blob: b201129a9beaeebde3e512d60bbae1bf2fd1ee01 [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;
Shuah Khan5e0a0ee2015-11-05 15:39:27 -0700540 bool left_light_sensor = 0, right_light_sensor = 0;
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];
Guenter Roeck1009ccd2017-07-11 20:53:55 -0700569 if (s->fan_count > 10)
570 s->fan_count = 10;
Henrik Rydberg3eba2bf2010-11-09 15:15:08 +0000571
Henrik Rydberg9792dad2010-11-10 10:58:04 +0000572 ret = applesmc_get_lower_bound(&s->temp_begin, "T");
573 if (ret)
574 return ret;
575 ret = applesmc_get_lower_bound(&s->temp_end, "U");
576 if (ret)
577 return ret;
578 s->temp_count = s->temp_end - s->temp_begin;
579
Henrik Rydberge30bca12012-07-16 09:18:11 +0200580 ret = applesmc_init_index(s);
581 if (ret)
582 return ret;
583
Henrik Rydberg40ef06f2010-11-10 10:58:05 +0000584 ret = applesmc_has_key(LIGHT_SENSOR_LEFT_KEY, &left_light_sensor);
585 if (ret)
586 return ret;
587 ret = applesmc_has_key(LIGHT_SENSOR_RIGHT_KEY, &right_light_sensor);
588 if (ret)
589 return ret;
590 ret = applesmc_has_key(MOTION_SENSOR_KEY, &s->has_accelerometer);
591 if (ret)
592 return ret;
593 ret = applesmc_has_key(BACKLIGHT_KEY, &s->has_key_backlight);
594 if (ret)
595 return ret;
596
597 s->num_light_sensors = left_light_sensor + right_light_sensor;
Henrik Rydberg58745832010-11-10 10:58:03 +0000598 s->init_complete = true;
599
Henrik Rydberge30bca12012-07-16 09:18:11 +0200600 pr_info("key=%d fan=%d temp=%d index=%d acc=%d lux=%d kbd=%d\n",
601 s->key_count, s->fan_count, s->temp_count, s->index_count,
Henrik Rydberg40ef06f2010-11-10 10:58:05 +0000602 s->has_accelerometer,
603 s->num_light_sensors,
604 s->has_key_backlight);
Henrik Rydberg58745832010-11-10 10:58:03 +0000605
606 return 0;
607}
608
Henrik Rydberge30bca12012-07-16 09:18:11 +0200609static void applesmc_destroy_smcreg(void)
610{
611 kfree(smcreg.index);
612 smcreg.index = NULL;
613 kfree(smcreg.cache);
614 smcreg.cache = NULL;
615 smcreg.init_complete = false;
616}
617
Henrik Rydberg58745832010-11-10 10:58:03 +0000618/*
619 * applesmc_init_smcreg - Initialize register cache.
620 *
621 * Retries until initialization is successful, or the operation times out.
622 *
623 */
624static int applesmc_init_smcreg(void)
625{
626 int ms, ret;
627
628 for (ms = 0; ms < INIT_TIMEOUT_MSECS; ms += INIT_WAIT_MSECS) {
629 ret = applesmc_init_smcreg_try();
630 if (!ret) {
631 if (ms)
632 pr_info("init_smcreg() took %d ms\n", ms);
633 return 0;
634 }
635 msleep(INIT_WAIT_MSECS);
636 }
637
Henrik Rydberge30bca12012-07-16 09:18:11 +0200638 applesmc_destroy_smcreg();
Henrik Rydberg58745832010-11-10 10:58:03 +0000639
640 return ret;
641}
642
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700643/* Device model stuff */
644static int applesmc_probe(struct platform_device *dev)
645{
Henrik Rydberg58745832010-11-10 10:58:03 +0000646 int ret;
647
648 ret = applesmc_init_smcreg();
649 if (ret)
650 return ret;
651
Henrik Rydberg2344cd02010-11-09 15:15:02 +0000652 applesmc_device_init();
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700653
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700654 return 0;
655}
656
Henrik Rydberga976f152009-09-21 17:04:50 -0700657/* Synchronize device with memorized backlight state */
658static int applesmc_pm_resume(struct device *dev)
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700659{
Henrik Rydberg40ef06f2010-11-10 10:58:05 +0000660 if (smcreg.has_key_backlight)
Henrik Rydberga976f152009-09-21 17:04:50 -0700661 applesmc_write_key(BACKLIGHT_KEY, backlight_state, 2);
Henrik Rydberga976f152009-09-21 17:04:50 -0700662 return 0;
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700663}
664
Henrik Rydberga976f152009-09-21 17:04:50 -0700665/* Reinitialize device on resume from hibernation */
666static int applesmc_pm_restore(struct device *dev)
667{
Henrik Rydberg2344cd02010-11-09 15:15:02 +0000668 applesmc_device_init();
Henrik Rydberga976f152009-09-21 17:04:50 -0700669 return applesmc_pm_resume(dev);
670}
671
Alexey Dobriyan47145212009-12-14 18:00:08 -0800672static const struct dev_pm_ops applesmc_pm_ops = {
Henrik Rydberga976f152009-09-21 17:04:50 -0700673 .resume = applesmc_pm_resume,
674 .restore = applesmc_pm_restore,
675};
676
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700677static struct platform_driver applesmc_driver = {
678 .probe = applesmc_probe,
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700679 .driver = {
680 .name = "applesmc",
Henrik Rydberga976f152009-09-21 17:04:50 -0700681 .pm = &applesmc_pm_ops,
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700682 },
683};
684
685/*
686 * applesmc_calibrate - Set our "resting" values. Callers must
687 * hold applesmc_lock.
688 */
689static void applesmc_calibrate(void)
690{
Henrik Rydbergedf48f32012-06-20 18:00:06 +0200691 applesmc_read_s16(MOTION_SENSOR_X_KEY, &rest_x);
692 applesmc_read_s16(MOTION_SENSOR_Y_KEY, &rest_y);
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700693 rest_x = -rest_x;
694}
695
Dmitry Torokhovd5cf2b92007-09-26 00:01:35 -0400696static void applesmc_idev_poll(struct input_polled_dev *dev)
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700697{
Dmitry Torokhovd5cf2b92007-09-26 00:01:35 -0400698 struct input_dev *idev = dev->input;
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700699 s16 x, y;
700
Henrik Rydbergedf48f32012-06-20 18:00:06 +0200701 if (applesmc_read_s16(MOTION_SENSOR_X_KEY, &x))
Henrik Rydberg58745832010-11-10 10:58:03 +0000702 return;
Henrik Rydbergedf48f32012-06-20 18:00:06 +0200703 if (applesmc_read_s16(MOTION_SENSOR_Y_KEY, &y))
Henrik Rydberg58745832010-11-10 10:58:03 +0000704 return;
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700705
706 x = -x;
Dmitry Torokhovd5cf2b92007-09-26 00:01:35 -0400707 input_report_abs(idev, ABS_X, x - rest_x);
708 input_report_abs(idev, ABS_Y, y - rest_y);
709 input_sync(idev);
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700710}
711
712/* Sysfs Files */
713
Nicolas Boichatfa744192007-05-23 13:58:13 -0700714static ssize_t applesmc_name_show(struct device *dev,
715 struct device_attribute *attr, char *buf)
716{
717 return snprintf(buf, PAGE_SIZE, "applesmc\n");
718}
719
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700720static ssize_t applesmc_position_show(struct device *dev,
721 struct device_attribute *attr, char *buf)
722{
723 int ret;
724 s16 x, y, z;
725
Henrik Rydbergedf48f32012-06-20 18:00:06 +0200726 ret = applesmc_read_s16(MOTION_SENSOR_X_KEY, &x);
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700727 if (ret)
728 goto out;
Henrik Rydbergedf48f32012-06-20 18:00:06 +0200729 ret = applesmc_read_s16(MOTION_SENSOR_Y_KEY, &y);
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700730 if (ret)
731 goto out;
Henrik Rydbergedf48f32012-06-20 18:00:06 +0200732 ret = applesmc_read_s16(MOTION_SENSOR_Z_KEY, &z);
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700733 if (ret)
734 goto out;
735
736out:
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700737 if (ret)
738 return ret;
739 else
740 return snprintf(buf, PAGE_SIZE, "(%d,%d,%d)\n", x, y, z);
741}
742
743static ssize_t applesmc_light_show(struct device *dev,
744 struct device_attribute *attr, char *sysfsbuf)
745{
Henrik Rydberg58745832010-11-10 10:58:03 +0000746 const struct applesmc_entry *entry;
Henrik Rydberg8bd1a122008-10-18 20:27:39 -0700747 static int data_length;
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700748 int ret;
749 u8 left = 0, right = 0;
Henrik Rydberg58745832010-11-10 10:58:03 +0000750 u8 buffer[10];
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700751
Henrik Rydberg8bd1a122008-10-18 20:27:39 -0700752 if (!data_length) {
Henrik Rydberg58745832010-11-10 10:58:03 +0000753 entry = applesmc_get_entry_by_key(LIGHT_SENSOR_LEFT_KEY);
754 if (IS_ERR(entry))
755 return PTR_ERR(entry);
756 if (entry->len > 10)
757 return -ENXIO;
758 data_length = entry->len;
Joe Perches1ee7c712010-11-09 15:15:03 +0000759 pr_info("light sensor data length set to %d\n", data_length);
Henrik Rydberg8bd1a122008-10-18 20:27:39 -0700760 }
761
762 ret = applesmc_read_key(LIGHT_SENSOR_LEFT_KEY, buffer, data_length);
Tom Rix3e740e72020-08-20 06:19:32 -0700763 if (ret)
764 goto out;
Alex Murrayc3d63622009-01-15 13:51:08 -0800765 /* newer macbooks report a single 10-bit bigendian value */
766 if (data_length == 10) {
767 left = be16_to_cpu(*(__be16 *)(buffer + 6)) >> 2;
768 goto out;
769 }
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700770 left = buffer[2];
Tom Rix3e740e72020-08-20 06:19:32 -0700771
772 ret = applesmc_read_key(LIGHT_SENSOR_RIGHT_KEY, buffer, data_length);
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700773 if (ret)
774 goto out;
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700775 right = buffer[2];
776
777out:
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700778 if (ret)
779 return ret;
780 else
781 return snprintf(sysfsbuf, PAGE_SIZE, "(%d,%d)\n", left, right);
782}
783
Alex Murrayfa5575c2010-05-27 19:58:54 +0200784/* Displays sensor key as label */
785static ssize_t applesmc_show_sensor_label(struct device *dev,
786 struct device_attribute *devattr, char *sysfsbuf)
787{
Henrik Rydberge30bca12012-07-16 09:18:11 +0200788 const char *key = smcreg.index[to_index(devattr)];
Alex Murrayfa5575c2010-05-27 19:58:54 +0200789
Henrik Rydberge30bca12012-07-16 09:18:11 +0200790 return snprintf(sysfsbuf, PAGE_SIZE, "%s\n", key);
Alex Murrayfa5575c2010-05-27 19:58:54 +0200791}
792
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700793/* Displays degree Celsius * 1000 */
794static ssize_t applesmc_show_temperature(struct device *dev,
795 struct device_attribute *devattr, char *sysfsbuf)
796{
Henrik Rydberge30bca12012-07-16 09:18:11 +0200797 const char *key = smcreg.index[to_index(devattr)];
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700798 int ret;
Henrik Rydbergb6e51222012-07-16 09:18:10 +0200799 s16 value;
800 int temp;
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700801
Henrik Rydberge30bca12012-07-16 09:18:11 +0200802 ret = applesmc_read_s16(key, &value);
Henrik Rydberg9792dad2010-11-10 10:58:04 +0000803 if (ret)
804 return ret;
805
Henrik Rydbergb6e51222012-07-16 09:18:10 +0200806 temp = 250 * (value >> 6);
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700807
Henrik Rydbergb6e51222012-07-16 09:18:10 +0200808 return snprintf(sysfsbuf, PAGE_SIZE, "%d\n", temp);
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700809}
810
811static ssize_t applesmc_show_fan_speed(struct device *dev,
812 struct device_attribute *attr, char *sysfsbuf)
813{
814 int ret;
815 unsigned int speed = 0;
816 char newkey[5];
817 u8 buffer[2];
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700818
Guenter Roeck1009ccd2017-07-11 20:53:55 -0700819 scnprintf(newkey, sizeof(newkey), fan_speed_fmt[to_option(attr)],
820 to_index(attr));
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700821
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700822 ret = applesmc_read_key(newkey, buffer, 2);
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700823 if (ret)
824 return ret;
Tom Rix3e740e72020-08-20 06:19:32 -0700825
826 speed = ((buffer[0] << 8 | buffer[1]) >> 2);
827 return snprintf(sysfsbuf, PAGE_SIZE, "%u\n", speed);
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700828}
829
830static ssize_t applesmc_store_fan_speed(struct device *dev,
831 struct device_attribute *attr,
832 const char *sysfsbuf, size_t count)
833{
834 int ret;
Guenter Roeck2bfe8142010-11-10 10:42:21 -0800835 unsigned long speed;
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700836 char newkey[5];
837 u8 buffer[2];
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700838
Frans Meulenbroeks179c4fd2012-01-04 20:58:52 +0100839 if (kstrtoul(sysfsbuf, 10, &speed) < 0 || speed >= 0x4000)
Guenter Roeck2bfe8142010-11-10 10:42:21 -0800840 return -EINVAL; /* Bigger than a 14-bit value */
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700841
Guenter Roeck1009ccd2017-07-11 20:53:55 -0700842 scnprintf(newkey, sizeof(newkey), fan_speed_fmt[to_option(attr)],
843 to_index(attr));
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700844
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700845 buffer[0] = (speed >> 6) & 0xff;
846 buffer[1] = (speed << 2) & 0xff;
847 ret = applesmc_write_key(newkey, buffer, 2);
848
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700849 if (ret)
850 return ret;
851 else
852 return count;
853}
854
855static ssize_t applesmc_show_fan_manual(struct device *dev,
Henrik Rydberg3eba2bf2010-11-09 15:15:08 +0000856 struct device_attribute *attr, char *sysfsbuf)
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700857{
858 int ret;
859 u16 manual = 0;
860 u8 buffer[2];
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700861
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700862 ret = applesmc_read_key(FANS_MANUAL, buffer, 2);
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700863 if (ret)
864 return ret;
Tom Rix3e740e72020-08-20 06:19:32 -0700865
866 manual = ((buffer[0] << 8 | buffer[1]) >> to_index(attr)) & 0x01;
867 return snprintf(sysfsbuf, PAGE_SIZE, "%d\n", manual);
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700868}
869
870static ssize_t applesmc_store_fan_manual(struct device *dev,
Henrik Rydberg3eba2bf2010-11-09 15:15:08 +0000871 struct device_attribute *attr,
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700872 const char *sysfsbuf, size_t count)
873{
874 int ret;
875 u8 buffer[2];
Guenter Roeck2bfe8142010-11-10 10:42:21 -0800876 unsigned long input;
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700877 u16 val;
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700878
Frans Meulenbroeks179c4fd2012-01-04 20:58:52 +0100879 if (kstrtoul(sysfsbuf, 10, &input) < 0)
Guenter Roeck2bfe8142010-11-10 10:42:21 -0800880 return -EINVAL;
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700881
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700882 ret = applesmc_read_key(FANS_MANUAL, buffer, 2);
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700883 if (ret)
884 goto out;
885
Tom Rix3e740e72020-08-20 06:19:32 -0700886 val = (buffer[0] << 8 | buffer[1]);
887
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700888 if (input)
Henrik Rydberg3eba2bf2010-11-09 15:15:08 +0000889 val = val | (0x01 << to_index(attr));
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700890 else
Henrik Rydberg3eba2bf2010-11-09 15:15:08 +0000891 val = val & ~(0x01 << to_index(attr));
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700892
893 buffer[0] = (val >> 8) & 0xFF;
894 buffer[1] = val & 0xFF;
895
896 ret = applesmc_write_key(FANS_MANUAL, buffer, 2);
897
898out:
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700899 if (ret)
900 return ret;
901 else
902 return count;
903}
904
905static ssize_t applesmc_show_fan_position(struct device *dev,
906 struct device_attribute *attr, char *sysfsbuf)
907{
908 int ret;
909 char newkey[5];
910 u8 buffer[17];
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700911
Guenter Roeck1009ccd2017-07-11 20:53:55 -0700912 scnprintf(newkey, sizeof(newkey), FAN_ID_FMT, to_index(attr));
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700913
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700914 ret = applesmc_read_key(newkey, buffer, 16);
915 buffer[16] = 0;
916
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700917 if (ret)
918 return ret;
919 else
920 return snprintf(sysfsbuf, PAGE_SIZE, "%s\n", buffer+4);
921}
922
923static ssize_t applesmc_calibrate_show(struct device *dev,
924 struct device_attribute *attr, char *sysfsbuf)
925{
926 return snprintf(sysfsbuf, PAGE_SIZE, "(%d,%d)\n", rest_x, rest_y);
927}
928
929static ssize_t applesmc_calibrate_store(struct device *dev,
930 struct device_attribute *attr, const char *sysfsbuf, size_t count)
931{
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700932 applesmc_calibrate();
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700933
934 return count;
935}
936
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700937static void applesmc_backlight_set(struct work_struct *work)
938{
Henrik Rydberga976f152009-09-21 17:04:50 -0700939 applesmc_write_key(BACKLIGHT_KEY, backlight_state, 2);
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700940}
941static DECLARE_WORK(backlight_work, &applesmc_backlight_set);
942
943static void applesmc_brightness_set(struct led_classdev *led_cdev,
944 enum led_brightness value)
945{
946 int ret;
947
Henrik Rydberga976f152009-09-21 17:04:50 -0700948 backlight_state[0] = value;
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700949 ret = queue_work(applesmc_led_wq, &backlight_work);
950
951 if (debug && (!ret))
Guenter Roeck692fe502013-01-10 05:49:55 -0800952 dev_dbg(led_cdev->dev, "work was already on the queue.\n");
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700953}
954
955static ssize_t applesmc_key_count_show(struct device *dev,
956 struct device_attribute *attr, char *sysfsbuf)
957{
958 int ret;
959 u8 buffer[4];
960 u32 count;
961
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700962 ret = applesmc_read_key(KEY_COUNT_KEY, buffer, 4);
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700963 if (ret)
964 return ret;
Tom Rix3e740e72020-08-20 06:19:32 -0700965
966 count = ((u32)buffer[0]<<24) + ((u32)buffer[1]<<16) +
967 ((u32)buffer[2]<<8) + buffer[3];
968 return snprintf(sysfsbuf, PAGE_SIZE, "%d\n", count);
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700969}
970
971static ssize_t applesmc_key_at_index_read_show(struct device *dev,
972 struct device_attribute *attr, char *sysfsbuf)
973{
Henrik Rydberg58745832010-11-10 10:58:03 +0000974 const struct applesmc_entry *entry;
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700975 int ret;
976
Henrik Rydberg58745832010-11-10 10:58:03 +0000977 entry = applesmc_get_entry_by_index(key_at_index);
978 if (IS_ERR(entry))
979 return PTR_ERR(entry);
980 ret = applesmc_read_entry(entry, sysfsbuf, entry->len);
981 if (ret)
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700982 return ret;
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700983
Henrik Rydberg58745832010-11-10 10:58:03 +0000984 return entry->len;
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700985}
986
987static ssize_t applesmc_key_at_index_data_length_show(struct device *dev,
988 struct device_attribute *attr, char *sysfsbuf)
989{
Henrik Rydberg58745832010-11-10 10:58:03 +0000990 const struct applesmc_entry *entry;
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700991
Henrik Rydberg58745832010-11-10 10:58:03 +0000992 entry = applesmc_get_entry_by_index(key_at_index);
993 if (IS_ERR(entry))
994 return PTR_ERR(entry);
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700995
Henrik Rydberg58745832010-11-10 10:58:03 +0000996 return snprintf(sysfsbuf, PAGE_SIZE, "%d\n", entry->len);
Nicolas Boichat6f2fad72007-05-08 00:24:52 -0700997}
998
999static ssize_t applesmc_key_at_index_type_show(struct device *dev,
1000 struct device_attribute *attr, char *sysfsbuf)
1001{
Henrik Rydberg58745832010-11-10 10:58:03 +00001002 const struct applesmc_entry *entry;
Nicolas Boichat6f2fad72007-05-08 00:24:52 -07001003
Henrik Rydberg58745832010-11-10 10:58:03 +00001004 entry = applesmc_get_entry_by_index(key_at_index);
1005 if (IS_ERR(entry))
1006 return PTR_ERR(entry);
Nicolas Boichat6f2fad72007-05-08 00:24:52 -07001007
Henrik Rydberg58745832010-11-10 10:58:03 +00001008 return snprintf(sysfsbuf, PAGE_SIZE, "%s\n", entry->type);
Nicolas Boichat6f2fad72007-05-08 00:24:52 -07001009}
1010
1011static ssize_t applesmc_key_at_index_name_show(struct device *dev,
1012 struct device_attribute *attr, char *sysfsbuf)
1013{
Henrik Rydberg58745832010-11-10 10:58:03 +00001014 const struct applesmc_entry *entry;
Nicolas Boichat6f2fad72007-05-08 00:24:52 -07001015
Henrik Rydberg58745832010-11-10 10:58:03 +00001016 entry = applesmc_get_entry_by_index(key_at_index);
1017 if (IS_ERR(entry))
1018 return PTR_ERR(entry);
Nicolas Boichat6f2fad72007-05-08 00:24:52 -07001019
Henrik Rydberg58745832010-11-10 10:58:03 +00001020 return snprintf(sysfsbuf, PAGE_SIZE, "%s\n", entry->key);
Nicolas Boichat6f2fad72007-05-08 00:24:52 -07001021}
1022
1023static ssize_t applesmc_key_at_index_show(struct device *dev,
1024 struct device_attribute *attr, char *sysfsbuf)
1025{
1026 return snprintf(sysfsbuf, PAGE_SIZE, "%d\n", key_at_index);
1027}
1028
1029static ssize_t applesmc_key_at_index_store(struct device *dev,
1030 struct device_attribute *attr, const char *sysfsbuf, size_t count)
1031{
Henrik Rydberg58745832010-11-10 10:58:03 +00001032 unsigned long newkey;
Nicolas Boichat6f2fad72007-05-08 00:24:52 -07001033
Frans Meulenbroeks179c4fd2012-01-04 20:58:52 +01001034 if (kstrtoul(sysfsbuf, 10, &newkey) < 0
Henrik Rydberg58745832010-11-10 10:58:03 +00001035 || newkey >= smcreg.key_count)
1036 return -EINVAL;
Nicolas Boichat6f2fad72007-05-08 00:24:52 -07001037
Henrik Rydberg58745832010-11-10 10:58:03 +00001038 key_at_index = newkey;
Nicolas Boichat6f2fad72007-05-08 00:24:52 -07001039 return count;
1040}
1041
1042static struct led_classdev applesmc_backlight = {
Richard Purdie6c152be2007-10-31 15:00:07 +01001043 .name = "smc::kbd_backlight",
Nicolas Boichat6f2fad72007-05-08 00:24:52 -07001044 .default_trigger = "nand-disk",
1045 .brightness_set = applesmc_brightness_set,
1046};
1047
Henrik Rydberg0b0b5df2010-11-09 15:15:09 +00001048static struct applesmc_node_group info_group[] = {
1049 { "name", applesmc_name_show },
1050 { "key_count", applesmc_key_count_show },
1051 { "key_at_index", applesmc_key_at_index_show, applesmc_key_at_index_store },
1052 { "key_at_index_name", applesmc_key_at_index_name_show },
1053 { "key_at_index_type", applesmc_key_at_index_type_show },
1054 { "key_at_index_data_length", applesmc_key_at_index_data_length_show },
1055 { "key_at_index_data", applesmc_key_at_index_read_show },
1056 { }
Nicolas Boichat6f2fad72007-05-08 00:24:52 -07001057};
1058
Henrik Rydberg0b0b5df2010-11-09 15:15:09 +00001059static struct applesmc_node_group accelerometer_group[] = {
1060 { "position", applesmc_position_show },
1061 { "calibrate", applesmc_calibrate_show, applesmc_calibrate_store },
1062 { }
Nicolas Boichat6f2fad72007-05-08 00:24:52 -07001063};
1064
Henrik Rydberg0b0b5df2010-11-09 15:15:09 +00001065static struct applesmc_node_group light_sensor_group[] = {
1066 { "light", applesmc_light_show },
1067 { }
1068};
Nicolas Boichat6f2fad72007-05-08 00:24:52 -07001069
Henrik Rydberg3eba2bf2010-11-09 15:15:08 +00001070static struct applesmc_node_group fan_group[] = {
1071 { "fan%d_label", applesmc_show_fan_position },
1072 { "fan%d_input", applesmc_show_fan_speed, NULL, 0 },
1073 { "fan%d_min", applesmc_show_fan_speed, applesmc_store_fan_speed, 1 },
1074 { "fan%d_max", applesmc_show_fan_speed, NULL, 2 },
1075 { "fan%d_safe", applesmc_show_fan_speed, NULL, 3 },
1076 { "fan%d_output", applesmc_show_fan_speed, applesmc_store_fan_speed, 4 },
1077 { "fan%d_manual", applesmc_show_fan_manual, applesmc_store_fan_manual },
1078 { }
Nicolas Boichat6f2fad72007-05-08 00:24:52 -07001079};
1080
Henrik Rydberg9792dad2010-11-10 10:58:04 +00001081static struct applesmc_node_group temp_group[] = {
1082 { "temp%d_label", applesmc_show_sensor_label },
1083 { "temp%d_input", applesmc_show_temperature },
1084 { }
Alex Murrayfa5575c2010-05-27 19:58:54 +02001085};
1086
Nicolas Boichat6f2fad72007-05-08 00:24:52 -07001087/* Module stuff */
1088
1089/*
Henrik Rydberg9792dad2010-11-10 10:58:04 +00001090 * applesmc_destroy_nodes - remove files and free associated memory
1091 */
1092static void applesmc_destroy_nodes(struct applesmc_node_group *groups)
1093{
1094 struct applesmc_node_group *grp;
1095 struct applesmc_dev_attr *node;
1096
1097 for (grp = groups; grp->nodes; grp++) {
1098 for (node = grp->nodes; node->sda.dev_attr.attr.name; node++)
1099 sysfs_remove_file(&pdev->dev.kobj,
1100 &node->sda.dev_attr.attr);
1101 kfree(grp->nodes);
1102 grp->nodes = NULL;
1103 }
1104}
1105
1106/*
1107 * applesmc_create_nodes - create a two-dimensional group of sysfs files
1108 */
1109static int applesmc_create_nodes(struct applesmc_node_group *groups, int num)
1110{
1111 struct applesmc_node_group *grp;
1112 struct applesmc_dev_attr *node;
1113 struct attribute *attr;
1114 int ret, i;
1115
1116 for (grp = groups; grp->format; grp++) {
1117 grp->nodes = kcalloc(num + 1, sizeof(*node), GFP_KERNEL);
1118 if (!grp->nodes) {
1119 ret = -ENOMEM;
1120 goto out;
1121 }
1122 for (i = 0; i < num; i++) {
1123 node = &grp->nodes[i];
Guenter Roeck1009ccd2017-07-11 20:53:55 -07001124 scnprintf(node->name, sizeof(node->name), grp->format,
1125 i + 1);
Henrik Rydberg3eba2bf2010-11-09 15:15:08 +00001126 node->sda.index = (grp->option << 16) | (i & 0xffff);
Henrik Rydberg9792dad2010-11-10 10:58:04 +00001127 node->sda.dev_attr.show = grp->show;
1128 node->sda.dev_attr.store = grp->store;
1129 attr = &node->sda.dev_attr.attr;
Henrik Rydberg9d1f8a402011-01-22 20:55:39 +01001130 sysfs_attr_init(attr);
Henrik Rydberg9792dad2010-11-10 10:58:04 +00001131 attr->name = node->name;
1132 attr->mode = S_IRUGO | (grp->store ? S_IWUSR : 0);
1133 ret = sysfs_create_file(&pdev->dev.kobj, attr);
1134 if (ret) {
1135 attr->name = NULL;
1136 goto out;
1137 }
1138 }
1139 }
1140
1141 return 0;
1142out:
1143 applesmc_destroy_nodes(groups);
1144 return ret;
1145}
1146
Bastien Nocera0c6cac72015-09-10 14:46:40 +02001147/* Create accelerometer resources */
Nicolas Boichat6f2fad72007-05-08 00:24:52 -07001148static int applesmc_create_accelerometer(void)
1149{
Dmitry Torokhovd5cf2b92007-09-26 00:01:35 -04001150 struct input_dev *idev;
Nicolas Boichat6f2fad72007-05-08 00:24:52 -07001151 int ret;
1152
Henrik Rydberg0b0b5df2010-11-09 15:15:09 +00001153 if (!smcreg.has_accelerometer)
1154 return 0;
1155
1156 ret = applesmc_create_nodes(accelerometer_group, 1);
Nicolas Boichat6f2fad72007-05-08 00:24:52 -07001157 if (ret)
1158 goto out;
1159
Dmitry Torokhovd5cf2b92007-09-26 00:01:35 -04001160 applesmc_idev = input_allocate_polled_device();
Nicolas Boichat6f2fad72007-05-08 00:24:52 -07001161 if (!applesmc_idev) {
1162 ret = -ENOMEM;
1163 goto out_sysfs;
1164 }
1165
Dmitry Torokhovd5cf2b92007-09-26 00:01:35 -04001166 applesmc_idev->poll = applesmc_idev_poll;
1167 applesmc_idev->poll_interval = APPLESMC_POLL_INTERVAL;
1168
Nicolas Boichat6f2fad72007-05-08 00:24:52 -07001169 /* initial calibrate for the input device */
1170 applesmc_calibrate();
1171
Dmitry Torokhovd5cf2b92007-09-26 00:01:35 -04001172 /* initialize the input device */
1173 idev = applesmc_idev->input;
1174 idev->name = "applesmc";
1175 idev->id.bustype = BUS_HOST;
1176 idev->dev.parent = &pdev->dev;
Jiri Slaby7b19ada2007-10-18 23:40:32 -07001177 idev->evbit[0] = BIT_MASK(EV_ABS);
Dmitry Torokhovd5cf2b92007-09-26 00:01:35 -04001178 input_set_abs_params(idev, ABS_X,
Nicolas Boichat6f2fad72007-05-08 00:24:52 -07001179 -256, 256, APPLESMC_INPUT_FUZZ, APPLESMC_INPUT_FLAT);
Dmitry Torokhovd5cf2b92007-09-26 00:01:35 -04001180 input_set_abs_params(idev, ABS_Y,
Nicolas Boichat6f2fad72007-05-08 00:24:52 -07001181 -256, 256, APPLESMC_INPUT_FUZZ, APPLESMC_INPUT_FLAT);
1182
Dmitry Torokhovd5cf2b92007-09-26 00:01:35 -04001183 ret = input_register_polled_device(applesmc_idev);
Nicolas Boichat6f2fad72007-05-08 00:24:52 -07001184 if (ret)
1185 goto out_idev;
1186
Nicolas Boichat6f2fad72007-05-08 00:24:52 -07001187 return 0;
1188
1189out_idev:
Dmitry Torokhovd5cf2b92007-09-26 00:01:35 -04001190 input_free_polled_device(applesmc_idev);
Nicolas Boichat6f2fad72007-05-08 00:24:52 -07001191
1192out_sysfs:
Henrik Rydberg0b0b5df2010-11-09 15:15:09 +00001193 applesmc_destroy_nodes(accelerometer_group);
Nicolas Boichat6f2fad72007-05-08 00:24:52 -07001194
1195out:
Joe Perches1ee7c712010-11-09 15:15:03 +00001196 pr_warn("driver init failed (ret=%d)!\n", ret);
Nicolas Boichat6f2fad72007-05-08 00:24:52 -07001197 return ret;
1198}
1199
Bastien Nocera0c6cac72015-09-10 14:46:40 +02001200/* Release all resources used by the accelerometer */
Nicolas Boichat6f2fad72007-05-08 00:24:52 -07001201static void applesmc_release_accelerometer(void)
1202{
Henrik Rydberg0b0b5df2010-11-09 15:15:09 +00001203 if (!smcreg.has_accelerometer)
1204 return;
Dmitry Torokhovd5cf2b92007-09-26 00:01:35 -04001205 input_unregister_polled_device(applesmc_idev);
1206 input_free_polled_device(applesmc_idev);
Henrik Rydberg0b0b5df2010-11-09 15:15:09 +00001207 applesmc_destroy_nodes(accelerometer_group);
Nicolas Boichat6f2fad72007-05-08 00:24:52 -07001208}
Henrik Rydberg0b0b5df2010-11-09 15:15:09 +00001209
1210static int applesmc_create_light_sensor(void)
1211{
1212 if (!smcreg.num_light_sensors)
1213 return 0;
1214 return applesmc_create_nodes(light_sensor_group, 1);
1215}
1216
1217static void applesmc_release_light_sensor(void)
1218{
1219 if (!smcreg.num_light_sensors)
1220 return;
1221 applesmc_destroy_nodes(light_sensor_group);
1222}
1223
1224static int applesmc_create_key_backlight(void)
1225{
1226 if (!smcreg.has_key_backlight)
1227 return 0;
1228 applesmc_led_wq = create_singlethread_workqueue("applesmc-led");
1229 if (!applesmc_led_wq)
1230 return -ENOMEM;
1231 return led_classdev_register(&pdev->dev, &applesmc_backlight);
1232}
1233
1234static void applesmc_release_key_backlight(void)
1235{
1236 if (!smcreg.has_key_backlight)
1237 return;
1238 led_classdev_unregister(&applesmc_backlight);
1239 destroy_workqueue(applesmc_led_wq);
1240}
1241
Henrik Rydberg40ef06f2010-11-10 10:58:05 +00001242static int applesmc_dmi_match(const struct dmi_system_id *id)
1243{
1244 return 1;
1245}
Nicolas Boichat6f2fad72007-05-08 00:24:52 -07001246
Guenter Roeck85ebfd32012-01-19 11:02:15 -08001247/*
1248 * Note that DMI_MATCH(...,"MacBook") will match "MacBookPro1,1".
1249 * So we need to put "Apple MacBook Pro" before "Apple MacBook".
1250 */
Christoph Hellwig6faadbb2017-09-14 11:59:30 +02001251static const struct dmi_system_id applesmc_whitelist[] __initconst = {
Henrik Rydbergf5274c92008-10-18 20:27:40 -07001252 { applesmc_dmi_match, "Apple MacBook Air", {
1253 DMI_MATCH(DMI_BOARD_VENDOR, "Apple"),
1254 DMI_MATCH(DMI_PRODUCT_NAME, "MacBookAir") },
Henrik Rydberg40ef06f2010-11-10 10:58:05 +00001255 },
Nicolas Boichat6f2fad72007-05-08 00:24:52 -07001256 { applesmc_dmi_match, "Apple MacBook Pro", {
Guenter Roeck2bfe8142010-11-10 10:42:21 -08001257 DMI_MATCH(DMI_BOARD_VENDOR, "Apple"),
1258 DMI_MATCH(DMI_PRODUCT_NAME, "MacBookPro") },
Henrik Rydberg40ef06f2010-11-10 10:58:05 +00001259 },
Riki Oktariantocd19ba12008-02-04 23:41:58 -08001260 { applesmc_dmi_match, "Apple MacBook", {
Guenter Roeck2bfe8142010-11-10 10:42:21 -08001261 DMI_MATCH(DMI_BOARD_VENDOR, "Apple"),
1262 DMI_MATCH(DMI_PRODUCT_NAME, "MacBook") },
Henrik Rydberg40ef06f2010-11-10 10:58:05 +00001263 },
Nicolas Boichat6f2fad72007-05-08 00:24:52 -07001264 { applesmc_dmi_match, "Apple Macmini", {
Guenter Roeck2bfe8142010-11-10 10:42:21 -08001265 DMI_MATCH(DMI_BOARD_VENDOR, "Apple"),
1266 DMI_MATCH(DMI_PRODUCT_NAME, "Macmini") },
Henrik Rydberg40ef06f2010-11-10 10:58:05 +00001267 },
Henrik Rydberg45a3a362008-11-19 15:36:42 -08001268 { applesmc_dmi_match, "Apple MacPro", {
1269 DMI_MATCH(DMI_BOARD_VENDOR, "Apple"),
1270 DMI_MATCH(DMI_PRODUCT_NAME, "MacPro") },
Henrik Rydberg40ef06f2010-11-10 10:58:05 +00001271 },
Roberto De Ioris9f86f282008-08-15 00:40:30 -07001272 { applesmc_dmi_match, "Apple iMac", {
Guenter Roeck2bfe8142010-11-10 10:42:21 -08001273 DMI_MATCH(DMI_BOARD_VENDOR, "Apple"),
1274 DMI_MATCH(DMI_PRODUCT_NAME, "iMac") },
Henrik Rydberg40ef06f2010-11-10 10:58:05 +00001275 },
Nicolas Boichat6f2fad72007-05-08 00:24:52 -07001276 { .ident = NULL }
1277};
1278
1279static int __init applesmc_init(void)
1280{
1281 int ret;
Nicolas Boichat6f2fad72007-05-08 00:24:52 -07001282
Nicolas Boichat6f2fad72007-05-08 00:24:52 -07001283 if (!dmi_check_system(applesmc_whitelist)) {
Joe Perches1ee7c712010-11-09 15:15:03 +00001284 pr_warn("supported laptop not found!\n");
Nicolas Boichat6f2fad72007-05-08 00:24:52 -07001285 ret = -ENODEV;
1286 goto out;
1287 }
1288
1289 if (!request_region(APPLESMC_DATA_PORT, APPLESMC_NR_PORTS,
1290 "applesmc")) {
1291 ret = -ENXIO;
1292 goto out;
1293 }
1294
1295 ret = platform_driver_register(&applesmc_driver);
1296 if (ret)
1297 goto out_region;
1298
Jean Delvareddfbf2a2007-05-08 20:27:04 -07001299 pdev = platform_device_register_simple("applesmc", APPLESMC_DATA_PORT,
1300 NULL, 0);
Nicolas Boichat6f2fad72007-05-08 00:24:52 -07001301 if (IS_ERR(pdev)) {
1302 ret = PTR_ERR(pdev);
1303 goto out_driver;
1304 }
1305
Henrik Rydberg58745832010-11-10 10:58:03 +00001306 /* create register cache */
1307 ret = applesmc_init_smcreg();
Nicolas Boichat6996abf2007-05-27 22:17:43 +02001308 if (ret)
1309 goto out_device;
Nicolas Boichatfa744192007-05-23 13:58:13 -07001310
Henrik Rydberg0b0b5df2010-11-09 15:15:09 +00001311 ret = applesmc_create_nodes(info_group, 1);
Henrik Rydberg58745832010-11-10 10:58:03 +00001312 if (ret)
1313 goto out_smcreg;
1314
Henrik Rydberg3eba2bf2010-11-09 15:15:08 +00001315 ret = applesmc_create_nodes(fan_group, smcreg.fan_count);
1316 if (ret)
1317 goto out_info;
Nicolas Boichat6f2fad72007-05-08 00:24:52 -07001318
Henrik Rydberge30bca12012-07-16 09:18:11 +02001319 ret = applesmc_create_nodes(temp_group, smcreg.index_count);
Henrik Rydberg9792dad2010-11-10 10:58:04 +00001320 if (ret)
1321 goto out_fans;
Nicolas Boichat6f2fad72007-05-08 00:24:52 -07001322
Henrik Rydberg0b0b5df2010-11-09 15:15:09 +00001323 ret = applesmc_create_accelerometer();
1324 if (ret)
1325 goto out_temperature;
Nicolas Boichat6f2fad72007-05-08 00:24:52 -07001326
Henrik Rydberg0b0b5df2010-11-09 15:15:09 +00001327 ret = applesmc_create_light_sensor();
1328 if (ret)
1329 goto out_accelerometer;
Nicolas Boichat6f2fad72007-05-08 00:24:52 -07001330
Henrik Rydberg0b0b5df2010-11-09 15:15:09 +00001331 ret = applesmc_create_key_backlight();
1332 if (ret)
1333 goto out_light_sysfs;
Nicolas Boichat6f2fad72007-05-08 00:24:52 -07001334
Tony Jones1beeffe2007-08-20 13:46:20 -07001335 hwmon_dev = hwmon_device_register(&pdev->dev);
1336 if (IS_ERR(hwmon_dev)) {
1337 ret = PTR_ERR(hwmon_dev);
Nicolas Boichat6f2fad72007-05-08 00:24:52 -07001338 goto out_light_ledclass;
1339 }
1340
Nicolas Boichat6f2fad72007-05-08 00:24:52 -07001341 return 0;
1342
1343out_light_ledclass:
Henrik Rydberg0b0b5df2010-11-09 15:15:09 +00001344 applesmc_release_key_backlight();
Nicolas Boichat6f2fad72007-05-08 00:24:52 -07001345out_light_sysfs:
Henrik Rydberg0b0b5df2010-11-09 15:15:09 +00001346 applesmc_release_light_sensor();
Nicolas Boichat6f2fad72007-05-08 00:24:52 -07001347out_accelerometer:
Henrik Rydberg0b0b5df2010-11-09 15:15:09 +00001348 applesmc_release_accelerometer();
Nicolas Boichat6f2fad72007-05-08 00:24:52 -07001349out_temperature:
Henrik Rydberg9792dad2010-11-10 10:58:04 +00001350 applesmc_destroy_nodes(temp_group);
Henrik Rydberg0559a532010-05-11 09:17:47 +02001351out_fans:
Henrik Rydberg3eba2bf2010-11-09 15:15:08 +00001352 applesmc_destroy_nodes(fan_group);
1353out_info:
Henrik Rydberg0b0b5df2010-11-09 15:15:09 +00001354 applesmc_destroy_nodes(info_group);
Henrik Rydberg58745832010-11-10 10:58:03 +00001355out_smcreg:
1356 applesmc_destroy_smcreg();
Nicolas Boichat6f2fad72007-05-08 00:24:52 -07001357out_device:
1358 platform_device_unregister(pdev);
1359out_driver:
1360 platform_driver_unregister(&applesmc_driver);
1361out_region:
1362 release_region(APPLESMC_DATA_PORT, APPLESMC_NR_PORTS);
1363out:
Joe Perches1ee7c712010-11-09 15:15:03 +00001364 pr_warn("driver init failed (ret=%d)!\n", ret);
Nicolas Boichat6f2fad72007-05-08 00:24:52 -07001365 return ret;
1366}
1367
1368static void __exit applesmc_exit(void)
1369{
Tony Jones1beeffe2007-08-20 13:46:20 -07001370 hwmon_device_unregister(hwmon_dev);
Henrik Rydberg0b0b5df2010-11-09 15:15:09 +00001371 applesmc_release_key_backlight();
1372 applesmc_release_light_sensor();
1373 applesmc_release_accelerometer();
Henrik Rydberg9792dad2010-11-10 10:58:04 +00001374 applesmc_destroy_nodes(temp_group);
Henrik Rydberg3eba2bf2010-11-09 15:15:08 +00001375 applesmc_destroy_nodes(fan_group);
Henrik Rydberg0b0b5df2010-11-09 15:15:09 +00001376 applesmc_destroy_nodes(info_group);
Henrik Rydberg58745832010-11-10 10:58:03 +00001377 applesmc_destroy_smcreg();
Nicolas Boichat6f2fad72007-05-08 00:24:52 -07001378 platform_device_unregister(pdev);
1379 platform_driver_unregister(&applesmc_driver);
1380 release_region(APPLESMC_DATA_PORT, APPLESMC_NR_PORTS);
Nicolas Boichat6f2fad72007-05-08 00:24:52 -07001381}
1382
1383module_init(applesmc_init);
1384module_exit(applesmc_exit);
1385
1386MODULE_AUTHOR("Nicolas Boichat");
1387MODULE_DESCRIPTION("Apple SMC");
1388MODULE_LICENSE("GPL v2");
Henrik Rydbergdc924ef2008-12-01 13:13:49 -08001389MODULE_DEVICE_TABLE(dmi, applesmc_whitelist);