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/config.h>
34 #include <linux/module.h>
35 #include <linux/slab.h>
36 #include <linux/pci.h>
37 #include <linux/delay.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 int force_addr = 0;
47 MODULE_PARM(force_addr, "i");
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 short normal_i2c_range[] = { I2C_CLIENT_END };
56 static unsigned int normal_isa[] = { 0x0000, I2C_CLIENT_ISA_END };
57 static unsigned int normal_isa_range[] = { I2C_CLIENT_ISA_END };
59 /* Insmod parameters */
60 SENSORS_INSMOD_1(via686a);
63 The Via 686a southbridge has a LM78-like chip integrated on the same IC.
64 This driver is a customized copy of lm78.c
67 /* Many VIA686A constants specified below */
69 /* Length of ISA address segment */
70 #define VIA686A_EXTENT 0x80
71 #define VIA686A_BASE_REG 0x70
72 #define VIA686A_ENABLE_REG 0x74
74 /* The VIA686A registers */
75 /* ins numbered 0-4 */
76 #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))
80 /* fans numbered 1-2 */
81 #define VIA686A_REG_FAN_MIN(nr) (0x3a + (nr))
82 #define VIA686A_REG_FAN(nr) (0x28 + (nr))
84 /* the following values are as speced by VIA: */
85 static const u8 regtemp[] = { 0x20, 0x21, 0x1f };
86 static const u8 regover[] = { 0x39, 0x3d, 0x1d };
87 static const u8 reghyst[] = { 0x3a, 0x3e, 0x1e };
89 /* temps numbered 1-3 */
90 #define VIA686A_REG_TEMP(nr) (regtemp[nr])
91 #define VIA686A_REG_TEMP_OVER(nr) (regover[nr])
92 #define VIA686A_REG_TEMP_HYST(nr) (reghyst[nr])
93 #define VIA686A_REG_TEMP_LOW1 0x4b // bits 7-6
94 #define VIA686A_REG_TEMP_LOW23 0x49 // 2 = bits 5-4, 3 = bits 7-6
96 #define VIA686A_REG_ALARM1 0x41
97 #define VIA686A_REG_ALARM2 0x42
98 #define VIA686A_REG_FANDIV 0x47
99 #define VIA686A_REG_CONFIG 0x40
100 /* The following register sets temp interrupt mode (bits 1-0 for temp1,
101 3-2 for temp2, 5-4 for temp3). Modes are:
102 00 interrupt stays as long as value is out-of-range
103 01 interrupt is cleared once register is read (default)
104 10 comparator mode- like 00, but ignores hysteresis
106 #define VIA686A_REG_TEMP_MODE 0x4b
107 /* We'll just assume that you want to set all 3 simultaneously: */
108 #define VIA686A_TEMP_MODE_MASK 0x3F
109 #define VIA686A_TEMP_MODE_CONTINUOUS (0x00)
111 /* Conversions. Limit checking is only done on the TO_REG
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];
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 static inline u8 IN_TO_REG(long val, int inNum)
129 /* To avoid floating point, we multiply constants by 10 (100 for +12V).
130 Rounding is done (120500 is actually 133000 - 12500).
131 Remember that val is expressed in 0.001V/bit, which is why we divide
132 by an additional 10000 (100000 for +12V): 1000 for val and 10 (100)
133 for the constants. */
136 SENSORS_LIMIT((val * 21024 - 1205000) / 250000, 0, 255);
139 SENSORS_LIMIT((val * 15737 - 1205000) / 250000, 0, 255);
142 SENSORS_LIMIT((val * 10108 - 1205000) / 250000, 0, 255);
145 SENSORS_LIMIT((val * 41714 - 12050000) / 2500000, 0, 255);
148 static inline long IN_FROM_REG(u8 val, int inNum)
150 /* To avoid floating point, we multiply constants by 10 (100 for +12V).
151 We also multiply them by 1000 because we want 0.001V/bit for the
152 output value. Rounding is done. */
154 return (long) ((250000 * val + 1330000 + 21024 / 2) / 21024);
156 return (long) ((250000 * val + 1330000 + 15737 / 2) / 15737);
158 return (long) ((250000 * val + 1330000 + 10108 / 2) / 10108);
160 return (long) ((2500000 * val + 13300000 + 41714 / 2) / 41714);
163 /********* FAN RPM CONVERSIONS ********/
164 /* Higher register values = slower fans (the fan's strobe gates a counter).
165 But this chip saturates back at 0, not at 255 like all the other chips.
167 static inline u8 FAN_TO_REG(long rpm, int div)
171 rpm = SENSORS_LIMIT(rpm, 1, 1000000);
172 return SENSORS_LIMIT((1350000 + rpm * div / 2) / (rpm * div), 1, 255);
175 #define FAN_FROM_REG(val,div) ((val)==0?0:(val)==255?0:1350000/((val)*(div)))
177 /******** TEMP CONVERSIONS (Bob Dougherty) *********/
178 /* linear fits from HWMon.cpp (Copyright 1998-2000 Jonathan Teh Soon Yew)
180 return double(temp)*0.427-32.08;
181 else if(temp>=169 && temp<=202)
182 return double(temp)*0.582-58.16;
184 return double(temp)*0.924-127.33;
186 A fifth-order polynomial fits the unofficial data (provided by Alex van
187 Kaam <darkside@chello.nl>) a bit better. It also give more reasonable
188 numbers on my machine (ie. they agree with what my BIOS tells me).
189 Here's the fifth-order fit to the 8-bit data:
190 temp = 1.625093e-10*val^5 - 1.001632e-07*val^4 + 2.457653e-05*val^3 -
191 2.967619e-03*val^2 + 2.175144e-01*val - 7.090067e+0.
193 (2000-10-25- RFD: thanks to Uwe Andersen <uandersen@mayah.com> for
194 finding my typos in this formula!)
196 Alas, none of the elegant function-fit solutions will work because we
197 aren't allowed to use floating point in the kernel and doing it with
198 integers doesn't rpovide enough precision. So we'll do boring old
199 look-up table stuff. The unofficial data (see below) have effectively
200 7-bit resolution (they are rounded to the nearest degree). I'm assuming
201 that the transfer function of the device is monotonic and smooth, so a
202 smooth function fit to the data will allow us to get better precision.
203 I used the 5th-order poly fit described above and solved for
204 VIA register values 0-255. I *10 before rounding, so we get tenth-degree
205 precision. (I could have done all 1024 values for our 10-bit readings,
206 but the function is very linear in the useful range (0-80 deg C), so
207 we'll just use linear interpolation for 10-bit readings.) So, tempLUT
208 is the temp at via register values 0-255: */
209 static const long tempLUT[] =
210 { -709, -688, -667, -646, -627, -607, -589, -570, -553, -536, -519,
211 -503, -487, -471, -456, -442, -428, -414, -400, -387, -375,
212 -362, -350, -339, -327, -316, -305, -295, -285, -275, -265,
213 -255, -246, -237, -229, -220, -212, -204, -196, -188, -180,
214 -173, -166, -159, -152, -145, -139, -132, -126, -120, -114,
215 -108, -102, -96, -91, -85, -80, -74, -69, -64, -59, -54, -49,
216 -44, -39, -34, -29, -25, -20, -15, -11, -6, -2, 3, 7, 12, 16,
217 20, 25, 29, 33, 37, 42, 46, 50, 54, 59, 63, 67, 71, 75, 79, 84,
218 88, 92, 96, 100, 104, 109, 113, 117, 121, 125, 130, 134, 138,
219 142, 146, 151, 155, 159, 163, 168, 172, 176, 181, 185, 189,
220 193, 198, 202, 206, 211, 215, 219, 224, 228, 232, 237, 241,
221 245, 250, 254, 259, 263, 267, 272, 276, 281, 285, 290, 294,
222 299, 303, 307, 312, 316, 321, 325, 330, 334, 339, 344, 348,
223 353, 357, 362, 366, 371, 376, 380, 385, 390, 395, 399, 404,
224 409, 414, 419, 423, 428, 433, 438, 443, 449, 454, 459, 464,
225 469, 475, 480, 486, 491, 497, 502, 508, 514, 520, 526, 532,
226 538, 544, 551, 557, 564, 571, 578, 584, 592, 599, 606, 614,
227 621, 629, 637, 645, 654, 662, 671, 680, 689, 698, 708, 718,
228 728, 738, 749, 759, 770, 782, 793, 805, 818, 830, 843, 856,
229 870, 883, 898, 912, 927, 943, 958, 975, 991, 1008, 1026, 1044,
230 1062, 1081, 1101, 1121, 1141, 1162, 1184, 1206, 1229, 1252,
231 1276, 1301, 1326, 1352, 1378, 1406, 1434, 1462
234 /* the original LUT values from Alex van Kaam <darkside@chello.nl>
235 (for via register values 12-240):
236 {-50,-49,-47,-45,-43,-41,-39,-38,-37,-35,-34,-33,-32,-31,
237 -30,-29,-28,-27,-26,-25,-24,-24,-23,-22,-21,-20,-20,-19,-18,-17,-17,-16,-15,
238 -15,-14,-14,-13,-12,-12,-11,-11,-10,-9,-9,-8,-8,-7,-7,-6,-6,-5,-5,-4,-4,-3,
239 -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,
240 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,
241 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,
242 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,
243 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,
244 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,
245 85,86,88,89,91,92,94,96,97,99,101,103,105,107,109,110};
248 Here's the reverse LUT. I got it by doing a 6-th order poly fit (needed
249 an extra term for a good fit to these inverse data!) and then
250 solving for each temp value from -50 to 110 (the useable range for
251 this chip). Here's the fit:
252 viaRegVal = -1.160370e-10*val^6 +3.193693e-08*val^5 - 1.464447e-06*val^4
253 - 2.525453e-04*val^3 + 1.424593e-02*val^2 + 2.148941e+00*val +7.275808e+01)
255 static const u8 viaLUT[] =
256 { 12, 12, 13, 14, 14, 15, 16, 16, 17, 18, 18, 19, 20, 20, 21, 22, 23,
257 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 35, 36, 37, 39, 40,
258 41, 43, 45, 46, 48, 49, 51, 53, 55, 57, 59, 60, 62, 64, 66,
259 69, 71, 73, 75, 77, 79, 82, 84, 86, 88, 91, 93, 95, 98, 100,
260 103, 105, 107, 110, 112, 115, 117, 119, 122, 124, 126, 129,
261 131, 134, 136, 138, 140, 143, 145, 147, 150, 152, 154, 156,
262 158, 160, 162, 164, 166, 168, 170, 172, 174, 176, 178, 180,
263 182, 183, 185, 187, 188, 190, 192, 193, 195, 196, 198, 199,
264 200, 202, 203, 205, 206, 207, 208, 209, 210, 211, 212, 213,
265 214, 215, 216, 217, 218, 219, 220, 221, 222, 222, 223, 224,
266 225, 226, 226, 227, 228, 228, 229, 230, 230, 231, 232, 232,
267 233, 233, 234, 235, 235, 236, 236, 237, 237, 238, 238, 239,
271 /* Converting temps to (8-bit) hyst and over registers
272 No interpolation here.
273 The +50 is because the temps start at -50 */
274 static inline u8 TEMP_TO_REG(long val)
276 return viaLUT[val <= -50000 ? 0 : val >= 110000 ? 160 :
277 (val < 0 ? val - 500 : val + 500) / 1000 + 50];
280 /* for 8-bit temperature hyst and over registers */
281 #define TEMP_FROM_REG(val) (tempLUT[(val)] * 100)
283 /* for 10-bit temperature readings */
284 static inline long TEMP_FROM_REG10(u16 val)
286 u16 eightBits = val >> 2;
287 u16 twoBits = val & 3;
289 /* no interpolation for these */
290 if (twoBits == 0 || eightBits == 255)
291 return TEMP_FROM_REG(eightBits);
293 /* do some linear interpolation */
294 return (tempLUT[eightBits] * (4 - twoBits) +
295 tempLUT[eightBits + 1] * twoBits) * 25;
298 #define ALARMS_FROM_REG(val) (val)
300 #define DIV_FROM_REG(val) (1 << (val))
301 #define DIV_TO_REG(val) ((val)==8?3:(val)==4?2:(val)==1?0:1)
303 /* For the VIA686A, we need to keep some data in memory.
304 The structure is dynamically allocated, at the same time when a new
305 via686a client is allocated. */
306 struct via686a_data {
307 struct i2c_client client;
308 struct semaphore update_lock;
309 char valid; /* !=0 if following fields are valid */
310 unsigned long last_updated; /* In jiffies */
312 u8 in[5]; /* Register value */
313 u8 in_max[5]; /* Register value */
314 u8 in_min[5]; /* Register value */
315 u8 fan[2]; /* Register value */
316 u8 fan_min[2]; /* Register value */
317 u16 temp[3]; /* Register value 10 bit */
318 u8 temp_over[3]; /* Register value */
319 u8 temp_hyst[3]; /* Register value */
320 u8 fan_div[2]; /* Register encoding, shifted right */
321 u16 alarms; /* Register encoding, combined */
324 static struct pci_dev *s_bridge; /* pointer to the (only) via686a */
326 static int via686a_attach_adapter(struct i2c_adapter *adapter);
327 static int via686a_detect(struct i2c_adapter *adapter, int address, int kind);
328 static int via686a_detach_client(struct i2c_client *client);
330 static inline int via686a_read_value(struct i2c_client *client, u8 reg)
332 return (inb_p(client->addr + reg));
335 static inline void via686a_write_value(struct i2c_client *client, u8 reg,
338 outb_p(value, client->addr + reg);
341 static struct via686a_data *via686a_update_device(struct device *dev);
342 static void via686a_init_client(struct i2c_client *client);
344 /* following are the sysfs callback functions */
346 /* 7 voltage sensors */
347 static ssize_t show_in(struct device *dev, char *buf, int nr) {
348 struct via686a_data *data = via686a_update_device(dev);
349 return sprintf(buf, "%ld\n", IN_FROM_REG(data->in[nr], nr));
352 static ssize_t show_in_min(struct device *dev, char *buf, int nr) {
353 struct via686a_data *data = via686a_update_device(dev);
354 return sprintf(buf, "%ld\n", IN_FROM_REG(data->in_min[nr], nr));
357 static ssize_t show_in_max(struct device *dev, char *buf, int nr) {
358 struct via686a_data *data = via686a_update_device(dev);
359 return sprintf(buf, "%ld\n", IN_FROM_REG(data->in_max[nr], nr));
362 static ssize_t set_in_min(struct device *dev, const char *buf,
363 size_t count, int nr) {
364 struct i2c_client *client = to_i2c_client(dev);
365 struct via686a_data *data = i2c_get_clientdata(client);
366 unsigned long val = simple_strtoul(buf, NULL, 10);
367 data->in_min[nr] = IN_TO_REG(val,nr);
368 via686a_write_value(client, VIA686A_REG_IN_MIN(nr),
372 static ssize_t set_in_max(struct device *dev, const char *buf,
373 size_t count, int nr) {
374 struct i2c_client *client = to_i2c_client(dev);
375 struct via686a_data *data = i2c_get_clientdata(client);
376 unsigned long val = simple_strtoul(buf, NULL, 10);
377 data->in_max[nr] = IN_TO_REG(val,nr);
378 via686a_write_value(client, VIA686A_REG_IN_MAX(nr),
382 #define show_in_offset(offset) \
384 show_in##offset (struct device *dev, char *buf) \
386 return show_in(dev, buf, 0x##offset); \
389 show_in##offset##_min (struct device *dev, char *buf) \
391 return show_in_min(dev, buf, 0x##offset); \
394 show_in##offset##_max (struct device *dev, char *buf) \
396 return show_in_max(dev, buf, 0x##offset); \
398 static ssize_t set_in##offset##_min (struct device *dev, \
399 const char *buf, size_t count) \
401 return set_in_min(dev, buf, count, 0x##offset); \
403 static ssize_t set_in##offset##_max (struct device *dev, \
404 const char *buf, size_t count) \
406 return set_in_max(dev, buf, count, 0x##offset); \
408 static DEVICE_ATTR(in##offset##_input, S_IRUGO, show_in##offset, NULL) \
409 static DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \
410 show_in##offset##_min, set_in##offset##_min) \
411 static DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \
412 show_in##offset##_max, set_in##offset##_max)
421 static ssize_t show_temp(struct device *dev, char *buf, int nr) {
422 struct via686a_data *data = via686a_update_device(dev);
423 return sprintf(buf, "%ld\n", TEMP_FROM_REG10(data->temp[nr]));
425 static ssize_t show_temp_over(struct device *dev, char *buf, int nr) {
426 struct via686a_data *data = via686a_update_device(dev);
427 return sprintf(buf, "%ld\n", TEMP_FROM_REG(data->temp_over[nr]));
429 static ssize_t show_temp_hyst(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_hyst[nr]));
433 static ssize_t set_temp_over(struct device *dev, const char *buf,
434 size_t count, int nr) {
435 struct i2c_client *client = to_i2c_client(dev);
436 struct via686a_data *data = i2c_get_clientdata(client);
437 int val = simple_strtol(buf, NULL, 10);
438 data->temp_over[nr] = TEMP_TO_REG(val);
439 via686a_write_value(client, VIA686A_REG_TEMP_OVER(nr), data->temp_over[nr]);
442 static ssize_t set_temp_hyst(struct device *dev, const char *buf,
443 size_t count, int nr) {
444 struct i2c_client *client = to_i2c_client(dev);
445 struct via686a_data *data = i2c_get_clientdata(client);
446 int val = simple_strtol(buf, NULL, 10);
447 data->temp_hyst[nr] = TEMP_TO_REG(val);
448 via686a_write_value(client, VIA686A_REG_TEMP_HYST(nr), data->temp_hyst[nr]);
451 #define show_temp_offset(offset) \
452 static ssize_t show_temp_##offset (struct device *dev, char *buf) \
454 return show_temp(dev, buf, 0x##offset - 1); \
457 show_temp_##offset##_over (struct device *dev, char *buf) \
459 return show_temp_over(dev, buf, 0x##offset - 1); \
462 show_temp_##offset##_hyst (struct device *dev, char *buf) \
464 return show_temp_hyst(dev, buf, 0x##offset - 1); \
466 static ssize_t set_temp_##offset##_over (struct device *dev, \
467 const char *buf, size_t count) \
469 return set_temp_over(dev, buf, count, 0x##offset - 1); \
471 static ssize_t set_temp_##offset##_hyst (struct device *dev, \
472 const char *buf, size_t count) \
474 return set_temp_hyst(dev, buf, count, 0x##offset - 1); \
476 static DEVICE_ATTR(temp##offset##_input, S_IRUGO, show_temp_##offset, NULL) \
477 static DEVICE_ATTR(temp##offset##_max, S_IRUGO | S_IWUSR, \
478 show_temp_##offset##_over, set_temp_##offset##_over) \
479 static DEVICE_ATTR(temp##offset##_max_hyst, S_IRUGO | S_IWUSR, \
480 show_temp_##offset##_hyst, set_temp_##offset##_hyst)
487 static ssize_t show_fan(struct device *dev, char *buf, int nr) {
488 struct via686a_data *data = via686a_update_device(dev);
489 return sprintf(buf,"%d\n", FAN_FROM_REG(data->fan[nr],
490 DIV_FROM_REG(data->fan_div[nr])) );
492 static ssize_t show_fan_min(struct device *dev, char *buf, int nr) {
493 struct via686a_data *data = via686a_update_device(dev);
494 return sprintf(buf,"%d\n",
495 FAN_FROM_REG(data->fan_min[nr], DIV_FROM_REG(data->fan_div[nr])) );
497 static ssize_t show_fan_div(struct device *dev, char *buf, int nr) {
498 struct via686a_data *data = via686a_update_device(dev);
499 return sprintf(buf,"%d\n", DIV_FROM_REG(data->fan_div[nr]) );
501 static ssize_t set_fan_min(struct device *dev, const char *buf,
502 size_t count, int nr) {
503 struct i2c_client *client = to_i2c_client(dev);
504 struct via686a_data *data = i2c_get_clientdata(client);
505 int val = simple_strtol(buf, NULL, 10);
506 data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr]));
507 via686a_write_value(client, VIA686A_REG_FAN_MIN(nr+1), data->fan_min[nr]);
510 static ssize_t set_fan_div(struct device *dev, const char *buf,
511 size_t count, int nr) {
512 struct i2c_client *client = to_i2c_client(dev);
513 struct via686a_data *data = i2c_get_clientdata(client);
514 int val = simple_strtol(buf, NULL, 10);
515 int old = via686a_read_value(client, VIA686A_REG_FANDIV);
516 data->fan_div[nr] = DIV_TO_REG(val);
517 old = (old & 0x0f) | (data->fan_div[1] << 6) | (data->fan_div[0] << 4);
518 via686a_write_value(client, VIA686A_REG_FANDIV, old);
522 #define show_fan_offset(offset) \
523 static ssize_t show_fan_##offset (struct device *dev, char *buf) \
525 return show_fan(dev, buf, 0x##offset - 1); \
527 static ssize_t show_fan_##offset##_min (struct device *dev, char *buf) \
529 return show_fan_min(dev, buf, 0x##offset - 1); \
531 static ssize_t show_fan_##offset##_div (struct device *dev, char *buf) \
533 return show_fan_div(dev, buf, 0x##offset - 1); \
535 static ssize_t set_fan_##offset##_min (struct device *dev, \
536 const char *buf, size_t count) \
538 return set_fan_min(dev, buf, count, 0x##offset - 1); \
540 static ssize_t set_fan_##offset##_div (struct device *dev, \
541 const char *buf, size_t count) \
543 return set_fan_div(dev, buf, count, 0x##offset - 1); \
545 static DEVICE_ATTR(fan##offset##_input, S_IRUGO, show_fan_##offset, NULL) \
546 static DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \
547 show_fan_##offset##_min, set_fan_##offset##_min) \
548 static DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR, \
549 show_fan_##offset##_div, set_fan_##offset##_div)
555 static ssize_t show_alarms(struct device *dev, char *buf) {
556 struct via686a_data *data = via686a_update_device(dev);
557 return sprintf(buf,"%d\n", ALARMS_FROM_REG(data->alarms));
559 static DEVICE_ATTR(alarms, S_IRUGO | S_IWUSR, show_alarms, NULL);
561 /* The driver. I choose to use type i2c_driver, as at is identical to both
562 smbus_driver and isa_driver, and clients could be of either kind */
563 static struct i2c_driver via686a_driver = {
564 .owner = THIS_MODULE,
566 .id = I2C_DRIVERID_VIA686A,
567 .flags = I2C_DF_NOTIFY,
568 .attach_adapter = via686a_attach_adapter,
569 .detach_client = via686a_detach_client,
573 /* This is called when the module is loaded */
574 static int via686a_attach_adapter(struct i2c_adapter *adapter)
576 if (!(adapter->class & I2C_CLASS_HWMON))
578 return i2c_detect(adapter, &addr_data, via686a_detect);
581 static int via686a_detect(struct i2c_adapter *adapter, int address, int kind)
583 struct i2c_client *new_client;
584 struct via686a_data *data;
586 const char client_name[] = "via686a";
589 /* Make sure we are probing the ISA bus!! */
590 if (!i2c_is_isa_adapter(adapter)) {
591 dev_err(&adapter->dev,
592 "via686a_detect called for an I2C bus adapter?!?\n");
596 /* 8231 requires multiple of 256, we enforce that on 686 as well */
598 address = force_addr & 0xFF00;
601 dev_warn(&adapter->dev,"forcing ISA address 0x%04X\n", address);
602 if (PCIBIOS_SUCCESSFUL !=
603 pci_write_config_word(s_bridge, VIA686A_BASE_REG, address))
606 if (PCIBIOS_SUCCESSFUL !=
607 pci_read_config_word(s_bridge, VIA686A_ENABLE_REG, &val))
609 if (!(val & 0x0001)) {
610 dev_warn(&adapter->dev,"enabling sensors\n");
611 if (PCIBIOS_SUCCESSFUL !=
612 pci_write_config_word(s_bridge, VIA686A_ENABLE_REG,
617 /* Reserve the ISA region */
618 if (!request_region(address, VIA686A_EXTENT, "via686a-sensor")) {
619 dev_err(&adapter->dev,"region 0x%x already in use!\n",
624 if (!(data = kmalloc(sizeof(struct via686a_data), GFP_KERNEL))) {
628 memset(data, 0, sizeof(struct via686a_data));
630 new_client = &data->client;
631 i2c_set_clientdata(new_client, data);
632 new_client->addr = address;
633 new_client->adapter = adapter;
634 new_client->driver = &via686a_driver;
635 new_client->flags = 0;
636 new_client->dev.parent = &adapter->dev;
638 /* Fill in the remaining client fields and put into the global list */
639 snprintf(new_client->name, I2C_NAME_SIZE, client_name);
642 init_MUTEX(&data->update_lock);
643 /* Tell the I2C layer a new client has arrived */
644 if ((err = i2c_attach_client(new_client)))
647 /* Initialize the VIA686A chip */
648 via686a_init_client(new_client);
650 /* Register sysfs hooks */
651 device_create_file(&new_client->dev, &dev_attr_in0_input);
652 device_create_file(&new_client->dev, &dev_attr_in1_input);
653 device_create_file(&new_client->dev, &dev_attr_in2_input);
654 device_create_file(&new_client->dev, &dev_attr_in3_input);
655 device_create_file(&new_client->dev, &dev_attr_in4_input);
656 device_create_file(&new_client->dev, &dev_attr_in0_min);
657 device_create_file(&new_client->dev, &dev_attr_in1_min);
658 device_create_file(&new_client->dev, &dev_attr_in2_min);
659 device_create_file(&new_client->dev, &dev_attr_in3_min);
660 device_create_file(&new_client->dev, &dev_attr_in4_min);
661 device_create_file(&new_client->dev, &dev_attr_in0_max);
662 device_create_file(&new_client->dev, &dev_attr_in1_max);
663 device_create_file(&new_client->dev, &dev_attr_in2_max);
664 device_create_file(&new_client->dev, &dev_attr_in3_max);
665 device_create_file(&new_client->dev, &dev_attr_in4_max);
666 device_create_file(&new_client->dev, &dev_attr_temp1_input);
667 device_create_file(&new_client->dev, &dev_attr_temp2_input);
668 device_create_file(&new_client->dev, &dev_attr_temp3_input);
669 device_create_file(&new_client->dev, &dev_attr_temp1_max);
670 device_create_file(&new_client->dev, &dev_attr_temp2_max);
671 device_create_file(&new_client->dev, &dev_attr_temp3_max);
672 device_create_file(&new_client->dev, &dev_attr_temp1_max_hyst);
673 device_create_file(&new_client->dev, &dev_attr_temp2_max_hyst);
674 device_create_file(&new_client->dev, &dev_attr_temp3_max_hyst);
675 device_create_file(&new_client->dev, &dev_attr_fan1_input);
676 device_create_file(&new_client->dev, &dev_attr_fan2_input);
677 device_create_file(&new_client->dev, &dev_attr_fan1_min);
678 device_create_file(&new_client->dev, &dev_attr_fan2_min);
679 device_create_file(&new_client->dev, &dev_attr_fan1_div);
680 device_create_file(&new_client->dev, &dev_attr_fan2_div);
681 device_create_file(&new_client->dev, &dev_attr_alarms);
688 release_region(address, VIA686A_EXTENT);
692 static int via686a_detach_client(struct i2c_client *client)
696 if ((err = i2c_detach_client(client))) {
697 dev_err(&client->dev,
698 "Client deregistration failed, client not detached.\n");
702 release_region(client->addr, VIA686A_EXTENT);
703 kfree(i2c_get_clientdata(client));
708 /* Called when we have found a new VIA686A. Set limits, etc. */
709 static void via686a_init_client(struct i2c_client *client)
713 /* Start monitoring */
714 reg = via686a_read_value(client, VIA686A_REG_CONFIG);
715 via686a_write_value(client, VIA686A_REG_CONFIG, (reg|0x01)&0x7F);
717 /* Configure temp interrupt mode for continuous-interrupt operation */
718 via686a_write_value(client, VIA686A_REG_TEMP_MODE,
719 via686a_read_value(client, VIA686A_REG_TEMP_MODE) &
720 !(VIA686A_TEMP_MODE_MASK | VIA686A_TEMP_MODE_CONTINUOUS));
723 static struct via686a_data *via686a_update_device(struct device *dev)
725 struct i2c_client *client = to_i2c_client(dev);
726 struct via686a_data *data = i2c_get_clientdata(client);
729 down(&data->update_lock);
731 if ((jiffies - data->last_updated > HZ + HZ / 2) ||
732 (jiffies < data->last_updated) || !data->valid) {
734 for (i = 0; i <= 4; i++) {
736 via686a_read_value(client, VIA686A_REG_IN(i));
737 data->in_min[i] = via686a_read_value(client,
741 via686a_read_value(client, VIA686A_REG_IN_MAX(i));
743 for (i = 1; i <= 2; i++) {
745 via686a_read_value(client, VIA686A_REG_FAN(i));
746 data->fan_min[i - 1] = via686a_read_value(client,
747 VIA686A_REG_FAN_MIN(i));
749 for (i = 0; i <= 2; i++) {
750 data->temp[i] = via686a_read_value(client,
751 VIA686A_REG_TEMP(i)) << 2;
753 via686a_read_value(client,
754 VIA686A_REG_TEMP_OVER(i));
756 via686a_read_value(client,
757 VIA686A_REG_TEMP_HYST(i));
759 /* add in lower 2 bits
760 temp1 uses bits 7-6 of VIA686A_REG_TEMP_LOW1
761 temp2 uses bits 5-4 of VIA686A_REG_TEMP_LOW23
762 temp3 uses bits 7-6 of VIA686A_REG_TEMP_LOW23
764 data->temp[0] |= (via686a_read_value(client,
765 VIA686A_REG_TEMP_LOW1)
768 (via686a_read_value(client, VIA686A_REG_TEMP_LOW23) &
771 (via686a_read_value(client, VIA686A_REG_TEMP_LOW23) &
774 i = via686a_read_value(client, VIA686A_REG_FANDIV);
775 data->fan_div[0] = (i >> 4) & 0x03;
776 data->fan_div[1] = i >> 6;
778 via686a_read_value(client,
779 VIA686A_REG_ALARM1) |
780 (via686a_read_value(client, VIA686A_REG_ALARM2) << 8);
781 data->last_updated = jiffies;
785 up(&data->update_lock);
790 static struct pci_device_id via686a_pci_ids[] = {
792 .vendor = PCI_VENDOR_ID_VIA,
793 .device = PCI_DEVICE_ID_VIA_82C686_4,
794 .subvendor = PCI_ANY_ID,
795 .subdevice = PCI_ANY_ID,
800 static int __devinit via686a_pci_probe(struct pci_dev *dev,
801 const struct pci_device_id *id)
806 if (PCIBIOS_SUCCESSFUL !=
807 pci_read_config_word(dev, VIA686A_BASE_REG, &val))
810 addr = val & ~(VIA686A_EXTENT - 1);
811 if (addr == 0 && force_addr == 0) {
812 dev_err(&dev->dev,"base address not set - upgrade BIOS or use force_addr=0xaddr\n");
816 addr = force_addr; /* so detect will get called */
819 dev_err(&dev->dev,"No Via 686A sensors found.\n");
822 normal_isa[0] = addr;
824 return i2c_add_driver(&via686a_driver);
827 static void __devexit via686a_pci_remove(struct pci_dev *dev)
829 i2c_del_driver(&via686a_driver);
832 static struct pci_driver via686a_pci_driver = {
834 .id_table = via686a_pci_ids,
835 .probe = via686a_pci_probe,
836 .remove = __devexit_p(via686a_pci_remove),
839 static int __init sm_via686a_init(void)
841 return pci_module_init(&via686a_pci_driver);
844 static void __exit sm_via686a_exit(void)
846 pci_unregister_driver(&via686a_pci_driver);
849 MODULE_AUTHOR("Kyösti Mälkki <kmalkki@cc.hut.fi>, "
850 "Mark Studebaker <mdsxyz123@yahoo.com> "
851 "and Bob Dougherty <bobd@stanford.edu>");
852 MODULE_DESCRIPTION("VIA 686A Sensor device");
853 MODULE_LICENSE("GPL");
855 module_init(sm_via686a_init);
856 module_exit(sm_via686a_exit);