Commit | Line | Data |
---|---|---|
6f2fad74 NB |
1 | /* |
2 | * drivers/hwmon/applesmc.c - driver for Apple's SMC (accelerometer, temperature | |
3 | * sensors, fan control, keyboard backlight control) used in Intel-based Apple | |
4 | * computers. | |
5 | * | |
6 | * Copyright (C) 2007 Nicolas Boichat <nicolas@boichat.ch> | |
41e71f97 | 7 | * Copyright (C) 2010 Henrik Rydberg <rydberg@euromail.se> |
6f2fad74 NB |
8 | * |
9 | * Based on hdaps.c driver: | |
10 | * Copyright (C) 2005 Robert Love <rml@novell.com> | |
11 | * Copyright (C) 2005 Jesper Juhl <jesper.juhl@gmail.com> | |
12 | * | |
13 | * Fan control based on smcFanControl: | |
14 | * Copyright (C) 2006 Hendrik Holtmann <holtmann@mac.com> | |
15 | * | |
16 | * This program is free software; you can redistribute it and/or modify it | |
17 | * under the terms of the GNU General Public License v2 as published by the | |
18 | * Free Software Foundation. | |
19 | * | |
20 | * This program is distributed in the hope that it will be useful, but WITHOUT | |
21 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
22 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
23 | * more details. | |
24 | * | |
25 | * You should have received a copy of the GNU General Public License along with | |
26 | * this program; if not, write to the Free Software Foundation, Inc., | |
27 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA | |
28 | */ | |
29 | ||
1ee7c71b JP |
30 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
31 | ||
6f2fad74 NB |
32 | #include <linux/delay.h> |
33 | #include <linux/platform_device.h> | |
d5cf2b99 | 34 | #include <linux/input-polldev.h> |
6f2fad74 | 35 | #include <linux/kernel.h> |
5874583d | 36 | #include <linux/slab.h> |
6f2fad74 NB |
37 | #include <linux/module.h> |
38 | #include <linux/timer.h> | |
39 | #include <linux/dmi.h> | |
40 | #include <linux/mutex.h> | |
41 | #include <linux/hwmon-sysfs.h> | |
6055fae8 | 42 | #include <linux/io.h> |
6f2fad74 NB |
43 | #include <linux/leds.h> |
44 | #include <linux/hwmon.h> | |
45 | #include <linux/workqueue.h> | |
46 | ||
47 | /* data port used by Apple SMC */ | |
48 | #define APPLESMC_DATA_PORT 0x300 | |
49 | /* command/status port used by Apple SMC */ | |
50 | #define APPLESMC_CMD_PORT 0x304 | |
51 | ||
52 | #define APPLESMC_NR_PORTS 32 /* 0x300-0x31f */ | |
53 | ||
54 | #define APPLESMC_MAX_DATA_LENGTH 32 | |
55 | ||
5874583d | 56 | /* wait up to 32 ms for a status change. */ |
8c9398d1 HR |
57 | #define APPLESMC_MIN_WAIT 0x0040 |
58 | #define APPLESMC_MAX_WAIT 0x8000 | |
59 | ||
6f2fad74 NB |
60 | #define APPLESMC_STATUS_MASK 0x0f |
61 | #define APPLESMC_READ_CMD 0x10 | |
62 | #define APPLESMC_WRITE_CMD 0x11 | |
63 | #define APPLESMC_GET_KEY_BY_INDEX_CMD 0x12 | |
64 | #define APPLESMC_GET_KEY_TYPE_CMD 0x13 | |
65 | ||
66 | #define KEY_COUNT_KEY "#KEY" /* r-o ui32 */ | |
67 | ||
8bd1a12a HR |
68 | #define LIGHT_SENSOR_LEFT_KEY "ALV0" /* r-o {alv (6-10 bytes) */ |
69 | #define LIGHT_SENSOR_RIGHT_KEY "ALV1" /* r-o {alv (6-10 bytes) */ | |
d5cf2b99 | 70 | #define BACKLIGHT_KEY "LKSB" /* w-o {lkb (2 bytes) */ |
6f2fad74 | 71 | |
d5cf2b99 | 72 | #define CLAMSHELL_KEY "MSLD" /* r-o ui8 (unused) */ |
6f2fad74 NB |
73 | |
74 | #define MOTION_SENSOR_X_KEY "MO_X" /* r-o sp78 (2 bytes) */ | |
75 | #define MOTION_SENSOR_Y_KEY "MO_Y" /* r-o sp78 (2 bytes) */ | |
76 | #define MOTION_SENSOR_Z_KEY "MO_Z" /* r-o sp78 (2 bytes) */ | |
77 | #define MOTION_SENSOR_KEY "MOCN" /* r/w ui16 */ | |
78 | ||
79 | #define FANS_COUNT "FNum" /* r-o ui8 */ | |
80 | #define FANS_MANUAL "FS! " /* r-w ui16 */ | |
3eba2bf7 | 81 | #define FAN_ID_FMT "F%dID" /* r-o char[16] */ |
6f2fad74 | 82 | |
6f2fad74 | 83 | /* List of keys used to read/write fan speeds */ |
3eba2bf7 HR |
84 | static const char *const fan_speed_fmt[] = { |
85 | "F%dAc", /* actual speed */ | |
86 | "F%dMn", /* minimum speed (rw) */ | |
87 | "F%dMx", /* maximum speed */ | |
88 | "F%dSf", /* safe speed - not all models */ | |
89 | "F%dTg", /* target speed (manual: rw) */ | |
6f2fad74 NB |
90 | }; |
91 | ||
92 | #define INIT_TIMEOUT_MSECS 5000 /* wait up to 5s for device init ... */ | |
93 | #define INIT_WAIT_MSECS 50 /* ... in 50ms increments */ | |
94 | ||
d5cf2b99 | 95 | #define APPLESMC_POLL_INTERVAL 50 /* msecs */ |
6f2fad74 NB |
96 | #define APPLESMC_INPUT_FUZZ 4 /* input event threshold */ |
97 | #define APPLESMC_INPUT_FLAT 4 | |
98 | ||
99 | #define SENSOR_X 0 | |
100 | #define SENSOR_Y 1 | |
101 | #define SENSOR_Z 2 | |
102 | ||
3eba2bf7 HR |
103 | #define to_index(attr) (to_sensor_dev_attr(attr)->index & 0xffff) |
104 | #define to_option(attr) (to_sensor_dev_attr(attr)->index >> 16) | |
9792dadf | 105 | |
9792dadf HR |
106 | /* Dynamic device node attributes */ |
107 | struct applesmc_dev_attr { | |
108 | struct sensor_device_attribute sda; /* hwmon attributes */ | |
109 | char name[32]; /* room for node file name */ | |
110 | }; | |
111 | ||
112 | /* Dynamic device node group */ | |
113 | struct applesmc_node_group { | |
114 | char *format; /* format string */ | |
115 | void *show; /* show function */ | |
116 | void *store; /* store function */ | |
3eba2bf7 | 117 | int option; /* function argument */ |
9792dadf HR |
118 | struct applesmc_dev_attr *nodes; /* dynamic node array */ |
119 | }; | |
120 | ||
5874583d HR |
121 | /* AppleSMC entry - cached register information */ |
122 | struct applesmc_entry { | |
123 | char key[5]; /* four-letter key code */ | |
124 | u8 valid; /* set when entry is successfully read once */ | |
125 | u8 len; /* bounded by APPLESMC_MAX_DATA_LENGTH */ | |
126 | char type[5]; /* four-letter type code */ | |
127 | u8 flags; /* 0x10: func; 0x40: write; 0x80: read */ | |
128 | }; | |
129 | ||
130 | /* Register lookup and registers common to all SMCs */ | |
131 | static struct applesmc_registers { | |
132 | struct mutex mutex; /* register read/write mutex */ | |
133 | unsigned int key_count; /* number of SMC registers */ | |
3eba2bf7 | 134 | unsigned int fan_count; /* number of fans */ |
9792dadf HR |
135 | unsigned int temp_count; /* number of temperature registers */ |
136 | unsigned int temp_begin; /* temperature lower index bound */ | |
137 | unsigned int temp_end; /* temperature upper index bound */ | |
40ef06f1 HR |
138 | int num_light_sensors; /* number of light sensors */ |
139 | bool has_accelerometer; /* has motion sensor */ | |
140 | bool has_key_backlight; /* has keyboard backlight */ | |
5874583d HR |
141 | bool init_complete; /* true when fully initialized */ |
142 | struct applesmc_entry *cache; /* cached key entries */ | |
143 | } smcreg = { | |
144 | .mutex = __MUTEX_INITIALIZER(smcreg.mutex), | |
145 | }; | |
146 | ||
6f2fad74 NB |
147 | static const int debug; |
148 | static struct platform_device *pdev; | |
149 | static s16 rest_x; | |
150 | static s16 rest_y; | |
a976f150 HR |
151 | static u8 backlight_state[2]; |
152 | ||
1beeffe4 | 153 | static struct device *hwmon_dev; |
d5cf2b99 | 154 | static struct input_polled_dev *applesmc_idev; |
6f2fad74 | 155 | |
6f2fad74 NB |
156 | /* |
157 | * Last index written to key_at_index sysfs file, and value to use for all other | |
158 | * key_at_index_* sysfs files. | |
159 | */ | |
160 | static unsigned int key_at_index; | |
161 | ||
162 | static struct workqueue_struct *applesmc_led_wq; | |
163 | ||
164 | /* | |
8c9398d1 | 165 | * __wait_status - Wait up to 32ms for the status port to get a certain value |
6f2fad74 NB |
166 | * (masked with 0x0f), returning zero if the value is obtained. Callers must |
167 | * hold applesmc_lock. | |
168 | */ | |
169 | static int __wait_status(u8 val) | |
170 | { | |
8c9398d1 | 171 | int us; |
6f2fad74 NB |
172 | |
173 | val = val & APPLESMC_STATUS_MASK; | |
174 | ||
8c9398d1 HR |
175 | for (us = APPLESMC_MIN_WAIT; us < APPLESMC_MAX_WAIT; us <<= 1) { |
176 | udelay(us); | |
2bfe8148 | 177 | if ((inb(APPLESMC_CMD_PORT) & APPLESMC_STATUS_MASK) == val) |
6f2fad74 | 178 | return 0; |
6f2fad74 NB |
179 | } |
180 | ||
6f2fad74 NB |
181 | return -EIO; |
182 | } | |
183 | ||
84d2d7f2 HR |
184 | /* |
185 | * special treatment of command port - on newer macbooks, it seems necessary | |
186 | * to resend the command byte before polling the status again. Callers must | |
187 | * hold applesmc_lock. | |
188 | */ | |
189 | static int send_command(u8 cmd) | |
190 | { | |
8c9398d1 HR |
191 | int us; |
192 | for (us = APPLESMC_MIN_WAIT; us < APPLESMC_MAX_WAIT; us <<= 1) { | |
84d2d7f2 | 193 | outb(cmd, APPLESMC_CMD_PORT); |
8c9398d1 | 194 | udelay(us); |
84d2d7f2 HR |
195 | if ((inb(APPLESMC_CMD_PORT) & APPLESMC_STATUS_MASK) == 0x0c) |
196 | return 0; | |
84d2d7f2 | 197 | } |
84d2d7f2 HR |
198 | return -EIO; |
199 | } | |
200 | ||
5874583d | 201 | static int send_argument(const char *key) |
6f2fad74 NB |
202 | { |
203 | int i; | |
204 | ||
6f2fad74 NB |
205 | for (i = 0; i < 4; i++) { |
206 | outb(key[i], APPLESMC_DATA_PORT); | |
207 | if (__wait_status(0x04)) | |
208 | return -EIO; | |
209 | } | |
5874583d HR |
210 | return 0; |
211 | } | |
212 | ||
213 | static int read_smc(u8 cmd, const char *key, u8 *buffer, u8 len) | |
214 | { | |
215 | int i; | |
216 | ||
217 | if (send_command(cmd) || send_argument(key)) { | |
218 | pr_warn("%s: read arg fail\n", key); | |
219 | return -EIO; | |
220 | } | |
6f2fad74 NB |
221 | |
222 | outb(len, APPLESMC_DATA_PORT); | |
6f2fad74 NB |
223 | |
224 | for (i = 0; i < len; i++) { | |
5874583d HR |
225 | if (__wait_status(0x05)) { |
226 | pr_warn("%s: read data fail\n", key); | |
6f2fad74 | 227 | return -EIO; |
5874583d | 228 | } |
6f2fad74 | 229 | buffer[i] = inb(APPLESMC_DATA_PORT); |
6f2fad74 | 230 | } |
6f2fad74 NB |
231 | |
232 | return 0; | |
233 | } | |
234 | ||
5874583d | 235 | static int write_smc(u8 cmd, const char *key, const u8 *buffer, u8 len) |
6f2fad74 NB |
236 | { |
237 | int i; | |
238 | ||
5874583d HR |
239 | if (send_command(cmd) || send_argument(key)) { |
240 | pr_warn("%s: write arg fail\n", key); | |
6f2fad74 | 241 | return -EIO; |
6f2fad74 NB |
242 | } |
243 | ||
244 | outb(len, APPLESMC_DATA_PORT); | |
245 | ||
246 | for (i = 0; i < len; i++) { | |
5874583d HR |
247 | if (__wait_status(0x04)) { |
248 | pr_warn("%s: write data fail\n", key); | |
6f2fad74 | 249 | return -EIO; |
5874583d | 250 | } |
6f2fad74 NB |
251 | outb(buffer[i], APPLESMC_DATA_PORT); |
252 | } | |
253 | ||
254 | return 0; | |
255 | } | |
256 | ||
5874583d HR |
257 | static int read_register_count(unsigned int *count) |
258 | { | |
259 | __be32 be; | |
260 | int ret; | |
261 | ||
262 | ret = read_smc(APPLESMC_READ_CMD, KEY_COUNT_KEY, (u8 *)&be, 4); | |
263 | if (ret) | |
264 | return ret; | |
265 | ||
266 | *count = be32_to_cpu(be); | |
267 | return 0; | |
268 | } | |
269 | ||
6f2fad74 | 270 | /* |
5874583d HR |
271 | * Serialized I/O |
272 | * | |
273 | * Returns zero on success or a negative error on failure. | |
274 | * All functions below are concurrency safe - callers should NOT hold lock. | |
6f2fad74 | 275 | */ |
5874583d HR |
276 | |
277 | static int applesmc_read_entry(const struct applesmc_entry *entry, | |
278 | u8 *buf, u8 len) | |
6f2fad74 | 279 | { |
5874583d | 280 | int ret; |
6f2fad74 | 281 | |
5874583d HR |
282 | if (entry->len != len) |
283 | return -EINVAL; | |
284 | mutex_lock(&smcreg.mutex); | |
285 | ret = read_smc(APPLESMC_READ_CMD, entry->key, buf, len); | |
286 | mutex_unlock(&smcreg.mutex); | |
6f2fad74 | 287 | |
5874583d HR |
288 | return ret; |
289 | } | |
290 | ||
291 | static int applesmc_write_entry(const struct applesmc_entry *entry, | |
292 | const u8 *buf, u8 len) | |
293 | { | |
294 | int ret; | |
295 | ||
296 | if (entry->len != len) | |
297 | return -EINVAL; | |
298 | mutex_lock(&smcreg.mutex); | |
299 | ret = write_smc(APPLESMC_WRITE_CMD, entry->key, buf, len); | |
300 | mutex_unlock(&smcreg.mutex); | |
301 | return ret; | |
302 | } | |
303 | ||
304 | static const struct applesmc_entry *applesmc_get_entry_by_index(int index) | |
305 | { | |
306 | struct applesmc_entry *cache = &smcreg.cache[index]; | |
307 | u8 key[4], info[6]; | |
308 | __be32 be; | |
309 | int ret = 0; | |
310 | ||
311 | if (cache->valid) | |
312 | return cache; | |
313 | ||
314 | mutex_lock(&smcreg.mutex); | |
315 | ||
316 | if (cache->valid) | |
317 | goto out; | |
318 | be = cpu_to_be32(index); | |
319 | ret = read_smc(APPLESMC_GET_KEY_BY_INDEX_CMD, (u8 *)&be, key, 4); | |
320 | if (ret) | |
321 | goto out; | |
322 | ret = read_smc(APPLESMC_GET_KEY_TYPE_CMD, key, info, 6); | |
323 | if (ret) | |
324 | goto out; | |
325 | ||
326 | memcpy(cache->key, key, 4); | |
327 | cache->len = info[0]; | |
328 | memcpy(cache->type, &info[1], 4); | |
329 | cache->flags = info[5]; | |
330 | cache->valid = 1; | |
331 | ||
332 | out: | |
333 | mutex_unlock(&smcreg.mutex); | |
334 | if (ret) | |
335 | return ERR_PTR(ret); | |
336 | return cache; | |
337 | } | |
338 | ||
339 | static int applesmc_get_lower_bound(unsigned int *lo, const char *key) | |
340 | { | |
341 | int begin = 0, end = smcreg.key_count; | |
342 | const struct applesmc_entry *entry; | |
343 | ||
344 | while (begin != end) { | |
345 | int middle = begin + (end - begin) / 2; | |
346 | entry = applesmc_get_entry_by_index(middle); | |
347 | if (IS_ERR(entry)) | |
348 | return PTR_ERR(entry); | |
349 | if (strcmp(entry->key, key) < 0) | |
350 | begin = middle + 1; | |
351 | else | |
352 | end = middle; | |
6f2fad74 NB |
353 | } |
354 | ||
5874583d HR |
355 | *lo = begin; |
356 | return 0; | |
357 | } | |
6f2fad74 | 358 | |
5874583d HR |
359 | static int applesmc_get_upper_bound(unsigned int *hi, const char *key) |
360 | { | |
361 | int begin = 0, end = smcreg.key_count; | |
362 | const struct applesmc_entry *entry; | |
363 | ||
364 | while (begin != end) { | |
365 | int middle = begin + (end - begin) / 2; | |
366 | entry = applesmc_get_entry_by_index(middle); | |
367 | if (IS_ERR(entry)) | |
368 | return PTR_ERR(entry); | |
369 | if (strcmp(key, entry->key) < 0) | |
370 | end = middle; | |
371 | else | |
372 | begin = middle + 1; | |
6f2fad74 | 373 | } |
6f2fad74 | 374 | |
5874583d | 375 | *hi = begin; |
6f2fad74 NB |
376 | return 0; |
377 | } | |
378 | ||
5874583d | 379 | static const struct applesmc_entry *applesmc_get_entry_by_key(const char *key) |
6f2fad74 | 380 | { |
5874583d HR |
381 | int begin, end; |
382 | int ret; | |
6f2fad74 | 383 | |
5874583d HR |
384 | ret = applesmc_get_lower_bound(&begin, key); |
385 | if (ret) | |
386 | return ERR_PTR(ret); | |
387 | ret = applesmc_get_upper_bound(&end, key); | |
388 | if (ret) | |
389 | return ERR_PTR(ret); | |
390 | if (end - begin != 1) | |
391 | return ERR_PTR(-EINVAL); | |
6f2fad74 | 392 | |
5874583d HR |
393 | return applesmc_get_entry_by_index(begin); |
394 | } | |
6f2fad74 | 395 | |
5874583d HR |
396 | static int applesmc_read_key(const char *key, u8 *buffer, u8 len) |
397 | { | |
398 | const struct applesmc_entry *entry; | |
6f2fad74 | 399 | |
5874583d HR |
400 | entry = applesmc_get_entry_by_key(key); |
401 | if (IS_ERR(entry)) | |
402 | return PTR_ERR(entry); | |
6f2fad74 | 403 | |
5874583d HR |
404 | return applesmc_read_entry(entry, buffer, len); |
405 | } | |
406 | ||
407 | static int applesmc_write_key(const char *key, const u8 *buffer, u8 len) | |
408 | { | |
409 | const struct applesmc_entry *entry; | |
410 | ||
411 | entry = applesmc_get_entry_by_key(key); | |
412 | if (IS_ERR(entry)) | |
413 | return PTR_ERR(entry); | |
414 | ||
415 | return applesmc_write_entry(entry, buffer, len); | |
6f2fad74 NB |
416 | } |
417 | ||
40ef06f1 HR |
418 | static int applesmc_has_key(const char *key, bool *value) |
419 | { | |
420 | const struct applesmc_entry *entry; | |
421 | ||
422 | entry = applesmc_get_entry_by_key(key); | |
423 | if (IS_ERR(entry) && PTR_ERR(entry) != -EINVAL) | |
424 | return PTR_ERR(entry); | |
425 | ||
426 | *value = !IS_ERR(entry); | |
427 | return 0; | |
428 | } | |
429 | ||
6f2fad74 | 430 | /* |
5874583d | 431 | * applesmc_read_motion_sensor - Read motion sensor (X, Y or Z). |
6f2fad74 | 432 | */ |
2bfe8148 | 433 | static int applesmc_read_motion_sensor(int index, s16 *value) |
6f2fad74 NB |
434 | { |
435 | u8 buffer[2]; | |
436 | int ret; | |
437 | ||
438 | switch (index) { | |
439 | case SENSOR_X: | |
440 | ret = applesmc_read_key(MOTION_SENSOR_X_KEY, buffer, 2); | |
441 | break; | |
442 | case SENSOR_Y: | |
443 | ret = applesmc_read_key(MOTION_SENSOR_Y_KEY, buffer, 2); | |
444 | break; | |
445 | case SENSOR_Z: | |
446 | ret = applesmc_read_key(MOTION_SENSOR_Z_KEY, buffer, 2); | |
447 | break; | |
448 | default: | |
449 | ret = -EINVAL; | |
450 | } | |
451 | ||
452 | *value = ((s16)buffer[0] << 8) | buffer[1]; | |
453 | ||
454 | return ret; | |
455 | } | |
456 | ||
457 | /* | |
2344cd0c | 458 | * applesmc_device_init - initialize the accelerometer. Can sleep. |
6f2fad74 | 459 | */ |
2344cd0c | 460 | static void applesmc_device_init(void) |
6f2fad74 | 461 | { |
2344cd0c | 462 | int total; |
6f2fad74 NB |
463 | u8 buffer[2]; |
464 | ||
40ef06f1 | 465 | if (!smcreg.has_accelerometer) |
2344cd0c | 466 | return; |
6f2fad74 | 467 | |
6f2fad74 | 468 | for (total = INIT_TIMEOUT_MSECS; total > 0; total -= INIT_WAIT_MSECS) { |
6f2fad74 | 469 | if (!applesmc_read_key(MOTION_SENSOR_KEY, buffer, 2) && |
2344cd0c | 470 | (buffer[0] != 0x00 || buffer[1] != 0x00)) |
5874583d | 471 | return; |
6f2fad74 NB |
472 | buffer[0] = 0xe0; |
473 | buffer[1] = 0x00; | |
474 | applesmc_write_key(MOTION_SENSOR_KEY, buffer, 2); | |
475 | msleep(INIT_WAIT_MSECS); | |
476 | } | |
477 | ||
1ee7c71b | 478 | pr_warn("failed to init the device\n"); |
6f2fad74 NB |
479 | } |
480 | ||
5874583d HR |
481 | /* |
482 | * applesmc_init_smcreg_try - Try to initialize register cache. Idempotent. | |
483 | */ | |
484 | static int applesmc_init_smcreg_try(void) | |
485 | { | |
486 | struct applesmc_registers *s = &smcreg; | |
40ef06f1 | 487 | bool left_light_sensor, right_light_sensor; |
3eba2bf7 | 488 | u8 tmp[1]; |
5874583d HR |
489 | int ret; |
490 | ||
491 | if (s->init_complete) | |
492 | return 0; | |
493 | ||
494 | ret = read_register_count(&s->key_count); | |
495 | if (ret) | |
496 | return ret; | |
497 | ||
498 | if (!s->cache) | |
499 | s->cache = kcalloc(s->key_count, sizeof(*s->cache), GFP_KERNEL); | |
500 | if (!s->cache) | |
501 | return -ENOMEM; | |
502 | ||
3eba2bf7 HR |
503 | ret = applesmc_read_key(FANS_COUNT, tmp, 1); |
504 | if (ret) | |
505 | return ret; | |
506 | s->fan_count = tmp[0]; | |
507 | ||
9792dadf HR |
508 | ret = applesmc_get_lower_bound(&s->temp_begin, "T"); |
509 | if (ret) | |
510 | return ret; | |
511 | ret = applesmc_get_lower_bound(&s->temp_end, "U"); | |
512 | if (ret) | |
513 | return ret; | |
514 | s->temp_count = s->temp_end - s->temp_begin; | |
515 | ||
40ef06f1 HR |
516 | ret = applesmc_has_key(LIGHT_SENSOR_LEFT_KEY, &left_light_sensor); |
517 | if (ret) | |
518 | return ret; | |
519 | ret = applesmc_has_key(LIGHT_SENSOR_RIGHT_KEY, &right_light_sensor); | |
520 | if (ret) | |
521 | return ret; | |
522 | ret = applesmc_has_key(MOTION_SENSOR_KEY, &s->has_accelerometer); | |
523 | if (ret) | |
524 | return ret; | |
525 | ret = applesmc_has_key(BACKLIGHT_KEY, &s->has_key_backlight); | |
526 | if (ret) | |
527 | return ret; | |
528 | ||
529 | s->num_light_sensors = left_light_sensor + right_light_sensor; | |
5874583d HR |
530 | s->init_complete = true; |
531 | ||
3eba2bf7 HR |
532 | pr_info("key=%d fan=%d temp=%d acc=%d lux=%d kbd=%d\n", |
533 | s->key_count, s->fan_count, s->temp_count, | |
40ef06f1 HR |
534 | s->has_accelerometer, |
535 | s->num_light_sensors, | |
536 | s->has_key_backlight); | |
5874583d HR |
537 | |
538 | return 0; | |
539 | } | |
540 | ||
541 | /* | |
542 | * applesmc_init_smcreg - Initialize register cache. | |
543 | * | |
544 | * Retries until initialization is successful, or the operation times out. | |
545 | * | |
546 | */ | |
547 | static int applesmc_init_smcreg(void) | |
548 | { | |
549 | int ms, ret; | |
550 | ||
551 | for (ms = 0; ms < INIT_TIMEOUT_MSECS; ms += INIT_WAIT_MSECS) { | |
552 | ret = applesmc_init_smcreg_try(); | |
553 | if (!ret) { | |
554 | if (ms) | |
555 | pr_info("init_smcreg() took %d ms\n", ms); | |
556 | return 0; | |
557 | } | |
558 | msleep(INIT_WAIT_MSECS); | |
559 | } | |
560 | ||
561 | kfree(smcreg.cache); | |
562 | smcreg.cache = NULL; | |
563 | ||
564 | return ret; | |
565 | } | |
566 | ||
567 | static void applesmc_destroy_smcreg(void) | |
568 | { | |
569 | kfree(smcreg.cache); | |
570 | smcreg.cache = NULL; | |
571 | smcreg.init_complete = false; | |
572 | } | |
573 | ||
6f2fad74 NB |
574 | /* Device model stuff */ |
575 | static int applesmc_probe(struct platform_device *dev) | |
576 | { | |
5874583d HR |
577 | int ret; |
578 | ||
579 | ret = applesmc_init_smcreg(); | |
580 | if (ret) | |
581 | return ret; | |
582 | ||
2344cd0c | 583 | applesmc_device_init(); |
6f2fad74 | 584 | |
6f2fad74 NB |
585 | return 0; |
586 | } | |
587 | ||
a976f150 HR |
588 | /* Synchronize device with memorized backlight state */ |
589 | static int applesmc_pm_resume(struct device *dev) | |
590 | { | |
40ef06f1 | 591 | if (smcreg.has_key_backlight) |
a976f150 | 592 | applesmc_write_key(BACKLIGHT_KEY, backlight_state, 2); |
a976f150 HR |
593 | return 0; |
594 | } | |
595 | ||
596 | /* Reinitialize device on resume from hibernation */ | |
597 | static int applesmc_pm_restore(struct device *dev) | |
6f2fad74 | 598 | { |
2344cd0c | 599 | applesmc_device_init(); |
a976f150 | 600 | return applesmc_pm_resume(dev); |
6f2fad74 NB |
601 | } |
602 | ||
47145210 | 603 | static const struct dev_pm_ops applesmc_pm_ops = { |
a976f150 HR |
604 | .resume = applesmc_pm_resume, |
605 | .restore = applesmc_pm_restore, | |
606 | }; | |
607 | ||
6f2fad74 NB |
608 | static struct platform_driver applesmc_driver = { |
609 | .probe = applesmc_probe, | |
6f2fad74 NB |
610 | .driver = { |
611 | .name = "applesmc", | |
612 | .owner = THIS_MODULE, | |
a976f150 | 613 | .pm = &applesmc_pm_ops, |
6f2fad74 NB |
614 | }, |
615 | }; | |
616 | ||
617 | /* | |
618 | * applesmc_calibrate - Set our "resting" values. Callers must | |
619 | * hold applesmc_lock. | |
620 | */ | |
621 | static void applesmc_calibrate(void) | |
622 | { | |
623 | applesmc_read_motion_sensor(SENSOR_X, &rest_x); | |
624 | applesmc_read_motion_sensor(SENSOR_Y, &rest_y); | |
625 | rest_x = -rest_x; | |
626 | } | |
627 | ||
d5cf2b99 | 628 | static void applesmc_idev_poll(struct input_polled_dev *dev) |
6f2fad74 | 629 | { |
d5cf2b99 | 630 | struct input_dev *idev = dev->input; |
6f2fad74 NB |
631 | s16 x, y; |
632 | ||
6f2fad74 | 633 | if (applesmc_read_motion_sensor(SENSOR_X, &x)) |
5874583d | 634 | return; |
6f2fad74 | 635 | if (applesmc_read_motion_sensor(SENSOR_Y, &y)) |
5874583d | 636 | return; |
6f2fad74 NB |
637 | |
638 | x = -x; | |
d5cf2b99 DT |
639 | input_report_abs(idev, ABS_X, x - rest_x); |
640 | input_report_abs(idev, ABS_Y, y - rest_y); | |
641 | input_sync(idev); | |
6f2fad74 NB |
642 | } |
643 | ||
644 | /* Sysfs Files */ | |
645 | ||
fa74419b NB |
646 | static ssize_t applesmc_name_show(struct device *dev, |
647 | struct device_attribute *attr, char *buf) | |
648 | { | |
649 | return snprintf(buf, PAGE_SIZE, "applesmc\n"); | |
650 | } | |
651 | ||
6f2fad74 NB |
652 | static ssize_t applesmc_position_show(struct device *dev, |
653 | struct device_attribute *attr, char *buf) | |
654 | { | |
655 | int ret; | |
656 | s16 x, y, z; | |
657 | ||
6f2fad74 NB |
658 | ret = applesmc_read_motion_sensor(SENSOR_X, &x); |
659 | if (ret) | |
660 | goto out; | |
661 | ret = applesmc_read_motion_sensor(SENSOR_Y, &y); | |
662 | if (ret) | |
663 | goto out; | |
664 | ret = applesmc_read_motion_sensor(SENSOR_Z, &z); | |
665 | if (ret) | |
666 | goto out; | |
667 | ||
668 | out: | |
6f2fad74 NB |
669 | if (ret) |
670 | return ret; | |
671 | else | |
672 | return snprintf(buf, PAGE_SIZE, "(%d,%d,%d)\n", x, y, z); | |
673 | } | |
674 | ||
675 | static ssize_t applesmc_light_show(struct device *dev, | |
676 | struct device_attribute *attr, char *sysfsbuf) | |
677 | { | |
5874583d | 678 | const struct applesmc_entry *entry; |
8bd1a12a | 679 | static int data_length; |
6f2fad74 NB |
680 | int ret; |
681 | u8 left = 0, right = 0; | |
5874583d | 682 | u8 buffer[10]; |
6f2fad74 | 683 | |
8bd1a12a | 684 | if (!data_length) { |
5874583d HR |
685 | entry = applesmc_get_entry_by_key(LIGHT_SENSOR_LEFT_KEY); |
686 | if (IS_ERR(entry)) | |
687 | return PTR_ERR(entry); | |
688 | if (entry->len > 10) | |
689 | return -ENXIO; | |
690 | data_length = entry->len; | |
1ee7c71b | 691 | pr_info("light sensor data length set to %d\n", data_length); |
8bd1a12a HR |
692 | } |
693 | ||
694 | ret = applesmc_read_key(LIGHT_SENSOR_LEFT_KEY, buffer, data_length); | |
c3d6362b AM |
695 | /* newer macbooks report a single 10-bit bigendian value */ |
696 | if (data_length == 10) { | |
697 | left = be16_to_cpu(*(__be16 *)(buffer + 6)) >> 2; | |
698 | goto out; | |
699 | } | |
6f2fad74 NB |
700 | left = buffer[2]; |
701 | if (ret) | |
702 | goto out; | |
8bd1a12a | 703 | ret = applesmc_read_key(LIGHT_SENSOR_RIGHT_KEY, buffer, data_length); |
6f2fad74 NB |
704 | right = buffer[2]; |
705 | ||
706 | out: | |
6f2fad74 NB |
707 | if (ret) |
708 | return ret; | |
709 | else | |
710 | return snprintf(sysfsbuf, PAGE_SIZE, "(%d,%d)\n", left, right); | |
711 | } | |
712 | ||
fa5575cf AM |
713 | /* Displays sensor key as label */ |
714 | static ssize_t applesmc_show_sensor_label(struct device *dev, | |
715 | struct device_attribute *devattr, char *sysfsbuf) | |
716 | { | |
9792dadf HR |
717 | int index = smcreg.temp_begin + to_index(devattr); |
718 | const struct applesmc_entry *entry; | |
fa5575cf | 719 | |
9792dadf HR |
720 | entry = applesmc_get_entry_by_index(index); |
721 | if (IS_ERR(entry)) | |
722 | return PTR_ERR(entry); | |
723 | ||
724 | return snprintf(sysfsbuf, PAGE_SIZE, "%s\n", entry->key); | |
fa5575cf AM |
725 | } |
726 | ||
6f2fad74 NB |
727 | /* Displays degree Celsius * 1000 */ |
728 | static ssize_t applesmc_show_temperature(struct device *dev, | |
729 | struct device_attribute *devattr, char *sysfsbuf) | |
730 | { | |
9792dadf HR |
731 | int index = smcreg.temp_begin + to_index(devattr); |
732 | const struct applesmc_entry *entry; | |
6f2fad74 NB |
733 | int ret; |
734 | u8 buffer[2]; | |
735 | unsigned int temp; | |
6f2fad74 | 736 | |
9792dadf HR |
737 | entry = applesmc_get_entry_by_index(index); |
738 | if (IS_ERR(entry)) | |
739 | return PTR_ERR(entry); | |
dcdea261 HR |
740 | if (entry->len > 2) |
741 | return -EINVAL; | |
6f2fad74 | 742 | |
dcdea261 | 743 | ret = applesmc_read_entry(entry, buffer, entry->len); |
6f2fad74 NB |
744 | if (ret) |
745 | return ret; | |
9792dadf | 746 | |
dcdea261 HR |
747 | if (entry->len == 2) { |
748 | temp = buffer[0] * 1000; | |
749 | temp += (buffer[1] >> 6) * 250; | |
750 | } else { | |
751 | temp = buffer[0] * 4000; | |
752 | } | |
9792dadf HR |
753 | |
754 | return snprintf(sysfsbuf, PAGE_SIZE, "%u\n", temp); | |
6f2fad74 NB |
755 | } |
756 | ||
757 | static ssize_t applesmc_show_fan_speed(struct device *dev, | |
758 | struct device_attribute *attr, char *sysfsbuf) | |
759 | { | |
760 | int ret; | |
761 | unsigned int speed = 0; | |
762 | char newkey[5]; | |
763 | u8 buffer[2]; | |
6f2fad74 | 764 | |
3eba2bf7 | 765 | sprintf(newkey, fan_speed_fmt[to_option(attr)], to_index(attr)); |
6f2fad74 | 766 | |
6f2fad74 NB |
767 | ret = applesmc_read_key(newkey, buffer, 2); |
768 | speed = ((buffer[0] << 8 | buffer[1]) >> 2); | |
769 | ||
6f2fad74 NB |
770 | if (ret) |
771 | return ret; | |
772 | else | |
773 | return snprintf(sysfsbuf, PAGE_SIZE, "%u\n", speed); | |
774 | } | |
775 | ||
776 | static ssize_t applesmc_store_fan_speed(struct device *dev, | |
777 | struct device_attribute *attr, | |
778 | const char *sysfsbuf, size_t count) | |
779 | { | |
780 | int ret; | |
2bfe8148 | 781 | unsigned long speed; |
6f2fad74 NB |
782 | char newkey[5]; |
783 | u8 buffer[2]; | |
6f2fad74 | 784 | |
2bfe8148 GR |
785 | if (strict_strtoul(sysfsbuf, 10, &speed) < 0 || speed >= 0x4000) |
786 | return -EINVAL; /* Bigger than a 14-bit value */ | |
6f2fad74 | 787 | |
3eba2bf7 | 788 | sprintf(newkey, fan_speed_fmt[to_option(attr)], to_index(attr)); |
6f2fad74 | 789 | |
6f2fad74 NB |
790 | buffer[0] = (speed >> 6) & 0xff; |
791 | buffer[1] = (speed << 2) & 0xff; | |
792 | ret = applesmc_write_key(newkey, buffer, 2); | |
793 | ||
6f2fad74 NB |
794 | if (ret) |
795 | return ret; | |
796 | else | |
797 | return count; | |
798 | } | |
799 | ||
800 | static ssize_t applesmc_show_fan_manual(struct device *dev, | |
3eba2bf7 | 801 | struct device_attribute *attr, char *sysfsbuf) |
6f2fad74 NB |
802 | { |
803 | int ret; | |
804 | u16 manual = 0; | |
805 | u8 buffer[2]; | |
6f2fad74 | 806 | |
6f2fad74 | 807 | ret = applesmc_read_key(FANS_MANUAL, buffer, 2); |
3eba2bf7 | 808 | manual = ((buffer[0] << 8 | buffer[1]) >> to_index(attr)) & 0x01; |
6f2fad74 | 809 | |
6f2fad74 NB |
810 | if (ret) |
811 | return ret; | |
812 | else | |
813 | return snprintf(sysfsbuf, PAGE_SIZE, "%d\n", manual); | |
814 | } | |
815 | ||
816 | static ssize_t applesmc_store_fan_manual(struct device *dev, | |
3eba2bf7 | 817 | struct device_attribute *attr, |
6f2fad74 NB |
818 | const char *sysfsbuf, size_t count) |
819 | { | |
820 | int ret; | |
821 | u8 buffer[2]; | |
2bfe8148 | 822 | unsigned long input; |
6f2fad74 | 823 | u16 val; |
6f2fad74 | 824 | |
2bfe8148 GR |
825 | if (strict_strtoul(sysfsbuf, 10, &input) < 0) |
826 | return -EINVAL; | |
6f2fad74 | 827 | |
6f2fad74 NB |
828 | ret = applesmc_read_key(FANS_MANUAL, buffer, 2); |
829 | val = (buffer[0] << 8 | buffer[1]); | |
830 | if (ret) | |
831 | goto out; | |
832 | ||
833 | if (input) | |
3eba2bf7 | 834 | val = val | (0x01 << to_index(attr)); |
6f2fad74 | 835 | else |
3eba2bf7 | 836 | val = val & ~(0x01 << to_index(attr)); |
6f2fad74 NB |
837 | |
838 | buffer[0] = (val >> 8) & 0xFF; | |
839 | buffer[1] = val & 0xFF; | |
840 | ||
841 | ret = applesmc_write_key(FANS_MANUAL, buffer, 2); | |
842 | ||
843 | out: | |
6f2fad74 NB |
844 | if (ret) |
845 | return ret; | |
846 | else | |
847 | return count; | |
848 | } | |
849 | ||
850 | static ssize_t applesmc_show_fan_position(struct device *dev, | |
851 | struct device_attribute *attr, char *sysfsbuf) | |
852 | { | |
853 | int ret; | |
854 | char newkey[5]; | |
855 | u8 buffer[17]; | |
6f2fad74 | 856 | |
3eba2bf7 | 857 | sprintf(newkey, FAN_ID_FMT, to_index(attr)); |
6f2fad74 | 858 | |
6f2fad74 NB |
859 | ret = applesmc_read_key(newkey, buffer, 16); |
860 | buffer[16] = 0; | |
861 | ||
6f2fad74 NB |
862 | if (ret) |
863 | return ret; | |
864 | else | |
865 | return snprintf(sysfsbuf, PAGE_SIZE, "%s\n", buffer+4); | |
866 | } | |
867 | ||
868 | static ssize_t applesmc_calibrate_show(struct device *dev, | |
869 | struct device_attribute *attr, char *sysfsbuf) | |
870 | { | |
871 | return snprintf(sysfsbuf, PAGE_SIZE, "(%d,%d)\n", rest_x, rest_y); | |
872 | } | |
873 | ||
874 | static ssize_t applesmc_calibrate_store(struct device *dev, | |
875 | struct device_attribute *attr, const char *sysfsbuf, size_t count) | |
876 | { | |
6f2fad74 | 877 | applesmc_calibrate(); |
6f2fad74 NB |
878 | |
879 | return count; | |
880 | } | |
881 | ||
6f2fad74 NB |
882 | static void applesmc_backlight_set(struct work_struct *work) |
883 | { | |
a976f150 | 884 | applesmc_write_key(BACKLIGHT_KEY, backlight_state, 2); |
6f2fad74 NB |
885 | } |
886 | static DECLARE_WORK(backlight_work, &applesmc_backlight_set); | |
887 | ||
888 | static void applesmc_brightness_set(struct led_classdev *led_cdev, | |
889 | enum led_brightness value) | |
890 | { | |
891 | int ret; | |
892 | ||
a976f150 | 893 | backlight_state[0] = value; |
6f2fad74 NB |
894 | ret = queue_work(applesmc_led_wq, &backlight_work); |
895 | ||
896 | if (debug && (!ret)) | |
897 | printk(KERN_DEBUG "applesmc: work was already on the queue.\n"); | |
898 | } | |
899 | ||
900 | static ssize_t applesmc_key_count_show(struct device *dev, | |
901 | struct device_attribute *attr, char *sysfsbuf) | |
902 | { | |
903 | int ret; | |
904 | u8 buffer[4]; | |
905 | u32 count; | |
906 | ||
6f2fad74 NB |
907 | ret = applesmc_read_key(KEY_COUNT_KEY, buffer, 4); |
908 | count = ((u32)buffer[0]<<24) + ((u32)buffer[1]<<16) + | |
909 | ((u32)buffer[2]<<8) + buffer[3]; | |
910 | ||
6f2fad74 NB |
911 | if (ret) |
912 | return ret; | |
913 | else | |
914 | return snprintf(sysfsbuf, PAGE_SIZE, "%d\n", count); | |
915 | } | |
916 | ||
917 | static ssize_t applesmc_key_at_index_read_show(struct device *dev, | |
918 | struct device_attribute *attr, char *sysfsbuf) | |
919 | { | |
5874583d | 920 | const struct applesmc_entry *entry; |
6f2fad74 NB |
921 | int ret; |
922 | ||
5874583d HR |
923 | entry = applesmc_get_entry_by_index(key_at_index); |
924 | if (IS_ERR(entry)) | |
925 | return PTR_ERR(entry); | |
926 | ret = applesmc_read_entry(entry, sysfsbuf, entry->len); | |
927 | if (ret) | |
6f2fad74 | 928 | return ret; |
6f2fad74 | 929 | |
5874583d | 930 | return entry->len; |
6f2fad74 NB |
931 | } |
932 | ||
933 | static ssize_t applesmc_key_at_index_data_length_show(struct device *dev, | |
934 | struct device_attribute *attr, char *sysfsbuf) | |
935 | { | |
5874583d | 936 | const struct applesmc_entry *entry; |
6f2fad74 | 937 | |
5874583d HR |
938 | entry = applesmc_get_entry_by_index(key_at_index); |
939 | if (IS_ERR(entry)) | |
940 | return PTR_ERR(entry); | |
6f2fad74 | 941 | |
5874583d | 942 | return snprintf(sysfsbuf, PAGE_SIZE, "%d\n", entry->len); |
6f2fad74 NB |
943 | } |
944 | ||
945 | static ssize_t applesmc_key_at_index_type_show(struct device *dev, | |
946 | struct device_attribute *attr, char *sysfsbuf) | |
947 | { | |
5874583d | 948 | const struct applesmc_entry *entry; |
6f2fad74 | 949 | |
5874583d HR |
950 | entry = applesmc_get_entry_by_index(key_at_index); |
951 | if (IS_ERR(entry)) | |
952 | return PTR_ERR(entry); | |
6f2fad74 | 953 | |
5874583d | 954 | return snprintf(sysfsbuf, PAGE_SIZE, "%s\n", entry->type); |
6f2fad74 NB |
955 | } |
956 | ||
957 | static ssize_t applesmc_key_at_index_name_show(struct device *dev, | |
958 | struct device_attribute *attr, char *sysfsbuf) | |
959 | { | |
5874583d | 960 | const struct applesmc_entry *entry; |
6f2fad74 | 961 | |
5874583d HR |
962 | entry = applesmc_get_entry_by_index(key_at_index); |
963 | if (IS_ERR(entry)) | |
964 | return PTR_ERR(entry); | |
6f2fad74 | 965 | |
5874583d | 966 | return snprintf(sysfsbuf, PAGE_SIZE, "%s\n", entry->key); |
6f2fad74 NB |
967 | } |
968 | ||
969 | static ssize_t applesmc_key_at_index_show(struct device *dev, | |
970 | struct device_attribute *attr, char *sysfsbuf) | |
971 | { | |
972 | return snprintf(sysfsbuf, PAGE_SIZE, "%d\n", key_at_index); | |
973 | } | |
974 | ||
975 | static ssize_t applesmc_key_at_index_store(struct device *dev, | |
976 | struct device_attribute *attr, const char *sysfsbuf, size_t count) | |
977 | { | |
5874583d | 978 | unsigned long newkey; |
6f2fad74 | 979 | |
5874583d HR |
980 | if (strict_strtoul(sysfsbuf, 10, &newkey) < 0 |
981 | || newkey >= smcreg.key_count) | |
982 | return -EINVAL; | |
6f2fad74 | 983 | |
5874583d | 984 | key_at_index = newkey; |
6f2fad74 NB |
985 | return count; |
986 | } | |
987 | ||
988 | static struct led_classdev applesmc_backlight = { | |
6c152bee | 989 | .name = "smc::kbd_backlight", |
6f2fad74 NB |
990 | .default_trigger = "nand-disk", |
991 | .brightness_set = applesmc_brightness_set, | |
992 | }; | |
993 | ||
0b0b5dff HR |
994 | static struct applesmc_node_group info_group[] = { |
995 | { "name", applesmc_name_show }, | |
996 | { "key_count", applesmc_key_count_show }, | |
997 | { "key_at_index", applesmc_key_at_index_show, applesmc_key_at_index_store }, | |
998 | { "key_at_index_name", applesmc_key_at_index_name_show }, | |
999 | { "key_at_index_type", applesmc_key_at_index_type_show }, | |
1000 | { "key_at_index_data_length", applesmc_key_at_index_data_length_show }, | |
1001 | { "key_at_index_data", applesmc_key_at_index_read_show }, | |
1002 | { } | |
6f2fad74 NB |
1003 | }; |
1004 | ||
0b0b5dff HR |
1005 | static struct applesmc_node_group accelerometer_group[] = { |
1006 | { "position", applesmc_position_show }, | |
1007 | { "calibrate", applesmc_calibrate_show, applesmc_calibrate_store }, | |
1008 | { } | |
6f2fad74 NB |
1009 | }; |
1010 | ||
0b0b5dff HR |
1011 | static struct applesmc_node_group light_sensor_group[] = { |
1012 | { "light", applesmc_light_show }, | |
1013 | { } | |
1014 | }; | |
6f2fad74 | 1015 | |
3eba2bf7 HR |
1016 | static struct applesmc_node_group fan_group[] = { |
1017 | { "fan%d_label", applesmc_show_fan_position }, | |
1018 | { "fan%d_input", applesmc_show_fan_speed, NULL, 0 }, | |
1019 | { "fan%d_min", applesmc_show_fan_speed, applesmc_store_fan_speed, 1 }, | |
1020 | { "fan%d_max", applesmc_show_fan_speed, NULL, 2 }, | |
1021 | { "fan%d_safe", applesmc_show_fan_speed, NULL, 3 }, | |
1022 | { "fan%d_output", applesmc_show_fan_speed, applesmc_store_fan_speed, 4 }, | |
1023 | { "fan%d_manual", applesmc_show_fan_manual, applesmc_store_fan_manual }, | |
1024 | { } | |
6f2fad74 NB |
1025 | }; |
1026 | ||
9792dadf HR |
1027 | static struct applesmc_node_group temp_group[] = { |
1028 | { "temp%d_label", applesmc_show_sensor_label }, | |
1029 | { "temp%d_input", applesmc_show_temperature }, | |
1030 | { } | |
fa5575cf AM |
1031 | }; |
1032 | ||
6f2fad74 NB |
1033 | /* Module stuff */ |
1034 | ||
9792dadf HR |
1035 | /* |
1036 | * applesmc_destroy_nodes - remove files and free associated memory | |
1037 | */ | |
1038 | static void applesmc_destroy_nodes(struct applesmc_node_group *groups) | |
1039 | { | |
1040 | struct applesmc_node_group *grp; | |
1041 | struct applesmc_dev_attr *node; | |
1042 | ||
1043 | for (grp = groups; grp->nodes; grp++) { | |
1044 | for (node = grp->nodes; node->sda.dev_attr.attr.name; node++) | |
1045 | sysfs_remove_file(&pdev->dev.kobj, | |
1046 | &node->sda.dev_attr.attr); | |
1047 | kfree(grp->nodes); | |
1048 | grp->nodes = NULL; | |
1049 | } | |
1050 | } | |
1051 | ||
1052 | /* | |
1053 | * applesmc_create_nodes - create a two-dimensional group of sysfs files | |
1054 | */ | |
1055 | static int applesmc_create_nodes(struct applesmc_node_group *groups, int num) | |
1056 | { | |
1057 | struct applesmc_node_group *grp; | |
1058 | struct applesmc_dev_attr *node; | |
1059 | struct attribute *attr; | |
1060 | int ret, i; | |
1061 | ||
1062 | for (grp = groups; grp->format; grp++) { | |
1063 | grp->nodes = kcalloc(num + 1, sizeof(*node), GFP_KERNEL); | |
1064 | if (!grp->nodes) { | |
1065 | ret = -ENOMEM; | |
1066 | goto out; | |
1067 | } | |
1068 | for (i = 0; i < num; i++) { | |
1069 | node = &grp->nodes[i]; | |
1070 | sprintf(node->name, grp->format, i + 1); | |
3eba2bf7 | 1071 | node->sda.index = (grp->option << 16) | (i & 0xffff); |
9792dadf HR |
1072 | node->sda.dev_attr.show = grp->show; |
1073 | node->sda.dev_attr.store = grp->store; | |
1074 | attr = &node->sda.dev_attr.attr; | |
9d1f8a40 | 1075 | sysfs_attr_init(attr); |
9792dadf HR |
1076 | attr->name = node->name; |
1077 | attr->mode = S_IRUGO | (grp->store ? S_IWUSR : 0); | |
1078 | ret = sysfs_create_file(&pdev->dev.kobj, attr); | |
1079 | if (ret) { | |
1080 | attr->name = NULL; | |
1081 | goto out; | |
1082 | } | |
1083 | } | |
1084 | } | |
1085 | ||
1086 | return 0; | |
1087 | out: | |
1088 | applesmc_destroy_nodes(groups); | |
1089 | return ret; | |
1090 | } | |
1091 | ||
6f2fad74 NB |
1092 | /* Create accelerometer ressources */ |
1093 | static int applesmc_create_accelerometer(void) | |
1094 | { | |
d5cf2b99 | 1095 | struct input_dev *idev; |
6f2fad74 NB |
1096 | int ret; |
1097 | ||
0b0b5dff HR |
1098 | if (!smcreg.has_accelerometer) |
1099 | return 0; | |
1100 | ||
1101 | ret = applesmc_create_nodes(accelerometer_group, 1); | |
6f2fad74 NB |
1102 | if (ret) |
1103 | goto out; | |
1104 | ||
d5cf2b99 | 1105 | applesmc_idev = input_allocate_polled_device(); |
6f2fad74 NB |
1106 | if (!applesmc_idev) { |
1107 | ret = -ENOMEM; | |
1108 | goto out_sysfs; | |
1109 | } | |
1110 | ||
d5cf2b99 DT |
1111 | applesmc_idev->poll = applesmc_idev_poll; |
1112 | applesmc_idev->poll_interval = APPLESMC_POLL_INTERVAL; | |
1113 | ||
6f2fad74 NB |
1114 | /* initial calibrate for the input device */ |
1115 | applesmc_calibrate(); | |
1116 | ||
d5cf2b99 DT |
1117 | /* initialize the input device */ |
1118 | idev = applesmc_idev->input; | |
1119 | idev->name = "applesmc"; | |
1120 | idev->id.bustype = BUS_HOST; | |
1121 | idev->dev.parent = &pdev->dev; | |
7b19ada2 | 1122 | idev->evbit[0] = BIT_MASK(EV_ABS); |
d5cf2b99 | 1123 | input_set_abs_params(idev, ABS_X, |
6f2fad74 | 1124 | -256, 256, APPLESMC_INPUT_FUZZ, APPLESMC_INPUT_FLAT); |
d5cf2b99 | 1125 | input_set_abs_params(idev, ABS_Y, |
6f2fad74 NB |
1126 | -256, 256, APPLESMC_INPUT_FUZZ, APPLESMC_INPUT_FLAT); |
1127 | ||
d5cf2b99 | 1128 | ret = input_register_polled_device(applesmc_idev); |
6f2fad74 NB |
1129 | if (ret) |
1130 | goto out_idev; | |
1131 | ||
6f2fad74 NB |
1132 | return 0; |
1133 | ||
1134 | out_idev: | |
d5cf2b99 | 1135 | input_free_polled_device(applesmc_idev); |
6f2fad74 NB |
1136 | |
1137 | out_sysfs: | |
0b0b5dff | 1138 | applesmc_destroy_nodes(accelerometer_group); |
6f2fad74 NB |
1139 | |
1140 | out: | |
1ee7c71b | 1141 | pr_warn("driver init failed (ret=%d)!\n", ret); |
6f2fad74 NB |
1142 | return ret; |
1143 | } | |
1144 | ||
1145 | /* Release all ressources used by the accelerometer */ | |
1146 | static void applesmc_release_accelerometer(void) | |
1147 | { | |
0b0b5dff HR |
1148 | if (!smcreg.has_accelerometer) |
1149 | return; | |
d5cf2b99 DT |
1150 | input_unregister_polled_device(applesmc_idev); |
1151 | input_free_polled_device(applesmc_idev); | |
0b0b5dff | 1152 | applesmc_destroy_nodes(accelerometer_group); |
6f2fad74 | 1153 | } |
0b0b5dff HR |
1154 | |
1155 | static int applesmc_create_light_sensor(void) | |
1156 | { | |
1157 | if (!smcreg.num_light_sensors) | |
1158 | return 0; | |
1159 | return applesmc_create_nodes(light_sensor_group, 1); | |
1160 | } | |
1161 | ||
1162 | static void applesmc_release_light_sensor(void) | |
1163 | { | |
1164 | if (!smcreg.num_light_sensors) | |
1165 | return; | |
1166 | applesmc_destroy_nodes(light_sensor_group); | |
1167 | } | |
1168 | ||
1169 | static int applesmc_create_key_backlight(void) | |
1170 | { | |
1171 | if (!smcreg.has_key_backlight) | |
1172 | return 0; | |
1173 | applesmc_led_wq = create_singlethread_workqueue("applesmc-led"); | |
1174 | if (!applesmc_led_wq) | |
1175 | return -ENOMEM; | |
1176 | return led_classdev_register(&pdev->dev, &applesmc_backlight); | |
1177 | } | |
1178 | ||
1179 | static void applesmc_release_key_backlight(void) | |
1180 | { | |
1181 | if (!smcreg.has_key_backlight) | |
1182 | return; | |
1183 | led_classdev_unregister(&applesmc_backlight); | |
1184 | destroy_workqueue(applesmc_led_wq); | |
1185 | } | |
1186 | ||
40ef06f1 HR |
1187 | static int applesmc_dmi_match(const struct dmi_system_id *id) |
1188 | { | |
1189 | return 1; | |
1190 | } | |
6f2fad74 NB |
1191 | |
1192 | /* Note that DMI_MATCH(...,"MacBook") will match "MacBookPro1,1". | |
1193 | * So we need to put "Apple MacBook Pro" before "Apple MacBook". */ | |
1194 | static __initdata struct dmi_system_id applesmc_whitelist[] = { | |
f5274c97 HR |
1195 | { applesmc_dmi_match, "Apple MacBook Air", { |
1196 | DMI_MATCH(DMI_BOARD_VENDOR, "Apple"), | |
1197 | DMI_MATCH(DMI_PRODUCT_NAME, "MacBookAir") }, | |
40ef06f1 | 1198 | }, |
6f2fad74 | 1199 | { applesmc_dmi_match, "Apple MacBook Pro", { |
2bfe8148 GR |
1200 | DMI_MATCH(DMI_BOARD_VENDOR, "Apple"), |
1201 | DMI_MATCH(DMI_PRODUCT_NAME, "MacBookPro") }, | |
40ef06f1 | 1202 | }, |
cd19ba13 | 1203 | { applesmc_dmi_match, "Apple MacBook", { |
2bfe8148 GR |
1204 | DMI_MATCH(DMI_BOARD_VENDOR, "Apple"), |
1205 | DMI_MATCH(DMI_PRODUCT_NAME, "MacBook") }, | |
40ef06f1 | 1206 | }, |
6f2fad74 | 1207 | { applesmc_dmi_match, "Apple Macmini", { |
2bfe8148 GR |
1208 | DMI_MATCH(DMI_BOARD_VENDOR, "Apple"), |
1209 | DMI_MATCH(DMI_PRODUCT_NAME, "Macmini") }, | |
40ef06f1 | 1210 | }, |
45a3a36b HR |
1211 | { applesmc_dmi_match, "Apple MacPro", { |
1212 | DMI_MATCH(DMI_BOARD_VENDOR, "Apple"), | |
1213 | DMI_MATCH(DMI_PRODUCT_NAME, "MacPro") }, | |
40ef06f1 | 1214 | }, |
9f86f28d | 1215 | { applesmc_dmi_match, "Apple iMac", { |
2bfe8148 GR |
1216 | DMI_MATCH(DMI_BOARD_VENDOR, "Apple"), |
1217 | DMI_MATCH(DMI_PRODUCT_NAME, "iMac") }, | |
40ef06f1 | 1218 | }, |
6f2fad74 NB |
1219 | { .ident = NULL } |
1220 | }; | |
1221 | ||
1222 | static int __init applesmc_init(void) | |
1223 | { | |
1224 | int ret; | |
6f2fad74 | 1225 | |
6f2fad74 | 1226 | if (!dmi_check_system(applesmc_whitelist)) { |
1ee7c71b | 1227 | pr_warn("supported laptop not found!\n"); |
6f2fad74 NB |
1228 | ret = -ENODEV; |
1229 | goto out; | |
1230 | } | |
1231 | ||
1232 | if (!request_region(APPLESMC_DATA_PORT, APPLESMC_NR_PORTS, | |
1233 | "applesmc")) { | |
1234 | ret = -ENXIO; | |
1235 | goto out; | |
1236 | } | |
1237 | ||
1238 | ret = platform_driver_register(&applesmc_driver); | |
1239 | if (ret) | |
1240 | goto out_region; | |
1241 | ||
ddfbf2af JD |
1242 | pdev = platform_device_register_simple("applesmc", APPLESMC_DATA_PORT, |
1243 | NULL, 0); | |
6f2fad74 NB |
1244 | if (IS_ERR(pdev)) { |
1245 | ret = PTR_ERR(pdev); | |
1246 | goto out_driver; | |
1247 | } | |
1248 | ||
5874583d HR |
1249 | /* create register cache */ |
1250 | ret = applesmc_init_smcreg(); | |
6996abf0 NB |
1251 | if (ret) |
1252 | goto out_device; | |
fa74419b | 1253 | |
0b0b5dff | 1254 | ret = applesmc_create_nodes(info_group, 1); |
5874583d HR |
1255 | if (ret) |
1256 | goto out_smcreg; | |
1257 | ||
3eba2bf7 HR |
1258 | ret = applesmc_create_nodes(fan_group, smcreg.fan_count); |
1259 | if (ret) | |
1260 | goto out_info; | |
6f2fad74 | 1261 | |
9792dadf HR |
1262 | ret = applesmc_create_nodes(temp_group, smcreg.temp_count); |
1263 | if (ret) | |
1264 | goto out_fans; | |
6f2fad74 | 1265 | |
0b0b5dff HR |
1266 | ret = applesmc_create_accelerometer(); |
1267 | if (ret) | |
1268 | goto out_temperature; | |
6f2fad74 | 1269 | |
0b0b5dff HR |
1270 | ret = applesmc_create_light_sensor(); |
1271 | if (ret) | |
1272 | goto out_accelerometer; | |
6f2fad74 | 1273 | |
0b0b5dff HR |
1274 | ret = applesmc_create_key_backlight(); |
1275 | if (ret) | |
1276 | goto out_light_sysfs; | |
6f2fad74 | 1277 | |
1beeffe4 TJ |
1278 | hwmon_dev = hwmon_device_register(&pdev->dev); |
1279 | if (IS_ERR(hwmon_dev)) { | |
1280 | ret = PTR_ERR(hwmon_dev); | |
6f2fad74 NB |
1281 | goto out_light_ledclass; |
1282 | } | |
1283 | ||
6f2fad74 NB |
1284 | return 0; |
1285 | ||
1286 | out_light_ledclass: | |
0b0b5dff | 1287 | applesmc_release_key_backlight(); |
6f2fad74 | 1288 | out_light_sysfs: |
0b0b5dff | 1289 | applesmc_release_light_sensor(); |
6f2fad74 | 1290 | out_accelerometer: |
0b0b5dff | 1291 | applesmc_release_accelerometer(); |
6f2fad74 | 1292 | out_temperature: |
9792dadf | 1293 | applesmc_destroy_nodes(temp_group); |
0559a538 | 1294 | out_fans: |
3eba2bf7 HR |
1295 | applesmc_destroy_nodes(fan_group); |
1296 | out_info: | |
0b0b5dff | 1297 | applesmc_destroy_nodes(info_group); |
5874583d HR |
1298 | out_smcreg: |
1299 | applesmc_destroy_smcreg(); | |
6f2fad74 NB |
1300 | out_device: |
1301 | platform_device_unregister(pdev); | |
1302 | out_driver: | |
1303 | platform_driver_unregister(&applesmc_driver); | |
1304 | out_region: | |
1305 | release_region(APPLESMC_DATA_PORT, APPLESMC_NR_PORTS); | |
1306 | out: | |
1ee7c71b | 1307 | pr_warn("driver init failed (ret=%d)!\n", ret); |
6f2fad74 NB |
1308 | return ret; |
1309 | } | |
1310 | ||
1311 | static void __exit applesmc_exit(void) | |
1312 | { | |
1beeffe4 | 1313 | hwmon_device_unregister(hwmon_dev); |
0b0b5dff HR |
1314 | applesmc_release_key_backlight(); |
1315 | applesmc_release_light_sensor(); | |
1316 | applesmc_release_accelerometer(); | |
9792dadf | 1317 | applesmc_destroy_nodes(temp_group); |
3eba2bf7 | 1318 | applesmc_destroy_nodes(fan_group); |
0b0b5dff | 1319 | applesmc_destroy_nodes(info_group); |
5874583d | 1320 | applesmc_destroy_smcreg(); |
6f2fad74 NB |
1321 | platform_device_unregister(pdev); |
1322 | platform_driver_unregister(&applesmc_driver); | |
1323 | release_region(APPLESMC_DATA_PORT, APPLESMC_NR_PORTS); | |
6f2fad74 NB |
1324 | } |
1325 | ||
1326 | module_init(applesmc_init); | |
1327 | module_exit(applesmc_exit); | |
1328 | ||
1329 | MODULE_AUTHOR("Nicolas Boichat"); | |
1330 | MODULE_DESCRIPTION("Apple SMC"); | |
1331 | MODULE_LICENSE("GPL v2"); | |
dc924efb | 1332 | MODULE_DEVICE_TABLE(dmi, applesmc_whitelist); |