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 IT8726F Super I/O chip w/LPC interface
18 Sis950 A clone of the IT8705F
20 Copyright (C) 2001 Chris Gauthron <chrisg@0-in.com>
21 Copyright (C) 2005-2006 Jean Delvare <khali@linux-fr.org>
23 This program is free software; you can redistribute it and/or modify
24 it under the terms of the GNU General Public License as published by
25 the Free Software Foundation; either version 2 of the License, or
26 (at your option) any later version.
28 This program is distributed in the hope that it will be useful,
29 but WITHOUT ANY WARRANTY; without even the implied warranty of
30 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
31 GNU General Public License for more details.
33 You should have received a copy of the GNU General Public License
34 along with this program; if not, write to the Free Software
35 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
38 #include <linux/module.h>
39 #include <linux/init.h>
40 #include <linux/slab.h>
41 #include <linux/jiffies.h>
42 #include <linux/platform_device.h>
43 #include <linux/hwmon.h>
44 #include <linux/hwmon-sysfs.h>
45 #include <linux/hwmon-vid.h>
46 #include <linux/err.h>
47 #include <linux/mutex.h>
48 #include <linux/sysfs.h>
51 #define DRVNAME "it87"
53 enum chips { it87, it8712, it8716, it8718 };
55 static struct platform_device *pdev;
57 #define REG 0x2e /* The register to read/write */
58 #define DEV 0x07 /* Register: Logical device select */
59 #define VAL 0x2f /* The value to read/write */
60 #define PME 0x04 /* The device with the fan registers in it */
61 #define GPIO 0x07 /* The device with the IT8718F VID value in it */
62 #define DEVID 0x20 /* Register: Device ID */
63 #define DEVREV 0x22 /* Register: Device Revision */
72 static int superio_inw(int reg)
83 superio_select(int ldn)
105 /* Logical device 4 registers */
106 #define IT8712F_DEVID 0x8712
107 #define IT8705F_DEVID 0x8705
108 #define IT8716F_DEVID 0x8716
109 #define IT8718F_DEVID 0x8718
110 #define IT8726F_DEVID 0x8726
111 #define IT87_ACT_REG 0x30
112 #define IT87_BASE_REG 0x60
114 /* Logical device 7 registers (IT8712F and later) */
115 #define IT87_SIO_PINX2_REG 0x2c /* Pin selection */
116 #define IT87_SIO_VID_REG 0xfc /* VID value */
118 /* Update battery voltage after every reading if true */
119 static int update_vbat;
121 /* Not all BIOSes properly configure the PWM registers */
122 static int fix_pwm_polarity;
124 /* Many IT87 constants specified below */
126 /* Length of ISA address segment */
127 #define IT87_EXTENT 8
129 /* Length of ISA address segment for Environmental Controller */
130 #define IT87_EC_EXTENT 2
132 /* Offset of EC registers from ISA base address */
133 #define IT87_EC_OFFSET 5
135 /* Where are the ISA address/data registers relative to the EC base address */
136 #define IT87_ADDR_REG_OFFSET 0
137 #define IT87_DATA_REG_OFFSET 1
139 /*----- The IT87 registers -----*/
141 #define IT87_REG_CONFIG 0x00
143 #define IT87_REG_ALARM1 0x01
144 #define IT87_REG_ALARM2 0x02
145 #define IT87_REG_ALARM3 0x03
147 /* The IT8718F has the VID value in a different register, in Super-I/O
148 configuration space. */
149 #define IT87_REG_VID 0x0a
150 /* Warning: register 0x0b is used for something completely different in
151 new chips/revisions. I suspect only 16-bit tachometer mode will work
153 #define IT87_REG_FAN_DIV 0x0b
154 #define IT87_REG_FAN_16BIT 0x0c
156 /* Monitors: 9 voltage (0 to 7, battery), 3 temp (1 to 3), 3 fan (1 to 3) */
158 static const u8 IT87_REG_FAN[] = { 0x0d, 0x0e, 0x0f, 0x80, 0x82 };
159 static const u8 IT87_REG_FAN_MIN[] = { 0x10, 0x11, 0x12, 0x84, 0x86 };
160 static const u8 IT87_REG_FANX[] = { 0x18, 0x19, 0x1a, 0x81, 0x83 };
161 static const u8 IT87_REG_FANX_MIN[] = { 0x1b, 0x1c, 0x1d, 0x85, 0x87 };
162 #define IT87_REG_FAN_MAIN_CTRL 0x13
163 #define IT87_REG_FAN_CTL 0x14
164 #define IT87_REG_PWM(nr) (0x15 + (nr))
166 #define IT87_REG_VIN(nr) (0x20 + (nr))
167 #define IT87_REG_TEMP(nr) (0x29 + (nr))
169 #define IT87_REG_VIN_MAX(nr) (0x30 + (nr) * 2)
170 #define IT87_REG_VIN_MIN(nr) (0x31 + (nr) * 2)
171 #define IT87_REG_TEMP_HIGH(nr) (0x40 + (nr) * 2)
172 #define IT87_REG_TEMP_LOW(nr) (0x41 + (nr) * 2)
174 #define IT87_REG_VIN_ENABLE 0x50
175 #define IT87_REG_TEMP_ENABLE 0x51
177 #define IT87_REG_CHIPID 0x58
179 #define IN_TO_REG(val) (SENSORS_LIMIT((((val) + 8)/16),0,255))
180 #define IN_FROM_REG(val) ((val) * 16)
182 static inline u8 FAN_TO_REG(long rpm, int div)
186 rpm = SENSORS_LIMIT(rpm, 1, 1000000);
187 return SENSORS_LIMIT((1350000 + rpm * div / 2) / (rpm * div), 1,
191 static inline u16 FAN16_TO_REG(long rpm)
195 return SENSORS_LIMIT((1350000 + rpm) / (rpm * 2), 1, 0xfffe);
198 #define FAN_FROM_REG(val,div) ((val)==0?-1:(val)==255?0:1350000/((val)*(div)))
199 /* The divider is fixed to 2 in 16-bit mode */
200 #define FAN16_FROM_REG(val) ((val)==0?-1:(val)==0xffff?0:1350000/((val)*2))
202 #define TEMP_TO_REG(val) (SENSORS_LIMIT(((val)<0?(((val)-500)/1000):\
203 ((val)+500)/1000),-128,127))
204 #define TEMP_FROM_REG(val) (((val)>0x80?(val)-0x100:(val))*1000)
206 #define PWM_TO_REG(val) ((val) >> 1)
207 #define PWM_FROM_REG(val) (((val)&0x7f) << 1)
209 static int DIV_TO_REG(int val)
212 while (answer < 7 && (val >>= 1))
216 #define DIV_FROM_REG(val) (1 << (val))
218 static const unsigned int pwm_freq[8] = {
230 struct it87_sio_data {
232 /* Values read from Super-I/O config space */
236 /* For each registered chip, we need to keep some data in memory.
237 The structure is dynamically allocated. */
239 struct device *hwmon_dev;
244 struct mutex update_lock;
245 char valid; /* !=0 if following fields are valid */
246 unsigned long last_updated; /* In jiffies */
248 u8 in[9]; /* Register value */
249 u8 in_max[8]; /* Register value */
250 u8 in_min[8]; /* Register value */
251 u8 has_fan; /* Bitfield, fans enabled */
252 u16 fan[5]; /* Register values, possibly combined */
253 u16 fan_min[5]; /* Register values, possibly combined */
254 u8 temp[3]; /* Register value */
255 u8 temp_high[3]; /* Register value */
256 u8 temp_low[3]; /* Register value */
257 u8 sensor; /* Register value */
258 u8 fan_div[3]; /* Register encoding, shifted right */
259 u8 vid; /* Register encoding, combined */
261 u32 alarms; /* Register encoding, combined */
262 u8 fan_main_ctrl; /* Register value */
263 u8 fan_ctl; /* Register value */
264 u8 manual_pwm_ctl[3]; /* manual PWM value set by user */
268 static int it87_probe(struct platform_device *pdev);
269 static int __devexit it87_remove(struct platform_device *pdev);
271 static int it87_read_value(struct it87_data *data, u8 reg);
272 static void it87_write_value(struct it87_data *data, u8 reg, u8 value);
273 static struct it87_data *it87_update_device(struct device *dev);
274 static int it87_check_pwm(struct device *dev);
275 static void it87_init_device(struct platform_device *pdev);
278 static struct platform_driver it87_driver = {
280 .owner = THIS_MODULE,
284 .remove = __devexit_p(it87_remove),
287 static ssize_t show_in(struct device *dev, struct device_attribute *attr,
290 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
291 int nr = sensor_attr->index;
293 struct it87_data *data = it87_update_device(dev);
294 return sprintf(buf, "%d\n", IN_FROM_REG(data->in[nr]));
297 static ssize_t show_in_min(struct device *dev, struct device_attribute *attr,
300 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
301 int nr = sensor_attr->index;
303 struct it87_data *data = it87_update_device(dev);
304 return sprintf(buf, "%d\n", IN_FROM_REG(data->in_min[nr]));
307 static ssize_t show_in_max(struct device *dev, struct device_attribute *attr,
310 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
311 int nr = sensor_attr->index;
313 struct it87_data *data = it87_update_device(dev);
314 return sprintf(buf, "%d\n", IN_FROM_REG(data->in_max[nr]));
317 static ssize_t set_in_min(struct device *dev, struct device_attribute *attr,
318 const char *buf, size_t count)
320 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
321 int nr = sensor_attr->index;
323 struct it87_data *data = dev_get_drvdata(dev);
324 unsigned long val = simple_strtoul(buf, NULL, 10);
326 mutex_lock(&data->update_lock);
327 data->in_min[nr] = IN_TO_REG(val);
328 it87_write_value(data, IT87_REG_VIN_MIN(nr),
330 mutex_unlock(&data->update_lock);
333 static ssize_t set_in_max(struct device *dev, struct device_attribute *attr,
334 const char *buf, size_t count)
336 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
337 int nr = sensor_attr->index;
339 struct it87_data *data = dev_get_drvdata(dev);
340 unsigned long val = simple_strtoul(buf, NULL, 10);
342 mutex_lock(&data->update_lock);
343 data->in_max[nr] = IN_TO_REG(val);
344 it87_write_value(data, IT87_REG_VIN_MAX(nr),
346 mutex_unlock(&data->update_lock);
350 #define show_in_offset(offset) \
351 static SENSOR_DEVICE_ATTR(in##offset##_input, S_IRUGO, \
352 show_in, NULL, offset);
354 #define limit_in_offset(offset) \
355 static SENSOR_DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \
356 show_in_min, set_in_min, offset); \
357 static SENSOR_DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \
358 show_in_max, set_in_max, offset);
379 static ssize_t show_temp(struct device *dev, struct device_attribute *attr,
382 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
383 int nr = sensor_attr->index;
385 struct it87_data *data = it87_update_device(dev);
386 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[nr]));
388 static ssize_t show_temp_max(struct device *dev, struct device_attribute *attr,
391 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
392 int nr = sensor_attr->index;
394 struct it87_data *data = it87_update_device(dev);
395 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_high[nr]));
397 static ssize_t show_temp_min(struct device *dev, struct device_attribute *attr,
400 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
401 int nr = sensor_attr->index;
403 struct it87_data *data = it87_update_device(dev);
404 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_low[nr]));
406 static ssize_t set_temp_max(struct device *dev, struct device_attribute *attr,
407 const char *buf, size_t count)
409 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
410 int nr = sensor_attr->index;
412 struct it87_data *data = dev_get_drvdata(dev);
413 int val = simple_strtol(buf, NULL, 10);
415 mutex_lock(&data->update_lock);
416 data->temp_high[nr] = TEMP_TO_REG(val);
417 it87_write_value(data, IT87_REG_TEMP_HIGH(nr), data->temp_high[nr]);
418 mutex_unlock(&data->update_lock);
421 static ssize_t set_temp_min(struct device *dev, struct device_attribute *attr,
422 const char *buf, size_t count)
424 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
425 int nr = sensor_attr->index;
427 struct it87_data *data = dev_get_drvdata(dev);
428 int val = simple_strtol(buf, NULL, 10);
430 mutex_lock(&data->update_lock);
431 data->temp_low[nr] = TEMP_TO_REG(val);
432 it87_write_value(data, IT87_REG_TEMP_LOW(nr), data->temp_low[nr]);
433 mutex_unlock(&data->update_lock);
436 #define show_temp_offset(offset) \
437 static SENSOR_DEVICE_ATTR(temp##offset##_input, S_IRUGO, \
438 show_temp, NULL, offset - 1); \
439 static SENSOR_DEVICE_ATTR(temp##offset##_max, S_IRUGO | S_IWUSR, \
440 show_temp_max, set_temp_max, offset - 1); \
441 static SENSOR_DEVICE_ATTR(temp##offset##_min, S_IRUGO | S_IWUSR, \
442 show_temp_min, set_temp_min, offset - 1);
448 static ssize_t show_sensor(struct device *dev, struct device_attribute *attr,
451 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
452 int nr = sensor_attr->index;
454 struct it87_data *data = it87_update_device(dev);
455 u8 reg = data->sensor; /* In case the value is updated while we use it */
458 return sprintf(buf, "3\n"); /* thermal diode */
460 return sprintf(buf, "2\n"); /* thermistor */
461 return sprintf(buf, "0\n"); /* disabled */
463 static ssize_t set_sensor(struct device *dev, struct device_attribute *attr,
464 const char *buf, size_t count)
466 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
467 int nr = sensor_attr->index;
469 struct it87_data *data = dev_get_drvdata(dev);
470 int val = simple_strtol(buf, NULL, 10);
472 mutex_lock(&data->update_lock);
474 data->sensor &= ~(1 << nr);
475 data->sensor &= ~(8 << nr);
476 /* 3 = thermal diode; 2 = thermistor; 0 = disabled */
478 data->sensor |= 1 << nr;
480 data->sensor |= 8 << nr;
482 mutex_unlock(&data->update_lock);
485 it87_write_value(data, IT87_REG_TEMP_ENABLE, data->sensor);
486 mutex_unlock(&data->update_lock);
489 #define show_sensor_offset(offset) \
490 static SENSOR_DEVICE_ATTR(temp##offset##_type, S_IRUGO | S_IWUSR, \
491 show_sensor, set_sensor, offset - 1);
493 show_sensor_offset(1);
494 show_sensor_offset(2);
495 show_sensor_offset(3);
498 static ssize_t show_fan(struct device *dev, struct device_attribute *attr,
501 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
502 int nr = sensor_attr->index;
504 struct it87_data *data = it87_update_device(dev);
505 return sprintf(buf,"%d\n", FAN_FROM_REG(data->fan[nr],
506 DIV_FROM_REG(data->fan_div[nr])));
508 static ssize_t show_fan_min(struct device *dev, struct device_attribute *attr,
511 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
512 int nr = sensor_attr->index;
514 struct it87_data *data = it87_update_device(dev);
515 return sprintf(buf,"%d\n",
516 FAN_FROM_REG(data->fan_min[nr], DIV_FROM_REG(data->fan_div[nr])));
518 static ssize_t show_fan_div(struct device *dev, struct device_attribute *attr,
521 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
522 int nr = sensor_attr->index;
524 struct it87_data *data = it87_update_device(dev);
525 return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr]));
527 static ssize_t show_pwm_enable(struct device *dev, struct device_attribute *attr,
530 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
531 int nr = sensor_attr->index;
533 struct it87_data *data = it87_update_device(dev);
534 return sprintf(buf,"%d\n", (data->fan_main_ctrl & (1 << nr)) ? 1 : 0);
536 static ssize_t show_pwm(struct device *dev, struct device_attribute *attr,
539 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
540 int nr = sensor_attr->index;
542 struct it87_data *data = it87_update_device(dev);
543 return sprintf(buf,"%d\n", data->manual_pwm_ctl[nr]);
545 static ssize_t show_pwm_freq(struct device *dev, struct device_attribute *attr,
548 struct it87_data *data = it87_update_device(dev);
549 int index = (data->fan_ctl >> 4) & 0x07;
551 return sprintf(buf, "%u\n", pwm_freq[index]);
553 static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr,
554 const char *buf, size_t count)
556 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
557 int nr = sensor_attr->index;
559 struct it87_data *data = dev_get_drvdata(dev);
560 int val = simple_strtol(buf, NULL, 10);
563 mutex_lock(&data->update_lock);
564 reg = it87_read_value(data, IT87_REG_FAN_DIV);
566 case 0: data->fan_div[nr] = reg & 0x07; break;
567 case 1: data->fan_div[nr] = (reg >> 3) & 0x07; break;
568 case 2: data->fan_div[nr] = (reg & 0x40) ? 3 : 1; break;
571 data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr]));
572 it87_write_value(data, IT87_REG_FAN_MIN[nr], data->fan_min[nr]);
573 mutex_unlock(&data->update_lock);
576 static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr,
577 const char *buf, size_t count)
579 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
580 int nr = sensor_attr->index;
582 struct it87_data *data = dev_get_drvdata(dev);
583 unsigned long val = simple_strtoul(buf, NULL, 10);
587 mutex_lock(&data->update_lock);
588 old = it87_read_value(data, IT87_REG_FAN_DIV);
590 /* Save fan min limit */
591 min = FAN_FROM_REG(data->fan_min[nr], DIV_FROM_REG(data->fan_div[nr]));
596 data->fan_div[nr] = DIV_TO_REG(val);
600 data->fan_div[nr] = 1;
602 data->fan_div[nr] = 3;
605 val |= (data->fan_div[0] & 0x07);
606 val |= (data->fan_div[1] & 0x07) << 3;
607 if (data->fan_div[2] == 3)
609 it87_write_value(data, IT87_REG_FAN_DIV, val);
611 /* Restore fan min limit */
612 data->fan_min[nr] = FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr]));
613 it87_write_value(data, IT87_REG_FAN_MIN[nr], data->fan_min[nr]);
615 mutex_unlock(&data->update_lock);
618 static ssize_t set_pwm_enable(struct device *dev,
619 struct device_attribute *attr, const char *buf, size_t count)
621 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
622 int nr = sensor_attr->index;
624 struct it87_data *data = dev_get_drvdata(dev);
625 int val = simple_strtol(buf, NULL, 10);
627 mutex_lock(&data->update_lock);
631 /* make sure the fan is on when in on/off mode */
632 tmp = it87_read_value(data, IT87_REG_FAN_CTL);
633 it87_write_value(data, IT87_REG_FAN_CTL, tmp | (1 << nr));
634 /* set on/off mode */
635 data->fan_main_ctrl &= ~(1 << nr);
636 it87_write_value(data, IT87_REG_FAN_MAIN_CTRL, data->fan_main_ctrl);
637 } else if (val == 1) {
638 /* set SmartGuardian mode */
639 data->fan_main_ctrl |= (1 << nr);
640 it87_write_value(data, IT87_REG_FAN_MAIN_CTRL, data->fan_main_ctrl);
641 /* set saved pwm value, clear FAN_CTLX PWM mode bit */
642 it87_write_value(data, IT87_REG_PWM(nr), PWM_TO_REG(data->manual_pwm_ctl[nr]));
644 mutex_unlock(&data->update_lock);
648 mutex_unlock(&data->update_lock);
651 static ssize_t set_pwm(struct device *dev, struct device_attribute *attr,
652 const char *buf, size_t count)
654 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
655 int nr = sensor_attr->index;
657 struct it87_data *data = dev_get_drvdata(dev);
658 int val = simple_strtol(buf, NULL, 10);
660 if (val < 0 || val > 255)
663 mutex_lock(&data->update_lock);
664 data->manual_pwm_ctl[nr] = val;
665 if (data->fan_main_ctrl & (1 << nr))
666 it87_write_value(data, IT87_REG_PWM(nr), PWM_TO_REG(data->manual_pwm_ctl[nr]));
667 mutex_unlock(&data->update_lock);
670 static ssize_t set_pwm_freq(struct device *dev,
671 struct device_attribute *attr, const char *buf, size_t count)
673 struct it87_data *data = dev_get_drvdata(dev);
674 unsigned long val = simple_strtoul(buf, NULL, 10);
677 /* Search for the nearest available frequency */
678 for (i = 0; i < 7; i++) {
679 if (val > (pwm_freq[i] + pwm_freq[i+1]) / 2)
683 mutex_lock(&data->update_lock);
684 data->fan_ctl = it87_read_value(data, IT87_REG_FAN_CTL) & 0x8f;
685 data->fan_ctl |= i << 4;
686 it87_write_value(data, IT87_REG_FAN_CTL, data->fan_ctl);
687 mutex_unlock(&data->update_lock);
692 #define show_fan_offset(offset) \
693 static SENSOR_DEVICE_ATTR(fan##offset##_input, S_IRUGO, \
694 show_fan, NULL, offset - 1); \
695 static SENSOR_DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \
696 show_fan_min, set_fan_min, offset - 1); \
697 static SENSOR_DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR, \
698 show_fan_div, set_fan_div, offset - 1);
704 #define show_pwm_offset(offset) \
705 static SENSOR_DEVICE_ATTR(pwm##offset##_enable, S_IRUGO | S_IWUSR, \
706 show_pwm_enable, set_pwm_enable, offset - 1); \
707 static SENSOR_DEVICE_ATTR(pwm##offset, S_IRUGO | S_IWUSR, \
708 show_pwm, set_pwm, offset - 1); \
709 static DEVICE_ATTR(pwm##offset##_freq, \
710 (offset == 1 ? S_IRUGO | S_IWUSR : S_IRUGO), \
711 show_pwm_freq, (offset == 1 ? set_pwm_freq : NULL));
717 /* A different set of callbacks for 16-bit fans */
718 static ssize_t show_fan16(struct device *dev, struct device_attribute *attr,
721 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
722 int nr = sensor_attr->index;
723 struct it87_data *data = it87_update_device(dev);
724 return sprintf(buf, "%d\n", FAN16_FROM_REG(data->fan[nr]));
727 static ssize_t show_fan16_min(struct device *dev, struct device_attribute *attr,
730 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
731 int nr = sensor_attr->index;
732 struct it87_data *data = it87_update_device(dev);
733 return sprintf(buf, "%d\n", FAN16_FROM_REG(data->fan_min[nr]));
736 static ssize_t set_fan16_min(struct device *dev, struct device_attribute *attr,
737 const char *buf, size_t count)
739 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
740 int nr = sensor_attr->index;
741 struct it87_data *data = dev_get_drvdata(dev);
742 int val = simple_strtol(buf, NULL, 10);
744 mutex_lock(&data->update_lock);
745 data->fan_min[nr] = FAN16_TO_REG(val);
746 it87_write_value(data, IT87_REG_FAN_MIN[nr],
747 data->fan_min[nr] & 0xff);
748 it87_write_value(data, IT87_REG_FANX_MIN[nr],
749 data->fan_min[nr] >> 8);
750 mutex_unlock(&data->update_lock);
754 /* We want to use the same sysfs file names as 8-bit fans, but we need
755 different variable names, so we have to use SENSOR_ATTR instead of
756 SENSOR_DEVICE_ATTR. */
757 #define show_fan16_offset(offset) \
758 static struct sensor_device_attribute sensor_dev_attr_fan##offset##_input16 \
759 = SENSOR_ATTR(fan##offset##_input, S_IRUGO, \
760 show_fan16, NULL, offset - 1); \
761 static struct sensor_device_attribute sensor_dev_attr_fan##offset##_min16 \
762 = SENSOR_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \
763 show_fan16_min, set_fan16_min, offset - 1)
765 show_fan16_offset(1);
766 show_fan16_offset(2);
767 show_fan16_offset(3);
768 show_fan16_offset(4);
769 show_fan16_offset(5);
772 static ssize_t show_alarms(struct device *dev, struct device_attribute *attr, char *buf)
774 struct it87_data *data = it87_update_device(dev);
775 return sprintf(buf, "%u\n", data->alarms);
777 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
780 show_vrm_reg(struct device *dev, struct device_attribute *attr, char *buf)
782 struct it87_data *data = dev_get_drvdata(dev);
783 return sprintf(buf, "%u\n", data->vrm);
786 store_vrm_reg(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
788 struct it87_data *data = dev_get_drvdata(dev);
791 val = simple_strtoul(buf, NULL, 10);
796 static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm_reg, store_vrm_reg);
799 show_vid_reg(struct device *dev, struct device_attribute *attr, char *buf)
801 struct it87_data *data = it87_update_device(dev);
802 return sprintf(buf, "%ld\n", (long) vid_from_reg(data->vid, data->vrm));
804 static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid_reg, NULL);
806 static ssize_t show_name(struct device *dev, struct device_attribute
809 struct it87_data *data = dev_get_drvdata(dev);
810 return sprintf(buf, "%s\n", data->name);
812 static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
814 static struct attribute *it87_attributes[] = {
815 &sensor_dev_attr_in0_input.dev_attr.attr,
816 &sensor_dev_attr_in1_input.dev_attr.attr,
817 &sensor_dev_attr_in2_input.dev_attr.attr,
818 &sensor_dev_attr_in3_input.dev_attr.attr,
819 &sensor_dev_attr_in4_input.dev_attr.attr,
820 &sensor_dev_attr_in5_input.dev_attr.attr,
821 &sensor_dev_attr_in6_input.dev_attr.attr,
822 &sensor_dev_attr_in7_input.dev_attr.attr,
823 &sensor_dev_attr_in8_input.dev_attr.attr,
824 &sensor_dev_attr_in0_min.dev_attr.attr,
825 &sensor_dev_attr_in1_min.dev_attr.attr,
826 &sensor_dev_attr_in2_min.dev_attr.attr,
827 &sensor_dev_attr_in3_min.dev_attr.attr,
828 &sensor_dev_attr_in4_min.dev_attr.attr,
829 &sensor_dev_attr_in5_min.dev_attr.attr,
830 &sensor_dev_attr_in6_min.dev_attr.attr,
831 &sensor_dev_attr_in7_min.dev_attr.attr,
832 &sensor_dev_attr_in0_max.dev_attr.attr,
833 &sensor_dev_attr_in1_max.dev_attr.attr,
834 &sensor_dev_attr_in2_max.dev_attr.attr,
835 &sensor_dev_attr_in3_max.dev_attr.attr,
836 &sensor_dev_attr_in4_max.dev_attr.attr,
837 &sensor_dev_attr_in5_max.dev_attr.attr,
838 &sensor_dev_attr_in6_max.dev_attr.attr,
839 &sensor_dev_attr_in7_max.dev_attr.attr,
841 &sensor_dev_attr_temp1_input.dev_attr.attr,
842 &sensor_dev_attr_temp2_input.dev_attr.attr,
843 &sensor_dev_attr_temp3_input.dev_attr.attr,
844 &sensor_dev_attr_temp1_max.dev_attr.attr,
845 &sensor_dev_attr_temp2_max.dev_attr.attr,
846 &sensor_dev_attr_temp3_max.dev_attr.attr,
847 &sensor_dev_attr_temp1_min.dev_attr.attr,
848 &sensor_dev_attr_temp2_min.dev_attr.attr,
849 &sensor_dev_attr_temp3_min.dev_attr.attr,
850 &sensor_dev_attr_temp1_type.dev_attr.attr,
851 &sensor_dev_attr_temp2_type.dev_attr.attr,
852 &sensor_dev_attr_temp3_type.dev_attr.attr,
854 &dev_attr_alarms.attr,
859 static const struct attribute_group it87_group = {
860 .attrs = it87_attributes,
863 static struct attribute *it87_attributes_opt[] = {
864 &sensor_dev_attr_fan1_input16.dev_attr.attr,
865 &sensor_dev_attr_fan1_min16.dev_attr.attr,
866 &sensor_dev_attr_fan2_input16.dev_attr.attr,
867 &sensor_dev_attr_fan2_min16.dev_attr.attr,
868 &sensor_dev_attr_fan3_input16.dev_attr.attr,
869 &sensor_dev_attr_fan3_min16.dev_attr.attr,
870 &sensor_dev_attr_fan4_input16.dev_attr.attr,
871 &sensor_dev_attr_fan4_min16.dev_attr.attr,
872 &sensor_dev_attr_fan5_input16.dev_attr.attr,
873 &sensor_dev_attr_fan5_min16.dev_attr.attr,
875 &sensor_dev_attr_fan1_input.dev_attr.attr,
876 &sensor_dev_attr_fan1_min.dev_attr.attr,
877 &sensor_dev_attr_fan1_div.dev_attr.attr,
878 &sensor_dev_attr_fan2_input.dev_attr.attr,
879 &sensor_dev_attr_fan2_min.dev_attr.attr,
880 &sensor_dev_attr_fan2_div.dev_attr.attr,
881 &sensor_dev_attr_fan3_input.dev_attr.attr,
882 &sensor_dev_attr_fan3_min.dev_attr.attr,
883 &sensor_dev_attr_fan3_div.dev_attr.attr,
885 &sensor_dev_attr_pwm1_enable.dev_attr.attr,
886 &sensor_dev_attr_pwm2_enable.dev_attr.attr,
887 &sensor_dev_attr_pwm3_enable.dev_attr.attr,
888 &sensor_dev_attr_pwm1.dev_attr.attr,
889 &sensor_dev_attr_pwm2.dev_attr.attr,
890 &sensor_dev_attr_pwm3.dev_attr.attr,
893 &dev_attr_cpu0_vid.attr,
897 static const struct attribute_group it87_group_opt = {
898 .attrs = it87_attributes_opt,
901 /* SuperIO detection - will change isa_address if a chip is found */
902 static int __init it87_find(unsigned short *address,
903 struct it87_sio_data *sio_data)
909 chip_type = superio_inw(DEVID);
913 sio_data->type = it87;
916 sio_data->type = it8712;
920 sio_data->type = it8716;
923 sio_data->type = it8718;
925 case 0xffff: /* No device at all */
928 pr_debug(DRVNAME ": Unsupported chip (DEVID=0x%x)\n",
934 if (!(superio_inb(IT87_ACT_REG) & 0x01)) {
935 pr_info("it87: Device not activated, skipping\n");
939 *address = superio_inw(IT87_BASE_REG) & ~(IT87_EXTENT - 1);
941 pr_info("it87: Base address not set, skipping\n");
946 pr_info("it87: Found IT%04xF chip at 0x%x, revision %d\n",
947 chip_type, *address, superio_inb(DEVREV) & 0x0f);
949 /* Read GPIO config and VID value from LDN 7 (GPIO) */
950 if (chip_type != IT8705F_DEVID) {
953 superio_select(GPIO);
954 if (chip_type == it8718)
955 sio_data->vid_value = superio_inb(IT87_SIO_VID_REG);
957 reg = superio_inb(IT87_SIO_PINX2_REG);
959 pr_info("it87: in3 is VCC (+5V)\n");
961 pr_info("it87: in7 is VCCH (+5V Stand-By)\n");
969 static int __devinit it87_probe(struct platform_device *pdev)
971 struct it87_data *data;
972 struct resource *res;
973 struct device *dev = &pdev->dev;
974 struct it87_sio_data *sio_data = dev->platform_data;
976 int enable_pwm_interface;
977 static const char *names[] = {
984 res = platform_get_resource(pdev, IORESOURCE_IO, 0);
985 if (!request_region(res->start, IT87_EC_EXTENT, DRVNAME)) {
986 dev_err(dev, "Failed to request region 0x%lx-0x%lx\n",
987 (unsigned long)res->start,
988 (unsigned long)(res->start + IT87_EC_EXTENT - 1));
993 if (!(data = kzalloc(sizeof(struct it87_data), GFP_KERNEL))) {
998 data->addr = res->start;
999 data->type = sio_data->type;
1000 data->name = names[sio_data->type];
1002 /* Now, we do the remaining detection. */
1003 if ((it87_read_value(data, IT87_REG_CONFIG) & 0x80)
1004 || it87_read_value(data, IT87_REG_CHIPID) != 0x90) {
1009 platform_set_drvdata(pdev, data);
1011 mutex_init(&data->update_lock);
1013 /* Check PWM configuration */
1014 enable_pwm_interface = it87_check_pwm(dev);
1016 /* Initialize the IT87 chip */
1017 it87_init_device(pdev);
1019 /* Register sysfs hooks */
1020 if ((err = sysfs_create_group(&dev->kobj, &it87_group)))
1023 /* Do not create fan files for disabled fans */
1024 if (data->type == it8716 || data->type == it8718) {
1025 /* 16-bit tachometers */
1026 if (data->has_fan & (1 << 0)) {
1027 if ((err = device_create_file(dev,
1028 &sensor_dev_attr_fan1_input16.dev_attr))
1029 || (err = device_create_file(dev,
1030 &sensor_dev_attr_fan1_min16.dev_attr)))
1033 if (data->has_fan & (1 << 1)) {
1034 if ((err = device_create_file(dev,
1035 &sensor_dev_attr_fan2_input16.dev_attr))
1036 || (err = device_create_file(dev,
1037 &sensor_dev_attr_fan2_min16.dev_attr)))
1040 if (data->has_fan & (1 << 2)) {
1041 if ((err = device_create_file(dev,
1042 &sensor_dev_attr_fan3_input16.dev_attr))
1043 || (err = device_create_file(dev,
1044 &sensor_dev_attr_fan3_min16.dev_attr)))
1047 if (data->has_fan & (1 << 3)) {
1048 if ((err = device_create_file(dev,
1049 &sensor_dev_attr_fan4_input16.dev_attr))
1050 || (err = device_create_file(dev,
1051 &sensor_dev_attr_fan4_min16.dev_attr)))
1054 if (data->has_fan & (1 << 4)) {
1055 if ((err = device_create_file(dev,
1056 &sensor_dev_attr_fan5_input16.dev_attr))
1057 || (err = device_create_file(dev,
1058 &sensor_dev_attr_fan5_min16.dev_attr)))
1062 /* 8-bit tachometers with clock divider */
1063 if (data->has_fan & (1 << 0)) {
1064 if ((err = device_create_file(dev,
1065 &sensor_dev_attr_fan1_input.dev_attr))
1066 || (err = device_create_file(dev,
1067 &sensor_dev_attr_fan1_min.dev_attr))
1068 || (err = device_create_file(dev,
1069 &sensor_dev_attr_fan1_div.dev_attr)))
1072 if (data->has_fan & (1 << 1)) {
1073 if ((err = device_create_file(dev,
1074 &sensor_dev_attr_fan2_input.dev_attr))
1075 || (err = device_create_file(dev,
1076 &sensor_dev_attr_fan2_min.dev_attr))
1077 || (err = device_create_file(dev,
1078 &sensor_dev_attr_fan2_div.dev_attr)))
1081 if (data->has_fan & (1 << 2)) {
1082 if ((err = device_create_file(dev,
1083 &sensor_dev_attr_fan3_input.dev_attr))
1084 || (err = device_create_file(dev,
1085 &sensor_dev_attr_fan3_min.dev_attr))
1086 || (err = device_create_file(dev,
1087 &sensor_dev_attr_fan3_div.dev_attr)))
1092 if (enable_pwm_interface) {
1093 if ((err = device_create_file(dev,
1094 &sensor_dev_attr_pwm1_enable.dev_attr))
1095 || (err = device_create_file(dev,
1096 &sensor_dev_attr_pwm2_enable.dev_attr))
1097 || (err = device_create_file(dev,
1098 &sensor_dev_attr_pwm3_enable.dev_attr))
1099 || (err = device_create_file(dev,
1100 &sensor_dev_attr_pwm1.dev_attr))
1101 || (err = device_create_file(dev,
1102 &sensor_dev_attr_pwm2.dev_attr))
1103 || (err = device_create_file(dev,
1104 &sensor_dev_attr_pwm3.dev_attr))
1105 || (err = device_create_file(dev,
1106 &dev_attr_pwm1_freq))
1107 || (err = device_create_file(dev,
1108 &dev_attr_pwm2_freq))
1109 || (err = device_create_file(dev,
1110 &dev_attr_pwm3_freq)))
1114 if (data->type == it8712 || data->type == it8716
1115 || data->type == it8718) {
1116 data->vrm = vid_which_vrm();
1117 /* VID reading from Super-I/O config space if available */
1118 data->vid = sio_data->vid_value;
1119 if ((err = device_create_file(dev,
1121 || (err = device_create_file(dev,
1122 &dev_attr_cpu0_vid)))
1126 data->hwmon_dev = hwmon_device_register(dev);
1127 if (IS_ERR(data->hwmon_dev)) {
1128 err = PTR_ERR(data->hwmon_dev);
1135 sysfs_remove_group(&dev->kobj, &it87_group);
1136 sysfs_remove_group(&dev->kobj, &it87_group_opt);
1138 platform_set_drvdata(pdev, NULL);
1141 release_region(res->start, IT87_EC_EXTENT);
1146 static int __devexit it87_remove(struct platform_device *pdev)
1148 struct it87_data *data = platform_get_drvdata(pdev);
1150 hwmon_device_unregister(data->hwmon_dev);
1151 sysfs_remove_group(&pdev->dev.kobj, &it87_group);
1152 sysfs_remove_group(&pdev->dev.kobj, &it87_group_opt);
1154 release_region(data->addr, IT87_EC_EXTENT);
1155 platform_set_drvdata(pdev, NULL);
1161 /* Must be called with data->update_lock held, except during initialization.
1162 We ignore the IT87 BUSY flag at this moment - it could lead to deadlocks,
1163 would slow down the IT87 access and should not be necessary. */
1164 static int it87_read_value(struct it87_data *data, u8 reg)
1166 outb_p(reg, data->addr + IT87_ADDR_REG_OFFSET);
1167 return inb_p(data->addr + IT87_DATA_REG_OFFSET);
1170 /* Must be called with data->update_lock held, except during initialization.
1171 We ignore the IT87 BUSY flag at this moment - it could lead to deadlocks,
1172 would slow down the IT87 access and should not be necessary. */
1173 static void it87_write_value(struct it87_data *data, u8 reg, u8 value)
1175 outb_p(reg, data->addr + IT87_ADDR_REG_OFFSET);
1176 outb_p(value, data->addr + IT87_DATA_REG_OFFSET);
1179 /* Return 1 if and only if the PWM interface is safe to use */
1180 static int __devinit it87_check_pwm(struct device *dev)
1182 struct it87_data *data = dev_get_drvdata(dev);
1183 /* Some BIOSes fail to correctly configure the IT87 fans. All fans off
1184 * and polarity set to active low is sign that this is the case so we
1185 * disable pwm control to protect the user. */
1186 int tmp = it87_read_value(data, IT87_REG_FAN_CTL);
1187 if ((tmp & 0x87) == 0) {
1188 if (fix_pwm_polarity) {
1189 /* The user asks us to attempt a chip reconfiguration.
1190 * This means switching to active high polarity and
1191 * inverting all fan speed values. */
1195 for (i = 0; i < 3; i++)
1196 pwm[i] = it87_read_value(data,
1199 /* If any fan is in automatic pwm mode, the polarity
1200 * might be correct, as suspicious as it seems, so we
1201 * better don't change anything (but still disable the
1202 * PWM interface). */
1203 if (!((pwm[0] | pwm[1] | pwm[2]) & 0x80)) {
1204 dev_info(dev, "Reconfiguring PWM to "
1205 "active high polarity\n");
1206 it87_write_value(data, IT87_REG_FAN_CTL,
1208 for (i = 0; i < 3; i++)
1209 it87_write_value(data,
1215 dev_info(dev, "PWM configuration is "
1216 "too broken to be fixed\n");
1219 dev_info(dev, "Detected broken BIOS "
1220 "defaults, disabling PWM interface\n");
1222 } else if (fix_pwm_polarity) {
1223 dev_info(dev, "PWM configuration looks "
1224 "sane, won't touch\n");
1230 /* Called when we have found a new IT87. */
1231 static void __devinit it87_init_device(struct platform_device *pdev)
1233 struct it87_data *data = platform_get_drvdata(pdev);
1236 /* initialize to sane defaults:
1237 * - if the chip is in manual pwm mode, this will be overwritten with
1238 * the actual settings on the chip (so in this case, initialization
1240 * - if in automatic or on/off mode, we could switch to manual mode,
1241 * read the registers and set manual_pwm_ctl accordingly, but currently
1242 * this is not implemented, so we initialize to something sane */
1243 for (i = 0; i < 3; i++) {
1244 data->manual_pwm_ctl[i] = 0xff;
1247 /* Some chips seem to have default value 0xff for all limit
1248 * registers. For low voltage limits it makes no sense and triggers
1249 * alarms, so change to 0 instead. For high temperature limits, it
1250 * means -1 degree C, which surprisingly doesn't trigger an alarm,
1251 * but is still confusing, so change to 127 degrees C. */
1252 for (i = 0; i < 8; i++) {
1253 tmp = it87_read_value(data, IT87_REG_VIN_MIN(i));
1255 it87_write_value(data, IT87_REG_VIN_MIN(i), 0);
1257 for (i = 0; i < 3; i++) {
1258 tmp = it87_read_value(data, IT87_REG_TEMP_HIGH(i));
1260 it87_write_value(data, IT87_REG_TEMP_HIGH(i), 127);
1263 /* Check if temperature channnels are reset manually or by some reason */
1264 tmp = it87_read_value(data, IT87_REG_TEMP_ENABLE);
1265 if ((tmp & 0x3f) == 0) {
1266 /* Temp1,Temp3=thermistor; Temp2=thermal diode */
1267 tmp = (tmp & 0xc0) | 0x2a;
1268 it87_write_value(data, IT87_REG_TEMP_ENABLE, tmp);
1272 /* Check if voltage monitors are reset manually or by some reason */
1273 tmp = it87_read_value(data, IT87_REG_VIN_ENABLE);
1274 if ((tmp & 0xff) == 0) {
1275 /* Enable all voltage monitors */
1276 it87_write_value(data, IT87_REG_VIN_ENABLE, 0xff);
1279 /* Check if tachometers are reset manually or by some reason */
1280 data->fan_main_ctrl = it87_read_value(data, IT87_REG_FAN_MAIN_CTRL);
1281 if ((data->fan_main_ctrl & 0x70) == 0) {
1282 /* Enable all fan tachometers */
1283 data->fan_main_ctrl |= 0x70;
1284 it87_write_value(data, IT87_REG_FAN_MAIN_CTRL, data->fan_main_ctrl);
1286 data->has_fan = (data->fan_main_ctrl >> 4) & 0x07;
1288 /* Set tachometers to 16-bit mode if needed */
1289 if (data->type == it8716 || data->type == it8718) {
1290 tmp = it87_read_value(data, IT87_REG_FAN_16BIT);
1291 if (~tmp & 0x07 & data->has_fan) {
1293 "Setting fan1-3 to 16-bit mode\n");
1294 it87_write_value(data, IT87_REG_FAN_16BIT,
1298 data->has_fan |= (1 << 3); /* fan4 enabled */
1300 data->has_fan |= (1 << 4); /* fan5 enabled */
1303 /* Set current fan mode registers and the default settings for the
1304 * other mode registers */
1305 for (i = 0; i < 3; i++) {
1306 if (data->fan_main_ctrl & (1 << i)) {
1308 tmp = it87_read_value(data, IT87_REG_PWM(i));
1310 /* automatic pwm - not yet implemented, but
1311 * leave the settings made by the BIOS alone
1312 * until a change is requested via the sysfs
1316 data->manual_pwm_ctl[i] = PWM_FROM_REG(tmp);
1321 /* Start monitoring */
1322 it87_write_value(data, IT87_REG_CONFIG,
1323 (it87_read_value(data, IT87_REG_CONFIG) & 0x36)
1324 | (update_vbat ? 0x41 : 0x01));
1327 static struct it87_data *it87_update_device(struct device *dev)
1329 struct it87_data *data = dev_get_drvdata(dev);
1332 mutex_lock(&data->update_lock);
1334 if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
1338 /* Cleared after each update, so reenable. Value
1339 returned by this read will be previous value */
1340 it87_write_value(data, IT87_REG_CONFIG,
1341 it87_read_value(data, IT87_REG_CONFIG) | 0x40);
1343 for (i = 0; i <= 7; i++) {
1345 it87_read_value(data, IT87_REG_VIN(i));
1347 it87_read_value(data, IT87_REG_VIN_MIN(i));
1349 it87_read_value(data, IT87_REG_VIN_MAX(i));
1351 /* in8 (battery) has no limit registers */
1353 it87_read_value(data, IT87_REG_VIN(8));
1355 for (i = 0; i < 5; i++) {
1356 /* Skip disabled fans */
1357 if (!(data->has_fan & (1 << i)))
1361 it87_read_value(data, IT87_REG_FAN_MIN[i]);
1362 data->fan[i] = it87_read_value(data,
1364 /* Add high byte if in 16-bit mode */
1365 if (data->type == it8716 || data->type == it8718) {
1366 data->fan[i] |= it87_read_value(data,
1367 IT87_REG_FANX[i]) << 8;
1368 data->fan_min[i] |= it87_read_value(data,
1369 IT87_REG_FANX_MIN[i]) << 8;
1372 for (i = 0; i < 3; i++) {
1374 it87_read_value(data, IT87_REG_TEMP(i));
1375 data->temp_high[i] =
1376 it87_read_value(data, IT87_REG_TEMP_HIGH(i));
1378 it87_read_value(data, IT87_REG_TEMP_LOW(i));
1381 /* Newer chips don't have clock dividers */
1382 if ((data->has_fan & 0x07) && data->type != it8716
1383 && data->type != it8718) {
1384 i = it87_read_value(data, IT87_REG_FAN_DIV);
1385 data->fan_div[0] = i & 0x07;
1386 data->fan_div[1] = (i >> 3) & 0x07;
1387 data->fan_div[2] = (i & 0x40) ? 3 : 1;
1391 it87_read_value(data, IT87_REG_ALARM1) |
1392 (it87_read_value(data, IT87_REG_ALARM2) << 8) |
1393 (it87_read_value(data, IT87_REG_ALARM3) << 16);
1394 data->fan_main_ctrl = it87_read_value(data,
1395 IT87_REG_FAN_MAIN_CTRL);
1396 data->fan_ctl = it87_read_value(data, IT87_REG_FAN_CTL);
1398 data->sensor = it87_read_value(data, IT87_REG_TEMP_ENABLE);
1399 /* The 8705 does not have VID capability */
1400 if (data->type == it8712 || data->type == it8716) {
1401 data->vid = it87_read_value(data, IT87_REG_VID);
1402 /* The older IT8712F revisions had only 5 VID pins,
1403 but we assume it is always safe to read 6 bits. */
1406 data->last_updated = jiffies;
1410 mutex_unlock(&data->update_lock);
1415 static int __init it87_device_add(unsigned short address,
1416 const struct it87_sio_data *sio_data)
1418 struct resource res = {
1419 .start = address + IT87_EC_OFFSET,
1420 .end = address + IT87_EC_OFFSET + IT87_EC_EXTENT - 1,
1422 .flags = IORESOURCE_IO,
1426 pdev = platform_device_alloc(DRVNAME, address);
1429 printk(KERN_ERR DRVNAME ": Device allocation failed\n");
1433 err = platform_device_add_resources(pdev, &res, 1);
1435 printk(KERN_ERR DRVNAME ": Device resource addition failed "
1437 goto exit_device_put;
1440 err = platform_device_add_data(pdev, sio_data,
1441 sizeof(struct it87_sio_data));
1443 printk(KERN_ERR DRVNAME ": Platform data allocation failed\n");
1444 goto exit_device_put;
1447 err = platform_device_add(pdev);
1449 printk(KERN_ERR DRVNAME ": Device addition failed (%d)\n",
1451 goto exit_device_put;
1457 platform_device_put(pdev);
1462 static int __init sm_it87_init(void)
1465 unsigned short isa_address=0;
1466 struct it87_sio_data sio_data;
1468 err = it87_find(&isa_address, &sio_data);
1471 err = platform_driver_register(&it87_driver);
1475 err = it87_device_add(isa_address, &sio_data);
1477 platform_driver_unregister(&it87_driver);
1484 static void __exit sm_it87_exit(void)
1486 platform_device_unregister(pdev);
1487 platform_driver_unregister(&it87_driver);
1491 MODULE_AUTHOR("Chris Gauthron <chrisg@0-in.com>, "
1492 "Jean Delvare <khali@linux-fr.org>");
1493 MODULE_DESCRIPTION("IT8705F/8712F/8716F/8718F/8726F, SiS950 driver");
1494 module_param(update_vbat, bool, 0);
1495 MODULE_PARM_DESC(update_vbat, "Update vbat if set else return powerup value");
1496 module_param(fix_pwm_polarity, bool, 0);
1497 MODULE_PARM_DESC(fix_pwm_polarity, "Force PWM polarity to active high (DANGEROUS)");
1498 MODULE_LICENSE("GPL");
1500 module_init(sm_it87_init);
1501 module_exit(sm_it87_exit);