1 /* 2 * lm87.c 3 * 4 * Copyright (C) 2000 Frodo Looijaard <frodol@dds.nl> 5 * Philip Edelbrock <phil@netroedge.com> 6 * Stephen Rousset <stephen.rousset@rocketlogix.com> 7 * Dan Eaton <dan.eaton@rocketlogix.com> 8 * Copyright (C) 2004 Jean Delvare <khali@linux-fr.org> 9 * 10 * Original port to Linux 2.6 by Jeff Oliver. 11 * 12 * The LM87 is a sensor chip made by National Semiconductor. It monitors up 13 * to 8 voltages (including its own power source), up to three temperatures 14 * (its own plus up to two external ones) and up to two fans. The default 15 * configuration is 6 voltages, two temperatures and two fans (see below). 16 * Voltages are scaled internally with ratios such that the nominal value of 17 * each voltage correspond to a register value of 192 (which means a 18 * resolution of about 0.5% of the nominal value). Temperature values are 19 * reported with a 1 deg resolution and a 3-4 deg accuracy. Complete 20 * datasheet can be obtained from National's website at: 21 * http://www.national.com/pf/LM/LM87.html 22 * 23 * Some functions share pins, so not all functions are available at the same 24 * time. Which are depends on the hardware setup. This driver assumes that 25 * the BIOS configured the chip correctly. In that respect, it differs from 26 * the original driver (from lm_sensors for Linux 2.4), which would force the 27 * LM87 to an arbitrary, compile-time chosen mode, regardless of the actual 28 * chipset wiring. 29 * For reference, here is the list of exclusive functions: 30 * - in0+in5 (default) or temp3 31 * - fan1 (default) or in6 32 * - fan2 (default) or in7 33 * - VID lines (default) or IRQ lines (not handled by this driver) 34 * 35 * The LM87 additionally features an analog output, supposedly usable to 36 * control the speed of a fan. All new chips use pulse width modulation 37 * instead. The LM87 is the only hardware monitoring chipset I know of 38 * which uses amplitude modulation. Be careful when using this feature. 39 * 40 * This program is free software; you can redistribute it and/or modify 41 * it under the terms of the GNU General Public License as published by 42 * the Free Software Foundation; either version 2 of the License, or 43 * (at your option) any later version. 44 * 45 * This program is distributed in the hope that it will be useful, 46 * but WITHOUT ANY WARRANTY; without even the implied warranty of 47 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 48 * GNU General Public License for more details. 49 * 50 * You should have received a copy of the GNU General Public License 51 * along with this program; if not, write to the Free Software 52 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 53 */ 54 55 #include <linux/module.h> 56 #include <linux/init.h> 57 #include <linux/slab.h> 58 #include <linux/jiffies.h> 59 #include <linux/i2c.h> 60 #include <linux/i2c-sensor.h> 61 #include <linux/i2c-vid.h> 62 63 /* 64 * Addresses to scan 65 * LM87 has three possible addresses: 0x2c, 0x2d and 0x2e. 66 */ 67 68 static unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, I2C_CLIENT_END }; 69 static unsigned int normal_isa[] = { I2C_CLIENT_ISA_END }; 70 71 /* 72 * Insmod parameters 73 */ 74 75 SENSORS_INSMOD_1(lm87); 76 77 /* 78 * The LM87 registers 79 */ 80 81 /* nr in 0..5 */ 82 #define LM87_REG_IN(nr) (0x20 + (nr)) 83 #define LM87_REG_IN_MAX(nr) (0x2B + (nr) * 2) 84 #define LM87_REG_IN_MIN(nr) (0x2C + (nr) * 2) 85 /* nr in 0..1 */ 86 #define LM87_REG_AIN(nr) (0x28 + (nr)) 87 #define LM87_REG_AIN_MIN(nr) (0x1A + (nr)) 88 #define LM87_REG_AIN_MAX(nr) (0x3B + (nr)) 89 90 static u8 LM87_REG_TEMP[3] = { 0x27, 0x26, 0x20 }; 91 static u8 LM87_REG_TEMP_HIGH[3] = { 0x39, 0x37, 0x2B }; 92 static u8 LM87_REG_TEMP_LOW[3] = { 0x3A, 0x38, 0x2C }; 93 94 #define LM87_REG_TEMP_HW_INT_LOCK 0x13 95 #define LM87_REG_TEMP_HW_EXT_LOCK 0x14 96 #define LM87_REG_TEMP_HW_INT 0x17 97 #define LM87_REG_TEMP_HW_EXT 0x18 98 99 /* nr in 0..1 */ 100 #define LM87_REG_FAN(nr) (0x28 + (nr)) 101 #define LM87_REG_FAN_MIN(nr) (0x3B + (nr)) 102 #define LM87_REG_AOUT 0x19 103 104 #define LM87_REG_CONFIG 0x40 105 #define LM87_REG_CHANNEL_MODE 0x16 106 #define LM87_REG_VID_FAN_DIV 0x47 107 #define LM87_REG_VID4 0x49 108 109 #define LM87_REG_ALARMS1 0x41 110 #define LM87_REG_ALARMS2 0x42 111 112 #define LM87_REG_COMPANY_ID 0x3E 113 #define LM87_REG_REVISION 0x3F 114 115 /* 116 * Conversions and various macros 117 * The LM87 uses signed 8-bit values for temperatures. 118 */ 119 120 #define IN_FROM_REG(reg,scale) (((reg) * (scale) + 96) / 192) 121 #define IN_TO_REG(val,scale) ((val) <= 0 ? 0 : \ 122 (val) * 192 >= (scale) * 255 ? 255 : \ 123 ((val) * 192 + (scale)/2) / (scale)) 124 125 #define TEMP_FROM_REG(reg) ((reg) * 1000) 126 #define TEMP_TO_REG(val) ((val) <= -127500 ? -128 : \ 127 (val) >= 126500 ? 127 : \ 128 (((val) < 0 ? (val)-500 : (val)+500) / 1000)) 129 130 #define FAN_FROM_REG(reg,div) ((reg) == 255 || (reg) == 0 ? 0 : \ 131 1350000 + (reg)*(div) / 2) / ((reg)*(div)) 132 #define FAN_TO_REG(val,div) ((val)*(div) * 255 <= 1350000 ? 255 : \ 133 (1350000 + (val)*(div) / 2) / ((val)*(div))) 134 135 #define FAN_DIV_FROM_REG(reg) (1 << (reg)) 136 137 /* analog out is 9.80mV/LSB */ 138 #define AOUT_FROM_REG(reg) (((reg) * 98 + 5) / 10) 139 #define AOUT_TO_REG(val) ((val) <= 0 ? 0 : \ 140 (val) >= 2500 ? 255 : \ 141 ((val) * 10 + 49) / 98) 142 143 /* nr in 0..1 */ 144 #define CHAN_NO_FAN(nr) (1 << (nr)) 145 #define CHAN_TEMP3 (1 << 2) 146 #define CHAN_VCC_5V (1 << 3) 147 #define CHAN_NO_VID (1 << 8) 148 149 /* 150 * Functions declaration 151 */ 152 153 static int lm87_attach_adapter(struct i2c_adapter *adapter); 154 static int lm87_detect(struct i2c_adapter *adapter, int address, int kind); 155 static void lm87_init_client(struct i2c_client *client); 156 static int lm87_detach_client(struct i2c_client *client); 157 static struct lm87_data *lm87_update_device(struct device *dev); 158 159 /* 160 * Driver data (common to all clients) 161 */ 162 163 static struct i2c_driver lm87_driver = { 164 .owner = THIS_MODULE, 165 .name = "lm87", 166 .id = I2C_DRIVERID_LM87, 167 .flags = I2C_DF_NOTIFY, 168 .attach_adapter = lm87_attach_adapter, 169 .detach_client = lm87_detach_client, 170 }; 171 172 /* 173 * Client data (each client gets its own) 174 */ 175 176 struct lm87_data { 177 struct i2c_client client; 178 struct semaphore update_lock; 179 char valid; /* zero until following fields are valid */ 180 unsigned long last_updated; /* In jiffies */ 181 182 u8 channel; /* register value */ 183 184 u8 in[8]; /* register value */ 185 u8 in_max[8]; /* register value */ 186 u8 in_min[8]; /* register value */ 187 u16 in_scale[8]; 188 189 s8 temp[3]; /* register value */ 190 s8 temp_high[3]; /* register value */ 191 s8 temp_low[3]; /* register value */ 192 s8 temp_crit_int; /* min of two register values */ 193 s8 temp_crit_ext; /* min of two register values */ 194 195 u8 fan[2]; /* register value */ 196 u8 fan_min[2]; /* register value */ 197 u8 fan_div[2]; /* register value, shifted right */ 198 u8 aout; /* register value */ 199 200 u16 alarms; /* register values, combined */ 201 u8 vid; /* register values, combined */ 202 u8 vrm; 203 }; 204 205 /* 206 * Sysfs stuff 207 */ 208 209 static inline int lm87_read_value(struct i2c_client *client, u8 reg) 210 { 211 return i2c_smbus_read_byte_data(client, reg); 212 } 213 214 static inline int lm87_write_value(struct i2c_client *client, u8 reg, u8 value) 215 { 216 return i2c_smbus_write_byte_data(client, reg, value); 217 } 218 219 #define show_in(offset) \ 220 static ssize_t show_in##offset##_input(struct device *dev, struct device_attribute *attr, char *buf) \ 221 { \ 222 struct lm87_data *data = lm87_update_device(dev); \ 223 return sprintf(buf, "%u\n", IN_FROM_REG(data->in[offset], \ 224 data->in_scale[offset])); \ 225 } \ 226 static ssize_t show_in##offset##_min(struct device *dev, struct device_attribute *attr, char *buf) \ 227 { \ 228 struct lm87_data *data = lm87_update_device(dev); \ 229 return sprintf(buf, "%u\n", IN_FROM_REG(data->in_min[offset], \ 230 data->in_scale[offset])); \ 231 } \ 232 static ssize_t show_in##offset##_max(struct device *dev, struct device_attribute *attr, char *buf) \ 233 { \ 234 struct lm87_data *data = lm87_update_device(dev); \ 235 return sprintf(buf, "%u\n", IN_FROM_REG(data->in_max[offset], \ 236 data->in_scale[offset])); \ 237 } \ 238 static DEVICE_ATTR(in##offset##_input, S_IRUGO, \ 239 show_in##offset##_input, NULL); 240 show_in(0); 241 show_in(1); 242 show_in(2); 243 show_in(3); 244 show_in(4); 245 show_in(5); 246 show_in(6); 247 show_in(7); 248 249 static void set_in_min(struct device *dev, const char *buf, int nr) 250 { 251 struct i2c_client *client = to_i2c_client(dev); 252 struct lm87_data *data = i2c_get_clientdata(client); 253 long val = simple_strtol(buf, NULL, 10); 254 255 down(&data->update_lock); 256 data->in_min[nr] = IN_TO_REG(val, data->in_scale[nr]); 257 lm87_write_value(client, nr<6 ? LM87_REG_IN_MIN(nr) : 258 LM87_REG_AIN_MIN(nr-6), data->in_min[nr]); 259 up(&data->update_lock); 260 } 261 262 static void set_in_max(struct device *dev, const char *buf, int nr) 263 { 264 struct i2c_client *client = to_i2c_client(dev); 265 struct lm87_data *data = i2c_get_clientdata(client); 266 long val = simple_strtol(buf, NULL, 10); 267 268 down(&data->update_lock); 269 data->in_max[nr] = IN_TO_REG(val, data->in_scale[nr]); 270 lm87_write_value(client, nr<6 ? LM87_REG_IN_MAX(nr) : 271 LM87_REG_AIN_MAX(nr-6), data->in_max[nr]); 272 up(&data->update_lock); 273 } 274 275 #define set_in(offset) \ 276 static ssize_t set_in##offset##_min(struct device *dev, struct device_attribute *attr, \ 277 const char *buf, size_t count) \ 278 { \ 279 set_in_min(dev, buf, offset); \ 280 return count; \ 281 } \ 282 static ssize_t set_in##offset##_max(struct device *dev, struct device_attribute *attr, \ 283 const char *buf, size_t count) \ 284 { \ 285 set_in_max(dev, buf, offset); \ 286 return count; \ 287 } \ 288 static DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \ 289 show_in##offset##_min, set_in##offset##_min); \ 290 static DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \ 291 show_in##offset##_max, set_in##offset##_max); 292 set_in(0); 293 set_in(1); 294 set_in(2); 295 set_in(3); 296 set_in(4); 297 set_in(5); 298 set_in(6); 299 set_in(7); 300 301 #define show_temp(offset) \ 302 static ssize_t show_temp##offset##_input(struct device *dev, struct device_attribute *attr, char *buf) \ 303 { \ 304 struct lm87_data *data = lm87_update_device(dev); \ 305 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[offset-1])); \ 306 } \ 307 static ssize_t show_temp##offset##_low(struct device *dev, struct device_attribute *attr, char *buf) \ 308 { \ 309 struct lm87_data *data = lm87_update_device(dev); \ 310 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_low[offset-1])); \ 311 } \ 312 static ssize_t show_temp##offset##_high(struct device *dev, struct device_attribute *attr, char *buf) \ 313 { \ 314 struct lm87_data *data = lm87_update_device(dev); \ 315 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_high[offset-1])); \ 316 }\ 317 static DEVICE_ATTR(temp##offset##_input, S_IRUGO, \ 318 show_temp##offset##_input, NULL); 319 show_temp(1); 320 show_temp(2); 321 show_temp(3); 322 323 static void set_temp_low(struct device *dev, const char *buf, int nr) 324 { 325 struct i2c_client *client = to_i2c_client(dev); 326 struct lm87_data *data = i2c_get_clientdata(client); 327 long val = simple_strtol(buf, NULL, 10); 328 329 down(&data->update_lock); 330 data->temp_low[nr] = TEMP_TO_REG(val); 331 lm87_write_value(client, LM87_REG_TEMP_LOW[nr], data->temp_low[nr]); 332 up(&data->update_lock); 333 } 334 335 static void set_temp_high(struct device *dev, const char *buf, int nr) 336 { 337 struct i2c_client *client = to_i2c_client(dev); 338 struct lm87_data *data = i2c_get_clientdata(client); 339 long val = simple_strtol(buf, NULL, 10); 340 341 down(&data->update_lock); 342 data->temp_high[nr] = TEMP_TO_REG(val); 343 lm87_write_value(client, LM87_REG_TEMP_HIGH[nr], data->temp_high[nr]); 344 up(&data->update_lock); 345 } 346 347 #define set_temp(offset) \ 348 static ssize_t set_temp##offset##_low(struct device *dev, struct device_attribute *attr, \ 349 const char *buf, size_t count) \ 350 { \ 351 set_temp_low(dev, buf, offset-1); \ 352 return count; \ 353 } \ 354 static ssize_t set_temp##offset##_high(struct device *dev, struct device_attribute *attr, \ 355 const char *buf, size_t count) \ 356 { \ 357 set_temp_high(dev, buf, offset-1); \ 358 return count; \ 359 } \ 360 static DEVICE_ATTR(temp##offset##_max, S_IRUGO | S_IWUSR, \ 361 show_temp##offset##_high, set_temp##offset##_high); \ 362 static DEVICE_ATTR(temp##offset##_min, S_IRUGO | S_IWUSR, \ 363 show_temp##offset##_low, set_temp##offset##_low); 364 set_temp(1); 365 set_temp(2); 366 set_temp(3); 367 368 static ssize_t show_temp_crit_int(struct device *dev, struct device_attribute *attr, char *buf) 369 { 370 struct lm87_data *data = lm87_update_device(dev); 371 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_crit_int)); 372 } 373 374 static ssize_t show_temp_crit_ext(struct device *dev, struct device_attribute *attr, char *buf) 375 { 376 struct lm87_data *data = lm87_update_device(dev); 377 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_crit_ext)); 378 } 379 380 static DEVICE_ATTR(temp1_crit, S_IRUGO, show_temp_crit_int, NULL); 381 static DEVICE_ATTR(temp2_crit, S_IRUGO, show_temp_crit_ext, NULL); 382 static DEVICE_ATTR(temp3_crit, S_IRUGO, show_temp_crit_ext, NULL); 383 384 #define show_fan(offset) \ 385 static ssize_t show_fan##offset##_input(struct device *dev, struct device_attribute *attr, char *buf) \ 386 { \ 387 struct lm87_data *data = lm87_update_device(dev); \ 388 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[offset-1], \ 389 FAN_DIV_FROM_REG(data->fan_div[offset-1]))); \ 390 } \ 391 static ssize_t show_fan##offset##_min(struct device *dev, struct device_attribute *attr, char *buf) \ 392 { \ 393 struct lm87_data *data = lm87_update_device(dev); \ 394 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[offset-1], \ 395 FAN_DIV_FROM_REG(data->fan_div[offset-1]))); \ 396 } \ 397 static ssize_t show_fan##offset##_div(struct device *dev, struct device_attribute *attr, char *buf) \ 398 { \ 399 struct lm87_data *data = lm87_update_device(dev); \ 400 return sprintf(buf, "%d\n", FAN_DIV_FROM_REG(data->fan_div[offset-1])); \ 401 } \ 402 static DEVICE_ATTR(fan##offset##_input, S_IRUGO, \ 403 show_fan##offset##_input, NULL); 404 show_fan(1); 405 show_fan(2); 406 407 static void set_fan_min(struct device *dev, const char *buf, int nr) 408 { 409 struct i2c_client *client = to_i2c_client(dev); 410 struct lm87_data *data = i2c_get_clientdata(client); 411 long val = simple_strtol(buf, NULL, 10); 412 413 down(&data->update_lock); 414 data->fan_min[nr] = FAN_TO_REG(val, 415 FAN_DIV_FROM_REG(data->fan_div[nr])); 416 lm87_write_value(client, LM87_REG_FAN_MIN(nr), data->fan_min[nr]); 417 up(&data->update_lock); 418 } 419 420 /* Note: we save and restore the fan minimum here, because its value is 421 determined in part by the fan clock divider. This follows the principle 422 of least suprise; the user doesn't expect the fan minimum to change just 423 because the divider changed. */ 424 static ssize_t set_fan_div(struct device *dev, const char *buf, 425 size_t count, int nr) 426 { 427 struct i2c_client *client = to_i2c_client(dev); 428 struct lm87_data *data = i2c_get_clientdata(client); 429 long val = simple_strtol(buf, NULL, 10); 430 unsigned long min; 431 u8 reg; 432 433 down(&data->update_lock); 434 min = FAN_FROM_REG(data->fan_min[nr], 435 FAN_DIV_FROM_REG(data->fan_div[nr])); 436 437 switch (val) { 438 case 1: data->fan_div[nr] = 0; break; 439 case 2: data->fan_div[nr] = 1; break; 440 case 4: data->fan_div[nr] = 2; break; 441 case 8: data->fan_div[nr] = 3; break; 442 default: 443 up(&data->update_lock); 444 return -EINVAL; 445 } 446 447 reg = lm87_read_value(client, LM87_REG_VID_FAN_DIV); 448 switch (nr) { 449 case 0: 450 reg = (reg & 0xCF) | (data->fan_div[0] << 4); 451 break; 452 case 1: 453 reg = (reg & 0x3F) | (data->fan_div[1] << 6); 454 break; 455 } 456 lm87_write_value(client, LM87_REG_VID_FAN_DIV, reg); 457 458 data->fan_min[nr] = FAN_TO_REG(min, val); 459 lm87_write_value(client, LM87_REG_FAN_MIN(nr), 460 data->fan_min[nr]); 461 up(&data->update_lock); 462 463 return count; 464 } 465 466 #define set_fan(offset) \ 467 static ssize_t set_fan##offset##_min(struct device *dev, struct device_attribute *attr, const char *buf, \ 468 size_t count) \ 469 { \ 470 set_fan_min(dev, buf, offset-1); \ 471 return count; \ 472 } \ 473 static ssize_t set_fan##offset##_div(struct device *dev, struct device_attribute *attr, const char *buf, \ 474 size_t count) \ 475 { \ 476 return set_fan_div(dev, buf, count, offset-1); \ 477 } \ 478 static DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \ 479 show_fan##offset##_min, set_fan##offset##_min); \ 480 static DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR, \ 481 show_fan##offset##_div, set_fan##offset##_div); 482 set_fan(1); 483 set_fan(2); 484 485 static ssize_t show_alarms(struct device *dev, struct device_attribute *attr, char *buf) 486 { 487 struct lm87_data *data = lm87_update_device(dev); 488 return sprintf(buf, "%d\n", data->alarms); 489 } 490 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL); 491 492 static ssize_t show_vid(struct device *dev, struct device_attribute *attr, char *buf) 493 { 494 struct lm87_data *data = lm87_update_device(dev); 495 return sprintf(buf, "%d\n", vid_from_reg(data->vid, data->vrm)); 496 } 497 static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid, NULL); 498 499 static ssize_t show_vrm(struct device *dev, struct device_attribute *attr, char *buf) 500 { 501 struct lm87_data *data = lm87_update_device(dev); 502 return sprintf(buf, "%d\n", data->vrm); 503 } 504 static ssize_t set_vrm(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) 505 { 506 struct i2c_client *client = to_i2c_client(dev); 507 struct lm87_data *data = i2c_get_clientdata(client); 508 data->vrm = simple_strtoul(buf, NULL, 10); 509 return count; 510 } 511 static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm, set_vrm); 512 513 static ssize_t show_aout(struct device *dev, struct device_attribute *attr, char *buf) 514 { 515 struct lm87_data *data = lm87_update_device(dev); 516 return sprintf(buf, "%d\n", AOUT_FROM_REG(data->aout)); 517 } 518 static ssize_t set_aout(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) 519 { 520 struct i2c_client *client = to_i2c_client(dev); 521 struct lm87_data *data = i2c_get_clientdata(client); 522 long val = simple_strtol(buf, NULL, 10); 523 524 down(&data->update_lock); 525 data->aout = AOUT_TO_REG(val); 526 lm87_write_value(client, LM87_REG_AOUT, data->aout); 527 up(&data->update_lock); 528 return count; 529 } 530 static DEVICE_ATTR(aout_output, S_IRUGO | S_IWUSR, show_aout, set_aout); 531 532 /* 533 * Real code 534 */ 535 536 static int lm87_attach_adapter(struct i2c_adapter *adapter) 537 { 538 if (!(adapter->class & I2C_CLASS_HWMON)) 539 return 0; 540 return i2c_detect(adapter, &addr_data, lm87_detect); 541 } 542 543 /* 544 * The following function does more than just detection. If detection 545 * succeeds, it also registers the new chip. 546 */ 547 static int lm87_detect(struct i2c_adapter *adapter, int address, int kind) 548 { 549 struct i2c_client *new_client; 550 struct lm87_data *data; 551 int err = 0; 552 553 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) 554 goto exit; 555 556 if (!(data = kmalloc(sizeof(struct lm87_data), GFP_KERNEL))) { 557 err = -ENOMEM; 558 goto exit; 559 } 560 memset(data, 0, sizeof(struct lm87_data)); 561 562 /* The common I2C client data is placed right before the 563 LM87-specific data. */ 564 new_client = &data->client; 565 i2c_set_clientdata(new_client, data); 566 new_client->addr = address; 567 new_client->adapter = adapter; 568 new_client->driver = &lm87_driver; 569 new_client->flags = 0; 570 571 /* Default to an LM87 if forced */ 572 if (kind == 0) 573 kind = lm87; 574 575 /* Now, we do the remaining detection. */ 576 if (kind < 0) { 577 u8 rev = lm87_read_value(new_client, LM87_REG_REVISION); 578 579 if (rev < 0x01 || rev > 0x08 580 || (lm87_read_value(new_client, LM87_REG_CONFIG) & 0x80) 581 || lm87_read_value(new_client, LM87_REG_COMPANY_ID) != 0x02) { 582 dev_dbg(&adapter->dev, 583 "LM87 detection failed at 0x%02x.\n", 584 address); 585 goto exit_free; 586 } 587 } 588 589 /* We can fill in the remaining client fields */ 590 strlcpy(new_client->name, "lm87", I2C_NAME_SIZE); 591 data->valid = 0; 592 init_MUTEX(&data->update_lock); 593 594 /* Tell the I2C layer a new client has arrived */ 595 if ((err = i2c_attach_client(new_client))) 596 goto exit_free; 597 598 /* Initialize the LM87 chip */ 599 lm87_init_client(new_client); 600 601 data->in_scale[0] = 2500; 602 data->in_scale[1] = 2700; 603 data->in_scale[2] = (data->channel & CHAN_VCC_5V) ? 5000 : 3300; 604 data->in_scale[3] = 5000; 605 data->in_scale[4] = 12000; 606 data->in_scale[5] = 2700; 607 data->in_scale[6] = 1875; 608 data->in_scale[7] = 1875; 609 610 /* Register sysfs hooks */ 611 device_create_file(&new_client->dev, &dev_attr_in1_input); 612 device_create_file(&new_client->dev, &dev_attr_in1_min); 613 device_create_file(&new_client->dev, &dev_attr_in1_max); 614 device_create_file(&new_client->dev, &dev_attr_in2_input); 615 device_create_file(&new_client->dev, &dev_attr_in2_min); 616 device_create_file(&new_client->dev, &dev_attr_in2_max); 617 device_create_file(&new_client->dev, &dev_attr_in3_input); 618 device_create_file(&new_client->dev, &dev_attr_in3_min); 619 device_create_file(&new_client->dev, &dev_attr_in3_max); 620 device_create_file(&new_client->dev, &dev_attr_in4_input); 621 device_create_file(&new_client->dev, &dev_attr_in4_min); 622 device_create_file(&new_client->dev, &dev_attr_in4_max); 623 624 if (data->channel & CHAN_NO_FAN(0)) { 625 device_create_file(&new_client->dev, &dev_attr_in6_input); 626 device_create_file(&new_client->dev, &dev_attr_in6_min); 627 device_create_file(&new_client->dev, &dev_attr_in6_max); 628 } else { 629 device_create_file(&new_client->dev, &dev_attr_fan1_input); 630 device_create_file(&new_client->dev, &dev_attr_fan1_min); 631 device_create_file(&new_client->dev, &dev_attr_fan1_div); 632 } 633 if (data->channel & CHAN_NO_FAN(1)) { 634 device_create_file(&new_client->dev, &dev_attr_in7_input); 635 device_create_file(&new_client->dev, &dev_attr_in7_min); 636 device_create_file(&new_client->dev, &dev_attr_in7_max); 637 } else { 638 device_create_file(&new_client->dev, &dev_attr_fan2_input); 639 device_create_file(&new_client->dev, &dev_attr_fan2_min); 640 device_create_file(&new_client->dev, &dev_attr_fan2_div); 641 } 642 643 device_create_file(&new_client->dev, &dev_attr_temp1_input); 644 device_create_file(&new_client->dev, &dev_attr_temp1_max); 645 device_create_file(&new_client->dev, &dev_attr_temp1_min); 646 device_create_file(&new_client->dev, &dev_attr_temp1_crit); 647 device_create_file(&new_client->dev, &dev_attr_temp2_input); 648 device_create_file(&new_client->dev, &dev_attr_temp2_max); 649 device_create_file(&new_client->dev, &dev_attr_temp2_min); 650 device_create_file(&new_client->dev, &dev_attr_temp2_crit); 651 652 if (data->channel & CHAN_TEMP3) { 653 device_create_file(&new_client->dev, &dev_attr_temp3_input); 654 device_create_file(&new_client->dev, &dev_attr_temp3_max); 655 device_create_file(&new_client->dev, &dev_attr_temp3_min); 656 device_create_file(&new_client->dev, &dev_attr_temp3_crit); 657 } else { 658 device_create_file(&new_client->dev, &dev_attr_in0_input); 659 device_create_file(&new_client->dev, &dev_attr_in0_min); 660 device_create_file(&new_client->dev, &dev_attr_in0_max); 661 device_create_file(&new_client->dev, &dev_attr_in5_input); 662 device_create_file(&new_client->dev, &dev_attr_in5_min); 663 device_create_file(&new_client->dev, &dev_attr_in5_max); 664 } 665 666 if (!(data->channel & CHAN_NO_VID)) { 667 device_create_file(&new_client->dev, &dev_attr_cpu0_vid); 668 device_create_file(&new_client->dev, &dev_attr_vrm); 669 } 670 671 device_create_file(&new_client->dev, &dev_attr_alarms); 672 device_create_file(&new_client->dev, &dev_attr_aout_output); 673 674 return 0; 675 676 exit_free: 677 kfree(data); 678 exit: 679 return err; 680 } 681 682 static void lm87_init_client(struct i2c_client *client) 683 { 684 struct lm87_data *data = i2c_get_clientdata(client); 685 u8 config; 686 687 data->channel = lm87_read_value(client, LM87_REG_CHANNEL_MODE); 688 data->vrm = i2c_which_vrm(); 689 690 config = lm87_read_value(client, LM87_REG_CONFIG); 691 if (!(config & 0x01)) { 692 int i; 693 694 /* Limits are left uninitialized after power-up */ 695 for (i = 1; i < 6; i++) { 696 lm87_write_value(client, LM87_REG_IN_MIN(i), 0x00); 697 lm87_write_value(client, LM87_REG_IN_MAX(i), 0xFF); 698 } 699 for (i = 0; i < 2; i++) { 700 lm87_write_value(client, LM87_REG_TEMP_HIGH[i], 0x7F); 701 lm87_write_value(client, LM87_REG_TEMP_LOW[i], 0x00); 702 lm87_write_value(client, LM87_REG_AIN_MIN(i), 0x00); 703 lm87_write_value(client, LM87_REG_AIN_MAX(i), 0xFF); 704 } 705 if (data->channel & CHAN_TEMP3) { 706 lm87_write_value(client, LM87_REG_TEMP_HIGH[2], 0x7F); 707 lm87_write_value(client, LM87_REG_TEMP_LOW[2], 0x00); 708 } else { 709 lm87_write_value(client, LM87_REG_IN_MIN(0), 0x00); 710 lm87_write_value(client, LM87_REG_IN_MAX(0), 0xFF); 711 } 712 } 713 if ((config & 0x81) != 0x01) { 714 /* Start monitoring */ 715 lm87_write_value(client, LM87_REG_CONFIG, 716 (config & 0xF7) | 0x01); 717 } 718 } 719 720 static int lm87_detach_client(struct i2c_client *client) 721 { 722 int err; 723 724 if ((err = i2c_detach_client(client))) { 725 dev_err(&client->dev, "Client deregistration failed, " 726 "client not detached.\n"); 727 return err; 728 } 729 730 kfree(i2c_get_clientdata(client)); 731 return 0; 732 } 733 734 static struct lm87_data *lm87_update_device(struct device *dev) 735 { 736 struct i2c_client *client = to_i2c_client(dev); 737 struct lm87_data *data = i2c_get_clientdata(client); 738 739 down(&data->update_lock); 740 741 if (time_after(jiffies, data->last_updated + HZ) || !data->valid) { 742 int i, j; 743 744 dev_dbg(&client->dev, "Updating data.\n"); 745 746 i = (data->channel & CHAN_TEMP3) ? 1 : 0; 747 j = (data->channel & CHAN_TEMP3) ? 5 : 6; 748 for (; i < j; i++) { 749 data->in[i] = lm87_read_value(client, 750 LM87_REG_IN(i)); 751 data->in_min[i] = lm87_read_value(client, 752 LM87_REG_IN_MIN(i)); 753 data->in_max[i] = lm87_read_value(client, 754 LM87_REG_IN_MAX(i)); 755 } 756 757 for (i = 0; i < 2; i++) { 758 if (data->channel & CHAN_NO_FAN(i)) { 759 data->in[6+i] = lm87_read_value(client, 760 LM87_REG_AIN(i)); 761 data->in_max[6+i] = lm87_read_value(client, 762 LM87_REG_AIN_MAX(i)); 763 data->in_min[6+i] = lm87_read_value(client, 764 LM87_REG_AIN_MIN(i)); 765 766 } else { 767 data->fan[i] = lm87_read_value(client, 768 LM87_REG_FAN(i)); 769 data->fan_min[i] = lm87_read_value(client, 770 LM87_REG_FAN_MIN(i)); 771 } 772 } 773 774 j = (data->channel & CHAN_TEMP3) ? 3 : 2; 775 for (i = 0 ; i < j; i++) { 776 data->temp[i] = lm87_read_value(client, 777 LM87_REG_TEMP[i]); 778 data->temp_high[i] = lm87_read_value(client, 779 LM87_REG_TEMP_HIGH[i]); 780 data->temp_low[i] = lm87_read_value(client, 781 LM87_REG_TEMP_LOW[i]); 782 } 783 784 i = lm87_read_value(client, LM87_REG_TEMP_HW_INT_LOCK); 785 j = lm87_read_value(client, LM87_REG_TEMP_HW_INT); 786 data->temp_crit_int = min(i, j); 787 788 i = lm87_read_value(client, LM87_REG_TEMP_HW_EXT_LOCK); 789 j = lm87_read_value(client, LM87_REG_TEMP_HW_EXT); 790 data->temp_crit_ext = min(i, j); 791 792 i = lm87_read_value(client, LM87_REG_VID_FAN_DIV); 793 data->fan_div[0] = (i >> 4) & 0x03; 794 data->fan_div[1] = (i >> 6) & 0x03; 795 data->vid = (i & 0x0F) 796 | (lm87_read_value(client, LM87_REG_VID4) & 0x01) 797 << 4; 798 799 data->alarms = lm87_read_value(client, LM87_REG_ALARMS1) 800 | (lm87_read_value(client, LM87_REG_ALARMS2) 801 << 8); 802 data->aout = lm87_read_value(client, LM87_REG_AOUT); 803 804 data->last_updated = jiffies; 805 data->valid = 1; 806 } 807 808 up(&data->update_lock); 809 810 return data; 811 } 812 813 static int __init sensors_lm87_init(void) 814 { 815 return i2c_add_driver(&lm87_driver); 816 } 817 818 static void __exit sensors_lm87_exit(void) 819 { 820 i2c_del_driver(&lm87_driver); 821 } 822 823 MODULE_AUTHOR("Jean Delvare <khali@linux-fr.org> and others"); 824 MODULE_DESCRIPTION("LM87 driver"); 825 MODULE_LICENSE("GPL"); 826 827 module_init(sensors_lm87_init); 828 module_exit(sensors_lm87_exit); 829