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Diffstat (limited to 'drivers/hwmon/vt8231.c')
| -rw-r--r-- | drivers/hwmon/vt8231.c | 1007 |
1 files changed, 1007 insertions, 0 deletions
diff --git a/drivers/hwmon/vt8231.c b/drivers/hwmon/vt8231.c new file mode 100644 index 0000000..5bc5727 --- /dev/null +++ b/drivers/hwmon/vt8231.c @@ -0,0 +1,1007 @@ +/* + vt8231.c - Part of lm_sensors, Linux kernel modules + for hardware monitoring + + Copyright (c) 2005 Roger Lucas <vt8231@hiddenengine.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/platform_device.h> +#include <linux/hwmon.h> +#include <linux/hwmon-sysfs.h> +#include <linux/hwmon-vid.h> +#include <linux/err.h> +#include <linux/mutex.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"); + +static struct platform_device *pdev; + +#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 { + unsigned short addr; + const char *name; + + struct mutex update_lock; + struct device *hwmon_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_probe(struct platform_device *pdev); +static int __devexit vt8231_remove(struct platform_device *pdev); +static struct vt8231_data *vt8231_update_device(struct device *dev); +static void vt8231_init_device(struct vt8231_data *data); + +static inline int vt8231_read_value(struct vt8231_data *data, u8 reg) +{ + return inb_p(data->addr + reg); +} + +static inline void vt8231_write_value(struct vt8231_data *data, u8 reg, + u8 value) +{ + outb_p(value, data->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 vt8231_data *data = dev_get_drvdata(dev); + unsigned long val = simple_strtoul(buf, NULL, 10); + + mutex_lock(&data->update_lock); + data->in_min[nr] = SENSORS_LIMIT(((val * 958) / 10000) + 3, 0, 255); + vt8231_write_value(data, regvoltmin[nr], data->in_min[nr]); + mutex_unlock(&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 vt8231_data *data = dev_get_drvdata(dev); + unsigned long val = simple_strtoul(buf, NULL, 10); + + mutex_lock(&data->update_lock); + data->in_max[nr] = SENSORS_LIMIT(((val * 958) / 10000) + 3, 0, 255); + vt8231_write_value(data, regvoltmax[nr], data->in_max[nr]); + mutex_unlock(&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 vt8231_data *data = dev_get_drvdata(dev); + unsigned long val = simple_strtoul(buf, NULL, 10); + + mutex_lock(&data->update_lock); + data->in_min[5] = SENSORS_LIMIT(((val * 958 * 34) / (10000 * 54)) + 3, + 0, 255); + vt8231_write_value(data, regvoltmin[5], data->in_min[5]); + mutex_unlock(&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 vt8231_data *data = dev_get_drvdata(dev); + unsigned long val = simple_strtoul(buf, NULL, 10); + + mutex_lock(&data->update_lock); + data->in_max[5] = SENSORS_LIMIT(((val * 958 * 34) / (10000 * 54)) + 3, + 0, 255); + vt8231_write_value(data, regvoltmax[5], data->in_max[5]); + mutex_unlock(&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 vt8231_data *data = dev_get_drvdata(dev); + int val = simple_strtol(buf, NULL, 10); + + mutex_lock(&data->update_lock); + data->temp_max[0] = SENSORS_LIMIT((val + 500) / 1000, 0, 255); + vt8231_write_value(data, regtempmax[0], data->temp_max[0]); + mutex_unlock(&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 vt8231_data *data = dev_get_drvdata(dev); + int val = simple_strtol(buf, NULL, 10); + + mutex_lock(&data->update_lock); + data->temp_min[0] = SENSORS_LIMIT((val + 500) / 1000, 0, 255); + vt8231_write_value(data, regtempmin[0], data->temp_min[0]); + mutex_unlock(&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 vt8231_data *data = dev_get_drvdata(dev); + int val = simple_strtol(buf, NULL, 10); + + mutex_lock(&data->update_lock); + data->temp_max[nr] = SENSORS_LIMIT(TEMP_MAXMIN_TO_REG(val), 0, 255); + vt8231_write_value(data, regtempmax[nr], data->temp_max[nr]); + mutex_unlock(&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 vt8231_data *data = dev_get_drvdata(dev); + int val = simple_strtol(buf, NULL, 10); + + mutex_lock(&data->update_lock); + data->temp_min[nr] = SENSORS_LIMIT(TEMP_MAXMIN_TO_REG(val), 0, 255); + vt8231_write_value(data, regtempmin[nr], data->temp_min[nr]); + mutex_unlock(&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##_max_hyst, 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_max_hyst, 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); + +/* 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 vt8231_data *data = dev_get_drvdata(dev); + int val = simple_strtoul(buf, NULL, 10); + + mutex_lock(&data->update_lock); + data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr])); + vt8231_write_value(data, VT8231_REG_FAN_MIN(nr), data->fan_min[nr]); + mutex_unlock(&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 vt8231_data *data = dev_get_drvdata(dev); + 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(data, VT8231_REG_FANDIV); + long min = FAN_FROM_REG(data->fan_min[nr], + DIV_FROM_REG(data->fan_div[nr])); + + mutex_lock(&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(dev, "fan_div value %ld not supported. " + "Choose one of 1, 2, 4 or 8!\n", val); + mutex_unlock(&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(data, 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(data, VT8231_REG_FANDIV, old); + mutex_unlock(&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 ssize_t show_alarm(struct device *dev, struct device_attribute *attr, + char *buf) +{ + int bitnr = to_sensor_dev_attr(attr)->index; + struct vt8231_data *data = vt8231_update_device(dev); + return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1); +} +static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 4); +static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 11); +static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL, 0); +static SENSOR_DEVICE_ATTR(temp4_alarm, S_IRUGO, show_alarm, NULL, 1); +static SENSOR_DEVICE_ATTR(temp5_alarm, S_IRUGO, show_alarm, NULL, 3); +static SENSOR_DEVICE_ATTR(temp6_alarm, S_IRUGO, show_alarm, NULL, 8); +static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 11); +static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 0); +static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 1); +static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 3); +static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 8); +static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 2); +static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 6); +static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 7); + +static ssize_t show_name(struct device *dev, struct device_attribute + *devattr, char *buf) +{ + struct vt8231_data *data = dev_get_drvdata(dev); + return sprintf(buf, "%s\n", data->name); +} +static DEVICE_ATTR(name, S_IRUGO, show_name, NULL); + +static struct attribute *vt8231_attributes_temps[6][5] = { + { + &dev_attr_temp1_input.attr, + &dev_attr_temp1_max_hyst.attr, + &dev_attr_temp1_max.attr, + &sensor_dev_attr_temp1_alarm.dev_attr.attr, + NULL + }, { + &sensor_dev_attr_temp2_input.dev_attr.attr, + &sensor_dev_attr_temp2_max_hyst.dev_attr.attr, + &sensor_dev_attr_temp2_max.dev_attr.attr, + &sensor_dev_attr_temp2_alarm.dev_attr.attr, + NULL + }, { + &sensor_dev_attr_temp3_input.dev_attr.attr, + &sensor_dev_attr_temp3_max_hyst.dev_attr.attr, + &sensor_dev_attr_temp3_max.dev_attr.attr, + &sensor_dev_attr_temp3_alarm.dev_attr.attr, + NULL + }, { + &sensor_dev_attr_temp4_input.dev_attr.attr, + &sensor_dev_attr_temp4_max_hyst.dev_attr.attr, + &sensor_dev_attr_temp4_max.dev_attr.attr, + &sensor_dev_attr_temp4_alarm.dev_attr.attr, + NULL + }, { + &sensor_dev_attr_temp5_input.dev_attr.attr, + &sensor_dev_attr_temp5_max_hyst.dev_attr.attr, + &sensor_dev_attr_temp5_max.dev_attr.attr, + &sensor_dev_attr_temp5_alarm.dev_attr.attr, + NULL + }, { + &sensor_dev_attr_temp6_input.dev_attr.attr, + &sensor_dev_attr_temp6_max_hyst.dev_attr.attr, + &sensor_dev_attr_temp6_max.dev_attr.attr, + &sensor_dev_attr_temp6_alarm.dev_attr.attr, + NULL + } +}; + +static const struct attribute_group vt8231_group_temps[6] = { + { .attrs = vt8231_attributes_temps[0] }, + { .attrs = vt8231_attributes_temps[1] }, + { .attrs = vt8231_attributes_temps[2] }, + { .attrs = vt8231_attributes_temps[3] }, + { .attrs = vt8231_attributes_temps[4] }, + { .attrs = vt8231_attributes_temps[5] }, +}; + +static struct attribute *vt8231_attributes_volts[6][5] = { + { + &sensor_dev_attr_in0_input.dev_attr.attr, + &sensor_dev_attr_in0_min.dev_attr.attr, + &sensor_dev_attr_in0_max.dev_attr.attr, + &sensor_dev_attr_in0_alarm.dev_attr.attr, + NULL + }, { + &sensor_dev_attr_in1_input.dev_attr.attr, + &sensor_dev_attr_in1_min.dev_attr.attr, + &sensor_dev_attr_in1_max.dev_attr.attr, + &sensor_dev_attr_in1_alarm.dev_attr.attr, + NULL + }, { + &sensor_dev_attr_in2_input.dev_attr.attr, + &sensor_dev_attr_in2_min.dev_attr.attr, + &sensor_dev_attr_in2_max.dev_attr.attr, + &sensor_dev_attr_in2_alarm.dev_attr.attr, + NULL + }, { + &sensor_dev_attr_in3_input.dev_attr.attr, + &sensor_dev_attr_in3_min.dev_attr.attr, + &sensor_dev_attr_in3_max.dev_attr.attr, + &sensor_dev_attr_in3_alarm.dev_attr.attr, + NULL + }, { + &sensor_dev_attr_in4_input.dev_attr.attr, + &sensor_dev_attr_in4_min.dev_attr.attr, + &sensor_dev_attr_in4_max.dev_attr.attr, + &sensor_dev_attr_in4_alarm.dev_attr.attr, + NULL + }, { + &dev_attr_in5_input.attr, + &dev_attr_in5_min.attr, + &dev_attr_in5_max.attr, + &sensor_dev_attr_in5_alarm.dev_attr.attr, + NULL + } +}; + +static const struct attribute_group vt8231_group_volts[6] = { + { .attrs = vt8231_attributes_volts[0] }, + { .attrs = vt8231_attributes_volts[1] }, + { .attrs = vt8231_attributes_volts[2] }, + { .attrs = vt8231_attributes_volts[3] }, + { .attrs = vt8231_attributes_volts[4] }, + { .attrs = vt8231_attributes_volts[5] }, +}; + +static struct attribute *vt8231_attributes[] = { + &sensor_dev_attr_fan1_input.dev_attr.attr, + &sensor_dev_attr_fan2_input.dev_attr.attr, + &sensor_dev_attr_fan1_min.dev_attr.attr, + &sensor_dev_attr_fan2_min.dev_attr.attr, + &sensor_dev_attr_fan1_div.dev_attr.attr, + &sensor_dev_attr_fan2_div.dev_attr.attr, + &sensor_dev_attr_fan1_alarm.dev_attr.attr, + &sensor_dev_attr_fan2_alarm.dev_attr.attr, + &dev_attr_alarms.attr, + &dev_attr_name.attr, + NULL +}; + +static const struct attribute_group vt8231_group = { + .attrs = vt8231_attributes, +}; + +static struct platform_driver vt8231_driver = { + .driver = { + .owner = THIS_MODULE, + .name = "vt8231", + }, + .probe = vt8231_probe, + .remove = __devexit_p(vt8231_remove), +}; + +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, +}; + +static int vt8231_probe(struct platform_device *pdev) +{ + struct resource *res; + struct vt8231_data *data; + int err = 0, i; + + /* Reserve the ISA region */ + res = platform_get_resource(pdev, IORESOURCE_IO, 0); + if (!request_region(res->start, VT8231_EXTENT, + vt8231_driver.driver.name)) { + dev_err(&pdev->dev, "Region 0x%lx-0x%lx already in use!\n", + (unsigned long)res->start, (unsigned long)res->end); + return -ENODEV; + } + + if (!(data = kzalloc(sizeof(struct vt8231_data), GFP_KERNEL))) { + err = -ENOMEM; + goto exit_release; + } + + platform_set_drvdata(pdev, data); + data->addr = res->start; + data->name = "vt8231"; + + mutex_init(&data->update_lock); + vt8231_init_device(data); + + /* Register sysfs hooks */ + if ((err = sysfs_create_group(&pdev->dev.kobj, &vt8231_group))) + goto exit_free; + + /* Must update device information to find out the config field */ + data->uch_config = vt8231_read_value(data, VT8231_REG_UCH_CONFIG); + + for (i = 0; i < ARRAY_SIZE(vt8231_group_temps); i++) { + if (ISTEMP(i, data->uch_config)) { + if ((err = sysfs_create_group(&pdev->dev.kobj, + &vt8231_group_temps[i]))) + goto exit_remove_files; + } + } + + for (i = 0; i < ARRAY_SIZE(vt8231_group_volts); i++) { + if (ISVOLT(i, data->uch_config)) { + if ((err = sysfs_create_group(&pdev->dev.kobj, + &vt8231_group_volts[i]))) + goto exit_remove_files; + } + } + + data->hwmon_dev = hwmon_device_register(&pdev->dev); + if (IS_ERR(data->hwmon_dev)) { + err = PTR_ERR(data->hwmon_dev); + goto exit_remove_files; + } + return 0; + +exit_remove_files: + for (i = 0; i < ARRAY_SIZE(vt8231_group_volts); i++) + sysfs_remove_group(&pdev->dev.kobj, &vt8231_group_volts[i]); + + for (i = 0; i < ARRAY_SIZE(vt8231_group_temps); i++) + sysfs_remove_group(&pdev->dev.kobj, &vt8231_group_temps[i]); + + sysfs_remove_group(&pdev->dev.kobj, &vt8231_group); + +exit_free: + platform_set_drvdata(pdev, NULL); + kfree(data); + +exit_release: + release_region(res->start, VT8231_EXTENT); + return err; +} + +static int __devexit vt8231_remove(struct platform_device *pdev) +{ + struct vt8231_data *data = platform_get_drvdata(pdev); + int i; + + hwmon_device_unregister(data->hwmon_dev); + + for (i = 0; i < ARRAY_SIZE(vt8231_group_volts); i++) + sysfs_remove_group(&pdev->dev.kobj, &vt8231_group_volts[i]); + + for (i = 0; i < ARRAY_SIZE(vt8231_group_temps); i++) + sysfs_remove_group(&pdev->dev.kobj, &vt8231_group_temps[i]); + + sysfs_remove_group(&pdev->dev.kobj, &vt8231_group); + + release_region(data->addr, VT8231_EXTENT); + platform_set_drvdata(pdev, NULL); + kfree(data); + return 0; +} + +static void vt8231_init_device(struct vt8231_data *data) +{ + vt8231_write_value(data, VT8231_REG_TEMP1_CONFIG, 0); + vt8231_write_value(data, VT8231_REG_TEMP2_CONFIG, 0); +} + +static struct vt8231_data *vt8231_update_device(struct device *dev) +{ + struct vt8231_data *data = dev_get_drvdata(dev); + int i; + u16 low; + + mutex_lock(&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(data, + regvolt[i]); + data->in_min[i] = vt8231_read_value(data, + regvoltmin[i]); + data->in_max[i] = vt8231_read_value(data, + regvoltmax[i]); + } + } + for (i = 0; i < 2; i++) { + data->fan[i] = vt8231_read_value(data, + VT8231_REG_FAN(i)); + data->fan_min[i] = vt8231_read_value(data, + VT8231_REG_FAN_MIN(i)); + } + + low = vt8231_read_value(data, VT8231_REG_TEMP_LOW01); + low = (low >> 6) | ((low & 0x30) >> 2) + | (vt8231_read_value(data, VT8231_REG_TEMP_LOW25) << 4); + for (i = 0; i < 6; i++) { + if (ISTEMP(i, data->uch_config)) { + data->temp[i] = (vt8231_read_value(data, + regtemp[i]) << 2) + | ((low >> (2 * i)) & 0x03); + data->temp_max[i] = vt8231_read_value(data, + regtempmax[i]); + data->temp_min[i] = vt8231_read_value(data, + regtempmin[i]); + } + } + + i = vt8231_read_value(data, VT8231_REG_FANDIV); + data->fan_div[0] = (i >> 4) & 0x03; + data->fan_div[1] = i >> 6; + data->alarms = vt8231_read_value(data, VT8231_REG_ALARM1) | + (vt8231_read_value(data, 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; + } + + mutex_unlock(&data->update_lock); + + return data; +} + +static int __devinit vt8231_device_add(unsigned short address) +{ + struct resource res = { + .start = address, + .end = address + VT8231_EXTENT - 1, + .name = "vt8231", + .flags = IORESOURCE_IO, + }; + int err; + + pdev = platform_device_alloc("vt8231", address); + if (!pdev) { + err = -ENOMEM; + printk(KERN_ERR "vt8231: Device allocation failed\n"); + goto exit; + } + + err = platform_device_add_resources(pdev, &res, 1); + if (err) { + printk(KERN_ERR "vt8231: Device resource addition failed " + "(%d)\n", err); + goto exit_device_put; + } + + err = platform_device_add(pdev); + if (err) { + printk(KERN_ERR "vt8231: Device addition failed (%d)\n", + err); + goto exit_device_put; + } + + return 0; + +exit_device_put: + platform_device_put(pdev); +exit: + return err; +} + +static int __devinit vt8231_pci_probe(struct pci_dev *dev, + const struct pci_device_id *id) +{ + u16 address, val; + if (force_addr) { + address = force_addr & 0xff00; + dev_warn(&dev->dev, "Forcing ISA address 0x%x\n", + address); + + if (PCIBIOS_SUCCESSFUL != + pci_write_config_word(dev, VT8231_BASE_REG, address | 1)) + return -ENODEV; + } + + if (PCIBIOS_SUCCESSFUL != pci_read_config_word(dev, VT8231_BASE_REG, + &val)) + return -ENODEV; + + address = val & ~(VT8231_EXTENT - 1); + if (address == 0) { + dev_err(&dev->dev, "base address not set -\ + upgrade BIOS or use force_addr=0xaddr\n"); + return -ENODEV; + } + + if (PCIBIOS_SUCCESSFUL != pci_read_config_word(dev, VT8231_ENABLE_REG, + &val)) + return -ENODEV; + + if (!(val & 0x0001)) { + dev_warn(&dev->dev, "enabling sensors\n"); + if (PCIBIOS_SUCCESSFUL != + pci_write_config_word(dev, VT8231_ENABLE_REG, + val | 0x0001)) + return -ENODEV; + } + + if (platform_driver_register(&vt8231_driver)) + goto exit; + + /* Sets global pdev as a side effect */ + if (vt8231_device_add(address)) + goto exit_unregister; + + /* 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. + */ + + /* We do, however, mark ourselves as using the PCI device to stop it + getting unloaded. */ + s_bridge = pci_dev_get(dev); + return -ENODEV; + +exit_unregister: + platform_driver_unregister(&vt8231_driver); +exit: + return -ENODEV; +} + +static int __init sm_vt8231_init(void) +{ + return pci_register_driver(&vt8231_pci_driver); +} + +static void __exit sm_vt8231_exit(void) +{ + pci_unregister_driver(&vt8231_pci_driver); + if (s_bridge != NULL) { + platform_device_unregister(pdev); + platform_driver_unregister(&vt8231_driver); + pci_dev_put(s_bridge); + s_bridge = NULL; + } +} + +MODULE_AUTHOR("Roger Lucas <vt8231@hiddenengine.co.uk>"); +MODULE_DESCRIPTION("VT8231 sensors"); +MODULE_LICENSE("GPL"); + +module_init(sm_vt8231_init); +module_exit(sm_vt8231_exit); |
