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/hwmon.h> 61 #include <linux/hwmon-vid.h> 62 #include <linux/err.h> 63 #include <linux/mutex.h> 64 65 /* 66 * Addresses to scan 67 * LM87 has three possible addresses: 0x2c, 0x2d and 0x2e. 68 */ 69 70 static unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, I2C_CLIENT_END }; 71 72 /* 73 * Insmod parameters 74 */ 75 76 I2C_CLIENT_INSMOD_1(lm87); 77 78 /* 79 * The LM87 registers 80 */ 81 82 /* nr in 0..5 */ 83 #define LM87_REG_IN(nr) (0x20 + (nr)) 84 #define LM87_REG_IN_MAX(nr) (0x2B + (nr) * 2) 85 #define LM87_REG_IN_MIN(nr) (0x2C + (nr) * 2) 86 /* nr in 0..1 */ 87 #define LM87_REG_AIN(nr) (0x28 + (nr)) 88 #define LM87_REG_AIN_MIN(nr) (0x1A + (nr)) 89 #define LM87_REG_AIN_MAX(nr) (0x3B + (nr)) 90 91 static u8 LM87_REG_TEMP[3] = { 0x27, 0x26, 0x20 }; 92 static u8 LM87_REG_TEMP_HIGH[3] = { 0x39, 0x37, 0x2B }; 93 static u8 LM87_REG_TEMP_LOW[3] = { 0x3A, 0x38, 0x2C }; 94 95 #define LM87_REG_TEMP_HW_INT_LOCK 0x13 96 #define LM87_REG_TEMP_HW_EXT_LOCK 0x14 97 #define LM87_REG_TEMP_HW_INT 0x17 98 #define LM87_REG_TEMP_HW_EXT 0x18 99 100 /* nr in 0..1 */ 101 #define LM87_REG_FAN(nr) (0x28 + (nr)) 102 #define LM87_REG_FAN_MIN(nr) (0x3B + (nr)) 103 #define LM87_REG_AOUT 0x19 104 105 #define LM87_REG_CONFIG 0x40 106 #define LM87_REG_CHANNEL_MODE 0x16 107 #define LM87_REG_VID_FAN_DIV 0x47 108 #define LM87_REG_VID4 0x49 109 110 #define LM87_REG_ALARMS1 0x41 111 #define LM87_REG_ALARMS2 0x42 112 113 #define LM87_REG_COMPANY_ID 0x3E 114 #define LM87_REG_REVISION 0x3F 115 116 /* 117 * Conversions and various macros 118 * The LM87 uses signed 8-bit values for temperatures. 119 */ 120 121 #define IN_FROM_REG(reg,scale) (((reg) * (scale) + 96) / 192) 122 #define IN_TO_REG(val,scale) ((val) <= 0 ? 0 : \ 123 (val) * 192 >= (scale) * 255 ? 255 : \ 124 ((val) * 192 + (scale)/2) / (scale)) 125 126 #define TEMP_FROM_REG(reg) ((reg) * 1000) 127 #define TEMP_TO_REG(val) ((val) <= -127500 ? -128 : \ 128 (val) >= 126500 ? 127 : \ 129 (((val) < 0 ? (val)-500 : (val)+500) / 1000)) 130 131 #define FAN_FROM_REG(reg,div) ((reg) == 255 || (reg) == 0 ? 0 : \ 132 1350000 + (reg)*(div) / 2) / ((reg)*(div)) 133 #define FAN_TO_REG(val,div) ((val)*(div) * 255 <= 1350000 ? 255 : \ 134 (1350000 + (val)*(div) / 2) / ((val)*(div))) 135 136 #define FAN_DIV_FROM_REG(reg) (1 << (reg)) 137 138 /* analog out is 9.80mV/LSB */ 139 #define AOUT_FROM_REG(reg) (((reg) * 98 + 5) / 10) 140 #define AOUT_TO_REG(val) ((val) <= 0 ? 0 : \ 141 (val) >= 2500 ? 255 : \ 142 ((val) * 10 + 49) / 98) 143 144 /* nr in 0..1 */ 145 #define CHAN_NO_FAN(nr) (1 << (nr)) 146 #define CHAN_TEMP3 (1 << 2) 147 #define CHAN_VCC_5V (1 << 3) 148 #define CHAN_NO_VID (1 << 8) 149 150 /* 151 * Functions declaration 152 */ 153 154 static int lm87_attach_adapter(struct i2c_adapter *adapter); 155 static int lm87_detect(struct i2c_adapter *adapter, int address, int kind); 156 static void lm87_init_client(struct i2c_client *client); 157 static int lm87_detach_client(struct i2c_client *client); 158 static struct lm87_data *lm87_update_device(struct device *dev); 159 160 /* 161 * Driver data (common to all clients) 162 */ 163 164 static struct i2c_driver lm87_driver = { 165 .driver = { 166 .name = "lm87", 167 }, 168 .id = I2C_DRIVERID_LM87, 169 .attach_adapter = lm87_attach_adapter, 170 .detach_client = lm87_detach_client, 171 }; 172 173 /* 174 * Client data (each client gets its own) 175 */ 176 177 struct lm87_data { 178 struct i2c_client client; 179 struct class_device *class_dev; 180 struct mutex update_lock; 181 char valid; /* zero until following fields are valid */ 182 unsigned long last_updated; /* In jiffies */ 183 184 u8 channel; /* register value */ 185 186 u8 in[8]; /* register value */ 187 u8 in_max[8]; /* register value */ 188 u8 in_min[8]; /* register value */ 189 u16 in_scale[8]; 190 191 s8 temp[3]; /* register value */ 192 s8 temp_high[3]; /* register value */ 193 s8 temp_low[3]; /* register value */ 194 s8 temp_crit_int; /* min of two register values */ 195 s8 temp_crit_ext; /* min of two register values */ 196 197 u8 fan[2]; /* register value */ 198 u8 fan_min[2]; /* register value */ 199 u8 fan_div[2]; /* register value, shifted right */ 200 u8 aout; /* register value */ 201 202 u16 alarms; /* register values, combined */ 203 u8 vid; /* register values, combined */ 204 u8 vrm; 205 }; 206 207 /* 208 * Sysfs stuff 209 */ 210 211 static inline int lm87_read_value(struct i2c_client *client, u8 reg) 212 { 213 return i2c_smbus_read_byte_data(client, reg); 214 } 215 216 static inline int lm87_write_value(struct i2c_client *client, u8 reg, u8 value) 217 { 218 return i2c_smbus_write_byte_data(client, reg, value); 219 } 220 221 #define show_in(offset) \ 222 static ssize_t show_in##offset##_input(struct device *dev, struct device_attribute *attr, char *buf) \ 223 { \ 224 struct lm87_data *data = lm87_update_device(dev); \ 225 return sprintf(buf, "%u\n", IN_FROM_REG(data->in[offset], \ 226 data->in_scale[offset])); \ 227 } \ 228 static ssize_t show_in##offset##_min(struct device *dev, struct device_attribute *attr, char *buf) \ 229 { \ 230 struct lm87_data *data = lm87_update_device(dev); \ 231 return sprintf(buf, "%u\n", IN_FROM_REG(data->in_min[offset], \ 232 data->in_scale[offset])); \ 233 } \ 234 static ssize_t show_in##offset##_max(struct device *dev, struct device_attribute *attr, char *buf) \ 235 { \ 236 struct lm87_data *data = lm87_update_device(dev); \ 237 return sprintf(buf, "%u\n", IN_FROM_REG(data->in_max[offset], \ 238 data->in_scale[offset])); \ 239 } \ 240 static DEVICE_ATTR(in##offset##_input, S_IRUGO, \ 241 show_in##offset##_input, NULL); 242 show_in(0); 243 show_in(1); 244 show_in(2); 245 show_in(3); 246 show_in(4); 247 show_in(5); 248 show_in(6); 249 show_in(7); 250 251 static void set_in_min(struct device *dev, const char *buf, int nr) 252 { 253 struct i2c_client *client = to_i2c_client(dev); 254 struct lm87_data *data = i2c_get_clientdata(client); 255 long val = simple_strtol(buf, NULL, 10); 256 257 mutex_lock(&data->update_lock); 258 data->in_min[nr] = IN_TO_REG(val, data->in_scale[nr]); 259 lm87_write_value(client, nr<6 ? LM87_REG_IN_MIN(nr) : 260 LM87_REG_AIN_MIN(nr-6), data->in_min[nr]); 261 mutex_unlock(&data->update_lock); 262 } 263 264 static void set_in_max(struct device *dev, const char *buf, int nr) 265 { 266 struct i2c_client *client = to_i2c_client(dev); 267 struct lm87_data *data = i2c_get_clientdata(client); 268 long val = simple_strtol(buf, NULL, 10); 269 270 mutex_lock(&data->update_lock); 271 data->in_max[nr] = IN_TO_REG(val, data->in_scale[nr]); 272 lm87_write_value(client, nr<6 ? LM87_REG_IN_MAX(nr) : 273 LM87_REG_AIN_MAX(nr-6), data->in_max[nr]); 274 mutex_unlock(&data->update_lock); 275 } 276 277 #define set_in(offset) \ 278 static ssize_t set_in##offset##_min(struct device *dev, struct device_attribute *attr, \ 279 const char *buf, size_t count) \ 280 { \ 281 set_in_min(dev, buf, offset); \ 282 return count; \ 283 } \ 284 static ssize_t set_in##offset##_max(struct device *dev, struct device_attribute *attr, \ 285 const char *buf, size_t count) \ 286 { \ 287 set_in_max(dev, buf, offset); \ 288 return count; \ 289 } \ 290 static DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \ 291 show_in##offset##_min, set_in##offset##_min); \ 292 static DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \ 293 show_in##offset##_max, set_in##offset##_max); 294 set_in(0); 295 set_in(1); 296 set_in(2); 297 set_in(3); 298 set_in(4); 299 set_in(5); 300 set_in(6); 301 set_in(7); 302 303 #define show_temp(offset) \ 304 static ssize_t show_temp##offset##_input(struct device *dev, struct device_attribute *attr, char *buf) \ 305 { \ 306 struct lm87_data *data = lm87_update_device(dev); \ 307 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[offset-1])); \ 308 } \ 309 static ssize_t show_temp##offset##_low(struct device *dev, struct device_attribute *attr, char *buf) \ 310 { \ 311 struct lm87_data *data = lm87_update_device(dev); \ 312 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_low[offset-1])); \ 313 } \ 314 static ssize_t show_temp##offset##_high(struct device *dev, struct device_attribute *attr, char *buf) \ 315 { \ 316 struct lm87_data *data = lm87_update_device(dev); \ 317 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_high[offset-1])); \ 318 }\ 319 static DEVICE_ATTR(temp##offset##_input, S_IRUGO, \ 320 show_temp##offset##_input, NULL); 321 show_temp(1); 322 show_temp(2); 323 show_temp(3); 324 325 static void set_temp_low(struct device *dev, const char *buf, int nr) 326 { 327 struct i2c_client *client = to_i2c_client(dev); 328 struct lm87_data *data = i2c_get_clientdata(client); 329 long val = simple_strtol(buf, NULL, 10); 330 331 mutex_lock(&data->update_lock); 332 data->temp_low[nr] = TEMP_TO_REG(val); 333 lm87_write_value(client, LM87_REG_TEMP_LOW[nr], data->temp_low[nr]); 334 mutex_unlock(&data->update_lock); 335 } 336 337 static void set_temp_high(struct device *dev, const char *buf, int nr) 338 { 339 struct i2c_client *client = to_i2c_client(dev); 340 struct lm87_data *data = i2c_get_clientdata(client); 341 long val = simple_strtol(buf, NULL, 10); 342 343 mutex_lock(&data->update_lock); 344 data->temp_high[nr] = TEMP_TO_REG(val); 345 lm87_write_value(client, LM87_REG_TEMP_HIGH[nr], data->temp_high[nr]); 346 mutex_unlock(&data->update_lock); 347 } 348 349 #define set_temp(offset) \ 350 static ssize_t set_temp##offset##_low(struct device *dev, struct device_attribute *attr, \ 351 const char *buf, size_t count) \ 352 { \ 353 set_temp_low(dev, buf, offset-1); \ 354 return count; \ 355 } \ 356 static ssize_t set_temp##offset##_high(struct device *dev, struct device_attribute *attr, \ 357 const char *buf, size_t count) \ 358 { \ 359 set_temp_high(dev, buf, offset-1); \ 360 return count; \ 361 } \ 362 static DEVICE_ATTR(temp##offset##_max, S_IRUGO | S_IWUSR, \ 363 show_temp##offset##_high, set_temp##offset##_high); \ 364 static DEVICE_ATTR(temp##offset##_min, S_IRUGO | S_IWUSR, \ 365 show_temp##offset##_low, set_temp##offset##_low); 366 set_temp(1); 367 set_temp(2); 368 set_temp(3); 369 370 static ssize_t show_temp_crit_int(struct device *dev, struct device_attribute *attr, char *buf) 371 { 372 struct lm87_data *data = lm87_update_device(dev); 373 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_crit_int)); 374 } 375 376 static ssize_t show_temp_crit_ext(struct device *dev, struct device_attribute *attr, char *buf) 377 { 378 struct lm87_data *data = lm87_update_device(dev); 379 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_crit_ext)); 380 } 381 382 static DEVICE_ATTR(temp1_crit, S_IRUGO, show_temp_crit_int, NULL); 383 static DEVICE_ATTR(temp2_crit, S_IRUGO, show_temp_crit_ext, NULL); 384 static DEVICE_ATTR(temp3_crit, S_IRUGO, show_temp_crit_ext, NULL); 385 386 #define show_fan(offset) \ 387 static ssize_t show_fan##offset##_input(struct device *dev, struct device_attribute *attr, char *buf) \ 388 { \ 389 struct lm87_data *data = lm87_update_device(dev); \ 390 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[offset-1], \ 391 FAN_DIV_FROM_REG(data->fan_div[offset-1]))); \ 392 } \ 393 static ssize_t show_fan##offset##_min(struct device *dev, struct device_attribute *attr, char *buf) \ 394 { \ 395 struct lm87_data *data = lm87_update_device(dev); \ 396 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[offset-1], \ 397 FAN_DIV_FROM_REG(data->fan_div[offset-1]))); \ 398 } \ 399 static ssize_t show_fan##offset##_div(struct device *dev, struct device_attribute *attr, char *buf) \ 400 { \ 401 struct lm87_data *data = lm87_update_device(dev); \ 402 return sprintf(buf, "%d\n", FAN_DIV_FROM_REG(data->fan_div[offset-1])); \ 403 } \ 404 static DEVICE_ATTR(fan##offset##_input, S_IRUGO, \ 405 show_fan##offset##_input, NULL); 406 show_fan(1); 407 show_fan(2); 408 409 static void set_fan_min(struct device *dev, const char *buf, int nr) 410 { 411 struct i2c_client *client = to_i2c_client(dev); 412 struct lm87_data *data = i2c_get_clientdata(client); 413 long val = simple_strtol(buf, NULL, 10); 414 415 mutex_lock(&data->update_lock); 416 data->fan_min[nr] = FAN_TO_REG(val, 417 FAN_DIV_FROM_REG(data->fan_div[nr])); 418 lm87_write_value(client, LM87_REG_FAN_MIN(nr), data->fan_min[nr]); 419 mutex_unlock(&data->update_lock); 420 } 421 422 /* Note: we save and restore the fan minimum here, because its value is 423 determined in part by the fan clock divider. This follows the principle 424 of least suprise; the user doesn't expect the fan minimum to change just 425 because the divider changed. */ 426 static ssize_t set_fan_div(struct device *dev, const char *buf, 427 size_t count, int nr) 428 { 429 struct i2c_client *client = to_i2c_client(dev); 430 struct lm87_data *data = i2c_get_clientdata(client); 431 long val = simple_strtol(buf, NULL, 10); 432 unsigned long min; 433 u8 reg; 434 435 mutex_lock(&data->update_lock); 436 min = FAN_FROM_REG(data->fan_min[nr], 437 FAN_DIV_FROM_REG(data->fan_div[nr])); 438 439 switch (val) { 440 case 1: data->fan_div[nr] = 0; break; 441 case 2: data->fan_div[nr] = 1; break; 442 case 4: data->fan_div[nr] = 2; break; 443 case 8: data->fan_div[nr] = 3; break; 444 default: 445 mutex_unlock(&data->update_lock); 446 return -EINVAL; 447 } 448 449 reg = lm87_read_value(client, LM87_REG_VID_FAN_DIV); 450 switch (nr) { 451 case 0: 452 reg = (reg & 0xCF) | (data->fan_div[0] << 4); 453 break; 454 case 1: 455 reg = (reg & 0x3F) | (data->fan_div[1] << 6); 456 break; 457 } 458 lm87_write_value(client, LM87_REG_VID_FAN_DIV, reg); 459 460 data->fan_min[nr] = FAN_TO_REG(min, val); 461 lm87_write_value(client, LM87_REG_FAN_MIN(nr), 462 data->fan_min[nr]); 463 mutex_unlock(&data->update_lock); 464 465 return count; 466 } 467 468 #define set_fan(offset) \ 469 static ssize_t set_fan##offset##_min(struct device *dev, struct device_attribute *attr, const char *buf, \ 470 size_t count) \ 471 { \ 472 set_fan_min(dev, buf, offset-1); \ 473 return count; \ 474 } \ 475 static ssize_t set_fan##offset##_div(struct device *dev, struct device_attribute *attr, const char *buf, \ 476 size_t count) \ 477 { \ 478 return set_fan_div(dev, buf, count, offset-1); \ 479 } \ 480 static DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \ 481 show_fan##offset##_min, set_fan##offset##_min); \ 482 static DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR, \ 483 show_fan##offset##_div, set_fan##offset##_div); 484 set_fan(1); 485 set_fan(2); 486 487 static ssize_t show_alarms(struct device *dev, struct device_attribute *attr, char *buf) 488 { 489 struct lm87_data *data = lm87_update_device(dev); 490 return sprintf(buf, "%d\n", data->alarms); 491 } 492 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL); 493 494 static ssize_t show_vid(struct device *dev, struct device_attribute *attr, char *buf) 495 { 496 struct lm87_data *data = lm87_update_device(dev); 497 return sprintf(buf, "%d\n", vid_from_reg(data->vid, data->vrm)); 498 } 499 static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid, NULL); 500 501 static ssize_t show_vrm(struct device *dev, struct device_attribute *attr, char *buf) 502 { 503 struct lm87_data *data = lm87_update_device(dev); 504 return sprintf(buf, "%d\n", data->vrm); 505 } 506 static ssize_t set_vrm(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) 507 { 508 struct i2c_client *client = to_i2c_client(dev); 509 struct lm87_data *data = i2c_get_clientdata(client); 510 data->vrm = simple_strtoul(buf, NULL, 10); 511 return count; 512 } 513 static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm, set_vrm); 514 515 static ssize_t show_aout(struct device *dev, struct device_attribute *attr, char *buf) 516 { 517 struct lm87_data *data = lm87_update_device(dev); 518 return sprintf(buf, "%d\n", AOUT_FROM_REG(data->aout)); 519 } 520 static ssize_t set_aout(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) 521 { 522 struct i2c_client *client = to_i2c_client(dev); 523 struct lm87_data *data = i2c_get_clientdata(client); 524 long val = simple_strtol(buf, NULL, 10); 525 526 mutex_lock(&data->update_lock); 527 data->aout = AOUT_TO_REG(val); 528 lm87_write_value(client, LM87_REG_AOUT, data->aout); 529 mutex_unlock(&data->update_lock); 530 return count; 531 } 532 static DEVICE_ATTR(aout_output, S_IRUGO | S_IWUSR, show_aout, set_aout); 533 534 /* 535 * Real code 536 */ 537 538 static int lm87_attach_adapter(struct i2c_adapter *adapter) 539 { 540 if (!(adapter->class & I2C_CLASS_HWMON)) 541 return 0; 542 return i2c_probe(adapter, &addr_data, lm87_detect); 543 } 544 545 /* 546 * The following function does more than just detection. If detection 547 * succeeds, it also registers the new chip. 548 */ 549 static int lm87_detect(struct i2c_adapter *adapter, int address, int kind) 550 { 551 struct i2c_client *new_client; 552 struct lm87_data *data; 553 int err = 0; 554 555 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) 556 goto exit; 557 558 if (!(data = kzalloc(sizeof(struct lm87_data), GFP_KERNEL))) { 559 err = -ENOMEM; 560 goto exit; 561 } 562 563 /* The common I2C client data is placed right before the 564 LM87-specific data. */ 565 new_client = &data->client; 566 i2c_set_clientdata(new_client, data); 567 new_client->addr = address; 568 new_client->adapter = adapter; 569 new_client->driver = &lm87_driver; 570 new_client->flags = 0; 571 572 /* Default to an LM87 if forced */ 573 if (kind == 0) 574 kind = lm87; 575 576 /* Now, we do the remaining detection. */ 577 if (kind < 0) { 578 u8 rev = lm87_read_value(new_client, LM87_REG_REVISION); 579 580 if (rev < 0x01 || rev > 0x08 581 || (lm87_read_value(new_client, LM87_REG_CONFIG) & 0x80) 582 || lm87_read_value(new_client, LM87_REG_COMPANY_ID) != 0x02) { 583 dev_dbg(&adapter->dev, 584 "LM87 detection failed at 0x%02x.\n", 585 address); 586 goto exit_free; 587 } 588 } 589 590 /* We can fill in the remaining client fields */ 591 strlcpy(new_client->name, "lm87", I2C_NAME_SIZE); 592 data->valid = 0; 593 mutex_init(&data->update_lock); 594 595 /* Tell the I2C layer a new client has arrived */ 596 if ((err = i2c_attach_client(new_client))) 597 goto exit_free; 598 599 /* Initialize the LM87 chip */ 600 lm87_init_client(new_client); 601 602 data->in_scale[0] = 2500; 603 data->in_scale[1] = 2700; 604 data->in_scale[2] = (data->channel & CHAN_VCC_5V) ? 5000 : 3300; 605 data->in_scale[3] = 5000; 606 data->in_scale[4] = 12000; 607 data->in_scale[5] = 2700; 608 data->in_scale[6] = 1875; 609 data->in_scale[7] = 1875; 610 611 /* Register sysfs hooks */ 612 data->class_dev = hwmon_device_register(&new_client->dev); 613 if (IS_ERR(data->class_dev)) { 614 err = PTR_ERR(data->class_dev); 615 goto exit_detach; 616 } 617 618 device_create_file(&new_client->dev, &dev_attr_in1_input); 619 device_create_file(&new_client->dev, &dev_attr_in1_min); 620 device_create_file(&new_client->dev, &dev_attr_in1_max); 621 device_create_file(&new_client->dev, &dev_attr_in2_input); 622 device_create_file(&new_client->dev, &dev_attr_in2_min); 623 device_create_file(&new_client->dev, &dev_attr_in2_max); 624 device_create_file(&new_client->dev, &dev_attr_in3_input); 625 device_create_file(&new_client->dev, &dev_attr_in3_min); 626 device_create_file(&new_client->dev, &dev_attr_in3_max); 627 device_create_file(&new_client->dev, &dev_attr_in4_input); 628 device_create_file(&new_client->dev, &dev_attr_in4_min); 629 device_create_file(&new_client->dev, &dev_attr_in4_max); 630 631 if (data->channel & CHAN_NO_FAN(0)) { 632 device_create_file(&new_client->dev, &dev_attr_in6_input); 633 device_create_file(&new_client->dev, &dev_attr_in6_min); 634 device_create_file(&new_client->dev, &dev_attr_in6_max); 635 } else { 636 device_create_file(&new_client->dev, &dev_attr_fan1_input); 637 device_create_file(&new_client->dev, &dev_attr_fan1_min); 638 device_create_file(&new_client->dev, &dev_attr_fan1_div); 639 } 640 if (data->channel & CHAN_NO_FAN(1)) { 641 device_create_file(&new_client->dev, &dev_attr_in7_input); 642 device_create_file(&new_client->dev, &dev_attr_in7_min); 643 device_create_file(&new_client->dev, &dev_attr_in7_max); 644 } else { 645 device_create_file(&new_client->dev, &dev_attr_fan2_input); 646 device_create_file(&new_client->dev, &dev_attr_fan2_min); 647 device_create_file(&new_client->dev, &dev_attr_fan2_div); 648 } 649 650 device_create_file(&new_client->dev, &dev_attr_temp1_input); 651 device_create_file(&new_client->dev, &dev_attr_temp1_max); 652 device_create_file(&new_client->dev, &dev_attr_temp1_min); 653 device_create_file(&new_client->dev, &dev_attr_temp1_crit); 654 device_create_file(&new_client->dev, &dev_attr_temp2_input); 655 device_create_file(&new_client->dev, &dev_attr_temp2_max); 656 device_create_file(&new_client->dev, &dev_attr_temp2_min); 657 device_create_file(&new_client->dev, &dev_attr_temp2_crit); 658 659 if (data->channel & CHAN_TEMP3) { 660 device_create_file(&new_client->dev, &dev_attr_temp3_input); 661 device_create_file(&new_client->dev, &dev_attr_temp3_max); 662 device_create_file(&new_client->dev, &dev_attr_temp3_min); 663 device_create_file(&new_client->dev, &dev_attr_temp3_crit); 664 } else { 665 device_create_file(&new_client->dev, &dev_attr_in0_input); 666 device_create_file(&new_client->dev, &dev_attr_in0_min); 667 device_create_file(&new_client->dev, &dev_attr_in0_max); 668 device_create_file(&new_client->dev, &dev_attr_in5_input); 669 device_create_file(&new_client->dev, &dev_attr_in5_min); 670 device_create_file(&new_client->dev, &dev_attr_in5_max); 671 } 672 673 if (!(data->channel & CHAN_NO_VID)) { 674 device_create_file(&new_client->dev, &dev_attr_cpu0_vid); 675 device_create_file(&new_client->dev, &dev_attr_vrm); 676 } 677 678 device_create_file(&new_client->dev, &dev_attr_alarms); 679 device_create_file(&new_client->dev, &dev_attr_aout_output); 680 681 return 0; 682 683 exit_detach: 684 i2c_detach_client(new_client); 685 exit_free: 686 kfree(data); 687 exit: 688 return err; 689 } 690 691 static void lm87_init_client(struct i2c_client *client) 692 { 693 struct lm87_data *data = i2c_get_clientdata(client); 694 u8 config; 695 696 data->channel = lm87_read_value(client, LM87_REG_CHANNEL_MODE); 697 data->vrm = vid_which_vrm(); 698 699 config = lm87_read_value(client, LM87_REG_CONFIG); 700 if (!(config & 0x01)) { 701 int i; 702 703 /* Limits are left uninitialized after power-up */ 704 for (i = 1; i < 6; i++) { 705 lm87_write_value(client, LM87_REG_IN_MIN(i), 0x00); 706 lm87_write_value(client, LM87_REG_IN_MAX(i), 0xFF); 707 } 708 for (i = 0; i < 2; i++) { 709 lm87_write_value(client, LM87_REG_TEMP_HIGH[i], 0x7F); 710 lm87_write_value(client, LM87_REG_TEMP_LOW[i], 0x00); 711 lm87_write_value(client, LM87_REG_AIN_MIN(i), 0x00); 712 lm87_write_value(client, LM87_REG_AIN_MAX(i), 0xFF); 713 } 714 if (data->channel & CHAN_TEMP3) { 715 lm87_write_value(client, LM87_REG_TEMP_HIGH[2], 0x7F); 716 lm87_write_value(client, LM87_REG_TEMP_LOW[2], 0x00); 717 } else { 718 lm87_write_value(client, LM87_REG_IN_MIN(0), 0x00); 719 lm87_write_value(client, LM87_REG_IN_MAX(0), 0xFF); 720 } 721 } 722 if ((config & 0x81) != 0x01) { 723 /* Start monitoring */ 724 lm87_write_value(client, LM87_REG_CONFIG, 725 (config & 0xF7) | 0x01); 726 } 727 } 728 729 static int lm87_detach_client(struct i2c_client *client) 730 { 731 struct lm87_data *data = i2c_get_clientdata(client); 732 int err; 733 734 hwmon_device_unregister(data->class_dev); 735 736 if ((err = i2c_detach_client(client))) 737 return err; 738 739 kfree(data); 740 return 0; 741 } 742 743 static struct lm87_data *lm87_update_device(struct device *dev) 744 { 745 struct i2c_client *client = to_i2c_client(dev); 746 struct lm87_data *data = i2c_get_clientdata(client); 747 748 mutex_lock(&data->update_lock); 749 750 if (time_after(jiffies, data->last_updated + HZ) || !data->valid) { 751 int i, j; 752 753 dev_dbg(&client->dev, "Updating data.\n"); 754 755 i = (data->channel & CHAN_TEMP3) ? 1 : 0; 756 j = (data->channel & CHAN_TEMP3) ? 5 : 6; 757 for (; i < j; i++) { 758 data->in[i] = lm87_read_value(client, 759 LM87_REG_IN(i)); 760 data->in_min[i] = lm87_read_value(client, 761 LM87_REG_IN_MIN(i)); 762 data->in_max[i] = lm87_read_value(client, 763 LM87_REG_IN_MAX(i)); 764 } 765 766 for (i = 0; i < 2; i++) { 767 if (data->channel & CHAN_NO_FAN(i)) { 768 data->in[6+i] = lm87_read_value(client, 769 LM87_REG_AIN(i)); 770 data->in_max[6+i] = lm87_read_value(client, 771 LM87_REG_AIN_MAX(i)); 772 data->in_min[6+i] = lm87_read_value(client, 773 LM87_REG_AIN_MIN(i)); 774 775 } else { 776 data->fan[i] = lm87_read_value(client, 777 LM87_REG_FAN(i)); 778 data->fan_min[i] = lm87_read_value(client, 779 LM87_REG_FAN_MIN(i)); 780 } 781 } 782 783 j = (data->channel & CHAN_TEMP3) ? 3 : 2; 784 for (i = 0 ; i < j; i++) { 785 data->temp[i] = lm87_read_value(client, 786 LM87_REG_TEMP[i]); 787 data->temp_high[i] = lm87_read_value(client, 788 LM87_REG_TEMP_HIGH[i]); 789 data->temp_low[i] = lm87_read_value(client, 790 LM87_REG_TEMP_LOW[i]); 791 } 792 793 i = lm87_read_value(client, LM87_REG_TEMP_HW_INT_LOCK); 794 j = lm87_read_value(client, LM87_REG_TEMP_HW_INT); 795 data->temp_crit_int = min(i, j); 796 797 i = lm87_read_value(client, LM87_REG_TEMP_HW_EXT_LOCK); 798 j = lm87_read_value(client, LM87_REG_TEMP_HW_EXT); 799 data->temp_crit_ext = min(i, j); 800 801 i = lm87_read_value(client, LM87_REG_VID_FAN_DIV); 802 data->fan_div[0] = (i >> 4) & 0x03; 803 data->fan_div[1] = (i >> 6) & 0x03; 804 data->vid = (i & 0x0F) 805 | (lm87_read_value(client, LM87_REG_VID4) & 0x01) 806 << 4; 807 808 data->alarms = lm87_read_value(client, LM87_REG_ALARMS1) 809 | (lm87_read_value(client, LM87_REG_ALARMS2) 810 << 8); 811 data->aout = lm87_read_value(client, LM87_REG_AOUT); 812 813 data->last_updated = jiffies; 814 data->valid = 1; 815 } 816 817 mutex_unlock(&data->update_lock); 818 819 return data; 820 } 821 822 static int __init sensors_lm87_init(void) 823 { 824 return i2c_add_driver(&lm87_driver); 825 } 826 827 static void __exit sensors_lm87_exit(void) 828 { 829 i2c_del_driver(&lm87_driver); 830 } 831 832 MODULE_AUTHOR("Jean Delvare <khali@linux-fr.org> and others"); 833 MODULE_DESCRIPTION("LM87 driver"); 834 MODULE_LICENSE("GPL"); 835 836 module_init(sensors_lm87_init); 837 module_exit(sensors_lm87_exit); 838