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/i2c-sensor.h> 30 #include <linux/i2c-vid.h> 31 32 /* Type of the extra sensor */ 33 static unsigned short extra_sensor_type; 34 module_param(extra_sensor_type, ushort, 0); 35 MODULE_PARM_DESC(extra_sensor_type, "Type of extra sensor (0=autodetect, 1=temperature, 2=voltage)"); 36 37 /* Addresses to scan */ 38 static unsigned short normal_i2c[] = { 0x2c, 0x2d, I2C_CLIENT_END }; 39 static unsigned int normal_isa[] = { I2C_CLIENT_ISA_END }; 40 41 /* Insmod parameters */ 42 SENSORS_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 .owner = THIS_MODULE, 113 .name = "gl520sm", 114 .id = I2C_DRIVERID_GL520, 115 .flags = I2C_DF_NOTIFY, 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 semaphore update_lock; 124 char valid; /* zero until the following fields are valid */ 125 unsigned long last_updated; /* in jiffies */ 126 127 u8 vid; 128 u8 vrm; 129 u8 in_input[5]; /* [0] = VVD */ 130 u8 in_min[5]; /* [0] = VDD */ 131 u8 in_max[5]; /* [0] = VDD */ 132 u8 fan_input[2]; 133 u8 fan_min[2]; 134 u8 fan_div[2]; 135 u8 fan_off; 136 u8 temp_input[2]; 137 u8 temp_max[2]; 138 u8 temp_max_hyst[2]; 139 u8 alarms; 140 u8 beep_enable; 141 u8 beep_mask; 142 u8 alarm_mask; 143 u8 two_temps; 144 }; 145 146 /* 147 * Sysfs stuff 148 */ 149 150 #define sysfs_r(type, n, item, reg) \ 151 static ssize_t get_##type##item (struct gl520_data *, char *, int); \ 152 static ssize_t get_##type##n##item (struct device *, struct device_attribute *attr, char *); \ 153 static ssize_t get_##type##n##item (struct device *dev, struct device_attribute *attr, char *buf) \ 154 { \ 155 struct gl520_data *data = gl520_update_device(dev); \ 156 return get_##type##item(data, buf, (n)); \ 157 } 158 159 #define sysfs_w(type, n, item, reg) \ 160 static ssize_t set_##type##item (struct i2c_client *, struct gl520_data *, const char *, size_t, int, int); \ 161 static ssize_t set_##type##n##item (struct device *, struct device_attribute *attr, const char *, size_t); \ 162 static ssize_t set_##type##n##item (struct device *dev, struct device_attribute *attr, const char *buf, size_t count) \ 163 { \ 164 struct i2c_client *client = to_i2c_client(dev); \ 165 struct gl520_data *data = i2c_get_clientdata(client); \ 166 return set_##type##item(client, data, buf, count, (n), reg); \ 167 } 168 169 #define sysfs_rw_n(type, n, item, reg) \ 170 sysfs_r(type, n, item, reg) \ 171 sysfs_w(type, n, item, reg) \ 172 static DEVICE_ATTR(type##n##item, S_IRUGO | S_IWUSR, get_##type##n##item, set_##type##n##item); 173 174 #define sysfs_ro_n(type, n, item, reg) \ 175 sysfs_r(type, n, item, reg) \ 176 static DEVICE_ATTR(type##n##item, S_IRUGO, get_##type##n##item, NULL); 177 178 #define sysfs_rw(type, item, reg) \ 179 sysfs_r(type, 0, item, reg) \ 180 sysfs_w(type, 0, item, reg) \ 181 static DEVICE_ATTR(type##item, S_IRUGO | S_IWUSR, get_##type##0##item, set_##type##0##item); 182 183 #define sysfs_ro(type, item, reg) \ 184 sysfs_r(type, 0, item, reg) \ 185 static DEVICE_ATTR(type##item, S_IRUGO, get_##type##0##item, NULL); 186 187 188 #define sysfs_vid(n) \ 189 sysfs_ro_n(cpu, n, _vid, GL520_REG_VID_INPUT) 190 191 #define device_create_file_vid(client, n) \ 192 device_create_file(&client->dev, &dev_attr_cpu##n##_vid) 193 194 #define sysfs_in(n) \ 195 sysfs_ro_n(in, n, _input, GL520_REG_IN##n##INPUT) \ 196 sysfs_rw_n(in, n, _min, GL520_REG_IN##n##_MIN) \ 197 sysfs_rw_n(in, n, _max, GL520_REG_IN##n##_MAX) \ 198 199 #define device_create_file_in(client, n) \ 200 ({device_create_file(&client->dev, &dev_attr_in##n##_input); \ 201 device_create_file(&client->dev, &dev_attr_in##n##_min); \ 202 device_create_file(&client->dev, &dev_attr_in##n##_max);}) 203 204 #define sysfs_fan(n) \ 205 sysfs_ro_n(fan, n, _input, GL520_REG_FAN_INPUT) \ 206 sysfs_rw_n(fan, n, _min, GL520_REG_FAN_MIN) \ 207 sysfs_rw_n(fan, n, _div, GL520_REG_FAN_DIV) 208 209 #define device_create_file_fan(client, n) \ 210 ({device_create_file(&client->dev, &dev_attr_fan##n##_input); \ 211 device_create_file(&client->dev, &dev_attr_fan##n##_min); \ 212 device_create_file(&client->dev, &dev_attr_fan##n##_div);}) 213 214 #define sysfs_fan_off(n) \ 215 sysfs_rw_n(fan, n, _off, GL520_REG_FAN_OFF) \ 216 217 #define device_create_file_fan_off(client, n) \ 218 device_create_file(&client->dev, &dev_attr_fan##n##_off) 219 220 #define sysfs_temp(n) \ 221 sysfs_ro_n(temp, n, _input, GL520_REG_TEMP##n##_INPUT) \ 222 sysfs_rw_n(temp, n, _max, GL520_REG_TEMP##n##_MAX) \ 223 sysfs_rw_n(temp, n, _max_hyst, GL520_REG_TEMP##n##_MAX_HYST) 224 225 #define device_create_file_temp(client, n) \ 226 ({device_create_file(&client->dev, &dev_attr_temp##n##_input); \ 227 device_create_file(&client->dev, &dev_attr_temp##n##_max); \ 228 device_create_file(&client->dev, &dev_attr_temp##n##_max_hyst);}) 229 230 #define sysfs_alarms() \ 231 sysfs_ro(alarms, , GL520_REG_ALARMS) \ 232 sysfs_rw(beep_enable, , GL520_REG_BEEP_ENABLE) \ 233 sysfs_rw(beep_mask, , GL520_REG_BEEP_MASK) 234 235 #define device_create_file_alarms(client) \ 236 ({device_create_file(&client->dev, &dev_attr_alarms); \ 237 device_create_file(&client->dev, &dev_attr_beep_enable); \ 238 device_create_file(&client->dev, &dev_attr_beep_mask);}) 239 240 241 sysfs_vid(0) 242 243 sysfs_in(0) 244 sysfs_in(1) 245 sysfs_in(2) 246 sysfs_in(3) 247 sysfs_in(4) 248 249 sysfs_fan(1) 250 sysfs_fan(2) 251 sysfs_fan_off(1) 252 253 sysfs_temp(1) 254 sysfs_temp(2) 255 256 sysfs_alarms() 257 258 259 static ssize_t get_cpu_vid(struct gl520_data *data, char *buf, int n) 260 { 261 return sprintf(buf, "%u\n", vid_from_reg(data->vid, data->vrm)); 262 } 263 264 #define VDD_FROM_REG(val) (((val)*95+2)/4) 265 #define VDD_TO_REG(val) (SENSORS_LIMIT((((val)*4+47)/95),0,255)) 266 267 #define IN_FROM_REG(val) ((val)*19) 268 #define IN_TO_REG(val) (SENSORS_LIMIT((((val)+9)/19),0,255)) 269 270 static ssize_t get_in_input(struct gl520_data *data, char *buf, int n) 271 { 272 u8 r = data->in_input[n]; 273 274 if (n == 0) 275 return sprintf(buf, "%d\n", VDD_FROM_REG(r)); 276 else 277 return sprintf(buf, "%d\n", IN_FROM_REG(r)); 278 } 279 280 static ssize_t get_in_min(struct gl520_data *data, char *buf, int n) 281 { 282 u8 r = data->in_min[n]; 283 284 if (n == 0) 285 return sprintf(buf, "%d\n", VDD_FROM_REG(r)); 286 else 287 return sprintf(buf, "%d\n", IN_FROM_REG(r)); 288 } 289 290 static ssize_t get_in_max(struct gl520_data *data, char *buf, int n) 291 { 292 u8 r = data->in_max[n]; 293 294 if (n == 0) 295 return sprintf(buf, "%d\n", VDD_FROM_REG(r)); 296 else 297 return sprintf(buf, "%d\n", IN_FROM_REG(r)); 298 } 299 300 static ssize_t set_in_min(struct i2c_client *client, struct gl520_data *data, const char *buf, size_t count, int n, int reg) 301 { 302 long v = simple_strtol(buf, NULL, 10); 303 u8 r; 304 305 down(&data->update_lock); 306 307 if (n == 0) 308 r = VDD_TO_REG(v); 309 else 310 r = IN_TO_REG(v); 311 312 data->in_min[n] = r; 313 314 if (n < 4) 315 gl520_write_value(client, reg, (gl520_read_value(client, reg) & ~0xff) | r); 316 else 317 gl520_write_value(client, reg, r); 318 319 up(&data->update_lock); 320 return count; 321 } 322 323 static ssize_t set_in_max(struct i2c_client *client, struct gl520_data *data, const char *buf, size_t count, int n, int reg) 324 { 325 long v = simple_strtol(buf, NULL, 10); 326 u8 r; 327 328 if (n == 0) 329 r = VDD_TO_REG(v); 330 else 331 r = IN_TO_REG(v); 332 333 down(&data->update_lock); 334 335 data->in_max[n] = r; 336 337 if (n < 4) 338 gl520_write_value(client, reg, (gl520_read_value(client, reg) & ~0xff00) | (r << 8)); 339 else 340 gl520_write_value(client, reg, r); 341 342 up(&data->update_lock); 343 return count; 344 } 345 346 #define DIV_FROM_REG(val) (1 << (val)) 347 #define FAN_FROM_REG(val,div) ((val)==0 ? 0 : (480000/((val) << (div)))) 348 #define FAN_TO_REG(val,div) ((val)<=0?0:SENSORS_LIMIT((480000 + ((val) << ((div)-1))) / ((val) << (div)), 1, 255)); 349 350 static ssize_t get_fan_input(struct gl520_data *data, char *buf, int n) 351 { 352 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_input[n - 1], data->fan_div[n - 1])); 353 } 354 355 static ssize_t get_fan_min(struct gl520_data *data, char *buf, int n) 356 { 357 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[n - 1], data->fan_div[n - 1])); 358 } 359 360 static ssize_t get_fan_div(struct gl520_data *data, char *buf, int n) 361 { 362 return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[n - 1])); 363 } 364 365 static ssize_t get_fan_off(struct gl520_data *data, char *buf, int n) 366 { 367 return sprintf(buf, "%d\n", data->fan_off); 368 } 369 370 static ssize_t set_fan_min(struct i2c_client *client, struct gl520_data *data, const char *buf, size_t count, int n, int reg) 371 { 372 unsigned long v = simple_strtoul(buf, NULL, 10); 373 u8 r; 374 375 down(&data->update_lock); 376 r = FAN_TO_REG(v, data->fan_div[n - 1]); 377 data->fan_min[n - 1] = r; 378 379 if (n == 1) 380 gl520_write_value(client, reg, (gl520_read_value(client, reg) & ~0xff00) | (r << 8)); 381 else 382 gl520_write_value(client, reg, (gl520_read_value(client, reg) & ~0xff) | r); 383 384 data->beep_mask = gl520_read_value(client, GL520_REG_BEEP_MASK); 385 if (data->fan_min[n - 1] == 0) 386 data->alarm_mask &= (n == 1) ? ~0x20 : ~0x40; 387 else 388 data->alarm_mask |= (n == 1) ? 0x20 : 0x40; 389 data->beep_mask &= data->alarm_mask; 390 gl520_write_value(client, GL520_REG_BEEP_MASK, data->beep_mask); 391 392 up(&data->update_lock); 393 return count; 394 } 395 396 static ssize_t set_fan_div(struct i2c_client *client, struct gl520_data *data, const char *buf, size_t count, int n, int reg) 397 { 398 unsigned long v = simple_strtoul(buf, NULL, 10); 399 u8 r; 400 401 switch (v) { 402 case 1: r = 0; break; 403 case 2: r = 1; break; 404 case 4: r = 2; break; 405 case 8: r = 3; break; 406 default: 407 dev_err(&client->dev, "fan_div value %ld not supported. Choose one of 1, 2, 4 or 8!\n", v); 408 return -EINVAL; 409 } 410 411 down(&data->update_lock); 412 data->fan_div[n - 1] = r; 413 414 if (n == 1) 415 gl520_write_value(client, reg, (gl520_read_value(client, reg) & ~0xc0) | (r << 6)); 416 else 417 gl520_write_value(client, reg, (gl520_read_value(client, reg) & ~0x30) | (r << 4)); 418 419 up(&data->update_lock); 420 return count; 421 } 422 423 static ssize_t set_fan_off(struct i2c_client *client, struct gl520_data *data, const char *buf, size_t count, int n, int reg) 424 { 425 u8 r = simple_strtoul(buf, NULL, 10)?1:0; 426 427 down(&data->update_lock); 428 data->fan_off = r; 429 gl520_write_value(client, reg, (gl520_read_value(client, reg) & ~0x0c) | (r << 2)); 430 up(&data->update_lock); 431 return count; 432 } 433 434 #define TEMP_FROM_REG(val) (((val) - 130) * 1000) 435 #define TEMP_TO_REG(val) (SENSORS_LIMIT(((((val)<0?(val)-500:(val)+500) / 1000)+130),0,255)) 436 437 static ssize_t get_temp_input(struct gl520_data *data, char *buf, int n) 438 { 439 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_input[n - 1])); 440 } 441 442 static ssize_t get_temp_max(struct gl520_data *data, char *buf, int n) 443 { 444 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max[n - 1])); 445 } 446 447 static ssize_t get_temp_max_hyst(struct gl520_data *data, char *buf, int n) 448 { 449 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max_hyst[n - 1])); 450 } 451 452 static ssize_t set_temp_max(struct i2c_client *client, struct gl520_data *data, const char *buf, size_t count, int n, int reg) 453 { 454 long v = simple_strtol(buf, NULL, 10); 455 456 down(&data->update_lock); 457 data->temp_max[n - 1] = TEMP_TO_REG(v);; 458 gl520_write_value(client, reg, data->temp_max[n - 1]); 459 up(&data->update_lock); 460 return count; 461 } 462 463 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) 464 { 465 long v = simple_strtol(buf, NULL, 10); 466 467 down(&data->update_lock); 468 data->temp_max_hyst[n - 1] = TEMP_TO_REG(v); 469 gl520_write_value(client, reg, data->temp_max_hyst[n - 1]); 470 up(&data->update_lock); 471 return count; 472 } 473 474 static ssize_t get_alarms(struct gl520_data *data, char *buf, int n) 475 { 476 return sprintf(buf, "%d\n", data->alarms); 477 } 478 479 static ssize_t get_beep_enable(struct gl520_data *data, char *buf, int n) 480 { 481 return sprintf(buf, "%d\n", data->beep_enable); 482 } 483 484 static ssize_t get_beep_mask(struct gl520_data *data, char *buf, int n) 485 { 486 return sprintf(buf, "%d\n", data->beep_mask); 487 } 488 489 static ssize_t set_beep_enable(struct i2c_client *client, struct gl520_data *data, const char *buf, size_t count, int n, int reg) 490 { 491 u8 r = simple_strtoul(buf, NULL, 10)?0:1; 492 493 down(&data->update_lock); 494 data->beep_enable = !r; 495 gl520_write_value(client, reg, (gl520_read_value(client, reg) & ~0x04) | (r << 2)); 496 up(&data->update_lock); 497 return count; 498 } 499 500 static ssize_t set_beep_mask(struct i2c_client *client, struct gl520_data *data, const char *buf, size_t count, int n, int reg) 501 { 502 u8 r = simple_strtoul(buf, NULL, 10); 503 504 down(&data->update_lock); 505 r &= data->alarm_mask; 506 data->beep_mask = r; 507 gl520_write_value(client, reg, r); 508 up(&data->update_lock); 509 return count; 510 } 511 512 513 /* 514 * Real code 515 */ 516 517 static int gl520_attach_adapter(struct i2c_adapter *adapter) 518 { 519 if (!(adapter->class & I2C_CLASS_HWMON)) 520 return 0; 521 return i2c_detect(adapter, &addr_data, gl520_detect); 522 } 523 524 static int gl520_detect(struct i2c_adapter *adapter, int address, int kind) 525 { 526 struct i2c_client *new_client; 527 struct gl520_data *data; 528 int err = 0; 529 530 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA | 531 I2C_FUNC_SMBUS_WORD_DATA)) 532 goto exit; 533 534 /* OK. For now, we presume we have a valid client. We now create the 535 client structure, even though we cannot fill it completely yet. 536 But it allows us to access gl520_{read,write}_value. */ 537 538 if (!(data = kmalloc(sizeof(struct gl520_data), GFP_KERNEL))) { 539 err = -ENOMEM; 540 goto exit; 541 } 542 memset(data, 0, sizeof(struct gl520_data)); 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 device_create_file_vid(new_client, 0); 575 576 device_create_file_in(new_client, 0); 577 device_create_file_in(new_client, 1); 578 device_create_file_in(new_client, 2); 579 device_create_file_in(new_client, 3); 580 if (!data->two_temps) 581 device_create_file_in(new_client, 4); 582 583 device_create_file_fan(new_client, 1); 584 device_create_file_fan(new_client, 2); 585 device_create_file_fan_off(new_client, 1); 586 587 device_create_file_temp(new_client, 1); 588 if (data->two_temps) 589 device_create_file_temp(new_client, 2); 590 591 device_create_file_alarms(new_client); 592 593 return 0; 594 595 exit_free: 596 kfree(data); 597 exit: 598 return err; 599 } 600 601 602 /* Called when we have found a new GL520SM. */ 603 static void gl520_init_client(struct i2c_client *client) 604 { 605 struct gl520_data *data = i2c_get_clientdata(client); 606 u8 oldconf, conf; 607 608 conf = oldconf = gl520_read_value(client, GL520_REG_CONF); 609 610 data->alarm_mask = 0xff; 611 data->vrm = i2c_which_vrm(); 612 613 if (extra_sensor_type == 1) 614 conf &= ~0x10; 615 else if (extra_sensor_type == 2) 616 conf |= 0x10; 617 data->two_temps = !(conf & 0x10); 618 619 /* If IRQ# is disabled, we can safely force comparator mode */ 620 if (!(conf & 0x20)) 621 conf &= 0xf7; 622 623 /* Enable monitoring if needed */ 624 conf |= 0x40; 625 626 if (conf != oldconf) 627 gl520_write_value(client, GL520_REG_CONF, conf); 628 629 gl520_update_device(&(client->dev)); 630 631 if (data->fan_min[0] == 0) 632 data->alarm_mask &= ~0x20; 633 if (data->fan_min[1] == 0) 634 data->alarm_mask &= ~0x40; 635 636 data->beep_mask &= data->alarm_mask; 637 gl520_write_value(client, GL520_REG_BEEP_MASK, data->beep_mask); 638 } 639 640 static int gl520_detach_client(struct i2c_client *client) 641 { 642 int err; 643 644 if ((err = i2c_detach_client(client))) { 645 dev_err(&client->dev, "Client deregistration failed, " 646 "client not detached.\n"); 647 return err; 648 } 649 650 kfree(i2c_get_clientdata(client)); 651 return 0; 652 } 653 654 655 /* Registers 0x07 to 0x0c are word-sized, others are byte-sized 656 GL520 uses a high-byte first convention */ 657 static int gl520_read_value(struct i2c_client *client, u8 reg) 658 { 659 if ((reg >= 0x07) && (reg <= 0x0c)) 660 return swab16(i2c_smbus_read_word_data(client, reg)); 661 else 662 return i2c_smbus_read_byte_data(client, reg); 663 } 664 665 static int gl520_write_value(struct i2c_client *client, u8 reg, u16 value) 666 { 667 if ((reg >= 0x07) && (reg <= 0x0c)) 668 return i2c_smbus_write_word_data(client, reg, swab16(value)); 669 else 670 return i2c_smbus_write_byte_data(client, reg, value); 671 } 672 673 674 static struct gl520_data *gl520_update_device(struct device *dev) 675 { 676 struct i2c_client *client = to_i2c_client(dev); 677 struct gl520_data *data = i2c_get_clientdata(client); 678 int val; 679 680 down(&data->update_lock); 681 682 if (time_after(jiffies, data->last_updated + 2 * HZ) || !data->valid) { 683 684 dev_dbg(&client->dev, "Starting gl520sm update\n"); 685 686 data->alarms = gl520_read_value(client, GL520_REG_ALARMS); 687 data->beep_mask = gl520_read_value(client, GL520_REG_BEEP_MASK); 688 data->vid = gl520_read_value(client, GL520_REG_VID_INPUT) & 0x1f; 689 690 val = gl520_read_value(client, GL520_REG_IN0_LIMIT); 691 data->in_min[0] = val & 0xff; 692 data->in_max[0] = (val >> 8) & 0xff; 693 val = gl520_read_value(client, GL520_REG_IN1_LIMIT); 694 data->in_min[1] = val & 0xff; 695 data->in_max[1] = (val >> 8) & 0xff; 696 val = gl520_read_value(client, GL520_REG_IN2_LIMIT); 697 data->in_min[2] = val & 0xff; 698 data->in_max[2] = (val >> 8) & 0xff; 699 val = gl520_read_value(client, GL520_REG_IN3_LIMIT); 700 data->in_min[3] = val & 0xff; 701 data->in_max[3] = (val >> 8) & 0xff; 702 703 val = gl520_read_value(client, GL520_REG_FAN_INPUT); 704 data->fan_input[0] = (val >> 8) & 0xff; 705 data->fan_input[1] = val & 0xff; 706 707 val = gl520_read_value(client, GL520_REG_FAN_MIN); 708 data->fan_min[0] = (val >> 8) & 0xff; 709 data->fan_min[1] = val & 0xff; 710 711 data->temp_input[0] = gl520_read_value(client, GL520_REG_TEMP1_INPUT); 712 data->temp_max[0] = gl520_read_value(client, GL520_REG_TEMP1_MAX); 713 data->temp_max_hyst[0] = gl520_read_value(client, GL520_REG_TEMP1_MAX_HYST); 714 715 val = gl520_read_value(client, GL520_REG_FAN_DIV); 716 data->fan_div[0] = (val >> 6) & 0x03; 717 data->fan_div[1] = (val >> 4) & 0x03; 718 data->fan_off = (val >> 2) & 0x01; 719 720 data->alarms &= data->alarm_mask; 721 722 val = gl520_read_value(client, GL520_REG_CONF); 723 data->beep_enable = !((val >> 2) & 1); 724 725 data->in_input[0] = gl520_read_value(client, GL520_REG_IN0_INPUT); 726 data->in_input[1] = gl520_read_value(client, GL520_REG_IN1_INPUT); 727 data->in_input[2] = gl520_read_value(client, GL520_REG_IN2_INPUT); 728 data->in_input[3] = gl520_read_value(client, GL520_REG_IN3_INPUT); 729 730 /* Temp1 and Vin4 are the same input */ 731 if (data->two_temps) { 732 data->temp_input[1] = gl520_read_value(client, GL520_REG_TEMP2_INPUT); 733 data->temp_max[1] = gl520_read_value(client, GL520_REG_TEMP2_MAX); 734 data->temp_max_hyst[1] = gl520_read_value(client, GL520_REG_TEMP2_MAX_HYST); 735 } else { 736 data->in_input[4] = gl520_read_value(client, GL520_REG_IN4_INPUT); 737 data->in_min[4] = gl520_read_value(client, GL520_REG_IN4_MIN); 738 data->in_max[4] = gl520_read_value(client, GL520_REG_IN4_MAX); 739 } 740 741 data->last_updated = jiffies; 742 data->valid = 1; 743 } 744 745 up(&data->update_lock); 746 747 return data; 748 } 749 750 751 static int __init sensors_gl520sm_init(void) 752 { 753 return i2c_add_driver(&gl520_driver); 754 } 755 756 static void __exit sensors_gl520sm_exit(void) 757 { 758 i2c_del_driver(&gl520_driver); 759 } 760 761 762 MODULE_AUTHOR("Frodo Looijaard <frodol@dds.nl>, " 763 "Ky�sti M�lkki <kmalkki@cc.hut.fi>, " 764 "Maarten Deprez <maartendeprez@users.sourceforge.net>"); 765 MODULE_DESCRIPTION("GL520SM driver"); 766 MODULE_LICENSE("GPL"); 767 768 module_init(sensors_gl520sm_init); 769 module_exit(sensors_gl520sm_exit); 770