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) 2004,2007 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 driver also supports the ADM1024, a sensor chip made by Analog 41 * Devices. That chip is fully compatible with the LM87. Complete 42 * datasheet can be obtained from Analog's website at: 43 * http://www.analog.com/en/prod/0,2877,ADM1024,00.html 44 * 45 * This program is free software; you can redistribute it and/or modify 46 * it under the terms of the GNU General Public License as published by 47 * the Free Software Foundation; either version 2 of the License, or 48 * (at your option) any later version. 49 * 50 * This program is distributed in the hope that it will be useful, 51 * but WITHOUT ANY WARRANTY; without even the implied warranty of 52 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 53 * GNU General Public License for more details. 54 * 55 * You should have received a copy of the GNU General Public License 56 * along with this program; if not, write to the Free Software 57 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 58 */ 59 60 #include <linux/module.h> 61 #include <linux/init.h> 62 #include <linux/slab.h> 63 #include <linux/jiffies.h> 64 #include <linux/i2c.h> 65 #include <linux/hwmon.h> 66 #include <linux/hwmon-sysfs.h> 67 #include <linux/hwmon-vid.h> 68 #include <linux/err.h> 69 #include <linux/mutex.h> 70 71 /* 72 * Addresses to scan 73 * LM87 has three possible addresses: 0x2c, 0x2d and 0x2e. 74 */ 75 76 static const unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, I2C_CLIENT_END }; 77 78 /* 79 * Insmod parameters 80 */ 81 82 I2C_CLIENT_INSMOD_2(lm87, adm1024); 83 84 /* 85 * The LM87 registers 86 */ 87 88 /* nr in 0..5 */ 89 #define LM87_REG_IN(nr) (0x20 + (nr)) 90 #define LM87_REG_IN_MAX(nr) (0x2B + (nr) * 2) 91 #define LM87_REG_IN_MIN(nr) (0x2C + (nr) * 2) 92 /* nr in 0..1 */ 93 #define LM87_REG_AIN(nr) (0x28 + (nr)) 94 #define LM87_REG_AIN_MIN(nr) (0x1A + (nr)) 95 #define LM87_REG_AIN_MAX(nr) (0x3B + (nr)) 96 97 static u8 LM87_REG_TEMP[3] = { 0x27, 0x26, 0x20 }; 98 static u8 LM87_REG_TEMP_HIGH[3] = { 0x39, 0x37, 0x2B }; 99 static u8 LM87_REG_TEMP_LOW[3] = { 0x3A, 0x38, 0x2C }; 100 101 #define LM87_REG_TEMP_HW_INT_LOCK 0x13 102 #define LM87_REG_TEMP_HW_EXT_LOCK 0x14 103 #define LM87_REG_TEMP_HW_INT 0x17 104 #define LM87_REG_TEMP_HW_EXT 0x18 105 106 /* nr in 0..1 */ 107 #define LM87_REG_FAN(nr) (0x28 + (nr)) 108 #define LM87_REG_FAN_MIN(nr) (0x3B + (nr)) 109 #define LM87_REG_AOUT 0x19 110 111 #define LM87_REG_CONFIG 0x40 112 #define LM87_REG_CHANNEL_MODE 0x16 113 #define LM87_REG_VID_FAN_DIV 0x47 114 #define LM87_REG_VID4 0x49 115 116 #define LM87_REG_ALARMS1 0x41 117 #define LM87_REG_ALARMS2 0x42 118 119 #define LM87_REG_COMPANY_ID 0x3E 120 #define LM87_REG_REVISION 0x3F 121 122 /* 123 * Conversions and various macros 124 * The LM87 uses signed 8-bit values for temperatures. 125 */ 126 127 #define IN_FROM_REG(reg,scale) (((reg) * (scale) + 96) / 192) 128 #define IN_TO_REG(val,scale) ((val) <= 0 ? 0 : \ 129 (val) * 192 >= (scale) * 255 ? 255 : \ 130 ((val) * 192 + (scale)/2) / (scale)) 131 132 #define TEMP_FROM_REG(reg) ((reg) * 1000) 133 #define TEMP_TO_REG(val) ((val) <= -127500 ? -128 : \ 134 (val) >= 126500 ? 127 : \ 135 (((val) < 0 ? (val)-500 : (val)+500) / 1000)) 136 137 #define FAN_FROM_REG(reg,div) ((reg) == 255 || (reg) == 0 ? 0 : \ 138 (1350000 + (reg)*(div) / 2) / ((reg)*(div))) 139 #define FAN_TO_REG(val,div) ((val)*(div) * 255 <= 1350000 ? 255 : \ 140 (1350000 + (val)*(div) / 2) / ((val)*(div))) 141 142 #define FAN_DIV_FROM_REG(reg) (1 << (reg)) 143 144 /* analog out is 9.80mV/LSB */ 145 #define AOUT_FROM_REG(reg) (((reg) * 98 + 5) / 10) 146 #define AOUT_TO_REG(val) ((val) <= 0 ? 0 : \ 147 (val) >= 2500 ? 255 : \ 148 ((val) * 10 + 49) / 98) 149 150 /* nr in 0..1 */ 151 #define CHAN_NO_FAN(nr) (1 << (nr)) 152 #define CHAN_TEMP3 (1 << 2) 153 #define CHAN_VCC_5V (1 << 3) 154 #define CHAN_NO_VID (1 << 7) 155 156 /* 157 * Functions declaration 158 */ 159 160 static int lm87_attach_adapter(struct i2c_adapter *adapter); 161 static int lm87_detect(struct i2c_adapter *adapter, int address, int kind); 162 static void lm87_init_client(struct i2c_client *client); 163 static int lm87_detach_client(struct i2c_client *client); 164 static struct lm87_data *lm87_update_device(struct device *dev); 165 166 /* 167 * Driver data (common to all clients) 168 */ 169 170 static struct i2c_driver lm87_driver = { 171 .driver = { 172 .name = "lm87", 173 }, 174 .attach_adapter = lm87_attach_adapter, 175 .detach_client = lm87_detach_client, 176 }; 177 178 /* 179 * Client data (each client gets its own) 180 */ 181 182 struct lm87_data { 183 struct i2c_client client; 184 struct device *hwmon_dev; 185 struct mutex update_lock; 186 char valid; /* zero until following fields are valid */ 187 unsigned long last_updated; /* In jiffies */ 188 189 u8 channel; /* register value */ 190 191 u8 in[8]; /* register value */ 192 u8 in_max[8]; /* register value */ 193 u8 in_min[8]; /* register value */ 194 u16 in_scale[8]; 195 196 s8 temp[3]; /* register value */ 197 s8 temp_high[3]; /* register value */ 198 s8 temp_low[3]; /* register value */ 199 s8 temp_crit_int; /* min of two register values */ 200 s8 temp_crit_ext; /* min of two register values */ 201 202 u8 fan[2]; /* register value */ 203 u8 fan_min[2]; /* register value */ 204 u8 fan_div[2]; /* register value, shifted right */ 205 u8 aout; /* register value */ 206 207 u16 alarms; /* register values, combined */ 208 u8 vid; /* register values, combined */ 209 u8 vrm; 210 }; 211 212 /* 213 * Sysfs stuff 214 */ 215 216 static inline int lm87_read_value(struct i2c_client *client, u8 reg) 217 { 218 return i2c_smbus_read_byte_data(client, reg); 219 } 220 221 static inline int lm87_write_value(struct i2c_client *client, u8 reg, u8 value) 222 { 223 return i2c_smbus_write_byte_data(client, reg, value); 224 } 225 226 #define show_in(offset) \ 227 static ssize_t show_in##offset##_input(struct device *dev, struct device_attribute *attr, char *buf) \ 228 { \ 229 struct lm87_data *data = lm87_update_device(dev); \ 230 return sprintf(buf, "%u\n", IN_FROM_REG(data->in[offset], \ 231 data->in_scale[offset])); \ 232 } \ 233 static ssize_t show_in##offset##_min(struct device *dev, struct device_attribute *attr, char *buf) \ 234 { \ 235 struct lm87_data *data = lm87_update_device(dev); \ 236 return sprintf(buf, "%u\n", IN_FROM_REG(data->in_min[offset], \ 237 data->in_scale[offset])); \ 238 } \ 239 static ssize_t show_in##offset##_max(struct device *dev, struct device_attribute *attr, char *buf) \ 240 { \ 241 struct lm87_data *data = lm87_update_device(dev); \ 242 return sprintf(buf, "%u\n", IN_FROM_REG(data->in_max[offset], \ 243 data->in_scale[offset])); \ 244 } \ 245 static DEVICE_ATTR(in##offset##_input, S_IRUGO, \ 246 show_in##offset##_input, NULL); 247 show_in(0); 248 show_in(1); 249 show_in(2); 250 show_in(3); 251 show_in(4); 252 show_in(5); 253 show_in(6); 254 show_in(7); 255 256 static void set_in_min(struct device *dev, const char *buf, int nr) 257 { 258 struct i2c_client *client = to_i2c_client(dev); 259 struct lm87_data *data = i2c_get_clientdata(client); 260 long val = simple_strtol(buf, NULL, 10); 261 262 mutex_lock(&data->update_lock); 263 data->in_min[nr] = IN_TO_REG(val, data->in_scale[nr]); 264 lm87_write_value(client, nr<6 ? LM87_REG_IN_MIN(nr) : 265 LM87_REG_AIN_MIN(nr-6), data->in_min[nr]); 266 mutex_unlock(&data->update_lock); 267 } 268 269 static void set_in_max(struct device *dev, const char *buf, int nr) 270 { 271 struct i2c_client *client = to_i2c_client(dev); 272 struct lm87_data *data = i2c_get_clientdata(client); 273 long val = simple_strtol(buf, NULL, 10); 274 275 mutex_lock(&data->update_lock); 276 data->in_max[nr] = IN_TO_REG(val, data->in_scale[nr]); 277 lm87_write_value(client, nr<6 ? LM87_REG_IN_MAX(nr) : 278 LM87_REG_AIN_MAX(nr-6), data->in_max[nr]); 279 mutex_unlock(&data->update_lock); 280 } 281 282 #define set_in(offset) \ 283 static ssize_t set_in##offset##_min(struct device *dev, struct device_attribute *attr, \ 284 const char *buf, size_t count) \ 285 { \ 286 set_in_min(dev, buf, offset); \ 287 return count; \ 288 } \ 289 static ssize_t set_in##offset##_max(struct device *dev, struct device_attribute *attr, \ 290 const char *buf, size_t count) \ 291 { \ 292 set_in_max(dev, buf, offset); \ 293 return count; \ 294 } \ 295 static DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \ 296 show_in##offset##_min, set_in##offset##_min); \ 297 static DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \ 298 show_in##offset##_max, set_in##offset##_max); 299 set_in(0); 300 set_in(1); 301 set_in(2); 302 set_in(3); 303 set_in(4); 304 set_in(5); 305 set_in(6); 306 set_in(7); 307 308 #define show_temp(offset) \ 309 static ssize_t show_temp##offset##_input(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[offset-1])); \ 313 } \ 314 static ssize_t show_temp##offset##_low(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_low[offset-1])); \ 318 } \ 319 static ssize_t show_temp##offset##_high(struct device *dev, struct device_attribute *attr, char *buf) \ 320 { \ 321 struct lm87_data *data = lm87_update_device(dev); \ 322 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_high[offset-1])); \ 323 }\ 324 static DEVICE_ATTR(temp##offset##_input, S_IRUGO, \ 325 show_temp##offset##_input, NULL); 326 show_temp(1); 327 show_temp(2); 328 show_temp(3); 329 330 static void set_temp_low(struct device *dev, const char *buf, int nr) 331 { 332 struct i2c_client *client = to_i2c_client(dev); 333 struct lm87_data *data = i2c_get_clientdata(client); 334 long val = simple_strtol(buf, NULL, 10); 335 336 mutex_lock(&data->update_lock); 337 data->temp_low[nr] = TEMP_TO_REG(val); 338 lm87_write_value(client, LM87_REG_TEMP_LOW[nr], data->temp_low[nr]); 339 mutex_unlock(&data->update_lock); 340 } 341 342 static void set_temp_high(struct device *dev, const char *buf, int nr) 343 { 344 struct i2c_client *client = to_i2c_client(dev); 345 struct lm87_data *data = i2c_get_clientdata(client); 346 long val = simple_strtol(buf, NULL, 10); 347 348 mutex_lock(&data->update_lock); 349 data->temp_high[nr] = TEMP_TO_REG(val); 350 lm87_write_value(client, LM87_REG_TEMP_HIGH[nr], data->temp_high[nr]); 351 mutex_unlock(&data->update_lock); 352 } 353 354 #define set_temp(offset) \ 355 static ssize_t set_temp##offset##_low(struct device *dev, struct device_attribute *attr, \ 356 const char *buf, size_t count) \ 357 { \ 358 set_temp_low(dev, buf, offset-1); \ 359 return count; \ 360 } \ 361 static ssize_t set_temp##offset##_high(struct device *dev, struct device_attribute *attr, \ 362 const char *buf, size_t count) \ 363 { \ 364 set_temp_high(dev, buf, offset-1); \ 365 return count; \ 366 } \ 367 static DEVICE_ATTR(temp##offset##_max, S_IRUGO | S_IWUSR, \ 368 show_temp##offset##_high, set_temp##offset##_high); \ 369 static DEVICE_ATTR(temp##offset##_min, S_IRUGO | S_IWUSR, \ 370 show_temp##offset##_low, set_temp##offset##_low); 371 set_temp(1); 372 set_temp(2); 373 set_temp(3); 374 375 static ssize_t show_temp_crit_int(struct device *dev, struct device_attribute *attr, char *buf) 376 { 377 struct lm87_data *data = lm87_update_device(dev); 378 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_crit_int)); 379 } 380 381 static ssize_t show_temp_crit_ext(struct device *dev, struct device_attribute *attr, char *buf) 382 { 383 struct lm87_data *data = lm87_update_device(dev); 384 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_crit_ext)); 385 } 386 387 static DEVICE_ATTR(temp1_crit, S_IRUGO, show_temp_crit_int, NULL); 388 static DEVICE_ATTR(temp2_crit, S_IRUGO, show_temp_crit_ext, NULL); 389 static DEVICE_ATTR(temp3_crit, S_IRUGO, show_temp_crit_ext, NULL); 390 391 #define show_fan(offset) \ 392 static ssize_t show_fan##offset##_input(struct device *dev, struct device_attribute *attr, char *buf) \ 393 { \ 394 struct lm87_data *data = lm87_update_device(dev); \ 395 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[offset-1], \ 396 FAN_DIV_FROM_REG(data->fan_div[offset-1]))); \ 397 } \ 398 static ssize_t show_fan##offset##_min(struct device *dev, struct device_attribute *attr, char *buf) \ 399 { \ 400 struct lm87_data *data = lm87_update_device(dev); \ 401 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[offset-1], \ 402 FAN_DIV_FROM_REG(data->fan_div[offset-1]))); \ 403 } \ 404 static ssize_t show_fan##offset##_div(struct device *dev, struct device_attribute *attr, char *buf) \ 405 { \ 406 struct lm87_data *data = lm87_update_device(dev); \ 407 return sprintf(buf, "%d\n", FAN_DIV_FROM_REG(data->fan_div[offset-1])); \ 408 } \ 409 static DEVICE_ATTR(fan##offset##_input, S_IRUGO, \ 410 show_fan##offset##_input, NULL); 411 show_fan(1); 412 show_fan(2); 413 414 static void set_fan_min(struct device *dev, const char *buf, int nr) 415 { 416 struct i2c_client *client = to_i2c_client(dev); 417 struct lm87_data *data = i2c_get_clientdata(client); 418 long val = simple_strtol(buf, NULL, 10); 419 420 mutex_lock(&data->update_lock); 421 data->fan_min[nr] = FAN_TO_REG(val, 422 FAN_DIV_FROM_REG(data->fan_div[nr])); 423 lm87_write_value(client, LM87_REG_FAN_MIN(nr), data->fan_min[nr]); 424 mutex_unlock(&data->update_lock); 425 } 426 427 /* Note: we save and restore the fan minimum here, because its value is 428 determined in part by the fan clock divider. This follows the principle 429 of least surprise; the user doesn't expect the fan minimum to change just 430 because the divider changed. */ 431 static ssize_t set_fan_div(struct device *dev, const char *buf, 432 size_t count, int nr) 433 { 434 struct i2c_client *client = to_i2c_client(dev); 435 struct lm87_data *data = i2c_get_clientdata(client); 436 long val = simple_strtol(buf, NULL, 10); 437 unsigned long min; 438 u8 reg; 439 440 mutex_lock(&data->update_lock); 441 min = FAN_FROM_REG(data->fan_min[nr], 442 FAN_DIV_FROM_REG(data->fan_div[nr])); 443 444 switch (val) { 445 case 1: data->fan_div[nr] = 0; break; 446 case 2: data->fan_div[nr] = 1; break; 447 case 4: data->fan_div[nr] = 2; break; 448 case 8: data->fan_div[nr] = 3; break; 449 default: 450 mutex_unlock(&data->update_lock); 451 return -EINVAL; 452 } 453 454 reg = lm87_read_value(client, LM87_REG_VID_FAN_DIV); 455 switch (nr) { 456 case 0: 457 reg = (reg & 0xCF) | (data->fan_div[0] << 4); 458 break; 459 case 1: 460 reg = (reg & 0x3F) | (data->fan_div[1] << 6); 461 break; 462 } 463 lm87_write_value(client, LM87_REG_VID_FAN_DIV, reg); 464 465 data->fan_min[nr] = FAN_TO_REG(min, val); 466 lm87_write_value(client, LM87_REG_FAN_MIN(nr), 467 data->fan_min[nr]); 468 mutex_unlock(&data->update_lock); 469 470 return count; 471 } 472 473 #define set_fan(offset) \ 474 static ssize_t set_fan##offset##_min(struct device *dev, struct device_attribute *attr, const char *buf, \ 475 size_t count) \ 476 { \ 477 set_fan_min(dev, buf, offset-1); \ 478 return count; \ 479 } \ 480 static ssize_t set_fan##offset##_div(struct device *dev, struct device_attribute *attr, const char *buf, \ 481 size_t count) \ 482 { \ 483 return set_fan_div(dev, buf, count, offset-1); \ 484 } \ 485 static DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \ 486 show_fan##offset##_min, set_fan##offset##_min); \ 487 static DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR, \ 488 show_fan##offset##_div, set_fan##offset##_div); 489 set_fan(1); 490 set_fan(2); 491 492 static ssize_t show_alarms(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", data->alarms); 496 } 497 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL); 498 499 static ssize_t show_vid(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", vid_from_reg(data->vid, data->vrm)); 503 } 504 static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid, NULL); 505 506 static ssize_t show_vrm(struct device *dev, struct device_attribute *attr, char *buf) 507 { 508 struct lm87_data *data = dev_get_drvdata(dev); 509 return sprintf(buf, "%d\n", data->vrm); 510 } 511 static ssize_t set_vrm(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) 512 { 513 struct lm87_data *data = dev_get_drvdata(dev); 514 data->vrm = simple_strtoul(buf, NULL, 10); 515 return count; 516 } 517 static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm, set_vrm); 518 519 static ssize_t show_aout(struct device *dev, struct device_attribute *attr, char *buf) 520 { 521 struct lm87_data *data = lm87_update_device(dev); 522 return sprintf(buf, "%d\n", AOUT_FROM_REG(data->aout)); 523 } 524 static ssize_t set_aout(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) 525 { 526 struct i2c_client *client = to_i2c_client(dev); 527 struct lm87_data *data = i2c_get_clientdata(client); 528 long val = simple_strtol(buf, NULL, 10); 529 530 mutex_lock(&data->update_lock); 531 data->aout = AOUT_TO_REG(val); 532 lm87_write_value(client, LM87_REG_AOUT, data->aout); 533 mutex_unlock(&data->update_lock); 534 return count; 535 } 536 static DEVICE_ATTR(aout_output, S_IRUGO | S_IWUSR, show_aout, set_aout); 537 538 static ssize_t show_alarm(struct device *dev, struct device_attribute *attr, 539 char *buf) 540 { 541 struct lm87_data *data = lm87_update_device(dev); 542 int bitnr = to_sensor_dev_attr(attr)->index; 543 return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1); 544 } 545 static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0); 546 static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 1); 547 static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 2); 548 static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 3); 549 static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 8); 550 static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 9); 551 static SENSOR_DEVICE_ATTR(in6_alarm, S_IRUGO, show_alarm, NULL, 6); 552 static SENSOR_DEVICE_ATTR(in7_alarm, S_IRUGO, show_alarm, NULL, 7); 553 static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 4); 554 static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 5); 555 static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL, 5); 556 static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 6); 557 static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 7); 558 static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_alarm, NULL, 14); 559 static SENSOR_DEVICE_ATTR(temp3_fault, S_IRUGO, show_alarm, NULL, 15); 560 561 /* 562 * Real code 563 */ 564 565 static int lm87_attach_adapter(struct i2c_adapter *adapter) 566 { 567 if (!(adapter->class & I2C_CLASS_HWMON)) 568 return 0; 569 return i2c_probe(adapter, &addr_data, lm87_detect); 570 } 571 572 static struct attribute *lm87_attributes[] = { 573 &dev_attr_in1_input.attr, 574 &dev_attr_in1_min.attr, 575 &dev_attr_in1_max.attr, 576 &sensor_dev_attr_in1_alarm.dev_attr.attr, 577 &dev_attr_in2_input.attr, 578 &dev_attr_in2_min.attr, 579 &dev_attr_in2_max.attr, 580 &sensor_dev_attr_in2_alarm.dev_attr.attr, 581 &dev_attr_in3_input.attr, 582 &dev_attr_in3_min.attr, 583 &dev_attr_in3_max.attr, 584 &sensor_dev_attr_in3_alarm.dev_attr.attr, 585 &dev_attr_in4_input.attr, 586 &dev_attr_in4_min.attr, 587 &dev_attr_in4_max.attr, 588 &sensor_dev_attr_in4_alarm.dev_attr.attr, 589 590 &dev_attr_temp1_input.attr, 591 &dev_attr_temp1_max.attr, 592 &dev_attr_temp1_min.attr, 593 &dev_attr_temp1_crit.attr, 594 &sensor_dev_attr_temp1_alarm.dev_attr.attr, 595 &dev_attr_temp2_input.attr, 596 &dev_attr_temp2_max.attr, 597 &dev_attr_temp2_min.attr, 598 &dev_attr_temp2_crit.attr, 599 &sensor_dev_attr_temp2_alarm.dev_attr.attr, 600 &sensor_dev_attr_temp2_fault.dev_attr.attr, 601 602 &dev_attr_alarms.attr, 603 &dev_attr_aout_output.attr, 604 605 NULL 606 }; 607 608 static const struct attribute_group lm87_group = { 609 .attrs = lm87_attributes, 610 }; 611 612 static struct attribute *lm87_attributes_opt[] = { 613 &dev_attr_in6_input.attr, 614 &dev_attr_in6_min.attr, 615 &dev_attr_in6_max.attr, 616 &sensor_dev_attr_in6_alarm.dev_attr.attr, 617 618 &dev_attr_fan1_input.attr, 619 &dev_attr_fan1_min.attr, 620 &dev_attr_fan1_div.attr, 621 &sensor_dev_attr_fan1_alarm.dev_attr.attr, 622 623 &dev_attr_in7_input.attr, 624 &dev_attr_in7_min.attr, 625 &dev_attr_in7_max.attr, 626 &sensor_dev_attr_in7_alarm.dev_attr.attr, 627 628 &dev_attr_fan2_input.attr, 629 &dev_attr_fan2_min.attr, 630 &dev_attr_fan2_div.attr, 631 &sensor_dev_attr_fan2_alarm.dev_attr.attr, 632 633 &dev_attr_temp3_input.attr, 634 &dev_attr_temp3_max.attr, 635 &dev_attr_temp3_min.attr, 636 &dev_attr_temp3_crit.attr, 637 &sensor_dev_attr_temp3_alarm.dev_attr.attr, 638 &sensor_dev_attr_temp3_fault.dev_attr.attr, 639 640 &dev_attr_in0_input.attr, 641 &dev_attr_in0_min.attr, 642 &dev_attr_in0_max.attr, 643 &sensor_dev_attr_in0_alarm.dev_attr.attr, 644 &dev_attr_in5_input.attr, 645 &dev_attr_in5_min.attr, 646 &dev_attr_in5_max.attr, 647 &sensor_dev_attr_in5_alarm.dev_attr.attr, 648 649 &dev_attr_cpu0_vid.attr, 650 &dev_attr_vrm.attr, 651 652 NULL 653 }; 654 655 static const struct attribute_group lm87_group_opt = { 656 .attrs = lm87_attributes_opt, 657 }; 658 659 /* 660 * The following function does more than just detection. If detection 661 * succeeds, it also registers the new chip. 662 */ 663 static int lm87_detect(struct i2c_adapter *adapter, int address, int kind) 664 { 665 struct i2c_client *new_client; 666 struct lm87_data *data; 667 int err = 0; 668 static const char *names[] = { "lm87", "adm1024" }; 669 670 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) 671 goto exit; 672 673 if (!(data = kzalloc(sizeof(struct lm87_data), GFP_KERNEL))) { 674 err = -ENOMEM; 675 goto exit; 676 } 677 678 /* The common I2C client data is placed right before the 679 LM87-specific data. */ 680 new_client = &data->client; 681 i2c_set_clientdata(new_client, data); 682 new_client->addr = address; 683 new_client->adapter = adapter; 684 new_client->driver = &lm87_driver; 685 new_client->flags = 0; 686 687 /* Default to an LM87 if forced */ 688 if (kind == 0) 689 kind = lm87; 690 691 /* Now, we do the remaining detection. */ 692 if (kind < 0) { 693 u8 cid = lm87_read_value(new_client, LM87_REG_COMPANY_ID); 694 u8 rev = lm87_read_value(new_client, LM87_REG_REVISION); 695 696 if (cid == 0x02 /* National Semiconductor */ 697 && (rev >= 0x01 && rev <= 0x08)) 698 kind = lm87; 699 else if (cid == 0x41 /* Analog Devices */ 700 && (rev & 0xf0) == 0x10) 701 kind = adm1024; 702 703 if (kind < 0 704 || (lm87_read_value(new_client, LM87_REG_CONFIG) & 0x80)) { 705 dev_dbg(&adapter->dev, 706 "LM87 detection failed at 0x%02x.\n", 707 address); 708 goto exit_free; 709 } 710 } 711 712 /* We can fill in the remaining client fields */ 713 strlcpy(new_client->name, names[kind - 1], I2C_NAME_SIZE); 714 data->valid = 0; 715 mutex_init(&data->update_lock); 716 717 /* Tell the I2C layer a new client has arrived */ 718 if ((err = i2c_attach_client(new_client))) 719 goto exit_free; 720 721 /* Initialize the LM87 chip */ 722 lm87_init_client(new_client); 723 724 data->in_scale[0] = 2500; 725 data->in_scale[1] = 2700; 726 data->in_scale[2] = (data->channel & CHAN_VCC_5V) ? 5000 : 3300; 727 data->in_scale[3] = 5000; 728 data->in_scale[4] = 12000; 729 data->in_scale[5] = 2700; 730 data->in_scale[6] = 1875; 731 data->in_scale[7] = 1875; 732 733 /* Register sysfs hooks */ 734 if ((err = sysfs_create_group(&new_client->dev.kobj, &lm87_group))) 735 goto exit_detach; 736 737 if (data->channel & CHAN_NO_FAN(0)) { 738 if ((err = device_create_file(&new_client->dev, 739 &dev_attr_in6_input)) 740 || (err = device_create_file(&new_client->dev, 741 &dev_attr_in6_min)) 742 || (err = device_create_file(&new_client->dev, 743 &dev_attr_in6_max)) 744 || (err = device_create_file(&new_client->dev, 745 &sensor_dev_attr_in6_alarm.dev_attr))) 746 goto exit_remove; 747 } else { 748 if ((err = device_create_file(&new_client->dev, 749 &dev_attr_fan1_input)) 750 || (err = device_create_file(&new_client->dev, 751 &dev_attr_fan1_min)) 752 || (err = device_create_file(&new_client->dev, 753 &dev_attr_fan1_div)) 754 || (err = device_create_file(&new_client->dev, 755 &sensor_dev_attr_fan1_alarm.dev_attr))) 756 goto exit_remove; 757 } 758 759 if (data->channel & CHAN_NO_FAN(1)) { 760 if ((err = device_create_file(&new_client->dev, 761 &dev_attr_in7_input)) 762 || (err = device_create_file(&new_client->dev, 763 &dev_attr_in7_min)) 764 || (err = device_create_file(&new_client->dev, 765 &dev_attr_in7_max)) 766 || (err = device_create_file(&new_client->dev, 767 &sensor_dev_attr_in7_alarm.dev_attr))) 768 goto exit_remove; 769 } else { 770 if ((err = device_create_file(&new_client->dev, 771 &dev_attr_fan2_input)) 772 || (err = device_create_file(&new_client->dev, 773 &dev_attr_fan2_min)) 774 || (err = device_create_file(&new_client->dev, 775 &dev_attr_fan2_div)) 776 || (err = device_create_file(&new_client->dev, 777 &sensor_dev_attr_fan2_alarm.dev_attr))) 778 goto exit_remove; 779 } 780 781 if (data->channel & CHAN_TEMP3) { 782 if ((err = device_create_file(&new_client->dev, 783 &dev_attr_temp3_input)) 784 || (err = device_create_file(&new_client->dev, 785 &dev_attr_temp3_max)) 786 || (err = device_create_file(&new_client->dev, 787 &dev_attr_temp3_min)) 788 || (err = device_create_file(&new_client->dev, 789 &dev_attr_temp3_crit)) 790 || (err = device_create_file(&new_client->dev, 791 &sensor_dev_attr_temp3_alarm.dev_attr)) 792 || (err = device_create_file(&new_client->dev, 793 &sensor_dev_attr_temp3_fault.dev_attr))) 794 goto exit_remove; 795 } else { 796 if ((err = device_create_file(&new_client->dev, 797 &dev_attr_in0_input)) 798 || (err = device_create_file(&new_client->dev, 799 &dev_attr_in0_min)) 800 || (err = device_create_file(&new_client->dev, 801 &dev_attr_in0_max)) 802 || (err = device_create_file(&new_client->dev, 803 &sensor_dev_attr_in0_alarm.dev_attr)) 804 || (err = device_create_file(&new_client->dev, 805 &dev_attr_in5_input)) 806 || (err = device_create_file(&new_client->dev, 807 &dev_attr_in5_min)) 808 || (err = device_create_file(&new_client->dev, 809 &dev_attr_in5_max)) 810 || (err = device_create_file(&new_client->dev, 811 &sensor_dev_attr_in5_alarm.dev_attr))) 812 goto exit_remove; 813 } 814 815 if (!(data->channel & CHAN_NO_VID)) { 816 data->vrm = vid_which_vrm(); 817 if ((err = device_create_file(&new_client->dev, 818 &dev_attr_cpu0_vid)) 819 || (err = device_create_file(&new_client->dev, 820 &dev_attr_vrm))) 821 goto exit_remove; 822 } 823 824 data->hwmon_dev = hwmon_device_register(&new_client->dev); 825 if (IS_ERR(data->hwmon_dev)) { 826 err = PTR_ERR(data->hwmon_dev); 827 goto exit_remove; 828 } 829 830 return 0; 831 832 exit_remove: 833 sysfs_remove_group(&new_client->dev.kobj, &lm87_group); 834 sysfs_remove_group(&new_client->dev.kobj, &lm87_group_opt); 835 exit_detach: 836 i2c_detach_client(new_client); 837 exit_free: 838 kfree(data); 839 exit: 840 return err; 841 } 842 843 static void lm87_init_client(struct i2c_client *client) 844 { 845 struct lm87_data *data = i2c_get_clientdata(client); 846 u8 config; 847 848 data->channel = lm87_read_value(client, LM87_REG_CHANNEL_MODE); 849 850 config = lm87_read_value(client, LM87_REG_CONFIG); 851 if (!(config & 0x01)) { 852 int i; 853 854 /* Limits are left uninitialized after power-up */ 855 for (i = 1; i < 6; i++) { 856 lm87_write_value(client, LM87_REG_IN_MIN(i), 0x00); 857 lm87_write_value(client, LM87_REG_IN_MAX(i), 0xFF); 858 } 859 for (i = 0; i < 2; i++) { 860 lm87_write_value(client, LM87_REG_TEMP_HIGH[i], 0x7F); 861 lm87_write_value(client, LM87_REG_TEMP_LOW[i], 0x00); 862 lm87_write_value(client, LM87_REG_AIN_MIN(i), 0x00); 863 lm87_write_value(client, LM87_REG_AIN_MAX(i), 0xFF); 864 } 865 if (data->channel & CHAN_TEMP3) { 866 lm87_write_value(client, LM87_REG_TEMP_HIGH[2], 0x7F); 867 lm87_write_value(client, LM87_REG_TEMP_LOW[2], 0x00); 868 } else { 869 lm87_write_value(client, LM87_REG_IN_MIN(0), 0x00); 870 lm87_write_value(client, LM87_REG_IN_MAX(0), 0xFF); 871 } 872 } 873 if ((config & 0x81) != 0x01) { 874 /* Start monitoring */ 875 lm87_write_value(client, LM87_REG_CONFIG, 876 (config & 0xF7) | 0x01); 877 } 878 } 879 880 static int lm87_detach_client(struct i2c_client *client) 881 { 882 struct lm87_data *data = i2c_get_clientdata(client); 883 int err; 884 885 hwmon_device_unregister(data->hwmon_dev); 886 sysfs_remove_group(&client->dev.kobj, &lm87_group); 887 sysfs_remove_group(&client->dev.kobj, &lm87_group_opt); 888 889 if ((err = i2c_detach_client(client))) 890 return err; 891 892 kfree(data); 893 return 0; 894 } 895 896 static struct lm87_data *lm87_update_device(struct device *dev) 897 { 898 struct i2c_client *client = to_i2c_client(dev); 899 struct lm87_data *data = i2c_get_clientdata(client); 900 901 mutex_lock(&data->update_lock); 902 903 if (time_after(jiffies, data->last_updated + HZ) || !data->valid) { 904 int i, j; 905 906 dev_dbg(&client->dev, "Updating data.\n"); 907 908 i = (data->channel & CHAN_TEMP3) ? 1 : 0; 909 j = (data->channel & CHAN_TEMP3) ? 5 : 6; 910 for (; i < j; i++) { 911 data->in[i] = lm87_read_value(client, 912 LM87_REG_IN(i)); 913 data->in_min[i] = lm87_read_value(client, 914 LM87_REG_IN_MIN(i)); 915 data->in_max[i] = lm87_read_value(client, 916 LM87_REG_IN_MAX(i)); 917 } 918 919 for (i = 0; i < 2; i++) { 920 if (data->channel & CHAN_NO_FAN(i)) { 921 data->in[6+i] = lm87_read_value(client, 922 LM87_REG_AIN(i)); 923 data->in_max[6+i] = lm87_read_value(client, 924 LM87_REG_AIN_MAX(i)); 925 data->in_min[6+i] = lm87_read_value(client, 926 LM87_REG_AIN_MIN(i)); 927 928 } else { 929 data->fan[i] = lm87_read_value(client, 930 LM87_REG_FAN(i)); 931 data->fan_min[i] = lm87_read_value(client, 932 LM87_REG_FAN_MIN(i)); 933 } 934 } 935 936 j = (data->channel & CHAN_TEMP3) ? 3 : 2; 937 for (i = 0 ; i < j; i++) { 938 data->temp[i] = lm87_read_value(client, 939 LM87_REG_TEMP[i]); 940 data->temp_high[i] = lm87_read_value(client, 941 LM87_REG_TEMP_HIGH[i]); 942 data->temp_low[i] = lm87_read_value(client, 943 LM87_REG_TEMP_LOW[i]); 944 } 945 946 i = lm87_read_value(client, LM87_REG_TEMP_HW_INT_LOCK); 947 j = lm87_read_value(client, LM87_REG_TEMP_HW_INT); 948 data->temp_crit_int = min(i, j); 949 950 i = lm87_read_value(client, LM87_REG_TEMP_HW_EXT_LOCK); 951 j = lm87_read_value(client, LM87_REG_TEMP_HW_EXT); 952 data->temp_crit_ext = min(i, j); 953 954 i = lm87_read_value(client, LM87_REG_VID_FAN_DIV); 955 data->fan_div[0] = (i >> 4) & 0x03; 956 data->fan_div[1] = (i >> 6) & 0x03; 957 data->vid = (i & 0x0F) 958 | (lm87_read_value(client, LM87_REG_VID4) & 0x01) 959 << 4; 960 961 data->alarms = lm87_read_value(client, LM87_REG_ALARMS1) 962 | (lm87_read_value(client, LM87_REG_ALARMS2) 963 << 8); 964 data->aout = lm87_read_value(client, LM87_REG_AOUT); 965 966 data->last_updated = jiffies; 967 data->valid = 1; 968 } 969 970 mutex_unlock(&data->update_lock); 971 972 return data; 973 } 974 975 static int __init sensors_lm87_init(void) 976 { 977 return i2c_add_driver(&lm87_driver); 978 } 979 980 static void __exit sensors_lm87_exit(void) 981 { 982 i2c_del_driver(&lm87_driver); 983 } 984 985 MODULE_AUTHOR("Jean Delvare <khali@linux-fr.org> and others"); 986 MODULE_DESCRIPTION("LM87 driver"); 987 MODULE_LICENSE("GPL"); 988 989 module_init(sensors_lm87_init); 990 module_exit(sensors_lm87_exit); 991