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 get_in_input(struct device *dev, struct device_attribute *attr, 220 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 get_in_min(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 get_in_max(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 set_in_min(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 set_in_max(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(in0_input, S_IRUGO, get_in_input, NULL, 0); 327 static SENSOR_DEVICE_ATTR(in1_input, S_IRUGO, get_in_input, NULL, 1); 328 static SENSOR_DEVICE_ATTR(in2_input, S_IRUGO, get_in_input, NULL, 2); 329 static SENSOR_DEVICE_ATTR(in3_input, S_IRUGO, get_in_input, NULL, 3); 330 static SENSOR_DEVICE_ATTR(in4_input, S_IRUGO, get_in_input, NULL, 4); 331 static SENSOR_DEVICE_ATTR(in0_min, S_IRUGO | S_IWUSR, 332 get_in_min, set_in_min, 0); 333 static SENSOR_DEVICE_ATTR(in1_min, S_IRUGO | S_IWUSR, 334 get_in_min, set_in_min, 1); 335 static SENSOR_DEVICE_ATTR(in2_min, S_IRUGO | S_IWUSR, 336 get_in_min, set_in_min, 2); 337 static SENSOR_DEVICE_ATTR(in3_min, S_IRUGO | S_IWUSR, 338 get_in_min, set_in_min, 3); 339 static SENSOR_DEVICE_ATTR(in4_min, S_IRUGO | S_IWUSR, 340 get_in_min, set_in_min, 4); 341 static SENSOR_DEVICE_ATTR(in0_max, S_IRUGO | S_IWUSR, 342 get_in_max, set_in_max, 0); 343 static SENSOR_DEVICE_ATTR(in1_max, S_IRUGO | S_IWUSR, 344 get_in_max, set_in_max, 1); 345 static SENSOR_DEVICE_ATTR(in2_max, S_IRUGO | S_IWUSR, 346 get_in_max, set_in_max, 2); 347 static SENSOR_DEVICE_ATTR(in3_max, S_IRUGO | S_IWUSR, 348 get_in_max, set_in_max, 3); 349 static SENSOR_DEVICE_ATTR(in4_max, S_IRUGO | S_IWUSR, 350 get_in_max, set_in_max, 4); 351 352 #define DIV_FROM_REG(val) (1 << (val)) 353 #define FAN_FROM_REG(val, div) ((val) == 0 ? 0 : (480000 / ((val) << (div)))) 354 355 #define FAN_BASE(div) (480000 >> (div)) 356 #define FAN_CLAMP(val, div) clamp_val(val, FAN_BASE(div) / 255, \ 357 FAN_BASE(div)) 358 #define FAN_TO_REG(val, div) ((val) == 0 ? 0 : \ 359 DIV_ROUND_CLOSEST(480000, \ 360 FAN_CLAMP(val, div) << (div))) 361 362 static ssize_t get_fan_input(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_input[n], 369 data->fan_div[n])); 370 } 371 372 static ssize_t get_fan_min(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", FAN_FROM_REG(data->fan_min[n], 379 data->fan_div[n])); 380 } 381 382 static ssize_t get_fan_div(struct device *dev, struct device_attribute *attr, 383 char *buf) 384 { 385 int n = to_sensor_dev_attr(attr)->index; 386 struct gl520_data *data = gl520_update_device(dev); 387 388 return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[n])); 389 } 390 391 static ssize_t fan1_off_show(struct device *dev, 392 struct device_attribute *attr, char *buf) 393 { 394 struct gl520_data *data = gl520_update_device(dev); 395 return sprintf(buf, "%d\n", data->fan_off); 396 } 397 398 static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr, 399 const char *buf, size_t count) 400 { 401 struct gl520_data *data = dev_get_drvdata(dev); 402 struct i2c_client *client = data->client; 403 int n = to_sensor_dev_attr(attr)->index; 404 u8 r; 405 unsigned long v; 406 int err; 407 408 err = kstrtoul(buf, 10, &v); 409 if (err) 410 return err; 411 412 mutex_lock(&data->update_lock); 413 r = FAN_TO_REG(v, data->fan_div[n]); 414 data->fan_min[n] = r; 415 416 if (n == 0) 417 gl520_write_value(client, GL520_REG_FAN_MIN, 418 (gl520_read_value(client, GL520_REG_FAN_MIN) 419 & ~0xff00) | (r << 8)); 420 else 421 gl520_write_value(client, GL520_REG_FAN_MIN, 422 (gl520_read_value(client, GL520_REG_FAN_MIN) 423 & ~0xff) | r); 424 425 data->beep_mask = gl520_read_value(client, GL520_REG_BEEP_MASK); 426 if (data->fan_min[n] == 0) 427 data->alarm_mask &= (n == 0) ? ~0x20 : ~0x40; 428 else 429 data->alarm_mask |= (n == 0) ? 0x20 : 0x40; 430 data->beep_mask &= data->alarm_mask; 431 gl520_write_value(client, GL520_REG_BEEP_MASK, data->beep_mask); 432 433 mutex_unlock(&data->update_lock); 434 return count; 435 } 436 437 static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr, 438 const char *buf, size_t count) 439 { 440 struct gl520_data *data = dev_get_drvdata(dev); 441 struct i2c_client *client = data->client; 442 int n = to_sensor_dev_attr(attr)->index; 443 u8 r; 444 unsigned long v; 445 int err; 446 447 err = kstrtoul(buf, 10, &v); 448 if (err) 449 return err; 450 451 switch (v) { 452 case 1: 453 r = 0; 454 break; 455 case 2: 456 r = 1; 457 break; 458 case 4: 459 r = 2; 460 break; 461 case 8: 462 r = 3; 463 break; 464 default: 465 dev_err(&client->dev, 466 "fan_div value %ld not supported. Choose one of 1, 2, 4 or 8!\n", v); 467 return -EINVAL; 468 } 469 470 mutex_lock(&data->update_lock); 471 data->fan_div[n] = r; 472 473 if (n == 0) 474 gl520_write_value(client, GL520_REG_FAN_DIV, 475 (gl520_read_value(client, GL520_REG_FAN_DIV) 476 & ~0xc0) | (r << 6)); 477 else 478 gl520_write_value(client, GL520_REG_FAN_DIV, 479 (gl520_read_value(client, GL520_REG_FAN_DIV) 480 & ~0x30) | (r << 4)); 481 482 mutex_unlock(&data->update_lock); 483 return count; 484 } 485 486 static ssize_t fan1_off_store(struct device *dev, 487 struct device_attribute *attr, const char *buf, 488 size_t count) 489 { 490 struct gl520_data *data = dev_get_drvdata(dev); 491 struct i2c_client *client = data->client; 492 u8 r; 493 unsigned long v; 494 int err; 495 496 err = kstrtoul(buf, 10, &v); 497 if (err) 498 return err; 499 500 r = (v ? 1 : 0); 501 502 mutex_lock(&data->update_lock); 503 data->fan_off = r; 504 gl520_write_value(client, GL520_REG_FAN_OFF, 505 (gl520_read_value(client, GL520_REG_FAN_OFF) 506 & ~0x0c) | (r << 2)); 507 mutex_unlock(&data->update_lock); 508 return count; 509 } 510 511 static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, get_fan_input, NULL, 0); 512 static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, get_fan_input, NULL, 1); 513 static SENSOR_DEVICE_ATTR(fan1_min, S_IRUGO | S_IWUSR, 514 get_fan_min, set_fan_min, 0); 515 static SENSOR_DEVICE_ATTR(fan2_min, S_IRUGO | S_IWUSR, 516 get_fan_min, set_fan_min, 1); 517 static SENSOR_DEVICE_ATTR(fan1_div, S_IRUGO | S_IWUSR, 518 get_fan_div, set_fan_div, 0); 519 static SENSOR_DEVICE_ATTR(fan2_div, S_IRUGO | S_IWUSR, 520 get_fan_div, set_fan_div, 1); 521 static DEVICE_ATTR_RW(fan1_off); 522 523 #define TEMP_FROM_REG(val) (((val) - 130) * 1000) 524 #define TEMP_CLAMP(val) clamp_val(val, -130000, 125000) 525 #define TEMP_TO_REG(val) (DIV_ROUND_CLOSEST(TEMP_CLAMP(val), 1000) + 130) 526 527 static ssize_t get_temp_input(struct device *dev, struct device_attribute *attr, 528 char *buf) 529 { 530 int n = to_sensor_dev_attr(attr)->index; 531 struct gl520_data *data = gl520_update_device(dev); 532 533 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_input[n])); 534 } 535 536 static ssize_t get_temp_max(struct device *dev, struct device_attribute *attr, 537 char *buf) 538 { 539 int n = to_sensor_dev_attr(attr)->index; 540 struct gl520_data *data = gl520_update_device(dev); 541 542 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max[n])); 543 } 544 545 static ssize_t get_temp_max_hyst(struct device *dev, 546 struct device_attribute *attr, char *buf) 547 { 548 int n = to_sensor_dev_attr(attr)->index; 549 struct gl520_data *data = gl520_update_device(dev); 550 551 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max_hyst[n])); 552 } 553 554 static ssize_t set_temp_max(struct device *dev, struct device_attribute *attr, 555 const char *buf, size_t count) 556 { 557 struct gl520_data *data = dev_get_drvdata(dev); 558 struct i2c_client *client = data->client; 559 int n = to_sensor_dev_attr(attr)->index; 560 long v; 561 int err; 562 563 err = kstrtol(buf, 10, &v); 564 if (err) 565 return err; 566 567 mutex_lock(&data->update_lock); 568 data->temp_max[n] = TEMP_TO_REG(v); 569 gl520_write_value(client, GL520_REG_TEMP_MAX[n], data->temp_max[n]); 570 mutex_unlock(&data->update_lock); 571 return count; 572 } 573 574 static ssize_t set_temp_max_hyst(struct device *dev, struct device_attribute 575 *attr, const char *buf, size_t count) 576 { 577 struct gl520_data *data = dev_get_drvdata(dev); 578 struct i2c_client *client = data->client; 579 int n = to_sensor_dev_attr(attr)->index; 580 long v; 581 int err; 582 583 err = kstrtol(buf, 10, &v); 584 if (err) 585 return err; 586 587 mutex_lock(&data->update_lock); 588 data->temp_max_hyst[n] = TEMP_TO_REG(v); 589 gl520_write_value(client, GL520_REG_TEMP_MAX_HYST[n], 590 data->temp_max_hyst[n]); 591 mutex_unlock(&data->update_lock); 592 return count; 593 } 594 595 static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, get_temp_input, NULL, 0); 596 static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, get_temp_input, NULL, 1); 597 static SENSOR_DEVICE_ATTR(temp1_max, S_IRUGO | S_IWUSR, 598 get_temp_max, set_temp_max, 0); 599 static SENSOR_DEVICE_ATTR(temp2_max, S_IRUGO | S_IWUSR, 600 get_temp_max, set_temp_max, 1); 601 static SENSOR_DEVICE_ATTR(temp1_max_hyst, S_IRUGO | S_IWUSR, 602 get_temp_max_hyst, set_temp_max_hyst, 0); 603 static SENSOR_DEVICE_ATTR(temp2_max_hyst, S_IRUGO | S_IWUSR, 604 get_temp_max_hyst, set_temp_max_hyst, 1); 605 606 static ssize_t alarms_show(struct device *dev, struct device_attribute *attr, 607 char *buf) 608 { 609 struct gl520_data *data = gl520_update_device(dev); 610 return sprintf(buf, "%d\n", data->alarms); 611 } 612 613 static ssize_t beep_enable_show(struct device *dev, 614 struct device_attribute *attr, char *buf) 615 { 616 struct gl520_data *data = gl520_update_device(dev); 617 return sprintf(buf, "%d\n", data->beep_enable); 618 } 619 620 static ssize_t beep_mask_show(struct device *dev, 621 struct device_attribute *attr, char *buf) 622 { 623 struct gl520_data *data = gl520_update_device(dev); 624 return sprintf(buf, "%d\n", data->beep_mask); 625 } 626 627 static ssize_t beep_enable_store(struct device *dev, 628 struct device_attribute *attr, 629 const char *buf, size_t count) 630 { 631 struct gl520_data *data = dev_get_drvdata(dev); 632 struct i2c_client *client = data->client; 633 u8 r; 634 unsigned long v; 635 int err; 636 637 err = kstrtoul(buf, 10, &v); 638 if (err) 639 return err; 640 641 r = (v ? 0 : 1); 642 643 mutex_lock(&data->update_lock); 644 data->beep_enable = !r; 645 gl520_write_value(client, GL520_REG_BEEP_ENABLE, 646 (gl520_read_value(client, GL520_REG_BEEP_ENABLE) 647 & ~0x04) | (r << 2)); 648 mutex_unlock(&data->update_lock); 649 return count; 650 } 651 652 static ssize_t beep_mask_store(struct device *dev, 653 struct device_attribute *attr, const char *buf, 654 size_t count) 655 { 656 struct gl520_data *data = dev_get_drvdata(dev); 657 struct i2c_client *client = data->client; 658 unsigned long r; 659 int err; 660 661 err = kstrtoul(buf, 10, &r); 662 if (err) 663 return err; 664 665 mutex_lock(&data->update_lock); 666 r &= data->alarm_mask; 667 data->beep_mask = r; 668 gl520_write_value(client, GL520_REG_BEEP_MASK, r); 669 mutex_unlock(&data->update_lock); 670 return count; 671 } 672 673 static DEVICE_ATTR_RO(alarms); 674 static DEVICE_ATTR_RW(beep_enable); 675 static DEVICE_ATTR_RW(beep_mask); 676 677 static ssize_t get_alarm(struct device *dev, struct device_attribute *attr, 678 char *buf) 679 { 680 int bit_nr = to_sensor_dev_attr(attr)->index; 681 struct gl520_data *data = gl520_update_device(dev); 682 683 return sprintf(buf, "%d\n", (data->alarms >> bit_nr) & 1); 684 } 685 686 static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, get_alarm, NULL, 0); 687 static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, get_alarm, NULL, 1); 688 static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, get_alarm, NULL, 2); 689 static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, get_alarm, NULL, 3); 690 static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, get_alarm, NULL, 4); 691 static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, get_alarm, NULL, 5); 692 static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, get_alarm, NULL, 6); 693 static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, get_alarm, NULL, 7); 694 static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, get_alarm, NULL, 7); 695 696 static ssize_t get_beep(struct device *dev, struct device_attribute *attr, 697 char *buf) 698 { 699 int bitnr = to_sensor_dev_attr(attr)->index; 700 struct gl520_data *data = gl520_update_device(dev); 701 702 return sprintf(buf, "%d\n", (data->beep_mask >> bitnr) & 1); 703 } 704 705 static ssize_t set_beep(struct device *dev, struct device_attribute *attr, 706 const char *buf, size_t count) 707 { 708 struct gl520_data *data = dev_get_drvdata(dev); 709 struct i2c_client *client = data->client; 710 int bitnr = to_sensor_dev_attr(attr)->index; 711 unsigned long bit; 712 713 int err; 714 715 err = kstrtoul(buf, 10, &bit); 716 if (err) 717 return err; 718 if (bit & ~1) 719 return -EINVAL; 720 721 mutex_lock(&data->update_lock); 722 data->beep_mask = gl520_read_value(client, GL520_REG_BEEP_MASK); 723 if (bit) 724 data->beep_mask |= (1 << bitnr); 725 else 726 data->beep_mask &= ~(1 << bitnr); 727 gl520_write_value(client, GL520_REG_BEEP_MASK, data->beep_mask); 728 mutex_unlock(&data->update_lock); 729 return count; 730 } 731 732 static SENSOR_DEVICE_ATTR(in0_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 0); 733 static SENSOR_DEVICE_ATTR(in1_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 1); 734 static SENSOR_DEVICE_ATTR(in2_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 2); 735 static SENSOR_DEVICE_ATTR(in3_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 3); 736 static SENSOR_DEVICE_ATTR(temp1_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 4); 737 static SENSOR_DEVICE_ATTR(fan1_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 5); 738 static SENSOR_DEVICE_ATTR(fan2_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 6); 739 static SENSOR_DEVICE_ATTR(temp2_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 7); 740 static SENSOR_DEVICE_ATTR(in4_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 7); 741 742 static struct attribute *gl520_attributes[] = { 743 &dev_attr_cpu0_vid.attr, 744 745 &sensor_dev_attr_in0_input.dev_attr.attr, 746 &sensor_dev_attr_in0_min.dev_attr.attr, 747 &sensor_dev_attr_in0_max.dev_attr.attr, 748 &sensor_dev_attr_in0_alarm.dev_attr.attr, 749 &sensor_dev_attr_in0_beep.dev_attr.attr, 750 &sensor_dev_attr_in1_input.dev_attr.attr, 751 &sensor_dev_attr_in1_min.dev_attr.attr, 752 &sensor_dev_attr_in1_max.dev_attr.attr, 753 &sensor_dev_attr_in1_alarm.dev_attr.attr, 754 &sensor_dev_attr_in1_beep.dev_attr.attr, 755 &sensor_dev_attr_in2_input.dev_attr.attr, 756 &sensor_dev_attr_in2_min.dev_attr.attr, 757 &sensor_dev_attr_in2_max.dev_attr.attr, 758 &sensor_dev_attr_in2_alarm.dev_attr.attr, 759 &sensor_dev_attr_in2_beep.dev_attr.attr, 760 &sensor_dev_attr_in3_input.dev_attr.attr, 761 &sensor_dev_attr_in3_min.dev_attr.attr, 762 &sensor_dev_attr_in3_max.dev_attr.attr, 763 &sensor_dev_attr_in3_alarm.dev_attr.attr, 764 &sensor_dev_attr_in3_beep.dev_attr.attr, 765 766 &sensor_dev_attr_fan1_input.dev_attr.attr, 767 &sensor_dev_attr_fan1_min.dev_attr.attr, 768 &sensor_dev_attr_fan1_div.dev_attr.attr, 769 &sensor_dev_attr_fan1_alarm.dev_attr.attr, 770 &sensor_dev_attr_fan1_beep.dev_attr.attr, 771 &dev_attr_fan1_off.attr, 772 &sensor_dev_attr_fan2_input.dev_attr.attr, 773 &sensor_dev_attr_fan2_min.dev_attr.attr, 774 &sensor_dev_attr_fan2_div.dev_attr.attr, 775 &sensor_dev_attr_fan2_alarm.dev_attr.attr, 776 &sensor_dev_attr_fan2_beep.dev_attr.attr, 777 778 &sensor_dev_attr_temp1_input.dev_attr.attr, 779 &sensor_dev_attr_temp1_max.dev_attr.attr, 780 &sensor_dev_attr_temp1_max_hyst.dev_attr.attr, 781 &sensor_dev_attr_temp1_alarm.dev_attr.attr, 782 &sensor_dev_attr_temp1_beep.dev_attr.attr, 783 784 &dev_attr_alarms.attr, 785 &dev_attr_beep_enable.attr, 786 &dev_attr_beep_mask.attr, 787 NULL 788 }; 789 790 static const struct attribute_group gl520_group = { 791 .attrs = gl520_attributes, 792 }; 793 794 static struct attribute *gl520_attributes_in4[] = { 795 &sensor_dev_attr_in4_input.dev_attr.attr, 796 &sensor_dev_attr_in4_min.dev_attr.attr, 797 &sensor_dev_attr_in4_max.dev_attr.attr, 798 &sensor_dev_attr_in4_alarm.dev_attr.attr, 799 &sensor_dev_attr_in4_beep.dev_attr.attr, 800 NULL 801 }; 802 803 static struct attribute *gl520_attributes_temp2[] = { 804 &sensor_dev_attr_temp2_input.dev_attr.attr, 805 &sensor_dev_attr_temp2_max.dev_attr.attr, 806 &sensor_dev_attr_temp2_max_hyst.dev_attr.attr, 807 &sensor_dev_attr_temp2_alarm.dev_attr.attr, 808 &sensor_dev_attr_temp2_beep.dev_attr.attr, 809 NULL 810 }; 811 812 static const struct attribute_group gl520_group_in4 = { 813 .attrs = gl520_attributes_in4, 814 }; 815 816 static const struct attribute_group gl520_group_temp2 = { 817 .attrs = gl520_attributes_temp2, 818 }; 819 820 821 /* 822 * Real code 823 */ 824 825 /* Return 0 if detection is successful, -ENODEV otherwise */ 826 static int gl520_detect(struct i2c_client *client, struct i2c_board_info *info) 827 { 828 struct i2c_adapter *adapter = client->adapter; 829 830 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA | 831 I2C_FUNC_SMBUS_WORD_DATA)) 832 return -ENODEV; 833 834 /* Determine the chip type. */ 835 if ((gl520_read_value(client, GL520_REG_CHIP_ID) != 0x20) || 836 ((gl520_read_value(client, GL520_REG_REVISION) & 0x7f) != 0x00) || 837 ((gl520_read_value(client, GL520_REG_CONF) & 0x80) != 0x00)) { 838 dev_dbg(&client->dev, "Unknown chip type, skipping\n"); 839 return -ENODEV; 840 } 841 842 strlcpy(info->type, "gl520sm", I2C_NAME_SIZE); 843 844 return 0; 845 } 846 847 /* Called when we have found a new GL520SM. */ 848 static void gl520_init_client(struct i2c_client *client) 849 { 850 struct gl520_data *data = i2c_get_clientdata(client); 851 u8 oldconf, conf; 852 853 conf = oldconf = gl520_read_value(client, GL520_REG_CONF); 854 855 data->alarm_mask = 0xff; 856 data->vrm = vid_which_vrm(); 857 858 if (extra_sensor_type == 1) 859 conf &= ~0x10; 860 else if (extra_sensor_type == 2) 861 conf |= 0x10; 862 data->two_temps = !(conf & 0x10); 863 864 /* If IRQ# is disabled, we can safely force comparator mode */ 865 if (!(conf & 0x20)) 866 conf &= 0xf7; 867 868 /* Enable monitoring if needed */ 869 conf |= 0x40; 870 871 if (conf != oldconf) 872 gl520_write_value(client, GL520_REG_CONF, conf); 873 874 gl520_update_device(&(client->dev)); 875 876 if (data->fan_min[0] == 0) 877 data->alarm_mask &= ~0x20; 878 if (data->fan_min[1] == 0) 879 data->alarm_mask &= ~0x40; 880 881 data->beep_mask &= data->alarm_mask; 882 gl520_write_value(client, GL520_REG_BEEP_MASK, data->beep_mask); 883 } 884 885 static int gl520_probe(struct i2c_client *client, 886 const struct i2c_device_id *id) 887 { 888 struct device *dev = &client->dev; 889 struct device *hwmon_dev; 890 struct gl520_data *data; 891 892 data = devm_kzalloc(dev, sizeof(struct gl520_data), GFP_KERNEL); 893 if (!data) 894 return -ENOMEM; 895 896 i2c_set_clientdata(client, data); 897 mutex_init(&data->update_lock); 898 data->client = client; 899 900 /* Initialize the GL520SM chip */ 901 gl520_init_client(client); 902 903 /* sysfs hooks */ 904 data->groups[0] = &gl520_group; 905 906 if (data->two_temps) 907 data->groups[1] = &gl520_group_temp2; 908 else 909 data->groups[1] = &gl520_group_in4; 910 911 hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name, 912 data, data->groups); 913 return PTR_ERR_OR_ZERO(hwmon_dev); 914 } 915 916 static const struct i2c_device_id gl520_id[] = { 917 { "gl520sm", 0 }, 918 { } 919 }; 920 MODULE_DEVICE_TABLE(i2c, gl520_id); 921 922 static struct i2c_driver gl520_driver = { 923 .class = I2C_CLASS_HWMON, 924 .driver = { 925 .name = "gl520sm", 926 }, 927 .probe = gl520_probe, 928 .id_table = gl520_id, 929 .detect = gl520_detect, 930 .address_list = normal_i2c, 931 }; 932 933 module_i2c_driver(gl520_driver); 934 935 MODULE_AUTHOR("Frodo Looijaard <frodol@dds.nl>, " 936 "Kyösti Mälkki <kmalkki@cc.hut.fi>, " 937 "Maarten Deprez <maartendeprez@users.sourceforge.net>"); 938 MODULE_DESCRIPTION("GL520SM driver"); 939 MODULE_LICENSE("GPL"); 940