blob: 4c0743660e9c7684c12184b9824c94ffe655f4eb [file] [log] [blame]
Nicolas Boichat6f2fad72007-05-08 00:24:52 -07001/*
2 * drivers/hwmon/applesmc.c - driver for Apple's SMC (accelerometer, temperature
3 * sensors, fan control, keyboard backlight control) used in Intel-based Apple
4 * computers.
5 *
6 * Copyright (C) 2007 Nicolas Boichat <nicolas@boichat.ch>
Henrik Rydberg41e71f92010-11-09 15:15:11 +00007 * Copyright (C) 2010 Henrik Rydberg <rydberg@euromail.se>
Nicolas Boichat6f2fad72007-05-08 00:24:52 -07008 *
9 * Based on hdaps.c driver:
10 * Copyright (C) 2005 Robert Love <rml@novell.com>
11 * Copyright (C) 2005 Jesper Juhl <jesper.juhl@gmail.com>
12 *
13 * Fan control based on smcFanControl:
14 * Copyright (C) 2006 Hendrik Holtmann <holtmann@mac.com>
15 *
16 * This program is free software; you can redistribute it and/or modify it
17 * under the terms of the GNU General Public License v2 as published by the
18 * Free Software Foundation.
19 *
20 * This program is distributed in the hope that it will be useful, but WITHOUT
21 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
22 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
23 * more details.
24 *
25 * You should have received a copy of the GNU General Public License along with
26 * this program; if not, write to the Free Software Foundation, Inc.,
27 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
28 */
29
Joe Perches1ee7c712010-11-09 15:15:03 +000030#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
31
Nicolas Boichat6f2fad72007-05-08 00:24:52 -070032#include <linux/delay.h>
33#include <linux/platform_device.h>
Dmitry Torokhovd5cf2b92007-09-26 00:01:35 -040034#include <linux/input-polldev.h>
Nicolas Boichat6f2fad72007-05-08 00:24:52 -070035#include <linux/kernel.h>
Henrik Rydberg58745832010-11-10 10:58:03 +000036#include <linux/slab.h>
Nicolas Boichat6f2fad72007-05-08 00:24:52 -070037#include <linux/module.h>
38#include <linux/timer.h>
39#include <linux/dmi.h>
40#include <linux/mutex.h>
41#include <linux/hwmon-sysfs.h>
H Hartley Sweeten6055fae2009-09-15 17:18:13 +020042#include <linux/io.h>
Nicolas Boichat6f2fad72007-05-08 00:24:52 -070043#include <linux/leds.h>
44#include <linux/hwmon.h>
45#include <linux/workqueue.h>
46
47/* data port used by Apple SMC */
48#define APPLESMC_DATA_PORT 0x300
49/* command/status port used by Apple SMC */
50#define APPLESMC_CMD_PORT 0x304
51
52#define APPLESMC_NR_PORTS 32 /* 0x300-0x31f */
53
54#define APPLESMC_MAX_DATA_LENGTH 32
55
Henrik Rydberg58745832010-11-10 10:58:03 +000056/* wait up to 32 ms for a status change. */
Henrik Rydberg8c9398d2008-10-18 20:27:43 -070057#define APPLESMC_MIN_WAIT 0x0040
58#define APPLESMC_MAX_WAIT 0x8000
59
Nicolas Boichat6f2fad72007-05-08 00:24:52 -070060#define APPLESMC_STATUS_MASK 0x0f
61#define APPLESMC_READ_CMD 0x10
62#define APPLESMC_WRITE_CMD 0x11
63#define APPLESMC_GET_KEY_BY_INDEX_CMD 0x12
64#define APPLESMC_GET_KEY_TYPE_CMD 0x13
65
66#define KEY_COUNT_KEY "#KEY" /* r-o ui32 */
67
Henrik Rydberg8bd1a122008-10-18 20:27:39 -070068#define LIGHT_SENSOR_LEFT_KEY "ALV0" /* r-o {alv (6-10 bytes) */
69#define LIGHT_SENSOR_RIGHT_KEY "ALV1" /* r-o {alv (6-10 bytes) */
Dmitry Torokhovd5cf2b92007-09-26 00:01:35 -040070#define BACKLIGHT_KEY "LKSB" /* w-o {lkb (2 bytes) */
Nicolas Boichat6f2fad72007-05-08 00:24:52 -070071
Dmitry Torokhovd5cf2b92007-09-26 00:01:35 -040072#define CLAMSHELL_KEY "MSLD" /* r-o ui8 (unused) */
Nicolas Boichat6f2fad72007-05-08 00:24:52 -070073
74#define MOTION_SENSOR_X_KEY "MO_X" /* r-o sp78 (2 bytes) */
75#define MOTION_SENSOR_Y_KEY "MO_Y" /* r-o sp78 (2 bytes) */
76#define MOTION_SENSOR_Z_KEY "MO_Z" /* r-o sp78 (2 bytes) */
77#define MOTION_SENSOR_KEY "MOCN" /* r/w ui16 */
78
79#define FANS_COUNT "FNum" /* r-o ui8 */
80#define FANS_MANUAL "FS! " /* r-w ui16 */
Henrik Rydberg3eba2bf2010-11-09 15:15:08 +000081#define FAN_ID_FMT "F%dID" /* r-o char[16] */
Nicolas Boichat6f2fad72007-05-08 00:24:52 -070082
Nicolas Boichat6f2fad72007-05-08 00:24:52 -070083/* List of keys used to read/write fan speeds */
Henrik Rydberg3eba2bf2010-11-09 15:15:08 +000084static const char *const fan_speed_fmt[] = {
85 "F%dAc", /* actual speed */
86 "F%dMn", /* minimum speed (rw) */
87 "F%dMx", /* maximum speed */
88 "F%dSf", /* safe speed - not all models */
89 "F%dTg", /* target speed (manual: rw) */
Nicolas Boichat6f2fad72007-05-08 00:24:52 -070090};
91
92#define INIT_TIMEOUT_MSECS 5000 /* wait up to 5s for device init ... */
93#define INIT_WAIT_MSECS 50 /* ... in 50ms increments */
94
Dmitry Torokhovd5cf2b92007-09-26 00:01:35 -040095#define APPLESMC_POLL_INTERVAL 50 /* msecs */
Nicolas Boichat6f2fad72007-05-08 00:24:52 -070096#define APPLESMC_INPUT_FUZZ 4 /* input event threshold */
97#define APPLESMC_INPUT_FLAT 4
98
99#define SENSOR_X 0
100#define SENSOR_Y 1
101#define SENSOR_Z 2
102
Henrik Rydberg3eba2bf2010-11-09 15:15:08 +0000103#define to_index(attr) (to_sensor_dev_attr(attr)->index & 0xffff)
104#define to_option(attr) (to_sensor_dev_attr(attr)->index >> 16)
Henrik Rydberg9792dad2010-11-10 10:58:04 +0000105
Henrik Rydberg9792dad2010-11-10 10:58:04 +0000106/* Dynamic device node attributes */
107struct applesmc_dev_attr {
108 struct sensor_device_attribute sda; /* hwmon attributes */
109 char name[32]; /* room for node file name */
110};
111
112/* Dynamic device node group */
113struct applesmc_node_group {
114 char *format; /* format string */
115 void *show; /* show function */
116 void *store; /* store function */
Henrik Rydberg3eba2bf2010-11-09 15:15:08 +0000117 int option; /* function argument */
Henrik Rydberg9792dad2010-11-10 10:58:04 +0000118 struct applesmc_dev_attr *nodes; /* dynamic node array */
119};
120
Henrik Rydberg58745832010-11-10 10:58:03 +0000121/* AppleSMC entry - cached register information */
122struct applesmc_entry {
123 char key[5]; /* four-letter key code */
124 u8 valid; /* set when entry is successfully read once */
125 u8 len; /* bounded by APPLESMC_MAX_DATA_LENGTH */
126 char type[5]; /* four-letter type code */
127 u8 flags; /* 0x10: func; 0x40: write; 0x80: read */
128};
129
130/* Register lookup and registers common to all SMCs */
131static struct applesmc_registers {
132 struct mutex mutex; /* register read/write mutex */
133 unsigned int key_count; /* number of SMC registers */
Henrik Rydberg3eba2bf2010-11-09 15:15:08 +0000134 unsigned int fan_count; /* number of fans */
Henrik Rydberg9792dad2010-11-10 10:58:04 +0000135 unsigned int temp_count; /* number of temperature registers */
136 unsigned int temp_begin; /* temperature lower index bound */
137 unsigned int temp_end; /* temperature upper index bound */
Henrik Rydberg40ef06f2010-11-10 10:58:05 +0000138 int num_light_sensors; /* number of light sensors */
139 bool has_accelerometer; /* has motion sensor */
140 bool has_key_backlight; /* has keyboard backlight */
Henrik Rydberg58745832010-11-10 10:58:03 +0000141 bool init_complete; /* true when fully initialized */
142 struct applesmc_entry *cache; /* cached key entries */
143} smcreg = {
144 .mutex = __MUTEX_INITIALIZER(smcreg.mutex),
145};
146
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700147static const int debug;
148static struct platform_device *pdev;
149static s16 rest_x;
150static s16 rest_y;
Henrik Rydberga976f152009-09-21 17:04:50 -0700151static u8 backlight_state[2];
152
Tony Jones1beeffe2007-08-20 13:46:20 -0700153static struct device *hwmon_dev;
Dmitry Torokhovd5cf2b92007-09-26 00:01:35 -0400154static struct input_polled_dev *applesmc_idev;
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700155
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700156/*
157 * Last index written to key_at_index sysfs file, and value to use for all other
158 * key_at_index_* sysfs files.
159 */
160static unsigned int key_at_index;
161
162static struct workqueue_struct *applesmc_led_wq;
163
164/*
Henrik Rydberg8c9398d2008-10-18 20:27:43 -0700165 * __wait_status - Wait up to 32ms for the status port to get a certain value
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700166 * (masked with 0x0f), returning zero if the value is obtained. Callers must
167 * hold applesmc_lock.
168 */
169static int __wait_status(u8 val)
170{
Henrik Rydberg8c9398d2008-10-18 20:27:43 -0700171 int us;
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700172
173 val = val & APPLESMC_STATUS_MASK;
174
Henrik Rydberg8c9398d2008-10-18 20:27:43 -0700175 for (us = APPLESMC_MIN_WAIT; us < APPLESMC_MAX_WAIT; us <<= 1) {
176 udelay(us);
Guenter Roeck2bfe8142010-11-10 10:42:21 -0800177 if ((inb(APPLESMC_CMD_PORT) & APPLESMC_STATUS_MASK) == val)
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700178 return 0;
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700179 }
180
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700181 return -EIO;
182}
183
184/*
Henrik Rydberg84d2d7f2008-10-18 20:27:38 -0700185 * special treatment of command port - on newer macbooks, it seems necessary
186 * to resend the command byte before polling the status again. Callers must
187 * hold applesmc_lock.
188 */
189static int send_command(u8 cmd)
190{
Henrik Rydberg8c9398d2008-10-18 20:27:43 -0700191 int us;
192 for (us = APPLESMC_MIN_WAIT; us < APPLESMC_MAX_WAIT; us <<= 1) {
Henrik Rydberg84d2d7f2008-10-18 20:27:38 -0700193 outb(cmd, APPLESMC_CMD_PORT);
Henrik Rydberg8c9398d2008-10-18 20:27:43 -0700194 udelay(us);
Henrik Rydberg84d2d7f2008-10-18 20:27:38 -0700195 if ((inb(APPLESMC_CMD_PORT) & APPLESMC_STATUS_MASK) == 0x0c)
196 return 0;
Henrik Rydberg84d2d7f2008-10-18 20:27:38 -0700197 }
Henrik Rydberg84d2d7f2008-10-18 20:27:38 -0700198 return -EIO;
199}
200
Henrik Rydberg58745832010-11-10 10:58:03 +0000201static int send_argument(const char *key)
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700202{
203 int i;
204
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700205 for (i = 0; i < 4; i++) {
206 outb(key[i], APPLESMC_DATA_PORT);
207 if (__wait_status(0x04))
208 return -EIO;
209 }
Henrik Rydberg58745832010-11-10 10:58:03 +0000210 return 0;
211}
212
213static int read_smc(u8 cmd, const char *key, u8 *buffer, u8 len)
214{
215 int i;
216
217 if (send_command(cmd) || send_argument(key)) {
218 pr_warn("%s: read arg fail\n", key);
219 return -EIO;
220 }
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700221
222 outb(len, APPLESMC_DATA_PORT);
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700223
224 for (i = 0; i < len; i++) {
Henrik Rydberg58745832010-11-10 10:58:03 +0000225 if (__wait_status(0x05)) {
226 pr_warn("%s: read data fail\n", key);
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700227 return -EIO;
Henrik Rydberg58745832010-11-10 10:58:03 +0000228 }
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700229 buffer[i] = inb(APPLESMC_DATA_PORT);
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700230 }
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700231
232 return 0;
233}
234
Henrik Rydberg58745832010-11-10 10:58:03 +0000235static int write_smc(u8 cmd, const char *key, const u8 *buffer, u8 len)
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700236{
237 int i;
238
Henrik Rydberg58745832010-11-10 10:58:03 +0000239 if (send_command(cmd) || send_argument(key)) {
240 pr_warn("%s: write arg fail\n", key);
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700241 return -EIO;
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700242 }
243
244 outb(len, APPLESMC_DATA_PORT);
245
246 for (i = 0; i < len; i++) {
Henrik Rydberg58745832010-11-10 10:58:03 +0000247 if (__wait_status(0x04)) {
248 pr_warn("%s: write data fail\n", key);
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700249 return -EIO;
Henrik Rydberg58745832010-11-10 10:58:03 +0000250 }
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700251 outb(buffer[i], APPLESMC_DATA_PORT);
252 }
253
254 return 0;
255}
256
Henrik Rydberg58745832010-11-10 10:58:03 +0000257static int read_register_count(unsigned int *count)
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700258{
Henrik Rydberg58745832010-11-10 10:58:03 +0000259 __be32 be;
260 int ret;
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700261
Henrik Rydberg58745832010-11-10 10:58:03 +0000262 ret = read_smc(APPLESMC_READ_CMD, KEY_COUNT_KEY, (u8 *)&be, 4);
263 if (ret)
264 return ret;
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700265
Henrik Rydberg58745832010-11-10 10:58:03 +0000266 *count = be32_to_cpu(be);
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700267 return 0;
268}
269
270/*
Henrik Rydberg58745832010-11-10 10:58:03 +0000271 * Serialized I/O
272 *
273 * Returns zero on success or a negative error on failure.
274 * All functions below are concurrency safe - callers should NOT hold lock.
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700275 */
Henrik Rydberg58745832010-11-10 10:58:03 +0000276
277static int applesmc_read_entry(const struct applesmc_entry *entry,
278 u8 *buf, u8 len)
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700279{
Henrik Rydberg58745832010-11-10 10:58:03 +0000280 int ret;
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700281
Henrik Rydberg58745832010-11-10 10:58:03 +0000282 if (entry->len != len)
283 return -EINVAL;
284 mutex_lock(&smcreg.mutex);
285 ret = read_smc(APPLESMC_READ_CMD, entry->key, buf, len);
286 mutex_unlock(&smcreg.mutex);
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700287
Henrik Rydberg58745832010-11-10 10:58:03 +0000288 return ret;
289}
290
291static int applesmc_write_entry(const struct applesmc_entry *entry,
292 const u8 *buf, u8 len)
293{
294 int ret;
295
296 if (entry->len != len)
297 return -EINVAL;
298 mutex_lock(&smcreg.mutex);
299 ret = write_smc(APPLESMC_WRITE_CMD, entry->key, buf, len);
300 mutex_unlock(&smcreg.mutex);
301 return ret;
302}
303
304static const struct applesmc_entry *applesmc_get_entry_by_index(int index)
305{
306 struct applesmc_entry *cache = &smcreg.cache[index];
307 u8 key[4], info[6];
308 __be32 be;
309 int ret = 0;
310
311 if (cache->valid)
312 return cache;
313
314 mutex_lock(&smcreg.mutex);
315
316 if (cache->valid)
317 goto out;
318 be = cpu_to_be32(index);
319 ret = read_smc(APPLESMC_GET_KEY_BY_INDEX_CMD, (u8 *)&be, key, 4);
320 if (ret)
321 goto out;
322 ret = read_smc(APPLESMC_GET_KEY_TYPE_CMD, key, info, 6);
323 if (ret)
324 goto out;
325
326 memcpy(cache->key, key, 4);
327 cache->len = info[0];
328 memcpy(cache->type, &info[1], 4);
329 cache->flags = info[5];
330 cache->valid = 1;
331
332out:
333 mutex_unlock(&smcreg.mutex);
334 if (ret)
335 return ERR_PTR(ret);
336 return cache;
337}
338
339static int applesmc_get_lower_bound(unsigned int *lo, const char *key)
340{
341 int begin = 0, end = smcreg.key_count;
342 const struct applesmc_entry *entry;
343
344 while (begin != end) {
345 int middle = begin + (end - begin) / 2;
346 entry = applesmc_get_entry_by_index(middle);
347 if (IS_ERR(entry))
348 return PTR_ERR(entry);
349 if (strcmp(entry->key, key) < 0)
350 begin = middle + 1;
351 else
352 end = middle;
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700353 }
354
Henrik Rydberg58745832010-11-10 10:58:03 +0000355 *lo = begin;
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700356 return 0;
357}
358
Henrik Rydberg58745832010-11-10 10:58:03 +0000359static int applesmc_get_upper_bound(unsigned int *hi, const char *key)
360{
361 int begin = 0, end = smcreg.key_count;
362 const struct applesmc_entry *entry;
363
364 while (begin != end) {
365 int middle = begin + (end - begin) / 2;
366 entry = applesmc_get_entry_by_index(middle);
367 if (IS_ERR(entry))
368 return PTR_ERR(entry);
369 if (strcmp(key, entry->key) < 0)
370 end = middle;
371 else
372 begin = middle + 1;
373 }
374
375 *hi = begin;
376 return 0;
377}
378
379static const struct applesmc_entry *applesmc_get_entry_by_key(const char *key)
380{
381 int begin, end;
382 int ret;
383
384 ret = applesmc_get_lower_bound(&begin, key);
385 if (ret)
386 return ERR_PTR(ret);
387 ret = applesmc_get_upper_bound(&end, key);
388 if (ret)
389 return ERR_PTR(ret);
390 if (end - begin != 1)
391 return ERR_PTR(-EINVAL);
392
393 return applesmc_get_entry_by_index(begin);
394}
395
396static int applesmc_read_key(const char *key, u8 *buffer, u8 len)
397{
398 const struct applesmc_entry *entry;
399
400 entry = applesmc_get_entry_by_key(key);
401 if (IS_ERR(entry))
402 return PTR_ERR(entry);
403
404 return applesmc_read_entry(entry, buffer, len);
405}
406
407static int applesmc_write_key(const char *key, const u8 *buffer, u8 len)
408{
409 const struct applesmc_entry *entry;
410
411 entry = applesmc_get_entry_by_key(key);
412 if (IS_ERR(entry))
413 return PTR_ERR(entry);
414
415 return applesmc_write_entry(entry, buffer, len);
416}
417
Henrik Rydberg40ef06f2010-11-10 10:58:05 +0000418static int applesmc_has_key(const char *key, bool *value)
419{
420 const struct applesmc_entry *entry;
421
422 entry = applesmc_get_entry_by_key(key);
423 if (IS_ERR(entry) && PTR_ERR(entry) != -EINVAL)
424 return PTR_ERR(entry);
425
426 *value = !IS_ERR(entry);
427 return 0;
428}
429
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700430/*
Henrik Rydberg58745832010-11-10 10:58:03 +0000431 * applesmc_read_motion_sensor - Read motion sensor (X, Y or Z).
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700432 */
Guenter Roeck2bfe8142010-11-10 10:42:21 -0800433static int applesmc_read_motion_sensor(int index, s16 *value)
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700434{
435 u8 buffer[2];
436 int ret;
437
438 switch (index) {
439 case SENSOR_X:
440 ret = applesmc_read_key(MOTION_SENSOR_X_KEY, buffer, 2);
441 break;
442 case SENSOR_Y:
443 ret = applesmc_read_key(MOTION_SENSOR_Y_KEY, buffer, 2);
444 break;
445 case SENSOR_Z:
446 ret = applesmc_read_key(MOTION_SENSOR_Z_KEY, buffer, 2);
447 break;
448 default:
449 ret = -EINVAL;
450 }
451
452 *value = ((s16)buffer[0] << 8) | buffer[1];
453
454 return ret;
455}
456
457/*
Henrik Rydberg2344cd02010-11-09 15:15:02 +0000458 * applesmc_device_init - initialize the accelerometer. Can sleep.
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700459 */
Henrik Rydberg2344cd02010-11-09 15:15:02 +0000460static void applesmc_device_init(void)
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700461{
Henrik Rydberg2344cd02010-11-09 15:15:02 +0000462 int total;
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700463 u8 buffer[2];
464
Henrik Rydberg40ef06f2010-11-10 10:58:05 +0000465 if (!smcreg.has_accelerometer)
Henrik Rydberg2344cd02010-11-09 15:15:02 +0000466 return;
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700467
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700468 for (total = INIT_TIMEOUT_MSECS; total > 0; total -= INIT_WAIT_MSECS) {
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700469 if (!applesmc_read_key(MOTION_SENSOR_KEY, buffer, 2) &&
Henrik Rydberg2344cd02010-11-09 15:15:02 +0000470 (buffer[0] != 0x00 || buffer[1] != 0x00))
Henrik Rydberg58745832010-11-10 10:58:03 +0000471 return;
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700472 buffer[0] = 0xe0;
473 buffer[1] = 0x00;
474 applesmc_write_key(MOTION_SENSOR_KEY, buffer, 2);
475 msleep(INIT_WAIT_MSECS);
476 }
477
Joe Perches1ee7c712010-11-09 15:15:03 +0000478 pr_warn("failed to init the device\n");
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700479}
480
481/*
Henrik Rydberg58745832010-11-10 10:58:03 +0000482 * applesmc_init_smcreg_try - Try to initialize register cache. Idempotent.
483 */
484static int applesmc_init_smcreg_try(void)
485{
486 struct applesmc_registers *s = &smcreg;
Henrik Rydberg40ef06f2010-11-10 10:58:05 +0000487 bool left_light_sensor, right_light_sensor;
Henrik Rydberg3eba2bf2010-11-09 15:15:08 +0000488 u8 tmp[1];
Henrik Rydberg58745832010-11-10 10:58:03 +0000489 int ret;
490
491 if (s->init_complete)
492 return 0;
493
494 ret = read_register_count(&s->key_count);
495 if (ret)
496 return ret;
497
498 if (!s->cache)
499 s->cache = kcalloc(s->key_count, sizeof(*s->cache), GFP_KERNEL);
500 if (!s->cache)
501 return -ENOMEM;
502
Henrik Rydberg3eba2bf2010-11-09 15:15:08 +0000503 ret = applesmc_read_key(FANS_COUNT, tmp, 1);
504 if (ret)
505 return ret;
506 s->fan_count = tmp[0];
507
Henrik Rydberg9792dad2010-11-10 10:58:04 +0000508 ret = applesmc_get_lower_bound(&s->temp_begin, "T");
509 if (ret)
510 return ret;
511 ret = applesmc_get_lower_bound(&s->temp_end, "U");
512 if (ret)
513 return ret;
514 s->temp_count = s->temp_end - s->temp_begin;
515
Henrik Rydberg40ef06f2010-11-10 10:58:05 +0000516 ret = applesmc_has_key(LIGHT_SENSOR_LEFT_KEY, &left_light_sensor);
517 if (ret)
518 return ret;
519 ret = applesmc_has_key(LIGHT_SENSOR_RIGHT_KEY, &right_light_sensor);
520 if (ret)
521 return ret;
522 ret = applesmc_has_key(MOTION_SENSOR_KEY, &s->has_accelerometer);
523 if (ret)
524 return ret;
525 ret = applesmc_has_key(BACKLIGHT_KEY, &s->has_key_backlight);
526 if (ret)
527 return ret;
528
529 s->num_light_sensors = left_light_sensor + right_light_sensor;
Henrik Rydberg58745832010-11-10 10:58:03 +0000530 s->init_complete = true;
531
Henrik Rydberg3eba2bf2010-11-09 15:15:08 +0000532 pr_info("key=%d fan=%d temp=%d acc=%d lux=%d kbd=%d\n",
533 s->key_count, s->fan_count, s->temp_count,
Henrik Rydberg40ef06f2010-11-10 10:58:05 +0000534 s->has_accelerometer,
535 s->num_light_sensors,
536 s->has_key_backlight);
Henrik Rydberg58745832010-11-10 10:58:03 +0000537
538 return 0;
539}
540
541/*
542 * applesmc_init_smcreg - Initialize register cache.
543 *
544 * Retries until initialization is successful, or the operation times out.
545 *
546 */
547static int applesmc_init_smcreg(void)
548{
549 int ms, ret;
550
551 for (ms = 0; ms < INIT_TIMEOUT_MSECS; ms += INIT_WAIT_MSECS) {
552 ret = applesmc_init_smcreg_try();
553 if (!ret) {
554 if (ms)
555 pr_info("init_smcreg() took %d ms\n", ms);
556 return 0;
557 }
558 msleep(INIT_WAIT_MSECS);
559 }
560
561 kfree(smcreg.cache);
562 smcreg.cache = NULL;
563
564 return ret;
565}
566
567static void applesmc_destroy_smcreg(void)
568{
569 kfree(smcreg.cache);
570 smcreg.cache = NULL;
571 smcreg.init_complete = false;
572}
573
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700574/* Device model stuff */
575static int applesmc_probe(struct platform_device *dev)
576{
Henrik Rydberg58745832010-11-10 10:58:03 +0000577 int ret;
578
579 ret = applesmc_init_smcreg();
580 if (ret)
581 return ret;
582
Henrik Rydberg2344cd02010-11-09 15:15:02 +0000583 applesmc_device_init();
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700584
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700585 return 0;
586}
587
Henrik Rydberga976f152009-09-21 17:04:50 -0700588/* Synchronize device with memorized backlight state */
589static int applesmc_pm_resume(struct device *dev)
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700590{
Henrik Rydberg40ef06f2010-11-10 10:58:05 +0000591 if (smcreg.has_key_backlight)
Henrik Rydberga976f152009-09-21 17:04:50 -0700592 applesmc_write_key(BACKLIGHT_KEY, backlight_state, 2);
Henrik Rydberga976f152009-09-21 17:04:50 -0700593 return 0;
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700594}
595
Henrik Rydberga976f152009-09-21 17:04:50 -0700596/* Reinitialize device on resume from hibernation */
597static int applesmc_pm_restore(struct device *dev)
598{
Henrik Rydberg2344cd02010-11-09 15:15:02 +0000599 applesmc_device_init();
Henrik Rydberga976f152009-09-21 17:04:50 -0700600 return applesmc_pm_resume(dev);
601}
602
Alexey Dobriyan47145212009-12-14 18:00:08 -0800603static const struct dev_pm_ops applesmc_pm_ops = {
Henrik Rydberga976f152009-09-21 17:04:50 -0700604 .resume = applesmc_pm_resume,
605 .restore = applesmc_pm_restore,
606};
607
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700608static struct platform_driver applesmc_driver = {
609 .probe = applesmc_probe,
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700610 .driver = {
611 .name = "applesmc",
612 .owner = THIS_MODULE,
Henrik Rydberga976f152009-09-21 17:04:50 -0700613 .pm = &applesmc_pm_ops,
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700614 },
615};
616
617/*
618 * applesmc_calibrate - Set our "resting" values. Callers must
619 * hold applesmc_lock.
620 */
621static void applesmc_calibrate(void)
622{
623 applesmc_read_motion_sensor(SENSOR_X, &rest_x);
624 applesmc_read_motion_sensor(SENSOR_Y, &rest_y);
625 rest_x = -rest_x;
626}
627
Dmitry Torokhovd5cf2b92007-09-26 00:01:35 -0400628static void applesmc_idev_poll(struct input_polled_dev *dev)
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700629{
Dmitry Torokhovd5cf2b92007-09-26 00:01:35 -0400630 struct input_dev *idev = dev->input;
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700631 s16 x, y;
632
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700633 if (applesmc_read_motion_sensor(SENSOR_X, &x))
Henrik Rydberg58745832010-11-10 10:58:03 +0000634 return;
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700635 if (applesmc_read_motion_sensor(SENSOR_Y, &y))
Henrik Rydberg58745832010-11-10 10:58:03 +0000636 return;
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700637
638 x = -x;
Dmitry Torokhovd5cf2b92007-09-26 00:01:35 -0400639 input_report_abs(idev, ABS_X, x - rest_x);
640 input_report_abs(idev, ABS_Y, y - rest_y);
641 input_sync(idev);
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700642}
643
644/* Sysfs Files */
645
Nicolas Boichatfa744192007-05-23 13:58:13 -0700646static ssize_t applesmc_name_show(struct device *dev,
647 struct device_attribute *attr, char *buf)
648{
649 return snprintf(buf, PAGE_SIZE, "applesmc\n");
650}
651
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700652static ssize_t applesmc_position_show(struct device *dev,
653 struct device_attribute *attr, char *buf)
654{
655 int ret;
656 s16 x, y, z;
657
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700658 ret = applesmc_read_motion_sensor(SENSOR_X, &x);
659 if (ret)
660 goto out;
661 ret = applesmc_read_motion_sensor(SENSOR_Y, &y);
662 if (ret)
663 goto out;
664 ret = applesmc_read_motion_sensor(SENSOR_Z, &z);
665 if (ret)
666 goto out;
667
668out:
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700669 if (ret)
670 return ret;
671 else
672 return snprintf(buf, PAGE_SIZE, "(%d,%d,%d)\n", x, y, z);
673}
674
675static ssize_t applesmc_light_show(struct device *dev,
676 struct device_attribute *attr, char *sysfsbuf)
677{
Henrik Rydberg58745832010-11-10 10:58:03 +0000678 const struct applesmc_entry *entry;
Henrik Rydberg8bd1a122008-10-18 20:27:39 -0700679 static int data_length;
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700680 int ret;
681 u8 left = 0, right = 0;
Henrik Rydberg58745832010-11-10 10:58:03 +0000682 u8 buffer[10];
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700683
Henrik Rydberg8bd1a122008-10-18 20:27:39 -0700684 if (!data_length) {
Henrik Rydberg58745832010-11-10 10:58:03 +0000685 entry = applesmc_get_entry_by_key(LIGHT_SENSOR_LEFT_KEY);
686 if (IS_ERR(entry))
687 return PTR_ERR(entry);
688 if (entry->len > 10)
689 return -ENXIO;
690 data_length = entry->len;
Joe Perches1ee7c712010-11-09 15:15:03 +0000691 pr_info("light sensor data length set to %d\n", data_length);
Henrik Rydberg8bd1a122008-10-18 20:27:39 -0700692 }
693
694 ret = applesmc_read_key(LIGHT_SENSOR_LEFT_KEY, buffer, data_length);
Alex Murrayc3d63622009-01-15 13:51:08 -0800695 /* newer macbooks report a single 10-bit bigendian value */
696 if (data_length == 10) {
697 left = be16_to_cpu(*(__be16 *)(buffer + 6)) >> 2;
698 goto out;
699 }
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700700 left = buffer[2];
701 if (ret)
702 goto out;
Henrik Rydberg8bd1a122008-10-18 20:27:39 -0700703 ret = applesmc_read_key(LIGHT_SENSOR_RIGHT_KEY, buffer, data_length);
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700704 right = buffer[2];
705
706out:
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700707 if (ret)
708 return ret;
709 else
710 return snprintf(sysfsbuf, PAGE_SIZE, "(%d,%d)\n", left, right);
711}
712
Alex Murrayfa5575c2010-05-27 19:58:54 +0200713/* Displays sensor key as label */
714static ssize_t applesmc_show_sensor_label(struct device *dev,
715 struct device_attribute *devattr, char *sysfsbuf)
716{
Henrik Rydberg9792dad2010-11-10 10:58:04 +0000717 int index = smcreg.temp_begin + to_index(devattr);
718 const struct applesmc_entry *entry;
Alex Murrayfa5575c2010-05-27 19:58:54 +0200719
Henrik Rydberg9792dad2010-11-10 10:58:04 +0000720 entry = applesmc_get_entry_by_index(index);
721 if (IS_ERR(entry))
722 return PTR_ERR(entry);
723
724 return snprintf(sysfsbuf, PAGE_SIZE, "%s\n", entry->key);
Alex Murrayfa5575c2010-05-27 19:58:54 +0200725}
726
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700727/* Displays degree Celsius * 1000 */
728static ssize_t applesmc_show_temperature(struct device *dev,
729 struct device_attribute *devattr, char *sysfsbuf)
730{
Henrik Rydberg9792dad2010-11-10 10:58:04 +0000731 int index = smcreg.temp_begin + to_index(devattr);
732 const struct applesmc_entry *entry;
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700733 int ret;
734 u8 buffer[2];
735 unsigned int temp;
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700736
Henrik Rydberg9792dad2010-11-10 10:58:04 +0000737 entry = applesmc_get_entry_by_index(index);
738 if (IS_ERR(entry))
739 return PTR_ERR(entry);
Henrik Rydbergdcdea262010-11-09 15:15:06 +0000740 if (entry->len > 2)
741 return -EINVAL;
Henrik Rydberg9792dad2010-11-10 10:58:04 +0000742
Henrik Rydbergdcdea262010-11-09 15:15:06 +0000743 ret = applesmc_read_entry(entry, buffer, entry->len);
Henrik Rydberg9792dad2010-11-10 10:58:04 +0000744 if (ret)
745 return ret;
746
Henrik Rydbergdcdea262010-11-09 15:15:06 +0000747 if (entry->len == 2) {
748 temp = buffer[0] * 1000;
749 temp += (buffer[1] >> 6) * 250;
750 } else {
751 temp = buffer[0] * 4000;
752 }
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700753
Henrik Rydberg9792dad2010-11-10 10:58:04 +0000754 return snprintf(sysfsbuf, PAGE_SIZE, "%u\n", temp);
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700755}
756
757static ssize_t applesmc_show_fan_speed(struct device *dev,
758 struct device_attribute *attr, char *sysfsbuf)
759{
760 int ret;
761 unsigned int speed = 0;
762 char newkey[5];
763 u8 buffer[2];
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700764
Henrik Rydberg3eba2bf2010-11-09 15:15:08 +0000765 sprintf(newkey, fan_speed_fmt[to_option(attr)], to_index(attr));
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700766
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700767 ret = applesmc_read_key(newkey, buffer, 2);
768 speed = ((buffer[0] << 8 | buffer[1]) >> 2);
769
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700770 if (ret)
771 return ret;
772 else
773 return snprintf(sysfsbuf, PAGE_SIZE, "%u\n", speed);
774}
775
776static ssize_t applesmc_store_fan_speed(struct device *dev,
777 struct device_attribute *attr,
778 const char *sysfsbuf, size_t count)
779{
780 int ret;
Guenter Roeck2bfe8142010-11-10 10:42:21 -0800781 unsigned long speed;
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700782 char newkey[5];
783 u8 buffer[2];
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700784
Guenter Roeck2bfe8142010-11-10 10:42:21 -0800785 if (strict_strtoul(sysfsbuf, 10, &speed) < 0 || speed >= 0x4000)
786 return -EINVAL; /* Bigger than a 14-bit value */
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700787
Henrik Rydberg3eba2bf2010-11-09 15:15:08 +0000788 sprintf(newkey, fan_speed_fmt[to_option(attr)], to_index(attr));
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700789
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700790 buffer[0] = (speed >> 6) & 0xff;
791 buffer[1] = (speed << 2) & 0xff;
792 ret = applesmc_write_key(newkey, buffer, 2);
793
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700794 if (ret)
795 return ret;
796 else
797 return count;
798}
799
800static ssize_t applesmc_show_fan_manual(struct device *dev,
Henrik Rydberg3eba2bf2010-11-09 15:15:08 +0000801 struct device_attribute *attr, char *sysfsbuf)
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700802{
803 int ret;
804 u16 manual = 0;
805 u8 buffer[2];
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700806
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700807 ret = applesmc_read_key(FANS_MANUAL, buffer, 2);
Henrik Rydberg3eba2bf2010-11-09 15:15:08 +0000808 manual = ((buffer[0] << 8 | buffer[1]) >> to_index(attr)) & 0x01;
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700809
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700810 if (ret)
811 return ret;
812 else
813 return snprintf(sysfsbuf, PAGE_SIZE, "%d\n", manual);
814}
815
816static ssize_t applesmc_store_fan_manual(struct device *dev,
Henrik Rydberg3eba2bf2010-11-09 15:15:08 +0000817 struct device_attribute *attr,
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700818 const char *sysfsbuf, size_t count)
819{
820 int ret;
821 u8 buffer[2];
Guenter Roeck2bfe8142010-11-10 10:42:21 -0800822 unsigned long input;
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700823 u16 val;
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700824
Guenter Roeck2bfe8142010-11-10 10:42:21 -0800825 if (strict_strtoul(sysfsbuf, 10, &input) < 0)
826 return -EINVAL;
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700827
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700828 ret = applesmc_read_key(FANS_MANUAL, buffer, 2);
829 val = (buffer[0] << 8 | buffer[1]);
830 if (ret)
831 goto out;
832
833 if (input)
Henrik Rydberg3eba2bf2010-11-09 15:15:08 +0000834 val = val | (0x01 << to_index(attr));
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700835 else
Henrik Rydberg3eba2bf2010-11-09 15:15:08 +0000836 val = val & ~(0x01 << to_index(attr));
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700837
838 buffer[0] = (val >> 8) & 0xFF;
839 buffer[1] = val & 0xFF;
840
841 ret = applesmc_write_key(FANS_MANUAL, buffer, 2);
842
843out:
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700844 if (ret)
845 return ret;
846 else
847 return count;
848}
849
850static ssize_t applesmc_show_fan_position(struct device *dev,
851 struct device_attribute *attr, char *sysfsbuf)
852{
853 int ret;
854 char newkey[5];
855 u8 buffer[17];
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700856
Henrik Rydberg3eba2bf2010-11-09 15:15:08 +0000857 sprintf(newkey, FAN_ID_FMT, to_index(attr));
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700858
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700859 ret = applesmc_read_key(newkey, buffer, 16);
860 buffer[16] = 0;
861
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700862 if (ret)
863 return ret;
864 else
865 return snprintf(sysfsbuf, PAGE_SIZE, "%s\n", buffer+4);
866}
867
868static ssize_t applesmc_calibrate_show(struct device *dev,
869 struct device_attribute *attr, char *sysfsbuf)
870{
871 return snprintf(sysfsbuf, PAGE_SIZE, "(%d,%d)\n", rest_x, rest_y);
872}
873
874static ssize_t applesmc_calibrate_store(struct device *dev,
875 struct device_attribute *attr, const char *sysfsbuf, size_t count)
876{
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700877 applesmc_calibrate();
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700878
879 return count;
880}
881
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700882static void applesmc_backlight_set(struct work_struct *work)
883{
Henrik Rydberga976f152009-09-21 17:04:50 -0700884 applesmc_write_key(BACKLIGHT_KEY, backlight_state, 2);
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700885}
886static DECLARE_WORK(backlight_work, &applesmc_backlight_set);
887
888static void applesmc_brightness_set(struct led_classdev *led_cdev,
889 enum led_brightness value)
890{
891 int ret;
892
Henrik Rydberga976f152009-09-21 17:04:50 -0700893 backlight_state[0] = value;
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700894 ret = queue_work(applesmc_led_wq, &backlight_work);
895
896 if (debug && (!ret))
897 printk(KERN_DEBUG "applesmc: work was already on the queue.\n");
898}
899
900static ssize_t applesmc_key_count_show(struct device *dev,
901 struct device_attribute *attr, char *sysfsbuf)
902{
903 int ret;
904 u8 buffer[4];
905 u32 count;
906
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700907 ret = applesmc_read_key(KEY_COUNT_KEY, buffer, 4);
908 count = ((u32)buffer[0]<<24) + ((u32)buffer[1]<<16) +
909 ((u32)buffer[2]<<8) + buffer[3];
910
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700911 if (ret)
912 return ret;
913 else
914 return snprintf(sysfsbuf, PAGE_SIZE, "%d\n", count);
915}
916
917static ssize_t applesmc_key_at_index_read_show(struct device *dev,
918 struct device_attribute *attr, char *sysfsbuf)
919{
Henrik Rydberg58745832010-11-10 10:58:03 +0000920 const struct applesmc_entry *entry;
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700921 int ret;
922
Henrik Rydberg58745832010-11-10 10:58:03 +0000923 entry = applesmc_get_entry_by_index(key_at_index);
924 if (IS_ERR(entry))
925 return PTR_ERR(entry);
926 ret = applesmc_read_entry(entry, sysfsbuf, entry->len);
927 if (ret)
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700928 return ret;
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700929
Henrik Rydberg58745832010-11-10 10:58:03 +0000930 return entry->len;
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700931}
932
933static ssize_t applesmc_key_at_index_data_length_show(struct device *dev,
934 struct device_attribute *attr, char *sysfsbuf)
935{
Henrik Rydberg58745832010-11-10 10:58:03 +0000936 const struct applesmc_entry *entry;
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700937
Henrik Rydberg58745832010-11-10 10:58:03 +0000938 entry = applesmc_get_entry_by_index(key_at_index);
939 if (IS_ERR(entry))
940 return PTR_ERR(entry);
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700941
Henrik Rydberg58745832010-11-10 10:58:03 +0000942 return snprintf(sysfsbuf, PAGE_SIZE, "%d\n", entry->len);
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700943}
944
945static ssize_t applesmc_key_at_index_type_show(struct device *dev,
946 struct device_attribute *attr, char *sysfsbuf)
947{
Henrik Rydberg58745832010-11-10 10:58:03 +0000948 const struct applesmc_entry *entry;
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700949
Henrik Rydberg58745832010-11-10 10:58:03 +0000950 entry = applesmc_get_entry_by_index(key_at_index);
951 if (IS_ERR(entry))
952 return PTR_ERR(entry);
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700953
Henrik Rydberg58745832010-11-10 10:58:03 +0000954 return snprintf(sysfsbuf, PAGE_SIZE, "%s\n", entry->type);
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700955}
956
957static ssize_t applesmc_key_at_index_name_show(struct device *dev,
958 struct device_attribute *attr, char *sysfsbuf)
959{
Henrik Rydberg58745832010-11-10 10:58:03 +0000960 const struct applesmc_entry *entry;
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700961
Henrik Rydberg58745832010-11-10 10:58:03 +0000962 entry = applesmc_get_entry_by_index(key_at_index);
963 if (IS_ERR(entry))
964 return PTR_ERR(entry);
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700965
Henrik Rydberg58745832010-11-10 10:58:03 +0000966 return snprintf(sysfsbuf, PAGE_SIZE, "%s\n", entry->key);
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700967}
968
969static ssize_t applesmc_key_at_index_show(struct device *dev,
970 struct device_attribute *attr, char *sysfsbuf)
971{
972 return snprintf(sysfsbuf, PAGE_SIZE, "%d\n", key_at_index);
973}
974
975static ssize_t applesmc_key_at_index_store(struct device *dev,
976 struct device_attribute *attr, const char *sysfsbuf, size_t count)
977{
Henrik Rydberg58745832010-11-10 10:58:03 +0000978 unsigned long newkey;
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700979
Henrik Rydberg58745832010-11-10 10:58:03 +0000980 if (strict_strtoul(sysfsbuf, 10, &newkey) < 0
981 || newkey >= smcreg.key_count)
982 return -EINVAL;
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700983
Henrik Rydberg58745832010-11-10 10:58:03 +0000984 key_at_index = newkey;
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700985 return count;
986}
987
988static struct led_classdev applesmc_backlight = {
Richard Purdie6c152be2007-10-31 15:00:07 +0100989 .name = "smc::kbd_backlight",
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700990 .default_trigger = "nand-disk",
991 .brightness_set = applesmc_brightness_set,
992};
993
Henrik Rydberg0b0b5df2010-11-09 15:15:09 +0000994static struct applesmc_node_group info_group[] = {
995 { "name", applesmc_name_show },
996 { "key_count", applesmc_key_count_show },
997 { "key_at_index", applesmc_key_at_index_show, applesmc_key_at_index_store },
998 { "key_at_index_name", applesmc_key_at_index_name_show },
999 { "key_at_index_type", applesmc_key_at_index_type_show },
1000 { "key_at_index_data_length", applesmc_key_at_index_data_length_show },
1001 { "key_at_index_data", applesmc_key_at_index_read_show },
1002 { }
Nicolas Boichat6f2fad72007-05-08 00:24:52 -07001003};
1004
Henrik Rydberg0b0b5df2010-11-09 15:15:09 +00001005static struct applesmc_node_group accelerometer_group[] = {
1006 { "position", applesmc_position_show },
1007 { "calibrate", applesmc_calibrate_show, applesmc_calibrate_store },
1008 { }
Nicolas Boichat6f2fad72007-05-08 00:24:52 -07001009};
1010
Henrik Rydberg0b0b5df2010-11-09 15:15:09 +00001011static struct applesmc_node_group light_sensor_group[] = {
1012 { "light", applesmc_light_show },
1013 { }
1014};
Nicolas Boichat6f2fad72007-05-08 00:24:52 -07001015
Henrik Rydberg3eba2bf2010-11-09 15:15:08 +00001016static struct applesmc_node_group fan_group[] = {
1017 { "fan%d_label", applesmc_show_fan_position },
1018 { "fan%d_input", applesmc_show_fan_speed, NULL, 0 },
1019 { "fan%d_min", applesmc_show_fan_speed, applesmc_store_fan_speed, 1 },
1020 { "fan%d_max", applesmc_show_fan_speed, NULL, 2 },
1021 { "fan%d_safe", applesmc_show_fan_speed, NULL, 3 },
1022 { "fan%d_output", applesmc_show_fan_speed, applesmc_store_fan_speed, 4 },
1023 { "fan%d_manual", applesmc_show_fan_manual, applesmc_store_fan_manual },
1024 { }
Nicolas Boichat6f2fad72007-05-08 00:24:52 -07001025};
1026
Henrik Rydberg9792dad2010-11-10 10:58:04 +00001027static struct applesmc_node_group temp_group[] = {
1028 { "temp%d_label", applesmc_show_sensor_label },
1029 { "temp%d_input", applesmc_show_temperature },
1030 { }
Alex Murrayfa5575c2010-05-27 19:58:54 +02001031};
1032
Nicolas Boichat6f2fad72007-05-08 00:24:52 -07001033/* Module stuff */
1034
1035/*
Henrik Rydberg9792dad2010-11-10 10:58:04 +00001036 * applesmc_destroy_nodes - remove files and free associated memory
1037 */
1038static void applesmc_destroy_nodes(struct applesmc_node_group *groups)
1039{
1040 struct applesmc_node_group *grp;
1041 struct applesmc_dev_attr *node;
1042
1043 for (grp = groups; grp->nodes; grp++) {
1044 for (node = grp->nodes; node->sda.dev_attr.attr.name; node++)
1045 sysfs_remove_file(&pdev->dev.kobj,
1046 &node->sda.dev_attr.attr);
1047 kfree(grp->nodes);
1048 grp->nodes = NULL;
1049 }
1050}
1051
1052/*
1053 * applesmc_create_nodes - create a two-dimensional group of sysfs files
1054 */
1055static int applesmc_create_nodes(struct applesmc_node_group *groups, int num)
1056{
1057 struct applesmc_node_group *grp;
1058 struct applesmc_dev_attr *node;
1059 struct attribute *attr;
1060 int ret, i;
1061
1062 for (grp = groups; grp->format; grp++) {
1063 grp->nodes = kcalloc(num + 1, sizeof(*node), GFP_KERNEL);
1064 if (!grp->nodes) {
1065 ret = -ENOMEM;
1066 goto out;
1067 }
1068 for (i = 0; i < num; i++) {
1069 node = &grp->nodes[i];
1070 sprintf(node->name, grp->format, i + 1);
Henrik Rydberg3eba2bf2010-11-09 15:15:08 +00001071 node->sda.index = (grp->option << 16) | (i & 0xffff);
Henrik Rydberg9792dad2010-11-10 10:58:04 +00001072 node->sda.dev_attr.show = grp->show;
1073 node->sda.dev_attr.store = grp->store;
1074 attr = &node->sda.dev_attr.attr;
Henrik Rydberg9d1f8a402011-01-22 20:55:39 +01001075 sysfs_attr_init(attr);
Henrik Rydberg9792dad2010-11-10 10:58:04 +00001076 attr->name = node->name;
1077 attr->mode = S_IRUGO | (grp->store ? S_IWUSR : 0);
1078 ret = sysfs_create_file(&pdev->dev.kobj, attr);
1079 if (ret) {
1080 attr->name = NULL;
1081 goto out;
1082 }
1083 }
1084 }
1085
1086 return 0;
1087out:
1088 applesmc_destroy_nodes(groups);
1089 return ret;
1090}
1091
Nicolas Boichat6f2fad72007-05-08 00:24:52 -07001092/* Create accelerometer ressources */
1093static int applesmc_create_accelerometer(void)
1094{
Dmitry Torokhovd5cf2b92007-09-26 00:01:35 -04001095 struct input_dev *idev;
Nicolas Boichat6f2fad72007-05-08 00:24:52 -07001096 int ret;
1097
Henrik Rydberg0b0b5df2010-11-09 15:15:09 +00001098 if (!smcreg.has_accelerometer)
1099 return 0;
1100
1101 ret = applesmc_create_nodes(accelerometer_group, 1);
Nicolas Boichat6f2fad72007-05-08 00:24:52 -07001102 if (ret)
1103 goto out;
1104
Dmitry Torokhovd5cf2b92007-09-26 00:01:35 -04001105 applesmc_idev = input_allocate_polled_device();
Nicolas Boichat6f2fad72007-05-08 00:24:52 -07001106 if (!applesmc_idev) {
1107 ret = -ENOMEM;
1108 goto out_sysfs;
1109 }
1110
Dmitry Torokhovd5cf2b92007-09-26 00:01:35 -04001111 applesmc_idev->poll = applesmc_idev_poll;
1112 applesmc_idev->poll_interval = APPLESMC_POLL_INTERVAL;
1113
Nicolas Boichat6f2fad72007-05-08 00:24:52 -07001114 /* initial calibrate for the input device */
1115 applesmc_calibrate();
1116
Dmitry Torokhovd5cf2b92007-09-26 00:01:35 -04001117 /* initialize the input device */
1118 idev = applesmc_idev->input;
1119 idev->name = "applesmc";
1120 idev->id.bustype = BUS_HOST;
1121 idev->dev.parent = &pdev->dev;
Jiri Slaby7b19ada2007-10-18 23:40:32 -07001122 idev->evbit[0] = BIT_MASK(EV_ABS);
Dmitry Torokhovd5cf2b92007-09-26 00:01:35 -04001123 input_set_abs_params(idev, ABS_X,
Nicolas Boichat6f2fad72007-05-08 00:24:52 -07001124 -256, 256, APPLESMC_INPUT_FUZZ, APPLESMC_INPUT_FLAT);
Dmitry Torokhovd5cf2b92007-09-26 00:01:35 -04001125 input_set_abs_params(idev, ABS_Y,
Nicolas Boichat6f2fad72007-05-08 00:24:52 -07001126 -256, 256, APPLESMC_INPUT_FUZZ, APPLESMC_INPUT_FLAT);
1127
Dmitry Torokhovd5cf2b92007-09-26 00:01:35 -04001128 ret = input_register_polled_device(applesmc_idev);
Nicolas Boichat6f2fad72007-05-08 00:24:52 -07001129 if (ret)
1130 goto out_idev;
1131
Nicolas Boichat6f2fad72007-05-08 00:24:52 -07001132 return 0;
1133
1134out_idev:
Dmitry Torokhovd5cf2b92007-09-26 00:01:35 -04001135 input_free_polled_device(applesmc_idev);
Nicolas Boichat6f2fad72007-05-08 00:24:52 -07001136
1137out_sysfs:
Henrik Rydberg0b0b5df2010-11-09 15:15:09 +00001138 applesmc_destroy_nodes(accelerometer_group);
Nicolas Boichat6f2fad72007-05-08 00:24:52 -07001139
1140out:
Joe Perches1ee7c712010-11-09 15:15:03 +00001141 pr_warn("driver init failed (ret=%d)!\n", ret);
Nicolas Boichat6f2fad72007-05-08 00:24:52 -07001142 return ret;
1143}
1144
1145/* Release all ressources used by the accelerometer */
1146static void applesmc_release_accelerometer(void)
1147{
Henrik Rydberg0b0b5df2010-11-09 15:15:09 +00001148 if (!smcreg.has_accelerometer)
1149 return;
Dmitry Torokhovd5cf2b92007-09-26 00:01:35 -04001150 input_unregister_polled_device(applesmc_idev);
1151 input_free_polled_device(applesmc_idev);
Henrik Rydberg0b0b5df2010-11-09 15:15:09 +00001152 applesmc_destroy_nodes(accelerometer_group);
Nicolas Boichat6f2fad72007-05-08 00:24:52 -07001153}
Henrik Rydberg0b0b5df2010-11-09 15:15:09 +00001154
1155static int applesmc_create_light_sensor(void)
1156{
1157 if (!smcreg.num_light_sensors)
1158 return 0;
1159 return applesmc_create_nodes(light_sensor_group, 1);
1160}
1161
1162static void applesmc_release_light_sensor(void)
1163{
1164 if (!smcreg.num_light_sensors)
1165 return;
1166 applesmc_destroy_nodes(light_sensor_group);
1167}
1168
1169static int applesmc_create_key_backlight(void)
1170{
1171 if (!smcreg.has_key_backlight)
1172 return 0;
1173 applesmc_led_wq = create_singlethread_workqueue("applesmc-led");
1174 if (!applesmc_led_wq)
1175 return -ENOMEM;
1176 return led_classdev_register(&pdev->dev, &applesmc_backlight);
1177}
1178
1179static void applesmc_release_key_backlight(void)
1180{
1181 if (!smcreg.has_key_backlight)
1182 return;
1183 led_classdev_unregister(&applesmc_backlight);
1184 destroy_workqueue(applesmc_led_wq);
1185}
1186
Henrik Rydberg40ef06f2010-11-10 10:58:05 +00001187static int applesmc_dmi_match(const struct dmi_system_id *id)
1188{
1189 return 1;
1190}
Nicolas Boichat6f2fad72007-05-08 00:24:52 -07001191
1192/* Note that DMI_MATCH(...,"MacBook") will match "MacBookPro1,1".
1193 * So we need to put "Apple MacBook Pro" before "Apple MacBook". */
1194static __initdata struct dmi_system_id applesmc_whitelist[] = {
Henrik Rydbergf5274c92008-10-18 20:27:40 -07001195 { applesmc_dmi_match, "Apple MacBook Air", {
1196 DMI_MATCH(DMI_BOARD_VENDOR, "Apple"),
1197 DMI_MATCH(DMI_PRODUCT_NAME, "MacBookAir") },
Henrik Rydberg40ef06f2010-11-10 10:58:05 +00001198 },
Nicolas Boichat6f2fad72007-05-08 00:24:52 -07001199 { applesmc_dmi_match, "Apple MacBook Pro", {
Guenter Roeck2bfe8142010-11-10 10:42:21 -08001200 DMI_MATCH(DMI_BOARD_VENDOR, "Apple"),
1201 DMI_MATCH(DMI_PRODUCT_NAME, "MacBookPro") },
Henrik Rydberg40ef06f2010-11-10 10:58:05 +00001202 },
Riki Oktariantocd19ba12008-02-04 23:41:58 -08001203 { applesmc_dmi_match, "Apple MacBook", {
Guenter Roeck2bfe8142010-11-10 10:42:21 -08001204 DMI_MATCH(DMI_BOARD_VENDOR, "Apple"),
1205 DMI_MATCH(DMI_PRODUCT_NAME, "MacBook") },
Henrik Rydberg40ef06f2010-11-10 10:58:05 +00001206 },
Nicolas Boichat6f2fad72007-05-08 00:24:52 -07001207 { applesmc_dmi_match, "Apple Macmini", {
Guenter Roeck2bfe8142010-11-10 10:42:21 -08001208 DMI_MATCH(DMI_BOARD_VENDOR, "Apple"),
1209 DMI_MATCH(DMI_PRODUCT_NAME, "Macmini") },
Henrik Rydberg40ef06f2010-11-10 10:58:05 +00001210 },
Henrik Rydberg45a3a362008-11-19 15:36:42 -08001211 { applesmc_dmi_match, "Apple MacPro", {
1212 DMI_MATCH(DMI_BOARD_VENDOR, "Apple"),
1213 DMI_MATCH(DMI_PRODUCT_NAME, "MacPro") },
Henrik Rydberg40ef06f2010-11-10 10:58:05 +00001214 },
Roberto De Ioris9f86f282008-08-15 00:40:30 -07001215 { applesmc_dmi_match, "Apple iMac", {
Guenter Roeck2bfe8142010-11-10 10:42:21 -08001216 DMI_MATCH(DMI_BOARD_VENDOR, "Apple"),
1217 DMI_MATCH(DMI_PRODUCT_NAME, "iMac") },
Henrik Rydberg40ef06f2010-11-10 10:58:05 +00001218 },
Nicolas Boichat6f2fad72007-05-08 00:24:52 -07001219 { .ident = NULL }
1220};
1221
1222static int __init applesmc_init(void)
1223{
1224 int ret;
Nicolas Boichat6f2fad72007-05-08 00:24:52 -07001225
Nicolas Boichat6f2fad72007-05-08 00:24:52 -07001226 if (!dmi_check_system(applesmc_whitelist)) {
Joe Perches1ee7c712010-11-09 15:15:03 +00001227 pr_warn("supported laptop not found!\n");
Nicolas Boichat6f2fad72007-05-08 00:24:52 -07001228 ret = -ENODEV;
1229 goto out;
1230 }
1231
1232 if (!request_region(APPLESMC_DATA_PORT, APPLESMC_NR_PORTS,
1233 "applesmc")) {
1234 ret = -ENXIO;
1235 goto out;
1236 }
1237
1238 ret = platform_driver_register(&applesmc_driver);
1239 if (ret)
1240 goto out_region;
1241
Jean Delvareddfbf2a2007-05-08 20:27:04 -07001242 pdev = platform_device_register_simple("applesmc", APPLESMC_DATA_PORT,
1243 NULL, 0);
Nicolas Boichat6f2fad72007-05-08 00:24:52 -07001244 if (IS_ERR(pdev)) {
1245 ret = PTR_ERR(pdev);
1246 goto out_driver;
1247 }
1248
Henrik Rydberg58745832010-11-10 10:58:03 +00001249 /* create register cache */
1250 ret = applesmc_init_smcreg();
Nicolas Boichat6996abf2007-05-27 22:17:43 +02001251 if (ret)
1252 goto out_device;
Nicolas Boichatfa744192007-05-23 13:58:13 -07001253
Henrik Rydberg0b0b5df2010-11-09 15:15:09 +00001254 ret = applesmc_create_nodes(info_group, 1);
Henrik Rydberg58745832010-11-10 10:58:03 +00001255 if (ret)
1256 goto out_smcreg;
1257
Henrik Rydberg3eba2bf2010-11-09 15:15:08 +00001258 ret = applesmc_create_nodes(fan_group, smcreg.fan_count);
1259 if (ret)
1260 goto out_info;
Nicolas Boichat6f2fad72007-05-08 00:24:52 -07001261
Henrik Rydberg9792dad2010-11-10 10:58:04 +00001262 ret = applesmc_create_nodes(temp_group, smcreg.temp_count);
1263 if (ret)
1264 goto out_fans;
Nicolas Boichat6f2fad72007-05-08 00:24:52 -07001265
Henrik Rydberg0b0b5df2010-11-09 15:15:09 +00001266 ret = applesmc_create_accelerometer();
1267 if (ret)
1268 goto out_temperature;
Nicolas Boichat6f2fad72007-05-08 00:24:52 -07001269
Henrik Rydberg0b0b5df2010-11-09 15:15:09 +00001270 ret = applesmc_create_light_sensor();
1271 if (ret)
1272 goto out_accelerometer;
Nicolas Boichat6f2fad72007-05-08 00:24:52 -07001273
Henrik Rydberg0b0b5df2010-11-09 15:15:09 +00001274 ret = applesmc_create_key_backlight();
1275 if (ret)
1276 goto out_light_sysfs;
Nicolas Boichat6f2fad72007-05-08 00:24:52 -07001277
Tony Jones1beeffe2007-08-20 13:46:20 -07001278 hwmon_dev = hwmon_device_register(&pdev->dev);
1279 if (IS_ERR(hwmon_dev)) {
1280 ret = PTR_ERR(hwmon_dev);
Nicolas Boichat6f2fad72007-05-08 00:24:52 -07001281 goto out_light_ledclass;
1282 }
1283
Nicolas Boichat6f2fad72007-05-08 00:24:52 -07001284 return 0;
1285
1286out_light_ledclass:
Henrik Rydberg0b0b5df2010-11-09 15:15:09 +00001287 applesmc_release_key_backlight();
Nicolas Boichat6f2fad72007-05-08 00:24:52 -07001288out_light_sysfs:
Henrik Rydberg0b0b5df2010-11-09 15:15:09 +00001289 applesmc_release_light_sensor();
Nicolas Boichat6f2fad72007-05-08 00:24:52 -07001290out_accelerometer:
Henrik Rydberg0b0b5df2010-11-09 15:15:09 +00001291 applesmc_release_accelerometer();
Nicolas Boichat6f2fad72007-05-08 00:24:52 -07001292out_temperature:
Henrik Rydberg9792dad2010-11-10 10:58:04 +00001293 applesmc_destroy_nodes(temp_group);
Henrik Rydberg0559a532010-05-11 09:17:47 +02001294out_fans:
Henrik Rydberg3eba2bf2010-11-09 15:15:08 +00001295 applesmc_destroy_nodes(fan_group);
1296out_info:
Henrik Rydberg0b0b5df2010-11-09 15:15:09 +00001297 applesmc_destroy_nodes(info_group);
Henrik Rydberg58745832010-11-10 10:58:03 +00001298out_smcreg:
1299 applesmc_destroy_smcreg();
Nicolas Boichat6f2fad72007-05-08 00:24:52 -07001300out_device:
1301 platform_device_unregister(pdev);
1302out_driver:
1303 platform_driver_unregister(&applesmc_driver);
1304out_region:
1305 release_region(APPLESMC_DATA_PORT, APPLESMC_NR_PORTS);
1306out:
Joe Perches1ee7c712010-11-09 15:15:03 +00001307 pr_warn("driver init failed (ret=%d)!\n", ret);
Nicolas Boichat6f2fad72007-05-08 00:24:52 -07001308 return ret;
1309}
1310
1311static void __exit applesmc_exit(void)
1312{
Tony Jones1beeffe2007-08-20 13:46:20 -07001313 hwmon_device_unregister(hwmon_dev);
Henrik Rydberg0b0b5df2010-11-09 15:15:09 +00001314 applesmc_release_key_backlight();
1315 applesmc_release_light_sensor();
1316 applesmc_release_accelerometer();
Henrik Rydberg9792dad2010-11-10 10:58:04 +00001317 applesmc_destroy_nodes(temp_group);
Henrik Rydberg3eba2bf2010-11-09 15:15:08 +00001318 applesmc_destroy_nodes(fan_group);
Henrik Rydberg0b0b5df2010-11-09 15:15:09 +00001319 applesmc_destroy_nodes(info_group);
Henrik Rydberg58745832010-11-10 10:58:03 +00001320 applesmc_destroy_smcreg();
Nicolas Boichat6f2fad72007-05-08 00:24:52 -07001321 platform_device_unregister(pdev);
1322 platform_driver_unregister(&applesmc_driver);
1323 release_region(APPLESMC_DATA_PORT, APPLESMC_NR_PORTS);
Nicolas Boichat6f2fad72007-05-08 00:24:52 -07001324}
1325
1326module_init(applesmc_init);
1327module_exit(applesmc_exit);
1328
1329MODULE_AUTHOR("Nicolas Boichat");
1330MODULE_DESCRIPTION("Apple SMC");
1331MODULE_LICENSE("GPL v2");
Henrik Rydbergdc924ef2008-12-01 13:13:49 -08001332MODULE_DEVICE_TABLE(dmi, applesmc_whitelist);