w83791d.c 41.1 KB
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/*
    w83791d.c - Part of lm_sensors, Linux kernel modules for hardware
                monitoring

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    Copyright (C) 2006-2007 Charles Spirakis <bezaur@gmail.com>
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    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
    w83791d	10	5	3	3	0x71	0x5ca3	yes	no

    The w83791d chip appears to be part way between the 83781d and the
    83792d. Thus, this file is derived from both the w83792d.c and
C
Charles Spirakis 已提交
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    w83781d.c files.

    The w83791g chip is the same as the w83791d but lead-free.
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*/

#include <linux/module.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/i2c.h>
#include <linux/hwmon.h>
#include <linux/hwmon-vid.h>
#include <linux/hwmon-sysfs.h>
#include <linux/err.h>
#include <linux/mutex.h>

#define NUMBER_OF_VIN		10
#define NUMBER_OF_FANIN		5
#define NUMBER_OF_TEMPIN	3

/* Addresses to scan */
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static const unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, 0x2f,
						I2C_CLIENT_END };
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/* Insmod parameters */
I2C_CLIENT_INSMOD_1(w83791d);
I2C_CLIENT_MODULE_PARM(force_subclients, "List of subclient addresses: "
			"{bus, clientaddr, subclientaddr1, subclientaddr2}");

static int reset;
module_param(reset, bool, 0);
MODULE_PARM_DESC(reset, "Set to one to force a hardware chip reset");

static int init;
module_param(init, bool, 0);
MODULE_PARM_DESC(init, "Set to one to force extra software initialization");

/* The W83791D registers */
static const u8 W83791D_REG_IN[NUMBER_OF_VIN] = {
	0x20,			/* VCOREA in DataSheet */
	0x21,			/* VINR0 in DataSheet */
	0x22,			/* +3.3VIN in DataSheet */
	0x23,			/* VDD5V in DataSheet */
	0x24,			/* +12VIN in DataSheet */
	0x25,			/* -12VIN in DataSheet */
	0x26,			/* -5VIN in DataSheet */
	0xB0,			/* 5VSB in DataSheet */
	0xB1,			/* VBAT in DataSheet */
	0xB2			/* VINR1 in DataSheet */
};

static const u8 W83791D_REG_IN_MAX[NUMBER_OF_VIN] = {
	0x2B,			/* VCOREA High Limit in DataSheet */
	0x2D,			/* VINR0 High Limit in DataSheet */
	0x2F,			/* +3.3VIN High Limit in DataSheet */
	0x31,			/* VDD5V High Limit in DataSheet */
	0x33,			/* +12VIN High Limit in DataSheet */
	0x35,			/* -12VIN High Limit in DataSheet */
	0x37,			/* -5VIN High Limit in DataSheet */
	0xB4,			/* 5VSB High Limit in DataSheet */
	0xB6,			/* VBAT High Limit in DataSheet */
	0xB8			/* VINR1 High Limit in DataSheet */
};
static const u8 W83791D_REG_IN_MIN[NUMBER_OF_VIN] = {
	0x2C,			/* VCOREA Low Limit in DataSheet */
	0x2E,			/* VINR0 Low Limit in DataSheet */
	0x30,			/* +3.3VIN Low Limit in DataSheet */
	0x32,			/* VDD5V Low Limit in DataSheet */
	0x34,			/* +12VIN Low Limit in DataSheet */
	0x36,			/* -12VIN Low Limit in DataSheet */
	0x38,			/* -5VIN Low Limit in DataSheet */
	0xB5,			/* 5VSB Low Limit in DataSheet */
	0xB7,			/* VBAT Low Limit in DataSheet */
	0xB9			/* VINR1 Low Limit in DataSheet */
};
static const u8 W83791D_REG_FAN[NUMBER_OF_FANIN] = {
	0x28,			/* FAN 1 Count in DataSheet */
	0x29,			/* FAN 2 Count in DataSheet */
	0x2A,			/* FAN 3 Count in DataSheet */
	0xBA,			/* FAN 4 Count in DataSheet */
	0xBB,			/* FAN 5 Count in DataSheet */
};
static const u8 W83791D_REG_FAN_MIN[NUMBER_OF_FANIN] = {
	0x3B,			/* FAN 1 Count Low Limit in DataSheet */
	0x3C,			/* FAN 2 Count Low Limit in DataSheet */
	0x3D,			/* FAN 3 Count Low Limit in DataSheet */
	0xBC,			/* FAN 4 Count Low Limit in DataSheet */
	0xBD,			/* FAN 5 Count Low Limit in DataSheet */
};

static const u8 W83791D_REG_FAN_CFG[2] = {
	0x84,			/* FAN 1/2 configuration */
	0x95,			/* FAN 3 configuration */
};

static const u8 W83791D_REG_FAN_DIV[3] = {
	0x47,			/* contains FAN1 and FAN2 Divisor */
	0x4b,			/* contains FAN3 Divisor */
	0x5C,			/* contains FAN4 and FAN5 Divisor */
};

#define W83791D_REG_BANK		0x4E
#define W83791D_REG_TEMP2_CONFIG	0xC2
#define W83791D_REG_TEMP3_CONFIG	0xCA

static const u8 W83791D_REG_TEMP1[3] = {
	0x27,			/* TEMP 1 in DataSheet */
	0x39,			/* TEMP 1 Over in DataSheet */
	0x3A,			/* TEMP 1 Hyst in DataSheet */
};

static const u8 W83791D_REG_TEMP_ADD[2][6] = {
	{0xC0,			/* TEMP 2 in DataSheet */
	 0xC1,			/* TEMP 2(0.5 deg) in DataSheet */
	 0xC5,			/* TEMP 2 Over High part in DataSheet */
	 0xC6,			/* TEMP 2 Over Low part in DataSheet */
	 0xC3,			/* TEMP 2 Thyst High part in DataSheet */
	 0xC4},			/* TEMP 2 Thyst Low part in DataSheet */
	{0xC8,			/* TEMP 3 in DataSheet */
	 0xC9,			/* TEMP 3(0.5 deg) in DataSheet */
	 0xCD,			/* TEMP 3 Over High part in DataSheet */
	 0xCE,			/* TEMP 3 Over Low part in DataSheet */
	 0xCB,			/* TEMP 3 Thyst High part in DataSheet */
	 0xCC}			/* TEMP 3 Thyst Low part in DataSheet */
};

#define W83791D_REG_BEEP_CONFIG		0x4D

static const u8 W83791D_REG_BEEP_CTRL[3] = {
	0x56,			/* BEEP Control Register 1 */
	0x57,			/* BEEP Control Register 2 */
	0xA3,			/* BEEP Control Register 3 */
};

#define W83791D_REG_CONFIG		0x40
#define W83791D_REG_VID_FANDIV		0x47
#define W83791D_REG_DID_VID4		0x49
#define W83791D_REG_WCHIPID		0x58
#define W83791D_REG_CHIPMAN		0x4F
#define W83791D_REG_PIN			0x4B
#define W83791D_REG_I2C_SUBADDR		0x4A

#define W83791D_REG_ALARM1 0xA9	/* realtime status register1 */
#define W83791D_REG_ALARM2 0xAA	/* realtime status register2 */
#define W83791D_REG_ALARM3 0xAB	/* realtime status register3 */

#define W83791D_REG_VBAT		0x5D
#define W83791D_REG_I2C_ADDR		0x48

/* The SMBus locks itself. The Winbond W83791D has a bank select register
   (index 0x4e), but the driver only accesses registers in bank 0. Since
   we don't switch banks, we don't need any special code to handle
   locking access between bank switches */
static inline int w83791d_read(struct i2c_client *client, u8 reg)
{
	return i2c_smbus_read_byte_data(client, reg);
}

static inline int w83791d_write(struct i2c_client *client, u8 reg, u8 value)
{
	return i2c_smbus_write_byte_data(client, reg, value);
}

/* The analog voltage inputs have 16mV LSB. Since the sysfs output is
   in mV as would be measured on the chip input pin, need to just
   multiply/divide by 16 to translate from/to register values. */
#define IN_TO_REG(val)		(SENSORS_LIMIT((((val) + 8) / 16), 0, 255))
#define IN_FROM_REG(val)	((val) * 16)

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

/* for temp1 which is 8-bit resolution, LSB = 1 degree Celsius */
#define TEMP1_FROM_REG(val)	((val) * 1000)
#define TEMP1_TO_REG(val)	((val) <= -128000 ? -128 : \
				 (val) >= 127000 ? 127 : \
				 (val) < 0 ? ((val) - 500) / 1000 : \
				 ((val) + 500) / 1000)

/* for temp2 and temp3 which are 9-bit resolution, LSB = 0.5 degree Celsius
   Assumes the top 8 bits are the integral amount and the bottom 8 bits
   are the fractional amount. Since we only have 0.5 degree resolution,
   the bottom 7 bits will always be zero */
#define TEMP23_FROM_REG(val)	((val) / 128 * 500)
#define TEMP23_TO_REG(val)	((val) <= -128000 ? 0x8000 : \
				 (val) >= 127500 ? 0x7F80 : \
				 (val) < 0 ? ((val) - 250) / 500 * 128 : \
				 ((val) + 250) / 500 * 128)


#define BEEP_MASK_TO_REG(val)		((val) & 0xffffff)
#define BEEP_MASK_FROM_REG(val)		((val) & 0xffffff)

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

static u8 div_to_reg(int nr, long val)
{
	int i;
	int max;

	/* first three fan's divisor max out at 8, rest max out at 128 */
	max = (nr < 3) ? 8 : 128;
	val = SENSORS_LIMIT(val, 1, max) >> 1;
	for (i = 0; i < 7; i++) {
		if (val == 0)
			break;
		val >>= 1;
	}
	return (u8) i;
}

struct w83791d_data {
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	struct device *hwmon_dev;
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	struct mutex update_lock;

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

	/* array of 2 pointers to subclients */
	struct i2c_client *lm75[2];

	/* volts */
	u8 in[NUMBER_OF_VIN];		/* Register value */
	u8 in_max[NUMBER_OF_VIN];	/* Register value */
	u8 in_min[NUMBER_OF_VIN];	/* Register value */

	/* fans */
	u8 fan[NUMBER_OF_FANIN];	/* Register value */
	u8 fan_min[NUMBER_OF_FANIN];	/* Register value */
	u8 fan_div[NUMBER_OF_FANIN];	/* Register encoding, shifted right */

	/* Temperature sensors */

	s8 temp1[3];		/* current, over, thyst */
	s16 temp_add[2][3];	/* fixed point value. Top 8 bits are the
				   integral part, bottom 8 bits are the
				   fractional part. We only use the top
				   9 bits as the resolution is only
				   to the 0.5 degree C...
				   two sensors with three values
				   (cur, over, hyst)  */

	/* Misc */
	u32 alarms;		/* realtime status register encoding,combined */
	u8 beep_enable;		/* Global beep enable */
	u32 beep_mask;		/* Mask off specific beeps */
	u8 vid;			/* Register encoding, combined */
	u8 vrm;			/* hwmon-vid */
};

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static int w83791d_probe(struct i2c_client *client,
			 const struct i2c_device_id *id);
static int w83791d_detect(struct i2c_client *client, int kind,
			  struct i2c_board_info *info);
static int w83791d_remove(struct i2c_client *client);
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static int w83791d_read(struct i2c_client *client, u8 register);
static int w83791d_write(struct i2c_client *client, u8 register, u8 value);
static struct w83791d_data *w83791d_update_device(struct device *dev);

#ifdef DEBUG
static void w83791d_print_debug(struct w83791d_data *data, struct device *dev);
#endif

static void w83791d_init_client(struct i2c_client *client);

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static const struct i2c_device_id w83791d_id[] = {
	{ "w83791d", w83791d },
	{ }
};
MODULE_DEVICE_TABLE(i2c, w83791d_id);

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static struct i2c_driver w83791d_driver = {
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	.class		= I2C_CLASS_HWMON,
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	.driver = {
		.name = "w83791d",
	},
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	.probe		= w83791d_probe,
	.remove		= w83791d_remove,
	.id_table	= w83791d_id,
	.detect		= w83791d_detect,
	.address_data	= &addr_data,
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};

/* following are the sysfs callback functions */
#define show_in_reg(reg) \
static ssize_t show_##reg(struct device *dev, struct device_attribute *attr, \
			char *buf) \
{ \
	struct sensor_device_attribute *sensor_attr = \
						to_sensor_dev_attr(attr); \
	struct w83791d_data *data = w83791d_update_device(dev); \
	int nr = sensor_attr->index; \
	return sprintf(buf,"%d\n", 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, \
				struct device_attribute *attr, \
				const char *buf, size_t count) \
{ \
	struct sensor_device_attribute *sensor_attr = \
						to_sensor_dev_attr(attr); \
	struct i2c_client *client = to_i2c_client(dev); \
	struct w83791d_data *data = i2c_get_clientdata(client); \
	unsigned long val = simple_strtoul(buf, NULL, 10); \
	int nr = sensor_attr->index; \
	 \
	mutex_lock(&data->update_lock); \
	data->in_##reg[nr] = IN_TO_REG(val); \
	w83791d_write(client, W83791D_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);

static struct sensor_device_attribute sda_in_input[] = {
	SENSOR_ATTR(in0_input, S_IRUGO, show_in, NULL, 0),
	SENSOR_ATTR(in1_input, S_IRUGO, show_in, NULL, 1),
	SENSOR_ATTR(in2_input, S_IRUGO, show_in, NULL, 2),
	SENSOR_ATTR(in3_input, S_IRUGO, show_in, NULL, 3),
	SENSOR_ATTR(in4_input, S_IRUGO, show_in, NULL, 4),
	SENSOR_ATTR(in5_input, S_IRUGO, show_in, NULL, 5),
	SENSOR_ATTR(in6_input, S_IRUGO, show_in, NULL, 6),
	SENSOR_ATTR(in7_input, S_IRUGO, show_in, NULL, 7),
	SENSOR_ATTR(in8_input, S_IRUGO, show_in, NULL, 8),
	SENSOR_ATTR(in9_input, S_IRUGO, show_in, NULL, 9),
};

static struct sensor_device_attribute sda_in_min[] = {
	SENSOR_ATTR(in0_min, S_IWUSR | S_IRUGO, show_in_min, store_in_min, 0),
	SENSOR_ATTR(in1_min, S_IWUSR | S_IRUGO, show_in_min, store_in_min, 1),
	SENSOR_ATTR(in2_min, S_IWUSR | S_IRUGO, show_in_min, store_in_min, 2),
	SENSOR_ATTR(in3_min, S_IWUSR | S_IRUGO, show_in_min, store_in_min, 3),
	SENSOR_ATTR(in4_min, S_IWUSR | S_IRUGO, show_in_min, store_in_min, 4),
	SENSOR_ATTR(in5_min, S_IWUSR | S_IRUGO, show_in_min, store_in_min, 5),
	SENSOR_ATTR(in6_min, S_IWUSR | S_IRUGO, show_in_min, store_in_min, 6),
	SENSOR_ATTR(in7_min, S_IWUSR | S_IRUGO, show_in_min, store_in_min, 7),
	SENSOR_ATTR(in8_min, S_IWUSR | S_IRUGO, show_in_min, store_in_min, 8),
	SENSOR_ATTR(in9_min, S_IWUSR | S_IRUGO, show_in_min, store_in_min, 9),
};

static struct sensor_device_attribute sda_in_max[] = {
	SENSOR_ATTR(in0_max, S_IWUSR | S_IRUGO, show_in_max, store_in_max, 0),
	SENSOR_ATTR(in1_max, S_IWUSR | S_IRUGO, show_in_max, store_in_max, 1),
	SENSOR_ATTR(in2_max, S_IWUSR | S_IRUGO, show_in_max, store_in_max, 2),
	SENSOR_ATTR(in3_max, S_IWUSR | S_IRUGO, show_in_max, store_in_max, 3),
	SENSOR_ATTR(in4_max, S_IWUSR | S_IRUGO, show_in_max, store_in_max, 4),
	SENSOR_ATTR(in5_max, S_IWUSR | S_IRUGO, show_in_max, store_in_max, 5),
	SENSOR_ATTR(in6_max, S_IWUSR | S_IRUGO, show_in_max, store_in_max, 6),
	SENSOR_ATTR(in7_max, S_IWUSR | S_IRUGO, show_in_max, store_in_max, 7),
	SENSOR_ATTR(in8_max, S_IWUSR | S_IRUGO, show_in_max, store_in_max, 8),
	SENSOR_ATTR(in9_max, S_IWUSR | S_IRUGO, show_in_max, store_in_max, 9),
};

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static ssize_t show_beep(struct device *dev, struct device_attribute *attr,
			char *buf)
{
	struct sensor_device_attribute *sensor_attr =
						to_sensor_dev_attr(attr);
	struct w83791d_data *data = w83791d_update_device(dev);
	int bitnr = sensor_attr->index;

	return sprintf(buf, "%d\n", (data->beep_mask >> bitnr) & 1);
}

static ssize_t store_beep(struct device *dev, struct device_attribute *attr,
			const char *buf, size_t count)
{
	struct sensor_device_attribute *sensor_attr =
						to_sensor_dev_attr(attr);
	struct i2c_client *client = to_i2c_client(dev);
	struct w83791d_data *data = i2c_get_clientdata(client);
	int bitnr = sensor_attr->index;
	int bytenr = bitnr / 8;
	long val = simple_strtol(buf, NULL, 10) ? 1 : 0;

	mutex_lock(&data->update_lock);

	data->beep_mask &= ~(0xff << (bytenr * 8));
	data->beep_mask |= w83791d_read(client, W83791D_REG_BEEP_CTRL[bytenr])
		<< (bytenr * 8);

	data->beep_mask &= ~(1 << bitnr);
	data->beep_mask |= val << bitnr;

	w83791d_write(client, W83791D_REG_BEEP_CTRL[bytenr],
		(data->beep_mask >> (bytenr * 8)) & 0xff);

	mutex_unlock(&data->update_lock);

	return count;
}

static ssize_t show_alarm(struct device *dev, struct device_attribute *attr,
			char *buf)
{
	struct sensor_device_attribute *sensor_attr =
						to_sensor_dev_attr(attr);
	struct w83791d_data *data = w83791d_update_device(dev);
	int bitnr = sensor_attr->index;

	return sprintf(buf, "%d\n", (data->alarms >> bitnr) & 1);
}

/* Note: The bitmask for the beep enable/disable is different than
   the bitmask for the alarm. */
static struct sensor_device_attribute sda_in_beep[] = {
	SENSOR_ATTR(in0_beep, S_IWUSR | S_IRUGO, show_beep, store_beep, 0),
	SENSOR_ATTR(in1_beep, S_IWUSR | S_IRUGO, show_beep, store_beep, 13),
	SENSOR_ATTR(in2_beep, S_IWUSR | S_IRUGO, show_beep, store_beep, 2),
	SENSOR_ATTR(in3_beep, S_IWUSR | S_IRUGO, show_beep, store_beep, 3),
	SENSOR_ATTR(in4_beep, S_IWUSR | S_IRUGO, show_beep, store_beep, 8),
	SENSOR_ATTR(in5_beep, S_IWUSR | S_IRUGO, show_beep, store_beep, 9),
	SENSOR_ATTR(in6_beep, S_IWUSR | S_IRUGO, show_beep, store_beep, 10),
	SENSOR_ATTR(in7_beep, S_IWUSR | S_IRUGO, show_beep, store_beep, 16),
	SENSOR_ATTR(in8_beep, S_IWUSR | S_IRUGO, show_beep, store_beep, 17),
	SENSOR_ATTR(in9_beep, S_IWUSR | S_IRUGO, show_beep, store_beep, 14),
};

static struct sensor_device_attribute sda_in_alarm[] = {
	SENSOR_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0),
	SENSOR_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 1),
	SENSOR_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 2),
	SENSOR_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 3),
	SENSOR_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 8),
	SENSOR_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 9),
	SENSOR_ATTR(in6_alarm, S_IRUGO, show_alarm, NULL, 10),
	SENSOR_ATTR(in7_alarm, S_IRUGO, show_alarm, NULL, 19),
	SENSOR_ATTR(in8_alarm, S_IRUGO, show_alarm, NULL, 20),
	SENSOR_ATTR(in9_alarm, S_IRUGO, show_alarm, NULL, 14),
};

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#define show_fan_reg(reg) \
static ssize_t show_##reg(struct device *dev, struct device_attribute *attr, \
				char *buf) \
{ \
	struct sensor_device_attribute *sensor_attr = \
						to_sensor_dev_attr(attr); \
	struct w83791d_data *data = w83791d_update_device(dev); \
	int nr = sensor_attr->index; \
	return sprintf(buf,"%d\n", \
		FAN_FROM_REG(data->reg[nr], DIV_FROM_REG(data->fan_div[nr]))); \
}

show_fan_reg(fan);
show_fan_reg(fan_min);

static ssize_t store_fan_min(struct device *dev, struct device_attribute *attr,
				const char *buf, size_t count)
{
	struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
	struct i2c_client *client = to_i2c_client(dev);
	struct w83791d_data *data = i2c_get_clientdata(client);
	unsigned long val = simple_strtoul(buf, NULL, 10);
	int nr = sensor_attr->index;

	mutex_lock(&data->update_lock);
	data->fan_min[nr] = fan_to_reg(val, DIV_FROM_REG(data->fan_div[nr]));
	w83791d_write(client, W83791D_REG_FAN_MIN[nr], data->fan_min[nr]);
	mutex_unlock(&data->update_lock);

	return count;
}

static ssize_t show_fan_div(struct device *dev, struct device_attribute *attr,
				char *buf)
{
	struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
	int nr = sensor_attr->index;
	struct w83791d_data *data = w83791d_update_device(dev);
	return sprintf(buf, "%u\n", DIV_FROM_REG(data->fan_div[nr]));
}

/* 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 suprise; the user doesn't expect the fan minimum to change just
   because the divisor changed. */
static ssize_t store_fan_div(struct device *dev, struct device_attribute *attr,
				const char *buf, size_t count)
{
	struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
	struct i2c_client *client = to_i2c_client(dev);
	struct w83791d_data *data = i2c_get_clientdata(client);
	int nr = sensor_attr->index;
	unsigned long min;
	u8 tmp_fan_div;
	u8 fan_div_reg;
	int indx = 0;
	u8 keep_mask = 0;
	u8 new_shift = 0;

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

	mutex_lock(&data->update_lock);
	data->fan_div[nr] = div_to_reg(nr, simple_strtoul(buf, NULL, 10));

	switch (nr) {
	case 0:
		indx = 0;
		keep_mask = 0xcf;
		new_shift = 4;
		break;
	case 1:
		indx = 0;
		keep_mask = 0x3f;
		new_shift = 6;
		break;
	case 2:
		indx = 1;
		keep_mask = 0x3f;
		new_shift = 6;
		break;
	case 3:
		indx = 2;
		keep_mask = 0xf8;
		new_shift = 0;
		break;
	case 4:
		indx = 2;
		keep_mask = 0x8f;
		new_shift = 4;
		break;
#ifdef DEBUG
	default:
		dev_warn(dev, "store_fan_div: Unexpected nr seen: %d\n", nr);
		count = -EINVAL;
		goto err_exit;
#endif
	}

	fan_div_reg = w83791d_read(client, W83791D_REG_FAN_DIV[indx])
			& keep_mask;
	tmp_fan_div = (data->fan_div[nr] << new_shift) & ~keep_mask;

	w83791d_write(client, W83791D_REG_FAN_DIV[indx],
				fan_div_reg | tmp_fan_div);

	/* Restore fan_min */
	data->fan_min[nr] = fan_to_reg(min, DIV_FROM_REG(data->fan_div[nr]));
	w83791d_write(client, W83791D_REG_FAN_MIN[nr], data->fan_min[nr]);

#ifdef DEBUG
err_exit:
#endif
	mutex_unlock(&data->update_lock);

	return count;
}

static struct sensor_device_attribute sda_fan_input[] = {
	SENSOR_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0),
	SENSOR_ATTR(fan2_input, S_IRUGO, show_fan, NULL, 1),
	SENSOR_ATTR(fan3_input, S_IRUGO, show_fan, NULL, 2),
	SENSOR_ATTR(fan4_input, S_IRUGO, show_fan, NULL, 3),
	SENSOR_ATTR(fan5_input, S_IRUGO, show_fan, NULL, 4),
};

static struct sensor_device_attribute sda_fan_min[] = {
	SENSOR_ATTR(fan1_min, S_IWUSR | S_IRUGO,
			show_fan_min, store_fan_min, 0),
	SENSOR_ATTR(fan2_min, S_IWUSR | S_IRUGO,
			show_fan_min, store_fan_min, 1),
	SENSOR_ATTR(fan3_min, S_IWUSR | S_IRUGO,
			show_fan_min, store_fan_min, 2),
	SENSOR_ATTR(fan4_min, S_IWUSR | S_IRUGO,
			show_fan_min, store_fan_min, 3),
	SENSOR_ATTR(fan5_min, S_IWUSR | S_IRUGO,
			show_fan_min, store_fan_min, 4),
};

static struct sensor_device_attribute sda_fan_div[] = {
	SENSOR_ATTR(fan1_div, S_IWUSR | S_IRUGO,
			show_fan_div, store_fan_div, 0),
	SENSOR_ATTR(fan2_div, S_IWUSR | S_IRUGO,
			show_fan_div, store_fan_div, 1),
	SENSOR_ATTR(fan3_div, S_IWUSR | S_IRUGO,
			show_fan_div, store_fan_div, 2),
	SENSOR_ATTR(fan4_div, S_IWUSR | S_IRUGO,
			show_fan_div, store_fan_div, 3),
	SENSOR_ATTR(fan5_div, S_IWUSR | S_IRUGO,
			show_fan_div, store_fan_div, 4),
};

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static struct sensor_device_attribute sda_fan_beep[] = {
	SENSOR_ATTR(fan1_beep, S_IWUSR | S_IRUGO, show_beep, store_beep, 6),
	SENSOR_ATTR(fan2_beep, S_IWUSR | S_IRUGO, show_beep, store_beep, 7),
	SENSOR_ATTR(fan3_beep, S_IWUSR | S_IRUGO, show_beep, store_beep, 11),
	SENSOR_ATTR(fan4_beep, S_IWUSR | S_IRUGO, show_beep, store_beep, 21),
	SENSOR_ATTR(fan5_beep, S_IWUSR | S_IRUGO, show_beep, store_beep, 22),
};

static struct sensor_device_attribute sda_fan_alarm[] = {
	SENSOR_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 6),
	SENSOR_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 7),
	SENSOR_ATTR(fan3_alarm, S_IRUGO, show_alarm, NULL, 11),
	SENSOR_ATTR(fan4_alarm, S_IRUGO, show_alarm, NULL, 21),
	SENSOR_ATTR(fan5_alarm, S_IRUGO, show_alarm, NULL, 22),
};

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/* read/write the temperature1, includes measured value and limits */
static ssize_t show_temp1(struct device *dev, struct device_attribute *devattr,
				char *buf)
{
	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
	struct w83791d_data *data = w83791d_update_device(dev);
	return sprintf(buf, "%d\n", TEMP1_FROM_REG(data->temp1[attr->index]));
}

static ssize_t store_temp1(struct device *dev, struct device_attribute *devattr,
				const char *buf, size_t count)
{
	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
	struct i2c_client *client = to_i2c_client(dev);
	struct w83791d_data *data = i2c_get_clientdata(client);
	long val = simple_strtol(buf, NULL, 10);
	int nr = attr->index;

	mutex_lock(&data->update_lock);
	data->temp1[nr] = TEMP1_TO_REG(val);
	w83791d_write(client, W83791D_REG_TEMP1[nr], data->temp1[nr]);
	mutex_unlock(&data->update_lock);
	return count;
}

/* read/write temperature2-3, includes measured value and limits */
static ssize_t show_temp23(struct device *dev, struct device_attribute *devattr,
				char *buf)
{
	struct sensor_device_attribute_2 *attr = to_sensor_dev_attr_2(devattr);
	struct w83791d_data *data = w83791d_update_device(dev);
	int nr = attr->nr;
	int index = attr->index;
	return sprintf(buf, "%d\n", TEMP23_FROM_REG(data->temp_add[nr][index]));
}

static ssize_t store_temp23(struct device *dev,
				struct device_attribute *devattr,
				const char *buf, size_t count)
{
	struct sensor_device_attribute_2 *attr = to_sensor_dev_attr_2(devattr);
	struct i2c_client *client = to_i2c_client(dev);
	struct w83791d_data *data = i2c_get_clientdata(client);
	long val = simple_strtol(buf, NULL, 10);
	int nr = attr->nr;
	int index = attr->index;

	mutex_lock(&data->update_lock);
	data->temp_add[nr][index] = TEMP23_TO_REG(val);
	w83791d_write(client, W83791D_REG_TEMP_ADD[nr][index * 2],
				data->temp_add[nr][index] >> 8);
	w83791d_write(client, W83791D_REG_TEMP_ADD[nr][index * 2 + 1],
				data->temp_add[nr][index] & 0x80);
	mutex_unlock(&data->update_lock);

	return count;
}

static struct sensor_device_attribute_2 sda_temp_input[] = {
	SENSOR_ATTR_2(temp1_input, S_IRUGO, show_temp1, NULL, 0, 0),
	SENSOR_ATTR_2(temp2_input, S_IRUGO, show_temp23, NULL, 0, 0),
	SENSOR_ATTR_2(temp3_input, S_IRUGO, show_temp23, NULL, 1, 0),
};

static struct sensor_device_attribute_2 sda_temp_max[] = {
	SENSOR_ATTR_2(temp1_max, S_IRUGO | S_IWUSR,
			show_temp1, store_temp1, 0, 1),
	SENSOR_ATTR_2(temp2_max, S_IRUGO | S_IWUSR,
			show_temp23, store_temp23, 0, 1),
	SENSOR_ATTR_2(temp3_max, S_IRUGO | S_IWUSR,
			show_temp23, store_temp23, 1, 1),
};

static struct sensor_device_attribute_2 sda_temp_max_hyst[] = {
	SENSOR_ATTR_2(temp1_max_hyst, S_IRUGO | S_IWUSR,
			show_temp1, store_temp1, 0, 2),
	SENSOR_ATTR_2(temp2_max_hyst, S_IRUGO | S_IWUSR,
			show_temp23, store_temp23, 0, 2),
	SENSOR_ATTR_2(temp3_max_hyst, S_IRUGO | S_IWUSR,
			show_temp23, store_temp23, 1, 2),
};

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/* Note: The bitmask for the beep enable/disable is different than
   the bitmask for the alarm. */
static struct sensor_device_attribute sda_temp_beep[] = {
	SENSOR_ATTR(temp1_beep, S_IWUSR | S_IRUGO, show_beep, store_beep, 4),
	SENSOR_ATTR(temp2_beep, S_IWUSR | S_IRUGO, show_beep, store_beep, 5),
	SENSOR_ATTR(temp3_beep, S_IWUSR | S_IRUGO, show_beep, store_beep, 1),
};

static struct sensor_device_attribute sda_temp_alarm[] = {
	SENSOR_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 4),
	SENSOR_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 5),
	SENSOR_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL, 13),
};
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/* get reatime status of all sensors items: voltage, temp, fan */
static ssize_t show_alarms_reg(struct device *dev,
				struct device_attribute *attr, char *buf)
{
	struct w83791d_data *data = w83791d_update_device(dev);
	return sprintf(buf, "%u\n", data->alarms);
}

static DEVICE_ATTR(alarms, S_IRUGO, show_alarms_reg, NULL);

/* Beep control */

#define GLOBAL_BEEP_ENABLE_SHIFT	15
#define GLOBAL_BEEP_ENABLE_MASK		(1 << GLOBAL_BEEP_ENABLE_SHIFT)

static ssize_t show_beep_enable(struct device *dev,
				struct device_attribute *attr, char *buf)
{
	struct w83791d_data *data = w83791d_update_device(dev);
	return sprintf(buf, "%d\n", data->beep_enable);
}

static ssize_t show_beep_mask(struct device *dev,
				struct device_attribute *attr, char *buf)
{
	struct w83791d_data *data = w83791d_update_device(dev);
	return sprintf(buf, "%d\n", BEEP_MASK_FROM_REG(data->beep_mask));
}


static ssize_t store_beep_mask(struct device *dev,
				struct device_attribute *attr,
				const char *buf, size_t count)
{
	struct i2c_client *client = to_i2c_client(dev);
	struct w83791d_data *data = i2c_get_clientdata(client);
	long val = simple_strtol(buf, NULL, 10);
	int i;

	mutex_lock(&data->update_lock);

	/* The beep_enable state overrides any enabling request from
	   the masks */
	data->beep_mask = BEEP_MASK_TO_REG(val) & ~GLOBAL_BEEP_ENABLE_MASK;
	data->beep_mask |= (data->beep_enable << GLOBAL_BEEP_ENABLE_SHIFT);

	val = data->beep_mask;

	for (i = 0; i < 3; i++) {
		w83791d_write(client, W83791D_REG_BEEP_CTRL[i], (val & 0xff));
		val >>= 8;
	}

	mutex_unlock(&data->update_lock);

	return count;
}

static ssize_t store_beep_enable(struct device *dev,
				struct device_attribute *attr,
				const char *buf, size_t count)
{
	struct i2c_client *client = to_i2c_client(dev);
	struct w83791d_data *data = i2c_get_clientdata(client);
	long val = simple_strtol(buf, NULL, 10);

	mutex_lock(&data->update_lock);

	data->beep_enable = val ? 1 : 0;

	/* Keep the full mask value in sync with the current enable */
	data->beep_mask &= ~GLOBAL_BEEP_ENABLE_MASK;
	data->beep_mask |= (data->beep_enable << GLOBAL_BEEP_ENABLE_SHIFT);

	/* The global control is in the second beep control register
	   so only need to update that register */
	val = (data->beep_mask >> 8) & 0xff;

	w83791d_write(client, W83791D_REG_BEEP_CTRL[1], val);

	mutex_unlock(&data->update_lock);

	return count;
}

static struct sensor_device_attribute sda_beep_ctrl[] = {
	SENSOR_ATTR(beep_enable, S_IRUGO | S_IWUSR,
			show_beep_enable, store_beep_enable, 0),
	SENSOR_ATTR(beep_mask, S_IRUGO | S_IWUSR,
			show_beep_mask, store_beep_mask, 1)
};

/* cpu voltage regulation information */
static ssize_t show_vid_reg(struct device *dev,
				struct device_attribute *attr, char *buf)
{
	struct w83791d_data *data = w83791d_update_device(dev);
	return sprintf(buf, "%d\n", 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)
{
847
	struct w83791d_data *data = dev_get_drvdata(dev);
848 849 850 851 852 853 854
	return sprintf(buf, "%d\n", data->vrm);
}

static ssize_t store_vrm_reg(struct device *dev,
				struct device_attribute *attr,
				const char *buf, size_t count)
{
855
	struct w83791d_data *data = dev_get_drvdata(dev);
856 857 858 859

	/* No lock needed as vrm is internal to the driver
	   (not read from a chip register) and so is not
	   updated in w83791d_update_device() */
860
	data->vrm = simple_strtoul(buf, NULL, 10);
861 862 863 864 865 866

	return count;
}

static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm_reg, store_vrm_reg);

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#define IN_UNIT_ATTRS(X) \
	&sda_in_input[X].dev_attr.attr, \
	&sda_in_min[X].dev_attr.attr,   \
870 871 872
	&sda_in_max[X].dev_attr.attr,   \
	&sda_in_beep[X].dev_attr.attr,  \
	&sda_in_alarm[X].dev_attr.attr
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#define FAN_UNIT_ATTRS(X) \
	&sda_fan_input[X].dev_attr.attr,        \
	&sda_fan_min[X].dev_attr.attr,          \
877 878 879
	&sda_fan_div[X].dev_attr.attr,          \
	&sda_fan_beep[X].dev_attr.attr,         \
	&sda_fan_alarm[X].dev_attr.attr
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#define TEMP_UNIT_ATTRS(X) \
	&sda_temp_input[X].dev_attr.attr,       \
	&sda_temp_max[X].dev_attr.attr,         \
884 885 886
	&sda_temp_max_hyst[X].dev_attr.attr,    \
	&sda_temp_beep[X].dev_attr.attr,        \
	&sda_temp_alarm[X].dev_attr.attr
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static struct attribute *w83791d_attributes[] = {
	IN_UNIT_ATTRS(0),
	IN_UNIT_ATTRS(1),
	IN_UNIT_ATTRS(2),
	IN_UNIT_ATTRS(3),
	IN_UNIT_ATTRS(4),
	IN_UNIT_ATTRS(5),
	IN_UNIT_ATTRS(6),
	IN_UNIT_ATTRS(7),
	IN_UNIT_ATTRS(8),
	IN_UNIT_ATTRS(9),
	FAN_UNIT_ATTRS(0),
	FAN_UNIT_ATTRS(1),
	FAN_UNIT_ATTRS(2),
	FAN_UNIT_ATTRS(3),
	FAN_UNIT_ATTRS(4),
	TEMP_UNIT_ATTRS(0),
	TEMP_UNIT_ATTRS(1),
	TEMP_UNIT_ATTRS(2),
	&dev_attr_alarms.attr,
	&sda_beep_ctrl[0].dev_attr.attr,
	&sda_beep_ctrl[1].dev_attr.attr,
	&dev_attr_cpu0_vid.attr,
	&dev_attr_vrm.attr,
	NULL
};

static const struct attribute_group w83791d_group = {
	.attrs = w83791d_attributes,
};

919

920
static int w83791d_detect_subclients(struct i2c_client *client)
921
{
922
	struct i2c_adapter *adapter = client->adapter;
923
	struct w83791d_data *data = i2c_get_clientdata(client);
924
	int address = client->addr;
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	int i, id, err;
	u8 val;

	id = i2c_adapter_id(adapter);
	if (force_subclients[0] == id && force_subclients[1] == address) {
		for (i = 2; i <= 3; i++) {
			if (force_subclients[i] < 0x48 ||
			    force_subclients[i] > 0x4f) {
				dev_err(&client->dev,
					"invalid subclient "
					"address %d; must be 0x48-0x4f\n",
					force_subclients[i]);
				err = -ENODEV;
				goto error_sc_0;
			}
		}
		w83791d_write(client, W83791D_REG_I2C_SUBADDR,
					(force_subclients[2] & 0x07) |
					((force_subclients[3] & 0x07) << 4));
	}

	val = w83791d_read(client, W83791D_REG_I2C_SUBADDR);
	if (!(val & 0x08)) {
948
		data->lm75[0] = i2c_new_dummy(adapter, 0x48 + (val & 0x7));
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	}
	if (!(val & 0x80)) {
		if ((data->lm75[0] != NULL) &&
				((val & 0x7) == ((val >> 4) & 0x7))) {
			dev_err(&client->dev,
				"duplicate addresses 0x%x, "
				"use force_subclient\n",
				data->lm75[0]->addr);
			err = -ENODEV;
			goto error_sc_1;
		}
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		data->lm75[1] = i2c_new_dummy(adapter,
					      0x48 + ((val >> 4) & 0x7));
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	}

	return 0;

/* Undo inits in case of errors */

error_sc_1:
969 970
	if (data->lm75[0] != NULL)
		i2c_unregister_device(data->lm75[0]);
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error_sc_0:
	return err;
}


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/* Return 0 if detection is successful, -ENODEV otherwise */
static int w83791d_detect(struct i2c_client *client, int kind,
			  struct i2c_board_info *info)
979
{
980 981 982
	struct i2c_adapter *adapter = client->adapter;
	int val1, val2;
	unsigned short address = client->addr;
983 984

	if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) {
985
		return -ENODEV;
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	}

	/* The w83791d may be stuck in some other bank than bank 0. This may
	   make reading other information impossible. Specify a force=...
	   parameter, and the Winbond will be reset to the right bank. */
	if (kind < 0) {
		if (w83791d_read(client, W83791D_REG_CONFIG) & 0x80) {
993
			return -ENODEV;
994 995 996 997 998 999 1000 1001
		}
		val1 = w83791d_read(client, W83791D_REG_BANK);
		val2 = w83791d_read(client, W83791D_REG_CHIPMAN);
		/* Check for Winbond ID if in bank 0 */
		if (!(val1 & 0x07)) {
			/* yes it is Bank0 */
			if (((!(val1 & 0x80)) && (val2 != 0xa3)) ||
			    ((val1 & 0x80) && (val2 != 0x5c))) {
1002
				return -ENODEV;
1003 1004 1005 1006 1007
			}
		}
		/* If Winbond chip, address of chip and W83791D_REG_I2C_ADDR
		   should match */
		if (w83791d_read(client, W83791D_REG_I2C_ADDR) != address) {
1008
			return -ENODEV;
1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022
		}
	}

	/* We either have a force parameter or we have reason to
	   believe it is a Winbond chip. Either way, we want bank 0 and
	   Vendor ID high byte */
	val1 = w83791d_read(client, W83791D_REG_BANK) & 0x78;
	w83791d_write(client, W83791D_REG_BANK, val1 | 0x80);

	/* Verify it is a Winbond w83791d */
	if (kind <= 0) {
		/* get vendor ID */
		val2 = w83791d_read(client, W83791D_REG_CHIPMAN);
		if (val2 != 0x5c) {	/* the vendor is NOT Winbond */
1023
			return -ENODEV;
1024 1025 1026 1027 1028 1029
		}
		val1 = w83791d_read(client, W83791D_REG_WCHIPID);
		if (val1 == 0x71) {
			kind = w83791d;
		} else {
			if (kind == 0)
1030
				dev_warn(&adapter->dev,
1031 1032 1033 1034
					"w83791d: Ignoring 'force' parameter "
					"for unknown chip at adapter %d, "
					"address 0x%02x\n",
					i2c_adapter_id(adapter), address);
1035
			return -ENODEV;
1036 1037 1038
		}
	}

1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049
	strlcpy(info->type, "w83791d", I2C_NAME_SIZE);

	return 0;
}

static int w83791d_probe(struct i2c_client *client,
			 const struct i2c_device_id *id)
{
	struct w83791d_data *data;
	struct device *dev = &client->dev;
	int i, val1, err;
1050 1051 1052 1053 1054 1055 1056

#ifdef DEBUG
	val1 = w83791d_read(client, W83791D_REG_DID_VID4);
	dev_dbg(dev, "Device ID version: %d.%d (0x%02x)\n",
			(val1 >> 5) & 0x07, (val1 >> 1) & 0x0f, val1);
#endif

1057 1058 1059 1060 1061
	data = kzalloc(sizeof(struct w83791d_data), GFP_KERNEL);
	if (!data) {
		err = -ENOMEM;
		goto error0;
	}
1062

1063 1064
	i2c_set_clientdata(client, data);
	mutex_init(&data->update_lock);
1065

1066 1067 1068
	err = w83791d_detect_subclients(client);
	if (err)
		goto error1;
1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079

	/* Initialize the chip */
	w83791d_init_client(client);

	/* If the fan_div is changed, make sure there is a rational
	   fan_min in place */
	for (i = 0; i < NUMBER_OF_FANIN; i++) {
		data->fan_min[i] = w83791d_read(client, W83791D_REG_FAN_MIN[i]);
	}

	/* Register sysfs hooks */
J
Jim Cromie 已提交
1080 1081 1082 1083
	if ((err = sysfs_create_group(&client->dev.kobj, &w83791d_group)))
		goto error3;

	/* Everything is ready, now register the working device */
1084 1085 1086
	data->hwmon_dev = hwmon_device_register(dev);
	if (IS_ERR(data->hwmon_dev)) {
		err = PTR_ERR(data->hwmon_dev);
J
Jim Cromie 已提交
1087
		goto error4;
1088 1089 1090 1091
	}

	return 0;

J
Jim Cromie 已提交
1092 1093
error4:
	sysfs_remove_group(&client->dev.kobj, &w83791d_group);
1094
error3:
1095 1096 1097 1098
	if (data->lm75[0] != NULL)
		i2c_unregister_device(data->lm75[0]);
	if (data->lm75[1] != NULL)
		i2c_unregister_device(data->lm75[1]);
1099 1100 1101 1102 1103 1104
error1:
	kfree(data);
error0:
	return err;
}

1105
static int w83791d_remove(struct i2c_client *client)
1106 1107 1108
{
	struct w83791d_data *data = i2c_get_clientdata(client);

1109 1110
	hwmon_device_unregister(data->hwmon_dev);
	sysfs_remove_group(&client->dev.kobj, &w83791d_group);
1111

1112 1113 1114 1115
	if (data->lm75[0] != NULL)
		i2c_unregister_device(data->lm75[0]);
	if (data->lm75[1] != NULL)
		i2c_unregister_device(data->lm75[1]);
1116

1117
	kfree(data);
1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250
	return 0;
}

static void w83791d_init_client(struct i2c_client *client)
{
	struct w83791d_data *data = i2c_get_clientdata(client);
	u8 tmp;
	u8 old_beep;

	/* The difference between reset and init is that reset
	   does a hard reset of the chip via index 0x40, bit 7,
	   but init simply forces certain registers to have "sane"
	   values. The hope is that the BIOS has done the right
	   thing (which is why the default is reset=0, init=0),
	   but if not, reset is the hard hammer and init
	   is the soft mallet both of which are trying to whack
	   things into place...
	   NOTE: The data sheet makes a distinction between
	   "power on defaults" and "reset by MR". As far as I can tell,
	   the hard reset puts everything into a power-on state so I'm
	   not sure what "reset by MR" means or how it can happen.
	   */
	if (reset || init) {
		/* keep some BIOS settings when we... */
		old_beep = w83791d_read(client, W83791D_REG_BEEP_CONFIG);

		if (reset) {
			/* ... reset the chip and ... */
			w83791d_write(client, W83791D_REG_CONFIG, 0x80);
		}

		/* ... disable power-on abnormal beep */
		w83791d_write(client, W83791D_REG_BEEP_CONFIG, old_beep | 0x80);

		/* disable the global beep (not done by hard reset) */
		tmp = w83791d_read(client, W83791D_REG_BEEP_CTRL[1]);
		w83791d_write(client, W83791D_REG_BEEP_CTRL[1], tmp & 0xef);

		if (init) {
			/* Make sure monitoring is turned on for add-ons */
			tmp = w83791d_read(client, W83791D_REG_TEMP2_CONFIG);
			if (tmp & 1) {
				w83791d_write(client, W83791D_REG_TEMP2_CONFIG,
					tmp & 0xfe);
			}

			tmp = w83791d_read(client, W83791D_REG_TEMP3_CONFIG);
			if (tmp & 1) {
				w83791d_write(client, W83791D_REG_TEMP3_CONFIG,
					tmp & 0xfe);
			}

			/* Start monitoring */
			tmp = w83791d_read(client, W83791D_REG_CONFIG) & 0xf7;
			w83791d_write(client, W83791D_REG_CONFIG, tmp | 0x01);
		}
	}

	data->vrm = vid_which_vrm();
}

static struct w83791d_data *w83791d_update_device(struct device *dev)
{
	struct i2c_client *client = to_i2c_client(dev);
	struct w83791d_data *data = i2c_get_clientdata(client);
	int i, j;
	u8 reg_array_tmp[3];

	mutex_lock(&data->update_lock);

	if (time_after(jiffies, data->last_updated + (HZ * 3))
			|| !data->valid) {
		dev_dbg(dev, "Starting w83791d device update\n");

		/* Update the voltages measured value and limits */
		for (i = 0; i < NUMBER_OF_VIN; i++) {
			data->in[i] = w83791d_read(client,
						W83791D_REG_IN[i]);
			data->in_max[i] = w83791d_read(client,
						W83791D_REG_IN_MAX[i]);
			data->in_min[i] = w83791d_read(client,
						W83791D_REG_IN_MIN[i]);
		}

		/* Update the fan counts and limits */
		for (i = 0; i < NUMBER_OF_FANIN; i++) {
			/* Update the Fan measured value and limits */
			data->fan[i] = w83791d_read(client,
						W83791D_REG_FAN[i]);
			data->fan_min[i] = w83791d_read(client,
						W83791D_REG_FAN_MIN[i]);
		}

		/* Update the fan divisor */
		for (i = 0; i < 3; i++) {
			reg_array_tmp[i] = w83791d_read(client,
						W83791D_REG_FAN_DIV[i]);
		}
		data->fan_div[0] = (reg_array_tmp[0] >> 4) & 0x03;
		data->fan_div[1] = (reg_array_tmp[0] >> 6) & 0x03;
		data->fan_div[2] = (reg_array_tmp[1] >> 6) & 0x03;
		data->fan_div[3] = reg_array_tmp[2] & 0x07;
		data->fan_div[4] = (reg_array_tmp[2] >> 4) & 0x07;

		/* Update the first temperature sensor */
		for (i = 0; i < 3; i++) {
			data->temp1[i] = w83791d_read(client,
						W83791D_REG_TEMP1[i]);
		}

		/* Update the rest of the temperature sensors */
		for (i = 0; i < 2; i++) {
			for (j = 0; j < 3; j++) {
				data->temp_add[i][j] =
					(w83791d_read(client,
					W83791D_REG_TEMP_ADD[i][j * 2]) << 8) |
					w83791d_read(client,
					W83791D_REG_TEMP_ADD[i][j * 2 + 1]);
			}
		}

		/* Update the realtime status */
		data->alarms =
			w83791d_read(client, W83791D_REG_ALARM1) +
			(w83791d_read(client, W83791D_REG_ALARM2) << 8) +
			(w83791d_read(client, W83791D_REG_ALARM3) << 16);

		/* Update the beep configuration information */
		data->beep_mask =
			w83791d_read(client, W83791D_REG_BEEP_CTRL[0]) +
			(w83791d_read(client, W83791D_REG_BEEP_CTRL[1]) << 8) +
			(w83791d_read(client, W83791D_REG_BEEP_CTRL[2]) << 16);

C
Charles Spirakis 已提交
1251
		/* Extract global beep enable flag */
1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332
		data->beep_enable =
			(data->beep_mask >> GLOBAL_BEEP_ENABLE_SHIFT) & 0x01;

		/* Update the cpu voltage information */
		i = w83791d_read(client, W83791D_REG_VID_FANDIV);
		data->vid = i & 0x0f;
		data->vid |= (w83791d_read(client, W83791D_REG_DID_VID4) & 0x01)
				<< 4;

		data->last_updated = jiffies;
		data->valid = 1;
	}

	mutex_unlock(&data->update_lock);

#ifdef DEBUG
	w83791d_print_debug(data, dev);
#endif

	return data;
}

#ifdef DEBUG
static void w83791d_print_debug(struct w83791d_data *data, struct device *dev)
{
	int i = 0, j = 0;

	dev_dbg(dev, "======Start of w83791d debug values======\n");
	dev_dbg(dev, "%d set of Voltages: ===>\n", NUMBER_OF_VIN);
	for (i = 0; i < NUMBER_OF_VIN; i++) {
		dev_dbg(dev, "vin[%d] is:     0x%02x\n", i, data->in[i]);
		dev_dbg(dev, "vin[%d] min is: 0x%02x\n", i, data->in_min[i]);
		dev_dbg(dev, "vin[%d] max is: 0x%02x\n", i, data->in_max[i]);
	}
	dev_dbg(dev, "%d set of Fan Counts/Divisors: ===>\n", NUMBER_OF_FANIN);
	for (i = 0; i < NUMBER_OF_FANIN; i++) {
		dev_dbg(dev, "fan[%d] is:     0x%02x\n", i, data->fan[i]);
		dev_dbg(dev, "fan[%d] min is: 0x%02x\n", i, data->fan_min[i]);
		dev_dbg(dev, "fan_div[%d] is: 0x%02x\n", i, data->fan_div[i]);
	}

	/* temperature math is signed, but only print out the
	   bits that matter */
	dev_dbg(dev, "%d set of Temperatures: ===>\n", NUMBER_OF_TEMPIN);
	for (i = 0; i < 3; i++) {
		dev_dbg(dev, "temp1[%d] is: 0x%02x\n", i, (u8) data->temp1[i]);
	}
	for (i = 0; i < 2; i++) {
		for (j = 0; j < 3; j++) {
			dev_dbg(dev, "temp_add[%d][%d] is: 0x%04x\n", i, j,
				(u16) data->temp_add[i][j]);
		}
	}

	dev_dbg(dev, "Misc Information: ===>\n");
	dev_dbg(dev, "alarm is:     0x%08x\n", data->alarms);
	dev_dbg(dev, "beep_mask is: 0x%08x\n", data->beep_mask);
	dev_dbg(dev, "beep_enable is: %d\n", data->beep_enable);
	dev_dbg(dev, "vid is: 0x%02x\n", data->vid);
	dev_dbg(dev, "vrm is: 0x%02x\n", data->vrm);
	dev_dbg(dev, "=======End of w83791d debug values========\n");
	dev_dbg(dev, "\n");
}
#endif

static int __init sensors_w83791d_init(void)
{
	return i2c_add_driver(&w83791d_driver);
}

static void __exit sensors_w83791d_exit(void)
{
	i2c_del_driver(&w83791d_driver);
}

MODULE_AUTHOR("Charles Spirakis <bezaur@gmail.com>");
MODULE_DESCRIPTION("W83791D driver");
MODULE_LICENSE("GPL");

module_init(sensors_w83791d_init);
module_exit(sensors_w83791d_exit);