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Avoid beyond bounds copy while caching ACL
[zen-stable.git] / drivers / hwmon / it87.c
blob0054d6f9cec95e4645608c7fec6fde4f646344ac
1 /*
2 * it87.c - Part of lm_sensors, Linux kernel modules for hardware
3 * monitoring.
4 *
5 * The IT8705F is an LPC-based Super I/O part that contains UARTs, a
6 * parallel port, an IR port, a MIDI port, a floppy controller, etc., in
7 * addition to an Environment Controller (Enhanced Hardware Monitor and
8 * Fan Controller)
9 *
10 * This driver supports only the Environment Controller in the IT8705F and
11 * similar parts. The other devices are supported by different drivers.
12 *
13 * Supports: IT8705F Super I/O chip w/LPC interface
14 * IT8712F Super I/O chip w/LPC interface
15 * IT8716F Super I/O chip w/LPC interface
16 * IT8718F Super I/O chip w/LPC interface
17 * IT8720F Super I/O chip w/LPC interface
18 * IT8721F Super I/O chip w/LPC interface
19 * IT8726F Super I/O chip w/LPC interface
20 * IT8728F Super I/O chip w/LPC interface
21 * IT8758E Super I/O chip w/LPC interface
22 * Sis950 A clone of the IT8705F
23 *
24 * Copyright (C) 2001 Chris Gauthron
25 * Copyright (C) 2005-2010 Jean Delvare <khali@linux-fr.org>
26 *
27 * This program is free software; you can redistribute it and/or modify
28 * it under the terms of the GNU General Public License as published by
29 * the Free Software Foundation; either version 2 of the License, or
30 * (at your option) any later version.
31 *
32 * This program is distributed in the hope that it will be useful,
33 * but WITHOUT ANY WARRANTY; without even the implied warranty of
34 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
35 * GNU General Public License for more details.
36 *
37 * You should have received a copy of the GNU General Public License
38 * along with this program; if not, write to the Free Software
39 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
40 */
41
42 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
43
44 #include <linux/module.h>
45 #include <linux/init.h>
46 #include <linux/slab.h>
47 #include <linux/jiffies.h>
48 #include <linux/platform_device.h>
49 #include <linux/hwmon.h>
50 #include <linux/hwmon-sysfs.h>
51 #include <linux/hwmon-vid.h>
52 #include <linux/err.h>
53 #include <linux/mutex.h>
54 #include <linux/sysfs.h>
55 #include <linux/string.h>
56 #include <linux/dmi.h>
57 #include <linux/acpi.h>
58 #include <linux/io.h>
59
60 #define DRVNAME "it87"
61
62 enum chips { it87, it8712, it8716, it8718, it8720, it8721, it8728 };
63
64 static unsigned short force_id;
65 module_param(force_id, ushort, 0);
66 MODULE_PARM_DESC(force_id, "Override the detected device ID");
67
68 static struct platform_device *pdev;
69
70 #define REG 0x2e /* The register to read/write */
71 #define DEV 0x07 /* Register: Logical device select */
72 #define VAL 0x2f /* The value to read/write */
73 #define PME 0x04 /* The device with the fan registers in it */
74
75 /* The device with the IT8718F/IT8720F VID value in it */
76 #define GPIO 0x07
77
78 #define DEVID 0x20 /* Register: Device ID */
79 #define DEVREV 0x22 /* Register: Device Revision */
80
81 static inline int superio_inb(int reg)
82 {
83 outb(reg, REG);
84 return inb(VAL);
85 }
86
87 static inline void superio_outb(int reg, int val)
88 {
89 outb(reg, REG);
90 outb(val, VAL);
91 }
92
93 static int superio_inw(int reg)
94 {
95 int val;
96 outb(reg++, REG);
97 val = inb(VAL) << 8;
98 outb(reg, REG);
99 val |= inb(VAL);
100 return val;
101 }
102
103 static inline void superio_select(int ldn)
104 {
105 outb(DEV, REG);
106 outb(ldn, VAL);
107 }
108
109 static inline int superio_enter(void)
110 {
111 /*
112 * Try to reserve REG and REG + 1 for exclusive access.
113 */
114 if (!request_muxed_region(REG, 2, DRVNAME))
115 return -EBUSY;
116
117 outb(0x87, REG);
118 outb(0x01, REG);
119 outb(0x55, REG);
120 outb(0x55, REG);
121 return 0;
122 }
123
124 static inline void superio_exit(void)
125 {
126 outb(0x02, REG);
127 outb(0x02, VAL);
128 release_region(REG, 2);
129 }
130
131 /* Logical device 4 registers */
132 #define IT8712F_DEVID 0x8712
133 #define IT8705F_DEVID 0x8705
134 #define IT8716F_DEVID 0x8716
135 #define IT8718F_DEVID 0x8718
136 #define IT8720F_DEVID 0x8720
137 #define IT8721F_DEVID 0x8721
138 #define IT8726F_DEVID 0x8726
139 #define IT8728F_DEVID 0x8728
140 #define IT87_ACT_REG 0x30
141 #define IT87_BASE_REG 0x60
142
143 /* Logical device 7 registers (IT8712F and later) */
144 #define IT87_SIO_GPIO3_REG 0x27
145 #define IT87_SIO_GPIO5_REG 0x29
146 #define IT87_SIO_PINX2_REG 0x2c /* Pin selection */
147 #define IT87_SIO_VID_REG 0xfc /* VID value */
148 #define IT87_SIO_BEEP_PIN_REG 0xf6 /* Beep pin mapping */
149
150 /* Update battery voltage after every reading if true */
151 static bool update_vbat;
152
153 /* Not all BIOSes properly configure the PWM registers */
154 static bool fix_pwm_polarity;
155
156 /* Many IT87 constants specified below */
157
158 /* Length of ISA address segment */
159 #define IT87_EXTENT 8
160
161 /* Length of ISA address segment for Environmental Controller */
162 #define IT87_EC_EXTENT 2
163
164 /* Offset of EC registers from ISA base address */
165 #define IT87_EC_OFFSET 5
166
167 /* Where are the ISA address/data registers relative to the EC base address */
168 #define IT87_ADDR_REG_OFFSET 0
169 #define IT87_DATA_REG_OFFSET 1
170
171 /*----- The IT87 registers -----*/
172
173 #define IT87_REG_CONFIG 0x00
174
175 #define IT87_REG_ALARM1 0x01
176 #define IT87_REG_ALARM2 0x02
177 #define IT87_REG_ALARM3 0x03
178
179 /* The IT8718F and IT8720F have the VID value in a different register, in
180 Super-I/O configuration space. */
181 #define IT87_REG_VID 0x0a
182 /* The IT8705F and IT8712F earlier than revision 0x08 use register 0x0b
183 for fan divisors. Later IT8712F revisions must use 16-bit tachometer
184 mode. */
185 #define IT87_REG_FAN_DIV 0x0b
186 #define IT87_REG_FAN_16BIT 0x0c
187
188 /* Monitors: 9 voltage (0 to 7, battery), 3 temp (1 to 3), 3 fan (1 to 3) */
189
190 static const u8 IT87_REG_FAN[] = { 0x0d, 0x0e, 0x0f, 0x80, 0x82 };
191 static const u8 IT87_REG_FAN_MIN[] = { 0x10, 0x11, 0x12, 0x84, 0x86 };
192 static const u8 IT87_REG_FANX[] = { 0x18, 0x19, 0x1a, 0x81, 0x83 };
193 static const u8 IT87_REG_FANX_MIN[] = { 0x1b, 0x1c, 0x1d, 0x85, 0x87 };
194 #define IT87_REG_FAN_MAIN_CTRL 0x13
195 #define IT87_REG_FAN_CTL 0x14
196 #define IT87_REG_PWM(nr) (0x15 + (nr))
197 #define IT87_REG_PWM_DUTY(nr) (0x63 + (nr) * 8)
198
199 #define IT87_REG_VIN(nr) (0x20 + (nr))
200 #define IT87_REG_TEMP(nr) (0x29 + (nr))
201
202 #define IT87_REG_VIN_MAX(nr) (0x30 + (nr) * 2)
203 #define IT87_REG_VIN_MIN(nr) (0x31 + (nr) * 2)
204 #define IT87_REG_TEMP_HIGH(nr) (0x40 + (nr) * 2)
205 #define IT87_REG_TEMP_LOW(nr) (0x41 + (nr) * 2)
206
207 #define IT87_REG_VIN_ENABLE 0x50
208 #define IT87_REG_TEMP_ENABLE 0x51
209 #define IT87_REG_BEEP_ENABLE 0x5c
210
211 #define IT87_REG_CHIPID 0x58
212
213 #define IT87_REG_AUTO_TEMP(nr, i) (0x60 + (nr) * 8 + (i))
214 #define IT87_REG_AUTO_PWM(nr, i) (0x65 + (nr) * 8 + (i))
215
216
217 struct it87_sio_data {
218 enum chips type;
219 /* Values read from Super-I/O config space */
220 u8 revision;
221 u8 vid_value;
222 u8 beep_pin;
223 u8 internal; /* Internal sensors can be labeled */
224 /* Features skipped based on config or DMI */
225 u8 skip_vid;
226 u8 skip_fan;
227 u8 skip_pwm;
228 };
229
230 /* For each registered chip, we need to keep some data in memory.
231 The structure is dynamically allocated. */
232 struct it87_data {
233 struct device *hwmon_dev;
234 enum chips type;
235 u8 revision;
236
237 unsigned short addr;
238 const char *name;
239 struct mutex update_lock;
240 char valid; /* !=0 if following fields are valid */
241 unsigned long last_updated; /* In jiffies */
242
243 u16 in_scaled; /* Internal voltage sensors are scaled */
244 u8 in[9]; /* Register value */
245 u8 in_max[8]; /* Register value */
246 u8 in_min[8]; /* Register value */
247 u8 has_fan; /* Bitfield, fans enabled */
248 u16 fan[5]; /* Register values, possibly combined */
249 u16 fan_min[5]; /* Register values, possibly combined */
250 s8 temp[3]; /* Register value */
251 s8 temp_high[3]; /* Register value */
252 s8 temp_low[3]; /* Register value */
253 u8 sensor; /* Register value */
254 u8 fan_div[3]; /* Register encoding, shifted right */
255 u8 vid; /* Register encoding, combined */
256 u8 vrm;
257 u32 alarms; /* Register encoding, combined */
258 u8 beeps; /* Register encoding */
259 u8 fan_main_ctrl; /* Register value */
260 u8 fan_ctl; /* Register value */
261
262 /* The following 3 arrays correspond to the same registers up to
263 * the IT8720F. The meaning of bits 6-0 depends on the value of bit
264 * 7, and we want to preserve settings on mode changes, so we have
265 * to track all values separately.
266 * Starting with the IT8721F, the manual PWM duty cycles are stored
267 * in separate registers (8-bit values), so the separate tracking
268 * is no longer needed, but it is still done to keep the driver
269 * simple. */
270 u8 pwm_ctrl[3]; /* Register value */
271 u8 pwm_duty[3]; /* Manual PWM value set by user */
272 u8 pwm_temp_map[3]; /* PWM to temp. chan. mapping (bits 1-0) */
273
274 /* Automatic fan speed control registers */
275 u8 auto_pwm[3][4]; /* [nr][3] is hard-coded */
276 s8 auto_temp[3][5]; /* [nr][0] is point1_temp_hyst */
277 };
278
279 static inline int has_12mv_adc(const struct it87_data *data)
280 {
281 /*
282 * IT8721F and later have a 12 mV ADC, also with internal scaling
283 * on selected inputs.
284 */
285 return data->type == it8721
286 || data->type == it8728;
287 }
288
289 static inline int has_newer_autopwm(const struct it87_data *data)
290 {
291 /*
292 * IT8721F and later have separate registers for the temperature
293 * mapping and the manual duty cycle.
294 */
295 return data->type == it8721
296 || data->type == it8728;
297 }
298
299 static u8 in_to_reg(const struct it87_data *data, int nr, long val)
300 {
301 long lsb;
302
303 if (has_12mv_adc(data)) {
304 if (data->in_scaled & (1 << nr))
305 lsb = 24;
306 else
307 lsb = 12;
308 } else
309 lsb = 16;
310
311 val = DIV_ROUND_CLOSEST(val, lsb);
312 return SENSORS_LIMIT(val, 0, 255);
313 }
314
315 static int in_from_reg(const struct it87_data *data, int nr, int val)
316 {
317 if (has_12mv_adc(data)) {
318 if (data->in_scaled & (1 << nr))
319 return val * 24;
320 else
321 return val * 12;
322 } else
323 return val * 16;
324 }
325
326 static inline u8 FAN_TO_REG(long rpm, int div)
327 {
328 if (rpm == 0)
329 return 255;
330 rpm = SENSORS_LIMIT(rpm, 1, 1000000);
331 return SENSORS_LIMIT((1350000 + rpm * div / 2) / (rpm * div), 1,
332 254);
333 }
334
335 static inline u16 FAN16_TO_REG(long rpm)
336 {
337 if (rpm == 0)
338 return 0xffff;
339 return SENSORS_LIMIT((1350000 + rpm) / (rpm * 2), 1, 0xfffe);
340 }
341
342 #define FAN_FROM_REG(val, div) ((val) == 0 ? -1 : (val) == 255 ? 0 : \
343 1350000 / ((val) * (div)))
344 /* The divider is fixed to 2 in 16-bit mode */
345 #define FAN16_FROM_REG(val) ((val) == 0 ? -1 : (val) == 0xffff ? 0 : \
346 1350000 / ((val) * 2))
347
348 #define TEMP_TO_REG(val) (SENSORS_LIMIT(((val) < 0 ? (((val) - 500) / 1000) : \
349 ((val) + 500) / 1000), -128, 127))
350 #define TEMP_FROM_REG(val) ((val) * 1000)
351
352 static u8 pwm_to_reg(const struct it87_data *data, long val)
353 {
354 if (has_newer_autopwm(data))
355 return val;
356 else
357 return val >> 1;
358 }
359
360 static int pwm_from_reg(const struct it87_data *data, u8 reg)
361 {
362 if (has_newer_autopwm(data))
363 return reg;
364 else
365 return (reg & 0x7f) << 1;
366 }
367
368
369 static int DIV_TO_REG(int val)
370 {
371 int answer = 0;
372 while (answer < 7 && (val >>= 1))
373 answer++;
374 return answer;
375 }
376 #define DIV_FROM_REG(val) (1 << (val))
377
378 static const unsigned int pwm_freq[8] = {
379 48000000 / 128,
380 24000000 / 128,
381 12000000 / 128,
382 8000000 / 128,
383 6000000 / 128,
384 3000000 / 128,
385 1500000 / 128,
386 750000 / 128,
387 };
388
389 static inline int has_16bit_fans(const struct it87_data *data)
390 {
391 /* IT8705F Datasheet 0.4.1, 3h == Version G.
392 IT8712F Datasheet 0.9.1, section 8.3.5 indicates 8h == Version J.
393 These are the first revisions with 16bit tachometer support. */
394 return (data->type == it87 && data->revision >= 0x03)
395 || (data->type == it8712 && data->revision >= 0x08)
396 || data->type == it8716
397 || data->type == it8718
398 || data->type == it8720
399 || data->type == it8721
400 || data->type == it8728;
401 }
402
403 static inline int has_old_autopwm(const struct it87_data *data)
404 {
405 /* The old automatic fan speed control interface is implemented
406 by IT8705F chips up to revision F and IT8712F chips up to
407 revision G. */
408 return (data->type == it87 && data->revision < 0x03)
409 || (data->type == it8712 && data->revision < 0x08);
410 }
411
412 static int it87_probe(struct platform_device *pdev);
413 static int __devexit it87_remove(struct platform_device *pdev);
414
415 static int it87_read_value(struct it87_data *data, u8 reg);
416 static void it87_write_value(struct it87_data *data, u8 reg, u8 value);
417 static struct it87_data *it87_update_device(struct device *dev);
418 static int it87_check_pwm(struct device *dev);
419 static void it87_init_device(struct platform_device *pdev);
420
421
422 static struct platform_driver it87_driver = {
423 .driver = {
424 .owner = THIS_MODULE,
425 .name = DRVNAME,
426 },
427 .probe = it87_probe,
428 .remove = __devexit_p(it87_remove),
429 };
430
431 static ssize_t show_in(struct device *dev, struct device_attribute *attr,
432 char *buf)
433 {
434 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
435 int nr = sensor_attr->index;
436
437 struct it87_data *data = it87_update_device(dev);
438 return sprintf(buf, "%d\n", in_from_reg(data, nr, data->in[nr]));
439 }
440
441 static ssize_t show_in_min(struct device *dev, struct device_attribute *attr,
442 char *buf)
443 {
444 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
445 int nr = sensor_attr->index;
446
447 struct it87_data *data = it87_update_device(dev);
448 return sprintf(buf, "%d\n", in_from_reg(data, nr, data->in_min[nr]));
449 }
450
451 static ssize_t show_in_max(struct device *dev, struct device_attribute *attr,
452 char *buf)
453 {
454 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
455 int nr = sensor_attr->index;
456
457 struct it87_data *data = it87_update_device(dev);
458 return sprintf(buf, "%d\n", in_from_reg(data, nr, data->in_max[nr]));
459 }
460
461 static ssize_t set_in_min(struct device *dev, struct device_attribute *attr,
462 const char *buf, size_t count)
463 {
464 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
465 int nr = sensor_attr->index;
466
467 struct it87_data *data = dev_get_drvdata(dev);
468 unsigned long val;
469
470 if (kstrtoul(buf, 10, &val) < 0)
471 return -EINVAL;
472
473 mutex_lock(&data->update_lock);
474 data->in_min[nr] = in_to_reg(data, nr, val);
475 it87_write_value(data, IT87_REG_VIN_MIN(nr),
476 data->in_min[nr]);
477 mutex_unlock(&data->update_lock);
478 return count;
479 }
480 static ssize_t set_in_max(struct device *dev, struct device_attribute *attr,
481 const char *buf, size_t count)
482 {
483 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
484 int nr = sensor_attr->index;
485
486 struct it87_data *data = dev_get_drvdata(dev);
487 unsigned long val;
488
489 if (kstrtoul(buf, 10, &val) < 0)
490 return -EINVAL;
491
492 mutex_lock(&data->update_lock);
493 data->in_max[nr] = in_to_reg(data, nr, val);
494 it87_write_value(data, IT87_REG_VIN_MAX(nr),
495 data->in_max[nr]);
496 mutex_unlock(&data->update_lock);
497 return count;
498 }
499
500 #define show_in_offset(offset) \
501 static SENSOR_DEVICE_ATTR(in##offset##_input, S_IRUGO, \
502 show_in, NULL, offset);
503
504 #define limit_in_offset(offset) \
505 static SENSOR_DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \
506 show_in_min, set_in_min, offset); \
507 static SENSOR_DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \
508 show_in_max, set_in_max, offset);
509
510 show_in_offset(0);
511 limit_in_offset(0);
512 show_in_offset(1);
513 limit_in_offset(1);
514 show_in_offset(2);
515 limit_in_offset(2);
516 show_in_offset(3);
517 limit_in_offset(3);
518 show_in_offset(4);
519 limit_in_offset(4);
520 show_in_offset(5);
521 limit_in_offset(5);
522 show_in_offset(6);
523 limit_in_offset(6);
524 show_in_offset(7);
525 limit_in_offset(7);
526 show_in_offset(8);
527
528 /* 3 temperatures */
529 static ssize_t show_temp(struct device *dev, struct device_attribute *attr,
530 char *buf)
531 {
532 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
533 int nr = sensor_attr->index;
534
535 struct it87_data *data = it87_update_device(dev);
536 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[nr]));
537 }
538 static ssize_t show_temp_max(struct device *dev, struct device_attribute *attr,
539 char *buf)
540 {
541 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
542 int nr = sensor_attr->index;
543
544 struct it87_data *data = it87_update_device(dev);
545 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_high[nr]));
546 }
547 static ssize_t show_temp_min(struct device *dev, struct device_attribute *attr,
548 char *buf)
549 {
550 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
551 int nr = sensor_attr->index;
552
553 struct it87_data *data = it87_update_device(dev);
554 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_low[nr]));
555 }
556 static ssize_t set_temp_max(struct device *dev, struct device_attribute *attr,
557 const char *buf, size_t count)
558 {
559 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
560 int nr = sensor_attr->index;
561
562 struct it87_data *data = dev_get_drvdata(dev);
563 long val;
564
565 if (kstrtol(buf, 10, &val) < 0)
566 return -EINVAL;
567
568 mutex_lock(&data->update_lock);
569 data->temp_high[nr] = TEMP_TO_REG(val);
570 it87_write_value(data, IT87_REG_TEMP_HIGH(nr), data->temp_high[nr]);
571 mutex_unlock(&data->update_lock);
572 return count;
573 }
574 static ssize_t set_temp_min(struct device *dev, struct device_attribute *attr,
575 const char *buf, size_t count)
576 {
577 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
578 int nr = sensor_attr->index;
579
580 struct it87_data *data = dev_get_drvdata(dev);
581 long val;
582
583 if (kstrtol(buf, 10, &val) < 0)
584 return -EINVAL;
585
586 mutex_lock(&data->update_lock);
587 data->temp_low[nr] = TEMP_TO_REG(val);
588 it87_write_value(data, IT87_REG_TEMP_LOW(nr), data->temp_low[nr]);
589 mutex_unlock(&data->update_lock);
590 return count;
591 }
592 #define show_temp_offset(offset) \
593 static SENSOR_DEVICE_ATTR(temp##offset##_input, S_IRUGO, \
594 show_temp, NULL, offset - 1); \
595 static SENSOR_DEVICE_ATTR(temp##offset##_max, S_IRUGO | S_IWUSR, \
596 show_temp_max, set_temp_max, offset - 1); \
597 static SENSOR_DEVICE_ATTR(temp##offset##_min, S_IRUGO | S_IWUSR, \
598 show_temp_min, set_temp_min, offset - 1);
599
600 show_temp_offset(1);
601 show_temp_offset(2);
602 show_temp_offset(3);
603
604 static ssize_t show_sensor(struct device *dev, struct device_attribute *attr,
605 char *buf)
606 {
607 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
608 int nr = sensor_attr->index;
609
610 struct it87_data *data = it87_update_device(dev);
611 u8 reg = data->sensor; /* In case the value is updated while
612 we use it */
613
614 if (reg & (1 << nr))
615 return sprintf(buf, "3\n"); /* thermal diode */
616 if (reg & (8 << nr))
617 return sprintf(buf, "4\n"); /* thermistor */
618 return sprintf(buf, "0\n"); /* disabled */
619 }
620 static ssize_t set_sensor(struct device *dev, struct device_attribute *attr,
621 const char *buf, size_t count)
622 {
623 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
624 int nr = sensor_attr->index;
625
626 struct it87_data *data = dev_get_drvdata(dev);
627 long val;
628 u8 reg;
629
630 if (kstrtol(buf, 10, &val) < 0)
631 return -EINVAL;
632
633 reg = it87_read_value(data, IT87_REG_TEMP_ENABLE);
634 reg &= ~(1 << nr);
635 reg &= ~(8 << nr);
636 if (val == 2) { /* backwards compatibility */
637 dev_warn(dev, "Sensor type 2 is deprecated, please use 4 "
638 "instead\n");
639 val = 4;
640 }
641 /* 3 = thermal diode; 4 = thermistor; 0 = disabled */
642 if (val == 3)
643 reg |= 1 << nr;
644 else if (val == 4)
645 reg |= 8 << nr;
646 else if (val != 0)
647 return -EINVAL;
648
649 mutex_lock(&data->update_lock);
650 data->sensor = reg;
651 it87_write_value(data, IT87_REG_TEMP_ENABLE, data->sensor);
652 data->valid = 0; /* Force cache refresh */
653 mutex_unlock(&data->update_lock);
654 return count;
655 }
656 #define show_sensor_offset(offset) \
657 static SENSOR_DEVICE_ATTR(temp##offset##_type, S_IRUGO | S_IWUSR, \
658 show_sensor, set_sensor, offset - 1);
659
660 show_sensor_offset(1);
661 show_sensor_offset(2);
662 show_sensor_offset(3);
663
664 /* 3 Fans */
665
666 static int pwm_mode(const struct it87_data *data, int nr)
667 {
668 int ctrl = data->fan_main_ctrl & (1 << nr);
669
670 if (ctrl == 0) /* Full speed */
671 return 0;
672 if (data->pwm_ctrl[nr] & 0x80) /* Automatic mode */
673 return 2;
674 else /* Manual mode */
675 return 1;
676 }
677
678 static ssize_t show_fan(struct device *dev, struct device_attribute *attr,
679 char *buf)
680 {
681 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
682 int nr = sensor_attr->index;
683
684 struct it87_data *data = it87_update_device(dev);
685 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[nr],
686 DIV_FROM_REG(data->fan_div[nr])));
687 }
688 static ssize_t show_fan_min(struct device *dev, struct device_attribute *attr,
689 char *buf)
690 {
691 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
692 int nr = sensor_attr->index;
693
694 struct it87_data *data = it87_update_device(dev);
695 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[nr],
696 DIV_FROM_REG(data->fan_div[nr])));
697 }
698 static ssize_t show_fan_div(struct device *dev, struct device_attribute *attr,
699 char *buf)
700 {
701 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
702 int nr = sensor_attr->index;
703
704 struct it87_data *data = it87_update_device(dev);
705 return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr]));
706 }
707 static ssize_t show_pwm_enable(struct device *dev,
708 struct device_attribute *attr, char *buf)
709 {
710 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
711 int nr = sensor_attr->index;
712
713 struct it87_data *data = it87_update_device(dev);
714 return sprintf(buf, "%d\n", pwm_mode(data, nr));
715 }
716 static ssize_t show_pwm(struct device *dev, struct device_attribute *attr,
717 char *buf)
718 {
719 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
720 int nr = sensor_attr->index;
721
722 struct it87_data *data = it87_update_device(dev);
723 return sprintf(buf, "%d\n",
724 pwm_from_reg(data, data->pwm_duty[nr]));
725 }
726 static ssize_t show_pwm_freq(struct device *dev, struct device_attribute *attr,
727 char *buf)
728 {
729 struct it87_data *data = it87_update_device(dev);
730 int index = (data->fan_ctl >> 4) & 0x07;
731
732 return sprintf(buf, "%u\n", pwm_freq[index]);
733 }
734 static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr,
735 const char *buf, size_t count)
736 {
737 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
738 int nr = sensor_attr->index;
739
740 struct it87_data *data = dev_get_drvdata(dev);
741 long val;
742 u8 reg;
743
744 if (kstrtol(buf, 10, &val) < 0)
745 return -EINVAL;
746
747 mutex_lock(&data->update_lock);
748 reg = it87_read_value(data, IT87_REG_FAN_DIV);
749 switch (nr) {
750 case 0:
751 data->fan_div[nr] = reg & 0x07;
752 break;
753 case 1:
754 data->fan_div[nr] = (reg >> 3) & 0x07;
755 break;
756 case 2:
757 data->fan_div[nr] = (reg & 0x40) ? 3 : 1;
758 break;
759 }
760
761 data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr]));
762 it87_write_value(data, IT87_REG_FAN_MIN[nr], data->fan_min[nr]);
763 mutex_unlock(&data->update_lock);
764 return count;
765 }
766 static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr,
767 const char *buf, size_t count)
768 {
769 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
770 int nr = sensor_attr->index;
771
772 struct it87_data *data = dev_get_drvdata(dev);
773 unsigned long val;
774 int min;
775 u8 old;
776
777 if (kstrtoul(buf, 10, &val) < 0)
778 return -EINVAL;
779
780 mutex_lock(&data->update_lock);
781 old = it87_read_value(data, IT87_REG_FAN_DIV);
782
783 /* Save fan min limit */
784 min = FAN_FROM_REG(data->fan_min[nr], DIV_FROM_REG(data->fan_div[nr]));
785
786 switch (nr) {
787 case 0:
788 case 1:
789 data->fan_div[nr] = DIV_TO_REG(val);
790 break;
791 case 2:
792 if (val < 8)
793 data->fan_div[nr] = 1;
794 else
795 data->fan_div[nr] = 3;
796 }
797 val = old & 0x80;
798 val |= (data->fan_div[0] & 0x07);
799 val |= (data->fan_div[1] & 0x07) << 3;
800 if (data->fan_div[2] == 3)
801 val |= 0x1 << 6;
802 it87_write_value(data, IT87_REG_FAN_DIV, val);
803
804 /* Restore fan min limit */
805 data->fan_min[nr] = FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr]));
806 it87_write_value(data, IT87_REG_FAN_MIN[nr], data->fan_min[nr]);
807
808 mutex_unlock(&data->update_lock);
809 return count;
810 }
811
812 /* Returns 0 if OK, -EINVAL otherwise */
813 static int check_trip_points(struct device *dev, int nr)
814 {
815 const struct it87_data *data = dev_get_drvdata(dev);
816 int i, err = 0;
817
818 if (has_old_autopwm(data)) {
819 for (i = 0; i < 3; i++) {
820 if (data->auto_temp[nr][i] > data->auto_temp[nr][i + 1])
821 err = -EINVAL;
822 }
823 for (i = 0; i < 2; i++) {
824 if (data->auto_pwm[nr][i] > data->auto_pwm[nr][i + 1])
825 err = -EINVAL;
826 }
827 }
828
829 if (err) {
830 dev_err(dev, "Inconsistent trip points, not switching to "
831 "automatic mode\n");
832 dev_err(dev, "Adjust the trip points and try again\n");
833 }
834 return err;
835 }
836
837 static ssize_t set_pwm_enable(struct device *dev,
838 struct device_attribute *attr, const char *buf, size_t count)
839 {
840 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
841 int nr = sensor_attr->index;
842
843 struct it87_data *data = dev_get_drvdata(dev);
844 long val;
845
846 if (kstrtol(buf, 10, &val) < 0 || val < 0 || val > 2)
847 return -EINVAL;
848
849 /* Check trip points before switching to automatic mode */
850 if (val == 2) {
851 if (check_trip_points(dev, nr) < 0)
852 return -EINVAL;
853 }
854
855 mutex_lock(&data->update_lock);
856
857 if (val == 0) {
858 int tmp;
859 /* make sure the fan is on when in on/off mode */
860 tmp = it87_read_value(data, IT87_REG_FAN_CTL);
861 it87_write_value(data, IT87_REG_FAN_CTL, tmp | (1 << nr));
862 /* set on/off mode */
863 data->fan_main_ctrl &= ~(1 << nr);
864 it87_write_value(data, IT87_REG_FAN_MAIN_CTRL,
865 data->fan_main_ctrl);
866 } else {
867 if (val == 1) /* Manual mode */
868 data->pwm_ctrl[nr] = has_newer_autopwm(data) ?
869 data->pwm_temp_map[nr] :
870 data->pwm_duty[nr];
871 else /* Automatic mode */
872 data->pwm_ctrl[nr] = 0x80 | data->pwm_temp_map[nr];
873 it87_write_value(data, IT87_REG_PWM(nr), data->pwm_ctrl[nr]);
874 /* set SmartGuardian mode */
875 data->fan_main_ctrl |= (1 << nr);
876 it87_write_value(data, IT87_REG_FAN_MAIN_CTRL,
877 data->fan_main_ctrl);
878 }
879
880 mutex_unlock(&data->update_lock);
881 return count;
882 }
883 static ssize_t set_pwm(struct device *dev, struct device_attribute *attr,
884 const char *buf, size_t count)
885 {
886 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
887 int nr = sensor_attr->index;
888
889 struct it87_data *data = dev_get_drvdata(dev);
890 long val;
891
892 if (kstrtol(buf, 10, &val) < 0 || val < 0 || val > 255)
893 return -EINVAL;
894
895 mutex_lock(&data->update_lock);
896 if (has_newer_autopwm(data)) {
897 /* If we are in automatic mode, the PWM duty cycle register
898 * is read-only so we can't write the value */
899 if (data->pwm_ctrl[nr] & 0x80) {
900 mutex_unlock(&data->update_lock);
901 return -EBUSY;
902 }
903 data->pwm_duty[nr] = pwm_to_reg(data, val);
904 it87_write_value(data, IT87_REG_PWM_DUTY(nr),
905 data->pwm_duty[nr]);
906 } else {
907 data->pwm_duty[nr] = pwm_to_reg(data, val);
908 /* If we are in manual mode, write the duty cycle immediately;
909 * otherwise, just store it for later use. */
910 if (!(data->pwm_ctrl[nr] & 0x80)) {
911 data->pwm_ctrl[nr] = data->pwm_duty[nr];
912 it87_write_value(data, IT87_REG_PWM(nr),
913 data->pwm_ctrl[nr]);
914 }
915 }
916 mutex_unlock(&data->update_lock);
917 return count;
918 }
919 static ssize_t set_pwm_freq(struct device *dev,
920 struct device_attribute *attr, const char *buf, size_t count)
921 {
922 struct it87_data *data = dev_get_drvdata(dev);
923 unsigned long val;
924 int i;
925
926 if (kstrtoul(buf, 10, &val) < 0)
927 return -EINVAL;
928
929 /* Search for the nearest available frequency */
930 for (i = 0; i < 7; i++) {
931 if (val > (pwm_freq[i] + pwm_freq[i+1]) / 2)
932 break;
933 }
934
935 mutex_lock(&data->update_lock);
936 data->fan_ctl = it87_read_value(data, IT87_REG_FAN_CTL) & 0x8f;
937 data->fan_ctl |= i << 4;
938 it87_write_value(data, IT87_REG_FAN_CTL, data->fan_ctl);
939 mutex_unlock(&data->update_lock);
940
941 return count;
942 }
943 static ssize_t show_pwm_temp_map(struct device *dev,
944 struct device_attribute *attr, char *buf)
945 {
946 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
947 int nr = sensor_attr->index;
948
949 struct it87_data *data = it87_update_device(dev);
950 int map;
951
952 if (data->pwm_temp_map[nr] < 3)
953 map = 1 << data->pwm_temp_map[nr];
954 else
955 map = 0; /* Should never happen */
956 return sprintf(buf, "%d\n", map);
957 }
958 static ssize_t set_pwm_temp_map(struct device *dev,
959 struct device_attribute *attr, const char *buf, size_t count)
960 {
961 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
962 int nr = sensor_attr->index;
963
964 struct it87_data *data = dev_get_drvdata(dev);
965 long val;
966 u8 reg;
967
968 /* This check can go away if we ever support automatic fan speed
969 control on newer chips. */
970 if (!has_old_autopwm(data)) {
971 dev_notice(dev, "Mapping change disabled for safety reasons\n");
972 return -EINVAL;
973 }
974
975 if (kstrtol(buf, 10, &val) < 0)
976 return -EINVAL;
977
978 switch (val) {
979 case (1 << 0):
980 reg = 0x00;
981 break;
982 case (1 << 1):
983 reg = 0x01;
984 break;
985 case (1 << 2):
986 reg = 0x02;
987 break;
988 default:
989 return -EINVAL;
990 }
991
992 mutex_lock(&data->update_lock);
993 data->pwm_temp_map[nr] = reg;
994 /* If we are in automatic mode, write the temp mapping immediately;
995 * otherwise, just store it for later use. */
996 if (data->pwm_ctrl[nr] & 0x80) {
997 data->pwm_ctrl[nr] = 0x80 | data->pwm_temp_map[nr];
998 it87_write_value(data, IT87_REG_PWM(nr), data->pwm_ctrl[nr]);
999 }
1000 mutex_unlock(&data->update_lock);
1001 return count;
1002 }
1003
1004 static ssize_t show_auto_pwm(struct device *dev,
1005 struct device_attribute *attr, char *buf)
1006 {
1007 struct it87_data *data = it87_update_device(dev);
1008 struct sensor_device_attribute_2 *sensor_attr =
1009 to_sensor_dev_attr_2(attr);
1010 int nr = sensor_attr->nr;
1011 int point = sensor_attr->index;
1012
1013 return sprintf(buf, "%d\n",
1014 pwm_from_reg(data, data->auto_pwm[nr][point]));
1015 }
1016
1017 static ssize_t set_auto_pwm(struct device *dev,
1018 struct device_attribute *attr, const char *buf, size_t count)
1019 {
1020 struct it87_data *data = dev_get_drvdata(dev);
1021 struct sensor_device_attribute_2 *sensor_attr =
1022 to_sensor_dev_attr_2(attr);
1023 int nr = sensor_attr->nr;
1024 int point = sensor_attr->index;
1025 long val;
1026
1027 if (kstrtol(buf, 10, &val) < 0 || val < 0 || val > 255)
1028 return -EINVAL;
1029
1030 mutex_lock(&data->update_lock);
1031 data->auto_pwm[nr][point] = pwm_to_reg(data, val);
1032 it87_write_value(data, IT87_REG_AUTO_PWM(nr, point),
1033 data->auto_pwm[nr][point]);
1034 mutex_unlock(&data->update_lock);
1035 return count;
1036 }
1037
1038 static ssize_t show_auto_temp(struct device *dev,
1039 struct device_attribute *attr, char *buf)
1040 {
1041 struct it87_data *data = it87_update_device(dev);
1042 struct sensor_device_attribute_2 *sensor_attr =
1043 to_sensor_dev_attr_2(attr);
1044 int nr = sensor_attr->nr;
1045 int point = sensor_attr->index;
1046
1047 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->auto_temp[nr][point]));
1048 }
1049
1050 static ssize_t set_auto_temp(struct device *dev,
1051 struct device_attribute *attr, const char *buf, size_t count)
1052 {
1053 struct it87_data *data = dev_get_drvdata(dev);
1054 struct sensor_device_attribute_2 *sensor_attr =
1055 to_sensor_dev_attr_2(attr);
1056 int nr = sensor_attr->nr;
1057 int point = sensor_attr->index;
1058 long val;
1059
1060 if (kstrtol(buf, 10, &val) < 0 || val < -128000 || val > 127000)
1061 return -EINVAL;
1062
1063 mutex_lock(&data->update_lock);
1064 data->auto_temp[nr][point] = TEMP_TO_REG(val);
1065 it87_write_value(data, IT87_REG_AUTO_TEMP(nr, point),
1066 data->auto_temp[nr][point]);
1067 mutex_unlock(&data->update_lock);
1068 return count;
1069 }
1070
1071 #define show_fan_offset(offset) \
1072 static SENSOR_DEVICE_ATTR(fan##offset##_input, S_IRUGO, \
1073 show_fan, NULL, offset - 1); \
1074 static SENSOR_DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \
1075 show_fan_min, set_fan_min, offset - 1); \
1076 static SENSOR_DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR, \
1077 show_fan_div, set_fan_div, offset - 1);
1078
1079 show_fan_offset(1);
1080 show_fan_offset(2);
1081 show_fan_offset(3);
1082
1083 #define show_pwm_offset(offset) \
1084 static SENSOR_DEVICE_ATTR(pwm##offset##_enable, S_IRUGO | S_IWUSR, \
1085 show_pwm_enable, set_pwm_enable, offset - 1); \
1086 static SENSOR_DEVICE_ATTR(pwm##offset, S_IRUGO | S_IWUSR, \
1087 show_pwm, set_pwm, offset - 1); \
1088 static DEVICE_ATTR(pwm##offset##_freq, \
1089 (offset == 1 ? S_IRUGO | S_IWUSR : S_IRUGO), \
1090 show_pwm_freq, (offset == 1 ? set_pwm_freq : NULL)); \
1091 static SENSOR_DEVICE_ATTR(pwm##offset##_auto_channels_temp, \
1092 S_IRUGO | S_IWUSR, show_pwm_temp_map, set_pwm_temp_map, \
1093 offset - 1); \
1094 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point1_pwm, \
1095 S_IRUGO | S_IWUSR, show_auto_pwm, set_auto_pwm, \
1096 offset - 1, 0); \
1097 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point2_pwm, \
1098 S_IRUGO | S_IWUSR, show_auto_pwm, set_auto_pwm, \
1099 offset - 1, 1); \
1100 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point3_pwm, \
1101 S_IRUGO | S_IWUSR, show_auto_pwm, set_auto_pwm, \
1102 offset - 1, 2); \
1103 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point4_pwm, \
1104 S_IRUGO, show_auto_pwm, NULL, offset - 1, 3); \
1105 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point1_temp, \
1106 S_IRUGO | S_IWUSR, show_auto_temp, set_auto_temp, \
1107 offset - 1, 1); \
1108 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point1_temp_hyst, \
1109 S_IRUGO | S_IWUSR, show_auto_temp, set_auto_temp, \
1110 offset - 1, 0); \
1111 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point2_temp, \
1112 S_IRUGO | S_IWUSR, show_auto_temp, set_auto_temp, \
1113 offset - 1, 2); \
1114 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point3_temp, \
1115 S_IRUGO | S_IWUSR, show_auto_temp, set_auto_temp, \
1116 offset - 1, 3); \
1117 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point4_temp, \
1118 S_IRUGO | S_IWUSR, show_auto_temp, set_auto_temp, \
1119 offset - 1, 4);
1120
1121 show_pwm_offset(1);
1122 show_pwm_offset(2);
1123 show_pwm_offset(3);
1124
1125 /* A different set of callbacks for 16-bit fans */
1126 static ssize_t show_fan16(struct device *dev, struct device_attribute *attr,
1127 char *buf)
1128 {
1129 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
1130 int nr = sensor_attr->index;
1131 struct it87_data *data = it87_update_device(dev);
1132 return sprintf(buf, "%d\n", FAN16_FROM_REG(data->fan[nr]));
1133 }
1134
1135 static ssize_t show_fan16_min(struct device *dev, struct device_attribute *attr,
1136 char *buf)
1137 {
1138 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
1139 int nr = sensor_attr->index;
1140 struct it87_data *data = it87_update_device(dev);
1141 return sprintf(buf, "%d\n", FAN16_FROM_REG(data->fan_min[nr]));
1142 }
1143
1144 static ssize_t set_fan16_min(struct device *dev, struct device_attribute *attr,
1145 const char *buf, size_t count)
1146 {
1147 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
1148 int nr = sensor_attr->index;
1149 struct it87_data *data = dev_get_drvdata(dev);
1150 long val;
1151
1152 if (kstrtol(buf, 10, &val) < 0)
1153 return -EINVAL;
1154
1155 mutex_lock(&data->update_lock);
1156 data->fan_min[nr] = FAN16_TO_REG(val);
1157 it87_write_value(data, IT87_REG_FAN_MIN[nr],
1158 data->fan_min[nr] & 0xff);
1159 it87_write_value(data, IT87_REG_FANX_MIN[nr],
1160 data->fan_min[nr] >> 8);
1161 mutex_unlock(&data->update_lock);
1162 return count;
1163 }
1164
1165 /* We want to use the same sysfs file names as 8-bit fans, but we need
1166 different variable names, so we have to use SENSOR_ATTR instead of
1167 SENSOR_DEVICE_ATTR. */
1168 #define show_fan16_offset(offset) \
1169 static struct sensor_device_attribute sensor_dev_attr_fan##offset##_input16 \
1170 = SENSOR_ATTR(fan##offset##_input, S_IRUGO, \
1171 show_fan16, NULL, offset - 1); \
1172 static struct sensor_device_attribute sensor_dev_attr_fan##offset##_min16 \
1173 = SENSOR_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \
1174 show_fan16_min, set_fan16_min, offset - 1)
1175
1176 show_fan16_offset(1);
1177 show_fan16_offset(2);
1178 show_fan16_offset(3);
1179 show_fan16_offset(4);
1180 show_fan16_offset(5);
1181
1182 /* Alarms */
1183 static ssize_t show_alarms(struct device *dev, struct device_attribute *attr,
1184 char *buf)
1185 {
1186 struct it87_data *data = it87_update_device(dev);
1187 return sprintf(buf, "%u\n", data->alarms);
1188 }
1189 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
1190
1191 static ssize_t show_alarm(struct device *dev, struct device_attribute *attr,
1192 char *buf)
1193 {
1194 int bitnr = to_sensor_dev_attr(attr)->index;
1195 struct it87_data *data = it87_update_device(dev);
1196 return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1);
1197 }
1198
1199 static ssize_t clear_intrusion(struct device *dev, struct device_attribute
1200 *attr, const char *buf, size_t count)
1201 {
1202 struct it87_data *data = dev_get_drvdata(dev);
1203 long val;
1204 int config;
1205
1206 if (kstrtol(buf, 10, &val) < 0 || val != 0)
1207 return -EINVAL;
1208
1209 mutex_lock(&data->update_lock);
1210 config = it87_read_value(data, IT87_REG_CONFIG);
1211 if (config < 0) {
1212 count = config;
1213 } else {
1214 config |= 1 << 5;
1215 it87_write_value(data, IT87_REG_CONFIG, config);
1216 /* Invalidate cache to force re-read */
1217 data->valid = 0;
1218 }
1219 mutex_unlock(&data->update_lock);
1220
1221 return count;
1222 }
1223
1224 static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 8);
1225 static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 9);
1226 static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 10);
1227 static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 11);
1228 static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 12);
1229 static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 13);
1230 static SENSOR_DEVICE_ATTR(in6_alarm, S_IRUGO, show_alarm, NULL, 14);
1231 static SENSOR_DEVICE_ATTR(in7_alarm, S_IRUGO, show_alarm, NULL, 15);
1232 static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 0);
1233 static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 1);
1234 static SENSOR_DEVICE_ATTR(fan3_alarm, S_IRUGO, show_alarm, NULL, 2);
1235 static SENSOR_DEVICE_ATTR(fan4_alarm, S_IRUGO, show_alarm, NULL, 3);
1236 static SENSOR_DEVICE_ATTR(fan5_alarm, S_IRUGO, show_alarm, NULL, 6);
1237 static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 16);
1238 static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 17);
1239 static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL, 18);
1240 static SENSOR_DEVICE_ATTR(intrusion0_alarm, S_IRUGO | S_IWUSR,
1241 show_alarm, clear_intrusion, 4);
1242
1243 static ssize_t show_beep(struct device *dev, struct device_attribute *attr,
1244 char *buf)
1245 {
1246 int bitnr = to_sensor_dev_attr(attr)->index;
1247 struct it87_data *data = it87_update_device(dev);
1248 return sprintf(buf, "%u\n", (data->beeps >> bitnr) & 1);
1249 }
1250 static ssize_t set_beep(struct device *dev, struct device_attribute *attr,
1251 const char *buf, size_t count)
1252 {
1253 int bitnr = to_sensor_dev_attr(attr)->index;
1254 struct it87_data *data = dev_get_drvdata(dev);
1255 long val;
1256
1257 if (kstrtol(buf, 10, &val) < 0
1258 || (val != 0 && val != 1))
1259 return -EINVAL;
1260
1261 mutex_lock(&data->update_lock);
1262 data->beeps = it87_read_value(data, IT87_REG_BEEP_ENABLE);
1263 if (val)
1264 data->beeps |= (1 << bitnr);
1265 else
1266 data->beeps &= ~(1 << bitnr);
1267 it87_write_value(data, IT87_REG_BEEP_ENABLE, data->beeps);
1268 mutex_unlock(&data->update_lock);
1269 return count;
1270 }
1271
1272 static SENSOR_DEVICE_ATTR(in0_beep, S_IRUGO | S_IWUSR,
1273 show_beep, set_beep, 1);
1274 static SENSOR_DEVICE_ATTR(in1_beep, S_IRUGO, show_beep, NULL, 1);
1275 static SENSOR_DEVICE_ATTR(in2_beep, S_IRUGO, show_beep, NULL, 1);
1276 static SENSOR_DEVICE_ATTR(in3_beep, S_IRUGO, show_beep, NULL, 1);
1277 static SENSOR_DEVICE_ATTR(in4_beep, S_IRUGO, show_beep, NULL, 1);
1278 static SENSOR_DEVICE_ATTR(in5_beep, S_IRUGO, show_beep, NULL, 1);
1279 static SENSOR_DEVICE_ATTR(in6_beep, S_IRUGO, show_beep, NULL, 1);
1280 static SENSOR_DEVICE_ATTR(in7_beep, S_IRUGO, show_beep, NULL, 1);
1281 /* fanX_beep writability is set later */
1282 static SENSOR_DEVICE_ATTR(fan1_beep, S_IRUGO, show_beep, set_beep, 0);
1283 static SENSOR_DEVICE_ATTR(fan2_beep, S_IRUGO, show_beep, set_beep, 0);
1284 static SENSOR_DEVICE_ATTR(fan3_beep, S_IRUGO, show_beep, set_beep, 0);
1285 static SENSOR_DEVICE_ATTR(fan4_beep, S_IRUGO, show_beep, set_beep, 0);
1286 static SENSOR_DEVICE_ATTR(fan5_beep, S_IRUGO, show_beep, set_beep, 0);
1287 static SENSOR_DEVICE_ATTR(temp1_beep, S_IRUGO | S_IWUSR,
1288 show_beep, set_beep, 2);
1289 static SENSOR_DEVICE_ATTR(temp2_beep, S_IRUGO, show_beep, NULL, 2);
1290 static SENSOR_DEVICE_ATTR(temp3_beep, S_IRUGO, show_beep, NULL, 2);
1291
1292 static ssize_t show_vrm_reg(struct device *dev, struct device_attribute *attr,
1293 char *buf)
1294 {
1295 struct it87_data *data = dev_get_drvdata(dev);
1296 return sprintf(buf, "%u\n", data->vrm);
1297 }
1298 static ssize_t store_vrm_reg(struct device *dev, struct device_attribute *attr,
1299 const char *buf, size_t count)
1300 {
1301 struct it87_data *data = dev_get_drvdata(dev);
1302 unsigned long val;
1303
1304 if (kstrtoul(buf, 10, &val) < 0)
1305 return -EINVAL;
1306
1307 data->vrm = val;
1308
1309 return count;
1310 }
1311 static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm_reg, store_vrm_reg);
1312
1313 static ssize_t show_vid_reg(struct device *dev, struct device_attribute *attr,
1314 char *buf)
1315 {
1316 struct it87_data *data = it87_update_device(dev);
1317 return sprintf(buf, "%ld\n", (long) vid_from_reg(data->vid, data->vrm));
1318 }
1319 static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid_reg, NULL);
1320
1321 static ssize_t show_label(struct device *dev, struct device_attribute *attr,
1322 char *buf)
1323 {
1324 static const char *labels[] = {
1325 "+5V",
1326 "5VSB",
1327 "Vbat",
1328 };
1329 static const char *labels_it8721[] = {
1330 "+3.3V",
1331 "3VSB",
1332 "Vbat",
1333 };
1334 struct it87_data *data = dev_get_drvdata(dev);
1335 int nr = to_sensor_dev_attr(attr)->index;
1336
1337 return sprintf(buf, "%s\n", has_12mv_adc(data) ? labels_it8721[nr]
1338 : labels[nr]);
1339 }
1340 static SENSOR_DEVICE_ATTR(in3_label, S_IRUGO, show_label, NULL, 0);
1341 static SENSOR_DEVICE_ATTR(in7_label, S_IRUGO, show_label, NULL, 1);
1342 static SENSOR_DEVICE_ATTR(in8_label, S_IRUGO, show_label, NULL, 2);
1343
1344 static ssize_t show_name(struct device *dev, struct device_attribute
1345 *devattr, char *buf)
1346 {
1347 struct it87_data *data = dev_get_drvdata(dev);
1348 return sprintf(buf, "%s\n", data->name);
1349 }
1350 static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
1351
1352 static struct attribute *it87_attributes[] = {
1353 &sensor_dev_attr_in0_input.dev_attr.attr,
1354 &sensor_dev_attr_in1_input.dev_attr.attr,
1355 &sensor_dev_attr_in2_input.dev_attr.attr,
1356 &sensor_dev_attr_in3_input.dev_attr.attr,
1357 &sensor_dev_attr_in4_input.dev_attr.attr,
1358 &sensor_dev_attr_in5_input.dev_attr.attr,
1359 &sensor_dev_attr_in6_input.dev_attr.attr,
1360 &sensor_dev_attr_in7_input.dev_attr.attr,
1361 &sensor_dev_attr_in8_input.dev_attr.attr,
1362 &sensor_dev_attr_in0_min.dev_attr.attr,
1363 &sensor_dev_attr_in1_min.dev_attr.attr,
1364 &sensor_dev_attr_in2_min.dev_attr.attr,
1365 &sensor_dev_attr_in3_min.dev_attr.attr,
1366 &sensor_dev_attr_in4_min.dev_attr.attr,
1367 &sensor_dev_attr_in5_min.dev_attr.attr,
1368 &sensor_dev_attr_in6_min.dev_attr.attr,
1369 &sensor_dev_attr_in7_min.dev_attr.attr,
1370 &sensor_dev_attr_in0_max.dev_attr.attr,
1371 &sensor_dev_attr_in1_max.dev_attr.attr,
1372 &sensor_dev_attr_in2_max.dev_attr.attr,
1373 &sensor_dev_attr_in3_max.dev_attr.attr,
1374 &sensor_dev_attr_in4_max.dev_attr.attr,
1375 &sensor_dev_attr_in5_max.dev_attr.attr,
1376 &sensor_dev_attr_in6_max.dev_attr.attr,
1377 &sensor_dev_attr_in7_max.dev_attr.attr,
1378 &sensor_dev_attr_in0_alarm.dev_attr.attr,
1379 &sensor_dev_attr_in1_alarm.dev_attr.attr,
1380 &sensor_dev_attr_in2_alarm.dev_attr.attr,
1381 &sensor_dev_attr_in3_alarm.dev_attr.attr,
1382 &sensor_dev_attr_in4_alarm.dev_attr.attr,
1383 &sensor_dev_attr_in5_alarm.dev_attr.attr,
1384 &sensor_dev_attr_in6_alarm.dev_attr.attr,
1385 &sensor_dev_attr_in7_alarm.dev_attr.attr,
1386
1387 &sensor_dev_attr_temp1_input.dev_attr.attr,
1388 &sensor_dev_attr_temp2_input.dev_attr.attr,
1389 &sensor_dev_attr_temp3_input.dev_attr.attr,
1390 &sensor_dev_attr_temp1_max.dev_attr.attr,
1391 &sensor_dev_attr_temp2_max.dev_attr.attr,
1392 &sensor_dev_attr_temp3_max.dev_attr.attr,
1393 &sensor_dev_attr_temp1_min.dev_attr.attr,
1394 &sensor_dev_attr_temp2_min.dev_attr.attr,
1395 &sensor_dev_attr_temp3_min.dev_attr.attr,
1396 &sensor_dev_attr_temp1_type.dev_attr.attr,
1397 &sensor_dev_attr_temp2_type.dev_attr.attr,
1398 &sensor_dev_attr_temp3_type.dev_attr.attr,
1399 &sensor_dev_attr_temp1_alarm.dev_attr.attr,
1400 &sensor_dev_attr_temp2_alarm.dev_attr.attr,
1401 &sensor_dev_attr_temp3_alarm.dev_attr.attr,
1402
1403 &dev_attr_alarms.attr,
1404 &sensor_dev_attr_intrusion0_alarm.dev_attr.attr,
1405 &dev_attr_name.attr,
1406 NULL
1407 };
1408
1409 static const struct attribute_group it87_group = {
1410 .attrs = it87_attributes,
1411 };
1412
1413 static struct attribute *it87_attributes_beep[] = {
1414 &sensor_dev_attr_in0_beep.dev_attr.attr,
1415 &sensor_dev_attr_in1_beep.dev_attr.attr,
1416 &sensor_dev_attr_in2_beep.dev_attr.attr,
1417 &sensor_dev_attr_in3_beep.dev_attr.attr,
1418 &sensor_dev_attr_in4_beep.dev_attr.attr,
1419 &sensor_dev_attr_in5_beep.dev_attr.attr,
1420 &sensor_dev_attr_in6_beep.dev_attr.attr,
1421 &sensor_dev_attr_in7_beep.dev_attr.attr,
1422
1423 &sensor_dev_attr_temp1_beep.dev_attr.attr,
1424 &sensor_dev_attr_temp2_beep.dev_attr.attr,
1425 &sensor_dev_attr_temp3_beep.dev_attr.attr,
1426 NULL
1427 };
1428
1429 static const struct attribute_group it87_group_beep = {
1430 .attrs = it87_attributes_beep,
1431 };
1432
1433 static struct attribute *it87_attributes_fan16[5][3+1] = { {
1434 &sensor_dev_attr_fan1_input16.dev_attr.attr,
1435 &sensor_dev_attr_fan1_min16.dev_attr.attr,
1436 &sensor_dev_attr_fan1_alarm.dev_attr.attr,
1437 NULL
1438 }, {
1439 &sensor_dev_attr_fan2_input16.dev_attr.attr,
1440 &sensor_dev_attr_fan2_min16.dev_attr.attr,
1441 &sensor_dev_attr_fan2_alarm.dev_attr.attr,
1442 NULL
1443 }, {
1444 &sensor_dev_attr_fan3_input16.dev_attr.attr,
1445 &sensor_dev_attr_fan3_min16.dev_attr.attr,
1446 &sensor_dev_attr_fan3_alarm.dev_attr.attr,
1447 NULL
1448 }, {
1449 &sensor_dev_attr_fan4_input16.dev_attr.attr,
1450 &sensor_dev_attr_fan4_min16.dev_attr.attr,
1451 &sensor_dev_attr_fan4_alarm.dev_attr.attr,
1452 NULL
1453 }, {
1454 &sensor_dev_attr_fan5_input16.dev_attr.attr,
1455 &sensor_dev_attr_fan5_min16.dev_attr.attr,
1456 &sensor_dev_attr_fan5_alarm.dev_attr.attr,
1457 NULL
1458 } };
1459
1460 static const struct attribute_group it87_group_fan16[5] = {
1461 { .attrs = it87_attributes_fan16[0] },
1462 { .attrs = it87_attributes_fan16[1] },
1463 { .attrs = it87_attributes_fan16[2] },
1464 { .attrs = it87_attributes_fan16[3] },
1465 { .attrs = it87_attributes_fan16[4] },
1466 };
1467
1468 static struct attribute *it87_attributes_fan[3][4+1] = { {
1469 &sensor_dev_attr_fan1_input.dev_attr.attr,
1470 &sensor_dev_attr_fan1_min.dev_attr.attr,
1471 &sensor_dev_attr_fan1_div.dev_attr.attr,
1472 &sensor_dev_attr_fan1_alarm.dev_attr.attr,
1473 NULL
1474 }, {
1475 &sensor_dev_attr_fan2_input.dev_attr.attr,
1476 &sensor_dev_attr_fan2_min.dev_attr.attr,
1477 &sensor_dev_attr_fan2_div.dev_attr.attr,
1478 &sensor_dev_attr_fan2_alarm.dev_attr.attr,
1479 NULL
1480 }, {
1481 &sensor_dev_attr_fan3_input.dev_attr.attr,
1482 &sensor_dev_attr_fan3_min.dev_attr.attr,
1483 &sensor_dev_attr_fan3_div.dev_attr.attr,
1484 &sensor_dev_attr_fan3_alarm.dev_attr.attr,
1485 NULL
1486 } };
1487
1488 static const struct attribute_group it87_group_fan[3] = {
1489 { .attrs = it87_attributes_fan[0] },
1490 { .attrs = it87_attributes_fan[1] },
1491 { .attrs = it87_attributes_fan[2] },
1492 };
1493
1494 static const struct attribute_group *
1495 it87_get_fan_group(const struct it87_data *data)
1496 {
1497 return has_16bit_fans(data) ? it87_group_fan16 : it87_group_fan;
1498 }
1499
1500 static struct attribute *it87_attributes_pwm[3][4+1] = { {
1501 &sensor_dev_attr_pwm1_enable.dev_attr.attr,
1502 &sensor_dev_attr_pwm1.dev_attr.attr,
1503 &dev_attr_pwm1_freq.attr,
1504 &sensor_dev_attr_pwm1_auto_channels_temp.dev_attr.attr,
1505 NULL
1506 }, {
1507 &sensor_dev_attr_pwm2_enable.dev_attr.attr,
1508 &sensor_dev_attr_pwm2.dev_attr.attr,
1509 &dev_attr_pwm2_freq.attr,
1510 &sensor_dev_attr_pwm2_auto_channels_temp.dev_attr.attr,
1511 NULL
1512 }, {
1513 &sensor_dev_attr_pwm3_enable.dev_attr.attr,
1514 &sensor_dev_attr_pwm3.dev_attr.attr,
1515 &dev_attr_pwm3_freq.attr,
1516 &sensor_dev_attr_pwm3_auto_channels_temp.dev_attr.attr,
1517 NULL
1518 } };
1519
1520 static const struct attribute_group it87_group_pwm[3] = {
1521 { .attrs = it87_attributes_pwm[0] },
1522 { .attrs = it87_attributes_pwm[1] },
1523 { .attrs = it87_attributes_pwm[2] },
1524 };
1525
1526 static struct attribute *it87_attributes_autopwm[3][9+1] = { {
1527 &sensor_dev_attr_pwm1_auto_point1_pwm.dev_attr.attr,
1528 &sensor_dev_attr_pwm1_auto_point2_pwm.dev_attr.attr,
1529 &sensor_dev_attr_pwm1_auto_point3_pwm.dev_attr.attr,
1530 &sensor_dev_attr_pwm1_auto_point4_pwm.dev_attr.attr,
1531 &sensor_dev_attr_pwm1_auto_point1_temp.dev_attr.attr,
1532 &sensor_dev_attr_pwm1_auto_point1_temp_hyst.dev_attr.attr,
1533 &sensor_dev_attr_pwm1_auto_point2_temp.dev_attr.attr,
1534 &sensor_dev_attr_pwm1_auto_point3_temp.dev_attr.attr,
1535 &sensor_dev_attr_pwm1_auto_point4_temp.dev_attr.attr,
1536 NULL
1537 }, {
1538 &sensor_dev_attr_pwm2_auto_point1_pwm.dev_attr.attr,
1539 &sensor_dev_attr_pwm2_auto_point2_pwm.dev_attr.attr,
1540 &sensor_dev_attr_pwm2_auto_point3_pwm.dev_attr.attr,
1541 &sensor_dev_attr_pwm2_auto_point4_pwm.dev_attr.attr,
1542 &sensor_dev_attr_pwm2_auto_point1_temp.dev_attr.attr,
1543 &sensor_dev_attr_pwm2_auto_point1_temp_hyst.dev_attr.attr,
1544 &sensor_dev_attr_pwm2_auto_point2_temp.dev_attr.attr,
1545 &sensor_dev_attr_pwm2_auto_point3_temp.dev_attr.attr,
1546 &sensor_dev_attr_pwm2_auto_point4_temp.dev_attr.attr,
1547 NULL
1548 }, {
1549 &sensor_dev_attr_pwm3_auto_point1_pwm.dev_attr.attr,
1550 &sensor_dev_attr_pwm3_auto_point2_pwm.dev_attr.attr,
1551 &sensor_dev_attr_pwm3_auto_point3_pwm.dev_attr.attr,
1552 &sensor_dev_attr_pwm3_auto_point4_pwm.dev_attr.attr,
1553 &sensor_dev_attr_pwm3_auto_point1_temp.dev_attr.attr,
1554 &sensor_dev_attr_pwm3_auto_point1_temp_hyst.dev_attr.attr,
1555 &sensor_dev_attr_pwm3_auto_point2_temp.dev_attr.attr,
1556 &sensor_dev_attr_pwm3_auto_point3_temp.dev_attr.attr,
1557 &sensor_dev_attr_pwm3_auto_point4_temp.dev_attr.attr,
1558 NULL
1559 } };
1560
1561 static const struct attribute_group it87_group_autopwm[3] = {
1562 { .attrs = it87_attributes_autopwm[0] },
1563 { .attrs = it87_attributes_autopwm[1] },
1564 { .attrs = it87_attributes_autopwm[2] },
1565 };
1566
1567 static struct attribute *it87_attributes_fan_beep[] = {
1568 &sensor_dev_attr_fan1_beep.dev_attr.attr,
1569 &sensor_dev_attr_fan2_beep.dev_attr.attr,
1570 &sensor_dev_attr_fan3_beep.dev_attr.attr,
1571 &sensor_dev_attr_fan4_beep.dev_attr.attr,
1572 &sensor_dev_attr_fan5_beep.dev_attr.attr,
1573 };
1574
1575 static struct attribute *it87_attributes_vid[] = {
1576 &dev_attr_vrm.attr,
1577 &dev_attr_cpu0_vid.attr,
1578 NULL
1579 };
1580
1581 static const struct attribute_group it87_group_vid = {
1582 .attrs = it87_attributes_vid,
1583 };
1584
1585 static struct attribute *it87_attributes_label[] = {
1586 &sensor_dev_attr_in3_label.dev_attr.attr,
1587 &sensor_dev_attr_in7_label.dev_attr.attr,
1588 &sensor_dev_attr_in8_label.dev_attr.attr,
1589 NULL
1590 };
1591
1592 static const struct attribute_group it87_group_label = {
1593 .attrs = it87_attributes_label,
1594 };
1595
1596 /* SuperIO detection - will change isa_address if a chip is found */
1597 static int __init it87_find(unsigned short *address,
1598 struct it87_sio_data *sio_data)
1599 {
1600 int err;
1601 u16 chip_type;
1602 const char *board_vendor, *board_name;
1603
1604 err = superio_enter();
1605 if (err)
1606 return err;
1607
1608 err = -ENODEV;
1609 chip_type = force_id ? force_id : superio_inw(DEVID);
1610
1611 switch (chip_type) {
1612 case IT8705F_DEVID:
1613 sio_data->type = it87;
1614 break;
1615 case IT8712F_DEVID:
1616 sio_data->type = it8712;
1617 break;
1618 case IT8716F_DEVID:
1619 case IT8726F_DEVID:
1620 sio_data->type = it8716;
1621 break;
1622 case IT8718F_DEVID:
1623 sio_data->type = it8718;
1624 break;
1625 case IT8720F_DEVID:
1626 sio_data->type = it8720;
1627 break;
1628 case IT8721F_DEVID:
1629 sio_data->type = it8721;
1630 break;
1631 case IT8728F_DEVID:
1632 sio_data->type = it8728;
1633 break;
1634 case 0xffff: /* No device at all */
1635 goto exit;
1636 default:
1637 pr_debug("Unsupported chip (DEVID=0x%x)\n", chip_type);
1638 goto exit;
1639 }
1640
1641 superio_select(PME);
1642 if (!(superio_inb(IT87_ACT_REG) & 0x01)) {
1643 pr_info("Device not activated, skipping\n");
1644 goto exit;
1645 }
1646
1647 *address = superio_inw(IT87_BASE_REG) & ~(IT87_EXTENT - 1);
1648 if (*address == 0) {
1649 pr_info("Base address not set, skipping\n");
1650 goto exit;
1651 }
1652
1653 err = 0;
1654 sio_data->revision = superio_inb(DEVREV) & 0x0f;
1655 pr_info("Found IT%04xF chip at 0x%x, revision %d\n",
1656 chip_type, *address, sio_data->revision);
1657
1658 /* in8 (Vbat) is always internal */
1659 sio_data->internal = (1 << 2);
1660
1661 /* Read GPIO config and VID value from LDN 7 (GPIO) */
1662 if (sio_data->type == it87) {
1663 /* The IT8705F doesn't have VID pins at all */
1664 sio_data->skip_vid = 1;
1665
1666 /* The IT8705F has a different LD number for GPIO */
1667 superio_select(5);
1668 sio_data->beep_pin = superio_inb(IT87_SIO_BEEP_PIN_REG) & 0x3f;
1669 } else {
1670 int reg;
1671
1672 superio_select(GPIO);
1673
1674 reg = superio_inb(IT87_SIO_GPIO3_REG);
1675 if (sio_data->type == it8721 || sio_data->type == it8728) {
1676 /*
1677 * The IT8721F/IT8758E doesn't have VID pins at all,
1678 * not sure about the IT8728F.
1679 */
1680 sio_data->skip_vid = 1;
1681 } else {
1682 /* We need at least 4 VID pins */
1683 if (reg & 0x0f) {
1684 pr_info("VID is disabled (pins used for GPIO)\n");
1685 sio_data->skip_vid = 1;
1686 }
1687 }
1688
1689 /* Check if fan3 is there or not */
1690 if (reg & (1 << 6))
1691 sio_data->skip_pwm |= (1 << 2);
1692 if (reg & (1 << 7))
1693 sio_data->skip_fan |= (1 << 2);
1694
1695 /* Check if fan2 is there or not */
1696 reg = superio_inb(IT87_SIO_GPIO5_REG);
1697 if (reg & (1 << 1))
1698 sio_data->skip_pwm |= (1 << 1);
1699 if (reg & (1 << 2))
1700 sio_data->skip_fan |= (1 << 1);
1701
1702 if ((sio_data->type == it8718 || sio_data->type == it8720)
1703 && !(sio_data->skip_vid))
1704 sio_data->vid_value = superio_inb(IT87_SIO_VID_REG);
1705
1706 reg = superio_inb(IT87_SIO_PINX2_REG);
1707 /*
1708 * The IT8720F has no VIN7 pin, so VCCH should always be
1709 * routed internally to VIN7 with an internal divider.
1710 * Curiously, there still is a configuration bit to control
1711 * this, which means it can be set incorrectly. And even
1712 * more curiously, many boards out there are improperly
1713 * configured, even though the IT8720F datasheet claims
1714 * that the internal routing of VCCH to VIN7 is the default
1715 * setting. So we force the internal routing in this case.
1716 */
1717 if (sio_data->type == it8720 && !(reg & (1 << 1))) {
1718 reg |= (1 << 1);
1719 superio_outb(IT87_SIO_PINX2_REG, reg);
1720 pr_notice("Routing internal VCCH to in7\n");
1721 }
1722 if (reg & (1 << 0))
1723 sio_data->internal |= (1 << 0);
1724 if ((reg & (1 << 1)) || sio_data->type == it8721 ||
1725 sio_data->type == it8728)
1726 sio_data->internal |= (1 << 1);
1727
1728 sio_data->beep_pin = superio_inb(IT87_SIO_BEEP_PIN_REG) & 0x3f;
1729 }
1730 if (sio_data->beep_pin)
1731 pr_info("Beeping is supported\n");
1732
1733 /* Disable specific features based on DMI strings */
1734 board_vendor = dmi_get_system_info(DMI_BOARD_VENDOR);
1735 board_name = dmi_get_system_info(DMI_BOARD_NAME);
1736 if (board_vendor && board_name) {
1737 if (strcmp(board_vendor, "nVIDIA") == 0
1738 && strcmp(board_name, "FN68PT") == 0) {
1739 /* On the Shuttle SN68PT, FAN_CTL2 is apparently not
1740 connected to a fan, but to something else. One user
1741 has reported instant system power-off when changing
1742 the PWM2 duty cycle, so we disable it.
1743 I use the board name string as the trigger in case
1744 the same board is ever used in other systems. */
1745 pr_info("Disabling pwm2 due to hardware constraints\n");
1746 sio_data->skip_pwm = (1 << 1);
1747 }
1748 }
1749
1750 exit:
1751 superio_exit();
1752 return err;
1753 }
1754
1755 static void it87_remove_files(struct device *dev)
1756 {
1757 struct it87_data *data = platform_get_drvdata(pdev);
1758 struct it87_sio_data *sio_data = dev->platform_data;
1759 const struct attribute_group *fan_group = it87_get_fan_group(data);
1760 int i;
1761
1762 sysfs_remove_group(&dev->kobj, &it87_group);
1763 if (sio_data->beep_pin)
1764 sysfs_remove_group(&dev->kobj, &it87_group_beep);
1765 for (i = 0; i < 5; i++) {
1766 if (!(data->has_fan & (1 << i)))
1767 continue;
1768 sysfs_remove_group(&dev->kobj, &fan_group[i]);
1769 if (sio_data->beep_pin)
1770 sysfs_remove_file(&dev->kobj,
1771 it87_attributes_fan_beep[i]);
1772 }
1773 for (i = 0; i < 3; i++) {
1774 if (sio_data->skip_pwm & (1 << 0))
1775 continue;
1776 sysfs_remove_group(&dev->kobj, &it87_group_pwm[i]);
1777 if (has_old_autopwm(data))
1778 sysfs_remove_group(&dev->kobj,
1779 &it87_group_autopwm[i]);
1780 }
1781 if (!sio_data->skip_vid)
1782 sysfs_remove_group(&dev->kobj, &it87_group_vid);
1783 sysfs_remove_group(&dev->kobj, &it87_group_label);
1784 }
1785
1786 static int __devinit it87_probe(struct platform_device *pdev)
1787 {
1788 struct it87_data *data;
1789 struct resource *res;
1790 struct device *dev = &pdev->dev;
1791 struct it87_sio_data *sio_data = dev->platform_data;
1792 const struct attribute_group *fan_group;
1793 int err = 0, i;
1794 int enable_pwm_interface;
1795 int fan_beep_need_rw;
1796 static const char *names[] = {
1797 "it87",
1798 "it8712",
1799 "it8716",
1800 "it8718",
1801 "it8720",
1802 "it8721",
1803 "it8728",
1804 };
1805
1806 res = platform_get_resource(pdev, IORESOURCE_IO, 0);
1807 if (!request_region(res->start, IT87_EC_EXTENT, DRVNAME)) {
1808 dev_err(dev, "Failed to request region 0x%lx-0x%lx\n",
1809 (unsigned long)res->start,
1810 (unsigned long)(res->start + IT87_EC_EXTENT - 1));
1811 err = -EBUSY;
1812 goto ERROR0;
1813 }
1814
1815 data = kzalloc(sizeof(struct it87_data), GFP_KERNEL);
1816 if (!data) {
1817 err = -ENOMEM;
1818 goto ERROR1;
1819 }
1820
1821 data->addr = res->start;
1822 data->type = sio_data->type;
1823 data->revision = sio_data->revision;
1824 data->name = names[sio_data->type];
1825
1826 /* Now, we do the remaining detection. */
1827 if ((it87_read_value(data, IT87_REG_CONFIG) & 0x80)
1828 || it87_read_value(data, IT87_REG_CHIPID) != 0x90) {
1829 err = -ENODEV;
1830 goto ERROR2;
1831 }
1832
1833 platform_set_drvdata(pdev, data);
1834
1835 mutex_init(&data->update_lock);
1836
1837 /* Check PWM configuration */
1838 enable_pwm_interface = it87_check_pwm(dev);
1839
1840 /* Starting with IT8721F, we handle scaling of internal voltages */
1841 if (has_12mv_adc(data)) {
1842 if (sio_data->internal & (1 << 0))
1843 data->in_scaled |= (1 << 3); /* in3 is AVCC */
1844 if (sio_data->internal & (1 << 1))
1845 data->in_scaled |= (1 << 7); /* in7 is VSB */
1846 if (sio_data->internal & (1 << 2))
1847 data->in_scaled |= (1 << 8); /* in8 is Vbat */
1848 }
1849
1850 /* Initialize the IT87 chip */
1851 it87_init_device(pdev);
1852
1853 /* Register sysfs hooks */
1854 err = sysfs_create_group(&dev->kobj, &it87_group);
1855 if (err)
1856 goto ERROR2;
1857
1858 if (sio_data->beep_pin) {
1859 err = sysfs_create_group(&dev->kobj, &it87_group_beep);
1860 if (err)
1861 goto ERROR4;
1862 }
1863
1864 /* Do not create fan files for disabled fans */
1865 fan_group = it87_get_fan_group(data);
1866 fan_beep_need_rw = 1;
1867 for (i = 0; i < 5; i++) {
1868 if (!(data->has_fan & (1 << i)))
1869 continue;
1870 err = sysfs_create_group(&dev->kobj, &fan_group[i]);
1871 if (err)
1872 goto ERROR4;
1873
1874 if (sio_data->beep_pin) {
1875 err = sysfs_create_file(&dev->kobj,
1876 it87_attributes_fan_beep[i]);
1877 if (err)
1878 goto ERROR4;
1879 if (!fan_beep_need_rw)
1880 continue;
1881
1882 /* As we have a single beep enable bit for all fans,
1883 * only the first enabled fan has a writable attribute
1884 * for it. */
1885 if (sysfs_chmod_file(&dev->kobj,
1886 it87_attributes_fan_beep[i],
1887 S_IRUGO | S_IWUSR))
1888 dev_dbg(dev, "chmod +w fan%d_beep failed\n",
1889 i + 1);
1890 fan_beep_need_rw = 0;
1891 }
1892 }
1893
1894 if (enable_pwm_interface) {
1895 for (i = 0; i < 3; i++) {
1896 if (sio_data->skip_pwm & (1 << i))
1897 continue;
1898 err = sysfs_create_group(&dev->kobj,
1899 &it87_group_pwm[i]);
1900 if (err)
1901 goto ERROR4;
1902
1903 if (!has_old_autopwm(data))
1904 continue;
1905 err = sysfs_create_group(&dev->kobj,
1906 &it87_group_autopwm[i]);
1907 if (err)
1908 goto ERROR4;
1909 }
1910 }
1911
1912 if (!sio_data->skip_vid) {
1913 data->vrm = vid_which_vrm();
1914 /* VID reading from Super-I/O config space if available */
1915 data->vid = sio_data->vid_value;
1916 err = sysfs_create_group(&dev->kobj, &it87_group_vid);
1917 if (err)
1918 goto ERROR4;
1919 }
1920
1921 /* Export labels for internal sensors */
1922 for (i = 0; i < 3; i++) {
1923 if (!(sio_data->internal & (1 << i)))
1924 continue;
1925 err = sysfs_create_file(&dev->kobj,
1926 it87_attributes_label[i]);
1927 if (err)
1928 goto ERROR4;
1929 }
1930
1931 data->hwmon_dev = hwmon_device_register(dev);
1932 if (IS_ERR(data->hwmon_dev)) {
1933 err = PTR_ERR(data->hwmon_dev);
1934 goto ERROR4;
1935 }
1936
1937 return 0;
1938
1939 ERROR4:
1940 it87_remove_files(dev);
1941 ERROR2:
1942 platform_set_drvdata(pdev, NULL);
1943 kfree(data);
1944 ERROR1:
1945 release_region(res->start, IT87_EC_EXTENT);
1946 ERROR0:
1947 return err;
1948 }
1949
1950 static int __devexit it87_remove(struct platform_device *pdev)
1951 {
1952 struct it87_data *data = platform_get_drvdata(pdev);
1953
1954 hwmon_device_unregister(data->hwmon_dev);
1955 it87_remove_files(&pdev->dev);
1956
1957 release_region(data->addr, IT87_EC_EXTENT);
1958 platform_set_drvdata(pdev, NULL);
1959 kfree(data);
1960
1961 return 0;
1962 }
1963
1964 /* Must be called with data->update_lock held, except during initialization.
1965 We ignore the IT87 BUSY flag at this moment - it could lead to deadlocks,
1966 would slow down the IT87 access and should not be necessary. */
1967 static int it87_read_value(struct it87_data *data, u8 reg)
1968 {
1969 outb_p(reg, data->addr + IT87_ADDR_REG_OFFSET);
1970 return inb_p(data->addr + IT87_DATA_REG_OFFSET);
1971 }
1972
1973 /* Must be called with data->update_lock held, except during initialization.
1974 We ignore the IT87 BUSY flag at this moment - it could lead to deadlocks,
1975 would slow down the IT87 access and should not be necessary. */
1976 static void it87_write_value(struct it87_data *data, u8 reg, u8 value)
1977 {
1978 outb_p(reg, data->addr + IT87_ADDR_REG_OFFSET);
1979 outb_p(value, data->addr + IT87_DATA_REG_OFFSET);
1980 }
1981
1982 /* Return 1 if and only if the PWM interface is safe to use */
1983 static int __devinit it87_check_pwm(struct device *dev)
1984 {
1985 struct it87_data *data = dev_get_drvdata(dev);
1986 /* Some BIOSes fail to correctly configure the IT87 fans. All fans off
1987 * and polarity set to active low is sign that this is the case so we
1988 * disable pwm control to protect the user. */
1989 int tmp = it87_read_value(data, IT87_REG_FAN_CTL);
1990 if ((tmp & 0x87) == 0) {
1991 if (fix_pwm_polarity) {
1992 /* The user asks us to attempt a chip reconfiguration.
1993 * This means switching to active high polarity and
1994 * inverting all fan speed values. */
1995 int i;
1996 u8 pwm[3];
1997
1998 for (i = 0; i < 3; i++)
1999 pwm[i] = it87_read_value(data,
2000 IT87_REG_PWM(i));
2001
2002 /* If any fan is in automatic pwm mode, the polarity
2003 * might be correct, as suspicious as it seems, so we
2004 * better don't change anything (but still disable the
2005 * PWM interface). */
2006 if (!((pwm[0] | pwm[1] | pwm[2]) & 0x80)) {
2007 dev_info(dev, "Reconfiguring PWM to "
2008 "active high polarity\n");
2009 it87_write_value(data, IT87_REG_FAN_CTL,
2010 tmp | 0x87);
2011 for (i = 0; i < 3; i++)
2012 it87_write_value(data,
2013 IT87_REG_PWM(i),
2014 0x7f & ~pwm[i]);
2015 return 1;
2016 }
2017
2018 dev_info(dev, "PWM configuration is "
2019 "too broken to be fixed\n");
2020 }
2021
2022 dev_info(dev, "Detected broken BIOS "
2023 "defaults, disabling PWM interface\n");
2024 return 0;
2025 } else if (fix_pwm_polarity) {
2026 dev_info(dev, "PWM configuration looks "
2027 "sane, won't touch\n");
2028 }
2029
2030 return 1;
2031 }
2032
2033 /* Called when we have found a new IT87. */
2034 static void __devinit it87_init_device(struct platform_device *pdev)
2035 {
2036 struct it87_sio_data *sio_data = pdev->dev.platform_data;
2037 struct it87_data *data = platform_get_drvdata(pdev);
2038 int tmp, i;
2039 u8 mask;
2040
2041 /* For each PWM channel:
2042 * - If it is in automatic mode, setting to manual mode should set
2043 * the fan to full speed by default.
2044 * - If it is in manual mode, we need a mapping to temperature
2045 * channels to use when later setting to automatic mode later.
2046 * Use a 1:1 mapping by default (we are clueless.)
2047 * In both cases, the value can (and should) be changed by the user
2048 * prior to switching to a different mode.
2049 * Note that this is no longer needed for the IT8721F and later, as
2050 * these have separate registers for the temperature mapping and the
2051 * manual duty cycle. */
2052 for (i = 0; i < 3; i++) {
2053 data->pwm_temp_map[i] = i;
2054 data->pwm_duty[i] = 0x7f; /* Full speed */
2055 data->auto_pwm[i][3] = 0x7f; /* Full speed, hard-coded */
2056 }
2057
2058 /* Some chips seem to have default value 0xff for all limit
2059 * registers. For low voltage limits it makes no sense and triggers
2060 * alarms, so change to 0 instead. For high temperature limits, it
2061 * means -1 degree C, which surprisingly doesn't trigger an alarm,
2062 * but is still confusing, so change to 127 degrees C. */
2063 for (i = 0; i < 8; i++) {
2064 tmp = it87_read_value(data, IT87_REG_VIN_MIN(i));
2065 if (tmp == 0xff)
2066 it87_write_value(data, IT87_REG_VIN_MIN(i), 0);
2067 }
2068 for (i = 0; i < 3; i++) {
2069 tmp = it87_read_value(data, IT87_REG_TEMP_HIGH(i));
2070 if (tmp == 0xff)
2071 it87_write_value(data, IT87_REG_TEMP_HIGH(i), 127);
2072 }
2073
2074 /* Temperature channels are not forcibly enabled, as they can be
2075 * set to two different sensor types and we can't guess which one
2076 * is correct for a given system. These channels can be enabled at
2077 * run-time through the temp{1-3}_type sysfs accessors if needed. */
2078
2079 /* Check if voltage monitors are reset manually or by some reason */
2080 tmp = it87_read_value(data, IT87_REG_VIN_ENABLE);
2081 if ((tmp & 0xff) == 0) {
2082 /* Enable all voltage monitors */
2083 it87_write_value(data, IT87_REG_VIN_ENABLE, 0xff);
2084 }
2085
2086 /* Check if tachometers are reset manually or by some reason */
2087 mask = 0x70 & ~(sio_data->skip_fan << 4);
2088 data->fan_main_ctrl = it87_read_value(data, IT87_REG_FAN_MAIN_CTRL);
2089 if ((data->fan_main_ctrl & mask) == 0) {
2090 /* Enable all fan tachometers */
2091 data->fan_main_ctrl |= mask;
2092 it87_write_value(data, IT87_REG_FAN_MAIN_CTRL,
2093 data->fan_main_ctrl);
2094 }
2095 data->has_fan = (data->fan_main_ctrl >> 4) & 0x07;
2096
2097 /* Set tachometers to 16-bit mode if needed */
2098 if (has_16bit_fans(data)) {
2099 tmp = it87_read_value(data, IT87_REG_FAN_16BIT);
2100 if (~tmp & 0x07 & data->has_fan) {
2101 dev_dbg(&pdev->dev,
2102 "Setting fan1-3 to 16-bit mode\n");
2103 it87_write_value(data, IT87_REG_FAN_16BIT,
2104 tmp | 0x07);
2105 }
2106 /* IT8705F only supports three fans. */
2107 if (data->type != it87) {
2108 if (tmp & (1 << 4))
2109 data->has_fan |= (1 << 3); /* fan4 enabled */
2110 if (tmp & (1 << 5))
2111 data->has_fan |= (1 << 4); /* fan5 enabled */
2112 }
2113 }
2114
2115 /* Fan input pins may be used for alternative functions */
2116 data->has_fan &= ~sio_data->skip_fan;
2117
2118 /* Start monitoring */
2119 it87_write_value(data, IT87_REG_CONFIG,
2120 (it87_read_value(data, IT87_REG_CONFIG) & 0x36)
2121 | (update_vbat ? 0x41 : 0x01));
2122 }
2123
2124 static void it87_update_pwm_ctrl(struct it87_data *data, int nr)
2125 {
2126 data->pwm_ctrl[nr] = it87_read_value(data, IT87_REG_PWM(nr));
2127 if (has_newer_autopwm(data)) {
2128 data->pwm_temp_map[nr] = data->pwm_ctrl[nr] & 0x03;
2129 data->pwm_duty[nr] = it87_read_value(data,
2130 IT87_REG_PWM_DUTY(nr));
2131 } else {
2132 if (data->pwm_ctrl[nr] & 0x80) /* Automatic mode */
2133 data->pwm_temp_map[nr] = data->pwm_ctrl[nr] & 0x03;
2134 else /* Manual mode */
2135 data->pwm_duty[nr] = data->pwm_ctrl[nr] & 0x7f;
2136 }
2137
2138 if (has_old_autopwm(data)) {
2139 int i;
2140
2141 for (i = 0; i < 5 ; i++)
2142 data->auto_temp[nr][i] = it87_read_value(data,
2143 IT87_REG_AUTO_TEMP(nr, i));
2144 for (i = 0; i < 3 ; i++)
2145 data->auto_pwm[nr][i] = it87_read_value(data,
2146 IT87_REG_AUTO_PWM(nr, i));
2147 }
2148 }
2149
2150 static struct it87_data *it87_update_device(struct device *dev)
2151 {
2152 struct it87_data *data = dev_get_drvdata(dev);
2153 int i;
2154
2155 mutex_lock(&data->update_lock);
2156
2157 if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
2158 || !data->valid) {
2159 if (update_vbat) {
2160 /* Cleared after each update, so reenable. Value
2161 returned by this read will be previous value */
2162 it87_write_value(data, IT87_REG_CONFIG,
2163 it87_read_value(data, IT87_REG_CONFIG) | 0x40);
2164 }
2165 for (i = 0; i <= 7; i++) {
2166 data->in[i] =
2167 it87_read_value(data, IT87_REG_VIN(i));
2168 data->in_min[i] =
2169 it87_read_value(data, IT87_REG_VIN_MIN(i));
2170 data->in_max[i] =
2171 it87_read_value(data, IT87_REG_VIN_MAX(i));
2172 }
2173 /* in8 (battery) has no limit registers */
2174 data->in[8] = it87_read_value(data, IT87_REG_VIN(8));
2175
2176 for (i = 0; i < 5; i++) {
2177 /* Skip disabled fans */
2178 if (!(data->has_fan & (1 << i)))
2179 continue;
2180
2181 data->fan_min[i] =
2182 it87_read_value(data, IT87_REG_FAN_MIN[i]);
2183 data->fan[i] = it87_read_value(data,
2184 IT87_REG_FAN[i]);
2185 /* Add high byte if in 16-bit mode */
2186 if (has_16bit_fans(data)) {
2187 data->fan[i] |= it87_read_value(data,
2188 IT87_REG_FANX[i]) << 8;
2189 data->fan_min[i] |= it87_read_value(data,
2190 IT87_REG_FANX_MIN[i]) << 8;
2191 }
2192 }
2193 for (i = 0; i < 3; i++) {
2194 data->temp[i] =
2195 it87_read_value(data, IT87_REG_TEMP(i));
2196 data->temp_high[i] =
2197 it87_read_value(data, IT87_REG_TEMP_HIGH(i));
2198 data->temp_low[i] =
2199 it87_read_value(data, IT87_REG_TEMP_LOW(i));
2200 }
2201
2202 /* Newer chips don't have clock dividers */
2203 if ((data->has_fan & 0x07) && !has_16bit_fans(data)) {
2204 i = it87_read_value(data, IT87_REG_FAN_DIV);
2205 data->fan_div[0] = i & 0x07;
2206 data->fan_div[1] = (i >> 3) & 0x07;
2207 data->fan_div[2] = (i & 0x40) ? 3 : 1;
2208 }
2209
2210 data->alarms =
2211 it87_read_value(data, IT87_REG_ALARM1) |
2212 (it87_read_value(data, IT87_REG_ALARM2) << 8) |
2213 (it87_read_value(data, IT87_REG_ALARM3) << 16);
2214 data->beeps = it87_read_value(data, IT87_REG_BEEP_ENABLE);
2215
2216 data->fan_main_ctrl = it87_read_value(data,
2217 IT87_REG_FAN_MAIN_CTRL);
2218 data->fan_ctl = it87_read_value(data, IT87_REG_FAN_CTL);
2219 for (i = 0; i < 3; i++)
2220 it87_update_pwm_ctrl(data, i);
2221
2222 data->sensor = it87_read_value(data, IT87_REG_TEMP_ENABLE);
2223 /* The 8705 does not have VID capability.
2224 The 8718 and later don't use IT87_REG_VID for the
2225 same purpose. */
2226 if (data->type == it8712 || data->type == it8716) {
2227 data->vid = it87_read_value(data, IT87_REG_VID);
2228 /* The older IT8712F revisions had only 5 VID pins,
2229 but we assume it is always safe to read 6 bits. */
2230 data->vid &= 0x3f;
2231 }
2232 data->last_updated = jiffies;
2233 data->valid = 1;
2234 }
2235
2236 mutex_unlock(&data->update_lock);
2237
2238 return data;
2239 }
2240
2241 static int __init it87_device_add(unsigned short address,
2242 const struct it87_sio_data *sio_data)
2243 {
2244 struct resource res = {
2245 .start = address + IT87_EC_OFFSET,
2246 .end = address + IT87_EC_OFFSET + IT87_EC_EXTENT - 1,
2247 .name = DRVNAME,
2248 .flags = IORESOURCE_IO,
2249 };
2250 int err;
2251
2252 err = acpi_check_resource_conflict(&res);
2253 if (err)
2254 goto exit;
2255
2256 pdev = platform_device_alloc(DRVNAME, address);
2257 if (!pdev) {
2258 err = -ENOMEM;
2259 pr_err("Device allocation failed\n");
2260 goto exit;
2261 }
2262
2263 err = platform_device_add_resources(pdev, &res, 1);
2264 if (err) {
2265 pr_err("Device resource addition failed (%d)\n", err);
2266 goto exit_device_put;
2267 }
2268
2269 err = platform_device_add_data(pdev, sio_data,
2270 sizeof(struct it87_sio_data));
2271 if (err) {
2272 pr_err("Platform data allocation failed\n");
2273 goto exit_device_put;
2274 }
2275
2276 err = platform_device_add(pdev);
2277 if (err) {
2278 pr_err("Device addition failed (%d)\n", err);
2279 goto exit_device_put;
2280 }
2281
2282 return 0;
2283
2284 exit_device_put:
2285 platform_device_put(pdev);
2286 exit:
2287 return err;
2288 }
2289
2290 static int __init sm_it87_init(void)
2291 {
2292 int err;
2293 unsigned short isa_address = 0;
2294 struct it87_sio_data sio_data;
2295
2296 memset(&sio_data, 0, sizeof(struct it87_sio_data));
2297 err = it87_find(&isa_address, &sio_data);
2298 if (err)
2299 return err;
2300 err = platform_driver_register(&it87_driver);
2301 if (err)
2302 return err;
2303
2304 err = it87_device_add(isa_address, &sio_data);
2305 if (err) {
2306 platform_driver_unregister(&it87_driver);
2307 return err;
2308 }
2309
2310 return 0;
2311 }
2312
2313 static void __exit sm_it87_exit(void)
2314 {
2315 platform_device_unregister(pdev);
2316 platform_driver_unregister(&it87_driver);
2317 }
2318
2319
2320 MODULE_AUTHOR("Chris Gauthron, "
2321 "Jean Delvare <khali@linux-fr.org>");
2322 MODULE_DESCRIPTION("IT8705F/IT871xF/IT872xF hardware monitoring driver");
2323 module_param(update_vbat, bool, 0);
2324 MODULE_PARM_DESC(update_vbat, "Update vbat if set else return powerup value");
2325 module_param(fix_pwm_polarity, bool, 0);
2326 MODULE_PARM_DESC(fix_pwm_polarity,
2327 "Force PWM polarity to active high (DANGEROUS)");
2328 MODULE_LICENSE("GPL");
2329
2330 module_init(sm_it87_init);
2331 module_exit(sm_it87_exit);