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