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
  33 #include <linux/proc_fs.h>
  34 #include <linux/backlight.h>
  35 #include <linux/fb.h>
  36 #include <asm/uaccess.h>
  37
  38 #include <linux/dmi.h>
  39 #include <linux/jiffies.h>
  40 #include <linux/workqueue.h>
  41
  42 #include <acpi/acpi_drivers.h>
  43 #include <acpi/acnamesp.h>
  44
  45
  46 /****************************************************************************
  47  * Main driver
  48  */
  49
  50 #define IBM_NAME "thinkpad"
  51 #define IBM_DESC "ThinkPad ACPI Extras"
  52 #define IBM_FILE "thinkpad_acpi"
  53 #define IBM_URL "http://ibm-acpi.sf.net/"
  54
  55 #define IBM_DIR "ibm"
  56 #define IBM_ACPI_EVENT_PREFIX "ibm"
  57
  58 #define IBM_LOG IBM_FILE ": "
  59 #define IBM_ERR    KERN_ERR    IBM_LOG
  60 #define IBM_NOTICE KERN_NOTICE IBM_LOG
  61 #define IBM_INFO   KERN_INFO   IBM_LOG
  62 #define IBM_DEBUG  KERN_DEBUG  IBM_LOG
  63
  64 #define IBM_MAX_ACPI_ARGS 3
  65
  66 /* ThinkPad CMOS commands */
  67 #define TP_CMOS_VOLUME_DOWN     0
  68 #define TP_CMOS_VOLUME_UP       1
  69 #define TP_CMOS_VOLUME_MUTE     2
  70 #define TP_CMOS_BRIGHTNESS_UP   4
  71 #define TP_CMOS_BRIGHTNESS_DOWN 5
  72
  73 #define onoff(status,bit) ((status) & (1 << (bit)) ? "on" : "off")
  74 #define enabled(status,bit) ((status) & (1 << (bit)) ? "enabled" : "disabled")
  75 #define strlencmp(a,b) (strncmp((a), (b), strlen(b)))
  76
  77 /* Debugging */
  78 #define TPACPI_DBG_ALL          0xffff
  79 #define dbg_printk(a_dbg_level, format, arg...) \
  80         do { if (dbg_level & a_dbg_level) \
  81                 printk(IBM_DEBUG "%s: " format, __func__ , ## arg); } while (0)
  82 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
  83 #define vdbg_printk(a_dbg_level, format, arg...) \
  84         dbg_printk(a_dbg_level, format, ## arg)
  85 #else
  86 #define vdbg_printk(a_dbg_level, format, arg...)
  87 #endif
  88
  89 /* ACPI HIDs */
  90 #define IBM_HKEY_HID    "IBM0068"
  91 #define IBM_PCI_HID     "PNP0A03"
  92
  93 /* ACPI helpers */
  94 static int acpi_evalf(acpi_handle handle,
  95                       void *res, char *method, char *fmt, ...);
  96 static int acpi_ec_read(int i, u8 * p);
  97 static int acpi_ec_write(int i, u8 v);
  98 static int _sta(acpi_handle handle);
  99
 100 /* ACPI handles */
 101 static acpi_handle root_handle;                 /* root namespace */
 102 static acpi_handle ec_handle;                   /* EC */
 103 static acpi_handle ecrd_handle, ecwr_handle;    /* 570 EC access */
 104 static acpi_handle cmos_handle, hkey_handle;    /* basic thinkpad handles */
 105
 106 static void ibm_handle_init(char *name,
 107                    acpi_handle *handle, acpi_handle parent,
 108                    char **paths, int num_paths, char **path);
 109 #define IBM_HANDLE_INIT(object)                                         \
 110         ibm_handle_init(#object, &object##_handle, *object##_parent,    \
 111                 object##_paths, ARRAY_SIZE(object##_paths), &object##_path)
 112
 113 /* procfs support */
 114 static struct proc_dir_entry *proc_dir;
 115 static int thinkpad_acpi_driver_init(void);
 116 static int thinkpad_acpi_driver_read(char *p);
 117
 118 /* procfs helpers */
 119 static int dispatch_read(char *page, char **start, off_t off, int count,
 120                 int *eof, void *data);
 121 static int dispatch_write(struct file *file, const char __user * userbuf,
 122                 unsigned long count, void *data);
 123 static char *next_cmd(char **cmds);
 124
 125 /* Module */
 126 static int experimental;
 127 static u32 dbg_level;
 128 static char *ibm_thinkpad_ec_found;
 129
 130 static char* check_dmi_for_ec(void);
 131 static int thinkpad_acpi_module_init(void);
 132 static void thinkpad_acpi_module_exit(void);
 133
 134
 135 /****************************************************************************
 136  * Subdrivers
 137  */
 138
 139 struct ibm_struct {
 140         char *name;
 141         char param[32];
 142
 143         char *hid;
 144         struct acpi_driver *driver;
 145
 146         int (*init) (void);
 147         int (*read) (char *);
 148         int (*write) (char *);
 149         void (*exit) (void);
 150
 151         void (*notify) (struct ibm_struct *, u32);
 152         acpi_handle *handle;
 153         int type;
 154         struct acpi_device *device;
 155
 156         int driver_registered;
 157         int proc_created;
 158         int init_called;
 159         int notify_installed;
 160
 161         int experimental;
 162 };
 163
 164 static struct ibm_struct ibms[];
 165 static int set_ibm_param(const char *val, struct kernel_param *kp);
 166 static int ibm_init(struct ibm_struct *ibm);
 167 static void ibm_exit(struct ibm_struct *ibm);
 168
 169 /* ACPI devices */
 170 static void dispatch_notify(acpi_handle handle, u32 event, void *data);
 171 static int setup_notify(struct ibm_struct *ibm);
 172 static int ibm_device_add(struct acpi_device *device);
 173 static int register_tpacpi_subdriver(struct ibm_struct *ibm);
 174
 175
 176 /*
 177  * Bay subdriver
 178  */
 179
 180 #ifdef CONFIG_THINKPAD_ACPI_BAY
 181 static int bay_status_supported, bay_eject_supported;
 182 static int bay_status2_supported, bay_eject2_supported;
 183
 184 static acpi_handle bay_handle, bay_ej_handle;
 185 static acpi_handle bay2_handle, bay2_ej_handle;
 186
 187 static int bay_init(void);
 188 static void bay_notify(struct ibm_struct *ibm, u32 event);
 189 static int bay_read(char *p);
 190 static int bay_write(char *buf);
 191 #endif /* CONFIG_THINKPAD_ACPI_BAY */
 192
 193
 194 /*
 195  * Beep subdriver
 196  */
 197
 198 static acpi_handle beep_handle;
 199
 200 static int beep_read(char *p);
 201 static int beep_write(char *buf);
 202
 203
 204 /*
 205  * Bluetooth subdriver
 206  */
 207
 208 static int bluetooth_supported;
 209
 210 static int bluetooth_init(void);
 211 static int bluetooth_status(void);
 212 static int bluetooth_read(char *p);
 213 static int bluetooth_write(char *buf);
 214
 215
 216 /*
 217  * Brightness (backlight) subdriver
 218  */
 219
 220 static struct backlight_device *ibm_backlight_device;
 221 static int brightness_offset = 0x31;
 222
 223 static int brightness_init(void);
 224 static void brightness_exit(void);
 225 static int brightness_get(struct backlight_device *bd);
 226 static int brightness_set(int value);
 227 static int brightness_update_status(struct backlight_device *bd);
 228 static int brightness_read(char *p);
 229 static int brightness_write(char *buf);
 230
 231
 232 /*
 233  * CMOS subdriver
 234  */
 235
 236 static int cmos_eval(int cmos_cmd);
 237 static int cmos_read(char *p);
 238 static int cmos_write(char *buf);
 239
 240
 241 /*
 242  * Dock subdriver
 243  */
 244
 245 #ifdef CONFIG_THINKPAD_ACPI_DOCK
 246 static acpi_handle pci_handle;
 247 static acpi_handle dock_handle;
 248
 249 static void dock_notify(struct ibm_struct *ibm, u32 event);
 250 static int dock_read(char *p);
 251 static int dock_write(char *buf);
 252 #endif /* CONFIG_THINKPAD_ACPI_DOCK */
 253
 254
 255 /*
 256  * EC dump subdriver
 257  */
 258
 259 static int ecdump_read(char *p) ;
 260 static int ecdump_write(char *buf);
 261
 262
 263 /*
 264  * Fan subdriver
 265  */
 266
 267 enum {                                  /* Fan control constants */
 268         fan_status_offset = 0x2f,       /* EC register 0x2f */
 269         fan_rpm_offset = 0x84,          /* EC register 0x84: LSB, 0x85 MSB (RPM)
 270                                          * 0x84 must be read before 0x85 */
 271
 272         TP_EC_FAN_FULLSPEED = 0x40,     /* EC fan mode: full speed */
 273         TP_EC_FAN_AUTO      = 0x80,     /* EC fan mode: auto fan control */
 274 };
 275
 276 enum fan_status_access_mode {
 277         TPACPI_FAN_NONE = 0,            /* No fan status or control */
 278         TPACPI_FAN_RD_ACPI_GFAN,        /* Use ACPI GFAN */
 279         TPACPI_FAN_RD_TPEC,             /* Use ACPI EC regs 0x2f, 0x84-0x85 */
 280 };
 281
 282 enum fan_control_access_mode {
 283         TPACPI_FAN_WR_NONE = 0,         /* No fan control */
 284         TPACPI_FAN_WR_ACPI_SFAN,        /* Use ACPI SFAN */
 285         TPACPI_FAN_WR_TPEC,             /* Use ACPI EC reg 0x2f */
 286         TPACPI_FAN_WR_ACPI_FANS,        /* Use ACPI FANS and EC reg 0x2f */
 287 };
 288
 289 enum fan_control_commands {
 290         TPACPI_FAN_CMD_SPEED    = 0x0001,       /* speed command */
 291         TPACPI_FAN_CMD_LEVEL    = 0x0002,       /* level command  */
 292         TPACPI_FAN_CMD_ENABLE   = 0x0004,       /* enable/disable cmd,
 293                                                  * and also watchdog cmd */
 294 };
 295
 296 static enum fan_status_access_mode fan_status_access_mode;
 297 static enum fan_control_access_mode fan_control_access_mode;
 298 static enum fan_control_commands fan_control_commands;
 299 static int fan_control_status_known;
 300 static u8 fan_control_initial_status;
 301 static int fan_watchdog_maxinterval;
 302
 303 static acpi_handle fans_handle, gfan_handle, sfan_handle;
 304
 305 static int fan_init(void);
 306 static void fan_exit(void);
 307 static int fan_get_status(u8 *status);
 308 static int fan_get_speed(unsigned int *speed);
 309 static void fan_watchdog_fire(struct work_struct *ignored);
 310 static void fan_watchdog_reset(void);
 311 static int fan_set_level(int level);
 312 static int fan_set_enable(void);
 313 static int fan_set_disable(void);
 314 static int fan_set_speed(int speed);
 315 static int fan_read(char *p);
 316 static int fan_write(char *buf);
 317 static int fan_write_cmd_level(const char *cmd, int *rc);
 318 static int fan_write_cmd_enable(const char *cmd, int *rc);
 319 static int fan_write_cmd_disable(const char *cmd, int *rc);
 320 static int fan_write_cmd_speed(const char *cmd, int *rc);
 321 static int fan_write_cmd_watchdog(const char *cmd, int *rc);
 322
 323
 324 /*
 325  * Hotkey subdriver
 326  */
 327
 328 static int hotkey_supported;
 329 static int hotkey_mask_supported;
 330 static int hotkey_orig_status;
 331 static int hotkey_orig_mask;
 332
 333 static int hotkey_init(void);
 334 static void hotkey_exit(void);
 335 static int hotkey_get(int *status, int *mask);
 336 static int hotkey_set(int status, int mask);
 337 static void hotkey_notify(struct ibm_struct *ibm, u32 event);
 338 static int hotkey_read(char *p);
 339 static int hotkey_write(char *buf);
 340
 341
 342 /*
 343  * LED subdriver
 344  */
 345
 346 enum led_access_mode {
 347         TPACPI_LED_NONE = 0,
 348         TPACPI_LED_570, /* 570 */
 349         TPACPI_LED_OLD, /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
 350         TPACPI_LED_NEW, /* all others */
 351 };
 352
 353 enum {  /* For TPACPI_LED_OLD */
 354         TPACPI_LED_EC_HLCL = 0x0c,      /* EC reg to get led to power on */
 355         TPACPI_LED_EC_HLBL = 0x0d,      /* EC reg to blink a lit led */
 356         TPACPI_LED_EC_HLMS = 0x0e,      /* EC reg to select led to command */
 357 };
 358
 359 static enum led_access_mode led_supported;
 360 static acpi_handle led_handle;
 361
 362 static int led_init(void);
 363 static int led_read(char *p);
 364 static int led_write(char *buf);
 365
 366 /*
 367  * Light (thinklight) subdriver
 368  */
 369
 370 static int light_supported;
 371 static int light_status_supported;
 372 static acpi_handle lght_handle, ledb_handle;
 373
 374 static int light_init(void);
 375 static int light_read(char *p);
 376 static int light_write(char *buf);
 377
 378
 379 /*
 380  * Thermal subdriver
 381  */
 382
 383 enum thermal_access_mode {
 384         TPACPI_THERMAL_NONE = 0,        /* No thermal support */
 385         TPACPI_THERMAL_ACPI_TMP07,      /* Use ACPI TMP0-7 */
 386         TPACPI_THERMAL_ACPI_UPDT,       /* Use ACPI TMP0-7 with UPDT */
 387         TPACPI_THERMAL_TPEC_8,          /* Use ACPI EC regs, 8 sensors */
 388         TPACPI_THERMAL_TPEC_16,         /* Use ACPI EC regs, 16 sensors */
 389 };
 390
 391 #define TPACPI_MAX_THERMAL_SENSORS 16   /* Max thermal sensors supported */
 392 struct ibm_thermal_sensors_struct {
 393         s32 temp[TPACPI_MAX_THERMAL_SENSORS];
 394 };
 395
 396 static int thermal_init(void);
 397 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s);
 398 static int thermal_read(char *p);
 399
 400
 401 /*
 402  * Video subdriver
 403  */
 404
 405 enum video_access_mode {
 406         TPACPI_VIDEO_NONE = 0,
 407         TPACPI_VIDEO_570,       /* 570 */
 408         TPACPI_VIDEO_770,       /* 600e/x, 770e, 770x */
 409         TPACPI_VIDEO_NEW,       /* all others */
 410 };
 411
 412 static enum video_access_mode video_supported;
 413 static int video_orig_autosw;
 414 static acpi_handle vid_handle, vid2_handle;
 415
 416 static int video_init(void);
 417 static void video_exit(void);
 418 static int video_status(void);
 419 static int video_autosw(void);
 420 static int video_switch(void);
 421 static int video_switch2(int status);
 422 static int video_expand(void);
 423 static int video_read(char *p);
 424 static int video_write(char *buf);
 425
 426
 427 /*
 428  * Volume subdriver
 429  */
 430
 431 static int volume_offset = 0x30;
 432
 433 static int volume_read(char *p);
 434 static int volume_write(char *buf);
 435
 436
 437 /*
 438  * Wan subdriver
 439  */
 440
 441 static int wan_supported;
 442
 443 static int wan_init(void);
 444 static int wan_status(void);
 445 static int wan_read(char *p);
 446 static int wan_write(char *buf);
 447
 448
 449 #endif /* __THINKPAD_ACPI_H */