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1da177e4
LT		 1/*
2 via686a.c - Part of lm_sensors, Linux kernel modules
6328c0e1 3 for hardware monitoring
be8992c2 4
1da177e4 5 Copyright (c) 1998 - 2002 Frodo Looijaard <frodol@dds.nl>,
96de0e25 6 Kyösti Mälkki <kmalkki@cc.hut.fi>,
1da177e4
LT		 7 Mark Studebaker <mdsxyz123@yahoo.com>,
8 and Bob Dougherty <bobd@stanford.edu>
be8992c2 9 (Some conversion-factor data were contributed by Jonathan Teh Soon Yew
1da177e4
LT		 10 <j.teh@iname.com> and Alex van Kaam <darkside@chello.nl>.)
11
12 This program is free software; you can redistribute it and/or modify
13 it under the terms of the GNU General Public License as published by
14 the Free Software Foundation; either version 2 of the License, or
15 (at your option) any later version.
16
17 This program is distributed in the hope that it will be useful,
18 but WITHOUT ANY WARRANTY; without even the implied warranty of
19 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 GNU General Public License for more details.
21
22 You should have received a copy of the GNU General Public License
23 along with this program; if not, write to the Free Software
24 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
25*/
26
27/*
28 Supports the Via VT82C686A, VT82C686B south bridges.
29 Reports all as a 686A.
30 Warning - only supports a single device.
31*/
32
1da177e4
LT		 33#include <linux/module.h>
34#include <linux/slab.h>
35#include <linux/pci.h>
1da177e4 36#include <linux/jiffies.h>
2ec342e6 37#include <linux/platform_device.h>
943b0830 38#include <linux/hwmon.h>
1e71a5a2 39#include <linux/hwmon-sysfs.h>
943b0830 40#include <linux/err.h>
1da177e4 41#include <linux/init.h>
9a61bf63 42#include <linux/mutex.h>
a5ebe668 43#include <linux/sysfs.h>
b9acb64a 44#include <linux/acpi.h>
6055fae8 45#include <linux/io.h>
1da177e4
LT		 46
47
48/* If force_addr is set to anything different from 0, we forcibly enable
49 the device at the given address. */
02002963 50static unsigned short force_addr;
1da177e4
LT		 51module_param(force_addr, ushort, 0);
52MODULE_PARM_DESC(force_addr,
53 "Initialize the base address of the sensors");
54
2ec342e6 55static struct platform_device *pdev;
1da177e4
LT		 56
57/*
58 The Via 686a southbridge has a LM78-like chip integrated on the same IC.
59 This driver is a customized copy of lm78.c
60*/
61
62/* Many VIA686A constants specified below */
63
64/* Length of ISA address segment */
be8992c2
JD		 65#define VIA686A_EXTENT 0x80
66#define VIA686A_BASE_REG 0x70
67#define VIA686A_ENABLE_REG 0x74
1da177e4
LT		 68
69/* The VIA686A registers */
70/* ins numbered 0-4 */
be8992c2
JD		 71#define VIA686A_REG_IN_MAX(nr) (0x2b + ((nr) * 2))
72#define VIA686A_REG_IN_MIN(nr) (0x2c + ((nr) * 2))
73#define VIA686A_REG_IN(nr) (0x22 + (nr))
1da177e4
LT		 74
75/* fans numbered 1-2 */
be8992c2
JD		 76#define VIA686A_REG_FAN_MIN(nr) (0x3a + (nr))
77#define VIA686A_REG_FAN(nr) (0x28 + (nr))
1da177e4 78
1da177e4 79/* temps numbered 1-3 */
563db2fe
JD		 80static const u8 VIA686A_REG_TEMP[] = { 0x20, 0x21, 0x1f };
81static const u8 VIA686A_REG_TEMP_OVER[] = { 0x39, 0x3d, 0x1d };
82static const u8 VIA686A_REG_TEMP_HYST[] = { 0x3a, 0x3e, 0x1e };
be8992c2
JD		 83/* bits 7-6 */
84#define VIA686A_REG_TEMP_LOW1 0x4b
85/* 2 = bits 5-4, 3 = bits 7-6 */
86#define VIA686A_REG_TEMP_LOW23 0x49
87
88#define VIA686A_REG_ALARM1 0x41
89#define VIA686A_REG_ALARM2 0x42
90#define VIA686A_REG_FANDIV 0x47
91#define VIA686A_REG_CONFIG 0x40
92/* The following register sets temp interrupt mode (bits 1-0 for temp1,
1da177e4
LT		 93 3-2 for temp2, 5-4 for temp3). Modes are:
94 00 interrupt stays as long as value is out-of-range
95 01 interrupt is cleared once register is read (default)
96 10 comparator mode- like 00, but ignores hysteresis
97 11 same as 00 */
be8992c2 98#define VIA686A_REG_TEMP_MODE 0x4b
1da177e4 99/* We'll just assume that you want to set all 3 simultaneously: */
be8992c2
JD		 100#define VIA686A_TEMP_MODE_MASK 0x3F
101#define VIA686A_TEMP_MODE_CONTINUOUS 0x00
1da177e4
LT		 102
103/* Conversions. Limit checking is only done on the TO_REG
be8992c2 104 variants.
1da177e4
LT		 105
106********* VOLTAGE CONVERSIONS (Bob Dougherty) ********
107 From HWMon.cpp (Copyright 1998-2000 Jonathan Teh Soon Yew):
108 voltagefactor[0]=1.25/2628; (2628/1.25=2102.4) // Vccp
109 voltagefactor[1]=1.25/2628; (2628/1.25=2102.4) // +2.5V
110 voltagefactor[2]=1.67/2628; (2628/1.67=1573.7) // +3.3V
111 voltagefactor[3]=2.6/2628; (2628/2.60=1010.8) // +5V
112 voltagefactor[4]=6.3/2628; (2628/6.30=417.14) // +12V
113 in[i]=(data[i+2]*25.0+133)*voltagefactor[i];
114 That is:
115 volts = (25*regVal+133)*factor
116 regVal = (volts/factor-133)/25
be8992c2 117 (These conversions were contributed by Jonathan Teh Soon Yew
1da177e4
LT		 118 <j.teh@iname.com>) */
119static inline u8 IN_TO_REG(long val, int inNum)
120{
121 /* To avoid floating point, we multiply constants by 10 (100 for +12V).
122 Rounding is done (120500 is actually 133000 - 12500).
123 Remember that val is expressed in 0.001V/bit, which is why we divide
124 by an additional 10000 (100000 for +12V): 1000 for val and 10 (100)
125 for the constants. */
126 if (inNum <= 1)
127 return (u8)
128 SENSORS_LIMIT((val * 21024 - 1205000) / 250000, 0, 255);
129 else if (inNum == 2)
130 return (u8)
131 SENSORS_LIMIT((val * 15737 - 1205000) / 250000, 0, 255);
132 else if (inNum == 3)
133 return (u8)
134 SENSORS_LIMIT((val * 10108 - 1205000) / 250000, 0, 255);
135 else
136 return (u8)
137 SENSORS_LIMIT((val * 41714 - 12050000) / 2500000, 0, 255);
138}
139
140static inline long IN_FROM_REG(u8 val, int inNum)
141{
142 /* To avoid floating point, we multiply constants by 10 (100 for +12V).
143 We also multiply them by 1000 because we want 0.001V/bit for the
144 output value. Rounding is done. */
145 if (inNum <= 1)
146 return (long) ((250000 * val + 1330000 + 21024 / 2) / 21024);
147 else if (inNum == 2)
148 return (long) ((250000 * val + 1330000 + 15737 / 2) / 15737);
149 else if (inNum == 3)
150 return (long) ((250000 * val + 1330000 + 10108 / 2) / 10108);
151 else
152 return (long) ((2500000 * val + 13300000 + 41714 / 2) / 41714);
153}
154
155/********* FAN RPM CONVERSIONS ********/
156/* Higher register values = slower fans (the fan's strobe gates a counter).
157 But this chip saturates back at 0, not at 255 like all the other chips.
158 So, 0 means 0 RPM */
159static inline u8 FAN_TO_REG(long rpm, int div)
160{
161 if (rpm == 0)
162 return 0;
163 rpm = SENSORS_LIMIT(rpm, 1, 1000000);
164 return SENSORS_LIMIT((1350000 + rpm * div / 2) / (rpm * div), 1, 255);
165}
166
167#define FAN_FROM_REG(val,div) ((val)==0?0:(val)==255?0:1350000/((val)*(div)))
168
169/******** TEMP CONVERSIONS (Bob Dougherty) *********/
170/* linear fits from HWMon.cpp (Copyright 1998-2000 Jonathan Teh Soon Yew)
171 if(temp<169)
6328c0e1 172 return double(temp)*0.427-32.08;
1da177e4 173 else if(temp>=169 && temp<=202)
6328c0e1 174 return double(temp)*0.582-58.16;
1da177e4 175 else
6328c0e1 176 return double(temp)*0.924-127.33;
1da177e4 177
be8992c2
JD		 178 A fifth-order polynomial fits the unofficial data (provided by Alex van
179 Kaam <darkside@chello.nl>) a bit better. It also give more reasonable
180 numbers on my machine (ie. they agree with what my BIOS tells me).
1da177e4 181 Here's the fifth-order fit to the 8-bit data:
be8992c2 182 temp = 1.625093e-10*val^5 - 1.001632e-07*val^4 + 2.457653e-05*val^3 -
6328c0e1 183 2.967619e-03*val^2 + 2.175144e-01*val - 7.090067e+0.
1da177e4 184
be8992c2 185 (2000-10-25- RFD: thanks to Uwe Andersen <uandersen@mayah.com> for
1da177e4
LT		 186 finding my typos in this formula!)
187
be8992c2
JD		 188 Alas, none of the elegant function-fit solutions will work because we
189 aren't allowed to use floating point in the kernel and doing it with
190 integers doesn't provide enough precision. So we'll do boring old
191 look-up table stuff. The unofficial data (see below) have effectively
192 7-bit resolution (they are rounded to the nearest degree). I'm assuming
193 that the transfer function of the device is monotonic and smooth, so a
194 smooth function fit to the data will allow us to get better precision.
1da177e4 195 I used the 5th-order poly fit described above and solved for
be8992c2
JD		 196 VIA register values 0-255. I *10 before rounding, so we get tenth-degree
197 precision. (I could have done all 1024 values for our 10-bit readings,
198 but the function is very linear in the useful range (0-80 deg C), so
199 we'll just use linear interpolation for 10-bit readings.) So, tempLUT
1da177e4 200 is the temp at via register values 0-255: */
088341bd 201static const s16 tempLUT[] =
be8992c2
JD		 202{ -709, -688, -667, -646, -627, -607, -589, -570, -553, -536, -519,
203 -503, -487, -471, -456, -442, -428, -414, -400, -387, -375,
204 -362, -350, -339, -327, -316, -305, -295, -285, -275, -265,
205 -255, -246, -237, -229, -220, -212, -204, -196, -188, -180,
206 -173, -166, -159, -152, -145, -139, -132, -126, -120, -114,
207 -108, -102, -96, -91, -85, -80, -74, -69, -64, -59, -54, -49,
208 -44, -39, -34, -29, -25, -20, -15, -11, -6, -2, 3, 7, 12, 16,
209 20, 25, 29, 33, 37, 42, 46, 50, 54, 59, 63, 67, 71, 75, 79, 84,
210 88, 92, 96, 100, 104, 109, 113, 117, 121, 125, 130, 134, 138,
211 142, 146, 151, 155, 159, 163, 168, 172, 176, 181, 185, 189,
212 193, 198, 202, 206, 211, 215, 219, 224, 228, 232, 237, 241,
213 245, 250, 254, 259, 263, 267, 272, 276, 281, 285, 290, 294,
214 299, 303, 307, 312, 316, 321, 325, 330, 334, 339, 344, 348,
215 353, 357, 362, 366, 371, 376, 380, 385, 390, 395, 399, 404,
216 409, 414, 419, 423, 428, 433, 438, 443, 449, 454, 459, 464,
217 469, 475, 480, 486, 491, 497, 502, 508, 514, 520, 526, 532,
218 538, 544, 551, 557, 564, 571, 578, 584, 592, 599, 606, 614,
219 621, 629, 637, 645, 654, 662, 671, 680, 689, 698, 708, 718,
220 728, 738, 749, 759, 770, 782, 793, 805, 818, 830, 843, 856,
221 870, 883, 898, 912, 927, 943, 958, 975, 991, 1008, 1026, 1044,
222 1062, 1081, 1101, 1121, 1141, 1162, 1184, 1206, 1229, 1252,
223 1276, 1301, 1326, 1352, 1378, 1406, 1434, 1462
1da177e4
LT		 224};
225
be8992c2 226/* the original LUT values from Alex van Kaam <darkside@chello.nl>
1da177e4
LT		 227 (for via register values 12-240):
228{-50,-49,-47,-45,-43,-41,-39,-38,-37,-35,-34,-33,-32,-31,
229-30,-29,-28,-27,-26,-25,-24,-24,-23,-22,-21,-20,-20,-19,-18,-17,-17,-16,-15,
230-15,-14,-14,-13,-12,-12,-11,-11,-10,-9,-9,-8,-8,-7,-7,-6,-6,-5,-5,-4,-4,-3,
231-3,-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,
23212,12,13,13,13,14,14,15,15,16,16,16,17,17,18,18,19,19,20,20,21,21,21,22,22,
23322,23,23,24,24,25,25,26,26,26,27,27,27,28,28,29,29,30,30,30,31,31,32,32,33,
23433,34,34,35,35,35,36,36,37,37,38,38,39,39,40,40,41,41,42,42,43,43,44,44,45,
23545,46,46,47,48,48,49,49,50,51,51,52,52,53,53,54,55,55,56,57,57,58,59,59,60,
23661,62,62,63,64,65,66,66,67,68,69,70,71,72,73,74,75,76,77,78,79,80,81,83,84,
23785,86,88,89,91,92,94,96,97,99,101,103,105,107,109,110};
238
239
240 Here's the reverse LUT. I got it by doing a 6-th order poly fit (needed
be8992c2
JD		 241 an extra term for a good fit to these inverse data!) and then
242 solving for each temp value from -50 to 110 (the useable range for
243 this chip). Here's the fit:
244 viaRegVal = -1.160370e-10*val^6 +3.193693e-08*val^5 - 1.464447e-06*val^4
1da177e4
LT		 245 - 2.525453e-04*val^3 + 1.424593e-02*val^2 + 2.148941e+00*val +7.275808e+01)
246 Note that n=161: */
247static const u8 viaLUT[] =
be8992c2
JD		 248{ 12, 12, 13, 14, 14, 15, 16, 16, 17, 18, 18, 19, 20, 20, 21, 22, 23,
249 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 35, 36, 37, 39, 40,
250 41, 43, 45, 46, 48, 49, 51, 53, 55, 57, 59, 60, 62, 64, 66,
251 69, 71, 73, 75, 77, 79, 82, 84, 86, 88, 91, 93, 95, 98, 100,
252 103, 105, 107, 110, 112, 115, 117, 119, 122, 124, 126, 129,
253 131, 134, 136, 138, 140, 143, 145, 147, 150, 152, 154, 156,
254 158, 160, 162, 164, 166, 168, 170, 172, 174, 176, 178, 180,
255 182, 183, 185, 187, 188, 190, 192, 193, 195, 196, 198, 199,
256 200, 202, 203, 205, 206, 207, 208, 209, 210, 211, 212, 213,
257 214, 215, 216, 217, 218, 219, 220, 221, 222, 222, 223, 224,
258 225, 226, 226, 227, 228, 228, 229, 230, 230, 231, 232, 232,
259 233, 233, 234, 235, 235, 236, 236, 237, 237, 238, 238, 239,
260 239, 240
1da177e4
LT		 261};
262
263/* Converting temps to (8-bit) hyst and over registers
264 No interpolation here.
265 The +50 is because the temps start at -50 */
266static inline u8 TEMP_TO_REG(long val)
267{
be8992c2 268 return viaLUT[val <= -50000 ? 0 : val >= 110000 ? 160 :
1da177e4
LT		 269 (val < 0 ? val - 500 : val + 500) / 1000 + 50];
270}
271
272/* for 8-bit temperature hyst and over registers */
088341bd 273#define TEMP_FROM_REG(val) ((long)tempLUT[val] * 100)
1da177e4
LT		 274
275/* for 10-bit temperature readings */
276static inline long TEMP_FROM_REG10(u16 val)
277{
278 u16 eightBits = val >> 2;
279 u16 twoBits = val & 3;
280
281 /* no interpolation for these */
282 if (twoBits == 0 || eightBits == 255)
283 return TEMP_FROM_REG(eightBits);
284
285 /* do some linear interpolation */
286 return (tempLUT[eightBits] * (4 - twoBits) +
be8992c2 287 tempLUT[eightBits + 1] * twoBits) * 25;
1da177e4
LT		 288}
289
1da177e4
LT		 290#define DIV_FROM_REG(val) (1 << (val))
291#define DIV_TO_REG(val) ((val)==8?3:(val)==4?2:(val)==1?0:1)
292
ed6bafbf
JD		 293/* For each registered chip, we need to keep some data in memory.
294 The structure is dynamically allocated. */
1da177e4 295struct via686a_data {
2ec342e6
JD		 296 unsigned short addr;
297 const char *name;
1beeffe4 298 struct device *hwmon_dev;
9a61bf63 299 struct mutex update_lock;
1da177e4
LT		 300 char valid; /* !=0 if following fields are valid */
301 unsigned long last_updated; /* In jiffies */
302
303 u8 in[5]; /* Register value */
304 u8 in_max[5]; /* Register value */
305 u8 in_min[5]; /* Register value */
306 u8 fan[2]; /* Register value */
307 u8 fan_min[2]; /* Register value */
308 u16 temp[3]; /* Register value 10 bit */
309 u8 temp_over[3]; /* Register value */
310 u8 temp_hyst[3]; /* Register value */
311 u8 fan_div[2]; /* Register encoding, shifted right */
312 u16 alarms; /* Register encoding, combined */
313};
314
315static struct pci_dev *s_bridge; /* pointer to the (only) via686a */
316
2ec342e6 317static int via686a_probe(struct platform_device *pdev);
d0546128 318static int __devexit via686a_remove(struct platform_device *pdev);
1da177e4 319
2ec342e6 320static inline int via686a_read_value(struct via686a_data *data, u8 reg)
1da177e4 321{
2ec342e6 322 return inb_p(data->addr + reg);
1da177e4
LT		 323}
324
2ec342e6 325static inline void via686a_write_value(struct via686a_data *data, u8 reg,
1da177e4
LT		 326 u8 value)
327{
2ec342e6 328 outb_p(value, data->addr + reg);
1da177e4
LT		 329}
330
331static struct via686a_data *via686a_update_device(struct device *dev);
2ec342e6 332static void via686a_init_device(struct via686a_data *data);
1da177e4
LT		 333
334/* following are the sysfs callback functions */
335
336/* 7 voltage sensors */
1e71a5a2
JD		 337static ssize_t show_in(struct device *dev, struct device_attribute *da,
338 char *buf) {
1da177e4 339 struct via686a_data *data = via686a_update_device(dev);
1e71a5a2
JD		 340 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
341 int nr = attr->index;
1da177e4
LT		 342 return sprintf(buf, "%ld\n", IN_FROM_REG(data->in[nr], nr));
343}
344
1e71a5a2
JD		 345static ssize_t show_in_min(struct device *dev, struct device_attribute *da,
346 char *buf) {
1da177e4 347 struct via686a_data *data = via686a_update_device(dev);
1e71a5a2
JD		 348 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
349 int nr = attr->index;
1da177e4
LT		 350 return sprintf(buf, "%ld\n", IN_FROM_REG(data->in_min[nr], nr));
351}
352
1e71a5a2
JD		 353static ssize_t show_in_max(struct device *dev, struct device_attribute *da,
354 char *buf) {
1da177e4 355 struct via686a_data *data = via686a_update_device(dev);
1e71a5a2
JD		 356 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
357 int nr = attr->index;
1da177e4
LT		 358 return sprintf(buf, "%ld\n", IN_FROM_REG(data->in_max[nr], nr));
359}
360
1e71a5a2
JD		 361static ssize_t set_in_min(struct device *dev, struct device_attribute *da,
362 const char *buf, size_t count) {
2ec342e6 363 struct via686a_data *data = dev_get_drvdata(dev);
1e71a5a2
JD		 364 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
365 int nr = attr->index;
1da177e4
LT		 366 unsigned long val = simple_strtoul(buf, NULL, 10);
367
9a61bf63 368 mutex_lock(&data->update_lock);
be8992c2 369 data->in_min[nr] = IN_TO_REG(val, nr);
2ec342e6 370 via686a_write_value(data, VIA686A_REG_IN_MIN(nr),
1da177e4 371 data->in_min[nr]);
9a61bf63 372 mutex_unlock(&data->update_lock);
1da177e4
LT		 373 return count;
374}
1e71a5a2
JD		 375static ssize_t set_in_max(struct device *dev, struct device_attribute *da,
376 const char *buf, size_t count) {
2ec342e6 377 struct via686a_data *data = dev_get_drvdata(dev);
1e71a5a2
JD		 378 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
379 int nr = attr->index;
1da177e4
LT		 380 unsigned long val = simple_strtoul(buf, NULL, 10);
381
9a61bf63 382 mutex_lock(&data->update_lock);
be8992c2 383 data->in_max[nr] = IN_TO_REG(val, nr);
2ec342e6 384 via686a_write_value(data, VIA686A_REG_IN_MAX(nr),
1da177e4 385 data->in_max[nr]);
9a61bf63 386 mutex_unlock(&data->update_lock);
1da177e4
LT		 387 return count;
388}
389#define show_in_offset(offset) \
1e71a5a2
JD		 390static SENSOR_DEVICE_ATTR(in##offset##_input, S_IRUGO, \
391 show_in, NULL, offset); \
392static SENSOR_DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \
393 show_in_min, set_in_min, offset); \
394static SENSOR_DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \
395 show_in_max, set_in_max, offset);
1da177e4
LT		 396
397show_in_offset(0);
398show_in_offset(1);
399show_in_offset(2);
400show_in_offset(3);
401show_in_offset(4);
402
403/* 3 temperatures */
1e71a5a2
JD		 404static ssize_t show_temp(struct device *dev, struct device_attribute *da,
405 char *buf) {
1da177e4 406 struct via686a_data *data = via686a_update_device(dev);
1e71a5a2
JD		 407 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
408 int nr = attr->index;
1da177e4
LT		 409 return sprintf(buf, "%ld\n", TEMP_FROM_REG10(data->temp[nr]));
410}
1e71a5a2
JD		 411static ssize_t show_temp_over(struct device *dev, struct device_attribute *da,
412 char *buf) {
1da177e4 413 struct via686a_data *data = via686a_update_device(dev);
1e71a5a2
JD		 414 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
415 int nr = attr->index;
1da177e4
LT		 416 return sprintf(buf, "%ld\n", TEMP_FROM_REG(data->temp_over[nr]));
417}
1e71a5a2
JD		 418static ssize_t show_temp_hyst(struct device *dev, struct device_attribute *da,
419 char *buf) {
1da177e4 420 struct via686a_data *data = via686a_update_device(dev);
1e71a5a2
JD		 421 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
422 int nr = attr->index;
1da177e4
LT		 423 return sprintf(buf, "%ld\n", TEMP_FROM_REG(data->temp_hyst[nr]));
424}
1e71a5a2
JD		 425static ssize_t set_temp_over(struct device *dev, struct device_attribute *da,
426 const char *buf, size_t count) {
2ec342e6 427 struct via686a_data *data = dev_get_drvdata(dev);
1e71a5a2
JD		 428 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
429 int nr = attr->index;
1da177e4
LT		 430 int val = simple_strtol(buf, NULL, 10);
431
9a61bf63 432 mutex_lock(&data->update_lock);
1da177e4 433 data->temp_over[nr] = TEMP_TO_REG(val);
2ec342e6 434 via686a_write_value(data, VIA686A_REG_TEMP_OVER[nr],
563db2fe 435 data->temp_over[nr]);
9a61bf63 436 mutex_unlock(&data->update_lock);
1da177e4
LT		 437 return count;
438}
1e71a5a2
JD		 439static ssize_t set_temp_hyst(struct device *dev, struct device_attribute *da,
440 const char *buf, size_t count) {
2ec342e6 441 struct via686a_data *data = dev_get_drvdata(dev);
1e71a5a2
JD		 442 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
443 int nr = attr->index;
1da177e4
LT		 444 int val = simple_strtol(buf, NULL, 10);
445
9a61bf63 446 mutex_lock(&data->update_lock);
1da177e4 447 data->temp_hyst[nr] = TEMP_TO_REG(val);
2ec342e6 448 via686a_write_value(data, VIA686A_REG_TEMP_HYST[nr],
563db2fe 449 data->temp_hyst[nr]);
9a61bf63 450 mutex_unlock(&data->update_lock);
1da177e4
LT		 451 return count;
452}
453#define show_temp_offset(offset) \
1e71a5a2
JD		 454static SENSOR_DEVICE_ATTR(temp##offset##_input, S_IRUGO, \
455 show_temp, NULL, offset - 1); \
456static SENSOR_DEVICE_ATTR(temp##offset##_max, S_IRUGO | S_IWUSR, \
457 show_temp_over, set_temp_over, offset - 1); \
458static SENSOR_DEVICE_ATTR(temp##offset##_max_hyst, S_IRUGO | S_IWUSR, \
459 show_temp_hyst, set_temp_hyst, offset - 1);
1da177e4
LT		 460
461show_temp_offset(1);
462show_temp_offset(2);
463show_temp_offset(3);
464
465/* 2 Fans */
1e71a5a2
JD		 466static ssize_t show_fan(struct device *dev, struct device_attribute *da,
467 char *buf) {
1da177e4 468 struct via686a_data *data = via686a_update_device(dev);
1e71a5a2
JD		 469 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
470 int nr = attr->index;
be8992c2 471 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[nr],
1da177e4
LT		 472 DIV_FROM_REG(data->fan_div[nr])) );
473}
1e71a5a2
JD		 474static ssize_t show_fan_min(struct device *dev, struct device_attribute *da,
475 char *buf) {
1da177e4 476 struct via686a_data *data = via686a_update_device(dev);
1e71a5a2
JD		 477 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
478 int nr = attr->index;
be8992c2 479 return sprintf(buf, "%d\n",
1da177e4
LT		 480 FAN_FROM_REG(data->fan_min[nr], DIV_FROM_REG(data->fan_div[nr])) );
481}
1e71a5a2
JD		 482static ssize_t show_fan_div(struct device *dev, struct device_attribute *da,
483 char *buf) {
1da177e4 484 struct via686a_data *data = via686a_update_device(dev);
1e71a5a2
JD		 485 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
486 int nr = attr->index;
be8992c2 487 return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr]) );
1da177e4 488}
1e71a5a2
JD		 489static ssize_t set_fan_min(struct device *dev, struct device_attribute *da,
490 const char *buf, size_t count) {
2ec342e6 491 struct via686a_data *data = dev_get_drvdata(dev);
1e71a5a2
JD		 492 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
493 int nr = attr->index;
1da177e4
LT		 494 int val = simple_strtol(buf, NULL, 10);
495
9a61bf63 496 mutex_lock(&data->update_lock);
1da177e4 497 data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr]));
2ec342e6 498 via686a_write_value(data, VIA686A_REG_FAN_MIN(nr+1), data->fan_min[nr]);
9a61bf63 499 mutex_unlock(&data->update_lock);
1da177e4
LT		 500 return count;
501}
1e71a5a2
JD		 502static ssize_t set_fan_div(struct device *dev, struct device_attribute *da,
503 const char *buf, size_t count) {
2ec342e6 504 struct via686a_data *data = dev_get_drvdata(dev);
1e71a5a2
JD		 505 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
506 int nr = attr->index;
1da177e4
LT		 507 int val = simple_strtol(buf, NULL, 10);
508 int old;
509
9a61bf63 510 mutex_lock(&data->update_lock);
2ec342e6 511 old = via686a_read_value(data, VIA686A_REG_FANDIV);
1da177e4
LT		 512 data->fan_div[nr] = DIV_TO_REG(val);
513 old = (old & 0x0f) | (data->fan_div[1] << 6) | (data->fan_div[0] << 4);
2ec342e6 514 via686a_write_value(data, VIA686A_REG_FANDIV, old);
9a61bf63 515 mutex_unlock(&data->update_lock);
1da177e4
LT		 516 return count;
517}
518
519#define show_fan_offset(offset) \
1e71a5a2
JD		 520static SENSOR_DEVICE_ATTR(fan##offset##_input, S_IRUGO, \
521 show_fan, NULL, offset - 1); \
522static SENSOR_DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \
523 show_fan_min, set_fan_min, offset - 1); \
524static SENSOR_DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR, \
525 show_fan_div, set_fan_div, offset - 1);
1da177e4
LT		 526
527show_fan_offset(1);
528show_fan_offset(2);
529
530/* Alarms */
a5099cfc 531static ssize_t show_alarms(struct device *dev, struct device_attribute *attr, char *buf) {
1da177e4 532 struct via686a_data *data = via686a_update_device(dev);
68188ba7 533 return sprintf(buf, "%u\n", data->alarms);
1da177e4 534}
1d66c64c 535static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
1da177e4 536
13ff05e9
JD		 537static ssize_t show_alarm(struct device *dev, struct device_attribute *attr,
538 char *buf)
539{
540 int bitnr = to_sensor_dev_attr(attr)->index;
541 struct via686a_data *data = via686a_update_device(dev);
542 return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1);
543}
544static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0);
545static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 1);
546static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 2);
547static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 3);
548static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 8);
549static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 4);
550static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 11);
551static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL, 15);
552static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 6);
553static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 7);
554
2ec342e6
JD		 555static ssize_t show_name(struct device *dev, struct device_attribute
556 *devattr, char *buf)
557{
558 struct via686a_data *data = dev_get_drvdata(dev);
559 return sprintf(buf, "%s\n", data->name);
560}
561static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
562
a5ebe668 563static struct attribute *via686a_attributes[] = {
1e71a5a2
JD		 564 &sensor_dev_attr_in0_input.dev_attr.attr,
565 &sensor_dev_attr_in1_input.dev_attr.attr,
566 &sensor_dev_attr_in2_input.dev_attr.attr,
567 &sensor_dev_attr_in3_input.dev_attr.attr,
568 &sensor_dev_attr_in4_input.dev_attr.attr,
569 &sensor_dev_attr_in0_min.dev_attr.attr,
570 &sensor_dev_attr_in1_min.dev_attr.attr,
571 &sensor_dev_attr_in2_min.dev_attr.attr,
572 &sensor_dev_attr_in3_min.dev_attr.attr,
573 &sensor_dev_attr_in4_min.dev_attr.attr,
574 &sensor_dev_attr_in0_max.dev_attr.attr,
575 &sensor_dev_attr_in1_max.dev_attr.attr,
576 &sensor_dev_attr_in2_max.dev_attr.attr,
577 &sensor_dev_attr_in3_max.dev_attr.attr,
578 &sensor_dev_attr_in4_max.dev_attr.attr,
13ff05e9
JD		 579 &sensor_dev_attr_in0_alarm.dev_attr.attr,
580 &sensor_dev_attr_in1_alarm.dev_attr.attr,
581 &sensor_dev_attr_in2_alarm.dev_attr.attr,
582 &sensor_dev_attr_in3_alarm.dev_attr.attr,
583 &sensor_dev_attr_in4_alarm.dev_attr.attr,
1e71a5a2
JD		 584
585 &sensor_dev_attr_temp1_input.dev_attr.attr,
586 &sensor_dev_attr_temp2_input.dev_attr.attr,
587 &sensor_dev_attr_temp3_input.dev_attr.attr,
588 &sensor_dev_attr_temp1_max.dev_attr.attr,
589 &sensor_dev_attr_temp2_max.dev_attr.attr,
590 &sensor_dev_attr_temp3_max.dev_attr.attr,
591 &sensor_dev_attr_temp1_max_hyst.dev_attr.attr,
592 &sensor_dev_attr_temp2_max_hyst.dev_attr.attr,
593 &sensor_dev_attr_temp3_max_hyst.dev_attr.attr,
13ff05e9
JD		 594 &sensor_dev_attr_temp1_alarm.dev_attr.attr,
595 &sensor_dev_attr_temp2_alarm.dev_attr.attr,
596 &sensor_dev_attr_temp3_alarm.dev_attr.attr,
1e71a5a2
JD		 597
598 &sensor_dev_attr_fan1_input.dev_attr.attr,
599 &sensor_dev_attr_fan2_input.dev_attr.attr,
600 &sensor_dev_attr_fan1_min.dev_attr.attr,
601 &sensor_dev_attr_fan2_min.dev_attr.attr,
602 &sensor_dev_attr_fan1_div.dev_attr.attr,
603 &sensor_dev_attr_fan2_div.dev_attr.attr,
13ff05e9
JD		 604 &sensor_dev_attr_fan1_alarm.dev_attr.attr,
605 &sensor_dev_attr_fan2_alarm.dev_attr.attr,
a5ebe668
JD		 606
607 &dev_attr_alarms.attr,
2ec342e6 608 &dev_attr_name.attr,
a5ebe668
JD		 609 NULL
610};
611
612static const struct attribute_group via686a_group = {
613 .attrs = via686a_attributes,
614};
615
2ec342e6 616static struct platform_driver via686a_driver = {
cdaf7934 617 .driver = {
87218842 618 .owner = THIS_MODULE,
cdaf7934
LR		 619 .name = "via686a",
620 },
2ec342e6
JD		 621 .probe = via686a_probe,
622 .remove = __devexit_p(via686a_remove),
1da177e4
LT		 623};
624
625
626/* This is called when the module is loaded */
2ec342e6 627static int __devinit via686a_probe(struct platform_device *pdev)
1da177e4 628{
1da177e4 629 struct via686a_data *data;
2ec342e6
JD		 630 struct resource *res;
631 int err;
1da177e4
LT		 632
633 /* Reserve the ISA region */
2ec342e6
JD		 634 res = platform_get_resource(pdev, IORESOURCE_IO, 0);
635 if (!request_region(res->start, VIA686A_EXTENT,
cdaf7934 636 via686a_driver.driver.name)) {
2ec342e6
JD		 637 dev_err(&pdev->dev, "Region 0x%lx-0x%lx already in use!\n",
638 (unsigned long)res->start, (unsigned long)res->end);
1da177e4
LT		 639 return -ENODEV;
640 }
641
ba9c2e8d 642 if (!(data = kzalloc(sizeof(struct via686a_data), GFP_KERNEL))) {
1da177e4 643 err = -ENOMEM;
943b0830 644 goto exit_release;
1da177e4 645 }
1da177e4 646
2ec342e6
JD		 647 platform_set_drvdata(pdev, data);
648 data->addr = res->start;
649 data->name = "via686a";
9a61bf63 650 mutex_init(&data->update_lock);
be8992c2 651
1da177e4 652 /* Initialize the VIA686A chip */
2ec342e6 653 via686a_init_device(data);
1da177e4
LT		 654
655 /* Register sysfs hooks */
2ec342e6
JD		 656 if ((err = sysfs_create_group(&pdev->dev.kobj, &via686a_group)))
657 goto exit_free;
a5ebe668 658
1beeffe4
TJ		 659 data->hwmon_dev = hwmon_device_register(&pdev->dev);
660 if (IS_ERR(data->hwmon_dev)) {
661 err = PTR_ERR(data->hwmon_dev);
a5ebe668 662 goto exit_remove_files;
943b0830
MH		 663 }
664
1da177e4
LT		 665 return 0;
666
a5ebe668 667exit_remove_files:
2ec342e6 668 sysfs_remove_group(&pdev->dev.kobj, &via686a_group);
943b0830 669exit_free:
1da177e4 670 kfree(data);
943b0830 671exit_release:
2ec342e6 672 release_region(res->start, VIA686A_EXTENT);
1da177e4
LT		 673 return err;
674}
675
2ec342e6 676static int __devexit via686a_remove(struct platform_device *pdev)
1da177e4 677{
2ec342e6 678 struct via686a_data *data = platform_get_drvdata(pdev);
1da177e4 679
1beeffe4 680 hwmon_device_unregister(data->hwmon_dev);
2ec342e6 681 sysfs_remove_group(&pdev->dev.kobj, &via686a_group);
943b0830 682
2ec342e6
JD		 683 release_region(data->addr, VIA686A_EXTENT);
684 platform_set_drvdata(pdev, NULL);
943b0830 685 kfree(data);
1da177e4
LT		 686
687 return 0;
688}
689
2ec342e6 690static void __devinit via686a_init_device(struct via686a_data *data)
1da177e4
LT		 691{
692 u8 reg;
693
694 /* Start monitoring */
2ec342e6
JD		 695 reg = via686a_read_value(data, VIA686A_REG_CONFIG);
696 via686a_write_value(data, VIA686A_REG_CONFIG, (reg | 0x01) & 0x7F);
1da177e4
LT		 697
698 /* Configure temp interrupt mode for continuous-interrupt operation */
2ec342e6
JD		 699 reg = via686a_read_value(data, VIA686A_REG_TEMP_MODE);
700 via686a_write_value(data, VIA686A_REG_TEMP_MODE,
58fe0809
JD		 701 (reg & ~VIA686A_TEMP_MODE_MASK)
702 | VIA686A_TEMP_MODE_CONTINUOUS);
1da177e4
LT		 703}
704
705static struct via686a_data *via686a_update_device(struct device *dev)
706{
2ec342e6 707 struct via686a_data *data = dev_get_drvdata(dev);
1da177e4
LT		 708 int i;
709
9a61bf63 710 mutex_lock(&data->update_lock);
1da177e4
LT		 711
712 if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
713 || !data->valid) {
714 for (i = 0; i <= 4; i++) {
715 data->in[i] =
2ec342e6
JD		 716 via686a_read_value(data, VIA686A_REG_IN(i));
717 data->in_min[i] = via686a_read_value(data,
1da177e4
LT		 718 VIA686A_REG_IN_MIN
719 (i));
720 data->in_max[i] =
2ec342e6 721 via686a_read_value(data, VIA686A_REG_IN_MAX(i));
1da177e4
LT		 722 }
723 for (i = 1; i <= 2; i++) {
724 data->fan[i - 1] =
2ec342e6
JD		 725 via686a_read_value(data, VIA686A_REG_FAN(i));
726 data->fan_min[i - 1] = via686a_read_value(data,
1da177e4
LT		 727 VIA686A_REG_FAN_MIN(i));
728 }
729 for (i = 0; i <= 2; i++) {
2ec342e6 730 data->temp[i] = via686a_read_value(data,
563db2fe 731 VIA686A_REG_TEMP[i]) << 2;
1da177e4 732 data->temp_over[i] =
2ec342e6 733 via686a_read_value(data,
563db2fe 734 VIA686A_REG_TEMP_OVER[i]);
1da177e4 735 data->temp_hyst[i] =
2ec342e6 736 via686a_read_value(data,
563db2fe 737 VIA686A_REG_TEMP_HYST[i]);
1da177e4 738 }
be8992c2 739 /* add in lower 2 bits
1da177e4
LT		 740 temp1 uses bits 7-6 of VIA686A_REG_TEMP_LOW1
741 temp2 uses bits 5-4 of VIA686A_REG_TEMP_LOW23
742 temp3 uses bits 7-6 of VIA686A_REG_TEMP_LOW23
743 */
2ec342e6 744 data->temp[0] |= (via686a_read_value(data,
1da177e4
LT		 745 VIA686A_REG_TEMP_LOW1)
746 & 0xc0) >> 6;
747 data->temp[1] |=
2ec342e6 748 (via686a_read_value(data, VIA686A_REG_TEMP_LOW23) &
1da177e4
LT		 749 0x30) >> 4;
750 data->temp[2] |=
2ec342e6 751 (via686a_read_value(data, VIA686A_REG_TEMP_LOW23) &
1da177e4
LT		 752 0xc0) >> 6;
753
2ec342e6 754 i = via686a_read_value(data, VIA686A_REG_FANDIV);
1da177e4
LT		 755 data->fan_div[0] = (i >> 4) & 0x03;
756 data->fan_div[1] = i >> 6;
757 data->alarms =
2ec342e6 758 via686a_read_value(data,
1da177e4 759 VIA686A_REG_ALARM1) |
2ec342e6 760 (via686a_read_value(data, VIA686A_REG_ALARM2) << 8);
1da177e4
LT		 761 data->last_updated = jiffies;
762 data->valid = 1;
763 }
764
9a61bf63 765 mutex_unlock(&data->update_lock);
1da177e4
LT		 766
767 return data;
768}
769
3dd3a156 770static const struct pci_device_id via686a_pci_ids[] = {
be8992c2
JD		 771 { PCI_DEVICE(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C686_4) },
772 { 0, }
1da177e4
LT		 773};
774
775MODULE_DEVICE_TABLE(pci, via686a_pci_ids);
776
2ec342e6
JD		 777static int __devinit via686a_device_add(unsigned short address)
778{
779 struct resource res = {
780 .start = address,
781 .end = address + VIA686A_EXTENT - 1,
782 .name = "via686a",
783 .flags = IORESOURCE_IO,
784 };
785 int err;
786
b9acb64a
JD		 787 err = acpi_check_resource_conflict(&res);
788 if (err)
789 goto exit;
790
2ec342e6
JD		 791 pdev = platform_device_alloc("via686a", address);
792 if (!pdev) {
793 err = -ENOMEM;
794 printk(KERN_ERR "via686a: Device allocation failed\n");
795 goto exit;
796 }
797
798 err = platform_device_add_resources(pdev, &res, 1);
799 if (err) {
800 printk(KERN_ERR "via686a: Device resource addition failed "
801 "(%d)\n", err);
802 goto exit_device_put;
803 }
804
805 err = platform_device_add(pdev);
806 if (err) {
807 printk(KERN_ERR "via686a: Device addition failed (%d)\n",
808 err);
809 goto exit_device_put;
810 }
811
812 return 0;
813
814exit_device_put:
815 platform_device_put(pdev);
816exit:
817 return err;
818}
819
1da177e4 820static int __devinit via686a_pci_probe(struct pci_dev *dev,
be8992c2 821 const struct pci_device_id *id)
1da177e4 822{
2ec342e6 823 u16 address, val;
be8992c2 824
2ec342e6
JD		 825 if (force_addr) {
826 address = force_addr & ~(VIA686A_EXTENT - 1);
827 dev_warn(&dev->dev, "Forcing ISA address 0x%x\n", address);
828 if (PCIBIOS_SUCCESSFUL !=
829 pci_write_config_word(dev, VIA686A_BASE_REG, address | 1))
830 return -ENODEV;
831 }
be8992c2
JD		 832 if (PCIBIOS_SUCCESSFUL !=
833 pci_read_config_word(dev, VIA686A_BASE_REG, &val))
834 return -ENODEV;
835
2d8672c5 836 address = val & ~(VIA686A_EXTENT - 1);
2ec342e6 837 if (address == 0) {
be8992c2
JD		 838 dev_err(&dev->dev, "base address not set - upgrade BIOS "
839 "or use force_addr=0xaddr\n");
840 return -ENODEV;
841 }
be8992c2 842
2ec342e6
JD		 843 if (PCIBIOS_SUCCESSFUL !=
844 pci_read_config_word(dev, VIA686A_ENABLE_REG, &val))
845 return -ENODEV;
846 if (!(val & 0x0001)) {
847 if (!force_addr) {
848 dev_warn(&dev->dev, "Sensors disabled, enable "
849 "with force_addr=0x%x\n", address);
850 return -ENODEV;
851 }
852
853 dev_warn(&dev->dev, "Enabling sensors\n");
854 if (PCIBIOS_SUCCESSFUL !=
855 pci_write_config_word(dev, VIA686A_ENABLE_REG,
856 val | 0x0001))
857 return -ENODEV;
1da177e4
LT		 858 }
859
2ec342e6
JD		 860 if (platform_driver_register(&via686a_driver))
861 goto exit;
862
863 /* Sets global pdev as a side effect */
864 if (via686a_device_add(address))
865 goto exit_unregister;
866
1da177e4
LT		 867 /* Always return failure here. This is to allow other drivers to bind
868 * to this pci device. We don't really want to have control over the
869 * pci device, we only wanted to read as few register values from it.
870 */
2ec342e6
JD		 871 s_bridge = pci_dev_get(dev);
872 return -ENODEV;
873
874exit_unregister:
875 platform_driver_unregister(&via686a_driver);
876exit:
1da177e4
LT		 877 return -ENODEV;
878}
879
880static struct pci_driver via686a_pci_driver = {
be8992c2
JD		 881 .name = "via686a",
882 .id_table = via686a_pci_ids,
883 .probe = via686a_pci_probe,
1da177e4
LT		 884};
885
886static int __init sm_via686a_init(void)
887{
be8992c2 888 return pci_register_driver(&via686a_pci_driver);
1da177e4
LT		 889}
890
891static void __exit sm_via686a_exit(void)
892{
893 pci_unregister_driver(&via686a_pci_driver);
894 if (s_bridge != NULL) {
2ec342e6
JD		 895 platform_device_unregister(pdev);
896 platform_driver_unregister(&via686a_driver);
1da177e4
LT		 897 pci_dev_put(s_bridge);
898 s_bridge = NULL;
899 }
900}
901
96de0e25 902MODULE_AUTHOR("Kyösti Mälkki <kmalkki@cc.hut.fi>, "
be8992c2
JD		 903 "Mark Studebaker <mdsxyz123@yahoo.com> "
904 "and Bob Dougherty <bobd@stanford.edu>");
1da177e4
LT		 905MODULE_DESCRIPTION("VIA 686A Sensor device");
906MODULE_LICENSE("GPL");
907
908module_init(sm_via686a_init);
909module_exit(sm_via686a_exit);
Clone of davem's net-next-2.6 tree