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 max_show(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 max_store(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_RW(temp1_max, max, 0); 303 static SENSOR_DEVICE_ATTR_RW(temp1_max_hyst, max, 1); 304 305 /* voltage */ 306 static ssize_t in_show(struct device *dev, struct device_attribute *devattr, 307 char *buf) 308 { 309 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 310 struct adm9240_data *data = adm9240_update_device(dev); 311 return sprintf(buf, "%d\n", IN_FROM_REG(data->in[attr->index], 312 attr->index)); 313 } 314 315 static ssize_t in_min_show(struct device *dev, 316 struct device_attribute *devattr, char *buf) 317 { 318 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 319 struct adm9240_data *data = adm9240_update_device(dev); 320 return sprintf(buf, "%d\n", IN_FROM_REG(data->in_min[attr->index], 321 attr->index)); 322 } 323 324 static ssize_t in_max_show(struct device *dev, 325 struct device_attribute *devattr, char *buf) 326 { 327 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 328 struct adm9240_data *data = adm9240_update_device(dev); 329 return sprintf(buf, "%d\n", IN_FROM_REG(data->in_max[attr->index], 330 attr->index)); 331 } 332 333 static ssize_t in_min_store(struct device *dev, 334 struct device_attribute *devattr, const char *buf, 335 size_t count) 336 { 337 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 338 struct adm9240_data *data = dev_get_drvdata(dev); 339 struct i2c_client *client = data->client; 340 unsigned long val; 341 int err; 342 343 err = kstrtoul(buf, 10, &val); 344 if (err) 345 return err; 346 347 mutex_lock(&data->update_lock); 348 data->in_min[attr->index] = IN_TO_REG(val, attr->index); 349 i2c_smbus_write_byte_data(client, ADM9240_REG_IN_MIN(attr->index), 350 data->in_min[attr->index]); 351 mutex_unlock(&data->update_lock); 352 return count; 353 } 354 355 static ssize_t in_max_store(struct device *dev, 356 struct device_attribute *devattr, const char *buf, 357 size_t count) 358 { 359 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 360 struct adm9240_data *data = dev_get_drvdata(dev); 361 struct i2c_client *client = data->client; 362 unsigned long val; 363 int err; 364 365 err = kstrtoul(buf, 10, &val); 366 if (err) 367 return err; 368 369 mutex_lock(&data->update_lock); 370 data->in_max[attr->index] = IN_TO_REG(val, attr->index); 371 i2c_smbus_write_byte_data(client, ADM9240_REG_IN_MAX(attr->index), 372 data->in_max[attr->index]); 373 mutex_unlock(&data->update_lock); 374 return count; 375 } 376 377 static SENSOR_DEVICE_ATTR_RO(in0_input, in, 0); 378 static SENSOR_DEVICE_ATTR_RW(in0_min, in_min, 0); 379 static SENSOR_DEVICE_ATTR_RW(in0_max, in_max, 0); 380 static SENSOR_DEVICE_ATTR_RO(in1_input, in, 1); 381 static SENSOR_DEVICE_ATTR_RW(in1_min, in_min, 1); 382 static SENSOR_DEVICE_ATTR_RW(in1_max, in_max, 1); 383 static SENSOR_DEVICE_ATTR_RO(in2_input, in, 2); 384 static SENSOR_DEVICE_ATTR_RW(in2_min, in_min, 2); 385 static SENSOR_DEVICE_ATTR_RW(in2_max, in_max, 2); 386 static SENSOR_DEVICE_ATTR_RO(in3_input, in, 3); 387 static SENSOR_DEVICE_ATTR_RW(in3_min, in_min, 3); 388 static SENSOR_DEVICE_ATTR_RW(in3_max, in_max, 3); 389 static SENSOR_DEVICE_ATTR_RO(in4_input, in, 4); 390 static SENSOR_DEVICE_ATTR_RW(in4_min, in_min, 4); 391 static SENSOR_DEVICE_ATTR_RW(in4_max, in_max, 4); 392 static SENSOR_DEVICE_ATTR_RO(in5_input, in, 5); 393 static SENSOR_DEVICE_ATTR_RW(in5_min, in_min, 5); 394 static SENSOR_DEVICE_ATTR_RW(in5_max, in_max, 5); 395 396 /* fans */ 397 static ssize_t fan_show(struct device *dev, struct device_attribute *devattr, 398 char *buf) 399 { 400 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 401 struct adm9240_data *data = adm9240_update_device(dev); 402 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[attr->index], 403 1 << data->fan_div[attr->index])); 404 } 405 406 static ssize_t fan_min_show(struct device *dev, 407 struct device_attribute *devattr, char *buf) 408 { 409 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 410 struct adm9240_data *data = adm9240_update_device(dev); 411 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[attr->index], 412 1 << data->fan_div[attr->index])); 413 } 414 415 static ssize_t fan_div_show(struct device *dev, 416 struct device_attribute *devattr, char *buf) 417 { 418 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 419 struct adm9240_data *data = adm9240_update_device(dev); 420 return sprintf(buf, "%d\n", 1 << data->fan_div[attr->index]); 421 } 422 423 /* 424 * set fan speed low limit: 425 * 426 * - value is zero: disable fan speed low limit alarm 427 * 428 * - value is below fan speed measurement range: enable fan speed low 429 * limit alarm to be asserted while fan speed too slow to measure 430 * 431 * - otherwise: select fan clock divider to suit fan speed low limit, 432 * measurement code may adjust registers to ensure fan speed reading 433 */ 434 static ssize_t fan_min_store(struct device *dev, 435 struct device_attribute *devattr, 436 const char *buf, size_t count) 437 { 438 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 439 struct adm9240_data *data = dev_get_drvdata(dev); 440 struct i2c_client *client = data->client; 441 int nr = attr->index; 442 u8 new_div; 443 unsigned long val; 444 int err; 445 446 err = kstrtoul(buf, 10, &val); 447 if (err) 448 return err; 449 450 mutex_lock(&data->update_lock); 451 452 if (!val) { 453 data->fan_min[nr] = 255; 454 new_div = data->fan_div[nr]; 455 456 dev_dbg(&client->dev, "fan%u low limit set disabled\n", 457 nr + 1); 458 459 } else if (val < 1350000 / (8 * 254)) { 460 new_div = 3; 461 data->fan_min[nr] = 254; 462 463 dev_dbg(&client->dev, "fan%u low limit set minimum %u\n", 464 nr + 1, FAN_FROM_REG(254, 1 << new_div)); 465 466 } else { 467 unsigned int new_min = 1350000 / val; 468 469 new_div = 0; 470 while (new_min > 192 && new_div < 3) { 471 new_div++; 472 new_min /= 2; 473 } 474 if (!new_min) /* keep > 0 */ 475 new_min++; 476 477 data->fan_min[nr] = new_min; 478 479 dev_dbg(&client->dev, "fan%u low limit set fan speed %u\n", 480 nr + 1, FAN_FROM_REG(new_min, 1 << new_div)); 481 } 482 483 if (new_div != data->fan_div[nr]) { 484 data->fan_div[nr] = new_div; 485 adm9240_write_fan_div(client, nr, new_div); 486 } 487 i2c_smbus_write_byte_data(client, ADM9240_REG_FAN_MIN(nr), 488 data->fan_min[nr]); 489 490 mutex_unlock(&data->update_lock); 491 return count; 492 } 493 494 static SENSOR_DEVICE_ATTR_RO(fan1_input, fan, 0); 495 static SENSOR_DEVICE_ATTR_RW(fan1_min, fan_min, 0); 496 static SENSOR_DEVICE_ATTR_RO(fan1_div, fan_div, 0); 497 static SENSOR_DEVICE_ATTR_RO(fan2_input, fan, 1); 498 static SENSOR_DEVICE_ATTR_RW(fan2_min, fan_min, 1); 499 static SENSOR_DEVICE_ATTR_RO(fan2_div, fan_div, 1); 500 501 /* alarms */ 502 static ssize_t alarms_show(struct device *dev, 503 struct device_attribute *attr, char *buf) 504 { 505 struct adm9240_data *data = adm9240_update_device(dev); 506 return sprintf(buf, "%u\n", data->alarms); 507 } 508 static DEVICE_ATTR_RO(alarms); 509 510 static ssize_t alarm_show(struct device *dev, struct device_attribute *attr, 511 char *buf) 512 { 513 int bitnr = to_sensor_dev_attr(attr)->index; 514 struct adm9240_data *data = adm9240_update_device(dev); 515 return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1); 516 } 517 static SENSOR_DEVICE_ATTR_RO(in0_alarm, alarm, 0); 518 static SENSOR_DEVICE_ATTR_RO(in1_alarm, alarm, 1); 519 static SENSOR_DEVICE_ATTR_RO(in2_alarm, alarm, 2); 520 static SENSOR_DEVICE_ATTR_RO(in3_alarm, alarm, 3); 521 static SENSOR_DEVICE_ATTR_RO(in4_alarm, alarm, 8); 522 static SENSOR_DEVICE_ATTR_RO(in5_alarm, alarm, 9); 523 static SENSOR_DEVICE_ATTR_RO(temp1_alarm, alarm, 4); 524 static SENSOR_DEVICE_ATTR_RO(fan1_alarm, alarm, 6); 525 static SENSOR_DEVICE_ATTR_RO(fan2_alarm, alarm, 7); 526 527 /* vid */ 528 static ssize_t cpu0_vid_show(struct device *dev, 529 struct device_attribute *attr, char *buf) 530 { 531 struct adm9240_data *data = adm9240_update_device(dev); 532 return sprintf(buf, "%d\n", vid_from_reg(data->vid, data->vrm)); 533 } 534 static DEVICE_ATTR_RO(cpu0_vid); 535 536 /* analog output */ 537 static ssize_t aout_output_show(struct device *dev, 538 struct device_attribute *attr, char *buf) 539 { 540 struct adm9240_data *data = adm9240_update_device(dev); 541 return sprintf(buf, "%d\n", AOUT_FROM_REG(data->aout)); 542 } 543 544 static ssize_t aout_output_store(struct device *dev, 545 struct device_attribute *attr, 546 const char *buf, size_t count) 547 { 548 struct adm9240_data *data = dev_get_drvdata(dev); 549 struct i2c_client *client = data->client; 550 long val; 551 int err; 552 553 err = kstrtol(buf, 10, &val); 554 if (err) 555 return err; 556 557 mutex_lock(&data->update_lock); 558 data->aout = AOUT_TO_REG(val); 559 i2c_smbus_write_byte_data(client, ADM9240_REG_ANALOG_OUT, data->aout); 560 mutex_unlock(&data->update_lock); 561 return count; 562 } 563 static DEVICE_ATTR_RW(aout_output); 564 565 static ssize_t alarm_store(struct device *dev, 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_RW(intrusion0_alarm, alarm, 12); 584 585 static struct attribute *adm9240_attrs[] = { 586 &sensor_dev_attr_in0_input.dev_attr.attr, 587 &sensor_dev_attr_in0_min.dev_attr.attr, 588 &sensor_dev_attr_in0_max.dev_attr.attr, 589 &sensor_dev_attr_in0_alarm.dev_attr.attr, 590 &sensor_dev_attr_in1_input.dev_attr.attr, 591 &sensor_dev_attr_in1_min.dev_attr.attr, 592 &sensor_dev_attr_in1_max.dev_attr.attr, 593 &sensor_dev_attr_in1_alarm.dev_attr.attr, 594 &sensor_dev_attr_in2_input.dev_attr.attr, 595 &sensor_dev_attr_in2_min.dev_attr.attr, 596 &sensor_dev_attr_in2_max.dev_attr.attr, 597 &sensor_dev_attr_in2_alarm.dev_attr.attr, 598 &sensor_dev_attr_in3_input.dev_attr.attr, 599 &sensor_dev_attr_in3_min.dev_attr.attr, 600 &sensor_dev_attr_in3_max.dev_attr.attr, 601 &sensor_dev_attr_in3_alarm.dev_attr.attr, 602 &sensor_dev_attr_in4_input.dev_attr.attr, 603 &sensor_dev_attr_in4_min.dev_attr.attr, 604 &sensor_dev_attr_in4_max.dev_attr.attr, 605 &sensor_dev_attr_in4_alarm.dev_attr.attr, 606 &sensor_dev_attr_in5_input.dev_attr.attr, 607 &sensor_dev_attr_in5_min.dev_attr.attr, 608 &sensor_dev_attr_in5_max.dev_attr.attr, 609 &sensor_dev_attr_in5_alarm.dev_attr.attr, 610 &dev_attr_temp1_input.attr, 611 &sensor_dev_attr_temp1_max.dev_attr.attr, 612 &sensor_dev_attr_temp1_max_hyst.dev_attr.attr, 613 &sensor_dev_attr_temp1_alarm.dev_attr.attr, 614 &sensor_dev_attr_fan1_input.dev_attr.attr, 615 &sensor_dev_attr_fan1_div.dev_attr.attr, 616 &sensor_dev_attr_fan1_min.dev_attr.attr, 617 &sensor_dev_attr_fan1_alarm.dev_attr.attr, 618 &sensor_dev_attr_fan2_input.dev_attr.attr, 619 &sensor_dev_attr_fan2_div.dev_attr.attr, 620 &sensor_dev_attr_fan2_min.dev_attr.attr, 621 &sensor_dev_attr_fan2_alarm.dev_attr.attr, 622 &dev_attr_alarms.attr, 623 &dev_attr_aout_output.attr, 624 &sensor_dev_attr_intrusion0_alarm.dev_attr.attr, 625 &dev_attr_cpu0_vid.attr, 626 NULL 627 }; 628 629 ATTRIBUTE_GROUPS(adm9240); 630 631 /*** sensor chip detect and driver install ***/ 632 633 /* Return 0 if detection is successful, -ENODEV otherwise */ 634 static int adm9240_detect(struct i2c_client *new_client, 635 struct i2c_board_info *info) 636 { 637 struct i2c_adapter *adapter = new_client->adapter; 638 const char *name = ""; 639 int address = new_client->addr; 640 u8 man_id, die_rev; 641 642 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) 643 return -ENODEV; 644 645 /* verify chip: reg address should match i2c address */ 646 if (i2c_smbus_read_byte_data(new_client, ADM9240_REG_I2C_ADDR) 647 != address) { 648 dev_err(&adapter->dev, "detect fail: address match, 0x%02x\n", 649 address); 650 return -ENODEV; 651 } 652 653 /* check known chip manufacturer */ 654 man_id = i2c_smbus_read_byte_data(new_client, ADM9240_REG_MAN_ID); 655 if (man_id == 0x23) { 656 name = "adm9240"; 657 } else if (man_id == 0xda) { 658 name = "ds1780"; 659 } else if (man_id == 0x01) { 660 name = "lm81"; 661 } else { 662 dev_err(&adapter->dev, "detect fail: unknown manuf, 0x%02x\n", 663 man_id); 664 return -ENODEV; 665 } 666 667 /* successful detect, print chip info */ 668 die_rev = i2c_smbus_read_byte_data(new_client, ADM9240_REG_DIE_REV); 669 dev_info(&adapter->dev, "found %s revision %u\n", 670 man_id == 0x23 ? "ADM9240" : 671 man_id == 0xda ? "DS1780" : "LM81", die_rev); 672 673 strlcpy(info->type, name, I2C_NAME_SIZE); 674 675 return 0; 676 } 677 678 static void adm9240_init_client(struct i2c_client *client) 679 { 680 struct adm9240_data *data = i2c_get_clientdata(client); 681 u8 conf = i2c_smbus_read_byte_data(client, ADM9240_REG_CONFIG); 682 u8 mode = i2c_smbus_read_byte_data(client, ADM9240_REG_TEMP_CONF) & 3; 683 684 data->vrm = vid_which_vrm(); /* need this to report vid as mV */ 685 686 dev_info(&client->dev, "Using VRM: %d.%d\n", data->vrm / 10, 687 data->vrm % 10); 688 689 if (conf & 1) { /* measurement cycle running: report state */ 690 691 dev_info(&client->dev, "status: config 0x%02x mode %u\n", 692 conf, mode); 693 694 } else { /* cold start: open limits before starting chip */ 695 int i; 696 697 for (i = 0; i < 6; i++) { 698 i2c_smbus_write_byte_data(client, 699 ADM9240_REG_IN_MIN(i), 0); 700 i2c_smbus_write_byte_data(client, 701 ADM9240_REG_IN_MAX(i), 255); 702 } 703 i2c_smbus_write_byte_data(client, 704 ADM9240_REG_FAN_MIN(0), 255); 705 i2c_smbus_write_byte_data(client, 706 ADM9240_REG_FAN_MIN(1), 255); 707 i2c_smbus_write_byte_data(client, 708 ADM9240_REG_TEMP_MAX(0), 127); 709 i2c_smbus_write_byte_data(client, 710 ADM9240_REG_TEMP_MAX(1), 127); 711 712 /* start measurement cycle */ 713 i2c_smbus_write_byte_data(client, ADM9240_REG_CONFIG, 1); 714 715 dev_info(&client->dev, 716 "cold start: config was 0x%02x mode %u\n", conf, mode); 717 } 718 } 719 720 static int adm9240_probe(struct i2c_client *new_client, 721 const struct i2c_device_id *id) 722 { 723 struct device *dev = &new_client->dev; 724 struct device *hwmon_dev; 725 struct adm9240_data *data; 726 727 data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL); 728 if (!data) 729 return -ENOMEM; 730 731 i2c_set_clientdata(new_client, data); 732 data->client = new_client; 733 mutex_init(&data->update_lock); 734 735 adm9240_init_client(new_client); 736 737 hwmon_dev = devm_hwmon_device_register_with_groups(dev, 738 new_client->name, 739 data, 740 adm9240_groups); 741 return PTR_ERR_OR_ZERO(hwmon_dev); 742 } 743 744 static const struct i2c_device_id adm9240_id[] = { 745 { "adm9240", adm9240 }, 746 { "ds1780", ds1780 }, 747 { "lm81", lm81 }, 748 { } 749 }; 750 MODULE_DEVICE_TABLE(i2c, adm9240_id); 751 752 static struct i2c_driver adm9240_driver = { 753 .class = I2C_CLASS_HWMON, 754 .driver = { 755 .name = "adm9240", 756 }, 757 .probe = adm9240_probe, 758 .id_table = adm9240_id, 759 .detect = adm9240_detect, 760 .address_list = normal_i2c, 761 }; 762 763 module_i2c_driver(adm9240_driver); 764 765 MODULE_AUTHOR("Michiel Rook <michiel@grendelproject.nl>, " 766 "Grant Coady <gcoady.lk@gmail.com> and others"); 767 MODULE_DESCRIPTION("ADM9240/DS1780/LM81 driver"); 768 MODULE_LICENSE("GPL"); 769