/* it87.c - Part of lm_sensors, Linux kernel modules for hardware monitoring. 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 <chrisg@0-in.com> 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 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 /* Where are the ISA address/data registers relative to the base address */ #define IT87_ADDR_REG_OFFSET 5 #define IT87_DATA_REG_OFFSET 6 /*----- 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) */ #define IT87_REG_FAN(nr) (0x0d + (nr)) #define IT87_REG_FAN_MIN(nr) (0x10 + (nr)) #define IT87_REG_FANX(nr) (0x18 + (nr)) #define IT87_REG_FANX_MIN(nr) (0x1b + (nr)) #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 class_device *class_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[3]; /* Register values, possibly combined */ u16 fan_min[3]; /* 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); /* 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 = it87_update_device(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_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 = 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_EXTENT, DRVNAME)) { dev_err(dev, "Failed to request region 0x%lx-0x%lx\n", (unsigned long)res->start, (unsigned long)(res->start + IT87_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; } } 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->class_dev = hwmon_device_register(dev); if (IS_ERR(data->class_dev)) { err = PTR_ERR(data->class_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_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->class_dev); sysfs_remove_group(&pdev->dev.kobj, &it87_group); sysfs_remove_group(&pdev->dev.kobj, &it87_group_opt); release_region(data->addr, IT87_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); } } /* 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 < 3; 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 , .end = address + IT87_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 <chrisg@0-in.com>, " "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);