pc87427.c 39.6 KB
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 1349 1350 1351 1352
/*
 *  pc87427.c - hardware monitoring driver for the
 *              National Semiconductor PC87427 Super-I/O chip
 *  Copyright (C) 2006, 2008, 2010  Jean Delvare <jdelvare@suse.de>
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License version 2 as
 *  published by the Free Software Foundation.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  Supports the following chips:
 *
 *  Chip        #vin    #fan    #pwm    #temp   devid
 *  PC87427     -       8       4       6       0xF2
 *
 *  This driver assumes that no more than one chip is present.
 *  Only fans are fully supported so far. Temperatures are in read-only
 *  mode, and voltages aren't supported at all.
 */

#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

#include <linux/module.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/jiffies.h>
#include <linux/platform_device.h>
#include <linux/hwmon.h>
#include <linux/hwmon-sysfs.h>
#include <linux/err.h>
#include <linux/mutex.h>
#include <linux/sysfs.h>
#include <linux/ioport.h>
#include <linux/acpi.h>
#include <linux/io.h>

static unsigned short force_id;
module_param(force_id, ushort, 0);
MODULE_PARM_DESC(force_id, "Override the detected device ID");

static struct platform_device *pdev;

#define DRVNAME "pc87427"

/*
 * The lock mutex protects both the I/O accesses (needed because the
 * device is using banked registers) and the register cache (needed to keep
 * the data in the registers and the cache in sync at any time).
 */
struct pc87427_data {
	struct device *hwmon_dev;
	struct mutex lock;
	int address[2];
	const char *name;

	unsigned long last_updated;	/* in jiffies */
	u8 fan_enabled;			/* bit vector */
	u16 fan[8];			/* register values */
	u16 fan_min[8];			/* register values */
	u8 fan_status[8];		/* register values */

	u8 pwm_enabled;			/* bit vector */
	u8 pwm_auto_ok;			/* bit vector */
	u8 pwm_enable[4];		/* register values */
	u8 pwm[4];			/* register values */

	u8 temp_enabled;		/* bit vector */
	s16 temp[6];			/* register values */
	s8 temp_min[6];			/* register values */
	s8 temp_max[6];			/* register values */
	s8 temp_crit[6];		/* register values */
	u8 temp_status[6];		/* register values */
	u8 temp_type[6];		/* register values */
};

struct pc87427_sio_data {
	unsigned short address[2];
	u8 has_fanin;
	u8 has_fanout;
};

/*
 * Super-I/O registers and operations
 */

#define SIOREG_LDSEL	0x07	/* Logical device select */
#define SIOREG_DEVID	0x20	/* Device ID */
#define SIOREG_CF2	0x22	/* Configuration 2 */
#define SIOREG_CF3	0x23	/* Configuration 3 */
#define SIOREG_CF4	0x24	/* Configuration 4 */
#define SIOREG_CF5	0x25	/* Configuration 5 */
#define SIOREG_CFB	0x2B	/* Configuration B */
#define SIOREG_CFC	0x2C	/* Configuration C */
#define SIOREG_CFD	0x2D	/* Configuration D */
#define SIOREG_ACT	0x30	/* Device activation */
#define SIOREG_MAP	0x50	/* I/O or memory mapping */
#define SIOREG_IOBASE	0x60	/* I/O base address */

static const u8 logdev[2] = { 0x09, 0x14 };
static const char *logdev_str[2] = { DRVNAME " FMC", DRVNAME " HMC" };
#define LD_FAN		0
#define LD_IN		1
#define LD_TEMP		1

static inline void superio_outb(int sioaddr, int reg, int val)
{
	outb(reg, sioaddr);
	outb(val, sioaddr + 1);
}

static inline int superio_inb(int sioaddr, int reg)
{
	outb(reg, sioaddr);
	return inb(sioaddr + 1);
}

static inline void superio_exit(int sioaddr)
{
	outb(0x02, sioaddr);
	outb(0x02, sioaddr + 1);
}

/*
 * Logical devices
 */

#define REGION_LENGTH		32
#define PC87427_REG_BANK	0x0f
#define BANK_FM(nr)		(nr)
#define BANK_FT(nr)		(0x08 + (nr))
#define BANK_FC(nr)		(0x10 + (nr) * 2)
#define BANK_TM(nr)		(nr)
#define BANK_VM(nr)		(0x08 + (nr))

/*
 * I/O access functions
 */

/* ldi is the logical device index */
static inline int pc87427_read8(struct pc87427_data *data, u8 ldi, u8 reg)
{
	return inb(data->address[ldi] + reg);
}

/* Must be called with data->lock held, except during init */
static inline int pc87427_read8_bank(struct pc87427_data *data, u8 ldi,
				     u8 bank, u8 reg)
{
	outb(bank, data->address[ldi] + PC87427_REG_BANK);
	return inb(data->address[ldi] + reg);
}

/* Must be called with data->lock held, except during init */
static inline void pc87427_write8_bank(struct pc87427_data *data, u8 ldi,
				       u8 bank, u8 reg, u8 value)
{
	outb(bank, data->address[ldi] + PC87427_REG_BANK);
	outb(value, data->address[ldi] + reg);
}

/*
 * Fan registers and conversions
 */

/* fan data registers are 16-bit wide */
#define PC87427_REG_FAN			0x12
#define PC87427_REG_FAN_MIN		0x14
#define PC87427_REG_FAN_STATUS		0x10

#define FAN_STATUS_STALL		(1 << 3)
#define FAN_STATUS_LOSPD		(1 << 1)
#define FAN_STATUS_MONEN		(1 << 0)

/*
 * Dedicated function to read all registers related to a given fan input.
 * This saves us quite a few locks and bank selections.
 * Must be called with data->lock held.
 * nr is from 0 to 7
 */
static void pc87427_readall_fan(struct pc87427_data *data, u8 nr)
{
	int iobase = data->address[LD_FAN];

	outb(BANK_FM(nr), iobase + PC87427_REG_BANK);
	data->fan[nr] = inw(iobase + PC87427_REG_FAN);
	data->fan_min[nr] = inw(iobase + PC87427_REG_FAN_MIN);
	data->fan_status[nr] = inb(iobase + PC87427_REG_FAN_STATUS);
	/* Clear fan alarm bits */
	outb(data->fan_status[nr], iobase + PC87427_REG_FAN_STATUS);
}

/*
 * The 2 LSB of fan speed registers are used for something different.
 * The actual 2 LSB of the measurements are not available.
 */
static inline unsigned long fan_from_reg(u16 reg)
{
	reg &= 0xfffc;
	if (reg == 0x0000 || reg == 0xfffc)
		return 0;
	return 5400000UL / reg;
}

/* The 2 LSB of the fan speed limit registers are not significant. */
static inline u16 fan_to_reg(unsigned long val)
{
	if (val < 83UL)
		return 0xffff;
	if (val >= 1350000UL)
		return 0x0004;
	return ((1350000UL + val / 2) / val) << 2;
}

/*
 * PWM registers and conversions
 */

#define PC87427_REG_PWM_ENABLE		0x10
#define PC87427_REG_PWM_DUTY		0x12

#define PWM_ENABLE_MODE_MASK		(7 << 4)
#define PWM_ENABLE_CTLEN		(1 << 0)

#define PWM_MODE_MANUAL			(0 << 4)
#define PWM_MODE_AUTO			(1 << 4)
#define PWM_MODE_OFF			(2 << 4)
#define PWM_MODE_ON			(7 << 4)

/*
 * Dedicated function to read all registers related to a given PWM output.
 * This saves us quite a few locks and bank selections.
 * Must be called with data->lock held.
 * nr is from 0 to 3
 */
static void pc87427_readall_pwm(struct pc87427_data *data, u8 nr)
{
	int iobase = data->address[LD_FAN];

	outb(BANK_FC(nr), iobase + PC87427_REG_BANK);
	data->pwm_enable[nr] = inb(iobase + PC87427_REG_PWM_ENABLE);
	data->pwm[nr] = inb(iobase + PC87427_REG_PWM_DUTY);
}

static inline int pwm_enable_from_reg(u8 reg)
{
	switch (reg & PWM_ENABLE_MODE_MASK) {
	case PWM_MODE_ON:
		return 0;
	case PWM_MODE_MANUAL:
	case PWM_MODE_OFF:
		return 1;
	case PWM_MODE_AUTO:
		return 2;
	default:
		return -EPROTO;
	}
}

static inline u8 pwm_enable_to_reg(unsigned long val, u8 pwmval)
{
	switch (val) {
	default:
		return PWM_MODE_ON;
	case 1:
		return pwmval ? PWM_MODE_MANUAL : PWM_MODE_OFF;
	case 2:
		return PWM_MODE_AUTO;
	}
}

/*
 * Temperature registers and conversions
 */

#define PC87427_REG_TEMP_STATUS		0x10
#define PC87427_REG_TEMP		0x14
#define PC87427_REG_TEMP_MAX		0x18
#define PC87427_REG_TEMP_MIN		0x19
#define PC87427_REG_TEMP_CRIT		0x1a
#define PC87427_REG_TEMP_TYPE		0x1d

#define TEMP_STATUS_CHANEN		(1 << 0)
#define TEMP_STATUS_LOWFLG		(1 << 1)
#define TEMP_STATUS_HIGHFLG		(1 << 2)
#define TEMP_STATUS_CRITFLG		(1 << 3)
#define TEMP_STATUS_SENSERR		(1 << 5)
#define TEMP_TYPE_MASK			(3 << 5)

#define TEMP_TYPE_THERMISTOR		(1 << 5)
#define TEMP_TYPE_REMOTE_DIODE		(2 << 5)
#define TEMP_TYPE_LOCAL_DIODE		(3 << 5)

/*
 * Dedicated function to read all registers related to a given temperature
 * input. This saves us quite a few locks and bank selections.
 * Must be called with data->lock held.
 * nr is from 0 to 5
 */
static void pc87427_readall_temp(struct pc87427_data *data, u8 nr)
{
	int iobase = data->address[LD_TEMP];

	outb(BANK_TM(nr), iobase + PC87427_REG_BANK);
	data->temp[nr] = le16_to_cpu(inw(iobase + PC87427_REG_TEMP));
	data->temp_max[nr] = inb(iobase + PC87427_REG_TEMP_MAX);
	data->temp_min[nr] = inb(iobase + PC87427_REG_TEMP_MIN);
	data->temp_crit[nr] = inb(iobase + PC87427_REG_TEMP_CRIT);
	data->temp_type[nr] = inb(iobase + PC87427_REG_TEMP_TYPE);
	data->temp_status[nr] = inb(iobase + PC87427_REG_TEMP_STATUS);
	/* Clear fan alarm bits */
	outb(data->temp_status[nr], iobase + PC87427_REG_TEMP_STATUS);
}

static inline unsigned int temp_type_from_reg(u8 reg)
{
	switch (reg & TEMP_TYPE_MASK) {
	case TEMP_TYPE_THERMISTOR:
		return 4;
	case TEMP_TYPE_REMOTE_DIODE:
	case TEMP_TYPE_LOCAL_DIODE:
		return 3;
	default:
		return 0;
	}
}

/*
 * We assume 8-bit thermal sensors; 9-bit thermal sensors are possible
 * too, but I have no idea how to figure out when they are used.
 */
static inline long temp_from_reg(s16 reg)
{
	return reg * 1000 / 256;
}

static inline long temp_from_reg8(s8 reg)
{
	return reg * 1000;
}

/*
 * Data interface
 */

static struct pc87427_data *pc87427_update_device(struct device *dev)
{
	struct pc87427_data *data = dev_get_drvdata(dev);
	int i;

	mutex_lock(&data->lock);
	if (!time_after(jiffies, data->last_updated + HZ)
	 && data->last_updated)
		goto done;

	/* Fans */
	for (i = 0; i < 8; i++) {
		if (!(data->fan_enabled & (1 << i)))
			continue;
		pc87427_readall_fan(data, i);
	}

	/* PWM outputs */
	for (i = 0; i < 4; i++) {
		if (!(data->pwm_enabled & (1 << i)))
			continue;
		pc87427_readall_pwm(data, i);
	}

	/* Temperature channels */
	for (i = 0; i < 6; i++) {
		if (!(data->temp_enabled & (1 << i)))
			continue;
		pc87427_readall_temp(data, i);
	}

	data->last_updated = jiffies;

done:
	mutex_unlock(&data->lock);
	return data;
}

static ssize_t show_fan_input(struct device *dev, struct device_attribute
			      *devattr, char *buf)
{
	struct pc87427_data *data = pc87427_update_device(dev);
	int nr = to_sensor_dev_attr(devattr)->index;

	return sprintf(buf, "%lu\n", fan_from_reg(data->fan[nr]));
}

static ssize_t show_fan_min(struct device *dev, struct device_attribute
			    *devattr, char *buf)
{
	struct pc87427_data *data = pc87427_update_device(dev);
	int nr = to_sensor_dev_attr(devattr)->index;

	return sprintf(buf, "%lu\n", fan_from_reg(data->fan_min[nr]));
}

static ssize_t show_fan_alarm(struct device *dev, struct device_attribute
			      *devattr, char *buf)
{
	struct pc87427_data *data = pc87427_update_device(dev);
	int nr = to_sensor_dev_attr(devattr)->index;

	return sprintf(buf, "%d\n", !!(data->fan_status[nr]
				       & FAN_STATUS_LOSPD));
}

static ssize_t show_fan_fault(struct device *dev, struct device_attribute
			      *devattr, char *buf)
{
	struct pc87427_data *data = pc87427_update_device(dev);
	int nr = to_sensor_dev_attr(devattr)->index;

	return sprintf(buf, "%d\n", !!(data->fan_status[nr]
				       & FAN_STATUS_STALL));
}

static ssize_t set_fan_min(struct device *dev, struct device_attribute
			   *devattr, const char *buf, size_t count)
{
	struct pc87427_data *data = dev_get_drvdata(dev);
	int nr = to_sensor_dev_attr(devattr)->index;
	unsigned long val;
	int iobase = data->address[LD_FAN];

	if (kstrtoul(buf, 10, &val) < 0)
		return -EINVAL;

	mutex_lock(&data->lock);
	outb(BANK_FM(nr), iobase + PC87427_REG_BANK);
	/*
	 * The low speed limit registers are read-only while monitoring
	 * is enabled, so we have to disable monitoring, then change the
	 * limit, and finally enable monitoring again.
	 */
	outb(0, iobase + PC87427_REG_FAN_STATUS);
	data->fan_min[nr] = fan_to_reg(val);
	outw(data->fan_min[nr], iobase + PC87427_REG_FAN_MIN);
	outb(FAN_STATUS_MONEN, iobase + PC87427_REG_FAN_STATUS);
	mutex_unlock(&data->lock);

	return count;
}

static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan_input, NULL, 0);
static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, show_fan_input, NULL, 1);
static SENSOR_DEVICE_ATTR(fan3_input, S_IRUGO, show_fan_input, NULL, 2);
static SENSOR_DEVICE_ATTR(fan4_input, S_IRUGO, show_fan_input, NULL, 3);
static SENSOR_DEVICE_ATTR(fan5_input, S_IRUGO, show_fan_input, NULL, 4);
static SENSOR_DEVICE_ATTR(fan6_input, S_IRUGO, show_fan_input, NULL, 5);
static SENSOR_DEVICE_ATTR(fan7_input, S_IRUGO, show_fan_input, NULL, 6);
static SENSOR_DEVICE_ATTR(fan8_input, S_IRUGO, show_fan_input, NULL, 7);

static SENSOR_DEVICE_ATTR(fan1_min, S_IWUSR | S_IRUGO,
			  show_fan_min, set_fan_min, 0);
static SENSOR_DEVICE_ATTR(fan2_min, S_IWUSR | S_IRUGO,
			  show_fan_min, set_fan_min, 1);
static SENSOR_DEVICE_ATTR(fan3_min, S_IWUSR | S_IRUGO,
			  show_fan_min, set_fan_min, 2);
static SENSOR_DEVICE_ATTR(fan4_min, S_IWUSR | S_IRUGO,
			  show_fan_min, set_fan_min, 3);
static SENSOR_DEVICE_ATTR(fan5_min, S_IWUSR | S_IRUGO,
			  show_fan_min, set_fan_min, 4);
static SENSOR_DEVICE_ATTR(fan6_min, S_IWUSR | S_IRUGO,
			  show_fan_min, set_fan_min, 5);
static SENSOR_DEVICE_ATTR(fan7_min, S_IWUSR | S_IRUGO,
			  show_fan_min, set_fan_min, 6);
static SENSOR_DEVICE_ATTR(fan8_min, S_IWUSR | S_IRUGO,
			  show_fan_min, set_fan_min, 7);

static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_fan_alarm, NULL, 0);
static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_fan_alarm, NULL, 1);
static SENSOR_DEVICE_ATTR(fan3_alarm, S_IRUGO, show_fan_alarm, NULL, 2);
static SENSOR_DEVICE_ATTR(fan4_alarm, S_IRUGO, show_fan_alarm, NULL, 3);
static SENSOR_DEVICE_ATTR(fan5_alarm, S_IRUGO, show_fan_alarm, NULL, 4);
static SENSOR_DEVICE_ATTR(fan6_alarm, S_IRUGO, show_fan_alarm, NULL, 5);
static SENSOR_DEVICE_ATTR(fan7_alarm, S_IRUGO, show_fan_alarm, NULL, 6);
static SENSOR_DEVICE_ATTR(fan8_alarm, S_IRUGO, show_fan_alarm, NULL, 7);

static SENSOR_DEVICE_ATTR(fan1_fault, S_IRUGO, show_fan_fault, NULL, 0);
static SENSOR_DEVICE_ATTR(fan2_fault, S_IRUGO, show_fan_fault, NULL, 1);
static SENSOR_DEVICE_ATTR(fan3_fault, S_IRUGO, show_fan_fault, NULL, 2);
static SENSOR_DEVICE_ATTR(fan4_fault, S_IRUGO, show_fan_fault, NULL, 3);
static SENSOR_DEVICE_ATTR(fan5_fault, S_IRUGO, show_fan_fault, NULL, 4);
static SENSOR_DEVICE_ATTR(fan6_fault, S_IRUGO, show_fan_fault, NULL, 5);
static SENSOR_DEVICE_ATTR(fan7_fault, S_IRUGO, show_fan_fault, NULL, 6);
static SENSOR_DEVICE_ATTR(fan8_fault, S_IRUGO, show_fan_fault, NULL, 7);

static struct attribute *pc87427_attributes_fan[8][5] = {
	{
		&sensor_dev_attr_fan1_input.dev_attr.attr,
		&sensor_dev_attr_fan1_min.dev_attr.attr,
		&sensor_dev_attr_fan1_alarm.dev_attr.attr,
		&sensor_dev_attr_fan1_fault.dev_attr.attr,
		NULL
	}, {
		&sensor_dev_attr_fan2_input.dev_attr.attr,
		&sensor_dev_attr_fan2_min.dev_attr.attr,
		&sensor_dev_attr_fan2_alarm.dev_attr.attr,
		&sensor_dev_attr_fan2_fault.dev_attr.attr,
		NULL
	}, {
		&sensor_dev_attr_fan3_input.dev_attr.attr,
		&sensor_dev_attr_fan3_min.dev_attr.attr,
		&sensor_dev_attr_fan3_alarm.dev_attr.attr,
		&sensor_dev_attr_fan3_fault.dev_attr.attr,
		NULL
	}, {
		&sensor_dev_attr_fan4_input.dev_attr.attr,
		&sensor_dev_attr_fan4_min.dev_attr.attr,
		&sensor_dev_attr_fan4_alarm.dev_attr.attr,
		&sensor_dev_attr_fan4_fault.dev_attr.attr,
		NULL
	}, {
		&sensor_dev_attr_fan5_input.dev_attr.attr,
		&sensor_dev_attr_fan5_min.dev_attr.attr,
		&sensor_dev_attr_fan5_alarm.dev_attr.attr,
		&sensor_dev_attr_fan5_fault.dev_attr.attr,
		NULL
	}, {
		&sensor_dev_attr_fan6_input.dev_attr.attr,
		&sensor_dev_attr_fan6_min.dev_attr.attr,
		&sensor_dev_attr_fan6_alarm.dev_attr.attr,
		&sensor_dev_attr_fan6_fault.dev_attr.attr,
		NULL
	}, {
		&sensor_dev_attr_fan7_input.dev_attr.attr,
		&sensor_dev_attr_fan7_min.dev_attr.attr,
		&sensor_dev_attr_fan7_alarm.dev_attr.attr,
		&sensor_dev_attr_fan7_fault.dev_attr.attr,
		NULL
	}, {
		&sensor_dev_attr_fan8_input.dev_attr.attr,
		&sensor_dev_attr_fan8_min.dev_attr.attr,
		&sensor_dev_attr_fan8_alarm.dev_attr.attr,
		&sensor_dev_attr_fan8_fault.dev_attr.attr,
		NULL
	}
};

static const struct attribute_group pc87427_group_fan[8] = {
	{ .attrs = pc87427_attributes_fan[0] },
	{ .attrs = pc87427_attributes_fan[1] },
	{ .attrs = pc87427_attributes_fan[2] },
	{ .attrs = pc87427_attributes_fan[3] },
	{ .attrs = pc87427_attributes_fan[4] },
	{ .attrs = pc87427_attributes_fan[5] },
	{ .attrs = pc87427_attributes_fan[6] },
	{ .attrs = pc87427_attributes_fan[7] },
};

/*
 * Must be called with data->lock held and pc87427_readall_pwm() freshly
 * called
 */
static void update_pwm_enable(struct pc87427_data *data, int nr, u8 mode)
{
	int iobase = data->address[LD_FAN];
	data->pwm_enable[nr] &= ~PWM_ENABLE_MODE_MASK;
	data->pwm_enable[nr] |= mode;
	outb(data->pwm_enable[nr], iobase + PC87427_REG_PWM_ENABLE);
}

static ssize_t show_pwm_enable(struct device *dev, struct device_attribute
			       *devattr, char *buf)
{
	struct pc87427_data *data = pc87427_update_device(dev);
	int nr = to_sensor_dev_attr(devattr)->index;
	int pwm_enable;

	pwm_enable = pwm_enable_from_reg(data->pwm_enable[nr]);
	if (pwm_enable < 0)
		return pwm_enable;
	return sprintf(buf, "%d\n", pwm_enable);
}

static ssize_t set_pwm_enable(struct device *dev, struct device_attribute
			      *devattr, const char *buf, size_t count)
{
	struct pc87427_data *data = dev_get_drvdata(dev);
	int nr = to_sensor_dev_attr(devattr)->index;
	unsigned long val;

	if (kstrtoul(buf, 10, &val) < 0 || val > 2)
		return -EINVAL;
	/* Can't go to automatic mode if it isn't configured */
	if (val == 2 && !(data->pwm_auto_ok & (1 << nr)))
		return -EINVAL;

	mutex_lock(&data->lock);
	pc87427_readall_pwm(data, nr);
	update_pwm_enable(data, nr, pwm_enable_to_reg(val, data->pwm[nr]));
	mutex_unlock(&data->lock);

	return count;
}

static ssize_t show_pwm(struct device *dev, struct device_attribute
			*devattr, char *buf)
{
	struct pc87427_data *data = pc87427_update_device(dev);
	int nr = to_sensor_dev_attr(devattr)->index;

	return sprintf(buf, "%d\n", (int)data->pwm[nr]);
}

static ssize_t set_pwm(struct device *dev, struct device_attribute
		       *devattr, const char *buf, size_t count)
{
	struct pc87427_data *data = dev_get_drvdata(dev);
	int nr = to_sensor_dev_attr(devattr)->index;
	unsigned long val;
	int iobase = data->address[LD_FAN];
	u8 mode;

	if (kstrtoul(buf, 10, &val) < 0 || val > 0xff)
		return -EINVAL;

	mutex_lock(&data->lock);
	pc87427_readall_pwm(data, nr);
	mode = data->pwm_enable[nr] & PWM_ENABLE_MODE_MASK;
	if (mode != PWM_MODE_MANUAL && mode != PWM_MODE_OFF) {
		dev_notice(dev,
			   "Can't set PWM%d duty cycle while not in manual mode\n",
			   nr + 1);
		mutex_unlock(&data->lock);
		return -EPERM;
	}

	/* We may have to change the mode */
	if (mode == PWM_MODE_MANUAL && val == 0) {
		/* Transition from Manual to Off */
		update_pwm_enable(data, nr, PWM_MODE_OFF);
		mode = PWM_MODE_OFF;
		dev_dbg(dev, "Switching PWM%d from %s to %s\n", nr + 1,
			"manual", "off");
	} else if (mode == PWM_MODE_OFF && val != 0) {
		/* Transition from Off to Manual */
		update_pwm_enable(data, nr, PWM_MODE_MANUAL);
		mode = PWM_MODE_MANUAL;
		dev_dbg(dev, "Switching PWM%d from %s to %s\n", nr + 1,
			"off", "manual");
	}

	data->pwm[nr] = val;
	if (mode == PWM_MODE_MANUAL)
		outb(val, iobase + PC87427_REG_PWM_DUTY);
	mutex_unlock(&data->lock);

	return count;
}

static SENSOR_DEVICE_ATTR(pwm1_enable, S_IWUSR | S_IRUGO,
			  show_pwm_enable, set_pwm_enable, 0);
static SENSOR_DEVICE_ATTR(pwm2_enable, S_IWUSR | S_IRUGO,
			  show_pwm_enable, set_pwm_enable, 1);
static SENSOR_DEVICE_ATTR(pwm3_enable, S_IWUSR | S_IRUGO,
			  show_pwm_enable, set_pwm_enable, 2);
static SENSOR_DEVICE_ATTR(pwm4_enable, S_IWUSR | S_IRUGO,
			  show_pwm_enable, set_pwm_enable, 3);

static SENSOR_DEVICE_ATTR(pwm1, S_IWUSR | S_IRUGO, show_pwm, set_pwm, 0);
static SENSOR_DEVICE_ATTR(pwm2, S_IWUSR | S_IRUGO, show_pwm, set_pwm, 1);
static SENSOR_DEVICE_ATTR(pwm3, S_IWUSR | S_IRUGO, show_pwm, set_pwm, 2);
static SENSOR_DEVICE_ATTR(pwm4, S_IWUSR | S_IRUGO, show_pwm, set_pwm, 3);

static struct attribute *pc87427_attributes_pwm[4][3] = {
	{
		&sensor_dev_attr_pwm1_enable.dev_attr.attr,
		&sensor_dev_attr_pwm1.dev_attr.attr,
		NULL
	}, {
		&sensor_dev_attr_pwm2_enable.dev_attr.attr,
		&sensor_dev_attr_pwm2.dev_attr.attr,
		NULL
	}, {
		&sensor_dev_attr_pwm3_enable.dev_attr.attr,
		&sensor_dev_attr_pwm3.dev_attr.attr,
		NULL
	}, {
		&sensor_dev_attr_pwm4_enable.dev_attr.attr,
		&sensor_dev_attr_pwm4.dev_attr.attr,
		NULL
	}
};

static const struct attribute_group pc87427_group_pwm[4] = {
	{ .attrs = pc87427_attributes_pwm[0] },
	{ .attrs = pc87427_attributes_pwm[1] },
	{ .attrs = pc87427_attributes_pwm[2] },
	{ .attrs = pc87427_attributes_pwm[3] },
};

static ssize_t show_temp_input(struct device *dev, struct device_attribute
			       *devattr, char *buf)
{
	struct pc87427_data *data = pc87427_update_device(dev);
	int nr = to_sensor_dev_attr(devattr)->index;

	return sprintf(buf, "%ld\n", temp_from_reg(data->temp[nr]));
}

static ssize_t show_temp_min(struct device *dev, struct device_attribute
			     *devattr, char *buf)
{
	struct pc87427_data *data = pc87427_update_device(dev);
	int nr = to_sensor_dev_attr(devattr)->index;

	return sprintf(buf, "%ld\n", temp_from_reg8(data->temp_min[nr]));
}

static ssize_t show_temp_max(struct device *dev, struct device_attribute
			     *devattr, char *buf)
{
	struct pc87427_data *data = pc87427_update_device(dev);
	int nr = to_sensor_dev_attr(devattr)->index;

	return sprintf(buf, "%ld\n", temp_from_reg8(data->temp_max[nr]));
}

static ssize_t show_temp_crit(struct device *dev, struct device_attribute
			      *devattr, char *buf)
{
	struct pc87427_data *data = pc87427_update_device(dev);
	int nr = to_sensor_dev_attr(devattr)->index;

	return sprintf(buf, "%ld\n", temp_from_reg8(data->temp_crit[nr]));
}

static ssize_t show_temp_type(struct device *dev, struct device_attribute
			      *devattr, char *buf)
{
	struct pc87427_data *data = pc87427_update_device(dev);
	int nr = to_sensor_dev_attr(devattr)->index;

	return sprintf(buf, "%u\n", temp_type_from_reg(data->temp_type[nr]));
}

static ssize_t show_temp_min_alarm(struct device *dev, struct device_attribute
				   *devattr, char *buf)
{
	struct pc87427_data *data = pc87427_update_device(dev);
	int nr = to_sensor_dev_attr(devattr)->index;

	return sprintf(buf, "%d\n", !!(data->temp_status[nr]
				       & TEMP_STATUS_LOWFLG));
}

static ssize_t show_temp_max_alarm(struct device *dev, struct device_attribute
				   *devattr, char *buf)
{
	struct pc87427_data *data = pc87427_update_device(dev);
	int nr = to_sensor_dev_attr(devattr)->index;

	return sprintf(buf, "%d\n", !!(data->temp_status[nr]
				       & TEMP_STATUS_HIGHFLG));
}

static ssize_t show_temp_crit_alarm(struct device *dev, struct device_attribute
				   *devattr, char *buf)
{
	struct pc87427_data *data = pc87427_update_device(dev);
	int nr = to_sensor_dev_attr(devattr)->index;

	return sprintf(buf, "%d\n", !!(data->temp_status[nr]
				       & TEMP_STATUS_CRITFLG));
}

static ssize_t show_temp_fault(struct device *dev, struct device_attribute
			       *devattr, char *buf)
{
	struct pc87427_data *data = pc87427_update_device(dev);
	int nr = to_sensor_dev_attr(devattr)->index;

	return sprintf(buf, "%d\n", !!(data->temp_status[nr]
				       & TEMP_STATUS_SENSERR));
}

static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp_input, NULL, 0);
static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp_input, NULL, 1);
static SENSOR_DEVICE_ATTR(temp3_input, S_IRUGO, show_temp_input, NULL, 2);
static SENSOR_DEVICE_ATTR(temp4_input, S_IRUGO, show_temp_input, NULL, 3);
static SENSOR_DEVICE_ATTR(temp5_input, S_IRUGO, show_temp_input, NULL, 4);
static SENSOR_DEVICE_ATTR(temp6_input, S_IRUGO, show_temp_input, NULL, 5);

static SENSOR_DEVICE_ATTR(temp1_min, S_IRUGO, show_temp_min, NULL, 0);
static SENSOR_DEVICE_ATTR(temp2_min, S_IRUGO, show_temp_min, NULL, 1);
static SENSOR_DEVICE_ATTR(temp3_min, S_IRUGO, show_temp_min, NULL, 2);
static SENSOR_DEVICE_ATTR(temp4_min, S_IRUGO, show_temp_min, NULL, 3);
static SENSOR_DEVICE_ATTR(temp5_min, S_IRUGO, show_temp_min, NULL, 4);
static SENSOR_DEVICE_ATTR(temp6_min, S_IRUGO, show_temp_min, NULL, 5);

static SENSOR_DEVICE_ATTR(temp1_max, S_IRUGO, show_temp_max, NULL, 0);
static SENSOR_DEVICE_ATTR(temp2_max, S_IRUGO, show_temp_max, NULL, 1);
static SENSOR_DEVICE_ATTR(temp3_max, S_IRUGO, show_temp_max, NULL, 2);
static SENSOR_DEVICE_ATTR(temp4_max, S_IRUGO, show_temp_max, NULL, 3);
static SENSOR_DEVICE_ATTR(temp5_max, S_IRUGO, show_temp_max, NULL, 4);
static SENSOR_DEVICE_ATTR(temp6_max, S_IRUGO, show_temp_max, NULL, 5);

static SENSOR_DEVICE_ATTR(temp1_crit, S_IRUGO, show_temp_crit, NULL, 0);
static SENSOR_DEVICE_ATTR(temp2_crit, S_IRUGO, show_temp_crit, NULL, 1);
static SENSOR_DEVICE_ATTR(temp3_crit, S_IRUGO, show_temp_crit, NULL, 2);
static SENSOR_DEVICE_ATTR(temp4_crit, S_IRUGO, show_temp_crit, NULL, 3);
static SENSOR_DEVICE_ATTR(temp5_crit, S_IRUGO, show_temp_crit, NULL, 4);
static SENSOR_DEVICE_ATTR(temp6_crit, S_IRUGO, show_temp_crit, NULL, 5);

static SENSOR_DEVICE_ATTR(temp1_type, S_IRUGO, show_temp_type, NULL, 0);
static SENSOR_DEVICE_ATTR(temp2_type, S_IRUGO, show_temp_type, NULL, 1);
static SENSOR_DEVICE_ATTR(temp3_type, S_IRUGO, show_temp_type, NULL, 2);
static SENSOR_DEVICE_ATTR(temp4_type, S_IRUGO, show_temp_type, NULL, 3);
static SENSOR_DEVICE_ATTR(temp5_type, S_IRUGO, show_temp_type, NULL, 4);
static SENSOR_DEVICE_ATTR(temp6_type, S_IRUGO, show_temp_type, NULL, 5);

static SENSOR_DEVICE_ATTR(temp1_min_alarm, S_IRUGO,
			  show_temp_min_alarm, NULL, 0);
static SENSOR_DEVICE_ATTR(temp2_min_alarm, S_IRUGO,
			  show_temp_min_alarm, NULL, 1);
static SENSOR_DEVICE_ATTR(temp3_min_alarm, S_IRUGO,
			  show_temp_min_alarm, NULL, 2);
static SENSOR_DEVICE_ATTR(temp4_min_alarm, S_IRUGO,
			  show_temp_min_alarm, NULL, 3);
static SENSOR_DEVICE_ATTR(temp5_min_alarm, S_IRUGO,
			  show_temp_min_alarm, NULL, 4);
static SENSOR_DEVICE_ATTR(temp6_min_alarm, S_IRUGO,
			  show_temp_min_alarm, NULL, 5);

static SENSOR_DEVICE_ATTR(temp1_max_alarm, S_IRUGO,
			  show_temp_max_alarm, NULL, 0);
static SENSOR_DEVICE_ATTR(temp2_max_alarm, S_IRUGO,
			  show_temp_max_alarm, NULL, 1);
static SENSOR_DEVICE_ATTR(temp3_max_alarm, S_IRUGO,
			  show_temp_max_alarm, NULL, 2);
static SENSOR_DEVICE_ATTR(temp4_max_alarm, S_IRUGO,
			  show_temp_max_alarm, NULL, 3);
static SENSOR_DEVICE_ATTR(temp5_max_alarm, S_IRUGO,
			  show_temp_max_alarm, NULL, 4);
static SENSOR_DEVICE_ATTR(temp6_max_alarm, S_IRUGO,
			  show_temp_max_alarm, NULL, 5);

static SENSOR_DEVICE_ATTR(temp1_crit_alarm, S_IRUGO,
			  show_temp_crit_alarm, NULL, 0);
static SENSOR_DEVICE_ATTR(temp2_crit_alarm, S_IRUGO,
			  show_temp_crit_alarm, NULL, 1);
static SENSOR_DEVICE_ATTR(temp3_crit_alarm, S_IRUGO,
			  show_temp_crit_alarm, NULL, 2);
static SENSOR_DEVICE_ATTR(temp4_crit_alarm, S_IRUGO,
			  show_temp_crit_alarm, NULL, 3);
static SENSOR_DEVICE_ATTR(temp5_crit_alarm, S_IRUGO,
			  show_temp_crit_alarm, NULL, 4);
static SENSOR_DEVICE_ATTR(temp6_crit_alarm, S_IRUGO,
			  show_temp_crit_alarm, NULL, 5);

static SENSOR_DEVICE_ATTR(temp1_fault, S_IRUGO, show_temp_fault, NULL, 0);
static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_temp_fault, NULL, 1);
static SENSOR_DEVICE_ATTR(temp3_fault, S_IRUGO, show_temp_fault, NULL, 2);
static SENSOR_DEVICE_ATTR(temp4_fault, S_IRUGO, show_temp_fault, NULL, 3);
static SENSOR_DEVICE_ATTR(temp5_fault, S_IRUGO, show_temp_fault, NULL, 4);
static SENSOR_DEVICE_ATTR(temp6_fault, S_IRUGO, show_temp_fault, NULL, 5);

static struct attribute *pc87427_attributes_temp[6][10] = {
	{
		&sensor_dev_attr_temp1_input.dev_attr.attr,
		&sensor_dev_attr_temp1_min.dev_attr.attr,
		&sensor_dev_attr_temp1_max.dev_attr.attr,
		&sensor_dev_attr_temp1_crit.dev_attr.attr,
		&sensor_dev_attr_temp1_type.dev_attr.attr,
		&sensor_dev_attr_temp1_min_alarm.dev_attr.attr,
		&sensor_dev_attr_temp1_max_alarm.dev_attr.attr,
		&sensor_dev_attr_temp1_crit_alarm.dev_attr.attr,
		&sensor_dev_attr_temp1_fault.dev_attr.attr,
		NULL
	}, {
		&sensor_dev_attr_temp2_input.dev_attr.attr,
		&sensor_dev_attr_temp2_min.dev_attr.attr,
		&sensor_dev_attr_temp2_max.dev_attr.attr,
		&sensor_dev_attr_temp2_crit.dev_attr.attr,
		&sensor_dev_attr_temp2_type.dev_attr.attr,
		&sensor_dev_attr_temp2_min_alarm.dev_attr.attr,
		&sensor_dev_attr_temp2_max_alarm.dev_attr.attr,
		&sensor_dev_attr_temp2_crit_alarm.dev_attr.attr,
		&sensor_dev_attr_temp2_fault.dev_attr.attr,
		NULL
	}, {
		&sensor_dev_attr_temp3_input.dev_attr.attr,
		&sensor_dev_attr_temp3_min.dev_attr.attr,
		&sensor_dev_attr_temp3_max.dev_attr.attr,
		&sensor_dev_attr_temp3_crit.dev_attr.attr,
		&sensor_dev_attr_temp3_type.dev_attr.attr,
		&sensor_dev_attr_temp3_min_alarm.dev_attr.attr,
		&sensor_dev_attr_temp3_max_alarm.dev_attr.attr,
		&sensor_dev_attr_temp3_crit_alarm.dev_attr.attr,
		&sensor_dev_attr_temp3_fault.dev_attr.attr,
		NULL
	}, {
		&sensor_dev_attr_temp4_input.dev_attr.attr,
		&sensor_dev_attr_temp4_min.dev_attr.attr,
		&sensor_dev_attr_temp4_max.dev_attr.attr,
		&sensor_dev_attr_temp4_crit.dev_attr.attr,
		&sensor_dev_attr_temp4_type.dev_attr.attr,
		&sensor_dev_attr_temp4_min_alarm.dev_attr.attr,
		&sensor_dev_attr_temp4_max_alarm.dev_attr.attr,
		&sensor_dev_attr_temp4_crit_alarm.dev_attr.attr,
		&sensor_dev_attr_temp4_fault.dev_attr.attr,
		NULL
	}, {
		&sensor_dev_attr_temp5_input.dev_attr.attr,
		&sensor_dev_attr_temp5_min.dev_attr.attr,
		&sensor_dev_attr_temp5_max.dev_attr.attr,
		&sensor_dev_attr_temp5_crit.dev_attr.attr,
		&sensor_dev_attr_temp5_type.dev_attr.attr,
		&sensor_dev_attr_temp5_min_alarm.dev_attr.attr,
		&sensor_dev_attr_temp5_max_alarm.dev_attr.attr,
		&sensor_dev_attr_temp5_crit_alarm.dev_attr.attr,
		&sensor_dev_attr_temp5_fault.dev_attr.attr,
		NULL
	}, {
		&sensor_dev_attr_temp6_input.dev_attr.attr,
		&sensor_dev_attr_temp6_min.dev_attr.attr,
		&sensor_dev_attr_temp6_max.dev_attr.attr,
		&sensor_dev_attr_temp6_crit.dev_attr.attr,
		&sensor_dev_attr_temp6_type.dev_attr.attr,
		&sensor_dev_attr_temp6_min_alarm.dev_attr.attr,
		&sensor_dev_attr_temp6_max_alarm.dev_attr.attr,
		&sensor_dev_attr_temp6_crit_alarm.dev_attr.attr,
		&sensor_dev_attr_temp6_fault.dev_attr.attr,
		NULL
	}
};

static const struct attribute_group pc87427_group_temp[6] = {
	{ .attrs = pc87427_attributes_temp[0] },
	{ .attrs = pc87427_attributes_temp[1] },
	{ .attrs = pc87427_attributes_temp[2] },
	{ .attrs = pc87427_attributes_temp[3] },
	{ .attrs = pc87427_attributes_temp[4] },
	{ .attrs = pc87427_attributes_temp[5] },
};

static ssize_t show_name(struct device *dev, struct device_attribute
			 *devattr, char *buf)
{
	struct pc87427_data *data = dev_get_drvdata(dev);

	return sprintf(buf, "%s\n", data->name);
}
static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);


/*
 * Device detection, attach and detach
 */

static int pc87427_request_regions(struct platform_device *pdev,
					     int count)
{
	struct resource *res;
	int i;

	for (i = 0; i < count; i++) {
		res = platform_get_resource(pdev, IORESOURCE_IO, i);
		if (!res) {
			dev_err(&pdev->dev, "Missing resource #%d\n", i);
			return -ENOENT;
		}
		if (!devm_request_region(&pdev->dev, res->start,
					 resource_size(res), DRVNAME)) {
			dev_err(&pdev->dev,
				"Failed to request region 0x%lx-0x%lx\n",
				(unsigned long)res->start,
				(unsigned long)res->end);
			return -EBUSY;
		}
	}
	return 0;
}

static void pc87427_init_device(struct device *dev)
{
	struct pc87427_sio_data *sio_data = dev_get_platdata(dev);
	struct pc87427_data *data = dev_get_drvdata(dev);
	int i;
	u8 reg;

	/* The FMC module should be ready */
	reg = pc87427_read8(data, LD_FAN, PC87427_REG_BANK);
	if (!(reg & 0x80))
		dev_warn(dev, "%s module not ready!\n", "FMC");

	/* Check which fans are enabled */
	for (i = 0; i < 8; i++) {
		if (!(sio_data->has_fanin & (1 << i)))	/* Not wired */
			continue;
		reg = pc87427_read8_bank(data, LD_FAN, BANK_FM(i),
					 PC87427_REG_FAN_STATUS);
		if (reg & FAN_STATUS_MONEN)
			data->fan_enabled |= (1 << i);
	}

	if (!data->fan_enabled) {
		dev_dbg(dev, "Enabling monitoring of all fans\n");
		for (i = 0; i < 8; i++) {
			if (!(sio_data->has_fanin & (1 << i)))	/* Not wired */
				continue;
			pc87427_write8_bank(data, LD_FAN, BANK_FM(i),
					    PC87427_REG_FAN_STATUS,
					    FAN_STATUS_MONEN);
		}
		data->fan_enabled = sio_data->has_fanin;
	}

	/* Check which PWM outputs are enabled */
	for (i = 0; i < 4; i++) {
		if (!(sio_data->has_fanout & (1 << i)))	/* Not wired */
			continue;
		reg = pc87427_read8_bank(data, LD_FAN, BANK_FC(i),
					 PC87427_REG_PWM_ENABLE);
		if (reg & PWM_ENABLE_CTLEN)
			data->pwm_enabled |= (1 << i);

		/*
		 * We don't expose an interface to reconfigure the automatic
		 * fan control mode, so only allow to return to this mode if
		 * it was originally set.
		 */
		if ((reg & PWM_ENABLE_MODE_MASK) == PWM_MODE_AUTO) {
			dev_dbg(dev, "PWM%d is in automatic control mode\n",
				i + 1);
			data->pwm_auto_ok |= (1 << i);
		}
	}

	/* The HMC module should be ready */
	reg = pc87427_read8(data, LD_TEMP, PC87427_REG_BANK);
	if (!(reg & 0x80))
		dev_warn(dev, "%s module not ready!\n", "HMC");

	/* Check which temperature channels are enabled */
	for (i = 0; i < 6; i++) {
		reg = pc87427_read8_bank(data, LD_TEMP, BANK_TM(i),
					 PC87427_REG_TEMP_STATUS);
		if (reg & TEMP_STATUS_CHANEN)
			data->temp_enabled |= (1 << i);
	}
}

static void pc87427_remove_files(struct device *dev)
{
	struct pc87427_data *data = dev_get_drvdata(dev);
	int i;

	device_remove_file(dev, &dev_attr_name);
	for (i = 0; i < 8; i++) {
		if (!(data->fan_enabled & (1 << i)))
			continue;
		sysfs_remove_group(&dev->kobj, &pc87427_group_fan[i]);
	}
	for (i = 0; i < 4; i++) {
		if (!(data->pwm_enabled & (1 << i)))
			continue;
		sysfs_remove_group(&dev->kobj, &pc87427_group_pwm[i]);
	}
	for (i = 0; i < 6; i++) {
		if (!(data->temp_enabled & (1 << i)))
			continue;
		sysfs_remove_group(&dev->kobj, &pc87427_group_temp[i]);
	}
}

static int pc87427_probe(struct platform_device *pdev)
{
	struct pc87427_sio_data *sio_data = dev_get_platdata(&pdev->dev);
	struct pc87427_data *data;
	int i, err, res_count;

	data = devm_kzalloc(&pdev->dev, sizeof(struct pc87427_data),
			    GFP_KERNEL);
	if (!data)
		return -ENOMEM;

	data->address[0] = sio_data->address[0];
	data->address[1] = sio_data->address[1];
	res_count = (data->address[0] != 0) + (data->address[1] != 0);

	err = pc87427_request_regions(pdev, res_count);
	if (err)
		return err;

	mutex_init(&data->lock);
	data->name = "pc87427";
	platform_set_drvdata(pdev, data);
	pc87427_init_device(&pdev->dev);

	/* Register sysfs hooks */
	err = device_create_file(&pdev->dev, &dev_attr_name);
	if (err)
		return err;
	for (i = 0; i < 8; i++) {
		if (!(data->fan_enabled & (1 << i)))
			continue;
		err = sysfs_create_group(&pdev->dev.kobj,
					 &pc87427_group_fan[i]);
		if (err)
			goto exit_remove_files;
	}
	for (i = 0; i < 4; i++) {
		if (!(data->pwm_enabled & (1 << i)))
			continue;
		err = sysfs_create_group(&pdev->dev.kobj,
					 &pc87427_group_pwm[i]);
		if (err)
			goto exit_remove_files;
	}
	for (i = 0; i < 6; i++) {
		if (!(data->temp_enabled & (1 << i)))
			continue;
		err = sysfs_create_group(&pdev->dev.kobj,
					 &pc87427_group_temp[i]);
		if (err)
			goto exit_remove_files;
	}

	data->hwmon_dev = hwmon_device_register(&pdev->dev);
	if (IS_ERR(data->hwmon_dev)) {
		err = PTR_ERR(data->hwmon_dev);
		dev_err(&pdev->dev, "Class registration failed (%d)\n", err);
		goto exit_remove_files;
	}

	return 0;

exit_remove_files:
	pc87427_remove_files(&pdev->dev);
	return err;
}

static int pc87427_remove(struct platform_device *pdev)
{
	struct pc87427_data *data = platform_get_drvdata(pdev);

	hwmon_device_unregister(data->hwmon_dev);
	pc87427_remove_files(&pdev->dev);

	return 0;
}


static struct platform_driver pc87427_driver = {
	.driver = {
		.name	= DRVNAME,
	},
	.probe		= pc87427_probe,
	.remove		= pc87427_remove,
};

static int __init pc87427_device_add(const struct pc87427_sio_data *sio_data)
{
	struct resource res[2] = {
		{ .flags	= IORESOURCE_IO },
		{ .flags	= IORESOURCE_IO },
	};
	int err, i, res_count;

	res_count = 0;
	for (i = 0; i < 2; i++) {
		if (!sio_data->address[i])
			continue;
		res[res_count].start = sio_data->address[i];
		res[res_count].end = sio_data->address[i] + REGION_LENGTH - 1;
		res[res_count].name = logdev_str[i];

		err = acpi_check_resource_conflict(&res[res_count]);
		if (err)
			goto exit;

		res_count++;
	}

	pdev = platform_device_alloc(DRVNAME, res[0].start);
	if (!pdev) {
		err = -ENOMEM;
		pr_err("Device allocation failed\n");
		goto exit;
	}

	err = platform_device_add_resources(pdev, res, res_count);
	if (err) {
		pr_err("Device resource addition failed (%d)\n", err);
		goto exit_device_put;
	}

	err = platform_device_add_data(pdev, sio_data,
				       sizeof(struct pc87427_sio_data));
	if (err) {
		pr_err("Platform data allocation failed\n");
		goto exit_device_put;
	}

	err = platform_device_add(pdev);
	if (err) {
		pr_err("Device addition failed (%d)\n", err);
		goto exit_device_put;
	}

	return 0;

exit_device_put:
	platform_device_put(pdev);
exit:
	return err;
}

static int __init pc87427_find(int sioaddr, struct pc87427_sio_data *sio_data)
{
	u16 val;
	u8 cfg, cfg_b;
	int i, err = 0;

	/* Identify device */
	val = force_id ? force_id : superio_inb(sioaddr, SIOREG_DEVID);
	if (val != 0xf2) {	/* PC87427 */
		err = -ENODEV;
		goto exit;
	}

	for (i = 0; i < 2; i++) {
		sio_data->address[i] = 0;
		/* Select logical device */
		superio_outb(sioaddr, SIOREG_LDSEL, logdev[i]);

		val = superio_inb(sioaddr, SIOREG_ACT);
		if (!(val & 0x01)) {
			pr_info("Logical device 0x%02x not activated\n",
				logdev[i]);
			continue;
		}

		val = superio_inb(sioaddr, SIOREG_MAP);
		if (val & 0x01) {
			pr_warn("Logical device 0x%02x is memory-mapped, can't use\n",
				logdev[i]);
			continue;
		}

		val = (superio_inb(sioaddr, SIOREG_IOBASE) << 8)
		    | superio_inb(sioaddr, SIOREG_IOBASE + 1);
		if (!val) {
			pr_info("I/O base address not set for logical device 0x%02x\n",
				logdev[i]);
			continue;
		}
		sio_data->address[i] = val;
	}

	/* No point in loading the driver if everything is disabled */
	if (!sio_data->address[0] && !sio_data->address[1]) {
		err = -ENODEV;
		goto exit;
	}

	/* Check which fan inputs are wired */
	sio_data->has_fanin = (1 << 2) | (1 << 3);	/* FANIN2, FANIN3 */

	cfg = superio_inb(sioaddr, SIOREG_CF2);
	if (!(cfg & (1 << 3)))
		sio_data->has_fanin |= (1 << 0);	/* FANIN0 */
	if (!(cfg & (1 << 2)))
		sio_data->has_fanin |= (1 << 4);	/* FANIN4 */

	cfg = superio_inb(sioaddr, SIOREG_CFD);
	if (!(cfg & (1 << 0)))
		sio_data->has_fanin |= (1 << 1);	/* FANIN1 */

	cfg = superio_inb(sioaddr, SIOREG_CF4);
	if (!(cfg & (1 << 0)))
		sio_data->has_fanin |= (1 << 7);	/* FANIN7 */
	cfg_b = superio_inb(sioaddr, SIOREG_CFB);
	if (!(cfg & (1 << 1)) && (cfg_b & (1 << 3)))
		sio_data->has_fanin |= (1 << 5);	/* FANIN5 */
	cfg = superio_inb(sioaddr, SIOREG_CF3);
	if ((cfg & (1 << 3)) && !(cfg_b & (1 << 5)))
		sio_data->has_fanin |= (1 << 6);	/* FANIN6 */

	/* Check which fan outputs are wired */
	sio_data->has_fanout = (1 << 0);		/* FANOUT0 */
	if (cfg_b & (1 << 0))
		sio_data->has_fanout |= (1 << 3);	/* FANOUT3 */

	cfg = superio_inb(sioaddr, SIOREG_CFC);
	if (!(cfg & (1 << 4))) {
		if (cfg_b & (1 << 1))
			sio_data->has_fanout |= (1 << 1); /* FANOUT1 */
		if (cfg_b & (1 << 2))
			sio_data->has_fanout |= (1 << 2); /* FANOUT2 */
	}

	/* FANOUT1 and FANOUT2 can each be routed to 2 different pins */
	cfg = superio_inb(sioaddr, SIOREG_CF5);
	if (cfg & (1 << 6))
		sio_data->has_fanout |= (1 << 1);	/* FANOUT1 */
	if (cfg & (1 << 5))
		sio_data->has_fanout |= (1 << 2);	/* FANOUT2 */

exit:
	superio_exit(sioaddr);
	return err;
}

static int __init pc87427_init(void)
{
	int err;
	struct pc87427_sio_data sio_data;

	if (pc87427_find(0x2e, &sio_data)
	 && pc87427_find(0x4e, &sio_data))
		return -ENODEV;

	err = platform_driver_register(&pc87427_driver);
	if (err)
		goto exit;

	/* Sets global pdev as a side effect */
	err = pc87427_device_add(&sio_data);
	if (err)
		goto exit_driver;

	return 0;

exit_driver:
	platform_driver_unregister(&pc87427_driver);
exit:
	return err;
}

static void __exit pc87427_exit(void)
{
	platform_device_unregister(pdev);
	platform_driver_unregister(&pc87427_driver);
}

MODULE_AUTHOR("Jean Delvare <jdelvare@suse.de>");
MODULE_DESCRIPTION("PC87427 hardware monitoring driver");
MODULE_LICENSE("GPL");

module_init(pc87427_init);
module_exit(pc87427_exit);