lm87.c revision ba9c2e8d15da029ea3051c95e446b2d638ef02e2
1/* 2 * lm87.c 3 * 4 * Copyright (C) 2000 Frodo Looijaard <frodol@dds.nl> 5 * Philip Edelbrock <phil@netroedge.com> 6 * Stephen Rousset <stephen.rousset@rocketlogix.com> 7 * Dan Eaton <dan.eaton@rocketlogix.com> 8 * Copyright (C) 2004 Jean Delvare <khali@linux-fr.org> 9 * 10 * Original port to Linux 2.6 by Jeff Oliver. 11 * 12 * The LM87 is a sensor chip made by National Semiconductor. It monitors up 13 * to 8 voltages (including its own power source), up to three temperatures 14 * (its own plus up to two external ones) and up to two fans. The default 15 * configuration is 6 voltages, two temperatures and two fans (see below). 16 * Voltages are scaled internally with ratios such that the nominal value of 17 * each voltage correspond to a register value of 192 (which means a 18 * resolution of about 0.5% of the nominal value). Temperature values are 19 * reported with a 1 deg resolution and a 3-4 deg accuracy. Complete 20 * datasheet can be obtained from National's website at: 21 * http://www.national.com/pf/LM/LM87.html 22 * 23 * Some functions share pins, so not all functions are available at the same 24 * time. Which are depends on the hardware setup. This driver assumes that 25 * the BIOS configured the chip correctly. In that respect, it differs from 26 * the original driver (from lm_sensors for Linux 2.4), which would force the 27 * LM87 to an arbitrary, compile-time chosen mode, regardless of the actual 28 * chipset wiring. 29 * For reference, here is the list of exclusive functions: 30 * - in0+in5 (default) or temp3 31 * - fan1 (default) or in6 32 * - fan2 (default) or in7 33 * - VID lines (default) or IRQ lines (not handled by this driver) 34 * 35 * The LM87 additionally features an analog output, supposedly usable to 36 * control the speed of a fan. All new chips use pulse width modulation 37 * instead. The LM87 is the only hardware monitoring chipset I know of 38 * which uses amplitude modulation. Be careful when using this feature. 39 * 40 * This program is free software; you can redistribute it and/or modify 41 * it under the terms of the GNU General Public License as published by 42 * the Free Software Foundation; either version 2 of the License, or 43 * (at your option) any later version. 44 * 45 * This program is distributed in the hope that it will be useful, 46 * but WITHOUT ANY WARRANTY; without even the implied warranty of 47 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 48 * GNU General Public License for more details. 49 * 50 * You should have received a copy of the GNU General Public License 51 * along with this program; if not, write to the Free Software 52 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 53 */ 54 55#include <linux/module.h> 56#include <linux/init.h> 57#include <linux/slab.h> 58#include <linux/jiffies.h> 59#include <linux/i2c.h> 60#include <linux/hwmon.h> 61#include <linux/hwmon-vid.h> 62#include <linux/err.h> 63 64/* 65 * Addresses to scan 66 * LM87 has three possible addresses: 0x2c, 0x2d and 0x2e. 67 */ 68 69static unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, I2C_CLIENT_END }; 70 71/* 72 * Insmod parameters 73 */ 74 75I2C_CLIENT_INSMOD_1(lm87); 76 77/* 78 * The LM87 registers 79 */ 80 81/* nr in 0..5 */ 82#define LM87_REG_IN(nr) (0x20 + (nr)) 83#define LM87_REG_IN_MAX(nr) (0x2B + (nr) * 2) 84#define LM87_REG_IN_MIN(nr) (0x2C + (nr) * 2) 85/* nr in 0..1 */ 86#define LM87_REG_AIN(nr) (0x28 + (nr)) 87#define LM87_REG_AIN_MIN(nr) (0x1A + (nr)) 88#define LM87_REG_AIN_MAX(nr) (0x3B + (nr)) 89 90static u8 LM87_REG_TEMP[3] = { 0x27, 0x26, 0x20 }; 91static u8 LM87_REG_TEMP_HIGH[3] = { 0x39, 0x37, 0x2B }; 92static u8 LM87_REG_TEMP_LOW[3] = { 0x3A, 0x38, 0x2C }; 93 94#define LM87_REG_TEMP_HW_INT_LOCK 0x13 95#define LM87_REG_TEMP_HW_EXT_LOCK 0x14 96#define LM87_REG_TEMP_HW_INT 0x17 97#define LM87_REG_TEMP_HW_EXT 0x18 98 99/* nr in 0..1 */ 100#define LM87_REG_FAN(nr) (0x28 + (nr)) 101#define LM87_REG_FAN_MIN(nr) (0x3B + (nr)) 102#define LM87_REG_AOUT 0x19 103 104#define LM87_REG_CONFIG 0x40 105#define LM87_REG_CHANNEL_MODE 0x16 106#define LM87_REG_VID_FAN_DIV 0x47 107#define LM87_REG_VID4 0x49 108 109#define LM87_REG_ALARMS1 0x41 110#define LM87_REG_ALARMS2 0x42 111 112#define LM87_REG_COMPANY_ID 0x3E 113#define LM87_REG_REVISION 0x3F 114 115/* 116 * Conversions and various macros 117 * The LM87 uses signed 8-bit values for temperatures. 118 */ 119 120#define IN_FROM_REG(reg,scale) (((reg) * (scale) + 96) / 192) 121#define IN_TO_REG(val,scale) ((val) <= 0 ? 0 : \ 122 (val) * 192 >= (scale) * 255 ? 255 : \ 123 ((val) * 192 + (scale)/2) / (scale)) 124 125#define TEMP_FROM_REG(reg) ((reg) * 1000) 126#define TEMP_TO_REG(val) ((val) <= -127500 ? -128 : \ 127 (val) >= 126500 ? 127 : \ 128 (((val) < 0 ? (val)-500 : (val)+500) / 1000)) 129 130#define FAN_FROM_REG(reg,div) ((reg) == 255 || (reg) == 0 ? 0 : \ 131 1350000 + (reg)*(div) / 2) / ((reg)*(div)) 132#define FAN_TO_REG(val,div) ((val)*(div) * 255 <= 1350000 ? 255 : \ 133 (1350000 + (val)*(div) / 2) / ((val)*(div))) 134 135#define FAN_DIV_FROM_REG(reg) (1 << (reg)) 136 137/* analog out is 9.80mV/LSB */ 138#define AOUT_FROM_REG(reg) (((reg) * 98 + 5) / 10) 139#define AOUT_TO_REG(val) ((val) <= 0 ? 0 : \ 140 (val) >= 2500 ? 255 : \ 141 ((val) * 10 + 49) / 98) 142 143/* nr in 0..1 */ 144#define CHAN_NO_FAN(nr) (1 << (nr)) 145#define CHAN_TEMP3 (1 << 2) 146#define CHAN_VCC_5V (1 << 3) 147#define CHAN_NO_VID (1 << 8) 148 149/* 150 * Functions declaration 151 */ 152 153static int lm87_attach_adapter(struct i2c_adapter *adapter); 154static int lm87_detect(struct i2c_adapter *adapter, int address, int kind); 155static void lm87_init_client(struct i2c_client *client); 156static int lm87_detach_client(struct i2c_client *client); 157static struct lm87_data *lm87_update_device(struct device *dev); 158 159/* 160 * Driver data (common to all clients) 161 */ 162 163static struct i2c_driver lm87_driver = { 164 .owner = THIS_MODULE, 165 .name = "lm87", 166 .id = I2C_DRIVERID_LM87, 167 .flags = I2C_DF_NOTIFY, 168 .attach_adapter = lm87_attach_adapter, 169 .detach_client = lm87_detach_client, 170}; 171 172/* 173 * Client data (each client gets its own) 174 */ 175 176struct lm87_data { 177 struct i2c_client client; 178 struct class_device *class_dev; 179 struct semaphore update_lock; 180 char valid; /* zero until following fields are valid */ 181 unsigned long last_updated; /* In jiffies */ 182 183 u8 channel; /* register value */ 184 185 u8 in[8]; /* register value */ 186 u8 in_max[8]; /* register value */ 187 u8 in_min[8]; /* register value */ 188 u16 in_scale[8]; 189 190 s8 temp[3]; /* register value */ 191 s8 temp_high[3]; /* register value */ 192 s8 temp_low[3]; /* register value */ 193 s8 temp_crit_int; /* min of two register values */ 194 s8 temp_crit_ext; /* min of two register values */ 195 196 u8 fan[2]; /* register value */ 197 u8 fan_min[2]; /* register value */ 198 u8 fan_div[2]; /* register value, shifted right */ 199 u8 aout; /* register value */ 200 201 u16 alarms; /* register values, combined */ 202 u8 vid; /* register values, combined */ 203 u8 vrm; 204}; 205 206/* 207 * Sysfs stuff 208 */ 209 210static inline int lm87_read_value(struct i2c_client *client, u8 reg) 211{ 212 return i2c_smbus_read_byte_data(client, reg); 213} 214 215static inline int lm87_write_value(struct i2c_client *client, u8 reg, u8 value) 216{ 217 return i2c_smbus_write_byte_data(client, reg, value); 218} 219 220#define show_in(offset) \ 221static ssize_t show_in##offset##_input(struct device *dev, struct device_attribute *attr, char *buf) \ 222{ \ 223 struct lm87_data *data = lm87_update_device(dev); \ 224 return sprintf(buf, "%u\n", IN_FROM_REG(data->in[offset], \ 225 data->in_scale[offset])); \ 226} \ 227static ssize_t show_in##offset##_min(struct device *dev, struct device_attribute *attr, char *buf) \ 228{ \ 229 struct lm87_data *data = lm87_update_device(dev); \ 230 return sprintf(buf, "%u\n", IN_FROM_REG(data->in_min[offset], \ 231 data->in_scale[offset])); \ 232} \ 233static ssize_t show_in##offset##_max(struct device *dev, struct device_attribute *attr, char *buf) \ 234{ \ 235 struct lm87_data *data = lm87_update_device(dev); \ 236 return sprintf(buf, "%u\n", IN_FROM_REG(data->in_max[offset], \ 237 data->in_scale[offset])); \ 238} \ 239static DEVICE_ATTR(in##offset##_input, S_IRUGO, \ 240 show_in##offset##_input, NULL); 241show_in(0); 242show_in(1); 243show_in(2); 244show_in(3); 245show_in(4); 246show_in(5); 247show_in(6); 248show_in(7); 249 250static void set_in_min(struct device *dev, const char *buf, int nr) 251{ 252 struct i2c_client *client = to_i2c_client(dev); 253 struct lm87_data *data = i2c_get_clientdata(client); 254 long val = simple_strtol(buf, NULL, 10); 255 256 down(&data->update_lock); 257 data->in_min[nr] = IN_TO_REG(val, data->in_scale[nr]); 258 lm87_write_value(client, nr<6 ? LM87_REG_IN_MIN(nr) : 259 LM87_REG_AIN_MIN(nr-6), data->in_min[nr]); 260 up(&data->update_lock); 261} 262 263static void set_in_max(struct device *dev, const char *buf, int nr) 264{ 265 struct i2c_client *client = to_i2c_client(dev); 266 struct lm87_data *data = i2c_get_clientdata(client); 267 long val = simple_strtol(buf, NULL, 10); 268 269 down(&data->update_lock); 270 data->in_max[nr] = IN_TO_REG(val, data->in_scale[nr]); 271 lm87_write_value(client, nr<6 ? LM87_REG_IN_MAX(nr) : 272 LM87_REG_AIN_MAX(nr-6), data->in_max[nr]); 273 up(&data->update_lock); 274} 275 276#define set_in(offset) \ 277static ssize_t set_in##offset##_min(struct device *dev, struct device_attribute *attr, \ 278 const char *buf, size_t count) \ 279{ \ 280 set_in_min(dev, buf, offset); \ 281 return count; \ 282} \ 283static ssize_t set_in##offset##_max(struct device *dev, struct device_attribute *attr, \ 284 const char *buf, size_t count) \ 285{ \ 286 set_in_max(dev, buf, offset); \ 287 return count; \ 288} \ 289static DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \ 290 show_in##offset##_min, set_in##offset##_min); \ 291static DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \ 292 show_in##offset##_max, set_in##offset##_max); 293set_in(0); 294set_in(1); 295set_in(2); 296set_in(3); 297set_in(4); 298set_in(5); 299set_in(6); 300set_in(7); 301 302#define show_temp(offset) \ 303static ssize_t show_temp##offset##_input(struct device *dev, struct device_attribute *attr, char *buf) \ 304{ \ 305 struct lm87_data *data = lm87_update_device(dev); \ 306 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[offset-1])); \ 307} \ 308static ssize_t show_temp##offset##_low(struct device *dev, struct device_attribute *attr, char *buf) \ 309{ \ 310 struct lm87_data *data = lm87_update_device(dev); \ 311 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_low[offset-1])); \ 312} \ 313static ssize_t show_temp##offset##_high(struct device *dev, struct device_attribute *attr, char *buf) \ 314{ \ 315 struct lm87_data *data = lm87_update_device(dev); \ 316 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_high[offset-1])); \ 317}\ 318static DEVICE_ATTR(temp##offset##_input, S_IRUGO, \ 319 show_temp##offset##_input, NULL); 320show_temp(1); 321show_temp(2); 322show_temp(3); 323 324static void set_temp_low(struct device *dev, const char *buf, int nr) 325{ 326 struct i2c_client *client = to_i2c_client(dev); 327 struct lm87_data *data = i2c_get_clientdata(client); 328 long val = simple_strtol(buf, NULL, 10); 329 330 down(&data->update_lock); 331 data->temp_low[nr] = TEMP_TO_REG(val); 332 lm87_write_value(client, LM87_REG_TEMP_LOW[nr], data->temp_low[nr]); 333 up(&data->update_lock); 334} 335 336static void set_temp_high(struct device *dev, const char *buf, int nr) 337{ 338 struct i2c_client *client = to_i2c_client(dev); 339 struct lm87_data *data = i2c_get_clientdata(client); 340 long val = simple_strtol(buf, NULL, 10); 341 342 down(&data->update_lock); 343 data->temp_high[nr] = TEMP_TO_REG(val); 344 lm87_write_value(client, LM87_REG_TEMP_HIGH[nr], data->temp_high[nr]); 345 up(&data->update_lock); 346} 347 348#define set_temp(offset) \ 349static ssize_t set_temp##offset##_low(struct device *dev, struct device_attribute *attr, \ 350 const char *buf, size_t count) \ 351{ \ 352 set_temp_low(dev, buf, offset-1); \ 353 return count; \ 354} \ 355static ssize_t set_temp##offset##_high(struct device *dev, struct device_attribute *attr, \ 356 const char *buf, size_t count) \ 357{ \ 358 set_temp_high(dev, buf, offset-1); \ 359 return count; \ 360} \ 361static DEVICE_ATTR(temp##offset##_max, S_IRUGO | S_IWUSR, \ 362 show_temp##offset##_high, set_temp##offset##_high); \ 363static DEVICE_ATTR(temp##offset##_min, S_IRUGO | S_IWUSR, \ 364 show_temp##offset##_low, set_temp##offset##_low); 365set_temp(1); 366set_temp(2); 367set_temp(3); 368 369static ssize_t show_temp_crit_int(struct device *dev, struct device_attribute *attr, char *buf) 370{ 371 struct lm87_data *data = lm87_update_device(dev); 372 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_crit_int)); 373} 374 375static ssize_t show_temp_crit_ext(struct device *dev, struct device_attribute *attr, char *buf) 376{ 377 struct lm87_data *data = lm87_update_device(dev); 378 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_crit_ext)); 379} 380 381static DEVICE_ATTR(temp1_crit, S_IRUGO, show_temp_crit_int, NULL); 382static DEVICE_ATTR(temp2_crit, S_IRUGO, show_temp_crit_ext, NULL); 383static DEVICE_ATTR(temp3_crit, S_IRUGO, show_temp_crit_ext, NULL); 384 385#define show_fan(offset) \ 386static ssize_t show_fan##offset##_input(struct device *dev, struct device_attribute *attr, char *buf) \ 387{ \ 388 struct lm87_data *data = lm87_update_device(dev); \ 389 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[offset-1], \ 390 FAN_DIV_FROM_REG(data->fan_div[offset-1]))); \ 391} \ 392static ssize_t show_fan##offset##_min(struct device *dev, struct device_attribute *attr, char *buf) \ 393{ \ 394 struct lm87_data *data = lm87_update_device(dev); \ 395 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[offset-1], \ 396 FAN_DIV_FROM_REG(data->fan_div[offset-1]))); \ 397} \ 398static ssize_t show_fan##offset##_div(struct device *dev, struct device_attribute *attr, char *buf) \ 399{ \ 400 struct lm87_data *data = lm87_update_device(dev); \ 401 return sprintf(buf, "%d\n", FAN_DIV_FROM_REG(data->fan_div[offset-1])); \ 402} \ 403static DEVICE_ATTR(fan##offset##_input, S_IRUGO, \ 404 show_fan##offset##_input, NULL); 405show_fan(1); 406show_fan(2); 407 408static void set_fan_min(struct device *dev, const char *buf, int nr) 409{ 410 struct i2c_client *client = to_i2c_client(dev); 411 struct lm87_data *data = i2c_get_clientdata(client); 412 long val = simple_strtol(buf, NULL, 10); 413 414 down(&data->update_lock); 415 data->fan_min[nr] = FAN_TO_REG(val, 416 FAN_DIV_FROM_REG(data->fan_div[nr])); 417 lm87_write_value(client, LM87_REG_FAN_MIN(nr), data->fan_min[nr]); 418 up(&data->update_lock); 419} 420 421/* Note: we save and restore the fan minimum here, because its value is 422 determined in part by the fan clock divider. This follows the principle 423 of least suprise; the user doesn't expect the fan minimum to change just 424 because the divider changed. */ 425static ssize_t set_fan_div(struct device *dev, const char *buf, 426 size_t count, int nr) 427{ 428 struct i2c_client *client = to_i2c_client(dev); 429 struct lm87_data *data = i2c_get_clientdata(client); 430 long val = simple_strtol(buf, NULL, 10); 431 unsigned long min; 432 u8 reg; 433 434 down(&data->update_lock); 435 min = FAN_FROM_REG(data->fan_min[nr], 436 FAN_DIV_FROM_REG(data->fan_div[nr])); 437 438 switch (val) { 439 case 1: data->fan_div[nr] = 0; break; 440 case 2: data->fan_div[nr] = 1; break; 441 case 4: data->fan_div[nr] = 2; break; 442 case 8: data->fan_div[nr] = 3; break; 443 default: 444 up(&data->update_lock); 445 return -EINVAL; 446 } 447 448 reg = lm87_read_value(client, LM87_REG_VID_FAN_DIV); 449 switch (nr) { 450 case 0: 451 reg = (reg & 0xCF) | (data->fan_div[0] << 4); 452 break; 453 case 1: 454 reg = (reg & 0x3F) | (data->fan_div[1] << 6); 455 break; 456 } 457 lm87_write_value(client, LM87_REG_VID_FAN_DIV, reg); 458 459 data->fan_min[nr] = FAN_TO_REG(min, val); 460 lm87_write_value(client, LM87_REG_FAN_MIN(nr), 461 data->fan_min[nr]); 462 up(&data->update_lock); 463 464 return count; 465} 466 467#define set_fan(offset) \ 468static ssize_t set_fan##offset##_min(struct device *dev, struct device_attribute *attr, const char *buf, \ 469 size_t count) \ 470{ \ 471 set_fan_min(dev, buf, offset-1); \ 472 return count; \ 473} \ 474static ssize_t set_fan##offset##_div(struct device *dev, struct device_attribute *attr, const char *buf, \ 475 size_t count) \ 476{ \ 477 return set_fan_div(dev, buf, count, offset-1); \ 478} \ 479static DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \ 480 show_fan##offset##_min, set_fan##offset##_min); \ 481static DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR, \ 482 show_fan##offset##_div, set_fan##offset##_div); 483set_fan(1); 484set_fan(2); 485 486static ssize_t show_alarms(struct device *dev, struct device_attribute *attr, char *buf) 487{ 488 struct lm87_data *data = lm87_update_device(dev); 489 return sprintf(buf, "%d\n", data->alarms); 490} 491static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL); 492 493static ssize_t show_vid(struct device *dev, struct device_attribute *attr, char *buf) 494{ 495 struct lm87_data *data = lm87_update_device(dev); 496 return sprintf(buf, "%d\n", vid_from_reg(data->vid, data->vrm)); 497} 498static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid, NULL); 499 500static ssize_t show_vrm(struct device *dev, struct device_attribute *attr, char *buf) 501{ 502 struct lm87_data *data = lm87_update_device(dev); 503 return sprintf(buf, "%d\n", data->vrm); 504} 505static ssize_t set_vrm(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) 506{ 507 struct i2c_client *client = to_i2c_client(dev); 508 struct lm87_data *data = i2c_get_clientdata(client); 509 data->vrm = simple_strtoul(buf, NULL, 10); 510 return count; 511} 512static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm, set_vrm); 513 514static ssize_t show_aout(struct device *dev, struct device_attribute *attr, char *buf) 515{ 516 struct lm87_data *data = lm87_update_device(dev); 517 return sprintf(buf, "%d\n", AOUT_FROM_REG(data->aout)); 518} 519static ssize_t set_aout(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) 520{ 521 struct i2c_client *client = to_i2c_client(dev); 522 struct lm87_data *data = i2c_get_clientdata(client); 523 long val = simple_strtol(buf, NULL, 10); 524 525 down(&data->update_lock); 526 data->aout = AOUT_TO_REG(val); 527 lm87_write_value(client, LM87_REG_AOUT, data->aout); 528 up(&data->update_lock); 529 return count; 530} 531static DEVICE_ATTR(aout_output, S_IRUGO | S_IWUSR, show_aout, set_aout); 532 533/* 534 * Real code 535 */ 536 537static int lm87_attach_adapter(struct i2c_adapter *adapter) 538{ 539 if (!(adapter->class & I2C_CLASS_HWMON)) 540 return 0; 541 return i2c_probe(adapter, &addr_data, lm87_detect); 542} 543 544/* 545 * The following function does more than just detection. If detection 546 * succeeds, it also registers the new chip. 547 */ 548static int lm87_detect(struct i2c_adapter *adapter, int address, int kind) 549{ 550 struct i2c_client *new_client; 551 struct lm87_data *data; 552 int err = 0; 553 554 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) 555 goto exit; 556 557 if (!(data = kzalloc(sizeof(struct lm87_data), GFP_KERNEL))) { 558 err = -ENOMEM; 559 goto exit; 560 } 561 562 /* The common I2C client data is placed right before the 563 LM87-specific data. */ 564 new_client = &data->client; 565 i2c_set_clientdata(new_client, data); 566 new_client->addr = address; 567 new_client->adapter = adapter; 568 new_client->driver = &lm87_driver; 569 new_client->flags = 0; 570 571 /* Default to an LM87 if forced */ 572 if (kind == 0) 573 kind = lm87; 574 575 /* Now, we do the remaining detection. */ 576 if (kind < 0) { 577 u8 rev = lm87_read_value(new_client, LM87_REG_REVISION); 578 579 if (rev < 0x01 || rev > 0x08 580 || (lm87_read_value(new_client, LM87_REG_CONFIG) & 0x80) 581 || lm87_read_value(new_client, LM87_REG_COMPANY_ID) != 0x02) { 582 dev_dbg(&adapter->dev, 583 "LM87 detection failed at 0x%02x.\n", 584 address); 585 goto exit_free; 586 } 587 } 588 589 /* We can fill in the remaining client fields */ 590 strlcpy(new_client->name, "lm87", I2C_NAME_SIZE); 591 data->valid = 0; 592 init_MUTEX(&data->update_lock); 593 594 /* Tell the I2C layer a new client has arrived */ 595 if ((err = i2c_attach_client(new_client))) 596 goto exit_free; 597 598 /* Initialize the LM87 chip */ 599 lm87_init_client(new_client); 600 601 data->in_scale[0] = 2500; 602 data->in_scale[1] = 2700; 603 data->in_scale[2] = (data->channel & CHAN_VCC_5V) ? 5000 : 3300; 604 data->in_scale[3] = 5000; 605 data->in_scale[4] = 12000; 606 data->in_scale[5] = 2700; 607 data->in_scale[6] = 1875; 608 data->in_scale[7] = 1875; 609 610 /* Register sysfs hooks */ 611 data->class_dev = hwmon_device_register(&new_client->dev); 612 if (IS_ERR(data->class_dev)) { 613 err = PTR_ERR(data->class_dev); 614 goto exit_detach; 615 } 616 617 device_create_file(&new_client->dev, &dev_attr_in1_input); 618 device_create_file(&new_client->dev, &dev_attr_in1_min); 619 device_create_file(&new_client->dev, &dev_attr_in1_max); 620 device_create_file(&new_client->dev, &dev_attr_in2_input); 621 device_create_file(&new_client->dev, &dev_attr_in2_min); 622 device_create_file(&new_client->dev, &dev_attr_in2_max); 623 device_create_file(&new_client->dev, &dev_attr_in3_input); 624 device_create_file(&new_client->dev, &dev_attr_in3_min); 625 device_create_file(&new_client->dev, &dev_attr_in3_max); 626 device_create_file(&new_client->dev, &dev_attr_in4_input); 627 device_create_file(&new_client->dev, &dev_attr_in4_min); 628 device_create_file(&new_client->dev, &dev_attr_in4_max); 629 630 if (data->channel & CHAN_NO_FAN(0)) { 631 device_create_file(&new_client->dev, &dev_attr_in6_input); 632 device_create_file(&new_client->dev, &dev_attr_in6_min); 633 device_create_file(&new_client->dev, &dev_attr_in6_max); 634 } else { 635 device_create_file(&new_client->dev, &dev_attr_fan1_input); 636 device_create_file(&new_client->dev, &dev_attr_fan1_min); 637 device_create_file(&new_client->dev, &dev_attr_fan1_div); 638 } 639 if (data->channel & CHAN_NO_FAN(1)) { 640 device_create_file(&new_client->dev, &dev_attr_in7_input); 641 device_create_file(&new_client->dev, &dev_attr_in7_min); 642 device_create_file(&new_client->dev, &dev_attr_in7_max); 643 } else { 644 device_create_file(&new_client->dev, &dev_attr_fan2_input); 645 device_create_file(&new_client->dev, &dev_attr_fan2_min); 646 device_create_file(&new_client->dev, &dev_attr_fan2_div); 647 } 648 649 device_create_file(&new_client->dev, &dev_attr_temp1_input); 650 device_create_file(&new_client->dev, &dev_attr_temp1_max); 651 device_create_file(&new_client->dev, &dev_attr_temp1_min); 652 device_create_file(&new_client->dev, &dev_attr_temp1_crit); 653 device_create_file(&new_client->dev, &dev_attr_temp2_input); 654 device_create_file(&new_client->dev, &dev_attr_temp2_max); 655 device_create_file(&new_client->dev, &dev_attr_temp2_min); 656 device_create_file(&new_client->dev, &dev_attr_temp2_crit); 657 658 if (data->channel & CHAN_TEMP3) { 659 device_create_file(&new_client->dev, &dev_attr_temp3_input); 660 device_create_file(&new_client->dev, &dev_attr_temp3_max); 661 device_create_file(&new_client->dev, &dev_attr_temp3_min); 662 device_create_file(&new_client->dev, &dev_attr_temp3_crit); 663 } else { 664 device_create_file(&new_client->dev, &dev_attr_in0_input); 665 device_create_file(&new_client->dev, &dev_attr_in0_min); 666 device_create_file(&new_client->dev, &dev_attr_in0_max); 667 device_create_file(&new_client->dev, &dev_attr_in5_input); 668 device_create_file(&new_client->dev, &dev_attr_in5_min); 669 device_create_file(&new_client->dev, &dev_attr_in5_max); 670 } 671 672 if (!(data->channel & CHAN_NO_VID)) { 673 device_create_file(&new_client->dev, &dev_attr_cpu0_vid); 674 device_create_file(&new_client->dev, &dev_attr_vrm); 675 } 676 677 device_create_file(&new_client->dev, &dev_attr_alarms); 678 device_create_file(&new_client->dev, &dev_attr_aout_output); 679 680 return 0; 681 682exit_detach: 683 i2c_detach_client(new_client); 684exit_free: 685 kfree(data); 686exit: 687 return err; 688} 689 690static void lm87_init_client(struct i2c_client *client) 691{ 692 struct lm87_data *data = i2c_get_clientdata(client); 693 u8 config; 694 695 data->channel = lm87_read_value(client, LM87_REG_CHANNEL_MODE); 696 data->vrm = vid_which_vrm(); 697 698 config = lm87_read_value(client, LM87_REG_CONFIG); 699 if (!(config & 0x01)) { 700 int i; 701 702 /* Limits are left uninitialized after power-up */ 703 for (i = 1; i < 6; i++) { 704 lm87_write_value(client, LM87_REG_IN_MIN(i), 0x00); 705 lm87_write_value(client, LM87_REG_IN_MAX(i), 0xFF); 706 } 707 for (i = 0; i < 2; i++) { 708 lm87_write_value(client, LM87_REG_TEMP_HIGH[i], 0x7F); 709 lm87_write_value(client, LM87_REG_TEMP_LOW[i], 0x00); 710 lm87_write_value(client, LM87_REG_AIN_MIN(i), 0x00); 711 lm87_write_value(client, LM87_REG_AIN_MAX(i), 0xFF); 712 } 713 if (data->channel & CHAN_TEMP3) { 714 lm87_write_value(client, LM87_REG_TEMP_HIGH[2], 0x7F); 715 lm87_write_value(client, LM87_REG_TEMP_LOW[2], 0x00); 716 } else { 717 lm87_write_value(client, LM87_REG_IN_MIN(0), 0x00); 718 lm87_write_value(client, LM87_REG_IN_MAX(0), 0xFF); 719 } 720 } 721 if ((config & 0x81) != 0x01) { 722 /* Start monitoring */ 723 lm87_write_value(client, LM87_REG_CONFIG, 724 (config & 0xF7) | 0x01); 725 } 726} 727 728static int lm87_detach_client(struct i2c_client *client) 729{ 730 struct lm87_data *data = i2c_get_clientdata(client); 731 int err; 732 733 hwmon_device_unregister(data->class_dev); 734 735 if ((err = i2c_detach_client(client))) 736 return err; 737 738 kfree(data); 739 return 0; 740} 741 742static struct lm87_data *lm87_update_device(struct device *dev) 743{ 744 struct i2c_client *client = to_i2c_client(dev); 745 struct lm87_data *data = i2c_get_clientdata(client); 746 747 down(&data->update_lock); 748 749 if (time_after(jiffies, data->last_updated + HZ) || !data->valid) { 750 int i, j; 751 752 dev_dbg(&client->dev, "Updating data.\n"); 753 754 i = (data->channel & CHAN_TEMP3) ? 1 : 0; 755 j = (data->channel & CHAN_TEMP3) ? 5 : 6; 756 for (; i < j; i++) { 757 data->in[i] = lm87_read_value(client, 758 LM87_REG_IN(i)); 759 data->in_min[i] = lm87_read_value(client, 760 LM87_REG_IN_MIN(i)); 761 data->in_max[i] = lm87_read_value(client, 762 LM87_REG_IN_MAX(i)); 763 } 764 765 for (i = 0; i < 2; i++) { 766 if (data->channel & CHAN_NO_FAN(i)) { 767 data->in[6+i] = lm87_read_value(client, 768 LM87_REG_AIN(i)); 769 data->in_max[6+i] = lm87_read_value(client, 770 LM87_REG_AIN_MAX(i)); 771 data->in_min[6+i] = lm87_read_value(client, 772 LM87_REG_AIN_MIN(i)); 773 774 } else { 775 data->fan[i] = lm87_read_value(client, 776 LM87_REG_FAN(i)); 777 data->fan_min[i] = lm87_read_value(client, 778 LM87_REG_FAN_MIN(i)); 779 } 780 } 781 782 j = (data->channel & CHAN_TEMP3) ? 3 : 2; 783 for (i = 0 ; i < j; i++) { 784 data->temp[i] = lm87_read_value(client, 785 LM87_REG_TEMP[i]); 786 data->temp_high[i] = lm87_read_value(client, 787 LM87_REG_TEMP_HIGH[i]); 788 data->temp_low[i] = lm87_read_value(client, 789 LM87_REG_TEMP_LOW[i]); 790 } 791 792 i = lm87_read_value(client, LM87_REG_TEMP_HW_INT_LOCK); 793 j = lm87_read_value(client, LM87_REG_TEMP_HW_INT); 794 data->temp_crit_int = min(i, j); 795 796 i = lm87_read_value(client, LM87_REG_TEMP_HW_EXT_LOCK); 797 j = lm87_read_value(client, LM87_REG_TEMP_HW_EXT); 798 data->temp_crit_ext = min(i, j); 799 800 i = lm87_read_value(client, LM87_REG_VID_FAN_DIV); 801 data->fan_div[0] = (i >> 4) & 0x03; 802 data->fan_div[1] = (i >> 6) & 0x03; 803 data->vid = (i & 0x0F) 804 | (lm87_read_value(client, LM87_REG_VID4) & 0x01) 805 << 4; 806 807 data->alarms = lm87_read_value(client, LM87_REG_ALARMS1) 808 | (lm87_read_value(client, LM87_REG_ALARMS2) 809 << 8); 810 data->aout = lm87_read_value(client, LM87_REG_AOUT); 811 812 data->last_updated = jiffies; 813 data->valid = 1; 814 } 815 816 up(&data->update_lock); 817 818 return data; 819} 820 821static int __init sensors_lm87_init(void) 822{ 823 return i2c_add_driver(&lm87_driver); 824} 825 826static void __exit sensors_lm87_exit(void) 827{ 828 i2c_del_driver(&lm87_driver); 829} 830 831MODULE_AUTHOR("Jean Delvare <khali@linux-fr.org> and others"); 832MODULE_DESCRIPTION("LM87 driver"); 833MODULE_LICENSE("GPL"); 834 835module_init(sensors_lm87_init); 836module_exit(sensors_lm87_exit); 837