diff options
Diffstat (limited to 'package/kernel/hwmon-gsc')
| -rw-r--r-- | package/kernel/hwmon-gsc/Makefile | 30 | ||||
| -rw-r--r-- | package/kernel/hwmon-gsc/src/Makefile | 1 | ||||
| -rw-r--r-- | package/kernel/hwmon-gsc/src/gsc.c | 308 |
3 files changed, 339 insertions, 0 deletions
diff --git a/package/kernel/hwmon-gsc/Makefile b/package/kernel/hwmon-gsc/Makefile new file mode 100644 index 0000000000..1892e027ca --- /dev/null +++ b/package/kernel/hwmon-gsc/Makefile @@ -0,0 +1,30 @@ +include $(TOPDIR)/rules.mk +include $(INCLUDE_DIR)/kernel.mk + +PKG_NAME:=hwmon-gsc +PKG_RELEASE:=1 + +include $(INCLUDE_DIR)/package.mk + +define KernelPackage/hwmon-gsc + SUBMENU:=Hardware Monitoring Support + DEPENDS:=@TARGET_imx6||TARGET_cns3xxx kmod-hwmon-core +kmod-i2c-core + TITLE:=Driver for the Gateworks System Controller + AUTOLOAD:=$(call AutoLoad,60,gsc) + FILES:=$(PKG_BUILD_DIR)/gsc.ko +endef + +define KernelPackage/hwmon-gsc/description + Kernel module for the Gateworks System Controller chips. +endef + +define Build/Compile + $(MAKE) -C "$(LINUX_DIR)" \ + CROSS_COMPILE="$(TARGET_CROSS)" \ + ARCH="$(LINUX_KARCH)" \ + SUBDIRS="$(PKG_BUILD_DIR)" \ + EXTRA_CFLAGS="$(BUILDFLAGS)" \ + modules +endef + +$(eval $(call KernelPackage,hwmon-gsc)) diff --git a/package/kernel/hwmon-gsc/src/Makefile b/package/kernel/hwmon-gsc/src/Makefile new file mode 100644 index 0000000000..0e54aed2e3 --- /dev/null +++ b/package/kernel/hwmon-gsc/src/Makefile @@ -0,0 +1 @@ +obj-m := gsc.o diff --git a/package/kernel/hwmon-gsc/src/gsc.c b/package/kernel/hwmon-gsc/src/gsc.c new file mode 100644 index 0000000000..737cc599b4 --- /dev/null +++ b/package/kernel/hwmon-gsc/src/gsc.c @@ -0,0 +1,308 @@ +/* + * 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); + |