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si4713-i2c: avoid potential buffer overflow on si4713
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / hwmon / it87.c
blob316b64823f7b39b805823e606453e244a32d3bae
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
81 superio_inb(int reg)
82 {
83 outb(reg, REG);
84 return inb(VAL);
85 }
86
87 static inline void
88 superio_outb(int reg, int val)
89 {
90 outb(reg, REG);
91 outb(val, VAL);
92 }
93
94 static int superio_inw(int reg)
95 {
96 int val;
97 outb(reg++, REG);
98 val = inb(VAL) << 8;
99 outb(reg, REG);
100 val |= inb(VAL);
101 return val;
102 }
103
104 static inline void
105 superio_select(int ldn)
106 {
107 outb(DEV, REG);
108 outb(ldn, VAL);
109 }
110
111 static inline void
112 superio_enter(void)
113 {
114 outb(0x87, REG);
115 outb(0x01, REG);
116 outb(0x55, REG);
117 outb(0x55, REG);
118 }
119
120 static inline void
121 superio_exit(void)
122 {
123 outb(0x02, REG);
124 outb(0x02, VAL);
125 }
126
127 /* Logical device 4 registers */
128 #define IT8712F_DEVID 0x8712
129 #define IT8705F_DEVID 0x8705
130 #define IT8716F_DEVID 0x8716
131 #define IT8718F_DEVID 0x8718
132 #define IT8720F_DEVID 0x8720
133 #define IT8721F_DEVID 0x8721
134 #define IT8726F_DEVID 0x8726
135 #define IT87_ACT_REG 0x30
136 #define IT87_BASE_REG 0x60
137
138 /* Logical device 7 registers (IT8712F and later) */
139 #define IT87_SIO_GPIO3_REG 0x27
140 #define IT87_SIO_GPIO5_REG 0x29
141 #define IT87_SIO_PINX2_REG 0x2c /* Pin selection */
142 #define IT87_SIO_VID_REG 0xfc /* VID value */
143 #define IT87_SIO_BEEP_PIN_REG 0xf6 /* Beep pin mapping */
144
145 /* Update battery voltage after every reading if true */
146 static int update_vbat;
147
148 /* Not all BIOSes properly configure the PWM registers */
149 static int fix_pwm_polarity;
150
151 /* Many IT87 constants specified below */
152
153 /* Length of ISA address segment */
154 #define IT87_EXTENT 8
155
156 /* Length of ISA address segment for Environmental Controller */
157 #define IT87_EC_EXTENT 2
158
159 /* Offset of EC registers from ISA base address */
160 #define IT87_EC_OFFSET 5
161
162 /* Where are the ISA address/data registers relative to the EC base address */
163 #define IT87_ADDR_REG_OFFSET 0
164 #define IT87_DATA_REG_OFFSET 1
165
166 /*----- The IT87 registers -----*/
167
168 #define IT87_REG_CONFIG 0x00
169
170 #define IT87_REG_ALARM1 0x01
171 #define IT87_REG_ALARM2 0x02
172 #define IT87_REG_ALARM3 0x03
173
174 /* The IT8718F and IT8720F have the VID value in a different register, in
175 Super-I/O configuration space. */
176 #define IT87_REG_VID 0x0a
177 /* The IT8705F and IT8712F earlier than revision 0x08 use register 0x0b
178 for fan divisors. Later IT8712F revisions must use 16-bit tachometer
179 mode. */
180 #define IT87_REG_FAN_DIV 0x0b
181 #define IT87_REG_FAN_16BIT 0x0c
182
183 /* Monitors: 9 voltage (0 to 7, battery), 3 temp (1 to 3), 3 fan (1 to 3) */
184
185 static const u8 IT87_REG_FAN[] = { 0x0d, 0x0e, 0x0f, 0x80, 0x82 };
186 static const u8 IT87_REG_FAN_MIN[] = { 0x10, 0x11, 0x12, 0x84, 0x86 };
187 static const u8 IT87_REG_FANX[] = { 0x18, 0x19, 0x1a, 0x81, 0x83 };
188 static const u8 IT87_REG_FANX_MIN[] = { 0x1b, 0x1c, 0x1d, 0x85, 0x87 };
189 #define IT87_REG_FAN_MAIN_CTRL 0x13
190 #define IT87_REG_FAN_CTL 0x14
191 #define IT87_REG_PWM(nr) (0x15 + (nr))
192 #define IT87_REG_PWM_DUTY(nr) (0x63 + (nr) * 8)
193
194 #define IT87_REG_VIN(nr) (0x20 + (nr))
195 #define IT87_REG_TEMP(nr) (0x29 + (nr))
196
197 #define IT87_REG_VIN_MAX(nr) (0x30 + (nr) * 2)
198 #define IT87_REG_VIN_MIN(nr) (0x31 + (nr) * 2)
199 #define IT87_REG_TEMP_HIGH(nr) (0x40 + (nr) * 2)
200 #define IT87_REG_TEMP_LOW(nr) (0x41 + (nr) * 2)
201
202 #define IT87_REG_VIN_ENABLE 0x50
203 #define IT87_REG_TEMP_ENABLE 0x51
204 #define IT87_REG_BEEP_ENABLE 0x5c
205
206 #define IT87_REG_CHIPID 0x58
207
208 #define IT87_REG_AUTO_TEMP(nr, i) (0x60 + (nr) * 8 + (i))
209 #define IT87_REG_AUTO_PWM(nr, i) (0x65 + (nr) * 8 + (i))
210
211
212 struct it87_sio_data {
213 enum chips type;
214 /* Values read from Super-I/O config space */
215 u8 revision;
216 u8 vid_value;
217 u8 beep_pin;
218 u8 internal; /* Internal sensors can be labeled */
219 /* Features skipped based on config or DMI */
220 u8 skip_vid;
221 u8 skip_fan;
222 u8 skip_pwm;
223 };
224
225 /* For each registered chip, we need to keep some data in memory.
226 The structure is dynamically allocated. */
227 struct it87_data {
228 struct device *hwmon_dev;
229 enum chips type;
230 u8 revision;
231
232 unsigned short addr;
233 const char *name;
234 struct mutex update_lock;
235 char valid; /* !=0 if following fields are valid */
236 unsigned long last_updated; /* In jiffies */
237
238 u16 in_scaled; /* Internal voltage sensors are scaled */
239 u8 in[9]; /* Register value */
240 u8 in_max[8]; /* Register value */
241 u8 in_min[8]; /* Register value */
242 u8 has_fan; /* Bitfield, fans enabled */
243 u16 fan[5]; /* Register values, possibly combined */
244 u16 fan_min[5]; /* Register values, possibly combined */
245 s8 temp[3]; /* Register value */
246 s8 temp_high[3]; /* Register value */
247 s8 temp_low[3]; /* Register value */
248 u8 sensor; /* Register value */
249 u8 fan_div[3]; /* Register encoding, shifted right */
250 u8 vid; /* Register encoding, combined */
251 u8 vrm;
252 u32 alarms; /* Register encoding, combined */
253 u8 beeps; /* Register encoding */
254 u8 fan_main_ctrl; /* Register value */
255 u8 fan_ctl; /* Register value */
256
257 /* The following 3 arrays correspond to the same registers up to
258 * the IT8720F. The meaning of bits 6-0 depends on the value of bit
259 * 7, and we want to preserve settings on mode changes, so we have
260 * to track all values separately.
261 * Starting with the IT8721F, the manual PWM duty cycles are stored
262 * in separate registers (8-bit values), so the separate tracking
263 * is no longer needed, but it is still done to keep the driver
264 * simple. */
265 u8 pwm_ctrl[3]; /* Register value */
266 u8 pwm_duty[3]; /* Manual PWM value set by user */
267 u8 pwm_temp_map[3]; /* PWM to temp. chan. mapping (bits 1-0) */
268
269 /* Automatic fan speed control registers */
270 u8 auto_pwm[3][4]; /* [nr][3] is hard-coded */
271 s8 auto_temp[3][5]; /* [nr][0] is point1_temp_hyst */
272 };
273
274 static u8 in_to_reg(const struct it87_data *data, int nr, long val)
275 {
276 long lsb;
277
278 if (data->type == it8721) {
279 if (data->in_scaled & (1 << nr))
280 lsb = 24;
281 else
282 lsb = 12;
283 } else
284 lsb = 16;
285
286 val = DIV_ROUND_CLOSEST(val, lsb);
287 return SENSORS_LIMIT(val, 0, 255);
288 }
289
290 static int in_from_reg(const struct it87_data *data, int nr, int val)
291 {
292 if (data->type == it8721) {
293 if (data->in_scaled & (1 << nr))
294 return val * 24;
295 else
296 return val * 12;
297 } else
298 return val * 16;
299 }
300
301 static inline u8 FAN_TO_REG(long rpm, int div)
302 {
303 if (rpm == 0)
304 return 255;
305 rpm = SENSORS_LIMIT(rpm, 1, 1000000);
306 return SENSORS_LIMIT((1350000 + rpm * div / 2) / (rpm * div), 1,
307 254);
308 }
309
310 static inline u16 FAN16_TO_REG(long rpm)
311 {
312 if (rpm == 0)
313 return 0xffff;
314 return SENSORS_LIMIT((1350000 + rpm) / (rpm * 2), 1, 0xfffe);
315 }
316
317 #define FAN_FROM_REG(val, div) ((val) == 0 ? -1 : (val) == 255 ? 0 : \
318 1350000 / ((val) * (div)))
319 /* The divider is fixed to 2 in 16-bit mode */
320 #define FAN16_FROM_REG(val) ((val) == 0 ? -1 : (val) == 0xffff ? 0 : \
321 1350000 / ((val) * 2))
322
323 #define TEMP_TO_REG(val) (SENSORS_LIMIT(((val) < 0 ? (((val) - 500) / 1000) : \
324 ((val) + 500) / 1000), -128, 127))
325 #define TEMP_FROM_REG(val) ((val) * 1000)
326
327 static u8 pwm_to_reg(const struct it87_data *data, long val)
328 {
329 if (data->type == it8721)
330 return val;
331 else
332 return val >> 1;
333 }
334
335 static int pwm_from_reg(const struct it87_data *data, u8 reg)
336 {
337 if (data->type == it8721)
338 return reg;
339 else
340 return (reg & 0x7f) << 1;
341 }
342
343
344 static int DIV_TO_REG(int val)
345 {
346 int answer = 0;
347 while (answer < 7 && (val >>= 1))
348 answer++;
349 return answer;
350 }
351 #define DIV_FROM_REG(val) (1 << (val))
352
353 static const unsigned int pwm_freq[8] = {
354 48000000 / 128,
355 24000000 / 128,
356 12000000 / 128,
357 8000000 / 128,
358 6000000 / 128,
359 3000000 / 128,
360 1500000 / 128,
361 750000 / 128,
362 };
363
364 static inline int has_16bit_fans(const struct it87_data *data)
365 {
366 /* IT8705F Datasheet 0.4.1, 3h == Version G.
367 IT8712F Datasheet 0.9.1, section 8.3.5 indicates 8h == Version J.
368 These are the first revisions with 16bit tachometer support. */
369 return (data->type == it87 && data->revision >= 0x03)
370 || (data->type == it8712 && data->revision >= 0x08)
371 || data->type == it8716
372 || data->type == it8718
373 || data->type == it8720
374 || data->type == it8721;
375 }
376
377 static inline int has_old_autopwm(const struct it87_data *data)
378 {
379 /* The old automatic fan speed control interface is implemented
380 by IT8705F chips up to revision F and IT8712F chips up to
381 revision G. */
382 return (data->type == it87 && data->revision < 0x03)
383 || (data->type == it8712 && data->revision < 0x08);
384 }
385
386 static int it87_probe(struct platform_device *pdev);
387 static int __devexit it87_remove(struct platform_device *pdev);
388
389 static int it87_read_value(struct it87_data *data, u8 reg);
390 static void it87_write_value(struct it87_data *data, u8 reg, u8 value);
391 static struct it87_data *it87_update_device(struct device *dev);
392 static int it87_check_pwm(struct device *dev);
393 static void it87_init_device(struct platform_device *pdev);
394
395
396 static struct platform_driver it87_driver = {
397 .driver = {
398 .owner = THIS_MODULE,
399 .name = DRVNAME,
400 },
401 .probe = it87_probe,
402 .remove = __devexit_p(it87_remove),
403 };
404
405 static ssize_t show_in(struct device *dev, struct device_attribute *attr,
406 char *buf)
407 {
408 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
409 int nr = sensor_attr->index;
410
411 struct it87_data *data = it87_update_device(dev);
412 return sprintf(buf, "%d\n", in_from_reg(data, nr, data->in[nr]));
413 }
414
415 static ssize_t show_in_min(struct device *dev, struct device_attribute *attr,
416 char *buf)
417 {
418 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
419 int nr = sensor_attr->index;
420
421 struct it87_data *data = it87_update_device(dev);
422 return sprintf(buf, "%d\n", in_from_reg(data, nr, data->in_min[nr]));
423 }
424
425 static ssize_t show_in_max(struct device *dev, struct device_attribute *attr,
426 char *buf)
427 {
428 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
429 int nr = sensor_attr->index;
430
431 struct it87_data *data = it87_update_device(dev);
432 return sprintf(buf, "%d\n", in_from_reg(data, nr, data->in_max[nr]));
433 }
434
435 static ssize_t set_in_min(struct device *dev, struct device_attribute *attr,
436 const char *buf, size_t count)
437 {
438 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
439 int nr = sensor_attr->index;
440
441 struct it87_data *data = dev_get_drvdata(dev);
442 unsigned long val;
443
444 if (strict_strtoul(buf, 10, &val) < 0)
445 return -EINVAL;
446
447 mutex_lock(&data->update_lock);
448 data->in_min[nr] = in_to_reg(data, nr, val);
449 it87_write_value(data, IT87_REG_VIN_MIN(nr),
450 data->in_min[nr]);
451 mutex_unlock(&data->update_lock);
452 return count;
453 }
454 static ssize_t set_in_max(struct device *dev, struct device_attribute *attr,
455 const char *buf, size_t count)
456 {
457 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
458 int nr = sensor_attr->index;
459
460 struct it87_data *data = dev_get_drvdata(dev);
461 unsigned long val;
462
463 if (strict_strtoul(buf, 10, &val) < 0)
464 return -EINVAL;
465
466 mutex_lock(&data->update_lock);
467 data->in_max[nr] = in_to_reg(data, nr, val);
468 it87_write_value(data, IT87_REG_VIN_MAX(nr),
469 data->in_max[nr]);
470 mutex_unlock(&data->update_lock);
471 return count;
472 }
473
474 #define show_in_offset(offset) \
475 static SENSOR_DEVICE_ATTR(in##offset##_input, S_IRUGO, \
476 show_in, NULL, offset);
477
478 #define limit_in_offset(offset) \
479 static SENSOR_DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \
480 show_in_min, set_in_min, offset); \
481 static SENSOR_DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \
482 show_in_max, set_in_max, offset);
483
484 show_in_offset(0);
485 limit_in_offset(0);
486 show_in_offset(1);
487 limit_in_offset(1);
488 show_in_offset(2);
489 limit_in_offset(2);
490 show_in_offset(3);
491 limit_in_offset(3);
492 show_in_offset(4);
493 limit_in_offset(4);
494 show_in_offset(5);
495 limit_in_offset(5);
496 show_in_offset(6);
497 limit_in_offset(6);
498 show_in_offset(7);
499 limit_in_offset(7);
500 show_in_offset(8);
501
502 /* 3 temperatures */
503 static ssize_t show_temp(struct device *dev, struct device_attribute *attr,
504 char *buf)
505 {
506 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
507 int nr = sensor_attr->index;
508
509 struct it87_data *data = it87_update_device(dev);
510 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[nr]));
511 }
512 static ssize_t show_temp_max(struct device *dev, struct device_attribute *attr,
513 char *buf)
514 {
515 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
516 int nr = sensor_attr->index;
517
518 struct it87_data *data = it87_update_device(dev);
519 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_high[nr]));
520 }
521 static ssize_t show_temp_min(struct device *dev, struct device_attribute *attr,
522 char *buf)
523 {
524 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
525 int nr = sensor_attr->index;
526
527 struct it87_data *data = it87_update_device(dev);
528 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_low[nr]));
529 }
530 static ssize_t set_temp_max(struct device *dev, struct device_attribute *attr,
531 const char *buf, size_t count)
532 {
533 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
534 int nr = sensor_attr->index;
535
536 struct it87_data *data = dev_get_drvdata(dev);
537 long val;
538
539 if (strict_strtol(buf, 10, &val) < 0)
540 return -EINVAL;
541
542 mutex_lock(&data->update_lock);
543 data->temp_high[nr] = TEMP_TO_REG(val);
544 it87_write_value(data, IT87_REG_TEMP_HIGH(nr), data->temp_high[nr]);
545 mutex_unlock(&data->update_lock);
546 return count;
547 }
548 static ssize_t set_temp_min(struct device *dev, struct device_attribute *attr,
549 const char *buf, size_t count)
550 {
551 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
552 int nr = sensor_attr->index;
553
554 struct it87_data *data = dev_get_drvdata(dev);
555 long val;
556
557 if (strict_strtol(buf, 10, &val) < 0)
558 return -EINVAL;
559
560 mutex_lock(&data->update_lock);
561 data->temp_low[nr] = TEMP_TO_REG(val);
562 it87_write_value(data, IT87_REG_TEMP_LOW(nr), data->temp_low[nr]);
563 mutex_unlock(&data->update_lock);
564 return count;
565 }
566 #define show_temp_offset(offset) \
567 static SENSOR_DEVICE_ATTR(temp##offset##_input, S_IRUGO, \
568 show_temp, NULL, offset - 1); \
569 static SENSOR_DEVICE_ATTR(temp##offset##_max, S_IRUGO | S_IWUSR, \
570 show_temp_max, set_temp_max, offset - 1); \
571 static SENSOR_DEVICE_ATTR(temp##offset##_min, S_IRUGO | S_IWUSR, \
572 show_temp_min, set_temp_min, offset - 1);
573
574 show_temp_offset(1);
575 show_temp_offset(2);
576 show_temp_offset(3);
577
578 static ssize_t show_sensor(struct device *dev, struct device_attribute *attr,
579 char *buf)
580 {
581 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
582 int nr = sensor_attr->index;
583
584 struct it87_data *data = it87_update_device(dev);
585 u8 reg = data->sensor; /* In case the value is updated while
586 we use it */
587
588 if (reg & (1 << nr))
589 return sprintf(buf, "3\n"); /* thermal diode */
590 if (reg & (8 << nr))
591 return sprintf(buf, "4\n"); /* thermistor */
592 return sprintf(buf, "0\n"); /* disabled */
593 }
594 static ssize_t set_sensor(struct device *dev, struct device_attribute *attr,
595 const char *buf, size_t count)
596 {
597 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
598 int nr = sensor_attr->index;
599
600 struct it87_data *data = dev_get_drvdata(dev);
601 long val;
602 u8 reg;
603
604 if (strict_strtol(buf, 10, &val) < 0)
605 return -EINVAL;
606
607 reg = it87_read_value(data, IT87_REG_TEMP_ENABLE);
608 reg &= ~(1 << nr);
609 reg &= ~(8 << nr);
610 if (val == 2) { /* backwards compatibility */
611 dev_warn(dev, "Sensor type 2 is deprecated, please use 4 "
612 "instead\n");
613 val = 4;
614 }
615 /* 3 = thermal diode; 4 = thermistor; 0 = disabled */
616 if (val == 3)
617 reg |= 1 << nr;
618 else if (val == 4)
619 reg |= 8 << nr;
620 else if (val != 0)
621 return -EINVAL;
622
623 mutex_lock(&data->update_lock);
624 data->sensor = reg;
625 it87_write_value(data, IT87_REG_TEMP_ENABLE, data->sensor);
626 data->valid = 0; /* Force cache refresh */
627 mutex_unlock(&data->update_lock);
628 return count;
629 }
630 #define show_sensor_offset(offset) \
631 static SENSOR_DEVICE_ATTR(temp##offset##_type, S_IRUGO | S_IWUSR, \
632 show_sensor, set_sensor, offset - 1);
633
634 show_sensor_offset(1);
635 show_sensor_offset(2);
636 show_sensor_offset(3);
637
638 /* 3 Fans */
639
640 static int pwm_mode(const struct it87_data *data, int nr)
641 {
642 int ctrl = data->fan_main_ctrl & (1 << nr);
643
644 if (ctrl == 0) /* Full speed */
645 return 0;
646 if (data->pwm_ctrl[nr] & 0x80) /* Automatic mode */
647 return 2;
648 else /* Manual mode */
649 return 1;
650 }
651
652 static ssize_t show_fan(struct device *dev, struct device_attribute *attr,
653 char *buf)
654 {
655 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
656 int nr = sensor_attr->index;
657
658 struct it87_data *data = it87_update_device(dev);
659 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[nr],
660 DIV_FROM_REG(data->fan_div[nr])));
661 }
662 static ssize_t show_fan_min(struct device *dev, struct device_attribute *attr,
663 char *buf)
664 {
665 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
666 int nr = sensor_attr->index;
667
668 struct it87_data *data = it87_update_device(dev);
669 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[nr],
670 DIV_FROM_REG(data->fan_div[nr])));
671 }
672 static ssize_t show_fan_div(struct device *dev, struct device_attribute *attr,
673 char *buf)
674 {
675 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
676 int nr = sensor_attr->index;
677
678 struct it87_data *data = it87_update_device(dev);
679 return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr]));
680 }
681 static ssize_t show_pwm_enable(struct device *dev,
682 struct device_attribute *attr, char *buf)
683 {
684 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
685 int nr = sensor_attr->index;
686
687 struct it87_data *data = it87_update_device(dev);
688 return sprintf(buf, "%d\n", pwm_mode(data, nr));
689 }
690 static ssize_t show_pwm(struct device *dev, struct device_attribute *attr,
691 char *buf)
692 {
693 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
694 int nr = sensor_attr->index;
695
696 struct it87_data *data = it87_update_device(dev);
697 return sprintf(buf, "%d\n",
698 pwm_from_reg(data, data->pwm_duty[nr]));
699 }
700 static ssize_t show_pwm_freq(struct device *dev, struct device_attribute *attr,
701 char *buf)
702 {
703 struct it87_data *data = it87_update_device(dev);
704 int index = (data->fan_ctl >> 4) & 0x07;
705
706 return sprintf(buf, "%u\n", pwm_freq[index]);
707 }
708 static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr,
709 const char *buf, size_t count)
710 {
711 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
712 int nr = sensor_attr->index;
713
714 struct it87_data *data = dev_get_drvdata(dev);
715 long val;
716 u8 reg;
717
718 if (strict_strtol(buf, 10, &val) < 0)
719 return -EINVAL;
720
721 mutex_lock(&data->update_lock);
722 reg = it87_read_value(data, IT87_REG_FAN_DIV);
723 switch (nr) {
724 case 0:
725 data->fan_div[nr] = reg & 0x07;
726 break;
727 case 1:
728 data->fan_div[nr] = (reg >> 3) & 0x07;
729 break;
730 case 2:
731 data->fan_div[nr] = (reg & 0x40) ? 3 : 1;
732 break;
733 }
734
735 data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr]));
736 it87_write_value(data, IT87_REG_FAN_MIN[nr], data->fan_min[nr]);
737 mutex_unlock(&data->update_lock);
738 return count;
739 }
740 static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr,
741 const char *buf, size_t count)
742 {
743 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
744 int nr = sensor_attr->index;
745
746 struct it87_data *data = dev_get_drvdata(dev);
747 unsigned long val;
748 int min;
749 u8 old;
750
751 if (strict_strtoul(buf, 10, &val) < 0)
752 return -EINVAL;
753
754 mutex_lock(&data->update_lock);
755 old = it87_read_value(data, IT87_REG_FAN_DIV);
756
757 /* Save fan min limit */
758 min = FAN_FROM_REG(data->fan_min[nr], DIV_FROM_REG(data->fan_div[nr]));
759
760 switch (nr) {
761 case 0:
762 case 1:
763 data->fan_div[nr] = DIV_TO_REG(val);
764 break;
765 case 2:
766 if (val < 8)
767 data->fan_div[nr] = 1;
768 else
769 data->fan_div[nr] = 3;
770 }
771 val = old & 0x80;
772 val |= (data->fan_div[0] & 0x07);
773 val |= (data->fan_div[1] & 0x07) << 3;
774 if (data->fan_div[2] == 3)
775 val |= 0x1 << 6;
776 it87_write_value(data, IT87_REG_FAN_DIV, val);
777
778 /* Restore fan min limit */
779 data->fan_min[nr] = FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr]));
780 it87_write_value(data, IT87_REG_FAN_MIN[nr], data->fan_min[nr]);
781
782 mutex_unlock(&data->update_lock);
783 return count;
784 }
785
786 /* Returns 0 if OK, -EINVAL otherwise */
787 static int check_trip_points(struct device *dev, int nr)
788 {
789 const struct it87_data *data = dev_get_drvdata(dev);
790 int i, err = 0;
791
792 if (has_old_autopwm(data)) {
793 for (i = 0; i < 3; i++) {
794 if (data->auto_temp[nr][i] > data->auto_temp[nr][i + 1])
795 err = -EINVAL;
796 }
797 for (i = 0; i < 2; i++) {
798 if (data->auto_pwm[nr][i] > data->auto_pwm[nr][i + 1])
799 err = -EINVAL;
800 }
801 }
802
803 if (err) {
804 dev_err(dev, "Inconsistent trip points, not switching to "
805 "automatic mode\n");
806 dev_err(dev, "Adjust the trip points and try again\n");
807 }
808 return err;
809 }
810
811 static ssize_t set_pwm_enable(struct device *dev,
812 struct device_attribute *attr, const char *buf, size_t count)
813 {
814 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
815 int nr = sensor_attr->index;
816
817 struct it87_data *data = dev_get_drvdata(dev);
818 long val;
819
820 if (strict_strtol(buf, 10, &val) < 0 || val < 0 || val > 2)
821 return -EINVAL;
822
823 /* Check trip points before switching to automatic mode */
824 if (val == 2) {
825 if (check_trip_points(dev, nr) < 0)
826 return -EINVAL;
827 }
828
829 mutex_lock(&data->update_lock);
830
831 if (val == 0) {
832 int tmp;
833 /* make sure the fan is on when in on/off mode */
834 tmp = it87_read_value(data, IT87_REG_FAN_CTL);
835 it87_write_value(data, IT87_REG_FAN_CTL, tmp | (1 << nr));
836 /* set on/off mode */
837 data->fan_main_ctrl &= ~(1 << nr);
838 it87_write_value(data, IT87_REG_FAN_MAIN_CTRL,
839 data->fan_main_ctrl);
840 } else {
841 if (val == 1) /* Manual mode */
842 data->pwm_ctrl[nr] = data->type == it8721 ?
843 data->pwm_temp_map[nr] :
844 data->pwm_duty[nr];
845 else /* Automatic mode */
846 data->pwm_ctrl[nr] = 0x80 | data->pwm_temp_map[nr];
847 it87_write_value(data, IT87_REG_PWM(nr), data->pwm_ctrl[nr]);
848 /* set SmartGuardian mode */
849 data->fan_main_ctrl |= (1 << nr);
850 it87_write_value(data, IT87_REG_FAN_MAIN_CTRL,
851 data->fan_main_ctrl);
852 }
853
854 mutex_unlock(&data->update_lock);
855 return count;
856 }
857 static ssize_t set_pwm(struct device *dev, struct device_attribute *attr,
858 const char *buf, size_t count)
859 {
860 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
861 int nr = sensor_attr->index;
862
863 struct it87_data *data = dev_get_drvdata(dev);
864 long val;
865
866 if (strict_strtol(buf, 10, &val) < 0 || val < 0 || val > 255)
867 return -EINVAL;
868
869 mutex_lock(&data->update_lock);
870 if (data->type == it8721) {
871 /* If we are in automatic mode, the PWM duty cycle register
872 * is read-only so we can't write the value */
873 if (data->pwm_ctrl[nr] & 0x80) {
874 mutex_unlock(&data->update_lock);
875 return -EBUSY;
876 }
877 data->pwm_duty[nr] = pwm_to_reg(data, val);
878 it87_write_value(data, IT87_REG_PWM_DUTY(nr),
879 data->pwm_duty[nr]);
880 } else {
881 data->pwm_duty[nr] = pwm_to_reg(data, val);
882 /* If we are in manual mode, write the duty cycle immediately;
883 * otherwise, just store it for later use. */
884 if (!(data->pwm_ctrl[nr] & 0x80)) {
885 data->pwm_ctrl[nr] = data->pwm_duty[nr];
886 it87_write_value(data, IT87_REG_PWM(nr),
887 data->pwm_ctrl[nr]);
888 }
889 }
890 mutex_unlock(&data->update_lock);
891 return count;
892 }
893 static ssize_t set_pwm_freq(struct device *dev,
894 struct device_attribute *attr, const char *buf, size_t count)
895 {
896 struct it87_data *data = dev_get_drvdata(dev);
897 unsigned long val;
898 int i;
899
900 if (strict_strtoul(buf, 10, &val) < 0)
901 return -EINVAL;
902
903 /* Search for the nearest available frequency */
904 for (i = 0; i < 7; i++) {
905 if (val > (pwm_freq[i] + pwm_freq[i+1]) / 2)
906 break;
907 }
908
909 mutex_lock(&data->update_lock);
910 data->fan_ctl = it87_read_value(data, IT87_REG_FAN_CTL) & 0x8f;
911 data->fan_ctl |= i << 4;
912 it87_write_value(data, IT87_REG_FAN_CTL, data->fan_ctl);
913 mutex_unlock(&data->update_lock);
914
915 return count;
916 }
917 static ssize_t show_pwm_temp_map(struct device *dev,
918 struct device_attribute *attr, char *buf)
919 {
920 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
921 int nr = sensor_attr->index;
922
923 struct it87_data *data = it87_update_device(dev);
924 int map;
925
926 if (data->pwm_temp_map[nr] < 3)
927 map = 1 << data->pwm_temp_map[nr];
928 else
929 map = 0; /* Should never happen */
930 return sprintf(buf, "%d\n", map);
931 }
932 static ssize_t set_pwm_temp_map(struct device *dev,
933 struct device_attribute *attr, const char *buf, size_t count)
934 {
935 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
936 int nr = sensor_attr->index;
937
938 struct it87_data *data = dev_get_drvdata(dev);
939 long val;
940 u8 reg;
941
942 /* This check can go away if we ever support automatic fan speed
943 control on newer chips. */
944 if (!has_old_autopwm(data)) {
945 dev_notice(dev, "Mapping change disabled for safety reasons\n");
946 return -EINVAL;
947 }
948
949 if (strict_strtol(buf, 10, &val) < 0)
950 return -EINVAL;
951
952 switch (val) {
953 case (1 << 0):
954 reg = 0x00;
955 break;
956 case (1 << 1):
957 reg = 0x01;
958 break;
959 case (1 << 2):
960 reg = 0x02;
961 break;
962 default:
963 return -EINVAL;
964 }
965
966 mutex_lock(&data->update_lock);
967 data->pwm_temp_map[nr] = reg;
968 /* If we are in automatic mode, write the temp mapping immediately;
969 * otherwise, just store it for later use. */
970 if (data->pwm_ctrl[nr] & 0x80) {
971 data->pwm_ctrl[nr] = 0x80 | data->pwm_temp_map[nr];
972 it87_write_value(data, IT87_REG_PWM(nr), data->pwm_ctrl[nr]);
973 }
974 mutex_unlock(&data->update_lock);
975 return count;
976 }
977
978 static ssize_t show_auto_pwm(struct device *dev,
979 struct device_attribute *attr, char *buf)
980 {
981 struct it87_data *data = it87_update_device(dev);
982 struct sensor_device_attribute_2 *sensor_attr =
983 to_sensor_dev_attr_2(attr);
984 int nr = sensor_attr->nr;
985 int point = sensor_attr->index;
986
987 return sprintf(buf, "%d\n",
988 pwm_from_reg(data, data->auto_pwm[nr][point]));
989 }
990
991 static ssize_t set_auto_pwm(struct device *dev,
992 struct device_attribute *attr, const char *buf, size_t count)
993 {
994 struct it87_data *data = dev_get_drvdata(dev);
995 struct sensor_device_attribute_2 *sensor_attr =
996 to_sensor_dev_attr_2(attr);
997 int nr = sensor_attr->nr;
998 int point = sensor_attr->index;
999 long val;
1000
1001 if (strict_strtol(buf, 10, &val) < 0 || val < 0 || val > 255)
1002 return -EINVAL;
1003
1004 mutex_lock(&data->update_lock);
1005 data->auto_pwm[nr][point] = pwm_to_reg(data, val);
1006 it87_write_value(data, IT87_REG_AUTO_PWM(nr, point),
1007 data->auto_pwm[nr][point]);
1008 mutex_unlock(&data->update_lock);
1009 return count;
1010 }
1011
1012 static ssize_t show_auto_temp(struct device *dev,
1013 struct device_attribute *attr, char *buf)
1014 {
1015 struct it87_data *data = it87_update_device(dev);
1016 struct sensor_device_attribute_2 *sensor_attr =
1017 to_sensor_dev_attr_2(attr);
1018 int nr = sensor_attr->nr;
1019 int point = sensor_attr->index;
1020
1021 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->auto_temp[nr][point]));
1022 }
1023
1024 static ssize_t set_auto_temp(struct device *dev,
1025 struct device_attribute *attr, const char *buf, size_t count)
1026 {
1027 struct it87_data *data = dev_get_drvdata(dev);
1028 struct sensor_device_attribute_2 *sensor_attr =
1029 to_sensor_dev_attr_2(attr);
1030 int nr = sensor_attr->nr;
1031 int point = sensor_attr->index;
1032 long val;
1033
1034 if (strict_strtol(buf, 10, &val) < 0 || val < -128000 || val > 127000)
1035 return -EINVAL;
1036
1037 mutex_lock(&data->update_lock);
1038 data->auto_temp[nr][point] = TEMP_TO_REG(val);
1039 it87_write_value(data, IT87_REG_AUTO_TEMP(nr, point),
1040 data->auto_temp[nr][point]);
1041 mutex_unlock(&data->update_lock);
1042 return count;
1043 }
1044
1045 #define show_fan_offset(offset) \
1046 static SENSOR_DEVICE_ATTR(fan##offset##_input, S_IRUGO, \
1047 show_fan, NULL, offset - 1); \
1048 static SENSOR_DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \
1049 show_fan_min, set_fan_min, offset - 1); \
1050 static SENSOR_DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR, \
1051 show_fan_div, set_fan_div, offset - 1);
1052
1053 show_fan_offset(1);
1054 show_fan_offset(2);
1055 show_fan_offset(3);
1056
1057 #define show_pwm_offset(offset) \
1058 static SENSOR_DEVICE_ATTR(pwm##offset##_enable, S_IRUGO | S_IWUSR, \
1059 show_pwm_enable, set_pwm_enable, offset - 1); \
1060 static SENSOR_DEVICE_ATTR(pwm##offset, S_IRUGO | S_IWUSR, \
1061 show_pwm, set_pwm, offset - 1); \
1062 static DEVICE_ATTR(pwm##offset##_freq, \
1063 (offset == 1 ? S_IRUGO | S_IWUSR : S_IRUGO), \
1064 show_pwm_freq, (offset == 1 ? set_pwm_freq : NULL)); \
1065 static SENSOR_DEVICE_ATTR(pwm##offset##_auto_channels_temp, \
1066 S_IRUGO | S_IWUSR, show_pwm_temp_map, set_pwm_temp_map, \
1067 offset - 1); \
1068 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point1_pwm, \
1069 S_IRUGO | S_IWUSR, show_auto_pwm, set_auto_pwm, \
1070 offset - 1, 0); \
1071 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point2_pwm, \
1072 S_IRUGO | S_IWUSR, show_auto_pwm, set_auto_pwm, \
1073 offset - 1, 1); \
1074 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point3_pwm, \
1075 S_IRUGO | S_IWUSR, show_auto_pwm, set_auto_pwm, \
1076 offset - 1, 2); \
1077 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point4_pwm, \
1078 S_IRUGO, show_auto_pwm, NULL, offset - 1, 3); \
1079 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point1_temp, \
1080 S_IRUGO | S_IWUSR, show_auto_temp, set_auto_temp, \
1081 offset - 1, 1); \
1082 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point1_temp_hyst, \
1083 S_IRUGO | S_IWUSR, show_auto_temp, set_auto_temp, \
1084 offset - 1, 0); \
1085 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point2_temp, \
1086 S_IRUGO | S_IWUSR, show_auto_temp, set_auto_temp, \
1087 offset - 1, 2); \
1088 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point3_temp, \
1089 S_IRUGO | S_IWUSR, show_auto_temp, set_auto_temp, \
1090 offset - 1, 3); \
1091 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point4_temp, \
1092 S_IRUGO | S_IWUSR, show_auto_temp, set_auto_temp, \
1093 offset - 1, 4);
1094
1095 show_pwm_offset(1);
1096 show_pwm_offset(2);
1097 show_pwm_offset(3);
1098
1099 /* A different set of callbacks for 16-bit fans */
1100 static ssize_t show_fan16(struct device *dev, struct device_attribute *attr,
1101 char *buf)
1102 {
1103 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
1104 int nr = sensor_attr->index;
1105 struct it87_data *data = it87_update_device(dev);
1106 return sprintf(buf, "%d\n", FAN16_FROM_REG(data->fan[nr]));
1107 }
1108
1109 static ssize_t show_fan16_min(struct device *dev, struct device_attribute *attr,
1110 char *buf)
1111 {
1112 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
1113 int nr = sensor_attr->index;
1114 struct it87_data *data = it87_update_device(dev);
1115 return sprintf(buf, "%d\n", FAN16_FROM_REG(data->fan_min[nr]));
1116 }
1117
1118 static ssize_t set_fan16_min(struct device *dev, struct device_attribute *attr,
1119 const char *buf, size_t count)
1120 {
1121 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
1122 int nr = sensor_attr->index;
1123 struct it87_data *data = dev_get_drvdata(dev);
1124 long val;
1125
1126 if (strict_strtol(buf, 10, &val) < 0)
1127 return -EINVAL;
1128
1129 mutex_lock(&data->update_lock);
1130 data->fan_min[nr] = FAN16_TO_REG(val);
1131 it87_write_value(data, IT87_REG_FAN_MIN[nr],
1132 data->fan_min[nr] & 0xff);
1133 it87_write_value(data, IT87_REG_FANX_MIN[nr],
1134 data->fan_min[nr] >> 8);
1135 mutex_unlock(&data->update_lock);
1136 return count;
1137 }
1138
1139 /* We want to use the same sysfs file names as 8-bit fans, but we need
1140 different variable names, so we have to use SENSOR_ATTR instead of
1141 SENSOR_DEVICE_ATTR. */
1142 #define show_fan16_offset(offset) \
1143 static struct sensor_device_attribute sensor_dev_attr_fan##offset##_input16 \
1144 = SENSOR_ATTR(fan##offset##_input, S_IRUGO, \
1145 show_fan16, NULL, offset - 1); \
1146 static struct sensor_device_attribute sensor_dev_attr_fan##offset##_min16 \
1147 = SENSOR_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \
1148 show_fan16_min, set_fan16_min, offset - 1)
1149
1150 show_fan16_offset(1);
1151 show_fan16_offset(2);
1152 show_fan16_offset(3);
1153 show_fan16_offset(4);
1154 show_fan16_offset(5);
1155
1156 /* Alarms */
1157 static ssize_t show_alarms(struct device *dev, struct device_attribute *attr,
1158 char *buf)
1159 {
1160 struct it87_data *data = it87_update_device(dev);
1161 return sprintf(buf, "%u\n", data->alarms);
1162 }
1163 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
1164
1165 static ssize_t show_alarm(struct device *dev, struct device_attribute *attr,
1166 char *buf)
1167 {
1168 int bitnr = to_sensor_dev_attr(attr)->index;
1169 struct it87_data *data = it87_update_device(dev);
1170 return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1);
1171 }
1172 static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 8);
1173 static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 9);
1174 static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 10);
1175 static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 11);
1176 static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 12);
1177 static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 13);
1178 static SENSOR_DEVICE_ATTR(in6_alarm, S_IRUGO, show_alarm, NULL, 14);
1179 static SENSOR_DEVICE_ATTR(in7_alarm, S_IRUGO, show_alarm, NULL, 15);
1180 static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 0);
1181 static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 1);
1182 static SENSOR_DEVICE_ATTR(fan3_alarm, S_IRUGO, show_alarm, NULL, 2);
1183 static SENSOR_DEVICE_ATTR(fan4_alarm, S_IRUGO, show_alarm, NULL, 3);
1184 static SENSOR_DEVICE_ATTR(fan5_alarm, S_IRUGO, show_alarm, NULL, 6);
1185 static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 16);
1186 static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 17);
1187 static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL, 18);
1188
1189 static ssize_t show_beep(struct device *dev, struct device_attribute *attr,
1190 char *buf)
1191 {
1192 int bitnr = to_sensor_dev_attr(attr)->index;
1193 struct it87_data *data = it87_update_device(dev);
1194 return sprintf(buf, "%u\n", (data->beeps >> bitnr) & 1);
1195 }
1196 static ssize_t set_beep(struct device *dev, struct device_attribute *attr,
1197 const char *buf, size_t count)
1198 {
1199 int bitnr = to_sensor_dev_attr(attr)->index;
1200 struct it87_data *data = dev_get_drvdata(dev);
1201 long val;
1202
1203 if (strict_strtol(buf, 10, &val) < 0
1204 || (val != 0 && val != 1))
1205 return -EINVAL;
1206
1207 mutex_lock(&data->update_lock);
1208 data->beeps = it87_read_value(data, IT87_REG_BEEP_ENABLE);
1209 if (val)
1210 data->beeps |= (1 << bitnr);
1211 else
1212 data->beeps &= ~(1 << bitnr);
1213 it87_write_value(data, IT87_REG_BEEP_ENABLE, data->beeps);
1214 mutex_unlock(&data->update_lock);
1215 return count;
1216 }
1217
1218 static SENSOR_DEVICE_ATTR(in0_beep, S_IRUGO | S_IWUSR,
1219 show_beep, set_beep, 1);
1220 static SENSOR_DEVICE_ATTR(in1_beep, S_IRUGO, show_beep, NULL, 1);
1221 static SENSOR_DEVICE_ATTR(in2_beep, S_IRUGO, show_beep, NULL, 1);
1222 static SENSOR_DEVICE_ATTR(in3_beep, S_IRUGO, show_beep, NULL, 1);
1223 static SENSOR_DEVICE_ATTR(in4_beep, S_IRUGO, show_beep, NULL, 1);
1224 static SENSOR_DEVICE_ATTR(in5_beep, S_IRUGO, show_beep, NULL, 1);
1225 static SENSOR_DEVICE_ATTR(in6_beep, S_IRUGO, show_beep, NULL, 1);
1226 static SENSOR_DEVICE_ATTR(in7_beep, S_IRUGO, show_beep, NULL, 1);
1227 /* fanX_beep writability is set later */
1228 static SENSOR_DEVICE_ATTR(fan1_beep, S_IRUGO, show_beep, set_beep, 0);
1229 static SENSOR_DEVICE_ATTR(fan2_beep, S_IRUGO, show_beep, set_beep, 0);
1230 static SENSOR_DEVICE_ATTR(fan3_beep, S_IRUGO, show_beep, set_beep, 0);
1231 static SENSOR_DEVICE_ATTR(fan4_beep, S_IRUGO, show_beep, set_beep, 0);
1232 static SENSOR_DEVICE_ATTR(fan5_beep, S_IRUGO, show_beep, set_beep, 0);
1233 static SENSOR_DEVICE_ATTR(temp1_beep, S_IRUGO | S_IWUSR,
1234 show_beep, set_beep, 2);
1235 static SENSOR_DEVICE_ATTR(temp2_beep, S_IRUGO, show_beep, NULL, 2);
1236 static SENSOR_DEVICE_ATTR(temp3_beep, S_IRUGO, show_beep, NULL, 2);
1237
1238 static ssize_t show_vrm_reg(struct device *dev, struct device_attribute *attr,
1239 char *buf)
1240 {
1241 struct it87_data *data = dev_get_drvdata(dev);
1242 return sprintf(buf, "%u\n", data->vrm);
1243 }
1244 static ssize_t store_vrm_reg(struct device *dev, struct device_attribute *attr,
1245 const char *buf, size_t count)
1246 {
1247 struct it87_data *data = dev_get_drvdata(dev);
1248 unsigned long val;
1249
1250 if (strict_strtoul(buf, 10, &val) < 0)
1251 return -EINVAL;
1252
1253 data->vrm = val;
1254
1255 return count;
1256 }
1257 static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm_reg, store_vrm_reg);
1258
1259 static ssize_t show_vid_reg(struct device *dev, struct device_attribute *attr,
1260 char *buf)
1261 {
1262 struct it87_data *data = it87_update_device(dev);
1263 return sprintf(buf, "%ld\n", (long) vid_from_reg(data->vid, data->vrm));
1264 }
1265 static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid_reg, NULL);
1266
1267 static ssize_t show_label(struct device *dev, struct device_attribute *attr,
1268 char *buf)
1269 {
1270 static const char *labels[] = {
1271 "+5V",
1272 "5VSB",
1273 "Vbat",
1274 };
1275 static const char *labels_it8721[] = {
1276 "+3.3V",
1277 "3VSB",
1278 "Vbat",
1279 };
1280 struct it87_data *data = dev_get_drvdata(dev);
1281 int nr = to_sensor_dev_attr(attr)->index;
1282
1283 return sprintf(buf, "%s\n", data->type == it8721 ? labels_it8721[nr]
1284 : labels[nr]);
1285 }
1286 static SENSOR_DEVICE_ATTR(in3_label, S_IRUGO, show_label, NULL, 0);
1287 static SENSOR_DEVICE_ATTR(in7_label, S_IRUGO, show_label, NULL, 1);
1288 static SENSOR_DEVICE_ATTR(in8_label, S_IRUGO, show_label, NULL, 2);
1289
1290 static ssize_t show_name(struct device *dev, struct device_attribute
1291 *devattr, char *buf)
1292 {
1293 struct it87_data *data = dev_get_drvdata(dev);
1294 return sprintf(buf, "%s\n", data->name);
1295 }
1296 static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
1297
1298 static struct attribute *it87_attributes[] = {
1299 &sensor_dev_attr_in0_input.dev_attr.attr,
1300 &sensor_dev_attr_in1_input.dev_attr.attr,
1301 &sensor_dev_attr_in2_input.dev_attr.attr,
1302 &sensor_dev_attr_in3_input.dev_attr.attr,
1303 &sensor_dev_attr_in4_input.dev_attr.attr,
1304 &sensor_dev_attr_in5_input.dev_attr.attr,
1305 &sensor_dev_attr_in6_input.dev_attr.attr,
1306 &sensor_dev_attr_in7_input.dev_attr.attr,
1307 &sensor_dev_attr_in8_input.dev_attr.attr,
1308 &sensor_dev_attr_in0_min.dev_attr.attr,
1309 &sensor_dev_attr_in1_min.dev_attr.attr,
1310 &sensor_dev_attr_in2_min.dev_attr.attr,
1311 &sensor_dev_attr_in3_min.dev_attr.attr,
1312 &sensor_dev_attr_in4_min.dev_attr.attr,
1313 &sensor_dev_attr_in5_min.dev_attr.attr,
1314 &sensor_dev_attr_in6_min.dev_attr.attr,
1315 &sensor_dev_attr_in7_min.dev_attr.attr,
1316 &sensor_dev_attr_in0_max.dev_attr.attr,
1317 &sensor_dev_attr_in1_max.dev_attr.attr,
1318 &sensor_dev_attr_in2_max.dev_attr.attr,
1319 &sensor_dev_attr_in3_max.dev_attr.attr,
1320 &sensor_dev_attr_in4_max.dev_attr.attr,
1321 &sensor_dev_attr_in5_max.dev_attr.attr,
1322 &sensor_dev_attr_in6_max.dev_attr.attr,
1323 &sensor_dev_attr_in7_max.dev_attr.attr,
1324 &sensor_dev_attr_in0_alarm.dev_attr.attr,
1325 &sensor_dev_attr_in1_alarm.dev_attr.attr,
1326 &sensor_dev_attr_in2_alarm.dev_attr.attr,
1327 &sensor_dev_attr_in3_alarm.dev_attr.attr,
1328 &sensor_dev_attr_in4_alarm.dev_attr.attr,
1329 &sensor_dev_attr_in5_alarm.dev_attr.attr,
1330 &sensor_dev_attr_in6_alarm.dev_attr.attr,
1331 &sensor_dev_attr_in7_alarm.dev_attr.attr,
1332
1333 &sensor_dev_attr_temp1_input.dev_attr.attr,
1334 &sensor_dev_attr_temp2_input.dev_attr.attr,
1335 &sensor_dev_attr_temp3_input.dev_attr.attr,
1336 &sensor_dev_attr_temp1_max.dev_attr.attr,
1337 &sensor_dev_attr_temp2_max.dev_attr.attr,
1338 &sensor_dev_attr_temp3_max.dev_attr.attr,
1339 &sensor_dev_attr_temp1_min.dev_attr.attr,
1340 &sensor_dev_attr_temp2_min.dev_attr.attr,
1341 &sensor_dev_attr_temp3_min.dev_attr.attr,
1342 &sensor_dev_attr_temp1_type.dev_attr.attr,
1343 &sensor_dev_attr_temp2_type.dev_attr.attr,
1344 &sensor_dev_attr_temp3_type.dev_attr.attr,
1345 &sensor_dev_attr_temp1_alarm.dev_attr.attr,
1346 &sensor_dev_attr_temp2_alarm.dev_attr.attr,
1347 &sensor_dev_attr_temp3_alarm.dev_attr.attr,
1348
1349 &dev_attr_alarms.attr,
1350 &dev_attr_name.attr,
1351 NULL
1352 };
1353
1354 static const struct attribute_group it87_group = {
1355 .attrs = it87_attributes,
1356 };
1357
1358 static struct attribute *it87_attributes_beep[] = {
1359 &sensor_dev_attr_in0_beep.dev_attr.attr,
1360 &sensor_dev_attr_in1_beep.dev_attr.attr,
1361 &sensor_dev_attr_in2_beep.dev_attr.attr,
1362 &sensor_dev_attr_in3_beep.dev_attr.attr,
1363 &sensor_dev_attr_in4_beep.dev_attr.attr,
1364 &sensor_dev_attr_in5_beep.dev_attr.attr,
1365 &sensor_dev_attr_in6_beep.dev_attr.attr,
1366 &sensor_dev_attr_in7_beep.dev_attr.attr,
1367
1368 &sensor_dev_attr_temp1_beep.dev_attr.attr,
1369 &sensor_dev_attr_temp2_beep.dev_attr.attr,
1370 &sensor_dev_attr_temp3_beep.dev_attr.attr,
1371 NULL
1372 };
1373
1374 static const struct attribute_group it87_group_beep = {
1375 .attrs = it87_attributes_beep,
1376 };
1377
1378 static struct attribute *it87_attributes_fan16[5][3+1] = { {
1379 &sensor_dev_attr_fan1_input16.dev_attr.attr,
1380 &sensor_dev_attr_fan1_min16.dev_attr.attr,
1381 &sensor_dev_attr_fan1_alarm.dev_attr.attr,
1382 NULL
1383 }, {
1384 &sensor_dev_attr_fan2_input16.dev_attr.attr,
1385 &sensor_dev_attr_fan2_min16.dev_attr.attr,
1386 &sensor_dev_attr_fan2_alarm.dev_attr.attr,
1387 NULL
1388 }, {
1389 &sensor_dev_attr_fan3_input16.dev_attr.attr,
1390 &sensor_dev_attr_fan3_min16.dev_attr.attr,
1391 &sensor_dev_attr_fan3_alarm.dev_attr.attr,
1392 NULL
1393 }, {
1394 &sensor_dev_attr_fan4_input16.dev_attr.attr,
1395 &sensor_dev_attr_fan4_min16.dev_attr.attr,
1396 &sensor_dev_attr_fan4_alarm.dev_attr.attr,
1397 NULL
1398 }, {
1399 &sensor_dev_attr_fan5_input16.dev_attr.attr,
1400 &sensor_dev_attr_fan5_min16.dev_attr.attr,
1401 &sensor_dev_attr_fan5_alarm.dev_attr.attr,
1402 NULL
1403 } };
1404
1405 static const struct attribute_group it87_group_fan16[5] = {
1406 { .attrs = it87_attributes_fan16[0] },
1407 { .attrs = it87_attributes_fan16[1] },
1408 { .attrs = it87_attributes_fan16[2] },
1409 { .attrs = it87_attributes_fan16[3] },
1410 { .attrs = it87_attributes_fan16[4] },
1411 };
1412
1413 static struct attribute *it87_attributes_fan[3][4+1] = { {
1414 &sensor_dev_attr_fan1_input.dev_attr.attr,
1415 &sensor_dev_attr_fan1_min.dev_attr.attr,
1416 &sensor_dev_attr_fan1_div.dev_attr.attr,
1417 &sensor_dev_attr_fan1_alarm.dev_attr.attr,
1418 NULL
1419 }, {
1420 &sensor_dev_attr_fan2_input.dev_attr.attr,
1421 &sensor_dev_attr_fan2_min.dev_attr.attr,
1422 &sensor_dev_attr_fan2_div.dev_attr.attr,
1423 &sensor_dev_attr_fan2_alarm.dev_attr.attr,
1424 NULL
1425 }, {
1426 &sensor_dev_attr_fan3_input.dev_attr.attr,
1427 &sensor_dev_attr_fan3_min.dev_attr.attr,
1428 &sensor_dev_attr_fan3_div.dev_attr.attr,
1429 &sensor_dev_attr_fan3_alarm.dev_attr.attr,
1430 NULL
1431 } };
1432
1433 static const struct attribute_group it87_group_fan[3] = {
1434 { .attrs = it87_attributes_fan[0] },
1435 { .attrs = it87_attributes_fan[1] },
1436 { .attrs = it87_attributes_fan[2] },
1437 };
1438
1439 static const struct attribute_group *
1440 it87_get_fan_group(const struct it87_data *data)
1441 {
1442 return has_16bit_fans(data) ? it87_group_fan16 : it87_group_fan;
1443 }
1444
1445 static struct attribute *it87_attributes_pwm[3][4+1] = { {
1446 &sensor_dev_attr_pwm1_enable.dev_attr.attr,
1447 &sensor_dev_attr_pwm1.dev_attr.attr,
1448 &dev_attr_pwm1_freq.attr,
1449 &sensor_dev_attr_pwm1_auto_channels_temp.dev_attr.attr,
1450 NULL
1451 }, {
1452 &sensor_dev_attr_pwm2_enable.dev_attr.attr,
1453 &sensor_dev_attr_pwm2.dev_attr.attr,
1454 &dev_attr_pwm2_freq.attr,
1455 &sensor_dev_attr_pwm2_auto_channels_temp.dev_attr.attr,
1456 NULL
1457 }, {
1458 &sensor_dev_attr_pwm3_enable.dev_attr.attr,
1459 &sensor_dev_attr_pwm3.dev_attr.attr,
1460 &dev_attr_pwm3_freq.attr,
1461 &sensor_dev_attr_pwm3_auto_channels_temp.dev_attr.attr,
1462 NULL
1463 } };
1464
1465 static const struct attribute_group it87_group_pwm[3] = {
1466 { .attrs = it87_attributes_pwm[0] },
1467 { .attrs = it87_attributes_pwm[1] },
1468 { .attrs = it87_attributes_pwm[2] },
1469 };
1470
1471 static struct attribute *it87_attributes_autopwm[3][9+1] = { {
1472 &sensor_dev_attr_pwm1_auto_point1_pwm.dev_attr.attr,
1473 &sensor_dev_attr_pwm1_auto_point2_pwm.dev_attr.attr,
1474 &sensor_dev_attr_pwm1_auto_point3_pwm.dev_attr.attr,
1475 &sensor_dev_attr_pwm1_auto_point4_pwm.dev_attr.attr,
1476 &sensor_dev_attr_pwm1_auto_point1_temp.dev_attr.attr,
1477 &sensor_dev_attr_pwm1_auto_point1_temp_hyst.dev_attr.attr,
1478 &sensor_dev_attr_pwm1_auto_point2_temp.dev_attr.attr,
1479 &sensor_dev_attr_pwm1_auto_point3_temp.dev_attr.attr,
1480 &sensor_dev_attr_pwm1_auto_point4_temp.dev_attr.attr,
1481 NULL
1482 }, {
1483 &sensor_dev_attr_pwm2_auto_point1_pwm.dev_attr.attr,
1484 &sensor_dev_attr_pwm2_auto_point2_pwm.dev_attr.attr,
1485 &sensor_dev_attr_pwm2_auto_point3_pwm.dev_attr.attr,
1486 &sensor_dev_attr_pwm2_auto_point4_pwm.dev_attr.attr,
1487 &sensor_dev_attr_pwm2_auto_point1_temp.dev_attr.attr,
1488 &sensor_dev_attr_pwm2_auto_point1_temp_hyst.dev_attr.attr,
1489 &sensor_dev_attr_pwm2_auto_point2_temp.dev_attr.attr,
1490 &sensor_dev_attr_pwm2_auto_point3_temp.dev_attr.attr,
1491 &sensor_dev_attr_pwm2_auto_point4_temp.dev_attr.attr,
1492 NULL
1493 }, {
1494 &sensor_dev_attr_pwm3_auto_point1_pwm.dev_attr.attr,
1495 &sensor_dev_attr_pwm3_auto_point2_pwm.dev_attr.attr,
1496 &sensor_dev_attr_pwm3_auto_point3_pwm.dev_attr.attr,
1497 &sensor_dev_attr_pwm3_auto_point4_pwm.dev_attr.attr,
1498 &sensor_dev_attr_pwm3_auto_point1_temp.dev_attr.attr,
1499 &sensor_dev_attr_pwm3_auto_point1_temp_hyst.dev_attr.attr,
1500 &sensor_dev_attr_pwm3_auto_point2_temp.dev_attr.attr,
1501 &sensor_dev_attr_pwm3_auto_point3_temp.dev_attr.attr,
1502 &sensor_dev_attr_pwm3_auto_point4_temp.dev_attr.attr,
1503 NULL
1504 } };
1505
1506 static const struct attribute_group it87_group_autopwm[3] = {
1507 { .attrs = it87_attributes_autopwm[0] },
1508 { .attrs = it87_attributes_autopwm[1] },
1509 { .attrs = it87_attributes_autopwm[2] },
1510 };
1511
1512 static struct attribute *it87_attributes_fan_beep[] = {
1513 &sensor_dev_attr_fan1_beep.dev_attr.attr,
1514 &sensor_dev_attr_fan2_beep.dev_attr.attr,
1515 &sensor_dev_attr_fan3_beep.dev_attr.attr,
1516 &sensor_dev_attr_fan4_beep.dev_attr.attr,
1517 &sensor_dev_attr_fan5_beep.dev_attr.attr,
1518 };
1519
1520 static struct attribute *it87_attributes_vid[] = {
1521 &dev_attr_vrm.attr,
1522 &dev_attr_cpu0_vid.attr,
1523 NULL
1524 };
1525
1526 static const struct attribute_group it87_group_vid = {
1527 .attrs = it87_attributes_vid,
1528 };
1529
1530 static struct attribute *it87_attributes_label[] = {
1531 &sensor_dev_attr_in3_label.dev_attr.attr,
1532 &sensor_dev_attr_in7_label.dev_attr.attr,
1533 &sensor_dev_attr_in8_label.dev_attr.attr,
1534 NULL
1535 };
1536
1537 static const struct attribute_group it87_group_label = {
1538 .attrs = it87_attributes_vid,
1539 };
1540
1541 /* SuperIO detection - will change isa_address if a chip is found */
1542 static int __init it87_find(unsigned short *address,
1543 struct it87_sio_data *sio_data)
1544 {
1545 int err = -ENODEV;
1546 u16 chip_type;
1547 const char *board_vendor, *board_name;
1548
1549 superio_enter();
1550 chip_type = force_id ? force_id : superio_inw(DEVID);
1551
1552 switch (chip_type) {
1553 case IT8705F_DEVID:
1554 sio_data->type = it87;
1555 break;
1556 case IT8712F_DEVID:
1557 sio_data->type = it8712;
1558 break;
1559 case IT8716F_DEVID:
1560 case IT8726F_DEVID:
1561 sio_data->type = it8716;
1562 break;
1563 case IT8718F_DEVID:
1564 sio_data->type = it8718;
1565 break;
1566 case IT8720F_DEVID:
1567 sio_data->type = it8720;
1568 break;
1569 case IT8721F_DEVID:
1570 sio_data->type = it8721;
1571 break;
1572 case 0xffff: /* No device at all */
1573 goto exit;
1574 default:
1575 pr_debug("Unsupported chip (DEVID=0x%x)\n", chip_type);
1576 goto exit;
1577 }
1578
1579 superio_select(PME);
1580 if (!(superio_inb(IT87_ACT_REG) & 0x01)) {
1581 pr_info("Device not activated, skipping\n");
1582 goto exit;
1583 }
1584
1585 *address = superio_inw(IT87_BASE_REG) & ~(IT87_EXTENT - 1);
1586 if (*address == 0) {
1587 pr_info("Base address not set, skipping\n");
1588 goto exit;
1589 }
1590
1591 err = 0;
1592 sio_data->revision = superio_inb(DEVREV) & 0x0f;
1593 pr_info("Found IT%04xF chip at 0x%x, revision %d\n",
1594 chip_type, *address, sio_data->revision);
1595
1596 /* in8 (Vbat) is always internal */
1597 sio_data->internal = (1 << 2);
1598
1599 /* Read GPIO config and VID value from LDN 7 (GPIO) */
1600 if (sio_data->type == it87) {
1601 /* The IT8705F doesn't have VID pins at all */
1602 sio_data->skip_vid = 1;
1603
1604 /* The IT8705F has a different LD number for GPIO */
1605 superio_select(5);
1606 sio_data->beep_pin = superio_inb(IT87_SIO_BEEP_PIN_REG) & 0x3f;
1607 } else {
1608 int reg;
1609
1610 superio_select(GPIO);
1611
1612 reg = superio_inb(IT87_SIO_GPIO3_REG);
1613 if (sio_data->type == it8721) {
1614 /* The IT8721F/IT8758E doesn't have VID pins at all */
1615 sio_data->skip_vid = 1;
1616 } else {
1617 /* We need at least 4 VID pins */
1618 if (reg & 0x0f) {
1619 pr_info("VID is disabled (pins used for GPIO)\n");
1620 sio_data->skip_vid = 1;
1621 }
1622 }
1623
1624 /* Check if fan3 is there or not */
1625 if (reg & (1 << 6))
1626 sio_data->skip_pwm |= (1 << 2);
1627 if (reg & (1 << 7))
1628 sio_data->skip_fan |= (1 << 2);
1629
1630 /* Check if fan2 is there or not */
1631 reg = superio_inb(IT87_SIO_GPIO5_REG);
1632 if (reg & (1 << 1))
1633 sio_data->skip_pwm |= (1 << 1);
1634 if (reg & (1 << 2))
1635 sio_data->skip_fan |= (1 << 1);
1636
1637 if ((sio_data->type == it8718 || sio_data->type == it8720)
1638 && !(sio_data->skip_vid))
1639 sio_data->vid_value = superio_inb(IT87_SIO_VID_REG);
1640
1641 reg = superio_inb(IT87_SIO_PINX2_REG);
1642 /*
1643 * The IT8720F has no VIN7 pin, so VCCH should always be
1644 * routed internally to VIN7 with an internal divider.
1645 * Curiously, there still is a configuration bit to control
1646 * this, which means it can be set incorrectly. And even
1647 * more curiously, many boards out there are improperly
1648 * configured, even though the IT8720F datasheet claims
1649 * that the internal routing of VCCH to VIN7 is the default
1650 * setting. So we force the internal routing in this case.
1651 */
1652 if (sio_data->type == it8720 && !(reg & (1 << 1))) {
1653 reg |= (1 << 1);
1654 superio_outb(IT87_SIO_PINX2_REG, reg);
1655 pr_notice("Routing internal VCCH to in7\n");
1656 }
1657 if (reg & (1 << 0))
1658 sio_data->internal |= (1 << 0);
1659 if ((reg & (1 << 1)) || sio_data->type == it8721)
1660 sio_data->internal |= (1 << 1);
1661
1662 sio_data->beep_pin = superio_inb(IT87_SIO_BEEP_PIN_REG) & 0x3f;
1663 }
1664 if (sio_data->beep_pin)
1665 pr_info("Beeping is supported\n");
1666
1667 /* Disable specific features based on DMI strings */
1668 board_vendor = dmi_get_system_info(DMI_BOARD_VENDOR);
1669 board_name = dmi_get_system_info(DMI_BOARD_NAME);
1670 if (board_vendor && board_name) {
1671 if (strcmp(board_vendor, "nVIDIA") == 0
1672 && strcmp(board_name, "FN68PT") == 0) {
1673 /* On the Shuttle SN68PT, FAN_CTL2 is apparently not
1674 connected to a fan, but to something else. One user
1675 has reported instant system power-off when changing
1676 the PWM2 duty cycle, so we disable it.
1677 I use the board name string as the trigger in case
1678 the same board is ever used in other systems. */
1679 pr_info("Disabling pwm2 due to hardware constraints\n");
1680 sio_data->skip_pwm = (1 << 1);
1681 }
1682 }
1683
1684 exit:
1685 superio_exit();
1686 return err;
1687 }
1688
1689 static void it87_remove_files(struct device *dev)
1690 {
1691 struct it87_data *data = platform_get_drvdata(pdev);
1692 struct it87_sio_data *sio_data = dev->platform_data;
1693 const struct attribute_group *fan_group = it87_get_fan_group(data);
1694 int i;
1695
1696 sysfs_remove_group(&dev->kobj, &it87_group);
1697 if (sio_data->beep_pin)
1698 sysfs_remove_group(&dev->kobj, &it87_group_beep);
1699 for (i = 0; i < 5; i++) {
1700 if (!(data->has_fan & (1 << i)))
1701 continue;
1702 sysfs_remove_group(&dev->kobj, &fan_group[i]);
1703 if (sio_data->beep_pin)
1704 sysfs_remove_file(&dev->kobj,
1705 it87_attributes_fan_beep[i]);
1706 }
1707 for (i = 0; i < 3; i++) {
1708 if (sio_data->skip_pwm & (1 << 0))
1709 continue;
1710 sysfs_remove_group(&dev->kobj, &it87_group_pwm[i]);
1711 if (has_old_autopwm(data))
1712 sysfs_remove_group(&dev->kobj,
1713 &it87_group_autopwm[i]);
1714 }
1715 if (!sio_data->skip_vid)
1716 sysfs_remove_group(&dev->kobj, &it87_group_vid);
1717 sysfs_remove_group(&dev->kobj, &it87_group_label);
1718 }
1719
1720 static int __devinit it87_probe(struct platform_device *pdev)
1721 {
1722 struct it87_data *data;
1723 struct resource *res;
1724 struct device *dev = &pdev->dev;
1725 struct it87_sio_data *sio_data = dev->platform_data;
1726 const struct attribute_group *fan_group;
1727 int err = 0, i;
1728 int enable_pwm_interface;
1729 int fan_beep_need_rw;
1730 static const char *names[] = {
1731 "it87",
1732 "it8712",
1733 "it8716",
1734 "it8718",
1735 "it8720",
1736 "it8721",
1737 };
1738
1739 res = platform_get_resource(pdev, IORESOURCE_IO, 0);
1740 if (!request_region(res->start, IT87_EC_EXTENT, DRVNAME)) {
1741 dev_err(dev, "Failed to request region 0x%lx-0x%lx\n",
1742 (unsigned long)res->start,
1743 (unsigned long)(res->start + IT87_EC_EXTENT - 1));
1744 err = -EBUSY;
1745 goto ERROR0;
1746 }
1747
1748 data = kzalloc(sizeof(struct it87_data), GFP_KERNEL);
1749 if (!data) {
1750 err = -ENOMEM;
1751 goto ERROR1;
1752 }
1753
1754 data->addr = res->start;
1755 data->type = sio_data->type;
1756 data->revision = sio_data->revision;
1757 data->name = names[sio_data->type];
1758
1759 /* Now, we do the remaining detection. */
1760 if ((it87_read_value(data, IT87_REG_CONFIG) & 0x80)
1761 || it87_read_value(data, IT87_REG_CHIPID) != 0x90) {
1762 err = -ENODEV;
1763 goto ERROR2;
1764 }
1765
1766 platform_set_drvdata(pdev, data);
1767
1768 mutex_init(&data->update_lock);
1769
1770 /* Check PWM configuration */
1771 enable_pwm_interface = it87_check_pwm(dev);
1772
1773 /* Starting with IT8721F, we handle scaling of internal voltages */
1774 if (data->type == it8721) {
1775 if (sio_data->internal & (1 << 0))
1776 data->in_scaled |= (1 << 3); /* in3 is AVCC */
1777 if (sio_data->internal & (1 << 1))
1778 data->in_scaled |= (1 << 7); /* in7 is VSB */
1779 if (sio_data->internal & (1 << 2))
1780 data->in_scaled |= (1 << 8); /* in8 is Vbat */
1781 }
1782
1783 /* Initialize the IT87 chip */
1784 it87_init_device(pdev);
1785
1786 /* Register sysfs hooks */
1787 err = sysfs_create_group(&dev->kobj, &it87_group);
1788 if (err)
1789 goto ERROR2;
1790
1791 if (sio_data->beep_pin) {
1792 err = sysfs_create_group(&dev->kobj, &it87_group_beep);
1793 if (err)
1794 goto ERROR4;
1795 }
1796
1797 /* Do not create fan files for disabled fans */
1798 fan_group = it87_get_fan_group(data);
1799 fan_beep_need_rw = 1;
1800 for (i = 0; i < 5; i++) {
1801 if (!(data->has_fan & (1 << i)))
1802 continue;
1803 err = sysfs_create_group(&dev->kobj, &fan_group[i]);
1804 if (err)
1805 goto ERROR4;
1806
1807 if (sio_data->beep_pin) {
1808 err = sysfs_create_file(&dev->kobj,
1809 it87_attributes_fan_beep[i]);
1810 if (err)
1811 goto ERROR4;
1812 if (!fan_beep_need_rw)
1813 continue;
1814
1815 /* As we have a single beep enable bit for all fans,
1816 * only the first enabled fan has a writable attribute
1817 * for it. */
1818 if (sysfs_chmod_file(&dev->kobj,
1819 it87_attributes_fan_beep[i],
1820 S_IRUGO | S_IWUSR))
1821 dev_dbg(dev, "chmod +w fan%d_beep failed\n",
1822 i + 1);
1823 fan_beep_need_rw = 0;
1824 }
1825 }
1826
1827 if (enable_pwm_interface) {
1828 for (i = 0; i < 3; i++) {
1829 if (sio_data->skip_pwm & (1 << i))
1830 continue;
1831 err = sysfs_create_group(&dev->kobj,
1832 &it87_group_pwm[i]);
1833 if (err)
1834 goto ERROR4;
1835
1836 if (!has_old_autopwm(data))
1837 continue;
1838 err = sysfs_create_group(&dev->kobj,
1839 &it87_group_autopwm[i]);
1840 if (err)
1841 goto ERROR4;
1842 }
1843 }
1844
1845 if (!sio_data->skip_vid) {
1846 data->vrm = vid_which_vrm();
1847 /* VID reading from Super-I/O config space if available */
1848 data->vid = sio_data->vid_value;
1849 err = sysfs_create_group(&dev->kobj, &it87_group_vid);
1850 if (err)
1851 goto ERROR4;
1852 }
1853
1854 /* Export labels for internal sensors */
1855 for (i = 0; i < 3; i++) {
1856 if (!(sio_data->internal & (1 << i)))
1857 continue;
1858 err = sysfs_create_file(&dev->kobj,
1859 it87_attributes_label[i]);
1860 if (err)
1861 goto ERROR4;
1862 }
1863
1864 data->hwmon_dev = hwmon_device_register(dev);
1865 if (IS_ERR(data->hwmon_dev)) {
1866 err = PTR_ERR(data->hwmon_dev);
1867 goto ERROR4;
1868 }
1869
1870 return 0;
1871
1872 ERROR4:
1873 it87_remove_files(dev);
1874 ERROR2:
1875 platform_set_drvdata(pdev, NULL);
1876 kfree(data);
1877 ERROR1:
1878 release_region(res->start, IT87_EC_EXTENT);
1879 ERROR0:
1880 return err;
1881 }
1882
1883 static int __devexit it87_remove(struct platform_device *pdev)
1884 {
1885 struct it87_data *data = platform_get_drvdata(pdev);
1886
1887 hwmon_device_unregister(data->hwmon_dev);
1888 it87_remove_files(&pdev->dev);
1889
1890 release_region(data->addr, IT87_EC_EXTENT);
1891 platform_set_drvdata(pdev, NULL);
1892 kfree(data);
1893
1894 return 0;
1895 }
1896
1897 /* Must be called with data->update_lock held, except during initialization.
1898 We ignore the IT87 BUSY flag at this moment - it could lead to deadlocks,
1899 would slow down the IT87 access and should not be necessary. */
1900 static int it87_read_value(struct it87_data *data, u8 reg)
1901 {
1902 outb_p(reg, data->addr + IT87_ADDR_REG_OFFSET);
1903 return inb_p(data->addr + IT87_DATA_REG_OFFSET);
1904 }
1905
1906 /* Must be called with data->update_lock held, except during initialization.
1907 We ignore the IT87 BUSY flag at this moment - it could lead to deadlocks,
1908 would slow down the IT87 access and should not be necessary. */
1909 static void it87_write_value(struct it87_data *data, u8 reg, u8 value)
1910 {
1911 outb_p(reg, data->addr + IT87_ADDR_REG_OFFSET);
1912 outb_p(value, data->addr + IT87_DATA_REG_OFFSET);
1913 }
1914
1915 /* Return 1 if and only if the PWM interface is safe to use */
1916 static int __devinit it87_check_pwm(struct device *dev)
1917 {
1918 struct it87_data *data = dev_get_drvdata(dev);
1919 /* Some BIOSes fail to correctly configure the IT87 fans. All fans off
1920 * and polarity set to active low is sign that this is the case so we
1921 * disable pwm control to protect the user. */
1922 int tmp = it87_read_value(data, IT87_REG_FAN_CTL);
1923 if ((tmp & 0x87) == 0) {
1924 if (fix_pwm_polarity) {
1925 /* The user asks us to attempt a chip reconfiguration.
1926 * This means switching to active high polarity and
1927 * inverting all fan speed values. */
1928 int i;
1929 u8 pwm[3];
1930
1931 for (i = 0; i < 3; i++)
1932 pwm[i] = it87_read_value(data,
1933 IT87_REG_PWM(i));
1934
1935 /* If any fan is in automatic pwm mode, the polarity
1936 * might be correct, as suspicious as it seems, so we
1937 * better don't change anything (but still disable the
1938 * PWM interface). */
1939 if (!((pwm[0] | pwm[1] | pwm[2]) & 0x80)) {
1940 dev_info(dev, "Reconfiguring PWM to "
1941 "active high polarity\n");
1942 it87_write_value(data, IT87_REG_FAN_CTL,
1943 tmp | 0x87);
1944 for (i = 0; i < 3; i++)
1945 it87_write_value(data,
1946 IT87_REG_PWM(i),
1947 0x7f & ~pwm[i]);
1948 return 1;
1949 }
1950
1951 dev_info(dev, "PWM configuration is "
1952 "too broken to be fixed\n");
1953 }
1954
1955 dev_info(dev, "Detected broken BIOS "
1956 "defaults, disabling PWM interface\n");
1957 return 0;
1958 } else if (fix_pwm_polarity) {
1959 dev_info(dev, "PWM configuration looks "
1960 "sane, won't touch\n");
1961 }
1962
1963 return 1;
1964 }
1965
1966 /* Called when we have found a new IT87. */
1967 static void __devinit it87_init_device(struct platform_device *pdev)
1968 {
1969 struct it87_sio_data *sio_data = pdev->dev.platform_data;
1970 struct it87_data *data = platform_get_drvdata(pdev);
1971 int tmp, i;
1972 u8 mask;
1973
1974 /* For each PWM channel:
1975 * - If it is in automatic mode, setting to manual mode should set
1976 * the fan to full speed by default.
1977 * - If it is in manual mode, we need a mapping to temperature
1978 * channels to use when later setting to automatic mode later.
1979 * Use a 1:1 mapping by default (we are clueless.)
1980 * In both cases, the value can (and should) be changed by the user
1981 * prior to switching to a different mode.
1982 * Note that this is no longer needed for the IT8721F and later, as
1983 * these have separate registers for the temperature mapping and the
1984 * manual duty cycle. */
1985 for (i = 0; i < 3; i++) {
1986 data->pwm_temp_map[i] = i;
1987 data->pwm_duty[i] = 0x7f; /* Full speed */
1988 data->auto_pwm[i][3] = 0x7f; /* Full speed, hard-coded */
1989 }
1990
1991 /* Some chips seem to have default value 0xff for all limit
1992 * registers. For low voltage limits it makes no sense and triggers
1993 * alarms, so change to 0 instead. For high temperature limits, it
1994 * means -1 degree C, which surprisingly doesn't trigger an alarm,
1995 * but is still confusing, so change to 127 degrees C. */
1996 for (i = 0; i < 8; i++) {
1997 tmp = it87_read_value(data, IT87_REG_VIN_MIN(i));
1998 if (tmp == 0xff)
1999 it87_write_value(data, IT87_REG_VIN_MIN(i), 0);
2000 }
2001 for (i = 0; i < 3; i++) {
2002 tmp = it87_read_value(data, IT87_REG_TEMP_HIGH(i));
2003 if (tmp == 0xff)
2004 it87_write_value(data, IT87_REG_TEMP_HIGH(i), 127);
2005 }
2006
2007 /* Temperature channels are not forcibly enabled, as they can be
2008 * set to two different sensor types and we can't guess which one
2009 * is correct for a given system. These channels can be enabled at
2010 * run-time through the temp{1-3}_type sysfs accessors if needed. */
2011
2012 /* Check if voltage monitors are reset manually or by some reason */
2013 tmp = it87_read_value(data, IT87_REG_VIN_ENABLE);
2014 if ((tmp & 0xff) == 0) {
2015 /* Enable all voltage monitors */
2016 it87_write_value(data, IT87_REG_VIN_ENABLE, 0xff);
2017 }
2018
2019 /* Check if tachometers are reset manually or by some reason */
2020 mask = 0x70 & ~(sio_data->skip_fan << 4);
2021 data->fan_main_ctrl = it87_read_value(data, IT87_REG_FAN_MAIN_CTRL);
2022 if ((data->fan_main_ctrl & mask) == 0) {
2023 /* Enable all fan tachometers */
2024 data->fan_main_ctrl |= mask;
2025 it87_write_value(data, IT87_REG_FAN_MAIN_CTRL,
2026 data->fan_main_ctrl);
2027 }
2028 data->has_fan = (data->fan_main_ctrl >> 4) & 0x07;
2029
2030 /* Set tachometers to 16-bit mode if needed */
2031 if (has_16bit_fans(data)) {
2032 tmp = it87_read_value(data, IT87_REG_FAN_16BIT);
2033 if (~tmp & 0x07 & data->has_fan) {
2034 dev_dbg(&pdev->dev,
2035 "Setting fan1-3 to 16-bit mode\n");
2036 it87_write_value(data, IT87_REG_FAN_16BIT,
2037 tmp | 0x07);
2038 }
2039 /* IT8705F only supports three fans. */
2040 if (data->type != it87) {
2041 if (tmp & (1 << 4))
2042 data->has_fan |= (1 << 3); /* fan4 enabled */
2043 if (tmp & (1 << 5))
2044 data->has_fan |= (1 << 4); /* fan5 enabled */
2045 }
2046 }
2047
2048 /* Fan input pins may be used for alternative functions */
2049 data->has_fan &= ~sio_data->skip_fan;
2050
2051 /* Start monitoring */
2052 it87_write_value(data, IT87_REG_CONFIG,
2053 (it87_read_value(data, IT87_REG_CONFIG) & 0x36)
2054 | (update_vbat ? 0x41 : 0x01));
2055 }
2056
2057 static void it87_update_pwm_ctrl(struct it87_data *data, int nr)
2058 {
2059 data->pwm_ctrl[nr] = it87_read_value(data, IT87_REG_PWM(nr));
2060 if (data->type == it8721) {
2061 data->pwm_temp_map[nr] = data->pwm_ctrl[nr] & 0x03;
2062 data->pwm_duty[nr] = it87_read_value(data,
2063 IT87_REG_PWM_DUTY(nr));
2064 } else {
2065 if (data->pwm_ctrl[nr] & 0x80) /* Automatic mode */
2066 data->pwm_temp_map[nr] = data->pwm_ctrl[nr] & 0x03;
2067 else /* Manual mode */
2068 data->pwm_duty[nr] = data->pwm_ctrl[nr] & 0x7f;
2069 }
2070
2071 if (has_old_autopwm(data)) {
2072 int i;
2073
2074 for (i = 0; i < 5 ; i++)
2075 data->auto_temp[nr][i] = it87_read_value(data,
2076 IT87_REG_AUTO_TEMP(nr, i));
2077 for (i = 0; i < 3 ; i++)
2078 data->auto_pwm[nr][i] = it87_read_value(data,
2079 IT87_REG_AUTO_PWM(nr, i));
2080 }
2081 }
2082
2083 static struct it87_data *it87_update_device(struct device *dev)
2084 {
2085 struct it87_data *data = dev_get_drvdata(dev);
2086 int i;
2087
2088 mutex_lock(&data->update_lock);
2089
2090 if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
2091 || !data->valid) {
2092 if (update_vbat) {
2093 /* Cleared after each update, so reenable. Value
2094 returned by this read will be previous value */
2095 it87_write_value(data, IT87_REG_CONFIG,
2096 it87_read_value(data, IT87_REG_CONFIG) | 0x40);
2097 }
2098 for (i = 0; i <= 7; i++) {
2099 data->in[i] =
2100 it87_read_value(data, IT87_REG_VIN(i));
2101 data->in_min[i] =
2102 it87_read_value(data, IT87_REG_VIN_MIN(i));
2103 data->in_max[i] =
2104 it87_read_value(data, IT87_REG_VIN_MAX(i));
2105 }
2106 /* in8 (battery) has no limit registers */
2107 data->in[8] = it87_read_value(data, IT87_REG_VIN(8));
2108
2109 for (i = 0; i < 5; i++) {
2110 /* Skip disabled fans */
2111 if (!(data->has_fan & (1 << i)))
2112 continue;
2113
2114 data->fan_min[i] =
2115 it87_read_value(data, IT87_REG_FAN_MIN[i]);
2116 data->fan[i] = it87_read_value(data,
2117 IT87_REG_FAN[i]);
2118 /* Add high byte if in 16-bit mode */
2119 if (has_16bit_fans(data)) {
2120 data->fan[i] |= it87_read_value(data,
2121 IT87_REG_FANX[i]) << 8;
2122 data->fan_min[i] |= it87_read_value(data,
2123 IT87_REG_FANX_MIN[i]) << 8;
2124 }
2125 }
2126 for (i = 0; i < 3; i++) {
2127 data->temp[i] =
2128 it87_read_value(data, IT87_REG_TEMP(i));
2129 data->temp_high[i] =
2130 it87_read_value(data, IT87_REG_TEMP_HIGH(i));
2131 data->temp_low[i] =
2132 it87_read_value(data, IT87_REG_TEMP_LOW(i));
2133 }
2134
2135 /* Newer chips don't have clock dividers */
2136 if ((data->has_fan & 0x07) && !has_16bit_fans(data)) {
2137 i = it87_read_value(data, IT87_REG_FAN_DIV);
2138 data->fan_div[0] = i & 0x07;
2139 data->fan_div[1] = (i >> 3) & 0x07;
2140 data->fan_div[2] = (i & 0x40) ? 3 : 1;
2141 }
2142
2143 data->alarms =
2144 it87_read_value(data, IT87_REG_ALARM1) |
2145 (it87_read_value(data, IT87_REG_ALARM2) << 8) |
2146 (it87_read_value(data, IT87_REG_ALARM3) << 16);
2147 data->beeps = it87_read_value(data, IT87_REG_BEEP_ENABLE);
2148
2149 data->fan_main_ctrl = it87_read_value(data,
2150 IT87_REG_FAN_MAIN_CTRL);
2151 data->fan_ctl = it87_read_value(data, IT87_REG_FAN_CTL);
2152 for (i = 0; i < 3; i++)
2153 it87_update_pwm_ctrl(data, i);
2154
2155 data->sensor = it87_read_value(data, IT87_REG_TEMP_ENABLE);
2156 /* The 8705 does not have VID capability.
2157 The 8718 and later don't use IT87_REG_VID for the
2158 same purpose. */
2159 if (data->type == it8712 || data->type == it8716) {
2160 data->vid = it87_read_value(data, IT87_REG_VID);
2161 /* The older IT8712F revisions had only 5 VID pins,
2162 but we assume it is always safe to read 6 bits. */
2163 data->vid &= 0x3f;
2164 }
2165 data->last_updated = jiffies;
2166 data->valid = 1;
2167 }
2168
2169 mutex_unlock(&data->update_lock);
2170
2171 return data;
2172 }
2173
2174 static int __init it87_device_add(unsigned short address,
2175 const struct it87_sio_data *sio_data)
2176 {
2177 struct resource res = {
2178 .start = address + IT87_EC_OFFSET,
2179 .end = address + IT87_EC_OFFSET + IT87_EC_EXTENT - 1,
2180 .name = DRVNAME,
2181 .flags = IORESOURCE_IO,
2182 };
2183 int err;
2184
2185 err = acpi_check_resource_conflict(&res);
2186 if (err)
2187 goto exit;
2188
2189 pdev = platform_device_alloc(DRVNAME, address);
2190 if (!pdev) {
2191 err = -ENOMEM;
2192 pr_err("Device allocation failed\n");
2193 goto exit;
2194 }
2195
2196 err = platform_device_add_resources(pdev, &res, 1);
2197 if (err) {
2198 pr_err("Device resource addition failed (%d)\n", err);
2199 goto exit_device_put;
2200 }
2201
2202 err = platform_device_add_data(pdev, sio_data,
2203 sizeof(struct it87_sio_data));
2204 if (err) {
2205 pr_err("Platform data allocation failed\n");
2206 goto exit_device_put;
2207 }
2208
2209 err = platform_device_add(pdev);
2210 if (err) {
2211 pr_err("Device addition failed (%d)\n", err);
2212 goto exit_device_put;
2213 }
2214
2215 return 0;
2216
2217 exit_device_put:
2218 platform_device_put(pdev);
2219 exit:
2220 return err;
2221 }
2222
2223 static int __init sm_it87_init(void)
2224 {
2225 int err;
2226 unsigned short isa_address = 0;
2227 struct it87_sio_data sio_data;
2228
2229 memset(&sio_data, 0, sizeof(struct it87_sio_data));
2230 err = it87_find(&isa_address, &sio_data);
2231 if (err)
2232 return err;
2233 err = platform_driver_register(&it87_driver);
2234 if (err)
2235 return err;
2236
2237 err = it87_device_add(isa_address, &sio_data);
2238 if (err) {
2239 platform_driver_unregister(&it87_driver);
2240 return err;
2241 }
2242
2243 return 0;
2244 }
2245
2246 static void __exit sm_it87_exit(void)
2247 {
2248 platform_device_unregister(pdev);
2249 platform_driver_unregister(&it87_driver);
2250 }
2251
2252
2253 MODULE_AUTHOR("Chris Gauthron, "
2254 "Jean Delvare <khali@linux-fr.org>");
2255 MODULE_DESCRIPTION("IT8705F/IT871xF/IT872xF hardware monitoring driver");
2256 module_param(update_vbat, bool, 0);
2257 MODULE_PARM_DESC(update_vbat, "Update vbat if set else return powerup value");
2258 module_param(fix_pwm_polarity, bool, 0);
2259 MODULE_PARM_DESC(fix_pwm_polarity,
2260 "Force PWM polarity to active high (DANGEROUS)");
2261 MODULE_LICENSE("GPL");
2262
2263 module_init(sm_it87_init);
2264 module_exit(sm_it87_exit);
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree