| /* |
| 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 const unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, I2C_CLIENT_END }; |
| |
| /* Insmod parameters */ |
| I2C_CLIENT_INSMOD_2(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 int thmc50_detect(struct i2c_client *client, |
| struct i2c_board_info *info); |
| static int thmc50_probe(struct i2c_client *client, |
| const struct i2c_device_id *id); |
| static int thmc50_remove(struct i2c_client *client); |
| static void thmc50_init_client(struct i2c_client *client); |
| static struct thmc50_data *thmc50_update_device(struct device *dev); |
| |
| 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, |
| }; |
| |
| 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_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 int thmc50_probe(struct i2c_client *client, |
| const struct i2c_device_id *id) |
| { |
| struct thmc50_data *data; |
| int err; |
| |
| data = kzalloc(sizeof(struct thmc50_data), GFP_KERNEL); |
| if (!data) { |
| pr_debug("thmc50: detect failed, kzalloc failed!\n"); |
| err = -ENOMEM; |
| goto exit; |
| } |
| |
| i2c_set_clientdata(client, data); |
| data->type = id->driver_data; |
| mutex_init(&data->update_lock); |
| |
| thmc50_init_client(client); |
| |
| /* Register sysfs hooks */ |
| if ((err = sysfs_create_group(&client->dev.kobj, &thmc50_group))) |
| goto exit_free; |
| |
| /* 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_free: |
| kfree(data); |
| exit: |
| 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); |
| |
| 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->type == adm1022 && (config & (1 << 7))) |
| data->has_temp3 = 1; |
| 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; |
| 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 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); |