+++ /dev/null
-/*
- * 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);
-
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