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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 via686a.c - Part of lm_sensors, Linux kernel modules
3 for hardware monitoring
4
5 Copyright (c) 1998 - 2002 Frodo Looijaard <frodol@dds.nl>,
6 Kyösti Mälkki <kmalkki@cc.hut.fi>,
7 Mark Studebaker <mdsxyz123@yahoo.com>,
8 and Bob Dougherty <bobd@stanford.edu>
9 (Some conversion-factor data were contributed by Jonathan Teh Soon Yew
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
Linus Torvalds1da177e2005-04-16 15:20:36 -070033#include <linux/module.h>
34#include <linux/slab.h>
35#include <linux/pci.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070036#include <linux/jiffies.h>
37#include <linux/i2c.h>
38#include <linux/i2c-sensor.h>
39#include <linux/init.h>
40#include <asm/io.h>
41
42
43/* If force_addr is set to anything different from 0, we forcibly enable
44 the device at the given address. */
45static unsigned short force_addr = 0;
46module_param(force_addr, ushort, 0);
47MODULE_PARM_DESC(force_addr,
48 "Initialize the base address of the sensors");
49
50/* Addresses to scan.
51 Note that we can't determine the ISA address until we have initialized
52 our module */
53static unsigned short normal_i2c[] = { I2C_CLIENT_END };
54static unsigned int normal_isa[] = { 0x0000, I2C_CLIENT_ISA_END };
55
56/* Insmod parameters */
57SENSORS_INSMOD_1(via686a);
58
59/*
60 The Via 686a southbridge has a LM78-like chip integrated on the same IC.
61 This driver is a customized copy of lm78.c
62*/
63
64/* Many VIA686A constants specified below */
65
66/* Length of ISA address segment */
67#define VIA686A_EXTENT 0x80
68#define VIA686A_BASE_REG 0x70
69#define VIA686A_ENABLE_REG 0x74
70
71/* The VIA686A registers */
72/* ins numbered 0-4 */
73#define VIA686A_REG_IN_MAX(nr) (0x2b + ((nr) * 2))
74#define VIA686A_REG_IN_MIN(nr) (0x2c + ((nr) * 2))
75#define VIA686A_REG_IN(nr) (0x22 + (nr))
76
77/* fans numbered 1-2 */
78#define VIA686A_REG_FAN_MIN(nr) (0x3a + (nr))
79#define VIA686A_REG_FAN(nr) (0x28 + (nr))
80
81/* the following values are as speced by VIA: */
82static const u8 regtemp[] = { 0x20, 0x21, 0x1f };
83static const u8 regover[] = { 0x39, 0x3d, 0x1d };
84static const u8 reghyst[] = { 0x3a, 0x3e, 0x1e };
85
86/* temps numbered 1-3 */
87#define VIA686A_REG_TEMP(nr) (regtemp[nr])
88#define VIA686A_REG_TEMP_OVER(nr) (regover[nr])
89#define VIA686A_REG_TEMP_HYST(nr) (reghyst[nr])
90#define VIA686A_REG_TEMP_LOW1 0x4b // bits 7-6
91#define VIA686A_REG_TEMP_LOW23 0x49 // 2 = bits 5-4, 3 = bits 7-6
92
93#define VIA686A_REG_ALARM1 0x41
94#define VIA686A_REG_ALARM2 0x42
95#define VIA686A_REG_FANDIV 0x47
96#define VIA686A_REG_CONFIG 0x40
97/* The following register sets temp interrupt mode (bits 1-0 for temp1,
98 3-2 for temp2, 5-4 for temp3). Modes are:
99 00 interrupt stays as long as value is out-of-range
100 01 interrupt is cleared once register is read (default)
101 10 comparator mode- like 00, but ignores hysteresis
102 11 same as 00 */
103#define VIA686A_REG_TEMP_MODE 0x4b
104/* We'll just assume that you want to set all 3 simultaneously: */
105#define VIA686A_TEMP_MODE_MASK 0x3F
106#define VIA686A_TEMP_MODE_CONTINUOUS (0x00)
107
108/* Conversions. Limit checking is only done on the TO_REG
109 variants.
110
111********* VOLTAGE CONVERSIONS (Bob Dougherty) ********
112 From HWMon.cpp (Copyright 1998-2000 Jonathan Teh Soon Yew):
113 voltagefactor[0]=1.25/2628; (2628/1.25=2102.4) // Vccp
114 voltagefactor[1]=1.25/2628; (2628/1.25=2102.4) // +2.5V
115 voltagefactor[2]=1.67/2628; (2628/1.67=1573.7) // +3.3V
116 voltagefactor[3]=2.6/2628; (2628/2.60=1010.8) // +5V
117 voltagefactor[4]=6.3/2628; (2628/6.30=417.14) // +12V
118 in[i]=(data[i+2]*25.0+133)*voltagefactor[i];
119 That is:
120 volts = (25*regVal+133)*factor
121 regVal = (volts/factor-133)/25
122 (These conversions were contributed by Jonathan Teh Soon Yew
123 <j.teh@iname.com>) */
124static inline u8 IN_TO_REG(long val, int inNum)
125{
126 /* To avoid floating point, we multiply constants by 10 (100 for +12V).
127 Rounding is done (120500 is actually 133000 - 12500).
128 Remember that val is expressed in 0.001V/bit, which is why we divide
129 by an additional 10000 (100000 for +12V): 1000 for val and 10 (100)
130 for the constants. */
131 if (inNum <= 1)
132 return (u8)
133 SENSORS_LIMIT((val * 21024 - 1205000) / 250000, 0, 255);
134 else if (inNum == 2)
135 return (u8)
136 SENSORS_LIMIT((val * 15737 - 1205000) / 250000, 0, 255);
137 else if (inNum == 3)
138 return (u8)
139 SENSORS_LIMIT((val * 10108 - 1205000) / 250000, 0, 255);
140 else
141 return (u8)
142 SENSORS_LIMIT((val * 41714 - 12050000) / 2500000, 0, 255);
143}
144
145static inline long IN_FROM_REG(u8 val, int inNum)
146{
147 /* To avoid floating point, we multiply constants by 10 (100 for +12V).
148 We also multiply them by 1000 because we want 0.001V/bit for the
149 output value. Rounding is done. */
150 if (inNum <= 1)
151 return (long) ((250000 * val + 1330000 + 21024 / 2) / 21024);
152 else if (inNum == 2)
153 return (long) ((250000 * val + 1330000 + 15737 / 2) / 15737);
154 else if (inNum == 3)
155 return (long) ((250000 * val + 1330000 + 10108 / 2) / 10108);
156 else
157 return (long) ((2500000 * val + 13300000 + 41714 / 2) / 41714);
158}
159
160/********* FAN RPM CONVERSIONS ********/
161/* Higher register values = slower fans (the fan's strobe gates a counter).
162 But this chip saturates back at 0, not at 255 like all the other chips.
163 So, 0 means 0 RPM */
164static inline u8 FAN_TO_REG(long rpm, int div)
165{
166 if (rpm == 0)
167 return 0;
168 rpm = SENSORS_LIMIT(rpm, 1, 1000000);
169 return SENSORS_LIMIT((1350000 + rpm * div / 2) / (rpm * div), 1, 255);
170}
171
172#define FAN_FROM_REG(val,div) ((val)==0?0:(val)==255?0:1350000/((val)*(div)))
173
174/******** TEMP CONVERSIONS (Bob Dougherty) *********/
175/* linear fits from HWMon.cpp (Copyright 1998-2000 Jonathan Teh Soon Yew)
176 if(temp<169)
177 return double(temp)*0.427-32.08;
178 else if(temp>=169 && temp<=202)
179 return double(temp)*0.582-58.16;
180 else
181 return double(temp)*0.924-127.33;
182
183 A fifth-order polynomial fits the unofficial data (provided by Alex van
184 Kaam <darkside@chello.nl>) a bit better. It also give more reasonable
185 numbers on my machine (ie. they agree with what my BIOS tells me).
186 Here's the fifth-order fit to the 8-bit data:
187 temp = 1.625093e-10*val^5 - 1.001632e-07*val^4 + 2.457653e-05*val^3 -
188 2.967619e-03*val^2 + 2.175144e-01*val - 7.090067e+0.
189
190 (2000-10-25- RFD: thanks to Uwe Andersen <uandersen@mayah.com> for
191 finding my typos in this formula!)
192
193 Alas, none of the elegant function-fit solutions will work because we
194 aren't allowed to use floating point in the kernel and doing it with
195 integers doesn't rpovide enough precision. So we'll do boring old
196 look-up table stuff. The unofficial data (see below) have effectively
197 7-bit resolution (they are rounded to the nearest degree). I'm assuming
198 that the transfer function of the device is monotonic and smooth, so a
199 smooth function fit to the data will allow us to get better precision.
200 I used the 5th-order poly fit described above and solved for
201 VIA register values 0-255. I *10 before rounding, so we get tenth-degree
202 precision. (I could have done all 1024 values for our 10-bit readings,
203 but the function is very linear in the useful range (0-80 deg C), so
204 we'll just use linear interpolation for 10-bit readings.) So, tempLUT
205 is the temp at via register values 0-255: */
206static const long tempLUT[] =
207 { -709, -688, -667, -646, -627, -607, -589, -570, -553, -536, -519,
208 -503, -487, -471, -456, -442, -428, -414, -400, -387, -375,
209 -362, -350, -339, -327, -316, -305, -295, -285, -275, -265,
210 -255, -246, -237, -229, -220, -212, -204, -196, -188, -180,
211 -173, -166, -159, -152, -145, -139, -132, -126, -120, -114,
212 -108, -102, -96, -91, -85, -80, -74, -69, -64, -59, -54, -49,
213 -44, -39, -34, -29, -25, -20, -15, -11, -6, -2, 3, 7, 12, 16,
214 20, 25, 29, 33, 37, 42, 46, 50, 54, 59, 63, 67, 71, 75, 79, 84,
215 88, 92, 96, 100, 104, 109, 113, 117, 121, 125, 130, 134, 138,
216 142, 146, 151, 155, 159, 163, 168, 172, 176, 181, 185, 189,
217 193, 198, 202, 206, 211, 215, 219, 224, 228, 232, 237, 241,
218 245, 250, 254, 259, 263, 267, 272, 276, 281, 285, 290, 294,
219 299, 303, 307, 312, 316, 321, 325, 330, 334, 339, 344, 348,
220 353, 357, 362, 366, 371, 376, 380, 385, 390, 395, 399, 404,
221 409, 414, 419, 423, 428, 433, 438, 443, 449, 454, 459, 464,
222 469, 475, 480, 486, 491, 497, 502, 508, 514, 520, 526, 532,
223 538, 544, 551, 557, 564, 571, 578, 584, 592, 599, 606, 614,
224 621, 629, 637, 645, 654, 662, 671, 680, 689, 698, 708, 718,
225 728, 738, 749, 759, 770, 782, 793, 805, 818, 830, 843, 856,
226 870, 883, 898, 912, 927, 943, 958, 975, 991, 1008, 1026, 1044,
227 1062, 1081, 1101, 1121, 1141, 1162, 1184, 1206, 1229, 1252,
228 1276, 1301, 1326, 1352, 1378, 1406, 1434, 1462
229};
230
231/* the original LUT values from Alex van Kaam <darkside@chello.nl>
232 (for via register values 12-240):
233{-50,-49,-47,-45,-43,-41,-39,-38,-37,-35,-34,-33,-32,-31,
234-30,-29,-28,-27,-26,-25,-24,-24,-23,-22,-21,-20,-20,-19,-18,-17,-17,-16,-15,
235-15,-14,-14,-13,-12,-12,-11,-11,-10,-9,-9,-8,-8,-7,-7,-6,-6,-5,-5,-4,-4,-3,
236-3,-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,
23712,12,13,13,13,14,14,15,15,16,16,16,17,17,18,18,19,19,20,20,21,21,21,22,22,
23822,23,23,24,24,25,25,26,26,26,27,27,27,28,28,29,29,30,30,30,31,31,32,32,33,
23933,34,34,35,35,35,36,36,37,37,38,38,39,39,40,40,41,41,42,42,43,43,44,44,45,
24045,46,46,47,48,48,49,49,50,51,51,52,52,53,53,54,55,55,56,57,57,58,59,59,60,
24161,62,62,63,64,65,66,66,67,68,69,70,71,72,73,74,75,76,77,78,79,80,81,83,84,
24285,86,88,89,91,92,94,96,97,99,101,103,105,107,109,110};
243
244
245 Here's the reverse LUT. I got it by doing a 6-th order poly fit (needed
246 an extra term for a good fit to these inverse data!) and then
247 solving for each temp value from -50 to 110 (the useable range for
248 this chip). Here's the fit:
249 viaRegVal = -1.160370e-10*val^6 +3.193693e-08*val^5 - 1.464447e-06*val^4
250 - 2.525453e-04*val^3 + 1.424593e-02*val^2 + 2.148941e+00*val +7.275808e+01)
251 Note that n=161: */
252static const u8 viaLUT[] =
253 { 12, 12, 13, 14, 14, 15, 16, 16, 17, 18, 18, 19, 20, 20, 21, 22, 23,
254 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 35, 36, 37, 39, 40,
255 41, 43, 45, 46, 48, 49, 51, 53, 55, 57, 59, 60, 62, 64, 66,
256 69, 71, 73, 75, 77, 79, 82, 84, 86, 88, 91, 93, 95, 98, 100,
257 103, 105, 107, 110, 112, 115, 117, 119, 122, 124, 126, 129,
258 131, 134, 136, 138, 140, 143, 145, 147, 150, 152, 154, 156,
259 158, 160, 162, 164, 166, 168, 170, 172, 174, 176, 178, 180,
260 182, 183, 185, 187, 188, 190, 192, 193, 195, 196, 198, 199,
261 200, 202, 203, 205, 206, 207, 208, 209, 210, 211, 212, 213,
262 214, 215, 216, 217, 218, 219, 220, 221, 222, 222, 223, 224,
263 225, 226, 226, 227, 228, 228, 229, 230, 230, 231, 232, 232,
264 233, 233, 234, 235, 235, 236, 236, 237, 237, 238, 238, 239,
265 239, 240
266};
267
268/* Converting temps to (8-bit) hyst and over registers
269 No interpolation here.
270 The +50 is because the temps start at -50 */
271static inline u8 TEMP_TO_REG(long val)
272{
273 return viaLUT[val <= -50000 ? 0 : val >= 110000 ? 160 :
274 (val < 0 ? val - 500 : val + 500) / 1000 + 50];
275}
276
277/* for 8-bit temperature hyst and over registers */
278#define TEMP_FROM_REG(val) (tempLUT[(val)] * 100)
279
280/* for 10-bit temperature readings */
281static inline long TEMP_FROM_REG10(u16 val)
282{
283 u16 eightBits = val >> 2;
284 u16 twoBits = val & 3;
285
286 /* no interpolation for these */
287 if (twoBits == 0 || eightBits == 255)
288 return TEMP_FROM_REG(eightBits);
289
290 /* do some linear interpolation */
291 return (tempLUT[eightBits] * (4 - twoBits) +
292 tempLUT[eightBits + 1] * twoBits) * 25;
293}
294
295#define ALARMS_FROM_REG(val) (val)
296
297#define DIV_FROM_REG(val) (1 << (val))
298#define DIV_TO_REG(val) ((val)==8?3:(val)==4?2:(val)==1?0:1)
299
300/* For the VIA686A, we need to keep some data in memory.
301 The structure is dynamically allocated, at the same time when a new
302 via686a client is allocated. */
303struct via686a_data {
304 struct i2c_client client;
305 struct semaphore update_lock;
306 char valid; /* !=0 if following fields are valid */
307 unsigned long last_updated; /* In jiffies */
308
309 u8 in[5]; /* Register value */
310 u8 in_max[5]; /* Register value */
311 u8 in_min[5]; /* Register value */
312 u8 fan[2]; /* Register value */
313 u8 fan_min[2]; /* Register value */
314 u16 temp[3]; /* Register value 10 bit */
315 u8 temp_over[3]; /* Register value */
316 u8 temp_hyst[3]; /* Register value */
317 u8 fan_div[2]; /* Register encoding, shifted right */
318 u16 alarms; /* Register encoding, combined */
319};
320
321static struct pci_dev *s_bridge; /* pointer to the (only) via686a */
322
323static int via686a_attach_adapter(struct i2c_adapter *adapter);
324static int via686a_detect(struct i2c_adapter *adapter, int address, int kind);
325static int via686a_detach_client(struct i2c_client *client);
326
327static inline int via686a_read_value(struct i2c_client *client, u8 reg)
328{
329 return (inb_p(client->addr + reg));
330}
331
332static inline void via686a_write_value(struct i2c_client *client, u8 reg,
333 u8 value)
334{
335 outb_p(value, client->addr + reg);
336}
337
338static struct via686a_data *via686a_update_device(struct device *dev);
339static void via686a_init_client(struct i2c_client *client);
340
341/* following are the sysfs callback functions */
342
343/* 7 voltage sensors */
344static ssize_t show_in(struct device *dev, char *buf, int nr) {
345 struct via686a_data *data = via686a_update_device(dev);
346 return sprintf(buf, "%ld\n", IN_FROM_REG(data->in[nr], nr));
347}
348
349static ssize_t show_in_min(struct device *dev, char *buf, int nr) {
350 struct via686a_data *data = via686a_update_device(dev);
351 return sprintf(buf, "%ld\n", IN_FROM_REG(data->in_min[nr], nr));
352}
353
354static ssize_t show_in_max(struct device *dev, char *buf, int nr) {
355 struct via686a_data *data = via686a_update_device(dev);
356 return sprintf(buf, "%ld\n", IN_FROM_REG(data->in_max[nr], nr));
357}
358
359static ssize_t set_in_min(struct device *dev, const char *buf,
360 size_t count, int nr) {
361 struct i2c_client *client = to_i2c_client(dev);
362 struct via686a_data *data = i2c_get_clientdata(client);
363 unsigned long val = simple_strtoul(buf, NULL, 10);
364
365 down(&data->update_lock);
366 data->in_min[nr] = IN_TO_REG(val,nr);
367 via686a_write_value(client, VIA686A_REG_IN_MIN(nr),
368 data->in_min[nr]);
369 up(&data->update_lock);
370 return count;
371}
372static 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
378 down(&data->update_lock);
379 data->in_max[nr] = IN_TO_REG(val,nr);
380 via686a_write_value(client, VIA686A_REG_IN_MAX(nr),
381 data->in_max[nr]);
382 up(&data->update_lock);
383 return count;
384}
385#define show_in_offset(offset) \
386static ssize_t \
Yani Ioannoua5099cf2005-05-17 06:42:25 -0400387 show_in##offset (struct device *dev, struct device_attribute *attr, char *buf) \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700388{ \
389 return show_in(dev, buf, offset); \
390} \
391static ssize_t \
Yani Ioannoua5099cf2005-05-17 06:42:25 -0400392 show_in##offset##_min (struct device *dev, struct device_attribute *attr, char *buf) \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700393{ \
394 return show_in_min(dev, buf, offset); \
395} \
396static ssize_t \
Yani Ioannoua5099cf2005-05-17 06:42:25 -0400397 show_in##offset##_max (struct device *dev, struct device_attribute *attr, char *buf) \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700398{ \
399 return show_in_max(dev, buf, offset); \
400} \
Yani Ioannoua5099cf2005-05-17 06:42:25 -0400401static ssize_t set_in##offset##_min (struct device *dev, struct device_attribute *attr, \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700402 const char *buf, size_t count) \
403{ \
404 return set_in_min(dev, buf, count, offset); \
405} \
Yani Ioannoua5099cf2005-05-17 06:42:25 -0400406static ssize_t set_in##offset##_max (struct device *dev, struct device_attribute *attr, \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700407 const char *buf, size_t count) \
408{ \
409 return set_in_max(dev, buf, count, offset); \
410} \
411static DEVICE_ATTR(in##offset##_input, S_IRUGO, show_in##offset, NULL);\
412static DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \
413 show_in##offset##_min, set_in##offset##_min); \
414static DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \
415 show_in##offset##_max, set_in##offset##_max);
416
417show_in_offset(0);
418show_in_offset(1);
419show_in_offset(2);
420show_in_offset(3);
421show_in_offset(4);
422
423/* 3 temperatures */
424static ssize_t show_temp(struct device *dev, char *buf, int nr) {
425 struct via686a_data *data = via686a_update_device(dev);
426 return sprintf(buf, "%ld\n", TEMP_FROM_REG10(data->temp[nr]));
427}
428static ssize_t show_temp_over(struct device *dev, char *buf, int nr) {
429 struct via686a_data *data = via686a_update_device(dev);
430 return sprintf(buf, "%ld\n", TEMP_FROM_REG(data->temp_over[nr]));
431}
432static ssize_t show_temp_hyst(struct device *dev, char *buf, int nr) {
433 struct via686a_data *data = via686a_update_device(dev);
434 return sprintf(buf, "%ld\n", TEMP_FROM_REG(data->temp_hyst[nr]));
435}
436static ssize_t set_temp_over(struct device *dev, const char *buf,
437 size_t count, int nr) {
438 struct i2c_client *client = to_i2c_client(dev);
439 struct via686a_data *data = i2c_get_clientdata(client);
440 int val = simple_strtol(buf, NULL, 10);
441
442 down(&data->update_lock);
443 data->temp_over[nr] = TEMP_TO_REG(val);
444 via686a_write_value(client, VIA686A_REG_TEMP_OVER(nr), data->temp_over[nr]);
445 up(&data->update_lock);
446 return count;
447}
448static ssize_t set_temp_hyst(struct device *dev, const char *buf,
449 size_t count, int nr) {
450 struct i2c_client *client = to_i2c_client(dev);
451 struct via686a_data *data = i2c_get_clientdata(client);
452 int val = simple_strtol(buf, NULL, 10);
453
454 down(&data->update_lock);
455 data->temp_hyst[nr] = TEMP_TO_REG(val);
456 via686a_write_value(client, VIA686A_REG_TEMP_HYST(nr), data->temp_hyst[nr]);
457 up(&data->update_lock);
458 return count;
459}
460#define show_temp_offset(offset) \
Yani Ioannoua5099cf2005-05-17 06:42:25 -0400461static ssize_t show_temp_##offset (struct device *dev, struct device_attribute *attr, char *buf) \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700462{ \
463 return show_temp(dev, buf, offset - 1); \
464} \
465static ssize_t \
Yani Ioannoua5099cf2005-05-17 06:42:25 -0400466show_temp_##offset##_over (struct device *dev, struct device_attribute *attr, char *buf) \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700467{ \
468 return show_temp_over(dev, buf, offset - 1); \
469} \
470static ssize_t \
Yani Ioannoua5099cf2005-05-17 06:42:25 -0400471show_temp_##offset##_hyst (struct device *dev, struct device_attribute *attr, char *buf) \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700472{ \
473 return show_temp_hyst(dev, buf, offset - 1); \
474} \
Yani Ioannoua5099cf2005-05-17 06:42:25 -0400475static ssize_t set_temp_##offset##_over (struct device *dev, struct device_attribute *attr, \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700476 const char *buf, size_t count) \
477{ \
478 return set_temp_over(dev, buf, count, offset - 1); \
479} \
Yani Ioannoua5099cf2005-05-17 06:42:25 -0400480static ssize_t set_temp_##offset##_hyst (struct device *dev, struct device_attribute *attr, \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700481 const char *buf, size_t count) \
482{ \
483 return set_temp_hyst(dev, buf, count, offset - 1); \
484} \
485static DEVICE_ATTR(temp##offset##_input, S_IRUGO, show_temp_##offset, NULL);\
486static DEVICE_ATTR(temp##offset##_max, S_IRUGO | S_IWUSR, \
487 show_temp_##offset##_over, set_temp_##offset##_over); \
488static DEVICE_ATTR(temp##offset##_max_hyst, S_IRUGO | S_IWUSR, \
489 show_temp_##offset##_hyst, set_temp_##offset##_hyst);
490
491show_temp_offset(1);
492show_temp_offset(2);
493show_temp_offset(3);
494
495/* 2 Fans */
496static ssize_t show_fan(struct device *dev, char *buf, int nr) {
497 struct via686a_data *data = via686a_update_device(dev);
498 return sprintf(buf,"%d\n", FAN_FROM_REG(data->fan[nr],
499 DIV_FROM_REG(data->fan_div[nr])) );
500}
501static ssize_t show_fan_min(struct device *dev, char *buf, int nr) {
502 struct via686a_data *data = via686a_update_device(dev);
503 return sprintf(buf,"%d\n",
504 FAN_FROM_REG(data->fan_min[nr], DIV_FROM_REG(data->fan_div[nr])) );
505}
506static ssize_t show_fan_div(struct device *dev, char *buf, int nr) {
507 struct via686a_data *data = via686a_update_device(dev);
508 return sprintf(buf,"%d\n", DIV_FROM_REG(data->fan_div[nr]) );
509}
510static ssize_t set_fan_min(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
516 down(&data->update_lock);
517 data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr]));
518 via686a_write_value(client, VIA686A_REG_FAN_MIN(nr+1), data->fan_min[nr]);
519 up(&data->update_lock);
520 return count;
521}
522static ssize_t set_fan_div(struct device *dev, const char *buf,
523 size_t count, int nr) {
524 struct i2c_client *client = to_i2c_client(dev);
525 struct via686a_data *data = i2c_get_clientdata(client);
526 int val = simple_strtol(buf, NULL, 10);
527 int old;
528
529 down(&data->update_lock);
530 old = via686a_read_value(client, VIA686A_REG_FANDIV);
531 data->fan_div[nr] = DIV_TO_REG(val);
532 old = (old & 0x0f) | (data->fan_div[1] << 6) | (data->fan_div[0] << 4);
533 via686a_write_value(client, VIA686A_REG_FANDIV, old);
534 up(&data->update_lock);
535 return count;
536}
537
538#define show_fan_offset(offset) \
Yani Ioannoua5099cf2005-05-17 06:42:25 -0400539static ssize_t show_fan_##offset (struct device *dev, struct device_attribute *attr, char *buf) \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700540{ \
541 return show_fan(dev, buf, offset - 1); \
542} \
Yani Ioannoua5099cf2005-05-17 06:42:25 -0400543static ssize_t show_fan_##offset##_min (struct device *dev, struct device_attribute *attr, char *buf) \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700544{ \
545 return show_fan_min(dev, buf, offset - 1); \
546} \
Yani Ioannoua5099cf2005-05-17 06:42:25 -0400547static ssize_t show_fan_##offset##_div (struct device *dev, struct device_attribute *attr, char *buf) \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700548{ \
549 return show_fan_div(dev, buf, offset - 1); \
550} \
Yani Ioannoua5099cf2005-05-17 06:42:25 -0400551static ssize_t set_fan_##offset##_min (struct device *dev, struct device_attribute *attr, \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700552 const char *buf, size_t count) \
553{ \
554 return set_fan_min(dev, buf, count, offset - 1); \
555} \
Yani Ioannoua5099cf2005-05-17 06:42:25 -0400556static ssize_t set_fan_##offset##_div (struct device *dev, struct device_attribute *attr, \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700557 const char *buf, size_t count) \
558{ \
559 return set_fan_div(dev, buf, count, offset - 1); \
560} \
561static DEVICE_ATTR(fan##offset##_input, S_IRUGO, show_fan_##offset, NULL);\
562static DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \
563 show_fan_##offset##_min, set_fan_##offset##_min); \
564static DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR, \
565 show_fan_##offset##_div, set_fan_##offset##_div);
566
567show_fan_offset(1);
568show_fan_offset(2);
569
570/* Alarms */
Yani Ioannoua5099cf2005-05-17 06:42:25 -0400571static ssize_t show_alarms(struct device *dev, struct device_attribute *attr, char *buf) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700572 struct via686a_data *data = via686a_update_device(dev);
573 return sprintf(buf,"%d\n", ALARMS_FROM_REG(data->alarms));
574}
Jean Delvare1d66c642005-04-18 21:16:59 -0700575static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700576
577/* The driver. I choose to use type i2c_driver, as at is identical to both
578 smbus_driver and isa_driver, and clients could be of either kind */
579static struct i2c_driver via686a_driver = {
580 .owner = THIS_MODULE,
581 .name = "via686a",
582 .id = I2C_DRIVERID_VIA686A,
583 .flags = I2C_DF_NOTIFY,
584 .attach_adapter = via686a_attach_adapter,
585 .detach_client = via686a_detach_client,
586};
587
588
589/* This is called when the module is loaded */
590static int via686a_attach_adapter(struct i2c_adapter *adapter)
591{
592 if (!(adapter->class & I2C_CLASS_HWMON))
593 return 0;
594 return i2c_detect(adapter, &addr_data, via686a_detect);
595}
596
597static int via686a_detect(struct i2c_adapter *adapter, int address, int kind)
598{
599 struct i2c_client *new_client;
600 struct via686a_data *data;
601 int err = 0;
602 const char client_name[] = "via686a";
603 u16 val;
604
605 /* Make sure we are probing the ISA bus!! */
606 if (!i2c_is_isa_adapter(adapter)) {
607 dev_err(&adapter->dev,
608 "via686a_detect called for an I2C bus adapter?!?\n");
609 return 0;
610 }
611
612 /* 8231 requires multiple of 256, we enforce that on 686 as well */
613 if(force_addr)
614 address = force_addr & 0xFF00;
615
616 if(force_addr) {
617 dev_warn(&adapter->dev,"forcing ISA address 0x%04X\n", address);
618 if (PCIBIOS_SUCCESSFUL !=
619 pci_write_config_word(s_bridge, VIA686A_BASE_REG, address))
620 return -ENODEV;
621 }
622 if (PCIBIOS_SUCCESSFUL !=
623 pci_read_config_word(s_bridge, VIA686A_ENABLE_REG, &val))
624 return -ENODEV;
625 if (!(val & 0x0001)) {
626 dev_warn(&adapter->dev,"enabling sensors\n");
627 if (PCIBIOS_SUCCESSFUL !=
628 pci_write_config_word(s_bridge, VIA686A_ENABLE_REG,
629 val | 0x0001))
630 return -ENODEV;
631 }
632
633 /* Reserve the ISA region */
634 if (!request_region(address, VIA686A_EXTENT, via686a_driver.name)) {
635 dev_err(&adapter->dev,"region 0x%x already in use!\n",
636 address);
637 return -ENODEV;
638 }
639
640 if (!(data = kmalloc(sizeof(struct via686a_data), GFP_KERNEL))) {
641 err = -ENOMEM;
642 goto ERROR0;
643 }
644 memset(data, 0, sizeof(struct via686a_data));
645
646 new_client = &data->client;
647 i2c_set_clientdata(new_client, data);
648 new_client->addr = address;
649 new_client->adapter = adapter;
650 new_client->driver = &via686a_driver;
651 new_client->flags = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700652
653 /* Fill in the remaining client fields and put into the global list */
Jean Delvare86b5ac82005-04-18 21:16:58 -0700654 strlcpy(new_client->name, client_name, I2C_NAME_SIZE);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700655
656 data->valid = 0;
657 init_MUTEX(&data->update_lock);
658 /* Tell the I2C layer a new client has arrived */
659 if ((err = i2c_attach_client(new_client)))
660 goto ERROR3;
661
662 /* Initialize the VIA686A chip */
663 via686a_init_client(new_client);
664
665 /* Register sysfs hooks */
666 device_create_file(&new_client->dev, &dev_attr_in0_input);
667 device_create_file(&new_client->dev, &dev_attr_in1_input);
668 device_create_file(&new_client->dev, &dev_attr_in2_input);
669 device_create_file(&new_client->dev, &dev_attr_in3_input);
670 device_create_file(&new_client->dev, &dev_attr_in4_input);
671 device_create_file(&new_client->dev, &dev_attr_in0_min);
672 device_create_file(&new_client->dev, &dev_attr_in1_min);
673 device_create_file(&new_client->dev, &dev_attr_in2_min);
674 device_create_file(&new_client->dev, &dev_attr_in3_min);
675 device_create_file(&new_client->dev, &dev_attr_in4_min);
676 device_create_file(&new_client->dev, &dev_attr_in0_max);
677 device_create_file(&new_client->dev, &dev_attr_in1_max);
678 device_create_file(&new_client->dev, &dev_attr_in2_max);
679 device_create_file(&new_client->dev, &dev_attr_in3_max);
680 device_create_file(&new_client->dev, &dev_attr_in4_max);
681 device_create_file(&new_client->dev, &dev_attr_temp1_input);
682 device_create_file(&new_client->dev, &dev_attr_temp2_input);
683 device_create_file(&new_client->dev, &dev_attr_temp3_input);
684 device_create_file(&new_client->dev, &dev_attr_temp1_max);
685 device_create_file(&new_client->dev, &dev_attr_temp2_max);
686 device_create_file(&new_client->dev, &dev_attr_temp3_max);
687 device_create_file(&new_client->dev, &dev_attr_temp1_max_hyst);
688 device_create_file(&new_client->dev, &dev_attr_temp2_max_hyst);
689 device_create_file(&new_client->dev, &dev_attr_temp3_max_hyst);
690 device_create_file(&new_client->dev, &dev_attr_fan1_input);
691 device_create_file(&new_client->dev, &dev_attr_fan2_input);
692 device_create_file(&new_client->dev, &dev_attr_fan1_min);
693 device_create_file(&new_client->dev, &dev_attr_fan2_min);
694 device_create_file(&new_client->dev, &dev_attr_fan1_div);
695 device_create_file(&new_client->dev, &dev_attr_fan2_div);
696 device_create_file(&new_client->dev, &dev_attr_alarms);
697
698 return 0;
699
700 ERROR3:
701 kfree(data);
702 ERROR0:
703 release_region(address, VIA686A_EXTENT);
704 return err;
705}
706
707static int via686a_detach_client(struct i2c_client *client)
708{
709 int err;
710
711 if ((err = i2c_detach_client(client))) {
712 dev_err(&client->dev,
713 "Client deregistration failed, client not detached.\n");
714 return err;
715 }
716
717 release_region(client->addr, VIA686A_EXTENT);
718 kfree(i2c_get_clientdata(client));
719
720 return 0;
721}
722
723/* Called when we have found a new VIA686A. Set limits, etc. */
724static void via686a_init_client(struct i2c_client *client)
725{
726 u8 reg;
727
728 /* Start monitoring */
729 reg = via686a_read_value(client, VIA686A_REG_CONFIG);
730 via686a_write_value(client, VIA686A_REG_CONFIG, (reg|0x01)&0x7F);
731
732 /* Configure temp interrupt mode for continuous-interrupt operation */
733 via686a_write_value(client, VIA686A_REG_TEMP_MODE,
734 via686a_read_value(client, VIA686A_REG_TEMP_MODE) &
735 !(VIA686A_TEMP_MODE_MASK | VIA686A_TEMP_MODE_CONTINUOUS));
736}
737
738static struct via686a_data *via686a_update_device(struct device *dev)
739{
740 struct i2c_client *client = to_i2c_client(dev);
741 struct via686a_data *data = i2c_get_clientdata(client);
742 int i;
743
744 down(&data->update_lock);
745
746 if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
747 || !data->valid) {
748 for (i = 0; i <= 4; i++) {
749 data->in[i] =
750 via686a_read_value(client, VIA686A_REG_IN(i));
751 data->in_min[i] = via686a_read_value(client,
752 VIA686A_REG_IN_MIN
753 (i));
754 data->in_max[i] =
755 via686a_read_value(client, VIA686A_REG_IN_MAX(i));
756 }
757 for (i = 1; i <= 2; i++) {
758 data->fan[i - 1] =
759 via686a_read_value(client, VIA686A_REG_FAN(i));
760 data->fan_min[i - 1] = via686a_read_value(client,
761 VIA686A_REG_FAN_MIN(i));
762 }
763 for (i = 0; i <= 2; i++) {
764 data->temp[i] = via686a_read_value(client,
765 VIA686A_REG_TEMP(i)) << 2;
766 data->temp_over[i] =
767 via686a_read_value(client,
768 VIA686A_REG_TEMP_OVER(i));
769 data->temp_hyst[i] =
770 via686a_read_value(client,
771 VIA686A_REG_TEMP_HYST(i));
772 }
773 /* add in lower 2 bits
774 temp1 uses bits 7-6 of VIA686A_REG_TEMP_LOW1
775 temp2 uses bits 5-4 of VIA686A_REG_TEMP_LOW23
776 temp3 uses bits 7-6 of VIA686A_REG_TEMP_LOW23
777 */
778 data->temp[0] |= (via686a_read_value(client,
779 VIA686A_REG_TEMP_LOW1)
780 & 0xc0) >> 6;
781 data->temp[1] |=
782 (via686a_read_value(client, VIA686A_REG_TEMP_LOW23) &
783 0x30) >> 4;
784 data->temp[2] |=
785 (via686a_read_value(client, VIA686A_REG_TEMP_LOW23) &
786 0xc0) >> 6;
787
788 i = via686a_read_value(client, VIA686A_REG_FANDIV);
789 data->fan_div[0] = (i >> 4) & 0x03;
790 data->fan_div[1] = i >> 6;
791 data->alarms =
792 via686a_read_value(client,
793 VIA686A_REG_ALARM1) |
794 (via686a_read_value(client, VIA686A_REG_ALARM2) << 8);
795 data->last_updated = jiffies;
796 data->valid = 1;
797 }
798
799 up(&data->update_lock);
800
801 return data;
802}
803
804static struct pci_device_id via686a_pci_ids[] = {
805 { PCI_DEVICE(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C686_4) },
806 { 0, }
807};
808
809MODULE_DEVICE_TABLE(pci, via686a_pci_ids);
810
811static int __devinit via686a_pci_probe(struct pci_dev *dev,
812 const struct pci_device_id *id)
813{
814 u16 val;
815 int addr = 0;
816
817 if (PCIBIOS_SUCCESSFUL !=
818 pci_read_config_word(dev, VIA686A_BASE_REG, &val))
819 return -ENODEV;
820
821 addr = val & ~(VIA686A_EXTENT - 1);
822 if (addr == 0 && force_addr == 0) {
823 dev_err(&dev->dev,"base address not set - upgrade BIOS or use force_addr=0xaddr\n");
824 return -ENODEV;
825 }
826 if (force_addr)
827 addr = force_addr; /* so detect will get called */
828
829 if (!addr) {
830 dev_err(&dev->dev,"No Via 686A sensors found.\n");
831 return -ENODEV;
832 }
833 normal_isa[0] = addr;
834
835 s_bridge = pci_dev_get(dev);
836 if (i2c_add_driver(&via686a_driver)) {
837 pci_dev_put(s_bridge);
838 s_bridge = NULL;
839 }
840
841 /* Always return failure here. This is to allow other drivers to bind
842 * to this pci device. We don't really want to have control over the
843 * pci device, we only wanted to read as few register values from it.
844 */
845 return -ENODEV;
846}
847
848static struct pci_driver via686a_pci_driver = {
849 .name = "via686a",
850 .id_table = via686a_pci_ids,
851 .probe = via686a_pci_probe,
852};
853
854static int __init sm_via686a_init(void)
855{
856 return pci_register_driver(&via686a_pci_driver);
857}
858
859static void __exit sm_via686a_exit(void)
860{
861 pci_unregister_driver(&via686a_pci_driver);
862 if (s_bridge != NULL) {
863 i2c_del_driver(&via686a_driver);
864 pci_dev_put(s_bridge);
865 s_bridge = NULL;
866 }
867}
868
869MODULE_AUTHOR("Kyösti Mälkki <kmalkki@cc.hut.fi>, "
870 "Mark Studebaker <mdsxyz123@yahoo.com> "
871 "and Bob Dougherty <bobd@stanford.edu>");
872MODULE_DESCRIPTION("VIA 686A Sensor device");
873MODULE_LICENSE("GPL");
874
875module_init(sm_via686a_init);
876module_exit(sm_via686a_exit);