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-rw-r--r--drivers/hwmon/adm1021.c469
1 files changed, 469 insertions, 0 deletions
diff --git a/drivers/hwmon/adm1021.c b/drivers/hwmon/adm1021.c
new file mode 100644
index 0000000..b11e06f
--- /dev/null
+++ b/drivers/hwmon/adm1021.c
@@ -0,0 +1,469 @@
+/*
+ adm1021.c - Part of lm_sensors, Linux kernel modules for hardware
+ monitoring
+ Copyright (c) 1998, 1999 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/jiffies.h>
+#include <linux/i2c.h>
+#include <linux/hwmon.h>
+#include <linux/hwmon-sysfs.h>
+#include <linux/err.h>
+#include <linux/mutex.h>
+
+
+/* Addresses to scan */
+static const unsigned short normal_i2c[] = {
+ 0x18, 0x19, 0x1a, 0x29, 0x2a, 0x2b, 0x4c, 0x4d, 0x4e, I2C_CLIENT_END };
+
+/* Insmod parameters */
+I2C_CLIENT_INSMOD_8(adm1021, adm1023, max1617, max1617a, thmc10, lm84, gl523sm,
+ mc1066);
+
+/* adm1021 constants specified below */
+
+/* The adm1021 registers */
+/* Read-only */
+/* For nr in 0-1 */
+#define ADM1021_REG_TEMP(nr) (nr)
+#define ADM1021_REG_STATUS 0x02
+/* 0x41 = AD, 0x49 = TI, 0x4D = Maxim, 0x23 = Genesys , 0x54 = Onsemi */
+#define ADM1021_REG_MAN_ID 0xFE
+/* ADM1021 = 0x0X, ADM1023 = 0x3X */
+#define ADM1021_REG_DEV_ID 0xFF
+/* These use different addresses for reading/writing */
+#define ADM1021_REG_CONFIG_R 0x03
+#define ADM1021_REG_CONFIG_W 0x09
+#define ADM1021_REG_CONV_RATE_R 0x04
+#define ADM1021_REG_CONV_RATE_W 0x0A
+/* These are for the ADM1023's additional precision on the remote temp sensor */
+#define ADM1023_REG_REM_TEMP_PREC 0x10
+#define ADM1023_REG_REM_OFFSET 0x11
+#define ADM1023_REG_REM_OFFSET_PREC 0x12
+#define ADM1023_REG_REM_TOS_PREC 0x13
+#define ADM1023_REG_REM_THYST_PREC 0x14
+/* limits */
+/* For nr in 0-1 */
+#define ADM1021_REG_TOS_R(nr) (0x05 + 2 * (nr))
+#define ADM1021_REG_TOS_W(nr) (0x0B + 2 * (nr))
+#define ADM1021_REG_THYST_R(nr) (0x06 + 2 * (nr))
+#define ADM1021_REG_THYST_W(nr) (0x0C + 2 * (nr))
+/* write-only */
+#define ADM1021_REG_ONESHOT 0x0F
+
+/* Initial values */
+
+/* Note: Even though I left the low and high limits named os and hyst,
+they don't quite work like a thermostat the way the LM75 does. I.e.,
+a lower temp than THYST actually triggers an alarm instead of
+clearing it. Weird, ey? --Phil */
+
+/* Each client has this additional data */
+struct adm1021_data {
+ struct device *hwmon_dev;
+ enum chips type;
+
+ struct mutex update_lock;
+ char valid; /* !=0 if following fields are valid */
+ unsigned long last_updated; /* In jiffies */
+
+ s8 temp_max[2]; /* Register values */
+ s8 temp_min[2];
+ s8 temp[2];
+ u8 alarms;
+ /* Special values for ADM1023 only */
+ u8 remote_temp_prec;
+ u8 remote_temp_os_prec;
+ u8 remote_temp_hyst_prec;
+ u8 remote_temp_offset;
+ u8 remote_temp_offset_prec;
+};
+
+static int adm1021_probe(struct i2c_client *client,
+ const struct i2c_device_id *id);
+static int adm1021_detect(struct i2c_client *client, int kind,
+ struct i2c_board_info *info);
+static void adm1021_init_client(struct i2c_client *client);
+static int adm1021_remove(struct i2c_client *client);
+static struct adm1021_data *adm1021_update_device(struct device *dev);
+
+/* (amalysh) read only mode, otherwise any limit's writing confuse BIOS */
+static int read_only;
+
+
+static const struct i2c_device_id adm1021_id[] = {
+ { "adm1021", adm1021 },
+ { "adm1023", adm1023 },
+ { "max1617", max1617 },
+ { "max1617a", max1617a },
+ { "thmc10", thmc10 },
+ { "lm84", lm84 },
+ { "gl523sm", gl523sm },
+ { "mc1066", mc1066 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, adm1021_id);
+
+/* This is the driver that will be inserted */
+static struct i2c_driver adm1021_driver = {
+ .class = I2C_CLASS_HWMON,
+ .driver = {
+ .name = "adm1021",
+ },
+ .probe = adm1021_probe,
+ .remove = adm1021_remove,
+ .id_table = adm1021_id,
+ .detect = adm1021_detect,
+ .address_data = &addr_data,
+};
+
+static ssize_t show_temp(struct device *dev,
+ struct device_attribute *devattr, char *buf)
+{
+ int index = to_sensor_dev_attr(devattr)->index;
+ struct adm1021_data *data = adm1021_update_device(dev);
+
+ return sprintf(buf, "%d\n", 1000 * data->temp[index]);
+}
+
+static ssize_t show_temp_max(struct device *dev,
+ struct device_attribute *devattr, char *buf)
+{
+ int index = to_sensor_dev_attr(devattr)->index;
+ struct adm1021_data *data = adm1021_update_device(dev);
+
+ return sprintf(buf, "%d\n", 1000 * data->temp_max[index]);
+}
+
+static ssize_t show_temp_min(struct device *dev,
+ struct device_attribute *devattr, char *buf)
+{
+ int index = to_sensor_dev_attr(devattr)->index;
+ struct adm1021_data *data = adm1021_update_device(dev);
+
+ return sprintf(buf, "%d\n", 1000 * data->temp_min[index]);
+}
+
+static ssize_t show_alarm(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ int index = to_sensor_dev_attr(attr)->index;
+ struct adm1021_data *data = adm1021_update_device(dev);
+ return sprintf(buf, "%u\n", (data->alarms >> index) & 1);
+}
+
+static ssize_t show_alarms(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct adm1021_data *data = adm1021_update_device(dev);
+ return sprintf(buf, "%u\n", data->alarms);
+}
+
+static ssize_t set_temp_max(struct device *dev,
+ struct device_attribute *devattr,
+ const char *buf, size_t count)
+{
+ int index = to_sensor_dev_attr(devattr)->index;
+ struct i2c_client *client = to_i2c_client(dev);
+ struct adm1021_data *data = i2c_get_clientdata(client);
+ long temp = simple_strtol(buf, NULL, 10) / 1000;
+
+ mutex_lock(&data->update_lock);
+ data->temp_max[index] = SENSORS_LIMIT(temp, -128, 127);
+ if (!read_only)
+ i2c_smbus_write_byte_data(client, ADM1021_REG_TOS_W(index),
+ data->temp_max[index]);
+ mutex_unlock(&data->update_lock);
+
+ return count;
+}
+
+static ssize_t set_temp_min(struct device *dev,
+ struct device_attribute *devattr,
+ const char *buf, size_t count)
+{
+ int index = to_sensor_dev_attr(devattr)->index;
+ struct i2c_client *client = to_i2c_client(dev);
+ struct adm1021_data *data = i2c_get_clientdata(client);
+ long temp = simple_strtol(buf, NULL, 10) / 1000;
+
+ mutex_lock(&data->update_lock);
+ data->temp_min[index] = SENSORS_LIMIT(temp, -128, 127);
+ if (!read_only)
+ i2c_smbus_write_byte_data(client, ADM1021_REG_THYST_W(index),
+ data->temp_min[index]);
+ mutex_unlock(&data->update_lock);
+
+ return count;
+}
+
+static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL, 0);
+static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, show_temp_max,
+ set_temp_max, 0);
+static SENSOR_DEVICE_ATTR(temp1_min, S_IWUSR | S_IRUGO, show_temp_min,
+ set_temp_min, 0);
+static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp, NULL, 1);
+static SENSOR_DEVICE_ATTR(temp2_max, S_IWUSR | S_IRUGO, show_temp_max,
+ set_temp_max, 1);
+static SENSOR_DEVICE_ATTR(temp2_min, S_IWUSR | S_IRUGO, show_temp_min,
+ set_temp_min, 1);
+static SENSOR_DEVICE_ATTR(temp1_max_alarm, S_IRUGO, show_alarm, NULL, 6);
+static SENSOR_DEVICE_ATTR(temp1_min_alarm, S_IRUGO, show_alarm, NULL, 5);
+static SENSOR_DEVICE_ATTR(temp2_max_alarm, S_IRUGO, show_alarm, NULL, 4);
+static SENSOR_DEVICE_ATTR(temp2_min_alarm, S_IRUGO, show_alarm, NULL, 3);
+static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_alarm, NULL, 2);
+
+static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
+
+static struct attribute *adm1021_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_temp2_max.dev_attr.attr,
+ &sensor_dev_attr_temp2_min.dev_attr.attr,
+ &sensor_dev_attr_temp2_input.dev_attr.attr,
+ &sensor_dev_attr_temp1_max_alarm.dev_attr.attr,
+ &sensor_dev_attr_temp1_min_alarm.dev_attr.attr,
+ &sensor_dev_attr_temp2_max_alarm.dev_attr.attr,
+ &sensor_dev_attr_temp2_min_alarm.dev_attr.attr,
+ &sensor_dev_attr_temp2_fault.dev_attr.attr,
+ &dev_attr_alarms.attr,
+ NULL
+};
+
+static const struct attribute_group adm1021_group = {
+ .attrs = adm1021_attributes,
+};
+
+/* Return 0 if detection is successful, -ENODEV otherwise */
+static int adm1021_detect(struct i2c_client *client, int kind,
+ struct i2c_board_info *info)
+{
+ struct i2c_adapter *adapter = client->adapter;
+ int i;
+ const char *type_name = "";
+ int conv_rate, status, config;
+
+ if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) {
+ pr_debug("adm1021: detect failed, "
+ "smbus byte data not supported!\n");
+ return -ENODEV;
+ }
+
+ status = i2c_smbus_read_byte_data(client, ADM1021_REG_STATUS);
+ conv_rate = i2c_smbus_read_byte_data(client,
+ ADM1021_REG_CONV_RATE_R);
+ config = i2c_smbus_read_byte_data(client, ADM1021_REG_CONFIG_R);
+
+ /* Now, we do the remaining detection. */
+ if (kind < 0) {
+ if ((status & 0x03) != 0x00 || (config & 0x3F) != 0x00
+ || (conv_rate & 0xF8) != 0x00) {
+ pr_debug("adm1021: detect failed, "
+ "chip not detected!\n");
+ return -ENODEV;
+ }
+ }
+
+ /* Determine the chip type. */
+ if (kind <= 0) {
+ i = i2c_smbus_read_byte_data(client, ADM1021_REG_MAN_ID);
+ if (i == 0x41)
+ if ((i2c_smbus_read_byte_data(client,
+ ADM1021_REG_DEV_ID) & 0xF0) == 0x30)
+ kind = adm1023;
+ else
+ kind = adm1021;
+ else if (i == 0x49)
+ kind = thmc10;
+ else if (i == 0x23)
+ kind = gl523sm;
+ else if ((i == 0x4d) &&
+ (i2c_smbus_read_byte_data(client,
+ ADM1021_REG_DEV_ID) == 0x01))
+ kind = max1617a;
+ else if (i == 0x54)
+ kind = mc1066;
+ /* LM84 Mfr ID in a different place, and it has more unused bits */
+ else if (conv_rate == 0x00
+ && (kind == 0 /* skip extra detection */
+ || ((config & 0x7F) == 0x00
+ && (status & 0xAB) == 0x00)))
+ kind = lm84;
+ else
+ kind = max1617;
+ }
+
+ if (kind == max1617) {
+ type_name = "max1617";
+ } else if (kind == max1617a) {
+ type_name = "max1617a";
+ } else if (kind == adm1021) {
+ type_name = "adm1021";
+ } else if (kind == adm1023) {
+ type_name = "adm1023";
+ } else if (kind == thmc10) {
+ type_name = "thmc10";
+ } else if (kind == lm84) {
+ type_name = "lm84";
+ } else if (kind == gl523sm) {
+ type_name = "gl523sm";
+ } else if (kind == mc1066) {
+ type_name = "mc1066";
+ }
+ pr_debug("adm1021: Detected chip %s at adapter %d, address 0x%02x.\n",
+ type_name, i2c_adapter_id(adapter), client->addr);
+ strlcpy(info->type, type_name, I2C_NAME_SIZE);
+
+ return 0;
+}
+
+static int adm1021_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct adm1021_data *data;
+ int err;
+
+ data = kzalloc(sizeof(struct adm1021_data), GFP_KERNEL);
+ if (!data) {
+ pr_debug("adm1021: detect failed, kzalloc failed!\n");
+ err = -ENOMEM;
+ goto error0;
+ }
+
+ i2c_set_clientdata(client, data);
+ data->type = id->driver_data;
+ mutex_init(&data->update_lock);
+
+ /* Initialize the ADM1021 chip */
+ if (data->type != lm84 && !read_only)
+ adm1021_init_client(client);
+
+ /* Register sysfs hooks */
+ if ((err = sysfs_create_group(&client->dev.kobj, &adm1021_group)))
+ goto error1;
+
+ data->hwmon_dev = hwmon_device_register(&client->dev);
+ if (IS_ERR(data->hwmon_dev)) {
+ err = PTR_ERR(data->hwmon_dev);
+ goto error3;
+ }
+
+ return 0;
+
+error3:
+ sysfs_remove_group(&client->dev.kobj, &adm1021_group);
+error1:
+ kfree(data);
+error0:
+ return err;
+}
+
+static void adm1021_init_client(struct i2c_client *client)
+{
+ /* Enable ADC and disable suspend mode */
+ i2c_smbus_write_byte_data(client, ADM1021_REG_CONFIG_W,
+ i2c_smbus_read_byte_data(client, ADM1021_REG_CONFIG_R) & 0xBF);
+ /* Set Conversion rate to 1/sec (this can be tinkered with) */
+ i2c_smbus_write_byte_data(client, ADM1021_REG_CONV_RATE_W, 0x04);
+}
+
+static int adm1021_remove(struct i2c_client *client)
+{
+ struct adm1021_data *data = i2c_get_clientdata(client);
+
+ hwmon_device_unregister(data->hwmon_dev);
+ sysfs_remove_group(&client->dev.kobj, &adm1021_group);
+
+ kfree(data);
+ return 0;
+}
+
+static struct adm1021_data *adm1021_update_device(struct device *dev)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ struct adm1021_data *data = i2c_get_clientdata(client);
+
+ mutex_lock(&data->update_lock);
+
+ if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
+ || !data->valid) {
+ int i;
+
+ dev_dbg(&client->dev, "Starting adm1021 update\n");
+
+ for (i = 0; i < 2; i++) {
+ data->temp[i] = i2c_smbus_read_byte_data(client,
+ ADM1021_REG_TEMP(i));
+ data->temp_max[i] = i2c_smbus_read_byte_data(client,
+ ADM1021_REG_TOS_R(i));
+ data->temp_min[i] = i2c_smbus_read_byte_data(client,
+ ADM1021_REG_THYST_R(i));
+ }
+ data->alarms = i2c_smbus_read_byte_data(client,
+ ADM1021_REG_STATUS) & 0x7c;
+ if (data->type == adm1023) {
+ data->remote_temp_prec =
+ i2c_smbus_read_byte_data(client,
+ ADM1023_REG_REM_TEMP_PREC);
+ data->remote_temp_os_prec =
+ i2c_smbus_read_byte_data(client,
+ ADM1023_REG_REM_TOS_PREC);
+ data->remote_temp_hyst_prec =
+ i2c_smbus_read_byte_data(client,
+ ADM1023_REG_REM_THYST_PREC);
+ data->remote_temp_offset =
+ i2c_smbus_read_byte_data(client,
+ ADM1023_REG_REM_OFFSET);
+ data->remote_temp_offset_prec =
+ i2c_smbus_read_byte_data(client,
+ ADM1023_REG_REM_OFFSET_PREC);
+ }
+ data->last_updated = jiffies;
+ data->valid = 1;
+ }
+
+ mutex_unlock(&data->update_lock);
+
+ return data;
+}
+
+static int __init sensors_adm1021_init(void)
+{
+ return i2c_add_driver(&adm1021_driver);
+}
+
+static void __exit sensors_adm1021_exit(void)
+{
+ i2c_del_driver(&adm1021_driver);
+}
+
+MODULE_AUTHOR ("Frodo Looijaard <frodol@dds.nl> and "
+ "Philip Edelbrock <phil@netroedge.com>");
+MODULE_DESCRIPTION("adm1021 driver");
+MODULE_LICENSE("GPL");
+
+module_param(read_only, bool, 0);
+MODULE_PARM_DESC(read_only, "Don't set any values, read only mode");
+
+module_init(sensors_adm1021_init)
+module_exit(sensors_adm1021_exit)
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