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1 | /* | |
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> | |
7 | * Copyright (C) 2010 Henrik Rydberg <rydberg@euromail.se> | |
8 | * | |
9 | * Based on hdaps.c driver: | |
10 | * Copyright (C) 2005 Robert Love <rml@novell.com> | |
11 | * Copyright (C) 2005 Jesper Juhl <jj@chaosbits.net> | |
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 | ||
30 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt | |
31 | ||
32 | #include <linux/delay.h> | |
33 | #include <linux/platform_device.h> | |
34 | #include <linux/input-polldev.h> | |
35 | #include <linux/kernel.h> | |
36 | #include <linux/slab.h> | |
37 | #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> | |
42 | #include <linux/io.h> | |
43 | #include <linux/leds.h> | |
44 | #include <linux/hwmon.h> | |
45 | #include <linux/workqueue.h> | |
46 | #include <linux/err.h> | |
47 | ||
48 | /* data port used by Apple SMC */ | |
49 | #define APPLESMC_DATA_PORT 0x300 | |
50 | /* command/status port used by Apple SMC */ | |
51 | #define APPLESMC_CMD_PORT 0x304 | |
52 | ||
53 | #define APPLESMC_NR_PORTS 32 /* 0x300-0x31f */ | |
54 | ||
55 | #define APPLESMC_MAX_DATA_LENGTH 32 | |
56 | ||
57 | /* wait up to 128 ms for a status change. */ | |
58 | #define APPLESMC_MIN_WAIT 0x0010 | |
59 | #define APPLESMC_RETRY_WAIT 0x0100 | |
60 | #define APPLESMC_MAX_WAIT 0x20000 | |
61 | ||
62 | #define APPLESMC_READ_CMD 0x10 | |
63 | #define APPLESMC_WRITE_CMD 0x11 | |
64 | #define APPLESMC_GET_KEY_BY_INDEX_CMD 0x12 | |
65 | #define APPLESMC_GET_KEY_TYPE_CMD 0x13 | |
66 | ||
67 | #define KEY_COUNT_KEY "#KEY" /* r-o ui32 */ | |
68 | ||
69 | #define LIGHT_SENSOR_LEFT_KEY "ALV0" /* r-o {alv (6-10 bytes) */ | |
70 | #define LIGHT_SENSOR_RIGHT_KEY "ALV1" /* r-o {alv (6-10 bytes) */ | |
71 | #define BACKLIGHT_KEY "LKSB" /* w-o {lkb (2 bytes) */ | |
72 | ||
73 | #define CLAMSHELL_KEY "MSLD" /* r-o ui8 (unused) */ | |
74 | ||
75 | #define MOTION_SENSOR_X_KEY "MO_X" /* r-o sp78 (2 bytes) */ | |
76 | #define MOTION_SENSOR_Y_KEY "MO_Y" /* r-o sp78 (2 bytes) */ | |
77 | #define MOTION_SENSOR_Z_KEY "MO_Z" /* r-o sp78 (2 bytes) */ | |
78 | #define MOTION_SENSOR_KEY "MOCN" /* r/w ui16 */ | |
79 | ||
80 | #define FANS_COUNT "FNum" /* r-o ui8 */ | |
81 | #define FANS_MANUAL "FS! " /* r-w ui16 */ | |
82 | #define FAN_ID_FMT "F%dID" /* r-o char[16] */ | |
83 | ||
84 | #define TEMP_SENSOR_TYPE "sp78" | |
85 | ||
86 | /* List of keys used to read/write fan speeds */ | |
87 | static const char *const fan_speed_fmt[] = { | |
88 | "F%dAc", /* actual speed */ | |
89 | "F%dMn", /* minimum speed (rw) */ | |
90 | "F%dMx", /* maximum speed */ | |
91 | "F%dSf", /* safe speed - not all models */ | |
92 | "F%dTg", /* target speed (manual: rw) */ | |
93 | }; | |
94 | ||
95 | #define INIT_TIMEOUT_MSECS 5000 /* wait up to 5s for device init ... */ | |
96 | #define INIT_WAIT_MSECS 50 /* ... in 50ms increments */ | |
97 | ||
98 | #define APPLESMC_POLL_INTERVAL 50 /* msecs */ | |
99 | #define APPLESMC_INPUT_FUZZ 4 /* input event threshold */ | |
100 | #define APPLESMC_INPUT_FLAT 4 | |
101 | ||
102 | #define to_index(attr) (to_sensor_dev_attr(attr)->index & 0xffff) | |
103 | #define to_option(attr) (to_sensor_dev_attr(attr)->index >> 16) | |
104 | ||
105 | /* Dynamic device node attributes */ | |
106 | struct applesmc_dev_attr { | |
107 | struct sensor_device_attribute sda; /* hwmon attributes */ | |
108 | char name[32]; /* room for node file name */ | |
109 | }; | |
110 | ||
111 | /* Dynamic device node group */ | |
112 | struct applesmc_node_group { | |
113 | char *format; /* format string */ | |
114 | void *show; /* show function */ | |
115 | void *store; /* store function */ | |
116 | int option; /* function argument */ | |
117 | struct applesmc_dev_attr *nodes; /* dynamic node array */ | |
118 | }; | |
119 | ||
120 | /* AppleSMC entry - cached register information */ | |
121 | struct applesmc_entry { | |
122 | char key[5]; /* four-letter key code */ | |
123 | u8 valid; /* set when entry is successfully read once */ | |
124 | u8 len; /* bounded by APPLESMC_MAX_DATA_LENGTH */ | |
125 | char type[5]; /* four-letter type code */ | |
126 | u8 flags; /* 0x10: func; 0x40: write; 0x80: read */ | |
127 | }; | |
128 | ||
129 | /* Register lookup and registers common to all SMCs */ | |
130 | static struct applesmc_registers { | |
131 | struct mutex mutex; /* register read/write mutex */ | |
132 | unsigned int key_count; /* number of SMC registers */ | |
133 | unsigned int fan_count; /* number of fans */ | |
134 | unsigned int temp_count; /* number of temperature registers */ | |
135 | unsigned int temp_begin; /* temperature lower index bound */ | |
136 | unsigned int temp_end; /* temperature upper index bound */ | |
137 | unsigned int index_count; /* size of temperature index array */ | |
138 | int num_light_sensors; /* number of light sensors */ | |
139 | bool has_accelerometer; /* has motion sensor */ | |
140 | bool has_key_backlight; /* has keyboard backlight */ | |
141 | bool init_complete; /* true when fully initialized */ | |
142 | struct applesmc_entry *cache; /* cached key entries */ | |
143 | const char **index; /* temperature key index */ | |
144 | } smcreg = { | |
145 | .mutex = __MUTEX_INITIALIZER(smcreg.mutex), | |
146 | }; | |
147 | ||
148 | static const int debug; | |
149 | static struct platform_device *pdev; | |
150 | static s16 rest_x; | |
151 | static s16 rest_y; | |
152 | static u8 backlight_state[2]; | |
153 | ||
154 | static struct device *hwmon_dev; | |
155 | static struct input_polled_dev *applesmc_idev; | |
156 | ||
157 | /* | |
158 | * Last index written to key_at_index sysfs file, and value to use for all other | |
159 | * key_at_index_* sysfs files. | |
160 | */ | |
161 | static unsigned int key_at_index; | |
162 | ||
163 | static struct workqueue_struct *applesmc_led_wq; | |
164 | ||
165 | /* | |
166 | * wait_read - Wait for a byte to appear on SMC port. Callers must | |
167 | * hold applesmc_lock. | |
168 | */ | |
169 | static int wait_read(void) | |
170 | { | |
171 | u8 status; | |
172 | int us; | |
173 | for (us = APPLESMC_MIN_WAIT; us < APPLESMC_MAX_WAIT; us <<= 1) { | |
174 | udelay(us); | |
175 | status = inb(APPLESMC_CMD_PORT); | |
176 | /* read: wait for smc to settle */ | |
177 | if (status & 0x01) | |
178 | return 0; | |
179 | } | |
180 | ||
181 | pr_warn("wait_read() fail: 0x%02x\n", status); | |
182 | return -EIO; | |
183 | } | |
184 | ||
185 | /* | |
186 | * send_byte - Write to SMC port, retrying when necessary. Callers | |
187 | * must hold applesmc_lock. | |
188 | */ | |
189 | static int send_byte(u8 cmd, u16 port) | |
190 | { | |
191 | u8 status; | |
192 | int us; | |
193 | ||
194 | outb(cmd, port); | |
195 | for (us = APPLESMC_MIN_WAIT; us < APPLESMC_MAX_WAIT; us <<= 1) { | |
196 | udelay(us); | |
197 | status = inb(APPLESMC_CMD_PORT); | |
198 | /* write: wait for smc to settle */ | |
199 | if (status & 0x02) | |
200 | continue; | |
201 | /* ready: cmd accepted, return */ | |
202 | if (status & 0x04) | |
203 | return 0; | |
204 | /* timeout: give up */ | |
205 | if (us << 1 == APPLESMC_MAX_WAIT) | |
206 | break; | |
207 | /* busy: long wait and resend */ | |
208 | udelay(APPLESMC_RETRY_WAIT); | |
209 | outb(cmd, port); | |
210 | } | |
211 | ||
212 | pr_warn("send_byte(0x%02x, 0x%04x) fail: 0x%02x\n", cmd, port, status); | |
213 | return -EIO; | |
214 | } | |
215 | ||
216 | static int send_command(u8 cmd) | |
217 | { | |
218 | return send_byte(cmd, APPLESMC_CMD_PORT); | |
219 | } | |
220 | ||
221 | static int send_argument(const char *key) | |
222 | { | |
223 | int i; | |
224 | ||
225 | for (i = 0; i < 4; i++) | |
226 | if (send_byte(key[i], APPLESMC_DATA_PORT)) | |
227 | return -EIO; | |
228 | return 0; | |
229 | } | |
230 | ||
231 | static int read_smc(u8 cmd, const char *key, u8 *buffer, u8 len) | |
232 | { | |
233 | u8 status, data = 0; | |
234 | int i; | |
235 | ||
236 | if (send_command(cmd) || send_argument(key)) { | |
237 | pr_warn("%.4s: read arg fail\n", key); | |
238 | return -EIO; | |
239 | } | |
240 | ||
241 | /* This has no effect on newer (2012) SMCs */ | |
242 | if (send_byte(len, APPLESMC_DATA_PORT)) { | |
243 | pr_warn("%.4s: read len fail\n", key); | |
244 | return -EIO; | |
245 | } | |
246 | ||
247 | for (i = 0; i < len; i++) { | |
248 | if (wait_read()) { | |
249 | pr_warn("%.4s: read data[%d] fail\n", key, i); | |
250 | return -EIO; | |
251 | } | |
252 | buffer[i] = inb(APPLESMC_DATA_PORT); | |
253 | } | |
254 | ||
255 | /* Read the data port until bit0 is cleared */ | |
256 | for (i = 0; i < 16; i++) { | |
257 | udelay(APPLESMC_MIN_WAIT); | |
258 | status = inb(APPLESMC_CMD_PORT); | |
259 | if (!(status & 0x01)) | |
260 | break; | |
261 | data = inb(APPLESMC_DATA_PORT); | |
262 | } | |
263 | if (i) | |
264 | pr_warn("flushed %d bytes, last value is: %d\n", i, data); | |
265 | ||
266 | return 0; | |
267 | } | |
268 | ||
269 | static int write_smc(u8 cmd, const char *key, const u8 *buffer, u8 len) | |
270 | { | |
271 | int i; | |
272 | ||
273 | if (send_command(cmd) || send_argument(key)) { | |
274 | pr_warn("%s: write arg fail\n", key); | |
275 | return -EIO; | |
276 | } | |
277 | ||
278 | if (send_byte(len, APPLESMC_DATA_PORT)) { | |
279 | pr_warn("%.4s: write len fail\n", key); | |
280 | return -EIO; | |
281 | } | |
282 | ||
283 | for (i = 0; i < len; i++) { | |
284 | if (send_byte(buffer[i], APPLESMC_DATA_PORT)) { | |
285 | pr_warn("%s: write data fail\n", key); | |
286 | return -EIO; | |
287 | } | |
288 | } | |
289 | ||
290 | return 0; | |
291 | } | |
292 | ||
293 | static int read_register_count(unsigned int *count) | |
294 | { | |
295 | __be32 be; | |
296 | int ret; | |
297 | ||
298 | ret = read_smc(APPLESMC_READ_CMD, KEY_COUNT_KEY, (u8 *)&be, 4); | |
299 | if (ret) | |
300 | return ret; | |
301 | ||
302 | *count = be32_to_cpu(be); | |
303 | return 0; | |
304 | } | |
305 | ||
306 | /* | |
307 | * Serialized I/O | |
308 | * | |
309 | * Returns zero on success or a negative error on failure. | |
310 | * All functions below are concurrency safe - callers should NOT hold lock. | |
311 | */ | |
312 | ||
313 | static int applesmc_read_entry(const struct applesmc_entry *entry, | |
314 | u8 *buf, u8 len) | |
315 | { | |
316 | int ret; | |
317 | ||
318 | if (entry->len != len) | |
319 | return -EINVAL; | |
320 | mutex_lock(&smcreg.mutex); | |
321 | ret = read_smc(APPLESMC_READ_CMD, entry->key, buf, len); | |
322 | mutex_unlock(&smcreg.mutex); | |
323 | ||
324 | return ret; | |
325 | } | |
326 | ||
327 | static int applesmc_write_entry(const struct applesmc_entry *entry, | |
328 | const u8 *buf, u8 len) | |
329 | { | |
330 | int ret; | |
331 | ||
332 | if (entry->len != len) | |
333 | return -EINVAL; | |
334 | mutex_lock(&smcreg.mutex); | |
335 | ret = write_smc(APPLESMC_WRITE_CMD, entry->key, buf, len); | |
336 | mutex_unlock(&smcreg.mutex); | |
337 | return ret; | |
338 | } | |
339 | ||
340 | static const struct applesmc_entry *applesmc_get_entry_by_index(int index) | |
341 | { | |
342 | struct applesmc_entry *cache = &smcreg.cache[index]; | |
343 | u8 key[4], info[6]; | |
344 | __be32 be; | |
345 | int ret = 0; | |
346 | ||
347 | if (cache->valid) | |
348 | return cache; | |
349 | ||
350 | mutex_lock(&smcreg.mutex); | |
351 | ||
352 | if (cache->valid) | |
353 | goto out; | |
354 | be = cpu_to_be32(index); | |
355 | ret = read_smc(APPLESMC_GET_KEY_BY_INDEX_CMD, (u8 *)&be, key, 4); | |
356 | if (ret) | |
357 | goto out; | |
358 | ret = read_smc(APPLESMC_GET_KEY_TYPE_CMD, key, info, 6); | |
359 | if (ret) | |
360 | goto out; | |
361 | ||
362 | memcpy(cache->key, key, 4); | |
363 | cache->len = info[0]; | |
364 | memcpy(cache->type, &info[1], 4); | |
365 | cache->flags = info[5]; | |
366 | cache->valid = 1; | |
367 | ||
368 | out: | |
369 | mutex_unlock(&smcreg.mutex); | |
370 | if (ret) | |
371 | return ERR_PTR(ret); | |
372 | return cache; | |
373 | } | |
374 | ||
375 | static int applesmc_get_lower_bound(unsigned int *lo, const char *key) | |
376 | { | |
377 | int begin = 0, end = smcreg.key_count; | |
378 | const struct applesmc_entry *entry; | |
379 | ||
380 | while (begin != end) { | |
381 | int middle = begin + (end - begin) / 2; | |
382 | entry = applesmc_get_entry_by_index(middle); | |
383 | if (IS_ERR(entry)) { | |
384 | *lo = 0; | |
385 | return PTR_ERR(entry); | |
386 | } | |
387 | if (strcmp(entry->key, key) < 0) | |
388 | begin = middle + 1; | |
389 | else | |
390 | end = middle; | |
391 | } | |
392 | ||
393 | *lo = begin; | |
394 | return 0; | |
395 | } | |
396 | ||
397 | static int applesmc_get_upper_bound(unsigned int *hi, const char *key) | |
398 | { | |
399 | int begin = 0, end = smcreg.key_count; | |
400 | const struct applesmc_entry *entry; | |
401 | ||
402 | while (begin != end) { | |
403 | int middle = begin + (end - begin) / 2; | |
404 | entry = applesmc_get_entry_by_index(middle); | |
405 | if (IS_ERR(entry)) { | |
406 | *hi = smcreg.key_count; | |
407 | return PTR_ERR(entry); | |
408 | } | |
409 | if (strcmp(key, entry->key) < 0) | |
410 | end = middle; | |
411 | else | |
412 | begin = middle + 1; | |
413 | } | |
414 | ||
415 | *hi = begin; | |
416 | return 0; | |
417 | } | |
418 | ||
419 | static const struct applesmc_entry *applesmc_get_entry_by_key(const char *key) | |
420 | { | |
421 | int begin, end; | |
422 | int ret; | |
423 | ||
424 | ret = applesmc_get_lower_bound(&begin, key); | |
425 | if (ret) | |
426 | return ERR_PTR(ret); | |
427 | ret = applesmc_get_upper_bound(&end, key); | |
428 | if (ret) | |
429 | return ERR_PTR(ret); | |
430 | if (end - begin != 1) | |
431 | return ERR_PTR(-EINVAL); | |
432 | ||
433 | return applesmc_get_entry_by_index(begin); | |
434 | } | |
435 | ||
436 | static int applesmc_read_key(const char *key, u8 *buffer, u8 len) | |
437 | { | |
438 | const struct applesmc_entry *entry; | |
439 | ||
440 | entry = applesmc_get_entry_by_key(key); | |
441 | if (IS_ERR(entry)) | |
442 | return PTR_ERR(entry); | |
443 | ||
444 | return applesmc_read_entry(entry, buffer, len); | |
445 | } | |
446 | ||
447 | static int applesmc_write_key(const char *key, const u8 *buffer, u8 len) | |
448 | { | |
449 | const struct applesmc_entry *entry; | |
450 | ||
451 | entry = applesmc_get_entry_by_key(key); | |
452 | if (IS_ERR(entry)) | |
453 | return PTR_ERR(entry); | |
454 | ||
455 | return applesmc_write_entry(entry, buffer, len); | |
456 | } | |
457 | ||
458 | static int applesmc_has_key(const char *key, bool *value) | |
459 | { | |
460 | const struct applesmc_entry *entry; | |
461 | ||
462 | entry = applesmc_get_entry_by_key(key); | |
463 | if (IS_ERR(entry) && PTR_ERR(entry) != -EINVAL) | |
464 | return PTR_ERR(entry); | |
465 | ||
466 | *value = !IS_ERR(entry); | |
467 | return 0; | |
468 | } | |
469 | ||
470 | /* | |
471 | * applesmc_read_s16 - Read 16-bit signed big endian register | |
472 | */ | |
473 | static int applesmc_read_s16(const char *key, s16 *value) | |
474 | { | |
475 | u8 buffer[2]; | |
476 | int ret; | |
477 | ||
478 | ret = applesmc_read_key(key, buffer, 2); | |
479 | if (ret) | |
480 | return ret; | |
481 | ||
482 | *value = ((s16)buffer[0] << 8) | buffer[1]; | |
483 | return 0; | |
484 | } | |
485 | ||
486 | /* | |
487 | * applesmc_device_init - initialize the accelerometer. Can sleep. | |
488 | */ | |
489 | static void applesmc_device_init(void) | |
490 | { | |
491 | int total; | |
492 | u8 buffer[2]; | |
493 | ||
494 | if (!smcreg.has_accelerometer) | |
495 | return; | |
496 | ||
497 | for (total = INIT_TIMEOUT_MSECS; total > 0; total -= INIT_WAIT_MSECS) { | |
498 | if (!applesmc_read_key(MOTION_SENSOR_KEY, buffer, 2) && | |
499 | (buffer[0] != 0x00 || buffer[1] != 0x00)) | |
500 | return; | |
501 | buffer[0] = 0xe0; | |
502 | buffer[1] = 0x00; | |
503 | applesmc_write_key(MOTION_SENSOR_KEY, buffer, 2); | |
504 | msleep(INIT_WAIT_MSECS); | |
505 | } | |
506 | ||
507 | pr_warn("failed to init the device\n"); | |
508 | } | |
509 | ||
510 | static int applesmc_init_index(struct applesmc_registers *s) | |
511 | { | |
512 | const struct applesmc_entry *entry; | |
513 | unsigned int i; | |
514 | ||
515 | if (s->index) | |
516 | return 0; | |
517 | ||
518 | s->index = kcalloc(s->temp_count, sizeof(s->index[0]), GFP_KERNEL); | |
519 | if (!s->index) | |
520 | return -ENOMEM; | |
521 | ||
522 | for (i = s->temp_begin; i < s->temp_end; i++) { | |
523 | entry = applesmc_get_entry_by_index(i); | |
524 | if (IS_ERR(entry)) | |
525 | continue; | |
526 | if (strcmp(entry->type, TEMP_SENSOR_TYPE)) | |
527 | continue; | |
528 | s->index[s->index_count++] = entry->key; | |
529 | } | |
530 | ||
531 | return 0; | |
532 | } | |
533 | ||
534 | /* | |
535 | * applesmc_init_smcreg_try - Try to initialize register cache. Idempotent. | |
536 | */ | |
537 | static int applesmc_init_smcreg_try(void) | |
538 | { | |
539 | struct applesmc_registers *s = &smcreg; | |
540 | bool left_light_sensor = 0, right_light_sensor = 0; | |
541 | unsigned int count; | |
542 | u8 tmp[1]; | |
543 | int ret; | |
544 | ||
545 | if (s->init_complete) | |
546 | return 0; | |
547 | ||
548 | ret = read_register_count(&count); | |
549 | if (ret) | |
550 | return ret; | |
551 | ||
552 | if (s->cache && s->key_count != count) { | |
553 | pr_warn("key count changed from %d to %d\n", | |
554 | s->key_count, count); | |
555 | kfree(s->cache); | |
556 | s->cache = NULL; | |
557 | } | |
558 | s->key_count = count; | |
559 | ||
560 | if (!s->cache) | |
561 | s->cache = kcalloc(s->key_count, sizeof(*s->cache), GFP_KERNEL); | |
562 | if (!s->cache) | |
563 | return -ENOMEM; | |
564 | ||
565 | ret = applesmc_read_key(FANS_COUNT, tmp, 1); | |
566 | if (ret) | |
567 | return ret; | |
568 | s->fan_count = tmp[0]; | |
569 | if (s->fan_count > 10) | |
570 | s->fan_count = 10; | |
571 | ||
572 | ret = applesmc_get_lower_bound(&s->temp_begin, "T"); | |
573 | if (ret) | |
574 | return ret; | |
575 | ret = applesmc_get_lower_bound(&s->temp_end, "U"); | |
576 | if (ret) | |
577 | return ret; | |
578 | s->temp_count = s->temp_end - s->temp_begin; | |
579 | ||
580 | ret = applesmc_init_index(s); | |
581 | if (ret) | |
582 | return ret; | |
583 | ||
584 | ret = applesmc_has_key(LIGHT_SENSOR_LEFT_KEY, &left_light_sensor); | |
585 | if (ret) | |
586 | return ret; | |
587 | ret = applesmc_has_key(LIGHT_SENSOR_RIGHT_KEY, &right_light_sensor); | |
588 | if (ret) | |
589 | return ret; | |
590 | ret = applesmc_has_key(MOTION_SENSOR_KEY, &s->has_accelerometer); | |
591 | if (ret) | |
592 | return ret; | |
593 | ret = applesmc_has_key(BACKLIGHT_KEY, &s->has_key_backlight); | |
594 | if (ret) | |
595 | return ret; | |
596 | ||
597 | s->num_light_sensors = left_light_sensor + right_light_sensor; | |
598 | s->init_complete = true; | |
599 | ||
600 | pr_info("key=%d fan=%d temp=%d index=%d acc=%d lux=%d kbd=%d\n", | |
601 | s->key_count, s->fan_count, s->temp_count, s->index_count, | |
602 | s->has_accelerometer, | |
603 | s->num_light_sensors, | |
604 | s->has_key_backlight); | |
605 | ||
606 | return 0; | |
607 | } | |
608 | ||
609 | static void applesmc_destroy_smcreg(void) | |
610 | { | |
611 | kfree(smcreg.index); | |
612 | smcreg.index = NULL; | |
613 | kfree(smcreg.cache); | |
614 | smcreg.cache = NULL; | |
615 | smcreg.init_complete = false; | |
616 | } | |
617 | ||
618 | /* | |
619 | * applesmc_init_smcreg - Initialize register cache. | |
620 | * | |
621 | * Retries until initialization is successful, or the operation times out. | |
622 | * | |
623 | */ | |
624 | static int applesmc_init_smcreg(void) | |
625 | { | |
626 | int ms, ret; | |
627 | ||
628 | for (ms = 0; ms < INIT_TIMEOUT_MSECS; ms += INIT_WAIT_MSECS) { | |
629 | ret = applesmc_init_smcreg_try(); | |
630 | if (!ret) { | |
631 | if (ms) | |
632 | pr_info("init_smcreg() took %d ms\n", ms); | |
633 | return 0; | |
634 | } | |
635 | msleep(INIT_WAIT_MSECS); | |
636 | } | |
637 | ||
638 | applesmc_destroy_smcreg(); | |
639 | ||
640 | return ret; | |
641 | } | |
642 | ||
643 | /* Device model stuff */ | |
644 | static int applesmc_probe(struct platform_device *dev) | |
645 | { | |
646 | int ret; | |
647 | ||
648 | ret = applesmc_init_smcreg(); | |
649 | if (ret) | |
650 | return ret; | |
651 | ||
652 | applesmc_device_init(); | |
653 | ||
654 | return 0; | |
655 | } | |
656 | ||
657 | /* Synchronize device with memorized backlight state */ | |
658 | static int applesmc_pm_resume(struct device *dev) | |
659 | { | |
660 | if (smcreg.has_key_backlight) | |
661 | applesmc_write_key(BACKLIGHT_KEY, backlight_state, 2); | |
662 | return 0; | |
663 | } | |
664 | ||
665 | /* Reinitialize device on resume from hibernation */ | |
666 | static int applesmc_pm_restore(struct device *dev) | |
667 | { | |
668 | applesmc_device_init(); | |
669 | return applesmc_pm_resume(dev); | |
670 | } | |
671 | ||
672 | static const struct dev_pm_ops applesmc_pm_ops = { | |
673 | .resume = applesmc_pm_resume, | |
674 | .restore = applesmc_pm_restore, | |
675 | }; | |
676 | ||
677 | static struct platform_driver applesmc_driver = { | |
678 | .probe = applesmc_probe, | |
679 | .driver = { | |
680 | .name = "applesmc", | |
681 | .pm = &applesmc_pm_ops, | |
682 | }, | |
683 | }; | |
684 | ||
685 | /* | |
686 | * applesmc_calibrate - Set our "resting" values. Callers must | |
687 | * hold applesmc_lock. | |
688 | */ | |
689 | static void applesmc_calibrate(void) | |
690 | { | |
691 | applesmc_read_s16(MOTION_SENSOR_X_KEY, &rest_x); | |
692 | applesmc_read_s16(MOTION_SENSOR_Y_KEY, &rest_y); | |
693 | rest_x = -rest_x; | |
694 | } | |
695 | ||
696 | static void applesmc_idev_poll(struct input_polled_dev *dev) | |
697 | { | |
698 | struct input_dev *idev = dev->input; | |
699 | s16 x, y; | |
700 | ||
701 | if (applesmc_read_s16(MOTION_SENSOR_X_KEY, &x)) | |
702 | return; | |
703 | if (applesmc_read_s16(MOTION_SENSOR_Y_KEY, &y)) | |
704 | return; | |
705 | ||
706 | x = -x; | |
707 | input_report_abs(idev, ABS_X, x - rest_x); | |
708 | input_report_abs(idev, ABS_Y, y - rest_y); | |
709 | input_sync(idev); | |
710 | } | |
711 | ||
712 | /* Sysfs Files */ | |
713 | ||
714 | static ssize_t applesmc_name_show(struct device *dev, | |
715 | struct device_attribute *attr, char *buf) | |
716 | { | |
717 | return snprintf(buf, PAGE_SIZE, "applesmc\n"); | |
718 | } | |
719 | ||
720 | static ssize_t applesmc_position_show(struct device *dev, | |
721 | struct device_attribute *attr, char *buf) | |
722 | { | |
723 | int ret; | |
724 | s16 x, y, z; | |
725 | ||
726 | ret = applesmc_read_s16(MOTION_SENSOR_X_KEY, &x); | |
727 | if (ret) | |
728 | goto out; | |
729 | ret = applesmc_read_s16(MOTION_SENSOR_Y_KEY, &y); | |
730 | if (ret) | |
731 | goto out; | |
732 | ret = applesmc_read_s16(MOTION_SENSOR_Z_KEY, &z); | |
733 | if (ret) | |
734 | goto out; | |
735 | ||
736 | out: | |
737 | if (ret) | |
738 | return ret; | |
739 | else | |
740 | return snprintf(buf, PAGE_SIZE, "(%d,%d,%d)\n", x, y, z); | |
741 | } | |
742 | ||
743 | static ssize_t applesmc_light_show(struct device *dev, | |
744 | struct device_attribute *attr, char *sysfsbuf) | |
745 | { | |
746 | const struct applesmc_entry *entry; | |
747 | static int data_length; | |
748 | int ret; | |
749 | u8 left = 0, right = 0; | |
750 | u8 buffer[10]; | |
751 | ||
752 | if (!data_length) { | |
753 | entry = applesmc_get_entry_by_key(LIGHT_SENSOR_LEFT_KEY); | |
754 | if (IS_ERR(entry)) | |
755 | return PTR_ERR(entry); | |
756 | if (entry->len > 10) | |
757 | return -ENXIO; | |
758 | data_length = entry->len; | |
759 | pr_info("light sensor data length set to %d\n", data_length); | |
760 | } | |
761 | ||
762 | ret = applesmc_read_key(LIGHT_SENSOR_LEFT_KEY, buffer, data_length); | |
763 | /* newer macbooks report a single 10-bit bigendian value */ | |
764 | if (data_length == 10) { | |
765 | left = be16_to_cpu(*(__be16 *)(buffer + 6)) >> 2; | |
766 | goto out; | |
767 | } | |
768 | left = buffer[2]; | |
769 | if (ret) | |
770 | goto out; | |
771 | ret = applesmc_read_key(LIGHT_SENSOR_RIGHT_KEY, buffer, data_length); | |
772 | right = buffer[2]; | |
773 | ||
774 | out: | |
775 | if (ret) | |
776 | return ret; | |
777 | else | |
778 | return snprintf(sysfsbuf, PAGE_SIZE, "(%d,%d)\n", left, right); | |
779 | } | |
780 | ||
781 | /* Displays sensor key as label */ | |
782 | static ssize_t applesmc_show_sensor_label(struct device *dev, | |
783 | struct device_attribute *devattr, char *sysfsbuf) | |
784 | { | |
785 | const char *key = smcreg.index[to_index(devattr)]; | |
786 | ||
787 | return snprintf(sysfsbuf, PAGE_SIZE, "%s\n", key); | |
788 | } | |
789 | ||
790 | /* Displays degree Celsius * 1000 */ | |
791 | static ssize_t applesmc_show_temperature(struct device *dev, | |
792 | struct device_attribute *devattr, char *sysfsbuf) | |
793 | { | |
794 | const char *key = smcreg.index[to_index(devattr)]; | |
795 | int ret; | |
796 | s16 value; | |
797 | int temp; | |
798 | ||
799 | ret = applesmc_read_s16(key, &value); | |
800 | if (ret) | |
801 | return ret; | |
802 | ||
803 | temp = 250 * (value >> 6); | |
804 | ||
805 | return snprintf(sysfsbuf, PAGE_SIZE, "%d\n", temp); | |
806 | } | |
807 | ||
808 | static ssize_t applesmc_show_fan_speed(struct device *dev, | |
809 | struct device_attribute *attr, char *sysfsbuf) | |
810 | { | |
811 | int ret; | |
812 | unsigned int speed = 0; | |
813 | char newkey[5]; | |
814 | u8 buffer[2]; | |
815 | ||
816 | scnprintf(newkey, sizeof(newkey), fan_speed_fmt[to_option(attr)], | |
817 | to_index(attr)); | |
818 | ||
819 | ret = applesmc_read_key(newkey, buffer, 2); | |
820 | speed = ((buffer[0] << 8 | buffer[1]) >> 2); | |
821 | ||
822 | if (ret) | |
823 | return ret; | |
824 | else | |
825 | return snprintf(sysfsbuf, PAGE_SIZE, "%u\n", speed); | |
826 | } | |
827 | ||
828 | static ssize_t applesmc_store_fan_speed(struct device *dev, | |
829 | struct device_attribute *attr, | |
830 | const char *sysfsbuf, size_t count) | |
831 | { | |
832 | int ret; | |
833 | unsigned long speed; | |
834 | char newkey[5]; | |
835 | u8 buffer[2]; | |
836 | ||
837 | if (kstrtoul(sysfsbuf, 10, &speed) < 0 || speed >= 0x4000) | |
838 | return -EINVAL; /* Bigger than a 14-bit value */ | |
839 | ||
840 | scnprintf(newkey, sizeof(newkey), fan_speed_fmt[to_option(attr)], | |
841 | to_index(attr)); | |
842 | ||
843 | buffer[0] = (speed >> 6) & 0xff; | |
844 | buffer[1] = (speed << 2) & 0xff; | |
845 | ret = applesmc_write_key(newkey, buffer, 2); | |
846 | ||
847 | if (ret) | |
848 | return ret; | |
849 | else | |
850 | return count; | |
851 | } | |
852 | ||
853 | static ssize_t applesmc_show_fan_manual(struct device *dev, | |
854 | struct device_attribute *attr, char *sysfsbuf) | |
855 | { | |
856 | int ret; | |
857 | u16 manual = 0; | |
858 | u8 buffer[2]; | |
859 | ||
860 | ret = applesmc_read_key(FANS_MANUAL, buffer, 2); | |
861 | manual = ((buffer[0] << 8 | buffer[1]) >> to_index(attr)) & 0x01; | |
862 | ||
863 | if (ret) | |
864 | return ret; | |
865 | else | |
866 | return snprintf(sysfsbuf, PAGE_SIZE, "%d\n", manual); | |
867 | } | |
868 | ||
869 | static ssize_t applesmc_store_fan_manual(struct device *dev, | |
870 | struct device_attribute *attr, | |
871 | const char *sysfsbuf, size_t count) | |
872 | { | |
873 | int ret; | |
874 | u8 buffer[2]; | |
875 | unsigned long input; | |
876 | u16 val; | |
877 | ||
878 | if (kstrtoul(sysfsbuf, 10, &input) < 0) | |
879 | return -EINVAL; | |
880 | ||
881 | ret = applesmc_read_key(FANS_MANUAL, buffer, 2); | |
882 | val = (buffer[0] << 8 | buffer[1]); | |
883 | if (ret) | |
884 | goto out; | |
885 | ||
886 | if (input) | |
887 | val = val | (0x01 << to_index(attr)); | |
888 | else | |
889 | val = val & ~(0x01 << to_index(attr)); | |
890 | ||
891 | buffer[0] = (val >> 8) & 0xFF; | |
892 | buffer[1] = val & 0xFF; | |
893 | ||
894 | ret = applesmc_write_key(FANS_MANUAL, buffer, 2); | |
895 | ||
896 | out: | |
897 | if (ret) | |
898 | return ret; | |
899 | else | |
900 | return count; | |
901 | } | |
902 | ||
903 | static ssize_t applesmc_show_fan_position(struct device *dev, | |
904 | struct device_attribute *attr, char *sysfsbuf) | |
905 | { | |
906 | int ret; | |
907 | char newkey[5]; | |
908 | u8 buffer[17]; | |
909 | ||
910 | scnprintf(newkey, sizeof(newkey), FAN_ID_FMT, to_index(attr)); | |
911 | ||
912 | ret = applesmc_read_key(newkey, buffer, 16); | |
913 | buffer[16] = 0; | |
914 | ||
915 | if (ret) | |
916 | return ret; | |
917 | else | |
918 | return snprintf(sysfsbuf, PAGE_SIZE, "%s\n", buffer+4); | |
919 | } | |
920 | ||
921 | static ssize_t applesmc_calibrate_show(struct device *dev, | |
922 | struct device_attribute *attr, char *sysfsbuf) | |
923 | { | |
924 | return snprintf(sysfsbuf, PAGE_SIZE, "(%d,%d)\n", rest_x, rest_y); | |
925 | } | |
926 | ||
927 | static ssize_t applesmc_calibrate_store(struct device *dev, | |
928 | struct device_attribute *attr, const char *sysfsbuf, size_t count) | |
929 | { | |
930 | applesmc_calibrate(); | |
931 | ||
932 | return count; | |
933 | } | |
934 | ||
935 | static void applesmc_backlight_set(struct work_struct *work) | |
936 | { | |
937 | applesmc_write_key(BACKLIGHT_KEY, backlight_state, 2); | |
938 | } | |
939 | static DECLARE_WORK(backlight_work, &applesmc_backlight_set); | |
940 | ||
941 | static void applesmc_brightness_set(struct led_classdev *led_cdev, | |
942 | enum led_brightness value) | |
943 | { | |
944 | int ret; | |
945 | ||
946 | backlight_state[0] = value; | |
947 | ret = queue_work(applesmc_led_wq, &backlight_work); | |
948 | ||
949 | if (debug && (!ret)) | |
950 | dev_dbg(led_cdev->dev, "work was already on the queue.\n"); | |
951 | } | |
952 | ||
953 | static ssize_t applesmc_key_count_show(struct device *dev, | |
954 | struct device_attribute *attr, char *sysfsbuf) | |
955 | { | |
956 | int ret; | |
957 | u8 buffer[4]; | |
958 | u32 count; | |
959 | ||
960 | ret = applesmc_read_key(KEY_COUNT_KEY, buffer, 4); | |
961 | count = ((u32)buffer[0]<<24) + ((u32)buffer[1]<<16) + | |
962 | ((u32)buffer[2]<<8) + buffer[3]; | |
963 | ||
964 | if (ret) | |
965 | return ret; | |
966 | else | |
967 | return snprintf(sysfsbuf, PAGE_SIZE, "%d\n", count); | |
968 | } | |
969 | ||
970 | static ssize_t applesmc_key_at_index_read_show(struct device *dev, | |
971 | struct device_attribute *attr, char *sysfsbuf) | |
972 | { | |
973 | const struct applesmc_entry *entry; | |
974 | int ret; | |
975 | ||
976 | entry = applesmc_get_entry_by_index(key_at_index); | |
977 | if (IS_ERR(entry)) | |
978 | return PTR_ERR(entry); | |
979 | ret = applesmc_read_entry(entry, sysfsbuf, entry->len); | |
980 | if (ret) | |
981 | return ret; | |
982 | ||
983 | return entry->len; | |
984 | } | |
985 | ||
986 | static ssize_t applesmc_key_at_index_data_length_show(struct device *dev, | |
987 | struct device_attribute *attr, char *sysfsbuf) | |
988 | { | |
989 | const struct applesmc_entry *entry; | |
990 | ||
991 | entry = applesmc_get_entry_by_index(key_at_index); | |
992 | if (IS_ERR(entry)) | |
993 | return PTR_ERR(entry); | |
994 | ||
995 | return snprintf(sysfsbuf, PAGE_SIZE, "%d\n", entry->len); | |
996 | } | |
997 | ||
998 | static ssize_t applesmc_key_at_index_type_show(struct device *dev, | |
999 | struct device_attribute *attr, char *sysfsbuf) | |
1000 | { | |
1001 | const struct applesmc_entry *entry; | |
1002 | ||
1003 | entry = applesmc_get_entry_by_index(key_at_index); | |
1004 | if (IS_ERR(entry)) | |
1005 | return PTR_ERR(entry); | |
1006 | ||
1007 | return snprintf(sysfsbuf, PAGE_SIZE, "%s\n", entry->type); | |
1008 | } | |
1009 | ||
1010 | static ssize_t applesmc_key_at_index_name_show(struct device *dev, | |
1011 | struct device_attribute *attr, char *sysfsbuf) | |
1012 | { | |
1013 | const struct applesmc_entry *entry; | |
1014 | ||
1015 | entry = applesmc_get_entry_by_index(key_at_index); | |
1016 | if (IS_ERR(entry)) | |
1017 | return PTR_ERR(entry); | |
1018 | ||
1019 | return snprintf(sysfsbuf, PAGE_SIZE, "%s\n", entry->key); | |
1020 | } | |
1021 | ||
1022 | static ssize_t applesmc_key_at_index_show(struct device *dev, | |
1023 | struct device_attribute *attr, char *sysfsbuf) | |
1024 | { | |
1025 | return snprintf(sysfsbuf, PAGE_SIZE, "%d\n", key_at_index); | |
1026 | } | |
1027 | ||
1028 | static ssize_t applesmc_key_at_index_store(struct device *dev, | |
1029 | struct device_attribute *attr, const char *sysfsbuf, size_t count) | |
1030 | { | |
1031 | unsigned long newkey; | |
1032 | ||
1033 | if (kstrtoul(sysfsbuf, 10, &newkey) < 0 | |
1034 | || newkey >= smcreg.key_count) | |
1035 | return -EINVAL; | |
1036 | ||
1037 | key_at_index = newkey; | |
1038 | return count; | |
1039 | } | |
1040 | ||
1041 | static struct led_classdev applesmc_backlight = { | |
1042 | .name = "smc::kbd_backlight", | |
1043 | .default_trigger = "nand-disk", | |
1044 | .brightness_set = applesmc_brightness_set, | |
1045 | }; | |
1046 | ||
1047 | static struct applesmc_node_group info_group[] = { | |
1048 | { "name", applesmc_name_show }, | |
1049 | { "key_count", applesmc_key_count_show }, | |
1050 | { "key_at_index", applesmc_key_at_index_show, applesmc_key_at_index_store }, | |
1051 | { "key_at_index_name", applesmc_key_at_index_name_show }, | |
1052 | { "key_at_index_type", applesmc_key_at_index_type_show }, | |
1053 | { "key_at_index_data_length", applesmc_key_at_index_data_length_show }, | |
1054 | { "key_at_index_data", applesmc_key_at_index_read_show }, | |
1055 | { } | |
1056 | }; | |
1057 | ||
1058 | static struct applesmc_node_group accelerometer_group[] = { | |
1059 | { "position", applesmc_position_show }, | |
1060 | { "calibrate", applesmc_calibrate_show, applesmc_calibrate_store }, | |
1061 | { } | |
1062 | }; | |
1063 | ||
1064 | static struct applesmc_node_group light_sensor_group[] = { | |
1065 | { "light", applesmc_light_show }, | |
1066 | { } | |
1067 | }; | |
1068 | ||
1069 | static struct applesmc_node_group fan_group[] = { | |
1070 | { "fan%d_label", applesmc_show_fan_position }, | |
1071 | { "fan%d_input", applesmc_show_fan_speed, NULL, 0 }, | |
1072 | { "fan%d_min", applesmc_show_fan_speed, applesmc_store_fan_speed, 1 }, | |
1073 | { "fan%d_max", applesmc_show_fan_speed, NULL, 2 }, | |
1074 | { "fan%d_safe", applesmc_show_fan_speed, NULL, 3 }, | |
1075 | { "fan%d_output", applesmc_show_fan_speed, applesmc_store_fan_speed, 4 }, | |
1076 | { "fan%d_manual", applesmc_show_fan_manual, applesmc_store_fan_manual }, | |
1077 | { } | |
1078 | }; | |
1079 | ||
1080 | static struct applesmc_node_group temp_group[] = { | |
1081 | { "temp%d_label", applesmc_show_sensor_label }, | |
1082 | { "temp%d_input", applesmc_show_temperature }, | |
1083 | { } | |
1084 | }; | |
1085 | ||
1086 | /* Module stuff */ | |
1087 | ||
1088 | /* | |
1089 | * applesmc_destroy_nodes - remove files and free associated memory | |
1090 | */ | |
1091 | static void applesmc_destroy_nodes(struct applesmc_node_group *groups) | |
1092 | { | |
1093 | struct applesmc_node_group *grp; | |
1094 | struct applesmc_dev_attr *node; | |
1095 | ||
1096 | for (grp = groups; grp->nodes; grp++) { | |
1097 | for (node = grp->nodes; node->sda.dev_attr.attr.name; node++) | |
1098 | sysfs_remove_file(&pdev->dev.kobj, | |
1099 | &node->sda.dev_attr.attr); | |
1100 | kfree(grp->nodes); | |
1101 | grp->nodes = NULL; | |
1102 | } | |
1103 | } | |
1104 | ||
1105 | /* | |
1106 | * applesmc_create_nodes - create a two-dimensional group of sysfs files | |
1107 | */ | |
1108 | static int applesmc_create_nodes(struct applesmc_node_group *groups, int num) | |
1109 | { | |
1110 | struct applesmc_node_group *grp; | |
1111 | struct applesmc_dev_attr *node; | |
1112 | struct attribute *attr; | |
1113 | int ret, i; | |
1114 | ||
1115 | for (grp = groups; grp->format; grp++) { | |
1116 | grp->nodes = kcalloc(num + 1, sizeof(*node), GFP_KERNEL); | |
1117 | if (!grp->nodes) { | |
1118 | ret = -ENOMEM; | |
1119 | goto out; | |
1120 | } | |
1121 | for (i = 0; i < num; i++) { | |
1122 | node = &grp->nodes[i]; | |
1123 | scnprintf(node->name, sizeof(node->name), grp->format, | |
1124 | i + 1); | |
1125 | node->sda.index = (grp->option << 16) | (i & 0xffff); | |
1126 | node->sda.dev_attr.show = grp->show; | |
1127 | node->sda.dev_attr.store = grp->store; | |
1128 | attr = &node->sda.dev_attr.attr; | |
1129 | sysfs_attr_init(attr); | |
1130 | attr->name = node->name; | |
1131 | attr->mode = S_IRUGO | (grp->store ? S_IWUSR : 0); | |
1132 | ret = sysfs_create_file(&pdev->dev.kobj, attr); | |
1133 | if (ret) { | |
1134 | attr->name = NULL; | |
1135 | goto out; | |
1136 | } | |
1137 | } | |
1138 | } | |
1139 | ||
1140 | return 0; | |
1141 | out: | |
1142 | applesmc_destroy_nodes(groups); | |
1143 | return ret; | |
1144 | } | |
1145 | ||
1146 | /* Create accelerometer resources */ | |
1147 | static int applesmc_create_accelerometer(void) | |
1148 | { | |
1149 | struct input_dev *idev; | |
1150 | int ret; | |
1151 | ||
1152 | if (!smcreg.has_accelerometer) | |
1153 | return 0; | |
1154 | ||
1155 | ret = applesmc_create_nodes(accelerometer_group, 1); | |
1156 | if (ret) | |
1157 | goto out; | |
1158 | ||
1159 | applesmc_idev = input_allocate_polled_device(); | |
1160 | if (!applesmc_idev) { | |
1161 | ret = -ENOMEM; | |
1162 | goto out_sysfs; | |
1163 | } | |
1164 | ||
1165 | applesmc_idev->poll = applesmc_idev_poll; | |
1166 | applesmc_idev->poll_interval = APPLESMC_POLL_INTERVAL; | |
1167 | ||
1168 | /* initial calibrate for the input device */ | |
1169 | applesmc_calibrate(); | |
1170 | ||
1171 | /* initialize the input device */ | |
1172 | idev = applesmc_idev->input; | |
1173 | idev->name = "applesmc"; | |
1174 | idev->id.bustype = BUS_HOST; | |
1175 | idev->dev.parent = &pdev->dev; | |
1176 | idev->evbit[0] = BIT_MASK(EV_ABS); | |
1177 | input_set_abs_params(idev, ABS_X, | |
1178 | -256, 256, APPLESMC_INPUT_FUZZ, APPLESMC_INPUT_FLAT); | |
1179 | input_set_abs_params(idev, ABS_Y, | |
1180 | -256, 256, APPLESMC_INPUT_FUZZ, APPLESMC_INPUT_FLAT); | |
1181 | ||
1182 | ret = input_register_polled_device(applesmc_idev); | |
1183 | if (ret) | |
1184 | goto out_idev; | |
1185 | ||
1186 | return 0; | |
1187 | ||
1188 | out_idev: | |
1189 | input_free_polled_device(applesmc_idev); | |
1190 | ||
1191 | out_sysfs: | |
1192 | applesmc_destroy_nodes(accelerometer_group); | |
1193 | ||
1194 | out: | |
1195 | pr_warn("driver init failed (ret=%d)!\n", ret); | |
1196 | return ret; | |
1197 | } | |
1198 | ||
1199 | /* Release all resources used by the accelerometer */ | |
1200 | static void applesmc_release_accelerometer(void) | |
1201 | { | |
1202 | if (!smcreg.has_accelerometer) | |
1203 | return; | |
1204 | input_unregister_polled_device(applesmc_idev); | |
1205 | input_free_polled_device(applesmc_idev); | |
1206 | applesmc_destroy_nodes(accelerometer_group); | |
1207 | } | |
1208 | ||
1209 | static int applesmc_create_light_sensor(void) | |
1210 | { | |
1211 | if (!smcreg.num_light_sensors) | |
1212 | return 0; | |
1213 | return applesmc_create_nodes(light_sensor_group, 1); | |
1214 | } | |
1215 | ||
1216 | static void applesmc_release_light_sensor(void) | |
1217 | { | |
1218 | if (!smcreg.num_light_sensors) | |
1219 | return; | |
1220 | applesmc_destroy_nodes(light_sensor_group); | |
1221 | } | |
1222 | ||
1223 | static int applesmc_create_key_backlight(void) | |
1224 | { | |
1225 | if (!smcreg.has_key_backlight) | |
1226 | return 0; | |
1227 | applesmc_led_wq = create_singlethread_workqueue("applesmc-led"); | |
1228 | if (!applesmc_led_wq) | |
1229 | return -ENOMEM; | |
1230 | return led_classdev_register(&pdev->dev, &applesmc_backlight); | |
1231 | } | |
1232 | ||
1233 | static void applesmc_release_key_backlight(void) | |
1234 | { | |
1235 | if (!smcreg.has_key_backlight) | |
1236 | return; | |
1237 | led_classdev_unregister(&applesmc_backlight); | |
1238 | destroy_workqueue(applesmc_led_wq); | |
1239 | } | |
1240 | ||
1241 | static int applesmc_dmi_match(const struct dmi_system_id *id) | |
1242 | { | |
1243 | return 1; | |
1244 | } | |
1245 | ||
1246 | /* | |
1247 | * Note that DMI_MATCH(...,"MacBook") will match "MacBookPro1,1". | |
1248 | * So we need to put "Apple MacBook Pro" before "Apple MacBook". | |
1249 | */ | |
1250 | static __initdata struct dmi_system_id applesmc_whitelist[] = { | |
1251 | { applesmc_dmi_match, "Apple MacBook Air", { | |
1252 | DMI_MATCH(DMI_BOARD_VENDOR, "Apple"), | |
1253 | DMI_MATCH(DMI_PRODUCT_NAME, "MacBookAir") }, | |
1254 | }, | |
1255 | { applesmc_dmi_match, "Apple MacBook Pro", { | |
1256 | DMI_MATCH(DMI_BOARD_VENDOR, "Apple"), | |
1257 | DMI_MATCH(DMI_PRODUCT_NAME, "MacBookPro") }, | |
1258 | }, | |
1259 | { applesmc_dmi_match, "Apple MacBook", { | |
1260 | DMI_MATCH(DMI_BOARD_VENDOR, "Apple"), | |
1261 | DMI_MATCH(DMI_PRODUCT_NAME, "MacBook") }, | |
1262 | }, | |
1263 | { applesmc_dmi_match, "Apple Macmini", { | |
1264 | DMI_MATCH(DMI_BOARD_VENDOR, "Apple"), | |
1265 | DMI_MATCH(DMI_PRODUCT_NAME, "Macmini") }, | |
1266 | }, | |
1267 | { applesmc_dmi_match, "Apple MacPro", { | |
1268 | DMI_MATCH(DMI_BOARD_VENDOR, "Apple"), | |
1269 | DMI_MATCH(DMI_PRODUCT_NAME, "MacPro") }, | |
1270 | }, | |
1271 | { applesmc_dmi_match, "Apple iMac", { | |
1272 | DMI_MATCH(DMI_BOARD_VENDOR, "Apple"), | |
1273 | DMI_MATCH(DMI_PRODUCT_NAME, "iMac") }, | |
1274 | }, | |
1275 | { .ident = NULL } | |
1276 | }; | |
1277 | ||
1278 | static int __init applesmc_init(void) | |
1279 | { | |
1280 | int ret; | |
1281 | ||
1282 | if (!dmi_check_system(applesmc_whitelist)) { | |
1283 | pr_warn("supported laptop not found!\n"); | |
1284 | ret = -ENODEV; | |
1285 | goto out; | |
1286 | } | |
1287 | ||
1288 | if (!request_region(APPLESMC_DATA_PORT, APPLESMC_NR_PORTS, | |
1289 | "applesmc")) { | |
1290 | ret = -ENXIO; | |
1291 | goto out; | |
1292 | } | |
1293 | ||
1294 | ret = platform_driver_register(&applesmc_driver); | |
1295 | if (ret) | |
1296 | goto out_region; | |
1297 | ||
1298 | pdev = platform_device_register_simple("applesmc", APPLESMC_DATA_PORT, | |
1299 | NULL, 0); | |
1300 | if (IS_ERR(pdev)) { | |
1301 | ret = PTR_ERR(pdev); | |
1302 | goto out_driver; | |
1303 | } | |
1304 | ||
1305 | /* create register cache */ | |
1306 | ret = applesmc_init_smcreg(); | |
1307 | if (ret) | |
1308 | goto out_device; | |
1309 | ||
1310 | ret = applesmc_create_nodes(info_group, 1); | |
1311 | if (ret) | |
1312 | goto out_smcreg; | |
1313 | ||
1314 | ret = applesmc_create_nodes(fan_group, smcreg.fan_count); | |
1315 | if (ret) | |
1316 | goto out_info; | |
1317 | ||
1318 | ret = applesmc_create_nodes(temp_group, smcreg.index_count); | |
1319 | if (ret) | |
1320 | goto out_fans; | |
1321 | ||
1322 | ret = applesmc_create_accelerometer(); | |
1323 | if (ret) | |
1324 | goto out_temperature; | |
1325 | ||
1326 | ret = applesmc_create_light_sensor(); | |
1327 | if (ret) | |
1328 | goto out_accelerometer; | |
1329 | ||
1330 | ret = applesmc_create_key_backlight(); | |
1331 | if (ret) | |
1332 | goto out_light_sysfs; | |
1333 | ||
1334 | hwmon_dev = hwmon_device_register(&pdev->dev); | |
1335 | if (IS_ERR(hwmon_dev)) { | |
1336 | ret = PTR_ERR(hwmon_dev); | |
1337 | goto out_light_ledclass; | |
1338 | } | |
1339 | ||
1340 | return 0; | |
1341 | ||
1342 | out_light_ledclass: | |
1343 | applesmc_release_key_backlight(); | |
1344 | out_light_sysfs: | |
1345 | applesmc_release_light_sensor(); | |
1346 | out_accelerometer: | |
1347 | applesmc_release_accelerometer(); | |
1348 | out_temperature: | |
1349 | applesmc_destroy_nodes(temp_group); | |
1350 | out_fans: | |
1351 | applesmc_destroy_nodes(fan_group); | |
1352 | out_info: | |
1353 | applesmc_destroy_nodes(info_group); | |
1354 | out_smcreg: | |
1355 | applesmc_destroy_smcreg(); | |
1356 | out_device: | |
1357 | platform_device_unregister(pdev); | |
1358 | out_driver: | |
1359 | platform_driver_unregister(&applesmc_driver); | |
1360 | out_region: | |
1361 | release_region(APPLESMC_DATA_PORT, APPLESMC_NR_PORTS); | |
1362 | out: | |
1363 | pr_warn("driver init failed (ret=%d)!\n", ret); | |
1364 | return ret; | |
1365 | } | |
1366 | ||
1367 | static void __exit applesmc_exit(void) | |
1368 | { | |
1369 | hwmon_device_unregister(hwmon_dev); | |
1370 | applesmc_release_key_backlight(); | |
1371 | applesmc_release_light_sensor(); | |
1372 | applesmc_release_accelerometer(); | |
1373 | applesmc_destroy_nodes(temp_group); | |
1374 | applesmc_destroy_nodes(fan_group); | |
1375 | applesmc_destroy_nodes(info_group); | |
1376 | applesmc_destroy_smcreg(); | |
1377 | platform_device_unregister(pdev); | |
1378 | platform_driver_unregister(&applesmc_driver); | |
1379 | release_region(APPLESMC_DATA_PORT, APPLESMC_NR_PORTS); | |
1380 | } | |
1381 | ||
1382 | module_init(applesmc_init); | |
1383 | module_exit(applesmc_exit); | |
1384 | ||
1385 | MODULE_AUTHOR("Nicolas Boichat"); | |
1386 | MODULE_DESCRIPTION("Apple SMC"); | |
1387 | MODULE_LICENSE("GPL v2"); | |
1388 | MODULE_DEVICE_TABLE(dmi, applesmc_whitelist); |