cregit-Linux how code gets into the kernel

Release 4.14 drivers/hwmon/via686a.c

Directory: drivers/hwmon
/*
 * via686a.c - Part of lm_sensors, Linux kernel modules
 *             for hardware monitoring
 *
 * Copyright (c) 1998 - 2002  Frodo Looijaard <frodol@dds.nl>,
 *                            Kyösti Mälkki <kmalkki@cc.hut.fi>,
 *                            Mark Studebaker <mdsxyz123@yahoo.com>,
 *                            and Bob Dougherty <bobd@stanford.edu>
 *
 * (Some conversion-factor data were contributed by Jonathan Teh Soon Yew
 * <j.teh@iname.com> and Alex van Kaam <darkside@chello.nl>.)
 *
 * 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 the Via VT82C686A, VT82C686B south bridges.
 * Reports all as a 686A.
 * Warning - only supports a single device.
 */


#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

#include <linux/module.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/err.h>
#include <linux/init.h>
#include <linux/mutex.h>
#include <linux/sysfs.h>
#include <linux/acpi.h>
#include <linux/io.h>


/*
 * If force_addr is set to anything different from 0, we forcibly enable
 * the device at the given address.
 */

static unsigned short force_addr;
module_param(force_addr, ushort, 0);
MODULE_PARM_DESC(force_addr,
		 "Initialize the base address of the sensors");


static struct platform_device *pdev;

/*
 * The Via 686a southbridge has a LM78-like chip integrated on the same IC.
 * This driver is a customized copy of lm78.c
 */

/* Many VIA686A constants specified below */

/* Length of ISA address segment */

#define VIA686A_EXTENT		0x80

#define VIA686A_BASE_REG	0x70

#define VIA686A_ENABLE_REG	0x74

/* The VIA686A registers */
/* ins numbered 0-4 */

#define VIA686A_REG_IN_MAX(nr)	(0x2b + ((nr) * 2))

#define VIA686A_REG_IN_MIN(nr)	(0x2c + ((nr) * 2))

#define VIA686A_REG_IN(nr)	(0x22 + (nr))

/* fans numbered 1-2 */

#define VIA686A_REG_FAN_MIN(nr)	(0x3a + (nr))

#define VIA686A_REG_FAN(nr)	(0x28 + (nr))

/* temps numbered 1-3 */

static const u8 VIA686A_REG_TEMP[]	= { 0x20, 0x21, 0x1f };

static const u8 VIA686A_REG_TEMP_OVER[]	= { 0x39, 0x3d, 0x1d };

static const u8 VIA686A_REG_TEMP_HYST[]	= { 0x3a, 0x3e, 0x1e };
/* bits 7-6 */

#define VIA686A_REG_TEMP_LOW1	0x4b
/* 2 = bits 5-4, 3 = bits 7-6 */

#define VIA686A_REG_TEMP_LOW23	0x49


#define VIA686A_REG_ALARM1	0x41

#define VIA686A_REG_ALARM2	0x42

#define VIA686A_REG_FANDIV	0x47

#define VIA686A_REG_CONFIG	0x40
/*
 * The following register sets temp interrupt mode (bits 1-0 for temp1,
 * 3-2 for temp2, 5-4 for temp3).  Modes are:
 * 00 interrupt stays as long as value is out-of-range
 * 01 interrupt is cleared once register is read (default)
 * 10 comparator mode- like 00, but ignores hysteresis
 * 11 same as 00
 */

#define VIA686A_REG_TEMP_MODE		0x4b
/* We'll just assume that you want to set all 3 simultaneously: */

#define VIA686A_TEMP_MODE_MASK		0x3F

#define VIA686A_TEMP_MODE_CONTINUOUS	0x00

/*
 * Conversions. Limit checking is only done on the TO_REG
 * variants.
 *
 ******** VOLTAGE CONVERSIONS (Bob Dougherty) ********
 * From HWMon.cpp (Copyright 1998-2000 Jonathan Teh Soon Yew):
 * voltagefactor[0]=1.25/2628; (2628/1.25=2102.4)   // Vccp
 * voltagefactor[1]=1.25/2628; (2628/1.25=2102.4)   // +2.5V
 * voltagefactor[2]=1.67/2628; (2628/1.67=1573.7)   // +3.3V
 * voltagefactor[3]=2.6/2628;  (2628/2.60=1010.8)   // +5V
 * voltagefactor[4]=6.3/2628;  (2628/6.30=417.14)   // +12V
 * in[i]=(data[i+2]*25.0+133)*voltagefactor[i];
 * That is:
 * volts = (25*regVal+133)*factor
 * regVal = (volts/factor-133)/25
 * (These conversions were contributed by Jonathan Teh Soon Yew
 * <j.teh@iname.com>)
 */

static inline u8 IN_TO_REG(long val, int in_num) { /* * To avoid floating point, we multiply constants by 10 (100 for +12V). * Rounding is done (120500 is actually 133000 - 12500). * Remember that val is expressed in 0.001V/bit, which is why we divide * by an additional 10000 (100000 for +12V): 1000 for val and 10 (100) * for the constants. */ if (in_num <= 1) return (u8) clamp_val((val * 21024 - 1205000) / 250000, 0, 255); else if (in_num == 2) return (u8) clamp_val((val * 15737 - 1205000) / 250000, 0, 255); else if (in_num == 3) return (u8) clamp_val((val * 10108 - 1205000) / 250000, 0, 255); else return (u8) clamp_val((val * 41714 - 12050000) / 2500000, 0, 255); }

Contributors

PersonTokensPropCommitsCommitProp
Jan Dittmer9983.19%120.00%
Jean Delvare119.24%120.00%
Guenter Roeck97.56%360.00%
Total119100.00%5100.00%


static inline long IN_FROM_REG(u8 val, int in_num) { /* * To avoid floating point, we multiply constants by 10 (100 for +12V). * We also multiply them by 1000 because we want 0.001V/bit for the * output value. Rounding is done. */ if (in_num <= 1) return (long) ((250000 * val + 1330000 + 21024 / 2) / 21024); else if (in_num == 2) return (long) ((250000 * val + 1330000 + 15737 / 2) / 15737); else if (in_num == 3) return (long) ((250000 * val + 1330000 + 10108 / 2) / 10108); else return (long) ((2500000 * val + 13300000 + 41714 / 2) / 41714); }

Contributors

PersonTokensPropCommitsCommitProp
Jan Dittmer8977.39%125.00%
Jean Delvare2118.26%125.00%
Guenter Roeck54.35%250.00%
Total115100.00%4100.00%

/********* FAN RPM CONVERSIONS ********/ /* * Higher register values = slower fans (the fan's strobe gates a counter). * But this chip saturates back at 0, not at 255 like all the other chips. * So, 0 means 0 RPM */
static inline u8 FAN_TO_REG(long rpm, int div) { if (rpm == 0) return 0; rpm = clamp_val(rpm, 1, 1000000); return clamp_val((1350000 + rpm * div / 2) / (rpm * div), 1, 255); }

Contributors

PersonTokensPropCommitsCommitProp
Jan Dittmer5596.49%150.00%
Guenter Roeck23.51%150.00%
Total57100.00%2100.00%

#define FAN_FROM_REG(val, div) ((val) == 0 ? 0 : (val) == 255 ? 0 : 1350000 / \ ((val) * (div))) /******** TEMP CONVERSIONS (Bob Dougherty) *********/ /* * linear fits from HWMon.cpp (Copyright 1998-2000 Jonathan Teh Soon Yew) * if(temp<169) * return double(temp)*0.427-32.08; * else if(temp>=169 && temp<=202) * return double(temp)*0.582-58.16; * else * return double(temp)*0.924-127.33; * * A fifth-order polynomial fits the unofficial data (provided by Alex van * Kaam <darkside@chello.nl>) a bit better. It also give more reasonable * numbers on my machine (ie. they agree with what my BIOS tells me). * Here's the fifth-order fit to the 8-bit data: * temp = 1.625093e-10*val^5 - 1.001632e-07*val^4 + 2.457653e-05*val^3 - * 2.967619e-03*val^2 + 2.175144e-01*val - 7.090067e+0. * * (2000-10-25- RFD: thanks to Uwe Andersen <uandersen@mayah.com> for * finding my typos in this formula!) * * Alas, none of the elegant function-fit solutions will work because we * aren't allowed to use floating point in the kernel and doing it with * integers doesn't provide enough precision. So we'll do boring old * look-up table stuff. The unofficial data (see below) have effectively * 7-bit resolution (they are rounded to the nearest degree). I'm assuming * that the transfer function of the device is monotonic and smooth, so a * smooth function fit to the data will allow us to get better precision. * I used the 5th-order poly fit described above and solved for * VIA register values 0-255. I *10 before rounding, so we get tenth-degree * precision. (I could have done all 1024 values for our 10-bit readings, * but the function is very linear in the useful range (0-80 deg C), so * we'll just use linear interpolation for 10-bit readings.) So, temp_lut * is the temp at via register values 0-255: */ static const s16 temp_lut[] = { -709, -688, -667, -646, -627, -607, -589, -570, -553, -536, -519, -503, -487, -471, -456, -442, -428, -414, -400, -387, -375, -362, -350, -339, -327, -316, -305, -295, -285, -275, -265, -255, -246, -237, -229, -220, -212, -204, -196, -188, -180, -173, -166, -159, -152, -145, -139, -132, -126, -120, -114, -108, -102, -96, -91, -85, -80, -74, -69, -64, -59, -54, -49, -44, -39, -34, -29, -25, -20, -15, -11, -6, -2, 3, 7, 12, 16, 20, 25, 29, 33, 37, 42, 46, 50, 54, 59, 63, 67, 71, 75, 79, 84, 88, 92, 96, 100, 104, 109, 113, 117, 121, 125, 130, 134, 138, 142, 146, 151, 155, 159, 163, 168, 172, 176, 181, 185, 189, 193, 198, 202, 206, 211, 215, 219, 224, 228, 232, 237, 241, 245, 250, 254, 259, 263, 267, 272, 276, 281, 285, 290, 294, 299, 303, 307, 312, 316, 321, 325, 330, 334, 339, 344, 348, 353, 357, 362, 366, 371, 376, 380, 385, 390, 395, 399, 404, 409, 414, 419, 423, 428, 433, 438, 443, 449, 454, 459, 464, 469, 475, 480, 486, 491, 497, 502, 508, 514, 520, 526, 532, 538, 544, 551, 557, 564, 571, 578, 584, 592, 599, 606, 614, 621, 629, 637, 645, 654, 662, 671, 680, 689, 698, 708, 718, 728, 738, 749, 759, 770, 782, 793, 805, 818, 830, 843, 856, 870, 883, 898, 912, 927, 943, 958, 975, 991, 1008, 1026, 1044, 1062, 1081, 1101, 1121, 1141, 1162, 1184, 1206, 1229, 1252, 1276, 1301, 1326, 1352, 1378, 1406, 1434, 1462 }; /* * the original LUT values from Alex van Kaam <darkside@chello.nl> * (for via register values 12-240): * {-50,-49,-47,-45,-43,-41,-39,-38,-37,-35,-34,-33,-32,-31, * -30,-29,-28,-27,-26,-25,-24,-24,-23,-22,-21,-20,-20,-19,-18,-17,-17,-16,-15, * -15,-14,-14,-13,-12,-12,-11,-11,-10,-9,-9,-8,-8,-7,-7,-6,-6,-5,-5,-4,-4,-3, * -3,-2,-2,-1,-1,0,0,1,1,1,3,3,3,4,4,4,5,5,5,6,6,7,7,8,8,9,9,9,10,10,11,11,12, * 12,12,13,13,13,14,14,15,15,16,16,16,17,17,18,18,19,19,20,20,21,21,21,22,22, * 22,23,23,24,24,25,25,26,26,26,27,27,27,28,28,29,29,30,30,30,31,31,32,32,33, * 33,34,34,35,35,35,36,36,37,37,38,38,39,39,40,40,41,41,42,42,43,43,44,44,45, * 45,46,46,47,48,48,49,49,50,51,51,52,52,53,53,54,55,55,56,57,57,58,59,59,60, * 61,62,62,63,64,65,66,66,67,68,69,70,71,72,73,74,75,76,77,78,79,80,81,83,84, * 85,86,88,89,91,92,94,96,97,99,101,103,105,107,109,110}; * * * Here's the reverse LUT. I got it by doing a 6-th order poly fit (needed * an extra term for a good fit to these inverse data!) and then * solving for each temp value from -50 to 110 (the useable range for * this chip). Here's the fit: * viaRegVal = -1.160370e-10*val^6 +3.193693e-08*val^5 - 1.464447e-06*val^4 * - 2.525453e-04*val^3 + 1.424593e-02*val^2 + 2.148941e+00*val +7.275808e+01) * Note that n=161: */ static const u8 via_lut[] = { 12, 12, 13, 14, 14, 15, 16, 16, 17, 18, 18, 19, 20, 20, 21, 22, 23, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 35, 36, 37, 39, 40, 41, 43, 45, 46, 48, 49, 51, 53, 55, 57, 59, 60, 62, 64, 66, 69, 71, 73, 75, 77, 79, 82, 84, 86, 88, 91, 93, 95, 98, 100, 103, 105, 107, 110, 112, 115, 117, 119, 122, 124, 126, 129, 131, 134, 136, 138, 140, 143, 145, 147, 150, 152, 154, 156, 158, 160, 162, 164, 166, 168, 170, 172, 174, 176, 178, 180, 182, 183, 185, 187, 188, 190, 192, 193, 195, 196, 198, 199, 200, 202, 203, 205, 206, 207, 208, 209, 210, 211, 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, 222, 222, 223, 224, 225, 226, 226, 227, 228, 228, 229, 230, 230, 231, 232, 232, 233, 233, 234, 235, 235, 236, 236, 237, 237, 238, 238, 239, 239, 240 }; /* * Converting temps to (8-bit) hyst and over registers * No interpolation here. * The +50 is because the temps start at -50 */
static inline u8 TEMP_TO_REG(long val) { return via_lut[val <= -50000 ? 0 : val >= 110000 ? 160 : (val < 0 ? val - 500 : val + 500) / 1000 + 50]; }

Contributors

PersonTokensPropCommitsCommitProp
Jan Dittmer3271.11%133.33%
Jean Delvare1226.67%133.33%
Guenter Roeck12.22%133.33%
Total45100.00%3100.00%

/* for 8-bit temperature hyst and over registers */ #define TEMP_FROM_REG(val) ((long)temp_lut[val] * 100) /* for 10-bit temperature readings */
static inline long TEMP_FROM_REG10(u16 val) { u16 eight_bits = val >> 2; u16 two_bits = val & 3; /* no interpolation for these */ if (two_bits == 0 || eight_bits == 255) return TEMP_FROM_REG(eight_bits); /* do some linear interpolation */ return (temp_lut[eight_bits] * (4 - two_bits) + temp_lut[eight_bits + 1] * two_bits) * 25; }

Contributors

PersonTokensPropCommitsCommitProp
Jan Dittmer4668.66%133.33%
Guenter Roeck1116.42%133.33%
Jean Delvare1014.93%133.33%
Total67100.00%3100.00%

#define DIV_FROM_REG(val) (1 << (val)) #define DIV_TO_REG(val) ((val) == 8 ? 3 : (val) == 4 ? 2 : (val) == 1 ? 0 : 1) /* * For each registered chip, we need to keep some data in memory. * The structure is dynamically allocated. */ struct via686a_data { unsigned short addr; const char *name; struct device *hwmon_dev; struct mutex update_lock; char valid; /* !=0 if following fields are valid */ unsigned long last_updated; /* In jiffies */ u8 in[5]; /* Register value */ u8 in_max[5]; /* Register value */ u8 in_min[5]; /* Register value */ u8 fan[2]; /* Register value */ u8 fan_min[2]; /* Register value */ u16 temp[3]; /* Register value 10 bit */ u8 temp_over[3]; /* Register value */ u8 temp_hyst[3]; /* Register value */ u8 fan_div[2]; /* Register encoding, shifted right */ u16 alarms; /* Register encoding, combined */ }; static struct pci_dev *s_bridge; /* pointer to the (only) via686a */ static int via686a_probe(struct platform_device *pdev); static int via686a_remove(struct platform_device *pdev);
static inline int via686a_read_value(struct via686a_data *data, u8 reg) { return inb_p(data->addr + reg); }

Contributors

PersonTokensPropCommitsCommitProp
Jan Dittmer2288.00%266.67%
Jean Delvare312.00%133.33%
Total25100.00%3100.00%


static inline void via686a_write_value(struct via686a_data *data, u8 reg, u8 value) { outb_p(value, data->addr + reg); }

Contributors

PersonTokensPropCommitsCommitProp
Jan Dittmer2689.66%266.67%
Jean Delvare310.34%133.33%
Total29100.00%3100.00%

static struct via686a_data *via686a_update_device(struct device *dev); static void via686a_init_device(struct via686a_data *data); /* following are the sysfs callback functions */ /* 7 voltage sensors */
static ssize_t show_in(struct device *dev, struct device_attribute *da, char *buf) { struct via686a_data *data = via686a_update_device(dev); struct sensor_device_attribute *attr = to_sensor_dev_attr(da); int nr = attr->index; return sprintf(buf, "%ld\n", IN_FROM_REG(data->in[nr], nr)); }

Contributors

PersonTokensPropCommitsCommitProp
Jan Dittmer4364.18%250.00%
Jean Delvare2232.84%125.00%
Mark M. Hoffman22.99%125.00%
Total67100.00%4100.00%


static ssize_t show_in_min(struct device *dev, struct device_attribute *da, char *buf) { struct via686a_data *data = via686a_update_device(dev); struct sensor_device_attribute *attr = to_sensor_dev_attr(da); int nr = attr->index; return sprintf(buf, "%ld\n", IN_FROM_REG(data->in_min[nr], nr)); }

Contributors

PersonTokensPropCommitsCommitProp
Jan Dittmer4364.18%250.00%
Jean Delvare2232.84%125.00%
Mark M. Hoffman22.99%125.00%
Total67100.00%4100.00%


static ssize_t show_in_max(struct device *dev, struct device_attribute *da, char *buf) { struct via686a_data *data = via686a_update_device(dev); struct sensor_device_attribute *attr = to_sensor_dev_attr(da); int nr = attr->index; return sprintf(buf, "%ld\n", IN_FROM_REG(data->in_max[nr], nr)); }

Contributors

PersonTokensPropCommitsCommitProp
Jan Dittmer4364.18%250.00%
Jean Delvare2232.84%125.00%
Mark M. Hoffman22.99%125.00%
Total67100.00%4100.00%


static ssize_t set_in_min(struct device *dev, struct device_attribute *da, const char *buf, size_t count) { struct via686a_data *data = dev_get_drvdata(dev); struct sensor_device_attribute *attr = to_sensor_dev_attr(da); int nr = attr->index; unsigned long val; int err; err = kstrtoul(buf, 10, &val); if (err) return err; mutex_lock(&data->update_lock); data->in_min[nr] = IN_TO_REG(val, nr); via686a_write_value(data, VIA686A_REG_IN_MIN(nr), data->in_min[nr]); mutex_unlock(&data->update_lock); return count; }

Contributors

PersonTokensPropCommitsCommitProp
Jan Dittmer6752.76%225.00%
Jean Delvare3930.71%337.50%
Guenter Roeck1814.17%112.50%
Ingo Molnar21.57%112.50%
Greg Kroah-Hartman10.79%112.50%
Total127100.00%8100.00%


static ssize_t set_in_max(struct device *dev, struct device_attribute *da, const char *buf, size_t count) { struct via686a_data *data = dev_get_drvdata(dev); struct sensor_device_attribute *attr = to_sensor_dev_attr(da); int nr = attr->index; unsigned long val; int err; err = kstrtoul(buf, 10, &val); if (err) return err; mutex_lock(&data->update_lock); data->in_max[nr] = IN_TO_REG(val, nr); via686a_write_value(data, VIA686A_REG_IN_MAX(nr), data->in_max[nr]); mutex_unlock(&data->update_lock); return count; }

Contributors

PersonTokensPropCommitsCommitProp
Jan Dittmer6853.54%228.57%
Jean Delvare3930.71%342.86%
Guenter Roeck1814.17%114.29%
Ingo Molnar21.57%114.29%
Total127100.00%7100.00%

#define show_in_offset(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); show_in_offset(0); show_in_offset(1); show_in_offset(2); show_in_offset(3); show_in_offset(4); /* 3 temperatures */
static ssize_t show_temp(struct device *dev, struct device_attribute *da, char *buf) { struct via686a_data *data = via686a_update_device(dev); struct sensor_device_attribute *attr = to_sensor_dev_attr(da); int nr = attr->index; return sprintf(buf, "%ld\n", TEMP_FROM_REG10(data->temp[nr])); }

Contributors

PersonTokensPropCommitsCommitProp
Jan Dittmer4163.08%250.00%
Jean Delvare2233.85%125.00%
Mark M. Hoffman23.08%125.00%
Total65100.00%4100.00%


static ssize_t show_temp_over(struct device *dev, struct device_attribute *da, char *buf) { struct via686a_data *data = via686a_update_device(dev); struct sensor_device_attribute *attr = to_sensor_dev_attr(da); int nr = attr->index; return sprintf(buf, "%ld\n", TEMP_FROM_REG(data->temp_over[nr])); }

Contributors

PersonTokensPropCommitsCommitProp
Jan Dittmer4061.54%240.00%
Jean Delvare2335.38%240.00%
Mark M. Hoffman23.08%120.00%
Total65100.00%5100.00%


static ssize_t show_temp_hyst(struct device *dev, struct device_attribute *da, char *buf) { struct via686a_data *data = via686a_update_device(dev); struct sensor_device_attribute *attr = to_sensor_dev_attr(da); int nr = attr->index; return sprintf(buf, "%ld\n", TEMP_FROM_REG(data->temp_hyst[nr])); }

Contributors

PersonTokensPropCommitsCommitProp
Jan Dittmer4061.54%240.00%
Jean Delvare2335.38%240.00%
Mark M. Hoffman23.08%120.00%
Total65100.00%5100.00%


static ssize_t set_temp_over(struct device *dev, struct device_attribute *da, const char *buf, size_t count) { struct via686a_data *data = dev_get_drvdata(dev); struct sensor_device_attribute *attr = to_sensor_dev_attr(da); int nr = attr->index; long val; int err; err = kstrtol(buf, 10, &val); if (err) return err; mutex_lock(&data->update_lock); data->temp_over[nr] = TEMP_TO_REG(val); via686a_write_value(data, VIA686A_REG_TEMP_OVER[nr], data->temp_over[nr]); mutex_unlock(&data->update_lock); return count; }

Contributors

PersonTokensPropCommitsCommitProp
Jan Dittmer6149.19%222.22%
Jean Delvare4233.87%555.56%
Guenter Roeck1915.32%111.11%
Ingo Molnar21.61%111.11%
Total124100.00%9100.00%


static ssize_t set_temp_hyst(struct device *dev, struct device_attribute *da, const char *buf, size_t count) { struct via686a_data *data = dev_get_drvdata(dev); struct sensor_device_attribute *attr = to_sensor_dev_attr(da); int nr = attr->index; long val; int err; err = kstrtol(buf, 10, &val); if (err) return err; mutex_lock(&data->update_lock); data->temp_hyst[nr] = TEMP_TO_REG(val); via686a_write_value(data, VIA686A_REG_TEMP_HYST[nr], data->temp_hyst[nr]); mutex_unlock(&data->update_lock); return count; }

Contributors

PersonTokensPropCommitsCommitProp
Jan Dittmer6149.19%222.22%
Jean Delvare4233.87%555.56%
Guenter Roeck1915.32%111.11%
Ingo Molnar21.61%111.11%
Total124100.00%9100.00%

#define show_temp_offset(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_over, set_temp_over, offset - 1); \ static SENSOR_DEVICE_ATTR(temp##offset##_max_hyst, S_IRUGO | S_IWUSR, \ show_temp_hyst, set_temp_hyst, offset - 1); show_temp_offset(1); show_temp_offset(2); show_temp_offset(3); /* 2 Fans */
static ssize_t show_fan(struct device *dev, struct device_attribute *da, char *buf) { struct via686a_data *data = via686a_update_device(dev); struct sensor_device_attribute *attr = to_sensor_dev_attr(da); int nr = attr->index; return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[nr], DIV_FROM_REG(data->fan_div[nr]))); }

Contributors

PersonTokensPropCommitsCommitProp
Jan Dittmer5168.00%250.00%
Jean Delvare2229.33%125.00%
Mark M. Hoffman22.67%125.00%
Total75100.00%4100.00%


static ssize_t show_fan_min(struct device *dev, struct device_attribute *da, char *buf) { struct via686a_data *data = via686a_update_device(dev); struct sensor_device_attribute *attr = to_sensor_dev_attr(da); int nr = attr->index; return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[nr], DIV_FROM_REG(data->fan_div[nr]))); }

Contributors

PersonTokensPropCommitsCommitProp
Jan Dittmer5168.00%250.00%
Jean Delvare2229.33%125.00%
Mark M. Hoffman22.67%125.00%
Total75100.00%4100.00%


static ssize_t show_fan_div(struct device *dev, struct device_attribute *da, char *buf) { struct via686a_data *data = via686a_update_device(dev); struct sensor_device_attribute *attr = to_sensor_dev_attr(da); int nr = attr->index; return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr])); }

Contributors

PersonTokensPropCommitsCommitProp
Jan Dittmer4163.08%250.00%
Jean Delvare2233.85%125.00%
Mark M. Hoffman23.08%125.00%
Total65100.00%4100.00%


static ssize_t set_fan_min(struct device *dev, struct device_attribute *da, const char *buf, size_t count) { struct via686a_data *data = dev_get_drvdata(dev); struct sensor_device_attribute *attr = to_sensor_dev_attr(da); int nr = attr->index; 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])); via686a_write_value(data, VIA686A_REG_FAN_MIN(nr+1), data->fan_min[nr]); mutex_unlock(&data->update_lock); return count; }

Contributors

PersonTokensPropCommitsCommitProp
Jan Dittmer7655.47%228.57%
Jean Delvare3928.47%342.86%
Guenter Roeck2014.60%114.29%
Ingo Molnar21.46%114.29%
Total137100.00%7100.00%


static ssize_t set_fan_div(struct device *dev, struct device_attribute *da, const char *buf, size_t count) { struct via686a_data *data = dev_get_drvdata(dev); struct sensor_device_attribute *attr = to_sensor_dev_attr(da); int nr = attr->index; int old; unsigned long val; int err; err = kstrtoul(buf, 10, &val); if (err) return err; mutex_lock(&data->update_lock); old = via686a_read_value(data, VIA686A_REG_FANDIV); data->fan_div[nr] = DIV_TO_REG(val); old = (old & 0x0f) | (data->fan_div[1] << 6) | (data->fan_div[0] << 4); via686a_write_value(data, VIA686A_REG_FANDIV, old); mutex_unlock(&data->update_lock); return count; }

Contributors

PersonTokensPropCommitsCommitProp
Jan Dittmer9257.86%116.67%
Jean Delvare4327.04%350.00%
Guenter Roeck2213.84%116.67%
Ingo Molnar21.26%116.67%
Total159100.00%6100.00%

#define show_fan_offset(offset) \ static SENSOR_DEVICE_ATTR(fan##offset##_input, S_IRUGO, \ show_fan, NULL, offset - 1); \ static SENSOR_DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \ show_fan_min, set_fan_min, offset - 1); \ static SENSOR_DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR, \ show_fan_div, set_fan_div, offset - 1); show_fan_offset(1); show_fan_offset(2); /* Alarms */
static ssize_t alarms_show(struct device *dev, struct device_attribute *attr, char *buf) { struct via686a_data *data = via686a_update_device(dev); return sprintf(buf, "%u\n", data->alarms); }

Contributors

PersonTokensPropCommitsCommitProp
Jan Dittmer3378.57%120.00%
Yani Ioannou511.90%120.00%
Mark M. Hoffman24.76%120.00%
Julia Lawall12.38%120.00%
Jean Delvare12.38%120.00%
Total42100.00%5100.00%

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 via686a_data *data = via686a_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(in0_alarm, S_IRUGO, show_alarm, NULL, 0); static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 1); static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 2); 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(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, 15); 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 via686a_data *data = dev_get_drvdata(dev); return sprintf(buf, "%s\n", data->name); }

Contributors

PersonTokensPropCommitsCommitProp
Jean Delvare4197.62%150.00%
Julia Lawall12.38%150.00%
Total42100.00%2100.00%

static DEVICE_ATTR_RO(name); static struct attribute *via686a_attributes[] = { &sensor_dev_attr_in0_input.dev_attr.attr, &sensor_dev_attr_in1_input.dev_attr.attr, &sensor_dev_attr_in2_input.dev_attr.attr, &sensor_dev_attr_in3_input.dev_attr.attr, &sensor_dev_attr_in4_input.dev_attr.attr, &sensor_dev_attr_in0_min.dev_attr.attr, &sensor_dev_attr_in1_min.dev_attr.attr, &sensor_dev_attr_in2_min.dev_attr.attr, &sensor_dev_attr_in3_min.dev_attr.attr, &sensor_dev_attr_in4_min.dev_attr.attr, &sensor_dev_attr_in0_max.dev_attr.attr, &sensor_dev_attr_in1_max.dev_attr.attr, &sensor_dev_attr_in2_max.dev_attr.attr, &sensor_dev_attr_in3_max.dev_attr.attr, &sensor_dev_attr_in4_max.dev_attr.attr, &sensor_dev_attr_in0_alarm.dev_attr.attr, &sensor_dev_attr_in1_alarm.dev_attr.attr, &sensor_dev_attr_in2_alarm.dev_attr.attr, &sensor_dev_attr_in3_alarm.dev_attr.attr, &sensor_dev_attr_in4_alarm.dev_attr.attr, &sensor_dev_attr_temp1_input.dev_attr.attr, &sensor_dev_attr_temp2_input.dev_attr.attr, &sensor_dev_attr_temp3_input.dev_attr.attr, &sensor_dev_attr_temp1_max.dev_attr.attr, &sensor_dev_attr_temp2_max.dev_attr.attr, &sensor_dev_attr_temp3_max.dev_attr.attr, &sensor_dev_attr_temp1_max_hyst.dev_attr.attr, &sensor_dev_attr_temp2_max_hyst.dev_attr.attr, &sensor_dev_attr_temp3_max_hyst.dev_attr.attr, &sensor_dev_attr_temp1_alarm.dev_attr.attr, &sensor_dev_attr_temp2_alarm.dev_attr.attr, &sensor_dev_attr_temp3_alarm.dev_attr.attr, &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 via686a_group = { .attrs = via686a_attributes, }; static struct platform_driver via686a_driver = { .driver = { .name = "via686a", }, .probe = via686a_probe, .remove = via686a_remove, }; /* This is called when the module is loaded */
static int via686a_probe(struct platform_device *pdev) { struct via686a_data *data; struct resource *res; int err; /* Reserve the ISA region */ res = platform_get_resource(pdev, IORESOURCE_IO, 0); if (!devm_request_region(&pdev->dev, res->start, VIA686A_EXTENT, via686a_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 via686a_data), GFP_KERNEL); if (!data) return -ENOMEM; platform_set_drvdata(pdev, data); data->addr = res->start; data->name = "via686a"; mutex_init(&data->update_lock); /* Initialize the VIA686A chip */ via686a_init_device(data); /* Register sysfs hooks */ err = sysfs_create_group(&pdev->dev.kobj, &via686a_group); if (err) return err; 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: sysfs_remove_group(&pdev->dev.kobj, &via686a_group); return err; }

Contributors

PersonTokensPropCommitsCommitProp
Jean Delvare9641.38%330.00%
Jan Dittmer7632.76%220.00%
Mark M. Hoffman3012.93%110.00%
Guenter Roeck2611.21%220.00%
Tony Jones31.29%110.00%
Ingo Molnar10.43%110.00%
Total232100.00%10100.00%


static int via686a_remove(struct platform_device *pdev) { struct via686a_data *data = platform_get_drvdata(pdev); hwmon_device_unregister(data->hwmon_dev); sysfs_remove_group(&pdev->dev.kobj, &via686a_group); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Jean Delvare1840.91%233.33%
Mark M. Hoffman1431.82%116.67%
Jan Dittmer1125.00%233.33%
Tony Jones12.27%116.67%
Total44100.00%6100.00%


static void via686a_update_fan_div(struct via686a_data *data) { int reg = via686a_read_value(data, VIA686A_REG_FANDIV); data->fan_div[0] = (reg >> 4) & 0x03; data->fan_div[1] = reg >> 6; }

Contributors

PersonTokensPropCommitsCommitProp
Jean Delvare47100.00%1100.00%
Total47100.00%1100.00%


static void via686a_init_device(struct via686a_data *data) { u8 reg; /* Start monitoring */ reg = via686a_read_value(data, VIA686A_REG_CONFIG); via686a_write_value(data, VIA686A_REG_CONFIG, (reg | 0x01) & 0x7F); /* Configure temp interrupt mode for continuous-interrupt operation */ reg = via686a_read_value(data, VIA686A_REG_TEMP_MODE); via686a_write_value(data, VIA686A_REG_TEMP_MODE, (reg & ~VIA686A_TEMP_MODE_MASK) | VIA686A_TEMP_MODE_CONTINUOUS); /* Pre-read fan clock divisor values */ via686a_update_fan_div(data); }

Contributors

PersonTokensPropCommitsCommitProp
Jean Delvare3752.11%457.14%
Jan Dittmer3346.48%228.57%
Greg Kroah-Hartman11.41%114.29%
Total71100.00%7100.00%


static struct via686a_data *via686a_update_device(struct device *dev) { struct via686a_data *data = dev_get_drvdata(dev); int i; mutex_lock(&data->update_lock); if (time_after(jiffies, data->last_updated + HZ + HZ / 2) || !data->valid) { for (i = 0; i <= 4; i++) { data->in[i] = via686a_read_value(data, VIA686A_REG_IN(i)); data->in_min[i] = via686a_read_value(data, VIA686A_REG_IN_MIN (i)); data->in_max[i] = via686a_read_value(data, VIA686A_REG_IN_MAX(i)); } for (i = 1; i <= 2; i++) { data->fan[i - 1] = via686a_read_value(data, VIA686A_REG_FAN(i)); data->fan_min[i - 1] = via686a_read_value(data, VIA686A_REG_FAN_MIN(i)); } for (i = 0; i <= 2; i++) { data->temp[i] = via686a_read_value(data, VIA686A_REG_TEMP[i]) << 2; data->temp_over[i] = via686a_read_value(data, VIA686A_REG_TEMP_OVER[i]); data->temp_hyst[i] = via686a_read_value(data, VIA686A_REG_TEMP_HYST[i]); } /* * add in lower 2 bits * temp1 uses bits 7-6 of VIA686A_REG_TEMP_LOW1 * temp2 uses bits 5-4 of VIA686A_REG_TEMP_LOW23 * temp3 uses bits 7-6 of VIA686A_REG_TEMP_LOW23 */ data->temp[0] |= (via686a_read_value(data, VIA686A_REG_TEMP_LOW1) & 0xc0) >> 6; data->temp[1] |= (via686a_read_value(data, VIA686A_REG_TEMP_LOW23) & 0x30) >> 4; data->temp[2] |= (via686a_read_value(data, VIA686A_REG_TEMP_LOW23) & 0xc0) >> 6; via686a_update_fan_div(data); data->alarms = via686a_read_value(data, VIA686A_REG_ALARM1) | (via686a_read_value(data, VIA686A_REG_ALARM2) << 8); data->last_updated = jiffies; data->valid = 1; } mutex_unlock(&data->update_lock); return data; }

Contributors

PersonTokensPropCommitsCommitProp
Jan Dittmer31488.20%220.00%
Jean Delvare236.46%330.00%
Mark M. Hoffman92.53%110.00%
Alexey Dobriyan51.40%110.00%
Greg Kroah-Hartman20.56%110.00%
Ingo Molnar20.56%110.00%
Guenter Roeck10.28%110.00%
Total356100.00%10100.00%

static const struct pci_device_id via686a_pci_ids[] = { { PCI_DEVICE(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C686_4) }, { } }; MODULE_DEVICE_TABLE(pci, via686a_pci_ids);
static int via686a_device_add(unsigned short address) { struct resource res = { .start = address, .end = address + VIA686A_EXTENT - 1, .name = "via686a", .flags = IORESOURCE_IO, }; int err; err = acpi_check_resource_conflict(&res); if (err) goto exit; pdev = platform_device_alloc("via686a", 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
Jean Delvare14796.08%266.67%
Joe Perches63.92%133.33%
Total153100.00%3100.00%


static int via686a_pci_probe(struct pci_dev *dev, const struct pci_device_id *id) { u16 address, val; if (force_addr) { address = force_addr & ~(VIA686A_EXTENT - 1); dev_warn(&dev->dev, "Forcing ISA address 0x%x\n", address); if (PCIBIOS_SUCCESSFUL != pci_write_config_word(dev, VIA686A_BASE_REG, address | 1)) return -ENODEV; } if (PCIBIOS_SUCCESSFUL != pci_read_config_word(dev, VIA686A_BASE_REG, &val)) return -ENODEV; address = val & ~(VIA686A_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, VIA686A_ENABLE_REG, &val)) return -ENODEV; if (!(val & 0x0001)) { if (!force_addr) { dev_warn(&dev->dev, "Sensors disabled, enable with force_addr=0x%x\n", address); return -ENODEV; } dev_warn(&dev->dev, "Enabling sensors\n"); if (PCIBIOS_SUCCESSFUL != pci_write_config_word(dev, VIA686A_ENABLE_REG, val | 0x0001)) return -ENODEV; } if (platform_driver_register(&via686a_driver)) goto exit; /* Sets global pdev as a side effect */ if (via686a_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. */ s_bridge = pci_dev_get(dev); return -ENODEV; exit_unregister: platform_driver_unregister(&via686a_driver); exit: return -ENODEV; }

Contributors

PersonTokensPropCommitsCommitProp
Jean Delvare17168.40%350.00%
Jan Dittmer7630.40%116.67%
Guenter Roeck31.20%233.33%
Total250100.00%6100.00%

static struct pci_driver via686a_pci_driver = { .name = "via686a", .id_table = via686a_pci_ids, .probe = via686a_pci_probe, };
static int __init sm_via686a_init(void) { return pci_register_driver(&via686a_pci_driver); }

Contributors

PersonTokensPropCommitsCommitProp
Jan Dittmer1593.75%150.00%
Greg Kroah-Hartman16.25%150.00%
Total16100.00%2100.00%


static void __exit sm_via686a_exit(void) { pci_unregister_driver(&via686a_pci_driver); if (s_bridge != NULL) { platform_device_unregister(pdev); platform_driver_unregister(&via686a_driver); pci_dev_put(s_bridge); s_bridge = NULL; } }

Contributors

PersonTokensPropCommitsCommitProp
Jean Delvare2865.12%266.67%
Jan Dittmer1534.88%133.33%
Total43100.00%3100.00%

MODULE_AUTHOR("Kyösti Mälkki <kmalkki@cc.hut.fi>, " "Mark Studebaker <mdsxyz123@yahoo.com> " "and Bob Dougherty <bobd@stanford.edu>"); MODULE_DESCRIPTION("VIA 686A Sensor device"); MODULE_LICENSE("GPL"); module_init(sm_via686a_init); module_exit(sm_via686a_exit);

Overall Contributors

PersonTokensPropCommitsCommitProp
Jan Dittmer313660.40%24.44%
Jean Delvare168432.43%2248.89%
Guenter Roeck1913.68%511.11%
Mark M. Hoffman881.69%24.44%
Greg Kroah-Hartman250.48%48.89%
Ingo Molnar190.37%12.22%
Joe Perches130.25%12.22%
Alexey Dobriyan80.15%12.22%
Jingoo Han60.12%12.22%
Tony Jones60.12%12.22%
Laurent Riffard50.10%12.22%
Yani Ioannou50.10%12.22%
Julia Lawall40.08%12.22%
H Hartley Sweeten10.02%12.22%
Jan Engelhardt10.02%12.22%
Total5192100.00%45100.00%
Directory: drivers/hwmon
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