Commit | Line | Data |
---|---|---|
21eb0be9 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
6f2fad74 NB |
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> | |
41e71f97 | 8 | * Copyright (C) 2010 Henrik Rydberg <rydberg@euromail.se> |
6f2fad74 NB |
9 | * |
10 | * Based on hdaps.c driver: | |
11 | * Copyright (C) 2005 Robert Love <rml@novell.com> | |
aa8521ec | 12 | * Copyright (C) 2005 Jesper Juhl <jj@chaosbits.net> |
6f2fad74 NB |
13 | * |
14 | * Fan control based on smcFanControl: | |
15 | * Copyright (C) 2006 Hendrik Holtmann <holtmann@mac.com> | |
6f2fad74 NB |
16 | */ |
17 | ||
1ee7c71b JP |
18 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
19 | ||
6f2fad74 NB |
20 | #include <linux/delay.h> |
21 | #include <linux/platform_device.h> | |
58d5aa5c | 22 | #include <linux/input.h> |
6f2fad74 | 23 | #include <linux/kernel.h> |
5874583d | 24 | #include <linux/slab.h> |
6f2fad74 NB |
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> | |
6055fae8 | 30 | #include <linux/io.h> |
6f2fad74 NB |
31 | #include <linux/leds.h> |
32 | #include <linux/hwmon.h> | |
33 | #include <linux/workqueue.h> | |
fa845740 | 34 | #include <linux/err.h> |
4d64bb4b | 35 | #include <linux/bits.h> |
6f2fad74 NB |
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 | ||
4d64bb4b BC |
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 | |
8c9398d1 | 53 | |
6f2fad74 NB |
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 | ||
8bd1a12a HR |
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) */ | |
d5cf2b99 | 63 | #define BACKLIGHT_KEY "LKSB" /* w-o {lkb (2 bytes) */ |
6f2fad74 | 64 | |
d5cf2b99 | 65 | #define CLAMSHELL_KEY "MSLD" /* r-o ui8 (unused) */ |
6f2fad74 NB |
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 */ | |
3eba2bf7 | 74 | #define FAN_ID_FMT "F%dID" /* r-o char[16] */ |
6f2fad74 | 75 | |
b6e5122f HR |
76 | #define TEMP_SENSOR_TYPE "sp78" |
77 | ||
6f2fad74 | 78 | /* List of keys used to read/write fan speeds */ |
3eba2bf7 HR |
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) */ | |
6f2fad74 NB |
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 | ||
d5cf2b99 | 90 | #define APPLESMC_POLL_INTERVAL 50 /* msecs */ |
6f2fad74 NB |
91 | #define APPLESMC_INPUT_FUZZ 4 /* input event threshold */ |
92 | #define APPLESMC_INPUT_FLAT 4 | |
93 | ||
3eba2bf7 HR |
94 | #define to_index(attr) (to_sensor_dev_attr(attr)->index & 0xffff) |
95 | #define to_option(attr) (to_sensor_dev_attr(attr)->index >> 16) | |
9792dadf | 96 | |
9792dadf HR |
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 */ | |
3eba2bf7 | 108 | int option; /* function argument */ |
9792dadf HR |
109 | struct applesmc_dev_attr *nodes; /* dynamic node array */ |
110 | }; | |
111 | ||
5874583d HR |
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 */ | |
3eba2bf7 | 125 | unsigned int fan_count; /* number of fans */ |
9792dadf HR |
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 */ | |
e30bca12 | 129 | unsigned int index_count; /* size of temperature index array */ |
40ef06f1 HR |
130 | int num_light_sensors; /* number of light sensors */ |
131 | bool has_accelerometer; /* has motion sensor */ | |
132 | bool has_key_backlight; /* has keyboard backlight */ | |
5874583d HR |
133 | bool init_complete; /* true when fully initialized */ |
134 | struct applesmc_entry *cache; /* cached key entries */ | |
e30bca12 | 135 | const char **index; /* temperature key index */ |
5874583d HR |
136 | } smcreg = { |
137 | .mutex = __MUTEX_INITIALIZER(smcreg.mutex), | |
138 | }; | |
139 | ||
6f2fad74 NB |
140 | static const int debug; |
141 | static struct platform_device *pdev; | |
142 | static s16 rest_x; | |
143 | static s16 rest_y; | |
a976f150 HR |
144 | static u8 backlight_state[2]; |
145 | ||
1beeffe4 | 146 | static struct device *hwmon_dev; |
58d5aa5c | 147 | static struct input_dev *applesmc_idev; |
6f2fad74 | 148 | |
6f2fad74 NB |
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 | /* | |
4d64bb4b BC |
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. | |
6f2fad74 | 163 | */ |
4d64bb4b BC |
164 | |
165 | static int wait_status(u8 val, u8 mask) | |
6f2fad74 | 166 | { |
829917cd | 167 | u8 status; |
8c9398d1 | 168 | int us; |
4d64bb4b | 169 | int i; |
fff2d0f7 | 170 | |
4d64bb4b BC |
171 | us = APPLESMC_MIN_WAIT; |
172 | for (i = 0; i < 24 ; i++) { | |
829917cd | 173 | status = inb(APPLESMC_CMD_PORT); |
4d64bb4b | 174 | if ((status & mask) == val) |
6f2fad74 | 175 | return 0; |
4d64bb4b BC |
176 | usleep_range(us, us * 2); |
177 | if (i > 9) | |
178 | us <<= 1; | |
6f2fad74 | 179 | } |
6f2fad74 NB |
180 | return -EIO; |
181 | } | |
182 | ||
4d64bb4b BC |
183 | /* send_byte - Write to SMC data port. Callers must hold applesmc_lock. */ |
184 | ||
829917cd | 185 | static int send_byte(u8 cmd, u16 port) |
84d2d7f2 | 186 | { |
4d64bb4b BC |
187 | int status; |
188 | ||
189 | status = wait_status(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; | |
829917cd HR |
201 | |
202 | outb(cmd, port); | |
4d64bb4b | 203 | return 0; |
84d2d7f2 HR |
204 | } |
205 | ||
4d64bb4b BC |
206 | /* send_command - Write a command to the SMC. Callers must hold applesmc_lock. */ |
207 | ||
829917cd HR |
208 | static int send_command(u8 cmd) |
209 | { | |
4d64bb4b BC |
210 | int ret; |
211 | ||
212 | ret = wait_status(0, SMC_STATUS_IB_CLOSED); | |
213 | if (ret) | |
214 | return ret; | |
215 | outb(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(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(0, SMC_STATUS_BUSY); | |
829917cd HR |
236 | } |
237 | ||
5874583d | 238 | static int send_argument(const char *key) |
6f2fad74 NB |
239 | { |
240 | int i; | |
241 | ||
829917cd HR |
242 | for (i = 0; i < 4; i++) |
243 | if (send_byte(key[i], APPLESMC_DATA_PORT)) | |
6f2fad74 | 244 | return -EIO; |
5874583d HR |
245 | return 0; |
246 | } | |
247 | ||
248 | static int read_smc(u8 cmd, const char *key, u8 *buffer, u8 len) | |
249 | { | |
25f2bd7f | 250 | u8 status, data = 0; |
5874583d | 251 | int i; |
4d64bb4b BC |
252 | int ret; |
253 | ||
254 | ret = smc_sane(); | |
255 | if (ret) | |
256 | return ret; | |
5874583d HR |
257 | |
258 | if (send_command(cmd) || send_argument(key)) { | |
ac852edb | 259 | pr_warn("%.4s: read arg fail\n", key); |
5874583d HR |
260 | return -EIO; |
261 | } | |
6f2fad74 | 262 | |
25f2bd7f | 263 | /* This has no effect on newer (2012) SMCs */ |
829917cd HR |
264 | if (send_byte(len, APPLESMC_DATA_PORT)) { |
265 | pr_warn("%.4s: read len fail\n", key); | |
266 | return -EIO; | |
267 | } | |
6f2fad74 NB |
268 | |
269 | for (i = 0; i < len; i++) { | |
4d64bb4b BC |
270 | if (wait_status(SMC_STATUS_AWAITING_DATA | SMC_STATUS_BUSY, |
271 | SMC_STATUS_AWAITING_DATA | SMC_STATUS_BUSY)) { | |
829917cd | 272 | pr_warn("%.4s: read data[%d] fail\n", key, i); |
6f2fad74 | 273 | return -EIO; |
5874583d | 274 | } |
6f2fad74 | 275 | buffer[i] = inb(APPLESMC_DATA_PORT); |
6f2fad74 | 276 | } |
6f2fad74 | 277 | |
25f2bd7f HR |
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); | |
4d64bb4b | 282 | if (!(status & SMC_STATUS_AWAITING_DATA)) |
25f2bd7f HR |
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 | ||
4d64bb4b | 289 | return wait_status(0, SMC_STATUS_BUSY); |
6f2fad74 NB |
290 | } |
291 | ||
5874583d | 292 | static int write_smc(u8 cmd, const char *key, const u8 *buffer, u8 len) |
6f2fad74 NB |
293 | { |
294 | int i; | |
4d64bb4b BC |
295 | int ret; |
296 | ||
297 | ret = smc_sane(); | |
298 | if (ret) | |
299 | return ret; | |
6f2fad74 | 300 | |
5874583d HR |
301 | if (send_command(cmd) || send_argument(key)) { |
302 | pr_warn("%s: write arg fail\n", key); | |
6f2fad74 | 303 | return -EIO; |
6f2fad74 NB |
304 | } |
305 | ||
829917cd HR |
306 | if (send_byte(len, APPLESMC_DATA_PORT)) { |
307 | pr_warn("%.4s: write len fail\n", key); | |
308 | return -EIO; | |
309 | } | |
6f2fad74 NB |
310 | |
311 | for (i = 0; i < len; i++) { | |
829917cd | 312 | if (send_byte(buffer[i], APPLESMC_DATA_PORT)) { |
5874583d | 313 | pr_warn("%s: write data fail\n", key); |
6f2fad74 | 314 | return -EIO; |
5874583d | 315 | } |
6f2fad74 NB |
316 | } |
317 | ||
4d64bb4b | 318 | return wait_status(0, SMC_STATUS_BUSY); |
6f2fad74 NB |
319 | } |
320 | ||
5874583d HR |
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, (u8 *)&be, 4); | |
327 | if (ret) | |
328 | return ret; | |
329 | ||
330 | *count = be32_to_cpu(be); | |
331 | return 0; | |
332 | } | |
333 | ||
6f2fad74 | 334 | /* |
5874583d HR |
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. | |
6f2fad74 | 339 | */ |
5874583d HR |
340 | |
341 | static int applesmc_read_entry(const struct applesmc_entry *entry, | |
342 | u8 *buf, u8 len) | |
6f2fad74 | 343 | { |
5874583d | 344 | int ret; |
6f2fad74 | 345 | |
5874583d HR |
346 | if (entry->len != len) |
347 | return -EINVAL; | |
348 | mutex_lock(&smcreg.mutex); | |
349 | ret = read_smc(APPLESMC_READ_CMD, entry->key, buf, len); | |
350 | mutex_unlock(&smcreg.mutex); | |
6f2fad74 | 351 | |
5874583d HR |
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, entry->key, buf, len); | |
364 | mutex_unlock(&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, (u8 *)&be, key, 4); | |
384 | if (ret) | |
385 | goto out; | |
386 | ret = read_smc(APPLESMC_GET_KEY_TYPE_CMD, key, info, 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]; | |
952a11ca | 394 | cache->valid = true; |
5874583d HR |
395 | |
396 | out: | |
397 | mutex_unlock(&smcreg.mutex); | |
398 | if (ret) | |
399 | return ERR_PTR(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(middle); | |
0fc86eca HR |
411 | if (IS_ERR(entry)) { |
412 | *lo = 0; | |
5874583d | 413 | return PTR_ERR(entry); |
0fc86eca | 414 | } |
5874583d HR |
415 | if (strcmp(entry->key, key) < 0) |
416 | begin = middle + 1; | |
417 | else | |
418 | end = middle; | |
6f2fad74 NB |
419 | } |
420 | ||
5874583d HR |
421 | *lo = begin; |
422 | return 0; | |
423 | } | |
6f2fad74 | 424 | |
5874583d HR |
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(middle); | |
0fc86eca HR |
433 | if (IS_ERR(entry)) { |
434 | *hi = smcreg.key_count; | |
5874583d | 435 | return PTR_ERR(entry); |
0fc86eca | 436 | } |
5874583d HR |
437 | if (strcmp(key, entry->key) < 0) |
438 | end = middle; | |
439 | else | |
440 | begin = middle + 1; | |
6f2fad74 | 441 | } |
6f2fad74 | 442 | |
5874583d | 443 | *hi = begin; |
6f2fad74 NB |
444 | return 0; |
445 | } | |
446 | ||
5874583d | 447 | static const struct applesmc_entry *applesmc_get_entry_by_key(const char *key) |
6f2fad74 | 448 | { |
5874583d HR |
449 | int begin, end; |
450 | int ret; | |
6f2fad74 | 451 | |
5874583d HR |
452 | ret = applesmc_get_lower_bound(&begin, key); |
453 | if (ret) | |
454 | return ERR_PTR(ret); | |
455 | ret = applesmc_get_upper_bound(&end, key); | |
456 | if (ret) | |
457 | return ERR_PTR(ret); | |
458 | if (end - begin != 1) | |
459 | return ERR_PTR(-EINVAL); | |
6f2fad74 | 460 | |
5874583d HR |
461 | return applesmc_get_entry_by_index(begin); |
462 | } | |
6f2fad74 | 463 | |
5874583d HR |
464 | static int applesmc_read_key(const char *key, u8 *buffer, u8 len) |
465 | { | |
466 | const struct applesmc_entry *entry; | |
6f2fad74 | 467 | |
5874583d HR |
468 | entry = applesmc_get_entry_by_key(key); |
469 | if (IS_ERR(entry)) | |
470 | return PTR_ERR(entry); | |
6f2fad74 | 471 | |
5874583d HR |
472 | return applesmc_read_entry(entry, 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(entry)) | |
481 | return PTR_ERR(entry); | |
482 | ||
483 | return applesmc_write_entry(entry, buffer, len); | |
6f2fad74 NB |
484 | } |
485 | ||
40ef06f1 HR |
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(entry) && PTR_ERR(entry) != -EINVAL) | |
492 | return PTR_ERR(entry); | |
493 | ||
494 | *value = !IS_ERR(entry); | |
495 | return 0; | |
496 | } | |
497 | ||
6f2fad74 | 498 | /* |
edf48f3a | 499 | * applesmc_read_s16 - Read 16-bit signed big endian register |
6f2fad74 | 500 | */ |
edf48f3a | 501 | static int applesmc_read_s16(const char *key, s16 *value) |
6f2fad74 NB |
502 | { |
503 | u8 buffer[2]; | |
504 | int ret; | |
505 | ||
edf48f3a HR |
506 | ret = applesmc_read_key(key, buffer, 2); |
507 | if (ret) | |
508 | return ret; | |
6f2fad74 NB |
509 | |
510 | *value = ((s16)buffer[0] << 8) | buffer[1]; | |
edf48f3a | 511 | return 0; |
6f2fad74 NB |
512 | } |
513 | ||
514 | /* | |
2344cd0c | 515 | * applesmc_device_init - initialize the accelerometer. Can sleep. |
6f2fad74 | 516 | */ |
2344cd0c | 517 | static void applesmc_device_init(void) |
6f2fad74 | 518 | { |
2344cd0c | 519 | int total; |
6f2fad74 NB |
520 | u8 buffer[2]; |
521 | ||
40ef06f1 | 522 | if (!smcreg.has_accelerometer) |
2344cd0c | 523 | return; |
6f2fad74 | 524 | |
6f2fad74 | 525 | for (total = INIT_TIMEOUT_MSECS; total > 0; total -= INIT_WAIT_MSECS) { |
6f2fad74 | 526 | if (!applesmc_read_key(MOTION_SENSOR_KEY, buffer, 2) && |
2344cd0c | 527 | (buffer[0] != 0x00 || buffer[1] != 0x00)) |
5874583d | 528 | return; |
6f2fad74 NB |
529 | buffer[0] = 0xe0; |
530 | buffer[1] = 0x00; | |
531 | applesmc_write_key(MOTION_SENSOR_KEY, buffer, 2); | |
532 | msleep(INIT_WAIT_MSECS); | |
533 | } | |
534 | ||
1ee7c71b | 535 | pr_warn("failed to init the device\n"); |
6f2fad74 NB |
536 | } |
537 | ||
e30bca12 HR |
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(s->temp_count, 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(i); | |
552 | if (IS_ERR(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 | ||
5874583d HR |
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; | |
0bf6a1e8 | 568 | bool left_light_sensor = false, right_light_sensor = false; |
5f451386 | 569 | unsigned int count; |
3eba2bf7 | 570 | u8 tmp[1]; |
5874583d HR |
571 | int ret; |
572 | ||
573 | if (s->init_complete) | |
574 | return 0; | |
575 | ||
5f451386 | 576 | ret = read_register_count(&count); |
5874583d HR |
577 | if (ret) |
578 | return ret; | |
579 | ||
5f451386 HR |
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(s->cache); | |
584 | s->cache = NULL; | |
585 | } | |
586 | s->key_count = count; | |
587 | ||
5874583d HR |
588 | if (!s->cache) |
589 | s->cache = kcalloc(s->key_count, sizeof(*s->cache), GFP_KERNEL); | |
590 | if (!s->cache) | |
591 | return -ENOMEM; | |
592 | ||
3eba2bf7 HR |
593 | ret = applesmc_read_key(FANS_COUNT, tmp, 1); |
594 | if (ret) | |
595 | return ret; | |
596 | s->fan_count = tmp[0]; | |
1009ccdc GR |
597 | if (s->fan_count > 10) |
598 | s->fan_count = 10; | |
3eba2bf7 | 599 | |
9792dadf HR |
600 | ret = applesmc_get_lower_bound(&s->temp_begin, "T"); |
601 | if (ret) | |
602 | return ret; | |
603 | ret = applesmc_get_lower_bound(&s->temp_end, "U"); | |
604 | if (ret) | |
605 | return ret; | |
606 | s->temp_count = s->temp_end - s->temp_begin; | |
607 | ||
e30bca12 HR |
608 | ret = applesmc_init_index(s); |
609 | if (ret) | |
610 | return ret; | |
611 | ||
40ef06f1 HR |
612 | ret = applesmc_has_key(LIGHT_SENSOR_LEFT_KEY, &left_light_sensor); |
613 | if (ret) | |
614 | return ret; | |
615 | ret = applesmc_has_key(LIGHT_SENSOR_RIGHT_KEY, &right_light_sensor); | |
616 | if (ret) | |
617 | return ret; | |
618 | ret = applesmc_has_key(MOTION_SENSOR_KEY, &s->has_accelerometer); | |
619 | if (ret) | |
620 | return ret; | |
621 | ret = applesmc_has_key(BACKLIGHT_KEY, &s->has_key_backlight); | |
622 | if (ret) | |
623 | return ret; | |
624 | ||
625 | s->num_light_sensors = left_light_sensor + right_light_sensor; | |
5874583d HR |
626 | s->init_complete = true; |
627 | ||
e30bca12 HR |
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, | |
40ef06f1 HR |
630 | s->has_accelerometer, |
631 | s->num_light_sensors, | |
632 | s->has_key_backlight); | |
5874583d HR |
633 | |
634 | return 0; | |
635 | } | |
636 | ||
e30bca12 HR |
637 | static void applesmc_destroy_smcreg(void) |
638 | { | |
639 | kfree(smcreg.index); | |
640 | smcreg.index = NULL; | |
641 | kfree(smcreg.cache); | |
642 | smcreg.cache = NULL; | |
643 | smcreg.init_complete = false; | |
644 | } | |
645 | ||
5874583d HR |
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 | ||
e30bca12 | 666 | applesmc_destroy_smcreg(); |
5874583d HR |
667 | |
668 | return ret; | |
669 | } | |
670 | ||
6f2fad74 NB |
671 | /* Device model stuff */ |
672 | static int applesmc_probe(struct platform_device *dev) | |
673 | { | |
5874583d HR |
674 | int ret; |
675 | ||
676 | ret = applesmc_init_smcreg(); | |
677 | if (ret) | |
678 | return ret; | |
679 | ||
2344cd0c | 680 | applesmc_device_init(); |
6f2fad74 | 681 | |
6f2fad74 NB |
682 | return 0; |
683 | } | |
684 | ||
a976f150 HR |
685 | /* Synchronize device with memorized backlight state */ |
686 | static int applesmc_pm_resume(struct device *dev) | |
687 | { | |
40ef06f1 | 688 | if (smcreg.has_key_backlight) |
a976f150 | 689 | applesmc_write_key(BACKLIGHT_KEY, backlight_state, 2); |
a976f150 HR |
690 | return 0; |
691 | } | |
692 | ||
693 | /* Reinitialize device on resume from hibernation */ | |
694 | static int applesmc_pm_restore(struct device *dev) | |
6f2fad74 | 695 | { |
2344cd0c | 696 | applesmc_device_init(); |
a976f150 | 697 | return applesmc_pm_resume(dev); |
6f2fad74 NB |
698 | } |
699 | ||
47145210 | 700 | static const struct dev_pm_ops applesmc_pm_ops = { |
a976f150 HR |
701 | .resume = applesmc_pm_resume, |
702 | .restore = applesmc_pm_restore, | |
703 | }; | |
704 | ||
6f2fad74 NB |
705 | static struct platform_driver applesmc_driver = { |
706 | .probe = applesmc_probe, | |
6f2fad74 NB |
707 | .driver = { |
708 | .name = "applesmc", | |
a976f150 | 709 | .pm = &applesmc_pm_ops, |
6f2fad74 NB |
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 | { | |
edf48f3a HR |
719 | applesmc_read_s16(MOTION_SENSOR_X_KEY, &rest_x); |
720 | applesmc_read_s16(MOTION_SENSOR_Y_KEY, &rest_y); | |
6f2fad74 NB |
721 | rest_x = -rest_x; |
722 | } | |
723 | ||
58d5aa5c | 724 | static void applesmc_idev_poll(struct input_dev *idev) |
6f2fad74 NB |
725 | { |
726 | s16 x, y; | |
727 | ||
edf48f3a | 728 | if (applesmc_read_s16(MOTION_SENSOR_X_KEY, &x)) |
5874583d | 729 | return; |
edf48f3a | 730 | if (applesmc_read_s16(MOTION_SENSOR_Y_KEY, &y)) |
5874583d | 731 | return; |
6f2fad74 NB |
732 | |
733 | x = -x; | |
d5cf2b99 DT |
734 | input_report_abs(idev, ABS_X, x - rest_x); |
735 | input_report_abs(idev, ABS_Y, y - rest_y); | |
736 | input_sync(idev); | |
6f2fad74 NB |
737 | } |
738 | ||
739 | /* Sysfs Files */ | |
740 | ||
fa74419b NB |
741 | static ssize_t applesmc_name_show(struct device *dev, |
742 | struct device_attribute *attr, char *buf) | |
743 | { | |
1f4d4af4 | 744 | return sysfs_emit(buf, "applesmc\n"); |
fa74419b NB |
745 | } |
746 | ||
6f2fad74 NB |
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 | ||
edf48f3a | 753 | ret = applesmc_read_s16(MOTION_SENSOR_X_KEY, &x); |
6f2fad74 NB |
754 | if (ret) |
755 | goto out; | |
edf48f3a | 756 | ret = applesmc_read_s16(MOTION_SENSOR_Y_KEY, &y); |
6f2fad74 NB |
757 | if (ret) |
758 | goto out; | |
edf48f3a | 759 | ret = applesmc_read_s16(MOTION_SENSOR_Z_KEY, &z); |
6f2fad74 NB |
760 | if (ret) |
761 | goto out; | |
762 | ||
763 | out: | |
6f2fad74 NB |
764 | if (ret) |
765 | return ret; | |
1f4d4af4 GR |
766 | |
767 | return sysfs_emit(buf, "(%d,%d,%d)\n", x, y, z); | |
6f2fad74 NB |
768 | } |
769 | ||
770 | static ssize_t applesmc_light_show(struct device *dev, | |
771 | struct device_attribute *attr, char *sysfsbuf) | |
772 | { | |
5874583d | 773 | const struct applesmc_entry *entry; |
8bd1a12a | 774 | static int data_length; |
6f2fad74 NB |
775 | int ret; |
776 | u8 left = 0, right = 0; | |
5874583d | 777 | u8 buffer[10]; |
6f2fad74 | 778 | |
8bd1a12a | 779 | if (!data_length) { |
5874583d HR |
780 | entry = applesmc_get_entry_by_key(LIGHT_SENSOR_LEFT_KEY); |
781 | if (IS_ERR(entry)) | |
782 | return PTR_ERR(entry); | |
783 | if (entry->len > 10) | |
784 | return -ENXIO; | |
785 | data_length = entry->len; | |
1ee7c71b | 786 | pr_info("light sensor data length set to %d\n", data_length); |
8bd1a12a HR |
787 | } |
788 | ||
789 | ret = applesmc_read_key(LIGHT_SENSOR_LEFT_KEY, buffer, data_length); | |
cecf7560 TR |
790 | if (ret) |
791 | goto out; | |
c3d6362b AM |
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 | } | |
6f2fad74 | 797 | left = buffer[2]; |
cecf7560 TR |
798 | |
799 | ret = applesmc_read_key(LIGHT_SENSOR_RIGHT_KEY, buffer, data_length); | |
6f2fad74 NB |
800 | if (ret) |
801 | goto out; | |
6f2fad74 NB |
802 | right = buffer[2]; |
803 | ||
804 | out: | |
6f2fad74 NB |
805 | if (ret) |
806 | return ret; | |
1f4d4af4 GR |
807 | |
808 | return sysfs_emit(sysfsbuf, "(%d,%d)\n", left, right); | |
6f2fad74 NB |
809 | } |
810 | ||
fa5575cf AM |
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 | { | |
e30bca12 | 815 | const char *key = smcreg.index[to_index(devattr)]; |
fa5575cf | 816 | |
1f4d4af4 | 817 | return sysfs_emit(sysfsbuf, "%s\n", key); |
fa5575cf AM |
818 | } |
819 | ||
6f2fad74 NB |
820 | /* Displays degree Celsius * 1000 */ |
821 | static ssize_t applesmc_show_temperature(struct device *dev, | |
822 | struct device_attribute *devattr, char *sysfsbuf) | |
823 | { | |
e30bca12 | 824 | const char *key = smcreg.index[to_index(devattr)]; |
6f2fad74 | 825 | int ret; |
b6e5122f HR |
826 | s16 value; |
827 | int temp; | |
6f2fad74 | 828 | |
e30bca12 | 829 | ret = applesmc_read_s16(key, &value); |
6f2fad74 NB |
830 | if (ret) |
831 | return ret; | |
9792dadf | 832 | |
b6e5122f | 833 | temp = 250 * (value >> 6); |
9792dadf | 834 | |
1f4d4af4 | 835 | return sysfs_emit(sysfsbuf, "%d\n", temp); |
6f2fad74 NB |
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]; | |
6f2fad74 | 845 | |
1009ccdc GR |
846 | scnprintf(newkey, sizeof(newkey), fan_speed_fmt[to_option(attr)], |
847 | to_index(attr)); | |
6f2fad74 | 848 | |
6f2fad74 | 849 | ret = applesmc_read_key(newkey, buffer, 2); |
6f2fad74 NB |
850 | if (ret) |
851 | return ret; | |
cecf7560 TR |
852 | |
853 | speed = ((buffer[0] << 8 | buffer[1]) >> 2); | |
1f4d4af4 | 854 | return sysfs_emit(sysfsbuf, "%u\n", speed); |
6f2fad74 NB |
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; | |
2bfe8148 | 862 | unsigned long speed; |
6f2fad74 NB |
863 | char newkey[5]; |
864 | u8 buffer[2]; | |
6f2fad74 | 865 | |
179c4fdb | 866 | if (kstrtoul(sysfsbuf, 10, &speed) < 0 || speed >= 0x4000) |
2bfe8148 | 867 | return -EINVAL; /* Bigger than a 14-bit value */ |
6f2fad74 | 868 | |
1009ccdc GR |
869 | scnprintf(newkey, sizeof(newkey), fan_speed_fmt[to_option(attr)], |
870 | to_index(attr)); | |
6f2fad74 | 871 | |
6f2fad74 NB |
872 | buffer[0] = (speed >> 6) & 0xff; |
873 | buffer[1] = (speed << 2) & 0xff; | |
874 | ret = applesmc_write_key(newkey, buffer, 2); | |
875 | ||
6f2fad74 NB |
876 | if (ret) |
877 | return ret; | |
878 | else | |
879 | return count; | |
880 | } | |
881 | ||
882 | static ssize_t applesmc_show_fan_manual(struct device *dev, | |
3eba2bf7 | 883 | struct device_attribute *attr, char *sysfsbuf) |
6f2fad74 NB |
884 | { |
885 | int ret; | |
886 | u16 manual = 0; | |
887 | u8 buffer[2]; | |
6f2fad74 | 888 | |
6f2fad74 | 889 | ret = applesmc_read_key(FANS_MANUAL, buffer, 2); |
6f2fad74 NB |
890 | if (ret) |
891 | return ret; | |
cecf7560 TR |
892 | |
893 | manual = ((buffer[0] << 8 | buffer[1]) >> to_index(attr)) & 0x01; | |
1f4d4af4 | 894 | return sysfs_emit(sysfsbuf, "%d\n", manual); |
6f2fad74 NB |
895 | } |
896 | ||
897 | static ssize_t applesmc_store_fan_manual(struct device *dev, | |
3eba2bf7 | 898 | struct device_attribute *attr, |
6f2fad74 NB |
899 | const char *sysfsbuf, size_t count) |
900 | { | |
901 | int ret; | |
902 | u8 buffer[2]; | |
2bfe8148 | 903 | unsigned long input; |
6f2fad74 | 904 | u16 val; |
6f2fad74 | 905 | |
179c4fdb | 906 | if (kstrtoul(sysfsbuf, 10, &input) < 0) |
2bfe8148 | 907 | return -EINVAL; |
6f2fad74 | 908 | |
6f2fad74 | 909 | ret = applesmc_read_key(FANS_MANUAL, buffer, 2); |
6f2fad74 NB |
910 | if (ret) |
911 | goto out; | |
912 | ||
cecf7560 TR |
913 | val = (buffer[0] << 8 | buffer[1]); |
914 | ||
6f2fad74 | 915 | if (input) |
3eba2bf7 | 916 | val = val | (0x01 << to_index(attr)); |
6f2fad74 | 917 | else |
3eba2bf7 | 918 | val = val & ~(0x01 << to_index(attr)); |
6f2fad74 NB |
919 | |
920 | buffer[0] = (val >> 8) & 0xFF; | |
921 | buffer[1] = val & 0xFF; | |
922 | ||
923 | ret = applesmc_write_key(FANS_MANUAL, buffer, 2); | |
924 | ||
925 | out: | |
6f2fad74 NB |
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]; | |
6f2fad74 | 938 | |
1009ccdc | 939 | scnprintf(newkey, sizeof(newkey), FAN_ID_FMT, to_index(attr)); |
6f2fad74 | 940 | |
6f2fad74 NB |
941 | ret = applesmc_read_key(newkey, buffer, 16); |
942 | buffer[16] = 0; | |
943 | ||
6f2fad74 NB |
944 | if (ret) |
945 | return ret; | |
1f4d4af4 GR |
946 | |
947 | return sysfs_emit(sysfsbuf, "%s\n", buffer + 4); | |
6f2fad74 NB |
948 | } |
949 | ||
950 | static ssize_t applesmc_calibrate_show(struct device *dev, | |
951 | struct device_attribute *attr, char *sysfsbuf) | |
952 | { | |
1f4d4af4 | 953 | return sysfs_emit(sysfsbuf, "(%d,%d)\n", rest_x, rest_y); |
6f2fad74 NB |
954 | } |
955 | ||
956 | static ssize_t applesmc_calibrate_store(struct device *dev, | |
957 | struct device_attribute *attr, const char *sysfsbuf, size_t count) | |
958 | { | |
6f2fad74 | 959 | applesmc_calibrate(); |
6f2fad74 NB |
960 | |
961 | return count; | |
962 | } | |
963 | ||
6f2fad74 NB |
964 | static void applesmc_backlight_set(struct work_struct *work) |
965 | { | |
a976f150 | 966 | applesmc_write_key(BACKLIGHT_KEY, backlight_state, 2); |
6f2fad74 NB |
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 | ||
a976f150 | 975 | backlight_state[0] = value; |
6f2fad74 NB |
976 | ret = queue_work(applesmc_led_wq, &backlight_work); |
977 | ||
978 | if (debug && (!ret)) | |
692fe501 | 979 | dev_dbg(led_cdev->dev, "work was already on the queue.\n"); |
6f2fad74 NB |
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 | ||
6f2fad74 | 989 | ret = applesmc_read_key(KEY_COUNT_KEY, buffer, 4); |
6f2fad74 NB |
990 | if (ret) |
991 | return ret; | |
cecf7560 TR |
992 | |
993 | count = ((u32)buffer[0]<<24) + ((u32)buffer[1]<<16) + | |
994 | ((u32)buffer[2]<<8) + buffer[3]; | |
1f4d4af4 | 995 | return sysfs_emit(sysfsbuf, "%d\n", count); |
6f2fad74 NB |
996 | } |
997 | ||
998 | static ssize_t applesmc_key_at_index_read_show(struct device *dev, | |
999 | struct device_attribute *attr, char *sysfsbuf) | |
1000 | { | |
5874583d | 1001 | const struct applesmc_entry *entry; |
6f2fad74 NB |
1002 | int ret; |
1003 | ||
5874583d HR |
1004 | entry = applesmc_get_entry_by_index(key_at_index); |
1005 | if (IS_ERR(entry)) | |
1006 | return PTR_ERR(entry); | |
1007 | ret = applesmc_read_entry(entry, sysfsbuf, entry->len); | |
1008 | if (ret) | |
6f2fad74 | 1009 | return ret; |
6f2fad74 | 1010 | |
5874583d | 1011 | return entry->len; |
6f2fad74 NB |
1012 | } |
1013 | ||
1014 | static ssize_t applesmc_key_at_index_data_length_show(struct device *dev, | |
1015 | struct device_attribute *attr, char *sysfsbuf) | |
1016 | { | |
5874583d | 1017 | const struct applesmc_entry *entry; |
6f2fad74 | 1018 | |
5874583d HR |
1019 | entry = applesmc_get_entry_by_index(key_at_index); |
1020 | if (IS_ERR(entry)) | |
1021 | return PTR_ERR(entry); | |
6f2fad74 | 1022 | |
1f4d4af4 | 1023 | return sysfs_emit(sysfsbuf, "%d\n", entry->len); |
6f2fad74 NB |
1024 | } |
1025 | ||
1026 | static ssize_t applesmc_key_at_index_type_show(struct device *dev, | |
1027 | struct device_attribute *attr, char *sysfsbuf) | |
1028 | { | |
5874583d | 1029 | const struct applesmc_entry *entry; |
6f2fad74 | 1030 | |
5874583d HR |
1031 | entry = applesmc_get_entry_by_index(key_at_index); |
1032 | if (IS_ERR(entry)) | |
1033 | return PTR_ERR(entry); | |
6f2fad74 | 1034 | |
1f4d4af4 | 1035 | return sysfs_emit(sysfsbuf, "%s\n", entry->type); |
6f2fad74 NB |
1036 | } |
1037 | ||
1038 | static ssize_t applesmc_key_at_index_name_show(struct device *dev, | |
1039 | struct device_attribute *attr, char *sysfsbuf) | |
1040 | { | |
5874583d | 1041 | const struct applesmc_entry *entry; |
6f2fad74 | 1042 | |
5874583d HR |
1043 | entry = applesmc_get_entry_by_index(key_at_index); |
1044 | if (IS_ERR(entry)) | |
1045 | return PTR_ERR(entry); | |
6f2fad74 | 1046 | |
1f4d4af4 | 1047 | return sysfs_emit(sysfsbuf, "%s\n", entry->key); |
6f2fad74 NB |
1048 | } |
1049 | ||
1050 | static ssize_t applesmc_key_at_index_show(struct device *dev, | |
1051 | struct device_attribute *attr, char *sysfsbuf) | |
1052 | { | |
1f4d4af4 | 1053 | return sysfs_emit(sysfsbuf, "%d\n", key_at_index); |
6f2fad74 NB |
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 | { | |
5874583d | 1059 | unsigned long newkey; |
6f2fad74 | 1060 | |
179c4fdb | 1061 | if (kstrtoul(sysfsbuf, 10, &newkey) < 0 |
5874583d HR |
1062 | || newkey >= smcreg.key_count) |
1063 | return -EINVAL; | |
6f2fad74 | 1064 | |
5874583d | 1065 | key_at_index = newkey; |
6f2fad74 NB |
1066 | return count; |
1067 | } | |
1068 | ||
1069 | static struct led_classdev applesmc_backlight = { | |
6c152bee | 1070 | .name = "smc::kbd_backlight", |
6f2fad74 NB |
1071 | .default_trigger = "nand-disk", |
1072 | .brightness_set = applesmc_brightness_set, | |
1073 | }; | |
1074 | ||
0b0b5dff HR |
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 | { } | |
6f2fad74 NB |
1084 | }; |
1085 | ||
0b0b5dff HR |
1086 | static struct applesmc_node_group accelerometer_group[] = { |
1087 | { "position", applesmc_position_show }, | |
1088 | { "calibrate", applesmc_calibrate_show, applesmc_calibrate_store }, | |
1089 | { } | |
6f2fad74 NB |
1090 | }; |
1091 | ||
0b0b5dff HR |
1092 | static struct applesmc_node_group light_sensor_group[] = { |
1093 | { "light", applesmc_light_show }, | |
1094 | { } | |
1095 | }; | |
6f2fad74 | 1096 | |
3eba2bf7 HR |
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 | { } | |
6f2fad74 NB |
1106 | }; |
1107 | ||
9792dadf HR |
1108 | static struct applesmc_node_group temp_group[] = { |
1109 | { "temp%d_label", applesmc_show_sensor_label }, | |
1110 | { "temp%d_input", applesmc_show_temperature }, | |
1111 | { } | |
fa5575cf AM |
1112 | }; |
1113 | ||
6f2fad74 NB |
1114 | /* Module stuff */ |
1115 | ||
9792dadf HR |
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(&pdev->dev.kobj, | |
1127 | &node->sda.dev_attr.attr); | |
1128 | kfree(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(num + 1, 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]; | |
1009ccdc GR |
1151 | scnprintf(node->name, sizeof(node->name), grp->format, |
1152 | i + 1); | |
3eba2bf7 | 1153 | node->sda.index = (grp->option << 16) | (i & 0xffff); |
9792dadf HR |
1154 | node->sda.dev_attr.show = grp->show; |
1155 | node->sda.dev_attr.store = grp->store; | |
1156 | attr = &node->sda.dev_attr.attr; | |
9d1f8a40 | 1157 | sysfs_attr_init(attr); |
9792dadf | 1158 | attr->name = node->name; |
71ee4a40 | 1159 | attr->mode = 0444 | (grp->store ? 0200 : 0); |
9792dadf HR |
1160 | ret = sysfs_create_file(&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 | ||
0c6cac7a | 1174 | /* Create accelerometer resources */ |
6f2fad74 NB |
1175 | static int applesmc_create_accelerometer(void) |
1176 | { | |
1177 | int ret; | |
1178 | ||
0b0b5dff HR |
1179 | if (!smcreg.has_accelerometer) |
1180 | return 0; | |
1181 | ||
1182 | ret = applesmc_create_nodes(accelerometer_group, 1); | |
6f2fad74 NB |
1183 | if (ret) |
1184 | goto out; | |
1185 | ||
58d5aa5c | 1186 | applesmc_idev = input_allocate_device(); |
6f2fad74 NB |
1187 | if (!applesmc_idev) { |
1188 | ret = -ENOMEM; | |
1189 | goto out_sysfs; | |
1190 | } | |
1191 | ||
1192 | /* initial calibrate for the input device */ | |
1193 | applesmc_calibrate(); | |
1194 | ||
d5cf2b99 | 1195 | /* initialize the input device */ |
58d5aa5c DT |
1196 | applesmc_idev->name = "applesmc"; |
1197 | applesmc_idev->id.bustype = BUS_HOST; | |
1198 | applesmc_idev->dev.parent = &pdev->dev; | |
1199 | input_set_abs_params(applesmc_idev, ABS_X, | |
6f2fad74 | 1200 | -256, 256, APPLESMC_INPUT_FUZZ, APPLESMC_INPUT_FLAT); |
58d5aa5c | 1201 | input_set_abs_params(applesmc_idev, ABS_Y, |
6f2fad74 NB |
1202 | -256, 256, APPLESMC_INPUT_FUZZ, APPLESMC_INPUT_FLAT); |
1203 | ||
58d5aa5c DT |
1204 | ret = input_setup_polling(applesmc_idev, applesmc_idev_poll); |
1205 | if (ret) | |
1206 | goto out_idev; | |
1207 | ||
1208 | input_set_poll_interval(applesmc_idev, APPLESMC_POLL_INTERVAL); | |
1209 | ||
1210 | ret = input_register_device(applesmc_idev); | |
6f2fad74 NB |
1211 | if (ret) |
1212 | goto out_idev; | |
1213 | ||
6f2fad74 NB |
1214 | return 0; |
1215 | ||
1216 | out_idev: | |
58d5aa5c | 1217 | input_free_device(applesmc_idev); |
6f2fad74 NB |
1218 | |
1219 | out_sysfs: | |
0b0b5dff | 1220 | applesmc_destroy_nodes(accelerometer_group); |
6f2fad74 NB |
1221 | |
1222 | out: | |
1ee7c71b | 1223 | pr_warn("driver init failed (ret=%d)!\n", ret); |
6f2fad74 NB |
1224 | return ret; |
1225 | } | |
1226 | ||
0c6cac7a | 1227 | /* Release all resources used by the accelerometer */ |
6f2fad74 NB |
1228 | static void applesmc_release_accelerometer(void) |
1229 | { | |
0b0b5dff HR |
1230 | if (!smcreg.has_accelerometer) |
1231 | return; | |
58d5aa5c | 1232 | input_unregister_device(applesmc_idev); |
0b0b5dff | 1233 | applesmc_destroy_nodes(accelerometer_group); |
6f2fad74 | 1234 | } |
0b0b5dff HR |
1235 | |
1236 | static int applesmc_create_light_sensor(void) | |
1237 | { | |
1238 | if (!smcreg.num_light_sensors) | |
1239 | return 0; | |
1240 | return applesmc_create_nodes(light_sensor_group, 1); | |
1241 | } | |
1242 | ||
1243 | static void applesmc_release_light_sensor(void) | |
1244 | { | |
1245 | if (!smcreg.num_light_sensors) | |
1246 | return; | |
1247 | applesmc_destroy_nodes(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(&pdev->dev, &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(&applesmc_backlight); | |
1265 | destroy_workqueue(applesmc_led_wq); | |
1266 | } | |
1267 | ||
40ef06f1 HR |
1268 | static int applesmc_dmi_match(const struct dmi_system_id *id) |
1269 | { | |
1270 | return 1; | |
1271 | } | |
6f2fad74 | 1272 | |
85ebfd3e GR |
1273 | /* |
1274 | * Note that DMI_MATCH(...,"MacBook") will match "MacBookPro1,1". | |
1275 | * So we need to put "Apple MacBook Pro" before "Apple MacBook". | |
1276 | */ | |
6faadbbb | 1277 | static const struct dmi_system_id applesmc_whitelist[] __initconst = { |
f5274c97 HR |
1278 | { applesmc_dmi_match, "Apple MacBook Air", { |
1279 | DMI_MATCH(DMI_BOARD_VENDOR, "Apple"), | |
1280 | DMI_MATCH(DMI_PRODUCT_NAME, "MacBookAir") }, | |
40ef06f1 | 1281 | }, |
6f2fad74 | 1282 | { applesmc_dmi_match, "Apple MacBook Pro", { |
2bfe8148 GR |
1283 | DMI_MATCH(DMI_BOARD_VENDOR, "Apple"), |
1284 | DMI_MATCH(DMI_PRODUCT_NAME, "MacBookPro") }, | |
40ef06f1 | 1285 | }, |
cd19ba13 | 1286 | { applesmc_dmi_match, "Apple MacBook", { |
2bfe8148 GR |
1287 | DMI_MATCH(DMI_BOARD_VENDOR, "Apple"), |
1288 | DMI_MATCH(DMI_PRODUCT_NAME, "MacBook") }, | |
40ef06f1 | 1289 | }, |
6f2fad74 | 1290 | { applesmc_dmi_match, "Apple Macmini", { |
2bfe8148 GR |
1291 | DMI_MATCH(DMI_BOARD_VENDOR, "Apple"), |
1292 | DMI_MATCH(DMI_PRODUCT_NAME, "Macmini") }, | |
40ef06f1 | 1293 | }, |
45a3a36b HR |
1294 | { applesmc_dmi_match, "Apple MacPro", { |
1295 | DMI_MATCH(DMI_BOARD_VENDOR, "Apple"), | |
1296 | DMI_MATCH(DMI_PRODUCT_NAME, "MacPro") }, | |
40ef06f1 | 1297 | }, |
9f86f28d | 1298 | { applesmc_dmi_match, "Apple iMac", { |
2bfe8148 GR |
1299 | DMI_MATCH(DMI_BOARD_VENDOR, "Apple"), |
1300 | DMI_MATCH(DMI_PRODUCT_NAME, "iMac") }, | |
40ef06f1 | 1301 | }, |
6cbf7964 JJ |
1302 | { applesmc_dmi_match, "Apple Xserve", { |
1303 | DMI_MATCH(DMI_BOARD_VENDOR, "Apple"), | |
1304 | DMI_MATCH(DMI_PRODUCT_NAME, "Xserve") }, | |
1305 | }, | |
6f2fad74 NB |
1306 | { .ident = NULL } |
1307 | }; | |
1308 | ||
1309 | static int __init applesmc_init(void) | |
1310 | { | |
1311 | int ret; | |
6f2fad74 | 1312 | |
6f2fad74 | 1313 | if (!dmi_check_system(applesmc_whitelist)) { |
1ee7c71b | 1314 | pr_warn("supported laptop not found!\n"); |
6f2fad74 NB |
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 | ||
ddfbf2af JD |
1329 | pdev = platform_device_register_simple("applesmc", APPLESMC_DATA_PORT, |
1330 | NULL, 0); | |
6f2fad74 NB |
1331 | if (IS_ERR(pdev)) { |
1332 | ret = PTR_ERR(pdev); | |
1333 | goto out_driver; | |
1334 | } | |
1335 | ||
5874583d HR |
1336 | /* create register cache */ |
1337 | ret = applesmc_init_smcreg(); | |
6996abf0 NB |
1338 | if (ret) |
1339 | goto out_device; | |
fa74419b | 1340 | |
0b0b5dff | 1341 | ret = applesmc_create_nodes(info_group, 1); |
5874583d HR |
1342 | if (ret) |
1343 | goto out_smcreg; | |
1344 | ||
3eba2bf7 HR |
1345 | ret = applesmc_create_nodes(fan_group, smcreg.fan_count); |
1346 | if (ret) | |
1347 | goto out_info; | |
6f2fad74 | 1348 | |
e30bca12 | 1349 | ret = applesmc_create_nodes(temp_group, smcreg.index_count); |
9792dadf HR |
1350 | if (ret) |
1351 | goto out_fans; | |
6f2fad74 | 1352 | |
0b0b5dff HR |
1353 | ret = applesmc_create_accelerometer(); |
1354 | if (ret) | |
1355 | goto out_temperature; | |
6f2fad74 | 1356 | |
0b0b5dff HR |
1357 | ret = applesmc_create_light_sensor(); |
1358 | if (ret) | |
1359 | goto out_accelerometer; | |
6f2fad74 | 1360 | |
0b0b5dff HR |
1361 | ret = applesmc_create_key_backlight(); |
1362 | if (ret) | |
1363 | goto out_light_sysfs; | |
6f2fad74 | 1364 | |
1beeffe4 TJ |
1365 | hwmon_dev = hwmon_device_register(&pdev->dev); |
1366 | if (IS_ERR(hwmon_dev)) { | |
1367 | ret = PTR_ERR(hwmon_dev); | |
6f2fad74 NB |
1368 | goto out_light_ledclass; |
1369 | } | |
1370 | ||
6f2fad74 NB |
1371 | return 0; |
1372 | ||
1373 | out_light_ledclass: | |
0b0b5dff | 1374 | applesmc_release_key_backlight(); |
6f2fad74 | 1375 | out_light_sysfs: |
0b0b5dff | 1376 | applesmc_release_light_sensor(); |
6f2fad74 | 1377 | out_accelerometer: |
0b0b5dff | 1378 | applesmc_release_accelerometer(); |
6f2fad74 | 1379 | out_temperature: |
9792dadf | 1380 | applesmc_destroy_nodes(temp_group); |
0559a538 | 1381 | out_fans: |
3eba2bf7 HR |
1382 | applesmc_destroy_nodes(fan_group); |
1383 | out_info: | |
0b0b5dff | 1384 | applesmc_destroy_nodes(info_group); |
5874583d HR |
1385 | out_smcreg: |
1386 | applesmc_destroy_smcreg(); | |
6f2fad74 NB |
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: | |
1ee7c71b | 1394 | pr_warn("driver init failed (ret=%d)!\n", ret); |
6f2fad74 NB |
1395 | return ret; |
1396 | } | |
1397 | ||
1398 | static void __exit applesmc_exit(void) | |
1399 | { | |
1beeffe4 | 1400 | hwmon_device_unregister(hwmon_dev); |
0b0b5dff HR |
1401 | applesmc_release_key_backlight(); |
1402 | applesmc_release_light_sensor(); | |
1403 | applesmc_release_accelerometer(); | |
9792dadf | 1404 | applesmc_destroy_nodes(temp_group); |
3eba2bf7 | 1405 | applesmc_destroy_nodes(fan_group); |
0b0b5dff | 1406 | applesmc_destroy_nodes(info_group); |
5874583d | 1407 | applesmc_destroy_smcreg(); |
6f2fad74 NB |
1408 | platform_device_unregister(pdev); |
1409 | platform_driver_unregister(&applesmc_driver); | |
1410 | release_region(APPLESMC_DATA_PORT, APPLESMC_NR_PORTS); | |
6f2fad74 NB |
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"); | |
dc924efb | 1419 | MODULE_DEVICE_TABLE(dmi, applesmc_whitelist); |