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) clamp_val((((val) * 4 + 47) / 95), 0, 255) 148 149 #define IN_FROM_REG(val) ((val) * 19) 150 #define IN_TO_REG(val) clamp_val((((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 clamp_val((480000 + ((val) << ((div)-1))) / ((val) << (div)), 1, 255)) 289 290 static ssize_t get_fan_input(struct device *dev, struct device_attribute *attr, 291 char *buf) 292 { 293 int n = to_sensor_dev_attr(attr)->index; 294 struct gl520_data *data = gl520_update_device(dev); 295 296 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_input[n], 297 data->fan_div[n])); 298 } 299 300 static ssize_t get_fan_min(struct device *dev, struct device_attribute *attr, 301 char *buf) 302 { 303 int n = to_sensor_dev_attr(attr)->index; 304 struct gl520_data *data = gl520_update_device(dev); 305 306 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[n], 307 data->fan_div[n])); 308 } 309 310 static ssize_t get_fan_div(struct device *dev, struct device_attribute *attr, 311 char *buf) 312 { 313 int n = to_sensor_dev_attr(attr)->index; 314 struct gl520_data *data = gl520_update_device(dev); 315 316 return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[n])); 317 } 318 319 static ssize_t get_fan_off(struct device *dev, struct device_attribute *attr, 320 char *buf) 321 { 322 struct gl520_data *data = gl520_update_device(dev); 323 return sprintf(buf, "%d\n", data->fan_off); 324 } 325 326 static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr, 327 const char *buf, size_t count) 328 { 329 struct i2c_client *client = to_i2c_client(dev); 330 struct gl520_data *data = i2c_get_clientdata(client); 331 int n = to_sensor_dev_attr(attr)->index; 332 u8 r; 333 unsigned long v; 334 int err; 335 336 err = kstrtoul(buf, 10, &v); 337 if (err) 338 return err; 339 340 mutex_lock(&data->update_lock); 341 r = FAN_TO_REG(v, data->fan_div[n]); 342 data->fan_min[n] = r; 343 344 if (n == 0) 345 gl520_write_value(client, GL520_REG_FAN_MIN, 346 (gl520_read_value(client, GL520_REG_FAN_MIN) 347 & ~0xff00) | (r << 8)); 348 else 349 gl520_write_value(client, GL520_REG_FAN_MIN, 350 (gl520_read_value(client, GL520_REG_FAN_MIN) 351 & ~0xff) | r); 352 353 data->beep_mask = gl520_read_value(client, GL520_REG_BEEP_MASK); 354 if (data->fan_min[n] == 0) 355 data->alarm_mask &= (n == 0) ? ~0x20 : ~0x40; 356 else 357 data->alarm_mask |= (n == 0) ? 0x20 : 0x40; 358 data->beep_mask &= data->alarm_mask; 359 gl520_write_value(client, GL520_REG_BEEP_MASK, data->beep_mask); 360 361 mutex_unlock(&data->update_lock); 362 return count; 363 } 364 365 static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr, 366 const char *buf, size_t count) 367 { 368 struct i2c_client *client = to_i2c_client(dev); 369 struct gl520_data *data = i2c_get_clientdata(client); 370 int n = to_sensor_dev_attr(attr)->index; 371 u8 r; 372 unsigned long v; 373 int err; 374 375 err = kstrtoul(buf, 10, &v); 376 if (err) 377 return err; 378 379 switch (v) { 380 case 1: 381 r = 0; 382 break; 383 case 2: 384 r = 1; 385 break; 386 case 4: 387 r = 2; 388 break; 389 case 8: 390 r = 3; 391 break; 392 default: 393 dev_err(&client->dev, 394 "fan_div value %ld not supported. Choose one of 1, 2, 4 or 8!\n", v); 395 return -EINVAL; 396 } 397 398 mutex_lock(&data->update_lock); 399 data->fan_div[n] = r; 400 401 if (n == 0) 402 gl520_write_value(client, GL520_REG_FAN_DIV, 403 (gl520_read_value(client, GL520_REG_FAN_DIV) 404 & ~0xc0) | (r << 6)); 405 else 406 gl520_write_value(client, GL520_REG_FAN_DIV, 407 (gl520_read_value(client, GL520_REG_FAN_DIV) 408 & ~0x30) | (r << 4)); 409 410 mutex_unlock(&data->update_lock); 411 return count; 412 } 413 414 static ssize_t set_fan_off(struct device *dev, struct device_attribute *attr, 415 const char *buf, size_t count) 416 { 417 struct i2c_client *client = to_i2c_client(dev); 418 struct gl520_data *data = i2c_get_clientdata(client); 419 u8 r; 420 unsigned long v; 421 int err; 422 423 err = kstrtoul(buf, 10, &v); 424 if (err) 425 return err; 426 427 r = (v ? 1 : 0); 428 429 mutex_lock(&data->update_lock); 430 data->fan_off = r; 431 gl520_write_value(client, GL520_REG_FAN_OFF, 432 (gl520_read_value(client, GL520_REG_FAN_OFF) 433 & ~0x0c) | (r << 2)); 434 mutex_unlock(&data->update_lock); 435 return count; 436 } 437 438 static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, get_fan_input, NULL, 0); 439 static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, get_fan_input, NULL, 1); 440 static SENSOR_DEVICE_ATTR(fan1_min, S_IRUGO | S_IWUSR, 441 get_fan_min, set_fan_min, 0); 442 static SENSOR_DEVICE_ATTR(fan2_min, S_IRUGO | S_IWUSR, 443 get_fan_min, set_fan_min, 1); 444 static SENSOR_DEVICE_ATTR(fan1_div, S_IRUGO | S_IWUSR, 445 get_fan_div, set_fan_div, 0); 446 static SENSOR_DEVICE_ATTR(fan2_div, S_IRUGO | S_IWUSR, 447 get_fan_div, set_fan_div, 1); 448 static DEVICE_ATTR(fan1_off, S_IRUGO | S_IWUSR, 449 get_fan_off, set_fan_off); 450 451 #define TEMP_FROM_REG(val) (((val) - 130) * 1000) 452 #define TEMP_TO_REG(val) clamp_val(((((val) < 0 ? \ 453 (val) - 500 : (val) + 500) / 1000) + 130), 0, 255) 454 455 static ssize_t get_temp_input(struct device *dev, struct device_attribute *attr, 456 char *buf) 457 { 458 int n = to_sensor_dev_attr(attr)->index; 459 struct gl520_data *data = gl520_update_device(dev); 460 461 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_input[n])); 462 } 463 464 static ssize_t get_temp_max(struct device *dev, struct device_attribute *attr, 465 char *buf) 466 { 467 int n = to_sensor_dev_attr(attr)->index; 468 struct gl520_data *data = gl520_update_device(dev); 469 470 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max[n])); 471 } 472 473 static ssize_t get_temp_max_hyst(struct device *dev, 474 struct device_attribute *attr, char *buf) 475 { 476 int n = to_sensor_dev_attr(attr)->index; 477 struct gl520_data *data = gl520_update_device(dev); 478 479 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max_hyst[n])); 480 } 481 482 static ssize_t set_temp_max(struct device *dev, struct device_attribute *attr, 483 const char *buf, size_t count) 484 { 485 struct i2c_client *client = to_i2c_client(dev); 486 struct gl520_data *data = i2c_get_clientdata(client); 487 int n = to_sensor_dev_attr(attr)->index; 488 long v; 489 int err; 490 491 err = kstrtol(buf, 10, &v); 492 if (err) 493 return err; 494 495 mutex_lock(&data->update_lock); 496 data->temp_max[n] = TEMP_TO_REG(v); 497 gl520_write_value(client, GL520_REG_TEMP_MAX[n], data->temp_max[n]); 498 mutex_unlock(&data->update_lock); 499 return count; 500 } 501 502 static ssize_t set_temp_max_hyst(struct device *dev, struct device_attribute 503 *attr, const char *buf, size_t count) 504 { 505 struct i2c_client *client = to_i2c_client(dev); 506 struct gl520_data *data = i2c_get_clientdata(client); 507 int n = to_sensor_dev_attr(attr)->index; 508 long v; 509 int err; 510 511 err = kstrtol(buf, 10, &v); 512 if (err) 513 return err; 514 515 mutex_lock(&data->update_lock); 516 data->temp_max_hyst[n] = TEMP_TO_REG(v); 517 gl520_write_value(client, GL520_REG_TEMP_MAX_HYST[n], 518 data->temp_max_hyst[n]); 519 mutex_unlock(&data->update_lock); 520 return count; 521 } 522 523 static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, get_temp_input, NULL, 0); 524 static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, get_temp_input, NULL, 1); 525 static SENSOR_DEVICE_ATTR(temp1_max, S_IRUGO | S_IWUSR, 526 get_temp_max, set_temp_max, 0); 527 static SENSOR_DEVICE_ATTR(temp2_max, S_IRUGO | S_IWUSR, 528 get_temp_max, set_temp_max, 1); 529 static SENSOR_DEVICE_ATTR(temp1_max_hyst, S_IRUGO | S_IWUSR, 530 get_temp_max_hyst, set_temp_max_hyst, 0); 531 static SENSOR_DEVICE_ATTR(temp2_max_hyst, S_IRUGO | S_IWUSR, 532 get_temp_max_hyst, set_temp_max_hyst, 1); 533 534 static ssize_t get_alarms(struct device *dev, struct device_attribute *attr, 535 char *buf) 536 { 537 struct gl520_data *data = gl520_update_device(dev); 538 return sprintf(buf, "%d\n", data->alarms); 539 } 540 541 static ssize_t get_beep_enable(struct device *dev, struct device_attribute 542 *attr, char *buf) 543 { 544 struct gl520_data *data = gl520_update_device(dev); 545 return sprintf(buf, "%d\n", data->beep_enable); 546 } 547 548 static ssize_t get_beep_mask(struct device *dev, struct device_attribute *attr, 549 char *buf) 550 { 551 struct gl520_data *data = gl520_update_device(dev); 552 return sprintf(buf, "%d\n", data->beep_mask); 553 } 554 555 static ssize_t set_beep_enable(struct device *dev, struct device_attribute 556 *attr, const char *buf, size_t count) 557 { 558 struct i2c_client *client = to_i2c_client(dev); 559 struct gl520_data *data = i2c_get_clientdata(client); 560 u8 r; 561 unsigned long v; 562 int err; 563 564 err = kstrtoul(buf, 10, &v); 565 if (err) 566 return err; 567 568 r = (v ? 0 : 1); 569 570 mutex_lock(&data->update_lock); 571 data->beep_enable = !r; 572 gl520_write_value(client, GL520_REG_BEEP_ENABLE, 573 (gl520_read_value(client, GL520_REG_BEEP_ENABLE) 574 & ~0x04) | (r << 2)); 575 mutex_unlock(&data->update_lock); 576 return count; 577 } 578 579 static ssize_t set_beep_mask(struct device *dev, struct device_attribute *attr, 580 const char *buf, size_t count) 581 { 582 struct i2c_client *client = to_i2c_client(dev); 583 struct gl520_data *data = i2c_get_clientdata(client); 584 unsigned long r; 585 int err; 586 587 err = kstrtoul(buf, 10, &r); 588 if (err) 589 return err; 590 591 mutex_lock(&data->update_lock); 592 r &= data->alarm_mask; 593 data->beep_mask = r; 594 gl520_write_value(client, GL520_REG_BEEP_MASK, r); 595 mutex_unlock(&data->update_lock); 596 return count; 597 } 598 599 static DEVICE_ATTR(alarms, S_IRUGO, get_alarms, NULL); 600 static DEVICE_ATTR(beep_enable, S_IRUGO | S_IWUSR, 601 get_beep_enable, set_beep_enable); 602 static DEVICE_ATTR(beep_mask, S_IRUGO | S_IWUSR, 603 get_beep_mask, set_beep_mask); 604 605 static ssize_t get_alarm(struct device *dev, struct device_attribute *attr, 606 char *buf) 607 { 608 int bit_nr = to_sensor_dev_attr(attr)->index; 609 struct gl520_data *data = gl520_update_device(dev); 610 611 return sprintf(buf, "%d\n", (data->alarms >> bit_nr) & 1); 612 } 613 614 static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, get_alarm, NULL, 0); 615 static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, get_alarm, NULL, 1); 616 static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, get_alarm, NULL, 2); 617 static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, get_alarm, NULL, 3); 618 static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, get_alarm, NULL, 4); 619 static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, get_alarm, NULL, 5); 620 static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, get_alarm, NULL, 6); 621 static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, get_alarm, NULL, 7); 622 static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, get_alarm, NULL, 7); 623 624 static ssize_t get_beep(struct device *dev, struct device_attribute *attr, 625 char *buf) 626 { 627 int bitnr = to_sensor_dev_attr(attr)->index; 628 struct gl520_data *data = gl520_update_device(dev); 629 630 return sprintf(buf, "%d\n", (data->beep_mask >> bitnr) & 1); 631 } 632 633 static ssize_t set_beep(struct device *dev, struct device_attribute *attr, 634 const char *buf, size_t count) 635 { 636 struct i2c_client *client = to_i2c_client(dev); 637 struct gl520_data *data = i2c_get_clientdata(client); 638 int bitnr = to_sensor_dev_attr(attr)->index; 639 unsigned long bit; 640 641 int err; 642 643 err = kstrtoul(buf, 10, &bit); 644 if (err) 645 return err; 646 if (bit & ~1) 647 return -EINVAL; 648 649 mutex_lock(&data->update_lock); 650 data->beep_mask = gl520_read_value(client, GL520_REG_BEEP_MASK); 651 if (bit) 652 data->beep_mask |= (1 << bitnr); 653 else 654 data->beep_mask &= ~(1 << bitnr); 655 gl520_write_value(client, GL520_REG_BEEP_MASK, data->beep_mask); 656 mutex_unlock(&data->update_lock); 657 return count; 658 } 659 660 static SENSOR_DEVICE_ATTR(in0_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 0); 661 static SENSOR_DEVICE_ATTR(in1_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 1); 662 static SENSOR_DEVICE_ATTR(in2_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 2); 663 static SENSOR_DEVICE_ATTR(in3_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 3); 664 static SENSOR_DEVICE_ATTR(temp1_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 4); 665 static SENSOR_DEVICE_ATTR(fan1_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 5); 666 static SENSOR_DEVICE_ATTR(fan2_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 6); 667 static SENSOR_DEVICE_ATTR(temp2_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 7); 668 static SENSOR_DEVICE_ATTR(in4_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 7); 669 670 static struct attribute *gl520_attributes[] = { 671 &dev_attr_cpu0_vid.attr, 672 673 &sensor_dev_attr_in0_input.dev_attr.attr, 674 &sensor_dev_attr_in0_min.dev_attr.attr, 675 &sensor_dev_attr_in0_max.dev_attr.attr, 676 &sensor_dev_attr_in0_alarm.dev_attr.attr, 677 &sensor_dev_attr_in0_beep.dev_attr.attr, 678 &sensor_dev_attr_in1_input.dev_attr.attr, 679 &sensor_dev_attr_in1_min.dev_attr.attr, 680 &sensor_dev_attr_in1_max.dev_attr.attr, 681 &sensor_dev_attr_in1_alarm.dev_attr.attr, 682 &sensor_dev_attr_in1_beep.dev_attr.attr, 683 &sensor_dev_attr_in2_input.dev_attr.attr, 684 &sensor_dev_attr_in2_min.dev_attr.attr, 685 &sensor_dev_attr_in2_max.dev_attr.attr, 686 &sensor_dev_attr_in2_alarm.dev_attr.attr, 687 &sensor_dev_attr_in2_beep.dev_attr.attr, 688 &sensor_dev_attr_in3_input.dev_attr.attr, 689 &sensor_dev_attr_in3_min.dev_attr.attr, 690 &sensor_dev_attr_in3_max.dev_attr.attr, 691 &sensor_dev_attr_in3_alarm.dev_attr.attr, 692 &sensor_dev_attr_in3_beep.dev_attr.attr, 693 694 &sensor_dev_attr_fan1_input.dev_attr.attr, 695 &sensor_dev_attr_fan1_min.dev_attr.attr, 696 &sensor_dev_attr_fan1_div.dev_attr.attr, 697 &sensor_dev_attr_fan1_alarm.dev_attr.attr, 698 &sensor_dev_attr_fan1_beep.dev_attr.attr, 699 &dev_attr_fan1_off.attr, 700 &sensor_dev_attr_fan2_input.dev_attr.attr, 701 &sensor_dev_attr_fan2_min.dev_attr.attr, 702 &sensor_dev_attr_fan2_div.dev_attr.attr, 703 &sensor_dev_attr_fan2_alarm.dev_attr.attr, 704 &sensor_dev_attr_fan2_beep.dev_attr.attr, 705 706 &sensor_dev_attr_temp1_input.dev_attr.attr, 707 &sensor_dev_attr_temp1_max.dev_attr.attr, 708 &sensor_dev_attr_temp1_max_hyst.dev_attr.attr, 709 &sensor_dev_attr_temp1_alarm.dev_attr.attr, 710 &sensor_dev_attr_temp1_beep.dev_attr.attr, 711 712 &dev_attr_alarms.attr, 713 &dev_attr_beep_enable.attr, 714 &dev_attr_beep_mask.attr, 715 NULL 716 }; 717 718 static const struct attribute_group gl520_group = { 719 .attrs = gl520_attributes, 720 }; 721 722 static struct attribute *gl520_attributes_in4[] = { 723 &sensor_dev_attr_in4_input.dev_attr.attr, 724 &sensor_dev_attr_in4_min.dev_attr.attr, 725 &sensor_dev_attr_in4_max.dev_attr.attr, 726 &sensor_dev_attr_in4_alarm.dev_attr.attr, 727 &sensor_dev_attr_in4_beep.dev_attr.attr, 728 NULL 729 }; 730 731 static struct attribute *gl520_attributes_temp2[] = { 732 &sensor_dev_attr_temp2_input.dev_attr.attr, 733 &sensor_dev_attr_temp2_max.dev_attr.attr, 734 &sensor_dev_attr_temp2_max_hyst.dev_attr.attr, 735 &sensor_dev_attr_temp2_alarm.dev_attr.attr, 736 &sensor_dev_attr_temp2_beep.dev_attr.attr, 737 NULL 738 }; 739 740 static const struct attribute_group gl520_group_in4 = { 741 .attrs = gl520_attributes_in4, 742 }; 743 744 static const struct attribute_group gl520_group_temp2 = { 745 .attrs = gl520_attributes_temp2, 746 }; 747 748 749 /* 750 * Real code 751 */ 752 753 /* Return 0 if detection is successful, -ENODEV otherwise */ 754 static int gl520_detect(struct i2c_client *client, struct i2c_board_info *info) 755 { 756 struct i2c_adapter *adapter = client->adapter; 757 758 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA | 759 I2C_FUNC_SMBUS_WORD_DATA)) 760 return -ENODEV; 761 762 /* Determine the chip type. */ 763 if ((gl520_read_value(client, GL520_REG_CHIP_ID) != 0x20) || 764 ((gl520_read_value(client, GL520_REG_REVISION) & 0x7f) != 0x00) || 765 ((gl520_read_value(client, GL520_REG_CONF) & 0x80) != 0x00)) { 766 dev_dbg(&client->dev, "Unknown chip type, skipping\n"); 767 return -ENODEV; 768 } 769 770 strlcpy(info->type, "gl520sm", I2C_NAME_SIZE); 771 772 return 0; 773 } 774 775 static int gl520_probe(struct i2c_client *client, 776 const struct i2c_device_id *id) 777 { 778 struct gl520_data *data; 779 int err; 780 781 data = devm_kzalloc(&client->dev, sizeof(struct gl520_data), 782 GFP_KERNEL); 783 if (!data) 784 return -ENOMEM; 785 786 i2c_set_clientdata(client, data); 787 mutex_init(&data->update_lock); 788 789 /* Initialize the GL520SM chip */ 790 gl520_init_client(client); 791 792 /* Register sysfs hooks */ 793 err = sysfs_create_group(&client->dev.kobj, &gl520_group); 794 if (err) 795 return err; 796 797 if (data->two_temps) 798 err = sysfs_create_group(&client->dev.kobj, &gl520_group_temp2); 799 else 800 err = sysfs_create_group(&client->dev.kobj, &gl520_group_in4); 801 802 if (err) 803 goto exit_remove_files; 804 805 data->hwmon_dev = hwmon_device_register(&client->dev); 806 if (IS_ERR(data->hwmon_dev)) { 807 err = PTR_ERR(data->hwmon_dev); 808 goto exit_remove_files; 809 } 810 811 return 0; 812 813 exit_remove_files: 814 sysfs_remove_group(&client->dev.kobj, &gl520_group); 815 sysfs_remove_group(&client->dev.kobj, &gl520_group_in4); 816 sysfs_remove_group(&client->dev.kobj, &gl520_group_temp2); 817 return err; 818 } 819 820 821 /* Called when we have found a new GL520SM. */ 822 static void gl520_init_client(struct i2c_client *client) 823 { 824 struct gl520_data *data = i2c_get_clientdata(client); 825 u8 oldconf, conf; 826 827 conf = oldconf = gl520_read_value(client, GL520_REG_CONF); 828 829 data->alarm_mask = 0xff; 830 data->vrm = vid_which_vrm(); 831 832 if (extra_sensor_type == 1) 833 conf &= ~0x10; 834 else if (extra_sensor_type == 2) 835 conf |= 0x10; 836 data->two_temps = !(conf & 0x10); 837 838 /* If IRQ# is disabled, we can safely force comparator mode */ 839 if (!(conf & 0x20)) 840 conf &= 0xf7; 841 842 /* Enable monitoring if needed */ 843 conf |= 0x40; 844 845 if (conf != oldconf) 846 gl520_write_value(client, GL520_REG_CONF, conf); 847 848 gl520_update_device(&(client->dev)); 849 850 if (data->fan_min[0] == 0) 851 data->alarm_mask &= ~0x20; 852 if (data->fan_min[1] == 0) 853 data->alarm_mask &= ~0x40; 854 855 data->beep_mask &= data->alarm_mask; 856 gl520_write_value(client, GL520_REG_BEEP_MASK, data->beep_mask); 857 } 858 859 static int gl520_remove(struct i2c_client *client) 860 { 861 struct gl520_data *data = i2c_get_clientdata(client); 862 863 hwmon_device_unregister(data->hwmon_dev); 864 sysfs_remove_group(&client->dev.kobj, &gl520_group); 865 sysfs_remove_group(&client->dev.kobj, &gl520_group_in4); 866 sysfs_remove_group(&client->dev.kobj, &gl520_group_temp2); 867 868 return 0; 869 } 870 871 872 /* 873 * Registers 0x07 to 0x0c are word-sized, others are byte-sized 874 * GL520 uses a high-byte first convention 875 */ 876 static int gl520_read_value(struct i2c_client *client, u8 reg) 877 { 878 if ((reg >= 0x07) && (reg <= 0x0c)) 879 return i2c_smbus_read_word_swapped(client, reg); 880 else 881 return i2c_smbus_read_byte_data(client, reg); 882 } 883 884 static int gl520_write_value(struct i2c_client *client, u8 reg, u16 value) 885 { 886 if ((reg >= 0x07) && (reg <= 0x0c)) 887 return i2c_smbus_write_word_swapped(client, reg, value); 888 else 889 return i2c_smbus_write_byte_data(client, reg, value); 890 } 891 892 893 static struct gl520_data *gl520_update_device(struct device *dev) 894 { 895 struct i2c_client *client = to_i2c_client(dev); 896 struct gl520_data *data = i2c_get_clientdata(client); 897 int val, i; 898 899 mutex_lock(&data->update_lock); 900 901 if (time_after(jiffies, data->last_updated + 2 * HZ) || !data->valid) { 902 903 dev_dbg(&client->dev, "Starting gl520sm update\n"); 904 905 data->alarms = gl520_read_value(client, GL520_REG_ALARMS); 906 data->beep_mask = gl520_read_value(client, GL520_REG_BEEP_MASK); 907 data->vid = gl520_read_value(client, 908 GL520_REG_VID_INPUT) & 0x1f; 909 910 for (i = 0; i < 4; i++) { 911 data->in_input[i] = gl520_read_value(client, 912 GL520_REG_IN_INPUT[i]); 913 val = gl520_read_value(client, GL520_REG_IN_LIMIT[i]); 914 data->in_min[i] = val & 0xff; 915 data->in_max[i] = (val >> 8) & 0xff; 916 } 917 918 val = gl520_read_value(client, GL520_REG_FAN_INPUT); 919 data->fan_input[0] = (val >> 8) & 0xff; 920 data->fan_input[1] = val & 0xff; 921 922 val = gl520_read_value(client, GL520_REG_FAN_MIN); 923 data->fan_min[0] = (val >> 8) & 0xff; 924 data->fan_min[1] = val & 0xff; 925 926 data->temp_input[0] = gl520_read_value(client, 927 GL520_REG_TEMP_INPUT[0]); 928 data->temp_max[0] = gl520_read_value(client, 929 GL520_REG_TEMP_MAX[0]); 930 data->temp_max_hyst[0] = gl520_read_value(client, 931 GL520_REG_TEMP_MAX_HYST[0]); 932 933 val = gl520_read_value(client, GL520_REG_FAN_DIV); 934 data->fan_div[0] = (val >> 6) & 0x03; 935 data->fan_div[1] = (val >> 4) & 0x03; 936 data->fan_off = (val >> 2) & 0x01; 937 938 data->alarms &= data->alarm_mask; 939 940 val = gl520_read_value(client, GL520_REG_CONF); 941 data->beep_enable = !((val >> 2) & 1); 942 943 /* Temp1 and Vin4 are the same input */ 944 if (data->two_temps) { 945 data->temp_input[1] = gl520_read_value(client, 946 GL520_REG_TEMP_INPUT[1]); 947 data->temp_max[1] = gl520_read_value(client, 948 GL520_REG_TEMP_MAX[1]); 949 data->temp_max_hyst[1] = gl520_read_value(client, 950 GL520_REG_TEMP_MAX_HYST[1]); 951 } else { 952 data->in_input[4] = gl520_read_value(client, 953 GL520_REG_IN_INPUT[4]); 954 data->in_min[4] = gl520_read_value(client, 955 GL520_REG_IN_MIN[4]); 956 data->in_max[4] = gl520_read_value(client, 957 GL520_REG_IN_MAX[4]); 958 } 959 960 data->last_updated = jiffies; 961 data->valid = 1; 962 } 963 964 mutex_unlock(&data->update_lock); 965 966 return data; 967 } 968 969 module_i2c_driver(gl520_driver); 970 971 MODULE_AUTHOR("Frodo Looijaard <frodol@dds.nl>, " 972 "Kyösti Mälkki <kmalkki@cc.hut.fi>, " 973 "Maarten Deprez <maartendeprez@users.sourceforge.net>"); 974 MODULE_DESCRIPTION("GL520SM driver"); 975 MODULE_LICENSE("GPL"); 976