[deliverable/linux.git] / drivers / hwmon / thmc50.c

/*
    thmc50.c - Part of lm_sensors, Linux kernel modules for hardware
             monitoring
    Copyright (C) 2007 Krzysztof Helt <krzysztof.h1@wp.pl>
    Based on 2.4 driver by 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/i2c.h>
#include <linux/hwmon.h>
#include <linux/hwmon-sysfs.h>
#include <linux/err.h>
#include <linux/mutex.h>

MODULE_LICENSE("GPL");

/* Addresses to scan */
static const unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, I2C_CLIENT_END };

/* Insmod parameters */
I2C_CLIENT_INSMOD_2(thmc50, adm1022);
I2C_CLIENT_MODULE_PARM(adm1022_temp3, "List of adapter,address pairs "
			"to enable 3rd temperature (ADM1022 only)");

/* Many THMC50 constants specified below */

/* The THMC50 registers */
#define THMC50_REG_CONF				0x40
#define THMC50_REG_COMPANY_ID			0x3E
#define THMC50_REG_DIE_CODE			0x3F
#define THMC50_REG_ANALOG_OUT			0x19
/*
 * The mirror status register cannot be used as
 * reading it does not clear alarms.
 */
#define THMC50_REG_INTR				0x41

static const u8 THMC50_REG_TEMP[] = { 0x27, 0x26, 0x20 };
static const u8 THMC50_REG_TEMP_MIN[] = { 0x3A, 0x38, 0x2C };
static const u8 THMC50_REG_TEMP_MAX[] = { 0x39, 0x37, 0x2B };

#define THMC50_REG_CONF_nFANOFF			0x20

/* Each client has this additional data */
struct thmc50_data {
	struct device *hwmon_dev;

	struct mutex update_lock;
	enum chips type;
	unsigned long last_updated;	/* In jiffies */
	char has_temp3;		/* !=0 if it is ADM1022 in temp3 mode */
	char valid;		/* !=0 if following fields are valid */

	/* Register values */
	s8 temp_input[3];
	s8 temp_max[3];
	s8 temp_min[3];
	u8 analog_out;
	u8 alarms;
};

static int thmc50_detect(struct i2c_client *client, int kind,
			 struct i2c_board_info *info);
static int thmc50_probe(struct i2c_client *client,
			const struct i2c_device_id *id);
static int thmc50_remove(struct i2c_client *client);
static void thmc50_init_client(struct i2c_client *client);
static struct thmc50_data *thmc50_update_device(struct device *dev);

static const struct i2c_device_id thmc50_id[] = {
	{ "adm1022", adm1022 },
	{ "thmc50", thmc50 },
	{ }
};
MODULE_DEVICE_TABLE(i2c, thmc50_id);

static struct i2c_driver thmc50_driver = {
	.class = I2C_CLASS_HWMON,
	.driver = {
		.name = "thmc50",
	},
	.probe = thmc50_probe,
	.remove = thmc50_remove,
	.id_table = thmc50_id,
	.detect = thmc50_detect,
	.address_data = &addr_data,
};

static ssize_t show_analog_out(struct device *dev,
			       struct device_attribute *attr, char *buf)
{
	struct thmc50_data *data = thmc50_update_device(dev);
	return sprintf(buf, "%d\n", data->analog_out);
}

static ssize_t set_analog_out(struct device *dev,
			      struct device_attribute *attr,
			      const char *buf, size_t count)
{
	struct i2c_client *client = to_i2c_client(dev);
	struct thmc50_data *data = i2c_get_clientdata(client);
	int tmp = simple_strtoul(buf, NULL, 10);
	int config;

	mutex_lock(&data->update_lock);
	data->analog_out = SENSORS_LIMIT(tmp, 0, 255);
	i2c_smbus_write_byte_data(client, THMC50_REG_ANALOG_OUT,
				  data->analog_out);

	config = i2c_smbus_read_byte_data(client, THMC50_REG_CONF);
	if (data->analog_out == 0)
		config &= ~THMC50_REG_CONF_nFANOFF;
	else
		config |= THMC50_REG_CONF_nFANOFF;
	i2c_smbus_write_byte_data(client, THMC50_REG_CONF, config);

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

/* There is only one PWM mode = DC */
static ssize_t show_pwm_mode(struct device *dev, struct device_attribute *attr,
			     char *buf)
{
	return sprintf(buf, "0\n");
}

/* Temperatures */
static ssize_t show_temp(struct device *dev, struct device_attribute *attr,
			 char *buf)
{
	int nr = to_sensor_dev_attr(attr)->index;
	struct thmc50_data *data = thmc50_update_device(dev);
	return sprintf(buf, "%d\n", data->temp_input[nr] * 1000);
}

static ssize_t show_temp_min(struct device *dev, struct device_attribute *attr,
			     char *buf)
{
	int nr = to_sensor_dev_attr(attr)->index;
	struct thmc50_data *data = thmc50_update_device(dev);
	return sprintf(buf, "%d\n", data->temp_min[nr] * 1000);
}

static ssize_t set_temp_min(struct device *dev, struct device_attribute *attr,
			    const char *buf, size_t count)
{
	int nr = to_sensor_dev_attr(attr)->index;
	struct i2c_client *client = to_i2c_client(dev);
	struct thmc50_data *data = i2c_get_clientdata(client);
	int val = simple_strtol(buf, NULL, 10);

	mutex_lock(&data->update_lock);
	data->temp_min[nr] = SENSORS_LIMIT(val / 1000, -128, 127);
	i2c_smbus_write_byte_data(client, THMC50_REG_TEMP_MIN[nr],
				  data->temp_min[nr]);
	mutex_unlock(&data->update_lock);
	return count;
}

static ssize_t show_temp_max(struct device *dev, struct device_attribute *attr,
			     char *buf)
{
	int nr = to_sensor_dev_attr(attr)->index;
	struct thmc50_data *data = thmc50_update_device(dev);
	return sprintf(buf, "%d\n", data->temp_max[nr] * 1000);
}

static ssize_t set_temp_max(struct device *dev, struct device_attribute *attr,
			    const char *buf, size_t count)
{
	int nr = to_sensor_dev_attr(attr)->index;
	struct i2c_client *client = to_i2c_client(dev);
	struct thmc50_data *data = i2c_get_clientdata(client);
	int val = simple_strtol(buf, NULL, 10);

	mutex_lock(&data->update_lock);
	data->temp_max[nr] = SENSORS_LIMIT(val / 1000, -128, 127);
	i2c_smbus_write_byte_data(client, THMC50_REG_TEMP_MAX[nr],
				  data->temp_max[nr]);
	mutex_unlock(&data->update_lock);
	return count;
}

static ssize_t show_alarm(struct device *dev, struct device_attribute *attr,
			  char *buf)
{
	int index = to_sensor_dev_attr(attr)->index;
	struct thmc50_data *data = thmc50_update_device(dev);

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

#define temp_reg(offset)						\
static SENSOR_DEVICE_ATTR(temp##offset##_input, S_IRUGO, show_temp,	\
			NULL, offset - 1);				\
static SENSOR_DEVICE_ATTR(temp##offset##_min, S_IRUGO | S_IWUSR,	\
			show_temp_min, set_temp_min, offset - 1);	\
static SENSOR_DEVICE_ATTR(temp##offset##_max, S_IRUGO | S_IWUSR,	\
			show_temp_max, set_temp_max, offset - 1);

temp_reg(1);
temp_reg(2);
temp_reg(3);

static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 0);
static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 5);
static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL, 1);
static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_alarm, NULL, 7);
static SENSOR_DEVICE_ATTR(temp3_fault, S_IRUGO, show_alarm, NULL, 2);

static SENSOR_DEVICE_ATTR(pwm1, S_IRUGO | S_IWUSR, show_analog_out,
			  set_analog_out, 0);
static SENSOR_DEVICE_ATTR(pwm1_mode, S_IRUGO, show_pwm_mode, NULL, 0);

static struct attribute *thmc50_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_temp1_alarm.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_temp2_alarm.dev_attr.attr,
	&sensor_dev_attr_temp2_fault.dev_attr.attr,
	&sensor_dev_attr_pwm1.dev_attr.attr,
	&sensor_dev_attr_pwm1_mode.dev_attr.attr,
	NULL
};

static const struct attribute_group thmc50_group = {
	.attrs = thmc50_attributes,
};

/* for ADM1022 3rd temperature mode */
static struct attribute *temp3_attributes[] = {
	&sensor_dev_attr_temp3_max.dev_attr.attr,
	&sensor_dev_attr_temp3_min.dev_attr.attr,
	&sensor_dev_attr_temp3_input.dev_attr.attr,
	&sensor_dev_attr_temp3_alarm.dev_attr.attr,
	&sensor_dev_attr_temp3_fault.dev_attr.attr,
	NULL
};

static const struct attribute_group temp3_group = {
	.attrs = temp3_attributes,
};

/* Return 0 if detection is successful, -ENODEV otherwise */
static int thmc50_detect(struct i2c_client *client, int kind,
			 struct i2c_board_info *info)
{
	unsigned company;
	unsigned revision;
	unsigned config;
	struct i2c_adapter *adapter = client->adapter;
	int err = 0;
	const char *type_name;

	if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) {
		pr_debug("thmc50: detect failed, "
			 "smbus byte data not supported!\n");
		return -ENODEV;
	}

	pr_debug("thmc50: Probing for THMC50 at 0x%2X on bus %d\n",
		 client->addr, i2c_adapter_id(client->adapter));

	/* Now, we do the remaining detection. */
	company = i2c_smbus_read_byte_data(client, THMC50_REG_COMPANY_ID);
	revision = i2c_smbus_read_byte_data(client, THMC50_REG_DIE_CODE);
	config = i2c_smbus_read_byte_data(client, THMC50_REG_CONF);

	if (kind == 0)
		kind = thmc50;
	else if (kind < 0) {
		err = -ENODEV;
		if (revision >= 0xc0 && ((config & 0x10) == 0)) {
			if (company == 0x49) {
				kind = thmc50;
				err = 0;
			} else if (company == 0x41) {
				kind = adm1022;
				err = 0;
			}
		}
	}
	if (err == -ENODEV) {
		pr_debug("thmc50: Detection of THMC50/ADM1022 failed\n");
		return err;
	}

	if (kind == adm1022) {
		int id = i2c_adapter_id(client->adapter);
		int i;

		type_name = "adm1022";
		for (i = 0; i + 1 < adm1022_temp3_num; i += 2)
			if (adm1022_temp3[i] == id &&
			    adm1022_temp3[i + 1] == client->addr) {
				/* enable 2nd remote temp */
				config |= (1 << 7);
				i2c_smbus_write_byte_data(client,
							  THMC50_REG_CONF,
							  config);
				break;
			}
	} else {
		type_name = "thmc50";
	}
	pr_debug("thmc50: Detected %s (version %x, revision %x)\n",
		 type_name, (revision >> 4) - 0xc, revision & 0xf);

	strlcpy(info->type, type_name, I2C_NAME_SIZE);

	return 0;
}

static int thmc50_probe(struct i2c_client *client,
			const struct i2c_device_id *id)
{
	struct thmc50_data *data;
	int err;

	data = kzalloc(sizeof(struct thmc50_data), GFP_KERNEL);
	if (!data) {
		pr_debug("thmc50: detect failed, kzalloc failed!\n");
		err = -ENOMEM;
		goto exit;
	}

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

	thmc50_init_client(client);

	/* Register sysfs hooks */
	if ((err = sysfs_create_group(&client->dev.kobj, &thmc50_group)))
		goto exit_free;

	/* Register ADM1022 sysfs hooks */
	if (data->has_temp3)
		if ((err = sysfs_create_group(&client->dev.kobj,
					      &temp3_group)))
			goto exit_remove_sysfs_thmc50;

	/* Register a new directory entry with module sensors */
	data->hwmon_dev = hwmon_device_register(&client->dev);
	if (IS_ERR(data->hwmon_dev)) {
		err = PTR_ERR(data->hwmon_dev);
		goto exit_remove_sysfs;
	}

	return 0;

exit_remove_sysfs:
	if (data->has_temp3)
		sysfs_remove_group(&client->dev.kobj, &temp3_group);
exit_remove_sysfs_thmc50:
	sysfs_remove_group(&client->dev.kobj, &thmc50_group);
exit_free:
	kfree(data);
exit:
	return err;
}

static int thmc50_remove(struct i2c_client *client)
{
	struct thmc50_data *data = i2c_get_clientdata(client);

	hwmon_device_unregister(data->hwmon_dev);
	sysfs_remove_group(&client->dev.kobj, &thmc50_group);
	if (data->has_temp3)
		sysfs_remove_group(&client->dev.kobj, &temp3_group);

	kfree(data);

	return 0;
}

static void thmc50_init_client(struct i2c_client *client)
{
	struct thmc50_data *data = i2c_get_clientdata(client);
	int config;

	data->analog_out = i2c_smbus_read_byte_data(client,
						    THMC50_REG_ANALOG_OUT);
	/* set up to at least 1 */
	if (data->analog_out == 0) {
		data->analog_out = 1;
		i2c_smbus_write_byte_data(client, THMC50_REG_ANALOG_OUT,
					  data->analog_out);
	}
	config = i2c_smbus_read_byte_data(client, THMC50_REG_CONF);
	config |= 0x1;	/* start the chip if it is in standby mode */
	if (data->type == adm1022 && (config & (1 << 7)))
		data->has_temp3 = 1;
	i2c_smbus_write_byte_data(client, THMC50_REG_CONF, config);
}

static struct thmc50_data *thmc50_update_device(struct device *dev)
{
	struct i2c_client *client = to_i2c_client(dev);
	struct thmc50_data *data = i2c_get_clientdata(client);
	int timeout = HZ / 5 + (data->type == thmc50 ? HZ : 0);

	mutex_lock(&data->update_lock);

	if (time_after(jiffies, data->last_updated + timeout)
	    || !data->valid) {

		int temps = data->has_temp3 ? 3 : 2;
		int i;
		for (i = 0; i < temps; i++) {
			data->temp_input[i] = i2c_smbus_read_byte_data(client,
						THMC50_REG_TEMP[i]);
			data->temp_max[i] = i2c_smbus_read_byte_data(client,
						THMC50_REG_TEMP_MAX[i]);
			data->temp_min[i] = i2c_smbus_read_byte_data(client,
						THMC50_REG_TEMP_MIN[i]);
		}
		data->analog_out =
		    i2c_smbus_read_byte_data(client, THMC50_REG_ANALOG_OUT);
		data->alarms =
		    i2c_smbus_read_byte_data(client, THMC50_REG_INTR);
		data->last_updated = jiffies;
		data->valid = 1;
	}

	mutex_unlock(&data->update_lock);

	return data;
}

static int __init sm_thmc50_init(void)
{
	return i2c_add_driver(&thmc50_driver);
}

static void __exit sm_thmc50_exit(void)
{
	i2c_del_driver(&thmc50_driver);
}

MODULE_AUTHOR("Krzysztof Helt <krzysztof.h1@wp.pl>");
MODULE_DESCRIPTION("THMC50 driver");

module_init(sm_thmc50_init);
module_exit(sm_thmc50_exit);
Commit	Line	Data
add77c64 KH	1	/*
	2	thmc50.c - Part of lm_sensors, Linux kernel modules for hardware
	3	monitoring
	4	Copyright (C) 2007 Krzysztof Helt <krzysztof.h1@wp.pl>
	5	Based on 2.4 driver by Frodo Looijaard <frodol@dds.nl> and
	6	Philip Edelbrock <phil@netroedge.com>
	7
	8	This program is free software; you can redistribute it and/or modify
	9	it under the terms of the GNU General Public License as published by
	10	the Free Software Foundation; either version 2 of the License, or
	11	(at your option) any later version.
	12
	13	This program is distributed in the hope that it will be useful,
	14	but WITHOUT ANY WARRANTY; without even the implied warranty of
	15	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	16	GNU General Public License for more details.
	17
	18	You should have received a copy of the GNU General Public License
	19	along with this program; if not, write to the Free Software
	20	Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
	21	*/
	22
	23	#include <linux/module.h>
	24	#include <linux/init.h>
	25	#include <linux/slab.h>
	26	#include <linux/i2c.h>
	27	#include <linux/hwmon.h>
	28	#include <linux/hwmon-sysfs.h>
	29	#include <linux/err.h>
	30	#include <linux/mutex.h>
	31
	32	MODULE_LICENSE("GPL");
	33
	34	/* Addresses to scan */
25e9c86d	35	static const unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, I2C_CLIENT_END };
add77c64 KH	36
	37	/* Insmod parameters */
	38	I2C_CLIENT_INSMOD_2(thmc50, adm1022);
	39	I2C_CLIENT_MODULE_PARM(adm1022_temp3, "List of adapter,address pairs "
	40	"to enable 3rd temperature (ADM1022 only)");
	41
	42	/* Many THMC50 constants specified below */
	43
	44	/* The THMC50 registers */
	45	#define THMC50_REG_CONF 0x40
	46	#define THMC50_REG_COMPANY_ID 0x3E
	47	#define THMC50_REG_DIE_CODE 0x3F
	48	#define THMC50_REG_ANALOG_OUT 0x19
dcf3b5fb	49	/*
bba891c2 KH	50	* The mirror status register cannot be used as
bba891c2 KH	51	* reading it does not clear alarms.
dcf3b5fb	52	*/
bba891c2	53	#define THMC50_REG_INTR 0x41
add77c64	54
5910a9b2 TK	55	static const u8 THMC50_REG_TEMP[] = { 0x27, 0x26, 0x20 };
	56	static const u8 THMC50_REG_TEMP_MIN[] = { 0x3A, 0x38, 0x2C };
	57	static const u8 THMC50_REG_TEMP_MAX[] = { 0x39, 0x37, 0x2B };
add77c64 KH	58
	59	#define THMC50_REG_CONF_nFANOFF 0x20
	60
	61	/* Each client has this additional data */
	62	struct thmc50_data {
1beeffe4	63	struct device *hwmon_dev;
add77c64 KH	64
	65	struct mutex update_lock;
	66	enum chips type;
	67	unsigned long last_updated; /* In jiffies */
	68	char has_temp3; /* !=0 if it is ADM1022 in temp3 mode */
	69	char valid; /* !=0 if following fields are valid */
	70
	71	/* Register values */
	72	s8 temp_input[3];
	73	s8 temp_max[3];
	74	s8 temp_min[3];
	75	u8 analog_out;
dcf3b5fb	76	u8 alarms;
add77c64 KH	77	};
add77c64 KH	78
ccf37488 JD	79	static int thmc50_detect(struct i2c_client *client, int kind,
	80	struct i2c_board_info *info);
	81	static int thmc50_probe(struct i2c_client *client,
	82	const struct i2c_device_id *id);
	83	static int thmc50_remove(struct i2c_client *client);
add77c64 KH	84	static void thmc50_init_client(struct i2c_client *client);
	85	static struct thmc50_data thmc50_update_device(struct device dev);
	86
ccf37488 JD	87	static const struct i2c_device_id thmc50_id[] = {
	88	{ "adm1022", adm1022 },
	89	{ "thmc50", thmc50 },
	90	{ }
	91	};
	92	MODULE_DEVICE_TABLE(i2c, thmc50_id);
	93
add77c64	94	static struct i2c_driver thmc50_driver = {
ccf37488	95	.class = I2C_CLASS_HWMON,
add77c64 KH	96	.driver = {
	97	.name = "thmc50",
	98	},
ccf37488 JD	99	.probe = thmc50_probe,
	100	.remove = thmc50_remove,
	101	.id_table = thmc50_id,
	102	.detect = thmc50_detect,
	103	.address_data = &addr_data,
add77c64 KH	104	};
	105
	106	static ssize_t show_analog_out(struct device *dev,
	107	struct device_attribute attr, char buf)
	108	{
	109	struct thmc50_data *data = thmc50_update_device(dev);
	110	return sprintf(buf, "%d\n", data->analog_out);
	111	}
	112
	113	static ssize_t set_analog_out(struct device *dev,
	114	struct device_attribute *attr,
	115	const char *buf, size_t count)
	116	{
	117	struct i2c_client *client = to_i2c_client(dev);
	118	struct thmc50_data *data = i2c_get_clientdata(client);
	119	int tmp = simple_strtoul(buf, NULL, 10);
	120	int config;
	121
	122	mutex_lock(&data->update_lock);
	123	data->analog_out = SENSORS_LIMIT(tmp, 0, 255);
	124	i2c_smbus_write_byte_data(client, THMC50_REG_ANALOG_OUT,
	125	data->analog_out);
	126
	127	config = i2c_smbus_read_byte_data(client, THMC50_REG_CONF);
	128	if (data->analog_out == 0)
	129	config &= ~THMC50_REG_CONF_nFANOFF;
	130	else
	131	config \|= THMC50_REG_CONF_nFANOFF;
	132	i2c_smbus_write_byte_data(client, THMC50_REG_CONF, config);
	133
	134	mutex_unlock(&data->update_lock);
	135	return count;
	136	}
	137
	138	/* There is only one PWM mode = DC */
	139	static ssize_t show_pwm_mode(struct device dev, struct device_attribute attr,
	140	char *buf)
	141	{
	142	return sprintf(buf, "0\n");
	143	}
	144
	145	/* Temperatures */
	146	static ssize_t show_temp(struct device dev, struct device_attribute attr,
	147	char *buf)
	148	{
	149	int nr = to_sensor_dev_attr(attr)->index;
	150	struct thmc50_data *data = thmc50_update_device(dev);
	151	return sprintf(buf, "%d\n", data->temp_input[nr] * 1000);
	152	}
	153
	154	static ssize_t show_temp_min(struct device dev, struct device_attribute attr,
	155	char *buf)
	156	{
	157	int nr = to_sensor_dev_attr(attr)->index;
	158	struct thmc50_data *data = thmc50_update_device(dev);
	159	return sprintf(buf, "%d\n", data->temp_min[nr] * 1000);
	160	}
	161
	162	static ssize_t set_temp_min(struct device dev, struct device_attribute attr,
	163	const char *buf, size_t count)
	164	{
	165	int nr = to_sensor_dev_attr(attr)->index;
	166	struct i2c_client *client = to_i2c_client(dev);
	167	struct thmc50_data *data = i2c_get_clientdata(client);
168	int val = simple_strtol(buf, NULL, 10);
169
170	mutex_lock(&data->update_lock);
171	data->temp_min[nr] = SENSORS_LIMIT(val / 1000, -128, 127);
172	i2c_smbus_write_byte_data(client, THMC50_REG_TEMP_MIN[nr],
173	data->temp_min[nr]);
174	mutex_unlock(&data->update_lock);
175	return count;
176	}
177
178	static ssize_t show_temp_max(struct device dev, struct device_attribute attr,
179	char *buf)
180	{
181	int nr = to_sensor_dev_attr(attr)->index;
182	struct thmc50_data *data = thmc50_update_device(dev);
183	return sprintf(buf, "%d\n", data->temp_max[nr] * 1000);
184	}
185
186	static ssize_t set_temp_max(struct device dev, struct device_attribute attr,
187	const char *buf, size_t count)
188	{
189	int nr = to_sensor_dev_attr(attr)->index;
190	struct i2c_client *client = to_i2c_client(dev);
191	struct thmc50_data *data = i2c_get_clientdata(client);
192	int val = simple_strtol(buf, NULL, 10);
193
194	mutex_lock(&data->update_lock);
195	data->temp_max[nr] = SENSORS_LIMIT(val / 1000, -128, 127);
196	i2c_smbus_write_byte_data(client, THMC50_REG_TEMP_MAX[nr],
197	data->temp_max[nr]);
198	mutex_unlock(&data->update_lock);
199	return count;
200	}
201
dcf3b5fb KH	202	static ssize_t show_alarm(struct device dev, struct device_attribute attr,
	203	char *buf)
	204	{
	205	int index = to_sensor_dev_attr(attr)->index;
	206	struct thmc50_data *data = thmc50_update_device(dev);
	207
	208	return sprintf(buf, "%u\n", (data->alarms >> index) & 1);
	209	}
	210
add77c64 KH	211	#define temp_reg(offset) \
	212	static SENSOR_DEVICE_ATTR(temp##offset##_input, S_IRUGO, show_temp, \
	213	NULL, offset - 1); \
	214	static SENSOR_DEVICE_ATTR(temp##offset##_min, S_IRUGO \| S_IWUSR, \
	215	show_temp_min, set_temp_min, offset - 1); \
	216	static SENSOR_DEVICE_ATTR(temp##offset##_max, S_IRUGO \| S_IWUSR, \
	217	show_temp_max, set_temp_max, offset - 1);
	218
	219	temp_reg(1);
	220	temp_reg(2);
	221	temp_reg(3);
	222
dcf3b5fb KH	223	static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 0);
	224	static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 5);
	225	static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL, 1);
	226	static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_alarm, NULL, 7);
	227	static SENSOR_DEVICE_ATTR(temp3_fault, S_IRUGO, show_alarm, NULL, 2);
	228
add77c64 KH	229	static SENSOR_DEVICE_ATTR(pwm1, S_IRUGO \| S_IWUSR, show_analog_out,
	230	set_analog_out, 0);
	231	static SENSOR_DEVICE_ATTR(pwm1_mode, S_IRUGO, show_pwm_mode, NULL, 0);
	232
	233	static struct attribute *thmc50_attributes[] = {
	234	&sensor_dev_attr_temp1_max.dev_attr.attr,
	235	&sensor_dev_attr_temp1_min.dev_attr.attr,
	236	&sensor_dev_attr_temp1_input.dev_attr.attr,
dcf3b5fb	237	&sensor_dev_attr_temp1_alarm.dev_attr.attr,
add77c64 KH	238	&sensor_dev_attr_temp2_max.dev_attr.attr,
	239	&sensor_dev_attr_temp2_min.dev_attr.attr,
	240	&sensor_dev_attr_temp2_input.dev_attr.attr,
dcf3b5fb KH	241	&sensor_dev_attr_temp2_alarm.dev_attr.attr,
dcf3b5fb KH	242	&sensor_dev_attr_temp2_fault.dev_attr.attr,
add77c64 KH	243	&sensor_dev_attr_pwm1.dev_attr.attr,
	244	&sensor_dev_attr_pwm1_mode.dev_attr.attr,
	245	NULL
	246	};
	247
	248	static const struct attribute_group thmc50_group = {
	249	.attrs = thmc50_attributes,
	250	};
	251
	252	/* for ADM1022 3rd temperature mode */
894c00cf	253	static struct attribute *temp3_attributes[] = {
add77c64 KH	254	&sensor_dev_attr_temp3_max.dev_attr.attr,
	255	&sensor_dev_attr_temp3_min.dev_attr.attr,
	256	&sensor_dev_attr_temp3_input.dev_attr.attr,
dcf3b5fb KH	257	&sensor_dev_attr_temp3_alarm.dev_attr.attr,
dcf3b5fb KH	258	&sensor_dev_attr_temp3_fault.dev_attr.attr,
add77c64 KH	259	NULL
	260	};
	261
894c00cf JD	262	static const struct attribute_group temp3_group = {
894c00cf JD	263	.attrs = temp3_attributes,
add77c64 KH	264	};
add77c64 KH	265
ccf37488 JD	266	/* Return 0 if detection is successful, -ENODEV otherwise */
	267	static int thmc50_detect(struct i2c_client *client, int kind,
	268	struct i2c_board_info *info)
add77c64 KH	269	{
	270	unsigned company;
	271	unsigned revision;
	272	unsigned config;
ccf37488	273	struct i2c_adapter *adapter = client->adapter;
add77c64	274	int err = 0;
cc28a610	275	const char *type_name;
add77c64 KH	276
	277	if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) {
	278	pr_debug("thmc50: detect failed, "
	279	"smbus byte data not supported!\n");
ccf37488	280	return -ENODEV;
add77c64 KH	281	}
add77c64 KH	282
add77c64 KH	283	pr_debug("thmc50: Probing for THMC50 at 0x%2X on bus %d\n",
	284	client->addr, i2c_adapter_id(client->adapter));
	285
	286	/* Now, we do the remaining detection. */
	287	company = i2c_smbus_read_byte_data(client, THMC50_REG_COMPANY_ID);
	288	revision = i2c_smbus_read_byte_data(client, THMC50_REG_DIE_CODE);
	289	config = i2c_smbus_read_byte_data(client, THMC50_REG_CONF);
	290
	291	if (kind == 0)
	292	kind = thmc50;
	293	else if (kind < 0) {
	294	err = -ENODEV;
	295	if (revision >= 0xc0 && ((config & 0x10) == 0)) {
	296	if (company == 0x49) {
	297	kind = thmc50;
	298	err = 0;
	299	} else if (company == 0x41) {
	300	kind = adm1022;
	301	err = 0;
	302	}
	303	}
	304	}
	305	if (err == -ENODEV) {
	306	pr_debug("thmc50: Detection of THMC50/ADM1022 failed\n");
ccf37488	307	return err;
add77c64	308	}
add77c64	309
cc28a610	310	if (kind == adm1022) {
add77c64 KH	311	int id = i2c_adapter_id(client->adapter);
	312	int i;
	313
	314	type_name = "adm1022";
add77c64 KH	315	for (i = 0; i + 1 < adm1022_temp3_num; i += 2)
add77c64 KH	316	if (adm1022_temp3[i] == id &&
ccf37488	317	adm1022_temp3[i + 1] == client->addr) {
add77c64	318	/* enable 2nd remote temp */
ccf37488 JD	319	config \|= (1 << 7);
	320	i2c_smbus_write_byte_data(client,
	321	THMC50_REG_CONF,
	322	config);
add77c64 KH	323	break;
add77c64 KH	324	}
cc28a610 JD	325	} else {
cc28a610 JD	326	type_name = "thmc50";
add77c64	327	}
cc28a610 JD	328	pr_debug("thmc50: Detected %s (version %x, revision %x)\n",
cc28a610 JD	329	type_name, (revision >> 4) - 0xc, revision & 0xf);
add77c64	330
ccf37488	331	strlcpy(info->type, type_name, I2C_NAME_SIZE);
add77c64	332
ccf37488 JD	333	return 0;
	334	}
	335
	336	static int thmc50_probe(struct i2c_client *client,
	337	const struct i2c_device_id *id)
	338	{
	339	struct thmc50_data *data;
	340	int err;
	341
	342	data = kzalloc(sizeof(struct thmc50_data), GFP_KERNEL);
	343	if (!data) {
	344	pr_debug("thmc50: detect failed, kzalloc failed!\n");
	345	err = -ENOMEM;
	346	goto exit;
	347	}
	348
	349	i2c_set_clientdata(client, data);
	350	data->type = id->driver_data;
	351	mutex_init(&data->update_lock);
add77c64 KH	352
	353	thmc50_init_client(client);
	354
	355	/* Register sysfs hooks */
	356	if ((err = sysfs_create_group(&client->dev.kobj, &thmc50_group)))
ccf37488	357	goto exit_free;
add77c64 KH	358
add77c64 KH	359	/* Register ADM1022 sysfs hooks */
894c00cf	360	if (data->has_temp3)
add77c64	361	if ((err = sysfs_create_group(&client->dev.kobj,
894c00cf	362	&temp3_group)))
add77c64 KH	363	goto exit_remove_sysfs_thmc50;
	364
	365	/* Register a new directory entry with module sensors */
1beeffe4 TJ	366	data->hwmon_dev = hwmon_device_register(&client->dev);
	367	if (IS_ERR(data->hwmon_dev)) {
	368	err = PTR_ERR(data->hwmon_dev);
add77c64 KH	369	goto exit_remove_sysfs;
	370	}
	371
	372	return 0;
	373
	374	exit_remove_sysfs:
894c00cf JD	375	if (data->has_temp3)
894c00cf JD	376	sysfs_remove_group(&client->dev.kobj, &temp3_group);
add77c64 KH	377	exit_remove_sysfs_thmc50:
add77c64 KH	378	sysfs_remove_group(&client->dev.kobj, &thmc50_group);
add77c64 KH	379	exit_free:
	380	kfree(data);
	381	exit:
	382	return err;
	383	}
	384
ccf37488	385	static int thmc50_remove(struct i2c_client *client)
add77c64 KH	386	{
add77c64 KH	387	struct thmc50_data *data = i2c_get_clientdata(client);
add77c64	388
1beeffe4	389	hwmon_device_unregister(data->hwmon_dev);
add77c64	390	sysfs_remove_group(&client->dev.kobj, &thmc50_group);
894c00cf JD	391	if (data->has_temp3)
894c00cf JD	392	sysfs_remove_group(&client->dev.kobj, &temp3_group);
add77c64	393
add77c64 KH	394	kfree(data);
	395
	396	return 0;
	397	}
	398
	399	static void thmc50_init_client(struct i2c_client *client)
	400	{
	401	struct thmc50_data *data = i2c_get_clientdata(client);
	402	int config;
	403
	404	data->analog_out = i2c_smbus_read_byte_data(client,
	405	THMC50_REG_ANALOG_OUT);
	406	/* set up to at least 1 */
	407	if (data->analog_out == 0) {
	408	data->analog_out = 1;
	409	i2c_smbus_write_byte_data(client, THMC50_REG_ANALOG_OUT,
	410	data->analog_out);
	411	}
	412	config = i2c_smbus_read_byte_data(client, THMC50_REG_CONF);
	413	config \|= 0x1; /* start the chip if it is in standby mode */
ccf37488 JD	414	if (data->type == adm1022 && (config & (1 << 7)))
ccf37488 JD	415	data->has_temp3 = 1;
add77c64 KH	416	i2c_smbus_write_byte_data(client, THMC50_REG_CONF, config);
	417	}
	418
	419	static struct thmc50_data thmc50_update_device(struct device dev)
	420	{
	421	struct i2c_client *client = to_i2c_client(dev);
	422	struct thmc50_data *data = i2c_get_clientdata(client);
	423	int timeout = HZ / 5 + (data->type == thmc50 ? HZ : 0);
	424
	425	mutex_lock(&data->update_lock);
	426
	427	if (time_after(jiffies, data->last_updated + timeout)
	428	\|\| !data->valid) {
	429
	430	int temps = data->has_temp3 ? 3 : 2;
	431	int i;
	432	for (i = 0; i < temps; i++) {
	433	data->temp_input[i] = i2c_smbus_read_byte_data(client,
	434	THMC50_REG_TEMP[i]);
	435	data->temp_max[i] = i2c_smbus_read_byte_data(client,
	436	THMC50_REG_TEMP_MAX[i]);
	437	data->temp_min[i] = i2c_smbus_read_byte_data(client,
	438	THMC50_REG_TEMP_MIN[i]);
	439	}
	440	data->analog_out =
	441	i2c_smbus_read_byte_data(client, THMC50_REG_ANALOG_OUT);
dcf3b5fb	442	data->alarms =
bba891c2	443	i2c_smbus_read_byte_data(client, THMC50_REG_INTR);
add77c64 KH	444	data->last_updated = jiffies;
	445	data->valid = 1;
	446	}
	447
	448	mutex_unlock(&data->update_lock);
	449
	450	return data;
	451	}
	452
	453	static int __init sm_thmc50_init(void)
	454	{
	455	return i2c_add_driver(&thmc50_driver);
	456	}
	457
	458	static void __exit sm_thmc50_exit(void)
	459	{
	460	i2c_del_driver(&thmc50_driver);
	461	}
	462
	463	MODULE_AUTHOR("Krzysztof Helt <krzysztof.h1@wp.pl>");
	464	MODULE_DESCRIPTION("THMC50 driver");
	465
	466	module_init(sm_thmc50_init);
	467	module_exit(sm_thmc50_exit);