forked from Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
432 lines
12 KiB
432 lines
12 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
|
/* |
|
* thmc50.c - Part of lm_sensors, Linux kernel modules for hardware |
|
* monitoring |
|
* Copyright (C) 2007 Krzysztof Helt <[email protected]> |
|
* Based on 2.4 driver by Frodo Looijaard <[email protected]> and |
|
* Philip Edelbrock <[email protected]> |
|
*/ |
|
|
|
#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> |
|
#include <linux/jiffies.h> |
|
|
|
MODULE_LICENSE("GPL"); |
|
|
|
/* Addresses to scan */ |
|
static const unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, I2C_CLIENT_END }; |
|
|
|
/* Insmod parameters */ |
|
enum chips { 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 i2c_client *client; |
|
const struct attribute_group *groups[3]; |
|
|
|
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 struct thmc50_data *thmc50_update_device(struct device *dev) |
|
{ |
|
struct thmc50_data *data = dev_get_drvdata(dev); |
|
struct i2c_client *client = data->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 ssize_t analog_out_show(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 analog_out_store(struct device *dev, |
|
struct device_attribute *attr, |
|
const char *buf, size_t count) |
|
{ |
|
struct thmc50_data *data = dev_get_drvdata(dev); |
|
struct i2c_client *client = data->client; |
|
int config; |
|
unsigned long tmp; |
|
int err; |
|
|
|
err = kstrtoul(buf, 10, &tmp); |
|
if (err) |
|
return err; |
|
|
|
mutex_lock(&data->update_lock); |
|
data->analog_out = clamp_val(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 pwm_mode_show(struct device *dev, |
|
struct device_attribute *attr, char *buf) |
|
{ |
|
return sprintf(buf, "0\n"); |
|
} |
|
|
|
/* Temperatures */ |
|
static ssize_t temp_show(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 temp_min_show(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 temp_min_store(struct device *dev, |
|
struct device_attribute *attr, const char *buf, |
|
size_t count) |
|
{ |
|
int nr = to_sensor_dev_attr(attr)->index; |
|
struct thmc50_data *data = dev_get_drvdata(dev); |
|
struct i2c_client *client = data->client; |
|
long val; |
|
int err; |
|
|
|
err = kstrtol(buf, 10, &val); |
|
if (err) |
|
return err; |
|
|
|
mutex_lock(&data->update_lock); |
|
data->temp_min[nr] = clamp_val(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 temp_max_show(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 temp_max_store(struct device *dev, |
|
struct device_attribute *attr, const char *buf, |
|
size_t count) |
|
{ |
|
int nr = to_sensor_dev_attr(attr)->index; |
|
struct thmc50_data *data = dev_get_drvdata(dev); |
|
struct i2c_client *client = data->client; |
|
long val; |
|
int err; |
|
|
|
err = kstrtol(buf, 10, &val); |
|
if (err) |
|
return err; |
|
|
|
mutex_lock(&data->update_lock); |
|
data->temp_max[nr] = clamp_val(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 temp_critical_show(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 alarm_show(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); |
|
} |
|
|
|
static SENSOR_DEVICE_ATTR_RO(temp1_input, temp, 0); |
|
static SENSOR_DEVICE_ATTR_RW(temp1_min, temp_min, 0); |
|
static SENSOR_DEVICE_ATTR_RW(temp1_max, temp_max, 0); |
|
static SENSOR_DEVICE_ATTR_RO(temp1_crit, temp_critical, 0); |
|
static SENSOR_DEVICE_ATTR_RO(temp2_input, temp, 1); |
|
static SENSOR_DEVICE_ATTR_RW(temp2_min, temp_min, 1); |
|
static SENSOR_DEVICE_ATTR_RW(temp2_max, temp_max, 1); |
|
static SENSOR_DEVICE_ATTR_RO(temp2_crit, temp_critical, 1); |
|
static SENSOR_DEVICE_ATTR_RO(temp3_input, temp, 2); |
|
static SENSOR_DEVICE_ATTR_RW(temp3_min, temp_min, 2); |
|
static SENSOR_DEVICE_ATTR_RW(temp3_max, temp_max, 2); |
|
static SENSOR_DEVICE_ATTR_RO(temp3_crit, temp_critical, 2); |
|
|
|
static SENSOR_DEVICE_ATTR_RO(temp1_alarm, alarm, 0); |
|
static SENSOR_DEVICE_ATTR_RO(temp2_alarm, alarm, 5); |
|
static SENSOR_DEVICE_ATTR_RO(temp3_alarm, alarm, 1); |
|
static SENSOR_DEVICE_ATTR_RO(temp2_fault, alarm, 7); |
|
static SENSOR_DEVICE_ATTR_RO(temp3_fault, alarm, 2); |
|
|
|
static SENSOR_DEVICE_ATTR_RW(pwm1, analog_out, 0); |
|
static SENSOR_DEVICE_ATTR_RO(pwm1_mode, pwm_mode, 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 void thmc50_init_client(struct thmc50_data *data) |
|
{ |
|
struct i2c_client *client = data->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 const struct i2c_device_id thmc50_id[]; |
|
|
|
static int thmc50_probe(struct i2c_client *client) |
|
{ |
|
struct device *dev = &client->dev; |
|
struct thmc50_data *data; |
|
struct device *hwmon_dev; |
|
int idx = 0; |
|
|
|
data = devm_kzalloc(dev, sizeof(struct thmc50_data), GFP_KERNEL); |
|
if (!data) |
|
return -ENOMEM; |
|
|
|
data->client = client; |
|
data->type = i2c_match_id(thmc50_id, client)->driver_data; |
|
mutex_init(&data->update_lock); |
|
|
|
thmc50_init_client(data); |
|
|
|
/* sysfs hooks */ |
|
data->groups[idx++] = &thmc50_group; |
|
|
|
/* Register additional ADM1022 sysfs hooks */ |
|
if (data->has_temp3) |
|
data->groups[idx++] = &temp3_group; |
|
|
|
hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name, |
|
data, data->groups); |
|
return PTR_ERR_OR_ZERO(hwmon_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_new = thmc50_probe, |
|
.id_table = thmc50_id, |
|
.detect = thmc50_detect, |
|
.address_list = normal_i2c, |
|
}; |
|
|
|
module_i2c_driver(thmc50_driver); |
|
|
|
MODULE_AUTHOR("Krzysztof Helt <[email protected]>"); |
|
MODULE_DESCRIPTION("THMC50 driver");
|
|
|