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Commit | Line | Data |
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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> | |
d5cf2b99 | 22 | #include <linux/input-polldev.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> |
6f2fad74 NB |
35 | |
36 | /* data port used by Apple SMC */ | |
37 | #define APPLESMC_DATA_PORT 0x300 | |
38 | /* command/status port used by Apple SMC */ | |
39 | #define APPLESMC_CMD_PORT 0x304 | |
40 | ||
41 | #define APPLESMC_NR_PORTS 32 /* 0x300-0x31f */ | |
42 | ||
43 | #define APPLESMC_MAX_DATA_LENGTH 32 | |
44 | ||
521cf648 | 45 | /* wait up to 128 ms for a status change. */ |
a332bf9a | 46 | #define APPLESMC_MIN_WAIT 0x0010 |
829917cd | 47 | #define APPLESMC_RETRY_WAIT 0x0100 |
521cf648 | 48 | #define APPLESMC_MAX_WAIT 0x20000 |
8c9398d1 | 49 | |
6f2fad74 NB |
50 | #define APPLESMC_READ_CMD 0x10 |
51 | #define APPLESMC_WRITE_CMD 0x11 | |
52 | #define APPLESMC_GET_KEY_BY_INDEX_CMD 0x12 | |
53 | #define APPLESMC_GET_KEY_TYPE_CMD 0x13 | |
54 | ||
55 | #define KEY_COUNT_KEY "#KEY" /* r-o ui32 */ | |
56 | ||
8bd1a12a HR |
57 | #define LIGHT_SENSOR_LEFT_KEY "ALV0" /* r-o {alv (6-10 bytes) */ |
58 | #define LIGHT_SENSOR_RIGHT_KEY "ALV1" /* r-o {alv (6-10 bytes) */ | |
d5cf2b99 | 59 | #define BACKLIGHT_KEY "LKSB" /* w-o {lkb (2 bytes) */ |
6f2fad74 | 60 | |
d5cf2b99 | 61 | #define CLAMSHELL_KEY "MSLD" /* r-o ui8 (unused) */ |
6f2fad74 NB |
62 | |
63 | #define MOTION_SENSOR_X_KEY "MO_X" /* r-o sp78 (2 bytes) */ | |
64 | #define MOTION_SENSOR_Y_KEY "MO_Y" /* r-o sp78 (2 bytes) */ | |
65 | #define MOTION_SENSOR_Z_KEY "MO_Z" /* r-o sp78 (2 bytes) */ | |
66 | #define MOTION_SENSOR_KEY "MOCN" /* r/w ui16 */ | |
67 | ||
68 | #define FANS_COUNT "FNum" /* r-o ui8 */ | |
69 | #define FANS_MANUAL "FS! " /* r-w ui16 */ | |
3eba2bf7 | 70 | #define FAN_ID_FMT "F%dID" /* r-o char[16] */ |
6f2fad74 | 71 | |
b6e5122f HR |
72 | #define TEMP_SENSOR_TYPE "sp78" |
73 | ||
6f2fad74 | 74 | /* List of keys used to read/write fan speeds */ |
3eba2bf7 HR |
75 | static const char *const fan_speed_fmt[] = { |
76 | "F%dAc", /* actual speed */ | |
77 | "F%dMn", /* minimum speed (rw) */ | |
78 | "F%dMx", /* maximum speed */ | |
79 | "F%dSf", /* safe speed - not all models */ | |
80 | "F%dTg", /* target speed (manual: rw) */ | |
6f2fad74 NB |
81 | }; |
82 | ||
83 | #define INIT_TIMEOUT_MSECS 5000 /* wait up to 5s for device init ... */ | |
84 | #define INIT_WAIT_MSECS 50 /* ... in 50ms increments */ | |
85 | ||
d5cf2b99 | 86 | #define APPLESMC_POLL_INTERVAL 50 /* msecs */ |
6f2fad74 NB |
87 | #define APPLESMC_INPUT_FUZZ 4 /* input event threshold */ |
88 | #define APPLESMC_INPUT_FLAT 4 | |
89 | ||
3eba2bf7 HR |
90 | #define to_index(attr) (to_sensor_dev_attr(attr)->index & 0xffff) |
91 | #define to_option(attr) (to_sensor_dev_attr(attr)->index >> 16) | |
9792dadf | 92 | |
9792dadf HR |
93 | /* Dynamic device node attributes */ |
94 | struct applesmc_dev_attr { | |
95 | struct sensor_device_attribute sda; /* hwmon attributes */ | |
96 | char name[32]; /* room for node file name */ | |
97 | }; | |
98 | ||
99 | /* Dynamic device node group */ | |
100 | struct applesmc_node_group { | |
101 | char *format; /* format string */ | |
102 | void *show; /* show function */ | |
103 | void *store; /* store function */ | |
3eba2bf7 | 104 | int option; /* function argument */ |
9792dadf HR |
105 | struct applesmc_dev_attr *nodes; /* dynamic node array */ |
106 | }; | |
107 | ||
5874583d HR |
108 | /* AppleSMC entry - cached register information */ |
109 | struct applesmc_entry { | |
110 | char key[5]; /* four-letter key code */ | |
111 | u8 valid; /* set when entry is successfully read once */ | |
112 | u8 len; /* bounded by APPLESMC_MAX_DATA_LENGTH */ | |
113 | char type[5]; /* four-letter type code */ | |
114 | u8 flags; /* 0x10: func; 0x40: write; 0x80: read */ | |
115 | }; | |
116 | ||
117 | /* Register lookup and registers common to all SMCs */ | |
118 | static struct applesmc_registers { | |
119 | struct mutex mutex; /* register read/write mutex */ | |
120 | unsigned int key_count; /* number of SMC registers */ | |
3eba2bf7 | 121 | unsigned int fan_count; /* number of fans */ |
9792dadf HR |
122 | unsigned int temp_count; /* number of temperature registers */ |
123 | unsigned int temp_begin; /* temperature lower index bound */ | |
124 | unsigned int temp_end; /* temperature upper index bound */ | |
e30bca12 | 125 | unsigned int index_count; /* size of temperature index array */ |
40ef06f1 HR |
126 | int num_light_sensors; /* number of light sensors */ |
127 | bool has_accelerometer; /* has motion sensor */ | |
128 | bool has_key_backlight; /* has keyboard backlight */ | |
5874583d HR |
129 | bool init_complete; /* true when fully initialized */ |
130 | struct applesmc_entry *cache; /* cached key entries */ | |
e30bca12 | 131 | const char **index; /* temperature key index */ |
5874583d HR |
132 | } smcreg = { |
133 | .mutex = __MUTEX_INITIALIZER(smcreg.mutex), | |
134 | }; | |
135 | ||
6f2fad74 NB |
136 | static const int debug; |
137 | static struct platform_device *pdev; | |
138 | static s16 rest_x; | |
139 | static s16 rest_y; | |
a976f150 HR |
140 | static u8 backlight_state[2]; |
141 | ||
1beeffe4 | 142 | static struct device *hwmon_dev; |
d5cf2b99 | 143 | static struct input_polled_dev *applesmc_idev; |
6f2fad74 | 144 | |
6f2fad74 NB |
145 | /* |
146 | * Last index written to key_at_index sysfs file, and value to use for all other | |
147 | * key_at_index_* sysfs files. | |
148 | */ | |
149 | static unsigned int key_at_index; | |
150 | ||
151 | static struct workqueue_struct *applesmc_led_wq; | |
152 | ||
153 | /* | |
829917cd | 154 | * wait_read - Wait for a byte to appear on SMC port. Callers must |
6f2fad74 NB |
155 | * hold applesmc_lock. |
156 | */ | |
829917cd | 157 | static int wait_read(void) |
6f2fad74 | 158 | { |
829917cd | 159 | u8 status; |
8c9398d1 | 160 | int us; |
8c9398d1 HR |
161 | for (us = APPLESMC_MIN_WAIT; us < APPLESMC_MAX_WAIT; us <<= 1) { |
162 | udelay(us); | |
829917cd HR |
163 | status = inb(APPLESMC_CMD_PORT); |
164 | /* read: wait for smc to settle */ | |
165 | if (status & 0x01) | |
6f2fad74 | 166 | return 0; |
6f2fad74 NB |
167 | } |
168 | ||
829917cd | 169 | pr_warn("wait_read() fail: 0x%02x\n", status); |
6f2fad74 NB |
170 | return -EIO; |
171 | } | |
172 | ||
84d2d7f2 | 173 | /* |
829917cd HR |
174 | * send_byte - Write to SMC port, retrying when necessary. Callers |
175 | * must hold applesmc_lock. | |
84d2d7f2 | 176 | */ |
829917cd | 177 | static int send_byte(u8 cmd, u16 port) |
84d2d7f2 | 178 | { |
829917cd | 179 | u8 status; |
8c9398d1 | 180 | int us; |
829917cd HR |
181 | |
182 | outb(cmd, port); | |
8c9398d1 | 183 | for (us = APPLESMC_MIN_WAIT; us < APPLESMC_MAX_WAIT; us <<= 1) { |
8c9398d1 | 184 | udelay(us); |
829917cd HR |
185 | status = inb(APPLESMC_CMD_PORT); |
186 | /* write: wait for smc to settle */ | |
187 | if (status & 0x02) | |
188 | continue; | |
189 | /* ready: cmd accepted, return */ | |
190 | if (status & 0x04) | |
84d2d7f2 | 191 | return 0; |
829917cd HR |
192 | /* timeout: give up */ |
193 | if (us << 1 == APPLESMC_MAX_WAIT) | |
194 | break; | |
195 | /* busy: long wait and resend */ | |
196 | udelay(APPLESMC_RETRY_WAIT); | |
197 | outb(cmd, port); | |
84d2d7f2 | 198 | } |
829917cd HR |
199 | |
200 | pr_warn("send_byte(0x%02x, 0x%04x) fail: 0x%02x\n", cmd, port, status); | |
84d2d7f2 HR |
201 | return -EIO; |
202 | } | |
203 | ||
829917cd HR |
204 | static int send_command(u8 cmd) |
205 | { | |
206 | return send_byte(cmd, APPLESMC_CMD_PORT); | |
207 | } | |
208 | ||
5874583d | 209 | static int send_argument(const char *key) |
6f2fad74 NB |
210 | { |
211 | int i; | |
212 | ||
829917cd HR |
213 | for (i = 0; i < 4; i++) |
214 | if (send_byte(key[i], APPLESMC_DATA_PORT)) | |
6f2fad74 | 215 | return -EIO; |
5874583d HR |
216 | return 0; |
217 | } | |
218 | ||
219 | static int read_smc(u8 cmd, const char *key, u8 *buffer, u8 len) | |
220 | { | |
25f2bd7f | 221 | u8 status, data = 0; |
5874583d HR |
222 | int i; |
223 | ||
224 | if (send_command(cmd) || send_argument(key)) { | |
ac852edb | 225 | pr_warn("%.4s: read arg fail\n", key); |
5874583d HR |
226 | return -EIO; |
227 | } | |
6f2fad74 | 228 | |
25f2bd7f | 229 | /* This has no effect on newer (2012) SMCs */ |
829917cd HR |
230 | if (send_byte(len, APPLESMC_DATA_PORT)) { |
231 | pr_warn("%.4s: read len fail\n", key); | |
232 | return -EIO; | |
233 | } | |
6f2fad74 NB |
234 | |
235 | for (i = 0; i < len; i++) { | |
829917cd HR |
236 | if (wait_read()) { |
237 | pr_warn("%.4s: read data[%d] fail\n", key, i); | |
6f2fad74 | 238 | return -EIO; |
5874583d | 239 | } |
6f2fad74 | 240 | buffer[i] = inb(APPLESMC_DATA_PORT); |
6f2fad74 | 241 | } |
6f2fad74 | 242 | |
25f2bd7f HR |
243 | /* Read the data port until bit0 is cleared */ |
244 | for (i = 0; i < 16; i++) { | |
245 | udelay(APPLESMC_MIN_WAIT); | |
246 | status = inb(APPLESMC_CMD_PORT); | |
247 | if (!(status & 0x01)) | |
248 | break; | |
249 | data = inb(APPLESMC_DATA_PORT); | |
250 | } | |
251 | if (i) | |
252 | pr_warn("flushed %d bytes, last value is: %d\n", i, data); | |
253 | ||
6f2fad74 NB |
254 | return 0; |
255 | } | |
256 | ||
5874583d | 257 | static int write_smc(u8 cmd, const char *key, const u8 *buffer, u8 len) |
6f2fad74 NB |
258 | { |
259 | int i; | |
260 | ||
5874583d HR |
261 | if (send_command(cmd) || send_argument(key)) { |
262 | pr_warn("%s: write arg fail\n", key); | |
6f2fad74 | 263 | return -EIO; |
6f2fad74 NB |
264 | } |
265 | ||
829917cd HR |
266 | if (send_byte(len, APPLESMC_DATA_PORT)) { |
267 | pr_warn("%.4s: write len fail\n", key); | |
268 | return -EIO; | |
269 | } | |
6f2fad74 NB |
270 | |
271 | for (i = 0; i < len; i++) { | |
829917cd | 272 | if (send_byte(buffer[i], APPLESMC_DATA_PORT)) { |
5874583d | 273 | pr_warn("%s: write data fail\n", key); |
6f2fad74 | 274 | return -EIO; |
5874583d | 275 | } |
6f2fad74 NB |
276 | } |
277 | ||
278 | return 0; | |
279 | } | |
280 | ||
5874583d HR |
281 | static int read_register_count(unsigned int *count) |
282 | { | |
283 | __be32 be; | |
284 | int ret; | |
285 | ||
286 | ret = read_smc(APPLESMC_READ_CMD, KEY_COUNT_KEY, (u8 *)&be, 4); | |
287 | if (ret) | |
288 | return ret; | |
289 | ||
290 | *count = be32_to_cpu(be); | |
291 | return 0; | |
292 | } | |
293 | ||
6f2fad74 | 294 | /* |
5874583d HR |
295 | * Serialized I/O |
296 | * | |
297 | * Returns zero on success or a negative error on failure. | |
298 | * All functions below are concurrency safe - callers should NOT hold lock. | |
6f2fad74 | 299 | */ |
5874583d HR |
300 | |
301 | static int applesmc_read_entry(const struct applesmc_entry *entry, | |
302 | u8 *buf, u8 len) | |
6f2fad74 | 303 | { |
5874583d | 304 | int ret; |
6f2fad74 | 305 | |
5874583d HR |
306 | if (entry->len != len) |
307 | return -EINVAL; | |
308 | mutex_lock(&smcreg.mutex); | |
309 | ret = read_smc(APPLESMC_READ_CMD, entry->key, buf, len); | |
310 | mutex_unlock(&smcreg.mutex); | |
6f2fad74 | 311 | |
5874583d HR |
312 | return ret; |
313 | } | |
314 | ||
315 | static int applesmc_write_entry(const struct applesmc_entry *entry, | |
316 | const u8 *buf, u8 len) | |
317 | { | |
318 | int ret; | |
319 | ||
320 | if (entry->len != len) | |
321 | return -EINVAL; | |
322 | mutex_lock(&smcreg.mutex); | |
323 | ret = write_smc(APPLESMC_WRITE_CMD, entry->key, buf, len); | |
324 | mutex_unlock(&smcreg.mutex); | |
325 | return ret; | |
326 | } | |
327 | ||
328 | static const struct applesmc_entry *applesmc_get_entry_by_index(int index) | |
329 | { | |
330 | struct applesmc_entry *cache = &smcreg.cache[index]; | |
331 | u8 key[4], info[6]; | |
332 | __be32 be; | |
333 | int ret = 0; | |
334 | ||
335 | if (cache->valid) | |
336 | return cache; | |
337 | ||
338 | mutex_lock(&smcreg.mutex); | |
339 | ||
340 | if (cache->valid) | |
341 | goto out; | |
342 | be = cpu_to_be32(index); | |
343 | ret = read_smc(APPLESMC_GET_KEY_BY_INDEX_CMD, (u8 *)&be, key, 4); | |
344 | if (ret) | |
345 | goto out; | |
346 | ret = read_smc(APPLESMC_GET_KEY_TYPE_CMD, key, info, 6); | |
347 | if (ret) | |
348 | goto out; | |
349 | ||
350 | memcpy(cache->key, key, 4); | |
351 | cache->len = info[0]; | |
352 | memcpy(cache->type, &info[1], 4); | |
353 | cache->flags = info[5]; | |
354 | cache->valid = 1; | |
355 | ||
356 | out: | |
357 | mutex_unlock(&smcreg.mutex); | |
358 | if (ret) | |
359 | return ERR_PTR(ret); | |
360 | return cache; | |
361 | } | |
362 | ||
363 | static int applesmc_get_lower_bound(unsigned int *lo, const char *key) | |
364 | { | |
365 | int begin = 0, end = smcreg.key_count; | |
366 | const struct applesmc_entry *entry; | |
367 | ||
368 | while (begin != end) { | |
369 | int middle = begin + (end - begin) / 2; | |
370 | entry = applesmc_get_entry_by_index(middle); | |
0fc86eca HR |
371 | if (IS_ERR(entry)) { |
372 | *lo = 0; | |
5874583d | 373 | return PTR_ERR(entry); |
0fc86eca | 374 | } |
5874583d HR |
375 | if (strcmp(entry->key, key) < 0) |
376 | begin = middle + 1; | |
377 | else | |
378 | end = middle; | |
6f2fad74 NB |
379 | } |
380 | ||
5874583d HR |
381 | *lo = begin; |
382 | return 0; | |
383 | } | |
6f2fad74 | 384 | |
5874583d HR |
385 | static int applesmc_get_upper_bound(unsigned int *hi, const char *key) |
386 | { | |
387 | int begin = 0, end = smcreg.key_count; | |
388 | const struct applesmc_entry *entry; | |
389 | ||
390 | while (begin != end) { | |
391 | int middle = begin + (end - begin) / 2; | |
392 | entry = applesmc_get_entry_by_index(middle); | |
0fc86eca HR |
393 | if (IS_ERR(entry)) { |
394 | *hi = smcreg.key_count; | |
5874583d | 395 | return PTR_ERR(entry); |
0fc86eca | 396 | } |
5874583d HR |
397 | if (strcmp(key, entry->key) < 0) |
398 | end = middle; | |
399 | else | |
400 | begin = middle + 1; | |
6f2fad74 | 401 | } |
6f2fad74 | 402 | |
5874583d | 403 | *hi = begin; |
6f2fad74 NB |
404 | return 0; |
405 | } | |
406 | ||
5874583d | 407 | static const struct applesmc_entry *applesmc_get_entry_by_key(const char *key) |
6f2fad74 | 408 | { |
5874583d HR |
409 | int begin, end; |
410 | int ret; | |
6f2fad74 | 411 | |
5874583d HR |
412 | ret = applesmc_get_lower_bound(&begin, key); |
413 | if (ret) | |
414 | return ERR_PTR(ret); | |
415 | ret = applesmc_get_upper_bound(&end, key); | |
416 | if (ret) | |
417 | return ERR_PTR(ret); | |
418 | if (end - begin != 1) | |
419 | return ERR_PTR(-EINVAL); | |
6f2fad74 | 420 | |
5874583d HR |
421 | return applesmc_get_entry_by_index(begin); |
422 | } | |
6f2fad74 | 423 | |
5874583d HR |
424 | static int applesmc_read_key(const char *key, u8 *buffer, u8 len) |
425 | { | |
426 | const struct applesmc_entry *entry; | |
6f2fad74 | 427 | |
5874583d HR |
428 | entry = applesmc_get_entry_by_key(key); |
429 | if (IS_ERR(entry)) | |
430 | return PTR_ERR(entry); | |
6f2fad74 | 431 | |
5874583d HR |
432 | return applesmc_read_entry(entry, buffer, len); |
433 | } | |
434 | ||
435 | static int applesmc_write_key(const char *key, const u8 *buffer, u8 len) | |
436 | { | |
437 | const struct applesmc_entry *entry; | |
438 | ||
439 | entry = applesmc_get_entry_by_key(key); | |
440 | if (IS_ERR(entry)) | |
441 | return PTR_ERR(entry); | |
442 | ||
443 | return applesmc_write_entry(entry, buffer, len); | |
6f2fad74 NB |
444 | } |
445 | ||
40ef06f1 HR |
446 | static int applesmc_has_key(const char *key, bool *value) |
447 | { | |
448 | const struct applesmc_entry *entry; | |
449 | ||
450 | entry = applesmc_get_entry_by_key(key); | |
451 | if (IS_ERR(entry) && PTR_ERR(entry) != -EINVAL) | |
452 | return PTR_ERR(entry); | |
453 | ||
454 | *value = !IS_ERR(entry); | |
455 | return 0; | |
456 | } | |
457 | ||
6f2fad74 | 458 | /* |
edf48f3a | 459 | * applesmc_read_s16 - Read 16-bit signed big endian register |
6f2fad74 | 460 | */ |
edf48f3a | 461 | static int applesmc_read_s16(const char *key, s16 *value) |
6f2fad74 NB |
462 | { |
463 | u8 buffer[2]; | |
464 | int ret; | |
465 | ||
edf48f3a HR |
466 | ret = applesmc_read_key(key, buffer, 2); |
467 | if (ret) | |
468 | return ret; | |
6f2fad74 NB |
469 | |
470 | *value = ((s16)buffer[0] << 8) | buffer[1]; | |
edf48f3a | 471 | return 0; |
6f2fad74 NB |
472 | } |
473 | ||
474 | /* | |
2344cd0c | 475 | * applesmc_device_init - initialize the accelerometer. Can sleep. |
6f2fad74 | 476 | */ |
2344cd0c | 477 | static void applesmc_device_init(void) |
6f2fad74 | 478 | { |
2344cd0c | 479 | int total; |
6f2fad74 NB |
480 | u8 buffer[2]; |
481 | ||
40ef06f1 | 482 | if (!smcreg.has_accelerometer) |
2344cd0c | 483 | return; |
6f2fad74 | 484 | |
6f2fad74 | 485 | for (total = INIT_TIMEOUT_MSECS; total > 0; total -= INIT_WAIT_MSECS) { |
6f2fad74 | 486 | if (!applesmc_read_key(MOTION_SENSOR_KEY, buffer, 2) && |
2344cd0c | 487 | (buffer[0] != 0x00 || buffer[1] != 0x00)) |
5874583d | 488 | return; |
6f2fad74 NB |
489 | buffer[0] = 0xe0; |
490 | buffer[1] = 0x00; | |
491 | applesmc_write_key(MOTION_SENSOR_KEY, buffer, 2); | |
492 | msleep(INIT_WAIT_MSECS); | |
493 | } | |
494 | ||
1ee7c71b | 495 | pr_warn("failed to init the device\n"); |
6f2fad74 NB |
496 | } |
497 | ||
e30bca12 HR |
498 | static int applesmc_init_index(struct applesmc_registers *s) |
499 | { | |
500 | const struct applesmc_entry *entry; | |
501 | unsigned int i; | |
502 | ||
503 | if (s->index) | |
504 | return 0; | |
505 | ||
506 | s->index = kcalloc(s->temp_count, sizeof(s->index[0]), GFP_KERNEL); | |
507 | if (!s->index) | |
508 | return -ENOMEM; | |
509 | ||
510 | for (i = s->temp_begin; i < s->temp_end; i++) { | |
511 | entry = applesmc_get_entry_by_index(i); | |
512 | if (IS_ERR(entry)) | |
513 | continue; | |
514 | if (strcmp(entry->type, TEMP_SENSOR_TYPE)) | |
515 | continue; | |
516 | s->index[s->index_count++] = entry->key; | |
517 | } | |
518 | ||
519 | return 0; | |
520 | } | |
521 | ||
5874583d HR |
522 | /* |
523 | * applesmc_init_smcreg_try - Try to initialize register cache. Idempotent. | |
524 | */ | |
525 | static int applesmc_init_smcreg_try(void) | |
526 | { | |
527 | struct applesmc_registers *s = &smcreg; | |
5e0a0ee4 | 528 | bool left_light_sensor = 0, right_light_sensor = 0; |
5f451386 | 529 | unsigned int count; |
3eba2bf7 | 530 | u8 tmp[1]; |
5874583d HR |
531 | int ret; |
532 | ||
533 | if (s->init_complete) | |
534 | return 0; | |
535 | ||
5f451386 | 536 | ret = read_register_count(&count); |
5874583d HR |
537 | if (ret) |
538 | return ret; | |
539 | ||
5f451386 HR |
540 | if (s->cache && s->key_count != count) { |
541 | pr_warn("key count changed from %d to %d\n", | |
542 | s->key_count, count); | |
543 | kfree(s->cache); | |
544 | s->cache = NULL; | |
545 | } | |
546 | s->key_count = count; | |
547 | ||
5874583d HR |
548 | if (!s->cache) |
549 | s->cache = kcalloc(s->key_count, sizeof(*s->cache), GFP_KERNEL); | |
550 | if (!s->cache) | |
551 | return -ENOMEM; | |
552 | ||
3eba2bf7 HR |
553 | ret = applesmc_read_key(FANS_COUNT, tmp, 1); |
554 | if (ret) | |
555 | return ret; | |
556 | s->fan_count = tmp[0]; | |
1009ccdc GR |
557 | if (s->fan_count > 10) |
558 | s->fan_count = 10; | |
3eba2bf7 | 559 | |
9792dadf HR |
560 | ret = applesmc_get_lower_bound(&s->temp_begin, "T"); |
561 | if (ret) | |
562 | return ret; | |
563 | ret = applesmc_get_lower_bound(&s->temp_end, "U"); | |
564 | if (ret) | |
565 | return ret; | |
566 | s->temp_count = s->temp_end - s->temp_begin; | |
567 | ||
e30bca12 HR |
568 | ret = applesmc_init_index(s); |
569 | if (ret) | |
570 | return ret; | |
571 | ||
40ef06f1 HR |
572 | ret = applesmc_has_key(LIGHT_SENSOR_LEFT_KEY, &left_light_sensor); |
573 | if (ret) | |
574 | return ret; | |
575 | ret = applesmc_has_key(LIGHT_SENSOR_RIGHT_KEY, &right_light_sensor); | |
576 | if (ret) | |
577 | return ret; | |
578 | ret = applesmc_has_key(MOTION_SENSOR_KEY, &s->has_accelerometer); | |
579 | if (ret) | |
580 | return ret; | |
581 | ret = applesmc_has_key(BACKLIGHT_KEY, &s->has_key_backlight); | |
582 | if (ret) | |
583 | return ret; | |
584 | ||
585 | s->num_light_sensors = left_light_sensor + right_light_sensor; | |
5874583d HR |
586 | s->init_complete = true; |
587 | ||
e30bca12 HR |
588 | pr_info("key=%d fan=%d temp=%d index=%d acc=%d lux=%d kbd=%d\n", |
589 | s->key_count, s->fan_count, s->temp_count, s->index_count, | |
40ef06f1 HR |
590 | s->has_accelerometer, |
591 | s->num_light_sensors, | |
592 | s->has_key_backlight); | |
5874583d HR |
593 | |
594 | return 0; | |
595 | } | |
596 | ||
e30bca12 HR |
597 | static void applesmc_destroy_smcreg(void) |
598 | { | |
599 | kfree(smcreg.index); | |
600 | smcreg.index = NULL; | |
601 | kfree(smcreg.cache); | |
602 | smcreg.cache = NULL; | |
603 | smcreg.init_complete = false; | |
604 | } | |
605 | ||
5874583d HR |
606 | /* |
607 | * applesmc_init_smcreg - Initialize register cache. | |
608 | * | |
609 | * Retries until initialization is successful, or the operation times out. | |
610 | * | |
611 | */ | |
612 | static int applesmc_init_smcreg(void) | |
613 | { | |
614 | int ms, ret; | |
615 | ||
616 | for (ms = 0; ms < INIT_TIMEOUT_MSECS; ms += INIT_WAIT_MSECS) { | |
617 | ret = applesmc_init_smcreg_try(); | |
618 | if (!ret) { | |
619 | if (ms) | |
620 | pr_info("init_smcreg() took %d ms\n", ms); | |
621 | return 0; | |
622 | } | |
623 | msleep(INIT_WAIT_MSECS); | |
624 | } | |
625 | ||
e30bca12 | 626 | applesmc_destroy_smcreg(); |
5874583d HR |
627 | |
628 | return ret; | |
629 | } | |
630 | ||
6f2fad74 NB |
631 | /* Device model stuff */ |
632 | static int applesmc_probe(struct platform_device *dev) | |
633 | { | |
5874583d HR |
634 | int ret; |
635 | ||
636 | ret = applesmc_init_smcreg(); | |
637 | if (ret) | |
638 | return ret; | |
639 | ||
2344cd0c | 640 | applesmc_device_init(); |
6f2fad74 | 641 | |
6f2fad74 NB |
642 | return 0; |
643 | } | |
644 | ||
a976f150 HR |
645 | /* Synchronize device with memorized backlight state */ |
646 | static int applesmc_pm_resume(struct device *dev) | |
647 | { | |
40ef06f1 | 648 | if (smcreg.has_key_backlight) |
a976f150 | 649 | applesmc_write_key(BACKLIGHT_KEY, backlight_state, 2); |
a976f150 HR |
650 | return 0; |
651 | } | |
652 | ||
653 | /* Reinitialize device on resume from hibernation */ | |
654 | static int applesmc_pm_restore(struct device *dev) | |
6f2fad74 | 655 | { |
2344cd0c | 656 | applesmc_device_init(); |
a976f150 | 657 | return applesmc_pm_resume(dev); |
6f2fad74 NB |
658 | } |
659 | ||
47145210 | 660 | static const struct dev_pm_ops applesmc_pm_ops = { |
a976f150 HR |
661 | .resume = applesmc_pm_resume, |
662 | .restore = applesmc_pm_restore, | |
663 | }; | |
664 | ||
6f2fad74 NB |
665 | static struct platform_driver applesmc_driver = { |
666 | .probe = applesmc_probe, | |
6f2fad74 NB |
667 | .driver = { |
668 | .name = "applesmc", | |
a976f150 | 669 | .pm = &applesmc_pm_ops, |
6f2fad74 NB |
670 | }, |
671 | }; | |
672 | ||
673 | /* | |
674 | * applesmc_calibrate - Set our "resting" values. Callers must | |
675 | * hold applesmc_lock. | |
676 | */ | |
677 | static void applesmc_calibrate(void) | |
678 | { | |
edf48f3a HR |
679 | applesmc_read_s16(MOTION_SENSOR_X_KEY, &rest_x); |
680 | applesmc_read_s16(MOTION_SENSOR_Y_KEY, &rest_y); | |
6f2fad74 NB |
681 | rest_x = -rest_x; |
682 | } | |
683 | ||
d5cf2b99 | 684 | static void applesmc_idev_poll(struct input_polled_dev *dev) |
6f2fad74 | 685 | { |
d5cf2b99 | 686 | struct input_dev *idev = dev->input; |
6f2fad74 NB |
687 | s16 x, y; |
688 | ||
edf48f3a | 689 | if (applesmc_read_s16(MOTION_SENSOR_X_KEY, &x)) |
5874583d | 690 | return; |
edf48f3a | 691 | if (applesmc_read_s16(MOTION_SENSOR_Y_KEY, &y)) |
5874583d | 692 | return; |
6f2fad74 NB |
693 | |
694 | x = -x; | |
d5cf2b99 DT |
695 | input_report_abs(idev, ABS_X, x - rest_x); |
696 | input_report_abs(idev, ABS_Y, y - rest_y); | |
697 | input_sync(idev); | |
6f2fad74 NB |
698 | } |
699 | ||
700 | /* Sysfs Files */ | |
701 | ||
fa74419b NB |
702 | static ssize_t applesmc_name_show(struct device *dev, |
703 | struct device_attribute *attr, char *buf) | |
704 | { | |
705 | return snprintf(buf, PAGE_SIZE, "applesmc\n"); | |
706 | } | |
707 | ||
6f2fad74 NB |
708 | static ssize_t applesmc_position_show(struct device *dev, |
709 | struct device_attribute *attr, char *buf) | |
710 | { | |
711 | int ret; | |
712 | s16 x, y, z; | |
713 | ||
edf48f3a | 714 | ret = applesmc_read_s16(MOTION_SENSOR_X_KEY, &x); |
6f2fad74 NB |
715 | if (ret) |
716 | goto out; | |
edf48f3a | 717 | ret = applesmc_read_s16(MOTION_SENSOR_Y_KEY, &y); |
6f2fad74 NB |
718 | if (ret) |
719 | goto out; | |
edf48f3a | 720 | ret = applesmc_read_s16(MOTION_SENSOR_Z_KEY, &z); |
6f2fad74 NB |
721 | if (ret) |
722 | goto out; | |
723 | ||
724 | out: | |
6f2fad74 NB |
725 | if (ret) |
726 | return ret; | |
727 | else | |
728 | return snprintf(buf, PAGE_SIZE, "(%d,%d,%d)\n", x, y, z); | |
729 | } | |
730 | ||
731 | static ssize_t applesmc_light_show(struct device *dev, | |
732 | struct device_attribute *attr, char *sysfsbuf) | |
733 | { | |
5874583d | 734 | const struct applesmc_entry *entry; |
8bd1a12a | 735 | static int data_length; |
6f2fad74 NB |
736 | int ret; |
737 | u8 left = 0, right = 0; | |
5874583d | 738 | u8 buffer[10]; |
6f2fad74 | 739 | |
8bd1a12a | 740 | if (!data_length) { |
5874583d HR |
741 | entry = applesmc_get_entry_by_key(LIGHT_SENSOR_LEFT_KEY); |
742 | if (IS_ERR(entry)) | |
743 | return PTR_ERR(entry); | |
744 | if (entry->len > 10) | |
745 | return -ENXIO; | |
746 | data_length = entry->len; | |
1ee7c71b | 747 | pr_info("light sensor data length set to %d\n", data_length); |
8bd1a12a HR |
748 | } |
749 | ||
750 | ret = applesmc_read_key(LIGHT_SENSOR_LEFT_KEY, buffer, data_length); | |
c3d6362b AM |
751 | /* newer macbooks report a single 10-bit bigendian value */ |
752 | if (data_length == 10) { | |
753 | left = be16_to_cpu(*(__be16 *)(buffer + 6)) >> 2; | |
754 | goto out; | |
755 | } | |
6f2fad74 NB |
756 | left = buffer[2]; |
757 | if (ret) | |
758 | goto out; | |
8bd1a12a | 759 | ret = applesmc_read_key(LIGHT_SENSOR_RIGHT_KEY, buffer, data_length); |
6f2fad74 NB |
760 | right = buffer[2]; |
761 | ||
762 | out: | |
6f2fad74 NB |
763 | if (ret) |
764 | return ret; | |
765 | else | |
766 | return snprintf(sysfsbuf, PAGE_SIZE, "(%d,%d)\n", left, right); | |
767 | } | |
768 | ||
fa5575cf AM |
769 | /* Displays sensor key as label */ |
770 | static ssize_t applesmc_show_sensor_label(struct device *dev, | |
771 | struct device_attribute *devattr, char *sysfsbuf) | |
772 | { | |
e30bca12 | 773 | const char *key = smcreg.index[to_index(devattr)]; |
fa5575cf | 774 | |
e30bca12 | 775 | return snprintf(sysfsbuf, PAGE_SIZE, "%s\n", key); |
fa5575cf AM |
776 | } |
777 | ||
6f2fad74 NB |
778 | /* Displays degree Celsius * 1000 */ |
779 | static ssize_t applesmc_show_temperature(struct device *dev, | |
780 | struct device_attribute *devattr, char *sysfsbuf) | |
781 | { | |
e30bca12 | 782 | const char *key = smcreg.index[to_index(devattr)]; |
6f2fad74 | 783 | int ret; |
b6e5122f HR |
784 | s16 value; |
785 | int temp; | |
6f2fad74 | 786 | |
e30bca12 | 787 | ret = applesmc_read_s16(key, &value); |
6f2fad74 NB |
788 | if (ret) |
789 | return ret; | |
9792dadf | 790 | |
b6e5122f | 791 | temp = 250 * (value >> 6); |
9792dadf | 792 | |
b6e5122f | 793 | return snprintf(sysfsbuf, PAGE_SIZE, "%d\n", temp); |
6f2fad74 NB |
794 | } |
795 | ||
796 | static ssize_t applesmc_show_fan_speed(struct device *dev, | |
797 | struct device_attribute *attr, char *sysfsbuf) | |
798 | { | |
799 | int ret; | |
800 | unsigned int speed = 0; | |
801 | char newkey[5]; | |
802 | u8 buffer[2]; | |
6f2fad74 | 803 | |
1009ccdc GR |
804 | scnprintf(newkey, sizeof(newkey), fan_speed_fmt[to_option(attr)], |
805 | to_index(attr)); | |
6f2fad74 | 806 | |
6f2fad74 NB |
807 | ret = applesmc_read_key(newkey, buffer, 2); |
808 | speed = ((buffer[0] << 8 | buffer[1]) >> 2); | |
809 | ||
6f2fad74 NB |
810 | if (ret) |
811 | return ret; | |
812 | else | |
813 | return snprintf(sysfsbuf, PAGE_SIZE, "%u\n", speed); | |
814 | } | |
815 | ||
816 | static ssize_t applesmc_store_fan_speed(struct device *dev, | |
817 | struct device_attribute *attr, | |
818 | const char *sysfsbuf, size_t count) | |
819 | { | |
820 | int ret; | |
2bfe8148 | 821 | unsigned long speed; |
6f2fad74 NB |
822 | char newkey[5]; |
823 | u8 buffer[2]; | |
6f2fad74 | 824 | |
179c4fdb | 825 | if (kstrtoul(sysfsbuf, 10, &speed) < 0 || speed >= 0x4000) |
2bfe8148 | 826 | return -EINVAL; /* Bigger than a 14-bit value */ |
6f2fad74 | 827 | |
1009ccdc GR |
828 | scnprintf(newkey, sizeof(newkey), fan_speed_fmt[to_option(attr)], |
829 | to_index(attr)); | |
6f2fad74 | 830 | |
6f2fad74 NB |
831 | buffer[0] = (speed >> 6) & 0xff; |
832 | buffer[1] = (speed << 2) & 0xff; | |
833 | ret = applesmc_write_key(newkey, buffer, 2); | |
834 | ||
6f2fad74 NB |
835 | if (ret) |
836 | return ret; | |
837 | else | |
838 | return count; | |
839 | } | |
840 | ||
841 | static ssize_t applesmc_show_fan_manual(struct device *dev, | |
3eba2bf7 | 842 | struct device_attribute *attr, char *sysfsbuf) |
6f2fad74 NB |
843 | { |
844 | int ret; | |
845 | u16 manual = 0; | |
846 | u8 buffer[2]; | |
6f2fad74 | 847 | |
6f2fad74 | 848 | ret = applesmc_read_key(FANS_MANUAL, buffer, 2); |
3eba2bf7 | 849 | manual = ((buffer[0] << 8 | buffer[1]) >> to_index(attr)) & 0x01; |
6f2fad74 | 850 | |
6f2fad74 NB |
851 | if (ret) |
852 | return ret; | |
853 | else | |
854 | return snprintf(sysfsbuf, PAGE_SIZE, "%d\n", manual); | |
855 | } | |
856 | ||
857 | static ssize_t applesmc_store_fan_manual(struct device *dev, | |
3eba2bf7 | 858 | struct device_attribute *attr, |
6f2fad74 NB |
859 | const char *sysfsbuf, size_t count) |
860 | { | |
861 | int ret; | |
862 | u8 buffer[2]; | |
2bfe8148 | 863 | unsigned long input; |
6f2fad74 | 864 | u16 val; |
6f2fad74 | 865 | |
179c4fdb | 866 | if (kstrtoul(sysfsbuf, 10, &input) < 0) |
2bfe8148 | 867 | return -EINVAL; |
6f2fad74 | 868 | |
6f2fad74 NB |
869 | ret = applesmc_read_key(FANS_MANUAL, buffer, 2); |
870 | val = (buffer[0] << 8 | buffer[1]); | |
871 | if (ret) | |
872 | goto out; | |
873 | ||
874 | if (input) | |
3eba2bf7 | 875 | val = val | (0x01 << to_index(attr)); |
6f2fad74 | 876 | else |
3eba2bf7 | 877 | val = val & ~(0x01 << to_index(attr)); |
6f2fad74 NB |
878 | |
879 | buffer[0] = (val >> 8) & 0xFF; | |
880 | buffer[1] = val & 0xFF; | |
881 | ||
882 | ret = applesmc_write_key(FANS_MANUAL, buffer, 2); | |
883 | ||
884 | out: | |
6f2fad74 NB |
885 | if (ret) |
886 | return ret; | |
887 | else | |
888 | return count; | |
889 | } | |
890 | ||
891 | static ssize_t applesmc_show_fan_position(struct device *dev, | |
892 | struct device_attribute *attr, char *sysfsbuf) | |
893 | { | |
894 | int ret; | |
895 | char newkey[5]; | |
896 | u8 buffer[17]; | |
6f2fad74 | 897 | |
1009ccdc | 898 | scnprintf(newkey, sizeof(newkey), FAN_ID_FMT, to_index(attr)); |
6f2fad74 | 899 | |
6f2fad74 NB |
900 | ret = applesmc_read_key(newkey, buffer, 16); |
901 | buffer[16] = 0; | |
902 | ||
6f2fad74 NB |
903 | if (ret) |
904 | return ret; | |
905 | else | |
906 | return snprintf(sysfsbuf, PAGE_SIZE, "%s\n", buffer+4); | |
907 | } | |
908 | ||
909 | static ssize_t applesmc_calibrate_show(struct device *dev, | |
910 | struct device_attribute *attr, char *sysfsbuf) | |
911 | { | |
912 | return snprintf(sysfsbuf, PAGE_SIZE, "(%d,%d)\n", rest_x, rest_y); | |
913 | } | |
914 | ||
915 | static ssize_t applesmc_calibrate_store(struct device *dev, | |
916 | struct device_attribute *attr, const char *sysfsbuf, size_t count) | |
917 | { | |
6f2fad74 | 918 | applesmc_calibrate(); |
6f2fad74 NB |
919 | |
920 | return count; | |
921 | } | |
922 | ||
6f2fad74 NB |
923 | static void applesmc_backlight_set(struct work_struct *work) |
924 | { | |
a976f150 | 925 | applesmc_write_key(BACKLIGHT_KEY, backlight_state, 2); |
6f2fad74 NB |
926 | } |
927 | static DECLARE_WORK(backlight_work, &applesmc_backlight_set); | |
928 | ||
929 | static void applesmc_brightness_set(struct led_classdev *led_cdev, | |
930 | enum led_brightness value) | |
931 | { | |
932 | int ret; | |
933 | ||
a976f150 | 934 | backlight_state[0] = value; |
6f2fad74 NB |
935 | ret = queue_work(applesmc_led_wq, &backlight_work); |
936 | ||
937 | if (debug && (!ret)) | |
692fe501 | 938 | dev_dbg(led_cdev->dev, "work was already on the queue.\n"); |
6f2fad74 NB |
939 | } |
940 | ||
941 | static ssize_t applesmc_key_count_show(struct device *dev, | |
942 | struct device_attribute *attr, char *sysfsbuf) | |
943 | { | |
944 | int ret; | |
945 | u8 buffer[4]; | |
946 | u32 count; | |
947 | ||
6f2fad74 NB |
948 | ret = applesmc_read_key(KEY_COUNT_KEY, buffer, 4); |
949 | count = ((u32)buffer[0]<<24) + ((u32)buffer[1]<<16) + | |
950 | ((u32)buffer[2]<<8) + buffer[3]; | |
951 | ||
6f2fad74 NB |
952 | if (ret) |
953 | return ret; | |
954 | else | |
955 | return snprintf(sysfsbuf, PAGE_SIZE, "%d\n", count); | |
956 | } | |
957 | ||
958 | static ssize_t applesmc_key_at_index_read_show(struct device *dev, | |
959 | struct device_attribute *attr, char *sysfsbuf) | |
960 | { | |
5874583d | 961 | const struct applesmc_entry *entry; |
6f2fad74 NB |
962 | int ret; |
963 | ||
5874583d HR |
964 | entry = applesmc_get_entry_by_index(key_at_index); |
965 | if (IS_ERR(entry)) | |
966 | return PTR_ERR(entry); | |
967 | ret = applesmc_read_entry(entry, sysfsbuf, entry->len); | |
968 | if (ret) | |
6f2fad74 | 969 | return ret; |
6f2fad74 | 970 | |
5874583d | 971 | return entry->len; |
6f2fad74 NB |
972 | } |
973 | ||
974 | static ssize_t applesmc_key_at_index_data_length_show(struct device *dev, | |
975 | struct device_attribute *attr, char *sysfsbuf) | |
976 | { | |
5874583d | 977 | const struct applesmc_entry *entry; |
6f2fad74 | 978 | |
5874583d HR |
979 | entry = applesmc_get_entry_by_index(key_at_index); |
980 | if (IS_ERR(entry)) | |
981 | return PTR_ERR(entry); | |
6f2fad74 | 982 | |
5874583d | 983 | return snprintf(sysfsbuf, PAGE_SIZE, "%d\n", entry->len); |
6f2fad74 NB |
984 | } |
985 | ||
986 | static ssize_t applesmc_key_at_index_type_show(struct device *dev, | |
987 | struct device_attribute *attr, char *sysfsbuf) | |
988 | { | |
5874583d | 989 | const struct applesmc_entry *entry; |
6f2fad74 | 990 | |
5874583d HR |
991 | entry = applesmc_get_entry_by_index(key_at_index); |
992 | if (IS_ERR(entry)) | |
993 | return PTR_ERR(entry); | |
6f2fad74 | 994 | |
5874583d | 995 | return snprintf(sysfsbuf, PAGE_SIZE, "%s\n", entry->type); |
6f2fad74 NB |
996 | } |
997 | ||
998 | static ssize_t applesmc_key_at_index_name_show(struct device *dev, | |
999 | struct device_attribute *attr, char *sysfsbuf) | |
1000 | { | |
5874583d | 1001 | const struct applesmc_entry *entry; |
6f2fad74 | 1002 | |
5874583d HR |
1003 | entry = applesmc_get_entry_by_index(key_at_index); |
1004 | if (IS_ERR(entry)) | |
1005 | return PTR_ERR(entry); | |
6f2fad74 | 1006 | |
5874583d | 1007 | return snprintf(sysfsbuf, PAGE_SIZE, "%s\n", entry->key); |
6f2fad74 NB |
1008 | } |
1009 | ||
1010 | static ssize_t applesmc_key_at_index_show(struct device *dev, | |
1011 | struct device_attribute *attr, char *sysfsbuf) | |
1012 | { | |
1013 | return snprintf(sysfsbuf, PAGE_SIZE, "%d\n", key_at_index); | |
1014 | } | |
1015 | ||
1016 | static ssize_t applesmc_key_at_index_store(struct device *dev, | |
1017 | struct device_attribute *attr, const char *sysfsbuf, size_t count) | |
1018 | { | |
5874583d | 1019 | unsigned long newkey; |
6f2fad74 | 1020 | |
179c4fdb | 1021 | if (kstrtoul(sysfsbuf, 10, &newkey) < 0 |
5874583d HR |
1022 | || newkey >= smcreg.key_count) |
1023 | return -EINVAL; | |
6f2fad74 | 1024 | |
5874583d | 1025 | key_at_index = newkey; |
6f2fad74 NB |
1026 | return count; |
1027 | } | |
1028 | ||
1029 | static struct led_classdev applesmc_backlight = { | |
6c152bee | 1030 | .name = "smc::kbd_backlight", |
6f2fad74 NB |
1031 | .default_trigger = "nand-disk", |
1032 | .brightness_set = applesmc_brightness_set, | |
1033 | }; | |
1034 | ||
0b0b5dff HR |
1035 | static struct applesmc_node_group info_group[] = { |
1036 | { "name", applesmc_name_show }, | |
1037 | { "key_count", applesmc_key_count_show }, | |
1038 | { "key_at_index", applesmc_key_at_index_show, applesmc_key_at_index_store }, | |
1039 | { "key_at_index_name", applesmc_key_at_index_name_show }, | |
1040 | { "key_at_index_type", applesmc_key_at_index_type_show }, | |
1041 | { "key_at_index_data_length", applesmc_key_at_index_data_length_show }, | |
1042 | { "key_at_index_data", applesmc_key_at_index_read_show }, | |
1043 | { } | |
6f2fad74 NB |
1044 | }; |
1045 | ||
0b0b5dff HR |
1046 | static struct applesmc_node_group accelerometer_group[] = { |
1047 | { "position", applesmc_position_show }, | |
1048 | { "calibrate", applesmc_calibrate_show, applesmc_calibrate_store }, | |
1049 | { } | |
6f2fad74 NB |
1050 | }; |
1051 | ||
0b0b5dff HR |
1052 | static struct applesmc_node_group light_sensor_group[] = { |
1053 | { "light", applesmc_light_show }, | |
1054 | { } | |
1055 | }; | |
6f2fad74 | 1056 | |
3eba2bf7 HR |
1057 | static struct applesmc_node_group fan_group[] = { |
1058 | { "fan%d_label", applesmc_show_fan_position }, | |
1059 | { "fan%d_input", applesmc_show_fan_speed, NULL, 0 }, | |
1060 | { "fan%d_min", applesmc_show_fan_speed, applesmc_store_fan_speed, 1 }, | |
1061 | { "fan%d_max", applesmc_show_fan_speed, NULL, 2 }, | |
1062 | { "fan%d_safe", applesmc_show_fan_speed, NULL, 3 }, | |
1063 | { "fan%d_output", applesmc_show_fan_speed, applesmc_store_fan_speed, 4 }, | |
1064 | { "fan%d_manual", applesmc_show_fan_manual, applesmc_store_fan_manual }, | |
1065 | { } | |
6f2fad74 NB |
1066 | }; |
1067 | ||
9792dadf HR |
1068 | static struct applesmc_node_group temp_group[] = { |
1069 | { "temp%d_label", applesmc_show_sensor_label }, | |
1070 | { "temp%d_input", applesmc_show_temperature }, | |
1071 | { } | |
fa5575cf AM |
1072 | }; |
1073 | ||
6f2fad74 NB |
1074 | /* Module stuff */ |
1075 | ||
9792dadf HR |
1076 | /* |
1077 | * applesmc_destroy_nodes - remove files and free associated memory | |
1078 | */ | |
1079 | static void applesmc_destroy_nodes(struct applesmc_node_group *groups) | |
1080 | { | |
1081 | struct applesmc_node_group *grp; | |
1082 | struct applesmc_dev_attr *node; | |
1083 | ||
1084 | for (grp = groups; grp->nodes; grp++) { | |
1085 | for (node = grp->nodes; node->sda.dev_attr.attr.name; node++) | |
1086 | sysfs_remove_file(&pdev->dev.kobj, | |
1087 | &node->sda.dev_attr.attr); | |
1088 | kfree(grp->nodes); | |
1089 | grp->nodes = NULL; | |
1090 | } | |
1091 | } | |
1092 | ||
1093 | /* | |
1094 | * applesmc_create_nodes - create a two-dimensional group of sysfs files | |
1095 | */ | |
1096 | static int applesmc_create_nodes(struct applesmc_node_group *groups, int num) | |
1097 | { | |
1098 | struct applesmc_node_group *grp; | |
1099 | struct applesmc_dev_attr *node; | |
1100 | struct attribute *attr; | |
1101 | int ret, i; | |
1102 | ||
1103 | for (grp = groups; grp->format; grp++) { | |
1104 | grp->nodes = kcalloc(num + 1, sizeof(*node), GFP_KERNEL); | |
1105 | if (!grp->nodes) { | |
1106 | ret = -ENOMEM; | |
1107 | goto out; | |
1108 | } | |
1109 | for (i = 0; i < num; i++) { | |
1110 | node = &grp->nodes[i]; | |
1009ccdc GR |
1111 | scnprintf(node->name, sizeof(node->name), grp->format, |
1112 | i + 1); | |
3eba2bf7 | 1113 | node->sda.index = (grp->option << 16) | (i & 0xffff); |
9792dadf HR |
1114 | node->sda.dev_attr.show = grp->show; |
1115 | node->sda.dev_attr.store = grp->store; | |
1116 | attr = &node->sda.dev_attr.attr; | |
9d1f8a40 | 1117 | sysfs_attr_init(attr); |
9792dadf | 1118 | attr->name = node->name; |
71ee4a40 | 1119 | attr->mode = 0444 | (grp->store ? 0200 : 0); |
9792dadf HR |
1120 | ret = sysfs_create_file(&pdev->dev.kobj, attr); |
1121 | if (ret) { | |
1122 | attr->name = NULL; | |
1123 | goto out; | |
1124 | } | |
1125 | } | |
1126 | } | |
1127 | ||
1128 | return 0; | |
1129 | out: | |
1130 | applesmc_destroy_nodes(groups); | |
1131 | return ret; | |
1132 | } | |
1133 | ||
0c6cac7a | 1134 | /* Create accelerometer resources */ |
6f2fad74 NB |
1135 | static int applesmc_create_accelerometer(void) |
1136 | { | |
d5cf2b99 | 1137 | struct input_dev *idev; |
6f2fad74 NB |
1138 | int ret; |
1139 | ||
0b0b5dff HR |
1140 | if (!smcreg.has_accelerometer) |
1141 | return 0; | |
1142 | ||
1143 | ret = applesmc_create_nodes(accelerometer_group, 1); | |
6f2fad74 NB |
1144 | if (ret) |
1145 | goto out; | |
1146 | ||
d5cf2b99 | 1147 | applesmc_idev = input_allocate_polled_device(); |
6f2fad74 NB |
1148 | if (!applesmc_idev) { |
1149 | ret = -ENOMEM; | |
1150 | goto out_sysfs; | |
1151 | } | |
1152 | ||
d5cf2b99 DT |
1153 | applesmc_idev->poll = applesmc_idev_poll; |
1154 | applesmc_idev->poll_interval = APPLESMC_POLL_INTERVAL; | |
1155 | ||
6f2fad74 NB |
1156 | /* initial calibrate for the input device */ |
1157 | applesmc_calibrate(); | |
1158 | ||
d5cf2b99 DT |
1159 | /* initialize the input device */ |
1160 | idev = applesmc_idev->input; | |
1161 | idev->name = "applesmc"; | |
1162 | idev->id.bustype = BUS_HOST; | |
1163 | idev->dev.parent = &pdev->dev; | |
7b19ada2 | 1164 | idev->evbit[0] = BIT_MASK(EV_ABS); |
d5cf2b99 | 1165 | input_set_abs_params(idev, ABS_X, |
6f2fad74 | 1166 | -256, 256, APPLESMC_INPUT_FUZZ, APPLESMC_INPUT_FLAT); |
d5cf2b99 | 1167 | input_set_abs_params(idev, ABS_Y, |
6f2fad74 NB |
1168 | -256, 256, APPLESMC_INPUT_FUZZ, APPLESMC_INPUT_FLAT); |
1169 | ||
d5cf2b99 | 1170 | ret = input_register_polled_device(applesmc_idev); |
6f2fad74 NB |
1171 | if (ret) |
1172 | goto out_idev; | |
1173 | ||
6f2fad74 NB |
1174 | return 0; |
1175 | ||
1176 | out_idev: | |
d5cf2b99 | 1177 | input_free_polled_device(applesmc_idev); |
6f2fad74 NB |
1178 | |
1179 | out_sysfs: | |
0b0b5dff | 1180 | applesmc_destroy_nodes(accelerometer_group); |
6f2fad74 NB |
1181 | |
1182 | out: | |
1ee7c71b | 1183 | pr_warn("driver init failed (ret=%d)!\n", ret); |
6f2fad74 NB |
1184 | return ret; |
1185 | } | |
1186 | ||
0c6cac7a | 1187 | /* Release all resources used by the accelerometer */ |
6f2fad74 NB |
1188 | static void applesmc_release_accelerometer(void) |
1189 | { | |
0b0b5dff HR |
1190 | if (!smcreg.has_accelerometer) |
1191 | return; | |
d5cf2b99 DT |
1192 | input_unregister_polled_device(applesmc_idev); |
1193 | input_free_polled_device(applesmc_idev); | |
0b0b5dff | 1194 | applesmc_destroy_nodes(accelerometer_group); |
6f2fad74 | 1195 | } |
0b0b5dff HR |
1196 | |
1197 | static int applesmc_create_light_sensor(void) | |
1198 | { | |
1199 | if (!smcreg.num_light_sensors) | |
1200 | return 0; | |
1201 | return applesmc_create_nodes(light_sensor_group, 1); | |
1202 | } | |
1203 | ||
1204 | static void applesmc_release_light_sensor(void) | |
1205 | { | |
1206 | if (!smcreg.num_light_sensors) | |
1207 | return; | |
1208 | applesmc_destroy_nodes(light_sensor_group); | |
1209 | } | |
1210 | ||
1211 | static int applesmc_create_key_backlight(void) | |
1212 | { | |
1213 | if (!smcreg.has_key_backlight) | |
1214 | return 0; | |
1215 | applesmc_led_wq = create_singlethread_workqueue("applesmc-led"); | |
1216 | if (!applesmc_led_wq) | |
1217 | return -ENOMEM; | |
1218 | return led_classdev_register(&pdev->dev, &applesmc_backlight); | |
1219 | } | |
1220 | ||
1221 | static void applesmc_release_key_backlight(void) | |
1222 | { | |
1223 | if (!smcreg.has_key_backlight) | |
1224 | return; | |
1225 | led_classdev_unregister(&applesmc_backlight); | |
1226 | destroy_workqueue(applesmc_led_wq); | |
1227 | } | |
1228 | ||
40ef06f1 HR |
1229 | static int applesmc_dmi_match(const struct dmi_system_id *id) |
1230 | { | |
1231 | return 1; | |
1232 | } | |
6f2fad74 | 1233 | |
85ebfd3e GR |
1234 | /* |
1235 | * Note that DMI_MATCH(...,"MacBook") will match "MacBookPro1,1". | |
1236 | * So we need to put "Apple MacBook Pro" before "Apple MacBook". | |
1237 | */ | |
6faadbbb | 1238 | static const struct dmi_system_id applesmc_whitelist[] __initconst = { |
f5274c97 HR |
1239 | { applesmc_dmi_match, "Apple MacBook Air", { |
1240 | DMI_MATCH(DMI_BOARD_VENDOR, "Apple"), | |
1241 | DMI_MATCH(DMI_PRODUCT_NAME, "MacBookAir") }, | |
40ef06f1 | 1242 | }, |
6f2fad74 | 1243 | { applesmc_dmi_match, "Apple MacBook Pro", { |
2bfe8148 GR |
1244 | DMI_MATCH(DMI_BOARD_VENDOR, "Apple"), |
1245 | DMI_MATCH(DMI_PRODUCT_NAME, "MacBookPro") }, | |
40ef06f1 | 1246 | }, |
cd19ba13 | 1247 | { applesmc_dmi_match, "Apple MacBook", { |
2bfe8148 GR |
1248 | DMI_MATCH(DMI_BOARD_VENDOR, "Apple"), |
1249 | DMI_MATCH(DMI_PRODUCT_NAME, "MacBook") }, | |
40ef06f1 | 1250 | }, |
6f2fad74 | 1251 | { applesmc_dmi_match, "Apple Macmini", { |
2bfe8148 GR |
1252 | DMI_MATCH(DMI_BOARD_VENDOR, "Apple"), |
1253 | DMI_MATCH(DMI_PRODUCT_NAME, "Macmini") }, | |
40ef06f1 | 1254 | }, |
45a3a36b HR |
1255 | { applesmc_dmi_match, "Apple MacPro", { |
1256 | DMI_MATCH(DMI_BOARD_VENDOR, "Apple"), | |
1257 | DMI_MATCH(DMI_PRODUCT_NAME, "MacPro") }, | |
40ef06f1 | 1258 | }, |
9f86f28d | 1259 | { applesmc_dmi_match, "Apple iMac", { |
2bfe8148 GR |
1260 | DMI_MATCH(DMI_BOARD_VENDOR, "Apple"), |
1261 | DMI_MATCH(DMI_PRODUCT_NAME, "iMac") }, | |
40ef06f1 | 1262 | }, |
6f2fad74 NB |
1263 | { .ident = NULL } |
1264 | }; | |
1265 | ||
1266 | static int __init applesmc_init(void) | |
1267 | { | |
1268 | int ret; | |
6f2fad74 | 1269 | |
6f2fad74 | 1270 | if (!dmi_check_system(applesmc_whitelist)) { |
1ee7c71b | 1271 | pr_warn("supported laptop not found!\n"); |
6f2fad74 NB |
1272 | ret = -ENODEV; |
1273 | goto out; | |
1274 | } | |
1275 | ||
1276 | if (!request_region(APPLESMC_DATA_PORT, APPLESMC_NR_PORTS, | |
1277 | "applesmc")) { | |
1278 | ret = -ENXIO; | |
1279 | goto out; | |
1280 | } | |
1281 | ||
1282 | ret = platform_driver_register(&applesmc_driver); | |
1283 | if (ret) | |
1284 | goto out_region; | |
1285 | ||
ddfbf2af JD |
1286 | pdev = platform_device_register_simple("applesmc", APPLESMC_DATA_PORT, |
1287 | NULL, 0); | |
6f2fad74 NB |
1288 | if (IS_ERR(pdev)) { |
1289 | ret = PTR_ERR(pdev); | |
1290 | goto out_driver; | |
1291 | } | |
1292 | ||
5874583d HR |
1293 | /* create register cache */ |
1294 | ret = applesmc_init_smcreg(); | |
6996abf0 NB |
1295 | if (ret) |
1296 | goto out_device; | |
fa74419b | 1297 | |
0b0b5dff | 1298 | ret = applesmc_create_nodes(info_group, 1); |
5874583d HR |
1299 | if (ret) |
1300 | goto out_smcreg; | |
1301 | ||
3eba2bf7 HR |
1302 | ret = applesmc_create_nodes(fan_group, smcreg.fan_count); |
1303 | if (ret) | |
1304 | goto out_info; | |
6f2fad74 | 1305 | |
e30bca12 | 1306 | ret = applesmc_create_nodes(temp_group, smcreg.index_count); |
9792dadf HR |
1307 | if (ret) |
1308 | goto out_fans; | |
6f2fad74 | 1309 | |
0b0b5dff HR |
1310 | ret = applesmc_create_accelerometer(); |
1311 | if (ret) | |
1312 | goto out_temperature; | |
6f2fad74 | 1313 | |
0b0b5dff HR |
1314 | ret = applesmc_create_light_sensor(); |
1315 | if (ret) | |
1316 | goto out_accelerometer; | |
6f2fad74 | 1317 | |
0b0b5dff HR |
1318 | ret = applesmc_create_key_backlight(); |
1319 | if (ret) | |
1320 | goto out_light_sysfs; | |
6f2fad74 | 1321 | |
1beeffe4 TJ |
1322 | hwmon_dev = hwmon_device_register(&pdev->dev); |
1323 | if (IS_ERR(hwmon_dev)) { | |
1324 | ret = PTR_ERR(hwmon_dev); | |
6f2fad74 NB |
1325 | goto out_light_ledclass; |
1326 | } | |
1327 | ||
6f2fad74 NB |
1328 | return 0; |
1329 | ||
1330 | out_light_ledclass: | |
0b0b5dff | 1331 | applesmc_release_key_backlight(); |
6f2fad74 | 1332 | out_light_sysfs: |
0b0b5dff | 1333 | applesmc_release_light_sensor(); |
6f2fad74 | 1334 | out_accelerometer: |
0b0b5dff | 1335 | applesmc_release_accelerometer(); |
6f2fad74 | 1336 | out_temperature: |
9792dadf | 1337 | applesmc_destroy_nodes(temp_group); |
0559a538 | 1338 | out_fans: |
3eba2bf7 HR |
1339 | applesmc_destroy_nodes(fan_group); |
1340 | out_info: | |
0b0b5dff | 1341 | applesmc_destroy_nodes(info_group); |
5874583d HR |
1342 | out_smcreg: |
1343 | applesmc_destroy_smcreg(); | |
6f2fad74 NB |
1344 | out_device: |
1345 | platform_device_unregister(pdev); | |
1346 | out_driver: | |
1347 | platform_driver_unregister(&applesmc_driver); | |
1348 | out_region: | |
1349 | release_region(APPLESMC_DATA_PORT, APPLESMC_NR_PORTS); | |
1350 | out: | |
1ee7c71b | 1351 | pr_warn("driver init failed (ret=%d)!\n", ret); |
6f2fad74 NB |
1352 | return ret; |
1353 | } | |
1354 | ||
1355 | static void __exit applesmc_exit(void) | |
1356 | { | |
1beeffe4 | 1357 | hwmon_device_unregister(hwmon_dev); |
0b0b5dff HR |
1358 | applesmc_release_key_backlight(); |
1359 | applesmc_release_light_sensor(); | |
1360 | applesmc_release_accelerometer(); | |
9792dadf | 1361 | applesmc_destroy_nodes(temp_group); |
3eba2bf7 | 1362 | applesmc_destroy_nodes(fan_group); |
0b0b5dff | 1363 | applesmc_destroy_nodes(info_group); |
5874583d | 1364 | applesmc_destroy_smcreg(); |
6f2fad74 NB |
1365 | platform_device_unregister(pdev); |
1366 | platform_driver_unregister(&applesmc_driver); | |
1367 | release_region(APPLESMC_DATA_PORT, APPLESMC_NR_PORTS); | |
6f2fad74 NB |
1368 | } |
1369 | ||
1370 | module_init(applesmc_init); | |
1371 | module_exit(applesmc_exit); | |
1372 | ||
1373 | MODULE_AUTHOR("Nicolas Boichat"); | |
1374 | MODULE_DESCRIPTION("Apple SMC"); | |
1375 | MODULE_LICENSE("GPL v2"); | |
dc924efb | 1376 | MODULE_DEVICE_TABLE(dmi, applesmc_whitelist); |