[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 };
static const u8 THMC50_REG_TEMP_CRITICAL[] = { 0x13, 0x14, 0x14 };
static const u8 THMC50_REG_TEMP_DEFAULT[] = { 0x17, 0x18, 0x18 };

#define THMC50_REG_CONF_nFANOFF			0x20
#define THMC50_REG_CONF_PROGRAMMED		0x08

/* 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];
	s8 temp_critical[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_temp_critical(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_critical[nr] * 1000);
}

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);	\
static SENSOR_DEVICE_ATTR(temp##offset##_crit, S_IRUGO,			\
			show_temp_critical, NULL, 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_crit.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_crit.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_crit.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;
	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));

	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 (revision < 0xc0 || (config & 0x10))
		return -ENODEV;

	if (company == 0x41) {
		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 if (company == 0x49) {
		type_name = "thmc50";
	} else {
		pr_debug("thmc50: Detection of THMC50/ADM1022 failed\n");
		return -ENODEV;
	}

	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;
		int prog = i2c_smbus_read_byte_data(client, THMC50_REG_CONF);

		prog &= THMC50_REG_CONF_PROGRAMMED;

		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->temp_critical[i] =
				i2c_smbus_read_byte_data(client,
					prog ? THMC50_REG_TEMP_CRITICAL[i]
					     : THMC50_REG_TEMP_DEFAULT[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 };
84f768c1 KH	58	static const u8 THMC50_REG_TEMP_CRITICAL[] = { 0x13, 0x14, 0x14 };
84f768c1 KH	59	static const u8 THMC50_REG_TEMP_DEFAULT[] = { 0x17, 0x18, 0x18 };
add77c64 KH	60
add77c64 KH	61	#define THMC50_REG_CONF_nFANOFF 0x20
84f768c1	62	#define THMC50_REG_CONF_PROGRAMMED 0x08
add77c64 KH	63
	64	/* Each client has this additional data */
	65	struct thmc50_data {
1beeffe4	66	struct device *hwmon_dev;
add77c64 KH	67
	68	struct mutex update_lock;
	69	enum chips type;
	70	unsigned long last_updated; /* In jiffies */
	71	char has_temp3; /* !=0 if it is ADM1022 in temp3 mode */
	72	char valid; /* !=0 if following fields are valid */
	73
	74	/* Register values */
	75	s8 temp_input[3];
	76	s8 temp_max[3];
	77	s8 temp_min[3];
84f768c1	78	s8 temp_critical[3];
add77c64	79	u8 analog_out;
dcf3b5fb	80	u8 alarms;
add77c64 KH	81	};
add77c64 KH	82
ccf37488 JD	83	static int thmc50_detect(struct i2c_client *client, int kind,
	84	struct i2c_board_info *info);
	85	static int thmc50_probe(struct i2c_client *client,
	86	const struct i2c_device_id *id);
	87	static int thmc50_remove(struct i2c_client *client);
add77c64 KH	88	static void thmc50_init_client(struct i2c_client *client);
	89	static struct thmc50_data thmc50_update_device(struct device dev);
	90
ccf37488 JD	91	static const struct i2c_device_id thmc50_id[] = {
	92	{ "adm1022", adm1022 },
	93	{ "thmc50", thmc50 },
	94	{ }
	95	};
	96	MODULE_DEVICE_TABLE(i2c, thmc50_id);
	97
add77c64	98	static struct i2c_driver thmc50_driver = {
ccf37488	99	.class = I2C_CLASS_HWMON,
add77c64 KH	100	.driver = {
	101	.name = "thmc50",
	102	},
ccf37488 JD	103	.probe = thmc50_probe,
	104	.remove = thmc50_remove,
	105	.id_table = thmc50_id,
	106	.detect = thmc50_detect,
	107	.address_data = &addr_data,
add77c64 KH	108	};
	109
	110	static ssize_t show_analog_out(struct device *dev,
	111	struct device_attribute attr, char buf)
	112	{
	113	struct thmc50_data *data = thmc50_update_device(dev);
	114	return sprintf(buf, "%d\n", data->analog_out);
	115	}
	116
	117	static ssize_t set_analog_out(struct device *dev,
	118	struct device_attribute *attr,
	119	const char *buf, size_t count)
	120	{
	121	struct i2c_client *client = to_i2c_client(dev);
	122	struct thmc50_data *data = i2c_get_clientdata(client);
	123	int tmp = simple_strtoul(buf, NULL, 10);
	124	int config;
	125
	126	mutex_lock(&data->update_lock);
	127	data->analog_out = SENSORS_LIMIT(tmp, 0, 255);
	128	i2c_smbus_write_byte_data(client, THMC50_REG_ANALOG_OUT,
	129	data->analog_out);
	130
	131	config = i2c_smbus_read_byte_data(client, THMC50_REG_CONF);
	132	if (data->analog_out == 0)
	133	config &= ~THMC50_REG_CONF_nFANOFF;
	134	else
	135	config \|= THMC50_REG_CONF_nFANOFF;
	136	i2c_smbus_write_byte_data(client, THMC50_REG_CONF, config);
	137
	138	mutex_unlock(&data->update_lock);
	139	return count;
	140	}
	141
	142	/* There is only one PWM mode = DC */
	143	static ssize_t show_pwm_mode(struct device dev, struct device_attribute attr,
	144	char *buf)
	145	{
	146	return sprintf(buf, "0\n");
	147	}
	148
	149	/* Temperatures */
	150	static ssize_t show_temp(struct device dev, struct device_attribute attr,
	151	char *buf)
	152	{
	153	int nr = to_sensor_dev_attr(attr)->index;
	154	struct thmc50_data *data = thmc50_update_device(dev);
	155	return sprintf(buf, "%d\n", data->temp_input[nr] * 1000);
	156	}
	157
	158	static ssize_t show_temp_min(struct device dev, struct device_attribute attr,
	159	char *buf)
	160	{
	161	int nr = to_sensor_dev_attr(attr)->index;
	162	struct thmc50_data *data = thmc50_update_device(dev);
	163	return sprintf(buf, "%d\n", data->temp_min[nr] * 1000);
	164	}
	165
	166	static ssize_t set_temp_min(struct device dev, struct device_attribute attr,
	167	const char *buf, size_t count)
	168	{
	169	int nr = to_sensor_dev_attr(attr)->index;
	170	struct i2c_client *client = to_i2c_client(dev);
	171	struct thmc50_data *data = i2c_get_clientdata(client);
172	int val = simple_strtol(buf, NULL, 10);
173
174	mutex_lock(&data->update_lock);
175	data->temp_min[nr] = SENSORS_LIMIT(val / 1000, -128, 127);
176	i2c_smbus_write_byte_data(client, THMC50_REG_TEMP_MIN[nr],
177	data->temp_min[nr]);
178	mutex_unlock(&data->update_lock);
179	return count;
180	}
181
182	static ssize_t show_temp_max(struct device dev, struct device_attribute attr,
183	char *buf)
184	{
185	int nr = to_sensor_dev_attr(attr)->index;
186	struct thmc50_data *data = thmc50_update_device(dev);
187	return sprintf(buf, "%d\n", data->temp_max[nr] * 1000);
188	}
189
190	static ssize_t set_temp_max(struct device dev, struct device_attribute attr,
191	const char *buf, size_t count)
192	{
193	int nr = to_sensor_dev_attr(attr)->index;
194	struct i2c_client *client = to_i2c_client(dev);
195	struct thmc50_data *data = i2c_get_clientdata(client);
196	int val = simple_strtol(buf, NULL, 10);
197
198	mutex_lock(&data->update_lock);
199	data->temp_max[nr] = SENSORS_LIMIT(val / 1000, -128, 127);
200	i2c_smbus_write_byte_data(client, THMC50_REG_TEMP_MAX[nr],
201	data->temp_max[nr]);
202	mutex_unlock(&data->update_lock);
203	return count;
204	}
205
84f768c1 KH	206	static ssize_t show_temp_critical(struct device *dev,
	207	struct device_attribute *attr,
	208	char *buf)
	209	{
	210	int nr = to_sensor_dev_attr(attr)->index;
	211	struct thmc50_data *data = thmc50_update_device(dev);
	212	return sprintf(buf, "%d\n", data->temp_critical[nr] * 1000);
	213	}
	214
dcf3b5fb KH	215	static ssize_t show_alarm(struct device dev, struct device_attribute attr,
	216	char *buf)
	217	{
	218	int index = to_sensor_dev_attr(attr)->index;
	219	struct thmc50_data *data = thmc50_update_device(dev);
	220
	221	return sprintf(buf, "%u\n", (data->alarms >> index) & 1);
	222	}
	223
add77c64 KH	224	#define temp_reg(offset) \
	225	static SENSOR_DEVICE_ATTR(temp##offset##_input, S_IRUGO, show_temp, \
	226	NULL, offset - 1); \
	227	static SENSOR_DEVICE_ATTR(temp##offset##_min, S_IRUGO \| S_IWUSR, \
	228	show_temp_min, set_temp_min, offset - 1); \
	229	static SENSOR_DEVICE_ATTR(temp##offset##_max, S_IRUGO \| S_IWUSR, \
84f768c1 KH	230	show_temp_max, set_temp_max, offset - 1); \
	231	static SENSOR_DEVICE_ATTR(temp##offset##_crit, S_IRUGO, \
	232	show_temp_critical, NULL, offset - 1);
add77c64 KH	233
	234	temp_reg(1);
	235	temp_reg(2);
	236	temp_reg(3);
	237
dcf3b5fb KH	238	static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 0);
	239	static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 5);
	240	static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL, 1);
	241	static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_alarm, NULL, 7);
	242	static SENSOR_DEVICE_ATTR(temp3_fault, S_IRUGO, show_alarm, NULL, 2);
	243
add77c64 KH	244	static SENSOR_DEVICE_ATTR(pwm1, S_IRUGO \| S_IWUSR, show_analog_out,
	245	set_analog_out, 0);
	246	static SENSOR_DEVICE_ATTR(pwm1_mode, S_IRUGO, show_pwm_mode, NULL, 0);
	247
	248	static struct attribute *thmc50_attributes[] = {
	249	&sensor_dev_attr_temp1_max.dev_attr.attr,
	250	&sensor_dev_attr_temp1_min.dev_attr.attr,
	251	&sensor_dev_attr_temp1_input.dev_attr.attr,
84f768c1	252	&sensor_dev_attr_temp1_crit.dev_attr.attr,
dcf3b5fb	253	&sensor_dev_attr_temp1_alarm.dev_attr.attr,
add77c64 KH	254	&sensor_dev_attr_temp2_max.dev_attr.attr,
	255	&sensor_dev_attr_temp2_min.dev_attr.attr,
	256	&sensor_dev_attr_temp2_input.dev_attr.attr,
84f768c1	257	&sensor_dev_attr_temp2_crit.dev_attr.attr,
dcf3b5fb KH	258	&sensor_dev_attr_temp2_alarm.dev_attr.attr,
dcf3b5fb KH	259	&sensor_dev_attr_temp2_fault.dev_attr.attr,
add77c64 KH	260	&sensor_dev_attr_pwm1.dev_attr.attr,
	261	&sensor_dev_attr_pwm1_mode.dev_attr.attr,
	262	NULL
	263	};
	264
	265	static const struct attribute_group thmc50_group = {
	266	.attrs = thmc50_attributes,
	267	};
	268
	269	/* for ADM1022 3rd temperature mode */
894c00cf	270	static struct attribute *temp3_attributes[] = {
add77c64 KH	271	&sensor_dev_attr_temp3_max.dev_attr.attr,
	272	&sensor_dev_attr_temp3_min.dev_attr.attr,
	273	&sensor_dev_attr_temp3_input.dev_attr.attr,
84f768c1	274	&sensor_dev_attr_temp3_crit.dev_attr.attr,
dcf3b5fb KH	275	&sensor_dev_attr_temp3_alarm.dev_attr.attr,
dcf3b5fb KH	276	&sensor_dev_attr_temp3_fault.dev_attr.attr,
add77c64 KH	277	NULL
	278	};
	279
894c00cf JD	280	static const struct attribute_group temp3_group = {
894c00cf JD	281	.attrs = temp3_attributes,
add77c64 KH	282	};
add77c64 KH	283
ccf37488 JD	284	/* Return 0 if detection is successful, -ENODEV otherwise */
	285	static int thmc50_detect(struct i2c_client *client, int kind,
	286	struct i2c_board_info *info)
add77c64 KH	287	{
	288	unsigned company;
	289	unsigned revision;
	290	unsigned config;
ccf37488	291	struct i2c_adapter *adapter = client->adapter;
cc28a610	292	const char *type_name;
add77c64 KH	293
	294	if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) {
	295	pr_debug("thmc50: detect failed, "
	296	"smbus byte data not supported!\n");
ccf37488	297	return -ENODEV;
add77c64 KH	298	}
add77c64 KH	299
add77c64 KH	300	pr_debug("thmc50: Probing for THMC50 at 0x%2X on bus %d\n",
	301	client->addr, i2c_adapter_id(client->adapter));
	302
add77c64 KH	303	company = i2c_smbus_read_byte_data(client, THMC50_REG_COMPANY_ID);
	304	revision = i2c_smbus_read_byte_data(client, THMC50_REG_DIE_CODE);
	305	config = i2c_smbus_read_byte_data(client, THMC50_REG_CONF);
52df6440 JD	306	if (revision < 0xc0 \|\| (config & 0x10))
52df6440 JD	307	return -ENODEV;
add77c64	308
52df6440	309	if (company == 0x41) {
add77c64 KH	310	int id = i2c_adapter_id(client->adapter);
	311	int i;
	312
	313	type_name = "adm1022";
add77c64 KH	314	for (i = 0; i + 1 < adm1022_temp3_num; i += 2)
add77c64 KH	315	if (adm1022_temp3[i] == id &&
ccf37488	316	adm1022_temp3[i + 1] == client->addr) {
add77c64	317	/* enable 2nd remote temp */
ccf37488 JD	318	config \|= (1 << 7);
	319	i2c_smbus_write_byte_data(client,
	320	THMC50_REG_CONF,
	321	config);
add77c64 KH	322	break;
add77c64 KH	323	}
52df6440	324	} else if (company == 0x49) {
cc28a610	325	type_name = "thmc50";
52df6440 JD	326	} else {
	327	pr_debug("thmc50: Detection of THMC50/ADM1022 failed\n");
	328	return -ENODEV;
add77c64	329	}
52df6440	330
cc28a610 JD	331	pr_debug("thmc50: Detected %s (version %x, revision %x)\n",
cc28a610 JD	332	type_name, (revision >> 4) - 0xc, revision & 0xf);
add77c64	333
ccf37488	334	strlcpy(info->type, type_name, I2C_NAME_SIZE);
add77c64	335
ccf37488 JD	336	return 0;
	337	}
	338
	339	static int thmc50_probe(struct i2c_client *client,
	340	const struct i2c_device_id *id)
	341	{
	342	struct thmc50_data *data;
	343	int err;
	344
	345	data = kzalloc(sizeof(struct thmc50_data), GFP_KERNEL);
	346	if (!data) {
	347	pr_debug("thmc50: detect failed, kzalloc failed!\n");
	348	err = -ENOMEM;
	349	goto exit;
	350	}
	351
	352	i2c_set_clientdata(client, data);
	353	data->type = id->driver_data;
	354	mutex_init(&data->update_lock);
add77c64 KH	355
	356	thmc50_init_client(client);
	357
	358	/* Register sysfs hooks */
	359	if ((err = sysfs_create_group(&client->dev.kobj, &thmc50_group)))
ccf37488	360	goto exit_free;
add77c64 KH	361
add77c64 KH	362	/* Register ADM1022 sysfs hooks */
894c00cf	363	if (data->has_temp3)
add77c64	364	if ((err = sysfs_create_group(&client->dev.kobj,
894c00cf	365	&temp3_group)))
add77c64 KH	366	goto exit_remove_sysfs_thmc50;
	367
	368	/* Register a new directory entry with module sensors */
1beeffe4 TJ	369	data->hwmon_dev = hwmon_device_register(&client->dev);
	370	if (IS_ERR(data->hwmon_dev)) {
	371	err = PTR_ERR(data->hwmon_dev);
add77c64 KH	372	goto exit_remove_sysfs;
	373	}
	374
	375	return 0;
	376
	377	exit_remove_sysfs:
894c00cf JD	378	if (data->has_temp3)
894c00cf JD	379	sysfs_remove_group(&client->dev.kobj, &temp3_group);
add77c64 KH	380	exit_remove_sysfs_thmc50:
add77c64 KH	381	sysfs_remove_group(&client->dev.kobj, &thmc50_group);
add77c64 KH	382	exit_free:
	383	kfree(data);
	384	exit:
	385	return err;
	386	}
	387
ccf37488	388	static int thmc50_remove(struct i2c_client *client)
add77c64 KH	389	{
add77c64 KH	390	struct thmc50_data *data = i2c_get_clientdata(client);
add77c64	391
1beeffe4	392	hwmon_device_unregister(data->hwmon_dev);
add77c64	393	sysfs_remove_group(&client->dev.kobj, &thmc50_group);
894c00cf JD	394	if (data->has_temp3)
894c00cf JD	395	sysfs_remove_group(&client->dev.kobj, &temp3_group);
add77c64	396
add77c64 KH	397	kfree(data);
	398
	399	return 0;
	400	}
	401
	402	static void thmc50_init_client(struct i2c_client *client)
	403	{
	404	struct thmc50_data *data = i2c_get_clientdata(client);
	405	int config;
	406
	407	data->analog_out = i2c_smbus_read_byte_data(client,
	408	THMC50_REG_ANALOG_OUT);
	409	/* set up to at least 1 */
	410	if (data->analog_out == 0) {
	411	data->analog_out = 1;
	412	i2c_smbus_write_byte_data(client, THMC50_REG_ANALOG_OUT,
	413	data->analog_out);
	414	}
	415	config = i2c_smbus_read_byte_data(client, THMC50_REG_CONF);
	416	config \|= 0x1; /* start the chip if it is in standby mode */
ccf37488 JD	417	if (data->type == adm1022 && (config & (1 << 7)))
ccf37488 JD	418	data->has_temp3 = 1;
add77c64 KH	419	i2c_smbus_write_byte_data(client, THMC50_REG_CONF, config);
	420	}
	421
	422	static struct thmc50_data thmc50_update_device(struct device dev)
	423	{
	424	struct i2c_client *client = to_i2c_client(dev);
	425	struct thmc50_data *data = i2c_get_clientdata(client);
	426	int timeout = HZ / 5 + (data->type == thmc50 ? HZ : 0);
	427
	428	mutex_lock(&data->update_lock);
	429
	430	if (time_after(jiffies, data->last_updated + timeout)
	431	\|\| !data->valid) {
	432
	433	int temps = data->has_temp3 ? 3 : 2;
	434	int i;
84f768c1 KH	435	int prog = i2c_smbus_read_byte_data(client, THMC50_REG_CONF);
	436
	437	prog &= THMC50_REG_CONF_PROGRAMMED;
	438
add77c64 KH	439	for (i = 0; i < temps; i++) {
	440	data->temp_input[i] = i2c_smbus_read_byte_data(client,
	441	THMC50_REG_TEMP[i]);
	442	data->temp_max[i] = i2c_smbus_read_byte_data(client,
	443	THMC50_REG_TEMP_MAX[i]);
	444	data->temp_min[i] = i2c_smbus_read_byte_data(client,
	445	THMC50_REG_TEMP_MIN[i]);
84f768c1 KH	446	data->temp_critical[i] =
	447	i2c_smbus_read_byte_data(client,
	448	prog ? THMC50_REG_TEMP_CRITICAL[i]
	449	: THMC50_REG_TEMP_DEFAULT[i]);
add77c64 KH	450	}
	451	data->analog_out =
	452	i2c_smbus_read_byte_data(client, THMC50_REG_ANALOG_OUT);
dcf3b5fb	453	data->alarms =
bba891c2	454	i2c_smbus_read_byte_data(client, THMC50_REG_INTR);
add77c64 KH	455	data->last_updated = jiffies;
	456	data->valid = 1;
	457	}
	458
	459	mutex_unlock(&data->update_lock);
	460
	461	return data;
	462	}
	463
	464	static int __init sm_thmc50_init(void)
	465	{
	466	return i2c_add_driver(&thmc50_driver);
	467	}
	468
	469	static void __exit sm_thmc50_exit(void)
	470	{
	471	i2c_del_driver(&thmc50_driver);
	472	}
	473
	474	MODULE_AUTHOR("Krzysztof Helt <krzysztof.h1@wp.pl>");
	475	MODULE_DESCRIPTION("THMC50 driver");
	476
	477	module_init(sm_thmc50_init);
	478	module_exit(sm_thmc50_exit);