| /* |
| it87.c - Part of lm_sensors, Linux kernel modules for hardware |
| monitoring. |
| |
| The IT8705F is an LPC-based Super I/O part that contains UARTs, a |
| parallel port, an IR port, a MIDI port, a floppy controller, etc., in |
| addition to an Environment Controller (Enhanced Hardware Monitor and |
| Fan Controller) |
| |
| This driver supports only the Environment Controller in the IT8705F and |
| similar parts. The other devices are supported by different drivers. |
| |
| Supports: IT8705F Super I/O chip w/LPC interface |
| IT8712F Super I/O chip w/LPC interface |
| IT8716F Super I/O chip w/LPC interface |
| IT8718F Super I/O chip w/LPC interface |
| IT8726F Super I/O chip w/LPC interface |
| Sis950 A clone of the IT8705F |
| |
| Copyright (C) 2001 Chris Gauthron |
| Copyright (C) 2005-2006 Jean Delvare <khali@linux-fr.org> |
| |
| This program is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 2 of the License, or |
| (at your option) any later version. |
| |
| This program is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| GNU General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with this program; if not, write to the Free Software |
| Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
| */ |
| |
| #include <linux/module.h> |
| #include <linux/init.h> |
| #include <linux/slab.h> |
| #include <linux/jiffies.h> |
| #include <linux/platform_device.h> |
| #include <linux/hwmon.h> |
| #include <linux/hwmon-sysfs.h> |
| #include <linux/hwmon-vid.h> |
| #include <linux/err.h> |
| #include <linux/mutex.h> |
| #include <linux/sysfs.h> |
| #include <asm/io.h> |
| |
| #define DRVNAME "it87" |
| |
| enum chips { it87, it8712, it8716, it8718 }; |
| |
| static unsigned short force_id; |
| module_param(force_id, ushort, 0); |
| MODULE_PARM_DESC(force_id, "Override the detected device ID"); |
| |
| static struct platform_device *pdev; |
| |
| #define REG 0x2e /* The register to read/write */ |
| #define DEV 0x07 /* Register: Logical device select */ |
| #define VAL 0x2f /* The value to read/write */ |
| #define PME 0x04 /* The device with the fan registers in it */ |
| #define GPIO 0x07 /* The device with the IT8718F VID value in it */ |
| #define DEVID 0x20 /* Register: Device ID */ |
| #define DEVREV 0x22 /* Register: Device Revision */ |
| |
| static inline int |
| superio_inb(int reg) |
| { |
| outb(reg, REG); |
| return inb(VAL); |
| } |
| |
| static int superio_inw(int reg) |
| { |
| int val; |
| outb(reg++, REG); |
| val = inb(VAL) << 8; |
| outb(reg, REG); |
| val |= inb(VAL); |
| return val; |
| } |
| |
| static inline void |
| superio_select(int ldn) |
| { |
| outb(DEV, REG); |
| outb(ldn, VAL); |
| } |
| |
| static inline void |
| superio_enter(void) |
| { |
| outb(0x87, REG); |
| outb(0x01, REG); |
| outb(0x55, REG); |
| outb(0x55, REG); |
| } |
| |
| static inline void |
| superio_exit(void) |
| { |
| outb(0x02, REG); |
| outb(0x02, VAL); |
| } |
| |
| /* Logical device 4 registers */ |
| #define IT8712F_DEVID 0x8712 |
| #define IT8705F_DEVID 0x8705 |
| #define IT8716F_DEVID 0x8716 |
| #define IT8718F_DEVID 0x8718 |
| #define IT8726F_DEVID 0x8726 |
| #define IT87_ACT_REG 0x30 |
| #define IT87_BASE_REG 0x60 |
| |
| /* Logical device 7 registers (IT8712F and later) */ |
| #define IT87_SIO_PINX2_REG 0x2c /* Pin selection */ |
| #define IT87_SIO_VID_REG 0xfc /* VID value */ |
| |
| /* Update battery voltage after every reading if true */ |
| static int update_vbat; |
| |
| /* Not all BIOSes properly configure the PWM registers */ |
| static int fix_pwm_polarity; |
| |
| /* Many IT87 constants specified below */ |
| |
| /* Length of ISA address segment */ |
| #define IT87_EXTENT 8 |
| |
| /* Length of ISA address segment for Environmental Controller */ |
| #define IT87_EC_EXTENT 2 |
| |
| /* Offset of EC registers from ISA base address */ |
| #define IT87_EC_OFFSET 5 |
| |
| /* Where are the ISA address/data registers relative to the EC base address */ |
| #define IT87_ADDR_REG_OFFSET 0 |
| #define IT87_DATA_REG_OFFSET 1 |
| |
| /*----- The IT87 registers -----*/ |
| |
| #define IT87_REG_CONFIG 0x00 |
| |
| #define IT87_REG_ALARM1 0x01 |
| #define IT87_REG_ALARM2 0x02 |
| #define IT87_REG_ALARM3 0x03 |
| |
| /* The IT8718F has the VID value in a different register, in Super-I/O |
| configuration space. */ |
| #define IT87_REG_VID 0x0a |
| /* Warning: register 0x0b is used for something completely different in |
| new chips/revisions. I suspect only 16-bit tachometer mode will work |
| for these. */ |
| #define IT87_REG_FAN_DIV 0x0b |
| #define IT87_REG_FAN_16BIT 0x0c |
| |
| /* Monitors: 9 voltage (0 to 7, battery), 3 temp (1 to 3), 3 fan (1 to 3) */ |
| |
| static const u8 IT87_REG_FAN[] = { 0x0d, 0x0e, 0x0f, 0x80, 0x82 }; |
| static const u8 IT87_REG_FAN_MIN[] = { 0x10, 0x11, 0x12, 0x84, 0x86 }; |
| static const u8 IT87_REG_FANX[] = { 0x18, 0x19, 0x1a, 0x81, 0x83 }; |
| static const u8 IT87_REG_FANX_MIN[] = { 0x1b, 0x1c, 0x1d, 0x85, 0x87 }; |
| #define IT87_REG_FAN_MAIN_CTRL 0x13 |
| #define IT87_REG_FAN_CTL 0x14 |
| #define IT87_REG_PWM(nr) (0x15 + (nr)) |
| |
| #define IT87_REG_VIN(nr) (0x20 + (nr)) |
| #define IT87_REG_TEMP(nr) (0x29 + (nr)) |
| |
| #define IT87_REG_VIN_MAX(nr) (0x30 + (nr) * 2) |
| #define IT87_REG_VIN_MIN(nr) (0x31 + (nr) * 2) |
| #define IT87_REG_TEMP_HIGH(nr) (0x40 + (nr) * 2) |
| #define IT87_REG_TEMP_LOW(nr) (0x41 + (nr) * 2) |
| |
| #define IT87_REG_VIN_ENABLE 0x50 |
| #define IT87_REG_TEMP_ENABLE 0x51 |
| |
| #define IT87_REG_CHIPID 0x58 |
| |
| #define IN_TO_REG(val) (SENSORS_LIMIT((((val) + 8)/16),0,255)) |
| #define IN_FROM_REG(val) ((val) * 16) |
| |
| static inline u8 FAN_TO_REG(long rpm, int div) |
| { |
| if (rpm == 0) |
| return 255; |
| rpm = SENSORS_LIMIT(rpm, 1, 1000000); |
| return SENSORS_LIMIT((1350000 + rpm * div / 2) / (rpm * div), 1, |
| 254); |
| } |
| |
| static inline u16 FAN16_TO_REG(long rpm) |
| { |
| if (rpm == 0) |
| return 0xffff; |
| return SENSORS_LIMIT((1350000 + rpm) / (rpm * 2), 1, 0xfffe); |
| } |
| |
| #define FAN_FROM_REG(val,div) ((val)==0?-1:(val)==255?0:1350000/((val)*(div))) |
| /* The divider is fixed to 2 in 16-bit mode */ |
| #define FAN16_FROM_REG(val) ((val)==0?-1:(val)==0xffff?0:1350000/((val)*2)) |
| |
| #define TEMP_TO_REG(val) (SENSORS_LIMIT(((val)<0?(((val)-500)/1000):\ |
| ((val)+500)/1000),-128,127)) |
| #define TEMP_FROM_REG(val) (((val)>0x80?(val)-0x100:(val))*1000) |
| |
| #define PWM_TO_REG(val) ((val) >> 1) |
| #define PWM_FROM_REG(val) (((val)&0x7f) << 1) |
| |
| static int DIV_TO_REG(int val) |
| { |
| int answer = 0; |
| while (answer < 7 && (val >>= 1)) |
| answer++; |
| return answer; |
| } |
| #define DIV_FROM_REG(val) (1 << (val)) |
| |
| static const unsigned int pwm_freq[8] = { |
| 48000000 / 128, |
| 24000000 / 128, |
| 12000000 / 128, |
| 8000000 / 128, |
| 6000000 / 128, |
| 3000000 / 128, |
| 1500000 / 128, |
| 750000 / 128, |
| }; |
| |
| |
| struct it87_sio_data { |
| enum chips type; |
| /* Values read from Super-I/O config space */ |
| u8 vid_value; |
| }; |
| |
| /* For each registered chip, we need to keep some data in memory. |
| The structure is dynamically allocated. */ |
| struct it87_data { |
| struct device *hwmon_dev; |
| enum chips type; |
| |
| unsigned short addr; |
| const char *name; |
| struct mutex update_lock; |
| char valid; /* !=0 if following fields are valid */ |
| unsigned long last_updated; /* In jiffies */ |
| |
| u8 in[9]; /* Register value */ |
| u8 in_max[8]; /* Register value */ |
| u8 in_min[8]; /* Register value */ |
| u8 has_fan; /* Bitfield, fans enabled */ |
| u16 fan[5]; /* Register values, possibly combined */ |
| u16 fan_min[5]; /* Register values, possibly combined */ |
| u8 temp[3]; /* Register value */ |
| u8 temp_high[3]; /* Register value */ |
| u8 temp_low[3]; /* Register value */ |
| u8 sensor; /* Register value */ |
| u8 fan_div[3]; /* Register encoding, shifted right */ |
| u8 vid; /* Register encoding, combined */ |
| u8 vrm; |
| u32 alarms; /* Register encoding, combined */ |
| u8 fan_main_ctrl; /* Register value */ |
| u8 fan_ctl; /* Register value */ |
| u8 manual_pwm_ctl[3]; /* manual PWM value set by user */ |
| }; |
| |
| |
| static int it87_probe(struct platform_device *pdev); |
| static int __devexit it87_remove(struct platform_device *pdev); |
| |
| static int it87_read_value(struct it87_data *data, u8 reg); |
| static void it87_write_value(struct it87_data *data, u8 reg, u8 value); |
| static struct it87_data *it87_update_device(struct device *dev); |
| static int it87_check_pwm(struct device *dev); |
| static void it87_init_device(struct platform_device *pdev); |
| |
| |
| static struct platform_driver it87_driver = { |
| .driver = { |
| .owner = THIS_MODULE, |
| .name = DRVNAME, |
| }, |
| .probe = it87_probe, |
| .remove = __devexit_p(it87_remove), |
| }; |
| |
| static ssize_t show_in(struct device *dev, struct device_attribute *attr, |
| char *buf) |
| { |
| struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); |
| int nr = sensor_attr->index; |
| |
| struct it87_data *data = it87_update_device(dev); |
| return sprintf(buf, "%d\n", IN_FROM_REG(data->in[nr])); |
| } |
| |
| static ssize_t show_in_min(struct device *dev, struct device_attribute *attr, |
| char *buf) |
| { |
| struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); |
| int nr = sensor_attr->index; |
| |
| struct it87_data *data = it87_update_device(dev); |
| return sprintf(buf, "%d\n", IN_FROM_REG(data->in_min[nr])); |
| } |
| |
| static ssize_t show_in_max(struct device *dev, struct device_attribute *attr, |
| char *buf) |
| { |
| struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); |
| int nr = sensor_attr->index; |
| |
| struct it87_data *data = it87_update_device(dev); |
| return sprintf(buf, "%d\n", IN_FROM_REG(data->in_max[nr])); |
| } |
| |
| static ssize_t set_in_min(struct device *dev, struct device_attribute *attr, |
| const char *buf, size_t count) |
| { |
| struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); |
| int nr = sensor_attr->index; |
| |
| struct it87_data *data = dev_get_drvdata(dev); |
| unsigned long val = simple_strtoul(buf, NULL, 10); |
| |
| mutex_lock(&data->update_lock); |
| data->in_min[nr] = IN_TO_REG(val); |
| it87_write_value(data, IT87_REG_VIN_MIN(nr), |
| data->in_min[nr]); |
| mutex_unlock(&data->update_lock); |
| return count; |
| } |
| static ssize_t set_in_max(struct device *dev, struct device_attribute *attr, |
| const char *buf, size_t count) |
| { |
| struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); |
| int nr = sensor_attr->index; |
| |
| struct it87_data *data = dev_get_drvdata(dev); |
| unsigned long val = simple_strtoul(buf, NULL, 10); |
| |
| mutex_lock(&data->update_lock); |
| data->in_max[nr] = IN_TO_REG(val); |
| it87_write_value(data, IT87_REG_VIN_MAX(nr), |
| data->in_max[nr]); |
| mutex_unlock(&data->update_lock); |
| return count; |
| } |
| |
| #define show_in_offset(offset) \ |
| static SENSOR_DEVICE_ATTR(in##offset##_input, S_IRUGO, \ |
| show_in, NULL, offset); |
| |
| #define limit_in_offset(offset) \ |
| static SENSOR_DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \ |
| show_in_min, set_in_min, offset); \ |
| static SENSOR_DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \ |
| show_in_max, set_in_max, offset); |
| |
| show_in_offset(0); |
| limit_in_offset(0); |
| show_in_offset(1); |
| limit_in_offset(1); |
| show_in_offset(2); |
| limit_in_offset(2); |
| show_in_offset(3); |
| limit_in_offset(3); |
| show_in_offset(4); |
| limit_in_offset(4); |
| show_in_offset(5); |
| limit_in_offset(5); |
| show_in_offset(6); |
| limit_in_offset(6); |
| show_in_offset(7); |
| limit_in_offset(7); |
| show_in_offset(8); |
| |
| /* 3 temperatures */ |
| static ssize_t show_temp(struct device *dev, struct device_attribute *attr, |
| char *buf) |
| { |
| struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); |
| int nr = sensor_attr->index; |
| |
| struct it87_data *data = it87_update_device(dev); |
| return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[nr])); |
| } |
| static ssize_t show_temp_max(struct device *dev, struct device_attribute *attr, |
| char *buf) |
| { |
| struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); |
| int nr = sensor_attr->index; |
| |
| struct it87_data *data = it87_update_device(dev); |
| return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_high[nr])); |
| } |
| static ssize_t show_temp_min(struct device *dev, struct device_attribute *attr, |
| char *buf) |
| { |
| struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); |
| int nr = sensor_attr->index; |
| |
| struct it87_data *data = it87_update_device(dev); |
| return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_low[nr])); |
| } |
| static ssize_t set_temp_max(struct device *dev, struct device_attribute *attr, |
| const char *buf, size_t count) |
| { |
| struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); |
| int nr = sensor_attr->index; |
| |
| struct it87_data *data = dev_get_drvdata(dev); |
| int val = simple_strtol(buf, NULL, 10); |
| |
| mutex_lock(&data->update_lock); |
| data->temp_high[nr] = TEMP_TO_REG(val); |
| it87_write_value(data, IT87_REG_TEMP_HIGH(nr), data->temp_high[nr]); |
| mutex_unlock(&data->update_lock); |
| return count; |
| } |
| static ssize_t set_temp_min(struct device *dev, struct device_attribute *attr, |
| const char *buf, size_t count) |
| { |
| struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); |
| int nr = sensor_attr->index; |
| |
| struct it87_data *data = dev_get_drvdata(dev); |
| int val = simple_strtol(buf, NULL, 10); |
| |
| mutex_lock(&data->update_lock); |
| data->temp_low[nr] = TEMP_TO_REG(val); |
| it87_write_value(data, IT87_REG_TEMP_LOW(nr), data->temp_low[nr]); |
| mutex_unlock(&data->update_lock); |
| return count; |
| } |
| #define show_temp_offset(offset) \ |
| static SENSOR_DEVICE_ATTR(temp##offset##_input, S_IRUGO, \ |
| show_temp, NULL, offset - 1); \ |
| static SENSOR_DEVICE_ATTR(temp##offset##_max, S_IRUGO | S_IWUSR, \ |
| show_temp_max, set_temp_max, offset - 1); \ |
| static SENSOR_DEVICE_ATTR(temp##offset##_min, S_IRUGO | S_IWUSR, \ |
| show_temp_min, set_temp_min, offset - 1); |
| |
| show_temp_offset(1); |
| show_temp_offset(2); |
| show_temp_offset(3); |
| |
| static ssize_t show_sensor(struct device *dev, struct device_attribute *attr, |
| char *buf) |
| { |
| struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); |
| int nr = sensor_attr->index; |
| |
| struct it87_data *data = it87_update_device(dev); |
| u8 reg = data->sensor; /* In case the value is updated while we use it */ |
| |
| if (reg & (1 << nr)) |
| return sprintf(buf, "3\n"); /* thermal diode */ |
| if (reg & (8 << nr)) |
| return sprintf(buf, "2\n"); /* thermistor */ |
| return sprintf(buf, "0\n"); /* disabled */ |
| } |
| static ssize_t set_sensor(struct device *dev, struct device_attribute *attr, |
| const char *buf, size_t count) |
| { |
| struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); |
| int nr = sensor_attr->index; |
| |
| struct it87_data *data = dev_get_drvdata(dev); |
| int val = simple_strtol(buf, NULL, 10); |
| |
| mutex_lock(&data->update_lock); |
| |
| data->sensor &= ~(1 << nr); |
| data->sensor &= ~(8 << nr); |
| /* 3 = thermal diode; 2 = thermistor; 0 = disabled */ |
| if (val == 3) |
| data->sensor |= 1 << nr; |
| else if (val == 2) |
| data->sensor |= 8 << nr; |
| else if (val != 0) { |
| mutex_unlock(&data->update_lock); |
| return -EINVAL; |
| } |
| it87_write_value(data, IT87_REG_TEMP_ENABLE, data->sensor); |
| mutex_unlock(&data->update_lock); |
| return count; |
| } |
| #define show_sensor_offset(offset) \ |
| static SENSOR_DEVICE_ATTR(temp##offset##_type, S_IRUGO | S_IWUSR, \ |
| show_sensor, set_sensor, offset - 1); |
| |
| show_sensor_offset(1); |
| show_sensor_offset(2); |
| show_sensor_offset(3); |
| |
| /* 3 Fans */ |
| static ssize_t show_fan(struct device *dev, struct device_attribute *attr, |
| char *buf) |
| { |
| struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); |
| int nr = sensor_attr->index; |
| |
| struct it87_data *data = it87_update_device(dev); |
| return sprintf(buf,"%d\n", FAN_FROM_REG(data->fan[nr], |
| DIV_FROM_REG(data->fan_div[nr]))); |
| } |
| static ssize_t show_fan_min(struct device *dev, struct device_attribute *attr, |
| char *buf) |
| { |
| struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); |
| int nr = sensor_attr->index; |
| |
| struct it87_data *data = it87_update_device(dev); |
| return sprintf(buf,"%d\n", |
| FAN_FROM_REG(data->fan_min[nr], DIV_FROM_REG(data->fan_div[nr]))); |
| } |
| static ssize_t show_fan_div(struct device *dev, struct device_attribute *attr, |
| char *buf) |
| { |
| struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); |
| int nr = sensor_attr->index; |
| |
| struct it87_data *data = it87_update_device(dev); |
| return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr])); |
| } |
| static ssize_t show_pwm_enable(struct device *dev, struct device_attribute *attr, |
| char *buf) |
| { |
| struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); |
| int nr = sensor_attr->index; |
| |
| struct it87_data *data = it87_update_device(dev); |
| return sprintf(buf,"%d\n", (data->fan_main_ctrl & (1 << nr)) ? 1 : 0); |
| } |
| static ssize_t show_pwm(struct device *dev, struct device_attribute *attr, |
| char *buf) |
| { |
| struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); |
| int nr = sensor_attr->index; |
| |
| struct it87_data *data = it87_update_device(dev); |
| return sprintf(buf,"%d\n", data->manual_pwm_ctl[nr]); |
| } |
| static ssize_t show_pwm_freq(struct device *dev, struct device_attribute *attr, |
| char *buf) |
| { |
| struct it87_data *data = it87_update_device(dev); |
| int index = (data->fan_ctl >> 4) & 0x07; |
| |
| return sprintf(buf, "%u\n", pwm_freq[index]); |
| } |
| static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr, |
| const char *buf, size_t count) |
| { |
| struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); |
| int nr = sensor_attr->index; |
| |
| struct it87_data *data = dev_get_drvdata(dev); |
| int val = simple_strtol(buf, NULL, 10); |
| u8 reg; |
| |
| mutex_lock(&data->update_lock); |
| reg = it87_read_value(data, IT87_REG_FAN_DIV); |
| switch (nr) { |
| case 0: data->fan_div[nr] = reg & 0x07; break; |
| case 1: data->fan_div[nr] = (reg >> 3) & 0x07; break; |
| case 2: data->fan_div[nr] = (reg & 0x40) ? 3 : 1; break; |
| } |
| |
| data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr])); |
| it87_write_value(data, IT87_REG_FAN_MIN[nr], data->fan_min[nr]); |
| mutex_unlock(&data->update_lock); |
| return count; |
| } |
| static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr, |
| const char *buf, size_t count) |
| { |
| struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); |
| int nr = sensor_attr->index; |
| |
| struct it87_data *data = dev_get_drvdata(dev); |
| unsigned long val = simple_strtoul(buf, NULL, 10); |
| int min; |
| u8 old; |
| |
| mutex_lock(&data->update_lock); |
| old = it87_read_value(data, IT87_REG_FAN_DIV); |
| |
| /* Save fan min limit */ |
| min = FAN_FROM_REG(data->fan_min[nr], DIV_FROM_REG(data->fan_div[nr])); |
| |
| switch (nr) { |
| case 0: |
| case 1: |
| data->fan_div[nr] = DIV_TO_REG(val); |
| break; |
| case 2: |
| if (val < 8) |
| data->fan_div[nr] = 1; |
| else |
| data->fan_div[nr] = 3; |
| } |
| val = old & 0x80; |
| val |= (data->fan_div[0] & 0x07); |
| val |= (data->fan_div[1] & 0x07) << 3; |
| if (data->fan_div[2] == 3) |
| val |= 0x1 << 6; |
| it87_write_value(data, IT87_REG_FAN_DIV, val); |
| |
| /* Restore fan min limit */ |
| data->fan_min[nr] = FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr])); |
| it87_write_value(data, IT87_REG_FAN_MIN[nr], data->fan_min[nr]); |
| |
| mutex_unlock(&data->update_lock); |
| return count; |
| } |
| static ssize_t set_pwm_enable(struct device *dev, |
| struct device_attribute *attr, const char *buf, size_t count) |
| { |
| struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); |
| int nr = sensor_attr->index; |
| |
| struct it87_data *data = dev_get_drvdata(dev); |
| int val = simple_strtol(buf, NULL, 10); |
| |
| mutex_lock(&data->update_lock); |
| |
| if (val == 0) { |
| int tmp; |
| /* make sure the fan is on when in on/off mode */ |
| tmp = it87_read_value(data, IT87_REG_FAN_CTL); |
| it87_write_value(data, IT87_REG_FAN_CTL, tmp | (1 << nr)); |
| /* set on/off mode */ |
| data->fan_main_ctrl &= ~(1 << nr); |
| it87_write_value(data, IT87_REG_FAN_MAIN_CTRL, data->fan_main_ctrl); |
| } else if (val == 1) { |
| /* set SmartGuardian mode */ |
| data->fan_main_ctrl |= (1 << nr); |
| it87_write_value(data, IT87_REG_FAN_MAIN_CTRL, data->fan_main_ctrl); |
| /* set saved pwm value, clear FAN_CTLX PWM mode bit */ |
| it87_write_value(data, IT87_REG_PWM(nr), PWM_TO_REG(data->manual_pwm_ctl[nr])); |
| } else { |
| mutex_unlock(&data->update_lock); |
| return -EINVAL; |
| } |
| |
| mutex_unlock(&data->update_lock); |
| return count; |
| } |
| static ssize_t set_pwm(struct device *dev, struct device_attribute *attr, |
| const char *buf, size_t count) |
| { |
| struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); |
| int nr = sensor_attr->index; |
| |
| struct it87_data *data = dev_get_drvdata(dev); |
| int val = simple_strtol(buf, NULL, 10); |
| |
| if (val < 0 || val > 255) |
| return -EINVAL; |
| |
| mutex_lock(&data->update_lock); |
| data->manual_pwm_ctl[nr] = val; |
| if (data->fan_main_ctrl & (1 << nr)) |
| it87_write_value(data, IT87_REG_PWM(nr), PWM_TO_REG(data->manual_pwm_ctl[nr])); |
| mutex_unlock(&data->update_lock); |
| return count; |
| } |
| static ssize_t set_pwm_freq(struct device *dev, |
| struct device_attribute *attr, const char *buf, size_t count) |
| { |
| struct it87_data *data = dev_get_drvdata(dev); |
| unsigned long val = simple_strtoul(buf, NULL, 10); |
| int i; |
| |
| /* Search for the nearest available frequency */ |
| for (i = 0; i < 7; i++) { |
| if (val > (pwm_freq[i] + pwm_freq[i+1]) / 2) |
| break; |
| } |
| |
| mutex_lock(&data->update_lock); |
| data->fan_ctl = it87_read_value(data, IT87_REG_FAN_CTL) & 0x8f; |
| data->fan_ctl |= i << 4; |
| it87_write_value(data, IT87_REG_FAN_CTL, data->fan_ctl); |
| mutex_unlock(&data->update_lock); |
| |
| return count; |
| } |
| |
| #define show_fan_offset(offset) \ |
| static SENSOR_DEVICE_ATTR(fan##offset##_input, S_IRUGO, \ |
| show_fan, NULL, offset - 1); \ |
| static SENSOR_DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \ |
| show_fan_min, set_fan_min, offset - 1); \ |
| static SENSOR_DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR, \ |
| show_fan_div, set_fan_div, offset - 1); |
| |
| show_fan_offset(1); |
| show_fan_offset(2); |
| show_fan_offset(3); |
| |
| #define show_pwm_offset(offset) \ |
| static SENSOR_DEVICE_ATTR(pwm##offset##_enable, S_IRUGO | S_IWUSR, \ |
| show_pwm_enable, set_pwm_enable, offset - 1); \ |
| static SENSOR_DEVICE_ATTR(pwm##offset, S_IRUGO | S_IWUSR, \ |
| show_pwm, set_pwm, offset - 1); \ |
| static DEVICE_ATTR(pwm##offset##_freq, \ |
| (offset == 1 ? S_IRUGO | S_IWUSR : S_IRUGO), \ |
| show_pwm_freq, (offset == 1 ? set_pwm_freq : NULL)); |
| |
| show_pwm_offset(1); |
| show_pwm_offset(2); |
| show_pwm_offset(3); |
| |
| /* A different set of callbacks for 16-bit fans */ |
| static ssize_t show_fan16(struct device *dev, struct device_attribute *attr, |
| char *buf) |
| { |
| struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); |
| int nr = sensor_attr->index; |
| struct it87_data *data = it87_update_device(dev); |
| return sprintf(buf, "%d\n", FAN16_FROM_REG(data->fan[nr])); |
| } |
| |
| static ssize_t show_fan16_min(struct device *dev, struct device_attribute *attr, |
| char *buf) |
| { |
| struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); |
| int nr = sensor_attr->index; |
| struct it87_data *data = it87_update_device(dev); |
| return sprintf(buf, "%d\n", FAN16_FROM_REG(data->fan_min[nr])); |
| } |
| |
| static ssize_t set_fan16_min(struct device *dev, struct device_attribute *attr, |
| const char *buf, size_t count) |
| { |
| struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); |
| int nr = sensor_attr->index; |
| struct it87_data *data = dev_get_drvdata(dev); |
| int val = simple_strtol(buf, NULL, 10); |
| |
| mutex_lock(&data->update_lock); |
| data->fan_min[nr] = FAN16_TO_REG(val); |
| it87_write_value(data, IT87_REG_FAN_MIN[nr], |
| data->fan_min[nr] & 0xff); |
| it87_write_value(data, IT87_REG_FANX_MIN[nr], |
| data->fan_min[nr] >> 8); |
| mutex_unlock(&data->update_lock); |
| return count; |
| } |
| |
| /* We want to use the same sysfs file names as 8-bit fans, but we need |
| different variable names, so we have to use SENSOR_ATTR instead of |
| SENSOR_DEVICE_ATTR. */ |
| #define show_fan16_offset(offset) \ |
| static struct sensor_device_attribute sensor_dev_attr_fan##offset##_input16 \ |
| = SENSOR_ATTR(fan##offset##_input, S_IRUGO, \ |
| show_fan16, NULL, offset - 1); \ |
| static struct sensor_device_attribute sensor_dev_attr_fan##offset##_min16 \ |
| = SENSOR_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \ |
| show_fan16_min, set_fan16_min, offset - 1) |
| |
| show_fan16_offset(1); |
| show_fan16_offset(2); |
| show_fan16_offset(3); |
| show_fan16_offset(4); |
| show_fan16_offset(5); |
| |
| /* Alarms */ |
| static ssize_t show_alarms(struct device *dev, struct device_attribute *attr, char *buf) |
| { |
| struct it87_data *data = it87_update_device(dev); |
| return sprintf(buf, "%u\n", data->alarms); |
| } |
| static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL); |
| |
| static ssize_t |
| show_vrm_reg(struct device *dev, struct device_attribute *attr, char *buf) |
| { |
| struct it87_data *data = dev_get_drvdata(dev); |
| return sprintf(buf, "%u\n", data->vrm); |
| } |
| static ssize_t |
| store_vrm_reg(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) |
| { |
| struct it87_data *data = dev_get_drvdata(dev); |
| u32 val; |
| |
| val = simple_strtoul(buf, NULL, 10); |
| data->vrm = val; |
| |
| return count; |
| } |
| static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm_reg, store_vrm_reg); |
| |
| static ssize_t |
| show_vid_reg(struct device *dev, struct device_attribute *attr, char *buf) |
| { |
| struct it87_data *data = it87_update_device(dev); |
| return sprintf(buf, "%ld\n", (long) vid_from_reg(data->vid, data->vrm)); |
| } |
| static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid_reg, NULL); |
| |
| static ssize_t show_name(struct device *dev, struct device_attribute |
| *devattr, char *buf) |
| { |
| struct it87_data *data = dev_get_drvdata(dev); |
| return sprintf(buf, "%s\n", data->name); |
| } |
| static DEVICE_ATTR(name, S_IRUGO, show_name, NULL); |
| |
| static struct attribute *it87_attributes[] = { |
| &sensor_dev_attr_in0_input.dev_attr.attr, |
| &sensor_dev_attr_in1_input.dev_attr.attr, |
| &sensor_dev_attr_in2_input.dev_attr.attr, |
| &sensor_dev_attr_in3_input.dev_attr.attr, |
| &sensor_dev_attr_in4_input.dev_attr.attr, |
| &sensor_dev_attr_in5_input.dev_attr.attr, |
| &sensor_dev_attr_in6_input.dev_attr.attr, |
| &sensor_dev_attr_in7_input.dev_attr.attr, |
| &sensor_dev_attr_in8_input.dev_attr.attr, |
| &sensor_dev_attr_in0_min.dev_attr.attr, |
| &sensor_dev_attr_in1_min.dev_attr.attr, |
| &sensor_dev_attr_in2_min.dev_attr.attr, |
| &sensor_dev_attr_in3_min.dev_attr.attr, |
| &sensor_dev_attr_in4_min.dev_attr.attr, |
| &sensor_dev_attr_in5_min.dev_attr.attr, |
| &sensor_dev_attr_in6_min.dev_attr.attr, |
| &sensor_dev_attr_in7_min.dev_attr.attr, |
| &sensor_dev_attr_in0_max.dev_attr.attr, |
| &sensor_dev_attr_in1_max.dev_attr.attr, |
| &sensor_dev_attr_in2_max.dev_attr.attr, |
| &sensor_dev_attr_in3_max.dev_attr.attr, |
| &sensor_dev_attr_in4_max.dev_attr.attr, |
| &sensor_dev_attr_in5_max.dev_attr.attr, |
| &sensor_dev_attr_in6_max.dev_attr.attr, |
| &sensor_dev_attr_in7_max.dev_attr.attr, |
| |
| &sensor_dev_attr_temp1_input.dev_attr.attr, |
| &sensor_dev_attr_temp2_input.dev_attr.attr, |
| &sensor_dev_attr_temp3_input.dev_attr.attr, |
| &sensor_dev_attr_temp1_max.dev_attr.attr, |
| &sensor_dev_attr_temp2_max.dev_attr.attr, |
| &sensor_dev_attr_temp3_max.dev_attr.attr, |
| &sensor_dev_attr_temp1_min.dev_attr.attr, |
| &sensor_dev_attr_temp2_min.dev_attr.attr, |
| &sensor_dev_attr_temp3_min.dev_attr.attr, |
| &sensor_dev_attr_temp1_type.dev_attr.attr, |
| &sensor_dev_attr_temp2_type.dev_attr.attr, |
| &sensor_dev_attr_temp3_type.dev_attr.attr, |
| |
| &dev_attr_alarms.attr, |
| &dev_attr_name.attr, |
| NULL |
| }; |
| |
| static const struct attribute_group it87_group = { |
| .attrs = it87_attributes, |
| }; |
| |
| static struct attribute *it87_attributes_opt[] = { |
| &sensor_dev_attr_fan1_input16.dev_attr.attr, |
| &sensor_dev_attr_fan1_min16.dev_attr.attr, |
| &sensor_dev_attr_fan2_input16.dev_attr.attr, |
| &sensor_dev_attr_fan2_min16.dev_attr.attr, |
| &sensor_dev_attr_fan3_input16.dev_attr.attr, |
| &sensor_dev_attr_fan3_min16.dev_attr.attr, |
| &sensor_dev_attr_fan4_input16.dev_attr.attr, |
| &sensor_dev_attr_fan4_min16.dev_attr.attr, |
| &sensor_dev_attr_fan5_input16.dev_attr.attr, |
| &sensor_dev_attr_fan5_min16.dev_attr.attr, |
| |
| &sensor_dev_attr_fan1_input.dev_attr.attr, |
| &sensor_dev_attr_fan1_min.dev_attr.attr, |
| &sensor_dev_attr_fan1_div.dev_attr.attr, |
| &sensor_dev_attr_fan2_input.dev_attr.attr, |
| &sensor_dev_attr_fan2_min.dev_attr.attr, |
| &sensor_dev_attr_fan2_div.dev_attr.attr, |
| &sensor_dev_attr_fan3_input.dev_attr.attr, |
| &sensor_dev_attr_fan3_min.dev_attr.attr, |
| &sensor_dev_attr_fan3_div.dev_attr.attr, |
| |
| &sensor_dev_attr_pwm1_enable.dev_attr.attr, |
| &sensor_dev_attr_pwm2_enable.dev_attr.attr, |
| &sensor_dev_attr_pwm3_enable.dev_attr.attr, |
| &sensor_dev_attr_pwm1.dev_attr.attr, |
| &sensor_dev_attr_pwm2.dev_attr.attr, |
| &sensor_dev_attr_pwm3.dev_attr.attr, |
| |
| &dev_attr_vrm.attr, |
| &dev_attr_cpu0_vid.attr, |
| NULL |
| }; |
| |
| static const struct attribute_group it87_group_opt = { |
| .attrs = it87_attributes_opt, |
| }; |
| |
| /* SuperIO detection - will change isa_address if a chip is found */ |
| static int __init it87_find(unsigned short *address, |
| struct it87_sio_data *sio_data) |
| { |
| int err = -ENODEV; |
| u16 chip_type; |
| |
| superio_enter(); |
| chip_type = force_id ? force_id : superio_inw(DEVID); |
| |
| switch (chip_type) { |
| case IT8705F_DEVID: |
| sio_data->type = it87; |
| break; |
| case IT8712F_DEVID: |
| sio_data->type = it8712; |
| break; |
| case IT8716F_DEVID: |
| case IT8726F_DEVID: |
| sio_data->type = it8716; |
| break; |
| case IT8718F_DEVID: |
| sio_data->type = it8718; |
| break; |
| case 0xffff: /* No device at all */ |
| goto exit; |
| default: |
| pr_debug(DRVNAME ": Unsupported chip (DEVID=0x%x)\n", |
| chip_type); |
| goto exit; |
| } |
| |
| superio_select(PME); |
| if (!(superio_inb(IT87_ACT_REG) & 0x01)) { |
| pr_info("it87: Device not activated, skipping\n"); |
| goto exit; |
| } |
| |
| *address = superio_inw(IT87_BASE_REG) & ~(IT87_EXTENT - 1); |
| if (*address == 0) { |
| pr_info("it87: Base address not set, skipping\n"); |
| goto exit; |
| } |
| |
| err = 0; |
| pr_info("it87: Found IT%04xF chip at 0x%x, revision %d\n", |
| chip_type, *address, superio_inb(DEVREV) & 0x0f); |
| |
| /* Read GPIO config and VID value from LDN 7 (GPIO) */ |
| if (chip_type != IT8705F_DEVID) { |
| int reg; |
| |
| superio_select(GPIO); |
| if (chip_type == it8718) |
| sio_data->vid_value = superio_inb(IT87_SIO_VID_REG); |
| |
| reg = superio_inb(IT87_SIO_PINX2_REG); |
| if (reg & (1 << 0)) |
| pr_info("it87: in3 is VCC (+5V)\n"); |
| if (reg & (1 << 1)) |
| pr_info("it87: in7 is VCCH (+5V Stand-By)\n"); |
| } |
| |
| exit: |
| superio_exit(); |
| return err; |
| } |
| |
| static int __devinit it87_probe(struct platform_device *pdev) |
| { |
| struct it87_data *data; |
| struct resource *res; |
| struct device *dev = &pdev->dev; |
| struct it87_sio_data *sio_data = dev->platform_data; |
| int err = 0; |
| int enable_pwm_interface; |
| static const char *names[] = { |
| "it87", |
| "it8712", |
| "it8716", |
| "it8718", |
| }; |
| |
| res = platform_get_resource(pdev, IORESOURCE_IO, 0); |
| if (!request_region(res->start, IT87_EC_EXTENT, DRVNAME)) { |
| dev_err(dev, "Failed to request region 0x%lx-0x%lx\n", |
| (unsigned long)res->start, |
| (unsigned long)(res->start + IT87_EC_EXTENT - 1)); |
| err = -EBUSY; |
| goto ERROR0; |
| } |
| |
| if (!(data = kzalloc(sizeof(struct it87_data), GFP_KERNEL))) { |
| err = -ENOMEM; |
| goto ERROR1; |
| } |
| |
| data->addr = res->start; |
| data->type = sio_data->type; |
| data->name = names[sio_data->type]; |
| |
| /* Now, we do the remaining detection. */ |
| if ((it87_read_value(data, IT87_REG_CONFIG) & 0x80) |
| || it87_read_value(data, IT87_REG_CHIPID) != 0x90) { |
| err = -ENODEV; |
| goto ERROR2; |
| } |
| |
| platform_set_drvdata(pdev, data); |
| |
| mutex_init(&data->update_lock); |
| |
| /* Check PWM configuration */ |
| enable_pwm_interface = it87_check_pwm(dev); |
| |
| /* Initialize the IT87 chip */ |
| it87_init_device(pdev); |
| |
| /* Register sysfs hooks */ |
| if ((err = sysfs_create_group(&dev->kobj, &it87_group))) |
| goto ERROR2; |
| |
| /* Do not create fan files for disabled fans */ |
| if (data->type == it8716 || data->type == it8718) { |
| /* 16-bit tachometers */ |
| if (data->has_fan & (1 << 0)) { |
| if ((err = device_create_file(dev, |
| &sensor_dev_attr_fan1_input16.dev_attr)) |
| || (err = device_create_file(dev, |
| &sensor_dev_attr_fan1_min16.dev_attr))) |
| goto ERROR4; |
| } |
| if (data->has_fan & (1 << 1)) { |
| if ((err = device_create_file(dev, |
| &sensor_dev_attr_fan2_input16.dev_attr)) |
| || (err = device_create_file(dev, |
| &sensor_dev_attr_fan2_min16.dev_attr))) |
| goto ERROR4; |
| } |
| if (data->has_fan & (1 << 2)) { |
| if ((err = device_create_file(dev, |
| &sensor_dev_attr_fan3_input16.dev_attr)) |
| || (err = device_create_file(dev, |
| &sensor_dev_attr_fan3_min16.dev_attr))) |
| goto ERROR4; |
| } |
| if (data->has_fan & (1 << 3)) { |
| if ((err = device_create_file(dev, |
| &sensor_dev_attr_fan4_input16.dev_attr)) |
| || (err = device_create_file(dev, |
| &sensor_dev_attr_fan4_min16.dev_attr))) |
| goto ERROR4; |
| } |
| if (data->has_fan & (1 << 4)) { |
| if ((err = device_create_file(dev, |
| &sensor_dev_attr_fan5_input16.dev_attr)) |
| || (err = device_create_file(dev, |
| &sensor_dev_attr_fan5_min16.dev_attr))) |
| goto ERROR4; |
| } |
| } else { |
| /* 8-bit tachometers with clock divider */ |
| if (data->has_fan & (1 << 0)) { |
| if ((err = device_create_file(dev, |
| &sensor_dev_attr_fan1_input.dev_attr)) |
| || (err = device_create_file(dev, |
| &sensor_dev_attr_fan1_min.dev_attr)) |
| || (err = device_create_file(dev, |
| &sensor_dev_attr_fan1_div.dev_attr))) |
| goto ERROR4; |
| } |
| if (data->has_fan & (1 << 1)) { |
| if ((err = device_create_file(dev, |
| &sensor_dev_attr_fan2_input.dev_attr)) |
| || (err = device_create_file(dev, |
| &sensor_dev_attr_fan2_min.dev_attr)) |
| || (err = device_create_file(dev, |
| &sensor_dev_attr_fan2_div.dev_attr))) |
| goto ERROR4; |
| } |
| if (data->has_fan & (1 << 2)) { |
| if ((err = device_create_file(dev, |
| &sensor_dev_attr_fan3_input.dev_attr)) |
| || (err = device_create_file(dev, |
| &sensor_dev_attr_fan3_min.dev_attr)) |
| || (err = device_create_file(dev, |
| &sensor_dev_attr_fan3_div.dev_attr))) |
| goto ERROR4; |
| } |
| } |
| |
| if (enable_pwm_interface) { |
| if ((err = device_create_file(dev, |
| &sensor_dev_attr_pwm1_enable.dev_attr)) |
| || (err = device_create_file(dev, |
| &sensor_dev_attr_pwm2_enable.dev_attr)) |
| || (err = device_create_file(dev, |
| &sensor_dev_attr_pwm3_enable.dev_attr)) |
| || (err = device_create_file(dev, |
| &sensor_dev_attr_pwm1.dev_attr)) |
| || (err = device_create_file(dev, |
| &sensor_dev_attr_pwm2.dev_attr)) |
| || (err = device_create_file(dev, |
| &sensor_dev_attr_pwm3.dev_attr)) |
| || (err = device_create_file(dev, |
| &dev_attr_pwm1_freq)) |
| || (err = device_create_file(dev, |
| &dev_attr_pwm2_freq)) |
| || (err = device_create_file(dev, |
| &dev_attr_pwm3_freq))) |
| goto ERROR4; |
| } |
| |
| if (data->type == it8712 || data->type == it8716 |
| || data->type == it8718) { |
| data->vrm = vid_which_vrm(); |
| /* VID reading from Super-I/O config space if available */ |
| data->vid = sio_data->vid_value; |
| if ((err = device_create_file(dev, |
| &dev_attr_vrm)) |
| || (err = device_create_file(dev, |
| &dev_attr_cpu0_vid))) |
| goto ERROR4; |
| } |
| |
| data->hwmon_dev = hwmon_device_register(dev); |
| if (IS_ERR(data->hwmon_dev)) { |
| err = PTR_ERR(data->hwmon_dev); |
| goto ERROR4; |
| } |
| |
| return 0; |
| |
| ERROR4: |
| sysfs_remove_group(&dev->kobj, &it87_group); |
| sysfs_remove_group(&dev->kobj, &it87_group_opt); |
| ERROR2: |
| platform_set_drvdata(pdev, NULL); |
| kfree(data); |
| ERROR1: |
| release_region(res->start, IT87_EC_EXTENT); |
| ERROR0: |
| return err; |
| } |
| |
| static int __devexit it87_remove(struct platform_device *pdev) |
| { |
| struct it87_data *data = platform_get_drvdata(pdev); |
| |
| hwmon_device_unregister(data->hwmon_dev); |
| sysfs_remove_group(&pdev->dev.kobj, &it87_group); |
| sysfs_remove_group(&pdev->dev.kobj, &it87_group_opt); |
| |
| release_region(data->addr, IT87_EC_EXTENT); |
| platform_set_drvdata(pdev, NULL); |
| kfree(data); |
| |
| return 0; |
| } |
| |
| /* Must be called with data->update_lock held, except during initialization. |
| We ignore the IT87 BUSY flag at this moment - it could lead to deadlocks, |
| would slow down the IT87 access and should not be necessary. */ |
| static int it87_read_value(struct it87_data *data, u8 reg) |
| { |
| outb_p(reg, data->addr + IT87_ADDR_REG_OFFSET); |
| return inb_p(data->addr + IT87_DATA_REG_OFFSET); |
| } |
| |
| /* Must be called with data->update_lock held, except during initialization. |
| We ignore the IT87 BUSY flag at this moment - it could lead to deadlocks, |
| would slow down the IT87 access and should not be necessary. */ |
| static void it87_write_value(struct it87_data *data, u8 reg, u8 value) |
| { |
| outb_p(reg, data->addr + IT87_ADDR_REG_OFFSET); |
| outb_p(value, data->addr + IT87_DATA_REG_OFFSET); |
| } |
| |
| /* Return 1 if and only if the PWM interface is safe to use */ |
| static int __devinit it87_check_pwm(struct device *dev) |
| { |
| struct it87_data *data = dev_get_drvdata(dev); |
| /* Some BIOSes fail to correctly configure the IT87 fans. All fans off |
| * and polarity set to active low is sign that this is the case so we |
| * disable pwm control to protect the user. */ |
| int tmp = it87_read_value(data, IT87_REG_FAN_CTL); |
| if ((tmp & 0x87) == 0) { |
| if (fix_pwm_polarity) { |
| /* The user asks us to attempt a chip reconfiguration. |
| * This means switching to active high polarity and |
| * inverting all fan speed values. */ |
| int i; |
| u8 pwm[3]; |
| |
| for (i = 0; i < 3; i++) |
| pwm[i] = it87_read_value(data, |
| IT87_REG_PWM(i)); |
| |
| /* If any fan is in automatic pwm mode, the polarity |
| * might be correct, as suspicious as it seems, so we |
| * better don't change anything (but still disable the |
| * PWM interface). */ |
| if (!((pwm[0] | pwm[1] | pwm[2]) & 0x80)) { |
| dev_info(dev, "Reconfiguring PWM to " |
| "active high polarity\n"); |
| it87_write_value(data, IT87_REG_FAN_CTL, |
| tmp | 0x87); |
| for (i = 0; i < 3; i++) |
| it87_write_value(data, |
| IT87_REG_PWM(i), |
| 0x7f & ~pwm[i]); |
| return 1; |
| } |
| |
| dev_info(dev, "PWM configuration is " |
| "too broken to be fixed\n"); |
| } |
| |
| dev_info(dev, "Detected broken BIOS " |
| "defaults, disabling PWM interface\n"); |
| return 0; |
| } else if (fix_pwm_polarity) { |
| dev_info(dev, "PWM configuration looks " |
| "sane, won't touch\n"); |
| } |
| |
| return 1; |
| } |
| |
| /* Called when we have found a new IT87. */ |
| static void __devinit it87_init_device(struct platform_device *pdev) |
| { |
| struct it87_data *data = platform_get_drvdata(pdev); |
| int tmp, i; |
| |
| /* initialize to sane defaults: |
| * - if the chip is in manual pwm mode, this will be overwritten with |
| * the actual settings on the chip (so in this case, initialization |
| * is not needed) |
| * - if in automatic or on/off mode, we could switch to manual mode, |
| * read the registers and set manual_pwm_ctl accordingly, but currently |
| * this is not implemented, so we initialize to something sane */ |
| for (i = 0; i < 3; i++) { |
| data->manual_pwm_ctl[i] = 0xff; |
| } |
| |
| /* Some chips seem to have default value 0xff for all limit |
| * registers. For low voltage limits it makes no sense and triggers |
| * alarms, so change to 0 instead. For high temperature limits, it |
| * means -1 degree C, which surprisingly doesn't trigger an alarm, |
| * but is still confusing, so change to 127 degrees C. */ |
| for (i = 0; i < 8; i++) { |
| tmp = it87_read_value(data, IT87_REG_VIN_MIN(i)); |
| if (tmp == 0xff) |
| it87_write_value(data, IT87_REG_VIN_MIN(i), 0); |
| } |
| for (i = 0; i < 3; i++) { |
| tmp = it87_read_value(data, IT87_REG_TEMP_HIGH(i)); |
| if (tmp == 0xff) |
| it87_write_value(data, IT87_REG_TEMP_HIGH(i), 127); |
| } |
| |
| /* Check if temperature channnels are reset manually or by some reason */ |
| tmp = it87_read_value(data, IT87_REG_TEMP_ENABLE); |
| if ((tmp & 0x3f) == 0) { |
| /* Temp1,Temp3=thermistor; Temp2=thermal diode */ |
| tmp = (tmp & 0xc0) | 0x2a; |
| it87_write_value(data, IT87_REG_TEMP_ENABLE, tmp); |
| } |
| data->sensor = tmp; |
| |
| /* Check if voltage monitors are reset manually or by some reason */ |
| tmp = it87_read_value(data, IT87_REG_VIN_ENABLE); |
| if ((tmp & 0xff) == 0) { |
| /* Enable all voltage monitors */ |
| it87_write_value(data, IT87_REG_VIN_ENABLE, 0xff); |
| } |
| |
| /* Check if tachometers are reset manually or by some reason */ |
| data->fan_main_ctrl = it87_read_value(data, IT87_REG_FAN_MAIN_CTRL); |
| if ((data->fan_main_ctrl & 0x70) == 0) { |
| /* Enable all fan tachometers */ |
| data->fan_main_ctrl |= 0x70; |
| it87_write_value(data, IT87_REG_FAN_MAIN_CTRL, data->fan_main_ctrl); |
| } |
| data->has_fan = (data->fan_main_ctrl >> 4) & 0x07; |
| |
| /* Set tachometers to 16-bit mode if needed */ |
| if (data->type == it8716 || data->type == it8718) { |
| tmp = it87_read_value(data, IT87_REG_FAN_16BIT); |
| if (~tmp & 0x07 & data->has_fan) { |
| dev_dbg(&pdev->dev, |
| "Setting fan1-3 to 16-bit mode\n"); |
| it87_write_value(data, IT87_REG_FAN_16BIT, |
| tmp | 0x07); |
| } |
| if (tmp & (1 << 4)) |
| data->has_fan |= (1 << 3); /* fan4 enabled */ |
| if (tmp & (1 << 5)) |
| data->has_fan |= (1 << 4); /* fan5 enabled */ |
| } |
| |
| /* Set current fan mode registers and the default settings for the |
| * other mode registers */ |
| for (i = 0; i < 3; i++) { |
| if (data->fan_main_ctrl & (1 << i)) { |
| /* pwm mode */ |
| tmp = it87_read_value(data, IT87_REG_PWM(i)); |
| if (tmp & 0x80) { |
| /* automatic pwm - not yet implemented, but |
| * leave the settings made by the BIOS alone |
| * until a change is requested via the sysfs |
| * interface */ |
| } else { |
| /* manual pwm */ |
| data->manual_pwm_ctl[i] = PWM_FROM_REG(tmp); |
| } |
| } |
| } |
| |
| /* Start monitoring */ |
| it87_write_value(data, IT87_REG_CONFIG, |
| (it87_read_value(data, IT87_REG_CONFIG) & 0x36) |
| | (update_vbat ? 0x41 : 0x01)); |
| } |
| |
| static struct it87_data *it87_update_device(struct device *dev) |
| { |
| struct it87_data *data = dev_get_drvdata(dev); |
| int i; |
| |
| mutex_lock(&data->update_lock); |
| |
| if (time_after(jiffies, data->last_updated + HZ + HZ / 2) |
| || !data->valid) { |
| |
| if (update_vbat) { |
| /* Cleared after each update, so reenable. Value |
| returned by this read will be previous value */ |
| it87_write_value(data, IT87_REG_CONFIG, |
| it87_read_value(data, IT87_REG_CONFIG) | 0x40); |
| } |
| for (i = 0; i <= 7; i++) { |
| data->in[i] = |
| it87_read_value(data, IT87_REG_VIN(i)); |
| data->in_min[i] = |
| it87_read_value(data, IT87_REG_VIN_MIN(i)); |
| data->in_max[i] = |
| it87_read_value(data, IT87_REG_VIN_MAX(i)); |
| } |
| /* in8 (battery) has no limit registers */ |
| data->in[8] = |
| it87_read_value(data, IT87_REG_VIN(8)); |
| |
| for (i = 0; i < 5; i++) { |
| /* Skip disabled fans */ |
| if (!(data->has_fan & (1 << i))) |
| continue; |
| |
| data->fan_min[i] = |
| it87_read_value(data, IT87_REG_FAN_MIN[i]); |
| data->fan[i] = it87_read_value(data, |
| IT87_REG_FAN[i]); |
| /* Add high byte if in 16-bit mode */ |
| if (data->type == it8716 || data->type == it8718) { |
| data->fan[i] |= it87_read_value(data, |
| IT87_REG_FANX[i]) << 8; |
| data->fan_min[i] |= it87_read_value(data, |
| IT87_REG_FANX_MIN[i]) << 8; |
| } |
| } |
| for (i = 0; i < 3; i++) { |
| data->temp[i] = |
| it87_read_value(data, IT87_REG_TEMP(i)); |
| data->temp_high[i] = |
| it87_read_value(data, IT87_REG_TEMP_HIGH(i)); |
| data->temp_low[i] = |
| it87_read_value(data, IT87_REG_TEMP_LOW(i)); |
| } |
| |
| /* Newer chips don't have clock dividers */ |
| if ((data->has_fan & 0x07) && data->type != it8716 |
| && data->type != it8718) { |
| i = it87_read_value(data, IT87_REG_FAN_DIV); |
| data->fan_div[0] = i & 0x07; |
| data->fan_div[1] = (i >> 3) & 0x07; |
| data->fan_div[2] = (i & 0x40) ? 3 : 1; |
| } |
| |
| data->alarms = |
| it87_read_value(data, IT87_REG_ALARM1) | |
| (it87_read_value(data, IT87_REG_ALARM2) << 8) | |
| (it87_read_value(data, IT87_REG_ALARM3) << 16); |
| data->fan_main_ctrl = it87_read_value(data, |
| IT87_REG_FAN_MAIN_CTRL); |
| data->fan_ctl = it87_read_value(data, IT87_REG_FAN_CTL); |
| |
| data->sensor = it87_read_value(data, IT87_REG_TEMP_ENABLE); |
| /* The 8705 does not have VID capability */ |
| if (data->type == it8712 || data->type == it8716) { |
| data->vid = it87_read_value(data, IT87_REG_VID); |
| /* The older IT8712F revisions had only 5 VID pins, |
| but we assume it is always safe to read 6 bits. */ |
| data->vid &= 0x3f; |
| } |
| data->last_updated = jiffies; |
| data->valid = 1; |
| } |
| |
| mutex_unlock(&data->update_lock); |
| |
| return data; |
| } |
| |
| static int __init it87_device_add(unsigned short address, |
| const struct it87_sio_data *sio_data) |
| { |
| struct resource res = { |
| .start = address + IT87_EC_OFFSET, |
| .end = address + IT87_EC_OFFSET + IT87_EC_EXTENT - 1, |
| .name = DRVNAME, |
| .flags = IORESOURCE_IO, |
| }; |
| int err; |
| |
| pdev = platform_device_alloc(DRVNAME, address); |
| if (!pdev) { |
| err = -ENOMEM; |
| printk(KERN_ERR DRVNAME ": Device allocation failed\n"); |
| goto exit; |
| } |
| |
| err = platform_device_add_resources(pdev, &res, 1); |
| if (err) { |
| printk(KERN_ERR DRVNAME ": Device resource addition failed " |
| "(%d)\n", err); |
| goto exit_device_put; |
| } |
| |
| err = platform_device_add_data(pdev, sio_data, |
| sizeof(struct it87_sio_data)); |
| if (err) { |
| printk(KERN_ERR DRVNAME ": Platform data allocation failed\n"); |
| goto exit_device_put; |
| } |
| |
| err = platform_device_add(pdev); |
| if (err) { |
| printk(KERN_ERR DRVNAME ": Device addition failed (%d)\n", |
| err); |
| goto exit_device_put; |
| } |
| |
| return 0; |
| |
| exit_device_put: |
| platform_device_put(pdev); |
| exit: |
| return err; |
| } |
| |
| static int __init sm_it87_init(void) |
| { |
| int err; |
| unsigned short isa_address=0; |
| struct it87_sio_data sio_data; |
| |
| err = it87_find(&isa_address, &sio_data); |
| if (err) |
| return err; |
| err = platform_driver_register(&it87_driver); |
| if (err) |
| return err; |
| |
| err = it87_device_add(isa_address, &sio_data); |
| if (err){ |
| platform_driver_unregister(&it87_driver); |
| return err; |
| } |
| |
| return 0; |
| } |
| |
| static void __exit sm_it87_exit(void) |
| { |
| platform_device_unregister(pdev); |
| platform_driver_unregister(&it87_driver); |
| } |
| |
| |
| MODULE_AUTHOR("Chris Gauthron, " |
| "Jean Delvare <khali@linux-fr.org>"); |
| MODULE_DESCRIPTION("IT8705F/8712F/8716F/8718F/8726F, SiS950 driver"); |
| module_param(update_vbat, bool, 0); |
| MODULE_PARM_DESC(update_vbat, "Update vbat if set else return powerup value"); |
| module_param(fix_pwm_polarity, bool, 0); |
| MODULE_PARM_DESC(fix_pwm_polarity, "Force PWM polarity to active high (DANGEROUS)"); |
| MODULE_LICENSE("GPL"); |
| |
| module_init(sm_it87_init); |
| module_exit(sm_it87_exit); |