpi_inputdev);
6722                 else
6723                         input_free_device(tpacpi_inputdev);
6724         }
6725
6726         if (tpacpi_hwmon)
6727                 hwmon_device_unregister(tpacpi_hwmon);
6728
6729         if (tp_features.sensors_pdev_attrs_registered)
6730                 device_remove_file(&tpacpi_sensors_pdev->dev,
6731                                    &dev_attr_thinkpad_acpi_pdev_name);
6732         if (tpacpi_sensors_pdev)
6733                 platform_device_unregister(tpacpi_sensors_pdev);
6734         if (tpacpi_pdev)
6735                 platform_device_unregister(tpacpi_pdev);
6736
6737         if (tp_features.sensors_pdrv_attrs_registered)
6738                 tpacpi_remove_driver_attributes(&tpacpi_hwmon_pdriver.driver);
6739         if (tp_features.platform_drv_attrs_registered)
6740                 tpacpi_remove_driver_attributes(&tpacpi_pdriver.driver);
6741
6742         if (tp_features.sensors_pdrv_registered)
6743                 platform_driver_unregister(&tpacpi_hwmon_pdriver);
6744
6745         if (tp_features.platform_drv_registered)
6746                 platform_driver_unregister(&tpacpi_pdriver);
6747
6748         if (proc_dir)
6749                 remove_proc_entry(TPACPI_PROC_DIR, acpi_root_dir);
6750
6751         if (tpacpi_wq)
6752                 destroy_workqueue(tpacpi_wq);
6753
6754         kfree(thinkpad_id.bios_version_str);
6755         kfree(thinkpad_id.ec_version_str);
6756         kfree(thinkpad_id.model_str);
6757 }
6758
6759
6760 static int __init thinkpad_acpi_module_init(void)
6761 {
6762         int ret, i;
6763
6764         tpacpi_lifecycle = TPACPI_LIFE_INIT;
6765
6766         /* Parameter checking */
6767         if (hotkey_report_mode > 2)
6768                 return -EINVAL;
6769
6770         /* Driver-level probe */
6771
6772         ret = get_thinkpad_model_data(&thinkpad_id);
6773         if (ret) {
6774                 printk(TPACPI_ERR
6775                         "unable to get DMI data: %d\n", ret);
6776                 thinkpad_acpi_module_exit();
6777                 return ret;
6778         }
6779         ret = probe_for_thinkpad();
6780         if (ret) {
6781                 thinkpad_acpi_module_exit();
6782                 return ret;
6783         }
6784
6785         /* Driver initialization */
6786
6787         TPACPI_ACPIHANDLE_INIT(ecrd);
6788         TPACPI_ACPIHANDLE_INIT(ecwr);
6789
6790         tpacpi_wq = create_singlethread_workqueue(TPACPI_WORKQUEUE_NAME);
6791         if (!tpacpi_wq) {
6792                 thinkpad_acpi_module_exit();
6793                 return -ENOMEM;
6794         }
6795
6796         proc_dir = proc_mkdir(TPACPI_PROC_DIR, acpi_root_dir);
6797         if (!proc_dir) {
6798                 printk(TPACPI_ERR
6799                        "unable to create proc dir " TPACPI_PROC_DIR);
6800                 thinkpad_acpi_module_exit();
6801                 return -ENODEV;
6802         }
6803         proc_dir->owner = THIS_MODULE;
6804
6805         ret = platform_driver_register(&tpacpi_pdriver);
6806         if (ret) {
6807                 printk(TPACPI_ERR
6808                        "unable to register main platform driver\n");
6809                 thinkpad_acpi_module_exit();
6810                 return ret;
6811         }
6812         tp_features.platform_drv_registered = 1;
6813
6814         ret = platform_driver_register(&tpacpi_hwmon_pdriver);
6815         if (ret) {
6816                 printk(TPACPI_ERR
6817                        "unable to register hwmon platform driver\n");
6818                 thinkpad_acpi_module_exit();
6819                 return ret;
6820         }
6821         tp_features.sensors_pdrv_registered = 1;
6822
6823         ret = tpacpi_create_driver_attributes(&tpacpi_pdriver.driver);
6824         if (!ret) {
6825                 tp_features.platform_drv_attrs_registered = 1;
6826                 ret = tpacpi_create_driver_attributes(
6827                                         &tpacpi_hwmon_pdriver.driver);
6828         }
6829         if (ret) {
6830                 printk(TPACPI_ERR
6831                        "unable to create sysfs driver attributes\n");
6832                 thinkpad_acpi_module_exit();
6833                 return ret;
6834         }
6835         tp_features.sensors_pdrv_attrs_registered = 1;
6836
6837
6838         /* Device initialization */
6839         tpacpi_pdev = platform_device_register_simple(TPACPI_DRVR_NAME, -1,
6840                                                         NULL, 0);
6841         if (IS_ERR(tpacpi_pdev)) {
6842                 ret = PTR_ERR(tpacpi_pdev);
6843                 tpacpi_pdev = NULL;
6844                 printk(TPACPI_ERR "unable to register platform device\n");
6845                 thinkpad_acpi_module_exit();
6846                 return ret;
6847         }
6848         tpacpi_sensors_pdev = platform_device_register_simple(
6849                                                 TPACPI_HWMON_DRVR_NAME,
6850                                                 -1, NULL, 0);
6851         if (IS_ERR(tpacpi_sensors_pdev)) {
6852                 ret = PTR_ERR(tpacpi_sensors_pdev);
6853                 tpacpi_sensors_pdev = NULL;
6854                 printk(TPACPI_ERR
6855                        "unable to register hwmon platform device\n");
6856                 thinkpad_acpi_module_exit();
6857                 return ret;
6858         }
6859         ret = device_create_file(&tpacpi_sensors_pdev->dev,
6860                                  &dev_attr_thinkpad_acpi_pdev_name);
6861         if (ret) {
6862                 printk(TPACPI_ERR
6863                        "unable to create sysfs hwmon device attributes\n");
6864                 thinkpad_acpi_module_exit();
6865                 return ret;
6866         }
6867         tp_features.sensors_pdev_attrs_registered = 1;
6868         tpacpi_hwmon = hwmon_device_register(&tpacpi_sensors_pdev->dev);
6869         if (IS_ERR(tpacpi_hwmon)) {
6870                 ret = PTR_ERR(tpacpi_hwmon);
6871                 tpacpi_hwmon = NULL;
6872                 printk(TPACPI_ERR "unable to register hwmon device\n");
6873                 thinkpad_acpi_module_exit();
6874                 return ret;
6875         }
6876         mutex_init(&tpacpi_inputdev_send_mutex);
6877         tpacpi_inputdev = input_allocate_device();
6878         if (!tpacpi_inputdev) {
6879                 printk(TPACPI_ERR "unable to allocate input device\n");
6880                 thinkpad_acpi_module_exit();
6881                 return -ENOMEM;
6882         } else {
6883                 /* Prepare input device, but don't register */
6884                 tpacpi_inputdev->name = "ThinkPad Extra Buttons";
6885                 tpacpi_inputdev->phys = TPACPI_DRVR_NAME "/input0";
6886                 tpacpi_inputdev->id.bustype = BUS_HOST;
6887                 tpacpi_inputdev->id.vendor = (thinkpad_id.vendor) ?
6888                                                 thinkpad_id.vendor :
6889                                                 PCI_VENDOR_ID_IBM;
6890                 tpacpi_inputdev->id.product = TPACPI_HKEY_INPUT_PRODUCT;
6891                 tpacpi_inputdev->id.version = TPACPI_HKEY_INPUT_VERSION;
6892         }
6893         for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
6894                 ret = ibm_init(&ibms_init[i]);
6895                 if (ret >= 0 && *ibms_init[i].param)
6896                         ret = ibms_init[i].data->write(ibms_init[i].param);
6897                 if (ret < 0) {
6898                         thinkpad_acpi_module_exit();
6899                         return ret;
6900                 }
6901         }
6902         ret = input_register_device(tpacpi_inputdev);
6903         if (ret < 0) {
6904                 printk(TPACPI_ERR "unable to register input device\n");
6905                 thinkpad_acpi_module_exit();
6906                 return ret;
6907         } else {
6908                 tp_features.input_device_registered = 1;
6909         }
6910
6911         tpacpi_lifecycle = TPACPI_LIFE_RUNNING;
6912         return 0;
6913 }
6914
6915 /* Please remove this in year 2009 */
6916 MODULE_ALIAS("ibm_acpi");
6917
6918 MODULE_ALIAS(TPACPI_DRVR_SHORTNAME);
6919
6920 /*
6921  * DMI matching for module autoloading
6922  *
6923  * See http://thinkwiki.org/wiki/List_of_DMI_IDs
6924  * See http://thinkwiki.org/wiki/BIOS_Upgrade_Downloads
6925  *
6926  * Only models listed in thinkwiki will be supported, so add yours
6927  * if it is not there yet.
6928  */
6929 #define IBM_BIOS_MODULE_ALIAS(__type) \
6930         MODULE_ALIAS("dmi:bvnIBM:bvr" __type "ET??WW")
6931
6932 /* Non-ancient thinkpads */
6933 MODULE_ALIAS("dmi:bvnIBM:*:svnIBM:*:pvrThinkPad*:rvnIBM:*");
6934 MODULE_ALIAS("dmi:bvnLENOVO:*:svnLENOVO:*:pvrThinkPad*:rvnLENOVO:*");
6935
6936 /* Ancient thinkpad BIOSes have to be identified by
6937  * BIOS type or model number, and there are far less
6938  * BIOS types than model numbers... */
6939 IBM_BIOS_MODULE_ALIAS("I[B,D,H,I,M,N,O,T,W,V,Y,Z]");
6940 IBM_BIOS_MODULE_ALIAS("1[0,3,6,8,A-G,I,K,M-P,S,T]");
6941 IBM_BIOS_MODULE_ALIAS("K[U,X-Z]");
6942
6943 MODULE_AUTHOR("Borislav Deianov, Henrique de Moraes Holschuh");
6944 MODULE_DESCRIPTION(TPACPI_DESC);
6945 MODULE_VERSION(TPACPI_VERSION);
6946 MODULE_LICENSE("GPL");
6947
6948 module_init(thinkpad_acpi_module_init);
6949 module_exit(thinkpad_acpi_module_exit);