hwmon: Only call vid_which_vrm() when needed

[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / hwmon / w83627hf.c

/*
    w83627hf.c - Part of lm_sensors, Linux kernel modules for hardware
                monitoring
    Copyright (c) 1998 - 2003  Frodo Looijaard <frodol@dds.nl>,
    Philip Edelbrock <phil@netroedge.com>,
    and Mark Studebaker <mdsxyz123@yahoo.com>
    Ported to 2.6 by Bernhard C. Schrenk <clemy@clemy.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.
*/

/*
    Supports following chips:

    Chip        #vin    #fanin  #pwm    #temp   wchipid vendid  i2c     ISA
    w83627hf    9       3       2       3       0x20    0x5ca3  no      yes(LPC)
    w83627thf   7       3       3       3       0x90    0x5ca3  no      yes(LPC)
    w83637hf    7       3       3       3       0x80    0x5ca3  no      yes(LPC)
    w83687thf   7       3       3       3       0x90    0x5ca3  no      yes(LPC)
    w83697hf    8       2       2       2       0x60    0x5ca3  no      yes(LPC)

    For other winbond chips, and for i2c support in the above chips,
    use w83781d.c.

    Note: automatic ("cruise") fan control for 697, 637 & 627thf not
    supported yet.
*/

#include <linux/module.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/jiffies.h>
#include <linux/i2c.h>
#include <linux/i2c-isa.h>
#include <linux/hwmon.h>
#include <linux/hwmon-vid.h>
#include <linux/err.h>
#include <linux/mutex.h>
#include <asm/io.h>
#include "lm75.h"

static u16 force_addr;
module_param(force_addr, ushort, 0);
MODULE_PARM_DESC(force_addr,
                 "Initialize the base address of the sensors");
static u8 force_i2c = 0x1f;
module_param(force_i2c, byte, 0);
MODULE_PARM_DESC(force_i2c,
                 "Initialize the i2c address of the sensors");

/* The actual ISA address is read from Super-I/O configuration space */
static unsigned short address;

/* Insmod parameters */
enum chips { any_chip, w83627hf, w83627thf, w83697hf, w83637hf, w83687thf };

static int reset;
module_param(reset, bool, 0);
MODULE_PARM_DESC(reset, "Set to one to reset chip on load");

static int init = 1;
module_param(init, bool, 0);
MODULE_PARM_DESC(init, "Set to zero to bypass chip initialization");

/* modified from kernel/include/traps.c */
static int REG;         /* The register to read/write */
#define DEV     0x07    /* Register: Logical device select */
static int VAL;         /* The value to read/write */

/* logical device numbers for superio_select (below) */
#define W83627HF_LD_FDC         0x00
#define W83627HF_LD_PRT         0x01
#define W83627HF_LD_UART1       0x02
#define W83627HF_LD_UART2       0x03
#define W83627HF_LD_KBC         0x05
#define W83627HF_LD_CIR         0x06 /* w83627hf only */
#define W83627HF_LD_GAME        0x07
#define W83627HF_LD_MIDI        0x07
#define W83627HF_LD_GPIO1       0x07
#define W83627HF_LD_GPIO5       0x07 /* w83627thf only */
#define W83627HF_LD_GPIO2       0x08
#define W83627HF_LD_GPIO3       0x09
#define W83627HF_LD_GPIO4       0x09 /* w83627thf only */
#define W83627HF_LD_ACPI        0x0a
#define W83627HF_LD_HWM         0x0b

#define DEVID   0x20    /* Register: Device ID */

#define W83627THF_GPIO5_EN      0x30 /* w83627thf only */
#define W83627THF_GPIO5_IOSR    0xf3 /* w83627thf only */
#define W83627THF_GPIO5_DR      0xf4 /* w83627thf only */

#define W83687THF_VID_EN        0x29 /* w83687thf only */
#define W83687THF_VID_CFG       0xF0 /* w83687thf only */
#define W83687THF_VID_DATA      0xF1 /* w83687thf only */

static inline void
superio_outb(int reg, int val)
{
        outb(reg, REG);
        outb(val, VAL);
}

static inline int
superio_inb(int reg)
{
        outb(reg, REG);
        return inb(VAL);
}

static inline void
superio_select(int ld)
{
        outb(DEV, REG);
        outb(ld, VAL);
}

static inline void
superio_enter(void)
{
        outb(0x87, REG);
        outb(0x87, REG);
}

static inline void
superio_exit(void)
{
        outb(0xAA, REG);
}

#define W627_DEVID 0x52
#define W627THF_DEVID 0x82
#define W697_DEVID 0x60
#define W637_DEVID 0x70
#define W687THF_DEVID 0x85
#define WINB_ACT_REG 0x30
#define WINB_BASE_REG 0x60
/* Constants specified below */

/* Alignment of the base address */
#define WINB_ALIGNMENT          ~7

/* Offset & size of I/O region we are interested in */
#define WINB_REGION_OFFSET      5
#define WINB_REGION_SIZE        2

/* Where are the sensors address/data registers relative to the base address */
#define W83781D_ADDR_REG_OFFSET 5
#define W83781D_DATA_REG_OFFSET 6

/* The W83781D registers */
/* The W83782D registers for nr=7,8 are in bank 5 */
#define W83781D_REG_IN_MAX(nr) ((nr < 7) ? (0x2b + (nr) * 2) : \
                                           (0x554 + (((nr) - 7) * 2)))
#define W83781D_REG_IN_MIN(nr) ((nr < 7) ? (0x2c + (nr) * 2) : \
                                           (0x555 + (((nr) - 7) * 2)))
#define W83781D_REG_IN(nr)     ((nr < 7) ? (0x20 + (nr)) : \
                                           (0x550 + (nr) - 7))

#define W83781D_REG_FAN_MIN(nr) (0x3a + (nr))
#define W83781D_REG_FAN(nr) (0x27 + (nr))

#define W83781D_REG_TEMP2_CONFIG 0x152
#define W83781D_REG_TEMP3_CONFIG 0x252
#define W83781D_REG_TEMP(nr)            ((nr == 3) ? (0x0250) : \
                                        ((nr == 2) ? (0x0150) : \
                                                     (0x27)))
#define W83781D_REG_TEMP_HYST(nr)       ((nr == 3) ? (0x253) : \
                                        ((nr == 2) ? (0x153) : \
                                                     (0x3A)))
#define W83781D_REG_TEMP_OVER(nr)       ((nr == 3) ? (0x255) : \
                                        ((nr == 2) ? (0x155) : \
                                                     (0x39)))

#define W83781D_REG_BANK 0x4E

#define W83781D_REG_CONFIG 0x40
#define W83781D_REG_ALARM1 0x459
#define W83781D_REG_ALARM2 0x45A
#define W83781D_REG_ALARM3 0x45B

#define W83781D_REG_BEEP_CONFIG 0x4D
#define W83781D_REG_BEEP_INTS1 0x56
#define W83781D_REG_BEEP_INTS2 0x57
#define W83781D_REG_BEEP_INTS3 0x453

#define W83781D_REG_VID_FANDIV 0x47

#define W83781D_REG_CHIPID 0x49
#define W83781D_REG_WCHIPID 0x58
#define W83781D_REG_CHIPMAN 0x4F
#define W83781D_REG_PIN 0x4B

#define W83781D_REG_VBAT 0x5D

#define W83627HF_REG_PWM1 0x5A
#define W83627HF_REG_PWM2 0x5B

#define W83627THF_REG_PWM1              0x01    /* 697HF/637HF/687THF too */
#define W83627THF_REG_PWM2              0x03    /* 697HF/637HF/687THF too */
#define W83627THF_REG_PWM3              0x11    /* 637HF/687THF too */

#define W83627THF_REG_VRM_OVT_CFG       0x18    /* 637HF/687THF too */

static const u8 regpwm_627hf[] = { W83627HF_REG_PWM1, W83627HF_REG_PWM2 };
static const u8 regpwm[] = { W83627THF_REG_PWM1, W83627THF_REG_PWM2,
                             W83627THF_REG_PWM3 };
#define W836X7HF_REG_PWM(type, nr) (((type) == w83627hf) ? \
                                     regpwm_627hf[(nr) - 1] : regpwm[(nr) - 1])

#define W83781D_REG_I2C_ADDR 0x48
#define W83781D_REG_I2C_SUBADDR 0x4A

/* Sensor selection */
#define W83781D_REG_SCFG1 0x5D
static const u8 BIT_SCFG1[] = { 0x02, 0x04, 0x08 };
#define W83781D_REG_SCFG2 0x59
static const u8 BIT_SCFG2[] = { 0x10, 0x20, 0x40 };
#define W83781D_DEFAULT_BETA 3435

/* Conversions. Limit checking is only done on the TO_REG
   variants. Note that you should be a bit careful with which arguments
   these macros are called: arguments may be evaluated more than once.
   Fixing this is just not worth it. */
#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);
}

#define TEMP_MIN (-128000)
#define TEMP_MAX ( 127000)

/* TEMP: 0.001C/bit (-128C to +127C)
   REG: 1C/bit, two's complement */
static u8 TEMP_TO_REG(int temp)
{
        int ntemp = SENSORS_LIMIT(temp, TEMP_MIN, TEMP_MAX);
        ntemp += (ntemp<0 ? -500 : 500);
        return (u8)(ntemp / 1000);
}

static int TEMP_FROM_REG(u8 reg)
{
        return (s8)reg * 1000;
}

#define FAN_FROM_REG(val,div) ((val)==0?-1:(val)==255?0:1350000/((val)*(div)))

#define PWM_TO_REG(val) (SENSORS_LIMIT((val),0,255))

#define BEEP_MASK_FROM_REG(val)          (val)
#define BEEP_MASK_TO_REG(val)           ((val) & 0xffffff)
#define BEEP_ENABLE_TO_REG(val)         ((val)?1:0)
#define BEEP_ENABLE_FROM_REG(val)       ((val)?1:0)

#define DIV_FROM_REG(val) (1 << (val))

static inline u8 DIV_TO_REG(long val)
{
        int i;
        val = SENSORS_LIMIT(val, 1, 128) >> 1;
        for (i = 0; i < 7; i++) {
                if (val == 0)
                        break;
                val >>= 1;
        }
        return ((u8) i);
}

/* For each registered chip, we need to keep some data in memory.
   The structure is dynamically allocated. */
struct w83627hf_data {
        struct i2c_client client;
        struct class_device *class_dev;
        struct mutex lock;
        enum chips type;

        struct mutex update_lock;
        char valid;             /* !=0 if following fields are valid */
        unsigned long last_updated;     /* In jiffies */

        struct i2c_client *lm75;        /* for secondary I2C addresses */
        /* pointer to array of 2 subclients */

        u8 in[9];               /* Register value */
        u8 in_max[9];           /* Register value */
        u8 in_min[9];           /* Register value */
        u8 fan[3];              /* Register value */
        u8 fan_min[3];          /* Register value */
        u8 temp;
        u8 temp_max;            /* Register value */
        u8 temp_max_hyst;       /* Register value */
        u16 temp_add[2];        /* Register value */
        u16 temp_max_add[2];    /* Register value */
        u16 temp_max_hyst_add[2]; /* Register value */
        u8 fan_div[3];          /* Register encoding, shifted right */
        u8 vid;                 /* Register encoding, combined */
        u32 alarms;             /* Register encoding, combined */
        u32 beep_mask;          /* Register encoding, combined */
        u8 beep_enable;         /* Boolean */
        u8 pwm[3];              /* Register value */
        u16 sens[3];            /* 782D/783S only.
                                   1 = pentium diode; 2 = 3904 diode;
                                   3000-5000 = thermistor beta.
                                   Default = 3435.
                                   Other Betas unimplemented */
        u8 vrm;
        u8 vrm_ovt;             /* Register value, 627THF/637HF/687THF only */
};


static int w83627hf_detect(struct i2c_adapter *adapter);
static int w83627hf_detach_client(struct i2c_client *client);

static int w83627hf_read_value(struct i2c_client *client, u16 reg);
static int w83627hf_write_value(struct i2c_client *client, u16 reg, u16 value);
static struct w83627hf_data *w83627hf_update_device(struct device *dev);
static void w83627hf_init_client(struct i2c_client *client);

static struct i2c_driver w83627hf_driver = {
        .driver = {
                .owner  = THIS_MODULE,
                .name   = "w83627hf",
        },
        .attach_adapter = w83627hf_detect,
        .detach_client  = w83627hf_detach_client,
};

/* following are the sysfs callback functions */
#define show_in_reg(reg) \
static ssize_t show_##reg (struct device *dev, char *buf, int nr) \
{ \
        struct w83627hf_data *data = w83627hf_update_device(dev); \
        return sprintf(buf,"%ld\n", (long)IN_FROM_REG(data->reg[nr])); \
}
show_in_reg(in)
show_in_reg(in_min)
show_in_reg(in_max)

#define store_in_reg(REG, reg) \
static ssize_t \
store_in_##reg (struct device *dev, const char *buf, size_t count, int nr) \
{ \
        struct i2c_client *client = to_i2c_client(dev); \
        struct w83627hf_data *data = i2c_get_clientdata(client); \
        u32 val; \
         \
        val = simple_strtoul(buf, NULL, 10); \
         \
        mutex_lock(&data->update_lock); \
        data->in_##reg[nr] = IN_TO_REG(val); \
        w83627hf_write_value(client, W83781D_REG_IN_##REG(nr), \
                            data->in_##reg[nr]); \
         \
        mutex_unlock(&data->update_lock); \
        return count; \
}
store_in_reg(MIN, min)
store_in_reg(MAX, max)

#define sysfs_in_offset(offset) \
static ssize_t \
show_regs_in_##offset (struct device *dev, struct device_attribute *attr, char *buf) \
{ \
        return show_in(dev, buf, offset); \
} \
static DEVICE_ATTR(in##offset##_input, S_IRUGO, show_regs_in_##offset, NULL);

#define sysfs_in_reg_offset(reg, offset) \
static ssize_t show_regs_in_##reg##offset (struct device *dev, struct device_attribute *attr, char *buf) \
{ \
        return show_in_##reg (dev, buf, offset); \
} \
static ssize_t \
store_regs_in_##reg##offset (struct device *dev, struct device_attribute *attr, \
                            const char *buf, size_t count) \
{ \
        return store_in_##reg (dev, buf, count, offset); \
} \
static DEVICE_ATTR(in##offset##_##reg, S_IRUGO| S_IWUSR, \
                  show_regs_in_##reg##offset, store_regs_in_##reg##offset);

#define sysfs_in_offsets(offset) \
sysfs_in_offset(offset) \
sysfs_in_reg_offset(min, offset) \
sysfs_in_reg_offset(max, offset)

sysfs_in_offsets(1);
sysfs_in_offsets(2);
sysfs_in_offsets(3);
sysfs_in_offsets(4);
sysfs_in_offsets(5);
sysfs_in_offsets(6);
sysfs_in_offsets(7);
sysfs_in_offsets(8);

/* use a different set of functions for in0 */
static ssize_t show_in_0(struct w83627hf_data *data, char *buf, u8 reg)
{
        long in0;

        if ((data->vrm_ovt & 0x01) &&
                (w83627thf == data->type || w83637hf == data->type
                 || w83687thf == data->type))

                /* use VRM9 calculation */
                in0 = (long)((reg * 488 + 70000 + 50) / 100);
        else
                /* use VRM8 (standard) calculation */
                in0 = (long)IN_FROM_REG(reg);

        return sprintf(buf,"%ld\n", in0);
}

static ssize_t show_regs_in_0(struct device *dev, struct device_attribute *attr, char *buf)
{
        struct w83627hf_data *data = w83627hf_update_device(dev);
        return show_in_0(data, buf, data->in[0]);
}

static ssize_t show_regs_in_min0(struct device *dev, struct device_attribute *attr, char *buf)
{
        struct w83627hf_data *data = w83627hf_update_device(dev);
        return show_in_0(data, buf, data->in_min[0]);
}

static ssize_t show_regs_in_max0(struct device *dev, struct device_attribute *attr, char *buf)
{
        struct w83627hf_data *data = w83627hf_update_device(dev);
        return show_in_0(data, buf, data->in_max[0]);
}

static ssize_t store_regs_in_min0(struct device *dev, struct device_attribute *attr,
        const char *buf, size_t count)
{
        struct i2c_client *client = to_i2c_client(dev);
        struct w83627hf_data *data = i2c_get_clientdata(client);
        u32 val;

        val = simple_strtoul(buf, NULL, 10);

        mutex_lock(&data->update_lock);
        
        if ((data->vrm_ovt & 0x01) &&
                (w83627thf == data->type || w83637hf == data->type
                 || w83687thf == data->type))

                /* use VRM9 calculation */
                data->in_min[0] =
                        SENSORS_LIMIT(((val * 100) - 70000 + 244) / 488, 0,
                                        255);
        else
                /* use VRM8 (standard) calculation */
                data->in_min[0] = IN_TO_REG(val);

        w83627hf_write_value(client, W83781D_REG_IN_MIN(0), data->in_min[0]);
        mutex_unlock(&data->update_lock);
        return count;
}

static ssize_t store_regs_in_max0(struct device *dev, struct device_attribute *attr,
        const char *buf, size_t count)
{
        struct i2c_client *client = to_i2c_client(dev);
        struct w83627hf_data *data = i2c_get_clientdata(client);
        u32 val;

        val = simple_strtoul(buf, NULL, 10);

        mutex_lock(&data->update_lock);

        if ((data->vrm_ovt & 0x01) &&
                (w83627thf == data->type || w83637hf == data->type
                 || w83687thf == data->type))
                
                /* use VRM9 calculation */
                data->in_max[0] =
                        SENSORS_LIMIT(((val * 100) - 70000 + 244) / 488, 0,
                                        255);
        else
                /* use VRM8 (standard) calculation */
                data->in_max[0] = IN_TO_REG(val);

        w83627hf_write_value(client, W83781D_REG_IN_MAX(0), data->in_max[0]);
        mutex_unlock(&data->update_lock);
        return count;
}

static DEVICE_ATTR(in0_input, S_IRUGO, show_regs_in_0, NULL);
static DEVICE_ATTR(in0_min, S_IRUGO | S_IWUSR,
        show_regs_in_min0, store_regs_in_min0);
static DEVICE_ATTR(in0_max, S_IRUGO | S_IWUSR,
        show_regs_in_max0, store_regs_in_max0);

#define show_fan_reg(reg) \
static ssize_t show_##reg (struct device *dev, char *buf, int nr) \
{ \
        struct w83627hf_data *data = w83627hf_update_device(dev); \
        return sprintf(buf,"%ld\n", \
                FAN_FROM_REG(data->reg[nr-1], \
                            (long)DIV_FROM_REG(data->fan_div[nr-1]))); \
}
show_fan_reg(fan);
show_fan_reg(fan_min);

static ssize_t
store_fan_min(struct device *dev, const char *buf, size_t count, int nr)
{
        struct i2c_client *client = to_i2c_client(dev);
        struct w83627hf_data *data = i2c_get_clientdata(client);
        u32 val;

        val = simple_strtoul(buf, NULL, 10);

        mutex_lock(&data->update_lock);
        data->fan_min[nr - 1] =
            FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr - 1]));
        w83627hf_write_value(client, W83781D_REG_FAN_MIN(nr),
                            data->fan_min[nr - 1]);

        mutex_unlock(&data->update_lock);
        return count;
}

#define sysfs_fan_offset(offset) \
static ssize_t show_regs_fan_##offset (struct device *dev, struct device_attribute *attr, char *buf) \
{ \
        return show_fan(dev, buf, offset); \
} \
static DEVICE_ATTR(fan##offset##_input, S_IRUGO, show_regs_fan_##offset, NULL);

#define sysfs_fan_min_offset(offset) \
static ssize_t show_regs_fan_min##offset (struct device *dev, struct device_attribute *attr, char *buf) \
{ \
        return show_fan_min(dev, buf, offset); \
} \
static ssize_t \
store_regs_fan_min##offset (struct device *dev, struct device_attribute *attr, const char *buf, size_t count) \
{ \
        return store_fan_min(dev, buf, count, offset); \
} \
static DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \
                  show_regs_fan_min##offset, store_regs_fan_min##offset);

sysfs_fan_offset(1);
sysfs_fan_min_offset(1);
sysfs_fan_offset(2);
sysfs_fan_min_offset(2);
sysfs_fan_offset(3);
sysfs_fan_min_offset(3);

#define show_temp_reg(reg) \
static ssize_t show_##reg (struct device *dev, char *buf, int nr) \
{ \
        struct w83627hf_data *data = w83627hf_update_device(dev); \
        if (nr >= 2) {  /* TEMP2 and TEMP3 */ \
                return sprintf(buf,"%ld\n", \
                        (long)LM75_TEMP_FROM_REG(data->reg##_add[nr-2])); \
        } else {        /* TEMP1 */ \
                return sprintf(buf,"%ld\n", (long)TEMP_FROM_REG(data->reg)); \
        } \
}
show_temp_reg(temp);
show_temp_reg(temp_max);
show_temp_reg(temp_max_hyst);

#define store_temp_reg(REG, reg) \
static ssize_t \
store_temp_##reg (struct device *dev, const char *buf, size_t count, int nr) \
{ \
        struct i2c_client *client = to_i2c_client(dev); \
        struct w83627hf_data *data = i2c_get_clientdata(client); \
        u32 val; \
         \
        val = simple_strtoul(buf, NULL, 10); \
         \
        mutex_lock(&data->update_lock); \
         \
        if (nr >= 2) {  /* TEMP2 and TEMP3 */ \
                data->temp_##reg##_add[nr-2] = LM75_TEMP_TO_REG(val); \
                w83627hf_write_value(client, W83781D_REG_TEMP_##REG(nr), \
                                data->temp_##reg##_add[nr-2]); \
        } else {        /* TEMP1 */ \
                data->temp_##reg = TEMP_TO_REG(val); \
                w83627hf_write_value(client, W83781D_REG_TEMP_##REG(nr), \
                        data->temp_##reg); \
        } \
         \
        mutex_unlock(&data->update_lock); \
        return count; \
}
store_temp_reg(OVER, max);
store_temp_reg(HYST, max_hyst);

#define sysfs_temp_offset(offset) \
static ssize_t \
show_regs_temp_##offset (struct device *dev, struct device_attribute *attr, char *buf) \
{ \
        return show_temp(dev, buf, offset); \
} \
static DEVICE_ATTR(temp##offset##_input, S_IRUGO, show_regs_temp_##offset, NULL);

#define sysfs_temp_reg_offset(reg, offset) \
static ssize_t show_regs_temp_##reg##offset (struct device *dev, struct device_attribute *attr, char *buf) \
{ \
        return show_temp_##reg (dev, buf, offset); \
} \
static ssize_t \
store_regs_temp_##reg##offset (struct device *dev, struct device_attribute *attr, \
                              const char *buf, size_t count) \
{ \
        return store_temp_##reg (dev, buf, count, offset); \
} \
static DEVICE_ATTR(temp##offset##_##reg, S_IRUGO| S_IWUSR, \
                  show_regs_temp_##reg##offset, store_regs_temp_##reg##offset);

#define sysfs_temp_offsets(offset) \
sysfs_temp_offset(offset) \
sysfs_temp_reg_offset(max, offset) \
sysfs_temp_reg_offset(max_hyst, offset)

sysfs_temp_offsets(1);
sysfs_temp_offsets(2);
sysfs_temp_offsets(3);

static ssize_t
show_vid_reg(struct device *dev, struct device_attribute *attr, char *buf)
{
        struct w83627hf_data *data = w83627hf_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_vrm_reg(struct device *dev, struct device_attribute *attr, char *buf)
{
        struct w83627hf_data *data = w83627hf_update_device(dev);
        return sprintf(buf, "%ld\n", (long) data->vrm);
}
static ssize_t
store_vrm_reg(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
{
        struct i2c_client *client = to_i2c_client(dev);
        struct w83627hf_data *data = i2c_get_clientdata(client);
        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_alarms_reg(struct device *dev, struct device_attribute *attr, char *buf)
{
        struct w83627hf_data *data = w83627hf_update_device(dev);
        return sprintf(buf, "%ld\n", (long) data->alarms);
}
static DEVICE_ATTR(alarms, S_IRUGO, show_alarms_reg, NULL);

#define show_beep_reg(REG, reg) \
static ssize_t show_beep_##reg (struct device *dev, struct device_attribute *attr, char *buf) \
{ \
        struct w83627hf_data *data = w83627hf_update_device(dev); \
        return sprintf(buf,"%ld\n", \
                      (long)BEEP_##REG##_FROM_REG(data->beep_##reg)); \
}
show_beep_reg(ENABLE, enable)
show_beep_reg(MASK, mask)

#define BEEP_ENABLE                     0       /* Store beep_enable */
#define BEEP_MASK                       1       /* Store beep_mask */

static ssize_t
store_beep_reg(struct device *dev, const char *buf, size_t count,
               int update_mask)
{
        struct i2c_client *client = to_i2c_client(dev);
        struct w83627hf_data *data = i2c_get_clientdata(client);
        u32 val, val2;

        val = simple_strtoul(buf, NULL, 10);

        mutex_lock(&data->update_lock);

        if (update_mask == BEEP_MASK) { /* We are storing beep_mask */
                data->beep_mask = BEEP_MASK_TO_REG(val);
                w83627hf_write_value(client, W83781D_REG_BEEP_INTS1,
                                    data->beep_mask & 0xff);
                w83627hf_write_value(client, W83781D_REG_BEEP_INTS3,
                                    ((data->beep_mask) >> 16) & 0xff);
                val2 = (data->beep_mask >> 8) & 0x7f;
        } else {                /* We are storing beep_enable */
                val2 =
                    w83627hf_read_value(client, W83781D_REG_BEEP_INTS2) & 0x7f;
                data->beep_enable = BEEP_ENABLE_TO_REG(val);
        }

        w83627hf_write_value(client, W83781D_REG_BEEP_INTS2,
                            val2 | data->beep_enable << 7);

        mutex_unlock(&data->update_lock);
        return count;
}

#define sysfs_beep(REG, reg) \
static ssize_t show_regs_beep_##reg (struct device *dev, struct device_attribute *attr, char *buf) \
{ \
        return show_beep_##reg(dev, attr, buf); \
} \
static ssize_t \
store_regs_beep_##reg (struct device *dev, struct device_attribute *attr, const char *buf, size_t count) \
{ \
        return store_beep_reg(dev, buf, count, BEEP_##REG); \
} \
static DEVICE_ATTR(beep_##reg, S_IRUGO | S_IWUSR, \
                  show_regs_beep_##reg, store_regs_beep_##reg);

sysfs_beep(ENABLE, enable);
sysfs_beep(MASK, mask);

static ssize_t
show_fan_div_reg(struct device *dev, char *buf, int nr)
{
        struct w83627hf_data *data = w83627hf_update_device(dev);
        return sprintf(buf, "%ld\n",
                       (long) DIV_FROM_REG(data->fan_div[nr - 1]));
}

/* Note: we save and restore the fan minimum here, because its value is
   determined in part by the fan divisor.  This follows the principle of
   least surprise; the user doesn't expect the fan minimum to change just
   because the divisor changed. */
static ssize_t
store_fan_div_reg(struct device *dev, const char *buf, size_t count, int nr)
{
        struct i2c_client *client = to_i2c_client(dev);
        struct w83627hf_data *data = i2c_get_clientdata(client);
        unsigned long min;
        u8 reg;
        unsigned long val = simple_strtoul(buf, NULL, 10);

        mutex_lock(&data->update_lock);

        /* Save fan_min */
        min = FAN_FROM_REG(data->fan_min[nr],
                           DIV_FROM_REG(data->fan_div[nr]));

        data->fan_div[nr] = DIV_TO_REG(val);

        reg = (w83627hf_read_value(client, nr==2 ? W83781D_REG_PIN : W83781D_REG_VID_FANDIV)
               & (nr==0 ? 0xcf : 0x3f))
            | ((data->fan_div[nr] & 0x03) << (nr==0 ? 4 : 6));
        w83627hf_write_value(client, nr==2 ? W83781D_REG_PIN : W83781D_REG_VID_FANDIV, reg);

        reg = (w83627hf_read_value(client, W83781D_REG_VBAT)
               & ~(1 << (5 + nr)))
            | ((data->fan_div[nr] & 0x04) << (3 + nr));
        w83627hf_write_value(client, W83781D_REG_VBAT, reg);

        /* Restore fan_min */
        data->fan_min[nr] = FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr]));
        w83627hf_write_value(client, W83781D_REG_FAN_MIN(nr+1), data->fan_min[nr]);

        mutex_unlock(&data->update_lock);
        return count;
}

#define sysfs_fan_div(offset) \
static ssize_t show_regs_fan_div_##offset (struct device *dev, struct device_attribute *attr, char *buf) \
{ \
        return show_fan_div_reg(dev, buf, offset); \
} \
static ssize_t \
store_regs_fan_div_##offset (struct device *dev, struct device_attribute *attr, \
                            const char *buf, size_t count) \
{ \
        return store_fan_div_reg(dev, buf, count, offset - 1); \
} \
static DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR, \
                  show_regs_fan_div_##offset, store_regs_fan_div_##offset);

sysfs_fan_div(1);
sysfs_fan_div(2);
sysfs_fan_div(3);

static ssize_t
show_pwm_reg(struct device *dev, char *buf, int nr)
{
        struct w83627hf_data *data = w83627hf_update_device(dev);
        return sprintf(buf, "%ld\n", (long) data->pwm[nr - 1]);
}

static ssize_t
store_pwm_reg(struct device *dev, const char *buf, size_t count, int nr)
{
        struct i2c_client *client = to_i2c_client(dev);
        struct w83627hf_data *data = i2c_get_clientdata(client);
        u32 val;

        val = simple_strtoul(buf, NULL, 10);

        mutex_lock(&data->update_lock);

        if (data->type == w83627thf) {
                /* bits 0-3 are reserved  in 627THF */
                data->pwm[nr - 1] = PWM_TO_REG(val) & 0xf0;
                w83627hf_write_value(client,
                                     W836X7HF_REG_PWM(data->type, nr),
                                     data->pwm[nr - 1] |
                                     (w83627hf_read_value(client,
                                     W836X7HF_REG_PWM(data->type, nr)) & 0x0f));
        } else {
                data->pwm[nr - 1] = PWM_TO_REG(val);
                w83627hf_write_value(client,
                                     W836X7HF_REG_PWM(data->type, nr),
                                     data->pwm[nr - 1]);
        }

        mutex_unlock(&data->update_lock);
        return count;
}

#define sysfs_pwm(offset) \
static ssize_t show_regs_pwm_##offset (struct device *dev, struct device_attribute *attr, char *buf) \
{ \
        return show_pwm_reg(dev, buf, offset); \
} \
static ssize_t \
store_regs_pwm_##offset (struct device *dev, struct device_attribute *attr, const char *buf, size_t count) \
{ \
        return store_pwm_reg(dev, buf, count, offset); \
} \
static DEVICE_ATTR(pwm##offset, S_IRUGO | S_IWUSR, \
                  show_regs_pwm_##offset, store_regs_pwm_##offset);

sysfs_pwm(1);
sysfs_pwm(2);
sysfs_pwm(3);

static ssize_t
show_sensor_reg(struct device *dev, char *buf, int nr)
{
        struct w83627hf_data *data = w83627hf_update_device(dev);
        return sprintf(buf, "%ld\n", (long) data->sens[nr - 1]);
}

static ssize_t
store_sensor_reg(struct device *dev, const char *buf, size_t count, int nr)
{
        struct i2c_client *client = to_i2c_client(dev);
        struct w83627hf_data *data = i2c_get_clientdata(client);
        u32 val, tmp;

        val = simple_strtoul(buf, NULL, 10);

        mutex_lock(&data->update_lock);

        switch (val) {
        case 1:         /* PII/Celeron diode */
                tmp = w83627hf_read_value(client, W83781D_REG_SCFG1);
                w83627hf_write_value(client, W83781D_REG_SCFG1,
                                    tmp | BIT_SCFG1[nr - 1]);
                tmp = w83627hf_read_value(client, W83781D_REG_SCFG2);
                w83627hf_write_value(client, W83781D_REG_SCFG2,
                                    tmp | BIT_SCFG2[nr - 1]);
                data->sens[nr - 1] = val;
                break;
        case 2:         /* 3904 */
                tmp = w83627hf_read_value(client, W83781D_REG_SCFG1);
                w83627hf_write_value(client, W83781D_REG_SCFG1,
                                    tmp | BIT_SCFG1[nr - 1]);
                tmp = w83627hf_read_value(client, W83781D_REG_SCFG2);
                w83627hf_write_value(client, W83781D_REG_SCFG2,
                                    tmp & ~BIT_SCFG2[nr - 1]);
                data->sens[nr - 1] = val;
                break;
        case W83781D_DEFAULT_BETA:      /* thermistor */
                tmp = w83627hf_read_value(client, W83781D_REG_SCFG1);
                w83627hf_write_value(client, W83781D_REG_SCFG1,
                                    tmp & ~BIT_SCFG1[nr - 1]);
                data->sens[nr - 1] = val;
                break;
        default:
                dev_err(&client->dev,
                       "Invalid sensor type %ld; must be 1, 2, or %d\n",
                       (long) val, W83781D_DEFAULT_BETA);
                break;
        }

        mutex_unlock(&data->update_lock);
        return count;
}

#define sysfs_sensor(offset) \
static ssize_t show_regs_sensor_##offset (struct device *dev, struct device_attribute *attr, char *buf) \
{ \
    return show_sensor_reg(dev, buf, offset); \
} \
static ssize_t \
store_regs_sensor_##offset (struct device *dev, struct device_attribute *attr, const char *buf, size_t count) \
{ \
    return store_sensor_reg(dev, buf, count, offset); \
} \
static DEVICE_ATTR(temp##offset##_type, S_IRUGO | S_IWUSR, \
                  show_regs_sensor_##offset, store_regs_sensor_##offset);

sysfs_sensor(1);
sysfs_sensor(2);
sysfs_sensor(3);

static int __init w83627hf_find(int sioaddr, unsigned short *addr)
{
        u16 val;

        REG = sioaddr;
        VAL = sioaddr + 1;

        superio_enter();
        val= superio_inb(DEVID);
        if(val != W627_DEVID &&
           val != W627THF_DEVID &&
           val != W697_DEVID &&
           val != W637_DEVID &&
           val != W687THF_DEVID) {
                superio_exit();
                return -ENODEV;
        }

        superio_select(W83627HF_LD_HWM);
        val = (superio_inb(WINB_BASE_REG) << 8) |
               superio_inb(WINB_BASE_REG + 1);
        *addr = val & WINB_ALIGNMENT;
        if (*addr == 0 && force_addr == 0) {
                superio_exit();
                return -ENODEV;
        }

        superio_exit();
        return 0;
}

static struct attribute *w83627hf_attributes[] = {
        &dev_attr_in0_input.attr,
        &dev_attr_in0_min.attr,
        &dev_attr_in0_max.attr,
        &dev_attr_in2_input.attr,
        &dev_attr_in2_min.attr,
        &dev_attr_in2_max.attr,
        &dev_attr_in3_input.attr,
        &dev_attr_in3_min.attr,
        &dev_attr_in3_max.attr,
        &dev_attr_in4_input.attr,
        &dev_attr_in4_min.attr,
        &dev_attr_in4_max.attr,
        &dev_attr_in7_input.attr,
        &dev_attr_in7_min.attr,
        &dev_attr_in7_max.attr,
        &dev_attr_in8_input.attr,
        &dev_attr_in8_min.attr,
        &dev_attr_in8_max.attr,

        &dev_attr_fan1_input.attr,
        &dev_attr_fan1_min.attr,
        &dev_attr_fan1_div.attr,
        &dev_attr_fan2_input.attr,
        &dev_attr_fan2_min.attr,
        &dev_attr_fan2_div.attr,

        &dev_attr_temp1_input.attr,
        &dev_attr_temp1_max.attr,
        &dev_attr_temp1_max_hyst.attr,
        &dev_attr_temp1_type.attr,
        &dev_attr_temp2_input.attr,
        &dev_attr_temp2_max.attr,
        &dev_attr_temp2_max_hyst.attr,
        &dev_attr_temp2_type.attr,

        &dev_attr_alarms.attr,
        &dev_attr_beep_enable.attr,
        &dev_attr_beep_mask.attr,

        &dev_attr_pwm1.attr,
        &dev_attr_pwm2.attr,

        NULL
};

static const struct attribute_group w83627hf_group = {
        .attrs = w83627hf_attributes,
};

static struct attribute *w83627hf_attributes_opt[] = {
        &dev_attr_in1_input.attr,
        &dev_attr_in1_min.attr,
        &dev_attr_in1_max.attr,
        &dev_attr_in5_input.attr,
        &dev_attr_in5_min.attr,
        &dev_attr_in5_max.attr,
        &dev_attr_in6_input.attr,
        &dev_attr_in6_min.attr,
        &dev_attr_in6_max.attr,

        &dev_attr_fan3_input.attr,
        &dev_attr_fan3_min.attr,
        &dev_attr_fan3_div.attr,

        &dev_attr_temp3_input.attr,
        &dev_attr_temp3_max.attr,
        &dev_attr_temp3_max_hyst.attr,
        &dev_attr_temp3_type.attr,

        &dev_attr_pwm3.attr,

        NULL
};

static const struct attribute_group w83627hf_group_opt = {
        .attrs = w83627hf_attributes_opt,
};

static int w83627hf_detect(struct i2c_adapter *adapter)
{
        int val, kind;
        struct i2c_client *new_client;
        struct w83627hf_data *data;
        int err = 0;
        const char *client_name = "";

        if(force_addr)
                address = force_addr & WINB_ALIGNMENT;

        if (!request_region(address + WINB_REGION_OFFSET, WINB_REGION_SIZE,
                            w83627hf_driver.driver.name)) {
                err = -EBUSY;
                goto ERROR0;
        }

        if(force_addr) {
                printk("w83627hf.o: forcing ISA address 0x%04X\n", address);
                superio_enter();
                superio_select(W83627HF_LD_HWM);
                superio_outb(WINB_BASE_REG, address >> 8);
                superio_outb(WINB_BASE_REG+1, address & 0xff);
                superio_exit();
        }

        superio_enter();
        val= superio_inb(DEVID);
        if(val == W627_DEVID)
                kind = w83627hf;
        else if(val == W697_DEVID)
                kind = w83697hf;
        else if(val == W627THF_DEVID)
                kind = w83627thf;
        else if(val == W637_DEVID)
                kind = w83637hf;
        else if (val == W687THF_DEVID)
                kind = w83687thf;
        else {
                dev_info(&adapter->dev,
                         "Unsupported chip (dev_id=0x%02X).\n", val);
                goto ERROR1;
        }

        superio_select(W83627HF_LD_HWM);
        if((val = 0x01 & superio_inb(WINB_ACT_REG)) == 0)
                superio_outb(WINB_ACT_REG, 1);
        superio_exit();

        /* OK. For now, we presume we have a valid client. We now create the
           client structure, even though we cannot fill it completely yet.
           But it allows us to access w83627hf_{read,write}_value. */

        if (!(data = kzalloc(sizeof(struct w83627hf_data), GFP_KERNEL))) {
                err = -ENOMEM;
                goto ERROR1;
        }

        new_client = &data->client;
        i2c_set_clientdata(new_client, data);
        new_client->addr = address;
        mutex_init(&data->lock);
        new_client->adapter = adapter;
        new_client->driver = &w83627hf_driver;
        new_client->flags = 0;


        if (kind == w83627hf) {
                client_name = "w83627hf";
        } else if (kind == w83627thf) {
                client_name = "w83627thf";
        } else if (kind == w83697hf) {
                client_name = "w83697hf";
        } else if (kind == w83637hf) {
                client_name = "w83637hf";
        } else if (kind == w83687thf) {
                client_name = "w83687thf";
        }

        /* Fill in the remaining client fields and put into the global list */
        strlcpy(new_client->name, client_name, I2C_NAME_SIZE);
        data->type = kind;
        data->valid = 0;
        mutex_init(&data->update_lock);

        /* Tell the I2C layer a new client has arrived */
        if ((err = i2c_attach_client(new_client)))
                goto ERROR2;

        data->lm75 = NULL;

        /* Initialize the chip */
        w83627hf_init_client(new_client);

        /* A few vars need to be filled upon startup */
        data->fan_min[0] = w83627hf_read_value(new_client, W83781D_REG_FAN_MIN(1));
        data->fan_min[1] = w83627hf_read_value(new_client, W83781D_REG_FAN_MIN(2));
        data->fan_min[2] = w83627hf_read_value(new_client, W83781D_REG_FAN_MIN(3));

        /* Register common device attributes */
        if ((err = sysfs_create_group(&new_client->dev.kobj, &w83627hf_group)))
                goto ERROR3;

        /* Register chip-specific device attributes */
        if (kind == w83627hf || kind == w83697hf)
                if ((err = device_create_file(&new_client->dev,
                                        &dev_attr_in5_input))
                 || (err = device_create_file(&new_client->dev,
                                        &dev_attr_in5_min))
                 || (err = device_create_file(&new_client->dev,
                                        &dev_attr_in5_max))
                 || (err = device_create_file(&new_client->dev,
                                        &dev_attr_in6_input))
                 || (err = device_create_file(&new_client->dev,
                                        &dev_attr_in6_min))
                 || (err = device_create_file(&new_client->dev,
                                        &dev_attr_in6_max)))
                        goto ERROR4;

        if (kind != w83697hf)
                if ((err = device_create_file(&new_client->dev,
                                        &dev_attr_in1_input))
                 || (err = device_create_file(&new_client->dev,
                                        &dev_attr_in1_min))
                 || (err = device_create_file(&new_client->dev,
                                        &dev_attr_in1_max))
                 || (err = device_create_file(&new_client->dev,
                                        &dev_attr_fan3_input))
                 || (err = device_create_file(&new_client->dev,
                                        &dev_attr_fan3_min))
                 || (err = device_create_file(&new_client->dev,
                                        &dev_attr_fan3_div))
                 || (err = device_create_file(&new_client->dev,
                                        &dev_attr_temp3_input))
                 || (err = device_create_file(&new_client->dev,
                                        &dev_attr_temp3_max))
                 || (err = device_create_file(&new_client->dev,
                                        &dev_attr_temp3_max_hyst))
                 || (err = device_create_file(&new_client->dev,
                                        &dev_attr_temp3_type)))
                        goto ERROR4;

        if (kind != w83697hf && data->vid != 0xff) {
                /* Convert VID to voltage based on VRM */
                data->vrm = vid_which_vrm();

                if ((err = device_create_file(&new_client->dev,
                                        &dev_attr_cpu0_vid))
                 || (err = device_create_file(&new_client->dev,
                                        &dev_attr_vrm)))
                        goto ERROR4;
        }

        if (kind == w83627thf || kind == w83637hf || kind == w83687thf)
                if ((err = device_create_file(&new_client->dev,
                                        &dev_attr_pwm3)))
                        goto ERROR4;

        data->class_dev = hwmon_device_register(&new_client->dev);
        if (IS_ERR(data->class_dev)) {
                err = PTR_ERR(data->class_dev);
                goto ERROR4;
        }

        return 0;

      ERROR4:
        sysfs_remove_group(&new_client->dev.kobj, &w83627hf_group);
        sysfs_remove_group(&new_client->dev.kobj, &w83627hf_group_opt);
      ERROR3:
        i2c_detach_client(new_client);
      ERROR2:
        kfree(data);
      ERROR1:
        release_region(address + WINB_REGION_OFFSET, WINB_REGION_SIZE);
      ERROR0:
        return err;
}

static int w83627hf_detach_client(struct i2c_client *client)
{
        struct w83627hf_data *data = i2c_get_clientdata(client);
        int err;

        hwmon_device_unregister(data->class_dev);

        sysfs_remove_group(&client->dev.kobj, &w83627hf_group);
        sysfs_remove_group(&client->dev.kobj, &w83627hf_group_opt);

        if ((err = i2c_detach_client(client)))
                return err;

        release_region(client->addr + WINB_REGION_OFFSET, WINB_REGION_SIZE);
        kfree(data);

        return 0;
}


/*
   ISA access must always be locked explicitly!
   We ignore the W83781D BUSY flag at this moment - it could lead to deadlocks,
   would slow down the W83781D access and should not be necessary.
   There are some ugly typecasts here, but the good news is - they should
   nowhere else be necessary! */
static int w83627hf_read_value(struct i2c_client *client, u16 reg)
{
        struct w83627hf_data *data = i2c_get_clientdata(client);
        int res, word_sized;

        mutex_lock(&data->lock);
        word_sized = (((reg & 0xff00) == 0x100)
                   || ((reg & 0xff00) == 0x200))
                  && (((reg & 0x00ff) == 0x50)
                   || ((reg & 0x00ff) == 0x53)
                   || ((reg & 0x00ff) == 0x55));
        if (reg & 0xff00) {
                outb_p(W83781D_REG_BANK,
                       client->addr + W83781D_ADDR_REG_OFFSET);
                outb_p(reg >> 8,
                       client->addr + W83781D_DATA_REG_OFFSET);
        }
        outb_p(reg & 0xff, client->addr + W83781D_ADDR_REG_OFFSET);
        res = inb_p(client->addr + W83781D_DATA_REG_OFFSET);
        if (word_sized) {
                outb_p((reg & 0xff) + 1,
                       client->addr + W83781D_ADDR_REG_OFFSET);
                res =
                    (res << 8) + inb_p(client->addr +
                                       W83781D_DATA_REG_OFFSET);
        }
        if (reg & 0xff00) {
                outb_p(W83781D_REG_BANK,
                       client->addr + W83781D_ADDR_REG_OFFSET);
                outb_p(0, client->addr + W83781D_DATA_REG_OFFSET);
        }
        mutex_unlock(&data->lock);
        return res;
}

static int w83627thf_read_gpio5(struct i2c_client *client)
{
        int res = 0xff, sel;

        superio_enter();
        superio_select(W83627HF_LD_GPIO5);

        /* Make sure these GPIO pins are enabled */
        if (!(superio_inb(W83627THF_GPIO5_EN) & (1<<3))) {
                dev_dbg(&client->dev, "GPIO5 disabled, no VID function\n");
                goto exit;
        }

        /* Make sure the pins are configured for input
           There must be at least five (VRM 9), and possibly 6 (VRM 10) */
        sel = superio_inb(W83627THF_GPIO5_IOSR) & 0x3f;
        if ((sel & 0x1f) != 0x1f) {
                dev_dbg(&client->dev, "GPIO5 not configured for VID "
                        "function\n");
                goto exit;
        }

        dev_info(&client->dev, "Reading VID from GPIO5\n");
        res = superio_inb(W83627THF_GPIO5_DR) & sel;

exit:
        superio_exit();
        return res;
}

static int w83687thf_read_vid(struct i2c_client *client)
{
        int res = 0xff;

        superio_enter();
        superio_select(W83627HF_LD_HWM);

        /* Make sure these GPIO pins are enabled */
        if (!(superio_inb(W83687THF_VID_EN) & (1 << 2))) {
                dev_dbg(&client->dev, "VID disabled, no VID function\n");
                goto exit;
        }

        /* Make sure the pins are configured for input */
        if (!(superio_inb(W83687THF_VID_CFG) & (1 << 4))) {
                dev_dbg(&client->dev, "VID configured as output, "
                        "no VID function\n");
                goto exit;
        }

        res = superio_inb(W83687THF_VID_DATA) & 0x3f;

exit:
        superio_exit();
        return res;
}

static int w83627hf_write_value(struct i2c_client *client, u16 reg, u16 value)
{
        struct w83627hf_data *data = i2c_get_clientdata(client);
        int word_sized;

        mutex_lock(&data->lock);
        word_sized = (((reg & 0xff00) == 0x100)
                   || ((reg & 0xff00) == 0x200))
                  && (((reg & 0x00ff) == 0x53)
                   || ((reg & 0x00ff) == 0x55));
        if (reg & 0xff00) {
                outb_p(W83781D_REG_BANK,
                       client->addr + W83781D_ADDR_REG_OFFSET);
                outb_p(reg >> 8,
                       client->addr + W83781D_DATA_REG_OFFSET);
        }
        outb_p(reg & 0xff, client->addr + W83781D_ADDR_REG_OFFSET);
        if (word_sized) {
                outb_p(value >> 8,
                       client->addr + W83781D_DATA_REG_OFFSET);
                outb_p((reg & 0xff) + 1,
                       client->addr + W83781D_ADDR_REG_OFFSET);
        }
        outb_p(value & 0xff,
               client->addr + W83781D_DATA_REG_OFFSET);
        if (reg & 0xff00) {
                outb_p(W83781D_REG_BANK,
                       client->addr + W83781D_ADDR_REG_OFFSET);
                outb_p(0, client->addr + W83781D_DATA_REG_OFFSET);
        }
        mutex_unlock(&data->lock);
        return 0;
}

static void w83627hf_init_client(struct i2c_client *client)
{
        struct w83627hf_data *data = i2c_get_clientdata(client);
        int i;
        int type = data->type;
        u8 tmp;

        if (reset) {
                /* Resetting the chip has been the default for a long time,
                   but repeatedly caused problems (fans going to full
                   speed...) so it is now optional. It might even go away if
                   nobody reports it as being useful, as I see very little
                   reason why this would be needed at all. */
                dev_info(&client->dev, "If reset=1 solved a problem you were "
                         "having, please report!\n");

                /* save this register */
                i = w83627hf_read_value(client, W83781D_REG_BEEP_CONFIG);
                /* Reset all except Watchdog values and last conversion values
                   This sets fan-divs to 2, among others */
                w83627hf_write_value(client, W83781D_REG_CONFIG, 0x80);
                /* Restore the register and disable power-on abnormal beep.
                   This saves FAN 1/2/3 input/output values set by BIOS. */
                w83627hf_write_value(client, W83781D_REG_BEEP_CONFIG, i | 0x80);
                /* Disable master beep-enable (reset turns it on).
                   Individual beeps should be reset to off but for some reason
                   disabling this bit helps some people not get beeped */
                w83627hf_write_value(client, W83781D_REG_BEEP_INTS2, 0);
        }

        /* Minimize conflicts with other winbond i2c-only clients...  */
        /* disable i2c subclients... how to disable main i2c client?? */
        /* force i2c address to relatively uncommon address */
        w83627hf_write_value(client, W83781D_REG_I2C_SUBADDR, 0x89);
        w83627hf_write_value(client, W83781D_REG_I2C_ADDR, force_i2c);

        /* Read VID only once */
        if (w83627hf == data->type || w83637hf == data->type) {
                int lo = w83627hf_read_value(client, W83781D_REG_VID_FANDIV);
                int hi = w83627hf_read_value(client, W83781D_REG_CHIPID);
                data->vid = (lo & 0x0f) | ((hi & 0x01) << 4);
        } else if (w83627thf == data->type) {
                data->vid = w83627thf_read_gpio5(client);
        } else if (w83687thf == data->type) {
                data->vid = w83687thf_read_vid(client);
        }

        /* Read VRM & OVT Config only once */
        if (w83627thf == data->type || w83637hf == data->type
         || w83687thf == data->type) {
                data->vrm_ovt = 
                        w83627hf_read_value(client, W83627THF_REG_VRM_OVT_CFG);
        }

        tmp = w83627hf_read_value(client, W83781D_REG_SCFG1);
        for (i = 1; i <= 3; i++) {
                if (!(tmp & BIT_SCFG1[i - 1])) {
                        data->sens[i - 1] = W83781D_DEFAULT_BETA;
                } else {
                        if (w83627hf_read_value
                            (client,
                             W83781D_REG_SCFG2) & BIT_SCFG2[i - 1])
                                data->sens[i - 1] = 1;
                        else
                                data->sens[i - 1] = 2;
                }
                if ((type == w83697hf) && (i == 2))
                        break;
        }

        if(init) {
                /* Enable temp2 */
                tmp = w83627hf_read_value(client, W83781D_REG_TEMP2_CONFIG);
                if (tmp & 0x01) {
                        dev_warn(&client->dev, "Enabling temp2, readings "
                                 "might not make sense\n");
                        w83627hf_write_value(client, W83781D_REG_TEMP2_CONFIG,
                                tmp & 0xfe);
                }

                /* Enable temp3 */
                if (type != w83697hf) {
                        tmp = w83627hf_read_value(client,
                                W83781D_REG_TEMP3_CONFIG);
                        if (tmp & 0x01) {
                                dev_warn(&client->dev, "Enabling temp3, "
                                         "readings might not make sense\n");
                                w83627hf_write_value(client,
                                        W83781D_REG_TEMP3_CONFIG, tmp & 0xfe);
                        }
                }
        }

        /* Start monitoring */
        w83627hf_write_value(client, W83781D_REG_CONFIG,
                            (w83627hf_read_value(client,
                                                W83781D_REG_CONFIG) & 0xf7)
                            | 0x01);
}

static struct w83627hf_data *w83627hf_update_device(struct device *dev)
{
        struct i2c_client *client = to_i2c_client(dev);
        struct w83627hf_data *data = i2c_get_clientdata(client);
        int i;

        mutex_lock(&data->update_lock);

        if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
            || !data->valid) {
                for (i = 0; i <= 8; i++) {
                        /* skip missing sensors */
                        if (((data->type == w83697hf) && (i == 1)) ||
                            ((data->type != w83627hf && data->type != w83697hf)
                            && (i == 5 || i == 6)))
                                continue;
                        data->in[i] =
                            w83627hf_read_value(client, W83781D_REG_IN(i));
                        data->in_min[i] =
                            w83627hf_read_value(client,
                                               W83781D_REG_IN_MIN(i));
                        data->in_max[i] =
                            w83627hf_read_value(client,
                                               W83781D_REG_IN_MAX(i));
                }
                for (i = 1; i <= 3; i++) {
                        data->fan[i - 1] =
                            w83627hf_read_value(client, W83781D_REG_FAN(i));
                        data->fan_min[i - 1] =
                            w83627hf_read_value(client,
                                               W83781D_REG_FAN_MIN(i));
                }
                for (i = 1; i <= 3; i++) {
                        u8 tmp = w83627hf_read_value(client,
                                W836X7HF_REG_PWM(data->type, i));
                        /* bits 0-3 are reserved  in 627THF */
                        if (data->type == w83627thf)
                                tmp &= 0xf0;
                        data->pwm[i - 1] = tmp;
                        if(i == 2 &&
                           (data->type == w83627hf || data->type == w83697hf))
                                break;
                }

                data->temp = w83627hf_read_value(client, W83781D_REG_TEMP(1));
                data->temp_max =
                    w83627hf_read_value(client, W83781D_REG_TEMP_OVER(1));
                data->temp_max_hyst =
                    w83627hf_read_value(client, W83781D_REG_TEMP_HYST(1));
                data->temp_add[0] =
                    w83627hf_read_value(client, W83781D_REG_TEMP(2));
                data->temp_max_add[0] =
                    w83627hf_read_value(client, W83781D_REG_TEMP_OVER(2));
                data->temp_max_hyst_add[0] =
                    w83627hf_read_value(client, W83781D_REG_TEMP_HYST(2));
                if (data->type != w83697hf) {
                        data->temp_add[1] =
                          w83627hf_read_value(client, W83781D_REG_TEMP(3));
                        data->temp_max_add[1] =
                          w83627hf_read_value(client, W83781D_REG_TEMP_OVER(3));
                        data->temp_max_hyst_add[1] =
                          w83627hf_read_value(client, W83781D_REG_TEMP_HYST(3));
                }

                i = w83627hf_read_value(client, W83781D_REG_VID_FANDIV);
                data->fan_div[0] = (i >> 4) & 0x03;
                data->fan_div[1] = (i >> 6) & 0x03;
                if (data->type != w83697hf) {
                        data->fan_div[2] = (w83627hf_read_value(client,
                                               W83781D_REG_PIN) >> 6) & 0x03;
                }
                i = w83627hf_read_value(client, W83781D_REG_VBAT);
                data->fan_div[0] |= (i >> 3) & 0x04;
                data->fan_div[1] |= (i >> 4) & 0x04;
                if (data->type != w83697hf)
                        data->fan_div[2] |= (i >> 5) & 0x04;
                data->alarms =
                    w83627hf_read_value(client, W83781D_REG_ALARM1) |
                    (w83627hf_read_value(client, W83781D_REG_ALARM2) << 8) |
                    (w83627hf_read_value(client, W83781D_REG_ALARM3) << 16);
                i = w83627hf_read_value(client, W83781D_REG_BEEP_INTS2);
                data->beep_enable = i >> 7;
                data->beep_mask = ((i & 0x7f) << 8) |
                    w83627hf_read_value(client, W83781D_REG_BEEP_INTS1) |
                    w83627hf_read_value(client, W83781D_REG_BEEP_INTS3) << 16;
                data->last_updated = jiffies;
                data->valid = 1;
        }

        mutex_unlock(&data->update_lock);

        return data;
}

static int __init sensors_w83627hf_init(void)
{
        if (w83627hf_find(0x2e, &address)
         && w83627hf_find(0x4e, &address)) {
                return -ENODEV;
        }

        return i2c_isa_add_driver(&w83627hf_driver);
}

static void __exit sensors_w83627hf_exit(void)
{
        i2c_isa_del_driver(&w83627hf_driver);
}

MODULE_AUTHOR("Frodo Looijaard <frodol@dds.nl>, "
              "Philip Edelbrock <phil@netroedge.com>, "
              "and Mark Studebaker <mdsxyz123@yahoo.com>");
MODULE_DESCRIPTION("W83627HF driver");
MODULE_LICENSE("GPL");

module_init(sensors_w83627hf_init);
module_exit(sensors_w83627hf_exit);