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 Ky�sti M�lkki <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-vid.h> 31 #include <linux/err.h> 32 33 /* Type of the extra sensor */ 34 static unsigned short extra_sensor_type; 35 module_param(extra_sensor_type, ushort, 0); 36 MODULE_PARM_DESC(extra_sensor_type, "Type of extra sensor (0=autodetect, 1=temperature, 2=voltage)"); 37 38 /* Addresses to scan */ 39 static unsigned short normal_i2c[] = { 0x2c, 0x2d, I2C_CLIENT_END }; 40 41 /* Insmod parameters */ 42 I2C_CLIENT_INSMOD_1(gl520sm); 43 44 /* Many GL520 constants specified below 45 One of the inputs can be configured as either temp or voltage. 46 That's why _TEMP2 and _IN4 access the same register 47 */ 48 49 /* The GL520 registers */ 50 #define GL520_REG_CHIP_ID 0x00 51 #define GL520_REG_REVISION 0x01 52 #define GL520_REG_CONF 0x03 53 #define GL520_REG_MASK 0x11 54 55 #define GL520_REG_VID_INPUT 0x02 56 57 #define GL520_REG_IN0_INPUT 0x15 58 #define GL520_REG_IN0_LIMIT 0x0c 59 #define GL520_REG_IN0_MIN GL520_REG_IN0_LIMIT 60 #define GL520_REG_IN0_MAX GL520_REG_IN0_LIMIT 61 62 #define GL520_REG_IN1_INPUT 0x14 63 #define GL520_REG_IN1_LIMIT 0x09 64 #define GL520_REG_IN1_MIN GL520_REG_IN1_LIMIT 65 #define GL520_REG_IN1_MAX GL520_REG_IN1_LIMIT 66 67 #define GL520_REG_IN2_INPUT 0x13 68 #define GL520_REG_IN2_LIMIT 0x0a 69 #define GL520_REG_IN2_MIN GL520_REG_IN2_LIMIT 70 #define GL520_REG_IN2_MAX GL520_REG_IN2_LIMIT 71 72 #define GL520_REG_IN3_INPUT 0x0d 73 #define GL520_REG_IN3_LIMIT 0x0b 74 #define GL520_REG_IN3_MIN GL520_REG_IN3_LIMIT 75 #define GL520_REG_IN3_MAX GL520_REG_IN3_LIMIT 76 77 #define GL520_REG_IN4_INPUT 0x0e 78 #define GL520_REG_IN4_MAX 0x17 79 #define GL520_REG_IN4_MIN 0x18 80 81 #define GL520_REG_TEMP1_INPUT 0x04 82 #define GL520_REG_TEMP1_MAX 0x05 83 #define GL520_REG_TEMP1_MAX_HYST 0x06 84 85 #define GL520_REG_TEMP2_INPUT 0x0e 86 #define GL520_REG_TEMP2_MAX 0x17 87 #define GL520_REG_TEMP2_MAX_HYST 0x18 88 89 #define GL520_REG_FAN_INPUT 0x07 90 #define GL520_REG_FAN_MIN 0x08 91 #define GL520_REG_FAN_DIV 0x0f 92 #define GL520_REG_FAN_OFF GL520_REG_FAN_DIV 93 94 #define GL520_REG_ALARMS 0x12 95 #define GL520_REG_BEEP_MASK 0x10 96 #define GL520_REG_BEEP_ENABLE GL520_REG_CONF 97 98 /* 99 * Function declarations 100 */ 101 102 static int gl520_attach_adapter(struct i2c_adapter *adapter); 103 static int gl520_detect(struct i2c_adapter *adapter, int address, int kind); 104 static void gl520_init_client(struct i2c_client *client); 105 static int gl520_detach_client(struct i2c_client *client); 106 static int gl520_read_value(struct i2c_client *client, u8 reg); 107 static int gl520_write_value(struct i2c_client *client, u8 reg, u16 value); 108 static struct gl520_data *gl520_update_device(struct device *dev); 109 110 /* Driver data */ 111 static struct i2c_driver gl520_driver = { 112 .driver = { 113 .name = "gl520sm", 114 }, 115 .id = I2C_DRIVERID_GL520, 116 .attach_adapter = gl520_attach_adapter, 117 .detach_client = gl520_detach_client, 118 }; 119 120 /* Client data */ 121 struct gl520_data { 122 struct i2c_client client; 123 struct class_device *class_dev; 124 struct semaphore update_lock; 125 char valid; /* zero until the following fields are valid */ 126 unsigned long last_updated; /* in jiffies */ 127 128 u8 vid; 129 u8 vrm; 130 u8 in_input[5]; /* [0] = VVD */ 131 u8 in_min[5]; /* [0] = VDD */ 132 u8 in_max[5]; /* [0] = VDD */ 133 u8 fan_input[2]; 134 u8 fan_min[2]; 135 u8 fan_div[2]; 136 u8 fan_off; 137 u8 temp_input[2]; 138 u8 temp_max[2]; 139 u8 temp_max_hyst[2]; 140 u8 alarms; 141 u8 beep_enable; 142 u8 beep_mask; 143 u8 alarm_mask; 144 u8 two_temps; 145 }; 146 147 /* 148 * Sysfs stuff 149 */ 150 151 #define sysfs_r(type, n, item, reg) \ 152 static ssize_t get_##type##item (struct gl520_data *, char *, int); \ 153 static ssize_t get_##type##n##item (struct device *, struct device_attribute *attr, char *); \ 154 static ssize_t get_##type##n##item (struct device *dev, struct device_attribute *attr, char *buf) \ 155 { \ 156 struct gl520_data *data = gl520_update_device(dev); \ 157 return get_##type##item(data, buf, (n)); \ 158 } 159 160 #define sysfs_w(type, n, item, reg) \ 161 static ssize_t set_##type##item (struct i2c_client *, struct gl520_data *, const char *, size_t, int, int); \ 162 static ssize_t set_##type##n##item (struct device *, struct device_attribute *attr, const char *, size_t); \ 163 static ssize_t set_##type##n##item (struct device *dev, struct device_attribute *attr, const char *buf, size_t count) \ 164 { \ 165 struct i2c_client *client = to_i2c_client(dev); \ 166 struct gl520_data *data = i2c_get_clientdata(client); \ 167 return set_##type##item(client, data, buf, count, (n), reg); \ 168 } 169 170 #define sysfs_rw_n(type, n, item, reg) \ 171 sysfs_r(type, n, item, reg) \ 172 sysfs_w(type, n, item, reg) \ 173 static DEVICE_ATTR(type##n##item, S_IRUGO | S_IWUSR, get_##type##n##item, set_##type##n##item); 174 175 #define sysfs_ro_n(type, n, item, reg) \ 176 sysfs_r(type, n, item, reg) \ 177 static DEVICE_ATTR(type##n##item, S_IRUGO, get_##type##n##item, NULL); 178 179 #define sysfs_rw(type, item, reg) \ 180 sysfs_r(type, 0, item, reg) \ 181 sysfs_w(type, 0, item, reg) \ 182 static DEVICE_ATTR(type##item, S_IRUGO | S_IWUSR, get_##type##0##item, set_##type##0##item); 183 184 #define sysfs_ro(type, item, reg) \ 185 sysfs_r(type, 0, item, reg) \ 186 static DEVICE_ATTR(type##item, S_IRUGO, get_##type##0##item, NULL); 187 188 189 #define sysfs_vid(n) \ 190 sysfs_ro_n(cpu, n, _vid, GL520_REG_VID_INPUT) 191 192 #define device_create_file_vid(client, n) \ 193 device_create_file(&client->dev, &dev_attr_cpu##n##_vid) 194 195 #define sysfs_in(n) \ 196 sysfs_ro_n(in, n, _input, GL520_REG_IN##n##INPUT) \ 197 sysfs_rw_n(in, n, _min, GL520_REG_IN##n##_MIN) \ 198 sysfs_rw_n(in, n, _max, GL520_REG_IN##n##_MAX) \ 199 200 #define device_create_file_in(client, n) \ 201 ({device_create_file(&client->dev, &dev_attr_in##n##_input); \ 202 device_create_file(&client->dev, &dev_attr_in##n##_min); \ 203 device_create_file(&client->dev, &dev_attr_in##n##_max);}) 204 205 #define sysfs_fan(n) \ 206 sysfs_ro_n(fan, n, _input, GL520_REG_FAN_INPUT) \ 207 sysfs_rw_n(fan, n, _min, GL520_REG_FAN_MIN) \ 208 sysfs_rw_n(fan, n, _div, GL520_REG_FAN_DIV) 209 210 #define device_create_file_fan(client, n) \ 211 ({device_create_file(&client->dev, &dev_attr_fan##n##_input); \ 212 device_create_file(&client->dev, &dev_attr_fan##n##_min); \ 213 device_create_file(&client->dev, &dev_attr_fan##n##_div);}) 214 215 #define sysfs_fan_off(n) \ 216 sysfs_rw_n(fan, n, _off, GL520_REG_FAN_OFF) \ 217 218 #define device_create_file_fan_off(client, n) \ 219 device_create_file(&client->dev, &dev_attr_fan##n##_off) 220 221 #define sysfs_temp(n) \ 222 sysfs_ro_n(temp, n, _input, GL520_REG_TEMP##n##_INPUT) \ 223 sysfs_rw_n(temp, n, _max, GL520_REG_TEMP##n##_MAX) \ 224 sysfs_rw_n(temp, n, _max_hyst, GL520_REG_TEMP##n##_MAX_HYST) 225 226 #define device_create_file_temp(client, n) \ 227 ({device_create_file(&client->dev, &dev_attr_temp##n##_input); \ 228 device_create_file(&client->dev, &dev_attr_temp##n##_max); \ 229 device_create_file(&client->dev, &dev_attr_temp##n##_max_hyst);}) 230 231 #define sysfs_alarms() \ 232 sysfs_ro(alarms, , GL520_REG_ALARMS) \ 233 sysfs_rw(beep_enable, , GL520_REG_BEEP_ENABLE) \ 234 sysfs_rw(beep_mask, , GL520_REG_BEEP_MASK) 235 236 #define device_create_file_alarms(client) \ 237 ({device_create_file(&client->dev, &dev_attr_alarms); \ 238 device_create_file(&client->dev, &dev_attr_beep_enable); \ 239 device_create_file(&client->dev, &dev_attr_beep_mask);}) 240 241 242 sysfs_vid(0) 243 244 sysfs_in(0) 245 sysfs_in(1) 246 sysfs_in(2) 247 sysfs_in(3) 248 sysfs_in(4) 249 250 sysfs_fan(1) 251 sysfs_fan(2) 252 sysfs_fan_off(1) 253 254 sysfs_temp(1) 255 sysfs_temp(2) 256 257 sysfs_alarms() 258 259 260 static ssize_t get_cpu_vid(struct gl520_data *data, char *buf, int n) 261 { 262 return sprintf(buf, "%u\n", vid_from_reg(data->vid, data->vrm)); 263 } 264 265 #define VDD_FROM_REG(val) (((val)*95+2)/4) 266 #define VDD_TO_REG(val) (SENSORS_LIMIT((((val)*4+47)/95),0,255)) 267 268 #define IN_FROM_REG(val) ((val)*19) 269 #define IN_TO_REG(val) (SENSORS_LIMIT((((val)+9)/19),0,255)) 270 271 static ssize_t get_in_input(struct gl520_data *data, char *buf, int n) 272 { 273 u8 r = data->in_input[n]; 274 275 if (n == 0) 276 return sprintf(buf, "%d\n", VDD_FROM_REG(r)); 277 else 278 return sprintf(buf, "%d\n", IN_FROM_REG(r)); 279 } 280 281 static ssize_t get_in_min(struct gl520_data *data, char *buf, int n) 282 { 283 u8 r = data->in_min[n]; 284 285 if (n == 0) 286 return sprintf(buf, "%d\n", VDD_FROM_REG(r)); 287 else 288 return sprintf(buf, "%d\n", IN_FROM_REG(r)); 289 } 290 291 static ssize_t get_in_max(struct gl520_data *data, char *buf, int n) 292 { 293 u8 r = data->in_max[n]; 294 295 if (n == 0) 296 return sprintf(buf, "%d\n", VDD_FROM_REG(r)); 297 else 298 return sprintf(buf, "%d\n", IN_FROM_REG(r)); 299 } 300 301 static ssize_t set_in_min(struct i2c_client *client, struct gl520_data *data, const char *buf, size_t count, int n, int reg) 302 { 303 long v = simple_strtol(buf, NULL, 10); 304 u8 r; 305 306 down(&data->update_lock); 307 308 if (n == 0) 309 r = VDD_TO_REG(v); 310 else 311 r = IN_TO_REG(v); 312 313 data->in_min[n] = r; 314 315 if (n < 4) 316 gl520_write_value(client, reg, (gl520_read_value(client, reg) & ~0xff) | r); 317 else 318 gl520_write_value(client, reg, r); 319 320 up(&data->update_lock); 321 return count; 322 } 323 324 static ssize_t set_in_max(struct i2c_client *client, struct gl520_data *data, const char *buf, size_t count, int n, int reg) 325 { 326 long v = simple_strtol(buf, NULL, 10); 327 u8 r; 328 329 if (n == 0) 330 r = VDD_TO_REG(v); 331 else 332 r = IN_TO_REG(v); 333 334 down(&data->update_lock); 335 336 data->in_max[n] = r; 337 338 if (n < 4) 339 gl520_write_value(client, reg, (gl520_read_value(client, reg) & ~0xff00) | (r << 8)); 340 else 341 gl520_write_value(client, reg, r); 342 343 up(&data->update_lock); 344 return count; 345 } 346 347 #define DIV_FROM_REG(val) (1 << (val)) 348 #define FAN_FROM_REG(val,div) ((val)==0 ? 0 : (480000/((val) << (div)))) 349 #define FAN_TO_REG(val,div) ((val)<=0?0:SENSORS_LIMIT((480000 + ((val) << ((div)-1))) / ((val) << (div)), 1, 255)); 350 351 static ssize_t get_fan_input(struct gl520_data *data, char *buf, int n) 352 { 353 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_input[n - 1], data->fan_div[n - 1])); 354 } 355 356 static ssize_t get_fan_min(struct gl520_data *data, char *buf, int n) 357 { 358 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[n - 1], data->fan_div[n - 1])); 359 } 360 361 static ssize_t get_fan_div(struct gl520_data *data, char *buf, int n) 362 { 363 return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[n - 1])); 364 } 365 366 static ssize_t get_fan_off(struct gl520_data *data, char *buf, int n) 367 { 368 return sprintf(buf, "%d\n", data->fan_off); 369 } 370 371 static ssize_t set_fan_min(struct i2c_client *client, struct gl520_data *data, const char *buf, size_t count, int n, int reg) 372 { 373 unsigned long v = simple_strtoul(buf, NULL, 10); 374 u8 r; 375 376 down(&data->update_lock); 377 r = FAN_TO_REG(v, data->fan_div[n - 1]); 378 data->fan_min[n - 1] = r; 379 380 if (n == 1) 381 gl520_write_value(client, reg, (gl520_read_value(client, reg) & ~0xff00) | (r << 8)); 382 else 383 gl520_write_value(client, reg, (gl520_read_value(client, reg) & ~0xff) | r); 384 385 data->beep_mask = gl520_read_value(client, GL520_REG_BEEP_MASK); 386 if (data->fan_min[n - 1] == 0) 387 data->alarm_mask &= (n == 1) ? ~0x20 : ~0x40; 388 else 389 data->alarm_mask |= (n == 1) ? 0x20 : 0x40; 390 data->beep_mask &= data->alarm_mask; 391 gl520_write_value(client, GL520_REG_BEEP_MASK, data->beep_mask); 392 393 up(&data->update_lock); 394 return count; 395 } 396 397 static ssize_t set_fan_div(struct i2c_client *client, struct gl520_data *data, const char *buf, size_t count, int n, int reg) 398 { 399 unsigned long v = simple_strtoul(buf, NULL, 10); 400 u8 r; 401 402 switch (v) { 403 case 1: r = 0; break; 404 case 2: r = 1; break; 405 case 4: r = 2; break; 406 case 8: r = 3; break; 407 default: 408 dev_err(&client->dev, "fan_div value %ld not supported. Choose one of 1, 2, 4 or 8!\n", v); 409 return -EINVAL; 410 } 411 412 down(&data->update_lock); 413 data->fan_div[n - 1] = r; 414 415 if (n == 1) 416 gl520_write_value(client, reg, (gl520_read_value(client, reg) & ~0xc0) | (r << 6)); 417 else 418 gl520_write_value(client, reg, (gl520_read_value(client, reg) & ~0x30) | (r << 4)); 419 420 up(&data->update_lock); 421 return count; 422 } 423 424 static ssize_t set_fan_off(struct i2c_client *client, struct gl520_data *data, const char *buf, size_t count, int n, int reg) 425 { 426 u8 r = simple_strtoul(buf, NULL, 10)?1:0; 427 428 down(&data->update_lock); 429 data->fan_off = r; 430 gl520_write_value(client, reg, (gl520_read_value(client, reg) & ~0x0c) | (r << 2)); 431 up(&data->update_lock); 432 return count; 433 } 434 435 #define TEMP_FROM_REG(val) (((val) - 130) * 1000) 436 #define TEMP_TO_REG(val) (SENSORS_LIMIT(((((val)<0?(val)-500:(val)+500) / 1000)+130),0,255)) 437 438 static ssize_t get_temp_input(struct gl520_data *data, char *buf, int n) 439 { 440 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_input[n - 1])); 441 } 442 443 static ssize_t get_temp_max(struct gl520_data *data, char *buf, int n) 444 { 445 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max[n - 1])); 446 } 447 448 static ssize_t get_temp_max_hyst(struct gl520_data *data, char *buf, int n) 449 { 450 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max_hyst[n - 1])); 451 } 452 453 static ssize_t set_temp_max(struct i2c_client *client, struct gl520_data *data, const char *buf, size_t count, int n, int reg) 454 { 455 long v = simple_strtol(buf, NULL, 10); 456 457 down(&data->update_lock); 458 data->temp_max[n - 1] = TEMP_TO_REG(v);; 459 gl520_write_value(client, reg, data->temp_max[n - 1]); 460 up(&data->update_lock); 461 return count; 462 } 463 464 static ssize_t set_temp_max_hyst(struct i2c_client *client, struct gl520_data *data, const char *buf, size_t count, int n, int reg) 465 { 466 long v = simple_strtol(buf, NULL, 10); 467 468 down(&data->update_lock); 469 data->temp_max_hyst[n - 1] = TEMP_TO_REG(v); 470 gl520_write_value(client, reg, data->temp_max_hyst[n - 1]); 471 up(&data->update_lock); 472 return count; 473 } 474 475 static ssize_t get_alarms(struct gl520_data *data, char *buf, int n) 476 { 477 return sprintf(buf, "%d\n", data->alarms); 478 } 479 480 static ssize_t get_beep_enable(struct gl520_data *data, char *buf, int n) 481 { 482 return sprintf(buf, "%d\n", data->beep_enable); 483 } 484 485 static ssize_t get_beep_mask(struct gl520_data *data, char *buf, int n) 486 { 487 return sprintf(buf, "%d\n", data->beep_mask); 488 } 489 490 static ssize_t set_beep_enable(struct i2c_client *client, struct gl520_data *data, const char *buf, size_t count, int n, int reg) 491 { 492 u8 r = simple_strtoul(buf, NULL, 10)?0:1; 493 494 down(&data->update_lock); 495 data->beep_enable = !r; 496 gl520_write_value(client, reg, (gl520_read_value(client, reg) & ~0x04) | (r << 2)); 497 up(&data->update_lock); 498 return count; 499 } 500 501 static ssize_t set_beep_mask(struct i2c_client *client, struct gl520_data *data, const char *buf, size_t count, int n, int reg) 502 { 503 u8 r = simple_strtoul(buf, NULL, 10); 504 505 down(&data->update_lock); 506 r &= data->alarm_mask; 507 data->beep_mask = r; 508 gl520_write_value(client, reg, r); 509 up(&data->update_lock); 510 return count; 511 } 512 513 514 /* 515 * Real code 516 */ 517 518 static int gl520_attach_adapter(struct i2c_adapter *adapter) 519 { 520 if (!(adapter->class & I2C_CLASS_HWMON)) 521 return 0; 522 return i2c_probe(adapter, &addr_data, gl520_detect); 523 } 524 525 static int gl520_detect(struct i2c_adapter *adapter, int address, int kind) 526 { 527 struct i2c_client *new_client; 528 struct gl520_data *data; 529 int err = 0; 530 531 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA | 532 I2C_FUNC_SMBUS_WORD_DATA)) 533 goto exit; 534 535 /* OK. For now, we presume we have a valid client. We now create the 536 client structure, even though we cannot fill it completely yet. 537 But it allows us to access gl520_{read,write}_value. */ 538 539 if (!(data = kzalloc(sizeof(struct gl520_data), GFP_KERNEL))) { 540 err = -ENOMEM; 541 goto exit; 542 } 543 544 new_client = &data->client; 545 i2c_set_clientdata(new_client, data); 546 new_client->addr = address; 547 new_client->adapter = adapter; 548 new_client->driver = &gl520_driver; 549 new_client->flags = 0; 550 551 /* Determine the chip type. */ 552 if (kind < 0) { 553 if ((gl520_read_value(new_client, GL520_REG_CHIP_ID) != 0x20) || 554 ((gl520_read_value(new_client, GL520_REG_REVISION) & 0x7f) != 0x00) || 555 ((gl520_read_value(new_client, GL520_REG_CONF) & 0x80) != 0x00)) { 556 dev_dbg(&new_client->dev, "Unknown chip type, skipping\n"); 557 goto exit_free; 558 } 559 } 560 561 /* Fill in the remaining client fields */ 562 strlcpy(new_client->name, "gl520sm", I2C_NAME_SIZE); 563 data->valid = 0; 564 init_MUTEX(&data->update_lock); 565 566 /* Tell the I2C layer a new client has arrived */ 567 if ((err = i2c_attach_client(new_client))) 568 goto exit_free; 569 570 /* Initialize the GL520SM chip */ 571 gl520_init_client(new_client); 572 573 /* Register sysfs hooks */ 574 data->class_dev = hwmon_device_register(&new_client->dev); 575 if (IS_ERR(data->class_dev)) { 576 err = PTR_ERR(data->class_dev); 577 goto exit_detach; 578 } 579 580 device_create_file_vid(new_client, 0); 581 582 device_create_file_in(new_client, 0); 583 device_create_file_in(new_client, 1); 584 device_create_file_in(new_client, 2); 585 device_create_file_in(new_client, 3); 586 if (!data->two_temps) 587 device_create_file_in(new_client, 4); 588 589 device_create_file_fan(new_client, 1); 590 device_create_file_fan(new_client, 2); 591 device_create_file_fan_off(new_client, 1); 592 593 device_create_file_temp(new_client, 1); 594 if (data->two_temps) 595 device_create_file_temp(new_client, 2); 596 597 device_create_file_alarms(new_client); 598 599 return 0; 600 601 exit_detach: 602 i2c_detach_client(new_client); 603 exit_free: 604 kfree(data); 605 exit: 606 return err; 607 } 608 609 610 /* Called when we have found a new GL520SM. */ 611 static void gl520_init_client(struct i2c_client *client) 612 { 613 struct gl520_data *data = i2c_get_clientdata(client); 614 u8 oldconf, conf; 615 616 conf = oldconf = gl520_read_value(client, GL520_REG_CONF); 617 618 data->alarm_mask = 0xff; 619 data->vrm = vid_which_vrm(); 620 621 if (extra_sensor_type == 1) 622 conf &= ~0x10; 623 else if (extra_sensor_type == 2) 624 conf |= 0x10; 625 data->two_temps = !(conf & 0x10); 626 627 /* If IRQ# is disabled, we can safely force comparator mode */ 628 if (!(conf & 0x20)) 629 conf &= 0xf7; 630 631 /* Enable monitoring if needed */ 632 conf |= 0x40; 633 634 if (conf != oldconf) 635 gl520_write_value(client, GL520_REG_CONF, conf); 636 637 gl520_update_device(&(client->dev)); 638 639 if (data->fan_min[0] == 0) 640 data->alarm_mask &= ~0x20; 641 if (data->fan_min[1] == 0) 642 data->alarm_mask &= ~0x40; 643 644 data->beep_mask &= data->alarm_mask; 645 gl520_write_value(client, GL520_REG_BEEP_MASK, data->beep_mask); 646 } 647 648 static int gl520_detach_client(struct i2c_client *client) 649 { 650 struct gl520_data *data = i2c_get_clientdata(client); 651 int err; 652 653 hwmon_device_unregister(data->class_dev); 654 655 if ((err = i2c_detach_client(client))) 656 return err; 657 658 kfree(data); 659 return 0; 660 } 661 662 663 /* Registers 0x07 to 0x0c are word-sized, others are byte-sized 664 GL520 uses a high-byte first convention */ 665 static int gl520_read_value(struct i2c_client *client, u8 reg) 666 { 667 if ((reg >= 0x07) && (reg <= 0x0c)) 668 return swab16(i2c_smbus_read_word_data(client, reg)); 669 else 670 return i2c_smbus_read_byte_data(client, reg); 671 } 672 673 static int gl520_write_value(struct i2c_client *client, u8 reg, u16 value) 674 { 675 if ((reg >= 0x07) && (reg <= 0x0c)) 676 return i2c_smbus_write_word_data(client, reg, swab16(value)); 677 else 678 return i2c_smbus_write_byte_data(client, reg, value); 679 } 680 681 682 static struct gl520_data *gl520_update_device(struct device *dev) 683 { 684 struct i2c_client *client = to_i2c_client(dev); 685 struct gl520_data *data = i2c_get_clientdata(client); 686 int val; 687 688 down(&data->update_lock); 689 690 if (time_after(jiffies, data->last_updated + 2 * HZ) || !data->valid) { 691 692 dev_dbg(&client->dev, "Starting gl520sm update\n"); 693 694 data->alarms = gl520_read_value(client, GL520_REG_ALARMS); 695 data->beep_mask = gl520_read_value(client, GL520_REG_BEEP_MASK); 696 data->vid = gl520_read_value(client, GL520_REG_VID_INPUT) & 0x1f; 697 698 val = gl520_read_value(client, GL520_REG_IN0_LIMIT); 699 data->in_min[0] = val & 0xff; 700 data->in_max[0] = (val >> 8) & 0xff; 701 val = gl520_read_value(client, GL520_REG_IN1_LIMIT); 702 data->in_min[1] = val & 0xff; 703 data->in_max[1] = (val >> 8) & 0xff; 704 val = gl520_read_value(client, GL520_REG_IN2_LIMIT); 705 data->in_min[2] = val & 0xff; 706 data->in_max[2] = (val >> 8) & 0xff; 707 val = gl520_read_value(client, GL520_REG_IN3_LIMIT); 708 data->in_min[3] = val & 0xff; 709 data->in_max[3] = (val >> 8) & 0xff; 710 711 val = gl520_read_value(client, GL520_REG_FAN_INPUT); 712 data->fan_input[0] = (val >> 8) & 0xff; 713 data->fan_input[1] = val & 0xff; 714 715 val = gl520_read_value(client, GL520_REG_FAN_MIN); 716 data->fan_min[0] = (val >> 8) & 0xff; 717 data->fan_min[1] = val & 0xff; 718 719 data->temp_input[0] = gl520_read_value(client, GL520_REG_TEMP1_INPUT); 720 data->temp_max[0] = gl520_read_value(client, GL520_REG_TEMP1_MAX); 721 data->temp_max_hyst[0] = gl520_read_value(client, GL520_REG_TEMP1_MAX_HYST); 722 723 val = gl520_read_value(client, GL520_REG_FAN_DIV); 724 data->fan_div[0] = (val >> 6) & 0x03; 725 data->fan_div[1] = (val >> 4) & 0x03; 726 data->fan_off = (val >> 2) & 0x01; 727 728 data->alarms &= data->alarm_mask; 729 730 val = gl520_read_value(client, GL520_REG_CONF); 731 data->beep_enable = !((val >> 2) & 1); 732 733 data->in_input[0] = gl520_read_value(client, GL520_REG_IN0_INPUT); 734 data->in_input[1] = gl520_read_value(client, GL520_REG_IN1_INPUT); 735 data->in_input[2] = gl520_read_value(client, GL520_REG_IN2_INPUT); 736 data->in_input[3] = gl520_read_value(client, GL520_REG_IN3_INPUT); 737 738 /* Temp1 and Vin4 are the same input */ 739 if (data->two_temps) { 740 data->temp_input[1] = gl520_read_value(client, GL520_REG_TEMP2_INPUT); 741 data->temp_max[1] = gl520_read_value(client, GL520_REG_TEMP2_MAX); 742 data->temp_max_hyst[1] = gl520_read_value(client, GL520_REG_TEMP2_MAX_HYST); 743 } else { 744 data->in_input[4] = gl520_read_value(client, GL520_REG_IN4_INPUT); 745 data->in_min[4] = gl520_read_value(client, GL520_REG_IN4_MIN); 746 data->in_max[4] = gl520_read_value(client, GL520_REG_IN4_MAX); 747 } 748 749 data->last_updated = jiffies; 750 data->valid = 1; 751 } 752 753 up(&data->update_lock); 754 755 return data; 756 } 757 758 759 static int __init sensors_gl520sm_init(void) 760 { 761 return i2c_add_driver(&gl520_driver); 762 } 763 764 static void __exit sensors_gl520sm_exit(void) 765 { 766 i2c_del_driver(&gl520_driver); 767 } 768 769 770 MODULE_AUTHOR("Frodo Looijaard <frodol@dds.nl>, " 771 "Ky�sti M�lkki <kmalkki@cc.hut.fi>, " 772 "Maarten Deprez <maartendeprez@users.sourceforge.net>"); 773 MODULE_DESCRIPTION("GL520SM driver"); 774 MODULE_LICENSE("GPL"); 775 776 module_init(sensors_gl520sm_init); 777 module_exit(sensors_gl520sm_exit); 778