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/hwmon.h> 40 #include <linux/err.h> 41 #include <linux/init.h> 42 #include <asm/io.h> 43 44 45 /* If force_addr is set to anything different from 0, we forcibly enable 46 the device at the given address. */ 47 static unsigned short force_addr; 48 module_param(force_addr, ushort, 0); 49 MODULE_PARM_DESC(force_addr, 50 "Initialize the base address of the sensors"); 51 52 /* Device address 53 Note that we can't determine the ISA address until we have initialized 54 our module */ 55 static unsigned short address; 56 57 /* 58 The Via 686a southbridge has a LM78-like chip integrated on the same IC. 59 This driver is a customized copy of lm78.c 60 */ 61 62 /* Many VIA686A constants specified below */ 63 64 /* Length of ISA address segment */ 65 #define VIA686A_EXTENT 0x80 66 #define VIA686A_BASE_REG 0x70 67 #define VIA686A_ENABLE_REG 0x74 68 69 /* The VIA686A registers */ 70 /* ins numbered 0-4 */ 71 #define VIA686A_REG_IN_MAX(nr) (0x2b + ((nr) * 2)) 72 #define VIA686A_REG_IN_MIN(nr) (0x2c + ((nr) * 2)) 73 #define VIA686A_REG_IN(nr) (0x22 + (nr)) 74 75 /* fans numbered 1-2 */ 76 #define VIA686A_REG_FAN_MIN(nr) (0x3a + (nr)) 77 #define VIA686A_REG_FAN(nr) (0x28 + (nr)) 78 79 /* temps numbered 1-3 */ 80 static const u8 VIA686A_REG_TEMP[] = { 0x20, 0x21, 0x1f }; 81 static const u8 VIA686A_REG_TEMP_OVER[] = { 0x39, 0x3d, 0x1d }; 82 static const u8 VIA686A_REG_TEMP_HYST[] = { 0x3a, 0x3e, 0x1e }; 83 /* bits 7-6 */ 84 #define VIA686A_REG_TEMP_LOW1 0x4b 85 /* 2 = bits 5-4, 3 = bits 7-6 */ 86 #define VIA686A_REG_TEMP_LOW23 0x49 87 88 #define VIA686A_REG_ALARM1 0x41 89 #define VIA686A_REG_ALARM2 0x42 90 #define VIA686A_REG_FANDIV 0x47 91 #define VIA686A_REG_CONFIG 0x40 92 /* The following register sets temp interrupt mode (bits 1-0 for temp1, 93 3-2 for temp2, 5-4 for temp3). Modes are: 94 00 interrupt stays as long as value is out-of-range 95 01 interrupt is cleared once register is read (default) 96 10 comparator mode- like 00, but ignores hysteresis 97 11 same as 00 */ 98 #define VIA686A_REG_TEMP_MODE 0x4b 99 /* We'll just assume that you want to set all 3 simultaneously: */ 100 #define VIA686A_TEMP_MODE_MASK 0x3F 101 #define VIA686A_TEMP_MODE_CONTINUOUS 0x00 102 103 /* Conversions. Limit checking is only done on the TO_REG 104 variants. 105 106 ********* VOLTAGE CONVERSIONS (Bob Dougherty) ******** 107 From HWMon.cpp (Copyright 1998-2000 Jonathan Teh Soon Yew): 108 voltagefactor[0]=1.25/2628; (2628/1.25=2102.4) // Vccp 109 voltagefactor[1]=1.25/2628; (2628/1.25=2102.4) // +2.5V 110 voltagefactor[2]=1.67/2628; (2628/1.67=1573.7) // +3.3V 111 voltagefactor[3]=2.6/2628; (2628/2.60=1010.8) // +5V 112 voltagefactor[4]=6.3/2628; (2628/6.30=417.14) // +12V 113 in[i]=(data[i+2]*25.0+133)*voltagefactor[i]; 114 That is: 115 volts = (25*regVal+133)*factor 116 regVal = (volts/factor-133)/25 117 (These conversions were contributed by Jonathan Teh Soon Yew 118 <j.teh@iname.com>) */ 119 static inline u8 IN_TO_REG(long val, int inNum) 120 { 121 /* To avoid floating point, we multiply constants by 10 (100 for +12V). 122 Rounding is done (120500 is actually 133000 - 12500). 123 Remember that val is expressed in 0.001V/bit, which is why we divide 124 by an additional 10000 (100000 for +12V): 1000 for val and 10 (100) 125 for the constants. */ 126 if (inNum <= 1) 127 return (u8) 128 SENSORS_LIMIT((val * 21024 - 1205000) / 250000, 0, 255); 129 else if (inNum == 2) 130 return (u8) 131 SENSORS_LIMIT((val * 15737 - 1205000) / 250000, 0, 255); 132 else if (inNum == 3) 133 return (u8) 134 SENSORS_LIMIT((val * 10108 - 1205000) / 250000, 0, 255); 135 else 136 return (u8) 137 SENSORS_LIMIT((val * 41714 - 12050000) / 2500000, 0, 255); 138 } 139 140 static inline long IN_FROM_REG(u8 val, int inNum) 141 { 142 /* To avoid floating point, we multiply constants by 10 (100 for +12V). 143 We also multiply them by 1000 because we want 0.001V/bit for the 144 output value. Rounding is done. */ 145 if (inNum <= 1) 146 return (long) ((250000 * val + 1330000 + 21024 / 2) / 21024); 147 else if (inNum == 2) 148 return (long) ((250000 * val + 1330000 + 15737 / 2) / 15737); 149 else if (inNum == 3) 150 return (long) ((250000 * val + 1330000 + 10108 / 2) / 10108); 151 else 152 return (long) ((2500000 * val + 13300000 + 41714 / 2) / 41714); 153 } 154 155 /********* FAN RPM CONVERSIONS ********/ 156 /* Higher register values = slower fans (the fan's strobe gates a counter). 157 But this chip saturates back at 0, not at 255 like all the other chips. 158 So, 0 means 0 RPM */ 159 static inline u8 FAN_TO_REG(long rpm, int div) 160 { 161 if (rpm == 0) 162 return 0; 163 rpm = SENSORS_LIMIT(rpm, 1, 1000000); 164 return SENSORS_LIMIT((1350000 + rpm * div / 2) / (rpm * div), 1, 255); 165 } 166 167 #define FAN_FROM_REG(val,div) ((val)==0?0:(val)==255?0:1350000/((val)*(div))) 168 169 /******** TEMP CONVERSIONS (Bob Dougherty) *********/ 170 /* linear fits from HWMon.cpp (Copyright 1998-2000 Jonathan Teh Soon Yew) 171 if(temp<169) 172 return double(temp)*0.427-32.08; 173 else if(temp>=169 && temp<=202) 174 return double(temp)*0.582-58.16; 175 else 176 return double(temp)*0.924-127.33; 177 178 A fifth-order polynomial fits the unofficial data (provided by Alex van 179 Kaam <darkside@chello.nl>) a bit better. It also give more reasonable 180 numbers on my machine (ie. they agree with what my BIOS tells me). 181 Here's the fifth-order fit to the 8-bit data: 182 temp = 1.625093e-10*val^5 - 1.001632e-07*val^4 + 2.457653e-05*val^3 - 183 2.967619e-03*val^2 + 2.175144e-01*val - 7.090067e+0. 184 185 (2000-10-25- RFD: thanks to Uwe Andersen <uandersen@mayah.com> for 186 finding my typos in this formula!) 187 188 Alas, none of the elegant function-fit solutions will work because we 189 aren't allowed to use floating point in the kernel and doing it with 190 integers doesn't provide enough precision. So we'll do boring old 191 look-up table stuff. The unofficial data (see below) have effectively 192 7-bit resolution (they are rounded to the nearest degree). I'm assuming 193 that the transfer function of the device is monotonic and smooth, so a 194 smooth function fit to the data will allow us to get better precision. 195 I used the 5th-order poly fit described above and solved for 196 VIA register values 0-255. I *10 before rounding, so we get tenth-degree 197 precision. (I could have done all 1024 values for our 10-bit readings, 198 but the function is very linear in the useful range (0-80 deg C), so 199 we'll just use linear interpolation for 10-bit readings.) So, tempLUT 200 is the temp at via register values 0-255: */ 201 static const s16 tempLUT[] = 202 { -709, -688, -667, -646, -627, -607, -589, -570, -553, -536, -519, 203 -503, -487, -471, -456, -442, -428, -414, -400, -387, -375, 204 -362, -350, -339, -327, -316, -305, -295, -285, -275, -265, 205 -255, -246, -237, -229, -220, -212, -204, -196, -188, -180, 206 -173, -166, -159, -152, -145, -139, -132, -126, -120, -114, 207 -108, -102, -96, -91, -85, -80, -74, -69, -64, -59, -54, -49, 208 -44, -39, -34, -29, -25, -20, -15, -11, -6, -2, 3, 7, 12, 16, 209 20, 25, 29, 33, 37, 42, 46, 50, 54, 59, 63, 67, 71, 75, 79, 84, 210 88, 92, 96, 100, 104, 109, 113, 117, 121, 125, 130, 134, 138, 211 142, 146, 151, 155, 159, 163, 168, 172, 176, 181, 185, 189, 212 193, 198, 202, 206, 211, 215, 219, 224, 228, 232, 237, 241, 213 245, 250, 254, 259, 263, 267, 272, 276, 281, 285, 290, 294, 214 299, 303, 307, 312, 316, 321, 325, 330, 334, 339, 344, 348, 215 353, 357, 362, 366, 371, 376, 380, 385, 390, 395, 399, 404, 216 409, 414, 419, 423, 428, 433, 438, 443, 449, 454, 459, 464, 217 469, 475, 480, 486, 491, 497, 502, 508, 514, 520, 526, 532, 218 538, 544, 551, 557, 564, 571, 578, 584, 592, 599, 606, 614, 219 621, 629, 637, 645, 654, 662, 671, 680, 689, 698, 708, 718, 220 728, 738, 749, 759, 770, 782, 793, 805, 818, 830, 843, 856, 221 870, 883, 898, 912, 927, 943, 958, 975, 991, 1008, 1026, 1044, 222 1062, 1081, 1101, 1121, 1141, 1162, 1184, 1206, 1229, 1252, 223 1276, 1301, 1326, 1352, 1378, 1406, 1434, 1462 224 }; 225 226 /* the original LUT values from Alex van Kaam <darkside@chello.nl> 227 (for via register values 12-240): 228 {-50,-49,-47,-45,-43,-41,-39,-38,-37,-35,-34,-33,-32,-31, 229 -30,-29,-28,-27,-26,-25,-24,-24,-23,-22,-21,-20,-20,-19,-18,-17,-17,-16,-15, 230 -15,-14,-14,-13,-12,-12,-11,-11,-10,-9,-9,-8,-8,-7,-7,-6,-6,-5,-5,-4,-4,-3, 231 -3,-2,-2,-1,-1,0,0,1,1,1,3,3,3,4,4,4,5,5,5,6,6,7,7,8,8,9,9,9,10,10,11,11,12, 232 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, 233 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, 234 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, 235 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, 236 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, 237 85,86,88,89,91,92,94,96,97,99,101,103,105,107,109,110}; 238 239 240 Here's the reverse LUT. I got it by doing a 6-th order poly fit (needed 241 an extra term for a good fit to these inverse data!) and then 242 solving for each temp value from -50 to 110 (the useable range for 243 this chip). Here's the fit: 244 viaRegVal = -1.160370e-10*val^6 +3.193693e-08*val^5 - 1.464447e-06*val^4 245 - 2.525453e-04*val^3 + 1.424593e-02*val^2 + 2.148941e+00*val +7.275808e+01) 246 Note that n=161: */ 247 static const u8 viaLUT[] = 248 { 12, 12, 13, 14, 14, 15, 16, 16, 17, 18, 18, 19, 20, 20, 21, 22, 23, 249 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 35, 36, 37, 39, 40, 250 41, 43, 45, 46, 48, 49, 51, 53, 55, 57, 59, 60, 62, 64, 66, 251 69, 71, 73, 75, 77, 79, 82, 84, 86, 88, 91, 93, 95, 98, 100, 252 103, 105, 107, 110, 112, 115, 117, 119, 122, 124, 126, 129, 253 131, 134, 136, 138, 140, 143, 145, 147, 150, 152, 154, 156, 254 158, 160, 162, 164, 166, 168, 170, 172, 174, 176, 178, 180, 255 182, 183, 185, 187, 188, 190, 192, 193, 195, 196, 198, 199, 256 200, 202, 203, 205, 206, 207, 208, 209, 210, 211, 212, 213, 257 214, 215, 216, 217, 218, 219, 220, 221, 222, 222, 223, 224, 258 225, 226, 226, 227, 228, 228, 229, 230, 230, 231, 232, 232, 259 233, 233, 234, 235, 235, 236, 236, 237, 237, 238, 238, 239, 260 239, 240 261 }; 262 263 /* Converting temps to (8-bit) hyst and over registers 264 No interpolation here. 265 The +50 is because the temps start at -50 */ 266 static inline u8 TEMP_TO_REG(long val) 267 { 268 return viaLUT[val <= -50000 ? 0 : val >= 110000 ? 160 : 269 (val < 0 ? val - 500 : val + 500) / 1000 + 50]; 270 } 271 272 /* for 8-bit temperature hyst and over registers */ 273 #define TEMP_FROM_REG(val) ((long)tempLUT[val] * 100) 274 275 /* for 10-bit temperature readings */ 276 static inline long TEMP_FROM_REG10(u16 val) 277 { 278 u16 eightBits = val >> 2; 279 u16 twoBits = val & 3; 280 281 /* no interpolation for these */ 282 if (twoBits == 0 || eightBits == 255) 283 return TEMP_FROM_REG(eightBits); 284 285 /* do some linear interpolation */ 286 return (tempLUT[eightBits] * (4 - twoBits) + 287 tempLUT[eightBits + 1] * twoBits) * 25; 288 } 289 290 #define DIV_FROM_REG(val) (1 << (val)) 291 #define DIV_TO_REG(val) ((val)==8?3:(val)==4?2:(val)==1?0:1) 292 293 /* For the VIA686A, we need to keep some data in memory. 294 The structure is dynamically allocated, at the same time when a new 295 via686a client is allocated. */ 296 struct via686a_data { 297 struct i2c_client client; 298 struct class_device *class_dev; 299 struct semaphore update_lock; 300 char valid; /* !=0 if following fields are valid */ 301 unsigned long last_updated; /* In jiffies */ 302 303 u8 in[5]; /* Register value */ 304 u8 in_max[5]; /* Register value */ 305 u8 in_min[5]; /* Register value */ 306 u8 fan[2]; /* Register value */ 307 u8 fan_min[2]; /* Register value */ 308 u16 temp[3]; /* Register value 10 bit */ 309 u8 temp_over[3]; /* Register value */ 310 u8 temp_hyst[3]; /* Register value */ 311 u8 fan_div[2]; /* Register encoding, shifted right */ 312 u16 alarms; /* Register encoding, combined */ 313 }; 314 315 static struct pci_dev *s_bridge; /* pointer to the (only) via686a */ 316 317 static int via686a_detect(struct i2c_adapter *adapter); 318 static int via686a_detach_client(struct i2c_client *client); 319 320 static inline int via686a_read_value(struct i2c_client *client, u8 reg) 321 { 322 return (inb_p(client->addr + reg)); 323 } 324 325 static inline void via686a_write_value(struct i2c_client *client, u8 reg, 326 u8 value) 327 { 328 outb_p(value, client->addr + reg); 329 } 330 331 static struct via686a_data *via686a_update_device(struct device *dev); 332 static void via686a_init_client(struct i2c_client *client); 333 334 /* following are the sysfs callback functions */ 335 336 /* 7 voltage sensors */ 337 static ssize_t show_in(struct device *dev, char *buf, int nr) { 338 struct via686a_data *data = via686a_update_device(dev); 339 return sprintf(buf, "%ld\n", IN_FROM_REG(data->in[nr], nr)); 340 } 341 342 static ssize_t show_in_min(struct device *dev, char *buf, int nr) { 343 struct via686a_data *data = via686a_update_device(dev); 344 return sprintf(buf, "%ld\n", IN_FROM_REG(data->in_min[nr], nr)); 345 } 346 347 static ssize_t show_in_max(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_max[nr], nr)); 350 } 351 352 static ssize_t set_in_min(struct device *dev, const char *buf, 353 size_t count, int nr) { 354 struct i2c_client *client = to_i2c_client(dev); 355 struct via686a_data *data = i2c_get_clientdata(client); 356 unsigned long val = simple_strtoul(buf, NULL, 10); 357 358 down(&data->update_lock); 359 data->in_min[nr] = IN_TO_REG(val, nr); 360 via686a_write_value(client, VIA686A_REG_IN_MIN(nr), 361 data->in_min[nr]); 362 up(&data->update_lock); 363 return count; 364 } 365 static ssize_t set_in_max(struct device *dev, const char *buf, 366 size_t count, int nr) { 367 struct i2c_client *client = to_i2c_client(dev); 368 struct via686a_data *data = i2c_get_clientdata(client); 369 unsigned long val = simple_strtoul(buf, NULL, 10); 370 371 down(&data->update_lock); 372 data->in_max[nr] = IN_TO_REG(val, nr); 373 via686a_write_value(client, VIA686A_REG_IN_MAX(nr), 374 data->in_max[nr]); 375 up(&data->update_lock); 376 return count; 377 } 378 #define show_in_offset(offset) \ 379 static ssize_t \ 380 show_in##offset (struct device *dev, struct device_attribute *attr, char *buf) \ 381 { \ 382 return show_in(dev, buf, offset); \ 383 } \ 384 static ssize_t \ 385 show_in##offset##_min (struct device *dev, struct device_attribute *attr, char *buf) \ 386 { \ 387 return show_in_min(dev, buf, offset); \ 388 } \ 389 static ssize_t \ 390 show_in##offset##_max (struct device *dev, struct device_attribute *attr, char *buf) \ 391 { \ 392 return show_in_max(dev, buf, offset); \ 393 } \ 394 static ssize_t set_in##offset##_min (struct device *dev, struct device_attribute *attr, \ 395 const char *buf, size_t count) \ 396 { \ 397 return set_in_min(dev, buf, count, offset); \ 398 } \ 399 static ssize_t set_in##offset##_max (struct device *dev, struct device_attribute *attr, \ 400 const char *buf, size_t count) \ 401 { \ 402 return set_in_max(dev, buf, count, offset); \ 403 } \ 404 static DEVICE_ATTR(in##offset##_input, S_IRUGO, show_in##offset, NULL);\ 405 static DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \ 406 show_in##offset##_min, set_in##offset##_min); \ 407 static DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \ 408 show_in##offset##_max, set_in##offset##_max); 409 410 show_in_offset(0); 411 show_in_offset(1); 412 show_in_offset(2); 413 show_in_offset(3); 414 show_in_offset(4); 415 416 /* 3 temperatures */ 417 static ssize_t show_temp(struct device *dev, char *buf, int nr) { 418 struct via686a_data *data = via686a_update_device(dev); 419 return sprintf(buf, "%ld\n", TEMP_FROM_REG10(data->temp[nr])); 420 } 421 static ssize_t show_temp_over(struct device *dev, char *buf, int nr) { 422 struct via686a_data *data = via686a_update_device(dev); 423 return sprintf(buf, "%ld\n", TEMP_FROM_REG(data->temp_over[nr])); 424 } 425 static ssize_t show_temp_hyst(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_hyst[nr])); 428 } 429 static ssize_t set_temp_over(struct device *dev, const char *buf, 430 size_t count, int nr) { 431 struct i2c_client *client = to_i2c_client(dev); 432 struct via686a_data *data = i2c_get_clientdata(client); 433 int val = simple_strtol(buf, NULL, 10); 434 435 down(&data->update_lock); 436 data->temp_over[nr] = TEMP_TO_REG(val); 437 via686a_write_value(client, VIA686A_REG_TEMP_OVER[nr], 438 data->temp_over[nr]); 439 up(&data->update_lock); 440 return count; 441 } 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); 447 448 down(&data->update_lock); 449 data->temp_hyst[nr] = TEMP_TO_REG(val); 450 via686a_write_value(client, VIA686A_REG_TEMP_HYST[nr], 451 data->temp_hyst[nr]); 452 up(&data->update_lock); 453 return count; 454 } 455 #define show_temp_offset(offset) \ 456 static ssize_t show_temp_##offset (struct device *dev, struct device_attribute *attr, char *buf) \ 457 { \ 458 return show_temp(dev, buf, offset - 1); \ 459 } \ 460 static ssize_t \ 461 show_temp_##offset##_over (struct device *dev, struct device_attribute *attr, char *buf) \ 462 { \ 463 return show_temp_over(dev, buf, offset - 1); \ 464 } \ 465 static ssize_t \ 466 show_temp_##offset##_hyst (struct device *dev, struct device_attribute *attr, char *buf) \ 467 { \ 468 return show_temp_hyst(dev, buf, offset - 1); \ 469 } \ 470 static ssize_t set_temp_##offset##_over (struct device *dev, struct device_attribute *attr, \ 471 const char *buf, size_t count) \ 472 { \ 473 return set_temp_over(dev, buf, count, offset - 1); \ 474 } \ 475 static ssize_t set_temp_##offset##_hyst (struct device *dev, struct device_attribute *attr, \ 476 const char *buf, size_t count) \ 477 { \ 478 return set_temp_hyst(dev, buf, count, offset - 1); \ 479 } \ 480 static DEVICE_ATTR(temp##offset##_input, S_IRUGO, show_temp_##offset, NULL);\ 481 static DEVICE_ATTR(temp##offset##_max, S_IRUGO | S_IWUSR, \ 482 show_temp_##offset##_over, set_temp_##offset##_over); \ 483 static DEVICE_ATTR(temp##offset##_max_hyst, S_IRUGO | S_IWUSR, \ 484 show_temp_##offset##_hyst, set_temp_##offset##_hyst); 485 486 show_temp_offset(1); 487 show_temp_offset(2); 488 show_temp_offset(3); 489 490 /* 2 Fans */ 491 static ssize_t show_fan(struct device *dev, char *buf, int nr) { 492 struct via686a_data *data = via686a_update_device(dev); 493 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[nr], 494 DIV_FROM_REG(data->fan_div[nr])) ); 495 } 496 static ssize_t show_fan_min(struct device *dev, char *buf, int nr) { 497 struct via686a_data *data = via686a_update_device(dev); 498 return sprintf(buf, "%d\n", 499 FAN_FROM_REG(data->fan_min[nr], DIV_FROM_REG(data->fan_div[nr])) ); 500 } 501 static ssize_t show_fan_div(struct device *dev, char *buf, int nr) { 502 struct via686a_data *data = via686a_update_device(dev); 503 return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr]) ); 504 } 505 static ssize_t set_fan_min(struct device *dev, const char *buf, 506 size_t count, int nr) { 507 struct i2c_client *client = to_i2c_client(dev); 508 struct via686a_data *data = i2c_get_clientdata(client); 509 int val = simple_strtol(buf, NULL, 10); 510 511 down(&data->update_lock); 512 data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr])); 513 via686a_write_value(client, VIA686A_REG_FAN_MIN(nr+1), data->fan_min[nr]); 514 up(&data->update_lock); 515 return count; 516 } 517 static ssize_t set_fan_div(struct device *dev, const char *buf, 518 size_t count, int nr) { 519 struct i2c_client *client = to_i2c_client(dev); 520 struct via686a_data *data = i2c_get_clientdata(client); 521 int val = simple_strtol(buf, NULL, 10); 522 int old; 523 524 down(&data->update_lock); 525 old = via686a_read_value(client, VIA686A_REG_FANDIV); 526 data->fan_div[nr] = DIV_TO_REG(val); 527 old = (old & 0x0f) | (data->fan_div[1] << 6) | (data->fan_div[0] << 4); 528 via686a_write_value(client, VIA686A_REG_FANDIV, old); 529 up(&data->update_lock); 530 return count; 531 } 532 533 #define show_fan_offset(offset) \ 534 static ssize_t show_fan_##offset (struct device *dev, struct device_attribute *attr, char *buf) \ 535 { \ 536 return show_fan(dev, buf, offset - 1); \ 537 } \ 538 static ssize_t show_fan_##offset##_min (struct device *dev, struct device_attribute *attr, char *buf) \ 539 { \ 540 return show_fan_min(dev, buf, offset - 1); \ 541 } \ 542 static ssize_t show_fan_##offset##_div (struct device *dev, struct device_attribute *attr, char *buf) \ 543 { \ 544 return show_fan_div(dev, buf, offset - 1); \ 545 } \ 546 static ssize_t set_fan_##offset##_min (struct device *dev, struct device_attribute *attr, \ 547 const char *buf, size_t count) \ 548 { \ 549 return set_fan_min(dev, buf, count, offset - 1); \ 550 } \ 551 static ssize_t set_fan_##offset##_div (struct device *dev, struct device_attribute *attr, \ 552 const char *buf, size_t count) \ 553 { \ 554 return set_fan_div(dev, buf, count, offset - 1); \ 555 } \ 556 static DEVICE_ATTR(fan##offset##_input, S_IRUGO, show_fan_##offset, NULL);\ 557 static DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \ 558 show_fan_##offset##_min, set_fan_##offset##_min); \ 559 static DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR, \ 560 show_fan_##offset##_div, set_fan_##offset##_div); 561 562 show_fan_offset(1); 563 show_fan_offset(2); 564 565 /* Alarms */ 566 static ssize_t show_alarms(struct device *dev, struct device_attribute *attr, char *buf) { 567 struct via686a_data *data = via686a_update_device(dev); 568 return sprintf(buf, "%u\n", data->alarms); 569 } 570 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL); 571 572 /* The driver. I choose to use type i2c_driver, as at is identical to both 573 smbus_driver and isa_driver, and clients could be of either kind */ 574 static struct i2c_driver via686a_driver = { 575 .owner = THIS_MODULE, 576 .name = "via686a", 577 .attach_adapter = via686a_detect, 578 .detach_client = via686a_detach_client, 579 }; 580 581 582 /* This is called when the module is loaded */ 583 static int via686a_detect(struct i2c_adapter *adapter) 584 { 585 struct i2c_client *new_client; 586 struct via686a_data *data; 587 int err = 0; 588 const char client_name[] = "via686a"; 589 u16 val; 590 591 /* 8231 requires multiple of 256, we enforce that on 686 as well */ 592 if (force_addr) { 593 address = force_addr & 0xFF00; 594 dev_warn(&adapter->dev, "forcing ISA address 0x%04X\n", 595 address); 596 if (PCIBIOS_SUCCESSFUL != 597 pci_write_config_word(s_bridge, VIA686A_BASE_REG, address)) 598 return -ENODEV; 599 } 600 if (PCIBIOS_SUCCESSFUL != 601 pci_read_config_word(s_bridge, VIA686A_ENABLE_REG, &val)) 602 return -ENODEV; 603 if (!(val & 0x0001)) { 604 if (force_addr) { 605 dev_info(&adapter->dev, "enabling sensors\n"); 606 if (PCIBIOS_SUCCESSFUL != 607 pci_write_config_word(s_bridge, VIA686A_ENABLE_REG, 608 val | 0x0001)) 609 return -ENODEV; 610 } else { 611 dev_warn(&adapter->dev, "sensors disabled - enable " 612 "with force_addr=0x%x\n", address); 613 return -ENODEV; 614 } 615 } 616 617 /* Reserve the ISA region */ 618 if (!request_region(address, VIA686A_EXTENT, via686a_driver.name)) { 619 dev_err(&adapter->dev, "region 0x%x already in use!\n", 620 address); 621 return -ENODEV; 622 } 623 624 if (!(data = kzalloc(sizeof(struct via686a_data), GFP_KERNEL))) { 625 err = -ENOMEM; 626 goto exit_release; 627 } 628 629 new_client = &data->client; 630 i2c_set_clientdata(new_client, data); 631 new_client->addr = address; 632 new_client->adapter = adapter; 633 new_client->driver = &via686a_driver; 634 new_client->flags = 0; 635 636 /* Fill in the remaining client fields and put into the global list */ 637 strlcpy(new_client->name, client_name, I2C_NAME_SIZE); 638 639 data->valid = 0; 640 init_MUTEX(&data->update_lock); 641 /* Tell the I2C layer a new client has arrived */ 642 if ((err = i2c_attach_client(new_client))) 643 goto exit_free; 644 645 /* Initialize the VIA686A chip */ 646 via686a_init_client(new_client); 647 648 /* Register sysfs hooks */ 649 data->class_dev = hwmon_device_register(&new_client->dev); 650 if (IS_ERR(data->class_dev)) { 651 err = PTR_ERR(data->class_dev); 652 goto exit_detach; 653 } 654 655 device_create_file(&new_client->dev, &dev_attr_in0_input); 656 device_create_file(&new_client->dev, &dev_attr_in1_input); 657 device_create_file(&new_client->dev, &dev_attr_in2_input); 658 device_create_file(&new_client->dev, &dev_attr_in3_input); 659 device_create_file(&new_client->dev, &dev_attr_in4_input); 660 device_create_file(&new_client->dev, &dev_attr_in0_min); 661 device_create_file(&new_client->dev, &dev_attr_in1_min); 662 device_create_file(&new_client->dev, &dev_attr_in2_min); 663 device_create_file(&new_client->dev, &dev_attr_in3_min); 664 device_create_file(&new_client->dev, &dev_attr_in4_min); 665 device_create_file(&new_client->dev, &dev_attr_in0_max); 666 device_create_file(&new_client->dev, &dev_attr_in1_max); 667 device_create_file(&new_client->dev, &dev_attr_in2_max); 668 device_create_file(&new_client->dev, &dev_attr_in3_max); 669 device_create_file(&new_client->dev, &dev_attr_in4_max); 670 device_create_file(&new_client->dev, &dev_attr_temp1_input); 671 device_create_file(&new_client->dev, &dev_attr_temp2_input); 672 device_create_file(&new_client->dev, &dev_attr_temp3_input); 673 device_create_file(&new_client->dev, &dev_attr_temp1_max); 674 device_create_file(&new_client->dev, &dev_attr_temp2_max); 675 device_create_file(&new_client->dev, &dev_attr_temp3_max); 676 device_create_file(&new_client->dev, &dev_attr_temp1_max_hyst); 677 device_create_file(&new_client->dev, &dev_attr_temp2_max_hyst); 678 device_create_file(&new_client->dev, &dev_attr_temp3_max_hyst); 679 device_create_file(&new_client->dev, &dev_attr_fan1_input); 680 device_create_file(&new_client->dev, &dev_attr_fan2_input); 681 device_create_file(&new_client->dev, &dev_attr_fan1_min); 682 device_create_file(&new_client->dev, &dev_attr_fan2_min); 683 device_create_file(&new_client->dev, &dev_attr_fan1_div); 684 device_create_file(&new_client->dev, &dev_attr_fan2_div); 685 device_create_file(&new_client->dev, &dev_attr_alarms); 686 687 return 0; 688 689 exit_detach: 690 i2c_detach_client(new_client); 691 exit_free: 692 kfree(data); 693 exit_release: 694 release_region(address, VIA686A_EXTENT); 695 return err; 696 } 697 698 static int via686a_detach_client(struct i2c_client *client) 699 { 700 struct via686a_data *data = i2c_get_clientdata(client); 701 int err; 702 703 hwmon_device_unregister(data->class_dev); 704 705 if ((err = i2c_detach_client(client))) 706 return err; 707 708 release_region(client->addr, VIA686A_EXTENT); 709 kfree(data); 710 711 return 0; 712 } 713 714 static void via686a_init_client(struct i2c_client *client) 715 { 716 u8 reg; 717 718 /* Start monitoring */ 719 reg = via686a_read_value(client, VIA686A_REG_CONFIG); 720 via686a_write_value(client, VIA686A_REG_CONFIG, (reg|0x01)&0x7F); 721 722 /* Configure temp interrupt mode for continuous-interrupt operation */ 723 via686a_write_value(client, VIA686A_REG_TEMP_MODE, 724 via686a_read_value(client, VIA686A_REG_TEMP_MODE) & 725 !(VIA686A_TEMP_MODE_MASK | VIA686A_TEMP_MODE_CONTINUOUS)); 726 } 727 728 static struct via686a_data *via686a_update_device(struct device *dev) 729 { 730 struct i2c_client *client = to_i2c_client(dev); 731 struct via686a_data *data = i2c_get_clientdata(client); 732 int i; 733 734 down(&data->update_lock); 735 736 if (time_after(jiffies, data->last_updated + HZ + HZ / 2) 737 || !data->valid) { 738 for (i = 0; i <= 4; i++) { 739 data->in[i] = 740 via686a_read_value(client, VIA686A_REG_IN(i)); 741 data->in_min[i] = via686a_read_value(client, 742 VIA686A_REG_IN_MIN 743 (i)); 744 data->in_max[i] = 745 via686a_read_value(client, VIA686A_REG_IN_MAX(i)); 746 } 747 for (i = 1; i <= 2; i++) { 748 data->fan[i - 1] = 749 via686a_read_value(client, VIA686A_REG_FAN(i)); 750 data->fan_min[i - 1] = via686a_read_value(client, 751 VIA686A_REG_FAN_MIN(i)); 752 } 753 for (i = 0; i <= 2; i++) { 754 data->temp[i] = via686a_read_value(client, 755 VIA686A_REG_TEMP[i]) << 2; 756 data->temp_over[i] = 757 via686a_read_value(client, 758 VIA686A_REG_TEMP_OVER[i]); 759 data->temp_hyst[i] = 760 via686a_read_value(client, 761 VIA686A_REG_TEMP_HYST[i]); 762 } 763 /* add in lower 2 bits 764 temp1 uses bits 7-6 of VIA686A_REG_TEMP_LOW1 765 temp2 uses bits 5-4 of VIA686A_REG_TEMP_LOW23 766 temp3 uses bits 7-6 of VIA686A_REG_TEMP_LOW23 767 */ 768 data->temp[0] |= (via686a_read_value(client, 769 VIA686A_REG_TEMP_LOW1) 770 & 0xc0) >> 6; 771 data->temp[1] |= 772 (via686a_read_value(client, VIA686A_REG_TEMP_LOW23) & 773 0x30) >> 4; 774 data->temp[2] |= 775 (via686a_read_value(client, VIA686A_REG_TEMP_LOW23) & 776 0xc0) >> 6; 777 778 i = via686a_read_value(client, VIA686A_REG_FANDIV); 779 data->fan_div[0] = (i >> 4) & 0x03; 780 data->fan_div[1] = i >> 6; 781 data->alarms = 782 via686a_read_value(client, 783 VIA686A_REG_ALARM1) | 784 (via686a_read_value(client, VIA686A_REG_ALARM2) << 8); 785 data->last_updated = jiffies; 786 data->valid = 1; 787 } 788 789 up(&data->update_lock); 790 791 return data; 792 } 793 794 static struct pci_device_id via686a_pci_ids[] = { 795 { PCI_DEVICE(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C686_4) }, 796 { 0, } 797 }; 798 799 MODULE_DEVICE_TABLE(pci, via686a_pci_ids); 800 801 static int __devinit via686a_pci_probe(struct pci_dev *dev, 802 const struct pci_device_id *id) 803 { 804 u16 val; 805 806 if (PCIBIOS_SUCCESSFUL != 807 pci_read_config_word(dev, VIA686A_BASE_REG, &val)) 808 return -ENODEV; 809 810 address = val & ~(VIA686A_EXTENT - 1); 811 if (address == 0 && force_addr == 0) { 812 dev_err(&dev->dev, "base address not set - upgrade BIOS " 813 "or use force_addr=0xaddr\n"); 814 return -ENODEV; 815 } 816 817 s_bridge = pci_dev_get(dev); 818 if (i2c_isa_add_driver(&via686a_driver)) { 819 pci_dev_put(s_bridge); 820 s_bridge = NULL; 821 } 822 823 /* Always return failure here. This is to allow other drivers to bind 824 * to this pci device. We don't really want to have control over the 825 * pci device, we only wanted to read as few register values from it. 826 */ 827 return -ENODEV; 828 } 829 830 static struct pci_driver via686a_pci_driver = { 831 .name = "via686a", 832 .id_table = via686a_pci_ids, 833 .probe = via686a_pci_probe, 834 }; 835 836 static int __init sm_via686a_init(void) 837 { 838 return pci_register_driver(&via686a_pci_driver); 839 } 840 841 static void __exit sm_via686a_exit(void) 842 { 843 pci_unregister_driver(&via686a_pci_driver); 844 if (s_bridge != NULL) { 845 i2c_isa_del_driver(&via686a_driver); 846 pci_dev_put(s_bridge); 847 s_bridge = NULL; 848 } 849 } 850 851 MODULE_AUTHOR("Ky�sti M�lkki <kmalkki@cc.hut.fi>, " 852 "Mark Studebaker <mdsxyz123@yahoo.com> " 853 "and Bob Dougherty <bobd@stanford.edu>"); 854 MODULE_DESCRIPTION("VIA 686A Sensor device"); 855 MODULE_LICENSE("GPL"); 856 857 module_init(sm_via686a_init); 858 module_exit(sm_via686a_exit); 859