2 it87.c - Part of lm_sensors, Linux kernel modules for hardware
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
10 This driver supports only the Environment Controller in the IT8705F and
11 similar parts. The other devices are supported by different drivers.
13 Supports: IT8705F Super I/O chip w/LPC interface
14 IT8712F Super I/O chip w/LPC interface
15 IT8716F Super I/O chip w/LPC interface
16 IT8718F Super I/O chip w/LPC interface
17 IT8720F Super I/O chip w/LPC interface
18 IT8726F Super I/O chip w/LPC interface
19 Sis950 A clone of the IT8705F
21 Copyright (C) 2001 Chris Gauthron
22 Copyright (C) 2005-2007 Jean Delvare <khali@linux-fr.org>
24 This program is free software; you can redistribute it and/or modify
25 it under the terms of the GNU General Public License as published by
26 the Free Software Foundation; either version 2 of the License, or
27 (at your option) any later version.
29 This program is distributed in the hope that it will be useful,
30 but WITHOUT ANY WARRANTY; without even the implied warranty of
31 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
32 GNU General Public License for more details.
34 You should have received a copy of the GNU General Public License
35 along with this program; if not, write to the Free Software
36 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
39 #include <linux/module.h>
40 #include <linux/init.h>
41 #include <linux/slab.h>
42 #include <linux/jiffies.h>
43 #include <linux/platform_device.h>
44 #include <linux/hwmon.h>
45 #include <linux/hwmon-sysfs.h>
46 #include <linux/hwmon-vid.h>
47 #include <linux/err.h>
48 #include <linux/mutex.h>
49 #include <linux/sysfs.h>
50 #include <linux/string.h>
51 #include <linux/dmi.h>
52 #include <linux/acpi.h>
55 #define DRVNAME "it87"
57 enum chips { it87, it8712, it8716, it8718, it8720 };
59 static unsigned short force_id;
60 module_param(force_id, ushort, 0);
61 MODULE_PARM_DESC(force_id, "Override the detected device ID");
63 static struct platform_device *pdev;
65 #define REG 0x2e /* The register to read/write */
66 #define DEV 0x07 /* Register: Logical device select */
67 #define VAL 0x2f /* The value to read/write */
68 #define PME 0x04 /* The device with the fan registers in it */
70 /* The device with the IT8718F/IT8720F VID value in it */
73 #define DEVID 0x20 /* Register: Device ID */
74 #define DEVREV 0x22 /* Register: Device Revision */
83 static int superio_inw(int reg)
94 superio_select(int ldn)
116 /* Logical device 4 registers */
117 #define IT8712F_DEVID 0x8712
118 #define IT8705F_DEVID 0x8705
119 #define IT8716F_DEVID 0x8716
120 #define IT8718F_DEVID 0x8718
121 #define IT8720F_DEVID 0x8720
122 #define IT8726F_DEVID 0x8726
123 #define IT87_ACT_REG 0x30
124 #define IT87_BASE_REG 0x60
126 /* Logical device 7 registers (IT8712F and later) */
127 #define IT87_SIO_GPIO3_REG 0x27
128 #define IT87_SIO_GPIO5_REG 0x29
129 #define IT87_SIO_PINX2_REG 0x2c /* Pin selection */
130 #define IT87_SIO_VID_REG 0xfc /* VID value */
132 /* Update battery voltage after every reading if true */
133 static int update_vbat;
135 /* Not all BIOSes properly configure the PWM registers */
136 static int fix_pwm_polarity;
138 /* Many IT87 constants specified below */
140 /* Length of ISA address segment */
141 #define IT87_EXTENT 8
143 /* Length of ISA address segment for Environmental Controller */
144 #define IT87_EC_EXTENT 2
146 /* Offset of EC registers from ISA base address */
147 #define IT87_EC_OFFSET 5
149 /* Where are the ISA address/data registers relative to the EC base address */
150 #define IT87_ADDR_REG_OFFSET 0
151 #define IT87_DATA_REG_OFFSET 1
153 /*----- The IT87 registers -----*/
155 #define IT87_REG_CONFIG 0x00
157 #define IT87_REG_ALARM1 0x01
158 #define IT87_REG_ALARM2 0x02
159 #define IT87_REG_ALARM3 0x03
161 /* The IT8718F and IT8720F have the VID value in a different register, in
162 Super-I/O configuration space. */
163 #define IT87_REG_VID 0x0a
164 /* The IT8705F and IT8712F earlier than revision 0x08 use register 0x0b
165 for fan divisors. Later IT8712F revisions must use 16-bit tachometer
167 #define IT87_REG_FAN_DIV 0x0b
168 #define IT87_REG_FAN_16BIT 0x0c
170 /* Monitors: 9 voltage (0 to 7, battery), 3 temp (1 to 3), 3 fan (1 to 3) */
172 static const u8 IT87_REG_FAN[] = { 0x0d, 0x0e, 0x0f, 0x80, 0x82 };
173 static const u8 IT87_REG_FAN_MIN[] = { 0x10, 0x11, 0x12, 0x84, 0x86 };
174 static const u8 IT87_REG_FANX[] = { 0x18, 0x19, 0x1a, 0x81, 0x83 };
175 static const u8 IT87_REG_FANX_MIN[] = { 0x1b, 0x1c, 0x1d, 0x85, 0x87 };
176 #define IT87_REG_FAN_MAIN_CTRL 0x13
177 #define IT87_REG_FAN_CTL 0x14
178 #define IT87_REG_PWM(nr) (0x15 + (nr))
180 #define IT87_REG_VIN(nr) (0x20 + (nr))
181 #define IT87_REG_TEMP(nr) (0x29 + (nr))
183 #define IT87_REG_VIN_MAX(nr) (0x30 + (nr) * 2)
184 #define IT87_REG_VIN_MIN(nr) (0x31 + (nr) * 2)
185 #define IT87_REG_TEMP_HIGH(nr) (0x40 + (nr) * 2)
186 #define IT87_REG_TEMP_LOW(nr) (0x41 + (nr) * 2)
188 #define IT87_REG_VIN_ENABLE 0x50
189 #define IT87_REG_TEMP_ENABLE 0x51
191 #define IT87_REG_CHIPID 0x58
193 #define IN_TO_REG(val) (SENSORS_LIMIT((((val) + 8)/16),0,255))
194 #define IN_FROM_REG(val) ((val) * 16)
196 static inline u8 FAN_TO_REG(long rpm, int div)
200 rpm = SENSORS_LIMIT(rpm, 1, 1000000);
201 return SENSORS_LIMIT((1350000 + rpm * div / 2) / (rpm * div), 1,
205 static inline u16 FAN16_TO_REG(long rpm)
209 return SENSORS_LIMIT((1350000 + rpm) / (rpm * 2), 1, 0xfffe);
212 #define FAN_FROM_REG(val,div) ((val)==0?-1:(val)==255?0:1350000/((val)*(div)))
213 /* The divider is fixed to 2 in 16-bit mode */
214 #define FAN16_FROM_REG(val) ((val)==0?-1:(val)==0xffff?0:1350000/((val)*2))
216 #define TEMP_TO_REG(val) (SENSORS_LIMIT(((val)<0?(((val)-500)/1000):\
217 ((val)+500)/1000),-128,127))
218 #define TEMP_FROM_REG(val) ((val) * 1000)
220 #define PWM_TO_REG(val) ((val) >> 1)
221 #define PWM_FROM_REG(val) (((val)&0x7f) << 1)
223 static int DIV_TO_REG(int val)
226 while (answer < 7 && (val >>= 1))
230 #define DIV_FROM_REG(val) (1 << (val))
232 static const unsigned int pwm_freq[8] = {
244 struct it87_sio_data {
246 /* Values read from Super-I/O config space */
249 /* Features skipped based on config or DMI */
255 /* For each registered chip, we need to keep some data in memory.
256 The structure is dynamically allocated. */
258 struct device *hwmon_dev;
264 struct mutex update_lock;
265 char valid; /* !=0 if following fields are valid */
266 unsigned long last_updated; /* In jiffies */
268 u8 in[9]; /* Register value */
269 u8 in_max[8]; /* Register value */
270 u8 in_min[8]; /* Register value */
271 u8 has_fan; /* Bitfield, fans enabled */
272 u16 fan[5]; /* Register values, possibly combined */
273 u16 fan_min[5]; /* Register values, possibly combined */
274 s8 temp[3]; /* Register value */
275 s8 temp_high[3]; /* Register value */
276 s8 temp_low[3]; /* Register value */
277 u8 sensor; /* Register value */
278 u8 fan_div[3]; /* Register encoding, shifted right */
279 u8 vid; /* Register encoding, combined */
281 u32 alarms; /* Register encoding, combined */
282 u8 fan_main_ctrl; /* Register value */
283 u8 fan_ctl; /* Register value */
284 u8 manual_pwm_ctl[3]; /* manual PWM value set by user */
287 static inline int has_16bit_fans(const struct it87_data *data)
289 /* IT8705F Datasheet 0.4.1, 3h == Version G.
290 IT8712F Datasheet 0.9.1, section 8.3.5 indicates 8h == Version J.
291 These are the first revisions with 16bit tachometer support. */
292 return (data->type == it87 && data->revision >= 0x03)
293 || (data->type == it8712 && data->revision >= 0x08)
294 || data->type == it8716
295 || data->type == it8718
296 || data->type == it8720;
299 static int it87_probe(struct platform_device *pdev);
300 static int __devexit it87_remove(struct platform_device *pdev);
302 static int it87_read_value(struct it87_data *data, u8 reg);
303 static void it87_write_value(struct it87_data *data, u8 reg, u8 value);
304 static struct it87_data *it87_update_device(struct device *dev);
305 static int it87_check_pwm(struct device *dev);
306 static void it87_init_device(struct platform_device *pdev);
309 static struct platform_driver it87_driver = {
311 .owner = THIS_MODULE,
315 .remove = __devexit_p(it87_remove),
318 static ssize_t show_in(struct device *dev, struct device_attribute *attr,
321 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
322 int nr = sensor_attr->index;
324 struct it87_data *data = it87_update_device(dev);
325 return sprintf(buf, "%d\n", IN_FROM_REG(data->in[nr]));
328 static ssize_t show_in_min(struct device *dev, struct device_attribute *attr,
331 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
332 int nr = sensor_attr->index;
334 struct it87_data *data = it87_update_device(dev);
335 return sprintf(buf, "%d\n", IN_FROM_REG(data->in_min[nr]));
338 static ssize_t show_in_max(struct device *dev, struct device_attribute *attr,
341 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
342 int nr = sensor_attr->index;
344 struct it87_data *data = it87_update_device(dev);
345 return sprintf(buf, "%d\n", IN_FROM_REG(data->in_max[nr]));
348 static ssize_t set_in_min(struct device *dev, struct device_attribute *attr,
349 const char *buf, size_t count)
351 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
352 int nr = sensor_attr->index;
354 struct it87_data *data = dev_get_drvdata(dev);
355 unsigned long val = simple_strtoul(buf, NULL, 10);
357 mutex_lock(&data->update_lock);
358 data->in_min[nr] = IN_TO_REG(val);
359 it87_write_value(data, IT87_REG_VIN_MIN(nr),
361 mutex_unlock(&data->update_lock);
364 static ssize_t set_in_max(struct device *dev, struct device_attribute *attr,
365 const char *buf, size_t count)
367 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
368 int nr = sensor_attr->index;
370 struct it87_data *data = dev_get_drvdata(dev);
371 unsigned long val = simple_strtoul(buf, NULL, 10);
373 mutex_lock(&data->update_lock);
374 data->in_max[nr] = IN_TO_REG(val);
375 it87_write_value(data, IT87_REG_VIN_MAX(nr),
377 mutex_unlock(&data->update_lock);
381 #define show_in_offset(offset) \
382 static SENSOR_DEVICE_ATTR(in##offset##_input, S_IRUGO, \
383 show_in, NULL, offset);
385 #define limit_in_offset(offset) \
386 static SENSOR_DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \
387 show_in_min, set_in_min, offset); \
388 static SENSOR_DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \
389 show_in_max, set_in_max, offset);
410 static ssize_t show_temp(struct device *dev, struct device_attribute *attr,
413 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
414 int nr = sensor_attr->index;
416 struct it87_data *data = it87_update_device(dev);
417 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[nr]));
419 static ssize_t show_temp_max(struct device *dev, struct device_attribute *attr,
422 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
423 int nr = sensor_attr->index;
425 struct it87_data *data = it87_update_device(dev);
426 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_high[nr]));
428 static ssize_t show_temp_min(struct device *dev, struct device_attribute *attr,
431 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
432 int nr = sensor_attr->index;
434 struct it87_data *data = it87_update_device(dev);
435 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_low[nr]));
437 static ssize_t set_temp_max(struct device *dev, struct device_attribute *attr,
438 const char *buf, size_t count)
440 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
441 int nr = sensor_attr->index;
443 struct it87_data *data = dev_get_drvdata(dev);
444 int val = simple_strtol(buf, NULL, 10);
446 mutex_lock(&data->update_lock);
447 data->temp_high[nr] = TEMP_TO_REG(val);
448 it87_write_value(data, IT87_REG_TEMP_HIGH(nr), data->temp_high[nr]);
449 mutex_unlock(&data->update_lock);
452 static ssize_t set_temp_min(struct device *dev, struct device_attribute *attr,
453 const char *buf, size_t count)
455 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
456 int nr = sensor_attr->index;
458 struct it87_data *data = dev_get_drvdata(dev);
459 int val = simple_strtol(buf, NULL, 10);
461 mutex_lock(&data->update_lock);
462 data->temp_low[nr] = TEMP_TO_REG(val);
463 it87_write_value(data, IT87_REG_TEMP_LOW(nr), data->temp_low[nr]);
464 mutex_unlock(&data->update_lock);
467 #define show_temp_offset(offset) \
468 static SENSOR_DEVICE_ATTR(temp##offset##_input, S_IRUGO, \
469 show_temp, NULL, offset - 1); \
470 static SENSOR_DEVICE_ATTR(temp##offset##_max, S_IRUGO | S_IWUSR, \
471 show_temp_max, set_temp_max, offset - 1); \
472 static SENSOR_DEVICE_ATTR(temp##offset##_min, S_IRUGO | S_IWUSR, \
473 show_temp_min, set_temp_min, offset - 1);
479 static ssize_t show_sensor(struct device *dev, struct device_attribute *attr,
482 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
483 int nr = sensor_attr->index;
485 struct it87_data *data = it87_update_device(dev);
486 u8 reg = data->sensor; /* In case the value is updated while we use it */
489 return sprintf(buf, "3\n"); /* thermal diode */
491 return sprintf(buf, "4\n"); /* thermistor */
492 return sprintf(buf, "0\n"); /* disabled */
494 static ssize_t set_sensor(struct device *dev, struct device_attribute *attr,
495 const char *buf, size_t count)
497 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
498 int nr = sensor_attr->index;
500 struct it87_data *data = dev_get_drvdata(dev);
501 int val = simple_strtol(buf, NULL, 10);
503 mutex_lock(&data->update_lock);
505 data->sensor &= ~(1 << nr);
506 data->sensor &= ~(8 << nr);
507 if (val == 2) { /* backwards compatibility */
508 dev_warn(dev, "Sensor type 2 is deprecated, please use 4 "
512 /* 3 = thermal diode; 4 = thermistor; 0 = disabled */
514 data->sensor |= 1 << nr;
516 data->sensor |= 8 << nr;
518 mutex_unlock(&data->update_lock);
521 it87_write_value(data, IT87_REG_TEMP_ENABLE, data->sensor);
522 mutex_unlock(&data->update_lock);
525 #define show_sensor_offset(offset) \
526 static SENSOR_DEVICE_ATTR(temp##offset##_type, S_IRUGO | S_IWUSR, \
527 show_sensor, set_sensor, offset - 1);
529 show_sensor_offset(1);
530 show_sensor_offset(2);
531 show_sensor_offset(3);
534 static ssize_t show_fan(struct device *dev, struct device_attribute *attr,
537 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
538 int nr = sensor_attr->index;
540 struct it87_data *data = it87_update_device(dev);
541 return sprintf(buf,"%d\n", FAN_FROM_REG(data->fan[nr],
542 DIV_FROM_REG(data->fan_div[nr])));
544 static ssize_t show_fan_min(struct device *dev, struct device_attribute *attr,
547 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
548 int nr = sensor_attr->index;
550 struct it87_data *data = it87_update_device(dev);
551 return sprintf(buf,"%d\n",
552 FAN_FROM_REG(data->fan_min[nr], DIV_FROM_REG(data->fan_div[nr])));
554 static ssize_t show_fan_div(struct device *dev, struct device_attribute *attr,
557 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
558 int nr = sensor_attr->index;
560 struct it87_data *data = it87_update_device(dev);
561 return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr]));
563 static ssize_t show_pwm_enable(struct device *dev, struct device_attribute *attr,
566 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
567 int nr = sensor_attr->index;
569 struct it87_data *data = it87_update_device(dev);
570 return sprintf(buf,"%d\n", (data->fan_main_ctrl & (1 << nr)) ? 1 : 0);
572 static ssize_t show_pwm(struct device *dev, struct device_attribute *attr,
575 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
576 int nr = sensor_attr->index;
578 struct it87_data *data = it87_update_device(dev);
579 return sprintf(buf,"%d\n", data->manual_pwm_ctl[nr]);
581 static ssize_t show_pwm_freq(struct device *dev, struct device_attribute *attr,
584 struct it87_data *data = it87_update_device(dev);
585 int index = (data->fan_ctl >> 4) & 0x07;
587 return sprintf(buf, "%u\n", pwm_freq[index]);
589 static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr,
590 const char *buf, size_t count)
592 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
593 int nr = sensor_attr->index;
595 struct it87_data *data = dev_get_drvdata(dev);
596 int val = simple_strtol(buf, NULL, 10);
599 mutex_lock(&data->update_lock);
600 reg = it87_read_value(data, IT87_REG_FAN_DIV);
602 case 0: data->fan_div[nr] = reg & 0x07; break;
603 case 1: data->fan_div[nr] = (reg >> 3) & 0x07; break;
604 case 2: data->fan_div[nr] = (reg & 0x40) ? 3 : 1; break;
607 data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr]));
608 it87_write_value(data, IT87_REG_FAN_MIN[nr], data->fan_min[nr]);
609 mutex_unlock(&data->update_lock);
612 static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr,
613 const char *buf, size_t count)
615 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
616 int nr = sensor_attr->index;
618 struct it87_data *data = dev_get_drvdata(dev);
619 unsigned long val = simple_strtoul(buf, NULL, 10);
623 mutex_lock(&data->update_lock);
624 old = it87_read_value(data, IT87_REG_FAN_DIV);
626 /* Save fan min limit */
627 min = FAN_FROM_REG(data->fan_min[nr], DIV_FROM_REG(data->fan_div[nr]));
632 data->fan_div[nr] = DIV_TO_REG(val);
636 data->fan_div[nr] = 1;
638 data->fan_div[nr] = 3;
641 val |= (data->fan_div[0] & 0x07);
642 val |= (data->fan_div[1] & 0x07) << 3;
643 if (data->fan_div[2] == 3)
645 it87_write_value(data, IT87_REG_FAN_DIV, val);
647 /* Restore fan min limit */
648 data->fan_min[nr] = FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr]));
649 it87_write_value(data, IT87_REG_FAN_MIN[nr], data->fan_min[nr]);
651 mutex_unlock(&data->update_lock);
654 static ssize_t set_pwm_enable(struct device *dev,
655 struct device_attribute *attr, const char *buf, size_t count)
657 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
658 int nr = sensor_attr->index;
660 struct it87_data *data = dev_get_drvdata(dev);
661 int val = simple_strtol(buf, NULL, 10);
663 mutex_lock(&data->update_lock);
667 /* make sure the fan is on when in on/off mode */
668 tmp = it87_read_value(data, IT87_REG_FAN_CTL);
669 it87_write_value(data, IT87_REG_FAN_CTL, tmp | (1 << nr));
670 /* set on/off mode */
671 data->fan_main_ctrl &= ~(1 << nr);
672 it87_write_value(data, IT87_REG_FAN_MAIN_CTRL, data->fan_main_ctrl);
673 } else if (val == 1) {
674 /* set SmartGuardian mode */
675 data->fan_main_ctrl |= (1 << nr);
676 it87_write_value(data, IT87_REG_FAN_MAIN_CTRL, data->fan_main_ctrl);
677 /* set saved pwm value, clear FAN_CTLX PWM mode bit */
678 it87_write_value(data, IT87_REG_PWM(nr), PWM_TO_REG(data->manual_pwm_ctl[nr]));
680 mutex_unlock(&data->update_lock);
684 mutex_unlock(&data->update_lock);
687 static ssize_t set_pwm(struct device *dev, struct device_attribute *attr,
688 const char *buf, size_t count)
690 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
691 int nr = sensor_attr->index;
693 struct it87_data *data = dev_get_drvdata(dev);
694 int val = simple_strtol(buf, NULL, 10);
696 if (val < 0 || val > 255)
699 mutex_lock(&data->update_lock);
700 data->manual_pwm_ctl[nr] = val;
701 if (data->fan_main_ctrl & (1 << nr))
702 it87_write_value(data, IT87_REG_PWM(nr), PWM_TO_REG(data->manual_pwm_ctl[nr]));
703 mutex_unlock(&data->update_lock);
706 static ssize_t set_pwm_freq(struct device *dev,
707 struct device_attribute *attr, const char *buf, size_t count)
709 struct it87_data *data = dev_get_drvdata(dev);
710 unsigned long val = simple_strtoul(buf, NULL, 10);
713 /* Search for the nearest available frequency */
714 for (i = 0; i < 7; i++) {
715 if (val > (pwm_freq[i] + pwm_freq[i+1]) / 2)
719 mutex_lock(&data->update_lock);
720 data->fan_ctl = it87_read_value(data, IT87_REG_FAN_CTL) & 0x8f;
721 data->fan_ctl |= i << 4;
722 it87_write_value(data, IT87_REG_FAN_CTL, data->fan_ctl);
723 mutex_unlock(&data->update_lock);
728 #define show_fan_offset(offset) \
729 static SENSOR_DEVICE_ATTR(fan##offset##_input, S_IRUGO, \
730 show_fan, NULL, offset - 1); \
731 static SENSOR_DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \
732 show_fan_min, set_fan_min, offset - 1); \
733 static SENSOR_DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR, \
734 show_fan_div, set_fan_div, offset - 1);
740 #define show_pwm_offset(offset) \
741 static SENSOR_DEVICE_ATTR(pwm##offset##_enable, S_IRUGO | S_IWUSR, \
742 show_pwm_enable, set_pwm_enable, offset - 1); \
743 static SENSOR_DEVICE_ATTR(pwm##offset, S_IRUGO | S_IWUSR, \
744 show_pwm, set_pwm, offset - 1); \
745 static DEVICE_ATTR(pwm##offset##_freq, \
746 (offset == 1 ? S_IRUGO | S_IWUSR : S_IRUGO), \
747 show_pwm_freq, (offset == 1 ? set_pwm_freq : NULL));
753 /* A different set of callbacks for 16-bit fans */
754 static ssize_t show_fan16(struct device *dev, struct device_attribute *attr,
757 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
758 int nr = sensor_attr->index;
759 struct it87_data *data = it87_update_device(dev);
760 return sprintf(buf, "%d\n", FAN16_FROM_REG(data->fan[nr]));
763 static ssize_t show_fan16_min(struct device *dev, struct device_attribute *attr,
766 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
767 int nr = sensor_attr->index;
768 struct it87_data *data = it87_update_device(dev);
769 return sprintf(buf, "%d\n", FAN16_FROM_REG(data->fan_min[nr]));
772 static ssize_t set_fan16_min(struct device *dev, struct device_attribute *attr,
773 const char *buf, size_t count)
775 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
776 int nr = sensor_attr->index;
777 struct it87_data *data = dev_get_drvdata(dev);
778 int val = simple_strtol(buf, NULL, 10);
780 mutex_lock(&data->update_lock);
781 data->fan_min[nr] = FAN16_TO_REG(val);
782 it87_write_value(data, IT87_REG_FAN_MIN[nr],
783 data->fan_min[nr] & 0xff);
784 it87_write_value(data, IT87_REG_FANX_MIN[nr],
785 data->fan_min[nr] >> 8);
786 mutex_unlock(&data->update_lock);
790 /* We want to use the same sysfs file names as 8-bit fans, but we need
791 different variable names, so we have to use SENSOR_ATTR instead of
792 SENSOR_DEVICE_ATTR. */
793 #define show_fan16_offset(offset) \
794 static struct sensor_device_attribute sensor_dev_attr_fan##offset##_input16 \
795 = SENSOR_ATTR(fan##offset##_input, S_IRUGO, \
796 show_fan16, NULL, offset - 1); \
797 static struct sensor_device_attribute sensor_dev_attr_fan##offset##_min16 \
798 = SENSOR_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \
799 show_fan16_min, set_fan16_min, offset - 1)
801 show_fan16_offset(1);
802 show_fan16_offset(2);
803 show_fan16_offset(3);
804 show_fan16_offset(4);
805 show_fan16_offset(5);
808 static ssize_t show_alarms(struct device *dev, struct device_attribute *attr, char *buf)
810 struct it87_data *data = it87_update_device(dev);
811 return sprintf(buf, "%u\n", data->alarms);
813 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
815 static ssize_t show_alarm(struct device *dev, struct device_attribute *attr,
818 int bitnr = to_sensor_dev_attr(attr)->index;
819 struct it87_data *data = it87_update_device(dev);
820 return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1);
822 static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 8);
823 static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 9);
824 static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 10);
825 static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 11);
826 static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 12);
827 static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 13);
828 static SENSOR_DEVICE_ATTR(in6_alarm, S_IRUGO, show_alarm, NULL, 14);
829 static SENSOR_DEVICE_ATTR(in7_alarm, S_IRUGO, show_alarm, NULL, 15);
830 static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 0);
831 static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 1);
832 static SENSOR_DEVICE_ATTR(fan3_alarm, S_IRUGO, show_alarm, NULL, 2);
833 static SENSOR_DEVICE_ATTR(fan4_alarm, S_IRUGO, show_alarm, NULL, 3);
834 static SENSOR_DEVICE_ATTR(fan5_alarm, S_IRUGO, show_alarm, NULL, 6);
835 static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 16);
836 static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 17);
837 static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL, 18);
840 show_vrm_reg(struct device *dev, struct device_attribute *attr, char *buf)
842 struct it87_data *data = dev_get_drvdata(dev);
843 return sprintf(buf, "%u\n", data->vrm);
846 store_vrm_reg(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
848 struct it87_data *data = dev_get_drvdata(dev);
851 val = simple_strtoul(buf, NULL, 10);
856 static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm_reg, store_vrm_reg);
859 show_vid_reg(struct device *dev, struct device_attribute *attr, char *buf)
861 struct it87_data *data = it87_update_device(dev);
862 return sprintf(buf, "%ld\n", (long) vid_from_reg(data->vid, data->vrm));
864 static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid_reg, NULL);
866 static ssize_t show_name(struct device *dev, struct device_attribute
869 struct it87_data *data = dev_get_drvdata(dev);
870 return sprintf(buf, "%s\n", data->name);
872 static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
874 static struct attribute *it87_attributes[] = {
875 &sensor_dev_attr_in0_input.dev_attr.attr,
876 &sensor_dev_attr_in1_input.dev_attr.attr,
877 &sensor_dev_attr_in2_input.dev_attr.attr,
878 &sensor_dev_attr_in3_input.dev_attr.attr,
879 &sensor_dev_attr_in4_input.dev_attr.attr,
880 &sensor_dev_attr_in5_input.dev_attr.attr,
881 &sensor_dev_attr_in6_input.dev_attr.attr,
882 &sensor_dev_attr_in7_input.dev_attr.attr,
883 &sensor_dev_attr_in8_input.dev_attr.attr,
884 &sensor_dev_attr_in0_min.dev_attr.attr,
885 &sensor_dev_attr_in1_min.dev_attr.attr,
886 &sensor_dev_attr_in2_min.dev_attr.attr,
887 &sensor_dev_attr_in3_min.dev_attr.attr,
888 &sensor_dev_attr_in4_min.dev_attr.attr,
889 &sensor_dev_attr_in5_min.dev_attr.attr,
890 &sensor_dev_attr_in6_min.dev_attr.attr,
891 &sensor_dev_attr_in7_min.dev_attr.attr,
892 &sensor_dev_attr_in0_max.dev_attr.attr,
893 &sensor_dev_attr_in1_max.dev_attr.attr,
894 &sensor_dev_attr_in2_max.dev_attr.attr,
895 &sensor_dev_attr_in3_max.dev_attr.attr,
896 &sensor_dev_attr_in4_max.dev_attr.attr,
897 &sensor_dev_attr_in5_max.dev_attr.attr,
898 &sensor_dev_attr_in6_max.dev_attr.attr,
899 &sensor_dev_attr_in7_max.dev_attr.attr,
900 &sensor_dev_attr_in0_alarm.dev_attr.attr,
901 &sensor_dev_attr_in1_alarm.dev_attr.attr,
902 &sensor_dev_attr_in2_alarm.dev_attr.attr,
903 &sensor_dev_attr_in3_alarm.dev_attr.attr,
904 &sensor_dev_attr_in4_alarm.dev_attr.attr,
905 &sensor_dev_attr_in5_alarm.dev_attr.attr,
906 &sensor_dev_attr_in6_alarm.dev_attr.attr,
907 &sensor_dev_attr_in7_alarm.dev_attr.attr,
909 &sensor_dev_attr_temp1_input.dev_attr.attr,
910 &sensor_dev_attr_temp2_input.dev_attr.attr,
911 &sensor_dev_attr_temp3_input.dev_attr.attr,
912 &sensor_dev_attr_temp1_max.dev_attr.attr,
913 &sensor_dev_attr_temp2_max.dev_attr.attr,
914 &sensor_dev_attr_temp3_max.dev_attr.attr,
915 &sensor_dev_attr_temp1_min.dev_attr.attr,
916 &sensor_dev_attr_temp2_min.dev_attr.attr,
917 &sensor_dev_attr_temp3_min.dev_attr.attr,
918 &sensor_dev_attr_temp1_type.dev_attr.attr,
919 &sensor_dev_attr_temp2_type.dev_attr.attr,
920 &sensor_dev_attr_temp3_type.dev_attr.attr,
921 &sensor_dev_attr_temp1_alarm.dev_attr.attr,
922 &sensor_dev_attr_temp2_alarm.dev_attr.attr,
923 &sensor_dev_attr_temp3_alarm.dev_attr.attr,
925 &dev_attr_alarms.attr,
930 static const struct attribute_group it87_group = {
931 .attrs = it87_attributes,
934 static struct attribute *it87_attributes_opt[] = {
935 &sensor_dev_attr_fan1_input16.dev_attr.attr,
936 &sensor_dev_attr_fan1_min16.dev_attr.attr,
937 &sensor_dev_attr_fan2_input16.dev_attr.attr,
938 &sensor_dev_attr_fan2_min16.dev_attr.attr,
939 &sensor_dev_attr_fan3_input16.dev_attr.attr,
940 &sensor_dev_attr_fan3_min16.dev_attr.attr,
941 &sensor_dev_attr_fan4_input16.dev_attr.attr,
942 &sensor_dev_attr_fan4_min16.dev_attr.attr,
943 &sensor_dev_attr_fan5_input16.dev_attr.attr,
944 &sensor_dev_attr_fan5_min16.dev_attr.attr,
946 &sensor_dev_attr_fan1_input.dev_attr.attr,
947 &sensor_dev_attr_fan1_min.dev_attr.attr,
948 &sensor_dev_attr_fan1_div.dev_attr.attr,
949 &sensor_dev_attr_fan2_input.dev_attr.attr,
950 &sensor_dev_attr_fan2_min.dev_attr.attr,
951 &sensor_dev_attr_fan2_div.dev_attr.attr,
952 &sensor_dev_attr_fan3_input.dev_attr.attr,
953 &sensor_dev_attr_fan3_min.dev_attr.attr,
954 &sensor_dev_attr_fan3_div.dev_attr.attr,
956 &sensor_dev_attr_fan1_alarm.dev_attr.attr,
957 &sensor_dev_attr_fan2_alarm.dev_attr.attr,
958 &sensor_dev_attr_fan3_alarm.dev_attr.attr,
959 &sensor_dev_attr_fan4_alarm.dev_attr.attr,
960 &sensor_dev_attr_fan5_alarm.dev_attr.attr,
962 &sensor_dev_attr_pwm1_enable.dev_attr.attr,
963 &sensor_dev_attr_pwm2_enable.dev_attr.attr,
964 &sensor_dev_attr_pwm3_enable.dev_attr.attr,
965 &sensor_dev_attr_pwm1.dev_attr.attr,
966 &sensor_dev_attr_pwm2.dev_attr.attr,
967 &sensor_dev_attr_pwm3.dev_attr.attr,
968 &dev_attr_pwm1_freq.attr,
969 &dev_attr_pwm2_freq.attr,
970 &dev_attr_pwm3_freq.attr,
973 &dev_attr_cpu0_vid.attr,
977 static const struct attribute_group it87_group_opt = {
978 .attrs = it87_attributes_opt,
981 /* SuperIO detection - will change isa_address if a chip is found */
982 static int __init it87_find(unsigned short *address,
983 struct it87_sio_data *sio_data)
987 const char *board_vendor, *board_name;
990 chip_type = force_id ? force_id : superio_inw(DEVID);
994 sio_data->type = it87;
997 sio_data->type = it8712;
1001 sio_data->type = it8716;
1004 sio_data->type = it8718;
1007 sio_data->type = it8720;
1009 case 0xffff: /* No device at all */
1012 pr_debug(DRVNAME ": Unsupported chip (DEVID=0x%x)\n",
1017 superio_select(PME);
1018 if (!(superio_inb(IT87_ACT_REG) & 0x01)) {
1019 pr_info("it87: Device not activated, skipping\n");
1023 *address = superio_inw(IT87_BASE_REG) & ~(IT87_EXTENT - 1);
1024 if (*address == 0) {
1025 pr_info("it87: Base address not set, skipping\n");
1030 sio_data->revision = superio_inb(DEVREV) & 0x0f;
1031 pr_info("it87: Found IT%04xF chip at 0x%x, revision %d\n",
1032 chip_type, *address, sio_data->revision);
1034 /* Read GPIO config and VID value from LDN 7 (GPIO) */
1035 if (sio_data->type == it87) {
1036 /* The IT8705F doesn't have VID pins at all */
1037 sio_data->skip_vid = 1;
1041 superio_select(GPIO);
1042 /* We need at least 4 VID pins */
1043 reg = superio_inb(IT87_SIO_GPIO3_REG);
1045 pr_info("it87: VID is disabled (pins used for GPIO)\n");
1046 sio_data->skip_vid = 1;
1049 /* Check if fan3 is there or not */
1051 sio_data->skip_pwm |= (1 << 2);
1053 sio_data->skip_fan |= (1 << 2);
1055 /* Check if fan2 is there or not */
1056 reg = superio_inb(IT87_SIO_GPIO5_REG);
1058 sio_data->skip_pwm |= (1 << 1);
1060 sio_data->skip_fan |= (1 << 1);
1062 if ((sio_data->type == it8718 || sio_data->type == it8720)
1063 && !(sio_data->skip_vid))
1064 sio_data->vid_value = superio_inb(IT87_SIO_VID_REG);
1066 reg = superio_inb(IT87_SIO_PINX2_REG);
1068 pr_info("it87: in3 is VCC (+5V)\n");
1070 pr_info("it87: in7 is VCCH (+5V Stand-By)\n");
1073 /* Disable specific features based on DMI strings */
1074 board_vendor = dmi_get_system_info(DMI_BOARD_VENDOR);
1075 board_name = dmi_get_system_info(DMI_BOARD_NAME);
1076 if (board_vendor && board_name) {
1077 if (strcmp(board_vendor, "nVIDIA") == 0
1078 && strcmp(board_name, "FN68PT") == 0) {
1079 /* On the Shuttle SN68PT, FAN_CTL2 is apparently not
1080 connected to a fan, but to something else. One user
1081 has reported instant system power-off when changing
1082 the PWM2 duty cycle, so we disable it.
1083 I use the board name string as the trigger in case
1084 the same board is ever used in other systems. */
1085 pr_info("it87: Disabling pwm2 due to "
1086 "hardware constraints\n");
1087 sio_data->skip_pwm = (1 << 1);
1096 static int __devinit it87_probe(struct platform_device *pdev)
1098 struct it87_data *data;
1099 struct resource *res;
1100 struct device *dev = &pdev->dev;
1101 struct it87_sio_data *sio_data = dev->platform_data;
1103 int enable_pwm_interface;
1104 static const char *names[] = {
1112 res = platform_get_resource(pdev, IORESOURCE_IO, 0);
1113 if (!request_region(res->start, IT87_EC_EXTENT, DRVNAME)) {
1114 dev_err(dev, "Failed to request region 0x%lx-0x%lx\n",
1115 (unsigned long)res->start,
1116 (unsigned long)(res->start + IT87_EC_EXTENT - 1));
1121 if (!(data = kzalloc(sizeof(struct it87_data), GFP_KERNEL))) {
1126 data->addr = res->start;
1127 data->type = sio_data->type;
1128 data->revision = sio_data->revision;
1129 data->name = names[sio_data->type];
1131 /* Now, we do the remaining detection. */
1132 if ((it87_read_value(data, IT87_REG_CONFIG) & 0x80)
1133 || it87_read_value(data, IT87_REG_CHIPID) != 0x90) {
1138 platform_set_drvdata(pdev, data);
1140 mutex_init(&data->update_lock);
1142 /* Check PWM configuration */
1143 enable_pwm_interface = it87_check_pwm(dev);
1145 /* Initialize the IT87 chip */
1146 it87_init_device(pdev);
1148 /* Register sysfs hooks */
1149 if ((err = sysfs_create_group(&dev->kobj, &it87_group)))
1152 /* Do not create fan files for disabled fans */
1153 if (has_16bit_fans(data)) {
1154 /* 16-bit tachometers */
1155 if (data->has_fan & (1 << 0)) {
1156 if ((err = device_create_file(dev,
1157 &sensor_dev_attr_fan1_input16.dev_attr))
1158 || (err = device_create_file(dev,
1159 &sensor_dev_attr_fan1_min16.dev_attr))
1160 || (err = device_create_file(dev,
1161 &sensor_dev_attr_fan1_alarm.dev_attr)))
1164 if (data->has_fan & (1 << 1)) {
1165 if ((err = device_create_file(dev,
1166 &sensor_dev_attr_fan2_input16.dev_attr))
1167 || (err = device_create_file(dev,
1168 &sensor_dev_attr_fan2_min16.dev_attr))
1169 || (err = device_create_file(dev,
1170 &sensor_dev_attr_fan2_alarm.dev_attr)))
1173 if (data->has_fan & (1 << 2)) {
1174 if ((err = device_create_file(dev,
1175 &sensor_dev_attr_fan3_input16.dev_attr))
1176 || (err = device_create_file(dev,
1177 &sensor_dev_attr_fan3_min16.dev_attr))
1178 || (err = device_create_file(dev,
1179 &sensor_dev_attr_fan3_alarm.dev_attr)))
1182 if (data->has_fan & (1 << 3)) {
1183 if ((err = device_create_file(dev,
1184 &sensor_dev_attr_fan4_input16.dev_attr))
1185 || (err = device_create_file(dev,
1186 &sensor_dev_attr_fan4_min16.dev_attr))
1187 || (err = device_create_file(dev,
1188 &sensor_dev_attr_fan4_alarm.dev_attr)))
1191 if (data->has_fan & (1 << 4)) {
1192 if ((err = device_create_file(dev,
1193 &sensor_dev_attr_fan5_input16.dev_attr))
1194 || (err = device_create_file(dev,
1195 &sensor_dev_attr_fan5_min16.dev_attr))
1196 || (err = device_create_file(dev,
1197 &sensor_dev_attr_fan5_alarm.dev_attr)))
1201 /* 8-bit tachometers with clock divider */
1202 if (data->has_fan & (1 << 0)) {
1203 if ((err = device_create_file(dev,
1204 &sensor_dev_attr_fan1_input.dev_attr))
1205 || (err = device_create_file(dev,
1206 &sensor_dev_attr_fan1_min.dev_attr))
1207 || (err = device_create_file(dev,
1208 &sensor_dev_attr_fan1_div.dev_attr))
1209 || (err = device_create_file(dev,
1210 &sensor_dev_attr_fan1_alarm.dev_attr)))
1213 if (data->has_fan & (1 << 1)) {
1214 if ((err = device_create_file(dev,
1215 &sensor_dev_attr_fan2_input.dev_attr))
1216 || (err = device_create_file(dev,
1217 &sensor_dev_attr_fan2_min.dev_attr))
1218 || (err = device_create_file(dev,
1219 &sensor_dev_attr_fan2_div.dev_attr))
1220 || (err = device_create_file(dev,
1221 &sensor_dev_attr_fan2_alarm.dev_attr)))
1224 if (data->has_fan & (1 << 2)) {
1225 if ((err = device_create_file(dev,
1226 &sensor_dev_attr_fan3_input.dev_attr))
1227 || (err = device_create_file(dev,
1228 &sensor_dev_attr_fan3_min.dev_attr))
1229 || (err = device_create_file(dev,
1230 &sensor_dev_attr_fan3_div.dev_attr))
1231 || (err = device_create_file(dev,
1232 &sensor_dev_attr_fan3_alarm.dev_attr)))
1237 if (enable_pwm_interface) {
1238 if (!(sio_data->skip_pwm & (1 << 0))) {
1239 if ((err = device_create_file(dev,
1240 &sensor_dev_attr_pwm1_enable.dev_attr))
1241 || (err = device_create_file(dev,
1242 &sensor_dev_attr_pwm1.dev_attr))
1243 || (err = device_create_file(dev,
1244 &dev_attr_pwm1_freq)))
1247 if (!(sio_data->skip_pwm & (1 << 1))) {
1248 if ((err = device_create_file(dev,
1249 &sensor_dev_attr_pwm2_enable.dev_attr))
1250 || (err = device_create_file(dev,
1251 &sensor_dev_attr_pwm2.dev_attr))
1252 || (err = device_create_file(dev,
1253 &dev_attr_pwm2_freq)))
1256 if (!(sio_data->skip_pwm & (1 << 2))) {
1257 if ((err = device_create_file(dev,
1258 &sensor_dev_attr_pwm3_enable.dev_attr))
1259 || (err = device_create_file(dev,
1260 &sensor_dev_attr_pwm3.dev_attr))
1261 || (err = device_create_file(dev,
1262 &dev_attr_pwm3_freq)))
1267 if (!sio_data->skip_vid) {
1268 data->vrm = vid_which_vrm();
1269 /* VID reading from Super-I/O config space if available */
1270 data->vid = sio_data->vid_value;
1271 if ((err = device_create_file(dev,
1273 || (err = device_create_file(dev,
1274 &dev_attr_cpu0_vid)))
1278 data->hwmon_dev = hwmon_device_register(dev);
1279 if (IS_ERR(data->hwmon_dev)) {
1280 err = PTR_ERR(data->hwmon_dev);
1287 sysfs_remove_group(&dev->kobj, &it87_group);
1288 sysfs_remove_group(&dev->kobj, &it87_group_opt);
1290 platform_set_drvdata(pdev, NULL);
1293 release_region(res->start, IT87_EC_EXTENT);
1298 static int __devexit it87_remove(struct platform_device *pdev)
1300 struct it87_data *data = platform_get_drvdata(pdev);
1302 hwmon_device_unregister(data->hwmon_dev);
1303 sysfs_remove_group(&pdev->dev.kobj, &it87_group);
1304 sysfs_remove_group(&pdev->dev.kobj, &it87_group_opt);
1306 release_region(data->addr, IT87_EC_EXTENT);
1307 platform_set_drvdata(pdev, NULL);
1313 /* Must be called with data->update_lock held, except during initialization.
1314 We ignore the IT87 BUSY flag at this moment - it could lead to deadlocks,
1315 would slow down the IT87 access and should not be necessary. */
1316 static int it87_read_value(struct it87_data *data, u8 reg)
1318 outb_p(reg, data->addr + IT87_ADDR_REG_OFFSET);
1319 return inb_p(data->addr + IT87_DATA_REG_OFFSET);
1322 /* Must be called with data->update_lock held, except during initialization.
1323 We ignore the IT87 BUSY flag at this moment - it could lead to deadlocks,
1324 would slow down the IT87 access and should not be necessary. */
1325 static void it87_write_value(struct it87_data *data, u8 reg, u8 value)
1327 outb_p(reg, data->addr + IT87_ADDR_REG_OFFSET);
1328 outb_p(value, data->addr + IT87_DATA_REG_OFFSET);
1331 /* Return 1 if and only if the PWM interface is safe to use */
1332 static int __devinit it87_check_pwm(struct device *dev)
1334 struct it87_data *data = dev_get_drvdata(dev);
1335 /* Some BIOSes fail to correctly configure the IT87 fans. All fans off
1336 * and polarity set to active low is sign that this is the case so we
1337 * disable pwm control to protect the user. */
1338 int tmp = it87_read_value(data, IT87_REG_FAN_CTL);
1339 if ((tmp & 0x87) == 0) {
1340 if (fix_pwm_polarity) {
1341 /* The user asks us to attempt a chip reconfiguration.
1342 * This means switching to active high polarity and
1343 * inverting all fan speed values. */
1347 for (i = 0; i < 3; i++)
1348 pwm[i] = it87_read_value(data,
1351 /* If any fan is in automatic pwm mode, the polarity
1352 * might be correct, as suspicious as it seems, so we
1353 * better don't change anything (but still disable the
1354 * PWM interface). */
1355 if (!((pwm[0] | pwm[1] | pwm[2]) & 0x80)) {
1356 dev_info(dev, "Reconfiguring PWM to "
1357 "active high polarity\n");
1358 it87_write_value(data, IT87_REG_FAN_CTL,
1360 for (i = 0; i < 3; i++)
1361 it87_write_value(data,
1367 dev_info(dev, "PWM configuration is "
1368 "too broken to be fixed\n");
1371 dev_info(dev, "Detected broken BIOS "
1372 "defaults, disabling PWM interface\n");
1374 } else if (fix_pwm_polarity) {
1375 dev_info(dev, "PWM configuration looks "
1376 "sane, won't touch\n");
1382 /* Called when we have found a new IT87. */
1383 static void __devinit it87_init_device(struct platform_device *pdev)
1385 struct it87_sio_data *sio_data = pdev->dev.platform_data;
1386 struct it87_data *data = platform_get_drvdata(pdev);
1390 /* initialize to sane defaults:
1391 * - if the chip is in manual pwm mode, this will be overwritten with
1392 * the actual settings on the chip (so in this case, initialization
1394 * - if in automatic or on/off mode, we could switch to manual mode,
1395 * read the registers and set manual_pwm_ctl accordingly, but currently
1396 * this is not implemented, so we initialize to something sane */
1397 for (i = 0; i < 3; i++) {
1398 data->manual_pwm_ctl[i] = 0xff;
1401 /* Some chips seem to have default value 0xff for all limit
1402 * registers. For low voltage limits it makes no sense and triggers
1403 * alarms, so change to 0 instead. For high temperature limits, it
1404 * means -1 degree C, which surprisingly doesn't trigger an alarm,
1405 * but is still confusing, so change to 127 degrees C. */
1406 for (i = 0; i < 8; i++) {
1407 tmp = it87_read_value(data, IT87_REG_VIN_MIN(i));
1409 it87_write_value(data, IT87_REG_VIN_MIN(i), 0);
1411 for (i = 0; i < 3; i++) {
1412 tmp = it87_read_value(data, IT87_REG_TEMP_HIGH(i));
1414 it87_write_value(data, IT87_REG_TEMP_HIGH(i), 127);
1417 /* Check if temperature channels are reset manually or by some reason */
1418 tmp = it87_read_value(data, IT87_REG_TEMP_ENABLE);
1419 if ((tmp & 0x3f) == 0) {
1420 /* Temp1,Temp3=thermistor; Temp2=thermal diode */
1421 tmp = (tmp & 0xc0) | 0x2a;
1422 it87_write_value(data, IT87_REG_TEMP_ENABLE, tmp);
1426 /* Check if voltage monitors are reset manually or by some reason */
1427 tmp = it87_read_value(data, IT87_REG_VIN_ENABLE);
1428 if ((tmp & 0xff) == 0) {
1429 /* Enable all voltage monitors */
1430 it87_write_value(data, IT87_REG_VIN_ENABLE, 0xff);
1433 /* Check if tachometers are reset manually or by some reason */
1434 mask = 0x70 & ~(sio_data->skip_fan << 4);
1435 data->fan_main_ctrl = it87_read_value(data, IT87_REG_FAN_MAIN_CTRL);
1436 if ((data->fan_main_ctrl & mask) == 0) {
1437 /* Enable all fan tachometers */
1438 data->fan_main_ctrl |= mask;
1439 it87_write_value(data, IT87_REG_FAN_MAIN_CTRL, data->fan_main_ctrl);
1441 data->has_fan = (data->fan_main_ctrl >> 4) & 0x07;
1443 /* Set tachometers to 16-bit mode if needed */
1444 if (has_16bit_fans(data)) {
1445 tmp = it87_read_value(data, IT87_REG_FAN_16BIT);
1446 if (~tmp & 0x07 & data->has_fan) {
1448 "Setting fan1-3 to 16-bit mode\n");
1449 it87_write_value(data, IT87_REG_FAN_16BIT,
1452 /* IT8705F only supports three fans. */
1453 if (data->type != it87) {
1455 data->has_fan |= (1 << 3); /* fan4 enabled */
1457 data->has_fan |= (1 << 4); /* fan5 enabled */
1461 /* Fan input pins may be used for alternative functions */
1462 data->has_fan &= ~sio_data->skip_fan;
1464 /* Set current fan mode registers and the default settings for the
1465 * other mode registers */
1466 for (i = 0; i < 3; i++) {
1467 if (data->fan_main_ctrl & (1 << i)) {
1469 tmp = it87_read_value(data, IT87_REG_PWM(i));
1471 /* automatic pwm - not yet implemented, but
1472 * leave the settings made by the BIOS alone
1473 * until a change is requested via the sysfs
1477 data->manual_pwm_ctl[i] = PWM_FROM_REG(tmp);
1482 /* Start monitoring */
1483 it87_write_value(data, IT87_REG_CONFIG,
1484 (it87_read_value(data, IT87_REG_CONFIG) & 0x36)
1485 | (update_vbat ? 0x41 : 0x01));
1488 static struct it87_data *it87_update_device(struct device *dev)
1490 struct it87_data *data = dev_get_drvdata(dev);
1493 mutex_lock(&data->update_lock);
1495 if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
1499 /* Cleared after each update, so reenable. Value
1500 returned by this read will be previous value */
1501 it87_write_value(data, IT87_REG_CONFIG,
1502 it87_read_value(data, IT87_REG_CONFIG) | 0x40);
1504 for (i = 0; i <= 7; i++) {
1506 it87_read_value(data, IT87_REG_VIN(i));
1508 it87_read_value(data, IT87_REG_VIN_MIN(i));
1510 it87_read_value(data, IT87_REG_VIN_MAX(i));
1512 /* in8 (battery) has no limit registers */
1514 it87_read_value(data, IT87_REG_VIN(8));
1516 for (i = 0; i < 5; i++) {
1517 /* Skip disabled fans */
1518 if (!(data->has_fan & (1 << i)))
1522 it87_read_value(data, IT87_REG_FAN_MIN[i]);
1523 data->fan[i] = it87_read_value(data,
1525 /* Add high byte if in 16-bit mode */
1526 if (has_16bit_fans(data)) {
1527 data->fan[i] |= it87_read_value(data,
1528 IT87_REG_FANX[i]) << 8;
1529 data->fan_min[i] |= it87_read_value(data,
1530 IT87_REG_FANX_MIN[i]) << 8;
1533 for (i = 0; i < 3; i++) {
1535 it87_read_value(data, IT87_REG_TEMP(i));
1536 data->temp_high[i] =
1537 it87_read_value(data, IT87_REG_TEMP_HIGH(i));
1539 it87_read_value(data, IT87_REG_TEMP_LOW(i));
1542 /* Newer chips don't have clock dividers */
1543 if ((data->has_fan & 0x07) && !has_16bit_fans(data)) {
1544 i = it87_read_value(data, IT87_REG_FAN_DIV);
1545 data->fan_div[0] = i & 0x07;
1546 data->fan_div[1] = (i >> 3) & 0x07;
1547 data->fan_div[2] = (i & 0x40) ? 3 : 1;
1551 it87_read_value(data, IT87_REG_ALARM1) |
1552 (it87_read_value(data, IT87_REG_ALARM2) << 8) |
1553 (it87_read_value(data, IT87_REG_ALARM3) << 16);
1554 data->fan_main_ctrl = it87_read_value(data,
1555 IT87_REG_FAN_MAIN_CTRL);
1556 data->fan_ctl = it87_read_value(data, IT87_REG_FAN_CTL);
1558 data->sensor = it87_read_value(data, IT87_REG_TEMP_ENABLE);
1559 /* The 8705 does not have VID capability.
1560 The 8718 and the 8720 don't use IT87_REG_VID for the
1562 if (data->type == it8712 || data->type == it8716) {
1563 data->vid = it87_read_value(data, IT87_REG_VID);
1564 /* The older IT8712F revisions had only 5 VID pins,
1565 but we assume it is always safe to read 6 bits. */
1568 data->last_updated = jiffies;
1572 mutex_unlock(&data->update_lock);
1577 static int __init it87_device_add(unsigned short address,
1578 const struct it87_sio_data *sio_data)
1580 struct resource res = {
1581 .start = address + IT87_EC_OFFSET,
1582 .end = address + IT87_EC_OFFSET + IT87_EC_EXTENT - 1,
1584 .flags = IORESOURCE_IO,
1588 err = acpi_check_resource_conflict(&res);
1592 pdev = platform_device_alloc(DRVNAME, address);
1595 printk(KERN_ERR DRVNAME ": Device allocation failed\n");
1599 err = platform_device_add_resources(pdev, &res, 1);
1601 printk(KERN_ERR DRVNAME ": Device resource addition failed "
1603 goto exit_device_put;
1606 err = platform_device_add_data(pdev, sio_data,
1607 sizeof(struct it87_sio_data));
1609 printk(KERN_ERR DRVNAME ": Platform data allocation failed\n");
1610 goto exit_device_put;
1613 err = platform_device_add(pdev);
1615 printk(KERN_ERR DRVNAME ": Device addition failed (%d)\n",
1617 goto exit_device_put;
1623 platform_device_put(pdev);
1628 static int __init sm_it87_init(void)
1631 unsigned short isa_address=0;
1632 struct it87_sio_data sio_data;
1634 memset(&sio_data, 0, sizeof(struct it87_sio_data));
1635 err = it87_find(&isa_address, &sio_data);
1638 err = platform_driver_register(&it87_driver);
1642 err = it87_device_add(isa_address, &sio_data);
1644 platform_driver_unregister(&it87_driver);
1651 static void __exit sm_it87_exit(void)
1653 platform_device_unregister(pdev);
1654 platform_driver_unregister(&it87_driver);
1658 MODULE_AUTHOR("Chris Gauthron, "
1659 "Jean Delvare <khali@linux-fr.org>");
1660 MODULE_DESCRIPTION("IT8705F/8712F/8716F/8718F/8720F/8726F, SiS950 driver");
1661 module_param(update_vbat, bool, 0);
1662 MODULE_PARM_DESC(update_vbat, "Update vbat if set else return powerup value");
1663 module_param(fix_pwm_polarity, bool, 0);
1664 MODULE_PARM_DESC(fix_pwm_polarity, "Force PWM polarity to active high (DANGEROUS)");
1665 MODULE_LICENSE("GPL");
1667 module_init(sm_it87_init);
1668 module_exit(sm_it87_exit);