From 2c3c1048746a4622d8c89a29670120dc8fab93c4 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 20:49:45 +0200 Subject: Adding upstream version 6.1.76. Signed-off-by: Daniel Baumann --- drivers/hwmon/via686a.c | 945 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 945 insertions(+) create mode 100644 drivers/hwmon/via686a.c (limited to 'drivers/hwmon/via686a.c') diff --git a/drivers/hwmon/via686a.c b/drivers/hwmon/via686a.c new file mode 100644 index 000000000..37d737489 --- /dev/null +++ b/drivers/hwmon/via686a.c @@ -0,0 +1,945 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * via686a.c - Part of lm_sensors, Linux kernel modules + * for hardware monitoring + * + * Copyright (c) 1998 - 2002 Frodo Looijaard , + * Kyösti Mälkki , + * Mark Studebaker , + * and Bob Dougherty + * + * (Some conversion-factor data were contributed by Jonathan Teh Soon Yew + * and Alex van Kaam .) + */ + +/* + * 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 +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define DRIVER_NAME "via686a" + +/* + * 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 + * ) + */ +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); +} + +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); +} + +/********* 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); +} + +#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 ) 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 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 + * (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]; +} + +/* 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; +} + +#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; + bool valid; /* true 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 inline int via686a_read_value(struct via686a_data *data, u8 reg) +{ + return inb_p(data->addr + reg); +} + +static inline void via686a_write_value(struct via686a_data *data, u8 reg, + u8 value) +{ + outb_p(value, data->addr + reg); +} + +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; +} + +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 = true; + } + + mutex_unlock(&data->update_lock); + + return data; +} + +/* following are the sysfs callback functions */ + +/* 7 voltage sensors */ +static ssize_t in_show(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)); +} + +static ssize_t in_min_show(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)); +} + +static ssize_t in_max_show(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)); +} + +static ssize_t in_min_store(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; +} +static ssize_t in_max_store(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; +} + +static SENSOR_DEVICE_ATTR_RO(in0_input, in, 0); +static SENSOR_DEVICE_ATTR_RW(in0_min, in_min, 0); +static SENSOR_DEVICE_ATTR_RW(in0_max, in_max, 0); +static SENSOR_DEVICE_ATTR_RO(in1_input, in, 1); +static SENSOR_DEVICE_ATTR_RW(in1_min, in_min, 1); +static SENSOR_DEVICE_ATTR_RW(in1_max, in_max, 1); +static SENSOR_DEVICE_ATTR_RO(in2_input, in, 2); +static SENSOR_DEVICE_ATTR_RW(in2_min, in_min, 2); +static SENSOR_DEVICE_ATTR_RW(in2_max, in_max, 2); +static SENSOR_DEVICE_ATTR_RO(in3_input, in, 3); +static SENSOR_DEVICE_ATTR_RW(in3_min, in_min, 3); +static SENSOR_DEVICE_ATTR_RW(in3_max, in_max, 3); +static SENSOR_DEVICE_ATTR_RO(in4_input, in, 4); +static SENSOR_DEVICE_ATTR_RW(in4_min, in_min, 4); +static SENSOR_DEVICE_ATTR_RW(in4_max, in_max, 4); + +/* 3 temperatures */ +static ssize_t temp_show(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])); +} +static ssize_t temp_over_show(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])); +} +static ssize_t temp_hyst_show(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])); +} +static ssize_t temp_over_store(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; +} +static ssize_t temp_hyst_store(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; +} + +static SENSOR_DEVICE_ATTR_RO(temp1_input, temp, 0); +static SENSOR_DEVICE_ATTR_RW(temp1_max, temp_over, 0); +static SENSOR_DEVICE_ATTR_RW(temp1_max_hyst, temp_hyst, 0); +static SENSOR_DEVICE_ATTR_RO(temp2_input, temp, 1); +static SENSOR_DEVICE_ATTR_RW(temp2_max, temp_over, 1); +static SENSOR_DEVICE_ATTR_RW(temp2_max_hyst, temp_hyst, 1); +static SENSOR_DEVICE_ATTR_RO(temp3_input, temp, 2); +static SENSOR_DEVICE_ATTR_RW(temp3_max, temp_over, 2); +static SENSOR_DEVICE_ATTR_RW(temp3_max_hyst, temp_hyst, 2); + +/* 2 Fans */ +static ssize_t fan_show(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]))); +} +static ssize_t fan_min_show(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]))); +} +static ssize_t fan_div_show(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])); +} +static ssize_t fan_min_store(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; +} +static ssize_t fan_div_store(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; +} + +static SENSOR_DEVICE_ATTR_RO(fan1_input, fan, 0); +static SENSOR_DEVICE_ATTR_RW(fan1_min, fan_min, 0); +static SENSOR_DEVICE_ATTR_RW(fan1_div, fan_div, 0); +static SENSOR_DEVICE_ATTR_RO(fan2_input, fan, 1); +static SENSOR_DEVICE_ATTR_RW(fan2_min, fan_min, 1); +static SENSOR_DEVICE_ATTR_RW(fan2_div, fan_div, 1); + +/* 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); +} + +static DEVICE_ATTR_RO(alarms); + +static ssize_t alarm_show(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); +} +static SENSOR_DEVICE_ATTR_RO(in0_alarm, alarm, 0); +static SENSOR_DEVICE_ATTR_RO(in1_alarm, alarm, 1); +static SENSOR_DEVICE_ATTR_RO(in2_alarm, alarm, 2); +static SENSOR_DEVICE_ATTR_RO(in3_alarm, alarm, 3); +static SENSOR_DEVICE_ATTR_RO(in4_alarm, alarm, 8); +static SENSOR_DEVICE_ATTR_RO(temp1_alarm, alarm, 4); +static SENSOR_DEVICE_ATTR_RO(temp2_alarm, alarm, 11); +static SENSOR_DEVICE_ATTR_RO(temp3_alarm, alarm, 15); +static SENSOR_DEVICE_ATTR_RO(fan1_alarm, alarm, 6); +static SENSOR_DEVICE_ATTR_RO(fan2_alarm, alarm, 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); +} +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 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); +} + +/* 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, + 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 = DRIVER_NAME; + 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; +} + +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; +} + +static struct platform_driver via686a_driver = { + .driver = { + .name = DRIVER_NAME, + }, + .probe = via686a_probe, + .remove = via686a_remove, +}; + +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 = DRIVER_NAME, + .flags = IORESOURCE_IO, + }; + int err; + + err = acpi_check_resource_conflict(&res); + if (err) + goto exit; + + pdev = platform_device_alloc(DRIVER_NAME, 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; +} + +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; +} + +static struct pci_driver via686a_pci_driver = { + .name = DRIVER_NAME, + .id_table = via686a_pci_ids, + .probe = via686a_pci_probe, +}; + +static int __init sm_via686a_init(void) +{ + return pci_register_driver(&via686a_pci_driver); +} + +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; + } +} + +MODULE_AUTHOR("Kyösti Mälkki , " + "Mark Studebaker " + "and Bob Dougherty "); +MODULE_DESCRIPTION("VIA 686A Sensor device"); +MODULE_LICENSE("GPL"); + +module_init(sm_via686a_init); +module_exit(sm_via686a_exit); -- cgit v1.2.3