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>
62 #define DRVNAME "it87"
64 enum chips { it87, it8712, it8716, it8718, it8720, it8721, it8728, it8782,
67 static unsigned short force_id;
68 module_param(force_id, ushort, 0);
69 MODULE_PARM_DESC(force_id, "Override the detected device ID");
71 static struct platform_device *pdev;
73 #define REG 0x2e /* The register to read/write */
74 #define DEV 0x07 /* Register: Logical device select */
75 #define VAL 0x2f /* The value to read/write */
76 #define PME 0x04 /* The device with the fan registers in it */
78 /* The device with the IT8718F/IT8720F VID value in it */
81 #define DEVID 0x20 /* Register: Device ID */
82 #define DEVREV 0x22 /* Register: Device Revision */
84 static inline int superio_inb(int reg)
90 static inline void superio_outb(int reg, int val)
96 static int superio_inw(int reg)
106 static inline void superio_select(int ldn)
112 static inline int superio_enter(void)
115 * Try to reserve REG and REG + 1 for exclusive access.
117 if (!request_muxed_region(REG, 2, DRVNAME))
127 static inline void superio_exit(void)
131 release_region(REG, 2);
134 /* Logical device 4 registers */
135 #define IT8712F_DEVID 0x8712
136 #define IT8705F_DEVID 0x8705
137 #define IT8716F_DEVID 0x8716
138 #define IT8718F_DEVID 0x8718
139 #define IT8720F_DEVID 0x8720
140 #define IT8721F_DEVID 0x8721
141 #define IT8726F_DEVID 0x8726
142 #define IT8728F_DEVID 0x8728
143 #define IT8782F_DEVID 0x8782
144 #define IT8783E_DEVID 0x8783
145 #define IT87_ACT_REG 0x30
146 #define IT87_BASE_REG 0x60
148 /* Logical device 7 registers (IT8712F and later) */
149 #define IT87_SIO_GPIO1_REG 0x25
150 #define IT87_SIO_GPIO3_REG 0x27
151 #define IT87_SIO_GPIO5_REG 0x29
152 #define IT87_SIO_PINX1_REG 0x2a /* Pin selection */
153 #define IT87_SIO_PINX2_REG 0x2c /* Pin selection */
154 #define IT87_SIO_SPI_REG 0xef /* SPI function pin select */
155 #define IT87_SIO_VID_REG 0xfc /* VID value */
156 #define IT87_SIO_BEEP_PIN_REG 0xf6 /* Beep pin mapping */
158 /* Update battery voltage after every reading if true */
159 static bool update_vbat;
161 /* Not all BIOSes properly configure the PWM registers */
162 static bool fix_pwm_polarity;
164 /* Many IT87 constants specified below */
166 /* Length of ISA address segment */
167 #define IT87_EXTENT 8
169 /* Length of ISA address segment for Environmental Controller */
170 #define IT87_EC_EXTENT 2
172 /* Offset of EC registers from ISA base address */
173 #define IT87_EC_OFFSET 5
175 /* Where are the ISA address/data registers relative to the EC base address */
176 #define IT87_ADDR_REG_OFFSET 0
177 #define IT87_DATA_REG_OFFSET 1
179 /*----- The IT87 registers -----*/
181 #define IT87_REG_CONFIG 0x00
183 #define IT87_REG_ALARM1 0x01
184 #define IT87_REG_ALARM2 0x02
185 #define IT87_REG_ALARM3 0x03
188 * The IT8718F and IT8720F have the VID value in a different register, in
189 * Super-I/O configuration space.
191 #define IT87_REG_VID 0x0a
193 * The IT8705F and IT8712F earlier than revision 0x08 use register 0x0b
194 * for fan divisors. Later IT8712F revisions must use 16-bit tachometer
197 #define IT87_REG_FAN_DIV 0x0b
198 #define IT87_REG_FAN_16BIT 0x0c
200 /* Monitors: 9 voltage (0 to 7, battery), 3 temp (1 to 3), 3 fan (1 to 3) */
202 static const u8 IT87_REG_FAN[] = { 0x0d, 0x0e, 0x0f, 0x80, 0x82 };
203 static const u8 IT87_REG_FAN_MIN[] = { 0x10, 0x11, 0x12, 0x84, 0x86 };
204 static const u8 IT87_REG_FANX[] = { 0x18, 0x19, 0x1a, 0x81, 0x83 };
205 static const u8 IT87_REG_FANX_MIN[] = { 0x1b, 0x1c, 0x1d, 0x85, 0x87 };
206 static const u8 IT87_REG_TEMP_OFFSET[] = { 0x56, 0x57, 0x59 };
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][3]; /* [nr][0]=in, [1]=min, [2]=max */
264 u8 has_fan; /* Bitfield, fans enabled */
265 u16 fan[5][2]; /* Register values, [nr][0]=fan, [1]=min */
266 u8 has_temp; /* Bitfield, temp sensors enabled */
267 s8 temp[3][4]; /* [nr][0]=temp, [1]=min, [2]=max, [3]=offset */
268 u8 sensor; /* Register value */
269 u8 fan_div[3]; /* Register encoding, shifted right */
270 u8 vid; /* Register encoding, combined */
272 u32 alarms; /* Register encoding, combined */
273 u8 beeps; /* Register encoding */
274 u8 fan_main_ctrl; /* Register value */
275 u8 fan_ctl; /* Register value */
278 * The following 3 arrays correspond to the same registers up to
279 * the IT8720F. The meaning of bits 6-0 depends on the value of bit
280 * 7, and we want to preserve settings on mode changes, so we have
281 * to track all values separately.
282 * Starting with the IT8721F, the manual PWM duty cycles are stored
283 * in separate registers (8-bit values), so the separate tracking
284 * is no longer needed, but it is still done to keep the driver
287 u8 pwm_ctrl[3]; /* Register value */
288 u8 pwm_duty[3]; /* Manual PWM value set by user */
289 u8 pwm_temp_map[3]; /* PWM to temp. chan. mapping (bits 1-0) */
291 /* Automatic fan speed control registers */
292 u8 auto_pwm[3][4]; /* [nr][3] is hard-coded */
293 s8 auto_temp[3][5]; /* [nr][0] is point1_temp_hyst */
296 static inline int has_12mv_adc(const struct it87_data *data)
299 * IT8721F and later have a 12 mV ADC, also with internal scaling
300 * on selected inputs.
302 return data->type == it8721
303 || data->type == it8728;
306 static inline int has_newer_autopwm(const struct it87_data *data)
309 * IT8721F and later have separate registers for the temperature
310 * mapping and the manual duty cycle.
312 return data->type == it8721
313 || data->type == it8728;
316 static inline int has_temp_offset(const struct it87_data *data)
318 return data->type == it8716
319 || data->type == it8718
320 || data->type == it8720
321 || data->type == it8721
322 || data->type == it8728
323 || data->type == it8782
324 || data->type == it8783;
327 static int adc_lsb(const struct it87_data *data, int nr)
329 int lsb = has_12mv_adc(data) ? 12 : 16;
330 if (data->in_scaled & (1 << nr))
335 static u8 in_to_reg(const struct it87_data *data, int nr, long val)
337 val = DIV_ROUND_CLOSEST(val, adc_lsb(data, nr));
338 return SENSORS_LIMIT(val, 0, 255);
341 static int in_from_reg(const struct it87_data *data, int nr, int val)
343 return val * adc_lsb(data, nr);
346 static inline u8 FAN_TO_REG(long rpm, int div)
350 rpm = SENSORS_LIMIT(rpm, 1, 1000000);
351 return SENSORS_LIMIT((1350000 + rpm * div / 2) / (rpm * div), 1,
355 static inline u16 FAN16_TO_REG(long rpm)
359 return SENSORS_LIMIT((1350000 + rpm) / (rpm * 2), 1, 0xfffe);
362 #define FAN_FROM_REG(val, div) ((val) == 0 ? -1 : (val) == 255 ? 0 : \
363 1350000 / ((val) * (div)))
364 /* The divider is fixed to 2 in 16-bit mode */
365 #define FAN16_FROM_REG(val) ((val) == 0 ? -1 : (val) == 0xffff ? 0 : \
366 1350000 / ((val) * 2))
368 #define TEMP_TO_REG(val) (SENSORS_LIMIT(((val) < 0 ? (((val) - 500) / 1000) : \
369 ((val) + 500) / 1000), -128, 127))
370 #define TEMP_FROM_REG(val) ((val) * 1000)
372 static u8 pwm_to_reg(const struct it87_data *data, long val)
374 if (has_newer_autopwm(data))
380 static int pwm_from_reg(const struct it87_data *data, u8 reg)
382 if (has_newer_autopwm(data))
385 return (reg & 0x7f) << 1;
389 static int DIV_TO_REG(int val)
392 while (answer < 7 && (val >>= 1))
396 #define DIV_FROM_REG(val) (1 << (val))
398 static const unsigned int pwm_freq[8] = {
409 static inline int has_16bit_fans(const struct it87_data *data)
412 * IT8705F Datasheet 0.4.1, 3h == Version G.
413 * IT8712F Datasheet 0.9.1, section 8.3.5 indicates 8h == Version J.
414 * These are the first revisions with 16-bit tachometer support.
416 return (data->type == it87 && data->revision >= 0x03)
417 || (data->type == it8712 && data->revision >= 0x08)
418 || data->type == it8716
419 || data->type == it8718
420 || data->type == it8720
421 || data->type == it8721
422 || data->type == it8728
423 || data->type == it8782
424 || data->type == it8783;
427 static inline int has_old_autopwm(const struct it87_data *data)
430 * The old automatic fan speed control interface is implemented
431 * by IT8705F chips up to revision F and IT8712F chips up to
434 return (data->type == it87 && data->revision < 0x03)
435 || (data->type == it8712 && data->revision < 0x08);
438 static int it87_probe(struct platform_device *pdev);
439 static int it87_remove(struct platform_device *pdev);
441 static int it87_read_value(struct it87_data *data, u8 reg);
442 static void it87_write_value(struct it87_data *data, u8 reg, u8 value);
443 static struct it87_data *it87_update_device(struct device *dev);
444 static int it87_check_pwm(struct device *dev);
445 static void it87_init_device(struct platform_device *pdev);
448 static struct platform_driver it87_driver = {
450 .owner = THIS_MODULE,
454 .remove = it87_remove,
457 static ssize_t show_in(struct device *dev, struct device_attribute *attr,
460 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
462 int index = sattr->index;
464 struct it87_data *data = it87_update_device(dev);
465 return sprintf(buf, "%d\n", in_from_reg(data, nr, data->in[nr][index]));
468 static ssize_t set_in(struct device *dev, struct device_attribute *attr,
469 const char *buf, size_t count)
471 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
473 int index = sattr->index;
475 struct it87_data *data = dev_get_drvdata(dev);
478 if (kstrtoul(buf, 10, &val) < 0)
481 mutex_lock(&data->update_lock);
482 data->in[nr][index] = in_to_reg(data, nr, val);
483 it87_write_value(data,
484 index == 1 ? IT87_REG_VIN_MIN(nr)
485 : IT87_REG_VIN_MAX(nr),
486 data->in[nr][index]);
487 mutex_unlock(&data->update_lock);
491 static SENSOR_DEVICE_ATTR_2(in0_input, S_IRUGO, show_in, NULL, 0, 0);
492 static SENSOR_DEVICE_ATTR_2(in0_min, S_IRUGO | S_IWUSR, show_in, set_in,
494 static SENSOR_DEVICE_ATTR_2(in0_max, S_IRUGO | S_IWUSR, show_in, set_in,
497 static SENSOR_DEVICE_ATTR_2(in1_input, S_IRUGO, show_in, NULL, 1, 0);
498 static SENSOR_DEVICE_ATTR_2(in1_min, S_IRUGO | S_IWUSR, show_in, set_in,
500 static SENSOR_DEVICE_ATTR_2(in1_max, S_IRUGO | S_IWUSR, show_in, set_in,
503 static SENSOR_DEVICE_ATTR_2(in2_input, S_IRUGO, show_in, NULL, 2, 0);
504 static SENSOR_DEVICE_ATTR_2(in2_min, S_IRUGO | S_IWUSR, show_in, set_in,
506 static SENSOR_DEVICE_ATTR_2(in2_max, S_IRUGO | S_IWUSR, show_in, set_in,
509 static SENSOR_DEVICE_ATTR_2(in3_input, S_IRUGO, show_in, NULL, 3, 0);
510 static SENSOR_DEVICE_ATTR_2(in3_min, S_IRUGO | S_IWUSR, show_in, set_in,
512 static SENSOR_DEVICE_ATTR_2(in3_max, S_IRUGO | S_IWUSR, show_in, set_in,
515 static SENSOR_DEVICE_ATTR_2(in4_input, S_IRUGO, show_in, NULL, 4, 0);
516 static SENSOR_DEVICE_ATTR_2(in4_min, S_IRUGO | S_IWUSR, show_in, set_in,
518 static SENSOR_DEVICE_ATTR_2(in4_max, S_IRUGO | S_IWUSR, show_in, set_in,
521 static SENSOR_DEVICE_ATTR_2(in5_input, S_IRUGO, show_in, NULL, 5, 0);
522 static SENSOR_DEVICE_ATTR_2(in5_min, S_IRUGO | S_IWUSR, show_in, set_in,
524 static SENSOR_DEVICE_ATTR_2(in5_max, S_IRUGO | S_IWUSR, show_in, set_in,
527 static SENSOR_DEVICE_ATTR_2(in6_input, S_IRUGO, show_in, NULL, 6, 0);
528 static SENSOR_DEVICE_ATTR_2(in6_min, S_IRUGO | S_IWUSR, show_in, set_in,
530 static SENSOR_DEVICE_ATTR_2(in6_max, S_IRUGO | S_IWUSR, show_in, set_in,
533 static SENSOR_DEVICE_ATTR_2(in7_input, S_IRUGO, show_in, NULL, 7, 0);
534 static SENSOR_DEVICE_ATTR_2(in7_min, S_IRUGO | S_IWUSR, show_in, set_in,
536 static SENSOR_DEVICE_ATTR_2(in7_max, S_IRUGO | S_IWUSR, show_in, set_in,
539 static SENSOR_DEVICE_ATTR_2(in8_input, S_IRUGO, show_in, NULL, 8, 0);
542 static ssize_t show_temp(struct device *dev, struct device_attribute *attr,
545 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
547 int index = sattr->index;
548 struct it87_data *data = it87_update_device(dev);
550 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[nr][index]));
553 static ssize_t set_temp(struct device *dev, struct device_attribute *attr,
554 const char *buf, size_t count)
556 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
558 int index = sattr->index;
559 struct it87_data *data = dev_get_drvdata(dev);
563 if (kstrtol(buf, 10, &val) < 0)
566 mutex_lock(&data->update_lock);
571 reg = IT87_REG_TEMP_LOW(nr);
574 reg = IT87_REG_TEMP_HIGH(nr);
577 regval = it87_read_value(data, IT87_REG_BEEP_ENABLE);
578 if (!(regval & 0x80)) {
580 it87_write_value(data, IT87_REG_BEEP_ENABLE, regval);
583 reg = IT87_REG_TEMP_OFFSET[nr];
587 data->temp[nr][index] = TEMP_TO_REG(val);
588 it87_write_value(data, reg, data->temp[nr][index]);
589 mutex_unlock(&data->update_lock);
593 static SENSOR_DEVICE_ATTR_2(temp1_input, S_IRUGO, show_temp, NULL, 0, 0);
594 static SENSOR_DEVICE_ATTR_2(temp1_min, S_IRUGO | S_IWUSR, show_temp, set_temp,
596 static SENSOR_DEVICE_ATTR_2(temp1_max, S_IRUGO | S_IWUSR, show_temp, set_temp,
598 static SENSOR_DEVICE_ATTR_2(temp1_offset, S_IRUGO | S_IWUSR, show_temp,
600 static SENSOR_DEVICE_ATTR_2(temp2_input, S_IRUGO, show_temp, NULL, 1, 0);
601 static SENSOR_DEVICE_ATTR_2(temp2_min, S_IRUGO | S_IWUSR, show_temp, set_temp,
603 static SENSOR_DEVICE_ATTR_2(temp2_max, S_IRUGO | S_IWUSR, show_temp, set_temp,
605 static SENSOR_DEVICE_ATTR_2(temp2_offset, S_IRUGO | S_IWUSR, show_temp,
607 static SENSOR_DEVICE_ATTR_2(temp3_input, S_IRUGO, show_temp, NULL, 2, 0);
608 static SENSOR_DEVICE_ATTR_2(temp3_min, S_IRUGO | S_IWUSR, show_temp, set_temp,
610 static SENSOR_DEVICE_ATTR_2(temp3_max, S_IRUGO | S_IWUSR, show_temp, set_temp,
612 static SENSOR_DEVICE_ATTR_2(temp3_offset, S_IRUGO | S_IWUSR, show_temp,
615 static ssize_t show_temp_type(struct device *dev, struct device_attribute *attr,
618 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
619 int nr = sensor_attr->index;
620 struct it87_data *data = it87_update_device(dev);
621 u8 reg = data->sensor; /* In case value is updated while used */
624 return sprintf(buf, "3\n"); /* thermal diode */
626 return sprintf(buf, "4\n"); /* thermistor */
627 return sprintf(buf, "0\n"); /* disabled */
630 static ssize_t set_temp_type(struct device *dev, struct device_attribute *attr,
631 const char *buf, size_t count)
633 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
634 int nr = sensor_attr->index;
636 struct it87_data *data = dev_get_drvdata(dev);
640 if (kstrtol(buf, 10, &val) < 0)
643 reg = it87_read_value(data, IT87_REG_TEMP_ENABLE);
646 if (val == 2) { /* backwards compatibility */
647 dev_warn(dev, "Sensor type 2 is deprecated, please use 4 "
651 /* 3 = thermal diode; 4 = thermistor; 0 = disabled */
659 mutex_lock(&data->update_lock);
661 it87_write_value(data, IT87_REG_TEMP_ENABLE, data->sensor);
662 data->valid = 0; /* Force cache refresh */
663 mutex_unlock(&data->update_lock);
667 static SENSOR_DEVICE_ATTR(temp1_type, S_IRUGO | S_IWUSR, show_temp_type,
669 static SENSOR_DEVICE_ATTR(temp2_type, S_IRUGO | S_IWUSR, show_temp_type,
671 static SENSOR_DEVICE_ATTR(temp3_type, S_IRUGO | S_IWUSR, show_temp_type,
676 static int pwm_mode(const struct it87_data *data, int nr)
678 int ctrl = data->fan_main_ctrl & (1 << nr);
680 if (ctrl == 0) /* Full speed */
682 if (data->pwm_ctrl[nr] & 0x80) /* Automatic mode */
684 else /* Manual mode */
688 static ssize_t show_fan(struct device *dev, struct device_attribute *attr,
691 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
693 int index = sattr->index;
695 struct it87_data *data = it87_update_device(dev);
697 speed = has_16bit_fans(data) ?
698 FAN16_FROM_REG(data->fan[nr][index]) :
699 FAN_FROM_REG(data->fan[nr][index],
700 DIV_FROM_REG(data->fan_div[nr]));
701 return sprintf(buf, "%d\n", speed);
704 static ssize_t show_fan_div(struct device *dev, struct device_attribute *attr,
707 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
708 int nr = sensor_attr->index;
710 struct it87_data *data = it87_update_device(dev);
711 return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr]));
713 static ssize_t show_pwm_enable(struct device *dev,
714 struct device_attribute *attr, char *buf)
716 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
717 int nr = sensor_attr->index;
719 struct it87_data *data = it87_update_device(dev);
720 return sprintf(buf, "%d\n", pwm_mode(data, nr));
722 static ssize_t show_pwm(struct device *dev, struct device_attribute *attr,
725 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
726 int nr = sensor_attr->index;
728 struct it87_data *data = it87_update_device(dev);
729 return sprintf(buf, "%d\n",
730 pwm_from_reg(data, data->pwm_duty[nr]));
732 static ssize_t show_pwm_freq(struct device *dev, struct device_attribute *attr,
735 struct it87_data *data = it87_update_device(dev);
736 int index = (data->fan_ctl >> 4) & 0x07;
738 return sprintf(buf, "%u\n", pwm_freq[index]);
741 static ssize_t set_fan(struct device *dev, struct device_attribute *attr,
742 const char *buf, size_t count)
744 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
746 int index = sattr->index;
748 struct it87_data *data = dev_get_drvdata(dev);
752 if (kstrtol(buf, 10, &val) < 0)
755 mutex_lock(&data->update_lock);
757 if (has_16bit_fans(data)) {
758 data->fan[nr][index] = FAN16_TO_REG(val);
759 it87_write_value(data, IT87_REG_FAN_MIN[nr],
760 data->fan[nr][index] & 0xff);
761 it87_write_value(data, IT87_REG_FANX_MIN[nr],
762 data->fan[nr][index] >> 8);
764 reg = it87_read_value(data, IT87_REG_FAN_DIV);
767 data->fan_div[nr] = reg & 0x07;
770 data->fan_div[nr] = (reg >> 3) & 0x07;
773 data->fan_div[nr] = (reg & 0x40) ? 3 : 1;
776 data->fan[nr][index] =
777 FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr]));
778 it87_write_value(data, IT87_REG_FAN_MIN[nr],
779 data->fan[nr][index]);
782 mutex_unlock(&data->update_lock);
786 static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr,
787 const char *buf, size_t count)
789 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
790 int nr = sensor_attr->index;
792 struct it87_data *data = dev_get_drvdata(dev);
797 if (kstrtoul(buf, 10, &val) < 0)
800 mutex_lock(&data->update_lock);
801 old = it87_read_value(data, IT87_REG_FAN_DIV);
803 /* Save fan min limit */
804 min = FAN_FROM_REG(data->fan[nr][1], DIV_FROM_REG(data->fan_div[nr]));
809 data->fan_div[nr] = DIV_TO_REG(val);
813 data->fan_div[nr] = 1;
815 data->fan_div[nr] = 3;
818 val |= (data->fan_div[0] & 0x07);
819 val |= (data->fan_div[1] & 0x07) << 3;
820 if (data->fan_div[2] == 3)
822 it87_write_value(data, IT87_REG_FAN_DIV, val);
824 /* Restore fan min limit */
825 data->fan[nr][1] = FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr]));
826 it87_write_value(data, IT87_REG_FAN_MIN[nr], data->fan[nr][1]);
828 mutex_unlock(&data->update_lock);
832 /* Returns 0 if OK, -EINVAL otherwise */
833 static int check_trip_points(struct device *dev, int nr)
835 const struct it87_data *data = dev_get_drvdata(dev);
838 if (has_old_autopwm(data)) {
839 for (i = 0; i < 3; i++) {
840 if (data->auto_temp[nr][i] > data->auto_temp[nr][i + 1])
843 for (i = 0; i < 2; i++) {
844 if (data->auto_pwm[nr][i] > data->auto_pwm[nr][i + 1])
850 dev_err(dev, "Inconsistent trip points, not switching to "
852 dev_err(dev, "Adjust the trip points and try again\n");
857 static ssize_t set_pwm_enable(struct device *dev,
858 struct device_attribute *attr, const char *buf, size_t count)
860 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
861 int nr = sensor_attr->index;
863 struct it87_data *data = dev_get_drvdata(dev);
866 if (kstrtol(buf, 10, &val) < 0 || val < 0 || val > 2)
869 /* Check trip points before switching to automatic mode */
871 if (check_trip_points(dev, nr) < 0)
875 mutex_lock(&data->update_lock);
879 /* make sure the fan is on when in on/off mode */
880 tmp = it87_read_value(data, IT87_REG_FAN_CTL);
881 it87_write_value(data, IT87_REG_FAN_CTL, tmp | (1 << nr));
882 /* set on/off mode */
883 data->fan_main_ctrl &= ~(1 << nr);
884 it87_write_value(data, IT87_REG_FAN_MAIN_CTRL,
885 data->fan_main_ctrl);
887 if (val == 1) /* Manual mode */
888 data->pwm_ctrl[nr] = has_newer_autopwm(data) ?
889 data->pwm_temp_map[nr] :
891 else /* Automatic mode */
892 data->pwm_ctrl[nr] = 0x80 | data->pwm_temp_map[nr];
893 it87_write_value(data, IT87_REG_PWM(nr), data->pwm_ctrl[nr]);
894 /* set SmartGuardian mode */
895 data->fan_main_ctrl |= (1 << nr);
896 it87_write_value(data, IT87_REG_FAN_MAIN_CTRL,
897 data->fan_main_ctrl);
900 mutex_unlock(&data->update_lock);
903 static ssize_t set_pwm(struct device *dev, struct device_attribute *attr,
904 const char *buf, size_t count)
906 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
907 int nr = sensor_attr->index;
909 struct it87_data *data = dev_get_drvdata(dev);
912 if (kstrtol(buf, 10, &val) < 0 || val < 0 || val > 255)
915 mutex_lock(&data->update_lock);
916 if (has_newer_autopwm(data)) {
918 * If we are in automatic mode, the PWM duty cycle register
919 * is read-only so we can't write the value.
921 if (data->pwm_ctrl[nr] & 0x80) {
922 mutex_unlock(&data->update_lock);
925 data->pwm_duty[nr] = pwm_to_reg(data, val);
926 it87_write_value(data, IT87_REG_PWM_DUTY(nr),
929 data->pwm_duty[nr] = pwm_to_reg(data, val);
931 * If we are in manual mode, write the duty cycle immediately;
932 * otherwise, just store it for later use.
934 if (!(data->pwm_ctrl[nr] & 0x80)) {
935 data->pwm_ctrl[nr] = data->pwm_duty[nr];
936 it87_write_value(data, IT87_REG_PWM(nr),
940 mutex_unlock(&data->update_lock);
943 static ssize_t set_pwm_freq(struct device *dev,
944 struct device_attribute *attr, const char *buf, size_t count)
946 struct it87_data *data = dev_get_drvdata(dev);
950 if (kstrtoul(buf, 10, &val) < 0)
953 /* Search for the nearest available frequency */
954 for (i = 0; i < 7; i++) {
955 if (val > (pwm_freq[i] + pwm_freq[i+1]) / 2)
959 mutex_lock(&data->update_lock);
960 data->fan_ctl = it87_read_value(data, IT87_REG_FAN_CTL) & 0x8f;
961 data->fan_ctl |= i << 4;
962 it87_write_value(data, IT87_REG_FAN_CTL, data->fan_ctl);
963 mutex_unlock(&data->update_lock);
967 static ssize_t show_pwm_temp_map(struct device *dev,
968 struct device_attribute *attr, char *buf)
970 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
971 int nr = sensor_attr->index;
973 struct it87_data *data = it87_update_device(dev);
976 if (data->pwm_temp_map[nr] < 3)
977 map = 1 << data->pwm_temp_map[nr];
979 map = 0; /* Should never happen */
980 return sprintf(buf, "%d\n", map);
982 static ssize_t set_pwm_temp_map(struct device *dev,
983 struct device_attribute *attr, const char *buf, size_t count)
985 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
986 int nr = sensor_attr->index;
988 struct it87_data *data = dev_get_drvdata(dev);
993 * This check can go away if we ever support automatic fan speed
994 * control on newer chips.
996 if (!has_old_autopwm(data)) {
997 dev_notice(dev, "Mapping change disabled for safety reasons\n");
1001 if (kstrtol(buf, 10, &val) < 0)
1018 mutex_lock(&data->update_lock);
1019 data->pwm_temp_map[nr] = reg;
1021 * If we are in automatic mode, write the temp mapping immediately;
1022 * otherwise, just store it for later use.
1024 if (data->pwm_ctrl[nr] & 0x80) {
1025 data->pwm_ctrl[nr] = 0x80 | data->pwm_temp_map[nr];
1026 it87_write_value(data, IT87_REG_PWM(nr), data->pwm_ctrl[nr]);
1028 mutex_unlock(&data->update_lock);
1032 static ssize_t show_auto_pwm(struct device *dev,
1033 struct device_attribute *attr, char *buf)
1035 struct it87_data *data = it87_update_device(dev);
1036 struct sensor_device_attribute_2 *sensor_attr =
1037 to_sensor_dev_attr_2(attr);
1038 int nr = sensor_attr->nr;
1039 int point = sensor_attr->index;
1041 return sprintf(buf, "%d\n",
1042 pwm_from_reg(data, data->auto_pwm[nr][point]));
1045 static ssize_t set_auto_pwm(struct device *dev,
1046 struct device_attribute *attr, const char *buf, size_t count)
1048 struct it87_data *data = dev_get_drvdata(dev);
1049 struct sensor_device_attribute_2 *sensor_attr =
1050 to_sensor_dev_attr_2(attr);
1051 int nr = sensor_attr->nr;
1052 int point = sensor_attr->index;
1055 if (kstrtol(buf, 10, &val) < 0 || val < 0 || val > 255)
1058 mutex_lock(&data->update_lock);
1059 data->auto_pwm[nr][point] = pwm_to_reg(data, val);
1060 it87_write_value(data, IT87_REG_AUTO_PWM(nr, point),
1061 data->auto_pwm[nr][point]);
1062 mutex_unlock(&data->update_lock);
1066 static ssize_t show_auto_temp(struct device *dev,
1067 struct device_attribute *attr, char *buf)
1069 struct it87_data *data = it87_update_device(dev);
1070 struct sensor_device_attribute_2 *sensor_attr =
1071 to_sensor_dev_attr_2(attr);
1072 int nr = sensor_attr->nr;
1073 int point = sensor_attr->index;
1075 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->auto_temp[nr][point]));
1078 static ssize_t set_auto_temp(struct device *dev,
1079 struct device_attribute *attr, const char *buf, size_t count)
1081 struct it87_data *data = dev_get_drvdata(dev);
1082 struct sensor_device_attribute_2 *sensor_attr =
1083 to_sensor_dev_attr_2(attr);
1084 int nr = sensor_attr->nr;
1085 int point = sensor_attr->index;
1088 if (kstrtol(buf, 10, &val) < 0 || val < -128000 || val > 127000)
1091 mutex_lock(&data->update_lock);
1092 data->auto_temp[nr][point] = TEMP_TO_REG(val);
1093 it87_write_value(data, IT87_REG_AUTO_TEMP(nr, point),
1094 data->auto_temp[nr][point]);
1095 mutex_unlock(&data->update_lock);
1099 static SENSOR_DEVICE_ATTR_2(fan1_input, S_IRUGO, show_fan, NULL, 0, 0);
1100 static SENSOR_DEVICE_ATTR_2(fan1_min, S_IRUGO | S_IWUSR, show_fan, set_fan,
1102 static SENSOR_DEVICE_ATTR(fan1_div, S_IRUGO | S_IWUSR, show_fan_div,
1105 static SENSOR_DEVICE_ATTR_2(fan2_input, S_IRUGO, show_fan, NULL, 1, 0);
1106 static SENSOR_DEVICE_ATTR_2(fan2_min, S_IRUGO | S_IWUSR, show_fan, set_fan,
1108 static SENSOR_DEVICE_ATTR(fan2_div, S_IRUGO | S_IWUSR, show_fan_div,
1111 static SENSOR_DEVICE_ATTR_2(fan3_input, S_IRUGO, show_fan, NULL, 2, 0);
1112 static SENSOR_DEVICE_ATTR_2(fan3_min, S_IRUGO | S_IWUSR, show_fan, set_fan,
1114 static SENSOR_DEVICE_ATTR(fan3_div, S_IRUGO | S_IWUSR, show_fan_div,
1117 static SENSOR_DEVICE_ATTR_2(fan4_input, S_IRUGO, show_fan, NULL, 3, 0);
1118 static SENSOR_DEVICE_ATTR_2(fan4_min, S_IRUGO | S_IWUSR, show_fan, set_fan,
1121 static SENSOR_DEVICE_ATTR_2(fan5_input, S_IRUGO, show_fan, NULL, 4, 0);
1122 static SENSOR_DEVICE_ATTR_2(fan5_min, S_IRUGO | S_IWUSR, show_fan, set_fan,
1125 #define show_pwm_offset(offset) \
1126 static SENSOR_DEVICE_ATTR(pwm##offset##_enable, S_IRUGO | S_IWUSR, \
1127 show_pwm_enable, set_pwm_enable, offset - 1); \
1128 static SENSOR_DEVICE_ATTR(pwm##offset, S_IRUGO | S_IWUSR, \
1129 show_pwm, set_pwm, offset - 1); \
1130 static DEVICE_ATTR(pwm##offset##_freq, \
1131 (offset == 1 ? S_IRUGO | S_IWUSR : S_IRUGO), \
1132 show_pwm_freq, (offset == 1 ? set_pwm_freq : NULL)); \
1133 static SENSOR_DEVICE_ATTR(pwm##offset##_auto_channels_temp, \
1134 S_IRUGO | S_IWUSR, show_pwm_temp_map, set_pwm_temp_map, \
1136 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point1_pwm, \
1137 S_IRUGO | S_IWUSR, show_auto_pwm, set_auto_pwm, \
1139 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point2_pwm, \
1140 S_IRUGO | S_IWUSR, show_auto_pwm, set_auto_pwm, \
1142 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point3_pwm, \
1143 S_IRUGO | S_IWUSR, show_auto_pwm, set_auto_pwm, \
1145 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point4_pwm, \
1146 S_IRUGO, show_auto_pwm, NULL, offset - 1, 3); \
1147 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point1_temp, \
1148 S_IRUGO | S_IWUSR, show_auto_temp, set_auto_temp, \
1150 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point1_temp_hyst, \
1151 S_IRUGO | S_IWUSR, show_auto_temp, set_auto_temp, \
1153 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point2_temp, \
1154 S_IRUGO | S_IWUSR, show_auto_temp, set_auto_temp, \
1156 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point3_temp, \
1157 S_IRUGO | S_IWUSR, show_auto_temp, set_auto_temp, \
1159 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point4_temp, \
1160 S_IRUGO | S_IWUSR, show_auto_temp, set_auto_temp, \
1168 static ssize_t show_alarms(struct device *dev, struct device_attribute *attr,
1171 struct it87_data *data = it87_update_device(dev);
1172 return sprintf(buf, "%u\n", data->alarms);
1174 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
1176 static ssize_t show_alarm(struct device *dev, struct device_attribute *attr,
1179 int bitnr = to_sensor_dev_attr(attr)->index;
1180 struct it87_data *data = it87_update_device(dev);
1181 return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1);
1184 static ssize_t clear_intrusion(struct device *dev, struct device_attribute
1185 *attr, const char *buf, size_t count)
1187 struct it87_data *data = dev_get_drvdata(dev);
1191 if (kstrtol(buf, 10, &val) < 0 || val != 0)
1194 mutex_lock(&data->update_lock);
1195 config = it87_read_value(data, IT87_REG_CONFIG);
1200 it87_write_value(data, IT87_REG_CONFIG, config);
1201 /* Invalidate cache to force re-read */
1204 mutex_unlock(&data->update_lock);
1209 static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 8);
1210 static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 9);
1211 static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 10);
1212 static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 11);
1213 static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 12);
1214 static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 13);
1215 static SENSOR_DEVICE_ATTR(in6_alarm, S_IRUGO, show_alarm, NULL, 14);
1216 static SENSOR_DEVICE_ATTR(in7_alarm, S_IRUGO, show_alarm, NULL, 15);
1217 static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 0);
1218 static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 1);
1219 static SENSOR_DEVICE_ATTR(fan3_alarm, S_IRUGO, show_alarm, NULL, 2);
1220 static SENSOR_DEVICE_ATTR(fan4_alarm, S_IRUGO, show_alarm, NULL, 3);
1221 static SENSOR_DEVICE_ATTR(fan5_alarm, S_IRUGO, show_alarm, NULL, 6);
1222 static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 16);
1223 static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 17);
1224 static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL, 18);
1225 static SENSOR_DEVICE_ATTR(intrusion0_alarm, S_IRUGO | S_IWUSR,
1226 show_alarm, clear_intrusion, 4);
1228 static ssize_t show_beep(struct device *dev, struct device_attribute *attr,
1231 int bitnr = to_sensor_dev_attr(attr)->index;
1232 struct it87_data *data = it87_update_device(dev);
1233 return sprintf(buf, "%u\n", (data->beeps >> bitnr) & 1);
1235 static ssize_t set_beep(struct device *dev, struct device_attribute *attr,
1236 const char *buf, size_t count)
1238 int bitnr = to_sensor_dev_attr(attr)->index;
1239 struct it87_data *data = dev_get_drvdata(dev);
1242 if (kstrtol(buf, 10, &val) < 0
1243 || (val != 0 && val != 1))
1246 mutex_lock(&data->update_lock);
1247 data->beeps = it87_read_value(data, IT87_REG_BEEP_ENABLE);
1249 data->beeps |= (1 << bitnr);
1251 data->beeps &= ~(1 << bitnr);
1252 it87_write_value(data, IT87_REG_BEEP_ENABLE, data->beeps);
1253 mutex_unlock(&data->update_lock);
1257 static SENSOR_DEVICE_ATTR(in0_beep, S_IRUGO | S_IWUSR,
1258 show_beep, set_beep, 1);
1259 static SENSOR_DEVICE_ATTR(in1_beep, S_IRUGO, show_beep, NULL, 1);
1260 static SENSOR_DEVICE_ATTR(in2_beep, S_IRUGO, show_beep, NULL, 1);
1261 static SENSOR_DEVICE_ATTR(in3_beep, S_IRUGO, show_beep, NULL, 1);
1262 static SENSOR_DEVICE_ATTR(in4_beep, S_IRUGO, show_beep, NULL, 1);
1263 static SENSOR_DEVICE_ATTR(in5_beep, S_IRUGO, show_beep, NULL, 1);
1264 static SENSOR_DEVICE_ATTR(in6_beep, S_IRUGO, show_beep, NULL, 1);
1265 static SENSOR_DEVICE_ATTR(in7_beep, S_IRUGO, show_beep, NULL, 1);
1266 /* fanX_beep writability is set later */
1267 static SENSOR_DEVICE_ATTR(fan1_beep, S_IRUGO, show_beep, set_beep, 0);
1268 static SENSOR_DEVICE_ATTR(fan2_beep, S_IRUGO, show_beep, set_beep, 0);
1269 static SENSOR_DEVICE_ATTR(fan3_beep, S_IRUGO, show_beep, set_beep, 0);
1270 static SENSOR_DEVICE_ATTR(fan4_beep, S_IRUGO, show_beep, set_beep, 0);
1271 static SENSOR_DEVICE_ATTR(fan5_beep, S_IRUGO, show_beep, set_beep, 0);
1272 static SENSOR_DEVICE_ATTR(temp1_beep, S_IRUGO | S_IWUSR,
1273 show_beep, set_beep, 2);
1274 static SENSOR_DEVICE_ATTR(temp2_beep, S_IRUGO, show_beep, NULL, 2);
1275 static SENSOR_DEVICE_ATTR(temp3_beep, S_IRUGO, show_beep, NULL, 2);
1277 static ssize_t show_vrm_reg(struct device *dev, struct device_attribute *attr,
1280 struct it87_data *data = dev_get_drvdata(dev);
1281 return sprintf(buf, "%u\n", data->vrm);
1283 static ssize_t store_vrm_reg(struct device *dev, struct device_attribute *attr,
1284 const char *buf, size_t count)
1286 struct it87_data *data = dev_get_drvdata(dev);
1289 if (kstrtoul(buf, 10, &val) < 0)
1296 static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm_reg, store_vrm_reg);
1298 static ssize_t show_vid_reg(struct device *dev, struct device_attribute *attr,
1301 struct it87_data *data = it87_update_device(dev);
1302 return sprintf(buf, "%ld\n", (long) vid_from_reg(data->vid, data->vrm));
1304 static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid_reg, NULL);
1306 static ssize_t show_label(struct device *dev, struct device_attribute *attr,
1309 static const char * const labels[] = {
1314 static const char * const labels_it8721[] = {
1319 struct it87_data *data = dev_get_drvdata(dev);
1320 int nr = to_sensor_dev_attr(attr)->index;
1322 return sprintf(buf, "%s\n", has_12mv_adc(data) ? labels_it8721[nr]
1325 static SENSOR_DEVICE_ATTR(in3_label, S_IRUGO, show_label, NULL, 0);
1326 static SENSOR_DEVICE_ATTR(in7_label, S_IRUGO, show_label, NULL, 1);
1327 static SENSOR_DEVICE_ATTR(in8_label, S_IRUGO, show_label, NULL, 2);
1329 static ssize_t show_name(struct device *dev, struct device_attribute
1330 *devattr, char *buf)
1332 struct it87_data *data = dev_get_drvdata(dev);
1333 return sprintf(buf, "%s\n", data->name);
1335 static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
1337 static struct attribute *it87_attributes_in[9][5] = {
1339 &sensor_dev_attr_in0_input.dev_attr.attr,
1340 &sensor_dev_attr_in0_min.dev_attr.attr,
1341 &sensor_dev_attr_in0_max.dev_attr.attr,
1342 &sensor_dev_attr_in0_alarm.dev_attr.attr,
1345 &sensor_dev_attr_in1_input.dev_attr.attr,
1346 &sensor_dev_attr_in1_min.dev_attr.attr,
1347 &sensor_dev_attr_in1_max.dev_attr.attr,
1348 &sensor_dev_attr_in1_alarm.dev_attr.attr,
1351 &sensor_dev_attr_in2_input.dev_attr.attr,
1352 &sensor_dev_attr_in2_min.dev_attr.attr,
1353 &sensor_dev_attr_in2_max.dev_attr.attr,
1354 &sensor_dev_attr_in2_alarm.dev_attr.attr,
1357 &sensor_dev_attr_in3_input.dev_attr.attr,
1358 &sensor_dev_attr_in3_min.dev_attr.attr,
1359 &sensor_dev_attr_in3_max.dev_attr.attr,
1360 &sensor_dev_attr_in3_alarm.dev_attr.attr,
1363 &sensor_dev_attr_in4_input.dev_attr.attr,
1364 &sensor_dev_attr_in4_min.dev_attr.attr,
1365 &sensor_dev_attr_in4_max.dev_attr.attr,
1366 &sensor_dev_attr_in4_alarm.dev_attr.attr,
1369 &sensor_dev_attr_in5_input.dev_attr.attr,
1370 &sensor_dev_attr_in5_min.dev_attr.attr,
1371 &sensor_dev_attr_in5_max.dev_attr.attr,
1372 &sensor_dev_attr_in5_alarm.dev_attr.attr,
1375 &sensor_dev_attr_in6_input.dev_attr.attr,
1376 &sensor_dev_attr_in6_min.dev_attr.attr,
1377 &sensor_dev_attr_in6_max.dev_attr.attr,
1378 &sensor_dev_attr_in6_alarm.dev_attr.attr,
1381 &sensor_dev_attr_in7_input.dev_attr.attr,
1382 &sensor_dev_attr_in7_min.dev_attr.attr,
1383 &sensor_dev_attr_in7_max.dev_attr.attr,
1384 &sensor_dev_attr_in7_alarm.dev_attr.attr,
1387 &sensor_dev_attr_in8_input.dev_attr.attr,
1391 static const struct attribute_group it87_group_in[9] = {
1392 { .attrs = it87_attributes_in[0] },
1393 { .attrs = it87_attributes_in[1] },
1394 { .attrs = it87_attributes_in[2] },
1395 { .attrs = it87_attributes_in[3] },
1396 { .attrs = it87_attributes_in[4] },
1397 { .attrs = it87_attributes_in[5] },
1398 { .attrs = it87_attributes_in[6] },
1399 { .attrs = it87_attributes_in[7] },
1400 { .attrs = it87_attributes_in[8] },
1403 static struct attribute *it87_attributes_temp[3][6] = {
1405 &sensor_dev_attr_temp1_input.dev_attr.attr,
1406 &sensor_dev_attr_temp1_max.dev_attr.attr,
1407 &sensor_dev_attr_temp1_min.dev_attr.attr,
1408 &sensor_dev_attr_temp1_type.dev_attr.attr,
1409 &sensor_dev_attr_temp1_alarm.dev_attr.attr,
1412 &sensor_dev_attr_temp2_input.dev_attr.attr,
1413 &sensor_dev_attr_temp2_max.dev_attr.attr,
1414 &sensor_dev_attr_temp2_min.dev_attr.attr,
1415 &sensor_dev_attr_temp2_type.dev_attr.attr,
1416 &sensor_dev_attr_temp2_alarm.dev_attr.attr,
1419 &sensor_dev_attr_temp3_input.dev_attr.attr,
1420 &sensor_dev_attr_temp3_max.dev_attr.attr,
1421 &sensor_dev_attr_temp3_min.dev_attr.attr,
1422 &sensor_dev_attr_temp3_type.dev_attr.attr,
1423 &sensor_dev_attr_temp3_alarm.dev_attr.attr,
1427 static const struct attribute_group it87_group_temp[3] = {
1428 { .attrs = it87_attributes_temp[0] },
1429 { .attrs = it87_attributes_temp[1] },
1430 { .attrs = it87_attributes_temp[2] },
1433 static struct attribute *it87_attributes_temp_offset[] = {
1434 &sensor_dev_attr_temp1_offset.dev_attr.attr,
1435 &sensor_dev_attr_temp2_offset.dev_attr.attr,
1436 &sensor_dev_attr_temp3_offset.dev_attr.attr,
1439 static struct attribute *it87_attributes[] = {
1440 &dev_attr_alarms.attr,
1441 &sensor_dev_attr_intrusion0_alarm.dev_attr.attr,
1442 &dev_attr_name.attr,
1446 static const struct attribute_group it87_group = {
1447 .attrs = it87_attributes,
1450 static struct attribute *it87_attributes_in_beep[] = {
1451 &sensor_dev_attr_in0_beep.dev_attr.attr,
1452 &sensor_dev_attr_in1_beep.dev_attr.attr,
1453 &sensor_dev_attr_in2_beep.dev_attr.attr,
1454 &sensor_dev_attr_in3_beep.dev_attr.attr,
1455 &sensor_dev_attr_in4_beep.dev_attr.attr,
1456 &sensor_dev_attr_in5_beep.dev_attr.attr,
1457 &sensor_dev_attr_in6_beep.dev_attr.attr,
1458 &sensor_dev_attr_in7_beep.dev_attr.attr,
1462 static struct attribute *it87_attributes_temp_beep[] = {
1463 &sensor_dev_attr_temp1_beep.dev_attr.attr,
1464 &sensor_dev_attr_temp2_beep.dev_attr.attr,
1465 &sensor_dev_attr_temp3_beep.dev_attr.attr,
1468 static struct attribute *it87_attributes_fan[5][3+1] = { {
1469 &sensor_dev_attr_fan1_input.dev_attr.attr,
1470 &sensor_dev_attr_fan1_min.dev_attr.attr,
1471 &sensor_dev_attr_fan1_alarm.dev_attr.attr,
1474 &sensor_dev_attr_fan2_input.dev_attr.attr,
1475 &sensor_dev_attr_fan2_min.dev_attr.attr,
1476 &sensor_dev_attr_fan2_alarm.dev_attr.attr,
1479 &sensor_dev_attr_fan3_input.dev_attr.attr,
1480 &sensor_dev_attr_fan3_min.dev_attr.attr,
1481 &sensor_dev_attr_fan3_alarm.dev_attr.attr,
1484 &sensor_dev_attr_fan4_input.dev_attr.attr,
1485 &sensor_dev_attr_fan4_min.dev_attr.attr,
1486 &sensor_dev_attr_fan4_alarm.dev_attr.attr,
1489 &sensor_dev_attr_fan5_input.dev_attr.attr,
1490 &sensor_dev_attr_fan5_min.dev_attr.attr,
1491 &sensor_dev_attr_fan5_alarm.dev_attr.attr,
1495 static const struct attribute_group it87_group_fan[5] = {
1496 { .attrs = it87_attributes_fan[0] },
1497 { .attrs = it87_attributes_fan[1] },
1498 { .attrs = it87_attributes_fan[2] },
1499 { .attrs = it87_attributes_fan[3] },
1500 { .attrs = it87_attributes_fan[4] },
1503 static const struct attribute *it87_attributes_fan_div[] = {
1504 &sensor_dev_attr_fan1_div.dev_attr.attr,
1505 &sensor_dev_attr_fan2_div.dev_attr.attr,
1506 &sensor_dev_attr_fan3_div.dev_attr.attr,
1509 static struct attribute *it87_attributes_pwm[3][4+1] = { {
1510 &sensor_dev_attr_pwm1_enable.dev_attr.attr,
1511 &sensor_dev_attr_pwm1.dev_attr.attr,
1512 &dev_attr_pwm1_freq.attr,
1513 &sensor_dev_attr_pwm1_auto_channels_temp.dev_attr.attr,
1516 &sensor_dev_attr_pwm2_enable.dev_attr.attr,
1517 &sensor_dev_attr_pwm2.dev_attr.attr,
1518 &dev_attr_pwm2_freq.attr,
1519 &sensor_dev_attr_pwm2_auto_channels_temp.dev_attr.attr,
1522 &sensor_dev_attr_pwm3_enable.dev_attr.attr,
1523 &sensor_dev_attr_pwm3.dev_attr.attr,
1524 &dev_attr_pwm3_freq.attr,
1525 &sensor_dev_attr_pwm3_auto_channels_temp.dev_attr.attr,
1529 static const struct attribute_group it87_group_pwm[3] = {
1530 { .attrs = it87_attributes_pwm[0] },
1531 { .attrs = it87_attributes_pwm[1] },
1532 { .attrs = it87_attributes_pwm[2] },
1535 static struct attribute *it87_attributes_autopwm[3][9+1] = { {
1536 &sensor_dev_attr_pwm1_auto_point1_pwm.dev_attr.attr,
1537 &sensor_dev_attr_pwm1_auto_point2_pwm.dev_attr.attr,
1538 &sensor_dev_attr_pwm1_auto_point3_pwm.dev_attr.attr,
1539 &sensor_dev_attr_pwm1_auto_point4_pwm.dev_attr.attr,
1540 &sensor_dev_attr_pwm1_auto_point1_temp.dev_attr.attr,
1541 &sensor_dev_attr_pwm1_auto_point1_temp_hyst.dev_attr.attr,
1542 &sensor_dev_attr_pwm1_auto_point2_temp.dev_attr.attr,
1543 &sensor_dev_attr_pwm1_auto_point3_temp.dev_attr.attr,
1544 &sensor_dev_attr_pwm1_auto_point4_temp.dev_attr.attr,
1547 &sensor_dev_attr_pwm2_auto_point1_pwm.dev_attr.attr,
1548 &sensor_dev_attr_pwm2_auto_point2_pwm.dev_attr.attr,
1549 &sensor_dev_attr_pwm2_auto_point3_pwm.dev_attr.attr,
1550 &sensor_dev_attr_pwm2_auto_point4_pwm.dev_attr.attr,
1551 &sensor_dev_attr_pwm2_auto_point1_temp.dev_attr.attr,
1552 &sensor_dev_attr_pwm2_auto_point1_temp_hyst.dev_attr.attr,
1553 &sensor_dev_attr_pwm2_auto_point2_temp.dev_attr.attr,
1554 &sensor_dev_attr_pwm2_auto_point3_temp.dev_attr.attr,
1555 &sensor_dev_attr_pwm2_auto_point4_temp.dev_attr.attr,
1558 &sensor_dev_attr_pwm3_auto_point1_pwm.dev_attr.attr,
1559 &sensor_dev_attr_pwm3_auto_point2_pwm.dev_attr.attr,
1560 &sensor_dev_attr_pwm3_auto_point3_pwm.dev_attr.attr,
1561 &sensor_dev_attr_pwm3_auto_point4_pwm.dev_attr.attr,
1562 &sensor_dev_attr_pwm3_auto_point1_temp.dev_attr.attr,
1563 &sensor_dev_attr_pwm3_auto_point1_temp_hyst.dev_attr.attr,
1564 &sensor_dev_attr_pwm3_auto_point2_temp.dev_attr.attr,
1565 &sensor_dev_attr_pwm3_auto_point3_temp.dev_attr.attr,
1566 &sensor_dev_attr_pwm3_auto_point4_temp.dev_attr.attr,
1570 static const struct attribute_group it87_group_autopwm[3] = {
1571 { .attrs = it87_attributes_autopwm[0] },
1572 { .attrs = it87_attributes_autopwm[1] },
1573 { .attrs = it87_attributes_autopwm[2] },
1576 static struct attribute *it87_attributes_fan_beep[] = {
1577 &sensor_dev_attr_fan1_beep.dev_attr.attr,
1578 &sensor_dev_attr_fan2_beep.dev_attr.attr,
1579 &sensor_dev_attr_fan3_beep.dev_attr.attr,
1580 &sensor_dev_attr_fan4_beep.dev_attr.attr,
1581 &sensor_dev_attr_fan5_beep.dev_attr.attr,
1584 static struct attribute *it87_attributes_vid[] = {
1586 &dev_attr_cpu0_vid.attr,
1590 static const struct attribute_group it87_group_vid = {
1591 .attrs = it87_attributes_vid,
1594 static struct attribute *it87_attributes_label[] = {
1595 &sensor_dev_attr_in3_label.dev_attr.attr,
1596 &sensor_dev_attr_in7_label.dev_attr.attr,
1597 &sensor_dev_attr_in8_label.dev_attr.attr,
1601 static const struct attribute_group it87_group_label = {
1602 .attrs = it87_attributes_label,
1605 /* SuperIO detection - will change isa_address if a chip is found */
1606 static int __init it87_find(unsigned short *address,
1607 struct it87_sio_data *sio_data)
1611 const char *board_vendor, *board_name;
1613 err = superio_enter();
1618 chip_type = force_id ? force_id : superio_inw(DEVID);
1620 switch (chip_type) {
1622 sio_data->type = it87;
1625 sio_data->type = it8712;
1629 sio_data->type = it8716;
1632 sio_data->type = it8718;
1635 sio_data->type = it8720;
1638 sio_data->type = it8721;
1641 sio_data->type = it8728;
1644 sio_data->type = it8782;
1647 sio_data->type = it8783;
1649 case 0xffff: /* No device at all */
1652 pr_debug("Unsupported chip (DEVID=0x%x)\n", chip_type);
1656 superio_select(PME);
1657 if (!(superio_inb(IT87_ACT_REG) & 0x01)) {
1658 pr_info("Device not activated, skipping\n");
1662 *address = superio_inw(IT87_BASE_REG) & ~(IT87_EXTENT - 1);
1663 if (*address == 0) {
1664 pr_info("Base address not set, skipping\n");
1669 sio_data->revision = superio_inb(DEVREV) & 0x0f;
1670 pr_info("Found IT%04xF chip at 0x%x, revision %d\n",
1671 chip_type, *address, sio_data->revision);
1673 /* in8 (Vbat) is always internal */
1674 sio_data->internal = (1 << 2);
1676 /* Read GPIO config and VID value from LDN 7 (GPIO) */
1677 if (sio_data->type == it87) {
1678 /* The IT8705F doesn't have VID pins at all */
1679 sio_data->skip_vid = 1;
1681 /* The IT8705F has a different LD number for GPIO */
1683 sio_data->beep_pin = superio_inb(IT87_SIO_BEEP_PIN_REG) & 0x3f;
1684 } else if (sio_data->type == it8783) {
1685 int reg25, reg27, reg2A, reg2C, regEF;
1687 sio_data->skip_vid = 1; /* No VID */
1689 superio_select(GPIO);
1691 reg25 = superio_inb(IT87_SIO_GPIO1_REG);
1692 reg27 = superio_inb(IT87_SIO_GPIO3_REG);
1693 reg2A = superio_inb(IT87_SIO_PINX1_REG);
1694 reg2C = superio_inb(IT87_SIO_PINX2_REG);
1695 regEF = superio_inb(IT87_SIO_SPI_REG);
1697 /* Check if fan3 is there or not */
1698 if ((reg27 & (1 << 0)) || !(reg2C & (1 << 2)))
1699 sio_data->skip_fan |= (1 << 2);
1700 if ((reg25 & (1 << 4))
1701 || (!(reg2A & (1 << 1)) && (regEF & (1 << 0))))
1702 sio_data->skip_pwm |= (1 << 2);
1704 /* Check if fan2 is there or not */
1705 if (reg27 & (1 << 7))
1706 sio_data->skip_fan |= (1 << 1);
1707 if (reg27 & (1 << 3))
1708 sio_data->skip_pwm |= (1 << 1);
1711 if ((reg27 & (1 << 0)) || (reg2C & (1 << 2)))
1712 sio_data->skip_in |= (1 << 5); /* No VIN5 */
1715 if (reg27 & (1 << 1))
1716 sio_data->skip_in |= (1 << 6); /* No VIN6 */
1720 * Does not depend on bit 2 of Reg2C, contrary to datasheet.
1722 if (reg27 & (1 << 2)) {
1724 * The data sheet is a bit unclear regarding the
1725 * internal voltage divider for VCCH5V. It says
1726 * "This bit enables and switches VIN7 (pin 91) to the
1727 * internal voltage divider for VCCH5V".
1728 * This is different to other chips, where the internal
1729 * voltage divider would connect VIN7 to an internal
1730 * voltage source. Maybe that is the case here as well.
1732 * Since we don't know for sure, re-route it if that is
1733 * not the case, and ask the user to report if the
1734 * resulting voltage is sane.
1736 if (!(reg2C & (1 << 1))) {
1738 superio_outb(IT87_SIO_PINX2_REG, reg2C);
1739 pr_notice("Routing internal VCCH5V to in7.\n");
1741 pr_notice("in7 routed to internal voltage divider, with external pin disabled.\n");
1742 pr_notice("Please report if it displays a reasonable voltage.\n");
1745 if (reg2C & (1 << 0))
1746 sio_data->internal |= (1 << 0);
1747 if (reg2C & (1 << 1))
1748 sio_data->internal |= (1 << 1);
1750 sio_data->beep_pin = superio_inb(IT87_SIO_BEEP_PIN_REG) & 0x3f;
1756 superio_select(GPIO);
1758 reg = superio_inb(IT87_SIO_GPIO3_REG);
1759 if (sio_data->type == it8721 || sio_data->type == it8728 ||
1760 sio_data->type == it8782) {
1762 * IT8721F/IT8758E, and IT8782F don't have VID pins
1763 * at all, not sure about the IT8728F.
1765 sio_data->skip_vid = 1;
1767 /* We need at least 4 VID pins */
1769 pr_info("VID is disabled (pins used for GPIO)\n");
1770 sio_data->skip_vid = 1;
1774 /* Check if fan3 is there or not */
1776 sio_data->skip_pwm |= (1 << 2);
1778 sio_data->skip_fan |= (1 << 2);
1780 /* Check if fan2 is there or not */
1781 reg = superio_inb(IT87_SIO_GPIO5_REG);
1783 sio_data->skip_pwm |= (1 << 1);
1785 sio_data->skip_fan |= (1 << 1);
1787 if ((sio_data->type == it8718 || sio_data->type == it8720)
1788 && !(sio_data->skip_vid))
1789 sio_data->vid_value = superio_inb(IT87_SIO_VID_REG);
1791 reg = superio_inb(IT87_SIO_PINX2_REG);
1793 uart6 = sio_data->type == it8782 && (reg & (1 << 2));
1796 * The IT8720F has no VIN7 pin, so VCCH should always be
1797 * routed internally to VIN7 with an internal divider.
1798 * Curiously, there still is a configuration bit to control
1799 * this, which means it can be set incorrectly. And even
1800 * more curiously, many boards out there are improperly
1801 * configured, even though the IT8720F datasheet claims
1802 * that the internal routing of VCCH to VIN7 is the default
1803 * setting. So we force the internal routing in this case.
1805 * On IT8782F, VIN7 is multiplexed with one of the UART6 pins.
1806 * If UART6 is enabled, re-route VIN7 to the internal divider
1807 * if that is not already the case.
1809 if ((sio_data->type == it8720 || uart6) && !(reg & (1 << 1))) {
1811 superio_outb(IT87_SIO_PINX2_REG, reg);
1812 pr_notice("Routing internal VCCH to in7\n");
1815 sio_data->internal |= (1 << 0);
1816 if ((reg & (1 << 1)) || sio_data->type == it8721 ||
1817 sio_data->type == it8728)
1818 sio_data->internal |= (1 << 1);
1821 * On IT8782F, UART6 pins overlap with VIN5, VIN6, and VIN7.
1822 * While VIN7 can be routed to the internal voltage divider,
1823 * VIN5 and VIN6 are not available if UART6 is enabled.
1825 * Also, temp3 is not available if UART6 is enabled and TEMPIN3
1826 * is the temperature source. Since we can not read the
1827 * temperature source here, skip_temp is preliminary.
1830 sio_data->skip_in |= (1 << 5) | (1 << 6);
1831 sio_data->skip_temp |= (1 << 2);
1834 sio_data->beep_pin = superio_inb(IT87_SIO_BEEP_PIN_REG) & 0x3f;
1836 if (sio_data->beep_pin)
1837 pr_info("Beeping is supported\n");
1839 /* Disable specific features based on DMI strings */
1840 board_vendor = dmi_get_system_info(DMI_BOARD_VENDOR);
1841 board_name = dmi_get_system_info(DMI_BOARD_NAME);
1842 if (board_vendor && board_name) {
1843 if (strcmp(board_vendor, "nVIDIA") == 0
1844 && strcmp(board_name, "FN68PT") == 0) {
1846 * On the Shuttle SN68PT, FAN_CTL2 is apparently not
1847 * connected to a fan, but to something else. One user
1848 * has reported instant system power-off when changing
1849 * the PWM2 duty cycle, so we disable it.
1850 * I use the board name string as the trigger in case
1851 * the same board is ever used in other systems.
1853 pr_info("Disabling pwm2 due to hardware constraints\n");
1854 sio_data->skip_pwm = (1 << 1);
1863 static void it87_remove_files(struct device *dev)
1865 struct it87_data *data = platform_get_drvdata(pdev);
1866 struct it87_sio_data *sio_data = dev->platform_data;
1869 sysfs_remove_group(&dev->kobj, &it87_group);
1870 for (i = 0; i < 9; i++) {
1871 if (sio_data->skip_in & (1 << i))
1873 sysfs_remove_group(&dev->kobj, &it87_group_in[i]);
1874 if (it87_attributes_in_beep[i])
1875 sysfs_remove_file(&dev->kobj,
1876 it87_attributes_in_beep[i]);
1878 for (i = 0; i < 3; i++) {
1879 if (!(data->has_temp & (1 << i)))
1881 sysfs_remove_group(&dev->kobj, &it87_group_temp[i]);
1882 if (has_temp_offset(data))
1883 sysfs_remove_file(&dev->kobj,
1884 it87_attributes_temp_offset[i]);
1885 if (sio_data->beep_pin)
1886 sysfs_remove_file(&dev->kobj,
1887 it87_attributes_temp_beep[i]);
1889 for (i = 0; i < 5; i++) {
1890 if (!(data->has_fan & (1 << i)))
1892 sysfs_remove_group(&dev->kobj, &it87_group_fan[i]);
1893 if (sio_data->beep_pin)
1894 sysfs_remove_file(&dev->kobj,
1895 it87_attributes_fan_beep[i]);
1896 if (i < 3 && !has_16bit_fans(data))
1897 sysfs_remove_file(&dev->kobj,
1898 it87_attributes_fan_div[i]);
1900 for (i = 0; i < 3; i++) {
1901 if (sio_data->skip_pwm & (1 << 0))
1903 sysfs_remove_group(&dev->kobj, &it87_group_pwm[i]);
1904 if (has_old_autopwm(data))
1905 sysfs_remove_group(&dev->kobj,
1906 &it87_group_autopwm[i]);
1908 if (!sio_data->skip_vid)
1909 sysfs_remove_group(&dev->kobj, &it87_group_vid);
1910 sysfs_remove_group(&dev->kobj, &it87_group_label);
1913 static int it87_probe(struct platform_device *pdev)
1915 struct it87_data *data;
1916 struct resource *res;
1917 struct device *dev = &pdev->dev;
1918 struct it87_sio_data *sio_data = dev->platform_data;
1920 int enable_pwm_interface;
1921 int fan_beep_need_rw;
1922 static const char * const names[] = {
1934 res = platform_get_resource(pdev, IORESOURCE_IO, 0);
1935 if (!devm_request_region(&pdev->dev, res->start, IT87_EC_EXTENT,
1937 dev_err(dev, "Failed to request region 0x%lx-0x%lx\n",
1938 (unsigned long)res->start,
1939 (unsigned long)(res->start + IT87_EC_EXTENT - 1));
1943 data = devm_kzalloc(&pdev->dev, sizeof(struct it87_data), GFP_KERNEL);
1947 data->addr = res->start;
1948 data->type = sio_data->type;
1949 data->revision = sio_data->revision;
1950 data->name = names[sio_data->type];
1952 /* Now, we do the remaining detection. */
1953 if ((it87_read_value(data, IT87_REG_CONFIG) & 0x80)
1954 || it87_read_value(data, IT87_REG_CHIPID) != 0x90)
1957 platform_set_drvdata(pdev, data);
1959 mutex_init(&data->update_lock);
1961 /* Check PWM configuration */
1962 enable_pwm_interface = it87_check_pwm(dev);
1964 /* Starting with IT8721F, we handle scaling of internal voltages */
1965 if (has_12mv_adc(data)) {
1966 if (sio_data->internal & (1 << 0))
1967 data->in_scaled |= (1 << 3); /* in3 is AVCC */
1968 if (sio_data->internal & (1 << 1))
1969 data->in_scaled |= (1 << 7); /* in7 is VSB */
1970 if (sio_data->internal & (1 << 2))
1971 data->in_scaled |= (1 << 8); /* in8 is Vbat */
1972 } else if (sio_data->type == it8782 || sio_data->type == it8783) {
1973 if (sio_data->internal & (1 << 0))
1974 data->in_scaled |= (1 << 3); /* in3 is VCC5V */
1975 if (sio_data->internal & (1 << 1))
1976 data->in_scaled |= (1 << 7); /* in7 is VCCH5V */
1979 data->has_temp = 0x07;
1980 if (sio_data->skip_temp & (1 << 2)) {
1981 if (sio_data->type == it8782
1982 && !(it87_read_value(data, IT87_REG_TEMP_EXTRA) & 0x80))
1983 data->has_temp &= ~(1 << 2);
1986 /* Initialize the IT87 chip */
1987 it87_init_device(pdev);
1989 /* Register sysfs hooks */
1990 err = sysfs_create_group(&dev->kobj, &it87_group);
1994 for (i = 0; i < 9; i++) {
1995 if (sio_data->skip_in & (1 << i))
1997 err = sysfs_create_group(&dev->kobj, &it87_group_in[i]);
2000 if (sio_data->beep_pin && it87_attributes_in_beep[i]) {
2001 err = sysfs_create_file(&dev->kobj,
2002 it87_attributes_in_beep[i]);
2008 for (i = 0; i < 3; i++) {
2009 if (!(data->has_temp & (1 << i)))
2011 err = sysfs_create_group(&dev->kobj, &it87_group_temp[i]);
2014 if (has_temp_offset(data)) {
2015 err = sysfs_create_file(&dev->kobj,
2016 it87_attributes_temp_offset[i]);
2020 if (sio_data->beep_pin) {
2021 err = sysfs_create_file(&dev->kobj,
2022 it87_attributes_temp_beep[i]);
2028 /* Do not create fan files for disabled fans */
2029 fan_beep_need_rw = 1;
2030 for (i = 0; i < 5; i++) {
2031 if (!(data->has_fan & (1 << i)))
2033 err = sysfs_create_group(&dev->kobj, &it87_group_fan[i]);
2037 if (i < 3 && !has_16bit_fans(data)) {
2038 err = sysfs_create_file(&dev->kobj,
2039 it87_attributes_fan_div[i]);
2044 if (sio_data->beep_pin) {
2045 err = sysfs_create_file(&dev->kobj,
2046 it87_attributes_fan_beep[i]);
2049 if (!fan_beep_need_rw)
2053 * As we have a single beep enable bit for all fans,
2054 * only the first enabled fan has a writable attribute
2057 if (sysfs_chmod_file(&dev->kobj,
2058 it87_attributes_fan_beep[i],
2060 dev_dbg(dev, "chmod +w fan%d_beep failed\n",
2062 fan_beep_need_rw = 0;
2066 if (enable_pwm_interface) {
2067 for (i = 0; i < 3; i++) {
2068 if (sio_data->skip_pwm & (1 << i))
2070 err = sysfs_create_group(&dev->kobj,
2071 &it87_group_pwm[i]);
2075 if (!has_old_autopwm(data))
2077 err = sysfs_create_group(&dev->kobj,
2078 &it87_group_autopwm[i]);
2084 if (!sio_data->skip_vid) {
2085 data->vrm = vid_which_vrm();
2086 /* VID reading from Super-I/O config space if available */
2087 data->vid = sio_data->vid_value;
2088 err = sysfs_create_group(&dev->kobj, &it87_group_vid);
2093 /* Export labels for internal sensors */
2094 for (i = 0; i < 3; i++) {
2095 if (!(sio_data->internal & (1 << i)))
2097 err = sysfs_create_file(&dev->kobj,
2098 it87_attributes_label[i]);
2103 data->hwmon_dev = hwmon_device_register(dev);
2104 if (IS_ERR(data->hwmon_dev)) {
2105 err = PTR_ERR(data->hwmon_dev);
2112 it87_remove_files(dev);
2116 static int it87_remove(struct platform_device *pdev)
2118 struct it87_data *data = platform_get_drvdata(pdev);
2120 hwmon_device_unregister(data->hwmon_dev);
2121 it87_remove_files(&pdev->dev);
2127 * Must be called with data->update_lock held, except during initialization.
2128 * We ignore the IT87 BUSY flag at this moment - it could lead to deadlocks,
2129 * would slow down the IT87 access and should not be necessary.
2131 static int it87_read_value(struct it87_data *data, u8 reg)
2133 outb_p(reg, data->addr + IT87_ADDR_REG_OFFSET);
2134 return inb_p(data->addr + IT87_DATA_REG_OFFSET);
2138 * Must be called with data->update_lock held, except during initialization.
2139 * We ignore the IT87 BUSY flag at this moment - it could lead to deadlocks,
2140 * would slow down the IT87 access and should not be necessary.
2142 static void it87_write_value(struct it87_data *data, u8 reg, u8 value)
2144 outb_p(reg, data->addr + IT87_ADDR_REG_OFFSET);
2145 outb_p(value, data->addr + IT87_DATA_REG_OFFSET);
2148 /* Return 1 if and only if the PWM interface is safe to use */
2149 static int it87_check_pwm(struct device *dev)
2151 struct it87_data *data = dev_get_drvdata(dev);
2153 * Some BIOSes fail to correctly configure the IT87 fans. All fans off
2154 * and polarity set to active low is sign that this is the case so we
2155 * disable pwm control to protect the user.
2157 int tmp = it87_read_value(data, IT87_REG_FAN_CTL);
2158 if ((tmp & 0x87) == 0) {
2159 if (fix_pwm_polarity) {
2161 * The user asks us to attempt a chip reconfiguration.
2162 * This means switching to active high polarity and
2163 * inverting all fan speed values.
2168 for (i = 0; i < 3; i++)
2169 pwm[i] = it87_read_value(data,
2173 * If any fan is in automatic pwm mode, the polarity
2174 * might be correct, as suspicious as it seems, so we
2175 * better don't change anything (but still disable the
2178 if (!((pwm[0] | pwm[1] | pwm[2]) & 0x80)) {
2179 dev_info(dev, "Reconfiguring PWM to "
2180 "active high polarity\n");
2181 it87_write_value(data, IT87_REG_FAN_CTL,
2183 for (i = 0; i < 3; i++)
2184 it87_write_value(data,
2190 dev_info(dev, "PWM configuration is "
2191 "too broken to be fixed\n");
2194 dev_info(dev, "Detected broken BIOS "
2195 "defaults, disabling PWM interface\n");
2197 } else if (fix_pwm_polarity) {
2198 dev_info(dev, "PWM configuration looks "
2199 "sane, won't touch\n");
2205 /* Called when we have found a new IT87. */
2206 static void it87_init_device(struct platform_device *pdev)
2208 struct it87_sio_data *sio_data = pdev->dev.platform_data;
2209 struct it87_data *data = platform_get_drvdata(pdev);
2214 * For each PWM channel:
2215 * - If it is in automatic mode, setting to manual mode should set
2216 * the fan to full speed by default.
2217 * - If it is in manual mode, we need a mapping to temperature
2218 * channels to use when later setting to automatic mode later.
2219 * Use a 1:1 mapping by default (we are clueless.)
2220 * In both cases, the value can (and should) be changed by the user
2221 * prior to switching to a different mode.
2222 * Note that this is no longer needed for the IT8721F and later, as
2223 * these have separate registers for the temperature mapping and the
2224 * manual duty cycle.
2226 for (i = 0; i < 3; i++) {
2227 data->pwm_temp_map[i] = i;
2228 data->pwm_duty[i] = 0x7f; /* Full speed */
2229 data->auto_pwm[i][3] = 0x7f; /* Full speed, hard-coded */
2233 * Some chips seem to have default value 0xff for all limit
2234 * registers. For low voltage limits it makes no sense and triggers
2235 * alarms, so change to 0 instead. For high temperature limits, it
2236 * means -1 degree C, which surprisingly doesn't trigger an alarm,
2237 * but is still confusing, so change to 127 degrees C.
2239 for (i = 0; i < 8; i++) {
2240 tmp = it87_read_value(data, IT87_REG_VIN_MIN(i));
2242 it87_write_value(data, IT87_REG_VIN_MIN(i), 0);
2244 for (i = 0; i < 3; i++) {
2245 tmp = it87_read_value(data, IT87_REG_TEMP_HIGH(i));
2247 it87_write_value(data, IT87_REG_TEMP_HIGH(i), 127);
2251 * Temperature channels are not forcibly enabled, as they can be
2252 * set to two different sensor types and we can't guess which one
2253 * is correct for a given system. These channels can be enabled at
2254 * run-time through the temp{1-3}_type sysfs accessors if needed.
2257 /* Check if voltage monitors are reset manually or by some reason */
2258 tmp = it87_read_value(data, IT87_REG_VIN_ENABLE);
2259 if ((tmp & 0xff) == 0) {
2260 /* Enable all voltage monitors */
2261 it87_write_value(data, IT87_REG_VIN_ENABLE, 0xff);
2264 /* Check if tachometers are reset manually or by some reason */
2265 mask = 0x70 & ~(sio_data->skip_fan << 4);
2266 data->fan_main_ctrl = it87_read_value(data, IT87_REG_FAN_MAIN_CTRL);
2267 if ((data->fan_main_ctrl & mask) == 0) {
2268 /* Enable all fan tachometers */
2269 data->fan_main_ctrl |= mask;
2270 it87_write_value(data, IT87_REG_FAN_MAIN_CTRL,
2271 data->fan_main_ctrl);
2273 data->has_fan = (data->fan_main_ctrl >> 4) & 0x07;
2275 /* Set tachometers to 16-bit mode if needed */
2276 if (has_16bit_fans(data)) {
2277 tmp = it87_read_value(data, IT87_REG_FAN_16BIT);
2278 if (~tmp & 0x07 & data->has_fan) {
2280 "Setting fan1-3 to 16-bit mode\n");
2281 it87_write_value(data, IT87_REG_FAN_16BIT,
2284 /* IT8705F, IT8782F, and IT8783E/F only support three fans. */
2285 if (data->type != it87 && data->type != it8782 &&
2286 data->type != it8783) {
2288 data->has_fan |= (1 << 3); /* fan4 enabled */
2290 data->has_fan |= (1 << 4); /* fan5 enabled */
2294 /* Fan input pins may be used for alternative functions */
2295 data->has_fan &= ~sio_data->skip_fan;
2297 /* Start monitoring */
2298 it87_write_value(data, IT87_REG_CONFIG,
2299 (it87_read_value(data, IT87_REG_CONFIG) & 0x3e)
2300 | (update_vbat ? 0x41 : 0x01));
2303 static void it87_update_pwm_ctrl(struct it87_data *data, int nr)
2305 data->pwm_ctrl[nr] = it87_read_value(data, IT87_REG_PWM(nr));
2306 if (has_newer_autopwm(data)) {
2307 data->pwm_temp_map[nr] = data->pwm_ctrl[nr] & 0x03;
2308 data->pwm_duty[nr] = it87_read_value(data,
2309 IT87_REG_PWM_DUTY(nr));
2311 if (data->pwm_ctrl[nr] & 0x80) /* Automatic mode */
2312 data->pwm_temp_map[nr] = data->pwm_ctrl[nr] & 0x03;
2313 else /* Manual mode */
2314 data->pwm_duty[nr] = data->pwm_ctrl[nr] & 0x7f;
2317 if (has_old_autopwm(data)) {
2320 for (i = 0; i < 5 ; i++)
2321 data->auto_temp[nr][i] = it87_read_value(data,
2322 IT87_REG_AUTO_TEMP(nr, i));
2323 for (i = 0; i < 3 ; i++)
2324 data->auto_pwm[nr][i] = it87_read_value(data,
2325 IT87_REG_AUTO_PWM(nr, i));
2329 static struct it87_data *it87_update_device(struct device *dev)
2331 struct it87_data *data = dev_get_drvdata(dev);
2334 mutex_lock(&data->update_lock);
2336 if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
2340 * Cleared after each update, so reenable. Value
2341 * returned by this read will be previous value
2343 it87_write_value(data, IT87_REG_CONFIG,
2344 it87_read_value(data, IT87_REG_CONFIG) | 0x40);
2346 for (i = 0; i <= 7; i++) {
2348 it87_read_value(data, IT87_REG_VIN(i));
2350 it87_read_value(data, IT87_REG_VIN_MIN(i));
2352 it87_read_value(data, IT87_REG_VIN_MAX(i));
2354 /* in8 (battery) has no limit registers */
2355 data->in[8][0] = it87_read_value(data, IT87_REG_VIN(8));
2357 for (i = 0; i < 5; i++) {
2358 /* Skip disabled fans */
2359 if (!(data->has_fan & (1 << i)))
2363 it87_read_value(data, IT87_REG_FAN_MIN[i]);
2364 data->fan[i][0] = it87_read_value(data,
2366 /* Add high byte if in 16-bit mode */
2367 if (has_16bit_fans(data)) {
2368 data->fan[i][0] |= it87_read_value(data,
2369 IT87_REG_FANX[i]) << 8;
2370 data->fan[i][1] |= it87_read_value(data,
2371 IT87_REG_FANX_MIN[i]) << 8;
2374 for (i = 0; i < 3; i++) {
2375 if (!(data->has_temp & (1 << i)))
2378 it87_read_value(data, IT87_REG_TEMP(i));
2380 it87_read_value(data, IT87_REG_TEMP_LOW(i));
2382 it87_read_value(data, IT87_REG_TEMP_HIGH(i));
2383 if (has_temp_offset(data))
2385 it87_read_value(data,
2386 IT87_REG_TEMP_OFFSET[i]);
2389 /* Newer chips don't have clock dividers */
2390 if ((data->has_fan & 0x07) && !has_16bit_fans(data)) {
2391 i = it87_read_value(data, IT87_REG_FAN_DIV);
2392 data->fan_div[0] = i & 0x07;
2393 data->fan_div[1] = (i >> 3) & 0x07;
2394 data->fan_div[2] = (i & 0x40) ? 3 : 1;
2398 it87_read_value(data, IT87_REG_ALARM1) |
2399 (it87_read_value(data, IT87_REG_ALARM2) << 8) |
2400 (it87_read_value(data, IT87_REG_ALARM3) << 16);
2401 data->beeps = it87_read_value(data, IT87_REG_BEEP_ENABLE);
2403 data->fan_main_ctrl = it87_read_value(data,
2404 IT87_REG_FAN_MAIN_CTRL);
2405 data->fan_ctl = it87_read_value(data, IT87_REG_FAN_CTL);
2406 for (i = 0; i < 3; i++)
2407 it87_update_pwm_ctrl(data, i);
2409 data->sensor = it87_read_value(data, IT87_REG_TEMP_ENABLE);
2411 * The IT8705F does not have VID capability.
2412 * The IT8718F and later don't use IT87_REG_VID for the
2415 if (data->type == it8712 || data->type == it8716) {
2416 data->vid = it87_read_value(data, IT87_REG_VID);
2418 * The older IT8712F revisions had only 5 VID pins,
2419 * but we assume it is always safe to read 6 bits.
2423 data->last_updated = jiffies;
2427 mutex_unlock(&data->update_lock);
2432 static int __init it87_device_add(unsigned short address,
2433 const struct it87_sio_data *sio_data)
2435 struct resource res = {
2436 .start = address + IT87_EC_OFFSET,
2437 .end = address + IT87_EC_OFFSET + IT87_EC_EXTENT - 1,
2439 .flags = IORESOURCE_IO,
2443 err = acpi_check_resource_conflict(&res);
2447 pdev = platform_device_alloc(DRVNAME, address);
2450 pr_err("Device allocation failed\n");
2454 err = platform_device_add_resources(pdev, &res, 1);
2456 pr_err("Device resource addition failed (%d)\n", err);
2457 goto exit_device_put;
2460 err = platform_device_add_data(pdev, sio_data,
2461 sizeof(struct it87_sio_data));
2463 pr_err("Platform data allocation failed\n");
2464 goto exit_device_put;
2467 err = platform_device_add(pdev);
2469 pr_err("Device addition failed (%d)\n", err);
2470 goto exit_device_put;
2476 platform_device_put(pdev);
2481 static int __init sm_it87_init(void)
2484 unsigned short isa_address = 0;
2485 struct it87_sio_data sio_data;
2487 memset(&sio_data, 0, sizeof(struct it87_sio_data));
2488 err = it87_find(&isa_address, &sio_data);
2491 err = platform_driver_register(&it87_driver);
2495 err = it87_device_add(isa_address, &sio_data);
2497 platform_driver_unregister(&it87_driver);
2504 static void __exit sm_it87_exit(void)
2506 platform_device_unregister(pdev);
2507 platform_driver_unregister(&it87_driver);
2511 MODULE_AUTHOR("Chris Gauthron, "
2512 "Jean Delvare <khali@linux-fr.org>");
2513 MODULE_DESCRIPTION("IT8705F/IT871xF/IT872xF hardware monitoring driver");
2514 module_param(update_vbat, bool, 0);
2515 MODULE_PARM_DESC(update_vbat, "Update vbat if set else return powerup value");
2516 module_param(fix_pwm_polarity, bool, 0);
2517 MODULE_PARM_DESC(fix_pwm_polarity,
2518 "Force PWM polarity to active high (DANGEROUS)");
2519 MODULE_LICENSE("GPL");
2521 module_init(sm_it87_init);
2522 module_exit(sm_it87_exit);