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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> | |
58d5aa5c | 22 | #include <linux/input.h> |
6f2fad74 | 23 | #include <linux/kernel.h> |
5874583d | 24 | #include <linux/slab.h> |
6f2fad74 NB |
25 | #include <linux/module.h> |
26 | #include <linux/timer.h> | |
27 | #include <linux/dmi.h> | |
28 | #include <linux/mutex.h> | |
29 | #include <linux/hwmon-sysfs.h> | |
6055fae8 | 30 | #include <linux/io.h> |
6f2fad74 NB |
31 | #include <linux/leds.h> |
32 | #include <linux/hwmon.h> | |
33 | #include <linux/workqueue.h> | |
fa845740 | 34 | #include <linux/err.h> |
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; |
58d5aa5c | 143 | static struct input_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 | { |
fff2d0f7 | 159 | unsigned long end = jiffies + (APPLESMC_MAX_WAIT * HZ) / USEC_PER_SEC; |
829917cd | 160 | u8 status; |
8c9398d1 | 161 | int us; |
fff2d0f7 | 162 | |
8c9398d1 | 163 | for (us = APPLESMC_MIN_WAIT; us < APPLESMC_MAX_WAIT; us <<= 1) { |
fff2d0f7 | 164 | usleep_range(us, us * 16); |
829917cd HR |
165 | status = inb(APPLESMC_CMD_PORT); |
166 | /* read: wait for smc to settle */ | |
167 | if (status & 0x01) | |
6f2fad74 | 168 | return 0; |
fff2d0f7 AB |
169 | /* timeout: give up */ |
170 | if (time_after(jiffies, end)) | |
171 | break; | |
6f2fad74 NB |
172 | } |
173 | ||
829917cd | 174 | pr_warn("wait_read() fail: 0x%02x\n", status); |
6f2fad74 NB |
175 | return -EIO; |
176 | } | |
177 | ||
84d2d7f2 | 178 | /* |
829917cd HR |
179 | * send_byte - Write to SMC port, retrying when necessary. Callers |
180 | * must hold applesmc_lock. | |
84d2d7f2 | 181 | */ |
829917cd | 182 | static int send_byte(u8 cmd, u16 port) |
84d2d7f2 | 183 | { |
829917cd | 184 | u8 status; |
8c9398d1 | 185 | int us; |
fff2d0f7 | 186 | unsigned long end = jiffies + (APPLESMC_MAX_WAIT * HZ) / USEC_PER_SEC; |
829917cd HR |
187 | |
188 | outb(cmd, port); | |
8c9398d1 | 189 | for (us = APPLESMC_MIN_WAIT; us < APPLESMC_MAX_WAIT; us <<= 1) { |
fff2d0f7 | 190 | usleep_range(us, us * 16); |
829917cd HR |
191 | status = inb(APPLESMC_CMD_PORT); |
192 | /* write: wait for smc to settle */ | |
193 | if (status & 0x02) | |
194 | continue; | |
195 | /* ready: cmd accepted, return */ | |
196 | if (status & 0x04) | |
84d2d7f2 | 197 | return 0; |
829917cd | 198 | /* timeout: give up */ |
fff2d0f7 | 199 | if (time_after(jiffies, end)) |
829917cd HR |
200 | break; |
201 | /* busy: long wait and resend */ | |
202 | udelay(APPLESMC_RETRY_WAIT); | |
203 | outb(cmd, port); | |
84d2d7f2 | 204 | } |
829917cd HR |
205 | |
206 | pr_warn("send_byte(0x%02x, 0x%04x) fail: 0x%02x\n", cmd, port, status); | |
84d2d7f2 HR |
207 | return -EIO; |
208 | } | |
209 | ||
829917cd HR |
210 | static int send_command(u8 cmd) |
211 | { | |
212 | return send_byte(cmd, APPLESMC_CMD_PORT); | |
213 | } | |
214 | ||
5874583d | 215 | static int send_argument(const char *key) |
6f2fad74 NB |
216 | { |
217 | int i; | |
218 | ||
829917cd HR |
219 | for (i = 0; i < 4; i++) |
220 | if (send_byte(key[i], APPLESMC_DATA_PORT)) | |
6f2fad74 | 221 | return -EIO; |
5874583d HR |
222 | return 0; |
223 | } | |
224 | ||
225 | static int read_smc(u8 cmd, const char *key, u8 *buffer, u8 len) | |
226 | { | |
25f2bd7f | 227 | u8 status, data = 0; |
5874583d HR |
228 | int i; |
229 | ||
230 | if (send_command(cmd) || send_argument(key)) { | |
ac852edb | 231 | pr_warn("%.4s: read arg fail\n", key); |
5874583d HR |
232 | return -EIO; |
233 | } | |
6f2fad74 | 234 | |
25f2bd7f | 235 | /* This has no effect on newer (2012) SMCs */ |
829917cd HR |
236 | if (send_byte(len, APPLESMC_DATA_PORT)) { |
237 | pr_warn("%.4s: read len fail\n", key); | |
238 | return -EIO; | |
239 | } | |
6f2fad74 NB |
240 | |
241 | for (i = 0; i < len; i++) { | |
829917cd HR |
242 | if (wait_read()) { |
243 | pr_warn("%.4s: read data[%d] fail\n", key, i); | |
6f2fad74 | 244 | return -EIO; |
5874583d | 245 | } |
6f2fad74 | 246 | buffer[i] = inb(APPLESMC_DATA_PORT); |
6f2fad74 | 247 | } |
6f2fad74 | 248 | |
25f2bd7f HR |
249 | /* Read the data port until bit0 is cleared */ |
250 | for (i = 0; i < 16; i++) { | |
251 | udelay(APPLESMC_MIN_WAIT); | |
252 | status = inb(APPLESMC_CMD_PORT); | |
253 | if (!(status & 0x01)) | |
254 | break; | |
255 | data = inb(APPLESMC_DATA_PORT); | |
256 | } | |
257 | if (i) | |
258 | pr_warn("flushed %d bytes, last value is: %d\n", i, data); | |
259 | ||
6f2fad74 NB |
260 | return 0; |
261 | } | |
262 | ||
5874583d | 263 | static int write_smc(u8 cmd, const char *key, const u8 *buffer, u8 len) |
6f2fad74 NB |
264 | { |
265 | int i; | |
266 | ||
5874583d HR |
267 | if (send_command(cmd) || send_argument(key)) { |
268 | pr_warn("%s: write arg fail\n", key); | |
6f2fad74 | 269 | return -EIO; |
6f2fad74 NB |
270 | } |
271 | ||
829917cd HR |
272 | if (send_byte(len, APPLESMC_DATA_PORT)) { |
273 | pr_warn("%.4s: write len fail\n", key); | |
274 | return -EIO; | |
275 | } | |
6f2fad74 NB |
276 | |
277 | for (i = 0; i < len; i++) { | |
829917cd | 278 | if (send_byte(buffer[i], APPLESMC_DATA_PORT)) { |
5874583d | 279 | pr_warn("%s: write data fail\n", key); |
6f2fad74 | 280 | return -EIO; |
5874583d | 281 | } |
6f2fad74 NB |
282 | } |
283 | ||
284 | return 0; | |
285 | } | |
286 | ||
5874583d HR |
287 | static int read_register_count(unsigned int *count) |
288 | { | |
289 | __be32 be; | |
290 | int ret; | |
291 | ||
292 | ret = read_smc(APPLESMC_READ_CMD, KEY_COUNT_KEY, (u8 *)&be, 4); | |
293 | if (ret) | |
294 | return ret; | |
295 | ||
296 | *count = be32_to_cpu(be); | |
297 | return 0; | |
298 | } | |
299 | ||
6f2fad74 | 300 | /* |
5874583d HR |
301 | * Serialized I/O |
302 | * | |
303 | * Returns zero on success or a negative error on failure. | |
304 | * All functions below are concurrency safe - callers should NOT hold lock. | |
6f2fad74 | 305 | */ |
5874583d HR |
306 | |
307 | static int applesmc_read_entry(const struct applesmc_entry *entry, | |
308 | u8 *buf, u8 len) | |
6f2fad74 | 309 | { |
5874583d | 310 | int ret; |
6f2fad74 | 311 | |
5874583d HR |
312 | if (entry->len != len) |
313 | return -EINVAL; | |
314 | mutex_lock(&smcreg.mutex); | |
315 | ret = read_smc(APPLESMC_READ_CMD, entry->key, buf, len); | |
316 | mutex_unlock(&smcreg.mutex); | |
6f2fad74 | 317 | |
5874583d HR |
318 | return ret; |
319 | } | |
320 | ||
321 | static int applesmc_write_entry(const struct applesmc_entry *entry, | |
322 | const u8 *buf, u8 len) | |
323 | { | |
324 | int ret; | |
325 | ||
326 | if (entry->len != len) | |
327 | return -EINVAL; | |
328 | mutex_lock(&smcreg.mutex); | |
329 | ret = write_smc(APPLESMC_WRITE_CMD, entry->key, buf, len); | |
330 | mutex_unlock(&smcreg.mutex); | |
331 | return ret; | |
332 | } | |
333 | ||
334 | static const struct applesmc_entry *applesmc_get_entry_by_index(int index) | |
335 | { | |
336 | struct applesmc_entry *cache = &smcreg.cache[index]; | |
337 | u8 key[4], info[6]; | |
338 | __be32 be; | |
339 | int ret = 0; | |
340 | ||
341 | if (cache->valid) | |
342 | return cache; | |
343 | ||
344 | mutex_lock(&smcreg.mutex); | |
345 | ||
346 | if (cache->valid) | |
347 | goto out; | |
348 | be = cpu_to_be32(index); | |
349 | ret = read_smc(APPLESMC_GET_KEY_BY_INDEX_CMD, (u8 *)&be, key, 4); | |
350 | if (ret) | |
351 | goto out; | |
352 | ret = read_smc(APPLESMC_GET_KEY_TYPE_CMD, key, info, 6); | |
353 | if (ret) | |
354 | goto out; | |
355 | ||
356 | memcpy(cache->key, key, 4); | |
357 | cache->len = info[0]; | |
358 | memcpy(cache->type, &info[1], 4); | |
359 | cache->flags = info[5]; | |
360 | cache->valid = 1; | |
361 | ||
362 | out: | |
363 | mutex_unlock(&smcreg.mutex); | |
364 | if (ret) | |
365 | return ERR_PTR(ret); | |
366 | return cache; | |
367 | } | |
368 | ||
369 | static int applesmc_get_lower_bound(unsigned int *lo, const char *key) | |
370 | { | |
371 | int begin = 0, end = smcreg.key_count; | |
372 | const struct applesmc_entry *entry; | |
373 | ||
374 | while (begin != end) { | |
375 | int middle = begin + (end - begin) / 2; | |
376 | entry = applesmc_get_entry_by_index(middle); | |
0fc86eca HR |
377 | if (IS_ERR(entry)) { |
378 | *lo = 0; | |
5874583d | 379 | return PTR_ERR(entry); |
0fc86eca | 380 | } |
5874583d HR |
381 | if (strcmp(entry->key, key) < 0) |
382 | begin = middle + 1; | |
383 | else | |
384 | end = middle; | |
6f2fad74 NB |
385 | } |
386 | ||
5874583d HR |
387 | *lo = begin; |
388 | return 0; | |
389 | } | |
6f2fad74 | 390 | |
5874583d HR |
391 | static int applesmc_get_upper_bound(unsigned int *hi, const char *key) |
392 | { | |
393 | int begin = 0, end = smcreg.key_count; | |
394 | const struct applesmc_entry *entry; | |
395 | ||
396 | while (begin != end) { | |
397 | int middle = begin + (end - begin) / 2; | |
398 | entry = applesmc_get_entry_by_index(middle); | |
0fc86eca HR |
399 | if (IS_ERR(entry)) { |
400 | *hi = smcreg.key_count; | |
5874583d | 401 | return PTR_ERR(entry); |
0fc86eca | 402 | } |
5874583d HR |
403 | if (strcmp(key, entry->key) < 0) |
404 | end = middle; | |
405 | else | |
406 | begin = middle + 1; | |
6f2fad74 | 407 | } |
6f2fad74 | 408 | |
5874583d | 409 | *hi = begin; |
6f2fad74 NB |
410 | return 0; |
411 | } | |
412 | ||
5874583d | 413 | static const struct applesmc_entry *applesmc_get_entry_by_key(const char *key) |
6f2fad74 | 414 | { |
5874583d HR |
415 | int begin, end; |
416 | int ret; | |
6f2fad74 | 417 | |
5874583d HR |
418 | ret = applesmc_get_lower_bound(&begin, key); |
419 | if (ret) | |
420 | return ERR_PTR(ret); | |
421 | ret = applesmc_get_upper_bound(&end, key); | |
422 | if (ret) | |
423 | return ERR_PTR(ret); | |
424 | if (end - begin != 1) | |
425 | return ERR_PTR(-EINVAL); | |
6f2fad74 | 426 | |
5874583d HR |
427 | return applesmc_get_entry_by_index(begin); |
428 | } | |
6f2fad74 | 429 | |
5874583d HR |
430 | static int applesmc_read_key(const char *key, u8 *buffer, u8 len) |
431 | { | |
432 | const struct applesmc_entry *entry; | |
6f2fad74 | 433 | |
5874583d HR |
434 | entry = applesmc_get_entry_by_key(key); |
435 | if (IS_ERR(entry)) | |
436 | return PTR_ERR(entry); | |
6f2fad74 | 437 | |
5874583d HR |
438 | return applesmc_read_entry(entry, buffer, len); |
439 | } | |
440 | ||
441 | static int applesmc_write_key(const char *key, const u8 *buffer, u8 len) | |
442 | { | |
443 | const struct applesmc_entry *entry; | |
444 | ||
445 | entry = applesmc_get_entry_by_key(key); | |
446 | if (IS_ERR(entry)) | |
447 | return PTR_ERR(entry); | |
448 | ||
449 | return applesmc_write_entry(entry, buffer, len); | |
6f2fad74 NB |
450 | } |
451 | ||
40ef06f1 HR |
452 | static int applesmc_has_key(const char *key, bool *value) |
453 | { | |
454 | const struct applesmc_entry *entry; | |
455 | ||
456 | entry = applesmc_get_entry_by_key(key); | |
457 | if (IS_ERR(entry) && PTR_ERR(entry) != -EINVAL) | |
458 | return PTR_ERR(entry); | |
459 | ||
460 | *value = !IS_ERR(entry); | |
461 | return 0; | |
462 | } | |
463 | ||
6f2fad74 | 464 | /* |
edf48f3a | 465 | * applesmc_read_s16 - Read 16-bit signed big endian register |
6f2fad74 | 466 | */ |
edf48f3a | 467 | static int applesmc_read_s16(const char *key, s16 *value) |
6f2fad74 NB |
468 | { |
469 | u8 buffer[2]; | |
470 | int ret; | |
471 | ||
edf48f3a HR |
472 | ret = applesmc_read_key(key, buffer, 2); |
473 | if (ret) | |
474 | return ret; | |
6f2fad74 NB |
475 | |
476 | *value = ((s16)buffer[0] << 8) | buffer[1]; | |
edf48f3a | 477 | return 0; |
6f2fad74 NB |
478 | } |
479 | ||
480 | /* | |
2344cd0c | 481 | * applesmc_device_init - initialize the accelerometer. Can sleep. |
6f2fad74 | 482 | */ |
2344cd0c | 483 | static void applesmc_device_init(void) |
6f2fad74 | 484 | { |
2344cd0c | 485 | int total; |
6f2fad74 NB |
486 | u8 buffer[2]; |
487 | ||
40ef06f1 | 488 | if (!smcreg.has_accelerometer) |
2344cd0c | 489 | return; |
6f2fad74 | 490 | |
6f2fad74 | 491 | for (total = INIT_TIMEOUT_MSECS; total > 0; total -= INIT_WAIT_MSECS) { |
6f2fad74 | 492 | if (!applesmc_read_key(MOTION_SENSOR_KEY, buffer, 2) && |
2344cd0c | 493 | (buffer[0] != 0x00 || buffer[1] != 0x00)) |
5874583d | 494 | return; |
6f2fad74 NB |
495 | buffer[0] = 0xe0; |
496 | buffer[1] = 0x00; | |
497 | applesmc_write_key(MOTION_SENSOR_KEY, buffer, 2); | |
498 | msleep(INIT_WAIT_MSECS); | |
499 | } | |
500 | ||
1ee7c71b | 501 | pr_warn("failed to init the device\n"); |
6f2fad74 NB |
502 | } |
503 | ||
e30bca12 HR |
504 | static int applesmc_init_index(struct applesmc_registers *s) |
505 | { | |
506 | const struct applesmc_entry *entry; | |
507 | unsigned int i; | |
508 | ||
509 | if (s->index) | |
510 | return 0; | |
511 | ||
512 | s->index = kcalloc(s->temp_count, sizeof(s->index[0]), GFP_KERNEL); | |
513 | if (!s->index) | |
514 | return -ENOMEM; | |
515 | ||
516 | for (i = s->temp_begin; i < s->temp_end; i++) { | |
517 | entry = applesmc_get_entry_by_index(i); | |
518 | if (IS_ERR(entry)) | |
519 | continue; | |
520 | if (strcmp(entry->type, TEMP_SENSOR_TYPE)) | |
521 | continue; | |
522 | s->index[s->index_count++] = entry->key; | |
523 | } | |
524 | ||
525 | return 0; | |
526 | } | |
527 | ||
5874583d HR |
528 | /* |
529 | * applesmc_init_smcreg_try - Try to initialize register cache. Idempotent. | |
530 | */ | |
531 | static int applesmc_init_smcreg_try(void) | |
532 | { | |
533 | struct applesmc_registers *s = &smcreg; | |
5e0a0ee4 | 534 | bool left_light_sensor = 0, right_light_sensor = 0; |
5f451386 | 535 | unsigned int count; |
3eba2bf7 | 536 | u8 tmp[1]; |
5874583d HR |
537 | int ret; |
538 | ||
539 | if (s->init_complete) | |
540 | return 0; | |
541 | ||
5f451386 | 542 | ret = read_register_count(&count); |
5874583d HR |
543 | if (ret) |
544 | return ret; | |
545 | ||
5f451386 HR |
546 | if (s->cache && s->key_count != count) { |
547 | pr_warn("key count changed from %d to %d\n", | |
548 | s->key_count, count); | |
549 | kfree(s->cache); | |
550 | s->cache = NULL; | |
551 | } | |
552 | s->key_count = count; | |
553 | ||
5874583d HR |
554 | if (!s->cache) |
555 | s->cache = kcalloc(s->key_count, sizeof(*s->cache), GFP_KERNEL); | |
556 | if (!s->cache) | |
557 | return -ENOMEM; | |
558 | ||
3eba2bf7 HR |
559 | ret = applesmc_read_key(FANS_COUNT, tmp, 1); |
560 | if (ret) | |
561 | return ret; | |
562 | s->fan_count = tmp[0]; | |
1009ccdc GR |
563 | if (s->fan_count > 10) |
564 | s->fan_count = 10; | |
3eba2bf7 | 565 | |
9792dadf HR |
566 | ret = applesmc_get_lower_bound(&s->temp_begin, "T"); |
567 | if (ret) | |
568 | return ret; | |
569 | ret = applesmc_get_lower_bound(&s->temp_end, "U"); | |
570 | if (ret) | |
571 | return ret; | |
572 | s->temp_count = s->temp_end - s->temp_begin; | |
573 | ||
e30bca12 HR |
574 | ret = applesmc_init_index(s); |
575 | if (ret) | |
576 | return ret; | |
577 | ||
40ef06f1 HR |
578 | ret = applesmc_has_key(LIGHT_SENSOR_LEFT_KEY, &left_light_sensor); |
579 | if (ret) | |
580 | return ret; | |
581 | ret = applesmc_has_key(LIGHT_SENSOR_RIGHT_KEY, &right_light_sensor); | |
582 | if (ret) | |
583 | return ret; | |
584 | ret = applesmc_has_key(MOTION_SENSOR_KEY, &s->has_accelerometer); | |
585 | if (ret) | |
586 | return ret; | |
587 | ret = applesmc_has_key(BACKLIGHT_KEY, &s->has_key_backlight); | |
588 | if (ret) | |
589 | return ret; | |
590 | ||
591 | s->num_light_sensors = left_light_sensor + right_light_sensor; | |
5874583d HR |
592 | s->init_complete = true; |
593 | ||
e30bca12 HR |
594 | pr_info("key=%d fan=%d temp=%d index=%d acc=%d lux=%d kbd=%d\n", |
595 | s->key_count, s->fan_count, s->temp_count, s->index_count, | |
40ef06f1 HR |
596 | s->has_accelerometer, |
597 | s->num_light_sensors, | |
598 | s->has_key_backlight); | |
5874583d HR |
599 | |
600 | return 0; | |
601 | } | |
602 | ||
e30bca12 HR |
603 | static void applesmc_destroy_smcreg(void) |
604 | { | |
605 | kfree(smcreg.index); | |
606 | smcreg.index = NULL; | |
607 | kfree(smcreg.cache); | |
608 | smcreg.cache = NULL; | |
609 | smcreg.init_complete = false; | |
610 | } | |
611 | ||
5874583d HR |
612 | /* |
613 | * applesmc_init_smcreg - Initialize register cache. | |
614 | * | |
615 | * Retries until initialization is successful, or the operation times out. | |
616 | * | |
617 | */ | |
618 | static int applesmc_init_smcreg(void) | |
619 | { | |
620 | int ms, ret; | |
621 | ||
622 | for (ms = 0; ms < INIT_TIMEOUT_MSECS; ms += INIT_WAIT_MSECS) { | |
623 | ret = applesmc_init_smcreg_try(); | |
624 | if (!ret) { | |
625 | if (ms) | |
626 | pr_info("init_smcreg() took %d ms\n", ms); | |
627 | return 0; | |
628 | } | |
629 | msleep(INIT_WAIT_MSECS); | |
630 | } | |
631 | ||
e30bca12 | 632 | applesmc_destroy_smcreg(); |
5874583d HR |
633 | |
634 | return ret; | |
635 | } | |
636 | ||
6f2fad74 NB |
637 | /* Device model stuff */ |
638 | static int applesmc_probe(struct platform_device *dev) | |
639 | { | |
5874583d HR |
640 | int ret; |
641 | ||
642 | ret = applesmc_init_smcreg(); | |
643 | if (ret) | |
644 | return ret; | |
645 | ||
2344cd0c | 646 | applesmc_device_init(); |
6f2fad74 | 647 | |
6f2fad74 NB |
648 | return 0; |
649 | } | |
650 | ||
a976f150 HR |
651 | /* Synchronize device with memorized backlight state */ |
652 | static int applesmc_pm_resume(struct device *dev) | |
653 | { | |
40ef06f1 | 654 | if (smcreg.has_key_backlight) |
a976f150 | 655 | applesmc_write_key(BACKLIGHT_KEY, backlight_state, 2); |
a976f150 HR |
656 | return 0; |
657 | } | |
658 | ||
659 | /* Reinitialize device on resume from hibernation */ | |
660 | static int applesmc_pm_restore(struct device *dev) | |
6f2fad74 | 661 | { |
2344cd0c | 662 | applesmc_device_init(); |
a976f150 | 663 | return applesmc_pm_resume(dev); |
6f2fad74 NB |
664 | } |
665 | ||
47145210 | 666 | static const struct dev_pm_ops applesmc_pm_ops = { |
a976f150 HR |
667 | .resume = applesmc_pm_resume, |
668 | .restore = applesmc_pm_restore, | |
669 | }; | |
670 | ||
6f2fad74 NB |
671 | static struct platform_driver applesmc_driver = { |
672 | .probe = applesmc_probe, | |
6f2fad74 NB |
673 | .driver = { |
674 | .name = "applesmc", | |
a976f150 | 675 | .pm = &applesmc_pm_ops, |
6f2fad74 NB |
676 | }, |
677 | }; | |
678 | ||
679 | /* | |
680 | * applesmc_calibrate - Set our "resting" values. Callers must | |
681 | * hold applesmc_lock. | |
682 | */ | |
683 | static void applesmc_calibrate(void) | |
684 | { | |
edf48f3a HR |
685 | applesmc_read_s16(MOTION_SENSOR_X_KEY, &rest_x); |
686 | applesmc_read_s16(MOTION_SENSOR_Y_KEY, &rest_y); | |
6f2fad74 NB |
687 | rest_x = -rest_x; |
688 | } | |
689 | ||
58d5aa5c | 690 | static void applesmc_idev_poll(struct input_dev *idev) |
6f2fad74 NB |
691 | { |
692 | s16 x, y; | |
693 | ||
edf48f3a | 694 | if (applesmc_read_s16(MOTION_SENSOR_X_KEY, &x)) |
5874583d | 695 | return; |
edf48f3a | 696 | if (applesmc_read_s16(MOTION_SENSOR_Y_KEY, &y)) |
5874583d | 697 | return; |
6f2fad74 NB |
698 | |
699 | x = -x; | |
d5cf2b99 DT |
700 | input_report_abs(idev, ABS_X, x - rest_x); |
701 | input_report_abs(idev, ABS_Y, y - rest_y); | |
702 | input_sync(idev); | |
6f2fad74 NB |
703 | } |
704 | ||
705 | /* Sysfs Files */ | |
706 | ||
fa74419b NB |
707 | static ssize_t applesmc_name_show(struct device *dev, |
708 | struct device_attribute *attr, char *buf) | |
709 | { | |
710 | return snprintf(buf, PAGE_SIZE, "applesmc\n"); | |
711 | } | |
712 | ||
6f2fad74 NB |
713 | static ssize_t applesmc_position_show(struct device *dev, |
714 | struct device_attribute *attr, char *buf) | |
715 | { | |
716 | int ret; | |
717 | s16 x, y, z; | |
718 | ||
edf48f3a | 719 | ret = applesmc_read_s16(MOTION_SENSOR_X_KEY, &x); |
6f2fad74 NB |
720 | if (ret) |
721 | goto out; | |
edf48f3a | 722 | ret = applesmc_read_s16(MOTION_SENSOR_Y_KEY, &y); |
6f2fad74 NB |
723 | if (ret) |
724 | goto out; | |
edf48f3a | 725 | ret = applesmc_read_s16(MOTION_SENSOR_Z_KEY, &z); |
6f2fad74 NB |
726 | if (ret) |
727 | goto out; | |
728 | ||
729 | out: | |
6f2fad74 NB |
730 | if (ret) |
731 | return ret; | |
732 | else | |
733 | return snprintf(buf, PAGE_SIZE, "(%d,%d,%d)\n", x, y, z); | |
734 | } | |
735 | ||
736 | static ssize_t applesmc_light_show(struct device *dev, | |
737 | struct device_attribute *attr, char *sysfsbuf) | |
738 | { | |
5874583d | 739 | const struct applesmc_entry *entry; |
8bd1a12a | 740 | static int data_length; |
6f2fad74 NB |
741 | int ret; |
742 | u8 left = 0, right = 0; | |
5874583d | 743 | u8 buffer[10]; |
6f2fad74 | 744 | |
8bd1a12a | 745 | if (!data_length) { |
5874583d HR |
746 | entry = applesmc_get_entry_by_key(LIGHT_SENSOR_LEFT_KEY); |
747 | if (IS_ERR(entry)) | |
748 | return PTR_ERR(entry); | |
749 | if (entry->len > 10) | |
750 | return -ENXIO; | |
751 | data_length = entry->len; | |
1ee7c71b | 752 | pr_info("light sensor data length set to %d\n", data_length); |
8bd1a12a HR |
753 | } |
754 | ||
755 | ret = applesmc_read_key(LIGHT_SENSOR_LEFT_KEY, buffer, data_length); | |
c3d6362b AM |
756 | /* newer macbooks report a single 10-bit bigendian value */ |
757 | if (data_length == 10) { | |
758 | left = be16_to_cpu(*(__be16 *)(buffer + 6)) >> 2; | |
759 | goto out; | |
760 | } | |
6f2fad74 NB |
761 | left = buffer[2]; |
762 | if (ret) | |
763 | goto out; | |
8bd1a12a | 764 | ret = applesmc_read_key(LIGHT_SENSOR_RIGHT_KEY, buffer, data_length); |
6f2fad74 NB |
765 | right = buffer[2]; |
766 | ||
767 | out: | |
6f2fad74 NB |
768 | if (ret) |
769 | return ret; | |
770 | else | |
771 | return snprintf(sysfsbuf, PAGE_SIZE, "(%d,%d)\n", left, right); | |
772 | } | |
773 | ||
fa5575cf AM |
774 | /* Displays sensor key as label */ |
775 | static ssize_t applesmc_show_sensor_label(struct device *dev, | |
776 | struct device_attribute *devattr, char *sysfsbuf) | |
777 | { | |
e30bca12 | 778 | const char *key = smcreg.index[to_index(devattr)]; |
fa5575cf | 779 | |
e30bca12 | 780 | return snprintf(sysfsbuf, PAGE_SIZE, "%s\n", key); |
fa5575cf AM |
781 | } |
782 | ||
6f2fad74 NB |
783 | /* Displays degree Celsius * 1000 */ |
784 | static ssize_t applesmc_show_temperature(struct device *dev, | |
785 | struct device_attribute *devattr, char *sysfsbuf) | |
786 | { | |
e30bca12 | 787 | const char *key = smcreg.index[to_index(devattr)]; |
6f2fad74 | 788 | int ret; |
b6e5122f HR |
789 | s16 value; |
790 | int temp; | |
6f2fad74 | 791 | |
e30bca12 | 792 | ret = applesmc_read_s16(key, &value); |
6f2fad74 NB |
793 | if (ret) |
794 | return ret; | |
9792dadf | 795 | |
b6e5122f | 796 | temp = 250 * (value >> 6); |
9792dadf | 797 | |
b6e5122f | 798 | return snprintf(sysfsbuf, PAGE_SIZE, "%d\n", temp); |
6f2fad74 NB |
799 | } |
800 | ||
801 | static ssize_t applesmc_show_fan_speed(struct device *dev, | |
802 | struct device_attribute *attr, char *sysfsbuf) | |
803 | { | |
804 | int ret; | |
805 | unsigned int speed = 0; | |
806 | char newkey[5]; | |
807 | u8 buffer[2]; | |
6f2fad74 | 808 | |
1009ccdc GR |
809 | scnprintf(newkey, sizeof(newkey), fan_speed_fmt[to_option(attr)], |
810 | to_index(attr)); | |
6f2fad74 | 811 | |
6f2fad74 NB |
812 | ret = applesmc_read_key(newkey, buffer, 2); |
813 | speed = ((buffer[0] << 8 | buffer[1]) >> 2); | |
814 | ||
6f2fad74 NB |
815 | if (ret) |
816 | return ret; | |
817 | else | |
818 | return snprintf(sysfsbuf, PAGE_SIZE, "%u\n", speed); | |
819 | } | |
820 | ||
821 | static ssize_t applesmc_store_fan_speed(struct device *dev, | |
822 | struct device_attribute *attr, | |
823 | const char *sysfsbuf, size_t count) | |
824 | { | |
825 | int ret; | |
2bfe8148 | 826 | unsigned long speed; |
6f2fad74 NB |
827 | char newkey[5]; |
828 | u8 buffer[2]; | |
6f2fad74 | 829 | |
179c4fdb | 830 | if (kstrtoul(sysfsbuf, 10, &speed) < 0 || speed >= 0x4000) |
2bfe8148 | 831 | return -EINVAL; /* Bigger than a 14-bit value */ |
6f2fad74 | 832 | |
1009ccdc GR |
833 | scnprintf(newkey, sizeof(newkey), fan_speed_fmt[to_option(attr)], |
834 | to_index(attr)); | |
6f2fad74 | 835 | |
6f2fad74 NB |
836 | buffer[0] = (speed >> 6) & 0xff; |
837 | buffer[1] = (speed << 2) & 0xff; | |
838 | ret = applesmc_write_key(newkey, buffer, 2); | |
839 | ||
6f2fad74 NB |
840 | if (ret) |
841 | return ret; | |
842 | else | |
843 | return count; | |
844 | } | |
845 | ||
846 | static ssize_t applesmc_show_fan_manual(struct device *dev, | |
3eba2bf7 | 847 | struct device_attribute *attr, char *sysfsbuf) |
6f2fad74 NB |
848 | { |
849 | int ret; | |
850 | u16 manual = 0; | |
851 | u8 buffer[2]; | |
6f2fad74 | 852 | |
6f2fad74 | 853 | ret = applesmc_read_key(FANS_MANUAL, buffer, 2); |
3eba2bf7 | 854 | manual = ((buffer[0] << 8 | buffer[1]) >> to_index(attr)) & 0x01; |
6f2fad74 | 855 | |
6f2fad74 NB |
856 | if (ret) |
857 | return ret; | |
858 | else | |
859 | return snprintf(sysfsbuf, PAGE_SIZE, "%d\n", manual); | |
860 | } | |
861 | ||
862 | static ssize_t applesmc_store_fan_manual(struct device *dev, | |
3eba2bf7 | 863 | struct device_attribute *attr, |
6f2fad74 NB |
864 | const char *sysfsbuf, size_t count) |
865 | { | |
866 | int ret; | |
867 | u8 buffer[2]; | |
2bfe8148 | 868 | unsigned long input; |
6f2fad74 | 869 | u16 val; |
6f2fad74 | 870 | |
179c4fdb | 871 | if (kstrtoul(sysfsbuf, 10, &input) < 0) |
2bfe8148 | 872 | return -EINVAL; |
6f2fad74 | 873 | |
6f2fad74 NB |
874 | ret = applesmc_read_key(FANS_MANUAL, buffer, 2); |
875 | val = (buffer[0] << 8 | buffer[1]); | |
876 | if (ret) | |
877 | goto out; | |
878 | ||
879 | if (input) | |
3eba2bf7 | 880 | val = val | (0x01 << to_index(attr)); |
6f2fad74 | 881 | else |
3eba2bf7 | 882 | val = val & ~(0x01 << to_index(attr)); |
6f2fad74 NB |
883 | |
884 | buffer[0] = (val >> 8) & 0xFF; | |
885 | buffer[1] = val & 0xFF; | |
886 | ||
887 | ret = applesmc_write_key(FANS_MANUAL, buffer, 2); | |
888 | ||
889 | out: | |
6f2fad74 NB |
890 | if (ret) |
891 | return ret; | |
892 | else | |
893 | return count; | |
894 | } | |
895 | ||
896 | static ssize_t applesmc_show_fan_position(struct device *dev, | |
897 | struct device_attribute *attr, char *sysfsbuf) | |
898 | { | |
899 | int ret; | |
900 | char newkey[5]; | |
901 | u8 buffer[17]; | |
6f2fad74 | 902 | |
1009ccdc | 903 | scnprintf(newkey, sizeof(newkey), FAN_ID_FMT, to_index(attr)); |
6f2fad74 | 904 | |
6f2fad74 NB |
905 | ret = applesmc_read_key(newkey, buffer, 16); |
906 | buffer[16] = 0; | |
907 | ||
6f2fad74 NB |
908 | if (ret) |
909 | return ret; | |
910 | else | |
911 | return snprintf(sysfsbuf, PAGE_SIZE, "%s\n", buffer+4); | |
912 | } | |
913 | ||
914 | static ssize_t applesmc_calibrate_show(struct device *dev, | |
915 | struct device_attribute *attr, char *sysfsbuf) | |
916 | { | |
917 | return snprintf(sysfsbuf, PAGE_SIZE, "(%d,%d)\n", rest_x, rest_y); | |
918 | } | |
919 | ||
920 | static ssize_t applesmc_calibrate_store(struct device *dev, | |
921 | struct device_attribute *attr, const char *sysfsbuf, size_t count) | |
922 | { | |
6f2fad74 | 923 | applesmc_calibrate(); |
6f2fad74 NB |
924 | |
925 | return count; | |
926 | } | |
927 | ||
6f2fad74 NB |
928 | static void applesmc_backlight_set(struct work_struct *work) |
929 | { | |
a976f150 | 930 | applesmc_write_key(BACKLIGHT_KEY, backlight_state, 2); |
6f2fad74 NB |
931 | } |
932 | static DECLARE_WORK(backlight_work, &applesmc_backlight_set); | |
933 | ||
934 | static void applesmc_brightness_set(struct led_classdev *led_cdev, | |
935 | enum led_brightness value) | |
936 | { | |
937 | int ret; | |
938 | ||
a976f150 | 939 | backlight_state[0] = value; |
6f2fad74 NB |
940 | ret = queue_work(applesmc_led_wq, &backlight_work); |
941 | ||
942 | if (debug && (!ret)) | |
692fe501 | 943 | dev_dbg(led_cdev->dev, "work was already on the queue.\n"); |
6f2fad74 NB |
944 | } |
945 | ||
946 | static ssize_t applesmc_key_count_show(struct device *dev, | |
947 | struct device_attribute *attr, char *sysfsbuf) | |
948 | { | |
949 | int ret; | |
950 | u8 buffer[4]; | |
951 | u32 count; | |
952 | ||
6f2fad74 NB |
953 | ret = applesmc_read_key(KEY_COUNT_KEY, buffer, 4); |
954 | count = ((u32)buffer[0]<<24) + ((u32)buffer[1]<<16) + | |
955 | ((u32)buffer[2]<<8) + buffer[3]; | |
956 | ||
6f2fad74 NB |
957 | if (ret) |
958 | return ret; | |
959 | else | |
960 | return snprintf(sysfsbuf, PAGE_SIZE, "%d\n", count); | |
961 | } | |
962 | ||
963 | static ssize_t applesmc_key_at_index_read_show(struct device *dev, | |
964 | struct device_attribute *attr, char *sysfsbuf) | |
965 | { | |
5874583d | 966 | const struct applesmc_entry *entry; |
6f2fad74 NB |
967 | int ret; |
968 | ||
5874583d HR |
969 | entry = applesmc_get_entry_by_index(key_at_index); |
970 | if (IS_ERR(entry)) | |
971 | return PTR_ERR(entry); | |
972 | ret = applesmc_read_entry(entry, sysfsbuf, entry->len); | |
973 | if (ret) | |
6f2fad74 | 974 | return ret; |
6f2fad74 | 975 | |
5874583d | 976 | return entry->len; |
6f2fad74 NB |
977 | } |
978 | ||
979 | static ssize_t applesmc_key_at_index_data_length_show(struct device *dev, | |
980 | struct device_attribute *attr, char *sysfsbuf) | |
981 | { | |
5874583d | 982 | const struct applesmc_entry *entry; |
6f2fad74 | 983 | |
5874583d HR |
984 | entry = applesmc_get_entry_by_index(key_at_index); |
985 | if (IS_ERR(entry)) | |
986 | return PTR_ERR(entry); | |
6f2fad74 | 987 | |
5874583d | 988 | return snprintf(sysfsbuf, PAGE_SIZE, "%d\n", entry->len); |
6f2fad74 NB |
989 | } |
990 | ||
991 | static ssize_t applesmc_key_at_index_type_show(struct device *dev, | |
992 | struct device_attribute *attr, char *sysfsbuf) | |
993 | { | |
5874583d | 994 | const struct applesmc_entry *entry; |
6f2fad74 | 995 | |
5874583d HR |
996 | entry = applesmc_get_entry_by_index(key_at_index); |
997 | if (IS_ERR(entry)) | |
998 | return PTR_ERR(entry); | |
6f2fad74 | 999 | |
5874583d | 1000 | return snprintf(sysfsbuf, PAGE_SIZE, "%s\n", entry->type); |
6f2fad74 NB |
1001 | } |
1002 | ||
1003 | static ssize_t applesmc_key_at_index_name_show(struct device *dev, | |
1004 | struct device_attribute *attr, char *sysfsbuf) | |
1005 | { | |
5874583d | 1006 | const struct applesmc_entry *entry; |
6f2fad74 | 1007 | |
5874583d HR |
1008 | entry = applesmc_get_entry_by_index(key_at_index); |
1009 | if (IS_ERR(entry)) | |
1010 | return PTR_ERR(entry); | |
6f2fad74 | 1011 | |
5874583d | 1012 | return snprintf(sysfsbuf, PAGE_SIZE, "%s\n", entry->key); |
6f2fad74 NB |
1013 | } |
1014 | ||
1015 | static ssize_t applesmc_key_at_index_show(struct device *dev, | |
1016 | struct device_attribute *attr, char *sysfsbuf) | |
1017 | { | |
1018 | return snprintf(sysfsbuf, PAGE_SIZE, "%d\n", key_at_index); | |
1019 | } | |
1020 | ||
1021 | static ssize_t applesmc_key_at_index_store(struct device *dev, | |
1022 | struct device_attribute *attr, const char *sysfsbuf, size_t count) | |
1023 | { | |
5874583d | 1024 | unsigned long newkey; |
6f2fad74 | 1025 | |
179c4fdb | 1026 | if (kstrtoul(sysfsbuf, 10, &newkey) < 0 |
5874583d HR |
1027 | || newkey >= smcreg.key_count) |
1028 | return -EINVAL; | |
6f2fad74 | 1029 | |
5874583d | 1030 | key_at_index = newkey; |
6f2fad74 NB |
1031 | return count; |
1032 | } | |
1033 | ||
1034 | static struct led_classdev applesmc_backlight = { | |
6c152bee | 1035 | .name = "smc::kbd_backlight", |
6f2fad74 NB |
1036 | .default_trigger = "nand-disk", |
1037 | .brightness_set = applesmc_brightness_set, | |
1038 | }; | |
1039 | ||
0b0b5dff HR |
1040 | static struct applesmc_node_group info_group[] = { |
1041 | { "name", applesmc_name_show }, | |
1042 | { "key_count", applesmc_key_count_show }, | |
1043 | { "key_at_index", applesmc_key_at_index_show, applesmc_key_at_index_store }, | |
1044 | { "key_at_index_name", applesmc_key_at_index_name_show }, | |
1045 | { "key_at_index_type", applesmc_key_at_index_type_show }, | |
1046 | { "key_at_index_data_length", applesmc_key_at_index_data_length_show }, | |
1047 | { "key_at_index_data", applesmc_key_at_index_read_show }, | |
1048 | { } | |
6f2fad74 NB |
1049 | }; |
1050 | ||
0b0b5dff HR |
1051 | static struct applesmc_node_group accelerometer_group[] = { |
1052 | { "position", applesmc_position_show }, | |
1053 | { "calibrate", applesmc_calibrate_show, applesmc_calibrate_store }, | |
1054 | { } | |
6f2fad74 NB |
1055 | }; |
1056 | ||
0b0b5dff HR |
1057 | static struct applesmc_node_group light_sensor_group[] = { |
1058 | { "light", applesmc_light_show }, | |
1059 | { } | |
1060 | }; | |
6f2fad74 | 1061 | |
3eba2bf7 HR |
1062 | static struct applesmc_node_group fan_group[] = { |
1063 | { "fan%d_label", applesmc_show_fan_position }, | |
1064 | { "fan%d_input", applesmc_show_fan_speed, NULL, 0 }, | |
1065 | { "fan%d_min", applesmc_show_fan_speed, applesmc_store_fan_speed, 1 }, | |
1066 | { "fan%d_max", applesmc_show_fan_speed, NULL, 2 }, | |
1067 | { "fan%d_safe", applesmc_show_fan_speed, NULL, 3 }, | |
1068 | { "fan%d_output", applesmc_show_fan_speed, applesmc_store_fan_speed, 4 }, | |
1069 | { "fan%d_manual", applesmc_show_fan_manual, applesmc_store_fan_manual }, | |
1070 | { } | |
6f2fad74 NB |
1071 | }; |
1072 | ||
9792dadf HR |
1073 | static struct applesmc_node_group temp_group[] = { |
1074 | { "temp%d_label", applesmc_show_sensor_label }, | |
1075 | { "temp%d_input", applesmc_show_temperature }, | |
1076 | { } | |
fa5575cf AM |
1077 | }; |
1078 | ||
6f2fad74 NB |
1079 | /* Module stuff */ |
1080 | ||
9792dadf HR |
1081 | /* |
1082 | * applesmc_destroy_nodes - remove files and free associated memory | |
1083 | */ | |
1084 | static void applesmc_destroy_nodes(struct applesmc_node_group *groups) | |
1085 | { | |
1086 | struct applesmc_node_group *grp; | |
1087 | struct applesmc_dev_attr *node; | |
1088 | ||
1089 | for (grp = groups; grp->nodes; grp++) { | |
1090 | for (node = grp->nodes; node->sda.dev_attr.attr.name; node++) | |
1091 | sysfs_remove_file(&pdev->dev.kobj, | |
1092 | &node->sda.dev_attr.attr); | |
1093 | kfree(grp->nodes); | |
1094 | grp->nodes = NULL; | |
1095 | } | |
1096 | } | |
1097 | ||
1098 | /* | |
1099 | * applesmc_create_nodes - create a two-dimensional group of sysfs files | |
1100 | */ | |
1101 | static int applesmc_create_nodes(struct applesmc_node_group *groups, int num) | |
1102 | { | |
1103 | struct applesmc_node_group *grp; | |
1104 | struct applesmc_dev_attr *node; | |
1105 | struct attribute *attr; | |
1106 | int ret, i; | |
1107 | ||
1108 | for (grp = groups; grp->format; grp++) { | |
1109 | grp->nodes = kcalloc(num + 1, sizeof(*node), GFP_KERNEL); | |
1110 | if (!grp->nodes) { | |
1111 | ret = -ENOMEM; | |
1112 | goto out; | |
1113 | } | |
1114 | for (i = 0; i < num; i++) { | |
1115 | node = &grp->nodes[i]; | |
1009ccdc GR |
1116 | scnprintf(node->name, sizeof(node->name), grp->format, |
1117 | i + 1); | |
3eba2bf7 | 1118 | node->sda.index = (grp->option << 16) | (i & 0xffff); |
9792dadf HR |
1119 | node->sda.dev_attr.show = grp->show; |
1120 | node->sda.dev_attr.store = grp->store; | |
1121 | attr = &node->sda.dev_attr.attr; | |
9d1f8a40 | 1122 | sysfs_attr_init(attr); |
9792dadf | 1123 | attr->name = node->name; |
71ee4a40 | 1124 | attr->mode = 0444 | (grp->store ? 0200 : 0); |
9792dadf HR |
1125 | ret = sysfs_create_file(&pdev->dev.kobj, attr); |
1126 | if (ret) { | |
1127 | attr->name = NULL; | |
1128 | goto out; | |
1129 | } | |
1130 | } | |
1131 | } | |
1132 | ||
1133 | return 0; | |
1134 | out: | |
1135 | applesmc_destroy_nodes(groups); | |
1136 | return ret; | |
1137 | } | |
1138 | ||
0c6cac7a | 1139 | /* Create accelerometer resources */ |
6f2fad74 NB |
1140 | static int applesmc_create_accelerometer(void) |
1141 | { | |
1142 | int ret; | |
1143 | ||
0b0b5dff HR |
1144 | if (!smcreg.has_accelerometer) |
1145 | return 0; | |
1146 | ||
1147 | ret = applesmc_create_nodes(accelerometer_group, 1); | |
6f2fad74 NB |
1148 | if (ret) |
1149 | goto out; | |
1150 | ||
58d5aa5c | 1151 | applesmc_idev = input_allocate_device(); |
6f2fad74 NB |
1152 | if (!applesmc_idev) { |
1153 | ret = -ENOMEM; | |
1154 | goto out_sysfs; | |
1155 | } | |
1156 | ||
1157 | /* initial calibrate for the input device */ | |
1158 | applesmc_calibrate(); | |
1159 | ||
d5cf2b99 | 1160 | /* initialize the input device */ |
58d5aa5c DT |
1161 | applesmc_idev->name = "applesmc"; |
1162 | applesmc_idev->id.bustype = BUS_HOST; | |
1163 | applesmc_idev->dev.parent = &pdev->dev; | |
1164 | input_set_abs_params(applesmc_idev, ABS_X, | |
6f2fad74 | 1165 | -256, 256, APPLESMC_INPUT_FUZZ, APPLESMC_INPUT_FLAT); |
58d5aa5c | 1166 | input_set_abs_params(applesmc_idev, ABS_Y, |
6f2fad74 NB |
1167 | -256, 256, APPLESMC_INPUT_FUZZ, APPLESMC_INPUT_FLAT); |
1168 | ||
58d5aa5c DT |
1169 | ret = input_setup_polling(applesmc_idev, applesmc_idev_poll); |
1170 | if (ret) | |
1171 | goto out_idev; | |
1172 | ||
1173 | input_set_poll_interval(applesmc_idev, APPLESMC_POLL_INTERVAL); | |
1174 | ||
1175 | ret = input_register_device(applesmc_idev); | |
6f2fad74 NB |
1176 | if (ret) |
1177 | goto out_idev; | |
1178 | ||
6f2fad74 NB |
1179 | return 0; |
1180 | ||
1181 | out_idev: | |
58d5aa5c | 1182 | input_free_device(applesmc_idev); |
6f2fad74 NB |
1183 | |
1184 | out_sysfs: | |
0b0b5dff | 1185 | applesmc_destroy_nodes(accelerometer_group); |
6f2fad74 NB |
1186 | |
1187 | out: | |
1ee7c71b | 1188 | pr_warn("driver init failed (ret=%d)!\n", ret); |
6f2fad74 NB |
1189 | return ret; |
1190 | } | |
1191 | ||
0c6cac7a | 1192 | /* Release all resources used by the accelerometer */ |
6f2fad74 NB |
1193 | static void applesmc_release_accelerometer(void) |
1194 | { | |
0b0b5dff HR |
1195 | if (!smcreg.has_accelerometer) |
1196 | return; | |
58d5aa5c | 1197 | input_unregister_device(applesmc_idev); |
0b0b5dff | 1198 | applesmc_destroy_nodes(accelerometer_group); |
6f2fad74 | 1199 | } |
0b0b5dff HR |
1200 | |
1201 | static int applesmc_create_light_sensor(void) | |
1202 | { | |
1203 | if (!smcreg.num_light_sensors) | |
1204 | return 0; | |
1205 | return applesmc_create_nodes(light_sensor_group, 1); | |
1206 | } | |
1207 | ||
1208 | static void applesmc_release_light_sensor(void) | |
1209 | { | |
1210 | if (!smcreg.num_light_sensors) | |
1211 | return; | |
1212 | applesmc_destroy_nodes(light_sensor_group); | |
1213 | } | |
1214 | ||
1215 | static int applesmc_create_key_backlight(void) | |
1216 | { | |
1217 | if (!smcreg.has_key_backlight) | |
1218 | return 0; | |
1219 | applesmc_led_wq = create_singlethread_workqueue("applesmc-led"); | |
1220 | if (!applesmc_led_wq) | |
1221 | return -ENOMEM; | |
1222 | return led_classdev_register(&pdev->dev, &applesmc_backlight); | |
1223 | } | |
1224 | ||
1225 | static void applesmc_release_key_backlight(void) | |
1226 | { | |
1227 | if (!smcreg.has_key_backlight) | |
1228 | return; | |
1229 | led_classdev_unregister(&applesmc_backlight); | |
1230 | destroy_workqueue(applesmc_led_wq); | |
1231 | } | |
1232 | ||
40ef06f1 HR |
1233 | static int applesmc_dmi_match(const struct dmi_system_id *id) |
1234 | { | |
1235 | return 1; | |
1236 | } | |
6f2fad74 | 1237 | |
85ebfd3e GR |
1238 | /* |
1239 | * Note that DMI_MATCH(...,"MacBook") will match "MacBookPro1,1". | |
1240 | * So we need to put "Apple MacBook Pro" before "Apple MacBook". | |
1241 | */ | |
6faadbbb | 1242 | static const struct dmi_system_id applesmc_whitelist[] __initconst = { |
f5274c97 HR |
1243 | { applesmc_dmi_match, "Apple MacBook Air", { |
1244 | DMI_MATCH(DMI_BOARD_VENDOR, "Apple"), | |
1245 | DMI_MATCH(DMI_PRODUCT_NAME, "MacBookAir") }, | |
40ef06f1 | 1246 | }, |
6f2fad74 | 1247 | { applesmc_dmi_match, "Apple MacBook Pro", { |
2bfe8148 GR |
1248 | DMI_MATCH(DMI_BOARD_VENDOR, "Apple"), |
1249 | DMI_MATCH(DMI_PRODUCT_NAME, "MacBookPro") }, | |
40ef06f1 | 1250 | }, |
cd19ba13 | 1251 | { applesmc_dmi_match, "Apple MacBook", { |
2bfe8148 GR |
1252 | DMI_MATCH(DMI_BOARD_VENDOR, "Apple"), |
1253 | DMI_MATCH(DMI_PRODUCT_NAME, "MacBook") }, | |
40ef06f1 | 1254 | }, |
6f2fad74 | 1255 | { applesmc_dmi_match, "Apple Macmini", { |
2bfe8148 GR |
1256 | DMI_MATCH(DMI_BOARD_VENDOR, "Apple"), |
1257 | DMI_MATCH(DMI_PRODUCT_NAME, "Macmini") }, | |
40ef06f1 | 1258 | }, |
45a3a36b HR |
1259 | { applesmc_dmi_match, "Apple MacPro", { |
1260 | DMI_MATCH(DMI_BOARD_VENDOR, "Apple"), | |
1261 | DMI_MATCH(DMI_PRODUCT_NAME, "MacPro") }, | |
40ef06f1 | 1262 | }, |
9f86f28d | 1263 | { applesmc_dmi_match, "Apple iMac", { |
2bfe8148 GR |
1264 | DMI_MATCH(DMI_BOARD_VENDOR, "Apple"), |
1265 | DMI_MATCH(DMI_PRODUCT_NAME, "iMac") }, | |
40ef06f1 | 1266 | }, |
6f2fad74 NB |
1267 | { .ident = NULL } |
1268 | }; | |
1269 | ||
1270 | static int __init applesmc_init(void) | |
1271 | { | |
1272 | int ret; | |
6f2fad74 | 1273 | |
6f2fad74 | 1274 | if (!dmi_check_system(applesmc_whitelist)) { |
1ee7c71b | 1275 | pr_warn("supported laptop not found!\n"); |
6f2fad74 NB |
1276 | ret = -ENODEV; |
1277 | goto out; | |
1278 | } | |
1279 | ||
1280 | if (!request_region(APPLESMC_DATA_PORT, APPLESMC_NR_PORTS, | |
1281 | "applesmc")) { | |
1282 | ret = -ENXIO; | |
1283 | goto out; | |
1284 | } | |
1285 | ||
1286 | ret = platform_driver_register(&applesmc_driver); | |
1287 | if (ret) | |
1288 | goto out_region; | |
1289 | ||
ddfbf2af JD |
1290 | pdev = platform_device_register_simple("applesmc", APPLESMC_DATA_PORT, |
1291 | NULL, 0); | |
6f2fad74 NB |
1292 | if (IS_ERR(pdev)) { |
1293 | ret = PTR_ERR(pdev); | |
1294 | goto out_driver; | |
1295 | } | |
1296 | ||
5874583d HR |
1297 | /* create register cache */ |
1298 | ret = applesmc_init_smcreg(); | |
6996abf0 NB |
1299 | if (ret) |
1300 | goto out_device; | |
fa74419b | 1301 | |
0b0b5dff | 1302 | ret = applesmc_create_nodes(info_group, 1); |
5874583d HR |
1303 | if (ret) |
1304 | goto out_smcreg; | |
1305 | ||
3eba2bf7 HR |
1306 | ret = applesmc_create_nodes(fan_group, smcreg.fan_count); |
1307 | if (ret) | |
1308 | goto out_info; | |
6f2fad74 | 1309 | |
e30bca12 | 1310 | ret = applesmc_create_nodes(temp_group, smcreg.index_count); |
9792dadf HR |
1311 | if (ret) |
1312 | goto out_fans; | |
6f2fad74 | 1313 | |
0b0b5dff HR |
1314 | ret = applesmc_create_accelerometer(); |
1315 | if (ret) | |
1316 | goto out_temperature; | |
6f2fad74 | 1317 | |
0b0b5dff HR |
1318 | ret = applesmc_create_light_sensor(); |
1319 | if (ret) | |
1320 | goto out_accelerometer; | |
6f2fad74 | 1321 | |
0b0b5dff HR |
1322 | ret = applesmc_create_key_backlight(); |
1323 | if (ret) | |
1324 | goto out_light_sysfs; | |
6f2fad74 | 1325 | |
1beeffe4 TJ |
1326 | hwmon_dev = hwmon_device_register(&pdev->dev); |
1327 | if (IS_ERR(hwmon_dev)) { | |
1328 | ret = PTR_ERR(hwmon_dev); | |
6f2fad74 NB |
1329 | goto out_light_ledclass; |
1330 | } | |
1331 | ||
6f2fad74 NB |
1332 | return 0; |
1333 | ||
1334 | out_light_ledclass: | |
0b0b5dff | 1335 | applesmc_release_key_backlight(); |
6f2fad74 | 1336 | out_light_sysfs: |
0b0b5dff | 1337 | applesmc_release_light_sensor(); |
6f2fad74 | 1338 | out_accelerometer: |
0b0b5dff | 1339 | applesmc_release_accelerometer(); |
6f2fad74 | 1340 | out_temperature: |
9792dadf | 1341 | applesmc_destroy_nodes(temp_group); |
0559a538 | 1342 | out_fans: |
3eba2bf7 HR |
1343 | applesmc_destroy_nodes(fan_group); |
1344 | out_info: | |
0b0b5dff | 1345 | applesmc_destroy_nodes(info_group); |
5874583d HR |
1346 | out_smcreg: |
1347 | applesmc_destroy_smcreg(); | |
6f2fad74 NB |
1348 | out_device: |
1349 | platform_device_unregister(pdev); | |
1350 | out_driver: | |
1351 | platform_driver_unregister(&applesmc_driver); | |
1352 | out_region: | |
1353 | release_region(APPLESMC_DATA_PORT, APPLESMC_NR_PORTS); | |
1354 | out: | |
1ee7c71b | 1355 | pr_warn("driver init failed (ret=%d)!\n", ret); |
6f2fad74 NB |
1356 | return ret; |
1357 | } | |
1358 | ||
1359 | static void __exit applesmc_exit(void) | |
1360 | { | |
1beeffe4 | 1361 | hwmon_device_unregister(hwmon_dev); |
0b0b5dff HR |
1362 | applesmc_release_key_backlight(); |
1363 | applesmc_release_light_sensor(); | |
1364 | applesmc_release_accelerometer(); | |
9792dadf | 1365 | applesmc_destroy_nodes(temp_group); |
3eba2bf7 | 1366 | applesmc_destroy_nodes(fan_group); |
0b0b5dff | 1367 | applesmc_destroy_nodes(info_group); |
5874583d | 1368 | applesmc_destroy_smcreg(); |
6f2fad74 NB |
1369 | platform_device_unregister(pdev); |
1370 | platform_driver_unregister(&applesmc_driver); | |
1371 | release_region(APPLESMC_DATA_PORT, APPLESMC_NR_PORTS); | |
6f2fad74 NB |
1372 | } |
1373 | ||
1374 | module_init(applesmc_init); | |
1375 | module_exit(applesmc_exit); | |
1376 | ||
1377 | MODULE_AUTHOR("Nicolas Boichat"); | |
1378 | MODULE_DESCRIPTION("Apple SMC"); | |
1379 | MODULE_LICENSE("GPL v2"); | |
dc924efb | 1380 | MODULE_DEVICE_TABLE(dmi, applesmc_whitelist); |