[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>
#include <linux/jiffies.h>

MODULE_LICENSE("GPL");

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

/* Insmod parameters */
enum chips { thmc50, adm1022 };

static unsigned short adm1022_temp3[16];
static unsigned int adm1022_temp3_num;
module_param_array(adm1022_temp3, ushort, &adm1022_temp3_num, 0);
MODULE_PARM_DESC(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 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 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 config;
	unsigned long tmp;
	int err;

	err = kstrtoul(buf, 10, &tmp);
	if (err)
		return err;

	mutex_lock(&data->update_lock);
	data->analog_out = clamp_val(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);
	long val;
	int err;

	err = kstrtol(buf, 10, &val);
	if (err)
		return err;

	mutex_lock(&data->update_lock);
	data->temp_min[nr] = clamp_val(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);
	long val;
	int err;

	err = kstrtol(buf, 10, &val);
	if (err)
		return err;

	mutex_lock(&data->update_lock);
	data->temp_max[nr] = clamp_val(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,
			 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 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 int thmc50_probe(struct i2c_client *client,
			const struct i2c_device_id *id)
{
	struct thmc50_data *data;
	int err;

	data = devm_kzalloc(&client->dev, sizeof(struct thmc50_data),
			    GFP_KERNEL);
	if (!data)
		return -ENOMEM;

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

	thmc50_init_client(client);

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

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

	return 0;
}

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_list = normal_i2c,
};

module_i2c_driver(thmc50_driver);

MODULE_AUTHOR("Krzysztof Helt <krzysztof.h1@wp.pl>");
MODULE_DESCRIPTION("THMC50 driver");
Commit	Line	Data
add77c64	1	/*
4d387df7 GR	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	*/
add77c64 KH	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>
dcd8f392	31	#include <linux/jiffies.h>
add77c64 KH	32
	33	MODULE_LICENSE("GPL");
	34
	35	/* Addresses to scan */
25e9c86d	36	static const unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, I2C_CLIENT_END };
add77c64 KH	37
add77c64 KH	38	/* Insmod parameters */
e5e9f44c	39	enum chips { thmc50, adm1022 };
f95f0b4c JD	40
	41	static unsigned short adm1022_temp3[16];
	42	static unsigned int adm1022_temp3_num;
	43	module_param_array(adm1022_temp3, ushort, &adm1022_temp3_num, 0);
b55f3757 GR	44	MODULE_PARM_DESC(adm1022_temp3,
b55f3757 GR	45	"List of adapter,address pairs to enable 3rd temperature (ADM1022 only)");
add77c64 KH	46
	47	/* Many THMC50 constants specified below */
	48
	49	/* The THMC50 registers */
	50	#define THMC50_REG_CONF 0x40
	51	#define THMC50_REG_COMPANY_ID 0x3E
	52	#define THMC50_REG_DIE_CODE 0x3F
	53	#define THMC50_REG_ANALOG_OUT 0x19
dcf3b5fb	54	/*
bba891c2 KH	55	* The mirror status register cannot be used as
bba891c2 KH	56	* reading it does not clear alarms.
dcf3b5fb	57	*/
bba891c2	58	#define THMC50_REG_INTR 0x41
add77c64	59
5910a9b2 TK	60	static const u8 THMC50_REG_TEMP[] = { 0x27, 0x26, 0x20 };
	61	static const u8 THMC50_REG_TEMP_MIN[] = { 0x3A, 0x38, 0x2C };
	62	static const u8 THMC50_REG_TEMP_MAX[] = { 0x39, 0x37, 0x2B };
84f768c1 KH	63	static const u8 THMC50_REG_TEMP_CRITICAL[] = { 0x13, 0x14, 0x14 };
84f768c1 KH	64	static const u8 THMC50_REG_TEMP_DEFAULT[] = { 0x17, 0x18, 0x18 };
add77c64 KH	65
add77c64 KH	66	#define THMC50_REG_CONF_nFANOFF 0x20
84f768c1	67	#define THMC50_REG_CONF_PROGRAMMED 0x08
add77c64 KH	68
	69	/* Each client has this additional data */
	70	struct thmc50_data {
1beeffe4	71	struct device *hwmon_dev;
add77c64 KH	72
	73	struct mutex update_lock;
	74	enum chips type;
	75	unsigned long last_updated; /* In jiffies */
	76	char has_temp3; /* !=0 if it is ADM1022 in temp3 mode */
	77	char valid; /* !=0 if following fields are valid */
	78
	79	/* Register values */
	80	s8 temp_input[3];
	81	s8 temp_max[3];
	82	s8 temp_min[3];
84f768c1	83	s8 temp_critical[3];
add77c64	84	u8 analog_out;
dcf3b5fb	85	u8 alarms;
add77c64 KH	86	};
add77c64 KH	87
9b38a66e AL	88	static struct thmc50_data thmc50_update_device(struct device dev)
	89	{
	90	struct i2c_client *client = to_i2c_client(dev);
	91	struct thmc50_data *data = i2c_get_clientdata(client);
	92	int timeout = HZ / 5 + (data->type == thmc50 ? HZ : 0);
add77c64	93
9b38a66e	94	mutex_lock(&data->update_lock);
ccf37488	95
9b38a66e AL	96	if (time_after(jiffies, data->last_updated + timeout)
	97	\|\| !data->valid) {
	98
	99	int temps = data->has_temp3 ? 3 : 2;
	100	int i;
	101	int prog = i2c_smbus_read_byte_data(client, THMC50_REG_CONF);
	102
	103	prog &= THMC50_REG_CONF_PROGRAMMED;
	104
	105	for (i = 0; i < temps; i++) {
	106	data->temp_input[i] = i2c_smbus_read_byte_data(client,
	107	THMC50_REG_TEMP[i]);
	108	data->temp_max[i] = i2c_smbus_read_byte_data(client,
	109	THMC50_REG_TEMP_MAX[i]);
	110	data->temp_min[i] = i2c_smbus_read_byte_data(client,
	111	THMC50_REG_TEMP_MIN[i]);
	112	data->temp_critical[i] =
	113	i2c_smbus_read_byte_data(client,
	114	prog ? THMC50_REG_TEMP_CRITICAL[i]
	115	: THMC50_REG_TEMP_DEFAULT[i]);
	116	}
	117	data->analog_out =
	118	i2c_smbus_read_byte_data(client, THMC50_REG_ANALOG_OUT);
	119	data->alarms =
	120	i2c_smbus_read_byte_data(client, THMC50_REG_INTR);
	121	data->last_updated = jiffies;
	122	data->valid = 1;
	123	}
	124
	125	mutex_unlock(&data->update_lock);
	126
	127	return data;
	128	}
add77c64 KH	129
	130	static ssize_t show_analog_out(struct device *dev,
	131	struct device_attribute attr, char buf)
	132	{
	133	struct thmc50_data *data = thmc50_update_device(dev);
	134	return sprintf(buf, "%d\n", data->analog_out);
	135	}
	136
	137	static ssize_t set_analog_out(struct device *dev,
	138	struct device_attribute *attr,
	139	const char *buf, size_t count)
	140	{
	141	struct i2c_client *client = to_i2c_client(dev);
	142	struct thmc50_data *data = i2c_get_clientdata(client);
add77c64	143	int config;
4d387df7 GR	144	unsigned long tmp;
	145	int err;
	146
	147	err = kstrtoul(buf, 10, &tmp);
	148	if (err)
	149	return err;
add77c64 KH	150
add77c64 KH	151	mutex_lock(&data->update_lock);
2a844c14	152	data->analog_out = clamp_val(tmp, 0, 255);
add77c64 KH	153	i2c_smbus_write_byte_data(client, THMC50_REG_ANALOG_OUT,
	154	data->analog_out);
	155
	156	config = i2c_smbus_read_byte_data(client, THMC50_REG_CONF);
	157	if (data->analog_out == 0)
	158	config &= ~THMC50_REG_CONF_nFANOFF;
	159	else
	160	config \|= THMC50_REG_CONF_nFANOFF;
	161	i2c_smbus_write_byte_data(client, THMC50_REG_CONF, config);
	162
	163	mutex_unlock(&data->update_lock);
	164	return count;
	165	}
	166
	167	/* There is only one PWM mode = DC */
	168	static ssize_t show_pwm_mode(struct device dev, struct device_attribute attr,
	169	char *buf)
	170	{
	171	return sprintf(buf, "0\n");
	172	}
	173
	174	/* Temperatures */
	175	static ssize_t show_temp(struct device dev, struct device_attribute attr,
	176	char *buf)
	177	{
	178	int nr = to_sensor_dev_attr(attr)->index;
	179	struct thmc50_data *data = thmc50_update_device(dev);
	180	return sprintf(buf, "%d\n", data->temp_input[nr] * 1000);
	181	}
	182
	183	static ssize_t show_temp_min(struct device dev, struct device_attribute attr,
	184	char *buf)
	185	{
	186	int nr = to_sensor_dev_attr(attr)->index;
	187	struct thmc50_data *data = thmc50_update_device(dev);
	188	return sprintf(buf, "%d\n", data->temp_min[nr] * 1000);
	189	}
	190
	191	static ssize_t set_temp_min(struct device dev, struct device_attribute attr,
	192	const char *buf, size_t count)
	193	{
	194	int nr = to_sensor_dev_attr(attr)->index;
	195	struct i2c_client *client = to_i2c_client(dev);
	196	struct thmc50_data *data = i2c_get_clientdata(client);
4d387df7 GR	197	long val;
	198	int err;
	199
	200	err = kstrtol(buf, 10, &val);
	201	if (err)
	202	return err;
add77c64 KH	203
add77c64 KH	204	mutex_lock(&data->update_lock);
2a844c14	205	data->temp_min[nr] = clamp_val(val / 1000, -128, 127);
add77c64 KH	206	i2c_smbus_write_byte_data(client, THMC50_REG_TEMP_MIN[nr],
	207	data->temp_min[nr]);
	208	mutex_unlock(&data->update_lock);
	209	return count;
	210	}
	211
	212	static ssize_t show_temp_max(struct device dev, struct device_attribute attr,
	213	char *buf)
	214	{
	215	int nr = to_sensor_dev_attr(attr)->index;
	216	struct thmc50_data *data = thmc50_update_device(dev);
	217	return sprintf(buf, "%d\n", data->temp_max[nr] * 1000);
	218	}
	219
	220	static ssize_t set_temp_max(struct device dev, struct device_attribute attr,
	221	const char *buf, size_t count)
	222	{
	223	int nr = to_sensor_dev_attr(attr)->index;
	224	struct i2c_client *client = to_i2c_client(dev);
	225	struct thmc50_data *data = i2c_get_clientdata(client);
4d387df7 GR	226	long val;
	227	int err;
	228
	229	err = kstrtol(buf, 10, &val);
	230	if (err)
	231	return err;
add77c64 KH	232
add77c64 KH	233	mutex_lock(&data->update_lock);
2a844c14	234	data->temp_max[nr] = clamp_val(val / 1000, -128, 127);
add77c64 KH	235	i2c_smbus_write_byte_data(client, THMC50_REG_TEMP_MAX[nr],
	236	data->temp_max[nr]);
	237	mutex_unlock(&data->update_lock);
	238	return count;
	239	}
	240
84f768c1 KH	241	static ssize_t show_temp_critical(struct device *dev,
	242	struct device_attribute *attr,
	243	char *buf)
	244	{
	245	int nr = to_sensor_dev_attr(attr)->index;
	246	struct thmc50_data *data = thmc50_update_device(dev);
	247	return sprintf(buf, "%d\n", data->temp_critical[nr] * 1000);
	248	}
	249
dcf3b5fb KH	250	static ssize_t show_alarm(struct device dev, struct device_attribute attr,
	251	char *buf)
	252	{
	253	int index = to_sensor_dev_attr(attr)->index;
	254	struct thmc50_data *data = thmc50_update_device(dev);
	255
	256	return sprintf(buf, "%u\n", (data->alarms >> index) & 1);
	257	}
	258
add77c64 KH	259	#define temp_reg(offset) \
	260	static SENSOR_DEVICE_ATTR(temp##offset##_input, S_IRUGO, show_temp, \
	261	NULL, offset - 1); \
	262	static SENSOR_DEVICE_ATTR(temp##offset##_min, S_IRUGO \| S_IWUSR, \
	263	show_temp_min, set_temp_min, offset - 1); \
	264	static SENSOR_DEVICE_ATTR(temp##offset##_max, S_IRUGO \| S_IWUSR, \
84f768c1 KH	265	show_temp_max, set_temp_max, offset - 1); \
	266	static SENSOR_DEVICE_ATTR(temp##offset##_crit, S_IRUGO, \
	267	show_temp_critical, NULL, offset - 1);
add77c64 KH	268
	269	temp_reg(1);
	270	temp_reg(2);
	271	temp_reg(3);
	272
dcf3b5fb KH	273	static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 0);
	274	static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 5);
	275	static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL, 1);
	276	static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_alarm, NULL, 7);
	277	static SENSOR_DEVICE_ATTR(temp3_fault, S_IRUGO, show_alarm, NULL, 2);
	278
add77c64 KH	279	static SENSOR_DEVICE_ATTR(pwm1, S_IRUGO \| S_IWUSR, show_analog_out,
	280	set_analog_out, 0);
	281	static SENSOR_DEVICE_ATTR(pwm1_mode, S_IRUGO, show_pwm_mode, NULL, 0);
	282
	283	static struct attribute *thmc50_attributes[] = {
	284	&sensor_dev_attr_temp1_max.dev_attr.attr,
	285	&sensor_dev_attr_temp1_min.dev_attr.attr,
	286	&sensor_dev_attr_temp1_input.dev_attr.attr,
84f768c1	287	&sensor_dev_attr_temp1_crit.dev_attr.attr,
dcf3b5fb	288	&sensor_dev_attr_temp1_alarm.dev_attr.attr,
add77c64 KH	289	&sensor_dev_attr_temp2_max.dev_attr.attr,
	290	&sensor_dev_attr_temp2_min.dev_attr.attr,
	291	&sensor_dev_attr_temp2_input.dev_attr.attr,
84f768c1	292	&sensor_dev_attr_temp2_crit.dev_attr.attr,
dcf3b5fb KH	293	&sensor_dev_attr_temp2_alarm.dev_attr.attr,
dcf3b5fb KH	294	&sensor_dev_attr_temp2_fault.dev_attr.attr,
add77c64 KH	295	&sensor_dev_attr_pwm1.dev_attr.attr,
	296	&sensor_dev_attr_pwm1_mode.dev_attr.attr,
	297	NULL
	298	};
	299
	300	static const struct attribute_group thmc50_group = {
	301	.attrs = thmc50_attributes,
	302	};
	303
	304	/* for ADM1022 3rd temperature mode */
894c00cf	305	static struct attribute *temp3_attributes[] = {
add77c64 KH	306	&sensor_dev_attr_temp3_max.dev_attr.attr,
	307	&sensor_dev_attr_temp3_min.dev_attr.attr,
	308	&sensor_dev_attr_temp3_input.dev_attr.attr,
84f768c1	309	&sensor_dev_attr_temp3_crit.dev_attr.attr,
dcf3b5fb KH	310	&sensor_dev_attr_temp3_alarm.dev_attr.attr,
dcf3b5fb KH	311	&sensor_dev_attr_temp3_fault.dev_attr.attr,
add77c64 KH	312	NULL
	313	};
	314
894c00cf JD	315	static const struct attribute_group temp3_group = {
894c00cf JD	316	.attrs = temp3_attributes,
add77c64 KH	317	};
add77c64 KH	318
ccf37488	319	/* Return 0 if detection is successful, -ENODEV otherwise */
310ec792	320	static int thmc50_detect(struct i2c_client *client,
ccf37488	321	struct i2c_board_info *info)
add77c64 KH	322	{
	323	unsigned company;
	324	unsigned revision;
	325	unsigned config;
ccf37488	326	struct i2c_adapter *adapter = client->adapter;
cc28a610	327	const char *type_name;
add77c64 KH	328
add77c64 KH	329	if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) {
b55f3757	330	pr_debug("thmc50: detect failed, smbus byte data not supported!\n");
ccf37488	331	return -ENODEV;
add77c64 KH	332	}
add77c64 KH	333
add77c64 KH	334	pr_debug("thmc50: Probing for THMC50 at 0x%2X on bus %d\n",
	335	client->addr, i2c_adapter_id(client->adapter));
	336
add77c64 KH	337	company = i2c_smbus_read_byte_data(client, THMC50_REG_COMPANY_ID);
	338	revision = i2c_smbus_read_byte_data(client, THMC50_REG_DIE_CODE);
	339	config = i2c_smbus_read_byte_data(client, THMC50_REG_CONF);
52df6440 JD	340	if (revision < 0xc0 \|\| (config & 0x10))
52df6440 JD	341	return -ENODEV;
add77c64	342
52df6440	343	if (company == 0x41) {
add77c64 KH	344	int id = i2c_adapter_id(client->adapter);
	345	int i;
	346
	347	type_name = "adm1022";
add77c64 KH	348	for (i = 0; i + 1 < adm1022_temp3_num; i += 2)
add77c64 KH	349	if (adm1022_temp3[i] == id &&
ccf37488	350	adm1022_temp3[i + 1] == client->addr) {
add77c64	351	/* enable 2nd remote temp */
ccf37488 JD	352	config \|= (1 << 7);
	353	i2c_smbus_write_byte_data(client,
	354	THMC50_REG_CONF,
	355	config);
add77c64 KH	356	break;
add77c64 KH	357	}
52df6440	358	} else if (company == 0x49) {
cc28a610	359	type_name = "thmc50";
52df6440 JD	360	} else {
	361	pr_debug("thmc50: Detection of THMC50/ADM1022 failed\n");
	362	return -ENODEV;
add77c64	363	}
52df6440	364
cc28a610 JD	365	pr_debug("thmc50: Detected %s (version %x, revision %x)\n",
cc28a610 JD	366	type_name, (revision >> 4) - 0xc, revision & 0xf);
add77c64	367
ccf37488	368	strlcpy(info->type, type_name, I2C_NAME_SIZE);
add77c64	369
ccf37488 JD	370	return 0;
	371	}
	372
9b38a66e AL	373	static void thmc50_init_client(struct i2c_client *client)
	374	{
	375	struct thmc50_data *data = i2c_get_clientdata(client);
	376	int config;
	377
	378	data->analog_out = i2c_smbus_read_byte_data(client,
	379	THMC50_REG_ANALOG_OUT);
	380	/* set up to at least 1 */
	381	if (data->analog_out == 0) {
	382	data->analog_out = 1;
	383	i2c_smbus_write_byte_data(client, THMC50_REG_ANALOG_OUT,
	384	data->analog_out);
	385	}
	386	config = i2c_smbus_read_byte_data(client, THMC50_REG_CONF);
	387	config \|= 0x1; /* start the chip if it is in standby mode */
	388	if (data->type == adm1022 && (config & (1 << 7)))
	389	data->has_temp3 = 1;
	390	i2c_smbus_write_byte_data(client, THMC50_REG_CONF, config);
	391	}
	392
ccf37488 JD	393	static int thmc50_probe(struct i2c_client *client,
	394	const struct i2c_device_id *id)
	395	{
	396	struct thmc50_data *data;
	397	int err;
	398
bd91d3ba GR	399	data = devm_kzalloc(&client->dev, sizeof(struct thmc50_data),
	400	GFP_KERNEL);
	401	if (!data)
	402	return -ENOMEM;
ccf37488 JD	403
	404	i2c_set_clientdata(client, data);
	405	data->type = id->driver_data;
	406	mutex_init(&data->update_lock);
add77c64 KH	407
	408	thmc50_init_client(client);
	409
	410	/* Register sysfs hooks */
4d387df7 GR	411	err = sysfs_create_group(&client->dev.kobj, &thmc50_group);
4d387df7 GR	412	if (err)
bd91d3ba	413	return err;
add77c64 KH	414
add77c64 KH	415	/* Register ADM1022 sysfs hooks */
4d387df7 GR	416	if (data->has_temp3) {
	417	err = sysfs_create_group(&client->dev.kobj, &temp3_group);
	418	if (err)
add77c64	419	goto exit_remove_sysfs_thmc50;
4d387df7	420	}
add77c64 KH	421
add77c64 KH	422	/* Register a new directory entry with module sensors */
1beeffe4 TJ	423	data->hwmon_dev = hwmon_device_register(&client->dev);
	424	if (IS_ERR(data->hwmon_dev)) {
	425	err = PTR_ERR(data->hwmon_dev);
add77c64 KH	426	goto exit_remove_sysfs;
	427	}
	428
	429	return 0;
	430
	431	exit_remove_sysfs:
894c00cf JD	432	if (data->has_temp3)
894c00cf JD	433	sysfs_remove_group(&client->dev.kobj, &temp3_group);
add77c64 KH	434	exit_remove_sysfs_thmc50:
add77c64 KH	435	sysfs_remove_group(&client->dev.kobj, &thmc50_group);
add77c64 KH	436	return err;
	437	}
	438
ccf37488	439	static int thmc50_remove(struct i2c_client *client)
add77c64 KH	440	{
add77c64 KH	441	struct thmc50_data *data = i2c_get_clientdata(client);
add77c64	442
1beeffe4	443	hwmon_device_unregister(data->hwmon_dev);
add77c64	444	sysfs_remove_group(&client->dev.kobj, &thmc50_group);
894c00cf JD	445	if (data->has_temp3)
894c00cf JD	446	sysfs_remove_group(&client->dev.kobj, &temp3_group);
add77c64	447
add77c64 KH	448	return 0;
	449	}
	450
9b38a66e AL	451	static const struct i2c_device_id thmc50_id[] = {
	452	{ "adm1022", adm1022 },
	453	{ "thmc50", thmc50 },
	454	{ }
	455	};
	456	MODULE_DEVICE_TABLE(i2c, thmc50_id);
add77c64	457
9b38a66e AL	458	static struct i2c_driver thmc50_driver = {
	459	.class = I2C_CLASS_HWMON,
	460	.driver = {
	461	.name = "thmc50",
	462	},
	463	.probe = thmc50_probe,
	464	.remove = thmc50_remove,
	465	.id_table = thmc50_id,
	466	.detect = thmc50_detect,
	467	.address_list = normal_i2c,
	468	};
add77c64	469
f0967eea	470	module_i2c_driver(thmc50_driver);
add77c64 KH	471
	472	MODULE_AUTHOR("Krzysztof Helt <krzysztof.h1@wp.pl>");
	473	MODULE_DESCRIPTION("THMC50 driver");