[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 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

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

#define THMC50_REG_CONF_nFANOFF			0x20

/* Each client has this additional data */
struct thmc50_data {
	struct i2c_client client;
	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_attach_adapter(struct i2c_adapter *adapter);
static int thmc50_detach_client(struct i2c_client *client);
static void thmc50_init_client(struct i2c_client *client);
static struct thmc50_data *thmc50_update_device(struct device *dev);

static struct i2c_driver thmc50_driver = {
	.driver = {
		.name = "thmc50",
	},
	.attach_adapter = thmc50_attach_adapter,
	.detach_client = thmc50_detach_client,
};

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,
};

static int thmc50_detect(struct i2c_adapter *adapter, int address, int kind)
{
	unsigned company;
	unsigned revision;
	unsigned config;
	struct i2c_client *client;
	struct thmc50_data *data;
	struct device *dev;
	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");
		goto exit;
	}

	/* OK. For now, we presume we have a valid client. We now create the
	   client structure, even though we cannot fill it completely yet.
	   But it allows us to access thmc50 registers. */
	if (!(data = kzalloc(sizeof(struct thmc50_data), GFP_KERNEL))) {
		pr_debug("thmc50: detect failed, kzalloc failed!\n");
		err = -ENOMEM;
		goto exit;
	}

	client = &data->client;
	i2c_set_clientdata(client, data);
	client->addr = address;
	client->adapter = adapter;
	client->driver = &thmc50_driver;
	dev = &client->dev;

	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");
		goto exit_free;
	}
	data->type = kind;

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

		type_name = "adm1022";
		data->has_temp3 = (config >> 7) & 1;	/* config MSB */
		for (i = 0; i + 1 < adm1022_temp3_num; i += 2)
			if (adm1022_temp3[i] == id &&
			    adm1022_temp3[i + 1] == address) {
				/* enable 2nd remote temp */
				data->has_temp3 = 1;
				break;
			}
	} else {
		type_name = "thmc50";
	}
	pr_debug("thmc50: Detected %s (version %x, revision %x)\n",
		 type_name, (revision >> 4) - 0xc, revision & 0xf);

	/* Fill in the remaining client fields & put it into the global list */
	strlcpy(client->name, type_name, I2C_NAME_SIZE);
	mutex_init(&data->update_lock);

	/* Tell the I2C layer a new client has arrived */
	if ((err = i2c_attach_client(client)))
		goto exit_free;

	thmc50_init_client(client);

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

	/* 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_detach:
	i2c_detach_client(client);
exit_free:
	kfree(data);
exit:
	return err;
}

static int thmc50_attach_adapter(struct i2c_adapter *adapter)
{
	if (!(adapter->class & I2C_CLASS_HWMON))
		return 0;
	return i2c_probe(adapter, &addr_data, thmc50_detect);
}

static int thmc50_detach_client(struct i2c_client *client)
{
	struct thmc50_data *data = i2c_get_clientdata(client);
	int err;

	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);

	if ((err = i2c_detach_client(client)))
		return err;

	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->has_temp3)
		config |= 0x80;		/* enable 2nd remote temp */
	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 */
	35	static unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, I2C_CLIENT_END };
	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 KH	54
	55	const static u8 THMC50_REG_TEMP[] = { 0x27, 0x26, 0x20 };
	56	const static u8 THMC50_REG_TEMP_MIN[] = { 0x3A, 0x38, 0x2C };
	57	const static u8 THMC50_REG_TEMP_MAX[] = { 0x39, 0x37, 0x2B };
	58
	59	#define THMC50_REG_CONF_nFANOFF 0x20
	60
	61	/* Each client has this additional data */
	62	struct thmc50_data {
	63	struct i2c_client client;
1beeffe4	64	struct device *hwmon_dev;
add77c64 KH	65
	66	struct mutex update_lock;
	67	enum chips type;
	68	unsigned long last_updated; /* In jiffies */
	69	char has_temp3; /* !=0 if it is ADM1022 in temp3 mode */
	70	char valid; /* !=0 if following fields are valid */
	71
	72	/* Register values */
	73	s8 temp_input[3];
	74	s8 temp_max[3];
	75	s8 temp_min[3];
	76	u8 analog_out;
dcf3b5fb	77	u8 alarms;
add77c64 KH	78	};
	79
	80	static int thmc50_attach_adapter(struct i2c_adapter *adapter);
	81	static int thmc50_detach_client(struct i2c_client *client);
	82	static void thmc50_init_client(struct i2c_client *client);
	83	static struct thmc50_data thmc50_update_device(struct device dev);
	84
	85	static struct i2c_driver thmc50_driver = {
	86	.driver = {
	87	.name = "thmc50",
	88	},
	89	.attach_adapter = thmc50_attach_adapter,
	90	.detach_client = thmc50_detach_client,
	91	};
	92
	93	static ssize_t show_analog_out(struct device *dev,
	94	struct device_attribute attr, char buf)
	95	{
	96	struct thmc50_data *data = thmc50_update_device(dev);
	97	return sprintf(buf, "%d\n", data->analog_out);
	98	}
	99
	100	static ssize_t set_analog_out(struct device *dev,
	101	struct device_attribute *attr,
	102	const char *buf, size_t count)
	103	{
	104	struct i2c_client *client = to_i2c_client(dev);
	105	struct thmc50_data *data = i2c_get_clientdata(client);
	106	int tmp = simple_strtoul(buf, NULL, 10);
	107	int config;
	108
	109	mutex_lock(&data->update_lock);
	110	data->analog_out = SENSORS_LIMIT(tmp, 0, 255);
	111	i2c_smbus_write_byte_data(client, THMC50_REG_ANALOG_OUT,
	112	data->analog_out);
	113
	114	config = i2c_smbus_read_byte_data(client, THMC50_REG_CONF);
	115	if (data->analog_out == 0)
	116	config &= ~THMC50_REG_CONF_nFANOFF;
	117	else
	118	config \|= THMC50_REG_CONF_nFANOFF;
	119	i2c_smbus_write_byte_data(client, THMC50_REG_CONF, config);
	120
	121	mutex_unlock(&data->update_lock);
	122	return count;
	123	}
	124
	125	/* There is only one PWM mode = DC */
	126	static ssize_t show_pwm_mode(struct device dev, struct device_attribute attr,
	127	char *buf)
	128	{
	129	return sprintf(buf, "0\n");
	130	}
	131
	132	/* Temperatures */
	133	static ssize_t show_temp(struct device dev, struct device_attribute attr,
	134	char *buf)
	135	{
	136	int nr = to_sensor_dev_attr(attr)->index;
	137	struct thmc50_data *data = thmc50_update_device(dev);
	138	return sprintf(buf, "%d\n", data->temp_input[nr] * 1000);
	139	}
	140
	141	static ssize_t show_temp_min(struct device dev, struct device_attribute attr,
142	char *buf)
143	{
144	int nr = to_sensor_dev_attr(attr)->index;
145	struct thmc50_data *data = thmc50_update_device(dev);
146	return sprintf(buf, "%d\n", data->temp_min[nr] * 1000);
147	}
148
149	static ssize_t set_temp_min(struct device dev, struct device_attribute attr,
150	const char *buf, size_t count)
151	{
152	int nr = to_sensor_dev_attr(attr)->index;
153	struct i2c_client *client = to_i2c_client(dev);
154	struct thmc50_data *data = i2c_get_clientdata(client);
155	int val = simple_strtol(buf, NULL, 10);
156
157	mutex_lock(&data->update_lock);
158	data->temp_min[nr] = SENSORS_LIMIT(val / 1000, -128, 127);
159	i2c_smbus_write_byte_data(client, THMC50_REG_TEMP_MIN[nr],
160	data->temp_min[nr]);
161	mutex_unlock(&data->update_lock);
162	return count;
163	}
164
165	static ssize_t show_temp_max(struct device dev, struct device_attribute attr,
166	char *buf)
167	{
168	int nr = to_sensor_dev_attr(attr)->index;
169	struct thmc50_data *data = thmc50_update_device(dev);
170	return sprintf(buf, "%d\n", data->temp_max[nr] * 1000);
171	}
172
173	static ssize_t set_temp_max(struct device dev, struct device_attribute attr,
174	const char *buf, size_t count)
175	{
176	int nr = to_sensor_dev_attr(attr)->index;
177	struct i2c_client *client = to_i2c_client(dev);
178	struct thmc50_data *data = i2c_get_clientdata(client);
179	int val = simple_strtol(buf, NULL, 10);
180
181	mutex_lock(&data->update_lock);
182	data->temp_max[nr] = SENSORS_LIMIT(val / 1000, -128, 127);
183	i2c_smbus_write_byte_data(client, THMC50_REG_TEMP_MAX[nr],
184	data->temp_max[nr]);
185	mutex_unlock(&data->update_lock);
186	return count;
187	}
188
dcf3b5fb KH	189	static ssize_t show_alarm(struct device dev, struct device_attribute attr,
	190	char *buf)
	191	{
	192	int index = to_sensor_dev_attr(attr)->index;
	193	struct thmc50_data *data = thmc50_update_device(dev);
	194
	195	return sprintf(buf, "%u\n", (data->alarms >> index) & 1);
	196	}
	197
add77c64 KH	198	#define temp_reg(offset) \
	199	static SENSOR_DEVICE_ATTR(temp##offset##_input, S_IRUGO, show_temp, \
	200	NULL, offset - 1); \
	201	static SENSOR_DEVICE_ATTR(temp##offset##_min, S_IRUGO \| S_IWUSR, \
	202	show_temp_min, set_temp_min, offset - 1); \
	203	static SENSOR_DEVICE_ATTR(temp##offset##_max, S_IRUGO \| S_IWUSR, \
	204	show_temp_max, set_temp_max, offset - 1);
	205
	206	temp_reg(1);
	207	temp_reg(2);
	208	temp_reg(3);
	209
dcf3b5fb KH	210	static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 0);
	211	static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 5);
	212	static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL, 1);
	213	static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_alarm, NULL, 7);
	214	static SENSOR_DEVICE_ATTR(temp3_fault, S_IRUGO, show_alarm, NULL, 2);
	215
add77c64 KH	216	static SENSOR_DEVICE_ATTR(pwm1, S_IRUGO \| S_IWUSR, show_analog_out,
	217	set_analog_out, 0);
	218	static SENSOR_DEVICE_ATTR(pwm1_mode, S_IRUGO, show_pwm_mode, NULL, 0);
	219
	220	static struct attribute *thmc50_attributes[] = {
	221	&sensor_dev_attr_temp1_max.dev_attr.attr,
	222	&sensor_dev_attr_temp1_min.dev_attr.attr,
	223	&sensor_dev_attr_temp1_input.dev_attr.attr,
dcf3b5fb	224	&sensor_dev_attr_temp1_alarm.dev_attr.attr,
add77c64 KH	225	&sensor_dev_attr_temp2_max.dev_attr.attr,
	226	&sensor_dev_attr_temp2_min.dev_attr.attr,
	227	&sensor_dev_attr_temp2_input.dev_attr.attr,
dcf3b5fb KH	228	&sensor_dev_attr_temp2_alarm.dev_attr.attr,
dcf3b5fb KH	229	&sensor_dev_attr_temp2_fault.dev_attr.attr,
add77c64 KH	230	&sensor_dev_attr_pwm1.dev_attr.attr,
	231	&sensor_dev_attr_pwm1_mode.dev_attr.attr,
	232	NULL
	233	};
	234
	235	static const struct attribute_group thmc50_group = {
	236	.attrs = thmc50_attributes,
	237	};
	238
	239	/* for ADM1022 3rd temperature mode */
894c00cf	240	static struct attribute *temp3_attributes[] = {
add77c64 KH	241	&sensor_dev_attr_temp3_max.dev_attr.attr,
	242	&sensor_dev_attr_temp3_min.dev_attr.attr,
	243	&sensor_dev_attr_temp3_input.dev_attr.attr,
dcf3b5fb KH	244	&sensor_dev_attr_temp3_alarm.dev_attr.attr,
dcf3b5fb KH	245	&sensor_dev_attr_temp3_fault.dev_attr.attr,
add77c64 KH	246	NULL
	247	};
	248
894c00cf JD	249	static const struct attribute_group temp3_group = {
894c00cf JD	250	.attrs = temp3_attributes,
add77c64 KH	251	};
	252
	253	static int thmc50_detect(struct i2c_adapter *adapter, int address, int kind)
	254	{
	255	unsigned company;
	256	unsigned revision;
	257	unsigned config;
	258	struct i2c_client *client;
	259	struct thmc50_data *data;
	260	struct device *dev;
	261	int err = 0;
cc28a610	262	const char *type_name;
add77c64 KH	263
	264	if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) {
	265	pr_debug("thmc50: detect failed, "
	266	"smbus byte data not supported!\n");
	267	goto exit;
	268	}
	269
	270	/* OK. For now, we presume we have a valid client. We now create the
	271	client structure, even though we cannot fill it completely yet.
	272	But it allows us to access thmc50 registers. */
	273	if (!(data = kzalloc(sizeof(struct thmc50_data), GFP_KERNEL))) {
	274	pr_debug("thmc50: detect failed, kzalloc failed!\n");
	275	err = -ENOMEM;
	276	goto exit;
	277	}
	278
	279	client = &data->client;
	280	i2c_set_clientdata(client, data);
	281	client->addr = address;
	282	client->adapter = adapter;
	283	client->driver = &thmc50_driver;
	284	dev = &client->dev;
	285
	286	pr_debug("thmc50: Probing for THMC50 at 0x%2X on bus %d\n",
	287	client->addr, i2c_adapter_id(client->adapter));
	288
	289	/* Now, we do the remaining detection. */
	290	company = i2c_smbus_read_byte_data(client, THMC50_REG_COMPANY_ID);
	291	revision = i2c_smbus_read_byte_data(client, THMC50_REG_DIE_CODE);
	292	config = i2c_smbus_read_byte_data(client, THMC50_REG_CONF);
	293
	294	if (kind == 0)
	295	kind = thmc50;
	296	else if (kind < 0) {
	297	err = -ENODEV;
	298	if (revision >= 0xc0 && ((config & 0x10) == 0)) {
	299	if (company == 0x49) {
	300	kind = thmc50;
	301	err = 0;
	302	} else if (company == 0x41) {
	303	kind = adm1022;
	304	err = 0;
	305	}
	306	}
	307	}
	308	if (err == -ENODEV) {
	309	pr_debug("thmc50: Detection of THMC50/ADM1022 failed\n");
	310	goto exit_free;
	311	}
add77c64 KH	312	data->type = kind;
add77c64 KH	313
cc28a610	314	if (kind == adm1022) {
add77c64 KH	315	int id = i2c_adapter_id(client->adapter);
	316	int i;
	317
	318	type_name = "adm1022";
	319	data->has_temp3 = (config >> 7) & 1; /* config MSB */
	320	for (i = 0; i + 1 < adm1022_temp3_num; i += 2)
	321	if (adm1022_temp3[i] == id &&
	322	adm1022_temp3[i + 1] == address) {
	323	/* enable 2nd remote temp */
	324	data->has_temp3 = 1;
	325	break;
	326	}
cc28a610 JD	327	} else {
cc28a610 JD	328	type_name = "thmc50";
add77c64	329	}
cc28a610 JD	330	pr_debug("thmc50: Detected %s (version %x, revision %x)\n",
cc28a610 JD	331	type_name, (revision >> 4) - 0xc, revision & 0xf);
add77c64 KH	332
	333	/* Fill in the remaining client fields & put it into the global list */
	334	strlcpy(client->name, type_name, I2C_NAME_SIZE);
	335	mutex_init(&data->update_lock);
	336
	337	/* Tell the I2C layer a new client has arrived */
	338	if ((err = i2c_attach_client(client)))
	339	goto exit_free;
	340
	341	thmc50_init_client(client);
	342
	343	/* Register sysfs hooks */
	344	if ((err = sysfs_create_group(&client->dev.kobj, &thmc50_group)))
	345	goto exit_detach;
	346
	347	/* Register ADM1022 sysfs hooks */
894c00cf	348	if (data->has_temp3)
add77c64	349	if ((err = sysfs_create_group(&client->dev.kobj,
894c00cf	350	&temp3_group)))
add77c64 KH	351	goto exit_remove_sysfs_thmc50;
	352
	353	/* Register a new directory entry with module sensors */
1beeffe4 TJ	354	data->hwmon_dev = hwmon_device_register(&client->dev);
	355	if (IS_ERR(data->hwmon_dev)) {
	356	err = PTR_ERR(data->hwmon_dev);
add77c64 KH	357	goto exit_remove_sysfs;
	358	}
	359
	360	return 0;
	361
	362	exit_remove_sysfs:
894c00cf JD	363	if (data->has_temp3)
894c00cf JD	364	sysfs_remove_group(&client->dev.kobj, &temp3_group);
add77c64 KH	365	exit_remove_sysfs_thmc50:
	366	sysfs_remove_group(&client->dev.kobj, &thmc50_group);
	367	exit_detach:
	368	i2c_detach_client(client);
	369	exit_free:
	370	kfree(data);
	371	exit:
	372	return err;
	373	}
	374
	375	static int thmc50_attach_adapter(struct i2c_adapter *adapter)
	376	{
	377	if (!(adapter->class & I2C_CLASS_HWMON))
	378	return 0;
	379	return i2c_probe(adapter, &addr_data, thmc50_detect);
	380	}
	381
	382	static int thmc50_detach_client(struct i2c_client *client)
	383	{
	384	struct thmc50_data *data = i2c_get_clientdata(client);
	385	int err;
	386
1beeffe4	387	hwmon_device_unregister(data->hwmon_dev);
add77c64	388	sysfs_remove_group(&client->dev.kobj, &thmc50_group);
894c00cf JD	389	if (data->has_temp3)
894c00cf JD	390	sysfs_remove_group(&client->dev.kobj, &temp3_group);
add77c64 KH	391
	392	if ((err = i2c_detach_client(client)))
	393	return err;
	394
	395	kfree(data);
	396
	397	return 0;
	398	}
	399
	400	static void thmc50_init_client(struct i2c_client *client)
	401	{
	402	struct thmc50_data *data = i2c_get_clientdata(client);
	403	int config;
	404
	405	data->analog_out = i2c_smbus_read_byte_data(client,
	406	THMC50_REG_ANALOG_OUT);
	407	/* set up to at least 1 */
	408	if (data->analog_out == 0) {
	409	data->analog_out = 1;
	410	i2c_smbus_write_byte_data(client, THMC50_REG_ANALOG_OUT,
	411	data->analog_out);
	412	}
	413	config = i2c_smbus_read_byte_data(client, THMC50_REG_CONF);
	414	config \|= 0x1; /* start the chip if it is in standby mode */
	415	if (data->has_temp3)
	416	config \|= 0x80; /* enable 2nd remote temp */
	417	i2c_smbus_write_byte_data(client, THMC50_REG_CONF, config);
	418	}
	419
	420	static struct thmc50_data thmc50_update_device(struct device dev)
	421	{
	422	struct i2c_client *client = to_i2c_client(dev);
	423	struct thmc50_data *data = i2c_get_clientdata(client);
	424	int timeout = HZ / 5 + (data->type == thmc50 ? HZ : 0);
	425
	426	mutex_lock(&data->update_lock);
	427
	428	if (time_after(jiffies, data->last_updated + timeout)
	429	\|\| !data->valid) {
	430
	431	int temps = data->has_temp3 ? 3 : 2;
	432	int i;
	433	for (i = 0; i < temps; i++) {
	434	data->temp_input[i] = i2c_smbus_read_byte_data(client,
	435	THMC50_REG_TEMP[i]);
	436	data->temp_max[i] = i2c_smbus_read_byte_data(client,
	437	THMC50_REG_TEMP_MAX[i]);
	438	data->temp_min[i] = i2c_smbus_read_byte_data(client,
	439	THMC50_REG_TEMP_MIN[i]);
	440	}
	441	data->analog_out =
	442	i2c_smbus_read_byte_data(client, THMC50_REG_ANALOG_OUT);
dcf3b5fb	443	data->alarms =
bba891c2	444	i2c_smbus_read_byte_data(client, THMC50_REG_INTR);
add77c64 KH	445	data->last_updated = jiffies;
	446	data->valid = 1;
	447	}
	448
	449	mutex_unlock(&data->update_lock);
	450
	451	return data;
	452	}
	453
	454	static int __init sm_thmc50_init(void)
	455	{
	456	return i2c_add_driver(&thmc50_driver);
	457	}
	458
	459	static void __exit sm_thmc50_exit(void)
	460	{
	461	i2c_del_driver(&thmc50_driver);
	462	}
	463
	464	MODULE_AUTHOR("Krzysztof Helt <krzysztof.h1@wp.pl>");
	465	MODULE_DESCRIPTION("THMC50 driver");
	466
	467	module_init(sm_thmc50_init);
	468	module_exit(sm_thmc50_exit);