1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * nct6683 - Driver for the hardware monitoring functionality of 4 * Nuvoton NCT6683D/NCT6686D/NCT6687D eSIO 5 * 6 * Copyright (C) 2013 Guenter Roeck <linux@roeck-us.net> 7 * 8 * Derived from nct6775 driver 9 * Copyright (C) 2012, 2013 Guenter Roeck <linux@roeck-us.net> 10 * 11 * Supports the following chips: 12 * 13 * Chip #vin #fan #pwm #temp chip ID 14 * nct6683d 21(1) 16 8 32(1) 0xc730 15 * nct6686d 21(1) 16 8 32(1) 0xd440 16 * nct6687d 21(1) 16 8 32(1) 0xd590 17 * 18 * Notes: 19 * (1) Total number of vin and temp inputs is 32. 20 */ 21 22 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 23 24 #include <linux/acpi.h> 25 #include <linux/delay.h> 26 #include <linux/err.h> 27 #include <linux/init.h> 28 #include <linux/io.h> 29 #include <linux/jiffies.h> 30 #include <linux/hwmon.h> 31 #include <linux/hwmon-sysfs.h> 32 #include <linux/module.h> 33 #include <linux/mutex.h> 34 #include <linux/platform_device.h> 35 #include <linux/slab.h> 36 37 enum kinds { nct6683, nct6686, nct6687 }; 38 39 static bool force; 40 module_param(force, bool, 0); 41 MODULE_PARM_DESC(force, "Set to one to enable support for unknown vendors"); 42 43 static const char * const nct6683_device_names[] = { 44 "nct6683", 45 "nct6686", 46 "nct6687", 47 }; 48 49 static const char * const nct6683_chip_names[] = { 50 "NCT6683D", 51 "NCT6686D", 52 "NCT6687D", 53 }; 54 55 #define DRVNAME "nct6683" 56 57 /* 58 * Super-I/O constants and functions 59 */ 60 61 #define NCT6683_LD_ACPI 0x0a 62 #define NCT6683_LD_HWM 0x0b 63 #define NCT6683_LD_VID 0x0d 64 65 #define SIO_REG_LDSEL 0x07 /* Logical device select */ 66 #define SIO_REG_DEVID 0x20 /* Device ID (2 bytes) */ 67 #define SIO_REG_ENABLE 0x30 /* Logical device enable */ 68 #define SIO_REG_ADDR 0x60 /* Logical device address (2 bytes) */ 69 70 #define SIO_NCT6681_ID 0xb270 /* for later */ 71 #define SIO_NCT6683_ID 0xc730 72 #define SIO_NCT6686_ID 0xd440 73 #define SIO_NCT6687_ID 0xd590 74 #define SIO_ID_MASK 0xFFF0 75 76 static inline void 77 superio_outb(int ioreg, int reg, int val) 78 { 79 outb(reg, ioreg); 80 outb(val, ioreg + 1); 81 } 82 83 static inline int 84 superio_inb(int ioreg, int reg) 85 { 86 outb(reg, ioreg); 87 return inb(ioreg + 1); 88 } 89 90 static inline void 91 superio_select(int ioreg, int ld) 92 { 93 outb(SIO_REG_LDSEL, ioreg); 94 outb(ld, ioreg + 1); 95 } 96 97 static inline int 98 superio_enter(int ioreg) 99 { 100 /* 101 * Try to reserve <ioreg> and <ioreg + 1> for exclusive access. 102 */ 103 if (!request_muxed_region(ioreg, 2, DRVNAME)) 104 return -EBUSY; 105 106 outb(0x87, ioreg); 107 outb(0x87, ioreg); 108 109 return 0; 110 } 111 112 static inline void 113 superio_exit(int ioreg) 114 { 115 outb(0xaa, ioreg); 116 outb(0x02, ioreg); 117 outb(0x02, ioreg + 1); 118 release_region(ioreg, 2); 119 } 120 121 /* 122 * ISA constants 123 */ 124 125 #define IOREGION_ALIGNMENT (~7) 126 #define IOREGION_OFFSET 4 /* Use EC port 1 */ 127 #define IOREGION_LENGTH 4 128 129 #define EC_PAGE_REG 0 130 #define EC_INDEX_REG 1 131 #define EC_DATA_REG 2 132 #define EC_EVENT_REG 3 133 134 /* Common and NCT6683 specific data */ 135 136 #define NCT6683_NUM_REG_MON 32 137 #define NCT6683_NUM_REG_FAN 16 138 #define NCT6683_NUM_REG_PWM 8 139 140 #define NCT6683_REG_MON(x) (0x100 + (x) * 2) 141 #define NCT6683_REG_FAN_RPM(x) (0x140 + (x) * 2) 142 #define NCT6683_REG_PWM(x) (0x160 + (x)) 143 #define NCT6683_REG_PWM_WRITE(x) (0xa28 + (x)) 144 145 #define NCT6683_REG_MON_STS(x) (0x174 + (x)) 146 #define NCT6683_REG_IDLE(x) (0x178 + (x)) 147 148 #define NCT6683_REG_FAN_STS(x) (0x17c + (x)) 149 #define NCT6683_REG_FAN_ERRSTS 0x17e 150 #define NCT6683_REG_FAN_INITSTS 0x17f 151 152 #define NCT6683_HWM_CFG 0x180 153 154 #define NCT6683_REG_MON_CFG(x) (0x1a0 + (x)) 155 #define NCT6683_REG_FANIN_CFG(x) (0x1c0 + (x)) 156 #define NCT6683_REG_FANOUT_CFG(x) (0x1d0 + (x)) 157 158 #define NCT6683_REG_INTEL_TEMP_MAX(x) (0x901 + (x) * 16) 159 #define NCT6683_REG_INTEL_TEMP_CRIT(x) (0x90d + (x) * 16) 160 161 #define NCT6683_REG_TEMP_HYST(x) (0x330 + (x)) /* 8 bit */ 162 #define NCT6683_REG_TEMP_MAX(x) (0x350 + (x)) /* 8 bit */ 163 #define NCT6683_REG_MON_HIGH(x) (0x370 + (x) * 2) /* 8 bit */ 164 #define NCT6683_REG_MON_LOW(x) (0x371 + (x) * 2) /* 8 bit */ 165 166 #define NCT6683_REG_FAN_MIN(x) (0x3b8 + (x) * 2) /* 16 bit */ 167 168 #define NCT6683_REG_FAN_CFG_CTRL 0xa01 169 #define NCT6683_FAN_CFG_REQ 0x80 170 #define NCT6683_FAN_CFG_DONE 0x40 171 172 #define NCT6683_REG_CUSTOMER_ID 0x602 173 #define NCT6683_CUSTOMER_ID_INTEL 0x805 174 #define NCT6683_CUSTOMER_ID_MITAC 0xa0e 175 #define NCT6683_CUSTOMER_ID_MSI 0x201 176 #define NCT6683_CUSTOMER_ID_MSI2 0x200 177 #define NCT6683_CUSTOMER_ID_MSI3 0x207 178 #define NCT6683_CUSTOMER_ID_MSI4 0x20d 179 #define NCT6683_CUSTOMER_ID_ASROCK 0xe2c 180 #define NCT6683_CUSTOMER_ID_ASROCK2 0xe1b 181 #define NCT6683_CUSTOMER_ID_ASROCK3 0x1631 182 #define NCT6683_CUSTOMER_ID_ASROCK4 0x163e 183 184 #define NCT6683_REG_BUILD_YEAR 0x604 185 #define NCT6683_REG_BUILD_MONTH 0x605 186 #define NCT6683_REG_BUILD_DAY 0x606 187 #define NCT6683_REG_SERIAL 0x607 188 #define NCT6683_REG_VERSION_HI 0x608 189 #define NCT6683_REG_VERSION_LO 0x609 190 191 #define NCT6683_REG_CR_CASEOPEN 0xe8 192 #define NCT6683_CR_CASEOPEN_MASK (1 << 7) 193 194 #define NCT6683_REG_CR_BEEP 0xe0 195 #define NCT6683_CR_BEEP_MASK (1 << 6) 196 197 static const char *const nct6683_mon_label[] = { 198 NULL, /* disabled */ 199 "Local", 200 "Diode 0 (curr)", 201 "Diode 1 (curr)", 202 "Diode 2 (curr)", 203 "Diode 0 (volt)", 204 "Diode 1 (volt)", 205 "Diode 2 (volt)", 206 "Thermistor 14", 207 "Thermistor 15", 208 "Thermistor 16", 209 "Thermistor 0", 210 "Thermistor 1", 211 "Thermistor 2", 212 "Thermistor 3", 213 "Thermistor 4", 214 "Thermistor 5", /* 0x10 */ 215 "Thermistor 6", 216 "Thermistor 7", 217 "Thermistor 8", 218 "Thermistor 9", 219 "Thermistor 10", 220 "Thermistor 11", 221 "Thermistor 12", 222 "Thermistor 13", 223 NULL, NULL, NULL, NULL, NULL, NULL, NULL, 224 "PECI 0.0", /* 0x20 */ 225 "PECI 1.0", 226 "PECI 2.0", 227 "PECI 3.0", 228 "PECI 0.1", 229 "PECI 1.1", 230 "PECI 2.1", 231 "PECI 3.1", 232 "PECI DIMM 0", 233 "PECI DIMM 1", 234 "PECI DIMM 2", 235 "PECI DIMM 3", 236 NULL, NULL, NULL, NULL, 237 "PCH CPU", /* 0x30 */ 238 "PCH CHIP", 239 "PCH CHIP CPU MAX", 240 "PCH MCH", 241 "PCH DIMM 0", 242 "PCH DIMM 1", 243 "PCH DIMM 2", 244 "PCH DIMM 3", 245 "SMBus 0", 246 "SMBus 1", 247 "SMBus 2", 248 "SMBus 3", 249 "SMBus 4", 250 "SMBus 5", 251 "DIMM 0", 252 "DIMM 1", 253 "DIMM 2", /* 0x40 */ 254 "DIMM 3", 255 "AMD TSI Addr 90h", 256 "AMD TSI Addr 92h", 257 "AMD TSI Addr 94h", 258 "AMD TSI Addr 96h", 259 "AMD TSI Addr 98h", 260 "AMD TSI Addr 9ah", 261 "AMD TSI Addr 9ch", 262 "AMD TSI Addr 9dh", 263 NULL, NULL, NULL, NULL, NULL, NULL, 264 "Virtual 0", /* 0x50 */ 265 "Virtual 1", 266 "Virtual 2", 267 "Virtual 3", 268 "Virtual 4", 269 "Virtual 5", 270 "Virtual 6", 271 "Virtual 7", 272 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, 273 "VCC", /* 0x60 voltage sensors */ 274 "VSB", 275 "AVSB", 276 "VTT", 277 "VBAT", 278 "VREF", 279 "VIN0", 280 "VIN1", 281 "VIN2", 282 "VIN3", 283 "VIN4", 284 "VIN5", 285 "VIN6", 286 "VIN7", 287 "VIN8", 288 "VIN9", 289 "VIN10", 290 "VIN11", 291 "VIN12", 292 "VIN13", 293 "VIN14", 294 "VIN15", 295 "VIN16", 296 }; 297 298 #define NUM_MON_LABELS ARRAY_SIZE(nct6683_mon_label) 299 #define MON_VOLTAGE_START 0x60 300 301 /* ------------------------------------------------------- */ 302 303 struct nct6683_data { 304 int addr; /* IO base of EC space */ 305 int sioreg; /* SIO register */ 306 enum kinds kind; 307 u16 customer_id; 308 309 struct device *hwmon_dev; 310 const struct attribute_group *groups[6]; 311 312 int temp_num; /* number of temperature attributes */ 313 u8 temp_index[NCT6683_NUM_REG_MON]; 314 u8 temp_src[NCT6683_NUM_REG_MON]; 315 316 u8 in_num; /* number of voltage attributes */ 317 u8 in_index[NCT6683_NUM_REG_MON]; 318 u8 in_src[NCT6683_NUM_REG_MON]; 319 320 struct mutex update_lock; /* used to protect sensor updates */ 321 bool valid; /* true if following fields are valid */ 322 unsigned long last_updated; /* In jiffies */ 323 324 /* Voltage attribute values */ 325 u8 in[3][NCT6683_NUM_REG_MON]; /* [0]=in, [1]=in_max, [2]=in_min */ 326 327 /* Temperature attribute values */ 328 s16 temp_in[NCT6683_NUM_REG_MON]; 329 s8 temp[4][NCT6683_NUM_REG_MON];/* [0]=min, [1]=max, [2]=hyst, 330 * [3]=crit 331 */ 332 333 /* Fan attribute values */ 334 unsigned int rpm[NCT6683_NUM_REG_FAN]; 335 u16 fan_min[NCT6683_NUM_REG_FAN]; 336 u8 fanin_cfg[NCT6683_NUM_REG_FAN]; 337 u8 fanout_cfg[NCT6683_NUM_REG_FAN]; 338 u16 have_fan; /* some fan inputs can be disabled */ 339 340 u8 have_pwm; 341 u8 pwm[NCT6683_NUM_REG_PWM]; 342 343 #ifdef CONFIG_PM 344 /* Remember extra register values over suspend/resume */ 345 u8 hwm_cfg; 346 #endif 347 }; 348 349 struct nct6683_sio_data { 350 int sioreg; 351 enum kinds kind; 352 }; 353 354 struct sensor_device_template { 355 struct device_attribute dev_attr; 356 union { 357 struct { 358 u8 nr; 359 u8 index; 360 } s; 361 int index; 362 } u; 363 bool s2; /* true if both index and nr are used */ 364 }; 365 366 struct sensor_device_attr_u { 367 union { 368 struct sensor_device_attribute a1; 369 struct sensor_device_attribute_2 a2; 370 } u; 371 char name[32]; 372 }; 373 374 #define __TEMPLATE_ATTR(_template, _mode, _show, _store) { \ 375 .attr = {.name = _template, .mode = _mode }, \ 376 .show = _show, \ 377 .store = _store, \ 378 } 379 380 #define SENSOR_DEVICE_TEMPLATE(_template, _mode, _show, _store, _index) \ 381 { .dev_attr = __TEMPLATE_ATTR(_template, _mode, _show, _store), \ 382 .u.index = _index, \ 383 .s2 = false } 384 385 #define SENSOR_DEVICE_TEMPLATE_2(_template, _mode, _show, _store, \ 386 _nr, _index) \ 387 { .dev_attr = __TEMPLATE_ATTR(_template, _mode, _show, _store), \ 388 .u.s.index = _index, \ 389 .u.s.nr = _nr, \ 390 .s2 = true } 391 392 #define SENSOR_TEMPLATE(_name, _template, _mode, _show, _store, _index) \ 393 static struct sensor_device_template sensor_dev_template_##_name \ 394 = SENSOR_DEVICE_TEMPLATE(_template, _mode, _show, _store, \ 395 _index) 396 397 #define SENSOR_TEMPLATE_2(_name, _template, _mode, _show, _store, \ 398 _nr, _index) \ 399 static struct sensor_device_template sensor_dev_template_##_name \ 400 = SENSOR_DEVICE_TEMPLATE_2(_template, _mode, _show, _store, \ 401 _nr, _index) 402 403 struct sensor_template_group { 404 struct sensor_device_template **templates; 405 umode_t (*is_visible)(struct kobject *, struct attribute *, int); 406 int base; 407 }; 408 409 static struct attribute_group * 410 nct6683_create_attr_group(struct device *dev, 411 const struct sensor_template_group *tg, 412 int repeat) 413 { 414 struct sensor_device_attribute_2 *a2; 415 struct sensor_device_attribute *a; 416 struct sensor_device_template **t; 417 struct sensor_device_attr_u *su; 418 struct attribute_group *group; 419 struct attribute **attrs; 420 int i, count; 421 422 if (repeat <= 0) 423 return ERR_PTR(-EINVAL); 424 425 t = tg->templates; 426 for (count = 0; *t; t++, count++) 427 ; 428 429 if (count == 0) 430 return ERR_PTR(-EINVAL); 431 432 group = devm_kzalloc(dev, sizeof(*group), GFP_KERNEL); 433 if (group == NULL) 434 return ERR_PTR(-ENOMEM); 435 436 attrs = devm_kcalloc(dev, repeat * count + 1, sizeof(*attrs), 437 GFP_KERNEL); 438 if (attrs == NULL) 439 return ERR_PTR(-ENOMEM); 440 441 su = devm_kzalloc(dev, array3_size(repeat, count, sizeof(*su)), 442 GFP_KERNEL); 443 if (su == NULL) 444 return ERR_PTR(-ENOMEM); 445 446 group->attrs = attrs; 447 group->is_visible = tg->is_visible; 448 449 for (i = 0; i < repeat; i++) { 450 t = tg->templates; 451 while (*t) { 452 snprintf(su->name, sizeof(su->name), 453 (*t)->dev_attr.attr.name, tg->base + i); 454 if ((*t)->s2) { 455 a2 = &su->u.a2; 456 sysfs_attr_init(&a2->dev_attr.attr); 457 a2->dev_attr.attr.name = su->name; 458 a2->nr = (*t)->u.s.nr + i; 459 a2->index = (*t)->u.s.index; 460 a2->dev_attr.attr.mode = 461 (*t)->dev_attr.attr.mode; 462 a2->dev_attr.show = (*t)->dev_attr.show; 463 a2->dev_attr.store = (*t)->dev_attr.store; 464 *attrs = &a2->dev_attr.attr; 465 } else { 466 a = &su->u.a1; 467 sysfs_attr_init(&a->dev_attr.attr); 468 a->dev_attr.attr.name = su->name; 469 a->index = (*t)->u.index + i; 470 a->dev_attr.attr.mode = 471 (*t)->dev_attr.attr.mode; 472 a->dev_attr.show = (*t)->dev_attr.show; 473 a->dev_attr.store = (*t)->dev_attr.store; 474 *attrs = &a->dev_attr.attr; 475 } 476 attrs++; 477 su++; 478 t++; 479 } 480 } 481 482 return group; 483 } 484 485 /* LSB is 16 mV, except for the following sources, where it is 32 mV */ 486 #define MON_SRC_VCC 0x60 487 #define MON_SRC_VSB 0x61 488 #define MON_SRC_AVSB 0x62 489 #define MON_SRC_VBAT 0x64 490 491 static inline long in_from_reg(u16 reg, u8 src) 492 { 493 int scale = 16; 494 495 if (src == MON_SRC_VCC || src == MON_SRC_VSB || src == MON_SRC_AVSB || 496 src == MON_SRC_VBAT) 497 scale <<= 1; 498 return reg * scale; 499 } 500 501 static u16 nct6683_read(struct nct6683_data *data, u16 reg) 502 { 503 int res; 504 505 outb_p(0xff, data->addr + EC_PAGE_REG); /* unlock */ 506 outb_p(reg >> 8, data->addr + EC_PAGE_REG); 507 outb_p(reg & 0xff, data->addr + EC_INDEX_REG); 508 res = inb_p(data->addr + EC_DATA_REG); 509 return res; 510 } 511 512 static u16 nct6683_read16(struct nct6683_data *data, u16 reg) 513 { 514 return (nct6683_read(data, reg) << 8) | nct6683_read(data, reg + 1); 515 } 516 517 static void nct6683_write(struct nct6683_data *data, u16 reg, u16 value) 518 { 519 outb_p(0xff, data->addr + EC_PAGE_REG); /* unlock */ 520 outb_p(reg >> 8, data->addr + EC_PAGE_REG); 521 outb_p(reg & 0xff, data->addr + EC_INDEX_REG); 522 outb_p(value & 0xff, data->addr + EC_DATA_REG); 523 } 524 525 static int get_in_reg(struct nct6683_data *data, int nr, int index) 526 { 527 int ch = data->in_index[index]; 528 int reg = -EINVAL; 529 530 switch (nr) { 531 case 0: 532 reg = NCT6683_REG_MON(ch); 533 break; 534 case 1: 535 if (data->customer_id != NCT6683_CUSTOMER_ID_INTEL) 536 reg = NCT6683_REG_MON_LOW(ch); 537 break; 538 case 2: 539 if (data->customer_id != NCT6683_CUSTOMER_ID_INTEL) 540 reg = NCT6683_REG_MON_HIGH(ch); 541 break; 542 default: 543 break; 544 } 545 return reg; 546 } 547 548 static int get_temp_reg(struct nct6683_data *data, int nr, int index) 549 { 550 int ch = data->temp_index[index]; 551 int reg = -EINVAL; 552 553 switch (data->customer_id) { 554 case NCT6683_CUSTOMER_ID_INTEL: 555 switch (nr) { 556 default: 557 case 1: /* max */ 558 reg = NCT6683_REG_INTEL_TEMP_MAX(ch); 559 break; 560 case 3: /* crit */ 561 reg = NCT6683_REG_INTEL_TEMP_CRIT(ch); 562 break; 563 } 564 break; 565 case NCT6683_CUSTOMER_ID_MITAC: 566 default: 567 switch (nr) { 568 default: 569 case 0: /* min */ 570 reg = NCT6683_REG_MON_LOW(ch); 571 break; 572 case 1: /* max */ 573 reg = NCT6683_REG_TEMP_MAX(ch); 574 break; 575 case 2: /* hyst */ 576 reg = NCT6683_REG_TEMP_HYST(ch); 577 break; 578 case 3: /* crit */ 579 reg = NCT6683_REG_MON_HIGH(ch); 580 break; 581 } 582 break; 583 } 584 return reg; 585 } 586 587 static void nct6683_update_pwm(struct device *dev) 588 { 589 struct nct6683_data *data = dev_get_drvdata(dev); 590 int i; 591 592 for (i = 0; i < NCT6683_NUM_REG_PWM; i++) { 593 if (!(data->have_pwm & (1 << i))) 594 continue; 595 data->pwm[i] = nct6683_read(data, NCT6683_REG_PWM(i)); 596 } 597 } 598 599 static struct nct6683_data *nct6683_update_device(struct device *dev) 600 { 601 struct nct6683_data *data = dev_get_drvdata(dev); 602 int i, j; 603 604 mutex_lock(&data->update_lock); 605 606 if (time_after(jiffies, data->last_updated + HZ) || !data->valid) { 607 /* Measured voltages and limits */ 608 for (i = 0; i < data->in_num; i++) { 609 for (j = 0; j < 3; j++) { 610 int reg = get_in_reg(data, j, i); 611 612 if (reg >= 0) 613 data->in[j][i] = 614 nct6683_read(data, reg); 615 } 616 } 617 618 /* Measured temperatures and limits */ 619 for (i = 0; i < data->temp_num; i++) { 620 u8 ch = data->temp_index[i]; 621 622 data->temp_in[i] = nct6683_read16(data, 623 NCT6683_REG_MON(ch)); 624 for (j = 0; j < 4; j++) { 625 int reg = get_temp_reg(data, j, i); 626 627 if (reg >= 0) 628 data->temp[j][i] = 629 nct6683_read(data, reg); 630 } 631 } 632 633 /* Measured fan speeds and limits */ 634 for (i = 0; i < ARRAY_SIZE(data->rpm); i++) { 635 if (!(data->have_fan & (1 << i))) 636 continue; 637 638 data->rpm[i] = nct6683_read16(data, 639 NCT6683_REG_FAN_RPM(i)); 640 data->fan_min[i] = nct6683_read16(data, 641 NCT6683_REG_FAN_MIN(i)); 642 } 643 644 nct6683_update_pwm(dev); 645 646 data->last_updated = jiffies; 647 data->valid = true; 648 } 649 650 mutex_unlock(&data->update_lock); 651 return data; 652 } 653 654 /* 655 * Sysfs callback functions 656 */ 657 static ssize_t 658 show_in_label(struct device *dev, struct device_attribute *attr, char *buf) 659 { 660 struct sensor_device_attribute *sattr = to_sensor_dev_attr(attr); 661 struct nct6683_data *data = nct6683_update_device(dev); 662 int nr = sattr->index; 663 664 return sprintf(buf, "%s\n", nct6683_mon_label[data->in_src[nr]]); 665 } 666 667 static ssize_t 668 show_in_reg(struct device *dev, struct device_attribute *attr, char *buf) 669 { 670 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr); 671 struct nct6683_data *data = nct6683_update_device(dev); 672 int index = sattr->index; 673 int nr = sattr->nr; 674 675 return sprintf(buf, "%ld\n", 676 in_from_reg(data->in[index][nr], data->in_index[index])); 677 } 678 679 static umode_t nct6683_in_is_visible(struct kobject *kobj, 680 struct attribute *attr, int index) 681 { 682 struct device *dev = kobj_to_dev(kobj); 683 struct nct6683_data *data = dev_get_drvdata(dev); 684 int nr = index % 4; /* attribute */ 685 686 /* 687 * Voltage limits exist for Intel boards, 688 * but register location and encoding is unknown 689 */ 690 if ((nr == 2 || nr == 3) && 691 data->customer_id == NCT6683_CUSTOMER_ID_INTEL) 692 return 0; 693 694 return attr->mode; 695 } 696 697 SENSOR_TEMPLATE(in_label, "in%d_label", S_IRUGO, show_in_label, NULL, 0); 698 SENSOR_TEMPLATE_2(in_input, "in%d_input", S_IRUGO, show_in_reg, NULL, 0, 0); 699 SENSOR_TEMPLATE_2(in_min, "in%d_min", S_IRUGO, show_in_reg, NULL, 0, 1); 700 SENSOR_TEMPLATE_2(in_max, "in%d_max", S_IRUGO, show_in_reg, NULL, 0, 2); 701 702 static struct sensor_device_template *nct6683_attributes_in_template[] = { 703 &sensor_dev_template_in_label, 704 &sensor_dev_template_in_input, 705 &sensor_dev_template_in_min, 706 &sensor_dev_template_in_max, 707 NULL 708 }; 709 710 static const struct sensor_template_group nct6683_in_template_group = { 711 .templates = nct6683_attributes_in_template, 712 .is_visible = nct6683_in_is_visible, 713 }; 714 715 static ssize_t 716 show_fan(struct device *dev, struct device_attribute *attr, char *buf) 717 { 718 struct sensor_device_attribute *sattr = to_sensor_dev_attr(attr); 719 struct nct6683_data *data = nct6683_update_device(dev); 720 721 return sprintf(buf, "%d\n", data->rpm[sattr->index]); 722 } 723 724 static ssize_t 725 show_fan_min(struct device *dev, struct device_attribute *attr, char *buf) 726 { 727 struct nct6683_data *data = nct6683_update_device(dev); 728 struct sensor_device_attribute *sattr = to_sensor_dev_attr(attr); 729 int nr = sattr->index; 730 731 return sprintf(buf, "%d\n", data->fan_min[nr]); 732 } 733 734 static ssize_t 735 show_fan_pulses(struct device *dev, struct device_attribute *attr, char *buf) 736 { 737 struct sensor_device_attribute *sattr = to_sensor_dev_attr(attr); 738 struct nct6683_data *data = nct6683_update_device(dev); 739 740 return sprintf(buf, "%d\n", 741 ((data->fanin_cfg[sattr->index] >> 5) & 0x03) + 1); 742 } 743 744 static umode_t nct6683_fan_is_visible(struct kobject *kobj, 745 struct attribute *attr, int index) 746 { 747 struct device *dev = kobj_to_dev(kobj); 748 struct nct6683_data *data = dev_get_drvdata(dev); 749 int fan = index / 3; /* fan index */ 750 int nr = index % 3; /* attribute index */ 751 752 if (!(data->have_fan & (1 << fan))) 753 return 0; 754 755 /* 756 * Intel may have minimum fan speed limits, 757 * but register location and encoding are unknown. 758 */ 759 if (nr == 2 && data->customer_id == NCT6683_CUSTOMER_ID_INTEL) 760 return 0; 761 762 return attr->mode; 763 } 764 765 SENSOR_TEMPLATE(fan_input, "fan%d_input", S_IRUGO, show_fan, NULL, 0); 766 SENSOR_TEMPLATE(fan_pulses, "fan%d_pulses", S_IRUGO, show_fan_pulses, NULL, 0); 767 SENSOR_TEMPLATE(fan_min, "fan%d_min", S_IRUGO, show_fan_min, NULL, 0); 768 769 /* 770 * nct6683_fan_is_visible uses the index into the following array 771 * to determine if attributes should be created or not. 772 * Any change in order or content must be matched. 773 */ 774 static struct sensor_device_template *nct6683_attributes_fan_template[] = { 775 &sensor_dev_template_fan_input, 776 &sensor_dev_template_fan_pulses, 777 &sensor_dev_template_fan_min, 778 NULL 779 }; 780 781 static const struct sensor_template_group nct6683_fan_template_group = { 782 .templates = nct6683_attributes_fan_template, 783 .is_visible = nct6683_fan_is_visible, 784 .base = 1, 785 }; 786 787 static ssize_t 788 show_temp_label(struct device *dev, struct device_attribute *attr, char *buf) 789 { 790 struct sensor_device_attribute *sattr = to_sensor_dev_attr(attr); 791 struct nct6683_data *data = nct6683_update_device(dev); 792 int nr = sattr->index; 793 794 return sprintf(buf, "%s\n", nct6683_mon_label[data->temp_src[nr]]); 795 } 796 797 static ssize_t 798 show_temp8(struct device *dev, struct device_attribute *attr, char *buf) 799 { 800 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr); 801 struct nct6683_data *data = nct6683_update_device(dev); 802 int index = sattr->index; 803 int nr = sattr->nr; 804 805 return sprintf(buf, "%d\n", data->temp[index][nr] * 1000); 806 } 807 808 static ssize_t 809 show_temp_hyst(struct device *dev, struct device_attribute *attr, char *buf) 810 { 811 struct sensor_device_attribute *sattr = to_sensor_dev_attr(attr); 812 struct nct6683_data *data = nct6683_update_device(dev); 813 int nr = sattr->index; 814 int temp = data->temp[1][nr] - data->temp[2][nr]; 815 816 return sprintf(buf, "%d\n", temp * 1000); 817 } 818 819 static ssize_t 820 show_temp16(struct device *dev, struct device_attribute *attr, char *buf) 821 { 822 struct sensor_device_attribute *sattr = to_sensor_dev_attr(attr); 823 struct nct6683_data *data = nct6683_update_device(dev); 824 int index = sattr->index; 825 826 return sprintf(buf, "%d\n", (data->temp_in[index] / 128) * 500); 827 } 828 829 /* 830 * Temperature sensor type is determined by temperature source 831 * and can not be modified. 832 * 0x02..0x07: Thermal diode 833 * 0x08..0x18: Thermistor 834 * 0x20..0x2b: Intel PECI 835 * 0x42..0x49: AMD TSI 836 * Others are unspecified (not visible) 837 */ 838 839 static int get_temp_type(u8 src) 840 { 841 if (src >= 0x02 && src <= 0x07) 842 return 3; /* thermal diode */ 843 else if (src >= 0x08 && src <= 0x18) 844 return 4; /* thermistor */ 845 else if (src >= 0x20 && src <= 0x2b) 846 return 6; /* PECI */ 847 else if (src >= 0x42 && src <= 0x49) 848 return 5; 849 850 return 0; 851 } 852 853 static ssize_t 854 show_temp_type(struct device *dev, struct device_attribute *attr, char *buf) 855 { 856 struct nct6683_data *data = nct6683_update_device(dev); 857 struct sensor_device_attribute *sattr = to_sensor_dev_attr(attr); 858 int nr = sattr->index; 859 return sprintf(buf, "%d\n", get_temp_type(data->temp_src[nr])); 860 } 861 862 static umode_t nct6683_temp_is_visible(struct kobject *kobj, 863 struct attribute *attr, int index) 864 { 865 struct device *dev = kobj_to_dev(kobj); 866 struct nct6683_data *data = dev_get_drvdata(dev); 867 int temp = index / 7; /* temp index */ 868 int nr = index % 7; /* attribute index */ 869 870 /* 871 * Intel does not have low temperature limits or temperature hysteresis 872 * registers, or at least register location and encoding is unknown. 873 */ 874 if ((nr == 2 || nr == 4) && 875 data->customer_id == NCT6683_CUSTOMER_ID_INTEL) 876 return 0; 877 878 if (nr == 6 && get_temp_type(data->temp_src[temp]) == 0) 879 return 0; /* type */ 880 881 return attr->mode; 882 } 883 884 SENSOR_TEMPLATE(temp_input, "temp%d_input", S_IRUGO, show_temp16, NULL, 0); 885 SENSOR_TEMPLATE(temp_label, "temp%d_label", S_IRUGO, show_temp_label, NULL, 0); 886 SENSOR_TEMPLATE_2(temp_min, "temp%d_min", S_IRUGO, show_temp8, NULL, 0, 0); 887 SENSOR_TEMPLATE_2(temp_max, "temp%d_max", S_IRUGO, show_temp8, NULL, 0, 1); 888 SENSOR_TEMPLATE(temp_max_hyst, "temp%d_max_hyst", S_IRUGO, show_temp_hyst, NULL, 889 0); 890 SENSOR_TEMPLATE_2(temp_crit, "temp%d_crit", S_IRUGO, show_temp8, NULL, 0, 3); 891 SENSOR_TEMPLATE(temp_type, "temp%d_type", S_IRUGO, show_temp_type, NULL, 0); 892 893 /* 894 * nct6683_temp_is_visible uses the index into the following array 895 * to determine if attributes should be created or not. 896 * Any change in order or content must be matched. 897 */ 898 static struct sensor_device_template *nct6683_attributes_temp_template[] = { 899 &sensor_dev_template_temp_input, 900 &sensor_dev_template_temp_label, 901 &sensor_dev_template_temp_min, /* 2 */ 902 &sensor_dev_template_temp_max, /* 3 */ 903 &sensor_dev_template_temp_max_hyst, /* 4 */ 904 &sensor_dev_template_temp_crit, /* 5 */ 905 &sensor_dev_template_temp_type, /* 6 */ 906 NULL 907 }; 908 909 static const struct sensor_template_group nct6683_temp_template_group = { 910 .templates = nct6683_attributes_temp_template, 911 .is_visible = nct6683_temp_is_visible, 912 .base = 1, 913 }; 914 915 static ssize_t 916 show_pwm(struct device *dev, struct device_attribute *attr, char *buf) 917 { 918 struct nct6683_data *data = nct6683_update_device(dev); 919 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr); 920 int index = sattr->index; 921 922 return sprintf(buf, "%d\n", data->pwm[index]); 923 } 924 925 static ssize_t 926 store_pwm(struct device *dev, struct device_attribute *attr, const char *buf, 927 size_t count) 928 { 929 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr); 930 struct nct6683_data *data = dev_get_drvdata(dev); 931 int index = sattr->index; 932 unsigned long val; 933 934 if (kstrtoul(buf, 10, &val) || val > 255) 935 return -EINVAL; 936 937 mutex_lock(&data->update_lock); 938 nct6683_write(data, NCT6683_REG_FAN_CFG_CTRL, NCT6683_FAN_CFG_REQ); 939 usleep_range(1000, 2000); 940 nct6683_write(data, NCT6683_REG_PWM_WRITE(index), val); 941 nct6683_write(data, NCT6683_REG_FAN_CFG_CTRL, NCT6683_FAN_CFG_DONE); 942 mutex_unlock(&data->update_lock); 943 944 return count; 945 } 946 947 SENSOR_TEMPLATE(pwm, "pwm%d", S_IRUGO, show_pwm, store_pwm, 0); 948 949 static umode_t nct6683_pwm_is_visible(struct kobject *kobj, 950 struct attribute *attr, int index) 951 { 952 struct device *dev = kobj_to_dev(kobj); 953 struct nct6683_data *data = dev_get_drvdata(dev); 954 int pwm = index; /* pwm index */ 955 956 if (!(data->have_pwm & (1 << pwm))) 957 return 0; 958 959 /* Only update pwm values for Mitac boards */ 960 if (data->customer_id == NCT6683_CUSTOMER_ID_MITAC) 961 return attr->mode | S_IWUSR; 962 963 return attr->mode; 964 } 965 966 static struct sensor_device_template *nct6683_attributes_pwm_template[] = { 967 &sensor_dev_template_pwm, 968 NULL 969 }; 970 971 static const struct sensor_template_group nct6683_pwm_template_group = { 972 .templates = nct6683_attributes_pwm_template, 973 .is_visible = nct6683_pwm_is_visible, 974 .base = 1, 975 }; 976 977 static ssize_t 978 beep_enable_show(struct device *dev, struct device_attribute *attr, char *buf) 979 { 980 struct nct6683_data *data = dev_get_drvdata(dev); 981 int ret; 982 u8 reg; 983 984 mutex_lock(&data->update_lock); 985 986 ret = superio_enter(data->sioreg); 987 if (ret) 988 goto error; 989 superio_select(data->sioreg, NCT6683_LD_HWM); 990 reg = superio_inb(data->sioreg, NCT6683_REG_CR_BEEP); 991 superio_exit(data->sioreg); 992 993 mutex_unlock(&data->update_lock); 994 995 return sprintf(buf, "%u\n", !!(reg & NCT6683_CR_BEEP_MASK)); 996 997 error: 998 mutex_unlock(&data->update_lock); 999 return ret; 1000 } 1001 1002 static ssize_t 1003 beep_enable_store(struct device *dev, struct device_attribute *attr, 1004 const char *buf, size_t count) 1005 { 1006 struct nct6683_data *data = dev_get_drvdata(dev); 1007 unsigned long val; 1008 u8 reg; 1009 int ret; 1010 1011 if (kstrtoul(buf, 10, &val) || (val != 0 && val != 1)) 1012 return -EINVAL; 1013 1014 mutex_lock(&data->update_lock); 1015 1016 ret = superio_enter(data->sioreg); 1017 if (ret) { 1018 count = ret; 1019 goto error; 1020 } 1021 1022 superio_select(data->sioreg, NCT6683_LD_HWM); 1023 reg = superio_inb(data->sioreg, NCT6683_REG_CR_BEEP); 1024 if (val) 1025 reg |= NCT6683_CR_BEEP_MASK; 1026 else 1027 reg &= ~NCT6683_CR_BEEP_MASK; 1028 superio_outb(data->sioreg, NCT6683_REG_CR_BEEP, reg); 1029 superio_exit(data->sioreg); 1030 error: 1031 mutex_unlock(&data->update_lock); 1032 return count; 1033 } 1034 1035 /* Case open detection */ 1036 1037 static ssize_t 1038 intrusion0_alarm_show(struct device *dev, struct device_attribute *attr, 1039 char *buf) 1040 { 1041 struct nct6683_data *data = dev_get_drvdata(dev); 1042 int ret; 1043 u8 reg; 1044 1045 mutex_lock(&data->update_lock); 1046 1047 ret = superio_enter(data->sioreg); 1048 if (ret) 1049 goto error; 1050 superio_select(data->sioreg, NCT6683_LD_ACPI); 1051 reg = superio_inb(data->sioreg, NCT6683_REG_CR_CASEOPEN); 1052 superio_exit(data->sioreg); 1053 1054 mutex_unlock(&data->update_lock); 1055 1056 return sprintf(buf, "%u\n", !(reg & NCT6683_CR_CASEOPEN_MASK)); 1057 1058 error: 1059 mutex_unlock(&data->update_lock); 1060 return ret; 1061 } 1062 1063 static ssize_t 1064 intrusion0_alarm_store(struct device *dev, struct device_attribute *attr, 1065 const char *buf, size_t count) 1066 { 1067 struct nct6683_data *data = dev_get_drvdata(dev); 1068 unsigned long val; 1069 u8 reg; 1070 int ret; 1071 1072 if (kstrtoul(buf, 10, &val) || val != 0) 1073 return -EINVAL; 1074 1075 mutex_lock(&data->update_lock); 1076 1077 /* 1078 * Use CR registers to clear caseopen status. 1079 * Caseopen is activ low, clear by writing 1 into the register. 1080 */ 1081 1082 ret = superio_enter(data->sioreg); 1083 if (ret) { 1084 count = ret; 1085 goto error; 1086 } 1087 1088 superio_select(data->sioreg, NCT6683_LD_ACPI); 1089 reg = superio_inb(data->sioreg, NCT6683_REG_CR_CASEOPEN); 1090 reg |= NCT6683_CR_CASEOPEN_MASK; 1091 superio_outb(data->sioreg, NCT6683_REG_CR_CASEOPEN, reg); 1092 reg &= ~NCT6683_CR_CASEOPEN_MASK; 1093 superio_outb(data->sioreg, NCT6683_REG_CR_CASEOPEN, reg); 1094 superio_exit(data->sioreg); 1095 1096 data->valid = false; /* Force cache refresh */ 1097 error: 1098 mutex_unlock(&data->update_lock); 1099 return count; 1100 } 1101 1102 static DEVICE_ATTR_RW(intrusion0_alarm); 1103 static DEVICE_ATTR_RW(beep_enable); 1104 1105 static struct attribute *nct6683_attributes_other[] = { 1106 &dev_attr_intrusion0_alarm.attr, 1107 &dev_attr_beep_enable.attr, 1108 NULL 1109 }; 1110 1111 static const struct attribute_group nct6683_group_other = { 1112 .attrs = nct6683_attributes_other, 1113 }; 1114 1115 /* Get the monitoring functions started */ 1116 static inline void nct6683_init_device(struct nct6683_data *data) 1117 { 1118 u8 tmp; 1119 1120 /* Start hardware monitoring if needed */ 1121 tmp = nct6683_read(data, NCT6683_HWM_CFG); 1122 if (!(tmp & 0x80)) 1123 nct6683_write(data, NCT6683_HWM_CFG, tmp | 0x80); 1124 } 1125 1126 /* 1127 * There are a total of 24 fan inputs. Each can be configured as input 1128 * or as output. A maximum of 16 inputs and 8 outputs is configurable. 1129 */ 1130 static void 1131 nct6683_setup_fans(struct nct6683_data *data) 1132 { 1133 int i; 1134 u8 reg; 1135 1136 for (i = 0; i < NCT6683_NUM_REG_FAN; i++) { 1137 reg = nct6683_read(data, NCT6683_REG_FANIN_CFG(i)); 1138 if (reg & 0x80) 1139 data->have_fan |= 1 << i; 1140 data->fanin_cfg[i] = reg; 1141 } 1142 for (i = 0; i < NCT6683_NUM_REG_PWM; i++) { 1143 reg = nct6683_read(data, NCT6683_REG_FANOUT_CFG(i)); 1144 if (reg & 0x80) 1145 data->have_pwm |= 1 << i; 1146 data->fanout_cfg[i] = reg; 1147 } 1148 } 1149 1150 /* 1151 * Translation from monitoring register to temperature and voltage attributes 1152 * ========================================================================== 1153 * 1154 * There are a total of 32 monitoring registers. Each can be assigned to either 1155 * a temperature or voltage monitoring source. 1156 * NCT6683_REG_MON_CFG(x) defines assignment for each monitoring source. 1157 * 1158 * Temperature and voltage attribute mapping is determined by walking through 1159 * the NCT6683_REG_MON_CFG registers. If the assigned source is 1160 * a temperature, temp_index[n] is set to the monitor register index, and 1161 * temp_src[n] is set to the temperature source. If the assigned source is 1162 * a voltage, the respective values are stored in in_index[] and in_src[], 1163 * respectively. 1164 */ 1165 1166 static void nct6683_setup_sensors(struct nct6683_data *data) 1167 { 1168 u8 reg; 1169 int i; 1170 1171 data->temp_num = 0; 1172 data->in_num = 0; 1173 for (i = 0; i < NCT6683_NUM_REG_MON; i++) { 1174 reg = nct6683_read(data, NCT6683_REG_MON_CFG(i)) & 0x7f; 1175 /* Ignore invalid assignments */ 1176 if (reg >= NUM_MON_LABELS) 1177 continue; 1178 /* Skip if disabled or reserved */ 1179 if (nct6683_mon_label[reg] == NULL) 1180 continue; 1181 if (reg < MON_VOLTAGE_START) { 1182 data->temp_index[data->temp_num] = i; 1183 data->temp_src[data->temp_num] = reg; 1184 data->temp_num++; 1185 } else { 1186 data->in_index[data->in_num] = i; 1187 data->in_src[data->in_num] = reg; 1188 data->in_num++; 1189 } 1190 } 1191 } 1192 1193 static int nct6683_probe(struct platform_device *pdev) 1194 { 1195 struct device *dev = &pdev->dev; 1196 struct nct6683_sio_data *sio_data = dev->platform_data; 1197 struct attribute_group *group; 1198 struct nct6683_data *data; 1199 struct device *hwmon_dev; 1200 struct resource *res; 1201 int groups = 0; 1202 char build[16]; 1203 1204 res = platform_get_resource(pdev, IORESOURCE_IO, 0); 1205 if (!devm_request_region(dev, res->start, IOREGION_LENGTH, DRVNAME)) 1206 return -EBUSY; 1207 1208 data = devm_kzalloc(dev, sizeof(struct nct6683_data), GFP_KERNEL); 1209 if (!data) 1210 return -ENOMEM; 1211 1212 data->kind = sio_data->kind; 1213 data->sioreg = sio_data->sioreg; 1214 data->addr = res->start; 1215 mutex_init(&data->update_lock); 1216 platform_set_drvdata(pdev, data); 1217 1218 data->customer_id = nct6683_read16(data, NCT6683_REG_CUSTOMER_ID); 1219 1220 /* By default only instantiate driver if the customer ID is known */ 1221 switch (data->customer_id) { 1222 case NCT6683_CUSTOMER_ID_INTEL: 1223 break; 1224 case NCT6683_CUSTOMER_ID_MITAC: 1225 break; 1226 case NCT6683_CUSTOMER_ID_MSI: 1227 break; 1228 case NCT6683_CUSTOMER_ID_MSI2: 1229 break; 1230 case NCT6683_CUSTOMER_ID_MSI3: 1231 break; 1232 case NCT6683_CUSTOMER_ID_MSI4: 1233 break; 1234 case NCT6683_CUSTOMER_ID_ASROCK: 1235 break; 1236 case NCT6683_CUSTOMER_ID_ASROCK2: 1237 break; 1238 case NCT6683_CUSTOMER_ID_ASROCK3: 1239 break; 1240 case NCT6683_CUSTOMER_ID_ASROCK4: 1241 break; 1242 default: 1243 if (!force) 1244 return -ENODEV; 1245 dev_warn(dev, "Enabling support for unknown customer ID 0x%04x\n", data->customer_id); 1246 break; 1247 } 1248 1249 nct6683_init_device(data); 1250 nct6683_setup_fans(data); 1251 nct6683_setup_sensors(data); 1252 1253 /* Register sysfs hooks */ 1254 1255 if (data->have_pwm) { 1256 group = nct6683_create_attr_group(dev, 1257 &nct6683_pwm_template_group, 1258 fls(data->have_pwm)); 1259 if (IS_ERR(group)) 1260 return PTR_ERR(group); 1261 data->groups[groups++] = group; 1262 } 1263 1264 if (data->in_num) { 1265 group = nct6683_create_attr_group(dev, 1266 &nct6683_in_template_group, 1267 data->in_num); 1268 if (IS_ERR(group)) 1269 return PTR_ERR(group); 1270 data->groups[groups++] = group; 1271 } 1272 1273 if (data->have_fan) { 1274 group = nct6683_create_attr_group(dev, 1275 &nct6683_fan_template_group, 1276 fls(data->have_fan)); 1277 if (IS_ERR(group)) 1278 return PTR_ERR(group); 1279 data->groups[groups++] = group; 1280 } 1281 1282 if (data->temp_num) { 1283 group = nct6683_create_attr_group(dev, 1284 &nct6683_temp_template_group, 1285 data->temp_num); 1286 if (IS_ERR(group)) 1287 return PTR_ERR(group); 1288 data->groups[groups++] = group; 1289 } 1290 data->groups[groups++] = &nct6683_group_other; 1291 1292 if (data->customer_id == NCT6683_CUSTOMER_ID_INTEL) 1293 scnprintf(build, sizeof(build), "%02x/%02x/%02x", 1294 nct6683_read(data, NCT6683_REG_BUILD_MONTH), 1295 nct6683_read(data, NCT6683_REG_BUILD_DAY), 1296 nct6683_read(data, NCT6683_REG_BUILD_YEAR)); 1297 else 1298 scnprintf(build, sizeof(build), "%02d/%02d/%02d", 1299 nct6683_read(data, NCT6683_REG_BUILD_MONTH), 1300 nct6683_read(data, NCT6683_REG_BUILD_DAY), 1301 nct6683_read(data, NCT6683_REG_BUILD_YEAR)); 1302 1303 dev_info(dev, "%s EC firmware version %d.%d build %s\n", 1304 nct6683_chip_names[data->kind], 1305 nct6683_read(data, NCT6683_REG_VERSION_HI), 1306 nct6683_read(data, NCT6683_REG_VERSION_LO), 1307 build); 1308 1309 hwmon_dev = devm_hwmon_device_register_with_groups(dev, 1310 nct6683_device_names[data->kind], data, data->groups); 1311 return PTR_ERR_OR_ZERO(hwmon_dev); 1312 } 1313 1314 #ifdef CONFIG_PM 1315 static int nct6683_suspend(struct device *dev) 1316 { 1317 struct nct6683_data *data = nct6683_update_device(dev); 1318 1319 mutex_lock(&data->update_lock); 1320 data->hwm_cfg = nct6683_read(data, NCT6683_HWM_CFG); 1321 mutex_unlock(&data->update_lock); 1322 1323 return 0; 1324 } 1325 1326 static int nct6683_resume(struct device *dev) 1327 { 1328 struct nct6683_data *data = dev_get_drvdata(dev); 1329 1330 mutex_lock(&data->update_lock); 1331 1332 nct6683_write(data, NCT6683_HWM_CFG, data->hwm_cfg); 1333 1334 /* Force re-reading all values */ 1335 data->valid = false; 1336 mutex_unlock(&data->update_lock); 1337 1338 return 0; 1339 } 1340 1341 static const struct dev_pm_ops nct6683_dev_pm_ops = { 1342 .suspend = nct6683_suspend, 1343 .resume = nct6683_resume, 1344 .freeze = nct6683_suspend, 1345 .restore = nct6683_resume, 1346 }; 1347 1348 #define NCT6683_DEV_PM_OPS (&nct6683_dev_pm_ops) 1349 #else 1350 #define NCT6683_DEV_PM_OPS NULL 1351 #endif /* CONFIG_PM */ 1352 1353 static struct platform_driver nct6683_driver = { 1354 .driver = { 1355 .name = DRVNAME, 1356 .pm = NCT6683_DEV_PM_OPS, 1357 }, 1358 .probe = nct6683_probe, 1359 }; 1360 1361 static int __init nct6683_find(int sioaddr, struct nct6683_sio_data *sio_data) 1362 { 1363 int addr; 1364 u16 val; 1365 int err; 1366 1367 err = superio_enter(sioaddr); 1368 if (err) 1369 return err; 1370 1371 val = (superio_inb(sioaddr, SIO_REG_DEVID) << 8) 1372 | superio_inb(sioaddr, SIO_REG_DEVID + 1); 1373 1374 switch (val & SIO_ID_MASK) { 1375 case SIO_NCT6683_ID: 1376 sio_data->kind = nct6683; 1377 break; 1378 case SIO_NCT6686_ID: 1379 sio_data->kind = nct6686; 1380 break; 1381 case SIO_NCT6687_ID: 1382 sio_data->kind = nct6687; 1383 break; 1384 default: 1385 if (val != 0xffff) 1386 pr_debug("unsupported chip ID: 0x%04x\n", val); 1387 goto fail; 1388 } 1389 1390 /* We have a known chip, find the HWM I/O address */ 1391 superio_select(sioaddr, NCT6683_LD_HWM); 1392 val = (superio_inb(sioaddr, SIO_REG_ADDR) << 8) 1393 | superio_inb(sioaddr, SIO_REG_ADDR + 1); 1394 addr = val & IOREGION_ALIGNMENT; 1395 if (addr == 0) { 1396 pr_err("EC base I/O port unconfigured\n"); 1397 goto fail; 1398 } 1399 1400 /* Activate logical device if needed */ 1401 val = superio_inb(sioaddr, SIO_REG_ENABLE); 1402 if (!(val & 0x01)) { 1403 pr_warn("Forcibly enabling EC access. Data may be unusable.\n"); 1404 superio_outb(sioaddr, SIO_REG_ENABLE, val | 0x01); 1405 } 1406 1407 superio_exit(sioaddr); 1408 pr_info("Found %s or compatible chip at %#x:%#x\n", 1409 nct6683_chip_names[sio_data->kind], sioaddr, addr); 1410 sio_data->sioreg = sioaddr; 1411 1412 return addr; 1413 1414 fail: 1415 superio_exit(sioaddr); 1416 return -ENODEV; 1417 } 1418 1419 /* 1420 * when Super-I/O functions move to a separate file, the Super-I/O 1421 * bus will manage the lifetime of the device and this module will only keep 1422 * track of the nct6683 driver. But since we use platform_device_alloc(), we 1423 * must keep track of the device 1424 */ 1425 static struct platform_device *pdev[2]; 1426 1427 static int __init sensors_nct6683_init(void) 1428 { 1429 struct nct6683_sio_data sio_data; 1430 int sioaddr[2] = { 0x2e, 0x4e }; 1431 struct resource res; 1432 bool found = false; 1433 int address; 1434 int i, err; 1435 1436 err = platform_driver_register(&nct6683_driver); 1437 if (err) 1438 return err; 1439 1440 /* 1441 * initialize sio_data->kind and sio_data->sioreg. 1442 * 1443 * when Super-I/O functions move to a separate file, the Super-I/O 1444 * driver will probe 0x2e and 0x4e and auto-detect the presence of a 1445 * nct6683 hardware monitor, and call probe() 1446 */ 1447 for (i = 0; i < ARRAY_SIZE(pdev); i++) { 1448 address = nct6683_find(sioaddr[i], &sio_data); 1449 if (address <= 0) 1450 continue; 1451 1452 found = true; 1453 1454 pdev[i] = platform_device_alloc(DRVNAME, address); 1455 if (!pdev[i]) { 1456 err = -ENOMEM; 1457 goto exit_device_unregister; 1458 } 1459 1460 err = platform_device_add_data(pdev[i], &sio_data, 1461 sizeof(struct nct6683_sio_data)); 1462 if (err) 1463 goto exit_device_put; 1464 1465 memset(&res, 0, sizeof(res)); 1466 res.name = DRVNAME; 1467 res.start = address + IOREGION_OFFSET; 1468 res.end = address + IOREGION_OFFSET + IOREGION_LENGTH - 1; 1469 res.flags = IORESOURCE_IO; 1470 1471 err = acpi_check_resource_conflict(&res); 1472 if (err) { 1473 platform_device_put(pdev[i]); 1474 pdev[i] = NULL; 1475 continue; 1476 } 1477 1478 err = platform_device_add_resources(pdev[i], &res, 1); 1479 if (err) 1480 goto exit_device_put; 1481 1482 /* platform_device_add calls probe() */ 1483 err = platform_device_add(pdev[i]); 1484 if (err) 1485 goto exit_device_put; 1486 } 1487 if (!found) { 1488 err = -ENODEV; 1489 goto exit_unregister; 1490 } 1491 1492 return 0; 1493 1494 exit_device_put: 1495 platform_device_put(pdev[i]); 1496 exit_device_unregister: 1497 while (--i >= 0) { 1498 if (pdev[i]) 1499 platform_device_unregister(pdev[i]); 1500 } 1501 exit_unregister: 1502 platform_driver_unregister(&nct6683_driver); 1503 return err; 1504 } 1505 1506 static void __exit sensors_nct6683_exit(void) 1507 { 1508 int i; 1509 1510 for (i = 0; i < ARRAY_SIZE(pdev); i++) { 1511 if (pdev[i]) 1512 platform_device_unregister(pdev[i]); 1513 } 1514 platform_driver_unregister(&nct6683_driver); 1515 } 1516 1517 MODULE_AUTHOR("Guenter Roeck <linux@roeck-us.net>"); 1518 MODULE_DESCRIPTION("NCT6683D driver"); 1519 MODULE_LICENSE("GPL"); 1520 1521 module_init(sensors_nct6683_init); 1522 module_exit(sensors_nct6683_exit); 1523