Release 4.7 drivers/hwmon/vt8231.c

/*
 * 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
 */


#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

#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 <linux/acpi.h>
#include <linux/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 || rpm > 1310720)
		return 0;
	return clamp_val(1310720 / (rpm * div), 1, 255);
}

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#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 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);
}

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static inline void vt8231_write_value(struct vt8231_data *data, u8 reg,
					u8 value)
{
	outb_p(value, data->addr + reg);
}

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/* 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);
}

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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);
}

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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));
}

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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;
	int err;

	err = kstrtoul(buf, 10, &val);
	if (err)
		return err;

	mutex_lock(&data->update_lock);
	data->in_min[nr] = clamp_val(((val * 958) / 10000) + 3, 0, 255);
	vt8231_write_value(data, regvoltmin[nr], data->in_min[nr]);
	mutex_unlock(&data->update_lock);
	return count;
}

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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;
	int err;

	err = kstrtoul(buf, 10, &val);
	if (err)
		return err;

	mutex_lock(&data->update_lock);
	data->in_max[nr] = clamp_val(((val * 958) / 10000) + 3, 0, 255);
	vt8231_write_value(data, regvoltmax[nr], data->in_max[nr]);
	mutex_unlock(&data->update_lock);
	return count;
}

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/* 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)));
}

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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)));
}

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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)));
}

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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;
	int err;

	err = kstrtoul(buf, 10, &val);
	if (err)
		return err;

	mutex_lock(&data->update_lock);
	data->in_min[5] = clamp_val(((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;
}

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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;
	int err;

	err = kstrtoul(buf, 10, &val);
	if (err)
		return err;

	mutex_lock(&data->update_lock);
	data->in_max[5] = clamp_val(((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;
}

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#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);
}

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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);
}

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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);
}

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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);
	long val;
	int err;

	err = kstrtol(buf, 10, &val);
	if (err)
		return err;

	mutex_lock(&data->update_lock);
	data->temp_max[0] = clamp_val((val + 500) / 1000, 0, 255);
	vt8231_write_value(data, regtempmax[0], data->temp_max[0]);
	mutex_unlock(&data->update_lock);
	return count;
}
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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);
	long val;
	int err;

	err = kstrtol(buf, 10, &val);
	if (err)
		return err;

	mutex_lock(&data->update_lock);
	data->temp_min[0] = clamp_val((val + 500) / 1000, 0, 255);
	vt8231_write_value(data, regtempmin[0], data->temp_min[0]);
	mutex_unlock(&data->update_lock);
	return count;
}

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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]));
}

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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]));
}

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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]));
}

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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);
	long val;
	int err;

	err = kstrtol(buf, 10, &val);
	if (err)
		return err;

	mutex_lock(&data->update_lock);
	data->temp_max[nr] = clamp_val(TEMP_MAXMIN_TO_REG(val), 0, 255);
	vt8231_write_value(data, regtempmax[nr], data->temp_max[nr]);
	mutex_unlock(&data->update_lock);
	return count;
}
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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);
	long val;
	int err;

	err = kstrtol(buf, 10, &val);
	if (err)
		return err;

	mutex_lock(&data->update_lock);
	data->temp_min[nr] = clamp_val(TEMP_MAXMIN_TO_REG(val), 0, 255);
	vt8231_write_value(data, regtempmin[nr], data->temp_min[nr]);
	mutex_unlock(&data->update_lock);
	return count;
}

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/*
 * 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])));
}

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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])));
}

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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]));
}

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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);
	unsigned long val;
	int err;

	err = kstrtoul(buf, 10, &val);
	if (err)
		return err;

	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;
}

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20
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ingo molnar
2
1.48%
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135
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4
100.00%



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;
	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]));
	int err;

	err = kstrtoul(buf, 10, &val);
	if (err)
		return err;

	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;
}


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guenter roeck
23
7.99%
2
40.00%
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ingo molnar
3
1.04%
1
20.00%
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288
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5
100.00%


#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);
}
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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);
}
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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);
}
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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 = {
		.name	= "vt8231",
        },
	.probe	= vt8231_probe,
	.remove	= vt8231_remove,
};


static const 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 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 (!devm_request_region(&pdev->dev, 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;
	}

	data = devm_kzalloc(&pdev->dev, sizeof(struct vt8231_data), GFP_KERNEL);
	if (!data)
		return -ENOMEM;

	platform_set_drvdata(pdev, data);
	data->addr = res->start;
	data->name = "vt8231";

	mutex_init(&data->update_lock);
	vt8231_init_device(data);

	/* Register sysfs hooks */
	err = sysfs_create_group(&pdev->dev.kobj, &vt8231_group);
	if (err)
		return err;

	/* 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)) {
			err = sysfs_create_group(&pdev->dev.kobj,
						 &vt8231_group_temps[i]);
			if (err)
				goto exit_remove_files;
		}
	}

	for (i = 0; i < ARRAY_SIZE(vt8231_group_volts); i++) {
		if (ISVOLT(i, data->uch_config)) {
			err = sysfs_create_group(&pdev->dev.kobj,
						 &vt8231_group_volts[i]);
			if (err)
				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);
	return err;
}

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guenter roeck
34
8.04%
2
25.00%
tony jones
tony jones
3
0.71%
1
12.50%
mark m. hoffman
mark m. hoffman
1
0.24%
1
12.50%
ingo molnar
ingo molnar
1
0.24%
1
12.50%
Total
423
100.00%
8
100.00%



static int 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);

	return 0;
}

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100.00%
4
100.00%



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);
}

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100.00%



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;
}

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501
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100.00%



static int vt8231_device_add(unsigned short address)
{
	struct resource res = {
		.start	= address,
		.end	= address + VT8231_EXTENT - 1,
		.name	= "vt8231",
		.flags	= IORESOURCE_IO,
        };
	int err;

	err = acpi_check_resource_conflict(&res);
	if (err)
		goto exit;

	pdev = platform_device_alloc("vt8231", address);
	if (!pdev) {
		err = -ENOMEM;
		pr_err("Device allocation failed\n");
		goto exit;
	}

	err = platform_device_add_resources(pdev, &res, 1);
	if (err) {
		pr_err("Device resource addition failed (%d)\n", err);
		goto exit_device_put;
	}

	err = platform_device_add(pdev);
	if (err) {
		pr_err("Device addition failed (%d)\n", err);
		goto exit_device_put;
	}

	return 0;

exit_device_put:
	platform_device_put(pdev);
exit:
	return err;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
roger lucas
roger lucas
132
86.27%
1
33.33%
jean delvare
jean delvare
15
9.80%
1
33.33%
joe perches
joe perches
6
3.92%
1
33.33%
Total
153
100.00%
3
100.00%



static int 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;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
roger lucas
roger lucas
220
98.65%
2
50.00%
guenter roeck
guenter roeck
2
0.90%
1
25.00%
joe perches
joe perches
1
0.45%
1
25.00%
Total
223
100.00%
4
100.00%



static int __init sm_vt8231_init(void)
{
	return pci_register_driver(&vt8231_pci_driver);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
roger lucas
roger lucas
15
93.75%
1
50.00%
richard knutsson
richard knutsson
1
6.25%
1
50.00%
Total
16
100.00%
2
100.00%



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;
	}
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
roger lucas
roger lucas
43
100.00%
2
100.00%
Total
43
100.00%
2
100.00%

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);
Overall Contributors
Person
Tokens
Prop
Commits
CommitProp
roger lucas
roger lucas
5074
88.12%
4
17.39%
jean delvare
jean delvare
376
6.53%
4
17.39%
guenter roeck
guenter roeck
244
4.24%
5
21.74%
ingo molnar
ingo molnar
28
0.49%
1
4.35%
joe perches
joe perches
14
0.24%
2
8.70%
jingoo han
jingoo han
6
0.10%
1
4.35%
tony jones
tony jones
6
0.10%
1
4.35%
dan carpenter
dan carpenter
5
0.09%
1
4.35%
laurent riffard
laurent riffard
2
0.03%
1
4.35%
mark m. hoffman
mark m. hoffman
1
0.02%
1
4.35%
h hartley sweeten
h hartley sweeten
1
0.02%
1
4.35%
richard knutsson
richard knutsson
1
0.02%
1
4.35%
Total
5758
100.00%
23
100.00%
  
Directory: drivers/hwmon

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