[net-next-2.6.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 };

enum chips {
	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_list	= normal_i2c,
};

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	36
e5e9f44c JD	37	enum chips {
e5e9f44c JD	38	adm1021, adm1023, max1617, max1617a, thmc10, lm84, gl523sm, mc1066 };
1da177e4 LT	39
	40	/* adm1021 constants specified below */
	41
	42	/* The adm1021 registers */
	43	/* Read-only */
a8d6646e KH	44	/* For nr in 0-1 */
a8d6646e KH	45	#define ADM1021_REG_TEMP(nr) (nr)
1da177e4	46	#define ADM1021_REG_STATUS 0x02
c83c41e4 KH	47	/* 0x41 = AD, 0x49 = TI, 0x4D = Maxim, 0x23 = Genesys , 0x54 = Onsemi */
	48	#define ADM1021_REG_MAN_ID 0xFE
	49	/* ADM1021 = 0x0X, ADM1023 = 0x3X */
	50	#define ADM1021_REG_DEV_ID 0xFF
1da177e4 LT	51	/* These use different addresses for reading/writing */
	52	#define ADM1021_REG_CONFIG_R 0x03
	53	#define ADM1021_REG_CONFIG_W 0x09
	54	#define ADM1021_REG_CONV_RATE_R 0x04
	55	#define ADM1021_REG_CONV_RATE_W 0x0A
	56	/* These are for the ADM1023's additional precision on the remote temp sensor */
c83c41e4 KH	57	#define ADM1023_REG_REM_TEMP_PREC 0x10
	58	#define ADM1023_REG_REM_OFFSET 0x11
	59	#define ADM1023_REG_REM_OFFSET_PREC 0x12
	60	#define ADM1023_REG_REM_TOS_PREC 0x13
	61	#define ADM1023_REG_REM_THYST_PREC 0x14
1da177e4	62	/* limits */
a8d6646e KH	63	/* For nr in 0-1 */
	64	#define ADM1021_REG_TOS_R(nr) (0x05 + 2 * (nr))
	65	#define ADM1021_REG_TOS_W(nr) (0x0B + 2 * (nr))
	66	#define ADM1021_REG_THYST_R(nr) (0x06 + 2 * (nr))
	67	#define ADM1021_REG_THYST_W(nr) (0x0C + 2 * (nr))
1da177e4 LT	68	/* write-only */
	69	#define ADM1021_REG_ONESHOT 0x0F
	70
1da177e4 LT	71	/* Initial values */
1da177e4 LT	72
c83c41e4 KH	73	/* Note: Even though I left the low and high limits named os and hyst,
	74	they don't quite work like a thermostat the way the LM75 does. I.e.,
	75	a lower temp than THYST actually triggers an alarm instead of
1da177e4 LT	76	clearing it. Weird, ey? --Phil */
	77
	78	/* Each client has this additional data */
	79	struct adm1021_data {
1beeffe4	80	struct device *hwmon_dev;
1da177e4 LT	81	enum chips type;
1da177e4 LT	82
9a61bf63	83	struct mutex update_lock;
1da177e4	84	char valid; /* !=0 if following fields are valid */
905ffdc3	85	char low_power; /* !=0 if device in low power mode */
1da177e4 LT	86	unsigned long last_updated; /* In jiffies */
1da177e4 LT	87
f2668895 MA	88	int temp_max[2]; /* Register values */
	89	int temp_min[2];
	90	int temp[2];
a8d6646e KH	91	u8 alarms;
a8d6646e KH	92	/* Special values for ADM1023 only */
a8d6646e KH	93	u8 remote_temp_offset;
a8d6646e KH	94	u8 remote_temp_offset_prec;
1da177e4 LT	95	};
1da177e4 LT	96
65817ed8 JD	97	static int adm1021_probe(struct i2c_client *client,
65817ed8 JD	98	const struct i2c_device_id *id);
310ec792	99	static int adm1021_detect(struct i2c_client *client,
65817ed8	100	struct i2c_board_info *info);
1da177e4	101	static void adm1021_init_client(struct i2c_client *client);
65817ed8	102	static int adm1021_remove(struct i2c_client *client);
1da177e4 LT	103	static struct adm1021_data adm1021_update_device(struct device dev);
	104
	105	/* (amalysh) read only mode, otherwise any limit's writing confuse BIOS */
02002963	106	static int read_only;
1da177e4 LT	107
1da177e4 LT	108
65817ed8 JD	109	static const struct i2c_device_id adm1021_id[] = {
	110	{ "adm1021", adm1021 },
	111	{ "adm1023", adm1023 },
	112	{ "max1617", max1617 },
	113	{ "max1617a", max1617a },
	114	{ "thmc10", thmc10 },
	115	{ "lm84", lm84 },
	116	{ "gl523sm", gl523sm },
	117	{ "mc1066", mc1066 },
	118	{ }
	119	};
	120	MODULE_DEVICE_TABLE(i2c, adm1021_id);
	121
1da177e4 LT	122	/* This is the driver that will be inserted */
1da177e4 LT	123	static struct i2c_driver adm1021_driver = {
65817ed8	124	.class = I2C_CLASS_HWMON,
cdaf7934	125	.driver = {
cdaf7934 LR	126	.name = "adm1021",
cdaf7934 LR	127	},
65817ed8 JD	128	.probe = adm1021_probe,
	129	.remove = adm1021_remove,
	130	.id_table = adm1021_id,
	131	.detect = adm1021_detect,
c3813d6a	132	.address_list = normal_i2c,
1da177e4 LT	133	};
1da177e4 LT	134
a8d6646e KH	135	static ssize_t show_temp(struct device *dev,
	136	struct device_attribute devattr, char buf)
	137	{
	138	int index = to_sensor_dev_attr(devattr)->index;
	139	struct adm1021_data *data = adm1021_update_device(dev);
	140
f2668895	141	return sprintf(buf, "%d\n", data->temp[index]);
a8d6646e KH	142	}
	143
	144	static ssize_t show_temp_max(struct device *dev,
	145	struct device_attribute devattr, char buf)
	146	{
	147	int index = to_sensor_dev_attr(devattr)->index;
	148	struct adm1021_data *data = adm1021_update_device(dev);
	149
f2668895	150	return sprintf(buf, "%d\n", data->temp_max[index]);
a8d6646e KH	151	}
	152
	153	static ssize_t show_temp_min(struct device *dev,
	154	struct device_attribute devattr, char buf)
	155	{
	156	int index = to_sensor_dev_attr(devattr)->index;
	157	struct adm1021_data *data = adm1021_update_device(dev);
	158
f2668895	159	return sprintf(buf, "%d\n", data->temp_min[index]);
1da177e4	160	}
1da177e4	161
739ba248 KH	162	static ssize_t show_alarm(struct device dev, struct device_attribute attr,
	163	char *buf)
	164	{
	165	int index = to_sensor_dev_attr(attr)->index;
	166	struct adm1021_data *data = adm1021_update_device(dev);
	167	return sprintf(buf, "%u\n", (data->alarms >> index) & 1);
	168	}
	169
c83c41e4 KH	170	static ssize_t show_alarms(struct device *dev,
	171	struct device_attribute *attr,
	172	char *buf)
	173	{
	174	struct adm1021_data *data = adm1021_update_device(dev);
	175	return sprintf(buf, "%u\n", data->alarms);
1da177e4	176	}
c83c41e4	177
a8d6646e KH	178	static ssize_t set_temp_max(struct device *dev,
	179	struct device_attribute *devattr,
	180	const char *buf, size_t count)
	181	{
	182	int index = to_sensor_dev_attr(devattr)->index;
	183	struct i2c_client *client = to_i2c_client(dev);
	184	struct adm1021_data *data = i2c_get_clientdata(client);
	185	long temp = simple_strtol(buf, NULL, 10) / 1000;
	186
	187	mutex_lock(&data->update_lock);
	188	data->temp_max[index] = SENSORS_LIMIT(temp, -128, 127);
	189	if (!read_only)
	190	i2c_smbus_write_byte_data(client, ADM1021_REG_TOS_W(index),
	191	data->temp_max[index]);
	192	mutex_unlock(&data->update_lock);
	193
	194	return count;
	195	}
	196
	197	static ssize_t set_temp_min(struct device *dev,
	198	struct device_attribute *devattr,
	199	const char *buf, size_t count)
	200	{
	201	int index = to_sensor_dev_attr(devattr)->index;
	202	struct i2c_client *client = to_i2c_client(dev);
	203	struct adm1021_data *data = i2c_get_clientdata(client);
	204	long temp = simple_strtol(buf, NULL, 10) / 1000;
	205
	206	mutex_lock(&data->update_lock);
	207	data->temp_min[index] = SENSORS_LIMIT(temp, -128, 127);
	208	if (!read_only)
	209	i2c_smbus_write_byte_data(client, ADM1021_REG_THYST_W(index),
	210	data->temp_min[index]);
	211	mutex_unlock(&data->update_lock);
	212
	213	return count;
1da177e4	214	}
1da177e4	215
905ffdc3 MA	216	static ssize_t show_low_power(struct device *dev,
	217	struct device_attribute devattr, char buf)
	218	{
	219	struct adm1021_data *data = adm1021_update_device(dev);
	220	return sprintf(buf, "%d\n", data->low_power);
	221	}
	222
	223	static ssize_t set_low_power(struct device *dev,
	224	struct device_attribute *devattr,
	225	const char *buf, size_t count)
	226	{
	227	struct i2c_client *client = to_i2c_client(dev);
	228	struct adm1021_data *data = i2c_get_clientdata(client);
	229	int low_power = simple_strtol(buf, NULL, 10) != 0;
	230
	231	mutex_lock(&data->update_lock);
	232	if (low_power != data->low_power) {
	233	int config = i2c_smbus_read_byte_data(
	234	client, ADM1021_REG_CONFIG_R);
	235	data->low_power = low_power;
	236	i2c_smbus_write_byte_data(client, ADM1021_REG_CONFIG_W,
	237	(config & 0xBF) \| (low_power << 6));
	238	}
	239	mutex_unlock(&data->update_lock);
	240
	241	return count;
	242	}
	243
	244
a8d6646e KH	245	static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL, 0);
	246	static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR \| S_IRUGO, show_temp_max,
	247	set_temp_max, 0);
	248	static SENSOR_DEVICE_ATTR(temp1_min, S_IWUSR \| S_IRUGO, show_temp_min,
	249	set_temp_min, 0);
	250	static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp, NULL, 1);
	251	static SENSOR_DEVICE_ATTR(temp2_max, S_IWUSR \| S_IRUGO, show_temp_max,
	252	set_temp_max, 1);
	253	static SENSOR_DEVICE_ATTR(temp2_min, S_IWUSR \| S_IRUGO, show_temp_min,
	254	set_temp_min, 1);
739ba248 KH	255	static SENSOR_DEVICE_ATTR(temp1_max_alarm, S_IRUGO, show_alarm, NULL, 6);
	256	static SENSOR_DEVICE_ATTR(temp1_min_alarm, S_IRUGO, show_alarm, NULL, 5);
	257	static SENSOR_DEVICE_ATTR(temp2_max_alarm, S_IRUGO, show_alarm, NULL, 4);
	258	static SENSOR_DEVICE_ATTR(temp2_min_alarm, S_IRUGO, show_alarm, NULL, 3);
	259	static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_alarm, NULL, 2);
	260
a8d6646e	261	static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
905ffdc3	262	static DEVICE_ATTR(low_power, S_IWUSR \| S_IRUGO, show_low_power, set_low_power);
1da177e4	263
681c6f7a	264	static struct attribute *adm1021_attributes[] = {
a8d6646e KH	265	&sensor_dev_attr_temp1_max.dev_attr.attr,
	266	&sensor_dev_attr_temp1_min.dev_attr.attr,
	267	&sensor_dev_attr_temp1_input.dev_attr.attr,
	268	&sensor_dev_attr_temp2_max.dev_attr.attr,
	269	&sensor_dev_attr_temp2_min.dev_attr.attr,
	270	&sensor_dev_attr_temp2_input.dev_attr.attr,
739ba248 KH	271	&sensor_dev_attr_temp1_max_alarm.dev_attr.attr,
	272	&sensor_dev_attr_temp1_min_alarm.dev_attr.attr,
	273	&sensor_dev_attr_temp2_max_alarm.dev_attr.attr,
	274	&sensor_dev_attr_temp2_min_alarm.dev_attr.attr,
	275	&sensor_dev_attr_temp2_fault.dev_attr.attr,
681c6f7a	276	&dev_attr_alarms.attr,
905ffdc3	277	&dev_attr_low_power.attr,
681c6f7a MH	278	NULL
	279	};
	280
	281	static const struct attribute_group adm1021_group = {
	282	.attrs = adm1021_attributes,
	283	};
	284
65817ed8	285	/* Return 0 if detection is successful, -ENODEV otherwise */
310ec792	286	static int adm1021_detect(struct i2c_client *client,
65817ed8	287	struct i2c_board_info *info)
1da177e4	288	{
65817ed8	289	struct i2c_adapter *adapter = client->adapter;
8007ea35 JD	290	const char *type_name;
8007ea35 JD	291	int conv_rate, status, config, man_id, dev_id;
1da177e4	292
c83c41e4 KH	293	if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) {
	294	pr_debug("adm1021: detect failed, "
	295	"smbus byte data not supported!\n");
65817ed8	296	return -ENODEV;
1da177e4	297	}
1da177e4	298
c83c41e4 KH	299	status = i2c_smbus_read_byte_data(client, ADM1021_REG_STATUS);
	300	conv_rate = i2c_smbus_read_byte_data(client,
	301	ADM1021_REG_CONV_RATE_R);
	302	config = i2c_smbus_read_byte_data(client, ADM1021_REG_CONFIG_R);
1da177e4	303
8007ea35 JD	304	/* Check unused bits */
	305	if ((status & 0x03) \|\| (config & 0x3F) \|\| (conv_rate & 0xF8)) {
	306	pr_debug("adm1021: detect failed, chip not detected!\n");
	307	return -ENODEV;
1da177e4 LT	308	}
	309
	310	/* Determine the chip type. */
8007ea35 JD	311	man_id = i2c_smbus_read_byte_data(client, ADM1021_REG_MAN_ID);
8007ea35 JD	312	dev_id = i2c_smbus_read_byte_data(client, ADM1021_REG_DEV_ID);
1da177e4	313
8007ea35	314	if (man_id == 0x4d && dev_id == 0x01)
1da177e4	315	type_name = "max1617a";
8007ea35 JD	316	else if (man_id == 0x41) {
	317	if ((dev_id & 0xF0) == 0x30)
	318	type_name = "adm1023";
	319	else
	320	type_name = "adm1021";
	321	} else if (man_id == 0x49)
1da177e4	322	type_name = "thmc10";
8007ea35	323	else if (man_id == 0x23)
1da177e4	324	type_name = "gl523sm";
8007ea35	325	else if (man_id == 0x54)
1da177e4	326	type_name = "mc1066";
8007ea35 JD	327	/* LM84 Mfr ID in a different place, and it has more unused bits */
	328	else if (conv_rate == 0x00
	329	&& (config & 0x7F) == 0x00
	330	&& (status & 0xAB) == 0x00)
	331	type_name = "lm84";
	332	else
	333	type_name = "max1617";
	334
c83c41e4	335	pr_debug("adm1021: Detected chip %s at adapter %d, address 0x%02x.\n",
65817ed8 JD	336	type_name, i2c_adapter_id(adapter), client->addr);
65817ed8 JD	337	strlcpy(info->type, type_name, I2C_NAME_SIZE);
1da177e4	338
65817ed8 JD	339	return 0;
65817ed8 JD	340	}
1da177e4	341
65817ed8 JD	342	static int adm1021_probe(struct i2c_client *client,
	343	const struct i2c_device_id *id)
	344	{
	345	struct adm1021_data *data;
	346	int err;
	347
	348	data = kzalloc(sizeof(struct adm1021_data), GFP_KERNEL);
	349	if (!data) {
	350	pr_debug("adm1021: detect failed, kzalloc failed!\n");
	351	err = -ENOMEM;
	352	goto error0;
	353	}
	354
	355	i2c_set_clientdata(client, data);
	356	data->type = id->driver_data;
	357	mutex_init(&data->update_lock);
1da177e4 LT	358
1da177e4 LT	359	/* Initialize the ADM1021 chip */
65817ed8	360	if (data->type != lm84 && !read_only)
c83c41e4	361	adm1021_init_client(client);
1da177e4 LT	362
1da177e4 LT	363	/* Register sysfs hooks */
c83c41e4	364	if ((err = sysfs_create_group(&client->dev.kobj, &adm1021_group)))
65817ed8	365	goto error1;
681c6f7a	366
1beeffe4 TJ	367	data->hwmon_dev = hwmon_device_register(&client->dev);
	368	if (IS_ERR(data->hwmon_dev)) {
	369	err = PTR_ERR(data->hwmon_dev);
681c6f7a	370	goto error3;
943b0830 MH	371	}
943b0830 MH	372
1da177e4 LT	373	return 0;
1da177e4 LT	374
681c6f7a	375	error3:
c83c41e4	376	sysfs_remove_group(&client->dev.kobj, &adm1021_group);
1da177e4 LT	377	error1:
	378	kfree(data);
	379	error0:
	380	return err;
	381	}
	382
	383	static void adm1021_init_client(struct i2c_client *client)
	384	{
	385	/* Enable ADC and disable suspend mode */
c83c41e4 KH	386	i2c_smbus_write_byte_data(client, ADM1021_REG_CONFIG_W,
c83c41e4 KH	387	i2c_smbus_read_byte_data(client, ADM1021_REG_CONFIG_R) & 0xBF);
1da177e4	388	/* Set Conversion rate to 1/sec (this can be tinkered with) */
c83c41e4	389	i2c_smbus_write_byte_data(client, ADM1021_REG_CONV_RATE_W, 0x04);
1da177e4 LT	390	}
1da177e4 LT	391
65817ed8	392	static int adm1021_remove(struct i2c_client *client)
1da177e4	393	{
943b0830	394	struct adm1021_data *data = i2c_get_clientdata(client);
1da177e4	395
1beeffe4	396	hwmon_device_unregister(data->hwmon_dev);
681c6f7a	397	sysfs_remove_group(&client->dev.kobj, &adm1021_group);
943b0830	398
943b0830	399	kfree(data);
1da177e4 LT	400	return 0;
	401	}
	402
1da177e4 LT	403	static struct adm1021_data adm1021_update_device(struct device dev)
	404	{
	405	struct i2c_client *client = to_i2c_client(dev);
	406	struct adm1021_data *data = i2c_get_clientdata(client);
	407
9a61bf63	408	mutex_lock(&data->update_lock);
1da177e4 LT	409
	410	if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
	411	\|\| !data->valid) {
a8d6646e KH	412	int i;
a8d6646e KH	413
1da177e4 LT	414	dev_dbg(&client->dev, "Starting adm1021 update\n");
1da177e4 LT	415
a8d6646e	416	for (i = 0; i < 2; i++) {
f2668895 MA	417	data->temp[i] = 1000 *
	418	(s8) i2c_smbus_read_byte_data(
	419	client, ADM1021_REG_TEMP(i));
	420	data->temp_max[i] = 1000 *
	421	(s8) i2c_smbus_read_byte_data(
	422	client, ADM1021_REG_TOS_R(i));
	423	data->temp_min[i] = 1000 *
	424	(s8) i2c_smbus_read_byte_data(
	425	client, ADM1021_REG_THYST_R(i));
a8d6646e	426	}
c83c41e4 KH	427	data->alarms = i2c_smbus_read_byte_data(client,
c83c41e4 KH	428	ADM1021_REG_STATUS) & 0x7c;
1da177e4	429	if (data->type == adm1023) {
f2668895 MA	430	/* The ADM1023 provides 3 extra bits of precision for
	431	* the remote sensor in extra registers. */
	432	data->temp[1] += 125 * (i2c_smbus_read_byte_data(
	433	client, ADM1023_REG_REM_TEMP_PREC) >> 5);
	434	data->temp_max[1] += 125 * (i2c_smbus_read_byte_data(
	435	client, ADM1023_REG_REM_TOS_PREC) >> 5);
	436	data->temp_min[1] += 125 * (i2c_smbus_read_byte_data(
	437	client, ADM1023_REG_REM_THYST_PREC) >> 5);
c83c41e4 KH	438	data->remote_temp_offset =
	439	i2c_smbus_read_byte_data(client,
	440	ADM1023_REG_REM_OFFSET);
	441	data->remote_temp_offset_prec =
	442	i2c_smbus_read_byte_data(client,
	443	ADM1023_REG_REM_OFFSET_PREC);
1da177e4 LT	444	}
	445	data->last_updated = jiffies;
	446	data->valid = 1;
	447	}
	448
9a61bf63	449	mutex_unlock(&data->update_lock);
1da177e4 LT	450
	451	return data;
	452	}
	453
	454	static int __init sensors_adm1021_init(void)
	455	{
	456	return i2c_add_driver(&adm1021_driver);
	457	}
	458
	459	static void __exit sensors_adm1021_exit(void)
	460	{
	461	i2c_del_driver(&adm1021_driver);
	462	}
	463
	464	MODULE_AUTHOR ("Frodo Looijaard <frodol@dds.nl> and "
	465	"Philip Edelbrock <phil@netroedge.com>");
	466	MODULE_DESCRIPTION("adm1021 driver");
	467	MODULE_LICENSE("GPL");
	468
	469	module_param(read_only, bool, 0);
	470	MODULE_PARM_DESC(read_only, "Don't set any values, read only mode");
	471
	472	module_init(sensors_adm1021_init)
	473	module_exit(sensors_adm1021_exit)