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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 "0.20"
  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 <asm/uaccess.h>
  72
  73 #include <linux/dmi.h>
  74 #include <linux/jiffies.h>
  75 #include <linux/workqueue.h>
  76
  77 #include <acpi/acpi_drivers.h>
  78 #include <acpi/acnamesp.h>
  79
  80 #include <linux/pci_ids.h>
  81
  82
  83 /* ThinkPad CMOS commands */
  84 #define TP_CMOS_VOLUME_DOWN     0
  85 #define TP_CMOS_VOLUME_UP       1
  86 #define TP_CMOS_VOLUME_MUTE     2
  87 #define TP_CMOS_BRIGHTNESS_UP   4
  88 #define TP_CMOS_BRIGHTNESS_DOWN 5
  89 #define TP_CMOS_THINKLIGHT_ON   12
  90 #define TP_CMOS_THINKLIGHT_OFF  13
  91
  92 /* NVRAM Addresses */
  93 enum tp_nvram_addr {
  94         TP_NVRAM_ADDR_HK2               = 0x57,
  95         TP_NVRAM_ADDR_THINKLIGHT        = 0x58,
  96         TP_NVRAM_ADDR_VIDEO             = 0x59,
  97         TP_NVRAM_ADDR_BRIGHTNESS        = 0x5e,
  98         TP_NVRAM_ADDR_MIXER             = 0x60,
  99 };
 100
 101 /* NVRAM bit masks */
 102 enum {
 103         TP_NVRAM_MASK_HKT_THINKPAD      = 0x08,
 104         TP_NVRAM_MASK_HKT_ZOOM          = 0x20,
 105         TP_NVRAM_MASK_HKT_DISPLAY       = 0x40,
 106         TP_NVRAM_MASK_HKT_HIBERNATE     = 0x80,
 107         TP_NVRAM_MASK_THINKLIGHT        = 0x10,
 108         TP_NVRAM_MASK_HKT_DISPEXPND     = 0x30,
 109         TP_NVRAM_MASK_HKT_BRIGHTNESS    = 0x20,
 110         TP_NVRAM_MASK_LEVEL_BRIGHTNESS  = 0x0f,
 111         TP_NVRAM_POS_LEVEL_BRIGHTNESS   = 0,
 112         TP_NVRAM_MASK_MUTE              = 0x40,
 113         TP_NVRAM_MASK_HKT_VOLUME        = 0x80,
 114         TP_NVRAM_MASK_LEVEL_VOLUME      = 0x0f,
 115         TP_NVRAM_POS_LEVEL_VOLUME       = 0,
 116 };
 117
 118 /* ACPI HIDs */
 119 #define TPACPI_ACPI_HKEY_HID            "IBM0068"
 120
 121 /* Input IDs */
 122 #define TPACPI_HKEY_INPUT_PRODUCT       0x5054 /* "TP" */
 123 #define TPACPI_HKEY_INPUT_VERSION       0x4101
 124
 125
 126 /****************************************************************************
 127  * Main driver
 128  */
 129
 130 #define TPACPI_NAME "thinkpad"
 131 #define TPACPI_DESC "ThinkPad ACPI Extras"
 132 #define TPACPI_FILE TPACPI_NAME "_acpi"
 133 #define TPACPI_URL "http://ibm-acpi.sf.net/"
 134 #define TPACPI_MAIL "ibm-acpi-devel@lists.sourceforge.net"
 135
 136 #define TPACPI_PROC_DIR "ibm"
 137 #define TPACPI_ACPI_EVENT_PREFIX "ibm"
 138 #define TPACPI_DRVR_NAME TPACPI_FILE
 139 #define TPACPI_DRVR_SHORTNAME "tpacpi"
 140 #define TPACPI_HWMON_DRVR_NAME TPACPI_NAME "_hwmon"
 141
 142 #define TPACPI_NVRAM_KTHREAD_NAME "ktpacpi_nvramd"
 143 #define TPACPI_WORKQUEUE_NAME "ktpacpid"
 144
 145 #define TPACPI_MAX_ACPI_ARGS 3
 146
 147 /* Debugging */
 148 #define TPACPI_LOG TPACPI_FILE ": "
 149 #define TPACPI_ERR         KERN_ERR    TPACPI_LOG
 150 #define TPACPI_NOTICE KERN_NOTICE TPACPI_LOG
 151 #define TPACPI_INFO   KERN_INFO   TPACPI_LOG
 152 #define TPACPI_DEBUG  KERN_DEBUG  TPACPI_LOG
 153
 154 #define TPACPI_DBG_ALL          0xffff
 155 #define TPACPI_DBG_ALL          0xffff
 156 #define TPACPI_DBG_INIT         0x0001
 157 #define TPACPI_DBG_EXIT         0x0002
 158 #define dbg_printk(a_dbg_level, format, arg...) \
 159         do { if (dbg_level & a_dbg_level) \
 160                 printk(TPACPI_DEBUG "%s: " format, __func__ , ## arg); \
 161         } while (0)
 162 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
 163 #define vdbg_printk(a_dbg_level, format, arg...) \
 164         dbg_printk(a_dbg_level, format, ## arg)
 165 static const char *str_supported(int is_supported);
 166 #else
 167 #define vdbg_printk(a_dbg_level, format, arg...)
 168 #endif
 169
 170 #define onoff(status, bit) ((status) & (1 << (bit)) ? "on" : "off")
 171 #define enabled(status, bit) ((status) & (1 << (bit)) ? "enabled" : "disabled")
 172 #define strlencmp(a, b) (strncmp((a), (b), strlen(b)))
 173
 174
 175 /****************************************************************************
 176  * Driver-wide structs and misc. variables
 177  */
 178
 179 struct ibm_struct;
 180
 181 struct tp_acpi_drv_struct {
 182         const struct acpi_device_id *hid;
 183         struct acpi_driver *driver;
 184
 185         void (*notify) (struct ibm_struct *, u32);
 186         acpi_handle *handle;
 187         u32 type;
 188         struct acpi_device *device;
 189 };
 190
 191 struct ibm_struct {
 192         char *name;
 193
 194         int (*read) (char *);
 195         int (*write) (char *);
 196         void (*exit) (void);
 197         void (*resume) (void);
 198         void (*suspend) (pm_message_t state);
 199
 200         struct list_head all_drivers;
 201
 202         struct tp_acpi_drv_struct *acpi;
 203
 204         struct {
 205                 u8 acpi_driver_registered:1;
 206                 u8 acpi_notify_installed:1;
 207                 u8 proc_created:1;
 208                 u8 init_called:1;
 209                 u8 experimental:1;
 210         } flags;
 211 };
 212
 213 struct ibm_init_struct {
 214         char param[32];
 215
 216         int (*init) (struct ibm_init_struct *);
 217         struct ibm_struct *data;
 218 };
 219
 220 static struct {
 221 #ifdef CONFIG_THINKPAD_ACPI_BAY
 222         u32 bay_status:1;
 223         u32 bay_eject:1;
 224         u32 bay_status2:1;
 225         u32 bay_eject2:1;
 226 #endif
 227         u32 bluetooth:1;
 228         u32 hotkey:1;
 229         u32 hotkey_mask:1;
 230         u32 hotkey_wlsw:1;
 231         u32 hotkey_tablet:1;
 232         u32 light:1;
 233         u32 light_status:1;
 234         u32 bright_16levels:1;
 235         u32 bright_acpimode:1;
 236         u32 wan:1;
 237         u32 fan_ctrl_status_undef:1;
 238         u32 input_device_registered:1;
 239         u32 platform_drv_registered:1;
 240         u32 platform_drv_attrs_registered:1;
 241         u32 sensors_pdrv_registered:1;
 242         u32 sensors_pdrv_attrs_registered:1;
 243         u32 sensors_pdev_attrs_registered:1;
 244         u32 hotkey_poll_active:1;
 245 } tp_features;
 246
 247 static struct {
 248         u16 hotkey_mask_ff:1;
 249         u16 bright_cmos_ec_unsync:1;
 250 } tp_warned;
 251
 252 struct thinkpad_id_data {
 253         unsigned int vendor;    /* ThinkPad vendor:
 254                                  * PCI_VENDOR_ID_IBM/PCI_VENDOR_ID_LENOVO */
 255
 256         char *bios_version_str; /* Something like 1ZET51WW (1.03z) */
 257         char *ec_version_str;   /* Something like 1ZHT51WW-1.04a */
 258
 259         u16 bios_model;         /* Big Endian, TP-1Y = 0x5931, 0 = unknown */
 260         u16 ec_model;
 261
 262         char *model_str;        /* ThinkPad T43 */
 263         char *nummodel_str;     /* 9384A9C for a 9384-A9C model */
 264 };
 265 static struct thinkpad_id_data thinkpad_id;
 266
 267 static enum {
 268         TPACPI_LIFE_INIT = 0,
 269         TPACPI_LIFE_RUNNING,
 270         TPACPI_LIFE_EXITING,
 271 } tpacpi_lifecycle;
 272
 273 static int experimental;
 274 static u32 dbg_level;
 275
 276 static struct workqueue_struct *tpacpi_wq;
 277
 278 /* Special LED class that can defer work */
 279 struct tpacpi_led_classdev {
 280         struct led_classdev led_classdev;
 281         struct work_struct work;
 282         enum led_brightness new_brightness;
 283         unsigned int led;
 284 };
 285
 286 /****************************************************************************
 287  ****************************************************************************
 288  *
 289  * ACPI Helpers and device model
 290  *
 291  ****************************************************************************
 292  ****************************************************************************/
 293
 294 /*************************************************************************
 295  * ACPI basic handles
 296  */
 297
 298 static acpi_handle root_handle;
 299
 300 #define TPACPI_HANDLE(object, parent, paths...)                 \
 301         static acpi_handle  object##_handle;                    \
 302         static acpi_handle *object##_parent = &parent##_handle; \
 303         static char        *object##_path;                      \
 304         static char        *object##_paths[] = { paths }
 305
 306 TPACPI_HANDLE(ec, root, "\\_SB.PCI0.ISA.EC0",   /* 240, 240x */
 307            "\\_SB.PCI.ISA.EC",  /* 570 */
 308            "\\_SB.PCI0.ISA0.EC0",       /* 600e/x, 770e, 770x */
 309            "\\_SB.PCI0.ISA.EC", /* A21e, A2xm/p, T20-22, X20-21 */
 310            "\\_SB.PCI0.AD4S.EC0",       /* i1400, R30 */
 311            "\\_SB.PCI0.ICH3.EC0",       /* R31 */
 312            "\\_SB.PCI0.LPC.EC", /* all others */
 313            );
 314
 315 TPACPI_HANDLE(ecrd, ec, "ECRD");        /* 570 */
 316 TPACPI_HANDLE(ecwr, ec, "ECWR");        /* 570 */
 317
 318 TPACPI_HANDLE(cmos, root, "\\UCMS",     /* R50, R50e, R50p, R51, */
 319                                         /* T4x, X31, X40 */
 320            "\\CMOS",            /* A3x, G4x, R32, T23, T30, X22-24, X30 */
 321            "\\CMS",             /* R40, R40e */
 322            );                   /* all others */
 323
 324 TPACPI_HANDLE(hkey, ec, "\\_SB.HKEY",   /* 600e/x, 770e, 770x */
 325            "^HKEY",             /* R30, R31 */
 326            "HKEY",              /* all others */
 327            );                   /* 570 */
 328
 329 TPACPI_HANDLE(vid, root, "\\_SB.PCI.AGP.VGA",   /* 570 */
 330            "\\_SB.PCI0.AGP0.VID0",      /* 600e/x, 770x */
 331            "\\_SB.PCI0.VID0",   /* 770e */
 332            "\\_SB.PCI0.VID",    /* A21e, G4x, R50e, X30, X40 */
 333            "\\_SB.PCI0.AGP.VID",        /* all others */
 334            );                           /* R30, R31 */
 335
 336
 337 /*************************************************************************
 338  * ACPI helpers
 339  */
 340
 341 static int acpi_evalf(acpi_handle handle,
 342                       void *res, char *method, char *fmt, ...)
 343 {
 344         char *fmt0 = fmt;
 345         struct acpi_object_list params;
 346         union acpi_object in_objs[TPACPI_MAX_ACPI_ARGS];
 347         struct acpi_buffer result, *resultp;
 348         union acpi_object out_obj;
 349         acpi_status status;
 350         va_list ap;
 351         char res_type;
 352         int success;
 353         int quiet;
 354
 355         if (!*fmt) {
 356                 printk(TPACPI_ERR "acpi_evalf() called with empty format\n");
 357                 return 0;
 358         }
 359
 360         if (*fmt == 'q') {
 361                 quiet = 1;
 362                 fmt++;
 363         } else
 364                 quiet = 0;
 365
 366         res_type = *(fmt++);
 367
 368         params.count = 0;
 369         params.pointer = &in_objs[0];
 370
 371         va_start(ap, fmt);
 372         while (*fmt) {
 373                 char c = *(fmt++);
 374                 switch (c) {
 375                 case 'd':       /* int */
 376                         in_objs[params.count].integer.value = va_arg(ap, int);
 377                         in_objs[params.count++].type = ACPI_TYPE_INTEGER;
 378                         break;
 379                         /* add more types as needed */
 380                 default:
 381                         printk(TPACPI_ERR "acpi_evalf() called "
 382                                "with invalid format character '%c'\n", c);
 383                         return 0;
 384                 }
 385         }
 386         va_end(ap);
 387
 388         if (res_type != 'v') {
 389                 result.length = sizeof(out_obj);
 390                 result.pointer = &out_obj;
 391                 resultp = &result;
 392         } else
 393                 resultp = NULL;
 394
 395         status = acpi_evaluate_object(handle, method, &params, resultp);
 396
 397         switch (res_type) {
 398         case 'd':               /* int */
 399                 if (res)
 400                         *(int *)res = out_obj.integer.value;
 401                 success = status == AE_OK && out_obj.type == ACPI_TYPE_INTEGER;
 402                 break;
 403         case 'v':               /* void */
 404                 success = status == AE_OK;
 405                 break;
 406                 /* add more types as needed */
 407         default:
 408                 printk(TPACPI_ERR "acpi_evalf() called "
 409                        "with invalid format character '%c'\n", res_type);
 410                 return 0;
 411         }
 412
 413         if (!success && !quiet)
 414                 printk(TPACPI_ERR "acpi_evalf(%s, %s, ...) failed: %d\n",
 415                        method, fmt0, status);
 416
 417         return success;
 418 }
 419
 420 static int acpi_ec_read(int i, u8 *p)
 421 {
 422         int v;
 423
 424         if (ecrd_handle) {
 425                 if (!acpi_evalf(ecrd_handle, &v, NULL, "dd", i))
 426                         return 0;
 427                 *p = v;
 428         } else {
 429                 if (ec_read(i, p) < 0)
 430                         return 0;
 431         }
 432
 433         return 1;
 434 }
 435
 436 static int acpi_ec_write(int i, u8 v)
 437 {
 438         if (ecwr_handle) {
 439                 if (!acpi_evalf(ecwr_handle, NULL, NULL, "vdd", i, v))
 440                         return 0;
 441         } else {
 442                 if (ec_write(i, v) < 0)
 443                         return 0;
 444         }
 445
 446         return 1;
 447 }
 448
 449 #if defined(CONFIG_THINKPAD_ACPI_DOCK) || defined(CONFIG_THINKPAD_ACPI_BAY)
 450 static int _sta(acpi_handle handle)
 451 {
 452         int status;
 453
 454         if (!handle || !acpi_evalf(handle, &status, "_STA", "d"))
 455                 status = 0;
 456
 457         return status;
 458 }
 459 #endif
 460
 461 static int issue_thinkpad_cmos_command(int cmos_cmd)
 462 {
 463         if (!cmos_handle)
 464                 return -ENXIO;
 465
 466         if (!acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd))
 467                 return -EIO;
 468
 469         return 0;
 470 }
 471
 472 /*************************************************************************
 473  * ACPI device model
 474  */
 475
 476 #define TPACPI_ACPIHANDLE_INIT(object) \
 477         drv_acpi_handle_init(#object, &object##_handle, *object##_parent, \
 478                 object##_paths, ARRAY_SIZE(object##_paths), &object##_path)
 479
 480 static void drv_acpi_handle_init(char *name,
 481                            acpi_handle *handle, acpi_handle parent,
 482                            char **paths, int num_paths, char **path)
 483 {
 484         int i;
 485         acpi_status status;
 486
 487         vdbg_printk(TPACPI_DBG_INIT, "trying to locate ACPI handle for %s\n",
 488                 name);
 489
 490         for (i = 0; i < num_paths; i++) {
 491                 status = acpi_get_handle(parent, paths[i], handle);
 492                 if (ACPI_SUCCESS(status)) {
 493                         *path = paths[i];
 494                         dbg_printk(TPACPI_DBG_INIT,
 495                                    "Found ACPI handle %s for %s\n",
 496                                    *path, name);
 497                         return;
 498                 }
 499         }
 500
 501         vdbg_printk(TPACPI_DBG_INIT, "ACPI handle for %s not found\n",
 502                     name);
 503         *handle = NULL;
 504 }
 505
 506 static void dispatch_acpi_notify(acpi_handle handle, u32 event, void *data)
 507 {
 508         struct ibm_struct *ibm = data;
 509
 510         if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
 511                 return;
 512
 513         if (!ibm || !ibm->acpi || !ibm->acpi->notify)
 514                 return;
 515
 516         ibm->acpi->notify(ibm, event);
 517 }
 518
 519 static int __init setup_acpi_notify(struct ibm_struct *ibm)
 520 {
 521         acpi_status status;
 522         int rc;
 523
 524         BUG_ON(!ibm->acpi);
 525
 526         if (!*ibm->acpi->handle)
 527                 return 0;
 528
 529         vdbg_printk(TPACPI_DBG_INIT,
 530                 "setting up ACPI notify for %s\n", ibm->name);
 531
 532         rc = acpi_bus_get_device(*ibm->acpi->handle, &ibm->acpi->device);
 533         if (rc < 0) {
 534                 printk(TPACPI_ERR "acpi_bus_get_device(%s) failed: %d\n",
 535                         ibm->name, rc);
 536                 return -ENODEV;
 537         }
 538
 539         acpi_driver_data(ibm->acpi->device) = ibm;
 540         sprintf(acpi_device_class(ibm->acpi->device), "%s/%s",
 541                 TPACPI_ACPI_EVENT_PREFIX,
 542                 ibm->name);
 543
 544         status = acpi_install_notify_handler(*ibm->acpi->handle,
 545                         ibm->acpi->type, dispatch_acpi_notify, ibm);
 546         if (ACPI_FAILURE(status)) {
 547                 if (status == AE_ALREADY_EXISTS) {
 548                         printk(TPACPI_NOTICE
 549                                "another device driver is already "
 550                                "handling %s events\n", ibm->name);
 551                 } else {
 552                         printk(TPACPI_ERR
 553                                "acpi_install_notify_handler(%s) failed: %d\n",
 554                                ibm->name, status);
 555                 }
 556                 return -ENODEV;
 557         }
 558         ibm->flags.acpi_notify_installed = 1;
 559         return 0;
 560 }
 561
 562 static int __init tpacpi_device_add(struct acpi_device *device)
 563 {
 564         return 0;
 565 }
 566
 567 static int __init register_tpacpi_subdriver(struct ibm_struct *ibm)
 568 {
 569         int rc;
 570
 571         dbg_printk(TPACPI_DBG_INIT,
 572                 "registering %s as an ACPI driver\n", ibm->name);
 573
 574         BUG_ON(!ibm->acpi);
 575
 576         ibm->acpi->driver = kzalloc(sizeof(struct acpi_driver), GFP_KERNEL);
 577         if (!ibm->acpi->driver) {
 578                 printk(TPACPI_ERR "kzalloc(ibm->driver) failed\n");
 579                 return -ENOMEM;
 580         }
 581
 582         sprintf(ibm->acpi->driver->name, "%s_%s", TPACPI_NAME, ibm->name);
 583         ibm->acpi->driver->ids = ibm->acpi->hid;
 584
 585         ibm->acpi->driver->ops.add = &tpacpi_device_add;
 586
 587         rc = acpi_bus_register_driver(ibm->acpi->driver);
 588         if (rc < 0) {
 589                 printk(TPACPI_ERR "acpi_bus_register_driver(%s) failed: %d\n",
 590                        ibm->name, rc);
 591                 kfree(ibm->acpi->driver);
 592                 ibm->acpi->driver = NULL;
 593         } else if (!rc)
 594                 ibm->flags.acpi_driver_registered = 1;
 595
 596         return rc;
 597 }
 598
 599
 600 /****************************************************************************
 601  ****************************************************************************
 602  *
 603  * Procfs Helpers
 604  *
 605  ****************************************************************************
 606  ****************************************************************************/
 607
 608 static int dispatch_procfs_read(char *page, char **start, off_t off,
 609                         int count, int *eof, void *data)
 610 {
 611         struct ibm_struct *ibm = data;
 612         int len;
 613
 614         if (!ibm || !ibm->read)
 615                 return -EINVAL;
 616
 617         len = ibm->read(page);
 618         if (len < 0)
 619                 return len;
 620
 621         if (len <= off + count)
 622                 *eof = 1;
 623         *start = page + off;
 624         len -= off;
 625         if (len > count)
 626                 len = count;
 627         if (len < 0)
 628                 len = 0;
 629
 630         return len;
 631 }
 632
 633 static int dispatch_procfs_write(struct file *file,
 634                         const char __user *userbuf,
 635                         unsigned long count, void *data)
 636 {
 637         struct ibm_struct *ibm = data;
 638         char *kernbuf;
 639         int ret;
 640
 641         if (!ibm || !ibm->write)
 642                 return -EINVAL;
 643
 644         kernbuf = kmalloc(count + 2, GFP_KERNEL);
 645         if (!kernbuf)
 646                 return -ENOMEM;
 647
 648         if (copy_from_user(kernbuf, userbuf, count)) {
 649                 kfree(kernbuf);
 650                 return -EFAULT;
 651         }
 652
 653         kernbuf[count] = 0;
 654         strcat(kernbuf, ",");
 655         ret = ibm->write(kernbuf);
 656         if (ret == 0)
 657                 ret = count;
 658
 659         kfree(kernbuf);
 660
 661         return ret;
 662 }
 663
 664 static char *next_cmd(char **cmds)
 665 {
 666         char *start = *cmds;
 667         char *end;
 668
 669         while ((end = strchr(start, ',')) && end == start)
 670                 start = end + 1;
 671
 672         if (!end)
 673                 return NULL;
 674
 675         *end = 0;
 676         *cmds = end + 1;
 677         return start;
 678 }
 679
 680
 681 /****************************************************************************
 682  ****************************************************************************
 683  *
 684  * Device model: input, hwmon and platform
 685  *
 686  ****************************************************************************
 687  ****************************************************************************/
 688
 689 static struct platform_device *tpacpi_pdev;
 690 static struct platform_device *tpacpi_sensors_pdev;
 691 static struct device *tpacpi_hwmon;
 692 static struct input_dev *tpacpi_inputdev;
 693 static struct mutex tpacpi_inputdev_send_mutex;
 694 static LIST_HEAD(tpacpi_all_drivers);
 695
 696 static int tpacpi_suspend_handler(struct platform_device *pdev,
 697                                   pm_message_t state)
 698 {
 699         struct ibm_struct *ibm, *itmp;
 700
 701         list_for_each_entry_safe(ibm, itmp,
 702                                  &tpacpi_all_drivers,
 703                                  all_drivers) {
 704                 if (ibm->suspend)
 705                         (ibm->suspend)(state);
 706         }
 707
 708         return 0;
 709 }
 710
 711 static int tpacpi_resume_handler(struct platform_device *pdev)
 712 {
 713         struct ibm_struct *ibm, *itmp;
 714
 715         list_for_each_entry_safe(ibm, itmp,
 716                                  &tpacpi_all_drivers,
 717                                  all_drivers) {
 718                 if (ibm->resume)
 719                         (ibm->resume)();
 720         }
 721
 722         return 0;
 723 }
 724
 725 static struct platform_driver tpacpi_pdriver = {
 726         .driver = {
 727                 .name = TPACPI_DRVR_NAME,
 728                 .owner = THIS_MODULE,
 729         },
 730         .suspend = tpacpi_suspend_handler,
 731         .resume = tpacpi_resume_handler,
 732 };
 733
 734 static struct platform_driver tpacpi_hwmon_pdriver = {
 735         .driver = {
 736                 .name = TPACPI_HWMON_DRVR_NAME,
 737                 .owner = THIS_MODULE,
 738         },
 739 };
 740
 741 /*************************************************************************
 742  * sysfs support helpers
 743  */
 744
 745 struct attribute_set {
 746         unsigned int members, max_members;
 747         struct attribute_group group;
 748 };
 749
 750 struct attribute_set_obj {
 751         struct attribute_set s;
 752         struct attribute *a;
 753 } __attribute__((packed));
 754
 755 static struct attribute_set *create_attr_set(unsigned int max_members,
 756                                                 const char *name)
 757 {
 758         struct attribute_set_obj *sobj;
 759
 760         if (max_members == 0)
 761                 return NULL;
 762
 763         /* Allocates space for implicit NULL at the end too */
 764         sobj = kzalloc(sizeof(struct attribute_set_obj) +
 765                     max_members * sizeof(struct attribute *),
 766                     GFP_KERNEL);
 767         if (!sobj)
 768                 return NULL;
 769         sobj->s.max_members = max_members;
 770         sobj->s.group.attrs = &sobj->a;
 771         sobj->s.group.name = name;
 772
 773         return &sobj->s;
 774 }
 775
 776 #define destroy_attr_set(_set) \
 777         kfree(_set);
 778
 779 /* not multi-threaded safe, use it in a single thread per set */
 780 static int add_to_attr_set(struct attribute_set *s, struct attribute *attr)
 781 {
 782         if (!s || !attr)
 783                 return -EINVAL;
 784
 785         if (s->members >= s->max_members)
 786                 return -ENOMEM;
 787
 788         s->group.attrs[s->members] = attr;
 789         s->members++;
 790
 791         return 0;
 792 }
 793
 794 static int add_many_to_attr_set(struct attribute_set *s,
 795                         struct attribute **attr,
 796                         unsigned int count)
 797 {
 798         int i, res;
 799
 800         for (i = 0; i < count; i++) {
 801                 res = add_to_attr_set(s, attr[i]);
 802                 if (res)
 803                         return res;
 804         }
 805
 806         return 0;
 807 }
 808
 809 static void delete_attr_set(struct attribute_set *s, struct kobject *kobj)
 810 {
 811         sysfs_remove_group(kobj, &s->group);
 812         destroy_attr_set(s);
 813 }
 814
 815 #define register_attr_set_with_sysfs(_attr_set, _kobj) \
 816         sysfs_create_group(_kobj, &_attr_set->group)
 817
 818 static int parse_strtoul(const char *buf,
 819                 unsigned long max, unsigned long *value)
 820 {
 821         char *endp;
 822
 823         while (*buf && isspace(*buf))
 824                 buf++;
 825         *value = simple_strtoul(buf, &endp, 0);
 826         while (*endp && isspace(*endp))
 827                 endp++;
 828         if (*endp || *value > max)
 829                 return -EINVAL;
 830
 831         return 0;
 832 }
 833
 834 static int __init tpacpi_query_bcl_levels(acpi_handle handle)
 835 {
 836         struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
 837         union acpi_object *obj;
 838         int rc;
 839
 840         if (ACPI_SUCCESS(acpi_evaluate_object(handle, NULL, NULL, &buffer))) {
 841                 obj = (union acpi_object *)buffer.pointer;
 842                 if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) {
 843                         printk(TPACPI_ERR "Unknown _BCL data, "
 844                                "please report this to %s\n", TPACPI_MAIL);
 845                         rc = 0;
 846                 } else {
 847                         rc = obj->package.count;
 848                 }
 849         } else {
 850                 return 0;
 851         }
 852
 853         kfree(buffer.pointer);
 854         return rc;
 855 }
 856
 857 static acpi_status __init tpacpi_acpi_walk_find_bcl(acpi_handle handle,
 858                                         u32 lvl, void *context, void **rv)
 859 {
 860         char name[ACPI_PATH_SEGMENT_LENGTH];
 861         struct acpi_buffer buffer = { sizeof(name), &name };
 862
 863         if (ACPI_SUCCESS(acpi_get_name(handle, ACPI_SINGLE_NAME, &buffer)) &&
 864             !strncmp("_BCL", name, sizeof(name) - 1)) {
 865                 BUG_ON(!rv || !*rv);
 866                 **(int **)rv = tpacpi_query_bcl_levels(handle);
 867                 return AE_CTRL_TERMINATE;
 868         } else {
 869                 return AE_OK;
 870         }
 871 }
 872
 873 /*
 874  * Returns 0 (no ACPI _BCL or _BCL invalid), or size of brightness map
 875  */
 876 static int __init tpacpi_check_std_acpi_brightness_support(void)
 877 {
 878         int status;
 879         int bcl_levels = 0;
 880         void *bcl_ptr = &bcl_levels;
 881
 882         if (!vid_handle) {
 883                 TPACPI_ACPIHANDLE_INIT(vid);
 884         }
 885         if (!vid_handle)
 886                 return 0;
 887
 888         /*
 889          * Search for a _BCL method, and execute it.  This is safe on all
 890          * ThinkPads, and as a side-effect, _BCL will place a Lenovo Vista
 891          * BIOS in ACPI backlight control mode.  We do NOT have to care
 892          * about calling the _BCL method in an enabled video device, any
 893          * will do for our purposes.
 894          */
 895
 896         status = acpi_walk_namespace(ACPI_TYPE_METHOD, vid_handle, 3,
 897                                      tpacpi_acpi_walk_find_bcl, NULL,
 898                                      &bcl_ptr);
 899
 900         if (ACPI_SUCCESS(status) && bcl_levels > 2) {
 901                 tp_features.bright_acpimode = 1;
 902                 return (bcl_levels - 2);
 903         }
 904
 905         return 0;
 906 }
 907
 908 /*************************************************************************
 909  * thinkpad-acpi driver attributes
 910  */
 911
 912 /* interface_version --------------------------------------------------- */
 913 static ssize_t tpacpi_driver_interface_version_show(
 914                                 struct device_driver *drv,
 915                                 char *buf)
 916 {
 917         return snprintf(buf, PAGE_SIZE, "0x%08x\n", TPACPI_SYSFS_VERSION);
 918 }
 919
 920 static DRIVER_ATTR(interface_version, S_IRUGO,
 921                 tpacpi_driver_interface_version_show, NULL);
 922
 923 /* debug_level --------------------------------------------------------- */
 924 static ssize_t tpacpi_driver_debug_show(struct device_driver *drv,
 925                                                 char *buf)
 926 {
 927         return snprintf(buf, PAGE_SIZE, "0x%04x\n", dbg_level);
 928 }
 929
 930 static ssize_t tpacpi_driver_debug_store(struct device_driver *drv,
 931                                                 const char *buf, size_t count)
 932 {
 933         unsigned long t;
 934
 935         if (parse_strtoul(buf, 0xffff, &t))
 936                 return -EINVAL;
 937
 938         dbg_level = t;
 939
 940         return count;
 941 }
 942
 943 static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO,
 944                 tpacpi_driver_debug_show, tpacpi_driver_debug_store);
 945
 946 /* version ------------------------------------------------------------- */
 947 static ssize_t tpacpi_driver_version_show(struct device_driver *drv,
 948                                                 char *buf)
 949 {
 950         return snprintf(buf, PAGE_SIZE, "%s v%s\n",
 951                         TPACPI_DESC, TPACPI_VERSION);
 952 }
 953
 954 static DRIVER_ATTR(version, S_IRUGO,
 955                 tpacpi_driver_version_show, NULL);
 956
 957 /* --------------------------------------------------------------------- */
 958
 959 static struct driver_attribute *tpacpi_driver_attributes[] = {
 960         &driver_attr_debug_level, &driver_attr_version,
 961         &driver_attr_interface_version,
 962 };
 963
 964 static int __init tpacpi_create_driver_attributes(struct device_driver *drv)
 965 {
 966         int i, res;
 967
 968         i = 0;
 969         res = 0;
 970         while (!res && i < ARRAY_SIZE(tpacpi_driver_attributes)) {
 971                 res = driver_create_file(drv, tpacpi_driver_attributes[i]);
 972                 i++;
 973         }
 974
 975         return res;
 976 }
 977
 978 static void tpacpi_remove_driver_attributes(struct device_driver *drv)
 979 {
 980         int i;
 981
 982         for (i = 0; i < ARRAY_SIZE(tpacpi_driver_attributes); i++)
 983                 driver_remove_file(drv, tpacpi_driver_attributes[i]);
 984 }
 985
 986 /****************************************************************************
 987  ****************************************************************************
 988  *
 989  * Subdrivers
 990  *
 991  ****************************************************************************
 992  ****************************************************************************/
 993
 994 /*************************************************************************
 995  * thinkpad-acpi init subdriver
 996  */
 997
 998 static int __init thinkpad_acpi_driver_init(struct ibm_init_struct *iibm)
 999 {
1000         printk(TPACPI_INFO "%s v%s\n", TPACPI_DESC, TPACPI_VERSION);
1001         printk(TPACPI_INFO "%s\n", TPACPI_URL);
1002
1003         printk(TPACPI_INFO "ThinkPad BIOS %s, EC %s\n",
1004                 (thinkpad_id.bios_version_str) ?
1005                         thinkpad_id.bios_version_str : "unknown",
1006                 (thinkpad_id.ec_version_str) ?
1007                         thinkpad_id.ec_version_str : "unknown");
1008
1009         if (thinkpad_id.vendor && thinkpad_id.model_str)
1010                 printk(TPACPI_INFO "%s %s, model %s\n",
1011                         (thinkpad_id.vendor == PCI_VENDOR_ID_IBM) ?
1012                                 "IBM" : ((thinkpad_id.vendor ==
1013                                                 PCI_VENDOR_ID_LENOVO) ?
1014                                         "Lenovo" : "Unknown vendor"),
1015                         thinkpad_id.model_str,
1016                         (thinkpad_id.nummodel_str) ?
1017                                 thinkpad_id.nummodel_str : "unknown");
1018
1019         return 0;
1020 }
1021
1022 static int thinkpad_acpi_driver_read(char *p)
1023 {
1024         int len = 0;
1025
1026         len += sprintf(p + len, "driver:\t\t%s\n", TPACPI_DESC);
1027         len += sprintf(p + len, "version:\t%s\n", TPACPI_VERSION);
1028
1029         return len;
1030 }
1031
1032 static struct ibm_struct thinkpad_acpi_driver_data = {
1033         .name = "driver",
1034         .read = thinkpad_acpi_driver_read,
1035 };
1036
1037 /*************************************************************************
1038  * Hotkey subdriver
1039  */
1040
1041 enum {  /* hot key scan codes (derived from ACPI DSDT) */
1042         TP_ACPI_HOTKEYSCAN_FNF1         = 0,
1043         TP_ACPI_HOTKEYSCAN_FNF2,
1044         TP_ACPI_HOTKEYSCAN_FNF3,
1045         TP_ACPI_HOTKEYSCAN_FNF4,
1046         TP_ACPI_HOTKEYSCAN_FNF5,
1047         TP_ACPI_HOTKEYSCAN_FNF6,
1048         TP_ACPI_HOTKEYSCAN_FNF7,
1049         TP_ACPI_HOTKEYSCAN_FNF8,
1050         TP_ACPI_HOTKEYSCAN_FNF9,
1051         TP_ACPI_HOTKEYSCAN_FNF10,
1052         TP_ACPI_HOTKEYSCAN_FNF11,
1053         TP_ACPI_HOTKEYSCAN_FNF12,
1054         TP_ACPI_HOTKEYSCAN_FNBACKSPACE,
1055         TP_ACPI_HOTKEYSCAN_FNINSERT,
1056         TP_ACPI_HOTKEYSCAN_FNDELETE,
1057         TP_ACPI_HOTKEYSCAN_FNHOME,
1058         TP_ACPI_HOTKEYSCAN_FNEND,
1059         TP_ACPI_HOTKEYSCAN_FNPAGEUP,
1060         TP_ACPI_HOTKEYSCAN_FNPAGEDOWN,
1061         TP_ACPI_HOTKEYSCAN_FNSPACE,
1062         TP_ACPI_HOTKEYSCAN_VOLUMEUP,
1063         TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
1064         TP_ACPI_HOTKEYSCAN_MUTE,
1065         TP_ACPI_HOTKEYSCAN_THINKPAD,
1066 };
1067
1068 enum {  /* Keys available through NVRAM polling */
1069         TPACPI_HKEY_NVRAM_KNOWN_MASK = 0x00fb88c0U,
1070         TPACPI_HKEY_NVRAM_GOOD_MASK  = 0x00fb8000U,
1071 };
1072
1073 enum {  /* Positions of some of the keys in hotkey masks */
1074         TP_ACPI_HKEY_DISPSWTCH_MASK     = 1 << TP_ACPI_HOTKEYSCAN_FNF7,
1075         TP_ACPI_HKEY_DISPXPAND_MASK     = 1 << TP_ACPI_HOTKEYSCAN_FNF8,
1076         TP_ACPI_HKEY_HIBERNATE_MASK     = 1 << TP_ACPI_HOTKEYSCAN_FNF12,
1077         TP_ACPI_HKEY_BRGHTUP_MASK       = 1 << TP_ACPI_HOTKEYSCAN_FNHOME,
1078         TP_ACPI_HKEY_BRGHTDWN_MASK      = 1 << TP_ACPI_HOTKEYSCAN_FNEND,
1079         TP_ACPI_HKEY_THNKLGHT_MASK      = 1 << TP_ACPI_HOTKEYSCAN_FNPAGEUP,
1080         TP_ACPI_HKEY_ZOOM_MASK          = 1 << TP_ACPI_HOTKEYSCAN_FNSPACE,
1081         TP_ACPI_HKEY_VOLUP_MASK         = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEUP,
1082         TP_ACPI_HKEY_VOLDWN_MASK        = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
1083         TP_ACPI_HKEY_MUTE_MASK          = 1 << TP_ACPI_HOTKEYSCAN_MUTE,
1084         TP_ACPI_HKEY_THINKPAD_MASK      = 1 << TP_ACPI_HOTKEYSCAN_THINKPAD,
1085 };
1086
1087 enum {  /* NVRAM to ACPI HKEY group map */
1088         TP_NVRAM_HKEY_GROUP_HK2         = TP_ACPI_HKEY_THINKPAD_MASK |
1089                                           TP_ACPI_HKEY_ZOOM_MASK |
1090                                           TP_ACPI_HKEY_DISPSWTCH_MASK |
1091                                           TP_ACPI_HKEY_HIBERNATE_MASK,
1092         TP_NVRAM_HKEY_GROUP_BRIGHTNESS  = TP_ACPI_HKEY_BRGHTUP_MASK |
1093                                           TP_ACPI_HKEY_BRGHTDWN_MASK,
1094         TP_NVRAM_HKEY_GROUP_VOLUME      = TP_ACPI_HKEY_VOLUP_MASK |
1095                                           TP_ACPI_HKEY_VOLDWN_MASK |
1096                                           TP_ACPI_HKEY_MUTE_MASK,
1097 };
1098
1099 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1100 struct tp_nvram_state {
1101        u16 thinkpad_toggle:1;
1102        u16 zoom_toggle:1;
1103        u16 display_toggle:1;
1104        u16 thinklight_toggle:1;
1105        u16 hibernate_toggle:1;
1106        u16 displayexp_toggle:1;
1107        u16 display_state:1;
1108        u16 brightness_toggle:1;
1109        u16 volume_toggle:1;
1110        u16 mute:1;
1111
1112        u8 brightness_level;
1113        u8 volume_level;
1114 };
1115
1116 static struct task_struct *tpacpi_hotkey_task;
1117 static u32 hotkey_source_mask;          /* bit mask 0=ACPI,1=NVRAM */
1118 static int hotkey_poll_freq = 10;       /* Hz */
1119 static struct mutex hotkey_thread_mutex;
1120 static struct mutex hotkey_thread_data_mutex;
1121 static unsigned int hotkey_config_change;
1122
1123 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1124
1125 #define hotkey_source_mask 0U
1126
1127 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1128
1129 static struct mutex hotkey_mutex;
1130
1131 static enum {   /* Reasons for waking up */
1132         TP_ACPI_WAKEUP_NONE = 0,        /* None or unknown */
1133         TP_ACPI_WAKEUP_BAYEJ,           /* Bay ejection request */
1134         TP_ACPI_WAKEUP_UNDOCK,          /* Undock request */
1135 } hotkey_wakeup_reason;
1136
1137 static int hotkey_autosleep_ack;
1138
1139 static int hotkey_orig_status;
1140 static u32 hotkey_orig_mask;
1141 static u32 hotkey_all_mask;
1142 static u32 hotkey_reserved_mask;
1143 static u32 hotkey_mask;
1144
1145 static unsigned int hotkey_report_mode;
1146
1147 static u16 *hotkey_keycode_map;
1148
1149 static struct attribute_set *hotkey_dev_attributes;
1150
1151 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1152 #define HOTKEY_CONFIG_CRITICAL_START \
1153         do { \
1154                 mutex_lock(&hotkey_thread_data_mutex); \
1155                 hotkey_config_change++; \
1156         } while (0);
1157 #define HOTKEY_CONFIG_CRITICAL_END \
1158         mutex_unlock(&hotkey_thread_data_mutex);
1159 #else
1160 #define HOTKEY_CONFIG_CRITICAL_START
1161 #define HOTKEY_CONFIG_CRITICAL_END
1162 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1163
1164 /* HKEY.MHKG() return bits */
1165 #define TP_HOTKEY_TABLET_MASK (1 << 3)
1166
1167 static int hotkey_get_wlsw(int *status)
1168 {
1169         if (!acpi_evalf(hkey_handle, status, "WLSW", "d"))
1170                 return -EIO;
1171         return 0;
1172 }
1173
1174 static int hotkey_get_tablet_mode(int *status)
1175 {
1176         int s;
1177
1178         if (!acpi_evalf(hkey_handle, &s, "MHKG", "d"))
1179                 return -EIO;
1180
1181         *status = ((s & TP_HOTKEY_TABLET_MASK) != 0);
1182         return 0;
1183 }
1184
1185 /*
1186  * Call with hotkey_mutex held
1187  */
1188 static int hotkey_mask_get(void)
1189 {
1190         u32 m = 0;
1191
1192         if (tp_features.hotkey_mask) {
1193                 if (!acpi_evalf(hkey_handle, &m, "DHKN", "d"))
1194                         return -EIO;
1195         }
1196         hotkey_mask = m | (hotkey_source_mask & hotkey_mask);
1197
1198         return 0;
1199 }
1200
1201 /*
1202  * Call with hotkey_mutex held
1203  */
1204 static int hotkey_mask_set(u32 mask)
1205 {
1206         int i;
1207         int rc = 0;
1208
1209         if (tp_features.hotkey_mask) {
1210                 if (!tp_warned.hotkey_mask_ff &&
1211                     (mask == 0xffff || mask == 0xffffff ||
1212                      mask == 0xffffffff)) {
1213                         tp_warned.hotkey_mask_ff = 1;
1214                         printk(TPACPI_NOTICE
1215                                "setting the hotkey mask to 0x%08x is likely "
1216                                "not the best way to go about it\n", mask);
1217                         printk(TPACPI_NOTICE
1218                                "please consider using the driver defaults, "
1219                                "and refer to up-to-date thinkpad-acpi "
1220                                "documentation\n");
1221                 }
1222
1223                 HOTKEY_CONFIG_CRITICAL_START
1224                 for (i = 0; i < 32; i++) {
1225                         u32 m = 1 << i;
1226                         /* enable in firmware mask only keys not in NVRAM
1227                          * mode, but enable the key in the cached hotkey_mask
1228                          * regardless of mode, or the key will end up
1229                          * disabled by hotkey_mask_get() */
1230                         if (!acpi_evalf(hkey_handle,
1231                                         NULL, "MHKM", "vdd", i + 1,
1232                                         !!((mask & ~hotkey_source_mask) & m))) {
1233                                 rc = -EIO;
1234                                 break;
1235                         } else {
1236                                 hotkey_mask = (hotkey_mask & ~m) | (mask & m);
1237                         }
1238                 }
1239                 HOTKEY_CONFIG_CRITICAL_END
1240
1241                 /* hotkey_mask_get must be called unconditionally below */
1242                 if (!hotkey_mask_get() && !rc &&
1243                     (hotkey_mask & ~hotkey_source_mask) !=
1244                      (mask & ~hotkey_source_mask)) {
1245                         printk(TPACPI_NOTICE
1246                                "requested hot key mask 0x%08x, but "
1247                                "firmware forced it to 0x%08x\n",
1248                                mask, hotkey_mask);
1249                 }
1250         } else {
1251 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1252                 HOTKEY_CONFIG_CRITICAL_START
1253                 hotkey_mask = mask & hotkey_source_mask;
1254                 HOTKEY_CONFIG_CRITICAL_END
1255                 hotkey_mask_get();
1256                 if (hotkey_mask != mask) {
1257                         printk(TPACPI_NOTICE
1258                                "requested hot key mask 0x%08x, "
1259                                "forced to 0x%08x (NVRAM poll mask is "
1260                                "0x%08x): no firmware mask support\n",
1261                                mask, hotkey_mask, hotkey_source_mask);
1262                 }
1263 #else
1264                 hotkey_mask_get();
1265                 rc = -ENXIO;
1266 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1267         }
1268
1269         return rc;
1270 }
1271
1272 static int hotkey_status_get(int *status)
1273 {
1274         if (!acpi_evalf(hkey_handle, status, "DHKC", "d"))
1275                 return -EIO;
1276
1277         return 0;
1278 }
1279
1280 static int hotkey_status_set(int status)
1281 {
1282         if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", status))
1283                 return -EIO;
1284
1285         return 0;
1286 }
1287
1288 static void tpacpi_input_send_radiosw(void)
1289 {
1290         int wlsw;
1291
1292         if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&wlsw)) {
1293                 mutex_lock(&tpacpi_inputdev_send_mutex);
1294
1295                 input_report_switch(tpacpi_inputdev,
1296                                     SW_RFKILL_ALL, !!wlsw);
1297                 input_sync(tpacpi_inputdev);
1298
1299                 mutex_unlock(&tpacpi_inputdev_send_mutex);
1300         }
1301 }
1302
1303 static void tpacpi_input_send_tabletsw(void)
1304 {
1305         int state;
1306
1307         if (tp_features.hotkey_tablet &&
1308             !hotkey_get_tablet_mode(&state)) {
1309                 mutex_lock(&tpacpi_inputdev_send_mutex);
1310
1311                 input_report_switch(tpacpi_inputdev,
1312                                     SW_TABLET_MODE, !!state);
1313                 input_sync(tpacpi_inputdev);
1314
1315                 mutex_unlock(&tpacpi_inputdev_send_mutex);
1316         }
1317 }
1318
1319 static void tpacpi_input_send_key(unsigned int scancode)
1320 {
1321         unsigned int keycode;
1322
1323         keycode = hotkey_keycode_map[scancode];
1324
1325         if (keycode != KEY_RESERVED) {
1326                 mutex_lock(&tpacpi_inputdev_send_mutex);
1327
1328                 input_report_key(tpacpi_inputdev, keycode, 1);
1329                 if (keycode == KEY_UNKNOWN)
1330                         input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN,
1331                                     scancode);
1332                 input_sync(tpacpi_inputdev);
1333
1334                 input_report_key(tpacpi_inputdev, keycode, 0);
1335                 if (keycode == KEY_UNKNOWN)
1336                         input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN,
1337                                     scancode);
1338                 input_sync(tpacpi_inputdev);
1339
1340                 mutex_unlock(&tpacpi_inputdev_send_mutex);
1341         }
1342 }
1343
1344 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1345 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver;
1346
1347 static void tpacpi_hotkey_send_key(unsigned int scancode)
1348 {
1349         tpacpi_input_send_key(scancode);
1350         if (hotkey_report_mode < 2) {
1351                 acpi_bus_generate_proc_event(ibm_hotkey_acpidriver.device,
1352                                                 0x80, 0x1001 + scancode);
1353         }
1354 }
1355
1356 static void hotkey_read_nvram(struct tp_nvram_state *n, u32 m)
1357 {
1358         u8 d;
1359
1360         if (m & TP_NVRAM_HKEY_GROUP_HK2) {
1361                 d = nvram_read_byte(TP_NVRAM_ADDR_HK2);
1362                 n->thinkpad_toggle = !!(d & TP_NVRAM_MASK_HKT_THINKPAD);
1363                 n->zoom_toggle = !!(d & TP_NVRAM_MASK_HKT_ZOOM);
1364                 n->display_toggle = !!(d & TP_NVRAM_MASK_HKT_DISPLAY);
1365                 n->hibernate_toggle = !!(d & TP_NVRAM_MASK_HKT_HIBERNATE);
1366         }
1367         if (m & TP_ACPI_HKEY_THNKLGHT_MASK) {
1368                 d = nvram_read_byte(TP_NVRAM_ADDR_THINKLIGHT);
1369                 n->thinklight_toggle = !!(d & TP_NVRAM_MASK_THINKLIGHT);
1370         }
1371         if (m & TP_ACPI_HKEY_DISPXPAND_MASK) {
1372                 d = nvram_read_byte(TP_NVRAM_ADDR_VIDEO);
1373                 n->displayexp_toggle =
1374                                 !!(d & TP_NVRAM_MASK_HKT_DISPEXPND);
1375         }
1376         if (m & TP_NVRAM_HKEY_GROUP_BRIGHTNESS) {
1377                 d = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS);
1378                 n->brightness_level = (d & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
1379                                 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
1380                 n->brightness_toggle =
1381                                 !!(d & TP_NVRAM_MASK_HKT_BRIGHTNESS);
1382         }
1383         if (m & TP_NVRAM_HKEY_GROUP_VOLUME) {
1384                 d = nvram_read_byte(TP_NVRAM_ADDR_MIXER);
1385                 n->volume_level = (d & TP_NVRAM_MASK_LEVEL_VOLUME)
1386                                 >> TP_NVRAM_POS_LEVEL_VOLUME;
1387                 n->mute = !!(d & TP_NVRAM_MASK_MUTE);
1388                 n->volume_toggle = !!(d & TP_NVRAM_MASK_HKT_VOLUME);
1389         }
1390 }
1391
1392 #define TPACPI_COMPARE_KEY(__scancode, __member) \
1393         do { \
1394                 if ((mask & (1 << __scancode)) && \
1395                     oldn->__member != newn->__member) \
1396                 tpacpi_hotkey_send_key(__scancode); \
1397         } while (0)
1398
1399 #define TPACPI_MAY_SEND_KEY(__scancode) \
1400         do { if (mask & (1 << __scancode)) \
1401                 tpacpi_hotkey_send_key(__scancode); } while (0)
1402
1403 static void hotkey_compare_and_issue_event(struct tp_nvram_state *oldn,
1404                                            struct tp_nvram_state *newn,
1405                                            u32 mask)
1406 {
1407         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_THINKPAD, thinkpad_toggle);
1408         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNSPACE, zoom_toggle);
1409         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF7, display_toggle);
1410         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF12, hibernate_toggle);
1411
1412         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNPAGEUP, thinklight_toggle);
1413
1414         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF8, displayexp_toggle);
1415
1416         /* handle volume */
1417         if (oldn->volume_toggle != newn->volume_toggle) {
1418                 if (oldn->mute != newn->mute) {
1419                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE);
1420                 }
1421                 if (oldn->volume_level > newn->volume_level) {
1422                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
1423                 } else if (oldn->volume_level < newn->volume_level) {
1424                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
1425                 } else if (oldn->mute == newn->mute) {
1426                         /* repeated key presses that didn't change state */
1427                         if (newn->mute) {
1428                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE);
1429                         } else if (newn->volume_level != 0) {
1430                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
1431                         } else {
1432                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
1433                         }
1434                 }
1435         }
1436
1437         /* handle brightness */
1438         if (oldn->brightness_toggle != newn->brightness_toggle) {
1439                 if (oldn->brightness_level < newn->brightness_level) {
1440                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
1441                 } else if (oldn->brightness_level > newn->brightness_level) {
1442                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
1443                 } else {
1444                         /* repeated key presses that didn't change state */
1445                         if (newn->brightness_level != 0) {
1446                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
1447                         } else {
1448                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
1449                         }
1450                 }
1451         }
1452 }
1453
1454 #undef TPACPI_COMPARE_KEY
1455 #undef TPACPI_MAY_SEND_KEY
1456
1457 static int hotkey_kthread(void *data)
1458 {
1459         struct tp_nvram_state s[2];
1460         u32 mask;
1461         unsigned int si, so;
1462         unsigned long t;
1463         unsigned int change_detector, must_reset;
1464
1465         mutex_lock(&hotkey_thread_mutex);
1466
1467         if (tpacpi_lifecycle == TPACPI_LIFE_EXITING)
1468                 goto exit;
1469
1470         set_freezable();
1471
1472         so = 0;
1473         si = 1;
1474         t = 0;
1475
1476         /* Initial state for compares */
1477         mutex_lock(&hotkey_thread_data_mutex);
1478         change_detector = hotkey_config_change;
1479         mask = hotkey_source_mask & hotkey_mask;
1480         mutex_unlock(&hotkey_thread_data_mutex);
1481         hotkey_read_nvram(&s[so], mask);
1482
1483         while (!kthread_should_stop() && hotkey_poll_freq) {
1484                 if (t == 0)
1485                         t = 1000/hotkey_poll_freq;
1486                 t = msleep_interruptible(t);
1487                 if (unlikely(kthread_should_stop()))
1488                         break;
1489                 must_reset = try_to_freeze();
1490                 if (t > 0 && !must_reset)
1491                         continue;
1492
1493                 mutex_lock(&hotkey_thread_data_mutex);
1494                 if (must_reset || hotkey_config_change != change_detector) {
1495                         /* forget old state on thaw or config change */
1496                         si = so;
1497                         t = 0;
1498                         change_detector = hotkey_config_change;
1499                 }
1500                 mask = hotkey_source_mask & hotkey_mask;
1501                 mutex_unlock(&hotkey_thread_data_mutex);
1502
1503                 if (likely(mask)) {
1504                         hotkey_read_nvram(&s[si], mask);
1505                         if (likely(si != so)) {
1506                                 hotkey_compare_and_issue_event(&s[so], &s[si],
1507                                                                 mask);
1508                         }
1509                 }
1510
1511                 so = si;
1512                 si ^= 1;
1513         }
1514
1515 exit:
1516         mutex_unlock(&hotkey_thread_mutex);
1517         return 0;
1518 }
1519
1520 static void hotkey_poll_stop_sync(void)
1521 {
1522         if (tpacpi_hotkey_task) {
1523                 if (frozen(tpacpi_hotkey_task) ||
1524                     freezing(tpacpi_hotkey_task))
1525                         thaw_process(tpacpi_hotkey_task);
1526
1527                 kthread_stop(tpacpi_hotkey_task);
1528                 tpacpi_hotkey_task = NULL;
1529                 mutex_lock(&hotkey_thread_mutex);
1530                 /* at this point, the thread did exit */
1531                 mutex_unlock(&hotkey_thread_mutex);
1532         }
1533 }
1534
1535 /* call with hotkey_mutex held */
1536 static void hotkey_poll_setup(int may_warn)
1537 {
1538         if ((hotkey_source_mask & hotkey_mask) != 0 &&
1539             hotkey_poll_freq > 0 &&
1540             (tpacpi_inputdev->users > 0 || hotkey_report_mode < 2)) {
1541                 if (!tpacpi_hotkey_task) {
1542                         tpacpi_hotkey_task = kthread_run(hotkey_kthread,
1543                                         NULL, TPACPI_NVRAM_KTHREAD_NAME);
1544                         if (IS_ERR(tpacpi_hotkey_task)) {
1545                                 tpacpi_hotkey_task = NULL;
1546                                 printk(TPACPI_ERR
1547                                        "could not create kernel thread "
1548                                        "for hotkey polling\n");
1549                         }
1550                 }
1551         } else {
1552                 hotkey_poll_stop_sync();
1553                 if (may_warn &&
1554                     hotkey_source_mask != 0 && hotkey_poll_freq == 0) {
1555                         printk(TPACPI_NOTICE
1556                                 "hot keys 0x%08x require polling, "
1557                                 "which is currently disabled\n",
1558                                 hotkey_source_mask);
1559                 }
1560         }
1561 }
1562
1563 static void hotkey_poll_setup_safe(int may_warn)
1564 {
1565         mutex_lock(&hotkey_mutex);
1566         hotkey_poll_setup(may_warn);
1567         mutex_unlock(&hotkey_mutex);
1568 }
1569
1570 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1571
1572 static void hotkey_poll_setup_safe(int __unused)
1573 {
1574 }
1575
1576 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1577
1578 static int hotkey_inputdev_open(struct input_dev *dev)
1579 {
1580         switch (tpacpi_lifecycle) {
1581         case TPACPI_LIFE_INIT:
1582                 /*
1583                  * hotkey_init will call hotkey_poll_setup_safe
1584                  * at the appropriate moment
1585                  */
1586                 return 0;
1587         case TPACPI_LIFE_EXITING:
1588                 return -EBUSY;
1589         case TPACPI_LIFE_RUNNING:
1590                 hotkey_poll_setup_safe(0);
1591                 return 0;
1592         }
1593
1594         /* Should only happen if tpacpi_lifecycle is corrupt */
1595         BUG();
1596         return -EBUSY;
1597 }
1598
1599 static void hotkey_inputdev_close(struct input_dev *dev)
1600 {
1601         /* disable hotkey polling when possible */
1602         if (tpacpi_lifecycle == TPACPI_LIFE_RUNNING)
1603                 hotkey_poll_setup_safe(0);
1604 }
1605
1606 /* sysfs hotkey enable ------------------------------------------------- */
1607 static ssize_t hotkey_enable_show(struct device *dev,
1608                            struct device_attribute *attr,
1609                            char *buf)
1610 {
1611         int res, status;
1612
1613         res = hotkey_status_get(&status);
1614         if (res)
1615                 return res;
1616
1617         return snprintf(buf, PAGE_SIZE, "%d\n", status);
1618 }
1619
1620 static ssize_t hotkey_enable_store(struct device *dev,
1621                             struct device_attribute *attr,
1622                             const char *buf, size_t count)
1623 {
1624         unsigned long t;
1625         int res;
1626
1627         if (parse_strtoul(buf, 1, &t))
1628                 return -EINVAL;
1629
1630         res = hotkey_status_set(t);
1631
1632         return (res) ? res : count;
1633 }
1634
1635 static struct device_attribute dev_attr_hotkey_enable =
1636         __ATTR(hotkey_enable, S_IWUSR | S_IRUGO,
1637                 hotkey_enable_show, hotkey_enable_store);
1638
1639 /* sysfs hotkey mask --------------------------------------------------- */
1640 static ssize_t hotkey_mask_show(struct device *dev,
1641                            struct device_attribute *attr,
1642                            char *buf)
1643 {
1644         int res;
1645
1646         if (mutex_lock_interruptible(&hotkey_mutex))
1647                 return -ERESTARTSYS;
1648         res = hotkey_mask_get();
1649         mutex_unlock(&hotkey_mutex);
1650
1651         return (res)?
1652                 res : snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_mask);
1653 }
1654
1655 static ssize_t hotkey_mask_store(struct device *dev,
1656                             struct device_attribute *attr,
1657                             const char *buf, size_t count)
1658 {
1659         unsigned long t;
1660         int res;
1661
1662         if (parse_strtoul(buf, 0xffffffffUL, &t))
1663                 return -EINVAL;
1664
1665         if (mutex_lock_interruptible(&hotkey_mutex))
1666                 return -ERESTARTSYS;
1667
1668         res = hotkey_mask_set(t);
1669
1670 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1671         hotkey_poll_setup(1);
1672 #endif
1673
1674         mutex_unlock(&hotkey_mutex);
1675
1676         return (res) ? res : count;
1677 }
1678
1679 static struct device_attribute dev_attr_hotkey_mask =
1680         __ATTR(hotkey_mask, S_IWUSR | S_IRUGO,
1681                 hotkey_mask_show, hotkey_mask_store);
1682
1683 /* sysfs hotkey bios_enabled ------------------------------------------- */
1684 static ssize_t hotkey_bios_enabled_show(struct device *dev,
1685                            struct device_attribute *attr,
1686                            char *buf)
1687 {
1688         return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_orig_status);
1689 }
1690
1691 static struct device_attribute dev_attr_hotkey_bios_enabled =
1692         __ATTR(hotkey_bios_enabled, S_IRUGO, hotkey_bios_enabled_show, NULL);
1693
1694 /* sysfs hotkey bios_mask ---------------------------------------------- */
1695 static ssize_t hotkey_bios_mask_show(struct device *dev,
1696                            struct device_attribute *attr,
1697                            char *buf)
1698 {
1699         return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_orig_mask);
1700 }
1701
1702 static struct device_attribute dev_attr_hotkey_bios_mask =
1703         __ATTR(hotkey_bios_mask, S_IRUGO, hotkey_bios_mask_show, NULL);
1704
1705 /* sysfs hotkey all_mask ----------------------------------------------- */
1706 static ssize_t hotkey_all_mask_show(struct device *dev,
1707                            struct device_attribute *attr,
1708                            char *buf)
1709 {
1710         return snprintf(buf, PAGE_SIZE, "0x%08x\n",
1711                                 hotkey_all_mask | hotkey_source_mask);
1712 }
1713
1714 static struct device_attribute dev_attr_hotkey_all_mask =
1715         __ATTR(hotkey_all_mask, S_IRUGO, hotkey_all_mask_show, NULL);
1716
1717 /* sysfs hotkey recommended_mask --------------------------------------- */
1718 static ssize_t hotkey_recommended_mask_show(struct device *dev,
1719                                             struct device_attribute *attr,
1720                                             char *buf)
1721 {
1722         return snprintf(buf, PAGE_SIZE, "0x%08x\n",
1723                         (hotkey_all_mask | hotkey_source_mask)
1724                         & ~hotkey_reserved_mask);
1725 }
1726
1727 static struct device_attribute dev_attr_hotkey_recommended_mask =
1728         __ATTR(hotkey_recommended_mask, S_IRUGO,
1729                 hotkey_recommended_mask_show, NULL);
1730
1731 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1732
1733 /* sysfs hotkey hotkey_source_mask ------------------------------------- */
1734 static ssize_t hotkey_source_mask_show(struct device *dev,
1735                            struct device_attribute *attr,
1736                            char *buf)
1737 {
1738         return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_source_mask);
1739 }
1740
1741 static ssize_t hotkey_source_mask_store(struct device *dev,
1742                             struct device_attribute *attr,
1743                             const char *buf, size_t count)
1744 {
1745         unsigned long t;
1746
1747         if (parse_strtoul(buf, 0xffffffffUL, &t) ||
1748                 ((t & ~TPACPI_HKEY_NVRAM_KNOWN_MASK) != 0))
1749                 return -EINVAL;
1750
1751         if (mutex_lock_interruptible(&hotkey_mutex))
1752                 return -ERESTARTSYS;
1753
1754         HOTKEY_CONFIG_CRITICAL_START
1755         hotkey_source_mask = t;
1756         HOTKEY_CONFIG_CRITICAL_END
1757
1758         hotkey_poll_setup(1);
1759
1760         mutex_unlock(&hotkey_mutex);
1761
1762         return count;
1763 }
1764
1765 static struct device_attribute dev_attr_hotkey_source_mask =
1766         __ATTR(hotkey_source_mask, S_IWUSR | S_IRUGO,
1767                 hotkey_source_mask_show, hotkey_source_mask_store);
1768
1769 /* sysfs hotkey hotkey_poll_freq --------------------------------------- */
1770 static ssize_t hotkey_poll_freq_show(struct device *dev,
1771                            struct device_attribute *attr,
1772                            char *buf)
1773 {
1774         return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_poll_freq);
1775 }
1776
1777 static ssize_t hotkey_poll_freq_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, 25, &t))
1784                 return -EINVAL;
1785
1786         if (mutex_lock_interruptible(&hotkey_mutex))
1787                 return -ERESTARTSYS;
1788
1789         hotkey_poll_freq = t;
1790
1791         hotkey_poll_setup(1);
1792         mutex_unlock(&hotkey_mutex);
1793
1794         return count;
1795 }
1796
1797 static struct device_attribute dev_attr_hotkey_poll_freq =
1798         __ATTR(hotkey_poll_freq, S_IWUSR | S_IRUGO,
1799                 hotkey_poll_freq_show, hotkey_poll_freq_store);
1800
1801 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1802
1803 /* sysfs hotkey radio_sw (pollable) ------------------------------------ */
1804 static ssize_t hotkey_radio_sw_show(struct device *dev,
1805                            struct device_attribute *attr,
1806                            char *buf)
1807 {
1808         int res, s;
1809         res = hotkey_get_wlsw(&s);
1810         if (res < 0)
1811                 return res;
1812
1813         return snprintf(buf, PAGE_SIZE, "%d\n", !!s);
1814 }
1815
1816 static struct device_attribute dev_attr_hotkey_radio_sw =
1817         __ATTR(hotkey_radio_sw, S_IRUGO, hotkey_radio_sw_show, NULL);
1818
1819 static void hotkey_radio_sw_notify_change(void)
1820 {
1821         if (tp_features.hotkey_wlsw)
1822                 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
1823                              "hotkey_radio_sw");
1824 }
1825
1826 /* sysfs hotkey tablet mode (pollable) --------------------------------- */
1827 static ssize_t hotkey_tablet_mode_show(struct device *dev,
1828                            struct device_attribute *attr,
1829                            char *buf)
1830 {
1831         int res, s;
1832         res = hotkey_get_tablet_mode(&s);
1833         if (res < 0)
1834                 return res;
1835
1836         return snprintf(buf, PAGE_SIZE, "%d\n", !!s);
1837 }
1838
1839 static struct device_attribute dev_attr_hotkey_tablet_mode =
1840         __ATTR(hotkey_tablet_mode, S_IRUGO, hotkey_tablet_mode_show, NULL);
1841
1842 static void hotkey_tablet_mode_notify_change(void)
1843 {
1844         if (tp_features.hotkey_tablet)
1845                 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
1846                              "hotkey_tablet_mode");
1847 }
1848
1849 /* sysfs hotkey report_mode -------------------------------------------- */
1850 static ssize_t hotkey_report_mode_show(struct device *dev,
1851                            struct device_attribute *attr,
1852                            char *buf)
1853 {
1854         return snprintf(buf, PAGE_SIZE, "%d\n",
1855                 (hotkey_report_mode != 0) ? hotkey_report_mode : 1);
1856 }
1857
1858 static struct device_attribute dev_attr_hotkey_report_mode =
1859         __ATTR(hotkey_report_mode, S_IRUGO, hotkey_report_mode_show, NULL);
1860
1861 /* sysfs wakeup reason (pollable) -------------------------------------- */
1862 static ssize_t hotkey_wakeup_reason_show(struct device *dev,
1863                            struct device_attribute *attr,
1864                            char *buf)
1865 {
1866         return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_wakeup_reason);
1867 }
1868
1869 static struct device_attribute dev_attr_hotkey_wakeup_reason =
1870         __ATTR(wakeup_reason, S_IRUGO, hotkey_wakeup_reason_show, NULL);
1871
1872 static void hotkey_wakeup_reason_notify_change(void)
1873 {
1874         if (tp_features.hotkey_mask)
1875                 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
1876                              "wakeup_reason");
1877 }
1878
1879 /* sysfs wakeup hotunplug_complete (pollable) -------------------------- */
1880 static ssize_t hotkey_wakeup_hotunplug_complete_show(struct device *dev,
1881                            struct device_attribute *attr,
1882                            char *buf)
1883 {
1884         return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_autosleep_ack);
1885 }
1886
1887 static struct device_attribute dev_attr_hotkey_wakeup_hotunplug_complete =
1888         __ATTR(wakeup_hotunplug_complete, S_IRUGO,
1889                hotkey_wakeup_hotunplug_complete_show, NULL);
1890
1891 static void hotkey_wakeup_hotunplug_complete_notify_change(void)
1892 {
1893         if (tp_features.hotkey_mask)
1894                 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
1895                              "wakeup_hotunplug_complete");
1896 }
1897
1898 /* --------------------------------------------------------------------- */
1899
1900 static struct attribute *hotkey_attributes[] __initdata = {
1901         &dev_attr_hotkey_enable.attr,
1902         &dev_attr_hotkey_bios_enabled.attr,
1903         &dev_attr_hotkey_report_mode.attr,
1904 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1905         &dev_attr_hotkey_mask.attr,
1906         &dev_attr_hotkey_all_mask.attr,
1907         &dev_attr_hotkey_recommended_mask.attr,
1908         &dev_attr_hotkey_source_mask.attr,
1909         &dev_attr_hotkey_poll_freq.attr,
1910 #endif
1911 };
1912
1913 static struct attribute *hotkey_mask_attributes[] __initdata = {
1914         &dev_attr_hotkey_bios_mask.attr,
1915 #ifndef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1916         &dev_attr_hotkey_mask.attr,
1917         &dev_attr_hotkey_all_mask.attr,
1918         &dev_attr_hotkey_recommended_mask.attr,
1919 #endif
1920         &dev_attr_hotkey_wakeup_reason.attr,
1921         &dev_attr_hotkey_wakeup_hotunplug_complete.attr,
1922 };
1923
1924 static void hotkey_exit(void)
1925 {
1926 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1927         hotkey_poll_stop_sync();
1928 #endif
1929
1930         if (hotkey_dev_attributes)
1931                 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
1932
1933         kfree(hotkey_keycode_map);
1934
1935         if (tp_features.hotkey) {
1936                 dbg_printk(TPACPI_DBG_EXIT,
1937                            "restoring original hot key mask\n");
1938                 /* no short-circuit boolean operator below! */
1939                 if ((hotkey_mask_set(hotkey_orig_mask) |
1940                      hotkey_status_set(hotkey_orig_status)) != 0)
1941                         printk(TPACPI_ERR
1942                                "failed to restore hot key mask "
1943                                "to BIOS defaults\n");
1944         }
1945 }
1946
1947 static int __init hotkey_init(struct ibm_init_struct *iibm)
1948 {
1949         /* Requirements for changing the default keymaps:
1950          *
1951          * 1. Many of the keys are mapped to KEY_RESERVED for very
1952          *    good reasons.  Do not change them unless you have deep
1953          *    knowledge on the IBM and Lenovo ThinkPad firmware for
1954          *    the various ThinkPad models.  The driver behaves
1955          *    differently for KEY_RESERVED: such keys have their
1956          *    hot key mask *unset* in mask_recommended, and also
1957          *    in the initial hot key mask programmed into the
1958          *    firmware at driver load time, which means the firm-
1959          *    ware may react very differently if you change them to
1960          *    something else;
1961          *
1962          * 2. You must be subscribed to the linux-thinkpad and
1963          *    ibm-acpi-devel mailing lists, and you should read the
1964          *    list archives since 2007 if you want to change the
1965          *    keymaps.  This requirement exists so that you will
1966          *    know the past history of problems with the thinkpad-
1967          *    acpi driver keymaps, and also that you will be
1968          *    listening to any bug reports;
1969          *
1970          * 3. Do not send thinkpad-acpi specific patches directly to
1971          *    for merging, *ever*.  Send them to the linux-acpi
1972          *    mailinglist for comments.  Merging is to be done only
1973          *    through acpi-test and the ACPI maintainer.
1974          *
1975          * If the above is too much to ask, don't change the keymap.
1976          * Ask the thinkpad-acpi maintainer to do it, instead.
1977          */
1978         static u16 ibm_keycode_map[] __initdata = {
1979                 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
1980                 KEY_FN_F1,      KEY_FN_F2,      KEY_COFFEE,     KEY_SLEEP,
1981                 KEY_WLAN,       KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
1982                 KEY_FN_F9,      KEY_FN_F10,     KEY_FN_F11,     KEY_SUSPEND,
1983
1984                 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
1985                 KEY_UNKNOWN,    /* 0x0C: FN+BACKSPACE */
1986                 KEY_UNKNOWN,    /* 0x0D: FN+INSERT */
1987                 KEY_UNKNOWN,    /* 0x0E: FN+DELETE */
1988
1989                 /* brightness: firmware always reacts to them, unless
1990                  * X.org did some tricks in the radeon BIOS scratch
1991                  * registers of *some* models */
1992                 KEY_RESERVED,   /* 0x0F: FN+HOME (brightness up) */
1993                 KEY_RESERVED,   /* 0x10: FN+END (brightness down) */
1994
1995                 /* Thinklight: firmware always react to it */
1996                 KEY_RESERVED,   /* 0x11: FN+PGUP (thinklight toggle) */
1997
1998                 KEY_UNKNOWN,    /* 0x12: FN+PGDOWN */
1999                 KEY_ZOOM,       /* 0x13: FN+SPACE (zoom) */
2000
2001                 /* Volume: firmware always react to it and reprograms
2002                  * the built-in *extra* mixer.  Never map it to control
2003                  * another mixer by default. */
2004                 KEY_RESERVED,   /* 0x14: VOLUME UP */
2005                 KEY_RESERVED,   /* 0x15: VOLUME DOWN */
2006                 KEY_RESERVED,   /* 0x16: MUTE */
2007
2008                 KEY_VENDOR,     /* 0x17: Thinkpad/AccessIBM/Lenovo */
2009
2010                 /* (assignments unknown, please report if found) */
2011                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2012                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2013         };
2014         static u16 lenovo_keycode_map[] __initdata = {
2015                 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
2016                 KEY_FN_F1,      KEY_COFFEE,     KEY_BATTERY,    KEY_SLEEP,
2017                 KEY_WLAN,       KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
2018                 KEY_FN_F9,      KEY_FN_F10,     KEY_FN_F11,     KEY_SUSPEND,
2019
2020                 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
2021                 KEY_UNKNOWN,    /* 0x0C: FN+BACKSPACE */
2022                 KEY_UNKNOWN,    /* 0x0D: FN+INSERT */
2023                 KEY_UNKNOWN,    /* 0x0E: FN+DELETE */
2024
2025                 /* These either have to go through ACPI video, or
2026                  * act like in the IBM ThinkPads, so don't ever
2027                  * enable them by default */
2028                 KEY_RESERVED,   /* 0x0F: FN+HOME (brightness up) */
2029                 KEY_RESERVED,   /* 0x10: FN+END (brightness down) */
2030
2031                 KEY_RESERVED,   /* 0x11: FN+PGUP (thinklight toggle) */
2032
2033                 KEY_UNKNOWN,    /* 0x12: FN+PGDOWN */
2034                 KEY_ZOOM,       /* 0x13: FN+SPACE (zoom) */
2035
2036                 /* Volume: z60/z61, T60 (BIOS version?): firmware always
2037                  * react to it and reprograms the built-in *extra* mixer.
2038                  * Never map it to control another mixer by default.
2039                  *
2040                  * T60?, T61, R60?, R61: firmware and EC tries to send
2041                  * these over the regular keyboard, so these are no-ops,
2042                  * but there are still weird bugs re. MUTE, so do not
2043                  * change unless you get test reports from all Lenovo
2044                  * models.  May cause the BIOS to interfere with the
2045                  * HDA mixer.
2046                  */
2047                 KEY_RESERVED,   /* 0x14: VOLUME UP */
2048                 KEY_RESERVED,   /* 0x15: VOLUME DOWN */
2049                 KEY_RESERVED,   /* 0x16: MUTE */
2050
2051                 KEY_VENDOR,     /* 0x17: Thinkpad/AccessIBM/Lenovo */
2052
2053                 /* (assignments unknown, please report if found) */
2054                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2055                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2056         };
2057
2058 #define TPACPI_HOTKEY_MAP_LEN           ARRAY_SIZE(ibm_keycode_map)
2059 #define TPACPI_HOTKEY_MAP_SIZE          sizeof(ibm_keycode_map)
2060 #define TPACPI_HOTKEY_MAP_TYPESIZE      sizeof(ibm_keycode_map[0])
2061
2062         int res, i;
2063         int status;
2064         int hkeyv;
2065
2066         vdbg_printk(TPACPI_DBG_INIT, "initializing hotkey subdriver\n");
2067
2068         BUG_ON(!tpacpi_inputdev);
2069         BUG_ON(tpacpi_inputdev->open != NULL ||
2070                tpacpi_inputdev->close != NULL);
2071
2072         TPACPI_ACPIHANDLE_INIT(hkey);
2073         mutex_init(&hotkey_mutex);
2074
2075 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2076         mutex_init(&hotkey_thread_mutex);
2077         mutex_init(&hotkey_thread_data_mutex);
2078 #endif
2079
2080         /* hotkey not supported on 570 */
2081         tp_features.hotkey = hkey_handle != NULL;
2082
2083         vdbg_printk(TPACPI_DBG_INIT, "hotkeys are %s\n",
2084                 str_supported(tp_features.hotkey));
2085
2086         if (!tp_features.hotkey)
2087                 return 1;
2088
2089         hotkey_dev_attributes = create_attr_set(13, NULL);
2090         if (!hotkey_dev_attributes)
2091                 return -ENOMEM;
2092         res = add_many_to_attr_set(hotkey_dev_attributes,
2093                         hotkey_attributes,
2094                         ARRAY_SIZE(hotkey_attributes));
2095         if (res)
2096                 goto err_exit;
2097
2098         /* mask not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
2099            A30, R30, R31, T20-22, X20-21, X22-24.  Detected by checking
2100            for HKEY interface version 0x100 */
2101         if (acpi_evalf(hkey_handle, &hkeyv, "MHKV", "qd")) {
2102                 if ((hkeyv >> 8) != 1) {
2103                         printk(TPACPI_ERR "unknown version of the "
2104                                "HKEY interface: 0x%x\n", hkeyv);
2105                         printk(TPACPI_ERR "please report this to %s\n",
2106                                TPACPI_MAIL);
2107                 } else {
2108                         /*
2109                          * MHKV 0x100 in A31, R40, R40e,
2110                          * T4x, X31, and later
2111                          */
2112                         tp_features.hotkey_mask = 1;
2113                 }
2114         }
2115
2116         vdbg_printk(TPACPI_DBG_INIT, "hotkey masks are %s\n",
2117                 str_supported(tp_features.hotkey_mask));
2118
2119         if (tp_features.hotkey_mask) {
2120                 if (!acpi_evalf(hkey_handle, &hotkey_all_mask,
2121                                 "MHKA", "qd")) {
2122                         printk(TPACPI_ERR
2123                                "missing MHKA handler, "
2124                                "please report this to %s\n",
2125                                TPACPI_MAIL);
2126                         /* FN+F12, FN+F4, FN+F3 */
2127                         hotkey_all_mask = 0x080cU;
2128                 }
2129         }
2130
2131         /* hotkey_source_mask *must* be zero for
2132          * the first hotkey_mask_get */
2133         res = hotkey_status_get(&hotkey_orig_status);
2134         if (res)
2135                 goto err_exit;
2136
2137         if (tp_features.hotkey_mask) {
2138                 res = hotkey_mask_get();
2139                 if (res)
2140                         goto err_exit;
2141
2142                 hotkey_orig_mask = hotkey_mask;
2143                 res = add_many_to_attr_set(
2144                                 hotkey_dev_attributes,
2145                                 hotkey_mask_attributes,
2146                                 ARRAY_SIZE(hotkey_mask_attributes));
2147                 if (res)
2148                         goto err_exit;
2149         }
2150
2151 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2152         if (tp_features.hotkey_mask) {
2153                 hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK
2154                                         & ~hotkey_all_mask;
2155         } else {
2156                 hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK;
2157         }
2158
2159         vdbg_printk(TPACPI_DBG_INIT,
2160                     "hotkey source mask 0x%08x, polling freq %d\n",
2161                     hotkey_source_mask, hotkey_poll_freq);
2162 #endif
2163
2164         /* Not all thinkpads have a hardware radio switch */
2165         if (acpi_evalf(hkey_handle, &status, "WLSW", "qd")) {
2166                 tp_features.hotkey_wlsw = 1;
2167                 printk(TPACPI_INFO
2168                         "radio switch found; radios are %s\n",
2169                         enabled(status, 0));
2170                 res = add_to_attr_set(hotkey_dev_attributes,
2171                                 &dev_attr_hotkey_radio_sw.attr);
2172         }
2173
2174         /* For X41t, X60t, X61t Tablets... */
2175         if (!res && acpi_evalf(hkey_handle, &status, "MHKG", "qd")) {
2176                 tp_features.hotkey_tablet = 1;
2177                 printk(TPACPI_INFO
2178                         "possible tablet mode switch found; "
2179                         "ThinkPad in %s mode\n",
2180                         (status & TP_HOTKEY_TABLET_MASK)?
2181                                 "tablet" : "laptop");
2182                 res = add_to_attr_set(hotkey_dev_attributes,
2183                                 &dev_attr_hotkey_tablet_mode.attr);
2184         }
2185
2186         if (!res)
2187                 res = register_attr_set_with_sysfs(
2188                                 hotkey_dev_attributes,
2189                                 &tpacpi_pdev->dev.kobj);
2190         if (res)
2191                 goto err_exit;
2192
2193         /* Set up key map */
2194
2195         hotkey_keycode_map = kmalloc(TPACPI_HOTKEY_MAP_SIZE,
2196                                         GFP_KERNEL);
2197         if (!hotkey_keycode_map) {
2198                 printk(TPACPI_ERR
2199                         "failed to allocate memory for key map\n");
2200                 res = -ENOMEM;
2201                 goto err_exit;
2202         }
2203
2204         if (thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO) {
2205                 dbg_printk(TPACPI_DBG_INIT,
2206                            "using Lenovo default hot key map\n");
2207                 memcpy(hotkey_keycode_map, &lenovo_keycode_map,
2208                         TPACPI_HOTKEY_MAP_SIZE);
2209         } else {
2210                 dbg_printk(TPACPI_DBG_INIT,
2211                            "using IBM default hot key map\n");
2212                 memcpy(hotkey_keycode_map, &ibm_keycode_map,
2213                         TPACPI_HOTKEY_MAP_SIZE);
2214         }
2215
2216         set_bit(EV_KEY, tpacpi_inputdev->evbit);
2217         set_bit(EV_MSC, tpacpi_inputdev->evbit);
2218         set_bit(MSC_SCAN, tpacpi_inputdev->mscbit);
2219         tpacpi_inputdev->keycodesize = TPACPI_HOTKEY_MAP_TYPESIZE;
2220         tpacpi_inputdev->keycodemax = TPACPI_HOTKEY_MAP_LEN;
2221         tpacpi_inputdev->keycode = hotkey_keycode_map;
2222         for (i = 0; i < TPACPI_HOTKEY_MAP_LEN; i++) {
2223                 if (hotkey_keycode_map[i] != KEY_RESERVED) {
2224                         set_bit(hotkey_keycode_map[i],
2225                                 tpacpi_inputdev->keybit);
2226                 } else {
2227                         if (i < sizeof(hotkey_reserved_mask)*8)
2228                                 hotkey_reserved_mask |= 1 << i;
2229                 }
2230         }
2231
2232         if (tp_features.hotkey_wlsw) {
2233                 set_bit(EV_SW, tpacpi_inputdev->evbit);
2234                 set_bit(SW_RFKILL_ALL, tpacpi_inputdev->swbit);
2235         }
2236         if (tp_features.hotkey_tablet) {
2237                 set_bit(EV_SW, tpacpi_inputdev->evbit);
2238                 set_bit(SW_TABLET_MODE, tpacpi_inputdev->swbit);
2239         }
2240
2241         /* Do not issue duplicate brightness change events to
2242          * userspace */
2243         if (!tp_features.bright_acpimode)
2244                 /* update bright_acpimode... */
2245                 tpacpi_check_std_acpi_brightness_support();
2246
2247         if (tp_features.bright_acpimode) {
2248                 printk(TPACPI_INFO
2249                        "This ThinkPad has standard ACPI backlight "
2250                        "brightness control, supported by the ACPI "
2251                        "video driver\n");
2252                 printk(TPACPI_NOTICE
2253                        "Disabling thinkpad-acpi brightness events "
2254                        "by default...\n");
2255
2256                 /* The hotkey_reserved_mask change below is not
2257                  * necessary while the keys are at KEY_RESERVED in the
2258                  * default map, but better safe than sorry, leave it
2259                  * here as a marker of what we have to do, especially
2260                  * when we finally become able to set this at runtime
2261                  * on response to X.org requests */
2262                 hotkey_reserved_mask |=
2263                         (1 << TP_ACPI_HOTKEYSCAN_FNHOME)
2264                         | (1 << TP_ACPI_HOTKEYSCAN_FNEND);
2265         }
2266
2267         dbg_printk(TPACPI_DBG_INIT, "enabling hot key handling\n");
2268         res = hotkey_status_set(1);
2269         if (res) {
2270                 hotkey_exit();
2271                 return res;
2272         }
2273         res = hotkey_mask_set(((hotkey_all_mask | hotkey_source_mask)
2274                                 & ~hotkey_reserved_mask)
2275                                 | hotkey_orig_mask);
2276         if (res < 0 && res != -ENXIO) {
2277                 hotkey_exit();
2278                 return res;
2279         }
2280
2281         dbg_printk(TPACPI_DBG_INIT,
2282                         "legacy hot key reporting over procfs %s\n",
2283                         (hotkey_report_mode < 2) ?
2284                                 "enabled" : "disabled");
2285
2286         tpacpi_inputdev->open = &hotkey_inputdev_open;
2287         tpacpi_inputdev->close = &hotkey_inputdev_close;
2288
2289         hotkey_poll_setup_safe(1);
2290         tpacpi_input_send_radiosw();
2291         tpacpi_input_send_tabletsw();
2292
2293         return 0;
2294
2295 err_exit:
2296         delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
2297         hotkey_dev_attributes = NULL;
2298
2299         return (res < 0)? res : 1;
2300 }
2301
2302 static void hotkey_notify(struct ibm_struct *ibm, u32 event)
2303 {
2304         u32 hkey;
2305         unsigned int scancode;
2306         int send_acpi_ev;
2307         int ignore_acpi_ev;
2308         int unk_ev;
2309
2310         if (event != 0x80) {
2311                 printk(TPACPI_ERR
2312                        "unknown HKEY notification event %d\n", event);
2313                 /* forward it to userspace, maybe it knows how to handle it */
2314                 acpi_bus_generate_netlink_event(
2315                                         ibm->acpi->device->pnp.device_class,
2316                                         ibm->acpi->device->dev.bus_id,
2317                                         event, 0);
2318                 return;
2319         }
2320
2321         while (1) {
2322                 if (!acpi_evalf(hkey_handle, &hkey, "MHKP", "d")) {
2323                         printk(TPACPI_ERR "failed to retrieve HKEY event\n");
2324                         return;
2325                 }
2326
2327                 if (hkey == 0) {
2328                         /* queue empty */
2329                         return;
2330                 }
2331
2332                 send_acpi_ev = 1;
2333                 ignore_acpi_ev = 0;
2334                 unk_ev = 0;
2335
2336                 switch (hkey >> 12) {
2337                 case 1:
2338                         /* 0x1000-0x1FFF: key presses */
2339                         scancode = hkey & 0xfff;
2340                         if (scancode > 0 && scancode < 0x21) {
2341                                 scancode--;
2342                                 if (!(hotkey_source_mask & (1 << scancode))) {
2343                                         tpacpi_input_send_key(scancode);
2344                                         send_acpi_ev = 0;
2345                                 } else {
2346                                         ignore_acpi_ev = 1;
2347                                 }
2348                         } else {
2349                                 unk_ev = 1;
2350                         }
2351                         break;
2352                 case 2:
2353                         /* Wakeup reason */
2354                         switch (hkey) {
2355                         case 0x2304: /* suspend, undock */
2356                         case 0x2404: /* hibernation, undock */
2357                                 hotkey_wakeup_reason = TP_ACPI_WAKEUP_UNDOCK;
2358                                 ignore_acpi_ev = 1;
2359                                 break;
2360                         case 0x2305: /* suspend, bay eject */
2361                         case 0x2405: /* hibernation, bay eject */
2362                                 hotkey_wakeup_reason = TP_ACPI_WAKEUP_BAYEJ;
2363                                 ignore_acpi_ev = 1;
2364                                 break;
2365                         default:
2366                                 unk_ev = 1;
2367                         }
2368                         if (hotkey_wakeup_reason != TP_ACPI_WAKEUP_NONE) {
2369                                 printk(TPACPI_INFO
2370                                        "woke up due to a hot-unplug "
2371                                        "request...\n");
2372                                 hotkey_wakeup_reason_notify_change();
2373                         }
2374                         break;
2375                 case 3:
2376                         /* bay-related wakeups */
2377                         if (hkey == 0x3003) {
2378                                 hotkey_autosleep_ack = 1;
2379                                 printk(TPACPI_INFO
2380                                        "bay ejected\n");
2381                                 hotkey_wakeup_hotunplug_complete_notify_change();
2382                         } else {
2383                                 unk_ev = 1;
2384                         }
2385                         break;
2386                 case 4:
2387                         /* dock-related wakeups */
2388                         if (hkey == 0x4003) {
2389                                 hotkey_autosleep_ack = 1;
2390                                 printk(TPACPI_INFO
2391                                        "undocked\n");
2392                                 hotkey_wakeup_hotunplug_complete_notify_change();
2393                         } else {
2394                                 unk_ev = 1;
2395                         }
2396                         break;
2397                 case 5:
2398                         /* 0x5000-0x5FFF: human interface helpers */
2399                         switch (hkey) {
2400                         case 0x5010: /* Lenovo new BIOS: brightness changed */
2401                         case 0x500b: /* X61t: tablet pen inserted into bay */
2402                         case 0x500c: /* X61t: tablet pen removed from bay */
2403                                 break;
2404                         case 0x5009: /* X41t-X61t: swivel up (tablet mode) */
2405                         case 0x500a: /* X41t-X61t: swivel down (normal mode) */
2406                                 tpacpi_input_send_tabletsw();
2407                                 hotkey_tablet_mode_notify_change();
2408                                 send_acpi_ev = 0;
2409                                 break;
2410                         case 0x5001:
2411                         case 0x5002:
2412                                 /* LID switch events.  Do not propagate */
2413                                 ignore_acpi_ev = 1;
2414                                 break;
2415                         default:
2416                                 unk_ev = 1;
2417                         }
2418                         break;
2419                 case 7:
2420                         /* 0x7000-0x7FFF: misc */
2421                         if (tp_features.hotkey_wlsw && hkey == 0x7000) {
2422                                 tpacpi_input_send_radiosw();
2423                                 hotkey_radio_sw_notify_change();
2424                                 send_acpi_ev = 0;
2425                                 break;
2426                         }
2427                         /* fallthrough to default */
2428                 default:
2429                         unk_ev = 1;
2430                 }
2431                 if (unk_ev) {
2432                         printk(TPACPI_NOTICE
2433                                "unhandled HKEY event 0x%04x\n", hkey);
2434                 }
2435
2436                 /* Legacy events */
2437                 if (!ignore_acpi_ev &&
2438                     (send_acpi_ev || hotkey_report_mode < 2)) {
2439                         acpi_bus_generate_proc_event(ibm->acpi->device,
2440                                                      event, hkey);
2441                 }
2442
2443                 /* netlink events */
2444                 if (!ignore_acpi_ev && send_acpi_ev) {
2445                         acpi_bus_generate_netlink_event(
2446                                         ibm->acpi->device->pnp.device_class,
2447                                         ibm->acpi->device->dev.bus_id,
2448                                         event, hkey);
2449                 }
2450         }
2451 }
2452
2453 static void hotkey_suspend(pm_message_t state)
2454 {
2455         /* Do these on suspend, we get the events on early resume! */
2456         hotkey_wakeup_reason = TP_ACPI_WAKEUP_NONE;
2457         hotkey_autosleep_ack = 0;
2458 }
2459
2460 static void hotkey_resume(void)
2461 {
2462         if (hotkey_mask_get())
2463                 printk(TPACPI_ERR
2464                        "error while trying to read hot key mask "
2465                        "from firmware\n");
2466         tpacpi_input_send_radiosw();
2467         hotkey_radio_sw_notify_change();
2468         hotkey_tablet_mode_notify_change();
2469         hotkey_wakeup_reason_notify_change();
2470         hotkey_wakeup_hotunplug_complete_notify_change();
2471         hotkey_poll_setup_safe(0);
2472 }
2473
2474 /* procfs -------------------------------------------------------------- */
2475 static int hotkey_read(char *p)
2476 {
2477         int res, status;
2478         int len = 0;
2479
2480         if (!tp_features.hotkey) {
2481                 len += sprintf(p + len, "status:\t\tnot supported\n");
2482                 return len;
2483         }
2484
2485         if (mutex_lock_interruptible(&hotkey_mutex))
2486                 return -ERESTARTSYS;
2487         res = hotkey_status_get(&status);
2488         if (!res)
2489                 res = hotkey_mask_get();
2490         mutex_unlock(&hotkey_mutex);
2491         if (res)
2492                 return res;
2493
2494         len += sprintf(p + len, "status:\t\t%s\n", enabled(status, 0));
2495         if (tp_features.hotkey_mask) {
2496                 len += sprintf(p + len, "mask:\t\t0x%08x\n", hotkey_mask);
2497                 len += sprintf(p + len,
2498                                "commands:\tenable, disable, reset, <mask>\n");
2499         } else {
2500                 len += sprintf(p + len, "mask:\t\tnot supported\n");
2501                 len += sprintf(p + len, "commands:\tenable, disable, reset\n");
2502         }
2503
2504         return len;
2505 }
2506
2507 static int hotkey_write(char *buf)
2508 {
2509         int res, status;
2510         u32 mask;
2511         char *cmd;
2512
2513         if (!tp_features.hotkey)
2514                 return -ENODEV;
2515
2516         if (mutex_lock_interruptible(&hotkey_mutex))
2517                 return -ERESTARTSYS;
2518
2519         status = -1;
2520         mask = hotkey_mask;
2521
2522         res = 0;
2523         while ((cmd = next_cmd(&buf))) {
2524                 if (strlencmp(cmd, "enable") == 0) {
2525                         status = 1;
2526                 } else if (strlencmp(cmd, "disable") == 0) {
2527                         status = 0;
2528                 } else if (strlencmp(cmd, "reset") == 0) {
2529                         status = hotkey_orig_status;
2530                         mask = hotkey_orig_mask;
2531                 } else if (sscanf(cmd, "0x%x", &mask) == 1) {
2532                         /* mask set */
2533                 } else if (sscanf(cmd, "%x", &mask) == 1) {
2534                         /* mask set */
2535                 } else {
2536                         res = -EINVAL;
2537                         goto errexit;
2538                 }
2539         }
2540         if (status != -1)
2541                 res = hotkey_status_set(status);
2542
2543         if (!res && mask != hotkey_mask)
2544                 res = hotkey_mask_set(mask);
2545
2546 errexit:
2547         mutex_unlock(&hotkey_mutex);
2548         return res;
2549 }
2550
2551 static const struct acpi_device_id ibm_htk_device_ids[] = {
2552         {TPACPI_ACPI_HKEY_HID, 0},
2553         {"", 0},
2554 };
2555
2556 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver = {
2557         .hid = ibm_htk_device_ids,
2558         .notify = hotkey_notify,
2559         .handle = &hkey_handle,
2560         .type = ACPI_DEVICE_NOTIFY,
2561 };
2562
2563 static struct ibm_struct hotkey_driver_data = {
2564         .name = "hotkey",
2565         .read = hotkey_read,
2566         .write = hotkey_write,
2567         .exit = hotkey_exit,
2568         .resume = hotkey_resume,
2569         .suspend = hotkey_suspend,
2570         .acpi = &ibm_hotkey_acpidriver,
2571 };
2572
2573 /*************************************************************************
2574  * Bluetooth subdriver
2575  */
2576
2577 enum {
2578         /* ACPI GBDC/SBDC bits */
2579         TP_ACPI_BLUETOOTH_HWPRESENT     = 0x01, /* Bluetooth hw available */
2580         TP_ACPI_BLUETOOTH_RADIOSSW      = 0x02, /* Bluetooth radio enabled */
2581         TP_ACPI_BLUETOOTH_UNK           = 0x04, /* unknown function */
2582 };
2583
2584 static int bluetooth_get_radiosw(void);
2585 static int bluetooth_set_radiosw(int radio_on);
2586
2587 /* sysfs bluetooth enable ---------------------------------------------- */
2588 static ssize_t bluetooth_enable_show(struct device *dev,
2589                            struct device_attribute *attr,
2590                            char *buf)
2591 {
2592         int status;
2593
2594         status = bluetooth_get_radiosw();
2595         if (status < 0)
2596                 return status;
2597
2598         return snprintf(buf, PAGE_SIZE, "%d\n", status ? 1 : 0);
2599 }
2600
2601 static ssize_t bluetooth_enable_store(struct device *dev,
2602                             struct device_attribute *attr,
2603                             const char *buf, size_t count)
2604 {
2605         unsigned long t;
2606         int res;
2607
2608         if (parse_strtoul(buf, 1, &t))
2609                 return -EINVAL;
2610
2611         res = bluetooth_set_radiosw(t);
2612
2613         return (res) ? res : count;
2614 }
2615
2616 static struct device_attribute dev_attr_bluetooth_enable =
2617         __ATTR(bluetooth_enable, S_IWUSR | S_IRUGO,
2618                 bluetooth_enable_show, bluetooth_enable_store);
2619
2620 /* --------------------------------------------------------------------- */
2621
2622 static struct attribute *bluetooth_attributes[] = {
2623         &dev_attr_bluetooth_enable.attr,
2624         NULL
2625 };
2626
2627 static const struct attribute_group bluetooth_attr_group = {
2628         .attrs = bluetooth_attributes,
2629 };
2630
2631 static int __init bluetooth_init(struct ibm_init_struct *iibm)
2632 {
2633         int res;
2634         int status = 0;
2635
2636         vdbg_printk(TPACPI_DBG_INIT, "initializing bluetooth subdriver\n");
2637
2638         TPACPI_ACPIHANDLE_INIT(hkey);
2639
2640         /* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
2641            G4x, R30, R31, R40e, R50e, T20-22, X20-21 */
2642         tp_features.bluetooth = hkey_handle &&
2643             acpi_evalf(hkey_handle, &status, "GBDC", "qd");
2644
2645         vdbg_printk(TPACPI_DBG_INIT, "bluetooth is %s, status 0x%02x\n",
2646                 str_supported(tp_features.bluetooth),
2647                 status);
2648
2649         if (tp_features.bluetooth) {
2650                 if (!(status & TP_ACPI_BLUETOOTH_HWPRESENT)) {
2651                         /* no bluetooth hardware present in system */
2652                         tp_features.bluetooth = 0;
2653                         dbg_printk(TPACPI_DBG_INIT,
2654                                    "bluetooth hardware not installed\n");
2655                 } else {
2656                         res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
2657                                         &bluetooth_attr_group);
2658                         if (res)
2659                                 return res;
2660                 }
2661         }
2662
2663         return (tp_features.bluetooth)? 0 : 1;
2664 }
2665
2666 static void bluetooth_exit(void)
2667 {
2668         sysfs_remove_group(&tpacpi_pdev->dev.kobj,
2669                         &bluetooth_attr_group);
2670 }
2671
2672 static int bluetooth_get_radiosw(void)
2673 {
2674         int status;
2675
2676         if (!tp_features.bluetooth)
2677                 return -ENODEV;
2678
2679         if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
2680                 return -EIO;
2681
2682         return ((status & TP_ACPI_BLUETOOTH_RADIOSSW) != 0);
2683 }
2684
2685 static int bluetooth_set_radiosw(int radio_on)
2686 {
2687         int status;
2688
2689         if (!tp_features.bluetooth)
2690                 return -ENODEV;
2691
2692         if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
2693                 return -EIO;
2694         if (radio_on)
2695                 status |= TP_ACPI_BLUETOOTH_RADIOSSW;
2696         else
2697                 status &= ~TP_ACPI_BLUETOOTH_RADIOSSW;
2698         if (!acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status))
2699                 return -EIO;
2700
2701         return 0;
2702 }
2703
2704 /* procfs -------------------------------------------------------------- */
2705 static int bluetooth_read(char *p)
2706 {
2707         int len = 0;
2708         int status = bluetooth_get_radiosw();
2709
2710         if (!tp_features.bluetooth)
2711                 len += sprintf(p + len, "status:\t\tnot supported\n");
2712         else {
2713                 len += sprintf(p + len, "status:\t\t%s\n",
2714                                 (status)? "enabled" : "disabled");
2715                 len += sprintf(p + len, "commands:\tenable, disable\n");
2716         }
2717
2718         return len;
2719 }
2720
2721 static int bluetooth_write(char *buf)
2722 {
2723         char *cmd;
2724
2725         if (!tp_features.bluetooth)
2726                 return -ENODEV;
2727
2728         while ((cmd = next_cmd(&buf))) {
2729                 if (strlencmp(cmd, "enable") == 0) {
2730                         bluetooth_set_radiosw(1);
2731                 } else if (strlencmp(cmd, "disable") == 0) {
2732                         bluetooth_set_radiosw(0);
2733                 } else
2734                         return -EINVAL;
2735         }
2736
2737         return 0;
2738 }
2739
2740 static struct ibm_struct bluetooth_driver_data = {
2741         .name = "bluetooth",
2742         .read = bluetooth_read,
2743         .write = bluetooth_write,
2744         .exit = bluetooth_exit,
2745 };
2746
2747 /*************************************************************************
2748  * Wan subdriver
2749  */
2750
2751 enum {
2752         /* ACPI GWAN/SWAN bits */
2753         TP_ACPI_WANCARD_HWPRESENT       = 0x01, /* Wan hw available */
2754         TP_ACPI_WANCARD_RADIOSSW        = 0x02, /* Wan radio enabled */
2755         TP_ACPI_WANCARD_UNK             = 0x04, /* unknown function */
2756 };
2757
2758 static int wan_get_radiosw(void);
2759 static int wan_set_radiosw(int radio_on);
2760
2761 /* sysfs wan enable ---------------------------------------------------- */
2762 static ssize_t wan_enable_show(struct device *dev,
2763                            struct device_attribute *attr,
2764                            char *buf)
2765 {
2766         int status;
2767
2768         status = wan_get_radiosw();
2769         if (status < 0)
2770                 return status;
2771
2772         return snprintf(buf, PAGE_SIZE, "%d\n", status ? 1 : 0);
2773 }
2774
2775 static ssize_t wan_enable_store(struct device *dev,
2776                             struct device_attribute *attr,
2777                             const char *buf, size_t count)
2778 {
2779         unsigned long t;
2780         int res;
2781
2782         if (parse_strtoul(buf, 1, &t))
2783                 return -EINVAL;
2784
2785         res = wan_set_radiosw(t);
2786
2787         return (res) ? res : count;
2788 }
2789
2790 static struct device_attribute dev_attr_wan_enable =
2791         __ATTR(wwan_enable, S_IWUSR | S_IRUGO,
2792                 wan_enable_show, wan_enable_store);
2793
2794 /* --------------------------------------------------------------------- */
2795
2796 static struct attribute *wan_attributes[] = {
2797         &dev_attr_wan_enable.attr,
2798         NULL
2799 };
2800
2801 static const struct attribute_group wan_attr_group = {
2802         .attrs = wan_attributes,
2803 };
2804
2805 static int __init wan_init(struct ibm_init_struct *iibm)
2806 {
2807         int res;
2808         int status = 0;
2809
2810         vdbg_printk(TPACPI_DBG_INIT, "initializing wan subdriver\n");
2811
2812         TPACPI_ACPIHANDLE_INIT(hkey);
2813
2814         tp_features.wan = hkey_handle &&
2815             acpi_evalf(hkey_handle, &status, "GWAN", "qd");
2816
2817         vdbg_printk(TPACPI_DBG_INIT, "wan is %s, status 0x%02x\n",
2818                 str_supported(tp_features.wan),
2819                 status);
2820
2821         if (tp_features.wan) {
2822                 if (!(status & TP_ACPI_WANCARD_HWPRESENT)) {
2823                         /* no wan hardware present in system */
2824                         tp_features.wan = 0;
2825                         dbg_printk(TPACPI_DBG_INIT,
2826                                    "wan hardware not installed\n");
2827                 } else {
2828                         res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
2829                                         &wan_attr_group);
2830                         if (res)
2831                                 return res;
2832                 }
2833         }
2834
2835         return (tp_features.wan)? 0 : 1;
2836 }
2837
2838 static void wan_exit(void)
2839 {
2840         sysfs_remove_group(&tpacpi_pdev->dev.kobj,
2841                 &wan_attr_group);
2842 }
2843
2844 static int wan_get_radiosw(void)
2845 {
2846         int status;
2847
2848         if (!tp_features.wan)
2849                 return -ENODEV;
2850
2851         if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
2852                 return -EIO;
2853
2854         return ((status & TP_ACPI_WANCARD_RADIOSSW) != 0);
2855 }
2856
2857 static int wan_set_radiosw(int radio_on)
2858 {
2859         int status;
2860
2861         if (!tp_features.wan)
2862                 return -ENODEV;
2863
2864         if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
2865                 return -EIO;
2866         if (radio_on)
2867                 status |= TP_ACPI_WANCARD_RADIOSSW;
2868         else
2869                 status &= ~TP_ACPI_WANCARD_RADIOSSW;
2870         if (!acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status))
2871                 return -EIO;
2872
2873         return 0;
2874 }
2875
2876 /* procfs -------------------------------------------------------------- */
2877 static int wan_read(char *p)
2878 {
2879         int len = 0;
2880         int status = wan_get_radiosw();
2881
2882         if (!tp_features.wan)
2883                 len += sprintf(p + len, "status:\t\tnot supported\n");
2884         else {
2885                 len += sprintf(p + len, "status:\t\t%s\n",
2886                                 (status)? "enabled" : "disabled");
2887                 len += sprintf(p + len, "commands:\tenable, disable\n");
2888         }
2889
2890         return len;
2891 }
2892
2893 static int wan_write(char *buf)
2894 {
2895         char *cmd;
2896
2897         if (!tp_features.wan)
2898                 return -ENODEV;
2899
2900         while ((cmd = next_cmd(&buf))) {
2901                 if (strlencmp(cmd, "enable") == 0) {
2902                         wan_set_radiosw(1);
2903                 } else if (strlencmp(cmd, "disable") == 0) {
2904                         wan_set_radiosw(0);
2905                 } else
2906                         return -EINVAL;
2907         }
2908
2909         return 0;
2910 }
2911
2912 static struct ibm_struct wan_driver_data = {
2913         .name = "wan",
2914         .read = wan_read,
2915         .write = wan_write,
2916         .exit = wan_exit,
2917         .flags.experimental = 1,
2918 };
2919
2920 /*************************************************************************
2921  * Video subdriver
2922  */
2923
2924 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
2925
2926 enum video_access_mode {
2927         TPACPI_VIDEO_NONE = 0,
2928         TPACPI_VIDEO_570,       /* 570 */
2929         TPACPI_VIDEO_770,       /* 600e/x, 770e, 770x */
2930         TPACPI_VIDEO_NEW,       /* all others */
2931 };
2932
2933 enum {  /* video status flags, based on VIDEO_570 */
2934         TP_ACPI_VIDEO_S_LCD = 0x01,     /* LCD output enabled */
2935         TP_ACPI_VIDEO_S_CRT = 0x02,     /* CRT output enabled */
2936         TP_ACPI_VIDEO_S_DVI = 0x08,     /* DVI output enabled */
2937 };
2938
2939 enum {  /* TPACPI_VIDEO_570 constants */
2940         TP_ACPI_VIDEO_570_PHSCMD = 0x87,        /* unknown magic constant :( */
2941         TP_ACPI_VIDEO_570_PHSMASK = 0x03,       /* PHS bits that map to
2942                                                  * video_status_flags */
2943         TP_ACPI_VIDEO_570_PHS2CMD = 0x8b,       /* unknown magic constant :( */
2944         TP_ACPI_VIDEO_570_PHS2SET = 0x80,       /* unknown magic constant :( */
2945 };
2946
2947 static enum video_access_mode video_supported;
2948 static int video_orig_autosw;
2949
2950 static int video_autosw_get(void);
2951 static int video_autosw_set(int enable);
2952
2953 TPACPI_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID");       /* G41 */
2954
2955 static int __init video_init(struct ibm_init_struct *iibm)
2956 {
2957         int ivga;
2958
2959         vdbg_printk(TPACPI_DBG_INIT, "initializing video subdriver\n");
2960
2961         TPACPI_ACPIHANDLE_INIT(vid);
2962         TPACPI_ACPIHANDLE_INIT(vid2);
2963
2964         if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga)
2965                 /* G41, assume IVGA doesn't change */
2966                 vid_handle = vid2_handle;
2967
2968         if (!vid_handle)
2969                 /* video switching not supported on R30, R31 */
2970                 video_supported = TPACPI_VIDEO_NONE;
2971         else if (acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd"))
2972                 /* 570 */
2973                 video_supported = TPACPI_VIDEO_570;
2974         else if (acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd"))
2975                 /* 600e/x, 770e, 770x */
2976                 video_supported = TPACPI_VIDEO_770;
2977         else
2978                 /* all others */
2979                 video_supported = TPACPI_VIDEO_NEW;
2980
2981         vdbg_printk(TPACPI_DBG_INIT, "video is %s, mode %d\n",
2982                 str_supported(video_supported != TPACPI_VIDEO_NONE),
2983                 video_supported);
2984
2985         return (video_supported != TPACPI_VIDEO_NONE)? 0 : 1;
2986 }
2987
2988 static void video_exit(void)
2989 {
2990         dbg_printk(TPACPI_DBG_EXIT,
2991                    "restoring original video autoswitch mode\n");
2992         if (video_autosw_set(video_orig_autosw))
2993                 printk(TPACPI_ERR "error while trying to restore original "
2994                         "video autoswitch mode\n");
2995 }
2996
2997 static int video_outputsw_get(void)
2998 {
2999         int status = 0;
3000         int i;
3001
3002         switch (video_supported) {
3003         case TPACPI_VIDEO_570:
3004                 if (!acpi_evalf(NULL, &i, "\\_SB.PHS", "dd",
3005                                  TP_ACPI_VIDEO_570_PHSCMD))
3006                         return -EIO;
3007                 status = i & TP_ACPI_VIDEO_570_PHSMASK;
3008                 break;
3009         case TPACPI_VIDEO_770:
3010                 if (!acpi_evalf(NULL, &i, "\\VCDL", "d"))
3011                         return -EIO;
3012                 if (i)
3013                         status |= TP_ACPI_VIDEO_S_LCD;
3014                 if (!acpi_evalf(NULL, &i, "\\VCDC", "d"))
3015                         return -EIO;
3016                 if (i)
3017                         status |= TP_ACPI_VIDEO_S_CRT;
3018                 break;
3019         case TPACPI_VIDEO_NEW:
3020                 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1) ||
3021                     !acpi_evalf(NULL, &i, "\\VCDC", "d"))
3022                         return -EIO;
3023                 if (i)
3024                         status |= TP_ACPI_VIDEO_S_CRT;
3025
3026                 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0) ||
3027                     !acpi_evalf(NULL, &i, "\\VCDL", "d"))
3028                         return -EIO;
3029                 if (i)
3030                         status |= TP_ACPI_VIDEO_S_LCD;
3031                 if (!acpi_evalf(NULL, &i, "\\VCDD", "d"))
3032                         return -EIO;
3033                 if (i)
3034                         status |= TP_ACPI_VIDEO_S_DVI;
3035                 break;
3036         default:
3037                 return -ENOSYS;
3038         }
3039
3040         return status;
3041 }
3042
3043 static int video_outputsw_set(int status)
3044 {
3045         int autosw;
3046         int res = 0;
3047
3048         switch (video_supported) {
3049         case TPACPI_VIDEO_570:
3050                 res = acpi_evalf(NULL, NULL,
3051                                  "\\_SB.PHS2", "vdd",
3052                                  TP_ACPI_VIDEO_570_PHS2CMD,
3053                                  status | TP_ACPI_VIDEO_570_PHS2SET);
3054                 break;
3055         case TPACPI_VIDEO_770:
3056                 autosw = video_autosw_get();
3057                 if (autosw < 0)
3058                         return autosw;
3059
3060                 res = video_autosw_set(1);
3061                 if (res)
3062                         return res;
3063                 res = acpi_evalf(vid_handle, NULL,
3064                                  "ASWT", "vdd", status * 0x100, 0);
3065                 if (!autosw && video_autosw_set(autosw)) {
3066                         printk(TPACPI_ERR
3067                                "video auto-switch left enabled due to error\n");
3068                         return -EIO;
3069                 }
3070                 break;
3071         case TPACPI_VIDEO_NEW:
3072                 res = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) &&
3073                       acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1);
3074                 break;
3075         default:
3076                 return -ENOSYS;
3077         }
3078
3079         return (res)? 0 : -EIO;
3080 }
3081
3082 static int video_autosw_get(void)
3083 {
3084         int autosw = 0;
3085
3086         switch (video_supported) {
3087         case TPACPI_VIDEO_570:
3088                 if (!acpi_evalf(vid_handle, &autosw, "SWIT", "d"))
3089                         return -EIO;
3090                 break;
3091         case TPACPI_VIDEO_770:
3092         case TPACPI_VIDEO_NEW:
3093                 if (!acpi_evalf(vid_handle, &autosw, "^VDEE", "d"))
3094                         return -EIO;
3095                 break;
3096         default:
3097                 return -ENOSYS;
3098         }
3099
3100         return autosw & 1;
3101 }
3102
3103 static int video_autosw_set(int enable)
3104 {
3105         if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", (enable)? 1 : 0))
3106                 return -EIO;
3107         return 0;
3108 }
3109
3110 static int video_outputsw_cycle(void)
3111 {
3112         int autosw = video_autosw_get();
3113         int res;
3114
3115         if (autosw < 0)
3116                 return autosw;
3117
3118         switch (video_supported) {
3119         case TPACPI_VIDEO_570:
3120                 res = video_autosw_set(1);
3121                 if (res)
3122                         return res;
3123                 res = acpi_evalf(ec_handle, NULL, "_Q16", "v");
3124                 break;
3125         case TPACPI_VIDEO_770:
3126         case TPACPI_VIDEO_NEW:
3127                 res = video_autosw_set(1);
3128                 if (res)
3129                         return res;
3130                 res = acpi_evalf(vid_handle, NULL, "VSWT", "v");
3131                 break;
3132         default:
3133                 return -ENOSYS;
3134         }
3135         if (!autosw && video_autosw_set(autosw)) {
3136                 printk(TPACPI_ERR
3137                        "video auto-switch left enabled due to error\n");
3138                 return -EIO;
3139         }
3140
3141         return (res)? 0 : -EIO;
3142 }
3143
3144 static int video_expand_toggle(void)
3145 {
3146         switch (video_supported) {
3147         case TPACPI_VIDEO_570:
3148                 return acpi_evalf(ec_handle, NULL, "_Q17", "v")?
3149                         0 : -EIO;
3150         case TPACPI_VIDEO_770:
3151                 return acpi_evalf(vid_handle, NULL, "VEXP", "v")?
3152                         0 : -EIO;
3153         case TPACPI_VIDEO_NEW:
3154                 return acpi_evalf(NULL, NULL, "\\VEXP", "v")?
3155                         0 : -EIO;
3156         default:
3157                 return -ENOSYS;
3158         }
3159         /* not reached */
3160 }
3161
3162 static int video_read(char *p)
3163 {
3164         int status, autosw;
3165         int len = 0;
3166
3167         if (video_supported == TPACPI_VIDEO_NONE) {
3168                 len += sprintf(p + len, "status:\t\tnot supported\n");
3169                 return len;
3170         }
3171
3172         status = video_outputsw_get();
3173         if (status < 0)
3174                 return status;
3175
3176         autosw = video_autosw_get();
3177         if (autosw < 0)
3178                 return autosw;
3179
3180         len += sprintf(p + len, "status:\t\tsupported\n");
3181         len += sprintf(p + len, "lcd:\t\t%s\n", enabled(status, 0));
3182         len += sprintf(p + len, "crt:\t\t%s\n", enabled(status, 1));
3183         if (video_supported == TPACPI_VIDEO_NEW)
3184                 len += sprintf(p + len, "dvi:\t\t%s\n", enabled(status, 3));
3185         len += sprintf(p + len, "auto:\t\t%s\n", enabled(autosw, 0));
3186         len += sprintf(p + len, "commands:\tlcd_enable, lcd_disable\n");
3187         len += sprintf(p + len, "commands:\tcrt_enable, crt_disable\n");
3188         if (video_supported == TPACPI_VIDEO_NEW)
3189                 len += sprintf(p + len, "commands:\tdvi_enable, dvi_disable\n");
3190         len += sprintf(p + len, "commands:\tauto_enable, auto_disable\n");
3191         len += sprintf(p + len, "commands:\tvideo_switch, expand_toggle\n");
3192
3193         return len;
3194 }
3195
3196 static int video_write(char *buf)
3197 {
3198         char *cmd;
3199         int enable, disable, status;
3200         int res;
3201
3202         if (video_supported == TPACPI_VIDEO_NONE)
3203                 return -ENODEV;
3204
3205         enable = 0;
3206         disable = 0;
3207
3208         while ((cmd = next_cmd(&buf))) {
3209                 if (strlencmp(cmd, "lcd_enable") == 0) {
3210                         enable |= TP_ACPI_VIDEO_S_LCD;
3211                 } else if (strlencmp(cmd, "lcd_disable") == 0) {
3212                         disable |= TP_ACPI_VIDEO_S_LCD;
3213                 } else if (strlencmp(cmd, "crt_enable") == 0) {
3214                         enable |= TP_ACPI_VIDEO_S_CRT;
3215                 } else if (strlencmp(cmd, "crt_disable") == 0) {
3216                         disable |= TP_ACPI_VIDEO_S_CRT;
3217                 } else if (video_supported == TPACPI_VIDEO_NEW &&
3218                            strlencmp(cmd, "dvi_enable") == 0) {
3219                         enable |= TP_ACPI_VIDEO_S_DVI;
3220                 } else if (video_supported == TPACPI_VIDEO_NEW &&
3221                            strlencmp(cmd, "dvi_disable") == 0) {
3222                         disable |= TP_ACPI_VIDEO_S_DVI;
3223                 } else if (strlencmp(cmd, "auto_enable") == 0) {
3224                         res = video_autosw_set(1);
3225                         if (res)
3226                                 return res;
3227                 } else if (strlencmp(cmd, "auto_disable") == 0) {
3228                         res = video_autosw_set(0);
3229                         if (res)
3230                                 return res;
3231                 } else if (strlencmp(cmd, "video_switch") == 0) {
3232                         res = video_outputsw_cycle();
3233                         if (res)
3234                                 return res;
3235                 } else if (strlencmp(cmd, "expand_toggle") == 0) {
3236                         res = video_expand_toggle();
3237                         if (res)
3238                                 return res;
3239                 } else
3240                         return -EINVAL;
3241         }
3242
3243         if (enable || disable) {
3244                 status = video_outputsw_get();
3245                 if (status < 0)
3246                         return status;
3247                 res = video_outputsw_set((status & ~disable) | enable);
3248                 if (res)
3249                         return res;
3250         }
3251
3252         return 0;
3253 }
3254
3255 static struct ibm_struct video_driver_data = {
3256         .name = "video",
3257         .read = video_read,
3258         .write = video_write,
3259         .exit = video_exit,
3260 };
3261
3262 #endif /* CONFIG_THINKPAD_ACPI_VIDEO */
3263
3264 /*************************************************************************
3265  * Light (thinklight) subdriver
3266  */
3267
3268 TPACPI_HANDLE(lght, root, "\\LGHT");    /* A21e, A2xm/p, T20-22, X20-21 */
3269 TPACPI_HANDLE(ledb, ec, "LEDB");                /* G4x */
3270
3271 static int light_get_status(void)
3272 {
3273         int status = 0;
3274
3275         if (tp_features.light_status) {
3276                 if (!acpi_evalf(ec_handle, &status, "KBLT", "d"))
3277                         return -EIO;
3278                 return (!!status);
3279         }
3280
3281         return -ENXIO;
3282 }
3283
3284 static int light_set_status(int status)
3285 {
3286         int rc;
3287
3288         if (tp_features.light) {
3289                 if (cmos_handle) {
3290                         rc = acpi_evalf(cmos_handle, NULL, NULL, "vd",
3291                                         (status)?
3292                                                 TP_CMOS_THINKLIGHT_ON :
3293                                                 TP_CMOS_THINKLIGHT_OFF);
3294                 } else {
3295                         rc = acpi_evalf(lght_handle, NULL, NULL, "vd",
3296                                         (status)? 1 : 0);
3297                 }
3298                 return (rc)? 0 : -EIO;
3299         }
3300
3301         return -ENXIO;
3302 }
3303
3304 static void light_set_status_worker(struct work_struct *work)
3305 {
3306         struct tpacpi_led_classdev *data =
3307                         container_of(work, struct tpacpi_led_classdev, work);
3308
3309         if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING))
3310                 light_set_status((data->new_brightness != LED_OFF));
3311 }
3312
3313 static void light_sysfs_set(struct led_classdev *led_cdev,
3314                         enum led_brightness brightness)
3315 {
3316         struct tpacpi_led_classdev *data =
3317                 container_of(led_cdev,
3318                              struct tpacpi_led_classdev,
3319                              led_classdev);
3320         data->new_brightness = brightness;
3321         queue_work(tpacpi_wq, &data->work);
3322 }
3323
3324 static enum led_brightness light_sysfs_get(struct led_classdev *led_cdev)
3325 {
3326         return (light_get_status() == 1)? LED_FULL : LED_OFF;
3327 }
3328
3329 static struct tpacpi_led_classdev tpacpi_led_thinklight = {
3330         .led_classdev = {
3331                 .name           = "tpacpi::thinklight",
3332                 .brightness_set = &light_sysfs_set,
3333                 .brightness_get = &light_sysfs_get,
3334         }
3335 };
3336
3337 static int __init light_init(struct ibm_init_struct *iibm)
3338 {
3339         int rc;
3340
3341         vdbg_printk(TPACPI_DBG_INIT, "initializing light subdriver\n");
3342
3343         TPACPI_ACPIHANDLE_INIT(ledb);
3344         TPACPI_ACPIHANDLE_INIT(lght);
3345         TPACPI_ACPIHANDLE_INIT(cmos);
3346         INIT_WORK(&tpacpi_led_thinklight.work, light_set_status_worker);
3347
3348         /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */
3349         tp_features.light = (cmos_handle || lght_handle) && !ledb_handle;
3350
3351         if (tp_features.light)
3352                 /* light status not supported on
3353                    570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */
3354                 tp_features.light_status =
3355                         acpi_evalf(ec_handle, NULL, "KBLT", "qv");
3356
3357         vdbg_printk(TPACPI_DBG_INIT, "light is %s, light status is %s\n",
3358                 str_supported(tp_features.light),
3359                 str_supported(tp_features.light_status));
3360
3361         if (!tp_features.light)
3362                 return 1;
3363
3364         rc = led_classdev_register(&tpacpi_pdev->dev,
3365                                    &tpacpi_led_thinklight.led_classdev);
3366
3367         if (rc < 0) {
3368                 tp_features.light = 0;
3369                 tp_features.light_status = 0;
3370         } else  {
3371                 rc = 0;
3372         }
3373
3374         return rc;
3375 }
3376
3377 static void light_exit(void)
3378 {
3379         led_classdev_unregister(&tpacpi_led_thinklight.led_classdev);
3380         if (work_pending(&tpacpi_led_thinklight.work))
3381                 flush_workqueue(tpacpi_wq);
3382 }
3383
3384 static int light_read(char *p)
3385 {
3386         int len = 0;
3387         int status;
3388
3389         if (!tp_features.light) {
3390                 len += sprintf(p + len, "status:\t\tnot supported\n");
3391         } else if (!tp_features.light_status) {
3392                 len += sprintf(p + len, "status:\t\tunknown\n");
3393                 len += sprintf(p + len, "commands:\ton, off\n");
3394         } else {
3395                 status = light_get_status();
3396                 if (status < 0)
3397                         return status;
3398                 len += sprintf(p + len, "status:\t\t%s\n", onoff(status, 0));
3399                 len += sprintf(p + len, "commands:\ton, off\n");
3400         }
3401
3402         return len;
3403 }
3404
3405 static int light_write(char *buf)
3406 {
3407         char *cmd;
3408         int newstatus = 0;
3409
3410         if (!tp_features.light)
3411                 return -ENODEV;
3412
3413         while ((cmd = next_cmd(&buf))) {
3414                 if (strlencmp(cmd, "on") == 0) {
3415                         newstatus = 1;
3416                 } else if (strlencmp(cmd, "off") == 0) {
3417                         newstatus = 0;
3418                 } else
3419                         return -EINVAL;
3420         }
3421
3422         return light_set_status(newstatus);
3423 }
3424
3425 static struct ibm_struct light_driver_data = {
3426         .name = "light",
3427         .read = light_read,
3428         .write = light_write,
3429         .exit = light_exit,
3430 };
3431
3432 /*************************************************************************
3433  * Dock subdriver
3434  */
3435
3436 #ifdef CONFIG_THINKPAD_ACPI_DOCK
3437
3438 static void dock_notify(struct ibm_struct *ibm, u32 event);
3439 static int dock_read(char *p);
3440 static int dock_write(char *buf);
3441
3442 TPACPI_HANDLE(dock, root, "\\_SB.GDCK", /* X30, X31, X40 */
3443            "\\_SB.PCI0.DOCK",   /* 600e/x,770e,770x,A2xm/p,T20-22,X20-21 */
3444            "\\_SB.PCI0.PCI1.DOCK",      /* all others */
3445            "\\_SB.PCI.ISA.SLCE",        /* 570 */
3446     );                          /* A21e,G4x,R30,R31,R32,R40,R40e,R50e */
3447
3448 /* don't list other alternatives as we install a notify handler on the 570 */
3449 TPACPI_HANDLE(pci, root, "\\_SB.PCI");  /* 570 */
3450
3451 static const struct acpi_device_id ibm_pci_device_ids[] = {
3452         {PCI_ROOT_HID_STRING, 0},
3453         {"", 0},
3454 };
3455
3456 static struct tp_acpi_drv_struct ibm_dock_acpidriver[2] = {
3457         {
3458          .notify = dock_notify,
3459          .handle = &dock_handle,
3460          .type = ACPI_SYSTEM_NOTIFY,
3461         },
3462         {
3463         /* THIS ONE MUST NEVER BE USED FOR DRIVER AUTOLOADING.
3464          * We just use it to get notifications of dock hotplug
3465          * in very old thinkpads */
3466          .hid = ibm_pci_device_ids,
3467          .notify = dock_notify,
3468          .handle = &pci_handle,
3469          .type = ACPI_SYSTEM_NOTIFY,
3470         },
3471 };
3472
3473 static struct ibm_struct dock_driver_data[2] = {
3474         {
3475          .name = "dock",
3476          .read = dock_read,
3477          .write = dock_write,
3478          .acpi = &ibm_dock_acpidriver[0],
3479         },
3480         {
3481          .name = "dock",
3482          .acpi = &ibm_dock_acpidriver[1],
3483         },
3484 };
3485
3486 #define dock_docked() (_sta(dock_handle) & 1)
3487
3488 static int __init dock_init(struct ibm_init_struct *iibm)
3489 {
3490         vdbg_printk(TPACPI_DBG_INIT, "initializing dock subdriver\n");
3491
3492         TPACPI_ACPIHANDLE_INIT(dock);
3493
3494         vdbg_printk(TPACPI_DBG_INIT, "dock is %s\n",
3495                 str_supported(dock_handle != NULL));
3496
3497         return (dock_handle)? 0 : 1;
3498 }
3499
3500 static int __init dock_init2(struct ibm_init_struct *iibm)
3501 {
3502         int dock2_needed;
3503
3504         vdbg_printk(TPACPI_DBG_INIT, "initializing dock subdriver part 2\n");
3505
3506         if (dock_driver_data[0].flags.acpi_driver_registered &&
3507             dock_driver_data[0].flags.acpi_notify_installed) {
3508                 TPACPI_ACPIHANDLE_INIT(pci);
3509                 dock2_needed = (pci_handle != NULL);
3510                 vdbg_printk(TPACPI_DBG_INIT,
3511                             "dock PCI handler for the TP 570 is %s\n",
3512                             str_supported(dock2_needed));
3513         } else {
3514                 vdbg_printk(TPACPI_DBG_INIT,
3515                 "dock subdriver part 2 not required\n");
3516                 dock2_needed = 0;
3517         }
3518
3519         return (dock2_needed)? 0 : 1;
3520 }
3521
3522 static void dock_notify(struct ibm_struct *ibm, u32 event)
3523 {
3524         int docked = dock_docked();
3525         int pci = ibm->acpi->hid && ibm->acpi->device &&
3526                 acpi_match_device_ids(ibm->acpi->device, ibm_pci_device_ids);
3527         int data;
3528
3529         if (event == 1 && !pci) /* 570 */
3530                 data = 1;       /* button */
3531         else if (event == 1 && pci)     /* 570 */
3532                 data = 3;       /* dock */
3533         else if (event == 3 && docked)
3534                 data = 1;       /* button */
3535         else if (event == 3 && !docked)
3536                 data = 2;       /* undock */
3537         else if (event == 0 && docked)
3538                 data = 3;       /* dock */
3539         else {
3540                 printk(TPACPI_ERR "unknown dock event %d, status %d\n",
3541                        event, _sta(dock_handle));
3542                 data = 0;       /* unknown */
3543         }
3544         acpi_bus_generate_proc_event(ibm->acpi->device, event, data);
3545         acpi_bus_generate_netlink_event(ibm->acpi->device->pnp.device_class,
3546                                           ibm->acpi->device->dev.bus_id,
3547                                           event, data);
3548 }
3549
3550 static int dock_read(char *p)
3551 {
3552         int len = 0;
3553         int docked = dock_docked();
3554
3555         if (!dock_handle)
3556                 len += sprintf(p + len, "status:\t\tnot supported\n");
3557         else if (!docked)
3558                 len += sprintf(p + len, "status:\t\tundocked\n");
3559         else {
3560                 len += sprintf(p + len, "status:\t\tdocked\n");
3561                 len += sprintf(p + len, "commands:\tdock, undock\n");
3562         }
3563
3564         return len;
3565 }
3566
3567 static int dock_write(char *buf)
3568 {
3569         char *cmd;
3570
3571         if (!dock_docked())
3572                 return -ENODEV;
3573
3574         while ((cmd = next_cmd(&buf))) {
3575                 if (strlencmp(cmd, "undock") == 0) {
3576                         if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 0) ||
3577                             !acpi_evalf(dock_handle, NULL, "_EJ0", "vd", 1))
3578                                 return -EIO;
3579                 } else if (strlencmp(cmd, "dock") == 0) {
3580                         if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 1))
3581                                 return -EIO;
3582                 } else
3583                         return -EINVAL;
3584         }
3585
3586         return 0;
3587 }
3588
3589 #endif /* CONFIG_THINKPAD_ACPI_DOCK */
3590
3591 /*************************************************************************
3592  * Bay subdriver
3593  */
3594
3595 #ifdef CONFIG_THINKPAD_ACPI_BAY
3596
3597 TPACPI_HANDLE(bay, root, "\\_SB.PCI.IDE.SECN.MAST",     /* 570 */
3598            "\\_SB.PCI0.IDE0.IDES.IDSM", /* 600e/x, 770e, 770x */
3599            "\\_SB.PCI0.SATA.SCND.MSTR", /* T60, X60, Z60 */
3600            "\\_SB.PCI0.IDE0.SCND.MSTR", /* all others */
3601            );                           /* A21e, R30, R31 */
3602 TPACPI_HANDLE(bay_ej, bay, "_EJ3",      /* 600e/x, A2xm/p, A3x */
3603            "_EJ0",              /* all others */
3604            );                   /* 570,A21e,G4x,R30,R31,R32,R40e,R50e */
3605 TPACPI_HANDLE(bay2, root, "\\_SB.PCI0.IDE0.PRIM.SLAV",  /* A3x, R32 */
3606            "\\_SB.PCI0.IDE0.IDEP.IDPS", /* 600e/x, 770e, 770x */
3607            );                           /* all others */
3608 TPACPI_HANDLE(bay2_ej, bay2, "_EJ3",    /* 600e/x, 770e, A3x */
3609            "_EJ0",                      /* 770x */
3610            );                           /* all others */
3611
3612 static int __init bay_init(struct ibm_init_struct *iibm)
3613 {
3614         vdbg_printk(TPACPI_DBG_INIT, "initializing bay subdriver\n");
3615
3616         TPACPI_ACPIHANDLE_INIT(bay);
3617         if (bay_handle)
3618                 TPACPI_ACPIHANDLE_INIT(bay_ej);
3619         TPACPI_ACPIHANDLE_INIT(bay2);
3620         if (bay2_handle)
3621                 TPACPI_ACPIHANDLE_INIT(bay2_ej);
3622
3623         tp_features.bay_status = bay_handle &&
3624                 acpi_evalf(bay_handle, NULL, "_STA", "qv");
3625         tp_features.bay_status2 = bay2_handle &&
3626                 acpi_evalf(bay2_handle, NULL, "_STA", "qv");
3627
3628         tp_features.bay_eject = bay_handle && bay_ej_handle &&
3629                 (strlencmp(bay_ej_path, "_EJ0") == 0 || experimental);
3630         tp_features.bay_eject2 = bay2_handle && bay2_ej_handle &&
3631                 (strlencmp(bay2_ej_path, "_EJ0") == 0 || experimental);
3632
3633         vdbg_printk(TPACPI_DBG_INIT,
3634                 "bay 1: status %s, eject %s; bay 2: status %s, eject %s\n",
3635                 str_supported(tp_features.bay_status),
3636                 str_supported(tp_features.bay_eject),
3637                 str_supported(tp_features.bay_status2),
3638                 str_supported(tp_features.bay_eject2));
3639
3640         return (tp_features.bay_status || tp_features.bay_eject ||
3641                 tp_features.bay_status2 || tp_features.bay_eject2)? 0 : 1;
3642 }
3643
3644 static void bay_notify(struct ibm_struct *ibm, u32 event)
3645 {
3646         acpi_bus_generate_proc_event(ibm->acpi->device, event, 0);
3647         acpi_bus_generate_netlink_event(ibm->acpi->device->pnp.device_class,
3648                                           ibm->acpi->device->dev.bus_id,
3649                                           event, 0);
3650 }
3651
3652 #define bay_occupied(b) (_sta(b##_handle) & 1)
3653
3654 static int bay_read(char *p)
3655 {
3656         int len = 0;
3657         int occupied = bay_occupied(bay);
3658         int occupied2 = bay_occupied(bay2);
3659         int eject, eject2;
3660
3661         len += sprintf(p + len, "status:\t\t%s\n",
3662                 tp_features.bay_status ?
3663                         (occupied ? "occupied" : "unoccupied") :
3664                                 "not supported");
3665         if (tp_features.bay_status2)
3666                 len += sprintf(p + len, "status2:\t%s\n", occupied2 ?
3667                                "occupied" : "unoccupied");
3668
3669         eject = tp_features.bay_eject && occupied;
3670         eject2 = tp_features.bay_eject2 && occupied2;
3671
3672         if (eject && eject2)
3673                 len += sprintf(p + len, "commands:\teject, eject2\n");
3674         else if (eject)
3675                 len += sprintf(p + len, "commands:\teject\n");
3676         else if (eject2)
3677                 len += sprintf(p + len, "commands:\teject2\n");
3678
3679         return len;
3680 }
3681
3682 static int bay_write(char *buf)
3683 {
3684         char *cmd;
3685
3686         if (!tp_features.bay_eject && !tp_features.bay_eject2)
3687                 return -ENODEV;
3688
3689         while ((cmd = next_cmd(&buf))) {
3690                 if (tp_features.bay_eject && strlencmp(cmd, "eject") == 0) {
3691                         if (!acpi_evalf(bay_ej_handle, NULL, NULL, "vd", 1))
3692                                 return -EIO;
3693                 } else if (tp_features.bay_eject2 &&
3694                            strlencmp(cmd, "eject2") == 0) {
3695                         if (!acpi_evalf(bay2_ej_handle, NULL, NULL, "vd", 1))
3696                                 return -EIO;
3697                 } else
3698                         return -EINVAL;
3699         }
3700
3701         return 0;
3702 }
3703
3704 static struct tp_acpi_drv_struct ibm_bay_acpidriver = {
3705         .notify = bay_notify,
3706         .handle = &bay_handle,
3707         .type = ACPI_SYSTEM_NOTIFY,
3708 };
3709
3710 static struct ibm_struct bay_driver_data = {
3711         .name = "bay",
3712         .read = bay_read,
3713         .write = bay_write,
3714         .acpi = &ibm_bay_acpidriver,
3715 };
3716
3717 #endif /* CONFIG_THINKPAD_ACPI_BAY */
3718
3719 /*************************************************************************
3720  * CMOS subdriver
3721  */
3722
3723 /* sysfs cmos_command -------------------------------------------------- */
3724 static ssize_t cmos_command_store(struct device *dev,
3725                             struct device_attribute *attr,
3726                             const char *buf, size_t count)
3727 {
3728         unsigned long cmos_cmd;
3729         int res;
3730
3731         if (parse_strtoul(buf, 21, &cmos_cmd))
3732                 return -EINVAL;
3733
3734         res = issue_thinkpad_cmos_command(cmos_cmd);
3735         return (res)? res : count;
3736 }
3737
3738 static struct device_attribute dev_attr_cmos_command =
3739         __ATTR(cmos_command, S_IWUSR, NULL, cmos_command_store);
3740
3741 /* --------------------------------------------------------------------- */
3742
3743 static int __init cmos_init(struct ibm_init_struct *iibm)
3744 {
3745         int res;
3746
3747         vdbg_printk(TPACPI_DBG_INIT,
3748                 "initializing cmos commands subdriver\n");
3749
3750         TPACPI_ACPIHANDLE_INIT(cmos);
3751
3752         vdbg_printk(TPACPI_DBG_INIT, "cmos commands are %s\n",
3753                 str_supported(cmos_handle != NULL));
3754
3755         res = device_create_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
3756         if (res)
3757                 return res;
3758
3759         return (cmos_handle)? 0 : 1;
3760 }
3761
3762 static void cmos_exit(void)
3763 {
3764         device_remove_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
3765 }
3766
3767 static int cmos_read(char *p)
3768 {
3769         int len = 0;
3770
3771         /* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
3772            R30, R31, T20-22, X20-21 */
3773         if (!cmos_handle)
3774                 len += sprintf(p + len, "status:\t\tnot supported\n");
3775         else {
3776                 len += sprintf(p + len, "status:\t\tsupported\n");
3777                 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-21)\n");
3778         }
3779
3780         return len;
3781 }
3782
3783 static int cmos_write(char *buf)
3784 {
3785         char *cmd;
3786         int cmos_cmd, res;
3787
3788         while ((cmd = next_cmd(&buf))) {
3789                 if (sscanf(cmd, "%u", &cmos_cmd) == 1 &&
3790                     cmos_cmd >= 0 && cmos_cmd <= 21) {
3791                         /* cmos_cmd set */
3792                 } else
3793                         return -EINVAL;
3794
3795                 res = issue_thinkpad_cmos_command(cmos_cmd);
3796                 if (res)
3797                         return res;
3798         }
3799
3800         return 0;
3801 }
3802
3803 static struct ibm_struct cmos_driver_data = {
3804         .name = "cmos",
3805         .read = cmos_read,
3806         .write = cmos_write,
3807         .exit = cmos_exit,
3808 };
3809
3810 /*************************************************************************
3811  * LED subdriver
3812  */
3813
3814 enum led_access_mode {
3815         TPACPI_LED_NONE = 0,
3816         TPACPI_LED_570, /* 570 */
3817         TPACPI_LED_OLD, /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
3818         TPACPI_LED_NEW, /* all others */
3819 };
3820
3821 enum {  /* For TPACPI_LED_OLD */
3822         TPACPI_LED_EC_HLCL = 0x0c,      /* EC reg to get led to power on */
3823         TPACPI_LED_EC_HLBL = 0x0d,      /* EC reg to blink a lit led */
3824         TPACPI_LED_EC_HLMS = 0x0e,      /* EC reg to select led to command */
3825 };
3826
3827 enum led_status_t {
3828         TPACPI_LED_OFF = 0,
3829         TPACPI_LED_ON,
3830         TPACPI_LED_BLINK,
3831 };
3832
3833 static enum led_access_mode led_supported;
3834
3835 TPACPI_HANDLE(led, ec, "SLED",  /* 570 */
3836            "SYSL",              /* 600e/x, 770e, 770x, A21e, A2xm/p, */
3837                                 /* T20-22, X20-21 */
3838            "LED",               /* all others */
3839            );                   /* R30, R31 */
3840
3841 #define TPACPI_LED_NUMLEDS 8
3842 static struct tpacpi_led_classdev *tpacpi_leds;
3843 static enum led_status_t tpacpi_led_state_cache[TPACPI_LED_NUMLEDS];
3844 static const char * const tpacpi_led_names[TPACPI_LED_NUMLEDS] = {
3845         /* there's a limit of 19 chars + NULL before 2.6.26 */
3846         "tpacpi::power",
3847         "tpacpi:orange:batt",
3848         "tpacpi:green:batt",
3849         "tpacpi::dock_active",
3850         "tpacpi::bay_active",
3851         "tpacpi::dock_batt",
3852         "tpacpi::unknown_led",
3853         "tpacpi::standby",
3854 };
3855
3856 static int led_get_status(const unsigned int led)
3857 {
3858         int status;
3859         enum led_status_t led_s;
3860
3861         switch (led_supported) {
3862         case TPACPI_LED_570:
3863                 if (!acpi_evalf(ec_handle,
3864                                 &status, "GLED", "dd", 1 << led))
3865                         return -EIO;
3866                 led_s = (status == 0)?
3867                                 TPACPI_LED_OFF :
3868                                 ((status == 1)?
3869                                         TPACPI_LED_ON :
3870                                         TPACPI_LED_BLINK);
3871                 tpacpi_led_state_cache[led] = led_s;
3872                 return led_s;
3873         default:
3874                 return -ENXIO;
3875         }
3876
3877         /* not reached */
3878 }
3879
3880 static int led_set_status(const unsigned int led,
3881                           const enum led_status_t ledstatus)
3882 {
3883         /* off, on, blink. Index is led_status_t */
3884         static const unsigned int led_sled_arg1[] = { 0, 1, 3 };
3885         static const unsigned int led_led_arg1[] = { 0, 0x80, 0xc0 };
3886
3887         int rc = 0;
3888
3889         switch (led_supported) {
3890         case TPACPI_LED_570:
3891                 /* 570 */
3892                 if (led > 7)
3893                         return -EINVAL;
3894                 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
3895                                 (1 << led), led_sled_arg1[ledstatus]))
3896                         rc = -EIO;
3897                 break;
3898         case TPACPI_LED_OLD:
3899                 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */
3900                 if (led > 7)
3901                         return -EINVAL;
3902                 rc = ec_write(TPACPI_LED_EC_HLMS, (1 << led));
3903                 if (rc >= 0)
3904                         rc = ec_write(TPACPI_LED_EC_HLBL,
3905                                       (ledstatus == TPACPI_LED_BLINK) << led);
3906                 if (rc >= 0)
3907                         rc = ec_write(TPACPI_LED_EC_HLCL,
3908                                       (ledstatus != TPACPI_LED_OFF) << led);
3909                 break;
3910         case TPACPI_LED_NEW:
3911                 /* all others */
3912                 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
3913                                 led, led_led_arg1[ledstatus]))
3914                         rc = -EIO;
3915                 break;
3916         default:
3917                 rc = -ENXIO;
3918         }
3919
3920         if (!rc)
3921                 tpacpi_led_state_cache[led] = ledstatus;
3922
3923         return rc;
3924 }
3925
3926 static void led_sysfs_set_status(unsigned int led,
3927                                  enum led_brightness brightness)
3928 {
3929         led_set_status(led,
3930                         (brightness == LED_OFF) ?
3931                         TPACPI_LED_OFF :
3932                         (tpacpi_led_state_cache[led] == TPACPI_LED_BLINK) ?
3933                                 TPACPI_LED_BLINK : TPACPI_LED_ON);
3934 }
3935
3936 static void led_set_status_worker(struct work_struct *work)
3937 {
3938         struct tpacpi_led_classdev *data =
3939                 container_of(work, struct tpacpi_led_classdev, work);
3940
3941         if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING))
3942                 led_sysfs_set_status(data->led, data->new_brightness);
3943 }
3944
3945 static void led_sysfs_set(struct led_classdev *led_cdev,
3946                         enum led_brightness brightness)
3947 {
3948         struct tpacpi_led_classdev *data = container_of(led_cdev,
3949                              struct tpacpi_led_classdev, led_classdev);
3950
3951         data->new_brightness = brightness;
3952         queue_work(tpacpi_wq, &data->work);
3953 }
3954
3955 static int led_sysfs_blink_set(struct led_classdev *led_cdev,
3956                         unsigned long *delay_on, unsigned long *delay_off)
3957 {
3958         struct tpacpi_led_classdev *data = container_of(led_cdev,
3959                              struct tpacpi_led_classdev, led_classdev);
3960
3961         /* Can we choose the flash rate? */
3962         if (*delay_on == 0 && *delay_off == 0) {
3963                 /* yes. set them to the hardware blink rate (1 Hz) */
3964                 *delay_on = 500; /* ms */
3965                 *delay_off = 500; /* ms */
3966         } else if ((*delay_on != 500) || (*delay_off != 500))
3967                 return -EINVAL;
3968
3969         data->new_brightness = TPACPI_LED_BLINK;
3970         queue_work(tpacpi_wq, &data->work);
3971
3972         return 0;
3973 }
3974
3975 static enum led_brightness led_sysfs_get(struct led_classdev *led_cdev)
3976 {
3977         int rc;
3978
3979         struct tpacpi_led_classdev *data = container_of(led_cdev,
3980                              struct tpacpi_led_classdev, led_classdev);
3981
3982         rc = led_get_status(data->led);
3983
3984         if (rc == TPACPI_LED_OFF || rc < 0)
3985                 rc = LED_OFF;   /* no error handling in led class :( */
3986         else
3987                 rc = LED_FULL;
3988
3989         return rc;
3990 }
3991
3992 static void led_exit(void)
3993 {
3994         unsigned int i;
3995
3996         for (i = 0; i < TPACPI_LED_NUMLEDS; i++) {
3997                 if (tpacpi_leds[i].led_classdev.name)
3998                         led_classdev_unregister(&tpacpi_leds[i].led_classdev);
3999         }
4000
4001         kfree(tpacpi_leds);
4002 }
4003
4004 static int __init led_init(struct ibm_init_struct *iibm)
4005 {
4006         unsigned int i;
4007         int rc;
4008
4009         vdbg_printk(TPACPI_DBG_INIT, "initializing LED subdriver\n");
4010
4011         TPACPI_ACPIHANDLE_INIT(led);
4012
4013         if (!led_handle)
4014                 /* led not supported on R30, R31 */
4015                 led_supported = TPACPI_LED_NONE;
4016         else if (strlencmp(led_path, "SLED") == 0)
4017                 /* 570 */
4018                 led_supported = TPACPI_LED_570;
4019         else if (strlencmp(led_path, "SYSL") == 0)
4020                 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
4021                 led_supported = TPACPI_LED_OLD;
4022         else
4023                 /* all others */
4024                 led_supported = TPACPI_LED_NEW;
4025
4026         vdbg_printk(TPACPI_DBG_INIT, "LED commands are %s, mode %d\n",
4027                 str_supported(led_supported), led_supported);
4028
4029         tpacpi_leds = kzalloc(sizeof(*tpacpi_leds) * TPACPI_LED_NUMLEDS,
4030                               GFP_KERNEL);
4031         if (!tpacpi_leds) {
4032                 printk(TPACPI_ERR "Out of memory for LED data\n");
4033                 return -ENOMEM;
4034         }
4035
4036         for (i = 0; i < TPACPI_LED_NUMLEDS; i++) {
4037                 tpacpi_leds[i].led = i;
4038
4039                 tpacpi_leds[i].led_classdev.brightness_set = &led_sysfs_set;
4040                 tpacpi_leds[i].led_classdev.blink_set = &led_sysfs_blink_set;
4041                 if (led_supported == TPACPI_LED_570)
4042                         tpacpi_leds[i].led_classdev.brightness_get =
4043                                                         &led_sysfs_get;
4044
4045                 tpacpi_leds[i].led_classdev.name = tpacpi_led_names[i];
4046
4047                 INIT_WORK(&tpacpi_leds[i].work, led_set_status_worker);
4048
4049                 rc = led_classdev_register(&tpacpi_pdev->dev,
4050                                            &tpacpi_leds[i].led_classdev);
4051                 if (rc < 0) {
4052                         tpacpi_leds[i].led_classdev.name = NULL;
4053                         led_exit();
4054                         return rc;
4055                 }
4056         }
4057
4058         return (led_supported != TPACPI_LED_NONE)? 0 : 1;
4059 }
4060
4061 #define str_led_status(s) \
4062         ((s) == TPACPI_LED_OFF ? "off" : \
4063                 ((s) == TPACPI_LED_ON ? "on" : "blinking"))
4064
4065 static int led_read(char *p)
4066 {
4067         int len = 0;
4068
4069         if (!led_supported) {
4070                 len += sprintf(p + len, "status:\t\tnot supported\n");
4071                 return len;
4072         }
4073         len += sprintf(p + len, "status:\t\tsupported\n");
4074
4075         if (led_supported == TPACPI_LED_570) {
4076                 /* 570 */
4077                 int i, status;
4078                 for (i = 0; i < 8; i++) {
4079                         status = led_get_status(i);
4080                         if (status < 0)
4081                                 return -EIO;
4082                         len += sprintf(p + len, "%d:\t\t%s\n",
4083                                        i, str_led_status(status));
4084                 }
4085         }
4086
4087         len += sprintf(p + len, "commands:\t"
4088                        "<led> on, <led> off, <led> blink (<led> is 0-7)\n");
4089
4090         return len;
4091 }
4092
4093 static int led_write(char *buf)
4094 {
4095         char *cmd;
4096         int led, rc;
4097         enum led_status_t s;
4098
4099         if (!led_supported)
4100                 return -ENODEV;
4101
4102         while ((cmd = next_cmd(&buf))) {
4103                 if (sscanf(cmd, "%d", &led) != 1 || led < 0 || led > 7)
4104                         return -EINVAL;
4105
4106                 if (strstr(cmd, "off")) {
4107                         s = TPACPI_LED_OFF;
4108                 } else if (strstr(cmd, "on")) {
4109                         s = TPACPI_LED_ON;
4110                 } else if (strstr(cmd, "blink")) {
4111                         s = TPACPI_LED_BLINK;
4112                 } else {
4113                         return -EINVAL;
4114                 }
4115
4116                 rc = led_set_status(led, s);
4117                 if (rc < 0)
4118                         return rc;
4119         }
4120
4121         return 0;
4122 }
4123
4124 static struct ibm_struct led_driver_data = {
4125         .name = "led",
4126         .read = led_read,
4127         .write = led_write,
4128         .exit = led_exit,
4129 };
4130
4131 /*************************************************************************
4132  * Beep subdriver
4133  */
4134
4135 TPACPI_HANDLE(beep, ec, "BEEP");        /* all except R30, R31 */
4136
4137 static int __init beep_init(struct ibm_init_struct *iibm)
4138 {
4139         vdbg_printk(TPACPI_DBG_INIT, "initializing beep subdriver\n");
4140
4141         TPACPI_ACPIHANDLE_INIT(beep);
4142
4143         vdbg_printk(TPACPI_DBG_INIT, "beep is %s\n",
4144                 str_supported(beep_handle != NULL));
4145
4146         return (beep_handle)? 0 : 1;
4147 }
4148
4149 static int beep_read(char *p)
4150 {
4151         int len = 0;
4152
4153         if (!beep_handle)
4154                 len += sprintf(p + len, "status:\t\tnot supported\n");
4155         else {
4156                 len += sprintf(p + len, "status:\t\tsupported\n");
4157                 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-17)\n");
4158         }
4159
4160         return len;
4161 }
4162
4163 static int beep_write(char *buf)
4164 {
4165         char *cmd;
4166         int beep_cmd;
4167
4168         if (!beep_handle)
4169                 return -ENODEV;
4170
4171         while ((cmd = next_cmd(&buf))) {
4172                 if (sscanf(cmd, "%u", &beep_cmd) == 1 &&
4173                     beep_cmd >= 0 && beep_cmd <= 17) {
4174                         /* beep_cmd set */
4175                 } else
4176                         return -EINVAL;
4177                 if (!acpi_evalf(beep_handle, NULL, NULL, "vdd", beep_cmd, 0))
4178                         return -EIO;
4179         }
4180
4181         return 0;
4182 }
4183
4184 static struct ibm_struct beep_driver_data = {
4185         .name = "beep",
4186         .read = beep_read,
4187         .write = beep_write,
4188 };
4189
4190 /*************************************************************************
4191  * Thermal subdriver
4192  */
4193
4194 enum thermal_access_mode {
4195         TPACPI_THERMAL_NONE = 0,        /* No thermal support */
4196         TPACPI_THERMAL_ACPI_TMP07,      /* Use ACPI TMP0-7 */
4197         TPACPI_THERMAL_ACPI_UPDT,       /* Use ACPI TMP0-7 with UPDT */
4198         TPACPI_THERMAL_TPEC_8,          /* Use ACPI EC regs, 8 sensors */
4199         TPACPI_THERMAL_TPEC_16,         /* Use ACPI EC regs, 16 sensors */
4200 };
4201
4202 enum { /* TPACPI_THERMAL_TPEC_* */
4203         TP_EC_THERMAL_TMP0 = 0x78,      /* ACPI EC regs TMP 0..7 */
4204         TP_EC_THERMAL_TMP8 = 0xC0,      /* ACPI EC regs TMP 8..15 */
4205         TP_EC_THERMAL_TMP_NA = -128,    /* ACPI EC sensor not available */
4206 };
4207
4208 #define TPACPI_MAX_THERMAL_SENSORS 16   /* Max thermal sensors supported */
4209 struct ibm_thermal_sensors_struct {
4210         s32 temp[TPACPI_MAX_THERMAL_SENSORS];
4211 };
4212
4213 static enum thermal_access_mode thermal_read_mode;
4214
4215 /* idx is zero-based */
4216 static int thermal_get_sensor(int idx, s32 *value)
4217 {
4218         int t;
4219         s8 tmp;
4220         char tmpi[5];
4221
4222         t = TP_EC_THERMAL_TMP0;
4223
4224         switch (thermal_read_mode) {
4225 #if TPACPI_MAX_THERMAL_SENSORS >= 16
4226         case TPACPI_THERMAL_TPEC_16:
4227                 if (idx >= 8 && idx <= 15) {
4228                         t = TP_EC_THERMAL_TMP8;
4229                         idx -= 8;
4230                 }
4231                 /* fallthrough */
4232 #endif
4233         case TPACPI_THERMAL_TPEC_8:
4234                 if (idx <= 7) {
4235                         if (!acpi_ec_read(t + idx, &tmp))
4236                                 return -EIO;
4237                         *value = tmp * 1000;
4238                         return 0;
4239                 }
4240                 break;
4241
4242         case TPACPI_THERMAL_ACPI_UPDT:
4243                 if (idx <= 7) {
4244                         snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
4245                         if (!acpi_evalf(ec_handle, NULL, "UPDT", "v"))
4246                                 return -EIO;
4247                         if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
4248                                 return -EIO;
4249                         *value = (t - 2732) * 100;
4250                         return 0;
4251                 }
4252                 break;
4253
4254         case TPACPI_THERMAL_ACPI_TMP07:
4255                 if (idx <= 7) {
4256                         snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
4257                         if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
4258                                 return -EIO;
4259                         if (t > 127 || t < -127)
4260                                 t = TP_EC_THERMAL_TMP_NA;
4261                         *value = t * 1000;
4262                         return 0;
4263                 }
4264                 break;
4265
4266         case TPACPI_THERMAL_NONE:
4267         default:
4268                 return -ENOSYS;
4269         }
4270
4271         return -EINVAL;
4272 }
4273
4274 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s)
4275 {
4276         int res, i;
4277         int n;
4278
4279         n = 8;
4280         i = 0;
4281
4282         if (!s)
4283                 return -EINVAL;
4284
4285         if (thermal_read_mode == TPACPI_THERMAL_TPEC_16)
4286                 n = 16;
4287
4288         for (i = 0 ; i < n; i++) {
4289                 res = thermal_get_sensor(i, &s->temp[i]);
4290                 if (res)
4291                         return res;
4292         }
4293
4294         return n;
4295 }
4296
4297 /* sysfs temp##_input -------------------------------------------------- */
4298
4299 static ssize_t thermal_temp_input_show(struct device *dev,
4300                            struct device_attribute *attr,
4301                            char *buf)
4302 {
4303         struct sensor_device_attribute *sensor_attr =
4304                                         to_sensor_dev_attr(attr);
4305         int idx = sensor_attr->index;
4306         s32 value;
4307         int res;
4308
4309         res = thermal_get_sensor(idx, &value);
4310         if (res)
4311                 return res;
4312         if (value == TP_EC_THERMAL_TMP_NA * 1000)
4313                 return -ENXIO;
4314
4315         return snprintf(buf, PAGE_SIZE, "%d\n", value);
4316 }
4317
4318 #define THERMAL_SENSOR_ATTR_TEMP(_idxA, _idxB) \
4319          SENSOR_ATTR(temp##_idxA##_input, S_IRUGO, \
4320                      thermal_temp_input_show, NULL, _idxB)
4321
4322 static struct sensor_device_attribute sensor_dev_attr_thermal_temp_input[] = {
4323         THERMAL_SENSOR_ATTR_TEMP(1, 0),
4324         THERMAL_SENSOR_ATTR_TEMP(2, 1),
4325         THERMAL_SENSOR_ATTR_TEMP(3, 2),
4326         THERMAL_SENSOR_ATTR_TEMP(4, 3),
4327         THERMAL_SENSOR_ATTR_TEMP(5, 4),
4328         THERMAL_SENSOR_ATTR_TEMP(6, 5),
4329         THERMAL_SENSOR_ATTR_TEMP(7, 6),
4330         THERMAL_SENSOR_ATTR_TEMP(8, 7),
4331         THERMAL_SENSOR_ATTR_TEMP(9, 8),
4332         THERMAL_SENSOR_ATTR_TEMP(10, 9),
4333         THERMAL_SENSOR_ATTR_TEMP(11, 10),
4334         THERMAL_SENSOR_ATTR_TEMP(12, 11),
4335         THERMAL_SENSOR_ATTR_TEMP(13, 12),
4336         THERMAL_SENSOR_ATTR_TEMP(14, 13),
4337         THERMAL_SENSOR_ATTR_TEMP(15, 14),
4338         THERMAL_SENSOR_ATTR_TEMP(16, 15),
4339 };
4340
4341 #define THERMAL_ATTRS(X) \
4342         &sensor_dev_attr_thermal_temp_input[X].dev_attr.attr
4343
4344 static struct attribute *thermal_temp_input_attr[] = {
4345         THERMAL_ATTRS(8),
4346         THERMAL_ATTRS(9),
4347         THERMAL_ATTRS(10),
4348         THERMAL_ATTRS(11),
4349         THERMAL_ATTRS(12),
4350         THERMAL_ATTRS(13),
4351         THERMAL_ATTRS(14),
4352         THERMAL_ATTRS(15),
4353         THERMAL_ATTRS(0),
4354         THERMAL_ATTRS(1),
4355         THERMAL_ATTRS(2),
4356         THERMAL_ATTRS(3),
4357         THERMAL_ATTRS(4),
4358         THERMAL_ATTRS(5),
4359         THERMAL_ATTRS(6),
4360         THERMAL_ATTRS(7),
4361         NULL
4362 };
4363
4364 static const struct attribute_group thermal_temp_input16_group = {
4365         .attrs = thermal_temp_input_attr
4366 };
4367
4368 static const struct attribute_group thermal_temp_input8_group = {
4369         .attrs = &thermal_temp_input_attr[8]
4370 };
4371
4372 #undef THERMAL_SENSOR_ATTR_TEMP
4373 #undef THERMAL_ATTRS
4374
4375 /* --------------------------------------------------------------------- */
4376
4377 static int __init thermal_init(struct ibm_init_struct *iibm)
4378 {
4379         u8 t, ta1, ta2;
4380         int i;
4381         int acpi_tmp7;
4382         int res;
4383
4384         vdbg_printk(TPACPI_DBG_INIT, "initializing thermal subdriver\n");
4385
4386         acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv");
4387
4388         if (thinkpad_id.ec_model) {
4389                 /*
4390                  * Direct EC access mode: sensors at registers
4391                  * 0x78-0x7F, 0xC0-0xC7.  Registers return 0x00 for
4392                  * non-implemented, thermal sensors return 0x80 when
4393                  * not available
4394                  */
4395
4396                 ta1 = ta2 = 0;
4397                 for (i = 0; i < 8; i++) {
4398                         if (acpi_ec_read(TP_EC_THERMAL_TMP0 + i, &t)) {
4399                                 ta1 |= t;
4400                         } else {
4401                                 ta1 = 0;
4402                                 break;
4403                         }
4404                         if (acpi_ec_read(TP_EC_THERMAL_TMP8 + i, &t)) {
4405                                 ta2 |= t;
4406                         } else {
4407                                 ta1 = 0;
4408                                 break;
4409                         }
4410                 }
4411                 if (ta1 == 0) {
4412                         /* This is sheer paranoia, but we handle it anyway */
4413                         if (acpi_tmp7) {
4414                                 printk(TPACPI_ERR
4415                                        "ThinkPad ACPI EC access misbehaving, "
4416                                        "falling back to ACPI TMPx access "
4417                                        "mode\n");
4418                                 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
4419                         } else {
4420                                 printk(TPACPI_ERR
4421                                        "ThinkPad ACPI EC access misbehaving, "
4422                                        "disabling thermal sensors access\n");
4423                                 thermal_read_mode = TPACPI_THERMAL_NONE;
4424                         }
4425                 } else {
4426                         thermal_read_mode =
4427                             (ta2 != 0) ?
4428                             TPACPI_THERMAL_TPEC_16 : TPACPI_THERMAL_TPEC_8;
4429                 }
4430         } else if (acpi_tmp7) {
4431                 if (acpi_evalf(ec_handle, NULL, "UPDT", "qv")) {
4432                         /* 600e/x, 770e, 770x */
4433                         thermal_read_mode = TPACPI_THERMAL_ACPI_UPDT;
4434                 } else {
4435                         /* Standard ACPI TMPx access, max 8 sensors */
4436                         thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
4437                 }
4438         } else {
4439                 /* temperatures not supported on 570, G4x, R30, R31, R32 */
4440                 thermal_read_mode = TPACPI_THERMAL_NONE;
4441         }
4442
4443         vdbg_printk(TPACPI_DBG_INIT, "thermal is %s, mode %d\n",
4444                 str_supported(thermal_read_mode != TPACPI_THERMAL_NONE),
4445                 thermal_read_mode);
4446
4447         switch (thermal_read_mode) {
4448         case TPACPI_THERMAL_TPEC_16:
4449                 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
4450                                 &thermal_temp_input16_group);
4451                 if (res)
4452                         return res;
4453                 break;
4454         case TPACPI_THERMAL_TPEC_8:
4455         case TPACPI_THERMAL_ACPI_TMP07:
4456         case TPACPI_THERMAL_ACPI_UPDT:
4457                 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
4458                                 &thermal_temp_input8_group);
4459                 if (res)
4460                         return res;
4461                 break;
4462         case TPACPI_THERMAL_NONE:
4463         default:
4464                 return 1;
4465         }
4466
4467         return 0;
4468 }
4469
4470 static void thermal_exit(void)
4471 {
4472         switch (thermal_read_mode) {
4473         case TPACPI_THERMAL_TPEC_16:
4474                 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
4475                                    &thermal_temp_input16_group);
4476                 break;
4477         case TPACPI_THERMAL_TPEC_8:
4478         case TPACPI_THERMAL_ACPI_TMP07:
4479         case TPACPI_THERMAL_ACPI_UPDT:
4480                 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
4481                                    &thermal_temp_input16_group);
4482                 break;
4483         case TPACPI_THERMAL_NONE:
4484         default:
4485                 break;
4486         }
4487 }
4488
4489 static int thermal_read(char *p)
4490 {
4491         int len = 0;
4492         int n, i;
4493         struct ibm_thermal_sensors_struct t;
4494
4495         n = thermal_get_sensors(&t);
4496         if (unlikely(n < 0))
4497                 return n;
4498
4499         len += sprintf(p + len, "temperatures:\t");
4500
4501         if (n > 0) {
4502                 for (i = 0; i < (n - 1); i++)
4503                         len += sprintf(p + len, "%d ", t.temp[i] / 1000);
4504                 len += sprintf(p + len, "%d\n", t.temp[i] / 1000);
4505         } else
4506                 len += sprintf(p + len, "not supported\n");
4507
4508         return len;
4509 }
4510
4511 static struct ibm_struct thermal_driver_data = {
4512         .name = "thermal",
4513         .read = thermal_read,
4514         .exit = thermal_exit,
4515 };
4516
4517 /*************************************************************************
4518  * EC Dump subdriver
4519  */
4520
4521 static u8 ecdump_regs[256];
4522
4523 static int ecdump_read(char *p)
4524 {
4525         int len = 0;
4526         int i, j;
4527         u8 v;
4528
4529         len += sprintf(p + len, "EC      "
4530                        " +00 +01 +02 +03 +04 +05 +06 +07"
4531                        " +08 +09 +0a +0b +0c +0d +0e +0f\n");
4532         for (i = 0; i < 256; i += 16) {
4533                 len += sprintf(p + len, "EC 0x%02x:", i);
4534                 for (j = 0; j < 16; j++) {
4535                         if (!acpi_ec_read(i + j, &v))
4536                                 break;
4537                         if (v != ecdump_regs[i + j])
4538                                 len += sprintf(p + len, " *%02x", v);
4539                         else
4540                                 len += sprintf(p + len, "  %02x", v);
4541                         ecdump_regs[i + j] = v;
4542                 }
4543                 len += sprintf(p + len, "\n");
4544                 if (j != 16)
4545                         break;
4546         }
4547
4548         /* These are way too dangerous to advertise openly... */
4549 #if 0
4550         len += sprintf(p + len, "commands:\t0x<offset> 0x<value>"
4551                        " (<offset> is 00-ff, <value> is 00-ff)\n");
4552         len += sprintf(p + len, "commands:\t0x<offset> <value>  "
4553                        " (<offset> is 00-ff, <value> is 0-255)\n");
4554 #endif
4555         return len;
4556 }
4557
4558 static int ecdump_write(char *buf)
4559 {
4560         char *cmd;
4561         int i, v;
4562
4563         while ((cmd = next_cmd(&buf))) {
4564                 if (sscanf(cmd, "0x%x 0x%x", &i, &v) == 2) {
4565                         /* i and v set */
4566                 } else if (sscanf(cmd, "0x%x %u", &i, &v) == 2) {
4567                         /* i and v set */
4568                 } else
4569                         return -EINVAL;
4570                 if (i >= 0 && i < 256 && v >= 0 && v < 256) {
4571                         if (!acpi_ec_write(i, v))
4572                                 return -EIO;
4573                 } else
4574                         return -EINVAL;
4575         }
4576
4577         return 0;
4578 }
4579
4580 static struct ibm_struct ecdump_driver_data = {
4581         .name = "ecdump",
4582         .read = ecdump_read,
4583         .write = ecdump_write,
4584         .flags.experimental = 1,
4585 };
4586
4587 /*************************************************************************
4588  * Backlight/brightness subdriver
4589  */
4590
4591 #define TPACPI_BACKLIGHT_DEV_NAME "thinkpad_screen"
4592
4593 enum {
4594         TP_EC_BACKLIGHT = 0x31,
4595
4596         /* TP_EC_BACKLIGHT bitmasks */
4597         TP_EC_BACKLIGHT_LVLMSK = 0x1F,
4598         TP_EC_BACKLIGHT_CMDMSK = 0xE0,
4599         TP_EC_BACKLIGHT_MAPSW = 0x20,
4600 };
4601
4602 static struct backlight_device *ibm_backlight_device;
4603 static int brightness_mode;
4604 static unsigned int brightness_enable = 2; /* 2 = auto, 0 = no, 1 = yes */
4605
4606 static struct mutex brightness_mutex;
4607
4608 /*
4609  * ThinkPads can read brightness from two places: EC 0x31, or
4610  * CMOS NVRAM byte 0x5E, bits 0-3.
4611  *
4612  * EC 0x31 has the following layout
4613  *   Bit 7: unknown function
4614  *   Bit 6: unknown function
4615  *   Bit 5: Z: honour scale changes, NZ: ignore scale changes
4616  *   Bit 4: must be set to zero to avoid problems
4617  *   Bit 3-0: backlight brightness level
4618  *
4619  * brightness_get_raw returns status data in the EC 0x31 layout
4620  */
4621 static int brightness_get_raw(int *status)
4622 {
4623         u8 lec = 0, lcmos = 0, level = 0;
4624
4625         if (brightness_mode & 1) {
4626                 if (!acpi_ec_read(TP_EC_BACKLIGHT, &lec))
4627                         return -EIO;
4628                 level = lec & TP_EC_BACKLIGHT_LVLMSK;
4629         };
4630         if (brightness_mode & 2) {
4631                 lcmos = (nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS)
4632                          & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
4633                         >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
4634                 lcmos &= (tp_features.bright_16levels)? 0x0f : 0x07;
4635                 level = lcmos;
4636         }
4637
4638         if (brightness_mode == 3) {
4639                 *status = lec;  /* Prefer EC, CMOS is just a backing store */
4640                 lec &= TP_EC_BACKLIGHT_LVLMSK;
4641                 if (lec == lcmos)
4642                         tp_warned.bright_cmos_ec_unsync = 0;
4643                 else {
4644                         if (!tp_warned.bright_cmos_ec_unsync) {
4645                                 printk(TPACPI_ERR
4646                                         "CMOS NVRAM (%u) and EC (%u) do not "
4647                                         "agree on display brightness level\n",
4648                                         (unsigned int) lcmos,
4649                                         (unsigned int) lec);
4650                                 tp_warned.bright_cmos_ec_unsync = 1;
4651                         }
4652                         return -EIO;
4653                 }
4654         } else {
4655                 *status = level;
4656         }
4657
4658         return 0;
4659 }
4660
4661 /* May return EINTR which can always be mapped to ERESTARTSYS */
4662 static int brightness_set(int value)
4663 {
4664         int cmos_cmd, inc, i, res;
4665         int current_value;
4666         int command_bits;
4667
4668         if (value > ((tp_features.bright_16levels)? 15 : 7) ||
4669             value < 0)
4670                 return -EINVAL;
4671
4672         res = mutex_lock_interruptible(&brightness_mutex);
4673         if (res < 0)
4674                 return res;
4675
4676         res = brightness_get_raw(&current_value);
4677         if (res < 0)
4678                 goto errout;
4679
4680         command_bits = current_value & TP_EC_BACKLIGHT_CMDMSK;
4681         current_value &= TP_EC_BACKLIGHT_LVLMSK;
4682
4683         cmos_cmd = value > current_value ?
4684                         TP_CMOS_BRIGHTNESS_UP :
4685                         TP_CMOS_BRIGHTNESS_DOWN;
4686         inc = (value > current_value)? 1 : -1;
4687
4688         res = 0;
4689         for (i = current_value; i != value; i += inc) {
4690                 if ((brightness_mode & 2) &&
4691                     issue_thinkpad_cmos_command(cmos_cmd)) {
4692                         res = -EIO;
4693                         goto errout;
4694                 }
4695                 if ((brightness_mode & 1) &&
4696                     !acpi_ec_write(TP_EC_BACKLIGHT,
4697                                    (i + inc) | command_bits)) {
4698                         res = -EIO;
4699                         goto errout;;
4700                 }
4701         }
4702
4703 errout:
4704         mutex_unlock(&brightness_mutex);
4705         return res;
4706 }
4707
4708 /* sysfs backlight class ----------------------------------------------- */
4709
4710 static int brightness_update_status(struct backlight_device *bd)
4711 {
4712         /* it is the backlight class's job (caller) to handle
4713          * EINTR and other errors properly */
4714         return brightness_set(
4715                 (bd->props.fb_blank == FB_BLANK_UNBLANK &&
4716                  bd->props.power == FB_BLANK_UNBLANK) ?
4717                                 bd->props.brightness : 0);
4718 }
4719
4720 static int brightness_get(struct backlight_device *bd)
4721 {
4722         int status, res;
4723
4724         res = brightness_get_raw(&status);
4725         if (res < 0)
4726                 return 0; /* FIXME: teach backlight about error handling */
4727
4728         return status & TP_EC_BACKLIGHT_LVLMSK;
4729 }
4730
4731 static struct backlight_ops ibm_backlight_data = {
4732         .get_brightness = brightness_get,
4733         .update_status  = brightness_update_status,
4734 };
4735
4736 /* --------------------------------------------------------------------- */
4737
4738 static int __init brightness_init(struct ibm_init_struct *iibm)
4739 {
4740         int b;
4741
4742         vdbg_printk(TPACPI_DBG_INIT, "initializing brightness subdriver\n");
4743
4744         mutex_init(&brightness_mutex);
4745
4746         /*
4747          * We always attempt to detect acpi support, so as to switch
4748          * Lenovo Vista BIOS to ACPI brightness mode even if we are not
4749          * going to publish a backlight interface
4750          */
4751         b = tpacpi_check_std_acpi_brightness_support();
4752         if (b > 0) {
4753                 if (thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO) {
4754                         printk(TPACPI_NOTICE
4755                                "Lenovo BIOS switched to ACPI backlight "
4756                                "control mode\n");
4757                 }
4758                 if (brightness_enable > 1) {
4759                         printk(TPACPI_NOTICE
4760                                "standard ACPI backlight interface "
4761                                "available, not loading native one...\n");
4762                         return 1;
4763                 }
4764         }
4765
4766         if (!brightness_enable) {
4767                 dbg_printk(TPACPI_DBG_INIT,
4768                            "brightness support disabled by "
4769                            "module parameter\n");
4770                 return 1;
4771         }
4772
4773         if (b > 16) {
4774                 printk(TPACPI_ERR
4775                        "Unsupported brightness interface, "
4776                        "please contact %s\n", TPACPI_MAIL);
4777                 return 1;
4778         }
4779         if (b == 16)
4780                 tp_features.bright_16levels = 1;
4781
4782         if (!brightness_mode) {
4783                 if (thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO)
4784                         brightness_mode = 2;
4785                 else
4786                         brightness_mode = 3;
4787
4788                 dbg_printk(TPACPI_DBG_INIT, "selected brightness_mode=%d\n",
4789                         brightness_mode);
4790         }
4791
4792         if (brightness_mode > 3)
4793                 return -EINVAL;
4794
4795         if (brightness_get_raw(&b) < 0)
4796                 return 1;
4797
4798         if (tp_features.bright_16levels)
4799                 printk(TPACPI_INFO
4800                        "detected a 16-level brightness capable ThinkPad\n");
4801
4802         ibm_backlight_device = backlight_device_register(
4803                                         TPACPI_BACKLIGHT_DEV_NAME, NULL, NULL,
4804                                         &ibm_backlight_data);
4805         if (IS_ERR(ibm_backlight_device)) {
4806                 printk(TPACPI_ERR "Could not register backlight device\n");
4807                 return PTR_ERR(ibm_backlight_device);
4808         }
4809         vdbg_printk(TPACPI_DBG_INIT, "brightness is supported\n");
4810
4811         ibm_backlight_device->props.max_brightness =
4812                                 (tp_features.bright_16levels)? 15 : 7;
4813         ibm_backlight_device->props.brightness = b & TP_EC_BACKLIGHT_LVLMSK;
4814         backlight_update_status(ibm_backlight_device);
4815
4816         return 0;
4817 }
4818
4819 static void brightness_exit(void)
4820 {
4821         if (ibm_backlight_device) {
4822                 vdbg_printk(TPACPI_DBG_EXIT,
4823                             "calling backlight_device_unregister()\n");
4824                 backlight_device_unregister(ibm_backlight_device);
4825         }
4826 }
4827
4828 static int brightness_read(char *p)
4829 {
4830         int len = 0;
4831         int level;
4832
4833         level = brightness_get(NULL);
4834         if (level < 0) {
4835                 len += sprintf(p + len, "level:\t\tunreadable\n");
4836         } else {
4837                 len += sprintf(p + len, "level:\t\t%d\n", level);
4838                 len += sprintf(p + len, "commands:\tup, down\n");
4839                 len += sprintf(p + len, "commands:\tlevel <level>"
4840                                " (<level> is 0-%d)\n",
4841                                (tp_features.bright_16levels) ? 15 : 7);
4842         }
4843
4844         return len;
4845 }
4846
4847 static int brightness_write(char *buf)
4848 {
4849         int level;
4850         int rc;
4851         char *cmd;
4852         int max_level = (tp_features.bright_16levels) ? 15 : 7;
4853
4854         level = brightness_get(NULL);
4855         if (level < 0)
4856                 return level;
4857
4858         while ((cmd = next_cmd(&buf))) {
4859                 if (strlencmp(cmd, "up") == 0) {
4860                         if (level < max_level)
4861                                 level++;
4862                 } else if (strlencmp(cmd, "down") == 0) {
4863                         if (level > 0)
4864                                 level--;
4865                 } else if (sscanf(cmd, "level %d", &level) == 1 &&
4866                            level >= 0 && level <= max_level) {
4867                         /* new level set */
4868                 } else
4869                         return -EINVAL;
4870         }
4871
4872         /*
4873          * Now we know what the final level should be, so we try to set it.
4874          * Doing it this way makes the syscall restartable in case of EINTR
4875          */
4876         rc = brightness_set(level);
4877         return (rc == -EINTR)? ERESTARTSYS : rc;
4878 }
4879
4880 static struct ibm_struct brightness_driver_data = {
4881         .name = "brightness",
4882         .read = brightness_read,
4883         .write = brightness_write,
4884         .exit = brightness_exit,
4885 };
4886
4887 /*************************************************************************
4888  * Volume subdriver
4889  */
4890
4891 static int volume_offset = 0x30;
4892
4893 static int volume_read(char *p)
4894 {
4895         int len = 0;
4896         u8 level;
4897
4898         if (!acpi_ec_read(volume_offset, &level)) {
4899                 len += sprintf(p + len, "level:\t\tunreadable\n");
4900         } else {
4901                 len += sprintf(p + len, "level:\t\t%d\n", level & 0xf);
4902                 len += sprintf(p + len, "mute:\t\t%s\n", onoff(level, 6));
4903                 len += sprintf(p + len, "commands:\tup, down, mute\n");
4904                 len += sprintf(p + len, "commands:\tlevel <level>"
4905                                " (<level> is 0-15)\n");
4906         }
4907
4908         return len;
4909 }
4910
4911 static int volume_write(char *buf)
4912 {
4913         int cmos_cmd, inc, i;
4914         u8 level, mute;
4915         int new_level, new_mute;
4916         char *cmd;
4917
4918         while ((cmd = next_cmd(&buf))) {
4919                 if (!acpi_ec_read(volume_offset, &level))
4920                         return -EIO;
4921                 new_mute = mute = level & 0x40;
4922                 new_level = level = level & 0xf;
4923
4924                 if (strlencmp(cmd, "up") == 0) {
4925                         if (mute)
4926                                 new_mute = 0;
4927                         else
4928                                 new_level = level == 15 ? 15 : level + 1;
4929                 } else if (strlencmp(cmd, "down") == 0) {
4930                         if (mute)
4931                                 new_mute = 0;
4932                         else
4933                                 new_level = level == 0 ? 0 : level - 1;
4934                 } else if (sscanf(cmd, "level %d", &new_level) == 1 &&
4935                            new_level >= 0 && new_level <= 15) {
4936                         /* new_level set */
4937                 } else if (strlencmp(cmd, "mute") == 0) {
4938                         new_mute = 0x40;
4939                 } else
4940                         return -EINVAL;
4941
4942                 if (new_level != level) {
4943                         /* mute doesn't change */
4944
4945                         cmos_cmd = (new_level > level) ?
4946                                         TP_CMOS_VOLUME_UP : TP_CMOS_VOLUME_DOWN;
4947                         inc = new_level > level ? 1 : -1;
4948
4949                         if (mute && (issue_thinkpad_cmos_command(cmos_cmd) ||
4950                                      !acpi_ec_write(volume_offset, level)))
4951                                 return -EIO;
4952
4953                         for (i = level; i != new_level; i += inc)
4954                                 if (issue_thinkpad_cmos_command(cmos_cmd) ||
4955                                     !acpi_ec_write(volume_offset, i + inc))
4956                                         return -EIO;
4957
4958                         if (mute &&
4959                             (issue_thinkpad_cmos_command(TP_CMOS_VOLUME_MUTE) ||
4960                              !acpi_ec_write(volume_offset, new_level + mute))) {
4961                                 return -EIO;
4962                         }
4963                 }
4964
4965                 if (new_mute != mute) {
4966                         /* level doesn't change */
4967
4968                         cmos_cmd = (new_mute) ?
4969                                    TP_CMOS_VOLUME_MUTE : TP_CMOS_VOLUME_UP;
4970
4971                         if (issue_thinkpad_cmos_command(cmos_cmd) ||
4972                             !acpi_ec_write(volume_offset, level + new_mute))
4973                                 return -EIO;
4974                 }
4975         }
4976
4977         return 0;
4978 }
4979
4980 static struct ibm_struct volume_driver_data = {
4981         .name = "volume",
4982         .read = volume_read,
4983         .write = volume_write,
4984 };
4985
4986 /*************************************************************************
4987  * Fan subdriver
4988  */
4989
4990 /*
4991  * FAN ACCESS MODES
4992  *
4993  * TPACPI_FAN_RD_ACPI_GFAN:
4994  *      ACPI GFAN method: returns fan level
4995  *
4996  *      see TPACPI_FAN_WR_ACPI_SFAN
4997  *      EC 0x2f (HFSP) not available if GFAN exists
4998  *
4999  * TPACPI_FAN_WR_ACPI_SFAN:
5000  *      ACPI SFAN method: sets fan level, 0 (stop) to 7 (max)
5001  *
5002  *      EC 0x2f (HFSP) might be available *for reading*, but do not use
5003  *      it for writing.
5004  *
5005  * TPACPI_FAN_WR_TPEC:
5006  *      ThinkPad EC register 0x2f (HFSP): fan control loop mode
5007  *      Supported on almost all ThinkPads
5008  *
5009  *      Fan speed changes of any sort (including those caused by the
5010  *      disengaged mode) are usually done slowly by the firmware as the
5011  *      maximum ammount of fan duty cycle change per second seems to be
5012  *      limited.
5013  *
5014  *      Reading is not available if GFAN exists.
5015  *      Writing is not available if SFAN exists.
5016  *
5017  *      Bits
5018  *       7      automatic mode engaged;
5019  *              (default operation mode of the ThinkPad)
5020  *              fan level is ignored in this mode.
5021  *       6      full speed mode (takes precedence over bit 7);
5022  *              not available on all thinkpads.  May disable
5023  *              the tachometer while the fan controller ramps up
5024  *              the speed (which can take up to a few *minutes*).
5025  *              Speeds up fan to 100% duty-cycle, which is far above
5026  *              the standard RPM levels.  It is not impossible that
5027  *              it could cause hardware damage.
5028  *      5-3     unused in some models.  Extra bits for fan level
5029  *              in others, but still useless as all values above
5030  *              7 map to the same speed as level 7 in these models.
5031  *      2-0     fan level (0..7 usually)
5032  *                      0x00 = stop
5033  *                      0x07 = max (set when temperatures critical)
5034  *              Some ThinkPads may have other levels, see
5035  *              TPACPI_FAN_WR_ACPI_FANS (X31/X40/X41)
5036  *
5037  *      FIRMWARE BUG: on some models, EC 0x2f might not be initialized at
5038  *      boot. Apparently the EC does not intialize it, so unless ACPI DSDT
5039  *      does so, its initial value is meaningless (0x07).
5040  *
5041  *      For firmware bugs, refer to:
5042  *      http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
5043  *
5044  *      ----
5045  *
5046  *      ThinkPad EC register 0x84 (LSB), 0x85 (MSB):
5047  *      Main fan tachometer reading (in RPM)
5048  *
5049  *      This register is present on all ThinkPads with a new-style EC, and
5050  *      it is known not to be present on the A21m/e, and T22, as there is
5051  *      something else in offset 0x84 according to the ACPI DSDT.  Other
5052  *      ThinkPads from this same time period (and earlier) probably lack the
5053  *      tachometer as well.
5054  *
5055  *      Unfortunately a lot of ThinkPads with new-style ECs but whose firwmare
5056  *      was never fixed by IBM to report the EC firmware version string
5057  *      probably support the tachometer (like the early X models), so
5058  *      detecting it is quite hard.  We need more data to know for sure.
5059  *
5060  *      FIRMWARE BUG: always read 0x84 first, otherwise incorrect readings
5061  *      might result.
5062  *
5063  *      FIRMWARE BUG: may go stale while the EC is switching to full speed
5064  *      mode.
5065  *
5066  *      For firmware bugs, refer to:
5067  *      http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
5068  *
5069  * TPACPI_FAN_WR_ACPI_FANS:
5070  *      ThinkPad X31, X40, X41.  Not available in the X60.
5071  *
5072  *      FANS ACPI handle: takes three arguments: low speed, medium speed,
5073  *      high speed.  ACPI DSDT seems to map these three speeds to levels
5074  *      as follows: STOP LOW LOW MED MED HIGH HIGH HIGH HIGH
5075  *      (this map is stored on FAN0..FAN8 as "0,1,1,2,2,3,3,3,3")
5076  *
5077  *      The speeds are stored on handles
5078  *      (FANA:FAN9), (FANC:FANB), (FANE:FAND).
5079  *
5080  *      There are three default speed sets, acessible as handles:
5081  *      FS1L,FS1M,FS1H; FS2L,FS2M,FS2H; FS3L,FS3M,FS3H
5082  *
5083  *      ACPI DSDT switches which set is in use depending on various
5084  *      factors.
5085  *
5086  *      TPACPI_FAN_WR_TPEC is also available and should be used to
5087  *      command the fan.  The X31/X40/X41 seems to have 8 fan levels,
5088  *      but the ACPI tables just mention level 7.
5089  */
5090
5091 enum {                                  /* Fan control constants */
5092         fan_status_offset = 0x2f,       /* EC register 0x2f */
5093         fan_rpm_offset = 0x84,          /* EC register 0x84: LSB, 0x85 MSB (RPM)
5094                                          * 0x84 must be read before 0x85 */
5095
5096         TP_EC_FAN_FULLSPEED = 0x40,     /* EC fan mode: full speed */
5097         TP_EC_FAN_AUTO      = 0x80,     /* EC fan mode: auto fan control */
5098
5099         TPACPI_FAN_LAST_LEVEL = 0x100,  /* Use cached last-seen fan level */
5100 };
5101
5102 enum fan_status_access_mode {
5103         TPACPI_FAN_NONE = 0,            /* No fan status or control */
5104         TPACPI_FAN_RD_ACPI_GFAN,        /* Use ACPI GFAN */
5105         TPACPI_FAN_RD_TPEC,             /* Use ACPI EC regs 0x2f, 0x84-0x85 */
5106 };
5107
5108 enum fan_control_access_mode {
5109         TPACPI_FAN_WR_NONE = 0,         /* No fan control */
5110         TPACPI_FAN_WR_ACPI_SFAN,        /* Use ACPI SFAN */
5111         TPACPI_FAN_WR_TPEC,             /* Use ACPI EC reg 0x2f */
5112         TPACPI_FAN_WR_ACPI_FANS,        /* Use ACPI FANS and EC reg 0x2f */
5113 };
5114
5115 enum fan_control_commands {
5116         TPACPI_FAN_CMD_SPEED    = 0x0001,       /* speed command */
5117         TPACPI_FAN_CMD_LEVEL    = 0x0002,       /* level command  */
5118         TPACPI_FAN_CMD_ENABLE   = 0x0004,       /* enable/disable cmd,
5119                                                  * and also watchdog cmd */
5120 };
5121
5122 static int fan_control_allowed;
5123
5124 static enum fan_status_access_mode fan_status_access_mode;
5125 static enum fan_control_access_mode fan_control_access_mode;
5126 static enum fan_control_commands fan_control_commands;
5127
5128 static u8 fan_control_initial_status;
5129 static u8 fan_control_desired_level;
5130 static int fan_watchdog_maxinterval;
5131
5132 static struct mutex fan_mutex;
5133
5134 static void fan_watchdog_fire(struct work_struct *ignored);
5135 static DECLARE_DELAYED_WORK(fan_watchdog_task, fan_watchdog_fire);
5136
5137 TPACPI_HANDLE(fans, ec, "FANS");        /* X31, X40, X41 */
5138 TPACPI_HANDLE(gfan, ec, "GFAN", /* 570 */
5139            "\\FSPD",            /* 600e/x, 770e, 770x */
5140            );                   /* all others */
5141 TPACPI_HANDLE(sfan, ec, "SFAN", /* 570 */
5142            "JFNS",              /* 770x-JL */
5143            );                   /* all others */
5144
5145 /*
5146  * Call with fan_mutex held
5147  */
5148 static void fan_update_desired_level(u8 status)
5149 {
5150         if ((status &
5151              (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
5152                 if (status > 7)
5153                         fan_control_desired_level = 7;
5154                 else
5155                         fan_control_desired_level = status;
5156         }
5157 }
5158
5159 static int fan_get_status(u8 *status)
5160 {
5161         u8 s;
5162
5163         /* TODO:
5164          * Add TPACPI_FAN_RD_ACPI_FANS ? */
5165
5166         switch (fan_status_access_mode) {
5167         case TPACPI_FAN_RD_ACPI_GFAN:
5168                 /* 570, 600e/x, 770e, 770x */
5169
5170                 if (unlikely(!acpi_evalf(gfan_handle, &s, NULL, "d")))
5171                         return -EIO;
5172
5173                 if (likely(status))
5174                         *status = s & 0x07;
5175
5176                 break;
5177
5178         case TPACPI_FAN_RD_TPEC:
5179                 /* all except 570, 600e/x, 770e, 770x */
5180                 if (unlikely(!acpi_ec_read(fan_status_offset, &s)))
5181                         return -EIO;
5182
5183                 if (likely(status))
5184                         *status = s;
5185
5186                 break;
5187
5188         default:
5189                 return -ENXIO;
5190         }
5191
5192         return 0;
5193 }
5194
5195 static int fan_get_status_safe(u8 *status)
5196 {
5197         int rc;
5198         u8 s;
5199
5200         if (mutex_lock_interruptible(&fan_mutex))
5201                 return -ERESTARTSYS;
5202         rc = fan_get_status(&s);
5203         if (!rc)
5204                 fan_update_desired_level(s);
5205         mutex_unlock(&fan_mutex);
5206
5207         if (status)
5208                 *status = s;
5209
5210         return rc;
5211 }
5212
5213 static int fan_get_speed(unsigned int *speed)
5214 {
5215         u8 hi, lo;
5216
5217         switch (fan_status_access_mode) {
5218         case TPACPI_FAN_RD_TPEC:
5219                 /* all except 570, 600e/x, 770e, 770x */
5220                 if (unlikely(!acpi_ec_read(fan_rpm_offset, &lo) ||
5221                              !acpi_ec_read(fan_rpm_offset + 1, &hi)))
5222                         return -EIO;
5223
5224                 if (likely(speed))
5225                         *speed = (hi << 8) | lo;
5226
5227                 break;
5228
5229         default:
5230                 return -ENXIO;
5231         }
5232
5233         return 0;
5234 }
5235
5236 static int fan_set_level(int level)
5237 {
5238         if (!fan_control_allowed)
5239                 return -EPERM;
5240
5241         switch (fan_control_access_mode) {
5242         case TPACPI_FAN_WR_ACPI_SFAN:
5243                 if (level >= 0 && level <= 7) {
5244                         if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level))
5245                                 return -EIO;
5246                 } else
5247                         return -EINVAL;
5248                 break;
5249
5250         case TPACPI_FAN_WR_ACPI_FANS:
5251         case TPACPI_FAN_WR_TPEC:
5252                 if ((level != TP_EC_FAN_AUTO) &&
5253                     (level != TP_EC_FAN_FULLSPEED) &&
5254                     ((level < 0) || (level > 7)))
5255                         return -EINVAL;
5256
5257                 /* safety net should the EC not support AUTO
5258                  * or FULLSPEED mode bits and just ignore them */
5259                 if (level & TP_EC_FAN_FULLSPEED)
5260                         level |= 7;     /* safety min speed 7 */
5261                 else if (level & TP_EC_FAN_AUTO)
5262                         level |= 4;     /* safety min speed 4 */
5263
5264                 if (!acpi_ec_write(fan_status_offset, level))
5265                         return -EIO;
5266                 else
5267                         tp_features.fan_ctrl_status_undef = 0;
5268                 break;
5269
5270         default:
5271                 return -ENXIO;
5272         }
5273         return 0;
5274 }
5275
5276 static int fan_set_level_safe(int level)
5277 {
5278         int rc;
5279
5280         if (!fan_control_allowed)
5281                 return -EPERM;
5282
5283         if (mutex_lock_interruptible(&fan_mutex))
5284                 return -ERESTARTSYS;
5285
5286         if (level == TPACPI_FAN_LAST_LEVEL)
5287                 level = fan_control_desired_level;
5288
5289         rc = fan_set_level(level);
5290         if (!rc)
5291                 fan_update_desired_level(level);
5292
5293         mutex_unlock(&fan_mutex);
5294         return rc;
5295 }
5296
5297 static int fan_set_enable(void)
5298 {
5299         u8 s;
5300         int rc;
5301
5302         if (!fan_control_allowed)
5303                 return -EPERM;
5304
5305         if (mutex_lock_interruptible(&fan_mutex))
5306                 return -ERESTARTSYS;
5307
5308         switch (fan_control_access_mode) {
5309         case TPACPI_FAN_WR_ACPI_FANS:
5310         case TPACPI_FAN_WR_TPEC:
5311                 rc = fan_get_status(&s);
5312                 if (rc < 0)
5313                         break;
5314
5315                 /* Don't go out of emergency fan mode */
5316                 if (s != 7) {
5317                         s &= 0x07;
5318                         s |= TP_EC_FAN_AUTO | 4; /* min fan speed 4 */
5319                 }
5320
5321                 if (!acpi_ec_write(fan_status_offset, s))
5322                         rc = -EIO;
5323                 else {
5324                         tp_features.fan_ctrl_status_undef = 0;
5325                         rc = 0;
5326                 }
5327                 break;
5328
5329         case TPACPI_FAN_WR_ACPI_SFAN:
5330                 rc = fan_get_status(&s);
5331                 if (rc < 0)
5332                         break;
5333
5334                 s &= 0x07;
5335
5336                 /* Set fan to at least level 4 */
5337                 s |= 4;
5338
5339                 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", s))
5340                         rc = -EIO;
5341                 else
5342                         rc = 0;
5343                 break;
5344
5345         default:
5346                 rc = -ENXIO;
5347         }
5348
5349         mutex_unlock(&fan_mutex);
5350         return rc;
5351 }
5352
5353 static int fan_set_disable(void)
5354 {
5355         int rc;
5356
5357         if (!fan_control_allowed)
5358                 return -EPERM;
5359
5360         if (mutex_lock_interruptible(&fan_mutex))
5361                 return -ERESTARTSYS;
5362
5363         rc = 0;
5364         switch (fan_control_access_mode) {
5365         case TPACPI_FAN_WR_ACPI_FANS:
5366         case TPACPI_FAN_WR_TPEC:
5367                 if (!acpi_ec_write(fan_status_offset, 0x00))
5368                         rc = -EIO;
5369                 else {
5370                         fan_control_desired_level = 0;
5371                         tp_features.fan_ctrl_status_undef = 0;
5372                 }
5373                 break;
5374
5375         case TPACPI_FAN_WR_ACPI_SFAN:
5376                 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", 0x00))
5377                         rc = -EIO;
5378                 else
5379                         fan_control_desired_level = 0;
5380                 break;
5381
5382         default:
5383                 rc = -ENXIO;
5384         }
5385
5386
5387         mutex_unlock(&fan_mutex);
5388         return rc;
5389 }
5390
5391 static int fan_set_speed(int speed)
5392 {
5393         int rc;
5394
5395         if (!fan_control_allowed)
5396                 return -EPERM;
5397
5398         if (mutex_lock_interruptible(&fan_mutex))
5399                 return -ERESTARTSYS;
5400
5401         rc = 0;
5402         switch (fan_control_access_mode) {
5403         case TPACPI_FAN_WR_ACPI_FANS:
5404                 if (speed >= 0 && speed <= 65535) {
5405                         if (!acpi_evalf(fans_handle, NULL, NULL, "vddd",
5406                                         speed, speed, speed))
5407                                 rc = -EIO;
5408                 } else
5409                         rc = -EINVAL;
5410                 break;
5411
5412         default:
5413                 rc = -ENXIO;
5414         }
5415
5416         mutex_unlock(&fan_mutex);
5417         return rc;
5418 }
5419
5420 static void fan_watchdog_reset(void)
5421 {
5422         static int fan_watchdog_active;
5423
5424         if (fan_control_access_mode == TPACPI_FAN_WR_NONE)
5425                 return;
5426
5427         if (fan_watchdog_active)
5428                 cancel_delayed_work(&fan_watchdog_task);
5429
5430         if (fan_watchdog_maxinterval > 0 &&
5431             tpacpi_lifecycle != TPACPI_LIFE_EXITING) {
5432                 fan_watchdog_active = 1;
5433                 if (!queue_delayed_work(tpacpi_wq, &fan_watchdog_task,
5434                                 msecs_to_jiffies(fan_watchdog_maxinterval
5435                                                  * 1000))) {
5436                         printk(TPACPI_ERR
5437                                "failed to queue the fan watchdog, "
5438                                "watchdog will not trigger\n");
5439                 }
5440         } else
5441                 fan_watchdog_active = 0;
5442 }
5443
5444 static void fan_watchdog_fire(struct work_struct *ignored)
5445 {
5446         int rc;
5447
5448         if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
5449                 return;
5450
5451         printk(TPACPI_NOTICE "fan watchdog: enabling fan\n");
5452         rc = fan_set_enable();
5453         if (rc < 0) {
5454                 printk(TPACPI_ERR "fan watchdog: error %d while enabling fan, "
5455                         "will try again later...\n", -rc);
5456                 /* reschedule for later */
5457                 fan_watchdog_reset();
5458         }
5459 }
5460
5461 /*
5462  * SYSFS fan layout: hwmon compatible (device)
5463  *
5464  * pwm*_enable:
5465  *      0: "disengaged" mode
5466  *      1: manual mode
5467  *      2: native EC "auto" mode (recommended, hardware default)
5468  *
5469  * pwm*: set speed in manual mode, ignored otherwise.
5470  *      0 is level 0; 255 is level 7. Intermediate points done with linear
5471  *      interpolation.
5472  *
5473  * fan*_input: tachometer reading, RPM
5474  *
5475  *
5476  * SYSFS fan layout: extensions
5477  *
5478  * fan_watchdog (driver):
5479  *      fan watchdog interval in seconds, 0 disables (default), max 120
5480  */
5481
5482 /* sysfs fan pwm1_enable ----------------------------------------------- */
5483 static ssize_t fan_pwm1_enable_show(struct device *dev,
5484                                     struct device_attribute *attr,
5485                                     char *buf)
5486 {
5487         int res, mode;
5488         u8 status;
5489
5490         res = fan_get_status_safe(&status);
5491         if (res)
5492                 return res;
5493
5494         if (unlikely(tp_features.fan_ctrl_status_undef)) {
5495                 if (status != fan_control_initial_status) {
5496                         tp_features.fan_ctrl_status_undef = 0;
5497                 } else {
5498                         /* Return most likely status. In fact, it
5499                          * might be the only possible status */
5500                         status = TP_EC_FAN_AUTO;
5501                 }
5502         }
5503
5504         if (status & TP_EC_FAN_FULLSPEED) {
5505                 mode = 0;
5506         } else if (status & TP_EC_FAN_AUTO) {
5507                 mode = 2;
5508         } else
5509                 mode = 1;
5510
5511         return snprintf(buf, PAGE_SIZE, "%d\n", mode);
5512 }
5513
5514 static ssize_t fan_pwm1_enable_store(struct device *dev,
5515                                      struct device_attribute *attr,
5516                                      const char *buf, size_t count)
5517 {
5518         unsigned long t;
5519         int res, level;
5520
5521         if (parse_strtoul(buf, 2, &t))
5522                 return -EINVAL;
5523
5524         switch (t) {
5525         case 0:
5526                 level = TP_EC_FAN_FULLSPEED;
5527                 break;
5528         case 1:
5529                 level = TPACPI_FAN_LAST_LEVEL;
5530                 break;
5531         case 2:
5532                 level = TP_EC_FAN_AUTO;
5533                 break;
5534         case 3:
5535                 /* reserved for software-controlled auto mode */
5536                 return -ENOSYS;
5537         default:
5538                 return -EINVAL;
5539         }
5540
5541         res = fan_set_level_safe(level);
5542         if (res == -ENXIO)
5543                 return -EINVAL;
5544         else if (res < 0)
5545                 return res;
5546
5547         fan_watchdog_reset();
5548
5549         return count;
5550 }
5551
5552 static struct device_attribute dev_attr_fan_pwm1_enable =
5553         __ATTR(pwm1_enable, S_IWUSR | S_IRUGO,
5554                 fan_pwm1_enable_show, fan_pwm1_enable_store);
5555
5556 /* sysfs fan pwm1 ------------------------------------------------------ */
5557 static ssize_t fan_pwm1_show(struct device *dev,
5558                              struct device_attribute *attr,
5559                              char *buf)
5560 {
5561         int res;
5562         u8 status;
5563
5564         res = fan_get_status_safe(&status);
5565         if (res)
5566                 return res;
5567
5568         if (unlikely(tp_features.fan_ctrl_status_undef)) {
5569                 if (status != fan_control_initial_status) {
5570                         tp_features.fan_ctrl_status_undef = 0;
5571                 } else {
5572                         status = TP_EC_FAN_AUTO;
5573                 }
5574         }
5575
5576         if ((status &
5577              (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) != 0)
5578                 status = fan_control_desired_level;
5579
5580         if (status > 7)
5581                 status = 7;
5582
5583         return snprintf(buf, PAGE_SIZE, "%u\n", (status * 255) / 7);
5584 }
5585
5586 static ssize_t fan_pwm1_store(struct device *dev,
5587                               struct device_attribute *attr,
5588                               const char *buf, size_t count)
5589 {
5590         unsigned long s;
5591         int rc;
5592         u8 status, newlevel;
5593
5594         if (parse_strtoul(buf, 255, &s))
5595                 return -EINVAL;
5596
5597         /* scale down from 0-255 to 0-7 */
5598         newlevel = (s >> 5) & 0x07;
5599
5600         if (mutex_lock_interruptible(&fan_mutex))
5601                 return -ERESTARTSYS;
5602
5603         rc = fan_get_status(&status);
5604         if (!rc && (status &
5605                     (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
5606                 rc = fan_set_level(newlevel);
5607                 if (rc == -ENXIO)
5608                         rc = -EINVAL;
5609                 else if (!rc) {
5610                         fan_update_desired_level(newlevel);
5611                         fan_watchdog_reset();
5612                 }
5613         }
5614
5615         mutex_unlock(&fan_mutex);
5616         return (rc)? rc : count;
5617 }
5618
5619 static struct device_attribute dev_attr_fan_pwm1 =
5620         __ATTR(pwm1, S_IWUSR | S_IRUGO,
5621                 fan_pwm1_show, fan_pwm1_store);
5622
5623 /* sysfs fan fan1_input ------------------------------------------------ */
5624 static ssize_t fan_fan1_input_show(struct device *dev,
5625                            struct device_attribute *attr,
5626                            char *buf)
5627 {
5628         int res;
5629         unsigned int speed;
5630
5631         res = fan_get_speed(&speed);
5632         if (res < 0)
5633                 return res;
5634
5635         return snprintf(buf, PAGE_SIZE, "%u\n", speed);
5636 }
5637
5638 static struct device_attribute dev_attr_fan_fan1_input =
5639         __ATTR(fan1_input, S_IRUGO,
5640                 fan_fan1_input_show, NULL);
5641
5642 /* sysfs fan fan_watchdog (hwmon driver) ------------------------------- */
5643 static ssize_t fan_fan_watchdog_show(struct device_driver *drv,
5644                                      char *buf)
5645 {
5646         return snprintf(buf, PAGE_SIZE, "%u\n", fan_watchdog_maxinterval);
5647 }
5648
5649 static ssize_t fan_fan_watchdog_store(struct device_driver *drv,
5650                                       const char *buf, size_t count)
5651 {
5652         unsigned long t;
5653
5654         if (parse_strtoul(buf, 120, &t))
5655                 return -EINVAL;
5656
5657         if (!fan_control_allowed)
5658                 return -EPERM;
5659
5660         fan_watchdog_maxinterval = t;
5661         fan_watchdog_reset();
5662
5663         return count;
5664 }
5665
5666 static DRIVER_ATTR(fan_watchdog, S_IWUSR | S_IRUGO,
5667                 fan_fan_watchdog_show, fan_fan_watchdog_store);
5668
5669 /* --------------------------------------------------------------------- */
5670 static struct attribute *fan_attributes[] = {
5671         &dev_attr_fan_pwm1_enable.attr, &dev_attr_fan_pwm1.attr,
5672         &dev_attr_fan_fan1_input.attr,
5673         NULL
5674 };
5675
5676 static const struct attribute_group fan_attr_group = {
5677         .attrs = fan_attributes,
5678 };
5679
5680 static int __init fan_init(struct ibm_init_struct *iibm)
5681 {
5682         int rc;
5683
5684         vdbg_printk(TPACPI_DBG_INIT, "initializing fan subdriver\n");
5685
5686         mutex_init(&fan_mutex);
5687         fan_status_access_mode = TPACPI_FAN_NONE;
5688         fan_control_access_mode = TPACPI_FAN_WR_NONE;
5689         fan_control_commands = 0;
5690         fan_watchdog_maxinterval = 0;
5691         tp_features.fan_ctrl_status_undef = 0;
5692         fan_control_desired_level = 7;
5693
5694         TPACPI_ACPIHANDLE_INIT(fans);
5695         TPACPI_ACPIHANDLE_INIT(gfan);
5696         TPACPI_ACPIHANDLE_INIT(sfan);
5697
5698         if (gfan_handle) {
5699                 /* 570, 600e/x, 770e, 770x */
5700                 fan_status_access_mode = TPACPI_FAN_RD_ACPI_GFAN;
5701         } else {
5702                 /* all other ThinkPads: note that even old-style
5703                  * ThinkPad ECs supports the fan control register */
5704                 if (likely(acpi_ec_read(fan_status_offset,
5705                                         &fan_control_initial_status))) {
5706                         fan_status_access_mode = TPACPI_FAN_RD_TPEC;
5707
5708                         /* In some ThinkPads, neither the EC nor the ACPI
5709                          * DSDT initialize the fan status, and it ends up
5710                          * being set to 0x07 when it *could* be either
5711                          * 0x07 or 0x80.
5712                          *
5713                          * Enable for TP-1Y (T43), TP-78 (R51e),
5714                          * TP-76 (R52), TP-70 (T43, R52), which are known
5715                          * to be buggy. */
5716                         if (fan_control_initial_status == 0x07) {
5717                                 switch (thinkpad_id.ec_model) {
5718                                 case 0x5931: /* TP-1Y */
5719                                 case 0x3837: /* TP-78 */
5720                                 case 0x3637: /* TP-76 */
5721                                 case 0x3037: /* TP-70 */
5722                                         printk(TPACPI_NOTICE
5723                                                "fan_init: initial fan status "
5724                                                "is unknown, assuming it is "
5725                                                "in auto mode\n");
5726                                         tp_features.fan_ctrl_status_undef = 1;
5727                                         ;;
5728                                 }
5729                         }
5730                 } else {
5731                         printk(TPACPI_ERR
5732                                "ThinkPad ACPI EC access misbehaving, "
5733                                "fan status and control unavailable\n");
5734                         return 1;
5735                 }
5736         }
5737
5738         if (sfan_handle) {
5739                 /* 570, 770x-JL */
5740                 fan_control_access_mode = TPACPI_FAN_WR_ACPI_SFAN;
5741                 fan_control_commands |=
5742                     TPACPI_FAN_CMD_LEVEL | TPACPI_FAN_CMD_ENABLE;
5743         } else {
5744                 if (!gfan_handle) {
5745                         /* gfan without sfan means no fan control */
5746                         /* all other models implement TP EC 0x2f control */
5747
5748                         if (fans_handle) {
5749                                 /* X31, X40, X41 */
5750                                 fan_control_access_mode =
5751                                     TPACPI_FAN_WR_ACPI_FANS;
5752                                 fan_control_commands |=
5753                                     TPACPI_FAN_CMD_SPEED |
5754                                     TPACPI_FAN_CMD_LEVEL |
5755                                     TPACPI_FAN_CMD_ENABLE;
5756                         } else {
5757                                 fan_control_access_mode = TPACPI_FAN_WR_TPEC;
5758                                 fan_control_commands |=
5759                                     TPACPI_FAN_CMD_LEVEL |
5760                                     TPACPI_FAN_CMD_ENABLE;
5761                         }
5762                 }
5763         }
5764
5765         vdbg_printk(TPACPI_DBG_INIT, "fan is %s, modes %d, %d\n",
5766                 str_supported(fan_status_access_mode != TPACPI_FAN_NONE ||
5767                   fan_control_access_mode != TPACPI_FAN_WR_NONE),
5768                 fan_status_access_mode, fan_control_access_mode);
5769
5770         /* fan control master switch */
5771         if (!fan_control_allowed) {
5772                 fan_control_access_mode = TPACPI_FAN_WR_NONE;
5773                 fan_control_commands = 0;
5774                 dbg_printk(TPACPI_DBG_INIT,
5775                            "fan control features disabled by parameter\n");
5776         }
5777
5778         /* update fan_control_desired_level */
5779         if (fan_status_access_mode != TPACPI_FAN_NONE)
5780                 fan_get_status_safe(NULL);
5781
5782         if (fan_status_access_mode != TPACPI_FAN_NONE ||
5783             fan_control_access_mode != TPACPI_FAN_WR_NONE) {
5784                 rc = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
5785                                          &fan_attr_group);
5786                 if (rc < 0)
5787                         return rc;
5788
5789                 rc = driver_create_file(&tpacpi_hwmon_pdriver.driver,
5790                                         &driver_attr_fan_watchdog);
5791                 if (rc < 0) {
5792                         sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
5793                                         &fan_attr_group);
5794                         return rc;
5795                 }
5796                 return 0;
5797         } else
5798                 return 1;
5799 }
5800
5801 static void fan_exit(void)
5802 {
5803         vdbg_printk(TPACPI_DBG_EXIT,
5804                     "cancelling any pending fan watchdog tasks\n");
5805
5806         /* FIXME: can we really do this unconditionally? */
5807         sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj, &fan_attr_group);
5808         driver_remove_file(&tpacpi_hwmon_pdriver.driver,
5809                            &driver_attr_fan_watchdog);
5810
5811         cancel_delayed_work(&fan_watchdog_task);
5812         flush_workqueue(tpacpi_wq);
5813 }
5814
5815 static int fan_read(char *p)
5816 {
5817         int len = 0;
5818         int rc;
5819         u8 status;
5820         unsigned int speed = 0;
5821
5822         switch (fan_status_access_mode) {
5823         case TPACPI_FAN_RD_ACPI_GFAN:
5824                 /* 570, 600e/x, 770e, 770x */
5825                 rc = fan_get_status_safe(&status);
5826                 if (rc < 0)
5827                         return rc;
5828
5829                 len += sprintf(p + len, "status:\t\t%s\n"
5830                                "level:\t\t%d\n",
5831                                (status != 0) ? "enabled" : "disabled", status);
5832                 break;
5833
5834         case TPACPI_FAN_RD_TPEC:
5835                 /* all except 570, 600e/x, 770e, 770x */
5836                 rc = fan_get_status_safe(&status);
5837                 if (rc < 0)
5838                         return rc;
5839
5840                 if (unlikely(tp_features.fan_ctrl_status_undef)) {
5841                         if (status != fan_control_initial_status)
5842                                 tp_features.fan_ctrl_status_undef = 0;
5843                         else
5844                                 /* Return most likely status. In fact, it
5845                                  * might be the only possible status */
5846                                 status = TP_EC_FAN_AUTO;
5847                 }
5848
5849                 len += sprintf(p + len, "status:\t\t%s\n",
5850                                (status != 0) ? "enabled" : "disabled");
5851
5852                 rc = fan_get_speed(&speed);
5853                 if (rc < 0)
5854                         return rc;
5855
5856                 len += sprintf(p + len, "speed:\t\t%d\n", speed);
5857
5858                 if (status & TP_EC_FAN_FULLSPEED)
5859                         /* Disengaged mode takes precedence */
5860                         len += sprintf(p + len, "level:\t\tdisengaged\n");
5861                 else if (status & TP_EC_FAN_AUTO)
5862                         len += sprintf(p + len, "level:\t\tauto\n");
5863                 else
5864                         len += sprintf(p + len, "level:\t\t%d\n", status);
5865                 break;
5866
5867         case TPACPI_FAN_NONE:
5868         default:
5869                 len += sprintf(p + len, "status:\t\tnot supported\n");
5870         }
5871
5872         if (fan_control_commands & TPACPI_FAN_CMD_LEVEL) {
5873                 len += sprintf(p + len, "commands:\tlevel <level>");
5874
5875                 switch (fan_control_access_mode) {
5876                 case TPACPI_FAN_WR_ACPI_SFAN:
5877                         len += sprintf(p + len, " (<level> is 0-7)\n");
5878                         break;
5879
5880                 default:
5881                         len += sprintf(p + len, " (<level> is 0-7, "
5882                                        "auto, disengaged, full-speed)\n");
5883                         break;
5884                 }
5885         }
5886
5887         if (fan_control_commands & TPACPI_FAN_CMD_ENABLE)
5888                 len += sprintf(p + len, "commands:\tenable, disable\n"
5889                                "commands:\twatchdog <timeout> (<timeout> "
5890                                "is 0 (off), 1-120 (seconds))\n");
5891
5892         if (fan_control_commands & TPACPI_FAN_CMD_SPEED)
5893                 len += sprintf(p + len, "commands:\tspeed <speed>"
5894                                " (<speed> is 0-65535)\n");
5895
5896         return len;
5897 }
5898
5899 static int fan_write_cmd_level(const char *cmd, int *rc)
5900 {
5901         int level;
5902
5903         if (strlencmp(cmd, "level auto") == 0)
5904                 level = TP_EC_FAN_AUTO;
5905         else if ((strlencmp(cmd, "level disengaged") == 0) |
5906                         (strlencmp(cmd, "level full-speed") == 0))
5907                 level = TP_EC_FAN_FULLSPEED;
5908         else if (sscanf(cmd, "level %d", &level) != 1)
5909                 return 0;
5910
5911         *rc = fan_set_level_safe(level);
5912         if (*rc == -ENXIO)
5913                 printk(TPACPI_ERR "level command accepted for unsupported "
5914                        "access mode %d", fan_control_access_mode);
5915
5916         return 1;
5917 }
5918
5919 static int fan_write_cmd_enable(const char *cmd, int *rc)
5920 {
5921         if (strlencmp(cmd, "enable") != 0)
5922                 return 0;
5923
5924         *rc = fan_set_enable();
5925         if (*rc == -ENXIO)
5926                 printk(TPACPI_ERR "enable command accepted for unsupported "
5927                        "access mode %d", fan_control_access_mode);
5928
5929         return 1;
5930 }
5931
5932 static int fan_write_cmd_disable(const char *cmd, int *rc)
5933 {
5934         if (strlencmp(cmd, "disable") != 0)
5935                 return 0;
5936
5937         *rc = fan_set_disable();
5938         if (*rc == -ENXIO)
5939                 printk(TPACPI_ERR "disable command accepted for unsupported "
5940                        "access mode %d", fan_control_access_mode);
5941
5942         return 1;
5943 }
5944
5945 static int fan_write_cmd_speed(const char *cmd, int *rc)
5946 {
5947         int speed;
5948
5949         /* TODO:
5950          * Support speed <low> <medium> <high> ? */
5951
5952         if (sscanf(cmd, "speed %d", &speed) != 1)
5953                 return 0;
5954
5955         *rc = fan_set_speed(speed);
5956         if (*rc == -ENXIO)
5957                 printk(TPACPI_ERR "speed command accepted for unsupported "
5958                        "access mode %d", fan_control_access_mode);
5959
5960         return 1;
5961 }
5962
5963 static int fan_write_cmd_watchdog(const char *cmd, int *rc)
5964 {
5965         int interval;
5966
5967         if (sscanf(cmd, "watchdog %d", &interval) != 1)
5968                 return 0;
5969
5970         if (interval < 0 || interval > 120)
5971                 *rc = -EINVAL;
5972         else
5973                 fan_watchdog_maxinterval = interval;
5974
5975         return 1;
5976 }
5977
5978 static int fan_write(char *buf)
5979 {
5980         char *cmd;
5981         int rc = 0;
5982
5983         while (!rc && (cmd = next_cmd(&buf))) {
5984                 if (!((fan_control_commands & TPACPI_FAN_CMD_LEVEL) &&
5985                       fan_write_cmd_level(cmd, &rc)) &&
5986                     !((fan_control_commands & TPACPI_FAN_CMD_ENABLE) &&
5987                       (fan_write_cmd_enable(cmd, &rc) ||
5988                        fan_write_cmd_disable(cmd, &rc) ||
5989                        fan_write_cmd_watchdog(cmd, &rc))) &&
5990                     !((fan_control_commands & TPACPI_FAN_CMD_SPEED) &&
5991                       fan_write_cmd_speed(cmd, &rc))
5992                     )
5993                         rc = -EINVAL;
5994                 else if (!rc)
5995                         fan_watchdog_reset();
5996         }
5997
5998         return rc;
5999 }
6000
6001 static struct ibm_struct fan_driver_data = {
6002         .name = "fan",
6003         .read = fan_read,
6004         .write = fan_write,
6005         .exit = fan_exit,
6006 };
6007
6008 /****************************************************************************
6009  ****************************************************************************
6010  *
6011  * Infrastructure
6012  *
6013  ****************************************************************************
6014  ****************************************************************************/
6015
6016 /* sysfs name ---------------------------------------------------------- */
6017 static ssize_t thinkpad_acpi_pdev_name_show(struct device *dev,
6018                            struct device_attribute *attr,
6019                            char *buf)
6020 {
6021         return snprintf(buf, PAGE_SIZE, "%s\n", TPACPI_NAME);
6022 }
6023
6024 static struct device_attribute dev_attr_thinkpad_acpi_pdev_name =
6025         __ATTR(name, S_IRUGO, thinkpad_acpi_pdev_name_show, NULL);
6026
6027 /* --------------------------------------------------------------------- */
6028
6029 /* /proc support */
6030 static struct proc_dir_entry *proc_dir;
6031
6032 /*
6033  * Module and infrastructure proble, init and exit handling
6034  */
6035
6036 static int force_load;
6037
6038 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
6039 static const char * __init str_supported(int is_supported)
6040 {
6041         static char text_unsupported[] __initdata = "not supported";
6042
6043         return (is_supported)? &text_unsupported[4] : &text_unsupported[0];
6044 }
6045 #endif /* CONFIG_THINKPAD_ACPI_DEBUG */
6046
6047 static void ibm_exit(struct ibm_struct *ibm)
6048 {
6049         dbg_printk(TPACPI_DBG_EXIT, "removing %s\n", ibm->name);
6050
6051         list_del_init(&ibm->all_drivers);
6052
6053         if (ibm->flags.acpi_notify_installed) {
6054                 dbg_printk(TPACPI_DBG_EXIT,
6055                         "%s: acpi_remove_notify_handler\n", ibm->name);
6056                 BUG_ON(!ibm->acpi);
6057                 acpi_remove_notify_handler(*ibm->acpi->handle,
6058                                            ibm->acpi->type,
6059                                            dispatch_acpi_notify);
6060                 ibm->flags.acpi_notify_installed = 0;
6061                 ibm->flags.acpi_notify_installed = 0;
6062         }
6063
6064         if (ibm->flags.proc_created) {
6065                 dbg_printk(TPACPI_DBG_EXIT,
6066                         "%s: remove_proc_entry\n", ibm->name);
6067                 remove_proc_entry(ibm->name, proc_dir);
6068                 ibm->flags.proc_created = 0;
6069         }
6070
6071         if (ibm->flags.acpi_driver_registered) {
6072                 dbg_printk(TPACPI_DBG_EXIT,
6073                         "%s: acpi_bus_unregister_driver\n", ibm->name);
6074                 BUG_ON(!ibm->acpi);
6075                 acpi_bus_unregister_driver(ibm->acpi->driver);
6076                 kfree(ibm->acpi->driver);
6077                 ibm->acpi->driver = NULL;
6078                 ibm->flags.acpi_driver_registered = 0;
6079         }
6080
6081         if (ibm->flags.init_called && ibm->exit) {
6082                 ibm->exit();
6083                 ibm->flags.init_called = 0;
6084         }
6085
6086         dbg_printk(TPACPI_DBG_INIT, "finished removing %s\n", ibm->name);
6087 }
6088
6089 static int __init ibm_init(struct ibm_init_struct *iibm)
6090 {
6091         int ret;
6092         struct ibm_struct *ibm = iibm->data;
6093         struct proc_dir_entry *entry;
6094
6095         BUG_ON(ibm == NULL);
6096
6097         INIT_LIST_HEAD(&ibm->all_drivers);
6098
6099         if (ibm->flags.experimental && !experimental)
6100                 return 0;
6101
6102         dbg_printk(TPACPI_DBG_INIT,
6103                 "probing for %s\n", ibm->name);
6104
6105         if (iibm->init) {
6106                 ret = iibm->init(iibm);
6107                 if (ret > 0)
6108                         return 0;       /* probe failed */
6109                 if (ret)
6110                         return ret;
6111
6112                 ibm->flags.init_called = 1;
6113         }
6114
6115         if (ibm->acpi) {
6116                 if (ibm->acpi->hid) {
6117                         ret = register_tpacpi_subdriver(ibm);
6118                         if (ret)
6119                                 goto err_out;
6120                 }
6121
6122                 if (ibm->acpi->notify) {
6123                         ret = setup_acpi_notify(ibm);
6124                         if (ret == -ENODEV) {
6125                                 printk(TPACPI_NOTICE "disabling subdriver %s\n",
6126                                         ibm->name);
6127                                 ret = 0;
6128                                 goto err_out;
6129                         }
6130                         if (ret < 0)
6131                                 goto err_out;
6132                 }
6133         }
6134
6135         dbg_printk(TPACPI_DBG_INIT,
6136                 "%s installed\n", ibm->name);
6137
6138         if (ibm->read) {
6139                 entry = create_proc_entry(ibm->name,
6140                                           S_IFREG | S_IRUGO | S_IWUSR,
6141                                           proc_dir);
6142                 if (!entry) {
6143                         printk(TPACPI_ERR "unable to create proc entry %s\n",
6144                                ibm->name);
6145                         ret = -ENODEV;
6146                         goto err_out;
6147                 }
6148                 entry->owner = THIS_MODULE;
6149                 entry->data = ibm;
6150                 entry->read_proc = &dispatch_procfs_read;
6151                 if (ibm->write)
6152                         entry->write_proc = &dispatch_procfs_write;
6153                 ibm->flags.proc_created = 1;
6154         }
6155
6156         list_add_tail(&ibm->all_drivers, &tpacpi_all_drivers);
6157
6158         return 0;
6159
6160 err_out:
6161         dbg_printk(TPACPI_DBG_INIT,
6162                 "%s: at error exit path with result %d\n",
6163                 ibm->name, ret);
6164
6165         ibm_exit(ibm);
6166         return (ret < 0)? ret : 0;
6167 }
6168
6169 /* Probing */
6170
6171 static void __init get_thinkpad_model_data(struct thinkpad_id_data *tp)
6172 {
6173         const struct dmi_device *dev = NULL;
6174         char ec_fw_string[18];
6175
6176         if (!tp)
6177                 return;
6178
6179         memset(tp, 0, sizeof(*tp));
6180
6181         if (dmi_name_in_vendors("IBM"))
6182                 tp->vendor = PCI_VENDOR_ID_IBM;
6183         else if (dmi_name_in_vendors("LENOVO"))
6184                 tp->vendor = PCI_VENDOR_ID_LENOVO;
6185         else
6186                 return;
6187
6188         tp->bios_version_str = kstrdup(dmi_get_system_info(DMI_BIOS_VERSION),
6189                                         GFP_KERNEL);
6190         if (!tp->bios_version_str)
6191                 return;
6192         tp->bios_model = tp->bios_version_str[0]
6193                          | (tp->bios_version_str[1] << 8);
6194
6195         /*
6196          * ThinkPad T23 or newer, A31 or newer, R50e or newer,
6197          * X32 or newer, all Z series;  Some models must have an
6198          * up-to-date BIOS or they will not be detected.
6199          *
6200          * See http://thinkwiki.org/wiki/List_of_DMI_IDs
6201          */
6202         while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) {
6203                 if (sscanf(dev->name,
6204                            "IBM ThinkPad Embedded Controller -[%17c",
6205                            ec_fw_string) == 1) {
6206                         ec_fw_string[sizeof(ec_fw_string) - 1] = 0;
6207                         ec_fw_string[strcspn(ec_fw_string, " ]")] = 0;
6208
6209                         tp->ec_version_str = kstrdup(ec_fw_string, GFP_KERNEL);
6210                         tp->ec_model = ec_fw_string[0]
6211                                         | (ec_fw_string[1] << 8);
6212                         break;
6213                 }
6214         }
6215
6216         tp->model_str = kstrdup(dmi_get_system_info(DMI_PRODUCT_VERSION),
6217                                         GFP_KERNEL);
6218         if (tp->model_str && strnicmp(tp->model_str, "ThinkPad", 8) != 0) {
6219                 kfree(tp->model_str);
6220                 tp->model_str = NULL;
6221         }
6222
6223         tp->nummodel_str = kstrdup(dmi_get_system_info(DMI_PRODUCT_NAME),
6224                                         GFP_KERNEL);
6225 }
6226
6227 static int __init probe_for_thinkpad(void)
6228 {
6229         int is_thinkpad;
6230
6231         if (acpi_disabled)
6232                 return -ENODEV;
6233
6234         /*
6235          * Non-ancient models have better DMI tagging, but very old models
6236          * don't.
6237          */
6238         is_thinkpad = (thinkpad_id.model_str != NULL);
6239
6240         /* ec is required because many other handles are relative to it */
6241         TPACPI_ACPIHANDLE_INIT(ec);
6242         if (!ec_handle) {
6243                 if (is_thinkpad)
6244                         printk(TPACPI_ERR
6245                                 "Not yet supported ThinkPad detected!\n");
6246                 return -ENODEV;
6247         }
6248
6249         /*
6250          * Risks a regression on very old machines, but reduces potential
6251          * false positives a damn great deal
6252          */
6253         if (!is_thinkpad)
6254                 is_thinkpad = (thinkpad_id.vendor == PCI_VENDOR_ID_IBM);
6255
6256         if (!is_thinkpad && !force_load)
6257                 return -ENODEV;
6258
6259         return 0;
6260 }
6261
6262
6263 /* Module init, exit, parameters */
6264
6265 static struct ibm_init_struct ibms_init[] __initdata = {
6266         {
6267                 .init = thinkpad_acpi_driver_init,
6268                 .data = &thinkpad_acpi_driver_data,
6269         },
6270         {
6271                 .init = hotkey_init,
6272                 .data = &hotkey_driver_data,
6273         },
6274         {
6275                 .init = bluetooth_init,
6276                 .data = &bluetooth_driver_data,
6277         },
6278         {
6279                 .init = wan_init,
6280                 .data = &wan_driver_data,
6281         },
6282 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
6283         {
6284                 .init = video_init,
6285                 .data = &video_driver_data,
6286         },
6287 #endif
6288         {
6289                 .init = light_init,
6290                 .data = &light_driver_data,
6291         },
6292 #ifdef CONFIG_THINKPAD_ACPI_DOCK
6293         {
6294                 .init = dock_init,
6295                 .data = &dock_driver_data[0],
6296         },
6297         {
6298                 .init = dock_init2,
6299                 .data = &dock_driver_data[1],
6300         },
6301 #endif
6302 #ifdef CONFIG_THINKPAD_ACPI_BAY
6303         {
6304                 .init = bay_init,
6305                 .data = &bay_driver_data,
6306         },
6307 #endif
6308         {
6309                 .init = cmos_init,
6310                 .data = &cmos_driver_data,
6311         },
6312         {
6313                 .init = led_init,
6314                 .data = &led_driver_data,
6315         },
6316         {
6317                 .init = beep_init,
6318                 .data = &beep_driver_data,
6319         },
6320         {
6321                 .init = thermal_init,
6322                 .data = &thermal_driver_data,
6323         },
6324         {
6325                 .data = &ecdump_driver_data,
6326         },
6327         {
6328                 .init = brightness_init,
6329                 .data = &brightness_driver_data,
6330         },
6331         {
6332                 .data = &volume_driver_data,
6333         },
6334         {
6335                 .init = fan_init,
6336                 .data = &fan_driver_data,
6337         },
6338 };
6339
6340 static int __init set_ibm_param(const char *val, struct kernel_param *kp)
6341 {
6342         unsigned int i;
6343         struct ibm_struct *ibm;
6344
6345         if (!kp || !kp->name || !val)
6346                 return -EINVAL;
6347
6348         for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
6349                 ibm = ibms_init[i].data;
6350                 WARN_ON(ibm == NULL);
6351
6352                 if (!ibm || !ibm->name)
6353                         continue;
6354
6355                 if (strcmp(ibm->name, kp->name) == 0 && ibm->write) {
6356                         if (strlen(val) > sizeof(ibms_init[i].param) - 2)
6357                                 return -ENOSPC;
6358                         strcpy(ibms_init[i].param, val);
6359                         strcat(ibms_init[i].param, ",");
6360                         return 0;
6361                 }
6362         }
6363
6364         return -EINVAL;
6365 }
6366
6367 module_param(experimental, int, 0);
6368 MODULE_PARM_DESC(experimental,
6369                  "Enables experimental features when non-zero");
6370
6371 module_param_named(debug, dbg_level, uint, 0);
6372 MODULE_PARM_DESC(debug, "Sets debug level bit-mask");
6373
6374 module_param(force_load, bool, 0);
6375 MODULE_PARM_DESC(force_load,
6376                  "Attempts to load the driver even on a "
6377                  "mis-identified ThinkPad when true");
6378
6379 module_param_named(fan_control, fan_control_allowed, bool, 0);
6380 MODULE_PARM_DESC(fan_control,
6381                  "Enables setting fan parameters features when true");
6382
6383 module_param_named(brightness_mode, brightness_mode, int, 0);
6384 MODULE_PARM_DESC(brightness_mode,
6385                  "Selects brightness control strategy: "
6386                  "0=auto, 1=EC, 2=CMOS, 3=both");
6387
6388 module_param(brightness_enable, uint, 0);
6389 MODULE_PARM_DESC(brightness_enable,
6390                  "Enables backlight control when 1, disables when 0");
6391
6392 module_param(hotkey_report_mode, uint, 0);
6393 MODULE_PARM_DESC(hotkey_report_mode,
6394                  "used for backwards compatibility with userspace, "
6395                  "see documentation");
6396
6397 #define TPACPI_PARAM(feature) \
6398         module_param_call(feature, set_ibm_param, NULL, NULL, 0); \
6399         MODULE_PARM_DESC(feature, "Simulates thinkpad-acpi procfs command " \
6400                          "at module load, see documentation")
6401
6402 TPACPI_PARAM(hotkey);
6403 TPACPI_PARAM(bluetooth);
6404 TPACPI_PARAM(video);
6405 TPACPI_PARAM(light);
6406 #ifdef CONFIG_THINKPAD_ACPI_DOCK
6407 TPACPI_PARAM(dock);
6408 #endif
6409 #ifdef CONFIG_THINKPAD_ACPI_BAY
6410 TPACPI_PARAM(bay);
6411 #endif /* CONFIG_THINKPAD_ACPI_BAY */
6412 TPACPI_PARAM(cmos);
6413 TPACPI_PARAM(led);
6414 TPACPI_PARAM(beep);
6415 TPACPI_PARAM(ecdump);
6416 TPACPI_PARAM(brightness);
6417 TPACPI_PARAM(volume);
6418 TPACPI_PARAM(fan);
6419
6420 static void thinkpad_acpi_module_exit(void)
6421 {
6422         struct ibm_struct *ibm, *itmp;
6423
6424         tpacpi_lifecycle = TPACPI_LIFE_EXITING;
6425
6426         list_for_each_entry_safe_reverse(ibm, itmp,
6427                                          &tpacpi_all_drivers,
6428                                          all_drivers) {
6429                 ibm_exit(ibm);
6430         }
6431
6432         dbg_printk(TPACPI_DBG_INIT, "finished subdriver exit path...\n");
6433
6434         if (tpacpi_inputdev) {
6435                 if (tp_features.input_device_registered)
6436                         input_unregister_device(tpacpi_inputdev);
6437                 else
6438                         input_free_device(tpacpi_inputdev);
6439         }
6440
6441         if (tpacpi_hwmon)
6442                 hwmon_device_unregister(tpacpi_hwmon);
6443
6444         if (tp_features.sensors_pdev_attrs_registered)
6445                 device_remove_file(&tpacpi_sensors_pdev->dev,
6446                                    &dev_attr_thinkpad_acpi_pdev_name);
6447         if (tpacpi_sensors_pdev)
6448                 platform_device_unregister(tpacpi_sensors_pdev);
6449         if (tpacpi_pdev)
6450                 platform_device_unregister(tpacpi_pdev);
6451
6452         if (tp_features.sensors_pdrv_attrs_registered)
6453                 tpacpi_remove_driver_attributes(&tpacpi_hwmon_pdriver.driver);
6454         if (tp_features.platform_drv_attrs_registered)
6455                 tpacpi_remove_driver_attributes(&tpacpi_pdriver.driver);
6456
6457         if (tp_features.sensors_pdrv_registered)
6458                 platform_driver_unregister(&tpacpi_hwmon_pdriver);
6459
6460         if (tp_features.platform_drv_registered)
6461                 platform_driver_unregister(&tpacpi_pdriver);
6462
6463         if (proc_dir)
6464                 remove_proc_entry(TPACPI_PROC_DIR, acpi_root_dir);
6465
6466         if (tpacpi_wq)
6467                 destroy_workqueue(tpacpi_wq);
6468
6469         kfree(thinkpad_id.bios_version_str);
6470         kfree(thinkpad_id.ec_version_str);
6471         kfree(thinkpad_id.model_str);
6472 }
6473
6474
6475 static int __init thinkpad_acpi_module_init(void)
6476 {
6477         int ret, i;
6478
6479         tpacpi_lifecycle = TPACPI_LIFE_INIT;
6480
6481         /* Parameter checking */
6482         if (hotkey_report_mode > 2)
6483                 return -EINVAL;
6484
6485         /* Driver-level probe */
6486
6487         get_thinkpad_model_data(&thinkpad_id);
6488         ret = probe_for_thinkpad();
6489         if (ret) {
6490                 thinkpad_acpi_module_exit();
6491                 return ret;
6492         }
6493
6494         /* Driver initialization */
6495
6496         TPACPI_ACPIHANDLE_INIT(ecrd);
6497         TPACPI_ACPIHANDLE_INIT(ecwr);
6498
6499         tpacpi_wq = create_singlethread_workqueue(TPACPI_WORKQUEUE_NAME);
6500         if (!tpacpi_wq) {
6501                 thinkpad_acpi_module_exit();
6502                 return -ENOMEM;
6503         }
6504
6505         proc_dir = proc_mkdir(TPACPI_PROC_DIR, acpi_root_dir);
6506         if (!proc_dir) {
6507                 printk(TPACPI_ERR
6508                        "unable to create proc dir " TPACPI_PROC_DIR);
6509                 thinkpad_acpi_module_exit();
6510                 return -ENODEV;
6511         }
6512         proc_dir->owner = THIS_MODULE;
6513
6514         ret = platform_driver_register(&tpacpi_pdriver);
6515         if (ret) {
6516                 printk(TPACPI_ERR
6517                        "unable to register main platform driver\n");
6518                 thinkpad_acpi_module_exit();
6519                 return ret;
6520         }
6521         tp_features.platform_drv_registered = 1;
6522
6523         ret = platform_driver_register(&tpacpi_hwmon_pdriver);
6524         if (ret) {
6525                 printk(TPACPI_ERR
6526                        "unable to register hwmon platform driver\n");
6527                 thinkpad_acpi_module_exit();
6528                 return ret;
6529         }
6530         tp_features.sensors_pdrv_registered = 1;
6531
6532         ret = tpacpi_create_driver_attributes(&tpacpi_pdriver.driver);
6533         if (!ret) {
6534                 tp_features.platform_drv_attrs_registered = 1;
6535                 ret = tpacpi_create_driver_attributes(
6536                                         &tpacpi_hwmon_pdriver.driver);
6537         }
6538         if (ret) {
6539                 printk(TPACPI_ERR
6540                        "unable to create sysfs driver attributes\n");
6541                 thinkpad_acpi_module_exit();
6542                 return ret;
6543         }
6544         tp_features.sensors_pdrv_attrs_registered = 1;
6545
6546
6547         /* Device initialization */
6548         tpacpi_pdev = platform_device_register_simple(TPACPI_DRVR_NAME, -1,
6549                                                         NULL, 0);
6550         if (IS_ERR(tpacpi_pdev)) {
6551                 ret = PTR_ERR(tpacpi_pdev);
6552                 tpacpi_pdev = NULL;
6553                 printk(TPACPI_ERR "unable to register platform device\n");
6554                 thinkpad_acpi_module_exit();
6555                 return ret;
6556         }
6557         tpacpi_sensors_pdev = platform_device_register_simple(
6558                                                 TPACPI_HWMON_DRVR_NAME,
6559                                                 -1, NULL, 0);
6560         if (IS_ERR(tpacpi_sensors_pdev)) {
6561                 ret = PTR_ERR(tpacpi_sensors_pdev);
6562                 tpacpi_sensors_pdev = NULL;
6563                 printk(TPACPI_ERR
6564                        "unable to register hwmon platform device\n");
6565                 thinkpad_acpi_module_exit();
6566                 return ret;
6567         }
6568         ret = device_create_file(&tpacpi_sensors_pdev->dev,
6569                                  &dev_attr_thinkpad_acpi_pdev_name);
6570         if (ret) {
6571                 printk(TPACPI_ERR
6572                        "unable to create sysfs hwmon device attributes\n");
6573                 thinkpad_acpi_module_exit();
6574                 return ret;
6575         }
6576         tp_features.sensors_pdev_attrs_registered = 1;
6577         tpacpi_hwmon = hwmon_device_register(&tpacpi_sensors_pdev->dev);
6578         if (IS_ERR(tpacpi_hwmon)) {
6579                 ret = PTR_ERR(tpacpi_hwmon);
6580                 tpacpi_hwmon = NULL;
6581                 printk(TPACPI_ERR "unable to register hwmon device\n");
6582                 thinkpad_acpi_module_exit();
6583                 return ret;
6584         }
6585         mutex_init(&tpacpi_inputdev_send_mutex);
6586         tpacpi_inputdev = input_allocate_device();
6587         if (!tpacpi_inputdev) {
6588                 printk(TPACPI_ERR "unable to allocate input device\n");
6589                 thinkpad_acpi_module_exit();
6590                 return -ENOMEM;
6591         } else {
6592                 /* Prepare input device, but don't register */
6593                 tpacpi_inputdev->name = "ThinkPad Extra Buttons";
6594                 tpacpi_inputdev->phys = TPACPI_DRVR_NAME "/input0";
6595                 tpacpi_inputdev->id.bustype = BUS_HOST;
6596                 tpacpi_inputdev->id.vendor = (thinkpad_id.vendor) ?
6597                                                 thinkpad_id.vendor :
6598                                                 PCI_VENDOR_ID_IBM;
6599                 tpacpi_inputdev->id.product = TPACPI_HKEY_INPUT_PRODUCT;
6600                 tpacpi_inputdev->id.version = TPACPI_HKEY_INPUT_VERSION;
6601         }
6602         for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
6603                 ret = ibm_init(&ibms_init[i]);
6604                 if (ret >= 0 && *ibms_init[i].param)
6605                         ret = ibms_init[i].data->write(ibms_init[i].param);
6606                 if (ret < 0) {
6607                         thinkpad_acpi_module_exit();
6608                         return ret;
6609                 }
6610         }
6611         ret = input_register_device(tpacpi_inputdev);
6612         if (ret < 0) {
6613                 printk(TPACPI_ERR "unable to register input device\n");
6614                 thinkpad_acpi_module_exit();
6615                 return ret;
6616         } else {
6617                 tp_features.input_device_registered = 1;
6618         }
6619
6620         tpacpi_lifecycle = TPACPI_LIFE_RUNNING;
6621         return 0;
6622 }
6623
6624 /* Please remove this in year 2009 */
6625 MODULE_ALIAS("ibm_acpi");
6626
6627 MODULE_ALIAS(TPACPI_DRVR_SHORTNAME);
6628
6629 /*
6630  * DMI matching for module autoloading
6631  *
6632  * See http://thinkwiki.org/wiki/List_of_DMI_IDs
6633  * See http://thinkwiki.org/wiki/BIOS_Upgrade_Downloads
6634  *
6635  * Only models listed in thinkwiki will be supported, so add yours
6636  * if it is not there yet.
6637  */
6638 #define IBM_BIOS_MODULE_ALIAS(__type) \
6639         MODULE_ALIAS("dmi:bvnIBM:bvr" __type "ET??WW")
6640
6641 /* Non-ancient thinkpads */
6642 MODULE_ALIAS("dmi:bvnIBM:*:svnIBM:*:pvrThinkPad*:rvnIBM:*");
6643 MODULE_ALIAS("dmi:bvnLENOVO:*:svnLENOVO:*:pvrThinkPad*:rvnLENOVO:*");
6644
6645 /* Ancient thinkpad BIOSes have to be identified by
6646  * BIOS type or model number, and there are far less
6647  * BIOS types than model numbers... */
6648 IBM_BIOS_MODULE_ALIAS("I[B,D,H,I,M,N,O,T,W,V,Y,Z]");
6649 IBM_BIOS_MODULE_ALIAS("1[0,3,6,8,A-G,I,K,M-P,S,T]");
6650 IBM_BIOS_MODULE_ALIAS("K[U,X-Z]");
6651
6652 MODULE_AUTHOR("Borislav Deianov, Henrique de Moraes Holschuh");
6653 MODULE_DESCRIPTION(TPACPI_DESC);
6654 MODULE_VERSION(TPACPI_VERSION);
6655 MODULE_LICENSE("GPL");
6656
6657 module_init(thinkpad_acpi_module_init);
6658 module_exit(thinkpad_acpi_module_exit);