Initial import

1 files changed, 582 insertions, 0 deletions

diff --git a/drivers/hwmon/adm1025.c b/drivers/hwmon/adm1025.c
new file mode 100644
index 000000000..d6c767ace
--- /dev/null
+++ b/drivers/hwmon/adm1025.c
@@ -0,0 +1,582 @@
+/*
+ * adm1025.c
+ *
+ * Copyright (C) 2000       Chen-Yuan Wu <gwu@esoft.com>
+ * Copyright (C) 2003-2009  Jean Delvare <jdelvare@suse.de>
+ *
+ * The ADM1025 is a sensor chip made by Analog Devices. It reports up to 6
+ * voltages (including its own power source) and up to two temperatures
+ * (its own plus up to one external one). Voltages are scaled internally
+ * (which is not the common way) with ratios such that the nominal value
+ * of each voltage correspond to a register value of 192 (which means a
+ * resolution of about 0.5% of the nominal value). Temperature values are
+ * reported with a 1 deg resolution and a 3 deg accuracy. Complete
+ * datasheet can be obtained from Analog's website at:
+ *   http://www.onsemi.com/PowerSolutions/product.do?id=ADM1025
+ *
+ * This driver also supports the ADM1025A, which differs from the ADM1025
+ * only in that it has "open-drain VID inputs while the ADM1025 has
+ * on-chip 100k pull-ups on the VID inputs". It doesn't make any
+ * difference for us.
+ *
+ * This driver also supports the NE1619, a sensor chip made by Philips.
+ * That chip is similar to the ADM1025A, with a few differences. The only
+ * difference that matters to us is that the NE1619 has only two possible
+ * addresses while the ADM1025A has a third one. Complete datasheet can be
+ * obtained from Philips's website at:
+ *   http://www.semiconductors.philips.com/pip/NE1619DS.html
+ *
+ * Since the ADM1025 was the first chipset supported by this driver, most
+ * comments will refer to this chipset, but are actually general and
+ * concern all supported chipsets, unless mentioned otherwise.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/jiffies.h>
+#include <linux/i2c.h>
+#include <linux/hwmon.h>
+#include <linux/hwmon-sysfs.h>
+#include <linux/hwmon-vid.h>
+#include <linux/err.h>
+#include <linux/mutex.h>
+
+/*
+ * Addresses to scan
+ * ADM1025 and ADM1025A have three possible addresses: 0x2c, 0x2d and 0x2e.
+ * NE1619 has two possible addresses: 0x2c and 0x2d.
+ */
+
+static const unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, I2C_CLIENT_END };
+
+enum chips { adm1025, ne1619 };
+
+/*
+ * The ADM1025 registers
+ */
+
+#define ADM1025_REG_MAN_ID		0x3E
+#define ADM1025_REG_CHIP_ID		0x3F
+#define ADM1025_REG_CONFIG		0x40
+#define ADM1025_REG_STATUS1		0x41
+#define ADM1025_REG_STATUS2		0x42
+#define ADM1025_REG_IN(nr)		(0x20 + (nr))
+#define ADM1025_REG_IN_MAX(nr)		(0x2B + (nr) * 2)
+#define ADM1025_REG_IN_MIN(nr)		(0x2C + (nr) * 2)
+#define ADM1025_REG_TEMP(nr)		(0x26 + (nr))
+#define ADM1025_REG_TEMP_HIGH(nr)	(0x37 + (nr) * 2)
+#define ADM1025_REG_TEMP_LOW(nr)	(0x38 + (nr) * 2)
+#define ADM1025_REG_VID			0x47
+#define ADM1025_REG_VID4		0x49
+
+/*
+ * Conversions and various macros
+ * The ADM1025 uses signed 8-bit values for temperatures.
+ */
+
+static const int in_scale[6] = { 2500, 2250, 3300, 5000, 12000, 3300 };
+
+#define IN_FROM_REG(reg, scale)	(((reg) * (scale) + 96) / 192)
+#define IN_TO_REG(val, scale)	((val) <= 0 ? 0 : \
+				 (val) * 192 >= (scale) * 255 ? 255 : \
+				 ((val) * 192 + (scale) / 2) / (scale))
+
+#define TEMP_FROM_REG(reg)	((reg) * 1000)
+#define TEMP_TO_REG(val)	((val) <= -127500 ? -128 : \
+				 (val) >= 126500 ? 127 : \
+				 (((val) < 0 ? (val) - 500 : \
+				   (val) + 500) / 1000))
+
+/*
+ * Client data (each client gets its own)
+ */
+
+struct adm1025_data {
+	struct i2c_client *client;
+	const struct attribute_group *groups[3];
+	struct mutex update_lock;
+	char valid; /* zero until following fields are valid */
+	unsigned long last_updated; /* in jiffies */
+
+	u8 in[6];		/* register value */
+	u8 in_max[6];		/* register value */
+	u8 in_min[6];		/* register value */
+	s8 temp[2];		/* register value */
+	s8 temp_min[2];		/* register value */
+	s8 temp_max[2];		/* register value */
+	u16 alarms;		/* register values, combined */
+	u8 vid;			/* register values, combined */
+	u8 vrm;
+};
+
+static struct adm1025_data *adm1025_update_device(struct device *dev)
+{
+	struct adm1025_data *data = dev_get_drvdata(dev);
+	struct i2c_client *client = data->client;
+
+	mutex_lock(&data->update_lock);
+
+	if (time_after(jiffies, data->last_updated + HZ * 2) || !data->valid) {
+		int i;
+
+		dev_dbg(&client->dev, "Updating data.\n");
+		for (i = 0; i < 6; i++) {
+			data->in[i] = i2c_smbus_read_byte_data(client,
+				      ADM1025_REG_IN(i));
+			data->in_min[i] = i2c_smbus_read_byte_data(client,
+					  ADM1025_REG_IN_MIN(i));
+			data->in_max[i] = i2c_smbus_read_byte_data(client,
+					  ADM1025_REG_IN_MAX(i));
+		}
+		for (i = 0; i < 2; i++) {
+			data->temp[i] = i2c_smbus_read_byte_data(client,
+					ADM1025_REG_TEMP(i));
+			data->temp_min[i] = i2c_smbus_read_byte_data(client,
+					    ADM1025_REG_TEMP_LOW(i));
+			data->temp_max[i] = i2c_smbus_read_byte_data(client,
+					    ADM1025_REG_TEMP_HIGH(i));
+		}
+		data->alarms = i2c_smbus_read_byte_data(client,
+			       ADM1025_REG_STATUS1)
+			     | (i2c_smbus_read_byte_data(client,
+				ADM1025_REG_STATUS2) << 8);
+		data->vid = (i2c_smbus_read_byte_data(client,
+			     ADM1025_REG_VID) & 0x0f)
+			  | ((i2c_smbus_read_byte_data(client,
+			      ADM1025_REG_VID4) & 0x01) << 4);
+
+		data->last_updated = jiffies;
+		data->valid = 1;
+	}
+
+	mutex_unlock(&data->update_lock);
+
+	return data;
+}
+
+/*
+ * Sysfs stuff
+ */
+
+static ssize_t
+show_in(struct device *dev, struct device_attribute *attr, char *buf)
+{
+	int index = to_sensor_dev_attr(attr)->index;
+	struct adm1025_data *data = adm1025_update_device(dev);
+	return sprintf(buf, "%u\n", IN_FROM_REG(data->in[index],
+		       in_scale[index]));
+}
+
+static ssize_t
+show_in_min(struct device *dev, struct device_attribute *attr, char *buf)
+{
+	int index = to_sensor_dev_attr(attr)->index;
+	struct adm1025_data *data = adm1025_update_device(dev);
+	return sprintf(buf, "%u\n", IN_FROM_REG(data->in_min[index],
+		       in_scale[index]));
+}
+
+static ssize_t
+show_in_max(struct device *dev, struct device_attribute *attr, char *buf)
+{
+	int index = to_sensor_dev_attr(attr)->index;
+	struct adm1025_data *data = adm1025_update_device(dev);
+	return sprintf(buf, "%u\n", IN_FROM_REG(data->in_max[index],
+		       in_scale[index]));
+}
+
+static ssize_t
+show_temp(struct device *dev, struct device_attribute *attr, char *buf)
+{
+	int index = to_sensor_dev_attr(attr)->index;
+	struct adm1025_data *data = adm1025_update_device(dev);
+	return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[index]));
+}
+
+static ssize_t
+show_temp_min(struct device *dev, struct device_attribute *attr, char *buf)
+{
+	int index = to_sensor_dev_attr(attr)->index;
+	struct adm1025_data *data = adm1025_update_device(dev);
+	return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_min[index]));
+}
+
+static ssize_t
+show_temp_max(struct device *dev, struct device_attribute *attr, char *buf)
+{
+	int index = to_sensor_dev_attr(attr)->index;
+	struct adm1025_data *data = adm1025_update_device(dev);
+	return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max[index]));
+}
+
+static ssize_t set_in_min(struct device *dev, struct device_attribute *attr,
+			  const char *buf, size_t count)
+{
+	int index = to_sensor_dev_attr(attr)->index;
+	struct adm1025_data *data = dev_get_drvdata(dev);
+	struct i2c_client *client = data->client;
+	long val;
+	int err;
+
+	err = kstrtol(buf, 10, &val);
+	if (err)
+		return err;
+
+	mutex_lock(&data->update_lock);
+	data->in_min[index] = IN_TO_REG(val, in_scale[index]);
+	i2c_smbus_write_byte_data(client, ADM1025_REG_IN_MIN(index),
+				  data->in_min[index]);
+	mutex_unlock(&data->update_lock);
+	return count;
+}
+
+static ssize_t set_in_max(struct device *dev, struct device_attribute *attr,
+			  const char *buf, size_t count)
+{
+	int index = to_sensor_dev_attr(attr)->index;
+	struct adm1025_data *data = dev_get_drvdata(dev);
+	struct i2c_client *client = data->client;
+	long val;
+	int err;
+
+	err = kstrtol(buf, 10, &val);
+	if (err)
+		return err;
+
+	mutex_lock(&data->update_lock);
+	data->in_max[index] = IN_TO_REG(val, in_scale[index]);
+	i2c_smbus_write_byte_data(client, ADM1025_REG_IN_MAX(index),
+				  data->in_max[index]);
+	mutex_unlock(&data->update_lock);
+	return count;
+}
+
+#define set_in(offset) \
+static SENSOR_DEVICE_ATTR(in##offset##_input, S_IRUGO, \
+	show_in, NULL, offset); \
+static SENSOR_DEVICE_ATTR(in##offset##_min, S_IWUSR | S_IRUGO, \
+	show_in_min, set_in_min, offset); \
+static SENSOR_DEVICE_ATTR(in##offset##_max, S_IWUSR | S_IRUGO, \
+	show_in_max, set_in_max, offset)
+set_in(0);
+set_in(1);
+set_in(2);
+set_in(3);
+set_in(4);
+set_in(5);
+
+static ssize_t set_temp_min(struct device *dev, struct device_attribute *attr,
+			    const char *buf, size_t count)
+{
+	int index = to_sensor_dev_attr(attr)->index;
+	struct adm1025_data *data = dev_get_drvdata(dev);
+	struct i2c_client *client = data->client;
+	long val;
+	int err;
+
+	err = kstrtol(buf, 10, &val);
+	if (err)
+		return err;
+
+	mutex_lock(&data->update_lock);
+	data->temp_min[index] = TEMP_TO_REG(val);
+	i2c_smbus_write_byte_data(client, ADM1025_REG_TEMP_LOW(index),
+				  data->temp_min[index]);
+	mutex_unlock(&data->update_lock);
+	return count;
+}
+
+static ssize_t set_temp_max(struct device *dev, struct device_attribute *attr,
+	const char *buf, size_t count)
+{
+	int index = to_sensor_dev_attr(attr)->index;
+	struct adm1025_data *data = dev_get_drvdata(dev);
+	struct i2c_client *client = data->client;
+	long val;
+	int err;
+
+	err = kstrtol(buf, 10, &val);
+	if (err)
+		return err;
+
+	mutex_lock(&data->update_lock);
+	data->temp_max[index] = TEMP_TO_REG(val);
+	i2c_smbus_write_byte_data(client, ADM1025_REG_TEMP_HIGH(index),
+				  data->temp_max[index]);
+	mutex_unlock(&data->update_lock);
+	return count;
+}
+
+#define set_temp(offset) \
+static SENSOR_DEVICE_ATTR(temp##offset##_input, S_IRUGO, \
+	show_temp, NULL, offset - 1); \
+static SENSOR_DEVICE_ATTR(temp##offset##_min, S_IWUSR | S_IRUGO, \
+	show_temp_min, set_temp_min, offset - 1); \
+static SENSOR_DEVICE_ATTR(temp##offset##_max, S_IWUSR | S_IRUGO, \
+	show_temp_max, set_temp_max, offset - 1)
+set_temp(1);
+set_temp(2);
+
+static ssize_t
+show_alarms(struct device *dev, struct device_attribute *attr, char *buf)
+{
+	struct adm1025_data *data = adm1025_update_device(dev);
+	return sprintf(buf, "%u\n", data->alarms);
+}
+static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
+
+static ssize_t
+show_alarm(struct device *dev, struct device_attribute *attr, char *buf)
+{
+	int bitnr = to_sensor_dev_attr(attr)->index;
+	struct adm1025_data *data = adm1025_update_device(dev);
+	return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1);
+}
+static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0);
+static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 1);
+static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 2);
+static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 3);
+static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 8);
+static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 9);
+static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 5);
+static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 4);
+static SENSOR_DEVICE_ATTR(temp1_fault, S_IRUGO, show_alarm, NULL, 14);
+
+static ssize_t
+show_vid(struct device *dev, struct device_attribute *attr, char *buf)
+{
+	struct adm1025_data *data = adm1025_update_device(dev);
+	return sprintf(buf, "%u\n", vid_from_reg(data->vid, data->vrm));
+}
+static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid, NULL);
+
+static ssize_t
+show_vrm(struct device *dev, struct device_attribute *attr, char *buf)
+{
+	struct adm1025_data *data = dev_get_drvdata(dev);
+	return sprintf(buf, "%u\n", data->vrm);
+}
+static ssize_t set_vrm(struct device *dev, struct device_attribute *attr,
+		       const char *buf, size_t count)
+{
+	struct adm1025_data *data = dev_get_drvdata(dev);
+	unsigned long val;
+	int err;
+
+	err = kstrtoul(buf, 10, &val);
+	if (err)
+		return err;
+
+	if (val > 255)
+		return -EINVAL;
+
+	data->vrm = val;
+	return count;
+}
+static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm, set_vrm);
+
+/*
+ * Real code
+ */
+
+static struct attribute *adm1025_attributes[] = {
+	&sensor_dev_attr_in0_input.dev_attr.attr,
+	&sensor_dev_attr_in1_input.dev_attr.attr,
+	&sensor_dev_attr_in2_input.dev_attr.attr,
+	&sensor_dev_attr_in3_input.dev_attr.attr,
+	&sensor_dev_attr_in5_input.dev_attr.attr,
+	&sensor_dev_attr_in0_min.dev_attr.attr,
+	&sensor_dev_attr_in1_min.dev_attr.attr,
+	&sensor_dev_attr_in2_min.dev_attr.attr,
+	&sensor_dev_attr_in3_min.dev_attr.attr,
+	&sensor_dev_attr_in5_min.dev_attr.attr,
+	&sensor_dev_attr_in0_max.dev_attr.attr,
+	&sensor_dev_attr_in1_max.dev_attr.attr,
+	&sensor_dev_attr_in2_max.dev_attr.attr,
+	&sensor_dev_attr_in3_max.dev_attr.attr,
+	&sensor_dev_attr_in5_max.dev_attr.attr,
+	&sensor_dev_attr_in0_alarm.dev_attr.attr,
+	&sensor_dev_attr_in1_alarm.dev_attr.attr,
+	&sensor_dev_attr_in2_alarm.dev_attr.attr,
+	&sensor_dev_attr_in3_alarm.dev_attr.attr,
+	&sensor_dev_attr_in5_alarm.dev_attr.attr,
+	&sensor_dev_attr_temp1_input.dev_attr.attr,
+	&sensor_dev_attr_temp2_input.dev_attr.attr,
+	&sensor_dev_attr_temp1_min.dev_attr.attr,
+	&sensor_dev_attr_temp2_min.dev_attr.attr,
+	&sensor_dev_attr_temp1_max.dev_attr.attr,
+	&sensor_dev_attr_temp2_max.dev_attr.attr,
+	&sensor_dev_attr_temp1_alarm.dev_attr.attr,
+	&sensor_dev_attr_temp2_alarm.dev_attr.attr,
+	&sensor_dev_attr_temp1_fault.dev_attr.attr,
+	&dev_attr_alarms.attr,
+	&dev_attr_cpu0_vid.attr,
+	&dev_attr_vrm.attr,
+	NULL
+};
+
+static const struct attribute_group adm1025_group = {
+	.attrs = adm1025_attributes,
+};
+
+static struct attribute *adm1025_attributes_in4[] = {
+	&sensor_dev_attr_in4_input.dev_attr.attr,
+	&sensor_dev_attr_in4_min.dev_attr.attr,
+	&sensor_dev_attr_in4_max.dev_attr.attr,
+	&sensor_dev_attr_in4_alarm.dev_attr.attr,
+	NULL
+};
+
+static const struct attribute_group adm1025_group_in4 = {
+	.attrs = adm1025_attributes_in4,
+};
+
+/* Return 0 if detection is successful, -ENODEV otherwise */
+static int adm1025_detect(struct i2c_client *client,
+			  struct i2c_board_info *info)
+{
+	struct i2c_adapter *adapter = client->adapter;
+	const char *name;
+	u8 man_id, chip_id;
+
+	if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
+		return -ENODEV;
+
+	/* Check for unused bits */
+	if ((i2c_smbus_read_byte_data(client, ADM1025_REG_CONFIG) & 0x80)
+	 || (i2c_smbus_read_byte_data(client, ADM1025_REG_STATUS1) & 0xC0)
+	 || (i2c_smbus_read_byte_data(client, ADM1025_REG_STATUS2) & 0xBC)) {
+		dev_dbg(&adapter->dev, "ADM1025 detection failed at 0x%02x\n",
+			client->addr);
+		return -ENODEV;
+	}
+
+	/* Identification */
+	chip_id = i2c_smbus_read_byte_data(client, ADM1025_REG_CHIP_ID);
+	if ((chip_id & 0xF0) != 0x20)
+		return -ENODEV;
+
+	man_id = i2c_smbus_read_byte_data(client, ADM1025_REG_MAN_ID);
+	if (man_id == 0x41)
+		name = "adm1025";
+	else if (man_id == 0xA1 && client->addr != 0x2E)
+		name = "ne1619";
+	else
+		return -ENODEV;
+
+	strlcpy(info->type, name, I2C_NAME_SIZE);
+
+	return 0;
+}
+
+static void adm1025_init_client(struct i2c_client *client)
+{
+	u8 reg;
+	struct adm1025_data *data = i2c_get_clientdata(client);
+	int i;
+
+	data->vrm = vid_which_vrm();
+
+	/*
+	 * Set high limits
+	 * Usually we avoid setting limits on driver init, but it happens
+	 * that the ADM1025 comes with stupid default limits (all registers
+	 * set to 0). In case the chip has not gone through any limit
+	 * setting yet, we better set the high limits to the max so that
+	 * no alarm triggers.
+	 */
+	for (i = 0; i < 6; i++) {
+		reg = i2c_smbus_read_byte_data(client,
+					       ADM1025_REG_IN_MAX(i));
+		if (reg == 0)
+			i2c_smbus_write_byte_data(client,
+						  ADM1025_REG_IN_MAX(i),
+						  0xFF);
+	}
+	for (i = 0; i < 2; i++) {
+		reg = i2c_smbus_read_byte_data(client,
+					       ADM1025_REG_TEMP_HIGH(i));
+		if (reg == 0)
+			i2c_smbus_write_byte_data(client,
+						  ADM1025_REG_TEMP_HIGH(i),
+						  0x7F);
+	}
+
+	/*
+	 * Start the conversions
+	 */
+	reg = i2c_smbus_read_byte_data(client, ADM1025_REG_CONFIG);
+	if (!(reg & 0x01))
+		i2c_smbus_write_byte_data(client, ADM1025_REG_CONFIG,
+					  (reg&0x7E)|0x01);
+}
+
+static int adm1025_probe(struct i2c_client *client,
+			 const struct i2c_device_id *id)
+{
+	struct device *dev = &client->dev;
+	struct device *hwmon_dev;
+	struct adm1025_data *data;
+	u8 config;
+
+	data = devm_kzalloc(dev, sizeof(struct adm1025_data), GFP_KERNEL);
+	if (!data)
+		return -ENOMEM;
+
+	i2c_set_clientdata(client, data);
+	data->client = client;
+	mutex_init(&data->update_lock);
+
+	/* Initialize the ADM1025 chip */
+	adm1025_init_client(client);
+
+	/* sysfs hooks */
+	data->groups[0] = &adm1025_group;
+	/* Pin 11 is either in4 (+12V) or VID4 */
+	config = i2c_smbus_read_byte_data(client, ADM1025_REG_CONFIG);
+	if (!(config & 0x20))
+		data->groups[1] = &adm1025_group_in4;
+
+	hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name,
+							   data, data->groups);
+	return PTR_ERR_OR_ZERO(hwmon_dev);
+}
+
+static const struct i2c_device_id adm1025_id[] = {
+	{ "adm1025", adm1025 },
+	{ "ne1619", ne1619 },
+	{ }
+};
+MODULE_DEVICE_TABLE(i2c, adm1025_id);
+
+static struct i2c_driver adm1025_driver = {
+	.class		= I2C_CLASS_HWMON,
+	.driver = {
+		.name	= "adm1025",
+	},
+	.probe		= adm1025_probe,
+	.id_table	= adm1025_id,
+	.detect		= adm1025_detect,
+	.address_list	= normal_i2c,
+};
+
+module_i2c_driver(adm1025_driver);
+
+MODULE_AUTHOR("Jean Delvare <jdelvare@suse.de>");
+MODULE_DESCRIPTION("ADM1025 driver");
+MODULE_LICENSE("GPL");