tjh.dev
Linux kernel mirror (for testing)
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linux
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#include <linux/mutex.h>
34
35#include <linux/nvram.h>
36#include <linux/proc_fs.h>
37#include <linux/sysfs.h>
38#include <linux/backlight.h>
39#include <linux/fb.h>
40#include <linux/platform_device.h>
41#include <linux/hwmon.h>
42#include <linux/hwmon-sysfs.h>
43#include <linux/input.h>
44#include <asm/uaccess.h>
45
46#include <linux/dmi.h>
47#include <linux/jiffies.h>
48#include <linux/workqueue.h>
49
50#include <acpi/acpi_drivers.h>
51#include <acpi/acnamesp.h>
52
53#include <linux/pci_ids.h>
54
55/****************************************************************************
56 * Main driver
57 */
58
59#define IBM_NAME "thinkpad"
60#define IBM_DESC "ThinkPad ACPI Extras"
61#define IBM_FILE IBM_NAME "_acpi"
62#define IBM_URL "http://ibm-acpi.sf.net/"
63#define IBM_MAIL "ibm-acpi-devel@lists.sourceforge.net"
64
65#define IBM_PROC_DIR "ibm"
66#define IBM_ACPI_EVENT_PREFIX "ibm"
67#define IBM_DRVR_NAME IBM_FILE
68#define IBM_HWMON_DRVR_NAME IBM_NAME "_hwmon"
69
70#define IBM_LOG IBM_FILE ": "
71#define IBM_ERR KERN_ERR IBM_LOG
72#define IBM_NOTICE KERN_NOTICE IBM_LOG
73#define IBM_INFO KERN_INFO IBM_LOG
74#define IBM_DEBUG KERN_DEBUG IBM_LOG
75
76#define IBM_MAX_ACPI_ARGS 3
77
78/* ThinkPad CMOS commands */
79#define TP_CMOS_VOLUME_DOWN 0
80#define TP_CMOS_VOLUME_UP 1
81#define TP_CMOS_VOLUME_MUTE 2
82#define TP_CMOS_BRIGHTNESS_UP 4
83#define TP_CMOS_BRIGHTNESS_DOWN 5
84
85/* ThinkPad CMOS NVRAM constants */
86#define TP_NVRAM_ADDR_BRIGHTNESS 0x5e
87#define TP_NVRAM_MASK_LEVEL_BRIGHTNESS 0x0f
88#define TP_NVRAM_POS_LEVEL_BRIGHTNESS 0
89
90#define onoff(status,bit) ((status) & (1 << (bit)) ? "on" : "off")
91#define enabled(status,bit) ((status) & (1 << (bit)) ? "enabled" : "disabled")
92#define strlencmp(a,b) (strncmp((a), (b), strlen(b)))
93
94/* Debugging */
95#define TPACPI_DBG_ALL 0xffff
96#define TPACPI_DBG_ALL 0xffff
97#define TPACPI_DBG_INIT 0x0001
98#define TPACPI_DBG_EXIT 0x0002
99#define dbg_printk(a_dbg_level, format, arg...) \
100 do { if (dbg_level & a_dbg_level) \
101 printk(IBM_DEBUG "%s: " format, __func__ , ## arg); } while (0)
102#ifdef CONFIG_THINKPAD_ACPI_DEBUG
103#define vdbg_printk(a_dbg_level, format, arg...) \
104 dbg_printk(a_dbg_level, format, ## arg)
105static const char *str_supported(int is_supported);
106#else
107#define vdbg_printk(a_dbg_level, format, arg...)
108#endif
109
110/* Input IDs */
111#define TPACPI_HKEY_INPUT_VENDOR PCI_VENDOR_ID_IBM
112#define TPACPI_HKEY_INPUT_PRODUCT 0x5054 /* "TP" */
113#define TPACPI_HKEY_INPUT_VERSION 0x4101
114
115/* ACPI HIDs */
116#define IBM_HKEY_HID "IBM0068"
117
118/* ACPI helpers */
119static int __must_check acpi_evalf(acpi_handle handle,
120 void *res, char *method, char *fmt, ...);
121static int __must_check acpi_ec_read(int i, u8 * p);
122static int __must_check acpi_ec_write(int i, u8 v);
123static int __must_check _sta(acpi_handle handle);
124
125/* ACPI handles */
126static acpi_handle root_handle; /* root namespace */
127static acpi_handle ec_handle; /* EC */
128static acpi_handle ecrd_handle, ecwr_handle; /* 570 EC access */
129static acpi_handle cmos_handle, hkey_handle; /* basic thinkpad handles */
130
131static void drv_acpi_handle_init(char *name,
132 acpi_handle *handle, acpi_handle parent,
133 char **paths, int num_paths, char **path);
134#define IBM_ACPIHANDLE_INIT(object) \
135 drv_acpi_handle_init(#object, &object##_handle, *object##_parent, \
136 object##_paths, ARRAY_SIZE(object##_paths), &object##_path)
137
138/* ThinkPad ACPI helpers */
139static int issue_thinkpad_cmos_command(int cmos_cmd);
140
141/* procfs support */
142static struct proc_dir_entry *proc_dir;
143
144/* procfs helpers */
145static int dispatch_procfs_read(char *page, char **start, off_t off,
146 int count, int *eof, void *data);
147static int dispatch_procfs_write(struct file *file,
148 const char __user * userbuf,
149 unsigned long count, void *data);
150static char *next_cmd(char **cmds);
151
152/* sysfs support */
153struct attribute_set {
154 unsigned int members, max_members;
155 struct attribute_group group;
156};
157
158static struct attribute_set *create_attr_set(unsigned int max_members,
159 const char* name);
160#define destroy_attr_set(_set) \
161 kfree(_set);
162static int add_to_attr_set(struct attribute_set* s, struct attribute *attr);
163static int add_many_to_attr_set(struct attribute_set* s,
164 struct attribute **attr,
165 unsigned int count);
166#define register_attr_set_with_sysfs(_attr_set, _kobj) \
167 sysfs_create_group(_kobj, &_attr_set->group)
168static void delete_attr_set(struct attribute_set* s, struct kobject *kobj);
169
170static int parse_strtoul(const char *buf, unsigned long max,
171 unsigned long *value);
172
173/* Device model */
174static struct platform_device *tpacpi_pdev;
175static struct platform_device *tpacpi_sensors_pdev;
176static struct device *tpacpi_hwmon;
177static struct platform_driver tpacpi_pdriver;
178static struct input_dev *tpacpi_inputdev;
179static int tpacpi_create_driver_attributes(struct device_driver *drv);
180static void tpacpi_remove_driver_attributes(struct device_driver *drv);
181
182/* Module */
183static int experimental;
184static u32 dbg_level;
185static int force_load;
186static unsigned int hotkey_report_mode;
187
188static int thinkpad_acpi_module_init(void);
189static void thinkpad_acpi_module_exit(void);
190
191
192/****************************************************************************
193 * Subdrivers
194 */
195
196struct ibm_struct;
197
198struct tp_acpi_drv_struct {
199 const struct acpi_device_id *hid;
200 struct acpi_driver *driver;
201
202 void (*notify) (struct ibm_struct *, u32);
203 acpi_handle *handle;
204 u32 type;
205 struct acpi_device *device;
206};
207
208struct ibm_struct {
209 char *name;
210
211 int (*read) (char *);
212 int (*write) (char *);
213 void (*exit) (void);
214 void (*resume) (void);
215
216 struct list_head all_drivers;
217
218 struct tp_acpi_drv_struct *acpi;
219
220 struct {
221 u8 acpi_driver_registered:1;
222 u8 acpi_notify_installed:1;
223 u8 proc_created:1;
224 u8 init_called:1;
225 u8 experimental:1;
226 } flags;
227};
228
229struct ibm_init_struct {
230 char param[32];
231
232 int (*init) (struct ibm_init_struct *);
233 struct ibm_struct *data;
234};
235
236static struct {
237#ifdef CONFIG_THINKPAD_ACPI_BAY
238 u32 bay_status:1;
239 u32 bay_eject:1;
240 u32 bay_status2:1;
241 u32 bay_eject2:1;
242#endif
243 u32 bluetooth:1;
244 u32 hotkey:1;
245 u32 hotkey_mask:1;
246 u32 hotkey_wlsw:1;
247 u32 light:1;
248 u32 light_status:1;
249 u32 bright_16levels:1;
250 u32 wan:1;
251 u32 fan_ctrl_status_undef:1;
252 u32 input_device_registered:1;
253 u32 platform_drv_registered:1;
254 u32 platform_drv_attrs_registered:1;
255 u32 sensors_pdrv_registered:1;
256 u32 sensors_pdrv_attrs_registered:1;
257 u32 sensors_pdev_attrs_registered:1;
258} tp_features;
259
260struct thinkpad_id_data {
261 unsigned int vendor; /* ThinkPad vendor:
262 * PCI_VENDOR_ID_IBM/PCI_VENDOR_ID_LENOVO */
263
264 char *bios_version_str; /* Something like 1ZET51WW (1.03z) */
265 char *ec_version_str; /* Something like 1ZHT51WW-1.04a */
266
267 u16 bios_model; /* Big Endian, TP-1Y = 0x5931, 0 = unknown */
268 u16 ec_model;
269
270 char *model_str;
271};
272
273static struct thinkpad_id_data thinkpad_id;
274
275static struct list_head tpacpi_all_drivers;
276
277static struct ibm_init_struct ibms_init[];
278static int set_ibm_param(const char *val, struct kernel_param *kp);
279static int ibm_init(struct ibm_init_struct *iibm);
280static void ibm_exit(struct ibm_struct *ibm);
281
282
283/*
284 * procfs master subdriver
285 */
286static int thinkpad_acpi_driver_init(struct ibm_init_struct *iibm);
287static int thinkpad_acpi_driver_read(char *p);
288
289
290/*
291 * Bay subdriver
292 */
293
294#ifdef CONFIG_THINKPAD_ACPI_BAY
295static acpi_handle bay_handle, bay_ej_handle;
296static acpi_handle bay2_handle, bay2_ej_handle;
297
298static int bay_init(struct ibm_init_struct *iibm);
299static void bay_notify(struct ibm_struct *ibm, u32 event);
300static int bay_read(char *p);
301static int bay_write(char *buf);
302#endif /* CONFIG_THINKPAD_ACPI_BAY */
303
304
305/*
306 * Beep subdriver
307 */
308
309static acpi_handle beep_handle;
310
311static int beep_read(char *p);
312static int beep_write(char *buf);
313
314
315/*
316 * Bluetooth subdriver
317 */
318
319enum {
320 /* ACPI GBDC/SBDC bits */
321 TP_ACPI_BLUETOOTH_HWPRESENT = 0x01, /* Bluetooth hw available */
322 TP_ACPI_BLUETOOTH_RADIOSSW = 0x02, /* Bluetooth radio enabled */
323 TP_ACPI_BLUETOOTH_UNK = 0x04, /* unknown function */
324};
325
326static int bluetooth_init(struct ibm_init_struct *iibm);
327static int bluetooth_get_radiosw(void);
328static int bluetooth_set_radiosw(int radio_on);
329static int bluetooth_read(char *p);
330static int bluetooth_write(char *buf);
331
332
333/*
334 * Brightness (backlight) subdriver
335 */
336
337#define TPACPI_BACKLIGHT_DEV_NAME "thinkpad_screen"
338
339static struct backlight_device *ibm_backlight_device;
340static int brightness_offset = 0x31;
341static int brightness_mode;
342static unsigned int brightness_enable; /* 0 = no, 1 = yes, 2 = auto */
343
344static int brightness_init(struct ibm_init_struct *iibm);
345static void brightness_exit(void);
346static int brightness_get(struct backlight_device *bd);
347static int brightness_set(int value);
348static int brightness_update_status(struct backlight_device *bd);
349static int brightness_read(char *p);
350static int brightness_write(char *buf);
351
352
353/*
354 * CMOS subdriver
355 */
356
357static int cmos_read(char *p);
358static int cmos_write(char *buf);
359
360
361/*
362 * Dock subdriver
363 */
364
365#ifdef CONFIG_THINKPAD_ACPI_DOCK
366static acpi_handle pci_handle;
367static acpi_handle dock_handle;
368
369static void dock_notify(struct ibm_struct *ibm, u32 event);
370static int dock_read(char *p);
371static int dock_write(char *buf);
372#endif /* CONFIG_THINKPAD_ACPI_DOCK */
373
374
375/*
376 * EC dump subdriver
377 */
378
379static int ecdump_read(char *p) ;
380static int ecdump_write(char *buf);
381
382
383/*
384 * Fan subdriver
385 */
386
387enum { /* Fan control constants */
388 fan_status_offset = 0x2f, /* EC register 0x2f */
389 fan_rpm_offset = 0x84, /* EC register 0x84: LSB, 0x85 MSB (RPM)
390 * 0x84 must be read before 0x85 */
391
392 TP_EC_FAN_FULLSPEED = 0x40, /* EC fan mode: full speed */
393 TP_EC_FAN_AUTO = 0x80, /* EC fan mode: auto fan control */
394
395 TPACPI_FAN_LAST_LEVEL = 0x100, /* Use cached last-seen fan level */
396};
397
398enum fan_status_access_mode {
399 TPACPI_FAN_NONE = 0, /* No fan status or control */
400 TPACPI_FAN_RD_ACPI_GFAN, /* Use ACPI GFAN */
401 TPACPI_FAN_RD_TPEC, /* Use ACPI EC regs 0x2f, 0x84-0x85 */
402};
403
404enum fan_control_access_mode {
405 TPACPI_FAN_WR_NONE = 0, /* No fan control */
406 TPACPI_FAN_WR_ACPI_SFAN, /* Use ACPI SFAN */
407 TPACPI_FAN_WR_TPEC, /* Use ACPI EC reg 0x2f */
408 TPACPI_FAN_WR_ACPI_FANS, /* Use ACPI FANS and EC reg 0x2f */
409};
410
411enum fan_control_commands {
412 TPACPI_FAN_CMD_SPEED = 0x0001, /* speed command */
413 TPACPI_FAN_CMD_LEVEL = 0x0002, /* level command */
414 TPACPI_FAN_CMD_ENABLE = 0x0004, /* enable/disable cmd,
415 * and also watchdog cmd */
416};
417
418static int fan_control_allowed;
419
420static enum fan_status_access_mode fan_status_access_mode;
421static enum fan_control_access_mode fan_control_access_mode;
422static enum fan_control_commands fan_control_commands;
423static u8 fan_control_initial_status;
424static u8 fan_control_desired_level;
425static int fan_watchdog_maxinterval;
426
427static struct mutex fan_mutex;
428
429static acpi_handle fans_handle, gfan_handle, sfan_handle;
430
431static int fan_init(struct ibm_init_struct *iibm);
432static void fan_exit(void);
433static int fan_get_status(u8 *status);
434static int fan_get_status_safe(u8 *status);
435static int fan_get_speed(unsigned int *speed);
436static void fan_update_desired_level(u8 status);
437static void fan_watchdog_fire(struct work_struct *ignored);
438static void fan_watchdog_reset(void);
439static int fan_set_level(int level);
440static int fan_set_level_safe(int level);
441static int fan_set_enable(void);
442static int fan_set_disable(void);
443static int fan_set_speed(int speed);
444static int fan_read(char *p);
445static int fan_write(char *buf);
446static int fan_write_cmd_level(const char *cmd, int *rc);
447static int fan_write_cmd_enable(const char *cmd, int *rc);
448static int fan_write_cmd_disable(const char *cmd, int *rc);
449static int fan_write_cmd_speed(const char *cmd, int *rc);
450static int fan_write_cmd_watchdog(const char *cmd, int *rc);
451
452
453/*
454 * Hotkey subdriver
455 */
456
457static int hotkey_orig_status;
458static u32 hotkey_orig_mask;
459
460static struct mutex hotkey_mutex;
461
462static int hotkey_init(struct ibm_init_struct *iibm);
463static void hotkey_exit(void);
464static int hotkey_get(int *status, u32 *mask);
465static int hotkey_set(int status, u32 mask);
466static void hotkey_notify(struct ibm_struct *ibm, u32 event);
467static int hotkey_read(char *p);
468static int hotkey_write(char *buf);
469
470
471/*
472 * LED subdriver
473 */
474
475enum led_access_mode {
476 TPACPI_LED_NONE = 0,
477 TPACPI_LED_570, /* 570 */
478 TPACPI_LED_OLD, /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
479 TPACPI_LED_NEW, /* all others */
480};
481
482enum { /* For TPACPI_LED_OLD */
483 TPACPI_LED_EC_HLCL = 0x0c, /* EC reg to get led to power on */
484 TPACPI_LED_EC_HLBL = 0x0d, /* EC reg to blink a lit led */
485 TPACPI_LED_EC_HLMS = 0x0e, /* EC reg to select led to command */
486};
487
488static enum led_access_mode led_supported;
489static acpi_handle led_handle;
490
491static int led_init(struct ibm_init_struct *iibm);
492static int led_read(char *p);
493static int led_write(char *buf);
494
495/*
496 * Light (thinklight) subdriver
497 */
498
499static acpi_handle lght_handle, ledb_handle;
500
501static int light_init(struct ibm_init_struct *iibm);
502static int light_read(char *p);
503static int light_write(char *buf);
504
505
506/*
507 * Thermal subdriver
508 */
509
510enum thermal_access_mode {
511 TPACPI_THERMAL_NONE = 0, /* No thermal support */
512 TPACPI_THERMAL_ACPI_TMP07, /* Use ACPI TMP0-7 */
513 TPACPI_THERMAL_ACPI_UPDT, /* Use ACPI TMP0-7 with UPDT */
514 TPACPI_THERMAL_TPEC_8, /* Use ACPI EC regs, 8 sensors */
515 TPACPI_THERMAL_TPEC_16, /* Use ACPI EC regs, 16 sensors */
516};
517
518enum { /* TPACPI_THERMAL_TPEC_* */
519 TP_EC_THERMAL_TMP0 = 0x78, /* ACPI EC regs TMP 0..7 */
520 TP_EC_THERMAL_TMP8 = 0xC0, /* ACPI EC regs TMP 8..15 */
521 TP_EC_THERMAL_TMP_NA = -128, /* ACPI EC sensor not available */
522};
523
524#define TPACPI_MAX_THERMAL_SENSORS 16 /* Max thermal sensors supported */
525struct ibm_thermal_sensors_struct {
526 s32 temp[TPACPI_MAX_THERMAL_SENSORS];
527};
528
529static enum thermal_access_mode thermal_read_mode;
530
531static int thermal_init(struct ibm_init_struct *iibm);
532static int thermal_get_sensor(int idx, s32 *value);
533static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s);
534static int thermal_read(char *p);
535
536
537/*
538 * Video subdriver
539 */
540
541enum video_access_mode {
542 TPACPI_VIDEO_NONE = 0,
543 TPACPI_VIDEO_570, /* 570 */
544 TPACPI_VIDEO_770, /* 600e/x, 770e, 770x */
545 TPACPI_VIDEO_NEW, /* all others */
546};
547
548enum { /* video status flags, based on VIDEO_570 */
549 TP_ACPI_VIDEO_S_LCD = 0x01, /* LCD output enabled */
550 TP_ACPI_VIDEO_S_CRT = 0x02, /* CRT output enabled */
551 TP_ACPI_VIDEO_S_DVI = 0x08, /* DVI output enabled */
552};
553
554enum { /* TPACPI_VIDEO_570 constants */
555 TP_ACPI_VIDEO_570_PHSCMD = 0x87, /* unknown magic constant :( */
556 TP_ACPI_VIDEO_570_PHSMASK = 0x03, /* PHS bits that map to
557 * video_status_flags */
558 TP_ACPI_VIDEO_570_PHS2CMD = 0x8b, /* unknown magic constant :( */
559 TP_ACPI_VIDEO_570_PHS2SET = 0x80, /* unknown magic constant :( */
560};
561
562static enum video_access_mode video_supported;
563static int video_orig_autosw;
564static acpi_handle vid_handle, vid2_handle;
565
566static int video_init(struct ibm_init_struct *iibm);
567static void video_exit(void);
568static int video_outputsw_get(void);
569static int video_outputsw_set(int status);
570static int video_autosw_get(void);
571static int video_autosw_set(int enable);
572static int video_outputsw_cycle(void);
573static int video_expand_toggle(void);
574static int video_read(char *p);
575static int video_write(char *buf);
576
577
578/*
579 * Volume subdriver
580 */
581
582static int volume_offset = 0x30;
583
584static int volume_read(char *p);
585static int volume_write(char *buf);
586
587
588/*
589 * Wan subdriver
590 */
591
592enum {
593 /* ACPI GWAN/SWAN bits */
594 TP_ACPI_WANCARD_HWPRESENT = 0x01, /* Wan hw available */
595 TP_ACPI_WANCARD_RADIOSSW = 0x02, /* Wan radio enabled */
596 TP_ACPI_WANCARD_UNK = 0x04, /* unknown function */
597};
598
599static int wan_init(struct ibm_init_struct *iibm);
600static int wan_get_radiosw(void);
601static int wan_set_radiosw(int radio_on);
602static int wan_read(char *p);
603static int wan_write(char *buf);
604
605
606#endif /* __THINKPAD_ACPI_H */