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) 2005-2010 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 */
131 #define IT87_SIO_BEEP_PIN_REG 0xf6 /* Beep pin mapping */
133 /* Update battery voltage after every reading if true */
134 static int update_vbat;
136 /* Not all BIOSes properly configure the PWM registers */
137 static int fix_pwm_polarity;
139 /* Many IT87 constants specified below */
141 /* Length of ISA address segment */
142 #define IT87_EXTENT 8
144 /* Length of ISA address segment for Environmental Controller */
145 #define IT87_EC_EXTENT 2
147 /* Offset of EC registers from ISA base address */
148 #define IT87_EC_OFFSET 5
150 /* Where are the ISA address/data registers relative to the EC base address */
151 #define IT87_ADDR_REG_OFFSET 0
152 #define IT87_DATA_REG_OFFSET 1
154 /*----- The IT87 registers -----*/
156 #define IT87_REG_CONFIG 0x00
158 #define IT87_REG_ALARM1 0x01
159 #define IT87_REG_ALARM2 0x02
160 #define IT87_REG_ALARM3 0x03
162 /* The IT8718F and IT8720F have the VID value in a different register, in
163 Super-I/O configuration space. */
164 #define IT87_REG_VID 0x0a
165 /* The IT8705F and IT8712F earlier than revision 0x08 use register 0x0b
166 for fan divisors. Later IT8712F revisions must use 16-bit tachometer
168 #define IT87_REG_FAN_DIV 0x0b
169 #define IT87_REG_FAN_16BIT 0x0c
171 /* Monitors: 9 voltage (0 to 7, battery), 3 temp (1 to 3), 3 fan (1 to 3) */
173 static const u8 IT87_REG_FAN[] = { 0x0d, 0x0e, 0x0f, 0x80, 0x82 };
174 static const u8 IT87_REG_FAN_MIN[] = { 0x10, 0x11, 0x12, 0x84, 0x86 };
175 static const u8 IT87_REG_FANX[] = { 0x18, 0x19, 0x1a, 0x81, 0x83 };
176 static const u8 IT87_REG_FANX_MIN[] = { 0x1b, 0x1c, 0x1d, 0x85, 0x87 };
177 #define IT87_REG_FAN_MAIN_CTRL 0x13
178 #define IT87_REG_FAN_CTL 0x14
179 #define IT87_REG_PWM(nr) (0x15 + (nr))
181 #define IT87_REG_VIN(nr) (0x20 + (nr))
182 #define IT87_REG_TEMP(nr) (0x29 + (nr))
184 #define IT87_REG_VIN_MAX(nr) (0x30 + (nr) * 2)
185 #define IT87_REG_VIN_MIN(nr) (0x31 + (nr) * 2)
186 #define IT87_REG_TEMP_HIGH(nr) (0x40 + (nr) * 2)
187 #define IT87_REG_TEMP_LOW(nr) (0x41 + (nr) * 2)
189 #define IT87_REG_VIN_ENABLE 0x50
190 #define IT87_REG_TEMP_ENABLE 0x51
191 #define IT87_REG_BEEP_ENABLE 0x5c
193 #define IT87_REG_CHIPID 0x58
195 #define IN_TO_REG(val) (SENSORS_LIMIT((((val) + 8)/16),0,255))
196 #define IN_FROM_REG(val) ((val) * 16)
198 static inline u8 FAN_TO_REG(long rpm, int div)
202 rpm = SENSORS_LIMIT(rpm, 1, 1000000);
203 return SENSORS_LIMIT((1350000 + rpm * div / 2) / (rpm * div), 1,
207 static inline u16 FAN16_TO_REG(long rpm)
211 return SENSORS_LIMIT((1350000 + rpm) / (rpm * 2), 1, 0xfffe);
214 #define FAN_FROM_REG(val,div) ((val)==0?-1:(val)==255?0:1350000/((val)*(div)))
215 /* The divider is fixed to 2 in 16-bit mode */
216 #define FAN16_FROM_REG(val) ((val)==0?-1:(val)==0xffff?0:1350000/((val)*2))
218 #define TEMP_TO_REG(val) (SENSORS_LIMIT(((val)<0?(((val)-500)/1000):\
219 ((val)+500)/1000),-128,127))
220 #define TEMP_FROM_REG(val) ((val) * 1000)
222 #define PWM_TO_REG(val) ((val) >> 1)
223 #define PWM_FROM_REG(val) (((val)&0x7f) << 1)
225 static int DIV_TO_REG(int val)
228 while (answer < 7 && (val >>= 1))
232 #define DIV_FROM_REG(val) (1 << (val))
234 static const unsigned int pwm_freq[8] = {
246 struct it87_sio_data {
248 /* Values read from Super-I/O config space */
252 /* Features skipped based on config or DMI */
258 /* For each registered chip, we need to keep some data in memory.
259 The structure is dynamically allocated. */
261 struct device *hwmon_dev;
267 struct mutex update_lock;
268 char valid; /* !=0 if following fields are valid */
269 unsigned long last_updated; /* In jiffies */
271 u8 in[9]; /* Register value */
272 u8 in_max[8]; /* Register value */
273 u8 in_min[8]; /* Register value */
274 u8 has_fan; /* Bitfield, fans enabled */
275 u16 fan[5]; /* Register values, possibly combined */
276 u16 fan_min[5]; /* Register values, possibly combined */
277 s8 temp[3]; /* Register value */
278 s8 temp_high[3]; /* Register value */
279 s8 temp_low[3]; /* Register value */
280 u8 sensor; /* Register value */
281 u8 fan_div[3]; /* Register encoding, shifted right */
282 u8 vid; /* Register encoding, combined */
284 u32 alarms; /* Register encoding, combined */
285 u8 beeps; /* Register encoding */
286 u8 fan_main_ctrl; /* Register value */
287 u8 fan_ctl; /* Register value */
289 /* The following 3 arrays correspond to the same registers. The
290 * meaning of bits 6-0 depends on the value of bit 7, and we want
291 * to preserve settings on mode changes, so we have to track all
292 * values separately. */
293 u8 pwm_ctrl[3]; /* Register value */
294 u8 pwm_duty[3]; /* Manual PWM value set by user (bit 6-0) */
295 u8 pwm_temp_map[3]; /* PWM to temp. chan. mapping (bits 1-0) */
298 static inline int has_16bit_fans(const struct it87_data *data)
300 /* IT8705F Datasheet 0.4.1, 3h == Version G.
301 IT8712F Datasheet 0.9.1, section 8.3.5 indicates 8h == Version J.
302 These are the first revisions with 16bit tachometer support. */
303 return (data->type == it87 && data->revision >= 0x03)
304 || (data->type == it8712 && data->revision >= 0x08)
305 || data->type == it8716
306 || data->type == it8718
307 || data->type == it8720;
310 static int it87_probe(struct platform_device *pdev);
311 static int __devexit it87_remove(struct platform_device *pdev);
313 static int it87_read_value(struct it87_data *data, u8 reg);
314 static void it87_write_value(struct it87_data *data, u8 reg, u8 value);
315 static struct it87_data *it87_update_device(struct device *dev);
316 static int it87_check_pwm(struct device *dev);
317 static void it87_init_device(struct platform_device *pdev);
320 static struct platform_driver it87_driver = {
322 .owner = THIS_MODULE,
326 .remove = __devexit_p(it87_remove),
329 static ssize_t show_in(struct device *dev, struct device_attribute *attr,
332 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
333 int nr = sensor_attr->index;
335 struct it87_data *data = it87_update_device(dev);
336 return sprintf(buf, "%d\n", IN_FROM_REG(data->in[nr]));
339 static ssize_t show_in_min(struct device *dev, struct device_attribute *attr,
342 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
343 int nr = sensor_attr->index;
345 struct it87_data *data = it87_update_device(dev);
346 return sprintf(buf, "%d\n", IN_FROM_REG(data->in_min[nr]));
349 static ssize_t show_in_max(struct device *dev, struct device_attribute *attr,
352 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
353 int nr = sensor_attr->index;
355 struct it87_data *data = it87_update_device(dev);
356 return sprintf(buf, "%d\n", IN_FROM_REG(data->in_max[nr]));
359 static ssize_t set_in_min(struct device *dev, struct device_attribute *attr,
360 const char *buf, size_t count)
362 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
363 int nr = sensor_attr->index;
365 struct it87_data *data = dev_get_drvdata(dev);
368 if (strict_strtoul(buf, 10, &val) < 0)
371 mutex_lock(&data->update_lock);
372 data->in_min[nr] = IN_TO_REG(val);
373 it87_write_value(data, IT87_REG_VIN_MIN(nr),
375 mutex_unlock(&data->update_lock);
378 static ssize_t set_in_max(struct device *dev, struct device_attribute *attr,
379 const char *buf, size_t count)
381 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
382 int nr = sensor_attr->index;
384 struct it87_data *data = dev_get_drvdata(dev);
387 if (strict_strtoul(buf, 10, &val) < 0)
390 mutex_lock(&data->update_lock);
391 data->in_max[nr] = IN_TO_REG(val);
392 it87_write_value(data, IT87_REG_VIN_MAX(nr),
394 mutex_unlock(&data->update_lock);
398 #define show_in_offset(offset) \
399 static SENSOR_DEVICE_ATTR(in##offset##_input, S_IRUGO, \
400 show_in, NULL, offset);
402 #define limit_in_offset(offset) \
403 static SENSOR_DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \
404 show_in_min, set_in_min, offset); \
405 static SENSOR_DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \
406 show_in_max, set_in_max, offset);
427 static ssize_t show_temp(struct device *dev, struct device_attribute *attr,
430 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
431 int nr = sensor_attr->index;
433 struct it87_data *data = it87_update_device(dev);
434 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[nr]));
436 static ssize_t show_temp_max(struct device *dev, struct device_attribute *attr,
439 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
440 int nr = sensor_attr->index;
442 struct it87_data *data = it87_update_device(dev);
443 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_high[nr]));
445 static ssize_t show_temp_min(struct device *dev, struct device_attribute *attr,
448 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
449 int nr = sensor_attr->index;
451 struct it87_data *data = it87_update_device(dev);
452 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_low[nr]));
454 static ssize_t set_temp_max(struct device *dev, struct device_attribute *attr,
455 const char *buf, size_t count)
457 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
458 int nr = sensor_attr->index;
460 struct it87_data *data = dev_get_drvdata(dev);
463 if (strict_strtol(buf, 10, &val) < 0)
466 mutex_lock(&data->update_lock);
467 data->temp_high[nr] = TEMP_TO_REG(val);
468 it87_write_value(data, IT87_REG_TEMP_HIGH(nr), data->temp_high[nr]);
469 mutex_unlock(&data->update_lock);
472 static ssize_t set_temp_min(struct device *dev, struct device_attribute *attr,
473 const char *buf, size_t count)
475 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
476 int nr = sensor_attr->index;
478 struct it87_data *data = dev_get_drvdata(dev);
481 if (strict_strtol(buf, 10, &val) < 0)
484 mutex_lock(&data->update_lock);
485 data->temp_low[nr] = TEMP_TO_REG(val);
486 it87_write_value(data, IT87_REG_TEMP_LOW(nr), data->temp_low[nr]);
487 mutex_unlock(&data->update_lock);
490 #define show_temp_offset(offset) \
491 static SENSOR_DEVICE_ATTR(temp##offset##_input, S_IRUGO, \
492 show_temp, NULL, offset - 1); \
493 static SENSOR_DEVICE_ATTR(temp##offset##_max, S_IRUGO | S_IWUSR, \
494 show_temp_max, set_temp_max, offset - 1); \
495 static SENSOR_DEVICE_ATTR(temp##offset##_min, S_IRUGO | S_IWUSR, \
496 show_temp_min, set_temp_min, offset - 1);
502 static ssize_t show_sensor(struct device *dev, struct device_attribute *attr,
505 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
506 int nr = sensor_attr->index;
508 struct it87_data *data = it87_update_device(dev);
509 u8 reg = data->sensor; /* In case the value is updated while
513 return sprintf(buf, "3\n"); /* thermal diode */
515 return sprintf(buf, "4\n"); /* thermistor */
516 return sprintf(buf, "0\n"); /* disabled */
518 static ssize_t set_sensor(struct device *dev, struct device_attribute *attr,
519 const char *buf, size_t count)
521 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
522 int nr = sensor_attr->index;
524 struct it87_data *data = dev_get_drvdata(dev);
527 if (strict_strtol(buf, 10, &val) < 0)
530 mutex_lock(&data->update_lock);
532 data->sensor &= ~(1 << nr);
533 data->sensor &= ~(8 << nr);
534 if (val == 2) { /* backwards compatibility */
535 dev_warn(dev, "Sensor type 2 is deprecated, please use 4 "
539 /* 3 = thermal diode; 4 = thermistor; 0 = disabled */
541 data->sensor |= 1 << nr;
543 data->sensor |= 8 << nr;
545 mutex_unlock(&data->update_lock);
548 it87_write_value(data, IT87_REG_TEMP_ENABLE, data->sensor);
549 mutex_unlock(&data->update_lock);
552 #define show_sensor_offset(offset) \
553 static SENSOR_DEVICE_ATTR(temp##offset##_type, S_IRUGO | S_IWUSR, \
554 show_sensor, set_sensor, offset - 1);
556 show_sensor_offset(1);
557 show_sensor_offset(2);
558 show_sensor_offset(3);
562 static int pwm_mode(const struct it87_data *data, int nr)
564 int ctrl = data->fan_main_ctrl & (1 << nr);
566 if (ctrl == 0) /* Full speed */
568 if (data->pwm_ctrl[nr] & 0x80) /* Automatic mode */
570 else /* Manual mode */
574 static ssize_t show_fan(struct device *dev, struct device_attribute *attr,
577 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
578 int nr = sensor_attr->index;
580 struct it87_data *data = it87_update_device(dev);
581 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[nr],
582 DIV_FROM_REG(data->fan_div[nr])));
584 static ssize_t show_fan_min(struct device *dev, struct device_attribute *attr,
587 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
588 int nr = sensor_attr->index;
590 struct it87_data *data = it87_update_device(dev);
591 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[nr],
592 DIV_FROM_REG(data->fan_div[nr])));
594 static ssize_t show_fan_div(struct device *dev, struct device_attribute *attr,
597 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
598 int nr = sensor_attr->index;
600 struct it87_data *data = it87_update_device(dev);
601 return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr]));
603 static ssize_t show_pwm_enable(struct device *dev,
604 struct device_attribute *attr, char *buf)
606 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
607 int nr = sensor_attr->index;
609 struct it87_data *data = it87_update_device(dev);
610 return sprintf(buf, "%d\n", pwm_mode(data, nr));
612 static ssize_t show_pwm(struct device *dev, struct device_attribute *attr,
615 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
616 int nr = sensor_attr->index;
618 struct it87_data *data = it87_update_device(dev);
619 return sprintf(buf, "%d\n", PWM_FROM_REG(data->pwm_duty[nr]));
621 static ssize_t show_pwm_freq(struct device *dev, struct device_attribute *attr,
624 struct it87_data *data = it87_update_device(dev);
625 int index = (data->fan_ctl >> 4) & 0x07;
627 return sprintf(buf, "%u\n", pwm_freq[index]);
629 static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr,
630 const char *buf, size_t count)
632 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
633 int nr = sensor_attr->index;
635 struct it87_data *data = dev_get_drvdata(dev);
639 if (strict_strtol(buf, 10, &val) < 0)
642 mutex_lock(&data->update_lock);
643 reg = it87_read_value(data, IT87_REG_FAN_DIV);
646 data->fan_div[nr] = reg & 0x07;
649 data->fan_div[nr] = (reg >> 3) & 0x07;
652 data->fan_div[nr] = (reg & 0x40) ? 3 : 1;
656 data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr]));
657 it87_write_value(data, IT87_REG_FAN_MIN[nr], data->fan_min[nr]);
658 mutex_unlock(&data->update_lock);
661 static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr,
662 const char *buf, size_t count)
664 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
665 int nr = sensor_attr->index;
667 struct it87_data *data = dev_get_drvdata(dev);
672 if (strict_strtoul(buf, 10, &val) < 0)
675 mutex_lock(&data->update_lock);
676 old = it87_read_value(data, IT87_REG_FAN_DIV);
678 /* Save fan min limit */
679 min = FAN_FROM_REG(data->fan_min[nr], DIV_FROM_REG(data->fan_div[nr]));
684 data->fan_div[nr] = DIV_TO_REG(val);
688 data->fan_div[nr] = 1;
690 data->fan_div[nr] = 3;
693 val |= (data->fan_div[0] & 0x07);
694 val |= (data->fan_div[1] & 0x07) << 3;
695 if (data->fan_div[2] == 3)
697 it87_write_value(data, IT87_REG_FAN_DIV, val);
699 /* Restore fan min limit */
700 data->fan_min[nr] = FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr]));
701 it87_write_value(data, IT87_REG_FAN_MIN[nr], data->fan_min[nr]);
703 mutex_unlock(&data->update_lock);
706 static ssize_t set_pwm_enable(struct device *dev,
707 struct device_attribute *attr, const char *buf, size_t count)
709 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
710 int nr = sensor_attr->index;
712 struct it87_data *data = dev_get_drvdata(dev);
715 if (strict_strtol(buf, 10, &val) < 0 || val < 0 || val > 2)
718 mutex_lock(&data->update_lock);
722 /* make sure the fan is on when in on/off mode */
723 tmp = it87_read_value(data, IT87_REG_FAN_CTL);
724 it87_write_value(data, IT87_REG_FAN_CTL, tmp | (1 << nr));
725 /* set on/off mode */
726 data->fan_main_ctrl &= ~(1 << nr);
727 it87_write_value(data, IT87_REG_FAN_MAIN_CTRL,
728 data->fan_main_ctrl);
730 if (val == 1) /* Manual mode */
731 data->pwm_ctrl[nr] = data->pwm_duty[nr];
732 else /* Automatic mode */
733 data->pwm_ctrl[nr] = 0x80 | data->pwm_temp_map[nr];
734 it87_write_value(data, IT87_REG_PWM(nr), data->pwm_ctrl[nr]);
735 /* set SmartGuardian mode */
736 data->fan_main_ctrl |= (1 << nr);
737 it87_write_value(data, IT87_REG_FAN_MAIN_CTRL,
738 data->fan_main_ctrl);
741 mutex_unlock(&data->update_lock);
744 static ssize_t set_pwm(struct device *dev, struct device_attribute *attr,
745 const char *buf, size_t count)
747 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
748 int nr = sensor_attr->index;
750 struct it87_data *data = dev_get_drvdata(dev);
753 if (strict_strtol(buf, 10, &val) < 0 || val < 0 || val > 255)
756 mutex_lock(&data->update_lock);
757 data->pwm_duty[nr] = PWM_TO_REG(val);
758 /* If we are in manual mode, write the duty cycle immediately;
759 * otherwise, just store it for later use. */
760 if (!(data->pwm_ctrl[nr] & 0x80)) {
761 data->pwm_ctrl[nr] = data->pwm_duty[nr];
762 it87_write_value(data, IT87_REG_PWM(nr), data->pwm_ctrl[nr]);
764 mutex_unlock(&data->update_lock);
767 static ssize_t set_pwm_freq(struct device *dev,
768 struct device_attribute *attr, const char *buf, size_t count)
770 struct it87_data *data = dev_get_drvdata(dev);
774 if (strict_strtoul(buf, 10, &val) < 0)
777 /* Search for the nearest available frequency */
778 for (i = 0; i < 7; i++) {
779 if (val > (pwm_freq[i] + pwm_freq[i+1]) / 2)
783 mutex_lock(&data->update_lock);
784 data->fan_ctl = it87_read_value(data, IT87_REG_FAN_CTL) & 0x8f;
785 data->fan_ctl |= i << 4;
786 it87_write_value(data, IT87_REG_FAN_CTL, data->fan_ctl);
787 mutex_unlock(&data->update_lock);
791 static ssize_t show_pwm_temp_map(struct device *dev,
792 struct device_attribute *attr, char *buf)
794 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
795 int nr = sensor_attr->index;
797 struct it87_data *data = it87_update_device(dev);
800 if (data->pwm_temp_map[nr] < 3)
801 map = 1 << data->pwm_temp_map[nr];
803 map = 0; /* Should never happen */
804 return sprintf(buf, "%d\n", map);
806 static ssize_t set_pwm_temp_map(struct device *dev,
807 struct device_attribute *attr, const char *buf, size_t count)
809 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
810 int nr = sensor_attr->index;
812 struct it87_data *data = dev_get_drvdata(dev);
816 if (strict_strtol(buf, 10, &val) < 0)
833 mutex_lock(&data->update_lock);
834 data->pwm_temp_map[nr] = reg;
835 /* If we are in automatic mode, write the temp mapping immediately;
836 * otherwise, just store it for later use. */
837 if (data->pwm_ctrl[nr] & 0x80) {
838 data->pwm_ctrl[nr] = 0x80 | data->pwm_temp_map[nr];
839 it87_write_value(data, IT87_REG_PWM(nr), data->pwm_ctrl[nr]);
841 mutex_unlock(&data->update_lock);
845 #define show_fan_offset(offset) \
846 static SENSOR_DEVICE_ATTR(fan##offset##_input, S_IRUGO, \
847 show_fan, NULL, offset - 1); \
848 static SENSOR_DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \
849 show_fan_min, set_fan_min, offset - 1); \
850 static SENSOR_DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR, \
851 show_fan_div, set_fan_div, offset - 1);
857 #define show_pwm_offset(offset) \
858 static SENSOR_DEVICE_ATTR(pwm##offset##_enable, S_IRUGO | S_IWUSR, \
859 show_pwm_enable, set_pwm_enable, offset - 1); \
860 static SENSOR_DEVICE_ATTR(pwm##offset, S_IRUGO | S_IWUSR, \
861 show_pwm, set_pwm, offset - 1); \
862 static DEVICE_ATTR(pwm##offset##_freq, \
863 (offset == 1 ? S_IRUGO | S_IWUSR : S_IRUGO), \
864 show_pwm_freq, (offset == 1 ? set_pwm_freq : NULL)); \
865 static SENSOR_DEVICE_ATTR(pwm##offset##_auto_channels_temp, \
866 S_IRUGO, show_pwm_temp_map, set_pwm_temp_map, \
873 /* A different set of callbacks for 16-bit fans */
874 static ssize_t show_fan16(struct device *dev, struct device_attribute *attr,
877 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
878 int nr = sensor_attr->index;
879 struct it87_data *data = it87_update_device(dev);
880 return sprintf(buf, "%d\n", FAN16_FROM_REG(data->fan[nr]));
883 static ssize_t show_fan16_min(struct device *dev, struct device_attribute *attr,
886 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
887 int nr = sensor_attr->index;
888 struct it87_data *data = it87_update_device(dev);
889 return sprintf(buf, "%d\n", FAN16_FROM_REG(data->fan_min[nr]));
892 static ssize_t set_fan16_min(struct device *dev, struct device_attribute *attr,
893 const char *buf, size_t count)
895 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
896 int nr = sensor_attr->index;
897 struct it87_data *data = dev_get_drvdata(dev);
900 if (strict_strtol(buf, 10, &val) < 0)
903 mutex_lock(&data->update_lock);
904 data->fan_min[nr] = FAN16_TO_REG(val);
905 it87_write_value(data, IT87_REG_FAN_MIN[nr],
906 data->fan_min[nr] & 0xff);
907 it87_write_value(data, IT87_REG_FANX_MIN[nr],
908 data->fan_min[nr] >> 8);
909 mutex_unlock(&data->update_lock);
913 /* We want to use the same sysfs file names as 8-bit fans, but we need
914 different variable names, so we have to use SENSOR_ATTR instead of
915 SENSOR_DEVICE_ATTR. */
916 #define show_fan16_offset(offset) \
917 static struct sensor_device_attribute sensor_dev_attr_fan##offset##_input16 \
918 = SENSOR_ATTR(fan##offset##_input, S_IRUGO, \
919 show_fan16, NULL, offset - 1); \
920 static struct sensor_device_attribute sensor_dev_attr_fan##offset##_min16 \
921 = SENSOR_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \
922 show_fan16_min, set_fan16_min, offset - 1)
924 show_fan16_offset(1);
925 show_fan16_offset(2);
926 show_fan16_offset(3);
927 show_fan16_offset(4);
928 show_fan16_offset(5);
931 static ssize_t show_alarms(struct device *dev, struct device_attribute *attr,
934 struct it87_data *data = it87_update_device(dev);
935 return sprintf(buf, "%u\n", data->alarms);
937 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
939 static ssize_t show_alarm(struct device *dev, struct device_attribute *attr,
942 int bitnr = to_sensor_dev_attr(attr)->index;
943 struct it87_data *data = it87_update_device(dev);
944 return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1);
946 static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 8);
947 static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 9);
948 static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 10);
949 static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 11);
950 static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 12);
951 static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 13);
952 static SENSOR_DEVICE_ATTR(in6_alarm, S_IRUGO, show_alarm, NULL, 14);
953 static SENSOR_DEVICE_ATTR(in7_alarm, S_IRUGO, show_alarm, NULL, 15);
954 static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 0);
955 static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 1);
956 static SENSOR_DEVICE_ATTR(fan3_alarm, S_IRUGO, show_alarm, NULL, 2);
957 static SENSOR_DEVICE_ATTR(fan4_alarm, S_IRUGO, show_alarm, NULL, 3);
958 static SENSOR_DEVICE_ATTR(fan5_alarm, S_IRUGO, show_alarm, NULL, 6);
959 static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 16);
960 static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 17);
961 static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL, 18);
963 static ssize_t show_beep(struct device *dev, struct device_attribute *attr,
966 int bitnr = to_sensor_dev_attr(attr)->index;
967 struct it87_data *data = it87_update_device(dev);
968 return sprintf(buf, "%u\n", (data->beeps >> bitnr) & 1);
970 static ssize_t set_beep(struct device *dev, struct device_attribute *attr,
971 const char *buf, size_t count)
973 int bitnr = to_sensor_dev_attr(attr)->index;
974 struct it87_data *data = dev_get_drvdata(dev);
977 if (strict_strtol(buf, 10, &val) < 0
978 || (val != 0 && val != 1))
981 mutex_lock(&data->update_lock);
982 data->beeps = it87_read_value(data, IT87_REG_BEEP_ENABLE);
984 data->beeps |= (1 << bitnr);
986 data->beeps &= ~(1 << bitnr);
987 it87_write_value(data, IT87_REG_BEEP_ENABLE, data->beeps);
988 mutex_unlock(&data->update_lock);
992 static SENSOR_DEVICE_ATTR(in0_beep, S_IRUGO | S_IWUSR,
993 show_beep, set_beep, 1);
994 static SENSOR_DEVICE_ATTR(in1_beep, S_IRUGO, show_beep, NULL, 1);
995 static SENSOR_DEVICE_ATTR(in2_beep, S_IRUGO, show_beep, NULL, 1);
996 static SENSOR_DEVICE_ATTR(in3_beep, S_IRUGO, show_beep, NULL, 1);
997 static SENSOR_DEVICE_ATTR(in4_beep, S_IRUGO, show_beep, NULL, 1);
998 static SENSOR_DEVICE_ATTR(in5_beep, S_IRUGO, show_beep, NULL, 1);
999 static SENSOR_DEVICE_ATTR(in6_beep, S_IRUGO, show_beep, NULL, 1);
1000 static SENSOR_DEVICE_ATTR(in7_beep, S_IRUGO, show_beep, NULL, 1);
1001 /* fanX_beep writability is set later */
1002 static SENSOR_DEVICE_ATTR(fan1_beep, S_IRUGO, show_beep, set_beep, 0);
1003 static SENSOR_DEVICE_ATTR(fan2_beep, S_IRUGO, show_beep, set_beep, 0);
1004 static SENSOR_DEVICE_ATTR(fan3_beep, S_IRUGO, show_beep, set_beep, 0);
1005 static SENSOR_DEVICE_ATTR(fan4_beep, S_IRUGO, show_beep, set_beep, 0);
1006 static SENSOR_DEVICE_ATTR(fan5_beep, S_IRUGO, show_beep, set_beep, 0);
1007 static SENSOR_DEVICE_ATTR(temp1_beep, S_IRUGO | S_IWUSR,
1008 show_beep, set_beep, 2);
1009 static SENSOR_DEVICE_ATTR(temp2_beep, S_IRUGO, show_beep, NULL, 2);
1010 static SENSOR_DEVICE_ATTR(temp3_beep, S_IRUGO, show_beep, NULL, 2);
1012 static ssize_t show_vrm_reg(struct device *dev, struct device_attribute *attr,
1015 struct it87_data *data = dev_get_drvdata(dev);
1016 return sprintf(buf, "%u\n", data->vrm);
1018 static ssize_t store_vrm_reg(struct device *dev, struct device_attribute *attr,
1019 const char *buf, size_t count)
1021 struct it87_data *data = dev_get_drvdata(dev);
1024 if (strict_strtoul(buf, 10, &val) < 0)
1031 static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm_reg, store_vrm_reg);
1033 static ssize_t show_vid_reg(struct device *dev, struct device_attribute *attr,
1036 struct it87_data *data = it87_update_device(dev);
1037 return sprintf(buf, "%ld\n", (long) vid_from_reg(data->vid, data->vrm));
1039 static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid_reg, NULL);
1041 static ssize_t show_name(struct device *dev, struct device_attribute
1042 *devattr, char *buf)
1044 struct it87_data *data = dev_get_drvdata(dev);
1045 return sprintf(buf, "%s\n", data->name);
1047 static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
1049 static struct attribute *it87_attributes[] = {
1050 &sensor_dev_attr_in0_input.dev_attr.attr,
1051 &sensor_dev_attr_in1_input.dev_attr.attr,
1052 &sensor_dev_attr_in2_input.dev_attr.attr,
1053 &sensor_dev_attr_in3_input.dev_attr.attr,
1054 &sensor_dev_attr_in4_input.dev_attr.attr,
1055 &sensor_dev_attr_in5_input.dev_attr.attr,
1056 &sensor_dev_attr_in6_input.dev_attr.attr,
1057 &sensor_dev_attr_in7_input.dev_attr.attr,
1058 &sensor_dev_attr_in8_input.dev_attr.attr,
1059 &sensor_dev_attr_in0_min.dev_attr.attr,
1060 &sensor_dev_attr_in1_min.dev_attr.attr,
1061 &sensor_dev_attr_in2_min.dev_attr.attr,
1062 &sensor_dev_attr_in3_min.dev_attr.attr,
1063 &sensor_dev_attr_in4_min.dev_attr.attr,
1064 &sensor_dev_attr_in5_min.dev_attr.attr,
1065 &sensor_dev_attr_in6_min.dev_attr.attr,
1066 &sensor_dev_attr_in7_min.dev_attr.attr,
1067 &sensor_dev_attr_in0_max.dev_attr.attr,
1068 &sensor_dev_attr_in1_max.dev_attr.attr,
1069 &sensor_dev_attr_in2_max.dev_attr.attr,
1070 &sensor_dev_attr_in3_max.dev_attr.attr,
1071 &sensor_dev_attr_in4_max.dev_attr.attr,
1072 &sensor_dev_attr_in5_max.dev_attr.attr,
1073 &sensor_dev_attr_in6_max.dev_attr.attr,
1074 &sensor_dev_attr_in7_max.dev_attr.attr,
1075 &sensor_dev_attr_in0_alarm.dev_attr.attr,
1076 &sensor_dev_attr_in1_alarm.dev_attr.attr,
1077 &sensor_dev_attr_in2_alarm.dev_attr.attr,
1078 &sensor_dev_attr_in3_alarm.dev_attr.attr,
1079 &sensor_dev_attr_in4_alarm.dev_attr.attr,
1080 &sensor_dev_attr_in5_alarm.dev_attr.attr,
1081 &sensor_dev_attr_in6_alarm.dev_attr.attr,
1082 &sensor_dev_attr_in7_alarm.dev_attr.attr,
1084 &sensor_dev_attr_temp1_input.dev_attr.attr,
1085 &sensor_dev_attr_temp2_input.dev_attr.attr,
1086 &sensor_dev_attr_temp3_input.dev_attr.attr,
1087 &sensor_dev_attr_temp1_max.dev_attr.attr,
1088 &sensor_dev_attr_temp2_max.dev_attr.attr,
1089 &sensor_dev_attr_temp3_max.dev_attr.attr,
1090 &sensor_dev_attr_temp1_min.dev_attr.attr,
1091 &sensor_dev_attr_temp2_min.dev_attr.attr,
1092 &sensor_dev_attr_temp3_min.dev_attr.attr,
1093 &sensor_dev_attr_temp1_type.dev_attr.attr,
1094 &sensor_dev_attr_temp2_type.dev_attr.attr,
1095 &sensor_dev_attr_temp3_type.dev_attr.attr,
1096 &sensor_dev_attr_temp1_alarm.dev_attr.attr,
1097 &sensor_dev_attr_temp2_alarm.dev_attr.attr,
1098 &sensor_dev_attr_temp3_alarm.dev_attr.attr,
1100 &dev_attr_alarms.attr,
1101 &dev_attr_name.attr,
1105 static const struct attribute_group it87_group = {
1106 .attrs = it87_attributes,
1109 static struct attribute *it87_attributes_beep[] = {
1110 &sensor_dev_attr_in0_beep.dev_attr.attr,
1111 &sensor_dev_attr_in1_beep.dev_attr.attr,
1112 &sensor_dev_attr_in2_beep.dev_attr.attr,
1113 &sensor_dev_attr_in3_beep.dev_attr.attr,
1114 &sensor_dev_attr_in4_beep.dev_attr.attr,
1115 &sensor_dev_attr_in5_beep.dev_attr.attr,
1116 &sensor_dev_attr_in6_beep.dev_attr.attr,
1117 &sensor_dev_attr_in7_beep.dev_attr.attr,
1119 &sensor_dev_attr_temp1_beep.dev_attr.attr,
1120 &sensor_dev_attr_temp2_beep.dev_attr.attr,
1121 &sensor_dev_attr_temp3_beep.dev_attr.attr,
1125 static const struct attribute_group it87_group_beep = {
1126 .attrs = it87_attributes_beep,
1129 static struct attribute *it87_attributes_fan16[5][3+1] = { {
1130 &sensor_dev_attr_fan1_input16.dev_attr.attr,
1131 &sensor_dev_attr_fan1_min16.dev_attr.attr,
1132 &sensor_dev_attr_fan1_alarm.dev_attr.attr,
1135 &sensor_dev_attr_fan2_input16.dev_attr.attr,
1136 &sensor_dev_attr_fan2_min16.dev_attr.attr,
1137 &sensor_dev_attr_fan2_alarm.dev_attr.attr,
1140 &sensor_dev_attr_fan3_input16.dev_attr.attr,
1141 &sensor_dev_attr_fan3_min16.dev_attr.attr,
1142 &sensor_dev_attr_fan3_alarm.dev_attr.attr,
1145 &sensor_dev_attr_fan4_input16.dev_attr.attr,
1146 &sensor_dev_attr_fan4_min16.dev_attr.attr,
1147 &sensor_dev_attr_fan4_alarm.dev_attr.attr,
1150 &sensor_dev_attr_fan5_input16.dev_attr.attr,
1151 &sensor_dev_attr_fan5_min16.dev_attr.attr,
1152 &sensor_dev_attr_fan5_alarm.dev_attr.attr,
1156 static const struct attribute_group it87_group_fan16[5] = {
1157 { .attrs = it87_attributes_fan16[0] },
1158 { .attrs = it87_attributes_fan16[1] },
1159 { .attrs = it87_attributes_fan16[2] },
1160 { .attrs = it87_attributes_fan16[3] },
1161 { .attrs = it87_attributes_fan16[4] },
1164 static struct attribute *it87_attributes_fan[3][4+1] = { {
1165 &sensor_dev_attr_fan1_input.dev_attr.attr,
1166 &sensor_dev_attr_fan1_min.dev_attr.attr,
1167 &sensor_dev_attr_fan1_div.dev_attr.attr,
1168 &sensor_dev_attr_fan1_alarm.dev_attr.attr,
1171 &sensor_dev_attr_fan2_input.dev_attr.attr,
1172 &sensor_dev_attr_fan2_min.dev_attr.attr,
1173 &sensor_dev_attr_fan2_div.dev_attr.attr,
1174 &sensor_dev_attr_fan2_alarm.dev_attr.attr,
1177 &sensor_dev_attr_fan3_input.dev_attr.attr,
1178 &sensor_dev_attr_fan3_min.dev_attr.attr,
1179 &sensor_dev_attr_fan3_div.dev_attr.attr,
1180 &sensor_dev_attr_fan3_alarm.dev_attr.attr,
1184 static const struct attribute_group it87_group_fan[3] = {
1185 { .attrs = it87_attributes_fan[0] },
1186 { .attrs = it87_attributes_fan[1] },
1187 { .attrs = it87_attributes_fan[2] },
1190 static const struct attribute_group *
1191 it87_get_fan_group(const struct it87_data *data)
1193 return has_16bit_fans(data) ? it87_group_fan16 : it87_group_fan;
1196 static struct attribute *it87_attributes_pwm[3][4+1] = { {
1197 &sensor_dev_attr_pwm1_enable.dev_attr.attr,
1198 &sensor_dev_attr_pwm1.dev_attr.attr,
1199 &dev_attr_pwm1_freq.attr,
1200 &sensor_dev_attr_pwm1_auto_channels_temp.dev_attr.attr,
1203 &sensor_dev_attr_pwm2_enable.dev_attr.attr,
1204 &sensor_dev_attr_pwm2.dev_attr.attr,
1205 &dev_attr_pwm2_freq.attr,
1206 &sensor_dev_attr_pwm2_auto_channels_temp.dev_attr.attr,
1209 &sensor_dev_attr_pwm3_enable.dev_attr.attr,
1210 &sensor_dev_attr_pwm3.dev_attr.attr,
1211 &dev_attr_pwm3_freq.attr,
1212 &sensor_dev_attr_pwm3_auto_channels_temp.dev_attr.attr,
1216 static const struct attribute_group it87_group_pwm[3] = {
1217 { .attrs = it87_attributes_pwm[0] },
1218 { .attrs = it87_attributes_pwm[1] },
1219 { .attrs = it87_attributes_pwm[2] },
1222 static struct attribute *it87_attributes_fan_beep[] = {
1223 &sensor_dev_attr_fan1_beep.dev_attr.attr,
1224 &sensor_dev_attr_fan2_beep.dev_attr.attr,
1225 &sensor_dev_attr_fan3_beep.dev_attr.attr,
1226 &sensor_dev_attr_fan4_beep.dev_attr.attr,
1227 &sensor_dev_attr_fan5_beep.dev_attr.attr,
1230 static struct attribute *it87_attributes_vid[] = {
1232 &dev_attr_cpu0_vid.attr,
1236 static const struct attribute_group it87_group_vid = {
1237 .attrs = it87_attributes_vid,
1240 /* SuperIO detection - will change isa_address if a chip is found */
1241 static int __init it87_find(unsigned short *address,
1242 struct it87_sio_data *sio_data)
1246 const char *board_vendor, *board_name;
1249 chip_type = force_id ? force_id : superio_inw(DEVID);
1251 switch (chip_type) {
1253 sio_data->type = it87;
1256 sio_data->type = it8712;
1260 sio_data->type = it8716;
1263 sio_data->type = it8718;
1266 sio_data->type = it8720;
1268 case 0xffff: /* No device at all */
1271 pr_debug(DRVNAME ": Unsupported chip (DEVID=0x%x)\n",
1276 superio_select(PME);
1277 if (!(superio_inb(IT87_ACT_REG) & 0x01)) {
1278 pr_info("it87: Device not activated, skipping\n");
1282 *address = superio_inw(IT87_BASE_REG) & ~(IT87_EXTENT - 1);
1283 if (*address == 0) {
1284 pr_info("it87: Base address not set, skipping\n");
1289 sio_data->revision = superio_inb(DEVREV) & 0x0f;
1290 pr_info("it87: Found IT%04xF chip at 0x%x, revision %d\n",
1291 chip_type, *address, sio_data->revision);
1293 /* Read GPIO config and VID value from LDN 7 (GPIO) */
1294 if (sio_data->type == it87) {
1295 /* The IT8705F doesn't have VID pins at all */
1296 sio_data->skip_vid = 1;
1298 /* The IT8705F has a different LD number for GPIO */
1300 sio_data->beep_pin = superio_inb(IT87_SIO_BEEP_PIN_REG) & 0x3f;
1304 superio_select(GPIO);
1305 /* We need at least 4 VID pins */
1306 reg = superio_inb(IT87_SIO_GPIO3_REG);
1308 pr_info("it87: VID is disabled (pins used for GPIO)\n");
1309 sio_data->skip_vid = 1;
1312 /* Check if fan3 is there or not */
1314 sio_data->skip_pwm |= (1 << 2);
1316 sio_data->skip_fan |= (1 << 2);
1318 /* Check if fan2 is there or not */
1319 reg = superio_inb(IT87_SIO_GPIO5_REG);
1321 sio_data->skip_pwm |= (1 << 1);
1323 sio_data->skip_fan |= (1 << 1);
1325 if ((sio_data->type == it8718 || sio_data->type == it8720)
1326 && !(sio_data->skip_vid))
1327 sio_data->vid_value = superio_inb(IT87_SIO_VID_REG);
1329 reg = superio_inb(IT87_SIO_PINX2_REG);
1331 pr_info("it87: in3 is VCC (+5V)\n");
1333 pr_info("it87: in7 is VCCH (+5V Stand-By)\n");
1335 sio_data->beep_pin = superio_inb(IT87_SIO_BEEP_PIN_REG) & 0x3f;
1337 if (sio_data->beep_pin)
1338 pr_info("it87: Beeping is supported\n");
1340 /* Disable specific features based on DMI strings */
1341 board_vendor = dmi_get_system_info(DMI_BOARD_VENDOR);
1342 board_name = dmi_get_system_info(DMI_BOARD_NAME);
1343 if (board_vendor && board_name) {
1344 if (strcmp(board_vendor, "nVIDIA") == 0
1345 && strcmp(board_name, "FN68PT") == 0) {
1346 /* On the Shuttle SN68PT, FAN_CTL2 is apparently not
1347 connected to a fan, but to something else. One user
1348 has reported instant system power-off when changing
1349 the PWM2 duty cycle, so we disable it.
1350 I use the board name string as the trigger in case
1351 the same board is ever used in other systems. */
1352 pr_info("it87: Disabling pwm2 due to "
1353 "hardware constraints\n");
1354 sio_data->skip_pwm = (1 << 1);
1363 static void it87_remove_files(struct device *dev)
1365 struct it87_data *data = platform_get_drvdata(pdev);
1366 struct it87_sio_data *sio_data = dev->platform_data;
1367 const struct attribute_group *fan_group = it87_get_fan_group(data);
1370 sysfs_remove_group(&dev->kobj, &it87_group);
1371 if (sio_data->beep_pin)
1372 sysfs_remove_group(&dev->kobj, &it87_group_beep);
1373 for (i = 0; i < 5; i++) {
1374 if (!(data->has_fan & (1 << i)))
1376 sysfs_remove_group(&dev->kobj, &fan_group[i]);
1377 if (sio_data->beep_pin)
1378 sysfs_remove_file(&dev->kobj,
1379 it87_attributes_fan_beep[i]);
1381 for (i = 0; i < 3; i++) {
1382 if (sio_data->skip_pwm & (1 << 0))
1384 sysfs_remove_group(&dev->kobj, &it87_group_pwm[i]);
1386 if (!sio_data->skip_vid)
1387 sysfs_remove_group(&dev->kobj, &it87_group_vid);
1390 static int __devinit it87_probe(struct platform_device *pdev)
1392 struct it87_data *data;
1393 struct resource *res;
1394 struct device *dev = &pdev->dev;
1395 struct it87_sio_data *sio_data = dev->platform_data;
1396 const struct attribute_group *fan_group;
1398 int enable_pwm_interface;
1399 int fan_beep_need_rw;
1400 static const char *names[] = {
1408 res = platform_get_resource(pdev, IORESOURCE_IO, 0);
1409 if (!request_region(res->start, IT87_EC_EXTENT, DRVNAME)) {
1410 dev_err(dev, "Failed to request region 0x%lx-0x%lx\n",
1411 (unsigned long)res->start,
1412 (unsigned long)(res->start + IT87_EC_EXTENT - 1));
1417 data = kzalloc(sizeof(struct it87_data), GFP_KERNEL);
1423 data->addr = res->start;
1424 data->type = sio_data->type;
1425 data->revision = sio_data->revision;
1426 data->name = names[sio_data->type];
1428 /* Now, we do the remaining detection. */
1429 if ((it87_read_value(data, IT87_REG_CONFIG) & 0x80)
1430 || it87_read_value(data, IT87_REG_CHIPID) != 0x90) {
1435 platform_set_drvdata(pdev, data);
1437 mutex_init(&data->update_lock);
1439 /* Check PWM configuration */
1440 enable_pwm_interface = it87_check_pwm(dev);
1442 /* Initialize the IT87 chip */
1443 it87_init_device(pdev);
1445 /* Register sysfs hooks */
1446 err = sysfs_create_group(&dev->kobj, &it87_group);
1450 if (sio_data->beep_pin) {
1451 err = sysfs_create_group(&dev->kobj, &it87_group_beep);
1456 /* Do not create fan files for disabled fans */
1457 fan_group = it87_get_fan_group(data);
1458 fan_beep_need_rw = 1;
1459 for (i = 0; i < 5; i++) {
1460 if (!(data->has_fan & (1 << i)))
1462 err = sysfs_create_group(&dev->kobj, &fan_group[i]);
1466 if (sio_data->beep_pin) {
1467 err = sysfs_create_file(&dev->kobj,
1468 it87_attributes_fan_beep[i]);
1471 if (!fan_beep_need_rw)
1474 /* As we have a single beep enable bit for all fans,
1475 * only the first enabled fan has a writable attribute
1477 if (sysfs_chmod_file(&dev->kobj,
1478 it87_attributes_fan_beep[i],
1480 dev_dbg(dev, "chmod +w fan%d_beep failed\n",
1482 fan_beep_need_rw = 0;
1486 if (enable_pwm_interface) {
1487 for (i = 0; i < 3; i++) {
1488 if (sio_data->skip_pwm & (1 << i))
1490 err = sysfs_create_group(&dev->kobj,
1491 &it87_group_pwm[i]);
1497 if (!sio_data->skip_vid) {
1498 data->vrm = vid_which_vrm();
1499 /* VID reading from Super-I/O config space if available */
1500 data->vid = sio_data->vid_value;
1501 err = sysfs_create_group(&dev->kobj, &it87_group_vid);
1506 data->hwmon_dev = hwmon_device_register(dev);
1507 if (IS_ERR(data->hwmon_dev)) {
1508 err = PTR_ERR(data->hwmon_dev);
1515 it87_remove_files(dev);
1517 platform_set_drvdata(pdev, NULL);
1520 release_region(res->start, IT87_EC_EXTENT);
1525 static int __devexit it87_remove(struct platform_device *pdev)
1527 struct it87_data *data = platform_get_drvdata(pdev);
1529 hwmon_device_unregister(data->hwmon_dev);
1530 it87_remove_files(&pdev->dev);
1532 release_region(data->addr, IT87_EC_EXTENT);
1533 platform_set_drvdata(pdev, NULL);
1539 /* Must be called with data->update_lock held, except during initialization.
1540 We ignore the IT87 BUSY flag at this moment - it could lead to deadlocks,
1541 would slow down the IT87 access and should not be necessary. */
1542 static int it87_read_value(struct it87_data *data, u8 reg)
1544 outb_p(reg, data->addr + IT87_ADDR_REG_OFFSET);
1545 return inb_p(data->addr + IT87_DATA_REG_OFFSET);
1548 /* Must be called with data->update_lock held, except during initialization.
1549 We ignore the IT87 BUSY flag at this moment - it could lead to deadlocks,
1550 would slow down the IT87 access and should not be necessary. */
1551 static void it87_write_value(struct it87_data *data, u8 reg, u8 value)
1553 outb_p(reg, data->addr + IT87_ADDR_REG_OFFSET);
1554 outb_p(value, data->addr + IT87_DATA_REG_OFFSET);
1557 /* Return 1 if and only if the PWM interface is safe to use */
1558 static int __devinit it87_check_pwm(struct device *dev)
1560 struct it87_data *data = dev_get_drvdata(dev);
1561 /* Some BIOSes fail to correctly configure the IT87 fans. All fans off
1562 * and polarity set to active low is sign that this is the case so we
1563 * disable pwm control to protect the user. */
1564 int tmp = it87_read_value(data, IT87_REG_FAN_CTL);
1565 if ((tmp & 0x87) == 0) {
1566 if (fix_pwm_polarity) {
1567 /* The user asks us to attempt a chip reconfiguration.
1568 * This means switching to active high polarity and
1569 * inverting all fan speed values. */
1573 for (i = 0; i < 3; i++)
1574 pwm[i] = it87_read_value(data,
1577 /* If any fan is in automatic pwm mode, the polarity
1578 * might be correct, as suspicious as it seems, so we
1579 * better don't change anything (but still disable the
1580 * PWM interface). */
1581 if (!((pwm[0] | pwm[1] | pwm[2]) & 0x80)) {
1582 dev_info(dev, "Reconfiguring PWM to "
1583 "active high polarity\n");
1584 it87_write_value(data, IT87_REG_FAN_CTL,
1586 for (i = 0; i < 3; i++)
1587 it87_write_value(data,
1593 dev_info(dev, "PWM configuration is "
1594 "too broken to be fixed\n");
1597 dev_info(dev, "Detected broken BIOS "
1598 "defaults, disabling PWM interface\n");
1600 } else if (fix_pwm_polarity) {
1601 dev_info(dev, "PWM configuration looks "
1602 "sane, won't touch\n");
1608 /* Called when we have found a new IT87. */
1609 static void __devinit it87_init_device(struct platform_device *pdev)
1611 struct it87_sio_data *sio_data = pdev->dev.platform_data;
1612 struct it87_data *data = platform_get_drvdata(pdev);
1616 /* For each PWM channel:
1617 * - If it is in automatic mode, setting to manual mode should set
1618 * the fan to full speed by default.
1619 * - If it is in manual mode, we need a mapping to temperature
1620 * channels to use when later setting to automatic mode later.
1621 * Use a 1:1 mapping by default (we are clueless.)
1622 * In both cases, the value can (and should) be changed by the user
1623 * prior to switching to a different mode. */
1624 for (i = 0; i < 3; i++) {
1625 data->pwm_temp_map[i] = i;
1626 data->pwm_duty[i] = 0x7f; /* Full speed */
1629 /* Some chips seem to have default value 0xff for all limit
1630 * registers. For low voltage limits it makes no sense and triggers
1631 * alarms, so change to 0 instead. For high temperature limits, it
1632 * means -1 degree C, which surprisingly doesn't trigger an alarm,
1633 * but is still confusing, so change to 127 degrees C. */
1634 for (i = 0; i < 8; i++) {
1635 tmp = it87_read_value(data, IT87_REG_VIN_MIN(i));
1637 it87_write_value(data, IT87_REG_VIN_MIN(i), 0);
1639 for (i = 0; i < 3; i++) {
1640 tmp = it87_read_value(data, IT87_REG_TEMP_HIGH(i));
1642 it87_write_value(data, IT87_REG_TEMP_HIGH(i), 127);
1645 /* Check if temperature channels are reset manually or by some reason */
1646 tmp = it87_read_value(data, IT87_REG_TEMP_ENABLE);
1647 if ((tmp & 0x3f) == 0) {
1648 /* Temp1,Temp3=thermistor; Temp2=thermal diode */
1649 tmp = (tmp & 0xc0) | 0x2a;
1650 it87_write_value(data, IT87_REG_TEMP_ENABLE, tmp);
1654 /* Check if voltage monitors are reset manually or by some reason */
1655 tmp = it87_read_value(data, IT87_REG_VIN_ENABLE);
1656 if ((tmp & 0xff) == 0) {
1657 /* Enable all voltage monitors */
1658 it87_write_value(data, IT87_REG_VIN_ENABLE, 0xff);
1661 /* Check if tachometers are reset manually or by some reason */
1662 mask = 0x70 & ~(sio_data->skip_fan << 4);
1663 data->fan_main_ctrl = it87_read_value(data, IT87_REG_FAN_MAIN_CTRL);
1664 if ((data->fan_main_ctrl & mask) == 0) {
1665 /* Enable all fan tachometers */
1666 data->fan_main_ctrl |= mask;
1667 it87_write_value(data, IT87_REG_FAN_MAIN_CTRL,
1668 data->fan_main_ctrl);
1670 data->has_fan = (data->fan_main_ctrl >> 4) & 0x07;
1672 /* Set tachometers to 16-bit mode if needed */
1673 if (has_16bit_fans(data)) {
1674 tmp = it87_read_value(data, IT87_REG_FAN_16BIT);
1675 if (~tmp & 0x07 & data->has_fan) {
1677 "Setting fan1-3 to 16-bit mode\n");
1678 it87_write_value(data, IT87_REG_FAN_16BIT,
1681 /* IT8705F only supports three fans. */
1682 if (data->type != it87) {
1684 data->has_fan |= (1 << 3); /* fan4 enabled */
1686 data->has_fan |= (1 << 4); /* fan5 enabled */
1690 /* Fan input pins may be used for alternative functions */
1691 data->has_fan &= ~sio_data->skip_fan;
1693 /* Start monitoring */
1694 it87_write_value(data, IT87_REG_CONFIG,
1695 (it87_read_value(data, IT87_REG_CONFIG) & 0x36)
1696 | (update_vbat ? 0x41 : 0x01));
1699 static void it87_update_pwm_ctrl(struct it87_data *data, int nr)
1701 data->pwm_ctrl[nr] = it87_read_value(data, IT87_REG_PWM(nr));
1702 if (data->pwm_ctrl[nr] & 0x80) /* Automatic mode */
1703 data->pwm_temp_map[nr] = data->pwm_ctrl[nr] & 0x03;
1704 else /* Manual mode */
1705 data->pwm_duty[nr] = data->pwm_ctrl[nr] & 0x7f;
1708 static struct it87_data *it87_update_device(struct device *dev)
1710 struct it87_data *data = dev_get_drvdata(dev);
1713 mutex_lock(&data->update_lock);
1715 if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
1718 /* Cleared after each update, so reenable. Value
1719 returned by this read will be previous value */
1720 it87_write_value(data, IT87_REG_CONFIG,
1721 it87_read_value(data, IT87_REG_CONFIG) | 0x40);
1723 for (i = 0; i <= 7; i++) {
1725 it87_read_value(data, IT87_REG_VIN(i));
1727 it87_read_value(data, IT87_REG_VIN_MIN(i));
1729 it87_read_value(data, IT87_REG_VIN_MAX(i));
1731 /* in8 (battery) has no limit registers */
1732 data->in[8] = it87_read_value(data, IT87_REG_VIN(8));
1734 for (i = 0; i < 5; i++) {
1735 /* Skip disabled fans */
1736 if (!(data->has_fan & (1 << i)))
1740 it87_read_value(data, IT87_REG_FAN_MIN[i]);
1741 data->fan[i] = it87_read_value(data,
1743 /* Add high byte if in 16-bit mode */
1744 if (has_16bit_fans(data)) {
1745 data->fan[i] |= it87_read_value(data,
1746 IT87_REG_FANX[i]) << 8;
1747 data->fan_min[i] |= it87_read_value(data,
1748 IT87_REG_FANX_MIN[i]) << 8;
1751 for (i = 0; i < 3; i++) {
1753 it87_read_value(data, IT87_REG_TEMP(i));
1754 data->temp_high[i] =
1755 it87_read_value(data, IT87_REG_TEMP_HIGH(i));
1757 it87_read_value(data, IT87_REG_TEMP_LOW(i));
1760 /* Newer chips don't have clock dividers */
1761 if ((data->has_fan & 0x07) && !has_16bit_fans(data)) {
1762 i = it87_read_value(data, IT87_REG_FAN_DIV);
1763 data->fan_div[0] = i & 0x07;
1764 data->fan_div[1] = (i >> 3) & 0x07;
1765 data->fan_div[2] = (i & 0x40) ? 3 : 1;
1769 it87_read_value(data, IT87_REG_ALARM1) |
1770 (it87_read_value(data, IT87_REG_ALARM2) << 8) |
1771 (it87_read_value(data, IT87_REG_ALARM3) << 16);
1772 data->beeps = it87_read_value(data, IT87_REG_BEEP_ENABLE);
1774 data->fan_main_ctrl = it87_read_value(data,
1775 IT87_REG_FAN_MAIN_CTRL);
1776 data->fan_ctl = it87_read_value(data, IT87_REG_FAN_CTL);
1777 for (i = 0; i < 3; i++)
1778 it87_update_pwm_ctrl(data, i);
1780 data->sensor = it87_read_value(data, IT87_REG_TEMP_ENABLE);
1781 /* The 8705 does not have VID capability.
1782 The 8718 and the 8720 don't use IT87_REG_VID for the
1784 if (data->type == it8712 || data->type == it8716) {
1785 data->vid = it87_read_value(data, IT87_REG_VID);
1786 /* The older IT8712F revisions had only 5 VID pins,
1787 but we assume it is always safe to read 6 bits. */
1790 data->last_updated = jiffies;
1794 mutex_unlock(&data->update_lock);
1799 static int __init it87_device_add(unsigned short address,
1800 const struct it87_sio_data *sio_data)
1802 struct resource res = {
1803 .start = address + IT87_EC_OFFSET,
1804 .end = address + IT87_EC_OFFSET + IT87_EC_EXTENT - 1,
1806 .flags = IORESOURCE_IO,
1810 err = acpi_check_resource_conflict(&res);
1814 pdev = platform_device_alloc(DRVNAME, address);
1817 printk(KERN_ERR DRVNAME ": Device allocation failed\n");
1821 err = platform_device_add_resources(pdev, &res, 1);
1823 printk(KERN_ERR DRVNAME ": Device resource addition failed "
1825 goto exit_device_put;
1828 err = platform_device_add_data(pdev, sio_data,
1829 sizeof(struct it87_sio_data));
1831 printk(KERN_ERR DRVNAME ": Platform data allocation failed\n");
1832 goto exit_device_put;
1835 err = platform_device_add(pdev);
1837 printk(KERN_ERR DRVNAME ": Device addition failed (%d)\n",
1839 goto exit_device_put;
1845 platform_device_put(pdev);
1850 static int __init sm_it87_init(void)
1853 unsigned short isa_address = 0;
1854 struct it87_sio_data sio_data;
1856 memset(&sio_data, 0, sizeof(struct it87_sio_data));
1857 err = it87_find(&isa_address, &sio_data);
1860 err = platform_driver_register(&it87_driver);
1864 err = it87_device_add(isa_address, &sio_data);
1866 platform_driver_unregister(&it87_driver);
1873 static void __exit sm_it87_exit(void)
1875 platform_device_unregister(pdev);
1876 platform_driver_unregister(&it87_driver);
1880 MODULE_AUTHOR("Chris Gauthron, "
1881 "Jean Delvare <khali@linux-fr.org>");
1882 MODULE_DESCRIPTION("IT8705F/8712F/8716F/8718F/8720F/8726F, SiS950 driver");
1883 module_param(update_vbat, bool, 0);
1884 MODULE_PARM_DESC(update_vbat, "Update vbat if set else return powerup value");
1885 module_param(fix_pwm_polarity, bool, 0);
1886 MODULE_PARM_DESC(fix_pwm_polarity,
1887 "Force PWM polarity to active high (DANGEROUS)");
1888 MODULE_LICENSE("GPL");
1890 module_init(sm_it87_init);
1891 module_exit(sm_it87_exit);