1/* 2 * asb100.c - Part of lm_sensors, Linux kernel modules for hardware 3 * monitoring 4 * 5 * Copyright (C) 2004 Mark M. Hoffman <mhoffman@lightlink.com> 6 * 7 * (derived from w83781d.c) 8 * 9 * Copyright (C) 1998 - 2003 Frodo Looijaard <frodol@dds.nl>, 10 * Philip Edelbrock <phil@netroedge.com>, and 11 * Mark Studebaker <mdsxyz123@yahoo.com> 12 * 13 * This program is free software; you can redistribute it and/or modify 14 * it under the terms of the GNU General Public License as published by 15 * the Free Software Foundation; either version 2 of the License, or 16 * (at your option) any later version. 17 * 18 * This program is distributed in the hope that it will be useful, 19 * but WITHOUT ANY WARRANTY; without even the implied warranty of 20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 21 * GNU General Public License for more details. 22 * 23 * You should have received a copy of the GNU General Public License 24 * along with this program; if not, write to the Free Software 25 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 26 */ 27 28/* 29 * This driver supports the hardware sensor chips: Asus ASB100 and 30 * ASB100-A "BACH". 31 * 32 * ASB100-A supports pwm1, while plain ASB100 does not. There is no known 33 * way for the driver to tell which one is there. 34 * 35 * Chip #vin #fanin #pwm #temp wchipid vendid i2c ISA 36 * asb100 7 3 1 4 0x31 0x0694 yes no 37 */ 38 39#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 40 41#include <linux/module.h> 42#include <linux/slab.h> 43#include <linux/i2c.h> 44#include <linux/hwmon.h> 45#include <linux/hwmon-sysfs.h> 46#include <linux/hwmon-vid.h> 47#include <linux/err.h> 48#include <linux/init.h> 49#include <linux/jiffies.h> 50#include <linux/mutex.h> 51#include "lm75.h" 52 53/* I2C addresses to scan */ 54static const unsigned short normal_i2c[] = { 0x2d, I2C_CLIENT_END }; 55 56static unsigned short force_subclients[4]; 57module_param_array(force_subclients, short, NULL, 0); 58MODULE_PARM_DESC(force_subclients, 59 "List of subclient addresses: {bus, clientaddr, subclientaddr1, subclientaddr2}"); 60 61/* Voltage IN registers 0-6 */ 62#define ASB100_REG_IN(nr) (0x20 + (nr)) 63#define ASB100_REG_IN_MAX(nr) (0x2b + (nr * 2)) 64#define ASB100_REG_IN_MIN(nr) (0x2c + (nr * 2)) 65 66/* FAN IN registers 1-3 */ 67#define ASB100_REG_FAN(nr) (0x28 + (nr)) 68#define ASB100_REG_FAN_MIN(nr) (0x3b + (nr)) 69 70/* TEMPERATURE registers 1-4 */ 71static const u16 asb100_reg_temp[] = {0, 0x27, 0x150, 0x250, 0x17}; 72static const u16 asb100_reg_temp_max[] = {0, 0x39, 0x155, 0x255, 0x18}; 73static const u16 asb100_reg_temp_hyst[] = {0, 0x3a, 0x153, 0x253, 0x19}; 74 75#define ASB100_REG_TEMP(nr) (asb100_reg_temp[nr]) 76#define ASB100_REG_TEMP_MAX(nr) (asb100_reg_temp_max[nr]) 77#define ASB100_REG_TEMP_HYST(nr) (asb100_reg_temp_hyst[nr]) 78 79#define ASB100_REG_TEMP2_CONFIG 0x0152 80#define ASB100_REG_TEMP3_CONFIG 0x0252 81 82 83#define ASB100_REG_CONFIG 0x40 84#define ASB100_REG_ALARM1 0x41 85#define ASB100_REG_ALARM2 0x42 86#define ASB100_REG_SMIM1 0x43 87#define ASB100_REG_SMIM2 0x44 88#define ASB100_REG_VID_FANDIV 0x47 89#define ASB100_REG_I2C_ADDR 0x48 90#define ASB100_REG_CHIPID 0x49 91#define ASB100_REG_I2C_SUBADDR 0x4a 92#define ASB100_REG_PIN 0x4b 93#define ASB100_REG_IRQ 0x4c 94#define ASB100_REG_BANK 0x4e 95#define ASB100_REG_CHIPMAN 0x4f 96 97#define ASB100_REG_WCHIPID 0x58 98 99/* bit 7 -> enable, bits 0-3 -> duty cycle */ 100#define ASB100_REG_PWM1 0x59 101 102/* 103 * CONVERSIONS 104 * Rounding and limit checking is only done on the TO_REG variants. 105 */ 106 107/* These constants are a guess, consistent w/ w83781d */ 108#define ASB100_IN_MIN 0 109#define ASB100_IN_MAX 4080 110 111/* 112 * IN: 1/1000 V (0V to 4.08V) 113 * REG: 16mV/bit 114 */ 115static u8 IN_TO_REG(unsigned val) 116{ 117 unsigned nval = clamp_val(val, ASB100_IN_MIN, ASB100_IN_MAX); 118 return (nval + 8) / 16; 119} 120 121static unsigned IN_FROM_REG(u8 reg) 122{ 123 return reg * 16; 124} 125 126static u8 FAN_TO_REG(long rpm, int div) 127{ 128 if (rpm == -1) 129 return 0; 130 if (rpm == 0) 131 return 255; 132 rpm = clamp_val(rpm, 1, 1000000); 133 return clamp_val((1350000 + rpm * div / 2) / (rpm * div), 1, 254); 134} 135 136static int FAN_FROM_REG(u8 val, int div) 137{ 138 return val == 0 ? -1 : val == 255 ? 0 : 1350000 / (val * div); 139} 140 141/* These constants are a guess, consistent w/ w83781d */ 142#define ASB100_TEMP_MIN -128000 143#define ASB100_TEMP_MAX 127000 144 145/* 146 * TEMP: 0.001C/bit (-128C to +127C) 147 * REG: 1C/bit, two's complement 148 */ 149static u8 TEMP_TO_REG(long temp) 150{ 151 int ntemp = clamp_val(temp, ASB100_TEMP_MIN, ASB100_TEMP_MAX); 152 ntemp += (ntemp < 0 ? -500 : 500); 153 return (u8)(ntemp / 1000); 154} 155 156static int TEMP_FROM_REG(u8 reg) 157{ 158 return (s8)reg * 1000; 159} 160 161/* 162 * PWM: 0 - 255 per sensors documentation 163 * REG: (6.25% duty cycle per bit) 164 */ 165static u8 ASB100_PWM_TO_REG(int pwm) 166{ 167 pwm = clamp_val(pwm, 0, 255); 168 return (u8)(pwm / 16); 169} 170 171static int ASB100_PWM_FROM_REG(u8 reg) 172{ 173 return reg * 16; 174} 175 176#define DIV_FROM_REG(val) (1 << (val)) 177 178/* 179 * FAN DIV: 1, 2, 4, or 8 (defaults to 2) 180 * REG: 0, 1, 2, or 3 (respectively) (defaults to 1) 181 */ 182static u8 DIV_TO_REG(long val) 183{ 184 return val == 8 ? 3 : val == 4 ? 2 : val == 1 ? 0 : 1; 185} 186 187/* 188 * For each registered client, we need to keep some data in memory. That 189 * data is pointed to by client->data. The structure itself is 190 * dynamically allocated, at the same time the client itself is allocated. 191 */ 192struct asb100_data { 193 struct device *hwmon_dev; 194 struct mutex lock; 195 196 struct mutex update_lock; 197 unsigned long last_updated; /* In jiffies */ 198 199 /* array of 2 pointers to subclients */ 200 struct i2c_client *lm75[2]; 201 202 char valid; /* !=0 if following fields are valid */ 203 u8 in[7]; /* Register value */ 204 u8 in_max[7]; /* Register value */ 205 u8 in_min[7]; /* Register value */ 206 u8 fan[3]; /* Register value */ 207 u8 fan_min[3]; /* Register value */ 208 u16 temp[4]; /* Register value (0 and 3 are u8 only) */ 209 u16 temp_max[4]; /* Register value (0 and 3 are u8 only) */ 210 u16 temp_hyst[4]; /* Register value (0 and 3 are u8 only) */ 211 u8 fan_div[3]; /* Register encoding, right justified */ 212 u8 pwm; /* Register encoding */ 213 u8 vid; /* Register encoding, combined */ 214 u32 alarms; /* Register encoding, combined */ 215 u8 vrm; 216}; 217 218static int asb100_read_value(struct i2c_client *client, u16 reg); 219static void asb100_write_value(struct i2c_client *client, u16 reg, u16 val); 220 221static int asb100_probe(struct i2c_client *client, 222 const struct i2c_device_id *id); 223static int asb100_detect(struct i2c_client *client, 224 struct i2c_board_info *info); 225static int asb100_remove(struct i2c_client *client); 226static struct asb100_data *asb100_update_device(struct device *dev); 227static void asb100_init_client(struct i2c_client *client); 228 229static const struct i2c_device_id asb100_id[] = { 230 { "asb100", 0 }, 231 { } 232}; 233MODULE_DEVICE_TABLE(i2c, asb100_id); 234 235static struct i2c_driver asb100_driver = { 236 .class = I2C_CLASS_HWMON, 237 .driver = { 238 .name = "asb100", 239 }, 240 .probe = asb100_probe, 241 .remove = asb100_remove, 242 .id_table = asb100_id, 243 .detect = asb100_detect, 244 .address_list = normal_i2c, 245}; 246 247/* 7 Voltages */ 248#define show_in_reg(reg) \ 249static ssize_t show_##reg(struct device *dev, struct device_attribute *attr, \ 250 char *buf) \ 251{ \ 252 int nr = to_sensor_dev_attr(attr)->index; \ 253 struct asb100_data *data = asb100_update_device(dev); \ 254 return sprintf(buf, "%d\n", IN_FROM_REG(data->reg[nr])); \ 255} 256 257show_in_reg(in) 258show_in_reg(in_min) 259show_in_reg(in_max) 260 261#define set_in_reg(REG, reg) \ 262static ssize_t set_in_##reg(struct device *dev, struct device_attribute *attr, \ 263 const char *buf, size_t count) \ 264{ \ 265 int nr = to_sensor_dev_attr(attr)->index; \ 266 struct i2c_client *client = to_i2c_client(dev); \ 267 struct asb100_data *data = i2c_get_clientdata(client); \ 268 unsigned long val; \ 269 int err = kstrtoul(buf, 10, &val); \ 270 if (err) \ 271 return err; \ 272 mutex_lock(&data->update_lock); \ 273 data->in_##reg[nr] = IN_TO_REG(val); \ 274 asb100_write_value(client, ASB100_REG_IN_##REG(nr), \ 275 data->in_##reg[nr]); \ 276 mutex_unlock(&data->update_lock); \ 277 return count; \ 278} 279 280set_in_reg(MIN, min) 281set_in_reg(MAX, max) 282 283#define sysfs_in(offset) \ 284static SENSOR_DEVICE_ATTR(in##offset##_input, S_IRUGO, \ 285 show_in, NULL, offset); \ 286static SENSOR_DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \ 287 show_in_min, set_in_min, offset); \ 288static SENSOR_DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \ 289 show_in_max, set_in_max, offset) 290 291sysfs_in(0); 292sysfs_in(1); 293sysfs_in(2); 294sysfs_in(3); 295sysfs_in(4); 296sysfs_in(5); 297sysfs_in(6); 298 299/* 3 Fans */ 300static ssize_t show_fan(struct device *dev, struct device_attribute *attr, 301 char *buf) 302{ 303 int nr = to_sensor_dev_attr(attr)->index; 304 struct asb100_data *data = asb100_update_device(dev); 305 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[nr], 306 DIV_FROM_REG(data->fan_div[nr]))); 307} 308 309static ssize_t show_fan_min(struct device *dev, struct device_attribute *attr, 310 char *buf) 311{ 312 int nr = to_sensor_dev_attr(attr)->index; 313 struct asb100_data *data = asb100_update_device(dev); 314 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[nr], 315 DIV_FROM_REG(data->fan_div[nr]))); 316} 317 318static ssize_t show_fan_div(struct device *dev, struct device_attribute *attr, 319 char *buf) 320{ 321 int nr = to_sensor_dev_attr(attr)->index; 322 struct asb100_data *data = asb100_update_device(dev); 323 return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr])); 324} 325 326static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr, 327 const char *buf, size_t count) 328{ 329 int nr = to_sensor_dev_attr(attr)->index; 330 struct i2c_client *client = to_i2c_client(dev); 331 struct asb100_data *data = i2c_get_clientdata(client); 332 unsigned long val; 333 int err; 334 335 err = kstrtoul(buf, 10, &val); 336 if (err) 337 return err; 338 339 mutex_lock(&data->update_lock); 340 data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr])); 341 asb100_write_value(client, ASB100_REG_FAN_MIN(nr), data->fan_min[nr]); 342 mutex_unlock(&data->update_lock); 343 return count; 344} 345 346/* 347 * Note: we save and restore the fan minimum here, because its value is 348 * determined in part by the fan divisor. This follows the principle of 349 * least surprise; the user doesn't expect the fan minimum to change just 350 * because the divisor changed. 351 */ 352static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr, 353 const char *buf, size_t count) 354{ 355 int nr = to_sensor_dev_attr(attr)->index; 356 struct i2c_client *client = to_i2c_client(dev); 357 struct asb100_data *data = i2c_get_clientdata(client); 358 unsigned long min; 359 int reg; 360 unsigned long val; 361 int err; 362 363 err = kstrtoul(buf, 10, &val); 364 if (err) 365 return err; 366 367 mutex_lock(&data->update_lock); 368 369 min = FAN_FROM_REG(data->fan_min[nr], 370 DIV_FROM_REG(data->fan_div[nr])); 371 data->fan_div[nr] = DIV_TO_REG(val); 372 373 switch (nr) { 374 case 0: /* fan 1 */ 375 reg = asb100_read_value(client, ASB100_REG_VID_FANDIV); 376 reg = (reg & 0xcf) | (data->fan_div[0] << 4); 377 asb100_write_value(client, ASB100_REG_VID_FANDIV, reg); 378 break; 379 380 case 1: /* fan 2 */ 381 reg = asb100_read_value(client, ASB100_REG_VID_FANDIV); 382 reg = (reg & 0x3f) | (data->fan_div[1] << 6); 383 asb100_write_value(client, ASB100_REG_VID_FANDIV, reg); 384 break; 385 386 case 2: /* fan 3 */ 387 reg = asb100_read_value(client, ASB100_REG_PIN); 388 reg = (reg & 0x3f) | (data->fan_div[2] << 6); 389 asb100_write_value(client, ASB100_REG_PIN, reg); 390 break; 391 } 392 393 data->fan_min[nr] = 394 FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr])); 395 asb100_write_value(client, ASB100_REG_FAN_MIN(nr), data->fan_min[nr]); 396 397 mutex_unlock(&data->update_lock); 398 399 return count; 400} 401 402#define sysfs_fan(offset) \ 403static SENSOR_DEVICE_ATTR(fan##offset##_input, S_IRUGO, \ 404 show_fan, NULL, offset - 1); \ 405static SENSOR_DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \ 406 show_fan_min, set_fan_min, offset - 1); \ 407static SENSOR_DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR, \ 408 show_fan_div, set_fan_div, offset - 1) 409 410sysfs_fan(1); 411sysfs_fan(2); 412sysfs_fan(3); 413 414/* 4 Temp. Sensors */ 415static int sprintf_temp_from_reg(u16 reg, char *buf, int nr) 416{ 417 int ret = 0; 418 419 switch (nr) { 420 case 1: case 2: 421 ret = sprintf(buf, "%d\n", LM75_TEMP_FROM_REG(reg)); 422 break; 423 case 0: case 3: default: 424 ret = sprintf(buf, "%d\n", TEMP_FROM_REG(reg)); 425 break; 426 } 427 return ret; 428} 429 430#define show_temp_reg(reg) \ 431static ssize_t show_##reg(struct device *dev, struct device_attribute *attr, \ 432 char *buf) \ 433{ \ 434 int nr = to_sensor_dev_attr(attr)->index; \ 435 struct asb100_data *data = asb100_update_device(dev); \ 436 return sprintf_temp_from_reg(data->reg[nr], buf, nr); \ 437} 438 439show_temp_reg(temp); 440show_temp_reg(temp_max); 441show_temp_reg(temp_hyst); 442 443#define set_temp_reg(REG, reg) \ 444static ssize_t set_##reg(struct device *dev, struct device_attribute *attr, \ 445 const char *buf, size_t count) \ 446{ \ 447 int nr = to_sensor_dev_attr(attr)->index; \ 448 struct i2c_client *client = to_i2c_client(dev); \ 449 struct asb100_data *data = i2c_get_clientdata(client); \ 450 long val; \ 451 int err = kstrtol(buf, 10, &val); \ 452 if (err) \ 453 return err; \ 454 mutex_lock(&data->update_lock); \ 455 switch (nr) { \ 456 case 1: case 2: \ 457 data->reg[nr] = LM75_TEMP_TO_REG(val); \ 458 break; \ 459 case 0: case 3: default: \ 460 data->reg[nr] = TEMP_TO_REG(val); \ 461 break; \ 462 } \ 463 asb100_write_value(client, ASB100_REG_TEMP_##REG(nr+1), \ 464 data->reg[nr]); \ 465 mutex_unlock(&data->update_lock); \ 466 return count; \ 467} 468 469set_temp_reg(MAX, temp_max); 470set_temp_reg(HYST, temp_hyst); 471 472#define sysfs_temp(num) \ 473static SENSOR_DEVICE_ATTR(temp##num##_input, S_IRUGO, \ 474 show_temp, NULL, num - 1); \ 475static SENSOR_DEVICE_ATTR(temp##num##_max, S_IRUGO | S_IWUSR, \ 476 show_temp_max, set_temp_max, num - 1); \ 477static SENSOR_DEVICE_ATTR(temp##num##_max_hyst, S_IRUGO | S_IWUSR, \ 478 show_temp_hyst, set_temp_hyst, num - 1) 479 480sysfs_temp(1); 481sysfs_temp(2); 482sysfs_temp(3); 483sysfs_temp(4); 484 485/* VID */ 486static ssize_t show_vid(struct device *dev, struct device_attribute *attr, 487 char *buf) 488{ 489 struct asb100_data *data = asb100_update_device(dev); 490 return sprintf(buf, "%d\n", vid_from_reg(data->vid, data->vrm)); 491} 492 493static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid, NULL); 494 495/* VRM */ 496static ssize_t show_vrm(struct device *dev, struct device_attribute *attr, 497 char *buf) 498{ 499 struct asb100_data *data = dev_get_drvdata(dev); 500 return sprintf(buf, "%d\n", data->vrm); 501} 502 503static ssize_t set_vrm(struct device *dev, struct device_attribute *attr, 504 const char *buf, size_t count) 505{ 506 struct asb100_data *data = dev_get_drvdata(dev); 507 unsigned long val; 508 int err; 509 510 err = kstrtoul(buf, 10, &val); 511 if (err) 512 return err; 513 514 if (val > 255) 515 return -EINVAL; 516 517 data->vrm = val; 518 return count; 519} 520 521/* Alarms */ 522static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm, set_vrm); 523 524static ssize_t show_alarms(struct device *dev, struct device_attribute *attr, 525 char *buf) 526{ 527 struct asb100_data *data = asb100_update_device(dev); 528 return sprintf(buf, "%u\n", data->alarms); 529} 530 531static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL); 532 533static ssize_t show_alarm(struct device *dev, struct device_attribute *attr, 534 char *buf) 535{ 536 int bitnr = to_sensor_dev_attr(attr)->index; 537 struct asb100_data *data = asb100_update_device(dev); 538 return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1); 539} 540static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0); 541static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 1); 542static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 2); 543static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 3); 544static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 8); 545static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 6); 546static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 7); 547static SENSOR_DEVICE_ATTR(fan3_alarm, S_IRUGO, show_alarm, NULL, 11); 548static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 4); 549static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 5); 550static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL, 13); 551 552/* 1 PWM */ 553static ssize_t show_pwm1(struct device *dev, struct device_attribute *attr, 554 char *buf) 555{ 556 struct asb100_data *data = asb100_update_device(dev); 557 return sprintf(buf, "%d\n", ASB100_PWM_FROM_REG(data->pwm & 0x0f)); 558} 559 560static ssize_t set_pwm1(struct device *dev, struct device_attribute *attr, 561 const char *buf, size_t count) 562{ 563 struct i2c_client *client = to_i2c_client(dev); 564 struct asb100_data *data = i2c_get_clientdata(client); 565 unsigned long val; 566 int err; 567 568 err = kstrtoul(buf, 10, &val); 569 if (err) 570 return err; 571 572 mutex_lock(&data->update_lock); 573 data->pwm &= 0x80; /* keep the enable bit */ 574 data->pwm |= (0x0f & ASB100_PWM_TO_REG(val)); 575 asb100_write_value(client, ASB100_REG_PWM1, data->pwm); 576 mutex_unlock(&data->update_lock); 577 return count; 578} 579 580static ssize_t show_pwm_enable1(struct device *dev, 581 struct device_attribute *attr, char *buf) 582{ 583 struct asb100_data *data = asb100_update_device(dev); 584 return sprintf(buf, "%d\n", (data->pwm & 0x80) ? 1 : 0); 585} 586 587static ssize_t set_pwm_enable1(struct device *dev, 588 struct device_attribute *attr, const char *buf, size_t count) 589{ 590 struct i2c_client *client = to_i2c_client(dev); 591 struct asb100_data *data = i2c_get_clientdata(client); 592 unsigned long val; 593 int err; 594 595 err = kstrtoul(buf, 10, &val); 596 if (err) 597 return err; 598 599 mutex_lock(&data->update_lock); 600 data->pwm &= 0x0f; /* keep the duty cycle bits */ 601 data->pwm |= (val ? 0x80 : 0x00); 602 asb100_write_value(client, ASB100_REG_PWM1, data->pwm); 603 mutex_unlock(&data->update_lock); 604 return count; 605} 606 607static DEVICE_ATTR(pwm1, S_IRUGO | S_IWUSR, show_pwm1, set_pwm1); 608static DEVICE_ATTR(pwm1_enable, S_IRUGO | S_IWUSR, 609 show_pwm_enable1, set_pwm_enable1); 610 611static struct attribute *asb100_attributes[] = { 612 &sensor_dev_attr_in0_input.dev_attr.attr, 613 &sensor_dev_attr_in0_min.dev_attr.attr, 614 &sensor_dev_attr_in0_max.dev_attr.attr, 615 &sensor_dev_attr_in1_input.dev_attr.attr, 616 &sensor_dev_attr_in1_min.dev_attr.attr, 617 &sensor_dev_attr_in1_max.dev_attr.attr, 618 &sensor_dev_attr_in2_input.dev_attr.attr, 619 &sensor_dev_attr_in2_min.dev_attr.attr, 620 &sensor_dev_attr_in2_max.dev_attr.attr, 621 &sensor_dev_attr_in3_input.dev_attr.attr, 622 &sensor_dev_attr_in3_min.dev_attr.attr, 623 &sensor_dev_attr_in3_max.dev_attr.attr, 624 &sensor_dev_attr_in4_input.dev_attr.attr, 625 &sensor_dev_attr_in4_min.dev_attr.attr, 626 &sensor_dev_attr_in4_max.dev_attr.attr, 627 &sensor_dev_attr_in5_input.dev_attr.attr, 628 &sensor_dev_attr_in5_min.dev_attr.attr, 629 &sensor_dev_attr_in5_max.dev_attr.attr, 630 &sensor_dev_attr_in6_input.dev_attr.attr, 631 &sensor_dev_attr_in6_min.dev_attr.attr, 632 &sensor_dev_attr_in6_max.dev_attr.attr, 633 634 &sensor_dev_attr_fan1_input.dev_attr.attr, 635 &sensor_dev_attr_fan1_min.dev_attr.attr, 636 &sensor_dev_attr_fan1_div.dev_attr.attr, 637 &sensor_dev_attr_fan2_input.dev_attr.attr, 638 &sensor_dev_attr_fan2_min.dev_attr.attr, 639 &sensor_dev_attr_fan2_div.dev_attr.attr, 640 &sensor_dev_attr_fan3_input.dev_attr.attr, 641 &sensor_dev_attr_fan3_min.dev_attr.attr, 642 &sensor_dev_attr_fan3_div.dev_attr.attr, 643 644 &sensor_dev_attr_temp1_input.dev_attr.attr, 645 &sensor_dev_attr_temp1_max.dev_attr.attr, 646 &sensor_dev_attr_temp1_max_hyst.dev_attr.attr, 647 &sensor_dev_attr_temp2_input.dev_attr.attr, 648 &sensor_dev_attr_temp2_max.dev_attr.attr, 649 &sensor_dev_attr_temp2_max_hyst.dev_attr.attr, 650 &sensor_dev_attr_temp3_input.dev_attr.attr, 651 &sensor_dev_attr_temp3_max.dev_attr.attr, 652 &sensor_dev_attr_temp3_max_hyst.dev_attr.attr, 653 &sensor_dev_attr_temp4_input.dev_attr.attr, 654 &sensor_dev_attr_temp4_max.dev_attr.attr, 655 &sensor_dev_attr_temp4_max_hyst.dev_attr.attr, 656 657 &sensor_dev_attr_in0_alarm.dev_attr.attr, 658 &sensor_dev_attr_in1_alarm.dev_attr.attr, 659 &sensor_dev_attr_in2_alarm.dev_attr.attr, 660 &sensor_dev_attr_in3_alarm.dev_attr.attr, 661 &sensor_dev_attr_in4_alarm.dev_attr.attr, 662 &sensor_dev_attr_fan1_alarm.dev_attr.attr, 663 &sensor_dev_attr_fan2_alarm.dev_attr.attr, 664 &sensor_dev_attr_fan3_alarm.dev_attr.attr, 665 &sensor_dev_attr_temp1_alarm.dev_attr.attr, 666 &sensor_dev_attr_temp2_alarm.dev_attr.attr, 667 &sensor_dev_attr_temp3_alarm.dev_attr.attr, 668 669 &dev_attr_cpu0_vid.attr, 670 &dev_attr_vrm.attr, 671 &dev_attr_alarms.attr, 672 &dev_attr_pwm1.attr, 673 &dev_attr_pwm1_enable.attr, 674 675 NULL 676}; 677 678static const struct attribute_group asb100_group = { 679 .attrs = asb100_attributes, 680}; 681 682static int asb100_detect_subclients(struct i2c_client *client) 683{ 684 int i, id, err; 685 int address = client->addr; 686 unsigned short sc_addr[2]; 687 struct asb100_data *data = i2c_get_clientdata(client); 688 struct i2c_adapter *adapter = client->adapter; 689 690 id = i2c_adapter_id(adapter); 691 692 if (force_subclients[0] == id && force_subclients[1] == address) { 693 for (i = 2; i <= 3; i++) { 694 if (force_subclients[i] < 0x48 || 695 force_subclients[i] > 0x4f) { 696 dev_err(&client->dev, 697 "invalid subclient address %d; must be 0x48-0x4f\n", 698 force_subclients[i]); 699 err = -ENODEV; 700 goto ERROR_SC_2; 701 } 702 } 703 asb100_write_value(client, ASB100_REG_I2C_SUBADDR, 704 (force_subclients[2] & 0x07) | 705 ((force_subclients[3] & 0x07) << 4)); 706 sc_addr[0] = force_subclients[2]; 707 sc_addr[1] = force_subclients[3]; 708 } else { 709 int val = asb100_read_value(client, ASB100_REG_I2C_SUBADDR); 710 sc_addr[0] = 0x48 + (val & 0x07); 711 sc_addr[1] = 0x48 + ((val >> 4) & 0x07); 712 } 713 714 if (sc_addr[0] == sc_addr[1]) { 715 dev_err(&client->dev, 716 "duplicate addresses 0x%x for subclients\n", 717 sc_addr[0]); 718 err = -ENODEV; 719 goto ERROR_SC_2; 720 } 721 722 data->lm75[0] = i2c_new_dummy(adapter, sc_addr[0]); 723 if (!data->lm75[0]) { 724 dev_err(&client->dev, 725 "subclient %d registration at address 0x%x failed.\n", 726 1, sc_addr[0]); 727 err = -ENOMEM; 728 goto ERROR_SC_2; 729 } 730 731 data->lm75[1] = i2c_new_dummy(adapter, sc_addr[1]); 732 if (!data->lm75[1]) { 733 dev_err(&client->dev, 734 "subclient %d registration at address 0x%x failed.\n", 735 2, sc_addr[1]); 736 err = -ENOMEM; 737 goto ERROR_SC_3; 738 } 739 740 return 0; 741 742/* Undo inits in case of errors */ 743ERROR_SC_3: 744 i2c_unregister_device(data->lm75[0]); 745ERROR_SC_2: 746 return err; 747} 748 749/* Return 0 if detection is successful, -ENODEV otherwise */ 750static int asb100_detect(struct i2c_client *client, 751 struct i2c_board_info *info) 752{ 753 struct i2c_adapter *adapter = client->adapter; 754 int val1, val2; 755 756 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) { 757 pr_debug("detect failed, smbus byte data not supported!\n"); 758 return -ENODEV; 759 } 760 761 val1 = i2c_smbus_read_byte_data(client, ASB100_REG_BANK); 762 val2 = i2c_smbus_read_byte_data(client, ASB100_REG_CHIPMAN); 763 764 /* If we're in bank 0 */ 765 if ((!(val1 & 0x07)) && 766 /* Check for ASB100 ID (low byte) */ 767 (((!(val1 & 0x80)) && (val2 != 0x94)) || 768 /* Check for ASB100 ID (high byte ) */ 769 ((val1 & 0x80) && (val2 != 0x06)))) { 770 pr_debug("detect failed, bad chip id 0x%02x!\n", val2); 771 return -ENODEV; 772 } 773 774 /* Put it now into bank 0 and Vendor ID High Byte */ 775 i2c_smbus_write_byte_data(client, ASB100_REG_BANK, 776 (i2c_smbus_read_byte_data(client, ASB100_REG_BANK) & 0x78) 777 | 0x80); 778 779 /* Determine the chip type. */ 780 val1 = i2c_smbus_read_byte_data(client, ASB100_REG_WCHIPID); 781 val2 = i2c_smbus_read_byte_data(client, ASB100_REG_CHIPMAN); 782 783 if (val1 != 0x31 || val2 != 0x06) 784 return -ENODEV; 785 786 strlcpy(info->type, "asb100", I2C_NAME_SIZE); 787 788 return 0; 789} 790 791static int asb100_probe(struct i2c_client *client, 792 const struct i2c_device_id *id) 793{ 794 int err; 795 struct asb100_data *data; 796 797 data = devm_kzalloc(&client->dev, sizeof(struct asb100_data), 798 GFP_KERNEL); 799 if (!data) 800 return -ENOMEM; 801 802 i2c_set_clientdata(client, data); 803 mutex_init(&data->lock); 804 mutex_init(&data->update_lock); 805 806 /* Attach secondary lm75 clients */ 807 err = asb100_detect_subclients(client); 808 if (err) 809 return err; 810 811 /* Initialize the chip */ 812 asb100_init_client(client); 813 814 /* A few vars need to be filled upon startup */ 815 data->fan_min[0] = asb100_read_value(client, ASB100_REG_FAN_MIN(0)); 816 data->fan_min[1] = asb100_read_value(client, ASB100_REG_FAN_MIN(1)); 817 data->fan_min[2] = asb100_read_value(client, ASB100_REG_FAN_MIN(2)); 818 819 /* Register sysfs hooks */ 820 err = sysfs_create_group(&client->dev.kobj, &asb100_group); 821 if (err) 822 goto ERROR3; 823 824 data->hwmon_dev = hwmon_device_register(&client->dev); 825 if (IS_ERR(data->hwmon_dev)) { 826 err = PTR_ERR(data->hwmon_dev); 827 goto ERROR4; 828 } 829 830 return 0; 831 832ERROR4: 833 sysfs_remove_group(&client->dev.kobj, &asb100_group); 834ERROR3: 835 i2c_unregister_device(data->lm75[1]); 836 i2c_unregister_device(data->lm75[0]); 837 return err; 838} 839 840static int asb100_remove(struct i2c_client *client) 841{ 842 struct asb100_data *data = i2c_get_clientdata(client); 843 844 hwmon_device_unregister(data->hwmon_dev); 845 sysfs_remove_group(&client->dev.kobj, &asb100_group); 846 847 i2c_unregister_device(data->lm75[1]); 848 i2c_unregister_device(data->lm75[0]); 849 850 return 0; 851} 852 853/* 854 * The SMBus locks itself, usually, but nothing may access the chip between 855 * bank switches. 856 */ 857static int asb100_read_value(struct i2c_client *client, u16 reg) 858{ 859 struct asb100_data *data = i2c_get_clientdata(client); 860 struct i2c_client *cl; 861 int res, bank; 862 863 mutex_lock(&data->lock); 864 865 bank = (reg >> 8) & 0x0f; 866 if (bank > 2) 867 /* switch banks */ 868 i2c_smbus_write_byte_data(client, ASB100_REG_BANK, bank); 869 870 if (bank == 0 || bank > 2) { 871 res = i2c_smbus_read_byte_data(client, reg & 0xff); 872 } else { 873 /* switch to subclient */ 874 cl = data->lm75[bank - 1]; 875 876 /* convert from ISA to LM75 I2C addresses */ 877 switch (reg & 0xff) { 878 case 0x50: /* TEMP */ 879 res = i2c_smbus_read_word_swapped(cl, 0); 880 break; 881 case 0x52: /* CONFIG */ 882 res = i2c_smbus_read_byte_data(cl, 1); 883 break; 884 case 0x53: /* HYST */ 885 res = i2c_smbus_read_word_swapped(cl, 2); 886 break; 887 case 0x55: /* MAX */ 888 default: 889 res = i2c_smbus_read_word_swapped(cl, 3); 890 break; 891 } 892 } 893 894 if (bank > 2) 895 i2c_smbus_write_byte_data(client, ASB100_REG_BANK, 0); 896 897 mutex_unlock(&data->lock); 898 899 return res; 900} 901 902static void asb100_write_value(struct i2c_client *client, u16 reg, u16 value) 903{ 904 struct asb100_data *data = i2c_get_clientdata(client); 905 struct i2c_client *cl; 906 int bank; 907 908 mutex_lock(&data->lock); 909 910 bank = (reg >> 8) & 0x0f; 911 if (bank > 2) 912 /* switch banks */ 913 i2c_smbus_write_byte_data(client, ASB100_REG_BANK, bank); 914 915 if (bank == 0 || bank > 2) { 916 i2c_smbus_write_byte_data(client, reg & 0xff, value & 0xff); 917 } else { 918 /* switch to subclient */ 919 cl = data->lm75[bank - 1]; 920 921 /* convert from ISA to LM75 I2C addresses */ 922 switch (reg & 0xff) { 923 case 0x52: /* CONFIG */ 924 i2c_smbus_write_byte_data(cl, 1, value & 0xff); 925 break; 926 case 0x53: /* HYST */ 927 i2c_smbus_write_word_swapped(cl, 2, value); 928 break; 929 case 0x55: /* MAX */ 930 i2c_smbus_write_word_swapped(cl, 3, value); 931 break; 932 } 933 } 934 935 if (bank > 2) 936 i2c_smbus_write_byte_data(client, ASB100_REG_BANK, 0); 937 938 mutex_unlock(&data->lock); 939} 940 941static void asb100_init_client(struct i2c_client *client) 942{ 943 struct asb100_data *data = i2c_get_clientdata(client); 944 945 data->vrm = vid_which_vrm(); 946 947 /* Start monitoring */ 948 asb100_write_value(client, ASB100_REG_CONFIG, 949 (asb100_read_value(client, ASB100_REG_CONFIG) & 0xf7) | 0x01); 950} 951 952static struct asb100_data *asb100_update_device(struct device *dev) 953{ 954 struct i2c_client *client = to_i2c_client(dev); 955 struct asb100_data *data = i2c_get_clientdata(client); 956 int i; 957 958 mutex_lock(&data->update_lock); 959 960 if (time_after(jiffies, data->last_updated + HZ + HZ / 2) 961 || !data->valid) { 962 963 dev_dbg(&client->dev, "starting device update...\n"); 964 965 /* 7 voltage inputs */ 966 for (i = 0; i < 7; i++) { 967 data->in[i] = asb100_read_value(client, 968 ASB100_REG_IN(i)); 969 data->in_min[i] = asb100_read_value(client, 970 ASB100_REG_IN_MIN(i)); 971 data->in_max[i] = asb100_read_value(client, 972 ASB100_REG_IN_MAX(i)); 973 } 974 975 /* 3 fan inputs */ 976 for (i = 0; i < 3; i++) { 977 data->fan[i] = asb100_read_value(client, 978 ASB100_REG_FAN(i)); 979 data->fan_min[i] = asb100_read_value(client, 980 ASB100_REG_FAN_MIN(i)); 981 } 982 983 /* 4 temperature inputs */ 984 for (i = 1; i <= 4; i++) { 985 data->temp[i-1] = asb100_read_value(client, 986 ASB100_REG_TEMP(i)); 987 data->temp_max[i-1] = asb100_read_value(client, 988 ASB100_REG_TEMP_MAX(i)); 989 data->temp_hyst[i-1] = asb100_read_value(client, 990 ASB100_REG_TEMP_HYST(i)); 991 } 992 993 /* VID and fan divisors */ 994 i = asb100_read_value(client, ASB100_REG_VID_FANDIV); 995 data->vid = i & 0x0f; 996 data->vid |= (asb100_read_value(client, 997 ASB100_REG_CHIPID) & 0x01) << 4; 998 data->fan_div[0] = (i >> 4) & 0x03; 999 data->fan_div[1] = (i >> 6) & 0x03; 1000 data->fan_div[2] = (asb100_read_value(client, 1001 ASB100_REG_PIN) >> 6) & 0x03; 1002 1003 /* PWM */ 1004 data->pwm = asb100_read_value(client, ASB100_REG_PWM1); 1005 1006 /* alarms */ 1007 data->alarms = asb100_read_value(client, ASB100_REG_ALARM1) + 1008 (asb100_read_value(client, ASB100_REG_ALARM2) << 8); 1009 1010 data->last_updated = jiffies; 1011 data->valid = 1; 1012 1013 dev_dbg(&client->dev, "... device update complete\n"); 1014 } 1015 1016 mutex_unlock(&data->update_lock); 1017 1018 return data; 1019} 1020 1021module_i2c_driver(asb100_driver); 1022 1023MODULE_AUTHOR("Mark M. Hoffman <mhoffman@lightlink.com>"); 1024MODULE_DESCRIPTION("ASB100 Bach driver"); 1025MODULE_LICENSE("GPL"); 1026