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Staging: strip: delete the driver
[linux/fpc-iii.git] / drivers / hwmon / it87.c
blob5be09c048c5f35bc8b19914b58a20e3b4c3e32d5
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 u8 reg;
543
544 if (strict_strtol(buf, 10, &val) < 0)
545 return -EINVAL;
546
547 reg = it87_read_value(data, IT87_REG_TEMP_ENABLE);
548 reg &= ~(1 << nr);
549 reg &= ~(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 reg |= 1 << nr;
558 else if (val == 4)
559 reg |= 8 << nr;
560 else if (val != 0)
561 return -EINVAL;
562
563 mutex_lock(&data->update_lock);
564 data->sensor = reg;
565 it87_write_value(data, IT87_REG_TEMP_ENABLE, data->sensor);
566 data->valid = 0; /* Force cache refresh */
567 mutex_unlock(&data->update_lock);
568 return count;
569 }
570 #define show_sensor_offset(offset) \
571 static SENSOR_DEVICE_ATTR(temp##offset##_type, S_IRUGO | S_IWUSR, \
572 show_sensor, set_sensor, offset - 1);
573
574 show_sensor_offset(1);
575 show_sensor_offset(2);
576 show_sensor_offset(3);
577
578 /* 3 Fans */
579
580 static int pwm_mode(const struct it87_data *data, int nr)
581 {
582 int ctrl = data->fan_main_ctrl & (1 << nr);
583
584 if (ctrl == 0) /* Full speed */
585 return 0;
586 if (data->pwm_ctrl[nr] & 0x80) /* Automatic mode */
587 return 2;
588 else /* Manual mode */
589 return 1;
590 }
591
592 static ssize_t show_fan(struct device *dev, struct device_attribute *attr,
593 char *buf)
594 {
595 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
596 int nr = sensor_attr->index;
597
598 struct it87_data *data = it87_update_device(dev);
599 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[nr],
600 DIV_FROM_REG(data->fan_div[nr])));
601 }
602 static ssize_t show_fan_min(struct device *dev, struct device_attribute *attr,
603 char *buf)
604 {
605 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
606 int nr = sensor_attr->index;
607
608 struct it87_data *data = it87_update_device(dev);
609 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[nr],
610 DIV_FROM_REG(data->fan_div[nr])));
611 }
612 static ssize_t show_fan_div(struct device *dev, struct device_attribute *attr,
613 char *buf)
614 {
615 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
616 int nr = sensor_attr->index;
617
618 struct it87_data *data = it87_update_device(dev);
619 return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr]));
620 }
621 static ssize_t show_pwm_enable(struct device *dev,
622 struct device_attribute *attr, char *buf)
623 {
624 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
625 int nr = sensor_attr->index;
626
627 struct it87_data *data = it87_update_device(dev);
628 return sprintf(buf, "%d\n", pwm_mode(data, nr));
629 }
630 static ssize_t show_pwm(struct device *dev, struct device_attribute *attr,
631 char *buf)
632 {
633 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
634 int nr = sensor_attr->index;
635
636 struct it87_data *data = it87_update_device(dev);
637 return sprintf(buf, "%d\n", PWM_FROM_REG(data->pwm_duty[nr]));
638 }
639 static ssize_t show_pwm_freq(struct device *dev, struct device_attribute *attr,
640 char *buf)
641 {
642 struct it87_data *data = it87_update_device(dev);
643 int index = (data->fan_ctl >> 4) & 0x07;
644
645 return sprintf(buf, "%u\n", pwm_freq[index]);
646 }
647 static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr,
648 const char *buf, size_t count)
649 {
650 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
651 int nr = sensor_attr->index;
652
653 struct it87_data *data = dev_get_drvdata(dev);
654 long val;
655 u8 reg;
656
657 if (strict_strtol(buf, 10, &val) < 0)
658 return -EINVAL;
659
660 mutex_lock(&data->update_lock);
661 reg = it87_read_value(data, IT87_REG_FAN_DIV);
662 switch (nr) {
663 case 0:
664 data->fan_div[nr] = reg & 0x07;
665 break;
666 case 1:
667 data->fan_div[nr] = (reg >> 3) & 0x07;
668 break;
669 case 2:
670 data->fan_div[nr] = (reg & 0x40) ? 3 : 1;
671 break;
672 }
673
674 data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr]));
675 it87_write_value(data, IT87_REG_FAN_MIN[nr], data->fan_min[nr]);
676 mutex_unlock(&data->update_lock);
677 return count;
678 }
679 static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr,
680 const char *buf, size_t count)
681 {
682 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
683 int nr = sensor_attr->index;
684
685 struct it87_data *data = dev_get_drvdata(dev);
686 unsigned long val;
687 int min;
688 u8 old;
689
690 if (strict_strtoul(buf, 10, &val) < 0)
691 return -EINVAL;
692
693 mutex_lock(&data->update_lock);
694 old = it87_read_value(data, IT87_REG_FAN_DIV);
695
696 /* Save fan min limit */
697 min = FAN_FROM_REG(data->fan_min[nr], DIV_FROM_REG(data->fan_div[nr]));
698
699 switch (nr) {
700 case 0:
701 case 1:
702 data->fan_div[nr] = DIV_TO_REG(val);
703 break;
704 case 2:
705 if (val < 8)
706 data->fan_div[nr] = 1;
707 else
708 data->fan_div[nr] = 3;
709 }
710 val = old & 0x80;
711 val |= (data->fan_div[0] & 0x07);
712 val |= (data->fan_div[1] & 0x07) << 3;
713 if (data->fan_div[2] == 3)
714 val |= 0x1 << 6;
715 it87_write_value(data, IT87_REG_FAN_DIV, val);
716
717 /* Restore fan min limit */
718 data->fan_min[nr] = FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr]));
719 it87_write_value(data, IT87_REG_FAN_MIN[nr], data->fan_min[nr]);
720
721 mutex_unlock(&data->update_lock);
722 return count;
723 }
724
725 /* Returns 0 if OK, -EINVAL otherwise */
726 static int check_trip_points(struct device *dev, int nr)
727 {
728 const struct it87_data *data = dev_get_drvdata(dev);
729 int i, err = 0;
730
731 if (has_old_autopwm(data)) {
732 for (i = 0; i < 3; i++) {
733 if (data->auto_temp[nr][i] > data->auto_temp[nr][i + 1])
734 err = -EINVAL;
735 }
736 for (i = 0; i < 2; i++) {
737 if (data->auto_pwm[nr][i] > data->auto_pwm[nr][i + 1])
738 err = -EINVAL;
739 }
740 }
741
742 if (err) {
743 dev_err(dev, "Inconsistent trip points, not switching to "
744 "automatic mode\n");
745 dev_err(dev, "Adjust the trip points and try again\n");
746 }
747 return err;
748 }
749
750 static ssize_t set_pwm_enable(struct device *dev,
751 struct device_attribute *attr, const char *buf, size_t count)
752 {
753 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
754 int nr = sensor_attr->index;
755
756 struct it87_data *data = dev_get_drvdata(dev);
757 long val;
758
759 if (strict_strtol(buf, 10, &val) < 0 || val < 0 || val > 2)
760 return -EINVAL;
761
762 /* Check trip points before switching to automatic mode */
763 if (val == 2) {
764 if (check_trip_points(dev, nr) < 0)
765 return -EINVAL;
766 }
767
768 mutex_lock(&data->update_lock);
769
770 if (val == 0) {
771 int tmp;
772 /* make sure the fan is on when in on/off mode */
773 tmp = it87_read_value(data, IT87_REG_FAN_CTL);
774 it87_write_value(data, IT87_REG_FAN_CTL, tmp | (1 << nr));
775 /* set on/off mode */
776 data->fan_main_ctrl &= ~(1 << nr);
777 it87_write_value(data, IT87_REG_FAN_MAIN_CTRL,
778 data->fan_main_ctrl);
779 } else {
780 if (val == 1) /* Manual mode */
781 data->pwm_ctrl[nr] = data->pwm_duty[nr];
782 else /* Automatic mode */
783 data->pwm_ctrl[nr] = 0x80 | data->pwm_temp_map[nr];
784 it87_write_value(data, IT87_REG_PWM(nr), data->pwm_ctrl[nr]);
785 /* set SmartGuardian mode */
786 data->fan_main_ctrl |= (1 << nr);
787 it87_write_value(data, IT87_REG_FAN_MAIN_CTRL,
788 data->fan_main_ctrl);
789 }
790
791 mutex_unlock(&data->update_lock);
792 return count;
793 }
794 static ssize_t set_pwm(struct device *dev, struct device_attribute *attr,
795 const char *buf, size_t count)
796 {
797 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
798 int nr = sensor_attr->index;
799
800 struct it87_data *data = dev_get_drvdata(dev);
801 long val;
802
803 if (strict_strtol(buf, 10, &val) < 0 || val < 0 || val > 255)
804 return -EINVAL;
805
806 mutex_lock(&data->update_lock);
807 data->pwm_duty[nr] = PWM_TO_REG(val);
808 /* If we are in manual mode, write the duty cycle immediately;
809 * otherwise, just store it for later use. */
810 if (!(data->pwm_ctrl[nr] & 0x80)) {
811 data->pwm_ctrl[nr] = data->pwm_duty[nr];
812 it87_write_value(data, IT87_REG_PWM(nr), data->pwm_ctrl[nr]);
813 }
814 mutex_unlock(&data->update_lock);
815 return count;
816 }
817 static ssize_t set_pwm_freq(struct device *dev,
818 struct device_attribute *attr, const char *buf, size_t count)
819 {
820 struct it87_data *data = dev_get_drvdata(dev);
821 unsigned long val;
822 int i;
823
824 if (strict_strtoul(buf, 10, &val) < 0)
825 return -EINVAL;
826
827 /* Search for the nearest available frequency */
828 for (i = 0; i < 7; i++) {
829 if (val > (pwm_freq[i] + pwm_freq[i+1]) / 2)
830 break;
831 }
832
833 mutex_lock(&data->update_lock);
834 data->fan_ctl = it87_read_value(data, IT87_REG_FAN_CTL) & 0x8f;
835 data->fan_ctl |= i << 4;
836 it87_write_value(data, IT87_REG_FAN_CTL, data->fan_ctl);
837 mutex_unlock(&data->update_lock);
838
839 return count;
840 }
841 static ssize_t show_pwm_temp_map(struct device *dev,
842 struct device_attribute *attr, char *buf)
843 {
844 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
845 int nr = sensor_attr->index;
846
847 struct it87_data *data = it87_update_device(dev);
848 int map;
849
850 if (data->pwm_temp_map[nr] < 3)
851 map = 1 << data->pwm_temp_map[nr];
852 else
853 map = 0; /* Should never happen */
854 return sprintf(buf, "%d\n", map);
855 }
856 static ssize_t set_pwm_temp_map(struct device *dev,
857 struct device_attribute *attr, const char *buf, size_t count)
858 {
859 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
860 int nr = sensor_attr->index;
861
862 struct it87_data *data = dev_get_drvdata(dev);
863 long val;
864 u8 reg;
865
866 /* This check can go away if we ever support automatic fan speed
867 control on newer chips. */
868 if (!has_old_autopwm(data)) {
869 dev_notice(dev, "Mapping change disabled for safety reasons\n");
870 return -EINVAL;
871 }
872
873 if (strict_strtol(buf, 10, &val) < 0)
874 return -EINVAL;
875
876 switch (val) {
877 case (1 << 0):
878 reg = 0x00;
879 break;
880 case (1 << 1):
881 reg = 0x01;
882 break;
883 case (1 << 2):
884 reg = 0x02;
885 break;
886 default:
887 return -EINVAL;
888 }
889
890 mutex_lock(&data->update_lock);
891 data->pwm_temp_map[nr] = reg;
892 /* If we are in automatic mode, write the temp mapping immediately;
893 * otherwise, just store it for later use. */
894 if (data->pwm_ctrl[nr] & 0x80) {
895 data->pwm_ctrl[nr] = 0x80 | data->pwm_temp_map[nr];
896 it87_write_value(data, IT87_REG_PWM(nr), data->pwm_ctrl[nr]);
897 }
898 mutex_unlock(&data->update_lock);
899 return count;
900 }
901
902 static ssize_t show_auto_pwm(struct device *dev,
903 struct device_attribute *attr, char *buf)
904 {
905 struct it87_data *data = it87_update_device(dev);
906 struct sensor_device_attribute_2 *sensor_attr =
907 to_sensor_dev_attr_2(attr);
908 int nr = sensor_attr->nr;
909 int point = sensor_attr->index;
910
911 return sprintf(buf, "%d\n", PWM_FROM_REG(data->auto_pwm[nr][point]));
912 }
913
914 static ssize_t set_auto_pwm(struct device *dev,
915 struct device_attribute *attr, const char *buf, size_t count)
916 {
917 struct it87_data *data = dev_get_drvdata(dev);
918 struct sensor_device_attribute_2 *sensor_attr =
919 to_sensor_dev_attr_2(attr);
920 int nr = sensor_attr->nr;
921 int point = sensor_attr->index;
922 long val;
923
924 if (strict_strtol(buf, 10, &val) < 0 || val < 0 || val > 255)
925 return -EINVAL;
926
927 mutex_lock(&data->update_lock);
928 data->auto_pwm[nr][point] = PWM_TO_REG(val);
929 it87_write_value(data, IT87_REG_AUTO_PWM(nr, point),
930 data->auto_pwm[nr][point]);
931 mutex_unlock(&data->update_lock);
932 return count;
933 }
934
935 static ssize_t show_auto_temp(struct device *dev,
936 struct device_attribute *attr, char *buf)
937 {
938 struct it87_data *data = it87_update_device(dev);
939 struct sensor_device_attribute_2 *sensor_attr =
940 to_sensor_dev_attr_2(attr);
941 int nr = sensor_attr->nr;
942 int point = sensor_attr->index;
943
944 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->auto_temp[nr][point]));
945 }
946
947 static ssize_t set_auto_temp(struct device *dev,
948 struct device_attribute *attr, const char *buf, size_t count)
949 {
950 struct it87_data *data = dev_get_drvdata(dev);
951 struct sensor_device_attribute_2 *sensor_attr =
952 to_sensor_dev_attr_2(attr);
953 int nr = sensor_attr->nr;
954 int point = sensor_attr->index;
955 long val;
956
957 if (strict_strtol(buf, 10, &val) < 0 || val < -128000 || val > 127000)
958 return -EINVAL;
959
960 mutex_lock(&data->update_lock);
961 data->auto_temp[nr][point] = TEMP_TO_REG(val);
962 it87_write_value(data, IT87_REG_AUTO_TEMP(nr, point),
963 data->auto_temp[nr][point]);
964 mutex_unlock(&data->update_lock);
965 return count;
966 }
967
968 #define show_fan_offset(offset) \
969 static SENSOR_DEVICE_ATTR(fan##offset##_input, S_IRUGO, \
970 show_fan, NULL, offset - 1); \
971 static SENSOR_DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \
972 show_fan_min, set_fan_min, offset - 1); \
973 static SENSOR_DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR, \
974 show_fan_div, set_fan_div, offset - 1);
975
976 show_fan_offset(1);
977 show_fan_offset(2);
978 show_fan_offset(3);
979
980 #define show_pwm_offset(offset) \
981 static SENSOR_DEVICE_ATTR(pwm##offset##_enable, S_IRUGO | S_IWUSR, \
982 show_pwm_enable, set_pwm_enable, offset - 1); \
983 static SENSOR_DEVICE_ATTR(pwm##offset, S_IRUGO | S_IWUSR, \
984 show_pwm, set_pwm, offset - 1); \
985 static DEVICE_ATTR(pwm##offset##_freq, \
986 (offset == 1 ? S_IRUGO | S_IWUSR : S_IRUGO), \
987 show_pwm_freq, (offset == 1 ? set_pwm_freq : NULL)); \
988 static SENSOR_DEVICE_ATTR(pwm##offset##_auto_channels_temp, \
989 S_IRUGO | S_IWUSR, show_pwm_temp_map, set_pwm_temp_map, \
990 offset - 1); \
991 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point1_pwm, \
992 S_IRUGO | S_IWUSR, show_auto_pwm, set_auto_pwm, \
993 offset - 1, 0); \
994 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point2_pwm, \
995 S_IRUGO | S_IWUSR, show_auto_pwm, set_auto_pwm, \
996 offset - 1, 1); \
997 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point3_pwm, \
998 S_IRUGO | S_IWUSR, show_auto_pwm, set_auto_pwm, \
999 offset - 1, 2); \
1000 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point4_pwm, \
1001 S_IRUGO, show_auto_pwm, NULL, offset - 1, 3); \
1002 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point1_temp, \
1003 S_IRUGO | S_IWUSR, show_auto_temp, set_auto_temp, \
1004 offset - 1, 1); \
1005 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point1_temp_hyst, \
1006 S_IRUGO | S_IWUSR, show_auto_temp, set_auto_temp, \
1007 offset - 1, 0); \
1008 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point2_temp, \
1009 S_IRUGO | S_IWUSR, show_auto_temp, set_auto_temp, \
1010 offset - 1, 2); \
1011 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point3_temp, \
1012 S_IRUGO | S_IWUSR, show_auto_temp, set_auto_temp, \
1013 offset - 1, 3); \
1014 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point4_temp, \
1015 S_IRUGO | S_IWUSR, show_auto_temp, set_auto_temp, \
1016 offset - 1, 4);
1017
1018 show_pwm_offset(1);
1019 show_pwm_offset(2);
1020 show_pwm_offset(3);
1021
1022 /* A different set of callbacks for 16-bit fans */
1023 static ssize_t show_fan16(struct device *dev, struct device_attribute *attr,
1024 char *buf)
1025 {
1026 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
1027 int nr = sensor_attr->index;
1028 struct it87_data *data = it87_update_device(dev);
1029 return sprintf(buf, "%d\n", FAN16_FROM_REG(data->fan[nr]));
1030 }
1031
1032 static ssize_t show_fan16_min(struct device *dev, struct device_attribute *attr,
1033 char *buf)
1034 {
1035 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
1036 int nr = sensor_attr->index;
1037 struct it87_data *data = it87_update_device(dev);
1038 return sprintf(buf, "%d\n", FAN16_FROM_REG(data->fan_min[nr]));
1039 }
1040
1041 static ssize_t set_fan16_min(struct device *dev, struct device_attribute *attr,
1042 const char *buf, size_t count)
1043 {
1044 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
1045 int nr = sensor_attr->index;
1046 struct it87_data *data = dev_get_drvdata(dev);
1047 long val;
1048
1049 if (strict_strtol(buf, 10, &val) < 0)
1050 return -EINVAL;
1051
1052 mutex_lock(&data->update_lock);
1053 data->fan_min[nr] = FAN16_TO_REG(val);
1054 it87_write_value(data, IT87_REG_FAN_MIN[nr],
1055 data->fan_min[nr] & 0xff);
1056 it87_write_value(data, IT87_REG_FANX_MIN[nr],
1057 data->fan_min[nr] >> 8);
1058 mutex_unlock(&data->update_lock);
1059 return count;
1060 }
1061
1062 /* We want to use the same sysfs file names as 8-bit fans, but we need
1063 different variable names, so we have to use SENSOR_ATTR instead of
1064 SENSOR_DEVICE_ATTR. */
1065 #define show_fan16_offset(offset) \
1066 static struct sensor_device_attribute sensor_dev_attr_fan##offset##_input16 \
1067 = SENSOR_ATTR(fan##offset##_input, S_IRUGO, \
1068 show_fan16, NULL, offset - 1); \
1069 static struct sensor_device_attribute sensor_dev_attr_fan##offset##_min16 \
1070 = SENSOR_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \
1071 show_fan16_min, set_fan16_min, offset - 1)
1072
1073 show_fan16_offset(1);
1074 show_fan16_offset(2);
1075 show_fan16_offset(3);
1076 show_fan16_offset(4);
1077 show_fan16_offset(5);
1078
1079 /* Alarms */
1080 static ssize_t show_alarms(struct device *dev, struct device_attribute *attr,
1081 char *buf)
1082 {
1083 struct it87_data *data = it87_update_device(dev);
1084 return sprintf(buf, "%u\n", data->alarms);
1085 }
1086 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
1087
1088 static ssize_t show_alarm(struct device *dev, struct device_attribute *attr,
1089 char *buf)
1090 {
1091 int bitnr = to_sensor_dev_attr(attr)->index;
1092 struct it87_data *data = it87_update_device(dev);
1093 return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1);
1094 }
1095 static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 8);
1096 static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 9);
1097 static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 10);
1098 static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 11);
1099 static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 12);
1100 static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 13);
1101 static SENSOR_DEVICE_ATTR(in6_alarm, S_IRUGO, show_alarm, NULL, 14);
1102 static SENSOR_DEVICE_ATTR(in7_alarm, S_IRUGO, show_alarm, NULL, 15);
1103 static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 0);
1104 static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 1);
1105 static SENSOR_DEVICE_ATTR(fan3_alarm, S_IRUGO, show_alarm, NULL, 2);
1106 static SENSOR_DEVICE_ATTR(fan4_alarm, S_IRUGO, show_alarm, NULL, 3);
1107 static SENSOR_DEVICE_ATTR(fan5_alarm, S_IRUGO, show_alarm, NULL, 6);
1108 static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 16);
1109 static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 17);
1110 static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL, 18);
1111
1112 static ssize_t show_beep(struct device *dev, struct device_attribute *attr,
1113 char *buf)
1114 {
1115 int bitnr = to_sensor_dev_attr(attr)->index;
1116 struct it87_data *data = it87_update_device(dev);
1117 return sprintf(buf, "%u\n", (data->beeps >> bitnr) & 1);
1118 }
1119 static ssize_t set_beep(struct device *dev, struct device_attribute *attr,
1120 const char *buf, size_t count)
1121 {
1122 int bitnr = to_sensor_dev_attr(attr)->index;
1123 struct it87_data *data = dev_get_drvdata(dev);
1124 long val;
1125
1126 if (strict_strtol(buf, 10, &val) < 0
1127 || (val != 0 && val != 1))
1128 return -EINVAL;
1129
1130 mutex_lock(&data->update_lock);
1131 data->beeps = it87_read_value(data, IT87_REG_BEEP_ENABLE);
1132 if (val)
1133 data->beeps |= (1 << bitnr);
1134 else
1135 data->beeps &= ~(1 << bitnr);
1136 it87_write_value(data, IT87_REG_BEEP_ENABLE, data->beeps);
1137 mutex_unlock(&data->update_lock);
1138 return count;
1139 }
1140
1141 static SENSOR_DEVICE_ATTR(in0_beep, S_IRUGO | S_IWUSR,
1142 show_beep, set_beep, 1);
1143 static SENSOR_DEVICE_ATTR(in1_beep, S_IRUGO, show_beep, NULL, 1);
1144 static SENSOR_DEVICE_ATTR(in2_beep, S_IRUGO, show_beep, NULL, 1);
1145 static SENSOR_DEVICE_ATTR(in3_beep, S_IRUGO, show_beep, NULL, 1);
1146 static SENSOR_DEVICE_ATTR(in4_beep, S_IRUGO, show_beep, NULL, 1);
1147 static SENSOR_DEVICE_ATTR(in5_beep, S_IRUGO, show_beep, NULL, 1);
1148 static SENSOR_DEVICE_ATTR(in6_beep, S_IRUGO, show_beep, NULL, 1);
1149 static SENSOR_DEVICE_ATTR(in7_beep, S_IRUGO, show_beep, NULL, 1);
1150 /* fanX_beep writability is set later */
1151 static SENSOR_DEVICE_ATTR(fan1_beep, S_IRUGO, show_beep, set_beep, 0);
1152 static SENSOR_DEVICE_ATTR(fan2_beep, S_IRUGO, show_beep, set_beep, 0);
1153 static SENSOR_DEVICE_ATTR(fan3_beep, S_IRUGO, show_beep, set_beep, 0);
1154 static SENSOR_DEVICE_ATTR(fan4_beep, S_IRUGO, show_beep, set_beep, 0);
1155 static SENSOR_DEVICE_ATTR(fan5_beep, S_IRUGO, show_beep, set_beep, 0);
1156 static SENSOR_DEVICE_ATTR(temp1_beep, S_IRUGO | S_IWUSR,
1157 show_beep, set_beep, 2);
1158 static SENSOR_DEVICE_ATTR(temp2_beep, S_IRUGO, show_beep, NULL, 2);
1159 static SENSOR_DEVICE_ATTR(temp3_beep, S_IRUGO, show_beep, NULL, 2);
1160
1161 static ssize_t show_vrm_reg(struct device *dev, struct device_attribute *attr,
1162 char *buf)
1163 {
1164 struct it87_data *data = dev_get_drvdata(dev);
1165 return sprintf(buf, "%u\n", data->vrm);
1166 }
1167 static ssize_t store_vrm_reg(struct device *dev, struct device_attribute *attr,
1168 const char *buf, size_t count)
1169 {
1170 struct it87_data *data = dev_get_drvdata(dev);
1171 unsigned long val;
1172
1173 if (strict_strtoul(buf, 10, &val) < 0)
1174 return -EINVAL;
1175
1176 data->vrm = val;
1177
1178 return count;
1179 }
1180 static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm_reg, store_vrm_reg);
1181
1182 static ssize_t show_vid_reg(struct device *dev, struct device_attribute *attr,
1183 char *buf)
1184 {
1185 struct it87_data *data = it87_update_device(dev);
1186 return sprintf(buf, "%ld\n", (long) vid_from_reg(data->vid, data->vrm));
1187 }
1188 static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid_reg, NULL);
1189
1190 static ssize_t show_name(struct device *dev, struct device_attribute
1191 *devattr, char *buf)
1192 {
1193 struct it87_data *data = dev_get_drvdata(dev);
1194 return sprintf(buf, "%s\n", data->name);
1195 }
1196 static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
1197
1198 static struct attribute *it87_attributes[] = {
1199 &sensor_dev_attr_in0_input.dev_attr.attr,
1200 &sensor_dev_attr_in1_input.dev_attr.attr,
1201 &sensor_dev_attr_in2_input.dev_attr.attr,
1202 &sensor_dev_attr_in3_input.dev_attr.attr,
1203 &sensor_dev_attr_in4_input.dev_attr.attr,
1204 &sensor_dev_attr_in5_input.dev_attr.attr,
1205 &sensor_dev_attr_in6_input.dev_attr.attr,
1206 &sensor_dev_attr_in7_input.dev_attr.attr,
1207 &sensor_dev_attr_in8_input.dev_attr.attr,
1208 &sensor_dev_attr_in0_min.dev_attr.attr,
1209 &sensor_dev_attr_in1_min.dev_attr.attr,
1210 &sensor_dev_attr_in2_min.dev_attr.attr,
1211 &sensor_dev_attr_in3_min.dev_attr.attr,
1212 &sensor_dev_attr_in4_min.dev_attr.attr,
1213 &sensor_dev_attr_in5_min.dev_attr.attr,
1214 &sensor_dev_attr_in6_min.dev_attr.attr,
1215 &sensor_dev_attr_in7_min.dev_attr.attr,
1216 &sensor_dev_attr_in0_max.dev_attr.attr,
1217 &sensor_dev_attr_in1_max.dev_attr.attr,
1218 &sensor_dev_attr_in2_max.dev_attr.attr,
1219 &sensor_dev_attr_in3_max.dev_attr.attr,
1220 &sensor_dev_attr_in4_max.dev_attr.attr,
1221 &sensor_dev_attr_in5_max.dev_attr.attr,
1222 &sensor_dev_attr_in6_max.dev_attr.attr,
1223 &sensor_dev_attr_in7_max.dev_attr.attr,
1224 &sensor_dev_attr_in0_alarm.dev_attr.attr,
1225 &sensor_dev_attr_in1_alarm.dev_attr.attr,
1226 &sensor_dev_attr_in2_alarm.dev_attr.attr,
1227 &sensor_dev_attr_in3_alarm.dev_attr.attr,
1228 &sensor_dev_attr_in4_alarm.dev_attr.attr,
1229 &sensor_dev_attr_in5_alarm.dev_attr.attr,
1230 &sensor_dev_attr_in6_alarm.dev_attr.attr,
1231 &sensor_dev_attr_in7_alarm.dev_attr.attr,
1232
1233 &sensor_dev_attr_temp1_input.dev_attr.attr,
1234 &sensor_dev_attr_temp2_input.dev_attr.attr,
1235 &sensor_dev_attr_temp3_input.dev_attr.attr,
1236 &sensor_dev_attr_temp1_max.dev_attr.attr,
1237 &sensor_dev_attr_temp2_max.dev_attr.attr,
1238 &sensor_dev_attr_temp3_max.dev_attr.attr,
1239 &sensor_dev_attr_temp1_min.dev_attr.attr,
1240 &sensor_dev_attr_temp2_min.dev_attr.attr,
1241 &sensor_dev_attr_temp3_min.dev_attr.attr,
1242 &sensor_dev_attr_temp1_type.dev_attr.attr,
1243 &sensor_dev_attr_temp2_type.dev_attr.attr,
1244 &sensor_dev_attr_temp3_type.dev_attr.attr,
1245 &sensor_dev_attr_temp1_alarm.dev_attr.attr,
1246 &sensor_dev_attr_temp2_alarm.dev_attr.attr,
1247 &sensor_dev_attr_temp3_alarm.dev_attr.attr,
1248
1249 &dev_attr_alarms.attr,
1250 &dev_attr_name.attr,
1251 NULL
1252 };
1253
1254 static const struct attribute_group it87_group = {
1255 .attrs = it87_attributes,
1256 };
1257
1258 static struct attribute *it87_attributes_beep[] = {
1259 &sensor_dev_attr_in0_beep.dev_attr.attr,
1260 &sensor_dev_attr_in1_beep.dev_attr.attr,
1261 &sensor_dev_attr_in2_beep.dev_attr.attr,
1262 &sensor_dev_attr_in3_beep.dev_attr.attr,
1263 &sensor_dev_attr_in4_beep.dev_attr.attr,
1264 &sensor_dev_attr_in5_beep.dev_attr.attr,
1265 &sensor_dev_attr_in6_beep.dev_attr.attr,
1266 &sensor_dev_attr_in7_beep.dev_attr.attr,
1267
1268 &sensor_dev_attr_temp1_beep.dev_attr.attr,
1269 &sensor_dev_attr_temp2_beep.dev_attr.attr,
1270 &sensor_dev_attr_temp3_beep.dev_attr.attr,
1271 NULL
1272 };
1273
1274 static const struct attribute_group it87_group_beep = {
1275 .attrs = it87_attributes_beep,
1276 };
1277
1278 static struct attribute *it87_attributes_fan16[5][3+1] = { {
1279 &sensor_dev_attr_fan1_input16.dev_attr.attr,
1280 &sensor_dev_attr_fan1_min16.dev_attr.attr,
1281 &sensor_dev_attr_fan1_alarm.dev_attr.attr,
1282 NULL
1283 }, {
1284 &sensor_dev_attr_fan2_input16.dev_attr.attr,
1285 &sensor_dev_attr_fan2_min16.dev_attr.attr,
1286 &sensor_dev_attr_fan2_alarm.dev_attr.attr,
1287 NULL
1288 }, {
1289 &sensor_dev_attr_fan3_input16.dev_attr.attr,
1290 &sensor_dev_attr_fan3_min16.dev_attr.attr,
1291 &sensor_dev_attr_fan3_alarm.dev_attr.attr,
1292 NULL
1293 }, {
1294 &sensor_dev_attr_fan4_input16.dev_attr.attr,
1295 &sensor_dev_attr_fan4_min16.dev_attr.attr,
1296 &sensor_dev_attr_fan4_alarm.dev_attr.attr,
1297 NULL
1298 }, {
1299 &sensor_dev_attr_fan5_input16.dev_attr.attr,
1300 &sensor_dev_attr_fan5_min16.dev_attr.attr,
1301 &sensor_dev_attr_fan5_alarm.dev_attr.attr,
1302 NULL
1303 } };
1304
1305 static const struct attribute_group it87_group_fan16[5] = {
1306 { .attrs = it87_attributes_fan16[0] },
1307 { .attrs = it87_attributes_fan16[1] },
1308 { .attrs = it87_attributes_fan16[2] },
1309 { .attrs = it87_attributes_fan16[3] },
1310 { .attrs = it87_attributes_fan16[4] },
1311 };
1312
1313 static struct attribute *it87_attributes_fan[3][4+1] = { {
1314 &sensor_dev_attr_fan1_input.dev_attr.attr,
1315 &sensor_dev_attr_fan1_min.dev_attr.attr,
1316 &sensor_dev_attr_fan1_div.dev_attr.attr,
1317 &sensor_dev_attr_fan1_alarm.dev_attr.attr,
1318 NULL
1319 }, {
1320 &sensor_dev_attr_fan2_input.dev_attr.attr,
1321 &sensor_dev_attr_fan2_min.dev_attr.attr,
1322 &sensor_dev_attr_fan2_div.dev_attr.attr,
1323 &sensor_dev_attr_fan2_alarm.dev_attr.attr,
1324 NULL
1325 }, {
1326 &sensor_dev_attr_fan3_input.dev_attr.attr,
1327 &sensor_dev_attr_fan3_min.dev_attr.attr,
1328 &sensor_dev_attr_fan3_div.dev_attr.attr,
1329 &sensor_dev_attr_fan3_alarm.dev_attr.attr,
1330 NULL
1331 } };
1332
1333 static const struct attribute_group it87_group_fan[3] = {
1334 { .attrs = it87_attributes_fan[0] },
1335 { .attrs = it87_attributes_fan[1] },
1336 { .attrs = it87_attributes_fan[2] },
1337 };
1338
1339 static const struct attribute_group *
1340 it87_get_fan_group(const struct it87_data *data)
1341 {
1342 return has_16bit_fans(data) ? it87_group_fan16 : it87_group_fan;
1343 }
1344
1345 static struct attribute *it87_attributes_pwm[3][4+1] = { {
1346 &sensor_dev_attr_pwm1_enable.dev_attr.attr,
1347 &sensor_dev_attr_pwm1.dev_attr.attr,
1348 &dev_attr_pwm1_freq.attr,
1349 &sensor_dev_attr_pwm1_auto_channels_temp.dev_attr.attr,
1350 NULL
1351 }, {
1352 &sensor_dev_attr_pwm2_enable.dev_attr.attr,
1353 &sensor_dev_attr_pwm2.dev_attr.attr,
1354 &dev_attr_pwm2_freq.attr,
1355 &sensor_dev_attr_pwm2_auto_channels_temp.dev_attr.attr,
1356 NULL
1357 }, {
1358 &sensor_dev_attr_pwm3_enable.dev_attr.attr,
1359 &sensor_dev_attr_pwm3.dev_attr.attr,
1360 &dev_attr_pwm3_freq.attr,
1361 &sensor_dev_attr_pwm3_auto_channels_temp.dev_attr.attr,
1362 NULL
1363 } };
1364
1365 static const struct attribute_group it87_group_pwm[3] = {
1366 { .attrs = it87_attributes_pwm[0] },
1367 { .attrs = it87_attributes_pwm[1] },
1368 { .attrs = it87_attributes_pwm[2] },
1369 };
1370
1371 static struct attribute *it87_attributes_autopwm[3][9+1] = { {
1372 &sensor_dev_attr_pwm1_auto_point1_pwm.dev_attr.attr,
1373 &sensor_dev_attr_pwm1_auto_point2_pwm.dev_attr.attr,
1374 &sensor_dev_attr_pwm1_auto_point3_pwm.dev_attr.attr,
1375 &sensor_dev_attr_pwm1_auto_point4_pwm.dev_attr.attr,
1376 &sensor_dev_attr_pwm1_auto_point1_temp.dev_attr.attr,
1377 &sensor_dev_attr_pwm1_auto_point1_temp_hyst.dev_attr.attr,
1378 &sensor_dev_attr_pwm1_auto_point2_temp.dev_attr.attr,
1379 &sensor_dev_attr_pwm1_auto_point3_temp.dev_attr.attr,
1380 &sensor_dev_attr_pwm1_auto_point4_temp.dev_attr.attr,
1381 NULL
1382 }, {
1383 &sensor_dev_attr_pwm2_auto_point1_pwm.dev_attr.attr,
1384 &sensor_dev_attr_pwm2_auto_point2_pwm.dev_attr.attr,
1385 &sensor_dev_attr_pwm2_auto_point3_pwm.dev_attr.attr,
1386 &sensor_dev_attr_pwm2_auto_point4_pwm.dev_attr.attr,
1387 &sensor_dev_attr_pwm2_auto_point1_temp.dev_attr.attr,
1388 &sensor_dev_attr_pwm2_auto_point1_temp_hyst.dev_attr.attr,
1389 &sensor_dev_attr_pwm2_auto_point2_temp.dev_attr.attr,
1390 &sensor_dev_attr_pwm2_auto_point3_temp.dev_attr.attr,
1391 &sensor_dev_attr_pwm2_auto_point4_temp.dev_attr.attr,
1392 NULL
1393 }, {
1394 &sensor_dev_attr_pwm3_auto_point1_pwm.dev_attr.attr,
1395 &sensor_dev_attr_pwm3_auto_point2_pwm.dev_attr.attr,
1396 &sensor_dev_attr_pwm3_auto_point3_pwm.dev_attr.attr,
1397 &sensor_dev_attr_pwm3_auto_point4_pwm.dev_attr.attr,
1398 &sensor_dev_attr_pwm3_auto_point1_temp.dev_attr.attr,
1399 &sensor_dev_attr_pwm3_auto_point1_temp_hyst.dev_attr.attr,
1400 &sensor_dev_attr_pwm3_auto_point2_temp.dev_attr.attr,
1401 &sensor_dev_attr_pwm3_auto_point3_temp.dev_attr.attr,
1402 &sensor_dev_attr_pwm3_auto_point4_temp.dev_attr.attr,
1403 NULL
1404 } };
1405
1406 static const struct attribute_group it87_group_autopwm[3] = {
1407 { .attrs = it87_attributes_autopwm[0] },
1408 { .attrs = it87_attributes_autopwm[1] },
1409 { .attrs = it87_attributes_autopwm[2] },
1410 };
1411
1412 static struct attribute *it87_attributes_fan_beep[] = {
1413 &sensor_dev_attr_fan1_beep.dev_attr.attr,
1414 &sensor_dev_attr_fan2_beep.dev_attr.attr,
1415 &sensor_dev_attr_fan3_beep.dev_attr.attr,
1416 &sensor_dev_attr_fan4_beep.dev_attr.attr,
1417 &sensor_dev_attr_fan5_beep.dev_attr.attr,
1418 };
1419
1420 static struct attribute *it87_attributes_vid[] = {
1421 &dev_attr_vrm.attr,
1422 &dev_attr_cpu0_vid.attr,
1423 NULL
1424 };
1425
1426 static const struct attribute_group it87_group_vid = {
1427 .attrs = it87_attributes_vid,
1428 };
1429
1430 /* SuperIO detection - will change isa_address if a chip is found */
1431 static int __init it87_find(unsigned short *address,
1432 struct it87_sio_data *sio_data)
1433 {
1434 int err = -ENODEV;
1435 u16 chip_type;
1436 const char *board_vendor, *board_name;
1437
1438 superio_enter();
1439 chip_type = force_id ? force_id : superio_inw(DEVID);
1440
1441 switch (chip_type) {
1442 case IT8705F_DEVID:
1443 sio_data->type = it87;
1444 break;
1445 case IT8712F_DEVID:
1446 sio_data->type = it8712;
1447 break;
1448 case IT8716F_DEVID:
1449 case IT8726F_DEVID:
1450 sio_data->type = it8716;
1451 break;
1452 case IT8718F_DEVID:
1453 sio_data->type = it8718;
1454 break;
1455 case IT8720F_DEVID:
1456 sio_data->type = it8720;
1457 break;
1458 case 0xffff: /* No device at all */
1459 goto exit;
1460 default:
1461 pr_debug(DRVNAME ": Unsupported chip (DEVID=0x%x)\n",
1462 chip_type);
1463 goto exit;
1464 }
1465
1466 superio_select(PME);
1467 if (!(superio_inb(IT87_ACT_REG) & 0x01)) {
1468 pr_info("it87: Device not activated, skipping\n");
1469 goto exit;
1470 }
1471
1472 *address = superio_inw(IT87_BASE_REG) & ~(IT87_EXTENT - 1);
1473 if (*address == 0) {
1474 pr_info("it87: Base address not set, skipping\n");
1475 goto exit;
1476 }
1477
1478 err = 0;
1479 sio_data->revision = superio_inb(DEVREV) & 0x0f;
1480 pr_info("it87: Found IT%04xF chip at 0x%x, revision %d\n",
1481 chip_type, *address, sio_data->revision);
1482
1483 /* Read GPIO config and VID value from LDN 7 (GPIO) */
1484 if (sio_data->type == it87) {
1485 /* The IT8705F doesn't have VID pins at all */
1486 sio_data->skip_vid = 1;
1487
1488 /* The IT8705F has a different LD number for GPIO */
1489 superio_select(5);
1490 sio_data->beep_pin = superio_inb(IT87_SIO_BEEP_PIN_REG) & 0x3f;
1491 } else {
1492 int reg;
1493
1494 superio_select(GPIO);
1495 /* We need at least 4 VID pins */
1496 reg = superio_inb(IT87_SIO_GPIO3_REG);
1497 if (reg & 0x0f) {
1498 pr_info("it87: VID is disabled (pins used for GPIO)\n");
1499 sio_data->skip_vid = 1;
1500 }
1501
1502 /* Check if fan3 is there or not */
1503 if (reg & (1 << 6))
1504 sio_data->skip_pwm |= (1 << 2);
1505 if (reg & (1 << 7))
1506 sio_data->skip_fan |= (1 << 2);
1507
1508 /* Check if fan2 is there or not */
1509 reg = superio_inb(IT87_SIO_GPIO5_REG);
1510 if (reg & (1 << 1))
1511 sio_data->skip_pwm |= (1 << 1);
1512 if (reg & (1 << 2))
1513 sio_data->skip_fan |= (1 << 1);
1514
1515 if ((sio_data->type == it8718 || sio_data->type == it8720)
1516 && !(sio_data->skip_vid))
1517 sio_data->vid_value = superio_inb(IT87_SIO_VID_REG);
1518
1519 reg = superio_inb(IT87_SIO_PINX2_REG);
1520 if (reg & (1 << 0))
1521 pr_info("it87: in3 is VCC (+5V)\n");
1522 if (reg & (1 << 1))
1523 pr_info("it87: in7 is VCCH (+5V Stand-By)\n");
1524
1525 sio_data->beep_pin = superio_inb(IT87_SIO_BEEP_PIN_REG) & 0x3f;
1526 }
1527 if (sio_data->beep_pin)
1528 pr_info("it87: Beeping is supported\n");
1529
1530 /* Disable specific features based on DMI strings */
1531 board_vendor = dmi_get_system_info(DMI_BOARD_VENDOR);
1532 board_name = dmi_get_system_info(DMI_BOARD_NAME);
1533 if (board_vendor && board_name) {
1534 if (strcmp(board_vendor, "nVIDIA") == 0
1535 && strcmp(board_name, "FN68PT") == 0) {
1536 /* On the Shuttle SN68PT, FAN_CTL2 is apparently not
1537 connected to a fan, but to something else. One user
1538 has reported instant system power-off when changing
1539 the PWM2 duty cycle, so we disable it.
1540 I use the board name string as the trigger in case
1541 the same board is ever used in other systems. */
1542 pr_info("it87: Disabling pwm2 due to "
1543 "hardware constraints\n");
1544 sio_data->skip_pwm = (1 << 1);
1545 }
1546 }
1547
1548 exit:
1549 superio_exit();
1550 return err;
1551 }
1552
1553 static void it87_remove_files(struct device *dev)
1554 {
1555 struct it87_data *data = platform_get_drvdata(pdev);
1556 struct it87_sio_data *sio_data = dev->platform_data;
1557 const struct attribute_group *fan_group = it87_get_fan_group(data);
1558 int i;
1559
1560 sysfs_remove_group(&dev->kobj, &it87_group);
1561 if (sio_data->beep_pin)
1562 sysfs_remove_group(&dev->kobj, &it87_group_beep);
1563 for (i = 0; i < 5; i++) {
1564 if (!(data->has_fan & (1 << i)))
1565 continue;
1566 sysfs_remove_group(&dev->kobj, &fan_group[i]);
1567 if (sio_data->beep_pin)
1568 sysfs_remove_file(&dev->kobj,
1569 it87_attributes_fan_beep[i]);
1570 }
1571 for (i = 0; i < 3; i++) {
1572 if (sio_data->skip_pwm & (1 << 0))
1573 continue;
1574 sysfs_remove_group(&dev->kobj, &it87_group_pwm[i]);
1575 if (has_old_autopwm(data))
1576 sysfs_remove_group(&dev->kobj,
1577 &it87_group_autopwm[i]);
1578 }
1579 if (!sio_data->skip_vid)
1580 sysfs_remove_group(&dev->kobj, &it87_group_vid);
1581 }
1582
1583 static int __devinit it87_probe(struct platform_device *pdev)
1584 {
1585 struct it87_data *data;
1586 struct resource *res;
1587 struct device *dev = &pdev->dev;
1588 struct it87_sio_data *sio_data = dev->platform_data;
1589 const struct attribute_group *fan_group;
1590 int err = 0, i;
1591 int enable_pwm_interface;
1592 int fan_beep_need_rw;
1593 static const char *names[] = {
1594 "it87",
1595 "it8712",
1596 "it8716",
1597 "it8718",
1598 "it8720",
1599 };
1600
1601 res = platform_get_resource(pdev, IORESOURCE_IO, 0);
1602 if (!request_region(res->start, IT87_EC_EXTENT, DRVNAME)) {
1603 dev_err(dev, "Failed to request region 0x%lx-0x%lx\n",
1604 (unsigned long)res->start,
1605 (unsigned long)(res->start + IT87_EC_EXTENT - 1));
1606 err = -EBUSY;
1607 goto ERROR0;
1608 }
1609
1610 data = kzalloc(sizeof(struct it87_data), GFP_KERNEL);
1611 if (!data) {
1612 err = -ENOMEM;
1613 goto ERROR1;
1614 }
1615
1616 data->addr = res->start;
1617 data->type = sio_data->type;
1618 data->revision = sio_data->revision;
1619 data->name = names[sio_data->type];
1620
1621 /* Now, we do the remaining detection. */
1622 if ((it87_read_value(data, IT87_REG_CONFIG) & 0x80)
1623 || it87_read_value(data, IT87_REG_CHIPID) != 0x90) {
1624 err = -ENODEV;
1625 goto ERROR2;
1626 }
1627
1628 platform_set_drvdata(pdev, data);
1629
1630 mutex_init(&data->update_lock);
1631
1632 /* Check PWM configuration */
1633 enable_pwm_interface = it87_check_pwm(dev);
1634
1635 /* Initialize the IT87 chip */
1636 it87_init_device(pdev);
1637
1638 /* Register sysfs hooks */
1639 err = sysfs_create_group(&dev->kobj, &it87_group);
1640 if (err)
1641 goto ERROR2;
1642
1643 if (sio_data->beep_pin) {
1644 err = sysfs_create_group(&dev->kobj, &it87_group_beep);
1645 if (err)
1646 goto ERROR4;
1647 }
1648
1649 /* Do not create fan files for disabled fans */
1650 fan_group = it87_get_fan_group(data);
1651 fan_beep_need_rw = 1;
1652 for (i = 0; i < 5; i++) {
1653 if (!(data->has_fan & (1 << i)))
1654 continue;
1655 err = sysfs_create_group(&dev->kobj, &fan_group[i]);
1656 if (err)
1657 goto ERROR4;
1658
1659 if (sio_data->beep_pin) {
1660 err = sysfs_create_file(&dev->kobj,
1661 it87_attributes_fan_beep[i]);
1662 if (err)
1663 goto ERROR4;
1664 if (!fan_beep_need_rw)
1665 continue;
1666
1667 /* As we have a single beep enable bit for all fans,
1668 * only the first enabled fan has a writable attribute
1669 * for it. */
1670 if (sysfs_chmod_file(&dev->kobj,
1671 it87_attributes_fan_beep[i],
1672 S_IRUGO | S_IWUSR))
1673 dev_dbg(dev, "chmod +w fan%d_beep failed\n",
1674 i + 1);
1675 fan_beep_need_rw = 0;
1676 }
1677 }
1678
1679 if (enable_pwm_interface) {
1680 for (i = 0; i < 3; i++) {
1681 if (sio_data->skip_pwm & (1 << i))
1682 continue;
1683 err = sysfs_create_group(&dev->kobj,
1684 &it87_group_pwm[i]);
1685 if (err)
1686 goto ERROR4;
1687
1688 if (!has_old_autopwm(data))
1689 continue;
1690 err = sysfs_create_group(&dev->kobj,
1691 &it87_group_autopwm[i]);
1692 if (err)
1693 goto ERROR4;
1694 }
1695 }
1696
1697 if (!sio_data->skip_vid) {
1698 data->vrm = vid_which_vrm();
1699 /* VID reading from Super-I/O config space if available */
1700 data->vid = sio_data->vid_value;
1701 err = sysfs_create_group(&dev->kobj, &it87_group_vid);
1702 if (err)
1703 goto ERROR4;
1704 }
1705
1706 data->hwmon_dev = hwmon_device_register(dev);
1707 if (IS_ERR(data->hwmon_dev)) {
1708 err = PTR_ERR(data->hwmon_dev);
1709 goto ERROR4;
1710 }
1711
1712 return 0;
1713
1714 ERROR4:
1715 it87_remove_files(dev);
1716 ERROR2:
1717 platform_set_drvdata(pdev, NULL);
1718 kfree(data);
1719 ERROR1:
1720 release_region(res->start, IT87_EC_EXTENT);
1721 ERROR0:
1722 return err;
1723 }
1724
1725 static int __devexit it87_remove(struct platform_device *pdev)
1726 {
1727 struct it87_data *data = platform_get_drvdata(pdev);
1728
1729 hwmon_device_unregister(data->hwmon_dev);
1730 it87_remove_files(&pdev->dev);
1731
1732 release_region(data->addr, IT87_EC_EXTENT);
1733 platform_set_drvdata(pdev, NULL);
1734 kfree(data);
1735
1736 return 0;
1737 }
1738
1739 /* Must be called with data->update_lock held, except during initialization.
1740 We ignore the IT87 BUSY flag at this moment - it could lead to deadlocks,
1741 would slow down the IT87 access and should not be necessary. */
1742 static int it87_read_value(struct it87_data *data, u8 reg)
1743 {
1744 outb_p(reg, data->addr + IT87_ADDR_REG_OFFSET);
1745 return inb_p(data->addr + IT87_DATA_REG_OFFSET);
1746 }
1747
1748 /* Must be called with data->update_lock held, except during initialization.
1749 We ignore the IT87 BUSY flag at this moment - it could lead to deadlocks,
1750 would slow down the IT87 access and should not be necessary. */
1751 static void it87_write_value(struct it87_data *data, u8 reg, u8 value)
1752 {
1753 outb_p(reg, data->addr + IT87_ADDR_REG_OFFSET);
1754 outb_p(value, data->addr + IT87_DATA_REG_OFFSET);
1755 }
1756
1757 /* Return 1 if and only if the PWM interface is safe to use */
1758 static int __devinit it87_check_pwm(struct device *dev)
1759 {
1760 struct it87_data *data = dev_get_drvdata(dev);
1761 /* Some BIOSes fail to correctly configure the IT87 fans. All fans off
1762 * and polarity set to active low is sign that this is the case so we
1763 * disable pwm control to protect the user. */
1764 int tmp = it87_read_value(data, IT87_REG_FAN_CTL);
1765 if ((tmp & 0x87) == 0) {
1766 if (fix_pwm_polarity) {
1767 /* The user asks us to attempt a chip reconfiguration.
1768 * This means switching to active high polarity and
1769 * inverting all fan speed values. */
1770 int i;
1771 u8 pwm[3];
1772
1773 for (i = 0; i < 3; i++)
1774 pwm[i] = it87_read_value(data,
1775 IT87_REG_PWM(i));
1776
1777 /* If any fan is in automatic pwm mode, the polarity
1778 * might be correct, as suspicious as it seems, so we
1779 * better don't change anything (but still disable the
1780 * PWM interface). */
1781 if (!((pwm[0] | pwm[1] | pwm[2]) & 0x80)) {
1782 dev_info(dev, "Reconfiguring PWM to "
1783 "active high polarity\n");
1784 it87_write_value(data, IT87_REG_FAN_CTL,
1785 tmp | 0x87);
1786 for (i = 0; i < 3; i++)
1787 it87_write_value(data,
1788 IT87_REG_PWM(i),
1789 0x7f & ~pwm[i]);
1790 return 1;
1791 }
1792
1793 dev_info(dev, "PWM configuration is "
1794 "too broken to be fixed\n");
1795 }
1796
1797 dev_info(dev, "Detected broken BIOS "
1798 "defaults, disabling PWM interface\n");
1799 return 0;
1800 } else if (fix_pwm_polarity) {
1801 dev_info(dev, "PWM configuration looks "
1802 "sane, won't touch\n");
1803 }
1804
1805 return 1;
1806 }
1807
1808 /* Called when we have found a new IT87. */
1809 static void __devinit it87_init_device(struct platform_device *pdev)
1810 {
1811 struct it87_sio_data *sio_data = pdev->dev.platform_data;
1812 struct it87_data *data = platform_get_drvdata(pdev);
1813 int tmp, i;
1814 u8 mask;
1815
1816 /* For each PWM channel:
1817 * - If it is in automatic mode, setting to manual mode should set
1818 * the fan to full speed by default.
1819 * - If it is in manual mode, we need a mapping to temperature
1820 * channels to use when later setting to automatic mode later.
1821 * Use a 1:1 mapping by default (we are clueless.)
1822 * In both cases, the value can (and should) be changed by the user
1823 * prior to switching to a different mode. */
1824 for (i = 0; i < 3; i++) {
1825 data->pwm_temp_map[i] = i;
1826 data->pwm_duty[i] = 0x7f; /* Full speed */
1827 data->auto_pwm[i][3] = 0x7f; /* Full speed, hard-coded */
1828 }
1829
1830 /* Some chips seem to have default value 0xff for all limit
1831 * registers. For low voltage limits it makes no sense and triggers
1832 * alarms, so change to 0 instead. For high temperature limits, it
1833 * means -1 degree C, which surprisingly doesn't trigger an alarm,
1834 * but is still confusing, so change to 127 degrees C. */
1835 for (i = 0; i < 8; i++) {
1836 tmp = it87_read_value(data, IT87_REG_VIN_MIN(i));
1837 if (tmp == 0xff)
1838 it87_write_value(data, IT87_REG_VIN_MIN(i), 0);
1839 }
1840 for (i = 0; i < 3; i++) {
1841 tmp = it87_read_value(data, IT87_REG_TEMP_HIGH(i));
1842 if (tmp == 0xff)
1843 it87_write_value(data, IT87_REG_TEMP_HIGH(i), 127);
1844 }
1845
1846 /* Temperature channels are not forcibly enabled, as they can be
1847 * set to two different sensor types and we can't guess which one
1848 * is correct for a given system. These channels can be enabled at
1849 * run-time through the temp{1-3}_type sysfs accessors if needed. */
1850
1851 /* Check if voltage monitors are reset manually or by some reason */
1852 tmp = it87_read_value(data, IT87_REG_VIN_ENABLE);
1853 if ((tmp & 0xff) == 0) {
1854 /* Enable all voltage monitors */
1855 it87_write_value(data, IT87_REG_VIN_ENABLE, 0xff);
1856 }
1857
1858 /* Check if tachometers are reset manually or by some reason */
1859 mask = 0x70 & ~(sio_data->skip_fan << 4);
1860 data->fan_main_ctrl = it87_read_value(data, IT87_REG_FAN_MAIN_CTRL);
1861 if ((data->fan_main_ctrl & mask) == 0) {
1862 /* Enable all fan tachometers */
1863 data->fan_main_ctrl |= mask;
1864 it87_write_value(data, IT87_REG_FAN_MAIN_CTRL,
1865 data->fan_main_ctrl);
1866 }
1867 data->has_fan = (data->fan_main_ctrl >> 4) & 0x07;
1868
1869 /* Set tachometers to 16-bit mode if needed */
1870 if (has_16bit_fans(data)) {
1871 tmp = it87_read_value(data, IT87_REG_FAN_16BIT);
1872 if (~tmp & 0x07 & data->has_fan) {
1873 dev_dbg(&pdev->dev,
1874 "Setting fan1-3 to 16-bit mode\n");
1875 it87_write_value(data, IT87_REG_FAN_16BIT,
1876 tmp | 0x07);
1877 }
1878 /* IT8705F only supports three fans. */
1879 if (data->type != it87) {
1880 if (tmp & (1 << 4))
1881 data->has_fan |= (1 << 3); /* fan4 enabled */
1882 if (tmp & (1 << 5))
1883 data->has_fan |= (1 << 4); /* fan5 enabled */
1884 }
1885 }
1886
1887 /* Fan input pins may be used for alternative functions */
1888 data->has_fan &= ~sio_data->skip_fan;
1889
1890 /* Start monitoring */
1891 it87_write_value(data, IT87_REG_CONFIG,
1892 (it87_read_value(data, IT87_REG_CONFIG) & 0x36)
1893 | (update_vbat ? 0x41 : 0x01));
1894 }
1895
1896 static void it87_update_pwm_ctrl(struct it87_data *data, int nr)
1897 {
1898 data->pwm_ctrl[nr] = it87_read_value(data, IT87_REG_PWM(nr));
1899 if (data->pwm_ctrl[nr] & 0x80) /* Automatic mode */
1900 data->pwm_temp_map[nr] = data->pwm_ctrl[nr] & 0x03;
1901 else /* Manual mode */
1902 data->pwm_duty[nr] = data->pwm_ctrl[nr] & 0x7f;
1903
1904 if (has_old_autopwm(data)) {
1905 int i;
1906
1907 for (i = 0; i < 5 ; i++)
1908 data->auto_temp[nr][i] = it87_read_value(data,
1909 IT87_REG_AUTO_TEMP(nr, i));
1910 for (i = 0; i < 3 ; i++)
1911 data->auto_pwm[nr][i] = it87_read_value(data,
1912 IT87_REG_AUTO_PWM(nr, i));
1913 }
1914 }
1915
1916 static struct it87_data *it87_update_device(struct device *dev)
1917 {
1918 struct it87_data *data = dev_get_drvdata(dev);
1919 int i;
1920
1921 mutex_lock(&data->update_lock);
1922
1923 if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
1924 || !data->valid) {
1925 if (update_vbat) {
1926 /* Cleared after each update, so reenable. Value
1927 returned by this read will be previous value */
1928 it87_write_value(data, IT87_REG_CONFIG,
1929 it87_read_value(data, IT87_REG_CONFIG) | 0x40);
1930 }
1931 for (i = 0; i <= 7; i++) {
1932 data->in[i] =
1933 it87_read_value(data, IT87_REG_VIN(i));
1934 data->in_min[i] =
1935 it87_read_value(data, IT87_REG_VIN_MIN(i));
1936 data->in_max[i] =
1937 it87_read_value(data, IT87_REG_VIN_MAX(i));
1938 }
1939 /* in8 (battery) has no limit registers */
1940 data->in[8] = it87_read_value(data, IT87_REG_VIN(8));
1941
1942 for (i = 0; i < 5; i++) {
1943 /* Skip disabled fans */
1944 if (!(data->has_fan & (1 << i)))
1945 continue;
1946
1947 data->fan_min[i] =
1948 it87_read_value(data, IT87_REG_FAN_MIN[i]);
1949 data->fan[i] = it87_read_value(data,
1950 IT87_REG_FAN[i]);
1951 /* Add high byte if in 16-bit mode */
1952 if (has_16bit_fans(data)) {
1953 data->fan[i] |= it87_read_value(data,
1954 IT87_REG_FANX[i]) << 8;
1955 data->fan_min[i] |= it87_read_value(data,
1956 IT87_REG_FANX_MIN[i]) << 8;
1957 }
1958 }
1959 for (i = 0; i < 3; i++) {
1960 data->temp[i] =
1961 it87_read_value(data, IT87_REG_TEMP(i));
1962 data->temp_high[i] =
1963 it87_read_value(data, IT87_REG_TEMP_HIGH(i));
1964 data->temp_low[i] =
1965 it87_read_value(data, IT87_REG_TEMP_LOW(i));
1966 }
1967
1968 /* Newer chips don't have clock dividers */
1969 if ((data->has_fan & 0x07) && !has_16bit_fans(data)) {
1970 i = it87_read_value(data, IT87_REG_FAN_DIV);
1971 data->fan_div[0] = i & 0x07;
1972 data->fan_div[1] = (i >> 3) & 0x07;
1973 data->fan_div[2] = (i & 0x40) ? 3 : 1;
1974 }
1975
1976 data->alarms =
1977 it87_read_value(data, IT87_REG_ALARM1) |
1978 (it87_read_value(data, IT87_REG_ALARM2) << 8) |
1979 (it87_read_value(data, IT87_REG_ALARM3) << 16);
1980 data->beeps = it87_read_value(data, IT87_REG_BEEP_ENABLE);
1981
1982 data->fan_main_ctrl = it87_read_value(data,
1983 IT87_REG_FAN_MAIN_CTRL);
1984 data->fan_ctl = it87_read_value(data, IT87_REG_FAN_CTL);
1985 for (i = 0; i < 3; i++)
1986 it87_update_pwm_ctrl(data, i);
1987
1988 data->sensor = it87_read_value(data, IT87_REG_TEMP_ENABLE);
1989 /* The 8705 does not have VID capability.
1990 The 8718 and the 8720 don't use IT87_REG_VID for the
1991 same purpose. */
1992 if (data->type == it8712 || data->type == it8716) {
1993 data->vid = it87_read_value(data, IT87_REG_VID);
1994 /* The older IT8712F revisions had only 5 VID pins,
1995 but we assume it is always safe to read 6 bits. */
1996 data->vid &= 0x3f;
1997 }
1998 data->last_updated = jiffies;
1999 data->valid = 1;
2000 }
2001
2002 mutex_unlock(&data->update_lock);
2003
2004 return data;
2005 }
2006
2007 static int __init it87_device_add(unsigned short address,
2008 const struct it87_sio_data *sio_data)
2009 {
2010 struct resource res = {
2011 .start = address + IT87_EC_OFFSET,
2012 .end = address + IT87_EC_OFFSET + IT87_EC_EXTENT - 1,
2013 .name = DRVNAME,
2014 .flags = IORESOURCE_IO,
2015 };
2016 int err;
2017
2018 err = acpi_check_resource_conflict(&res);
2019 if (err)
2020 goto exit;
2021
2022 pdev = platform_device_alloc(DRVNAME, address);
2023 if (!pdev) {
2024 err = -ENOMEM;
2025 printk(KERN_ERR DRVNAME ": Device allocation failed\n");
2026 goto exit;
2027 }
2028
2029 err = platform_device_add_resources(pdev, &res, 1);
2030 if (err) {
2031 printk(KERN_ERR DRVNAME ": Device resource addition failed "
2032 "(%d)\n", err);
2033 goto exit_device_put;
2034 }
2035
2036 err = platform_device_add_data(pdev, sio_data,
2037 sizeof(struct it87_sio_data));
2038 if (err) {
2039 printk(KERN_ERR DRVNAME ": Platform data allocation failed\n");
2040 goto exit_device_put;
2041 }
2042
2043 err = platform_device_add(pdev);
2044 if (err) {
2045 printk(KERN_ERR DRVNAME ": Device addition failed (%d)\n",
2046 err);
2047 goto exit_device_put;
2048 }
2049
2050 return 0;
2051
2052 exit_device_put:
2053 platform_device_put(pdev);
2054 exit:
2055 return err;
2056 }
2057
2058 static int __init sm_it87_init(void)
2059 {
2060 int err;
2061 unsigned short isa_address = 0;
2062 struct it87_sio_data sio_data;
2063
2064 memset(&sio_data, 0, sizeof(struct it87_sio_data));
2065 err = it87_find(&isa_address, &sio_data);
2066 if (err)
2067 return err;
2068 err = platform_driver_register(&it87_driver);
2069 if (err)
2070 return err;
2071
2072 err = it87_device_add(isa_address, &sio_data);
2073 if (err) {
2074 platform_driver_unregister(&it87_driver);
2075 return err;
2076 }
2077
2078 return 0;
2079 }
2080
2081 static void __exit sm_it87_exit(void)
2082 {
2083 platform_device_unregister(pdev);
2084 platform_driver_unregister(&it87_driver);
2085 }
2086
2087
2088 MODULE_AUTHOR("Chris Gauthron, "
2089 "Jean Delvare <khali@linux-fr.org>");
2090 MODULE_DESCRIPTION("IT8705F/8712F/8716F/8718F/8720F/8726F, SiS950 driver");
2091 module_param(update_vbat, bool, 0);
2092 MODULE_PARM_DESC(update_vbat, "Update vbat if set else return powerup value");
2093 module_param(fix_pwm_polarity, bool, 0);
2094 MODULE_PARM_DESC(fix_pwm_polarity,
2095 "Force PWM polarity to active high (DANGEROUS)");
2096 MODULE_LICENSE("GPL");
2097
2098 module_init(sm_it87_init);
2099 module_exit(sm_it87_exit);
Linux with added FPC-III support