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Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris...
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / hwmon / it87.c
blobbb6405b92007b7b9a9ba2c95038e49f01211c7a0
1 /*
2 * it87.c - Part of lm_sensors, Linux kernel modules for hardware
3 * monitoring.
4 *
5 * The IT8705F is an LPC-based Super I/O part that contains UARTs, a
6 * parallel port, an IR port, a MIDI port, a floppy controller, etc., in
7 * addition to an Environment Controller (Enhanced Hardware Monitor and
8 * Fan Controller)
9 *
10 * This driver supports only the Environment Controller in the IT8705F and
11 * similar parts. The other devices are supported by different drivers.
12 *
13 * Supports: IT8705F Super I/O chip w/LPC interface
14 * IT8712F Super I/O chip w/LPC interface
15 * IT8716F Super I/O chip w/LPC interface
16 * IT8718F Super I/O chip w/LPC interface
17 * IT8720F Super I/O chip w/LPC interface
18 * IT8721F Super I/O chip w/LPC interface
19 * IT8726F Super I/O chip w/LPC interface
20 * IT8758E Super I/O chip w/LPC interface
21 * Sis950 A clone of the IT8705F
22 *
23 * Copyright (C) 2001 Chris Gauthron
24 * Copyright (C) 2005-2010 Jean Delvare <khali@linux-fr.org>
25 *
26 * This program is free software; you can redistribute it and/or modify
27 * it under the terms of the GNU General Public License as published by
28 * the Free Software Foundation; either version 2 of the License, or
29 * (at your option) any later version.
30 *
31 * This program is distributed in the hope that it will be useful,
32 * but WITHOUT ANY WARRANTY; without even the implied warranty of
33 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
34 * GNU General Public License for more details.
35 *
36 * You should have received a copy of the GNU General Public License
37 * along with this program; if not, write to the Free Software
38 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
39 */
40
41 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
42
43 #include <linux/module.h>
44 #include <linux/init.h>
45 #include <linux/slab.h>
46 #include <linux/jiffies.h>
47 #include <linux/platform_device.h>
48 #include <linux/hwmon.h>
49 #include <linux/hwmon-sysfs.h>
50 #include <linux/hwmon-vid.h>
51 #include <linux/err.h>
52 #include <linux/mutex.h>
53 #include <linux/sysfs.h>
54 #include <linux/string.h>
55 #include <linux/dmi.h>
56 #include <linux/acpi.h>
57 #include <linux/io.h>
58
59 #define DRVNAME "it87"
60
61 enum chips { it87, it8712, it8716, it8718, it8720, it8721 };
62
63 static unsigned short force_id;
64 module_param(force_id, ushort, 0);
65 MODULE_PARM_DESC(force_id, "Override the detected device ID");
66
67 static struct platform_device *pdev;
68
69 #define REG 0x2e /* The register to read/write */
70 #define DEV 0x07 /* Register: Logical device select */
71 #define VAL 0x2f /* The value to read/write */
72 #define PME 0x04 /* The device with the fan registers in it */
73
74 /* The device with the IT8718F/IT8720F VID value in it */
75 #define GPIO 0x07
76
77 #define DEVID 0x20 /* Register: Device ID */
78 #define DEVREV 0x22 /* Register: Device Revision */
79
80 static inline int superio_inb(int reg)
81 {
82 outb(reg, REG);
83 return inb(VAL);
84 }
85
86 static inline void superio_outb(int reg, int val)
87 {
88 outb(reg, REG);
89 outb(val, VAL);
90 }
91
92 static int superio_inw(int reg)
93 {
94 int val;
95 outb(reg++, REG);
96 val = inb(VAL) << 8;
97 outb(reg, REG);
98 val |= inb(VAL);
99 return val;
100 }
101
102 static inline void superio_select(int ldn)
103 {
104 outb(DEV, REG);
105 outb(ldn, VAL);
106 }
107
108 static inline int superio_enter(void)
109 {
110 /*
111 * Try to reserve REG and REG + 1 for exclusive access.
112 */
113 if (!request_muxed_region(REG, 2, DRVNAME))
114 return -EBUSY;
115
116 outb(0x87, REG);
117 outb(0x01, REG);
118 outb(0x55, REG);
119 outb(0x55, REG);
120 return 0;
121 }
122
123 static inline void superio_exit(void)
124 {
125 outb(0x02, REG);
126 outb(0x02, VAL);
127 release_region(REG, 2);
128 }
129
130 /* Logical device 4 registers */
131 #define IT8712F_DEVID 0x8712
132 #define IT8705F_DEVID 0x8705
133 #define IT8716F_DEVID 0x8716
134 #define IT8718F_DEVID 0x8718
135 #define IT8720F_DEVID 0x8720
136 #define IT8721F_DEVID 0x8721
137 #define IT8726F_DEVID 0x8726
138 #define IT87_ACT_REG 0x30
139 #define IT87_BASE_REG 0x60
140
141 /* Logical device 7 registers (IT8712F and later) */
142 #define IT87_SIO_GPIO3_REG 0x27
143 #define IT87_SIO_GPIO5_REG 0x29
144 #define IT87_SIO_PINX2_REG 0x2c /* Pin selection */
145 #define IT87_SIO_VID_REG 0xfc /* VID value */
146 #define IT87_SIO_BEEP_PIN_REG 0xf6 /* Beep pin mapping */
147
148 /* Update battery voltage after every reading if true */
149 static int update_vbat;
150
151 /* Not all BIOSes properly configure the PWM registers */
152 static int fix_pwm_polarity;
153
154 /* Many IT87 constants specified below */
155
156 /* Length of ISA address segment */
157 #define IT87_EXTENT 8
158
159 /* Length of ISA address segment for Environmental Controller */
160 #define IT87_EC_EXTENT 2
161
162 /* Offset of EC registers from ISA base address */
163 #define IT87_EC_OFFSET 5
164
165 /* Where are the ISA address/data registers relative to the EC base address */
166 #define IT87_ADDR_REG_OFFSET 0
167 #define IT87_DATA_REG_OFFSET 1
168
169 /*----- The IT87 registers -----*/
170
171 #define IT87_REG_CONFIG 0x00
172
173 #define IT87_REG_ALARM1 0x01
174 #define IT87_REG_ALARM2 0x02
175 #define IT87_REG_ALARM3 0x03
176
177 /* The IT8718F and IT8720F have the VID value in a different register, in
178 Super-I/O configuration space. */
179 #define IT87_REG_VID 0x0a
180 /* The IT8705F and IT8712F earlier than revision 0x08 use register 0x0b
181 for fan divisors. Later IT8712F revisions must use 16-bit tachometer
182 mode. */
183 #define IT87_REG_FAN_DIV 0x0b
184 #define IT87_REG_FAN_16BIT 0x0c
185
186 /* Monitors: 9 voltage (0 to 7, battery), 3 temp (1 to 3), 3 fan (1 to 3) */
187
188 static const u8 IT87_REG_FAN[] = { 0x0d, 0x0e, 0x0f, 0x80, 0x82 };
189 static const u8 IT87_REG_FAN_MIN[] = { 0x10, 0x11, 0x12, 0x84, 0x86 };
190 static const u8 IT87_REG_FANX[] = { 0x18, 0x19, 0x1a, 0x81, 0x83 };
191 static const u8 IT87_REG_FANX_MIN[] = { 0x1b, 0x1c, 0x1d, 0x85, 0x87 };
192 #define IT87_REG_FAN_MAIN_CTRL 0x13
193 #define IT87_REG_FAN_CTL 0x14
194 #define IT87_REG_PWM(nr) (0x15 + (nr))
195 #define IT87_REG_PWM_DUTY(nr) (0x63 + (nr) * 8)
196
197 #define IT87_REG_VIN(nr) (0x20 + (nr))
198 #define IT87_REG_TEMP(nr) (0x29 + (nr))
199
200 #define IT87_REG_VIN_MAX(nr) (0x30 + (nr) * 2)
201 #define IT87_REG_VIN_MIN(nr) (0x31 + (nr) * 2)
202 #define IT87_REG_TEMP_HIGH(nr) (0x40 + (nr) * 2)
203 #define IT87_REG_TEMP_LOW(nr) (0x41 + (nr) * 2)
204
205 #define IT87_REG_VIN_ENABLE 0x50
206 #define IT87_REG_TEMP_ENABLE 0x51
207 #define IT87_REG_BEEP_ENABLE 0x5c
208
209 #define IT87_REG_CHIPID 0x58
210
211 #define IT87_REG_AUTO_TEMP(nr, i) (0x60 + (nr) * 8 + (i))
212 #define IT87_REG_AUTO_PWM(nr, i) (0x65 + (nr) * 8 + (i))
213
214
215 struct it87_sio_data {
216 enum chips type;
217 /* Values read from Super-I/O config space */
218 u8 revision;
219 u8 vid_value;
220 u8 beep_pin;
221 u8 internal; /* Internal sensors can be labeled */
222 /* Features skipped based on config or DMI */
223 u8 skip_vid;
224 u8 skip_fan;
225 u8 skip_pwm;
226 };
227
228 /* For each registered chip, we need to keep some data in memory.
229 The structure is dynamically allocated. */
230 struct it87_data {
231 struct device *hwmon_dev;
232 enum chips type;
233 u8 revision;
234
235 unsigned short addr;
236 const char *name;
237 struct mutex update_lock;
238 char valid; /* !=0 if following fields are valid */
239 unsigned long last_updated; /* In jiffies */
240
241 u16 in_scaled; /* Internal voltage sensors are scaled */
242 u8 in[9]; /* Register value */
243 u8 in_max[8]; /* Register value */
244 u8 in_min[8]; /* Register value */
245 u8 has_fan; /* Bitfield, fans enabled */
246 u16 fan[5]; /* Register values, possibly combined */
247 u16 fan_min[5]; /* Register values, possibly combined */
248 s8 temp[3]; /* Register value */
249 s8 temp_high[3]; /* Register value */
250 s8 temp_low[3]; /* Register value */
251 u8 sensor; /* Register value */
252 u8 fan_div[3]; /* Register encoding, shifted right */
253 u8 vid; /* Register encoding, combined */
254 u8 vrm;
255 u32 alarms; /* Register encoding, combined */
256 u8 beeps; /* Register encoding */
257 u8 fan_main_ctrl; /* Register value */
258 u8 fan_ctl; /* Register value */
259
260 /* The following 3 arrays correspond to the same registers up to
261 * the IT8720F. The meaning of bits 6-0 depends on the value of bit
262 * 7, and we want to preserve settings on mode changes, so we have
263 * to track all values separately.
264 * Starting with the IT8721F, the manual PWM duty cycles are stored
265 * in separate registers (8-bit values), so the separate tracking
266 * is no longer needed, but it is still done to keep the driver
267 * simple. */
268 u8 pwm_ctrl[3]; /* Register value */
269 u8 pwm_duty[3]; /* Manual PWM value set by user */
270 u8 pwm_temp_map[3]; /* PWM to temp. chan. mapping (bits 1-0) */
271
272 /* Automatic fan speed control registers */
273 u8 auto_pwm[3][4]; /* [nr][3] is hard-coded */
274 s8 auto_temp[3][5]; /* [nr][0] is point1_temp_hyst */
275 };
276
277 static u8 in_to_reg(const struct it87_data *data, int nr, long val)
278 {
279 long lsb;
280
281 if (data->type == it8721) {
282 if (data->in_scaled & (1 << nr))
283 lsb = 24;
284 else
285 lsb = 12;
286 } else
287 lsb = 16;
288
289 val = DIV_ROUND_CLOSEST(val, lsb);
290 return SENSORS_LIMIT(val, 0, 255);
291 }
292
293 static int in_from_reg(const struct it87_data *data, int nr, int val)
294 {
295 if (data->type == it8721) {
296 if (data->in_scaled & (1 << nr))
297 return val * 24;
298 else
299 return val * 12;
300 } else
301 return val * 16;
302 }
303
304 static inline u8 FAN_TO_REG(long rpm, int div)
305 {
306 if (rpm == 0)
307 return 255;
308 rpm = SENSORS_LIMIT(rpm, 1, 1000000);
309 return SENSORS_LIMIT((1350000 + rpm * div / 2) / (rpm * div), 1,
310 254);
311 }
312
313 static inline u16 FAN16_TO_REG(long rpm)
314 {
315 if (rpm == 0)
316 return 0xffff;
317 return SENSORS_LIMIT((1350000 + rpm) / (rpm * 2), 1, 0xfffe);
318 }
319
320 #define FAN_FROM_REG(val, div) ((val) == 0 ? -1 : (val) == 255 ? 0 : \
321 1350000 / ((val) * (div)))
322 /* The divider is fixed to 2 in 16-bit mode */
323 #define FAN16_FROM_REG(val) ((val) == 0 ? -1 : (val) == 0xffff ? 0 : \
324 1350000 / ((val) * 2))
325
326 #define TEMP_TO_REG(val) (SENSORS_LIMIT(((val) < 0 ? (((val) - 500) / 1000) : \
327 ((val) + 500) / 1000), -128, 127))
328 #define TEMP_FROM_REG(val) ((val) * 1000)
329
330 static u8 pwm_to_reg(const struct it87_data *data, long val)
331 {
332 if (data->type == it8721)
333 return val;
334 else
335 return val >> 1;
336 }
337
338 static int pwm_from_reg(const struct it87_data *data, u8 reg)
339 {
340 if (data->type == it8721)
341 return reg;
342 else
343 return (reg & 0x7f) << 1;
344 }
345
346
347 static int DIV_TO_REG(int val)
348 {
349 int answer = 0;
350 while (answer < 7 && (val >>= 1))
351 answer++;
352 return answer;
353 }
354 #define DIV_FROM_REG(val) (1 << (val))
355
356 static const unsigned int pwm_freq[8] = {
357 48000000 / 128,
358 24000000 / 128,
359 12000000 / 128,
360 8000000 / 128,
361 6000000 / 128,
362 3000000 / 128,
363 1500000 / 128,
364 750000 / 128,
365 };
366
367 static inline int has_16bit_fans(const struct it87_data *data)
368 {
369 /* IT8705F Datasheet 0.4.1, 3h == Version G.
370 IT8712F Datasheet 0.9.1, section 8.3.5 indicates 8h == Version J.
371 These are the first revisions with 16bit tachometer support. */
372 return (data->type == it87 && data->revision >= 0x03)
373 || (data->type == it8712 && data->revision >= 0x08)
374 || data->type == it8716
375 || data->type == it8718
376 || data->type == it8720
377 || data->type == it8721;
378 }
379
380 static inline int has_old_autopwm(const struct it87_data *data)
381 {
382 /* The old automatic fan speed control interface is implemented
383 by IT8705F chips up to revision F and IT8712F chips up to
384 revision G. */
385 return (data->type == it87 && data->revision < 0x03)
386 || (data->type == it8712 && data->revision < 0x08);
387 }
388
389 static int it87_probe(struct platform_device *pdev);
390 static int __devexit it87_remove(struct platform_device *pdev);
391
392 static int it87_read_value(struct it87_data *data, u8 reg);
393 static void it87_write_value(struct it87_data *data, u8 reg, u8 value);
394 static struct it87_data *it87_update_device(struct device *dev);
395 static int it87_check_pwm(struct device *dev);
396 static void it87_init_device(struct platform_device *pdev);
397
398
399 static struct platform_driver it87_driver = {
400 .driver = {
401 .owner = THIS_MODULE,
402 .name = DRVNAME,
403 },
404 .probe = it87_probe,
405 .remove = __devexit_p(it87_remove),
406 };
407
408 static ssize_t show_in(struct device *dev, struct device_attribute *attr,
409 char *buf)
410 {
411 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
412 int nr = sensor_attr->index;
413
414 struct it87_data *data = it87_update_device(dev);
415 return sprintf(buf, "%d\n", in_from_reg(data, nr, data->in[nr]));
416 }
417
418 static ssize_t show_in_min(struct device *dev, struct device_attribute *attr,
419 char *buf)
420 {
421 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
422 int nr = sensor_attr->index;
423
424 struct it87_data *data = it87_update_device(dev);
425 return sprintf(buf, "%d\n", in_from_reg(data, nr, data->in_min[nr]));
426 }
427
428 static ssize_t show_in_max(struct device *dev, struct device_attribute *attr,
429 char *buf)
430 {
431 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
432 int nr = sensor_attr->index;
433
434 struct it87_data *data = it87_update_device(dev);
435 return sprintf(buf, "%d\n", in_from_reg(data, nr, data->in_max[nr]));
436 }
437
438 static ssize_t set_in_min(struct device *dev, struct device_attribute *attr,
439 const char *buf, size_t count)
440 {
441 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
442 int nr = sensor_attr->index;
443
444 struct it87_data *data = dev_get_drvdata(dev);
445 unsigned long val;
446
447 if (strict_strtoul(buf, 10, &val) < 0)
448 return -EINVAL;
449
450 mutex_lock(&data->update_lock);
451 data->in_min[nr] = in_to_reg(data, nr, val);
452 it87_write_value(data, IT87_REG_VIN_MIN(nr),
453 data->in_min[nr]);
454 mutex_unlock(&data->update_lock);
455 return count;
456 }
457 static ssize_t set_in_max(struct device *dev, struct device_attribute *attr,
458 const char *buf, size_t count)
459 {
460 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
461 int nr = sensor_attr->index;
462
463 struct it87_data *data = dev_get_drvdata(dev);
464 unsigned long val;
465
466 if (strict_strtoul(buf, 10, &val) < 0)
467 return -EINVAL;
468
469 mutex_lock(&data->update_lock);
470 data->in_max[nr] = in_to_reg(data, nr, val);
471 it87_write_value(data, IT87_REG_VIN_MAX(nr),
472 data->in_max[nr]);
473 mutex_unlock(&data->update_lock);
474 return count;
475 }
476
477 #define show_in_offset(offset) \
478 static SENSOR_DEVICE_ATTR(in##offset##_input, S_IRUGO, \
479 show_in, NULL, offset);
480
481 #define limit_in_offset(offset) \
482 static SENSOR_DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \
483 show_in_min, set_in_min, offset); \
484 static SENSOR_DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \
485 show_in_max, set_in_max, offset);
486
487 show_in_offset(0);
488 limit_in_offset(0);
489 show_in_offset(1);
490 limit_in_offset(1);
491 show_in_offset(2);
492 limit_in_offset(2);
493 show_in_offset(3);
494 limit_in_offset(3);
495 show_in_offset(4);
496 limit_in_offset(4);
497 show_in_offset(5);
498 limit_in_offset(5);
499 show_in_offset(6);
500 limit_in_offset(6);
501 show_in_offset(7);
502 limit_in_offset(7);
503 show_in_offset(8);
504
505 /* 3 temperatures */
506 static ssize_t show_temp(struct device *dev, struct device_attribute *attr,
507 char *buf)
508 {
509 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
510 int nr = sensor_attr->index;
511
512 struct it87_data *data = it87_update_device(dev);
513 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[nr]));
514 }
515 static ssize_t show_temp_max(struct device *dev, struct device_attribute *attr,
516 char *buf)
517 {
518 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
519 int nr = sensor_attr->index;
520
521 struct it87_data *data = it87_update_device(dev);
522 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_high[nr]));
523 }
524 static ssize_t show_temp_min(struct device *dev, struct device_attribute *attr,
525 char *buf)
526 {
527 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
528 int nr = sensor_attr->index;
529
530 struct it87_data *data = it87_update_device(dev);
531 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_low[nr]));
532 }
533 static ssize_t set_temp_max(struct device *dev, struct device_attribute *attr,
534 const char *buf, size_t count)
535 {
536 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
537 int nr = sensor_attr->index;
538
539 struct it87_data *data = dev_get_drvdata(dev);
540 long val;
541
542 if (strict_strtol(buf, 10, &val) < 0)
543 return -EINVAL;
544
545 mutex_lock(&data->update_lock);
546 data->temp_high[nr] = TEMP_TO_REG(val);
547 it87_write_value(data, IT87_REG_TEMP_HIGH(nr), data->temp_high[nr]);
548 mutex_unlock(&data->update_lock);
549 return count;
550 }
551 static ssize_t set_temp_min(struct device *dev, struct device_attribute *attr,
552 const char *buf, size_t count)
553 {
554 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
555 int nr = sensor_attr->index;
556
557 struct it87_data *data = dev_get_drvdata(dev);
558 long val;
559
560 if (strict_strtol(buf, 10, &val) < 0)
561 return -EINVAL;
562
563 mutex_lock(&data->update_lock);
564 data->temp_low[nr] = TEMP_TO_REG(val);
565 it87_write_value(data, IT87_REG_TEMP_LOW(nr), data->temp_low[nr]);
566 mutex_unlock(&data->update_lock);
567 return count;
568 }
569 #define show_temp_offset(offset) \
570 static SENSOR_DEVICE_ATTR(temp##offset##_input, S_IRUGO, \
571 show_temp, NULL, offset - 1); \
572 static SENSOR_DEVICE_ATTR(temp##offset##_max, S_IRUGO | S_IWUSR, \
573 show_temp_max, set_temp_max, offset - 1); \
574 static SENSOR_DEVICE_ATTR(temp##offset##_min, S_IRUGO | S_IWUSR, \
575 show_temp_min, set_temp_min, offset - 1);
576
577 show_temp_offset(1);
578 show_temp_offset(2);
579 show_temp_offset(3);
580
581 static ssize_t show_sensor(struct device *dev, struct device_attribute *attr,
582 char *buf)
583 {
584 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
585 int nr = sensor_attr->index;
586
587 struct it87_data *data = it87_update_device(dev);
588 u8 reg = data->sensor; /* In case the value is updated while
589 we use it */
590
591 if (reg & (1 << nr))
592 return sprintf(buf, "3\n"); /* thermal diode */
593 if (reg & (8 << nr))
594 return sprintf(buf, "4\n"); /* thermistor */
595 return sprintf(buf, "0\n"); /* disabled */
596 }
597 static ssize_t set_sensor(struct device *dev, struct device_attribute *attr,
598 const char *buf, size_t count)
599 {
600 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
601 int nr = sensor_attr->index;
602
603 struct it87_data *data = dev_get_drvdata(dev);
604 long val;
605 u8 reg;
606
607 if (strict_strtol(buf, 10, &val) < 0)
608 return -EINVAL;
609
610 reg = it87_read_value(data, IT87_REG_TEMP_ENABLE);
611 reg &= ~(1 << nr);
612 reg &= ~(8 << nr);
613 if (val == 2) { /* backwards compatibility */
614 dev_warn(dev, "Sensor type 2 is deprecated, please use 4 "
615 "instead\n");
616 val = 4;
617 }
618 /* 3 = thermal diode; 4 = thermistor; 0 = disabled */
619 if (val == 3)
620 reg |= 1 << nr;
621 else if (val == 4)
622 reg |= 8 << nr;
623 else if (val != 0)
624 return -EINVAL;
625
626 mutex_lock(&data->update_lock);
627 data->sensor = reg;
628 it87_write_value(data, IT87_REG_TEMP_ENABLE, data->sensor);
629 data->valid = 0; /* Force cache refresh */
630 mutex_unlock(&data->update_lock);
631 return count;
632 }
633 #define show_sensor_offset(offset) \
634 static SENSOR_DEVICE_ATTR(temp##offset##_type, S_IRUGO | S_IWUSR, \
635 show_sensor, set_sensor, offset - 1);
636
637 show_sensor_offset(1);
638 show_sensor_offset(2);
639 show_sensor_offset(3);
640
641 /* 3 Fans */
642
643 static int pwm_mode(const struct it87_data *data, int nr)
644 {
645 int ctrl = data->fan_main_ctrl & (1 << nr);
646
647 if (ctrl == 0) /* Full speed */
648 return 0;
649 if (data->pwm_ctrl[nr] & 0x80) /* Automatic mode */
650 return 2;
651 else /* Manual mode */
652 return 1;
653 }
654
655 static ssize_t show_fan(struct device *dev, struct device_attribute *attr,
656 char *buf)
657 {
658 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
659 int nr = sensor_attr->index;
660
661 struct it87_data *data = it87_update_device(dev);
662 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[nr],
663 DIV_FROM_REG(data->fan_div[nr])));
664 }
665 static ssize_t show_fan_min(struct device *dev, struct device_attribute *attr,
666 char *buf)
667 {
668 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
669 int nr = sensor_attr->index;
670
671 struct it87_data *data = it87_update_device(dev);
672 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[nr],
673 DIV_FROM_REG(data->fan_div[nr])));
674 }
675 static ssize_t show_fan_div(struct device *dev, struct device_attribute *attr,
676 char *buf)
677 {
678 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
679 int nr = sensor_attr->index;
680
681 struct it87_data *data = it87_update_device(dev);
682 return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr]));
683 }
684 static ssize_t show_pwm_enable(struct device *dev,
685 struct device_attribute *attr, char *buf)
686 {
687 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
688 int nr = sensor_attr->index;
689
690 struct it87_data *data = it87_update_device(dev);
691 return sprintf(buf, "%d\n", pwm_mode(data, nr));
692 }
693 static ssize_t show_pwm(struct device *dev, struct device_attribute *attr,
694 char *buf)
695 {
696 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
697 int nr = sensor_attr->index;
698
699 struct it87_data *data = it87_update_device(dev);
700 return sprintf(buf, "%d\n",
701 pwm_from_reg(data, data->pwm_duty[nr]));
702 }
703 static ssize_t show_pwm_freq(struct device *dev, struct device_attribute *attr,
704 char *buf)
705 {
706 struct it87_data *data = it87_update_device(dev);
707 int index = (data->fan_ctl >> 4) & 0x07;
708
709 return sprintf(buf, "%u\n", pwm_freq[index]);
710 }
711 static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr,
712 const char *buf, size_t count)
713 {
714 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
715 int nr = sensor_attr->index;
716
717 struct it87_data *data = dev_get_drvdata(dev);
718 long val;
719 u8 reg;
720
721 if (strict_strtol(buf, 10, &val) < 0)
722 return -EINVAL;
723
724 mutex_lock(&data->update_lock);
725 reg = it87_read_value(data, IT87_REG_FAN_DIV);
726 switch (nr) {
727 case 0:
728 data->fan_div[nr] = reg & 0x07;
729 break;
730 case 1:
731 data->fan_div[nr] = (reg >> 3) & 0x07;
732 break;
733 case 2:
734 data->fan_div[nr] = (reg & 0x40) ? 3 : 1;
735 break;
736 }
737
738 data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr]));
739 it87_write_value(data, IT87_REG_FAN_MIN[nr], data->fan_min[nr]);
740 mutex_unlock(&data->update_lock);
741 return count;
742 }
743 static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr,
744 const char *buf, size_t count)
745 {
746 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
747 int nr = sensor_attr->index;
748
749 struct it87_data *data = dev_get_drvdata(dev);
750 unsigned long val;
751 int min;
752 u8 old;
753
754 if (strict_strtoul(buf, 10, &val) < 0)
755 return -EINVAL;
756
757 mutex_lock(&data->update_lock);
758 old = it87_read_value(data, IT87_REG_FAN_DIV);
759
760 /* Save fan min limit */
761 min = FAN_FROM_REG(data->fan_min[nr], DIV_FROM_REG(data->fan_div[nr]));
762
763 switch (nr) {
764 case 0:
765 case 1:
766 data->fan_div[nr] = DIV_TO_REG(val);
767 break;
768 case 2:
769 if (val < 8)
770 data->fan_div[nr] = 1;
771 else
772 data->fan_div[nr] = 3;
773 }
774 val = old & 0x80;
775 val |= (data->fan_div[0] & 0x07);
776 val |= (data->fan_div[1] & 0x07) << 3;
777 if (data->fan_div[2] == 3)
778 val |= 0x1 << 6;
779 it87_write_value(data, IT87_REG_FAN_DIV, val);
780
781 /* Restore fan min limit */
782 data->fan_min[nr] = FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr]));
783 it87_write_value(data, IT87_REG_FAN_MIN[nr], data->fan_min[nr]);
784
785 mutex_unlock(&data->update_lock);
786 return count;
787 }
788
789 /* Returns 0 if OK, -EINVAL otherwise */
790 static int check_trip_points(struct device *dev, int nr)
791 {
792 const struct it87_data *data = dev_get_drvdata(dev);
793 int i, err = 0;
794
795 if (has_old_autopwm(data)) {
796 for (i = 0; i < 3; i++) {
797 if (data->auto_temp[nr][i] > data->auto_temp[nr][i + 1])
798 err = -EINVAL;
799 }
800 for (i = 0; i < 2; i++) {
801 if (data->auto_pwm[nr][i] > data->auto_pwm[nr][i + 1])
802 err = -EINVAL;
803 }
804 }
805
806 if (err) {
807 dev_err(dev, "Inconsistent trip points, not switching to "
808 "automatic mode\n");
809 dev_err(dev, "Adjust the trip points and try again\n");
810 }
811 return err;
812 }
813
814 static ssize_t set_pwm_enable(struct device *dev,
815 struct device_attribute *attr, const char *buf, size_t count)
816 {
817 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
818 int nr = sensor_attr->index;
819
820 struct it87_data *data = dev_get_drvdata(dev);
821 long val;
822
823 if (strict_strtol(buf, 10, &val) < 0 || val < 0 || val > 2)
824 return -EINVAL;
825
826 /* Check trip points before switching to automatic mode */
827 if (val == 2) {
828 if (check_trip_points(dev, nr) < 0)
829 return -EINVAL;
830 }
831
832 mutex_lock(&data->update_lock);
833
834 if (val == 0) {
835 int tmp;
836 /* make sure the fan is on when in on/off mode */
837 tmp = it87_read_value(data, IT87_REG_FAN_CTL);
838 it87_write_value(data, IT87_REG_FAN_CTL, tmp | (1 << nr));
839 /* set on/off mode */
840 data->fan_main_ctrl &= ~(1 << nr);
841 it87_write_value(data, IT87_REG_FAN_MAIN_CTRL,
842 data->fan_main_ctrl);
843 } else {
844 if (val == 1) /* Manual mode */
845 data->pwm_ctrl[nr] = data->type == it8721 ?
846 data->pwm_temp_map[nr] :
847 data->pwm_duty[nr];
848 else /* Automatic mode */
849 data->pwm_ctrl[nr] = 0x80 | data->pwm_temp_map[nr];
850 it87_write_value(data, IT87_REG_PWM(nr), data->pwm_ctrl[nr]);
851 /* set SmartGuardian mode */
852 data->fan_main_ctrl |= (1 << nr);
853 it87_write_value(data, IT87_REG_FAN_MAIN_CTRL,
854 data->fan_main_ctrl);
855 }
856
857 mutex_unlock(&data->update_lock);
858 return count;
859 }
860 static ssize_t set_pwm(struct device *dev, struct device_attribute *attr,
861 const char *buf, size_t count)
862 {
863 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
864 int nr = sensor_attr->index;
865
866 struct it87_data *data = dev_get_drvdata(dev);
867 long val;
868
869 if (strict_strtol(buf, 10, &val) < 0 || val < 0 || val > 255)
870 return -EINVAL;
871
872 mutex_lock(&data->update_lock);
873 if (data->type == it8721) {
874 /* If we are in automatic mode, the PWM duty cycle register
875 * is read-only so we can't write the value */
876 if (data->pwm_ctrl[nr] & 0x80) {
877 mutex_unlock(&data->update_lock);
878 return -EBUSY;
879 }
880 data->pwm_duty[nr] = pwm_to_reg(data, val);
881 it87_write_value(data, IT87_REG_PWM_DUTY(nr),
882 data->pwm_duty[nr]);
883 } else {
884 data->pwm_duty[nr] = pwm_to_reg(data, val);
885 /* If we are in manual mode, write the duty cycle immediately;
886 * otherwise, just store it for later use. */
887 if (!(data->pwm_ctrl[nr] & 0x80)) {
888 data->pwm_ctrl[nr] = data->pwm_duty[nr];
889 it87_write_value(data, IT87_REG_PWM(nr),
890 data->pwm_ctrl[nr]);
891 }
892 }
893 mutex_unlock(&data->update_lock);
894 return count;
895 }
896 static ssize_t set_pwm_freq(struct device *dev,
897 struct device_attribute *attr, const char *buf, size_t count)
898 {
899 struct it87_data *data = dev_get_drvdata(dev);
900 unsigned long val;
901 int i;
902
903 if (strict_strtoul(buf, 10, &val) < 0)
904 return -EINVAL;
905
906 /* Search for the nearest available frequency */
907 for (i = 0; i < 7; i++) {
908 if (val > (pwm_freq[i] + pwm_freq[i+1]) / 2)
909 break;
910 }
911
912 mutex_lock(&data->update_lock);
913 data->fan_ctl = it87_read_value(data, IT87_REG_FAN_CTL) & 0x8f;
914 data->fan_ctl |= i << 4;
915 it87_write_value(data, IT87_REG_FAN_CTL, data->fan_ctl);
916 mutex_unlock(&data->update_lock);
917
918 return count;
919 }
920 static ssize_t show_pwm_temp_map(struct device *dev,
921 struct device_attribute *attr, char *buf)
922 {
923 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
924 int nr = sensor_attr->index;
925
926 struct it87_data *data = it87_update_device(dev);
927 int map;
928
929 if (data->pwm_temp_map[nr] < 3)
930 map = 1 << data->pwm_temp_map[nr];
931 else
932 map = 0; /* Should never happen */
933 return sprintf(buf, "%d\n", map);
934 }
935 static ssize_t set_pwm_temp_map(struct device *dev,
936 struct device_attribute *attr, const char *buf, size_t count)
937 {
938 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
939 int nr = sensor_attr->index;
940
941 struct it87_data *data = dev_get_drvdata(dev);
942 long val;
943 u8 reg;
944
945 /* This check can go away if we ever support automatic fan speed
946 control on newer chips. */
947 if (!has_old_autopwm(data)) {
948 dev_notice(dev, "Mapping change disabled for safety reasons\n");
949 return -EINVAL;
950 }
951
952 if (strict_strtol(buf, 10, &val) < 0)
953 return -EINVAL;
954
955 switch (val) {
956 case (1 << 0):
957 reg = 0x00;
958 break;
959 case (1 << 1):
960 reg = 0x01;
961 break;
962 case (1 << 2):
963 reg = 0x02;
964 break;
965 default:
966 return -EINVAL;
967 }
968
969 mutex_lock(&data->update_lock);
970 data->pwm_temp_map[nr] = reg;
971 /* If we are in automatic mode, write the temp mapping immediately;
972 * otherwise, just store it for later use. */
973 if (data->pwm_ctrl[nr] & 0x80) {
974 data->pwm_ctrl[nr] = 0x80 | data->pwm_temp_map[nr];
975 it87_write_value(data, IT87_REG_PWM(nr), data->pwm_ctrl[nr]);
976 }
977 mutex_unlock(&data->update_lock);
978 return count;
979 }
980
981 static ssize_t show_auto_pwm(struct device *dev,
982 struct device_attribute *attr, char *buf)
983 {
984 struct it87_data *data = it87_update_device(dev);
985 struct sensor_device_attribute_2 *sensor_attr =
986 to_sensor_dev_attr_2(attr);
987 int nr = sensor_attr->nr;
988 int point = sensor_attr->index;
989
990 return sprintf(buf, "%d\n",
991 pwm_from_reg(data, data->auto_pwm[nr][point]));
992 }
993
994 static ssize_t set_auto_pwm(struct device *dev,
995 struct device_attribute *attr, const char *buf, size_t count)
996 {
997 struct it87_data *data = dev_get_drvdata(dev);
998 struct sensor_device_attribute_2 *sensor_attr =
999 to_sensor_dev_attr_2(attr);
1000 int nr = sensor_attr->nr;
1001 int point = sensor_attr->index;
1002 long val;
1003
1004 if (strict_strtol(buf, 10, &val) < 0 || val < 0 || val > 255)
1005 return -EINVAL;
1006
1007 mutex_lock(&data->update_lock);
1008 data->auto_pwm[nr][point] = pwm_to_reg(data, val);
1009 it87_write_value(data, IT87_REG_AUTO_PWM(nr, point),
1010 data->auto_pwm[nr][point]);
1011 mutex_unlock(&data->update_lock);
1012 return count;
1013 }
1014
1015 static ssize_t show_auto_temp(struct device *dev,
1016 struct device_attribute *attr, char *buf)
1017 {
1018 struct it87_data *data = it87_update_device(dev);
1019 struct sensor_device_attribute_2 *sensor_attr =
1020 to_sensor_dev_attr_2(attr);
1021 int nr = sensor_attr->nr;
1022 int point = sensor_attr->index;
1023
1024 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->auto_temp[nr][point]));
1025 }
1026
1027 static ssize_t set_auto_temp(struct device *dev,
1028 struct device_attribute *attr, const char *buf, size_t count)
1029 {
1030 struct it87_data *data = dev_get_drvdata(dev);
1031 struct sensor_device_attribute_2 *sensor_attr =
1032 to_sensor_dev_attr_2(attr);
1033 int nr = sensor_attr->nr;
1034 int point = sensor_attr->index;
1035 long val;
1036
1037 if (strict_strtol(buf, 10, &val) < 0 || val < -128000 || val > 127000)
1038 return -EINVAL;
1039
1040 mutex_lock(&data->update_lock);
1041 data->auto_temp[nr][point] = TEMP_TO_REG(val);
1042 it87_write_value(data, IT87_REG_AUTO_TEMP(nr, point),
1043 data->auto_temp[nr][point]);
1044 mutex_unlock(&data->update_lock);
1045 return count;
1046 }
1047
1048 #define show_fan_offset(offset) \
1049 static SENSOR_DEVICE_ATTR(fan##offset##_input, S_IRUGO, \
1050 show_fan, NULL, offset - 1); \
1051 static SENSOR_DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \
1052 show_fan_min, set_fan_min, offset - 1); \
1053 static SENSOR_DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR, \
1054 show_fan_div, set_fan_div, offset - 1);
1055
1056 show_fan_offset(1);
1057 show_fan_offset(2);
1058 show_fan_offset(3);
1059
1060 #define show_pwm_offset(offset) \
1061 static SENSOR_DEVICE_ATTR(pwm##offset##_enable, S_IRUGO | S_IWUSR, \
1062 show_pwm_enable, set_pwm_enable, offset - 1); \
1063 static SENSOR_DEVICE_ATTR(pwm##offset, S_IRUGO | S_IWUSR, \
1064 show_pwm, set_pwm, offset - 1); \
1065 static DEVICE_ATTR(pwm##offset##_freq, \
1066 (offset == 1 ? S_IRUGO | S_IWUSR : S_IRUGO), \
1067 show_pwm_freq, (offset == 1 ? set_pwm_freq : NULL)); \
1068 static SENSOR_DEVICE_ATTR(pwm##offset##_auto_channels_temp, \
1069 S_IRUGO | S_IWUSR, show_pwm_temp_map, set_pwm_temp_map, \
1070 offset - 1); \
1071 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point1_pwm, \
1072 S_IRUGO | S_IWUSR, show_auto_pwm, set_auto_pwm, \
1073 offset - 1, 0); \
1074 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point2_pwm, \
1075 S_IRUGO | S_IWUSR, show_auto_pwm, set_auto_pwm, \
1076 offset - 1, 1); \
1077 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point3_pwm, \
1078 S_IRUGO | S_IWUSR, show_auto_pwm, set_auto_pwm, \
1079 offset - 1, 2); \
1080 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point4_pwm, \
1081 S_IRUGO, show_auto_pwm, NULL, offset - 1, 3); \
1082 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point1_temp, \
1083 S_IRUGO | S_IWUSR, show_auto_temp, set_auto_temp, \
1084 offset - 1, 1); \
1085 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point1_temp_hyst, \
1086 S_IRUGO | S_IWUSR, show_auto_temp, set_auto_temp, \
1087 offset - 1, 0); \
1088 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point2_temp, \
1089 S_IRUGO | S_IWUSR, show_auto_temp, set_auto_temp, \
1090 offset - 1, 2); \
1091 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point3_temp, \
1092 S_IRUGO | S_IWUSR, show_auto_temp, set_auto_temp, \
1093 offset - 1, 3); \
1094 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point4_temp, \
1095 S_IRUGO | S_IWUSR, show_auto_temp, set_auto_temp, \
1096 offset - 1, 4);
1097
1098 show_pwm_offset(1);
1099 show_pwm_offset(2);
1100 show_pwm_offset(3);
1101
1102 /* A different set of callbacks for 16-bit fans */
1103 static ssize_t show_fan16(struct device *dev, struct device_attribute *attr,
1104 char *buf)
1105 {
1106 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
1107 int nr = sensor_attr->index;
1108 struct it87_data *data = it87_update_device(dev);
1109 return sprintf(buf, "%d\n", FAN16_FROM_REG(data->fan[nr]));
1110 }
1111
1112 static ssize_t show_fan16_min(struct device *dev, struct device_attribute *attr,
1113 char *buf)
1114 {
1115 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
1116 int nr = sensor_attr->index;
1117 struct it87_data *data = it87_update_device(dev);
1118 return sprintf(buf, "%d\n", FAN16_FROM_REG(data->fan_min[nr]));
1119 }
1120
1121 static ssize_t set_fan16_min(struct device *dev, struct device_attribute *attr,
1122 const char *buf, size_t count)
1123 {
1124 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
1125 int nr = sensor_attr->index;
1126 struct it87_data *data = dev_get_drvdata(dev);
1127 long val;
1128
1129 if (strict_strtol(buf, 10, &val) < 0)
1130 return -EINVAL;
1131
1132 mutex_lock(&data->update_lock);
1133 data->fan_min[nr] = FAN16_TO_REG(val);
1134 it87_write_value(data, IT87_REG_FAN_MIN[nr],
1135 data->fan_min[nr] & 0xff);
1136 it87_write_value(data, IT87_REG_FANX_MIN[nr],
1137 data->fan_min[nr] >> 8);
1138 mutex_unlock(&data->update_lock);
1139 return count;
1140 }
1141
1142 /* We want to use the same sysfs file names as 8-bit fans, but we need
1143 different variable names, so we have to use SENSOR_ATTR instead of
1144 SENSOR_DEVICE_ATTR. */
1145 #define show_fan16_offset(offset) \
1146 static struct sensor_device_attribute sensor_dev_attr_fan##offset##_input16 \
1147 = SENSOR_ATTR(fan##offset##_input, S_IRUGO, \
1148 show_fan16, NULL, offset - 1); \
1149 static struct sensor_device_attribute sensor_dev_attr_fan##offset##_min16 \
1150 = SENSOR_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \
1151 show_fan16_min, set_fan16_min, offset - 1)
1152
1153 show_fan16_offset(1);
1154 show_fan16_offset(2);
1155 show_fan16_offset(3);
1156 show_fan16_offset(4);
1157 show_fan16_offset(5);
1158
1159 /* Alarms */
1160 static ssize_t show_alarms(struct device *dev, struct device_attribute *attr,
1161 char *buf)
1162 {
1163 struct it87_data *data = it87_update_device(dev);
1164 return sprintf(buf, "%u\n", data->alarms);
1165 }
1166 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
1167
1168 static ssize_t show_alarm(struct device *dev, struct device_attribute *attr,
1169 char *buf)
1170 {
1171 int bitnr = to_sensor_dev_attr(attr)->index;
1172 struct it87_data *data = it87_update_device(dev);
1173 return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1);
1174 }
1175 static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 8);
1176 static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 9);
1177 static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 10);
1178 static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 11);
1179 static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 12);
1180 static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 13);
1181 static SENSOR_DEVICE_ATTR(in6_alarm, S_IRUGO, show_alarm, NULL, 14);
1182 static SENSOR_DEVICE_ATTR(in7_alarm, S_IRUGO, show_alarm, NULL, 15);
1183 static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 0);
1184 static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 1);
1185 static SENSOR_DEVICE_ATTR(fan3_alarm, S_IRUGO, show_alarm, NULL, 2);
1186 static SENSOR_DEVICE_ATTR(fan4_alarm, S_IRUGO, show_alarm, NULL, 3);
1187 static SENSOR_DEVICE_ATTR(fan5_alarm, S_IRUGO, show_alarm, NULL, 6);
1188 static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 16);
1189 static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 17);
1190 static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL, 18);
1191
1192 static ssize_t show_beep(struct device *dev, struct device_attribute *attr,
1193 char *buf)
1194 {
1195 int bitnr = to_sensor_dev_attr(attr)->index;
1196 struct it87_data *data = it87_update_device(dev);
1197 return sprintf(buf, "%u\n", (data->beeps >> bitnr) & 1);
1198 }
1199 static ssize_t set_beep(struct device *dev, struct device_attribute *attr,
1200 const char *buf, size_t count)
1201 {
1202 int bitnr = to_sensor_dev_attr(attr)->index;
1203 struct it87_data *data = dev_get_drvdata(dev);
1204 long val;
1205
1206 if (strict_strtol(buf, 10, &val) < 0
1207 || (val != 0 && val != 1))
1208 return -EINVAL;
1209
1210 mutex_lock(&data->update_lock);
1211 data->beeps = it87_read_value(data, IT87_REG_BEEP_ENABLE);
1212 if (val)
1213 data->beeps |= (1 << bitnr);
1214 else
1215 data->beeps &= ~(1 << bitnr);
1216 it87_write_value(data, IT87_REG_BEEP_ENABLE, data->beeps);
1217 mutex_unlock(&data->update_lock);
1218 return count;
1219 }
1220
1221 static SENSOR_DEVICE_ATTR(in0_beep, S_IRUGO | S_IWUSR,
1222 show_beep, set_beep, 1);
1223 static SENSOR_DEVICE_ATTR(in1_beep, S_IRUGO, show_beep, NULL, 1);
1224 static SENSOR_DEVICE_ATTR(in2_beep, S_IRUGO, show_beep, NULL, 1);
1225 static SENSOR_DEVICE_ATTR(in3_beep, S_IRUGO, show_beep, NULL, 1);
1226 static SENSOR_DEVICE_ATTR(in4_beep, S_IRUGO, show_beep, NULL, 1);
1227 static SENSOR_DEVICE_ATTR(in5_beep, S_IRUGO, show_beep, NULL, 1);
1228 static SENSOR_DEVICE_ATTR(in6_beep, S_IRUGO, show_beep, NULL, 1);
1229 static SENSOR_DEVICE_ATTR(in7_beep, S_IRUGO, show_beep, NULL, 1);
1230 /* fanX_beep writability is set later */
1231 static SENSOR_DEVICE_ATTR(fan1_beep, S_IRUGO, show_beep, set_beep, 0);
1232 static SENSOR_DEVICE_ATTR(fan2_beep, S_IRUGO, show_beep, set_beep, 0);
1233 static SENSOR_DEVICE_ATTR(fan3_beep, S_IRUGO, show_beep, set_beep, 0);
1234 static SENSOR_DEVICE_ATTR(fan4_beep, S_IRUGO, show_beep, set_beep, 0);
1235 static SENSOR_DEVICE_ATTR(fan5_beep, S_IRUGO, show_beep, set_beep, 0);
1236 static SENSOR_DEVICE_ATTR(temp1_beep, S_IRUGO | S_IWUSR,
1237 show_beep, set_beep, 2);
1238 static SENSOR_DEVICE_ATTR(temp2_beep, S_IRUGO, show_beep, NULL, 2);
1239 static SENSOR_DEVICE_ATTR(temp3_beep, S_IRUGO, show_beep, NULL, 2);
1240
1241 static ssize_t show_vrm_reg(struct device *dev, struct device_attribute *attr,
1242 char *buf)
1243 {
1244 struct it87_data *data = dev_get_drvdata(dev);
1245 return sprintf(buf, "%u\n", data->vrm);
1246 }
1247 static ssize_t store_vrm_reg(struct device *dev, struct device_attribute *attr,
1248 const char *buf, size_t count)
1249 {
1250 struct it87_data *data = dev_get_drvdata(dev);
1251 unsigned long val;
1252
1253 if (strict_strtoul(buf, 10, &val) < 0)
1254 return -EINVAL;
1255
1256 data->vrm = val;
1257
1258 return count;
1259 }
1260 static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm_reg, store_vrm_reg);
1261
1262 static ssize_t show_vid_reg(struct device *dev, struct device_attribute *attr,
1263 char *buf)
1264 {
1265 struct it87_data *data = it87_update_device(dev);
1266 return sprintf(buf, "%ld\n", (long) vid_from_reg(data->vid, data->vrm));
1267 }
1268 static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid_reg, NULL);
1269
1270 static ssize_t show_label(struct device *dev, struct device_attribute *attr,
1271 char *buf)
1272 {
1273 static const char *labels[] = {
1274 "+5V",
1275 "5VSB",
1276 "Vbat",
1277 };
1278 static const char *labels_it8721[] = {
1279 "+3.3V",
1280 "3VSB",
1281 "Vbat",
1282 };
1283 struct it87_data *data = dev_get_drvdata(dev);
1284 int nr = to_sensor_dev_attr(attr)->index;
1285
1286 return sprintf(buf, "%s\n", data->type == it8721 ? labels_it8721[nr]
1287 : labels[nr]);
1288 }
1289 static SENSOR_DEVICE_ATTR(in3_label, S_IRUGO, show_label, NULL, 0);
1290 static SENSOR_DEVICE_ATTR(in7_label, S_IRUGO, show_label, NULL, 1);
1291 static SENSOR_DEVICE_ATTR(in8_label, S_IRUGO, show_label, NULL, 2);
1292
1293 static ssize_t show_name(struct device *dev, struct device_attribute
1294 *devattr, char *buf)
1295 {
1296 struct it87_data *data = dev_get_drvdata(dev);
1297 return sprintf(buf, "%s\n", data->name);
1298 }
1299 static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
1300
1301 static struct attribute *it87_attributes[] = {
1302 &sensor_dev_attr_in0_input.dev_attr.attr,
1303 &sensor_dev_attr_in1_input.dev_attr.attr,
1304 &sensor_dev_attr_in2_input.dev_attr.attr,
1305 &sensor_dev_attr_in3_input.dev_attr.attr,
1306 &sensor_dev_attr_in4_input.dev_attr.attr,
1307 &sensor_dev_attr_in5_input.dev_attr.attr,
1308 &sensor_dev_attr_in6_input.dev_attr.attr,
1309 &sensor_dev_attr_in7_input.dev_attr.attr,
1310 &sensor_dev_attr_in8_input.dev_attr.attr,
1311 &sensor_dev_attr_in0_min.dev_attr.attr,
1312 &sensor_dev_attr_in1_min.dev_attr.attr,
1313 &sensor_dev_attr_in2_min.dev_attr.attr,
1314 &sensor_dev_attr_in3_min.dev_attr.attr,
1315 &sensor_dev_attr_in4_min.dev_attr.attr,
1316 &sensor_dev_attr_in5_min.dev_attr.attr,
1317 &sensor_dev_attr_in6_min.dev_attr.attr,
1318 &sensor_dev_attr_in7_min.dev_attr.attr,
1319 &sensor_dev_attr_in0_max.dev_attr.attr,
1320 &sensor_dev_attr_in1_max.dev_attr.attr,
1321 &sensor_dev_attr_in2_max.dev_attr.attr,
1322 &sensor_dev_attr_in3_max.dev_attr.attr,
1323 &sensor_dev_attr_in4_max.dev_attr.attr,
1324 &sensor_dev_attr_in5_max.dev_attr.attr,
1325 &sensor_dev_attr_in6_max.dev_attr.attr,
1326 &sensor_dev_attr_in7_max.dev_attr.attr,
1327 &sensor_dev_attr_in0_alarm.dev_attr.attr,
1328 &sensor_dev_attr_in1_alarm.dev_attr.attr,
1329 &sensor_dev_attr_in2_alarm.dev_attr.attr,
1330 &sensor_dev_attr_in3_alarm.dev_attr.attr,
1331 &sensor_dev_attr_in4_alarm.dev_attr.attr,
1332 &sensor_dev_attr_in5_alarm.dev_attr.attr,
1333 &sensor_dev_attr_in6_alarm.dev_attr.attr,
1334 &sensor_dev_attr_in7_alarm.dev_attr.attr,
1335
1336 &sensor_dev_attr_temp1_input.dev_attr.attr,
1337 &sensor_dev_attr_temp2_input.dev_attr.attr,
1338 &sensor_dev_attr_temp3_input.dev_attr.attr,
1339 &sensor_dev_attr_temp1_max.dev_attr.attr,
1340 &sensor_dev_attr_temp2_max.dev_attr.attr,
1341 &sensor_dev_attr_temp3_max.dev_attr.attr,
1342 &sensor_dev_attr_temp1_min.dev_attr.attr,
1343 &sensor_dev_attr_temp2_min.dev_attr.attr,
1344 &sensor_dev_attr_temp3_min.dev_attr.attr,
1345 &sensor_dev_attr_temp1_type.dev_attr.attr,
1346 &sensor_dev_attr_temp2_type.dev_attr.attr,
1347 &sensor_dev_attr_temp3_type.dev_attr.attr,
1348 &sensor_dev_attr_temp1_alarm.dev_attr.attr,
1349 &sensor_dev_attr_temp2_alarm.dev_attr.attr,
1350 &sensor_dev_attr_temp3_alarm.dev_attr.attr,
1351
1352 &dev_attr_alarms.attr,
1353 &dev_attr_name.attr,
1354 NULL
1355 };
1356
1357 static const struct attribute_group it87_group = {
1358 .attrs = it87_attributes,
1359 };
1360
1361 static struct attribute *it87_attributes_beep[] = {
1362 &sensor_dev_attr_in0_beep.dev_attr.attr,
1363 &sensor_dev_attr_in1_beep.dev_attr.attr,
1364 &sensor_dev_attr_in2_beep.dev_attr.attr,
1365 &sensor_dev_attr_in3_beep.dev_attr.attr,
1366 &sensor_dev_attr_in4_beep.dev_attr.attr,
1367 &sensor_dev_attr_in5_beep.dev_attr.attr,
1368 &sensor_dev_attr_in6_beep.dev_attr.attr,
1369 &sensor_dev_attr_in7_beep.dev_attr.attr,
1370
1371 &sensor_dev_attr_temp1_beep.dev_attr.attr,
1372 &sensor_dev_attr_temp2_beep.dev_attr.attr,
1373 &sensor_dev_attr_temp3_beep.dev_attr.attr,
1374 NULL
1375 };
1376
1377 static const struct attribute_group it87_group_beep = {
1378 .attrs = it87_attributes_beep,
1379 };
1380
1381 static struct attribute *it87_attributes_fan16[5][3+1] = { {
1382 &sensor_dev_attr_fan1_input16.dev_attr.attr,
1383 &sensor_dev_attr_fan1_min16.dev_attr.attr,
1384 &sensor_dev_attr_fan1_alarm.dev_attr.attr,
1385 NULL
1386 }, {
1387 &sensor_dev_attr_fan2_input16.dev_attr.attr,
1388 &sensor_dev_attr_fan2_min16.dev_attr.attr,
1389 &sensor_dev_attr_fan2_alarm.dev_attr.attr,
1390 NULL
1391 }, {
1392 &sensor_dev_attr_fan3_input16.dev_attr.attr,
1393 &sensor_dev_attr_fan3_min16.dev_attr.attr,
1394 &sensor_dev_attr_fan3_alarm.dev_attr.attr,
1395 NULL
1396 }, {
1397 &sensor_dev_attr_fan4_input16.dev_attr.attr,
1398 &sensor_dev_attr_fan4_min16.dev_attr.attr,
1399 &sensor_dev_attr_fan4_alarm.dev_attr.attr,
1400 NULL
1401 }, {
1402 &sensor_dev_attr_fan5_input16.dev_attr.attr,
1403 &sensor_dev_attr_fan5_min16.dev_attr.attr,
1404 &sensor_dev_attr_fan5_alarm.dev_attr.attr,
1405 NULL
1406 } };
1407
1408 static const struct attribute_group it87_group_fan16[5] = {
1409 { .attrs = it87_attributes_fan16[0] },
1410 { .attrs = it87_attributes_fan16[1] },
1411 { .attrs = it87_attributes_fan16[2] },
1412 { .attrs = it87_attributes_fan16[3] },
1413 { .attrs = it87_attributes_fan16[4] },
1414 };
1415
1416 static struct attribute *it87_attributes_fan[3][4+1] = { {
1417 &sensor_dev_attr_fan1_input.dev_attr.attr,
1418 &sensor_dev_attr_fan1_min.dev_attr.attr,
1419 &sensor_dev_attr_fan1_div.dev_attr.attr,
1420 &sensor_dev_attr_fan1_alarm.dev_attr.attr,
1421 NULL
1422 }, {
1423 &sensor_dev_attr_fan2_input.dev_attr.attr,
1424 &sensor_dev_attr_fan2_min.dev_attr.attr,
1425 &sensor_dev_attr_fan2_div.dev_attr.attr,
1426 &sensor_dev_attr_fan2_alarm.dev_attr.attr,
1427 NULL
1428 }, {
1429 &sensor_dev_attr_fan3_input.dev_attr.attr,
1430 &sensor_dev_attr_fan3_min.dev_attr.attr,
1431 &sensor_dev_attr_fan3_div.dev_attr.attr,
1432 &sensor_dev_attr_fan3_alarm.dev_attr.attr,
1433 NULL
1434 } };
1435
1436 static const struct attribute_group it87_group_fan[3] = {
1437 { .attrs = it87_attributes_fan[0] },
1438 { .attrs = it87_attributes_fan[1] },
1439 { .attrs = it87_attributes_fan[2] },
1440 };
1441
1442 static const struct attribute_group *
1443 it87_get_fan_group(const struct it87_data *data)
1444 {
1445 return has_16bit_fans(data) ? it87_group_fan16 : it87_group_fan;
1446 }
1447
1448 static struct attribute *it87_attributes_pwm[3][4+1] = { {
1449 &sensor_dev_attr_pwm1_enable.dev_attr.attr,
1450 &sensor_dev_attr_pwm1.dev_attr.attr,
1451 &dev_attr_pwm1_freq.attr,
1452 &sensor_dev_attr_pwm1_auto_channels_temp.dev_attr.attr,
1453 NULL
1454 }, {
1455 &sensor_dev_attr_pwm2_enable.dev_attr.attr,
1456 &sensor_dev_attr_pwm2.dev_attr.attr,
1457 &dev_attr_pwm2_freq.attr,
1458 &sensor_dev_attr_pwm2_auto_channels_temp.dev_attr.attr,
1459 NULL
1460 }, {
1461 &sensor_dev_attr_pwm3_enable.dev_attr.attr,
1462 &sensor_dev_attr_pwm3.dev_attr.attr,
1463 &dev_attr_pwm3_freq.attr,
1464 &sensor_dev_attr_pwm3_auto_channels_temp.dev_attr.attr,
1465 NULL
1466 } };
1467
1468 static const struct attribute_group it87_group_pwm[3] = {
1469 { .attrs = it87_attributes_pwm[0] },
1470 { .attrs = it87_attributes_pwm[1] },
1471 { .attrs = it87_attributes_pwm[2] },
1472 };
1473
1474 static struct attribute *it87_attributes_autopwm[3][9+1] = { {
1475 &sensor_dev_attr_pwm1_auto_point1_pwm.dev_attr.attr,
1476 &sensor_dev_attr_pwm1_auto_point2_pwm.dev_attr.attr,
1477 &sensor_dev_attr_pwm1_auto_point3_pwm.dev_attr.attr,
1478 &sensor_dev_attr_pwm1_auto_point4_pwm.dev_attr.attr,
1479 &sensor_dev_attr_pwm1_auto_point1_temp.dev_attr.attr,
1480 &sensor_dev_attr_pwm1_auto_point1_temp_hyst.dev_attr.attr,
1481 &sensor_dev_attr_pwm1_auto_point2_temp.dev_attr.attr,
1482 &sensor_dev_attr_pwm1_auto_point3_temp.dev_attr.attr,
1483 &sensor_dev_attr_pwm1_auto_point4_temp.dev_attr.attr,
1484 NULL
1485 }, {
1486 &sensor_dev_attr_pwm2_auto_point1_pwm.dev_attr.attr,
1487 &sensor_dev_attr_pwm2_auto_point2_pwm.dev_attr.attr,
1488 &sensor_dev_attr_pwm2_auto_point3_pwm.dev_attr.attr,
1489 &sensor_dev_attr_pwm2_auto_point4_pwm.dev_attr.attr,
1490 &sensor_dev_attr_pwm2_auto_point1_temp.dev_attr.attr,
1491 &sensor_dev_attr_pwm2_auto_point1_temp_hyst.dev_attr.attr,
1492 &sensor_dev_attr_pwm2_auto_point2_temp.dev_attr.attr,
1493 &sensor_dev_attr_pwm2_auto_point3_temp.dev_attr.attr,
1494 &sensor_dev_attr_pwm2_auto_point4_temp.dev_attr.attr,
1495 NULL
1496 }, {
1497 &sensor_dev_attr_pwm3_auto_point1_pwm.dev_attr.attr,
1498 &sensor_dev_attr_pwm3_auto_point2_pwm.dev_attr.attr,
1499 &sensor_dev_attr_pwm3_auto_point3_pwm.dev_attr.attr,
1500 &sensor_dev_attr_pwm3_auto_point4_pwm.dev_attr.attr,
1501 &sensor_dev_attr_pwm3_auto_point1_temp.dev_attr.attr,
1502 &sensor_dev_attr_pwm3_auto_point1_temp_hyst.dev_attr.attr,
1503 &sensor_dev_attr_pwm3_auto_point2_temp.dev_attr.attr,
1504 &sensor_dev_attr_pwm3_auto_point3_temp.dev_attr.attr,
1505 &sensor_dev_attr_pwm3_auto_point4_temp.dev_attr.attr,
1506 NULL
1507 } };
1508
1509 static const struct attribute_group it87_group_autopwm[3] = {
1510 { .attrs = it87_attributes_autopwm[0] },
1511 { .attrs = it87_attributes_autopwm[1] },
1512 { .attrs = it87_attributes_autopwm[2] },
1513 };
1514
1515 static struct attribute *it87_attributes_fan_beep[] = {
1516 &sensor_dev_attr_fan1_beep.dev_attr.attr,
1517 &sensor_dev_attr_fan2_beep.dev_attr.attr,
1518 &sensor_dev_attr_fan3_beep.dev_attr.attr,
1519 &sensor_dev_attr_fan4_beep.dev_attr.attr,
1520 &sensor_dev_attr_fan5_beep.dev_attr.attr,
1521 };
1522
1523 static struct attribute *it87_attributes_vid[] = {
1524 &dev_attr_vrm.attr,
1525 &dev_attr_cpu0_vid.attr,
1526 NULL
1527 };
1528
1529 static const struct attribute_group it87_group_vid = {
1530 .attrs = it87_attributes_vid,
1531 };
1532
1533 static struct attribute *it87_attributes_label[] = {
1534 &sensor_dev_attr_in3_label.dev_attr.attr,
1535 &sensor_dev_attr_in7_label.dev_attr.attr,
1536 &sensor_dev_attr_in8_label.dev_attr.attr,
1537 NULL
1538 };
1539
1540 static const struct attribute_group it87_group_label = {
1541 .attrs = it87_attributes_vid,
1542 };
1543
1544 /* SuperIO detection - will change isa_address if a chip is found */
1545 static int __init it87_find(unsigned short *address,
1546 struct it87_sio_data *sio_data)
1547 {
1548 int err;
1549 u16 chip_type;
1550 const char *board_vendor, *board_name;
1551
1552 err = superio_enter();
1553 if (err)
1554 return err;
1555
1556 err = -ENODEV;
1557 chip_type = force_id ? force_id : superio_inw(DEVID);
1558
1559 switch (chip_type) {
1560 case IT8705F_DEVID:
1561 sio_data->type = it87;
1562 break;
1563 case IT8712F_DEVID:
1564 sio_data->type = it8712;
1565 break;
1566 case IT8716F_DEVID:
1567 case IT8726F_DEVID:
1568 sio_data->type = it8716;
1569 break;
1570 case IT8718F_DEVID:
1571 sio_data->type = it8718;
1572 break;
1573 case IT8720F_DEVID:
1574 sio_data->type = it8720;
1575 break;
1576 case IT8721F_DEVID:
1577 sio_data->type = it8721;
1578 break;
1579 case 0xffff: /* No device at all */
1580 goto exit;
1581 default:
1582 pr_debug("Unsupported chip (DEVID=0x%x)\n", chip_type);
1583 goto exit;
1584 }
1585
1586 superio_select(PME);
1587 if (!(superio_inb(IT87_ACT_REG) & 0x01)) {
1588 pr_info("Device not activated, skipping\n");
1589 goto exit;
1590 }
1591
1592 *address = superio_inw(IT87_BASE_REG) & ~(IT87_EXTENT - 1);
1593 if (*address == 0) {
1594 pr_info("Base address not set, skipping\n");
1595 goto exit;
1596 }
1597
1598 err = 0;
1599 sio_data->revision = superio_inb(DEVREV) & 0x0f;
1600 pr_info("Found IT%04xF chip at 0x%x, revision %d\n",
1601 chip_type, *address, sio_data->revision);
1602
1603 /* in8 (Vbat) is always internal */
1604 sio_data->internal = (1 << 2);
1605
1606 /* Read GPIO config and VID value from LDN 7 (GPIO) */
1607 if (sio_data->type == it87) {
1608 /* The IT8705F doesn't have VID pins at all */
1609 sio_data->skip_vid = 1;
1610
1611 /* The IT8705F has a different LD number for GPIO */
1612 superio_select(5);
1613 sio_data->beep_pin = superio_inb(IT87_SIO_BEEP_PIN_REG) & 0x3f;
1614 } else {
1615 int reg;
1616
1617 superio_select(GPIO);
1618
1619 reg = superio_inb(IT87_SIO_GPIO3_REG);
1620 if (sio_data->type == it8721) {
1621 /* The IT8721F/IT8758E doesn't have VID pins at all */
1622 sio_data->skip_vid = 1;
1623 } else {
1624 /* We need at least 4 VID pins */
1625 if (reg & 0x0f) {
1626 pr_info("VID is disabled (pins used for GPIO)\n");
1627 sio_data->skip_vid = 1;
1628 }
1629 }
1630
1631 /* Check if fan3 is there or not */
1632 if (reg & (1 << 6))
1633 sio_data->skip_pwm |= (1 << 2);
1634 if (reg & (1 << 7))
1635 sio_data->skip_fan |= (1 << 2);
1636
1637 /* Check if fan2 is there or not */
1638 reg = superio_inb(IT87_SIO_GPIO5_REG);
1639 if (reg & (1 << 1))
1640 sio_data->skip_pwm |= (1 << 1);
1641 if (reg & (1 << 2))
1642 sio_data->skip_fan |= (1 << 1);
1643
1644 if ((sio_data->type == it8718 || sio_data->type == it8720)
1645 && !(sio_data->skip_vid))
1646 sio_data->vid_value = superio_inb(IT87_SIO_VID_REG);
1647
1648 reg = superio_inb(IT87_SIO_PINX2_REG);
1649 /*
1650 * The IT8720F has no VIN7 pin, so VCCH should always be
1651 * routed internally to VIN7 with an internal divider.
1652 * Curiously, there still is a configuration bit to control
1653 * this, which means it can be set incorrectly. And even
1654 * more curiously, many boards out there are improperly
1655 * configured, even though the IT8720F datasheet claims
1656 * that the internal routing of VCCH to VIN7 is the default
1657 * setting. So we force the internal routing in this case.
1658 */
1659 if (sio_data->type == it8720 && !(reg & (1 << 1))) {
1660 reg |= (1 << 1);
1661 superio_outb(IT87_SIO_PINX2_REG, reg);
1662 pr_notice("Routing internal VCCH to in7\n");
1663 }
1664 if (reg & (1 << 0))
1665 sio_data->internal |= (1 << 0);
1666 if ((reg & (1 << 1)) || sio_data->type == it8721)
1667 sio_data->internal |= (1 << 1);
1668
1669 sio_data->beep_pin = superio_inb(IT87_SIO_BEEP_PIN_REG) & 0x3f;
1670 }
1671 if (sio_data->beep_pin)
1672 pr_info("Beeping is supported\n");
1673
1674 /* Disable specific features based on DMI strings */
1675 board_vendor = dmi_get_system_info(DMI_BOARD_VENDOR);
1676 board_name = dmi_get_system_info(DMI_BOARD_NAME);
1677 if (board_vendor && board_name) {
1678 if (strcmp(board_vendor, "nVIDIA") == 0
1679 && strcmp(board_name, "FN68PT") == 0) {
1680 /* On the Shuttle SN68PT, FAN_CTL2 is apparently not
1681 connected to a fan, but to something else. One user
1682 has reported instant system power-off when changing
1683 the PWM2 duty cycle, so we disable it.
1684 I use the board name string as the trigger in case
1685 the same board is ever used in other systems. */
1686 pr_info("Disabling pwm2 due to hardware constraints\n");
1687 sio_data->skip_pwm = (1 << 1);
1688 }
1689 }
1690
1691 exit:
1692 superio_exit();
1693 return err;
1694 }
1695
1696 static void it87_remove_files(struct device *dev)
1697 {
1698 struct it87_data *data = platform_get_drvdata(pdev);
1699 struct it87_sio_data *sio_data = dev->platform_data;
1700 const struct attribute_group *fan_group = it87_get_fan_group(data);
1701 int i;
1702
1703 sysfs_remove_group(&dev->kobj, &it87_group);
1704 if (sio_data->beep_pin)
1705 sysfs_remove_group(&dev->kobj, &it87_group_beep);
1706 for (i = 0; i < 5; i++) {
1707 if (!(data->has_fan & (1 << i)))
1708 continue;
1709 sysfs_remove_group(&dev->kobj, &fan_group[i]);
1710 if (sio_data->beep_pin)
1711 sysfs_remove_file(&dev->kobj,
1712 it87_attributes_fan_beep[i]);
1713 }
1714 for (i = 0; i < 3; i++) {
1715 if (sio_data->skip_pwm & (1 << 0))
1716 continue;
1717 sysfs_remove_group(&dev->kobj, &it87_group_pwm[i]);
1718 if (has_old_autopwm(data))
1719 sysfs_remove_group(&dev->kobj,
1720 &it87_group_autopwm[i]);
1721 }
1722 if (!sio_data->skip_vid)
1723 sysfs_remove_group(&dev->kobj, &it87_group_vid);
1724 sysfs_remove_group(&dev->kobj, &it87_group_label);
1725 }
1726
1727 static int __devinit it87_probe(struct platform_device *pdev)
1728 {
1729 struct it87_data *data;
1730 struct resource *res;
1731 struct device *dev = &pdev->dev;
1732 struct it87_sio_data *sio_data = dev->platform_data;
1733 const struct attribute_group *fan_group;
1734 int err = 0, i;
1735 int enable_pwm_interface;
1736 int fan_beep_need_rw;
1737 static const char *names[] = {
1738 "it87",
1739 "it8712",
1740 "it8716",
1741 "it8718",
1742 "it8720",
1743 "it8721",
1744 };
1745
1746 res = platform_get_resource(pdev, IORESOURCE_IO, 0);
1747 if (!request_region(res->start, IT87_EC_EXTENT, DRVNAME)) {
1748 dev_err(dev, "Failed to request region 0x%lx-0x%lx\n",
1749 (unsigned long)res->start,
1750 (unsigned long)(res->start + IT87_EC_EXTENT - 1));
1751 err = -EBUSY;
1752 goto ERROR0;
1753 }
1754
1755 data = kzalloc(sizeof(struct it87_data), GFP_KERNEL);
1756 if (!data) {
1757 err = -ENOMEM;
1758 goto ERROR1;
1759 }
1760
1761 data->addr = res->start;
1762 data->type = sio_data->type;
1763 data->revision = sio_data->revision;
1764 data->name = names[sio_data->type];
1765
1766 /* Now, we do the remaining detection. */
1767 if ((it87_read_value(data, IT87_REG_CONFIG) & 0x80)
1768 || it87_read_value(data, IT87_REG_CHIPID) != 0x90) {
1769 err = -ENODEV;
1770 goto ERROR2;
1771 }
1772
1773 platform_set_drvdata(pdev, data);
1774
1775 mutex_init(&data->update_lock);
1776
1777 /* Check PWM configuration */
1778 enable_pwm_interface = it87_check_pwm(dev);
1779
1780 /* Starting with IT8721F, we handle scaling of internal voltages */
1781 if (data->type == it8721) {
1782 if (sio_data->internal & (1 << 0))
1783 data->in_scaled |= (1 << 3); /* in3 is AVCC */
1784 if (sio_data->internal & (1 << 1))
1785 data->in_scaled |= (1 << 7); /* in7 is VSB */
1786 if (sio_data->internal & (1 << 2))
1787 data->in_scaled |= (1 << 8); /* in8 is Vbat */
1788 }
1789
1790 /* Initialize the IT87 chip */
1791 it87_init_device(pdev);
1792
1793 /* Register sysfs hooks */
1794 err = sysfs_create_group(&dev->kobj, &it87_group);
1795 if (err)
1796 goto ERROR2;
1797
1798 if (sio_data->beep_pin) {
1799 err = sysfs_create_group(&dev->kobj, &it87_group_beep);
1800 if (err)
1801 goto ERROR4;
1802 }
1803
1804 /* Do not create fan files for disabled fans */
1805 fan_group = it87_get_fan_group(data);
1806 fan_beep_need_rw = 1;
1807 for (i = 0; i < 5; i++) {
1808 if (!(data->has_fan & (1 << i)))
1809 continue;
1810 err = sysfs_create_group(&dev->kobj, &fan_group[i]);
1811 if (err)
1812 goto ERROR4;
1813
1814 if (sio_data->beep_pin) {
1815 err = sysfs_create_file(&dev->kobj,
1816 it87_attributes_fan_beep[i]);
1817 if (err)
1818 goto ERROR4;
1819 if (!fan_beep_need_rw)
1820 continue;
1821
1822 /* As we have a single beep enable bit for all fans,
1823 * only the first enabled fan has a writable attribute
1824 * for it. */
1825 if (sysfs_chmod_file(&dev->kobj,
1826 it87_attributes_fan_beep[i],
1827 S_IRUGO | S_IWUSR))
1828 dev_dbg(dev, "chmod +w fan%d_beep failed\n",
1829 i + 1);
1830 fan_beep_need_rw = 0;
1831 }
1832 }
1833
1834 if (enable_pwm_interface) {
1835 for (i = 0; i < 3; i++) {
1836 if (sio_data->skip_pwm & (1 << i))
1837 continue;
1838 err = sysfs_create_group(&dev->kobj,
1839 &it87_group_pwm[i]);
1840 if (err)
1841 goto ERROR4;
1842
1843 if (!has_old_autopwm(data))
1844 continue;
1845 err = sysfs_create_group(&dev->kobj,
1846 &it87_group_autopwm[i]);
1847 if (err)
1848 goto ERROR4;
1849 }
1850 }
1851
1852 if (!sio_data->skip_vid) {
1853 data->vrm = vid_which_vrm();
1854 /* VID reading from Super-I/O config space if available */
1855 data->vid = sio_data->vid_value;
1856 err = sysfs_create_group(&dev->kobj, &it87_group_vid);
1857 if (err)
1858 goto ERROR4;
1859 }
1860
1861 /* Export labels for internal sensors */
1862 for (i = 0; i < 3; i++) {
1863 if (!(sio_data->internal & (1 << i)))
1864 continue;
1865 err = sysfs_create_file(&dev->kobj,
1866 it87_attributes_label[i]);
1867 if (err)
1868 goto ERROR4;
1869 }
1870
1871 data->hwmon_dev = hwmon_device_register(dev);
1872 if (IS_ERR(data->hwmon_dev)) {
1873 err = PTR_ERR(data->hwmon_dev);
1874 goto ERROR4;
1875 }
1876
1877 return 0;
1878
1879 ERROR4:
1880 it87_remove_files(dev);
1881 ERROR2:
1882 platform_set_drvdata(pdev, NULL);
1883 kfree(data);
1884 ERROR1:
1885 release_region(res->start, IT87_EC_EXTENT);
1886 ERROR0:
1887 return err;
1888 }
1889
1890 static int __devexit it87_remove(struct platform_device *pdev)
1891 {
1892 struct it87_data *data = platform_get_drvdata(pdev);
1893
1894 hwmon_device_unregister(data->hwmon_dev);
1895 it87_remove_files(&pdev->dev);
1896
1897 release_region(data->addr, IT87_EC_EXTENT);
1898 platform_set_drvdata(pdev, NULL);
1899 kfree(data);
1900
1901 return 0;
1902 }
1903
1904 /* Must be called with data->update_lock held, except during initialization.
1905 We ignore the IT87 BUSY flag at this moment - it could lead to deadlocks,
1906 would slow down the IT87 access and should not be necessary. */
1907 static int it87_read_value(struct it87_data *data, u8 reg)
1908 {
1909 outb_p(reg, data->addr + IT87_ADDR_REG_OFFSET);
1910 return inb_p(data->addr + IT87_DATA_REG_OFFSET);
1911 }
1912
1913 /* Must be called with data->update_lock held, except during initialization.
1914 We ignore the IT87 BUSY flag at this moment - it could lead to deadlocks,
1915 would slow down the IT87 access and should not be necessary. */
1916 static void it87_write_value(struct it87_data *data, u8 reg, u8 value)
1917 {
1918 outb_p(reg, data->addr + IT87_ADDR_REG_OFFSET);
1919 outb_p(value, data->addr + IT87_DATA_REG_OFFSET);
1920 }
1921
1922 /* Return 1 if and only if the PWM interface is safe to use */
1923 static int __devinit it87_check_pwm(struct device *dev)
1924 {
1925 struct it87_data *data = dev_get_drvdata(dev);
1926 /* Some BIOSes fail to correctly configure the IT87 fans. All fans off
1927 * and polarity set to active low is sign that this is the case so we
1928 * disable pwm control to protect the user. */
1929 int tmp = it87_read_value(data, IT87_REG_FAN_CTL);
1930 if ((tmp & 0x87) == 0) {
1931 if (fix_pwm_polarity) {
1932 /* The user asks us to attempt a chip reconfiguration.
1933 * This means switching to active high polarity and
1934 * inverting all fan speed values. */
1935 int i;
1936 u8 pwm[3];
1937
1938 for (i = 0; i < 3; i++)
1939 pwm[i] = it87_read_value(data,
1940 IT87_REG_PWM(i));
1941
1942 /* If any fan is in automatic pwm mode, the polarity
1943 * might be correct, as suspicious as it seems, so we
1944 * better don't change anything (but still disable the
1945 * PWM interface). */
1946 if (!((pwm[0] | pwm[1] | pwm[2]) & 0x80)) {
1947 dev_info(dev, "Reconfiguring PWM to "
1948 "active high polarity\n");
1949 it87_write_value(data, IT87_REG_FAN_CTL,
1950 tmp | 0x87);
1951 for (i = 0; i < 3; i++)
1952 it87_write_value(data,
1953 IT87_REG_PWM(i),
1954 0x7f & ~pwm[i]);
1955 return 1;
1956 }
1957
1958 dev_info(dev, "PWM configuration is "
1959 "too broken to be fixed\n");
1960 }
1961
1962 dev_info(dev, "Detected broken BIOS "
1963 "defaults, disabling PWM interface\n");
1964 return 0;
1965 } else if (fix_pwm_polarity) {
1966 dev_info(dev, "PWM configuration looks "
1967 "sane, won't touch\n");
1968 }
1969
1970 return 1;
1971 }
1972
1973 /* Called when we have found a new IT87. */
1974 static void __devinit it87_init_device(struct platform_device *pdev)
1975 {
1976 struct it87_sio_data *sio_data = pdev->dev.platform_data;
1977 struct it87_data *data = platform_get_drvdata(pdev);
1978 int tmp, i;
1979 u8 mask;
1980
1981 /* For each PWM channel:
1982 * - If it is in automatic mode, setting to manual mode should set
1983 * the fan to full speed by default.
1984 * - If it is in manual mode, we need a mapping to temperature
1985 * channels to use when later setting to automatic mode later.
1986 * Use a 1:1 mapping by default (we are clueless.)
1987 * In both cases, the value can (and should) be changed by the user
1988 * prior to switching to a different mode.
1989 * Note that this is no longer needed for the IT8721F and later, as
1990 * these have separate registers for the temperature mapping and the
1991 * manual duty cycle. */
1992 for (i = 0; i < 3; i++) {
1993 data->pwm_temp_map[i] = i;
1994 data->pwm_duty[i] = 0x7f; /* Full speed */
1995 data->auto_pwm[i][3] = 0x7f; /* Full speed, hard-coded */
1996 }
1997
1998 /* Some chips seem to have default value 0xff for all limit
1999 * registers. For low voltage limits it makes no sense and triggers
2000 * alarms, so change to 0 instead. For high temperature limits, it
2001 * means -1 degree C, which surprisingly doesn't trigger an alarm,
2002 * but is still confusing, so change to 127 degrees C. */
2003 for (i = 0; i < 8; i++) {
2004 tmp = it87_read_value(data, IT87_REG_VIN_MIN(i));
2005 if (tmp == 0xff)
2006 it87_write_value(data, IT87_REG_VIN_MIN(i), 0);
2007 }
2008 for (i = 0; i < 3; i++) {
2009 tmp = it87_read_value(data, IT87_REG_TEMP_HIGH(i));
2010 if (tmp == 0xff)
2011 it87_write_value(data, IT87_REG_TEMP_HIGH(i), 127);
2012 }
2013
2014 /* Temperature channels are not forcibly enabled, as they can be
2015 * set to two different sensor types and we can't guess which one
2016 * is correct for a given system. These channels can be enabled at
2017 * run-time through the temp{1-3}_type sysfs accessors if needed. */
2018
2019 /* Check if voltage monitors are reset manually or by some reason */
2020 tmp = it87_read_value(data, IT87_REG_VIN_ENABLE);
2021 if ((tmp & 0xff) == 0) {
2022 /* Enable all voltage monitors */
2023 it87_write_value(data, IT87_REG_VIN_ENABLE, 0xff);
2024 }
2025
2026 /* Check if tachometers are reset manually or by some reason */
2027 mask = 0x70 & ~(sio_data->skip_fan << 4);
2028 data->fan_main_ctrl = it87_read_value(data, IT87_REG_FAN_MAIN_CTRL);
2029 if ((data->fan_main_ctrl & mask) == 0) {
2030 /* Enable all fan tachometers */
2031 data->fan_main_ctrl |= mask;
2032 it87_write_value(data, IT87_REG_FAN_MAIN_CTRL,
2033 data->fan_main_ctrl);
2034 }
2035 data->has_fan = (data->fan_main_ctrl >> 4) & 0x07;
2036
2037 /* Set tachometers to 16-bit mode if needed */
2038 if (has_16bit_fans(data)) {
2039 tmp = it87_read_value(data, IT87_REG_FAN_16BIT);
2040 if (~tmp & 0x07 & data->has_fan) {
2041 dev_dbg(&pdev->dev,
2042 "Setting fan1-3 to 16-bit mode\n");
2043 it87_write_value(data, IT87_REG_FAN_16BIT,
2044 tmp | 0x07);
2045 }
2046 /* IT8705F only supports three fans. */
2047 if (data->type != it87) {
2048 if (tmp & (1 << 4))
2049 data->has_fan |= (1 << 3); /* fan4 enabled */
2050 if (tmp & (1 << 5))
2051 data->has_fan |= (1 << 4); /* fan5 enabled */
2052 }
2053 }
2054
2055 /* Fan input pins may be used for alternative functions */
2056 data->has_fan &= ~sio_data->skip_fan;
2057
2058 /* Start monitoring */
2059 it87_write_value(data, IT87_REG_CONFIG,
2060 (it87_read_value(data, IT87_REG_CONFIG) & 0x36)
2061 | (update_vbat ? 0x41 : 0x01));
2062 }
2063
2064 static void it87_update_pwm_ctrl(struct it87_data *data, int nr)
2065 {
2066 data->pwm_ctrl[nr] = it87_read_value(data, IT87_REG_PWM(nr));
2067 if (data->type == it8721) {
2068 data->pwm_temp_map[nr] = data->pwm_ctrl[nr] & 0x03;
2069 data->pwm_duty[nr] = it87_read_value(data,
2070 IT87_REG_PWM_DUTY(nr));
2071 } else {
2072 if (data->pwm_ctrl[nr] & 0x80) /* Automatic mode */
2073 data->pwm_temp_map[nr] = data->pwm_ctrl[nr] & 0x03;
2074 else /* Manual mode */
2075 data->pwm_duty[nr] = data->pwm_ctrl[nr] & 0x7f;
2076 }
2077
2078 if (has_old_autopwm(data)) {
2079 int i;
2080
2081 for (i = 0; i < 5 ; i++)
2082 data->auto_temp[nr][i] = it87_read_value(data,
2083 IT87_REG_AUTO_TEMP(nr, i));
2084 for (i = 0; i < 3 ; i++)
2085 data->auto_pwm[nr][i] = it87_read_value(data,
2086 IT87_REG_AUTO_PWM(nr, i));
2087 }
2088 }
2089
2090 static struct it87_data *it87_update_device(struct device *dev)
2091 {
2092 struct it87_data *data = dev_get_drvdata(dev);
2093 int i;
2094
2095 mutex_lock(&data->update_lock);
2096
2097 if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
2098 || !data->valid) {
2099 if (update_vbat) {
2100 /* Cleared after each update, so reenable. Value
2101 returned by this read will be previous value */
2102 it87_write_value(data, IT87_REG_CONFIG,
2103 it87_read_value(data, IT87_REG_CONFIG) | 0x40);
2104 }
2105 for (i = 0; i <= 7; i++) {
2106 data->in[i] =
2107 it87_read_value(data, IT87_REG_VIN(i));
2108 data->in_min[i] =
2109 it87_read_value(data, IT87_REG_VIN_MIN(i));
2110 data->in_max[i] =
2111 it87_read_value(data, IT87_REG_VIN_MAX(i));
2112 }
2113 /* in8 (battery) has no limit registers */
2114 data->in[8] = it87_read_value(data, IT87_REG_VIN(8));
2115
2116 for (i = 0; i < 5; i++) {
2117 /* Skip disabled fans */
2118 if (!(data->has_fan & (1 << i)))
2119 continue;
2120
2121 data->fan_min[i] =
2122 it87_read_value(data, IT87_REG_FAN_MIN[i]);
2123 data->fan[i] = it87_read_value(data,
2124 IT87_REG_FAN[i]);
2125 /* Add high byte if in 16-bit mode */
2126 if (has_16bit_fans(data)) {
2127 data->fan[i] |= it87_read_value(data,
2128 IT87_REG_FANX[i]) << 8;
2129 data->fan_min[i] |= it87_read_value(data,
2130 IT87_REG_FANX_MIN[i]) << 8;
2131 }
2132 }
2133 for (i = 0; i < 3; i++) {
2134 data->temp[i] =
2135 it87_read_value(data, IT87_REG_TEMP(i));
2136 data->temp_high[i] =
2137 it87_read_value(data, IT87_REG_TEMP_HIGH(i));
2138 data->temp_low[i] =
2139 it87_read_value(data, IT87_REG_TEMP_LOW(i));
2140 }
2141
2142 /* Newer chips don't have clock dividers */
2143 if ((data->has_fan & 0x07) && !has_16bit_fans(data)) {
2144 i = it87_read_value(data, IT87_REG_FAN_DIV);
2145 data->fan_div[0] = i & 0x07;
2146 data->fan_div[1] = (i >> 3) & 0x07;
2147 data->fan_div[2] = (i & 0x40) ? 3 : 1;
2148 }
2149
2150 data->alarms =
2151 it87_read_value(data, IT87_REG_ALARM1) |
2152 (it87_read_value(data, IT87_REG_ALARM2) << 8) |
2153 (it87_read_value(data, IT87_REG_ALARM3) << 16);
2154 data->beeps = it87_read_value(data, IT87_REG_BEEP_ENABLE);
2155
2156 data->fan_main_ctrl = it87_read_value(data,
2157 IT87_REG_FAN_MAIN_CTRL);
2158 data->fan_ctl = it87_read_value(data, IT87_REG_FAN_CTL);
2159 for (i = 0; i < 3; i++)
2160 it87_update_pwm_ctrl(data, i);
2161
2162 data->sensor = it87_read_value(data, IT87_REG_TEMP_ENABLE);
2163 /* The 8705 does not have VID capability.
2164 The 8718 and later don't use IT87_REG_VID for the
2165 same purpose. */
2166 if (data->type == it8712 || data->type == it8716) {
2167 data->vid = it87_read_value(data, IT87_REG_VID);
2168 /* The older IT8712F revisions had only 5 VID pins,
2169 but we assume it is always safe to read 6 bits. */
2170 data->vid &= 0x3f;
2171 }
2172 data->last_updated = jiffies;
2173 data->valid = 1;
2174 }
2175
2176 mutex_unlock(&data->update_lock);
2177
2178 return data;
2179 }
2180
2181 static int __init it87_device_add(unsigned short address,
2182 const struct it87_sio_data *sio_data)
2183 {
2184 struct resource res = {
2185 .start = address + IT87_EC_OFFSET,
2186 .end = address + IT87_EC_OFFSET + IT87_EC_EXTENT - 1,
2187 .name = DRVNAME,
2188 .flags = IORESOURCE_IO,
2189 };
2190 int err;
2191
2192 err = acpi_check_resource_conflict(&res);
2193 if (err)
2194 goto exit;
2195
2196 pdev = platform_device_alloc(DRVNAME, address);
2197 if (!pdev) {
2198 err = -ENOMEM;
2199 pr_err("Device allocation failed\n");
2200 goto exit;
2201 }
2202
2203 err = platform_device_add_resources(pdev, &res, 1);
2204 if (err) {
2205 pr_err("Device resource addition failed (%d)\n", err);
2206 goto exit_device_put;
2207 }
2208
2209 err = platform_device_add_data(pdev, sio_data,
2210 sizeof(struct it87_sio_data));
2211 if (err) {
2212 pr_err("Platform data allocation failed\n");
2213 goto exit_device_put;
2214 }
2215
2216 err = platform_device_add(pdev);
2217 if (err) {
2218 pr_err("Device addition failed (%d)\n", err);
2219 goto exit_device_put;
2220 }
2221
2222 return 0;
2223
2224 exit_device_put:
2225 platform_device_put(pdev);
2226 exit:
2227 return err;
2228 }
2229
2230 static int __init sm_it87_init(void)
2231 {
2232 int err;
2233 unsigned short isa_address = 0;
2234 struct it87_sio_data sio_data;
2235
2236 memset(&sio_data, 0, sizeof(struct it87_sio_data));
2237 err = it87_find(&isa_address, &sio_data);
2238 if (err)
2239 return err;
2240 err = platform_driver_register(&it87_driver);
2241 if (err)
2242 return err;
2243
2244 err = it87_device_add(isa_address, &sio_data);
2245 if (err) {
2246 platform_driver_unregister(&it87_driver);
2247 return err;
2248 }
2249
2250 return 0;
2251 }
2252
2253 static void __exit sm_it87_exit(void)
2254 {
2255 platform_device_unregister(pdev);
2256 platform_driver_unregister(&it87_driver);
2257 }
2258
2259
2260 MODULE_AUTHOR("Chris Gauthron, "
2261 "Jean Delvare <khali@linux-fr.org>");
2262 MODULE_DESCRIPTION("IT8705F/IT871xF/IT872xF hardware monitoring driver");
2263 module_param(update_vbat, bool, 0);
2264 MODULE_PARM_DESC(update_vbat, "Update vbat if set else return powerup value");
2265 module_param(fix_pwm_polarity, bool, 0);
2266 MODULE_PARM_DESC(fix_pwm_polarity,
2267 "Force PWM polarity to active high (DANGEROUS)");
2268 MODULE_LICENSE("GPL");
2269
2270 module_init(sm_it87_init);
2271 module_exit(sm_it87_exit);
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree