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powerpc/numa: Fix bug in unmap_cpu_from_node
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / hwmon / it87.c
bloba428a92641954a640dd783f051fc9c5565c13d9b
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 #include <linux/module.h>
42 #include <linux/init.h>
43 #include <linux/slab.h>
44 #include <linux/jiffies.h>
45 #include <linux/platform_device.h>
46 #include <linux/hwmon.h>
47 #include <linux/hwmon-sysfs.h>
48 #include <linux/hwmon-vid.h>
49 #include <linux/err.h>
50 #include <linux/mutex.h>
51 #include <linux/sysfs.h>
52 #include <linux/string.h>
53 #include <linux/dmi.h>
54 #include <linux/acpi.h>
55 #include <linux/io.h>
56
57 #define DRVNAME "it87"
58
59 enum chips { it87, it8712, it8716, it8718, it8720, it8721 };
60
61 static unsigned short force_id;
62 module_param(force_id, ushort, 0);
63 MODULE_PARM_DESC(force_id, "Override the detected device ID");
64
65 static struct platform_device *pdev;
66
67 #define REG 0x2e /* The register to read/write */
68 #define DEV 0x07 /* Register: Logical device select */
69 #define VAL 0x2f /* The value to read/write */
70 #define PME 0x04 /* The device with the fan registers in it */
71
72 /* The device with the IT8718F/IT8720F VID value in it */
73 #define GPIO 0x07
74
75 #define DEVID 0x20 /* Register: Device ID */
76 #define DEVREV 0x22 /* Register: Device Revision */
77
78 static inline int
79 superio_inb(int reg)
80 {
81 outb(reg, REG);
82 return inb(VAL);
83 }
84
85 static inline void
86 superio_outb(int reg, int val)
87 {
88 outb(reg, REG);
89 outb(val, VAL);
90 }
91
92 static int superio_inw(int reg)
93 {
94 int val;
95 outb(reg++, REG);
96 val = inb(VAL) << 8;
97 outb(reg, REG);
98 val |= inb(VAL);
99 return val;
100 }
101
102 static inline void
103 superio_select(int ldn)
104 {
105 outb(DEV, REG);
106 outb(ldn, VAL);
107 }
108
109 static inline void
110 superio_enter(void)
111 {
112 outb(0x87, REG);
113 outb(0x01, REG);
114 outb(0x55, REG);
115 outb(0x55, REG);
116 }
117
118 static inline void
119 superio_exit(void)
120 {
121 outb(0x02, REG);
122 outb(0x02, VAL);
123 }
124
125 /* Logical device 4 registers */
126 #define IT8712F_DEVID 0x8712
127 #define IT8705F_DEVID 0x8705
128 #define IT8716F_DEVID 0x8716
129 #define IT8718F_DEVID 0x8718
130 #define IT8720F_DEVID 0x8720
131 #define IT8721F_DEVID 0x8721
132 #define IT8726F_DEVID 0x8726
133 #define IT87_ACT_REG 0x30
134 #define IT87_BASE_REG 0x60
135
136 /* Logical device 7 registers (IT8712F and later) */
137 #define IT87_SIO_GPIO3_REG 0x27
138 #define IT87_SIO_GPIO5_REG 0x29
139 #define IT87_SIO_PINX2_REG 0x2c /* Pin selection */
140 #define IT87_SIO_VID_REG 0xfc /* VID value */
141 #define IT87_SIO_BEEP_PIN_REG 0xf6 /* Beep pin mapping */
142
143 /* Update battery voltage after every reading if true */
144 static int update_vbat;
145
146 /* Not all BIOSes properly configure the PWM registers */
147 static int fix_pwm_polarity;
148
149 /* Many IT87 constants specified below */
150
151 /* Length of ISA address segment */
152 #define IT87_EXTENT 8
153
154 /* Length of ISA address segment for Environmental Controller */
155 #define IT87_EC_EXTENT 2
156
157 /* Offset of EC registers from ISA base address */
158 #define IT87_EC_OFFSET 5
159
160 /* Where are the ISA address/data registers relative to the EC base address */
161 #define IT87_ADDR_REG_OFFSET 0
162 #define IT87_DATA_REG_OFFSET 1
163
164 /*----- The IT87 registers -----*/
165
166 #define IT87_REG_CONFIG 0x00
167
168 #define IT87_REG_ALARM1 0x01
169 #define IT87_REG_ALARM2 0x02
170 #define IT87_REG_ALARM3 0x03
171
172 /* The IT8718F and IT8720F have the VID value in a different register, in
173 Super-I/O configuration space. */
174 #define IT87_REG_VID 0x0a
175 /* The IT8705F and IT8712F earlier than revision 0x08 use register 0x0b
176 for fan divisors. Later IT8712F revisions must use 16-bit tachometer
177 mode. */
178 #define IT87_REG_FAN_DIV 0x0b
179 #define IT87_REG_FAN_16BIT 0x0c
180
181 /* Monitors: 9 voltage (0 to 7, battery), 3 temp (1 to 3), 3 fan (1 to 3) */
182
183 static const u8 IT87_REG_FAN[] = { 0x0d, 0x0e, 0x0f, 0x80, 0x82 };
184 static const u8 IT87_REG_FAN_MIN[] = { 0x10, 0x11, 0x12, 0x84, 0x86 };
185 static const u8 IT87_REG_FANX[] = { 0x18, 0x19, 0x1a, 0x81, 0x83 };
186 static const u8 IT87_REG_FANX_MIN[] = { 0x1b, 0x1c, 0x1d, 0x85, 0x87 };
187 #define IT87_REG_FAN_MAIN_CTRL 0x13
188 #define IT87_REG_FAN_CTL 0x14
189 #define IT87_REG_PWM(nr) (0x15 + (nr))
190 #define IT87_REG_PWM_DUTY(nr) (0x63 + (nr) * 8)
191
192 #define IT87_REG_VIN(nr) (0x20 + (nr))
193 #define IT87_REG_TEMP(nr) (0x29 + (nr))
194
195 #define IT87_REG_VIN_MAX(nr) (0x30 + (nr) * 2)
196 #define IT87_REG_VIN_MIN(nr) (0x31 + (nr) * 2)
197 #define IT87_REG_TEMP_HIGH(nr) (0x40 + (nr) * 2)
198 #define IT87_REG_TEMP_LOW(nr) (0x41 + (nr) * 2)
199
200 #define IT87_REG_VIN_ENABLE 0x50
201 #define IT87_REG_TEMP_ENABLE 0x51
202 #define IT87_REG_BEEP_ENABLE 0x5c
203
204 #define IT87_REG_CHIPID 0x58
205
206 #define IT87_REG_AUTO_TEMP(nr, i) (0x60 + (nr) * 8 + (i))
207 #define IT87_REG_AUTO_PWM(nr, i) (0x65 + (nr) * 8 + (i))
208
209
210 struct it87_sio_data {
211 enum chips type;
212 /* Values read from Super-I/O config space */
213 u8 revision;
214 u8 vid_value;
215 u8 beep_pin;
216 u8 internal; /* Internal sensors can be labeled */
217 /* Features skipped based on config or DMI */
218 u8 skip_vid;
219 u8 skip_fan;
220 u8 skip_pwm;
221 };
222
223 /* For each registered chip, we need to keep some data in memory.
224 The structure is dynamically allocated. */
225 struct it87_data {
226 struct device *hwmon_dev;
227 enum chips type;
228 u8 revision;
229
230 unsigned short addr;
231 const char *name;
232 struct mutex update_lock;
233 char valid; /* !=0 if following fields are valid */
234 unsigned long last_updated; /* In jiffies */
235
236 u16 in_scaled; /* Internal voltage sensors are scaled */
237 u8 in[9]; /* Register value */
238 u8 in_max[8]; /* Register value */
239 u8 in_min[8]; /* Register value */
240 u8 has_fan; /* Bitfield, fans enabled */
241 u16 fan[5]; /* Register values, possibly combined */
242 u16 fan_min[5]; /* Register values, possibly combined */
243 s8 temp[3]; /* Register value */
244 s8 temp_high[3]; /* Register value */
245 s8 temp_low[3]; /* Register value */
246 u8 sensor; /* Register value */
247 u8 fan_div[3]; /* Register encoding, shifted right */
248 u8 vid; /* Register encoding, combined */
249 u8 vrm;
250 u32 alarms; /* Register encoding, combined */
251 u8 beeps; /* Register encoding */
252 u8 fan_main_ctrl; /* Register value */
253 u8 fan_ctl; /* Register value */
254
255 /* The following 3 arrays correspond to the same registers up to
256 * the IT8720F. The meaning of bits 6-0 depends on the value of bit
257 * 7, and we want to preserve settings on mode changes, so we have
258 * to track all values separately.
259 * Starting with the IT8721F, the manual PWM duty cycles are stored
260 * in separate registers (8-bit values), so the separate tracking
261 * is no longer needed, but it is still done to keep the driver
262 * simple. */
263 u8 pwm_ctrl[3]; /* Register value */
264 u8 pwm_duty[3]; /* Manual PWM value set by user */
265 u8 pwm_temp_map[3]; /* PWM to temp. chan. mapping (bits 1-0) */
266
267 /* Automatic fan speed control registers */
268 u8 auto_pwm[3][4]; /* [nr][3] is hard-coded */
269 s8 auto_temp[3][5]; /* [nr][0] is point1_temp_hyst */
270 };
271
272 static u8 in_to_reg(const struct it87_data *data, int nr, long val)
273 {
274 long lsb;
275
276 if (data->type == it8721) {
277 if (data->in_scaled & (1 << nr))
278 lsb = 24;
279 else
280 lsb = 12;
281 } else
282 lsb = 16;
283
284 val = DIV_ROUND_CLOSEST(val, lsb);
285 return SENSORS_LIMIT(val, 0, 255);
286 }
287
288 static int in_from_reg(const struct it87_data *data, int nr, int val)
289 {
290 if (data->type == it8721) {
291 if (data->in_scaled & (1 << nr))
292 return val * 24;
293 else
294 return val * 12;
295 } else
296 return val * 16;
297 }
298
299 static inline u8 FAN_TO_REG(long rpm, int div)
300 {
301 if (rpm == 0)
302 return 255;
303 rpm = SENSORS_LIMIT(rpm, 1, 1000000);
304 return SENSORS_LIMIT((1350000 + rpm * div / 2) / (rpm * div), 1,
305 254);
306 }
307
308 static inline u16 FAN16_TO_REG(long rpm)
309 {
310 if (rpm == 0)
311 return 0xffff;
312 return SENSORS_LIMIT((1350000 + rpm) / (rpm * 2), 1, 0xfffe);
313 }
314
315 #define FAN_FROM_REG(val, div) ((val) == 0 ? -1 : (val) == 255 ? 0 : \
316 1350000 / ((val) * (div)))
317 /* The divider is fixed to 2 in 16-bit mode */
318 #define FAN16_FROM_REG(val) ((val) == 0 ? -1 : (val) == 0xffff ? 0 : \
319 1350000 / ((val) * 2))
320
321 #define TEMP_TO_REG(val) (SENSORS_LIMIT(((val) < 0 ? (((val) - 500) / 1000) : \
322 ((val) + 500) / 1000), -128, 127))
323 #define TEMP_FROM_REG(val) ((val) * 1000)
324
325 static u8 pwm_to_reg(const struct it87_data *data, long val)
326 {
327 if (data->type == it8721)
328 return val;
329 else
330 return val >> 1;
331 }
332
333 static int pwm_from_reg(const struct it87_data *data, u8 reg)
334 {
335 if (data->type == it8721)
336 return reg;
337 else
338 return (reg & 0x7f) << 1;
339 }
340
341
342 static int DIV_TO_REG(int val)
343 {
344 int answer = 0;
345 while (answer < 7 && (val >>= 1))
346 answer++;
347 return answer;
348 }
349 #define DIV_FROM_REG(val) (1 << (val))
350
351 static const unsigned int pwm_freq[8] = {
352 48000000 / 128,
353 24000000 / 128,
354 12000000 / 128,
355 8000000 / 128,
356 6000000 / 128,
357 3000000 / 128,
358 1500000 / 128,
359 750000 / 128,
360 };
361
362 static inline int has_16bit_fans(const struct it87_data *data)
363 {
364 /* IT8705F Datasheet 0.4.1, 3h == Version G.
365 IT8712F Datasheet 0.9.1, section 8.3.5 indicates 8h == Version J.
366 These are the first revisions with 16bit tachometer support. */
367 return (data->type == it87 && data->revision >= 0x03)
368 || (data->type == it8712 && data->revision >= 0x08)
369 || data->type == it8716
370 || data->type == it8718
371 || data->type == it8720
372 || data->type == it8721;
373 }
374
375 static inline int has_old_autopwm(const struct it87_data *data)
376 {
377 /* The old automatic fan speed control interface is implemented
378 by IT8705F chips up to revision F and IT8712F chips up to
379 revision G. */
380 return (data->type == it87 && data->revision < 0x03)
381 || (data->type == it8712 && data->revision < 0x08);
382 }
383
384 static int it87_probe(struct platform_device *pdev);
385 static int __devexit it87_remove(struct platform_device *pdev);
386
387 static int it87_read_value(struct it87_data *data, u8 reg);
388 static void it87_write_value(struct it87_data *data, u8 reg, u8 value);
389 static struct it87_data *it87_update_device(struct device *dev);
390 static int it87_check_pwm(struct device *dev);
391 static void it87_init_device(struct platform_device *pdev);
392
393
394 static struct platform_driver it87_driver = {
395 .driver = {
396 .owner = THIS_MODULE,
397 .name = DRVNAME,
398 },
399 .probe = it87_probe,
400 .remove = __devexit_p(it87_remove),
401 };
402
403 static ssize_t show_in(struct device *dev, struct device_attribute *attr,
404 char *buf)
405 {
406 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
407 int nr = sensor_attr->index;
408
409 struct it87_data *data = it87_update_device(dev);
410 return sprintf(buf, "%d\n", in_from_reg(data, nr, data->in[nr]));
411 }
412
413 static ssize_t show_in_min(struct device *dev, struct device_attribute *attr,
414 char *buf)
415 {
416 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
417 int nr = sensor_attr->index;
418
419 struct it87_data *data = it87_update_device(dev);
420 return sprintf(buf, "%d\n", in_from_reg(data, nr, data->in_min[nr]));
421 }
422
423 static ssize_t show_in_max(struct device *dev, struct device_attribute *attr,
424 char *buf)
425 {
426 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
427 int nr = sensor_attr->index;
428
429 struct it87_data *data = it87_update_device(dev);
430 return sprintf(buf, "%d\n", in_from_reg(data, nr, data->in_max[nr]));
431 }
432
433 static ssize_t set_in_min(struct device *dev, struct device_attribute *attr,
434 const char *buf, size_t count)
435 {
436 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
437 int nr = sensor_attr->index;
438
439 struct it87_data *data = dev_get_drvdata(dev);
440 unsigned long val;
441
442 if (strict_strtoul(buf, 10, &val) < 0)
443 return -EINVAL;
444
445 mutex_lock(&data->update_lock);
446 data->in_min[nr] = in_to_reg(data, nr, val);
447 it87_write_value(data, IT87_REG_VIN_MIN(nr),
448 data->in_min[nr]);
449 mutex_unlock(&data->update_lock);
450 return count;
451 }
452 static ssize_t set_in_max(struct device *dev, struct device_attribute *attr,
453 const char *buf, size_t count)
454 {
455 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
456 int nr = sensor_attr->index;
457
458 struct it87_data *data = dev_get_drvdata(dev);
459 unsigned long val;
460
461 if (strict_strtoul(buf, 10, &val) < 0)
462 return -EINVAL;
463
464 mutex_lock(&data->update_lock);
465 data->in_max[nr] = in_to_reg(data, nr, val);
466 it87_write_value(data, IT87_REG_VIN_MAX(nr),
467 data->in_max[nr]);
468 mutex_unlock(&data->update_lock);
469 return count;
470 }
471
472 #define show_in_offset(offset) \
473 static SENSOR_DEVICE_ATTR(in##offset##_input, S_IRUGO, \
474 show_in, NULL, offset);
475
476 #define limit_in_offset(offset) \
477 static SENSOR_DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \
478 show_in_min, set_in_min, offset); \
479 static SENSOR_DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \
480 show_in_max, set_in_max, offset);
481
482 show_in_offset(0);
483 limit_in_offset(0);
484 show_in_offset(1);
485 limit_in_offset(1);
486 show_in_offset(2);
487 limit_in_offset(2);
488 show_in_offset(3);
489 limit_in_offset(3);
490 show_in_offset(4);
491 limit_in_offset(4);
492 show_in_offset(5);
493 limit_in_offset(5);
494 show_in_offset(6);
495 limit_in_offset(6);
496 show_in_offset(7);
497 limit_in_offset(7);
498 show_in_offset(8);
499
500 /* 3 temperatures */
501 static ssize_t show_temp(struct device *dev, struct device_attribute *attr,
502 char *buf)
503 {
504 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
505 int nr = sensor_attr->index;
506
507 struct it87_data *data = it87_update_device(dev);
508 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[nr]));
509 }
510 static ssize_t show_temp_max(struct device *dev, struct device_attribute *attr,
511 char *buf)
512 {
513 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
514 int nr = sensor_attr->index;
515
516 struct it87_data *data = it87_update_device(dev);
517 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_high[nr]));
518 }
519 static ssize_t show_temp_min(struct device *dev, struct device_attribute *attr,
520 char *buf)
521 {
522 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
523 int nr = sensor_attr->index;
524
525 struct it87_data *data = it87_update_device(dev);
526 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_low[nr]));
527 }
528 static ssize_t set_temp_max(struct device *dev, struct device_attribute *attr,
529 const char *buf, size_t count)
530 {
531 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
532 int nr = sensor_attr->index;
533
534 struct it87_data *data = dev_get_drvdata(dev);
535 long val;
536
537 if (strict_strtol(buf, 10, &val) < 0)
538 return -EINVAL;
539
540 mutex_lock(&data->update_lock);
541 data->temp_high[nr] = TEMP_TO_REG(val);
542 it87_write_value(data, IT87_REG_TEMP_HIGH(nr), data->temp_high[nr]);
543 mutex_unlock(&data->update_lock);
544 return count;
545 }
546 static ssize_t set_temp_min(struct device *dev, struct device_attribute *attr,
547 const char *buf, size_t count)
548 {
549 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
550 int nr = sensor_attr->index;
551
552 struct it87_data *data = dev_get_drvdata(dev);
553 long val;
554
555 if (strict_strtol(buf, 10, &val) < 0)
556 return -EINVAL;
557
558 mutex_lock(&data->update_lock);
559 data->temp_low[nr] = TEMP_TO_REG(val);
560 it87_write_value(data, IT87_REG_TEMP_LOW(nr), data->temp_low[nr]);
561 mutex_unlock(&data->update_lock);
562 return count;
563 }
564 #define show_temp_offset(offset) \
565 static SENSOR_DEVICE_ATTR(temp##offset##_input, S_IRUGO, \
566 show_temp, NULL, offset - 1); \
567 static SENSOR_DEVICE_ATTR(temp##offset##_max, S_IRUGO | S_IWUSR, \
568 show_temp_max, set_temp_max, offset - 1); \
569 static SENSOR_DEVICE_ATTR(temp##offset##_min, S_IRUGO | S_IWUSR, \
570 show_temp_min, set_temp_min, offset - 1);
571
572 show_temp_offset(1);
573 show_temp_offset(2);
574 show_temp_offset(3);
575
576 static ssize_t show_sensor(struct device *dev, struct device_attribute *attr,
577 char *buf)
578 {
579 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
580 int nr = sensor_attr->index;
581
582 struct it87_data *data = it87_update_device(dev);
583 u8 reg = data->sensor; /* In case the value is updated while
584 we use it */
585
586 if (reg & (1 << nr))
587 return sprintf(buf, "3\n"); /* thermal diode */
588 if (reg & (8 << nr))
589 return sprintf(buf, "4\n"); /* thermistor */
590 return sprintf(buf, "0\n"); /* disabled */
591 }
592 static ssize_t set_sensor(struct device *dev, struct device_attribute *attr,
593 const char *buf, size_t count)
594 {
595 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
596 int nr = sensor_attr->index;
597
598 struct it87_data *data = dev_get_drvdata(dev);
599 long val;
600 u8 reg;
601
602 if (strict_strtol(buf, 10, &val) < 0)
603 return -EINVAL;
604
605 reg = it87_read_value(data, IT87_REG_TEMP_ENABLE);
606 reg &= ~(1 << nr);
607 reg &= ~(8 << nr);
608 if (val == 2) { /* backwards compatibility */
609 dev_warn(dev, "Sensor type 2 is deprecated, please use 4 "
610 "instead\n");
611 val = 4;
612 }
613 /* 3 = thermal diode; 4 = thermistor; 0 = disabled */
614 if (val == 3)
615 reg |= 1 << nr;
616 else if (val == 4)
617 reg |= 8 << nr;
618 else if (val != 0)
619 return -EINVAL;
620
621 mutex_lock(&data->update_lock);
622 data->sensor = reg;
623 it87_write_value(data, IT87_REG_TEMP_ENABLE, data->sensor);
624 data->valid = 0; /* Force cache refresh */
625 mutex_unlock(&data->update_lock);
626 return count;
627 }
628 #define show_sensor_offset(offset) \
629 static SENSOR_DEVICE_ATTR(temp##offset##_type, S_IRUGO | S_IWUSR, \
630 show_sensor, set_sensor, offset - 1);
631
632 show_sensor_offset(1);
633 show_sensor_offset(2);
634 show_sensor_offset(3);
635
636 /* 3 Fans */
637
638 static int pwm_mode(const struct it87_data *data, int nr)
639 {
640 int ctrl = data->fan_main_ctrl & (1 << nr);
641
642 if (ctrl == 0) /* Full speed */
643 return 0;
644 if (data->pwm_ctrl[nr] & 0x80) /* Automatic mode */
645 return 2;
646 else /* Manual mode */
647 return 1;
648 }
649
650 static ssize_t show_fan(struct device *dev, struct device_attribute *attr,
651 char *buf)
652 {
653 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
654 int nr = sensor_attr->index;
655
656 struct it87_data *data = it87_update_device(dev);
657 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[nr],
658 DIV_FROM_REG(data->fan_div[nr])));
659 }
660 static ssize_t show_fan_min(struct device *dev, struct device_attribute *attr,
661 char *buf)
662 {
663 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
664 int nr = sensor_attr->index;
665
666 struct it87_data *data = it87_update_device(dev);
667 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[nr],
668 DIV_FROM_REG(data->fan_div[nr])));
669 }
670 static ssize_t show_fan_div(struct device *dev, struct device_attribute *attr,
671 char *buf)
672 {
673 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
674 int nr = sensor_attr->index;
675
676 struct it87_data *data = it87_update_device(dev);
677 return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr]));
678 }
679 static ssize_t show_pwm_enable(struct device *dev,
680 struct device_attribute *attr, char *buf)
681 {
682 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
683 int nr = sensor_attr->index;
684
685 struct it87_data *data = it87_update_device(dev);
686 return sprintf(buf, "%d\n", pwm_mode(data, nr));
687 }
688 static ssize_t show_pwm(struct device *dev, struct device_attribute *attr,
689 char *buf)
690 {
691 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
692 int nr = sensor_attr->index;
693
694 struct it87_data *data = it87_update_device(dev);
695 return sprintf(buf, "%d\n",
696 pwm_from_reg(data, data->pwm_duty[nr]));
697 }
698 static ssize_t show_pwm_freq(struct device *dev, struct device_attribute *attr,
699 char *buf)
700 {
701 struct it87_data *data = it87_update_device(dev);
702 int index = (data->fan_ctl >> 4) & 0x07;
703
704 return sprintf(buf, "%u\n", pwm_freq[index]);
705 }
706 static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr,
707 const char *buf, size_t count)
708 {
709 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
710 int nr = sensor_attr->index;
711
712 struct it87_data *data = dev_get_drvdata(dev);
713 long val;
714 u8 reg;
715
716 if (strict_strtol(buf, 10, &val) < 0)
717 return -EINVAL;
718
719 mutex_lock(&data->update_lock);
720 reg = it87_read_value(data, IT87_REG_FAN_DIV);
721 switch (nr) {
722 case 0:
723 data->fan_div[nr] = reg & 0x07;
724 break;
725 case 1:
726 data->fan_div[nr] = (reg >> 3) & 0x07;
727 break;
728 case 2:
729 data->fan_div[nr] = (reg & 0x40) ? 3 : 1;
730 break;
731 }
732
733 data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr]));
734 it87_write_value(data, IT87_REG_FAN_MIN[nr], data->fan_min[nr]);
735 mutex_unlock(&data->update_lock);
736 return count;
737 }
738 static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr,
739 const char *buf, size_t count)
740 {
741 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
742 int nr = sensor_attr->index;
743
744 struct it87_data *data = dev_get_drvdata(dev);
745 unsigned long val;
746 int min;
747 u8 old;
748
749 if (strict_strtoul(buf, 10, &val) < 0)
750 return -EINVAL;
751
752 mutex_lock(&data->update_lock);
753 old = it87_read_value(data, IT87_REG_FAN_DIV);
754
755 /* Save fan min limit */
756 min = FAN_FROM_REG(data->fan_min[nr], DIV_FROM_REG(data->fan_div[nr]));
757
758 switch (nr) {
759 case 0:
760 case 1:
761 data->fan_div[nr] = DIV_TO_REG(val);
762 break;
763 case 2:
764 if (val < 8)
765 data->fan_div[nr] = 1;
766 else
767 data->fan_div[nr] = 3;
768 }
769 val = old & 0x80;
770 val |= (data->fan_div[0] & 0x07);
771 val |= (data->fan_div[1] & 0x07) << 3;
772 if (data->fan_div[2] == 3)
773 val |= 0x1 << 6;
774 it87_write_value(data, IT87_REG_FAN_DIV, val);
775
776 /* Restore fan min limit */
777 data->fan_min[nr] = FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr]));
778 it87_write_value(data, IT87_REG_FAN_MIN[nr], data->fan_min[nr]);
779
780 mutex_unlock(&data->update_lock);
781 return count;
782 }
783
784 /* Returns 0 if OK, -EINVAL otherwise */
785 static int check_trip_points(struct device *dev, int nr)
786 {
787 const struct it87_data *data = dev_get_drvdata(dev);
788 int i, err = 0;
789
790 if (has_old_autopwm(data)) {
791 for (i = 0; i < 3; i++) {
792 if (data->auto_temp[nr][i] > data->auto_temp[nr][i + 1])
793 err = -EINVAL;
794 }
795 for (i = 0; i < 2; i++) {
796 if (data->auto_pwm[nr][i] > data->auto_pwm[nr][i + 1])
797 err = -EINVAL;
798 }
799 }
800
801 if (err) {
802 dev_err(dev, "Inconsistent trip points, not switching to "
803 "automatic mode\n");
804 dev_err(dev, "Adjust the trip points and try again\n");
805 }
806 return err;
807 }
808
809 static ssize_t set_pwm_enable(struct device *dev,
810 struct device_attribute *attr, const char *buf, size_t count)
811 {
812 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
813 int nr = sensor_attr->index;
814
815 struct it87_data *data = dev_get_drvdata(dev);
816 long val;
817
818 if (strict_strtol(buf, 10, &val) < 0 || val < 0 || val > 2)
819 return -EINVAL;
820
821 /* Check trip points before switching to automatic mode */
822 if (val == 2) {
823 if (check_trip_points(dev, nr) < 0)
824 return -EINVAL;
825 }
826
827 mutex_lock(&data->update_lock);
828
829 if (val == 0) {
830 int tmp;
831 /* make sure the fan is on when in on/off mode */
832 tmp = it87_read_value(data, IT87_REG_FAN_CTL);
833 it87_write_value(data, IT87_REG_FAN_CTL, tmp | (1 << nr));
834 /* set on/off mode */
835 data->fan_main_ctrl &= ~(1 << nr);
836 it87_write_value(data, IT87_REG_FAN_MAIN_CTRL,
837 data->fan_main_ctrl);
838 } else {
839 if (val == 1) /* Manual mode */
840 data->pwm_ctrl[nr] = data->type == it8721 ?
841 data->pwm_temp_map[nr] :
842 data->pwm_duty[nr];
843 else /* Automatic mode */
844 data->pwm_ctrl[nr] = 0x80 | data->pwm_temp_map[nr];
845 it87_write_value(data, IT87_REG_PWM(nr), data->pwm_ctrl[nr]);
846 /* set SmartGuardian mode */
847 data->fan_main_ctrl |= (1 << nr);
848 it87_write_value(data, IT87_REG_FAN_MAIN_CTRL,
849 data->fan_main_ctrl);
850 }
851
852 mutex_unlock(&data->update_lock);
853 return count;
854 }
855 static ssize_t set_pwm(struct device *dev, struct device_attribute *attr,
856 const char *buf, size_t count)
857 {
858 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
859 int nr = sensor_attr->index;
860
861 struct it87_data *data = dev_get_drvdata(dev);
862 long val;
863
864 if (strict_strtol(buf, 10, &val) < 0 || val < 0 || val > 255)
865 return -EINVAL;
866
867 mutex_lock(&data->update_lock);
868 if (data->type == it8721) {
869 /* If we are in automatic mode, the PWM duty cycle register
870 * is read-only so we can't write the value */
871 if (data->pwm_ctrl[nr] & 0x80) {
872 mutex_unlock(&data->update_lock);
873 return -EBUSY;
874 }
875 data->pwm_duty[nr] = pwm_to_reg(data, val);
876 it87_write_value(data, IT87_REG_PWM_DUTY(nr),
877 data->pwm_duty[nr]);
878 } else {
879 data->pwm_duty[nr] = pwm_to_reg(data, val);
880 /* If we are in manual mode, write the duty cycle immediately;
881 * otherwise, just store it for later use. */
882 if (!(data->pwm_ctrl[nr] & 0x80)) {
883 data->pwm_ctrl[nr] = data->pwm_duty[nr];
884 it87_write_value(data, IT87_REG_PWM(nr),
885 data->pwm_ctrl[nr]);
886 }
887 }
888 mutex_unlock(&data->update_lock);
889 return count;
890 }
891 static ssize_t set_pwm_freq(struct device *dev,
892 struct device_attribute *attr, const char *buf, size_t count)
893 {
894 struct it87_data *data = dev_get_drvdata(dev);
895 unsigned long val;
896 int i;
897
898 if (strict_strtoul(buf, 10, &val) < 0)
899 return -EINVAL;
900
901 /* Search for the nearest available frequency */
902 for (i = 0; i < 7; i++) {
903 if (val > (pwm_freq[i] + pwm_freq[i+1]) / 2)
904 break;
905 }
906
907 mutex_lock(&data->update_lock);
908 data->fan_ctl = it87_read_value(data, IT87_REG_FAN_CTL) & 0x8f;
909 data->fan_ctl |= i << 4;
910 it87_write_value(data, IT87_REG_FAN_CTL, data->fan_ctl);
911 mutex_unlock(&data->update_lock);
912
913 return count;
914 }
915 static ssize_t show_pwm_temp_map(struct device *dev,
916 struct device_attribute *attr, char *buf)
917 {
918 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
919 int nr = sensor_attr->index;
920
921 struct it87_data *data = it87_update_device(dev);
922 int map;
923
924 if (data->pwm_temp_map[nr] < 3)
925 map = 1 << data->pwm_temp_map[nr];
926 else
927 map = 0; /* Should never happen */
928 return sprintf(buf, "%d\n", map);
929 }
930 static ssize_t set_pwm_temp_map(struct device *dev,
931 struct device_attribute *attr, const char *buf, size_t count)
932 {
933 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
934 int nr = sensor_attr->index;
935
936 struct it87_data *data = dev_get_drvdata(dev);
937 long val;
938 u8 reg;
939
940 /* This check can go away if we ever support automatic fan speed
941 control on newer chips. */
942 if (!has_old_autopwm(data)) {
943 dev_notice(dev, "Mapping change disabled for safety reasons\n");
944 return -EINVAL;
945 }
946
947 if (strict_strtol(buf, 10, &val) < 0)
948 return -EINVAL;
949
950 switch (val) {
951 case (1 << 0):
952 reg = 0x00;
953 break;
954 case (1 << 1):
955 reg = 0x01;
956 break;
957 case (1 << 2):
958 reg = 0x02;
959 break;
960 default:
961 return -EINVAL;
962 }
963
964 mutex_lock(&data->update_lock);
965 data->pwm_temp_map[nr] = reg;
966 /* If we are in automatic mode, write the temp mapping immediately;
967 * otherwise, just store it for later use. */
968 if (data->pwm_ctrl[nr] & 0x80) {
969 data->pwm_ctrl[nr] = 0x80 | data->pwm_temp_map[nr];
970 it87_write_value(data, IT87_REG_PWM(nr), data->pwm_ctrl[nr]);
971 }
972 mutex_unlock(&data->update_lock);
973 return count;
974 }
975
976 static ssize_t show_auto_pwm(struct device *dev,
977 struct device_attribute *attr, char *buf)
978 {
979 struct it87_data *data = it87_update_device(dev);
980 struct sensor_device_attribute_2 *sensor_attr =
981 to_sensor_dev_attr_2(attr);
982 int nr = sensor_attr->nr;
983 int point = sensor_attr->index;
984
985 return sprintf(buf, "%d\n",
986 pwm_from_reg(data, data->auto_pwm[nr][point]));
987 }
988
989 static ssize_t set_auto_pwm(struct device *dev,
990 struct device_attribute *attr, const char *buf, size_t count)
991 {
992 struct it87_data *data = dev_get_drvdata(dev);
993 struct sensor_device_attribute_2 *sensor_attr =
994 to_sensor_dev_attr_2(attr);
995 int nr = sensor_attr->nr;
996 int point = sensor_attr->index;
997 long val;
998
999 if (strict_strtol(buf, 10, &val) < 0 || val < 0 || val > 255)
1000 return -EINVAL;
1001
1002 mutex_lock(&data->update_lock);
1003 data->auto_pwm[nr][point] = pwm_to_reg(data, val);
1004 it87_write_value(data, IT87_REG_AUTO_PWM(nr, point),
1005 data->auto_pwm[nr][point]);
1006 mutex_unlock(&data->update_lock);
1007 return count;
1008 }
1009
1010 static ssize_t show_auto_temp(struct device *dev,
1011 struct device_attribute *attr, char *buf)
1012 {
1013 struct it87_data *data = it87_update_device(dev);
1014 struct sensor_device_attribute_2 *sensor_attr =
1015 to_sensor_dev_attr_2(attr);
1016 int nr = sensor_attr->nr;
1017 int point = sensor_attr->index;
1018
1019 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->auto_temp[nr][point]));
1020 }
1021
1022 static ssize_t set_auto_temp(struct device *dev,
1023 struct device_attribute *attr, const char *buf, size_t count)
1024 {
1025 struct it87_data *data = dev_get_drvdata(dev);
1026 struct sensor_device_attribute_2 *sensor_attr =
1027 to_sensor_dev_attr_2(attr);
1028 int nr = sensor_attr->nr;
1029 int point = sensor_attr->index;
1030 long val;
1031
1032 if (strict_strtol(buf, 10, &val) < 0 || val < -128000 || val > 127000)
1033 return -EINVAL;
1034
1035 mutex_lock(&data->update_lock);
1036 data->auto_temp[nr][point] = TEMP_TO_REG(val);
1037 it87_write_value(data, IT87_REG_AUTO_TEMP(nr, point),
1038 data->auto_temp[nr][point]);
1039 mutex_unlock(&data->update_lock);
1040 return count;
1041 }
1042
1043 #define show_fan_offset(offset) \
1044 static SENSOR_DEVICE_ATTR(fan##offset##_input, S_IRUGO, \
1045 show_fan, NULL, offset - 1); \
1046 static SENSOR_DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \
1047 show_fan_min, set_fan_min, offset - 1); \
1048 static SENSOR_DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR, \
1049 show_fan_div, set_fan_div, offset - 1);
1050
1051 show_fan_offset(1);
1052 show_fan_offset(2);
1053 show_fan_offset(3);
1054
1055 #define show_pwm_offset(offset) \
1056 static SENSOR_DEVICE_ATTR(pwm##offset##_enable, S_IRUGO | S_IWUSR, \
1057 show_pwm_enable, set_pwm_enable, offset - 1); \
1058 static SENSOR_DEVICE_ATTR(pwm##offset, S_IRUGO | S_IWUSR, \
1059 show_pwm, set_pwm, offset - 1); \
1060 static DEVICE_ATTR(pwm##offset##_freq, \
1061 (offset == 1 ? S_IRUGO | S_IWUSR : S_IRUGO), \
1062 show_pwm_freq, (offset == 1 ? set_pwm_freq : NULL)); \
1063 static SENSOR_DEVICE_ATTR(pwm##offset##_auto_channels_temp, \
1064 S_IRUGO | S_IWUSR, show_pwm_temp_map, set_pwm_temp_map, \
1065 offset - 1); \
1066 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point1_pwm, \
1067 S_IRUGO | S_IWUSR, show_auto_pwm, set_auto_pwm, \
1068 offset - 1, 0); \
1069 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point2_pwm, \
1070 S_IRUGO | S_IWUSR, show_auto_pwm, set_auto_pwm, \
1071 offset - 1, 1); \
1072 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point3_pwm, \
1073 S_IRUGO | S_IWUSR, show_auto_pwm, set_auto_pwm, \
1074 offset - 1, 2); \
1075 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point4_pwm, \
1076 S_IRUGO, show_auto_pwm, NULL, offset - 1, 3); \
1077 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point1_temp, \
1078 S_IRUGO | S_IWUSR, show_auto_temp, set_auto_temp, \
1079 offset - 1, 1); \
1080 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point1_temp_hyst, \
1081 S_IRUGO | S_IWUSR, show_auto_temp, set_auto_temp, \
1082 offset - 1, 0); \
1083 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point2_temp, \
1084 S_IRUGO | S_IWUSR, show_auto_temp, set_auto_temp, \
1085 offset - 1, 2); \
1086 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point3_temp, \
1087 S_IRUGO | S_IWUSR, show_auto_temp, set_auto_temp, \
1088 offset - 1, 3); \
1089 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point4_temp, \
1090 S_IRUGO | S_IWUSR, show_auto_temp, set_auto_temp, \
1091 offset - 1, 4);
1092
1093 show_pwm_offset(1);
1094 show_pwm_offset(2);
1095 show_pwm_offset(3);
1096
1097 /* A different set of callbacks for 16-bit fans */
1098 static ssize_t show_fan16(struct device *dev, struct device_attribute *attr,
1099 char *buf)
1100 {
1101 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
1102 int nr = sensor_attr->index;
1103 struct it87_data *data = it87_update_device(dev);
1104 return sprintf(buf, "%d\n", FAN16_FROM_REG(data->fan[nr]));
1105 }
1106
1107 static ssize_t show_fan16_min(struct device *dev, struct device_attribute *attr,
1108 char *buf)
1109 {
1110 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
1111 int nr = sensor_attr->index;
1112 struct it87_data *data = it87_update_device(dev);
1113 return sprintf(buf, "%d\n", FAN16_FROM_REG(data->fan_min[nr]));
1114 }
1115
1116 static ssize_t set_fan16_min(struct device *dev, struct device_attribute *attr,
1117 const char *buf, size_t count)
1118 {
1119 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
1120 int nr = sensor_attr->index;
1121 struct it87_data *data = dev_get_drvdata(dev);
1122 long val;
1123
1124 if (strict_strtol(buf, 10, &val) < 0)
1125 return -EINVAL;
1126
1127 mutex_lock(&data->update_lock);
1128 data->fan_min[nr] = FAN16_TO_REG(val);
1129 it87_write_value(data, IT87_REG_FAN_MIN[nr],
1130 data->fan_min[nr] & 0xff);
1131 it87_write_value(data, IT87_REG_FANX_MIN[nr],
1132 data->fan_min[nr] >> 8);
1133 mutex_unlock(&data->update_lock);
1134 return count;
1135 }
1136
1137 /* We want to use the same sysfs file names as 8-bit fans, but we need
1138 different variable names, so we have to use SENSOR_ATTR instead of
1139 SENSOR_DEVICE_ATTR. */
1140 #define show_fan16_offset(offset) \
1141 static struct sensor_device_attribute sensor_dev_attr_fan##offset##_input16 \
1142 = SENSOR_ATTR(fan##offset##_input, S_IRUGO, \
1143 show_fan16, NULL, offset - 1); \
1144 static struct sensor_device_attribute sensor_dev_attr_fan##offset##_min16 \
1145 = SENSOR_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \
1146 show_fan16_min, set_fan16_min, offset - 1)
1147
1148 show_fan16_offset(1);
1149 show_fan16_offset(2);
1150 show_fan16_offset(3);
1151 show_fan16_offset(4);
1152 show_fan16_offset(5);
1153
1154 /* Alarms */
1155 static ssize_t show_alarms(struct device *dev, struct device_attribute *attr,
1156 char *buf)
1157 {
1158 struct it87_data *data = it87_update_device(dev);
1159 return sprintf(buf, "%u\n", data->alarms);
1160 }
1161 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
1162
1163 static ssize_t show_alarm(struct device *dev, struct device_attribute *attr,
1164 char *buf)
1165 {
1166 int bitnr = to_sensor_dev_attr(attr)->index;
1167 struct it87_data *data = it87_update_device(dev);
1168 return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1);
1169 }
1170 static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 8);
1171 static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 9);
1172 static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 10);
1173 static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 11);
1174 static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 12);
1175 static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 13);
1176 static SENSOR_DEVICE_ATTR(in6_alarm, S_IRUGO, show_alarm, NULL, 14);
1177 static SENSOR_DEVICE_ATTR(in7_alarm, S_IRUGO, show_alarm, NULL, 15);
1178 static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 0);
1179 static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 1);
1180 static SENSOR_DEVICE_ATTR(fan3_alarm, S_IRUGO, show_alarm, NULL, 2);
1181 static SENSOR_DEVICE_ATTR(fan4_alarm, S_IRUGO, show_alarm, NULL, 3);
1182 static SENSOR_DEVICE_ATTR(fan5_alarm, S_IRUGO, show_alarm, NULL, 6);
1183 static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 16);
1184 static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 17);
1185 static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL, 18);
1186
1187 static ssize_t show_beep(struct device *dev, struct device_attribute *attr,
1188 char *buf)
1189 {
1190 int bitnr = to_sensor_dev_attr(attr)->index;
1191 struct it87_data *data = it87_update_device(dev);
1192 return sprintf(buf, "%u\n", (data->beeps >> bitnr) & 1);
1193 }
1194 static ssize_t set_beep(struct device *dev, struct device_attribute *attr,
1195 const char *buf, size_t count)
1196 {
1197 int bitnr = to_sensor_dev_attr(attr)->index;
1198 struct it87_data *data = dev_get_drvdata(dev);
1199 long val;
1200
1201 if (strict_strtol(buf, 10, &val) < 0
1202 || (val != 0 && val != 1))
1203 return -EINVAL;
1204
1205 mutex_lock(&data->update_lock);
1206 data->beeps = it87_read_value(data, IT87_REG_BEEP_ENABLE);
1207 if (val)
1208 data->beeps |= (1 << bitnr);
1209 else
1210 data->beeps &= ~(1 << bitnr);
1211 it87_write_value(data, IT87_REG_BEEP_ENABLE, data->beeps);
1212 mutex_unlock(&data->update_lock);
1213 return count;
1214 }
1215
1216 static SENSOR_DEVICE_ATTR(in0_beep, S_IRUGO | S_IWUSR,
1217 show_beep, set_beep, 1);
1218 static SENSOR_DEVICE_ATTR(in1_beep, S_IRUGO, show_beep, NULL, 1);
1219 static SENSOR_DEVICE_ATTR(in2_beep, S_IRUGO, show_beep, NULL, 1);
1220 static SENSOR_DEVICE_ATTR(in3_beep, S_IRUGO, show_beep, NULL, 1);
1221 static SENSOR_DEVICE_ATTR(in4_beep, S_IRUGO, show_beep, NULL, 1);
1222 static SENSOR_DEVICE_ATTR(in5_beep, S_IRUGO, show_beep, NULL, 1);
1223 static SENSOR_DEVICE_ATTR(in6_beep, S_IRUGO, show_beep, NULL, 1);
1224 static SENSOR_DEVICE_ATTR(in7_beep, S_IRUGO, show_beep, NULL, 1);
1225 /* fanX_beep writability is set later */
1226 static SENSOR_DEVICE_ATTR(fan1_beep, S_IRUGO, show_beep, set_beep, 0);
1227 static SENSOR_DEVICE_ATTR(fan2_beep, S_IRUGO, show_beep, set_beep, 0);
1228 static SENSOR_DEVICE_ATTR(fan3_beep, S_IRUGO, show_beep, set_beep, 0);
1229 static SENSOR_DEVICE_ATTR(fan4_beep, S_IRUGO, show_beep, set_beep, 0);
1230 static SENSOR_DEVICE_ATTR(fan5_beep, S_IRUGO, show_beep, set_beep, 0);
1231 static SENSOR_DEVICE_ATTR(temp1_beep, S_IRUGO | S_IWUSR,
1232 show_beep, set_beep, 2);
1233 static SENSOR_DEVICE_ATTR(temp2_beep, S_IRUGO, show_beep, NULL, 2);
1234 static SENSOR_DEVICE_ATTR(temp3_beep, S_IRUGO, show_beep, NULL, 2);
1235
1236 static ssize_t show_vrm_reg(struct device *dev, struct device_attribute *attr,
1237 char *buf)
1238 {
1239 struct it87_data *data = dev_get_drvdata(dev);
1240 return sprintf(buf, "%u\n", data->vrm);
1241 }
1242 static ssize_t store_vrm_reg(struct device *dev, struct device_attribute *attr,
1243 const char *buf, size_t count)
1244 {
1245 struct it87_data *data = dev_get_drvdata(dev);
1246 unsigned long val;
1247
1248 if (strict_strtoul(buf, 10, &val) < 0)
1249 return -EINVAL;
1250
1251 data->vrm = val;
1252
1253 return count;
1254 }
1255 static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm_reg, store_vrm_reg);
1256
1257 static ssize_t show_vid_reg(struct device *dev, struct device_attribute *attr,
1258 char *buf)
1259 {
1260 struct it87_data *data = it87_update_device(dev);
1261 return sprintf(buf, "%ld\n", (long) vid_from_reg(data->vid, data->vrm));
1262 }
1263 static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid_reg, NULL);
1264
1265 static ssize_t show_label(struct device *dev, struct device_attribute *attr,
1266 char *buf)
1267 {
1268 static const char *labels[] = {
1269 "+5V",
1270 "5VSB",
1271 "Vbat",
1272 };
1273 static const char *labels_it8721[] = {
1274 "+3.3V",
1275 "3VSB",
1276 "Vbat",
1277 };
1278 struct it87_data *data = dev_get_drvdata(dev);
1279 int nr = to_sensor_dev_attr(attr)->index;
1280
1281 return sprintf(buf, "%s\n", data->type == it8721 ? labels_it8721[nr]
1282 : labels[nr]);
1283 }
1284 static SENSOR_DEVICE_ATTR(in3_label, S_IRUGO, show_label, NULL, 0);
1285 static SENSOR_DEVICE_ATTR(in7_label, S_IRUGO, show_label, NULL, 1);
1286 static SENSOR_DEVICE_ATTR(in8_label, S_IRUGO, show_label, NULL, 2);
1287
1288 static ssize_t show_name(struct device *dev, struct device_attribute
1289 *devattr, char *buf)
1290 {
1291 struct it87_data *data = dev_get_drvdata(dev);
1292 return sprintf(buf, "%s\n", data->name);
1293 }
1294 static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
1295
1296 static struct attribute *it87_attributes[] = {
1297 &sensor_dev_attr_in0_input.dev_attr.attr,
1298 &sensor_dev_attr_in1_input.dev_attr.attr,
1299 &sensor_dev_attr_in2_input.dev_attr.attr,
1300 &sensor_dev_attr_in3_input.dev_attr.attr,
1301 &sensor_dev_attr_in4_input.dev_attr.attr,
1302 &sensor_dev_attr_in5_input.dev_attr.attr,
1303 &sensor_dev_attr_in6_input.dev_attr.attr,
1304 &sensor_dev_attr_in7_input.dev_attr.attr,
1305 &sensor_dev_attr_in8_input.dev_attr.attr,
1306 &sensor_dev_attr_in0_min.dev_attr.attr,
1307 &sensor_dev_attr_in1_min.dev_attr.attr,
1308 &sensor_dev_attr_in2_min.dev_attr.attr,
1309 &sensor_dev_attr_in3_min.dev_attr.attr,
1310 &sensor_dev_attr_in4_min.dev_attr.attr,
1311 &sensor_dev_attr_in5_min.dev_attr.attr,
1312 &sensor_dev_attr_in6_min.dev_attr.attr,
1313 &sensor_dev_attr_in7_min.dev_attr.attr,
1314 &sensor_dev_attr_in0_max.dev_attr.attr,
1315 &sensor_dev_attr_in1_max.dev_attr.attr,
1316 &sensor_dev_attr_in2_max.dev_attr.attr,
1317 &sensor_dev_attr_in3_max.dev_attr.attr,
1318 &sensor_dev_attr_in4_max.dev_attr.attr,
1319 &sensor_dev_attr_in5_max.dev_attr.attr,
1320 &sensor_dev_attr_in6_max.dev_attr.attr,
1321 &sensor_dev_attr_in7_max.dev_attr.attr,
1322 &sensor_dev_attr_in0_alarm.dev_attr.attr,
1323 &sensor_dev_attr_in1_alarm.dev_attr.attr,
1324 &sensor_dev_attr_in2_alarm.dev_attr.attr,
1325 &sensor_dev_attr_in3_alarm.dev_attr.attr,
1326 &sensor_dev_attr_in4_alarm.dev_attr.attr,
1327 &sensor_dev_attr_in5_alarm.dev_attr.attr,
1328 &sensor_dev_attr_in6_alarm.dev_attr.attr,
1329 &sensor_dev_attr_in7_alarm.dev_attr.attr,
1330
1331 &sensor_dev_attr_temp1_input.dev_attr.attr,
1332 &sensor_dev_attr_temp2_input.dev_attr.attr,
1333 &sensor_dev_attr_temp3_input.dev_attr.attr,
1334 &sensor_dev_attr_temp1_max.dev_attr.attr,
1335 &sensor_dev_attr_temp2_max.dev_attr.attr,
1336 &sensor_dev_attr_temp3_max.dev_attr.attr,
1337 &sensor_dev_attr_temp1_min.dev_attr.attr,
1338 &sensor_dev_attr_temp2_min.dev_attr.attr,
1339 &sensor_dev_attr_temp3_min.dev_attr.attr,
1340 &sensor_dev_attr_temp1_type.dev_attr.attr,
1341 &sensor_dev_attr_temp2_type.dev_attr.attr,
1342 &sensor_dev_attr_temp3_type.dev_attr.attr,
1343 &sensor_dev_attr_temp1_alarm.dev_attr.attr,
1344 &sensor_dev_attr_temp2_alarm.dev_attr.attr,
1345 &sensor_dev_attr_temp3_alarm.dev_attr.attr,
1346
1347 &dev_attr_alarms.attr,
1348 &dev_attr_name.attr,
1349 NULL
1350 };
1351
1352 static const struct attribute_group it87_group = {
1353 .attrs = it87_attributes,
1354 };
1355
1356 static struct attribute *it87_attributes_beep[] = {
1357 &sensor_dev_attr_in0_beep.dev_attr.attr,
1358 &sensor_dev_attr_in1_beep.dev_attr.attr,
1359 &sensor_dev_attr_in2_beep.dev_attr.attr,
1360 &sensor_dev_attr_in3_beep.dev_attr.attr,
1361 &sensor_dev_attr_in4_beep.dev_attr.attr,
1362 &sensor_dev_attr_in5_beep.dev_attr.attr,
1363 &sensor_dev_attr_in6_beep.dev_attr.attr,
1364 &sensor_dev_attr_in7_beep.dev_attr.attr,
1365
1366 &sensor_dev_attr_temp1_beep.dev_attr.attr,
1367 &sensor_dev_attr_temp2_beep.dev_attr.attr,
1368 &sensor_dev_attr_temp3_beep.dev_attr.attr,
1369 NULL
1370 };
1371
1372 static const struct attribute_group it87_group_beep = {
1373 .attrs = it87_attributes_beep,
1374 };
1375
1376 static struct attribute *it87_attributes_fan16[5][3+1] = { {
1377 &sensor_dev_attr_fan1_input16.dev_attr.attr,
1378 &sensor_dev_attr_fan1_min16.dev_attr.attr,
1379 &sensor_dev_attr_fan1_alarm.dev_attr.attr,
1380 NULL
1381 }, {
1382 &sensor_dev_attr_fan2_input16.dev_attr.attr,
1383 &sensor_dev_attr_fan2_min16.dev_attr.attr,
1384 &sensor_dev_attr_fan2_alarm.dev_attr.attr,
1385 NULL
1386 }, {
1387 &sensor_dev_attr_fan3_input16.dev_attr.attr,
1388 &sensor_dev_attr_fan3_min16.dev_attr.attr,
1389 &sensor_dev_attr_fan3_alarm.dev_attr.attr,
1390 NULL
1391 }, {
1392 &sensor_dev_attr_fan4_input16.dev_attr.attr,
1393 &sensor_dev_attr_fan4_min16.dev_attr.attr,
1394 &sensor_dev_attr_fan4_alarm.dev_attr.attr,
1395 NULL
1396 }, {
1397 &sensor_dev_attr_fan5_input16.dev_attr.attr,
1398 &sensor_dev_attr_fan5_min16.dev_attr.attr,
1399 &sensor_dev_attr_fan5_alarm.dev_attr.attr,
1400 NULL
1401 } };
1402
1403 static const struct attribute_group it87_group_fan16[5] = {
1404 { .attrs = it87_attributes_fan16[0] },
1405 { .attrs = it87_attributes_fan16[1] },
1406 { .attrs = it87_attributes_fan16[2] },
1407 { .attrs = it87_attributes_fan16[3] },
1408 { .attrs = it87_attributes_fan16[4] },
1409 };
1410
1411 static struct attribute *it87_attributes_fan[3][4+1] = { {
1412 &sensor_dev_attr_fan1_input.dev_attr.attr,
1413 &sensor_dev_attr_fan1_min.dev_attr.attr,
1414 &sensor_dev_attr_fan1_div.dev_attr.attr,
1415 &sensor_dev_attr_fan1_alarm.dev_attr.attr,
1416 NULL
1417 }, {
1418 &sensor_dev_attr_fan2_input.dev_attr.attr,
1419 &sensor_dev_attr_fan2_min.dev_attr.attr,
1420 &sensor_dev_attr_fan2_div.dev_attr.attr,
1421 &sensor_dev_attr_fan2_alarm.dev_attr.attr,
1422 NULL
1423 }, {
1424 &sensor_dev_attr_fan3_input.dev_attr.attr,
1425 &sensor_dev_attr_fan3_min.dev_attr.attr,
1426 &sensor_dev_attr_fan3_div.dev_attr.attr,
1427 &sensor_dev_attr_fan3_alarm.dev_attr.attr,
1428 NULL
1429 } };
1430
1431 static const struct attribute_group it87_group_fan[3] = {
1432 { .attrs = it87_attributes_fan[0] },
1433 { .attrs = it87_attributes_fan[1] },
1434 { .attrs = it87_attributes_fan[2] },
1435 };
1436
1437 static const struct attribute_group *
1438 it87_get_fan_group(const struct it87_data *data)
1439 {
1440 return has_16bit_fans(data) ? it87_group_fan16 : it87_group_fan;
1441 }
1442
1443 static struct attribute *it87_attributes_pwm[3][4+1] = { {
1444 &sensor_dev_attr_pwm1_enable.dev_attr.attr,
1445 &sensor_dev_attr_pwm1.dev_attr.attr,
1446 &dev_attr_pwm1_freq.attr,
1447 &sensor_dev_attr_pwm1_auto_channels_temp.dev_attr.attr,
1448 NULL
1449 }, {
1450 &sensor_dev_attr_pwm2_enable.dev_attr.attr,
1451 &sensor_dev_attr_pwm2.dev_attr.attr,
1452 &dev_attr_pwm2_freq.attr,
1453 &sensor_dev_attr_pwm2_auto_channels_temp.dev_attr.attr,
1454 NULL
1455 }, {
1456 &sensor_dev_attr_pwm3_enable.dev_attr.attr,
1457 &sensor_dev_attr_pwm3.dev_attr.attr,
1458 &dev_attr_pwm3_freq.attr,
1459 &sensor_dev_attr_pwm3_auto_channels_temp.dev_attr.attr,
1460 NULL
1461 } };
1462
1463 static const struct attribute_group it87_group_pwm[3] = {
1464 { .attrs = it87_attributes_pwm[0] },
1465 { .attrs = it87_attributes_pwm[1] },
1466 { .attrs = it87_attributes_pwm[2] },
1467 };
1468
1469 static struct attribute *it87_attributes_autopwm[3][9+1] = { {
1470 &sensor_dev_attr_pwm1_auto_point1_pwm.dev_attr.attr,
1471 &sensor_dev_attr_pwm1_auto_point2_pwm.dev_attr.attr,
1472 &sensor_dev_attr_pwm1_auto_point3_pwm.dev_attr.attr,
1473 &sensor_dev_attr_pwm1_auto_point4_pwm.dev_attr.attr,
1474 &sensor_dev_attr_pwm1_auto_point1_temp.dev_attr.attr,
1475 &sensor_dev_attr_pwm1_auto_point1_temp_hyst.dev_attr.attr,
1476 &sensor_dev_attr_pwm1_auto_point2_temp.dev_attr.attr,
1477 &sensor_dev_attr_pwm1_auto_point3_temp.dev_attr.attr,
1478 &sensor_dev_attr_pwm1_auto_point4_temp.dev_attr.attr,
1479 NULL
1480 }, {
1481 &sensor_dev_attr_pwm2_auto_point1_pwm.dev_attr.attr,
1482 &sensor_dev_attr_pwm2_auto_point2_pwm.dev_attr.attr,
1483 &sensor_dev_attr_pwm2_auto_point3_pwm.dev_attr.attr,
1484 &sensor_dev_attr_pwm2_auto_point4_pwm.dev_attr.attr,
1485 &sensor_dev_attr_pwm2_auto_point1_temp.dev_attr.attr,
1486 &sensor_dev_attr_pwm2_auto_point1_temp_hyst.dev_attr.attr,
1487 &sensor_dev_attr_pwm2_auto_point2_temp.dev_attr.attr,
1488 &sensor_dev_attr_pwm2_auto_point3_temp.dev_attr.attr,
1489 &sensor_dev_attr_pwm2_auto_point4_temp.dev_attr.attr,
1490 NULL
1491 }, {
1492 &sensor_dev_attr_pwm3_auto_point1_pwm.dev_attr.attr,
1493 &sensor_dev_attr_pwm3_auto_point2_pwm.dev_attr.attr,
1494 &sensor_dev_attr_pwm3_auto_point3_pwm.dev_attr.attr,
1495 &sensor_dev_attr_pwm3_auto_point4_pwm.dev_attr.attr,
1496 &sensor_dev_attr_pwm3_auto_point1_temp.dev_attr.attr,
1497 &sensor_dev_attr_pwm3_auto_point1_temp_hyst.dev_attr.attr,
1498 &sensor_dev_attr_pwm3_auto_point2_temp.dev_attr.attr,
1499 &sensor_dev_attr_pwm3_auto_point3_temp.dev_attr.attr,
1500 &sensor_dev_attr_pwm3_auto_point4_temp.dev_attr.attr,
1501 NULL
1502 } };
1503
1504 static const struct attribute_group it87_group_autopwm[3] = {
1505 { .attrs = it87_attributes_autopwm[0] },
1506 { .attrs = it87_attributes_autopwm[1] },
1507 { .attrs = it87_attributes_autopwm[2] },
1508 };
1509
1510 static struct attribute *it87_attributes_fan_beep[] = {
1511 &sensor_dev_attr_fan1_beep.dev_attr.attr,
1512 &sensor_dev_attr_fan2_beep.dev_attr.attr,
1513 &sensor_dev_attr_fan3_beep.dev_attr.attr,
1514 &sensor_dev_attr_fan4_beep.dev_attr.attr,
1515 &sensor_dev_attr_fan5_beep.dev_attr.attr,
1516 };
1517
1518 static struct attribute *it87_attributes_vid[] = {
1519 &dev_attr_vrm.attr,
1520 &dev_attr_cpu0_vid.attr,
1521 NULL
1522 };
1523
1524 static const struct attribute_group it87_group_vid = {
1525 .attrs = it87_attributes_vid,
1526 };
1527
1528 static struct attribute *it87_attributes_label[] = {
1529 &sensor_dev_attr_in3_label.dev_attr.attr,
1530 &sensor_dev_attr_in7_label.dev_attr.attr,
1531 &sensor_dev_attr_in8_label.dev_attr.attr,
1532 NULL
1533 };
1534
1535 static const struct attribute_group it87_group_label = {
1536 .attrs = it87_attributes_vid,
1537 };
1538
1539 /* SuperIO detection - will change isa_address if a chip is found */
1540 static int __init it87_find(unsigned short *address,
1541 struct it87_sio_data *sio_data)
1542 {
1543 int err = -ENODEV;
1544 u16 chip_type;
1545 const char *board_vendor, *board_name;
1546
1547 superio_enter();
1548 chip_type = force_id ? force_id : superio_inw(DEVID);
1549
1550 switch (chip_type) {
1551 case IT8705F_DEVID:
1552 sio_data->type = it87;
1553 break;
1554 case IT8712F_DEVID:
1555 sio_data->type = it8712;
1556 break;
1557 case IT8716F_DEVID:
1558 case IT8726F_DEVID:
1559 sio_data->type = it8716;
1560 break;
1561 case IT8718F_DEVID:
1562 sio_data->type = it8718;
1563 break;
1564 case IT8720F_DEVID:
1565 sio_data->type = it8720;
1566 break;
1567 case IT8721F_DEVID:
1568 sio_data->type = it8721;
1569 break;
1570 case 0xffff: /* No device at all */
1571 goto exit;
1572 default:
1573 pr_debug(DRVNAME ": Unsupported chip (DEVID=0x%x)\n",
1574 chip_type);
1575 goto exit;
1576 }
1577
1578 superio_select(PME);
1579 if (!(superio_inb(IT87_ACT_REG) & 0x01)) {
1580 pr_info("it87: Device not activated, skipping\n");
1581 goto exit;
1582 }
1583
1584 *address = superio_inw(IT87_BASE_REG) & ~(IT87_EXTENT - 1);
1585 if (*address == 0) {
1586 pr_info("it87: Base address not set, skipping\n");
1587 goto exit;
1588 }
1589
1590 err = 0;
1591 sio_data->revision = superio_inb(DEVREV) & 0x0f;
1592 pr_info("it87: Found IT%04xF chip at 0x%x, revision %d\n",
1593 chip_type, *address, sio_data->revision);
1594
1595 /* in8 (Vbat) is always internal */
1596 sio_data->internal = (1 << 2);
1597
1598 /* Read GPIO config and VID value from LDN 7 (GPIO) */
1599 if (sio_data->type == it87) {
1600 /* The IT8705F doesn't have VID pins at all */
1601 sio_data->skip_vid = 1;
1602
1603 /* The IT8705F has a different LD number for GPIO */
1604 superio_select(5);
1605 sio_data->beep_pin = superio_inb(IT87_SIO_BEEP_PIN_REG) & 0x3f;
1606 } else {
1607 int reg;
1608
1609 superio_select(GPIO);
1610
1611 reg = superio_inb(IT87_SIO_GPIO3_REG);
1612 if (sio_data->type == it8721) {
1613 /* The IT8721F/IT8758E doesn't have VID pins at all */
1614 sio_data->skip_vid = 1;
1615 } else {
1616 /* We need at least 4 VID pins */
1617 if (reg & 0x0f) {
1618 pr_info("it87: VID is disabled (pins used for GPIO)\n");
1619 sio_data->skip_vid = 1;
1620 }
1621 }
1622
1623 /* Check if fan3 is there or not */
1624 if (reg & (1 << 6))
1625 sio_data->skip_pwm |= (1 << 2);
1626 if (reg & (1 << 7))
1627 sio_data->skip_fan |= (1 << 2);
1628
1629 /* Check if fan2 is there or not */
1630 reg = superio_inb(IT87_SIO_GPIO5_REG);
1631 if (reg & (1 << 1))
1632 sio_data->skip_pwm |= (1 << 1);
1633 if (reg & (1 << 2))
1634 sio_data->skip_fan |= (1 << 1);
1635
1636 if ((sio_data->type == it8718 || sio_data->type == it8720)
1637 && !(sio_data->skip_vid))
1638 sio_data->vid_value = superio_inb(IT87_SIO_VID_REG);
1639
1640 reg = superio_inb(IT87_SIO_PINX2_REG);
1641 /*
1642 * The IT8720F has no VIN7 pin, so VCCH should always be
1643 * routed internally to VIN7 with an internal divider.
1644 * Curiously, there still is a configuration bit to control
1645 * this, which means it can be set incorrectly. And even
1646 * more curiously, many boards out there are improperly
1647 * configured, even though the IT8720F datasheet claims
1648 * that the internal routing of VCCH to VIN7 is the default
1649 * setting. So we force the internal routing in this case.
1650 */
1651 if (sio_data->type == it8720 && !(reg & (1 << 1))) {
1652 reg |= (1 << 1);
1653 superio_outb(IT87_SIO_PINX2_REG, reg);
1654 pr_notice("it87: Routing internal VCCH to in7\n");
1655 }
1656 if (reg & (1 << 0))
1657 sio_data->internal |= (1 << 0);
1658 if ((reg & (1 << 1)) || sio_data->type == it8721)
1659 sio_data->internal |= (1 << 1);
1660
1661 sio_data->beep_pin = superio_inb(IT87_SIO_BEEP_PIN_REG) & 0x3f;
1662 }
1663 if (sio_data->beep_pin)
1664 pr_info("it87: Beeping is supported\n");
1665
1666 /* Disable specific features based on DMI strings */
1667 board_vendor = dmi_get_system_info(DMI_BOARD_VENDOR);
1668 board_name = dmi_get_system_info(DMI_BOARD_NAME);
1669 if (board_vendor && board_name) {
1670 if (strcmp(board_vendor, "nVIDIA") == 0
1671 && strcmp(board_name, "FN68PT") == 0) {
1672 /* On the Shuttle SN68PT, FAN_CTL2 is apparently not
1673 connected to a fan, but to something else. One user
1674 has reported instant system power-off when changing
1675 the PWM2 duty cycle, so we disable it.
1676 I use the board name string as the trigger in case
1677 the same board is ever used in other systems. */
1678 pr_info("it87: Disabling pwm2 due to "
1679 "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 printk(KERN_ERR DRVNAME ": Device allocation failed\n");
2193 goto exit;
2194 }
2195
2196 err = platform_device_add_resources(pdev, &res, 1);
2197 if (err) {
2198 printk(KERN_ERR DRVNAME ": Device resource addition failed "
2199 "(%d)\n", err);
2200 goto exit_device_put;
2201 }
2202
2203 err = platform_device_add_data(pdev, sio_data,
2204 sizeof(struct it87_sio_data));
2205 if (err) {
2206 printk(KERN_ERR DRVNAME ": Platform data allocation failed\n");
2207 goto exit_device_put;
2208 }
2209
2210 err = platform_device_add(pdev);
2211 if (err) {
2212 printk(KERN_ERR DRVNAME ": Device addition failed (%d)\n",
2213 err);
2214 goto exit_device_put;
2215 }
2216
2217 return 0;
2218
2219 exit_device_put:
2220 platform_device_put(pdev);
2221 exit:
2222 return err;
2223 }
2224
2225 static int __init sm_it87_init(void)
2226 {
2227 int err;
2228 unsigned short isa_address = 0;
2229 struct it87_sio_data sio_data;
2230
2231 memset(&sio_data, 0, sizeof(struct it87_sio_data));
2232 err = it87_find(&isa_address, &sio_data);
2233 if (err)
2234 return err;
2235 err = platform_driver_register(&it87_driver);
2236 if (err)
2237 return err;
2238
2239 err = it87_device_add(isa_address, &sio_data);
2240 if (err) {
2241 platform_driver_unregister(&it87_driver);
2242 return err;
2243 }
2244
2245 return 0;
2246 }
2247
2248 static void __exit sm_it87_exit(void)
2249 {
2250 platform_device_unregister(pdev);
2251 platform_driver_unregister(&it87_driver);
2252 }
2253
2254
2255 MODULE_AUTHOR("Chris Gauthron, "
2256 "Jean Delvare <khali@linux-fr.org>");
2257 MODULE_DESCRIPTION("IT8705F/IT871xF/IT872xF hardware monitoring driver");
2258 module_param(update_vbat, bool, 0);
2259 MODULE_PARM_DESC(update_vbat, "Update vbat if set else return powerup value");
2260 module_param(fix_pwm_polarity, bool, 0);
2261 MODULE_PARM_DESC(fix_pwm_polarity,
2262 "Force PWM polarity to active high (DANGEROUS)");
2263 MODULE_LICENSE("GPL");
2264
2265 module_init(sm_it87_init);
2266 module_exit(sm_it87_exit);
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree