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@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 1 > chassis_clear' 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/i2c-vid.h> 49 #include <linux/hwmon.h> 50 #include <linux/err.h> 51 52 /* Addresses to scan */ 53 static unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, 0x2f, 54 I2C_CLIENT_END }; 55 56 /* Insmod parameters */ 57 I2C_CLIENT_INSMOD_3(adm9240, ds1780, lm81); 58 59 /* ADM9240 registers */ 60 #define ADM9240_REG_MAN_ID 0x3e 61 #define ADM9240_REG_DIE_REV 0x3f 62 #define ADM9240_REG_CONFIG 0x40 63 64 #define ADM9240_REG_IN(nr) (0x20 + (nr)) /* 0..5 */ 65 #define ADM9240_REG_IN_MAX(nr) (0x2b + (nr) * 2) 66 #define ADM9240_REG_IN_MIN(nr) (0x2c + (nr) * 2) 67 #define ADM9240_REG_FAN(nr) (0x28 + (nr)) /* 0..1 */ 68 #define ADM9240_REG_FAN_MIN(nr) (0x3b + (nr)) 69 #define ADM9240_REG_INT(nr) (0x41 + (nr)) 70 #define ADM9240_REG_INT_MASK(nr) (0x43 + (nr)) 71 #define ADM9240_REG_TEMP 0x27 72 #define ADM9240_REG_TEMP_HIGH 0x39 73 #define ADM9240_REG_TEMP_HYST 0x3a 74 #define ADM9240_REG_ANALOG_OUT 0x19 75 #define ADM9240_REG_CHASSIS_CLEAR 0x46 76 #define ADM9240_REG_VID_FAN_DIV 0x47 77 #define ADM9240_REG_I2C_ADDR 0x48 78 #define ADM9240_REG_VID4 0x49 79 #define ADM9240_REG_TEMP_CONF 0x4b 80 81 /* generalised scaling with integer rounding */ 82 static inline int SCALE(long val, int mul, int div) 83 { 84 if (val < 0) 85 return (val * mul - div / 2) / div; 86 else 87 return (val * mul + div / 2) / div; 88 } 89 90 /* adm9240 internally scales voltage measurements */ 91 static const u16 nom_mv[] = { 2500, 2700, 3300, 5000, 12000, 2700 }; 92 93 static inline unsigned int IN_FROM_REG(u8 reg, int n) 94 { 95 return SCALE(reg, nom_mv[n], 192); 96 } 97 98 static inline u8 IN_TO_REG(unsigned long val, int n) 99 { 100 return SENSORS_LIMIT(SCALE(val, 192, nom_mv[n]), 0, 255); 101 } 102 103 /* temperature range: -40..125, 127 disables temperature alarm */ 104 static inline s8 TEMP_TO_REG(long val) 105 { 106 return SENSORS_LIMIT(SCALE(val, 1, 1000), -40, 127); 107 } 108 109 /* two fans, each with low fan speed limit */ 110 static inline unsigned int FAN_FROM_REG(u8 reg, u8 div) 111 { 112 if (!reg) /* error */ 113 return -1; 114 115 if (reg == 255) 116 return 0; 117 118 return SCALE(1350000, 1, reg * div); 119 } 120 121 /* analog out 0..1250mV */ 122 static inline u8 AOUT_TO_REG(unsigned long val) 123 { 124 return SENSORS_LIMIT(SCALE(val, 255, 1250), 0, 255); 125 } 126 127 static inline unsigned int AOUT_FROM_REG(u8 reg) 128 { 129 return SCALE(reg, 1250, 255); 130 } 131 132 static int adm9240_attach_adapter(struct i2c_adapter *adapter); 133 static int adm9240_detect(struct i2c_adapter *adapter, int address, int kind); 134 static void adm9240_init_client(struct i2c_client *client); 135 static int adm9240_detach_client(struct i2c_client *client); 136 static struct adm9240_data *adm9240_update_device(struct device *dev); 137 138 /* driver data */ 139 static struct i2c_driver adm9240_driver = { 140 .owner = THIS_MODULE, 141 .name = "adm9240", 142 .id = I2C_DRIVERID_ADM9240, 143 .flags = I2C_DF_NOTIFY, 144 .attach_adapter = adm9240_attach_adapter, 145 .detach_client = adm9240_detach_client, 146 }; 147 148 /* per client data */ 149 struct adm9240_data { 150 enum chips type; 151 struct i2c_client client; 152 struct class_device *class_dev; 153 struct semaphore update_lock; 154 char valid; 155 unsigned long last_updated_measure; 156 unsigned long last_updated_config; 157 158 u8 in[6]; /* ro in0_input */ 159 u8 in_max[6]; /* rw in0_max */ 160 u8 in_min[6]; /* rw in0_min */ 161 u8 fan[2]; /* ro fan1_input */ 162 u8 fan_min[2]; /* rw fan1_min */ 163 u8 fan_div[2]; /* rw fan1_div, read-only accessor */ 164 s16 temp; /* ro temp1_input, 9-bit sign-extended */ 165 s8 temp_high; /* rw temp1_max */ 166 s8 temp_hyst; /* rw temp1_max_hyst */ 167 u16 alarms; /* ro alarms */ 168 u8 aout; /* rw aout_output */ 169 u8 vid; /* ro vid */ 170 u8 vrm; /* -- vrm set on startup, no accessor */ 171 }; 172 173 /* i2c byte read/write interface */ 174 static int adm9240_read_value(struct i2c_client *client, u8 reg) 175 { 176 return i2c_smbus_read_byte_data(client, reg); 177 } 178 179 static int adm9240_write_value(struct i2c_client *client, u8 reg, u8 value) 180 { 181 return i2c_smbus_write_byte_data(client, reg, value); 182 } 183 184 /*** sysfs accessors ***/ 185 186 /* temperature */ 187 #define show_temp(value, scale) \ 188 static ssize_t show_##value(struct device *dev, \ 189 struct device_attribute *attr, \ 190 char *buf) \ 191 { \ 192 struct adm9240_data *data = adm9240_update_device(dev); \ 193 return sprintf(buf, "%d\n", data->value * scale); \ 194 } 195 show_temp(temp_high, 1000); 196 show_temp(temp_hyst, 1000); 197 show_temp(temp, 500); /* 0.5'C per bit */ 198 199 #define set_temp(value, reg) \ 200 static ssize_t set_##value(struct device *dev, \ 201 struct device_attribute *attr, \ 202 const char *buf, size_t count) \ 203 { \ 204 struct i2c_client *client = to_i2c_client(dev); \ 205 struct adm9240_data *data = adm9240_update_device(dev); \ 206 long temp = simple_strtoul(buf, NULL, 10); \ 207 \ 208 down(&data->update_lock); \ 209 data->value = TEMP_TO_REG(temp); \ 210 adm9240_write_value(client, reg, data->value); \ 211 up(&data->update_lock); \ 212 return count; \ 213 } 214 215 set_temp(temp_high, ADM9240_REG_TEMP_HIGH); 216 set_temp(temp_hyst, ADM9240_REG_TEMP_HYST); 217 218 static DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, 219 show_temp_high, set_temp_high); 220 static DEVICE_ATTR(temp1_max_hyst, S_IWUSR | S_IRUGO, 221 show_temp_hyst, set_temp_hyst); 222 static DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL); 223 224 /* voltage */ 225 static ssize_t show_in(struct device *dev, char *buf, int nr) 226 { 227 struct adm9240_data *data = adm9240_update_device(dev); 228 return sprintf(buf, "%d\n", IN_FROM_REG(data->in[nr], nr)); 229 } 230 231 static ssize_t show_in_min(struct device *dev, char *buf, int nr) 232 { 233 struct adm9240_data *data = adm9240_update_device(dev); 234 return sprintf(buf, "%d\n", IN_FROM_REG(data->in_min[nr], nr)); 235 } 236 237 static ssize_t show_in_max(struct device *dev, char *buf, int nr) 238 { 239 struct adm9240_data *data = adm9240_update_device(dev); 240 return sprintf(buf, "%d\n", IN_FROM_REG(data->in_max[nr], nr)); 241 } 242 243 static ssize_t set_in_min(struct device *dev, const char *buf, 244 size_t count, int nr) 245 { 246 struct i2c_client *client = to_i2c_client(dev); 247 struct adm9240_data *data = i2c_get_clientdata(client); 248 unsigned long val = simple_strtoul(buf, NULL, 10); 249 250 down(&data->update_lock); 251 data->in_min[nr] = IN_TO_REG(val, nr); 252 adm9240_write_value(client, ADM9240_REG_IN_MIN(nr), data->in_min[nr]); 253 up(&data->update_lock); 254 return count; 255 } 256 257 static ssize_t set_in_max(struct device *dev, const char *buf, 258 size_t count, int nr) 259 { 260 struct i2c_client *client = to_i2c_client(dev); 261 struct adm9240_data *data = i2c_get_clientdata(client); 262 unsigned long val = simple_strtoul(buf, NULL, 10); 263 264 down(&data->update_lock); 265 data->in_max[nr] = IN_TO_REG(val, nr); 266 adm9240_write_value(client, ADM9240_REG_IN_MAX(nr), data->in_max[nr]); 267 up(&data->update_lock); 268 return count; 269 } 270 271 #define show_in_offset(offset) \ 272 static ssize_t show_in##offset(struct device *dev, \ 273 struct device_attribute *attr, \ 274 char *buf) \ 275 { \ 276 return show_in(dev, buf, offset); \ 277 } \ 278 static DEVICE_ATTR(in##offset##_input, S_IRUGO, show_in##offset, NULL); \ 279 static ssize_t show_in##offset##_min(struct device *dev, \ 280 struct device_attribute *attr, \ 281 char *buf) \ 282 { \ 283 return show_in_min(dev, buf, offset); \ 284 } \ 285 static ssize_t show_in##offset##_max(struct device *dev, \ 286 struct device_attribute *attr, \ 287 char *buf) \ 288 { \ 289 return show_in_max(dev, buf, offset); \ 290 } \ 291 static ssize_t \ 292 set_in##offset##_min(struct device *dev, \ 293 struct device_attribute *attr, const char *buf, \ 294 size_t count) \ 295 { \ 296 return set_in_min(dev, buf, count, offset); \ 297 } \ 298 static ssize_t \ 299 set_in##offset##_max(struct device *dev, \ 300 struct device_attribute *attr, const char *buf, \ 301 size_t count) \ 302 { \ 303 return set_in_max(dev, buf, count, offset); \ 304 } \ 305 static DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \ 306 show_in##offset##_min, set_in##offset##_min); \ 307 static DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \ 308 show_in##offset##_max, set_in##offset##_max); 309 310 show_in_offset(0); 311 show_in_offset(1); 312 show_in_offset(2); 313 show_in_offset(3); 314 show_in_offset(4); 315 show_in_offset(5); 316 317 /* fans */ 318 static ssize_t show_fan(struct device *dev, char *buf, int nr) 319 { 320 struct adm9240_data *data = adm9240_update_device(dev); 321 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[nr], 322 1 << data->fan_div[nr])); 323 } 324 325 static ssize_t show_fan_min(struct device *dev, char *buf, int nr) 326 { 327 struct adm9240_data *data = adm9240_update_device(dev); 328 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[nr], 329 1 << data->fan_div[nr])); 330 } 331 332 static ssize_t show_fan_div(struct device *dev, char *buf, int nr) 333 { 334 struct adm9240_data *data = adm9240_update_device(dev); 335 return sprintf(buf, "%d\n", 1 << data->fan_div[nr]); 336 } 337 338 /* write new fan div, callers must hold data->update_lock */ 339 static void adm9240_write_fan_div(struct i2c_client *client, int nr, 340 u8 fan_div) 341 { 342 u8 reg, old, shift = (nr + 2) * 2; 343 344 reg = adm9240_read_value(client, ADM9240_REG_VID_FAN_DIV); 345 old = (reg >> shift) & 3; 346 reg &= ~(3 << shift); 347 reg |= (fan_div << shift); 348 adm9240_write_value(client, ADM9240_REG_VID_FAN_DIV, reg); 349 dev_dbg(&client->dev, "fan%d clock divider changed from %u " 350 "to %u\n", nr + 1, 1 << old, 1 << fan_div); 351 } 352 353 /* 354 * set fan speed low limit: 355 * 356 * - value is zero: disable fan speed low limit alarm 357 * 358 * - value is below fan speed measurement range: enable fan speed low 359 * limit alarm to be asserted while fan speed too slow to measure 360 * 361 * - otherwise: select fan clock divider to suit fan speed low limit, 362 * measurement code may adjust registers to ensure fan speed reading 363 */ 364 static ssize_t set_fan_min(struct device *dev, const char *buf, 365 size_t count, int nr) 366 { 367 struct i2c_client *client = to_i2c_client(dev); 368 struct adm9240_data *data = i2c_get_clientdata(client); 369 unsigned long val = simple_strtoul(buf, NULL, 10); 370 u8 new_div; 371 372 down(&data->update_lock); 373 374 if (!val) { 375 data->fan_min[nr] = 255; 376 new_div = data->fan_div[nr]; 377 378 dev_dbg(&client->dev, "fan%u low limit set disabled\n", 379 nr + 1); 380 381 } else if (val < 1350000 / (8 * 254)) { 382 new_div = 3; 383 data->fan_min[nr] = 254; 384 385 dev_dbg(&client->dev, "fan%u low limit set minimum %u\n", 386 nr + 1, FAN_FROM_REG(254, 1 << new_div)); 387 388 } else { 389 unsigned int new_min = 1350000 / val; 390 391 new_div = 0; 392 while (new_min > 192 && new_div < 3) { 393 new_div++; 394 new_min /= 2; 395 } 396 if (!new_min) /* keep > 0 */ 397 new_min++; 398 399 data->fan_min[nr] = new_min; 400 401 dev_dbg(&client->dev, "fan%u low limit set fan speed %u\n", 402 nr + 1, FAN_FROM_REG(new_min, 1 << new_div)); 403 } 404 405 if (new_div != data->fan_div[nr]) { 406 data->fan_div[nr] = new_div; 407 adm9240_write_fan_div(client, nr, new_div); 408 } 409 adm9240_write_value(client, ADM9240_REG_FAN_MIN(nr), 410 data->fan_min[nr]); 411 412 up(&data->update_lock); 413 return count; 414 } 415 416 #define show_fan_offset(offset) \ 417 static ssize_t show_fan_##offset (struct device *dev, \ 418 struct device_attribute *attr, \ 419 char *buf) \ 420 { \ 421 return show_fan(dev, buf, offset - 1); \ 422 } \ 423 static ssize_t show_fan_##offset##_div (struct device *dev, \ 424 struct device_attribute *attr, \ 425 char *buf) \ 426 { \ 427 return show_fan_div(dev, buf, offset - 1); \ 428 } \ 429 static ssize_t show_fan_##offset##_min (struct device *dev, \ 430 struct device_attribute *attr, \ 431 char *buf) \ 432 { \ 433 return show_fan_min(dev, buf, offset - 1); \ 434 } \ 435 static ssize_t set_fan_##offset##_min (struct device *dev, \ 436 struct device_attribute *attr, \ 437 const char *buf, size_t count) \ 438 { \ 439 return set_fan_min(dev, buf, count, offset - 1); \ 440 } \ 441 static DEVICE_ATTR(fan##offset##_input, S_IRUGO, \ 442 show_fan_##offset, NULL); \ 443 static DEVICE_ATTR(fan##offset##_div, S_IRUGO, \ 444 show_fan_##offset##_div, NULL); \ 445 static DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \ 446 show_fan_##offset##_min, set_fan_##offset##_min); 447 448 show_fan_offset(1); 449 show_fan_offset(2); 450 451 /* alarms */ 452 static ssize_t show_alarms(struct device *dev, struct device_attribute *attr, char *buf) 453 { 454 struct adm9240_data *data = adm9240_update_device(dev); 455 return sprintf(buf, "%u\n", data->alarms); 456 } 457 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL); 458 459 /* vid */ 460 static ssize_t show_vid(struct device *dev, struct device_attribute *attr, char *buf) 461 { 462 struct adm9240_data *data = adm9240_update_device(dev); 463 return sprintf(buf, "%d\n", vid_from_reg(data->vid, data->vrm)); 464 } 465 static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid, NULL); 466 467 /* analog output */ 468 static ssize_t show_aout(struct device *dev, struct device_attribute *attr, char *buf) 469 { 470 struct adm9240_data *data = adm9240_update_device(dev); 471 return sprintf(buf, "%d\n", AOUT_FROM_REG(data->aout)); 472 } 473 474 static ssize_t set_aout(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) 475 { 476 struct i2c_client *client = to_i2c_client(dev); 477 struct adm9240_data *data = i2c_get_clientdata(client); 478 unsigned long val = simple_strtol(buf, NULL, 10); 479 480 down(&data->update_lock); 481 data->aout = AOUT_TO_REG(val); 482 adm9240_write_value(client, ADM9240_REG_ANALOG_OUT, data->aout); 483 up(&data->update_lock); 484 return count; 485 } 486 static DEVICE_ATTR(aout_output, S_IRUGO | S_IWUSR, show_aout, set_aout); 487 488 /* chassis_clear */ 489 static ssize_t chassis_clear(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) 490 { 491 struct i2c_client *client = to_i2c_client(dev); 492 unsigned long val = simple_strtol(buf, NULL, 10); 493 494 if (val == 1) { 495 adm9240_write_value(client, ADM9240_REG_CHASSIS_CLEAR, 0x80); 496 dev_dbg(&client->dev, "chassis intrusion latch cleared\n"); 497 } 498 return count; 499 } 500 static DEVICE_ATTR(chassis_clear, S_IWUSR, NULL, chassis_clear); 501 502 503 /*** sensor chip detect and driver install ***/ 504 505 static int adm9240_detect(struct i2c_adapter *adapter, int address, int kind) 506 { 507 struct i2c_client *new_client; 508 struct adm9240_data *data; 509 int err = 0; 510 const char *name = ""; 511 u8 man_id, die_rev; 512 513 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) 514 goto exit; 515 516 if (!(data = kmalloc(sizeof(struct adm9240_data), GFP_KERNEL))) { 517 err = -ENOMEM; 518 goto exit; 519 } 520 memset(data, 0, sizeof(struct adm9240_data)); 521 522 new_client = &data->client; 523 i2c_set_clientdata(new_client, data); 524 new_client->addr = address; 525 new_client->adapter = adapter; 526 new_client->driver = &adm9240_driver; 527 new_client->flags = 0; 528 529 if (kind == 0) { 530 kind = adm9240; 531 } 532 533 if (kind < 0) { 534 535 /* verify chip: reg address should match i2c address */ 536 if (adm9240_read_value(new_client, ADM9240_REG_I2C_ADDR) 537 != address) { 538 dev_err(&adapter->dev, "detect fail: address match, " 539 "0x%02x\n", address); 540 goto exit_free; 541 } 542 543 /* check known chip manufacturer */ 544 man_id = adm9240_read_value(new_client, ADM9240_REG_MAN_ID); 545 546 if (man_id == 0x23) { 547 kind = adm9240; 548 } else if (man_id == 0xda) { 549 kind = ds1780; 550 } else if (man_id == 0x01) { 551 kind = lm81; 552 } else { 553 dev_err(&adapter->dev, "detect fail: unknown manuf, " 554 "0x%02x\n", man_id); 555 goto exit_free; 556 } 557 558 /* successful detect, print chip info */ 559 die_rev = adm9240_read_value(new_client, ADM9240_REG_DIE_REV); 560 dev_info(&adapter->dev, "found %s revision %u\n", 561 man_id == 0x23 ? "ADM9240" : 562 man_id == 0xda ? "DS1780" : "LM81", die_rev); 563 } 564 565 /* either forced or detected chip kind */ 566 if (kind == adm9240) { 567 name = "adm9240"; 568 } else if (kind == ds1780) { 569 name = "ds1780"; 570 } else if (kind == lm81) { 571 name = "lm81"; 572 } 573 574 /* fill in the remaining client fields and attach */ 575 strlcpy(new_client->name, name, I2C_NAME_SIZE); 576 data->type = kind; 577 init_MUTEX(&data->update_lock); 578 579 if ((err = i2c_attach_client(new_client))) 580 goto exit_free; 581 582 adm9240_init_client(new_client); 583 584 /* populate sysfs filesystem */ 585 data->class_dev = hwmon_device_register(&new_client->dev); 586 if (IS_ERR(data->class_dev)) { 587 err = PTR_ERR(data->class_dev); 588 goto exit_detach; 589 } 590 591 device_create_file(&new_client->dev, &dev_attr_in0_input); 592 device_create_file(&new_client->dev, &dev_attr_in0_min); 593 device_create_file(&new_client->dev, &dev_attr_in0_max); 594 device_create_file(&new_client->dev, &dev_attr_in1_input); 595 device_create_file(&new_client->dev, &dev_attr_in1_min); 596 device_create_file(&new_client->dev, &dev_attr_in1_max); 597 device_create_file(&new_client->dev, &dev_attr_in2_input); 598 device_create_file(&new_client->dev, &dev_attr_in2_min); 599 device_create_file(&new_client->dev, &dev_attr_in2_max); 600 device_create_file(&new_client->dev, &dev_attr_in3_input); 601 device_create_file(&new_client->dev, &dev_attr_in3_min); 602 device_create_file(&new_client->dev, &dev_attr_in3_max); 603 device_create_file(&new_client->dev, &dev_attr_in4_input); 604 device_create_file(&new_client->dev, &dev_attr_in4_min); 605 device_create_file(&new_client->dev, &dev_attr_in4_max); 606 device_create_file(&new_client->dev, &dev_attr_in5_input); 607 device_create_file(&new_client->dev, &dev_attr_in5_min); 608 device_create_file(&new_client->dev, &dev_attr_in5_max); 609 device_create_file(&new_client->dev, &dev_attr_temp1_max); 610 device_create_file(&new_client->dev, &dev_attr_temp1_max_hyst); 611 device_create_file(&new_client->dev, &dev_attr_temp1_input); 612 device_create_file(&new_client->dev, &dev_attr_fan1_input); 613 device_create_file(&new_client->dev, &dev_attr_fan1_div); 614 device_create_file(&new_client->dev, &dev_attr_fan1_min); 615 device_create_file(&new_client->dev, &dev_attr_fan2_input); 616 device_create_file(&new_client->dev, &dev_attr_fan2_div); 617 device_create_file(&new_client->dev, &dev_attr_fan2_min); 618 device_create_file(&new_client->dev, &dev_attr_alarms); 619 device_create_file(&new_client->dev, &dev_attr_aout_output); 620 device_create_file(&new_client->dev, &dev_attr_chassis_clear); 621 device_create_file(&new_client->dev, &dev_attr_cpu0_vid); 622 623 return 0; 624 625 exit_detach: 626 i2c_detach_client(new_client); 627 exit_free: 628 kfree(data); 629 exit: 630 return err; 631 } 632 633 static int adm9240_attach_adapter(struct i2c_adapter *adapter) 634 { 635 if (!(adapter->class & I2C_CLASS_HWMON)) 636 return 0; 637 return i2c_probe(adapter, &addr_data, adm9240_detect); 638 } 639 640 static int adm9240_detach_client(struct i2c_client *client) 641 { 642 struct adm9240_data *data = i2c_get_clientdata(client); 643 int err; 644 645 hwmon_device_unregister(data->class_dev); 646 647 if ((err = i2c_detach_client(client))) 648 return err; 649 650 kfree(data); 651 return 0; 652 } 653 654 static void adm9240_init_client(struct i2c_client *client) 655 { 656 struct adm9240_data *data = i2c_get_clientdata(client); 657 u8 conf = adm9240_read_value(client, ADM9240_REG_CONFIG); 658 u8 mode = adm9240_read_value(client, ADM9240_REG_TEMP_CONF) & 3; 659 660 data->vrm = i2c_which_vrm(); /* need this to report vid as mV */ 661 662 dev_info(&client->dev, "Using VRM: %d.%d\n", data->vrm / 10, 663 data->vrm % 10); 664 665 if (conf & 1) { /* measurement cycle running: report state */ 666 667 dev_info(&client->dev, "status: config 0x%02x mode %u\n", 668 conf, mode); 669 670 } else { /* cold start: open limits before starting chip */ 671 int i; 672 673 for (i = 0; i < 6; i++) 674 { 675 adm9240_write_value(client, 676 ADM9240_REG_IN_MIN(i), 0); 677 adm9240_write_value(client, 678 ADM9240_REG_IN_MAX(i), 255); 679 } 680 adm9240_write_value(client, ADM9240_REG_FAN_MIN(0), 255); 681 adm9240_write_value(client, ADM9240_REG_FAN_MIN(1), 255); 682 adm9240_write_value(client, ADM9240_REG_TEMP_HIGH, 127); 683 adm9240_write_value(client, ADM9240_REG_TEMP_HYST, 127); 684 685 /* start measurement cycle */ 686 adm9240_write_value(client, ADM9240_REG_CONFIG, 1); 687 688 dev_info(&client->dev, "cold start: config was 0x%02x " 689 "mode %u\n", conf, mode); 690 } 691 } 692 693 static struct adm9240_data *adm9240_update_device(struct device *dev) 694 { 695 struct i2c_client *client = to_i2c_client(dev); 696 struct adm9240_data *data = i2c_get_clientdata(client); 697 int i; 698 699 down(&data->update_lock); 700 701 /* minimum measurement cycle: 1.75 seconds */ 702 if (time_after(jiffies, data->last_updated_measure + (HZ * 7 / 4)) 703 || !data->valid) { 704 705 for (i = 0; i < 6; i++) /* read voltages */ 706 { 707 data->in[i] = adm9240_read_value(client, 708 ADM9240_REG_IN(i)); 709 } 710 data->alarms = adm9240_read_value(client, 711 ADM9240_REG_INT(0)) | 712 adm9240_read_value(client, 713 ADM9240_REG_INT(1)) << 8; 714 715 /* read temperature: assume temperature changes less than 716 * 0.5'C per two measurement cycles thus ignore possible 717 * but unlikely aliasing error on lsb reading. --Grant */ 718 data->temp = ((adm9240_read_value(client, 719 ADM9240_REG_TEMP) << 8) | 720 adm9240_read_value(client, 721 ADM9240_REG_TEMP_CONF)) / 128; 722 723 for (i = 0; i < 2; i++) /* read fans */ 724 { 725 data->fan[i] = adm9240_read_value(client, 726 ADM9240_REG_FAN(i)); 727 728 /* adjust fan clock divider on overflow */ 729 if (data->valid && data->fan[i] == 255 && 730 data->fan_div[i] < 3) { 731 732 adm9240_write_fan_div(client, i, 733 ++data->fan_div[i]); 734 735 /* adjust fan_min if active, but not to 0 */ 736 if (data->fan_min[i] < 255 && 737 data->fan_min[i] >= 2) 738 data->fan_min[i] /= 2; 739 } 740 } 741 data->last_updated_measure = jiffies; 742 } 743 744 /* minimum config reading cycle: 300 seconds */ 745 if (time_after(jiffies, data->last_updated_config + (HZ * 300)) 746 || !data->valid) { 747 748 for (i = 0; i < 6; i++) 749 { 750 data->in_min[i] = adm9240_read_value(client, 751 ADM9240_REG_IN_MIN(i)); 752 data->in_max[i] = adm9240_read_value(client, 753 ADM9240_REG_IN_MAX(i)); 754 } 755 for (i = 0; i < 2; i++) 756 { 757 data->fan_min[i] = adm9240_read_value(client, 758 ADM9240_REG_FAN_MIN(i)); 759 } 760 data->temp_high = adm9240_read_value(client, 761 ADM9240_REG_TEMP_HIGH); 762 data->temp_hyst = adm9240_read_value(client, 763 ADM9240_REG_TEMP_HYST); 764 765 /* read fan divs and 5-bit VID */ 766 i = adm9240_read_value(client, ADM9240_REG_VID_FAN_DIV); 767 data->fan_div[0] = (i >> 4) & 3; 768 data->fan_div[1] = (i >> 6) & 3; 769 data->vid = i & 0x0f; 770 data->vid |= (adm9240_read_value(client, 771 ADM9240_REG_VID4) & 1) << 4; 772 /* read analog out */ 773 data->aout = adm9240_read_value(client, 774 ADM9240_REG_ANALOG_OUT); 775 776 data->last_updated_config = jiffies; 777 data->valid = 1; 778 } 779 up(&data->update_lock); 780 return data; 781 } 782 783 static int __init sensors_adm9240_init(void) 784 { 785 return i2c_add_driver(&adm9240_driver); 786 } 787 788 static void __exit sensors_adm9240_exit(void) 789 { 790 i2c_del_driver(&adm9240_driver); 791 } 792 793 MODULE_AUTHOR("Michiel Rook <michiel@grendelproject.nl>, " 794 "Grant Coady <gcoady@gmail.com> and others"); 795 MODULE_DESCRIPTION("ADM9240/DS1780/LM81 driver"); 796 MODULE_LICENSE("GPL"); 797 798 module_init(sensors_adm9240_init); 799 module_exit(sensors_adm9240_exit); 800 801