1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * gl520sm.c - Part of lm_sensors, Linux kernel modules for hardware 4 * monitoring 5 * Copyright (c) 1998, 1999 Frodo Looijaard <frodol@dds.nl>, 6 * Kyösti Mälkki <kmalkki@cc.hut.fi> 7 * Copyright (c) 2005 Maarten Deprez <maartendeprez@users.sourceforge.net> 8 */ 9 10 #include <linux/module.h> 11 #include <linux/init.h> 12 #include <linux/slab.h> 13 #include <linux/jiffies.h> 14 #include <linux/i2c.h> 15 #include <linux/hwmon.h> 16 #include <linux/hwmon-sysfs.h> 17 #include <linux/hwmon-vid.h> 18 #include <linux/err.h> 19 #include <linux/mutex.h> 20 #include <linux/sysfs.h> 21 22 /* Type of the extra sensor */ 23 static unsigned short extra_sensor_type; 24 module_param(extra_sensor_type, ushort, 0); 25 MODULE_PARM_DESC(extra_sensor_type, "Type of extra sensor (0=autodetect, 1=temperature, 2=voltage)"); 26 27 /* Addresses to scan */ 28 static const unsigned short normal_i2c[] = { 0x2c, 0x2d, I2C_CLIENT_END }; 29 30 /* 31 * Many GL520 constants specified below 32 * One of the inputs can be configured as either temp or voltage. 33 * That's why _TEMP2 and _IN4 access the same register 34 */ 35 36 /* The GL520 registers */ 37 #define GL520_REG_CHIP_ID 0x00 38 #define GL520_REG_REVISION 0x01 39 #define GL520_REG_CONF 0x03 40 #define GL520_REG_MASK 0x11 41 42 #define GL520_REG_VID_INPUT 0x02 43 44 static const u8 GL520_REG_IN_INPUT[] = { 0x15, 0x14, 0x13, 0x0d, 0x0e }; 45 static const u8 GL520_REG_IN_LIMIT[] = { 0x0c, 0x09, 0x0a, 0x0b }; 46 static const u8 GL520_REG_IN_MIN[] = { 0x0c, 0x09, 0x0a, 0x0b, 0x18 }; 47 static const u8 GL520_REG_IN_MAX[] = { 0x0c, 0x09, 0x0a, 0x0b, 0x17 }; 48 49 static const u8 GL520_REG_TEMP_INPUT[] = { 0x04, 0x0e }; 50 static const u8 GL520_REG_TEMP_MAX[] = { 0x05, 0x17 }; 51 static const u8 GL520_REG_TEMP_MAX_HYST[] = { 0x06, 0x18 }; 52 53 #define GL520_REG_FAN_INPUT 0x07 54 #define GL520_REG_FAN_MIN 0x08 55 #define GL520_REG_FAN_DIV 0x0f 56 #define GL520_REG_FAN_OFF GL520_REG_FAN_DIV 57 58 #define GL520_REG_ALARMS 0x12 59 #define GL520_REG_BEEP_MASK 0x10 60 #define GL520_REG_BEEP_ENABLE GL520_REG_CONF 61 62 /* Client data */ 63 struct gl520_data { 64 struct i2c_client *client; 65 const struct attribute_group *groups[3]; 66 struct mutex update_lock; 67 char valid; /* zero until the following fields are valid */ 68 unsigned long last_updated; /* in jiffies */ 69 70 u8 vid; 71 u8 vrm; 72 u8 in_input[5]; /* [0] = VVD */ 73 u8 in_min[5]; /* [0] = VDD */ 74 u8 in_max[5]; /* [0] = VDD */ 75 u8 fan_input[2]; 76 u8 fan_min[2]; 77 u8 fan_div[2]; 78 u8 fan_off; 79 u8 temp_input[2]; 80 u8 temp_max[2]; 81 u8 temp_max_hyst[2]; 82 u8 alarms; 83 u8 beep_enable; 84 u8 beep_mask; 85 u8 alarm_mask; 86 u8 two_temps; 87 }; 88 89 /* 90 * Registers 0x07 to 0x0c are word-sized, others are byte-sized 91 * GL520 uses a high-byte first convention 92 */ 93 static int gl520_read_value(struct i2c_client *client, u8 reg) 94 { 95 if ((reg >= 0x07) && (reg <= 0x0c)) 96 return i2c_smbus_read_word_swapped(client, reg); 97 else 98 return i2c_smbus_read_byte_data(client, reg); 99 } 100 101 static int gl520_write_value(struct i2c_client *client, u8 reg, u16 value) 102 { 103 if ((reg >= 0x07) && (reg <= 0x0c)) 104 return i2c_smbus_write_word_swapped(client, reg, value); 105 else 106 return i2c_smbus_write_byte_data(client, reg, value); 107 } 108 109 static struct gl520_data *gl520_update_device(struct device *dev) 110 { 111 struct gl520_data *data = dev_get_drvdata(dev); 112 struct i2c_client *client = data->client; 113 int val, i; 114 115 mutex_lock(&data->update_lock); 116 117 if (time_after(jiffies, data->last_updated + 2 * HZ) || !data->valid) { 118 119 dev_dbg(&client->dev, "Starting gl520sm update\n"); 120 121 data->alarms = gl520_read_value(client, GL520_REG_ALARMS); 122 data->beep_mask = gl520_read_value(client, GL520_REG_BEEP_MASK); 123 data->vid = gl520_read_value(client, 124 GL520_REG_VID_INPUT) & 0x1f; 125 126 for (i = 0; i < 4; i++) { 127 data->in_input[i] = gl520_read_value(client, 128 GL520_REG_IN_INPUT[i]); 129 val = gl520_read_value(client, GL520_REG_IN_LIMIT[i]); 130 data->in_min[i] = val & 0xff; 131 data->in_max[i] = (val >> 8) & 0xff; 132 } 133 134 val = gl520_read_value(client, GL520_REG_FAN_INPUT); 135 data->fan_input[0] = (val >> 8) & 0xff; 136 data->fan_input[1] = val & 0xff; 137 138 val = gl520_read_value(client, GL520_REG_FAN_MIN); 139 data->fan_min[0] = (val >> 8) & 0xff; 140 data->fan_min[1] = val & 0xff; 141 142 data->temp_input[0] = gl520_read_value(client, 143 GL520_REG_TEMP_INPUT[0]); 144 data->temp_max[0] = gl520_read_value(client, 145 GL520_REG_TEMP_MAX[0]); 146 data->temp_max_hyst[0] = gl520_read_value(client, 147 GL520_REG_TEMP_MAX_HYST[0]); 148 149 val = gl520_read_value(client, GL520_REG_FAN_DIV); 150 data->fan_div[0] = (val >> 6) & 0x03; 151 data->fan_div[1] = (val >> 4) & 0x03; 152 data->fan_off = (val >> 2) & 0x01; 153 154 data->alarms &= data->alarm_mask; 155 156 val = gl520_read_value(client, GL520_REG_CONF); 157 data->beep_enable = !((val >> 2) & 1); 158 159 /* Temp1 and Vin4 are the same input */ 160 if (data->two_temps) { 161 data->temp_input[1] = gl520_read_value(client, 162 GL520_REG_TEMP_INPUT[1]); 163 data->temp_max[1] = gl520_read_value(client, 164 GL520_REG_TEMP_MAX[1]); 165 data->temp_max_hyst[1] = gl520_read_value(client, 166 GL520_REG_TEMP_MAX_HYST[1]); 167 } else { 168 data->in_input[4] = gl520_read_value(client, 169 GL520_REG_IN_INPUT[4]); 170 data->in_min[4] = gl520_read_value(client, 171 GL520_REG_IN_MIN[4]); 172 data->in_max[4] = gl520_read_value(client, 173 GL520_REG_IN_MAX[4]); 174 } 175 176 data->last_updated = jiffies; 177 data->valid = 1; 178 } 179 180 mutex_unlock(&data->update_lock); 181 182 return data; 183 } 184 185 /* 186 * Sysfs stuff 187 */ 188 189 static ssize_t cpu0_vid_show(struct device *dev, 190 struct device_attribute *attr, char *buf) 191 { 192 struct gl520_data *data = gl520_update_device(dev); 193 return sprintf(buf, "%u\n", vid_from_reg(data->vid, data->vrm)); 194 } 195 static DEVICE_ATTR_RO(cpu0_vid); 196 197 #define VDD_FROM_REG(val) DIV_ROUND_CLOSEST((val) * 95, 4) 198 #define VDD_CLAMP(val) clamp_val(val, 0, 255 * 95 / 4) 199 #define VDD_TO_REG(val) DIV_ROUND_CLOSEST(VDD_CLAMP(val) * 4, 95) 200 201 #define IN_FROM_REG(val) ((val) * 19) 202 #define IN_CLAMP(val) clamp_val(val, 0, 255 * 19) 203 #define IN_TO_REG(val) DIV_ROUND_CLOSEST(IN_CLAMP(val), 19) 204 205 static ssize_t in_input_show(struct device *dev, 206 struct device_attribute *attr, char *buf) 207 { 208 int n = to_sensor_dev_attr(attr)->index; 209 struct gl520_data *data = gl520_update_device(dev); 210 u8 r = data->in_input[n]; 211 212 if (n == 0) 213 return sprintf(buf, "%d\n", VDD_FROM_REG(r)); 214 else 215 return sprintf(buf, "%d\n", IN_FROM_REG(r)); 216 } 217 218 static ssize_t in_min_show(struct device *dev, struct device_attribute *attr, 219 char *buf) 220 { 221 int n = to_sensor_dev_attr(attr)->index; 222 struct gl520_data *data = gl520_update_device(dev); 223 u8 r = data->in_min[n]; 224 225 if (n == 0) 226 return sprintf(buf, "%d\n", VDD_FROM_REG(r)); 227 else 228 return sprintf(buf, "%d\n", IN_FROM_REG(r)); 229 } 230 231 static ssize_t in_max_show(struct device *dev, struct device_attribute *attr, 232 char *buf) 233 { 234 int n = to_sensor_dev_attr(attr)->index; 235 struct gl520_data *data = gl520_update_device(dev); 236 u8 r = data->in_max[n]; 237 238 if (n == 0) 239 return sprintf(buf, "%d\n", VDD_FROM_REG(r)); 240 else 241 return sprintf(buf, "%d\n", IN_FROM_REG(r)); 242 } 243 244 static ssize_t in_min_store(struct device *dev, struct device_attribute *attr, 245 const char *buf, size_t count) 246 { 247 struct gl520_data *data = dev_get_drvdata(dev); 248 struct i2c_client *client = data->client; 249 int n = to_sensor_dev_attr(attr)->index; 250 u8 r; 251 long v; 252 int err; 253 254 err = kstrtol(buf, 10, &v); 255 if (err) 256 return err; 257 258 mutex_lock(&data->update_lock); 259 260 if (n == 0) 261 r = VDD_TO_REG(v); 262 else 263 r = IN_TO_REG(v); 264 265 data->in_min[n] = r; 266 267 if (n < 4) 268 gl520_write_value(client, GL520_REG_IN_MIN[n], 269 (gl520_read_value(client, GL520_REG_IN_MIN[n]) 270 & ~0xff) | r); 271 else 272 gl520_write_value(client, GL520_REG_IN_MIN[n], r); 273 274 mutex_unlock(&data->update_lock); 275 return count; 276 } 277 278 static ssize_t in_max_store(struct device *dev, struct device_attribute *attr, 279 const char *buf, size_t count) 280 { 281 struct gl520_data *data = dev_get_drvdata(dev); 282 struct i2c_client *client = data->client; 283 int n = to_sensor_dev_attr(attr)->index; 284 u8 r; 285 long v; 286 int err; 287 288 err = kstrtol(buf, 10, &v); 289 if (err) 290 return err; 291 292 if (n == 0) 293 r = VDD_TO_REG(v); 294 else 295 r = IN_TO_REG(v); 296 297 mutex_lock(&data->update_lock); 298 299 data->in_max[n] = r; 300 301 if (n < 4) 302 gl520_write_value(client, GL520_REG_IN_MAX[n], 303 (gl520_read_value(client, GL520_REG_IN_MAX[n]) 304 & ~0xff00) | (r << 8)); 305 else 306 gl520_write_value(client, GL520_REG_IN_MAX[n], r); 307 308 mutex_unlock(&data->update_lock); 309 return count; 310 } 311 312 static SENSOR_DEVICE_ATTR_RO(in0_input, in_input, 0); 313 static SENSOR_DEVICE_ATTR_RO(in1_input, in_input, 1); 314 static SENSOR_DEVICE_ATTR_RO(in2_input, in_input, 2); 315 static SENSOR_DEVICE_ATTR_RO(in3_input, in_input, 3); 316 static SENSOR_DEVICE_ATTR_RO(in4_input, in_input, 4); 317 static SENSOR_DEVICE_ATTR_RW(in0_min, in_min, 0); 318 static SENSOR_DEVICE_ATTR_RW(in1_min, in_min, 1); 319 static SENSOR_DEVICE_ATTR_RW(in2_min, in_min, 2); 320 static SENSOR_DEVICE_ATTR_RW(in3_min, in_min, 3); 321 static SENSOR_DEVICE_ATTR_RW(in4_min, in_min, 4); 322 static SENSOR_DEVICE_ATTR_RW(in0_max, in_max, 0); 323 static SENSOR_DEVICE_ATTR_RW(in1_max, in_max, 1); 324 static SENSOR_DEVICE_ATTR_RW(in2_max, in_max, 2); 325 static SENSOR_DEVICE_ATTR_RW(in3_max, in_max, 3); 326 static SENSOR_DEVICE_ATTR_RW(in4_max, in_max, 4); 327 328 #define DIV_FROM_REG(val) (1 << (val)) 329 #define FAN_FROM_REG(val, div) ((val) == 0 ? 0 : (480000 / ((val) << (div)))) 330 331 #define FAN_BASE(div) (480000 >> (div)) 332 #define FAN_CLAMP(val, div) clamp_val(val, FAN_BASE(div) / 255, \ 333 FAN_BASE(div)) 334 #define FAN_TO_REG(val, div) ((val) == 0 ? 0 : \ 335 DIV_ROUND_CLOSEST(480000, \ 336 FAN_CLAMP(val, div) << (div))) 337 338 static ssize_t fan_input_show(struct device *dev, 339 struct device_attribute *attr, char *buf) 340 { 341 int n = to_sensor_dev_attr(attr)->index; 342 struct gl520_data *data = gl520_update_device(dev); 343 344 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_input[n], 345 data->fan_div[n])); 346 } 347 348 static ssize_t fan_min_show(struct device *dev, struct device_attribute *attr, 349 char *buf) 350 { 351 int n = to_sensor_dev_attr(attr)->index; 352 struct gl520_data *data = gl520_update_device(dev); 353 354 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[n], 355 data->fan_div[n])); 356 } 357 358 static ssize_t fan_div_show(struct device *dev, struct device_attribute *attr, 359 char *buf) 360 { 361 int n = to_sensor_dev_attr(attr)->index; 362 struct gl520_data *data = gl520_update_device(dev); 363 364 return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[n])); 365 } 366 367 static ssize_t fan1_off_show(struct device *dev, 368 struct device_attribute *attr, char *buf) 369 { 370 struct gl520_data *data = gl520_update_device(dev); 371 return sprintf(buf, "%d\n", data->fan_off); 372 } 373 374 static ssize_t fan_min_store(struct device *dev, 375 struct device_attribute *attr, const char *buf, 376 size_t count) 377 { 378 struct gl520_data *data = dev_get_drvdata(dev); 379 struct i2c_client *client = data->client; 380 int n = to_sensor_dev_attr(attr)->index; 381 u8 r; 382 unsigned long v; 383 int err; 384 385 err = kstrtoul(buf, 10, &v); 386 if (err) 387 return err; 388 389 mutex_lock(&data->update_lock); 390 r = FAN_TO_REG(v, data->fan_div[n]); 391 data->fan_min[n] = r; 392 393 if (n == 0) 394 gl520_write_value(client, GL520_REG_FAN_MIN, 395 (gl520_read_value(client, GL520_REG_FAN_MIN) 396 & ~0xff00) | (r << 8)); 397 else 398 gl520_write_value(client, GL520_REG_FAN_MIN, 399 (gl520_read_value(client, GL520_REG_FAN_MIN) 400 & ~0xff) | r); 401 402 data->beep_mask = gl520_read_value(client, GL520_REG_BEEP_MASK); 403 if (data->fan_min[n] == 0) 404 data->alarm_mask &= (n == 0) ? ~0x20 : ~0x40; 405 else 406 data->alarm_mask |= (n == 0) ? 0x20 : 0x40; 407 data->beep_mask &= data->alarm_mask; 408 gl520_write_value(client, GL520_REG_BEEP_MASK, data->beep_mask); 409 410 mutex_unlock(&data->update_lock); 411 return count; 412 } 413 414 static ssize_t fan_div_store(struct device *dev, 415 struct device_attribute *attr, const char *buf, 416 size_t count) 417 { 418 struct gl520_data *data = dev_get_drvdata(dev); 419 struct i2c_client *client = data->client; 420 int n = to_sensor_dev_attr(attr)->index; 421 u8 r; 422 unsigned long v; 423 int err; 424 425 err = kstrtoul(buf, 10, &v); 426 if (err) 427 return err; 428 429 switch (v) { 430 case 1: 431 r = 0; 432 break; 433 case 2: 434 r = 1; 435 break; 436 case 4: 437 r = 2; 438 break; 439 case 8: 440 r = 3; 441 break; 442 default: 443 dev_err(&client->dev, 444 "fan_div value %ld not supported. Choose one of 1, 2, 4 or 8!\n", v); 445 return -EINVAL; 446 } 447 448 mutex_lock(&data->update_lock); 449 data->fan_div[n] = r; 450 451 if (n == 0) 452 gl520_write_value(client, GL520_REG_FAN_DIV, 453 (gl520_read_value(client, GL520_REG_FAN_DIV) 454 & ~0xc0) | (r << 6)); 455 else 456 gl520_write_value(client, GL520_REG_FAN_DIV, 457 (gl520_read_value(client, GL520_REG_FAN_DIV) 458 & ~0x30) | (r << 4)); 459 460 mutex_unlock(&data->update_lock); 461 return count; 462 } 463 464 static ssize_t fan1_off_store(struct device *dev, 465 struct device_attribute *attr, const char *buf, 466 size_t count) 467 { 468 struct gl520_data *data = dev_get_drvdata(dev); 469 struct i2c_client *client = data->client; 470 u8 r; 471 unsigned long v; 472 int err; 473 474 err = kstrtoul(buf, 10, &v); 475 if (err) 476 return err; 477 478 r = (v ? 1 : 0); 479 480 mutex_lock(&data->update_lock); 481 data->fan_off = r; 482 gl520_write_value(client, GL520_REG_FAN_OFF, 483 (gl520_read_value(client, GL520_REG_FAN_OFF) 484 & ~0x0c) | (r << 2)); 485 mutex_unlock(&data->update_lock); 486 return count; 487 } 488 489 static SENSOR_DEVICE_ATTR_RO(fan1_input, fan_input, 0); 490 static SENSOR_DEVICE_ATTR_RO(fan2_input, fan_input, 1); 491 static SENSOR_DEVICE_ATTR_RW(fan1_min, fan_min, 0); 492 static SENSOR_DEVICE_ATTR_RW(fan2_min, fan_min, 1); 493 static SENSOR_DEVICE_ATTR_RW(fan1_div, fan_div, 0); 494 static SENSOR_DEVICE_ATTR_RW(fan2_div, fan_div, 1); 495 static DEVICE_ATTR_RW(fan1_off); 496 497 #define TEMP_FROM_REG(val) (((val) - 130) * 1000) 498 #define TEMP_CLAMP(val) clamp_val(val, -130000, 125000) 499 #define TEMP_TO_REG(val) (DIV_ROUND_CLOSEST(TEMP_CLAMP(val), 1000) + 130) 500 501 static ssize_t temp_input_show(struct device *dev, 502 struct device_attribute *attr, char *buf) 503 { 504 int n = to_sensor_dev_attr(attr)->index; 505 struct gl520_data *data = gl520_update_device(dev); 506 507 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_input[n])); 508 } 509 510 static ssize_t temp_max_show(struct device *dev, 511 struct device_attribute *attr, char *buf) 512 { 513 int n = to_sensor_dev_attr(attr)->index; 514 struct gl520_data *data = gl520_update_device(dev); 515 516 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max[n])); 517 } 518 519 static ssize_t temp_max_hyst_show(struct device *dev, 520 struct device_attribute *attr, char *buf) 521 { 522 int n = to_sensor_dev_attr(attr)->index; 523 struct gl520_data *data = gl520_update_device(dev); 524 525 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max_hyst[n])); 526 } 527 528 static ssize_t temp_max_store(struct device *dev, 529 struct device_attribute *attr, const char *buf, 530 size_t count) 531 { 532 struct gl520_data *data = dev_get_drvdata(dev); 533 struct i2c_client *client = data->client; 534 int n = to_sensor_dev_attr(attr)->index; 535 long v; 536 int err; 537 538 err = kstrtol(buf, 10, &v); 539 if (err) 540 return err; 541 542 mutex_lock(&data->update_lock); 543 data->temp_max[n] = TEMP_TO_REG(v); 544 gl520_write_value(client, GL520_REG_TEMP_MAX[n], data->temp_max[n]); 545 mutex_unlock(&data->update_lock); 546 return count; 547 } 548 549 static ssize_t temp_max_hyst_store(struct device *dev, 550 struct device_attribute *attr, 551 const char *buf, size_t count) 552 { 553 struct gl520_data *data = dev_get_drvdata(dev); 554 struct i2c_client *client = data->client; 555 int n = to_sensor_dev_attr(attr)->index; 556 long v; 557 int err; 558 559 err = kstrtol(buf, 10, &v); 560 if (err) 561 return err; 562 563 mutex_lock(&data->update_lock); 564 data->temp_max_hyst[n] = TEMP_TO_REG(v); 565 gl520_write_value(client, GL520_REG_TEMP_MAX_HYST[n], 566 data->temp_max_hyst[n]); 567 mutex_unlock(&data->update_lock); 568 return count; 569 } 570 571 static SENSOR_DEVICE_ATTR_RO(temp1_input, temp_input, 0); 572 static SENSOR_DEVICE_ATTR_RO(temp2_input, temp_input, 1); 573 static SENSOR_DEVICE_ATTR_RW(temp1_max, temp_max, 0); 574 static SENSOR_DEVICE_ATTR_RW(temp2_max, temp_max, 1); 575 static SENSOR_DEVICE_ATTR_RW(temp1_max_hyst, temp_max_hyst, 0); 576 static SENSOR_DEVICE_ATTR_RW(temp2_max_hyst, temp_max_hyst, 1); 577 578 static ssize_t alarms_show(struct device *dev, struct device_attribute *attr, 579 char *buf) 580 { 581 struct gl520_data *data = gl520_update_device(dev); 582 return sprintf(buf, "%d\n", data->alarms); 583 } 584 585 static ssize_t beep_enable_show(struct device *dev, 586 struct device_attribute *attr, char *buf) 587 { 588 struct gl520_data *data = gl520_update_device(dev); 589 return sprintf(buf, "%d\n", data->beep_enable); 590 } 591 592 static ssize_t beep_mask_show(struct device *dev, 593 struct device_attribute *attr, char *buf) 594 { 595 struct gl520_data *data = gl520_update_device(dev); 596 return sprintf(buf, "%d\n", data->beep_mask); 597 } 598 599 static ssize_t beep_enable_store(struct device *dev, 600 struct device_attribute *attr, 601 const char *buf, size_t count) 602 { 603 struct gl520_data *data = dev_get_drvdata(dev); 604 struct i2c_client *client = data->client; 605 u8 r; 606 unsigned long v; 607 int err; 608 609 err = kstrtoul(buf, 10, &v); 610 if (err) 611 return err; 612 613 r = (v ? 0 : 1); 614 615 mutex_lock(&data->update_lock); 616 data->beep_enable = !r; 617 gl520_write_value(client, GL520_REG_BEEP_ENABLE, 618 (gl520_read_value(client, GL520_REG_BEEP_ENABLE) 619 & ~0x04) | (r << 2)); 620 mutex_unlock(&data->update_lock); 621 return count; 622 } 623 624 static ssize_t beep_mask_store(struct device *dev, 625 struct device_attribute *attr, const char *buf, 626 size_t count) 627 { 628 struct gl520_data *data = dev_get_drvdata(dev); 629 struct i2c_client *client = data->client; 630 unsigned long r; 631 int err; 632 633 err = kstrtoul(buf, 10, &r); 634 if (err) 635 return err; 636 637 mutex_lock(&data->update_lock); 638 r &= data->alarm_mask; 639 data->beep_mask = r; 640 gl520_write_value(client, GL520_REG_BEEP_MASK, r); 641 mutex_unlock(&data->update_lock); 642 return count; 643 } 644 645 static DEVICE_ATTR_RO(alarms); 646 static DEVICE_ATTR_RW(beep_enable); 647 static DEVICE_ATTR_RW(beep_mask); 648 649 static ssize_t alarm_show(struct device *dev, struct device_attribute *attr, 650 char *buf) 651 { 652 int bit_nr = to_sensor_dev_attr(attr)->index; 653 struct gl520_data *data = gl520_update_device(dev); 654 655 return sprintf(buf, "%d\n", (data->alarms >> bit_nr) & 1); 656 } 657 658 static SENSOR_DEVICE_ATTR_RO(in0_alarm, alarm, 0); 659 static SENSOR_DEVICE_ATTR_RO(in1_alarm, alarm, 1); 660 static SENSOR_DEVICE_ATTR_RO(in2_alarm, alarm, 2); 661 static SENSOR_DEVICE_ATTR_RO(in3_alarm, alarm, 3); 662 static SENSOR_DEVICE_ATTR_RO(temp1_alarm, alarm, 4); 663 static SENSOR_DEVICE_ATTR_RO(fan1_alarm, alarm, 5); 664 static SENSOR_DEVICE_ATTR_RO(fan2_alarm, alarm, 6); 665 static SENSOR_DEVICE_ATTR_RO(temp2_alarm, alarm, 7); 666 static SENSOR_DEVICE_ATTR_RO(in4_alarm, alarm, 7); 667 668 static ssize_t beep_show(struct device *dev, struct device_attribute *attr, 669 char *buf) 670 { 671 int bitnr = to_sensor_dev_attr(attr)->index; 672 struct gl520_data *data = gl520_update_device(dev); 673 674 return sprintf(buf, "%d\n", (data->beep_mask >> bitnr) & 1); 675 } 676 677 static ssize_t beep_store(struct device *dev, struct device_attribute *attr, 678 const char *buf, size_t count) 679 { 680 struct gl520_data *data = dev_get_drvdata(dev); 681 struct i2c_client *client = data->client; 682 int bitnr = to_sensor_dev_attr(attr)->index; 683 unsigned long bit; 684 685 int err; 686 687 err = kstrtoul(buf, 10, &bit); 688 if (err) 689 return err; 690 if (bit & ~1) 691 return -EINVAL; 692 693 mutex_lock(&data->update_lock); 694 data->beep_mask = gl520_read_value(client, GL520_REG_BEEP_MASK); 695 if (bit) 696 data->beep_mask |= (1 << bitnr); 697 else 698 data->beep_mask &= ~(1 << bitnr); 699 gl520_write_value(client, GL520_REG_BEEP_MASK, data->beep_mask); 700 mutex_unlock(&data->update_lock); 701 return count; 702 } 703 704 static SENSOR_DEVICE_ATTR_RW(in0_beep, beep, 0); 705 static SENSOR_DEVICE_ATTR_RW(in1_beep, beep, 1); 706 static SENSOR_DEVICE_ATTR_RW(in2_beep, beep, 2); 707 static SENSOR_DEVICE_ATTR_RW(in3_beep, beep, 3); 708 static SENSOR_DEVICE_ATTR_RW(temp1_beep, beep, 4); 709 static SENSOR_DEVICE_ATTR_RW(fan1_beep, beep, 5); 710 static SENSOR_DEVICE_ATTR_RW(fan2_beep, beep, 6); 711 static SENSOR_DEVICE_ATTR_RW(temp2_beep, beep, 7); 712 static SENSOR_DEVICE_ATTR_RW(in4_beep, beep, 7); 713 714 static struct attribute *gl520_attributes[] = { 715 &dev_attr_cpu0_vid.attr, 716 717 &sensor_dev_attr_in0_input.dev_attr.attr, 718 &sensor_dev_attr_in0_min.dev_attr.attr, 719 &sensor_dev_attr_in0_max.dev_attr.attr, 720 &sensor_dev_attr_in0_alarm.dev_attr.attr, 721 &sensor_dev_attr_in0_beep.dev_attr.attr, 722 &sensor_dev_attr_in1_input.dev_attr.attr, 723 &sensor_dev_attr_in1_min.dev_attr.attr, 724 &sensor_dev_attr_in1_max.dev_attr.attr, 725 &sensor_dev_attr_in1_alarm.dev_attr.attr, 726 &sensor_dev_attr_in1_beep.dev_attr.attr, 727 &sensor_dev_attr_in2_input.dev_attr.attr, 728 &sensor_dev_attr_in2_min.dev_attr.attr, 729 &sensor_dev_attr_in2_max.dev_attr.attr, 730 &sensor_dev_attr_in2_alarm.dev_attr.attr, 731 &sensor_dev_attr_in2_beep.dev_attr.attr, 732 &sensor_dev_attr_in3_input.dev_attr.attr, 733 &sensor_dev_attr_in3_min.dev_attr.attr, 734 &sensor_dev_attr_in3_max.dev_attr.attr, 735 &sensor_dev_attr_in3_alarm.dev_attr.attr, 736 &sensor_dev_attr_in3_beep.dev_attr.attr, 737 738 &sensor_dev_attr_fan1_input.dev_attr.attr, 739 &sensor_dev_attr_fan1_min.dev_attr.attr, 740 &sensor_dev_attr_fan1_div.dev_attr.attr, 741 &sensor_dev_attr_fan1_alarm.dev_attr.attr, 742 &sensor_dev_attr_fan1_beep.dev_attr.attr, 743 &dev_attr_fan1_off.attr, 744 &sensor_dev_attr_fan2_input.dev_attr.attr, 745 &sensor_dev_attr_fan2_min.dev_attr.attr, 746 &sensor_dev_attr_fan2_div.dev_attr.attr, 747 &sensor_dev_attr_fan2_alarm.dev_attr.attr, 748 &sensor_dev_attr_fan2_beep.dev_attr.attr, 749 750 &sensor_dev_attr_temp1_input.dev_attr.attr, 751 &sensor_dev_attr_temp1_max.dev_attr.attr, 752 &sensor_dev_attr_temp1_max_hyst.dev_attr.attr, 753 &sensor_dev_attr_temp1_alarm.dev_attr.attr, 754 &sensor_dev_attr_temp1_beep.dev_attr.attr, 755 756 &dev_attr_alarms.attr, 757 &dev_attr_beep_enable.attr, 758 &dev_attr_beep_mask.attr, 759 NULL 760 }; 761 762 static const struct attribute_group gl520_group = { 763 .attrs = gl520_attributes, 764 }; 765 766 static struct attribute *gl520_attributes_in4[] = { 767 &sensor_dev_attr_in4_input.dev_attr.attr, 768 &sensor_dev_attr_in4_min.dev_attr.attr, 769 &sensor_dev_attr_in4_max.dev_attr.attr, 770 &sensor_dev_attr_in4_alarm.dev_attr.attr, 771 &sensor_dev_attr_in4_beep.dev_attr.attr, 772 NULL 773 }; 774 775 static struct attribute *gl520_attributes_temp2[] = { 776 &sensor_dev_attr_temp2_input.dev_attr.attr, 777 &sensor_dev_attr_temp2_max.dev_attr.attr, 778 &sensor_dev_attr_temp2_max_hyst.dev_attr.attr, 779 &sensor_dev_attr_temp2_alarm.dev_attr.attr, 780 &sensor_dev_attr_temp2_beep.dev_attr.attr, 781 NULL 782 }; 783 784 static const struct attribute_group gl520_group_in4 = { 785 .attrs = gl520_attributes_in4, 786 }; 787 788 static const struct attribute_group gl520_group_temp2 = { 789 .attrs = gl520_attributes_temp2, 790 }; 791 792 793 /* 794 * Real code 795 */ 796 797 /* Return 0 if detection is successful, -ENODEV otherwise */ 798 static int gl520_detect(struct i2c_client *client, struct i2c_board_info *info) 799 { 800 struct i2c_adapter *adapter = client->adapter; 801 802 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA | 803 I2C_FUNC_SMBUS_WORD_DATA)) 804 return -ENODEV; 805 806 /* Determine the chip type. */ 807 if ((gl520_read_value(client, GL520_REG_CHIP_ID) != 0x20) || 808 ((gl520_read_value(client, GL520_REG_REVISION) & 0x7f) != 0x00) || 809 ((gl520_read_value(client, GL520_REG_CONF) & 0x80) != 0x00)) { 810 dev_dbg(&client->dev, "Unknown chip type, skipping\n"); 811 return -ENODEV; 812 } 813 814 strlcpy(info->type, "gl520sm", I2C_NAME_SIZE); 815 816 return 0; 817 } 818 819 /* Called when we have found a new GL520SM. */ 820 static void gl520_init_client(struct i2c_client *client) 821 { 822 struct gl520_data *data = i2c_get_clientdata(client); 823 u8 oldconf, conf; 824 825 conf = oldconf = gl520_read_value(client, GL520_REG_CONF); 826 827 data->alarm_mask = 0xff; 828 data->vrm = vid_which_vrm(); 829 830 if (extra_sensor_type == 1) 831 conf &= ~0x10; 832 else if (extra_sensor_type == 2) 833 conf |= 0x10; 834 data->two_temps = !(conf & 0x10); 835 836 /* If IRQ# is disabled, we can safely force comparator mode */ 837 if (!(conf & 0x20)) 838 conf &= 0xf7; 839 840 /* Enable monitoring if needed */ 841 conf |= 0x40; 842 843 if (conf != oldconf) 844 gl520_write_value(client, GL520_REG_CONF, conf); 845 846 gl520_update_device(&(client->dev)); 847 848 if (data->fan_min[0] == 0) 849 data->alarm_mask &= ~0x20; 850 if (data->fan_min[1] == 0) 851 data->alarm_mask &= ~0x40; 852 853 data->beep_mask &= data->alarm_mask; 854 gl520_write_value(client, GL520_REG_BEEP_MASK, data->beep_mask); 855 } 856 857 static int gl520_probe(struct i2c_client *client) 858 { 859 struct device *dev = &client->dev; 860 struct device *hwmon_dev; 861 struct gl520_data *data; 862 863 data = devm_kzalloc(dev, sizeof(struct gl520_data), GFP_KERNEL); 864 if (!data) 865 return -ENOMEM; 866 867 i2c_set_clientdata(client, data); 868 mutex_init(&data->update_lock); 869 data->client = client; 870 871 /* Initialize the GL520SM chip */ 872 gl520_init_client(client); 873 874 /* sysfs hooks */ 875 data->groups[0] = &gl520_group; 876 877 if (data->two_temps) 878 data->groups[1] = &gl520_group_temp2; 879 else 880 data->groups[1] = &gl520_group_in4; 881 882 hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name, 883 data, data->groups); 884 return PTR_ERR_OR_ZERO(hwmon_dev); 885 } 886 887 static const struct i2c_device_id gl520_id[] = { 888 { "gl520sm", 0 }, 889 { } 890 }; 891 MODULE_DEVICE_TABLE(i2c, gl520_id); 892 893 static struct i2c_driver gl520_driver = { 894 .class = I2C_CLASS_HWMON, 895 .driver = { 896 .name = "gl520sm", 897 }, 898 .probe_new = gl520_probe, 899 .id_table = gl520_id, 900 .detect = gl520_detect, 901 .address_list = normal_i2c, 902 }; 903 904 module_i2c_driver(gl520_driver); 905 906 MODULE_AUTHOR("Frodo Looijaard <frodol@dds.nl>, " 907 "Kyösti Mälkki <kmalkki@cc.hut.fi>, " 908 "Maarten Deprez <maartendeprez@users.sourceforge.net>"); 909 MODULE_DESCRIPTION("GL520SM driver"); 910 MODULE_LICENSE("GPL"); 911