cregit-Linux how code gets into the kernel

Release 4.14 drivers/hwmon/vt8231.c

Directory: drivers/hwmon
/*
 * 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); }

Contributors

PersonTokensPropCommitsCommitProp
Roger Lucas3685.71%133.33%
Dan Carpenter511.90%133.33%
Guenter Roeck12.38%133.33%
Total42100.00%3100.00%

#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); }

Contributors

PersonTokensPropCommitsCommitProp
Roger Lucas25100.00%2100.00%
Total25100.00%2100.00%


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

Contributors

PersonTokensPropCommitsCommitProp
Roger Lucas29100.00%2100.00%
Total29100.00%2100.00%

/* 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); }

Contributors

PersonTokensPropCommitsCommitProp
Roger Lucas72100.00%1100.00%
Total72100.00%1100.00%


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); }

Contributors

PersonTokensPropCommitsCommitProp
Roger Lucas72100.00%1100.00%
Total72100.00%1100.00%


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)); }

Contributors

PersonTokensPropCommitsCommitProp
Roger Lucas74100.00%1100.00%
Total74100.00%1100.00%


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; }

Contributors

PersonTokensPropCommitsCommitProp
Roger Lucas11884.89%240.00%
Guenter Roeck1913.67%240.00%
Ingo Molnar21.44%120.00%
Total139100.00%5100.00%


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; }

Contributors

PersonTokensPropCommitsCommitProp
Roger Lucas11884.89%240.00%
Guenter Roeck1913.67%240.00%
Ingo Molnar21.44%120.00%
Total139100.00%5100.00%

/* Special case for input 5 as this has 3.3V scaling built into the chip */
static ssize_t in5_input_show(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))); }

Contributors

PersonTokensPropCommitsCommitProp
Roger Lucas6298.41%150.00%
Julia Lawall11.59%150.00%
Total63100.00%2100.00%


static ssize_t in5_min_show(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))); }

Contributors

PersonTokensPropCommitsCommitProp
Roger Lucas6298.41%150.00%
Julia Lawall11.59%150.00%
Total63100.00%2100.00%


static ssize_t in5_max_show(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))); }

Contributors

PersonTokensPropCommitsCommitProp
Roger Lucas6298.41%150.00%
Julia Lawall11.59%150.00%
Total63100.00%2100.00%


static ssize_t in5_min_store(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; }

Contributors

PersonTokensPropCommitsCommitProp
Roger Lucas10682.81%233.33%
Guenter Roeck1914.84%233.33%
Ingo Molnar21.56%116.67%
Julia Lawall10.78%116.67%
Total128100.00%6100.00%


static ssize_t in5_max_store(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; }

Contributors

PersonTokensPropCommitsCommitProp
Roger Lucas10682.81%233.33%
Guenter Roeck1914.84%233.33%
Ingo Molnar21.56%116.67%
Julia Lawall10.78%116.67%
Total128100.00%6100.00%

#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_RO(in5_input); static DEVICE_ATTR_RW(in5_min); static DEVICE_ATTR_RW(in5_max); /* Temperatures */
static ssize_t temp1_input_show(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); }

Contributors

PersonTokensPropCommitsCommitProp
Roger Lucas4697.87%150.00%
Julia Lawall12.13%150.00%
Total47100.00%2100.00%


static ssize_t temp1_max_show(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); }

Contributors

PersonTokensPropCommitsCommitProp
Roger Lucas4697.87%150.00%
Julia Lawall12.13%150.00%
Total47100.00%2100.00%


static ssize_t temp1_max_hyst_show(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); }

Contributors

PersonTokensPropCommitsCommitProp
Roger Lucas4697.87%150.00%
Julia Lawall12.13%150.00%
Total47100.00%2100.00%


static ssize_t temp1_max_store(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; }

Contributors

PersonTokensPropCommitsCommitProp
Roger Lucas9480.34%233.33%
Guenter Roeck2017.09%233.33%
Ingo Molnar21.71%116.67%
Julia Lawall10.85%116.67%
Total117100.00%6100.00%


static ssize_t temp1_max_hyst_store(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; }

Contributors

PersonTokensPropCommitsCommitProp
Roger Lucas9480.34%233.33%
Guenter Roeck2017.09%233.33%
Ingo Molnar21.71%116.67%
Julia Lawall10.85%116.67%
Total117100.00%6100.00%


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])); }

Contributors

PersonTokensPropCommitsCommitProp
Roger Lucas65100.00%1100.00%
Total65100.00%1100.00%


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])); }

Contributors

PersonTokensPropCommitsCommitProp
Roger Lucas65100.00%1100.00%
Total65100.00%1100.00%


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])); }

Contributors

PersonTokensPropCommitsCommitProp
Roger Lucas65100.00%1100.00%
Total65100.00%1100.00%


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; }

Contributors

PersonTokensPropCommitsCommitProp
Roger Lucas10983.21%240.00%
Guenter Roeck2015.27%240.00%
Ingo Molnar21.53%120.00%
Total131100.00%5100.00%


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; }

Contributors

PersonTokensPropCommitsCommitProp
Roger Lucas10983.21%240.00%
Guenter Roeck2015.27%240.00%
Ingo Molnar21.53%120.00%
Total131100.00%5100.00%

/* * 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_RO(temp1_input); static DEVICE_ATTR_RW(temp1_max); static DEVICE_ATTR_RW(temp1_max_hyst); 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]))); }

Contributors

PersonTokensPropCommitsCommitProp
Roger Lucas75100.00%1100.00%
Total75100.00%1100.00%


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]))); }

Contributors

PersonTokensPropCommitsCommitProp
Roger Lucas75100.00%1100.00%
Total75100.00%1100.00%


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])); }

Contributors

PersonTokensPropCommitsCommitProp
Roger Lucas65100.00%1100.00%
Total65100.00%1100.00%


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; }

Contributors

PersonTokensPropCommitsCommitProp
Roger Lucas11383.70%250.00%
Guenter Roeck2014.81%125.00%
Ingo Molnar21.48%125.00%
Total135100.00%4100.00%


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; }

Contributors

PersonTokensPropCommitsCommitProp
Roger Lucas26290.97%240.00%
Guenter Roeck237.99%240.00%
Ingo Molnar31.04%120.00%
Total288100.00%5100.00%

#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 alarms_show(struct device *dev, struct device_attribute *attr, char *buf) { struct vt8231_data *data = vt8231_update_device(dev); return sprintf(buf, "%d\n", data->alarms); }

Contributors

PersonTokensPropCommitsCommitProp
Roger Lucas4197.62%150.00%
Julia Lawall12.38%150.00%
Total42100.00%2100.00%

static DEVICE_ATTR_RO(alarms);
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); }

Contributors

PersonTokensPropCommitsCommitProp
Jean Delvare58100.00%1100.00%
Total58100.00%1100.00%

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 name_show(struct device *dev, struct device_attribute *devattr, char *buf) { struct vt8231_data *data = dev_get_drvdata(dev); return sprintf(buf, "%s\n", data->name); }

Contributors

PersonTokensPropCommitsCommitProp
Roger Lucas4197.62%150.00%
Julia Lawall12.38%150.00%
Total42100.00%2100.00%

static DEVICE_ATTR_RO(name); 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; }

Contributors

PersonTokensPropCommitsCommitProp
Roger Lucas38490.78%337.50%
Guenter Roeck348.04%225.00%
Tony Jones30.71%112.50%
Mark M. Hoffman10.24%112.50%
Ingo Molnar10.24%112.50%
Total423100.00%8100.00%


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; }

Contributors

PersonTokensPropCommitsCommitProp
Roger Lucas11099.10%375.00%
Tony Jones10.90%125.00%
Total111100.00%4100.00%


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); }

Contributors

PersonTokensPropCommitsCommitProp
Roger Lucas29100.00%2100.00%
Total29100.00%2100.00%


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; }

Contributors

PersonTokensPropCommitsCommitProp
Roger Lucas49999.60%266.67%
Ingo Molnar20.40%133.33%
Total501100.00%3100.00%


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

PersonTokensPropCommitsCommitProp
Roger Lucas13286.27%133.33%
Jean Delvare159.80%133.33%
Joe Perches63.92%133.33%
Total153100.00%3100.00%


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

PersonTokensPropCommitsCommitProp
Roger Lucas22098.65%250.00%
Guenter Roeck20.90%125.00%
Joe Perches10.45%125.00%
Total223100.00%4100.00%


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

Contributors

PersonTokensPropCommitsCommitProp
Roger Lucas1593.75%150.00%
Richard Knutsson16.25%150.00%
Total16100.00%2100.00%


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

PersonTokensPropCommitsCommitProp
Roger Lucas43100.00%2100.00%
Total43100.00%2100.00%

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

PersonTokensPropCommitsCommitProp
Roger Lucas499887.65%416.67%
Jean Delvare3766.59%416.67%
Guenter Roeck2444.28%520.83%
Ingo Molnar280.49%14.17%
Julia Lawall200.35%14.17%
Joe Perches140.25%28.33%
Tony Jones60.11%14.17%
Jingoo Han60.11%14.17%
Dan Carpenter50.09%14.17%
Laurent Riffard20.04%14.17%
Richard Knutsson10.02%14.17%
Mark M. Hoffman10.02%14.17%
H Hartley Sweeten10.02%14.17%
Total5702100.00%24100.00%
Directory: drivers/hwmon
Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.
Created with cregit.