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 #include <linux/module.h> 40 #include <linux/slab.h> 41 #include <linux/i2c.h> 42 #include <linux/hwmon.h> 43 #include <linux/hwmon-sysfs.h> 44 #include <linux/hwmon-vid.h> 45 #include <linux/err.h> 46 #include <linux/init.h> 47 #include <linux/jiffies.h> 48 #include <linux/mutex.h> 49 #include "lm75.h" 50 51 /* I2C addresses to scan */ 52 static const unsigned short normal_i2c[] = { 0x2d, I2C_CLIENT_END }; 53 54 static unsigned short force_subclients[4]; 55 module_param_array(force_subclients, short, NULL, 0); 56 MODULE_PARM_DESC(force_subclients, "List of subclient addresses: " 57 "{bus, clientaddr, subclientaddr1, subclientaddr2}"); 58 59 /* Voltage IN registers 0-6 */ 60 #define ASB100_REG_IN(nr) (0x20 + (nr)) 61 #define ASB100_REG_IN_MAX(nr) (0x2b + (nr * 2)) 62 #define ASB100_REG_IN_MIN(nr) (0x2c + (nr * 2)) 63 64 /* FAN IN registers 1-3 */ 65 #define ASB100_REG_FAN(nr) (0x28 + (nr)) 66 #define ASB100_REG_FAN_MIN(nr) (0x3b + (nr)) 67 68 /* TEMPERATURE registers 1-4 */ 69 static const u16 asb100_reg_temp[] = {0, 0x27, 0x150, 0x250, 0x17}; 70 static const u16 asb100_reg_temp_max[] = {0, 0x39, 0x155, 0x255, 0x18}; 71 static const u16 asb100_reg_temp_hyst[] = {0, 0x3a, 0x153, 0x253, 0x19}; 72 73 #define ASB100_REG_TEMP(nr) (asb100_reg_temp[nr]) 74 #define ASB100_REG_TEMP_MAX(nr) (asb100_reg_temp_max[nr]) 75 #define ASB100_REG_TEMP_HYST(nr) (asb100_reg_temp_hyst[nr]) 76 77 #define ASB100_REG_TEMP2_CONFIG 0x0152 78 #define ASB100_REG_TEMP3_CONFIG 0x0252 79 80 81 #define ASB100_REG_CONFIG 0x40 82 #define ASB100_REG_ALARM1 0x41 83 #define ASB100_REG_ALARM2 0x42 84 #define ASB100_REG_SMIM1 0x43 85 #define ASB100_REG_SMIM2 0x44 86 #define ASB100_REG_VID_FANDIV 0x47 87 #define ASB100_REG_I2C_ADDR 0x48 88 #define ASB100_REG_CHIPID 0x49 89 #define ASB100_REG_I2C_SUBADDR 0x4a 90 #define ASB100_REG_PIN 0x4b 91 #define ASB100_REG_IRQ 0x4c 92 #define ASB100_REG_BANK 0x4e 93 #define ASB100_REG_CHIPMAN 0x4f 94 95 #define ASB100_REG_WCHIPID 0x58 96 97 /* bit 7 -> enable, bits 0-3 -> duty cycle */ 98 #define ASB100_REG_PWM1 0x59 99 100 /* CONVERSIONS 101 Rounding and limit checking is only done on the TO_REG variants. */ 102 103 /* These constants are a guess, consistent w/ w83781d */ 104 #define ASB100_IN_MIN ( 0) 105 #define ASB100_IN_MAX (4080) 106 107 /* IN: 1/1000 V (0V to 4.08V) 108 REG: 16mV/bit */ 109 static u8 IN_TO_REG(unsigned val) 110 { 111 unsigned nval = SENSORS_LIMIT(val, ASB100_IN_MIN, ASB100_IN_MAX); 112 return (nval + 8) / 16; 113 } 114 115 static unsigned IN_FROM_REG(u8 reg) 116 { 117 return reg * 16; 118 } 119 120 static u8 FAN_TO_REG(long rpm, int div) 121 { 122 if (rpm == -1) 123 return 0; 124 if (rpm == 0) 125 return 255; 126 rpm = SENSORS_LIMIT(rpm, 1, 1000000); 127 return SENSORS_LIMIT((1350000 + rpm * div / 2) / (rpm * div), 1, 254); 128 } 129 130 static int FAN_FROM_REG(u8 val, int div) 131 { 132 return val==0 ? -1 : val==255 ? 0 : 1350000/(val*div); 133 } 134 135 /* These constants are a guess, consistent w/ w83781d */ 136 #define ASB100_TEMP_MIN (-128000) 137 #define ASB100_TEMP_MAX ( 127000) 138 139 /* TEMP: 0.001C/bit (-128C to +127C) 140 REG: 1C/bit, two's complement */ 141 static u8 TEMP_TO_REG(long temp) 142 { 143 int ntemp = SENSORS_LIMIT(temp, ASB100_TEMP_MIN, ASB100_TEMP_MAX); 144 ntemp += (ntemp<0 ? -500 : 500); 145 return (u8)(ntemp / 1000); 146 } 147 148 static int TEMP_FROM_REG(u8 reg) 149 { 150 return (s8)reg * 1000; 151 } 152 153 /* PWM: 0 - 255 per sensors documentation 154 REG: (6.25% duty cycle per bit) */ 155 static u8 ASB100_PWM_TO_REG(int pwm) 156 { 157 pwm = SENSORS_LIMIT(pwm, 0, 255); 158 return (u8)(pwm / 16); 159 } 160 161 static int ASB100_PWM_FROM_REG(u8 reg) 162 { 163 return reg * 16; 164 } 165 166 #define DIV_FROM_REG(val) (1 << (val)) 167 168 /* FAN DIV: 1, 2, 4, or 8 (defaults to 2) 169 REG: 0, 1, 2, or 3 (respectively) (defaults to 1) */ 170 static u8 DIV_TO_REG(long val) 171 { 172 return val==8 ? 3 : val==4 ? 2 : val==1 ? 0 : 1; 173 } 174 175 /* For each registered client, we need to keep some data in memory. That 176 data is pointed to by client->data. The structure itself is 177 dynamically allocated, at the same time the client itself is allocated. */ 178 struct asb100_data { 179 struct device *hwmon_dev; 180 struct mutex lock; 181 182 struct mutex update_lock; 183 unsigned long last_updated; /* In jiffies */ 184 185 /* array of 2 pointers to subclients */ 186 struct i2c_client *lm75[2]; 187 188 char valid; /* !=0 if following fields are valid */ 189 u8 in[7]; /* Register value */ 190 u8 in_max[7]; /* Register value */ 191 u8 in_min[7]; /* Register value */ 192 u8 fan[3]; /* Register value */ 193 u8 fan_min[3]; /* Register value */ 194 u16 temp[4]; /* Register value (0 and 3 are u8 only) */ 195 u16 temp_max[4]; /* Register value (0 and 3 are u8 only) */ 196 u16 temp_hyst[4]; /* Register value (0 and 3 are u8 only) */ 197 u8 fan_div[3]; /* Register encoding, right justified */ 198 u8 pwm; /* Register encoding */ 199 u8 vid; /* Register encoding, combined */ 200 u32 alarms; /* Register encoding, combined */ 201 u8 vrm; 202 }; 203 204 static int asb100_read_value(struct i2c_client *client, u16 reg); 205 static void asb100_write_value(struct i2c_client *client, u16 reg, u16 val); 206 207 static int asb100_probe(struct i2c_client *client, 208 const struct i2c_device_id *id); 209 static int asb100_detect(struct i2c_client *client, 210 struct i2c_board_info *info); 211 static int asb100_remove(struct i2c_client *client); 212 static struct asb100_data *asb100_update_device(struct device *dev); 213 static void asb100_init_client(struct i2c_client *client); 214 215 static const struct i2c_device_id asb100_id[] = { 216 { "asb100", 0 }, 217 { } 218 }; 219 MODULE_DEVICE_TABLE(i2c, asb100_id); 220 221 static struct i2c_driver asb100_driver = { 222 .class = I2C_CLASS_HWMON, 223 .driver = { 224 .name = "asb100", 225 }, 226 .probe = asb100_probe, 227 .remove = asb100_remove, 228 .id_table = asb100_id, 229 .detect = asb100_detect, 230 .address_list = normal_i2c, 231 }; 232 233 /* 7 Voltages */ 234 #define show_in_reg(reg) \ 235 static ssize_t show_##reg(struct device *dev, struct device_attribute *attr, \ 236 char *buf) \ 237 { \ 238 int nr = to_sensor_dev_attr(attr)->index; \ 239 struct asb100_data *data = asb100_update_device(dev); \ 240 return sprintf(buf, "%d\n", IN_FROM_REG(data->reg[nr])); \ 241 } 242 243 show_in_reg(in) 244 show_in_reg(in_min) 245 show_in_reg(in_max) 246 247 #define set_in_reg(REG, reg) \ 248 static ssize_t set_in_##reg(struct device *dev, struct device_attribute *attr, \ 249 const char *buf, size_t count) \ 250 { \ 251 int nr = to_sensor_dev_attr(attr)->index; \ 252 struct i2c_client *client = to_i2c_client(dev); \ 253 struct asb100_data *data = i2c_get_clientdata(client); \ 254 unsigned long val = simple_strtoul(buf, NULL, 10); \ 255 \ 256 mutex_lock(&data->update_lock); \ 257 data->in_##reg[nr] = IN_TO_REG(val); \ 258 asb100_write_value(client, ASB100_REG_IN_##REG(nr), \ 259 data->in_##reg[nr]); \ 260 mutex_unlock(&data->update_lock); \ 261 return count; \ 262 } 263 264 set_in_reg(MIN, min) 265 set_in_reg(MAX, max) 266 267 #define sysfs_in(offset) \ 268 static SENSOR_DEVICE_ATTR(in##offset##_input, S_IRUGO, \ 269 show_in, NULL, offset); \ 270 static SENSOR_DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \ 271 show_in_min, set_in_min, offset); \ 272 static SENSOR_DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \ 273 show_in_max, set_in_max, offset) 274 275 sysfs_in(0); 276 sysfs_in(1); 277 sysfs_in(2); 278 sysfs_in(3); 279 sysfs_in(4); 280 sysfs_in(5); 281 sysfs_in(6); 282 283 /* 3 Fans */ 284 static ssize_t show_fan(struct device *dev, struct device_attribute *attr, 285 char *buf) 286 { 287 int nr = to_sensor_dev_attr(attr)->index; 288 struct asb100_data *data = asb100_update_device(dev); 289 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[nr], 290 DIV_FROM_REG(data->fan_div[nr]))); 291 } 292 293 static ssize_t show_fan_min(struct device *dev, struct device_attribute *attr, 294 char *buf) 295 { 296 int nr = to_sensor_dev_attr(attr)->index; 297 struct asb100_data *data = asb100_update_device(dev); 298 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[nr], 299 DIV_FROM_REG(data->fan_div[nr]))); 300 } 301 302 static ssize_t show_fan_div(struct device *dev, struct device_attribute *attr, 303 char *buf) 304 { 305 int nr = to_sensor_dev_attr(attr)->index; 306 struct asb100_data *data = asb100_update_device(dev); 307 return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr])); 308 } 309 310 static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr, 311 const char *buf, size_t count) 312 { 313 int nr = to_sensor_dev_attr(attr)->index; 314 struct i2c_client *client = to_i2c_client(dev); 315 struct asb100_data *data = i2c_get_clientdata(client); 316 u32 val = simple_strtoul(buf, NULL, 10); 317 318 mutex_lock(&data->update_lock); 319 data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr])); 320 asb100_write_value(client, ASB100_REG_FAN_MIN(nr), data->fan_min[nr]); 321 mutex_unlock(&data->update_lock); 322 return count; 323 } 324 325 /* Note: we save and restore the fan minimum here, because its value is 326 determined in part by the fan divisor. This follows the principle of 327 least surprise; the user doesn't expect the fan minimum to change just 328 because the divisor changed. */ 329 static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr, 330 const char *buf, size_t count) 331 { 332 int nr = to_sensor_dev_attr(attr)->index; 333 struct i2c_client *client = to_i2c_client(dev); 334 struct asb100_data *data = i2c_get_clientdata(client); 335 unsigned long min; 336 unsigned long val = simple_strtoul(buf, NULL, 10); 337 int reg; 338 339 mutex_lock(&data->update_lock); 340 341 min = FAN_FROM_REG(data->fan_min[nr], 342 DIV_FROM_REG(data->fan_div[nr])); 343 data->fan_div[nr] = DIV_TO_REG(val); 344 345 switch (nr) { 346 case 0: /* fan 1 */ 347 reg = asb100_read_value(client, ASB100_REG_VID_FANDIV); 348 reg = (reg & 0xcf) | (data->fan_div[0] << 4); 349 asb100_write_value(client, ASB100_REG_VID_FANDIV, reg); 350 break; 351 352 case 1: /* fan 2 */ 353 reg = asb100_read_value(client, ASB100_REG_VID_FANDIV); 354 reg = (reg & 0x3f) | (data->fan_div[1] << 6); 355 asb100_write_value(client, ASB100_REG_VID_FANDIV, reg); 356 break; 357 358 case 2: /* fan 3 */ 359 reg = asb100_read_value(client, ASB100_REG_PIN); 360 reg = (reg & 0x3f) | (data->fan_div[2] << 6); 361 asb100_write_value(client, ASB100_REG_PIN, reg); 362 break; 363 } 364 365 data->fan_min[nr] = 366 FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr])); 367 asb100_write_value(client, ASB100_REG_FAN_MIN(nr), data->fan_min[nr]); 368 369 mutex_unlock(&data->update_lock); 370 371 return count; 372 } 373 374 #define sysfs_fan(offset) \ 375 static SENSOR_DEVICE_ATTR(fan##offset##_input, S_IRUGO, \ 376 show_fan, NULL, offset - 1); \ 377 static SENSOR_DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \ 378 show_fan_min, set_fan_min, offset - 1); \ 379 static SENSOR_DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR, \ 380 show_fan_div, set_fan_div, offset - 1) 381 382 sysfs_fan(1); 383 sysfs_fan(2); 384 sysfs_fan(3); 385 386 /* 4 Temp. Sensors */ 387 static int sprintf_temp_from_reg(u16 reg, char *buf, int nr) 388 { 389 int ret = 0; 390 391 switch (nr) { 392 case 1: case 2: 393 ret = sprintf(buf, "%d\n", LM75_TEMP_FROM_REG(reg)); 394 break; 395 case 0: case 3: default: 396 ret = sprintf(buf, "%d\n", TEMP_FROM_REG(reg)); 397 break; 398 } 399 return ret; 400 } 401 402 #define show_temp_reg(reg) \ 403 static ssize_t show_##reg(struct device *dev, struct device_attribute *attr, \ 404 char *buf) \ 405 { \ 406 int nr = to_sensor_dev_attr(attr)->index; \ 407 struct asb100_data *data = asb100_update_device(dev); \ 408 return sprintf_temp_from_reg(data->reg[nr], buf, nr); \ 409 } 410 411 show_temp_reg(temp); 412 show_temp_reg(temp_max); 413 show_temp_reg(temp_hyst); 414 415 #define set_temp_reg(REG, reg) \ 416 static ssize_t set_##reg(struct device *dev, struct device_attribute *attr, \ 417 const char *buf, size_t count) \ 418 { \ 419 int nr = to_sensor_dev_attr(attr)->index; \ 420 struct i2c_client *client = to_i2c_client(dev); \ 421 struct asb100_data *data = i2c_get_clientdata(client); \ 422 long val = simple_strtol(buf, NULL, 10); \ 423 \ 424 mutex_lock(&data->update_lock); \ 425 switch (nr) { \ 426 case 1: case 2: \ 427 data->reg[nr] = LM75_TEMP_TO_REG(val); \ 428 break; \ 429 case 0: case 3: default: \ 430 data->reg[nr] = TEMP_TO_REG(val); \ 431 break; \ 432 } \ 433 asb100_write_value(client, ASB100_REG_TEMP_##REG(nr+1), \ 434 data->reg[nr]); \ 435 mutex_unlock(&data->update_lock); \ 436 return count; \ 437 } 438 439 set_temp_reg(MAX, temp_max); 440 set_temp_reg(HYST, temp_hyst); 441 442 #define sysfs_temp(num) \ 443 static SENSOR_DEVICE_ATTR(temp##num##_input, S_IRUGO, \ 444 show_temp, NULL, num - 1); \ 445 static SENSOR_DEVICE_ATTR(temp##num##_max, S_IRUGO | S_IWUSR, \ 446 show_temp_max, set_temp_max, num - 1); \ 447 static SENSOR_DEVICE_ATTR(temp##num##_max_hyst, S_IRUGO | S_IWUSR, \ 448 show_temp_hyst, set_temp_hyst, num - 1) 449 450 sysfs_temp(1); 451 sysfs_temp(2); 452 sysfs_temp(3); 453 sysfs_temp(4); 454 455 /* VID */ 456 static ssize_t show_vid(struct device *dev, struct device_attribute *attr, 457 char *buf) 458 { 459 struct asb100_data *data = asb100_update_device(dev); 460 return sprintf(buf, "%d\n", vid_from_reg(data->vid, data->vrm)); 461 } 462 463 static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid, NULL); 464 465 /* VRM */ 466 static ssize_t show_vrm(struct device *dev, struct device_attribute *attr, 467 char *buf) 468 { 469 struct asb100_data *data = dev_get_drvdata(dev); 470 return sprintf(buf, "%d\n", data->vrm); 471 } 472 473 static ssize_t set_vrm(struct device *dev, struct device_attribute *attr, 474 const char *buf, size_t count) 475 { 476 struct asb100_data *data = dev_get_drvdata(dev); 477 data->vrm = simple_strtoul(buf, NULL, 10); 478 return count; 479 } 480 481 /* Alarms */ 482 static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm, set_vrm); 483 484 static ssize_t show_alarms(struct device *dev, struct device_attribute *attr, 485 char *buf) 486 { 487 struct asb100_data *data = asb100_update_device(dev); 488 return sprintf(buf, "%u\n", data->alarms); 489 } 490 491 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL); 492 493 static ssize_t show_alarm(struct device *dev, struct device_attribute *attr, 494 char *buf) 495 { 496 int bitnr = to_sensor_dev_attr(attr)->index; 497 struct asb100_data *data = asb100_update_device(dev); 498 return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1); 499 } 500 static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0); 501 static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 1); 502 static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 2); 503 static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 3); 504 static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 8); 505 static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 6); 506 static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 7); 507 static SENSOR_DEVICE_ATTR(fan3_alarm, S_IRUGO, show_alarm, NULL, 11); 508 static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 4); 509 static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 5); 510 static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL, 13); 511 512 /* 1 PWM */ 513 static ssize_t show_pwm1(struct device *dev, struct device_attribute *attr, 514 char *buf) 515 { 516 struct asb100_data *data = asb100_update_device(dev); 517 return sprintf(buf, "%d\n", ASB100_PWM_FROM_REG(data->pwm & 0x0f)); 518 } 519 520 static ssize_t set_pwm1(struct device *dev, struct device_attribute *attr, 521 const char *buf, size_t count) 522 { 523 struct i2c_client *client = to_i2c_client(dev); 524 struct asb100_data *data = i2c_get_clientdata(client); 525 unsigned long val = simple_strtoul(buf, NULL, 10); 526 527 mutex_lock(&data->update_lock); 528 data->pwm &= 0x80; /* keep the enable bit */ 529 data->pwm |= (0x0f & ASB100_PWM_TO_REG(val)); 530 asb100_write_value(client, ASB100_REG_PWM1, data->pwm); 531 mutex_unlock(&data->update_lock); 532 return count; 533 } 534 535 static ssize_t show_pwm_enable1(struct device *dev, 536 struct device_attribute *attr, char *buf) 537 { 538 struct asb100_data *data = asb100_update_device(dev); 539 return sprintf(buf, "%d\n", (data->pwm & 0x80) ? 1 : 0); 540 } 541 542 static ssize_t set_pwm_enable1(struct device *dev, 543 struct device_attribute *attr, const char *buf, size_t count) 544 { 545 struct i2c_client *client = to_i2c_client(dev); 546 struct asb100_data *data = i2c_get_clientdata(client); 547 unsigned long val = simple_strtoul(buf, NULL, 10); 548 549 mutex_lock(&data->update_lock); 550 data->pwm &= 0x0f; /* keep the duty cycle bits */ 551 data->pwm |= (val ? 0x80 : 0x00); 552 asb100_write_value(client, ASB100_REG_PWM1, data->pwm); 553 mutex_unlock(&data->update_lock); 554 return count; 555 } 556 557 static DEVICE_ATTR(pwm1, S_IRUGO | S_IWUSR, show_pwm1, set_pwm1); 558 static DEVICE_ATTR(pwm1_enable, S_IRUGO | S_IWUSR, 559 show_pwm_enable1, set_pwm_enable1); 560 561 static struct attribute *asb100_attributes[] = { 562 &sensor_dev_attr_in0_input.dev_attr.attr, 563 &sensor_dev_attr_in0_min.dev_attr.attr, 564 &sensor_dev_attr_in0_max.dev_attr.attr, 565 &sensor_dev_attr_in1_input.dev_attr.attr, 566 &sensor_dev_attr_in1_min.dev_attr.attr, 567 &sensor_dev_attr_in1_max.dev_attr.attr, 568 &sensor_dev_attr_in2_input.dev_attr.attr, 569 &sensor_dev_attr_in2_min.dev_attr.attr, 570 &sensor_dev_attr_in2_max.dev_attr.attr, 571 &sensor_dev_attr_in3_input.dev_attr.attr, 572 &sensor_dev_attr_in3_min.dev_attr.attr, 573 &sensor_dev_attr_in3_max.dev_attr.attr, 574 &sensor_dev_attr_in4_input.dev_attr.attr, 575 &sensor_dev_attr_in4_min.dev_attr.attr, 576 &sensor_dev_attr_in4_max.dev_attr.attr, 577 &sensor_dev_attr_in5_input.dev_attr.attr, 578 &sensor_dev_attr_in5_min.dev_attr.attr, 579 &sensor_dev_attr_in5_max.dev_attr.attr, 580 &sensor_dev_attr_in6_input.dev_attr.attr, 581 &sensor_dev_attr_in6_min.dev_attr.attr, 582 &sensor_dev_attr_in6_max.dev_attr.attr, 583 584 &sensor_dev_attr_fan1_input.dev_attr.attr, 585 &sensor_dev_attr_fan1_min.dev_attr.attr, 586 &sensor_dev_attr_fan1_div.dev_attr.attr, 587 &sensor_dev_attr_fan2_input.dev_attr.attr, 588 &sensor_dev_attr_fan2_min.dev_attr.attr, 589 &sensor_dev_attr_fan2_div.dev_attr.attr, 590 &sensor_dev_attr_fan3_input.dev_attr.attr, 591 &sensor_dev_attr_fan3_min.dev_attr.attr, 592 &sensor_dev_attr_fan3_div.dev_attr.attr, 593 594 &sensor_dev_attr_temp1_input.dev_attr.attr, 595 &sensor_dev_attr_temp1_max.dev_attr.attr, 596 &sensor_dev_attr_temp1_max_hyst.dev_attr.attr, 597 &sensor_dev_attr_temp2_input.dev_attr.attr, 598 &sensor_dev_attr_temp2_max.dev_attr.attr, 599 &sensor_dev_attr_temp2_max_hyst.dev_attr.attr, 600 &sensor_dev_attr_temp3_input.dev_attr.attr, 601 &sensor_dev_attr_temp3_max.dev_attr.attr, 602 &sensor_dev_attr_temp3_max_hyst.dev_attr.attr, 603 &sensor_dev_attr_temp4_input.dev_attr.attr, 604 &sensor_dev_attr_temp4_max.dev_attr.attr, 605 &sensor_dev_attr_temp4_max_hyst.dev_attr.attr, 606 607 &sensor_dev_attr_in0_alarm.dev_attr.attr, 608 &sensor_dev_attr_in1_alarm.dev_attr.attr, 609 &sensor_dev_attr_in2_alarm.dev_attr.attr, 610 &sensor_dev_attr_in3_alarm.dev_attr.attr, 611 &sensor_dev_attr_in4_alarm.dev_attr.attr, 612 &sensor_dev_attr_fan1_alarm.dev_attr.attr, 613 &sensor_dev_attr_fan2_alarm.dev_attr.attr, 614 &sensor_dev_attr_fan3_alarm.dev_attr.attr, 615 &sensor_dev_attr_temp1_alarm.dev_attr.attr, 616 &sensor_dev_attr_temp2_alarm.dev_attr.attr, 617 &sensor_dev_attr_temp3_alarm.dev_attr.attr, 618 619 &dev_attr_cpu0_vid.attr, 620 &dev_attr_vrm.attr, 621 &dev_attr_alarms.attr, 622 &dev_attr_pwm1.attr, 623 &dev_attr_pwm1_enable.attr, 624 625 NULL 626 }; 627 628 static const struct attribute_group asb100_group = { 629 .attrs = asb100_attributes, 630 }; 631 632 static int asb100_detect_subclients(struct i2c_client *client) 633 { 634 int i, id, err; 635 int address = client->addr; 636 unsigned short sc_addr[2]; 637 struct asb100_data *data = i2c_get_clientdata(client); 638 struct i2c_adapter *adapter = client->adapter; 639 640 id = i2c_adapter_id(adapter); 641 642 if (force_subclients[0] == id && force_subclients[1] == address) { 643 for (i = 2; i <= 3; i++) { 644 if (force_subclients[i] < 0x48 || 645 force_subclients[i] > 0x4f) { 646 dev_err(&client->dev, "invalid subclient " 647 "address %d; must be 0x48-0x4f\n", 648 force_subclients[i]); 649 err = -ENODEV; 650 goto ERROR_SC_2; 651 } 652 } 653 asb100_write_value(client, ASB100_REG_I2C_SUBADDR, 654 (force_subclients[2] & 0x07) | 655 ((force_subclients[3] & 0x07) << 4)); 656 sc_addr[0] = force_subclients[2]; 657 sc_addr[1] = force_subclients[3]; 658 } else { 659 int val = asb100_read_value(client, ASB100_REG_I2C_SUBADDR); 660 sc_addr[0] = 0x48 + (val & 0x07); 661 sc_addr[1] = 0x48 + ((val >> 4) & 0x07); 662 } 663 664 if (sc_addr[0] == sc_addr[1]) { 665 dev_err(&client->dev, "duplicate addresses 0x%x " 666 "for subclients\n", sc_addr[0]); 667 err = -ENODEV; 668 goto ERROR_SC_2; 669 } 670 671 data->lm75[0] = i2c_new_dummy(adapter, sc_addr[0]); 672 if (!data->lm75[0]) { 673 dev_err(&client->dev, "subclient %d registration " 674 "at address 0x%x failed.\n", 1, sc_addr[0]); 675 err = -ENOMEM; 676 goto ERROR_SC_2; 677 } 678 679 data->lm75[1] = i2c_new_dummy(adapter, sc_addr[1]); 680 if (!data->lm75[1]) { 681 dev_err(&client->dev, "subclient %d registration " 682 "at address 0x%x failed.\n", 2, sc_addr[1]); 683 err = -ENOMEM; 684 goto ERROR_SC_3; 685 } 686 687 return 0; 688 689 /* Undo inits in case of errors */ 690 ERROR_SC_3: 691 i2c_unregister_device(data->lm75[0]); 692 ERROR_SC_2: 693 return err; 694 } 695 696 /* Return 0 if detection is successful, -ENODEV otherwise */ 697 static int asb100_detect(struct i2c_client *client, 698 struct i2c_board_info *info) 699 { 700 struct i2c_adapter *adapter = client->adapter; 701 int val1, val2; 702 703 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) { 704 pr_debug("asb100.o: detect failed, " 705 "smbus byte data not supported!\n"); 706 return -ENODEV; 707 } 708 709 val1 = i2c_smbus_read_byte_data(client, ASB100_REG_BANK); 710 val2 = i2c_smbus_read_byte_data(client, ASB100_REG_CHIPMAN); 711 712 /* If we're in bank 0 */ 713 if ((!(val1 & 0x07)) && 714 /* Check for ASB100 ID (low byte) */ 715 (((!(val1 & 0x80)) && (val2 != 0x94)) || 716 /* Check for ASB100 ID (high byte ) */ 717 ((val1 & 0x80) && (val2 != 0x06)))) { 718 pr_debug("asb100: detect failed, bad chip id 0x%02x!\n", val2); 719 return -ENODEV; 720 } 721 722 /* Put it now into bank 0 and Vendor ID High Byte */ 723 i2c_smbus_write_byte_data(client, ASB100_REG_BANK, 724 (i2c_smbus_read_byte_data(client, ASB100_REG_BANK) & 0x78) 725 | 0x80); 726 727 /* Determine the chip type. */ 728 val1 = i2c_smbus_read_byte_data(client, ASB100_REG_WCHIPID); 729 val2 = i2c_smbus_read_byte_data(client, ASB100_REG_CHIPMAN); 730 731 if (val1 != 0x31 || val2 != 0x06) 732 return -ENODEV; 733 734 strlcpy(info->type, "asb100", I2C_NAME_SIZE); 735 736 return 0; 737 } 738 739 static int asb100_probe(struct i2c_client *client, 740 const struct i2c_device_id *id) 741 { 742 int err; 743 struct asb100_data *data; 744 745 data = kzalloc(sizeof(struct asb100_data), GFP_KERNEL); 746 if (!data) { 747 pr_debug("asb100.o: probe failed, kzalloc failed!\n"); 748 err = -ENOMEM; 749 goto ERROR0; 750 } 751 752 i2c_set_clientdata(client, data); 753 mutex_init(&data->lock); 754 mutex_init(&data->update_lock); 755 756 /* Attach secondary lm75 clients */ 757 err = asb100_detect_subclients(client); 758 if (err) 759 goto ERROR1; 760 761 /* Initialize the chip */ 762 asb100_init_client(client); 763 764 /* A few vars need to be filled upon startup */ 765 data->fan_min[0] = asb100_read_value(client, ASB100_REG_FAN_MIN(0)); 766 data->fan_min[1] = asb100_read_value(client, ASB100_REG_FAN_MIN(1)); 767 data->fan_min[2] = asb100_read_value(client, ASB100_REG_FAN_MIN(2)); 768 769 /* Register sysfs hooks */ 770 if ((err = sysfs_create_group(&client->dev.kobj, &asb100_group))) 771 goto ERROR3; 772 773 data->hwmon_dev = hwmon_device_register(&client->dev); 774 if (IS_ERR(data->hwmon_dev)) { 775 err = PTR_ERR(data->hwmon_dev); 776 goto ERROR4; 777 } 778 779 return 0; 780 781 ERROR4: 782 sysfs_remove_group(&client->dev.kobj, &asb100_group); 783 ERROR3: 784 i2c_unregister_device(data->lm75[1]); 785 i2c_unregister_device(data->lm75[0]); 786 ERROR1: 787 kfree(data); 788 ERROR0: 789 return err; 790 } 791 792 static int asb100_remove(struct i2c_client *client) 793 { 794 struct asb100_data *data = i2c_get_clientdata(client); 795 796 hwmon_device_unregister(data->hwmon_dev); 797 sysfs_remove_group(&client->dev.kobj, &asb100_group); 798 799 i2c_unregister_device(data->lm75[1]); 800 i2c_unregister_device(data->lm75[0]); 801 802 kfree(data); 803 804 return 0; 805 } 806 807 /* The SMBus locks itself, usually, but nothing may access the chip between 808 bank switches. */ 809 static int asb100_read_value(struct i2c_client *client, u16 reg) 810 { 811 struct asb100_data *data = i2c_get_clientdata(client); 812 struct i2c_client *cl; 813 int res, bank; 814 815 mutex_lock(&data->lock); 816 817 bank = (reg >> 8) & 0x0f; 818 if (bank > 2) 819 /* switch banks */ 820 i2c_smbus_write_byte_data(client, ASB100_REG_BANK, bank); 821 822 if (bank == 0 || bank > 2) { 823 res = i2c_smbus_read_byte_data(client, reg & 0xff); 824 } else { 825 /* switch to subclient */ 826 cl = data->lm75[bank - 1]; 827 828 /* convert from ISA to LM75 I2C addresses */ 829 switch (reg & 0xff) { 830 case 0x50: /* TEMP */ 831 res = swab16(i2c_smbus_read_word_data(cl, 0)); 832 break; 833 case 0x52: /* CONFIG */ 834 res = i2c_smbus_read_byte_data(cl, 1); 835 break; 836 case 0x53: /* HYST */ 837 res = swab16(i2c_smbus_read_word_data(cl, 2)); 838 break; 839 case 0x55: /* MAX */ 840 default: 841 res = swab16(i2c_smbus_read_word_data(cl, 3)); 842 break; 843 } 844 } 845 846 if (bank > 2) 847 i2c_smbus_write_byte_data(client, ASB100_REG_BANK, 0); 848 849 mutex_unlock(&data->lock); 850 851 return res; 852 } 853 854 static void asb100_write_value(struct i2c_client *client, u16 reg, u16 value) 855 { 856 struct asb100_data *data = i2c_get_clientdata(client); 857 struct i2c_client *cl; 858 int bank; 859 860 mutex_lock(&data->lock); 861 862 bank = (reg >> 8) & 0x0f; 863 if (bank > 2) 864 /* switch banks */ 865 i2c_smbus_write_byte_data(client, ASB100_REG_BANK, bank); 866 867 if (bank == 0 || bank > 2) { 868 i2c_smbus_write_byte_data(client, reg & 0xff, value & 0xff); 869 } else { 870 /* switch to subclient */ 871 cl = data->lm75[bank - 1]; 872 873 /* convert from ISA to LM75 I2C addresses */ 874 switch (reg & 0xff) { 875 case 0x52: /* CONFIG */ 876 i2c_smbus_write_byte_data(cl, 1, value & 0xff); 877 break; 878 case 0x53: /* HYST */ 879 i2c_smbus_write_word_data(cl, 2, swab16(value)); 880 break; 881 case 0x55: /* MAX */ 882 i2c_smbus_write_word_data(cl, 3, swab16(value)); 883 break; 884 } 885 } 886 887 if (bank > 2) 888 i2c_smbus_write_byte_data(client, ASB100_REG_BANK, 0); 889 890 mutex_unlock(&data->lock); 891 } 892 893 static void asb100_init_client(struct i2c_client *client) 894 { 895 struct asb100_data *data = i2c_get_clientdata(client); 896 897 data->vrm = vid_which_vrm(); 898 899 /* Start monitoring */ 900 asb100_write_value(client, ASB100_REG_CONFIG, 901 (asb100_read_value(client, ASB100_REG_CONFIG) & 0xf7) | 0x01); 902 } 903 904 static struct asb100_data *asb100_update_device(struct device *dev) 905 { 906 struct i2c_client *client = to_i2c_client(dev); 907 struct asb100_data *data = i2c_get_clientdata(client); 908 int i; 909 910 mutex_lock(&data->update_lock); 911 912 if (time_after(jiffies, data->last_updated + HZ + HZ / 2) 913 || !data->valid) { 914 915 dev_dbg(&client->dev, "starting device update...\n"); 916 917 /* 7 voltage inputs */ 918 for (i = 0; i < 7; i++) { 919 data->in[i] = asb100_read_value(client, 920 ASB100_REG_IN(i)); 921 data->in_min[i] = asb100_read_value(client, 922 ASB100_REG_IN_MIN(i)); 923 data->in_max[i] = asb100_read_value(client, 924 ASB100_REG_IN_MAX(i)); 925 } 926 927 /* 3 fan inputs */ 928 for (i = 0; i < 3; i++) { 929 data->fan[i] = asb100_read_value(client, 930 ASB100_REG_FAN(i)); 931 data->fan_min[i] = asb100_read_value(client, 932 ASB100_REG_FAN_MIN(i)); 933 } 934 935 /* 4 temperature inputs */ 936 for (i = 1; i <= 4; i++) { 937 data->temp[i-1] = asb100_read_value(client, 938 ASB100_REG_TEMP(i)); 939 data->temp_max[i-1] = asb100_read_value(client, 940 ASB100_REG_TEMP_MAX(i)); 941 data->temp_hyst[i-1] = asb100_read_value(client, 942 ASB100_REG_TEMP_HYST(i)); 943 } 944 945 /* VID and fan divisors */ 946 i = asb100_read_value(client, ASB100_REG_VID_FANDIV); 947 data->vid = i & 0x0f; 948 data->vid |= (asb100_read_value(client, 949 ASB100_REG_CHIPID) & 0x01) << 4; 950 data->fan_div[0] = (i >> 4) & 0x03; 951 data->fan_div[1] = (i >> 6) & 0x03; 952 data->fan_div[2] = (asb100_read_value(client, 953 ASB100_REG_PIN) >> 6) & 0x03; 954 955 /* PWM */ 956 data->pwm = asb100_read_value(client, ASB100_REG_PWM1); 957 958 /* alarms */ 959 data->alarms = asb100_read_value(client, ASB100_REG_ALARM1) + 960 (asb100_read_value(client, ASB100_REG_ALARM2) << 8); 961 962 data->last_updated = jiffies; 963 data->valid = 1; 964 965 dev_dbg(&client->dev, "... device update complete\n"); 966 } 967 968 mutex_unlock(&data->update_lock); 969 970 return data; 971 } 972 973 static int __init asb100_init(void) 974 { 975 return i2c_add_driver(&asb100_driver); 976 } 977 978 static void __exit asb100_exit(void) 979 { 980 i2c_del_driver(&asb100_driver); 981 } 982 983 MODULE_AUTHOR("Mark M. Hoffman <mhoffman@lightlink.com>"); 984 MODULE_DESCRIPTION("ASB100 Bach driver"); 985 MODULE_LICENSE("GPL"); 986 987 module_init(asb100_init); 988 module_exit(asb100_exit); 989