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 val = clamp_val(val, 0, nom_mv[n] * 255 / 192); 102 return SCALE(val, 192, nom_mv[n]); 103 } 104 105 /* temperature range: -40..125, 127 disables temperature alarm */ 106 static inline s8 TEMP_TO_REG(long val) 107 { 108 val = clamp_val(val, -40000, 127000); 109 return SCALE(val, 1, 1000); 110 } 111 112 /* two fans, each with low fan speed limit */ 113 static inline unsigned int FAN_FROM_REG(u8 reg, u8 div) 114 { 115 if (!reg) /* error */ 116 return -1; 117 118 if (reg == 255) 119 return 0; 120 121 return SCALE(1350000, 1, reg * div); 122 } 123 124 /* analog out 0..1250mV */ 125 static inline u8 AOUT_TO_REG(unsigned long val) 126 { 127 val = clamp_val(val, 0, 1250); 128 return SCALE(val, 255, 1250); 129 } 130 131 static inline unsigned int AOUT_FROM_REG(u8 reg) 132 { 133 return SCALE(reg, 1250, 255); 134 } 135 136 /* per client data */ 137 struct adm9240_data { 138 struct i2c_client *client; 139 struct mutex update_lock; 140 char valid; 141 unsigned long last_updated_measure; 142 unsigned long last_updated_config; 143 144 u8 in[6]; /* ro in0_input */ 145 u8 in_max[6]; /* rw in0_max */ 146 u8 in_min[6]; /* rw in0_min */ 147 u8 fan[2]; /* ro fan1_input */ 148 u8 fan_min[2]; /* rw fan1_min */ 149 u8 fan_div[2]; /* rw fan1_div, read-only accessor */ 150 s16 temp; /* ro temp1_input, 9-bit sign-extended */ 151 s8 temp_max[2]; /* rw 0 -> temp_max, 1 -> temp_max_hyst */ 152 u16 alarms; /* ro alarms */ 153 u8 aout; /* rw aout_output */ 154 u8 vid; /* ro vid */ 155 u8 vrm; /* -- vrm set on startup, no accessor */ 156 }; 157 158 /* write new fan div, callers must hold data->update_lock */ 159 static void adm9240_write_fan_div(struct i2c_client *client, int nr, 160 u8 fan_div) 161 { 162 u8 reg, old, shift = (nr + 2) * 2; 163 164 reg = i2c_smbus_read_byte_data(client, ADM9240_REG_VID_FAN_DIV); 165 old = (reg >> shift) & 3; 166 reg &= ~(3 << shift); 167 reg |= (fan_div << shift); 168 i2c_smbus_write_byte_data(client, ADM9240_REG_VID_FAN_DIV, reg); 169 dev_dbg(&client->dev, 170 "fan%d clock divider changed from %u to %u\n", 171 nr + 1, 1 << old, 1 << fan_div); 172 } 173 174 static struct adm9240_data *adm9240_update_device(struct device *dev) 175 { 176 struct adm9240_data *data = dev_get_drvdata(dev); 177 struct i2c_client *client = data->client; 178 int i; 179 180 mutex_lock(&data->update_lock); 181 182 /* minimum measurement cycle: 1.75 seconds */ 183 if (time_after(jiffies, data->last_updated_measure + (HZ * 7 / 4)) 184 || !data->valid) { 185 186 for (i = 0; i < 6; i++) { /* read voltages */ 187 data->in[i] = i2c_smbus_read_byte_data(client, 188 ADM9240_REG_IN(i)); 189 } 190 data->alarms = i2c_smbus_read_byte_data(client, 191 ADM9240_REG_INT(0)) | 192 i2c_smbus_read_byte_data(client, 193 ADM9240_REG_INT(1)) << 8; 194 195 /* 196 * read temperature: assume temperature changes less than 197 * 0.5'C per two measurement cycles thus ignore possible 198 * but unlikely aliasing error on lsb reading. --Grant 199 */ 200 data->temp = (i2c_smbus_read_byte_data(client, 201 ADM9240_REG_TEMP) << 8) | 202 i2c_smbus_read_byte_data(client, 203 ADM9240_REG_TEMP_CONF); 204 205 for (i = 0; i < 2; i++) { /* read fans */ 206 data->fan[i] = i2c_smbus_read_byte_data(client, 207 ADM9240_REG_FAN(i)); 208 209 /* adjust fan clock divider on overflow */ 210 if (data->valid && data->fan[i] == 255 && 211 data->fan_div[i] < 3) { 212 213 adm9240_write_fan_div(client, i, 214 ++data->fan_div[i]); 215 216 /* adjust fan_min if active, but not to 0 */ 217 if (data->fan_min[i] < 255 && 218 data->fan_min[i] >= 2) 219 data->fan_min[i] /= 2; 220 } 221 } 222 data->last_updated_measure = jiffies; 223 } 224 225 /* minimum config reading cycle: 300 seconds */ 226 if (time_after(jiffies, data->last_updated_config + (HZ * 300)) 227 || !data->valid) { 228 229 for (i = 0; i < 6; i++) { 230 data->in_min[i] = i2c_smbus_read_byte_data(client, 231 ADM9240_REG_IN_MIN(i)); 232 data->in_max[i] = i2c_smbus_read_byte_data(client, 233 ADM9240_REG_IN_MAX(i)); 234 } 235 for (i = 0; i < 2; i++) { 236 data->fan_min[i] = i2c_smbus_read_byte_data(client, 237 ADM9240_REG_FAN_MIN(i)); 238 } 239 data->temp_max[0] = i2c_smbus_read_byte_data(client, 240 ADM9240_REG_TEMP_MAX(0)); 241 data->temp_max[1] = i2c_smbus_read_byte_data(client, 242 ADM9240_REG_TEMP_MAX(1)); 243 244 /* read fan divs and 5-bit VID */ 245 i = i2c_smbus_read_byte_data(client, ADM9240_REG_VID_FAN_DIV); 246 data->fan_div[0] = (i >> 4) & 3; 247 data->fan_div[1] = (i >> 6) & 3; 248 data->vid = i & 0x0f; 249 data->vid |= (i2c_smbus_read_byte_data(client, 250 ADM9240_REG_VID4) & 1) << 4; 251 /* read analog out */ 252 data->aout = i2c_smbus_read_byte_data(client, 253 ADM9240_REG_ANALOG_OUT); 254 255 data->last_updated_config = jiffies; 256 data->valid = 1; 257 } 258 mutex_unlock(&data->update_lock); 259 return data; 260 } 261 262 /*** sysfs accessors ***/ 263 264 /* temperature */ 265 static ssize_t temp1_input_show(struct device *dev, 266 struct device_attribute *dummy, char *buf) 267 { 268 struct adm9240_data *data = adm9240_update_device(dev); 269 return sprintf(buf, "%d\n", data->temp / 128 * 500); /* 9-bit value */ 270 } 271 272 static ssize_t show_max(struct device *dev, struct device_attribute *devattr, 273 char *buf) 274 { 275 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 276 struct adm9240_data *data = adm9240_update_device(dev); 277 return sprintf(buf, "%d\n", data->temp_max[attr->index] * 1000); 278 } 279 280 static ssize_t set_max(struct device *dev, struct device_attribute *devattr, 281 const char *buf, size_t count) 282 { 283 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 284 struct adm9240_data *data = dev_get_drvdata(dev); 285 struct i2c_client *client = data->client; 286 long val; 287 int err; 288 289 err = kstrtol(buf, 10, &val); 290 if (err) 291 return err; 292 293 mutex_lock(&data->update_lock); 294 data->temp_max[attr->index] = TEMP_TO_REG(val); 295 i2c_smbus_write_byte_data(client, ADM9240_REG_TEMP_MAX(attr->index), 296 data->temp_max[attr->index]); 297 mutex_unlock(&data->update_lock); 298 return count; 299 } 300 301 static DEVICE_ATTR_RO(temp1_input); 302 static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, 303 show_max, set_max, 0); 304 static SENSOR_DEVICE_ATTR(temp1_max_hyst, S_IWUSR | S_IRUGO, 305 show_max, set_max, 1); 306 307 /* voltage */ 308 static ssize_t show_in(struct device *dev, struct device_attribute *devattr, 309 char *buf) 310 { 311 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 312 struct adm9240_data *data = adm9240_update_device(dev); 313 return sprintf(buf, "%d\n", IN_FROM_REG(data->in[attr->index], 314 attr->index)); 315 } 316 317 static ssize_t show_in_min(struct device *dev, 318 struct device_attribute *devattr, char *buf) 319 { 320 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 321 struct adm9240_data *data = adm9240_update_device(dev); 322 return sprintf(buf, "%d\n", IN_FROM_REG(data->in_min[attr->index], 323 attr->index)); 324 } 325 326 static ssize_t show_in_max(struct device *dev, 327 struct device_attribute *devattr, char *buf) 328 { 329 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 330 struct adm9240_data *data = adm9240_update_device(dev); 331 return sprintf(buf, "%d\n", IN_FROM_REG(data->in_max[attr->index], 332 attr->index)); 333 } 334 335 static ssize_t set_in_min(struct device *dev, 336 struct device_attribute *devattr, 337 const char *buf, size_t count) 338 { 339 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 340 struct adm9240_data *data = dev_get_drvdata(dev); 341 struct i2c_client *client = data->client; 342 unsigned long val; 343 int err; 344 345 err = kstrtoul(buf, 10, &val); 346 if (err) 347 return err; 348 349 mutex_lock(&data->update_lock); 350 data->in_min[attr->index] = IN_TO_REG(val, attr->index); 351 i2c_smbus_write_byte_data(client, ADM9240_REG_IN_MIN(attr->index), 352 data->in_min[attr->index]); 353 mutex_unlock(&data->update_lock); 354 return count; 355 } 356 357 static ssize_t set_in_max(struct device *dev, 358 struct device_attribute *devattr, 359 const char *buf, size_t count) 360 { 361 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 362 struct adm9240_data *data = dev_get_drvdata(dev); 363 struct i2c_client *client = data->client; 364 unsigned long val; 365 int err; 366 367 err = kstrtoul(buf, 10, &val); 368 if (err) 369 return err; 370 371 mutex_lock(&data->update_lock); 372 data->in_max[attr->index] = IN_TO_REG(val, attr->index); 373 i2c_smbus_write_byte_data(client, ADM9240_REG_IN_MAX(attr->index), 374 data->in_max[attr->index]); 375 mutex_unlock(&data->update_lock); 376 return count; 377 } 378 379 #define vin(nr) \ 380 static SENSOR_DEVICE_ATTR(in##nr##_input, S_IRUGO, \ 381 show_in, NULL, nr); \ 382 static SENSOR_DEVICE_ATTR(in##nr##_min, S_IRUGO | S_IWUSR, \ 383 show_in_min, set_in_min, nr); \ 384 static SENSOR_DEVICE_ATTR(in##nr##_max, S_IRUGO | S_IWUSR, \ 385 show_in_max, set_in_max, nr); 386 387 vin(0); 388 vin(1); 389 vin(2); 390 vin(3); 391 vin(4); 392 vin(5); 393 394 /* fans */ 395 static ssize_t show_fan(struct device *dev, 396 struct device_attribute *devattr, char *buf) 397 { 398 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 399 struct adm9240_data *data = adm9240_update_device(dev); 400 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[attr->index], 401 1 << data->fan_div[attr->index])); 402 } 403 404 static ssize_t show_fan_min(struct device *dev, 405 struct device_attribute *devattr, char *buf) 406 { 407 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 408 struct adm9240_data *data = adm9240_update_device(dev); 409 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[attr->index], 410 1 << data->fan_div[attr->index])); 411 } 412 413 static ssize_t show_fan_div(struct device *dev, 414 struct device_attribute *devattr, char *buf) 415 { 416 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 417 struct adm9240_data *data = adm9240_update_device(dev); 418 return sprintf(buf, "%d\n", 1 << data->fan_div[attr->index]); 419 } 420 421 /* 422 * set fan speed low limit: 423 * 424 * - value is zero: disable fan speed low limit alarm 425 * 426 * - value is below fan speed measurement range: enable fan speed low 427 * limit alarm to be asserted while fan speed too slow to measure 428 * 429 * - otherwise: select fan clock divider to suit fan speed low limit, 430 * measurement code may adjust registers to ensure fan speed reading 431 */ 432 static ssize_t set_fan_min(struct device *dev, 433 struct device_attribute *devattr, 434 const char *buf, size_t count) 435 { 436 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 437 struct adm9240_data *data = dev_get_drvdata(dev); 438 struct i2c_client *client = data->client; 439 int nr = attr->index; 440 u8 new_div; 441 unsigned long val; 442 int err; 443 444 err = kstrtoul(buf, 10, &val); 445 if (err) 446 return err; 447 448 mutex_lock(&data->update_lock); 449 450 if (!val) { 451 data->fan_min[nr] = 255; 452 new_div = data->fan_div[nr]; 453 454 dev_dbg(&client->dev, "fan%u low limit set disabled\n", 455 nr + 1); 456 457 } else if (val < 1350000 / (8 * 254)) { 458 new_div = 3; 459 data->fan_min[nr] = 254; 460 461 dev_dbg(&client->dev, "fan%u low limit set minimum %u\n", 462 nr + 1, FAN_FROM_REG(254, 1 << new_div)); 463 464 } else { 465 unsigned int new_min = 1350000 / val; 466 467 new_div = 0; 468 while (new_min > 192 && new_div < 3) { 469 new_div++; 470 new_min /= 2; 471 } 472 if (!new_min) /* keep > 0 */ 473 new_min++; 474 475 data->fan_min[nr] = new_min; 476 477 dev_dbg(&client->dev, "fan%u low limit set fan speed %u\n", 478 nr + 1, FAN_FROM_REG(new_min, 1 << new_div)); 479 } 480 481 if (new_div != data->fan_div[nr]) { 482 data->fan_div[nr] = new_div; 483 adm9240_write_fan_div(client, nr, new_div); 484 } 485 i2c_smbus_write_byte_data(client, ADM9240_REG_FAN_MIN(nr), 486 data->fan_min[nr]); 487 488 mutex_unlock(&data->update_lock); 489 return count; 490 } 491 492 #define fan(nr) \ 493 static SENSOR_DEVICE_ATTR(fan##nr##_input, S_IRUGO, \ 494 show_fan, NULL, nr - 1); \ 495 static SENSOR_DEVICE_ATTR(fan##nr##_div, S_IRUGO, \ 496 show_fan_div, NULL, nr - 1); \ 497 static SENSOR_DEVICE_ATTR(fan##nr##_min, S_IRUGO | S_IWUSR, \ 498 show_fan_min, set_fan_min, nr - 1); 499 500 fan(1); 501 fan(2); 502 503 /* alarms */ 504 static ssize_t alarms_show(struct device *dev, 505 struct device_attribute *attr, char *buf) 506 { 507 struct adm9240_data *data = adm9240_update_device(dev); 508 return sprintf(buf, "%u\n", data->alarms); 509 } 510 static DEVICE_ATTR_RO(alarms); 511 512 static ssize_t show_alarm(struct device *dev, 513 struct device_attribute *attr, char *buf) 514 { 515 int bitnr = to_sensor_dev_attr(attr)->index; 516 struct adm9240_data *data = adm9240_update_device(dev); 517 return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1); 518 } 519 static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0); 520 static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 1); 521 static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 2); 522 static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 3); 523 static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 8); 524 static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 9); 525 static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 4); 526 static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 6); 527 static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 7); 528 529 /* vid */ 530 static ssize_t cpu0_vid_show(struct device *dev, 531 struct device_attribute *attr, char *buf) 532 { 533 struct adm9240_data *data = adm9240_update_device(dev); 534 return sprintf(buf, "%d\n", vid_from_reg(data->vid, data->vrm)); 535 } 536 static DEVICE_ATTR_RO(cpu0_vid); 537 538 /* analog output */ 539 static ssize_t aout_output_show(struct device *dev, 540 struct device_attribute *attr, char *buf) 541 { 542 struct adm9240_data *data = adm9240_update_device(dev); 543 return sprintf(buf, "%d\n", AOUT_FROM_REG(data->aout)); 544 } 545 546 static ssize_t aout_output_store(struct device *dev, 547 struct device_attribute *attr, 548 const char *buf, size_t count) 549 { 550 struct adm9240_data *data = dev_get_drvdata(dev); 551 struct i2c_client *client = data->client; 552 long val; 553 int err; 554 555 err = kstrtol(buf, 10, &val); 556 if (err) 557 return err; 558 559 mutex_lock(&data->update_lock); 560 data->aout = AOUT_TO_REG(val); 561 i2c_smbus_write_byte_data(client, ADM9240_REG_ANALOG_OUT, data->aout); 562 mutex_unlock(&data->update_lock); 563 return count; 564 } 565 static DEVICE_ATTR_RW(aout_output); 566 567 static ssize_t chassis_clear(struct device *dev, 568 struct device_attribute *attr, 569 const char *buf, size_t count) 570 { 571 struct adm9240_data *data = dev_get_drvdata(dev); 572 struct i2c_client *client = data->client; 573 unsigned long val; 574 575 if (kstrtoul(buf, 10, &val) || val != 0) 576 return -EINVAL; 577 578 mutex_lock(&data->update_lock); 579 i2c_smbus_write_byte_data(client, ADM9240_REG_CHASSIS_CLEAR, 0x80); 580 data->valid = 0; /* Force cache refresh */ 581 mutex_unlock(&data->update_lock); 582 dev_dbg(&client->dev, "chassis intrusion latch cleared\n"); 583 584 return count; 585 } 586 static SENSOR_DEVICE_ATTR(intrusion0_alarm, S_IRUGO | S_IWUSR, show_alarm, 587 chassis_clear, 12); 588 589 static struct attribute *adm9240_attrs[] = { 590 &sensor_dev_attr_in0_input.dev_attr.attr, 591 &sensor_dev_attr_in0_min.dev_attr.attr, 592 &sensor_dev_attr_in0_max.dev_attr.attr, 593 &sensor_dev_attr_in0_alarm.dev_attr.attr, 594 &sensor_dev_attr_in1_input.dev_attr.attr, 595 &sensor_dev_attr_in1_min.dev_attr.attr, 596 &sensor_dev_attr_in1_max.dev_attr.attr, 597 &sensor_dev_attr_in1_alarm.dev_attr.attr, 598 &sensor_dev_attr_in2_input.dev_attr.attr, 599 &sensor_dev_attr_in2_min.dev_attr.attr, 600 &sensor_dev_attr_in2_max.dev_attr.attr, 601 &sensor_dev_attr_in2_alarm.dev_attr.attr, 602 &sensor_dev_attr_in3_input.dev_attr.attr, 603 &sensor_dev_attr_in3_min.dev_attr.attr, 604 &sensor_dev_attr_in3_max.dev_attr.attr, 605 &sensor_dev_attr_in3_alarm.dev_attr.attr, 606 &sensor_dev_attr_in4_input.dev_attr.attr, 607 &sensor_dev_attr_in4_min.dev_attr.attr, 608 &sensor_dev_attr_in4_max.dev_attr.attr, 609 &sensor_dev_attr_in4_alarm.dev_attr.attr, 610 &sensor_dev_attr_in5_input.dev_attr.attr, 611 &sensor_dev_attr_in5_min.dev_attr.attr, 612 &sensor_dev_attr_in5_max.dev_attr.attr, 613 &sensor_dev_attr_in5_alarm.dev_attr.attr, 614 &dev_attr_temp1_input.attr, 615 &sensor_dev_attr_temp1_max.dev_attr.attr, 616 &sensor_dev_attr_temp1_max_hyst.dev_attr.attr, 617 &sensor_dev_attr_temp1_alarm.dev_attr.attr, 618 &sensor_dev_attr_fan1_input.dev_attr.attr, 619 &sensor_dev_attr_fan1_div.dev_attr.attr, 620 &sensor_dev_attr_fan1_min.dev_attr.attr, 621 &sensor_dev_attr_fan1_alarm.dev_attr.attr, 622 &sensor_dev_attr_fan2_input.dev_attr.attr, 623 &sensor_dev_attr_fan2_div.dev_attr.attr, 624 &sensor_dev_attr_fan2_min.dev_attr.attr, 625 &sensor_dev_attr_fan2_alarm.dev_attr.attr, 626 &dev_attr_alarms.attr, 627 &dev_attr_aout_output.attr, 628 &sensor_dev_attr_intrusion0_alarm.dev_attr.attr, 629 &dev_attr_cpu0_vid.attr, 630 NULL 631 }; 632 633 ATTRIBUTE_GROUPS(adm9240); 634 635 636 /*** sensor chip detect and driver install ***/ 637 638 /* Return 0 if detection is successful, -ENODEV otherwise */ 639 static int adm9240_detect(struct i2c_client *new_client, 640 struct i2c_board_info *info) 641 { 642 struct i2c_adapter *adapter = new_client->adapter; 643 const char *name = ""; 644 int address = new_client->addr; 645 u8 man_id, die_rev; 646 647 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) 648 return -ENODEV; 649 650 /* verify chip: reg address should match i2c address */ 651 if (i2c_smbus_read_byte_data(new_client, ADM9240_REG_I2C_ADDR) 652 != address) { 653 dev_err(&adapter->dev, "detect fail: address match, 0x%02x\n", 654 address); 655 return -ENODEV; 656 } 657 658 /* check known chip manufacturer */ 659 man_id = i2c_smbus_read_byte_data(new_client, ADM9240_REG_MAN_ID); 660 if (man_id == 0x23) { 661 name = "adm9240"; 662 } else if (man_id == 0xda) { 663 name = "ds1780"; 664 } else if (man_id == 0x01) { 665 name = "lm81"; 666 } else { 667 dev_err(&adapter->dev, "detect fail: unknown manuf, 0x%02x\n", 668 man_id); 669 return -ENODEV; 670 } 671 672 /* successful detect, print chip info */ 673 die_rev = i2c_smbus_read_byte_data(new_client, ADM9240_REG_DIE_REV); 674 dev_info(&adapter->dev, "found %s revision %u\n", 675 man_id == 0x23 ? "ADM9240" : 676 man_id == 0xda ? "DS1780" : "LM81", die_rev); 677 678 strlcpy(info->type, name, I2C_NAME_SIZE); 679 680 return 0; 681 } 682 683 static void adm9240_init_client(struct i2c_client *client) 684 { 685 struct adm9240_data *data = i2c_get_clientdata(client); 686 u8 conf = i2c_smbus_read_byte_data(client, ADM9240_REG_CONFIG); 687 u8 mode = i2c_smbus_read_byte_data(client, ADM9240_REG_TEMP_CONF) & 3; 688 689 data->vrm = vid_which_vrm(); /* need this to report vid as mV */ 690 691 dev_info(&client->dev, "Using VRM: %d.%d\n", data->vrm / 10, 692 data->vrm % 10); 693 694 if (conf & 1) { /* measurement cycle running: report state */ 695 696 dev_info(&client->dev, "status: config 0x%02x mode %u\n", 697 conf, mode); 698 699 } else { /* cold start: open limits before starting chip */ 700 int i; 701 702 for (i = 0; i < 6; i++) { 703 i2c_smbus_write_byte_data(client, 704 ADM9240_REG_IN_MIN(i), 0); 705 i2c_smbus_write_byte_data(client, 706 ADM9240_REG_IN_MAX(i), 255); 707 } 708 i2c_smbus_write_byte_data(client, 709 ADM9240_REG_FAN_MIN(0), 255); 710 i2c_smbus_write_byte_data(client, 711 ADM9240_REG_FAN_MIN(1), 255); 712 i2c_smbus_write_byte_data(client, 713 ADM9240_REG_TEMP_MAX(0), 127); 714 i2c_smbus_write_byte_data(client, 715 ADM9240_REG_TEMP_MAX(1), 127); 716 717 /* start measurement cycle */ 718 i2c_smbus_write_byte_data(client, ADM9240_REG_CONFIG, 1); 719 720 dev_info(&client->dev, 721 "cold start: config was 0x%02x mode %u\n", conf, mode); 722 } 723 } 724 725 static int adm9240_probe(struct i2c_client *new_client, 726 const struct i2c_device_id *id) 727 { 728 struct device *dev = &new_client->dev; 729 struct device *hwmon_dev; 730 struct adm9240_data *data; 731 732 data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL); 733 if (!data) 734 return -ENOMEM; 735 736 i2c_set_clientdata(new_client, data); 737 data->client = new_client; 738 mutex_init(&data->update_lock); 739 740 adm9240_init_client(new_client); 741 742 hwmon_dev = devm_hwmon_device_register_with_groups(dev, 743 new_client->name, 744 data, 745 adm9240_groups); 746 return PTR_ERR_OR_ZERO(hwmon_dev); 747 } 748 749 static const struct i2c_device_id adm9240_id[] = { 750 { "adm9240", adm9240 }, 751 { "ds1780", ds1780 }, 752 { "lm81", lm81 }, 753 { } 754 }; 755 MODULE_DEVICE_TABLE(i2c, adm9240_id); 756 757 static struct i2c_driver adm9240_driver = { 758 .class = I2C_CLASS_HWMON, 759 .driver = { 760 .name = "adm9240", 761 }, 762 .probe = adm9240_probe, 763 .id_table = adm9240_id, 764 .detect = adm9240_detect, 765 .address_list = normal_i2c, 766 }; 767 768 module_i2c_driver(adm9240_driver); 769 770 MODULE_AUTHOR("Michiel Rook <michiel@grendelproject.nl>, " 771 "Grant Coady <gcoady.lk@gmail.com> and others"); 772 MODULE_DESCRIPTION("ADM9240/DS1780/LM81 driver"); 773 MODULE_LICENSE("GPL"); 774