1 /* 2 * adm9240.c Part of lm_sensors, Linux kernel modules for hardware 3 * monitoring 4 * 5 * Copyright (C) 1999 Frodo Looijaard <frodol@dds.nl> 6 * Philip Edelbrock <phil@netroedge.com> 7 * Copyright (C) 2003 Michiel Rook <michiel@grendelproject.nl> 8 * Copyright (C) 2005 Grant Coady <gcoady.lk@gmail.com> with valuable 9 * guidance from Jean Delvare 10 * 11 * Driver supports Analog Devices ADM9240 12 * Dallas Semiconductor DS1780 13 * National Semiconductor LM81 14 * 15 * ADM9240 is the reference, DS1780 and LM81 are register compatibles 16 * 17 * Voltage Six inputs are scaled by chip, VID also reported 18 * Temperature Chip temperature to 0.5'C, maximum and max_hysteris 19 * Fans 2 fans, low speed alarm, automatic fan clock divider 20 * Alarms 16-bit map of active alarms 21 * Analog Out 0..1250 mV output 22 * 23 * Chassis Intrusion: clear CI latch with 'echo 0 > intrusion0_alarm' 24 * 25 * Test hardware: Intel SE440BX-2 desktop motherboard --Grant 26 * 27 * LM81 extended temp reading not implemented 28 * 29 * This program is free software; you can redistribute it and/or modify 30 * it under the terms of the GNU General Public License as published by 31 * the Free Software Foundation; either version 2 of the License, or 32 * (at your option) any later version. 33 * 34 * This program is distributed in the hope that it will be useful, 35 * but WITHOUT ANY WARRANTY; without even the implied warranty of 36 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 37 * GNU General Public License for more details. 38 * 39 * You should have received a copy of the GNU General Public License 40 * along with this program; if not, write to the Free Software 41 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 42 */ 43 44 #include <linux/init.h> 45 #include <linux/module.h> 46 #include <linux/slab.h> 47 #include <linux/i2c.h> 48 #include <linux/hwmon-sysfs.h> 49 #include <linux/hwmon.h> 50 #include <linux/hwmon-vid.h> 51 #include <linux/err.h> 52 #include <linux/mutex.h> 53 #include <linux/jiffies.h> 54 55 /* Addresses to scan */ 56 static const unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, 0x2f, 57 I2C_CLIENT_END }; 58 59 enum chips { adm9240, ds1780, lm81 }; 60 61 /* ADM9240 registers */ 62 #define ADM9240_REG_MAN_ID 0x3e 63 #define ADM9240_REG_DIE_REV 0x3f 64 #define ADM9240_REG_CONFIG 0x40 65 66 #define ADM9240_REG_IN(nr) (0x20 + (nr)) /* 0..5 */ 67 #define ADM9240_REG_IN_MAX(nr) (0x2b + (nr) * 2) 68 #define ADM9240_REG_IN_MIN(nr) (0x2c + (nr) * 2) 69 #define ADM9240_REG_FAN(nr) (0x28 + (nr)) /* 0..1 */ 70 #define ADM9240_REG_FAN_MIN(nr) (0x3b + (nr)) 71 #define ADM9240_REG_INT(nr) (0x41 + (nr)) 72 #define ADM9240_REG_INT_MASK(nr) (0x43 + (nr)) 73 #define ADM9240_REG_TEMP 0x27 74 #define ADM9240_REG_TEMP_MAX(nr) (0x39 + (nr)) /* 0, 1 = high, hyst */ 75 #define ADM9240_REG_ANALOG_OUT 0x19 76 #define ADM9240_REG_CHASSIS_CLEAR 0x46 77 #define ADM9240_REG_VID_FAN_DIV 0x47 78 #define ADM9240_REG_I2C_ADDR 0x48 79 #define ADM9240_REG_VID4 0x49 80 #define ADM9240_REG_TEMP_CONF 0x4b 81 82 /* generalised scaling with integer rounding */ 83 static inline int SCALE(long val, int mul, int div) 84 { 85 if (val < 0) 86 return (val * mul - div / 2) / div; 87 else 88 return (val * mul + div / 2) / div; 89 } 90 91 /* adm9240 internally scales voltage measurements */ 92 static const u16 nom_mv[] = { 2500, 2700, 3300, 5000, 12000, 2700 }; 93 94 static inline unsigned int IN_FROM_REG(u8 reg, int n) 95 { 96 return SCALE(reg, nom_mv[n], 192); 97 } 98 99 static inline u8 IN_TO_REG(unsigned long val, int n) 100 { 101 return clamp_val(SCALE(val, 192, nom_mv[n]), 0, 255); 102 } 103 104 /* temperature range: -40..125, 127 disables temperature alarm */ 105 static inline s8 TEMP_TO_REG(long val) 106 { 107 return clamp_val(SCALE(val, 1, 1000), -40, 127); 108 } 109 110 /* two fans, each with low fan speed limit */ 111 static inline unsigned int FAN_FROM_REG(u8 reg, u8 div) 112 { 113 if (!reg) /* error */ 114 return -1; 115 116 if (reg == 255) 117 return 0; 118 119 return SCALE(1350000, 1, reg * div); 120 } 121 122 /* analog out 0..1250mV */ 123 static inline u8 AOUT_TO_REG(unsigned long val) 124 { 125 return clamp_val(SCALE(val, 255, 1250), 0, 255); 126 } 127 128 static inline unsigned int AOUT_FROM_REG(u8 reg) 129 { 130 return SCALE(reg, 1250, 255); 131 } 132 133 /* per client data */ 134 struct adm9240_data { 135 struct i2c_client *client; 136 struct mutex update_lock; 137 char valid; 138 unsigned long last_updated_measure; 139 unsigned long last_updated_config; 140 141 u8 in[6]; /* ro in0_input */ 142 u8 in_max[6]; /* rw in0_max */ 143 u8 in_min[6]; /* rw in0_min */ 144 u8 fan[2]; /* ro fan1_input */ 145 u8 fan_min[2]; /* rw fan1_min */ 146 u8 fan_div[2]; /* rw fan1_div, read-only accessor */ 147 s16 temp; /* ro temp1_input, 9-bit sign-extended */ 148 s8 temp_max[2]; /* rw 0 -> temp_max, 1 -> temp_max_hyst */ 149 u16 alarms; /* ro alarms */ 150 u8 aout; /* rw aout_output */ 151 u8 vid; /* ro vid */ 152 u8 vrm; /* -- vrm set on startup, no accessor */ 153 }; 154 155 /* write new fan div, callers must hold data->update_lock */ 156 static void adm9240_write_fan_div(struct i2c_client *client, int nr, 157 u8 fan_div) 158 { 159 u8 reg, old, shift = (nr + 2) * 2; 160 161 reg = i2c_smbus_read_byte_data(client, ADM9240_REG_VID_FAN_DIV); 162 old = (reg >> shift) & 3; 163 reg &= ~(3 << shift); 164 reg |= (fan_div << shift); 165 i2c_smbus_write_byte_data(client, ADM9240_REG_VID_FAN_DIV, reg); 166 dev_dbg(&client->dev, 167 "fan%d clock divider changed from %u to %u\n", 168 nr + 1, 1 << old, 1 << fan_div); 169 } 170 171 static struct adm9240_data *adm9240_update_device(struct device *dev) 172 { 173 struct adm9240_data *data = dev_get_drvdata(dev); 174 struct i2c_client *client = data->client; 175 int i; 176 177 mutex_lock(&data->update_lock); 178 179 /* minimum measurement cycle: 1.75 seconds */ 180 if (time_after(jiffies, data->last_updated_measure + (HZ * 7 / 4)) 181 || !data->valid) { 182 183 for (i = 0; i < 6; i++) { /* read voltages */ 184 data->in[i] = i2c_smbus_read_byte_data(client, 185 ADM9240_REG_IN(i)); 186 } 187 data->alarms = i2c_smbus_read_byte_data(client, 188 ADM9240_REG_INT(0)) | 189 i2c_smbus_read_byte_data(client, 190 ADM9240_REG_INT(1)) << 8; 191 192 /* 193 * read temperature: assume temperature changes less than 194 * 0.5'C per two measurement cycles thus ignore possible 195 * but unlikely aliasing error on lsb reading. --Grant 196 */ 197 data->temp = ((i2c_smbus_read_byte_data(client, 198 ADM9240_REG_TEMP) << 8) | 199 i2c_smbus_read_byte_data(client, 200 ADM9240_REG_TEMP_CONF)) / 128; 201 202 for (i = 0; i < 2; i++) { /* read fans */ 203 data->fan[i] = i2c_smbus_read_byte_data(client, 204 ADM9240_REG_FAN(i)); 205 206 /* adjust fan clock divider on overflow */ 207 if (data->valid && data->fan[i] == 255 && 208 data->fan_div[i] < 3) { 209 210 adm9240_write_fan_div(client, i, 211 ++data->fan_div[i]); 212 213 /* adjust fan_min if active, but not to 0 */ 214 if (data->fan_min[i] < 255 && 215 data->fan_min[i] >= 2) 216 data->fan_min[i] /= 2; 217 } 218 } 219 data->last_updated_measure = jiffies; 220 } 221 222 /* minimum config reading cycle: 300 seconds */ 223 if (time_after(jiffies, data->last_updated_config + (HZ * 300)) 224 || !data->valid) { 225 226 for (i = 0; i < 6; i++) { 227 data->in_min[i] = i2c_smbus_read_byte_data(client, 228 ADM9240_REG_IN_MIN(i)); 229 data->in_max[i] = i2c_smbus_read_byte_data(client, 230 ADM9240_REG_IN_MAX(i)); 231 } 232 for (i = 0; i < 2; i++) { 233 data->fan_min[i] = i2c_smbus_read_byte_data(client, 234 ADM9240_REG_FAN_MIN(i)); 235 } 236 data->temp_max[0] = i2c_smbus_read_byte_data(client, 237 ADM9240_REG_TEMP_MAX(0)); 238 data->temp_max[1] = i2c_smbus_read_byte_data(client, 239 ADM9240_REG_TEMP_MAX(1)); 240 241 /* read fan divs and 5-bit VID */ 242 i = i2c_smbus_read_byte_data(client, ADM9240_REG_VID_FAN_DIV); 243 data->fan_div[0] = (i >> 4) & 3; 244 data->fan_div[1] = (i >> 6) & 3; 245 data->vid = i & 0x0f; 246 data->vid |= (i2c_smbus_read_byte_data(client, 247 ADM9240_REG_VID4) & 1) << 4; 248 /* read analog out */ 249 data->aout = i2c_smbus_read_byte_data(client, 250 ADM9240_REG_ANALOG_OUT); 251 252 data->last_updated_config = jiffies; 253 data->valid = 1; 254 } 255 mutex_unlock(&data->update_lock); 256 return data; 257 } 258 259 /*** sysfs accessors ***/ 260 261 /* temperature */ 262 static ssize_t show_temp(struct device *dev, struct device_attribute *dummy, 263 char *buf) 264 { 265 struct adm9240_data *data = adm9240_update_device(dev); 266 return sprintf(buf, "%d\n", data->temp * 500); /* 9-bit value */ 267 } 268 269 static ssize_t show_max(struct device *dev, struct device_attribute *devattr, 270 char *buf) 271 { 272 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 273 struct adm9240_data *data = adm9240_update_device(dev); 274 return sprintf(buf, "%d\n", data->temp_max[attr->index] * 1000); 275 } 276 277 static ssize_t set_max(struct device *dev, struct device_attribute *devattr, 278 const char *buf, size_t count) 279 { 280 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 281 struct adm9240_data *data = dev_get_drvdata(dev); 282 struct i2c_client *client = data->client; 283 long val; 284 int err; 285 286 err = kstrtol(buf, 10, &val); 287 if (err) 288 return err; 289 290 mutex_lock(&data->update_lock); 291 data->temp_max[attr->index] = TEMP_TO_REG(val); 292 i2c_smbus_write_byte_data(client, ADM9240_REG_TEMP_MAX(attr->index), 293 data->temp_max[attr->index]); 294 mutex_unlock(&data->update_lock); 295 return count; 296 } 297 298 static DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL); 299 static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, 300 show_max, set_max, 0); 301 static SENSOR_DEVICE_ATTR(temp1_max_hyst, S_IWUSR | S_IRUGO, 302 show_max, set_max, 1); 303 304 /* voltage */ 305 static ssize_t show_in(struct device *dev, struct device_attribute *devattr, 306 char *buf) 307 { 308 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 309 struct adm9240_data *data = adm9240_update_device(dev); 310 return sprintf(buf, "%d\n", IN_FROM_REG(data->in[attr->index], 311 attr->index)); 312 } 313 314 static ssize_t show_in_min(struct device *dev, 315 struct device_attribute *devattr, char *buf) 316 { 317 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 318 struct adm9240_data *data = adm9240_update_device(dev); 319 return sprintf(buf, "%d\n", IN_FROM_REG(data->in_min[attr->index], 320 attr->index)); 321 } 322 323 static ssize_t show_in_max(struct device *dev, 324 struct device_attribute *devattr, char *buf) 325 { 326 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 327 struct adm9240_data *data = adm9240_update_device(dev); 328 return sprintf(buf, "%d\n", IN_FROM_REG(data->in_max[attr->index], 329 attr->index)); 330 } 331 332 static ssize_t set_in_min(struct device *dev, 333 struct device_attribute *devattr, 334 const char *buf, size_t count) 335 { 336 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 337 struct adm9240_data *data = dev_get_drvdata(dev); 338 struct i2c_client *client = data->client; 339 unsigned long val; 340 int err; 341 342 err = kstrtoul(buf, 10, &val); 343 if (err) 344 return err; 345 346 mutex_lock(&data->update_lock); 347 data->in_min[attr->index] = IN_TO_REG(val, attr->index); 348 i2c_smbus_write_byte_data(client, ADM9240_REG_IN_MIN(attr->index), 349 data->in_min[attr->index]); 350 mutex_unlock(&data->update_lock); 351 return count; 352 } 353 354 static ssize_t set_in_max(struct device *dev, 355 struct device_attribute *devattr, 356 const char *buf, size_t count) 357 { 358 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 359 struct adm9240_data *data = dev_get_drvdata(dev); 360 struct i2c_client *client = data->client; 361 unsigned long val; 362 int err; 363 364 err = kstrtoul(buf, 10, &val); 365 if (err) 366 return err; 367 368 mutex_lock(&data->update_lock); 369 data->in_max[attr->index] = IN_TO_REG(val, attr->index); 370 i2c_smbus_write_byte_data(client, ADM9240_REG_IN_MAX(attr->index), 371 data->in_max[attr->index]); 372 mutex_unlock(&data->update_lock); 373 return count; 374 } 375 376 #define vin(nr) \ 377 static SENSOR_DEVICE_ATTR(in##nr##_input, S_IRUGO, \ 378 show_in, NULL, nr); \ 379 static SENSOR_DEVICE_ATTR(in##nr##_min, S_IRUGO | S_IWUSR, \ 380 show_in_min, set_in_min, nr); \ 381 static SENSOR_DEVICE_ATTR(in##nr##_max, S_IRUGO | S_IWUSR, \ 382 show_in_max, set_in_max, nr); 383 384 vin(0); 385 vin(1); 386 vin(2); 387 vin(3); 388 vin(4); 389 vin(5); 390 391 /* fans */ 392 static ssize_t show_fan(struct device *dev, 393 struct device_attribute *devattr, char *buf) 394 { 395 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 396 struct adm9240_data *data = adm9240_update_device(dev); 397 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[attr->index], 398 1 << data->fan_div[attr->index])); 399 } 400 401 static ssize_t show_fan_min(struct device *dev, 402 struct device_attribute *devattr, char *buf) 403 { 404 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 405 struct adm9240_data *data = adm9240_update_device(dev); 406 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[attr->index], 407 1 << data->fan_div[attr->index])); 408 } 409 410 static ssize_t show_fan_div(struct device *dev, 411 struct device_attribute *devattr, char *buf) 412 { 413 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 414 struct adm9240_data *data = adm9240_update_device(dev); 415 return sprintf(buf, "%d\n", 1 << data->fan_div[attr->index]); 416 } 417 418 /* 419 * set fan speed low limit: 420 * 421 * - value is zero: disable fan speed low limit alarm 422 * 423 * - value is below fan speed measurement range: enable fan speed low 424 * limit alarm to be asserted while fan speed too slow to measure 425 * 426 * - otherwise: select fan clock divider to suit fan speed low limit, 427 * measurement code may adjust registers to ensure fan speed reading 428 */ 429 static ssize_t set_fan_min(struct device *dev, 430 struct device_attribute *devattr, 431 const char *buf, size_t count) 432 { 433 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 434 struct adm9240_data *data = dev_get_drvdata(dev); 435 struct i2c_client *client = data->client; 436 int nr = attr->index; 437 u8 new_div; 438 unsigned long val; 439 int err; 440 441 err = kstrtoul(buf, 10, &val); 442 if (err) 443 return err; 444 445 mutex_lock(&data->update_lock); 446 447 if (!val) { 448 data->fan_min[nr] = 255; 449 new_div = data->fan_div[nr]; 450 451 dev_dbg(&client->dev, "fan%u low limit set disabled\n", 452 nr + 1); 453 454 } else if (val < 1350000 / (8 * 254)) { 455 new_div = 3; 456 data->fan_min[nr] = 254; 457 458 dev_dbg(&client->dev, "fan%u low limit set minimum %u\n", 459 nr + 1, FAN_FROM_REG(254, 1 << new_div)); 460 461 } else { 462 unsigned int new_min = 1350000 / val; 463 464 new_div = 0; 465 while (new_min > 192 && new_div < 3) { 466 new_div++; 467 new_min /= 2; 468 } 469 if (!new_min) /* keep > 0 */ 470 new_min++; 471 472 data->fan_min[nr] = new_min; 473 474 dev_dbg(&client->dev, "fan%u low limit set fan speed %u\n", 475 nr + 1, FAN_FROM_REG(new_min, 1 << new_div)); 476 } 477 478 if (new_div != data->fan_div[nr]) { 479 data->fan_div[nr] = new_div; 480 adm9240_write_fan_div(client, nr, new_div); 481 } 482 i2c_smbus_write_byte_data(client, ADM9240_REG_FAN_MIN(nr), 483 data->fan_min[nr]); 484 485 mutex_unlock(&data->update_lock); 486 return count; 487 } 488 489 #define fan(nr) \ 490 static SENSOR_DEVICE_ATTR(fan##nr##_input, S_IRUGO, \ 491 show_fan, NULL, nr - 1); \ 492 static SENSOR_DEVICE_ATTR(fan##nr##_div, S_IRUGO, \ 493 show_fan_div, NULL, nr - 1); \ 494 static SENSOR_DEVICE_ATTR(fan##nr##_min, S_IRUGO | S_IWUSR, \ 495 show_fan_min, set_fan_min, nr - 1); 496 497 fan(1); 498 fan(2); 499 500 /* alarms */ 501 static ssize_t show_alarms(struct device *dev, 502 struct device_attribute *attr, char *buf) 503 { 504 struct adm9240_data *data = adm9240_update_device(dev); 505 return sprintf(buf, "%u\n", data->alarms); 506 } 507 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL); 508 509 static ssize_t show_alarm(struct device *dev, 510 struct device_attribute *attr, char *buf) 511 { 512 int bitnr = to_sensor_dev_attr(attr)->index; 513 struct adm9240_data *data = adm9240_update_device(dev); 514 return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1); 515 } 516 static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0); 517 static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 1); 518 static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 2); 519 static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 3); 520 static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 8); 521 static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 9); 522 static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 4); 523 static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 6); 524 static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 7); 525 526 /* vid */ 527 static ssize_t show_vid(struct device *dev, 528 struct device_attribute *attr, char *buf) 529 { 530 struct adm9240_data *data = adm9240_update_device(dev); 531 return sprintf(buf, "%d\n", vid_from_reg(data->vid, data->vrm)); 532 } 533 static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid, NULL); 534 535 /* analog output */ 536 static ssize_t show_aout(struct device *dev, 537 struct device_attribute *attr, char *buf) 538 { 539 struct adm9240_data *data = adm9240_update_device(dev); 540 return sprintf(buf, "%d\n", AOUT_FROM_REG(data->aout)); 541 } 542 543 static ssize_t set_aout(struct device *dev, 544 struct device_attribute *attr, 545 const char *buf, size_t count) 546 { 547 struct adm9240_data *data = dev_get_drvdata(dev); 548 struct i2c_client *client = data->client; 549 long val; 550 int err; 551 552 err = kstrtol(buf, 10, &val); 553 if (err) 554 return err; 555 556 mutex_lock(&data->update_lock); 557 data->aout = AOUT_TO_REG(val); 558 i2c_smbus_write_byte_data(client, ADM9240_REG_ANALOG_OUT, data->aout); 559 mutex_unlock(&data->update_lock); 560 return count; 561 } 562 static DEVICE_ATTR(aout_output, S_IRUGO | S_IWUSR, show_aout, set_aout); 563 564 static ssize_t chassis_clear(struct device *dev, 565 struct device_attribute *attr, 566 const char *buf, size_t count) 567 { 568 struct adm9240_data *data = dev_get_drvdata(dev); 569 struct i2c_client *client = data->client; 570 unsigned long val; 571 572 if (kstrtoul(buf, 10, &val) || val != 0) 573 return -EINVAL; 574 575 mutex_lock(&data->update_lock); 576 i2c_smbus_write_byte_data(client, ADM9240_REG_CHASSIS_CLEAR, 0x80); 577 data->valid = 0; /* Force cache refresh */ 578 mutex_unlock(&data->update_lock); 579 dev_dbg(&client->dev, "chassis intrusion latch cleared\n"); 580 581 return count; 582 } 583 static SENSOR_DEVICE_ATTR(intrusion0_alarm, S_IRUGO | S_IWUSR, show_alarm, 584 chassis_clear, 12); 585 586 static struct attribute *adm9240_attrs[] = { 587 &sensor_dev_attr_in0_input.dev_attr.attr, 588 &sensor_dev_attr_in0_min.dev_attr.attr, 589 &sensor_dev_attr_in0_max.dev_attr.attr, 590 &sensor_dev_attr_in0_alarm.dev_attr.attr, 591 &sensor_dev_attr_in1_input.dev_attr.attr, 592 &sensor_dev_attr_in1_min.dev_attr.attr, 593 &sensor_dev_attr_in1_max.dev_attr.attr, 594 &sensor_dev_attr_in1_alarm.dev_attr.attr, 595 &sensor_dev_attr_in2_input.dev_attr.attr, 596 &sensor_dev_attr_in2_min.dev_attr.attr, 597 &sensor_dev_attr_in2_max.dev_attr.attr, 598 &sensor_dev_attr_in2_alarm.dev_attr.attr, 599 &sensor_dev_attr_in3_input.dev_attr.attr, 600 &sensor_dev_attr_in3_min.dev_attr.attr, 601 &sensor_dev_attr_in3_max.dev_attr.attr, 602 &sensor_dev_attr_in3_alarm.dev_attr.attr, 603 &sensor_dev_attr_in4_input.dev_attr.attr, 604 &sensor_dev_attr_in4_min.dev_attr.attr, 605 &sensor_dev_attr_in4_max.dev_attr.attr, 606 &sensor_dev_attr_in4_alarm.dev_attr.attr, 607 &sensor_dev_attr_in5_input.dev_attr.attr, 608 &sensor_dev_attr_in5_min.dev_attr.attr, 609 &sensor_dev_attr_in5_max.dev_attr.attr, 610 &sensor_dev_attr_in5_alarm.dev_attr.attr, 611 &dev_attr_temp1_input.attr, 612 &sensor_dev_attr_temp1_max.dev_attr.attr, 613 &sensor_dev_attr_temp1_max_hyst.dev_attr.attr, 614 &sensor_dev_attr_temp1_alarm.dev_attr.attr, 615 &sensor_dev_attr_fan1_input.dev_attr.attr, 616 &sensor_dev_attr_fan1_div.dev_attr.attr, 617 &sensor_dev_attr_fan1_min.dev_attr.attr, 618 &sensor_dev_attr_fan1_alarm.dev_attr.attr, 619 &sensor_dev_attr_fan2_input.dev_attr.attr, 620 &sensor_dev_attr_fan2_div.dev_attr.attr, 621 &sensor_dev_attr_fan2_min.dev_attr.attr, 622 &sensor_dev_attr_fan2_alarm.dev_attr.attr, 623 &dev_attr_alarms.attr, 624 &dev_attr_aout_output.attr, 625 &sensor_dev_attr_intrusion0_alarm.dev_attr.attr, 626 &dev_attr_cpu0_vid.attr, 627 NULL 628 }; 629 630 ATTRIBUTE_GROUPS(adm9240); 631 632 633 /*** sensor chip detect and driver install ***/ 634 635 /* Return 0 if detection is successful, -ENODEV otherwise */ 636 static int adm9240_detect(struct i2c_client *new_client, 637 struct i2c_board_info *info) 638 { 639 struct i2c_adapter *adapter = new_client->adapter; 640 const char *name = ""; 641 int address = new_client->addr; 642 u8 man_id, die_rev; 643 644 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) 645 return -ENODEV; 646 647 /* verify chip: reg address should match i2c address */ 648 if (i2c_smbus_read_byte_data(new_client, ADM9240_REG_I2C_ADDR) 649 != address) { 650 dev_err(&adapter->dev, "detect fail: address match, 0x%02x\n", 651 address); 652 return -ENODEV; 653 } 654 655 /* check known chip manufacturer */ 656 man_id = i2c_smbus_read_byte_data(new_client, ADM9240_REG_MAN_ID); 657 if (man_id == 0x23) { 658 name = "adm9240"; 659 } else if (man_id == 0xda) { 660 name = "ds1780"; 661 } else if (man_id == 0x01) { 662 name = "lm81"; 663 } else { 664 dev_err(&adapter->dev, "detect fail: unknown manuf, 0x%02x\n", 665 man_id); 666 return -ENODEV; 667 } 668 669 /* successful detect, print chip info */ 670 die_rev = i2c_smbus_read_byte_data(new_client, ADM9240_REG_DIE_REV); 671 dev_info(&adapter->dev, "found %s revision %u\n", 672 man_id == 0x23 ? "ADM9240" : 673 man_id == 0xda ? "DS1780" : "LM81", die_rev); 674 675 strlcpy(info->type, name, I2C_NAME_SIZE); 676 677 return 0; 678 } 679 680 static void adm9240_init_client(struct i2c_client *client) 681 { 682 struct adm9240_data *data = i2c_get_clientdata(client); 683 u8 conf = i2c_smbus_read_byte_data(client, ADM9240_REG_CONFIG); 684 u8 mode = i2c_smbus_read_byte_data(client, ADM9240_REG_TEMP_CONF) & 3; 685 686 data->vrm = vid_which_vrm(); /* need this to report vid as mV */ 687 688 dev_info(&client->dev, "Using VRM: %d.%d\n", data->vrm / 10, 689 data->vrm % 10); 690 691 if (conf & 1) { /* measurement cycle running: report state */ 692 693 dev_info(&client->dev, "status: config 0x%02x mode %u\n", 694 conf, mode); 695 696 } else { /* cold start: open limits before starting chip */ 697 int i; 698 699 for (i = 0; i < 6; i++) { 700 i2c_smbus_write_byte_data(client, 701 ADM9240_REG_IN_MIN(i), 0); 702 i2c_smbus_write_byte_data(client, 703 ADM9240_REG_IN_MAX(i), 255); 704 } 705 i2c_smbus_write_byte_data(client, 706 ADM9240_REG_FAN_MIN(0), 255); 707 i2c_smbus_write_byte_data(client, 708 ADM9240_REG_FAN_MIN(1), 255); 709 i2c_smbus_write_byte_data(client, 710 ADM9240_REG_TEMP_MAX(0), 127); 711 i2c_smbus_write_byte_data(client, 712 ADM9240_REG_TEMP_MAX(1), 127); 713 714 /* start measurement cycle */ 715 i2c_smbus_write_byte_data(client, ADM9240_REG_CONFIG, 1); 716 717 dev_info(&client->dev, 718 "cold start: config was 0x%02x mode %u\n", conf, mode); 719 } 720 } 721 722 static int adm9240_probe(struct i2c_client *new_client, 723 const struct i2c_device_id *id) 724 { 725 struct device *dev = &new_client->dev; 726 struct device *hwmon_dev; 727 struct adm9240_data *data; 728 729 data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL); 730 if (!data) 731 return -ENOMEM; 732 733 i2c_set_clientdata(new_client, data); 734 data->client = new_client; 735 mutex_init(&data->update_lock); 736 737 adm9240_init_client(new_client); 738 739 hwmon_dev = devm_hwmon_device_register_with_groups(dev, 740 new_client->name, 741 data, 742 adm9240_groups); 743 return PTR_ERR_OR_ZERO(hwmon_dev); 744 } 745 746 static const struct i2c_device_id adm9240_id[] = { 747 { "adm9240", adm9240 }, 748 { "ds1780", ds1780 }, 749 { "lm81", lm81 }, 750 { } 751 }; 752 MODULE_DEVICE_TABLE(i2c, adm9240_id); 753 754 static struct i2c_driver adm9240_driver = { 755 .class = I2C_CLASS_HWMON, 756 .driver = { 757 .name = "adm9240", 758 }, 759 .probe = adm9240_probe, 760 .id_table = adm9240_id, 761 .detect = adm9240_detect, 762 .address_list = normal_i2c, 763 }; 764 765 module_i2c_driver(adm9240_driver); 766 767 MODULE_AUTHOR("Michiel Rook <michiel@grendelproject.nl>, " 768 "Grant Coady <gcoady.lk@gmail.com> and others"); 769 MODULE_DESCRIPTION("ADM9240/DS1780/LM81 driver"); 770 MODULE_LICENSE("GPL"); 771