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 /* Addresses to scan. 54 Note that we can't determine the ISA address until we have initialized 55 our module */ 56 static unsigned short normal_i2c[] = { I2C_CLIENT_END }; 57 static unsigned int normal_isa[] = { 0x0000, I2C_CLIENT_ISA_END }; 58 59 /* Insmod parameters */ 60 SENSORS_INSMOD_1(via686a); 61 62 /* 63 The Via 686a southbridge has a LM78-like chip integrated on the same IC. 64 This driver is a customized copy of lm78.c 65 */ 66 67 /* Many VIA686A constants specified below */ 68 69 /* Length of ISA address segment */ 70 #define VIA686A_EXTENT 0x80 71 #define VIA686A_BASE_REG 0x70 72 #define VIA686A_ENABLE_REG 0x74 73 74 /* The VIA686A registers */ 75 /* ins numbered 0-4 */ 76 #define VIA686A_REG_IN_MAX(nr) (0x2b + ((nr) * 2)) 77 #define VIA686A_REG_IN_MIN(nr) (0x2c + ((nr) * 2)) 78 #define VIA686A_REG_IN(nr) (0x22 + (nr)) 79 80 /* fans numbered 1-2 */ 81 #define VIA686A_REG_FAN_MIN(nr) (0x3a + (nr)) 82 #define VIA686A_REG_FAN(nr) (0x28 + (nr)) 83 84 /* temps numbered 1-3 */ 85 static const u8 VIA686A_REG_TEMP[] = { 0x20, 0x21, 0x1f }; 86 static const u8 VIA686A_REG_TEMP_OVER[] = { 0x39, 0x3d, 0x1d }; 87 static const u8 VIA686A_REG_TEMP_HYST[] = { 0x3a, 0x3e, 0x1e }; 88 /* bits 7-6 */ 89 #define VIA686A_REG_TEMP_LOW1 0x4b 90 /* 2 = bits 5-4, 3 = bits 7-6 */ 91 #define VIA686A_REG_TEMP_LOW23 0x49 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>) */ 124 static 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 } 144 145 static 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 */ 164 static 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 provide 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: */ 206 static 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, 237 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, 238 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, 239 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, 240 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, 241 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, 242 85,86,88,89,91,92,94,96,97,99,101,103,105,107,109,110}; 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: */ 252 static 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 */ 271 static 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 */ 281 static 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 DIV_FROM_REG(val) (1 << (val)) 296 #define DIV_TO_REG(val) ((val)==8?3:(val)==4?2:(val)==1?0:1) 297 298 /* For the VIA686A, we need to keep some data in memory. 299 The structure is dynamically allocated, at the same time when a new 300 via686a client is allocated. */ 301 struct via686a_data { 302 struct i2c_client client; 303 struct class_device *class_dev; 304 struct semaphore update_lock; 305 char valid; /* !=0 if following fields are valid */ 306 unsigned long last_updated; /* In jiffies */ 307 308 u8 in[5]; /* Register value */ 309 u8 in_max[5]; /* Register value */ 310 u8 in_min[5]; /* Register value */ 311 u8 fan[2]; /* Register value */ 312 u8 fan_min[2]; /* Register value */ 313 u16 temp[3]; /* Register value 10 bit */ 314 u8 temp_over[3]; /* Register value */ 315 u8 temp_hyst[3]; /* Register value */ 316 u8 fan_div[2]; /* Register encoding, shifted right */ 317 u16 alarms; /* Register encoding, combined */ 318 }; 319 320 static struct pci_dev *s_bridge; /* pointer to the (only) via686a */ 321 322 static int via686a_attach_adapter(struct i2c_adapter *adapter); 323 static int via686a_detect(struct i2c_adapter *adapter, int address, int kind); 324 static int via686a_detach_client(struct i2c_client *client); 325 326 static inline int via686a_read_value(struct i2c_client *client, u8 reg) 327 { 328 return (inb_p(client->addr + reg)); 329 } 330 331 static inline void via686a_write_value(struct i2c_client *client, u8 reg, 332 u8 value) 333 { 334 outb_p(value, client->addr + reg); 335 } 336 337 static struct via686a_data *via686a_update_device(struct device *dev); 338 static void via686a_init_client(struct i2c_client *client); 339 340 /* following are the sysfs callback functions */ 341 342 /* 7 voltage sensors */ 343 static ssize_t show_in(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[nr], nr)); 346 } 347 348 static ssize_t show_in_min(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_min[nr], nr)); 351 } 352 353 static ssize_t show_in_max(struct device *dev, char *buf, int nr) { 354 struct via686a_data *data = via686a_update_device(dev); 355 return sprintf(buf, "%ld\n", IN_FROM_REG(data->in_max[nr], nr)); 356 } 357 358 static ssize_t set_in_min(struct device *dev, const char *buf, 359 size_t count, int nr) { 360 struct i2c_client *client = to_i2c_client(dev); 361 struct via686a_data *data = i2c_get_clientdata(client); 362 unsigned long val = simple_strtoul(buf, NULL, 10); 363 364 down(&data->update_lock); 365 data->in_min[nr] = IN_TO_REG(val, nr); 366 via686a_write_value(client, VIA686A_REG_IN_MIN(nr), 367 data->in_min[nr]); 368 up(&data->update_lock); 369 return count; 370 } 371 static ssize_t set_in_max(struct device *dev, const char *buf, 372 size_t count, int nr) { 373 struct i2c_client *client = to_i2c_client(dev); 374 struct via686a_data *data = i2c_get_clientdata(client); 375 unsigned long val = simple_strtoul(buf, NULL, 10); 376 377 down(&data->update_lock); 378 data->in_max[nr] = IN_TO_REG(val, nr); 379 via686a_write_value(client, VIA686A_REG_IN_MAX(nr), 380 data->in_max[nr]); 381 up(&data->update_lock); 382 return count; 383 } 384 #define show_in_offset(offset) \ 385 static ssize_t \ 386 show_in##offset (struct device *dev, struct device_attribute *attr, char *buf) \ 387 { \ 388 return show_in(dev, buf, offset); \ 389 } \ 390 static ssize_t \ 391 show_in##offset##_min (struct device *dev, struct device_attribute *attr, char *buf) \ 392 { \ 393 return show_in_min(dev, buf, offset); \ 394 } \ 395 static ssize_t \ 396 show_in##offset##_max (struct device *dev, struct device_attribute *attr, char *buf) \ 397 { \ 398 return show_in_max(dev, buf, offset); \ 399 } \ 400 static ssize_t set_in##offset##_min (struct device *dev, struct device_attribute *attr, \ 401 const char *buf, size_t count) \ 402 { \ 403 return set_in_min(dev, buf, count, offset); \ 404 } \ 405 static ssize_t set_in##offset##_max (struct device *dev, struct device_attribute *attr, \ 406 const char *buf, size_t count) \ 407 { \ 408 return set_in_max(dev, buf, count, offset); \ 409 } \ 410 static DEVICE_ATTR(in##offset##_input, S_IRUGO, show_in##offset, NULL);\ 411 static DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \ 412 show_in##offset##_min, set_in##offset##_min); \ 413 static DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \ 414 show_in##offset##_max, set_in##offset##_max); 415 416 show_in_offset(0); 417 show_in_offset(1); 418 show_in_offset(2); 419 show_in_offset(3); 420 show_in_offset(4); 421 422 /* 3 temperatures */ 423 static ssize_t show_temp(struct device *dev, char *buf, int nr) { 424 struct via686a_data *data = via686a_update_device(dev); 425 return sprintf(buf, "%ld\n", TEMP_FROM_REG10(data->temp[nr])); 426 } 427 static ssize_t show_temp_over(struct device *dev, char *buf, int nr) { 428 struct via686a_data *data = via686a_update_device(dev); 429 return sprintf(buf, "%ld\n", TEMP_FROM_REG(data->temp_over[nr])); 430 } 431 static ssize_t show_temp_hyst(struct device *dev, char *buf, int nr) { 432 struct via686a_data *data = via686a_update_device(dev); 433 return sprintf(buf, "%ld\n", TEMP_FROM_REG(data->temp_hyst[nr])); 434 } 435 static ssize_t set_temp_over(struct device *dev, const char *buf, 436 size_t count, int nr) { 437 struct i2c_client *client = to_i2c_client(dev); 438 struct via686a_data *data = i2c_get_clientdata(client); 439 int val = simple_strtol(buf, NULL, 10); 440 441 down(&data->update_lock); 442 data->temp_over[nr] = TEMP_TO_REG(val); 443 via686a_write_value(client, VIA686A_REG_TEMP_OVER[nr], 444 data->temp_over[nr]); 445 up(&data->update_lock); 446 return count; 447 } 448 static 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], 457 data->temp_hyst[nr]); 458 up(&data->update_lock); 459 return count; 460 } 461 #define show_temp_offset(offset) \ 462 static ssize_t show_temp_##offset (struct device *dev, struct device_attribute *attr, char *buf) \ 463 { \ 464 return show_temp(dev, buf, offset - 1); \ 465 } \ 466 static ssize_t \ 467 show_temp_##offset##_over (struct device *dev, struct device_attribute *attr, char *buf) \ 468 { \ 469 return show_temp_over(dev, buf, offset - 1); \ 470 } \ 471 static ssize_t \ 472 show_temp_##offset##_hyst (struct device *dev, struct device_attribute *attr, char *buf) \ 473 { \ 474 return show_temp_hyst(dev, buf, offset - 1); \ 475 } \ 476 static ssize_t set_temp_##offset##_over (struct device *dev, struct device_attribute *attr, \ 477 const char *buf, size_t count) \ 478 { \ 479 return set_temp_over(dev, buf, count, offset - 1); \ 480 } \ 481 static ssize_t set_temp_##offset##_hyst (struct device *dev, struct device_attribute *attr, \ 482 const char *buf, size_t count) \ 483 { \ 484 return set_temp_hyst(dev, buf, count, offset - 1); \ 485 } \ 486 static DEVICE_ATTR(temp##offset##_input, S_IRUGO, show_temp_##offset, NULL);\ 487 static DEVICE_ATTR(temp##offset##_max, S_IRUGO | S_IWUSR, \ 488 show_temp_##offset##_over, set_temp_##offset##_over); \ 489 static DEVICE_ATTR(temp##offset##_max_hyst, S_IRUGO | S_IWUSR, \ 490 show_temp_##offset##_hyst, set_temp_##offset##_hyst); 491 492 show_temp_offset(1); 493 show_temp_offset(2); 494 show_temp_offset(3); 495 496 /* 2 Fans */ 497 static ssize_t show_fan(struct device *dev, char *buf, int nr) { 498 struct via686a_data *data = via686a_update_device(dev); 499 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[nr], 500 DIV_FROM_REG(data->fan_div[nr])) ); 501 } 502 static ssize_t show_fan_min(struct device *dev, char *buf, int nr) { 503 struct via686a_data *data = via686a_update_device(dev); 504 return sprintf(buf, "%d\n", 505 FAN_FROM_REG(data->fan_min[nr], DIV_FROM_REG(data->fan_div[nr])) ); 506 } 507 static ssize_t show_fan_div(struct device *dev, char *buf, int nr) { 508 struct via686a_data *data = via686a_update_device(dev); 509 return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr]) ); 510 } 511 static ssize_t set_fan_min(struct device *dev, const char *buf, 512 size_t count, int nr) { 513 struct i2c_client *client = to_i2c_client(dev); 514 struct via686a_data *data = i2c_get_clientdata(client); 515 int val = simple_strtol(buf, NULL, 10); 516 517 down(&data->update_lock); 518 data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr])); 519 via686a_write_value(client, VIA686A_REG_FAN_MIN(nr+1), data->fan_min[nr]); 520 up(&data->update_lock); 521 return count; 522 } 523 static ssize_t set_fan_div(struct device *dev, const char *buf, 524 size_t count, int nr) { 525 struct i2c_client *client = to_i2c_client(dev); 526 struct via686a_data *data = i2c_get_clientdata(client); 527 int val = simple_strtol(buf, NULL, 10); 528 int old; 529 530 down(&data->update_lock); 531 old = via686a_read_value(client, VIA686A_REG_FANDIV); 532 data->fan_div[nr] = DIV_TO_REG(val); 533 old = (old & 0x0f) | (data->fan_div[1] << 6) | (data->fan_div[0] << 4); 534 via686a_write_value(client, VIA686A_REG_FANDIV, old); 535 up(&data->update_lock); 536 return count; 537 } 538 539 #define show_fan_offset(offset) \ 540 static ssize_t show_fan_##offset (struct device *dev, struct device_attribute *attr, char *buf) \ 541 { \ 542 return show_fan(dev, buf, offset - 1); \ 543 } \ 544 static ssize_t show_fan_##offset##_min (struct device *dev, struct device_attribute *attr, char *buf) \ 545 { \ 546 return show_fan_min(dev, buf, offset - 1); \ 547 } \ 548 static ssize_t show_fan_##offset##_div (struct device *dev, struct device_attribute *attr, char *buf) \ 549 { \ 550 return show_fan_div(dev, buf, offset - 1); \ 551 } \ 552 static ssize_t set_fan_##offset##_min (struct device *dev, struct device_attribute *attr, \ 553 const char *buf, size_t count) \ 554 { \ 555 return set_fan_min(dev, buf, count, offset - 1); \ 556 } \ 557 static ssize_t set_fan_##offset##_div (struct device *dev, struct device_attribute *attr, \ 558 const char *buf, size_t count) \ 559 { \ 560 return set_fan_div(dev, buf, count, offset - 1); \ 561 } \ 562 static DEVICE_ATTR(fan##offset##_input, S_IRUGO, show_fan_##offset, NULL);\ 563 static DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \ 564 show_fan_##offset##_min, set_fan_##offset##_min); \ 565 static DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR, \ 566 show_fan_##offset##_div, set_fan_##offset##_div); 567 568 show_fan_offset(1); 569 show_fan_offset(2); 570 571 /* Alarms */ 572 static ssize_t show_alarms(struct device *dev, struct device_attribute *attr, char *buf) { 573 struct via686a_data *data = via686a_update_device(dev); 574 return sprintf(buf, "%u\n", data->alarms); 575 } 576 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL); 577 578 /* The driver. I choose to use type i2c_driver, as at is identical to both 579 smbus_driver and isa_driver, and clients could be of either kind */ 580 static struct i2c_driver via686a_driver = { 581 .owner = THIS_MODULE, 582 .name = "via686a", 583 .id = I2C_DRIVERID_VIA686A, 584 .flags = I2C_DF_NOTIFY, 585 .attach_adapter = via686a_attach_adapter, 586 .detach_client = via686a_detach_client, 587 }; 588 589 590 /* This is called when the module is loaded */ 591 static int via686a_attach_adapter(struct i2c_adapter *adapter) 592 { 593 if (!(adapter->class & I2C_CLASS_HWMON)) 594 return 0; 595 return i2c_detect(adapter, &addr_data, via686a_detect); 596 } 597 598 static int via686a_detect(struct i2c_adapter *adapter, int address, int kind) 599 { 600 struct i2c_client *new_client; 601 struct via686a_data *data; 602 int err = 0; 603 const char client_name[] = "via686a"; 604 u16 val; 605 606 /* Make sure we are probing the ISA bus!! */ 607 if (!i2c_is_isa_adapter(adapter)) { 608 dev_err(&adapter->dev, 609 "via686a_detect called for an I2C bus adapter?!?\n"); 610 return 0; 611 } 612 613 /* 8231 requires multiple of 256, we enforce that on 686 as well */ 614 if (force_addr) 615 address = force_addr & 0xFF00; 616 617 if (force_addr) { 618 dev_warn(&adapter->dev, "forcing ISA address 0x%04X\n", 619 address); 620 if (PCIBIOS_SUCCESSFUL != 621 pci_write_config_word(s_bridge, VIA686A_BASE_REG, address)) 622 return -ENODEV; 623 } 624 if (PCIBIOS_SUCCESSFUL != 625 pci_read_config_word(s_bridge, VIA686A_ENABLE_REG, &val)) 626 return -ENODEV; 627 if (!(val & 0x0001)) { 628 dev_warn(&adapter->dev, "enabling sensors\n"); 629 if (PCIBIOS_SUCCESSFUL != 630 pci_write_config_word(s_bridge, VIA686A_ENABLE_REG, 631 val | 0x0001)) 632 return -ENODEV; 633 } 634 635 /* Reserve the ISA region */ 636 if (!request_region(address, VIA686A_EXTENT, via686a_driver.name)) { 637 dev_err(&adapter->dev, "region 0x%x already in use!\n", 638 address); 639 return -ENODEV; 640 } 641 642 if (!(data = kmalloc(sizeof(struct via686a_data), GFP_KERNEL))) { 643 err = -ENOMEM; 644 goto exit_release; 645 } 646 memset(data, 0, sizeof(struct via686a_data)); 647 648 new_client = &data->client; 649 i2c_set_clientdata(new_client, data); 650 new_client->addr = address; 651 new_client->adapter = adapter; 652 new_client->driver = &via686a_driver; 653 new_client->flags = 0; 654 655 /* Fill in the remaining client fields and put into the global list */ 656 strlcpy(new_client->name, client_name, I2C_NAME_SIZE); 657 658 data->valid = 0; 659 init_MUTEX(&data->update_lock); 660 /* Tell the I2C layer a new client has arrived */ 661 if ((err = i2c_attach_client(new_client))) 662 goto exit_free; 663 664 /* Initialize the VIA686A chip */ 665 via686a_init_client(new_client); 666 667 /* Register sysfs hooks */ 668 data->class_dev = hwmon_device_register(&new_client->dev); 669 if (IS_ERR(data->class_dev)) { 670 err = PTR_ERR(data->class_dev); 671 goto exit_detach; 672 } 673 674 device_create_file(&new_client->dev, &dev_attr_in0_input); 675 device_create_file(&new_client->dev, &dev_attr_in1_input); 676 device_create_file(&new_client->dev, &dev_attr_in2_input); 677 device_create_file(&new_client->dev, &dev_attr_in3_input); 678 device_create_file(&new_client->dev, &dev_attr_in4_input); 679 device_create_file(&new_client->dev, &dev_attr_in0_min); 680 device_create_file(&new_client->dev, &dev_attr_in1_min); 681 device_create_file(&new_client->dev, &dev_attr_in2_min); 682 device_create_file(&new_client->dev, &dev_attr_in3_min); 683 device_create_file(&new_client->dev, &dev_attr_in4_min); 684 device_create_file(&new_client->dev, &dev_attr_in0_max); 685 device_create_file(&new_client->dev, &dev_attr_in1_max); 686 device_create_file(&new_client->dev, &dev_attr_in2_max); 687 device_create_file(&new_client->dev, &dev_attr_in3_max); 688 device_create_file(&new_client->dev, &dev_attr_in4_max); 689 device_create_file(&new_client->dev, &dev_attr_temp1_input); 690 device_create_file(&new_client->dev, &dev_attr_temp2_input); 691 device_create_file(&new_client->dev, &dev_attr_temp3_input); 692 device_create_file(&new_client->dev, &dev_attr_temp1_max); 693 device_create_file(&new_client->dev, &dev_attr_temp2_max); 694 device_create_file(&new_client->dev, &dev_attr_temp3_max); 695 device_create_file(&new_client->dev, &dev_attr_temp1_max_hyst); 696 device_create_file(&new_client->dev, &dev_attr_temp2_max_hyst); 697 device_create_file(&new_client->dev, &dev_attr_temp3_max_hyst); 698 device_create_file(&new_client->dev, &dev_attr_fan1_input); 699 device_create_file(&new_client->dev, &dev_attr_fan2_input); 700 device_create_file(&new_client->dev, &dev_attr_fan1_min); 701 device_create_file(&new_client->dev, &dev_attr_fan2_min); 702 device_create_file(&new_client->dev, &dev_attr_fan1_div); 703 device_create_file(&new_client->dev, &dev_attr_fan2_div); 704 device_create_file(&new_client->dev, &dev_attr_alarms); 705 706 return 0; 707 708 exit_detach: 709 i2c_detach_client(new_client); 710 exit_free: 711 kfree(data); 712 exit_release: 713 release_region(address, VIA686A_EXTENT); 714 return err; 715 } 716 717 static int via686a_detach_client(struct i2c_client *client) 718 { 719 struct via686a_data *data = i2c_get_clientdata(client); 720 int err; 721 722 hwmon_device_unregister(data->class_dev); 723 724 if ((err = i2c_detach_client(client))) { 725 dev_err(&client->dev, 726 "Client deregistration failed, client not detached.\n"); 727 return err; 728 } 729 730 release_region(client->addr, VIA686A_EXTENT); 731 kfree(data); 732 733 return 0; 734 } 735 736 /* Called when we have found a new VIA686A. Set limits, etc. */ 737 static void via686a_init_client(struct i2c_client *client) 738 { 739 u8 reg; 740 741 /* Start monitoring */ 742 reg = via686a_read_value(client, VIA686A_REG_CONFIG); 743 via686a_write_value(client, VIA686A_REG_CONFIG, (reg|0x01)&0x7F); 744 745 /* Configure temp interrupt mode for continuous-interrupt operation */ 746 via686a_write_value(client, VIA686A_REG_TEMP_MODE, 747 via686a_read_value(client, VIA686A_REG_TEMP_MODE) & 748 !(VIA686A_TEMP_MODE_MASK | VIA686A_TEMP_MODE_CONTINUOUS)); 749 } 750 751 static struct via686a_data *via686a_update_device(struct device *dev) 752 { 753 struct i2c_client *client = to_i2c_client(dev); 754 struct via686a_data *data = i2c_get_clientdata(client); 755 int i; 756 757 down(&data->update_lock); 758 759 if (time_after(jiffies, data->last_updated + HZ + HZ / 2) 760 || !data->valid) { 761 for (i = 0; i <= 4; i++) { 762 data->in[i] = 763 via686a_read_value(client, VIA686A_REG_IN(i)); 764 data->in_min[i] = via686a_read_value(client, 765 VIA686A_REG_IN_MIN 766 (i)); 767 data->in_max[i] = 768 via686a_read_value(client, VIA686A_REG_IN_MAX(i)); 769 } 770 for (i = 1; i <= 2; i++) { 771 data->fan[i - 1] = 772 via686a_read_value(client, VIA686A_REG_FAN(i)); 773 data->fan_min[i - 1] = via686a_read_value(client, 774 VIA686A_REG_FAN_MIN(i)); 775 } 776 for (i = 0; i <= 2; i++) { 777 data->temp[i] = via686a_read_value(client, 778 VIA686A_REG_TEMP[i]) << 2; 779 data->temp_over[i] = 780 via686a_read_value(client, 781 VIA686A_REG_TEMP_OVER[i]); 782 data->temp_hyst[i] = 783 via686a_read_value(client, 784 VIA686A_REG_TEMP_HYST[i]); 785 } 786 /* add in lower 2 bits 787 temp1 uses bits 7-6 of VIA686A_REG_TEMP_LOW1 788 temp2 uses bits 5-4 of VIA686A_REG_TEMP_LOW23 789 temp3 uses bits 7-6 of VIA686A_REG_TEMP_LOW23 790 */ 791 data->temp[0] |= (via686a_read_value(client, 792 VIA686A_REG_TEMP_LOW1) 793 & 0xc0) >> 6; 794 data->temp[1] |= 795 (via686a_read_value(client, VIA686A_REG_TEMP_LOW23) & 796 0x30) >> 4; 797 data->temp[2] |= 798 (via686a_read_value(client, VIA686A_REG_TEMP_LOW23) & 799 0xc0) >> 6; 800 801 i = via686a_read_value(client, VIA686A_REG_FANDIV); 802 data->fan_div[0] = (i >> 4) & 0x03; 803 data->fan_div[1] = i >> 6; 804 data->alarms = 805 via686a_read_value(client, 806 VIA686A_REG_ALARM1) | 807 (via686a_read_value(client, VIA686A_REG_ALARM2) << 8); 808 data->last_updated = jiffies; 809 data->valid = 1; 810 } 811 812 up(&data->update_lock); 813 814 return data; 815 } 816 817 static struct pci_device_id via686a_pci_ids[] = { 818 { PCI_DEVICE(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C686_4) }, 819 { 0, } 820 }; 821 822 MODULE_DEVICE_TABLE(pci, via686a_pci_ids); 823 824 static int __devinit via686a_pci_probe(struct pci_dev *dev, 825 const struct pci_device_id *id) 826 { 827 u16 val; 828 int addr = 0; 829 830 if (PCIBIOS_SUCCESSFUL != 831 pci_read_config_word(dev, VIA686A_BASE_REG, &val)) 832 return -ENODEV; 833 834 addr = val & ~(VIA686A_EXTENT - 1); 835 if (addr == 0 && force_addr == 0) { 836 dev_err(&dev->dev, "base address not set - upgrade BIOS " 837 "or use force_addr=0xaddr\n"); 838 return -ENODEV; 839 } 840 if (force_addr) 841 addr = force_addr; /* so detect will get called */ 842 843 if (!addr) { 844 dev_err(&dev->dev, "No Via 686A sensors found.\n"); 845 return -ENODEV; 846 } 847 normal_isa[0] = addr; 848 849 s_bridge = pci_dev_get(dev); 850 if (i2c_isa_add_driver(&via686a_driver)) { 851 pci_dev_put(s_bridge); 852 s_bridge = NULL; 853 } 854 855 /* Always return failure here. This is to allow other drivers to bind 856 * to this pci device. We don't really want to have control over the 857 * pci device, we only wanted to read as few register values from it. 858 */ 859 return -ENODEV; 860 } 861 862 static struct pci_driver via686a_pci_driver = { 863 .name = "via686a", 864 .id_table = via686a_pci_ids, 865 .probe = via686a_pci_probe, 866 }; 867 868 static int __init sm_via686a_init(void) 869 { 870 return pci_register_driver(&via686a_pci_driver); 871 } 872 873 static void __exit sm_via686a_exit(void) 874 { 875 pci_unregister_driver(&via686a_pci_driver); 876 if (s_bridge != NULL) { 877 i2c_isa_del_driver(&via686a_driver); 878 pci_dev_put(s_bridge); 879 s_bridge = NULL; 880 } 881 } 882 883 MODULE_AUTHOR("Ky�sti M�lkki <kmalkki@cc.hut.fi>, " 884 "Mark Studebaker <mdsxyz123@yahoo.com> " 885 "and Bob Dougherty <bobd@stanford.edu>"); 886 MODULE_DESCRIPTION("VIA 686A Sensor device"); 887 MODULE_LICENSE("GPL"); 888 889 module_init(sm_via686a_init); 890 module_exit(sm_via686a_exit); 891