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 /* Client data */ 77 struct gl520_data { 78 struct i2c_client *client; 79 const struct attribute_group *groups[3]; 80 struct mutex update_lock; 81 char valid; /* zero until the following fields are valid */ 82 unsigned long last_updated; /* in jiffies */ 83 84 u8 vid; 85 u8 vrm; 86 u8 in_input[5]; /* [0] = VVD */ 87 u8 in_min[5]; /* [0] = VDD */ 88 u8 in_max[5]; /* [0] = VDD */ 89 u8 fan_input[2]; 90 u8 fan_min[2]; 91 u8 fan_div[2]; 92 u8 fan_off; 93 u8 temp_input[2]; 94 u8 temp_max[2]; 95 u8 temp_max_hyst[2]; 96 u8 alarms; 97 u8 beep_enable; 98 u8 beep_mask; 99 u8 alarm_mask; 100 u8 two_temps; 101 }; 102 103 /* 104 * Registers 0x07 to 0x0c are word-sized, others are byte-sized 105 * GL520 uses a high-byte first convention 106 */ 107 static int gl520_read_value(struct i2c_client *client, u8 reg) 108 { 109 if ((reg >= 0x07) && (reg <= 0x0c)) 110 return i2c_smbus_read_word_swapped(client, reg); 111 else 112 return i2c_smbus_read_byte_data(client, reg); 113 } 114 115 static int gl520_write_value(struct i2c_client *client, u8 reg, u16 value) 116 { 117 if ((reg >= 0x07) && (reg <= 0x0c)) 118 return i2c_smbus_write_word_swapped(client, reg, value); 119 else 120 return i2c_smbus_write_byte_data(client, reg, value); 121 } 122 123 static struct gl520_data *gl520_update_device(struct device *dev) 124 { 125 struct gl520_data *data = dev_get_drvdata(dev); 126 struct i2c_client *client = data->client; 127 int val, i; 128 129 mutex_lock(&data->update_lock); 130 131 if (time_after(jiffies, data->last_updated + 2 * HZ) || !data->valid) { 132 133 dev_dbg(&client->dev, "Starting gl520sm update\n"); 134 135 data->alarms = gl520_read_value(client, GL520_REG_ALARMS); 136 data->beep_mask = gl520_read_value(client, GL520_REG_BEEP_MASK); 137 data->vid = gl520_read_value(client, 138 GL520_REG_VID_INPUT) & 0x1f; 139 140 for (i = 0; i < 4; i++) { 141 data->in_input[i] = gl520_read_value(client, 142 GL520_REG_IN_INPUT[i]); 143 val = gl520_read_value(client, GL520_REG_IN_LIMIT[i]); 144 data->in_min[i] = val & 0xff; 145 data->in_max[i] = (val >> 8) & 0xff; 146 } 147 148 val = gl520_read_value(client, GL520_REG_FAN_INPUT); 149 data->fan_input[0] = (val >> 8) & 0xff; 150 data->fan_input[1] = val & 0xff; 151 152 val = gl520_read_value(client, GL520_REG_FAN_MIN); 153 data->fan_min[0] = (val >> 8) & 0xff; 154 data->fan_min[1] = val & 0xff; 155 156 data->temp_input[0] = gl520_read_value(client, 157 GL520_REG_TEMP_INPUT[0]); 158 data->temp_max[0] = gl520_read_value(client, 159 GL520_REG_TEMP_MAX[0]); 160 data->temp_max_hyst[0] = gl520_read_value(client, 161 GL520_REG_TEMP_MAX_HYST[0]); 162 163 val = gl520_read_value(client, GL520_REG_FAN_DIV); 164 data->fan_div[0] = (val >> 6) & 0x03; 165 data->fan_div[1] = (val >> 4) & 0x03; 166 data->fan_off = (val >> 2) & 0x01; 167 168 data->alarms &= data->alarm_mask; 169 170 val = gl520_read_value(client, GL520_REG_CONF); 171 data->beep_enable = !((val >> 2) & 1); 172 173 /* Temp1 and Vin4 are the same input */ 174 if (data->two_temps) { 175 data->temp_input[1] = gl520_read_value(client, 176 GL520_REG_TEMP_INPUT[1]); 177 data->temp_max[1] = gl520_read_value(client, 178 GL520_REG_TEMP_MAX[1]); 179 data->temp_max_hyst[1] = gl520_read_value(client, 180 GL520_REG_TEMP_MAX_HYST[1]); 181 } else { 182 data->in_input[4] = gl520_read_value(client, 183 GL520_REG_IN_INPUT[4]); 184 data->in_min[4] = gl520_read_value(client, 185 GL520_REG_IN_MIN[4]); 186 data->in_max[4] = gl520_read_value(client, 187 GL520_REG_IN_MAX[4]); 188 } 189 190 data->last_updated = jiffies; 191 data->valid = 1; 192 } 193 194 mutex_unlock(&data->update_lock); 195 196 return data; 197 } 198 199 /* 200 * Sysfs stuff 201 */ 202 203 static ssize_t cpu0_vid_show(struct device *dev, 204 struct device_attribute *attr, char *buf) 205 { 206 struct gl520_data *data = gl520_update_device(dev); 207 return sprintf(buf, "%u\n", vid_from_reg(data->vid, data->vrm)); 208 } 209 static DEVICE_ATTR_RO(cpu0_vid); 210 211 #define VDD_FROM_REG(val) DIV_ROUND_CLOSEST((val) * 95, 4) 212 #define VDD_CLAMP(val) clamp_val(val, 0, 255 * 95 / 4) 213 #define VDD_TO_REG(val) DIV_ROUND_CLOSEST(VDD_CLAMP(val) * 4, 95) 214 215 #define IN_FROM_REG(val) ((val) * 19) 216 #define IN_CLAMP(val) clamp_val(val, 0, 255 * 19) 217 #define IN_TO_REG(val) DIV_ROUND_CLOSEST(IN_CLAMP(val), 19) 218 219 static ssize_t in_input_show(struct device *dev, 220 struct device_attribute *attr, char *buf) 221 { 222 int n = to_sensor_dev_attr(attr)->index; 223 struct gl520_data *data = gl520_update_device(dev); 224 u8 r = data->in_input[n]; 225 226 if (n == 0) 227 return sprintf(buf, "%d\n", VDD_FROM_REG(r)); 228 else 229 return sprintf(buf, "%d\n", IN_FROM_REG(r)); 230 } 231 232 static ssize_t in_min_show(struct device *dev, struct device_attribute *attr, 233 char *buf) 234 { 235 int n = to_sensor_dev_attr(attr)->index; 236 struct gl520_data *data = gl520_update_device(dev); 237 u8 r = data->in_min[n]; 238 239 if (n == 0) 240 return sprintf(buf, "%d\n", VDD_FROM_REG(r)); 241 else 242 return sprintf(buf, "%d\n", IN_FROM_REG(r)); 243 } 244 245 static ssize_t in_max_show(struct device *dev, struct device_attribute *attr, 246 char *buf) 247 { 248 int n = to_sensor_dev_attr(attr)->index; 249 struct gl520_data *data = gl520_update_device(dev); 250 u8 r = data->in_max[n]; 251 252 if (n == 0) 253 return sprintf(buf, "%d\n", VDD_FROM_REG(r)); 254 else 255 return sprintf(buf, "%d\n", IN_FROM_REG(r)); 256 } 257 258 static ssize_t in_min_store(struct device *dev, struct device_attribute *attr, 259 const char *buf, size_t count) 260 { 261 struct gl520_data *data = dev_get_drvdata(dev); 262 struct i2c_client *client = data->client; 263 int n = to_sensor_dev_attr(attr)->index; 264 u8 r; 265 long v; 266 int err; 267 268 err = kstrtol(buf, 10, &v); 269 if (err) 270 return err; 271 272 mutex_lock(&data->update_lock); 273 274 if (n == 0) 275 r = VDD_TO_REG(v); 276 else 277 r = IN_TO_REG(v); 278 279 data->in_min[n] = r; 280 281 if (n < 4) 282 gl520_write_value(client, GL520_REG_IN_MIN[n], 283 (gl520_read_value(client, GL520_REG_IN_MIN[n]) 284 & ~0xff) | r); 285 else 286 gl520_write_value(client, GL520_REG_IN_MIN[n], r); 287 288 mutex_unlock(&data->update_lock); 289 return count; 290 } 291 292 static ssize_t in_max_store(struct device *dev, struct device_attribute *attr, 293 const char *buf, size_t count) 294 { 295 struct gl520_data *data = dev_get_drvdata(dev); 296 struct i2c_client *client = data->client; 297 int n = to_sensor_dev_attr(attr)->index; 298 u8 r; 299 long v; 300 int err; 301 302 err = kstrtol(buf, 10, &v); 303 if (err) 304 return err; 305 306 if (n == 0) 307 r = VDD_TO_REG(v); 308 else 309 r = IN_TO_REG(v); 310 311 mutex_lock(&data->update_lock); 312 313 data->in_max[n] = r; 314 315 if (n < 4) 316 gl520_write_value(client, GL520_REG_IN_MAX[n], 317 (gl520_read_value(client, GL520_REG_IN_MAX[n]) 318 & ~0xff00) | (r << 8)); 319 else 320 gl520_write_value(client, GL520_REG_IN_MAX[n], r); 321 322 mutex_unlock(&data->update_lock); 323 return count; 324 } 325 326 static SENSOR_DEVICE_ATTR_RO(in0_input, in_input, 0); 327 static SENSOR_DEVICE_ATTR_RO(in1_input, in_input, 1); 328 static SENSOR_DEVICE_ATTR_RO(in2_input, in_input, 2); 329 static SENSOR_DEVICE_ATTR_RO(in3_input, in_input, 3); 330 static SENSOR_DEVICE_ATTR_RO(in4_input, in_input, 4); 331 static SENSOR_DEVICE_ATTR_RW(in0_min, in_min, 0); 332 static SENSOR_DEVICE_ATTR_RW(in1_min, in_min, 1); 333 static SENSOR_DEVICE_ATTR_RW(in2_min, in_min, 2); 334 static SENSOR_DEVICE_ATTR_RW(in3_min, in_min, 3); 335 static SENSOR_DEVICE_ATTR_RW(in4_min, in_min, 4); 336 static SENSOR_DEVICE_ATTR_RW(in0_max, in_max, 0); 337 static SENSOR_DEVICE_ATTR_RW(in1_max, in_max, 1); 338 static SENSOR_DEVICE_ATTR_RW(in2_max, in_max, 2); 339 static SENSOR_DEVICE_ATTR_RW(in3_max, in_max, 3); 340 static SENSOR_DEVICE_ATTR_RW(in4_max, in_max, 4); 341 342 #define DIV_FROM_REG(val) (1 << (val)) 343 #define FAN_FROM_REG(val, div) ((val) == 0 ? 0 : (480000 / ((val) << (div)))) 344 345 #define FAN_BASE(div) (480000 >> (div)) 346 #define FAN_CLAMP(val, div) clamp_val(val, FAN_BASE(div) / 255, \ 347 FAN_BASE(div)) 348 #define FAN_TO_REG(val, div) ((val) == 0 ? 0 : \ 349 DIV_ROUND_CLOSEST(480000, \ 350 FAN_CLAMP(val, div) << (div))) 351 352 static ssize_t fan_input_show(struct device *dev, 353 struct device_attribute *attr, char *buf) 354 { 355 int n = to_sensor_dev_attr(attr)->index; 356 struct gl520_data *data = gl520_update_device(dev); 357 358 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_input[n], 359 data->fan_div[n])); 360 } 361 362 static ssize_t fan_min_show(struct device *dev, struct device_attribute *attr, 363 char *buf) 364 { 365 int n = to_sensor_dev_attr(attr)->index; 366 struct gl520_data *data = gl520_update_device(dev); 367 368 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[n], 369 data->fan_div[n])); 370 } 371 372 static ssize_t fan_div_show(struct device *dev, struct device_attribute *attr, 373 char *buf) 374 { 375 int n = to_sensor_dev_attr(attr)->index; 376 struct gl520_data *data = gl520_update_device(dev); 377 378 return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[n])); 379 } 380 381 static ssize_t fan1_off_show(struct device *dev, 382 struct device_attribute *attr, char *buf) 383 { 384 struct gl520_data *data = gl520_update_device(dev); 385 return sprintf(buf, "%d\n", data->fan_off); 386 } 387 388 static ssize_t fan_min_store(struct device *dev, 389 struct device_attribute *attr, const char *buf, 390 size_t count) 391 { 392 struct gl520_data *data = dev_get_drvdata(dev); 393 struct i2c_client *client = data->client; 394 int n = to_sensor_dev_attr(attr)->index; 395 u8 r; 396 unsigned long v; 397 int err; 398 399 err = kstrtoul(buf, 10, &v); 400 if (err) 401 return err; 402 403 mutex_lock(&data->update_lock); 404 r = FAN_TO_REG(v, data->fan_div[n]); 405 data->fan_min[n] = r; 406 407 if (n == 0) 408 gl520_write_value(client, GL520_REG_FAN_MIN, 409 (gl520_read_value(client, GL520_REG_FAN_MIN) 410 & ~0xff00) | (r << 8)); 411 else 412 gl520_write_value(client, GL520_REG_FAN_MIN, 413 (gl520_read_value(client, GL520_REG_FAN_MIN) 414 & ~0xff) | r); 415 416 data->beep_mask = gl520_read_value(client, GL520_REG_BEEP_MASK); 417 if (data->fan_min[n] == 0) 418 data->alarm_mask &= (n == 0) ? ~0x20 : ~0x40; 419 else 420 data->alarm_mask |= (n == 0) ? 0x20 : 0x40; 421 data->beep_mask &= data->alarm_mask; 422 gl520_write_value(client, GL520_REG_BEEP_MASK, data->beep_mask); 423 424 mutex_unlock(&data->update_lock); 425 return count; 426 } 427 428 static ssize_t fan_div_store(struct device *dev, 429 struct device_attribute *attr, const char *buf, 430 size_t count) 431 { 432 struct gl520_data *data = dev_get_drvdata(dev); 433 struct i2c_client *client = data->client; 434 int n = to_sensor_dev_attr(attr)->index; 435 u8 r; 436 unsigned long v; 437 int err; 438 439 err = kstrtoul(buf, 10, &v); 440 if (err) 441 return err; 442 443 switch (v) { 444 case 1: 445 r = 0; 446 break; 447 case 2: 448 r = 1; 449 break; 450 case 4: 451 r = 2; 452 break; 453 case 8: 454 r = 3; 455 break; 456 default: 457 dev_err(&client->dev, 458 "fan_div value %ld not supported. Choose one of 1, 2, 4 or 8!\n", v); 459 return -EINVAL; 460 } 461 462 mutex_lock(&data->update_lock); 463 data->fan_div[n] = r; 464 465 if (n == 0) 466 gl520_write_value(client, GL520_REG_FAN_DIV, 467 (gl520_read_value(client, GL520_REG_FAN_DIV) 468 & ~0xc0) | (r << 6)); 469 else 470 gl520_write_value(client, GL520_REG_FAN_DIV, 471 (gl520_read_value(client, GL520_REG_FAN_DIV) 472 & ~0x30) | (r << 4)); 473 474 mutex_unlock(&data->update_lock); 475 return count; 476 } 477 478 static ssize_t fan1_off_store(struct device *dev, 479 struct device_attribute *attr, const char *buf, 480 size_t count) 481 { 482 struct gl520_data *data = dev_get_drvdata(dev); 483 struct i2c_client *client = data->client; 484 u8 r; 485 unsigned long v; 486 int err; 487 488 err = kstrtoul(buf, 10, &v); 489 if (err) 490 return err; 491 492 r = (v ? 1 : 0); 493 494 mutex_lock(&data->update_lock); 495 data->fan_off = r; 496 gl520_write_value(client, GL520_REG_FAN_OFF, 497 (gl520_read_value(client, GL520_REG_FAN_OFF) 498 & ~0x0c) | (r << 2)); 499 mutex_unlock(&data->update_lock); 500 return count; 501 } 502 503 static SENSOR_DEVICE_ATTR_RO(fan1_input, fan_input, 0); 504 static SENSOR_DEVICE_ATTR_RO(fan2_input, fan_input, 1); 505 static SENSOR_DEVICE_ATTR_RW(fan1_min, fan_min, 0); 506 static SENSOR_DEVICE_ATTR_RW(fan2_min, fan_min, 1); 507 static SENSOR_DEVICE_ATTR_RW(fan1_div, fan_div, 0); 508 static SENSOR_DEVICE_ATTR_RW(fan2_div, fan_div, 1); 509 static DEVICE_ATTR_RW(fan1_off); 510 511 #define TEMP_FROM_REG(val) (((val) - 130) * 1000) 512 #define TEMP_CLAMP(val) clamp_val(val, -130000, 125000) 513 #define TEMP_TO_REG(val) (DIV_ROUND_CLOSEST(TEMP_CLAMP(val), 1000) + 130) 514 515 static ssize_t temp_input_show(struct device *dev, 516 struct device_attribute *attr, char *buf) 517 { 518 int n = to_sensor_dev_attr(attr)->index; 519 struct gl520_data *data = gl520_update_device(dev); 520 521 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_input[n])); 522 } 523 524 static ssize_t temp_max_show(struct device *dev, 525 struct device_attribute *attr, char *buf) 526 { 527 int n = to_sensor_dev_attr(attr)->index; 528 struct gl520_data *data = gl520_update_device(dev); 529 530 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max[n])); 531 } 532 533 static ssize_t temp_max_hyst_show(struct device *dev, 534 struct device_attribute *attr, char *buf) 535 { 536 int n = to_sensor_dev_attr(attr)->index; 537 struct gl520_data *data = gl520_update_device(dev); 538 539 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max_hyst[n])); 540 } 541 542 static ssize_t temp_max_store(struct device *dev, 543 struct device_attribute *attr, const char *buf, 544 size_t count) 545 { 546 struct gl520_data *data = dev_get_drvdata(dev); 547 struct i2c_client *client = data->client; 548 int n = to_sensor_dev_attr(attr)->index; 549 long v; 550 int err; 551 552 err = kstrtol(buf, 10, &v); 553 if (err) 554 return err; 555 556 mutex_lock(&data->update_lock); 557 data->temp_max[n] = TEMP_TO_REG(v); 558 gl520_write_value(client, GL520_REG_TEMP_MAX[n], data->temp_max[n]); 559 mutex_unlock(&data->update_lock); 560 return count; 561 } 562 563 static ssize_t temp_max_hyst_store(struct device *dev, 564 struct device_attribute *attr, 565 const char *buf, size_t count) 566 { 567 struct gl520_data *data = dev_get_drvdata(dev); 568 struct i2c_client *client = data->client; 569 int n = to_sensor_dev_attr(attr)->index; 570 long v; 571 int err; 572 573 err = kstrtol(buf, 10, &v); 574 if (err) 575 return err; 576 577 mutex_lock(&data->update_lock); 578 data->temp_max_hyst[n] = TEMP_TO_REG(v); 579 gl520_write_value(client, GL520_REG_TEMP_MAX_HYST[n], 580 data->temp_max_hyst[n]); 581 mutex_unlock(&data->update_lock); 582 return count; 583 } 584 585 static SENSOR_DEVICE_ATTR_RO(temp1_input, temp_input, 0); 586 static SENSOR_DEVICE_ATTR_RO(temp2_input, temp_input, 1); 587 static SENSOR_DEVICE_ATTR_RW(temp1_max, temp_max, 0); 588 static SENSOR_DEVICE_ATTR_RW(temp2_max, temp_max, 1); 589 static SENSOR_DEVICE_ATTR_RW(temp1_max_hyst, temp_max_hyst, 0); 590 static SENSOR_DEVICE_ATTR_RW(temp2_max_hyst, temp_max_hyst, 1); 591 592 static ssize_t alarms_show(struct device *dev, struct device_attribute *attr, 593 char *buf) 594 { 595 struct gl520_data *data = gl520_update_device(dev); 596 return sprintf(buf, "%d\n", data->alarms); 597 } 598 599 static ssize_t beep_enable_show(struct device *dev, 600 struct device_attribute *attr, char *buf) 601 { 602 struct gl520_data *data = gl520_update_device(dev); 603 return sprintf(buf, "%d\n", data->beep_enable); 604 } 605 606 static ssize_t beep_mask_show(struct device *dev, 607 struct device_attribute *attr, char *buf) 608 { 609 struct gl520_data *data = gl520_update_device(dev); 610 return sprintf(buf, "%d\n", data->beep_mask); 611 } 612 613 static ssize_t beep_enable_store(struct device *dev, 614 struct device_attribute *attr, 615 const char *buf, size_t count) 616 { 617 struct gl520_data *data = dev_get_drvdata(dev); 618 struct i2c_client *client = data->client; 619 u8 r; 620 unsigned long v; 621 int err; 622 623 err = kstrtoul(buf, 10, &v); 624 if (err) 625 return err; 626 627 r = (v ? 0 : 1); 628 629 mutex_lock(&data->update_lock); 630 data->beep_enable = !r; 631 gl520_write_value(client, GL520_REG_BEEP_ENABLE, 632 (gl520_read_value(client, GL520_REG_BEEP_ENABLE) 633 & ~0x04) | (r << 2)); 634 mutex_unlock(&data->update_lock); 635 return count; 636 } 637 638 static ssize_t beep_mask_store(struct device *dev, 639 struct device_attribute *attr, const char *buf, 640 size_t count) 641 { 642 struct gl520_data *data = dev_get_drvdata(dev); 643 struct i2c_client *client = data->client; 644 unsigned long r; 645 int err; 646 647 err = kstrtoul(buf, 10, &r); 648 if (err) 649 return err; 650 651 mutex_lock(&data->update_lock); 652 r &= data->alarm_mask; 653 data->beep_mask = r; 654 gl520_write_value(client, GL520_REG_BEEP_MASK, r); 655 mutex_unlock(&data->update_lock); 656 return count; 657 } 658 659 static DEVICE_ATTR_RO(alarms); 660 static DEVICE_ATTR_RW(beep_enable); 661 static DEVICE_ATTR_RW(beep_mask); 662 663 static ssize_t alarm_show(struct device *dev, struct device_attribute *attr, 664 char *buf) 665 { 666 int bit_nr = to_sensor_dev_attr(attr)->index; 667 struct gl520_data *data = gl520_update_device(dev); 668 669 return sprintf(buf, "%d\n", (data->alarms >> bit_nr) & 1); 670 } 671 672 static SENSOR_DEVICE_ATTR_RO(in0_alarm, alarm, 0); 673 static SENSOR_DEVICE_ATTR_RO(in1_alarm, alarm, 1); 674 static SENSOR_DEVICE_ATTR_RO(in2_alarm, alarm, 2); 675 static SENSOR_DEVICE_ATTR_RO(in3_alarm, alarm, 3); 676 static SENSOR_DEVICE_ATTR_RO(temp1_alarm, alarm, 4); 677 static SENSOR_DEVICE_ATTR_RO(fan1_alarm, alarm, 5); 678 static SENSOR_DEVICE_ATTR_RO(fan2_alarm, alarm, 6); 679 static SENSOR_DEVICE_ATTR_RO(temp2_alarm, alarm, 7); 680 static SENSOR_DEVICE_ATTR_RO(in4_alarm, alarm, 7); 681 682 static ssize_t beep_show(struct device *dev, struct device_attribute *attr, 683 char *buf) 684 { 685 int bitnr = to_sensor_dev_attr(attr)->index; 686 struct gl520_data *data = gl520_update_device(dev); 687 688 return sprintf(buf, "%d\n", (data->beep_mask >> bitnr) & 1); 689 } 690 691 static ssize_t beep_store(struct device *dev, struct device_attribute *attr, 692 const char *buf, size_t count) 693 { 694 struct gl520_data *data = dev_get_drvdata(dev); 695 struct i2c_client *client = data->client; 696 int bitnr = to_sensor_dev_attr(attr)->index; 697 unsigned long bit; 698 699 int err; 700 701 err = kstrtoul(buf, 10, &bit); 702 if (err) 703 return err; 704 if (bit & ~1) 705 return -EINVAL; 706 707 mutex_lock(&data->update_lock); 708 data->beep_mask = gl520_read_value(client, GL520_REG_BEEP_MASK); 709 if (bit) 710 data->beep_mask |= (1 << bitnr); 711 else 712 data->beep_mask &= ~(1 << bitnr); 713 gl520_write_value(client, GL520_REG_BEEP_MASK, data->beep_mask); 714 mutex_unlock(&data->update_lock); 715 return count; 716 } 717 718 static SENSOR_DEVICE_ATTR_RW(in0_beep, beep, 0); 719 static SENSOR_DEVICE_ATTR_RW(in1_beep, beep, 1); 720 static SENSOR_DEVICE_ATTR_RW(in2_beep, beep, 2); 721 static SENSOR_DEVICE_ATTR_RW(in3_beep, beep, 3); 722 static SENSOR_DEVICE_ATTR_RW(temp1_beep, beep, 4); 723 static SENSOR_DEVICE_ATTR_RW(fan1_beep, beep, 5); 724 static SENSOR_DEVICE_ATTR_RW(fan2_beep, beep, 6); 725 static SENSOR_DEVICE_ATTR_RW(temp2_beep, beep, 7); 726 static SENSOR_DEVICE_ATTR_RW(in4_beep, beep, 7); 727 728 static struct attribute *gl520_attributes[] = { 729 &dev_attr_cpu0_vid.attr, 730 731 &sensor_dev_attr_in0_input.dev_attr.attr, 732 &sensor_dev_attr_in0_min.dev_attr.attr, 733 &sensor_dev_attr_in0_max.dev_attr.attr, 734 &sensor_dev_attr_in0_alarm.dev_attr.attr, 735 &sensor_dev_attr_in0_beep.dev_attr.attr, 736 &sensor_dev_attr_in1_input.dev_attr.attr, 737 &sensor_dev_attr_in1_min.dev_attr.attr, 738 &sensor_dev_attr_in1_max.dev_attr.attr, 739 &sensor_dev_attr_in1_alarm.dev_attr.attr, 740 &sensor_dev_attr_in1_beep.dev_attr.attr, 741 &sensor_dev_attr_in2_input.dev_attr.attr, 742 &sensor_dev_attr_in2_min.dev_attr.attr, 743 &sensor_dev_attr_in2_max.dev_attr.attr, 744 &sensor_dev_attr_in2_alarm.dev_attr.attr, 745 &sensor_dev_attr_in2_beep.dev_attr.attr, 746 &sensor_dev_attr_in3_input.dev_attr.attr, 747 &sensor_dev_attr_in3_min.dev_attr.attr, 748 &sensor_dev_attr_in3_max.dev_attr.attr, 749 &sensor_dev_attr_in3_alarm.dev_attr.attr, 750 &sensor_dev_attr_in3_beep.dev_attr.attr, 751 752 &sensor_dev_attr_fan1_input.dev_attr.attr, 753 &sensor_dev_attr_fan1_min.dev_attr.attr, 754 &sensor_dev_attr_fan1_div.dev_attr.attr, 755 &sensor_dev_attr_fan1_alarm.dev_attr.attr, 756 &sensor_dev_attr_fan1_beep.dev_attr.attr, 757 &dev_attr_fan1_off.attr, 758 &sensor_dev_attr_fan2_input.dev_attr.attr, 759 &sensor_dev_attr_fan2_min.dev_attr.attr, 760 &sensor_dev_attr_fan2_div.dev_attr.attr, 761 &sensor_dev_attr_fan2_alarm.dev_attr.attr, 762 &sensor_dev_attr_fan2_beep.dev_attr.attr, 763 764 &sensor_dev_attr_temp1_input.dev_attr.attr, 765 &sensor_dev_attr_temp1_max.dev_attr.attr, 766 &sensor_dev_attr_temp1_max_hyst.dev_attr.attr, 767 &sensor_dev_attr_temp1_alarm.dev_attr.attr, 768 &sensor_dev_attr_temp1_beep.dev_attr.attr, 769 770 &dev_attr_alarms.attr, 771 &dev_attr_beep_enable.attr, 772 &dev_attr_beep_mask.attr, 773 NULL 774 }; 775 776 static const struct attribute_group gl520_group = { 777 .attrs = gl520_attributes, 778 }; 779 780 static struct attribute *gl520_attributes_in4[] = { 781 &sensor_dev_attr_in4_input.dev_attr.attr, 782 &sensor_dev_attr_in4_min.dev_attr.attr, 783 &sensor_dev_attr_in4_max.dev_attr.attr, 784 &sensor_dev_attr_in4_alarm.dev_attr.attr, 785 &sensor_dev_attr_in4_beep.dev_attr.attr, 786 NULL 787 }; 788 789 static struct attribute *gl520_attributes_temp2[] = { 790 &sensor_dev_attr_temp2_input.dev_attr.attr, 791 &sensor_dev_attr_temp2_max.dev_attr.attr, 792 &sensor_dev_attr_temp2_max_hyst.dev_attr.attr, 793 &sensor_dev_attr_temp2_alarm.dev_attr.attr, 794 &sensor_dev_attr_temp2_beep.dev_attr.attr, 795 NULL 796 }; 797 798 static const struct attribute_group gl520_group_in4 = { 799 .attrs = gl520_attributes_in4, 800 }; 801 802 static const struct attribute_group gl520_group_temp2 = { 803 .attrs = gl520_attributes_temp2, 804 }; 805 806 807 /* 808 * Real code 809 */ 810 811 /* Return 0 if detection is successful, -ENODEV otherwise */ 812 static int gl520_detect(struct i2c_client *client, struct i2c_board_info *info) 813 { 814 struct i2c_adapter *adapter = client->adapter; 815 816 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA | 817 I2C_FUNC_SMBUS_WORD_DATA)) 818 return -ENODEV; 819 820 /* Determine the chip type. */ 821 if ((gl520_read_value(client, GL520_REG_CHIP_ID) != 0x20) || 822 ((gl520_read_value(client, GL520_REG_REVISION) & 0x7f) != 0x00) || 823 ((gl520_read_value(client, GL520_REG_CONF) & 0x80) != 0x00)) { 824 dev_dbg(&client->dev, "Unknown chip type, skipping\n"); 825 return -ENODEV; 826 } 827 828 strlcpy(info->type, "gl520sm", I2C_NAME_SIZE); 829 830 return 0; 831 } 832 833 /* Called when we have found a new GL520SM. */ 834 static void gl520_init_client(struct i2c_client *client) 835 { 836 struct gl520_data *data = i2c_get_clientdata(client); 837 u8 oldconf, conf; 838 839 conf = oldconf = gl520_read_value(client, GL520_REG_CONF); 840 841 data->alarm_mask = 0xff; 842 data->vrm = vid_which_vrm(); 843 844 if (extra_sensor_type == 1) 845 conf &= ~0x10; 846 else if (extra_sensor_type == 2) 847 conf |= 0x10; 848 data->two_temps = !(conf & 0x10); 849 850 /* If IRQ# is disabled, we can safely force comparator mode */ 851 if (!(conf & 0x20)) 852 conf &= 0xf7; 853 854 /* Enable monitoring if needed */ 855 conf |= 0x40; 856 857 if (conf != oldconf) 858 gl520_write_value(client, GL520_REG_CONF, conf); 859 860 gl520_update_device(&(client->dev)); 861 862 if (data->fan_min[0] == 0) 863 data->alarm_mask &= ~0x20; 864 if (data->fan_min[1] == 0) 865 data->alarm_mask &= ~0x40; 866 867 data->beep_mask &= data->alarm_mask; 868 gl520_write_value(client, GL520_REG_BEEP_MASK, data->beep_mask); 869 } 870 871 static int gl520_probe(struct i2c_client *client, 872 const struct i2c_device_id *id) 873 { 874 struct device *dev = &client->dev; 875 struct device *hwmon_dev; 876 struct gl520_data *data; 877 878 data = devm_kzalloc(dev, sizeof(struct gl520_data), GFP_KERNEL); 879 if (!data) 880 return -ENOMEM; 881 882 i2c_set_clientdata(client, data); 883 mutex_init(&data->update_lock); 884 data->client = client; 885 886 /* Initialize the GL520SM chip */ 887 gl520_init_client(client); 888 889 /* sysfs hooks */ 890 data->groups[0] = &gl520_group; 891 892 if (data->two_temps) 893 data->groups[1] = &gl520_group_temp2; 894 else 895 data->groups[1] = &gl520_group_in4; 896 897 hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name, 898 data, data->groups); 899 return PTR_ERR_OR_ZERO(hwmon_dev); 900 } 901 902 static const struct i2c_device_id gl520_id[] = { 903 { "gl520sm", 0 }, 904 { } 905 }; 906 MODULE_DEVICE_TABLE(i2c, gl520_id); 907 908 static struct i2c_driver gl520_driver = { 909 .class = I2C_CLASS_HWMON, 910 .driver = { 911 .name = "gl520sm", 912 }, 913 .probe = gl520_probe, 914 .id_table = gl520_id, 915 .detect = gl520_detect, 916 .address_list = normal_i2c, 917 }; 918 919 module_i2c_driver(gl520_driver); 920 921 MODULE_AUTHOR("Frodo Looijaard <frodol@dds.nl>, " 922 "Kyösti Mälkki <kmalkki@cc.hut.fi>, " 923 "Maarten Deprez <maartendeprez@users.sourceforge.net>"); 924 MODULE_DESCRIPTION("GL520SM driver"); 925 MODULE_LICENSE("GPL"); 926