blob: 0af63da6b603d05afb5feb23dcf02270905e3470 [file] [log] [blame]
Nicolas Boichat6f2fad72007-05-08 00:24:52 -07001/*
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>
Henrik Rydberg41e71f92010-11-09 15:15:11 +00007 * Copyright (C) 2010 Henrik Rydberg <rydberg@euromail.se>
Nicolas Boichat6f2fad72007-05-08 00:24:52 -07008 *
9 * Based on hdaps.c driver:
10 * Copyright (C) 2005 Robert Love <rml@novell.com>
Jesper Juhlaa8521e2012-06-20 21:18:48 +020011 * Copyright (C) 2005 Jesper Juhl <jj@chaosbits.net>
Nicolas Boichat6f2fad72007-05-08 00:24:52 -070012 *
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
Joe Perches1ee7c712010-11-09 15:15:03 +000030#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
31
Nicolas Boichat6f2fad72007-05-08 00:24:52 -070032#include <linux/delay.h>
33#include <linux/platform_device.h>
Dmitry Torokhovd5cf2b92007-09-26 00:01:35 -040034#include <linux/input-polldev.h>
Nicolas Boichat6f2fad72007-05-08 00:24:52 -070035#include <linux/kernel.h>
Henrik Rydberg58745832010-11-10 10:58:03 +000036#include <linux/slab.h>
Nicolas Boichat6f2fad72007-05-08 00:24:52 -070037#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>
H Hartley Sweeten6055fae2009-09-15 17:18:13 +020042#include <linux/io.h>
Nicolas Boichat6f2fad72007-05-08 00:24:52 -070043#include <linux/leds.h>
44#include <linux/hwmon.h>
45#include <linux/workqueue.h>
Jean Delvarefa845742012-10-10 15:25:56 +020046#include <linux/err.h>
Nicolas Boichat6f2fad72007-05-08 00:24:52 -070047
48/* data port used by Apple SMC */
49#define APPLESMC_DATA_PORT 0x300
50/* command/status port used by Apple SMC */
51#define APPLESMC_CMD_PORT 0x304
52
53#define APPLESMC_NR_PORTS 32 /* 0x300-0x31f */
54
55#define APPLESMC_MAX_DATA_LENGTH 32
56
Parag Warudkar521cf642012-09-17 17:49:55 +020057/* wait up to 128 ms for a status change. */
Henrik Rydberga332bf92012-07-09 12:10:26 +020058#define APPLESMC_MIN_WAIT 0x0010
Henrik Rydberg829917c2012-07-27 20:12:46 +020059#define APPLESMC_RETRY_WAIT 0x0100
Parag Warudkar521cf642012-09-17 17:49:55 +020060#define APPLESMC_MAX_WAIT 0x20000
Henrik Rydberg8c9398d2008-10-18 20:27:43 -070061
Nicolas Boichat6f2fad72007-05-08 00:24:52 -070062#define APPLESMC_READ_CMD 0x10
63#define APPLESMC_WRITE_CMD 0x11
64#define APPLESMC_GET_KEY_BY_INDEX_CMD 0x12
65#define APPLESMC_GET_KEY_TYPE_CMD 0x13
66
67#define KEY_COUNT_KEY "#KEY" /* r-o ui32 */
68
Henrik Rydberg8bd1a122008-10-18 20:27:39 -070069#define LIGHT_SENSOR_LEFT_KEY "ALV0" /* r-o {alv (6-10 bytes) */
70#define LIGHT_SENSOR_RIGHT_KEY "ALV1" /* r-o {alv (6-10 bytes) */
Dmitry Torokhovd5cf2b92007-09-26 00:01:35 -040071#define BACKLIGHT_KEY "LKSB" /* w-o {lkb (2 bytes) */
Nicolas Boichat6f2fad72007-05-08 00:24:52 -070072
Dmitry Torokhovd5cf2b92007-09-26 00:01:35 -040073#define CLAMSHELL_KEY "MSLD" /* r-o ui8 (unused) */
Nicolas Boichat6f2fad72007-05-08 00:24:52 -070074
75#define MOTION_SENSOR_X_KEY "MO_X" /* r-o sp78 (2 bytes) */
76#define MOTION_SENSOR_Y_KEY "MO_Y" /* r-o sp78 (2 bytes) */
77#define MOTION_SENSOR_Z_KEY "MO_Z" /* r-o sp78 (2 bytes) */
78#define MOTION_SENSOR_KEY "MOCN" /* r/w ui16 */
79
80#define FANS_COUNT "FNum" /* r-o ui8 */
81#define FANS_MANUAL "FS! " /* r-w ui16 */
Henrik Rydberg3eba2bf2010-11-09 15:15:08 +000082#define FAN_ID_FMT "F%dID" /* r-o char[16] */
Nicolas Boichat6f2fad72007-05-08 00:24:52 -070083
Henrik Rydbergb6e51222012-07-16 09:18:10 +020084#define TEMP_SENSOR_TYPE "sp78"
85
Nicolas Boichat6f2fad72007-05-08 00:24:52 -070086/* List of keys used to read/write fan speeds */
Henrik Rydberg3eba2bf2010-11-09 15:15:08 +000087static const char *const fan_speed_fmt[] = {
88 "F%dAc", /* actual speed */
89 "F%dMn", /* minimum speed (rw) */
90 "F%dMx", /* maximum speed */
91 "F%dSf", /* safe speed - not all models */
92 "F%dTg", /* target speed (manual: rw) */
Nicolas Boichat6f2fad72007-05-08 00:24:52 -070093};
94
95#define INIT_TIMEOUT_MSECS 5000 /* wait up to 5s for device init ... */
96#define INIT_WAIT_MSECS 50 /* ... in 50ms increments */
97
Dmitry Torokhovd5cf2b92007-09-26 00:01:35 -040098#define APPLESMC_POLL_INTERVAL 50 /* msecs */
Nicolas Boichat6f2fad72007-05-08 00:24:52 -070099#define APPLESMC_INPUT_FUZZ 4 /* input event threshold */
100#define APPLESMC_INPUT_FLAT 4
101
Henrik Rydberg3eba2bf2010-11-09 15:15:08 +0000102#define to_index(attr) (to_sensor_dev_attr(attr)->index & 0xffff)
103#define to_option(attr) (to_sensor_dev_attr(attr)->index >> 16)
Henrik Rydberg9792dad2010-11-10 10:58:04 +0000104
Henrik Rydberg9792dad2010-11-10 10:58:04 +0000105/* Dynamic device node attributes */
106struct applesmc_dev_attr {
107 struct sensor_device_attribute sda; /* hwmon attributes */
108 char name[32]; /* room for node file name */
109};
110
111/* Dynamic device node group */
112struct applesmc_node_group {
113 char *format; /* format string */
114 void *show; /* show function */
115 void *store; /* store function */
Henrik Rydberg3eba2bf2010-11-09 15:15:08 +0000116 int option; /* function argument */
Henrik Rydberg9792dad2010-11-10 10:58:04 +0000117 struct applesmc_dev_attr *nodes; /* dynamic node array */
118};
119
Henrik Rydberg58745832010-11-10 10:58:03 +0000120/* AppleSMC entry - cached register information */
121struct applesmc_entry {
122 char key[5]; /* four-letter key code */
123 u8 valid; /* set when entry is successfully read once */
124 u8 len; /* bounded by APPLESMC_MAX_DATA_LENGTH */
125 char type[5]; /* four-letter type code */
126 u8 flags; /* 0x10: func; 0x40: write; 0x80: read */
127};
128
129/* Register lookup and registers common to all SMCs */
130static struct applesmc_registers {
131 struct mutex mutex; /* register read/write mutex */
132 unsigned int key_count; /* number of SMC registers */
Henrik Rydberg3eba2bf2010-11-09 15:15:08 +0000133 unsigned int fan_count; /* number of fans */
Henrik Rydberg9792dad2010-11-10 10:58:04 +0000134 unsigned int temp_count; /* number of temperature registers */
135 unsigned int temp_begin; /* temperature lower index bound */
136 unsigned int temp_end; /* temperature upper index bound */
Henrik Rydberge30bca12012-07-16 09:18:11 +0200137 unsigned int index_count; /* size of temperature index array */
Henrik Rydberg40ef06f2010-11-10 10:58:05 +0000138 int num_light_sensors; /* number of light sensors */
139 bool has_accelerometer; /* has motion sensor */
140 bool has_key_backlight; /* has keyboard backlight */
Henrik Rydberg58745832010-11-10 10:58:03 +0000141 bool init_complete; /* true when fully initialized */
142 struct applesmc_entry *cache; /* cached key entries */
Henrik Rydberge30bca12012-07-16 09:18:11 +0200143 const char **index; /* temperature key index */
Henrik Rydberg58745832010-11-10 10:58:03 +0000144} smcreg = {
145 .mutex = __MUTEX_INITIALIZER(smcreg.mutex),
146};
147
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700148static const int debug;
149static struct platform_device *pdev;
150static s16 rest_x;
151static s16 rest_y;
Henrik Rydberga976f152009-09-21 17:04:50 -0700152static u8 backlight_state[2];
153
Tony Jones1beeffe2007-08-20 13:46:20 -0700154static struct device *hwmon_dev;
Dmitry Torokhovd5cf2b92007-09-26 00:01:35 -0400155static struct input_polled_dev *applesmc_idev;
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700156
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700157/*
158 * Last index written to key_at_index sysfs file, and value to use for all other
159 * key_at_index_* sysfs files.
160 */
161static unsigned int key_at_index;
162
163static struct workqueue_struct *applesmc_led_wq;
164
165/*
Henrik Rydberg829917c2012-07-27 20:12:46 +0200166 * wait_read - Wait for a byte to appear on SMC port. Callers must
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700167 * hold applesmc_lock.
168 */
Henrik Rydberg829917c2012-07-27 20:12:46 +0200169static int wait_read(void)
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700170{
Henrik Rydberg829917c2012-07-27 20:12:46 +0200171 u8 status;
Henrik Rydberg8c9398d2008-10-18 20:27:43 -0700172 int us;
Henrik Rydberg8c9398d2008-10-18 20:27:43 -0700173 for (us = APPLESMC_MIN_WAIT; us < APPLESMC_MAX_WAIT; us <<= 1) {
174 udelay(us);
Henrik Rydberg829917c2012-07-27 20:12:46 +0200175 status = inb(APPLESMC_CMD_PORT);
176 /* read: wait for smc to settle */
177 if (status & 0x01)
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700178 return 0;
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700179 }
180
Henrik Rydberg829917c2012-07-27 20:12:46 +0200181 pr_warn("wait_read() fail: 0x%02x\n", status);
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700182 return -EIO;
183}
184
185/*
Henrik Rydberg829917c2012-07-27 20:12:46 +0200186 * send_byte - Write to SMC port, retrying when necessary. Callers
187 * must hold applesmc_lock.
Henrik Rydberg84d2d7f2008-10-18 20:27:38 -0700188 */
Henrik Rydberg829917c2012-07-27 20:12:46 +0200189static int send_byte(u8 cmd, u16 port)
190{
191 u8 status;
192 int us;
193
194 outb(cmd, port);
195 for (us = APPLESMC_MIN_WAIT; us < APPLESMC_MAX_WAIT; us <<= 1) {
196 udelay(us);
197 status = inb(APPLESMC_CMD_PORT);
198 /* write: wait for smc to settle */
199 if (status & 0x02)
200 continue;
201 /* ready: cmd accepted, return */
202 if (status & 0x04)
203 return 0;
204 /* timeout: give up */
205 if (us << 1 == APPLESMC_MAX_WAIT)
206 break;
207 /* busy: long wait and resend */
208 udelay(APPLESMC_RETRY_WAIT);
209 outb(cmd, port);
210 }
211
212 pr_warn("send_byte(0x%02x, 0x%04x) fail: 0x%02x\n", cmd, port, status);
213 return -EIO;
214}
215
Henrik Rydberg84d2d7f2008-10-18 20:27:38 -0700216static int send_command(u8 cmd)
217{
Henrik Rydberg829917c2012-07-27 20:12:46 +0200218 return send_byte(cmd, APPLESMC_CMD_PORT);
Henrik Rydberg84d2d7f2008-10-18 20:27:38 -0700219}
220
Henrik Rydberg58745832010-11-10 10:58:03 +0000221static int send_argument(const char *key)
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700222{
223 int i;
224
Henrik Rydberg829917c2012-07-27 20:12:46 +0200225 for (i = 0; i < 4; i++)
226 if (send_byte(key[i], APPLESMC_DATA_PORT))
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700227 return -EIO;
Henrik Rydberg58745832010-11-10 10:58:03 +0000228 return 0;
229}
230
231static int read_smc(u8 cmd, const char *key, u8 *buffer, u8 len)
232{
Henrik Rydberg25f2bd72013-10-02 19:15:03 +0200233 u8 status, data = 0;
Henrik Rydberg58745832010-11-10 10:58:03 +0000234 int i;
235
236 if (send_command(cmd) || send_argument(key)) {
Henrik Rydbergac852ed2012-06-07 04:54:29 -0400237 pr_warn("%.4s: read arg fail\n", key);
Henrik Rydberg58745832010-11-10 10:58:03 +0000238 return -EIO;
239 }
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700240
Henrik Rydberg25f2bd72013-10-02 19:15:03 +0200241 /* This has no effect on newer (2012) SMCs */
Henrik Rydberg829917c2012-07-27 20:12:46 +0200242 if (send_byte(len, APPLESMC_DATA_PORT)) {
243 pr_warn("%.4s: read len fail\n", key);
244 return -EIO;
245 }
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700246
247 for (i = 0; i < len; i++) {
Henrik Rydberg829917c2012-07-27 20:12:46 +0200248 if (wait_read()) {
249 pr_warn("%.4s: read data[%d] fail\n", key, i);
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700250 return -EIO;
Henrik Rydberg58745832010-11-10 10:58:03 +0000251 }
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700252 buffer[i] = inb(APPLESMC_DATA_PORT);
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700253 }
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700254
Henrik Rydberg25f2bd72013-10-02 19:15:03 +0200255 /* Read the data port until bit0 is cleared */
256 for (i = 0; i < 16; i++) {
257 udelay(APPLESMC_MIN_WAIT);
258 status = inb(APPLESMC_CMD_PORT);
259 if (!(status & 0x01))
260 break;
261 data = inb(APPLESMC_DATA_PORT);
262 }
263 if (i)
264 pr_warn("flushed %d bytes, last value is: %d\n", i, data);
265
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700266 return 0;
267}
268
Henrik Rydberg58745832010-11-10 10:58:03 +0000269static int write_smc(u8 cmd, const char *key, const u8 *buffer, u8 len)
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700270{
271 int i;
272
Henrik Rydberg58745832010-11-10 10:58:03 +0000273 if (send_command(cmd) || send_argument(key)) {
274 pr_warn("%s: write arg fail\n", key);
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700275 return -EIO;
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700276 }
277
Henrik Rydberg829917c2012-07-27 20:12:46 +0200278 if (send_byte(len, APPLESMC_DATA_PORT)) {
279 pr_warn("%.4s: write len fail\n", key);
280 return -EIO;
281 }
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700282
283 for (i = 0; i < len; i++) {
Henrik Rydberg829917c2012-07-27 20:12:46 +0200284 if (send_byte(buffer[i], APPLESMC_DATA_PORT)) {
Henrik Rydberg58745832010-11-10 10:58:03 +0000285 pr_warn("%s: write data fail\n", key);
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700286 return -EIO;
Henrik Rydberg58745832010-11-10 10:58:03 +0000287 }
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700288 }
289
290 return 0;
291}
292
Henrik Rydberg58745832010-11-10 10:58:03 +0000293static int read_register_count(unsigned int *count)
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700294{
Henrik Rydberg58745832010-11-10 10:58:03 +0000295 __be32 be;
296 int ret;
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700297
Henrik Rydberg58745832010-11-10 10:58:03 +0000298 ret = read_smc(APPLESMC_READ_CMD, KEY_COUNT_KEY, (u8 *)&be, 4);
299 if (ret)
300 return ret;
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700301
Henrik Rydberg58745832010-11-10 10:58:03 +0000302 *count = be32_to_cpu(be);
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700303 return 0;
304}
305
306/*
Henrik Rydberg58745832010-11-10 10:58:03 +0000307 * Serialized I/O
308 *
309 * Returns zero on success or a negative error on failure.
310 * All functions below are concurrency safe - callers should NOT hold lock.
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700311 */
Henrik Rydberg58745832010-11-10 10:58:03 +0000312
313static int applesmc_read_entry(const struct applesmc_entry *entry,
314 u8 *buf, u8 len)
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700315{
Henrik Rydberg58745832010-11-10 10:58:03 +0000316 int ret;
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700317
Henrik Rydberg58745832010-11-10 10:58:03 +0000318 if (entry->len != len)
319 return -EINVAL;
320 mutex_lock(&smcreg.mutex);
321 ret = read_smc(APPLESMC_READ_CMD, entry->key, buf, len);
322 mutex_unlock(&smcreg.mutex);
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700323
Henrik Rydberg58745832010-11-10 10:58:03 +0000324 return ret;
325}
326
327static int applesmc_write_entry(const struct applesmc_entry *entry,
328 const u8 *buf, u8 len)
329{
330 int ret;
331
332 if (entry->len != len)
333 return -EINVAL;
334 mutex_lock(&smcreg.mutex);
335 ret = write_smc(APPLESMC_WRITE_CMD, entry->key, buf, len);
336 mutex_unlock(&smcreg.mutex);
337 return ret;
338}
339
340static const struct applesmc_entry *applesmc_get_entry_by_index(int index)
341{
342 struct applesmc_entry *cache = &smcreg.cache[index];
343 u8 key[4], info[6];
344 __be32 be;
345 int ret = 0;
346
347 if (cache->valid)
348 return cache;
349
350 mutex_lock(&smcreg.mutex);
351
352 if (cache->valid)
353 goto out;
354 be = cpu_to_be32(index);
355 ret = read_smc(APPLESMC_GET_KEY_BY_INDEX_CMD, (u8 *)&be, key, 4);
356 if (ret)
357 goto out;
358 ret = read_smc(APPLESMC_GET_KEY_TYPE_CMD, key, info, 6);
359 if (ret)
360 goto out;
361
362 memcpy(cache->key, key, 4);
363 cache->len = info[0];
364 memcpy(cache->type, &info[1], 4);
365 cache->flags = info[5];
366 cache->valid = 1;
367
368out:
369 mutex_unlock(&smcreg.mutex);
370 if (ret)
371 return ERR_PTR(ret);
372 return cache;
373}
374
375static int applesmc_get_lower_bound(unsigned int *lo, const char *key)
376{
377 int begin = 0, end = smcreg.key_count;
378 const struct applesmc_entry *entry;
379
380 while (begin != end) {
381 int middle = begin + (end - begin) / 2;
382 entry = applesmc_get_entry_by_index(middle);
Henrik Rydberg0fc86ec2012-01-26 06:08:41 -0500383 if (IS_ERR(entry)) {
384 *lo = 0;
Henrik Rydberg58745832010-11-10 10:58:03 +0000385 return PTR_ERR(entry);
Henrik Rydberg0fc86ec2012-01-26 06:08:41 -0500386 }
Henrik Rydberg58745832010-11-10 10:58:03 +0000387 if (strcmp(entry->key, key) < 0)
388 begin = middle + 1;
389 else
390 end = middle;
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700391 }
392
Henrik Rydberg58745832010-11-10 10:58:03 +0000393 *lo = begin;
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700394 return 0;
395}
396
Henrik Rydberg58745832010-11-10 10:58:03 +0000397static int applesmc_get_upper_bound(unsigned int *hi, const char *key)
398{
399 int begin = 0, end = smcreg.key_count;
400 const struct applesmc_entry *entry;
401
402 while (begin != end) {
403 int middle = begin + (end - begin) / 2;
404 entry = applesmc_get_entry_by_index(middle);
Henrik Rydberg0fc86ec2012-01-26 06:08:41 -0500405 if (IS_ERR(entry)) {
406 *hi = smcreg.key_count;
Henrik Rydberg58745832010-11-10 10:58:03 +0000407 return PTR_ERR(entry);
Henrik Rydberg0fc86ec2012-01-26 06:08:41 -0500408 }
Henrik Rydberg58745832010-11-10 10:58:03 +0000409 if (strcmp(key, entry->key) < 0)
410 end = middle;
411 else
412 begin = middle + 1;
413 }
414
415 *hi = begin;
416 return 0;
417}
418
419static const struct applesmc_entry *applesmc_get_entry_by_key(const char *key)
420{
421 int begin, end;
422 int ret;
423
424 ret = applesmc_get_lower_bound(&begin, key);
425 if (ret)
426 return ERR_PTR(ret);
427 ret = applesmc_get_upper_bound(&end, key);
428 if (ret)
429 return ERR_PTR(ret);
430 if (end - begin != 1)
431 return ERR_PTR(-EINVAL);
432
433 return applesmc_get_entry_by_index(begin);
434}
435
436static int applesmc_read_key(const char *key, u8 *buffer, u8 len)
437{
438 const struct applesmc_entry *entry;
439
440 entry = applesmc_get_entry_by_key(key);
441 if (IS_ERR(entry))
442 return PTR_ERR(entry);
443
444 return applesmc_read_entry(entry, buffer, len);
445}
446
447static int applesmc_write_key(const char *key, const u8 *buffer, u8 len)
448{
449 const struct applesmc_entry *entry;
450
451 entry = applesmc_get_entry_by_key(key);
452 if (IS_ERR(entry))
453 return PTR_ERR(entry);
454
455 return applesmc_write_entry(entry, buffer, len);
456}
457
Henrik Rydberg40ef06f2010-11-10 10:58:05 +0000458static int applesmc_has_key(const char *key, bool *value)
459{
460 const struct applesmc_entry *entry;
461
462 entry = applesmc_get_entry_by_key(key);
463 if (IS_ERR(entry) && PTR_ERR(entry) != -EINVAL)
464 return PTR_ERR(entry);
465
466 *value = !IS_ERR(entry);
467 return 0;
468}
469
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700470/*
Henrik Rydbergedf48f32012-06-20 18:00:06 +0200471 * applesmc_read_s16 - Read 16-bit signed big endian register
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700472 */
Henrik Rydbergedf48f32012-06-20 18:00:06 +0200473static int applesmc_read_s16(const char *key, s16 *value)
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700474{
475 u8 buffer[2];
476 int ret;
477
Henrik Rydbergedf48f32012-06-20 18:00:06 +0200478 ret = applesmc_read_key(key, buffer, 2);
479 if (ret)
480 return ret;
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700481
482 *value = ((s16)buffer[0] << 8) | buffer[1];
Henrik Rydbergedf48f32012-06-20 18:00:06 +0200483 return 0;
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700484}
485
486/*
Henrik Rydberg2344cd02010-11-09 15:15:02 +0000487 * applesmc_device_init - initialize the accelerometer. Can sleep.
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700488 */
Henrik Rydberg2344cd02010-11-09 15:15:02 +0000489static void applesmc_device_init(void)
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700490{
Henrik Rydberg2344cd02010-11-09 15:15:02 +0000491 int total;
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700492 u8 buffer[2];
493
Henrik Rydberg40ef06f2010-11-10 10:58:05 +0000494 if (!smcreg.has_accelerometer)
Henrik Rydberg2344cd02010-11-09 15:15:02 +0000495 return;
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700496
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700497 for (total = INIT_TIMEOUT_MSECS; total > 0; total -= INIT_WAIT_MSECS) {
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700498 if (!applesmc_read_key(MOTION_SENSOR_KEY, buffer, 2) &&
Henrik Rydberg2344cd02010-11-09 15:15:02 +0000499 (buffer[0] != 0x00 || buffer[1] != 0x00))
Henrik Rydberg58745832010-11-10 10:58:03 +0000500 return;
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700501 buffer[0] = 0xe0;
502 buffer[1] = 0x00;
503 applesmc_write_key(MOTION_SENSOR_KEY, buffer, 2);
504 msleep(INIT_WAIT_MSECS);
505 }
506
Joe Perches1ee7c712010-11-09 15:15:03 +0000507 pr_warn("failed to init the device\n");
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700508}
509
Henrik Rydberge30bca12012-07-16 09:18:11 +0200510static int applesmc_init_index(struct applesmc_registers *s)
511{
512 const struct applesmc_entry *entry;
513 unsigned int i;
514
515 if (s->index)
516 return 0;
517
518 s->index = kcalloc(s->temp_count, sizeof(s->index[0]), GFP_KERNEL);
519 if (!s->index)
520 return -ENOMEM;
521
522 for (i = s->temp_begin; i < s->temp_end; i++) {
523 entry = applesmc_get_entry_by_index(i);
524 if (IS_ERR(entry))
525 continue;
526 if (strcmp(entry->type, TEMP_SENSOR_TYPE))
527 continue;
528 s->index[s->index_count++] = entry->key;
529 }
530
531 return 0;
532}
533
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700534/*
Henrik Rydberg58745832010-11-10 10:58:03 +0000535 * applesmc_init_smcreg_try - Try to initialize register cache. Idempotent.
536 */
537static int applesmc_init_smcreg_try(void)
538{
539 struct applesmc_registers *s = &smcreg;
Henrik Rydberg40ef06f2010-11-10 10:58:05 +0000540 bool left_light_sensor, right_light_sensor;
Henrik Rydberg5f451382013-09-26 08:33:16 +0200541 unsigned int count;
Henrik Rydberg3eba2bf2010-11-09 15:15:08 +0000542 u8 tmp[1];
Henrik Rydberg58745832010-11-10 10:58:03 +0000543 int ret;
544
545 if (s->init_complete)
546 return 0;
547
Henrik Rydberg5f451382013-09-26 08:33:16 +0200548 ret = read_register_count(&count);
Henrik Rydberg58745832010-11-10 10:58:03 +0000549 if (ret)
550 return ret;
551
Henrik Rydberg5f451382013-09-26 08:33:16 +0200552 if (s->cache && s->key_count != count) {
553 pr_warn("key count changed from %d to %d\n",
554 s->key_count, count);
555 kfree(s->cache);
556 s->cache = NULL;
557 }
558 s->key_count = count;
559
Henrik Rydberg58745832010-11-10 10:58:03 +0000560 if (!s->cache)
561 s->cache = kcalloc(s->key_count, sizeof(*s->cache), GFP_KERNEL);
562 if (!s->cache)
563 return -ENOMEM;
564
Henrik Rydberg3eba2bf2010-11-09 15:15:08 +0000565 ret = applesmc_read_key(FANS_COUNT, tmp, 1);
566 if (ret)
567 return ret;
568 s->fan_count = tmp[0];
569
Henrik Rydberg9792dad2010-11-10 10:58:04 +0000570 ret = applesmc_get_lower_bound(&s->temp_begin, "T");
571 if (ret)
572 return ret;
573 ret = applesmc_get_lower_bound(&s->temp_end, "U");
574 if (ret)
575 return ret;
576 s->temp_count = s->temp_end - s->temp_begin;
577
Henrik Rydberge30bca12012-07-16 09:18:11 +0200578 ret = applesmc_init_index(s);
579 if (ret)
580 return ret;
581
Henrik Rydberg40ef06f2010-11-10 10:58:05 +0000582 ret = applesmc_has_key(LIGHT_SENSOR_LEFT_KEY, &left_light_sensor);
583 if (ret)
584 return ret;
585 ret = applesmc_has_key(LIGHT_SENSOR_RIGHT_KEY, &right_light_sensor);
586 if (ret)
587 return ret;
588 ret = applesmc_has_key(MOTION_SENSOR_KEY, &s->has_accelerometer);
589 if (ret)
590 return ret;
591 ret = applesmc_has_key(BACKLIGHT_KEY, &s->has_key_backlight);
592 if (ret)
593 return ret;
594
595 s->num_light_sensors = left_light_sensor + right_light_sensor;
Henrik Rydberg58745832010-11-10 10:58:03 +0000596 s->init_complete = true;
597
Henrik Rydberge30bca12012-07-16 09:18:11 +0200598 pr_info("key=%d fan=%d temp=%d index=%d acc=%d lux=%d kbd=%d\n",
599 s->key_count, s->fan_count, s->temp_count, s->index_count,
Henrik Rydberg40ef06f2010-11-10 10:58:05 +0000600 s->has_accelerometer,
601 s->num_light_sensors,
602 s->has_key_backlight);
Henrik Rydberg58745832010-11-10 10:58:03 +0000603
604 return 0;
605}
606
Henrik Rydberge30bca12012-07-16 09:18:11 +0200607static void applesmc_destroy_smcreg(void)
608{
609 kfree(smcreg.index);
610 smcreg.index = NULL;
611 kfree(smcreg.cache);
612 smcreg.cache = NULL;
613 smcreg.init_complete = false;
614}
615
Henrik Rydberg58745832010-11-10 10:58:03 +0000616/*
617 * applesmc_init_smcreg - Initialize register cache.
618 *
619 * Retries until initialization is successful, or the operation times out.
620 *
621 */
622static int applesmc_init_smcreg(void)
623{
624 int ms, ret;
625
626 for (ms = 0; ms < INIT_TIMEOUT_MSECS; ms += INIT_WAIT_MSECS) {
627 ret = applesmc_init_smcreg_try();
628 if (!ret) {
629 if (ms)
630 pr_info("init_smcreg() took %d ms\n", ms);
631 return 0;
632 }
633 msleep(INIT_WAIT_MSECS);
634 }
635
Henrik Rydberge30bca12012-07-16 09:18:11 +0200636 applesmc_destroy_smcreg();
Henrik Rydberg58745832010-11-10 10:58:03 +0000637
638 return ret;
639}
640
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700641/* Device model stuff */
642static int applesmc_probe(struct platform_device *dev)
643{
Henrik Rydberg58745832010-11-10 10:58:03 +0000644 int ret;
645
646 ret = applesmc_init_smcreg();
647 if (ret)
648 return ret;
649
Henrik Rydberg2344cd02010-11-09 15:15:02 +0000650 applesmc_device_init();
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700651
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700652 return 0;
653}
654
Henrik Rydberga976f152009-09-21 17:04:50 -0700655/* Synchronize device with memorized backlight state */
656static int applesmc_pm_resume(struct device *dev)
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700657{
Henrik Rydberg40ef06f2010-11-10 10:58:05 +0000658 if (smcreg.has_key_backlight)
Henrik Rydberga976f152009-09-21 17:04:50 -0700659 applesmc_write_key(BACKLIGHT_KEY, backlight_state, 2);
Henrik Rydberga976f152009-09-21 17:04:50 -0700660 return 0;
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700661}
662
Henrik Rydberga976f152009-09-21 17:04:50 -0700663/* Reinitialize device on resume from hibernation */
664static int applesmc_pm_restore(struct device *dev)
665{
Henrik Rydberg2344cd02010-11-09 15:15:02 +0000666 applesmc_device_init();
Henrik Rydberga976f152009-09-21 17:04:50 -0700667 return applesmc_pm_resume(dev);
668}
669
Alexey Dobriyan47145212009-12-14 18:00:08 -0800670static const struct dev_pm_ops applesmc_pm_ops = {
Henrik Rydberga976f152009-09-21 17:04:50 -0700671 .resume = applesmc_pm_resume,
672 .restore = applesmc_pm_restore,
673};
674
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700675static struct platform_driver applesmc_driver = {
676 .probe = applesmc_probe,
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700677 .driver = {
678 .name = "applesmc",
Henrik Rydberga976f152009-09-21 17:04:50 -0700679 .pm = &applesmc_pm_ops,
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700680 },
681};
682
683/*
684 * applesmc_calibrate - Set our "resting" values. Callers must
685 * hold applesmc_lock.
686 */
687static void applesmc_calibrate(void)
688{
Henrik Rydbergedf48f32012-06-20 18:00:06 +0200689 applesmc_read_s16(MOTION_SENSOR_X_KEY, &rest_x);
690 applesmc_read_s16(MOTION_SENSOR_Y_KEY, &rest_y);
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700691 rest_x = -rest_x;
692}
693
Dmitry Torokhovd5cf2b92007-09-26 00:01:35 -0400694static void applesmc_idev_poll(struct input_polled_dev *dev)
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700695{
Dmitry Torokhovd5cf2b92007-09-26 00:01:35 -0400696 struct input_dev *idev = dev->input;
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700697 s16 x, y;
698
Henrik Rydbergedf48f32012-06-20 18:00:06 +0200699 if (applesmc_read_s16(MOTION_SENSOR_X_KEY, &x))
Henrik Rydberg58745832010-11-10 10:58:03 +0000700 return;
Henrik Rydbergedf48f32012-06-20 18:00:06 +0200701 if (applesmc_read_s16(MOTION_SENSOR_Y_KEY, &y))
Henrik Rydberg58745832010-11-10 10:58:03 +0000702 return;
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700703
704 x = -x;
Dmitry Torokhovd5cf2b92007-09-26 00:01:35 -0400705 input_report_abs(idev, ABS_X, x - rest_x);
706 input_report_abs(idev, ABS_Y, y - rest_y);
707 input_sync(idev);
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700708}
709
710/* Sysfs Files */
711
Nicolas Boichatfa744192007-05-23 13:58:13 -0700712static ssize_t applesmc_name_show(struct device *dev,
713 struct device_attribute *attr, char *buf)
714{
715 return snprintf(buf, PAGE_SIZE, "applesmc\n");
716}
717
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700718static ssize_t applesmc_position_show(struct device *dev,
719 struct device_attribute *attr, char *buf)
720{
721 int ret;
722 s16 x, y, z;
723
Henrik Rydbergedf48f32012-06-20 18:00:06 +0200724 ret = applesmc_read_s16(MOTION_SENSOR_X_KEY, &x);
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700725 if (ret)
726 goto out;
Henrik Rydbergedf48f32012-06-20 18:00:06 +0200727 ret = applesmc_read_s16(MOTION_SENSOR_Y_KEY, &y);
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700728 if (ret)
729 goto out;
Henrik Rydbergedf48f32012-06-20 18:00:06 +0200730 ret = applesmc_read_s16(MOTION_SENSOR_Z_KEY, &z);
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700731 if (ret)
732 goto out;
733
734out:
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700735 if (ret)
736 return ret;
737 else
738 return snprintf(buf, PAGE_SIZE, "(%d,%d,%d)\n", x, y, z);
739}
740
741static ssize_t applesmc_light_show(struct device *dev,
742 struct device_attribute *attr, char *sysfsbuf)
743{
Henrik Rydberg58745832010-11-10 10:58:03 +0000744 const struct applesmc_entry *entry;
Henrik Rydberg8bd1a122008-10-18 20:27:39 -0700745 static int data_length;
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700746 int ret;
747 u8 left = 0, right = 0;
Henrik Rydberg58745832010-11-10 10:58:03 +0000748 u8 buffer[10];
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700749
Henrik Rydberg8bd1a122008-10-18 20:27:39 -0700750 if (!data_length) {
Henrik Rydberg58745832010-11-10 10:58:03 +0000751 entry = applesmc_get_entry_by_key(LIGHT_SENSOR_LEFT_KEY);
752 if (IS_ERR(entry))
753 return PTR_ERR(entry);
754 if (entry->len > 10)
755 return -ENXIO;
756 data_length = entry->len;
Joe Perches1ee7c712010-11-09 15:15:03 +0000757 pr_info("light sensor data length set to %d\n", data_length);
Henrik Rydberg8bd1a122008-10-18 20:27:39 -0700758 }
759
760 ret = applesmc_read_key(LIGHT_SENSOR_LEFT_KEY, buffer, data_length);
Alex Murrayc3d63622009-01-15 13:51:08 -0800761 /* newer macbooks report a single 10-bit bigendian value */
762 if (data_length == 10) {
763 left = be16_to_cpu(*(__be16 *)(buffer + 6)) >> 2;
764 goto out;
765 }
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700766 left = buffer[2];
767 if (ret)
768 goto out;
Henrik Rydberg8bd1a122008-10-18 20:27:39 -0700769 ret = applesmc_read_key(LIGHT_SENSOR_RIGHT_KEY, buffer, data_length);
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700770 right = buffer[2];
771
772out:
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700773 if (ret)
774 return ret;
775 else
776 return snprintf(sysfsbuf, PAGE_SIZE, "(%d,%d)\n", left, right);
777}
778
Alex Murrayfa5575c2010-05-27 19:58:54 +0200779/* Displays sensor key as label */
780static ssize_t applesmc_show_sensor_label(struct device *dev,
781 struct device_attribute *devattr, char *sysfsbuf)
782{
Henrik Rydberge30bca12012-07-16 09:18:11 +0200783 const char *key = smcreg.index[to_index(devattr)];
Alex Murrayfa5575c2010-05-27 19:58:54 +0200784
Henrik Rydberge30bca12012-07-16 09:18:11 +0200785 return snprintf(sysfsbuf, PAGE_SIZE, "%s\n", key);
Alex Murrayfa5575c2010-05-27 19:58:54 +0200786}
787
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700788/* Displays degree Celsius * 1000 */
789static ssize_t applesmc_show_temperature(struct device *dev,
790 struct device_attribute *devattr, char *sysfsbuf)
791{
Henrik Rydberge30bca12012-07-16 09:18:11 +0200792 const char *key = smcreg.index[to_index(devattr)];
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700793 int ret;
Henrik Rydbergb6e51222012-07-16 09:18:10 +0200794 s16 value;
795 int temp;
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700796
Henrik Rydberge30bca12012-07-16 09:18:11 +0200797 ret = applesmc_read_s16(key, &value);
Henrik Rydberg9792dad2010-11-10 10:58:04 +0000798 if (ret)
799 return ret;
800
Henrik Rydbergb6e51222012-07-16 09:18:10 +0200801 temp = 250 * (value >> 6);
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700802
Henrik Rydbergb6e51222012-07-16 09:18:10 +0200803 return snprintf(sysfsbuf, PAGE_SIZE, "%d\n", temp);
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700804}
805
806static ssize_t applesmc_show_fan_speed(struct device *dev,
807 struct device_attribute *attr, char *sysfsbuf)
808{
809 int ret;
810 unsigned int speed = 0;
811 char newkey[5];
812 u8 buffer[2];
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700813
Henrik Rydberg3eba2bf2010-11-09 15:15:08 +0000814 sprintf(newkey, fan_speed_fmt[to_option(attr)], to_index(attr));
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700815
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700816 ret = applesmc_read_key(newkey, buffer, 2);
817 speed = ((buffer[0] << 8 | buffer[1]) >> 2);
818
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700819 if (ret)
820 return ret;
821 else
822 return snprintf(sysfsbuf, PAGE_SIZE, "%u\n", speed);
823}
824
825static ssize_t applesmc_store_fan_speed(struct device *dev,
826 struct device_attribute *attr,
827 const char *sysfsbuf, size_t count)
828{
829 int ret;
Guenter Roeck2bfe8142010-11-10 10:42:21 -0800830 unsigned long speed;
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700831 char newkey[5];
832 u8 buffer[2];
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700833
Frans Meulenbroeks179c4fd2012-01-04 20:58:52 +0100834 if (kstrtoul(sysfsbuf, 10, &speed) < 0 || speed >= 0x4000)
Guenter Roeck2bfe8142010-11-10 10:42:21 -0800835 return -EINVAL; /* Bigger than a 14-bit value */
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700836
Henrik Rydberg3eba2bf2010-11-09 15:15:08 +0000837 sprintf(newkey, fan_speed_fmt[to_option(attr)], to_index(attr));
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700838
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700839 buffer[0] = (speed >> 6) & 0xff;
840 buffer[1] = (speed << 2) & 0xff;
841 ret = applesmc_write_key(newkey, buffer, 2);
842
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700843 if (ret)
844 return ret;
845 else
846 return count;
847}
848
849static ssize_t applesmc_show_fan_manual(struct device *dev,
Henrik Rydberg3eba2bf2010-11-09 15:15:08 +0000850 struct device_attribute *attr, char *sysfsbuf)
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700851{
852 int ret;
853 u16 manual = 0;
854 u8 buffer[2];
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700855
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700856 ret = applesmc_read_key(FANS_MANUAL, buffer, 2);
Henrik Rydberg3eba2bf2010-11-09 15:15:08 +0000857 manual = ((buffer[0] << 8 | buffer[1]) >> to_index(attr)) & 0x01;
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700858
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700859 if (ret)
860 return ret;
861 else
862 return snprintf(sysfsbuf, PAGE_SIZE, "%d\n", manual);
863}
864
865static ssize_t applesmc_store_fan_manual(struct device *dev,
Henrik Rydberg3eba2bf2010-11-09 15:15:08 +0000866 struct device_attribute *attr,
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700867 const char *sysfsbuf, size_t count)
868{
869 int ret;
870 u8 buffer[2];
Guenter Roeck2bfe8142010-11-10 10:42:21 -0800871 unsigned long input;
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700872 u16 val;
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700873
Frans Meulenbroeks179c4fd2012-01-04 20:58:52 +0100874 if (kstrtoul(sysfsbuf, 10, &input) < 0)
Guenter Roeck2bfe8142010-11-10 10:42:21 -0800875 return -EINVAL;
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700876
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700877 ret = applesmc_read_key(FANS_MANUAL, buffer, 2);
878 val = (buffer[0] << 8 | buffer[1]);
879 if (ret)
880 goto out;
881
882 if (input)
Henrik Rydberg3eba2bf2010-11-09 15:15:08 +0000883 val = val | (0x01 << to_index(attr));
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700884 else
Henrik Rydberg3eba2bf2010-11-09 15:15:08 +0000885 val = val & ~(0x01 << to_index(attr));
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700886
887 buffer[0] = (val >> 8) & 0xFF;
888 buffer[1] = val & 0xFF;
889
890 ret = applesmc_write_key(FANS_MANUAL, buffer, 2);
891
892out:
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700893 if (ret)
894 return ret;
895 else
896 return count;
897}
898
899static ssize_t applesmc_show_fan_position(struct device *dev,
900 struct device_attribute *attr, char *sysfsbuf)
901{
902 int ret;
903 char newkey[5];
904 u8 buffer[17];
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700905
Henrik Rydberg3eba2bf2010-11-09 15:15:08 +0000906 sprintf(newkey, FAN_ID_FMT, to_index(attr));
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700907
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700908 ret = applesmc_read_key(newkey, buffer, 16);
909 buffer[16] = 0;
910
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700911 if (ret)
912 return ret;
913 else
914 return snprintf(sysfsbuf, PAGE_SIZE, "%s\n", buffer+4);
915}
916
917static ssize_t applesmc_calibrate_show(struct device *dev,
918 struct device_attribute *attr, char *sysfsbuf)
919{
920 return snprintf(sysfsbuf, PAGE_SIZE, "(%d,%d)\n", rest_x, rest_y);
921}
922
923static ssize_t applesmc_calibrate_store(struct device *dev,
924 struct device_attribute *attr, const char *sysfsbuf, size_t count)
925{
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700926 applesmc_calibrate();
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700927
928 return count;
929}
930
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700931static void applesmc_backlight_set(struct work_struct *work)
932{
Henrik Rydberga976f152009-09-21 17:04:50 -0700933 applesmc_write_key(BACKLIGHT_KEY, backlight_state, 2);
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700934}
935static DECLARE_WORK(backlight_work, &applesmc_backlight_set);
936
937static void applesmc_brightness_set(struct led_classdev *led_cdev,
938 enum led_brightness value)
939{
940 int ret;
941
Henrik Rydberga976f152009-09-21 17:04:50 -0700942 backlight_state[0] = value;
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700943 ret = queue_work(applesmc_led_wq, &backlight_work);
944
945 if (debug && (!ret))
Guenter Roeck692fe502013-01-10 05:49:55 -0800946 dev_dbg(led_cdev->dev, "work was already on the queue.\n");
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700947}
948
949static ssize_t applesmc_key_count_show(struct device *dev,
950 struct device_attribute *attr, char *sysfsbuf)
951{
952 int ret;
953 u8 buffer[4];
954 u32 count;
955
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700956 ret = applesmc_read_key(KEY_COUNT_KEY, buffer, 4);
957 count = ((u32)buffer[0]<<24) + ((u32)buffer[1]<<16) +
958 ((u32)buffer[2]<<8) + buffer[3];
959
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700960 if (ret)
961 return ret;
962 else
963 return snprintf(sysfsbuf, PAGE_SIZE, "%d\n", count);
964}
965
966static ssize_t applesmc_key_at_index_read_show(struct device *dev,
967 struct device_attribute *attr, char *sysfsbuf)
968{
Henrik Rydberg58745832010-11-10 10:58:03 +0000969 const struct applesmc_entry *entry;
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700970 int ret;
971
Henrik Rydberg58745832010-11-10 10:58:03 +0000972 entry = applesmc_get_entry_by_index(key_at_index);
973 if (IS_ERR(entry))
974 return PTR_ERR(entry);
975 ret = applesmc_read_entry(entry, sysfsbuf, entry->len);
976 if (ret)
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700977 return ret;
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700978
Henrik Rydberg58745832010-11-10 10:58:03 +0000979 return entry->len;
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700980}
981
982static ssize_t applesmc_key_at_index_data_length_show(struct device *dev,
983 struct device_attribute *attr, char *sysfsbuf)
984{
Henrik Rydberg58745832010-11-10 10:58:03 +0000985 const struct applesmc_entry *entry;
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700986
Henrik Rydberg58745832010-11-10 10:58:03 +0000987 entry = applesmc_get_entry_by_index(key_at_index);
988 if (IS_ERR(entry))
989 return PTR_ERR(entry);
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700990
Henrik Rydberg58745832010-11-10 10:58:03 +0000991 return snprintf(sysfsbuf, PAGE_SIZE, "%d\n", entry->len);
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700992}
993
994static ssize_t applesmc_key_at_index_type_show(struct device *dev,
995 struct device_attribute *attr, char *sysfsbuf)
996{
Henrik Rydberg58745832010-11-10 10:58:03 +0000997 const struct applesmc_entry *entry;
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700998
Henrik Rydberg58745832010-11-10 10:58:03 +0000999 entry = applesmc_get_entry_by_index(key_at_index);
1000 if (IS_ERR(entry))
1001 return PTR_ERR(entry);
Nicolas Boichat6f2fad72007-05-08 00:24:52 -07001002
Henrik Rydberg58745832010-11-10 10:58:03 +00001003 return snprintf(sysfsbuf, PAGE_SIZE, "%s\n", entry->type);
Nicolas Boichat6f2fad72007-05-08 00:24:52 -07001004}
1005
1006static ssize_t applesmc_key_at_index_name_show(struct device *dev,
1007 struct device_attribute *attr, char *sysfsbuf)
1008{
Henrik Rydberg58745832010-11-10 10:58:03 +00001009 const struct applesmc_entry *entry;
Nicolas Boichat6f2fad72007-05-08 00:24:52 -07001010
Henrik Rydberg58745832010-11-10 10:58:03 +00001011 entry = applesmc_get_entry_by_index(key_at_index);
1012 if (IS_ERR(entry))
1013 return PTR_ERR(entry);
Nicolas Boichat6f2fad72007-05-08 00:24:52 -07001014
Henrik Rydberg58745832010-11-10 10:58:03 +00001015 return snprintf(sysfsbuf, PAGE_SIZE, "%s\n", entry->key);
Nicolas Boichat6f2fad72007-05-08 00:24:52 -07001016}
1017
1018static ssize_t applesmc_key_at_index_show(struct device *dev,
1019 struct device_attribute *attr, char *sysfsbuf)
1020{
1021 return snprintf(sysfsbuf, PAGE_SIZE, "%d\n", key_at_index);
1022}
1023
1024static ssize_t applesmc_key_at_index_store(struct device *dev,
1025 struct device_attribute *attr, const char *sysfsbuf, size_t count)
1026{
Henrik Rydberg58745832010-11-10 10:58:03 +00001027 unsigned long newkey;
Nicolas Boichat6f2fad72007-05-08 00:24:52 -07001028
Frans Meulenbroeks179c4fd2012-01-04 20:58:52 +01001029 if (kstrtoul(sysfsbuf, 10, &newkey) < 0
Henrik Rydberg58745832010-11-10 10:58:03 +00001030 || newkey >= smcreg.key_count)
1031 return -EINVAL;
Nicolas Boichat6f2fad72007-05-08 00:24:52 -07001032
Henrik Rydberg58745832010-11-10 10:58:03 +00001033 key_at_index = newkey;
Nicolas Boichat6f2fad72007-05-08 00:24:52 -07001034 return count;
1035}
1036
1037static struct led_classdev applesmc_backlight = {
Richard Purdie6c152be2007-10-31 15:00:07 +01001038 .name = "smc::kbd_backlight",
Nicolas Boichat6f2fad72007-05-08 00:24:52 -07001039 .default_trigger = "nand-disk",
1040 .brightness_set = applesmc_brightness_set,
1041};
1042
Henrik Rydberg0b0b5df2010-11-09 15:15:09 +00001043static struct applesmc_node_group info_group[] = {
1044 { "name", applesmc_name_show },
1045 { "key_count", applesmc_key_count_show },
1046 { "key_at_index", applesmc_key_at_index_show, applesmc_key_at_index_store },
1047 { "key_at_index_name", applesmc_key_at_index_name_show },
1048 { "key_at_index_type", applesmc_key_at_index_type_show },
1049 { "key_at_index_data_length", applesmc_key_at_index_data_length_show },
1050 { "key_at_index_data", applesmc_key_at_index_read_show },
1051 { }
Nicolas Boichat6f2fad72007-05-08 00:24:52 -07001052};
1053
Henrik Rydberg0b0b5df2010-11-09 15:15:09 +00001054static struct applesmc_node_group accelerometer_group[] = {
1055 { "position", applesmc_position_show },
1056 { "calibrate", applesmc_calibrate_show, applesmc_calibrate_store },
1057 { }
Nicolas Boichat6f2fad72007-05-08 00:24:52 -07001058};
1059
Henrik Rydberg0b0b5df2010-11-09 15:15:09 +00001060static struct applesmc_node_group light_sensor_group[] = {
1061 { "light", applesmc_light_show },
1062 { }
1063};
Nicolas Boichat6f2fad72007-05-08 00:24:52 -07001064
Henrik Rydberg3eba2bf2010-11-09 15:15:08 +00001065static struct applesmc_node_group fan_group[] = {
1066 { "fan%d_label", applesmc_show_fan_position },
1067 { "fan%d_input", applesmc_show_fan_speed, NULL, 0 },
1068 { "fan%d_min", applesmc_show_fan_speed, applesmc_store_fan_speed, 1 },
1069 { "fan%d_max", applesmc_show_fan_speed, NULL, 2 },
1070 { "fan%d_safe", applesmc_show_fan_speed, NULL, 3 },
1071 { "fan%d_output", applesmc_show_fan_speed, applesmc_store_fan_speed, 4 },
1072 { "fan%d_manual", applesmc_show_fan_manual, applesmc_store_fan_manual },
1073 { }
Nicolas Boichat6f2fad72007-05-08 00:24:52 -07001074};
1075
Henrik Rydberg9792dad2010-11-10 10:58:04 +00001076static struct applesmc_node_group temp_group[] = {
1077 { "temp%d_label", applesmc_show_sensor_label },
1078 { "temp%d_input", applesmc_show_temperature },
1079 { }
Alex Murrayfa5575c2010-05-27 19:58:54 +02001080};
1081
Nicolas Boichat6f2fad72007-05-08 00:24:52 -07001082/* Module stuff */
1083
1084/*
Henrik Rydberg9792dad2010-11-10 10:58:04 +00001085 * applesmc_destroy_nodes - remove files and free associated memory
1086 */
1087static void applesmc_destroy_nodes(struct applesmc_node_group *groups)
1088{
1089 struct applesmc_node_group *grp;
1090 struct applesmc_dev_attr *node;
1091
1092 for (grp = groups; grp->nodes; grp++) {
1093 for (node = grp->nodes; node->sda.dev_attr.attr.name; node++)
1094 sysfs_remove_file(&pdev->dev.kobj,
1095 &node->sda.dev_attr.attr);
1096 kfree(grp->nodes);
1097 grp->nodes = NULL;
1098 }
1099}
1100
1101/*
1102 * applesmc_create_nodes - create a two-dimensional group of sysfs files
1103 */
1104static int applesmc_create_nodes(struct applesmc_node_group *groups, int num)
1105{
1106 struct applesmc_node_group *grp;
1107 struct applesmc_dev_attr *node;
1108 struct attribute *attr;
1109 int ret, i;
1110
1111 for (grp = groups; grp->format; grp++) {
1112 grp->nodes = kcalloc(num + 1, sizeof(*node), GFP_KERNEL);
1113 if (!grp->nodes) {
1114 ret = -ENOMEM;
1115 goto out;
1116 }
1117 for (i = 0; i < num; i++) {
1118 node = &grp->nodes[i];
1119 sprintf(node->name, grp->format, i + 1);
Henrik Rydberg3eba2bf2010-11-09 15:15:08 +00001120 node->sda.index = (grp->option << 16) | (i & 0xffff);
Henrik Rydberg9792dad2010-11-10 10:58:04 +00001121 node->sda.dev_attr.show = grp->show;
1122 node->sda.dev_attr.store = grp->store;
1123 attr = &node->sda.dev_attr.attr;
Henrik Rydberg9d1f8a402011-01-22 20:55:39 +01001124 sysfs_attr_init(attr);
Henrik Rydberg9792dad2010-11-10 10:58:04 +00001125 attr->name = node->name;
1126 attr->mode = S_IRUGO | (grp->store ? S_IWUSR : 0);
1127 ret = sysfs_create_file(&pdev->dev.kobj, attr);
1128 if (ret) {
1129 attr->name = NULL;
1130 goto out;
1131 }
1132 }
1133 }
1134
1135 return 0;
1136out:
1137 applesmc_destroy_nodes(groups);
1138 return ret;
1139}
1140
Nicolas Boichat6f2fad72007-05-08 00:24:52 -07001141/* Create accelerometer ressources */
1142static int applesmc_create_accelerometer(void)
1143{
Dmitry Torokhovd5cf2b92007-09-26 00:01:35 -04001144 struct input_dev *idev;
Nicolas Boichat6f2fad72007-05-08 00:24:52 -07001145 int ret;
1146
Henrik Rydberg0b0b5df2010-11-09 15:15:09 +00001147 if (!smcreg.has_accelerometer)
1148 return 0;
1149
1150 ret = applesmc_create_nodes(accelerometer_group, 1);
Nicolas Boichat6f2fad72007-05-08 00:24:52 -07001151 if (ret)
1152 goto out;
1153
Dmitry Torokhovd5cf2b92007-09-26 00:01:35 -04001154 applesmc_idev = input_allocate_polled_device();
Nicolas Boichat6f2fad72007-05-08 00:24:52 -07001155 if (!applesmc_idev) {
1156 ret = -ENOMEM;
1157 goto out_sysfs;
1158 }
1159
Dmitry Torokhovd5cf2b92007-09-26 00:01:35 -04001160 applesmc_idev->poll = applesmc_idev_poll;
1161 applesmc_idev->poll_interval = APPLESMC_POLL_INTERVAL;
1162
Nicolas Boichat6f2fad72007-05-08 00:24:52 -07001163 /* initial calibrate for the input device */
1164 applesmc_calibrate();
1165
Dmitry Torokhovd5cf2b92007-09-26 00:01:35 -04001166 /* initialize the input device */
1167 idev = applesmc_idev->input;
1168 idev->name = "applesmc";
1169 idev->id.bustype = BUS_HOST;
1170 idev->dev.parent = &pdev->dev;
Jiri Slaby7b19ada2007-10-18 23:40:32 -07001171 idev->evbit[0] = BIT_MASK(EV_ABS);
Dmitry Torokhovd5cf2b92007-09-26 00:01:35 -04001172 input_set_abs_params(idev, ABS_X,
Nicolas Boichat6f2fad72007-05-08 00:24:52 -07001173 -256, 256, APPLESMC_INPUT_FUZZ, APPLESMC_INPUT_FLAT);
Dmitry Torokhovd5cf2b92007-09-26 00:01:35 -04001174 input_set_abs_params(idev, ABS_Y,
Nicolas Boichat6f2fad72007-05-08 00:24:52 -07001175 -256, 256, APPLESMC_INPUT_FUZZ, APPLESMC_INPUT_FLAT);
1176
Dmitry Torokhovd5cf2b92007-09-26 00:01:35 -04001177 ret = input_register_polled_device(applesmc_idev);
Nicolas Boichat6f2fad72007-05-08 00:24:52 -07001178 if (ret)
1179 goto out_idev;
1180
Nicolas Boichat6f2fad72007-05-08 00:24:52 -07001181 return 0;
1182
1183out_idev:
Dmitry Torokhovd5cf2b92007-09-26 00:01:35 -04001184 input_free_polled_device(applesmc_idev);
Nicolas Boichat6f2fad72007-05-08 00:24:52 -07001185
1186out_sysfs:
Henrik Rydberg0b0b5df2010-11-09 15:15:09 +00001187 applesmc_destroy_nodes(accelerometer_group);
Nicolas Boichat6f2fad72007-05-08 00:24:52 -07001188
1189out:
Joe Perches1ee7c712010-11-09 15:15:03 +00001190 pr_warn("driver init failed (ret=%d)!\n", ret);
Nicolas Boichat6f2fad72007-05-08 00:24:52 -07001191 return ret;
1192}
1193
1194/* Release all ressources used by the accelerometer */
1195static void applesmc_release_accelerometer(void)
1196{
Henrik Rydberg0b0b5df2010-11-09 15:15:09 +00001197 if (!smcreg.has_accelerometer)
1198 return;
Dmitry Torokhovd5cf2b92007-09-26 00:01:35 -04001199 input_unregister_polled_device(applesmc_idev);
1200 input_free_polled_device(applesmc_idev);
Henrik Rydberg0b0b5df2010-11-09 15:15:09 +00001201 applesmc_destroy_nodes(accelerometer_group);
Nicolas Boichat6f2fad72007-05-08 00:24:52 -07001202}
Henrik Rydberg0b0b5df2010-11-09 15:15:09 +00001203
1204static int applesmc_create_light_sensor(void)
1205{
1206 if (!smcreg.num_light_sensors)
1207 return 0;
1208 return applesmc_create_nodes(light_sensor_group, 1);
1209}
1210
1211static void applesmc_release_light_sensor(void)
1212{
1213 if (!smcreg.num_light_sensors)
1214 return;
1215 applesmc_destroy_nodes(light_sensor_group);
1216}
1217
1218static int applesmc_create_key_backlight(void)
1219{
1220 if (!smcreg.has_key_backlight)
1221 return 0;
1222 applesmc_led_wq = create_singlethread_workqueue("applesmc-led");
1223 if (!applesmc_led_wq)
1224 return -ENOMEM;
1225 return led_classdev_register(&pdev->dev, &applesmc_backlight);
1226}
1227
1228static void applesmc_release_key_backlight(void)
1229{
1230 if (!smcreg.has_key_backlight)
1231 return;
1232 led_classdev_unregister(&applesmc_backlight);
1233 destroy_workqueue(applesmc_led_wq);
1234}
1235
Henrik Rydberg40ef06f2010-11-10 10:58:05 +00001236static int applesmc_dmi_match(const struct dmi_system_id *id)
1237{
1238 return 1;
1239}
Nicolas Boichat6f2fad72007-05-08 00:24:52 -07001240
Guenter Roeck85ebfd32012-01-19 11:02:15 -08001241/*
1242 * Note that DMI_MATCH(...,"MacBook") will match "MacBookPro1,1".
1243 * So we need to put "Apple MacBook Pro" before "Apple MacBook".
1244 */
Nicolas Boichat6f2fad72007-05-08 00:24:52 -07001245static __initdata struct dmi_system_id applesmc_whitelist[] = {
Henrik Rydbergf5274c92008-10-18 20:27:40 -07001246 { applesmc_dmi_match, "Apple MacBook Air", {
1247 DMI_MATCH(DMI_BOARD_VENDOR, "Apple"),
1248 DMI_MATCH(DMI_PRODUCT_NAME, "MacBookAir") },
Henrik Rydberg40ef06f2010-11-10 10:58:05 +00001249 },
Nicolas Boichat6f2fad72007-05-08 00:24:52 -07001250 { applesmc_dmi_match, "Apple MacBook Pro", {
Guenter Roeck2bfe8142010-11-10 10:42:21 -08001251 DMI_MATCH(DMI_BOARD_VENDOR, "Apple"),
1252 DMI_MATCH(DMI_PRODUCT_NAME, "MacBookPro") },
Henrik Rydberg40ef06f2010-11-10 10:58:05 +00001253 },
Riki Oktariantocd19ba12008-02-04 23:41:58 -08001254 { applesmc_dmi_match, "Apple MacBook", {
Guenter Roeck2bfe8142010-11-10 10:42:21 -08001255 DMI_MATCH(DMI_BOARD_VENDOR, "Apple"),
1256 DMI_MATCH(DMI_PRODUCT_NAME, "MacBook") },
Henrik Rydberg40ef06f2010-11-10 10:58:05 +00001257 },
Nicolas Boichat6f2fad72007-05-08 00:24:52 -07001258 { applesmc_dmi_match, "Apple Macmini", {
Guenter Roeck2bfe8142010-11-10 10:42:21 -08001259 DMI_MATCH(DMI_BOARD_VENDOR, "Apple"),
1260 DMI_MATCH(DMI_PRODUCT_NAME, "Macmini") },
Henrik Rydberg40ef06f2010-11-10 10:58:05 +00001261 },
Henrik Rydberg45a3a362008-11-19 15:36:42 -08001262 { applesmc_dmi_match, "Apple MacPro", {
1263 DMI_MATCH(DMI_BOARD_VENDOR, "Apple"),
1264 DMI_MATCH(DMI_PRODUCT_NAME, "MacPro") },
Henrik Rydberg40ef06f2010-11-10 10:58:05 +00001265 },
Roberto De Ioris9f86f282008-08-15 00:40:30 -07001266 { applesmc_dmi_match, "Apple iMac", {
Guenter Roeck2bfe8142010-11-10 10:42:21 -08001267 DMI_MATCH(DMI_BOARD_VENDOR, "Apple"),
1268 DMI_MATCH(DMI_PRODUCT_NAME, "iMac") },
Henrik Rydberg40ef06f2010-11-10 10:58:05 +00001269 },
Nicolas Boichat6f2fad72007-05-08 00:24:52 -07001270 { .ident = NULL }
1271};
1272
1273static int __init applesmc_init(void)
1274{
1275 int ret;
Nicolas Boichat6f2fad72007-05-08 00:24:52 -07001276
Nicolas Boichat6f2fad72007-05-08 00:24:52 -07001277 if (!dmi_check_system(applesmc_whitelist)) {
Joe Perches1ee7c712010-11-09 15:15:03 +00001278 pr_warn("supported laptop not found!\n");
Nicolas Boichat6f2fad72007-05-08 00:24:52 -07001279 ret = -ENODEV;
1280 goto out;
1281 }
1282
1283 if (!request_region(APPLESMC_DATA_PORT, APPLESMC_NR_PORTS,
1284 "applesmc")) {
1285 ret = -ENXIO;
1286 goto out;
1287 }
1288
1289 ret = platform_driver_register(&applesmc_driver);
1290 if (ret)
1291 goto out_region;
1292
Jean Delvareddfbf2a2007-05-08 20:27:04 -07001293 pdev = platform_device_register_simple("applesmc", APPLESMC_DATA_PORT,
1294 NULL, 0);
Nicolas Boichat6f2fad72007-05-08 00:24:52 -07001295 if (IS_ERR(pdev)) {
1296 ret = PTR_ERR(pdev);
1297 goto out_driver;
1298 }
1299
Henrik Rydberg58745832010-11-10 10:58:03 +00001300 /* create register cache */
1301 ret = applesmc_init_smcreg();
Nicolas Boichat6996abf2007-05-27 22:17:43 +02001302 if (ret)
1303 goto out_device;
Nicolas Boichatfa744192007-05-23 13:58:13 -07001304
Henrik Rydberg0b0b5df2010-11-09 15:15:09 +00001305 ret = applesmc_create_nodes(info_group, 1);
Henrik Rydberg58745832010-11-10 10:58:03 +00001306 if (ret)
1307 goto out_smcreg;
1308
Henrik Rydberg3eba2bf2010-11-09 15:15:08 +00001309 ret = applesmc_create_nodes(fan_group, smcreg.fan_count);
1310 if (ret)
1311 goto out_info;
Nicolas Boichat6f2fad72007-05-08 00:24:52 -07001312
Henrik Rydberge30bca12012-07-16 09:18:11 +02001313 ret = applesmc_create_nodes(temp_group, smcreg.index_count);
Henrik Rydberg9792dad2010-11-10 10:58:04 +00001314 if (ret)
1315 goto out_fans;
Nicolas Boichat6f2fad72007-05-08 00:24:52 -07001316
Henrik Rydberg0b0b5df2010-11-09 15:15:09 +00001317 ret = applesmc_create_accelerometer();
1318 if (ret)
1319 goto out_temperature;
Nicolas Boichat6f2fad72007-05-08 00:24:52 -07001320
Henrik Rydberg0b0b5df2010-11-09 15:15:09 +00001321 ret = applesmc_create_light_sensor();
1322 if (ret)
1323 goto out_accelerometer;
Nicolas Boichat6f2fad72007-05-08 00:24:52 -07001324
Henrik Rydberg0b0b5df2010-11-09 15:15:09 +00001325 ret = applesmc_create_key_backlight();
1326 if (ret)
1327 goto out_light_sysfs;
Nicolas Boichat6f2fad72007-05-08 00:24:52 -07001328
Tony Jones1beeffe2007-08-20 13:46:20 -07001329 hwmon_dev = hwmon_device_register(&pdev->dev);
1330 if (IS_ERR(hwmon_dev)) {
1331 ret = PTR_ERR(hwmon_dev);
Nicolas Boichat6f2fad72007-05-08 00:24:52 -07001332 goto out_light_ledclass;
1333 }
1334
Nicolas Boichat6f2fad72007-05-08 00:24:52 -07001335 return 0;
1336
1337out_light_ledclass:
Henrik Rydberg0b0b5df2010-11-09 15:15:09 +00001338 applesmc_release_key_backlight();
Nicolas Boichat6f2fad72007-05-08 00:24:52 -07001339out_light_sysfs:
Henrik Rydberg0b0b5df2010-11-09 15:15:09 +00001340 applesmc_release_light_sensor();
Nicolas Boichat6f2fad72007-05-08 00:24:52 -07001341out_accelerometer:
Henrik Rydberg0b0b5df2010-11-09 15:15:09 +00001342 applesmc_release_accelerometer();
Nicolas Boichat6f2fad72007-05-08 00:24:52 -07001343out_temperature:
Henrik Rydberg9792dad2010-11-10 10:58:04 +00001344 applesmc_destroy_nodes(temp_group);
Henrik Rydberg0559a532010-05-11 09:17:47 +02001345out_fans:
Henrik Rydberg3eba2bf2010-11-09 15:15:08 +00001346 applesmc_destroy_nodes(fan_group);
1347out_info:
Henrik Rydberg0b0b5df2010-11-09 15:15:09 +00001348 applesmc_destroy_nodes(info_group);
Henrik Rydberg58745832010-11-10 10:58:03 +00001349out_smcreg:
1350 applesmc_destroy_smcreg();
Nicolas Boichat6f2fad72007-05-08 00:24:52 -07001351out_device:
1352 platform_device_unregister(pdev);
1353out_driver:
1354 platform_driver_unregister(&applesmc_driver);
1355out_region:
1356 release_region(APPLESMC_DATA_PORT, APPLESMC_NR_PORTS);
1357out:
Joe Perches1ee7c712010-11-09 15:15:03 +00001358 pr_warn("driver init failed (ret=%d)!\n", ret);
Nicolas Boichat6f2fad72007-05-08 00:24:52 -07001359 return ret;
1360}
1361
1362static void __exit applesmc_exit(void)
1363{
Tony Jones1beeffe2007-08-20 13:46:20 -07001364 hwmon_device_unregister(hwmon_dev);
Henrik Rydberg0b0b5df2010-11-09 15:15:09 +00001365 applesmc_release_key_backlight();
1366 applesmc_release_light_sensor();
1367 applesmc_release_accelerometer();
Henrik Rydberg9792dad2010-11-10 10:58:04 +00001368 applesmc_destroy_nodes(temp_group);
Henrik Rydberg3eba2bf2010-11-09 15:15:08 +00001369 applesmc_destroy_nodes(fan_group);
Henrik Rydberg0b0b5df2010-11-09 15:15:09 +00001370 applesmc_destroy_nodes(info_group);
Henrik Rydberg58745832010-11-10 10:58:03 +00001371 applesmc_destroy_smcreg();
Nicolas Boichat6f2fad72007-05-08 00:24:52 -07001372 platform_device_unregister(pdev);
1373 platform_driver_unregister(&applesmc_driver);
1374 release_region(APPLESMC_DATA_PORT, APPLESMC_NR_PORTS);
Nicolas Boichat6f2fad72007-05-08 00:24:52 -07001375}
1376
1377module_init(applesmc_init);
1378module_exit(applesmc_exit);
1379
1380MODULE_AUTHOR("Nicolas Boichat");
1381MODULE_DESCRIPTION("Apple SMC");
1382MODULE_LICENSE("GPL v2");
Henrik Rydbergdc924ef2008-12-01 13:13:49 -08001383MODULE_DEVICE_TABLE(dmi, applesmc_whitelist);