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-rw-r--r--drivers/hwmon/applesmc.c1339
1 files changed, 1339 insertions, 0 deletions
diff --git a/drivers/hwmon/applesmc.c b/drivers/hwmon/applesmc.c
new file mode 100644
index 000000000000..3215f9c87f32
--- /dev/null
+++ b/drivers/hwmon/applesmc.c
@@ -0,0 +1,1339 @@
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
494static ssize_t applesmc_position_show(struct device *dev,
495 struct device_attribute *attr, char *buf)
496{
497 int ret;
498 s16 x, y, z;
499
500 mutex_lock(&applesmc_lock);
501
502 ret = applesmc_read_motion_sensor(SENSOR_X, &x);
503 if (ret)
504 goto out;
505 ret = applesmc_read_motion_sensor(SENSOR_Y, &y);
506 if (ret)
507 goto out;
508 ret = applesmc_read_motion_sensor(SENSOR_Z, &z);
509 if (ret)
510 goto out;
511
512out:
513 mutex_unlock(&applesmc_lock);
514 if (ret)
515 return ret;
516 else
517 return snprintf(buf, PAGE_SIZE, "(%d,%d,%d)\n", x, y, z);
518}
519
520static ssize_t applesmc_light_show(struct device *dev,
521 struct device_attribute *attr, char *sysfsbuf)
522{
523 int ret;
524 u8 left = 0, right = 0;
525 u8 buffer[6];
526
527 mutex_lock(&applesmc_lock);
528
529 ret = applesmc_read_key(LIGHT_SENSOR_LEFT_KEY, buffer, 6);
530 left = buffer[2];
531 if (ret)
532 goto out;
533 ret = applesmc_read_key(LIGHT_SENSOR_RIGHT_KEY, buffer, 6);
534 right = buffer[2];
535
536out:
537 mutex_unlock(&applesmc_lock);
538 if (ret)
539 return ret;
540 else
541 return snprintf(sysfsbuf, PAGE_SIZE, "(%d,%d)\n", left, right);
542}
543
544/* Displays degree Celsius * 1000 */
545static ssize_t applesmc_show_temperature(struct device *dev,
546 struct device_attribute *devattr, char *sysfsbuf)
547{
548 int ret;
549 u8 buffer[2];
550 unsigned int temp;
551 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
552 const char* key =
553 temperature_sensors_sets[applesmc_temperature_set][attr->index];
554
555 mutex_lock(&applesmc_lock);
556
557 ret = applesmc_read_key(key, buffer, 2);
558 temp = buffer[0]*1000;
559 temp += (buffer[1] >> 6) * 250;
560
561 mutex_unlock(&applesmc_lock);
562
563 if (ret)
564 return ret;
565 else
566 return snprintf(sysfsbuf, PAGE_SIZE, "%u\n", temp);
567}
568
569static ssize_t applesmc_show_fan_speed(struct device *dev,
570 struct device_attribute *attr, char *sysfsbuf)
571{
572 int ret;
573 unsigned int speed = 0;
574 char newkey[5];
575 u8 buffer[2];
576 struct sensor_device_attribute_2 *sensor_attr =
577 to_sensor_dev_attr_2(attr);
578
579 newkey[0] = fan_speed_keys[sensor_attr->nr][0];
580 newkey[1] = '0' + sensor_attr->index;
581 newkey[2] = fan_speed_keys[sensor_attr->nr][2];
582 newkey[3] = fan_speed_keys[sensor_attr->nr][3];
583 newkey[4] = 0;
584
585 mutex_lock(&applesmc_lock);
586
587 ret = applesmc_read_key(newkey, buffer, 2);
588 speed = ((buffer[0] << 8 | buffer[1]) >> 2);
589
590 mutex_unlock(&applesmc_lock);
591 if (ret)
592 return ret;
593 else
594 return snprintf(sysfsbuf, PAGE_SIZE, "%u\n", speed);
595}
596
597static ssize_t applesmc_store_fan_speed(struct device *dev,
598 struct device_attribute *attr,
599 const char *sysfsbuf, size_t count)
600{
601 int ret;
602 u32 speed;
603 char newkey[5];
604 u8 buffer[2];
605 struct sensor_device_attribute_2 *sensor_attr =
606 to_sensor_dev_attr_2(attr);
607
608 speed = simple_strtoul(sysfsbuf, NULL, 10);
609
610 if (speed > 0x4000) /* Bigger than a 14-bit value */
611 return -EINVAL;
612
613 newkey[0] = fan_speed_keys[sensor_attr->nr][0];
614 newkey[1] = '0' + sensor_attr->index;
615 newkey[2] = fan_speed_keys[sensor_attr->nr][2];
616 newkey[3] = fan_speed_keys[sensor_attr->nr][3];
617 newkey[4] = 0;
618
619 mutex_lock(&applesmc_lock);
620
621 buffer[0] = (speed >> 6) & 0xff;
622 buffer[1] = (speed << 2) & 0xff;
623 ret = applesmc_write_key(newkey, buffer, 2);
624
625 mutex_unlock(&applesmc_lock);
626 if (ret)
627 return ret;
628 else
629 return count;
630}
631
632static ssize_t applesmc_show_fan_manual(struct device *dev,
633 struct device_attribute *devattr, char *sysfsbuf)
634{
635 int ret;
636 u16 manual = 0;
637 u8 buffer[2];
638 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
639
640 mutex_lock(&applesmc_lock);
641
642 ret = applesmc_read_key(FANS_MANUAL, buffer, 2);
643 manual = ((buffer[0] << 8 | buffer[1]) >> attr->index) & 0x01;
644
645 mutex_unlock(&applesmc_lock);
646 if (ret)
647 return ret;
648 else
649 return snprintf(sysfsbuf, PAGE_SIZE, "%d\n", manual);
650}
651
652static ssize_t applesmc_store_fan_manual(struct device *dev,
653 struct device_attribute *devattr,
654 const char *sysfsbuf, size_t count)
655{
656 int ret;
657 u8 buffer[2];
658 u32 input;
659 u16 val;
660 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
661
662 input = simple_strtoul(sysfsbuf, NULL, 10);
663
664 mutex_lock(&applesmc_lock);
665
666 ret = applesmc_read_key(FANS_MANUAL, buffer, 2);
667 val = (buffer[0] << 8 | buffer[1]);
668 if (ret)
669 goto out;
670
671 if (input)
672 val = val | (0x01 << attr->index);
673 else
674 val = val & ~(0x01 << attr->index);
675
676 buffer[0] = (val >> 8) & 0xFF;
677 buffer[1] = val & 0xFF;
678
679 ret = applesmc_write_key(FANS_MANUAL, buffer, 2);
680
681out:
682 mutex_unlock(&applesmc_lock);
683 if (ret)
684 return ret;
685 else
686 return count;
687}
688
689static ssize_t applesmc_show_fan_position(struct device *dev,
690 struct device_attribute *attr, char *sysfsbuf)
691{
692 int ret;
693 char newkey[5];
694 u8 buffer[17];
695 struct sensor_device_attribute_2 *sensor_attr =
696 to_sensor_dev_attr_2(attr);
697
698 newkey[0] = FAN_POSITION[0];
699 newkey[1] = '0' + sensor_attr->index;
700 newkey[2] = FAN_POSITION[2];
701 newkey[3] = FAN_POSITION[3];
702 newkey[4] = 0;
703
704 mutex_lock(&applesmc_lock);
705
706 ret = applesmc_read_key(newkey, buffer, 16);
707 buffer[16] = 0;
708
709 mutex_unlock(&applesmc_lock);
710 if (ret)
711 return ret;
712 else
713 return snprintf(sysfsbuf, PAGE_SIZE, "%s\n", buffer+4);
714}
715
716static ssize_t applesmc_calibrate_show(struct device *dev,
717 struct device_attribute *attr, char *sysfsbuf)
718{
719 return snprintf(sysfsbuf, PAGE_SIZE, "(%d,%d)\n", rest_x, rest_y);
720}
721
722static ssize_t applesmc_calibrate_store(struct device *dev,
723 struct device_attribute *attr, const char *sysfsbuf, size_t count)
724{
725 mutex_lock(&applesmc_lock);
726 applesmc_calibrate();
727 mutex_unlock(&applesmc_lock);
728
729 return count;
730}
731
732/* Store the next backlight value to be written by the work */
733static unsigned int backlight_value;
734
735static void applesmc_backlight_set(struct work_struct *work)
736{
737 u8 buffer[2];
738
739 mutex_lock(&applesmc_lock);
740 buffer[0] = backlight_value;
741 buffer[1] = 0x00;
742 applesmc_write_key(BACKLIGHT_KEY, buffer, 2);
743 mutex_unlock(&applesmc_lock);
744}
745static DECLARE_WORK(backlight_work, &applesmc_backlight_set);
746
747static void applesmc_brightness_set(struct led_classdev *led_cdev,
748 enum led_brightness value)
749{
750 int ret;
751
752 backlight_value = value;
753 ret = queue_work(applesmc_led_wq, &backlight_work);
754
755 if (debug && (!ret))
756 printk(KERN_DEBUG "applesmc: work was already on the queue.\n");
757}
758
759static ssize_t applesmc_key_count_show(struct device *dev,
760 struct device_attribute *attr, char *sysfsbuf)
761{
762 int ret;
763 u8 buffer[4];
764 u32 count;
765
766 mutex_lock(&applesmc_lock);
767
768 ret = applesmc_read_key(KEY_COUNT_KEY, buffer, 4);
769 count = ((u32)buffer[0]<<24) + ((u32)buffer[1]<<16) +
770 ((u32)buffer[2]<<8) + buffer[3];
771
772 mutex_unlock(&applesmc_lock);
773 if (ret)
774 return ret;
775 else
776 return snprintf(sysfsbuf, PAGE_SIZE, "%d\n", count);
777}
778
779static ssize_t applesmc_key_at_index_read_show(struct device *dev,
780 struct device_attribute *attr, char *sysfsbuf)
781{
782 char key[5];
783 char info[6];
784 int ret;
785
786 mutex_lock(&applesmc_lock);
787
788 ret = applesmc_get_key_at_index(key_at_index, key);
789
790 if (ret || !key[0]) {
791 mutex_unlock(&applesmc_lock);
792
793 return -EINVAL;
794 }
795
796 ret = applesmc_get_key_type(key, info);
797
798 if (ret) {
799 mutex_unlock(&applesmc_lock);
800
801 return ret;
802 }
803
804 /*
805 * info[0] maximum value (APPLESMC_MAX_DATA_LENGTH) is much lower than
806 * PAGE_SIZE, so we don't need any checks before writing to sysfsbuf.
807 */
808 ret = applesmc_read_key(key, sysfsbuf, info[0]);
809
810 mutex_unlock(&applesmc_lock);
811
812 if (!ret) {
813 return info[0];
814 }
815 else {
816 return ret;
817 }
818}
819
820static ssize_t applesmc_key_at_index_data_length_show(struct device *dev,
821 struct device_attribute *attr, char *sysfsbuf)
822{
823 char key[5];
824 char info[6];
825 int ret;
826
827 mutex_lock(&applesmc_lock);
828
829 ret = applesmc_get_key_at_index(key_at_index, key);
830
831 if (ret || !key[0]) {
832 mutex_unlock(&applesmc_lock);
833
834 return -EINVAL;
835 }
836
837 ret = applesmc_get_key_type(key, info);
838
839 mutex_unlock(&applesmc_lock);
840
841 if (!ret)
842 return snprintf(sysfsbuf, PAGE_SIZE, "%d\n", info[0]);
843 else
844 return ret;
845}
846
847static ssize_t applesmc_key_at_index_type_show(struct device *dev,
848 struct device_attribute *attr, char *sysfsbuf)
849{
850 char key[5];
851 char info[6];
852 int ret;
853
854 mutex_lock(&applesmc_lock);
855
856 ret = applesmc_get_key_at_index(key_at_index, key);
857
858 if (ret || !key[0]) {
859 mutex_unlock(&applesmc_lock);
860
861 return -EINVAL;
862 }
863
864 ret = applesmc_get_key_type(key, info);
865
866 mutex_unlock(&applesmc_lock);
867
868 if (!ret)
869 return snprintf(sysfsbuf, PAGE_SIZE, "%s\n", info+1);
870 else
871 return ret;
872}
873
874static ssize_t applesmc_key_at_index_name_show(struct device *dev,
875 struct device_attribute *attr, char *sysfsbuf)
876{
877 char key[5];
878 int ret;
879
880 mutex_lock(&applesmc_lock);
881
882 ret = applesmc_get_key_at_index(key_at_index, key);
883
884 mutex_unlock(&applesmc_lock);
885
886 if (!ret && key[0])
887 return snprintf(sysfsbuf, PAGE_SIZE, "%s\n", key);
888 else
889 return -EINVAL;
890}
891
892static ssize_t applesmc_key_at_index_show(struct device *dev,
893 struct device_attribute *attr, char *sysfsbuf)
894{
895 return snprintf(sysfsbuf, PAGE_SIZE, "%d\n", key_at_index);
896}
897
898static ssize_t applesmc_key_at_index_store(struct device *dev,
899 struct device_attribute *attr, const char *sysfsbuf, size_t count)
900{
901 mutex_lock(&applesmc_lock);
902
903 key_at_index = simple_strtoul(sysfsbuf, NULL, 10);
904
905 mutex_unlock(&applesmc_lock);
906
907 return count;
908}
909
910static struct led_classdev applesmc_backlight = {
911 .name = "smc:kbd_backlight",
912 .default_trigger = "nand-disk",
913 .brightness_set = applesmc_brightness_set,
914};
915
916static DEVICE_ATTR(position, 0444, applesmc_position_show, NULL);
917static DEVICE_ATTR(calibrate, 0644,
918 applesmc_calibrate_show, applesmc_calibrate_store);
919
920static struct attribute *accelerometer_attributes[] = {
921 &dev_attr_position.attr,
922 &dev_attr_calibrate.attr,
923 NULL
924};
925
926static const struct attribute_group accelerometer_attributes_group =
927 { .attrs = accelerometer_attributes };
928
929static DEVICE_ATTR(light, 0444, applesmc_light_show, NULL);
930
931static DEVICE_ATTR(key_count, 0444, applesmc_key_count_show, NULL);
932static DEVICE_ATTR(key_at_index, 0644,
933 applesmc_key_at_index_show, applesmc_key_at_index_store);
934static DEVICE_ATTR(key_at_index_name, 0444,
935 applesmc_key_at_index_name_show, NULL);
936static DEVICE_ATTR(key_at_index_type, 0444,
937 applesmc_key_at_index_type_show, NULL);
938static DEVICE_ATTR(key_at_index_data_length, 0444,
939 applesmc_key_at_index_data_length_show, NULL);
940static DEVICE_ATTR(key_at_index_data, 0444,
941 applesmc_key_at_index_read_show, NULL);
942
943static struct attribute *key_enumeration_attributes[] = {
944 &dev_attr_key_count.attr,
945 &dev_attr_key_at_index.attr,
946 &dev_attr_key_at_index_name.attr,
947 &dev_attr_key_at_index_type.attr,
948 &dev_attr_key_at_index_data_length.attr,
949 &dev_attr_key_at_index_data.attr,
950 NULL
951};
952
953static const struct attribute_group key_enumeration_group =
954 { .attrs = key_enumeration_attributes };
955
956/*
957 * Macro defining SENSOR_DEVICE_ATTR for a fan sysfs entries.
958 * - show actual speed
959 * - show/store minimum speed
960 * - show maximum speed
961 * - show safe speed
962 * - show/store target speed
963 * - show/store manual mode
964 */
965#define sysfs_fan_speeds_offset(offset) \
966static SENSOR_DEVICE_ATTR_2(fan##offset##_input, S_IRUGO, \
967 applesmc_show_fan_speed, NULL, 0, offset-1); \
968\
969static SENSOR_DEVICE_ATTR_2(fan##offset##_min, S_IRUGO | S_IWUSR, \
970 applesmc_show_fan_speed, applesmc_store_fan_speed, 1, offset-1); \
971\
972static SENSOR_DEVICE_ATTR_2(fan##offset##_max, S_IRUGO, \
973 applesmc_show_fan_speed, NULL, 2, offset-1); \
974\
975static SENSOR_DEVICE_ATTR_2(fan##offset##_safe, S_IRUGO, \
976 applesmc_show_fan_speed, NULL, 3, offset-1); \
977\
978static SENSOR_DEVICE_ATTR_2(fan##offset##_output, S_IRUGO | S_IWUSR, \
979 applesmc_show_fan_speed, applesmc_store_fan_speed, 4, offset-1); \
980\
981static SENSOR_DEVICE_ATTR(fan##offset##_manual, S_IRUGO | S_IWUSR, \
982 applesmc_show_fan_manual, applesmc_store_fan_manual, offset-1); \
983\
984static SENSOR_DEVICE_ATTR(fan##offset##_position, S_IRUGO, \
985 applesmc_show_fan_position, NULL, offset-1); \
986\
987static struct attribute *fan##offset##_attributes[] = { \
988 &sensor_dev_attr_fan##offset##_input.dev_attr.attr, \
989 &sensor_dev_attr_fan##offset##_min.dev_attr.attr, \
990 &sensor_dev_attr_fan##offset##_max.dev_attr.attr, \
991 &sensor_dev_attr_fan##offset##_safe.dev_attr.attr, \
992 &sensor_dev_attr_fan##offset##_output.dev_attr.attr, \
993 &sensor_dev_attr_fan##offset##_manual.dev_attr.attr, \
994 &sensor_dev_attr_fan##offset##_position.dev_attr.attr, \
995 NULL \
996};
997
998/*
999 * Create the needed functions for each fan using the macro defined above
1000 * (2 fans are supported)
1001 */
1002sysfs_fan_speeds_offset(1);
1003sysfs_fan_speeds_offset(2);
1004
1005static const struct attribute_group fan_attribute_groups[] = {
1006 { .attrs = fan1_attributes },
1007 { .attrs = fan2_attributes }
1008};
1009
1010/*
1011 * Temperature sensors sysfs entries.
1012 */
1013static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO,
1014 applesmc_show_temperature, NULL, 0);
1015static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO,
1016 applesmc_show_temperature, NULL, 1);
1017static SENSOR_DEVICE_ATTR(temp3_input, S_IRUGO,
1018 applesmc_show_temperature, NULL, 2);
1019static SENSOR_DEVICE_ATTR(temp4_input, S_IRUGO,
1020 applesmc_show_temperature, NULL, 3);
1021static SENSOR_DEVICE_ATTR(temp5_input, S_IRUGO,
1022 applesmc_show_temperature, NULL, 4);
1023static SENSOR_DEVICE_ATTR(temp6_input, S_IRUGO,
1024 applesmc_show_temperature, NULL, 5);
1025static SENSOR_DEVICE_ATTR(temp7_input, S_IRUGO,
1026 applesmc_show_temperature, NULL, 6);
1027static SENSOR_DEVICE_ATTR(temp8_input, S_IRUGO,
1028 applesmc_show_temperature, NULL, 7);
1029static SENSOR_DEVICE_ATTR(temp9_input, S_IRUGO,
1030 applesmc_show_temperature, NULL, 8);
1031static SENSOR_DEVICE_ATTR(temp10_input, S_IRUGO,
1032 applesmc_show_temperature, NULL, 9);
1033static SENSOR_DEVICE_ATTR(temp11_input, S_IRUGO,
1034 applesmc_show_temperature, NULL, 10);
1035static SENSOR_DEVICE_ATTR(temp12_input, S_IRUGO,
1036 applesmc_show_temperature, NULL, 11);
1037
1038static struct attribute *temperature_attributes[] = {
1039 &sensor_dev_attr_temp1_input.dev_attr.attr,
1040 &sensor_dev_attr_temp2_input.dev_attr.attr,
1041 &sensor_dev_attr_temp3_input.dev_attr.attr,
1042 &sensor_dev_attr_temp4_input.dev_attr.attr,
1043 &sensor_dev_attr_temp5_input.dev_attr.attr,
1044 &sensor_dev_attr_temp6_input.dev_attr.attr,
1045 &sensor_dev_attr_temp7_input.dev_attr.attr,
1046 &sensor_dev_attr_temp8_input.dev_attr.attr,
1047 &sensor_dev_attr_temp9_input.dev_attr.attr,
1048 &sensor_dev_attr_temp10_input.dev_attr.attr,
1049 &sensor_dev_attr_temp11_input.dev_attr.attr,
1050 &sensor_dev_attr_temp12_input.dev_attr.attr,
1051 NULL
1052};
1053
1054static const struct attribute_group temperature_attributes_group =
1055 { .attrs = temperature_attributes };
1056
1057/* Module stuff */
1058
1059/*
1060 * applesmc_dmi_match - found a match. return one, short-circuiting the hunt.
1061 */
1062static int applesmc_dmi_match(struct dmi_system_id *id)
1063{
1064 int i = 0;
1065 struct dmi_match_data* dmi_data = id->driver_data;
1066 printk(KERN_INFO "applesmc: %s detected:\n", id->ident);
1067 applesmc_accelerometer = dmi_data->accelerometer;
1068 printk(KERN_INFO "applesmc: - Model %s accelerometer\n",
1069 applesmc_accelerometer ? "with" : "without");
1070 applesmc_light = dmi_data->light;
1071 printk(KERN_INFO "applesmc: - Model %s light sensors and backlight\n",
1072 applesmc_light ? "with" : "without");
1073
1074 applesmc_temperature_set = dmi_data->temperature_set;
1075 while (temperature_sensors_sets[applesmc_temperature_set][i] != NULL)
1076 i++;
1077 printk(KERN_INFO "applesmc: - Model with %d temperature sensors\n", i);
1078 return 1;
1079}
1080
1081/* Create accelerometer ressources */
1082static int applesmc_create_accelerometer(void)
1083{
1084 int ret;
1085
1086 ret = sysfs_create_group(&pdev->dev.kobj,
1087 &accelerometer_attributes_group);
1088 if (ret)
1089 goto out;
1090
1091 applesmc_idev = input_allocate_device();
1092 if (!applesmc_idev) {
1093 ret = -ENOMEM;
1094 goto out_sysfs;
1095 }
1096
1097 /* initial calibrate for the input device */
1098 applesmc_calibrate();
1099
1100 /* initialize the input class */
1101 applesmc_idev->name = "applesmc";
1102 applesmc_idev->id.bustype = BUS_HOST;
1103 applesmc_idev->cdev.dev = &pdev->dev;
1104 applesmc_idev->evbit[0] = BIT(EV_ABS);
1105 applesmc_idev->open = applesmc_idev_open;
1106 applesmc_idev->close = applesmc_idev_close;
1107 input_set_abs_params(applesmc_idev, ABS_X,
1108 -256, 256, APPLESMC_INPUT_FUZZ, APPLESMC_INPUT_FLAT);
1109 input_set_abs_params(applesmc_idev, ABS_Y,
1110 -256, 256, APPLESMC_INPUT_FUZZ, APPLESMC_INPUT_FLAT);
1111
1112 ret = input_register_device(applesmc_idev);
1113 if (ret)
1114 goto out_idev;
1115
1116 /* start up our timer for the input device */
1117 init_timer(&applesmc_timer);
1118 applesmc_timer.function = applesmc_idev_poll;
1119 applesmc_timer.expires = jiffies + APPLESMC_POLL_PERIOD;
1120
1121 return 0;
1122
1123out_idev:
1124 input_free_device(applesmc_idev);
1125
1126out_sysfs:
1127 sysfs_remove_group(&pdev->dev.kobj, &accelerometer_attributes_group);
1128
1129out:
1130 printk(KERN_WARNING "applesmc: driver init failed (ret=%d)!\n", ret);
1131 return ret;
1132}
1133
1134/* Release all ressources used by the accelerometer */
1135static void applesmc_release_accelerometer(void)
1136{
1137 del_timer_sync(&applesmc_timer);
1138 input_unregister_device(applesmc_idev);
1139 sysfs_remove_group(&pdev->dev.kobj, &accelerometer_attributes_group);
1140}
1141
1142static __initdata struct dmi_match_data applesmc_dmi_data[] = {
1143/* MacBook Pro: accelerometer, backlight and temperature set 0 */
1144 { .accelerometer = 1, .light = 1, .temperature_set = 0 },
1145/* MacBook: accelerometer and temperature set 0 */
1146 { .accelerometer = 1, .light = 0, .temperature_set = 0 },
1147/* MacBook: temperature set 1 */
1148 { .accelerometer = 0, .light = 0, .temperature_set = 1 }
1149};
1150
1151/* Note that DMI_MATCH(...,"MacBook") will match "MacBookPro1,1".
1152 * So we need to put "Apple MacBook Pro" before "Apple MacBook". */
1153static __initdata struct dmi_system_id applesmc_whitelist[] = {
1154 { applesmc_dmi_match, "Apple MacBook Pro", {
1155 DMI_MATCH(DMI_BOARD_VENDOR,"Apple"),
1156 DMI_MATCH(DMI_PRODUCT_NAME,"MacBookPro") },
1157 (void*)&applesmc_dmi_data[0]},
1158 { applesmc_dmi_match, "Apple MacBook", {
1159 DMI_MATCH(DMI_BOARD_VENDOR,"Apple"),
1160 DMI_MATCH(DMI_PRODUCT_NAME,"MacBook") },
1161 (void*)&applesmc_dmi_data[1]},
1162 { applesmc_dmi_match, "Apple Macmini", {
1163 DMI_MATCH(DMI_BOARD_VENDOR,"Apple"),
1164 DMI_MATCH(DMI_PRODUCT_NAME,"Macmini") },
1165 (void*)&applesmc_dmi_data[2]},
1166 { .ident = NULL }
1167};
1168
1169static int __init applesmc_init(void)
1170{
1171 int ret;
1172 int count;
1173 int i;
1174
1175 mutex_init(&applesmc_lock);
1176
1177 if (!dmi_check_system(applesmc_whitelist)) {
1178 printk(KERN_WARNING "applesmc: supported laptop not found!\n");
1179 ret = -ENODEV;
1180 goto out;
1181 }
1182
1183 if (!request_region(APPLESMC_DATA_PORT, APPLESMC_NR_PORTS,
1184 "applesmc")) {
1185 ret = -ENXIO;
1186 goto out;
1187 }
1188
1189 ret = platform_driver_register(&applesmc_driver);
1190 if (ret)
1191 goto out_region;
1192
1193 pdev = platform_device_register_simple("applesmc", -1, NULL, 0);
1194 if (IS_ERR(pdev)) {
1195 ret = PTR_ERR(pdev);
1196 goto out_driver;
1197 }
1198
1199 /* Create key enumeration sysfs files */
1200 ret = sysfs_create_group(&pdev->dev.kobj, &key_enumeration_group);
1201 if (ret)
1202 goto out_device;
1203
1204 /* create fan files */
1205 count = applesmc_get_fan_count();
1206 if (count < 0) {
1207 printk(KERN_ERR "applesmc: Cannot get the number of fans.\n");
1208 } else {
1209 printk(KERN_INFO "applesmc: %d fans found.\n", count);
1210
1211 switch (count) {
1212 default:
1213 printk(KERN_WARNING "applesmc: More than 2 fans found,"
1214 " but at most 2 fans are supported"
1215 " by the driver.\n");
1216 case 2:
1217 ret = sysfs_create_group(&pdev->dev.kobj,
1218 &fan_attribute_groups[1]);
1219 if (ret)
1220 goto out_key_enumeration;
1221 case 1:
1222 ret = sysfs_create_group(&pdev->dev.kobj,
1223 &fan_attribute_groups[0]);
1224 if (ret)
1225 goto out_fan_1;
1226 case 0:
1227 ;
1228 }
1229 }
1230
1231 for (i = 0;
1232 temperature_sensors_sets[applesmc_temperature_set][i] != NULL;
1233 i++) {
1234 if (temperature_attributes[i] == NULL) {
1235 printk(KERN_ERR "applesmc: More temperature sensors "
1236 "in temperature_sensors_sets (at least %i)"
1237 "than available sysfs files in "
1238 "temperature_attributes (%i), please report "
1239 "this bug.\n", i, i-1);
1240 goto out_temperature;
1241 }
1242 ret = sysfs_create_file(&pdev->dev.kobj,
1243 temperature_attributes[i]);
1244 if (ret)
1245 goto out_temperature;
1246 }
1247
1248 if (applesmc_accelerometer) {
1249 ret = applesmc_create_accelerometer();
1250 if (ret)
1251 goto out_temperature;
1252 }
1253
1254 if (applesmc_light) {
1255 /* Add light sensor file */
1256 ret = sysfs_create_file(&pdev->dev.kobj, &dev_attr_light.attr);
1257 if (ret)
1258 goto out_accelerometer;
1259
1260 /* Create the workqueue */
1261 applesmc_led_wq = create_singlethread_workqueue("applesmc-led");
1262 if (!applesmc_led_wq) {
1263 ret = -ENOMEM;
1264 goto out_light_sysfs;
1265 }
1266
1267 /* register as a led device */
1268 ret = led_classdev_register(&pdev->dev, &applesmc_backlight);
1269 if (ret < 0)
1270 goto out_light_wq;
1271 }
1272
1273 hwmon_class_dev = hwmon_device_register(&pdev->dev);
1274 if (IS_ERR(hwmon_class_dev)) {
1275 ret = PTR_ERR(hwmon_class_dev);
1276 goto out_light_ledclass;
1277 }
1278
1279 printk(KERN_INFO "applesmc: driver successfully loaded.\n");
1280
1281 return 0;
1282
1283out_light_ledclass:
1284 if (applesmc_light)
1285 led_classdev_unregister(&applesmc_backlight);
1286out_light_wq:
1287 if (applesmc_light)
1288 destroy_workqueue(applesmc_led_wq);
1289out_light_sysfs:
1290 if (applesmc_light)
1291 sysfs_remove_file(&pdev->dev.kobj, &dev_attr_light.attr);
1292out_accelerometer:
1293 if (applesmc_accelerometer)
1294 applesmc_release_accelerometer();
1295out_temperature:
1296 sysfs_remove_group(&pdev->dev.kobj, &temperature_attributes_group);
1297 sysfs_remove_group(&pdev->dev.kobj, &fan_attribute_groups[0]);
1298out_fan_1:
1299 sysfs_remove_group(&pdev->dev.kobj, &fan_attribute_groups[1]);
1300out_key_enumeration:
1301 sysfs_remove_group(&pdev->dev.kobj, &key_enumeration_group);
1302out_device:
1303 platform_device_unregister(pdev);
1304out_driver:
1305 platform_driver_unregister(&applesmc_driver);
1306out_region:
1307 release_region(APPLESMC_DATA_PORT, APPLESMC_NR_PORTS);
1308out:
1309 printk(KERN_WARNING "applesmc: driver init failed (ret=%d)!\n", ret);
1310 return ret;
1311}
1312
1313static void __exit applesmc_exit(void)
1314{
1315 hwmon_device_unregister(hwmon_class_dev);
1316 if (applesmc_light) {
1317 led_classdev_unregister(&applesmc_backlight);
1318 destroy_workqueue(applesmc_led_wq);
1319 sysfs_remove_file(&pdev->dev.kobj, &dev_attr_light.attr);
1320 }
1321 if (applesmc_accelerometer)
1322 applesmc_release_accelerometer();
1323 sysfs_remove_group(&pdev->dev.kobj, &temperature_attributes_group);
1324 sysfs_remove_group(&pdev->dev.kobj, &fan_attribute_groups[0]);
1325 sysfs_remove_group(&pdev->dev.kobj, &fan_attribute_groups[1]);
1326 sysfs_remove_group(&pdev->dev.kobj, &key_enumeration_group);
1327 platform_device_unregister(pdev);
1328 platform_driver_unregister(&applesmc_driver);
1329 release_region(APPLESMC_DATA_PORT, APPLESMC_NR_PORTS);
1330
1331 printk(KERN_INFO "applesmc: driver unloaded.\n");
1332}
1333
1334module_init(applesmc_init);
1335module_exit(applesmc_exit);
1336
1337MODULE_AUTHOR("Nicolas Boichat");
1338MODULE_DESCRIPTION("Apple SMC");
1339MODULE_LICENSE("GPL v2");
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-16 10:50:56 -0500