2 via686a.c - Part of lm_sensors, Linux kernel modules
3 for hardware monitoring
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 (Some conversion-factor data were contributed by Jonathan Teh Soon Yew
10 <j.teh@iname.com> and Alex van Kaam <darkside@chello.nl>.)
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.
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.
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.
28 Supports the Via VT82C686A, VT82C686B south bridges.
29 Reports all as a 686A.
30 Warning - only supports a single device.
33 #include <linux/module.h>
34 #include <linux/slab.h>
35 #include <linux/pci.h>
36 #include <linux/delay.h>
37 #include <linux/jiffies.h>
38 #include <linux/i2c.h>
39 #include <linux/i2c-sensor.h>
40 #include <linux/init.h>
44 /* If force_addr is set to anything different from 0, we forcibly enable
45 the device at the given address. */
46 static unsigned short force_addr = 0;
47 module_param(force_addr, ushort, 0);
48 MODULE_PARM_DESC(force_addr,
49 "Initialize the base address of the sensors");
52 Note that we can't determine the ISA address until we have initialized
54 static unsigned short normal_i2c[] = { I2C_CLIENT_END };
55 static unsigned int normal_isa[] = { 0x0000, I2C_CLIENT_ISA_END };
57 /* Insmod parameters */
58 SENSORS_INSMOD_1(via686a);
61 The Via 686a southbridge has a LM78-like chip integrated on the same IC.
62 This driver is a customized copy of lm78.c
65 /* Many VIA686A constants specified below */
67 /* Length of ISA address segment */
68 #define VIA686A_EXTENT 0x80
69 #define VIA686A_BASE_REG 0x70
70 #define VIA686A_ENABLE_REG 0x74
72 /* The VIA686A registers */
73 /* ins numbered 0-4 */
74 #define VIA686A_REG_IN_MAX(nr) (0x2b + ((nr) * 2))
75 #define VIA686A_REG_IN_MIN(nr) (0x2c + ((nr) * 2))
76 #define VIA686A_REG_IN(nr) (0x22 + (nr))
78 /* fans numbered 1-2 */
79 #define VIA686A_REG_FAN_MIN(nr) (0x3a + (nr))
80 #define VIA686A_REG_FAN(nr) (0x28 + (nr))
82 /* the following values are as speced by VIA: */
83 static const u8 regtemp[] = { 0x20, 0x21, 0x1f };
84 static const u8 regover[] = { 0x39, 0x3d, 0x1d };
85 static const u8 reghyst[] = { 0x3a, 0x3e, 0x1e };
87 /* temps numbered 1-3 */
88 #define VIA686A_REG_TEMP(nr) (regtemp[nr])
89 #define VIA686A_REG_TEMP_OVER(nr) (regover[nr])
90 #define VIA686A_REG_TEMP_HYST(nr) (reghyst[nr])
91 #define VIA686A_REG_TEMP_LOW1 0x4b // bits 7-6
92 #define VIA686A_REG_TEMP_LOW23 0x49 // 2 = bits 5-4, 3 = bits 7-6
94 #define VIA686A_REG_ALARM1 0x41
95 #define VIA686A_REG_ALARM2 0x42
96 #define VIA686A_REG_FANDIV 0x47
97 #define VIA686A_REG_CONFIG 0x40
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
104 #define VIA686A_REG_TEMP_MODE 0x4b
105 /* We'll just assume that you want to set all 3 simultaneously: */
106 #define VIA686A_TEMP_MODE_MASK 0x3F
107 #define VIA686A_TEMP_MODE_CONTINUOUS (0x00)
109 /* Conversions. Limit checking is only done on the TO_REG
112 ********* VOLTAGE CONVERSIONS (Bob Dougherty) ********
113 From HWMon.cpp (Copyright 1998-2000 Jonathan Teh Soon Yew):
114 voltagefactor[0]=1.25/2628; (2628/1.25=2102.4) // Vccp
115 voltagefactor[1]=1.25/2628; (2628/1.25=2102.4) // +2.5V
116 voltagefactor[2]=1.67/2628; (2628/1.67=1573.7) // +3.3V
117 voltagefactor[3]=2.6/2628; (2628/2.60=1010.8) // +5V
118 voltagefactor[4]=6.3/2628; (2628/6.30=417.14) // +12V
119 in[i]=(data[i+2]*25.0+133)*voltagefactor[i];
121 volts = (25*regVal+133)*factor
122 regVal = (volts/factor-133)/25
123 (These conversions were contributed by Jonathan Teh Soon Yew
124 <j.teh@iname.com>) */
125 static inline u8 IN_TO_REG(long val, int inNum)
127 /* To avoid floating point, we multiply constants by 10 (100 for +12V).
128 Rounding is done (120500 is actually 133000 - 12500).
129 Remember that val is expressed in 0.001V/bit, which is why we divide
130 by an additional 10000 (100000 for +12V): 1000 for val and 10 (100)
131 for the constants. */
134 SENSORS_LIMIT((val * 21024 - 1205000) / 250000, 0, 255);
137 SENSORS_LIMIT((val * 15737 - 1205000) / 250000, 0, 255);
140 SENSORS_LIMIT((val * 10108 - 1205000) / 250000, 0, 255);
143 SENSORS_LIMIT((val * 41714 - 12050000) / 2500000, 0, 255);
146 static inline long IN_FROM_REG(u8 val, int inNum)
148 /* To avoid floating point, we multiply constants by 10 (100 for +12V).
149 We also multiply them by 1000 because we want 0.001V/bit for the
150 output value. Rounding is done. */
152 return (long) ((250000 * val + 1330000 + 21024 / 2) / 21024);
154 return (long) ((250000 * val + 1330000 + 15737 / 2) / 15737);
156 return (long) ((250000 * val + 1330000 + 10108 / 2) / 10108);
158 return (long) ((2500000 * val + 13300000 + 41714 / 2) / 41714);
161 /********* FAN RPM CONVERSIONS ********/
162 /* Higher register values = slower fans (the fan's strobe gates a counter).
163 But this chip saturates back at 0, not at 255 like all the other chips.
165 static inline u8 FAN_TO_REG(long rpm, int div)
169 rpm = SENSORS_LIMIT(rpm, 1, 1000000);
170 return SENSORS_LIMIT((1350000 + rpm * div / 2) / (rpm * div), 1, 255);
173 #define FAN_FROM_REG(val,div) ((val)==0?0:(val)==255?0:1350000/((val)*(div)))
175 /******** TEMP CONVERSIONS (Bob Dougherty) *********/
176 /* linear fits from HWMon.cpp (Copyright 1998-2000 Jonathan Teh Soon Yew)
178 return double(temp)*0.427-32.08;
179 else if(temp>=169 && temp<=202)
180 return double(temp)*0.582-58.16;
182 return double(temp)*0.924-127.33;
184 A fifth-order polynomial fits the unofficial data (provided by Alex van
185 Kaam <darkside@chello.nl>) a bit better. It also give more reasonable
186 numbers on my machine (ie. they agree with what my BIOS tells me).
187 Here's the fifth-order fit to the 8-bit data:
188 temp = 1.625093e-10*val^5 - 1.001632e-07*val^4 + 2.457653e-05*val^3 -
189 2.967619e-03*val^2 + 2.175144e-01*val - 7.090067e+0.
191 (2000-10-25- RFD: thanks to Uwe Andersen <uandersen@mayah.com> for
192 finding my typos in this formula!)
194 Alas, none of the elegant function-fit solutions will work because we
195 aren't allowed to use floating point in the kernel and doing it with
196 integers doesn't rpovide enough precision. So we'll do boring old
197 look-up table stuff. The unofficial data (see below) have effectively
198 7-bit resolution (they are rounded to the nearest degree). I'm assuming
199 that the transfer function of the device is monotonic and smooth, so a
200 smooth function fit to the data will allow us to get better precision.
201 I used the 5th-order poly fit described above and solved for
202 VIA register values 0-255. I *10 before rounding, so we get tenth-degree
203 precision. (I could have done all 1024 values for our 10-bit readings,
204 but the function is very linear in the useful range (0-80 deg C), so
205 we'll just use linear interpolation for 10-bit readings.) So, tempLUT
206 is the temp at via register values 0-255: */
207 static const long tempLUT[] =
208 { -709, -688, -667, -646, -627, -607, -589, -570, -553, -536, -519,
209 -503, -487, -471, -456, -442, -428, -414, -400, -387, -375,
210 -362, -350, -339, -327, -316, -305, -295, -285, -275, -265,
211 -255, -246, -237, -229, -220, -212, -204, -196, -188, -180,
212 -173, -166, -159, -152, -145, -139, -132, -126, -120, -114,
213 -108, -102, -96, -91, -85, -80, -74, -69, -64, -59, -54, -49,
214 -44, -39, -34, -29, -25, -20, -15, -11, -6, -2, 3, 7, 12, 16,
215 20, 25, 29, 33, 37, 42, 46, 50, 54, 59, 63, 67, 71, 75, 79, 84,
216 88, 92, 96, 100, 104, 109, 113, 117, 121, 125, 130, 134, 138,
217 142, 146, 151, 155, 159, 163, 168, 172, 176, 181, 185, 189,
218 193, 198, 202, 206, 211, 215, 219, 224, 228, 232, 237, 241,
219 245, 250, 254, 259, 263, 267, 272, 276, 281, 285, 290, 294,
220 299, 303, 307, 312, 316, 321, 325, 330, 334, 339, 344, 348,
221 353, 357, 362, 366, 371, 376, 380, 385, 390, 395, 399, 404,
222 409, 414, 419, 423, 428, 433, 438, 443, 449, 454, 459, 464,
223 469, 475, 480, 486, 491, 497, 502, 508, 514, 520, 526, 532,
224 538, 544, 551, 557, 564, 571, 578, 584, 592, 599, 606, 614,
225 621, 629, 637, 645, 654, 662, 671, 680, 689, 698, 708, 718,
226 728, 738, 749, 759, 770, 782, 793, 805, 818, 830, 843, 856,
227 870, 883, 898, 912, 927, 943, 958, 975, 991, 1008, 1026, 1044,
228 1062, 1081, 1101, 1121, 1141, 1162, 1184, 1206, 1229, 1252,
229 1276, 1301, 1326, 1352, 1378, 1406, 1434, 1462
232 /* the original LUT values from Alex van Kaam <darkside@chello.nl>
233 (for via register values 12-240):
234 {-50,-49,-47,-45,-43,-41,-39,-38,-37,-35,-34,-33,-32,-31,
235 -30,-29,-28,-27,-26,-25,-24,-24,-23,-22,-21,-20,-20,-19,-18,-17,-17,-16,-15,
236 -15,-14,-14,-13,-12,-12,-11,-11,-10,-9,-9,-8,-8,-7,-7,-6,-6,-5,-5,-4,-4,-3,
237 -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,
238 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,
239 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,
240 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,
241 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,
242 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,
243 85,86,88,89,91,92,94,96,97,99,101,103,105,107,109,110};
246 Here's the reverse LUT. I got it by doing a 6-th order poly fit (needed
247 an extra term for a good fit to these inverse data!) and then
248 solving for each temp value from -50 to 110 (the useable range for
249 this chip). Here's the fit:
250 viaRegVal = -1.160370e-10*val^6 +3.193693e-08*val^5 - 1.464447e-06*val^4
251 - 2.525453e-04*val^3 + 1.424593e-02*val^2 + 2.148941e+00*val +7.275808e+01)
253 static const u8 viaLUT[] =
254 { 12, 12, 13, 14, 14, 15, 16, 16, 17, 18, 18, 19, 20, 20, 21, 22, 23,
255 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 35, 36, 37, 39, 40,
256 41, 43, 45, 46, 48, 49, 51, 53, 55, 57, 59, 60, 62, 64, 66,
257 69, 71, 73, 75, 77, 79, 82, 84, 86, 88, 91, 93, 95, 98, 100,
258 103, 105, 107, 110, 112, 115, 117, 119, 122, 124, 126, 129,
259 131, 134, 136, 138, 140, 143, 145, 147, 150, 152, 154, 156,
260 158, 160, 162, 164, 166, 168, 170, 172, 174, 176, 178, 180,
261 182, 183, 185, 187, 188, 190, 192, 193, 195, 196, 198, 199,
262 200, 202, 203, 205, 206, 207, 208, 209, 210, 211, 212, 213,
263 214, 215, 216, 217, 218, 219, 220, 221, 222, 222, 223, 224,
264 225, 226, 226, 227, 228, 228, 229, 230, 230, 231, 232, 232,
265 233, 233, 234, 235, 235, 236, 236, 237, 237, 238, 238, 239,
269 /* Converting temps to (8-bit) hyst and over registers
270 No interpolation here.
271 The +50 is because the temps start at -50 */
272 static inline u8 TEMP_TO_REG(long val)
274 return viaLUT[val <= -50000 ? 0 : val >= 110000 ? 160 :
275 (val < 0 ? val - 500 : val + 500) / 1000 + 50];
278 /* for 8-bit temperature hyst and over registers */
279 #define TEMP_FROM_REG(val) (tempLUT[(val)] * 100)
281 /* for 10-bit temperature readings */
282 static inline long TEMP_FROM_REG10(u16 val)
284 u16 eightBits = val >> 2;
285 u16 twoBits = val & 3;
287 /* no interpolation for these */
288 if (twoBits == 0 || eightBits == 255)
289 return TEMP_FROM_REG(eightBits);
291 /* do some linear interpolation */
292 return (tempLUT[eightBits] * (4 - twoBits) +
293 tempLUT[eightBits + 1] * twoBits) * 25;
296 #define ALARMS_FROM_REG(val) (val)
298 #define DIV_FROM_REG(val) (1 << (val))
299 #define DIV_TO_REG(val) ((val)==8?3:(val)==4?2:(val)==1?0:1)
301 /* For the VIA686A, we need to keep some data in memory.
302 The structure is dynamically allocated, at the same time when a new
303 via686a client is allocated. */
304 struct via686a_data {
305 struct i2c_client client;
306 struct semaphore update_lock;
307 char valid; /* !=0 if following fields are valid */
308 unsigned long last_updated; /* In jiffies */
310 u8 in[5]; /* Register value */
311 u8 in_max[5]; /* Register value */
312 u8 in_min[5]; /* Register value */
313 u8 fan[2]; /* Register value */
314 u8 fan_min[2]; /* Register value */
315 u16 temp[3]; /* Register value 10 bit */
316 u8 temp_over[3]; /* Register value */
317 u8 temp_hyst[3]; /* Register value */
318 u8 fan_div[2]; /* Register encoding, shifted right */
319 u16 alarms; /* Register encoding, combined */
322 static struct pci_dev *s_bridge; /* pointer to the (only) via686a */
324 static int via686a_attach_adapter(struct i2c_adapter *adapter);
325 static int via686a_detect(struct i2c_adapter *adapter, int address, int kind);
326 static int via686a_detach_client(struct i2c_client *client);
328 static inline int via686a_read_value(struct i2c_client *client, u8 reg)
330 return (inb_p(client->addr + reg));
333 static inline void via686a_write_value(struct i2c_client *client, u8 reg,
336 outb_p(value, client->addr + reg);
339 static struct via686a_data *via686a_update_device(struct device *dev);
340 static void via686a_init_client(struct i2c_client *client);
342 /* following are the sysfs callback functions */
344 /* 7 voltage sensors */
345 static ssize_t show_in(struct device *dev, char *buf, int nr) {
346 struct via686a_data *data = via686a_update_device(dev);
347 return sprintf(buf, "%ld\n", IN_FROM_REG(data->in[nr], nr));
350 static ssize_t show_in_min(struct device *dev, char *buf, int nr) {
351 struct via686a_data *data = via686a_update_device(dev);
352 return sprintf(buf, "%ld\n", IN_FROM_REG(data->in_min[nr], nr));
355 static ssize_t show_in_max(struct device *dev, char *buf, int nr) {
356 struct via686a_data *data = via686a_update_device(dev);
357 return sprintf(buf, "%ld\n", IN_FROM_REG(data->in_max[nr], nr));
360 static ssize_t set_in_min(struct device *dev, const char *buf,
361 size_t count, int nr) {
362 struct i2c_client *client = to_i2c_client(dev);
363 struct via686a_data *data = i2c_get_clientdata(client);
364 unsigned long val = simple_strtoul(buf, NULL, 10);
366 down(&data->update_lock);
367 data->in_min[nr] = IN_TO_REG(val,nr);
368 via686a_write_value(client, VIA686A_REG_IN_MIN(nr),
370 up(&data->update_lock);
373 static ssize_t set_in_max(struct device *dev, const char *buf,
374 size_t count, int nr) {
375 struct i2c_client *client = to_i2c_client(dev);
376 struct via686a_data *data = i2c_get_clientdata(client);
377 unsigned long val = simple_strtoul(buf, NULL, 10);
379 down(&data->update_lock);
380 data->in_max[nr] = IN_TO_REG(val,nr);
381 via686a_write_value(client, VIA686A_REG_IN_MAX(nr),
383 up(&data->update_lock);
386 #define show_in_offset(offset) \
388 show_in##offset (struct device *dev, struct device_attribute *attr, char *buf) \
390 return show_in(dev, buf, offset); \
393 show_in##offset##_min (struct device *dev, struct device_attribute *attr, char *buf) \
395 return show_in_min(dev, buf, offset); \
398 show_in##offset##_max (struct device *dev, struct device_attribute *attr, char *buf) \
400 return show_in_max(dev, buf, offset); \
402 static ssize_t set_in##offset##_min (struct device *dev, struct device_attribute *attr, \
403 const char *buf, size_t count) \
405 return set_in_min(dev, buf, count, offset); \
407 static ssize_t set_in##offset##_max (struct device *dev, struct device_attribute *attr, \
408 const char *buf, size_t count) \
410 return set_in_max(dev, buf, count, offset); \
412 static DEVICE_ATTR(in##offset##_input, S_IRUGO, show_in##offset, NULL);\
413 static DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \
414 show_in##offset##_min, set_in##offset##_min); \
415 static DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \
416 show_in##offset##_max, set_in##offset##_max);
425 static ssize_t show_temp(struct device *dev, char *buf, int nr) {
426 struct via686a_data *data = via686a_update_device(dev);
427 return sprintf(buf, "%ld\n", TEMP_FROM_REG10(data->temp[nr]));
429 static ssize_t show_temp_over(struct device *dev, char *buf, int nr) {
430 struct via686a_data *data = via686a_update_device(dev);
431 return sprintf(buf, "%ld\n", TEMP_FROM_REG(data->temp_over[nr]));
433 static ssize_t show_temp_hyst(struct device *dev, char *buf, int nr) {
434 struct via686a_data *data = via686a_update_device(dev);
435 return sprintf(buf, "%ld\n", TEMP_FROM_REG(data->temp_hyst[nr]));
437 static ssize_t set_temp_over(struct device *dev, const char *buf,
438 size_t count, int nr) {
439 struct i2c_client *client = to_i2c_client(dev);
440 struct via686a_data *data = i2c_get_clientdata(client);
441 int val = simple_strtol(buf, NULL, 10);
443 down(&data->update_lock);
444 data->temp_over[nr] = TEMP_TO_REG(val);
445 via686a_write_value(client, VIA686A_REG_TEMP_OVER(nr), data->temp_over[nr]);
446 up(&data->update_lock);
449 static ssize_t set_temp_hyst(struct device *dev, const char *buf,
450 size_t count, int nr) {
451 struct i2c_client *client = to_i2c_client(dev);
452 struct via686a_data *data = i2c_get_clientdata(client);
453 int val = simple_strtol(buf, NULL, 10);
455 down(&data->update_lock);
456 data->temp_hyst[nr] = TEMP_TO_REG(val);
457 via686a_write_value(client, VIA686A_REG_TEMP_HYST(nr), data->temp_hyst[nr]);
458 up(&data->update_lock);
461 #define show_temp_offset(offset) \
462 static ssize_t show_temp_##offset (struct device *dev, struct device_attribute *attr, char *buf) \
464 return show_temp(dev, buf, offset - 1); \
467 show_temp_##offset##_over (struct device *dev, struct device_attribute *attr, char *buf) \
469 return show_temp_over(dev, buf, offset - 1); \
472 show_temp_##offset##_hyst (struct device *dev, struct device_attribute *attr, char *buf) \
474 return show_temp_hyst(dev, buf, offset - 1); \
476 static ssize_t set_temp_##offset##_over (struct device *dev, struct device_attribute *attr, \
477 const char *buf, size_t count) \
479 return set_temp_over(dev, buf, count, offset - 1); \
481 static ssize_t set_temp_##offset##_hyst (struct device *dev, struct device_attribute *attr, \
482 const char *buf, size_t count) \
484 return set_temp_hyst(dev, buf, count, offset - 1); \
486 static DEVICE_ATTR(temp##offset##_input, S_IRUGO, show_temp_##offset, NULL);\
487 static DEVICE_ATTR(temp##offset##_max, S_IRUGO | S_IWUSR, \
488 show_temp_##offset##_over, set_temp_##offset##_over); \
489 static DEVICE_ATTR(temp##offset##_max_hyst, S_IRUGO | S_IWUSR, \
490 show_temp_##offset##_hyst, set_temp_##offset##_hyst);
497 static ssize_t show_fan(struct device *dev, char *buf, int nr) {
498 struct via686a_data *data = via686a_update_device(dev);
499 return sprintf(buf,"%d\n", FAN_FROM_REG(data->fan[nr],
500 DIV_FROM_REG(data->fan_div[nr])) );
502 static ssize_t show_fan_min(struct device *dev, char *buf, int nr) {
503 struct via686a_data *data = via686a_update_device(dev);
504 return sprintf(buf,"%d\n",
505 FAN_FROM_REG(data->fan_min[nr], DIV_FROM_REG(data->fan_div[nr])) );
507 static ssize_t show_fan_div(struct device *dev, char *buf, int nr) {
508 struct via686a_data *data = via686a_update_device(dev);
509 return sprintf(buf,"%d\n", DIV_FROM_REG(data->fan_div[nr]) );
511 static ssize_t set_fan_min(struct device *dev, const char *buf,
512 size_t count, int nr) {
513 struct i2c_client *client = to_i2c_client(dev);
514 struct via686a_data *data = i2c_get_clientdata(client);
515 int val = simple_strtol(buf, NULL, 10);
517 down(&data->update_lock);
518 data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr]));
519 via686a_write_value(client, VIA686A_REG_FAN_MIN(nr+1), data->fan_min[nr]);
520 up(&data->update_lock);
523 static ssize_t set_fan_div(struct device *dev, const char *buf,
524 size_t count, int nr) {
525 struct i2c_client *client = to_i2c_client(dev);
526 struct via686a_data *data = i2c_get_clientdata(client);
527 int val = simple_strtol(buf, NULL, 10);
530 down(&data->update_lock);
531 old = via686a_read_value(client, VIA686A_REG_FANDIV);
532 data->fan_div[nr] = DIV_TO_REG(val);
533 old = (old & 0x0f) | (data->fan_div[1] << 6) | (data->fan_div[0] << 4);
534 via686a_write_value(client, VIA686A_REG_FANDIV, old);
535 up(&data->update_lock);
539 #define show_fan_offset(offset) \
540 static ssize_t show_fan_##offset (struct device *dev, struct device_attribute *attr, char *buf) \
542 return show_fan(dev, buf, offset - 1); \
544 static ssize_t show_fan_##offset##_min (struct device *dev, struct device_attribute *attr, char *buf) \
546 return show_fan_min(dev, buf, offset - 1); \
548 static ssize_t show_fan_##offset##_div (struct device *dev, struct device_attribute *attr, char *buf) \
550 return show_fan_div(dev, buf, offset - 1); \
552 static ssize_t set_fan_##offset##_min (struct device *dev, struct device_attribute *attr, \
553 const char *buf, size_t count) \
555 return set_fan_min(dev, buf, count, offset - 1); \
557 static ssize_t set_fan_##offset##_div (struct device *dev, struct device_attribute *attr, \
558 const char *buf, size_t count) \
560 return set_fan_div(dev, buf, count, offset - 1); \
562 static DEVICE_ATTR(fan##offset##_input, S_IRUGO, show_fan_##offset, NULL);\
563 static DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \
564 show_fan_##offset##_min, set_fan_##offset##_min); \
565 static DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR, \
566 show_fan_##offset##_div, set_fan_##offset##_div);
572 static ssize_t show_alarms(struct device *dev, struct device_attribute *attr, char *buf) {
573 struct via686a_data *data = via686a_update_device(dev);
574 return sprintf(buf,"%d\n", ALARMS_FROM_REG(data->alarms));
576 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
578 /* The driver. I choose to use type i2c_driver, as at is identical to both
579 smbus_driver and isa_driver, and clients could be of either kind */
580 static struct i2c_driver via686a_driver = {
581 .owner = THIS_MODULE,
583 .id = I2C_DRIVERID_VIA686A,
584 .flags = I2C_DF_NOTIFY,
585 .attach_adapter = via686a_attach_adapter,
586 .detach_client = via686a_detach_client,
590 /* This is called when the module is loaded */
591 static int via686a_attach_adapter(struct i2c_adapter *adapter)
593 if (!(adapter->class & I2C_CLASS_HWMON))
595 return i2c_detect(adapter, &addr_data, via686a_detect);
598 static int via686a_detect(struct i2c_adapter *adapter, int address, int kind)
600 struct i2c_client *new_client;
601 struct via686a_data *data;
603 const char client_name[] = "via686a";
606 /* Make sure we are probing the ISA bus!! */
607 if (!i2c_is_isa_adapter(adapter)) {
608 dev_err(&adapter->dev,
609 "via686a_detect called for an I2C bus adapter?!?\n");
613 /* 8231 requires multiple of 256, we enforce that on 686 as well */
615 address = force_addr & 0xFF00;
618 dev_warn(&adapter->dev,"forcing ISA address 0x%04X\n", address);
619 if (PCIBIOS_SUCCESSFUL !=
620 pci_write_config_word(s_bridge, VIA686A_BASE_REG, address))
623 if (PCIBIOS_SUCCESSFUL !=
624 pci_read_config_word(s_bridge, VIA686A_ENABLE_REG, &val))
626 if (!(val & 0x0001)) {
627 dev_warn(&adapter->dev,"enabling sensors\n");
628 if (PCIBIOS_SUCCESSFUL !=
629 pci_write_config_word(s_bridge, VIA686A_ENABLE_REG,
634 /* Reserve the ISA region */
635 if (!request_region(address, VIA686A_EXTENT, via686a_driver.name)) {
636 dev_err(&adapter->dev,"region 0x%x already in use!\n",
641 if (!(data = kmalloc(sizeof(struct via686a_data), GFP_KERNEL))) {
645 memset(data, 0, sizeof(struct via686a_data));
647 new_client = &data->client;
648 i2c_set_clientdata(new_client, data);
649 new_client->addr = address;
650 new_client->adapter = adapter;
651 new_client->driver = &via686a_driver;
652 new_client->flags = 0;
654 /* Fill in the remaining client fields and put into the global list */
655 strlcpy(new_client->name, client_name, I2C_NAME_SIZE);
658 init_MUTEX(&data->update_lock);
659 /* Tell the I2C layer a new client has arrived */
660 if ((err = i2c_attach_client(new_client)))
663 /* Initialize the VIA686A chip */
664 via686a_init_client(new_client);
666 /* Register sysfs hooks */
667 device_create_file(&new_client->dev, &dev_attr_in0_input);
668 device_create_file(&new_client->dev, &dev_attr_in1_input);
669 device_create_file(&new_client->dev, &dev_attr_in2_input);
670 device_create_file(&new_client->dev, &dev_attr_in3_input);
671 device_create_file(&new_client->dev, &dev_attr_in4_input);
672 device_create_file(&new_client->dev, &dev_attr_in0_min);
673 device_create_file(&new_client->dev, &dev_attr_in1_min);
674 device_create_file(&new_client->dev, &dev_attr_in2_min);
675 device_create_file(&new_client->dev, &dev_attr_in3_min);
676 device_create_file(&new_client->dev, &dev_attr_in4_min);
677 device_create_file(&new_client->dev, &dev_attr_in0_max);
678 device_create_file(&new_client->dev, &dev_attr_in1_max);
679 device_create_file(&new_client->dev, &dev_attr_in2_max);
680 device_create_file(&new_client->dev, &dev_attr_in3_max);
681 device_create_file(&new_client->dev, &dev_attr_in4_max);
682 device_create_file(&new_client->dev, &dev_attr_temp1_input);
683 device_create_file(&new_client->dev, &dev_attr_temp2_input);
684 device_create_file(&new_client->dev, &dev_attr_temp3_input);
685 device_create_file(&new_client->dev, &dev_attr_temp1_max);
686 device_create_file(&new_client->dev, &dev_attr_temp2_max);
687 device_create_file(&new_client->dev, &dev_attr_temp3_max);
688 device_create_file(&new_client->dev, &dev_attr_temp1_max_hyst);
689 device_create_file(&new_client->dev, &dev_attr_temp2_max_hyst);
690 device_create_file(&new_client->dev, &dev_attr_temp3_max_hyst);
691 device_create_file(&new_client->dev, &dev_attr_fan1_input);
692 device_create_file(&new_client->dev, &dev_attr_fan2_input);
693 device_create_file(&new_client->dev, &dev_attr_fan1_min);
694 device_create_file(&new_client->dev, &dev_attr_fan2_min);
695 device_create_file(&new_client->dev, &dev_attr_fan1_div);
696 device_create_file(&new_client->dev, &dev_attr_fan2_div);
697 device_create_file(&new_client->dev, &dev_attr_alarms);
704 release_region(address, VIA686A_EXTENT);
708 static int via686a_detach_client(struct i2c_client *client)
712 if ((err = i2c_detach_client(client))) {
713 dev_err(&client->dev,
714 "Client deregistration failed, client not detached.\n");
718 release_region(client->addr, VIA686A_EXTENT);
719 kfree(i2c_get_clientdata(client));
724 /* Called when we have found a new VIA686A. Set limits, etc. */
725 static void via686a_init_client(struct i2c_client *client)
729 /* Start monitoring */
730 reg = via686a_read_value(client, VIA686A_REG_CONFIG);
731 via686a_write_value(client, VIA686A_REG_CONFIG, (reg|0x01)&0x7F);
733 /* Configure temp interrupt mode for continuous-interrupt operation */
734 via686a_write_value(client, VIA686A_REG_TEMP_MODE,
735 via686a_read_value(client, VIA686A_REG_TEMP_MODE) &
736 !(VIA686A_TEMP_MODE_MASK | VIA686A_TEMP_MODE_CONTINUOUS));
739 static struct via686a_data *via686a_update_device(struct device *dev)
741 struct i2c_client *client = to_i2c_client(dev);
742 struct via686a_data *data = i2c_get_clientdata(client);
745 down(&data->update_lock);
747 if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
749 for (i = 0; i <= 4; i++) {
751 via686a_read_value(client, VIA686A_REG_IN(i));
752 data->in_min[i] = via686a_read_value(client,
756 via686a_read_value(client, VIA686A_REG_IN_MAX(i));
758 for (i = 1; i <= 2; i++) {
760 via686a_read_value(client, VIA686A_REG_FAN(i));
761 data->fan_min[i - 1] = via686a_read_value(client,
762 VIA686A_REG_FAN_MIN(i));
764 for (i = 0; i <= 2; i++) {
765 data->temp[i] = via686a_read_value(client,
766 VIA686A_REG_TEMP(i)) << 2;
768 via686a_read_value(client,
769 VIA686A_REG_TEMP_OVER(i));
771 via686a_read_value(client,
772 VIA686A_REG_TEMP_HYST(i));
774 /* add in lower 2 bits
775 temp1 uses bits 7-6 of VIA686A_REG_TEMP_LOW1
776 temp2 uses bits 5-4 of VIA686A_REG_TEMP_LOW23
777 temp3 uses bits 7-6 of VIA686A_REG_TEMP_LOW23
779 data->temp[0] |= (via686a_read_value(client,
780 VIA686A_REG_TEMP_LOW1)
783 (via686a_read_value(client, VIA686A_REG_TEMP_LOW23) &
786 (via686a_read_value(client, VIA686A_REG_TEMP_LOW23) &
789 i = via686a_read_value(client, VIA686A_REG_FANDIV);
790 data->fan_div[0] = (i >> 4) & 0x03;
791 data->fan_div[1] = i >> 6;
793 via686a_read_value(client,
794 VIA686A_REG_ALARM1) |
795 (via686a_read_value(client, VIA686A_REG_ALARM2) << 8);
796 data->last_updated = jiffies;
800 up(&data->update_lock);
805 static struct pci_device_id via686a_pci_ids[] = {
806 { PCI_DEVICE(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C686_4) },
810 MODULE_DEVICE_TABLE(pci, via686a_pci_ids);
812 static int __devinit via686a_pci_probe(struct pci_dev *dev,
813 const struct pci_device_id *id)
818 if (PCIBIOS_SUCCESSFUL !=
819 pci_read_config_word(dev, VIA686A_BASE_REG, &val))
822 addr = val & ~(VIA686A_EXTENT - 1);
823 if (addr == 0 && force_addr == 0) {
824 dev_err(&dev->dev,"base address not set - upgrade BIOS or use force_addr=0xaddr\n");
828 addr = force_addr; /* so detect will get called */
831 dev_err(&dev->dev,"No Via 686A sensors found.\n");
834 normal_isa[0] = addr;
836 s_bridge = pci_dev_get(dev);
837 if (i2c_add_driver(&via686a_driver)) {
838 pci_dev_put(s_bridge);
842 /* Always return failure here. This is to allow other drivers to bind
843 * to this pci device. We don't really want to have control over the
844 * pci device, we only wanted to read as few register values from it.
849 static struct pci_driver via686a_pci_driver = {
851 .id_table = via686a_pci_ids,
852 .probe = via686a_pci_probe,
855 static int __init sm_via686a_init(void)
857 return pci_register_driver(&via686a_pci_driver);
860 static void __exit sm_via686a_exit(void)
862 pci_unregister_driver(&via686a_pci_driver);
863 if (s_bridge != NULL) {
864 i2c_del_driver(&via686a_driver);
865 pci_dev_put(s_bridge);
870 MODULE_AUTHOR("Kyösti Mälkki <kmalkki@cc.hut.fi>, "
871 "Mark Studebaker <mdsxyz123@yahoo.com> "
872 "and Bob Dougherty <bobd@stanford.edu>");
873 MODULE_DESCRIPTION("VIA 686A Sensor device");
874 MODULE_LICENSE("GPL");
876 module_init(sm_via686a_init);
877 module_exit(sm_via686a_exit);