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 * IT8721F Super I/O chip w/LPC interface
19 * IT8726F Super I/O chip w/LPC interface
20 * IT8728F Super I/O chip w/LPC interface
21 * IT8758E Super I/O chip w/LPC interface
22 * IT8782F Super I/O chip w/LPC interface
23 * IT8783E/F Super I/O chip w/LPC interface
24 * Sis950 A clone of the IT8705F
26 * Copyright (C) 2001 Chris Gauthron
27 * Copyright (C) 2005-2010 Jean Delvare <khali@linux-fr.org>
29 * This program is free software; you can redistribute it and/or modify
30 * it under the terms of the GNU General Public License as published by
31 * the Free Software Foundation; either version 2 of the License, or
32 * (at your option) any later version.
34 * This program is distributed in the hope that it will be useful,
35 * but WITHOUT ANY WARRANTY; without even the implied warranty of
36 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
37 * GNU General Public License for more details.
39 * You should have received a copy of the GNU General Public License
40 * along with this program; if not, write to the Free Software
41 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
44 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
46 #include <linux/module.h>
47 #include <linux/init.h>
48 #include <linux/slab.h>
49 #include <linux/jiffies.h>
50 #include <linux/platform_device.h>
51 #include <linux/hwmon.h>
52 #include <linux/hwmon-sysfs.h>
53 #include <linux/hwmon-vid.h>
54 #include <linux/err.h>
55 #include <linux/mutex.h>
56 #include <linux/sysfs.h>
57 #include <linux/string.h>
58 #include <linux/dmi.h>
59 #include <linux/acpi.h>
61 #include <linux/version.h>
64 #define DRVNAME "it87"
66 enum chips { it87, it8712, it8716, it8718, it8720, it8721, it8728, it8782,
69 static unsigned short force_id;
70 module_param(force_id, ushort, 0);
71 MODULE_PARM_DESC(force_id, "Override the detected device ID");
73 static struct platform_device *pdev;
75 #define REG 0x2e /* The register to read/write */
76 #define DEV 0x07 /* Register: Logical device select */
77 #define VAL 0x2f /* The value to read/write */
78 #define PME 0x04 /* The device with the fan registers in it */
80 /* The device with the IT8718F/IT8720F VID value in it */
83 #define DEVID 0x20 /* Register: Device ID */
84 #define DEVREV 0x22 /* Register: Device Revision */
86 static inline int superio_inb(int reg)
92 static inline void superio_outb(int reg, int val)
98 static int superio_inw(int reg)
108 static inline void superio_select(int ldn)
114 static inline int superio_enter(void)
117 * Try to reserve REG and REG + 1 for exclusive access.
119 if (!request_muxed_region(REG, 2, DRVNAME))
129 static inline void superio_exit(void)
133 release_region(REG, 2);
136 /* Logical device 4 registers */
137 #define IT8712F_DEVID 0x8712
138 #define IT8705F_DEVID 0x8705
139 #define IT8716F_DEVID 0x8716
140 #define IT8718F_DEVID 0x8718
141 #define IT8720F_DEVID 0x8720
142 #define IT8721F_DEVID 0x8721
143 #define IT8726F_DEVID 0x8726
144 #define IT8728F_DEVID 0x8728
145 #define IT8782F_DEVID 0x8782
146 #define IT8783E_DEVID 0x8783
147 #define IT87_ACT_REG 0x30
148 #define IT87_BASE_REG 0x60
150 /* Logical device 7 registers (IT8712F and later) */
151 #define IT87_SIO_GPIO1_REG 0x25
152 #define IT87_SIO_GPIO3_REG 0x27
153 #define IT87_SIO_GPIO5_REG 0x29
154 #define IT87_SIO_PINX1_REG 0x2a /* Pin selection */
155 #define IT87_SIO_PINX2_REG 0x2c /* Pin selection */
156 #define IT87_SIO_SPI_REG 0xef /* SPI function pin select */
157 #define IT87_SIO_VID_REG 0xfc /* VID value */
158 #define IT87_SIO_BEEP_PIN_REG 0xf6 /* Beep pin mapping */
160 /* Update battery voltage after every reading if true */
161 static bool update_vbat;
163 /* Not all BIOSes properly configure the PWM registers */
164 static bool fix_pwm_polarity;
166 /* Many IT87 constants specified below */
168 /* Length of ISA address segment */
169 #define IT87_EXTENT 8
171 /* Length of ISA address segment for Environmental Controller */
172 #define IT87_EC_EXTENT 2
174 /* Offset of EC registers from ISA base address */
175 #define IT87_EC_OFFSET 5
177 /* Where are the ISA address/data registers relative to the EC base address */
178 #define IT87_ADDR_REG_OFFSET 0
179 #define IT87_DATA_REG_OFFSET 1
181 /*----- The IT87 registers -----*/
183 #define IT87_REG_CONFIG 0x00
185 #define IT87_REG_ALARM1 0x01
186 #define IT87_REG_ALARM2 0x02
187 #define IT87_REG_ALARM3 0x03
190 * The IT8718F and IT8720F have the VID value in a different register, in
191 * Super-I/O configuration space.
193 #define IT87_REG_VID 0x0a
195 * The IT8705F and IT8712F earlier than revision 0x08 use register 0x0b
196 * for fan divisors. Later IT8712F revisions must use 16-bit tachometer
199 #define IT87_REG_FAN_DIV 0x0b
200 #define IT87_REG_FAN_16BIT 0x0c
202 /* Monitors: 9 voltage (0 to 7, battery), 3 temp (1 to 3), 3 fan (1 to 3) */
204 static const u8 IT87_REG_FAN[] = { 0x0d, 0x0e, 0x0f, 0x80, 0x82 };
205 static const u8 IT87_REG_FAN_MIN[] = { 0x10, 0x11, 0x12, 0x84, 0x86 };
206 static const u8 IT87_REG_FANX[] = { 0x18, 0x19, 0x1a, 0x81, 0x83 };
207 static const u8 IT87_REG_FANX_MIN[] = { 0x1b, 0x1c, 0x1d, 0x85, 0x87 };
208 #define IT87_REG_FAN_MAIN_CTRL 0x13
209 #define IT87_REG_FAN_CTL 0x14
210 #define IT87_REG_PWM(nr) (0x15 + (nr))
211 #define IT87_REG_PWM_DUTY(nr) (0x63 + (nr) * 8)
213 #define IT87_REG_VIN(nr) (0x20 + (nr))
214 #define IT87_REG_TEMP(nr) (0x29 + (nr))
216 #define IT87_REG_VIN_MAX(nr) (0x30 + (nr) * 2)
217 #define IT87_REG_VIN_MIN(nr) (0x31 + (nr) * 2)
218 #define IT87_REG_TEMP_HIGH(nr) (0x40 + (nr) * 2)
219 #define IT87_REG_TEMP_LOW(nr) (0x41 + (nr) * 2)
221 #define IT87_REG_VIN_ENABLE 0x50
222 #define IT87_REG_TEMP_ENABLE 0x51
223 #define IT87_REG_TEMP_EXTRA 0x55
224 #define IT87_REG_BEEP_ENABLE 0x5c
226 #define IT87_REG_CHIPID 0x58
228 #define IT87_REG_AUTO_TEMP(nr, i) (0x60 + (nr) * 8 + (i))
229 #define IT87_REG_AUTO_PWM(nr, i) (0x65 + (nr) * 8 + (i))
232 struct it87_sio_data {
234 /* Values read from Super-I/O config space */
238 u8 internal; /* Internal sensors can be labeled */
239 /* Features skipped based on config or DMI */
248 * For each registered chip, we need to keep some data in memory.
249 * The structure is dynamically allocated.
252 struct device *hwmon_dev;
258 struct mutex update_lock;
259 char valid; /* !=0 if following fields are valid */
260 unsigned long last_updated; /* In jiffies */
262 u16 in_scaled; /* Internal voltage sensors are scaled */
263 u8 in[9]; /* Register value */
264 u8 in_max[8]; /* Register value */
265 u8 in_min[8]; /* Register value */
266 u8 has_fan; /* Bitfield, fans enabled */
267 u16 fan[5]; /* Register values, possibly combined */
268 u16 fan_min[5]; /* Register values, possibly combined */
269 u8 has_temp; /* Bitfield, temp sensors enabled */
270 s8 temp[3]; /* Register value */
271 s8 temp_high[3]; /* Register value */
272 s8 temp_low[3]; /* Register value */
273 u8 sensor; /* Register value */
274 u8 fan_div[3]; /* Register encoding, shifted right */
275 u8 vid; /* Register encoding, combined */
277 u32 alarms; /* Register encoding, combined */
278 u8 beeps; /* Register encoding */
279 u8 fan_main_ctrl; /* Register value */
280 u8 fan_ctl; /* Register value */
283 * The following 3 arrays correspond to the same registers up to
284 * the IT8720F. The meaning of bits 6-0 depends on the value of bit
285 * 7, and we want to preserve settings on mode changes, so we have
286 * to track all values separately.
287 * Starting with the IT8721F, the manual PWM duty cycles are stored
288 * in separate registers (8-bit values), so the separate tracking
289 * is no longer needed, but it is still done to keep the driver
292 u8 pwm_ctrl[3]; /* Register value */
293 u8 pwm_duty[3]; /* Manual PWM value set by user */
294 u8 pwm_temp_map[3]; /* PWM to temp. chan. mapping (bits 1-0) */
296 /* Automatic fan speed control registers */
297 u8 auto_pwm[3][4]; /* [nr][3] is hard-coded */
298 s8 auto_temp[3][5]; /* [nr][0] is point1_temp_hyst */
301 static inline int has_12mv_adc(const struct it87_data *data)
304 * IT8721F and later have a 12 mV ADC, also with internal scaling
305 * on selected inputs.
307 return data->type == it8721
308 || data->type == it8728;
311 static inline int has_newer_autopwm(const struct it87_data *data)
314 * IT8721F and later have separate registers for the temperature
315 * mapping and the manual duty cycle.
317 return data->type == it8721
318 || data->type == it8728;
321 static int adc_lsb(const struct it87_data *data, int nr)
323 int lsb = has_12mv_adc(data) ? 12 : 16;
324 if (data->in_scaled & (1 << nr))
329 static u8 in_to_reg(const struct it87_data *data, int nr, long val)
331 val = DIV_ROUND_CLOSEST(val, adc_lsb(data, nr));
332 return SENSORS_LIMIT(val, 0, 255);
335 static int in_from_reg(const struct it87_data *data, int nr, int val)
337 return val * adc_lsb(data, nr);
340 static inline u8 FAN_TO_REG(long rpm, int div)
344 rpm = SENSORS_LIMIT(rpm, 1, 1000000);
345 return SENSORS_LIMIT((1350000 + rpm * div / 2) / (rpm * div), 1,
349 static inline u16 FAN16_TO_REG(long rpm)
353 return SENSORS_LIMIT((1350000 + rpm) / (rpm * 2), 1, 0xfffe);
356 #define FAN_FROM_REG(val, div) ((val) == 0 ? -1 : (val) == 255 ? 0 : \
357 1350000 / ((val) * (div)))
358 /* The divider is fixed to 2 in 16-bit mode */
359 #define FAN16_FROM_REG(val) ((val) == 0 ? -1 : (val) == 0xffff ? 0 : \
360 1350000 / ((val) * 2))
362 #define TEMP_TO_REG(val) (SENSORS_LIMIT(((val) < 0 ? (((val) - 500) / 1000) : \
363 ((val) + 500) / 1000), -128, 127))
364 #define TEMP_FROM_REG(val) ((val) * 1000)
366 static u8 pwm_to_reg(const struct it87_data *data, long val)
368 if (has_newer_autopwm(data))
374 static int pwm_from_reg(const struct it87_data *data, u8 reg)
376 if (has_newer_autopwm(data))
379 return (reg & 0x7f) << 1;
383 static int DIV_TO_REG(int val)
386 while (answer < 7 && (val >>= 1))
390 #define DIV_FROM_REG(val) (1 << (val))
392 static const unsigned int pwm_freq[8] = {
403 static inline int has_16bit_fans(const struct it87_data *data)
406 * IT8705F Datasheet 0.4.1, 3h == Version G.
407 * IT8712F Datasheet 0.9.1, section 8.3.5 indicates 8h == Version J.
408 * These are the first revisions with 16-bit tachometer support.
410 return (data->type == it87 && data->revision >= 0x03)
411 || (data->type == it8712 && data->revision >= 0x08)
412 || data->type == it8716
413 || data->type == it8718
414 || data->type == it8720
415 || data->type == it8721
416 || data->type == it8728
417 || data->type == it8782
418 || data->type == it8783;
421 static inline int has_old_autopwm(const struct it87_data *data)
424 * The old automatic fan speed control interface is implemented
425 * by IT8705F chips up to revision F and IT8712F chips up to
428 return (data->type == it87 && data->revision < 0x03)
429 || (data->type == it8712 && data->revision < 0x08);
432 static int it87_probe(struct platform_device *pdev);
433 static int __devexit it87_remove(struct platform_device *pdev);
435 static int it87_read_value(struct it87_data *data, u8 reg);
436 static void it87_write_value(struct it87_data *data, u8 reg, u8 value);
437 static struct it87_data *it87_update_device(struct device *dev);
438 static int it87_check_pwm(struct device *dev);
439 static void it87_init_device(struct platform_device *pdev);
442 static struct platform_driver it87_driver = {
444 .owner = THIS_MODULE,
448 .remove = __devexit_p(it87_remove),
451 static ssize_t show_in(struct device *dev, struct device_attribute *attr,
454 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
455 int nr = sensor_attr->index;
457 struct it87_data *data = it87_update_device(dev);
458 return sprintf(buf, "%d\n", in_from_reg(data, nr, data->in[nr]));
461 static ssize_t show_in_min(struct device *dev, struct device_attribute *attr,
464 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
465 int nr = sensor_attr->index;
467 struct it87_data *data = it87_update_device(dev);
468 return sprintf(buf, "%d\n", in_from_reg(data, nr, data->in_min[nr]));
471 static ssize_t show_in_max(struct device *dev, struct device_attribute *attr,
474 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
475 int nr = sensor_attr->index;
477 struct it87_data *data = it87_update_device(dev);
478 return sprintf(buf, "%d\n", in_from_reg(data, nr, data->in_max[nr]));
481 static ssize_t set_in_min(struct device *dev, struct device_attribute *attr,
482 const char *buf, size_t count)
484 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
485 int nr = sensor_attr->index;
487 struct it87_data *data = dev_get_drvdata(dev);
490 if (kstrtoul(buf, 10, &val) < 0)
493 mutex_lock(&data->update_lock);
494 data->in_min[nr] = in_to_reg(data, nr, val);
495 it87_write_value(data, IT87_REG_VIN_MIN(nr),
497 mutex_unlock(&data->update_lock);
500 static ssize_t set_in_max(struct device *dev, struct device_attribute *attr,
501 const char *buf, size_t count)
503 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
504 int nr = sensor_attr->index;
506 struct it87_data *data = dev_get_drvdata(dev);
509 if (kstrtoul(buf, 10, &val) < 0)
512 mutex_lock(&data->update_lock);
513 data->in_max[nr] = in_to_reg(data, nr, val);
514 it87_write_value(data, IT87_REG_VIN_MAX(nr),
516 mutex_unlock(&data->update_lock);
520 #define show_in_offset(offset) \
521 static SENSOR_DEVICE_ATTR(in##offset##_input, S_IRUGO, \
522 show_in, NULL, offset);
524 #define limit_in_offset(offset) \
525 static SENSOR_DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \
526 show_in_min, set_in_min, offset); \
527 static SENSOR_DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \
528 show_in_max, set_in_max, offset);
549 static ssize_t show_temp(struct device *dev, struct device_attribute *attr,
552 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
553 int nr = sensor_attr->index;
555 struct it87_data *data = it87_update_device(dev);
556 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[nr]));
558 static ssize_t show_temp_max(struct device *dev, struct device_attribute *attr,
561 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
562 int nr = sensor_attr->index;
564 struct it87_data *data = it87_update_device(dev);
565 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_high[nr]));
567 static ssize_t show_temp_min(struct device *dev, struct device_attribute *attr,
570 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
571 int nr = sensor_attr->index;
573 struct it87_data *data = it87_update_device(dev);
574 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_low[nr]));
576 static ssize_t set_temp_max(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);
585 if (kstrtol(buf, 10, &val) < 0)
588 mutex_lock(&data->update_lock);
589 data->temp_high[nr] = TEMP_TO_REG(val);
590 it87_write_value(data, IT87_REG_TEMP_HIGH(nr), data->temp_high[nr]);
591 mutex_unlock(&data->update_lock);
594 static ssize_t set_temp_min(struct device *dev, struct device_attribute *attr,
595 const char *buf, size_t count)
597 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
598 int nr = sensor_attr->index;
600 struct it87_data *data = dev_get_drvdata(dev);
603 if (kstrtol(buf, 10, &val) < 0)
606 mutex_lock(&data->update_lock);
607 data->temp_low[nr] = TEMP_TO_REG(val);
608 it87_write_value(data, IT87_REG_TEMP_LOW(nr), data->temp_low[nr]);
609 mutex_unlock(&data->update_lock);
612 #define show_temp_offset(offset) \
613 static SENSOR_DEVICE_ATTR(temp##offset##_input, S_IRUGO, \
614 show_temp, NULL, offset - 1); \
615 static SENSOR_DEVICE_ATTR(temp##offset##_max, S_IRUGO | S_IWUSR, \
616 show_temp_max, set_temp_max, offset - 1); \
617 static SENSOR_DEVICE_ATTR(temp##offset##_min, S_IRUGO | S_IWUSR, \
618 show_temp_min, set_temp_min, offset - 1);
624 static ssize_t show_sensor(struct device *dev, struct device_attribute *attr,
627 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
628 int nr = sensor_attr->index;
629 struct it87_data *data = it87_update_device(dev);
630 u8 reg = data->sensor; /* In case value is updated while used */
633 return sprintf(buf, "3\n"); /* thermal diode */
635 return sprintf(buf, "4\n"); /* thermistor */
636 return sprintf(buf, "0\n"); /* disabled */
638 static ssize_t set_sensor(struct device *dev, struct device_attribute *attr,
639 const char *buf, size_t count)
641 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
642 int nr = sensor_attr->index;
644 struct it87_data *data = dev_get_drvdata(dev);
648 if (kstrtol(buf, 10, &val) < 0)
651 reg = it87_read_value(data, IT87_REG_TEMP_ENABLE);
654 if (val == 2) { /* backwards compatibility */
655 dev_warn(dev, "Sensor type 2 is deprecated, please use 4 "
659 /* 3 = thermal diode; 4 = thermistor; 0 = disabled */
667 mutex_lock(&data->update_lock);
669 it87_write_value(data, IT87_REG_TEMP_ENABLE, data->sensor);
670 data->valid = 0; /* Force cache refresh */
671 mutex_unlock(&data->update_lock);
674 #define show_sensor_offset(offset) \
675 static SENSOR_DEVICE_ATTR(temp##offset##_type, S_IRUGO | S_IWUSR, \
676 show_sensor, set_sensor, offset - 1);
678 show_sensor_offset(1);
679 show_sensor_offset(2);
680 show_sensor_offset(3);
684 static int pwm_mode(const struct it87_data *data, int nr)
686 int ctrl = data->fan_main_ctrl & (1 << nr);
688 if (ctrl == 0) /* Full speed */
690 if (data->pwm_ctrl[nr] & 0x80) /* Automatic mode */
692 else /* Manual mode */
696 static ssize_t show_fan(struct device *dev, struct device_attribute *attr,
699 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
700 int nr = sensor_attr->index;
702 struct it87_data *data = it87_update_device(dev);
703 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[nr],
704 DIV_FROM_REG(data->fan_div[nr])));
706 static ssize_t show_fan_min(struct device *dev, struct device_attribute *attr,
709 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
710 int nr = sensor_attr->index;
712 struct it87_data *data = it87_update_device(dev);
713 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[nr],
714 DIV_FROM_REG(data->fan_div[nr])));
716 static ssize_t show_fan_div(struct device *dev, struct device_attribute *attr,
719 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
720 int nr = sensor_attr->index;
722 struct it87_data *data = it87_update_device(dev);
723 return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr]));
725 static ssize_t show_pwm_enable(struct device *dev,
726 struct device_attribute *attr, char *buf)
728 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
729 int nr = sensor_attr->index;
731 struct it87_data *data = it87_update_device(dev);
732 return sprintf(buf, "%d\n", pwm_mode(data, nr));
734 static ssize_t show_pwm(struct device *dev, struct device_attribute *attr,
737 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
738 int nr = sensor_attr->index;
740 struct it87_data *data = it87_update_device(dev);
741 return sprintf(buf, "%d\n",
742 pwm_from_reg(data, data->pwm_duty[nr]));
744 static ssize_t show_pwm_freq(struct device *dev, struct device_attribute *attr,
747 struct it87_data *data = it87_update_device(dev);
748 int index = (data->fan_ctl >> 4) & 0x07;
750 return sprintf(buf, "%u\n", pwm_freq[index]);
752 static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr,
753 const char *buf, size_t count)
755 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
756 int nr = sensor_attr->index;
758 struct it87_data *data = dev_get_drvdata(dev);
762 if (kstrtol(buf, 10, &val) < 0)
765 mutex_lock(&data->update_lock);
766 reg = it87_read_value(data, IT87_REG_FAN_DIV);
769 data->fan_div[nr] = reg & 0x07;
772 data->fan_div[nr] = (reg >> 3) & 0x07;
775 data->fan_div[nr] = (reg & 0x40) ? 3 : 1;
779 data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr]));
780 it87_write_value(data, IT87_REG_FAN_MIN[nr], data->fan_min[nr]);
781 mutex_unlock(&data->update_lock);
784 static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr,
785 const char *buf, size_t count)
787 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
788 int nr = sensor_attr->index;
790 struct it87_data *data = dev_get_drvdata(dev);
795 if (kstrtoul(buf, 10, &val) < 0)
798 mutex_lock(&data->update_lock);
799 old = it87_read_value(data, IT87_REG_FAN_DIV);
801 /* Save fan min limit */
802 min = FAN_FROM_REG(data->fan_min[nr], DIV_FROM_REG(data->fan_div[nr]));
807 data->fan_div[nr] = DIV_TO_REG(val);
811 data->fan_div[nr] = 1;
813 data->fan_div[nr] = 3;
816 val |= (data->fan_div[0] & 0x07);
817 val |= (data->fan_div[1] & 0x07) << 3;
818 if (data->fan_div[2] == 3)
820 it87_write_value(data, IT87_REG_FAN_DIV, val);
822 /* Restore fan min limit */
823 data->fan_min[nr] = FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr]));
824 it87_write_value(data, IT87_REG_FAN_MIN[nr], data->fan_min[nr]);
826 mutex_unlock(&data->update_lock);
830 /* Returns 0 if OK, -EINVAL otherwise */
831 static int check_trip_points(struct device *dev, int nr)
833 const struct it87_data *data = dev_get_drvdata(dev);
836 if (has_old_autopwm(data)) {
837 for (i = 0; i < 3; i++) {
838 if (data->auto_temp[nr][i] > data->auto_temp[nr][i + 1])
841 for (i = 0; i < 2; i++) {
842 if (data->auto_pwm[nr][i] > data->auto_pwm[nr][i + 1])
848 dev_err(dev, "Inconsistent trip points, not switching to "
850 dev_err(dev, "Adjust the trip points and try again\n");
855 static ssize_t set_pwm_enable(struct device *dev,
856 struct device_attribute *attr, const char *buf, size_t count)
858 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
859 int nr = sensor_attr->index;
861 struct it87_data *data = dev_get_drvdata(dev);
864 if (kstrtol(buf, 10, &val) < 0 || val < 0 || val > 2)
867 /* Check trip points before switching to automatic mode */
869 if (check_trip_points(dev, nr) < 0)
873 mutex_lock(&data->update_lock);
877 /* make sure the fan is on when in on/off mode */
878 tmp = it87_read_value(data, IT87_REG_FAN_CTL);
879 it87_write_value(data, IT87_REG_FAN_CTL, tmp | (1 << nr));
880 /* set on/off mode */
881 data->fan_main_ctrl &= ~(1 << nr);
882 it87_write_value(data, IT87_REG_FAN_MAIN_CTRL,
883 data->fan_main_ctrl);
885 if (val == 1) /* Manual mode */
886 data->pwm_ctrl[nr] = has_newer_autopwm(data) ?
887 data->pwm_temp_map[nr] :
889 else /* Automatic mode */
890 data->pwm_ctrl[nr] = 0x80 | data->pwm_temp_map[nr];
891 it87_write_value(data, IT87_REG_PWM(nr), data->pwm_ctrl[nr]);
892 /* set SmartGuardian mode */
893 data->fan_main_ctrl |= (1 << nr);
894 it87_write_value(data, IT87_REG_FAN_MAIN_CTRL,
895 data->fan_main_ctrl);
898 mutex_unlock(&data->update_lock);
901 static ssize_t set_pwm(struct device *dev, struct device_attribute *attr,
902 const char *buf, size_t count)
904 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
905 int nr = sensor_attr->index;
907 struct it87_data *data = dev_get_drvdata(dev);
910 if (kstrtol(buf, 10, &val) < 0 || val < 0 || val > 255)
913 mutex_lock(&data->update_lock);
914 if (has_newer_autopwm(data)) {
916 * If we are in automatic mode, the PWM duty cycle register
917 * is read-only so we can't write the value.
919 if (data->pwm_ctrl[nr] & 0x80) {
920 mutex_unlock(&data->update_lock);
923 data->pwm_duty[nr] = pwm_to_reg(data, val);
924 it87_write_value(data, IT87_REG_PWM_DUTY(nr),
927 data->pwm_duty[nr] = pwm_to_reg(data, val);
929 * If we are in manual mode, write the duty cycle immediately;
930 * otherwise, just store it for later use.
932 if (!(data->pwm_ctrl[nr] & 0x80)) {
933 data->pwm_ctrl[nr] = data->pwm_duty[nr];
934 it87_write_value(data, IT87_REG_PWM(nr),
938 mutex_unlock(&data->update_lock);
941 static ssize_t set_pwm_freq(struct device *dev,
942 struct device_attribute *attr, const char *buf, size_t count)
944 struct it87_data *data = dev_get_drvdata(dev);
948 if (kstrtoul(buf, 10, &val) < 0)
951 /* Search for the nearest available frequency */
952 for (i = 0; i < 7; i++) {
953 if (val > (pwm_freq[i] + pwm_freq[i+1]) / 2)
957 mutex_lock(&data->update_lock);
958 data->fan_ctl = it87_read_value(data, IT87_REG_FAN_CTL) & 0x8f;
959 data->fan_ctl |= i << 4;
960 it87_write_value(data, IT87_REG_FAN_CTL, data->fan_ctl);
961 mutex_unlock(&data->update_lock);
965 static ssize_t show_pwm_temp_map(struct device *dev,
966 struct device_attribute *attr, char *buf)
968 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
969 int nr = sensor_attr->index;
971 struct it87_data *data = it87_update_device(dev);
974 if (data->pwm_temp_map[nr] < 3)
975 map = 1 << data->pwm_temp_map[nr];
977 map = 0; /* Should never happen */
978 return sprintf(buf, "%d\n", map);
980 static ssize_t set_pwm_temp_map(struct device *dev,
981 struct device_attribute *attr, const char *buf, size_t count)
983 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
984 int nr = sensor_attr->index;
986 struct it87_data *data = dev_get_drvdata(dev);
991 * This check can go away if we ever support automatic fan speed
992 * control on newer chips.
994 if (!has_old_autopwm(data)) {
995 dev_notice(dev, "Mapping change disabled for safety reasons\n");
999 if (kstrtol(buf, 10, &val) < 0)
1016 mutex_lock(&data->update_lock);
1017 data->pwm_temp_map[nr] = reg;
1019 * If we are in automatic mode, write the temp mapping immediately;
1020 * otherwise, just store it for later use.
1022 if (data->pwm_ctrl[nr] & 0x80) {
1023 data->pwm_ctrl[nr] = 0x80 | data->pwm_temp_map[nr];
1024 it87_write_value(data, IT87_REG_PWM(nr), data->pwm_ctrl[nr]);
1026 mutex_unlock(&data->update_lock);
1030 static ssize_t show_auto_pwm(struct device *dev,
1031 struct device_attribute *attr, char *buf)
1033 struct it87_data *data = it87_update_device(dev);
1034 struct sensor_device_attribute_2 *sensor_attr =
1035 to_sensor_dev_attr_2(attr);
1036 int nr = sensor_attr->nr;
1037 int point = sensor_attr->index;
1039 return sprintf(buf, "%d\n",
1040 pwm_from_reg(data, data->auto_pwm[nr][point]));
1043 static ssize_t set_auto_pwm(struct device *dev,
1044 struct device_attribute *attr, const char *buf, size_t count)
1046 struct it87_data *data = dev_get_drvdata(dev);
1047 struct sensor_device_attribute_2 *sensor_attr =
1048 to_sensor_dev_attr_2(attr);
1049 int nr = sensor_attr->nr;
1050 int point = sensor_attr->index;
1053 if (kstrtol(buf, 10, &val) < 0 || val < 0 || val > 255)
1056 mutex_lock(&data->update_lock);
1057 data->auto_pwm[nr][point] = pwm_to_reg(data, val);
1058 it87_write_value(data, IT87_REG_AUTO_PWM(nr, point),
1059 data->auto_pwm[nr][point]);
1060 mutex_unlock(&data->update_lock);
1064 static ssize_t show_auto_temp(struct device *dev,
1065 struct device_attribute *attr, char *buf)
1067 struct it87_data *data = it87_update_device(dev);
1068 struct sensor_device_attribute_2 *sensor_attr =
1069 to_sensor_dev_attr_2(attr);
1070 int nr = sensor_attr->nr;
1071 int point = sensor_attr->index;
1073 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->auto_temp[nr][point]));
1076 static ssize_t set_auto_temp(struct device *dev,
1077 struct device_attribute *attr, const char *buf, size_t count)
1079 struct it87_data *data = dev_get_drvdata(dev);
1080 struct sensor_device_attribute_2 *sensor_attr =
1081 to_sensor_dev_attr_2(attr);
1082 int nr = sensor_attr->nr;
1083 int point = sensor_attr->index;
1086 if (kstrtol(buf, 10, &val) < 0 || val < -128000 || val > 127000)
1089 mutex_lock(&data->update_lock);
1090 data->auto_temp[nr][point] = TEMP_TO_REG(val);
1091 it87_write_value(data, IT87_REG_AUTO_TEMP(nr, point),
1092 data->auto_temp[nr][point]);
1093 mutex_unlock(&data->update_lock);
1097 #define show_fan_offset(offset) \
1098 static SENSOR_DEVICE_ATTR(fan##offset##_input, S_IRUGO, \
1099 show_fan, NULL, offset - 1); \
1100 static SENSOR_DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \
1101 show_fan_min, set_fan_min, offset - 1); \
1102 static SENSOR_DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR, \
1103 show_fan_div, set_fan_div, offset - 1);
1109 #define show_pwm_offset(offset) \
1110 static SENSOR_DEVICE_ATTR(pwm##offset##_enable, S_IRUGO | S_IWUSR, \
1111 show_pwm_enable, set_pwm_enable, offset - 1); \
1112 static SENSOR_DEVICE_ATTR(pwm##offset, S_IRUGO | S_IWUSR, \
1113 show_pwm, set_pwm, offset - 1); \
1114 static DEVICE_ATTR(pwm##offset##_freq, \
1115 (offset == 1 ? S_IRUGO | S_IWUSR : S_IRUGO), \
1116 show_pwm_freq, (offset == 1 ? set_pwm_freq : NULL)); \
1117 static SENSOR_DEVICE_ATTR(pwm##offset##_auto_channels_temp, \
1118 S_IRUGO | S_IWUSR, show_pwm_temp_map, set_pwm_temp_map, \
1120 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point1_pwm, \
1121 S_IRUGO | S_IWUSR, show_auto_pwm, set_auto_pwm, \
1123 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point2_pwm, \
1124 S_IRUGO | S_IWUSR, show_auto_pwm, set_auto_pwm, \
1126 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point3_pwm, \
1127 S_IRUGO | S_IWUSR, show_auto_pwm, set_auto_pwm, \
1129 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point4_pwm, \
1130 S_IRUGO, show_auto_pwm, NULL, offset - 1, 3); \
1131 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point1_temp, \
1132 S_IRUGO | S_IWUSR, show_auto_temp, set_auto_temp, \
1134 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point1_temp_hyst, \
1135 S_IRUGO | S_IWUSR, show_auto_temp, set_auto_temp, \
1137 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point2_temp, \
1138 S_IRUGO | S_IWUSR, show_auto_temp, set_auto_temp, \
1140 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point3_temp, \
1141 S_IRUGO | S_IWUSR, show_auto_temp, set_auto_temp, \
1143 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point4_temp, \
1144 S_IRUGO | S_IWUSR, show_auto_temp, set_auto_temp, \
1151 /* A different set of callbacks for 16-bit fans */
1152 static ssize_t show_fan16(struct device *dev, struct device_attribute *attr,
1155 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
1156 int nr = sensor_attr->index;
1157 struct it87_data *data = it87_update_device(dev);
1158 return sprintf(buf, "%d\n", FAN16_FROM_REG(data->fan[nr]));
1161 static ssize_t show_fan16_min(struct device *dev, struct device_attribute *attr,
1164 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
1165 int nr = sensor_attr->index;
1166 struct it87_data *data = it87_update_device(dev);
1167 return sprintf(buf, "%d\n", FAN16_FROM_REG(data->fan_min[nr]));
1170 static ssize_t set_fan16_min(struct device *dev, struct device_attribute *attr,
1171 const char *buf, size_t count)
1173 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
1174 int nr = sensor_attr->index;
1175 struct it87_data *data = dev_get_drvdata(dev);
1178 if (kstrtol(buf, 10, &val) < 0)
1181 mutex_lock(&data->update_lock);
1182 data->fan_min[nr] = FAN16_TO_REG(val);
1183 it87_write_value(data, IT87_REG_FAN_MIN[nr],
1184 data->fan_min[nr] & 0xff);
1185 it87_write_value(data, IT87_REG_FANX_MIN[nr],
1186 data->fan_min[nr] >> 8);
1187 mutex_unlock(&data->update_lock);
1192 * We want to use the same sysfs file names as 8-bit fans, but we need
1193 * different variable names, so we have to use SENSOR_ATTR instead of
1194 * SENSOR_DEVICE_ATTR.
1196 #define show_fan16_offset(offset) \
1197 static struct sensor_device_attribute sensor_dev_attr_fan##offset##_input16 \
1198 = SENSOR_ATTR(fan##offset##_input, S_IRUGO, \
1199 show_fan16, NULL, offset - 1); \
1200 static struct sensor_device_attribute sensor_dev_attr_fan##offset##_min16 \
1201 = SENSOR_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \
1202 show_fan16_min, set_fan16_min, offset - 1)
1204 show_fan16_offset(1);
1205 show_fan16_offset(2);
1206 show_fan16_offset(3);
1207 show_fan16_offset(4);
1208 show_fan16_offset(5);
1211 static ssize_t show_alarms(struct device *dev, struct device_attribute *attr,
1214 struct it87_data *data = it87_update_device(dev);
1215 return sprintf(buf, "%u\n", data->alarms);
1217 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
1219 static ssize_t show_alarm(struct device *dev, struct device_attribute *attr,
1222 int bitnr = to_sensor_dev_attr(attr)->index;
1223 struct it87_data *data = it87_update_device(dev);
1224 return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1);
1227 static ssize_t clear_intrusion(struct device *dev, struct device_attribute
1228 *attr, const char *buf, size_t count)
1230 struct it87_data *data = dev_get_drvdata(dev);
1234 if (kstrtol(buf, 10, &val) < 0 || val != 0)
1237 mutex_lock(&data->update_lock);
1238 config = it87_read_value(data, IT87_REG_CONFIG);
1243 it87_write_value(data, IT87_REG_CONFIG, config);
1244 /* Invalidate cache to force re-read */
1247 mutex_unlock(&data->update_lock);
1252 static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 8);
1253 static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 9);
1254 static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 10);
1255 static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 11);
1256 static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 12);
1257 static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 13);
1258 static SENSOR_DEVICE_ATTR(in6_alarm, S_IRUGO, show_alarm, NULL, 14);
1259 static SENSOR_DEVICE_ATTR(in7_alarm, S_IRUGO, show_alarm, NULL, 15);
1260 static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 0);
1261 static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 1);
1262 static SENSOR_DEVICE_ATTR(fan3_alarm, S_IRUGO, show_alarm, NULL, 2);
1263 static SENSOR_DEVICE_ATTR(fan4_alarm, S_IRUGO, show_alarm, NULL, 3);
1264 static SENSOR_DEVICE_ATTR(fan5_alarm, S_IRUGO, show_alarm, NULL, 6);
1265 static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 16);
1266 static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 17);
1267 static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL, 18);
1268 static SENSOR_DEVICE_ATTR(intrusion0_alarm, S_IRUGO | S_IWUSR,
1269 show_alarm, clear_intrusion, 4);
1271 static ssize_t show_beep(struct device *dev, struct device_attribute *attr,
1274 int bitnr = to_sensor_dev_attr(attr)->index;
1275 struct it87_data *data = it87_update_device(dev);
1276 return sprintf(buf, "%u\n", (data->beeps >> bitnr) & 1);
1278 static ssize_t set_beep(struct device *dev, struct device_attribute *attr,
1279 const char *buf, size_t count)
1281 int bitnr = to_sensor_dev_attr(attr)->index;
1282 struct it87_data *data = dev_get_drvdata(dev);
1285 if (kstrtol(buf, 10, &val) < 0
1286 || (val != 0 && val != 1))
1289 mutex_lock(&data->update_lock);
1290 data->beeps = it87_read_value(data, IT87_REG_BEEP_ENABLE);
1292 data->beeps |= (1 << bitnr);
1294 data->beeps &= ~(1 << bitnr);
1295 it87_write_value(data, IT87_REG_BEEP_ENABLE, data->beeps);
1296 mutex_unlock(&data->update_lock);
1300 static SENSOR_DEVICE_ATTR(in0_beep, S_IRUGO | S_IWUSR,
1301 show_beep, set_beep, 1);
1302 static SENSOR_DEVICE_ATTR(in1_beep, S_IRUGO, show_beep, NULL, 1);
1303 static SENSOR_DEVICE_ATTR(in2_beep, S_IRUGO, show_beep, NULL, 1);
1304 static SENSOR_DEVICE_ATTR(in3_beep, S_IRUGO, show_beep, NULL, 1);
1305 static SENSOR_DEVICE_ATTR(in4_beep, S_IRUGO, show_beep, NULL, 1);
1306 static SENSOR_DEVICE_ATTR(in5_beep, S_IRUGO, show_beep, NULL, 1);
1307 static SENSOR_DEVICE_ATTR(in6_beep, S_IRUGO, show_beep, NULL, 1);
1308 static SENSOR_DEVICE_ATTR(in7_beep, S_IRUGO, show_beep, NULL, 1);
1309 /* fanX_beep writability is set later */
1310 static SENSOR_DEVICE_ATTR(fan1_beep, S_IRUGO, show_beep, set_beep, 0);
1311 static SENSOR_DEVICE_ATTR(fan2_beep, S_IRUGO, show_beep, set_beep, 0);
1312 static SENSOR_DEVICE_ATTR(fan3_beep, S_IRUGO, show_beep, set_beep, 0);
1313 static SENSOR_DEVICE_ATTR(fan4_beep, S_IRUGO, show_beep, set_beep, 0);
1314 static SENSOR_DEVICE_ATTR(fan5_beep, S_IRUGO, show_beep, set_beep, 0);
1315 static SENSOR_DEVICE_ATTR(temp1_beep, S_IRUGO | S_IWUSR,
1316 show_beep, set_beep, 2);
1317 static SENSOR_DEVICE_ATTR(temp2_beep, S_IRUGO, show_beep, NULL, 2);
1318 static SENSOR_DEVICE_ATTR(temp3_beep, S_IRUGO, show_beep, NULL, 2);
1320 static ssize_t show_vrm_reg(struct device *dev, struct device_attribute *attr,
1323 struct it87_data *data = dev_get_drvdata(dev);
1324 return sprintf(buf, "%u\n", data->vrm);
1326 static ssize_t store_vrm_reg(struct device *dev, struct device_attribute *attr,
1327 const char *buf, size_t count)
1329 struct it87_data *data = dev_get_drvdata(dev);
1332 if (kstrtoul(buf, 10, &val) < 0)
1339 static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm_reg, store_vrm_reg);
1341 static ssize_t show_vid_reg(struct device *dev, struct device_attribute *attr,
1344 struct it87_data *data = it87_update_device(dev);
1345 return sprintf(buf, "%ld\n", (long) vid_from_reg(data->vid, data->vrm));
1347 static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid_reg, NULL);
1349 static ssize_t show_label(struct device *dev, struct device_attribute *attr,
1352 static const char * const labels[] = {
1357 static const char * const labels_it8721[] = {
1362 struct it87_data *data = dev_get_drvdata(dev);
1363 int nr = to_sensor_dev_attr(attr)->index;
1365 return sprintf(buf, "%s\n", has_12mv_adc(data) ? labels_it8721[nr]
1368 static SENSOR_DEVICE_ATTR(in3_label, S_IRUGO, show_label, NULL, 0);
1369 static SENSOR_DEVICE_ATTR(in7_label, S_IRUGO, show_label, NULL, 1);
1370 static SENSOR_DEVICE_ATTR(in8_label, S_IRUGO, show_label, NULL, 2);
1372 static ssize_t show_name(struct device *dev, struct device_attribute
1373 *devattr, char *buf)
1375 struct it87_data *data = dev_get_drvdata(dev);
1376 return sprintf(buf, "%s\n", data->name);
1378 static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
1380 static struct attribute *it87_attributes_in[9][5] = {
1382 &sensor_dev_attr_in0_input.dev_attr.attr,
1383 &sensor_dev_attr_in0_min.dev_attr.attr,
1384 &sensor_dev_attr_in0_max.dev_attr.attr,
1385 &sensor_dev_attr_in0_alarm.dev_attr.attr,
1388 &sensor_dev_attr_in1_input.dev_attr.attr,
1389 &sensor_dev_attr_in1_min.dev_attr.attr,
1390 &sensor_dev_attr_in1_max.dev_attr.attr,
1391 &sensor_dev_attr_in1_alarm.dev_attr.attr,
1394 &sensor_dev_attr_in2_input.dev_attr.attr,
1395 &sensor_dev_attr_in2_min.dev_attr.attr,
1396 &sensor_dev_attr_in2_max.dev_attr.attr,
1397 &sensor_dev_attr_in2_alarm.dev_attr.attr,
1400 &sensor_dev_attr_in3_input.dev_attr.attr,
1401 &sensor_dev_attr_in3_min.dev_attr.attr,
1402 &sensor_dev_attr_in3_max.dev_attr.attr,
1403 &sensor_dev_attr_in3_alarm.dev_attr.attr,
1406 &sensor_dev_attr_in4_input.dev_attr.attr,
1407 &sensor_dev_attr_in4_min.dev_attr.attr,
1408 &sensor_dev_attr_in4_max.dev_attr.attr,
1409 &sensor_dev_attr_in4_alarm.dev_attr.attr,
1412 &sensor_dev_attr_in5_input.dev_attr.attr,
1413 &sensor_dev_attr_in5_min.dev_attr.attr,
1414 &sensor_dev_attr_in5_max.dev_attr.attr,
1415 &sensor_dev_attr_in5_alarm.dev_attr.attr,
1418 &sensor_dev_attr_in6_input.dev_attr.attr,
1419 &sensor_dev_attr_in6_min.dev_attr.attr,
1420 &sensor_dev_attr_in6_max.dev_attr.attr,
1421 &sensor_dev_attr_in6_alarm.dev_attr.attr,
1424 &sensor_dev_attr_in7_input.dev_attr.attr,
1425 &sensor_dev_attr_in7_min.dev_attr.attr,
1426 &sensor_dev_attr_in7_max.dev_attr.attr,
1427 &sensor_dev_attr_in7_alarm.dev_attr.attr,
1430 &sensor_dev_attr_in8_input.dev_attr.attr,
1434 static const struct attribute_group it87_group_in[9] = {
1435 { .attrs = it87_attributes_in[0] },
1436 { .attrs = it87_attributes_in[1] },
1437 { .attrs = it87_attributes_in[2] },
1438 { .attrs = it87_attributes_in[3] },
1439 { .attrs = it87_attributes_in[4] },
1440 { .attrs = it87_attributes_in[5] },
1441 { .attrs = it87_attributes_in[6] },
1442 { .attrs = it87_attributes_in[7] },
1443 { .attrs = it87_attributes_in[8] },
1446 static struct attribute *it87_attributes_temp[3][6] = {
1448 &sensor_dev_attr_temp1_input.dev_attr.attr,
1449 &sensor_dev_attr_temp1_max.dev_attr.attr,
1450 &sensor_dev_attr_temp1_min.dev_attr.attr,
1451 &sensor_dev_attr_temp1_type.dev_attr.attr,
1452 &sensor_dev_attr_temp1_alarm.dev_attr.attr,
1455 &sensor_dev_attr_temp2_input.dev_attr.attr,
1456 &sensor_dev_attr_temp2_max.dev_attr.attr,
1457 &sensor_dev_attr_temp2_min.dev_attr.attr,
1458 &sensor_dev_attr_temp2_type.dev_attr.attr,
1459 &sensor_dev_attr_temp2_alarm.dev_attr.attr,
1462 &sensor_dev_attr_temp3_input.dev_attr.attr,
1463 &sensor_dev_attr_temp3_max.dev_attr.attr,
1464 &sensor_dev_attr_temp3_min.dev_attr.attr,
1465 &sensor_dev_attr_temp3_type.dev_attr.attr,
1466 &sensor_dev_attr_temp3_alarm.dev_attr.attr,
1470 static const struct attribute_group it87_group_temp[3] = {
1471 { .attrs = it87_attributes_temp[0] },
1472 { .attrs = it87_attributes_temp[1] },
1473 { .attrs = it87_attributes_temp[2] },
1476 static struct attribute *it87_attributes[] = {
1477 &dev_attr_alarms.attr,
1478 &sensor_dev_attr_intrusion0_alarm.dev_attr.attr,
1479 &dev_attr_name.attr,
1483 static const struct attribute_group it87_group = {
1484 .attrs = it87_attributes,
1487 static struct attribute *it87_attributes_in_beep[] = {
1488 &sensor_dev_attr_in0_beep.dev_attr.attr,
1489 &sensor_dev_attr_in1_beep.dev_attr.attr,
1490 &sensor_dev_attr_in2_beep.dev_attr.attr,
1491 &sensor_dev_attr_in3_beep.dev_attr.attr,
1492 &sensor_dev_attr_in4_beep.dev_attr.attr,
1493 &sensor_dev_attr_in5_beep.dev_attr.attr,
1494 &sensor_dev_attr_in6_beep.dev_attr.attr,
1495 &sensor_dev_attr_in7_beep.dev_attr.attr,
1499 static struct attribute *it87_attributes_temp_beep[] = {
1500 &sensor_dev_attr_temp1_beep.dev_attr.attr,
1501 &sensor_dev_attr_temp2_beep.dev_attr.attr,
1502 &sensor_dev_attr_temp3_beep.dev_attr.attr,
1505 static struct attribute *it87_attributes_fan16[5][3+1] = { {
1506 &sensor_dev_attr_fan1_input16.dev_attr.attr,
1507 &sensor_dev_attr_fan1_min16.dev_attr.attr,
1508 &sensor_dev_attr_fan1_alarm.dev_attr.attr,
1511 &sensor_dev_attr_fan2_input16.dev_attr.attr,
1512 &sensor_dev_attr_fan2_min16.dev_attr.attr,
1513 &sensor_dev_attr_fan2_alarm.dev_attr.attr,
1516 &sensor_dev_attr_fan3_input16.dev_attr.attr,
1517 &sensor_dev_attr_fan3_min16.dev_attr.attr,
1518 &sensor_dev_attr_fan3_alarm.dev_attr.attr,
1521 &sensor_dev_attr_fan4_input16.dev_attr.attr,
1522 &sensor_dev_attr_fan4_min16.dev_attr.attr,
1523 &sensor_dev_attr_fan4_alarm.dev_attr.attr,
1526 &sensor_dev_attr_fan5_input16.dev_attr.attr,
1527 &sensor_dev_attr_fan5_min16.dev_attr.attr,
1528 &sensor_dev_attr_fan5_alarm.dev_attr.attr,
1532 static const struct attribute_group it87_group_fan16[5] = {
1533 { .attrs = it87_attributes_fan16[0] },
1534 { .attrs = it87_attributes_fan16[1] },
1535 { .attrs = it87_attributes_fan16[2] },
1536 { .attrs = it87_attributes_fan16[3] },
1537 { .attrs = it87_attributes_fan16[4] },
1540 static struct attribute *it87_attributes_fan[3][4+1] = { {
1541 &sensor_dev_attr_fan1_input.dev_attr.attr,
1542 &sensor_dev_attr_fan1_min.dev_attr.attr,
1543 &sensor_dev_attr_fan1_div.dev_attr.attr,
1544 &sensor_dev_attr_fan1_alarm.dev_attr.attr,
1547 &sensor_dev_attr_fan2_input.dev_attr.attr,
1548 &sensor_dev_attr_fan2_min.dev_attr.attr,
1549 &sensor_dev_attr_fan2_div.dev_attr.attr,
1550 &sensor_dev_attr_fan2_alarm.dev_attr.attr,
1553 &sensor_dev_attr_fan3_input.dev_attr.attr,
1554 &sensor_dev_attr_fan3_min.dev_attr.attr,
1555 &sensor_dev_attr_fan3_div.dev_attr.attr,
1556 &sensor_dev_attr_fan3_alarm.dev_attr.attr,
1560 static const struct attribute_group it87_group_fan[3] = {
1561 { .attrs = it87_attributes_fan[0] },
1562 { .attrs = it87_attributes_fan[1] },
1563 { .attrs = it87_attributes_fan[2] },
1566 static const struct attribute_group *
1567 it87_get_fan_group(const struct it87_data *data)
1569 return has_16bit_fans(data) ? it87_group_fan16 : it87_group_fan;
1572 static struct attribute *it87_attributes_pwm[3][4+1] = { {
1573 &sensor_dev_attr_pwm1_enable.dev_attr.attr,
1574 &sensor_dev_attr_pwm1.dev_attr.attr,
1575 &dev_attr_pwm1_freq.attr,
1576 &sensor_dev_attr_pwm1_auto_channels_temp.dev_attr.attr,
1579 &sensor_dev_attr_pwm2_enable.dev_attr.attr,
1580 &sensor_dev_attr_pwm2.dev_attr.attr,
1581 &dev_attr_pwm2_freq.attr,
1582 &sensor_dev_attr_pwm2_auto_channels_temp.dev_attr.attr,
1585 &sensor_dev_attr_pwm3_enable.dev_attr.attr,
1586 &sensor_dev_attr_pwm3.dev_attr.attr,
1587 &dev_attr_pwm3_freq.attr,
1588 &sensor_dev_attr_pwm3_auto_channels_temp.dev_attr.attr,
1592 static const struct attribute_group it87_group_pwm[3] = {
1593 { .attrs = it87_attributes_pwm[0] },
1594 { .attrs = it87_attributes_pwm[1] },
1595 { .attrs = it87_attributes_pwm[2] },
1598 static struct attribute *it87_attributes_autopwm[3][9+1] = { {
1599 &sensor_dev_attr_pwm1_auto_point1_pwm.dev_attr.attr,
1600 &sensor_dev_attr_pwm1_auto_point2_pwm.dev_attr.attr,
1601 &sensor_dev_attr_pwm1_auto_point3_pwm.dev_attr.attr,
1602 &sensor_dev_attr_pwm1_auto_point4_pwm.dev_attr.attr,
1603 &sensor_dev_attr_pwm1_auto_point1_temp.dev_attr.attr,
1604 &sensor_dev_attr_pwm1_auto_point1_temp_hyst.dev_attr.attr,
1605 &sensor_dev_attr_pwm1_auto_point2_temp.dev_attr.attr,
1606 &sensor_dev_attr_pwm1_auto_point3_temp.dev_attr.attr,
1607 &sensor_dev_attr_pwm1_auto_point4_temp.dev_attr.attr,
1610 &sensor_dev_attr_pwm2_auto_point1_pwm.dev_attr.attr,
1611 &sensor_dev_attr_pwm2_auto_point2_pwm.dev_attr.attr,
1612 &sensor_dev_attr_pwm2_auto_point3_pwm.dev_attr.attr,
1613 &sensor_dev_attr_pwm2_auto_point4_pwm.dev_attr.attr,
1614 &sensor_dev_attr_pwm2_auto_point1_temp.dev_attr.attr,
1615 &sensor_dev_attr_pwm2_auto_point1_temp_hyst.dev_attr.attr,
1616 &sensor_dev_attr_pwm2_auto_point2_temp.dev_attr.attr,
1617 &sensor_dev_attr_pwm2_auto_point3_temp.dev_attr.attr,
1618 &sensor_dev_attr_pwm2_auto_point4_temp.dev_attr.attr,
1621 &sensor_dev_attr_pwm3_auto_point1_pwm.dev_attr.attr,
1622 &sensor_dev_attr_pwm3_auto_point2_pwm.dev_attr.attr,
1623 &sensor_dev_attr_pwm3_auto_point3_pwm.dev_attr.attr,
1624 &sensor_dev_attr_pwm3_auto_point4_pwm.dev_attr.attr,
1625 &sensor_dev_attr_pwm3_auto_point1_temp.dev_attr.attr,
1626 &sensor_dev_attr_pwm3_auto_point1_temp_hyst.dev_attr.attr,
1627 &sensor_dev_attr_pwm3_auto_point2_temp.dev_attr.attr,
1628 &sensor_dev_attr_pwm3_auto_point3_temp.dev_attr.attr,
1629 &sensor_dev_attr_pwm3_auto_point4_temp.dev_attr.attr,
1633 static const struct attribute_group it87_group_autopwm[3] = {
1634 { .attrs = it87_attributes_autopwm[0] },
1635 { .attrs = it87_attributes_autopwm[1] },
1636 { .attrs = it87_attributes_autopwm[2] },
1639 static struct attribute *it87_attributes_fan_beep[] = {
1640 &sensor_dev_attr_fan1_beep.dev_attr.attr,
1641 &sensor_dev_attr_fan2_beep.dev_attr.attr,
1642 &sensor_dev_attr_fan3_beep.dev_attr.attr,
1643 &sensor_dev_attr_fan4_beep.dev_attr.attr,
1644 &sensor_dev_attr_fan5_beep.dev_attr.attr,
1647 static struct attribute *it87_attributes_vid[] = {
1649 &dev_attr_cpu0_vid.attr,
1653 static const struct attribute_group it87_group_vid = {
1654 .attrs = it87_attributes_vid,
1657 static struct attribute *it87_attributes_label[] = {
1658 &sensor_dev_attr_in3_label.dev_attr.attr,
1659 &sensor_dev_attr_in7_label.dev_attr.attr,
1660 &sensor_dev_attr_in8_label.dev_attr.attr,
1664 static const struct attribute_group it87_group_label = {
1665 .attrs = it87_attributes_label,
1668 /* SuperIO detection - will change isa_address if a chip is found */
1669 static int __init it87_find(unsigned short *address,
1670 struct it87_sio_data *sio_data)
1674 const char *board_vendor, *board_name;
1676 err = superio_enter();
1681 chip_type = force_id ? force_id : superio_inw(DEVID);
1683 switch (chip_type) {
1685 sio_data->type = it87;
1688 sio_data->type = it8712;
1692 sio_data->type = it8716;
1695 sio_data->type = it8718;
1698 sio_data->type = it8720;
1701 sio_data->type = it8721;
1704 sio_data->type = it8728;
1707 sio_data->type = it8782;
1710 sio_data->type = it8783;
1712 case 0xffff: /* No device at all */
1715 pr_debug("Unsupported chip (DEVID=0x%x)\n", chip_type);
1719 superio_select(PME);
1720 if (!(superio_inb(IT87_ACT_REG) & 0x01)) {
1721 pr_info("Device not activated, skipping\n");
1725 *address = superio_inw(IT87_BASE_REG) & ~(IT87_EXTENT - 1);
1726 if (*address == 0) {
1727 pr_info("Base address not set, skipping\n");
1732 sio_data->revision = superio_inb(DEVREV) & 0x0f;
1733 pr_info("Found IT%04xF chip at 0x%x, revision %d\n",
1734 chip_type, *address, sio_data->revision);
1736 /* in8 (Vbat) is always internal */
1737 sio_data->internal = (1 << 2);
1739 /* Read GPIO config and VID value from LDN 7 (GPIO) */
1740 if (sio_data->type == it87) {
1741 /* The IT8705F doesn't have VID pins at all */
1742 sio_data->skip_vid = 1;
1744 /* The IT8705F has a different LD number for GPIO */
1746 sio_data->beep_pin = superio_inb(IT87_SIO_BEEP_PIN_REG) & 0x3f;
1747 } else if (sio_data->type == it8783) {
1748 int reg25, reg27, reg2A, reg2C, regEF;
1750 sio_data->skip_vid = 1; /* No VID */
1752 superio_select(GPIO);
1754 reg25 = superio_inb(IT87_SIO_GPIO1_REG);
1755 reg27 = superio_inb(IT87_SIO_GPIO3_REG);
1756 reg2A = superio_inb(IT87_SIO_PINX1_REG);
1757 reg2C = superio_inb(IT87_SIO_PINX2_REG);
1758 regEF = superio_inb(IT87_SIO_SPI_REG);
1760 /* Check if fan3 is there or not */
1761 if ((reg27 & (1 << 0)) || !(reg2C & (1 << 2)))
1762 sio_data->skip_fan |= (1 << 2);
1763 if ((reg25 & (1 << 4))
1764 || (!(reg2A & (1 << 1)) && (regEF & (1 << 0))))
1765 sio_data->skip_pwm |= (1 << 2);
1767 /* Check if fan2 is there or not */
1768 if (reg27 & (1 << 7))
1769 sio_data->skip_fan |= (1 << 1);
1770 if (reg27 & (1 << 3))
1771 sio_data->skip_pwm |= (1 << 1);
1774 if ((reg27 & (1 << 0)) || (reg2C & (1 << 2)))
1775 sio_data->skip_in |= (1 << 5); /* No VIN5 */
1778 if (reg27 & (1 << 1))
1779 sio_data->skip_in |= (1 << 6); /* No VIN6 */
1783 * Does not depend on bit 2 of Reg2C, contrary to datasheet.
1785 if (reg27 & (1 << 2)) {
1787 * The data sheet is a bit unclear regarding the
1788 * internal voltage divider for VCCH5V. It says
1789 * "This bit enables and switches VIN7 (pin 91) to the
1790 * internal voltage divider for VCCH5V".
1791 * This is different to other chips, where the internal
1792 * voltage divider would connect VIN7 to an internal
1793 * voltage source. Maybe that is the case here as well.
1795 * Since we don't know for sure, re-route it if that is
1796 * not the case, and ask the user to report if the
1797 * resulting voltage is sane.
1799 if (!(reg2C & (1 << 1))) {
1801 superio_outb(IT87_SIO_PINX2_REG, reg2C);
1802 pr_notice("Routing internal VCCH5V to in7.\n");
1804 pr_notice("in7 routed to internal voltage divider, with external pin disabled.\n");
1805 pr_notice("Please report if it displays a reasonable voltage.\n");
1808 if (reg2C & (1 << 0))
1809 sio_data->internal |= (1 << 0);
1810 if (reg2C & (1 << 1))
1811 sio_data->internal |= (1 << 1);
1813 sio_data->beep_pin = superio_inb(IT87_SIO_BEEP_PIN_REG) & 0x3f;
1819 superio_select(GPIO);
1821 reg = superio_inb(IT87_SIO_GPIO3_REG);
1822 if (sio_data->type == it8721 || sio_data->type == it8728 ||
1823 sio_data->type == it8782) {
1825 * IT8721F/IT8758E, and IT8782F don't have VID pins
1826 * at all, not sure about the IT8728F.
1828 sio_data->skip_vid = 1;
1830 /* We need at least 4 VID pins */
1832 pr_info("VID is disabled (pins used for GPIO)\n");
1833 sio_data->skip_vid = 1;
1837 /* Check if fan3 is there or not */
1839 sio_data->skip_pwm |= (1 << 2);
1841 sio_data->skip_fan |= (1 << 2);
1843 /* Check if fan2 is there or not */
1844 reg = superio_inb(IT87_SIO_GPIO5_REG);
1846 sio_data->skip_pwm |= (1 << 1);
1848 sio_data->skip_fan |= (1 << 1);
1850 if ((sio_data->type == it8718 || sio_data->type == it8720)
1851 && !(sio_data->skip_vid))
1852 sio_data->vid_value = superio_inb(IT87_SIO_VID_REG);
1854 reg = superio_inb(IT87_SIO_PINX2_REG);
1856 uart6 = sio_data->type == it8782 && (reg & (1 << 2));
1859 * The IT8720F has no VIN7 pin, so VCCH should always be
1860 * routed internally to VIN7 with an internal divider.
1861 * Curiously, there still is a configuration bit to control
1862 * this, which means it can be set incorrectly. And even
1863 * more curiously, many boards out there are improperly
1864 * configured, even though the IT8720F datasheet claims
1865 * that the internal routing of VCCH to VIN7 is the default
1866 * setting. So we force the internal routing in this case.
1868 * On IT8782F, VIN7 is multiplexed with one of the UART6 pins.
1869 * If UART6 is enabled, re-route VIN7 to the internal divider
1870 * if that is not already the case.
1872 if ((sio_data->type == it8720 || uart6) && !(reg & (1 << 1))) {
1874 superio_outb(IT87_SIO_PINX2_REG, reg);
1875 pr_notice("Routing internal VCCH to in7\n");
1878 sio_data->internal |= (1 << 0);
1879 if ((reg & (1 << 1)) || sio_data->type == it8721 ||
1880 sio_data->type == it8728)
1881 sio_data->internal |= (1 << 1);
1884 * On IT8782F, UART6 pins overlap with VIN5, VIN6, and VIN7.
1885 * While VIN7 can be routed to the internal voltage divider,
1886 * VIN5 and VIN6 are not available if UART6 is enabled.
1888 * Also, temp3 is not available if UART6 is enabled and TEMPIN3
1889 * is the temperature source. Since we can not read the
1890 * temperature source here, skip_temp is preliminary.
1893 sio_data->skip_in |= (1 << 5) | (1 << 6);
1894 sio_data->skip_temp |= (1 << 2);
1897 sio_data->beep_pin = superio_inb(IT87_SIO_BEEP_PIN_REG) & 0x3f;
1899 if (sio_data->beep_pin)
1900 pr_info("Beeping is supported\n");
1902 /* Disable specific features based on DMI strings */
1903 board_vendor = dmi_get_system_info(DMI_BOARD_VENDOR);
1904 board_name = dmi_get_system_info(DMI_BOARD_NAME);
1905 if (board_vendor && board_name) {
1906 if (strcmp(board_vendor, "nVIDIA") == 0
1907 && strcmp(board_name, "FN68PT") == 0) {
1909 * On the Shuttle SN68PT, FAN_CTL2 is apparently not
1910 * connected to a fan, but to something else. One user
1911 * has reported instant system power-off when changing
1912 * the PWM2 duty cycle, so we disable it.
1913 * I use the board name string as the trigger in case
1914 * the same board is ever used in other systems.
1916 pr_info("Disabling pwm2 due to hardware constraints\n");
1917 sio_data->skip_pwm = (1 << 1);
1926 static void it87_remove_files(struct device *dev)
1928 struct it87_data *data = platform_get_drvdata(pdev);
1929 struct it87_sio_data *sio_data = dev->platform_data;
1930 const struct attribute_group *fan_group = it87_get_fan_group(data);
1933 sysfs_remove_group(&dev->kobj, &it87_group);
1934 for (i = 0; i < 9; i++) {
1935 if (sio_data->skip_in & (1 << i))
1937 sysfs_remove_group(&dev->kobj, &it87_group_in[i]);
1938 if (it87_attributes_in_beep[i])
1939 sysfs_remove_file(&dev->kobj,
1940 it87_attributes_in_beep[i]);
1942 for (i = 0; i < 3; i++) {
1943 if (!(data->has_temp & (1 << i)))
1945 sysfs_remove_group(&dev->kobj, &it87_group_temp[i]);
1946 if (sio_data->beep_pin)
1947 sysfs_remove_file(&dev->kobj,
1948 it87_attributes_temp_beep[i]);
1950 for (i = 0; i < 5; i++) {
1951 if (!(data->has_fan & (1 << i)))
1953 sysfs_remove_group(&dev->kobj, &fan_group[i]);
1954 if (sio_data->beep_pin)
1955 sysfs_remove_file(&dev->kobj,
1956 it87_attributes_fan_beep[i]);
1958 for (i = 0; i < 3; i++) {
1959 if (sio_data->skip_pwm & (1 << 0))
1961 sysfs_remove_group(&dev->kobj, &it87_group_pwm[i]);
1962 if (has_old_autopwm(data))
1963 sysfs_remove_group(&dev->kobj,
1964 &it87_group_autopwm[i]);
1966 if (!sio_data->skip_vid)
1967 sysfs_remove_group(&dev->kobj, &it87_group_vid);
1968 sysfs_remove_group(&dev->kobj, &it87_group_label);
1971 static int __devinit it87_probe(struct platform_device *pdev)
1973 struct it87_data *data;
1974 struct resource *res;
1975 struct device *dev = &pdev->dev;
1976 struct it87_sio_data *sio_data = dev->platform_data;
1977 const struct attribute_group *fan_group;
1979 int enable_pwm_interface;
1980 int fan_beep_need_rw;
1981 static const char * const names[] = {
1993 res = platform_get_resource(pdev, IORESOURCE_IO, 0);
1994 if (!devm_request_region(&pdev->dev, res->start, IT87_EC_EXTENT,
1996 dev_err(dev, "Failed to request region 0x%lx-0x%lx\n",
1997 (unsigned long)res->start,
1998 (unsigned long)(res->start + IT87_EC_EXTENT - 1));
2002 data = devm_kzalloc(&pdev->dev, sizeof(struct it87_data), GFP_KERNEL);
2006 data->addr = res->start;
2007 data->type = sio_data->type;
2008 data->revision = sio_data->revision;
2009 data->name = names[sio_data->type];
2011 /* Now, we do the remaining detection. */
2012 if ((it87_read_value(data, IT87_REG_CONFIG) & 0x80)
2013 || it87_read_value(data, IT87_REG_CHIPID) != 0x90)
2016 platform_set_drvdata(pdev, data);
2018 mutex_init(&data->update_lock);
2020 /* Check PWM configuration */
2021 enable_pwm_interface = it87_check_pwm(dev);
2023 /* Starting with IT8721F, we handle scaling of internal voltages */
2024 if (has_12mv_adc(data)) {
2025 if (sio_data->internal & (1 << 0))
2026 data->in_scaled |= (1 << 3); /* in3 is AVCC */
2027 if (sio_data->internal & (1 << 1))
2028 data->in_scaled |= (1 << 7); /* in7 is VSB */
2029 if (sio_data->internal & (1 << 2))
2030 data->in_scaled |= (1 << 8); /* in8 is Vbat */
2031 } else if (sio_data->type == it8782 || sio_data->type == it8783) {
2032 if (sio_data->internal & (1 << 0))
2033 data->in_scaled |= (1 << 3); /* in3 is VCC5V */
2034 if (sio_data->internal & (1 << 1))
2035 data->in_scaled |= (1 << 7); /* in7 is VCCH5V */
2038 data->has_temp = 0x07;
2039 if (sio_data->skip_temp & (1 << 2)) {
2040 if (sio_data->type == it8782
2041 && !(it87_read_value(data, IT87_REG_TEMP_EXTRA) & 0x80))
2042 data->has_temp &= ~(1 << 2);
2045 /* Initialize the IT87 chip */
2046 it87_init_device(pdev);
2048 /* Register sysfs hooks */
2049 err = sysfs_create_group(&dev->kobj, &it87_group);
2053 for (i = 0; i < 9; i++) {
2054 if (sio_data->skip_in & (1 << i))
2056 err = sysfs_create_group(&dev->kobj, &it87_group_in[i]);
2059 if (sio_data->beep_pin && it87_attributes_in_beep[i]) {
2060 err = sysfs_create_file(&dev->kobj,
2061 it87_attributes_in_beep[i]);
2067 for (i = 0; i < 3; i++) {
2068 if (!(data->has_temp & (1 << i)))
2070 err = sysfs_create_group(&dev->kobj, &it87_group_temp[i]);
2073 if (sio_data->beep_pin) {
2074 err = sysfs_create_file(&dev->kobj,
2075 it87_attributes_temp_beep[i]);
2081 /* Do not create fan files for disabled fans */
2082 fan_group = it87_get_fan_group(data);
2083 fan_beep_need_rw = 1;
2084 for (i = 0; i < 5; i++) {
2085 if (!(data->has_fan & (1 << i)))
2087 err = sysfs_create_group(&dev->kobj, &fan_group[i]);
2091 if (sio_data->beep_pin) {
2092 err = sysfs_create_file(&dev->kobj,
2093 it87_attributes_fan_beep[i]);
2096 if (!fan_beep_need_rw)
2100 * As we have a single beep enable bit for all fans,
2101 * only the first enabled fan has a writable attribute
2104 if (sysfs_chmod_file(&dev->kobj,
2105 it87_attributes_fan_beep[i],
2107 dev_dbg(dev, "chmod +w fan%d_beep failed\n",
2109 fan_beep_need_rw = 0;
2113 if (enable_pwm_interface) {
2114 for (i = 0; i < 3; i++) {
2115 if (sio_data->skip_pwm & (1 << i))
2117 err = sysfs_create_group(&dev->kobj,
2118 &it87_group_pwm[i]);
2122 if (!has_old_autopwm(data))
2124 err = sysfs_create_group(&dev->kobj,
2125 &it87_group_autopwm[i]);
2131 if (!sio_data->skip_vid) {
2132 data->vrm = vid_which_vrm();
2133 /* VID reading from Super-I/O config space if available */
2134 data->vid = sio_data->vid_value;
2135 err = sysfs_create_group(&dev->kobj, &it87_group_vid);
2140 /* Export labels for internal sensors */
2141 for (i = 0; i < 3; i++) {
2142 if (!(sio_data->internal & (1 << i)))
2144 err = sysfs_create_file(&dev->kobj,
2145 it87_attributes_label[i]);
2150 data->hwmon_dev = hwmon_device_register(dev);
2151 if (IS_ERR(data->hwmon_dev)) {
2152 err = PTR_ERR(data->hwmon_dev);
2159 it87_remove_files(dev);
2163 static int __devexit it87_remove(struct platform_device *pdev)
2165 struct it87_data *data = platform_get_drvdata(pdev);
2167 hwmon_device_unregister(data->hwmon_dev);
2168 it87_remove_files(&pdev->dev);
2174 * Must be called with data->update_lock held, except during initialization.
2175 * We ignore the IT87 BUSY flag at this moment - it could lead to deadlocks,
2176 * would slow down the IT87 access and should not be necessary.
2178 static int it87_read_value(struct it87_data *data, u8 reg)
2180 outb_p(reg, data->addr + IT87_ADDR_REG_OFFSET);
2181 return inb_p(data->addr + IT87_DATA_REG_OFFSET);
2185 * Must be called with data->update_lock held, except during initialization.
2186 * We ignore the IT87 BUSY flag at this moment - it could lead to deadlocks,
2187 * would slow down the IT87 access and should not be necessary.
2189 static void it87_write_value(struct it87_data *data, u8 reg, u8 value)
2191 outb_p(reg, data->addr + IT87_ADDR_REG_OFFSET);
2192 outb_p(value, data->addr + IT87_DATA_REG_OFFSET);
2195 /* Return 1 if and only if the PWM interface is safe to use */
2196 static int __devinit it87_check_pwm(struct device *dev)
2198 struct it87_data *data = dev_get_drvdata(dev);
2200 * Some BIOSes fail to correctly configure the IT87 fans. All fans off
2201 * and polarity set to active low is sign that this is the case so we
2202 * disable pwm control to protect the user.
2204 int tmp = it87_read_value(data, IT87_REG_FAN_CTL);
2205 if ((tmp & 0x87) == 0) {
2206 if (fix_pwm_polarity) {
2208 * The user asks us to attempt a chip reconfiguration.
2209 * This means switching to active high polarity and
2210 * inverting all fan speed values.
2215 for (i = 0; i < 3; i++)
2216 pwm[i] = it87_read_value(data,
2220 * If any fan is in automatic pwm mode, the polarity
2221 * might be correct, as suspicious as it seems, so we
2222 * better don't change anything (but still disable the
2225 if (!((pwm[0] | pwm[1] | pwm[2]) & 0x80)) {
2226 dev_info(dev, "Reconfiguring PWM to "
2227 "active high polarity\n");
2228 it87_write_value(data, IT87_REG_FAN_CTL,
2230 for (i = 0; i < 3; i++)
2231 it87_write_value(data,
2237 dev_info(dev, "PWM configuration is "
2238 "too broken to be fixed\n");
2241 dev_info(dev, "Detected broken BIOS "
2242 "defaults, disabling PWM interface\n");
2244 } else if (fix_pwm_polarity) {
2245 dev_info(dev, "PWM configuration looks "
2246 "sane, won't touch\n");
2252 /* Called when we have found a new IT87. */
2253 static void __devinit it87_init_device(struct platform_device *pdev)
2255 struct it87_sio_data *sio_data = pdev->dev.platform_data;
2256 struct it87_data *data = platform_get_drvdata(pdev);
2261 * For each PWM channel:
2262 * - If it is in automatic mode, setting to manual mode should set
2263 * the fan to full speed by default.
2264 * - If it is in manual mode, we need a mapping to temperature
2265 * channels to use when later setting to automatic mode later.
2266 * Use a 1:1 mapping by default (we are clueless.)
2267 * In both cases, the value can (and should) be changed by the user
2268 * prior to switching to a different mode.
2269 * Note that this is no longer needed for the IT8721F and later, as
2270 * these have separate registers for the temperature mapping and the
2271 * manual duty cycle.
2273 for (i = 0; i < 3; i++) {
2274 data->pwm_temp_map[i] = i;
2275 data->pwm_duty[i] = 0x7f; /* Full speed */
2276 data->auto_pwm[i][3] = 0x7f; /* Full speed, hard-coded */
2280 * Some chips seem to have default value 0xff for all limit
2281 * registers. For low voltage limits it makes no sense and triggers
2282 * alarms, so change to 0 instead. For high temperature limits, it
2283 * means -1 degree C, which surprisingly doesn't trigger an alarm,
2284 * but is still confusing, so change to 127 degrees C.
2286 for (i = 0; i < 8; i++) {
2287 tmp = it87_read_value(data, IT87_REG_VIN_MIN(i));
2289 it87_write_value(data, IT87_REG_VIN_MIN(i), 0);
2291 for (i = 0; i < 3; i++) {
2292 tmp = it87_read_value(data, IT87_REG_TEMP_HIGH(i));
2294 it87_write_value(data, IT87_REG_TEMP_HIGH(i), 127);
2298 * Temperature channels are not forcibly enabled, as they can be
2299 * set to two different sensor types and we can't guess which one
2300 * is correct for a given system. These channels can be enabled at
2301 * run-time through the temp{1-3}_type sysfs accessors if needed.
2304 /* Check if voltage monitors are reset manually or by some reason */
2305 tmp = it87_read_value(data, IT87_REG_VIN_ENABLE);
2306 if ((tmp & 0xff) == 0) {
2307 /* Enable all voltage monitors */
2308 it87_write_value(data, IT87_REG_VIN_ENABLE, 0xff);
2311 /* Check if tachometers are reset manually or by some reason */
2312 mask = 0x70 & ~(sio_data->skip_fan << 4);
2313 data->fan_main_ctrl = it87_read_value(data, IT87_REG_FAN_MAIN_CTRL);
2314 if ((data->fan_main_ctrl & mask) == 0) {
2315 /* Enable all fan tachometers */
2316 data->fan_main_ctrl |= mask;
2317 it87_write_value(data, IT87_REG_FAN_MAIN_CTRL,
2318 data->fan_main_ctrl);
2320 data->has_fan = (data->fan_main_ctrl >> 4) & 0x07;
2322 /* Set tachometers to 16-bit mode if needed */
2323 if (has_16bit_fans(data)) {
2324 tmp = it87_read_value(data, IT87_REG_FAN_16BIT);
2325 if (~tmp & 0x07 & data->has_fan) {
2327 "Setting fan1-3 to 16-bit mode\n");
2328 it87_write_value(data, IT87_REG_FAN_16BIT,
2331 /* IT8705F, IT8782F, and IT8783E/F only support three fans. */
2332 if (data->type != it87 && data->type != it8782 &&
2333 data->type != it8783) {
2335 data->has_fan |= (1 << 3); /* fan4 enabled */
2337 data->has_fan |= (1 << 4); /* fan5 enabled */
2341 /* Fan input pins may be used for alternative functions */
2342 data->has_fan &= ~sio_data->skip_fan;
2344 /* Start monitoring */
2345 it87_write_value(data, IT87_REG_CONFIG,
2346 (it87_read_value(data, IT87_REG_CONFIG) & 0x3e)
2347 | (update_vbat ? 0x41 : 0x01));
2350 static void it87_update_pwm_ctrl(struct it87_data *data, int nr)
2352 data->pwm_ctrl[nr] = it87_read_value(data, IT87_REG_PWM(nr));
2353 if (has_newer_autopwm(data)) {
2354 data->pwm_temp_map[nr] = data->pwm_ctrl[nr] & 0x03;
2355 data->pwm_duty[nr] = it87_read_value(data,
2356 IT87_REG_PWM_DUTY(nr));
2358 if (data->pwm_ctrl[nr] & 0x80) /* Automatic mode */
2359 data->pwm_temp_map[nr] = data->pwm_ctrl[nr] & 0x03;
2360 else /* Manual mode */
2361 data->pwm_duty[nr] = data->pwm_ctrl[nr] & 0x7f;
2364 if (has_old_autopwm(data)) {
2367 for (i = 0; i < 5 ; i++)
2368 data->auto_temp[nr][i] = it87_read_value(data,
2369 IT87_REG_AUTO_TEMP(nr, i));
2370 for (i = 0; i < 3 ; i++)
2371 data->auto_pwm[nr][i] = it87_read_value(data,
2372 IT87_REG_AUTO_PWM(nr, i));
2376 static struct it87_data *it87_update_device(struct device *dev)
2378 struct it87_data *data = dev_get_drvdata(dev);
2381 mutex_lock(&data->update_lock);
2383 if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
2387 * Cleared after each update, so reenable. Value
2388 * returned by this read will be previous value
2390 it87_write_value(data, IT87_REG_CONFIG,
2391 it87_read_value(data, IT87_REG_CONFIG) | 0x40);
2393 for (i = 0; i <= 7; i++) {
2395 it87_read_value(data, IT87_REG_VIN(i));
2397 it87_read_value(data, IT87_REG_VIN_MIN(i));
2399 it87_read_value(data, IT87_REG_VIN_MAX(i));
2401 /* in8 (battery) has no limit registers */
2402 data->in[8] = it87_read_value(data, IT87_REG_VIN(8));
2404 for (i = 0; i < 5; i++) {
2405 /* Skip disabled fans */
2406 if (!(data->has_fan & (1 << i)))
2410 it87_read_value(data, IT87_REG_FAN_MIN[i]);
2411 data->fan[i] = it87_read_value(data,
2413 /* Add high byte if in 16-bit mode */
2414 if (has_16bit_fans(data)) {
2415 data->fan[i] |= it87_read_value(data,
2416 IT87_REG_FANX[i]) << 8;
2417 data->fan_min[i] |= it87_read_value(data,
2418 IT87_REG_FANX_MIN[i]) << 8;
2421 for (i = 0; i < 3; i++) {
2422 if (!(data->has_temp & (1 << i)))
2425 it87_read_value(data, IT87_REG_TEMP(i));
2426 data->temp_high[i] =
2427 it87_read_value(data, IT87_REG_TEMP_HIGH(i));
2429 it87_read_value(data, IT87_REG_TEMP_LOW(i));
2432 /* Newer chips don't have clock dividers */
2433 if ((data->has_fan & 0x07) && !has_16bit_fans(data)) {
2434 i = it87_read_value(data, IT87_REG_FAN_DIV);
2435 data->fan_div[0] = i & 0x07;
2436 data->fan_div[1] = (i >> 3) & 0x07;
2437 data->fan_div[2] = (i & 0x40) ? 3 : 1;
2441 it87_read_value(data, IT87_REG_ALARM1) |
2442 (it87_read_value(data, IT87_REG_ALARM2) << 8) |
2443 (it87_read_value(data, IT87_REG_ALARM3) << 16);
2444 data->beeps = it87_read_value(data, IT87_REG_BEEP_ENABLE);
2446 data->fan_main_ctrl = it87_read_value(data,
2447 IT87_REG_FAN_MAIN_CTRL);
2448 data->fan_ctl = it87_read_value(data, IT87_REG_FAN_CTL);
2449 for (i = 0; i < 3; i++)
2450 it87_update_pwm_ctrl(data, i);
2452 data->sensor = it87_read_value(data, IT87_REG_TEMP_ENABLE);
2454 * The IT8705F does not have VID capability.
2455 * The IT8718F and later don't use IT87_REG_VID for the
2458 if (data->type == it8712 || data->type == it8716) {
2459 data->vid = it87_read_value(data, IT87_REG_VID);
2461 * The older IT8712F revisions had only 5 VID pins,
2462 * but we assume it is always safe to read 6 bits.
2466 data->last_updated = jiffies;
2470 mutex_unlock(&data->update_lock);
2475 static int __init it87_device_add(unsigned short address,
2476 const struct it87_sio_data *sio_data)
2478 struct resource res = {
2479 .start = address + IT87_EC_OFFSET,
2480 .end = address + IT87_EC_OFFSET + IT87_EC_EXTENT - 1,
2482 .flags = IORESOURCE_IO,
2486 err = acpi_check_resource_conflict(&res);
2490 pdev = platform_device_alloc(DRVNAME, address);
2493 pr_err("Device allocation failed\n");
2497 err = platform_device_add_resources(pdev, &res, 1);
2499 pr_err("Device resource addition failed (%d)\n", err);
2500 goto exit_device_put;
2503 err = platform_device_add_data(pdev, sio_data,
2504 sizeof(struct it87_sio_data));
2506 pr_err("Platform data allocation failed\n");
2507 goto exit_device_put;
2510 err = platform_device_add(pdev);
2512 pr_err("Device addition failed (%d)\n", err);
2513 goto exit_device_put;
2519 platform_device_put(pdev);
2524 static int __init sm_it87_init(void)
2527 unsigned short isa_address = 0;
2528 struct it87_sio_data sio_data;
2530 memset(&sio_data, 0, sizeof(struct it87_sio_data));
2531 err = it87_find(&isa_address, &sio_data);
2534 err = platform_driver_register(&it87_driver);
2538 err = it87_device_add(isa_address, &sio_data);
2540 platform_driver_unregister(&it87_driver);
2547 static void __exit sm_it87_exit(void)
2549 platform_device_unregister(pdev);
2550 platform_driver_unregister(&it87_driver);
2554 MODULE_AUTHOR("Chris Gauthron, "
2555 "Jean Delvare <khali@linux-fr.org>");
2556 MODULE_DESCRIPTION("IT8705F/IT871xF/IT872xF hardware monitoring driver");
2557 module_param(update_vbat, bool, 0);
2558 MODULE_PARM_DESC(update_vbat, "Update vbat if set else return powerup value");
2559 module_param(fix_pwm_polarity, bool, 0);
2560 MODULE_PARM_DESC(fix_pwm_polarity,
2561 "Force PWM polarity to active high (DANGEROUS)");
2562 MODULE_LICENSE("GPL");
2564 module_init(sm_it87_init);
2565 module_exit(sm_it87_exit);