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 /* Insmod parameters */ 45 I2C_CLIENT_INSMOD_1(gl520sm); 46 47 /* Many GL520 constants specified below 48 One of the inputs can be configured as either temp or voltage. 49 That's why _TEMP2 and _IN4 access the same register 50 */ 51 52 /* The GL520 registers */ 53 #define GL520_REG_CHIP_ID 0x00 54 #define GL520_REG_REVISION 0x01 55 #define GL520_REG_CONF 0x03 56 #define GL520_REG_MASK 0x11 57 58 #define GL520_REG_VID_INPUT 0x02 59 60 static const u8 GL520_REG_IN_INPUT[] = { 0x15, 0x14, 0x13, 0x0d, 0x0e }; 61 static const u8 GL520_REG_IN_LIMIT[] = { 0x0c, 0x09, 0x0a, 0x0b }; 62 static const u8 GL520_REG_IN_MIN[] = { 0x0c, 0x09, 0x0a, 0x0b, 0x18 }; 63 static const u8 GL520_REG_IN_MAX[] = { 0x0c, 0x09, 0x0a, 0x0b, 0x17 }; 64 65 static const u8 GL520_REG_TEMP_INPUT[] = { 0x04, 0x0e }; 66 static const u8 GL520_REG_TEMP_MAX[] = { 0x05, 0x17 }; 67 static const u8 GL520_REG_TEMP_MAX_HYST[] = { 0x06, 0x18 }; 68 69 #define GL520_REG_FAN_INPUT 0x07 70 #define GL520_REG_FAN_MIN 0x08 71 #define GL520_REG_FAN_DIV 0x0f 72 #define GL520_REG_FAN_OFF GL520_REG_FAN_DIV 73 74 #define GL520_REG_ALARMS 0x12 75 #define GL520_REG_BEEP_MASK 0x10 76 #define GL520_REG_BEEP_ENABLE GL520_REG_CONF 77 78 /* 79 * Function declarations 80 */ 81 82 static int gl520_attach_adapter(struct i2c_adapter *adapter); 83 static int gl520_detect(struct i2c_adapter *adapter, int address, int kind); 84 static void gl520_init_client(struct i2c_client *client); 85 static int gl520_detach_client(struct i2c_client *client); 86 static int gl520_read_value(struct i2c_client *client, u8 reg); 87 static int gl520_write_value(struct i2c_client *client, u8 reg, u16 value); 88 static struct gl520_data *gl520_update_device(struct device *dev); 89 90 /* Driver data */ 91 static struct i2c_driver gl520_driver = { 92 .driver = { 93 .name = "gl520sm", 94 }, 95 .attach_adapter = gl520_attach_adapter, 96 .detach_client = gl520_detach_client, 97 }; 98 99 /* Client data */ 100 struct gl520_data { 101 struct i2c_client client; 102 struct device *hwmon_dev; 103 struct mutex update_lock; 104 char valid; /* zero until the following fields are valid */ 105 unsigned long last_updated; /* in jiffies */ 106 107 u8 vid; 108 u8 vrm; 109 u8 in_input[5]; /* [0] = VVD */ 110 u8 in_min[5]; /* [0] = VDD */ 111 u8 in_max[5]; /* [0] = VDD */ 112 u8 fan_input[2]; 113 u8 fan_min[2]; 114 u8 fan_div[2]; 115 u8 fan_off; 116 u8 temp_input[2]; 117 u8 temp_max[2]; 118 u8 temp_max_hyst[2]; 119 u8 alarms; 120 u8 beep_enable; 121 u8 beep_mask; 122 u8 alarm_mask; 123 u8 two_temps; 124 }; 125 126 /* 127 * Sysfs stuff 128 */ 129 130 static ssize_t get_cpu_vid(struct device *dev, struct device_attribute *attr, 131 char *buf) 132 { 133 struct gl520_data *data = gl520_update_device(dev); 134 return sprintf(buf, "%u\n", vid_from_reg(data->vid, data->vrm)); 135 } 136 static DEVICE_ATTR(cpu0_vid, S_IRUGO, get_cpu_vid, NULL); 137 138 #define VDD_FROM_REG(val) (((val)*95+2)/4) 139 #define VDD_TO_REG(val) (SENSORS_LIMIT((((val)*4+47)/95),0,255)) 140 141 #define IN_FROM_REG(val) ((val)*19) 142 #define IN_TO_REG(val) (SENSORS_LIMIT((((val)+9)/19),0,255)) 143 144 static ssize_t get_in_input(struct device *dev, struct device_attribute *attr, 145 char *buf) 146 { 147 int n = to_sensor_dev_attr(attr)->index; 148 struct gl520_data *data = gl520_update_device(dev); 149 u8 r = data->in_input[n]; 150 151 if (n == 0) 152 return sprintf(buf, "%d\n", VDD_FROM_REG(r)); 153 else 154 return sprintf(buf, "%d\n", IN_FROM_REG(r)); 155 } 156 157 static ssize_t get_in_min(struct device *dev, struct device_attribute *attr, 158 char *buf) 159 { 160 int n = to_sensor_dev_attr(attr)->index; 161 struct gl520_data *data = gl520_update_device(dev); 162 u8 r = data->in_min[n]; 163 164 if (n == 0) 165 return sprintf(buf, "%d\n", VDD_FROM_REG(r)); 166 else 167 return sprintf(buf, "%d\n", IN_FROM_REG(r)); 168 } 169 170 static ssize_t get_in_max(struct device *dev, struct device_attribute *attr, 171 char *buf) 172 { 173 int n = to_sensor_dev_attr(attr)->index; 174 struct gl520_data *data = gl520_update_device(dev); 175 u8 r = data->in_max[n]; 176 177 if (n == 0) 178 return sprintf(buf, "%d\n", VDD_FROM_REG(r)); 179 else 180 return sprintf(buf, "%d\n", IN_FROM_REG(r)); 181 } 182 183 static ssize_t set_in_min(struct device *dev, struct device_attribute *attr, 184 const char *buf, size_t count) 185 { 186 struct i2c_client *client = to_i2c_client(dev); 187 struct gl520_data *data = i2c_get_clientdata(client); 188 int n = to_sensor_dev_attr(attr)->index; 189 long v = simple_strtol(buf, NULL, 10); 190 u8 r; 191 192 mutex_lock(&data->update_lock); 193 194 if (n == 0) 195 r = VDD_TO_REG(v); 196 else 197 r = IN_TO_REG(v); 198 199 data->in_min[n] = r; 200 201 if (n < 4) 202 gl520_write_value(client, GL520_REG_IN_MIN[n], 203 (gl520_read_value(client, GL520_REG_IN_MIN[n]) 204 & ~0xff) | r); 205 else 206 gl520_write_value(client, GL520_REG_IN_MIN[n], r); 207 208 mutex_unlock(&data->update_lock); 209 return count; 210 } 211 212 static ssize_t set_in_max(struct device *dev, struct device_attribute *attr, 213 const char *buf, size_t count) 214 { 215 struct i2c_client *client = to_i2c_client(dev); 216 struct gl520_data *data = i2c_get_clientdata(client); 217 int n = to_sensor_dev_attr(attr)->index; 218 long v = simple_strtol(buf, NULL, 10); 219 u8 r; 220 221 if (n == 0) 222 r = VDD_TO_REG(v); 223 else 224 r = IN_TO_REG(v); 225 226 mutex_lock(&data->update_lock); 227 228 data->in_max[n] = r; 229 230 if (n < 4) 231 gl520_write_value(client, GL520_REG_IN_MAX[n], 232 (gl520_read_value(client, GL520_REG_IN_MAX[n]) 233 & ~0xff00) | (r << 8)); 234 else 235 gl520_write_value(client, GL520_REG_IN_MAX[n], r); 236 237 mutex_unlock(&data->update_lock); 238 return count; 239 } 240 241 static SENSOR_DEVICE_ATTR(in0_input, S_IRUGO, get_in_input, NULL, 0); 242 static SENSOR_DEVICE_ATTR(in1_input, S_IRUGO, get_in_input, NULL, 1); 243 static SENSOR_DEVICE_ATTR(in2_input, S_IRUGO, get_in_input, NULL, 2); 244 static SENSOR_DEVICE_ATTR(in3_input, S_IRUGO, get_in_input, NULL, 3); 245 static SENSOR_DEVICE_ATTR(in4_input, S_IRUGO, get_in_input, NULL, 4); 246 static SENSOR_DEVICE_ATTR(in0_min, S_IRUGO | S_IWUSR, 247 get_in_min, set_in_min, 0); 248 static SENSOR_DEVICE_ATTR(in1_min, S_IRUGO | S_IWUSR, 249 get_in_min, set_in_min, 1); 250 static SENSOR_DEVICE_ATTR(in2_min, S_IRUGO | S_IWUSR, 251 get_in_min, set_in_min, 2); 252 static SENSOR_DEVICE_ATTR(in3_min, S_IRUGO | S_IWUSR, 253 get_in_min, set_in_min, 3); 254 static SENSOR_DEVICE_ATTR(in4_min, S_IRUGO | S_IWUSR, 255 get_in_min, set_in_min, 4); 256 static SENSOR_DEVICE_ATTR(in0_max, S_IRUGO | S_IWUSR, 257 get_in_max, set_in_max, 0); 258 static SENSOR_DEVICE_ATTR(in1_max, S_IRUGO | S_IWUSR, 259 get_in_max, set_in_max, 1); 260 static SENSOR_DEVICE_ATTR(in2_max, S_IRUGO | S_IWUSR, 261 get_in_max, set_in_max, 2); 262 static SENSOR_DEVICE_ATTR(in3_max, S_IRUGO | S_IWUSR, 263 get_in_max, set_in_max, 3); 264 static SENSOR_DEVICE_ATTR(in4_max, S_IRUGO | S_IWUSR, 265 get_in_max, set_in_max, 4); 266 267 #define DIV_FROM_REG(val) (1 << (val)) 268 #define FAN_FROM_REG(val,div) ((val)==0 ? 0 : (480000/((val) << (div)))) 269 #define FAN_TO_REG(val,div) ((val)<=0?0:SENSORS_LIMIT((480000 + ((val) << ((div)-1))) / ((val) << (div)), 1, 255)); 270 271 static ssize_t get_fan_input(struct device *dev, struct device_attribute *attr, 272 char *buf) 273 { 274 int n = to_sensor_dev_attr(attr)->index; 275 struct gl520_data *data = gl520_update_device(dev); 276 277 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_input[n], 278 data->fan_div[n])); 279 } 280 281 static ssize_t get_fan_min(struct device *dev, struct device_attribute *attr, 282 char *buf) 283 { 284 int n = to_sensor_dev_attr(attr)->index; 285 struct gl520_data *data = gl520_update_device(dev); 286 287 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[n], 288 data->fan_div[n])); 289 } 290 291 static ssize_t get_fan_div(struct device *dev, struct device_attribute *attr, 292 char *buf) 293 { 294 int n = to_sensor_dev_attr(attr)->index; 295 struct gl520_data *data = gl520_update_device(dev); 296 297 return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[n])); 298 } 299 300 static ssize_t get_fan_off(struct device *dev, struct device_attribute *attr, 301 char *buf) 302 { 303 struct gl520_data *data = gl520_update_device(dev); 304 return sprintf(buf, "%d\n", data->fan_off); 305 } 306 307 static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr, 308 const char *buf, size_t count) 309 { 310 struct i2c_client *client = to_i2c_client(dev); 311 struct gl520_data *data = i2c_get_clientdata(client); 312 int n = to_sensor_dev_attr(attr)->index; 313 unsigned long v = simple_strtoul(buf, NULL, 10); 314 u8 r; 315 316 mutex_lock(&data->update_lock); 317 r = FAN_TO_REG(v, data->fan_div[n]); 318 data->fan_min[n] = r; 319 320 if (n == 0) 321 gl520_write_value(client, GL520_REG_FAN_MIN, 322 (gl520_read_value(client, GL520_REG_FAN_MIN) 323 & ~0xff00) | (r << 8)); 324 else 325 gl520_write_value(client, GL520_REG_FAN_MIN, 326 (gl520_read_value(client, GL520_REG_FAN_MIN) 327 & ~0xff) | r); 328 329 data->beep_mask = gl520_read_value(client, GL520_REG_BEEP_MASK); 330 if (data->fan_min[n] == 0) 331 data->alarm_mask &= (n == 0) ? ~0x20 : ~0x40; 332 else 333 data->alarm_mask |= (n == 0) ? 0x20 : 0x40; 334 data->beep_mask &= data->alarm_mask; 335 gl520_write_value(client, GL520_REG_BEEP_MASK, data->beep_mask); 336 337 mutex_unlock(&data->update_lock); 338 return count; 339 } 340 341 static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr, 342 const char *buf, size_t count) 343 { 344 struct i2c_client *client = to_i2c_client(dev); 345 struct gl520_data *data = i2c_get_clientdata(client); 346 int n = to_sensor_dev_attr(attr)->index; 347 unsigned long v = simple_strtoul(buf, NULL, 10); 348 u8 r; 349 350 switch (v) { 351 case 1: r = 0; break; 352 case 2: r = 1; break; 353 case 4: r = 2; break; 354 case 8: r = 3; break; 355 default: 356 dev_err(&client->dev, "fan_div value %ld not supported. Choose one of 1, 2, 4 or 8!\n", v); 357 return -EINVAL; 358 } 359 360 mutex_lock(&data->update_lock); 361 data->fan_div[n] = r; 362 363 if (n == 0) 364 gl520_write_value(client, GL520_REG_FAN_DIV, 365 (gl520_read_value(client, GL520_REG_FAN_DIV) 366 & ~0xc0) | (r << 6)); 367 else 368 gl520_write_value(client, GL520_REG_FAN_DIV, 369 (gl520_read_value(client, GL520_REG_FAN_DIV) 370 & ~0x30) | (r << 4)); 371 372 mutex_unlock(&data->update_lock); 373 return count; 374 } 375 376 static ssize_t set_fan_off(struct device *dev, struct device_attribute *attr, 377 const char *buf, size_t count) 378 { 379 struct i2c_client *client = to_i2c_client(dev); 380 struct gl520_data *data = i2c_get_clientdata(client); 381 u8 r = simple_strtoul(buf, NULL, 10)?1:0; 382 383 mutex_lock(&data->update_lock); 384 data->fan_off = r; 385 gl520_write_value(client, GL520_REG_FAN_OFF, 386 (gl520_read_value(client, GL520_REG_FAN_OFF) 387 & ~0x0c) | (r << 2)); 388 mutex_unlock(&data->update_lock); 389 return count; 390 } 391 392 static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, get_fan_input, NULL, 0); 393 static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, get_fan_input, NULL, 1); 394 static SENSOR_DEVICE_ATTR(fan1_min, S_IRUGO | S_IWUSR, 395 get_fan_min, set_fan_min, 0); 396 static SENSOR_DEVICE_ATTR(fan2_min, S_IRUGO | S_IWUSR, 397 get_fan_min, set_fan_min, 1); 398 static SENSOR_DEVICE_ATTR(fan1_div, S_IRUGO | S_IWUSR, 399 get_fan_div, set_fan_div, 0); 400 static SENSOR_DEVICE_ATTR(fan2_div, S_IRUGO | S_IWUSR, 401 get_fan_div, set_fan_div, 1); 402 static DEVICE_ATTR(fan1_off, S_IRUGO | S_IWUSR, 403 get_fan_off, set_fan_off); 404 405 #define TEMP_FROM_REG(val) (((val) - 130) * 1000) 406 #define TEMP_TO_REG(val) (SENSORS_LIMIT(((((val)<0?(val)-500:(val)+500) / 1000)+130),0,255)) 407 408 static ssize_t get_temp_input(struct device *dev, struct device_attribute *attr, 409 char *buf) 410 { 411 int n = to_sensor_dev_attr(attr)->index; 412 struct gl520_data *data = gl520_update_device(dev); 413 414 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_input[n])); 415 } 416 417 static ssize_t get_temp_max(struct device *dev, struct device_attribute *attr, 418 char *buf) 419 { 420 int n = to_sensor_dev_attr(attr)->index; 421 struct gl520_data *data = gl520_update_device(dev); 422 423 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max[n])); 424 } 425 426 static ssize_t get_temp_max_hyst(struct device *dev, struct device_attribute 427 *attr, char *buf) 428 { 429 int n = to_sensor_dev_attr(attr)->index; 430 struct gl520_data *data = gl520_update_device(dev); 431 432 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max_hyst[n])); 433 } 434 435 static ssize_t set_temp_max(struct device *dev, struct device_attribute *attr, 436 const char *buf, size_t count) 437 { 438 struct i2c_client *client = to_i2c_client(dev); 439 struct gl520_data *data = i2c_get_clientdata(client); 440 int n = to_sensor_dev_attr(attr)->index; 441 long v = simple_strtol(buf, NULL, 10); 442 443 mutex_lock(&data->update_lock); 444 data->temp_max[n] = TEMP_TO_REG(v); 445 gl520_write_value(client, GL520_REG_TEMP_MAX[n], data->temp_max[n]); 446 mutex_unlock(&data->update_lock); 447 return count; 448 } 449 450 static ssize_t set_temp_max_hyst(struct device *dev, struct device_attribute 451 *attr, const char *buf, size_t count) 452 { 453 struct i2c_client *client = to_i2c_client(dev); 454 struct gl520_data *data = i2c_get_clientdata(client); 455 int n = to_sensor_dev_attr(attr)->index; 456 long v = simple_strtol(buf, NULL, 10); 457 458 mutex_lock(&data->update_lock); 459 data->temp_max_hyst[n] = TEMP_TO_REG(v); 460 gl520_write_value(client, GL520_REG_TEMP_MAX_HYST[n], 461 data->temp_max_hyst[n]); 462 mutex_unlock(&data->update_lock); 463 return count; 464 } 465 466 static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, get_temp_input, NULL, 0); 467 static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, get_temp_input, NULL, 1); 468 static SENSOR_DEVICE_ATTR(temp1_max, S_IRUGO | S_IWUSR, 469 get_temp_max, set_temp_max, 0); 470 static SENSOR_DEVICE_ATTR(temp2_max, S_IRUGO | S_IWUSR, 471 get_temp_max, set_temp_max, 1); 472 static SENSOR_DEVICE_ATTR(temp1_max_hyst, S_IRUGO | S_IWUSR, 473 get_temp_max_hyst, set_temp_max_hyst, 0); 474 static SENSOR_DEVICE_ATTR(temp2_max_hyst, S_IRUGO | S_IWUSR, 475 get_temp_max_hyst, set_temp_max_hyst, 1); 476 477 static ssize_t get_alarms(struct device *dev, struct device_attribute *attr, 478 char *buf) 479 { 480 struct gl520_data *data = gl520_update_device(dev); 481 return sprintf(buf, "%d\n", data->alarms); 482 } 483 484 static ssize_t get_beep_enable(struct device *dev, struct device_attribute 485 *attr, char *buf) 486 { 487 struct gl520_data *data = gl520_update_device(dev); 488 return sprintf(buf, "%d\n", data->beep_enable); 489 } 490 491 static ssize_t get_beep_mask(struct device *dev, struct device_attribute *attr, 492 char *buf) 493 { 494 struct gl520_data *data = gl520_update_device(dev); 495 return sprintf(buf, "%d\n", data->beep_mask); 496 } 497 498 static ssize_t set_beep_enable(struct device *dev, struct device_attribute 499 *attr, const char *buf, size_t count) 500 { 501 struct i2c_client *client = to_i2c_client(dev); 502 struct gl520_data *data = i2c_get_clientdata(client); 503 u8 r = simple_strtoul(buf, NULL, 10)?0:1; 504 505 mutex_lock(&data->update_lock); 506 data->beep_enable = !r; 507 gl520_write_value(client, GL520_REG_BEEP_ENABLE, 508 (gl520_read_value(client, GL520_REG_BEEP_ENABLE) 509 & ~0x04) | (r << 2)); 510 mutex_unlock(&data->update_lock); 511 return count; 512 } 513 514 static ssize_t set_beep_mask(struct device *dev, struct device_attribute *attr, 515 const char *buf, size_t count) 516 { 517 struct i2c_client *client = to_i2c_client(dev); 518 struct gl520_data *data = i2c_get_clientdata(client); 519 u8 r = simple_strtoul(buf, NULL, 10); 520 521 mutex_lock(&data->update_lock); 522 r &= data->alarm_mask; 523 data->beep_mask = r; 524 gl520_write_value(client, GL520_REG_BEEP_MASK, r); 525 mutex_unlock(&data->update_lock); 526 return count; 527 } 528 529 static DEVICE_ATTR(alarms, S_IRUGO, get_alarms, NULL); 530 static DEVICE_ATTR(beep_enable, S_IRUGO | S_IWUSR, 531 get_beep_enable, set_beep_enable); 532 static DEVICE_ATTR(beep_mask, S_IRUGO | S_IWUSR, 533 get_beep_mask, set_beep_mask); 534 535 static ssize_t get_alarm(struct device *dev, struct device_attribute *attr, 536 char *buf) 537 { 538 int bit_nr = to_sensor_dev_attr(attr)->index; 539 struct gl520_data *data = gl520_update_device(dev); 540 541 return sprintf(buf, "%d\n", (data->alarms >> bit_nr) & 1); 542 } 543 544 static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, get_alarm, NULL, 0); 545 static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, get_alarm, NULL, 1); 546 static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, get_alarm, NULL, 2); 547 static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, get_alarm, NULL, 3); 548 static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, get_alarm, NULL, 4); 549 static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, get_alarm, NULL, 5); 550 static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, get_alarm, NULL, 6); 551 static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, get_alarm, NULL, 7); 552 static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, get_alarm, NULL, 7); 553 554 static ssize_t get_beep(struct device *dev, struct device_attribute *attr, 555 char *buf) 556 { 557 int bitnr = to_sensor_dev_attr(attr)->index; 558 struct gl520_data *data = gl520_update_device(dev); 559 560 return sprintf(buf, "%d\n", (data->beep_mask >> bitnr) & 1); 561 } 562 563 static ssize_t set_beep(struct device *dev, struct device_attribute *attr, 564 const char *buf, size_t count) 565 { 566 struct i2c_client *client = to_i2c_client(dev); 567 struct gl520_data *data = i2c_get_clientdata(client); 568 int bitnr = to_sensor_dev_attr(attr)->index; 569 unsigned long bit; 570 571 bit = simple_strtoul(buf, NULL, 10); 572 if (bit & ~1) 573 return -EINVAL; 574 575 mutex_lock(&data->update_lock); 576 data->beep_mask = gl520_read_value(client, GL520_REG_BEEP_MASK); 577 if (bit) 578 data->beep_mask |= (1 << bitnr); 579 else 580 data->beep_mask &= ~(1 << bitnr); 581 gl520_write_value(client, GL520_REG_BEEP_MASK, data->beep_mask); 582 mutex_unlock(&data->update_lock); 583 return count; 584 } 585 586 static SENSOR_DEVICE_ATTR(in0_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 0); 587 static SENSOR_DEVICE_ATTR(in1_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 1); 588 static SENSOR_DEVICE_ATTR(in2_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 2); 589 static SENSOR_DEVICE_ATTR(in3_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 3); 590 static SENSOR_DEVICE_ATTR(temp1_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 4); 591 static SENSOR_DEVICE_ATTR(fan1_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 5); 592 static SENSOR_DEVICE_ATTR(fan2_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 6); 593 static SENSOR_DEVICE_ATTR(temp2_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 7); 594 static SENSOR_DEVICE_ATTR(in4_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 7); 595 596 static struct attribute *gl520_attributes[] = { 597 &dev_attr_cpu0_vid.attr, 598 599 &sensor_dev_attr_in0_input.dev_attr.attr, 600 &sensor_dev_attr_in0_min.dev_attr.attr, 601 &sensor_dev_attr_in0_max.dev_attr.attr, 602 &sensor_dev_attr_in0_alarm.dev_attr.attr, 603 &sensor_dev_attr_in0_beep.dev_attr.attr, 604 &sensor_dev_attr_in1_input.dev_attr.attr, 605 &sensor_dev_attr_in1_min.dev_attr.attr, 606 &sensor_dev_attr_in1_max.dev_attr.attr, 607 &sensor_dev_attr_in1_alarm.dev_attr.attr, 608 &sensor_dev_attr_in1_beep.dev_attr.attr, 609 &sensor_dev_attr_in2_input.dev_attr.attr, 610 &sensor_dev_attr_in2_min.dev_attr.attr, 611 &sensor_dev_attr_in2_max.dev_attr.attr, 612 &sensor_dev_attr_in2_alarm.dev_attr.attr, 613 &sensor_dev_attr_in2_beep.dev_attr.attr, 614 &sensor_dev_attr_in3_input.dev_attr.attr, 615 &sensor_dev_attr_in3_min.dev_attr.attr, 616 &sensor_dev_attr_in3_max.dev_attr.attr, 617 &sensor_dev_attr_in3_alarm.dev_attr.attr, 618 &sensor_dev_attr_in3_beep.dev_attr.attr, 619 620 &sensor_dev_attr_fan1_input.dev_attr.attr, 621 &sensor_dev_attr_fan1_min.dev_attr.attr, 622 &sensor_dev_attr_fan1_div.dev_attr.attr, 623 &sensor_dev_attr_fan1_alarm.dev_attr.attr, 624 &sensor_dev_attr_fan1_beep.dev_attr.attr, 625 &dev_attr_fan1_off.attr, 626 &sensor_dev_attr_fan2_input.dev_attr.attr, 627 &sensor_dev_attr_fan2_min.dev_attr.attr, 628 &sensor_dev_attr_fan2_div.dev_attr.attr, 629 &sensor_dev_attr_fan2_alarm.dev_attr.attr, 630 &sensor_dev_attr_fan2_beep.dev_attr.attr, 631 632 &sensor_dev_attr_temp1_input.dev_attr.attr, 633 &sensor_dev_attr_temp1_max.dev_attr.attr, 634 &sensor_dev_attr_temp1_max_hyst.dev_attr.attr, 635 &sensor_dev_attr_temp1_alarm.dev_attr.attr, 636 &sensor_dev_attr_temp1_beep.dev_attr.attr, 637 638 &dev_attr_alarms.attr, 639 &dev_attr_beep_enable.attr, 640 &dev_attr_beep_mask.attr, 641 NULL 642 }; 643 644 static const struct attribute_group gl520_group = { 645 .attrs = gl520_attributes, 646 }; 647 648 static struct attribute *gl520_attributes_opt[] = { 649 &sensor_dev_attr_in4_input.dev_attr.attr, 650 &sensor_dev_attr_in4_min.dev_attr.attr, 651 &sensor_dev_attr_in4_max.dev_attr.attr, 652 &sensor_dev_attr_in4_alarm.dev_attr.attr, 653 &sensor_dev_attr_in4_beep.dev_attr.attr, 654 655 &sensor_dev_attr_temp2_input.dev_attr.attr, 656 &sensor_dev_attr_temp2_max.dev_attr.attr, 657 &sensor_dev_attr_temp2_max_hyst.dev_attr.attr, 658 &sensor_dev_attr_temp2_alarm.dev_attr.attr, 659 &sensor_dev_attr_temp2_beep.dev_attr.attr, 660 NULL 661 }; 662 663 static const struct attribute_group gl520_group_opt = { 664 .attrs = gl520_attributes_opt, 665 }; 666 667 668 /* 669 * Real code 670 */ 671 672 static int gl520_attach_adapter(struct i2c_adapter *adapter) 673 { 674 if (!(adapter->class & I2C_CLASS_HWMON)) 675 return 0; 676 return i2c_probe(adapter, &addr_data, gl520_detect); 677 } 678 679 static int gl520_detect(struct i2c_adapter *adapter, int address, int kind) 680 { 681 struct i2c_client *client; 682 struct gl520_data *data; 683 int err = 0; 684 685 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA | 686 I2C_FUNC_SMBUS_WORD_DATA)) 687 goto exit; 688 689 /* OK. For now, we presume we have a valid client. We now create the 690 client structure, even though we cannot fill it completely yet. 691 But it allows us to access gl520_{read,write}_value. */ 692 693 if (!(data = kzalloc(sizeof(struct gl520_data), GFP_KERNEL))) { 694 err = -ENOMEM; 695 goto exit; 696 } 697 698 client = &data->client; 699 i2c_set_clientdata(client, data); 700 client->addr = address; 701 client->adapter = adapter; 702 client->driver = &gl520_driver; 703 704 /* Determine the chip type. */ 705 if (kind < 0) { 706 if ((gl520_read_value(client, GL520_REG_CHIP_ID) != 0x20) || 707 ((gl520_read_value(client, GL520_REG_REVISION) & 0x7f) != 0x00) || 708 ((gl520_read_value(client, GL520_REG_CONF) & 0x80) != 0x00)) { 709 dev_dbg(&client->dev, "Unknown chip type, skipping\n"); 710 goto exit_free; 711 } 712 } 713 714 /* Fill in the remaining client fields */ 715 strlcpy(client->name, "gl520sm", I2C_NAME_SIZE); 716 mutex_init(&data->update_lock); 717 718 /* Tell the I2C layer a new client has arrived */ 719 if ((err = i2c_attach_client(client))) 720 goto exit_free; 721 722 /* Initialize the GL520SM chip */ 723 gl520_init_client(client); 724 725 /* Register sysfs hooks */ 726 if ((err = sysfs_create_group(&client->dev.kobj, &gl520_group))) 727 goto exit_detach; 728 729 if (data->two_temps) { 730 if ((err = device_create_file(&client->dev, 731 &sensor_dev_attr_temp2_input.dev_attr)) 732 || (err = device_create_file(&client->dev, 733 &sensor_dev_attr_temp2_max.dev_attr)) 734 || (err = device_create_file(&client->dev, 735 &sensor_dev_attr_temp2_max_hyst.dev_attr)) 736 || (err = device_create_file(&client->dev, 737 &sensor_dev_attr_temp2_alarm.dev_attr)) 738 || (err = device_create_file(&client->dev, 739 &sensor_dev_attr_temp2_beep.dev_attr))) 740 goto exit_remove_files; 741 } else { 742 if ((err = device_create_file(&client->dev, 743 &sensor_dev_attr_in4_input.dev_attr)) 744 || (err = device_create_file(&client->dev, 745 &sensor_dev_attr_in4_min.dev_attr)) 746 || (err = device_create_file(&client->dev, 747 &sensor_dev_attr_in4_max.dev_attr)) 748 || (err = device_create_file(&client->dev, 749 &sensor_dev_attr_in4_alarm.dev_attr)) 750 || (err = device_create_file(&client->dev, 751 &sensor_dev_attr_in4_beep.dev_attr))) 752 goto exit_remove_files; 753 } 754 755 756 data->hwmon_dev = hwmon_device_register(&client->dev); 757 if (IS_ERR(data->hwmon_dev)) { 758 err = PTR_ERR(data->hwmon_dev); 759 goto exit_remove_files; 760 } 761 762 return 0; 763 764 exit_remove_files: 765 sysfs_remove_group(&client->dev.kobj, &gl520_group); 766 sysfs_remove_group(&client->dev.kobj, &gl520_group_opt); 767 exit_detach: 768 i2c_detach_client(client); 769 exit_free: 770 kfree(data); 771 exit: 772 return err; 773 } 774 775 776 /* Called when we have found a new GL520SM. */ 777 static void gl520_init_client(struct i2c_client *client) 778 { 779 struct gl520_data *data = i2c_get_clientdata(client); 780 u8 oldconf, conf; 781 782 conf = oldconf = gl520_read_value(client, GL520_REG_CONF); 783 784 data->alarm_mask = 0xff; 785 data->vrm = vid_which_vrm(); 786 787 if (extra_sensor_type == 1) 788 conf &= ~0x10; 789 else if (extra_sensor_type == 2) 790 conf |= 0x10; 791 data->two_temps = !(conf & 0x10); 792 793 /* If IRQ# is disabled, we can safely force comparator mode */ 794 if (!(conf & 0x20)) 795 conf &= 0xf7; 796 797 /* Enable monitoring if needed */ 798 conf |= 0x40; 799 800 if (conf != oldconf) 801 gl520_write_value(client, GL520_REG_CONF, conf); 802 803 gl520_update_device(&(client->dev)); 804 805 if (data->fan_min[0] == 0) 806 data->alarm_mask &= ~0x20; 807 if (data->fan_min[1] == 0) 808 data->alarm_mask &= ~0x40; 809 810 data->beep_mask &= data->alarm_mask; 811 gl520_write_value(client, GL520_REG_BEEP_MASK, data->beep_mask); 812 } 813 814 static int gl520_detach_client(struct i2c_client *client) 815 { 816 struct gl520_data *data = i2c_get_clientdata(client); 817 int err; 818 819 hwmon_device_unregister(data->hwmon_dev); 820 sysfs_remove_group(&client->dev.kobj, &gl520_group); 821 sysfs_remove_group(&client->dev.kobj, &gl520_group_opt); 822 823 if ((err = i2c_detach_client(client))) 824 return err; 825 826 kfree(data); 827 return 0; 828 } 829 830 831 /* Registers 0x07 to 0x0c are word-sized, others are byte-sized 832 GL520 uses a high-byte first convention */ 833 static int gl520_read_value(struct i2c_client *client, u8 reg) 834 { 835 if ((reg >= 0x07) && (reg <= 0x0c)) 836 return swab16(i2c_smbus_read_word_data(client, reg)); 837 else 838 return i2c_smbus_read_byte_data(client, reg); 839 } 840 841 static int gl520_write_value(struct i2c_client *client, u8 reg, u16 value) 842 { 843 if ((reg >= 0x07) && (reg <= 0x0c)) 844 return i2c_smbus_write_word_data(client, reg, swab16(value)); 845 else 846 return i2c_smbus_write_byte_data(client, reg, value); 847 } 848 849 850 static struct gl520_data *gl520_update_device(struct device *dev) 851 { 852 struct i2c_client *client = to_i2c_client(dev); 853 struct gl520_data *data = i2c_get_clientdata(client); 854 int val, i; 855 856 mutex_lock(&data->update_lock); 857 858 if (time_after(jiffies, data->last_updated + 2 * HZ) || !data->valid) { 859 860 dev_dbg(&client->dev, "Starting gl520sm update\n"); 861 862 data->alarms = gl520_read_value(client, GL520_REG_ALARMS); 863 data->beep_mask = gl520_read_value(client, GL520_REG_BEEP_MASK); 864 data->vid = gl520_read_value(client, GL520_REG_VID_INPUT) & 0x1f; 865 866 for (i = 0; i < 4; i++) { 867 data->in_input[i] = gl520_read_value(client, 868 GL520_REG_IN_INPUT[i]); 869 val = gl520_read_value(client, GL520_REG_IN_LIMIT[i]); 870 data->in_min[i] = val & 0xff; 871 data->in_max[i] = (val >> 8) & 0xff; 872 } 873 874 val = gl520_read_value(client, GL520_REG_FAN_INPUT); 875 data->fan_input[0] = (val >> 8) & 0xff; 876 data->fan_input[1] = val & 0xff; 877 878 val = gl520_read_value(client, GL520_REG_FAN_MIN); 879 data->fan_min[0] = (val >> 8) & 0xff; 880 data->fan_min[1] = val & 0xff; 881 882 data->temp_input[0] = gl520_read_value(client, 883 GL520_REG_TEMP_INPUT[0]); 884 data->temp_max[0] = gl520_read_value(client, 885 GL520_REG_TEMP_MAX[0]); 886 data->temp_max_hyst[0] = gl520_read_value(client, 887 GL520_REG_TEMP_MAX_HYST[0]); 888 889 val = gl520_read_value(client, GL520_REG_FAN_DIV); 890 data->fan_div[0] = (val >> 6) & 0x03; 891 data->fan_div[1] = (val >> 4) & 0x03; 892 data->fan_off = (val >> 2) & 0x01; 893 894 data->alarms &= data->alarm_mask; 895 896 val = gl520_read_value(client, GL520_REG_CONF); 897 data->beep_enable = !((val >> 2) & 1); 898 899 /* Temp1 and Vin4 are the same input */ 900 if (data->two_temps) { 901 data->temp_input[1] = gl520_read_value(client, 902 GL520_REG_TEMP_INPUT[1]); 903 data->temp_max[1] = gl520_read_value(client, 904 GL520_REG_TEMP_MAX[1]); 905 data->temp_max_hyst[1] = gl520_read_value(client, 906 GL520_REG_TEMP_MAX_HYST[1]); 907 } else { 908 data->in_input[4] = gl520_read_value(client, 909 GL520_REG_IN_INPUT[4]); 910 data->in_min[4] = gl520_read_value(client, 911 GL520_REG_IN_MIN[4]); 912 data->in_max[4] = gl520_read_value(client, 913 GL520_REG_IN_MAX[4]); 914 } 915 916 data->last_updated = jiffies; 917 data->valid = 1; 918 } 919 920 mutex_unlock(&data->update_lock); 921 922 return data; 923 } 924 925 926 static int __init sensors_gl520sm_init(void) 927 { 928 return i2c_add_driver(&gl520_driver); 929 } 930 931 static void __exit sensors_gl520sm_exit(void) 932 { 933 i2c_del_driver(&gl520_driver); 934 } 935 936 937 MODULE_AUTHOR("Frodo Looijaard <frodol@dds.nl>, " 938 "Kyösti Mälkki <kmalkki@cc.hut.fi>, " 939 "Maarten Deprez <maartendeprez@users.sourceforge.net>"); 940 MODULE_DESCRIPTION("GL520SM driver"); 941 MODULE_LICENSE("GPL"); 942 943 module_init(sensors_gl520sm_init); 944 module_exit(sensors_gl520sm_exit); 945