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hwmon/applesmc: Simplify dependencies
[mirror_ubuntu-bionic-kernel.git] / drivers / hwmon / applesmc.c
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6f2fad74
NB		 1/*
2 * drivers/hwmon/applesmc.c - driver for Apple's SMC (accelerometer, temperature
3 * sensors, fan control, keyboard backlight control) used in Intel-based Apple
4 * computers.
5 *
6 * Copyright (C) 2007 Nicolas Boichat <nicolas@boichat.ch>
7 *
8 * Based on hdaps.c driver:
9 * Copyright (C) 2005 Robert Love <rml@novell.com>
10 * Copyright (C) 2005 Jesper Juhl <jesper.juhl@gmail.com>
11 *
12 * Fan control based on smcFanControl:
13 * Copyright (C) 2006 Hendrik Holtmann <holtmann@mac.com>
14 *
15 * This program is free software; you can redistribute it and/or modify it
16 * under the terms of the GNU General Public License v2 as published by the
17 * Free Software Foundation.
18 *
19 * This program is distributed in the hope that it will be useful, but WITHOUT
20 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
21 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
22 * more details.
23 *
24 * You should have received a copy of the GNU General Public License along with
25 * this program; if not, write to the Free Software Foundation, Inc.,
26 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
27 */
28
29#include <linux/delay.h>
30#include <linux/platform_device.h>
31#include <linux/input.h>
32#include <linux/kernel.h>
33#include <linux/module.h>
34#include <linux/timer.h>
35#include <linux/dmi.h>
36#include <linux/mutex.h>
37#include <linux/hwmon-sysfs.h>
38#include <asm/io.h>
39#include <linux/leds.h>
40#include <linux/hwmon.h>
41#include <linux/workqueue.h>
42
43/* data port used by Apple SMC */
44#define APPLESMC_DATA_PORT 0x300
45/* command/status port used by Apple SMC */
46#define APPLESMC_CMD_PORT 0x304
47
48#define APPLESMC_NR_PORTS 32 /* 0x300-0x31f */
49
50#define APPLESMC_MAX_DATA_LENGTH 32
51
52#define APPLESMC_STATUS_MASK 0x0f
53#define APPLESMC_READ_CMD 0x10
54#define APPLESMC_WRITE_CMD 0x11
55#define APPLESMC_GET_KEY_BY_INDEX_CMD 0x12
56#define APPLESMC_GET_KEY_TYPE_CMD 0x13
57
58#define KEY_COUNT_KEY "#KEY" /* r-o ui32 */
59
60#define LIGHT_SENSOR_LEFT_KEY "ALV0" /* r-o {alv (6 bytes) */
61#define LIGHT_SENSOR_RIGHT_KEY "ALV1" /* r-o {alv (6 bytes) */
62#define BACKLIGHT_KEY "LKSB" /* w-o {lkb (2 bytes) */
63
64#define CLAMSHELL_KEY "MSLD" /* r-o ui8 (unused) */
65
66#define MOTION_SENSOR_X_KEY "MO_X" /* r-o sp78 (2 bytes) */
67#define MOTION_SENSOR_Y_KEY "MO_Y" /* r-o sp78 (2 bytes) */
68#define MOTION_SENSOR_Z_KEY "MO_Z" /* r-o sp78 (2 bytes) */
69#define MOTION_SENSOR_KEY "MOCN" /* r/w ui16 */
70
71#define FANS_COUNT "FNum" /* r-o ui8 */
72#define FANS_MANUAL "FS! " /* r-w ui16 */
73#define FAN_ACTUAL_SPEED "F0Ac" /* r-o fpe2 (2 bytes) */
74#define FAN_MIN_SPEED "F0Mn" /* r-o fpe2 (2 bytes) */
75#define FAN_MAX_SPEED "F0Mx" /* r-o fpe2 (2 bytes) */
76#define FAN_SAFE_SPEED "F0Sf" /* r-o fpe2 (2 bytes) */
77#define FAN_TARGET_SPEED "F0Tg" /* r-w fpe2 (2 bytes) */
78#define FAN_POSITION "F0ID" /* r-o char[16] */
79
80/*
81 * Temperature sensors keys (sp78 - 2 bytes).
82 * First set for Macbook(Pro), second for Macmini.
83 */
84static const char* temperature_sensors_sets[][13] = {
85 { "TA0P", "TB0T", "TC0D", "TC0P", "TG0H", "TG0P", "TG0T", "Th0H",
86 "Th1H", "Tm0P", "Ts0P", "Ts1P", NULL },
87 { "TC0D", "TC0P", NULL }
88};
89
90/* List of keys used to read/write fan speeds */
91static const char* fan_speed_keys[] = {
92 FAN_ACTUAL_SPEED,
93 FAN_MIN_SPEED,
94 FAN_MAX_SPEED,
95 FAN_SAFE_SPEED,
96 FAN_TARGET_SPEED
97};
98
99#define INIT_TIMEOUT_MSECS 5000 /* wait up to 5s for device init ... */
100#define INIT_WAIT_MSECS 50 /* ... in 50ms increments */
101
102#define APPLESMC_POLL_PERIOD (HZ/20) /* poll for input every 1/20s */
103#define APPLESMC_INPUT_FUZZ 4 /* input event threshold */
104#define APPLESMC_INPUT_FLAT 4
105
106#define SENSOR_X 0
107#define SENSOR_Y 1
108#define SENSOR_Z 2
109
110/* Structure to be passed to DMI_MATCH function */
111struct dmi_match_data {
112/* Indicates whether this computer has an accelerometer. */
113 int accelerometer;
114/* Indicates whether this computer has light sensors and keyboard backlight. */
115 int light;
116/* Indicates which temperature sensors set to use. */
117 int temperature_set;
118};
119
120static const int debug;
121static struct platform_device *pdev;
122static s16 rest_x;
123static s16 rest_y;
124static struct timer_list applesmc_timer;
125static struct input_dev *applesmc_idev;
126static struct class_device *hwmon_class_dev;
127
128/* Indicates whether this computer has an accelerometer. */
129static unsigned int applesmc_accelerometer;
130
131/* Indicates whether this computer has light sensors and keyboard backlight. */
132static unsigned int applesmc_light;
133
134/* Indicates which temperature sensors set to use. */
135static unsigned int applesmc_temperature_set;
136
137static struct mutex applesmc_lock;
138
139/*
140 * Last index written to key_at_index sysfs file, and value to use for all other
141 * key_at_index_* sysfs files.
142 */
143static unsigned int key_at_index;
144
145static struct workqueue_struct *applesmc_led_wq;
146
147/*
148 * __wait_status - Wait up to 2ms for the status port to get a certain value
149 * (masked with 0x0f), returning zero if the value is obtained. Callers must
150 * hold applesmc_lock.
151 */
152static int __wait_status(u8 val)
153{
154 unsigned int i;
155
156 val = val & APPLESMC_STATUS_MASK;
157
158 for (i = 0; i < 200; i++) {
159 if ((inb(APPLESMC_CMD_PORT) & APPLESMC_STATUS_MASK) == val) {
160 if (debug)
161 printk(KERN_DEBUG
162 "Waited %d us for status %x\n",
163 i*10, val);
164 return 0;
165 }
166 udelay(10);
167 }
168
169 printk(KERN_WARNING "applesmc: wait status failed: %x != %x\n",
170 val, inb(APPLESMC_CMD_PORT));
171
172 return -EIO;
173}
174
175/*
176 * applesmc_read_key - reads len bytes from a given key, and put them in buffer.
177 * Returns zero on success or a negative error on failure. Callers must
178 * hold applesmc_lock.
179 */
180static int applesmc_read_key(const char* key, u8* buffer, u8 len)
181{
182 int i;
183
184 if (len > APPLESMC_MAX_DATA_LENGTH) {
185 printk(KERN_ERR "applesmc_read_key: cannot read more than "
186 "%d bytes\n", APPLESMC_MAX_DATA_LENGTH);
187 return -EINVAL;
188 }
189
190 outb(APPLESMC_READ_CMD, APPLESMC_CMD_PORT);
191 if (__wait_status(0x0c))
192 return -EIO;
193
194 for (i = 0; i < 4; i++) {
195 outb(key[i], APPLESMC_DATA_PORT);
196 if (__wait_status(0x04))
197 return -EIO;
198 }
199 if (debug)
200 printk(KERN_DEBUG "<%s", key);
201
202 outb(len, APPLESMC_DATA_PORT);
203 if (debug)
204 printk(KERN_DEBUG ">%x", len);
205
206 for (i = 0; i < len; i++) {
207 if (__wait_status(0x05))
208 return -EIO;
209 buffer[i] = inb(APPLESMC_DATA_PORT);
210 if (debug)
211 printk(KERN_DEBUG "<%x", buffer[i]);
212 }
213 if (debug)
214 printk(KERN_DEBUG "\n");
215
216 return 0;
217}
218
219/*
220 * applesmc_write_key - writes len bytes from buffer to a given key.
221 * Returns zero on success or a negative error on failure. Callers must
222 * hold applesmc_lock.
223 */
224static int applesmc_write_key(const char* key, u8* buffer, u8 len)
225{
226 int i;
227
228 if (len > APPLESMC_MAX_DATA_LENGTH) {
229 printk(KERN_ERR "applesmc_write_key: cannot write more than "
230 "%d bytes\n", APPLESMC_MAX_DATA_LENGTH);
231 return -EINVAL;
232 }
233
234 outb(APPLESMC_WRITE_CMD, APPLESMC_CMD_PORT);
235 if (__wait_status(0x0c))
236 return -EIO;
237
238 for (i = 0; i < 4; i++) {
239 outb(key[i], APPLESMC_DATA_PORT);
240 if (__wait_status(0x04))
241 return -EIO;
242 }
243
244 outb(len, APPLESMC_DATA_PORT);
245
246 for (i = 0; i < len; i++) {
247 if (__wait_status(0x04))
248 return -EIO;
249 outb(buffer[i], APPLESMC_DATA_PORT);
250 }
251
252 return 0;
253}
254
255/*
256 * applesmc_get_key_at_index - get key at index, and put the result in key
257 * (char[6]). Returns zero on success or a negative error on failure. Callers
258 * must hold applesmc_lock.
259 */
260static int applesmc_get_key_at_index(int index, char* key)
261{
262 int i;
263 u8 readkey[4];
264 readkey[0] = index >> 24;
265 readkey[1] = index >> 16;
266 readkey[2] = index >> 8;
267 readkey[3] = index;
268
269 outb(APPLESMC_GET_KEY_BY_INDEX_CMD, APPLESMC_CMD_PORT);
270 if (__wait_status(0x0c))
271 return -EIO;
272
273 for (i = 0; i < 4; i++) {
274 outb(readkey[i], APPLESMC_DATA_PORT);
275 if (__wait_status(0x04))
276 return -EIO;
277 }
278
279 outb(4, APPLESMC_DATA_PORT);
280
281 for (i = 0; i < 4; i++) {
282 if (__wait_status(0x05))
283 return -EIO;
284 key[i] = inb(APPLESMC_DATA_PORT);
285 }
286 key[4] = 0;
287
288 return 0;
289}
290
291/*
292 * applesmc_get_key_type - get key type, and put the result in type (char[6]).
293 * Returns zero on success or a negative error on failure. Callers must
294 * hold applesmc_lock.
295 */
296static int applesmc_get_key_type(char* key, char* type)
297{
298 int i;
299
300 outb(APPLESMC_GET_KEY_TYPE_CMD, APPLESMC_CMD_PORT);
301 if (__wait_status(0x0c))
302 return -EIO;
303
304 for (i = 0; i < 4; i++) {
305 outb(key[i], APPLESMC_DATA_PORT);
306 if (__wait_status(0x04))
307 return -EIO;
308 }
309
310 outb(5, APPLESMC_DATA_PORT);
311
312 for (i = 0; i < 6; i++) {
313 if (__wait_status(0x05))
314 return -EIO;
315 type[i] = inb(APPLESMC_DATA_PORT);
316 }
317 type[5] = 0;
318
319 return 0;
320}
321
322/*
323 * applesmc_read_motion_sensor - Read motion sensor (X, Y or Z). Callers must
324 * hold applesmc_lock.
325 */
326static int applesmc_read_motion_sensor(int index, s16* value)
327{
328 u8 buffer[2];
329 int ret;
330
331 switch (index) {
332 case SENSOR_X:
333 ret = applesmc_read_key(MOTION_SENSOR_X_KEY, buffer, 2);
334 break;
335 case SENSOR_Y:
336 ret = applesmc_read_key(MOTION_SENSOR_Y_KEY, buffer, 2);
337 break;
338 case SENSOR_Z:
339 ret = applesmc_read_key(MOTION_SENSOR_Z_KEY, buffer, 2);
340 break;
341 default:
342 ret = -EINVAL;
343 }
344
345 *value = ((s16)buffer[0] << 8) | buffer[1];
346
347 return ret;
348}
349
350/*
351 * applesmc_device_init - initialize the accelerometer. Returns zero on success
352 * and negative error code on failure. Can sleep.
353 */
354static int applesmc_device_init(void)
355{
356 int total, ret = -ENXIO;
357 u8 buffer[2];
358
359 if (!applesmc_accelerometer)
360 return 0;
361
362 mutex_lock(&applesmc_lock);
363
364 for (total = INIT_TIMEOUT_MSECS; total > 0; total -= INIT_WAIT_MSECS) {
365 if (debug)
366 printk(KERN_DEBUG "applesmc try %d\n", total);
367 if (!applesmc_read_key(MOTION_SENSOR_KEY, buffer, 2) &&
368 (buffer[0] != 0x00 || buffer[1] != 0x00)) {
369 if (total == INIT_TIMEOUT_MSECS) {
370 printk(KERN_DEBUG "applesmc: device has"
371 " already been initialized"
372 " (0x%02x, 0x%02x).\n",
373 buffer[0], buffer[1]);
374 } else {
375 printk(KERN_DEBUG "applesmc: device"
376 " successfully initialized"
377 " (0x%02x, 0x%02x).\n",
378 buffer[0], buffer[1]);
379 }
380 ret = 0;
381 goto out;
382 }
383 buffer[0] = 0xe0;
384 buffer[1] = 0x00;
385 applesmc_write_key(MOTION_SENSOR_KEY, buffer, 2);
386 msleep(INIT_WAIT_MSECS);
387 }
388
389 printk(KERN_WARNING "applesmc: failed to init the device\n");
390
391out:
392 mutex_unlock(&applesmc_lock);
393 return ret;
394}
395
396/*
397 * applesmc_get_fan_count - get the number of fans. Callers must NOT hold
398 * applesmc_lock.
399 */
400static int applesmc_get_fan_count(void)
401{
402 int ret;
403 u8 buffer[1];
404
405 mutex_lock(&applesmc_lock);
406
407 ret = applesmc_read_key(FANS_COUNT, buffer, 1);
408
409 mutex_unlock(&applesmc_lock);
410 if (ret)
411 return ret;
412 else
413 return buffer[0];
414}
415
416/* Device model stuff */
417static int applesmc_probe(struct platform_device *dev)
418{
419 int ret;
420
421 ret = applesmc_device_init();
422 if (ret)
423 return ret;
424
425 printk(KERN_INFO "applesmc: device successfully initialized.\n");
426 return 0;
427}
428
429static int applesmc_resume(struct platform_device *dev)
430{
431 return applesmc_device_init();
432}
433
434static struct platform_driver applesmc_driver = {
435 .probe = applesmc_probe,
436 .resume = applesmc_resume,
437 .driver = {
438 .name = "applesmc",
439 .owner = THIS_MODULE,
440 },
441};
442
443/*
444 * applesmc_calibrate - Set our "resting" values. Callers must
445 * hold applesmc_lock.
446 */
447static void applesmc_calibrate(void)
448{
449 applesmc_read_motion_sensor(SENSOR_X, &rest_x);
450 applesmc_read_motion_sensor(SENSOR_Y, &rest_y);
451 rest_x = -rest_x;
452}
453
454static int applesmc_idev_open(struct input_dev *dev)
455{
456 add_timer(&applesmc_timer);
457
458 return 0;
459}
460
461static void applesmc_idev_close(struct input_dev *dev)
462{
463 del_timer_sync(&applesmc_timer);
464}
465
466static void applesmc_idev_poll(unsigned long unused)
467{
468 s16 x, y;
469
470 /* Cannot sleep. Try nonblockingly. If we fail, try again later. */
471 if (!mutex_trylock(&applesmc_lock)) {
472 mod_timer(&applesmc_timer, jiffies + APPLESMC_POLL_PERIOD);
473 return;
474 }
475
476 if (applesmc_read_motion_sensor(SENSOR_X, &x))
477 goto out;
478 if (applesmc_read_motion_sensor(SENSOR_Y, &y))
479 goto out;
480
481 x = -x;
482 input_report_abs(applesmc_idev, ABS_X, x - rest_x);
483 input_report_abs(applesmc_idev, ABS_Y, y - rest_y);
484 input_sync(applesmc_idev);
485
486out:
487 mod_timer(&applesmc_timer, jiffies + APPLESMC_POLL_PERIOD);
488
489 mutex_unlock(&applesmc_lock);
490}
491
492/* Sysfs Files */
493
fa74419b
NB		 494static ssize_t applesmc_name_show(struct device *dev,
495 struct device_attribute *attr, char *buf)
496{
497 return snprintf(buf, PAGE_SIZE, "applesmc\n");
498}
499
6f2fad74
NB		 500static ssize_t applesmc_position_show(struct device *dev,
501 struct device_attribute *attr, char *buf)
502{
503 int ret;
504 s16 x, y, z;
505
506 mutex_lock(&applesmc_lock);
507
508 ret = applesmc_read_motion_sensor(SENSOR_X, &x);
509 if (ret)
510 goto out;
511 ret = applesmc_read_motion_sensor(SENSOR_Y, &y);
512 if (ret)
513 goto out;
514 ret = applesmc_read_motion_sensor(SENSOR_Z, &z);
515 if (ret)
516 goto out;
517
518out:
519 mutex_unlock(&applesmc_lock);
520 if (ret)
521 return ret;
522 else
523 return snprintf(buf, PAGE_SIZE, "(%d,%d,%d)\n", x, y, z);
524}
525
526static ssize_t applesmc_light_show(struct device *dev,
527 struct device_attribute *attr, char *sysfsbuf)
528{
529 int ret;
530 u8 left = 0, right = 0;
531 u8 buffer[6];
532
533 mutex_lock(&applesmc_lock);
534
535 ret = applesmc_read_key(LIGHT_SENSOR_LEFT_KEY, buffer, 6);
536 left = buffer[2];
537 if (ret)
538 goto out;
539 ret = applesmc_read_key(LIGHT_SENSOR_RIGHT_KEY, buffer, 6);
540 right = buffer[2];
541
542out:
543 mutex_unlock(&applesmc_lock);
544 if (ret)
545 return ret;
546 else
547 return snprintf(sysfsbuf, PAGE_SIZE, "(%d,%d)\n", left, right);
548}
549
550/* Displays degree Celsius * 1000 */
551static ssize_t applesmc_show_temperature(struct device *dev,
552 struct device_attribute *devattr, char *sysfsbuf)
553{
554 int ret;
555 u8 buffer[2];
556 unsigned int temp;
557 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
558 const char* key =
559 temperature_sensors_sets[applesmc_temperature_set][attr->index];
560
561 mutex_lock(&applesmc_lock);
562
563 ret = applesmc_read_key(key, buffer, 2);
564 temp = buffer[0]*1000;
565 temp += (buffer[1] >> 6) * 250;
566
567 mutex_unlock(&applesmc_lock);
568
569 if (ret)
570 return ret;
571 else
572 return snprintf(sysfsbuf, PAGE_SIZE, "%u\n", temp);
573}
574
575static ssize_t applesmc_show_fan_speed(struct device *dev,
576 struct device_attribute *attr, char *sysfsbuf)
577{
578 int ret;
579 unsigned int speed = 0;
580 char newkey[5];
581 u8 buffer[2];
582 struct sensor_device_attribute_2 *sensor_attr =
583 to_sensor_dev_attr_2(attr);
584
585 newkey[0] = fan_speed_keys[sensor_attr->nr][0];
586 newkey[1] = '0' + sensor_attr->index;
587 newkey[2] = fan_speed_keys[sensor_attr->nr][2];
588 newkey[3] = fan_speed_keys[sensor_attr->nr][3];
589 newkey[4] = 0;
590
591 mutex_lock(&applesmc_lock);
592
593 ret = applesmc_read_key(newkey, buffer, 2);
594 speed = ((buffer[0] << 8 | buffer[1]) >> 2);
595
596 mutex_unlock(&applesmc_lock);
597 if (ret)
598 return ret;
599 else
600 return snprintf(sysfsbuf, PAGE_SIZE, "%u\n", speed);
601}
602
603static ssize_t applesmc_store_fan_speed(struct device *dev,
604 struct device_attribute *attr,
605 const char *sysfsbuf, size_t count)
606{
607 int ret;
608 u32 speed;
609 char newkey[5];
610 u8 buffer[2];
611 struct sensor_device_attribute_2 *sensor_attr =
612 to_sensor_dev_attr_2(attr);
613
614 speed = simple_strtoul(sysfsbuf, NULL, 10);
615
616 if (speed > 0x4000) /* Bigger than a 14-bit value */
617 return -EINVAL;
618
619 newkey[0] = fan_speed_keys[sensor_attr->nr][0];
620 newkey[1] = '0' + sensor_attr->index;
621 newkey[2] = fan_speed_keys[sensor_attr->nr][2];
622 newkey[3] = fan_speed_keys[sensor_attr->nr][3];
623 newkey[4] = 0;
624
625 mutex_lock(&applesmc_lock);
626
627 buffer[0] = (speed >> 6) & 0xff;
628 buffer[1] = (speed << 2) & 0xff;
629 ret = applesmc_write_key(newkey, buffer, 2);
630
631 mutex_unlock(&applesmc_lock);
632 if (ret)
633 return ret;
634 else
635 return count;
636}
637
638static ssize_t applesmc_show_fan_manual(struct device *dev,
639 struct device_attribute *devattr, char *sysfsbuf)
640{
641 int ret;
642 u16 manual = 0;
643 u8 buffer[2];
644 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
645
646 mutex_lock(&applesmc_lock);
647
648 ret = applesmc_read_key(FANS_MANUAL, buffer, 2);
649 manual = ((buffer[0] << 8 | buffer[1]) >> attr->index) & 0x01;
650
651 mutex_unlock(&applesmc_lock);
652 if (ret)
653 return ret;
654 else
655 return snprintf(sysfsbuf, PAGE_SIZE, "%d\n", manual);
656}
657
658static ssize_t applesmc_store_fan_manual(struct device *dev,
659 struct device_attribute *devattr,
660 const char *sysfsbuf, size_t count)
661{
662 int ret;
663 u8 buffer[2];
664 u32 input;
665 u16 val;
666 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
667
668 input = simple_strtoul(sysfsbuf, NULL, 10);
669
670 mutex_lock(&applesmc_lock);
671
672 ret = applesmc_read_key(FANS_MANUAL, buffer, 2);
673 val = (buffer[0] << 8 | buffer[1]);
674 if (ret)
675 goto out;
676
677 if (input)
678 val = val | (0x01 << attr->index);
679 else
680 val = val & ~(0x01 << attr->index);
681
682 buffer[0] = (val >> 8) & 0xFF;
683 buffer[1] = val & 0xFF;
684
685 ret = applesmc_write_key(FANS_MANUAL, buffer, 2);
686
687out:
688 mutex_unlock(&applesmc_lock);
689 if (ret)
690 return ret;
691 else
692 return count;
693}
694
695static ssize_t applesmc_show_fan_position(struct device *dev,
696 struct device_attribute *attr, char *sysfsbuf)
697{
698 int ret;
699 char newkey[5];
700 u8 buffer[17];
701 struct sensor_device_attribute_2 *sensor_attr =
702 to_sensor_dev_attr_2(attr);
703
704 newkey[0] = FAN_POSITION[0];
705 newkey[1] = '0' + sensor_attr->index;
706 newkey[2] = FAN_POSITION[2];
707 newkey[3] = FAN_POSITION[3];
708 newkey[4] = 0;
709
710 mutex_lock(&applesmc_lock);
711
712 ret = applesmc_read_key(newkey, buffer, 16);
713 buffer[16] = 0;
714
715 mutex_unlock(&applesmc_lock);
716 if (ret)
717 return ret;
718 else
719 return snprintf(sysfsbuf, PAGE_SIZE, "%s\n", buffer+4);
720}
721
722static ssize_t applesmc_calibrate_show(struct device *dev,
723 struct device_attribute *attr, char *sysfsbuf)
724{
725 return snprintf(sysfsbuf, PAGE_SIZE, "(%d,%d)\n", rest_x, rest_y);
726}
727
728static ssize_t applesmc_calibrate_store(struct device *dev,
729 struct device_attribute *attr, const char *sysfsbuf, size_t count)
730{
731 mutex_lock(&applesmc_lock);
732 applesmc_calibrate();
733 mutex_unlock(&applesmc_lock);
734
735 return count;
736}
737
738/* Store the next backlight value to be written by the work */
739static unsigned int backlight_value;
740
741static void applesmc_backlight_set(struct work_struct *work)
742{
743 u8 buffer[2];
744
745 mutex_lock(&applesmc_lock);
746 buffer[0] = backlight_value;
747 buffer[1] = 0x00;
748 applesmc_write_key(BACKLIGHT_KEY, buffer, 2);
749 mutex_unlock(&applesmc_lock);
750}
751static DECLARE_WORK(backlight_work, &applesmc_backlight_set);
752
753static void applesmc_brightness_set(struct led_classdev *led_cdev,
754 enum led_brightness value)
755{
756 int ret;
757
758 backlight_value = value;
759 ret = queue_work(applesmc_led_wq, &backlight_work);
760
761 if (debug && (!ret))
762 printk(KERN_DEBUG "applesmc: work was already on the queue.\n");
763}
764
765static ssize_t applesmc_key_count_show(struct device *dev,
766 struct device_attribute *attr, char *sysfsbuf)
767{
768 int ret;
769 u8 buffer[4];
770 u32 count;
771
772 mutex_lock(&applesmc_lock);
773
774 ret = applesmc_read_key(KEY_COUNT_KEY, buffer, 4);
775 count = ((u32)buffer[0]<<24) + ((u32)buffer[1]<<16) +
776 ((u32)buffer[2]<<8) + buffer[3];
777
778 mutex_unlock(&applesmc_lock);
779 if (ret)
780 return ret;
781 else
782 return snprintf(sysfsbuf, PAGE_SIZE, "%d\n", count);
783}
784
785static ssize_t applesmc_key_at_index_read_show(struct device *dev,
786 struct device_attribute *attr, char *sysfsbuf)
787{
788 char key[5];
789 char info[6];
790 int ret;
791
792 mutex_lock(&applesmc_lock);
793
794 ret = applesmc_get_key_at_index(key_at_index, key);
795
796 if (ret || !key[0]) {
797 mutex_unlock(&applesmc_lock);
798
799 return -EINVAL;
800 }
801
802 ret = applesmc_get_key_type(key, info);
803
804 if (ret) {
805 mutex_unlock(&applesmc_lock);
806
807 return ret;
808 }
809
810 /*
811 * info[0] maximum value (APPLESMC_MAX_DATA_LENGTH) is much lower than
812 * PAGE_SIZE, so we don't need any checks before writing to sysfsbuf.
813 */
814 ret = applesmc_read_key(key, sysfsbuf, info[0]);
815
816 mutex_unlock(&applesmc_lock);
817
818 if (!ret) {
819 return info[0];
820 }
821 else {
822 return ret;
823 }
824}
825
826static ssize_t applesmc_key_at_index_data_length_show(struct device *dev,
827 struct device_attribute *attr, char *sysfsbuf)
828{
829 char key[5];
830 char info[6];
831 int ret;
832
833 mutex_lock(&applesmc_lock);
834
835 ret = applesmc_get_key_at_index(key_at_index, key);
836
837 if (ret || !key[0]) {
838 mutex_unlock(&applesmc_lock);
839
840 return -EINVAL;
841 }
842
843 ret = applesmc_get_key_type(key, info);
844
845 mutex_unlock(&applesmc_lock);
846
847 if (!ret)
848 return snprintf(sysfsbuf, PAGE_SIZE, "%d\n", info[0]);
849 else
850 return ret;
851}
852
853static ssize_t applesmc_key_at_index_type_show(struct device *dev,
854 struct device_attribute *attr, char *sysfsbuf)
855{
856 char key[5];
857 char info[6];
858 int ret;
859
860 mutex_lock(&applesmc_lock);
861
862 ret = applesmc_get_key_at_index(key_at_index, key);
863
864 if (ret || !key[0]) {
865 mutex_unlock(&applesmc_lock);
866
867 return -EINVAL;
868 }
869
870 ret = applesmc_get_key_type(key, info);
871
872 mutex_unlock(&applesmc_lock);
873
874 if (!ret)
875 return snprintf(sysfsbuf, PAGE_SIZE, "%s\n", info+1);
876 else
877 return ret;
878}
879
880static ssize_t applesmc_key_at_index_name_show(struct device *dev,
881 struct device_attribute *attr, char *sysfsbuf)
882{
883 char key[5];
884 int ret;
885
886 mutex_lock(&applesmc_lock);
887
888 ret = applesmc_get_key_at_index(key_at_index, key);
889
890 mutex_unlock(&applesmc_lock);
891
892 if (!ret && key[0])
893 return snprintf(sysfsbuf, PAGE_SIZE, "%s\n", key);
894 else
895 return -EINVAL;
896}
897
898static ssize_t applesmc_key_at_index_show(struct device *dev,
899 struct device_attribute *attr, char *sysfsbuf)
900{
901 return snprintf(sysfsbuf, PAGE_SIZE, "%d\n", key_at_index);
902}
903
904static ssize_t applesmc_key_at_index_store(struct device *dev,
905 struct device_attribute *attr, const char *sysfsbuf, size_t count)
906{
907 mutex_lock(&applesmc_lock);
908
909 key_at_index = simple_strtoul(sysfsbuf, NULL, 10);
910
911 mutex_unlock(&applesmc_lock);
912
913 return count;
914}
915
916static struct led_classdev applesmc_backlight = {
917 .name = "smc:kbd_backlight",
918 .default_trigger = "nand-disk",
919 .brightness_set = applesmc_brightness_set,
920};
921
fa74419b
NB		 922static DEVICE_ATTR(name, 0444, applesmc_name_show, NULL);
923
6f2fad74
NB		 924static DEVICE_ATTR(position, 0444, applesmc_position_show, NULL);
925static DEVICE_ATTR(calibrate, 0644,
926 applesmc_calibrate_show, applesmc_calibrate_store);
927
928static struct attribute *accelerometer_attributes[] = {
929 &dev_attr_position.attr,
930 &dev_attr_calibrate.attr,
931 NULL
932};
933
934static const struct attribute_group accelerometer_attributes_group =
935 { .attrs = accelerometer_attributes };
936
937static DEVICE_ATTR(light, 0444, applesmc_light_show, NULL);
938
939static DEVICE_ATTR(key_count, 0444, applesmc_key_count_show, NULL);
940static DEVICE_ATTR(key_at_index, 0644,
941 applesmc_key_at_index_show, applesmc_key_at_index_store);
942static DEVICE_ATTR(key_at_index_name, 0444,
943 applesmc_key_at_index_name_show, NULL);
944static DEVICE_ATTR(key_at_index_type, 0444,
945 applesmc_key_at_index_type_show, NULL);
946static DEVICE_ATTR(key_at_index_data_length, 0444,
947 applesmc_key_at_index_data_length_show, NULL);
948static DEVICE_ATTR(key_at_index_data, 0444,
949 applesmc_key_at_index_read_show, NULL);
950
951static struct attribute *key_enumeration_attributes[] = {
952 &dev_attr_key_count.attr,
953 &dev_attr_key_at_index.attr,
954 &dev_attr_key_at_index_name.attr,
955 &dev_attr_key_at_index_type.attr,
956 &dev_attr_key_at_index_data_length.attr,
957 &dev_attr_key_at_index_data.attr,
958 NULL
959};
960
961static const struct attribute_group key_enumeration_group =
962 { .attrs = key_enumeration_attributes };
963
964/*
965 * Macro defining SENSOR_DEVICE_ATTR for a fan sysfs entries.
966 * - show actual speed
967 * - show/store minimum speed
968 * - show maximum speed
969 * - show safe speed
970 * - show/store target speed
971 * - show/store manual mode
972 */
973#define sysfs_fan_speeds_offset(offset) \
974static SENSOR_DEVICE_ATTR_2(fan##offset##_input, S_IRUGO, \
975 applesmc_show_fan_speed, NULL, 0, offset-1); \
976\
977static SENSOR_DEVICE_ATTR_2(fan##offset##_min, S_IRUGO | S_IWUSR, \
978 applesmc_show_fan_speed, applesmc_store_fan_speed, 1, offset-1); \
979\
980static SENSOR_DEVICE_ATTR_2(fan##offset##_max, S_IRUGO, \
981 applesmc_show_fan_speed, NULL, 2, offset-1); \
982\
983static SENSOR_DEVICE_ATTR_2(fan##offset##_safe, S_IRUGO, \
984 applesmc_show_fan_speed, NULL, 3, offset-1); \
985\
986static SENSOR_DEVICE_ATTR_2(fan##offset##_output, S_IRUGO | S_IWUSR, \
987 applesmc_show_fan_speed, applesmc_store_fan_speed, 4, offset-1); \
988\
989static SENSOR_DEVICE_ATTR(fan##offset##_manual, S_IRUGO | S_IWUSR, \
990 applesmc_show_fan_manual, applesmc_store_fan_manual, offset-1); \
991\
da4e8ca3 992static SENSOR_DEVICE_ATTR(fan##offset##_label, S_IRUGO, \
6f2fad74
NB		 993 applesmc_show_fan_position, NULL, offset-1); \
994\
995static struct attribute *fan##offset##_attributes[] = { \
996 &sensor_dev_attr_fan##offset##_input.dev_attr.attr, \
997 &sensor_dev_attr_fan##offset##_min.dev_attr.attr, \
998 &sensor_dev_attr_fan##offset##_max.dev_attr.attr, \
999 &sensor_dev_attr_fan##offset##_safe.dev_attr.attr, \
1000 &sensor_dev_attr_fan##offset##_output.dev_attr.attr, \
1001 &sensor_dev_attr_fan##offset##_manual.dev_attr.attr, \
da4e8ca3 1002 &sensor_dev_attr_fan##offset##_label.dev_attr.attr, \
6f2fad74
NB		 1003 NULL \
1004};
1005
1006/*
1007 * Create the needed functions for each fan using the macro defined above
1008 * (2 fans are supported)
1009 */
1010sysfs_fan_speeds_offset(1);
1011sysfs_fan_speeds_offset(2);
1012
1013static const struct attribute_group fan_attribute_groups[] = {
1014 { .attrs = fan1_attributes },
1015 { .attrs = fan2_attributes }
1016};
1017
1018/*
1019 * Temperature sensors sysfs entries.
1020 */
1021static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO,
1022 applesmc_show_temperature, NULL, 0);
1023static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO,
1024 applesmc_show_temperature, NULL, 1);
1025static SENSOR_DEVICE_ATTR(temp3_input, S_IRUGO,
1026 applesmc_show_temperature, NULL, 2);
1027static SENSOR_DEVICE_ATTR(temp4_input, S_IRUGO,
1028 applesmc_show_temperature, NULL, 3);
1029static SENSOR_DEVICE_ATTR(temp5_input, S_IRUGO,
1030 applesmc_show_temperature, NULL, 4);
1031static SENSOR_DEVICE_ATTR(temp6_input, S_IRUGO,
1032 applesmc_show_temperature, NULL, 5);
1033static SENSOR_DEVICE_ATTR(temp7_input, S_IRUGO,
1034 applesmc_show_temperature, NULL, 6);
1035static SENSOR_DEVICE_ATTR(temp8_input, S_IRUGO,
1036 applesmc_show_temperature, NULL, 7);
1037static SENSOR_DEVICE_ATTR(temp9_input, S_IRUGO,
1038 applesmc_show_temperature, NULL, 8);
1039static SENSOR_DEVICE_ATTR(temp10_input, S_IRUGO,
1040 applesmc_show_temperature, NULL, 9);
1041static SENSOR_DEVICE_ATTR(temp11_input, S_IRUGO,
1042 applesmc_show_temperature, NULL, 10);
1043static SENSOR_DEVICE_ATTR(temp12_input, S_IRUGO,
1044 applesmc_show_temperature, NULL, 11);
1045
1046static struct attribute *temperature_attributes[] = {
1047 &sensor_dev_attr_temp1_input.dev_attr.attr,
1048 &sensor_dev_attr_temp2_input.dev_attr.attr,
1049 &sensor_dev_attr_temp3_input.dev_attr.attr,
1050 &sensor_dev_attr_temp4_input.dev_attr.attr,
1051 &sensor_dev_attr_temp5_input.dev_attr.attr,
1052 &sensor_dev_attr_temp6_input.dev_attr.attr,
1053 &sensor_dev_attr_temp7_input.dev_attr.attr,
1054 &sensor_dev_attr_temp8_input.dev_attr.attr,
1055 &sensor_dev_attr_temp9_input.dev_attr.attr,
1056 &sensor_dev_attr_temp10_input.dev_attr.attr,
1057 &sensor_dev_attr_temp11_input.dev_attr.attr,
1058 &sensor_dev_attr_temp12_input.dev_attr.attr,
1059 NULL
1060};
1061
1062static const struct attribute_group temperature_attributes_group =
1063 { .attrs = temperature_attributes };
1064
1065/* Module stuff */
1066
1067/*
1068 * applesmc_dmi_match - found a match. return one, short-circuiting the hunt.
1069 */
1070static int applesmc_dmi_match(struct dmi_system_id *id)
1071{
1072 int i = 0;
1073 struct dmi_match_data* dmi_data = id->driver_data;
1074 printk(KERN_INFO "applesmc: %s detected:\n", id->ident);
1075 applesmc_accelerometer = dmi_data->accelerometer;
1076 printk(KERN_INFO "applesmc: - Model %s accelerometer\n",
1077 applesmc_accelerometer ? "with" : "without");
1078 applesmc_light = dmi_data->light;
1079 printk(KERN_INFO "applesmc: - Model %s light sensors and backlight\n",
1080 applesmc_light ? "with" : "without");
1081
1082 applesmc_temperature_set = dmi_data->temperature_set;
1083 while (temperature_sensors_sets[applesmc_temperature_set][i] != NULL)
1084 i++;
1085 printk(KERN_INFO "applesmc: - Model with %d temperature sensors\n", i);
1086 return 1;
1087}
1088
1089/* Create accelerometer ressources */
1090static int applesmc_create_accelerometer(void)
1091{
1092 int ret;
1093
1094 ret = sysfs_create_group(&pdev->dev.kobj,
1095 &accelerometer_attributes_group);
1096 if (ret)
1097 goto out;
1098
1099 applesmc_idev = input_allocate_device();
1100 if (!applesmc_idev) {
1101 ret = -ENOMEM;
1102 goto out_sysfs;
1103 }
1104
1105 /* initial calibrate for the input device */
1106 applesmc_calibrate();
1107
1108 /* initialize the input class */
1109 applesmc_idev->name = "applesmc";
1110 applesmc_idev->id.bustype = BUS_HOST;
c5ddb547 1111 applesmc_idev->dev.parent = &pdev->dev;
6f2fad74
NB		 1112 applesmc_idev->evbit[0] = BIT(EV_ABS);
1113 applesmc_idev->open = applesmc_idev_open;
1114 applesmc_idev->close = applesmc_idev_close;
1115 input_set_abs_params(applesmc_idev, ABS_X,
1116 -256, 256, APPLESMC_INPUT_FUZZ, APPLESMC_INPUT_FLAT);
1117 input_set_abs_params(applesmc_idev, ABS_Y,
1118 -256, 256, APPLESMC_INPUT_FUZZ, APPLESMC_INPUT_FLAT);
1119
1120 ret = input_register_device(applesmc_idev);
1121 if (ret)
1122 goto out_idev;
1123
1124 /* start up our timer for the input device */
1125 init_timer(&applesmc_timer);
1126 applesmc_timer.function = applesmc_idev_poll;
1127 applesmc_timer.expires = jiffies + APPLESMC_POLL_PERIOD;
1128
1129 return 0;
1130
1131out_idev:
1132 input_free_device(applesmc_idev);
1133
1134out_sysfs:
1135 sysfs_remove_group(&pdev->dev.kobj, &accelerometer_attributes_group);
1136
1137out:
1138 printk(KERN_WARNING "applesmc: driver init failed (ret=%d)!\n", ret);
1139 return ret;
1140}
1141
1142/* Release all ressources used by the accelerometer */
1143static void applesmc_release_accelerometer(void)
1144{
1145 del_timer_sync(&applesmc_timer);
1146 input_unregister_device(applesmc_idev);
1147 sysfs_remove_group(&pdev->dev.kobj, &accelerometer_attributes_group);
1148}
1149
1150static __initdata struct dmi_match_data applesmc_dmi_data[] = {
1151/* MacBook Pro: accelerometer, backlight and temperature set 0 */
1152 { .accelerometer = 1, .light = 1, .temperature_set = 0 },
1153/* MacBook: accelerometer and temperature set 0 */
1154 { .accelerometer = 1, .light = 0, .temperature_set = 0 },
1155/* MacBook: temperature set 1 */
1156 { .accelerometer = 0, .light = 0, .temperature_set = 1 }
1157};
1158
1159/* Note that DMI_MATCH(...,"MacBook") will match "MacBookPro1,1".
1160 * So we need to put "Apple MacBook Pro" before "Apple MacBook". */
1161static __initdata struct dmi_system_id applesmc_whitelist[] = {
1162 { applesmc_dmi_match, "Apple MacBook Pro", {
1163 DMI_MATCH(DMI_BOARD_VENDOR,"Apple"),
1164 DMI_MATCH(DMI_PRODUCT_NAME,"MacBookPro") },
1165 (void*)&applesmc_dmi_data[0]},
1166 { applesmc_dmi_match, "Apple MacBook", {
1167 DMI_MATCH(DMI_BOARD_VENDOR,"Apple"),
1168 DMI_MATCH(DMI_PRODUCT_NAME,"MacBook") },
1169 (void*)&applesmc_dmi_data[1]},
1170 { applesmc_dmi_match, "Apple Macmini", {
1171 DMI_MATCH(DMI_BOARD_VENDOR,"Apple"),
1172 DMI_MATCH(DMI_PRODUCT_NAME,"Macmini") },
1173 (void*)&applesmc_dmi_data[2]},
1174 { .ident = NULL }
1175};
1176
1177static int __init applesmc_init(void)
1178{
1179 int ret;
1180 int count;
1181 int i;
1182
1183 mutex_init(&applesmc_lock);
1184
1185 if (!dmi_check_system(applesmc_whitelist)) {
1186 printk(KERN_WARNING "applesmc: supported laptop not found!\n");
1187 ret = -ENODEV;
1188 goto out;
1189 }
1190
1191 if (!request_region(APPLESMC_DATA_PORT, APPLESMC_NR_PORTS,
1192 "applesmc")) {
1193 ret = -ENXIO;
1194 goto out;
1195 }
1196
1197 ret = platform_driver_register(&applesmc_driver);
1198 if (ret)
1199 goto out_region;
1200
ddfbf2af
JD		 1201 pdev = platform_device_register_simple("applesmc", APPLESMC_DATA_PORT,
1202 NULL, 0);
6f2fad74
NB		 1203 if (IS_ERR(pdev)) {
1204 ret = PTR_ERR(pdev);
1205 goto out_driver;
1206 }
1207
fa74419b
NB		 1208 ret = sysfs_create_file(&pdev->dev.kobj, &dev_attr_name.attr);
1209
6f2fad74
NB		 1210 /* Create key enumeration sysfs files */
1211 ret = sysfs_create_group(&pdev->dev.kobj, &key_enumeration_group);
1212 if (ret)
1213 goto out_device;
1214
1215 /* create fan files */
1216 count = applesmc_get_fan_count();
1217 if (count < 0) {
1218 printk(KERN_ERR "applesmc: Cannot get the number of fans.\n");
1219 } else {
1220 printk(KERN_INFO "applesmc: %d fans found.\n", count);
1221
1222 switch (count) {
1223 default:
1224 printk(KERN_WARNING "applesmc: More than 2 fans found,"
1225 " but at most 2 fans are supported"
1226 " by the driver.\n");
1227 case 2:
1228 ret = sysfs_create_group(&pdev->dev.kobj,
1229 &fan_attribute_groups[1]);
1230 if (ret)
1231 goto out_key_enumeration;
1232 case 1:
1233 ret = sysfs_create_group(&pdev->dev.kobj,
1234 &fan_attribute_groups[0]);
1235 if (ret)
1236 goto out_fan_1;
1237 case 0:
1238 ;
1239 }
1240 }
1241
1242 for (i = 0;
1243 temperature_sensors_sets[applesmc_temperature_set][i] != NULL;
1244 i++) {
1245 if (temperature_attributes[i] == NULL) {
1246 printk(KERN_ERR "applesmc: More temperature sensors "
1247 "in temperature_sensors_sets (at least %i)"
1248 "than available sysfs files in "
1249 "temperature_attributes (%i), please report "
1250 "this bug.\n", i, i-1);
1251 goto out_temperature;
1252 }
1253 ret = sysfs_create_file(&pdev->dev.kobj,
1254 temperature_attributes[i]);
1255 if (ret)
1256 goto out_temperature;
1257 }
1258
1259 if (applesmc_accelerometer) {
1260 ret = applesmc_create_accelerometer();
1261 if (ret)
1262 goto out_temperature;
1263 }
1264
1265 if (applesmc_light) {
1266 /* Add light sensor file */
1267 ret = sysfs_create_file(&pdev->dev.kobj, &dev_attr_light.attr);
1268 if (ret)
1269 goto out_accelerometer;
1270
1271 /* Create the workqueue */
1272 applesmc_led_wq = create_singlethread_workqueue("applesmc-led");
1273 if (!applesmc_led_wq) {
1274 ret = -ENOMEM;
1275 goto out_light_sysfs;
1276 }
1277
1278 /* register as a led device */
1279 ret = led_classdev_register(&pdev->dev, &applesmc_backlight);
1280 if (ret < 0)
1281 goto out_light_wq;
1282 }
1283
1284 hwmon_class_dev = hwmon_device_register(&pdev->dev);
1285 if (IS_ERR(hwmon_class_dev)) {
1286 ret = PTR_ERR(hwmon_class_dev);
1287 goto out_light_ledclass;
1288 }
1289
1290 printk(KERN_INFO "applesmc: driver successfully loaded.\n");
1291
1292 return 0;
1293
1294out_light_ledclass:
1295 if (applesmc_light)
1296 led_classdev_unregister(&applesmc_backlight);
1297out_light_wq:
1298 if (applesmc_light)
1299 destroy_workqueue(applesmc_led_wq);
1300out_light_sysfs:
1301 if (applesmc_light)
1302 sysfs_remove_file(&pdev->dev.kobj, &dev_attr_light.attr);
1303out_accelerometer:
1304 if (applesmc_accelerometer)
1305 applesmc_release_accelerometer();
1306out_temperature:
1307 sysfs_remove_group(&pdev->dev.kobj, &temperature_attributes_group);
1308 sysfs_remove_group(&pdev->dev.kobj, &fan_attribute_groups[0]);
1309out_fan_1:
1310 sysfs_remove_group(&pdev->dev.kobj, &fan_attribute_groups[1]);
1311out_key_enumeration:
1312 sysfs_remove_group(&pdev->dev.kobj, &key_enumeration_group);
1313out_device:
1314 platform_device_unregister(pdev);
1315out_driver:
1316 platform_driver_unregister(&applesmc_driver);
1317out_region:
1318 release_region(APPLESMC_DATA_PORT, APPLESMC_NR_PORTS);
1319out:
1320 printk(KERN_WARNING "applesmc: driver init failed (ret=%d)!\n", ret);
1321 return ret;
1322}
1323
1324static void __exit applesmc_exit(void)
1325{
1326 hwmon_device_unregister(hwmon_class_dev);
1327 if (applesmc_light) {
1328 led_classdev_unregister(&applesmc_backlight);
1329 destroy_workqueue(applesmc_led_wq);
1330 sysfs_remove_file(&pdev->dev.kobj, &dev_attr_light.attr);
1331 }
1332 if (applesmc_accelerometer)
1333 applesmc_release_accelerometer();
1334 sysfs_remove_group(&pdev->dev.kobj, &temperature_attributes_group);
1335 sysfs_remove_group(&pdev->dev.kobj, &fan_attribute_groups[0]);
1336 sysfs_remove_group(&pdev->dev.kobj, &fan_attribute_groups[1]);
1337 sysfs_remove_group(&pdev->dev.kobj, &key_enumeration_group);
1338 platform_device_unregister(pdev);
1339 platform_driver_unregister(&applesmc_driver);
1340 release_region(APPLESMC_DATA_PORT, APPLESMC_NR_PORTS);
1341
1342 printk(KERN_INFO "applesmc: driver unloaded.\n");
1343}
1344
1345module_init(applesmc_init);
1346module_exit(applesmc_exit);
1347
1348MODULE_AUTHOR("Nicolas Boichat");
1349MODULE_DESCRIPTION("Apple SMC");
1350MODULE_LICENSE("GPL v2");
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