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-rw-r--r--drivers/hwmon/via686a.c875
1 files changed, 875 insertions, 0 deletions
diff --git a/drivers/hwmon/via686a.c b/drivers/hwmon/via686a.c
new file mode 100644
index 000000000000..164d47948390
--- /dev/null
+++ b/drivers/hwmon/via686a.c
@@ -0,0 +1,875 @@
+/*
+ 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.
+*/
+
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/pci.h>
+#include <linux/jiffies.h>
+#include <linux/i2c.h>
+#include <linux/i2c-sensor.h>
+#include <linux/init.h>
+#include <asm/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 = 0;
+module_param(force_addr, ushort, 0);
+MODULE_PARM_DESC(force_addr,
+ "Initialize the base address of the sensors");
+
+/* Addresses to scan.
+ Note that we can't determine the ISA address until we have initialized
+ our module */
+static unsigned short normal_i2c[] = { I2C_CLIENT_END };
+static unsigned int normal_isa[] = { 0x0000, I2C_CLIENT_ISA_END };
+
+/* Insmod parameters */
+SENSORS_INSMOD_1(via686a);
+
+/*
+ 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 inNum)
+{
+ /* 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 (inNum <= 1)
+ return (u8)
+ SENSORS_LIMIT((val * 21024 - 1205000) / 250000, 0, 255);
+ else if (inNum == 2)
+ return (u8)
+ SENSORS_LIMIT((val * 15737 - 1205000) / 250000, 0, 255);
+ else if (inNum == 3)
+ return (u8)
+ SENSORS_LIMIT((val * 10108 - 1205000) / 250000, 0, 255);
+ else
+ return (u8)
+ SENSORS_LIMIT((val * 41714 - 12050000) / 2500000, 0, 255);
+}
+
+static inline long IN_FROM_REG(u8 val, int inNum)
+{
+ /* 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 (inNum <= 1)
+ return (long) ((250000 * val + 1330000 + 21024 / 2) / 21024);
+ else if (inNum == 2)
+ return (long) ((250000 * val + 1330000 + 15737 / 2) / 15737);
+ else if (inNum == 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 = SENSORS_LIMIT(rpm, 1, 1000000);
+ return SENSORS_LIMIT((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 <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, tempLUT
+ is the temp at via register values 0-255: */
+static const long tempLUT[] =
+{ -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 viaLUT[] =
+{ 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 viaLUT[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) (tempLUT[(val)] * 100)
+
+/* for 10-bit temperature readings */
+static inline long TEMP_FROM_REG10(u16 val)
+{
+ u16 eightBits = val >> 2;
+ u16 twoBits = val & 3;
+
+ /* no interpolation for these */
+ if (twoBits == 0 || eightBits == 255)
+ return TEMP_FROM_REG(eightBits);
+
+ /* do some linear interpolation */
+ return (tempLUT[eightBits] * (4 - twoBits) +
+ tempLUT[eightBits + 1] * twoBits) * 25;
+}
+
+#define DIV_FROM_REG(val) (1 << (val))
+#define DIV_TO_REG(val) ((val)==8?3:(val)==4?2:(val)==1?0:1)
+
+/* For the VIA686A, we need to keep some data in memory.
+ The structure is dynamically allocated, at the same time when a new
+ via686a client is allocated. */
+struct via686a_data {
+ struct i2c_client client;
+ struct semaphore 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_attach_adapter(struct i2c_adapter *adapter);
+static int via686a_detect(struct i2c_adapter *adapter, int address, int kind);
+static int via686a_detach_client(struct i2c_client *client);
+
+static inline int via686a_read_value(struct i2c_client *client, u8 reg)
+{
+ return (inb_p(client->addr + reg));
+}
+
+static inline void via686a_write_value(struct i2c_client *client, u8 reg,
+ u8 value)
+{
+ outb_p(value, client->addr + reg);
+}
+
+static struct via686a_data *via686a_update_device(struct device *dev);
+static void via686a_init_client(struct i2c_client *client);
+
+/* following are the sysfs callback functions */
+
+/* 7 voltage sensors */
+static ssize_t show_in(struct device *dev, char *buf, int nr) {
+ struct via686a_data *data = via686a_update_device(dev);
+ return sprintf(buf, "%ld\n", IN_FROM_REG(data->in[nr], nr));
+}
+
+static ssize_t show_in_min(struct device *dev, char *buf, int nr) {
+ struct via686a_data *data = via686a_update_device(dev);
+ return sprintf(buf, "%ld\n", IN_FROM_REG(data->in_min[nr], nr));
+}
+
+static ssize_t show_in_max(struct device *dev, char *buf, int nr) {
+ struct via686a_data *data = via686a_update_device(dev);
+ return sprintf(buf, "%ld\n", IN_FROM_REG(data->in_max[nr], nr));
+}
+
+static ssize_t set_in_min(struct device *dev, const char *buf,
+ size_t count, int nr) {
+ struct i2c_client *client = to_i2c_client(dev);
+ struct via686a_data *data = i2c_get_clientdata(client);
+ unsigned long val = simple_strtoul(buf, NULL, 10);
+
+ down(&data->update_lock);
+ data->in_min[nr] = IN_TO_REG(val, nr);
+ via686a_write_value(client, VIA686A_REG_IN_MIN(nr),
+ data->in_min[nr]);
+ up(&data->update_lock);
+ return count;
+}
+static ssize_t set_in_max(struct device *dev, const char *buf,
+ size_t count, int nr) {
+ struct i2c_client *client = to_i2c_client(dev);
+ struct via686a_data *data = i2c_get_clientdata(client);
+ unsigned long val = simple_strtoul(buf, NULL, 10);
+
+ down(&data->update_lock);
+ data->in_max[nr] = IN_TO_REG(val, nr);
+ via686a_write_value(client, VIA686A_REG_IN_MAX(nr),
+ data->in_max[nr]);
+ up(&data->update_lock);
+ return count;
+}
+#define show_in_offset(offset) \
+static ssize_t \
+ show_in##offset (struct device *dev, struct device_attribute *attr, char *buf) \
+{ \
+ return show_in(dev, buf, offset); \
+} \
+static ssize_t \
+ show_in##offset##_min (struct device *dev, struct device_attribute *attr, char *buf) \
+{ \
+ return show_in_min(dev, buf, offset); \
+} \
+static ssize_t \
+ show_in##offset##_max (struct device *dev, struct device_attribute *attr, char *buf) \
+{ \
+ return show_in_max(dev, buf, offset); \
+} \
+static ssize_t set_in##offset##_min (struct device *dev, struct device_attribute *attr, \
+ const char *buf, size_t count) \
+{ \
+ return set_in_min(dev, buf, count, offset); \
+} \
+static ssize_t set_in##offset##_max (struct device *dev, struct device_attribute *attr, \
+ const char *buf, size_t count) \
+{ \
+ return set_in_max(dev, buf, count, offset); \
+} \
+static DEVICE_ATTR(in##offset##_input, S_IRUGO, show_in##offset, NULL);\
+static DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \
+ show_in##offset##_min, set_in##offset##_min); \
+static DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \
+ show_in##offset##_max, set_in##offset##_max);
+
+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, char *buf, int nr) {
+ struct via686a_data *data = via686a_update_device(dev);
+ return sprintf(buf, "%ld\n", TEMP_FROM_REG10(data->temp[nr]));
+}
+static ssize_t show_temp_over(struct device *dev, char *buf, int nr) {
+ struct via686a_data *data = via686a_update_device(dev);
+ return sprintf(buf, "%ld\n", TEMP_FROM_REG(data->temp_over[nr]));
+}
+static ssize_t show_temp_hyst(struct device *dev, char *buf, int nr) {
+ struct via686a_data *data = via686a_update_device(dev);
+ return sprintf(buf, "%ld\n", TEMP_FROM_REG(data->temp_hyst[nr]));
+}
+static ssize_t set_temp_over(struct device *dev, const char *buf,
+ size_t count, int nr) {
+ struct i2c_client *client = to_i2c_client(dev);
+ struct via686a_data *data = i2c_get_clientdata(client);
+ int val = simple_strtol(buf, NULL, 10);
+
+ down(&data->update_lock);
+ data->temp_over[nr] = TEMP_TO_REG(val);
+ via686a_write_value(client, VIA686A_REG_TEMP_OVER[nr],
+ data->temp_over[nr]);
+ up(&data->update_lock);
+ return count;
+}
+static ssize_t set_temp_hyst(struct device *dev, const char *buf,
+ size_t count, int nr) {
+ struct i2c_client *client = to_i2c_client(dev);
+ struct via686a_data *data = i2c_get_clientdata(client);
+ int val = simple_strtol(buf, NULL, 10);
+
+ down(&data->update_lock);
+ data->temp_hyst[nr] = TEMP_TO_REG(val);
+ via686a_write_value(client, VIA686A_REG_TEMP_HYST[nr],
+ data->temp_hyst[nr]);
+ up(&data->update_lock);
+ return count;
+}
+#define show_temp_offset(offset) \
+static ssize_t show_temp_##offset (struct device *dev, struct device_attribute *attr, char *buf) \
+{ \
+ return show_temp(dev, buf, offset - 1); \
+} \
+static ssize_t \
+show_temp_##offset##_over (struct device *dev, struct device_attribute *attr, char *buf) \
+{ \
+ return show_temp_over(dev, buf, offset - 1); \
+} \
+static ssize_t \
+show_temp_##offset##_hyst (struct device *dev, struct device_attribute *attr, char *buf) \
+{ \
+ return show_temp_hyst(dev, buf, offset - 1); \
+} \
+static ssize_t set_temp_##offset##_over (struct device *dev, struct device_attribute *attr, \
+ const char *buf, size_t count) \
+{ \
+ return set_temp_over(dev, buf, count, offset - 1); \
+} \
+static ssize_t set_temp_##offset##_hyst (struct device *dev, struct device_attribute *attr, \
+ const char *buf, size_t count) \
+{ \
+ return set_temp_hyst(dev, buf, count, offset - 1); \
+} \
+static DEVICE_ATTR(temp##offset##_input, S_IRUGO, show_temp_##offset, NULL);\
+static DEVICE_ATTR(temp##offset##_max, S_IRUGO | S_IWUSR, \
+ show_temp_##offset##_over, set_temp_##offset##_over); \
+static DEVICE_ATTR(temp##offset##_max_hyst, S_IRUGO | S_IWUSR, \
+ show_temp_##offset##_hyst, set_temp_##offset##_hyst);
+
+show_temp_offset(1);
+show_temp_offset(2);
+show_temp_offset(3);
+
+/* 2 Fans */
+static ssize_t show_fan(struct device *dev, char *buf, int nr) {
+ struct via686a_data *data = via686a_update_device(dev);
+ return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[nr],
+ DIV_FROM_REG(data->fan_div[nr])) );
+}
+static ssize_t show_fan_min(struct device *dev, char *buf, int nr) {
+ struct via686a_data *data = via686a_update_device(dev);
+ return sprintf(buf, "%d\n",
+ FAN_FROM_REG(data->fan_min[nr], DIV_FROM_REG(data->fan_div[nr])) );
+}
+static ssize_t show_fan_div(struct device *dev, char *buf, int nr) {
+ struct via686a_data *data = via686a_update_device(dev);
+ return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr]) );
+}
+static ssize_t set_fan_min(struct device *dev, const char *buf,
+ size_t count, int nr) {
+ struct i2c_client *client = to_i2c_client(dev);
+ struct via686a_data *data = i2c_get_clientdata(client);
+ int val = simple_strtol(buf, NULL, 10);
+
+ down(&data->update_lock);
+ data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr]));
+ via686a_write_value(client, VIA686A_REG_FAN_MIN(nr+1), data->fan_min[nr]);
+ up(&data->update_lock);
+ return count;
+}
+static ssize_t set_fan_div(struct device *dev, const char *buf,
+ size_t count, int nr) {
+ struct i2c_client *client = to_i2c_client(dev);
+ struct via686a_data *data = i2c_get_clientdata(client);
+ int val = simple_strtol(buf, NULL, 10);
+ int old;
+
+ down(&data->update_lock);
+ old = via686a_read_value(client, 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(client, VIA686A_REG_FANDIV, old);
+ up(&data->update_lock);
+ return count;
+}
+
+#define show_fan_offset(offset) \
+static ssize_t show_fan_##offset (struct device *dev, struct device_attribute *attr, char *buf) \
+{ \
+ return show_fan(dev, buf, offset - 1); \
+} \
+static ssize_t show_fan_##offset##_min (struct device *dev, struct device_attribute *attr, char *buf) \
+{ \
+ return show_fan_min(dev, buf, offset - 1); \
+} \
+static ssize_t show_fan_##offset##_div (struct device *dev, struct device_attribute *attr, char *buf) \
+{ \
+ return show_fan_div(dev, buf, offset - 1); \
+} \
+static ssize_t set_fan_##offset##_min (struct device *dev, struct device_attribute *attr, \
+ const char *buf, size_t count) \
+{ \
+ return set_fan_min(dev, buf, count, offset - 1); \
+} \
+static ssize_t set_fan_##offset##_div (struct device *dev, struct device_attribute *attr, \
+ const char *buf, size_t count) \
+{ \
+ return set_fan_div(dev, buf, count, offset - 1); \
+} \
+static DEVICE_ATTR(fan##offset##_input, S_IRUGO, show_fan_##offset, NULL);\
+static DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \
+ show_fan_##offset##_min, set_fan_##offset##_min); \
+static DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR, \
+ show_fan_##offset##_div, set_fan_##offset##_div);
+
+show_fan_offset(1);
+show_fan_offset(2);
+
+/* Alarms */
+static ssize_t show_alarms(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(alarms, S_IRUGO, show_alarms, NULL);
+
+/* The driver. I choose to use type i2c_driver, as at is identical to both
+ smbus_driver and isa_driver, and clients could be of either kind */
+static struct i2c_driver via686a_driver = {
+ .owner = THIS_MODULE,
+ .name = "via686a",
+ .id = I2C_DRIVERID_VIA686A,
+ .flags = I2C_DF_NOTIFY,
+ .attach_adapter = via686a_attach_adapter,
+ .detach_client = via686a_detach_client,
+};
+
+
+/* This is called when the module is loaded */
+static int via686a_attach_adapter(struct i2c_adapter *adapter)
+{
+ if (!(adapter->class & I2C_CLASS_HWMON))
+ return 0;
+ return i2c_detect(adapter, &addr_data, via686a_detect);
+}
+
+static int via686a_detect(struct i2c_adapter *adapter, int address, int kind)
+{
+ struct i2c_client *new_client;
+ struct via686a_data *data;
+ int err = 0;
+ const char client_name[] = "via686a";
+ u16 val;
+
+ /* Make sure we are probing the ISA bus!! */
+ if (!i2c_is_isa_adapter(adapter)) {
+ dev_err(&adapter->dev,
+ "via686a_detect called for an I2C bus adapter?!?\n");
+ return 0;
+ }
+
+ /* 8231 requires multiple of 256, we enforce that on 686 as well */
+ if (force_addr)
+ address = force_addr & 0xFF00;
+
+ if (force_addr) {
+ dev_warn(&adapter->dev, "forcing ISA address 0x%04X\n",
+ address);
+ if (PCIBIOS_SUCCESSFUL !=
+ pci_write_config_word(s_bridge, VIA686A_BASE_REG, address))
+ return -ENODEV;
+ }
+ if (PCIBIOS_SUCCESSFUL !=
+ pci_read_config_word(s_bridge, VIA686A_ENABLE_REG, &val))
+ return -ENODEV;
+ if (!(val & 0x0001)) {
+ dev_warn(&adapter->dev, "enabling sensors\n");
+ if (PCIBIOS_SUCCESSFUL !=
+ pci_write_config_word(s_bridge, VIA686A_ENABLE_REG,
+ val | 0x0001))
+ return -ENODEV;
+ }
+
+ /* Reserve the ISA region */
+ if (!request_region(address, VIA686A_EXTENT, via686a_driver.name)) {
+ dev_err(&adapter->dev, "region 0x%x already in use!\n",
+ address);
+ return -ENODEV;
+ }
+
+ if (!(data = kmalloc(sizeof(struct via686a_data), GFP_KERNEL))) {
+ err = -ENOMEM;
+ goto ERROR0;
+ }
+ memset(data, 0, sizeof(struct via686a_data));
+
+ new_client = &data->client;
+ i2c_set_clientdata(new_client, data);
+ new_client->addr = address;
+ new_client->adapter = adapter;
+ new_client->driver = &via686a_driver;
+ new_client->flags = 0;
+
+ /* Fill in the remaining client fields and put into the global list */
+ strlcpy(new_client->name, client_name, I2C_NAME_SIZE);
+
+ data->valid = 0;
+ init_MUTEX(&data->update_lock);
+ /* Tell the I2C layer a new client has arrived */
+ if ((err = i2c_attach_client(new_client)))
+ goto ERROR3;
+
+ /* Initialize the VIA686A chip */
+ via686a_init_client(new_client);
+
+ /* Register sysfs hooks */
+ device_create_file(&new_client->dev, &dev_attr_in0_input);
+ device_create_file(&new_client->dev, &dev_attr_in1_input);
+ device_create_file(&new_client->dev, &dev_attr_in2_input);
+ device_create_file(&new_client->dev, &dev_attr_in3_input);
+ device_create_file(&new_client->dev, &dev_attr_in4_input);
+ device_create_file(&new_client->dev, &dev_attr_in0_min);
+ device_create_file(&new_client->dev, &dev_attr_in1_min);
+ device_create_file(&new_client->dev, &dev_attr_in2_min);
+ device_create_file(&new_client->dev, &dev_attr_in3_min);
+ device_create_file(&new_client->dev, &dev_attr_in4_min);
+ device_create_file(&new_client->dev, &dev_attr_in0_max);
+ device_create_file(&new_client->dev, &dev_attr_in1_max);
+ device_create_file(&new_client->dev, &dev_attr_in2_max);
+ device_create_file(&new_client->dev, &dev_attr_in3_max);
+ device_create_file(&new_client->dev, &dev_attr_in4_max);
+ device_create_file(&new_client->dev, &dev_attr_temp1_input);
+ device_create_file(&new_client->dev, &dev_attr_temp2_input);
+ device_create_file(&new_client->dev, &dev_attr_temp3_input);
+ device_create_file(&new_client->dev, &dev_attr_temp1_max);
+ device_create_file(&new_client->dev, &dev_attr_temp2_max);
+ device_create_file(&new_client->dev, &dev_attr_temp3_max);
+ device_create_file(&new_client->dev, &dev_attr_temp1_max_hyst);
+ device_create_file(&new_client->dev, &dev_attr_temp2_max_hyst);
+ device_create_file(&new_client->dev, &dev_attr_temp3_max_hyst);
+ device_create_file(&new_client->dev, &dev_attr_fan1_input);
+ device_create_file(&new_client->dev, &dev_attr_fan2_input);
+ device_create_file(&new_client->dev, &dev_attr_fan1_min);
+ device_create_file(&new_client->dev, &dev_attr_fan2_min);
+ device_create_file(&new_client->dev, &dev_attr_fan1_div);
+ device_create_file(&new_client->dev, &dev_attr_fan2_div);
+ device_create_file(&new_client->dev, &dev_attr_alarms);
+
+ return 0;
+
+ERROR3:
+ kfree(data);
+ERROR0:
+ release_region(address, VIA686A_EXTENT);
+ return err;
+}
+
+static int via686a_detach_client(struct i2c_client *client)
+{
+ int err;
+
+ if ((err = i2c_detach_client(client))) {
+ dev_err(&client->dev,
+ "Client deregistration failed, client not detached.\n");
+ return err;
+ }
+
+ release_region(client->addr, VIA686A_EXTENT);
+ kfree(i2c_get_clientdata(client));
+
+ return 0;
+}
+
+/* Called when we have found a new VIA686A. Set limits, etc. */
+static void via686a_init_client(struct i2c_client *client)
+{
+ u8 reg;
+
+ /* Start monitoring */
+ reg = via686a_read_value(client, VIA686A_REG_CONFIG);
+ via686a_write_value(client, VIA686A_REG_CONFIG, (reg|0x01)&0x7F);
+
+ /* Configure temp interrupt mode for continuous-interrupt operation */
+ via686a_write_value(client, VIA686A_REG_TEMP_MODE,
+ via686a_read_value(client, VIA686A_REG_TEMP_MODE) &
+ !(VIA686A_TEMP_MODE_MASK | VIA686A_TEMP_MODE_CONTINUOUS));
+}
+
+static struct via686a_data *via686a_update_device(struct device *dev)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ struct via686a_data *data = i2c_get_clientdata(client);
+ int i;
+
+ down(&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(client, VIA686A_REG_IN(i));
+ data->in_min[i] = via686a_read_value(client,
+ VIA686A_REG_IN_MIN
+ (i));
+ data->in_max[i] =
+ via686a_read_value(client, VIA686A_REG_IN_MAX(i));
+ }
+ for (i = 1; i <= 2; i++) {
+ data->fan[i - 1] =
+ via686a_read_value(client, VIA686A_REG_FAN(i));
+ data->fan_min[i - 1] = via686a_read_value(client,
+ VIA686A_REG_FAN_MIN(i));
+ }
+ for (i = 0; i <= 2; i++) {
+ data->temp[i] = via686a_read_value(client,
+ VIA686A_REG_TEMP[i]) << 2;
+ data->temp_over[i] =
+ via686a_read_value(client,
+ VIA686A_REG_TEMP_OVER[i]);
+ data->temp_hyst[i] =
+ via686a_read_value(client,
+ 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(client,
+ VIA686A_REG_TEMP_LOW1)
+ & 0xc0) >> 6;
+ data->temp[1] |=
+ (via686a_read_value(client, VIA686A_REG_TEMP_LOW23) &
+ 0x30) >> 4;
+ data->temp[2] |=
+ (via686a_read_value(client, VIA686A_REG_TEMP_LOW23) &
+ 0xc0) >> 6;
+
+ i = via686a_read_value(client, VIA686A_REG_FANDIV);
+ data->fan_div[0] = (i >> 4) & 0x03;
+ data->fan_div[1] = i >> 6;
+ data->alarms =
+ via686a_read_value(client,
+ VIA686A_REG_ALARM1) |
+ (via686a_read_value(client, VIA686A_REG_ALARM2) << 8);
+ data->last_updated = jiffies;
+ data->valid = 1;
+ }
+
+ up(&data->update_lock);
+
+ return data;
+}
+
+static struct pci_device_id via686a_pci_ids[] = {
+ { PCI_DEVICE(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C686_4) },
+ { 0, }
+};
+
+MODULE_DEVICE_TABLE(pci, via686a_pci_ids);
+
+static int __devinit via686a_pci_probe(struct pci_dev *dev,
+ const struct pci_device_id *id)
+{
+ u16 val;
+ int addr = 0;
+
+ if (PCIBIOS_SUCCESSFUL !=
+ pci_read_config_word(dev, VIA686A_BASE_REG, &val))
+ return -ENODEV;
+
+ addr = val & ~(VIA686A_EXTENT - 1);
+ if (addr == 0 && force_addr == 0) {
+ dev_err(&dev->dev, "base address not set - upgrade BIOS "
+ "or use force_addr=0xaddr\n");
+ return -ENODEV;
+ }
+ if (force_addr)
+ addr = force_addr; /* so detect will get called */
+
+ if (!addr) {
+ dev_err(&dev->dev, "No Via 686A sensors found.\n");
+ return -ENODEV;
+ }
+ normal_isa[0] = addr;
+
+ s_bridge = pci_dev_get(dev);
+ if (i2c_add_driver(&via686a_driver)) {
+ pci_dev_put(s_bridge);
+ s_bridge = NULL;
+ }
+
+ /* 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.
+ */
+ return -ENODEV;
+}
+
+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);
+}
+
+static void __exit sm_via686a_exit(void)
+{
+ pci_unregister_driver(&via686a_pci_driver);
+ if (s_bridge != NULL) {
+ i2c_del_driver(&via686a_driver);
+ pci_dev_put(s_bridge);
+ s_bridge = NULL;
+ }
+}
+
+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);
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.