1 /* 2 * gl520sm.c - Part of lm_sensors, Linux kernel modules for hardware 3 * monitoring 4 * Copyright (c) 1998, 1999 Frodo Looijaard <frodol@dds.nl>, 5 * Kyösti Mälkki <kmalkki@cc.hut.fi> 6 * Copyright (c) 2005 Maarten Deprez <maartendeprez@users.sourceforge.net> 7 * 8 * This program is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License as published by 10 * the Free Software Foundation; either version 2 of the License, or 11 * (at your option) any later version. 12 * 13 * This program is distributed in the hope that it will be useful, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 * GNU General Public License for more details. 17 * 18 * You should have received a copy of the GNU General Public License 19 * along with this program; if not, write to the Free Software 20 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 21 * 22 */ 23 24 #include <linux/module.h> 25 #include <linux/init.h> 26 #include <linux/slab.h> 27 #include <linux/jiffies.h> 28 #include <linux/i2c.h> 29 #include <linux/hwmon.h> 30 #include <linux/hwmon-sysfs.h> 31 #include <linux/hwmon-vid.h> 32 #include <linux/err.h> 33 #include <linux/mutex.h> 34 #include <linux/sysfs.h> 35 36 /* Type of the extra sensor */ 37 static unsigned short extra_sensor_type; 38 module_param(extra_sensor_type, ushort, 0); 39 MODULE_PARM_DESC(extra_sensor_type, "Type of extra sensor (0=autodetect, 1=temperature, 2=voltage)"); 40 41 /* Addresses to scan */ 42 static const unsigned short normal_i2c[] = { 0x2c, 0x2d, I2C_CLIENT_END }; 43 44 /* 45 * Many GL520 constants specified below 46 * One of the inputs can be configured as either temp or voltage. 47 * That's why _TEMP2 and _IN4 access the same register 48 */ 49 50 /* The GL520 registers */ 51 #define GL520_REG_CHIP_ID 0x00 52 #define GL520_REG_REVISION 0x01 53 #define GL520_REG_CONF 0x03 54 #define GL520_REG_MASK 0x11 55 56 #define GL520_REG_VID_INPUT 0x02 57 58 static const u8 GL520_REG_IN_INPUT[] = { 0x15, 0x14, 0x13, 0x0d, 0x0e }; 59 static const u8 GL520_REG_IN_LIMIT[] = { 0x0c, 0x09, 0x0a, 0x0b }; 60 static const u8 GL520_REG_IN_MIN[] = { 0x0c, 0x09, 0x0a, 0x0b, 0x18 }; 61 static const u8 GL520_REG_IN_MAX[] = { 0x0c, 0x09, 0x0a, 0x0b, 0x17 }; 62 63 static const u8 GL520_REG_TEMP_INPUT[] = { 0x04, 0x0e }; 64 static const u8 GL520_REG_TEMP_MAX[] = { 0x05, 0x17 }; 65 static const u8 GL520_REG_TEMP_MAX_HYST[] = { 0x06, 0x18 }; 66 67 #define GL520_REG_FAN_INPUT 0x07 68 #define GL520_REG_FAN_MIN 0x08 69 #define GL520_REG_FAN_DIV 0x0f 70 #define GL520_REG_FAN_OFF GL520_REG_FAN_DIV 71 72 #define GL520_REG_ALARMS 0x12 73 #define GL520_REG_BEEP_MASK 0x10 74 #define GL520_REG_BEEP_ENABLE GL520_REG_CONF 75 76 /* 77 * Function declarations 78 */ 79 80 static int gl520_probe(struct i2c_client *client, 81 const struct i2c_device_id *id); 82 static int gl520_detect(struct i2c_client *client, struct i2c_board_info *info); 83 static void gl520_init_client(struct i2c_client *client); 84 static int gl520_remove(struct i2c_client *client); 85 static int gl520_read_value(struct i2c_client *client, u8 reg); 86 static int gl520_write_value(struct i2c_client *client, u8 reg, u16 value); 87 static struct gl520_data *gl520_update_device(struct device *dev); 88 89 /* Driver data */ 90 static const struct i2c_device_id gl520_id[] = { 91 { "gl520sm", 0 }, 92 { } 93 }; 94 MODULE_DEVICE_TABLE(i2c, gl520_id); 95 96 static struct i2c_driver gl520_driver = { 97 .class = I2C_CLASS_HWMON, 98 .driver = { 99 .name = "gl520sm", 100 }, 101 .probe = gl520_probe, 102 .remove = gl520_remove, 103 .id_table = gl520_id, 104 .detect = gl520_detect, 105 .address_list = normal_i2c, 106 }; 107 108 /* Client data */ 109 struct gl520_data { 110 struct device *hwmon_dev; 111 struct mutex update_lock; 112 char valid; /* zero until the following fields are valid */ 113 unsigned long last_updated; /* in jiffies */ 114 115 u8 vid; 116 u8 vrm; 117 u8 in_input[5]; /* [0] = VVD */ 118 u8 in_min[5]; /* [0] = VDD */ 119 u8 in_max[5]; /* [0] = VDD */ 120 u8 fan_input[2]; 121 u8 fan_min[2]; 122 u8 fan_div[2]; 123 u8 fan_off; 124 u8 temp_input[2]; 125 u8 temp_max[2]; 126 u8 temp_max_hyst[2]; 127 u8 alarms; 128 u8 beep_enable; 129 u8 beep_mask; 130 u8 alarm_mask; 131 u8 two_temps; 132 }; 133 134 /* 135 * Sysfs stuff 136 */ 137 138 static ssize_t get_cpu_vid(struct device *dev, struct device_attribute *attr, 139 char *buf) 140 { 141 struct gl520_data *data = gl520_update_device(dev); 142 return sprintf(buf, "%u\n", vid_from_reg(data->vid, data->vrm)); 143 } 144 static DEVICE_ATTR(cpu0_vid, S_IRUGO, get_cpu_vid, NULL); 145 146 #define VDD_FROM_REG(val) (((val) * 95 + 2) / 4) 147 #define VDD_TO_REG(val) SENSORS_LIMIT((((val) * 4 + 47) / 95), 0, 255) 148 149 #define IN_FROM_REG(val) ((val) * 19) 150 #define IN_TO_REG(val) SENSORS_LIMIT((((val) + 9) / 19), 0, 255) 151 152 static ssize_t get_in_input(struct device *dev, struct device_attribute *attr, 153 char *buf) 154 { 155 int n = to_sensor_dev_attr(attr)->index; 156 struct gl520_data *data = gl520_update_device(dev); 157 u8 r = data->in_input[n]; 158 159 if (n == 0) 160 return sprintf(buf, "%d\n", VDD_FROM_REG(r)); 161 else 162 return sprintf(buf, "%d\n", IN_FROM_REG(r)); 163 } 164 165 static ssize_t get_in_min(struct device *dev, struct device_attribute *attr, 166 char *buf) 167 { 168 int n = to_sensor_dev_attr(attr)->index; 169 struct gl520_data *data = gl520_update_device(dev); 170 u8 r = data->in_min[n]; 171 172 if (n == 0) 173 return sprintf(buf, "%d\n", VDD_FROM_REG(r)); 174 else 175 return sprintf(buf, "%d\n", IN_FROM_REG(r)); 176 } 177 178 static ssize_t get_in_max(struct device *dev, struct device_attribute *attr, 179 char *buf) 180 { 181 int n = to_sensor_dev_attr(attr)->index; 182 struct gl520_data *data = gl520_update_device(dev); 183 u8 r = data->in_max[n]; 184 185 if (n == 0) 186 return sprintf(buf, "%d\n", VDD_FROM_REG(r)); 187 else 188 return sprintf(buf, "%d\n", IN_FROM_REG(r)); 189 } 190 191 static ssize_t set_in_min(struct device *dev, struct device_attribute *attr, 192 const char *buf, size_t count) 193 { 194 struct i2c_client *client = to_i2c_client(dev); 195 struct gl520_data *data = i2c_get_clientdata(client); 196 int n = to_sensor_dev_attr(attr)->index; 197 u8 r; 198 long v; 199 int err; 200 201 err = kstrtol(buf, 10, &v); 202 if (err) 203 return err; 204 205 mutex_lock(&data->update_lock); 206 207 if (n == 0) 208 r = VDD_TO_REG(v); 209 else 210 r = IN_TO_REG(v); 211 212 data->in_min[n] = r; 213 214 if (n < 4) 215 gl520_write_value(client, GL520_REG_IN_MIN[n], 216 (gl520_read_value(client, GL520_REG_IN_MIN[n]) 217 & ~0xff) | r); 218 else 219 gl520_write_value(client, GL520_REG_IN_MIN[n], r); 220 221 mutex_unlock(&data->update_lock); 222 return count; 223 } 224 225 static ssize_t set_in_max(struct device *dev, struct device_attribute *attr, 226 const char *buf, size_t count) 227 { 228 struct i2c_client *client = to_i2c_client(dev); 229 struct gl520_data *data = i2c_get_clientdata(client); 230 int n = to_sensor_dev_attr(attr)->index; 231 u8 r; 232 long v; 233 int err; 234 235 err = kstrtol(buf, 10, &v); 236 if (err) 237 return err; 238 239 if (n == 0) 240 r = VDD_TO_REG(v); 241 else 242 r = IN_TO_REG(v); 243 244 mutex_lock(&data->update_lock); 245 246 data->in_max[n] = r; 247 248 if (n < 4) 249 gl520_write_value(client, GL520_REG_IN_MAX[n], 250 (gl520_read_value(client, GL520_REG_IN_MAX[n]) 251 & ~0xff00) | (r << 8)); 252 else 253 gl520_write_value(client, GL520_REG_IN_MAX[n], r); 254 255 mutex_unlock(&data->update_lock); 256 return count; 257 } 258 259 static SENSOR_DEVICE_ATTR(in0_input, S_IRUGO, get_in_input, NULL, 0); 260 static SENSOR_DEVICE_ATTR(in1_input, S_IRUGO, get_in_input, NULL, 1); 261 static SENSOR_DEVICE_ATTR(in2_input, S_IRUGO, get_in_input, NULL, 2); 262 static SENSOR_DEVICE_ATTR(in3_input, S_IRUGO, get_in_input, NULL, 3); 263 static SENSOR_DEVICE_ATTR(in4_input, S_IRUGO, get_in_input, NULL, 4); 264 static SENSOR_DEVICE_ATTR(in0_min, S_IRUGO | S_IWUSR, 265 get_in_min, set_in_min, 0); 266 static SENSOR_DEVICE_ATTR(in1_min, S_IRUGO | S_IWUSR, 267 get_in_min, set_in_min, 1); 268 static SENSOR_DEVICE_ATTR(in2_min, S_IRUGO | S_IWUSR, 269 get_in_min, set_in_min, 2); 270 static SENSOR_DEVICE_ATTR(in3_min, S_IRUGO | S_IWUSR, 271 get_in_min, set_in_min, 3); 272 static SENSOR_DEVICE_ATTR(in4_min, S_IRUGO | S_IWUSR, 273 get_in_min, set_in_min, 4); 274 static SENSOR_DEVICE_ATTR(in0_max, S_IRUGO | S_IWUSR, 275 get_in_max, set_in_max, 0); 276 static SENSOR_DEVICE_ATTR(in1_max, S_IRUGO | S_IWUSR, 277 get_in_max, set_in_max, 1); 278 static SENSOR_DEVICE_ATTR(in2_max, S_IRUGO | S_IWUSR, 279 get_in_max, set_in_max, 2); 280 static SENSOR_DEVICE_ATTR(in3_max, S_IRUGO | S_IWUSR, 281 get_in_max, set_in_max, 3); 282 static SENSOR_DEVICE_ATTR(in4_max, S_IRUGO | S_IWUSR, 283 get_in_max, set_in_max, 4); 284 285 #define DIV_FROM_REG(val) (1 << (val)) 286 #define FAN_FROM_REG(val, div) ((val) == 0 ? 0 : (480000 / ((val) << (div)))) 287 #define FAN_TO_REG(val, div) ((val) <= 0 ? 0 : \ 288 SENSORS_LIMIT((480000 + ((val) << ((div)-1))) / ((val) << (div)), 1, \ 289 255)) 290 291 static ssize_t get_fan_input(struct device *dev, struct device_attribute *attr, 292 char *buf) 293 { 294 int n = to_sensor_dev_attr(attr)->index; 295 struct gl520_data *data = gl520_update_device(dev); 296 297 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_input[n], 298 data->fan_div[n])); 299 } 300 301 static ssize_t get_fan_min(struct device *dev, struct device_attribute *attr, 302 char *buf) 303 { 304 int n = to_sensor_dev_attr(attr)->index; 305 struct gl520_data *data = gl520_update_device(dev); 306 307 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[n], 308 data->fan_div[n])); 309 } 310 311 static ssize_t get_fan_div(struct device *dev, struct device_attribute *attr, 312 char *buf) 313 { 314 int n = to_sensor_dev_attr(attr)->index; 315 struct gl520_data *data = gl520_update_device(dev); 316 317 return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[n])); 318 } 319 320 static ssize_t get_fan_off(struct device *dev, struct device_attribute *attr, 321 char *buf) 322 { 323 struct gl520_data *data = gl520_update_device(dev); 324 return sprintf(buf, "%d\n", data->fan_off); 325 } 326 327 static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr, 328 const char *buf, size_t count) 329 { 330 struct i2c_client *client = to_i2c_client(dev); 331 struct gl520_data *data = i2c_get_clientdata(client); 332 int n = to_sensor_dev_attr(attr)->index; 333 u8 r; 334 unsigned long v; 335 int err; 336 337 err = kstrtoul(buf, 10, &v); 338 if (err) 339 return err; 340 341 mutex_lock(&data->update_lock); 342 r = FAN_TO_REG(v, data->fan_div[n]); 343 data->fan_min[n] = r; 344 345 if (n == 0) 346 gl520_write_value(client, GL520_REG_FAN_MIN, 347 (gl520_read_value(client, GL520_REG_FAN_MIN) 348 & ~0xff00) | (r << 8)); 349 else 350 gl520_write_value(client, GL520_REG_FAN_MIN, 351 (gl520_read_value(client, GL520_REG_FAN_MIN) 352 & ~0xff) | r); 353 354 data->beep_mask = gl520_read_value(client, GL520_REG_BEEP_MASK); 355 if (data->fan_min[n] == 0) 356 data->alarm_mask &= (n == 0) ? ~0x20 : ~0x40; 357 else 358 data->alarm_mask |= (n == 0) ? 0x20 : 0x40; 359 data->beep_mask &= data->alarm_mask; 360 gl520_write_value(client, GL520_REG_BEEP_MASK, data->beep_mask); 361 362 mutex_unlock(&data->update_lock); 363 return count; 364 } 365 366 static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr, 367 const char *buf, size_t count) 368 { 369 struct i2c_client *client = to_i2c_client(dev); 370 struct gl520_data *data = i2c_get_clientdata(client); 371 int n = to_sensor_dev_attr(attr)->index; 372 u8 r; 373 unsigned long v; 374 int err; 375 376 err = kstrtoul(buf, 10, &v); 377 if (err) 378 return err; 379 380 switch (v) { 381 case 1: 382 r = 0; 383 break; 384 case 2: 385 r = 1; 386 break; 387 case 4: 388 r = 2; 389 break; 390 case 8: 391 r = 3; 392 break; 393 default: 394 dev_err(&client->dev, 395 "fan_div value %ld not supported. Choose one of 1, 2, 4 or 8!\n", v); 396 return -EINVAL; 397 } 398 399 mutex_lock(&data->update_lock); 400 data->fan_div[n] = r; 401 402 if (n == 0) 403 gl520_write_value(client, GL520_REG_FAN_DIV, 404 (gl520_read_value(client, GL520_REG_FAN_DIV) 405 & ~0xc0) | (r << 6)); 406 else 407 gl520_write_value(client, GL520_REG_FAN_DIV, 408 (gl520_read_value(client, GL520_REG_FAN_DIV) 409 & ~0x30) | (r << 4)); 410 411 mutex_unlock(&data->update_lock); 412 return count; 413 } 414 415 static ssize_t set_fan_off(struct device *dev, struct device_attribute *attr, 416 const char *buf, size_t count) 417 { 418 struct i2c_client *client = to_i2c_client(dev); 419 struct gl520_data *data = i2c_get_clientdata(client); 420 u8 r; 421 unsigned long v; 422 int err; 423 424 err = kstrtoul(buf, 10, &v); 425 if (err) 426 return err; 427 428 r = (v ? 1 : 0); 429 430 mutex_lock(&data->update_lock); 431 data->fan_off = r; 432 gl520_write_value(client, GL520_REG_FAN_OFF, 433 (gl520_read_value(client, GL520_REG_FAN_OFF) 434 & ~0x0c) | (r << 2)); 435 mutex_unlock(&data->update_lock); 436 return count; 437 } 438 439 static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, get_fan_input, NULL, 0); 440 static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, get_fan_input, NULL, 1); 441 static SENSOR_DEVICE_ATTR(fan1_min, S_IRUGO | S_IWUSR, 442 get_fan_min, set_fan_min, 0); 443 static SENSOR_DEVICE_ATTR(fan2_min, S_IRUGO | S_IWUSR, 444 get_fan_min, set_fan_min, 1); 445 static SENSOR_DEVICE_ATTR(fan1_div, S_IRUGO | S_IWUSR, 446 get_fan_div, set_fan_div, 0); 447 static SENSOR_DEVICE_ATTR(fan2_div, S_IRUGO | S_IWUSR, 448 get_fan_div, set_fan_div, 1); 449 static DEVICE_ATTR(fan1_off, S_IRUGO | S_IWUSR, 450 get_fan_off, set_fan_off); 451 452 #define TEMP_FROM_REG(val) (((val) - 130) * 1000) 453 #define TEMP_TO_REG(val) SENSORS_LIMIT(((((val) < 0 ? \ 454 (val) - 500 : (val) + 500) / 1000) + 130), 0, 255) 455 456 static ssize_t get_temp_input(struct device *dev, struct device_attribute *attr, 457 char *buf) 458 { 459 int n = to_sensor_dev_attr(attr)->index; 460 struct gl520_data *data = gl520_update_device(dev); 461 462 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_input[n])); 463 } 464 465 static ssize_t get_temp_max(struct device *dev, struct device_attribute *attr, 466 char *buf) 467 { 468 int n = to_sensor_dev_attr(attr)->index; 469 struct gl520_data *data = gl520_update_device(dev); 470 471 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max[n])); 472 } 473 474 static ssize_t get_temp_max_hyst(struct device *dev, 475 struct device_attribute *attr, char *buf) 476 { 477 int n = to_sensor_dev_attr(attr)->index; 478 struct gl520_data *data = gl520_update_device(dev); 479 480 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max_hyst[n])); 481 } 482 483 static ssize_t set_temp_max(struct device *dev, struct device_attribute *attr, 484 const char *buf, size_t count) 485 { 486 struct i2c_client *client = to_i2c_client(dev); 487 struct gl520_data *data = i2c_get_clientdata(client); 488 int n = to_sensor_dev_attr(attr)->index; 489 long v; 490 int err; 491 492 err = kstrtol(buf, 10, &v); 493 if (err) 494 return err; 495 496 mutex_lock(&data->update_lock); 497 data->temp_max[n] = TEMP_TO_REG(v); 498 gl520_write_value(client, GL520_REG_TEMP_MAX[n], data->temp_max[n]); 499 mutex_unlock(&data->update_lock); 500 return count; 501 } 502 503 static ssize_t set_temp_max_hyst(struct device *dev, struct device_attribute 504 *attr, const char *buf, size_t count) 505 { 506 struct i2c_client *client = to_i2c_client(dev); 507 struct gl520_data *data = i2c_get_clientdata(client); 508 int n = to_sensor_dev_attr(attr)->index; 509 long v; 510 int err; 511 512 err = kstrtol(buf, 10, &v); 513 if (err) 514 return err; 515 516 mutex_lock(&data->update_lock); 517 data->temp_max_hyst[n] = TEMP_TO_REG(v); 518 gl520_write_value(client, GL520_REG_TEMP_MAX_HYST[n], 519 data->temp_max_hyst[n]); 520 mutex_unlock(&data->update_lock); 521 return count; 522 } 523 524 static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, get_temp_input, NULL, 0); 525 static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, get_temp_input, NULL, 1); 526 static SENSOR_DEVICE_ATTR(temp1_max, S_IRUGO | S_IWUSR, 527 get_temp_max, set_temp_max, 0); 528 static SENSOR_DEVICE_ATTR(temp2_max, S_IRUGO | S_IWUSR, 529 get_temp_max, set_temp_max, 1); 530 static SENSOR_DEVICE_ATTR(temp1_max_hyst, S_IRUGO | S_IWUSR, 531 get_temp_max_hyst, set_temp_max_hyst, 0); 532 static SENSOR_DEVICE_ATTR(temp2_max_hyst, S_IRUGO | S_IWUSR, 533 get_temp_max_hyst, set_temp_max_hyst, 1); 534 535 static ssize_t get_alarms(struct device *dev, struct device_attribute *attr, 536 char *buf) 537 { 538 struct gl520_data *data = gl520_update_device(dev); 539 return sprintf(buf, "%d\n", data->alarms); 540 } 541 542 static ssize_t get_beep_enable(struct device *dev, struct device_attribute 543 *attr, char *buf) 544 { 545 struct gl520_data *data = gl520_update_device(dev); 546 return sprintf(buf, "%d\n", data->beep_enable); 547 } 548 549 static ssize_t get_beep_mask(struct device *dev, struct device_attribute *attr, 550 char *buf) 551 { 552 struct gl520_data *data = gl520_update_device(dev); 553 return sprintf(buf, "%d\n", data->beep_mask); 554 } 555 556 static ssize_t set_beep_enable(struct device *dev, struct device_attribute 557 *attr, const char *buf, size_t count) 558 { 559 struct i2c_client *client = to_i2c_client(dev); 560 struct gl520_data *data = i2c_get_clientdata(client); 561 u8 r; 562 unsigned long v; 563 int err; 564 565 err = kstrtoul(buf, 10, &v); 566 if (err) 567 return err; 568 569 r = (v ? 0 : 1); 570 571 mutex_lock(&data->update_lock); 572 data->beep_enable = !r; 573 gl520_write_value(client, GL520_REG_BEEP_ENABLE, 574 (gl520_read_value(client, GL520_REG_BEEP_ENABLE) 575 & ~0x04) | (r << 2)); 576 mutex_unlock(&data->update_lock); 577 return count; 578 } 579 580 static ssize_t set_beep_mask(struct device *dev, struct device_attribute *attr, 581 const char *buf, size_t count) 582 { 583 struct i2c_client *client = to_i2c_client(dev); 584 struct gl520_data *data = i2c_get_clientdata(client); 585 unsigned long r; 586 int err; 587 588 err = kstrtoul(buf, 10, &r); 589 if (err) 590 return err; 591 592 mutex_lock(&data->update_lock); 593 r &= data->alarm_mask; 594 data->beep_mask = r; 595 gl520_write_value(client, GL520_REG_BEEP_MASK, r); 596 mutex_unlock(&data->update_lock); 597 return count; 598 } 599 600 static DEVICE_ATTR(alarms, S_IRUGO, get_alarms, NULL); 601 static DEVICE_ATTR(beep_enable, S_IRUGO | S_IWUSR, 602 get_beep_enable, set_beep_enable); 603 static DEVICE_ATTR(beep_mask, S_IRUGO | S_IWUSR, 604 get_beep_mask, set_beep_mask); 605 606 static ssize_t get_alarm(struct device *dev, struct device_attribute *attr, 607 char *buf) 608 { 609 int bit_nr = to_sensor_dev_attr(attr)->index; 610 struct gl520_data *data = gl520_update_device(dev); 611 612 return sprintf(buf, "%d\n", (data->alarms >> bit_nr) & 1); 613 } 614 615 static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, get_alarm, NULL, 0); 616 static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, get_alarm, NULL, 1); 617 static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, get_alarm, NULL, 2); 618 static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, get_alarm, NULL, 3); 619 static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, get_alarm, NULL, 4); 620 static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, get_alarm, NULL, 5); 621 static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, get_alarm, NULL, 6); 622 static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, get_alarm, NULL, 7); 623 static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, get_alarm, NULL, 7); 624 625 static ssize_t get_beep(struct device *dev, struct device_attribute *attr, 626 char *buf) 627 { 628 int bitnr = to_sensor_dev_attr(attr)->index; 629 struct gl520_data *data = gl520_update_device(dev); 630 631 return sprintf(buf, "%d\n", (data->beep_mask >> bitnr) & 1); 632 } 633 634 static ssize_t set_beep(struct device *dev, struct device_attribute *attr, 635 const char *buf, size_t count) 636 { 637 struct i2c_client *client = to_i2c_client(dev); 638 struct gl520_data *data = i2c_get_clientdata(client); 639 int bitnr = to_sensor_dev_attr(attr)->index; 640 unsigned long bit; 641 642 int err; 643 644 err = kstrtoul(buf, 10, &bit); 645 if (err) 646 return err; 647 if (bit & ~1) 648 return -EINVAL; 649 650 mutex_lock(&data->update_lock); 651 data->beep_mask = gl520_read_value(client, GL520_REG_BEEP_MASK); 652 if (bit) 653 data->beep_mask |= (1 << bitnr); 654 else 655 data->beep_mask &= ~(1 << bitnr); 656 gl520_write_value(client, GL520_REG_BEEP_MASK, data->beep_mask); 657 mutex_unlock(&data->update_lock); 658 return count; 659 } 660 661 static SENSOR_DEVICE_ATTR(in0_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 0); 662 static SENSOR_DEVICE_ATTR(in1_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 1); 663 static SENSOR_DEVICE_ATTR(in2_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 2); 664 static SENSOR_DEVICE_ATTR(in3_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 3); 665 static SENSOR_DEVICE_ATTR(temp1_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 4); 666 static SENSOR_DEVICE_ATTR(fan1_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 5); 667 static SENSOR_DEVICE_ATTR(fan2_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 6); 668 static SENSOR_DEVICE_ATTR(temp2_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 7); 669 static SENSOR_DEVICE_ATTR(in4_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 7); 670 671 static struct attribute *gl520_attributes[] = { 672 &dev_attr_cpu0_vid.attr, 673 674 &sensor_dev_attr_in0_input.dev_attr.attr, 675 &sensor_dev_attr_in0_min.dev_attr.attr, 676 &sensor_dev_attr_in0_max.dev_attr.attr, 677 &sensor_dev_attr_in0_alarm.dev_attr.attr, 678 &sensor_dev_attr_in0_beep.dev_attr.attr, 679 &sensor_dev_attr_in1_input.dev_attr.attr, 680 &sensor_dev_attr_in1_min.dev_attr.attr, 681 &sensor_dev_attr_in1_max.dev_attr.attr, 682 &sensor_dev_attr_in1_alarm.dev_attr.attr, 683 &sensor_dev_attr_in1_beep.dev_attr.attr, 684 &sensor_dev_attr_in2_input.dev_attr.attr, 685 &sensor_dev_attr_in2_min.dev_attr.attr, 686 &sensor_dev_attr_in2_max.dev_attr.attr, 687 &sensor_dev_attr_in2_alarm.dev_attr.attr, 688 &sensor_dev_attr_in2_beep.dev_attr.attr, 689 &sensor_dev_attr_in3_input.dev_attr.attr, 690 &sensor_dev_attr_in3_min.dev_attr.attr, 691 &sensor_dev_attr_in3_max.dev_attr.attr, 692 &sensor_dev_attr_in3_alarm.dev_attr.attr, 693 &sensor_dev_attr_in3_beep.dev_attr.attr, 694 695 &sensor_dev_attr_fan1_input.dev_attr.attr, 696 &sensor_dev_attr_fan1_min.dev_attr.attr, 697 &sensor_dev_attr_fan1_div.dev_attr.attr, 698 &sensor_dev_attr_fan1_alarm.dev_attr.attr, 699 &sensor_dev_attr_fan1_beep.dev_attr.attr, 700 &dev_attr_fan1_off.attr, 701 &sensor_dev_attr_fan2_input.dev_attr.attr, 702 &sensor_dev_attr_fan2_min.dev_attr.attr, 703 &sensor_dev_attr_fan2_div.dev_attr.attr, 704 &sensor_dev_attr_fan2_alarm.dev_attr.attr, 705 &sensor_dev_attr_fan2_beep.dev_attr.attr, 706 707 &sensor_dev_attr_temp1_input.dev_attr.attr, 708 &sensor_dev_attr_temp1_max.dev_attr.attr, 709 &sensor_dev_attr_temp1_max_hyst.dev_attr.attr, 710 &sensor_dev_attr_temp1_alarm.dev_attr.attr, 711 &sensor_dev_attr_temp1_beep.dev_attr.attr, 712 713 &dev_attr_alarms.attr, 714 &dev_attr_beep_enable.attr, 715 &dev_attr_beep_mask.attr, 716 NULL 717 }; 718 719 static const struct attribute_group gl520_group = { 720 .attrs = gl520_attributes, 721 }; 722 723 static struct attribute *gl520_attributes_in4[] = { 724 &sensor_dev_attr_in4_input.dev_attr.attr, 725 &sensor_dev_attr_in4_min.dev_attr.attr, 726 &sensor_dev_attr_in4_max.dev_attr.attr, 727 &sensor_dev_attr_in4_alarm.dev_attr.attr, 728 &sensor_dev_attr_in4_beep.dev_attr.attr, 729 NULL 730 }; 731 732 static struct attribute *gl520_attributes_temp2[] = { 733 &sensor_dev_attr_temp2_input.dev_attr.attr, 734 &sensor_dev_attr_temp2_max.dev_attr.attr, 735 &sensor_dev_attr_temp2_max_hyst.dev_attr.attr, 736 &sensor_dev_attr_temp2_alarm.dev_attr.attr, 737 &sensor_dev_attr_temp2_beep.dev_attr.attr, 738 NULL 739 }; 740 741 static const struct attribute_group gl520_group_in4 = { 742 .attrs = gl520_attributes_in4, 743 }; 744 745 static const struct attribute_group gl520_group_temp2 = { 746 .attrs = gl520_attributes_temp2, 747 }; 748 749 750 /* 751 * Real code 752 */ 753 754 /* Return 0 if detection is successful, -ENODEV otherwise */ 755 static int gl520_detect(struct i2c_client *client, struct i2c_board_info *info) 756 { 757 struct i2c_adapter *adapter = client->adapter; 758 759 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA | 760 I2C_FUNC_SMBUS_WORD_DATA)) 761 return -ENODEV; 762 763 /* Determine the chip type. */ 764 if ((gl520_read_value(client, GL520_REG_CHIP_ID) != 0x20) || 765 ((gl520_read_value(client, GL520_REG_REVISION) & 0x7f) != 0x00) || 766 ((gl520_read_value(client, GL520_REG_CONF) & 0x80) != 0x00)) { 767 dev_dbg(&client->dev, "Unknown chip type, skipping\n"); 768 return -ENODEV; 769 } 770 771 strlcpy(info->type, "gl520sm", I2C_NAME_SIZE); 772 773 return 0; 774 } 775 776 static int gl520_probe(struct i2c_client *client, 777 const struct i2c_device_id *id) 778 { 779 struct gl520_data *data; 780 int err; 781 782 data = devm_kzalloc(&client->dev, sizeof(struct gl520_data), 783 GFP_KERNEL); 784 if (!data) 785 return -ENOMEM; 786 787 i2c_set_clientdata(client, data); 788 mutex_init(&data->update_lock); 789 790 /* Initialize the GL520SM chip */ 791 gl520_init_client(client); 792 793 /* Register sysfs hooks */ 794 err = sysfs_create_group(&client->dev.kobj, &gl520_group); 795 if (err) 796 return err; 797 798 if (data->two_temps) 799 err = sysfs_create_group(&client->dev.kobj, &gl520_group_temp2); 800 else 801 err = sysfs_create_group(&client->dev.kobj, &gl520_group_in4); 802 803 if (err) 804 goto exit_remove_files; 805 806 data->hwmon_dev = hwmon_device_register(&client->dev); 807 if (IS_ERR(data->hwmon_dev)) { 808 err = PTR_ERR(data->hwmon_dev); 809 goto exit_remove_files; 810 } 811 812 return 0; 813 814 exit_remove_files: 815 sysfs_remove_group(&client->dev.kobj, &gl520_group); 816 sysfs_remove_group(&client->dev.kobj, &gl520_group_in4); 817 sysfs_remove_group(&client->dev.kobj, &gl520_group_temp2); 818 return err; 819 } 820 821 822 /* Called when we have found a new GL520SM. */ 823 static void gl520_init_client(struct i2c_client *client) 824 { 825 struct gl520_data *data = i2c_get_clientdata(client); 826 u8 oldconf, conf; 827 828 conf = oldconf = gl520_read_value(client, GL520_REG_CONF); 829 830 data->alarm_mask = 0xff; 831 data->vrm = vid_which_vrm(); 832 833 if (extra_sensor_type == 1) 834 conf &= ~0x10; 835 else if (extra_sensor_type == 2) 836 conf |= 0x10; 837 data->two_temps = !(conf & 0x10); 838 839 /* If IRQ# is disabled, we can safely force comparator mode */ 840 if (!(conf & 0x20)) 841 conf &= 0xf7; 842 843 /* Enable monitoring if needed */ 844 conf |= 0x40; 845 846 if (conf != oldconf) 847 gl520_write_value(client, GL520_REG_CONF, conf); 848 849 gl520_update_device(&(client->dev)); 850 851 if (data->fan_min[0] == 0) 852 data->alarm_mask &= ~0x20; 853 if (data->fan_min[1] == 0) 854 data->alarm_mask &= ~0x40; 855 856 data->beep_mask &= data->alarm_mask; 857 gl520_write_value(client, GL520_REG_BEEP_MASK, data->beep_mask); 858 } 859 860 static int gl520_remove(struct i2c_client *client) 861 { 862 struct gl520_data *data = i2c_get_clientdata(client); 863 864 hwmon_device_unregister(data->hwmon_dev); 865 sysfs_remove_group(&client->dev.kobj, &gl520_group); 866 sysfs_remove_group(&client->dev.kobj, &gl520_group_in4); 867 sysfs_remove_group(&client->dev.kobj, &gl520_group_temp2); 868 869 return 0; 870 } 871 872 873 /* 874 * Registers 0x07 to 0x0c are word-sized, others are byte-sized 875 * GL520 uses a high-byte first convention 876 */ 877 static int gl520_read_value(struct i2c_client *client, u8 reg) 878 { 879 if ((reg >= 0x07) && (reg <= 0x0c)) 880 return i2c_smbus_read_word_swapped(client, reg); 881 else 882 return i2c_smbus_read_byte_data(client, reg); 883 } 884 885 static int gl520_write_value(struct i2c_client *client, u8 reg, u16 value) 886 { 887 if ((reg >= 0x07) && (reg <= 0x0c)) 888 return i2c_smbus_write_word_swapped(client, reg, value); 889 else 890 return i2c_smbus_write_byte_data(client, reg, value); 891 } 892 893 894 static struct gl520_data *gl520_update_device(struct device *dev) 895 { 896 struct i2c_client *client = to_i2c_client(dev); 897 struct gl520_data *data = i2c_get_clientdata(client); 898 int val, i; 899 900 mutex_lock(&data->update_lock); 901 902 if (time_after(jiffies, data->last_updated + 2 * HZ) || !data->valid) { 903 904 dev_dbg(&client->dev, "Starting gl520sm update\n"); 905 906 data->alarms = gl520_read_value(client, GL520_REG_ALARMS); 907 data->beep_mask = gl520_read_value(client, GL520_REG_BEEP_MASK); 908 data->vid = gl520_read_value(client, 909 GL520_REG_VID_INPUT) & 0x1f; 910 911 for (i = 0; i < 4; i++) { 912 data->in_input[i] = gl520_read_value(client, 913 GL520_REG_IN_INPUT[i]); 914 val = gl520_read_value(client, GL520_REG_IN_LIMIT[i]); 915 data->in_min[i] = val & 0xff; 916 data->in_max[i] = (val >> 8) & 0xff; 917 } 918 919 val = gl520_read_value(client, GL520_REG_FAN_INPUT); 920 data->fan_input[0] = (val >> 8) & 0xff; 921 data->fan_input[1] = val & 0xff; 922 923 val = gl520_read_value(client, GL520_REG_FAN_MIN); 924 data->fan_min[0] = (val >> 8) & 0xff; 925 data->fan_min[1] = val & 0xff; 926 927 data->temp_input[0] = gl520_read_value(client, 928 GL520_REG_TEMP_INPUT[0]); 929 data->temp_max[0] = gl520_read_value(client, 930 GL520_REG_TEMP_MAX[0]); 931 data->temp_max_hyst[0] = gl520_read_value(client, 932 GL520_REG_TEMP_MAX_HYST[0]); 933 934 val = gl520_read_value(client, GL520_REG_FAN_DIV); 935 data->fan_div[0] = (val >> 6) & 0x03; 936 data->fan_div[1] = (val >> 4) & 0x03; 937 data->fan_off = (val >> 2) & 0x01; 938 939 data->alarms &= data->alarm_mask; 940 941 val = gl520_read_value(client, GL520_REG_CONF); 942 data->beep_enable = !((val >> 2) & 1); 943 944 /* Temp1 and Vin4 are the same input */ 945 if (data->two_temps) { 946 data->temp_input[1] = gl520_read_value(client, 947 GL520_REG_TEMP_INPUT[1]); 948 data->temp_max[1] = gl520_read_value(client, 949 GL520_REG_TEMP_MAX[1]); 950 data->temp_max_hyst[1] = gl520_read_value(client, 951 GL520_REG_TEMP_MAX_HYST[1]); 952 } else { 953 data->in_input[4] = gl520_read_value(client, 954 GL520_REG_IN_INPUT[4]); 955 data->in_min[4] = gl520_read_value(client, 956 GL520_REG_IN_MIN[4]); 957 data->in_max[4] = gl520_read_value(client, 958 GL520_REG_IN_MAX[4]); 959 } 960 961 data->last_updated = jiffies; 962 data->valid = 1; 963 } 964 965 mutex_unlock(&data->update_lock); 966 967 return data; 968 } 969 970 module_i2c_driver(gl520_driver); 971 972 MODULE_AUTHOR("Frodo Looijaard <frodol@dds.nl>, " 973 "Kyösti Mälkki <kmalkki@cc.hut.fi>, " 974 "Maarten Deprez <maartendeprez@users.sourceforge.net>"); 975 MODULE_DESCRIPTION("GL520SM driver"); 976 MODULE_LICENSE("GPL"); 977