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hwmon: (it87) Add support for IT8782F and IT8783E/F
[linux-2.6/libata-dev.git] / drivers / hwmon / it87.c
blobaebac1334ff60a07fa80a7cef170fdebd68aefcf
1 /*
2 * it87.c - Part of lm_sensors, Linux kernel modules for hardware
3 * monitoring.
4 *
5 * The IT8705F is an LPC-based Super I/O part that contains UARTs, a
6 * parallel port, an IR port, a MIDI port, a floppy controller, etc., in
7 * addition to an Environment Controller (Enhanced Hardware Monitor and
8 * Fan Controller)
9 *
10 * This driver supports only the Environment Controller in the IT8705F and
11 * similar parts. The other devices are supported by different drivers.
12 *
13 * Supports: IT8705F Super I/O chip w/LPC interface
14 * IT8712F Super I/O chip w/LPC interface
15 * IT8716F Super I/O chip w/LPC interface
16 * IT8718F Super I/O chip w/LPC interface
17 * IT8720F Super I/O chip w/LPC interface
18 * IT8721F Super I/O chip w/LPC interface
19 * IT8726F Super I/O chip w/LPC interface
20 * IT8728F Super I/O chip w/LPC interface
21 * IT8758E Super I/O chip w/LPC interface
22 * IT8782F Super I/O chip w/LPC interface
23 * IT8783E/F Super I/O chip w/LPC interface
24 * Sis950 A clone of the IT8705F
25 *
26 * Copyright (C) 2001 Chris Gauthron
27 * Copyright (C) 2005-2010 Jean Delvare <khali@linux-fr.org>
28 *
29 * This program is free software; you can redistribute it and/or modify
30 * it under the terms of the GNU General Public License as published by
31 * the Free Software Foundation; either version 2 of the License, or
32 * (at your option) any later version.
33 *
34 * This program is distributed in the hope that it will be useful,
35 * but WITHOUT ANY WARRANTY; without even the implied warranty of
36 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
37 * GNU General Public License for more details.
38 *
39 * You should have received a copy of the GNU General Public License
40 * along with this program; if not, write to the Free Software
41 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
42 */
43
44 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
45
46 #include <linux/module.h>
47 #include <linux/init.h>
48 #include <linux/slab.h>
49 #include <linux/jiffies.h>
50 #include <linux/platform_device.h>
51 #include <linux/hwmon.h>
52 #include <linux/hwmon-sysfs.h>
53 #include <linux/hwmon-vid.h>
54 #include <linux/err.h>
55 #include <linux/mutex.h>
56 #include <linux/sysfs.h>
57 #include <linux/string.h>
58 #include <linux/dmi.h>
59 #include <linux/acpi.h>
60 #include <linux/io.h>
61
62 #define DRVNAME "it87"
63
64 enum chips { it87, it8712, it8716, it8718, it8720, it8721, it8728, it8782,
65 it8783 };
66
67 static unsigned short force_id;
68 module_param(force_id, ushort, 0);
69 MODULE_PARM_DESC(force_id, "Override the detected device ID");
70
71 static struct platform_device *pdev;
72
73 #define REG 0x2e /* The register to read/write */
74 #define DEV 0x07 /* Register: Logical device select */
75 #define VAL 0x2f /* The value to read/write */
76 #define PME 0x04 /* The device with the fan registers in it */
77
78 /* The device with the IT8718F/IT8720F VID value in it */
79 #define GPIO 0x07
80
81 #define DEVID 0x20 /* Register: Device ID */
82 #define DEVREV 0x22 /* Register: Device Revision */
83
84 static inline int superio_inb(int reg)
85 {
86 outb(reg, REG);
87 return inb(VAL);
88 }
89
90 static inline void superio_outb(int reg, int val)
91 {
92 outb(reg, REG);
93 outb(val, VAL);
94 }
95
96 static int superio_inw(int reg)
97 {
98 int val;
99 outb(reg++, REG);
100 val = inb(VAL) << 8;
101 outb(reg, REG);
102 val |= inb(VAL);
103 return val;
104 }
105
106 static inline void superio_select(int ldn)
107 {
108 outb(DEV, REG);
109 outb(ldn, VAL);
110 }
111
112 static inline int superio_enter(void)
113 {
114 /*
115 * Try to reserve REG and REG + 1 for exclusive access.
116 */
117 if (!request_muxed_region(REG, 2, DRVNAME))
118 return -EBUSY;
119
120 outb(0x87, REG);
121 outb(0x01, REG);
122 outb(0x55, REG);
123 outb(0x55, REG);
124 return 0;
125 }
126
127 static inline void superio_exit(void)
128 {
129 outb(0x02, REG);
130 outb(0x02, VAL);
131 release_region(REG, 2);
132 }
133
134 /* Logical device 4 registers */
135 #define IT8712F_DEVID 0x8712
136 #define IT8705F_DEVID 0x8705
137 #define IT8716F_DEVID 0x8716
138 #define IT8718F_DEVID 0x8718
139 #define IT8720F_DEVID 0x8720
140 #define IT8721F_DEVID 0x8721
141 #define IT8726F_DEVID 0x8726
142 #define IT8728F_DEVID 0x8728
143 #define IT8782F_DEVID 0x8782
144 #define IT8783E_DEVID 0x8783
145 #define IT87_ACT_REG 0x30
146 #define IT87_BASE_REG 0x60
147
148 /* Logical device 7 registers (IT8712F and later) */
149 #define IT87_SIO_GPIO1_REG 0x25
150 #define IT87_SIO_GPIO3_REG 0x27
151 #define IT87_SIO_GPIO5_REG 0x29
152 #define IT87_SIO_PINX1_REG 0x2a /* Pin selection */
153 #define IT87_SIO_PINX2_REG 0x2c /* Pin selection */
154 #define IT87_SIO_SPI_REG 0xef /* SPI function pin select */
155 #define IT87_SIO_VID_REG 0xfc /* VID value */
156 #define IT87_SIO_BEEP_PIN_REG 0xf6 /* Beep pin mapping */
157
158 /* Update battery voltage after every reading if true */
159 static bool update_vbat;
160
161 /* Not all BIOSes properly configure the PWM registers */
162 static bool fix_pwm_polarity;
163
164 /* Many IT87 constants specified below */
165
166 /* Length of ISA address segment */
167 #define IT87_EXTENT 8
168
169 /* Length of ISA address segment for Environmental Controller */
170 #define IT87_EC_EXTENT 2
171
172 /* Offset of EC registers from ISA base address */
173 #define IT87_EC_OFFSET 5
174
175 /* Where are the ISA address/data registers relative to the EC base address */
176 #define IT87_ADDR_REG_OFFSET 0
177 #define IT87_DATA_REG_OFFSET 1
178
179 /*----- The IT87 registers -----*/
180
181 #define IT87_REG_CONFIG 0x00
182
183 #define IT87_REG_ALARM1 0x01
184 #define IT87_REG_ALARM2 0x02
185 #define IT87_REG_ALARM3 0x03
186
187 /*
188 * The IT8718F and IT8720F have the VID value in a different register, in
189 * Super-I/O configuration space.
190 */
191 #define IT87_REG_VID 0x0a
192 /*
193 * The IT8705F and IT8712F earlier than revision 0x08 use register 0x0b
194 * for fan divisors. Later IT8712F revisions must use 16-bit tachometer
195 * mode.
196 */
197 #define IT87_REG_FAN_DIV 0x0b
198 #define IT87_REG_FAN_16BIT 0x0c
199
200 /* Monitors: 9 voltage (0 to 7, battery), 3 temp (1 to 3), 3 fan (1 to 3) */
201
202 static const u8 IT87_REG_FAN[] = { 0x0d, 0x0e, 0x0f, 0x80, 0x82 };
203 static const u8 IT87_REG_FAN_MIN[] = { 0x10, 0x11, 0x12, 0x84, 0x86 };
204 static const u8 IT87_REG_FANX[] = { 0x18, 0x19, 0x1a, 0x81, 0x83 };
205 static const u8 IT87_REG_FANX_MIN[] = { 0x1b, 0x1c, 0x1d, 0x85, 0x87 };
206 #define IT87_REG_FAN_MAIN_CTRL 0x13
207 #define IT87_REG_FAN_CTL 0x14
208 #define IT87_REG_PWM(nr) (0x15 + (nr))
209 #define IT87_REG_PWM_DUTY(nr) (0x63 + (nr) * 8)
210
211 #define IT87_REG_VIN(nr) (0x20 + (nr))
212 #define IT87_REG_TEMP(nr) (0x29 + (nr))
213
214 #define IT87_REG_VIN_MAX(nr) (0x30 + (nr) * 2)
215 #define IT87_REG_VIN_MIN(nr) (0x31 + (nr) * 2)
216 #define IT87_REG_TEMP_HIGH(nr) (0x40 + (nr) * 2)
217 #define IT87_REG_TEMP_LOW(nr) (0x41 + (nr) * 2)
218
219 #define IT87_REG_VIN_ENABLE 0x50
220 #define IT87_REG_TEMP_ENABLE 0x51
221 #define IT87_REG_BEEP_ENABLE 0x5c
222
223 #define IT87_REG_CHIPID 0x58
224
225 #define IT87_REG_AUTO_TEMP(nr, i) (0x60 + (nr) * 8 + (i))
226 #define IT87_REG_AUTO_PWM(nr, i) (0x65 + (nr) * 8 + (i))
227
228
229 struct it87_sio_data {
230 enum chips type;
231 /* Values read from Super-I/O config space */
232 u8 revision;
233 u8 vid_value;
234 u8 beep_pin;
235 u8 internal; /* Internal sensors can be labeled */
236 /* Features skipped based on config or DMI */
237 u8 skip_vid;
238 u8 skip_fan;
239 u8 skip_pwm;
240 };
241
242 /*
243 * For each registered chip, we need to keep some data in memory.
244 * The structure is dynamically allocated.
245 */
246 struct it87_data {
247 struct device *hwmon_dev;
248 enum chips type;
249 u8 revision;
250
251 unsigned short addr;
252 const char *name;
253 struct mutex update_lock;
254 char valid; /* !=0 if following fields are valid */
255 unsigned long last_updated; /* In jiffies */
256
257 u16 in_scaled; /* Internal voltage sensors are scaled */
258 u8 in[9]; /* Register value */
259 u8 in_max[8]; /* Register value */
260 u8 in_min[8]; /* Register value */
261 u8 has_fan; /* Bitfield, fans enabled */
262 u16 fan[5]; /* Register values, possibly combined */
263 u16 fan_min[5]; /* Register values, possibly combined */
264 s8 temp[3]; /* Register value */
265 s8 temp_high[3]; /* Register value */
266 s8 temp_low[3]; /* Register value */
267 u8 sensor; /* Register value */
268 u8 fan_div[3]; /* Register encoding, shifted right */
269 u8 vid; /* Register encoding, combined */
270 u8 vrm;
271 u32 alarms; /* Register encoding, combined */
272 u8 beeps; /* Register encoding */
273 u8 fan_main_ctrl; /* Register value */
274 u8 fan_ctl; /* Register value */
275
276 /*
277 * The following 3 arrays correspond to the same registers up to
278 * the IT8720F. The meaning of bits 6-0 depends on the value of bit
279 * 7, and we want to preserve settings on mode changes, so we have
280 * to track all values separately.
281 * Starting with the IT8721F, the manual PWM duty cycles are stored
282 * in separate registers (8-bit values), so the separate tracking
283 * is no longer needed, but it is still done to keep the driver
284 * simple.
285 */
286 u8 pwm_ctrl[3]; /* Register value */
287 u8 pwm_duty[3]; /* Manual PWM value set by user */
288 u8 pwm_temp_map[3]; /* PWM to temp. chan. mapping (bits 1-0) */
289
290 /* Automatic fan speed control registers */
291 u8 auto_pwm[3][4]; /* [nr][3] is hard-coded */
292 s8 auto_temp[3][5]; /* [nr][0] is point1_temp_hyst */
293 };
294
295 static inline int has_12mv_adc(const struct it87_data *data)
296 {
297 /*
298 * IT8721F and later have a 12 mV ADC, also with internal scaling
299 * on selected inputs.
300 */
301 return data->type == it8721
302 || data->type == it8728;
303 }
304
305 static inline int has_newer_autopwm(const struct it87_data *data)
306 {
307 /*
308 * IT8721F and later have separate registers for the temperature
309 * mapping and the manual duty cycle.
310 */
311 return data->type == it8721
312 || data->type == it8728;
313 }
314
315 static int adc_lsb(const struct it87_data *data, int nr)
316 {
317 int lsb = has_12mv_adc(data) ? 12 : 16;
318 if (data->in_scaled & (1 << nr))
319 lsb <<= 1;
320 return lsb;
321 }
322
323 static u8 in_to_reg(const struct it87_data *data, int nr, long val)
324 {
325 val = DIV_ROUND_CLOSEST(val, adc_lsb(data, nr));
326 return SENSORS_LIMIT(val, 0, 255);
327 }
328
329 static int in_from_reg(const struct it87_data *data, int nr, int val)
330 {
331 return val * adc_lsb(data, nr);
332 }
333
334 static inline u8 FAN_TO_REG(long rpm, int div)
335 {
336 if (rpm == 0)
337 return 255;
338 rpm = SENSORS_LIMIT(rpm, 1, 1000000);
339 return SENSORS_LIMIT((1350000 + rpm * div / 2) / (rpm * div), 1,
340 254);
341 }
342
343 static inline u16 FAN16_TO_REG(long rpm)
344 {
345 if (rpm == 0)
346 return 0xffff;
347 return SENSORS_LIMIT((1350000 + rpm) / (rpm * 2), 1, 0xfffe);
348 }
349
350 #define FAN_FROM_REG(val, div) ((val) == 0 ? -1 : (val) == 255 ? 0 : \
351 1350000 / ((val) * (div)))
352 /* The divider is fixed to 2 in 16-bit mode */
353 #define FAN16_FROM_REG(val) ((val) == 0 ? -1 : (val) == 0xffff ? 0 : \
354 1350000 / ((val) * 2))
355
356 #define TEMP_TO_REG(val) (SENSORS_LIMIT(((val) < 0 ? (((val) - 500) / 1000) : \
357 ((val) + 500) / 1000), -128, 127))
358 #define TEMP_FROM_REG(val) ((val) * 1000)
359
360 static u8 pwm_to_reg(const struct it87_data *data, long val)
361 {
362 if (has_newer_autopwm(data))
363 return val;
364 else
365 return val >> 1;
366 }
367
368 static int pwm_from_reg(const struct it87_data *data, u8 reg)
369 {
370 if (has_newer_autopwm(data))
371 return reg;
372 else
373 return (reg & 0x7f) << 1;
374 }
375
376
377 static int DIV_TO_REG(int val)
378 {
379 int answer = 0;
380 while (answer < 7 && (val >>= 1))
381 answer++;
382 return answer;
383 }
384 #define DIV_FROM_REG(val) (1 << (val))
385
386 static const unsigned int pwm_freq[8] = {
387 48000000 / 128,
388 24000000 / 128,
389 12000000 / 128,
390 8000000 / 128,
391 6000000 / 128,
392 3000000 / 128,
393 1500000 / 128,
394 750000 / 128,
395 };
396
397 static inline int has_16bit_fans(const struct it87_data *data)
398 {
399 /*
400 * IT8705F Datasheet 0.4.1, 3h == Version G.
401 * IT8712F Datasheet 0.9.1, section 8.3.5 indicates 8h == Version J.
402 * These are the first revisions with 16-bit tachometer support.
403 */
404 return (data->type == it87 && data->revision >= 0x03)
405 || (data->type == it8712 && data->revision >= 0x08)
406 || data->type == it8716
407 || data->type == it8718
408 || data->type == it8720
409 || data->type == it8721
410 || data->type == it8728
411 || data->type == it8782
412 || data->type == it8783;
413 }
414
415 static inline int has_old_autopwm(const struct it87_data *data)
416 {
417 /*
418 * The old automatic fan speed control interface is implemented
419 * by IT8705F chips up to revision F and IT8712F chips up to
420 * revision G.
421 */
422 return (data->type == it87 && data->revision < 0x03)
423 || (data->type == it8712 && data->revision < 0x08);
424 }
425
426 static int it87_probe(struct platform_device *pdev);
427 static int __devexit it87_remove(struct platform_device *pdev);
428
429 static int it87_read_value(struct it87_data *data, u8 reg);
430 static void it87_write_value(struct it87_data *data, u8 reg, u8 value);
431 static struct it87_data *it87_update_device(struct device *dev);
432 static int it87_check_pwm(struct device *dev);
433 static void it87_init_device(struct platform_device *pdev);
434
435
436 static struct platform_driver it87_driver = {
437 .driver = {
438 .owner = THIS_MODULE,
439 .name = DRVNAME,
440 },
441 .probe = it87_probe,
442 .remove = __devexit_p(it87_remove),
443 };
444
445 static ssize_t show_in(struct device *dev, struct device_attribute *attr,
446 char *buf)
447 {
448 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
449 int nr = sensor_attr->index;
450
451 struct it87_data *data = it87_update_device(dev);
452 return sprintf(buf, "%d\n", in_from_reg(data, nr, data->in[nr]));
453 }
454
455 static ssize_t show_in_min(struct device *dev, struct device_attribute *attr,
456 char *buf)
457 {
458 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
459 int nr = sensor_attr->index;
460
461 struct it87_data *data = it87_update_device(dev);
462 return sprintf(buf, "%d\n", in_from_reg(data, nr, data->in_min[nr]));
463 }
464
465 static ssize_t show_in_max(struct device *dev, struct device_attribute *attr,
466 char *buf)
467 {
468 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
469 int nr = sensor_attr->index;
470
471 struct it87_data *data = it87_update_device(dev);
472 return sprintf(buf, "%d\n", in_from_reg(data, nr, data->in_max[nr]));
473 }
474
475 static ssize_t set_in_min(struct device *dev, struct device_attribute *attr,
476 const char *buf, size_t count)
477 {
478 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
479 int nr = sensor_attr->index;
480
481 struct it87_data *data = dev_get_drvdata(dev);
482 unsigned long val;
483
484 if (kstrtoul(buf, 10, &val) < 0)
485 return -EINVAL;
486
487 mutex_lock(&data->update_lock);
488 data->in_min[nr] = in_to_reg(data, nr, val);
489 it87_write_value(data, IT87_REG_VIN_MIN(nr),
490 data->in_min[nr]);
491 mutex_unlock(&data->update_lock);
492 return count;
493 }
494 static ssize_t set_in_max(struct device *dev, struct device_attribute *attr,
495 const char *buf, size_t count)
496 {
497 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
498 int nr = sensor_attr->index;
499
500 struct it87_data *data = dev_get_drvdata(dev);
501 unsigned long val;
502
503 if (kstrtoul(buf, 10, &val) < 0)
504 return -EINVAL;
505
506 mutex_lock(&data->update_lock);
507 data->in_max[nr] = in_to_reg(data, nr, val);
508 it87_write_value(data, IT87_REG_VIN_MAX(nr),
509 data->in_max[nr]);
510 mutex_unlock(&data->update_lock);
511 return count;
512 }
513
514 #define show_in_offset(offset) \
515 static SENSOR_DEVICE_ATTR(in##offset##_input, S_IRUGO, \
516 show_in, NULL, offset);
517
518 #define limit_in_offset(offset) \
519 static SENSOR_DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \
520 show_in_min, set_in_min, offset); \
521 static SENSOR_DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \
522 show_in_max, set_in_max, offset);
523
524 show_in_offset(0);
525 limit_in_offset(0);
526 show_in_offset(1);
527 limit_in_offset(1);
528 show_in_offset(2);
529 limit_in_offset(2);
530 show_in_offset(3);
531 limit_in_offset(3);
532 show_in_offset(4);
533 limit_in_offset(4);
534 show_in_offset(5);
535 limit_in_offset(5);
536 show_in_offset(6);
537 limit_in_offset(6);
538 show_in_offset(7);
539 limit_in_offset(7);
540 show_in_offset(8);
541
542 /* 3 temperatures */
543 static ssize_t show_temp(struct device *dev, struct device_attribute *attr,
544 char *buf)
545 {
546 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
547 int nr = sensor_attr->index;
548
549 struct it87_data *data = it87_update_device(dev);
550 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[nr]));
551 }
552 static ssize_t show_temp_max(struct device *dev, struct device_attribute *attr,
553 char *buf)
554 {
555 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
556 int nr = sensor_attr->index;
557
558 struct it87_data *data = it87_update_device(dev);
559 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_high[nr]));
560 }
561 static ssize_t show_temp_min(struct device *dev, struct device_attribute *attr,
562 char *buf)
563 {
564 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
565 int nr = sensor_attr->index;
566
567 struct it87_data *data = it87_update_device(dev);
568 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_low[nr]));
569 }
570 static ssize_t set_temp_max(struct device *dev, struct device_attribute *attr,
571 const char *buf, size_t count)
572 {
573 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
574 int nr = sensor_attr->index;
575
576 struct it87_data *data = dev_get_drvdata(dev);
577 long val;
578
579 if (kstrtol(buf, 10, &val) < 0)
580 return -EINVAL;
581
582 mutex_lock(&data->update_lock);
583 data->temp_high[nr] = TEMP_TO_REG(val);
584 it87_write_value(data, IT87_REG_TEMP_HIGH(nr), data->temp_high[nr]);
585 mutex_unlock(&data->update_lock);
586 return count;
587 }
588 static ssize_t set_temp_min(struct device *dev, struct device_attribute *attr,
589 const char *buf, size_t count)
590 {
591 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
592 int nr = sensor_attr->index;
593
594 struct it87_data *data = dev_get_drvdata(dev);
595 long val;
596
597 if (kstrtol(buf, 10, &val) < 0)
598 return -EINVAL;
599
600 mutex_lock(&data->update_lock);
601 data->temp_low[nr] = TEMP_TO_REG(val);
602 it87_write_value(data, IT87_REG_TEMP_LOW(nr), data->temp_low[nr]);
603 mutex_unlock(&data->update_lock);
604 return count;
605 }
606 #define show_temp_offset(offset) \
607 static SENSOR_DEVICE_ATTR(temp##offset##_input, S_IRUGO, \
608 show_temp, NULL, offset - 1); \
609 static SENSOR_DEVICE_ATTR(temp##offset##_max, S_IRUGO | S_IWUSR, \
610 show_temp_max, set_temp_max, offset - 1); \
611 static SENSOR_DEVICE_ATTR(temp##offset##_min, S_IRUGO | S_IWUSR, \
612 show_temp_min, set_temp_min, offset - 1);
613
614 show_temp_offset(1);
615 show_temp_offset(2);
616 show_temp_offset(3);
617
618 static ssize_t show_sensor(struct device *dev, struct device_attribute *attr,
619 char *buf)
620 {
621 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
622 int nr = sensor_attr->index;
623 struct it87_data *data = it87_update_device(dev);
624 u8 reg = data->sensor; /* In case value is updated while used */
625
626 if (reg & (1 << nr))
627 return sprintf(buf, "3\n"); /* thermal diode */
628 if (reg & (8 << nr))
629 return sprintf(buf, "4\n"); /* thermistor */
630 return sprintf(buf, "0\n"); /* disabled */
631 }
632 static ssize_t set_sensor(struct device *dev, struct device_attribute *attr,
633 const char *buf, size_t count)
634 {
635 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
636 int nr = sensor_attr->index;
637
638 struct it87_data *data = dev_get_drvdata(dev);
639 long val;
640 u8 reg;
641
642 if (kstrtol(buf, 10, &val) < 0)
643 return -EINVAL;
644
645 reg = it87_read_value(data, IT87_REG_TEMP_ENABLE);
646 reg &= ~(1 << nr);
647 reg &= ~(8 << nr);
648 if (val == 2) { /* backwards compatibility */
649 dev_warn(dev, "Sensor type 2 is deprecated, please use 4 "
650 "instead\n");
651 val = 4;
652 }
653 /* 3 = thermal diode; 4 = thermistor; 0 = disabled */
654 if (val == 3)
655 reg |= 1 << nr;
656 else if (val == 4)
657 reg |= 8 << nr;
658 else if (val != 0)
659 return -EINVAL;
660
661 mutex_lock(&data->update_lock);
662 data->sensor = reg;
663 it87_write_value(data, IT87_REG_TEMP_ENABLE, data->sensor);
664 data->valid = 0; /* Force cache refresh */
665 mutex_unlock(&data->update_lock);
666 return count;
667 }
668 #define show_sensor_offset(offset) \
669 static SENSOR_DEVICE_ATTR(temp##offset##_type, S_IRUGO | S_IWUSR, \
670 show_sensor, set_sensor, offset - 1);
671
672 show_sensor_offset(1);
673 show_sensor_offset(2);
674 show_sensor_offset(3);
675
676 /* 3 Fans */
677
678 static int pwm_mode(const struct it87_data *data, int nr)
679 {
680 int ctrl = data->fan_main_ctrl & (1 << nr);
681
682 if (ctrl == 0) /* Full speed */
683 return 0;
684 if (data->pwm_ctrl[nr] & 0x80) /* Automatic mode */
685 return 2;
686 else /* Manual mode */
687 return 1;
688 }
689
690 static ssize_t show_fan(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", FAN_FROM_REG(data->fan[nr],
698 DIV_FROM_REG(data->fan_div[nr])));
699 }
700 static ssize_t show_fan_min(struct device *dev, struct device_attribute *attr,
701 char *buf)
702 {
703 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
704 int nr = sensor_attr->index;
705
706 struct it87_data *data = it87_update_device(dev);
707 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[nr],
708 DIV_FROM_REG(data->fan_div[nr])));
709 }
710 static ssize_t show_fan_div(struct device *dev, struct device_attribute *attr,
711 char *buf)
712 {
713 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
714 int nr = sensor_attr->index;
715
716 struct it87_data *data = it87_update_device(dev);
717 return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr]));
718 }
719 static ssize_t show_pwm_enable(struct device *dev,
720 struct device_attribute *attr, char *buf)
721 {
722 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
723 int nr = sensor_attr->index;
724
725 struct it87_data *data = it87_update_device(dev);
726 return sprintf(buf, "%d\n", pwm_mode(data, nr));
727 }
728 static ssize_t show_pwm(struct device *dev, struct device_attribute *attr,
729 char *buf)
730 {
731 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
732 int nr = sensor_attr->index;
733
734 struct it87_data *data = it87_update_device(dev);
735 return sprintf(buf, "%d\n",
736 pwm_from_reg(data, data->pwm_duty[nr]));
737 }
738 static ssize_t show_pwm_freq(struct device *dev, struct device_attribute *attr,
739 char *buf)
740 {
741 struct it87_data *data = it87_update_device(dev);
742 int index = (data->fan_ctl >> 4) & 0x07;
743
744 return sprintf(buf, "%u\n", pwm_freq[index]);
745 }
746 static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr,
747 const char *buf, size_t count)
748 {
749 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
750 int nr = sensor_attr->index;
751
752 struct it87_data *data = dev_get_drvdata(dev);
753 long val;
754 u8 reg;
755
756 if (kstrtol(buf, 10, &val) < 0)
757 return -EINVAL;
758
759 mutex_lock(&data->update_lock);
760 reg = it87_read_value(data, IT87_REG_FAN_DIV);
761 switch (nr) {
762 case 0:
763 data->fan_div[nr] = reg & 0x07;
764 break;
765 case 1:
766 data->fan_div[nr] = (reg >> 3) & 0x07;
767 break;
768 case 2:
769 data->fan_div[nr] = (reg & 0x40) ? 3 : 1;
770 break;
771 }
772
773 data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr]));
774 it87_write_value(data, IT87_REG_FAN_MIN[nr], data->fan_min[nr]);
775 mutex_unlock(&data->update_lock);
776 return count;
777 }
778 static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr,
779 const char *buf, size_t count)
780 {
781 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
782 int nr = sensor_attr->index;
783
784 struct it87_data *data = dev_get_drvdata(dev);
785 unsigned long val;
786 int min;
787 u8 old;
788
789 if (kstrtoul(buf, 10, &val) < 0)
790 return -EINVAL;
791
792 mutex_lock(&data->update_lock);
793 old = it87_read_value(data, IT87_REG_FAN_DIV);
794
795 /* Save fan min limit */
796 min = FAN_FROM_REG(data->fan_min[nr], DIV_FROM_REG(data->fan_div[nr]));
797
798 switch (nr) {
799 case 0:
800 case 1:
801 data->fan_div[nr] = DIV_TO_REG(val);
802 break;
803 case 2:
804 if (val < 8)
805 data->fan_div[nr] = 1;
806 else
807 data->fan_div[nr] = 3;
808 }
809 val = old & 0x80;
810 val |= (data->fan_div[0] & 0x07);
811 val |= (data->fan_div[1] & 0x07) << 3;
812 if (data->fan_div[2] == 3)
813 val |= 0x1 << 6;
814 it87_write_value(data, IT87_REG_FAN_DIV, val);
815
816 /* Restore fan min limit */
817 data->fan_min[nr] = FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr]));
818 it87_write_value(data, IT87_REG_FAN_MIN[nr], data->fan_min[nr]);
819
820 mutex_unlock(&data->update_lock);
821 return count;
822 }
823
824 /* Returns 0 if OK, -EINVAL otherwise */
825 static int check_trip_points(struct device *dev, int nr)
826 {
827 const struct it87_data *data = dev_get_drvdata(dev);
828 int i, err = 0;
829
830 if (has_old_autopwm(data)) {
831 for (i = 0; i < 3; i++) {
832 if (data->auto_temp[nr][i] > data->auto_temp[nr][i + 1])
833 err = -EINVAL;
834 }
835 for (i = 0; i < 2; i++) {
836 if (data->auto_pwm[nr][i] > data->auto_pwm[nr][i + 1])
837 err = -EINVAL;
838 }
839 }
840
841 if (err) {
842 dev_err(dev, "Inconsistent trip points, not switching to "
843 "automatic mode\n");
844 dev_err(dev, "Adjust the trip points and try again\n");
845 }
846 return err;
847 }
848
849 static ssize_t set_pwm_enable(struct device *dev,
850 struct device_attribute *attr, const char *buf, size_t count)
851 {
852 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
853 int nr = sensor_attr->index;
854
855 struct it87_data *data = dev_get_drvdata(dev);
856 long val;
857
858 if (kstrtol(buf, 10, &val) < 0 || val < 0 || val > 2)
859 return -EINVAL;
860
861 /* Check trip points before switching to automatic mode */
862 if (val == 2) {
863 if (check_trip_points(dev, nr) < 0)
864 return -EINVAL;
865 }
866
867 mutex_lock(&data->update_lock);
868
869 if (val == 0) {
870 int tmp;
871 /* make sure the fan is on when in on/off mode */
872 tmp = it87_read_value(data, IT87_REG_FAN_CTL);
873 it87_write_value(data, IT87_REG_FAN_CTL, tmp | (1 << nr));
874 /* set on/off mode */
875 data->fan_main_ctrl &= ~(1 << nr);
876 it87_write_value(data, IT87_REG_FAN_MAIN_CTRL,
877 data->fan_main_ctrl);
878 } else {
879 if (val == 1) /* Manual mode */
880 data->pwm_ctrl[nr] = has_newer_autopwm(data) ?
881 data->pwm_temp_map[nr] :
882 data->pwm_duty[nr];
883 else /* Automatic mode */
884 data->pwm_ctrl[nr] = 0x80 | data->pwm_temp_map[nr];
885 it87_write_value(data, IT87_REG_PWM(nr), data->pwm_ctrl[nr]);
886 /* set SmartGuardian mode */
887 data->fan_main_ctrl |= (1 << nr);
888 it87_write_value(data, IT87_REG_FAN_MAIN_CTRL,
889 data->fan_main_ctrl);
890 }
891
892 mutex_unlock(&data->update_lock);
893 return count;
894 }
895 static ssize_t set_pwm(struct device *dev, struct device_attribute *attr,
896 const char *buf, size_t count)
897 {
898 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
899 int nr = sensor_attr->index;
900
901 struct it87_data *data = dev_get_drvdata(dev);
902 long val;
903
904 if (kstrtol(buf, 10, &val) < 0 || val < 0 || val > 255)
905 return -EINVAL;
906
907 mutex_lock(&data->update_lock);
908 if (has_newer_autopwm(data)) {
909 /*
910 * If we are in automatic mode, the PWM duty cycle register
911 * is read-only so we can't write the value.
912 */
913 if (data->pwm_ctrl[nr] & 0x80) {
914 mutex_unlock(&data->update_lock);
915 return -EBUSY;
916 }
917 data->pwm_duty[nr] = pwm_to_reg(data, val);
918 it87_write_value(data, IT87_REG_PWM_DUTY(nr),
919 data->pwm_duty[nr]);
920 } else {
921 data->pwm_duty[nr] = pwm_to_reg(data, val);
922 /*
923 * If we are in manual mode, write the duty cycle immediately;
924 * otherwise, just store it for later use.
925 */
926 if (!(data->pwm_ctrl[nr] & 0x80)) {
927 data->pwm_ctrl[nr] = data->pwm_duty[nr];
928 it87_write_value(data, IT87_REG_PWM(nr),
929 data->pwm_ctrl[nr]);
930 }
931 }
932 mutex_unlock(&data->update_lock);
933 return count;
934 }
935 static ssize_t set_pwm_freq(struct device *dev,
936 struct device_attribute *attr, const char *buf, size_t count)
937 {
938 struct it87_data *data = dev_get_drvdata(dev);
939 unsigned long val;
940 int i;
941
942 if (kstrtoul(buf, 10, &val) < 0)
943 return -EINVAL;
944
945 /* Search for the nearest available frequency */
946 for (i = 0; i < 7; i++) {
947 if (val > (pwm_freq[i] + pwm_freq[i+1]) / 2)
948 break;
949 }
950
951 mutex_lock(&data->update_lock);
952 data->fan_ctl = it87_read_value(data, IT87_REG_FAN_CTL) & 0x8f;
953 data->fan_ctl |= i << 4;
954 it87_write_value(data, IT87_REG_FAN_CTL, data->fan_ctl);
955 mutex_unlock(&data->update_lock);
956
957 return count;
958 }
959 static ssize_t show_pwm_temp_map(struct device *dev,
960 struct device_attribute *attr, char *buf)
961 {
962 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
963 int nr = sensor_attr->index;
964
965 struct it87_data *data = it87_update_device(dev);
966 int map;
967
968 if (data->pwm_temp_map[nr] < 3)
969 map = 1 << data->pwm_temp_map[nr];
970 else
971 map = 0; /* Should never happen */
972 return sprintf(buf, "%d\n", map);
973 }
974 static ssize_t set_pwm_temp_map(struct device *dev,
975 struct device_attribute *attr, const char *buf, size_t count)
976 {
977 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
978 int nr = sensor_attr->index;
979
980 struct it87_data *data = dev_get_drvdata(dev);
981 long val;
982 u8 reg;
983
984 /*
985 * This check can go away if we ever support automatic fan speed
986 * control on newer chips.
987 */
988 if (!has_old_autopwm(data)) {
989 dev_notice(dev, "Mapping change disabled for safety reasons\n");
990 return -EINVAL;
991 }
992
993 if (kstrtol(buf, 10, &val) < 0)
994 return -EINVAL;
995
996 switch (val) {
997 case (1 << 0):
998 reg = 0x00;
999 break;
1000 case (1 << 1):
1001 reg = 0x01;
1002 break;
1003 case (1 << 2):
1004 reg = 0x02;
1005 break;
1006 default:
1007 return -EINVAL;
1008 }
1009
1010 mutex_lock(&data->update_lock);
1011 data->pwm_temp_map[nr] = reg;
1012 /*
1013 * If we are in automatic mode, write the temp mapping immediately;
1014 * otherwise, just store it for later use.
1015 */
1016 if (data->pwm_ctrl[nr] & 0x80) {
1017 data->pwm_ctrl[nr] = 0x80 | data->pwm_temp_map[nr];
1018 it87_write_value(data, IT87_REG_PWM(nr), data->pwm_ctrl[nr]);
1019 }
1020 mutex_unlock(&data->update_lock);
1021 return count;
1022 }
1023
1024 static ssize_t show_auto_pwm(struct device *dev,
1025 struct device_attribute *attr, char *buf)
1026 {
1027 struct it87_data *data = it87_update_device(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
1033 return sprintf(buf, "%d\n",
1034 pwm_from_reg(data, data->auto_pwm[nr][point]));
1035 }
1036
1037 static ssize_t set_auto_pwm(struct device *dev,
1038 struct device_attribute *attr, const char *buf, size_t count)
1039 {
1040 struct it87_data *data = dev_get_drvdata(dev);
1041 struct sensor_device_attribute_2 *sensor_attr =
1042 to_sensor_dev_attr_2(attr);
1043 int nr = sensor_attr->nr;
1044 int point = sensor_attr->index;
1045 long val;
1046
1047 if (kstrtol(buf, 10, &val) < 0 || val < 0 || val > 255)
1048 return -EINVAL;
1049
1050 mutex_lock(&data->update_lock);
1051 data->auto_pwm[nr][point] = pwm_to_reg(data, val);
1052 it87_write_value(data, IT87_REG_AUTO_PWM(nr, point),
1053 data->auto_pwm[nr][point]);
1054 mutex_unlock(&data->update_lock);
1055 return count;
1056 }
1057
1058 static ssize_t show_auto_temp(struct device *dev,
1059 struct device_attribute *attr, char *buf)
1060 {
1061 struct it87_data *data = it87_update_device(dev);
1062 struct sensor_device_attribute_2 *sensor_attr =
1063 to_sensor_dev_attr_2(attr);
1064 int nr = sensor_attr->nr;
1065 int point = sensor_attr->index;
1066
1067 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->auto_temp[nr][point]));
1068 }
1069
1070 static ssize_t set_auto_temp(struct device *dev,
1071 struct device_attribute *attr, const char *buf, size_t count)
1072 {
1073 struct it87_data *data = dev_get_drvdata(dev);
1074 struct sensor_device_attribute_2 *sensor_attr =
1075 to_sensor_dev_attr_2(attr);
1076 int nr = sensor_attr->nr;
1077 int point = sensor_attr->index;
1078 long val;
1079
1080 if (kstrtol(buf, 10, &val) < 0 || val < -128000 || val > 127000)
1081 return -EINVAL;
1082
1083 mutex_lock(&data->update_lock);
1084 data->auto_temp[nr][point] = TEMP_TO_REG(val);
1085 it87_write_value(data, IT87_REG_AUTO_TEMP(nr, point),
1086 data->auto_temp[nr][point]);
1087 mutex_unlock(&data->update_lock);
1088 return count;
1089 }
1090
1091 #define show_fan_offset(offset) \
1092 static SENSOR_DEVICE_ATTR(fan##offset##_input, S_IRUGO, \
1093 show_fan, NULL, offset - 1); \
1094 static SENSOR_DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \
1095 show_fan_min, set_fan_min, offset - 1); \
1096 static SENSOR_DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR, \
1097 show_fan_div, set_fan_div, offset - 1);
1098
1099 show_fan_offset(1);
1100 show_fan_offset(2);
1101 show_fan_offset(3);
1102
1103 #define show_pwm_offset(offset) \
1104 static SENSOR_DEVICE_ATTR(pwm##offset##_enable, S_IRUGO | S_IWUSR, \
1105 show_pwm_enable, set_pwm_enable, offset - 1); \
1106 static SENSOR_DEVICE_ATTR(pwm##offset, S_IRUGO | S_IWUSR, \
1107 show_pwm, set_pwm, offset - 1); \
1108 static DEVICE_ATTR(pwm##offset##_freq, \
1109 (offset == 1 ? S_IRUGO | S_IWUSR : S_IRUGO), \
1110 show_pwm_freq, (offset == 1 ? set_pwm_freq : NULL)); \
1111 static SENSOR_DEVICE_ATTR(pwm##offset##_auto_channels_temp, \
1112 S_IRUGO | S_IWUSR, show_pwm_temp_map, set_pwm_temp_map, \
1113 offset - 1); \
1114 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point1_pwm, \
1115 S_IRUGO | S_IWUSR, show_auto_pwm, set_auto_pwm, \
1116 offset - 1, 0); \
1117 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point2_pwm, \
1118 S_IRUGO | S_IWUSR, show_auto_pwm, set_auto_pwm, \
1119 offset - 1, 1); \
1120 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point3_pwm, \
1121 S_IRUGO | S_IWUSR, show_auto_pwm, set_auto_pwm, \
1122 offset - 1, 2); \
1123 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point4_pwm, \
1124 S_IRUGO, show_auto_pwm, NULL, offset - 1, 3); \
1125 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point1_temp, \
1126 S_IRUGO | S_IWUSR, show_auto_temp, set_auto_temp, \
1127 offset - 1, 1); \
1128 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point1_temp_hyst, \
1129 S_IRUGO | S_IWUSR, show_auto_temp, set_auto_temp, \
1130 offset - 1, 0); \
1131 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point2_temp, \
1132 S_IRUGO | S_IWUSR, show_auto_temp, set_auto_temp, \
1133 offset - 1, 2); \
1134 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point3_temp, \
1135 S_IRUGO | S_IWUSR, show_auto_temp, set_auto_temp, \
1136 offset - 1, 3); \
1137 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point4_temp, \
1138 S_IRUGO | S_IWUSR, show_auto_temp, set_auto_temp, \
1139 offset - 1, 4);
1140
1141 show_pwm_offset(1);
1142 show_pwm_offset(2);
1143 show_pwm_offset(3);
1144
1145 /* A different set of callbacks for 16-bit fans */
1146 static ssize_t show_fan16(struct device *dev, struct device_attribute *attr,
1147 char *buf)
1148 {
1149 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
1150 int nr = sensor_attr->index;
1151 struct it87_data *data = it87_update_device(dev);
1152 return sprintf(buf, "%d\n", FAN16_FROM_REG(data->fan[nr]));
1153 }
1154
1155 static ssize_t show_fan16_min(struct device *dev, struct device_attribute *attr,
1156 char *buf)
1157 {
1158 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
1159 int nr = sensor_attr->index;
1160 struct it87_data *data = it87_update_device(dev);
1161 return sprintf(buf, "%d\n", FAN16_FROM_REG(data->fan_min[nr]));
1162 }
1163
1164 static ssize_t set_fan16_min(struct device *dev, struct device_attribute *attr,
1165 const char *buf, size_t count)
1166 {
1167 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
1168 int nr = sensor_attr->index;
1169 struct it87_data *data = dev_get_drvdata(dev);
1170 long val;
1171
1172 if (kstrtol(buf, 10, &val) < 0)
1173 return -EINVAL;
1174
1175 mutex_lock(&data->update_lock);
1176 data->fan_min[nr] = FAN16_TO_REG(val);
1177 it87_write_value(data, IT87_REG_FAN_MIN[nr],
1178 data->fan_min[nr] & 0xff);
1179 it87_write_value(data, IT87_REG_FANX_MIN[nr],
1180 data->fan_min[nr] >> 8);
1181 mutex_unlock(&data->update_lock);
1182 return count;
1183 }
1184
1185 /*
1186 * We want to use the same sysfs file names as 8-bit fans, but we need
1187 * different variable names, so we have to use SENSOR_ATTR instead of
1188 * SENSOR_DEVICE_ATTR.
1189 */
1190 #define show_fan16_offset(offset) \
1191 static struct sensor_device_attribute sensor_dev_attr_fan##offset##_input16 \
1192 = SENSOR_ATTR(fan##offset##_input, S_IRUGO, \
1193 show_fan16, NULL, offset - 1); \
1194 static struct sensor_device_attribute sensor_dev_attr_fan##offset##_min16 \
1195 = SENSOR_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \
1196 show_fan16_min, set_fan16_min, offset - 1)
1197
1198 show_fan16_offset(1);
1199 show_fan16_offset(2);
1200 show_fan16_offset(3);
1201 show_fan16_offset(4);
1202 show_fan16_offset(5);
1203
1204 /* Alarms */
1205 static ssize_t show_alarms(struct device *dev, struct device_attribute *attr,
1206 char *buf)
1207 {
1208 struct it87_data *data = it87_update_device(dev);
1209 return sprintf(buf, "%u\n", data->alarms);
1210 }
1211 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
1212
1213 static ssize_t show_alarm(struct device *dev, struct device_attribute *attr,
1214 char *buf)
1215 {
1216 int bitnr = to_sensor_dev_attr(attr)->index;
1217 struct it87_data *data = it87_update_device(dev);
1218 return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1);
1219 }
1220
1221 static ssize_t clear_intrusion(struct device *dev, struct device_attribute
1222 *attr, const char *buf, size_t count)
1223 {
1224 struct it87_data *data = dev_get_drvdata(dev);
1225 long val;
1226 int config;
1227
1228 if (kstrtol(buf, 10, &val) < 0 || val != 0)
1229 return -EINVAL;
1230
1231 mutex_lock(&data->update_lock);
1232 config = it87_read_value(data, IT87_REG_CONFIG);
1233 if (config < 0) {
1234 count = config;
1235 } else {
1236 config |= 1 << 5;
1237 it87_write_value(data, IT87_REG_CONFIG, config);
1238 /* Invalidate cache to force re-read */
1239 data->valid = 0;
1240 }
1241 mutex_unlock(&data->update_lock);
1242
1243 return count;
1244 }
1245
1246 static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 8);
1247 static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 9);
1248 static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 10);
1249 static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 11);
1250 static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 12);
1251 static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 13);
1252 static SENSOR_DEVICE_ATTR(in6_alarm, S_IRUGO, show_alarm, NULL, 14);
1253 static SENSOR_DEVICE_ATTR(in7_alarm, S_IRUGO, show_alarm, NULL, 15);
1254 static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 0);
1255 static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 1);
1256 static SENSOR_DEVICE_ATTR(fan3_alarm, S_IRUGO, show_alarm, NULL, 2);
1257 static SENSOR_DEVICE_ATTR(fan4_alarm, S_IRUGO, show_alarm, NULL, 3);
1258 static SENSOR_DEVICE_ATTR(fan5_alarm, S_IRUGO, show_alarm, NULL, 6);
1259 static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 16);
1260 static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 17);
1261 static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL, 18);
1262 static SENSOR_DEVICE_ATTR(intrusion0_alarm, S_IRUGO | S_IWUSR,
1263 show_alarm, clear_intrusion, 4);
1264
1265 static ssize_t show_beep(struct device *dev, struct device_attribute *attr,
1266 char *buf)
1267 {
1268 int bitnr = to_sensor_dev_attr(attr)->index;
1269 struct it87_data *data = it87_update_device(dev);
1270 return sprintf(buf, "%u\n", (data->beeps >> bitnr) & 1);
1271 }
1272 static ssize_t set_beep(struct device *dev, struct device_attribute *attr,
1273 const char *buf, size_t count)
1274 {
1275 int bitnr = to_sensor_dev_attr(attr)->index;
1276 struct it87_data *data = dev_get_drvdata(dev);
1277 long val;
1278
1279 if (kstrtol(buf, 10, &val) < 0
1280 || (val != 0 && val != 1))
1281 return -EINVAL;
1282
1283 mutex_lock(&data->update_lock);
1284 data->beeps = it87_read_value(data, IT87_REG_BEEP_ENABLE);
1285 if (val)
1286 data->beeps |= (1 << bitnr);
1287 else
1288 data->beeps &= ~(1 << bitnr);
1289 it87_write_value(data, IT87_REG_BEEP_ENABLE, data->beeps);
1290 mutex_unlock(&data->update_lock);
1291 return count;
1292 }
1293
1294 static SENSOR_DEVICE_ATTR(in0_beep, S_IRUGO | S_IWUSR,
1295 show_beep, set_beep, 1);
1296 static SENSOR_DEVICE_ATTR(in1_beep, S_IRUGO, show_beep, NULL, 1);
1297 static SENSOR_DEVICE_ATTR(in2_beep, S_IRUGO, show_beep, NULL, 1);
1298 static SENSOR_DEVICE_ATTR(in3_beep, S_IRUGO, show_beep, NULL, 1);
1299 static SENSOR_DEVICE_ATTR(in4_beep, S_IRUGO, show_beep, NULL, 1);
1300 static SENSOR_DEVICE_ATTR(in5_beep, S_IRUGO, show_beep, NULL, 1);
1301 static SENSOR_DEVICE_ATTR(in6_beep, S_IRUGO, show_beep, NULL, 1);
1302 static SENSOR_DEVICE_ATTR(in7_beep, S_IRUGO, show_beep, NULL, 1);
1303 /* fanX_beep writability is set later */
1304 static SENSOR_DEVICE_ATTR(fan1_beep, S_IRUGO, show_beep, set_beep, 0);
1305 static SENSOR_DEVICE_ATTR(fan2_beep, S_IRUGO, show_beep, set_beep, 0);
1306 static SENSOR_DEVICE_ATTR(fan3_beep, S_IRUGO, show_beep, set_beep, 0);
1307 static SENSOR_DEVICE_ATTR(fan4_beep, S_IRUGO, show_beep, set_beep, 0);
1308 static SENSOR_DEVICE_ATTR(fan5_beep, S_IRUGO, show_beep, set_beep, 0);
1309 static SENSOR_DEVICE_ATTR(temp1_beep, S_IRUGO | S_IWUSR,
1310 show_beep, set_beep, 2);
1311 static SENSOR_DEVICE_ATTR(temp2_beep, S_IRUGO, show_beep, NULL, 2);
1312 static SENSOR_DEVICE_ATTR(temp3_beep, S_IRUGO, show_beep, NULL, 2);
1313
1314 static ssize_t show_vrm_reg(struct device *dev, struct device_attribute *attr,
1315 char *buf)
1316 {
1317 struct it87_data *data = dev_get_drvdata(dev);
1318 return sprintf(buf, "%u\n", data->vrm);
1319 }
1320 static ssize_t store_vrm_reg(struct device *dev, struct device_attribute *attr,
1321 const char *buf, size_t count)
1322 {
1323 struct it87_data *data = dev_get_drvdata(dev);
1324 unsigned long val;
1325
1326 if (kstrtoul(buf, 10, &val) < 0)
1327 return -EINVAL;
1328
1329 data->vrm = val;
1330
1331 return count;
1332 }
1333 static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm_reg, store_vrm_reg);
1334
1335 static ssize_t show_vid_reg(struct device *dev, struct device_attribute *attr,
1336 char *buf)
1337 {
1338 struct it87_data *data = it87_update_device(dev);
1339 return sprintf(buf, "%ld\n", (long) vid_from_reg(data->vid, data->vrm));
1340 }
1341 static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid_reg, NULL);
1342
1343 static ssize_t show_label(struct device *dev, struct device_attribute *attr,
1344 char *buf)
1345 {
1346 static const char * const labels[] = {
1347 "+5V",
1348 "5VSB",
1349 "Vbat",
1350 };
1351 static const char * const labels_it8721[] = {
1352 "+3.3V",
1353 "3VSB",
1354 "Vbat",
1355 };
1356 struct it87_data *data = dev_get_drvdata(dev);
1357 int nr = to_sensor_dev_attr(attr)->index;
1358
1359 return sprintf(buf, "%s\n", has_12mv_adc(data) ? labels_it8721[nr]
1360 : labels[nr]);
1361 }
1362 static SENSOR_DEVICE_ATTR(in3_label, S_IRUGO, show_label, NULL, 0);
1363 static SENSOR_DEVICE_ATTR(in7_label, S_IRUGO, show_label, NULL, 1);
1364 static SENSOR_DEVICE_ATTR(in8_label, S_IRUGO, show_label, NULL, 2);
1365
1366 static ssize_t show_name(struct device *dev, struct device_attribute
1367 *devattr, char *buf)
1368 {
1369 struct it87_data *data = dev_get_drvdata(dev);
1370 return sprintf(buf, "%s\n", data->name);
1371 }
1372 static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
1373
1374 static struct attribute *it87_attributes[] = {
1375 &sensor_dev_attr_in0_input.dev_attr.attr,
1376 &sensor_dev_attr_in1_input.dev_attr.attr,
1377 &sensor_dev_attr_in2_input.dev_attr.attr,
1378 &sensor_dev_attr_in3_input.dev_attr.attr,
1379 &sensor_dev_attr_in4_input.dev_attr.attr,
1380 &sensor_dev_attr_in5_input.dev_attr.attr,
1381 &sensor_dev_attr_in6_input.dev_attr.attr,
1382 &sensor_dev_attr_in7_input.dev_attr.attr,
1383 &sensor_dev_attr_in8_input.dev_attr.attr,
1384 &sensor_dev_attr_in0_min.dev_attr.attr,
1385 &sensor_dev_attr_in1_min.dev_attr.attr,
1386 &sensor_dev_attr_in2_min.dev_attr.attr,
1387 &sensor_dev_attr_in3_min.dev_attr.attr,
1388 &sensor_dev_attr_in4_min.dev_attr.attr,
1389 &sensor_dev_attr_in5_min.dev_attr.attr,
1390 &sensor_dev_attr_in6_min.dev_attr.attr,
1391 &sensor_dev_attr_in7_min.dev_attr.attr,
1392 &sensor_dev_attr_in0_max.dev_attr.attr,
1393 &sensor_dev_attr_in1_max.dev_attr.attr,
1394 &sensor_dev_attr_in2_max.dev_attr.attr,
1395 &sensor_dev_attr_in3_max.dev_attr.attr,
1396 &sensor_dev_attr_in4_max.dev_attr.attr,
1397 &sensor_dev_attr_in5_max.dev_attr.attr,
1398 &sensor_dev_attr_in6_max.dev_attr.attr,
1399 &sensor_dev_attr_in7_max.dev_attr.attr,
1400 &sensor_dev_attr_in0_alarm.dev_attr.attr,
1401 &sensor_dev_attr_in1_alarm.dev_attr.attr,
1402 &sensor_dev_attr_in2_alarm.dev_attr.attr,
1403 &sensor_dev_attr_in3_alarm.dev_attr.attr,
1404 &sensor_dev_attr_in4_alarm.dev_attr.attr,
1405 &sensor_dev_attr_in5_alarm.dev_attr.attr,
1406 &sensor_dev_attr_in6_alarm.dev_attr.attr,
1407 &sensor_dev_attr_in7_alarm.dev_attr.attr,
1408
1409 &sensor_dev_attr_temp1_input.dev_attr.attr,
1410 &sensor_dev_attr_temp2_input.dev_attr.attr,
1411 &sensor_dev_attr_temp3_input.dev_attr.attr,
1412 &sensor_dev_attr_temp1_max.dev_attr.attr,
1413 &sensor_dev_attr_temp2_max.dev_attr.attr,
1414 &sensor_dev_attr_temp3_max.dev_attr.attr,
1415 &sensor_dev_attr_temp1_min.dev_attr.attr,
1416 &sensor_dev_attr_temp2_min.dev_attr.attr,
1417 &sensor_dev_attr_temp3_min.dev_attr.attr,
1418 &sensor_dev_attr_temp1_type.dev_attr.attr,
1419 &sensor_dev_attr_temp2_type.dev_attr.attr,
1420 &sensor_dev_attr_temp3_type.dev_attr.attr,
1421 &sensor_dev_attr_temp1_alarm.dev_attr.attr,
1422 &sensor_dev_attr_temp2_alarm.dev_attr.attr,
1423 &sensor_dev_attr_temp3_alarm.dev_attr.attr,
1424
1425 &dev_attr_alarms.attr,
1426 &sensor_dev_attr_intrusion0_alarm.dev_attr.attr,
1427 &dev_attr_name.attr,
1428 NULL
1429 };
1430
1431 static const struct attribute_group it87_group = {
1432 .attrs = it87_attributes,
1433 };
1434
1435 static struct attribute *it87_attributes_beep[] = {
1436 &sensor_dev_attr_in0_beep.dev_attr.attr,
1437 &sensor_dev_attr_in1_beep.dev_attr.attr,
1438 &sensor_dev_attr_in2_beep.dev_attr.attr,
1439 &sensor_dev_attr_in3_beep.dev_attr.attr,
1440 &sensor_dev_attr_in4_beep.dev_attr.attr,
1441 &sensor_dev_attr_in5_beep.dev_attr.attr,
1442 &sensor_dev_attr_in6_beep.dev_attr.attr,
1443 &sensor_dev_attr_in7_beep.dev_attr.attr,
1444
1445 &sensor_dev_attr_temp1_beep.dev_attr.attr,
1446 &sensor_dev_attr_temp2_beep.dev_attr.attr,
1447 &sensor_dev_attr_temp3_beep.dev_attr.attr,
1448 NULL
1449 };
1450
1451 static const struct attribute_group it87_group_beep = {
1452 .attrs = it87_attributes_beep,
1453 };
1454
1455 static struct attribute *it87_attributes_fan16[5][3+1] = { {
1456 &sensor_dev_attr_fan1_input16.dev_attr.attr,
1457 &sensor_dev_attr_fan1_min16.dev_attr.attr,
1458 &sensor_dev_attr_fan1_alarm.dev_attr.attr,
1459 NULL
1460 }, {
1461 &sensor_dev_attr_fan2_input16.dev_attr.attr,
1462 &sensor_dev_attr_fan2_min16.dev_attr.attr,
1463 &sensor_dev_attr_fan2_alarm.dev_attr.attr,
1464 NULL
1465 }, {
1466 &sensor_dev_attr_fan3_input16.dev_attr.attr,
1467 &sensor_dev_attr_fan3_min16.dev_attr.attr,
1468 &sensor_dev_attr_fan3_alarm.dev_attr.attr,
1469 NULL
1470 }, {
1471 &sensor_dev_attr_fan4_input16.dev_attr.attr,
1472 &sensor_dev_attr_fan4_min16.dev_attr.attr,
1473 &sensor_dev_attr_fan4_alarm.dev_attr.attr,
1474 NULL
1475 }, {
1476 &sensor_dev_attr_fan5_input16.dev_attr.attr,
1477 &sensor_dev_attr_fan5_min16.dev_attr.attr,
1478 &sensor_dev_attr_fan5_alarm.dev_attr.attr,
1479 NULL
1480 } };
1481
1482 static const struct attribute_group it87_group_fan16[5] = {
1483 { .attrs = it87_attributes_fan16[0] },
1484 { .attrs = it87_attributes_fan16[1] },
1485 { .attrs = it87_attributes_fan16[2] },
1486 { .attrs = it87_attributes_fan16[3] },
1487 { .attrs = it87_attributes_fan16[4] },
1488 };
1489
1490 static struct attribute *it87_attributes_fan[3][4+1] = { {
1491 &sensor_dev_attr_fan1_input.dev_attr.attr,
1492 &sensor_dev_attr_fan1_min.dev_attr.attr,
1493 &sensor_dev_attr_fan1_div.dev_attr.attr,
1494 &sensor_dev_attr_fan1_alarm.dev_attr.attr,
1495 NULL
1496 }, {
1497 &sensor_dev_attr_fan2_input.dev_attr.attr,
1498 &sensor_dev_attr_fan2_min.dev_attr.attr,
1499 &sensor_dev_attr_fan2_div.dev_attr.attr,
1500 &sensor_dev_attr_fan2_alarm.dev_attr.attr,
1501 NULL
1502 }, {
1503 &sensor_dev_attr_fan3_input.dev_attr.attr,
1504 &sensor_dev_attr_fan3_min.dev_attr.attr,
1505 &sensor_dev_attr_fan3_div.dev_attr.attr,
1506 &sensor_dev_attr_fan3_alarm.dev_attr.attr,
1507 NULL
1508 } };
1509
1510 static const struct attribute_group it87_group_fan[3] = {
1511 { .attrs = it87_attributes_fan[0] },
1512 { .attrs = it87_attributes_fan[1] },
1513 { .attrs = it87_attributes_fan[2] },
1514 };
1515
1516 static const struct attribute_group *
1517 it87_get_fan_group(const struct it87_data *data)
1518 {
1519 return has_16bit_fans(data) ? it87_group_fan16 : it87_group_fan;
1520 }
1521
1522 static struct attribute *it87_attributes_pwm[3][4+1] = { {
1523 &sensor_dev_attr_pwm1_enable.dev_attr.attr,
1524 &sensor_dev_attr_pwm1.dev_attr.attr,
1525 &dev_attr_pwm1_freq.attr,
1526 &sensor_dev_attr_pwm1_auto_channels_temp.dev_attr.attr,
1527 NULL
1528 }, {
1529 &sensor_dev_attr_pwm2_enable.dev_attr.attr,
1530 &sensor_dev_attr_pwm2.dev_attr.attr,
1531 &dev_attr_pwm2_freq.attr,
1532 &sensor_dev_attr_pwm2_auto_channels_temp.dev_attr.attr,
1533 NULL
1534 }, {
1535 &sensor_dev_attr_pwm3_enable.dev_attr.attr,
1536 &sensor_dev_attr_pwm3.dev_attr.attr,
1537 &dev_attr_pwm3_freq.attr,
1538 &sensor_dev_attr_pwm3_auto_channels_temp.dev_attr.attr,
1539 NULL
1540 } };
1541
1542 static const struct attribute_group it87_group_pwm[3] = {
1543 { .attrs = it87_attributes_pwm[0] },
1544 { .attrs = it87_attributes_pwm[1] },
1545 { .attrs = it87_attributes_pwm[2] },
1546 };
1547
1548 static struct attribute *it87_attributes_autopwm[3][9+1] = { {
1549 &sensor_dev_attr_pwm1_auto_point1_pwm.dev_attr.attr,
1550 &sensor_dev_attr_pwm1_auto_point2_pwm.dev_attr.attr,
1551 &sensor_dev_attr_pwm1_auto_point3_pwm.dev_attr.attr,
1552 &sensor_dev_attr_pwm1_auto_point4_pwm.dev_attr.attr,
1553 &sensor_dev_attr_pwm1_auto_point1_temp.dev_attr.attr,
1554 &sensor_dev_attr_pwm1_auto_point1_temp_hyst.dev_attr.attr,
1555 &sensor_dev_attr_pwm1_auto_point2_temp.dev_attr.attr,
1556 &sensor_dev_attr_pwm1_auto_point3_temp.dev_attr.attr,
1557 &sensor_dev_attr_pwm1_auto_point4_temp.dev_attr.attr,
1558 NULL
1559 }, {
1560 &sensor_dev_attr_pwm2_auto_point1_pwm.dev_attr.attr,
1561 &sensor_dev_attr_pwm2_auto_point2_pwm.dev_attr.attr,
1562 &sensor_dev_attr_pwm2_auto_point3_pwm.dev_attr.attr,
1563 &sensor_dev_attr_pwm2_auto_point4_pwm.dev_attr.attr,
1564 &sensor_dev_attr_pwm2_auto_point1_temp.dev_attr.attr,
1565 &sensor_dev_attr_pwm2_auto_point1_temp_hyst.dev_attr.attr,
1566 &sensor_dev_attr_pwm2_auto_point2_temp.dev_attr.attr,
1567 &sensor_dev_attr_pwm2_auto_point3_temp.dev_attr.attr,
1568 &sensor_dev_attr_pwm2_auto_point4_temp.dev_attr.attr,
1569 NULL
1570 }, {
1571 &sensor_dev_attr_pwm3_auto_point1_pwm.dev_attr.attr,
1572 &sensor_dev_attr_pwm3_auto_point2_pwm.dev_attr.attr,
1573 &sensor_dev_attr_pwm3_auto_point3_pwm.dev_attr.attr,
1574 &sensor_dev_attr_pwm3_auto_point4_pwm.dev_attr.attr,
1575 &sensor_dev_attr_pwm3_auto_point1_temp.dev_attr.attr,
1576 &sensor_dev_attr_pwm3_auto_point1_temp_hyst.dev_attr.attr,
1577 &sensor_dev_attr_pwm3_auto_point2_temp.dev_attr.attr,
1578 &sensor_dev_attr_pwm3_auto_point3_temp.dev_attr.attr,
1579 &sensor_dev_attr_pwm3_auto_point4_temp.dev_attr.attr,
1580 NULL
1581 } };
1582
1583 static const struct attribute_group it87_group_autopwm[3] = {
1584 { .attrs = it87_attributes_autopwm[0] },
1585 { .attrs = it87_attributes_autopwm[1] },
1586 { .attrs = it87_attributes_autopwm[2] },
1587 };
1588
1589 static struct attribute *it87_attributes_fan_beep[] = {
1590 &sensor_dev_attr_fan1_beep.dev_attr.attr,
1591 &sensor_dev_attr_fan2_beep.dev_attr.attr,
1592 &sensor_dev_attr_fan3_beep.dev_attr.attr,
1593 &sensor_dev_attr_fan4_beep.dev_attr.attr,
1594 &sensor_dev_attr_fan5_beep.dev_attr.attr,
1595 };
1596
1597 static struct attribute *it87_attributes_vid[] = {
1598 &dev_attr_vrm.attr,
1599 &dev_attr_cpu0_vid.attr,
1600 NULL
1601 };
1602
1603 static const struct attribute_group it87_group_vid = {
1604 .attrs = it87_attributes_vid,
1605 };
1606
1607 static struct attribute *it87_attributes_label[] = {
1608 &sensor_dev_attr_in3_label.dev_attr.attr,
1609 &sensor_dev_attr_in7_label.dev_attr.attr,
1610 &sensor_dev_attr_in8_label.dev_attr.attr,
1611 NULL
1612 };
1613
1614 static const struct attribute_group it87_group_label = {
1615 .attrs = it87_attributes_label,
1616 };
1617
1618 /* SuperIO detection - will change isa_address if a chip is found */
1619 static int __init it87_find(unsigned short *address,
1620 struct it87_sio_data *sio_data)
1621 {
1622 int err;
1623 u16 chip_type;
1624 const char *board_vendor, *board_name;
1625
1626 err = superio_enter();
1627 if (err)
1628 return err;
1629
1630 err = -ENODEV;
1631 chip_type = force_id ? force_id : superio_inw(DEVID);
1632
1633 switch (chip_type) {
1634 case IT8705F_DEVID:
1635 sio_data->type = it87;
1636 break;
1637 case IT8712F_DEVID:
1638 sio_data->type = it8712;
1639 break;
1640 case IT8716F_DEVID:
1641 case IT8726F_DEVID:
1642 sio_data->type = it8716;
1643 break;
1644 case IT8718F_DEVID:
1645 sio_data->type = it8718;
1646 break;
1647 case IT8720F_DEVID:
1648 sio_data->type = it8720;
1649 break;
1650 case IT8721F_DEVID:
1651 sio_data->type = it8721;
1652 break;
1653 case IT8728F_DEVID:
1654 sio_data->type = it8728;
1655 break;
1656 case IT8782F_DEVID:
1657 sio_data->type = it8782;
1658 break;
1659 case IT8783E_DEVID:
1660 sio_data->type = it8783;
1661 break;
1662 case 0xffff: /* No device at all */
1663 goto exit;
1664 default:
1665 pr_debug("Unsupported chip (DEVID=0x%x)\n", chip_type);
1666 goto exit;
1667 }
1668
1669 superio_select(PME);
1670 if (!(superio_inb(IT87_ACT_REG) & 0x01)) {
1671 pr_info("Device not activated, skipping\n");
1672 goto exit;
1673 }
1674
1675 *address = superio_inw(IT87_BASE_REG) & ~(IT87_EXTENT - 1);
1676 if (*address == 0) {
1677 pr_info("Base address not set, skipping\n");
1678 goto exit;
1679 }
1680
1681 err = 0;
1682 sio_data->revision = superio_inb(DEVREV) & 0x0f;
1683 pr_info("Found IT%04xF chip at 0x%x, revision %d\n",
1684 chip_type, *address, sio_data->revision);
1685
1686 /* in8 (Vbat) is always internal */
1687 sio_data->internal = (1 << 2);
1688
1689 /* Read GPIO config and VID value from LDN 7 (GPIO) */
1690 if (sio_data->type == it87) {
1691 /* The IT8705F doesn't have VID pins at all */
1692 sio_data->skip_vid = 1;
1693
1694 /* The IT8705F has a different LD number for GPIO */
1695 superio_select(5);
1696 sio_data->beep_pin = superio_inb(IT87_SIO_BEEP_PIN_REG) & 0x3f;
1697 } else if (sio_data->type == it8783) {
1698 int reg25, reg27, reg2A, reg2C, regEF;
1699 bool uart6;
1700
1701 sio_data->skip_vid = 1; /* No VID */
1702
1703 superio_select(GPIO);
1704
1705 reg25 = superio_inb(IT87_SIO_GPIO1_REG);
1706 reg27 = superio_inb(IT87_SIO_GPIO3_REG);
1707 reg2A = superio_inb(IT87_SIO_PINX1_REG);
1708 reg2C = superio_inb(IT87_SIO_PINX2_REG);
1709 regEF = superio_inb(IT87_SIO_SPI_REG);
1710
1711 uart6 = reg2C & (1 << 2);
1712
1713 /* Check if fan3 is there or not */
1714 if ((reg27 & (1 << 0)) || !uart6)
1715 sio_data->skip_fan |= (1 << 2);
1716 if ((reg25 & (1 << 4))
1717 || (!(reg2A & (1 << 1)) && (regEF & (1 << 0))))
1718 sio_data->skip_pwm |= (1 << 2);
1719
1720 /* Check if fan2 is there or not */
1721 if (reg27 & (1 << 7))
1722 sio_data->skip_fan |= (1 << 1);
1723 if (reg27 & (1 << 3))
1724 sio_data->skip_pwm |= (1 << 1);
1725
1726 /* VIN5 */
1727 if ((reg27 & (1 << 0)) || uart6)
1728 ; /* No VIN5 */
1729
1730 /* VIN6 */
1731 if ((reg27 & (1 << 1)) || uart6)
1732 ; /* No VIN6 */
1733
1734 /*
1735 * VIN7
1736 * Does not depend on bit 2 of Reg2C, contrary to datasheet.
1737 */
1738 if (reg27 & (1 << 2))
1739 ; /* No VIN7 (unless internal) */
1740
1741 if (reg2C & (1 << 0))
1742 sio_data->internal |= (1 << 0);
1743 if (reg2C & (1 << 1))
1744 sio_data->internal |= (1 << 1);
1745
1746 sio_data->beep_pin = superio_inb(IT87_SIO_BEEP_PIN_REG) & 0x3f;
1747
1748 } else {
1749 int reg;
1750
1751 superio_select(GPIO);
1752
1753 reg = superio_inb(IT87_SIO_GPIO3_REG);
1754 if (sio_data->type == it8721 || sio_data->type == it8728 ||
1755 sio_data->type == it8782) {
1756 /*
1757 * IT8721F/IT8758E, and IT8782F don't have VID pins
1758 * at all, not sure about the IT8728F.
1759 */
1760 sio_data->skip_vid = 1;
1761 } else {
1762 /* We need at least 4 VID pins */
1763 if (reg & 0x0f) {
1764 pr_info("VID is disabled (pins used for GPIO)\n");
1765 sio_data->skip_vid = 1;
1766 }
1767 }
1768
1769 /* Check if fan3 is there or not */
1770 if (reg & (1 << 6))
1771 sio_data->skip_pwm |= (1 << 2);
1772 if (reg & (1 << 7))
1773 sio_data->skip_fan |= (1 << 2);
1774
1775 /* Check if fan2 is there or not */
1776 reg = superio_inb(IT87_SIO_GPIO5_REG);
1777 if (reg & (1 << 1))
1778 sio_data->skip_pwm |= (1 << 1);
1779 if (reg & (1 << 2))
1780 sio_data->skip_fan |= (1 << 1);
1781
1782 if ((sio_data->type == it8718 || sio_data->type == it8720)
1783 && !(sio_data->skip_vid))
1784 sio_data->vid_value = superio_inb(IT87_SIO_VID_REG);
1785
1786 reg = superio_inb(IT87_SIO_PINX2_REG);
1787 /*
1788 * The IT8720F has no VIN7 pin, so VCCH should always be
1789 * routed internally to VIN7 with an internal divider.
1790 * Curiously, there still is a configuration bit to control
1791 * this, which means it can be set incorrectly. And even
1792 * more curiously, many boards out there are improperly
1793 * configured, even though the IT8720F datasheet claims
1794 * that the internal routing of VCCH to VIN7 is the default
1795 * setting. So we force the internal routing in this case.
1796 *
1797 * On IT8782F, VIN7 is multiplexed with one of the UART6 pins.
1798 * If UART6 is enabled, re-route VIN7 to the internal divider.
1799 */
1800 if ((sio_data->type == it8720 ||
1801 (sio_data->type == it8782 && (reg & (1 << 2))))
1802 && !(reg & (1 << 1))) {
1803 reg |= (1 << 1);
1804 superio_outb(IT87_SIO_PINX2_REG, reg);
1805 pr_notice("Routing internal VCCH to in7\n");
1806 }
1807 if (reg & (1 << 0))
1808 sio_data->internal |= (1 << 0);
1809 if ((reg & (1 << 1)) || sio_data->type == it8721 ||
1810 sio_data->type == it8728)
1811 sio_data->internal |= (1 << 1);
1812
1813 sio_data->beep_pin = superio_inb(IT87_SIO_BEEP_PIN_REG) & 0x3f;
1814 }
1815 if (sio_data->beep_pin)
1816 pr_info("Beeping is supported\n");
1817
1818 /* Disable specific features based on DMI strings */
1819 board_vendor = dmi_get_system_info(DMI_BOARD_VENDOR);
1820 board_name = dmi_get_system_info(DMI_BOARD_NAME);
1821 if (board_vendor && board_name) {
1822 if (strcmp(board_vendor, "nVIDIA") == 0
1823 && strcmp(board_name, "FN68PT") == 0) {
1824 /*
1825 * On the Shuttle SN68PT, FAN_CTL2 is apparently not
1826 * connected to a fan, but to something else. One user
1827 * has reported instant system power-off when changing
1828 * the PWM2 duty cycle, so we disable it.
1829 * I use the board name string as the trigger in case
1830 * the same board is ever used in other systems.
1831 */
1832 pr_info("Disabling pwm2 due to hardware constraints\n");
1833 sio_data->skip_pwm = (1 << 1);
1834 }
1835 }
1836
1837 exit:
1838 superio_exit();
1839 return err;
1840 }
1841
1842 static void it87_remove_files(struct device *dev)
1843 {
1844 struct it87_data *data = platform_get_drvdata(pdev);
1845 struct it87_sio_data *sio_data = dev->platform_data;
1846 const struct attribute_group *fan_group = it87_get_fan_group(data);
1847 int i;
1848
1849 sysfs_remove_group(&dev->kobj, &it87_group);
1850 if (sio_data->beep_pin)
1851 sysfs_remove_group(&dev->kobj, &it87_group_beep);
1852 for (i = 0; i < 5; i++) {
1853 if (!(data->has_fan & (1 << i)))
1854 continue;
1855 sysfs_remove_group(&dev->kobj, &fan_group[i]);
1856 if (sio_data->beep_pin)
1857 sysfs_remove_file(&dev->kobj,
1858 it87_attributes_fan_beep[i]);
1859 }
1860 for (i = 0; i < 3; i++) {
1861 if (sio_data->skip_pwm & (1 << 0))
1862 continue;
1863 sysfs_remove_group(&dev->kobj, &it87_group_pwm[i]);
1864 if (has_old_autopwm(data))
1865 sysfs_remove_group(&dev->kobj,
1866 &it87_group_autopwm[i]);
1867 }
1868 if (!sio_data->skip_vid)
1869 sysfs_remove_group(&dev->kobj, &it87_group_vid);
1870 sysfs_remove_group(&dev->kobj, &it87_group_label);
1871 }
1872
1873 static int __devinit it87_probe(struct platform_device *pdev)
1874 {
1875 struct it87_data *data;
1876 struct resource *res;
1877 struct device *dev = &pdev->dev;
1878 struct it87_sio_data *sio_data = dev->platform_data;
1879 const struct attribute_group *fan_group;
1880 int err = 0, i;
1881 int enable_pwm_interface;
1882 int fan_beep_need_rw;
1883 static const char * const names[] = {
1884 "it87",
1885 "it8712",
1886 "it8716",
1887 "it8718",
1888 "it8720",
1889 "it8721",
1890 "it8728",
1891 "it8782",
1892 "it8783",
1893 };
1894
1895 res = platform_get_resource(pdev, IORESOURCE_IO, 0);
1896 if (!request_region(res->start, IT87_EC_EXTENT, DRVNAME)) {
1897 dev_err(dev, "Failed to request region 0x%lx-0x%lx\n",
1898 (unsigned long)res->start,
1899 (unsigned long)(res->start + IT87_EC_EXTENT - 1));
1900 err = -EBUSY;
1901 goto ERROR0;
1902 }
1903
1904 data = kzalloc(sizeof(struct it87_data), GFP_KERNEL);
1905 if (!data) {
1906 err = -ENOMEM;
1907 goto ERROR1;
1908 }
1909
1910 data->addr = res->start;
1911 data->type = sio_data->type;
1912 data->revision = sio_data->revision;
1913 data->name = names[sio_data->type];
1914
1915 /* Now, we do the remaining detection. */
1916 if ((it87_read_value(data, IT87_REG_CONFIG) & 0x80)
1917 || it87_read_value(data, IT87_REG_CHIPID) != 0x90) {
1918 err = -ENODEV;
1919 goto ERROR2;
1920 }
1921
1922 platform_set_drvdata(pdev, data);
1923
1924 mutex_init(&data->update_lock);
1925
1926 /* Check PWM configuration */
1927 enable_pwm_interface = it87_check_pwm(dev);
1928
1929 /* Starting with IT8721F, we handle scaling of internal voltages */
1930 if (has_12mv_adc(data)) {
1931 if (sio_data->internal & (1 << 0))
1932 data->in_scaled |= (1 << 3); /* in3 is AVCC */
1933 if (sio_data->internal & (1 << 1))
1934 data->in_scaled |= (1 << 7); /* in7 is VSB */
1935 if (sio_data->internal & (1 << 2))
1936 data->in_scaled |= (1 << 8); /* in8 is Vbat */
1937 } else if (sio_data->type == it8782 || sio_data->type == it8783) {
1938 if (sio_data->internal & (1 << 0))
1939 data->in_scaled |= (1 << 3); /* in3 is VCC5V */
1940 if (sio_data->internal & (1 << 1))
1941 data->in_scaled |= (1 << 7); /* in7 is VCCH5V */
1942 }
1943
1944 /* Initialize the IT87 chip */
1945 it87_init_device(pdev);
1946
1947 /* Register sysfs hooks */
1948 err = sysfs_create_group(&dev->kobj, &it87_group);
1949 if (err)
1950 goto ERROR2;
1951
1952 if (sio_data->beep_pin) {
1953 err = sysfs_create_group(&dev->kobj, &it87_group_beep);
1954 if (err)
1955 goto ERROR4;
1956 }
1957
1958 /* Do not create fan files for disabled fans */
1959 fan_group = it87_get_fan_group(data);
1960 fan_beep_need_rw = 1;
1961 for (i = 0; i < 5; i++) {
1962 if (!(data->has_fan & (1 << i)))
1963 continue;
1964 err = sysfs_create_group(&dev->kobj, &fan_group[i]);
1965 if (err)
1966 goto ERROR4;
1967
1968 if (sio_data->beep_pin) {
1969 err = sysfs_create_file(&dev->kobj,
1970 it87_attributes_fan_beep[i]);
1971 if (err)
1972 goto ERROR4;
1973 if (!fan_beep_need_rw)
1974 continue;
1975
1976 /*
1977 * As we have a single beep enable bit for all fans,
1978 * only the first enabled fan has a writable attribute
1979 * for it.
1980 */
1981 if (sysfs_chmod_file(&dev->kobj,
1982 it87_attributes_fan_beep[i],
1983 S_IRUGO | S_IWUSR))
1984 dev_dbg(dev, "chmod +w fan%d_beep failed\n",
1985 i + 1);
1986 fan_beep_need_rw = 0;
1987 }
1988 }
1989
1990 if (enable_pwm_interface) {
1991 for (i = 0; i < 3; i++) {
1992 if (sio_data->skip_pwm & (1 << i))
1993 continue;
1994 err = sysfs_create_group(&dev->kobj,
1995 &it87_group_pwm[i]);
1996 if (err)
1997 goto ERROR4;
1998
1999 if (!has_old_autopwm(data))
2000 continue;
2001 err = sysfs_create_group(&dev->kobj,
2002 &it87_group_autopwm[i]);
2003 if (err)
2004 goto ERROR4;
2005 }
2006 }
2007
2008 if (!sio_data->skip_vid) {
2009 data->vrm = vid_which_vrm();
2010 /* VID reading from Super-I/O config space if available */
2011 data->vid = sio_data->vid_value;
2012 err = sysfs_create_group(&dev->kobj, &it87_group_vid);
2013 if (err)
2014 goto ERROR4;
2015 }
2016
2017 /* Export labels for internal sensors */
2018 for (i = 0; i < 3; i++) {
2019 if (!(sio_data->internal & (1 << i)))
2020 continue;
2021 err = sysfs_create_file(&dev->kobj,
2022 it87_attributes_label[i]);
2023 if (err)
2024 goto ERROR4;
2025 }
2026
2027 data->hwmon_dev = hwmon_device_register(dev);
2028 if (IS_ERR(data->hwmon_dev)) {
2029 err = PTR_ERR(data->hwmon_dev);
2030 goto ERROR4;
2031 }
2032
2033 return 0;
2034
2035 ERROR4:
2036 it87_remove_files(dev);
2037 ERROR2:
2038 platform_set_drvdata(pdev, NULL);
2039 kfree(data);
2040 ERROR1:
2041 release_region(res->start, IT87_EC_EXTENT);
2042 ERROR0:
2043 return err;
2044 }
2045
2046 static int __devexit it87_remove(struct platform_device *pdev)
2047 {
2048 struct it87_data *data = platform_get_drvdata(pdev);
2049
2050 hwmon_device_unregister(data->hwmon_dev);
2051 it87_remove_files(&pdev->dev);
2052
2053 release_region(data->addr, IT87_EC_EXTENT);
2054 platform_set_drvdata(pdev, NULL);
2055 kfree(data);
2056
2057 return 0;
2058 }
2059
2060 /*
2061 * Must be called with data->update_lock held, except during initialization.
2062 * We ignore the IT87 BUSY flag at this moment - it could lead to deadlocks,
2063 * would slow down the IT87 access and should not be necessary.
2064 */
2065 static int it87_read_value(struct it87_data *data, u8 reg)
2066 {
2067 outb_p(reg, data->addr + IT87_ADDR_REG_OFFSET);
2068 return inb_p(data->addr + IT87_DATA_REG_OFFSET);
2069 }
2070
2071 /*
2072 * Must be called with data->update_lock held, except during initialization.
2073 * We ignore the IT87 BUSY flag at this moment - it could lead to deadlocks,
2074 * would slow down the IT87 access and should not be necessary.
2075 */
2076 static void it87_write_value(struct it87_data *data, u8 reg, u8 value)
2077 {
2078 outb_p(reg, data->addr + IT87_ADDR_REG_OFFSET);
2079 outb_p(value, data->addr + IT87_DATA_REG_OFFSET);
2080 }
2081
2082 /* Return 1 if and only if the PWM interface is safe to use */
2083 static int __devinit it87_check_pwm(struct device *dev)
2084 {
2085 struct it87_data *data = dev_get_drvdata(dev);
2086 /*
2087 * Some BIOSes fail to correctly configure the IT87 fans. All fans off
2088 * and polarity set to active low is sign that this is the case so we
2089 * disable pwm control to protect the user.
2090 */
2091 int tmp = it87_read_value(data, IT87_REG_FAN_CTL);
2092 if ((tmp & 0x87) == 0) {
2093 if (fix_pwm_polarity) {
2094 /*
2095 * The user asks us to attempt a chip reconfiguration.
2096 * This means switching to active high polarity and
2097 * inverting all fan speed values.
2098 */
2099 int i;
2100 u8 pwm[3];
2101
2102 for (i = 0; i < 3; i++)
2103 pwm[i] = it87_read_value(data,
2104 IT87_REG_PWM(i));
2105
2106 /*
2107 * If any fan is in automatic pwm mode, the polarity
2108 * might be correct, as suspicious as it seems, so we
2109 * better don't change anything (but still disable the
2110 * PWM interface).
2111 */
2112 if (!((pwm[0] | pwm[1] | pwm[2]) & 0x80)) {
2113 dev_info(dev, "Reconfiguring PWM to "
2114 "active high polarity\n");
2115 it87_write_value(data, IT87_REG_FAN_CTL,
2116 tmp | 0x87);
2117 for (i = 0; i < 3; i++)
2118 it87_write_value(data,
2119 IT87_REG_PWM(i),
2120 0x7f & ~pwm[i]);
2121 return 1;
2122 }
2123
2124 dev_info(dev, "PWM configuration is "
2125 "too broken to be fixed\n");
2126 }
2127
2128 dev_info(dev, "Detected broken BIOS "
2129 "defaults, disabling PWM interface\n");
2130 return 0;
2131 } else if (fix_pwm_polarity) {
2132 dev_info(dev, "PWM configuration looks "
2133 "sane, won't touch\n");
2134 }
2135
2136 return 1;
2137 }
2138
2139 /* Called when we have found a new IT87. */
2140 static void __devinit it87_init_device(struct platform_device *pdev)
2141 {
2142 struct it87_sio_data *sio_data = pdev->dev.platform_data;
2143 struct it87_data *data = platform_get_drvdata(pdev);
2144 int tmp, i;
2145 u8 mask;
2146
2147 /*
2148 * For each PWM channel:
2149 * - If it is in automatic mode, setting to manual mode should set
2150 * the fan to full speed by default.
2151 * - If it is in manual mode, we need a mapping to temperature
2152 * channels to use when later setting to automatic mode later.
2153 * Use a 1:1 mapping by default (we are clueless.)
2154 * In both cases, the value can (and should) be changed by the user
2155 * prior to switching to a different mode.
2156 * Note that this is no longer needed for the IT8721F and later, as
2157 * these have separate registers for the temperature mapping and the
2158 * manual duty cycle.
2159 */
2160 for (i = 0; i < 3; i++) {
2161 data->pwm_temp_map[i] = i;
2162 data->pwm_duty[i] = 0x7f; /* Full speed */
2163 data->auto_pwm[i][3] = 0x7f; /* Full speed, hard-coded */
2164 }
2165
2166 /*
2167 * Some chips seem to have default value 0xff for all limit
2168 * registers. For low voltage limits it makes no sense and triggers
2169 * alarms, so change to 0 instead. For high temperature limits, it
2170 * means -1 degree C, which surprisingly doesn't trigger an alarm,
2171 * but is still confusing, so change to 127 degrees C.
2172 */
2173 for (i = 0; i < 8; i++) {
2174 tmp = it87_read_value(data, IT87_REG_VIN_MIN(i));
2175 if (tmp == 0xff)
2176 it87_write_value(data, IT87_REG_VIN_MIN(i), 0);
2177 }
2178 for (i = 0; i < 3; i++) {
2179 tmp = it87_read_value(data, IT87_REG_TEMP_HIGH(i));
2180 if (tmp == 0xff)
2181 it87_write_value(data, IT87_REG_TEMP_HIGH(i), 127);
2182 }
2183
2184 /*
2185 * Temperature channels are not forcibly enabled, as they can be
2186 * set to two different sensor types and we can't guess which one
2187 * is correct for a given system. These channels can be enabled at
2188 * run-time through the temp{1-3}_type sysfs accessors if needed.
2189 */
2190
2191 /* Check if voltage monitors are reset manually or by some reason */
2192 tmp = it87_read_value(data, IT87_REG_VIN_ENABLE);
2193 if ((tmp & 0xff) == 0) {
2194 /* Enable all voltage monitors */
2195 it87_write_value(data, IT87_REG_VIN_ENABLE, 0xff);
2196 }
2197
2198 /* Check if tachometers are reset manually or by some reason */
2199 mask = 0x70 & ~(sio_data->skip_fan << 4);
2200 data->fan_main_ctrl = it87_read_value(data, IT87_REG_FAN_MAIN_CTRL);
2201 if ((data->fan_main_ctrl & mask) == 0) {
2202 /* Enable all fan tachometers */
2203 data->fan_main_ctrl |= mask;
2204 it87_write_value(data, IT87_REG_FAN_MAIN_CTRL,
2205 data->fan_main_ctrl);
2206 }
2207 data->has_fan = (data->fan_main_ctrl >> 4) & 0x07;
2208
2209 /* Set tachometers to 16-bit mode if needed */
2210 if (has_16bit_fans(data)) {
2211 tmp = it87_read_value(data, IT87_REG_FAN_16BIT);
2212 if (~tmp & 0x07 & data->has_fan) {
2213 dev_dbg(&pdev->dev,
2214 "Setting fan1-3 to 16-bit mode\n");
2215 it87_write_value(data, IT87_REG_FAN_16BIT,
2216 tmp | 0x07);
2217 }
2218 /* IT8705F, IT8782F, and IT8783E/F only support three fans. */
2219 if (data->type != it87 && data->type != it8782 &&
2220 data->type != it8783) {
2221 if (tmp & (1 << 4))
2222 data->has_fan |= (1 << 3); /* fan4 enabled */
2223 if (tmp & (1 << 5))
2224 data->has_fan |= (1 << 4); /* fan5 enabled */
2225 }
2226 }
2227
2228 /* Fan input pins may be used for alternative functions */
2229 data->has_fan &= ~sio_data->skip_fan;
2230
2231 /* Start monitoring */
2232 it87_write_value(data, IT87_REG_CONFIG,
2233 (it87_read_value(data, IT87_REG_CONFIG) & 0x36)
2234 | (update_vbat ? 0x41 : 0x01));
2235 }
2236
2237 static void it87_update_pwm_ctrl(struct it87_data *data, int nr)
2238 {
2239 data->pwm_ctrl[nr] = it87_read_value(data, IT87_REG_PWM(nr));
2240 if (has_newer_autopwm(data)) {
2241 data->pwm_temp_map[nr] = data->pwm_ctrl[nr] & 0x03;
2242 data->pwm_duty[nr] = it87_read_value(data,
2243 IT87_REG_PWM_DUTY(nr));
2244 } else {
2245 if (data->pwm_ctrl[nr] & 0x80) /* Automatic mode */
2246 data->pwm_temp_map[nr] = data->pwm_ctrl[nr] & 0x03;
2247 else /* Manual mode */
2248 data->pwm_duty[nr] = data->pwm_ctrl[nr] & 0x7f;
2249 }
2250
2251 if (has_old_autopwm(data)) {
2252 int i;
2253
2254 for (i = 0; i < 5 ; i++)
2255 data->auto_temp[nr][i] = it87_read_value(data,
2256 IT87_REG_AUTO_TEMP(nr, i));
2257 for (i = 0; i < 3 ; i++)
2258 data->auto_pwm[nr][i] = it87_read_value(data,
2259 IT87_REG_AUTO_PWM(nr, i));
2260 }
2261 }
2262
2263 static struct it87_data *it87_update_device(struct device *dev)
2264 {
2265 struct it87_data *data = dev_get_drvdata(dev);
2266 int i;
2267
2268 mutex_lock(&data->update_lock);
2269
2270 if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
2271 || !data->valid) {
2272 if (update_vbat) {
2273 /*
2274 * Cleared after each update, so reenable. Value
2275 * returned by this read will be previous value
2276 */
2277 it87_write_value(data, IT87_REG_CONFIG,
2278 it87_read_value(data, IT87_REG_CONFIG) | 0x40);
2279 }
2280 for (i = 0; i <= 7; i++) {
2281 data->in[i] =
2282 it87_read_value(data, IT87_REG_VIN(i));
2283 data->in_min[i] =
2284 it87_read_value(data, IT87_REG_VIN_MIN(i));
2285 data->in_max[i] =
2286 it87_read_value(data, IT87_REG_VIN_MAX(i));
2287 }
2288 /* in8 (battery) has no limit registers */
2289 data->in[8] = it87_read_value(data, IT87_REG_VIN(8));
2290
2291 for (i = 0; i < 5; i++) {
2292 /* Skip disabled fans */
2293 if (!(data->has_fan & (1 << i)))
2294 continue;
2295
2296 data->fan_min[i] =
2297 it87_read_value(data, IT87_REG_FAN_MIN[i]);
2298 data->fan[i] = it87_read_value(data,
2299 IT87_REG_FAN[i]);
2300 /* Add high byte if in 16-bit mode */
2301 if (has_16bit_fans(data)) {
2302 data->fan[i] |= it87_read_value(data,
2303 IT87_REG_FANX[i]) << 8;
2304 data->fan_min[i] |= it87_read_value(data,
2305 IT87_REG_FANX_MIN[i]) << 8;
2306 }
2307 }
2308 for (i = 0; i < 3; i++) {
2309 data->temp[i] =
2310 it87_read_value(data, IT87_REG_TEMP(i));
2311 data->temp_high[i] =
2312 it87_read_value(data, IT87_REG_TEMP_HIGH(i));
2313 data->temp_low[i] =
2314 it87_read_value(data, IT87_REG_TEMP_LOW(i));
2315 }
2316
2317 /* Newer chips don't have clock dividers */
2318 if ((data->has_fan & 0x07) && !has_16bit_fans(data)) {
2319 i = it87_read_value(data, IT87_REG_FAN_DIV);
2320 data->fan_div[0] = i & 0x07;
2321 data->fan_div[1] = (i >> 3) & 0x07;
2322 data->fan_div[2] = (i & 0x40) ? 3 : 1;
2323 }
2324
2325 data->alarms =
2326 it87_read_value(data, IT87_REG_ALARM1) |
2327 (it87_read_value(data, IT87_REG_ALARM2) << 8) |
2328 (it87_read_value(data, IT87_REG_ALARM3) << 16);
2329 data->beeps = it87_read_value(data, IT87_REG_BEEP_ENABLE);
2330
2331 data->fan_main_ctrl = it87_read_value(data,
2332 IT87_REG_FAN_MAIN_CTRL);
2333 data->fan_ctl = it87_read_value(data, IT87_REG_FAN_CTL);
2334 for (i = 0; i < 3; i++)
2335 it87_update_pwm_ctrl(data, i);
2336
2337 data->sensor = it87_read_value(data, IT87_REG_TEMP_ENABLE);
2338 /*
2339 * The IT8705F does not have VID capability.
2340 * The IT8718F and later don't use IT87_REG_VID for the
2341 * same purpose.
2342 */
2343 if (data->type == it8712 || data->type == it8716) {
2344 data->vid = it87_read_value(data, IT87_REG_VID);
2345 /*
2346 * The older IT8712F revisions had only 5 VID pins,
2347 * but we assume it is always safe to read 6 bits.
2348 */
2349 data->vid &= 0x3f;
2350 }
2351 data->last_updated = jiffies;
2352 data->valid = 1;
2353 }
2354
2355 mutex_unlock(&data->update_lock);
2356
2357 return data;
2358 }
2359
2360 static int __init it87_device_add(unsigned short address,
2361 const struct it87_sio_data *sio_data)
2362 {
2363 struct resource res = {
2364 .start = address + IT87_EC_OFFSET,
2365 .end = address + IT87_EC_OFFSET + IT87_EC_EXTENT - 1,
2366 .name = DRVNAME,
2367 .flags = IORESOURCE_IO,
2368 };
2369 int err;
2370
2371 err = acpi_check_resource_conflict(&res);
2372 if (err)
2373 goto exit;
2374
2375 pdev = platform_device_alloc(DRVNAME, address);
2376 if (!pdev) {
2377 err = -ENOMEM;
2378 pr_err("Device allocation failed\n");
2379 goto exit;
2380 }
2381
2382 err = platform_device_add_resources(pdev, &res, 1);
2383 if (err) {
2384 pr_err("Device resource addition failed (%d)\n", err);
2385 goto exit_device_put;
2386 }
2387
2388 err = platform_device_add_data(pdev, sio_data,
2389 sizeof(struct it87_sio_data));
2390 if (err) {
2391 pr_err("Platform data allocation failed\n");
2392 goto exit_device_put;
2393 }
2394
2395 err = platform_device_add(pdev);
2396 if (err) {
2397 pr_err("Device addition failed (%d)\n", err);
2398 goto exit_device_put;
2399 }
2400
2401 return 0;
2402
2403 exit_device_put:
2404 platform_device_put(pdev);
2405 exit:
2406 return err;
2407 }
2408
2409 static int __init sm_it87_init(void)
2410 {
2411 int err;
2412 unsigned short isa_address = 0;
2413 struct it87_sio_data sio_data;
2414
2415 memset(&sio_data, 0, sizeof(struct it87_sio_data));
2416 err = it87_find(&isa_address, &sio_data);
2417 if (err)
2418 return err;
2419 err = platform_driver_register(&it87_driver);
2420 if (err)
2421 return err;
2422
2423 err = it87_device_add(isa_address, &sio_data);
2424 if (err) {
2425 platform_driver_unregister(&it87_driver);
2426 return err;
2427 }
2428
2429 return 0;
2430 }
2431
2432 static void __exit sm_it87_exit(void)
2433 {
2434 platform_device_unregister(pdev);
2435 platform_driver_unregister(&it87_driver);
2436 }
2437
2438
2439 MODULE_AUTHOR("Chris Gauthron, "
2440 "Jean Delvare <khali@linux-fr.org>");
2441 MODULE_DESCRIPTION("IT8705F/IT871xF/IT872xF hardware monitoring driver");
2442 module_param(update_vbat, bool, 0);
2443 MODULE_PARM_DESC(update_vbat, "Update vbat if set else return powerup value");
2444 module_param(fix_pwm_polarity, bool, 0);
2445 MODULE_PARM_DESC(fix_pwm_polarity,
2446 "Force PWM polarity to active high (DANGEROUS)");
2447 MODULE_LICENSE("GPL");
2448
2449 module_init(sm_it87_init);
2450 module_exit(sm_it87_exit);
Linux 2.6 libata-dev (mirror)