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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
Guenter Roeck9004ac82012-01-15 06:38:23 -08002 * via686a.c - Part of lm_sensors, Linux kernel modules
3 * for hardware monitoring
4 *
5 * Copyright (c) 1998 - 2002 Frodo Looijaard <frodol@dds.nl>,
6 * Kyösti Mälkki <kmalkki@cc.hut.fi>,
7 * Mark Studebaker <mdsxyz123@yahoo.com>,
8 * and Bob Dougherty <bobd@stanford.edu>
9 *
10 * (Some conversion-factor data were contributed by Jonathan Teh Soon Yew
11 * <j.teh@iname.com> and Alex van Kaam <darkside@chello.nl>.)
12 *
13 * This program is free software; you can redistribute it and/or modify
14 * it under the terms of the GNU General Public License as published by
15 * the Free Software Foundation; either version 2 of the License, or
16 * (at your option) any later version.
17 *
18 * This program is distributed in the hope that it will be useful,
19 * but WITHOUT ANY WARRANTY; without even the implied warranty of
20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 * GNU General Public License for more details.
22 *
23 * You should have received a copy of the GNU General Public License
24 * along with this program; if not, write to the Free Software
25 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
26 */
Linus Torvalds1da177e2005-04-16 15:20:36 -070027
28/*
Guenter Roeck9004ac82012-01-15 06:38:23 -080029 * Supports the Via VT82C686A, VT82C686B south bridges.
30 * Reports all as a 686A.
31 * Warning - only supports a single device.
32 */
Linus Torvalds1da177e2005-04-16 15:20:36 -070033
Joe Perches774f7822010-10-20 06:51:51 +000034#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
35
Linus Torvalds1da177e2005-04-16 15:20:36 -070036#include <linux/module.h>
37#include <linux/slab.h>
38#include <linux/pci.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070039#include <linux/jiffies.h>
Jean Delvare2ec342e2007-06-09 10:11:16 -040040#include <linux/platform_device.h>
Mark M. Hoffman943b0832005-07-15 21:39:18 -040041#include <linux/hwmon.h>
Jean Delvare1e71a5a2007-06-09 10:11:16 -040042#include <linux/hwmon-sysfs.h>
Mark M. Hoffman943b0832005-07-15 21:39:18 -040043#include <linux/err.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070044#include <linux/init.h>
Ingo Molnar9a61bf62006-01-18 23:19:26 +010045#include <linux/mutex.h>
Jean Delvarea5ebe662006-09-24 21:24:46 +020046#include <linux/sysfs.h>
Jean Delvareb9acb642009-01-07 16:37:35 +010047#include <linux/acpi.h>
H Hartley Sweeten6055fae2009-09-15 17:18:13 +020048#include <linux/io.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070049
50
Guenter Roeck9004ac82012-01-15 06:38:23 -080051/*
52 * If force_addr is set to anything different from 0, we forcibly enable
53 * the device at the given address.
54 */
Jean Delvare02002962005-09-25 16:26:44 +020055static unsigned short force_addr;
Linus Torvalds1da177e2005-04-16 15:20:36 -070056module_param(force_addr, ushort, 0);
57MODULE_PARM_DESC(force_addr,
58 "Initialize the base address of the sensors");
59
Jean Delvare2ec342e2007-06-09 10:11:16 -040060static struct platform_device *pdev;
Linus Torvalds1da177e2005-04-16 15:20:36 -070061
62/*
Guenter Roeck9004ac82012-01-15 06:38:23 -080063 * The Via 686a southbridge has a LM78-like chip integrated on the same IC.
64 * This driver is a customized copy of lm78.c
65 */
Linus Torvalds1da177e2005-04-16 15:20:36 -070066
67/* Many VIA686A constants specified below */
68
69/* Length of ISA address segment */
Jean Delvarebe8992c2005-05-16 19:00:52 +020070#define VIA686A_EXTENT 0x80
71#define VIA686A_BASE_REG 0x70
72#define VIA686A_ENABLE_REG 0x74
Linus Torvalds1da177e2005-04-16 15:20:36 -070073
74/* The VIA686A registers */
75/* ins numbered 0-4 */
Jean Delvarebe8992c2005-05-16 19:00:52 +020076#define VIA686A_REG_IN_MAX(nr) (0x2b + ((nr) * 2))
77#define VIA686A_REG_IN_MIN(nr) (0x2c + ((nr) * 2))
78#define VIA686A_REG_IN(nr) (0x22 + (nr))
Linus Torvalds1da177e2005-04-16 15:20:36 -070079
80/* fans numbered 1-2 */
Jean Delvarebe8992c2005-05-16 19:00:52 +020081#define VIA686A_REG_FAN_MIN(nr) (0x3a + (nr))
82#define VIA686A_REG_FAN(nr) (0x28 + (nr))
Linus Torvalds1da177e2005-04-16 15:20:36 -070083
Linus Torvalds1da177e2005-04-16 15:20:36 -070084/* temps numbered 1-3 */
Jean Delvare563db2f2005-05-17 22:38:57 +020085static const u8 VIA686A_REG_TEMP[] = { 0x20, 0x21, 0x1f };
86static const u8 VIA686A_REG_TEMP_OVER[] = { 0x39, 0x3d, 0x1d };
87static const u8 VIA686A_REG_TEMP_HYST[] = { 0x3a, 0x3e, 0x1e };
Jean Delvarebe8992c2005-05-16 19:00:52 +020088/* bits 7-6 */
89#define VIA686A_REG_TEMP_LOW1 0x4b
90/* 2 = bits 5-4, 3 = bits 7-6 */
91#define VIA686A_REG_TEMP_LOW23 0x49
Linus Torvalds1da177e2005-04-16 15:20:36 -070092
Jean Delvarebe8992c2005-05-16 19:00:52 +020093#define VIA686A_REG_ALARM1 0x41
94#define VIA686A_REG_ALARM2 0x42
95#define VIA686A_REG_FANDIV 0x47
96#define VIA686A_REG_CONFIG 0x40
Guenter Roeck9004ac82012-01-15 06:38:23 -080097/*
98 * The following register sets temp interrupt mode (bits 1-0 for temp1,
99 * 3-2 for temp2, 5-4 for temp3). Modes are:
100 * 00 interrupt stays as long as value is out-of-range
101 * 01 interrupt is cleared once register is read (default)
102 * 10 comparator mode- like 00, but ignores hysteresis
103 * 11 same as 00
104 */
Jean Delvarebe8992c2005-05-16 19:00:52 +0200105#define VIA686A_REG_TEMP_MODE 0x4b
Linus Torvalds1da177e2005-04-16 15:20:36 -0700106/* We'll just assume that you want to set all 3 simultaneously: */
Jean Delvarebe8992c2005-05-16 19:00:52 +0200107#define VIA686A_TEMP_MODE_MASK 0x3F
108#define VIA686A_TEMP_MODE_CONTINUOUS 0x00
Linus Torvalds1da177e2005-04-16 15:20:36 -0700109
Guenter Roeck9004ac82012-01-15 06:38:23 -0800110/*
111 * Conversions. Limit checking is only done on the TO_REG
112 * variants.
113 *
114 ******** VOLTAGE CONVERSIONS (Bob Dougherty) ********
115 * From HWMon.cpp (Copyright 1998-2000 Jonathan Teh Soon Yew):
116 * voltagefactor[0]=1.25/2628; (2628/1.25=2102.4) // Vccp
117 * voltagefactor[1]=1.25/2628; (2628/1.25=2102.4) // +2.5V
118 * voltagefactor[2]=1.67/2628; (2628/1.67=1573.7) // +3.3V
119 * voltagefactor[3]=2.6/2628; (2628/2.60=1010.8) // +5V
120 * voltagefactor[4]=6.3/2628; (2628/6.30=417.14) // +12V
121 * in[i]=(data[i+2]*25.0+133)*voltagefactor[i];
122 * That is:
123 * volts = (25*regVal+133)*factor
124 * regVal = (volts/factor-133)/25
125 * (These conversions were contributed by Jonathan Teh Soon Yew
126 * <j.teh@iname.com>)
127 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700128static inline u8 IN_TO_REG(long val, int inNum)
129{
Guenter Roeck9004ac82012-01-15 06:38:23 -0800130 /*
131 * To avoid floating point, we multiply constants by 10 (100 for +12V).
132 * Rounding is done (120500 is actually 133000 - 12500).
133 * Remember that val is expressed in 0.001V/bit, which is why we divide
134 * by an additional 10000 (100000 for +12V): 1000 for val and 10 (100)
135 * for the constants.
136 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700137 if (inNum <= 1)
138 return (u8)
139 SENSORS_LIMIT((val * 21024 - 1205000) / 250000, 0, 255);
140 else if (inNum == 2)
141 return (u8)
142 SENSORS_LIMIT((val * 15737 - 1205000) / 250000, 0, 255);
143 else if (inNum == 3)
144 return (u8)
145 SENSORS_LIMIT((val * 10108 - 1205000) / 250000, 0, 255);
146 else
147 return (u8)
148 SENSORS_LIMIT((val * 41714 - 12050000) / 2500000, 0, 255);
149}
150
151static inline long IN_FROM_REG(u8 val, int inNum)
152{
Guenter Roeck9004ac82012-01-15 06:38:23 -0800153 /*
154 * To avoid floating point, we multiply constants by 10 (100 for +12V).
155 * We also multiply them by 1000 because we want 0.001V/bit for the
156 * output value. Rounding is done.
157 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700158 if (inNum <= 1)
159 return (long) ((250000 * val + 1330000 + 21024 / 2) / 21024);
160 else if (inNum == 2)
161 return (long) ((250000 * val + 1330000 + 15737 / 2) / 15737);
162 else if (inNum == 3)
163 return (long) ((250000 * val + 1330000 + 10108 / 2) / 10108);
164 else
165 return (long) ((2500000 * val + 13300000 + 41714 / 2) / 41714);
166}
167
168/********* FAN RPM CONVERSIONS ********/
Guenter Roeck9004ac82012-01-15 06:38:23 -0800169/*
170 * Higher register values = slower fans (the fan's strobe gates a counter).
171 * But this chip saturates back at 0, not at 255 like all the other chips.
172 * So, 0 means 0 RPM
173 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700174static inline u8 FAN_TO_REG(long rpm, int div)
175{
176 if (rpm == 0)
177 return 0;
178 rpm = SENSORS_LIMIT(rpm, 1, 1000000);
179 return SENSORS_LIMIT((1350000 + rpm * div / 2) / (rpm * div), 1, 255);
180}
181
Guenter Roeck9004ac82012-01-15 06:38:23 -0800182#define FAN_FROM_REG(val, div) ((val) == 0 ? 0 : (val) == 255 ? 0 : 1350000 / \
183 ((val) * (div)))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700184
185/******** TEMP CONVERSIONS (Bob Dougherty) *********/
Guenter Roeck9004ac82012-01-15 06:38:23 -0800186/*
187 * linear fits from HWMon.cpp (Copyright 1998-2000 Jonathan Teh Soon Yew)
188 * if(temp<169)
189 * return double(temp)*0.427-32.08;
190 * else if(temp>=169 && temp<=202)
191 * return double(temp)*0.582-58.16;
192 * else
193 * return double(temp)*0.924-127.33;
194 *
195 * A fifth-order polynomial fits the unofficial data (provided by Alex van
196 * Kaam <darkside@chello.nl>) a bit better. It also give more reasonable
197 * numbers on my machine (ie. they agree with what my BIOS tells me).
198 * Here's the fifth-order fit to the 8-bit data:
199 * temp = 1.625093e-10*val^5 - 1.001632e-07*val^4 + 2.457653e-05*val^3 -
200 * 2.967619e-03*val^2 + 2.175144e-01*val - 7.090067e+0.
201 *
202 * (2000-10-25- RFD: thanks to Uwe Andersen <uandersen@mayah.com> for
203 * finding my typos in this formula!)
204 *
205 * Alas, none of the elegant function-fit solutions will work because we
206 * aren't allowed to use floating point in the kernel and doing it with
207 * integers doesn't provide enough precision. So we'll do boring old
208 * look-up table stuff. The unofficial data (see below) have effectively
209 * 7-bit resolution (they are rounded to the nearest degree). I'm assuming
210 * that the transfer function of the device is monotonic and smooth, so a
211 * smooth function fit to the data will allow us to get better precision.
212 * I used the 5th-order poly fit described above and solved for
213 * VIA register values 0-255. I *10 before rounding, so we get tenth-degree
214 * precision. (I could have done all 1024 values for our 10-bit readings,
215 * but the function is very linear in the useful range (0-80 deg C), so
216 * we'll just use linear interpolation for 10-bit readings.) So, tempLUT
217 * is the temp at via register values 0-255:
218 */
219static const s16 tempLUT[] = {
220 -709, -688, -667, -646, -627, -607, -589, -570, -553, -536, -519,
Jean Delvarebe8992c2005-05-16 19:00:52 +0200221 -503, -487, -471, -456, -442, -428, -414, -400, -387, -375,
222 -362, -350, -339, -327, -316, -305, -295, -285, -275, -265,
223 -255, -246, -237, -229, -220, -212, -204, -196, -188, -180,
224 -173, -166, -159, -152, -145, -139, -132, -126, -120, -114,
225 -108, -102, -96, -91, -85, -80, -74, -69, -64, -59, -54, -49,
226 -44, -39, -34, -29, -25, -20, -15, -11, -6, -2, 3, 7, 12, 16,
227 20, 25, 29, 33, 37, 42, 46, 50, 54, 59, 63, 67, 71, 75, 79, 84,
228 88, 92, 96, 100, 104, 109, 113, 117, 121, 125, 130, 134, 138,
229 142, 146, 151, 155, 159, 163, 168, 172, 176, 181, 185, 189,
230 193, 198, 202, 206, 211, 215, 219, 224, 228, 232, 237, 241,
231 245, 250, 254, 259, 263, 267, 272, 276, 281, 285, 290, 294,
232 299, 303, 307, 312, 316, 321, 325, 330, 334, 339, 344, 348,
233 353, 357, 362, 366, 371, 376, 380, 385, 390, 395, 399, 404,
234 409, 414, 419, 423, 428, 433, 438, 443, 449, 454, 459, 464,
235 469, 475, 480, 486, 491, 497, 502, 508, 514, 520, 526, 532,
236 538, 544, 551, 557, 564, 571, 578, 584, 592, 599, 606, 614,
237 621, 629, 637, 645, 654, 662, 671, 680, 689, 698, 708, 718,
238 728, 738, 749, 759, 770, 782, 793, 805, 818, 830, 843, 856,
239 870, 883, 898, 912, 927, 943, 958, 975, 991, 1008, 1026, 1044,
240 1062, 1081, 1101, 1121, 1141, 1162, 1184, 1206, 1229, 1252,
241 1276, 1301, 1326, 1352, 1378, 1406, 1434, 1462
Linus Torvalds1da177e2005-04-16 15:20:36 -0700242};
243
Guenter Roeck9004ac82012-01-15 06:38:23 -0800244/*
245 * the original LUT values from Alex van Kaam <darkside@chello.nl>
246 * (for via register values 12-240):
247 * {-50,-49,-47,-45,-43,-41,-39,-38,-37,-35,-34,-33,-32,-31,
248 * -30,-29,-28,-27,-26,-25,-24,-24,-23,-22,-21,-20,-20,-19,-18,-17,-17,-16,-15,
249 * -15,-14,-14,-13,-12,-12,-11,-11,-10,-9,-9,-8,-8,-7,-7,-6,-6,-5,-5,-4,-4,-3,
250 * -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,
251 * 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,
252 * 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,
253 * 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,
254 * 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,
255 * 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,
256 * 85,86,88,89,91,92,94,96,97,99,101,103,105,107,109,110};
257 *
258 *
259 * Here's the reverse LUT. I got it by doing a 6-th order poly fit (needed
260 * an extra term for a good fit to these inverse data!) and then
261 * solving for each temp value from -50 to 110 (the useable range for
262 * this chip). Here's the fit:
263 * viaRegVal = -1.160370e-10*val^6 +3.193693e-08*val^5 - 1.464447e-06*val^4
264 * - 2.525453e-04*val^3 + 1.424593e-02*val^2 + 2.148941e+00*val +7.275808e+01)
265 * Note that n=161:
266 */
267static const u8 viaLUT[] = {
268 12, 12, 13, 14, 14, 15, 16, 16, 17, 18, 18, 19, 20, 20, 21, 22, 23,
Jean Delvarebe8992c2005-05-16 19:00:52 +0200269 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 35, 36, 37, 39, 40,
270 41, 43, 45, 46, 48, 49, 51, 53, 55, 57, 59, 60, 62, 64, 66,
271 69, 71, 73, 75, 77, 79, 82, 84, 86, 88, 91, 93, 95, 98, 100,
272 103, 105, 107, 110, 112, 115, 117, 119, 122, 124, 126, 129,
273 131, 134, 136, 138, 140, 143, 145, 147, 150, 152, 154, 156,
274 158, 160, 162, 164, 166, 168, 170, 172, 174, 176, 178, 180,
275 182, 183, 185, 187, 188, 190, 192, 193, 195, 196, 198, 199,
276 200, 202, 203, 205, 206, 207, 208, 209, 210, 211, 212, 213,
277 214, 215, 216, 217, 218, 219, 220, 221, 222, 222, 223, 224,
278 225, 226, 226, 227, 228, 228, 229, 230, 230, 231, 232, 232,
279 233, 233, 234, 235, 235, 236, 236, 237, 237, 238, 238, 239,
280 239, 240
Linus Torvalds1da177e2005-04-16 15:20:36 -0700281};
282
Guenter Roeck9004ac82012-01-15 06:38:23 -0800283/*
284 * Converting temps to (8-bit) hyst and over registers
285 * No interpolation here.
286 * The +50 is because the temps start at -50
287 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700288static inline u8 TEMP_TO_REG(long val)
289{
Jean Delvarebe8992c2005-05-16 19:00:52 +0200290 return viaLUT[val <= -50000 ? 0 : val >= 110000 ? 160 :
Linus Torvalds1da177e2005-04-16 15:20:36 -0700291 (val < 0 ? val - 500 : val + 500) / 1000 + 50];
292}
293
294/* for 8-bit temperature hyst and over registers */
Jean Delvare088341b2005-09-10 23:00:46 +0200295#define TEMP_FROM_REG(val) ((long)tempLUT[val] * 100)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700296
297/* for 10-bit temperature readings */
298static inline long TEMP_FROM_REG10(u16 val)
299{
300 u16 eightBits = val >> 2;
301 u16 twoBits = val & 3;
302
303 /* no interpolation for these */
304 if (twoBits == 0 || eightBits == 255)
305 return TEMP_FROM_REG(eightBits);
306
307 /* do some linear interpolation */
308 return (tempLUT[eightBits] * (4 - twoBits) +
Jean Delvarebe8992c2005-05-16 19:00:52 +0200309 tempLUT[eightBits + 1] * twoBits) * 25;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700310}
311
Linus Torvalds1da177e2005-04-16 15:20:36 -0700312#define DIV_FROM_REG(val) (1 << (val))
Guenter Roeck9004ac82012-01-15 06:38:23 -0800313#define DIV_TO_REG(val) ((val) == 8 ? 3 : (val) == 4 ? 2 : (val) == 1 ? 0 : 1)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700314
Guenter Roeck9004ac82012-01-15 06:38:23 -0800315/*
316 * For each registered chip, we need to keep some data in memory.
317 * The structure is dynamically allocated.
318 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700319struct via686a_data {
Jean Delvare2ec342e2007-06-09 10:11:16 -0400320 unsigned short addr;
321 const char *name;
Tony Jones1beeffe2007-08-20 13:46:20 -0700322 struct device *hwmon_dev;
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100323 struct mutex update_lock;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700324 char valid; /* !=0 if following fields are valid */
325 unsigned long last_updated; /* In jiffies */
326
327 u8 in[5]; /* Register value */
328 u8 in_max[5]; /* Register value */
329 u8 in_min[5]; /* Register value */
330 u8 fan[2]; /* Register value */
331 u8 fan_min[2]; /* Register value */
332 u16 temp[3]; /* Register value 10 bit */
333 u8 temp_over[3]; /* Register value */
334 u8 temp_hyst[3]; /* Register value */
335 u8 fan_div[2]; /* Register encoding, shifted right */
336 u16 alarms; /* Register encoding, combined */
337};
338
339static struct pci_dev *s_bridge; /* pointer to the (only) via686a */
340
Jean Delvare2ec342e2007-06-09 10:11:16 -0400341static int via686a_probe(struct platform_device *pdev);
Bill Pemberton281dfd02012-11-19 13:25:51 -0500342static int via686a_remove(struct platform_device *pdev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700343
Jean Delvare2ec342e2007-06-09 10:11:16 -0400344static inline int via686a_read_value(struct via686a_data *data, u8 reg)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700345{
Jean Delvare2ec342e2007-06-09 10:11:16 -0400346 return inb_p(data->addr + reg);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700347}
348
Jean Delvare2ec342e2007-06-09 10:11:16 -0400349static inline void via686a_write_value(struct via686a_data *data, u8 reg,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700350 u8 value)
351{
Jean Delvare2ec342e2007-06-09 10:11:16 -0400352 outb_p(value, data->addr + reg);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700353}
354
355static struct via686a_data *via686a_update_device(struct device *dev);
Jean Delvare2ec342e2007-06-09 10:11:16 -0400356static void via686a_init_device(struct via686a_data *data);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700357
358/* following are the sysfs callback functions */
359
360/* 7 voltage sensors */
Jean Delvare1e71a5a2007-06-09 10:11:16 -0400361static ssize_t show_in(struct device *dev, struct device_attribute *da,
362 char *buf) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700363 struct via686a_data *data = via686a_update_device(dev);
Jean Delvare1e71a5a2007-06-09 10:11:16 -0400364 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
365 int nr = attr->index;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700366 return sprintf(buf, "%ld\n", IN_FROM_REG(data->in[nr], nr));
367}
368
Jean Delvare1e71a5a2007-06-09 10:11:16 -0400369static ssize_t show_in_min(struct device *dev, struct device_attribute *da,
370 char *buf) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700371 struct via686a_data *data = via686a_update_device(dev);
Jean Delvare1e71a5a2007-06-09 10:11:16 -0400372 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
373 int nr = attr->index;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700374 return sprintf(buf, "%ld\n", IN_FROM_REG(data->in_min[nr], nr));
375}
376
Jean Delvare1e71a5a2007-06-09 10:11:16 -0400377static ssize_t show_in_max(struct device *dev, struct device_attribute *da,
378 char *buf) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700379 struct via686a_data *data = via686a_update_device(dev);
Jean Delvare1e71a5a2007-06-09 10:11:16 -0400380 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
381 int nr = attr->index;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700382 return sprintf(buf, "%ld\n", IN_FROM_REG(data->in_max[nr], nr));
383}
384
Jean Delvare1e71a5a2007-06-09 10:11:16 -0400385static ssize_t set_in_min(struct device *dev, struct device_attribute *da,
386 const char *buf, size_t count) {
Jean Delvare2ec342e2007-06-09 10:11:16 -0400387 struct via686a_data *data = dev_get_drvdata(dev);
Jean Delvare1e71a5a2007-06-09 10:11:16 -0400388 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
389 int nr = attr->index;
Guenter Roeck9004ac82012-01-15 06:38:23 -0800390 unsigned long val;
391 int err;
392
393 err = kstrtoul(buf, 10, &val);
394 if (err)
395 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700396
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100397 mutex_lock(&data->update_lock);
Jean Delvarebe8992c2005-05-16 19:00:52 +0200398 data->in_min[nr] = IN_TO_REG(val, nr);
Jean Delvare2ec342e2007-06-09 10:11:16 -0400399 via686a_write_value(data, VIA686A_REG_IN_MIN(nr),
Linus Torvalds1da177e2005-04-16 15:20:36 -0700400 data->in_min[nr]);
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100401 mutex_unlock(&data->update_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700402 return count;
403}
Jean Delvare1e71a5a2007-06-09 10:11:16 -0400404static ssize_t set_in_max(struct device *dev, struct device_attribute *da,
405 const char *buf, size_t count) {
Jean Delvare2ec342e2007-06-09 10:11:16 -0400406 struct via686a_data *data = dev_get_drvdata(dev);
Jean Delvare1e71a5a2007-06-09 10:11:16 -0400407 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
408 int nr = attr->index;
Guenter Roeck9004ac82012-01-15 06:38:23 -0800409 unsigned long val;
410 int err;
411
412 err = kstrtoul(buf, 10, &val);
413 if (err)
414 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700415
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100416 mutex_lock(&data->update_lock);
Jean Delvarebe8992c2005-05-16 19:00:52 +0200417 data->in_max[nr] = IN_TO_REG(val, nr);
Jean Delvare2ec342e2007-06-09 10:11:16 -0400418 via686a_write_value(data, VIA686A_REG_IN_MAX(nr),
Linus Torvalds1da177e2005-04-16 15:20:36 -0700419 data->in_max[nr]);
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100420 mutex_unlock(&data->update_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700421 return count;
422}
423#define show_in_offset(offset) \
Jean Delvare1e71a5a2007-06-09 10:11:16 -0400424static SENSOR_DEVICE_ATTR(in##offset##_input, S_IRUGO, \
425 show_in, NULL, offset); \
426static SENSOR_DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \
427 show_in_min, set_in_min, offset); \
428static SENSOR_DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \
429 show_in_max, set_in_max, offset);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700430
431show_in_offset(0);
432show_in_offset(1);
433show_in_offset(2);
434show_in_offset(3);
435show_in_offset(4);
436
437/* 3 temperatures */
Jean Delvare1e71a5a2007-06-09 10:11:16 -0400438static ssize_t show_temp(struct device *dev, struct device_attribute *da,
439 char *buf) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700440 struct via686a_data *data = via686a_update_device(dev);
Jean Delvare1e71a5a2007-06-09 10:11:16 -0400441 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
442 int nr = attr->index;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700443 return sprintf(buf, "%ld\n", TEMP_FROM_REG10(data->temp[nr]));
444}
Jean Delvare1e71a5a2007-06-09 10:11:16 -0400445static ssize_t show_temp_over(struct device *dev, struct device_attribute *da,
446 char *buf) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700447 struct via686a_data *data = via686a_update_device(dev);
Jean Delvare1e71a5a2007-06-09 10:11:16 -0400448 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
449 int nr = attr->index;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700450 return sprintf(buf, "%ld\n", TEMP_FROM_REG(data->temp_over[nr]));
451}
Jean Delvare1e71a5a2007-06-09 10:11:16 -0400452static ssize_t show_temp_hyst(struct device *dev, struct device_attribute *da,
453 char *buf) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700454 struct via686a_data *data = via686a_update_device(dev);
Jean Delvare1e71a5a2007-06-09 10:11:16 -0400455 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
456 int nr = attr->index;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700457 return sprintf(buf, "%ld\n", TEMP_FROM_REG(data->temp_hyst[nr]));
458}
Jean Delvare1e71a5a2007-06-09 10:11:16 -0400459static ssize_t set_temp_over(struct device *dev, struct device_attribute *da,
460 const char *buf, size_t count) {
Jean Delvare2ec342e2007-06-09 10:11:16 -0400461 struct via686a_data *data = dev_get_drvdata(dev);
Jean Delvare1e71a5a2007-06-09 10:11:16 -0400462 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
463 int nr = attr->index;
Guenter Roeck9004ac82012-01-15 06:38:23 -0800464 long val;
465 int err;
466
467 err = kstrtol(buf, 10, &val);
468 if (err)
469 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700470
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100471 mutex_lock(&data->update_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700472 data->temp_over[nr] = TEMP_TO_REG(val);
Jean Delvare2ec342e2007-06-09 10:11:16 -0400473 via686a_write_value(data, VIA686A_REG_TEMP_OVER[nr],
Jean Delvare563db2f2005-05-17 22:38:57 +0200474 data->temp_over[nr]);
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100475 mutex_unlock(&data->update_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700476 return count;
477}
Jean Delvare1e71a5a2007-06-09 10:11:16 -0400478static ssize_t set_temp_hyst(struct device *dev, struct device_attribute *da,
479 const char *buf, size_t count) {
Jean Delvare2ec342e2007-06-09 10:11:16 -0400480 struct via686a_data *data = dev_get_drvdata(dev);
Jean Delvare1e71a5a2007-06-09 10:11:16 -0400481 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
482 int nr = attr->index;
Guenter Roeck9004ac82012-01-15 06:38:23 -0800483 long val;
484 int err;
485
486 err = kstrtol(buf, 10, &val);
487 if (err)
488 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700489
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100490 mutex_lock(&data->update_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700491 data->temp_hyst[nr] = TEMP_TO_REG(val);
Jean Delvare2ec342e2007-06-09 10:11:16 -0400492 via686a_write_value(data, VIA686A_REG_TEMP_HYST[nr],
Jean Delvare563db2f2005-05-17 22:38:57 +0200493 data->temp_hyst[nr]);
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100494 mutex_unlock(&data->update_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700495 return count;
496}
497#define show_temp_offset(offset) \
Jean Delvare1e71a5a2007-06-09 10:11:16 -0400498static SENSOR_DEVICE_ATTR(temp##offset##_input, S_IRUGO, \
499 show_temp, NULL, offset - 1); \
500static SENSOR_DEVICE_ATTR(temp##offset##_max, S_IRUGO | S_IWUSR, \
501 show_temp_over, set_temp_over, offset - 1); \
502static SENSOR_DEVICE_ATTR(temp##offset##_max_hyst, S_IRUGO | S_IWUSR, \
503 show_temp_hyst, set_temp_hyst, offset - 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700504
505show_temp_offset(1);
506show_temp_offset(2);
507show_temp_offset(3);
508
509/* 2 Fans */
Jean Delvare1e71a5a2007-06-09 10:11:16 -0400510static ssize_t show_fan(struct device *dev, struct device_attribute *da,
511 char *buf) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700512 struct via686a_data *data = via686a_update_device(dev);
Jean Delvare1e71a5a2007-06-09 10:11:16 -0400513 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
514 int nr = attr->index;
Jean Delvarebe8992c2005-05-16 19:00:52 +0200515 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[nr],
Guenter Roeck9004ac82012-01-15 06:38:23 -0800516 DIV_FROM_REG(data->fan_div[nr])));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700517}
Jean Delvare1e71a5a2007-06-09 10:11:16 -0400518static ssize_t show_fan_min(struct device *dev, struct device_attribute *da,
519 char *buf) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700520 struct via686a_data *data = via686a_update_device(dev);
Jean Delvare1e71a5a2007-06-09 10:11:16 -0400521 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
522 int nr = attr->index;
Jean Delvarebe8992c2005-05-16 19:00:52 +0200523 return sprintf(buf, "%d\n",
Guenter Roeck9004ac82012-01-15 06:38:23 -0800524 FAN_FROM_REG(data->fan_min[nr],
525 DIV_FROM_REG(data->fan_div[nr])));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700526}
Jean Delvare1e71a5a2007-06-09 10:11:16 -0400527static ssize_t show_fan_div(struct device *dev, struct device_attribute *da,
528 char *buf) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700529 struct via686a_data *data = via686a_update_device(dev);
Jean Delvare1e71a5a2007-06-09 10:11:16 -0400530 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
531 int nr = attr->index;
Guenter Roeck9004ac82012-01-15 06:38:23 -0800532 return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr]));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700533}
Jean Delvare1e71a5a2007-06-09 10:11:16 -0400534static ssize_t set_fan_min(struct device *dev, struct device_attribute *da,
535 const char *buf, size_t count) {
Jean Delvare2ec342e2007-06-09 10:11:16 -0400536 struct via686a_data *data = dev_get_drvdata(dev);
Jean Delvare1e71a5a2007-06-09 10:11:16 -0400537 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
538 int nr = attr->index;
Guenter Roeck9004ac82012-01-15 06:38:23 -0800539 unsigned long val;
540 int err;
541
542 err = kstrtoul(buf, 10, &val);
543 if (err)
544 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700545
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100546 mutex_lock(&data->update_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700547 data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr]));
Jean Delvare2ec342e2007-06-09 10:11:16 -0400548 via686a_write_value(data, VIA686A_REG_FAN_MIN(nr+1), data->fan_min[nr]);
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100549 mutex_unlock(&data->update_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700550 return count;
551}
Jean Delvare1e71a5a2007-06-09 10:11:16 -0400552static ssize_t set_fan_div(struct device *dev, struct device_attribute *da,
553 const char *buf, size_t count) {
Jean Delvare2ec342e2007-06-09 10:11:16 -0400554 struct via686a_data *data = dev_get_drvdata(dev);
Jean Delvare1e71a5a2007-06-09 10:11:16 -0400555 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
556 int nr = attr->index;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700557 int old;
Guenter Roeck9004ac82012-01-15 06:38:23 -0800558 unsigned long val;
559 int err;
560
561 err = kstrtoul(buf, 10, &val);
562 if (err)
563 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700564
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100565 mutex_lock(&data->update_lock);
Jean Delvare2ec342e2007-06-09 10:11:16 -0400566 old = via686a_read_value(data, VIA686A_REG_FANDIV);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700567 data->fan_div[nr] = DIV_TO_REG(val);
568 old = (old & 0x0f) | (data->fan_div[1] << 6) | (data->fan_div[0] << 4);
Jean Delvare2ec342e2007-06-09 10:11:16 -0400569 via686a_write_value(data, VIA686A_REG_FANDIV, old);
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100570 mutex_unlock(&data->update_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700571 return count;
572}
573
574#define show_fan_offset(offset) \
Jean Delvare1e71a5a2007-06-09 10:11:16 -0400575static SENSOR_DEVICE_ATTR(fan##offset##_input, S_IRUGO, \
576 show_fan, NULL, offset - 1); \
577static SENSOR_DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \
578 show_fan_min, set_fan_min, offset - 1); \
579static SENSOR_DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR, \
580 show_fan_div, set_fan_div, offset - 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700581
582show_fan_offset(1);
583show_fan_offset(2);
584
585/* Alarms */
Guenter Roeck9004ac82012-01-15 06:38:23 -0800586static ssize_t show_alarms(struct device *dev, struct device_attribute *attr,
587 char *buf)
588{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700589 struct via686a_data *data = via686a_update_device(dev);
Jean Delvare68188ba2005-05-16 18:52:38 +0200590 return sprintf(buf, "%u\n", data->alarms);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700591}
Guenter Roeck9004ac82012-01-15 06:38:23 -0800592
Jean Delvare1d66c642005-04-18 21:16:59 -0700593static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700594
Jean Delvare13ff05e2008-01-06 15:42:04 +0100595static ssize_t show_alarm(struct device *dev, struct device_attribute *attr,
596 char *buf)
597{
598 int bitnr = to_sensor_dev_attr(attr)->index;
599 struct via686a_data *data = via686a_update_device(dev);
600 return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1);
601}
602static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0);
603static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 1);
604static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 2);
605static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 3);
606static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 8);
607static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 4);
608static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 11);
609static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL, 15);
610static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 6);
611static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 7);
612
Jean Delvare2ec342e2007-06-09 10:11:16 -0400613static ssize_t show_name(struct device *dev, struct device_attribute
614 *devattr, char *buf)
615{
616 struct via686a_data *data = dev_get_drvdata(dev);
617 return sprintf(buf, "%s\n", data->name);
618}
619static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
620
Jean Delvarea5ebe662006-09-24 21:24:46 +0200621static struct attribute *via686a_attributes[] = {
Jean Delvare1e71a5a2007-06-09 10:11:16 -0400622 &sensor_dev_attr_in0_input.dev_attr.attr,
623 &sensor_dev_attr_in1_input.dev_attr.attr,
624 &sensor_dev_attr_in2_input.dev_attr.attr,
625 &sensor_dev_attr_in3_input.dev_attr.attr,
626 &sensor_dev_attr_in4_input.dev_attr.attr,
627 &sensor_dev_attr_in0_min.dev_attr.attr,
628 &sensor_dev_attr_in1_min.dev_attr.attr,
629 &sensor_dev_attr_in2_min.dev_attr.attr,
630 &sensor_dev_attr_in3_min.dev_attr.attr,
631 &sensor_dev_attr_in4_min.dev_attr.attr,
632 &sensor_dev_attr_in0_max.dev_attr.attr,
633 &sensor_dev_attr_in1_max.dev_attr.attr,
634 &sensor_dev_attr_in2_max.dev_attr.attr,
635 &sensor_dev_attr_in3_max.dev_attr.attr,
636 &sensor_dev_attr_in4_max.dev_attr.attr,
Jean Delvare13ff05e2008-01-06 15:42:04 +0100637 &sensor_dev_attr_in0_alarm.dev_attr.attr,
638 &sensor_dev_attr_in1_alarm.dev_attr.attr,
639 &sensor_dev_attr_in2_alarm.dev_attr.attr,
640 &sensor_dev_attr_in3_alarm.dev_attr.attr,
641 &sensor_dev_attr_in4_alarm.dev_attr.attr,
Jean Delvarea5ebe662006-09-24 21:24:46 +0200642
Jean Delvare1e71a5a2007-06-09 10:11:16 -0400643 &sensor_dev_attr_temp1_input.dev_attr.attr,
644 &sensor_dev_attr_temp2_input.dev_attr.attr,
645 &sensor_dev_attr_temp3_input.dev_attr.attr,
646 &sensor_dev_attr_temp1_max.dev_attr.attr,
647 &sensor_dev_attr_temp2_max.dev_attr.attr,
648 &sensor_dev_attr_temp3_max.dev_attr.attr,
649 &sensor_dev_attr_temp1_max_hyst.dev_attr.attr,
650 &sensor_dev_attr_temp2_max_hyst.dev_attr.attr,
651 &sensor_dev_attr_temp3_max_hyst.dev_attr.attr,
Jean Delvare13ff05e2008-01-06 15:42:04 +0100652 &sensor_dev_attr_temp1_alarm.dev_attr.attr,
653 &sensor_dev_attr_temp2_alarm.dev_attr.attr,
654 &sensor_dev_attr_temp3_alarm.dev_attr.attr,
Jean Delvarea5ebe662006-09-24 21:24:46 +0200655
Jean Delvare1e71a5a2007-06-09 10:11:16 -0400656 &sensor_dev_attr_fan1_input.dev_attr.attr,
657 &sensor_dev_attr_fan2_input.dev_attr.attr,
658 &sensor_dev_attr_fan1_min.dev_attr.attr,
659 &sensor_dev_attr_fan2_min.dev_attr.attr,
660 &sensor_dev_attr_fan1_div.dev_attr.attr,
661 &sensor_dev_attr_fan2_div.dev_attr.attr,
Jean Delvare13ff05e2008-01-06 15:42:04 +0100662 &sensor_dev_attr_fan1_alarm.dev_attr.attr,
663 &sensor_dev_attr_fan2_alarm.dev_attr.attr,
Jean Delvarea5ebe662006-09-24 21:24:46 +0200664
665 &dev_attr_alarms.attr,
Jean Delvare2ec342e2007-06-09 10:11:16 -0400666 &dev_attr_name.attr,
Jean Delvarea5ebe662006-09-24 21:24:46 +0200667 NULL
668};
669
670static const struct attribute_group via686a_group = {
671 .attrs = via686a_attributes,
672};
673
Jean Delvare2ec342e2007-06-09 10:11:16 -0400674static struct platform_driver via686a_driver = {
Laurent Riffardcdaf7932005-11-26 20:37:41 +0100675 .driver = {
Jean Delvare87218842006-09-03 22:36:14 +0200676 .owner = THIS_MODULE,
Laurent Riffardcdaf7932005-11-26 20:37:41 +0100677 .name = "via686a",
678 },
Jean Delvare2ec342e2007-06-09 10:11:16 -0400679 .probe = via686a_probe,
Bill Pemberton9e5e9b72012-11-19 13:21:20 -0500680 .remove = via686a_remove,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700681};
682
683
684/* This is called when the module is loaded */
Bill Pemberton6c931ae2012-11-19 13:22:35 -0500685static int via686a_probe(struct platform_device *pdev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700686{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700687 struct via686a_data *data;
Jean Delvare2ec342e2007-06-09 10:11:16 -0400688 struct resource *res;
689 int err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700690
691 /* Reserve the ISA region */
Jean Delvare2ec342e2007-06-09 10:11:16 -0400692 res = platform_get_resource(pdev, IORESOURCE_IO, 0);
Guenter Roeckfd55bc02012-06-02 11:35:54 -0700693 if (!devm_request_region(&pdev->dev, res->start, VIA686A_EXTENT,
694 via686a_driver.driver.name)) {
Jean Delvare2ec342e2007-06-09 10:11:16 -0400695 dev_err(&pdev->dev, "Region 0x%lx-0x%lx already in use!\n",
696 (unsigned long)res->start, (unsigned long)res->end);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700697 return -ENODEV;
698 }
699
Guenter Roeckfd55bc02012-06-02 11:35:54 -0700700 data = devm_kzalloc(&pdev->dev, sizeof(struct via686a_data),
701 GFP_KERNEL);
702 if (!data)
703 return -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700704
Jean Delvare2ec342e2007-06-09 10:11:16 -0400705 platform_set_drvdata(pdev, data);
706 data->addr = res->start;
707 data->name = "via686a";
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100708 mutex_init(&data->update_lock);
Jean Delvarebe8992c2005-05-16 19:00:52 +0200709
Linus Torvalds1da177e2005-04-16 15:20:36 -0700710 /* Initialize the VIA686A chip */
Jean Delvare2ec342e2007-06-09 10:11:16 -0400711 via686a_init_device(data);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700712
713 /* Register sysfs hooks */
Guenter Roeck9004ac82012-01-15 06:38:23 -0800714 err = sysfs_create_group(&pdev->dev.kobj, &via686a_group);
715 if (err)
Guenter Roeckfd55bc02012-06-02 11:35:54 -0700716 return err;
Jean Delvarea5ebe662006-09-24 21:24:46 +0200717
Tony Jones1beeffe2007-08-20 13:46:20 -0700718 data->hwmon_dev = hwmon_device_register(&pdev->dev);
719 if (IS_ERR(data->hwmon_dev)) {
720 err = PTR_ERR(data->hwmon_dev);
Jean Delvarea5ebe662006-09-24 21:24:46 +0200721 goto exit_remove_files;
Mark M. Hoffman943b0832005-07-15 21:39:18 -0400722 }
723
Linus Torvalds1da177e2005-04-16 15:20:36 -0700724 return 0;
725
Jean Delvarea5ebe662006-09-24 21:24:46 +0200726exit_remove_files:
Jean Delvare2ec342e2007-06-09 10:11:16 -0400727 sysfs_remove_group(&pdev->dev.kobj, &via686a_group);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700728 return err;
729}
730
Bill Pemberton281dfd02012-11-19 13:25:51 -0500731static int via686a_remove(struct platform_device *pdev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700732{
Jean Delvare2ec342e2007-06-09 10:11:16 -0400733 struct via686a_data *data = platform_get_drvdata(pdev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700734
Tony Jones1beeffe2007-08-20 13:46:20 -0700735 hwmon_device_unregister(data->hwmon_dev);
Jean Delvare2ec342e2007-06-09 10:11:16 -0400736 sysfs_remove_group(&pdev->dev.kobj, &via686a_group);
Mark M. Hoffman943b0832005-07-15 21:39:18 -0400737
Linus Torvalds1da177e2005-04-16 15:20:36 -0700738 return 0;
739}
740
Jean Delvaref7906742011-01-12 21:55:09 +0100741static void via686a_update_fan_div(struct via686a_data *data)
742{
743 int reg = via686a_read_value(data, VIA686A_REG_FANDIV);
744 data->fan_div[0] = (reg >> 4) & 0x03;
745 data->fan_div[1] = reg >> 6;
746}
747
Bill Pemberton6c931ae2012-11-19 13:22:35 -0500748static void via686a_init_device(struct via686a_data *data)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700749{
750 u8 reg;
751
752 /* Start monitoring */
Jean Delvare2ec342e2007-06-09 10:11:16 -0400753 reg = via686a_read_value(data, VIA686A_REG_CONFIG);
754 via686a_write_value(data, VIA686A_REG_CONFIG, (reg | 0x01) & 0x7F);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700755
756 /* Configure temp interrupt mode for continuous-interrupt operation */
Jean Delvare2ec342e2007-06-09 10:11:16 -0400757 reg = via686a_read_value(data, VIA686A_REG_TEMP_MODE);
758 via686a_write_value(data, VIA686A_REG_TEMP_MODE,
Jean Delvare58fe0802007-06-09 10:11:16 -0400759 (reg & ~VIA686A_TEMP_MODE_MASK)
760 | VIA686A_TEMP_MODE_CONTINUOUS);
Jean Delvaref7906742011-01-12 21:55:09 +0100761
762 /* Pre-read fan clock divisor values */
763 via686a_update_fan_div(data);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700764}
765
766static struct via686a_data *via686a_update_device(struct device *dev)
767{
Jean Delvare2ec342e2007-06-09 10:11:16 -0400768 struct via686a_data *data = dev_get_drvdata(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700769 int i;
770
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100771 mutex_lock(&data->update_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700772
773 if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
774 || !data->valid) {
775 for (i = 0; i <= 4; i++) {
776 data->in[i] =
Jean Delvare2ec342e2007-06-09 10:11:16 -0400777 via686a_read_value(data, VIA686A_REG_IN(i));
778 data->in_min[i] = via686a_read_value(data,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700779 VIA686A_REG_IN_MIN
780 (i));
781 data->in_max[i] =
Jean Delvare2ec342e2007-06-09 10:11:16 -0400782 via686a_read_value(data, VIA686A_REG_IN_MAX(i));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700783 }
784 for (i = 1; i <= 2; i++) {
785 data->fan[i - 1] =
Jean Delvare2ec342e2007-06-09 10:11:16 -0400786 via686a_read_value(data, VIA686A_REG_FAN(i));
787 data->fan_min[i - 1] = via686a_read_value(data,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700788 VIA686A_REG_FAN_MIN(i));
789 }
790 for (i = 0; i <= 2; i++) {
Jean Delvare2ec342e2007-06-09 10:11:16 -0400791 data->temp[i] = via686a_read_value(data,
Jean Delvare563db2f2005-05-17 22:38:57 +0200792 VIA686A_REG_TEMP[i]) << 2;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700793 data->temp_over[i] =
Jean Delvare2ec342e2007-06-09 10:11:16 -0400794 via686a_read_value(data,
Jean Delvare563db2f2005-05-17 22:38:57 +0200795 VIA686A_REG_TEMP_OVER[i]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700796 data->temp_hyst[i] =
Jean Delvare2ec342e2007-06-09 10:11:16 -0400797 via686a_read_value(data,
Jean Delvare563db2f2005-05-17 22:38:57 +0200798 VIA686A_REG_TEMP_HYST[i]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700799 }
Guenter Roeck9004ac82012-01-15 06:38:23 -0800800 /*
801 * add in lower 2 bits
802 * temp1 uses bits 7-6 of VIA686A_REG_TEMP_LOW1
803 * temp2 uses bits 5-4 of VIA686A_REG_TEMP_LOW23
804 * temp3 uses bits 7-6 of VIA686A_REG_TEMP_LOW23
Linus Torvalds1da177e2005-04-16 15:20:36 -0700805 */
Jean Delvare2ec342e2007-06-09 10:11:16 -0400806 data->temp[0] |= (via686a_read_value(data,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700807 VIA686A_REG_TEMP_LOW1)
808 & 0xc0) >> 6;
809 data->temp[1] |=
Jean Delvare2ec342e2007-06-09 10:11:16 -0400810 (via686a_read_value(data, VIA686A_REG_TEMP_LOW23) &
Linus Torvalds1da177e2005-04-16 15:20:36 -0700811 0x30) >> 4;
812 data->temp[2] |=
Jean Delvare2ec342e2007-06-09 10:11:16 -0400813 (via686a_read_value(data, VIA686A_REG_TEMP_LOW23) &
Linus Torvalds1da177e2005-04-16 15:20:36 -0700814 0xc0) >> 6;
815
Jean Delvaref7906742011-01-12 21:55:09 +0100816 via686a_update_fan_div(data);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700817 data->alarms =
Jean Delvare2ec342e2007-06-09 10:11:16 -0400818 via686a_read_value(data,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700819 VIA686A_REG_ALARM1) |
Jean Delvare2ec342e2007-06-09 10:11:16 -0400820 (via686a_read_value(data, VIA686A_REG_ALARM2) << 8);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700821 data->last_updated = jiffies;
822 data->valid = 1;
823 }
824
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100825 mutex_unlock(&data->update_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700826
827 return data;
828}
829
Frans Meulenbroeks600151b2012-01-05 19:50:17 +0100830static DEFINE_PCI_DEVICE_TABLE(via686a_pci_ids) = {
Jean Delvarebe8992c2005-05-16 19:00:52 +0200831 { PCI_DEVICE(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C686_4) },
Guenter Roeck9004ac82012-01-15 06:38:23 -0800832 { }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700833};
Linus Torvalds1da177e2005-04-16 15:20:36 -0700834MODULE_DEVICE_TABLE(pci, via686a_pci_ids);
835
Bill Pemberton6c931ae2012-11-19 13:22:35 -0500836static int via686a_device_add(unsigned short address)
Jean Delvare2ec342e2007-06-09 10:11:16 -0400837{
838 struct resource res = {
839 .start = address,
840 .end = address + VIA686A_EXTENT - 1,
841 .name = "via686a",
842 .flags = IORESOURCE_IO,
843 };
844 int err;
845
Jean Delvareb9acb642009-01-07 16:37:35 +0100846 err = acpi_check_resource_conflict(&res);
847 if (err)
848 goto exit;
849
Jean Delvare2ec342e2007-06-09 10:11:16 -0400850 pdev = platform_device_alloc("via686a", address);
851 if (!pdev) {
852 err = -ENOMEM;
Joe Perches774f7822010-10-20 06:51:51 +0000853 pr_err("Device allocation failed\n");
Jean Delvare2ec342e2007-06-09 10:11:16 -0400854 goto exit;
855 }
856
857 err = platform_device_add_resources(pdev, &res, 1);
858 if (err) {
Joe Perches774f7822010-10-20 06:51:51 +0000859 pr_err("Device resource addition failed (%d)\n", err);
Jean Delvare2ec342e2007-06-09 10:11:16 -0400860 goto exit_device_put;
861 }
862
863 err = platform_device_add(pdev);
864 if (err) {
Joe Perches774f7822010-10-20 06:51:51 +0000865 pr_err("Device addition failed (%d)\n", err);
Jean Delvare2ec342e2007-06-09 10:11:16 -0400866 goto exit_device_put;
867 }
868
869 return 0;
870
871exit_device_put:
872 platform_device_put(pdev);
873exit:
874 return err;
875}
876
Bill Pemberton6c931ae2012-11-19 13:22:35 -0500877static int via686a_pci_probe(struct pci_dev *dev,
Jean Delvarebe8992c2005-05-16 19:00:52 +0200878 const struct pci_device_id *id)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700879{
Jean Delvare2ec342e2007-06-09 10:11:16 -0400880 u16 address, val;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700881
Jean Delvare2ec342e2007-06-09 10:11:16 -0400882 if (force_addr) {
883 address = force_addr & ~(VIA686A_EXTENT - 1);
884 dev_warn(&dev->dev, "Forcing ISA address 0x%x\n", address);
885 if (PCIBIOS_SUCCESSFUL !=
886 pci_write_config_word(dev, VIA686A_BASE_REG, address | 1))
887 return -ENODEV;
888 }
Jean Delvarebe8992c2005-05-16 19:00:52 +0200889 if (PCIBIOS_SUCCESSFUL !=
890 pci_read_config_word(dev, VIA686A_BASE_REG, &val))
891 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700892
Jean Delvare2d8672c2005-07-19 23:56:35 +0200893 address = val & ~(VIA686A_EXTENT - 1);
Jean Delvare2ec342e2007-06-09 10:11:16 -0400894 if (address == 0) {
Jean Delvarebe8992c2005-05-16 19:00:52 +0200895 dev_err(&dev->dev, "base address not set - upgrade BIOS "
896 "or use force_addr=0xaddr\n");
897 return -ENODEV;
898 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700899
Jean Delvare2ec342e2007-06-09 10:11:16 -0400900 if (PCIBIOS_SUCCESSFUL !=
901 pci_read_config_word(dev, VIA686A_ENABLE_REG, &val))
902 return -ENODEV;
903 if (!(val & 0x0001)) {
904 if (!force_addr) {
905 dev_warn(&dev->dev, "Sensors disabled, enable "
906 "with force_addr=0x%x\n", address);
907 return -ENODEV;
908 }
909
910 dev_warn(&dev->dev, "Enabling sensors\n");
911 if (PCIBIOS_SUCCESSFUL !=
912 pci_write_config_word(dev, VIA686A_ENABLE_REG,
913 val | 0x0001))
914 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700915 }
916
Jean Delvare2ec342e2007-06-09 10:11:16 -0400917 if (platform_driver_register(&via686a_driver))
918 goto exit;
919
920 /* Sets global pdev as a side effect */
921 if (via686a_device_add(address))
922 goto exit_unregister;
923
Guenter Roeck9004ac82012-01-15 06:38:23 -0800924 /*
925 * Always return failure here. This is to allow other drivers to bind
Linus Torvalds1da177e2005-04-16 15:20:36 -0700926 * to this pci device. We don't really want to have control over the
927 * pci device, we only wanted to read as few register values from it.
928 */
Jean Delvare2ec342e2007-06-09 10:11:16 -0400929 s_bridge = pci_dev_get(dev);
930 return -ENODEV;
931
932exit_unregister:
933 platform_driver_unregister(&via686a_driver);
934exit:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700935 return -ENODEV;
936}
937
938static struct pci_driver via686a_pci_driver = {
Jean Delvarebe8992c2005-05-16 19:00:52 +0200939 .name = "via686a",
940 .id_table = via686a_pci_ids,
941 .probe = via686a_pci_probe,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700942};
943
944static int __init sm_via686a_init(void)
945{
Jean Delvarebe8992c2005-05-16 19:00:52 +0200946 return pci_register_driver(&via686a_pci_driver);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700947}
948
949static void __exit sm_via686a_exit(void)
950{
951 pci_unregister_driver(&via686a_pci_driver);
952 if (s_bridge != NULL) {
Jean Delvare2ec342e2007-06-09 10:11:16 -0400953 platform_device_unregister(pdev);
954 platform_driver_unregister(&via686a_driver);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700955 pci_dev_put(s_bridge);
956 s_bridge = NULL;
957 }
958}
959
Jan Engelhardt96de0e22007-10-19 23:21:04 +0200960MODULE_AUTHOR("Kyösti Mälkki <kmalkki@cc.hut.fi>, "
Jean Delvarebe8992c2005-05-16 19:00:52 +0200961 "Mark Studebaker <mdsxyz123@yahoo.com> "
962 "and Bob Dougherty <bobd@stanford.edu>");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700963MODULE_DESCRIPTION("VIA 686A Sensor device");
964MODULE_LICENSE("GPL");
965
966module_init(sm_via686a_init);
967module_exit(sm_via686a_exit);