diff options
Diffstat (limited to 'drivers/hwmon/pc87427.c')
| -rw-r--r-- | drivers/hwmon/pc87427.c | 1352 |
1 files changed, 1352 insertions, 0 deletions
diff --git a/drivers/hwmon/pc87427.c b/drivers/hwmon/pc87427.c new file mode 100644 index 000000000..cb9fdd37b --- /dev/null +++ b/drivers/hwmon/pc87427.c @@ -0,0 +1,1352 @@ +/* + * pc87427.c - hardware monitoring driver for the + * National Semiconductor PC87427 Super-I/O chip + * Copyright (C) 2006, 2008, 2010 Jean Delvare <jdelvare@suse.de> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * 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. + * + * Supports the following chips: + * + * Chip #vin #fan #pwm #temp devid + * PC87427 - 8 4 6 0xF2 + * + * This driver assumes that no more than one chip is present. + * Only fans are fully supported so far. Temperatures are in read-only + * mode, and voltages aren't supported at all. + */ + +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt + +#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 <linux/sysfs.h> +#include <linux/ioport.h> +#include <linux/acpi.h> +#include <linux/io.h> + +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 DRVNAME "pc87427" + +/* + * The lock mutex protects both the I/O accesses (needed because the + * device is using banked registers) and the register cache (needed to keep + * the data in the registers and the cache in sync at any time). + */ +struct pc87427_data { + struct device *hwmon_dev; + struct mutex lock; + int address[2]; + const char *name; + + unsigned long last_updated; /* in jiffies */ + u8 fan_enabled; /* bit vector */ + u16 fan[8]; /* register values */ + u16 fan_min[8]; /* register values */ + u8 fan_status[8]; /* register values */ + + u8 pwm_enabled; /* bit vector */ + u8 pwm_auto_ok; /* bit vector */ + u8 pwm_enable[4]; /* register values */ + u8 pwm[4]; /* register values */ + + u8 temp_enabled; /* bit vector */ + s16 temp[6]; /* register values */ + s8 temp_min[6]; /* register values */ + s8 temp_max[6]; /* register values */ + s8 temp_crit[6]; /* register values */ + u8 temp_status[6]; /* register values */ + u8 temp_type[6]; /* register values */ +}; + +struct pc87427_sio_data { + unsigned short address[2]; + u8 has_fanin; + u8 has_fanout; +}; + +/* + * Super-I/O registers and operations + */ + +#define SIOREG_LDSEL 0x07 /* Logical device select */ +#define SIOREG_DEVID 0x20 /* Device ID */ +#define SIOREG_CF2 0x22 /* Configuration 2 */ +#define SIOREG_CF3 0x23 /* Configuration 3 */ +#define SIOREG_CF4 0x24 /* Configuration 4 */ +#define SIOREG_CF5 0x25 /* Configuration 5 */ +#define SIOREG_CFB 0x2B /* Configuration B */ +#define SIOREG_CFC 0x2C /* Configuration C */ +#define SIOREG_CFD 0x2D /* Configuration D */ +#define SIOREG_ACT 0x30 /* Device activation */ +#define SIOREG_MAP 0x50 /* I/O or memory mapping */ +#define SIOREG_IOBASE 0x60 /* I/O base address */ + +static const u8 logdev[2] = { 0x09, 0x14 }; +static const char *logdev_str[2] = { DRVNAME " FMC", DRVNAME " HMC" }; +#define LD_FAN 0 +#define LD_IN 1 +#define LD_TEMP 1 + +static inline void superio_outb(int sioaddr, int reg, int val) +{ + outb(reg, sioaddr); + outb(val, sioaddr + 1); +} + +static inline int superio_inb(int sioaddr, int reg) +{ + outb(reg, sioaddr); + return inb(sioaddr + 1); +} + +static inline void superio_exit(int sioaddr) +{ + outb(0x02, sioaddr); + outb(0x02, sioaddr + 1); +} + +/* + * Logical devices + */ + +#define REGION_LENGTH 32 +#define PC87427_REG_BANK 0x0f +#define BANK_FM(nr) (nr) +#define BANK_FT(nr) (0x08 + (nr)) +#define BANK_FC(nr) (0x10 + (nr) * 2) +#define BANK_TM(nr) (nr) +#define BANK_VM(nr) (0x08 + (nr)) + +/* + * I/O access functions + */ + +/* ldi is the logical device index */ +static inline int pc87427_read8(struct pc87427_data *data, u8 ldi, u8 reg) +{ + return inb(data->address[ldi] + reg); +} + +/* Must be called with data->lock held, except during init */ +static inline int pc87427_read8_bank(struct pc87427_data *data, u8 ldi, + u8 bank, u8 reg) +{ + outb(bank, data->address[ldi] + PC87427_REG_BANK); + return inb(data->address[ldi] + reg); +} + +/* Must be called with data->lock held, except during init */ +static inline void pc87427_write8_bank(struct pc87427_data *data, u8 ldi, + u8 bank, u8 reg, u8 value) +{ + outb(bank, data->address[ldi] + PC87427_REG_BANK); + outb(value, data->address[ldi] + reg); +} + +/* + * Fan registers and conversions + */ + +/* fan data registers are 16-bit wide */ +#define PC87427_REG_FAN 0x12 +#define PC87427_REG_FAN_MIN 0x14 +#define PC87427_REG_FAN_STATUS 0x10 + +#define FAN_STATUS_STALL (1 << 3) +#define FAN_STATUS_LOSPD (1 << 1) +#define FAN_STATUS_MONEN (1 << 0) + +/* + * Dedicated function to read all registers related to a given fan input. + * This saves us quite a few locks and bank selections. + * Must be called with data->lock held. + * nr is from 0 to 7 + */ +static void pc87427_readall_fan(struct pc87427_data *data, u8 nr) +{ + int iobase = data->address[LD_FAN]; + + outb(BANK_FM(nr), iobase + PC87427_REG_BANK); + data->fan[nr] = inw(iobase + PC87427_REG_FAN); + data->fan_min[nr] = inw(iobase + PC87427_REG_FAN_MIN); + data->fan_status[nr] = inb(iobase + PC87427_REG_FAN_STATUS); + /* Clear fan alarm bits */ + outb(data->fan_status[nr], iobase + PC87427_REG_FAN_STATUS); +} + +/* + * The 2 LSB of fan speed registers are used for something different. + * The actual 2 LSB of the measurements are not available. + */ +static inline unsigned long fan_from_reg(u16 reg) +{ + reg &= 0xfffc; + if (reg == 0x0000 || reg == 0xfffc) + return 0; + return 5400000UL / reg; +} + +/* The 2 LSB of the fan speed limit registers are not significant. */ +static inline u16 fan_to_reg(unsigned long val) +{ + if (val < 83UL) + return 0xffff; + if (val >= 1350000UL) + return 0x0004; + return ((1350000UL + val / 2) / val) << 2; +} + +/* + * PWM registers and conversions + */ + +#define PC87427_REG_PWM_ENABLE 0x10 +#define PC87427_REG_PWM_DUTY 0x12 + +#define PWM_ENABLE_MODE_MASK (7 << 4) +#define PWM_ENABLE_CTLEN (1 << 0) + +#define PWM_MODE_MANUAL (0 << 4) +#define PWM_MODE_AUTO (1 << 4) +#define PWM_MODE_OFF (2 << 4) +#define PWM_MODE_ON (7 << 4) + +/* + * Dedicated function to read all registers related to a given PWM output. + * This saves us quite a few locks and bank selections. + * Must be called with data->lock held. + * nr is from 0 to 3 + */ +static void pc87427_readall_pwm(struct pc87427_data *data, u8 nr) +{ + int iobase = data->address[LD_FAN]; + + outb(BANK_FC(nr), iobase + PC87427_REG_BANK); + data->pwm_enable[nr] = inb(iobase + PC87427_REG_PWM_ENABLE); + data->pwm[nr] = inb(iobase + PC87427_REG_PWM_DUTY); +} + +static inline int pwm_enable_from_reg(u8 reg) +{ + switch (reg & PWM_ENABLE_MODE_MASK) { + case PWM_MODE_ON: + return 0; + case PWM_MODE_MANUAL: + case PWM_MODE_OFF: + return 1; + case PWM_MODE_AUTO: + return 2; + default: + return -EPROTO; + } +} + +static inline u8 pwm_enable_to_reg(unsigned long val, u8 pwmval) +{ + switch (val) { + default: + return PWM_MODE_ON; + case 1: + return pwmval ? PWM_MODE_MANUAL : PWM_MODE_OFF; + case 2: + return PWM_MODE_AUTO; + } +} + +/* + * Temperature registers and conversions + */ + +#define PC87427_REG_TEMP_STATUS 0x10 +#define PC87427_REG_TEMP 0x14 +#define PC87427_REG_TEMP_MAX 0x18 +#define PC87427_REG_TEMP_MIN 0x19 +#define PC87427_REG_TEMP_CRIT 0x1a +#define PC87427_REG_TEMP_TYPE 0x1d + +#define TEMP_STATUS_CHANEN (1 << 0) +#define TEMP_STATUS_LOWFLG (1 << 1) +#define TEMP_STATUS_HIGHFLG (1 << 2) +#define TEMP_STATUS_CRITFLG (1 << 3) +#define TEMP_STATUS_SENSERR (1 << 5) +#define TEMP_TYPE_MASK (3 << 5) + +#define TEMP_TYPE_THERMISTOR (1 << 5) +#define TEMP_TYPE_REMOTE_DIODE (2 << 5) +#define TEMP_TYPE_LOCAL_DIODE (3 << 5) + +/* + * Dedicated function to read all registers related to a given temperature + * input. This saves us quite a few locks and bank selections. + * Must be called with data->lock held. + * nr is from 0 to 5 + */ +static void pc87427_readall_temp(struct pc87427_data *data, u8 nr) +{ + int iobase = data->address[LD_TEMP]; + + outb(BANK_TM(nr), iobase + PC87427_REG_BANK); + data->temp[nr] = le16_to_cpu(inw(iobase + PC87427_REG_TEMP)); + data->temp_max[nr] = inb(iobase + PC87427_REG_TEMP_MAX); + data->temp_min[nr] = inb(iobase + PC87427_REG_TEMP_MIN); + data->temp_crit[nr] = inb(iobase + PC87427_REG_TEMP_CRIT); + data->temp_type[nr] = inb(iobase + PC87427_REG_TEMP_TYPE); + data->temp_status[nr] = inb(iobase + PC87427_REG_TEMP_STATUS); + /* Clear fan alarm bits */ + outb(data->temp_status[nr], iobase + PC87427_REG_TEMP_STATUS); +} + +static inline unsigned int temp_type_from_reg(u8 reg) +{ + switch (reg & TEMP_TYPE_MASK) { + case TEMP_TYPE_THERMISTOR: + return 4; + case TEMP_TYPE_REMOTE_DIODE: + case TEMP_TYPE_LOCAL_DIODE: + return 3; + default: + return 0; + } +} + +/* + * We assume 8-bit thermal sensors; 9-bit thermal sensors are possible + * too, but I have no idea how to figure out when they are used. + */ +static inline long temp_from_reg(s16 reg) +{ + return reg * 1000 / 256; +} + +static inline long temp_from_reg8(s8 reg) +{ + return reg * 1000; +} + +/* + * Data interface + */ + +static struct pc87427_data *pc87427_update_device(struct device *dev) +{ + struct pc87427_data *data = dev_get_drvdata(dev); + int i; + + mutex_lock(&data->lock); + if (!time_after(jiffies, data->last_updated + HZ) + && data->last_updated) + goto done; + + /* Fans */ + for (i = 0; i < 8; i++) { + if (!(data->fan_enabled & (1 << i))) + continue; + pc87427_readall_fan(data, i); + } + + /* PWM outputs */ + for (i = 0; i < 4; i++) { + if (!(data->pwm_enabled & (1 << i))) + continue; + pc87427_readall_pwm(data, i); + } + + /* Temperature channels */ + for (i = 0; i < 6; i++) { + if (!(data->temp_enabled & (1 << i))) + continue; + pc87427_readall_temp(data, i); + } + + data->last_updated = jiffies; + +done: + mutex_unlock(&data->lock); + return data; +} + +static ssize_t show_fan_input(struct device *dev, struct device_attribute + *devattr, char *buf) +{ + struct pc87427_data *data = pc87427_update_device(dev); + int nr = to_sensor_dev_attr(devattr)->index; + + return sprintf(buf, "%lu\n", fan_from_reg(data->fan[nr])); +} + +static ssize_t show_fan_min(struct device *dev, struct device_attribute + *devattr, char *buf) +{ + struct pc87427_data *data = pc87427_update_device(dev); + int nr = to_sensor_dev_attr(devattr)->index; + + return sprintf(buf, "%lu\n", fan_from_reg(data->fan_min[nr])); +} + +static ssize_t show_fan_alarm(struct device *dev, struct device_attribute + *devattr, char *buf) +{ + struct pc87427_data *data = pc87427_update_device(dev); + int nr = to_sensor_dev_attr(devattr)->index; + + return sprintf(buf, "%d\n", !!(data->fan_status[nr] + & FAN_STATUS_LOSPD)); +} + +static ssize_t show_fan_fault(struct device *dev, struct device_attribute + *devattr, char *buf) +{ + struct pc87427_data *data = pc87427_update_device(dev); + int nr = to_sensor_dev_attr(devattr)->index; + + return sprintf(buf, "%d\n", !!(data->fan_status[nr] + & FAN_STATUS_STALL)); +} + +static ssize_t set_fan_min(struct device *dev, struct device_attribute + *devattr, const char *buf, size_t count) +{ + struct pc87427_data *data = dev_get_drvdata(dev); + int nr = to_sensor_dev_attr(devattr)->index; + unsigned long val; + int iobase = data->address[LD_FAN]; + + if (kstrtoul(buf, 10, &val) < 0) + return -EINVAL; + + mutex_lock(&data->lock); + outb(BANK_FM(nr), iobase + PC87427_REG_BANK); + /* + * The low speed limit registers are read-only while monitoring + * is enabled, so we have to disable monitoring, then change the + * limit, and finally enable monitoring again. + */ + outb(0, iobase + PC87427_REG_FAN_STATUS); + data->fan_min[nr] = fan_to_reg(val); + outw(data->fan_min[nr], iobase + PC87427_REG_FAN_MIN); + outb(FAN_STATUS_MONEN, iobase + PC87427_REG_FAN_STATUS); + mutex_unlock(&data->lock); + + return count; +} + +static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan_input, NULL, 0); +static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, show_fan_input, NULL, 1); +static SENSOR_DEVICE_ATTR(fan3_input, S_IRUGO, show_fan_input, NULL, 2); +static SENSOR_DEVICE_ATTR(fan4_input, S_IRUGO, show_fan_input, NULL, 3); +static SENSOR_DEVICE_ATTR(fan5_input, S_IRUGO, show_fan_input, NULL, 4); +static SENSOR_DEVICE_ATTR(fan6_input, S_IRUGO, show_fan_input, NULL, 5); +static SENSOR_DEVICE_ATTR(fan7_input, S_IRUGO, show_fan_input, NULL, 6); +static SENSOR_DEVICE_ATTR(fan8_input, S_IRUGO, show_fan_input, NULL, 7); + +static SENSOR_DEVICE_ATTR(fan1_min, S_IWUSR | S_IRUGO, + show_fan_min, set_fan_min, 0); +static SENSOR_DEVICE_ATTR(fan2_min, S_IWUSR | S_IRUGO, + show_fan_min, set_fan_min, 1); +static SENSOR_DEVICE_ATTR(fan3_min, S_IWUSR | S_IRUGO, + show_fan_min, set_fan_min, 2); +static SENSOR_DEVICE_ATTR(fan4_min, S_IWUSR | S_IRUGO, + show_fan_min, set_fan_min, 3); +static SENSOR_DEVICE_ATTR(fan5_min, S_IWUSR | S_IRUGO, + show_fan_min, set_fan_min, 4); +static SENSOR_DEVICE_ATTR(fan6_min, S_IWUSR | S_IRUGO, + show_fan_min, set_fan_min, 5); +static SENSOR_DEVICE_ATTR(fan7_min, S_IWUSR | S_IRUGO, + show_fan_min, set_fan_min, 6); +static SENSOR_DEVICE_ATTR(fan8_min, S_IWUSR | S_IRUGO, + show_fan_min, set_fan_min, 7); + +static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_fan_alarm, NULL, 0); +static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_fan_alarm, NULL, 1); +static SENSOR_DEVICE_ATTR(fan3_alarm, S_IRUGO, show_fan_alarm, NULL, 2); +static SENSOR_DEVICE_ATTR(fan4_alarm, S_IRUGO, show_fan_alarm, NULL, 3); +static SENSOR_DEVICE_ATTR(fan5_alarm, S_IRUGO, show_fan_alarm, NULL, 4); +static SENSOR_DEVICE_ATTR(fan6_alarm, S_IRUGO, show_fan_alarm, NULL, 5); +static SENSOR_DEVICE_ATTR(fan7_alarm, S_IRUGO, show_fan_alarm, NULL, 6); +static SENSOR_DEVICE_ATTR(fan8_alarm, S_IRUGO, show_fan_alarm, NULL, 7); + +static SENSOR_DEVICE_ATTR(fan1_fault, S_IRUGO, show_fan_fault, NULL, 0); +static SENSOR_DEVICE_ATTR(fan2_fault, S_IRUGO, show_fan_fault, NULL, 1); +static SENSOR_DEVICE_ATTR(fan3_fault, S_IRUGO, show_fan_fault, NULL, 2); +static SENSOR_DEVICE_ATTR(fan4_fault, S_IRUGO, show_fan_fault, NULL, 3); +static SENSOR_DEVICE_ATTR(fan5_fault, S_IRUGO, show_fan_fault, NULL, 4); +static SENSOR_DEVICE_ATTR(fan6_fault, S_IRUGO, show_fan_fault, NULL, 5); +static SENSOR_DEVICE_ATTR(fan7_fault, S_IRUGO, show_fan_fault, NULL, 6); +static SENSOR_DEVICE_ATTR(fan8_fault, S_IRUGO, show_fan_fault, NULL, 7); + +static struct attribute *pc87427_attributes_fan[8][5] = { + { + &sensor_dev_attr_fan1_input.dev_attr.attr, + &sensor_dev_attr_fan1_min.dev_attr.attr, + &sensor_dev_attr_fan1_alarm.dev_attr.attr, + &sensor_dev_attr_fan1_fault.dev_attr.attr, + NULL + }, { + &sensor_dev_attr_fan2_input.dev_attr.attr, + &sensor_dev_attr_fan2_min.dev_attr.attr, + &sensor_dev_attr_fan2_alarm.dev_attr.attr, + &sensor_dev_attr_fan2_fault.dev_attr.attr, + NULL + }, { + &sensor_dev_attr_fan3_input.dev_attr.attr, + &sensor_dev_attr_fan3_min.dev_attr.attr, + &sensor_dev_attr_fan3_alarm.dev_attr.attr, + &sensor_dev_attr_fan3_fault.dev_attr.attr, + NULL + }, { + &sensor_dev_attr_fan4_input.dev_attr.attr, + &sensor_dev_attr_fan4_min.dev_attr.attr, + &sensor_dev_attr_fan4_alarm.dev_attr.attr, + &sensor_dev_attr_fan4_fault.dev_attr.attr, + NULL + }, { + &sensor_dev_attr_fan5_input.dev_attr.attr, + &sensor_dev_attr_fan5_min.dev_attr.attr, + &sensor_dev_attr_fan5_alarm.dev_attr.attr, + &sensor_dev_attr_fan5_fault.dev_attr.attr, + NULL + }, { + &sensor_dev_attr_fan6_input.dev_attr.attr, + &sensor_dev_attr_fan6_min.dev_attr.attr, + &sensor_dev_attr_fan6_alarm.dev_attr.attr, + &sensor_dev_attr_fan6_fault.dev_attr.attr, + NULL + }, { + &sensor_dev_attr_fan7_input.dev_attr.attr, + &sensor_dev_attr_fan7_min.dev_attr.attr, + &sensor_dev_attr_fan7_alarm.dev_attr.attr, + &sensor_dev_attr_fan7_fault.dev_attr.attr, + NULL + }, { + &sensor_dev_attr_fan8_input.dev_attr.attr, + &sensor_dev_attr_fan8_min.dev_attr.attr, + &sensor_dev_attr_fan8_alarm.dev_attr.attr, + &sensor_dev_attr_fan8_fault.dev_attr.attr, + NULL + } +}; + +static const struct attribute_group pc87427_group_fan[8] = { + { .attrs = pc87427_attributes_fan[0] }, + { .attrs = pc87427_attributes_fan[1] }, + { .attrs = pc87427_attributes_fan[2] }, + { .attrs = pc87427_attributes_fan[3] }, + { .attrs = pc87427_attributes_fan[4] }, + { .attrs = pc87427_attributes_fan[5] }, + { .attrs = pc87427_attributes_fan[6] }, + { .attrs = pc87427_attributes_fan[7] }, +}; + +/* + * Must be called with data->lock held and pc87427_readall_pwm() freshly + * called + */ +static void update_pwm_enable(struct pc87427_data *data, int nr, u8 mode) +{ + int iobase = data->address[LD_FAN]; + data->pwm_enable[nr] &= ~PWM_ENABLE_MODE_MASK; + data->pwm_enable[nr] |= mode; + outb(data->pwm_enable[nr], iobase + PC87427_REG_PWM_ENABLE); +} + +static ssize_t show_pwm_enable(struct device *dev, struct device_attribute + *devattr, char *buf) +{ + struct pc87427_data *data = pc87427_update_device(dev); + int nr = to_sensor_dev_attr(devattr)->index; + int pwm_enable; + + pwm_enable = pwm_enable_from_reg(data->pwm_enable[nr]); + if (pwm_enable < 0) + return pwm_enable; + return sprintf(buf, "%d\n", pwm_enable); +} + +static ssize_t set_pwm_enable(struct device *dev, struct device_attribute + *devattr, const char *buf, size_t count) +{ + struct pc87427_data *data = dev_get_drvdata(dev); + int nr = to_sensor_dev_attr(devattr)->index; + unsigned long val; + + if (kstrtoul(buf, 10, &val) < 0 || val > 2) + return -EINVAL; + /* Can't go to automatic mode if it isn't configured */ + if (val == 2 && !(data->pwm_auto_ok & (1 << nr))) + return -EINVAL; + + mutex_lock(&data->lock); + pc87427_readall_pwm(data, nr); + update_pwm_enable(data, nr, pwm_enable_to_reg(val, data->pwm[nr])); + mutex_unlock(&data->lock); + + return count; +} + +static ssize_t show_pwm(struct device *dev, struct device_attribute + *devattr, char *buf) +{ + struct pc87427_data *data = pc87427_update_device(dev); + int nr = to_sensor_dev_attr(devattr)->index; + + return sprintf(buf, "%d\n", (int)data->pwm[nr]); +} + +static ssize_t set_pwm(struct device *dev, struct device_attribute + *devattr, const char *buf, size_t count) +{ + struct pc87427_data *data = dev_get_drvdata(dev); + int nr = to_sensor_dev_attr(devattr)->index; + unsigned long val; + int iobase = data->address[LD_FAN]; + u8 mode; + + if (kstrtoul(buf, 10, &val) < 0 || val > 0xff) + return -EINVAL; + + mutex_lock(&data->lock); + pc87427_readall_pwm(data, nr); + mode = data->pwm_enable[nr] & PWM_ENABLE_MODE_MASK; + if (mode != PWM_MODE_MANUAL && mode != PWM_MODE_OFF) { + dev_notice(dev, + "Can't set PWM%d duty cycle while not in manual mode\n", + nr + 1); + mutex_unlock(&data->lock); + return -EPERM; + } + + /* We may have to change the mode */ + if (mode == PWM_MODE_MANUAL && val == 0) { + /* Transition from Manual to Off */ + update_pwm_enable(data, nr, PWM_MODE_OFF); + mode = PWM_MODE_OFF; + dev_dbg(dev, "Switching PWM%d from %s to %s\n", nr + 1, + "manual", "off"); + } else if (mode == PWM_MODE_OFF && val != 0) { + /* Transition from Off to Manual */ + update_pwm_enable(data, nr, PWM_MODE_MANUAL); + mode = PWM_MODE_MANUAL; + dev_dbg(dev, "Switching PWM%d from %s to %s\n", nr + 1, + "off", "manual"); + } + + data->pwm[nr] = val; + if (mode == PWM_MODE_MANUAL) + outb(val, iobase + PC87427_REG_PWM_DUTY); + mutex_unlock(&data->lock); + + return count; +} + +static SENSOR_DEVICE_ATTR(pwm1_enable, S_IWUSR | S_IRUGO, + show_pwm_enable, set_pwm_enable, 0); +static SENSOR_DEVICE_ATTR(pwm2_enable, S_IWUSR | S_IRUGO, + show_pwm_enable, set_pwm_enable, 1); +static SENSOR_DEVICE_ATTR(pwm3_enable, S_IWUSR | S_IRUGO, + show_pwm_enable, set_pwm_enable, 2); +static SENSOR_DEVICE_ATTR(pwm4_enable, S_IWUSR | S_IRUGO, + show_pwm_enable, set_pwm_enable, 3); + +static SENSOR_DEVICE_ATTR(pwm1, S_IWUSR | S_IRUGO, show_pwm, set_pwm, 0); +static SENSOR_DEVICE_ATTR(pwm2, S_IWUSR | S_IRUGO, show_pwm, set_pwm, 1); +static SENSOR_DEVICE_ATTR(pwm3, S_IWUSR | S_IRUGO, show_pwm, set_pwm, 2); +static SENSOR_DEVICE_ATTR(pwm4, S_IWUSR | S_IRUGO, show_pwm, set_pwm, 3); + +static struct attribute *pc87427_attributes_pwm[4][3] = { + { + &sensor_dev_attr_pwm1_enable.dev_attr.attr, + &sensor_dev_attr_pwm1.dev_attr.attr, + NULL + }, { + &sensor_dev_attr_pwm2_enable.dev_attr.attr, + &sensor_dev_attr_pwm2.dev_attr.attr, + NULL + }, { + &sensor_dev_attr_pwm3_enable.dev_attr.attr, + &sensor_dev_attr_pwm3.dev_attr.attr, + NULL + }, { + &sensor_dev_attr_pwm4_enable.dev_attr.attr, + &sensor_dev_attr_pwm4.dev_attr.attr, + NULL + } +}; + +static const struct attribute_group pc87427_group_pwm[4] = { + { .attrs = pc87427_attributes_pwm[0] }, + { .attrs = pc87427_attributes_pwm[1] }, + { .attrs = pc87427_attributes_pwm[2] }, + { .attrs = pc87427_attributes_pwm[3] }, +}; + +static ssize_t show_temp_input(struct device *dev, struct device_attribute + *devattr, char *buf) +{ + struct pc87427_data *data = pc87427_update_device(dev); + int nr = to_sensor_dev_attr(devattr)->index; + + return sprintf(buf, "%ld\n", temp_from_reg(data->temp[nr])); +} + +static ssize_t show_temp_min(struct device *dev, struct device_attribute + *devattr, char *buf) +{ + struct pc87427_data *data = pc87427_update_device(dev); + int nr = to_sensor_dev_attr(devattr)->index; + + return sprintf(buf, "%ld\n", temp_from_reg8(data->temp_min[nr])); +} + +static ssize_t show_temp_max(struct device *dev, struct device_attribute + *devattr, char *buf) +{ + struct pc87427_data *data = pc87427_update_device(dev); + int nr = to_sensor_dev_attr(devattr)->index; + + return sprintf(buf, "%ld\n", temp_from_reg8(data->temp_max[nr])); +} + +static ssize_t show_temp_crit(struct device *dev, struct device_attribute + *devattr, char *buf) +{ + struct pc87427_data *data = pc87427_update_device(dev); + int nr = to_sensor_dev_attr(devattr)->index; + + return sprintf(buf, "%ld\n", temp_from_reg8(data->temp_crit[nr])); +} + +static ssize_t show_temp_type(struct device *dev, struct device_attribute + *devattr, char *buf) +{ + struct pc87427_data *data = pc87427_update_device(dev); + int nr = to_sensor_dev_attr(devattr)->index; + + return sprintf(buf, "%u\n", temp_type_from_reg(data->temp_type[nr])); +} + +static ssize_t show_temp_min_alarm(struct device *dev, struct device_attribute + *devattr, char *buf) +{ + struct pc87427_data *data = pc87427_update_device(dev); + int nr = to_sensor_dev_attr(devattr)->index; + + return sprintf(buf, "%d\n", !!(data->temp_status[nr] + & TEMP_STATUS_LOWFLG)); +} + +static ssize_t show_temp_max_alarm(struct device *dev, struct device_attribute + *devattr, char *buf) +{ + struct pc87427_data *data = pc87427_update_device(dev); + int nr = to_sensor_dev_attr(devattr)->index; + + return sprintf(buf, "%d\n", !!(data->temp_status[nr] + & TEMP_STATUS_HIGHFLG)); +} + +static ssize_t show_temp_crit_alarm(struct device *dev, struct device_attribute + *devattr, char *buf) +{ + struct pc87427_data *data = pc87427_update_device(dev); + int nr = to_sensor_dev_attr(devattr)->index; + + return sprintf(buf, "%d\n", !!(data->temp_status[nr] + & TEMP_STATUS_CRITFLG)); +} + +static ssize_t show_temp_fault(struct device *dev, struct device_attribute + *devattr, char *buf) +{ + struct pc87427_data *data = pc87427_update_device(dev); + int nr = to_sensor_dev_attr(devattr)->index; + + return sprintf(buf, "%d\n", !!(data->temp_status[nr] + & TEMP_STATUS_SENSERR)); +} + +static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp_input, NULL, 0); +static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp_input, NULL, 1); +static SENSOR_DEVICE_ATTR(temp3_input, S_IRUGO, show_temp_input, NULL, 2); +static SENSOR_DEVICE_ATTR(temp4_input, S_IRUGO, show_temp_input, NULL, 3); +static SENSOR_DEVICE_ATTR(temp5_input, S_IRUGO, show_temp_input, NULL, 4); +static SENSOR_DEVICE_ATTR(temp6_input, S_IRUGO, show_temp_input, NULL, 5); + +static SENSOR_DEVICE_ATTR(temp1_min, S_IRUGO, show_temp_min, NULL, 0); +static SENSOR_DEVICE_ATTR(temp2_min, S_IRUGO, show_temp_min, NULL, 1); +static SENSOR_DEVICE_ATTR(temp3_min, S_IRUGO, show_temp_min, NULL, 2); +static SENSOR_DEVICE_ATTR(temp4_min, S_IRUGO, show_temp_min, NULL, 3); +static SENSOR_DEVICE_ATTR(temp5_min, S_IRUGO, show_temp_min, NULL, 4); +static SENSOR_DEVICE_ATTR(temp6_min, S_IRUGO, show_temp_min, NULL, 5); + +static SENSOR_DEVICE_ATTR(temp1_max, S_IRUGO, show_temp_max, NULL, 0); +static SENSOR_DEVICE_ATTR(temp2_max, S_IRUGO, show_temp_max, NULL, 1); +static SENSOR_DEVICE_ATTR(temp3_max, S_IRUGO, show_temp_max, NULL, 2); +static SENSOR_DEVICE_ATTR(temp4_max, S_IRUGO, show_temp_max, NULL, 3); +static SENSOR_DEVICE_ATTR(temp5_max, S_IRUGO, show_temp_max, NULL, 4); +static SENSOR_DEVICE_ATTR(temp6_max, S_IRUGO, show_temp_max, NULL, 5); + +static SENSOR_DEVICE_ATTR(temp1_crit, S_IRUGO, show_temp_crit, NULL, 0); +static SENSOR_DEVICE_ATTR(temp2_crit, S_IRUGO, show_temp_crit, NULL, 1); +static SENSOR_DEVICE_ATTR(temp3_crit, S_IRUGO, show_temp_crit, NULL, 2); +static SENSOR_DEVICE_ATTR(temp4_crit, S_IRUGO, show_temp_crit, NULL, 3); +static SENSOR_DEVICE_ATTR(temp5_crit, S_IRUGO, show_temp_crit, NULL, 4); +static SENSOR_DEVICE_ATTR(temp6_crit, S_IRUGO, show_temp_crit, NULL, 5); + +static SENSOR_DEVICE_ATTR(temp1_type, S_IRUGO, show_temp_type, NULL, 0); +static SENSOR_DEVICE_ATTR(temp2_type, S_IRUGO, show_temp_type, NULL, 1); +static SENSOR_DEVICE_ATTR(temp3_type, S_IRUGO, show_temp_type, NULL, 2); +static SENSOR_DEVICE_ATTR(temp4_type, S_IRUGO, show_temp_type, NULL, 3); +static SENSOR_DEVICE_ATTR(temp5_type, S_IRUGO, show_temp_type, NULL, 4); +static SENSOR_DEVICE_ATTR(temp6_type, S_IRUGO, show_temp_type, NULL, 5); + +static SENSOR_DEVICE_ATTR(temp1_min_alarm, S_IRUGO, + show_temp_min_alarm, NULL, 0); +static SENSOR_DEVICE_ATTR(temp2_min_alarm, S_IRUGO, + show_temp_min_alarm, NULL, 1); +static SENSOR_DEVICE_ATTR(temp3_min_alarm, S_IRUGO, + show_temp_min_alarm, NULL, 2); +static SENSOR_DEVICE_ATTR(temp4_min_alarm, S_IRUGO, + show_temp_min_alarm, NULL, 3); +static SENSOR_DEVICE_ATTR(temp5_min_alarm, S_IRUGO, + show_temp_min_alarm, NULL, 4); +static SENSOR_DEVICE_ATTR(temp6_min_alarm, S_IRUGO, + show_temp_min_alarm, NULL, 5); + +static SENSOR_DEVICE_ATTR(temp1_max_alarm, S_IRUGO, + show_temp_max_alarm, NULL, 0); +static SENSOR_DEVICE_ATTR(temp2_max_alarm, S_IRUGO, + show_temp_max_alarm, NULL, 1); +static SENSOR_DEVICE_ATTR(temp3_max_alarm, S_IRUGO, + show_temp_max_alarm, NULL, 2); +static SENSOR_DEVICE_ATTR(temp4_max_alarm, S_IRUGO, + show_temp_max_alarm, NULL, 3); +static SENSOR_DEVICE_ATTR(temp5_max_alarm, S_IRUGO, + show_temp_max_alarm, NULL, 4); +static SENSOR_DEVICE_ATTR(temp6_max_alarm, S_IRUGO, + show_temp_max_alarm, NULL, 5); + +static SENSOR_DEVICE_ATTR(temp1_crit_alarm, S_IRUGO, + show_temp_crit_alarm, NULL, 0); +static SENSOR_DEVICE_ATTR(temp2_crit_alarm, S_IRUGO, + show_temp_crit_alarm, NULL, 1); +static SENSOR_DEVICE_ATTR(temp3_crit_alarm, S_IRUGO, + show_temp_crit_alarm, NULL, 2); +static SENSOR_DEVICE_ATTR(temp4_crit_alarm, S_IRUGO, + show_temp_crit_alarm, NULL, 3); +static SENSOR_DEVICE_ATTR(temp5_crit_alarm, S_IRUGO, + show_temp_crit_alarm, NULL, 4); +static SENSOR_DEVICE_ATTR(temp6_crit_alarm, S_IRUGO, + show_temp_crit_alarm, NULL, 5); + +static SENSOR_DEVICE_ATTR(temp1_fault, S_IRUGO, show_temp_fault, NULL, 0); +static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_temp_fault, NULL, 1); +static SENSOR_DEVICE_ATTR(temp3_fault, S_IRUGO, show_temp_fault, NULL, 2); +static SENSOR_DEVICE_ATTR(temp4_fault, S_IRUGO, show_temp_fault, NULL, 3); +static SENSOR_DEVICE_ATTR(temp5_fault, S_IRUGO, show_temp_fault, NULL, 4); +static SENSOR_DEVICE_ATTR(temp6_fault, S_IRUGO, show_temp_fault, NULL, 5); + +static struct attribute *pc87427_attributes_temp[6][10] = { + { + &sensor_dev_attr_temp1_input.dev_attr.attr, + &sensor_dev_attr_temp1_min.dev_attr.attr, + &sensor_dev_attr_temp1_max.dev_attr.attr, + &sensor_dev_attr_temp1_crit.dev_attr.attr, + &sensor_dev_attr_temp1_type.dev_attr.attr, + &sensor_dev_attr_temp1_min_alarm.dev_attr.attr, + &sensor_dev_attr_temp1_max_alarm.dev_attr.attr, + &sensor_dev_attr_temp1_crit_alarm.dev_attr.attr, + &sensor_dev_attr_temp1_fault.dev_attr.attr, + NULL + }, { + &sensor_dev_attr_temp2_input.dev_attr.attr, + &sensor_dev_attr_temp2_min.dev_attr.attr, + &sensor_dev_attr_temp2_max.dev_attr.attr, + &sensor_dev_attr_temp2_crit.dev_attr.attr, + &sensor_dev_attr_temp2_type.dev_attr.attr, + &sensor_dev_attr_temp2_min_alarm.dev_attr.attr, + &sensor_dev_attr_temp2_max_alarm.dev_attr.attr, + &sensor_dev_attr_temp2_crit_alarm.dev_attr.attr, + &sensor_dev_attr_temp2_fault.dev_attr.attr, + NULL + }, { + &sensor_dev_attr_temp3_input.dev_attr.attr, + &sensor_dev_attr_temp3_min.dev_attr.attr, + &sensor_dev_attr_temp3_max.dev_attr.attr, + &sensor_dev_attr_temp3_crit.dev_attr.attr, + &sensor_dev_attr_temp3_type.dev_attr.attr, + &sensor_dev_attr_temp3_min_alarm.dev_attr.attr, + &sensor_dev_attr_temp3_max_alarm.dev_attr.attr, + &sensor_dev_attr_temp3_crit_alarm.dev_attr.attr, + &sensor_dev_attr_temp3_fault.dev_attr.attr, + NULL + }, { + &sensor_dev_attr_temp4_input.dev_attr.attr, + &sensor_dev_attr_temp4_min.dev_attr.attr, + &sensor_dev_attr_temp4_max.dev_attr.attr, + &sensor_dev_attr_temp4_crit.dev_attr.attr, + &sensor_dev_attr_temp4_type.dev_attr.attr, + &sensor_dev_attr_temp4_min_alarm.dev_attr.attr, + &sensor_dev_attr_temp4_max_alarm.dev_attr.attr, + &sensor_dev_attr_temp4_crit_alarm.dev_attr.attr, + &sensor_dev_attr_temp4_fault.dev_attr.attr, + NULL + }, { + &sensor_dev_attr_temp5_input.dev_attr.attr, + &sensor_dev_attr_temp5_min.dev_attr.attr, + &sensor_dev_attr_temp5_max.dev_attr.attr, + &sensor_dev_attr_temp5_crit.dev_attr.attr, + &sensor_dev_attr_temp5_type.dev_attr.attr, + &sensor_dev_attr_temp5_min_alarm.dev_attr.attr, + &sensor_dev_attr_temp5_max_alarm.dev_attr.attr, + &sensor_dev_attr_temp5_crit_alarm.dev_attr.attr, + &sensor_dev_attr_temp5_fault.dev_attr.attr, + NULL + }, { + &sensor_dev_attr_temp6_input.dev_attr.attr, + &sensor_dev_attr_temp6_min.dev_attr.attr, + &sensor_dev_attr_temp6_max.dev_attr.attr, + &sensor_dev_attr_temp6_crit.dev_attr.attr, + &sensor_dev_attr_temp6_type.dev_attr.attr, + &sensor_dev_attr_temp6_min_alarm.dev_attr.attr, + &sensor_dev_attr_temp6_max_alarm.dev_attr.attr, + &sensor_dev_attr_temp6_crit_alarm.dev_attr.attr, + &sensor_dev_attr_temp6_fault.dev_attr.attr, + NULL + } +}; + +static const struct attribute_group pc87427_group_temp[6] = { + { .attrs = pc87427_attributes_temp[0] }, + { .attrs = pc87427_attributes_temp[1] }, + { .attrs = pc87427_attributes_temp[2] }, + { .attrs = pc87427_attributes_temp[3] }, + { .attrs = pc87427_attributes_temp[4] }, + { .attrs = pc87427_attributes_temp[5] }, +}; + +static ssize_t show_name(struct device *dev, struct device_attribute + *devattr, char *buf) +{ + struct pc87427_data *data = dev_get_drvdata(dev); + + return sprintf(buf, "%s\n", data->name); +} +static DEVICE_ATTR(name, S_IRUGO, show_name, NULL); + + +/* + * Device detection, attach and detach + */ + +static int pc87427_request_regions(struct platform_device *pdev, + int count) +{ + struct resource *res; + int i; + + for (i = 0; i < count; i++) { + res = platform_get_resource(pdev, IORESOURCE_IO, i); + if (!res) { + dev_err(&pdev->dev, "Missing resource #%d\n", i); + return -ENOENT; + } + if (!devm_request_region(&pdev->dev, res->start, + resource_size(res), DRVNAME)) { + dev_err(&pdev->dev, + "Failed to request region 0x%lx-0x%lx\n", + (unsigned long)res->start, + (unsigned long)res->end); + return -EBUSY; + } + } + return 0; +} + +static void pc87427_init_device(struct device *dev) +{ + struct pc87427_sio_data *sio_data = dev_get_platdata(dev); + struct pc87427_data *data = dev_get_drvdata(dev); + int i; + u8 reg; + + /* The FMC module should be ready */ + reg = pc87427_read8(data, LD_FAN, PC87427_REG_BANK); + if (!(reg & 0x80)) + dev_warn(dev, "%s module not ready!\n", "FMC"); + + /* Check which fans are enabled */ + for (i = 0; i < 8; i++) { + if (!(sio_data->has_fanin & (1 << i))) /* Not wired */ + continue; + reg = pc87427_read8_bank(data, LD_FAN, BANK_FM(i), + PC87427_REG_FAN_STATUS); + if (reg & FAN_STATUS_MONEN) + data->fan_enabled |= (1 << i); + } + + if (!data->fan_enabled) { + dev_dbg(dev, "Enabling monitoring of all fans\n"); + for (i = 0; i < 8; i++) { + if (!(sio_data->has_fanin & (1 << i))) /* Not wired */ + continue; + pc87427_write8_bank(data, LD_FAN, BANK_FM(i), + PC87427_REG_FAN_STATUS, + FAN_STATUS_MONEN); + } + data->fan_enabled = sio_data->has_fanin; + } + + /* Check which PWM outputs are enabled */ + for (i = 0; i < 4; i++) { + if (!(sio_data->has_fanout & (1 << i))) /* Not wired */ + continue; + reg = pc87427_read8_bank(data, LD_FAN, BANK_FC(i), + PC87427_REG_PWM_ENABLE); + if (reg & PWM_ENABLE_CTLEN) + data->pwm_enabled |= (1 << i); + + /* + * We don't expose an interface to reconfigure the automatic + * fan control mode, so only allow to return to this mode if + * it was originally set. + */ + if ((reg & PWM_ENABLE_MODE_MASK) == PWM_MODE_AUTO) { + dev_dbg(dev, "PWM%d is in automatic control mode\n", + i + 1); + data->pwm_auto_ok |= (1 << i); + } + } + + /* The HMC module should be ready */ + reg = pc87427_read8(data, LD_TEMP, PC87427_REG_BANK); + if (!(reg & 0x80)) + dev_warn(dev, "%s module not ready!\n", "HMC"); + + /* Check which temperature channels are enabled */ + for (i = 0; i < 6; i++) { + reg = pc87427_read8_bank(data, LD_TEMP, BANK_TM(i), + PC87427_REG_TEMP_STATUS); + if (reg & TEMP_STATUS_CHANEN) + data->temp_enabled |= (1 << i); + } +} + +static void pc87427_remove_files(struct device *dev) +{ + struct pc87427_data *data = dev_get_drvdata(dev); + int i; + + device_remove_file(dev, &dev_attr_name); + for (i = 0; i < 8; i++) { + if (!(data->fan_enabled & (1 << i))) + continue; + sysfs_remove_group(&dev->kobj, &pc87427_group_fan[i]); + } + for (i = 0; i < 4; i++) { + if (!(data->pwm_enabled & (1 << i))) + continue; + sysfs_remove_group(&dev->kobj, &pc87427_group_pwm[i]); + } + for (i = 0; i < 6; i++) { + if (!(data->temp_enabled & (1 << i))) + continue; + sysfs_remove_group(&dev->kobj, &pc87427_group_temp[i]); + } +} + +static int pc87427_probe(struct platform_device *pdev) +{ + struct pc87427_sio_data *sio_data = dev_get_platdata(&pdev->dev); + struct pc87427_data *data; + int i, err, res_count; + + data = devm_kzalloc(&pdev->dev, sizeof(struct pc87427_data), + GFP_KERNEL); + if (!data) + return -ENOMEM; + + data->address[0] = sio_data->address[0]; + data->address[1] = sio_data->address[1]; + res_count = (data->address[0] != 0) + (data->address[1] != 0); + + err = pc87427_request_regions(pdev, res_count); + if (err) + return err; + + mutex_init(&data->lock); + data->name = "pc87427"; + platform_set_drvdata(pdev, data); + pc87427_init_device(&pdev->dev); + + /* Register sysfs hooks */ + err = device_create_file(&pdev->dev, &dev_attr_name); + if (err) + return err; + for (i = 0; i < 8; i++) { + if (!(data->fan_enabled & (1 << i))) + continue; + err = sysfs_create_group(&pdev->dev.kobj, + &pc87427_group_fan[i]); + if (err) + goto exit_remove_files; + } + for (i = 0; i < 4; i++) { + if (!(data->pwm_enabled & (1 << i))) + continue; + err = sysfs_create_group(&pdev->dev.kobj, + &pc87427_group_pwm[i]); + if (err) + goto exit_remove_files; + } + for (i = 0; i < 6; i++) { + if (!(data->temp_enabled & (1 << i))) + continue; + err = sysfs_create_group(&pdev->dev.kobj, + &pc87427_group_temp[i]); + if (err) + goto exit_remove_files; + } + + data->hwmon_dev = hwmon_device_register(&pdev->dev); + if (IS_ERR(data->hwmon_dev)) { + err = PTR_ERR(data->hwmon_dev); + dev_err(&pdev->dev, "Class registration failed (%d)\n", err); + goto exit_remove_files; + } + + return 0; + +exit_remove_files: + pc87427_remove_files(&pdev->dev); + return err; +} + +static int pc87427_remove(struct platform_device *pdev) +{ + struct pc87427_data *data = platform_get_drvdata(pdev); + + hwmon_device_unregister(data->hwmon_dev); + pc87427_remove_files(&pdev->dev); + + return 0; +} + + +static struct platform_driver pc87427_driver = { + .driver = { + .name = DRVNAME, + }, + .probe = pc87427_probe, + .remove = pc87427_remove, +}; + +static int __init pc87427_device_add(const struct pc87427_sio_data *sio_data) +{ + struct resource res[2] = { + { .flags = IORESOURCE_IO }, + { .flags = IORESOURCE_IO }, + }; + int err, i, res_count; + + res_count = 0; + for (i = 0; i < 2; i++) { + if (!sio_data->address[i]) + continue; + res[res_count].start = sio_data->address[i]; + res[res_count].end = sio_data->address[i] + REGION_LENGTH - 1; + res[res_count].name = logdev_str[i]; + + err = acpi_check_resource_conflict(&res[res_count]); + if (err) + goto exit; + + res_count++; + } + + pdev = platform_device_alloc(DRVNAME, res[0].start); + if (!pdev) { + err = -ENOMEM; + pr_err("Device allocation failed\n"); + goto exit; + } + + err = platform_device_add_resources(pdev, res, res_count); + if (err) { + pr_err("Device resource addition failed (%d)\n", err); + goto exit_device_put; + } + + err = platform_device_add_data(pdev, sio_data, + sizeof(struct pc87427_sio_data)); + if (err) { + pr_err("Platform data allocation failed\n"); + goto exit_device_put; + } + + err = platform_device_add(pdev); + if (err) { + pr_err("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 pc87427_find(int sioaddr, struct pc87427_sio_data *sio_data) +{ + u16 val; + u8 cfg, cfg_b; + int i, err = 0; + + /* Identify device */ + val = force_id ? force_id : superio_inb(sioaddr, SIOREG_DEVID); + if (val != 0xf2) { /* PC87427 */ + err = -ENODEV; + goto exit; + } + + for (i = 0; i < 2; i++) { + sio_data->address[i] = 0; + /* Select logical device */ + superio_outb(sioaddr, SIOREG_LDSEL, logdev[i]); + + val = superio_inb(sioaddr, SIOREG_ACT); + if (!(val & 0x01)) { + pr_info("Logical device 0x%02x not activated\n", + logdev[i]); + continue; + } + + val = superio_inb(sioaddr, SIOREG_MAP); + if (val & 0x01) { + pr_warn("Logical device 0x%02x is memory-mapped, can't use\n", + logdev[i]); + continue; + } + + val = (superio_inb(sioaddr, SIOREG_IOBASE) << 8) + | superio_inb(sioaddr, SIOREG_IOBASE + 1); + if (!val) { + pr_info("I/O base address not set for logical device 0x%02x\n", + logdev[i]); + continue; + } + sio_data->address[i] = val; + } + + /* No point in loading the driver if everything is disabled */ + if (!sio_data->address[0] && !sio_data->address[1]) { + err = -ENODEV; + goto exit; + } + + /* Check which fan inputs are wired */ + sio_data->has_fanin = (1 << 2) | (1 << 3); /* FANIN2, FANIN3 */ + + cfg = superio_inb(sioaddr, SIOREG_CF2); + if (!(cfg & (1 << 3))) + sio_data->has_fanin |= (1 << 0); /* FANIN0 */ + if (!(cfg & (1 << 2))) + sio_data->has_fanin |= (1 << 4); /* FANIN4 */ + + cfg = superio_inb(sioaddr, SIOREG_CFD); + if (!(cfg & (1 << 0))) + sio_data->has_fanin |= (1 << 1); /* FANIN1 */ + + cfg = superio_inb(sioaddr, SIOREG_CF4); + if (!(cfg & (1 << 0))) + sio_data->has_fanin |= (1 << 7); /* FANIN7 */ + cfg_b = superio_inb(sioaddr, SIOREG_CFB); + if (!(cfg & (1 << 1)) && (cfg_b & (1 << 3))) + sio_data->has_fanin |= (1 << 5); /* FANIN5 */ + cfg = superio_inb(sioaddr, SIOREG_CF3); + if ((cfg & (1 << 3)) && !(cfg_b & (1 << 5))) + sio_data->has_fanin |= (1 << 6); /* FANIN6 */ + + /* Check which fan outputs are wired */ + sio_data->has_fanout = (1 << 0); /* FANOUT0 */ + if (cfg_b & (1 << 0)) + sio_data->has_fanout |= (1 << 3); /* FANOUT3 */ + + cfg = superio_inb(sioaddr, SIOREG_CFC); + if (!(cfg & (1 << 4))) { + if (cfg_b & (1 << 1)) + sio_data->has_fanout |= (1 << 1); /* FANOUT1 */ + if (cfg_b & (1 << 2)) + sio_data->has_fanout |= (1 << 2); /* FANOUT2 */ + } + + /* FANOUT1 and FANOUT2 can each be routed to 2 different pins */ + cfg = superio_inb(sioaddr, SIOREG_CF5); + if (cfg & (1 << 6)) + sio_data->has_fanout |= (1 << 1); /* FANOUT1 */ + if (cfg & (1 << 5)) + sio_data->has_fanout |= (1 << 2); /* FANOUT2 */ + +exit: + superio_exit(sioaddr); + return err; +} + +static int __init pc87427_init(void) +{ + int err; + struct pc87427_sio_data sio_data; + + if (pc87427_find(0x2e, &sio_data) + && pc87427_find(0x4e, &sio_data)) + return -ENODEV; + + err = platform_driver_register(&pc87427_driver); + if (err) + goto exit; + + /* Sets global pdev as a side effect */ + err = pc87427_device_add(&sio_data); + if (err) + goto exit_driver; + + return 0; + +exit_driver: + platform_driver_unregister(&pc87427_driver); +exit: + return err; +} + +static void __exit pc87427_exit(void) +{ + platform_device_unregister(pdev); + platform_driver_unregister(&pc87427_driver); +} + +MODULE_AUTHOR("Jean Delvare <jdelvare@suse.de>"); +MODULE_DESCRIPTION("PC87427 hardware monitoring driver"); +MODULE_LICENSE("GPL"); + +module_init(pc87427_init); +module_exit(pc87427_exit); |