--- /dev/null
+/*
+ vt8231.c - Part of lm_sensors, Linux kernel modules
+ for hardware monitoring
+
+ Copyright (c) 2005 Roger Lucas <roger@planbit.co.uk>
+ Copyright (c) 2002 Mark D. Studebaker <mdsxyz123@yahoo.com>
+ Aaron M. Marsh <amarsh@sdf.lonestar.org>
+
+ 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; either version 2 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+*/
+
+/* Supports VIA VT8231 South Bridge embedded sensors
+*/
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/pci.h>
+#include <linux/jiffies.h>
+#include <linux/i2c.h>
+#include <linux/i2c-isa.h>
+#include <linux/hwmon.h>
+#include <linux/hwmon-sysfs.h>
+#include <linux/hwmon-vid.h>
+#include <linux/err.h>
+#include <asm/io.h>
+
+static int force_addr;
+module_param(force_addr, int, 0);
+MODULE_PARM_DESC(force_addr, "Initialize the base address of the sensors");
+
+/* Device address
+ Note that we can't determine the ISA address until we have initialized
+ our module */
+static unsigned short isa_address;
+
+#define VT8231_EXTENT 0x80
+#define VT8231_BASE_REG 0x70
+#define VT8231_ENABLE_REG 0x74
+
+/* The VT8231 registers
+
+ The reset value for the input channel configuration is used (Reg 0x4A=0x07)
+ which sets the selected inputs marked with '*' below if multiple options are
+ possible:
+
+ Voltage Mode Temperature Mode
+ Sensor Linux Id Linux Id VIA Id
+ -------- -------- -------- ------
+ CPU Diode N/A temp1 0
+ UIC1 in0 temp2 * 1
+ UIC2 in1 * temp3 2
+ UIC3 in2 * temp4 3
+ UIC4 in3 * temp5 4
+ UIC5 in4 * temp6 5
+ 3.3V in5 N/A
+
+ Note that the BIOS may set the configuration register to a different value
+ to match the motherboard configuration.
+*/
+
+/* fans numbered 0-1 */
+#define VT8231_REG_FAN_MIN(nr) (0x3b + (nr))
+#define VT8231_REG_FAN(nr) (0x29 + (nr))
+
+/* Voltage inputs numbered 0-5 */
+
+static const u8 regvolt[] = { 0x21, 0x22, 0x23, 0x24, 0x25, 0x26 };
+static const u8 regvoltmax[] = { 0x3d, 0x2b, 0x2d, 0x2f, 0x31, 0x33 };
+static const u8 regvoltmin[] = { 0x3e, 0x2c, 0x2e, 0x30, 0x32, 0x34 };
+
+/* Temperatures are numbered 1-6 according to the Linux kernel specification.
+**
+** In the VIA datasheet, however, the temperatures are numbered from zero.
+** Since it is important that this driver can easily be compared to the VIA
+** datasheet, we will use the VIA numbering within this driver and map the
+** kernel sysfs device name to the VIA number in the sysfs callback.
+*/
+
+#define VT8231_REG_TEMP_LOW01 0x49
+#define VT8231_REG_TEMP_LOW25 0x4d
+
+static const u8 regtemp[] = { 0x1f, 0x21, 0x22, 0x23, 0x24, 0x25 };
+static const u8 regtempmax[] = { 0x39, 0x3d, 0x2b, 0x2d, 0x2f, 0x31 };
+static const u8 regtempmin[] = { 0x3a, 0x3e, 0x2c, 0x2e, 0x30, 0x32 };
+
+#define TEMP_FROM_REG(reg) (((253 * 4 - (reg)) * 550 + 105) / 210)
+#define TEMP_MAXMIN_FROM_REG(reg) (((253 - (reg)) * 2200 + 105) / 210)
+#define TEMP_MAXMIN_TO_REG(val) (253 - ((val) * 210 + 1100) / 2200)
+
+#define VT8231_REG_CONFIG 0x40
+#define VT8231_REG_ALARM1 0x41
+#define VT8231_REG_ALARM2 0x42
+#define VT8231_REG_FANDIV 0x47
+#define VT8231_REG_UCH_CONFIG 0x4a
+#define VT8231_REG_TEMP1_CONFIG 0x4b
+#define VT8231_REG_TEMP2_CONFIG 0x4c
+
+/* temps 0-5 as numbered in VIA datasheet - see later for mapping to Linux
+** numbering
+*/
+#define ISTEMP(i, ch_config) ((i) == 0 ? 1 : \
+ ((ch_config) >> ((i)+1)) & 0x01)
+/* voltages 0-5 */
+#define ISVOLT(i, ch_config) ((i) == 5 ? 1 : \
+ !(((ch_config) >> ((i)+2)) & 0x01))
+
+#define DIV_FROM_REG(val) (1 << (val))
+
+/* NB The values returned here are NOT temperatures. The calibration curves
+** for the thermistor curves are board-specific and must go in the
+** sensors.conf file. Temperature sensors are actually ten bits, but the
+** VIA datasheet only considers the 8 MSBs obtained from the regtemp[]
+** register. The temperature value returned should have a magnitude of 3,
+** so we use the VIA scaling as the "true" scaling and use the remaining 2
+** LSBs as fractional precision.
+**
+** All the on-chip hardware temperature comparisons for the alarms are only
+** 8-bits wide, and compare against the 8 MSBs of the temperature. The bits
+** in the registers VT8231_REG_TEMP_LOW01 and VT8231_REG_TEMP_LOW25 are
+** ignored.
+*/
+
+/******** FAN RPM CONVERSIONS ********
+** This chip saturates back at 0, not at 255 like many the other chips.
+** So, 0 means 0 RPM
+*/
+static inline u8 FAN_TO_REG(long rpm, int div)
+{
+ if (rpm == 0)
+ return 0;
+ return SENSORS_LIMIT(1310720 / (rpm * div), 1, 255);
+}
+
+#define FAN_FROM_REG(val, div) ((val) == 0 ? 0 : 1310720 / ((val) * (div)))
+
+struct vt8231_data {
+ struct i2c_client client;
+ struct semaphore update_lock;
+ struct class_device *class_dev;
+ char valid; /* !=0 if following fields are valid */
+ unsigned long last_updated; /* In jiffies */
+
+ u8 in[6]; /* Register value */
+ u8 in_max[6]; /* Register value */
+ u8 in_min[6]; /* Register value */
+ u16 temp[6]; /* Register value 10 bit, right aligned */
+ u8 temp_max[6]; /* Register value */
+ u8 temp_min[6]; /* Register value */
+ u8 fan[2]; /* Register value */
+ u8 fan_min[2]; /* Register value */
+ u8 fan_div[2]; /* Register encoding, shifted right */
+ u16 alarms; /* Register encoding */
+ u8 uch_config;
+};
+
+static struct pci_dev *s_bridge;
+static int vt8231_detect(struct i2c_adapter *adapter);
+static int vt8231_detach_client(struct i2c_client *client);
+static struct vt8231_data *vt8231_update_device(struct device *dev);
+static void vt8231_init_client(struct i2c_client *client);
+
+static inline int vt8231_read_value(struct i2c_client *client, u8 reg)
+{
+ return inb_p(client->addr + reg);
+}
+
+static inline void vt8231_write_value(struct i2c_client *client, u8 reg,
+ u8 value)
+{
+ outb_p(value, client->addr + reg);
+}
+
+/* following are the sysfs callback functions */
+static ssize_t show_in(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
+ int nr = sensor_attr->index;
+ struct vt8231_data *data = vt8231_update_device(dev);
+
+ return sprintf(buf, "%d\n", ((data->in[nr] - 3) * 10000) / 958);
+}
+
+static ssize_t show_in_min(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
+ int nr = sensor_attr->index;
+ struct vt8231_data *data = vt8231_update_device(dev);
+
+ return sprintf(buf, "%d\n", ((data->in_min[nr] - 3) * 10000) / 958);
+}
+
+static ssize_t show_in_max(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
+ int nr = sensor_attr->index;
+ struct vt8231_data *data = vt8231_update_device(dev);
+
+ return sprintf(buf, "%d\n", (((data->in_max[nr] - 3) * 10000) / 958));
+}
+
+static ssize_t set_in_min(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
+ int nr = sensor_attr->index;
+ struct i2c_client *client = to_i2c_client(dev);
+ struct vt8231_data *data = i2c_get_clientdata(client);
+ unsigned long val = simple_strtoul(buf, NULL, 10);
+
+ down(&data->update_lock);
+ data->in_min[nr] = SENSORS_LIMIT(((val * 958) / 10000) + 3, 0, 255);
+ vt8231_write_value(client, regvoltmin[nr], data->in_min[nr]);
+ up(&data->update_lock);
+ return count;
+}
+
+static ssize_t set_in_max(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
+ int nr = sensor_attr->index;
+ struct i2c_client *client = to_i2c_client(dev);
+ struct vt8231_data *data = i2c_get_clientdata(client);
+ unsigned long val = simple_strtoul(buf, NULL, 10);
+
+ down(&data->update_lock);
+ data->in_max[nr] = SENSORS_LIMIT(((val * 958) / 10000) + 3, 0, 255);
+ vt8231_write_value(client, regvoltmax[nr], data->in_max[nr]);
+ up(&data->update_lock);
+ return count;
+}
+
+/* Special case for input 5 as this has 3.3V scaling built into the chip */
+static ssize_t show_in5(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct vt8231_data *data = vt8231_update_device(dev);
+
+ return sprintf(buf, "%d\n",
+ (((data->in[5] - 3) * 10000 * 54) / (958 * 34)));
+}
+
+static ssize_t show_in5_min(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct vt8231_data *data = vt8231_update_device(dev);
+
+ return sprintf(buf, "%d\n",
+ (((data->in_min[5] - 3) * 10000 * 54) / (958 * 34)));
+}
+
+static ssize_t show_in5_max(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct vt8231_data *data = vt8231_update_device(dev);
+
+ return sprintf(buf, "%d\n",
+ (((data->in_max[5] - 3) * 10000 * 54) / (958 * 34)));
+}
+
+static ssize_t set_in5_min(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ struct vt8231_data *data = i2c_get_clientdata(client);
+ unsigned long val = simple_strtoul(buf, NULL, 10);
+
+ down(&data->update_lock);
+ data->in_min[5] = SENSORS_LIMIT(((val * 958 * 34) / (10000 * 54)) + 3,
+ 0, 255);
+ vt8231_write_value(client, regvoltmin[5], data->in_min[5]);
+ up(&data->update_lock);
+ return count;
+}
+
+static ssize_t set_in5_max(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ struct vt8231_data *data = i2c_get_clientdata(client);
+ unsigned long val = simple_strtoul(buf, NULL, 10);
+
+ down(&data->update_lock);
+ data->in_max[5] = SENSORS_LIMIT(((val * 958 * 34) / (10000 * 54)) + 3,
+ 0, 255);
+ vt8231_write_value(client, regvoltmax[5], data->in_max[5]);
+ up(&data->update_lock);
+ return count;
+}
+
+#define define_voltage_sysfs(offset) \
+static SENSOR_DEVICE_ATTR(in##offset##_input, S_IRUGO, \
+ show_in, NULL, offset); \
+static SENSOR_DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \
+ show_in_min, set_in_min, offset); \
+static SENSOR_DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \
+ show_in_max, set_in_max, offset)
+
+define_voltage_sysfs(0);
+define_voltage_sysfs(1);
+define_voltage_sysfs(2);
+define_voltage_sysfs(3);
+define_voltage_sysfs(4);
+
+static DEVICE_ATTR(in5_input, S_IRUGO, show_in5, NULL);
+static DEVICE_ATTR(in5_min, S_IRUGO | S_IWUSR, show_in5_min, set_in5_min);
+static DEVICE_ATTR(in5_max, S_IRUGO | S_IWUSR, show_in5_max, set_in5_max);
+
+/* Temperatures */
+static ssize_t show_temp0(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct vt8231_data *data = vt8231_update_device(dev);
+ return sprintf(buf, "%d\n", data->temp[0] * 250);
+}
+
+static ssize_t show_temp0_max(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct vt8231_data *data = vt8231_update_device(dev);
+ return sprintf(buf, "%d\n", data->temp_max[0] * 1000);
+}
+
+static ssize_t show_temp0_min(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct vt8231_data *data = vt8231_update_device(dev);
+ return sprintf(buf, "%d\n", data->temp_min[0] * 1000);
+}
+
+static ssize_t set_temp0_max(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ struct vt8231_data *data = i2c_get_clientdata(client);
+ int val = simple_strtol(buf, NULL, 10);
+
+ down(&data->update_lock);
+ data->temp_max[0] = SENSORS_LIMIT((val + 500) / 1000, 0, 255);
+ vt8231_write_value(client, regtempmax[0], data->temp_max[0]);
+ up(&data->update_lock);
+ return count;
+}
+static ssize_t set_temp0_min(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ struct vt8231_data *data = i2c_get_clientdata(client);
+ int val = simple_strtol(buf, NULL, 10);
+
+ down(&data->update_lock);
+ data->temp_min[0] = SENSORS_LIMIT((val + 500) / 1000, 0, 255);
+ vt8231_write_value(client, regtempmin[0], data->temp_min[0]);
+ up(&data->update_lock);
+ return count;
+}
+
+static ssize_t show_temp(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
+ int nr = sensor_attr->index;
+ struct vt8231_data *data = vt8231_update_device(dev);
+ return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[nr]));
+}
+
+static ssize_t show_temp_max(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
+ int nr = sensor_attr->index;
+ struct vt8231_data *data = vt8231_update_device(dev);
+ return sprintf(buf, "%d\n", TEMP_MAXMIN_FROM_REG(data->temp_max[nr]));
+}
+
+static ssize_t show_temp_min(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
+ int nr = sensor_attr->index;
+ struct vt8231_data *data = vt8231_update_device(dev);
+ return sprintf(buf, "%d\n", TEMP_MAXMIN_FROM_REG(data->temp_min[nr]));
+}
+
+static ssize_t set_temp_max(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
+ int nr = sensor_attr->index;
+ struct i2c_client *client = to_i2c_client(dev);
+ struct vt8231_data *data = i2c_get_clientdata(client);
+ int val = simple_strtol(buf, NULL, 10);
+
+ down(&data->update_lock);
+ data->temp_max[nr] = SENSORS_LIMIT(TEMP_MAXMIN_TO_REG(val), 0, 255);
+ vt8231_write_value(client, regtempmax[nr], data->temp_max[nr]);
+ up(&data->update_lock);
+ return count;
+}
+static ssize_t set_temp_min(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
+ int nr = sensor_attr->index;
+ struct i2c_client *client = to_i2c_client(dev);
+ struct vt8231_data *data = i2c_get_clientdata(client);
+ int val = simple_strtol(buf, NULL, 10);
+
+ down(&data->update_lock);
+ data->temp_min[nr] = SENSORS_LIMIT(TEMP_MAXMIN_TO_REG(val), 0, 255);
+ vt8231_write_value(client, regtempmin[nr], data->temp_min[nr]);
+ up(&data->update_lock);
+ return count;
+}
+
+/* Note that these map the Linux temperature sensor numbering (1-6) to the VIA
+** temperature sensor numbering (0-5)
+*/
+#define define_temperature_sysfs(offset) \
+static SENSOR_DEVICE_ATTR(temp##offset##_input, S_IRUGO, \
+ show_temp, NULL, offset - 1); \
+static SENSOR_DEVICE_ATTR(temp##offset##_max, S_IRUGO | S_IWUSR, \
+ show_temp_max, set_temp_max, offset - 1); \
+static SENSOR_DEVICE_ATTR(temp##offset##_min, S_IRUGO | S_IWUSR, \
+ show_temp_min, set_temp_min, offset - 1)
+
+static DEVICE_ATTR(temp1_input, S_IRUGO, show_temp0, NULL);
+static DEVICE_ATTR(temp1_max, S_IRUGO | S_IWUSR, show_temp0_max, set_temp0_max);
+static DEVICE_ATTR(temp1_min, S_IRUGO | S_IWUSR, show_temp0_min, set_temp0_min);
+
+define_temperature_sysfs(2);
+define_temperature_sysfs(3);
+define_temperature_sysfs(4);
+define_temperature_sysfs(5);
+define_temperature_sysfs(6);
+
+#define CFG_INFO_TEMP(id) { &sensor_dev_attr_temp##id##_input.dev_attr, \
+ &sensor_dev_attr_temp##id##_min.dev_attr, \
+ &sensor_dev_attr_temp##id##_max.dev_attr }
+#define CFG_INFO_VOLT(id) { &sensor_dev_attr_in##id##_input.dev_attr, \
+ &sensor_dev_attr_in##id##_min.dev_attr, \
+ &sensor_dev_attr_in##id##_max.dev_attr }
+
+struct str_device_attr_table {
+ struct device_attribute *input;
+ struct device_attribute *min;
+ struct device_attribute *max;
+};
+
+static struct str_device_attr_table cfg_info_temp[] = {
+ { &dev_attr_temp1_input, &dev_attr_temp1_min, &dev_attr_temp1_max },
+ CFG_INFO_TEMP(2),
+ CFG_INFO_TEMP(3),
+ CFG_INFO_TEMP(4),
+ CFG_INFO_TEMP(5),
+ CFG_INFO_TEMP(6)
+};
+
+static struct str_device_attr_table cfg_info_volt[] = {
+ CFG_INFO_VOLT(0),
+ CFG_INFO_VOLT(1),
+ CFG_INFO_VOLT(2),
+ CFG_INFO_VOLT(3),
+ CFG_INFO_VOLT(4),
+ { &dev_attr_in5_input, &dev_attr_in5_min, &dev_attr_in5_max }
+};
+
+/* Fans */
+static ssize_t show_fan(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
+ int nr = sensor_attr->index;
+ struct vt8231_data *data = vt8231_update_device(dev);
+ return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[nr],
+ DIV_FROM_REG(data->fan_div[nr])));
+}
+
+static ssize_t show_fan_min(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
+ int nr = sensor_attr->index;
+ struct vt8231_data *data = vt8231_update_device(dev);
+ return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[nr],
+ DIV_FROM_REG(data->fan_div[nr])));
+}
+
+static ssize_t show_fan_div(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
+ int nr = sensor_attr->index;
+ struct vt8231_data *data = vt8231_update_device(dev);
+ return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr]));
+}
+
+static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
+ int nr = sensor_attr->index;
+ struct i2c_client *client = to_i2c_client(dev);
+ struct vt8231_data *data = i2c_get_clientdata(client);
+ int val = simple_strtoul(buf, NULL, 10);
+
+ down(&data->update_lock);
+ data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr]));
+ vt8231_write_value(client, VT8231_REG_FAN_MIN(nr), data->fan_min[nr]);
+ up(&data->update_lock);
+ return count;
+}
+
+static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ struct vt8231_data *data = i2c_get_clientdata(client);
+ struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
+ unsigned long val = simple_strtoul(buf, NULL, 10);
+ int nr = sensor_attr->index;
+ int old = vt8231_read_value(client, VT8231_REG_FANDIV);
+ long min = FAN_FROM_REG(data->fan_min[nr],
+ DIV_FROM_REG(data->fan_div[nr]));
+
+ down(&data->update_lock);
+ switch (val) {
+ case 1: data->fan_div[nr] = 0; break;
+ case 2: data->fan_div[nr] = 1; break;
+ case 4: data->fan_div[nr] = 2; break;
+ case 8: data->fan_div[nr] = 3; break;
+ default:
+ dev_err(&client->dev, "fan_div value %ld not supported."
+ "Choose one of 1, 2, 4 or 8!\n", val);
+ up(&data->update_lock);
+ return -EINVAL;
+ }
+
+ /* Correct the fan minimum speed */
+ data->fan_min[nr] = FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr]));
+ vt8231_write_value(client, VT8231_REG_FAN_MIN(nr), data->fan_min[nr]);
+
+ old = (old & 0x0f) | (data->fan_div[1] << 6) | (data->fan_div[0] << 4);
+ vt8231_write_value(client, VT8231_REG_FANDIV, old);
+ up(&data->update_lock);
+ return count;
+}
+
+
+#define define_fan_sysfs(offset) \
+static SENSOR_DEVICE_ATTR(fan##offset##_input, S_IRUGO, \
+ show_fan, NULL, offset - 1); \
+static SENSOR_DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR, \
+ show_fan_div, set_fan_div, offset - 1); \
+static SENSOR_DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \
+ show_fan_min, set_fan_min, offset - 1)
+
+define_fan_sysfs(1);
+define_fan_sysfs(2);
+
+/* Alarms */
+static ssize_t show_alarms(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct vt8231_data *data = vt8231_update_device(dev);
+ return sprintf(buf, "%d\n", data->alarms);
+}
+
+static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
+
+static struct i2c_driver vt8231_driver = {
+ .owner = THIS_MODULE,
+ .name = "vt8231",
+ .attach_adapter = vt8231_detect,
+ .detach_client = vt8231_detach_client,
+};
+
+static struct pci_device_id vt8231_pci_ids[] = {
+ { PCI_DEVICE(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8231_4) },
+ { 0, }
+};
+
+MODULE_DEVICE_TABLE(pci, vt8231_pci_ids);
+
+static int __devinit vt8231_pci_probe(struct pci_dev *dev,
+ const struct pci_device_id *id);
+
+static struct pci_driver vt8231_pci_driver = {
+ .name = "vt8231",
+ .id_table = vt8231_pci_ids,
+ .probe = vt8231_pci_probe,
+};
+
+int vt8231_detect(struct i2c_adapter *adapter)
+{
+ struct i2c_client *client;
+ struct vt8231_data *data;
+ int err = 0, i;
+ u16 val;
+
+ /* 8231 requires multiple of 256 */
+ if (force_addr) {
+ isa_address = force_addr & 0xFF00;
+ dev_warn(&adapter->dev, "forcing ISA address 0x%04X\n",
+ isa_address);
+ if (PCIBIOS_SUCCESSFUL != pci_write_config_word(s_bridge,
+ VT8231_BASE_REG, isa_address))
+ return -ENODEV;
+ }
+
+ if (PCIBIOS_SUCCESSFUL !=
+ pci_read_config_word(s_bridge, VT8231_ENABLE_REG, &val))
+ return -ENODEV;
+
+ if (!(val & 0x0001)) {
+ dev_warn(&adapter->dev, "enabling sensors\n");
+ if (PCIBIOS_SUCCESSFUL !=
+ pci_write_config_word(s_bridge, VT8231_ENABLE_REG,
+ val | 0x0001))
+ return -ENODEV;
+ }
+
+ /* Reserve the ISA region */
+ if (!request_region(isa_address, VT8231_EXTENT,
+ vt8231_pci_driver.name)) {
+ dev_err(&adapter->dev, "region 0x%x already in use!\n",
+ isa_address);
+ return -ENODEV;
+ }
+
+ if (!(data = kzalloc(sizeof(struct vt8231_data), GFP_KERNEL))) {
+ err = -ENOMEM;
+ goto exit_release;
+ }
+
+ client = &data->client;
+ i2c_set_clientdata(client, data);
+ client->addr = isa_address;
+ client->adapter = adapter;
+ client->driver = &vt8231_driver;
+ client->dev.parent = &adapter->dev;
+
+ /* Fill in the remaining client fields and put into the global list */
+ strlcpy(client->name, "vt8231", I2C_NAME_SIZE);
+
+ init_MUTEX(&data->update_lock);
+
+ /* Tell the I2C layer a new client has arrived */
+ if ((err = i2c_attach_client(client)))
+ goto exit_free;
+
+ vt8231_init_client(client);
+
+ /* Register sysfs hooks */
+ data->class_dev = hwmon_device_register(&client->dev);
+ if (IS_ERR(data->class_dev)) {
+ err = PTR_ERR(data->class_dev);
+ goto exit_detach;
+ }
+
+ /* Must update device information to find out the config field */
+ data->uch_config = vt8231_read_value(client, VT8231_REG_UCH_CONFIG);
+
+ for (i = 0; i < ARRAY_SIZE(cfg_info_temp); i++) {
+ if (ISTEMP(i, data->uch_config)) {
+ device_create_file(&client->dev,
+ cfg_info_temp[i].input);
+ device_create_file(&client->dev, cfg_info_temp[i].max);
+ device_create_file(&client->dev, cfg_info_temp[i].min);
+ }
+ }
+
+ for (i = 0; i < ARRAY_SIZE(cfg_info_volt); i++) {
+ if (ISVOLT(i, data->uch_config)) {
+ device_create_file(&client->dev,
+ cfg_info_volt[i].input);
+ device_create_file(&client->dev, cfg_info_volt[i].max);
+ device_create_file(&client->dev, cfg_info_volt[i].min);
+ }
+ }
+
+ device_create_file(&client->dev, &sensor_dev_attr_fan1_input.dev_attr);
+ device_create_file(&client->dev, &sensor_dev_attr_fan2_input.dev_attr);
+ device_create_file(&client->dev, &sensor_dev_attr_fan1_min.dev_attr);
+ device_create_file(&client->dev, &sensor_dev_attr_fan2_min.dev_attr);
+ device_create_file(&client->dev, &sensor_dev_attr_fan1_div.dev_attr);
+ device_create_file(&client->dev, &sensor_dev_attr_fan2_div.dev_attr);
+
+ device_create_file(&client->dev, &dev_attr_alarms);
+ return 0;
+
+exit_detach:
+ i2c_detach_client(client);
+exit_free:
+ kfree(data);
+exit_release:
+ release_region(isa_address, VT8231_EXTENT);
+ return err;
+}
+
+static int vt8231_detach_client(struct i2c_client *client)
+{
+ struct vt8231_data *data = i2c_get_clientdata(client);
+ int err;
+
+ hwmon_device_unregister(data->class_dev);
+
+ if ((err = i2c_detach_client(client))) {
+ return err;
+ }
+
+ release_region(client->addr, VT8231_EXTENT);
+ kfree(data);
+
+ return 0;
+}
+
+static void vt8231_init_client(struct i2c_client *client)
+{
+ vt8231_write_value(client, VT8231_REG_TEMP1_CONFIG, 0);
+ vt8231_write_value(client, VT8231_REG_TEMP2_CONFIG, 0);
+}
+
+static struct vt8231_data *vt8231_update_device(struct device *dev)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ struct vt8231_data *data = i2c_get_clientdata(client);
+ int i;
+ u16 low;
+
+ down(&data->update_lock);
+
+ if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
+ || !data->valid) {
+ for (i = 0; i < 6; i++) {
+ if (ISVOLT(i, data->uch_config)) {
+ data->in[i] = vt8231_read_value(client,
+ regvolt[i]);
+ data->in_min[i] = vt8231_read_value(client,
+ regvoltmin[i]);
+ data->in_max[i] = vt8231_read_value(client,
+ regvoltmax[i]);
+ }
+ }
+ for (i = 0; i < 2; i++) {
+ data->fan[i] = vt8231_read_value(client,
+ VT8231_REG_FAN(i));
+ data->fan_min[i] = vt8231_read_value(client,
+ VT8231_REG_FAN_MIN(i));
+ }
+
+ low = vt8231_read_value(client, VT8231_REG_TEMP_LOW01);
+ low = (low >> 6) | ((low & 0x30) >> 2)
+ | (vt8231_read_value(client, VT8231_REG_TEMP_LOW25) << 4);
+ for (i = 0; i < 6; i++) {
+ if (ISTEMP(i, data->uch_config)) {
+ data->temp[i] = (vt8231_read_value(client,
+ regtemp[i]) << 2)
+ | ((low >> (2 * i)) & 0x03);
+ data->temp_max[i] = vt8231_read_value(client,
+ regtempmax[i]);
+ data->temp_min[i] = vt8231_read_value(client,
+ regtempmin[i]);
+ }
+ }
+
+ i = vt8231_read_value(client, VT8231_REG_FANDIV);
+ data->fan_div[0] = (i >> 4) & 0x03;
+ data->fan_div[1] = i >> 6;
+ data->alarms = vt8231_read_value(client, VT8231_REG_ALARM1) |
+ (vt8231_read_value(client, VT8231_REG_ALARM2) << 8);
+
+ /* Set alarm flags correctly */
+ if (!data->fan[0] && data->fan_min[0]) {
+ data->alarms |= 0x40;
+ } else if (data->fan[0] && !data->fan_min[0]) {
+ data->alarms &= ~0x40;
+ }
+
+ if (!data->fan[1] && data->fan_min[1]) {
+ data->alarms |= 0x80;
+ } else if (data->fan[1] && !data->fan_min[1]) {
+ data->alarms &= ~0x80;
+ }
+
+ data->last_updated = jiffies;
+ data->valid = 1;
+ }
+
+ up(&data->update_lock);
+
+ return data;
+}
+
+static int __devinit vt8231_pci_probe(struct pci_dev *dev,
+ const struct pci_device_id *id)
+{
+ u16 val;
+
+ if (PCIBIOS_SUCCESSFUL != pci_read_config_word(dev, VT8231_BASE_REG,
+ &val))
+ return -ENODEV;
+
+ isa_address = val & ~(VT8231_EXTENT - 1);
+ if (isa_address == 0 && force_addr == 0) {
+ dev_err(&dev->dev, "base address not set -\
+ upgrade BIOS or use force_addr=0xaddr\n");
+ return -ENODEV;
+ }
+
+ s_bridge = pci_dev_get(dev);
+
+ if (i2c_isa_add_driver(&vt8231_driver)) {
+ pci_dev_put(s_bridge);
+ s_bridge = NULL;
+ }
+
+ /* Always return failure here. This is to allow other drivers to bind
+ * to this pci device. We don't really want to have control over the
+ * pci device, we only wanted to read as few register values from it.
+ */
+ return -ENODEV;
+}
+
+static int __init sm_vt8231_init(void)
+{
+ return pci_module_init(&vt8231_pci_driver);
+}
+
+static void __exit sm_vt8231_exit(void)
+{
+ pci_unregister_driver(&vt8231_pci_driver);
+ if (s_bridge != NULL) {
+ i2c_isa_del_driver(&vt8231_driver);
+ pci_dev_put(s_bridge);
+ s_bridge = NULL;
+ }
+}
+
+MODULE_AUTHOR("Roger Lucas <roger@planbit.co.uk>");
+MODULE_DESCRIPTION("VT8231 sensors");
+MODULE_LICENSE("GPL");
+
+module_init(sm_vt8231_init);
+module_exit(sm_vt8231_exit);
projects / linux-2.6 / commitdiff