1 | // SPDX-License-Identifier: GPL-2.0-only |
2 | /* |
3 | * drivers/hwmon/applesmc.c - driver for Apple's SMC (accelerometer, temperature |
4 | * sensors, fan control, keyboard backlight control) used in Intel-based Apple |
5 | * computers. |
6 | * |
7 | * Copyright (C) 2007 Nicolas Boichat <nicolas@boichat.ch> |
8 | * Copyright (C) 2010 Henrik Rydberg <rydberg@euromail.se> |
9 | * |
10 | * Based on hdaps.c driver: |
11 | * Copyright (C) 2005 Robert Love <rml@novell.com> |
12 | * Copyright (C) 2005 Jesper Juhl <jj@chaosbits.net> |
13 | * |
14 | * Fan control based on smcFanControl: |
15 | * Copyright (C) 2006 Hendrik Holtmann <holtmann@mac.com> |
16 | */ |
17 | |
18 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
19 | |
20 | #include <linux/delay.h> |
21 | #include <linux/platform_device.h> |
22 | #include <linux/input.h> |
23 | #include <linux/kernel.h> |
24 | #include <linux/slab.h> |
25 | #include <linux/module.h> |
26 | #include <linux/timer.h> |
27 | #include <linux/dmi.h> |
28 | #include <linux/mutex.h> |
29 | #include <linux/hwmon-sysfs.h> |
30 | #include <linux/io.h> |
31 | #include <linux/leds.h> |
32 | #include <linux/hwmon.h> |
33 | #include <linux/workqueue.h> |
34 | #include <linux/err.h> |
35 | #include <linux/bits.h> |
36 | |
37 | /* data port used by Apple SMC */ |
38 | #define APPLESMC_DATA_PORT 0x300 |
39 | /* command/status port used by Apple SMC */ |
40 | #define APPLESMC_CMD_PORT 0x304 |
41 | |
42 | #define APPLESMC_NR_PORTS 32 /* 0x300-0x31f */ |
43 | |
44 | #define APPLESMC_MAX_DATA_LENGTH 32 |
45 | |
46 | /* Apple SMC status bits */ |
47 | #define SMC_STATUS_AWAITING_DATA BIT(0) /* SMC has data waiting to be read */ |
48 | #define SMC_STATUS_IB_CLOSED BIT(1) /* Will ignore any input */ |
49 | #define SMC_STATUS_BUSY BIT(2) /* Command in progress */ |
50 | |
51 | /* Initial wait is 8us */ |
52 | #define APPLESMC_MIN_WAIT 0x0008 |
53 | |
54 | #define APPLESMC_READ_CMD 0x10 |
55 | #define APPLESMC_WRITE_CMD 0x11 |
56 | #define APPLESMC_GET_KEY_BY_INDEX_CMD 0x12 |
57 | #define APPLESMC_GET_KEY_TYPE_CMD 0x13 |
58 | |
59 | #define KEY_COUNT_KEY "#KEY" /* r-o ui32 */ |
60 | |
61 | #define LIGHT_SENSOR_LEFT_KEY "ALV0" /* r-o {alv (6-10 bytes) */ |
62 | #define LIGHT_SENSOR_RIGHT_KEY "ALV1" /* r-o {alv (6-10 bytes) */ |
63 | #define BACKLIGHT_KEY "LKSB" /* w-o {lkb (2 bytes) */ |
64 | |
65 | #define CLAMSHELL_KEY "MSLD" /* r-o ui8 (unused) */ |
66 | |
67 | #define MOTION_SENSOR_X_KEY "MO_X" /* r-o sp78 (2 bytes) */ |
68 | #define MOTION_SENSOR_Y_KEY "MO_Y" /* r-o sp78 (2 bytes) */ |
69 | #define MOTION_SENSOR_Z_KEY "MO_Z" /* r-o sp78 (2 bytes) */ |
70 | #define MOTION_SENSOR_KEY "MOCN" /* r/w ui16 */ |
71 | |
72 | #define FANS_COUNT "FNum" /* r-o ui8 */ |
73 | #define FANS_MANUAL "FS! " /* r-w ui16 */ |
74 | #define FAN_ID_FMT "F%dID" /* r-o char[16] */ |
75 | |
76 | #define TEMP_SENSOR_TYPE "sp78" |
77 | |
78 | /* List of keys used to read/write fan speeds */ |
79 | static const char *const fan_speed_fmt[] = { |
80 | "F%dAc" , /* actual speed */ |
81 | "F%dMn" , /* minimum speed (rw) */ |
82 | "F%dMx" , /* maximum speed */ |
83 | "F%dSf" , /* safe speed - not all models */ |
84 | "F%dTg" , /* target speed (manual: rw) */ |
85 | }; |
86 | |
87 | #define INIT_TIMEOUT_MSECS 5000 /* wait up to 5s for device init ... */ |
88 | #define INIT_WAIT_MSECS 50 /* ... in 50ms increments */ |
89 | |
90 | #define APPLESMC_POLL_INTERVAL 50 /* msecs */ |
91 | #define APPLESMC_INPUT_FUZZ 4 /* input event threshold */ |
92 | #define APPLESMC_INPUT_FLAT 4 |
93 | |
94 | #define to_index(attr) (to_sensor_dev_attr(attr)->index & 0xffff) |
95 | #define to_option(attr) (to_sensor_dev_attr(attr)->index >> 16) |
96 | |
97 | /* Dynamic device node attributes */ |
98 | struct applesmc_dev_attr { |
99 | struct sensor_device_attribute sda; /* hwmon attributes */ |
100 | char name[32]; /* room for node file name */ |
101 | }; |
102 | |
103 | /* Dynamic device node group */ |
104 | struct applesmc_node_group { |
105 | char *format; /* format string */ |
106 | void *show; /* show function */ |
107 | void *store; /* store function */ |
108 | int option; /* function argument */ |
109 | struct applesmc_dev_attr *nodes; /* dynamic node array */ |
110 | }; |
111 | |
112 | /* AppleSMC entry - cached register information */ |
113 | struct applesmc_entry { |
114 | char key[5]; /* four-letter key code */ |
115 | u8 valid; /* set when entry is successfully read once */ |
116 | u8 len; /* bounded by APPLESMC_MAX_DATA_LENGTH */ |
117 | char type[5]; /* four-letter type code */ |
118 | u8 flags; /* 0x10: func; 0x40: write; 0x80: read */ |
119 | }; |
120 | |
121 | /* Register lookup and registers common to all SMCs */ |
122 | static struct applesmc_registers { |
123 | struct mutex mutex; /* register read/write mutex */ |
124 | unsigned int key_count; /* number of SMC registers */ |
125 | unsigned int fan_count; /* number of fans */ |
126 | unsigned int temp_count; /* number of temperature registers */ |
127 | unsigned int temp_begin; /* temperature lower index bound */ |
128 | unsigned int temp_end; /* temperature upper index bound */ |
129 | unsigned int index_count; /* size of temperature index array */ |
130 | int num_light_sensors; /* number of light sensors */ |
131 | bool has_accelerometer; /* has motion sensor */ |
132 | bool has_key_backlight; /* has keyboard backlight */ |
133 | bool init_complete; /* true when fully initialized */ |
134 | struct applesmc_entry *cache; /* cached key entries */ |
135 | const char **index; /* temperature key index */ |
136 | } smcreg = { |
137 | .mutex = __MUTEX_INITIALIZER(smcreg.mutex), |
138 | }; |
139 | |
140 | static const int debug; |
141 | static struct platform_device *pdev; |
142 | static s16 rest_x; |
143 | static s16 rest_y; |
144 | static u8 backlight_state[2]; |
145 | |
146 | static struct device *hwmon_dev; |
147 | static struct input_dev *applesmc_idev; |
148 | |
149 | /* |
150 | * Last index written to key_at_index sysfs file, and value to use for all other |
151 | * key_at_index_* sysfs files. |
152 | */ |
153 | static unsigned int key_at_index; |
154 | |
155 | static struct workqueue_struct *applesmc_led_wq; |
156 | |
157 | /* |
158 | * Wait for specific status bits with a mask on the SMC. |
159 | * Used before all transactions. |
160 | * This does 10 fast loops of 8us then exponentially backs off for a |
161 | * minimum total wait of 262ms. Depending on usleep_range this could |
162 | * run out past 500ms. |
163 | */ |
164 | |
165 | static int wait_status(u8 val, u8 mask) |
166 | { |
167 | u8 status; |
168 | int us; |
169 | int i; |
170 | |
171 | us = APPLESMC_MIN_WAIT; |
172 | for (i = 0; i < 24 ; i++) { |
173 | status = inb(APPLESMC_CMD_PORT); |
174 | if ((status & mask) == val) |
175 | return 0; |
176 | usleep_range(min: us, max: us * 2); |
177 | if (i > 9) |
178 | us <<= 1; |
179 | } |
180 | return -EIO; |
181 | } |
182 | |
183 | /* send_byte - Write to SMC data port. Callers must hold applesmc_lock. */ |
184 | |
185 | static int send_byte(u8 cmd, u16 port) |
186 | { |
187 | int status; |
188 | |
189 | status = wait_status(val: 0, SMC_STATUS_IB_CLOSED); |
190 | if (status) |
191 | return status; |
192 | /* |
193 | * This needs to be a separate read looking for bit 0x04 |
194 | * after bit 0x02 falls. If consolidated with the wait above |
195 | * this extra read may not happen if status returns both |
196 | * simultaneously and this would appear to be required. |
197 | */ |
198 | status = wait_status(SMC_STATUS_BUSY, SMC_STATUS_BUSY); |
199 | if (status) |
200 | return status; |
201 | |
202 | outb(value: cmd, port); |
203 | return 0; |
204 | } |
205 | |
206 | /* send_command - Write a command to the SMC. Callers must hold applesmc_lock. */ |
207 | |
208 | static int send_command(u8 cmd) |
209 | { |
210 | int ret; |
211 | |
212 | ret = wait_status(val: 0, SMC_STATUS_IB_CLOSED); |
213 | if (ret) |
214 | return ret; |
215 | outb(value: cmd, APPLESMC_CMD_PORT); |
216 | return 0; |
217 | } |
218 | |
219 | /* |
220 | * Based on logic from the Apple driver. This is issued before any interaction |
221 | * If busy is stuck high, issue a read command to reset the SMC state machine. |
222 | * If busy is stuck high after the command then the SMC is jammed. |
223 | */ |
224 | |
225 | static int smc_sane(void) |
226 | { |
227 | int ret; |
228 | |
229 | ret = wait_status(val: 0, SMC_STATUS_BUSY); |
230 | if (!ret) |
231 | return ret; |
232 | ret = send_command(APPLESMC_READ_CMD); |
233 | if (ret) |
234 | return ret; |
235 | return wait_status(val: 0, SMC_STATUS_BUSY); |
236 | } |
237 | |
238 | static int send_argument(const char *key) |
239 | { |
240 | int i; |
241 | |
242 | for (i = 0; i < 4; i++) |
243 | if (send_byte(cmd: key[i], APPLESMC_DATA_PORT)) |
244 | return -EIO; |
245 | return 0; |
246 | } |
247 | |
248 | static int read_smc(u8 cmd, const char *key, u8 *buffer, u8 len) |
249 | { |
250 | u8 status, data = 0; |
251 | int i; |
252 | int ret; |
253 | |
254 | ret = smc_sane(); |
255 | if (ret) |
256 | return ret; |
257 | |
258 | if (send_command(cmd) || send_argument(key)) { |
259 | pr_warn("%.4s: read arg fail\n" , key); |
260 | return -EIO; |
261 | } |
262 | |
263 | /* This has no effect on newer (2012) SMCs */ |
264 | if (send_byte(cmd: len, APPLESMC_DATA_PORT)) { |
265 | pr_warn("%.4s: read len fail\n" , key); |
266 | return -EIO; |
267 | } |
268 | |
269 | for (i = 0; i < len; i++) { |
270 | if (wait_status(SMC_STATUS_AWAITING_DATA | SMC_STATUS_BUSY, |
271 | SMC_STATUS_AWAITING_DATA | SMC_STATUS_BUSY)) { |
272 | pr_warn("%.4s: read data[%d] fail\n" , key, i); |
273 | return -EIO; |
274 | } |
275 | buffer[i] = inb(APPLESMC_DATA_PORT); |
276 | } |
277 | |
278 | /* Read the data port until bit0 is cleared */ |
279 | for (i = 0; i < 16; i++) { |
280 | udelay(APPLESMC_MIN_WAIT); |
281 | status = inb(APPLESMC_CMD_PORT); |
282 | if (!(status & SMC_STATUS_AWAITING_DATA)) |
283 | break; |
284 | data = inb(APPLESMC_DATA_PORT); |
285 | } |
286 | if (i) |
287 | pr_warn("flushed %d bytes, last value is: %d\n" , i, data); |
288 | |
289 | return wait_status(val: 0, SMC_STATUS_BUSY); |
290 | } |
291 | |
292 | static int write_smc(u8 cmd, const char *key, const u8 *buffer, u8 len) |
293 | { |
294 | int i; |
295 | int ret; |
296 | |
297 | ret = smc_sane(); |
298 | if (ret) |
299 | return ret; |
300 | |
301 | if (send_command(cmd) || send_argument(key)) { |
302 | pr_warn("%s: write arg fail\n" , key); |
303 | return -EIO; |
304 | } |
305 | |
306 | if (send_byte(cmd: len, APPLESMC_DATA_PORT)) { |
307 | pr_warn("%.4s: write len fail\n" , key); |
308 | return -EIO; |
309 | } |
310 | |
311 | for (i = 0; i < len; i++) { |
312 | if (send_byte(cmd: buffer[i], APPLESMC_DATA_PORT)) { |
313 | pr_warn("%s: write data fail\n" , key); |
314 | return -EIO; |
315 | } |
316 | } |
317 | |
318 | return wait_status(val: 0, SMC_STATUS_BUSY); |
319 | } |
320 | |
321 | static int read_register_count(unsigned int *count) |
322 | { |
323 | __be32 be; |
324 | int ret; |
325 | |
326 | ret = read_smc(APPLESMC_READ_CMD, KEY_COUNT_KEY, buffer: (u8 *)&be, len: 4); |
327 | if (ret) |
328 | return ret; |
329 | |
330 | *count = be32_to_cpu(be); |
331 | return 0; |
332 | } |
333 | |
334 | /* |
335 | * Serialized I/O |
336 | * |
337 | * Returns zero on success or a negative error on failure. |
338 | * All functions below are concurrency safe - callers should NOT hold lock. |
339 | */ |
340 | |
341 | static int applesmc_read_entry(const struct applesmc_entry *entry, |
342 | u8 *buf, u8 len) |
343 | { |
344 | int ret; |
345 | |
346 | if (entry->len != len) |
347 | return -EINVAL; |
348 | mutex_lock(&smcreg.mutex); |
349 | ret = read_smc(APPLESMC_READ_CMD, key: entry->key, buffer: buf, len); |
350 | mutex_unlock(lock: &smcreg.mutex); |
351 | |
352 | return ret; |
353 | } |
354 | |
355 | static int applesmc_write_entry(const struct applesmc_entry *entry, |
356 | const u8 *buf, u8 len) |
357 | { |
358 | int ret; |
359 | |
360 | if (entry->len != len) |
361 | return -EINVAL; |
362 | mutex_lock(&smcreg.mutex); |
363 | ret = write_smc(APPLESMC_WRITE_CMD, key: entry->key, buffer: buf, len); |
364 | mutex_unlock(lock: &smcreg.mutex); |
365 | return ret; |
366 | } |
367 | |
368 | static const struct applesmc_entry *applesmc_get_entry_by_index(int index) |
369 | { |
370 | struct applesmc_entry *cache = &smcreg.cache[index]; |
371 | u8 key[4], info[6]; |
372 | __be32 be; |
373 | int ret = 0; |
374 | |
375 | if (cache->valid) |
376 | return cache; |
377 | |
378 | mutex_lock(&smcreg.mutex); |
379 | |
380 | if (cache->valid) |
381 | goto out; |
382 | be = cpu_to_be32(index); |
383 | ret = read_smc(APPLESMC_GET_KEY_BY_INDEX_CMD, key: (u8 *)&be, buffer: key, len: 4); |
384 | if (ret) |
385 | goto out; |
386 | ret = read_smc(APPLESMC_GET_KEY_TYPE_CMD, key, buffer: info, len: 6); |
387 | if (ret) |
388 | goto out; |
389 | |
390 | memcpy(cache->key, key, 4); |
391 | cache->len = info[0]; |
392 | memcpy(cache->type, &info[1], 4); |
393 | cache->flags = info[5]; |
394 | cache->valid = true; |
395 | |
396 | out: |
397 | mutex_unlock(lock: &smcreg.mutex); |
398 | if (ret) |
399 | return ERR_PTR(error: ret); |
400 | return cache; |
401 | } |
402 | |
403 | static int applesmc_get_lower_bound(unsigned int *lo, const char *key) |
404 | { |
405 | int begin = 0, end = smcreg.key_count; |
406 | const struct applesmc_entry *entry; |
407 | |
408 | while (begin != end) { |
409 | int middle = begin + (end - begin) / 2; |
410 | entry = applesmc_get_entry_by_index(index: middle); |
411 | if (IS_ERR(ptr: entry)) { |
412 | *lo = 0; |
413 | return PTR_ERR(ptr: entry); |
414 | } |
415 | if (strcmp(entry->key, key) < 0) |
416 | begin = middle + 1; |
417 | else |
418 | end = middle; |
419 | } |
420 | |
421 | *lo = begin; |
422 | return 0; |
423 | } |
424 | |
425 | static int applesmc_get_upper_bound(unsigned int *hi, const char *key) |
426 | { |
427 | int begin = 0, end = smcreg.key_count; |
428 | const struct applesmc_entry *entry; |
429 | |
430 | while (begin != end) { |
431 | int middle = begin + (end - begin) / 2; |
432 | entry = applesmc_get_entry_by_index(index: middle); |
433 | if (IS_ERR(ptr: entry)) { |
434 | *hi = smcreg.key_count; |
435 | return PTR_ERR(ptr: entry); |
436 | } |
437 | if (strcmp(key, entry->key) < 0) |
438 | end = middle; |
439 | else |
440 | begin = middle + 1; |
441 | } |
442 | |
443 | *hi = begin; |
444 | return 0; |
445 | } |
446 | |
447 | static const struct applesmc_entry *applesmc_get_entry_by_key(const char *key) |
448 | { |
449 | int begin, end; |
450 | int ret; |
451 | |
452 | ret = applesmc_get_lower_bound(lo: &begin, key); |
453 | if (ret) |
454 | return ERR_PTR(error: ret); |
455 | ret = applesmc_get_upper_bound(hi: &end, key); |
456 | if (ret) |
457 | return ERR_PTR(error: ret); |
458 | if (end - begin != 1) |
459 | return ERR_PTR(error: -EINVAL); |
460 | |
461 | return applesmc_get_entry_by_index(index: begin); |
462 | } |
463 | |
464 | static int applesmc_read_key(const char *key, u8 *buffer, u8 len) |
465 | { |
466 | const struct applesmc_entry *entry; |
467 | |
468 | entry = applesmc_get_entry_by_key(key); |
469 | if (IS_ERR(ptr: entry)) |
470 | return PTR_ERR(ptr: entry); |
471 | |
472 | return applesmc_read_entry(entry, buf: buffer, len); |
473 | } |
474 | |
475 | static int applesmc_write_key(const char *key, const u8 *buffer, u8 len) |
476 | { |
477 | const struct applesmc_entry *entry; |
478 | |
479 | entry = applesmc_get_entry_by_key(key); |
480 | if (IS_ERR(ptr: entry)) |
481 | return PTR_ERR(ptr: entry); |
482 | |
483 | return applesmc_write_entry(entry, buf: buffer, len); |
484 | } |
485 | |
486 | static int applesmc_has_key(const char *key, bool *value) |
487 | { |
488 | const struct applesmc_entry *entry; |
489 | |
490 | entry = applesmc_get_entry_by_key(key); |
491 | if (IS_ERR(ptr: entry) && PTR_ERR(ptr: entry) != -EINVAL) |
492 | return PTR_ERR(ptr: entry); |
493 | |
494 | *value = !IS_ERR(ptr: entry); |
495 | return 0; |
496 | } |
497 | |
498 | /* |
499 | * applesmc_read_s16 - Read 16-bit signed big endian register |
500 | */ |
501 | static int applesmc_read_s16(const char *key, s16 *value) |
502 | { |
503 | u8 buffer[2]; |
504 | int ret; |
505 | |
506 | ret = applesmc_read_key(key, buffer, len: 2); |
507 | if (ret) |
508 | return ret; |
509 | |
510 | *value = ((s16)buffer[0] << 8) | buffer[1]; |
511 | return 0; |
512 | } |
513 | |
514 | /* |
515 | * applesmc_device_init - initialize the accelerometer. Can sleep. |
516 | */ |
517 | static void applesmc_device_init(void) |
518 | { |
519 | int total; |
520 | u8 buffer[2]; |
521 | |
522 | if (!smcreg.has_accelerometer) |
523 | return; |
524 | |
525 | for (total = INIT_TIMEOUT_MSECS; total > 0; total -= INIT_WAIT_MSECS) { |
526 | if (!applesmc_read_key(MOTION_SENSOR_KEY, buffer, len: 2) && |
527 | (buffer[0] != 0x00 || buffer[1] != 0x00)) |
528 | return; |
529 | buffer[0] = 0xe0; |
530 | buffer[1] = 0x00; |
531 | applesmc_write_key(MOTION_SENSOR_KEY, buffer, len: 2); |
532 | msleep(INIT_WAIT_MSECS); |
533 | } |
534 | |
535 | pr_warn("failed to init the device\n" ); |
536 | } |
537 | |
538 | static int applesmc_init_index(struct applesmc_registers *s) |
539 | { |
540 | const struct applesmc_entry *entry; |
541 | unsigned int i; |
542 | |
543 | if (s->index) |
544 | return 0; |
545 | |
546 | s->index = kcalloc(n: s->temp_count, size: sizeof(s->index[0]), GFP_KERNEL); |
547 | if (!s->index) |
548 | return -ENOMEM; |
549 | |
550 | for (i = s->temp_begin; i < s->temp_end; i++) { |
551 | entry = applesmc_get_entry_by_index(index: i); |
552 | if (IS_ERR(ptr: entry)) |
553 | continue; |
554 | if (strcmp(entry->type, TEMP_SENSOR_TYPE)) |
555 | continue; |
556 | s->index[s->index_count++] = entry->key; |
557 | } |
558 | |
559 | return 0; |
560 | } |
561 | |
562 | /* |
563 | * applesmc_init_smcreg_try - Try to initialize register cache. Idempotent. |
564 | */ |
565 | static int applesmc_init_smcreg_try(void) |
566 | { |
567 | struct applesmc_registers *s = &smcreg; |
568 | bool left_light_sensor = false, right_light_sensor = false; |
569 | unsigned int count; |
570 | u8 tmp[1]; |
571 | int ret; |
572 | |
573 | if (s->init_complete) |
574 | return 0; |
575 | |
576 | ret = read_register_count(count: &count); |
577 | if (ret) |
578 | return ret; |
579 | |
580 | if (s->cache && s->key_count != count) { |
581 | pr_warn("key count changed from %d to %d\n" , |
582 | s->key_count, count); |
583 | kfree(objp: s->cache); |
584 | s->cache = NULL; |
585 | } |
586 | s->key_count = count; |
587 | |
588 | if (!s->cache) |
589 | s->cache = kcalloc(n: s->key_count, size: sizeof(*s->cache), GFP_KERNEL); |
590 | if (!s->cache) |
591 | return -ENOMEM; |
592 | |
593 | ret = applesmc_read_key(FANS_COUNT, buffer: tmp, len: 1); |
594 | if (ret) |
595 | return ret; |
596 | s->fan_count = tmp[0]; |
597 | if (s->fan_count > 10) |
598 | s->fan_count = 10; |
599 | |
600 | ret = applesmc_get_lower_bound(lo: &s->temp_begin, key: "T" ); |
601 | if (ret) |
602 | return ret; |
603 | ret = applesmc_get_lower_bound(lo: &s->temp_end, key: "U" ); |
604 | if (ret) |
605 | return ret; |
606 | s->temp_count = s->temp_end - s->temp_begin; |
607 | |
608 | ret = applesmc_init_index(s); |
609 | if (ret) |
610 | return ret; |
611 | |
612 | ret = applesmc_has_key(LIGHT_SENSOR_LEFT_KEY, value: &left_light_sensor); |
613 | if (ret) |
614 | return ret; |
615 | ret = applesmc_has_key(LIGHT_SENSOR_RIGHT_KEY, value: &right_light_sensor); |
616 | if (ret) |
617 | return ret; |
618 | ret = applesmc_has_key(MOTION_SENSOR_KEY, value: &s->has_accelerometer); |
619 | if (ret) |
620 | return ret; |
621 | ret = applesmc_has_key(BACKLIGHT_KEY, value: &s->has_key_backlight); |
622 | if (ret) |
623 | return ret; |
624 | |
625 | s->num_light_sensors = left_light_sensor + right_light_sensor; |
626 | s->init_complete = true; |
627 | |
628 | pr_info("key=%d fan=%d temp=%d index=%d acc=%d lux=%d kbd=%d\n" , |
629 | s->key_count, s->fan_count, s->temp_count, s->index_count, |
630 | s->has_accelerometer, |
631 | s->num_light_sensors, |
632 | s->has_key_backlight); |
633 | |
634 | return 0; |
635 | } |
636 | |
637 | static void applesmc_destroy_smcreg(void) |
638 | { |
639 | kfree(objp: smcreg.index); |
640 | smcreg.index = NULL; |
641 | kfree(objp: smcreg.cache); |
642 | smcreg.cache = NULL; |
643 | smcreg.init_complete = false; |
644 | } |
645 | |
646 | /* |
647 | * applesmc_init_smcreg - Initialize register cache. |
648 | * |
649 | * Retries until initialization is successful, or the operation times out. |
650 | * |
651 | */ |
652 | static int applesmc_init_smcreg(void) |
653 | { |
654 | int ms, ret; |
655 | |
656 | for (ms = 0; ms < INIT_TIMEOUT_MSECS; ms += INIT_WAIT_MSECS) { |
657 | ret = applesmc_init_smcreg_try(); |
658 | if (!ret) { |
659 | if (ms) |
660 | pr_info("init_smcreg() took %d ms\n" , ms); |
661 | return 0; |
662 | } |
663 | msleep(INIT_WAIT_MSECS); |
664 | } |
665 | |
666 | applesmc_destroy_smcreg(); |
667 | |
668 | return ret; |
669 | } |
670 | |
671 | /* Device model stuff */ |
672 | static int applesmc_probe(struct platform_device *dev) |
673 | { |
674 | int ret; |
675 | |
676 | ret = applesmc_init_smcreg(); |
677 | if (ret) |
678 | return ret; |
679 | |
680 | applesmc_device_init(); |
681 | |
682 | return 0; |
683 | } |
684 | |
685 | /* Synchronize device with memorized backlight state */ |
686 | static int applesmc_pm_resume(struct device *dev) |
687 | { |
688 | if (smcreg.has_key_backlight) |
689 | applesmc_write_key(BACKLIGHT_KEY, buffer: backlight_state, len: 2); |
690 | return 0; |
691 | } |
692 | |
693 | /* Reinitialize device on resume from hibernation */ |
694 | static int applesmc_pm_restore(struct device *dev) |
695 | { |
696 | applesmc_device_init(); |
697 | return applesmc_pm_resume(dev); |
698 | } |
699 | |
700 | static const struct dev_pm_ops applesmc_pm_ops = { |
701 | .resume = applesmc_pm_resume, |
702 | .restore = applesmc_pm_restore, |
703 | }; |
704 | |
705 | static struct platform_driver applesmc_driver = { |
706 | .probe = applesmc_probe, |
707 | .driver = { |
708 | .name = "applesmc" , |
709 | .pm = &applesmc_pm_ops, |
710 | }, |
711 | }; |
712 | |
713 | /* |
714 | * applesmc_calibrate - Set our "resting" values. Callers must |
715 | * hold applesmc_lock. |
716 | */ |
717 | static void applesmc_calibrate(void) |
718 | { |
719 | applesmc_read_s16(MOTION_SENSOR_X_KEY, value: &rest_x); |
720 | applesmc_read_s16(MOTION_SENSOR_Y_KEY, value: &rest_y); |
721 | rest_x = -rest_x; |
722 | } |
723 | |
724 | static void applesmc_idev_poll(struct input_dev *idev) |
725 | { |
726 | s16 x, y; |
727 | |
728 | if (applesmc_read_s16(MOTION_SENSOR_X_KEY, value: &x)) |
729 | return; |
730 | if (applesmc_read_s16(MOTION_SENSOR_Y_KEY, value: &y)) |
731 | return; |
732 | |
733 | x = -x; |
734 | input_report_abs(dev: idev, ABS_X, value: x - rest_x); |
735 | input_report_abs(dev: idev, ABS_Y, value: y - rest_y); |
736 | input_sync(dev: idev); |
737 | } |
738 | |
739 | /* Sysfs Files */ |
740 | |
741 | static ssize_t applesmc_name_show(struct device *dev, |
742 | struct device_attribute *attr, char *buf) |
743 | { |
744 | return sysfs_emit(buf, fmt: "applesmc\n" ); |
745 | } |
746 | |
747 | static ssize_t applesmc_position_show(struct device *dev, |
748 | struct device_attribute *attr, char *buf) |
749 | { |
750 | int ret; |
751 | s16 x, y, z; |
752 | |
753 | ret = applesmc_read_s16(MOTION_SENSOR_X_KEY, value: &x); |
754 | if (ret) |
755 | goto out; |
756 | ret = applesmc_read_s16(MOTION_SENSOR_Y_KEY, value: &y); |
757 | if (ret) |
758 | goto out; |
759 | ret = applesmc_read_s16(MOTION_SENSOR_Z_KEY, value: &z); |
760 | if (ret) |
761 | goto out; |
762 | |
763 | out: |
764 | if (ret) |
765 | return ret; |
766 | |
767 | return sysfs_emit(buf, fmt: "(%d,%d,%d)\n" , x, y, z); |
768 | } |
769 | |
770 | static ssize_t applesmc_light_show(struct device *dev, |
771 | struct device_attribute *attr, char *sysfsbuf) |
772 | { |
773 | const struct applesmc_entry *entry; |
774 | static int data_length; |
775 | int ret; |
776 | u8 left = 0, right = 0; |
777 | u8 buffer[10]; |
778 | |
779 | if (!data_length) { |
780 | entry = applesmc_get_entry_by_key(LIGHT_SENSOR_LEFT_KEY); |
781 | if (IS_ERR(ptr: entry)) |
782 | return PTR_ERR(ptr: entry); |
783 | if (entry->len > 10) |
784 | return -ENXIO; |
785 | data_length = entry->len; |
786 | pr_info("light sensor data length set to %d\n" , data_length); |
787 | } |
788 | |
789 | ret = applesmc_read_key(LIGHT_SENSOR_LEFT_KEY, buffer, len: data_length); |
790 | if (ret) |
791 | goto out; |
792 | /* newer macbooks report a single 10-bit bigendian value */ |
793 | if (data_length == 10) { |
794 | left = be16_to_cpu(*(__be16 *)(buffer + 6)) >> 2; |
795 | goto out; |
796 | } |
797 | left = buffer[2]; |
798 | |
799 | ret = applesmc_read_key(LIGHT_SENSOR_RIGHT_KEY, buffer, len: data_length); |
800 | if (ret) |
801 | goto out; |
802 | right = buffer[2]; |
803 | |
804 | out: |
805 | if (ret) |
806 | return ret; |
807 | |
808 | return sysfs_emit(buf: sysfsbuf, fmt: "(%d,%d)\n" , left, right); |
809 | } |
810 | |
811 | /* Displays sensor key as label */ |
812 | static ssize_t applesmc_show_sensor_label(struct device *dev, |
813 | struct device_attribute *devattr, char *sysfsbuf) |
814 | { |
815 | const char *key = smcreg.index[to_index(devattr)]; |
816 | |
817 | return sysfs_emit(buf: sysfsbuf, fmt: "%s\n" , key); |
818 | } |
819 | |
820 | /* Displays degree Celsius * 1000 */ |
821 | static ssize_t applesmc_show_temperature(struct device *dev, |
822 | struct device_attribute *devattr, char *sysfsbuf) |
823 | { |
824 | const char *key = smcreg.index[to_index(devattr)]; |
825 | int ret; |
826 | s16 value; |
827 | int temp; |
828 | |
829 | ret = applesmc_read_s16(key, value: &value); |
830 | if (ret) |
831 | return ret; |
832 | |
833 | temp = 250 * (value >> 6); |
834 | |
835 | return sysfs_emit(buf: sysfsbuf, fmt: "%d\n" , temp); |
836 | } |
837 | |
838 | static ssize_t applesmc_show_fan_speed(struct device *dev, |
839 | struct device_attribute *attr, char *sysfsbuf) |
840 | { |
841 | int ret; |
842 | unsigned int speed = 0; |
843 | char newkey[5]; |
844 | u8 buffer[2]; |
845 | |
846 | scnprintf(buf: newkey, size: sizeof(newkey), fmt: fan_speed_fmt[to_option(attr)], |
847 | to_index(attr)); |
848 | |
849 | ret = applesmc_read_key(key: newkey, buffer, len: 2); |
850 | if (ret) |
851 | return ret; |
852 | |
853 | speed = ((buffer[0] << 8 | buffer[1]) >> 2); |
854 | return sysfs_emit(buf: sysfsbuf, fmt: "%u\n" , speed); |
855 | } |
856 | |
857 | static ssize_t applesmc_store_fan_speed(struct device *dev, |
858 | struct device_attribute *attr, |
859 | const char *sysfsbuf, size_t count) |
860 | { |
861 | int ret; |
862 | unsigned long speed; |
863 | char newkey[5]; |
864 | u8 buffer[2]; |
865 | |
866 | if (kstrtoul(s: sysfsbuf, base: 10, res: &speed) < 0 || speed >= 0x4000) |
867 | return -EINVAL; /* Bigger than a 14-bit value */ |
868 | |
869 | scnprintf(buf: newkey, size: sizeof(newkey), fmt: fan_speed_fmt[to_option(attr)], |
870 | to_index(attr)); |
871 | |
872 | buffer[0] = (speed >> 6) & 0xff; |
873 | buffer[1] = (speed << 2) & 0xff; |
874 | ret = applesmc_write_key(key: newkey, buffer, len: 2); |
875 | |
876 | if (ret) |
877 | return ret; |
878 | else |
879 | return count; |
880 | } |
881 | |
882 | static ssize_t applesmc_show_fan_manual(struct device *dev, |
883 | struct device_attribute *attr, char *sysfsbuf) |
884 | { |
885 | int ret; |
886 | u16 manual = 0; |
887 | u8 buffer[2]; |
888 | |
889 | ret = applesmc_read_key(FANS_MANUAL, buffer, len: 2); |
890 | if (ret) |
891 | return ret; |
892 | |
893 | manual = ((buffer[0] << 8 | buffer[1]) >> to_index(attr)) & 0x01; |
894 | return sysfs_emit(buf: sysfsbuf, fmt: "%d\n" , manual); |
895 | } |
896 | |
897 | static ssize_t applesmc_store_fan_manual(struct device *dev, |
898 | struct device_attribute *attr, |
899 | const char *sysfsbuf, size_t count) |
900 | { |
901 | int ret; |
902 | u8 buffer[2]; |
903 | unsigned long input; |
904 | u16 val; |
905 | |
906 | if (kstrtoul(s: sysfsbuf, base: 10, res: &input) < 0) |
907 | return -EINVAL; |
908 | |
909 | ret = applesmc_read_key(FANS_MANUAL, buffer, len: 2); |
910 | if (ret) |
911 | goto out; |
912 | |
913 | val = (buffer[0] << 8 | buffer[1]); |
914 | |
915 | if (input) |
916 | val = val | (0x01 << to_index(attr)); |
917 | else |
918 | val = val & ~(0x01 << to_index(attr)); |
919 | |
920 | buffer[0] = (val >> 8) & 0xFF; |
921 | buffer[1] = val & 0xFF; |
922 | |
923 | ret = applesmc_write_key(FANS_MANUAL, buffer, len: 2); |
924 | |
925 | out: |
926 | if (ret) |
927 | return ret; |
928 | else |
929 | return count; |
930 | } |
931 | |
932 | static ssize_t applesmc_show_fan_position(struct device *dev, |
933 | struct device_attribute *attr, char *sysfsbuf) |
934 | { |
935 | int ret; |
936 | char newkey[5]; |
937 | u8 buffer[17]; |
938 | |
939 | scnprintf(buf: newkey, size: sizeof(newkey), FAN_ID_FMT, to_index(attr)); |
940 | |
941 | ret = applesmc_read_key(key: newkey, buffer, len: 16); |
942 | buffer[16] = 0; |
943 | |
944 | if (ret) |
945 | return ret; |
946 | |
947 | return sysfs_emit(buf: sysfsbuf, fmt: "%s\n" , buffer + 4); |
948 | } |
949 | |
950 | static ssize_t applesmc_calibrate_show(struct device *dev, |
951 | struct device_attribute *attr, char *sysfsbuf) |
952 | { |
953 | return sysfs_emit(buf: sysfsbuf, fmt: "(%d,%d)\n" , rest_x, rest_y); |
954 | } |
955 | |
956 | static ssize_t applesmc_calibrate_store(struct device *dev, |
957 | struct device_attribute *attr, const char *sysfsbuf, size_t count) |
958 | { |
959 | applesmc_calibrate(); |
960 | |
961 | return count; |
962 | } |
963 | |
964 | static void applesmc_backlight_set(struct work_struct *work) |
965 | { |
966 | applesmc_write_key(BACKLIGHT_KEY, buffer: backlight_state, len: 2); |
967 | } |
968 | static DECLARE_WORK(backlight_work, &applesmc_backlight_set); |
969 | |
970 | static void applesmc_brightness_set(struct led_classdev *led_cdev, |
971 | enum led_brightness value) |
972 | { |
973 | int ret; |
974 | |
975 | backlight_state[0] = value; |
976 | ret = queue_work(wq: applesmc_led_wq, work: &backlight_work); |
977 | |
978 | if (debug && (!ret)) |
979 | dev_dbg(led_cdev->dev, "work was already on the queue.\n" ); |
980 | } |
981 | |
982 | static ssize_t applesmc_key_count_show(struct device *dev, |
983 | struct device_attribute *attr, char *sysfsbuf) |
984 | { |
985 | int ret; |
986 | u8 buffer[4]; |
987 | u32 count; |
988 | |
989 | ret = applesmc_read_key(KEY_COUNT_KEY, buffer, len: 4); |
990 | if (ret) |
991 | return ret; |
992 | |
993 | count = ((u32)buffer[0]<<24) + ((u32)buffer[1]<<16) + |
994 | ((u32)buffer[2]<<8) + buffer[3]; |
995 | return sysfs_emit(buf: sysfsbuf, fmt: "%d\n" , count); |
996 | } |
997 | |
998 | static ssize_t applesmc_key_at_index_read_show(struct device *dev, |
999 | struct device_attribute *attr, char *sysfsbuf) |
1000 | { |
1001 | const struct applesmc_entry *entry; |
1002 | int ret; |
1003 | |
1004 | entry = applesmc_get_entry_by_index(index: key_at_index); |
1005 | if (IS_ERR(ptr: entry)) |
1006 | return PTR_ERR(ptr: entry); |
1007 | ret = applesmc_read_entry(entry, buf: sysfsbuf, len: entry->len); |
1008 | if (ret) |
1009 | return ret; |
1010 | |
1011 | return entry->len; |
1012 | } |
1013 | |
1014 | static ssize_t applesmc_key_at_index_data_length_show(struct device *dev, |
1015 | struct device_attribute *attr, char *sysfsbuf) |
1016 | { |
1017 | const struct applesmc_entry *entry; |
1018 | |
1019 | entry = applesmc_get_entry_by_index(index: key_at_index); |
1020 | if (IS_ERR(ptr: entry)) |
1021 | return PTR_ERR(ptr: entry); |
1022 | |
1023 | return sysfs_emit(buf: sysfsbuf, fmt: "%d\n" , entry->len); |
1024 | } |
1025 | |
1026 | static ssize_t applesmc_key_at_index_type_show(struct device *dev, |
1027 | struct device_attribute *attr, char *sysfsbuf) |
1028 | { |
1029 | const struct applesmc_entry *entry; |
1030 | |
1031 | entry = applesmc_get_entry_by_index(index: key_at_index); |
1032 | if (IS_ERR(ptr: entry)) |
1033 | return PTR_ERR(ptr: entry); |
1034 | |
1035 | return sysfs_emit(buf: sysfsbuf, fmt: "%s\n" , entry->type); |
1036 | } |
1037 | |
1038 | static ssize_t applesmc_key_at_index_name_show(struct device *dev, |
1039 | struct device_attribute *attr, char *sysfsbuf) |
1040 | { |
1041 | const struct applesmc_entry *entry; |
1042 | |
1043 | entry = applesmc_get_entry_by_index(index: key_at_index); |
1044 | if (IS_ERR(ptr: entry)) |
1045 | return PTR_ERR(ptr: entry); |
1046 | |
1047 | return sysfs_emit(buf: sysfsbuf, fmt: "%s\n" , entry->key); |
1048 | } |
1049 | |
1050 | static ssize_t applesmc_key_at_index_show(struct device *dev, |
1051 | struct device_attribute *attr, char *sysfsbuf) |
1052 | { |
1053 | return sysfs_emit(buf: sysfsbuf, fmt: "%d\n" , key_at_index); |
1054 | } |
1055 | |
1056 | static ssize_t applesmc_key_at_index_store(struct device *dev, |
1057 | struct device_attribute *attr, const char *sysfsbuf, size_t count) |
1058 | { |
1059 | unsigned long newkey; |
1060 | |
1061 | if (kstrtoul(s: sysfsbuf, base: 10, res: &newkey) < 0 |
1062 | || newkey >= smcreg.key_count) |
1063 | return -EINVAL; |
1064 | |
1065 | key_at_index = newkey; |
1066 | return count; |
1067 | } |
1068 | |
1069 | static struct led_classdev applesmc_backlight = { |
1070 | .name = "smc::kbd_backlight" , |
1071 | .default_trigger = "nand-disk" , |
1072 | .brightness_set = applesmc_brightness_set, |
1073 | }; |
1074 | |
1075 | static struct applesmc_node_group info_group[] = { |
1076 | { "name" , applesmc_name_show }, |
1077 | { "key_count" , applesmc_key_count_show }, |
1078 | { "key_at_index" , applesmc_key_at_index_show, applesmc_key_at_index_store }, |
1079 | { "key_at_index_name" , applesmc_key_at_index_name_show }, |
1080 | { "key_at_index_type" , applesmc_key_at_index_type_show }, |
1081 | { "key_at_index_data_length" , applesmc_key_at_index_data_length_show }, |
1082 | { "key_at_index_data" , applesmc_key_at_index_read_show }, |
1083 | { } |
1084 | }; |
1085 | |
1086 | static struct applesmc_node_group accelerometer_group[] = { |
1087 | { "position" , applesmc_position_show }, |
1088 | { "calibrate" , applesmc_calibrate_show, applesmc_calibrate_store }, |
1089 | { } |
1090 | }; |
1091 | |
1092 | static struct applesmc_node_group light_sensor_group[] = { |
1093 | { "light" , applesmc_light_show }, |
1094 | { } |
1095 | }; |
1096 | |
1097 | static struct applesmc_node_group fan_group[] = { |
1098 | { "fan%d_label" , applesmc_show_fan_position }, |
1099 | { "fan%d_input" , applesmc_show_fan_speed, NULL, 0 }, |
1100 | { "fan%d_min" , applesmc_show_fan_speed, applesmc_store_fan_speed, 1 }, |
1101 | { "fan%d_max" , applesmc_show_fan_speed, NULL, 2 }, |
1102 | { "fan%d_safe" , applesmc_show_fan_speed, NULL, 3 }, |
1103 | { "fan%d_output" , applesmc_show_fan_speed, applesmc_store_fan_speed, 4 }, |
1104 | { "fan%d_manual" , applesmc_show_fan_manual, applesmc_store_fan_manual }, |
1105 | { } |
1106 | }; |
1107 | |
1108 | static struct applesmc_node_group temp_group[] = { |
1109 | { "temp%d_label" , applesmc_show_sensor_label }, |
1110 | { "temp%d_input" , applesmc_show_temperature }, |
1111 | { } |
1112 | }; |
1113 | |
1114 | /* Module stuff */ |
1115 | |
1116 | /* |
1117 | * applesmc_destroy_nodes - remove files and free associated memory |
1118 | */ |
1119 | static void applesmc_destroy_nodes(struct applesmc_node_group *groups) |
1120 | { |
1121 | struct applesmc_node_group *grp; |
1122 | struct applesmc_dev_attr *node; |
1123 | |
1124 | for (grp = groups; grp->nodes; grp++) { |
1125 | for (node = grp->nodes; node->sda.dev_attr.attr.name; node++) |
1126 | sysfs_remove_file(kobj: &pdev->dev.kobj, |
1127 | attr: &node->sda.dev_attr.attr); |
1128 | kfree(objp: grp->nodes); |
1129 | grp->nodes = NULL; |
1130 | } |
1131 | } |
1132 | |
1133 | /* |
1134 | * applesmc_create_nodes - create a two-dimensional group of sysfs files |
1135 | */ |
1136 | static int applesmc_create_nodes(struct applesmc_node_group *groups, int num) |
1137 | { |
1138 | struct applesmc_node_group *grp; |
1139 | struct applesmc_dev_attr *node; |
1140 | struct attribute *attr; |
1141 | int ret, i; |
1142 | |
1143 | for (grp = groups; grp->format; grp++) { |
1144 | grp->nodes = kcalloc(n: num + 1, size: sizeof(*node), GFP_KERNEL); |
1145 | if (!grp->nodes) { |
1146 | ret = -ENOMEM; |
1147 | goto out; |
1148 | } |
1149 | for (i = 0; i < num; i++) { |
1150 | node = &grp->nodes[i]; |
1151 | scnprintf(buf: node->name, size: sizeof(node->name), fmt: grp->format, |
1152 | i + 1); |
1153 | node->sda.index = (grp->option << 16) | (i & 0xffff); |
1154 | node->sda.dev_attr.show = grp->show; |
1155 | node->sda.dev_attr.store = grp->store; |
1156 | attr = &node->sda.dev_attr.attr; |
1157 | sysfs_attr_init(attr); |
1158 | attr->name = node->name; |
1159 | attr->mode = 0444 | (grp->store ? 0200 : 0); |
1160 | ret = sysfs_create_file(kobj: &pdev->dev.kobj, attr); |
1161 | if (ret) { |
1162 | attr->name = NULL; |
1163 | goto out; |
1164 | } |
1165 | } |
1166 | } |
1167 | |
1168 | return 0; |
1169 | out: |
1170 | applesmc_destroy_nodes(groups); |
1171 | return ret; |
1172 | } |
1173 | |
1174 | /* Create accelerometer resources */ |
1175 | static int applesmc_create_accelerometer(void) |
1176 | { |
1177 | int ret; |
1178 | |
1179 | if (!smcreg.has_accelerometer) |
1180 | return 0; |
1181 | |
1182 | ret = applesmc_create_nodes(groups: accelerometer_group, num: 1); |
1183 | if (ret) |
1184 | goto out; |
1185 | |
1186 | applesmc_idev = input_allocate_device(); |
1187 | if (!applesmc_idev) { |
1188 | ret = -ENOMEM; |
1189 | goto out_sysfs; |
1190 | } |
1191 | |
1192 | /* initial calibrate for the input device */ |
1193 | applesmc_calibrate(); |
1194 | |
1195 | /* initialize the input device */ |
1196 | applesmc_idev->name = "applesmc" ; |
1197 | applesmc_idev->id.bustype = BUS_HOST; |
1198 | applesmc_idev->dev.parent = &pdev->dev; |
1199 | input_set_abs_params(dev: applesmc_idev, ABS_X, |
1200 | min: -256, max: 256, APPLESMC_INPUT_FUZZ, APPLESMC_INPUT_FLAT); |
1201 | input_set_abs_params(dev: applesmc_idev, ABS_Y, |
1202 | min: -256, max: 256, APPLESMC_INPUT_FUZZ, APPLESMC_INPUT_FLAT); |
1203 | |
1204 | ret = input_setup_polling(dev: applesmc_idev, poll_fn: applesmc_idev_poll); |
1205 | if (ret) |
1206 | goto out_idev; |
1207 | |
1208 | input_set_poll_interval(dev: applesmc_idev, APPLESMC_POLL_INTERVAL); |
1209 | |
1210 | ret = input_register_device(applesmc_idev); |
1211 | if (ret) |
1212 | goto out_idev; |
1213 | |
1214 | return 0; |
1215 | |
1216 | out_idev: |
1217 | input_free_device(dev: applesmc_idev); |
1218 | |
1219 | out_sysfs: |
1220 | applesmc_destroy_nodes(groups: accelerometer_group); |
1221 | |
1222 | out: |
1223 | pr_warn("driver init failed (ret=%d)!\n" , ret); |
1224 | return ret; |
1225 | } |
1226 | |
1227 | /* Release all resources used by the accelerometer */ |
1228 | static void applesmc_release_accelerometer(void) |
1229 | { |
1230 | if (!smcreg.has_accelerometer) |
1231 | return; |
1232 | input_unregister_device(applesmc_idev); |
1233 | applesmc_destroy_nodes(groups: accelerometer_group); |
1234 | } |
1235 | |
1236 | static int applesmc_create_light_sensor(void) |
1237 | { |
1238 | if (!smcreg.num_light_sensors) |
1239 | return 0; |
1240 | return applesmc_create_nodes(groups: light_sensor_group, num: 1); |
1241 | } |
1242 | |
1243 | static void applesmc_release_light_sensor(void) |
1244 | { |
1245 | if (!smcreg.num_light_sensors) |
1246 | return; |
1247 | applesmc_destroy_nodes(groups: light_sensor_group); |
1248 | } |
1249 | |
1250 | static int applesmc_create_key_backlight(void) |
1251 | { |
1252 | if (!smcreg.has_key_backlight) |
1253 | return 0; |
1254 | applesmc_led_wq = create_singlethread_workqueue("applesmc-led" ); |
1255 | if (!applesmc_led_wq) |
1256 | return -ENOMEM; |
1257 | return led_classdev_register(parent: &pdev->dev, led_cdev: &applesmc_backlight); |
1258 | } |
1259 | |
1260 | static void applesmc_release_key_backlight(void) |
1261 | { |
1262 | if (!smcreg.has_key_backlight) |
1263 | return; |
1264 | led_classdev_unregister(led_cdev: &applesmc_backlight); |
1265 | destroy_workqueue(wq: applesmc_led_wq); |
1266 | } |
1267 | |
1268 | static int applesmc_dmi_match(const struct dmi_system_id *id) |
1269 | { |
1270 | return 1; |
1271 | } |
1272 | |
1273 | /* |
1274 | * Note that DMI_MATCH(...,"MacBook") will match "MacBookPro1,1". |
1275 | * So we need to put "Apple MacBook Pro" before "Apple MacBook". |
1276 | */ |
1277 | static const struct dmi_system_id applesmc_whitelist[] __initconst = { |
1278 | { applesmc_dmi_match, "Apple MacBook Air" , { |
1279 | DMI_MATCH(DMI_BOARD_VENDOR, "Apple" ), |
1280 | DMI_MATCH(DMI_PRODUCT_NAME, "MacBookAir" ) }, |
1281 | }, |
1282 | { applesmc_dmi_match, "Apple MacBook Pro" , { |
1283 | DMI_MATCH(DMI_BOARD_VENDOR, "Apple" ), |
1284 | DMI_MATCH(DMI_PRODUCT_NAME, "MacBookPro" ) }, |
1285 | }, |
1286 | { applesmc_dmi_match, "Apple MacBook" , { |
1287 | DMI_MATCH(DMI_BOARD_VENDOR, "Apple" ), |
1288 | DMI_MATCH(DMI_PRODUCT_NAME, "MacBook" ) }, |
1289 | }, |
1290 | { applesmc_dmi_match, "Apple Macmini" , { |
1291 | DMI_MATCH(DMI_BOARD_VENDOR, "Apple" ), |
1292 | DMI_MATCH(DMI_PRODUCT_NAME, "Macmini" ) }, |
1293 | }, |
1294 | { applesmc_dmi_match, "Apple MacPro" , { |
1295 | DMI_MATCH(DMI_BOARD_VENDOR, "Apple" ), |
1296 | DMI_MATCH(DMI_PRODUCT_NAME, "MacPro" ) }, |
1297 | }, |
1298 | { applesmc_dmi_match, "Apple iMac" , { |
1299 | DMI_MATCH(DMI_BOARD_VENDOR, "Apple" ), |
1300 | DMI_MATCH(DMI_PRODUCT_NAME, "iMac" ) }, |
1301 | }, |
1302 | { applesmc_dmi_match, "Apple Xserve" , { |
1303 | DMI_MATCH(DMI_BOARD_VENDOR, "Apple" ), |
1304 | DMI_MATCH(DMI_PRODUCT_NAME, "Xserve" ) }, |
1305 | }, |
1306 | { .ident = NULL } |
1307 | }; |
1308 | |
1309 | static int __init applesmc_init(void) |
1310 | { |
1311 | int ret; |
1312 | |
1313 | if (!dmi_check_system(list: applesmc_whitelist)) { |
1314 | pr_warn("supported laptop not found!\n" ); |
1315 | ret = -ENODEV; |
1316 | goto out; |
1317 | } |
1318 | |
1319 | if (!request_region(APPLESMC_DATA_PORT, APPLESMC_NR_PORTS, |
1320 | "applesmc" )) { |
1321 | ret = -ENXIO; |
1322 | goto out; |
1323 | } |
1324 | |
1325 | ret = platform_driver_register(&applesmc_driver); |
1326 | if (ret) |
1327 | goto out_region; |
1328 | |
1329 | pdev = platform_device_register_simple(name: "applesmc" , APPLESMC_DATA_PORT, |
1330 | NULL, num: 0); |
1331 | if (IS_ERR(ptr: pdev)) { |
1332 | ret = PTR_ERR(ptr: pdev); |
1333 | goto out_driver; |
1334 | } |
1335 | |
1336 | /* create register cache */ |
1337 | ret = applesmc_init_smcreg(); |
1338 | if (ret) |
1339 | goto out_device; |
1340 | |
1341 | ret = applesmc_create_nodes(groups: info_group, num: 1); |
1342 | if (ret) |
1343 | goto out_smcreg; |
1344 | |
1345 | ret = applesmc_create_nodes(groups: fan_group, num: smcreg.fan_count); |
1346 | if (ret) |
1347 | goto out_info; |
1348 | |
1349 | ret = applesmc_create_nodes(groups: temp_group, num: smcreg.index_count); |
1350 | if (ret) |
1351 | goto out_fans; |
1352 | |
1353 | ret = applesmc_create_accelerometer(); |
1354 | if (ret) |
1355 | goto out_temperature; |
1356 | |
1357 | ret = applesmc_create_light_sensor(); |
1358 | if (ret) |
1359 | goto out_accelerometer; |
1360 | |
1361 | ret = applesmc_create_key_backlight(); |
1362 | if (ret) |
1363 | goto out_light_sysfs; |
1364 | |
1365 | hwmon_dev = hwmon_device_register(dev: &pdev->dev); |
1366 | if (IS_ERR(ptr: hwmon_dev)) { |
1367 | ret = PTR_ERR(ptr: hwmon_dev); |
1368 | goto out_light_ledclass; |
1369 | } |
1370 | |
1371 | return 0; |
1372 | |
1373 | out_light_ledclass: |
1374 | applesmc_release_key_backlight(); |
1375 | out_light_sysfs: |
1376 | applesmc_release_light_sensor(); |
1377 | out_accelerometer: |
1378 | applesmc_release_accelerometer(); |
1379 | out_temperature: |
1380 | applesmc_destroy_nodes(groups: temp_group); |
1381 | out_fans: |
1382 | applesmc_destroy_nodes(groups: fan_group); |
1383 | out_info: |
1384 | applesmc_destroy_nodes(groups: info_group); |
1385 | out_smcreg: |
1386 | applesmc_destroy_smcreg(); |
1387 | out_device: |
1388 | platform_device_unregister(pdev); |
1389 | out_driver: |
1390 | platform_driver_unregister(&applesmc_driver); |
1391 | out_region: |
1392 | release_region(APPLESMC_DATA_PORT, APPLESMC_NR_PORTS); |
1393 | out: |
1394 | pr_warn("driver init failed (ret=%d)!\n" , ret); |
1395 | return ret; |
1396 | } |
1397 | |
1398 | static void __exit applesmc_exit(void) |
1399 | { |
1400 | hwmon_device_unregister(dev: hwmon_dev); |
1401 | applesmc_release_key_backlight(); |
1402 | applesmc_release_light_sensor(); |
1403 | applesmc_release_accelerometer(); |
1404 | applesmc_destroy_nodes(groups: temp_group); |
1405 | applesmc_destroy_nodes(groups: fan_group); |
1406 | applesmc_destroy_nodes(groups: info_group); |
1407 | applesmc_destroy_smcreg(); |
1408 | platform_device_unregister(pdev); |
1409 | platform_driver_unregister(&applesmc_driver); |
1410 | release_region(APPLESMC_DATA_PORT, APPLESMC_NR_PORTS); |
1411 | } |
1412 | |
1413 | module_init(applesmc_init); |
1414 | module_exit(applesmc_exit); |
1415 | |
1416 | MODULE_AUTHOR("Nicolas Boichat" ); |
1417 | MODULE_DESCRIPTION("Apple SMC" ); |
1418 | MODULE_LICENSE("GPL v2" ); |
1419 | MODULE_DEVICE_TABLE(dmi, applesmc_whitelist); |
1420 | |