/* * f71805f.c - driver for the Fintek F71805F/FG Super-I/O chip integrated * hardware monitoring features * Copyright (C) 2005 Jean Delvare <khali@linux-fr.org> * * The F71805F/FG is a LPC Super-I/O chip made by Fintek. It integrates * complete hardware monitoring features: voltage, fan and temperature * sensors, and manual and automatic fan speed control. * * 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/err.h> #include <linux/mutex.h> #include <asm/io.h> static struct platform_device *pdev; #define DRVNAME "f71805f" /* * Super-I/O constants and functions */ #define F71805F_LD_HWM 0x04 #define SIO_REG_LDSEL 0x07 /* Logical device select */ #define SIO_REG_DEVID 0x20 /* Device ID (2 bytes) */ #define SIO_REG_DEVREV 0x22 /* Device revision */ #define SIO_REG_MANID 0x23 /* Fintek ID (2 bytes) */ #define SIO_REG_ENABLE 0x30 /* Logical device enable */ #define SIO_REG_ADDR 0x60 /* Logical device address (2 bytes) */ #define SIO_FINTEK_ID 0x1934 #define SIO_F71805F_ID 0x0406 static inline int superio_inb(int base, int reg) { outb(reg, base); return inb(base + 1); } static int superio_inw(int base, int reg) { int val; outb(reg++, base); val = inb(base + 1) << 8; outb(reg, base); val |= inb(base + 1); return val; } static inline void superio_select(int base, int ld) { outb(SIO_REG_LDSEL, base); outb(ld, base + 1); } static inline void superio_enter(int base) { outb(0x87, base); outb(0x87, base); } static inline void superio_exit(int base) { outb(0xaa, base); } /* * ISA constants */ #define REGION_LENGTH 2 #define ADDR_REG_OFFSET 0 #define DATA_REG_OFFSET 1 static struct resource f71805f_resource __initdata = { .flags = IORESOURCE_IO, }; /* * Registers */ /* in nr from 0 to 8 (8-bit values) */ #define F71805F_REG_IN(nr) (0x10 + (nr)) #define F71805F_REG_IN_HIGH(nr) (0x40 + 2 * (nr)) #define F71805F_REG_IN_LOW(nr) (0x41 + 2 * (nr)) /* fan nr from 0 to 2 (12-bit values, two registers) */ #define F71805F_REG_FAN(nr) (0x20 + 2 * (nr)) #define F71805F_REG_FAN_LOW(nr) (0x28 + 2 * (nr)) #define F71805F_REG_FAN_CTRL(nr) (0x60 + 16 * (nr)) /* temp nr from 0 to 2 (8-bit values) */ #define F71805F_REG_TEMP(nr) (0x1B + (nr)) #define F71805F_REG_TEMP_HIGH(nr) (0x54 + 2 * (nr)) #define F71805F_REG_TEMP_HYST(nr) (0x55 + 2 * (nr)) #define F71805F_REG_TEMP_MODE 0x01 #define F71805F_REG_START 0x00 /* status nr from 0 to 2 */ #define F71805F_REG_STATUS(nr) (0x36 + (nr)) /* * Data structures and manipulation thereof */ struct f71805f_data { unsigned short addr; const char *name; struct mutex lock; struct class_device *class_dev; struct mutex update_lock; char valid; /* !=0 if following fields are valid */ unsigned long last_updated; /* In jiffies */ unsigned long last_limits; /* In jiffies */ /* Register values */ u8 in[9]; u8 in_high[9]; u8 in_low[9]; u16 fan[3]; u16 fan_low[3]; u8 fan_enabled; /* Read once at init time */ u8 temp[3]; u8 temp_high[3]; u8 temp_hyst[3]; u8 temp_mode; u8 alarms[3]; }; static inline long in_from_reg(u8 reg) { return (reg * 8); } /* The 2 least significant bits are not used */ static inline u8 in_to_reg(long val) { if (val <= 0) return 0; if (val >= 2016) return 0xfc; return (((val + 16) / 32) << 2); } /* in0 is downscaled by a factor 2 internally */ static inline long in0_from_reg(u8 reg) { return (reg * 16); } static inline u8 in0_to_reg(long val) { if (val <= 0) return 0; if (val >= 4032) return 0xfc; return (((val + 32) / 64) << 2); } /* The 4 most significant bits are not used */ static inline long fan_from_reg(u16 reg) { reg &= 0xfff; if (!reg || reg == 0xfff) return 0; return (1500000 / reg); } static inline u16 fan_to_reg(long rpm) { /* If the low limit is set below what the chip can measure, store the largest possible 12-bit value in the registers, so that no alarm will ever trigger. */ if (rpm < 367) return 0xfff; return (1500000 / rpm); } static inline long temp_from_reg(u8 reg) { return (reg * 1000); } static inline u8 temp_to_reg(long val) { if (val < 0) val = 0; else if (val > 1000 * 0xff) val = 0xff; return ((val + 500) / 1000); } /* * Device I/O access */ static u8 f71805f_read8(struct f71805f_data *data, u8 reg) { u8 val; mutex_lock(&data->lock); outb(reg, data->addr + ADDR_REG_OFFSET); val = inb(data->addr + DATA_REG_OFFSET); mutex_unlock(&data->lock); return val; } static void f71805f_write8(struct f71805f_data *data, u8 reg, u8 val) { mutex_lock(&data->lock); outb(reg, data->addr + ADDR_REG_OFFSET); outb(val, data->addr + DATA_REG_OFFSET); mutex_unlock(&data->lock); } /* It is important to read the MSB first, because doing so latches the value of the LSB, so we are sure both bytes belong to the same value. */ static u16 f71805f_read16(struct f71805f_data *data, u8 reg) { u16 val; mutex_lock(&data->lock); outb(reg, data->addr + ADDR_REG_OFFSET); val = inb(data->addr + DATA_REG_OFFSET) << 8; outb(++reg, data->addr + ADDR_REG_OFFSET); val |= inb(data->addr + DATA_REG_OFFSET); mutex_unlock(&data->lock); return val; } static void f71805f_write16(struct f71805f_data *data, u8 reg, u16 val) { mutex_lock(&data->lock); outb(reg, data->addr + ADDR_REG_OFFSET); outb(val >> 8, data->addr + DATA_REG_OFFSET); outb(++reg, data->addr + ADDR_REG_OFFSET); outb(val & 0xff, data->addr + DATA_REG_OFFSET); mutex_unlock(&data->lock); } static struct f71805f_data *f71805f_update_device(struct device *dev) { struct f71805f_data *data = dev_get_drvdata(dev); int nr; mutex_lock(&data->update_lock); /* Limit registers cache is refreshed after 60 seconds */ if (time_after(jiffies, data->last_updated + 60 * HZ) || !data->valid) { for (nr = 0; nr < 9; nr++) { data->in_high[nr] = f71805f_read8(data, F71805F_REG_IN_HIGH(nr)); data->in_low[nr] = f71805f_read8(data, F71805F_REG_IN_LOW(nr)); } for (nr = 0; nr < 3; nr++) { if (data->fan_enabled & (1 << nr)) data->fan_low[nr] = f71805f_read16(data, F71805F_REG_FAN_LOW(nr)); } for (nr = 0; nr < 3; nr++) { data->temp_high[nr] = f71805f_read8(data, F71805F_REG_TEMP_HIGH(nr)); data->temp_hyst[nr] = f71805f_read8(data, F71805F_REG_TEMP_HYST(nr)); } data->temp_mode = f71805f_read8(data, F71805F_REG_TEMP_MODE); data->last_limits = jiffies; } /* Measurement registers cache is refreshed after 1 second */ if (time_after(jiffies, data->last_updated + HZ) || !data->valid) { for (nr = 0; nr < 9; nr++) { data->in[nr] = f71805f_read8(data, F71805F_REG_IN(nr)); } for (nr = 0; nr < 3; nr++) { if (data->fan_enabled & (1 << nr)) data->fan[nr] = f71805f_read16(data, F71805F_REG_FAN(nr)); } for (nr = 0; nr < 3; nr++) { data->temp[nr] = f71805f_read8(data, F71805F_REG_TEMP(nr)); } for (nr = 0; nr < 3; nr++) { data->alarms[nr] = f71805f_read8(data, F71805F_REG_STATUS(nr)); } data->last_updated = jiffies; data->valid = 1; } mutex_unlock(&data->update_lock); return data; } /* * Sysfs interface */ static ssize_t show_in0(struct device *dev, struct device_attribute *devattr, char *buf) { struct f71805f_data *data = f71805f_update_device(dev); return sprintf(buf, "%ld\n", in0_from_reg(data->in[0])); } static ssize_t show_in0_max(struct device *dev, struct device_attribute *devattr, char *buf) { struct f71805f_data *data = f71805f_update_device(dev); return sprintf(buf, "%ld\n", in0_from_reg(data->in_high[0])); } static ssize_t show_in0_min(struct device *dev, struct device_attribute *devattr, char *buf) { struct f71805f_data *data = f71805f_update_device(dev); return sprintf(buf, "%ld\n", in0_from_reg(data->in_low[0])); } static ssize_t set_in0_max(struct device *dev, struct device_attribute *devattr, const char *buf, size_t count) { struct f71805f_data *data = dev_get_drvdata(dev); long val = simple_strtol(buf, NULL, 10); mutex_lock(&data->update_lock); data->in_high[0] = in0_to_reg(val); f71805f_write8(data, F71805F_REG_IN_HIGH(0), data->in_high[0]); mutex_unlock(&data->update_lock); return count; } static ssize_t set_in0_min(struct device *dev, struct device_attribute *devattr, const char *buf, size_t count) { struct f71805f_data *data = dev_get_drvdata(dev); long val = simple_strtol(buf, NULL, 10); mutex_lock(&data->update_lock); data->in_low[0] = in0_to_reg(val); f71805f_write8(data, F71805F_REG_IN_LOW(0), data->in_low[0]); mutex_unlock(&data->update_lock); return count; } static ssize_t show_in(struct device *dev, struct device_attribute *devattr, char *buf) { struct f71805f_data *data = f71805f_update_device(dev); struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); int nr = attr->index; return sprintf(buf, "%ld\n", in_from_reg(data->in[nr])); } static ssize_t show_in_max(struct device *dev, struct device_attribute *devattr, char *buf) { struct f71805f_data *data = f71805f_update_device(dev); struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); int nr = attr->index; return sprintf(buf, "%ld\n", in_from_reg(data->in_high[nr])); } static ssize_t show_in_min(struct device *dev, struct device_attribute *devattr, char *buf) { struct f71805f_data *data = f71805f_update_device(dev); struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); int nr = attr->index; return sprintf(buf, "%ld\n", in_from_reg(data->in_low[nr])); } static ssize_t set_in_max(struct device *dev, struct device_attribute *devattr, const char *buf, size_t count) { struct f71805f_data *data = dev_get_drvdata(dev); struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); int nr = attr->index; long val = simple_strtol(buf, NULL, 10); mutex_lock(&data->update_lock); data->in_high[nr] = in_to_reg(val); f71805f_write8(data, F71805F_REG_IN_HIGH(nr), data->in_high[nr]); mutex_unlock(&data->update_lock); return count; } static ssize_t set_in_min(struct device *dev, struct device_attribute *devattr, const char *buf, size_t count) { struct f71805f_data *data = dev_get_drvdata(dev); struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); int nr = attr->index; long val = simple_strtol(buf, NULL, 10); mutex_lock(&data->update_lock); data->in_low[nr] = in_to_reg(val); f71805f_write8(data, F71805F_REG_IN_LOW(nr), data->in_low[nr]); mutex_unlock(&data->update_lock); return count; } static ssize_t show_fan(struct device *dev, struct device_attribute *devattr, char *buf) { struct f71805f_data *data = f71805f_update_device(dev); struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); int nr = attr->index; return sprintf(buf, "%ld\n", fan_from_reg(data->fan[nr])); } static ssize_t show_fan_min(struct device *dev, struct device_attribute *devattr, char *buf) { struct f71805f_data *data = f71805f_update_device(dev); struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); int nr = attr->index; return sprintf(buf, "%ld\n", fan_from_reg(data->fan_low[nr])); } static ssize_t set_fan_min(struct device *dev, struct device_attribute *devattr, const char *buf, size_t count) { struct f71805f_data *data = dev_get_drvdata(dev); struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); int nr = attr->index; long val = simple_strtol(buf, NULL, 10); mutex_lock(&data->update_lock); data->fan_low[nr] = fan_to_reg(val); f71805f_write16(data, F71805F_REG_FAN_LOW(nr), data->fan_low[nr]); mutex_unlock(&data->update_lock); return count; } static ssize_t show_temp(struct device *dev, struct device_attribute *devattr, char *buf) { struct f71805f_data *data = f71805f_update_device(dev); struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); int nr = attr->index; return sprintf(buf, "%ld\n", temp_from_reg(data->temp[nr])); } static ssize_t show_temp_max(struct device *dev, struct device_attribute *devattr, char *buf) { struct f71805f_data *data = f71805f_update_device(dev); struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); int nr = attr->index; return sprintf(buf, "%ld\n", temp_from_reg(data->temp_high[nr])); } static ssize_t show_temp_hyst(struct device *dev, struct device_attribute *devattr, char *buf) { struct f71805f_data *data = f71805f_update_device(dev); struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); int nr = attr->index; return sprintf(buf, "%ld\n", temp_from_reg(data->temp_hyst[nr])); } static ssize_t show_temp_type(struct device *dev, struct device_attribute *devattr, char *buf) { struct f71805f_data *data = f71805f_update_device(dev); struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); int nr = attr->index; /* 3 is diode, 4 is thermistor */ return sprintf(buf, "%u\n", (data->temp_mode & (1 << nr)) ? 3 : 4); } static ssize_t set_temp_max(struct device *dev, struct device_attribute *devattr, const char *buf, size_t count) { struct f71805f_data *data = dev_get_drvdata(dev); struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); int nr = attr->index; long val = simple_strtol(buf, NULL, 10); mutex_lock(&data->update_lock); data->temp_high[nr] = temp_to_reg(val); f71805f_write8(data, F71805F_REG_TEMP_HIGH(nr), data->temp_high[nr]); mutex_unlock(&data->update_lock); return count; } static ssize_t set_temp_hyst(struct device *dev, struct device_attribute *devattr, const char *buf, size_t count) { struct f71805f_data *data = dev_get_drvdata(dev); struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); int nr = attr->index; long val = simple_strtol(buf, NULL, 10); mutex_lock(&data->update_lock); data->temp_hyst[nr] = temp_to_reg(val); f71805f_write8(data, F71805F_REG_TEMP_HYST(nr), data->temp_hyst[nr]); mutex_unlock(&data->update_lock); return count; } static ssize_t show_alarms_in(struct device *dev, struct device_attribute *devattr, char *buf) { struct f71805f_data *data = f71805f_update_device(dev); return sprintf(buf, "%d\n", data->alarms[0] | ((data->alarms[1] & 0x01) << 8)); } static ssize_t show_alarms_fan(struct device *dev, struct device_attribute *devattr, char *buf) { struct f71805f_data *data = f71805f_update_device(dev); return sprintf(buf, "%d\n", data->alarms[2] & 0x07); } static ssize_t show_alarms_temp(struct device *dev, struct device_attribute *devattr, char *buf) { struct f71805f_data *data = f71805f_update_device(dev); return sprintf(buf, "%d\n", (data->alarms[1] >> 3) & 0x07); } static ssize_t show_name(struct device *dev, struct device_attribute *devattr, char *buf) { struct f71805f_data *data = dev_get_drvdata(dev); return sprintf(buf, "%s\n", data->name); } static struct device_attribute f71805f_dev_attr[] = { __ATTR(in0_input, S_IRUGO, show_in0, NULL), __ATTR(in0_max, S_IRUGO| S_IWUSR, show_in0_max, set_in0_max), __ATTR(in0_min, S_IRUGO| S_IWUSR, show_in0_min, set_in0_min), __ATTR(alarms_in, S_IRUGO, show_alarms_in, NULL), __ATTR(alarms_fan, S_IRUGO, show_alarms_fan, NULL), __ATTR(alarms_temp, S_IRUGO, show_alarms_temp, NULL), __ATTR(name, S_IRUGO, show_name, NULL), }; static struct sensor_device_attribute f71805f_sensor_attr[] = { SENSOR_ATTR(in1_input, S_IRUGO, show_in, NULL, 1), SENSOR_ATTR(in1_max, S_IRUGO | S_IWUSR, show_in_max, set_in_max, 1), SENSOR_ATTR(in1_min, S_IRUGO | S_IWUSR, show_in_min, set_in_min, 1), SENSOR_ATTR(in2_input, S_IRUGO, show_in, NULL, 2), SENSOR_ATTR(in2_max, S_IRUGO | S_IWUSR, show_in_max, set_in_max, 2), SENSOR_ATTR(in2_min, S_IRUGO | S_IWUSR, show_in_min, set_in_min, 2), SENSOR_ATTR(in3_input, S_IRUGO, show_in, NULL, 3), SENSOR_ATTR(in3_max, S_IRUGO | S_IWUSR, show_in_max, set_in_max, 3), SENSOR_ATTR(in3_min, S_IRUGO | S_IWUSR, show_in_min, set_in_min, 3), SENSOR_ATTR(in4_input, S_IRUGO, show_in, NULL, 4), SENSOR_ATTR(in4_max, S_IRUGO | S_IWUSR, show_in_max, set_in_max, 4), SENSOR_ATTR(in4_min, S_IRUGO | S_IWUSR, show_in_min, set_in_min, 4), SENSOR_ATTR(in5_input, S_IRUGO, show_in, NULL, 5), SENSOR_ATTR(in5_max, S_IRUGO | S_IWUSR, show_in_max, set_in_max, 5), SENSOR_ATTR(in5_min, S_IRUGO | S_IWUSR, show_in_min, set_in_min, 5), SENSOR_ATTR(in6_input, S_IRUGO, show_in, NULL, 6), SENSOR_ATTR(in6_max, S_IRUGO | S_IWUSR, show_in_max, set_in_max, 6), SENSOR_ATTR(in6_min, S_IRUGO | S_IWUSR, show_in_min, set_in_min, 6), SENSOR_ATTR(in7_input, S_IRUGO, show_in, NULL, 7), SENSOR_ATTR(in7_max, S_IRUGO | S_IWUSR, show_in_max, set_in_max, 7), SENSOR_ATTR(in7_min, S_IRUGO | S_IWUSR, show_in_min, set_in_min, 7), SENSOR_ATTR(in8_input, S_IRUGO, show_in, NULL, 8), SENSOR_ATTR(in8_max, S_IRUGO | S_IWUSR, show_in_max, set_in_max, 8), SENSOR_ATTR(in8_min, S_IRUGO | S_IWUSR, show_in_min, set_in_min, 8), SENSOR_ATTR(temp1_input, S_IRUGO, show_temp, NULL, 0), SENSOR_ATTR(temp1_max, S_IRUGO | S_IWUSR, show_temp_max, set_temp_max, 0), SENSOR_ATTR(temp1_max_hyst, S_IRUGO | S_IWUSR, show_temp_hyst, set_temp_hyst, 0), SENSOR_ATTR(temp1_type, S_IRUGO, show_temp_type, NULL, 0), SENSOR_ATTR(temp2_input, S_IRUGO, show_temp, NULL, 1), SENSOR_ATTR(temp2_max, S_IRUGO | S_IWUSR, show_temp_max, set_temp_max, 1), SENSOR_ATTR(temp2_max_hyst, S_IRUGO | S_IWUSR, show_temp_hyst, set_temp_hyst, 1), SENSOR_ATTR(temp2_type, S_IRUGO, show_temp_type, NULL, 1), SENSOR_ATTR(temp3_input, S_IRUGO, show_temp, NULL, 2), SENSOR_ATTR(temp3_max, S_IRUGO | S_IWUSR, show_temp_max, set_temp_max, 2), SENSOR_ATTR(temp3_max_hyst, S_IRUGO | S_IWUSR, show_temp_hyst, set_temp_hyst, 2), SENSOR_ATTR(temp3_type, S_IRUGO, show_temp_type, NULL, 2), }; static struct sensor_device_attribute f71805f_fan_attr[] = { SENSOR_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0), SENSOR_ATTR(fan1_min, S_IRUGO | S_IWUSR, show_fan_min, set_fan_min, 0), SENSOR_ATTR(fan2_input, S_IRUGO, show_fan, NULL, 1), SENSOR_ATTR(fan2_min, S_IRUGO | S_IWUSR, show_fan_min, set_fan_min, 1), SENSOR_ATTR(fan3_input, S_IRUGO, show_fan, NULL, 2), SENSOR_ATTR(fan3_min, S_IRUGO | S_IWUSR, show_fan_min, set_fan_min, 2), }; /* * Device registration and initialization */ static void __devinit f71805f_init_device(struct f71805f_data *data) { u8 reg; int i; reg = f71805f_read8(data, F71805F_REG_START); if ((reg & 0x41) != 0x01) { printk(KERN_DEBUG DRVNAME ": Starting monitoring " "operations\n"); f71805f_write8(data, F71805F_REG_START, (reg | 0x01) & ~0x40); } /* Fan monitoring can be disabled. If it is, we won't be polling the register values, and won't create the related sysfs files. */ for (i = 0; i < 3; i++) { reg = f71805f_read8(data, F71805F_REG_FAN_CTRL(i)); if (!(reg & 0x80)) data->fan_enabled |= (1 << i); } } static int __devinit f71805f_probe(struct platform_device *pdev) { struct f71805f_data *data; struct resource *res; int i, err; if (!(data = kzalloc(sizeof(struct f71805f_data), GFP_KERNEL))) { err = -ENOMEM; printk(KERN_ERR DRVNAME ": Out of memory\n"); goto exit; } res = platform_get_resource(pdev, IORESOURCE_IO, 0); data->addr = res->start; mutex_init(&data->lock); data->name = "f71805f"; mutex_init(&data->update_lock); platform_set_drvdata(pdev, data); data->class_dev = hwmon_device_register(&pdev->dev); if (IS_ERR(data->class_dev)) { err = PTR_ERR(data->class_dev); dev_err(&pdev->dev, "Class registration failed (%d)\n", err); goto exit_free; } /* Initialize the F71805F chip */ f71805f_init_device(data); /* Register sysfs interface files */ for (i = 0; i < ARRAY_SIZE(f71805f_dev_attr); i++) { err = device_create_file(&pdev->dev, &f71805f_dev_attr[i]); if (err) goto exit_class; } for (i = 0; i < ARRAY_SIZE(f71805f_sensor_attr); i++) { err = device_create_file(&pdev->dev, &f71805f_sensor_attr[i].dev_attr); if (err) goto exit_class; } for (i = 0; i < ARRAY_SIZE(f71805f_fan_attr); i++) { if (!(data->fan_enabled & (1 << (i / 2)))) continue; err = device_create_file(&pdev->dev, &f71805f_fan_attr[i].dev_attr); if (err) goto exit_class; } return 0; exit_class: dev_err(&pdev->dev, "Sysfs interface creation failed\n"); hwmon_device_unregister(data->class_dev); exit_free: kfree(data); exit: return err; } static int __devexit f71805f_remove(struct platform_device *pdev) { struct f71805f_data *data = platform_get_drvdata(pdev); platform_set_drvdata(pdev, NULL); hwmon_device_unregister(data->class_dev); kfree(data); return 0; } static struct platform_driver f71805f_driver = { .driver = { .owner = THIS_MODULE, .name = DRVNAME, }, .probe = f71805f_probe, .remove = __devexit_p(f71805f_remove), }; static int __init f71805f_device_add(unsigned short address) { int err; pdev = platform_device_alloc(DRVNAME, address); if (!pdev) { err = -ENOMEM; printk(KERN_ERR DRVNAME ": Device allocation failed\n"); goto exit; } f71805f_resource.start = address; f71805f_resource.end = address + REGION_LENGTH - 1; f71805f_resource.name = pdev->name; err = platform_device_add_resources(pdev, &f71805f_resource, 1); if (err) { printk(KERN_ERR DRVNAME ": Device resource addition failed " "(%d)\n", err); 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 f71805f_find(int sioaddr, unsigned short *address) { int err = -ENODEV; u16 devid; superio_enter(sioaddr); devid = superio_inw(sioaddr, SIO_REG_MANID); if (devid != SIO_FINTEK_ID) goto exit; devid = superio_inw(sioaddr, SIO_REG_DEVID); if (devid != SIO_F71805F_ID) { printk(KERN_INFO DRVNAME ": Unsupported Fintek device, " "skipping\n"); goto exit; } superio_select(sioaddr, F71805F_LD_HWM); if (!(superio_inb(sioaddr, SIO_REG_ENABLE) & 0x01)) { printk(KERN_WARNING DRVNAME ": Device not activated, " "skipping\n"); goto exit; } *address = superio_inw(sioaddr, SIO_REG_ADDR); if (*address == 0) { printk(KERN_WARNING DRVNAME ": Base address not set, " "skipping\n"); goto exit; } err = 0; printk(KERN_INFO DRVNAME ": Found F71805F chip at %#x, revision %u\n", *address, superio_inb(sioaddr, SIO_REG_DEVREV)); exit: superio_exit(sioaddr); return err; } static int __init f71805f_init(void) { int err; unsigned short address; if (f71805f_find(0x2e, &address) && f71805f_find(0x4e, &address)) return -ENODEV; err = platform_driver_register(&f71805f_driver); if (err) goto exit; /* Sets global pdev as a side effect */ err = f71805f_device_add(address); if (err) goto exit_driver; return 0; exit_driver: platform_driver_unregister(&f71805f_driver); exit: return err; } static void __exit f71805f_exit(void) { platform_device_unregister(pdev); platform_driver_unregister(&f71805f_driver); } MODULE_AUTHOR("Jean Delvare <khali@linux-fr>"); MODULE_LICENSE("GPL"); MODULE_DESCRIPTION("F71805F hardware monitoring driver"); module_init(f71805f_init); module_exit(f71805f_exit);