1 /* 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 Ky�sti M�lkki <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 33 #include <linux/module.h> 34 #include <linux/slab.h> 35 #include <linux/pci.h> 36 #include <linux/jiffies.h> 37 #include <linux/i2c.h> 38 #include <linux/i2c-isa.h> 39 #include <linux/i2c-sensor.h> 40 #include <linux/hwmon.h> 41 #include <linux/err.h> 42 #include <linux/init.h> 43 #include <asm/io.h> 44 45 46 /* If force_addr is set to anything different from 0, we forcibly enable 47 the device at the given address. */ 48 static unsigned short force_addr = 0; 49 module_param(force_addr, ushort, 0); 50 MODULE_PARM_DESC(force_addr, 51 "Initialize the base address of the sensors"); 52 53 /* Device address 54 Note that we can't determine the ISA address until we have initialized 55 our module */ 56 static unsigned short address; 57 58 /* 59 The Via 686a southbridge has a LM78-like chip integrated on the same IC. 60 This driver is a customized copy of lm78.c 61 */ 62 63 /* Many VIA686A constants specified below */ 64 65 /* Length of ISA address segment */ 66 #define VIA686A_EXTENT 0x80 67 #define VIA686A_BASE_REG 0x70 68 #define VIA686A_ENABLE_REG 0x74 69 70 /* The VIA686A registers */ 71 /* ins numbered 0-4 */ 72 #define VIA686A_REG_IN_MAX(nr) (0x2b + ((nr) * 2)) 73 #define VIA686A_REG_IN_MIN(nr) (0x2c + ((nr) * 2)) 74 #define VIA686A_REG_IN(nr) (0x22 + (nr)) 75 76 /* fans numbered 1-2 */ 77 #define VIA686A_REG_FAN_MIN(nr) (0x3a + (nr)) 78 #define VIA686A_REG_FAN(nr) (0x28 + (nr)) 79 80 /* temps numbered 1-3 */ 81 static const u8 VIA686A_REG_TEMP[] = { 0x20, 0x21, 0x1f }; 82 static const u8 VIA686A_REG_TEMP_OVER[] = { 0x39, 0x3d, 0x1d }; 83 static const u8 VIA686A_REG_TEMP_HYST[] = { 0x3a, 0x3e, 0x1e }; 84 /* bits 7-6 */ 85 #define VIA686A_REG_TEMP_LOW1 0x4b 86 /* 2 = bits 5-4, 3 = bits 7-6 */ 87 #define VIA686A_REG_TEMP_LOW23 0x49 88 89 #define VIA686A_REG_ALARM1 0x41 90 #define VIA686A_REG_ALARM2 0x42 91 #define VIA686A_REG_FANDIV 0x47 92 #define VIA686A_REG_CONFIG 0x40 93 /* The following register sets temp interrupt mode (bits 1-0 for temp1, 94 3-2 for temp2, 5-4 for temp3). Modes are: 95 00 interrupt stays as long as value is out-of-range 96 01 interrupt is cleared once register is read (default) 97 10 comparator mode- like 00, but ignores hysteresis 98 11 same as 00 */ 99 #define VIA686A_REG_TEMP_MODE 0x4b 100 /* We'll just assume that you want to set all 3 simultaneously: */ 101 #define VIA686A_TEMP_MODE_MASK 0x3F 102 #define VIA686A_TEMP_MODE_CONTINUOUS 0x00 103 104 /* Conversions. Limit checking is only done on the TO_REG 105 variants. 106 107 ********* VOLTAGE CONVERSIONS (Bob Dougherty) ******** 108 From HWMon.cpp (Copyright 1998-2000 Jonathan Teh Soon Yew): 109 voltagefactor[0]=1.25/2628; (2628/1.25=2102.4) // Vccp 110 voltagefactor[1]=1.25/2628; (2628/1.25=2102.4) // +2.5V 111 voltagefactor[2]=1.67/2628; (2628/1.67=1573.7) // +3.3V 112 voltagefactor[3]=2.6/2628; (2628/2.60=1010.8) // +5V 113 voltagefactor[4]=6.3/2628; (2628/6.30=417.14) // +12V 114 in[i]=(data[i+2]*25.0+133)*voltagefactor[i]; 115 That is: 116 volts = (25*regVal+133)*factor 117 regVal = (volts/factor-133)/25 118 (These conversions were contributed by Jonathan Teh Soon Yew 119 <j.teh@iname.com>) */ 120 static inline u8 IN_TO_REG(long val, int inNum) 121 { 122 /* To avoid floating point, we multiply constants by 10 (100 for +12V). 123 Rounding is done (120500 is actually 133000 - 12500). 124 Remember that val is expressed in 0.001V/bit, which is why we divide 125 by an additional 10000 (100000 for +12V): 1000 for val and 10 (100) 126 for the constants. */ 127 if (inNum <= 1) 128 return (u8) 129 SENSORS_LIMIT((val * 21024 - 1205000) / 250000, 0, 255); 130 else if (inNum == 2) 131 return (u8) 132 SENSORS_LIMIT((val * 15737 - 1205000) / 250000, 0, 255); 133 else if (inNum == 3) 134 return (u8) 135 SENSORS_LIMIT((val * 10108 - 1205000) / 250000, 0, 255); 136 else 137 return (u8) 138 SENSORS_LIMIT((val * 41714 - 12050000) / 2500000, 0, 255); 139 } 140 141 static inline long IN_FROM_REG(u8 val, int inNum) 142 { 143 /* To avoid floating point, we multiply constants by 10 (100 for +12V). 144 We also multiply them by 1000 because we want 0.001V/bit for the 145 output value. Rounding is done. */ 146 if (inNum <= 1) 147 return (long) ((250000 * val + 1330000 + 21024 / 2) / 21024); 148 else if (inNum == 2) 149 return (long) ((250000 * val + 1330000 + 15737 / 2) / 15737); 150 else if (inNum == 3) 151 return (long) ((250000 * val + 1330000 + 10108 / 2) / 10108); 152 else 153 return (long) ((2500000 * val + 13300000 + 41714 / 2) / 41714); 154 } 155 156 /********* FAN RPM CONVERSIONS ********/ 157 /* Higher register values = slower fans (the fan's strobe gates a counter). 158 But this chip saturates back at 0, not at 255 like all the other chips. 159 So, 0 means 0 RPM */ 160 static inline u8 FAN_TO_REG(long rpm, int div) 161 { 162 if (rpm == 0) 163 return 0; 164 rpm = SENSORS_LIMIT(rpm, 1, 1000000); 165 return SENSORS_LIMIT((1350000 + rpm * div / 2) / (rpm * div), 1, 255); 166 } 167 168 #define FAN_FROM_REG(val,div) ((val)==0?0:(val)==255?0:1350000/((val)*(div))) 169 170 /******** TEMP CONVERSIONS (Bob Dougherty) *********/ 171 /* linear fits from HWMon.cpp (Copyright 1998-2000 Jonathan Teh Soon Yew) 172 if(temp<169) 173 return double(temp)*0.427-32.08; 174 else if(temp>=169 && temp<=202) 175 return double(temp)*0.582-58.16; 176 else 177 return double(temp)*0.924-127.33; 178 179 A fifth-order polynomial fits the unofficial data (provided by Alex van 180 Kaam <darkside@chello.nl>) a bit better. It also give more reasonable 181 numbers on my machine (ie. they agree with what my BIOS tells me). 182 Here's the fifth-order fit to the 8-bit data: 183 temp = 1.625093e-10*val^5 - 1.001632e-07*val^4 + 2.457653e-05*val^3 - 184 2.967619e-03*val^2 + 2.175144e-01*val - 7.090067e+0. 185 186 (2000-10-25- RFD: thanks to Uwe Andersen <uandersen@mayah.com> for 187 finding my typos in this formula!) 188 189 Alas, none of the elegant function-fit solutions will work because we 190 aren't allowed to use floating point in the kernel and doing it with 191 integers doesn't provide enough precision. So we'll do boring old 192 look-up table stuff. The unofficial data (see below) have effectively 193 7-bit resolution (they are rounded to the nearest degree). I'm assuming 194 that the transfer function of the device is monotonic and smooth, so a 195 smooth function fit to the data will allow us to get better precision. 196 I used the 5th-order poly fit described above and solved for 197 VIA register values 0-255. I *10 before rounding, so we get tenth-degree 198 precision. (I could have done all 1024 values for our 10-bit readings, 199 but the function is very linear in the useful range (0-80 deg C), so 200 we'll just use linear interpolation for 10-bit readings.) So, tempLUT 201 is the temp at via register values 0-255: */ 202 static const long tempLUT[] = 203 { -709, -688, -667, -646, -627, -607, -589, -570, -553, -536, -519, 204 -503, -487, -471, -456, -442, -428, -414, -400, -387, -375, 205 -362, -350, -339, -327, -316, -305, -295, -285, -275, -265, 206 -255, -246, -237, -229, -220, -212, -204, -196, -188, -180, 207 -173, -166, -159, -152, -145, -139, -132, -126, -120, -114, 208 -108, -102, -96, -91, -85, -80, -74, -69, -64, -59, -54, -49, 209 -44, -39, -34, -29, -25, -20, -15, -11, -6, -2, 3, 7, 12, 16, 210 20, 25, 29, 33, 37, 42, 46, 50, 54, 59, 63, 67, 71, 75, 79, 84, 211 88, 92, 96, 100, 104, 109, 113, 117, 121, 125, 130, 134, 138, 212 142, 146, 151, 155, 159, 163, 168, 172, 176, 181, 185, 189, 213 193, 198, 202, 206, 211, 215, 219, 224, 228, 232, 237, 241, 214 245, 250, 254, 259, 263, 267, 272, 276, 281, 285, 290, 294, 215 299, 303, 307, 312, 316, 321, 325, 330, 334, 339, 344, 348, 216 353, 357, 362, 366, 371, 376, 380, 385, 390, 395, 399, 404, 217 409, 414, 419, 423, 428, 433, 438, 443, 449, 454, 459, 464, 218 469, 475, 480, 486, 491, 497, 502, 508, 514, 520, 526, 532, 219 538, 544, 551, 557, 564, 571, 578, 584, 592, 599, 606, 614, 220 621, 629, 637, 645, 654, 662, 671, 680, 689, 698, 708, 718, 221 728, 738, 749, 759, 770, 782, 793, 805, 818, 830, 843, 856, 222 870, 883, 898, 912, 927, 943, 958, 975, 991, 1008, 1026, 1044, 223 1062, 1081, 1101, 1121, 1141, 1162, 1184, 1206, 1229, 1252, 224 1276, 1301, 1326, 1352, 1378, 1406, 1434, 1462 225 }; 226 227 /* the original LUT values from Alex van Kaam <darkside@chello.nl> 228 (for via register values 12-240): 229 {-50,-49,-47,-45,-43,-41,-39,-38,-37,-35,-34,-33,-32,-31, 230 -30,-29,-28,-27,-26,-25,-24,-24,-23,-22,-21,-20,-20,-19,-18,-17,-17,-16,-15, 231 -15,-14,-14,-13,-12,-12,-11,-11,-10,-9,-9,-8,-8,-7,-7,-6,-6,-5,-5,-4,-4,-3, 232 -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, 233 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, 234 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, 235 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, 236 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, 237 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, 238 85,86,88,89,91,92,94,96,97,99,101,103,105,107,109,110}; 239 240 241 Here's the reverse LUT. I got it by doing a 6-th order poly fit (needed 242 an extra term for a good fit to these inverse data!) and then 243 solving for each temp value from -50 to 110 (the useable range for 244 this chip). Here's the fit: 245 viaRegVal = -1.160370e-10*val^6 +3.193693e-08*val^5 - 1.464447e-06*val^4 246 - 2.525453e-04*val^3 + 1.424593e-02*val^2 + 2.148941e+00*val +7.275808e+01) 247 Note that n=161: */ 248 static const u8 viaLUT[] = 249 { 12, 12, 13, 14, 14, 15, 16, 16, 17, 18, 18, 19, 20, 20, 21, 22, 23, 250 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 35, 36, 37, 39, 40, 251 41, 43, 45, 46, 48, 49, 51, 53, 55, 57, 59, 60, 62, 64, 66, 252 69, 71, 73, 75, 77, 79, 82, 84, 86, 88, 91, 93, 95, 98, 100, 253 103, 105, 107, 110, 112, 115, 117, 119, 122, 124, 126, 129, 254 131, 134, 136, 138, 140, 143, 145, 147, 150, 152, 154, 156, 255 158, 160, 162, 164, 166, 168, 170, 172, 174, 176, 178, 180, 256 182, 183, 185, 187, 188, 190, 192, 193, 195, 196, 198, 199, 257 200, 202, 203, 205, 206, 207, 208, 209, 210, 211, 212, 213, 258 214, 215, 216, 217, 218, 219, 220, 221, 222, 222, 223, 224, 259 225, 226, 226, 227, 228, 228, 229, 230, 230, 231, 232, 232, 260 233, 233, 234, 235, 235, 236, 236, 237, 237, 238, 238, 239, 261 239, 240 262 }; 263 264 /* Converting temps to (8-bit) hyst and over registers 265 No interpolation here. 266 The +50 is because the temps start at -50 */ 267 static inline u8 TEMP_TO_REG(long val) 268 { 269 return viaLUT[val <= -50000 ? 0 : val >= 110000 ? 160 : 270 (val < 0 ? val - 500 : val + 500) / 1000 + 50]; 271 } 272 273 /* for 8-bit temperature hyst and over registers */ 274 #define TEMP_FROM_REG(val) (tempLUT[(val)] * 100) 275 276 /* for 10-bit temperature readings */ 277 static inline long TEMP_FROM_REG10(u16 val) 278 { 279 u16 eightBits = val >> 2; 280 u16 twoBits = val & 3; 281 282 /* no interpolation for these */ 283 if (twoBits == 0 || eightBits == 255) 284 return TEMP_FROM_REG(eightBits); 285 286 /* do some linear interpolation */ 287 return (tempLUT[eightBits] * (4 - twoBits) + 288 tempLUT[eightBits + 1] * twoBits) * 25; 289 } 290 291 #define DIV_FROM_REG(val) (1 << (val)) 292 #define DIV_TO_REG(val) ((val)==8?3:(val)==4?2:(val)==1?0:1) 293 294 /* For the VIA686A, we need to keep some data in memory. 295 The structure is dynamically allocated, at the same time when a new 296 via686a client is allocated. */ 297 struct via686a_data { 298 struct i2c_client client; 299 struct class_device *class_dev; 300 struct semaphore update_lock; 301 char valid; /* !=0 if following fields are valid */ 302 unsigned long last_updated; /* In jiffies */ 303 304 u8 in[5]; /* Register value */ 305 u8 in_max[5]; /* Register value */ 306 u8 in_min[5]; /* Register value */ 307 u8 fan[2]; /* Register value */ 308 u8 fan_min[2]; /* Register value */ 309 u16 temp[3]; /* Register value 10 bit */ 310 u8 temp_over[3]; /* Register value */ 311 u8 temp_hyst[3]; /* Register value */ 312 u8 fan_div[2]; /* Register encoding, shifted right */ 313 u16 alarms; /* Register encoding, combined */ 314 }; 315 316 static struct pci_dev *s_bridge; /* pointer to the (only) via686a */ 317 318 static int via686a_detect(struct i2c_adapter *adapter); 319 static int via686a_detach_client(struct i2c_client *client); 320 321 static inline int via686a_read_value(struct i2c_client *client, u8 reg) 322 { 323 return (inb_p(client->addr + reg)); 324 } 325 326 static inline void via686a_write_value(struct i2c_client *client, u8 reg, 327 u8 value) 328 { 329 outb_p(value, client->addr + reg); 330 } 331 332 static struct via686a_data *via686a_update_device(struct device *dev); 333 static void via686a_init_client(struct i2c_client *client); 334 335 /* following are the sysfs callback functions */ 336 337 /* 7 voltage sensors */ 338 static ssize_t show_in(struct device *dev, char *buf, int nr) { 339 struct via686a_data *data = via686a_update_device(dev); 340 return sprintf(buf, "%ld\n", IN_FROM_REG(data->in[nr], nr)); 341 } 342 343 static ssize_t show_in_min(struct device *dev, char *buf, int nr) { 344 struct via686a_data *data = via686a_update_device(dev); 345 return sprintf(buf, "%ld\n", IN_FROM_REG(data->in_min[nr], nr)); 346 } 347 348 static ssize_t show_in_max(struct device *dev, char *buf, int nr) { 349 struct via686a_data *data = via686a_update_device(dev); 350 return sprintf(buf, "%ld\n", IN_FROM_REG(data->in_max[nr], nr)); 351 } 352 353 static ssize_t set_in_min(struct device *dev, const char *buf, 354 size_t count, int nr) { 355 struct i2c_client *client = to_i2c_client(dev); 356 struct via686a_data *data = i2c_get_clientdata(client); 357 unsigned long val = simple_strtoul(buf, NULL, 10); 358 359 down(&data->update_lock); 360 data->in_min[nr] = IN_TO_REG(val, nr); 361 via686a_write_value(client, VIA686A_REG_IN_MIN(nr), 362 data->in_min[nr]); 363 up(&data->update_lock); 364 return count; 365 } 366 static ssize_t set_in_max(struct device *dev, const char *buf, 367 size_t count, int nr) { 368 struct i2c_client *client = to_i2c_client(dev); 369 struct via686a_data *data = i2c_get_clientdata(client); 370 unsigned long val = simple_strtoul(buf, NULL, 10); 371 372 down(&data->update_lock); 373 data->in_max[nr] = IN_TO_REG(val, nr); 374 via686a_write_value(client, VIA686A_REG_IN_MAX(nr), 375 data->in_max[nr]); 376 up(&data->update_lock); 377 return count; 378 } 379 #define show_in_offset(offset) \ 380 static ssize_t \ 381 show_in##offset (struct device *dev, struct device_attribute *attr, char *buf) \ 382 { \ 383 return show_in(dev, buf, offset); \ 384 } \ 385 static ssize_t \ 386 show_in##offset##_min (struct device *dev, struct device_attribute *attr, char *buf) \ 387 { \ 388 return show_in_min(dev, buf, offset); \ 389 } \ 390 static ssize_t \ 391 show_in##offset##_max (struct device *dev, struct device_attribute *attr, char *buf) \ 392 { \ 393 return show_in_max(dev, buf, offset); \ 394 } \ 395 static ssize_t set_in##offset##_min (struct device *dev, struct device_attribute *attr, \ 396 const char *buf, size_t count) \ 397 { \ 398 return set_in_min(dev, buf, count, offset); \ 399 } \ 400 static ssize_t set_in##offset##_max (struct device *dev, struct device_attribute *attr, \ 401 const char *buf, size_t count) \ 402 { \ 403 return set_in_max(dev, buf, count, offset); \ 404 } \ 405 static DEVICE_ATTR(in##offset##_input, S_IRUGO, show_in##offset, NULL);\ 406 static DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \ 407 show_in##offset##_min, set_in##offset##_min); \ 408 static DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \ 409 show_in##offset##_max, set_in##offset##_max); 410 411 show_in_offset(0); 412 show_in_offset(1); 413 show_in_offset(2); 414 show_in_offset(3); 415 show_in_offset(4); 416 417 /* 3 temperatures */ 418 static ssize_t show_temp(struct device *dev, char *buf, int nr) { 419 struct via686a_data *data = via686a_update_device(dev); 420 return sprintf(buf, "%ld\n", TEMP_FROM_REG10(data->temp[nr])); 421 } 422 static ssize_t show_temp_over(struct device *dev, char *buf, int nr) { 423 struct via686a_data *data = via686a_update_device(dev); 424 return sprintf(buf, "%ld\n", TEMP_FROM_REG(data->temp_over[nr])); 425 } 426 static ssize_t show_temp_hyst(struct device *dev, char *buf, int nr) { 427 struct via686a_data *data = via686a_update_device(dev); 428 return sprintf(buf, "%ld\n", TEMP_FROM_REG(data->temp_hyst[nr])); 429 } 430 static ssize_t set_temp_over(struct device *dev, const char *buf, 431 size_t count, int nr) { 432 struct i2c_client *client = to_i2c_client(dev); 433 struct via686a_data *data = i2c_get_clientdata(client); 434 int val = simple_strtol(buf, NULL, 10); 435 436 down(&data->update_lock); 437 data->temp_over[nr] = TEMP_TO_REG(val); 438 via686a_write_value(client, VIA686A_REG_TEMP_OVER[nr], 439 data->temp_over[nr]); 440 up(&data->update_lock); 441 return count; 442 } 443 static ssize_t set_temp_hyst(struct device *dev, const char *buf, 444 size_t count, int nr) { 445 struct i2c_client *client = to_i2c_client(dev); 446 struct via686a_data *data = i2c_get_clientdata(client); 447 int val = simple_strtol(buf, NULL, 10); 448 449 down(&data->update_lock); 450 data->temp_hyst[nr] = TEMP_TO_REG(val); 451 via686a_write_value(client, VIA686A_REG_TEMP_HYST[nr], 452 data->temp_hyst[nr]); 453 up(&data->update_lock); 454 return count; 455 } 456 #define show_temp_offset(offset) \ 457 static ssize_t show_temp_##offset (struct device *dev, struct device_attribute *attr, char *buf) \ 458 { \ 459 return show_temp(dev, buf, offset - 1); \ 460 } \ 461 static ssize_t \ 462 show_temp_##offset##_over (struct device *dev, struct device_attribute *attr, char *buf) \ 463 { \ 464 return show_temp_over(dev, buf, offset - 1); \ 465 } \ 466 static ssize_t \ 467 show_temp_##offset##_hyst (struct device *dev, struct device_attribute *attr, char *buf) \ 468 { \ 469 return show_temp_hyst(dev, buf, offset - 1); \ 470 } \ 471 static ssize_t set_temp_##offset##_over (struct device *dev, struct device_attribute *attr, \ 472 const char *buf, size_t count) \ 473 { \ 474 return set_temp_over(dev, buf, count, offset - 1); \ 475 } \ 476 static ssize_t set_temp_##offset##_hyst (struct device *dev, struct device_attribute *attr, \ 477 const char *buf, size_t count) \ 478 { \ 479 return set_temp_hyst(dev, buf, count, offset - 1); \ 480 } \ 481 static DEVICE_ATTR(temp##offset##_input, S_IRUGO, show_temp_##offset, NULL);\ 482 static DEVICE_ATTR(temp##offset##_max, S_IRUGO | S_IWUSR, \ 483 show_temp_##offset##_over, set_temp_##offset##_over); \ 484 static DEVICE_ATTR(temp##offset##_max_hyst, S_IRUGO | S_IWUSR, \ 485 show_temp_##offset##_hyst, set_temp_##offset##_hyst); 486 487 show_temp_offset(1); 488 show_temp_offset(2); 489 show_temp_offset(3); 490 491 /* 2 Fans */ 492 static ssize_t show_fan(struct device *dev, char *buf, int nr) { 493 struct via686a_data *data = via686a_update_device(dev); 494 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[nr], 495 DIV_FROM_REG(data->fan_div[nr])) ); 496 } 497 static ssize_t show_fan_min(struct device *dev, char *buf, int nr) { 498 struct via686a_data *data = via686a_update_device(dev); 499 return sprintf(buf, "%d\n", 500 FAN_FROM_REG(data->fan_min[nr], DIV_FROM_REG(data->fan_div[nr])) ); 501 } 502 static ssize_t show_fan_div(struct device *dev, char *buf, int nr) { 503 struct via686a_data *data = via686a_update_device(dev); 504 return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr]) ); 505 } 506 static ssize_t set_fan_min(struct device *dev, const char *buf, 507 size_t count, int nr) { 508 struct i2c_client *client = to_i2c_client(dev); 509 struct via686a_data *data = i2c_get_clientdata(client); 510 int val = simple_strtol(buf, NULL, 10); 511 512 down(&data->update_lock); 513 data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr])); 514 via686a_write_value(client, VIA686A_REG_FAN_MIN(nr+1), data->fan_min[nr]); 515 up(&data->update_lock); 516 return count; 517 } 518 static ssize_t set_fan_div(struct device *dev, const char *buf, 519 size_t count, int nr) { 520 struct i2c_client *client = to_i2c_client(dev); 521 struct via686a_data *data = i2c_get_clientdata(client); 522 int val = simple_strtol(buf, NULL, 10); 523 int old; 524 525 down(&data->update_lock); 526 old = via686a_read_value(client, VIA686A_REG_FANDIV); 527 data->fan_div[nr] = DIV_TO_REG(val); 528 old = (old & 0x0f) | (data->fan_div[1] << 6) | (data->fan_div[0] << 4); 529 via686a_write_value(client, VIA686A_REG_FANDIV, old); 530 up(&data->update_lock); 531 return count; 532 } 533 534 #define show_fan_offset(offset) \ 535 static ssize_t show_fan_##offset (struct device *dev, struct device_attribute *attr, char *buf) \ 536 { \ 537 return show_fan(dev, buf, offset - 1); \ 538 } \ 539 static ssize_t show_fan_##offset##_min (struct device *dev, struct device_attribute *attr, char *buf) \ 540 { \ 541 return show_fan_min(dev, buf, offset - 1); \ 542 } \ 543 static ssize_t show_fan_##offset##_div (struct device *dev, struct device_attribute *attr, char *buf) \ 544 { \ 545 return show_fan_div(dev, buf, offset - 1); \ 546 } \ 547 static ssize_t set_fan_##offset##_min (struct device *dev, struct device_attribute *attr, \ 548 const char *buf, size_t count) \ 549 { \ 550 return set_fan_min(dev, buf, count, offset - 1); \ 551 } \ 552 static ssize_t set_fan_##offset##_div (struct device *dev, struct device_attribute *attr, \ 553 const char *buf, size_t count) \ 554 { \ 555 return set_fan_div(dev, buf, count, offset - 1); \ 556 } \ 557 static DEVICE_ATTR(fan##offset##_input, S_IRUGO, show_fan_##offset, NULL);\ 558 static DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \ 559 show_fan_##offset##_min, set_fan_##offset##_min); \ 560 static DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR, \ 561 show_fan_##offset##_div, set_fan_##offset##_div); 562 563 show_fan_offset(1); 564 show_fan_offset(2); 565 566 /* Alarms */ 567 static ssize_t show_alarms(struct device *dev, struct device_attribute *attr, char *buf) { 568 struct via686a_data *data = via686a_update_device(dev); 569 return sprintf(buf, "%u\n", data->alarms); 570 } 571 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL); 572 573 /* The driver. I choose to use type i2c_driver, as at is identical to both 574 smbus_driver and isa_driver, and clients could be of either kind */ 575 static struct i2c_driver via686a_driver = { 576 .owner = THIS_MODULE, 577 .name = "via686a", 578 .attach_adapter = via686a_detect, 579 .detach_client = via686a_detach_client, 580 }; 581 582 583 /* This is called when the module is loaded */ 584 static int via686a_detect(struct i2c_adapter *adapter) 585 { 586 struct i2c_client *new_client; 587 struct via686a_data *data; 588 int err = 0; 589 const char client_name[] = "via686a"; 590 u16 val; 591 592 /* 8231 requires multiple of 256, we enforce that on 686 as well */ 593 if (force_addr) 594 address = force_addr & 0xFF00; 595 596 if (force_addr) { 597 dev_warn(&adapter->dev, "forcing ISA address 0x%04X\n", 598 address); 599 if (PCIBIOS_SUCCESSFUL != 600 pci_write_config_word(s_bridge, VIA686A_BASE_REG, address)) 601 return -ENODEV; 602 } 603 if (PCIBIOS_SUCCESSFUL != 604 pci_read_config_word(s_bridge, VIA686A_ENABLE_REG, &val)) 605 return -ENODEV; 606 if (!(val & 0x0001)) { 607 dev_warn(&adapter->dev, "enabling sensors\n"); 608 if (PCIBIOS_SUCCESSFUL != 609 pci_write_config_word(s_bridge, VIA686A_ENABLE_REG, 610 val | 0x0001)) 611 return -ENODEV; 612 } 613 614 /* Reserve the ISA region */ 615 if (!request_region(address, VIA686A_EXTENT, via686a_driver.name)) { 616 dev_err(&adapter->dev, "region 0x%x already in use!\n", 617 address); 618 return -ENODEV; 619 } 620 621 if (!(data = kmalloc(sizeof(struct via686a_data), GFP_KERNEL))) { 622 err = -ENOMEM; 623 goto exit_release; 624 } 625 memset(data, 0, sizeof(struct via686a_data)); 626 627 new_client = &data->client; 628 i2c_set_clientdata(new_client, data); 629 new_client->addr = address; 630 new_client->adapter = adapter; 631 new_client->driver = &via686a_driver; 632 new_client->flags = 0; 633 634 /* Fill in the remaining client fields and put into the global list */ 635 strlcpy(new_client->name, client_name, I2C_NAME_SIZE); 636 637 data->valid = 0; 638 init_MUTEX(&data->update_lock); 639 /* Tell the I2C layer a new client has arrived */ 640 if ((err = i2c_attach_client(new_client))) 641 goto exit_free; 642 643 /* Initialize the VIA686A chip */ 644 via686a_init_client(new_client); 645 646 /* Register sysfs hooks */ 647 data->class_dev = hwmon_device_register(&new_client->dev); 648 if (IS_ERR(data->class_dev)) { 649 err = PTR_ERR(data->class_dev); 650 goto exit_detach; 651 } 652 653 device_create_file(&new_client->dev, &dev_attr_in0_input); 654 device_create_file(&new_client->dev, &dev_attr_in1_input); 655 device_create_file(&new_client->dev, &dev_attr_in2_input); 656 device_create_file(&new_client->dev, &dev_attr_in3_input); 657 device_create_file(&new_client->dev, &dev_attr_in4_input); 658 device_create_file(&new_client->dev, &dev_attr_in0_min); 659 device_create_file(&new_client->dev, &dev_attr_in1_min); 660 device_create_file(&new_client->dev, &dev_attr_in2_min); 661 device_create_file(&new_client->dev, &dev_attr_in3_min); 662 device_create_file(&new_client->dev, &dev_attr_in4_min); 663 device_create_file(&new_client->dev, &dev_attr_in0_max); 664 device_create_file(&new_client->dev, &dev_attr_in1_max); 665 device_create_file(&new_client->dev, &dev_attr_in2_max); 666 device_create_file(&new_client->dev, &dev_attr_in3_max); 667 device_create_file(&new_client->dev, &dev_attr_in4_max); 668 device_create_file(&new_client->dev, &dev_attr_temp1_input); 669 device_create_file(&new_client->dev, &dev_attr_temp2_input); 670 device_create_file(&new_client->dev, &dev_attr_temp3_input); 671 device_create_file(&new_client->dev, &dev_attr_temp1_max); 672 device_create_file(&new_client->dev, &dev_attr_temp2_max); 673 device_create_file(&new_client->dev, &dev_attr_temp3_max); 674 device_create_file(&new_client->dev, &dev_attr_temp1_max_hyst); 675 device_create_file(&new_client->dev, &dev_attr_temp2_max_hyst); 676 device_create_file(&new_client->dev, &dev_attr_temp3_max_hyst); 677 device_create_file(&new_client->dev, &dev_attr_fan1_input); 678 device_create_file(&new_client->dev, &dev_attr_fan2_input); 679 device_create_file(&new_client->dev, &dev_attr_fan1_min); 680 device_create_file(&new_client->dev, &dev_attr_fan2_min); 681 device_create_file(&new_client->dev, &dev_attr_fan1_div); 682 device_create_file(&new_client->dev, &dev_attr_fan2_div); 683 device_create_file(&new_client->dev, &dev_attr_alarms); 684 685 return 0; 686 687 exit_detach: 688 i2c_detach_client(new_client); 689 exit_free: 690 kfree(data); 691 exit_release: 692 release_region(address, VIA686A_EXTENT); 693 return err; 694 } 695 696 static int via686a_detach_client(struct i2c_client *client) 697 { 698 struct via686a_data *data = i2c_get_clientdata(client); 699 int err; 700 701 hwmon_device_unregister(data->class_dev); 702 703 if ((err = i2c_detach_client(client))) { 704 dev_err(&client->dev, 705 "Client deregistration failed, client not detached.\n"); 706 return err; 707 } 708 709 release_region(client->addr, VIA686A_EXTENT); 710 kfree(data); 711 712 return 0; 713 } 714 715 /* Called when we have found a new VIA686A. Set limits, etc. */ 716 static void via686a_init_client(struct i2c_client *client) 717 { 718 u8 reg; 719 720 /* Start monitoring */ 721 reg = via686a_read_value(client, VIA686A_REG_CONFIG); 722 via686a_write_value(client, VIA686A_REG_CONFIG, (reg|0x01)&0x7F); 723 724 /* Configure temp interrupt mode for continuous-interrupt operation */ 725 via686a_write_value(client, VIA686A_REG_TEMP_MODE, 726 via686a_read_value(client, VIA686A_REG_TEMP_MODE) & 727 !(VIA686A_TEMP_MODE_MASK | VIA686A_TEMP_MODE_CONTINUOUS)); 728 } 729 730 static struct via686a_data *via686a_update_device(struct device *dev) 731 { 732 struct i2c_client *client = to_i2c_client(dev); 733 struct via686a_data *data = i2c_get_clientdata(client); 734 int i; 735 736 down(&data->update_lock); 737 738 if (time_after(jiffies, data->last_updated + HZ + HZ / 2) 739 || !data->valid) { 740 for (i = 0; i <= 4; i++) { 741 data->in[i] = 742 via686a_read_value(client, VIA686A_REG_IN(i)); 743 data->in_min[i] = via686a_read_value(client, 744 VIA686A_REG_IN_MIN 745 (i)); 746 data->in_max[i] = 747 via686a_read_value(client, VIA686A_REG_IN_MAX(i)); 748 } 749 for (i = 1; i <= 2; i++) { 750 data->fan[i - 1] = 751 via686a_read_value(client, VIA686A_REG_FAN(i)); 752 data->fan_min[i - 1] = via686a_read_value(client, 753 VIA686A_REG_FAN_MIN(i)); 754 } 755 for (i = 0; i <= 2; i++) { 756 data->temp[i] = via686a_read_value(client, 757 VIA686A_REG_TEMP[i]) << 2; 758 data->temp_over[i] = 759 via686a_read_value(client, 760 VIA686A_REG_TEMP_OVER[i]); 761 data->temp_hyst[i] = 762 via686a_read_value(client, 763 VIA686A_REG_TEMP_HYST[i]); 764 } 765 /* add in lower 2 bits 766 temp1 uses bits 7-6 of VIA686A_REG_TEMP_LOW1 767 temp2 uses bits 5-4 of VIA686A_REG_TEMP_LOW23 768 temp3 uses bits 7-6 of VIA686A_REG_TEMP_LOW23 769 */ 770 data->temp[0] |= (via686a_read_value(client, 771 VIA686A_REG_TEMP_LOW1) 772 & 0xc0) >> 6; 773 data->temp[1] |= 774 (via686a_read_value(client, VIA686A_REG_TEMP_LOW23) & 775 0x30) >> 4; 776 data->temp[2] |= 777 (via686a_read_value(client, VIA686A_REG_TEMP_LOW23) & 778 0xc0) >> 6; 779 780 i = via686a_read_value(client, VIA686A_REG_FANDIV); 781 data->fan_div[0] = (i >> 4) & 0x03; 782 data->fan_div[1] = i >> 6; 783 data->alarms = 784 via686a_read_value(client, 785 VIA686A_REG_ALARM1) | 786 (via686a_read_value(client, VIA686A_REG_ALARM2) << 8); 787 data->last_updated = jiffies; 788 data->valid = 1; 789 } 790 791 up(&data->update_lock); 792 793 return data; 794 } 795 796 static struct pci_device_id via686a_pci_ids[] = { 797 { PCI_DEVICE(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C686_4) }, 798 { 0, } 799 }; 800 801 MODULE_DEVICE_TABLE(pci, via686a_pci_ids); 802 803 static int __devinit via686a_pci_probe(struct pci_dev *dev, 804 const struct pci_device_id *id) 805 { 806 u16 val; 807 808 if (PCIBIOS_SUCCESSFUL != 809 pci_read_config_word(dev, VIA686A_BASE_REG, &val)) 810 return -ENODEV; 811 812 address = val & ~(VIA686A_EXTENT - 1); 813 if (address == 0 && force_addr == 0) { 814 dev_err(&dev->dev, "base address not set - upgrade BIOS " 815 "or use force_addr=0xaddr\n"); 816 return -ENODEV; 817 } 818 819 if (!address) { 820 dev_err(&dev->dev, "No Via 686A sensors found.\n"); 821 return -ENODEV; 822 } 823 824 s_bridge = pci_dev_get(dev); 825 if (i2c_isa_add_driver(&via686a_driver)) { 826 pci_dev_put(s_bridge); 827 s_bridge = NULL; 828 } 829 830 /* Always return failure here. This is to allow other drivers to bind 831 * to this pci device. We don't really want to have control over the 832 * pci device, we only wanted to read as few register values from it. 833 */ 834 return -ENODEV; 835 } 836 837 static struct pci_driver via686a_pci_driver = { 838 .name = "via686a", 839 .id_table = via686a_pci_ids, 840 .probe = via686a_pci_probe, 841 }; 842 843 static int __init sm_via686a_init(void) 844 { 845 return pci_register_driver(&via686a_pci_driver); 846 } 847 848 static void __exit sm_via686a_exit(void) 849 { 850 pci_unregister_driver(&via686a_pci_driver); 851 if (s_bridge != NULL) { 852 i2c_isa_del_driver(&via686a_driver); 853 pci_dev_put(s_bridge); 854 s_bridge = NULL; 855 } 856 } 857 858 MODULE_AUTHOR("Ky�sti M�lkki <kmalkki@cc.hut.fi>, " 859 "Mark Studebaker <mdsxyz123@yahoo.com> " 860 "and Bob Dougherty <bobd@stanford.edu>"); 861 MODULE_DESCRIPTION("VIA 686A Sensor device"); 862 MODULE_LICENSE("GPL"); 863 864 module_init(sm_via686a_init); 865 module_exit(sm_via686a_exit); 866