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