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 /* Insmod parameters */ 55 I2C_CLIENT_INSMOD_1(asb100); 56 57 static unsigned short force_subclients[4]; 58 module_param_array(force_subclients, short, NULL, 0); 59 MODULE_PARM_DESC(force_subclients, "List of subclient addresses: " 60 "{bus, clientaddr, subclientaddr1, subclientaddr2}"); 61 62 /* Voltage IN registers 0-6 */ 63 #define ASB100_REG_IN(nr) (0x20 + (nr)) 64 #define ASB100_REG_IN_MAX(nr) (0x2b + (nr * 2)) 65 #define ASB100_REG_IN_MIN(nr) (0x2c + (nr * 2)) 66 67 /* FAN IN registers 1-3 */ 68 #define ASB100_REG_FAN(nr) (0x28 + (nr)) 69 #define ASB100_REG_FAN_MIN(nr) (0x3b + (nr)) 70 71 /* TEMPERATURE registers 1-4 */ 72 static const u16 asb100_reg_temp[] = {0, 0x27, 0x150, 0x250, 0x17}; 73 static const u16 asb100_reg_temp_max[] = {0, 0x39, 0x155, 0x255, 0x18}; 74 static const u16 asb100_reg_temp_hyst[] = {0, 0x3a, 0x153, 0x253, 0x19}; 75 76 #define ASB100_REG_TEMP(nr) (asb100_reg_temp[nr]) 77 #define ASB100_REG_TEMP_MAX(nr) (asb100_reg_temp_max[nr]) 78 #define ASB100_REG_TEMP_HYST(nr) (asb100_reg_temp_hyst[nr]) 79 80 #define ASB100_REG_TEMP2_CONFIG 0x0152 81 #define ASB100_REG_TEMP3_CONFIG 0x0252 82 83 84 #define ASB100_REG_CONFIG 0x40 85 #define ASB100_REG_ALARM1 0x41 86 #define ASB100_REG_ALARM2 0x42 87 #define ASB100_REG_SMIM1 0x43 88 #define ASB100_REG_SMIM2 0x44 89 #define ASB100_REG_VID_FANDIV 0x47 90 #define ASB100_REG_I2C_ADDR 0x48 91 #define ASB100_REG_CHIPID 0x49 92 #define ASB100_REG_I2C_SUBADDR 0x4a 93 #define ASB100_REG_PIN 0x4b 94 #define ASB100_REG_IRQ 0x4c 95 #define ASB100_REG_BANK 0x4e 96 #define ASB100_REG_CHIPMAN 0x4f 97 98 #define ASB100_REG_WCHIPID 0x58 99 100 /* bit 7 -> enable, bits 0-3 -> duty cycle */ 101 #define ASB100_REG_PWM1 0x59 102 103 /* CONVERSIONS 104 Rounding and limit checking is only done on the TO_REG variants. */ 105 106 /* These constants are a guess, consistent w/ w83781d */ 107 #define ASB100_IN_MIN ( 0) 108 #define ASB100_IN_MAX (4080) 109 110 /* IN: 1/1000 V (0V to 4.08V) 111 REG: 16mV/bit */ 112 static u8 IN_TO_REG(unsigned val) 113 { 114 unsigned nval = SENSORS_LIMIT(val, ASB100_IN_MIN, ASB100_IN_MAX); 115 return (nval + 8) / 16; 116 } 117 118 static unsigned IN_FROM_REG(u8 reg) 119 { 120 return reg * 16; 121 } 122 123 static u8 FAN_TO_REG(long rpm, int div) 124 { 125 if (rpm == -1) 126 return 0; 127 if (rpm == 0) 128 return 255; 129 rpm = SENSORS_LIMIT(rpm, 1, 1000000); 130 return SENSORS_LIMIT((1350000 + rpm * div / 2) / (rpm * div), 1, 254); 131 } 132 133 static int FAN_FROM_REG(u8 val, int div) 134 { 135 return val==0 ? -1 : val==255 ? 0 : 1350000/(val*div); 136 } 137 138 /* These constants are a guess, consistent w/ w83781d */ 139 #define ASB100_TEMP_MIN (-128000) 140 #define ASB100_TEMP_MAX ( 127000) 141 142 /* TEMP: 0.001C/bit (-128C to +127C) 143 REG: 1C/bit, two's complement */ 144 static u8 TEMP_TO_REG(long temp) 145 { 146 int ntemp = SENSORS_LIMIT(temp, ASB100_TEMP_MIN, ASB100_TEMP_MAX); 147 ntemp += (ntemp<0 ? -500 : 500); 148 return (u8)(ntemp / 1000); 149 } 150 151 static int TEMP_FROM_REG(u8 reg) 152 { 153 return (s8)reg * 1000; 154 } 155 156 /* PWM: 0 - 255 per sensors documentation 157 REG: (6.25% duty cycle per bit) */ 158 static u8 ASB100_PWM_TO_REG(int pwm) 159 { 160 pwm = SENSORS_LIMIT(pwm, 0, 255); 161 return (u8)(pwm / 16); 162 } 163 164 static int ASB100_PWM_FROM_REG(u8 reg) 165 { 166 return reg * 16; 167 } 168 169 #define DIV_FROM_REG(val) (1 << (val)) 170 171 /* FAN DIV: 1, 2, 4, or 8 (defaults to 2) 172 REG: 0, 1, 2, or 3 (respectively) (defaults to 1) */ 173 static u8 DIV_TO_REG(long val) 174 { 175 return val==8 ? 3 : val==4 ? 2 : val==1 ? 0 : 1; 176 } 177 178 /* For each registered client, we need to keep some data in memory. That 179 data is pointed to by client->data. The structure itself is 180 dynamically allocated, at the same time the client itself is allocated. */ 181 struct asb100_data { 182 struct device *hwmon_dev; 183 struct mutex lock; 184 185 struct mutex update_lock; 186 unsigned long last_updated; /* In jiffies */ 187 188 /* array of 2 pointers to subclients */ 189 struct i2c_client *lm75[2]; 190 191 char valid; /* !=0 if following fields are valid */ 192 u8 in[7]; /* Register value */ 193 u8 in_max[7]; /* Register value */ 194 u8 in_min[7]; /* Register value */ 195 u8 fan[3]; /* Register value */ 196 u8 fan_min[3]; /* Register value */ 197 u16 temp[4]; /* Register value (0 and 3 are u8 only) */ 198 u16 temp_max[4]; /* Register value (0 and 3 are u8 only) */ 199 u16 temp_hyst[4]; /* Register value (0 and 3 are u8 only) */ 200 u8 fan_div[3]; /* Register encoding, right justified */ 201 u8 pwm; /* Register encoding */ 202 u8 vid; /* Register encoding, combined */ 203 u32 alarms; /* Register encoding, combined */ 204 u8 vrm; 205 }; 206 207 static int asb100_read_value(struct i2c_client *client, u16 reg); 208 static void asb100_write_value(struct i2c_client *client, u16 reg, u16 val); 209 210 static int asb100_probe(struct i2c_client *client, 211 const struct i2c_device_id *id); 212 static int asb100_detect(struct i2c_client *client, 213 struct i2c_board_info *info); 214 static int asb100_remove(struct i2c_client *client); 215 static struct asb100_data *asb100_update_device(struct device *dev); 216 static void asb100_init_client(struct i2c_client *client); 217 218 static const struct i2c_device_id asb100_id[] = { 219 { "asb100", asb100 }, 220 { } 221 }; 222 MODULE_DEVICE_TABLE(i2c, asb100_id); 223 224 static struct i2c_driver asb100_driver = { 225 .class = I2C_CLASS_HWMON, 226 .driver = { 227 .name = "asb100", 228 }, 229 .probe = asb100_probe, 230 .remove = asb100_remove, 231 .id_table = asb100_id, 232 .detect = asb100_detect, 233 .address_list = normal_i2c, 234 }; 235 236 /* 7 Voltages */ 237 #define show_in_reg(reg) \ 238 static ssize_t show_##reg(struct device *dev, struct device_attribute *attr, \ 239 char *buf) \ 240 { \ 241 int nr = to_sensor_dev_attr(attr)->index; \ 242 struct asb100_data *data = asb100_update_device(dev); \ 243 return sprintf(buf, "%d\n", IN_FROM_REG(data->reg[nr])); \ 244 } 245 246 show_in_reg(in) 247 show_in_reg(in_min) 248 show_in_reg(in_max) 249 250 #define set_in_reg(REG, reg) \ 251 static ssize_t set_in_##reg(struct device *dev, struct device_attribute *attr, \ 252 const char *buf, size_t count) \ 253 { \ 254 int nr = to_sensor_dev_attr(attr)->index; \ 255 struct i2c_client *client = to_i2c_client(dev); \ 256 struct asb100_data *data = i2c_get_clientdata(client); \ 257 unsigned long val = simple_strtoul(buf, NULL, 10); \ 258 \ 259 mutex_lock(&data->update_lock); \ 260 data->in_##reg[nr] = IN_TO_REG(val); \ 261 asb100_write_value(client, ASB100_REG_IN_##REG(nr), \ 262 data->in_##reg[nr]); \ 263 mutex_unlock(&data->update_lock); \ 264 return count; \ 265 } 266 267 set_in_reg(MIN, min) 268 set_in_reg(MAX, max) 269 270 #define sysfs_in(offset) \ 271 static SENSOR_DEVICE_ATTR(in##offset##_input, S_IRUGO, \ 272 show_in, NULL, offset); \ 273 static SENSOR_DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \ 274 show_in_min, set_in_min, offset); \ 275 static SENSOR_DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \ 276 show_in_max, set_in_max, offset) 277 278 sysfs_in(0); 279 sysfs_in(1); 280 sysfs_in(2); 281 sysfs_in(3); 282 sysfs_in(4); 283 sysfs_in(5); 284 sysfs_in(6); 285 286 /* 3 Fans */ 287 static ssize_t show_fan(struct device *dev, struct device_attribute *attr, 288 char *buf) 289 { 290 int nr = to_sensor_dev_attr(attr)->index; 291 struct asb100_data *data = asb100_update_device(dev); 292 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[nr], 293 DIV_FROM_REG(data->fan_div[nr]))); 294 } 295 296 static ssize_t show_fan_min(struct device *dev, struct device_attribute *attr, 297 char *buf) 298 { 299 int nr = to_sensor_dev_attr(attr)->index; 300 struct asb100_data *data = asb100_update_device(dev); 301 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[nr], 302 DIV_FROM_REG(data->fan_div[nr]))); 303 } 304 305 static ssize_t show_fan_div(struct device *dev, struct device_attribute *attr, 306 char *buf) 307 { 308 int nr = to_sensor_dev_attr(attr)->index; 309 struct asb100_data *data = asb100_update_device(dev); 310 return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr])); 311 } 312 313 static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr, 314 const char *buf, size_t count) 315 { 316 int nr = to_sensor_dev_attr(attr)->index; 317 struct i2c_client *client = to_i2c_client(dev); 318 struct asb100_data *data = i2c_get_clientdata(client); 319 u32 val = simple_strtoul(buf, NULL, 10); 320 321 mutex_lock(&data->update_lock); 322 data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr])); 323 asb100_write_value(client, ASB100_REG_FAN_MIN(nr), data->fan_min[nr]); 324 mutex_unlock(&data->update_lock); 325 return count; 326 } 327 328 /* Note: we save and restore the fan minimum here, because its value is 329 determined in part by the fan divisor. This follows the principle of 330 least surprise; the user doesn't expect the fan minimum to change just 331 because the divisor changed. */ 332 static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr, 333 const char *buf, size_t count) 334 { 335 int nr = to_sensor_dev_attr(attr)->index; 336 struct i2c_client *client = to_i2c_client(dev); 337 struct asb100_data *data = i2c_get_clientdata(client); 338 unsigned long min; 339 unsigned long val = simple_strtoul(buf, NULL, 10); 340 int reg; 341 342 mutex_lock(&data->update_lock); 343 344 min = FAN_FROM_REG(data->fan_min[nr], 345 DIV_FROM_REG(data->fan_div[nr])); 346 data->fan_div[nr] = DIV_TO_REG(val); 347 348 switch (nr) { 349 case 0: /* fan 1 */ 350 reg = asb100_read_value(client, ASB100_REG_VID_FANDIV); 351 reg = (reg & 0xcf) | (data->fan_div[0] << 4); 352 asb100_write_value(client, ASB100_REG_VID_FANDIV, reg); 353 break; 354 355 case 1: /* fan 2 */ 356 reg = asb100_read_value(client, ASB100_REG_VID_FANDIV); 357 reg = (reg & 0x3f) | (data->fan_div[1] << 6); 358 asb100_write_value(client, ASB100_REG_VID_FANDIV, reg); 359 break; 360 361 case 2: /* fan 3 */ 362 reg = asb100_read_value(client, ASB100_REG_PIN); 363 reg = (reg & 0x3f) | (data->fan_div[2] << 6); 364 asb100_write_value(client, ASB100_REG_PIN, reg); 365 break; 366 } 367 368 data->fan_min[nr] = 369 FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr])); 370 asb100_write_value(client, ASB100_REG_FAN_MIN(nr), data->fan_min[nr]); 371 372 mutex_unlock(&data->update_lock); 373 374 return count; 375 } 376 377 #define sysfs_fan(offset) \ 378 static SENSOR_DEVICE_ATTR(fan##offset##_input, S_IRUGO, \ 379 show_fan, NULL, offset - 1); \ 380 static SENSOR_DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \ 381 show_fan_min, set_fan_min, offset - 1); \ 382 static SENSOR_DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR, \ 383 show_fan_div, set_fan_div, offset - 1) 384 385 sysfs_fan(1); 386 sysfs_fan(2); 387 sysfs_fan(3); 388 389 /* 4 Temp. Sensors */ 390 static int sprintf_temp_from_reg(u16 reg, char *buf, int nr) 391 { 392 int ret = 0; 393 394 switch (nr) { 395 case 1: case 2: 396 ret = sprintf(buf, "%d\n", LM75_TEMP_FROM_REG(reg)); 397 break; 398 case 0: case 3: default: 399 ret = sprintf(buf, "%d\n", TEMP_FROM_REG(reg)); 400 break; 401 } 402 return ret; 403 } 404 405 #define show_temp_reg(reg) \ 406 static ssize_t show_##reg(struct device *dev, struct device_attribute *attr, \ 407 char *buf) \ 408 { \ 409 int nr = to_sensor_dev_attr(attr)->index; \ 410 struct asb100_data *data = asb100_update_device(dev); \ 411 return sprintf_temp_from_reg(data->reg[nr], buf, nr); \ 412 } 413 414 show_temp_reg(temp); 415 show_temp_reg(temp_max); 416 show_temp_reg(temp_hyst); 417 418 #define set_temp_reg(REG, reg) \ 419 static ssize_t set_##reg(struct device *dev, struct device_attribute *attr, \ 420 const char *buf, size_t count) \ 421 { \ 422 int nr = to_sensor_dev_attr(attr)->index; \ 423 struct i2c_client *client = to_i2c_client(dev); \ 424 struct asb100_data *data = i2c_get_clientdata(client); \ 425 long val = simple_strtol(buf, NULL, 10); \ 426 \ 427 mutex_lock(&data->update_lock); \ 428 switch (nr) { \ 429 case 1: case 2: \ 430 data->reg[nr] = LM75_TEMP_TO_REG(val); \ 431 break; \ 432 case 0: case 3: default: \ 433 data->reg[nr] = TEMP_TO_REG(val); \ 434 break; \ 435 } \ 436 asb100_write_value(client, ASB100_REG_TEMP_##REG(nr+1), \ 437 data->reg[nr]); \ 438 mutex_unlock(&data->update_lock); \ 439 return count; \ 440 } 441 442 set_temp_reg(MAX, temp_max); 443 set_temp_reg(HYST, temp_hyst); 444 445 #define sysfs_temp(num) \ 446 static SENSOR_DEVICE_ATTR(temp##num##_input, S_IRUGO, \ 447 show_temp, NULL, num - 1); \ 448 static SENSOR_DEVICE_ATTR(temp##num##_max, S_IRUGO | S_IWUSR, \ 449 show_temp_max, set_temp_max, num - 1); \ 450 static SENSOR_DEVICE_ATTR(temp##num##_max_hyst, S_IRUGO | S_IWUSR, \ 451 show_temp_hyst, set_temp_hyst, num - 1) 452 453 sysfs_temp(1); 454 sysfs_temp(2); 455 sysfs_temp(3); 456 sysfs_temp(4); 457 458 /* VID */ 459 static ssize_t show_vid(struct device *dev, struct device_attribute *attr, 460 char *buf) 461 { 462 struct asb100_data *data = asb100_update_device(dev); 463 return sprintf(buf, "%d\n", vid_from_reg(data->vid, data->vrm)); 464 } 465 466 static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid, NULL); 467 468 /* VRM */ 469 static ssize_t show_vrm(struct device *dev, struct device_attribute *attr, 470 char *buf) 471 { 472 struct asb100_data *data = dev_get_drvdata(dev); 473 return sprintf(buf, "%d\n", data->vrm); 474 } 475 476 static ssize_t set_vrm(struct device *dev, struct device_attribute *attr, 477 const char *buf, size_t count) 478 { 479 struct asb100_data *data = dev_get_drvdata(dev); 480 data->vrm = simple_strtoul(buf, NULL, 10); 481 return count; 482 } 483 484 /* Alarms */ 485 static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm, set_vrm); 486 487 static ssize_t show_alarms(struct device *dev, struct device_attribute *attr, 488 char *buf) 489 { 490 struct asb100_data *data = asb100_update_device(dev); 491 return sprintf(buf, "%u\n", data->alarms); 492 } 493 494 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL); 495 496 static ssize_t show_alarm(struct device *dev, struct device_attribute *attr, 497 char *buf) 498 { 499 int bitnr = to_sensor_dev_attr(attr)->index; 500 struct asb100_data *data = asb100_update_device(dev); 501 return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1); 502 } 503 static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0); 504 static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 1); 505 static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 2); 506 static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 3); 507 static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 8); 508 static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 6); 509 static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 7); 510 static SENSOR_DEVICE_ATTR(fan3_alarm, S_IRUGO, show_alarm, NULL, 11); 511 static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 4); 512 static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 5); 513 static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL, 13); 514 515 /* 1 PWM */ 516 static ssize_t show_pwm1(struct device *dev, struct device_attribute *attr, 517 char *buf) 518 { 519 struct asb100_data *data = asb100_update_device(dev); 520 return sprintf(buf, "%d\n", ASB100_PWM_FROM_REG(data->pwm & 0x0f)); 521 } 522 523 static ssize_t set_pwm1(struct device *dev, struct device_attribute *attr, 524 const char *buf, size_t count) 525 { 526 struct i2c_client *client = to_i2c_client(dev); 527 struct asb100_data *data = i2c_get_clientdata(client); 528 unsigned long val = simple_strtoul(buf, NULL, 10); 529 530 mutex_lock(&data->update_lock); 531 data->pwm &= 0x80; /* keep the enable bit */ 532 data->pwm |= (0x0f & ASB100_PWM_TO_REG(val)); 533 asb100_write_value(client, ASB100_REG_PWM1, data->pwm); 534 mutex_unlock(&data->update_lock); 535 return count; 536 } 537 538 static ssize_t show_pwm_enable1(struct device *dev, 539 struct device_attribute *attr, char *buf) 540 { 541 struct asb100_data *data = asb100_update_device(dev); 542 return sprintf(buf, "%d\n", (data->pwm & 0x80) ? 1 : 0); 543 } 544 545 static ssize_t set_pwm_enable1(struct device *dev, 546 struct device_attribute *attr, const char *buf, size_t count) 547 { 548 struct i2c_client *client = to_i2c_client(dev); 549 struct asb100_data *data = i2c_get_clientdata(client); 550 unsigned long val = simple_strtoul(buf, NULL, 10); 551 552 mutex_lock(&data->update_lock); 553 data->pwm &= 0x0f; /* keep the duty cycle bits */ 554 data->pwm |= (val ? 0x80 : 0x00); 555 asb100_write_value(client, ASB100_REG_PWM1, data->pwm); 556 mutex_unlock(&data->update_lock); 557 return count; 558 } 559 560 static DEVICE_ATTR(pwm1, S_IRUGO | S_IWUSR, show_pwm1, set_pwm1); 561 static DEVICE_ATTR(pwm1_enable, S_IRUGO | S_IWUSR, 562 show_pwm_enable1, set_pwm_enable1); 563 564 static struct attribute *asb100_attributes[] = { 565 &sensor_dev_attr_in0_input.dev_attr.attr, 566 &sensor_dev_attr_in0_min.dev_attr.attr, 567 &sensor_dev_attr_in0_max.dev_attr.attr, 568 &sensor_dev_attr_in1_input.dev_attr.attr, 569 &sensor_dev_attr_in1_min.dev_attr.attr, 570 &sensor_dev_attr_in1_max.dev_attr.attr, 571 &sensor_dev_attr_in2_input.dev_attr.attr, 572 &sensor_dev_attr_in2_min.dev_attr.attr, 573 &sensor_dev_attr_in2_max.dev_attr.attr, 574 &sensor_dev_attr_in3_input.dev_attr.attr, 575 &sensor_dev_attr_in3_min.dev_attr.attr, 576 &sensor_dev_attr_in3_max.dev_attr.attr, 577 &sensor_dev_attr_in4_input.dev_attr.attr, 578 &sensor_dev_attr_in4_min.dev_attr.attr, 579 &sensor_dev_attr_in4_max.dev_attr.attr, 580 &sensor_dev_attr_in5_input.dev_attr.attr, 581 &sensor_dev_attr_in5_min.dev_attr.attr, 582 &sensor_dev_attr_in5_max.dev_attr.attr, 583 &sensor_dev_attr_in6_input.dev_attr.attr, 584 &sensor_dev_attr_in6_min.dev_attr.attr, 585 &sensor_dev_attr_in6_max.dev_attr.attr, 586 587 &sensor_dev_attr_fan1_input.dev_attr.attr, 588 &sensor_dev_attr_fan1_min.dev_attr.attr, 589 &sensor_dev_attr_fan1_div.dev_attr.attr, 590 &sensor_dev_attr_fan2_input.dev_attr.attr, 591 &sensor_dev_attr_fan2_min.dev_attr.attr, 592 &sensor_dev_attr_fan2_div.dev_attr.attr, 593 &sensor_dev_attr_fan3_input.dev_attr.attr, 594 &sensor_dev_attr_fan3_min.dev_attr.attr, 595 &sensor_dev_attr_fan3_div.dev_attr.attr, 596 597 &sensor_dev_attr_temp1_input.dev_attr.attr, 598 &sensor_dev_attr_temp1_max.dev_attr.attr, 599 &sensor_dev_attr_temp1_max_hyst.dev_attr.attr, 600 &sensor_dev_attr_temp2_input.dev_attr.attr, 601 &sensor_dev_attr_temp2_max.dev_attr.attr, 602 &sensor_dev_attr_temp2_max_hyst.dev_attr.attr, 603 &sensor_dev_attr_temp3_input.dev_attr.attr, 604 &sensor_dev_attr_temp3_max.dev_attr.attr, 605 &sensor_dev_attr_temp3_max_hyst.dev_attr.attr, 606 &sensor_dev_attr_temp4_input.dev_attr.attr, 607 &sensor_dev_attr_temp4_max.dev_attr.attr, 608 &sensor_dev_attr_temp4_max_hyst.dev_attr.attr, 609 610 &sensor_dev_attr_in0_alarm.dev_attr.attr, 611 &sensor_dev_attr_in1_alarm.dev_attr.attr, 612 &sensor_dev_attr_in2_alarm.dev_attr.attr, 613 &sensor_dev_attr_in3_alarm.dev_attr.attr, 614 &sensor_dev_attr_in4_alarm.dev_attr.attr, 615 &sensor_dev_attr_fan1_alarm.dev_attr.attr, 616 &sensor_dev_attr_fan2_alarm.dev_attr.attr, 617 &sensor_dev_attr_fan3_alarm.dev_attr.attr, 618 &sensor_dev_attr_temp1_alarm.dev_attr.attr, 619 &sensor_dev_attr_temp2_alarm.dev_attr.attr, 620 &sensor_dev_attr_temp3_alarm.dev_attr.attr, 621 622 &dev_attr_cpu0_vid.attr, 623 &dev_attr_vrm.attr, 624 &dev_attr_alarms.attr, 625 &dev_attr_pwm1.attr, 626 &dev_attr_pwm1_enable.attr, 627 628 NULL 629 }; 630 631 static const struct attribute_group asb100_group = { 632 .attrs = asb100_attributes, 633 }; 634 635 static int asb100_detect_subclients(struct i2c_client *client) 636 { 637 int i, id, err; 638 int address = client->addr; 639 unsigned short sc_addr[2]; 640 struct asb100_data *data = i2c_get_clientdata(client); 641 struct i2c_adapter *adapter = client->adapter; 642 643 id = i2c_adapter_id(adapter); 644 645 if (force_subclients[0] == id && force_subclients[1] == address) { 646 for (i = 2; i <= 3; i++) { 647 if (force_subclients[i] < 0x48 || 648 force_subclients[i] > 0x4f) { 649 dev_err(&client->dev, "invalid subclient " 650 "address %d; must be 0x48-0x4f\n", 651 force_subclients[i]); 652 err = -ENODEV; 653 goto ERROR_SC_2; 654 } 655 } 656 asb100_write_value(client, ASB100_REG_I2C_SUBADDR, 657 (force_subclients[2] & 0x07) | 658 ((force_subclients[3] & 0x07) << 4)); 659 sc_addr[0] = force_subclients[2]; 660 sc_addr[1] = force_subclients[3]; 661 } else { 662 int val = asb100_read_value(client, ASB100_REG_I2C_SUBADDR); 663 sc_addr[0] = 0x48 + (val & 0x07); 664 sc_addr[1] = 0x48 + ((val >> 4) & 0x07); 665 } 666 667 if (sc_addr[0] == sc_addr[1]) { 668 dev_err(&client->dev, "duplicate addresses 0x%x " 669 "for subclients\n", sc_addr[0]); 670 err = -ENODEV; 671 goto ERROR_SC_2; 672 } 673 674 data->lm75[0] = i2c_new_dummy(adapter, sc_addr[0]); 675 if (!data->lm75[0]) { 676 dev_err(&client->dev, "subclient %d registration " 677 "at address 0x%x failed.\n", 1, sc_addr[0]); 678 err = -ENOMEM; 679 goto ERROR_SC_2; 680 } 681 682 data->lm75[1] = i2c_new_dummy(adapter, sc_addr[1]); 683 if (!data->lm75[1]) { 684 dev_err(&client->dev, "subclient %d registration " 685 "at address 0x%x failed.\n", 2, sc_addr[1]); 686 err = -ENOMEM; 687 goto ERROR_SC_3; 688 } 689 690 return 0; 691 692 /* Undo inits in case of errors */ 693 ERROR_SC_3: 694 i2c_unregister_device(data->lm75[0]); 695 ERROR_SC_2: 696 return err; 697 } 698 699 /* Return 0 if detection is successful, -ENODEV otherwise */ 700 static int asb100_detect(struct i2c_client *client, 701 struct i2c_board_info *info) 702 { 703 struct i2c_adapter *adapter = client->adapter; 704 int val1, val2; 705 706 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) { 707 pr_debug("asb100.o: detect failed, " 708 "smbus byte data not supported!\n"); 709 return -ENODEV; 710 } 711 712 val1 = i2c_smbus_read_byte_data(client, ASB100_REG_BANK); 713 val2 = i2c_smbus_read_byte_data(client, ASB100_REG_CHIPMAN); 714 715 /* If we're in bank 0 */ 716 if ((!(val1 & 0x07)) && 717 /* Check for ASB100 ID (low byte) */ 718 (((!(val1 & 0x80)) && (val2 != 0x94)) || 719 /* Check for ASB100 ID (high byte ) */ 720 ((val1 & 0x80) && (val2 != 0x06)))) { 721 pr_debug("asb100: detect failed, bad chip id 0x%02x!\n", val2); 722 return -ENODEV; 723 } 724 725 /* Put it now into bank 0 and Vendor ID High Byte */ 726 i2c_smbus_write_byte_data(client, ASB100_REG_BANK, 727 (i2c_smbus_read_byte_data(client, ASB100_REG_BANK) & 0x78) 728 | 0x80); 729 730 /* Determine the chip type. */ 731 val1 = i2c_smbus_read_byte_data(client, ASB100_REG_WCHIPID); 732 val2 = i2c_smbus_read_byte_data(client, ASB100_REG_CHIPMAN); 733 734 if (val1 != 0x31 || val2 != 0x06) 735 return -ENODEV; 736 737 strlcpy(info->type, "asb100", I2C_NAME_SIZE); 738 739 return 0; 740 } 741 742 static int asb100_probe(struct i2c_client *client, 743 const struct i2c_device_id *id) 744 { 745 int err; 746 struct asb100_data *data; 747 748 data = kzalloc(sizeof(struct asb100_data), GFP_KERNEL); 749 if (!data) { 750 pr_debug("asb100.o: probe failed, kzalloc failed!\n"); 751 err = -ENOMEM; 752 goto ERROR0; 753 } 754 755 i2c_set_clientdata(client, data); 756 mutex_init(&data->lock); 757 mutex_init(&data->update_lock); 758 759 /* Attach secondary lm75 clients */ 760 err = asb100_detect_subclients(client); 761 if (err) 762 goto ERROR1; 763 764 /* Initialize the chip */ 765 asb100_init_client(client); 766 767 /* A few vars need to be filled upon startup */ 768 data->fan_min[0] = asb100_read_value(client, ASB100_REG_FAN_MIN(0)); 769 data->fan_min[1] = asb100_read_value(client, ASB100_REG_FAN_MIN(1)); 770 data->fan_min[2] = asb100_read_value(client, ASB100_REG_FAN_MIN(2)); 771 772 /* Register sysfs hooks */ 773 if ((err = sysfs_create_group(&client->dev.kobj, &asb100_group))) 774 goto ERROR3; 775 776 data->hwmon_dev = hwmon_device_register(&client->dev); 777 if (IS_ERR(data->hwmon_dev)) { 778 err = PTR_ERR(data->hwmon_dev); 779 goto ERROR4; 780 } 781 782 return 0; 783 784 ERROR4: 785 sysfs_remove_group(&client->dev.kobj, &asb100_group); 786 ERROR3: 787 i2c_unregister_device(data->lm75[1]); 788 i2c_unregister_device(data->lm75[0]); 789 ERROR1: 790 kfree(data); 791 ERROR0: 792 return err; 793 } 794 795 static int asb100_remove(struct i2c_client *client) 796 { 797 struct asb100_data *data = i2c_get_clientdata(client); 798 799 hwmon_device_unregister(data->hwmon_dev); 800 sysfs_remove_group(&client->dev.kobj, &asb100_group); 801 802 i2c_unregister_device(data->lm75[1]); 803 i2c_unregister_device(data->lm75[0]); 804 805 kfree(data); 806 807 return 0; 808 } 809 810 /* The SMBus locks itself, usually, but nothing may access the chip between 811 bank switches. */ 812 static int asb100_read_value(struct i2c_client *client, u16 reg) 813 { 814 struct asb100_data *data = i2c_get_clientdata(client); 815 struct i2c_client *cl; 816 int res, bank; 817 818 mutex_lock(&data->lock); 819 820 bank = (reg >> 8) & 0x0f; 821 if (bank > 2) 822 /* switch banks */ 823 i2c_smbus_write_byte_data(client, ASB100_REG_BANK, bank); 824 825 if (bank == 0 || bank > 2) { 826 res = i2c_smbus_read_byte_data(client, reg & 0xff); 827 } else { 828 /* switch to subclient */ 829 cl = data->lm75[bank - 1]; 830 831 /* convert from ISA to LM75 I2C addresses */ 832 switch (reg & 0xff) { 833 case 0x50: /* TEMP */ 834 res = swab16(i2c_smbus_read_word_data(cl, 0)); 835 break; 836 case 0x52: /* CONFIG */ 837 res = i2c_smbus_read_byte_data(cl, 1); 838 break; 839 case 0x53: /* HYST */ 840 res = swab16(i2c_smbus_read_word_data(cl, 2)); 841 break; 842 case 0x55: /* MAX */ 843 default: 844 res = swab16(i2c_smbus_read_word_data(cl, 3)); 845 break; 846 } 847 } 848 849 if (bank > 2) 850 i2c_smbus_write_byte_data(client, ASB100_REG_BANK, 0); 851 852 mutex_unlock(&data->lock); 853 854 return res; 855 } 856 857 static void asb100_write_value(struct i2c_client *client, u16 reg, u16 value) 858 { 859 struct asb100_data *data = i2c_get_clientdata(client); 860 struct i2c_client *cl; 861 int 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 i2c_smbus_write_byte_data(client, reg & 0xff, value & 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 0x52: /* CONFIG */ 879 i2c_smbus_write_byte_data(cl, 1, value & 0xff); 880 break; 881 case 0x53: /* HYST */ 882 i2c_smbus_write_word_data(cl, 2, swab16(value)); 883 break; 884 case 0x55: /* MAX */ 885 i2c_smbus_write_word_data(cl, 3, swab16(value)); 886 break; 887 } 888 } 889 890 if (bank > 2) 891 i2c_smbus_write_byte_data(client, ASB100_REG_BANK, 0); 892 893 mutex_unlock(&data->lock); 894 } 895 896 static void asb100_init_client(struct i2c_client *client) 897 { 898 struct asb100_data *data = i2c_get_clientdata(client); 899 900 data->vrm = vid_which_vrm(); 901 902 /* Start monitoring */ 903 asb100_write_value(client, ASB100_REG_CONFIG, 904 (asb100_read_value(client, ASB100_REG_CONFIG) & 0xf7) | 0x01); 905 } 906 907 static struct asb100_data *asb100_update_device(struct device *dev) 908 { 909 struct i2c_client *client = to_i2c_client(dev); 910 struct asb100_data *data = i2c_get_clientdata(client); 911 int i; 912 913 mutex_lock(&data->update_lock); 914 915 if (time_after(jiffies, data->last_updated + HZ + HZ / 2) 916 || !data->valid) { 917 918 dev_dbg(&client->dev, "starting device update...\n"); 919 920 /* 7 voltage inputs */ 921 for (i = 0; i < 7; i++) { 922 data->in[i] = asb100_read_value(client, 923 ASB100_REG_IN(i)); 924 data->in_min[i] = asb100_read_value(client, 925 ASB100_REG_IN_MIN(i)); 926 data->in_max[i] = asb100_read_value(client, 927 ASB100_REG_IN_MAX(i)); 928 } 929 930 /* 3 fan inputs */ 931 for (i = 0; i < 3; i++) { 932 data->fan[i] = asb100_read_value(client, 933 ASB100_REG_FAN(i)); 934 data->fan_min[i] = asb100_read_value(client, 935 ASB100_REG_FAN_MIN(i)); 936 } 937 938 /* 4 temperature inputs */ 939 for (i = 1; i <= 4; i++) { 940 data->temp[i-1] = asb100_read_value(client, 941 ASB100_REG_TEMP(i)); 942 data->temp_max[i-1] = asb100_read_value(client, 943 ASB100_REG_TEMP_MAX(i)); 944 data->temp_hyst[i-1] = asb100_read_value(client, 945 ASB100_REG_TEMP_HYST(i)); 946 } 947 948 /* VID and fan divisors */ 949 i = asb100_read_value(client, ASB100_REG_VID_FANDIV); 950 data->vid = i & 0x0f; 951 data->vid |= (asb100_read_value(client, 952 ASB100_REG_CHIPID) & 0x01) << 4; 953 data->fan_div[0] = (i >> 4) & 0x03; 954 data->fan_div[1] = (i >> 6) & 0x03; 955 data->fan_div[2] = (asb100_read_value(client, 956 ASB100_REG_PIN) >> 6) & 0x03; 957 958 /* PWM */ 959 data->pwm = asb100_read_value(client, ASB100_REG_PWM1); 960 961 /* alarms */ 962 data->alarms = asb100_read_value(client, ASB100_REG_ALARM1) + 963 (asb100_read_value(client, ASB100_REG_ALARM2) << 8); 964 965 data->last_updated = jiffies; 966 data->valid = 1; 967 968 dev_dbg(&client->dev, "... device update complete\n"); 969 } 970 971 mutex_unlock(&data->update_lock); 972 973 return data; 974 } 975 976 static int __init asb100_init(void) 977 { 978 return i2c_add_driver(&asb100_driver); 979 } 980 981 static void __exit asb100_exit(void) 982 { 983 i2c_del_driver(&asb100_driver); 984 } 985 986 MODULE_AUTHOR("Mark M. Hoffman <mhoffman@lightlink.com>"); 987 MODULE_DESCRIPTION("ASB100 Bach driver"); 988 MODULE_LICENSE("GPL"); 989 990 module_init(asb100_init); 991 module_exit(asb100_exit); 992