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-sysfs.h> 62 #include <linux/hwmon-vid.h> 63 #include <linux/err.h> 64 #include <linux/mutex.h> 65 66 /* 67 * Addresses to scan 68 * LM87 has three possible addresses: 0x2c, 0x2d and 0x2e. 69 */ 70 71 static unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, I2C_CLIENT_END }; 72 73 /* 74 * Insmod parameters 75 */ 76 77 I2C_CLIENT_INSMOD_1(lm87); 78 79 /* 80 * The LM87 registers 81 */ 82 83 /* nr in 0..5 */ 84 #define LM87_REG_IN(nr) (0x20 + (nr)) 85 #define LM87_REG_IN_MAX(nr) (0x2B + (nr) * 2) 86 #define LM87_REG_IN_MIN(nr) (0x2C + (nr) * 2) 87 /* nr in 0..1 */ 88 #define LM87_REG_AIN(nr) (0x28 + (nr)) 89 #define LM87_REG_AIN_MIN(nr) (0x1A + (nr)) 90 #define LM87_REG_AIN_MAX(nr) (0x3B + (nr)) 91 92 static u8 LM87_REG_TEMP[3] = { 0x27, 0x26, 0x20 }; 93 static u8 LM87_REG_TEMP_HIGH[3] = { 0x39, 0x37, 0x2B }; 94 static u8 LM87_REG_TEMP_LOW[3] = { 0x3A, 0x38, 0x2C }; 95 96 #define LM87_REG_TEMP_HW_INT_LOCK 0x13 97 #define LM87_REG_TEMP_HW_EXT_LOCK 0x14 98 #define LM87_REG_TEMP_HW_INT 0x17 99 #define LM87_REG_TEMP_HW_EXT 0x18 100 101 /* nr in 0..1 */ 102 #define LM87_REG_FAN(nr) (0x28 + (nr)) 103 #define LM87_REG_FAN_MIN(nr) (0x3B + (nr)) 104 #define LM87_REG_AOUT 0x19 105 106 #define LM87_REG_CONFIG 0x40 107 #define LM87_REG_CHANNEL_MODE 0x16 108 #define LM87_REG_VID_FAN_DIV 0x47 109 #define LM87_REG_VID4 0x49 110 111 #define LM87_REG_ALARMS1 0x41 112 #define LM87_REG_ALARMS2 0x42 113 114 #define LM87_REG_COMPANY_ID 0x3E 115 #define LM87_REG_REVISION 0x3F 116 117 /* 118 * Conversions and various macros 119 * The LM87 uses signed 8-bit values for temperatures. 120 */ 121 122 #define IN_FROM_REG(reg,scale) (((reg) * (scale) + 96) / 192) 123 #define IN_TO_REG(val,scale) ((val) <= 0 ? 0 : \ 124 (val) * 192 >= (scale) * 255 ? 255 : \ 125 ((val) * 192 + (scale)/2) / (scale)) 126 127 #define TEMP_FROM_REG(reg) ((reg) * 1000) 128 #define TEMP_TO_REG(val) ((val) <= -127500 ? -128 : \ 129 (val) >= 126500 ? 127 : \ 130 (((val) < 0 ? (val)-500 : (val)+500) / 1000)) 131 132 #define FAN_FROM_REG(reg,div) ((reg) == 255 || (reg) == 0 ? 0 : \ 133 (1350000 + (reg)*(div) / 2) / ((reg)*(div))) 134 #define FAN_TO_REG(val,div) ((val)*(div) * 255 <= 1350000 ? 255 : \ 135 (1350000 + (val)*(div) / 2) / ((val)*(div))) 136 137 #define FAN_DIV_FROM_REG(reg) (1 << (reg)) 138 139 /* analog out is 9.80mV/LSB */ 140 #define AOUT_FROM_REG(reg) (((reg) * 98 + 5) / 10) 141 #define AOUT_TO_REG(val) ((val) <= 0 ? 0 : \ 142 (val) >= 2500 ? 255 : \ 143 ((val) * 10 + 49) / 98) 144 145 /* nr in 0..1 */ 146 #define CHAN_NO_FAN(nr) (1 << (nr)) 147 #define CHAN_TEMP3 (1 << 2) 148 #define CHAN_VCC_5V (1 << 3) 149 #define CHAN_NO_VID (1 << 7) 150 151 /* 152 * Functions declaration 153 */ 154 155 static int lm87_attach_adapter(struct i2c_adapter *adapter); 156 static int lm87_detect(struct i2c_adapter *adapter, int address, int kind); 157 static void lm87_init_client(struct i2c_client *client); 158 static int lm87_detach_client(struct i2c_client *client); 159 static struct lm87_data *lm87_update_device(struct device *dev); 160 161 /* 162 * Driver data (common to all clients) 163 */ 164 165 static struct i2c_driver lm87_driver = { 166 .driver = { 167 .name = "lm87", 168 }, 169 .id = I2C_DRIVERID_LM87, 170 .attach_adapter = lm87_attach_adapter, 171 .detach_client = lm87_detach_client, 172 }; 173 174 /* 175 * Client data (each client gets its own) 176 */ 177 178 struct lm87_data { 179 struct i2c_client client; 180 struct device *hwmon_dev; 181 struct mutex update_lock; 182 char valid; /* zero until following fields are valid */ 183 unsigned long last_updated; /* In jiffies */ 184 185 u8 channel; /* register value */ 186 187 u8 in[8]; /* register value */ 188 u8 in_max[8]; /* register value */ 189 u8 in_min[8]; /* register value */ 190 u16 in_scale[8]; 191 192 s8 temp[3]; /* register value */ 193 s8 temp_high[3]; /* register value */ 194 s8 temp_low[3]; /* register value */ 195 s8 temp_crit_int; /* min of two register values */ 196 s8 temp_crit_ext; /* min of two register values */ 197 198 u8 fan[2]; /* register value */ 199 u8 fan_min[2]; /* register value */ 200 u8 fan_div[2]; /* register value, shifted right */ 201 u8 aout; /* register value */ 202 203 u16 alarms; /* register values, combined */ 204 u8 vid; /* register values, combined */ 205 u8 vrm; 206 }; 207 208 /* 209 * Sysfs stuff 210 */ 211 212 static inline int lm87_read_value(struct i2c_client *client, u8 reg) 213 { 214 return i2c_smbus_read_byte_data(client, reg); 215 } 216 217 static inline int lm87_write_value(struct i2c_client *client, u8 reg, u8 value) 218 { 219 return i2c_smbus_write_byte_data(client, reg, value); 220 } 221 222 #define show_in(offset) \ 223 static ssize_t show_in##offset##_input(struct device *dev, struct device_attribute *attr, char *buf) \ 224 { \ 225 struct lm87_data *data = lm87_update_device(dev); \ 226 return sprintf(buf, "%u\n", IN_FROM_REG(data->in[offset], \ 227 data->in_scale[offset])); \ 228 } \ 229 static ssize_t show_in##offset##_min(struct device *dev, struct device_attribute *attr, char *buf) \ 230 { \ 231 struct lm87_data *data = lm87_update_device(dev); \ 232 return sprintf(buf, "%u\n", IN_FROM_REG(data->in_min[offset], \ 233 data->in_scale[offset])); \ 234 } \ 235 static ssize_t show_in##offset##_max(struct device *dev, struct device_attribute *attr, char *buf) \ 236 { \ 237 struct lm87_data *data = lm87_update_device(dev); \ 238 return sprintf(buf, "%u\n", IN_FROM_REG(data->in_max[offset], \ 239 data->in_scale[offset])); \ 240 } \ 241 static DEVICE_ATTR(in##offset##_input, S_IRUGO, \ 242 show_in##offset##_input, NULL); 243 show_in(0); 244 show_in(1); 245 show_in(2); 246 show_in(3); 247 show_in(4); 248 show_in(5); 249 show_in(6); 250 show_in(7); 251 252 static void set_in_min(struct device *dev, const char *buf, int nr) 253 { 254 struct i2c_client *client = to_i2c_client(dev); 255 struct lm87_data *data = i2c_get_clientdata(client); 256 long val = simple_strtol(buf, NULL, 10); 257 258 mutex_lock(&data->update_lock); 259 data->in_min[nr] = IN_TO_REG(val, data->in_scale[nr]); 260 lm87_write_value(client, nr<6 ? LM87_REG_IN_MIN(nr) : 261 LM87_REG_AIN_MIN(nr-6), data->in_min[nr]); 262 mutex_unlock(&data->update_lock); 263 } 264 265 static void set_in_max(struct device *dev, const char *buf, int nr) 266 { 267 struct i2c_client *client = to_i2c_client(dev); 268 struct lm87_data *data = i2c_get_clientdata(client); 269 long val = simple_strtol(buf, NULL, 10); 270 271 mutex_lock(&data->update_lock); 272 data->in_max[nr] = IN_TO_REG(val, data->in_scale[nr]); 273 lm87_write_value(client, nr<6 ? LM87_REG_IN_MAX(nr) : 274 LM87_REG_AIN_MAX(nr-6), data->in_max[nr]); 275 mutex_unlock(&data->update_lock); 276 } 277 278 #define set_in(offset) \ 279 static ssize_t set_in##offset##_min(struct device *dev, struct device_attribute *attr, \ 280 const char *buf, size_t count) \ 281 { \ 282 set_in_min(dev, buf, offset); \ 283 return count; \ 284 } \ 285 static ssize_t set_in##offset##_max(struct device *dev, struct device_attribute *attr, \ 286 const char *buf, size_t count) \ 287 { \ 288 set_in_max(dev, buf, offset); \ 289 return count; \ 290 } \ 291 static DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \ 292 show_in##offset##_min, set_in##offset##_min); \ 293 static DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \ 294 show_in##offset##_max, set_in##offset##_max); 295 set_in(0); 296 set_in(1); 297 set_in(2); 298 set_in(3); 299 set_in(4); 300 set_in(5); 301 set_in(6); 302 set_in(7); 303 304 #define show_temp(offset) \ 305 static ssize_t show_temp##offset##_input(struct device *dev, struct device_attribute *attr, char *buf) \ 306 { \ 307 struct lm87_data *data = lm87_update_device(dev); \ 308 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[offset-1])); \ 309 } \ 310 static ssize_t show_temp##offset##_low(struct device *dev, struct device_attribute *attr, char *buf) \ 311 { \ 312 struct lm87_data *data = lm87_update_device(dev); \ 313 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_low[offset-1])); \ 314 } \ 315 static ssize_t show_temp##offset##_high(struct device *dev, struct device_attribute *attr, char *buf) \ 316 { \ 317 struct lm87_data *data = lm87_update_device(dev); \ 318 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_high[offset-1])); \ 319 }\ 320 static DEVICE_ATTR(temp##offset##_input, S_IRUGO, \ 321 show_temp##offset##_input, NULL); 322 show_temp(1); 323 show_temp(2); 324 show_temp(3); 325 326 static void set_temp_low(struct device *dev, const char *buf, int nr) 327 { 328 struct i2c_client *client = to_i2c_client(dev); 329 struct lm87_data *data = i2c_get_clientdata(client); 330 long val = simple_strtol(buf, NULL, 10); 331 332 mutex_lock(&data->update_lock); 333 data->temp_low[nr] = TEMP_TO_REG(val); 334 lm87_write_value(client, LM87_REG_TEMP_LOW[nr], data->temp_low[nr]); 335 mutex_unlock(&data->update_lock); 336 } 337 338 static void set_temp_high(struct device *dev, const char *buf, int nr) 339 { 340 struct i2c_client *client = to_i2c_client(dev); 341 struct lm87_data *data = i2c_get_clientdata(client); 342 long val = simple_strtol(buf, NULL, 10); 343 344 mutex_lock(&data->update_lock); 345 data->temp_high[nr] = TEMP_TO_REG(val); 346 lm87_write_value(client, LM87_REG_TEMP_HIGH[nr], data->temp_high[nr]); 347 mutex_unlock(&data->update_lock); 348 } 349 350 #define set_temp(offset) \ 351 static ssize_t set_temp##offset##_low(struct device *dev, struct device_attribute *attr, \ 352 const char *buf, size_t count) \ 353 { \ 354 set_temp_low(dev, buf, offset-1); \ 355 return count; \ 356 } \ 357 static ssize_t set_temp##offset##_high(struct device *dev, struct device_attribute *attr, \ 358 const char *buf, size_t count) \ 359 { \ 360 set_temp_high(dev, buf, offset-1); \ 361 return count; \ 362 } \ 363 static DEVICE_ATTR(temp##offset##_max, S_IRUGO | S_IWUSR, \ 364 show_temp##offset##_high, set_temp##offset##_high); \ 365 static DEVICE_ATTR(temp##offset##_min, S_IRUGO | S_IWUSR, \ 366 show_temp##offset##_low, set_temp##offset##_low); 367 set_temp(1); 368 set_temp(2); 369 set_temp(3); 370 371 static ssize_t show_temp_crit_int(struct device *dev, struct device_attribute *attr, char *buf) 372 { 373 struct lm87_data *data = lm87_update_device(dev); 374 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_crit_int)); 375 } 376 377 static ssize_t show_temp_crit_ext(struct device *dev, struct device_attribute *attr, char *buf) 378 { 379 struct lm87_data *data = lm87_update_device(dev); 380 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_crit_ext)); 381 } 382 383 static DEVICE_ATTR(temp1_crit, S_IRUGO, show_temp_crit_int, NULL); 384 static DEVICE_ATTR(temp2_crit, S_IRUGO, show_temp_crit_ext, NULL); 385 static DEVICE_ATTR(temp3_crit, S_IRUGO, show_temp_crit_ext, NULL); 386 387 #define show_fan(offset) \ 388 static ssize_t show_fan##offset##_input(struct device *dev, struct device_attribute *attr, char *buf) \ 389 { \ 390 struct lm87_data *data = lm87_update_device(dev); \ 391 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[offset-1], \ 392 FAN_DIV_FROM_REG(data->fan_div[offset-1]))); \ 393 } \ 394 static ssize_t show_fan##offset##_min(struct device *dev, struct device_attribute *attr, char *buf) \ 395 { \ 396 struct lm87_data *data = lm87_update_device(dev); \ 397 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[offset-1], \ 398 FAN_DIV_FROM_REG(data->fan_div[offset-1]))); \ 399 } \ 400 static ssize_t show_fan##offset##_div(struct device *dev, struct device_attribute *attr, char *buf) \ 401 { \ 402 struct lm87_data *data = lm87_update_device(dev); \ 403 return sprintf(buf, "%d\n", FAN_DIV_FROM_REG(data->fan_div[offset-1])); \ 404 } \ 405 static DEVICE_ATTR(fan##offset##_input, S_IRUGO, \ 406 show_fan##offset##_input, NULL); 407 show_fan(1); 408 show_fan(2); 409 410 static void set_fan_min(struct device *dev, const char *buf, int nr) 411 { 412 struct i2c_client *client = to_i2c_client(dev); 413 struct lm87_data *data = i2c_get_clientdata(client); 414 long val = simple_strtol(buf, NULL, 10); 415 416 mutex_lock(&data->update_lock); 417 data->fan_min[nr] = FAN_TO_REG(val, 418 FAN_DIV_FROM_REG(data->fan_div[nr])); 419 lm87_write_value(client, LM87_REG_FAN_MIN(nr), data->fan_min[nr]); 420 mutex_unlock(&data->update_lock); 421 } 422 423 /* Note: we save and restore the fan minimum here, because its value is 424 determined in part by the fan clock divider. This follows the principle 425 of least surprise; the user doesn't expect the fan minimum to change just 426 because the divider changed. */ 427 static ssize_t set_fan_div(struct device *dev, const char *buf, 428 size_t count, int nr) 429 { 430 struct i2c_client *client = to_i2c_client(dev); 431 struct lm87_data *data = i2c_get_clientdata(client); 432 long val = simple_strtol(buf, NULL, 10); 433 unsigned long min; 434 u8 reg; 435 436 mutex_lock(&data->update_lock); 437 min = FAN_FROM_REG(data->fan_min[nr], 438 FAN_DIV_FROM_REG(data->fan_div[nr])); 439 440 switch (val) { 441 case 1: data->fan_div[nr] = 0; break; 442 case 2: data->fan_div[nr] = 1; break; 443 case 4: data->fan_div[nr] = 2; break; 444 case 8: data->fan_div[nr] = 3; break; 445 default: 446 mutex_unlock(&data->update_lock); 447 return -EINVAL; 448 } 449 450 reg = lm87_read_value(client, LM87_REG_VID_FAN_DIV); 451 switch (nr) { 452 case 0: 453 reg = (reg & 0xCF) | (data->fan_div[0] << 4); 454 break; 455 case 1: 456 reg = (reg & 0x3F) | (data->fan_div[1] << 6); 457 break; 458 } 459 lm87_write_value(client, LM87_REG_VID_FAN_DIV, reg); 460 461 data->fan_min[nr] = FAN_TO_REG(min, val); 462 lm87_write_value(client, LM87_REG_FAN_MIN(nr), 463 data->fan_min[nr]); 464 mutex_unlock(&data->update_lock); 465 466 return count; 467 } 468 469 #define set_fan(offset) \ 470 static ssize_t set_fan##offset##_min(struct device *dev, struct device_attribute *attr, const char *buf, \ 471 size_t count) \ 472 { \ 473 set_fan_min(dev, buf, offset-1); \ 474 return count; \ 475 } \ 476 static ssize_t set_fan##offset##_div(struct device *dev, struct device_attribute *attr, const char *buf, \ 477 size_t count) \ 478 { \ 479 return set_fan_div(dev, buf, count, offset-1); \ 480 } \ 481 static DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \ 482 show_fan##offset##_min, set_fan##offset##_min); \ 483 static DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR, \ 484 show_fan##offset##_div, set_fan##offset##_div); 485 set_fan(1); 486 set_fan(2); 487 488 static ssize_t show_alarms(struct device *dev, struct device_attribute *attr, char *buf) 489 { 490 struct lm87_data *data = lm87_update_device(dev); 491 return sprintf(buf, "%d\n", data->alarms); 492 } 493 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL); 494 495 static ssize_t show_vid(struct device *dev, struct device_attribute *attr, char *buf) 496 { 497 struct lm87_data *data = lm87_update_device(dev); 498 return sprintf(buf, "%d\n", vid_from_reg(data->vid, data->vrm)); 499 } 500 static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid, NULL); 501 502 static ssize_t show_vrm(struct device *dev, struct device_attribute *attr, char *buf) 503 { 504 struct lm87_data *data = dev_get_drvdata(dev); 505 return sprintf(buf, "%d\n", data->vrm); 506 } 507 static ssize_t set_vrm(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) 508 { 509 struct i2c_client *client = to_i2c_client(dev); 510 struct lm87_data *data = i2c_get_clientdata(client); 511 data->vrm = simple_strtoul(buf, NULL, 10); 512 return count; 513 } 514 static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm, set_vrm); 515 516 static ssize_t show_aout(struct device *dev, struct device_attribute *attr, char *buf) 517 { 518 struct lm87_data *data = lm87_update_device(dev); 519 return sprintf(buf, "%d\n", AOUT_FROM_REG(data->aout)); 520 } 521 static ssize_t set_aout(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) 522 { 523 struct i2c_client *client = to_i2c_client(dev); 524 struct lm87_data *data = i2c_get_clientdata(client); 525 long val = simple_strtol(buf, NULL, 10); 526 527 mutex_lock(&data->update_lock); 528 data->aout = AOUT_TO_REG(val); 529 lm87_write_value(client, LM87_REG_AOUT, data->aout); 530 mutex_unlock(&data->update_lock); 531 return count; 532 } 533 static DEVICE_ATTR(aout_output, S_IRUGO | S_IWUSR, show_aout, set_aout); 534 535 static ssize_t show_alarm(struct device *dev, struct device_attribute *attr, 536 char *buf) 537 { 538 struct lm87_data *data = lm87_update_device(dev); 539 int bitnr = to_sensor_dev_attr(attr)->index; 540 return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1); 541 } 542 static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0); 543 static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 1); 544 static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 2); 545 static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 3); 546 static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 8); 547 static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 9); 548 static SENSOR_DEVICE_ATTR(in6_alarm, S_IRUGO, show_alarm, NULL, 6); 549 static SENSOR_DEVICE_ATTR(in7_alarm, S_IRUGO, show_alarm, NULL, 7); 550 static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 4); 551 static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 5); 552 static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL, 5); 553 static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 6); 554 static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 7); 555 static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_alarm, NULL, 14); 556 static SENSOR_DEVICE_ATTR(temp3_fault, S_IRUGO, show_alarm, NULL, 15); 557 558 /* 559 * Real code 560 */ 561 562 static int lm87_attach_adapter(struct i2c_adapter *adapter) 563 { 564 if (!(adapter->class & I2C_CLASS_HWMON)) 565 return 0; 566 return i2c_probe(adapter, &addr_data, lm87_detect); 567 } 568 569 static struct attribute *lm87_attributes[] = { 570 &dev_attr_in1_input.attr, 571 &dev_attr_in1_min.attr, 572 &dev_attr_in1_max.attr, 573 &sensor_dev_attr_in1_alarm.dev_attr.attr, 574 &dev_attr_in2_input.attr, 575 &dev_attr_in2_min.attr, 576 &dev_attr_in2_max.attr, 577 &sensor_dev_attr_in2_alarm.dev_attr.attr, 578 &dev_attr_in3_input.attr, 579 &dev_attr_in3_min.attr, 580 &dev_attr_in3_max.attr, 581 &sensor_dev_attr_in3_alarm.dev_attr.attr, 582 &dev_attr_in4_input.attr, 583 &dev_attr_in4_min.attr, 584 &dev_attr_in4_max.attr, 585 &sensor_dev_attr_in4_alarm.dev_attr.attr, 586 587 &dev_attr_temp1_input.attr, 588 &dev_attr_temp1_max.attr, 589 &dev_attr_temp1_min.attr, 590 &dev_attr_temp1_crit.attr, 591 &sensor_dev_attr_temp1_alarm.dev_attr.attr, 592 &dev_attr_temp2_input.attr, 593 &dev_attr_temp2_max.attr, 594 &dev_attr_temp2_min.attr, 595 &dev_attr_temp2_crit.attr, 596 &sensor_dev_attr_temp2_alarm.dev_attr.attr, 597 &sensor_dev_attr_temp2_fault.dev_attr.attr, 598 599 &dev_attr_alarms.attr, 600 &dev_attr_aout_output.attr, 601 602 NULL 603 }; 604 605 static const struct attribute_group lm87_group = { 606 .attrs = lm87_attributes, 607 }; 608 609 static struct attribute *lm87_attributes_opt[] = { 610 &dev_attr_in6_input.attr, 611 &dev_attr_in6_min.attr, 612 &dev_attr_in6_max.attr, 613 &sensor_dev_attr_in6_alarm.dev_attr.attr, 614 615 &dev_attr_fan1_input.attr, 616 &dev_attr_fan1_min.attr, 617 &dev_attr_fan1_div.attr, 618 &sensor_dev_attr_fan1_alarm.dev_attr.attr, 619 620 &dev_attr_in7_input.attr, 621 &dev_attr_in7_min.attr, 622 &dev_attr_in7_max.attr, 623 &sensor_dev_attr_in7_alarm.dev_attr.attr, 624 625 &dev_attr_fan2_input.attr, 626 &dev_attr_fan2_min.attr, 627 &dev_attr_fan2_div.attr, 628 &sensor_dev_attr_fan2_alarm.dev_attr.attr, 629 630 &dev_attr_temp3_input.attr, 631 &dev_attr_temp3_max.attr, 632 &dev_attr_temp3_min.attr, 633 &dev_attr_temp3_crit.attr, 634 &sensor_dev_attr_temp3_alarm.dev_attr.attr, 635 &sensor_dev_attr_temp3_fault.dev_attr.attr, 636 637 &dev_attr_in0_input.attr, 638 &dev_attr_in0_min.attr, 639 &dev_attr_in0_max.attr, 640 &sensor_dev_attr_in0_alarm.dev_attr.attr, 641 &dev_attr_in5_input.attr, 642 &dev_attr_in5_min.attr, 643 &dev_attr_in5_max.attr, 644 &sensor_dev_attr_in5_alarm.dev_attr.attr, 645 646 &dev_attr_cpu0_vid.attr, 647 &dev_attr_vrm.attr, 648 649 NULL 650 }; 651 652 static const struct attribute_group lm87_group_opt = { 653 .attrs = lm87_attributes_opt, 654 }; 655 656 /* 657 * The following function does more than just detection. If detection 658 * succeeds, it also registers the new chip. 659 */ 660 static int lm87_detect(struct i2c_adapter *adapter, int address, int kind) 661 { 662 struct i2c_client *new_client; 663 struct lm87_data *data; 664 int err = 0; 665 666 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) 667 goto exit; 668 669 if (!(data = kzalloc(sizeof(struct lm87_data), GFP_KERNEL))) { 670 err = -ENOMEM; 671 goto exit; 672 } 673 674 /* The common I2C client data is placed right before the 675 LM87-specific data. */ 676 new_client = &data->client; 677 i2c_set_clientdata(new_client, data); 678 new_client->addr = address; 679 new_client->adapter = adapter; 680 new_client->driver = &lm87_driver; 681 new_client->flags = 0; 682 683 /* Default to an LM87 if forced */ 684 if (kind == 0) 685 kind = lm87; 686 687 /* Now, we do the remaining detection. */ 688 if (kind < 0) { 689 u8 rev = lm87_read_value(new_client, LM87_REG_REVISION); 690 691 if (rev < 0x01 || rev > 0x08 692 || (lm87_read_value(new_client, LM87_REG_CONFIG) & 0x80) 693 || lm87_read_value(new_client, LM87_REG_COMPANY_ID) != 0x02) { 694 dev_dbg(&adapter->dev, 695 "LM87 detection failed at 0x%02x.\n", 696 address); 697 goto exit_free; 698 } 699 } 700 701 /* We can fill in the remaining client fields */ 702 strlcpy(new_client->name, "lm87", I2C_NAME_SIZE); 703 data->valid = 0; 704 mutex_init(&data->update_lock); 705 706 /* Tell the I2C layer a new client has arrived */ 707 if ((err = i2c_attach_client(new_client))) 708 goto exit_free; 709 710 /* Initialize the LM87 chip */ 711 lm87_init_client(new_client); 712 713 data->in_scale[0] = 2500; 714 data->in_scale[1] = 2700; 715 data->in_scale[2] = (data->channel & CHAN_VCC_5V) ? 5000 : 3300; 716 data->in_scale[3] = 5000; 717 data->in_scale[4] = 12000; 718 data->in_scale[5] = 2700; 719 data->in_scale[6] = 1875; 720 data->in_scale[7] = 1875; 721 722 /* Register sysfs hooks */ 723 if ((err = sysfs_create_group(&new_client->dev.kobj, &lm87_group))) 724 goto exit_detach; 725 726 if (data->channel & CHAN_NO_FAN(0)) { 727 if ((err = device_create_file(&new_client->dev, 728 &dev_attr_in6_input)) 729 || (err = device_create_file(&new_client->dev, 730 &dev_attr_in6_min)) 731 || (err = device_create_file(&new_client->dev, 732 &dev_attr_in6_max)) 733 || (err = device_create_file(&new_client->dev, 734 &sensor_dev_attr_in6_alarm.dev_attr))) 735 goto exit_remove; 736 } else { 737 if ((err = device_create_file(&new_client->dev, 738 &dev_attr_fan1_input)) 739 || (err = device_create_file(&new_client->dev, 740 &dev_attr_fan1_min)) 741 || (err = device_create_file(&new_client->dev, 742 &dev_attr_fan1_div)) 743 || (err = device_create_file(&new_client->dev, 744 &sensor_dev_attr_fan1_alarm.dev_attr))) 745 goto exit_remove; 746 } 747 748 if (data->channel & CHAN_NO_FAN(1)) { 749 if ((err = device_create_file(&new_client->dev, 750 &dev_attr_in7_input)) 751 || (err = device_create_file(&new_client->dev, 752 &dev_attr_in7_min)) 753 || (err = device_create_file(&new_client->dev, 754 &dev_attr_in7_max)) 755 || (err = device_create_file(&new_client->dev, 756 &sensor_dev_attr_in7_alarm.dev_attr))) 757 goto exit_remove; 758 } else { 759 if ((err = device_create_file(&new_client->dev, 760 &dev_attr_fan2_input)) 761 || (err = device_create_file(&new_client->dev, 762 &dev_attr_fan2_min)) 763 || (err = device_create_file(&new_client->dev, 764 &dev_attr_fan2_div)) 765 || (err = device_create_file(&new_client->dev, 766 &sensor_dev_attr_fan2_alarm.dev_attr))) 767 goto exit_remove; 768 } 769 770 if (data->channel & CHAN_TEMP3) { 771 if ((err = device_create_file(&new_client->dev, 772 &dev_attr_temp3_input)) 773 || (err = device_create_file(&new_client->dev, 774 &dev_attr_temp3_max)) 775 || (err = device_create_file(&new_client->dev, 776 &dev_attr_temp3_min)) 777 || (err = device_create_file(&new_client->dev, 778 &dev_attr_temp3_crit)) 779 || (err = device_create_file(&new_client->dev, 780 &sensor_dev_attr_temp3_alarm.dev_attr)) 781 || (err = device_create_file(&new_client->dev, 782 &sensor_dev_attr_temp3_fault.dev_attr))) 783 goto exit_remove; 784 } else { 785 if ((err = device_create_file(&new_client->dev, 786 &dev_attr_in0_input)) 787 || (err = device_create_file(&new_client->dev, 788 &dev_attr_in0_min)) 789 || (err = device_create_file(&new_client->dev, 790 &dev_attr_in0_max)) 791 || (err = device_create_file(&new_client->dev, 792 &sensor_dev_attr_in0_alarm.dev_attr)) 793 || (err = device_create_file(&new_client->dev, 794 &dev_attr_in5_input)) 795 || (err = device_create_file(&new_client->dev, 796 &dev_attr_in5_min)) 797 || (err = device_create_file(&new_client->dev, 798 &dev_attr_in5_max)) 799 || (err = device_create_file(&new_client->dev, 800 &sensor_dev_attr_in5_alarm.dev_attr))) 801 goto exit_remove; 802 } 803 804 if (!(data->channel & CHAN_NO_VID)) { 805 data->vrm = vid_which_vrm(); 806 if ((err = device_create_file(&new_client->dev, 807 &dev_attr_cpu0_vid)) 808 || (err = device_create_file(&new_client->dev, 809 &dev_attr_vrm))) 810 goto exit_remove; 811 } 812 813 data->hwmon_dev = hwmon_device_register(&new_client->dev); 814 if (IS_ERR(data->hwmon_dev)) { 815 err = PTR_ERR(data->hwmon_dev); 816 goto exit_remove; 817 } 818 819 return 0; 820 821 exit_remove: 822 sysfs_remove_group(&new_client->dev.kobj, &lm87_group); 823 sysfs_remove_group(&new_client->dev.kobj, &lm87_group_opt); 824 exit_detach: 825 i2c_detach_client(new_client); 826 exit_free: 827 kfree(data); 828 exit: 829 return err; 830 } 831 832 static void lm87_init_client(struct i2c_client *client) 833 { 834 struct lm87_data *data = i2c_get_clientdata(client); 835 u8 config; 836 837 data->channel = lm87_read_value(client, LM87_REG_CHANNEL_MODE); 838 839 config = lm87_read_value(client, LM87_REG_CONFIG); 840 if (!(config & 0x01)) { 841 int i; 842 843 /* Limits are left uninitialized after power-up */ 844 for (i = 1; i < 6; i++) { 845 lm87_write_value(client, LM87_REG_IN_MIN(i), 0x00); 846 lm87_write_value(client, LM87_REG_IN_MAX(i), 0xFF); 847 } 848 for (i = 0; i < 2; i++) { 849 lm87_write_value(client, LM87_REG_TEMP_HIGH[i], 0x7F); 850 lm87_write_value(client, LM87_REG_TEMP_LOW[i], 0x00); 851 lm87_write_value(client, LM87_REG_AIN_MIN(i), 0x00); 852 lm87_write_value(client, LM87_REG_AIN_MAX(i), 0xFF); 853 } 854 if (data->channel & CHAN_TEMP3) { 855 lm87_write_value(client, LM87_REG_TEMP_HIGH[2], 0x7F); 856 lm87_write_value(client, LM87_REG_TEMP_LOW[2], 0x00); 857 } else { 858 lm87_write_value(client, LM87_REG_IN_MIN(0), 0x00); 859 lm87_write_value(client, LM87_REG_IN_MAX(0), 0xFF); 860 } 861 } 862 if ((config & 0x81) != 0x01) { 863 /* Start monitoring */ 864 lm87_write_value(client, LM87_REG_CONFIG, 865 (config & 0xF7) | 0x01); 866 } 867 } 868 869 static int lm87_detach_client(struct i2c_client *client) 870 { 871 struct lm87_data *data = i2c_get_clientdata(client); 872 int err; 873 874 hwmon_device_unregister(data->hwmon_dev); 875 sysfs_remove_group(&client->dev.kobj, &lm87_group); 876 sysfs_remove_group(&client->dev.kobj, &lm87_group_opt); 877 878 if ((err = i2c_detach_client(client))) 879 return err; 880 881 kfree(data); 882 return 0; 883 } 884 885 static struct lm87_data *lm87_update_device(struct device *dev) 886 { 887 struct i2c_client *client = to_i2c_client(dev); 888 struct lm87_data *data = i2c_get_clientdata(client); 889 890 mutex_lock(&data->update_lock); 891 892 if (time_after(jiffies, data->last_updated + HZ) || !data->valid) { 893 int i, j; 894 895 dev_dbg(&client->dev, "Updating data.\n"); 896 897 i = (data->channel & CHAN_TEMP3) ? 1 : 0; 898 j = (data->channel & CHAN_TEMP3) ? 5 : 6; 899 for (; i < j; i++) { 900 data->in[i] = lm87_read_value(client, 901 LM87_REG_IN(i)); 902 data->in_min[i] = lm87_read_value(client, 903 LM87_REG_IN_MIN(i)); 904 data->in_max[i] = lm87_read_value(client, 905 LM87_REG_IN_MAX(i)); 906 } 907 908 for (i = 0; i < 2; i++) { 909 if (data->channel & CHAN_NO_FAN(i)) { 910 data->in[6+i] = lm87_read_value(client, 911 LM87_REG_AIN(i)); 912 data->in_max[6+i] = lm87_read_value(client, 913 LM87_REG_AIN_MAX(i)); 914 data->in_min[6+i] = lm87_read_value(client, 915 LM87_REG_AIN_MIN(i)); 916 917 } else { 918 data->fan[i] = lm87_read_value(client, 919 LM87_REG_FAN(i)); 920 data->fan_min[i] = lm87_read_value(client, 921 LM87_REG_FAN_MIN(i)); 922 } 923 } 924 925 j = (data->channel & CHAN_TEMP3) ? 3 : 2; 926 for (i = 0 ; i < j; i++) { 927 data->temp[i] = lm87_read_value(client, 928 LM87_REG_TEMP[i]); 929 data->temp_high[i] = lm87_read_value(client, 930 LM87_REG_TEMP_HIGH[i]); 931 data->temp_low[i] = lm87_read_value(client, 932 LM87_REG_TEMP_LOW[i]); 933 } 934 935 i = lm87_read_value(client, LM87_REG_TEMP_HW_INT_LOCK); 936 j = lm87_read_value(client, LM87_REG_TEMP_HW_INT); 937 data->temp_crit_int = min(i, j); 938 939 i = lm87_read_value(client, LM87_REG_TEMP_HW_EXT_LOCK); 940 j = lm87_read_value(client, LM87_REG_TEMP_HW_EXT); 941 data->temp_crit_ext = min(i, j); 942 943 i = lm87_read_value(client, LM87_REG_VID_FAN_DIV); 944 data->fan_div[0] = (i >> 4) & 0x03; 945 data->fan_div[1] = (i >> 6) & 0x03; 946 data->vid = (i & 0x0F) 947 | (lm87_read_value(client, LM87_REG_VID4) & 0x01) 948 << 4; 949 950 data->alarms = lm87_read_value(client, LM87_REG_ALARMS1) 951 | (lm87_read_value(client, LM87_REG_ALARMS2) 952 << 8); 953 data->aout = lm87_read_value(client, LM87_REG_AOUT); 954 955 data->last_updated = jiffies; 956 data->valid = 1; 957 } 958 959 mutex_unlock(&data->update_lock); 960 961 return data; 962 } 963 964 static int __init sensors_lm87_init(void) 965 { 966 return i2c_add_driver(&lm87_driver); 967 } 968 969 static void __exit sensors_lm87_exit(void) 970 { 971 i2c_del_driver(&lm87_driver); 972 } 973 974 MODULE_AUTHOR("Jean Delvare <khali@linux-fr.org> and others"); 975 MODULE_DESCRIPTION("LM87 driver"); 976 MODULE_LICENSE("GPL"); 977 978 module_init(sensors_lm87_init); 979 module_exit(sensors_lm87_exit); 980