diff options
Diffstat (limited to 'drivers/hwmon/adm1029.c')
| -rw-r--r-- | drivers/hwmon/adm1029.c | 402 |
1 files changed, 402 insertions, 0 deletions
diff --git a/drivers/hwmon/adm1029.c b/drivers/hwmon/adm1029.c new file mode 100644 index 000000000..50b1df7b0 --- /dev/null +++ b/drivers/hwmon/adm1029.c @@ -0,0 +1,402 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * adm1029.c - Part of lm_sensors, Linux kernel modules for hardware monitoring + * + * Copyright (C) 2006 Corentin LABBE <clabbe.montjoie@gmail.com> + * + * Based on LM83 Driver by Jean Delvare <jdelvare@suse.de> + * + * Give only processor, motherboard temperatures and fan tachs + * Very rare chip please let me know if you use it + * + * http://www.analog.com/UploadedFiles/Data_Sheets/ADM1029.pdf + */ + +#include <linux/module.h> +#include <linux/init.h> +#include <linux/slab.h> +#include <linux/jiffies.h> +#include <linux/i2c.h> +#include <linux/hwmon-sysfs.h> +#include <linux/hwmon.h> +#include <linux/err.h> +#include <linux/mutex.h> + +/* + * Addresses to scan + */ + +static const unsigned short normal_i2c[] = { 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, + 0x2e, 0x2f, I2C_CLIENT_END +}; + +/* + * The ADM1029 registers + * Manufacturer ID is 0x41 for Analog Devices + */ + +#define ADM1029_REG_MAN_ID 0x0D +#define ADM1029_REG_CHIP_ID 0x0E +#define ADM1029_REG_CONFIG 0x01 +#define ADM1029_REG_NB_FAN_SUPPORT 0x02 + +#define ADM1029_REG_TEMP_DEVICES_INSTALLED 0x06 + +#define ADM1029_REG_LOCAL_TEMP 0xA0 +#define ADM1029_REG_REMOTE1_TEMP 0xA1 +#define ADM1029_REG_REMOTE2_TEMP 0xA2 + +#define ADM1029_REG_LOCAL_TEMP_HIGH 0x90 +#define ADM1029_REG_REMOTE1_TEMP_HIGH 0x91 +#define ADM1029_REG_REMOTE2_TEMP_HIGH 0x92 + +#define ADM1029_REG_LOCAL_TEMP_LOW 0x98 +#define ADM1029_REG_REMOTE1_TEMP_LOW 0x99 +#define ADM1029_REG_REMOTE2_TEMP_LOW 0x9A + +#define ADM1029_REG_FAN1 0x70 +#define ADM1029_REG_FAN2 0x71 + +#define ADM1029_REG_FAN1_MIN 0x78 +#define ADM1029_REG_FAN2_MIN 0x79 + +#define ADM1029_REG_FAN1_CONFIG 0x68 +#define ADM1029_REG_FAN2_CONFIG 0x69 + +#define TEMP_FROM_REG(val) ((val) * 1000) + +#define DIV_FROM_REG(val) (1 << (((val) >> 6) - 1)) + +/* Registers to be checked by adm1029_update_device() */ +static const u8 ADM1029_REG_TEMP[] = { + ADM1029_REG_LOCAL_TEMP, + ADM1029_REG_REMOTE1_TEMP, + ADM1029_REG_REMOTE2_TEMP, + ADM1029_REG_LOCAL_TEMP_HIGH, + ADM1029_REG_REMOTE1_TEMP_HIGH, + ADM1029_REG_REMOTE2_TEMP_HIGH, + ADM1029_REG_LOCAL_TEMP_LOW, + ADM1029_REG_REMOTE1_TEMP_LOW, + ADM1029_REG_REMOTE2_TEMP_LOW, +}; + +static const u8 ADM1029_REG_FAN[] = { + ADM1029_REG_FAN1, + ADM1029_REG_FAN2, + ADM1029_REG_FAN1_MIN, + ADM1029_REG_FAN2_MIN, +}; + +static const u8 ADM1029_REG_FAN_DIV[] = { + ADM1029_REG_FAN1_CONFIG, + ADM1029_REG_FAN2_CONFIG, +}; + +/* + * Client data (each client gets its own) + */ + +struct adm1029_data { + struct i2c_client *client; + struct mutex update_lock; /* protect register access */ + char valid; /* zero until following fields are valid */ + unsigned long last_updated; /* in jiffies */ + + /* registers values, signed for temperature, unsigned for other stuff */ + s8 temp[ARRAY_SIZE(ADM1029_REG_TEMP)]; + u8 fan[ARRAY_SIZE(ADM1029_REG_FAN)]; + u8 fan_div[ARRAY_SIZE(ADM1029_REG_FAN_DIV)]; +}; + +/* + * function that update the status of the chips (temperature for example) + */ +static struct adm1029_data *adm1029_update_device(struct device *dev) +{ + struct adm1029_data *data = dev_get_drvdata(dev); + struct i2c_client *client = data->client; + + mutex_lock(&data->update_lock); + /* + * Use the "cache" Luke, don't recheck values + * if there are already checked not a long time later + */ + if (time_after(jiffies, data->last_updated + HZ * 2) || !data->valid) { + int nr; + + dev_dbg(&client->dev, "Updating adm1029 data\n"); + + for (nr = 0; nr < ARRAY_SIZE(ADM1029_REG_TEMP); nr++) { + data->temp[nr] = + i2c_smbus_read_byte_data(client, + ADM1029_REG_TEMP[nr]); + } + for (nr = 0; nr < ARRAY_SIZE(ADM1029_REG_FAN); nr++) { + data->fan[nr] = + i2c_smbus_read_byte_data(client, + ADM1029_REG_FAN[nr]); + } + for (nr = 0; nr < ARRAY_SIZE(ADM1029_REG_FAN_DIV); nr++) { + data->fan_div[nr] = + i2c_smbus_read_byte_data(client, + ADM1029_REG_FAN_DIV[nr]); + } + + data->last_updated = jiffies; + data->valid = 1; + } + + mutex_unlock(&data->update_lock); + + return data; +} + +/* + * Sysfs stuff + */ + +static ssize_t +temp_show(struct device *dev, struct device_attribute *devattr, char *buf) +{ + struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); + struct adm1029_data *data = adm1029_update_device(dev); + + return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[attr->index])); +} + +static ssize_t +fan_show(struct device *dev, struct device_attribute *devattr, char *buf) +{ + struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); + struct adm1029_data *data = adm1029_update_device(dev); + u16 val; + + if (data->fan[attr->index] == 0 || + (data->fan_div[attr->index] & 0xC0) == 0 || + data->fan[attr->index] == 255) { + return sprintf(buf, "0\n"); + } + + val = 1880 * 120 / DIV_FROM_REG(data->fan_div[attr->index]) + / data->fan[attr->index]; + return sprintf(buf, "%d\n", val); +} + +static ssize_t +fan_div_show(struct device *dev, struct device_attribute *devattr, char *buf) +{ + struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); + struct adm1029_data *data = adm1029_update_device(dev); + + if ((data->fan_div[attr->index] & 0xC0) == 0) + return sprintf(buf, "0\n"); + return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[attr->index])); +} + +static ssize_t fan_div_store(struct device *dev, + struct device_attribute *devattr, + const char *buf, size_t count) +{ + struct adm1029_data *data = dev_get_drvdata(dev); + struct i2c_client *client = data->client; + struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); + u8 reg; + long val; + int ret = kstrtol(buf, 10, &val); + + if (ret < 0) + return ret; + + mutex_lock(&data->update_lock); + + /*Read actual config */ + reg = i2c_smbus_read_byte_data(client, + ADM1029_REG_FAN_DIV[attr->index]); + + switch (val) { + case 1: + val = 1; + break; + case 2: + val = 2; + break; + case 4: + val = 3; + break; + default: + mutex_unlock(&data->update_lock); + dev_err(&client->dev, + "fan_div value %ld not supported. Choose one of 1, 2 or 4!\n", + val); + return -EINVAL; + } + /* Update the value */ + reg = (reg & 0x3F) | (val << 6); + + /* Update the cache */ + data->fan_div[attr->index] = reg; + + /* Write value */ + i2c_smbus_write_byte_data(client, + ADM1029_REG_FAN_DIV[attr->index], reg); + mutex_unlock(&data->update_lock); + + return count; +} + +/* Access rights on sysfs. */ +static SENSOR_DEVICE_ATTR_RO(temp1_input, temp, 0); +static SENSOR_DEVICE_ATTR_RO(temp2_input, temp, 1); +static SENSOR_DEVICE_ATTR_RO(temp3_input, temp, 2); + +static SENSOR_DEVICE_ATTR_RO(temp1_max, temp, 3); +static SENSOR_DEVICE_ATTR_RO(temp2_max, temp, 4); +static SENSOR_DEVICE_ATTR_RO(temp3_max, temp, 5); + +static SENSOR_DEVICE_ATTR_RO(temp1_min, temp, 6); +static SENSOR_DEVICE_ATTR_RO(temp2_min, temp, 7); +static SENSOR_DEVICE_ATTR_RO(temp3_min, temp, 8); + +static SENSOR_DEVICE_ATTR_RO(fan1_input, fan, 0); +static SENSOR_DEVICE_ATTR_RO(fan2_input, fan, 1); + +static SENSOR_DEVICE_ATTR_RO(fan1_min, fan, 2); +static SENSOR_DEVICE_ATTR_RO(fan2_min, fan, 3); + +static SENSOR_DEVICE_ATTR_RW(fan1_div, fan_div, 0); +static SENSOR_DEVICE_ATTR_RW(fan2_div, fan_div, 1); + +static struct attribute *adm1029_attrs[] = { + &sensor_dev_attr_temp1_input.dev_attr.attr, + &sensor_dev_attr_temp1_min.dev_attr.attr, + &sensor_dev_attr_temp1_max.dev_attr.attr, + &sensor_dev_attr_temp2_input.dev_attr.attr, + &sensor_dev_attr_temp2_min.dev_attr.attr, + &sensor_dev_attr_temp2_max.dev_attr.attr, + &sensor_dev_attr_temp3_input.dev_attr.attr, + &sensor_dev_attr_temp3_min.dev_attr.attr, + &sensor_dev_attr_temp3_max.dev_attr.attr, + &sensor_dev_attr_fan1_input.dev_attr.attr, + &sensor_dev_attr_fan2_input.dev_attr.attr, + &sensor_dev_attr_fan1_min.dev_attr.attr, + &sensor_dev_attr_fan2_min.dev_attr.attr, + &sensor_dev_attr_fan1_div.dev_attr.attr, + &sensor_dev_attr_fan2_div.dev_attr.attr, + NULL +}; + +ATTRIBUTE_GROUPS(adm1029); + +/* + * Real code + */ + +/* Return 0 if detection is successful, -ENODEV otherwise */ +static int adm1029_detect(struct i2c_client *client, + struct i2c_board_info *info) +{ + struct i2c_adapter *adapter = client->adapter; + u8 man_id, chip_id, temp_devices_installed, nb_fan_support; + + if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) + return -ENODEV; + + /* + * ADM1029 doesn't have CHIP ID, check just MAN ID + * For better detection we check also ADM1029_TEMP_DEVICES_INSTALLED, + * ADM1029_REG_NB_FAN_SUPPORT and compare it with possible values + * documented + */ + + man_id = i2c_smbus_read_byte_data(client, ADM1029_REG_MAN_ID); + chip_id = i2c_smbus_read_byte_data(client, ADM1029_REG_CHIP_ID); + temp_devices_installed = i2c_smbus_read_byte_data(client, + ADM1029_REG_TEMP_DEVICES_INSTALLED); + nb_fan_support = i2c_smbus_read_byte_data(client, + ADM1029_REG_NB_FAN_SUPPORT); + /* 0x41 is Analog Devices */ + if (man_id != 0x41 || (temp_devices_installed & 0xf9) != 0x01 || + nb_fan_support != 0x03) + return -ENODEV; + + if ((chip_id & 0xF0) != 0x00) { + /* + * There are no "official" CHIP ID, so actually + * we use Major/Minor revision for that + */ + pr_info("Unknown major revision %x, please let us know\n", + chip_id); + return -ENODEV; + } + + strlcpy(info->type, "adm1029", I2C_NAME_SIZE); + + return 0; +} + +static int adm1029_init_client(struct i2c_client *client) +{ + u8 config; + + config = i2c_smbus_read_byte_data(client, ADM1029_REG_CONFIG); + if ((config & 0x10) == 0) { + i2c_smbus_write_byte_data(client, ADM1029_REG_CONFIG, + config | 0x10); + } + /* recheck config */ + config = i2c_smbus_read_byte_data(client, ADM1029_REG_CONFIG); + if ((config & 0x10) == 0) { + dev_err(&client->dev, "Initialization failed!\n"); + return 0; + } + return 1; +} + +static int adm1029_probe(struct i2c_client *client) +{ + struct device *dev = &client->dev; + struct adm1029_data *data; + struct device *hwmon_dev; + + data = devm_kzalloc(dev, sizeof(struct adm1029_data), GFP_KERNEL); + if (!data) + return -ENOMEM; + + data->client = client; + mutex_init(&data->update_lock); + + /* + * Initialize the ADM1029 chip + * Check config register + */ + if (adm1029_init_client(client) == 0) + return -ENODEV; + + hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name, + data, + adm1029_groups); + return PTR_ERR_OR_ZERO(hwmon_dev); +} + +static const struct i2c_device_id adm1029_id[] = { + { "adm1029", 0 }, + { } +}; +MODULE_DEVICE_TABLE(i2c, adm1029_id); + +static struct i2c_driver adm1029_driver = { + .class = I2C_CLASS_HWMON, + .driver = { + .name = "adm1029", + }, + .probe_new = adm1029_probe, + .id_table = adm1029_id, + .detect = adm1029_detect, + .address_list = normal_i2c, +}; + +module_i2c_driver(adm1029_driver); + +MODULE_AUTHOR("Corentin LABBE <clabbe.montjoie@gmail.com>"); +MODULE_DESCRIPTION("adm1029 driver"); +MODULE_LICENSE("GPL v2"); |