drivers/misc/thinkpad_acpi.h

   1 /*
   2  *  thinkpad_acpi.h - ThinkPad ACPI Extras
   3  *
   4  *
   5  *  Copyright (C) 2004-2005 Borislav Deianov <borislav@users.sf.net>
   6  *  Copyright (C) 2006-2007 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 #ifndef __THINKPAD_ACPI_H__
  25 #define __THINKPAD_ACPI_H__
  26
  27 #include <linux/kernel.h>
  28 #include <linux/module.h>
  29 #include <linux/init.h>
  30 #include <linux/types.h>
  31 #include <linux/string.h>
  32 #include <linux/list.h>
  33
  34 #include <linux/proc_fs.h>
  35 #include <linux/backlight.h>
  36 #include <linux/fb.h>
  37 #include <asm/uaccess.h>
  38
  39 #include <linux/dmi.h>
  40 #include <linux/jiffies.h>
  41 #include <linux/workqueue.h>
  42
  43 #include <acpi/acpi_drivers.h>
  44 #include <acpi/acnamesp.h>
  45
  46
  47 /****************************************************************************
  48  * Main driver
  49  */
  50
  51 #define IBM_NAME "thinkpad"
  52 #define IBM_DESC "ThinkPad ACPI Extras"
  53 #define IBM_FILE "thinkpad_acpi"
  54 #define IBM_URL "http://ibm-acpi.sf.net/"
  55 #define IBM_MAIL "ibm-acpi-devel@lists.sourceforge.net"
  56
  57 #define IBM_PROC_DIR "ibm"
  58 #define IBM_ACPI_EVENT_PREFIX "ibm"
  59
  60 #define IBM_LOG IBM_FILE ": "
  61 #define IBM_ERR    KERN_ERR    IBM_LOG
  62 #define IBM_NOTICE KERN_NOTICE IBM_LOG
  63 #define IBM_INFO   KERN_INFO   IBM_LOG
  64 #define IBM_DEBUG  KERN_DEBUG  IBM_LOG
  65
  66 #define IBM_MAX_ACPI_ARGS 3
  67
  68 /* ThinkPad CMOS commands */
  69 #define TP_CMOS_VOLUME_DOWN     0
  70 #define TP_CMOS_VOLUME_UP       1
  71 #define TP_CMOS_VOLUME_MUTE     2
  72 #define TP_CMOS_BRIGHTNESS_UP   4
  73 #define TP_CMOS_BRIGHTNESS_DOWN 5
  74
  75 #define onoff(status,bit) ((status) & (1 << (bit)) ? "on" : "off")
  76 #define enabled(status,bit) ((status) & (1 << (bit)) ? "enabled" : "disabled")
  77 #define strlencmp(a,b) (strncmp((a), (b), strlen(b)))
  78
  79 /* Debugging */
  80 #define TPACPI_DBG_ALL          0xffff
  81 #define TPACPI_DBG_ALL          0xffff
  82 #define TPACPI_DBG_INIT         0x0001
  83 #define TPACPI_DBG_EXIT         0x0002
  84 #define dbg_printk(a_dbg_level, format, arg...) \
  85         do { if (dbg_level & a_dbg_level) \
  86                 printk(IBM_DEBUG "%s: " format, __func__ , ## arg); } while (0)
  87 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
  88 #define vdbg_printk(a_dbg_level, format, arg...) \
  89         dbg_printk(a_dbg_level, format, ## arg)
  90 static const char *str_supported(int is_supported);
  91 #else
  92 #define vdbg_printk(a_dbg_level, format, arg...)
  93 #endif
  94
  95 /* ACPI HIDs */
  96 #define IBM_HKEY_HID    "IBM0068"
  97 #define IBM_PCI_HID     "PNP0A03"
  98
  99 /* ACPI helpers */
 100 static int __must_check acpi_evalf(acpi_handle handle,
 101                       void *res, char *method, char *fmt, ...);
 102 static int __must_check acpi_ec_read(int i, u8 * p);
 103 static int __must_check acpi_ec_write(int i, u8 v);
 104 static int __must_check _sta(acpi_handle handle);
 105
 106 /* ACPI handles */
 107 static acpi_handle root_handle;                 /* root namespace */
 108 static acpi_handle ec_handle;                   /* EC */
 109 static acpi_handle ecrd_handle, ecwr_handle;    /* 570 EC access */
 110 static acpi_handle cmos_handle, hkey_handle;    /* basic thinkpad handles */
 111
 112 static void drv_acpi_handle_init(char *name,
 113                    acpi_handle *handle, acpi_handle parent,
 114                    char **paths, int num_paths, char **path);
 115 #define IBM_ACPIHANDLE_INIT(object)                                             \
 116         drv_acpi_handle_init(#object, &object##_handle, *object##_parent,       \
 117                 object##_paths, ARRAY_SIZE(object##_paths), &object##_path)
 118
 119 /* procfs support */
 120 static struct proc_dir_entry *proc_dir;
 121
 122 /* procfs helpers */
 123 static int dispatch_procfs_read(char *page, char **start, off_t off,
 124                 int count, int *eof, void *data);
 125 static int dispatch_procfs_write(struct file *file,
 126                 const char __user * userbuf,
 127                 unsigned long count, void *data);
 128 static char *next_cmd(char **cmds);
 129
 130 /* Module */
 131 static int experimental;
 132 static u32 dbg_level;
 133 static int force_load;
 134 static char *ibm_thinkpad_ec_found;
 135
 136 static char* check_dmi_for_ec(void);
 137 static int thinkpad_acpi_module_init(void);
 138 static void thinkpad_acpi_module_exit(void);
 139
 140
 141 /****************************************************************************
 142  * Subdrivers
 143  */
 144
 145 struct ibm_struct;
 146
 147 struct tp_acpi_drv_struct {
 148         char *hid;
 149         struct acpi_driver *driver;
 150
 151         void (*notify) (struct ibm_struct *, u32);
 152         acpi_handle *handle;
 153         u32 type;
 154         struct acpi_device *device;
 155 };
 156
 157 struct ibm_struct {
 158         char *name;
 159
 160         int (*read) (char *);
 161         int (*write) (char *);
 162         void (*exit) (void);
 163
 164         struct list_head all_drivers;
 165
 166         struct tp_acpi_drv_struct *acpi;
 167
 168         struct {
 169                 u8 acpi_driver_registered:1;
 170                 u8 acpi_notify_installed:1;
 171                 u8 proc_created:1;
 172                 u8 init_called:1;
 173                 u8 experimental:1;
 174         } flags;
 175 };
 176
 177 struct ibm_init_struct {
 178         char param[32];
 179
 180         int (*init) (struct ibm_init_struct *);
 181         struct ibm_struct *data;
 182 };
 183
 184 static struct {
 185 #ifdef CONFIG_THINKPAD_ACPI_BAY
 186         u16 bay_status:1;
 187         u16 bay_eject:1;
 188         u16 bay_status2:1;
 189         u16 bay_eject2:1;
 190 #endif
 191         u16 bluetooth:1;
 192         u16 hotkey:1;
 193         u16 hotkey_mask:1;
 194         u16 light:1;
 195         u16 light_status:1;
 196         u16 wan:1;
 197         u16 fan_ctrl_status_undef:1;
 198 } tp_features;
 199
 200 static struct list_head tpacpi_all_drivers;
 201
 202 static struct ibm_init_struct ibms_init[];
 203 static int set_ibm_param(const char *val, struct kernel_param *kp);
 204 static int ibm_init(struct ibm_init_struct *iibm);
 205 static void ibm_exit(struct ibm_struct *ibm);
 206
 207
 208 /*
 209  * procfs master subdriver
 210  */
 211 static int thinkpad_acpi_driver_init(struct ibm_init_struct *iibm);
 212 static int thinkpad_acpi_driver_read(char *p);
 213
 214
 215 /*
 216  * Bay subdriver
 217  */
 218
 219 #ifdef CONFIG_THINKPAD_ACPI_BAY
 220 static acpi_handle bay_handle, bay_ej_handle;
 221 static acpi_handle bay2_handle, bay2_ej_handle;
 222
 223 static int bay_init(struct ibm_init_struct *iibm);
 224 static void bay_notify(struct ibm_struct *ibm, u32 event);
 225 static int bay_read(char *p);
 226 static int bay_write(char *buf);
 227 #endif /* CONFIG_THINKPAD_ACPI_BAY */
 228
 229
 230 /*
 231  * Beep subdriver
 232  */
 233
 234 static acpi_handle beep_handle;
 235
 236 static int beep_read(char *p);
 237 static int beep_write(char *buf);
 238
 239
 240 /*
 241  * Bluetooth subdriver
 242  */
 243
 244 static int bluetooth_init(struct ibm_init_struct *iibm);
 245 static int bluetooth_status(void);
 246 static int bluetooth_read(char *p);
 247 static int bluetooth_write(char *buf);
 248
 249
 250 /*
 251  * Brightness (backlight) subdriver
 252  */
 253
 254 static struct backlight_device *ibm_backlight_device;
 255 static int brightness_offset = 0x31;
 256
 257 static int brightness_init(struct ibm_init_struct *iibm);
 258 static void brightness_exit(void);
 259 static int brightness_get(struct backlight_device *bd);
 260 static int brightness_set(int value);
 261 static int brightness_update_status(struct backlight_device *bd);
 262 static int brightness_read(char *p);
 263 static int brightness_write(char *buf);
 264
 265
 266 /*
 267  * CMOS subdriver
 268  */
 269
 270 static int cmos_eval(int cmos_cmd);
 271 static int cmos_read(char *p);
 272 static int cmos_write(char *buf);
 273
 274
 275 /*
 276  * Dock subdriver
 277  */
 278
 279 #ifdef CONFIG_THINKPAD_ACPI_DOCK
 280 static acpi_handle pci_handle;
 281 static acpi_handle dock_handle;
 282
 283 static void dock_notify(struct ibm_struct *ibm, u32 event);
 284 static int dock_read(char *p);
 285 static int dock_write(char *buf);
 286 #endif /* CONFIG_THINKPAD_ACPI_DOCK */
 287
 288
 289 /*
 290  * EC dump subdriver
 291  */
 292
 293 static int ecdump_read(char *p) ;
 294 static int ecdump_write(char *buf);
 295
 296
 297 /*
 298  * Fan subdriver
 299  */
 300
 301 enum {                                  /* Fan control constants */
 302         fan_status_offset = 0x2f,       /* EC register 0x2f */
 303         fan_rpm_offset = 0x84,          /* EC register 0x84: LSB, 0x85 MSB (RPM)
 304                                          * 0x84 must be read before 0x85 */
 305
 306         TP_EC_FAN_FULLSPEED = 0x40,     /* EC fan mode: full speed */
 307         TP_EC_FAN_AUTO      = 0x80,     /* EC fan mode: auto fan control */
 308 };
 309
 310 enum fan_status_access_mode {
 311         TPACPI_FAN_NONE = 0,            /* No fan status or control */
 312         TPACPI_FAN_RD_ACPI_GFAN,        /* Use ACPI GFAN */
 313         TPACPI_FAN_RD_TPEC,             /* Use ACPI EC regs 0x2f, 0x84-0x85 */
 314 };
 315
 316 enum fan_control_access_mode {
 317         TPACPI_FAN_WR_NONE = 0,         /* No fan control */
 318         TPACPI_FAN_WR_ACPI_SFAN,        /* Use ACPI SFAN */
 319         TPACPI_FAN_WR_TPEC,             /* Use ACPI EC reg 0x2f */
 320         TPACPI_FAN_WR_ACPI_FANS,        /* Use ACPI FANS and EC reg 0x2f */
 321 };
 322
 323 enum fan_control_commands {
 324         TPACPI_FAN_CMD_SPEED    = 0x0001,       /* speed command */
 325         TPACPI_FAN_CMD_LEVEL    = 0x0002,       /* level command  */
 326         TPACPI_FAN_CMD_ENABLE   = 0x0004,       /* enable/disable cmd,
 327                                                  * and also watchdog cmd */
 328 };
 329
 330 static enum fan_status_access_mode fan_status_access_mode;
 331 static enum fan_control_access_mode fan_control_access_mode;
 332 static enum fan_control_commands fan_control_commands;
 333 static u8 fan_control_initial_status;
 334 static int fan_watchdog_maxinterval;
 335
 336 static acpi_handle fans_handle, gfan_handle, sfan_handle;
 337
 338 static int fan_init(struct ibm_init_struct *iibm);
 339 static void fan_exit(void);
 340 static int fan_get_status(u8 *status);
 341 static int fan_get_speed(unsigned int *speed);
 342 static void fan_watchdog_fire(struct work_struct *ignored);
 343 static void fan_watchdog_reset(void);
 344 static int fan_set_level(int level);
 345 static int fan_set_enable(void);
 346 static int fan_set_disable(void);
 347 static int fan_set_speed(int speed);
 348 static int fan_read(char *p);
 349 static int fan_write(char *buf);
 350 static int fan_write_cmd_level(const char *cmd, int *rc);
 351 static int fan_write_cmd_enable(const char *cmd, int *rc);
 352 static int fan_write_cmd_disable(const char *cmd, int *rc);
 353 static int fan_write_cmd_speed(const char *cmd, int *rc);
 354 static int fan_write_cmd_watchdog(const char *cmd, int *rc);
 355
 356
 357 /*
 358  * Hotkey subdriver
 359  */
 360
 361 static int hotkey_orig_status;
 362 static int hotkey_orig_mask;
 363
 364 static int hotkey_init(struct ibm_init_struct *iibm);
 365 static void hotkey_exit(void);
 366 static int hotkey_get(int *status, int *mask);
 367 static int hotkey_set(int status, int mask);
 368 static void hotkey_notify(struct ibm_struct *ibm, u32 event);
 369 static int hotkey_read(char *p);
 370 static int hotkey_write(char *buf);
 371
 372
 373 /*
 374  * LED subdriver
 375  */
 376
 377 enum led_access_mode {
 378         TPACPI_LED_NONE = 0,
 379         TPACPI_LED_570, /* 570 */
 380         TPACPI_LED_OLD, /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
 381         TPACPI_LED_NEW, /* all others */
 382 };
 383
 384 enum {  /* For TPACPI_LED_OLD */
 385         TPACPI_LED_EC_HLCL = 0x0c,      /* EC reg to get led to power on */
 386         TPACPI_LED_EC_HLBL = 0x0d,      /* EC reg to blink a lit led */
 387         TPACPI_LED_EC_HLMS = 0x0e,      /* EC reg to select led to command */
 388 };
 389
 390 static enum led_access_mode led_supported;
 391 static acpi_handle led_handle;
 392
 393 static int led_init(struct ibm_init_struct *iibm);
 394 static int led_read(char *p);
 395 static int led_write(char *buf);
 396
 397 /*
 398  * Light (thinklight) subdriver
 399  */
 400
 401 static acpi_handle lght_handle, ledb_handle;
 402
 403 static int light_init(struct ibm_init_struct *iibm);
 404 static int light_read(char *p);
 405 static int light_write(char *buf);
 406
 407
 408 /*
 409  * Thermal subdriver
 410  */
 411
 412 enum thermal_access_mode {
 413         TPACPI_THERMAL_NONE = 0,        /* No thermal support */
 414         TPACPI_THERMAL_ACPI_TMP07,      /* Use ACPI TMP0-7 */
 415         TPACPI_THERMAL_ACPI_UPDT,       /* Use ACPI TMP0-7 with UPDT */
 416         TPACPI_THERMAL_TPEC_8,          /* Use ACPI EC regs, 8 sensors */
 417         TPACPI_THERMAL_TPEC_16,         /* Use ACPI EC regs, 16 sensors */
 418 };
 419
 420 #define TPACPI_MAX_THERMAL_SENSORS 16   /* Max thermal sensors supported */
 421 struct ibm_thermal_sensors_struct {
 422         s32 temp[TPACPI_MAX_THERMAL_SENSORS];
 423 };
 424
 425 static int thermal_init(struct ibm_init_struct *iibm);
 426 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s);
 427 static int thermal_read(char *p);
 428
 429
 430 /*
 431  * Video subdriver
 432  */
 433
 434 enum video_access_mode {
 435         TPACPI_VIDEO_NONE = 0,
 436         TPACPI_VIDEO_570,       /* 570 */
 437         TPACPI_VIDEO_770,       /* 600e/x, 770e, 770x */
 438         TPACPI_VIDEO_NEW,       /* all others */
 439 };
 440
 441 static enum video_access_mode video_supported;
 442 static int video_orig_autosw;
 443 static acpi_handle vid_handle, vid2_handle;
 444
 445 static int video_init(struct ibm_init_struct *iibm);
 446 static void video_exit(void);
 447 static int video_status(void);
 448 static int video_autosw(void);
 449 static int video_switch(void);
 450 static int video_switch2(int status);
 451 static int video_expand(void);
 452 static int video_read(char *p);
 453 static int video_write(char *buf);
 454
 455
 456 /*
 457  * Volume subdriver
 458  */
 459
 460 static int volume_offset = 0x30;
 461
 462 static int volume_read(char *p);
 463 static int volume_write(char *buf);
 464
 465
 466 /*
 467  * Wan subdriver
 468  */
 469
 470 static int wan_init(struct ibm_init_struct *iibm);
 471 static int wan_status(void);
 472 static int wan_read(char *p);
 473 static int wan_write(char *buf);
 474
 475
 476 #endif /* __THINKPAD_ACPI_H */