You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
309 lines
9.3 KiB
C
309 lines
9.3 KiB
C
/*
|
|
* A hwmon driver for the Gateworks System Controller
|
|
* Copyright (C) 2009 Gateworks Corporation
|
|
*
|
|
* Author: Chris Lang <clang@gateworks.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 - version 2.
|
|
*/
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/i2c.h>
|
|
#include <linux/hwmon.h>
|
|
#include <linux/hwmon-sysfs.h>
|
|
#include <linux/err.h>
|
|
#include <linux/slab.h>
|
|
|
|
#define DRV_VERSION "0.2"
|
|
|
|
enum chips { gsp };
|
|
|
|
/* AD7418 registers */
|
|
#define GSP_REG_TEMP_IN 0x00
|
|
#define GSP_REG_VIN 0x02
|
|
#define GSP_REG_3P3 0x05
|
|
#define GSP_REG_BAT 0x08
|
|
#define GSP_REG_5P0 0x0b
|
|
#define GSP_REG_CORE 0x0e
|
|
#define GSP_REG_CPU1 0x11
|
|
#define GSP_REG_CPU2 0x14
|
|
#define GSP_REG_DRAM 0x17
|
|
#define GSP_REG_EXT_BAT 0x1a
|
|
#define GSP_REG_IO1 0x1d
|
|
#define GSP_REG_IO2 0x20
|
|
#define GSP_REG_PCIE 0x23
|
|
#define GSP_REG_CURRENT 0x26
|
|
#define GSP_FAN_0 0x2C
|
|
#define GSP_FAN_1 0x2E
|
|
#define GSP_FAN_2 0x30
|
|
#define GSP_FAN_3 0x32
|
|
#define GSP_FAN_4 0x34
|
|
#define GSP_FAN_5 0x36
|
|
|
|
struct gsp_sensor_info {
|
|
const char* name;
|
|
int reg;
|
|
};
|
|
|
|
static const struct gsp_sensor_info gsp_sensors[] = {
|
|
{"temp", GSP_REG_TEMP_IN},
|
|
{"vin", GSP_REG_VIN},
|
|
{"3p3", GSP_REG_3P3},
|
|
{"bat", GSP_REG_BAT},
|
|
{"5p0", GSP_REG_5P0},
|
|
{"core", GSP_REG_CORE},
|
|
{"cpu1", GSP_REG_CPU1},
|
|
{"cpu2", GSP_REG_CPU2},
|
|
{"dram", GSP_REG_DRAM},
|
|
{"ext_bat", GSP_REG_EXT_BAT},
|
|
{"io1", GSP_REG_IO1},
|
|
{"io2", GSP_REG_IO2},
|
|
{"pci2", GSP_REG_PCIE},
|
|
{"current", GSP_REG_CURRENT},
|
|
{"fan_point0", GSP_FAN_0},
|
|
{"fan_point1", GSP_FAN_1},
|
|
{"fan_point2", GSP_FAN_2},
|
|
{"fan_point3", GSP_FAN_3},
|
|
{"fan_point4", GSP_FAN_4},
|
|
{"fan_point5", GSP_FAN_5},
|
|
};
|
|
|
|
struct gsp_data {
|
|
struct device *hwmon_dev;
|
|
struct attribute_group attrs;
|
|
enum chips type;
|
|
};
|
|
|
|
static int gsp_probe(struct i2c_client *client,
|
|
const struct i2c_device_id *id);
|
|
static int gsp_remove(struct i2c_client *client);
|
|
|
|
static const struct i2c_device_id gsp_id[] = {
|
|
{ "gsp", 0 },
|
|
{ }
|
|
};
|
|
MODULE_DEVICE_TABLE(i2c, gsp_id);
|
|
|
|
static struct i2c_driver gsp_driver = {
|
|
.driver = {
|
|
.name = "gsp",
|
|
},
|
|
.probe = gsp_probe,
|
|
.remove = gsp_remove,
|
|
.id_table = gsp_id,
|
|
};
|
|
|
|
/* All registers are word-sized, except for the configuration registers.
|
|
* AD7418 uses a high-byte first convention. Do NOT use those functions to
|
|
* access the configuration registers CONF and CONF2, as they are byte-sized.
|
|
*/
|
|
static inline int gsp_read(struct i2c_client *client, u8 reg)
|
|
{
|
|
unsigned int adc = 0;
|
|
if (reg == GSP_REG_TEMP_IN || reg > GSP_REG_CURRENT)
|
|
{
|
|
adc |= i2c_smbus_read_byte_data(client, reg);
|
|
adc |= i2c_smbus_read_byte_data(client, reg + 1) << 8;
|
|
return adc;
|
|
}
|
|
else
|
|
{
|
|
adc |= i2c_smbus_read_byte_data(client, reg);
|
|
adc |= i2c_smbus_read_byte_data(client, reg + 1) << 8;
|
|
adc |= i2c_smbus_read_byte_data(client, reg + 2) << 16;
|
|
return adc;
|
|
}
|
|
}
|
|
|
|
static inline int gsp_write(struct i2c_client *client, u8 reg, u16 value)
|
|
{
|
|
i2c_smbus_write_byte_data(client, reg, value & 0xff);
|
|
i2c_smbus_write_byte_data(client, reg + 1, ((value >> 8) & 0xff));
|
|
return 1;
|
|
}
|
|
|
|
static ssize_t show_adc(struct device *dev, struct device_attribute *devattr,
|
|
char *buf)
|
|
{
|
|
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
|
|
struct i2c_client *client = to_i2c_client(dev);
|
|
return sprintf(buf, "%d\n", gsp_read(client, gsp_sensors[attr->index].reg));
|
|
}
|
|
|
|
static ssize_t show_label(struct device *dev,
|
|
struct device_attribute *devattr, char *buf)
|
|
{
|
|
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
|
|
|
|
return sprintf(buf, "%s\n", gsp_sensors[attr->index].name);
|
|
}
|
|
|
|
static ssize_t store_fan(struct device *dev,
|
|
struct device_attribute *devattr, const char *buf, size_t count)
|
|
{
|
|
u16 val;
|
|
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
|
|
struct i2c_client *client = to_i2c_client(dev);
|
|
val = simple_strtoul(buf, NULL, 10);
|
|
gsp_write(client, gsp_sensors[attr->index].reg, val);
|
|
return count;
|
|
}
|
|
|
|
static SENSOR_DEVICE_ATTR(temp0_input, S_IRUGO, show_adc, NULL, 0);
|
|
static SENSOR_DEVICE_ATTR(temp0_label, S_IRUGO, show_label, NULL, 0);
|
|
|
|
static SENSOR_DEVICE_ATTR(in0_input, S_IRUGO, show_adc, NULL, 1);
|
|
static SENSOR_DEVICE_ATTR(in0_label, S_IRUGO, show_label, NULL, 1);
|
|
static SENSOR_DEVICE_ATTR(in1_input, S_IRUGO, show_adc, NULL, 2);
|
|
static SENSOR_DEVICE_ATTR(in1_label, S_IRUGO, show_label, NULL, 2);
|
|
static SENSOR_DEVICE_ATTR(in2_input, S_IRUGO, show_adc, NULL, 3);
|
|
static SENSOR_DEVICE_ATTR(in2_label, S_IRUGO, show_label, NULL, 3);
|
|
static SENSOR_DEVICE_ATTR(in3_input, S_IRUGO, show_adc, NULL, 4);
|
|
static SENSOR_DEVICE_ATTR(in3_label, S_IRUGO, show_label, NULL, 4);
|
|
static SENSOR_DEVICE_ATTR(in4_input, S_IRUGO, show_adc, NULL, 5);
|
|
static SENSOR_DEVICE_ATTR(in4_label, S_IRUGO, show_label, NULL, 5);
|
|
static SENSOR_DEVICE_ATTR(in5_input, S_IRUGO, show_adc, NULL, 6);
|
|
static SENSOR_DEVICE_ATTR(in5_label, S_IRUGO, show_label, NULL, 6);
|
|
static SENSOR_DEVICE_ATTR(in6_input, S_IRUGO, show_adc, NULL, 7);
|
|
static SENSOR_DEVICE_ATTR(in6_label, S_IRUGO, show_label, NULL, 7);
|
|
static SENSOR_DEVICE_ATTR(in7_input, S_IRUGO, show_adc, NULL, 8);
|
|
static SENSOR_DEVICE_ATTR(in7_label, S_IRUGO, show_label, NULL, 8);
|
|
static SENSOR_DEVICE_ATTR(in8_input, S_IRUGO, show_adc, NULL, 9);
|
|
static SENSOR_DEVICE_ATTR(in8_label, S_IRUGO, show_label, NULL, 9);
|
|
static SENSOR_DEVICE_ATTR(in9_input, S_IRUGO, show_adc, NULL, 10);
|
|
static SENSOR_DEVICE_ATTR(in9_label, S_IRUGO, show_label, NULL, 10);
|
|
static SENSOR_DEVICE_ATTR(in10_input, S_IRUGO, show_adc, NULL, 11);
|
|
static SENSOR_DEVICE_ATTR(in10_label, S_IRUGO, show_label, NULL, 11);
|
|
static SENSOR_DEVICE_ATTR(in11_input, S_IRUGO, show_adc, NULL, 12);
|
|
static SENSOR_DEVICE_ATTR(in11_label, S_IRUGO, show_label, NULL, 12);
|
|
static SENSOR_DEVICE_ATTR(in12_input, S_IRUGO, show_adc, NULL, 13);
|
|
static SENSOR_DEVICE_ATTR(in12_label, S_IRUGO, show_label, NULL, 13);
|
|
|
|
static SENSOR_DEVICE_ATTR(fan0_point0, S_IRUGO | S_IWUSR, show_adc, store_fan, 14);
|
|
static SENSOR_DEVICE_ATTR(fan0_point1, S_IRUGO | S_IWUSR, show_adc, store_fan, 15);
|
|
static SENSOR_DEVICE_ATTR(fan0_point2, S_IRUGO | S_IWUSR, show_adc, store_fan, 16);
|
|
static SENSOR_DEVICE_ATTR(fan0_point3, S_IRUGO | S_IWUSR, show_adc, store_fan, 17);
|
|
static SENSOR_DEVICE_ATTR(fan0_point4, S_IRUGO | S_IWUSR, show_adc, store_fan, 18);
|
|
static SENSOR_DEVICE_ATTR(fan0_point5, S_IRUGO | S_IWUSR, show_adc, store_fan, 19);
|
|
|
|
static struct attribute *gsp_attributes[] = {
|
|
&sensor_dev_attr_temp0_input.dev_attr.attr,
|
|
&sensor_dev_attr_in0_input.dev_attr.attr,
|
|
&sensor_dev_attr_in1_input.dev_attr.attr,
|
|
&sensor_dev_attr_in2_input.dev_attr.attr,
|
|
&sensor_dev_attr_in3_input.dev_attr.attr,
|
|
&sensor_dev_attr_in4_input.dev_attr.attr,
|
|
&sensor_dev_attr_in5_input.dev_attr.attr,
|
|
&sensor_dev_attr_in6_input.dev_attr.attr,
|
|
&sensor_dev_attr_in7_input.dev_attr.attr,
|
|
&sensor_dev_attr_in8_input.dev_attr.attr,
|
|
&sensor_dev_attr_in9_input.dev_attr.attr,
|
|
&sensor_dev_attr_in10_input.dev_attr.attr,
|
|
&sensor_dev_attr_in11_input.dev_attr.attr,
|
|
&sensor_dev_attr_in12_input.dev_attr.attr,
|
|
|
|
&sensor_dev_attr_temp0_label.dev_attr.attr,
|
|
&sensor_dev_attr_in0_label.dev_attr.attr,
|
|
&sensor_dev_attr_in1_label.dev_attr.attr,
|
|
&sensor_dev_attr_in2_label.dev_attr.attr,
|
|
&sensor_dev_attr_in3_label.dev_attr.attr,
|
|
&sensor_dev_attr_in4_label.dev_attr.attr,
|
|
&sensor_dev_attr_in5_label.dev_attr.attr,
|
|
&sensor_dev_attr_in6_label.dev_attr.attr,
|
|
&sensor_dev_attr_in7_label.dev_attr.attr,
|
|
&sensor_dev_attr_in8_label.dev_attr.attr,
|
|
&sensor_dev_attr_in9_label.dev_attr.attr,
|
|
&sensor_dev_attr_in10_label.dev_attr.attr,
|
|
&sensor_dev_attr_in11_label.dev_attr.attr,
|
|
&sensor_dev_attr_in12_label.dev_attr.attr,
|
|
|
|
&sensor_dev_attr_fan0_point0.dev_attr.attr,
|
|
&sensor_dev_attr_fan0_point1.dev_attr.attr,
|
|
&sensor_dev_attr_fan0_point2.dev_attr.attr,
|
|
&sensor_dev_attr_fan0_point3.dev_attr.attr,
|
|
&sensor_dev_attr_fan0_point4.dev_attr.attr,
|
|
&sensor_dev_attr_fan0_point5.dev_attr.attr,
|
|
NULL
|
|
};
|
|
|
|
|
|
static int gsp_probe(struct i2c_client *client,
|
|
const struct i2c_device_id *id)
|
|
{
|
|
struct i2c_adapter *adapter = client->adapter;
|
|
struct gsp_data *data;
|
|
int err;
|
|
|
|
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA |
|
|
I2C_FUNC_SMBUS_WORD_DATA)) {
|
|
err = -EOPNOTSUPP;
|
|
goto exit;
|
|
}
|
|
|
|
if (!(data = kzalloc(sizeof(struct gsp_data), GFP_KERNEL))) {
|
|
err = -ENOMEM;
|
|
goto exit;
|
|
}
|
|
|
|
i2c_set_clientdata(client, data);
|
|
|
|
data->type = id->driver_data;
|
|
|
|
switch (data->type) {
|
|
case 0:
|
|
data->attrs.attrs = gsp_attributes;
|
|
break;
|
|
}
|
|
|
|
dev_info(&client->dev, "%s chip found\n", client->name);
|
|
|
|
/* Register sysfs hooks */
|
|
if ((err = sysfs_create_group(&client->dev.kobj, &data->attrs)))
|
|
goto exit_free;
|
|
|
|
data->hwmon_dev = hwmon_device_register(&client->dev);
|
|
if (IS_ERR(data->hwmon_dev)) {
|
|
err = PTR_ERR(data->hwmon_dev);
|
|
goto exit_remove;
|
|
}
|
|
|
|
return 0;
|
|
|
|
exit_remove:
|
|
sysfs_remove_group(&client->dev.kobj, &data->attrs);
|
|
exit_free:
|
|
kfree(data);
|
|
exit:
|
|
return err;
|
|
}
|
|
|
|
static int gsp_remove(struct i2c_client *client)
|
|
{
|
|
struct gsp_data *data = i2c_get_clientdata(client);
|
|
hwmon_device_unregister(data->hwmon_dev);
|
|
sysfs_remove_group(&client->dev.kobj, &data->attrs);
|
|
kfree(data);
|
|
return 0;
|
|
}
|
|
|
|
static int __init gsp_init(void)
|
|
{
|
|
return i2c_add_driver(&gsp_driver);
|
|
}
|
|
|
|
static void __exit gsp_exit(void)
|
|
{
|
|
i2c_del_driver(&gsp_driver);
|
|
}
|
|
|
|
module_init(gsp_init);
|
|
module_exit(gsp_exit);
|
|
|
|
MODULE_AUTHOR("Chris Lang <clang@gateworks.com>");
|
|
MODULE_DESCRIPTION("GSC HWMON driver");
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_VERSION(DRV_VERSION);
|
|
|