Merge branch 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mfashe...
[linux-2.6] / drivers / hwmon / applesmc.c
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-polldev.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  */
83 static const char* temperature_sensors_sets[][36] = {
84 /* Set 0: Macbook Pro */
85         { "TA0P", "TB0T", "TC0D", "TC0P", "TG0H", "TG0P", "TG0T", "Th0H",
86           "Th1H", "Tm0P", "Ts0P", "Ts1P", NULL },
87 /* Set 1: Macbook set */
88         { "TB0T", "TC0D", "TC0P", "TM0P", "TN0P", "TN1P", "Th0H", "Th0S",
89           "Th1H", "Ts0P", NULL },
90 /* Set 2: Macmini set */
91         { "TC0D", "TC0P", NULL },
92 /* Set 3: Mac Pro (2 x Quad-Core) */
93         { "TA0P", "TCAG", "TCAH", "TCBG", "TCBH", "TC0C", "TC0D", "TC0P",
94           "TC1C", "TC1D", "TC2C", "TC2D", "TC3C", "TC3D", "THTG", "TH0P",
95           "TH1P", "TH2P", "TH3P", "TMAP", "TMAS", "TMBS", "TM0P", "TM0S",
96           "TM1P", "TM1S", "TM2P", "TM2S", "TM3S", "TM8P", "TM8S", "TM9P",
97           "TM9S", "TN0H", "TS0C", NULL },
98 };
99
100 /* List of keys used to read/write fan speeds */
101 static const char* fan_speed_keys[] = {
102         FAN_ACTUAL_SPEED,
103         FAN_MIN_SPEED,
104         FAN_MAX_SPEED,
105         FAN_SAFE_SPEED,
106         FAN_TARGET_SPEED
107 };
108
109 #define INIT_TIMEOUT_MSECS      5000    /* wait up to 5s for device init ... */
110 #define INIT_WAIT_MSECS         50      /* ... in 50ms increments */
111
112 #define APPLESMC_POLL_INTERVAL  50      /* msecs */
113 #define APPLESMC_INPUT_FUZZ     4       /* input event threshold */
114 #define APPLESMC_INPUT_FLAT     4
115
116 #define SENSOR_X 0
117 #define SENSOR_Y 1
118 #define SENSOR_Z 2
119
120 /* Structure to be passed to DMI_MATCH function */
121 struct dmi_match_data {
122 /* Indicates whether this computer has an accelerometer. */
123         int accelerometer;
124 /* Indicates whether this computer has light sensors and keyboard backlight. */
125         int light;
126 /* Indicates which temperature sensors set to use. */
127         int temperature_set;
128 };
129
130 static const int debug;
131 static struct platform_device *pdev;
132 static s16 rest_x;
133 static s16 rest_y;
134 static struct device *hwmon_dev;
135 static struct input_polled_dev *applesmc_idev;
136
137 /* Indicates whether this computer has an accelerometer. */
138 static unsigned int applesmc_accelerometer;
139
140 /* Indicates whether this computer has light sensors and keyboard backlight. */
141 static unsigned int applesmc_light;
142
143 /* Indicates which temperature sensors set to use. */
144 static unsigned int applesmc_temperature_set;
145
146 static DEFINE_MUTEX(applesmc_lock);
147
148 /*
149  * Last index written to key_at_index sysfs file, and value to use for all other
150  * key_at_index_* sysfs files.
151  */
152 static unsigned int key_at_index;
153
154 static struct workqueue_struct *applesmc_led_wq;
155
156 /*
157  * __wait_status - Wait up to 2ms for the status port to get a certain value
158  * (masked with 0x0f), returning zero if the value is obtained.  Callers must
159  * hold applesmc_lock.
160  */
161 static int __wait_status(u8 val)
162 {
163         unsigned int i;
164
165         val = val & APPLESMC_STATUS_MASK;
166
167         for (i = 0; i < 200; i++) {
168                 if ((inb(APPLESMC_CMD_PORT) & APPLESMC_STATUS_MASK) == val) {
169                         if (debug)
170                                 printk(KERN_DEBUG
171                                                 "Waited %d us for status %x\n",
172                                                 i*10, val);
173                         return 0;
174                 }
175                 udelay(10);
176         }
177
178         printk(KERN_WARNING "applesmc: wait status failed: %x != %x\n",
179                                                 val, inb(APPLESMC_CMD_PORT));
180
181         return -EIO;
182 }
183
184 /*
185  * applesmc_read_key - reads len bytes from a given key, and put them in buffer.
186  * Returns zero on success or a negative error on failure. Callers must
187  * hold applesmc_lock.
188  */
189 static int applesmc_read_key(const char* key, u8* buffer, u8 len)
190 {
191         int i;
192
193         if (len > APPLESMC_MAX_DATA_LENGTH) {
194                 printk(KERN_ERR "applesmc_read_key: cannot read more than "
195                                         "%d bytes\n", APPLESMC_MAX_DATA_LENGTH);
196                 return -EINVAL;
197         }
198
199         outb(APPLESMC_READ_CMD, APPLESMC_CMD_PORT);
200         if (__wait_status(0x0c))
201                 return -EIO;
202
203         for (i = 0; i < 4; i++) {
204                 outb(key[i], APPLESMC_DATA_PORT);
205                 if (__wait_status(0x04))
206                         return -EIO;
207         }
208         if (debug)
209                 printk(KERN_DEBUG "<%s", key);
210
211         outb(len, APPLESMC_DATA_PORT);
212         if (debug)
213                 printk(KERN_DEBUG ">%x", len);
214
215         for (i = 0; i < len; i++) {
216                 if (__wait_status(0x05))
217                         return -EIO;
218                 buffer[i] = inb(APPLESMC_DATA_PORT);
219                 if (debug)
220                         printk(KERN_DEBUG "<%x", buffer[i]);
221         }
222         if (debug)
223                 printk(KERN_DEBUG "\n");
224
225         return 0;
226 }
227
228 /*
229  * applesmc_write_key - writes len bytes from buffer to a given key.
230  * Returns zero on success or a negative error on failure. Callers must
231  * hold applesmc_lock.
232  */
233 static int applesmc_write_key(const char* key, u8* buffer, u8 len)
234 {
235         int i;
236
237         if (len > APPLESMC_MAX_DATA_LENGTH) {
238                 printk(KERN_ERR "applesmc_write_key: cannot write more than "
239                                         "%d bytes\n", APPLESMC_MAX_DATA_LENGTH);
240                 return -EINVAL;
241         }
242
243         outb(APPLESMC_WRITE_CMD, APPLESMC_CMD_PORT);
244         if (__wait_status(0x0c))
245                 return -EIO;
246
247         for (i = 0; i < 4; i++) {
248                 outb(key[i], APPLESMC_DATA_PORT);
249                 if (__wait_status(0x04))
250                         return -EIO;
251         }
252
253         outb(len, APPLESMC_DATA_PORT);
254
255         for (i = 0; i < len; i++) {
256                 if (__wait_status(0x04))
257                         return -EIO;
258                 outb(buffer[i], APPLESMC_DATA_PORT);
259         }
260
261         return 0;
262 }
263
264 /*
265  * applesmc_get_key_at_index - get key at index, and put the result in key
266  * (char[6]). Returns zero on success or a negative error on failure. Callers
267  * must hold applesmc_lock.
268  */
269 static int applesmc_get_key_at_index(int index, char* key)
270 {
271         int i;
272         u8 readkey[4];
273         readkey[0] = index >> 24;
274         readkey[1] = index >> 16;
275         readkey[2] = index >> 8;
276         readkey[3] = index;
277
278         outb(APPLESMC_GET_KEY_BY_INDEX_CMD, APPLESMC_CMD_PORT);
279         if (__wait_status(0x0c))
280                 return -EIO;
281
282         for (i = 0; i < 4; i++) {
283                 outb(readkey[i], APPLESMC_DATA_PORT);
284                 if (__wait_status(0x04))
285                         return -EIO;
286         }
287
288         outb(4, APPLESMC_DATA_PORT);
289
290         for (i = 0; i < 4; i++) {
291                 if (__wait_status(0x05))
292                         return -EIO;
293                 key[i] = inb(APPLESMC_DATA_PORT);
294         }
295         key[4] = 0;
296
297         return 0;
298 }
299
300 /*
301  * applesmc_get_key_type - get key type, and put the result in type (char[6]).
302  * Returns zero on success or a negative error on failure. Callers must
303  * hold applesmc_lock.
304  */
305 static int applesmc_get_key_type(char* key, char* type)
306 {
307         int i;
308
309         outb(APPLESMC_GET_KEY_TYPE_CMD, APPLESMC_CMD_PORT);
310         if (__wait_status(0x0c))
311                 return -EIO;
312
313         for (i = 0; i < 4; i++) {
314                 outb(key[i], APPLESMC_DATA_PORT);
315                 if (__wait_status(0x04))
316                         return -EIO;
317         }
318
319         outb(5, APPLESMC_DATA_PORT);
320
321         for (i = 0; i < 6; i++) {
322                 if (__wait_status(0x05))
323                         return -EIO;
324                 type[i] = inb(APPLESMC_DATA_PORT);
325         }
326         type[5] = 0;
327
328         return 0;
329 }
330
331 /*
332  * applesmc_read_motion_sensor - Read motion sensor (X, Y or Z). Callers must
333  * hold applesmc_lock.
334  */
335 static int applesmc_read_motion_sensor(int index, s16* value)
336 {
337         u8 buffer[2];
338         int ret;
339
340         switch (index) {
341         case SENSOR_X:
342                 ret = applesmc_read_key(MOTION_SENSOR_X_KEY, buffer, 2);
343                 break;
344         case SENSOR_Y:
345                 ret = applesmc_read_key(MOTION_SENSOR_Y_KEY, buffer, 2);
346                 break;
347         case SENSOR_Z:
348                 ret = applesmc_read_key(MOTION_SENSOR_Z_KEY, buffer, 2);
349                 break;
350         default:
351                 ret = -EINVAL;
352         }
353
354         *value = ((s16)buffer[0] << 8) | buffer[1];
355
356         return ret;
357 }
358
359 /*
360  * applesmc_device_init - initialize the accelerometer.  Returns zero on success
361  * and negative error code on failure.  Can sleep.
362  */
363 static int applesmc_device_init(void)
364 {
365         int total, ret = -ENXIO;
366         u8 buffer[2];
367
368         if (!applesmc_accelerometer)
369                 return 0;
370
371         mutex_lock(&applesmc_lock);
372
373         for (total = INIT_TIMEOUT_MSECS; total > 0; total -= INIT_WAIT_MSECS) {
374                 if (debug)
375                         printk(KERN_DEBUG "applesmc try %d\n", total);
376                 if (!applesmc_read_key(MOTION_SENSOR_KEY, buffer, 2) &&
377                                 (buffer[0] != 0x00 || buffer[1] != 0x00)) {
378                         if (total == INIT_TIMEOUT_MSECS) {
379                                 printk(KERN_DEBUG "applesmc: device has"
380                                                 " already been initialized"
381                                                 " (0x%02x, 0x%02x).\n",
382                                                 buffer[0], buffer[1]);
383                         } else {
384                                 printk(KERN_DEBUG "applesmc: device"
385                                                 " successfully initialized"
386                                                 " (0x%02x, 0x%02x).\n",
387                                                 buffer[0], buffer[1]);
388                         }
389                         ret = 0;
390                         goto out;
391                 }
392                 buffer[0] = 0xe0;
393                 buffer[1] = 0x00;
394                 applesmc_write_key(MOTION_SENSOR_KEY, buffer, 2);
395                 msleep(INIT_WAIT_MSECS);
396         }
397
398         printk(KERN_WARNING "applesmc: failed to init the device\n");
399
400 out:
401         mutex_unlock(&applesmc_lock);
402         return ret;
403 }
404
405 /*
406  * applesmc_get_fan_count - get the number of fans. Callers must NOT hold
407  * applesmc_lock.
408  */
409 static int applesmc_get_fan_count(void)
410 {
411         int ret;
412         u8 buffer[1];
413
414         mutex_lock(&applesmc_lock);
415
416         ret = applesmc_read_key(FANS_COUNT, buffer, 1);
417
418         mutex_unlock(&applesmc_lock);
419         if (ret)
420                 return ret;
421         else
422                 return buffer[0];
423 }
424
425 /* Device model stuff */
426 static int applesmc_probe(struct platform_device *dev)
427 {
428         int ret;
429
430         ret = applesmc_device_init();
431         if (ret)
432                 return ret;
433
434         printk(KERN_INFO "applesmc: device successfully initialized.\n");
435         return 0;
436 }
437
438 static int applesmc_resume(struct platform_device *dev)
439 {
440         return applesmc_device_init();
441 }
442
443 static struct platform_driver applesmc_driver = {
444         .probe = applesmc_probe,
445         .resume = applesmc_resume,
446         .driver = {
447                 .name = "applesmc",
448                 .owner = THIS_MODULE,
449         },
450 };
451
452 /*
453  * applesmc_calibrate - Set our "resting" values.  Callers must
454  * hold applesmc_lock.
455  */
456 static void applesmc_calibrate(void)
457 {
458         applesmc_read_motion_sensor(SENSOR_X, &rest_x);
459         applesmc_read_motion_sensor(SENSOR_Y, &rest_y);
460         rest_x = -rest_x;
461 }
462
463 static void applesmc_idev_poll(struct input_polled_dev *dev)
464 {
465         struct input_dev *idev = dev->input;
466         s16 x, y;
467
468         mutex_lock(&applesmc_lock);
469
470         if (applesmc_read_motion_sensor(SENSOR_X, &x))
471                 goto out;
472         if (applesmc_read_motion_sensor(SENSOR_Y, &y))
473                 goto out;
474
475         x = -x;
476         input_report_abs(idev, ABS_X, x - rest_x);
477         input_report_abs(idev, ABS_Y, y - rest_y);
478         input_sync(idev);
479
480 out:
481         mutex_unlock(&applesmc_lock);
482 }
483
484 /* Sysfs Files */
485
486 static ssize_t applesmc_name_show(struct device *dev,
487                                    struct device_attribute *attr, char *buf)
488 {
489         return snprintf(buf, PAGE_SIZE, "applesmc\n");
490 }
491
492 static ssize_t applesmc_position_show(struct device *dev,
493                                    struct device_attribute *attr, char *buf)
494 {
495         int ret;
496         s16 x, y, z;
497
498         mutex_lock(&applesmc_lock);
499
500         ret = applesmc_read_motion_sensor(SENSOR_X, &x);
501         if (ret)
502                 goto out;
503         ret = applesmc_read_motion_sensor(SENSOR_Y, &y);
504         if (ret)
505                 goto out;
506         ret = applesmc_read_motion_sensor(SENSOR_Z, &z);
507         if (ret)
508                 goto out;
509
510 out:
511         mutex_unlock(&applesmc_lock);
512         if (ret)
513                 return ret;
514         else
515                 return snprintf(buf, PAGE_SIZE, "(%d,%d,%d)\n", x, y, z);
516 }
517
518 static ssize_t applesmc_light_show(struct device *dev,
519                                 struct device_attribute *attr, char *sysfsbuf)
520 {
521         int ret;
522         u8 left = 0, right = 0;
523         u8 buffer[6];
524
525         mutex_lock(&applesmc_lock);
526
527         ret = applesmc_read_key(LIGHT_SENSOR_LEFT_KEY, buffer, 6);
528         left = buffer[2];
529         if (ret)
530                 goto out;
531         ret = applesmc_read_key(LIGHT_SENSOR_RIGHT_KEY, buffer, 6);
532         right = buffer[2];
533
534 out:
535         mutex_unlock(&applesmc_lock);
536         if (ret)
537                 return ret;
538         else
539                 return snprintf(sysfsbuf, PAGE_SIZE, "(%d,%d)\n", left, right);
540 }
541
542 /* Displays degree Celsius * 1000 */
543 static ssize_t applesmc_show_temperature(struct device *dev,
544                         struct device_attribute *devattr, char *sysfsbuf)
545 {
546         int ret;
547         u8 buffer[2];
548         unsigned int temp;
549         struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
550         const char* key =
551                 temperature_sensors_sets[applesmc_temperature_set][attr->index];
552
553         mutex_lock(&applesmc_lock);
554
555         ret = applesmc_read_key(key, buffer, 2);
556         temp = buffer[0]*1000;
557         temp += (buffer[1] >> 6) * 250;
558
559         mutex_unlock(&applesmc_lock);
560
561         if (ret)
562                 return ret;
563         else
564                 return snprintf(sysfsbuf, PAGE_SIZE, "%u\n", temp);
565 }
566
567 static ssize_t applesmc_show_fan_speed(struct device *dev,
568                                 struct device_attribute *attr, char *sysfsbuf)
569 {
570         int ret;
571         unsigned int speed = 0;
572         char newkey[5];
573         u8 buffer[2];
574         struct sensor_device_attribute_2 *sensor_attr =
575                                                 to_sensor_dev_attr_2(attr);
576
577         newkey[0] = fan_speed_keys[sensor_attr->nr][0];
578         newkey[1] = '0' + sensor_attr->index;
579         newkey[2] = fan_speed_keys[sensor_attr->nr][2];
580         newkey[3] = fan_speed_keys[sensor_attr->nr][3];
581         newkey[4] = 0;
582
583         mutex_lock(&applesmc_lock);
584
585         ret = applesmc_read_key(newkey, buffer, 2);
586         speed = ((buffer[0] << 8 | buffer[1]) >> 2);
587
588         mutex_unlock(&applesmc_lock);
589         if (ret)
590                 return ret;
591         else
592                 return snprintf(sysfsbuf, PAGE_SIZE, "%u\n", speed);
593 }
594
595 static ssize_t applesmc_store_fan_speed(struct device *dev,
596                                         struct device_attribute *attr,
597                                         const char *sysfsbuf, size_t count)
598 {
599         int ret;
600         u32 speed;
601         char newkey[5];
602         u8 buffer[2];
603         struct sensor_device_attribute_2 *sensor_attr =
604                                                 to_sensor_dev_attr_2(attr);
605
606         speed = simple_strtoul(sysfsbuf, NULL, 10);
607
608         if (speed > 0x4000) /* Bigger than a 14-bit value */
609                 return -EINVAL;
610
611         newkey[0] = fan_speed_keys[sensor_attr->nr][0];
612         newkey[1] = '0' + sensor_attr->index;
613         newkey[2] = fan_speed_keys[sensor_attr->nr][2];
614         newkey[3] = fan_speed_keys[sensor_attr->nr][3];
615         newkey[4] = 0;
616
617         mutex_lock(&applesmc_lock);
618
619         buffer[0] = (speed >> 6) & 0xff;
620         buffer[1] = (speed << 2) & 0xff;
621         ret = applesmc_write_key(newkey, buffer, 2);
622
623         mutex_unlock(&applesmc_lock);
624         if (ret)
625                 return ret;
626         else
627                 return count;
628 }
629
630 static ssize_t applesmc_show_fan_manual(struct device *dev,
631                         struct device_attribute *devattr, char *sysfsbuf)
632 {
633         int ret;
634         u16 manual = 0;
635         u8 buffer[2];
636         struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
637
638         mutex_lock(&applesmc_lock);
639
640         ret = applesmc_read_key(FANS_MANUAL, buffer, 2);
641         manual = ((buffer[0] << 8 | buffer[1]) >> attr->index) & 0x01;
642
643         mutex_unlock(&applesmc_lock);
644         if (ret)
645                 return ret;
646         else
647                 return snprintf(sysfsbuf, PAGE_SIZE, "%d\n", manual);
648 }
649
650 static ssize_t applesmc_store_fan_manual(struct device *dev,
651                                          struct device_attribute *devattr,
652                                          const char *sysfsbuf, size_t count)
653 {
654         int ret;
655         u8 buffer[2];
656         u32 input;
657         u16 val;
658         struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
659
660         input = simple_strtoul(sysfsbuf, NULL, 10);
661
662         mutex_lock(&applesmc_lock);
663
664         ret = applesmc_read_key(FANS_MANUAL, buffer, 2);
665         val = (buffer[0] << 8 | buffer[1]);
666         if (ret)
667                 goto out;
668
669         if (input)
670                 val = val | (0x01 << attr->index);
671         else
672                 val = val & ~(0x01 << attr->index);
673
674         buffer[0] = (val >> 8) & 0xFF;
675         buffer[1] = val & 0xFF;
676
677         ret = applesmc_write_key(FANS_MANUAL, buffer, 2);
678
679 out:
680         mutex_unlock(&applesmc_lock);
681         if (ret)
682                 return ret;
683         else
684                 return count;
685 }
686
687 static ssize_t applesmc_show_fan_position(struct device *dev,
688                                 struct device_attribute *attr, char *sysfsbuf)
689 {
690         int ret;
691         char newkey[5];
692         u8 buffer[17];
693         struct sensor_device_attribute_2 *sensor_attr =
694                                                 to_sensor_dev_attr_2(attr);
695
696         newkey[0] = FAN_POSITION[0];
697         newkey[1] = '0' + sensor_attr->index;
698         newkey[2] = FAN_POSITION[2];
699         newkey[3] = FAN_POSITION[3];
700         newkey[4] = 0;
701
702         mutex_lock(&applesmc_lock);
703
704         ret = applesmc_read_key(newkey, buffer, 16);
705         buffer[16] = 0;
706
707         mutex_unlock(&applesmc_lock);
708         if (ret)
709                 return ret;
710         else
711                 return snprintf(sysfsbuf, PAGE_SIZE, "%s\n", buffer+4);
712 }
713
714 static ssize_t applesmc_calibrate_show(struct device *dev,
715                                 struct device_attribute *attr, char *sysfsbuf)
716 {
717         return snprintf(sysfsbuf, PAGE_SIZE, "(%d,%d)\n", rest_x, rest_y);
718 }
719
720 static ssize_t applesmc_calibrate_store(struct device *dev,
721         struct device_attribute *attr, const char *sysfsbuf, size_t count)
722 {
723         mutex_lock(&applesmc_lock);
724         applesmc_calibrate();
725         mutex_unlock(&applesmc_lock);
726
727         return count;
728 }
729
730 /* Store the next backlight value to be written by the work */
731 static unsigned int backlight_value;
732
733 static void applesmc_backlight_set(struct work_struct *work)
734 {
735         u8 buffer[2];
736
737         mutex_lock(&applesmc_lock);
738         buffer[0] = backlight_value;
739         buffer[1] = 0x00;
740         applesmc_write_key(BACKLIGHT_KEY, buffer, 2);
741         mutex_unlock(&applesmc_lock);
742 }
743 static DECLARE_WORK(backlight_work, &applesmc_backlight_set);
744
745 static void applesmc_brightness_set(struct led_classdev *led_cdev,
746                                                 enum led_brightness value)
747 {
748         int ret;
749
750         backlight_value = value;
751         ret = queue_work(applesmc_led_wq, &backlight_work);
752
753         if (debug && (!ret))
754                 printk(KERN_DEBUG "applesmc: work was already on the queue.\n");
755 }
756
757 static ssize_t applesmc_key_count_show(struct device *dev,
758                                 struct device_attribute *attr, char *sysfsbuf)
759 {
760         int ret;
761         u8 buffer[4];
762         u32 count;
763
764         mutex_lock(&applesmc_lock);
765
766         ret = applesmc_read_key(KEY_COUNT_KEY, buffer, 4);
767         count = ((u32)buffer[0]<<24) + ((u32)buffer[1]<<16) +
768                                                 ((u32)buffer[2]<<8) + buffer[3];
769
770         mutex_unlock(&applesmc_lock);
771         if (ret)
772                 return ret;
773         else
774                 return snprintf(sysfsbuf, PAGE_SIZE, "%d\n", count);
775 }
776
777 static ssize_t applesmc_key_at_index_read_show(struct device *dev,
778                                 struct device_attribute *attr, char *sysfsbuf)
779 {
780         char key[5];
781         char info[6];
782         int ret;
783
784         mutex_lock(&applesmc_lock);
785
786         ret = applesmc_get_key_at_index(key_at_index, key);
787
788         if (ret || !key[0]) {
789                 mutex_unlock(&applesmc_lock);
790
791                 return -EINVAL;
792         }
793
794         ret = applesmc_get_key_type(key, info);
795
796         if (ret) {
797                 mutex_unlock(&applesmc_lock);
798
799                 return ret;
800         }
801
802         /*
803          * info[0] maximum value (APPLESMC_MAX_DATA_LENGTH) is much lower than
804          * PAGE_SIZE, so we don't need any checks before writing to sysfsbuf.
805          */
806         ret = applesmc_read_key(key, sysfsbuf, info[0]);
807
808         mutex_unlock(&applesmc_lock);
809
810         if (!ret) {
811                 return info[0];
812         } else {
813                 return ret;
814         }
815 }
816
817 static ssize_t applesmc_key_at_index_data_length_show(struct device *dev,
818                                 struct device_attribute *attr, char *sysfsbuf)
819 {
820         char key[5];
821         char info[6];
822         int ret;
823
824         mutex_lock(&applesmc_lock);
825
826         ret = applesmc_get_key_at_index(key_at_index, key);
827
828         if (ret || !key[0]) {
829                 mutex_unlock(&applesmc_lock);
830
831                 return -EINVAL;
832         }
833
834         ret = applesmc_get_key_type(key, info);
835
836         mutex_unlock(&applesmc_lock);
837
838         if (!ret)
839                 return snprintf(sysfsbuf, PAGE_SIZE, "%d\n", info[0]);
840         else
841                 return ret;
842 }
843
844 static ssize_t applesmc_key_at_index_type_show(struct device *dev,
845                                 struct device_attribute *attr, char *sysfsbuf)
846 {
847         char key[5];
848         char info[6];
849         int ret;
850
851         mutex_lock(&applesmc_lock);
852
853         ret = applesmc_get_key_at_index(key_at_index, key);
854
855         if (ret || !key[0]) {
856                 mutex_unlock(&applesmc_lock);
857
858                 return -EINVAL;
859         }
860
861         ret = applesmc_get_key_type(key, info);
862
863         mutex_unlock(&applesmc_lock);
864
865         if (!ret)
866                 return snprintf(sysfsbuf, PAGE_SIZE, "%s\n", info+1);
867         else
868                 return ret;
869 }
870
871 static ssize_t applesmc_key_at_index_name_show(struct device *dev,
872                                 struct device_attribute *attr, char *sysfsbuf)
873 {
874         char key[5];
875         int ret;
876
877         mutex_lock(&applesmc_lock);
878
879         ret = applesmc_get_key_at_index(key_at_index, key);
880
881         mutex_unlock(&applesmc_lock);
882
883         if (!ret && key[0])
884                 return snprintf(sysfsbuf, PAGE_SIZE, "%s\n", key);
885         else
886                 return -EINVAL;
887 }
888
889 static ssize_t applesmc_key_at_index_show(struct device *dev,
890                                 struct device_attribute *attr, char *sysfsbuf)
891 {
892         return snprintf(sysfsbuf, PAGE_SIZE, "%d\n", key_at_index);
893 }
894
895 static ssize_t applesmc_key_at_index_store(struct device *dev,
896         struct device_attribute *attr, const char *sysfsbuf, size_t count)
897 {
898         mutex_lock(&applesmc_lock);
899
900         key_at_index = simple_strtoul(sysfsbuf, NULL, 10);
901
902         mutex_unlock(&applesmc_lock);
903
904         return count;
905 }
906
907 static struct led_classdev applesmc_backlight = {
908         .name                   = "smc::kbd_backlight",
909         .default_trigger        = "nand-disk",
910         .brightness_set         = applesmc_brightness_set,
911 };
912
913 static DEVICE_ATTR(name, 0444, applesmc_name_show, NULL);
914
915 static DEVICE_ATTR(position, 0444, applesmc_position_show, NULL);
916 static DEVICE_ATTR(calibrate, 0644,
917                         applesmc_calibrate_show, applesmc_calibrate_store);
918
919 static struct attribute *accelerometer_attributes[] = {
920         &dev_attr_position.attr,
921         &dev_attr_calibrate.attr,
922         NULL
923 };
924
925 static const struct attribute_group accelerometer_attributes_group =
926         { .attrs = accelerometer_attributes };
927
928 static DEVICE_ATTR(light, 0444, applesmc_light_show, NULL);
929
930 static DEVICE_ATTR(key_count, 0444, applesmc_key_count_show, NULL);
931 static DEVICE_ATTR(key_at_index, 0644,
932                 applesmc_key_at_index_show, applesmc_key_at_index_store);
933 static DEVICE_ATTR(key_at_index_name, 0444,
934                                         applesmc_key_at_index_name_show, NULL);
935 static DEVICE_ATTR(key_at_index_type, 0444,
936                                         applesmc_key_at_index_type_show, NULL);
937 static DEVICE_ATTR(key_at_index_data_length, 0444,
938                                 applesmc_key_at_index_data_length_show, NULL);
939 static DEVICE_ATTR(key_at_index_data, 0444,
940                                 applesmc_key_at_index_read_show, NULL);
941
942 static struct attribute *key_enumeration_attributes[] = {
943         &dev_attr_key_count.attr,
944         &dev_attr_key_at_index.attr,
945         &dev_attr_key_at_index_name.attr,
946         &dev_attr_key_at_index_type.attr,
947         &dev_attr_key_at_index_data_length.attr,
948         &dev_attr_key_at_index_data.attr,
949         NULL
950 };
951
952 static const struct attribute_group key_enumeration_group =
953         { .attrs = key_enumeration_attributes };
954
955 /*
956  * Macro defining SENSOR_DEVICE_ATTR for a fan sysfs entries.
957  *  - show actual speed
958  *  - show/store minimum speed
959  *  - show maximum speed
960  *  - show safe speed
961  *  - show/store target speed
962  *  - show/store manual mode
963  */
964 #define sysfs_fan_speeds_offset(offset) \
965 static SENSOR_DEVICE_ATTR_2(fan##offset##_input, S_IRUGO, \
966                         applesmc_show_fan_speed, NULL, 0, offset-1); \
967 \
968 static SENSOR_DEVICE_ATTR_2(fan##offset##_min, S_IRUGO | S_IWUSR, \
969         applesmc_show_fan_speed, applesmc_store_fan_speed, 1, offset-1); \
970 \
971 static SENSOR_DEVICE_ATTR_2(fan##offset##_max, S_IRUGO, \
972                         applesmc_show_fan_speed, NULL, 2, offset-1); \
973 \
974 static SENSOR_DEVICE_ATTR_2(fan##offset##_safe, S_IRUGO, \
975                         applesmc_show_fan_speed, NULL, 3, offset-1); \
976 \
977 static SENSOR_DEVICE_ATTR_2(fan##offset##_output, S_IRUGO | S_IWUSR, \
978         applesmc_show_fan_speed, applesmc_store_fan_speed, 4, offset-1); \
979 \
980 static SENSOR_DEVICE_ATTR(fan##offset##_manual, S_IRUGO | S_IWUSR, \
981         applesmc_show_fan_manual, applesmc_store_fan_manual, offset-1); \
982 \
983 static SENSOR_DEVICE_ATTR(fan##offset##_label, S_IRUGO, \
984         applesmc_show_fan_position, NULL, offset-1); \
985 \
986 static struct attribute *fan##offset##_attributes[] = { \
987         &sensor_dev_attr_fan##offset##_input.dev_attr.attr, \
988         &sensor_dev_attr_fan##offset##_min.dev_attr.attr, \
989         &sensor_dev_attr_fan##offset##_max.dev_attr.attr, \
990         &sensor_dev_attr_fan##offset##_safe.dev_attr.attr, \
991         &sensor_dev_attr_fan##offset##_output.dev_attr.attr, \
992         &sensor_dev_attr_fan##offset##_manual.dev_attr.attr, \
993         &sensor_dev_attr_fan##offset##_label.dev_attr.attr, \
994         NULL \
995 };
996
997 /*
998  * Create the needed functions for each fan using the macro defined above
999  * (4 fans are supported)
1000  */
1001 sysfs_fan_speeds_offset(1);
1002 sysfs_fan_speeds_offset(2);
1003 sysfs_fan_speeds_offset(3);
1004 sysfs_fan_speeds_offset(4);
1005
1006 static const struct attribute_group fan_attribute_groups[] = {
1007         { .attrs = fan1_attributes },
1008         { .attrs = fan2_attributes },
1009         { .attrs = fan3_attributes },
1010         { .attrs = fan4_attributes },
1011 };
1012
1013 /*
1014  * Temperature sensors sysfs entries.
1015  */
1016 static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO,
1017                                         applesmc_show_temperature, NULL, 0);
1018 static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO,
1019                                         applesmc_show_temperature, NULL, 1);
1020 static SENSOR_DEVICE_ATTR(temp3_input, S_IRUGO,
1021                                         applesmc_show_temperature, NULL, 2);
1022 static SENSOR_DEVICE_ATTR(temp4_input, S_IRUGO,
1023                                         applesmc_show_temperature, NULL, 3);
1024 static SENSOR_DEVICE_ATTR(temp5_input, S_IRUGO,
1025                                         applesmc_show_temperature, NULL, 4);
1026 static SENSOR_DEVICE_ATTR(temp6_input, S_IRUGO,
1027                                         applesmc_show_temperature, NULL, 5);
1028 static SENSOR_DEVICE_ATTR(temp7_input, S_IRUGO,
1029                                         applesmc_show_temperature, NULL, 6);
1030 static SENSOR_DEVICE_ATTR(temp8_input, S_IRUGO,
1031                                         applesmc_show_temperature, NULL, 7);
1032 static SENSOR_DEVICE_ATTR(temp9_input, S_IRUGO,
1033                                         applesmc_show_temperature, NULL, 8);
1034 static SENSOR_DEVICE_ATTR(temp10_input, S_IRUGO,
1035                                         applesmc_show_temperature, NULL, 9);
1036 static SENSOR_DEVICE_ATTR(temp11_input, S_IRUGO,
1037                                         applesmc_show_temperature, NULL, 10);
1038 static SENSOR_DEVICE_ATTR(temp12_input, S_IRUGO,
1039                                         applesmc_show_temperature, NULL, 11);
1040 static SENSOR_DEVICE_ATTR(temp13_input, S_IRUGO,
1041                                         applesmc_show_temperature, NULL, 12);
1042 static SENSOR_DEVICE_ATTR(temp14_input, S_IRUGO,
1043                                         applesmc_show_temperature, NULL, 13);
1044 static SENSOR_DEVICE_ATTR(temp15_input, S_IRUGO,
1045                                         applesmc_show_temperature, NULL, 14);
1046 static SENSOR_DEVICE_ATTR(temp16_input, S_IRUGO,
1047                                         applesmc_show_temperature, NULL, 15);
1048 static SENSOR_DEVICE_ATTR(temp17_input, S_IRUGO,
1049                                         applesmc_show_temperature, NULL, 16);
1050 static SENSOR_DEVICE_ATTR(temp18_input, S_IRUGO,
1051                                         applesmc_show_temperature, NULL, 17);
1052 static SENSOR_DEVICE_ATTR(temp19_input, S_IRUGO,
1053                                         applesmc_show_temperature, NULL, 18);
1054 static SENSOR_DEVICE_ATTR(temp20_input, S_IRUGO,
1055                                         applesmc_show_temperature, NULL, 19);
1056 static SENSOR_DEVICE_ATTR(temp21_input, S_IRUGO,
1057                                         applesmc_show_temperature, NULL, 20);
1058 static SENSOR_DEVICE_ATTR(temp22_input, S_IRUGO,
1059                                         applesmc_show_temperature, NULL, 21);
1060 static SENSOR_DEVICE_ATTR(temp23_input, S_IRUGO,
1061                                         applesmc_show_temperature, NULL, 22);
1062 static SENSOR_DEVICE_ATTR(temp24_input, S_IRUGO,
1063                                         applesmc_show_temperature, NULL, 23);
1064 static SENSOR_DEVICE_ATTR(temp25_input, S_IRUGO,
1065                                         applesmc_show_temperature, NULL, 24);
1066 static SENSOR_DEVICE_ATTR(temp26_input, S_IRUGO,
1067                                         applesmc_show_temperature, NULL, 25);
1068 static SENSOR_DEVICE_ATTR(temp27_input, S_IRUGO,
1069                                         applesmc_show_temperature, NULL, 26);
1070 static SENSOR_DEVICE_ATTR(temp28_input, S_IRUGO,
1071                                         applesmc_show_temperature, NULL, 27);
1072 static SENSOR_DEVICE_ATTR(temp29_input, S_IRUGO,
1073                                         applesmc_show_temperature, NULL, 28);
1074 static SENSOR_DEVICE_ATTR(temp30_input, S_IRUGO,
1075                                         applesmc_show_temperature, NULL, 29);
1076 static SENSOR_DEVICE_ATTR(temp31_input, S_IRUGO,
1077                                         applesmc_show_temperature, NULL, 30);
1078 static SENSOR_DEVICE_ATTR(temp32_input, S_IRUGO,
1079                                         applesmc_show_temperature, NULL, 31);
1080 static SENSOR_DEVICE_ATTR(temp33_input, S_IRUGO,
1081                                         applesmc_show_temperature, NULL, 32);
1082 static SENSOR_DEVICE_ATTR(temp34_input, S_IRUGO,
1083                                         applesmc_show_temperature, NULL, 33);
1084 static SENSOR_DEVICE_ATTR(temp35_input, S_IRUGO,
1085                                         applesmc_show_temperature, NULL, 34);
1086
1087 static struct attribute *temperature_attributes[] = {
1088         &sensor_dev_attr_temp1_input.dev_attr.attr,
1089         &sensor_dev_attr_temp2_input.dev_attr.attr,
1090         &sensor_dev_attr_temp3_input.dev_attr.attr,
1091         &sensor_dev_attr_temp4_input.dev_attr.attr,
1092         &sensor_dev_attr_temp5_input.dev_attr.attr,
1093         &sensor_dev_attr_temp6_input.dev_attr.attr,
1094         &sensor_dev_attr_temp7_input.dev_attr.attr,
1095         &sensor_dev_attr_temp8_input.dev_attr.attr,
1096         &sensor_dev_attr_temp9_input.dev_attr.attr,
1097         &sensor_dev_attr_temp10_input.dev_attr.attr,
1098         &sensor_dev_attr_temp11_input.dev_attr.attr,
1099         &sensor_dev_attr_temp12_input.dev_attr.attr,
1100         &sensor_dev_attr_temp13_input.dev_attr.attr,
1101         &sensor_dev_attr_temp14_input.dev_attr.attr,
1102         &sensor_dev_attr_temp15_input.dev_attr.attr,
1103         &sensor_dev_attr_temp16_input.dev_attr.attr,
1104         &sensor_dev_attr_temp17_input.dev_attr.attr,
1105         &sensor_dev_attr_temp18_input.dev_attr.attr,
1106         &sensor_dev_attr_temp19_input.dev_attr.attr,
1107         &sensor_dev_attr_temp20_input.dev_attr.attr,
1108         &sensor_dev_attr_temp21_input.dev_attr.attr,
1109         &sensor_dev_attr_temp22_input.dev_attr.attr,
1110         &sensor_dev_attr_temp23_input.dev_attr.attr,
1111         &sensor_dev_attr_temp24_input.dev_attr.attr,
1112         &sensor_dev_attr_temp25_input.dev_attr.attr,
1113         &sensor_dev_attr_temp26_input.dev_attr.attr,
1114         &sensor_dev_attr_temp27_input.dev_attr.attr,
1115         &sensor_dev_attr_temp28_input.dev_attr.attr,
1116         &sensor_dev_attr_temp29_input.dev_attr.attr,
1117         &sensor_dev_attr_temp30_input.dev_attr.attr,
1118         &sensor_dev_attr_temp31_input.dev_attr.attr,
1119         &sensor_dev_attr_temp32_input.dev_attr.attr,
1120         &sensor_dev_attr_temp33_input.dev_attr.attr,
1121         &sensor_dev_attr_temp34_input.dev_attr.attr,
1122         &sensor_dev_attr_temp35_input.dev_attr.attr,
1123         NULL
1124 };
1125
1126 static const struct attribute_group temperature_attributes_group =
1127         { .attrs = temperature_attributes };
1128
1129 /* Module stuff */
1130
1131 /*
1132  * applesmc_dmi_match - found a match.  return one, short-circuiting the hunt.
1133  */
1134 static int applesmc_dmi_match(const struct dmi_system_id *id)
1135 {
1136         int i = 0;
1137         struct dmi_match_data* dmi_data = id->driver_data;
1138         printk(KERN_INFO "applesmc: %s detected:\n", id->ident);
1139         applesmc_accelerometer = dmi_data->accelerometer;
1140         printk(KERN_INFO "applesmc:  - Model %s accelerometer\n",
1141                                 applesmc_accelerometer ? "with" : "without");
1142         applesmc_light = dmi_data->light;
1143         printk(KERN_INFO "applesmc:  - Model %s light sensors and backlight\n",
1144                                         applesmc_light ? "with" : "without");
1145
1146         applesmc_temperature_set =  dmi_data->temperature_set;
1147         while (temperature_sensors_sets[applesmc_temperature_set][i] != NULL)
1148                 i++;
1149         printk(KERN_INFO "applesmc:  - Model with %d temperature sensors\n", i);
1150         return 1;
1151 }
1152
1153 /* Create accelerometer ressources */
1154 static int applesmc_create_accelerometer(void)
1155 {
1156         struct input_dev *idev;
1157         int ret;
1158
1159         ret = sysfs_create_group(&pdev->dev.kobj,
1160                                         &accelerometer_attributes_group);
1161         if (ret)
1162                 goto out;
1163
1164         applesmc_idev = input_allocate_polled_device();
1165         if (!applesmc_idev) {
1166                 ret = -ENOMEM;
1167                 goto out_sysfs;
1168         }
1169
1170         applesmc_idev->poll = applesmc_idev_poll;
1171         applesmc_idev->poll_interval = APPLESMC_POLL_INTERVAL;
1172
1173         /* initial calibrate for the input device */
1174         applesmc_calibrate();
1175
1176         /* initialize the input device */
1177         idev = applesmc_idev->input;
1178         idev->name = "applesmc";
1179         idev->id.bustype = BUS_HOST;
1180         idev->dev.parent = &pdev->dev;
1181         idev->evbit[0] = BIT_MASK(EV_ABS);
1182         input_set_abs_params(idev, ABS_X,
1183                         -256, 256, APPLESMC_INPUT_FUZZ, APPLESMC_INPUT_FLAT);
1184         input_set_abs_params(idev, ABS_Y,
1185                         -256, 256, APPLESMC_INPUT_FUZZ, APPLESMC_INPUT_FLAT);
1186
1187         ret = input_register_polled_device(applesmc_idev);
1188         if (ret)
1189                 goto out_idev;
1190
1191         return 0;
1192
1193 out_idev:
1194         input_free_polled_device(applesmc_idev);
1195
1196 out_sysfs:
1197         sysfs_remove_group(&pdev->dev.kobj, &accelerometer_attributes_group);
1198
1199 out:
1200         printk(KERN_WARNING "applesmc: driver init failed (ret=%d)!\n", ret);
1201         return ret;
1202 }
1203
1204 /* Release all ressources used by the accelerometer */
1205 static void applesmc_release_accelerometer(void)
1206 {
1207         input_unregister_polled_device(applesmc_idev);
1208         input_free_polled_device(applesmc_idev);
1209         sysfs_remove_group(&pdev->dev.kobj, &accelerometer_attributes_group);
1210 }
1211
1212 static __initdata struct dmi_match_data applesmc_dmi_data[] = {
1213 /* MacBook Pro: accelerometer, backlight and temperature set 0 */
1214         { .accelerometer = 1, .light = 1, .temperature_set = 0 },
1215 /* MacBook: accelerometer and temperature set 1 */
1216         { .accelerometer = 1, .light = 0, .temperature_set = 1 },
1217 /* MacMini: temperature set 2 */
1218         { .accelerometer = 0, .light = 0, .temperature_set = 2 },
1219 /* MacPro: temperature set 3 */
1220         { .accelerometer = 0, .light = 0, .temperature_set = 3 },
1221 };
1222
1223 /* Note that DMI_MATCH(...,"MacBook") will match "MacBookPro1,1".
1224  * So we need to put "Apple MacBook Pro" before "Apple MacBook". */
1225 static __initdata struct dmi_system_id applesmc_whitelist[] = {
1226         { applesmc_dmi_match, "Apple MacBook Pro", {
1227           DMI_MATCH(DMI_BOARD_VENDOR,"Apple"),
1228           DMI_MATCH(DMI_PRODUCT_NAME,"MacBookPro") },
1229                 (void*)&applesmc_dmi_data[0]},
1230         { applesmc_dmi_match, "Apple MacBook", {
1231           DMI_MATCH(DMI_BOARD_VENDOR,"Apple"),
1232           DMI_MATCH(DMI_PRODUCT_NAME,"MacBook") },
1233                 (void*)&applesmc_dmi_data[1]},
1234         { applesmc_dmi_match, "Apple Macmini", {
1235           DMI_MATCH(DMI_BOARD_VENDOR,"Apple"),
1236           DMI_MATCH(DMI_PRODUCT_NAME,"Macmini") },
1237                 (void*)&applesmc_dmi_data[2]},
1238         { applesmc_dmi_match, "Apple MacPro2", {
1239           DMI_MATCH(DMI_BOARD_VENDOR,"Apple"),
1240           DMI_MATCH(DMI_PRODUCT_NAME,"MacPro2") },
1241                 (void*)&applesmc_dmi_data[3]},
1242         { .ident = NULL }
1243 };
1244
1245 static int __init applesmc_init(void)
1246 {
1247         int ret;
1248         int count;
1249         int i;
1250
1251         if (!dmi_check_system(applesmc_whitelist)) {
1252                 printk(KERN_WARNING "applesmc: supported laptop not found!\n");
1253                 ret = -ENODEV;
1254                 goto out;
1255         }
1256
1257         if (!request_region(APPLESMC_DATA_PORT, APPLESMC_NR_PORTS,
1258                                                                 "applesmc")) {
1259                 ret = -ENXIO;
1260                 goto out;
1261         }
1262
1263         ret = platform_driver_register(&applesmc_driver);
1264         if (ret)
1265                 goto out_region;
1266
1267         pdev = platform_device_register_simple("applesmc", APPLESMC_DATA_PORT,
1268                                                NULL, 0);
1269         if (IS_ERR(pdev)) {
1270                 ret = PTR_ERR(pdev);
1271                 goto out_driver;
1272         }
1273
1274         ret = sysfs_create_file(&pdev->dev.kobj, &dev_attr_name.attr);
1275         if (ret)
1276                 goto out_device;
1277
1278         /* Create key enumeration sysfs files */
1279         ret = sysfs_create_group(&pdev->dev.kobj, &key_enumeration_group);
1280         if (ret)
1281                 goto out_name;
1282
1283         /* create fan files */
1284         count = applesmc_get_fan_count();
1285         if (count < 0) {
1286                 printk(KERN_ERR "applesmc: Cannot get the number of fans.\n");
1287         } else {
1288                 printk(KERN_INFO "applesmc: %d fans found.\n", count);
1289
1290                 switch (count) {
1291                 default:
1292                         printk(KERN_WARNING "applesmc: More than 4 fans found,"
1293                                         " but at most 4 fans are supported"
1294                                                 " by the driver.\n");
1295                 case 4:
1296                         ret = sysfs_create_group(&pdev->dev.kobj,
1297                                                  &fan_attribute_groups[3]);
1298                         if (ret)
1299                                 goto out_key_enumeration;
1300                 case 3:
1301                         ret = sysfs_create_group(&pdev->dev.kobj,
1302                                                  &fan_attribute_groups[2]);
1303                         if (ret)
1304                                 goto out_key_enumeration;
1305                 case 2:
1306                         ret = sysfs_create_group(&pdev->dev.kobj,
1307                                                  &fan_attribute_groups[1]);
1308                         if (ret)
1309                                 goto out_key_enumeration;
1310                 case 1:
1311                         ret = sysfs_create_group(&pdev->dev.kobj,
1312                                                  &fan_attribute_groups[0]);
1313                         if (ret)
1314                                 goto out_fan_1;
1315                 case 0:
1316                         ;
1317                 }
1318         }
1319
1320         for (i = 0;
1321              temperature_sensors_sets[applesmc_temperature_set][i] != NULL;
1322              i++) {
1323                 if (temperature_attributes[i] == NULL) {
1324                         printk(KERN_ERR "applesmc: More temperature sensors "
1325                                 "in temperature_sensors_sets (at least %i)"
1326                                 "than available sysfs files in "
1327                                 "temperature_attributes (%i), please report "
1328                                 "this bug.\n", i, i-1);
1329                         goto out_temperature;
1330                 }
1331                 ret = sysfs_create_file(&pdev->dev.kobj,
1332                                                 temperature_attributes[i]);
1333                 if (ret)
1334                         goto out_temperature;
1335         }
1336
1337         if (applesmc_accelerometer) {
1338                 ret = applesmc_create_accelerometer();
1339                 if (ret)
1340                         goto out_temperature;
1341         }
1342
1343         if (applesmc_light) {
1344                 /* Add light sensor file */
1345                 ret = sysfs_create_file(&pdev->dev.kobj, &dev_attr_light.attr);
1346                 if (ret)
1347                         goto out_accelerometer;
1348
1349                 /* Create the workqueue */
1350                 applesmc_led_wq = create_singlethread_workqueue("applesmc-led");
1351                 if (!applesmc_led_wq) {
1352                         ret = -ENOMEM;
1353                         goto out_light_sysfs;
1354                 }
1355
1356                 /* register as a led device */
1357                 ret = led_classdev_register(&pdev->dev, &applesmc_backlight);
1358                 if (ret < 0)
1359                         goto out_light_wq;
1360         }
1361
1362         hwmon_dev = hwmon_device_register(&pdev->dev);
1363         if (IS_ERR(hwmon_dev)) {
1364                 ret = PTR_ERR(hwmon_dev);
1365                 goto out_light_ledclass;
1366         }
1367
1368         printk(KERN_INFO "applesmc: driver successfully loaded.\n");
1369
1370         return 0;
1371
1372 out_light_ledclass:
1373         if (applesmc_light)
1374                 led_classdev_unregister(&applesmc_backlight);
1375 out_light_wq:
1376         if (applesmc_light)
1377                 destroy_workqueue(applesmc_led_wq);
1378 out_light_sysfs:
1379         if (applesmc_light)
1380                 sysfs_remove_file(&pdev->dev.kobj, &dev_attr_light.attr);
1381 out_accelerometer:
1382         if (applesmc_accelerometer)
1383                 applesmc_release_accelerometer();
1384 out_temperature:
1385         sysfs_remove_group(&pdev->dev.kobj, &temperature_attributes_group);
1386         sysfs_remove_group(&pdev->dev.kobj, &fan_attribute_groups[0]);
1387 out_fan_1:
1388         sysfs_remove_group(&pdev->dev.kobj, &fan_attribute_groups[1]);
1389 out_key_enumeration:
1390         sysfs_remove_group(&pdev->dev.kobj, &key_enumeration_group);
1391 out_name:
1392         sysfs_remove_file(&pdev->dev.kobj, &dev_attr_name.attr);
1393 out_device:
1394         platform_device_unregister(pdev);
1395 out_driver:
1396         platform_driver_unregister(&applesmc_driver);
1397 out_region:
1398         release_region(APPLESMC_DATA_PORT, APPLESMC_NR_PORTS);
1399 out:
1400         printk(KERN_WARNING "applesmc: driver init failed (ret=%d)!\n", ret);
1401         return ret;
1402 }
1403
1404 static void __exit applesmc_exit(void)
1405 {
1406         hwmon_device_unregister(hwmon_dev);
1407         if (applesmc_light) {
1408                 led_classdev_unregister(&applesmc_backlight);
1409                 destroy_workqueue(applesmc_led_wq);
1410                 sysfs_remove_file(&pdev->dev.kobj, &dev_attr_light.attr);
1411         }
1412         if (applesmc_accelerometer)
1413                 applesmc_release_accelerometer();
1414         sysfs_remove_group(&pdev->dev.kobj, &temperature_attributes_group);
1415         sysfs_remove_group(&pdev->dev.kobj, &fan_attribute_groups[0]);
1416         sysfs_remove_group(&pdev->dev.kobj, &fan_attribute_groups[1]);
1417         sysfs_remove_group(&pdev->dev.kobj, &key_enumeration_group);
1418         sysfs_remove_file(&pdev->dev.kobj, &dev_attr_name.attr);
1419         platform_device_unregister(pdev);
1420         platform_driver_unregister(&applesmc_driver);
1421         release_region(APPLESMC_DATA_PORT, APPLESMC_NR_PORTS);
1422
1423         printk(KERN_INFO "applesmc: driver unloaded.\n");
1424 }
1425
1426 module_init(applesmc_init);
1427 module_exit(applesmc_exit);
1428
1429 MODULE_AUTHOR("Nicolas Boichat");
1430 MODULE_DESCRIPTION("Apple SMC");
1431 MODULE_LICENSE("GPL v2");