diff options
Diffstat (limited to 'drivers/hwmon/adm1021.c')
-rw-r--r-- | drivers/hwmon/adm1021.c | 469 |
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) |