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Linux 2.6.34-rc3
[pohmelfs.git] / drivers / hwmon / it87.c
blob1002befd87d5c63268e8d2a4fb7f0513e52657d0
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 * IT8726F Super I/O chip w/LPC interface
19 * Sis950 A clone of the IT8705F
20 *
21 * Copyright (C) 2001 Chris Gauthron
22 * Copyright (C) 2005-2010 Jean Delvare <khali@linux-fr.org>
23 *
24 * This program is free software; you can redistribute it and/or modify
25 * it under the terms of the GNU General Public License as published by
26 * the Free Software Foundation; either version 2 of the License, or
27 * (at your option) any later version.
28 *
29 * This program is distributed in the hope that it will be useful,
30 * but WITHOUT ANY WARRANTY; without even the implied warranty of
31 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
32 * GNU General Public License for more details.
33 *
34 * You should have received a copy of the GNU General Public License
35 * along with this program; if not, write to the Free Software
36 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
37 */
38
39 #include <linux/module.h>
40 #include <linux/init.h>
41 #include <linux/slab.h>
42 #include <linux/jiffies.h>
43 #include <linux/platform_device.h>
44 #include <linux/hwmon.h>
45 #include <linux/hwmon-sysfs.h>
46 #include <linux/hwmon-vid.h>
47 #include <linux/err.h>
48 #include <linux/mutex.h>
49 #include <linux/sysfs.h>
50 #include <linux/string.h>
51 #include <linux/dmi.h>
52 #include <linux/acpi.h>
53 #include <linux/io.h>
54
55 #define DRVNAME "it87"
56
57 enum chips { it87, it8712, it8716, it8718, it8720 };
58
59 static unsigned short force_id;
60 module_param(force_id, ushort, 0);
61 MODULE_PARM_DESC(force_id, "Override the detected device ID");
62
63 static struct platform_device *pdev;
64
65 #define REG 0x2e /* The register to read/write */
66 #define DEV 0x07 /* Register: Logical device select */
67 #define VAL 0x2f /* The value to read/write */
68 #define PME 0x04 /* The device with the fan registers in it */
69
70 /* The device with the IT8718F/IT8720F VID value in it */
71 #define GPIO 0x07
72
73 #define DEVID 0x20 /* Register: Device ID */
74 #define DEVREV 0x22 /* Register: Device Revision */
75
76 static inline int
77 superio_inb(int reg)
78 {
79 outb(reg, REG);
80 return inb(VAL);
81 }
82
83 static int superio_inw(int reg)
84 {
85 int val;
86 outb(reg++, REG);
87 val = inb(VAL) << 8;
88 outb(reg, REG);
89 val |= inb(VAL);
90 return val;
91 }
92
93 static inline void
94 superio_select(int ldn)
95 {
96 outb(DEV, REG);
97 outb(ldn, VAL);
98 }
99
100 static inline void
101 superio_enter(void)
102 {
103 outb(0x87, REG);
104 outb(0x01, REG);
105 outb(0x55, REG);
106 outb(0x55, REG);
107 }
108
109 static inline void
110 superio_exit(void)
111 {
112 outb(0x02, REG);
113 outb(0x02, VAL);
114 }
115
116 /* Logical device 4 registers */
117 #define IT8712F_DEVID 0x8712
118 #define IT8705F_DEVID 0x8705
119 #define IT8716F_DEVID 0x8716
120 #define IT8718F_DEVID 0x8718
121 #define IT8720F_DEVID 0x8720
122 #define IT8726F_DEVID 0x8726
123 #define IT87_ACT_REG 0x30
124 #define IT87_BASE_REG 0x60
125
126 /* Logical device 7 registers (IT8712F and later) */
127 #define IT87_SIO_GPIO3_REG 0x27
128 #define IT87_SIO_GPIO5_REG 0x29
129 #define IT87_SIO_PINX2_REG 0x2c /* Pin selection */
130 #define IT87_SIO_VID_REG 0xfc /* VID value */
131 #define IT87_SIO_BEEP_PIN_REG 0xf6 /* Beep pin mapping */
132
133 /* Update battery voltage after every reading if true */
134 static int update_vbat;
135
136 /* Not all BIOSes properly configure the PWM registers */
137 static int fix_pwm_polarity;
138
139 /* Many IT87 constants specified below */
140
141 /* Length of ISA address segment */
142 #define IT87_EXTENT 8
143
144 /* Length of ISA address segment for Environmental Controller */
145 #define IT87_EC_EXTENT 2
146
147 /* Offset of EC registers from ISA base address */
148 #define IT87_EC_OFFSET 5
149
150 /* Where are the ISA address/data registers relative to the EC base address */
151 #define IT87_ADDR_REG_OFFSET 0
152 #define IT87_DATA_REG_OFFSET 1
153
154 /*----- The IT87 registers -----*/
155
156 #define IT87_REG_CONFIG 0x00
157
158 #define IT87_REG_ALARM1 0x01
159 #define IT87_REG_ALARM2 0x02
160 #define IT87_REG_ALARM3 0x03
161
162 /* The IT8718F and IT8720F have the VID value in a different register, in
163 Super-I/O configuration space. */
164 #define IT87_REG_VID 0x0a
165 /* The IT8705F and IT8712F earlier than revision 0x08 use register 0x0b
166 for fan divisors. Later IT8712F revisions must use 16-bit tachometer
167 mode. */
168 #define IT87_REG_FAN_DIV 0x0b
169 #define IT87_REG_FAN_16BIT 0x0c
170
171 /* Monitors: 9 voltage (0 to 7, battery), 3 temp (1 to 3), 3 fan (1 to 3) */
172
173 static const u8 IT87_REG_FAN[] = { 0x0d, 0x0e, 0x0f, 0x80, 0x82 };
174 static const u8 IT87_REG_FAN_MIN[] = { 0x10, 0x11, 0x12, 0x84, 0x86 };
175 static const u8 IT87_REG_FANX[] = { 0x18, 0x19, 0x1a, 0x81, 0x83 };
176 static const u8 IT87_REG_FANX_MIN[] = { 0x1b, 0x1c, 0x1d, 0x85, 0x87 };
177 #define IT87_REG_FAN_MAIN_CTRL 0x13
178 #define IT87_REG_FAN_CTL 0x14
179 #define IT87_REG_PWM(nr) (0x15 + (nr))
180
181 #define IT87_REG_VIN(nr) (0x20 + (nr))
182 #define IT87_REG_TEMP(nr) (0x29 + (nr))
183
184 #define IT87_REG_VIN_MAX(nr) (0x30 + (nr) * 2)
185 #define IT87_REG_VIN_MIN(nr) (0x31 + (nr) * 2)
186 #define IT87_REG_TEMP_HIGH(nr) (0x40 + (nr) * 2)
187 #define IT87_REG_TEMP_LOW(nr) (0x41 + (nr) * 2)
188
189 #define IT87_REG_VIN_ENABLE 0x50
190 #define IT87_REG_TEMP_ENABLE 0x51
191 #define IT87_REG_BEEP_ENABLE 0x5c
192
193 #define IT87_REG_CHIPID 0x58
194
195 #define IT87_REG_AUTO_TEMP(nr, i) (0x60 + (nr) * 8 + (i))
196 #define IT87_REG_AUTO_PWM(nr, i) (0x65 + (nr) * 8 + (i))
197
198 #define IN_TO_REG(val) (SENSORS_LIMIT((((val) + 8)/16),0,255))
199 #define IN_FROM_REG(val) ((val) * 16)
200
201 static inline u8 FAN_TO_REG(long rpm, int div)
202 {
203 if (rpm == 0)
204 return 255;
205 rpm = SENSORS_LIMIT(rpm, 1, 1000000);
206 return SENSORS_LIMIT((1350000 + rpm * div / 2) / (rpm * div), 1,
207 254);
208 }
209
210 static inline u16 FAN16_TO_REG(long rpm)
211 {
212 if (rpm == 0)
213 return 0xffff;
214 return SENSORS_LIMIT((1350000 + rpm) / (rpm * 2), 1, 0xfffe);
215 }
216
217 #define FAN_FROM_REG(val,div) ((val)==0?-1:(val)==255?0:1350000/((val)*(div)))
218 /* The divider is fixed to 2 in 16-bit mode */
219 #define FAN16_FROM_REG(val) ((val)==0?-1:(val)==0xffff?0:1350000/((val)*2))
220
221 #define TEMP_TO_REG(val) (SENSORS_LIMIT(((val)<0?(((val)-500)/1000):\
222 ((val)+500)/1000),-128,127))
223 #define TEMP_FROM_REG(val) ((val) * 1000)
224
225 #define PWM_TO_REG(val) ((val) >> 1)
226 #define PWM_FROM_REG(val) (((val)&0x7f) << 1)
227
228 static int DIV_TO_REG(int val)
229 {
230 int answer = 0;
231 while (answer < 7 && (val >>= 1))
232 answer++;
233 return answer;
234 }
235 #define DIV_FROM_REG(val) (1 << (val))
236
237 static const unsigned int pwm_freq[8] = {
238 48000000 / 128,
239 24000000 / 128,
240 12000000 / 128,
241 8000000 / 128,
242 6000000 / 128,
243 3000000 / 128,
244 1500000 / 128,
245 750000 / 128,
246 };
247
248
249 struct it87_sio_data {
250 enum chips type;
251 /* Values read from Super-I/O config space */
252 u8 revision;
253 u8 vid_value;
254 u8 beep_pin;
255 /* Features skipped based on config or DMI */
256 u8 skip_vid;
257 u8 skip_fan;
258 u8 skip_pwm;
259 };
260
261 /* For each registered chip, we need to keep some data in memory.
262 The structure is dynamically allocated. */
263 struct it87_data {
264 struct device *hwmon_dev;
265 enum chips type;
266 u8 revision;
267
268 unsigned short addr;
269 const char *name;
270 struct mutex update_lock;
271 char valid; /* !=0 if following fields are valid */
272 unsigned long last_updated; /* In jiffies */
273
274 u8 in[9]; /* Register value */
275 u8 in_max[8]; /* Register value */
276 u8 in_min[8]; /* Register value */
277 u8 has_fan; /* Bitfield, fans enabled */
278 u16 fan[5]; /* Register values, possibly combined */
279 u16 fan_min[5]; /* Register values, possibly combined */
280 s8 temp[3]; /* Register value */
281 s8 temp_high[3]; /* Register value */
282 s8 temp_low[3]; /* Register value */
283 u8 sensor; /* Register value */
284 u8 fan_div[3]; /* Register encoding, shifted right */
285 u8 vid; /* Register encoding, combined */
286 u8 vrm;
287 u32 alarms; /* Register encoding, combined */
288 u8 beeps; /* Register encoding */
289 u8 fan_main_ctrl; /* Register value */
290 u8 fan_ctl; /* Register value */
291
292 /* The following 3 arrays correspond to the same registers. The
293 * meaning of bits 6-0 depends on the value of bit 7, and we want
294 * to preserve settings on mode changes, so we have to track all
295 * values separately. */
296 u8 pwm_ctrl[3]; /* Register value */
297 u8 pwm_duty[3]; /* Manual PWM value set by user (bit 6-0) */
298 u8 pwm_temp_map[3]; /* PWM to temp. chan. mapping (bits 1-0) */
299
300 /* Automatic fan speed control registers */
301 u8 auto_pwm[3][4]; /* [nr][3] is hard-coded */
302 s8 auto_temp[3][5]; /* [nr][0] is point1_temp_hyst */
303 };
304
305 static inline int has_16bit_fans(const struct it87_data *data)
306 {
307 /* IT8705F Datasheet 0.4.1, 3h == Version G.
308 IT8712F Datasheet 0.9.1, section 8.3.5 indicates 8h == Version J.
309 These are the first revisions with 16bit tachometer support. */
310 return (data->type == it87 && data->revision >= 0x03)
311 || (data->type == it8712 && data->revision >= 0x08)
312 || data->type == it8716
313 || data->type == it8718
314 || data->type == it8720;
315 }
316
317 static inline int has_old_autopwm(const struct it87_data *data)
318 {
319 /* The old automatic fan speed control interface is implemented
320 by IT8705F chips up to revision F and IT8712F chips up to
321 revision G. */
322 return (data->type == it87 && data->revision < 0x03)
323 || (data->type == it8712 && data->revision < 0x08);
324 }
325
326 static int it87_probe(struct platform_device *pdev);
327 static int __devexit it87_remove(struct platform_device *pdev);
328
329 static int it87_read_value(struct it87_data *data, u8 reg);
330 static void it87_write_value(struct it87_data *data, u8 reg, u8 value);
331 static struct it87_data *it87_update_device(struct device *dev);
332 static int it87_check_pwm(struct device *dev);
333 static void it87_init_device(struct platform_device *pdev);
334
335
336 static struct platform_driver it87_driver = {
337 .driver = {
338 .owner = THIS_MODULE,
339 .name = DRVNAME,
340 },
341 .probe = it87_probe,
342 .remove = __devexit_p(it87_remove),
343 };
344
345 static ssize_t show_in(struct device *dev, struct device_attribute *attr,
346 char *buf)
347 {
348 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
349 int nr = sensor_attr->index;
350
351 struct it87_data *data = it87_update_device(dev);
352 return sprintf(buf, "%d\n", IN_FROM_REG(data->in[nr]));
353 }
354
355 static ssize_t show_in_min(struct device *dev, struct device_attribute *attr,
356 char *buf)
357 {
358 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
359 int nr = sensor_attr->index;
360
361 struct it87_data *data = it87_update_device(dev);
362 return sprintf(buf, "%d\n", IN_FROM_REG(data->in_min[nr]));
363 }
364
365 static ssize_t show_in_max(struct device *dev, struct device_attribute *attr,
366 char *buf)
367 {
368 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
369 int nr = sensor_attr->index;
370
371 struct it87_data *data = it87_update_device(dev);
372 return sprintf(buf, "%d\n", IN_FROM_REG(data->in_max[nr]));
373 }
374
375 static ssize_t set_in_min(struct device *dev, struct device_attribute *attr,
376 const char *buf, size_t count)
377 {
378 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
379 int nr = sensor_attr->index;
380
381 struct it87_data *data = dev_get_drvdata(dev);
382 unsigned long val;
383
384 if (strict_strtoul(buf, 10, &val) < 0)
385 return -EINVAL;
386
387 mutex_lock(&data->update_lock);
388 data->in_min[nr] = IN_TO_REG(val);
389 it87_write_value(data, IT87_REG_VIN_MIN(nr),
390 data->in_min[nr]);
391 mutex_unlock(&data->update_lock);
392 return count;
393 }
394 static ssize_t set_in_max(struct device *dev, struct device_attribute *attr,
395 const char *buf, size_t count)
396 {
397 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
398 int nr = sensor_attr->index;
399
400 struct it87_data *data = dev_get_drvdata(dev);
401 unsigned long val;
402
403 if (strict_strtoul(buf, 10, &val) < 0)
404 return -EINVAL;
405
406 mutex_lock(&data->update_lock);
407 data->in_max[nr] = IN_TO_REG(val);
408 it87_write_value(data, IT87_REG_VIN_MAX(nr),
409 data->in_max[nr]);
410 mutex_unlock(&data->update_lock);
411 return count;
412 }
413
414 #define show_in_offset(offset) \
415 static SENSOR_DEVICE_ATTR(in##offset##_input, S_IRUGO, \
416 show_in, NULL, offset);
417
418 #define limit_in_offset(offset) \
419 static SENSOR_DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \
420 show_in_min, set_in_min, offset); \
421 static SENSOR_DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \
422 show_in_max, set_in_max, offset);
423
424 show_in_offset(0);
425 limit_in_offset(0);
426 show_in_offset(1);
427 limit_in_offset(1);
428 show_in_offset(2);
429 limit_in_offset(2);
430 show_in_offset(3);
431 limit_in_offset(3);
432 show_in_offset(4);
433 limit_in_offset(4);
434 show_in_offset(5);
435 limit_in_offset(5);
436 show_in_offset(6);
437 limit_in_offset(6);
438 show_in_offset(7);
439 limit_in_offset(7);
440 show_in_offset(8);
441
442 /* 3 temperatures */
443 static ssize_t show_temp(struct device *dev, struct device_attribute *attr,
444 char *buf)
445 {
446 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
447 int nr = sensor_attr->index;
448
449 struct it87_data *data = it87_update_device(dev);
450 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[nr]));
451 }
452 static ssize_t show_temp_max(struct device *dev, struct device_attribute *attr,
453 char *buf)
454 {
455 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
456 int nr = sensor_attr->index;
457
458 struct it87_data *data = it87_update_device(dev);
459 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_high[nr]));
460 }
461 static ssize_t show_temp_min(struct device *dev, struct device_attribute *attr,
462 char *buf)
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 = it87_update_device(dev);
468 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_low[nr]));
469 }
470 static ssize_t set_temp_max(struct device *dev, struct device_attribute *attr,
471 const char *buf, size_t count)
472 {
473 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
474 int nr = sensor_attr->index;
475
476 struct it87_data *data = dev_get_drvdata(dev);
477 long val;
478
479 if (strict_strtol(buf, 10, &val) < 0)
480 return -EINVAL;
481
482 mutex_lock(&data->update_lock);
483 data->temp_high[nr] = TEMP_TO_REG(val);
484 it87_write_value(data, IT87_REG_TEMP_HIGH(nr), data->temp_high[nr]);
485 mutex_unlock(&data->update_lock);
486 return count;
487 }
488 static ssize_t set_temp_min(struct device *dev, struct device_attribute *attr,
489 const char *buf, size_t count)
490 {
491 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
492 int nr = sensor_attr->index;
493
494 struct it87_data *data = dev_get_drvdata(dev);
495 long val;
496
497 if (strict_strtol(buf, 10, &val) < 0)
498 return -EINVAL;
499
500 mutex_lock(&data->update_lock);
501 data->temp_low[nr] = TEMP_TO_REG(val);
502 it87_write_value(data, IT87_REG_TEMP_LOW(nr), data->temp_low[nr]);
503 mutex_unlock(&data->update_lock);
504 return count;
505 }
506 #define show_temp_offset(offset) \
507 static SENSOR_DEVICE_ATTR(temp##offset##_input, S_IRUGO, \
508 show_temp, NULL, offset - 1); \
509 static SENSOR_DEVICE_ATTR(temp##offset##_max, S_IRUGO | S_IWUSR, \
510 show_temp_max, set_temp_max, offset - 1); \
511 static SENSOR_DEVICE_ATTR(temp##offset##_min, S_IRUGO | S_IWUSR, \
512 show_temp_min, set_temp_min, offset - 1);
513
514 show_temp_offset(1);
515 show_temp_offset(2);
516 show_temp_offset(3);
517
518 static ssize_t show_sensor(struct device *dev, struct device_attribute *attr,
519 char *buf)
520 {
521 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
522 int nr = sensor_attr->index;
523
524 struct it87_data *data = it87_update_device(dev);
525 u8 reg = data->sensor; /* In case the value is updated while
526 we use it */
527
528 if (reg & (1 << nr))
529 return sprintf(buf, "3\n"); /* thermal diode */
530 if (reg & (8 << nr))
531 return sprintf(buf, "4\n"); /* thermistor */
532 return sprintf(buf, "0\n"); /* disabled */
533 }
534 static ssize_t set_sensor(struct device *dev, struct device_attribute *attr,
535 const char *buf, size_t count)
536 {
537 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
538 int nr = sensor_attr->index;
539
540 struct it87_data *data = dev_get_drvdata(dev);
541 long val;
542
543 if (strict_strtol(buf, 10, &val) < 0)
544 return -EINVAL;
545
546 mutex_lock(&data->update_lock);
547
548 data->sensor &= ~(1 << nr);
549 data->sensor &= ~(8 << nr);
550 if (val == 2) { /* backwards compatibility */
551 dev_warn(dev, "Sensor type 2 is deprecated, please use 4 "
552 "instead\n");
553 val = 4;
554 }
555 /* 3 = thermal diode; 4 = thermistor; 0 = disabled */
556 if (val == 3)
557 data->sensor |= 1 << nr;
558 else if (val == 4)
559 data->sensor |= 8 << nr;
560 else if (val != 0) {
561 mutex_unlock(&data->update_lock);
562 return -EINVAL;
563 }
564 it87_write_value(data, IT87_REG_TEMP_ENABLE, data->sensor);
565 mutex_unlock(&data->update_lock);
566 return count;
567 }
568 #define show_sensor_offset(offset) \
569 static SENSOR_DEVICE_ATTR(temp##offset##_type, S_IRUGO | S_IWUSR, \
570 show_sensor, set_sensor, offset - 1);
571
572 show_sensor_offset(1);
573 show_sensor_offset(2);
574 show_sensor_offset(3);
575
576 /* 3 Fans */
577
578 static int pwm_mode(const struct it87_data *data, int nr)
579 {
580 int ctrl = data->fan_main_ctrl & (1 << nr);
581
582 if (ctrl == 0) /* Full speed */
583 return 0;
584 if (data->pwm_ctrl[nr] & 0x80) /* Automatic mode */
585 return 2;
586 else /* Manual mode */
587 return 1;
588 }
589
590 static ssize_t show_fan(struct device *dev, struct device_attribute *attr,
591 char *buf)
592 {
593 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
594 int nr = sensor_attr->index;
595
596 struct it87_data *data = it87_update_device(dev);
597 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[nr],
598 DIV_FROM_REG(data->fan_div[nr])));
599 }
600 static ssize_t show_fan_min(struct device *dev, struct device_attribute *attr,
601 char *buf)
602 {
603 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
604 int nr = sensor_attr->index;
605
606 struct it87_data *data = it87_update_device(dev);
607 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[nr],
608 DIV_FROM_REG(data->fan_div[nr])));
609 }
610 static ssize_t show_fan_div(struct device *dev, struct device_attribute *attr,
611 char *buf)
612 {
613 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
614 int nr = sensor_attr->index;
615
616 struct it87_data *data = it87_update_device(dev);
617 return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr]));
618 }
619 static ssize_t show_pwm_enable(struct device *dev,
620 struct device_attribute *attr, char *buf)
621 {
622 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
623 int nr = sensor_attr->index;
624
625 struct it87_data *data = it87_update_device(dev);
626 return sprintf(buf, "%d\n", pwm_mode(data, nr));
627 }
628 static ssize_t show_pwm(struct device *dev, struct device_attribute *attr,
629 char *buf)
630 {
631 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
632 int nr = sensor_attr->index;
633
634 struct it87_data *data = it87_update_device(dev);
635 return sprintf(buf, "%d\n", PWM_FROM_REG(data->pwm_duty[nr]));
636 }
637 static ssize_t show_pwm_freq(struct device *dev, struct device_attribute *attr,
638 char *buf)
639 {
640 struct it87_data *data = it87_update_device(dev);
641 int index = (data->fan_ctl >> 4) & 0x07;
642
643 return sprintf(buf, "%u\n", pwm_freq[index]);
644 }
645 static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr,
646 const char *buf, size_t count)
647 {
648 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
649 int nr = sensor_attr->index;
650
651 struct it87_data *data = dev_get_drvdata(dev);
652 long val;
653 u8 reg;
654
655 if (strict_strtol(buf, 10, &val) < 0)
656 return -EINVAL;
657
658 mutex_lock(&data->update_lock);
659 reg = it87_read_value(data, IT87_REG_FAN_DIV);
660 switch (nr) {
661 case 0:
662 data->fan_div[nr] = reg & 0x07;
663 break;
664 case 1:
665 data->fan_div[nr] = (reg >> 3) & 0x07;
666 break;
667 case 2:
668 data->fan_div[nr] = (reg & 0x40) ? 3 : 1;
669 break;
670 }
671
672 data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr]));
673 it87_write_value(data, IT87_REG_FAN_MIN[nr], data->fan_min[nr]);
674 mutex_unlock(&data->update_lock);
675 return count;
676 }
677 static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr,
678 const char *buf, size_t count)
679 {
680 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
681 int nr = sensor_attr->index;
682
683 struct it87_data *data = dev_get_drvdata(dev);
684 unsigned long val;
685 int min;
686 u8 old;
687
688 if (strict_strtoul(buf, 10, &val) < 0)
689 return -EINVAL;
690
691 mutex_lock(&data->update_lock);
692 old = it87_read_value(data, IT87_REG_FAN_DIV);
693
694 /* Save fan min limit */
695 min = FAN_FROM_REG(data->fan_min[nr], DIV_FROM_REG(data->fan_div[nr]));
696
697 switch (nr) {
698 case 0:
699 case 1:
700 data->fan_div[nr] = DIV_TO_REG(val);
701 break;
702 case 2:
703 if (val < 8)
704 data->fan_div[nr] = 1;
705 else
706 data->fan_div[nr] = 3;
707 }
708 val = old & 0x80;
709 val |= (data->fan_div[0] & 0x07);
710 val |= (data->fan_div[1] & 0x07) << 3;
711 if (data->fan_div[2] == 3)
712 val |= 0x1 << 6;
713 it87_write_value(data, IT87_REG_FAN_DIV, val);
714
715 /* Restore fan min limit */
716 data->fan_min[nr] = FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr]));
717 it87_write_value(data, IT87_REG_FAN_MIN[nr], data->fan_min[nr]);
718
719 mutex_unlock(&data->update_lock);
720 return count;
721 }
722
723 /* Returns 0 if OK, -EINVAL otherwise */
724 static int check_trip_points(struct device *dev, int nr)
725 {
726 const struct it87_data *data = dev_get_drvdata(dev);
727 int i, err = 0;
728
729 if (has_old_autopwm(data)) {
730 for (i = 0; i < 3; i++) {
731 if (data->auto_temp[nr][i] > data->auto_temp[nr][i + 1])
732 err = -EINVAL;
733 }
734 for (i = 0; i < 2; i++) {
735 if (data->auto_pwm[nr][i] > data->auto_pwm[nr][i + 1])
736 err = -EINVAL;
737 }
738 }
739
740 if (err) {
741 dev_err(dev, "Inconsistent trip points, not switching to "
742 "automatic mode\n");
743 dev_err(dev, "Adjust the trip points and try again\n");
744 }
745 return err;
746 }
747
748 static ssize_t set_pwm_enable(struct device *dev,
749 struct device_attribute *attr, const char *buf, size_t count)
750 {
751 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
752 int nr = sensor_attr->index;
753
754 struct it87_data *data = dev_get_drvdata(dev);
755 long val;
756
757 if (strict_strtol(buf, 10, &val) < 0 || val < 0 || val > 2)
758 return -EINVAL;
759
760 /* Check trip points before switching to automatic mode */
761 if (val == 2) {
762 if (check_trip_points(dev, nr) < 0)
763 return -EINVAL;
764 }
765
766 mutex_lock(&data->update_lock);
767
768 if (val == 0) {
769 int tmp;
770 /* make sure the fan is on when in on/off mode */
771 tmp = it87_read_value(data, IT87_REG_FAN_CTL);
772 it87_write_value(data, IT87_REG_FAN_CTL, tmp | (1 << nr));
773 /* set on/off mode */
774 data->fan_main_ctrl &= ~(1 << nr);
775 it87_write_value(data, IT87_REG_FAN_MAIN_CTRL,
776 data->fan_main_ctrl);
777 } else {
778 if (val == 1) /* Manual mode */
779 data->pwm_ctrl[nr] = data->pwm_duty[nr];
780 else /* Automatic mode */
781 data->pwm_ctrl[nr] = 0x80 | data->pwm_temp_map[nr];
782 it87_write_value(data, IT87_REG_PWM(nr), data->pwm_ctrl[nr]);
783 /* set SmartGuardian mode */
784 data->fan_main_ctrl |= (1 << nr);
785 it87_write_value(data, IT87_REG_FAN_MAIN_CTRL,
786 data->fan_main_ctrl);
787 }
788
789 mutex_unlock(&data->update_lock);
790 return count;
791 }
792 static ssize_t set_pwm(struct device *dev, struct device_attribute *attr,
793 const char *buf, size_t count)
794 {
795 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
796 int nr = sensor_attr->index;
797
798 struct it87_data *data = dev_get_drvdata(dev);
799 long val;
800
801 if (strict_strtol(buf, 10, &val) < 0 || val < 0 || val > 255)
802 return -EINVAL;
803
804 mutex_lock(&data->update_lock);
805 data->pwm_duty[nr] = PWM_TO_REG(val);
806 /* If we are in manual mode, write the duty cycle immediately;
807 * otherwise, just store it for later use. */
808 if (!(data->pwm_ctrl[nr] & 0x80)) {
809 data->pwm_ctrl[nr] = data->pwm_duty[nr];
810 it87_write_value(data, IT87_REG_PWM(nr), data->pwm_ctrl[nr]);
811 }
812 mutex_unlock(&data->update_lock);
813 return count;
814 }
815 static ssize_t set_pwm_freq(struct device *dev,
816 struct device_attribute *attr, const char *buf, size_t count)
817 {
818 struct it87_data *data = dev_get_drvdata(dev);
819 unsigned long val;
820 int i;
821
822 if (strict_strtoul(buf, 10, &val) < 0)
823 return -EINVAL;
824
825 /* Search for the nearest available frequency */
826 for (i = 0; i < 7; i++) {
827 if (val > (pwm_freq[i] + pwm_freq[i+1]) / 2)
828 break;
829 }
830
831 mutex_lock(&data->update_lock);
832 data->fan_ctl = it87_read_value(data, IT87_REG_FAN_CTL) & 0x8f;
833 data->fan_ctl |= i << 4;
834 it87_write_value(data, IT87_REG_FAN_CTL, data->fan_ctl);
835 mutex_unlock(&data->update_lock);
836
837 return count;
838 }
839 static ssize_t show_pwm_temp_map(struct device *dev,
840 struct device_attribute *attr, char *buf)
841 {
842 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
843 int nr = sensor_attr->index;
844
845 struct it87_data *data = it87_update_device(dev);
846 int map;
847
848 if (data->pwm_temp_map[nr] < 3)
849 map = 1 << data->pwm_temp_map[nr];
850 else
851 map = 0; /* Should never happen */
852 return sprintf(buf, "%d\n", map);
853 }
854 static ssize_t set_pwm_temp_map(struct device *dev,
855 struct device_attribute *attr, const char *buf, size_t count)
856 {
857 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
858 int nr = sensor_attr->index;
859
860 struct it87_data *data = dev_get_drvdata(dev);
861 long val;
862 u8 reg;
863
864 /* This check can go away if we ever support automatic fan speed
865 control on newer chips. */
866 if (!has_old_autopwm(data)) {
867 dev_notice(dev, "Mapping change disabled for safety reasons\n");
868 return -EINVAL;
869 }
870
871 if (strict_strtol(buf, 10, &val) < 0)
872 return -EINVAL;
873
874 switch (val) {
875 case (1 << 0):
876 reg = 0x00;
877 break;
878 case (1 << 1):
879 reg = 0x01;
880 break;
881 case (1 << 2):
882 reg = 0x02;
883 break;
884 default:
885 return -EINVAL;
886 }
887
888 mutex_lock(&data->update_lock);
889 data->pwm_temp_map[nr] = reg;
890 /* If we are in automatic mode, write the temp mapping immediately;
891 * otherwise, just store it for later use. */
892 if (data->pwm_ctrl[nr] & 0x80) {
893 data->pwm_ctrl[nr] = 0x80 | data->pwm_temp_map[nr];
894 it87_write_value(data, IT87_REG_PWM(nr), data->pwm_ctrl[nr]);
895 }
896 mutex_unlock(&data->update_lock);
897 return count;
898 }
899
900 static ssize_t show_auto_pwm(struct device *dev,
901 struct device_attribute *attr, char *buf)
902 {
903 struct it87_data *data = it87_update_device(dev);
904 struct sensor_device_attribute_2 *sensor_attr =
905 to_sensor_dev_attr_2(attr);
906 int nr = sensor_attr->nr;
907 int point = sensor_attr->index;
908
909 return sprintf(buf, "%d\n", PWM_FROM_REG(data->auto_pwm[nr][point]));
910 }
911
912 static ssize_t set_auto_pwm(struct device *dev,
913 struct device_attribute *attr, const char *buf, size_t count)
914 {
915 struct it87_data *data = dev_get_drvdata(dev);
916 struct sensor_device_attribute_2 *sensor_attr =
917 to_sensor_dev_attr_2(attr);
918 int nr = sensor_attr->nr;
919 int point = sensor_attr->index;
920 long val;
921
922 if (strict_strtol(buf, 10, &val) < 0 || val < 0 || val > 255)
923 return -EINVAL;
924
925 mutex_lock(&data->update_lock);
926 data->auto_pwm[nr][point] = PWM_TO_REG(val);
927 it87_write_value(data, IT87_REG_AUTO_PWM(nr, point),
928 data->auto_pwm[nr][point]);
929 mutex_unlock(&data->update_lock);
930 return count;
931 }
932
933 static ssize_t show_auto_temp(struct device *dev,
934 struct device_attribute *attr, char *buf)
935 {
936 struct it87_data *data = it87_update_device(dev);
937 struct sensor_device_attribute_2 *sensor_attr =
938 to_sensor_dev_attr_2(attr);
939 int nr = sensor_attr->nr;
940 int point = sensor_attr->index;
941
942 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->auto_temp[nr][point]));
943 }
944
945 static ssize_t set_auto_temp(struct device *dev,
946 struct device_attribute *attr, const char *buf, size_t count)
947 {
948 struct it87_data *data = dev_get_drvdata(dev);
949 struct sensor_device_attribute_2 *sensor_attr =
950 to_sensor_dev_attr_2(attr);
951 int nr = sensor_attr->nr;
952 int point = sensor_attr->index;
953 long val;
954
955 if (strict_strtol(buf, 10, &val) < 0 || val < -128000 || val > 127000)
956 return -EINVAL;
957
958 mutex_lock(&data->update_lock);
959 data->auto_temp[nr][point] = TEMP_TO_REG(val);
960 it87_write_value(data, IT87_REG_AUTO_TEMP(nr, point),
961 data->auto_temp[nr][point]);
962 mutex_unlock(&data->update_lock);
963 return count;
964 }
965
966 #define show_fan_offset(offset) \
967 static SENSOR_DEVICE_ATTR(fan##offset##_input, S_IRUGO, \
968 show_fan, NULL, offset - 1); \
969 static SENSOR_DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \
970 show_fan_min, set_fan_min, offset - 1); \
971 static SENSOR_DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR, \
972 show_fan_div, set_fan_div, offset - 1);
973
974 show_fan_offset(1);
975 show_fan_offset(2);
976 show_fan_offset(3);
977
978 #define show_pwm_offset(offset) \
979 static SENSOR_DEVICE_ATTR(pwm##offset##_enable, S_IRUGO | S_IWUSR, \
980 show_pwm_enable, set_pwm_enable, offset - 1); \
981 static SENSOR_DEVICE_ATTR(pwm##offset, S_IRUGO | S_IWUSR, \
982 show_pwm, set_pwm, offset - 1); \
983 static DEVICE_ATTR(pwm##offset##_freq, \
984 (offset == 1 ? S_IRUGO | S_IWUSR : S_IRUGO), \
985 show_pwm_freq, (offset == 1 ? set_pwm_freq : NULL)); \
986 static SENSOR_DEVICE_ATTR(pwm##offset##_auto_channels_temp, \
987 S_IRUGO | S_IWUSR, show_pwm_temp_map, set_pwm_temp_map, \
988 offset - 1); \
989 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point1_pwm, \
990 S_IRUGO | S_IWUSR, show_auto_pwm, set_auto_pwm, \
991 offset - 1, 0); \
992 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point2_pwm, \
993 S_IRUGO | S_IWUSR, show_auto_pwm, set_auto_pwm, \
994 offset - 1, 1); \
995 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point3_pwm, \
996 S_IRUGO | S_IWUSR, show_auto_pwm, set_auto_pwm, \
997 offset - 1, 2); \
998 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point4_pwm, \
999 S_IRUGO, show_auto_pwm, NULL, offset - 1, 3); \
1000 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point1_temp, \
1001 S_IRUGO | S_IWUSR, show_auto_temp, set_auto_temp, \
1002 offset - 1, 1); \
1003 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point1_temp_hyst, \
1004 S_IRUGO | S_IWUSR, show_auto_temp, set_auto_temp, \
1005 offset - 1, 0); \
1006 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point2_temp, \
1007 S_IRUGO | S_IWUSR, show_auto_temp, set_auto_temp, \
1008 offset - 1, 2); \
1009 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point3_temp, \
1010 S_IRUGO | S_IWUSR, show_auto_temp, set_auto_temp, \
1011 offset - 1, 3); \
1012 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point4_temp, \
1013 S_IRUGO | S_IWUSR, show_auto_temp, set_auto_temp, \
1014 offset - 1, 4);
1015
1016 show_pwm_offset(1);
1017 show_pwm_offset(2);
1018 show_pwm_offset(3);
1019
1020 /* A different set of callbacks for 16-bit fans */
1021 static ssize_t show_fan16(struct device *dev, struct device_attribute *attr,
1022 char *buf)
1023 {
1024 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
1025 int nr = sensor_attr->index;
1026 struct it87_data *data = it87_update_device(dev);
1027 return sprintf(buf, "%d\n", FAN16_FROM_REG(data->fan[nr]));
1028 }
1029
1030 static ssize_t show_fan16_min(struct device *dev, struct device_attribute *attr,
1031 char *buf)
1032 {
1033 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
1034 int nr = sensor_attr->index;
1035 struct it87_data *data = it87_update_device(dev);
1036 return sprintf(buf, "%d\n", FAN16_FROM_REG(data->fan_min[nr]));
1037 }
1038
1039 static ssize_t set_fan16_min(struct device *dev, struct device_attribute *attr,
1040 const char *buf, size_t count)
1041 {
1042 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
1043 int nr = sensor_attr->index;
1044 struct it87_data *data = dev_get_drvdata(dev);
1045 long val;
1046
1047 if (strict_strtol(buf, 10, &val) < 0)
1048 return -EINVAL;
1049
1050 mutex_lock(&data->update_lock);
1051 data->fan_min[nr] = FAN16_TO_REG(val);
1052 it87_write_value(data, IT87_REG_FAN_MIN[nr],
1053 data->fan_min[nr] & 0xff);
1054 it87_write_value(data, IT87_REG_FANX_MIN[nr],
1055 data->fan_min[nr] >> 8);
1056 mutex_unlock(&data->update_lock);
1057 return count;
1058 }
1059
1060 /* We want to use the same sysfs file names as 8-bit fans, but we need
1061 different variable names, so we have to use SENSOR_ATTR instead of
1062 SENSOR_DEVICE_ATTR. */
1063 #define show_fan16_offset(offset) \
1064 static struct sensor_device_attribute sensor_dev_attr_fan##offset##_input16 \
1065 = SENSOR_ATTR(fan##offset##_input, S_IRUGO, \
1066 show_fan16, NULL, offset - 1); \
1067 static struct sensor_device_attribute sensor_dev_attr_fan##offset##_min16 \
1068 = SENSOR_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \
1069 show_fan16_min, set_fan16_min, offset - 1)
1070
1071 show_fan16_offset(1);
1072 show_fan16_offset(2);
1073 show_fan16_offset(3);
1074 show_fan16_offset(4);
1075 show_fan16_offset(5);
1076
1077 /* Alarms */
1078 static ssize_t show_alarms(struct device *dev, struct device_attribute *attr,
1079 char *buf)
1080 {
1081 struct it87_data *data = it87_update_device(dev);
1082 return sprintf(buf, "%u\n", data->alarms);
1083 }
1084 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
1085
1086 static ssize_t show_alarm(struct device *dev, struct device_attribute *attr,
1087 char *buf)
1088 {
1089 int bitnr = to_sensor_dev_attr(attr)->index;
1090 struct it87_data *data = it87_update_device(dev);
1091 return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1);
1092 }
1093 static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 8);
1094 static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 9);
1095 static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 10);
1096 static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 11);
1097 static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 12);
1098 static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 13);
1099 static SENSOR_DEVICE_ATTR(in6_alarm, S_IRUGO, show_alarm, NULL, 14);
1100 static SENSOR_DEVICE_ATTR(in7_alarm, S_IRUGO, show_alarm, NULL, 15);
1101 static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 0);
1102 static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 1);
1103 static SENSOR_DEVICE_ATTR(fan3_alarm, S_IRUGO, show_alarm, NULL, 2);
1104 static SENSOR_DEVICE_ATTR(fan4_alarm, S_IRUGO, show_alarm, NULL, 3);
1105 static SENSOR_DEVICE_ATTR(fan5_alarm, S_IRUGO, show_alarm, NULL, 6);
1106 static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 16);
1107 static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 17);
1108 static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL, 18);
1109
1110 static ssize_t show_beep(struct device *dev, struct device_attribute *attr,
1111 char *buf)
1112 {
1113 int bitnr = to_sensor_dev_attr(attr)->index;
1114 struct it87_data *data = it87_update_device(dev);
1115 return sprintf(buf, "%u\n", (data->beeps >> bitnr) & 1);
1116 }
1117 static ssize_t set_beep(struct device *dev, struct device_attribute *attr,
1118 const char *buf, size_t count)
1119 {
1120 int bitnr = to_sensor_dev_attr(attr)->index;
1121 struct it87_data *data = dev_get_drvdata(dev);
1122 long val;
1123
1124 if (strict_strtol(buf, 10, &val) < 0
1125 || (val != 0 && val != 1))
1126 return -EINVAL;
1127
1128 mutex_lock(&data->update_lock);
1129 data->beeps = it87_read_value(data, IT87_REG_BEEP_ENABLE);
1130 if (val)
1131 data->beeps |= (1 << bitnr);
1132 else
1133 data->beeps &= ~(1 << bitnr);
1134 it87_write_value(data, IT87_REG_BEEP_ENABLE, data->beeps);
1135 mutex_unlock(&data->update_lock);
1136 return count;
1137 }
1138
1139 static SENSOR_DEVICE_ATTR(in0_beep, S_IRUGO | S_IWUSR,
1140 show_beep, set_beep, 1);
1141 static SENSOR_DEVICE_ATTR(in1_beep, S_IRUGO, show_beep, NULL, 1);
1142 static SENSOR_DEVICE_ATTR(in2_beep, S_IRUGO, show_beep, NULL, 1);
1143 static SENSOR_DEVICE_ATTR(in3_beep, S_IRUGO, show_beep, NULL, 1);
1144 static SENSOR_DEVICE_ATTR(in4_beep, S_IRUGO, show_beep, NULL, 1);
1145 static SENSOR_DEVICE_ATTR(in5_beep, S_IRUGO, show_beep, NULL, 1);
1146 static SENSOR_DEVICE_ATTR(in6_beep, S_IRUGO, show_beep, NULL, 1);
1147 static SENSOR_DEVICE_ATTR(in7_beep, S_IRUGO, show_beep, NULL, 1);
1148 /* fanX_beep writability is set later */
1149 static SENSOR_DEVICE_ATTR(fan1_beep, S_IRUGO, show_beep, set_beep, 0);
1150 static SENSOR_DEVICE_ATTR(fan2_beep, S_IRUGO, show_beep, set_beep, 0);
1151 static SENSOR_DEVICE_ATTR(fan3_beep, S_IRUGO, show_beep, set_beep, 0);
1152 static SENSOR_DEVICE_ATTR(fan4_beep, S_IRUGO, show_beep, set_beep, 0);
1153 static SENSOR_DEVICE_ATTR(fan5_beep, S_IRUGO, show_beep, set_beep, 0);
1154 static SENSOR_DEVICE_ATTR(temp1_beep, S_IRUGO | S_IWUSR,
1155 show_beep, set_beep, 2);
1156 static SENSOR_DEVICE_ATTR(temp2_beep, S_IRUGO, show_beep, NULL, 2);
1157 static SENSOR_DEVICE_ATTR(temp3_beep, S_IRUGO, show_beep, NULL, 2);
1158
1159 static ssize_t show_vrm_reg(struct device *dev, struct device_attribute *attr,
1160 char *buf)
1161 {
1162 struct it87_data *data = dev_get_drvdata(dev);
1163 return sprintf(buf, "%u\n", data->vrm);
1164 }
1165 static ssize_t store_vrm_reg(struct device *dev, struct device_attribute *attr,
1166 const char *buf, size_t count)
1167 {
1168 struct it87_data *data = dev_get_drvdata(dev);
1169 unsigned long val;
1170
1171 if (strict_strtoul(buf, 10, &val) < 0)
1172 return -EINVAL;
1173
1174 data->vrm = val;
1175
1176 return count;
1177 }
1178 static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm_reg, store_vrm_reg);
1179
1180 static ssize_t show_vid_reg(struct device *dev, struct device_attribute *attr,
1181 char *buf)
1182 {
1183 struct it87_data *data = it87_update_device(dev);
1184 return sprintf(buf, "%ld\n", (long) vid_from_reg(data->vid, data->vrm));
1185 }
1186 static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid_reg, NULL);
1187
1188 static ssize_t show_name(struct device *dev, struct device_attribute
1189 *devattr, char *buf)
1190 {
1191 struct it87_data *data = dev_get_drvdata(dev);
1192 return sprintf(buf, "%s\n", data->name);
1193 }
1194 static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
1195
1196 static struct attribute *it87_attributes[] = {
1197 &sensor_dev_attr_in0_input.dev_attr.attr,
1198 &sensor_dev_attr_in1_input.dev_attr.attr,
1199 &sensor_dev_attr_in2_input.dev_attr.attr,
1200 &sensor_dev_attr_in3_input.dev_attr.attr,
1201 &sensor_dev_attr_in4_input.dev_attr.attr,
1202 &sensor_dev_attr_in5_input.dev_attr.attr,
1203 &sensor_dev_attr_in6_input.dev_attr.attr,
1204 &sensor_dev_attr_in7_input.dev_attr.attr,
1205 &sensor_dev_attr_in8_input.dev_attr.attr,
1206 &sensor_dev_attr_in0_min.dev_attr.attr,
1207 &sensor_dev_attr_in1_min.dev_attr.attr,
1208 &sensor_dev_attr_in2_min.dev_attr.attr,
1209 &sensor_dev_attr_in3_min.dev_attr.attr,
1210 &sensor_dev_attr_in4_min.dev_attr.attr,
1211 &sensor_dev_attr_in5_min.dev_attr.attr,
1212 &sensor_dev_attr_in6_min.dev_attr.attr,
1213 &sensor_dev_attr_in7_min.dev_attr.attr,
1214 &sensor_dev_attr_in0_max.dev_attr.attr,
1215 &sensor_dev_attr_in1_max.dev_attr.attr,
1216 &sensor_dev_attr_in2_max.dev_attr.attr,
1217 &sensor_dev_attr_in3_max.dev_attr.attr,
1218 &sensor_dev_attr_in4_max.dev_attr.attr,
1219 &sensor_dev_attr_in5_max.dev_attr.attr,
1220 &sensor_dev_attr_in6_max.dev_attr.attr,
1221 &sensor_dev_attr_in7_max.dev_attr.attr,
1222 &sensor_dev_attr_in0_alarm.dev_attr.attr,
1223 &sensor_dev_attr_in1_alarm.dev_attr.attr,
1224 &sensor_dev_attr_in2_alarm.dev_attr.attr,
1225 &sensor_dev_attr_in3_alarm.dev_attr.attr,
1226 &sensor_dev_attr_in4_alarm.dev_attr.attr,
1227 &sensor_dev_attr_in5_alarm.dev_attr.attr,
1228 &sensor_dev_attr_in6_alarm.dev_attr.attr,
1229 &sensor_dev_attr_in7_alarm.dev_attr.attr,
1230
1231 &sensor_dev_attr_temp1_input.dev_attr.attr,
1232 &sensor_dev_attr_temp2_input.dev_attr.attr,
1233 &sensor_dev_attr_temp3_input.dev_attr.attr,
1234 &sensor_dev_attr_temp1_max.dev_attr.attr,
1235 &sensor_dev_attr_temp2_max.dev_attr.attr,
1236 &sensor_dev_attr_temp3_max.dev_attr.attr,
1237 &sensor_dev_attr_temp1_min.dev_attr.attr,
1238 &sensor_dev_attr_temp2_min.dev_attr.attr,
1239 &sensor_dev_attr_temp3_min.dev_attr.attr,
1240 &sensor_dev_attr_temp1_type.dev_attr.attr,
1241 &sensor_dev_attr_temp2_type.dev_attr.attr,
1242 &sensor_dev_attr_temp3_type.dev_attr.attr,
1243 &sensor_dev_attr_temp1_alarm.dev_attr.attr,
1244 &sensor_dev_attr_temp2_alarm.dev_attr.attr,
1245 &sensor_dev_attr_temp3_alarm.dev_attr.attr,
1246
1247 &dev_attr_alarms.attr,
1248 &dev_attr_name.attr,
1249 NULL
1250 };
1251
1252 static const struct attribute_group it87_group = {
1253 .attrs = it87_attributes,
1254 };
1255
1256 static struct attribute *it87_attributes_beep[] = {
1257 &sensor_dev_attr_in0_beep.dev_attr.attr,
1258 &sensor_dev_attr_in1_beep.dev_attr.attr,
1259 &sensor_dev_attr_in2_beep.dev_attr.attr,
1260 &sensor_dev_attr_in3_beep.dev_attr.attr,
1261 &sensor_dev_attr_in4_beep.dev_attr.attr,
1262 &sensor_dev_attr_in5_beep.dev_attr.attr,
1263 &sensor_dev_attr_in6_beep.dev_attr.attr,
1264 &sensor_dev_attr_in7_beep.dev_attr.attr,
1265
1266 &sensor_dev_attr_temp1_beep.dev_attr.attr,
1267 &sensor_dev_attr_temp2_beep.dev_attr.attr,
1268 &sensor_dev_attr_temp3_beep.dev_attr.attr,
1269 NULL
1270 };
1271
1272 static const struct attribute_group it87_group_beep = {
1273 .attrs = it87_attributes_beep,
1274 };
1275
1276 static struct attribute *it87_attributes_fan16[5][3+1] = { {
1277 &sensor_dev_attr_fan1_input16.dev_attr.attr,
1278 &sensor_dev_attr_fan1_min16.dev_attr.attr,
1279 &sensor_dev_attr_fan1_alarm.dev_attr.attr,
1280 NULL
1281 }, {
1282 &sensor_dev_attr_fan2_input16.dev_attr.attr,
1283 &sensor_dev_attr_fan2_min16.dev_attr.attr,
1284 &sensor_dev_attr_fan2_alarm.dev_attr.attr,
1285 NULL
1286 }, {
1287 &sensor_dev_attr_fan3_input16.dev_attr.attr,
1288 &sensor_dev_attr_fan3_min16.dev_attr.attr,
1289 &sensor_dev_attr_fan3_alarm.dev_attr.attr,
1290 NULL
1291 }, {
1292 &sensor_dev_attr_fan4_input16.dev_attr.attr,
1293 &sensor_dev_attr_fan4_min16.dev_attr.attr,
1294 &sensor_dev_attr_fan4_alarm.dev_attr.attr,
1295 NULL
1296 }, {
1297 &sensor_dev_attr_fan5_input16.dev_attr.attr,
1298 &sensor_dev_attr_fan5_min16.dev_attr.attr,
1299 &sensor_dev_attr_fan5_alarm.dev_attr.attr,
1300 NULL
1301 } };
1302
1303 static const struct attribute_group it87_group_fan16[5] = {
1304 { .attrs = it87_attributes_fan16[0] },
1305 { .attrs = it87_attributes_fan16[1] },
1306 { .attrs = it87_attributes_fan16[2] },
1307 { .attrs = it87_attributes_fan16[3] },
1308 { .attrs = it87_attributes_fan16[4] },
1309 };
1310
1311 static struct attribute *it87_attributes_fan[3][4+1] = { {
1312 &sensor_dev_attr_fan1_input.dev_attr.attr,
1313 &sensor_dev_attr_fan1_min.dev_attr.attr,
1314 &sensor_dev_attr_fan1_div.dev_attr.attr,
1315 &sensor_dev_attr_fan1_alarm.dev_attr.attr,
1316 NULL
1317 }, {
1318 &sensor_dev_attr_fan2_input.dev_attr.attr,
1319 &sensor_dev_attr_fan2_min.dev_attr.attr,
1320 &sensor_dev_attr_fan2_div.dev_attr.attr,
1321 &sensor_dev_attr_fan2_alarm.dev_attr.attr,
1322 NULL
1323 }, {
1324 &sensor_dev_attr_fan3_input.dev_attr.attr,
1325 &sensor_dev_attr_fan3_min.dev_attr.attr,
1326 &sensor_dev_attr_fan3_div.dev_attr.attr,
1327 &sensor_dev_attr_fan3_alarm.dev_attr.attr,
1328 NULL
1329 } };
1330
1331 static const struct attribute_group it87_group_fan[3] = {
1332 { .attrs = it87_attributes_fan[0] },
1333 { .attrs = it87_attributes_fan[1] },
1334 { .attrs = it87_attributes_fan[2] },
1335 };
1336
1337 static const struct attribute_group *
1338 it87_get_fan_group(const struct it87_data *data)
1339 {
1340 return has_16bit_fans(data) ? it87_group_fan16 : it87_group_fan;
1341 }
1342
1343 static struct attribute *it87_attributes_pwm[3][4+1] = { {
1344 &sensor_dev_attr_pwm1_enable.dev_attr.attr,
1345 &sensor_dev_attr_pwm1.dev_attr.attr,
1346 &dev_attr_pwm1_freq.attr,
1347 &sensor_dev_attr_pwm1_auto_channels_temp.dev_attr.attr,
1348 NULL
1349 }, {
1350 &sensor_dev_attr_pwm2_enable.dev_attr.attr,
1351 &sensor_dev_attr_pwm2.dev_attr.attr,
1352 &dev_attr_pwm2_freq.attr,
1353 &sensor_dev_attr_pwm2_auto_channels_temp.dev_attr.attr,
1354 NULL
1355 }, {
1356 &sensor_dev_attr_pwm3_enable.dev_attr.attr,
1357 &sensor_dev_attr_pwm3.dev_attr.attr,
1358 &dev_attr_pwm3_freq.attr,
1359 &sensor_dev_attr_pwm3_auto_channels_temp.dev_attr.attr,
1360 NULL
1361 } };
1362
1363 static const struct attribute_group it87_group_pwm[3] = {
1364 { .attrs = it87_attributes_pwm[0] },
1365 { .attrs = it87_attributes_pwm[1] },
1366 { .attrs = it87_attributes_pwm[2] },
1367 };
1368
1369 static struct attribute *it87_attributes_autopwm[3][9+1] = { {
1370 &sensor_dev_attr_pwm1_auto_point1_pwm.dev_attr.attr,
1371 &sensor_dev_attr_pwm1_auto_point2_pwm.dev_attr.attr,
1372 &sensor_dev_attr_pwm1_auto_point3_pwm.dev_attr.attr,
1373 &sensor_dev_attr_pwm1_auto_point4_pwm.dev_attr.attr,
1374 &sensor_dev_attr_pwm1_auto_point1_temp.dev_attr.attr,
1375 &sensor_dev_attr_pwm1_auto_point1_temp_hyst.dev_attr.attr,
1376 &sensor_dev_attr_pwm1_auto_point2_temp.dev_attr.attr,
1377 &sensor_dev_attr_pwm1_auto_point3_temp.dev_attr.attr,
1378 &sensor_dev_attr_pwm1_auto_point4_temp.dev_attr.attr,
1379 NULL
1380 }, {
1381 &sensor_dev_attr_pwm2_auto_point1_pwm.dev_attr.attr,
1382 &sensor_dev_attr_pwm2_auto_point2_pwm.dev_attr.attr,
1383 &sensor_dev_attr_pwm2_auto_point3_pwm.dev_attr.attr,
1384 &sensor_dev_attr_pwm2_auto_point4_pwm.dev_attr.attr,
1385 &sensor_dev_attr_pwm2_auto_point1_temp.dev_attr.attr,
1386 &sensor_dev_attr_pwm2_auto_point1_temp_hyst.dev_attr.attr,
1387 &sensor_dev_attr_pwm2_auto_point2_temp.dev_attr.attr,
1388 &sensor_dev_attr_pwm2_auto_point3_temp.dev_attr.attr,
1389 &sensor_dev_attr_pwm2_auto_point4_temp.dev_attr.attr,
1390 NULL
1391 }, {
1392 &sensor_dev_attr_pwm3_auto_point1_pwm.dev_attr.attr,
1393 &sensor_dev_attr_pwm3_auto_point2_pwm.dev_attr.attr,
1394 &sensor_dev_attr_pwm3_auto_point3_pwm.dev_attr.attr,
1395 &sensor_dev_attr_pwm3_auto_point4_pwm.dev_attr.attr,
1396 &sensor_dev_attr_pwm3_auto_point1_temp.dev_attr.attr,
1397 &sensor_dev_attr_pwm3_auto_point1_temp_hyst.dev_attr.attr,
1398 &sensor_dev_attr_pwm3_auto_point2_temp.dev_attr.attr,
1399 &sensor_dev_attr_pwm3_auto_point3_temp.dev_attr.attr,
1400 &sensor_dev_attr_pwm3_auto_point4_temp.dev_attr.attr,
1401 NULL
1402 } };
1403
1404 static const struct attribute_group it87_group_autopwm[3] = {
1405 { .attrs = it87_attributes_autopwm[0] },
1406 { .attrs = it87_attributes_autopwm[1] },
1407 { .attrs = it87_attributes_autopwm[2] },
1408 };
1409
1410 static struct attribute *it87_attributes_fan_beep[] = {
1411 &sensor_dev_attr_fan1_beep.dev_attr.attr,
1412 &sensor_dev_attr_fan2_beep.dev_attr.attr,
1413 &sensor_dev_attr_fan3_beep.dev_attr.attr,
1414 &sensor_dev_attr_fan4_beep.dev_attr.attr,
1415 &sensor_dev_attr_fan5_beep.dev_attr.attr,
1416 };
1417
1418 static struct attribute *it87_attributes_vid[] = {
1419 &dev_attr_vrm.attr,
1420 &dev_attr_cpu0_vid.attr,
1421 NULL
1422 };
1423
1424 static const struct attribute_group it87_group_vid = {
1425 .attrs = it87_attributes_vid,
1426 };
1427
1428 /* SuperIO detection - will change isa_address if a chip is found */
1429 static int __init it87_find(unsigned short *address,
1430 struct it87_sio_data *sio_data)
1431 {
1432 int err = -ENODEV;
1433 u16 chip_type;
1434 const char *board_vendor, *board_name;
1435
1436 superio_enter();
1437 chip_type = force_id ? force_id : superio_inw(DEVID);
1438
1439 switch (chip_type) {
1440 case IT8705F_DEVID:
1441 sio_data->type = it87;
1442 break;
1443 case IT8712F_DEVID:
1444 sio_data->type = it8712;
1445 break;
1446 case IT8716F_DEVID:
1447 case IT8726F_DEVID:
1448 sio_data->type = it8716;
1449 break;
1450 case IT8718F_DEVID:
1451 sio_data->type = it8718;
1452 break;
1453 case IT8720F_DEVID:
1454 sio_data->type = it8720;
1455 break;
1456 case 0xffff: /* No device at all */
1457 goto exit;
1458 default:
1459 pr_debug(DRVNAME ": Unsupported chip (DEVID=0x%x)\n",
1460 chip_type);
1461 goto exit;
1462 }
1463
1464 superio_select(PME);
1465 if (!(superio_inb(IT87_ACT_REG) & 0x01)) {
1466 pr_info("it87: Device not activated, skipping\n");
1467 goto exit;
1468 }
1469
1470 *address = superio_inw(IT87_BASE_REG) & ~(IT87_EXTENT - 1);
1471 if (*address == 0) {
1472 pr_info("it87: Base address not set, skipping\n");
1473 goto exit;
1474 }
1475
1476 err = 0;
1477 sio_data->revision = superio_inb(DEVREV) & 0x0f;
1478 pr_info("it87: Found IT%04xF chip at 0x%x, revision %d\n",
1479 chip_type, *address, sio_data->revision);
1480
1481 /* Read GPIO config and VID value from LDN 7 (GPIO) */
1482 if (sio_data->type == it87) {
1483 /* The IT8705F doesn't have VID pins at all */
1484 sio_data->skip_vid = 1;
1485
1486 /* The IT8705F has a different LD number for GPIO */
1487 superio_select(5);
1488 sio_data->beep_pin = superio_inb(IT87_SIO_BEEP_PIN_REG) & 0x3f;
1489 } else {
1490 int reg;
1491
1492 superio_select(GPIO);
1493 /* We need at least 4 VID pins */
1494 reg = superio_inb(IT87_SIO_GPIO3_REG);
1495 if (reg & 0x0f) {
1496 pr_info("it87: VID is disabled (pins used for GPIO)\n");
1497 sio_data->skip_vid = 1;
1498 }
1499
1500 /* Check if fan3 is there or not */
1501 if (reg & (1 << 6))
1502 sio_data->skip_pwm |= (1 << 2);
1503 if (reg & (1 << 7))
1504 sio_data->skip_fan |= (1 << 2);
1505
1506 /* Check if fan2 is there or not */
1507 reg = superio_inb(IT87_SIO_GPIO5_REG);
1508 if (reg & (1 << 1))
1509 sio_data->skip_pwm |= (1 << 1);
1510 if (reg & (1 << 2))
1511 sio_data->skip_fan |= (1 << 1);
1512
1513 if ((sio_data->type == it8718 || sio_data->type == it8720)
1514 && !(sio_data->skip_vid))
1515 sio_data->vid_value = superio_inb(IT87_SIO_VID_REG);
1516
1517 reg = superio_inb(IT87_SIO_PINX2_REG);
1518 if (reg & (1 << 0))
1519 pr_info("it87: in3 is VCC (+5V)\n");
1520 if (reg & (1 << 1))
1521 pr_info("it87: in7 is VCCH (+5V Stand-By)\n");
1522
1523 sio_data->beep_pin = superio_inb(IT87_SIO_BEEP_PIN_REG) & 0x3f;
1524 }
1525 if (sio_data->beep_pin)
1526 pr_info("it87: Beeping is supported\n");
1527
1528 /* Disable specific features based on DMI strings */
1529 board_vendor = dmi_get_system_info(DMI_BOARD_VENDOR);
1530 board_name = dmi_get_system_info(DMI_BOARD_NAME);
1531 if (board_vendor && board_name) {
1532 if (strcmp(board_vendor, "nVIDIA") == 0
1533 && strcmp(board_name, "FN68PT") == 0) {
1534 /* On the Shuttle SN68PT, FAN_CTL2 is apparently not
1535 connected to a fan, but to something else. One user
1536 has reported instant system power-off when changing
1537 the PWM2 duty cycle, so we disable it.
1538 I use the board name string as the trigger in case
1539 the same board is ever used in other systems. */
1540 pr_info("it87: Disabling pwm2 due to "
1541 "hardware constraints\n");
1542 sio_data->skip_pwm = (1 << 1);
1543 }
1544 }
1545
1546 exit:
1547 superio_exit();
1548 return err;
1549 }
1550
1551 static void it87_remove_files(struct device *dev)
1552 {
1553 struct it87_data *data = platform_get_drvdata(pdev);
1554 struct it87_sio_data *sio_data = dev->platform_data;
1555 const struct attribute_group *fan_group = it87_get_fan_group(data);
1556 int i;
1557
1558 sysfs_remove_group(&dev->kobj, &it87_group);
1559 if (sio_data->beep_pin)
1560 sysfs_remove_group(&dev->kobj, &it87_group_beep);
1561 for (i = 0; i < 5; i++) {
1562 if (!(data->has_fan & (1 << i)))
1563 continue;
1564 sysfs_remove_group(&dev->kobj, &fan_group[i]);
1565 if (sio_data->beep_pin)
1566 sysfs_remove_file(&dev->kobj,
1567 it87_attributes_fan_beep[i]);
1568 }
1569 for (i = 0; i < 3; i++) {
1570 if (sio_data->skip_pwm & (1 << 0))
1571 continue;
1572 sysfs_remove_group(&dev->kobj, &it87_group_pwm[i]);
1573 if (has_old_autopwm(data))
1574 sysfs_remove_group(&dev->kobj,
1575 &it87_group_autopwm[i]);
1576 }
1577 if (!sio_data->skip_vid)
1578 sysfs_remove_group(&dev->kobj, &it87_group_vid);
1579 }
1580
1581 static int __devinit it87_probe(struct platform_device *pdev)
1582 {
1583 struct it87_data *data;
1584 struct resource *res;
1585 struct device *dev = &pdev->dev;
1586 struct it87_sio_data *sio_data = dev->platform_data;
1587 const struct attribute_group *fan_group;
1588 int err = 0, i;
1589 int enable_pwm_interface;
1590 int fan_beep_need_rw;
1591 static const char *names[] = {
1592 "it87",
1593 "it8712",
1594 "it8716",
1595 "it8718",
1596 "it8720",
1597 };
1598
1599 res = platform_get_resource(pdev, IORESOURCE_IO, 0);
1600 if (!request_region(res->start, IT87_EC_EXTENT, DRVNAME)) {
1601 dev_err(dev, "Failed to request region 0x%lx-0x%lx\n",
1602 (unsigned long)res->start,
1603 (unsigned long)(res->start + IT87_EC_EXTENT - 1));
1604 err = -EBUSY;
1605 goto ERROR0;
1606 }
1607
1608 data = kzalloc(sizeof(struct it87_data), GFP_KERNEL);
1609 if (!data) {
1610 err = -ENOMEM;
1611 goto ERROR1;
1612 }
1613
1614 data->addr = res->start;
1615 data->type = sio_data->type;
1616 data->revision = sio_data->revision;
1617 data->name = names[sio_data->type];
1618
1619 /* Now, we do the remaining detection. */
1620 if ((it87_read_value(data, IT87_REG_CONFIG) & 0x80)
1621 || it87_read_value(data, IT87_REG_CHIPID) != 0x90) {
1622 err = -ENODEV;
1623 goto ERROR2;
1624 }
1625
1626 platform_set_drvdata(pdev, data);
1627
1628 mutex_init(&data->update_lock);
1629
1630 /* Check PWM configuration */
1631 enable_pwm_interface = it87_check_pwm(dev);
1632
1633 /* Initialize the IT87 chip */
1634 it87_init_device(pdev);
1635
1636 /* Register sysfs hooks */
1637 err = sysfs_create_group(&dev->kobj, &it87_group);
1638 if (err)
1639 goto ERROR2;
1640
1641 if (sio_data->beep_pin) {
1642 err = sysfs_create_group(&dev->kobj, &it87_group_beep);
1643 if (err)
1644 goto ERROR4;
1645 }
1646
1647 /* Do not create fan files for disabled fans */
1648 fan_group = it87_get_fan_group(data);
1649 fan_beep_need_rw = 1;
1650 for (i = 0; i < 5; i++) {
1651 if (!(data->has_fan & (1 << i)))
1652 continue;
1653 err = sysfs_create_group(&dev->kobj, &fan_group[i]);
1654 if (err)
1655 goto ERROR4;
1656
1657 if (sio_data->beep_pin) {
1658 err = sysfs_create_file(&dev->kobj,
1659 it87_attributes_fan_beep[i]);
1660 if (err)
1661 goto ERROR4;
1662 if (!fan_beep_need_rw)
1663 continue;
1664
1665 /* As we have a single beep enable bit for all fans,
1666 * only the first enabled fan has a writable attribute
1667 * for it. */
1668 if (sysfs_chmod_file(&dev->kobj,
1669 it87_attributes_fan_beep[i],
1670 S_IRUGO | S_IWUSR))
1671 dev_dbg(dev, "chmod +w fan%d_beep failed\n",
1672 i + 1);
1673 fan_beep_need_rw = 0;
1674 }
1675 }
1676
1677 if (enable_pwm_interface) {
1678 for (i = 0; i < 3; i++) {
1679 if (sio_data->skip_pwm & (1 << i))
1680 continue;
1681 err = sysfs_create_group(&dev->kobj,
1682 &it87_group_pwm[i]);
1683 if (err)
1684 goto ERROR4;
1685
1686 if (!has_old_autopwm(data))
1687 continue;
1688 err = sysfs_create_group(&dev->kobj,
1689 &it87_group_autopwm[i]);
1690 if (err)
1691 goto ERROR4;
1692 }
1693 }
1694
1695 if (!sio_data->skip_vid) {
1696 data->vrm = vid_which_vrm();
1697 /* VID reading from Super-I/O config space if available */
1698 data->vid = sio_data->vid_value;
1699 err = sysfs_create_group(&dev->kobj, &it87_group_vid);
1700 if (err)
1701 goto ERROR4;
1702 }
1703
1704 data->hwmon_dev = hwmon_device_register(dev);
1705 if (IS_ERR(data->hwmon_dev)) {
1706 err = PTR_ERR(data->hwmon_dev);
1707 goto ERROR4;
1708 }
1709
1710 return 0;
1711
1712 ERROR4:
1713 it87_remove_files(dev);
1714 ERROR2:
1715 platform_set_drvdata(pdev, NULL);
1716 kfree(data);
1717 ERROR1:
1718 release_region(res->start, IT87_EC_EXTENT);
1719 ERROR0:
1720 return err;
1721 }
1722
1723 static int __devexit it87_remove(struct platform_device *pdev)
1724 {
1725 struct it87_data *data = platform_get_drvdata(pdev);
1726
1727 hwmon_device_unregister(data->hwmon_dev);
1728 it87_remove_files(&pdev->dev);
1729
1730 release_region(data->addr, IT87_EC_EXTENT);
1731 platform_set_drvdata(pdev, NULL);
1732 kfree(data);
1733
1734 return 0;
1735 }
1736
1737 /* Must be called with data->update_lock held, except during initialization.
1738 We ignore the IT87 BUSY flag at this moment - it could lead to deadlocks,
1739 would slow down the IT87 access and should not be necessary. */
1740 static int it87_read_value(struct it87_data *data, u8 reg)
1741 {
1742 outb_p(reg, data->addr + IT87_ADDR_REG_OFFSET);
1743 return inb_p(data->addr + IT87_DATA_REG_OFFSET);
1744 }
1745
1746 /* Must be called with data->update_lock held, except during initialization.
1747 We ignore the IT87 BUSY flag at this moment - it could lead to deadlocks,
1748 would slow down the IT87 access and should not be necessary. */
1749 static void it87_write_value(struct it87_data *data, u8 reg, u8 value)
1750 {
1751 outb_p(reg, data->addr + IT87_ADDR_REG_OFFSET);
1752 outb_p(value, data->addr + IT87_DATA_REG_OFFSET);
1753 }
1754
1755 /* Return 1 if and only if the PWM interface is safe to use */
1756 static int __devinit it87_check_pwm(struct device *dev)
1757 {
1758 struct it87_data *data = dev_get_drvdata(dev);
1759 /* Some BIOSes fail to correctly configure the IT87 fans. All fans off
1760 * and polarity set to active low is sign that this is the case so we
1761 * disable pwm control to protect the user. */
1762 int tmp = it87_read_value(data, IT87_REG_FAN_CTL);
1763 if ((tmp & 0x87) == 0) {
1764 if (fix_pwm_polarity) {
1765 /* The user asks us to attempt a chip reconfiguration.
1766 * This means switching to active high polarity and
1767 * inverting all fan speed values. */
1768 int i;
1769 u8 pwm[3];
1770
1771 for (i = 0; i < 3; i++)
1772 pwm[i] = it87_read_value(data,
1773 IT87_REG_PWM(i));
1774
1775 /* If any fan is in automatic pwm mode, the polarity
1776 * might be correct, as suspicious as it seems, so we
1777 * better don't change anything (but still disable the
1778 * PWM interface). */
1779 if (!((pwm[0] | pwm[1] | pwm[2]) & 0x80)) {
1780 dev_info(dev, "Reconfiguring PWM to "
1781 "active high polarity\n");
1782 it87_write_value(data, IT87_REG_FAN_CTL,
1783 tmp | 0x87);
1784 for (i = 0; i < 3; i++)
1785 it87_write_value(data,
1786 IT87_REG_PWM(i),
1787 0x7f & ~pwm[i]);
1788 return 1;
1789 }
1790
1791 dev_info(dev, "PWM configuration is "
1792 "too broken to be fixed\n");
1793 }
1794
1795 dev_info(dev, "Detected broken BIOS "
1796 "defaults, disabling PWM interface\n");
1797 return 0;
1798 } else if (fix_pwm_polarity) {
1799 dev_info(dev, "PWM configuration looks "
1800 "sane, won't touch\n");
1801 }
1802
1803 return 1;
1804 }
1805
1806 /* Called when we have found a new IT87. */
1807 static void __devinit it87_init_device(struct platform_device *pdev)
1808 {
1809 struct it87_sio_data *sio_data = pdev->dev.platform_data;
1810 struct it87_data *data = platform_get_drvdata(pdev);
1811 int tmp, i;
1812 u8 mask;
1813
1814 /* For each PWM channel:
1815 * - If it is in automatic mode, setting to manual mode should set
1816 * the fan to full speed by default.
1817 * - If it is in manual mode, we need a mapping to temperature
1818 * channels to use when later setting to automatic mode later.
1819 * Use a 1:1 mapping by default (we are clueless.)
1820 * In both cases, the value can (and should) be changed by the user
1821 * prior to switching to a different mode. */
1822 for (i = 0; i < 3; i++) {
1823 data->pwm_temp_map[i] = i;
1824 data->pwm_duty[i] = 0x7f; /* Full speed */
1825 data->auto_pwm[i][3] = 0x7f; /* Full speed, hard-coded */
1826 }
1827
1828 /* Some chips seem to have default value 0xff for all limit
1829 * registers. For low voltage limits it makes no sense and triggers
1830 * alarms, so change to 0 instead. For high temperature limits, it
1831 * means -1 degree C, which surprisingly doesn't trigger an alarm,
1832 * but is still confusing, so change to 127 degrees C. */
1833 for (i = 0; i < 8; i++) {
1834 tmp = it87_read_value(data, IT87_REG_VIN_MIN(i));
1835 if (tmp == 0xff)
1836 it87_write_value(data, IT87_REG_VIN_MIN(i), 0);
1837 }
1838 for (i = 0; i < 3; i++) {
1839 tmp = it87_read_value(data, IT87_REG_TEMP_HIGH(i));
1840 if (tmp == 0xff)
1841 it87_write_value(data, IT87_REG_TEMP_HIGH(i), 127);
1842 }
1843
1844 /* Check if temperature channels are reset manually or by some reason */
1845 tmp = it87_read_value(data, IT87_REG_TEMP_ENABLE);
1846 if ((tmp & 0x3f) == 0) {
1847 /* Temp1,Temp3=thermistor; Temp2=thermal diode */
1848 tmp = (tmp & 0xc0) | 0x2a;
1849 it87_write_value(data, IT87_REG_TEMP_ENABLE, tmp);
1850 }
1851 data->sensor = tmp;
1852
1853 /* Check if voltage monitors are reset manually or by some reason */
1854 tmp = it87_read_value(data, IT87_REG_VIN_ENABLE);
1855 if ((tmp & 0xff) == 0) {
1856 /* Enable all voltage monitors */
1857 it87_write_value(data, IT87_REG_VIN_ENABLE, 0xff);
1858 }
1859
1860 /* Check if tachometers are reset manually or by some reason */
1861 mask = 0x70 & ~(sio_data->skip_fan << 4);
1862 data->fan_main_ctrl = it87_read_value(data, IT87_REG_FAN_MAIN_CTRL);
1863 if ((data->fan_main_ctrl & mask) == 0) {
1864 /* Enable all fan tachometers */
1865 data->fan_main_ctrl |= mask;
1866 it87_write_value(data, IT87_REG_FAN_MAIN_CTRL,
1867 data->fan_main_ctrl);
1868 }
1869 data->has_fan = (data->fan_main_ctrl >> 4) & 0x07;
1870
1871 /* Set tachometers to 16-bit mode if needed */
1872 if (has_16bit_fans(data)) {
1873 tmp = it87_read_value(data, IT87_REG_FAN_16BIT);
1874 if (~tmp & 0x07 & data->has_fan) {
1875 dev_dbg(&pdev->dev,
1876 "Setting fan1-3 to 16-bit mode\n");
1877 it87_write_value(data, IT87_REG_FAN_16BIT,
1878 tmp | 0x07);
1879 }
1880 /* IT8705F only supports three fans. */
1881 if (data->type != it87) {
1882 if (tmp & (1 << 4))
1883 data->has_fan |= (1 << 3); /* fan4 enabled */
1884 if (tmp & (1 << 5))
1885 data->has_fan |= (1 << 4); /* fan5 enabled */
1886 }
1887 }
1888
1889 /* Fan input pins may be used for alternative functions */
1890 data->has_fan &= ~sio_data->skip_fan;
1891
1892 /* Start monitoring */
1893 it87_write_value(data, IT87_REG_CONFIG,
1894 (it87_read_value(data, IT87_REG_CONFIG) & 0x36)
1895 | (update_vbat ? 0x41 : 0x01));
1896 }
1897
1898 static void it87_update_pwm_ctrl(struct it87_data *data, int nr)
1899 {
1900 data->pwm_ctrl[nr] = it87_read_value(data, IT87_REG_PWM(nr));
1901 if (data->pwm_ctrl[nr] & 0x80) /* Automatic mode */
1902 data->pwm_temp_map[nr] = data->pwm_ctrl[nr] & 0x03;
1903 else /* Manual mode */
1904 data->pwm_duty[nr] = data->pwm_ctrl[nr] & 0x7f;
1905
1906 if (has_old_autopwm(data)) {
1907 int i;
1908
1909 for (i = 0; i < 5 ; i++)
1910 data->auto_temp[nr][i] = it87_read_value(data,
1911 IT87_REG_AUTO_TEMP(nr, i));
1912 for (i = 0; i < 3 ; i++)
1913 data->auto_pwm[nr][i] = it87_read_value(data,
1914 IT87_REG_AUTO_PWM(nr, i));
1915 }
1916 }
1917
1918 static struct it87_data *it87_update_device(struct device *dev)
1919 {
1920 struct it87_data *data = dev_get_drvdata(dev);
1921 int i;
1922
1923 mutex_lock(&data->update_lock);
1924
1925 if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
1926 || !data->valid) {
1927 if (update_vbat) {
1928 /* Cleared after each update, so reenable. Value
1929 returned by this read will be previous value */
1930 it87_write_value(data, IT87_REG_CONFIG,
1931 it87_read_value(data, IT87_REG_CONFIG) | 0x40);
1932 }
1933 for (i = 0; i <= 7; i++) {
1934 data->in[i] =
1935 it87_read_value(data, IT87_REG_VIN(i));
1936 data->in_min[i] =
1937 it87_read_value(data, IT87_REG_VIN_MIN(i));
1938 data->in_max[i] =
1939 it87_read_value(data, IT87_REG_VIN_MAX(i));
1940 }
1941 /* in8 (battery) has no limit registers */
1942 data->in[8] = it87_read_value(data, IT87_REG_VIN(8));
1943
1944 for (i = 0; i < 5; i++) {
1945 /* Skip disabled fans */
1946 if (!(data->has_fan & (1 << i)))
1947 continue;
1948
1949 data->fan_min[i] =
1950 it87_read_value(data, IT87_REG_FAN_MIN[i]);
1951 data->fan[i] = it87_read_value(data,
1952 IT87_REG_FAN[i]);
1953 /* Add high byte if in 16-bit mode */
1954 if (has_16bit_fans(data)) {
1955 data->fan[i] |= it87_read_value(data,
1956 IT87_REG_FANX[i]) << 8;
1957 data->fan_min[i] |= it87_read_value(data,
1958 IT87_REG_FANX_MIN[i]) << 8;
1959 }
1960 }
1961 for (i = 0; i < 3; i++) {
1962 data->temp[i] =
1963 it87_read_value(data, IT87_REG_TEMP(i));
1964 data->temp_high[i] =
1965 it87_read_value(data, IT87_REG_TEMP_HIGH(i));
1966 data->temp_low[i] =
1967 it87_read_value(data, IT87_REG_TEMP_LOW(i));
1968 }
1969
1970 /* Newer chips don't have clock dividers */
1971 if ((data->has_fan & 0x07) && !has_16bit_fans(data)) {
1972 i = it87_read_value(data, IT87_REG_FAN_DIV);
1973 data->fan_div[0] = i & 0x07;
1974 data->fan_div[1] = (i >> 3) & 0x07;
1975 data->fan_div[2] = (i & 0x40) ? 3 : 1;
1976 }
1977
1978 data->alarms =
1979 it87_read_value(data, IT87_REG_ALARM1) |
1980 (it87_read_value(data, IT87_REG_ALARM2) << 8) |
1981 (it87_read_value(data, IT87_REG_ALARM3) << 16);
1982 data->beeps = it87_read_value(data, IT87_REG_BEEP_ENABLE);
1983
1984 data->fan_main_ctrl = it87_read_value(data,
1985 IT87_REG_FAN_MAIN_CTRL);
1986 data->fan_ctl = it87_read_value(data, IT87_REG_FAN_CTL);
1987 for (i = 0; i < 3; i++)
1988 it87_update_pwm_ctrl(data, i);
1989
1990 data->sensor = it87_read_value(data, IT87_REG_TEMP_ENABLE);
1991 /* The 8705 does not have VID capability.
1992 The 8718 and the 8720 don't use IT87_REG_VID for the
1993 same purpose. */
1994 if (data->type == it8712 || data->type == it8716) {
1995 data->vid = it87_read_value(data, IT87_REG_VID);
1996 /* The older IT8712F revisions had only 5 VID pins,
1997 but we assume it is always safe to read 6 bits. */
1998 data->vid &= 0x3f;
1999 }
2000 data->last_updated = jiffies;
2001 data->valid = 1;
2002 }
2003
2004 mutex_unlock(&data->update_lock);
2005
2006 return data;
2007 }
2008
2009 static int __init it87_device_add(unsigned short address,
2010 const struct it87_sio_data *sio_data)
2011 {
2012 struct resource res = {
2013 .start = address + IT87_EC_OFFSET,
2014 .end = address + IT87_EC_OFFSET + IT87_EC_EXTENT - 1,
2015 .name = DRVNAME,
2016 .flags = IORESOURCE_IO,
2017 };
2018 int err;
2019
2020 err = acpi_check_resource_conflict(&res);
2021 if (err)
2022 goto exit;
2023
2024 pdev = platform_device_alloc(DRVNAME, address);
2025 if (!pdev) {
2026 err = -ENOMEM;
2027 printk(KERN_ERR DRVNAME ": Device allocation failed\n");
2028 goto exit;
2029 }
2030
2031 err = platform_device_add_resources(pdev, &res, 1);
2032 if (err) {
2033 printk(KERN_ERR DRVNAME ": Device resource addition failed "
2034 "(%d)\n", err);
2035 goto exit_device_put;
2036 }
2037
2038 err = platform_device_add_data(pdev, sio_data,
2039 sizeof(struct it87_sio_data));
2040 if (err) {
2041 printk(KERN_ERR DRVNAME ": Platform data allocation failed\n");
2042 goto exit_device_put;
2043 }
2044
2045 err = platform_device_add(pdev);
2046 if (err) {
2047 printk(KERN_ERR DRVNAME ": Device addition failed (%d)\n",
2048 err);
2049 goto exit_device_put;
2050 }
2051
2052 return 0;
2053
2054 exit_device_put:
2055 platform_device_put(pdev);
2056 exit:
2057 return err;
2058 }
2059
2060 static int __init sm_it87_init(void)
2061 {
2062 int err;
2063 unsigned short isa_address = 0;
2064 struct it87_sio_data sio_data;
2065
2066 memset(&sio_data, 0, sizeof(struct it87_sio_data));
2067 err = it87_find(&isa_address, &sio_data);
2068 if (err)
2069 return err;
2070 err = platform_driver_register(&it87_driver);
2071 if (err)
2072 return err;
2073
2074 err = it87_device_add(isa_address, &sio_data);
2075 if (err) {
2076 platform_driver_unregister(&it87_driver);
2077 return err;
2078 }
2079
2080 return 0;
2081 }
2082
2083 static void __exit sm_it87_exit(void)
2084 {
2085 platform_device_unregister(pdev);
2086 platform_driver_unregister(&it87_driver);
2087 }
2088
2089
2090 MODULE_AUTHOR("Chris Gauthron, "
2091 "Jean Delvare <khali@linux-fr.org>");
2092 MODULE_DESCRIPTION("IT8705F/8712F/8716F/8718F/8720F/8726F, SiS950 driver");
2093 module_param(update_vbat, bool, 0);
2094 MODULE_PARM_DESC(update_vbat, "Update vbat if set else return powerup value");
2095 module_param(fix_pwm_polarity, bool, 0);
2096 MODULE_PARM_DESC(fix_pwm_polarity,
2097 "Force PWM polarity to active high (DANGEROUS)");
2098 MODULE_LICENSE("GPL");
2099
2100 module_init(sm_it87_init);
2101 module_exit(sm_it87_exit);