[linux-2.6-block.git] / drivers / hwmon / adm1021.c

/*
    adm1021.c - Part of lm_sensors, Linux kernel modules for hardware
		monitoring
    Copyright (c) 1998, 1999  Frodo Looijaard <frodol@dds.nl> and
    Philip Edelbrock <phil@netroedge.com>

    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/

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


/* Addresses to scan */
static const unsigned short normal_i2c[] = {
	0x18, 0x19, 0x1a, 0x29, 0x2a, 0x2b, 0x4c, 0x4d, 0x4e, I2C_CLIENT_END };

/* Insmod parameters */
I2C_CLIENT_INSMOD_8(adm1021, adm1023, max1617, max1617a, thmc10, lm84, gl523sm,
			mc1066);

/* adm1021 constants specified below */

/* The adm1021 registers */
/* Read-only */
/* For nr in 0-1 */
#define ADM1021_REG_TEMP(nr)		(nr)
#define ADM1021_REG_STATUS		0x02
/* 0x41 = AD, 0x49 = TI, 0x4D = Maxim, 0x23 = Genesys , 0x54 = Onsemi */
#define ADM1021_REG_MAN_ID		0xFE
/* ADM1021 = 0x0X, ADM1023 = 0x3X */
#define ADM1021_REG_DEV_ID		0xFF
/* These use different addresses for reading/writing */
#define ADM1021_REG_CONFIG_R		0x03
#define ADM1021_REG_CONFIG_W		0x09
#define ADM1021_REG_CONV_RATE_R		0x04
#define ADM1021_REG_CONV_RATE_W		0x0A
/* These are for the ADM1023's additional precision on the remote temp sensor */
#define ADM1023_REG_REM_TEMP_PREC	0x10
#define ADM1023_REG_REM_OFFSET		0x11
#define ADM1023_REG_REM_OFFSET_PREC	0x12
#define ADM1023_REG_REM_TOS_PREC	0x13
#define ADM1023_REG_REM_THYST_PREC	0x14
/* limits */
/* For nr in 0-1 */
#define ADM1021_REG_TOS_R(nr)		(0x05 + 2 * (nr))
#define ADM1021_REG_TOS_W(nr)		(0x0B + 2 * (nr))
#define ADM1021_REG_THYST_R(nr)		(0x06 + 2 * (nr))
#define ADM1021_REG_THYST_W(nr)		(0x0C + 2 * (nr))
/* write-only */
#define ADM1021_REG_ONESHOT		0x0F

/* Initial values */

/* Note: Even though I left the low and high limits named os and hyst,
they don't quite work like a thermostat the way the LM75 does.  I.e.,
a lower temp than THYST actually triggers an alarm instead of
clearing it.  Weird, ey?   --Phil  */

/* Each client has this additional data */
struct adm1021_data {
	struct device *hwmon_dev;
	enum chips type;

	struct mutex update_lock;
	char valid;		/* !=0 if following fields are valid */
	char low_power;		/* !=0 if device in low power mode */
	unsigned long last_updated;	/* In jiffies */

	int temp_max[2];		/* Register values */
	int temp_min[2];
	int temp[2];
	u8 alarms;
	/* Special values for ADM1023 only */
	u8 remote_temp_offset;
	u8 remote_temp_offset_prec;
};

static int adm1021_probe(struct i2c_client *client,
			 const struct i2c_device_id *id);
static int adm1021_detect(struct i2c_client *client,
			  struct i2c_board_info *info);
static void adm1021_init_client(struct i2c_client *client);
static int adm1021_remove(struct i2c_client *client);
static struct adm1021_data *adm1021_update_device(struct device *dev);

/* (amalysh) read only mode, otherwise any limit's writing confuse BIOS */
static int read_only;


static const struct i2c_device_id adm1021_id[] = {
	{ "adm1021", adm1021 },
	{ "adm1023", adm1023 },
	{ "max1617", max1617 },
	{ "max1617a", max1617a },
	{ "thmc10", thmc10 },
	{ "lm84", lm84 },
	{ "gl523sm", gl523sm },
	{ "mc1066", mc1066 },
	{ }
};
MODULE_DEVICE_TABLE(i2c, adm1021_id);

/* This is the driver that will be inserted */
static struct i2c_driver adm1021_driver = {
	.class		= I2C_CLASS_HWMON,
	.driver = {
		.name	= "adm1021",
	},
	.probe		= adm1021_probe,
	.remove		= adm1021_remove,
	.id_table	= adm1021_id,
	.detect		= adm1021_detect,
	.address_data	= &addr_data,
};

static ssize_t show_temp(struct device *dev,
			 struct device_attribute *devattr, char *buf)
{
	int index = to_sensor_dev_attr(devattr)->index;
	struct adm1021_data *data = adm1021_update_device(dev);

	return sprintf(buf, "%d\n", data->temp[index]);
}

static ssize_t show_temp_max(struct device *dev,
			     struct device_attribute *devattr, char *buf)
{
	int index = to_sensor_dev_attr(devattr)->index;
	struct adm1021_data *data = adm1021_update_device(dev);

	return sprintf(buf, "%d\n", data->temp_max[index]);
}

static ssize_t show_temp_min(struct device *dev,
			     struct device_attribute *devattr, char *buf)
{
	int index = to_sensor_dev_attr(devattr)->index;
	struct adm1021_data *data = adm1021_update_device(dev);

	return sprintf(buf, "%d\n", data->temp_min[index]);
}

static ssize_t show_alarm(struct device *dev, struct device_attribute *attr,
			  char *buf)
{
	int index = to_sensor_dev_attr(attr)->index;
	struct adm1021_data *data = adm1021_update_device(dev);
	return sprintf(buf, "%u\n", (data->alarms >> index) & 1);
}

static ssize_t show_alarms(struct device *dev,
			   struct device_attribute *attr,
			   char *buf)
{
	struct adm1021_data *data = adm1021_update_device(dev);
	return sprintf(buf, "%u\n", data->alarms);
}

static ssize_t set_temp_max(struct device *dev,
			    struct device_attribute *devattr,
			    const char *buf, size_t count)
{
	int index = to_sensor_dev_attr(devattr)->index;
	struct i2c_client *client = to_i2c_client(dev);
	struct adm1021_data *data = i2c_get_clientdata(client);
	long temp = simple_strtol(buf, NULL, 10) / 1000;

	mutex_lock(&data->update_lock);
	data->temp_max[index] = SENSORS_LIMIT(temp, -128, 127);
	if (!read_only)
		i2c_smbus_write_byte_data(client, ADM1021_REG_TOS_W(index),
					  data->temp_max[index]);
	mutex_unlock(&data->update_lock);

	return count;
}

static ssize_t set_temp_min(struct device *dev,
			    struct device_attribute *devattr,
			    const char *buf, size_t count)
{
	int index = to_sensor_dev_attr(devattr)->index;
	struct i2c_client *client = to_i2c_client(dev);
	struct adm1021_data *data = i2c_get_clientdata(client);
	long temp = simple_strtol(buf, NULL, 10) / 1000;

	mutex_lock(&data->update_lock);
	data->temp_min[index] = SENSORS_LIMIT(temp, -128, 127);
	if (!read_only)
		i2c_smbus_write_byte_data(client, ADM1021_REG_THYST_W(index),
					  data->temp_min[index]);
	mutex_unlock(&data->update_lock);

	return count;
}

static ssize_t show_low_power(struct device *dev,
			      struct device_attribute *devattr, char *buf)
{
	struct adm1021_data *data = adm1021_update_device(dev);
	return sprintf(buf, "%d\n", data->low_power);
}

static ssize_t set_low_power(struct device *dev,
			     struct device_attribute *devattr,
			     const char *buf, size_t count)
{
	struct i2c_client *client = to_i2c_client(dev);
	struct adm1021_data *data = i2c_get_clientdata(client);
	int low_power = simple_strtol(buf, NULL, 10) != 0;

	mutex_lock(&data->update_lock);
	if (low_power != data->low_power) {
		int config = i2c_smbus_read_byte_data(
			client, ADM1021_REG_CONFIG_R);
		data->low_power = low_power;
		i2c_smbus_write_byte_data(client, ADM1021_REG_CONFIG_W,
			(config & 0xBF) | (low_power << 6));
	}
	mutex_unlock(&data->update_lock);

	return count;
}


static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL, 0);
static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, show_temp_max,
			  set_temp_max, 0);
static SENSOR_DEVICE_ATTR(temp1_min, S_IWUSR | S_IRUGO, show_temp_min,
			  set_temp_min, 0);
static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp, NULL, 1);
static SENSOR_DEVICE_ATTR(temp2_max, S_IWUSR | S_IRUGO, show_temp_max,
			  set_temp_max, 1);
static SENSOR_DEVICE_ATTR(temp2_min, S_IWUSR | S_IRUGO, show_temp_min,
			  set_temp_min, 1);
static SENSOR_DEVICE_ATTR(temp1_max_alarm, S_IRUGO, show_alarm, NULL, 6);
static SENSOR_DEVICE_ATTR(temp1_min_alarm, S_IRUGO, show_alarm, NULL, 5);
static SENSOR_DEVICE_ATTR(temp2_max_alarm, S_IRUGO, show_alarm, NULL, 4);
static SENSOR_DEVICE_ATTR(temp2_min_alarm, S_IRUGO, show_alarm, NULL, 3);
static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_alarm, NULL, 2);

static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
static DEVICE_ATTR(low_power, S_IWUSR | S_IRUGO, show_low_power, set_low_power);

static struct attribute *adm1021_attributes[] = {
	&sensor_dev_attr_temp1_max.dev_attr.attr,
	&sensor_dev_attr_temp1_min.dev_attr.attr,
	&sensor_dev_attr_temp1_input.dev_attr.attr,
	&sensor_dev_attr_temp2_max.dev_attr.attr,
	&sensor_dev_attr_temp2_min.dev_attr.attr,
	&sensor_dev_attr_temp2_input.dev_attr.attr,
	&sensor_dev_attr_temp1_max_alarm.dev_attr.attr,
	&sensor_dev_attr_temp1_min_alarm.dev_attr.attr,
	&sensor_dev_attr_temp2_max_alarm.dev_attr.attr,
	&sensor_dev_attr_temp2_min_alarm.dev_attr.attr,
	&sensor_dev_attr_temp2_fault.dev_attr.attr,
	&dev_attr_alarms.attr,
	&dev_attr_low_power.attr,
	NULL
};

static const struct attribute_group adm1021_group = {
	.attrs = adm1021_attributes,
};

/* Return 0 if detection is successful, -ENODEV otherwise */
static int adm1021_detect(struct i2c_client *client,
			  struct i2c_board_info *info)
{
	struct i2c_adapter *adapter = client->adapter;
	const char *type_name;
	int conv_rate, status, config, man_id, dev_id;

	if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) {
		pr_debug("adm1021: detect failed, "
			 "smbus byte data not supported!\n");
		return -ENODEV;
	}

	status = i2c_smbus_read_byte_data(client, ADM1021_REG_STATUS);
	conv_rate = i2c_smbus_read_byte_data(client,
					     ADM1021_REG_CONV_RATE_R);
	config = i2c_smbus_read_byte_data(client, ADM1021_REG_CONFIG_R);

	/* Check unused bits */
	if ((status & 0x03) || (config & 0x3F) || (conv_rate & 0xF8)) {
		pr_debug("adm1021: detect failed, chip not detected!\n");
		return -ENODEV;
	}

	/* Determine the chip type. */
	man_id = i2c_smbus_read_byte_data(client, ADM1021_REG_MAN_ID);
	dev_id = i2c_smbus_read_byte_data(client, ADM1021_REG_DEV_ID);

	if (man_id == 0x4d && dev_id == 0x01)
		type_name = "max1617a";
	else if (man_id == 0x41) {
		if ((dev_id & 0xF0) == 0x30)
			type_name = "adm1023";
		else
			type_name = "adm1021";
	} else if (man_id == 0x49)
		type_name = "thmc10";
	else if (man_id == 0x23)
		type_name = "gl523sm";
	else if (man_id == 0x54)
		type_name = "mc1066";
	/* LM84 Mfr ID in a different place, and it has more unused bits */
	else if (conv_rate == 0x00
		 && (config & 0x7F) == 0x00
		 && (status & 0xAB) == 0x00)
		type_name = "lm84";
	else
		type_name = "max1617";

	pr_debug("adm1021: Detected chip %s at adapter %d, address 0x%02x.\n",
		 type_name, i2c_adapter_id(adapter), client->addr);
	strlcpy(info->type, type_name, I2C_NAME_SIZE);

	return 0;
}

static int adm1021_probe(struct i2c_client *client,
			 const struct i2c_device_id *id)
{
	struct adm1021_data *data;
	int err;

	data = kzalloc(sizeof(struct adm1021_data), GFP_KERNEL);
	if (!data) {
		pr_debug("adm1021: detect failed, kzalloc failed!\n");
		err = -ENOMEM;
		goto error0;
	}

	i2c_set_clientdata(client, data);
	data->type = id->driver_data;
	mutex_init(&data->update_lock);

	/* Initialize the ADM1021 chip */
	if (data->type != lm84 && !read_only)
		adm1021_init_client(client);

	/* Register sysfs hooks */
	if ((err = sysfs_create_group(&client->dev.kobj, &adm1021_group)))
		goto error1;

	data->hwmon_dev = hwmon_device_register(&client->dev);
	if (IS_ERR(data->hwmon_dev)) {
		err = PTR_ERR(data->hwmon_dev);
		goto error3;
	}

	return 0;

error3:
	sysfs_remove_group(&client->dev.kobj, &adm1021_group);
error1:
	kfree(data);
error0:
	return err;
}

static void adm1021_init_client(struct i2c_client *client)
{
	/* Enable ADC and disable suspend mode */
	i2c_smbus_write_byte_data(client, ADM1021_REG_CONFIG_W,
		i2c_smbus_read_byte_data(client, ADM1021_REG_CONFIG_R) & 0xBF);
	/* Set Conversion rate to 1/sec (this can be tinkered with) */
	i2c_smbus_write_byte_data(client, ADM1021_REG_CONV_RATE_W, 0x04);
}

static int adm1021_remove(struct i2c_client *client)
{
	struct adm1021_data *data = i2c_get_clientdata(client);

	hwmon_device_unregister(data->hwmon_dev);
	sysfs_remove_group(&client->dev.kobj, &adm1021_group);

	kfree(data);
	return 0;
}

static struct adm1021_data *adm1021_update_device(struct device *dev)
{
	struct i2c_client *client = to_i2c_client(dev);
	struct adm1021_data *data = i2c_get_clientdata(client);

	mutex_lock(&data->update_lock);

	if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
	    || !data->valid) {
		int i;

		dev_dbg(&client->dev, "Starting adm1021 update\n");

		for (i = 0; i < 2; i++) {
			data->temp[i] = 1000 *
				(s8) i2c_smbus_read_byte_data(
					client, ADM1021_REG_TEMP(i));
			data->temp_max[i] = 1000 *
				(s8) i2c_smbus_read_byte_data(
					client, ADM1021_REG_TOS_R(i));
			data->temp_min[i] = 1000 *
				(s8) i2c_smbus_read_byte_data(
					client, ADM1021_REG_THYST_R(i));
		}
		data->alarms = i2c_smbus_read_byte_data(client,
						ADM1021_REG_STATUS) & 0x7c;
		if (data->type == adm1023) {
			/* The ADM1023 provides 3 extra bits of precision for
			 * the remote sensor in extra registers. */
			data->temp[1] += 125 * (i2c_smbus_read_byte_data(
				client, ADM1023_REG_REM_TEMP_PREC) >> 5);
			data->temp_max[1] += 125 * (i2c_smbus_read_byte_data(
				client, ADM1023_REG_REM_TOS_PREC) >> 5);
			data->temp_min[1] += 125 * (i2c_smbus_read_byte_data(
				client, ADM1023_REG_REM_THYST_PREC) >> 5);
			data->remote_temp_offset =
				i2c_smbus_read_byte_data(client,
						ADM1023_REG_REM_OFFSET);
			data->remote_temp_offset_prec =
				i2c_smbus_read_byte_data(client,
						ADM1023_REG_REM_OFFSET_PREC);
		}
		data->last_updated = jiffies;
		data->valid = 1;
	}

	mutex_unlock(&data->update_lock);

	return data;
}

static int __init sensors_adm1021_init(void)
{
	return i2c_add_driver(&adm1021_driver);
}

static void __exit sensors_adm1021_exit(void)
{
	i2c_del_driver(&adm1021_driver);
}

MODULE_AUTHOR ("Frodo Looijaard <frodol@dds.nl> and "
		"Philip Edelbrock <phil@netroedge.com>");
MODULE_DESCRIPTION("adm1021 driver");
MODULE_LICENSE("GPL");

module_param(read_only, bool, 0);
MODULE_PARM_DESC(read_only, "Don't set any values, read only mode");

module_init(sensors_adm1021_init)
module_exit(sensors_adm1021_exit)
Commit	Line	Data
1da177e4 LT	1	/*
1da177e4 LT	2	adm1021.c - Part of lm_sensors, Linux kernel modules for hardware
c83c41e4	3	monitoring
1da177e4 LT	4	Copyright (c) 1998, 1999 Frodo Looijaard <frodol@dds.nl> and
	5	Philip Edelbrock <phil@netroedge.com>
	6
	7	This program is free software; you can redistribute it and/or modify
	8	it under the terms of the GNU General Public License as published by
	9	the Free Software Foundation; either version 2 of the License, or
	10	(at your option) any later version.
	11
	12	This program is distributed in the hope that it will be useful,
	13	but WITHOUT ANY WARRANTY; without even the implied warranty of
	14	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	15	GNU General Public License for more details.
	16
	17	You should have received a copy of the GNU General Public License
	18	along with this program; if not, write to the Free Software
	19	Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
	20	*/
	21
1da177e4 LT	22	#include <linux/module.h>
	23	#include <linux/init.h>
	24	#include <linux/slab.h>
	25	#include <linux/jiffies.h>
	26	#include <linux/i2c.h>
943b0830	27	#include <linux/hwmon.h>
a8d6646e	28	#include <linux/hwmon-sysfs.h>
943b0830	29	#include <linux/err.h>
9a61bf63	30	#include <linux/mutex.h>
1da177e4 LT	31
	32
	33	/* Addresses to scan */
25e9c86d MH	34	static const unsigned short normal_i2c[] = {
25e9c86d MH	35	0x18, 0x19, 0x1a, 0x29, 0x2a, 0x2b, 0x4c, 0x4d, 0x4e, I2C_CLIENT_END };
1da177e4 LT	36
1da177e4 LT	37	/* Insmod parameters */
c83c41e4 KH	38	I2C_CLIENT_INSMOD_8(adm1021, adm1023, max1617, max1617a, thmc10, lm84, gl523sm,
c83c41e4 KH	39	mc1066);
1da177e4 LT	40
	41	/* adm1021 constants specified below */
	42
	43	/* The adm1021 registers */
	44	/* Read-only */
a8d6646e KH	45	/* For nr in 0-1 */
a8d6646e KH	46	#define ADM1021_REG_TEMP(nr) (nr)
1da177e4	47	#define ADM1021_REG_STATUS 0x02
c83c41e4 KH	48	/* 0x41 = AD, 0x49 = TI, 0x4D = Maxim, 0x23 = Genesys , 0x54 = Onsemi */
	49	#define ADM1021_REG_MAN_ID 0xFE
	50	/* ADM1021 = 0x0X, ADM1023 = 0x3X */
	51	#define ADM1021_REG_DEV_ID 0xFF
1da177e4 LT	52	/* These use different addresses for reading/writing */
	53	#define ADM1021_REG_CONFIG_R 0x03
	54	#define ADM1021_REG_CONFIG_W 0x09
	55	#define ADM1021_REG_CONV_RATE_R 0x04
	56	#define ADM1021_REG_CONV_RATE_W 0x0A
	57	/* These are for the ADM1023's additional precision on the remote temp sensor */
c83c41e4 KH	58	#define ADM1023_REG_REM_TEMP_PREC 0x10
	59	#define ADM1023_REG_REM_OFFSET 0x11
	60	#define ADM1023_REG_REM_OFFSET_PREC 0x12
	61	#define ADM1023_REG_REM_TOS_PREC 0x13
	62	#define ADM1023_REG_REM_THYST_PREC 0x14
1da177e4	63	/* limits */
a8d6646e KH	64	/* For nr in 0-1 */
	65	#define ADM1021_REG_TOS_R(nr) (0x05 + 2 * (nr))
	66	#define ADM1021_REG_TOS_W(nr) (0x0B + 2 * (nr))
	67	#define ADM1021_REG_THYST_R(nr) (0x06 + 2 * (nr))
	68	#define ADM1021_REG_THYST_W(nr) (0x0C + 2 * (nr))
1da177e4 LT	69	/* write-only */
	70	#define ADM1021_REG_ONESHOT 0x0F
	71
1da177e4 LT	72	/* Initial values */
1da177e4 LT	73
c83c41e4 KH	74	/* Note: Even though I left the low and high limits named os and hyst,
	75	they don't quite work like a thermostat the way the LM75 does. I.e.,
	76	a lower temp than THYST actually triggers an alarm instead of
1da177e4 LT	77	clearing it. Weird, ey? --Phil */
	78
	79	/* Each client has this additional data */
	80	struct adm1021_data {
1beeffe4	81	struct device *hwmon_dev;
1da177e4 LT	82	enum chips type;
1da177e4 LT	83
9a61bf63	84	struct mutex update_lock;
1da177e4	85	char valid; /* !=0 if following fields are valid */
905ffdc3	86	char low_power; /* !=0 if device in low power mode */
1da177e4 LT	87	unsigned long last_updated; /* In jiffies */
1da177e4 LT	88
f2668895 MA	89	int temp_max[2]; /* Register values */
	90	int temp_min[2];
	91	int temp[2];
a8d6646e KH	92	u8 alarms;
a8d6646e KH	93	/* Special values for ADM1023 only */
a8d6646e KH	94	u8 remote_temp_offset;
a8d6646e KH	95	u8 remote_temp_offset_prec;
1da177e4 LT	96	};
1da177e4 LT	97
65817ed8 JD	98	static int adm1021_probe(struct i2c_client *client,
65817ed8 JD	99	const struct i2c_device_id *id);
310ec792	100	static int adm1021_detect(struct i2c_client *client,
65817ed8	101	struct i2c_board_info *info);
1da177e4	102	static void adm1021_init_client(struct i2c_client *client);
65817ed8	103	static int adm1021_remove(struct i2c_client *client);
1da177e4 LT	104	static struct adm1021_data adm1021_update_device(struct device dev);
	105
	106	/* (amalysh) read only mode, otherwise any limit's writing confuse BIOS */
02002963	107	static int read_only;
1da177e4 LT	108
1da177e4 LT	109
65817ed8 JD	110	static const struct i2c_device_id adm1021_id[] = {
	111	{ "adm1021", adm1021 },
	112	{ "adm1023", adm1023 },
	113	{ "max1617", max1617 },
	114	{ "max1617a", max1617a },
	115	{ "thmc10", thmc10 },
	116	{ "lm84", lm84 },
	117	{ "gl523sm", gl523sm },
	118	{ "mc1066", mc1066 },
	119	{ }
	120	};
	121	MODULE_DEVICE_TABLE(i2c, adm1021_id);
	122
1da177e4 LT	123	/* This is the driver that will be inserted */
1da177e4 LT	124	static struct i2c_driver adm1021_driver = {
65817ed8	125	.class = I2C_CLASS_HWMON,
cdaf7934	126	.driver = {
cdaf7934 LR	127	.name = "adm1021",
cdaf7934 LR	128	},
65817ed8 JD	129	.probe = adm1021_probe,
	130	.remove = adm1021_remove,
	131	.id_table = adm1021_id,
	132	.detect = adm1021_detect,
	133	.address_data = &addr_data,
1da177e4 LT	134	};
1da177e4 LT	135
a8d6646e KH	136	static ssize_t show_temp(struct device *dev,
	137	struct device_attribute devattr, char buf)
	138	{
	139	int index = to_sensor_dev_attr(devattr)->index;
	140	struct adm1021_data *data = adm1021_update_device(dev);
	141
f2668895	142	return sprintf(buf, "%d\n", data->temp[index]);
a8d6646e KH	143	}
	144
	145	static ssize_t show_temp_max(struct device *dev,
	146	struct device_attribute devattr, char buf)
	147	{
	148	int index = to_sensor_dev_attr(devattr)->index;
	149	struct adm1021_data *data = adm1021_update_device(dev);
	150
f2668895	151	return sprintf(buf, "%d\n", data->temp_max[index]);
a8d6646e KH	152	}
	153
	154	static ssize_t show_temp_min(struct device *dev,
	155	struct device_attribute devattr, char buf)
	156	{
	157	int index = to_sensor_dev_attr(devattr)->index;
	158	struct adm1021_data *data = adm1021_update_device(dev);
	159
f2668895	160	return sprintf(buf, "%d\n", data->temp_min[index]);
1da177e4	161	}
1da177e4	162
739ba248 KH	163	static ssize_t show_alarm(struct device dev, struct device_attribute attr,
	164	char *buf)
	165	{
	166	int index = to_sensor_dev_attr(attr)->index;
	167	struct adm1021_data *data = adm1021_update_device(dev);
	168	return sprintf(buf, "%u\n", (data->alarms >> index) & 1);
	169	}
	170
c83c41e4 KH	171	static ssize_t show_alarms(struct device *dev,
	172	struct device_attribute *attr,
	173	char *buf)
	174	{
	175	struct adm1021_data *data = adm1021_update_device(dev);
	176	return sprintf(buf, "%u\n", data->alarms);
1da177e4	177	}
c83c41e4	178
a8d6646e KH	179	static ssize_t set_temp_max(struct device *dev,
	180	struct device_attribute *devattr,
	181	const char *buf, size_t count)
	182	{
	183	int index = to_sensor_dev_attr(devattr)->index;
	184	struct i2c_client *client = to_i2c_client(dev);
	185	struct adm1021_data *data = i2c_get_clientdata(client);
	186	long temp = simple_strtol(buf, NULL, 10) / 1000;
	187
	188	mutex_lock(&data->update_lock);
	189	data->temp_max[index] = SENSORS_LIMIT(temp, -128, 127);
	190	if (!read_only)
	191	i2c_smbus_write_byte_data(client, ADM1021_REG_TOS_W(index),
	192	data->temp_max[index]);
	193	mutex_unlock(&data->update_lock);
	194
	195	return count;
	196	}
	197
	198	static ssize_t set_temp_min(struct device *dev,
	199	struct device_attribute *devattr,
	200	const char *buf, size_t count)
	201	{
	202	int index = to_sensor_dev_attr(devattr)->index;
	203	struct i2c_client *client = to_i2c_client(dev);
	204	struct adm1021_data *data = i2c_get_clientdata(client);
	205	long temp = simple_strtol(buf, NULL, 10) / 1000;
	206
	207	mutex_lock(&data->update_lock);
	208	data->temp_min[index] = SENSORS_LIMIT(temp, -128, 127);
	209	if (!read_only)
	210	i2c_smbus_write_byte_data(client, ADM1021_REG_THYST_W(index),
	211	data->temp_min[index]);
	212	mutex_unlock(&data->update_lock);
	213
	214	return count;
1da177e4	215	}
1da177e4	216
905ffdc3 MA	217	static ssize_t show_low_power(struct device *dev,
	218	struct device_attribute devattr, char buf)
	219	{
	220	struct adm1021_data *data = adm1021_update_device(dev);
	221	return sprintf(buf, "%d\n", data->low_power);
	222	}
	223
	224	static ssize_t set_low_power(struct device *dev,
	225	struct device_attribute *devattr,
	226	const char *buf, size_t count)
	227	{
	228	struct i2c_client *client = to_i2c_client(dev);
	229	struct adm1021_data *data = i2c_get_clientdata(client);
	230	int low_power = simple_strtol(buf, NULL, 10) != 0;
	231
	232	mutex_lock(&data->update_lock);
	233	if (low_power != data->low_power) {
	234	int config = i2c_smbus_read_byte_data(
	235	client, ADM1021_REG_CONFIG_R);
	236	data->low_power = low_power;
	237	i2c_smbus_write_byte_data(client, ADM1021_REG_CONFIG_W,
	238	(config & 0xBF) \| (low_power << 6));
	239	}
	240	mutex_unlock(&data->update_lock);
	241
	242	return count;
	243	}
	244
	245
a8d6646e KH	246	static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL, 0);
	247	static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR \| S_IRUGO, show_temp_max,
	248	set_temp_max, 0);
	249	static SENSOR_DEVICE_ATTR(temp1_min, S_IWUSR \| S_IRUGO, show_temp_min,
	250	set_temp_min, 0);
	251	static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp, NULL, 1);
	252	static SENSOR_DEVICE_ATTR(temp2_max, S_IWUSR \| S_IRUGO, show_temp_max,
	253	set_temp_max, 1);
	254	static SENSOR_DEVICE_ATTR(temp2_min, S_IWUSR \| S_IRUGO, show_temp_min,
	255	set_temp_min, 1);
739ba248 KH	256	static SENSOR_DEVICE_ATTR(temp1_max_alarm, S_IRUGO, show_alarm, NULL, 6);
	257	static SENSOR_DEVICE_ATTR(temp1_min_alarm, S_IRUGO, show_alarm, NULL, 5);
	258	static SENSOR_DEVICE_ATTR(temp2_max_alarm, S_IRUGO, show_alarm, NULL, 4);
	259	static SENSOR_DEVICE_ATTR(temp2_min_alarm, S_IRUGO, show_alarm, NULL, 3);
	260	static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_alarm, NULL, 2);
	261
a8d6646e	262	static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
905ffdc3	263	static DEVICE_ATTR(low_power, S_IWUSR \| S_IRUGO, show_low_power, set_low_power);
1da177e4	264
681c6f7a	265	static struct attribute *adm1021_attributes[] = {
a8d6646e KH	266	&sensor_dev_attr_temp1_max.dev_attr.attr,
	267	&sensor_dev_attr_temp1_min.dev_attr.attr,
	268	&sensor_dev_attr_temp1_input.dev_attr.attr,
	269	&sensor_dev_attr_temp2_max.dev_attr.attr,
	270	&sensor_dev_attr_temp2_min.dev_attr.attr,
	271	&sensor_dev_attr_temp2_input.dev_attr.attr,
739ba248 KH	272	&sensor_dev_attr_temp1_max_alarm.dev_attr.attr,
	273	&sensor_dev_attr_temp1_min_alarm.dev_attr.attr,
	274	&sensor_dev_attr_temp2_max_alarm.dev_attr.attr,
	275	&sensor_dev_attr_temp2_min_alarm.dev_attr.attr,
	276	&sensor_dev_attr_temp2_fault.dev_attr.attr,
681c6f7a	277	&dev_attr_alarms.attr,
905ffdc3	278	&dev_attr_low_power.attr,
681c6f7a MH	279	NULL
	280	};
	281
	282	static const struct attribute_group adm1021_group = {
	283	.attrs = adm1021_attributes,
	284	};
	285
65817ed8	286	/* Return 0 if detection is successful, -ENODEV otherwise */
310ec792	287	static int adm1021_detect(struct i2c_client *client,
65817ed8	288	struct i2c_board_info *info)
1da177e4	289	{
65817ed8	290	struct i2c_adapter *adapter = client->adapter;
8007ea35 JD	291	const char *type_name;
8007ea35 JD	292	int conv_rate, status, config, man_id, dev_id;
1da177e4	293
c83c41e4 KH	294	if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) {
	295	pr_debug("adm1021: detect failed, "
	296	"smbus byte data not supported!\n");
65817ed8	297	return -ENODEV;
1da177e4	298	}
1da177e4	299
c83c41e4 KH	300	status = i2c_smbus_read_byte_data(client, ADM1021_REG_STATUS);
	301	conv_rate = i2c_smbus_read_byte_data(client,
	302	ADM1021_REG_CONV_RATE_R);
	303	config = i2c_smbus_read_byte_data(client, ADM1021_REG_CONFIG_R);
1da177e4	304
8007ea35 JD	305	/* Check unused bits */
	306	if ((status & 0x03) \|\| (config & 0x3F) \|\| (conv_rate & 0xF8)) {
	307	pr_debug("adm1021: detect failed, chip not detected!\n");
	308	return -ENODEV;
1da177e4 LT	309	}
	310
	311	/* Determine the chip type. */
8007ea35 JD	312	man_id = i2c_smbus_read_byte_data(client, ADM1021_REG_MAN_ID);
8007ea35 JD	313	dev_id = i2c_smbus_read_byte_data(client, ADM1021_REG_DEV_ID);
1da177e4	314
8007ea35	315	if (man_id == 0x4d && dev_id == 0x01)
1da177e4	316	type_name = "max1617a";
8007ea35 JD	317	else if (man_id == 0x41) {
	318	if ((dev_id & 0xF0) == 0x30)
	319	type_name = "adm1023";
	320	else
	321	type_name = "adm1021";
	322	} else if (man_id == 0x49)
1da177e4	323	type_name = "thmc10";
8007ea35	324	else if (man_id == 0x23)
1da177e4	325	type_name = "gl523sm";
8007ea35	326	else if (man_id == 0x54)
1da177e4	327	type_name = "mc1066";
8007ea35 JD	328	/* LM84 Mfr ID in a different place, and it has more unused bits */
	329	else if (conv_rate == 0x00
	330	&& (config & 0x7F) == 0x00
	331	&& (status & 0xAB) == 0x00)
	332	type_name = "lm84";
	333	else
	334	type_name = "max1617";
	335
c83c41e4	336	pr_debug("adm1021: Detected chip %s at adapter %d, address 0x%02x.\n",
65817ed8 JD	337	type_name, i2c_adapter_id(adapter), client->addr);
65817ed8 JD	338	strlcpy(info->type, type_name, I2C_NAME_SIZE);
1da177e4	339
65817ed8 JD	340	return 0;
65817ed8 JD	341	}
1da177e4	342
65817ed8 JD	343	static int adm1021_probe(struct i2c_client *client,
	344	const struct i2c_device_id *id)
	345	{
	346	struct adm1021_data *data;
	347	int err;
	348
	349	data = kzalloc(sizeof(struct adm1021_data), GFP_KERNEL);
	350	if (!data) {
	351	pr_debug("adm1021: detect failed, kzalloc failed!\n");
	352	err = -ENOMEM;
	353	goto error0;
	354	}
	355
	356	i2c_set_clientdata(client, data);
	357	data->type = id->driver_data;
	358	mutex_init(&data->update_lock);
1da177e4 LT	359
1da177e4 LT	360	/* Initialize the ADM1021 chip */
65817ed8	361	if (data->type != lm84 && !read_only)
c83c41e4	362	adm1021_init_client(client);
1da177e4 LT	363
1da177e4 LT	364	/* Register sysfs hooks */
c83c41e4	365	if ((err = sysfs_create_group(&client->dev.kobj, &adm1021_group)))
65817ed8	366	goto error1;
681c6f7a	367
1beeffe4 TJ	368	data->hwmon_dev = hwmon_device_register(&client->dev);
	369	if (IS_ERR(data->hwmon_dev)) {
	370	err = PTR_ERR(data->hwmon_dev);
681c6f7a	371	goto error3;
943b0830 MH	372	}
943b0830 MH	373
1da177e4 LT	374	return 0;
1da177e4 LT	375
681c6f7a	376	error3:
c83c41e4	377	sysfs_remove_group(&client->dev.kobj, &adm1021_group);
1da177e4 LT	378	error1:
	379	kfree(data);
	380	error0:
	381	return err;
	382	}
	383
	384	static void adm1021_init_client(struct i2c_client *client)
	385	{
	386	/* Enable ADC and disable suspend mode */
c83c41e4 KH	387	i2c_smbus_write_byte_data(client, ADM1021_REG_CONFIG_W,
c83c41e4 KH	388	i2c_smbus_read_byte_data(client, ADM1021_REG_CONFIG_R) & 0xBF);
1da177e4	389	/* Set Conversion rate to 1/sec (this can be tinkered with) */
c83c41e4	390	i2c_smbus_write_byte_data(client, ADM1021_REG_CONV_RATE_W, 0x04);
1da177e4 LT	391	}
1da177e4 LT	392
65817ed8	393	static int adm1021_remove(struct i2c_client *client)
1da177e4	394	{
943b0830	395	struct adm1021_data *data = i2c_get_clientdata(client);
1da177e4	396
1beeffe4	397	hwmon_device_unregister(data->hwmon_dev);
681c6f7a	398	sysfs_remove_group(&client->dev.kobj, &adm1021_group);
943b0830	399
943b0830	400	kfree(data);
1da177e4 LT	401	return 0;
	402	}
	403
1da177e4 LT	404	static struct adm1021_data adm1021_update_device(struct device dev)
	405	{
	406	struct i2c_client *client = to_i2c_client(dev);
	407	struct adm1021_data *data = i2c_get_clientdata(client);
	408
9a61bf63	409	mutex_lock(&data->update_lock);
1da177e4 LT	410
	411	if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
	412	\|\| !data->valid) {
a8d6646e KH	413	int i;
a8d6646e KH	414
1da177e4 LT	415	dev_dbg(&client->dev, "Starting adm1021 update\n");
1da177e4 LT	416
a8d6646e	417	for (i = 0; i < 2; i++) {
f2668895 MA	418	data->temp[i] = 1000 *
	419	(s8) i2c_smbus_read_byte_data(
	420	client, ADM1021_REG_TEMP(i));
	421	data->temp_max[i] = 1000 *
	422	(s8) i2c_smbus_read_byte_data(
	423	client, ADM1021_REG_TOS_R(i));
	424	data->temp_min[i] = 1000 *
	425	(s8) i2c_smbus_read_byte_data(
	426	client, ADM1021_REG_THYST_R(i));
a8d6646e	427	}
c83c41e4 KH	428	data->alarms = i2c_smbus_read_byte_data(client,
c83c41e4 KH	429	ADM1021_REG_STATUS) & 0x7c;
1da177e4	430	if (data->type == adm1023) {
f2668895 MA	431	/* The ADM1023 provides 3 extra bits of precision for
	432	* the remote sensor in extra registers. */
	433	data->temp[1] += 125 * (i2c_smbus_read_byte_data(
	434	client, ADM1023_REG_REM_TEMP_PREC) >> 5);
	435	data->temp_max[1] += 125 * (i2c_smbus_read_byte_data(
	436	client, ADM1023_REG_REM_TOS_PREC) >> 5);
	437	data->temp_min[1] += 125 * (i2c_smbus_read_byte_data(
	438	client, ADM1023_REG_REM_THYST_PREC) >> 5);
c83c41e4 KH	439	data->remote_temp_offset =
	440	i2c_smbus_read_byte_data(client,
	441	ADM1023_REG_REM_OFFSET);
	442	data->remote_temp_offset_prec =
	443	i2c_smbus_read_byte_data(client,
	444	ADM1023_REG_REM_OFFSET_PREC);
1da177e4 LT	445	}
	446	data->last_updated = jiffies;
	447	data->valid = 1;
	448	}
	449
9a61bf63	450	mutex_unlock(&data->update_lock);
1da177e4 LT	451
	452	return data;
	453	}
	454
	455	static int __init sensors_adm1021_init(void)
	456	{
	457	return i2c_add_driver(&adm1021_driver);
	458	}
	459
	460	static void __exit sensors_adm1021_exit(void)
	461	{
	462	i2c_del_driver(&adm1021_driver);
	463	}
	464
	465	MODULE_AUTHOR ("Frodo Looijaard <frodol@dds.nl> and "
	466	"Philip Edelbrock <phil@netroedge.com>");
	467	MODULE_DESCRIPTION("adm1021 driver");
	468	MODULE_LICENSE("GPL");
	469
	470	module_param(read_only, bool, 0);
	471	MODULE_PARM_DESC(read_only, "Don't set any values, read only mode");
	472
	473	module_init(sensors_adm1021_init)
	474	module_exit(sensors_adm1021_exit)