1330 lines · c
1// SPDX-License-Identifier: GPL-2.0-only2/*3 * pc87427.c - hardware monitoring driver for the4 * National Semiconductor PC87427 Super-I/O chip5 * Copyright (C) 2006, 2008, 2010 Jean Delvare <jdelvare@suse.de>6 *7 * Supports the following chips:8 *9 * Chip #vin #fan #pwm #temp devid10 * PC87427 - 8 4 6 0xF211 *12 * This driver assumes that no more than one chip is present.13 * Only fans are fully supported so far. Temperatures are in read-only14 * mode, and voltages aren't supported at all.15 */16 17#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt18 19#include <linux/module.h>20#include <linux/init.h>21#include <linux/slab.h>22#include <linux/jiffies.h>23#include <linux/platform_device.h>24#include <linux/hwmon.h>25#include <linux/hwmon-sysfs.h>26#include <linux/err.h>27#include <linux/mutex.h>28#include <linux/sysfs.h>29#include <linux/ioport.h>30#include <linux/acpi.h>31#include <linux/io.h>32 33static unsigned short force_id;34module_param(force_id, ushort, 0);35MODULE_PARM_DESC(force_id, "Override the detected device ID");36 37static struct platform_device *pdev;38 39#define DRVNAME "pc87427"40 41/*42 * The lock mutex protects both the I/O accesses (needed because the43 * device is using banked registers) and the register cache (needed to keep44 * the data in the registers and the cache in sync at any time).45 */46struct pc87427_data {47 struct device *hwmon_dev;48 struct mutex lock;49 int address[2];50 const char *name;51 52 unsigned long last_updated; /* in jiffies */53 u8 fan_enabled; /* bit vector */54 u16 fan[8]; /* register values */55 u16 fan_min[8]; /* register values */56 u8 fan_status[8]; /* register values */57 58 u8 pwm_enabled; /* bit vector */59 u8 pwm_auto_ok; /* bit vector */60 u8 pwm_enable[4]; /* register values */61 u8 pwm[4]; /* register values */62 63 u8 temp_enabled; /* bit vector */64 s16 temp[6]; /* register values */65 s8 temp_min[6]; /* register values */66 s8 temp_max[6]; /* register values */67 s8 temp_crit[6]; /* register values */68 u8 temp_status[6]; /* register values */69 u8 temp_type[6]; /* register values */70};71 72struct pc87427_sio_data {73 unsigned short address[2];74 u8 has_fanin;75 u8 has_fanout;76};77 78/*79 * Super-I/O registers and operations80 */81 82#define SIOREG_LDSEL 0x07 /* Logical device select */83#define SIOREG_DEVID 0x20 /* Device ID */84#define SIOREG_CF2 0x22 /* Configuration 2 */85#define SIOREG_CF3 0x23 /* Configuration 3 */86#define SIOREG_CF4 0x24 /* Configuration 4 */87#define SIOREG_CF5 0x25 /* Configuration 5 */88#define SIOREG_CFB 0x2B /* Configuration B */89#define SIOREG_CFC 0x2C /* Configuration C */90#define SIOREG_CFD 0x2D /* Configuration D */91#define SIOREG_ACT 0x30 /* Device activation */92#define SIOREG_MAP 0x50 /* I/O or memory mapping */93#define SIOREG_IOBASE 0x60 /* I/O base address */94 95static const u8 logdev[2] = { 0x09, 0x14 };96static const char *logdev_str[2] = { DRVNAME " FMC", DRVNAME " HMC" };97#define LD_FAN 098#define LD_IN 199#define LD_TEMP 1100 101static inline int superio_enter(int sioaddr)102{103 if (!request_muxed_region(sioaddr, 2, DRVNAME))104 return -EBUSY;105 return 0;106}107 108static inline void superio_outb(int sioaddr, int reg, int val)109{110 outb(reg, sioaddr);111 outb(val, sioaddr + 1);112}113 114static inline int superio_inb(int sioaddr, int reg)115{116 outb(reg, sioaddr);117 return inb(sioaddr + 1);118}119 120static inline void superio_exit(int sioaddr)121{122 outb(0x02, sioaddr);123 outb(0x02, sioaddr + 1);124 release_region(sioaddr, 2);125}126 127/*128 * Logical devices129 */130 131#define REGION_LENGTH 32132#define PC87427_REG_BANK 0x0f133#define BANK_FM(nr) (nr)134#define BANK_FT(nr) (0x08 + (nr))135#define BANK_FC(nr) (0x10 + (nr) * 2)136#define BANK_TM(nr) (nr)137#define BANK_VM(nr) (0x08 + (nr))138 139/*140 * I/O access functions141 */142 143/* ldi is the logical device index */144static inline int pc87427_read8(struct pc87427_data *data, u8 ldi, u8 reg)145{146 return inb(data->address[ldi] + reg);147}148 149/* Must be called with data->lock held, except during init */150static inline int pc87427_read8_bank(struct pc87427_data *data, u8 ldi,151 u8 bank, u8 reg)152{153 outb(bank, data->address[ldi] + PC87427_REG_BANK);154 return inb(data->address[ldi] + reg);155}156 157/* Must be called with data->lock held, except during init */158static inline void pc87427_write8_bank(struct pc87427_data *data, u8 ldi,159 u8 bank, u8 reg, u8 value)160{161 outb(bank, data->address[ldi] + PC87427_REG_BANK);162 outb(value, data->address[ldi] + reg);163}164 165/*166 * Fan registers and conversions167 */168 169/* fan data registers are 16-bit wide */170#define PC87427_REG_FAN 0x12171#define PC87427_REG_FAN_MIN 0x14172#define PC87427_REG_FAN_STATUS 0x10173 174#define FAN_STATUS_STALL (1 << 3)175#define FAN_STATUS_LOSPD (1 << 1)176#define FAN_STATUS_MONEN (1 << 0)177 178/*179 * Dedicated function to read all registers related to a given fan input.180 * This saves us quite a few locks and bank selections.181 * Must be called with data->lock held.182 * nr is from 0 to 7183 */184static void pc87427_readall_fan(struct pc87427_data *data, u8 nr)185{186 int iobase = data->address[LD_FAN];187 188 outb(BANK_FM(nr), iobase + PC87427_REG_BANK);189 data->fan[nr] = inw(iobase + PC87427_REG_FAN);190 data->fan_min[nr] = inw(iobase + PC87427_REG_FAN_MIN);191 data->fan_status[nr] = inb(iobase + PC87427_REG_FAN_STATUS);192 /* Clear fan alarm bits */193 outb(data->fan_status[nr], iobase + PC87427_REG_FAN_STATUS);194}195 196/*197 * The 2 LSB of fan speed registers are used for something different.198 * The actual 2 LSB of the measurements are not available.199 */200static inline unsigned long fan_from_reg(u16 reg)201{202 reg &= 0xfffc;203 if (reg == 0x0000 || reg == 0xfffc)204 return 0;205 return 5400000UL / reg;206}207 208/* The 2 LSB of the fan speed limit registers are not significant. */209static inline u16 fan_to_reg(unsigned long val)210{211 if (val < 83UL)212 return 0xffff;213 if (val >= 1350000UL)214 return 0x0004;215 return ((1350000UL + val / 2) / val) << 2;216}217 218/*219 * PWM registers and conversions220 */221 222#define PC87427_REG_PWM_ENABLE 0x10223#define PC87427_REG_PWM_DUTY 0x12224 225#define PWM_ENABLE_MODE_MASK (7 << 4)226#define PWM_ENABLE_CTLEN (1 << 0)227 228#define PWM_MODE_MANUAL (0 << 4)229#define PWM_MODE_AUTO (1 << 4)230#define PWM_MODE_OFF (2 << 4)231#define PWM_MODE_ON (7 << 4)232 233/*234 * Dedicated function to read all registers related to a given PWM output.235 * This saves us quite a few locks and bank selections.236 * Must be called with data->lock held.237 * nr is from 0 to 3238 */239static void pc87427_readall_pwm(struct pc87427_data *data, u8 nr)240{241 int iobase = data->address[LD_FAN];242 243 outb(BANK_FC(nr), iobase + PC87427_REG_BANK);244 data->pwm_enable[nr] = inb(iobase + PC87427_REG_PWM_ENABLE);245 data->pwm[nr] = inb(iobase + PC87427_REG_PWM_DUTY);246}247 248static inline int pwm_enable_from_reg(u8 reg)249{250 switch (reg & PWM_ENABLE_MODE_MASK) {251 case PWM_MODE_ON:252 return 0;253 case PWM_MODE_MANUAL:254 case PWM_MODE_OFF:255 return 1;256 case PWM_MODE_AUTO:257 return 2;258 default:259 return -EPROTO;260 }261}262 263static inline u8 pwm_enable_to_reg(unsigned long val, u8 pwmval)264{265 switch (val) {266 default:267 return PWM_MODE_ON;268 case 1:269 return pwmval ? PWM_MODE_MANUAL : PWM_MODE_OFF;270 case 2:271 return PWM_MODE_AUTO;272 }273}274 275/*276 * Temperature registers and conversions277 */278 279#define PC87427_REG_TEMP_STATUS 0x10280#define PC87427_REG_TEMP 0x14281#define PC87427_REG_TEMP_MAX 0x18282#define PC87427_REG_TEMP_MIN 0x19283#define PC87427_REG_TEMP_CRIT 0x1a284#define PC87427_REG_TEMP_TYPE 0x1d285 286#define TEMP_STATUS_CHANEN (1 << 0)287#define TEMP_STATUS_LOWFLG (1 << 1)288#define TEMP_STATUS_HIGHFLG (1 << 2)289#define TEMP_STATUS_CRITFLG (1 << 3)290#define TEMP_STATUS_SENSERR (1 << 5)291#define TEMP_TYPE_MASK (3 << 5)292 293#define TEMP_TYPE_THERMISTOR (1 << 5)294#define TEMP_TYPE_REMOTE_DIODE (2 << 5)295#define TEMP_TYPE_LOCAL_DIODE (3 << 5)296 297/*298 * Dedicated function to read all registers related to a given temperature299 * input. This saves us quite a few locks and bank selections.300 * Must be called with data->lock held.301 * nr is from 0 to 5302 */303static void pc87427_readall_temp(struct pc87427_data *data, u8 nr)304{305 int iobase = data->address[LD_TEMP];306 307 outb(BANK_TM(nr), iobase + PC87427_REG_BANK);308 data->temp[nr] = le16_to_cpu(inw(iobase + PC87427_REG_TEMP));309 data->temp_max[nr] = inb(iobase + PC87427_REG_TEMP_MAX);310 data->temp_min[nr] = inb(iobase + PC87427_REG_TEMP_MIN);311 data->temp_crit[nr] = inb(iobase + PC87427_REG_TEMP_CRIT);312 data->temp_type[nr] = inb(iobase + PC87427_REG_TEMP_TYPE);313 data->temp_status[nr] = inb(iobase + PC87427_REG_TEMP_STATUS);314 /* Clear fan alarm bits */315 outb(data->temp_status[nr], iobase + PC87427_REG_TEMP_STATUS);316}317 318static inline unsigned int temp_type_from_reg(u8 reg)319{320 switch (reg & TEMP_TYPE_MASK) {321 case TEMP_TYPE_THERMISTOR:322 return 4;323 case TEMP_TYPE_REMOTE_DIODE:324 case TEMP_TYPE_LOCAL_DIODE:325 return 3;326 default:327 return 0;328 }329}330 331/*332 * We assume 8-bit thermal sensors; 9-bit thermal sensors are possible333 * too, but I have no idea how to figure out when they are used.334 */335static inline long temp_from_reg(s16 reg)336{337 return reg * 1000 / 256;338}339 340static inline long temp_from_reg8(s8 reg)341{342 return reg * 1000;343}344 345/*346 * Data interface347 */348 349static struct pc87427_data *pc87427_update_device(struct device *dev)350{351 struct pc87427_data *data = dev_get_drvdata(dev);352 int i;353 354 mutex_lock(&data->lock);355 if (!time_after(jiffies, data->last_updated + HZ)356 && data->last_updated)357 goto done;358 359 /* Fans */360 for (i = 0; i < 8; i++) {361 if (!(data->fan_enabled & (1 << i)))362 continue;363 pc87427_readall_fan(data, i);364 }365 366 /* PWM outputs */367 for (i = 0; i < 4; i++) {368 if (!(data->pwm_enabled & (1 << i)))369 continue;370 pc87427_readall_pwm(data, i);371 }372 373 /* Temperature channels */374 for (i = 0; i < 6; i++) {375 if (!(data->temp_enabled & (1 << i)))376 continue;377 pc87427_readall_temp(data, i);378 }379 380 data->last_updated = jiffies;381 382done:383 mutex_unlock(&data->lock);384 return data;385}386 387static ssize_t fan_input_show(struct device *dev,388 struct device_attribute *devattr, char *buf)389{390 struct pc87427_data *data = pc87427_update_device(dev);391 int nr = to_sensor_dev_attr(devattr)->index;392 393 return sprintf(buf, "%lu\n", fan_from_reg(data->fan[nr]));394}395 396static ssize_t fan_min_show(struct device *dev,397 struct device_attribute *devattr, char *buf)398{399 struct pc87427_data *data = pc87427_update_device(dev);400 int nr = to_sensor_dev_attr(devattr)->index;401 402 return sprintf(buf, "%lu\n", fan_from_reg(data->fan_min[nr]));403}404 405static ssize_t fan_alarm_show(struct device *dev,406 struct device_attribute *devattr, char *buf)407{408 struct pc87427_data *data = pc87427_update_device(dev);409 int nr = to_sensor_dev_attr(devattr)->index;410 411 return sprintf(buf, "%d\n", !!(data->fan_status[nr]412 & FAN_STATUS_LOSPD));413}414 415static ssize_t fan_fault_show(struct device *dev,416 struct device_attribute *devattr, char *buf)417{418 struct pc87427_data *data = pc87427_update_device(dev);419 int nr = to_sensor_dev_attr(devattr)->index;420 421 return sprintf(buf, "%d\n", !!(data->fan_status[nr]422 & FAN_STATUS_STALL));423}424 425static ssize_t fan_min_store(struct device *dev,426 struct device_attribute *devattr,427 const char *buf, size_t count)428{429 struct pc87427_data *data = dev_get_drvdata(dev);430 int nr = to_sensor_dev_attr(devattr)->index;431 unsigned long val;432 int iobase = data->address[LD_FAN];433 434 if (kstrtoul(buf, 10, &val) < 0)435 return -EINVAL;436 437 mutex_lock(&data->lock);438 outb(BANK_FM(nr), iobase + PC87427_REG_BANK);439 /*440 * The low speed limit registers are read-only while monitoring441 * is enabled, so we have to disable monitoring, then change the442 * limit, and finally enable monitoring again.443 */444 outb(0, iobase + PC87427_REG_FAN_STATUS);445 data->fan_min[nr] = fan_to_reg(val);446 outw(data->fan_min[nr], iobase + PC87427_REG_FAN_MIN);447 outb(FAN_STATUS_MONEN, iobase + PC87427_REG_FAN_STATUS);448 mutex_unlock(&data->lock);449 450 return count;451}452 453static SENSOR_DEVICE_ATTR_RO(fan1_input, fan_input, 0);454static SENSOR_DEVICE_ATTR_RO(fan2_input, fan_input, 1);455static SENSOR_DEVICE_ATTR_RO(fan3_input, fan_input, 2);456static SENSOR_DEVICE_ATTR_RO(fan4_input, fan_input, 3);457static SENSOR_DEVICE_ATTR_RO(fan5_input, fan_input, 4);458static SENSOR_DEVICE_ATTR_RO(fan6_input, fan_input, 5);459static SENSOR_DEVICE_ATTR_RO(fan7_input, fan_input, 6);460static SENSOR_DEVICE_ATTR_RO(fan8_input, fan_input, 7);461 462static SENSOR_DEVICE_ATTR_RW(fan1_min, fan_min, 0);463static SENSOR_DEVICE_ATTR_RW(fan2_min, fan_min, 1);464static SENSOR_DEVICE_ATTR_RW(fan3_min, fan_min, 2);465static SENSOR_DEVICE_ATTR_RW(fan4_min, fan_min, 3);466static SENSOR_DEVICE_ATTR_RW(fan5_min, fan_min, 4);467static SENSOR_DEVICE_ATTR_RW(fan6_min, fan_min, 5);468static SENSOR_DEVICE_ATTR_RW(fan7_min, fan_min, 6);469static SENSOR_DEVICE_ATTR_RW(fan8_min, fan_min, 7);470 471static SENSOR_DEVICE_ATTR_RO(fan1_alarm, fan_alarm, 0);472static SENSOR_DEVICE_ATTR_RO(fan2_alarm, fan_alarm, 1);473static SENSOR_DEVICE_ATTR_RO(fan3_alarm, fan_alarm, 2);474static SENSOR_DEVICE_ATTR_RO(fan4_alarm, fan_alarm, 3);475static SENSOR_DEVICE_ATTR_RO(fan5_alarm, fan_alarm, 4);476static SENSOR_DEVICE_ATTR_RO(fan6_alarm, fan_alarm, 5);477static SENSOR_DEVICE_ATTR_RO(fan7_alarm, fan_alarm, 6);478static SENSOR_DEVICE_ATTR_RO(fan8_alarm, fan_alarm, 7);479 480static SENSOR_DEVICE_ATTR_RO(fan1_fault, fan_fault, 0);481static SENSOR_DEVICE_ATTR_RO(fan2_fault, fan_fault, 1);482static SENSOR_DEVICE_ATTR_RO(fan3_fault, fan_fault, 2);483static SENSOR_DEVICE_ATTR_RO(fan4_fault, fan_fault, 3);484static SENSOR_DEVICE_ATTR_RO(fan5_fault, fan_fault, 4);485static SENSOR_DEVICE_ATTR_RO(fan6_fault, fan_fault, 5);486static SENSOR_DEVICE_ATTR_RO(fan7_fault, fan_fault, 6);487static SENSOR_DEVICE_ATTR_RO(fan8_fault, fan_fault, 7);488 489static struct attribute *pc87427_attributes_fan[8][5] = {490 {491 &sensor_dev_attr_fan1_input.dev_attr.attr,492 &sensor_dev_attr_fan1_min.dev_attr.attr,493 &sensor_dev_attr_fan1_alarm.dev_attr.attr,494 &sensor_dev_attr_fan1_fault.dev_attr.attr,495 NULL496 }, {497 &sensor_dev_attr_fan2_input.dev_attr.attr,498 &sensor_dev_attr_fan2_min.dev_attr.attr,499 &sensor_dev_attr_fan2_alarm.dev_attr.attr,500 &sensor_dev_attr_fan2_fault.dev_attr.attr,501 NULL502 }, {503 &sensor_dev_attr_fan3_input.dev_attr.attr,504 &sensor_dev_attr_fan3_min.dev_attr.attr,505 &sensor_dev_attr_fan3_alarm.dev_attr.attr,506 &sensor_dev_attr_fan3_fault.dev_attr.attr,507 NULL508 }, {509 &sensor_dev_attr_fan4_input.dev_attr.attr,510 &sensor_dev_attr_fan4_min.dev_attr.attr,511 &sensor_dev_attr_fan4_alarm.dev_attr.attr,512 &sensor_dev_attr_fan4_fault.dev_attr.attr,513 NULL514 }, {515 &sensor_dev_attr_fan5_input.dev_attr.attr,516 &sensor_dev_attr_fan5_min.dev_attr.attr,517 &sensor_dev_attr_fan5_alarm.dev_attr.attr,518 &sensor_dev_attr_fan5_fault.dev_attr.attr,519 NULL520 }, {521 &sensor_dev_attr_fan6_input.dev_attr.attr,522 &sensor_dev_attr_fan6_min.dev_attr.attr,523 &sensor_dev_attr_fan6_alarm.dev_attr.attr,524 &sensor_dev_attr_fan6_fault.dev_attr.attr,525 NULL526 }, {527 &sensor_dev_attr_fan7_input.dev_attr.attr,528 &sensor_dev_attr_fan7_min.dev_attr.attr,529 &sensor_dev_attr_fan7_alarm.dev_attr.attr,530 &sensor_dev_attr_fan7_fault.dev_attr.attr,531 NULL532 }, {533 &sensor_dev_attr_fan8_input.dev_attr.attr,534 &sensor_dev_attr_fan8_min.dev_attr.attr,535 &sensor_dev_attr_fan8_alarm.dev_attr.attr,536 &sensor_dev_attr_fan8_fault.dev_attr.attr,537 NULL538 }539};540 541static const struct attribute_group pc87427_group_fan[8] = {542 { .attrs = pc87427_attributes_fan[0] },543 { .attrs = pc87427_attributes_fan[1] },544 { .attrs = pc87427_attributes_fan[2] },545 { .attrs = pc87427_attributes_fan[3] },546 { .attrs = pc87427_attributes_fan[4] },547 { .attrs = pc87427_attributes_fan[5] },548 { .attrs = pc87427_attributes_fan[6] },549 { .attrs = pc87427_attributes_fan[7] },550};551 552/*553 * Must be called with data->lock held and pc87427_readall_pwm() freshly554 * called555 */556static void update_pwm_enable(struct pc87427_data *data, int nr, u8 mode)557{558 int iobase = data->address[LD_FAN];559 data->pwm_enable[nr] &= ~PWM_ENABLE_MODE_MASK;560 data->pwm_enable[nr] |= mode;561 outb(data->pwm_enable[nr], iobase + PC87427_REG_PWM_ENABLE);562}563 564static ssize_t pwm_enable_show(struct device *dev,565 struct device_attribute *devattr, char *buf)566{567 struct pc87427_data *data = pc87427_update_device(dev);568 int nr = to_sensor_dev_attr(devattr)->index;569 int pwm_enable;570 571 pwm_enable = pwm_enable_from_reg(data->pwm_enable[nr]);572 if (pwm_enable < 0)573 return pwm_enable;574 return sprintf(buf, "%d\n", pwm_enable);575}576 577static ssize_t pwm_enable_store(struct device *dev,578 struct device_attribute *devattr,579 const char *buf, size_t count)580{581 struct pc87427_data *data = dev_get_drvdata(dev);582 int nr = to_sensor_dev_attr(devattr)->index;583 unsigned long val;584 585 if (kstrtoul(buf, 10, &val) < 0 || val > 2)586 return -EINVAL;587 /* Can't go to automatic mode if it isn't configured */588 if (val == 2 && !(data->pwm_auto_ok & (1 << nr)))589 return -EINVAL;590 591 mutex_lock(&data->lock);592 pc87427_readall_pwm(data, nr);593 update_pwm_enable(data, nr, pwm_enable_to_reg(val, data->pwm[nr]));594 mutex_unlock(&data->lock);595 596 return count;597}598 599static ssize_t pwm_show(struct device *dev, struct device_attribute *devattr,600 char *buf)601{602 struct pc87427_data *data = pc87427_update_device(dev);603 int nr = to_sensor_dev_attr(devattr)->index;604 605 return sprintf(buf, "%d\n", (int)data->pwm[nr]);606}607 608static ssize_t pwm_store(struct device *dev, struct device_attribute *devattr,609 const char *buf, size_t count)610{611 struct pc87427_data *data = dev_get_drvdata(dev);612 int nr = to_sensor_dev_attr(devattr)->index;613 unsigned long val;614 int iobase = data->address[LD_FAN];615 u8 mode;616 617 if (kstrtoul(buf, 10, &val) < 0 || val > 0xff)618 return -EINVAL;619 620 mutex_lock(&data->lock);621 pc87427_readall_pwm(data, nr);622 mode = data->pwm_enable[nr] & PWM_ENABLE_MODE_MASK;623 if (mode != PWM_MODE_MANUAL && mode != PWM_MODE_OFF) {624 dev_notice(dev,625 "Can't set PWM%d duty cycle while not in manual mode\n",626 nr + 1);627 mutex_unlock(&data->lock);628 return -EPERM;629 }630 631 /* We may have to change the mode */632 if (mode == PWM_MODE_MANUAL && val == 0) {633 /* Transition from Manual to Off */634 update_pwm_enable(data, nr, PWM_MODE_OFF);635 mode = PWM_MODE_OFF;636 dev_dbg(dev, "Switching PWM%d from %s to %s\n", nr + 1,637 "manual", "off");638 } else if (mode == PWM_MODE_OFF && val != 0) {639 /* Transition from Off to Manual */640 update_pwm_enable(data, nr, PWM_MODE_MANUAL);641 mode = PWM_MODE_MANUAL;642 dev_dbg(dev, "Switching PWM%d from %s to %s\n", nr + 1,643 "off", "manual");644 }645 646 data->pwm[nr] = val;647 if (mode == PWM_MODE_MANUAL)648 outb(val, iobase + PC87427_REG_PWM_DUTY);649 mutex_unlock(&data->lock);650 651 return count;652}653 654static SENSOR_DEVICE_ATTR_RW(pwm1_enable, pwm_enable, 0);655static SENSOR_DEVICE_ATTR_RW(pwm2_enable, pwm_enable, 1);656static SENSOR_DEVICE_ATTR_RW(pwm3_enable, pwm_enable, 2);657static SENSOR_DEVICE_ATTR_RW(pwm4_enable, pwm_enable, 3);658 659static SENSOR_DEVICE_ATTR_RW(pwm1, pwm, 0);660static SENSOR_DEVICE_ATTR_RW(pwm2, pwm, 1);661static SENSOR_DEVICE_ATTR_RW(pwm3, pwm, 2);662static SENSOR_DEVICE_ATTR_RW(pwm4, pwm, 3);663 664static struct attribute *pc87427_attributes_pwm[4][3] = {665 {666 &sensor_dev_attr_pwm1_enable.dev_attr.attr,667 &sensor_dev_attr_pwm1.dev_attr.attr,668 NULL669 }, {670 &sensor_dev_attr_pwm2_enable.dev_attr.attr,671 &sensor_dev_attr_pwm2.dev_attr.attr,672 NULL673 }, {674 &sensor_dev_attr_pwm3_enable.dev_attr.attr,675 &sensor_dev_attr_pwm3.dev_attr.attr,676 NULL677 }, {678 &sensor_dev_attr_pwm4_enable.dev_attr.attr,679 &sensor_dev_attr_pwm4.dev_attr.attr,680 NULL681 }682};683 684static const struct attribute_group pc87427_group_pwm[4] = {685 { .attrs = pc87427_attributes_pwm[0] },686 { .attrs = pc87427_attributes_pwm[1] },687 { .attrs = pc87427_attributes_pwm[2] },688 { .attrs = pc87427_attributes_pwm[3] },689};690 691static ssize_t temp_input_show(struct device *dev,692 struct device_attribute *devattr, char *buf)693{694 struct pc87427_data *data = pc87427_update_device(dev);695 int nr = to_sensor_dev_attr(devattr)->index;696 697 return sprintf(buf, "%ld\n", temp_from_reg(data->temp[nr]));698}699 700static ssize_t temp_min_show(struct device *dev,701 struct device_attribute *devattr, char *buf)702{703 struct pc87427_data *data = pc87427_update_device(dev);704 int nr = to_sensor_dev_attr(devattr)->index;705 706 return sprintf(buf, "%ld\n", temp_from_reg8(data->temp_min[nr]));707}708 709static ssize_t temp_max_show(struct device *dev,710 struct device_attribute *devattr, char *buf)711{712 struct pc87427_data *data = pc87427_update_device(dev);713 int nr = to_sensor_dev_attr(devattr)->index;714 715 return sprintf(buf, "%ld\n", temp_from_reg8(data->temp_max[nr]));716}717 718static ssize_t temp_crit_show(struct device *dev,719 struct device_attribute *devattr, char *buf)720{721 struct pc87427_data *data = pc87427_update_device(dev);722 int nr = to_sensor_dev_attr(devattr)->index;723 724 return sprintf(buf, "%ld\n", temp_from_reg8(data->temp_crit[nr]));725}726 727static ssize_t temp_type_show(struct device *dev,728 struct device_attribute *devattr, char *buf)729{730 struct pc87427_data *data = pc87427_update_device(dev);731 int nr = to_sensor_dev_attr(devattr)->index;732 733 return sprintf(buf, "%u\n", temp_type_from_reg(data->temp_type[nr]));734}735 736static ssize_t temp_min_alarm_show(struct device *dev,737 struct device_attribute *devattr,738 char *buf)739{740 struct pc87427_data *data = pc87427_update_device(dev);741 int nr = to_sensor_dev_attr(devattr)->index;742 743 return sprintf(buf, "%d\n", !!(data->temp_status[nr]744 & TEMP_STATUS_LOWFLG));745}746 747static ssize_t temp_max_alarm_show(struct device *dev,748 struct device_attribute *devattr,749 char *buf)750{751 struct pc87427_data *data = pc87427_update_device(dev);752 int nr = to_sensor_dev_attr(devattr)->index;753 754 return sprintf(buf, "%d\n", !!(data->temp_status[nr]755 & TEMP_STATUS_HIGHFLG));756}757 758static ssize_t temp_crit_alarm_show(struct device *dev,759 struct device_attribute *devattr,760 char *buf)761{762 struct pc87427_data *data = pc87427_update_device(dev);763 int nr = to_sensor_dev_attr(devattr)->index;764 765 return sprintf(buf, "%d\n", !!(data->temp_status[nr]766 & TEMP_STATUS_CRITFLG));767}768 769static ssize_t temp_fault_show(struct device *dev,770 struct device_attribute *devattr, char *buf)771{772 struct pc87427_data *data = pc87427_update_device(dev);773 int nr = to_sensor_dev_attr(devattr)->index;774 775 return sprintf(buf, "%d\n", !!(data->temp_status[nr]776 & TEMP_STATUS_SENSERR));777}778 779static SENSOR_DEVICE_ATTR_RO(temp1_input, temp_input, 0);780static SENSOR_DEVICE_ATTR_RO(temp2_input, temp_input, 1);781static SENSOR_DEVICE_ATTR_RO(temp3_input, temp_input, 2);782static SENSOR_DEVICE_ATTR_RO(temp4_input, temp_input, 3);783static SENSOR_DEVICE_ATTR_RO(temp5_input, temp_input, 4);784static SENSOR_DEVICE_ATTR_RO(temp6_input, temp_input, 5);785 786static SENSOR_DEVICE_ATTR_RO(temp1_min, temp_min, 0);787static SENSOR_DEVICE_ATTR_RO(temp2_min, temp_min, 1);788static SENSOR_DEVICE_ATTR_RO(temp3_min, temp_min, 2);789static SENSOR_DEVICE_ATTR_RO(temp4_min, temp_min, 3);790static SENSOR_DEVICE_ATTR_RO(temp5_min, temp_min, 4);791static SENSOR_DEVICE_ATTR_RO(temp6_min, temp_min, 5);792 793static SENSOR_DEVICE_ATTR_RO(temp1_max, temp_max, 0);794static SENSOR_DEVICE_ATTR_RO(temp2_max, temp_max, 1);795static SENSOR_DEVICE_ATTR_RO(temp3_max, temp_max, 2);796static SENSOR_DEVICE_ATTR_RO(temp4_max, temp_max, 3);797static SENSOR_DEVICE_ATTR_RO(temp5_max, temp_max, 4);798static SENSOR_DEVICE_ATTR_RO(temp6_max, temp_max, 5);799 800static SENSOR_DEVICE_ATTR_RO(temp1_crit, temp_crit, 0);801static SENSOR_DEVICE_ATTR_RO(temp2_crit, temp_crit, 1);802static SENSOR_DEVICE_ATTR_RO(temp3_crit, temp_crit, 2);803static SENSOR_DEVICE_ATTR_RO(temp4_crit, temp_crit, 3);804static SENSOR_DEVICE_ATTR_RO(temp5_crit, temp_crit, 4);805static SENSOR_DEVICE_ATTR_RO(temp6_crit, temp_crit, 5);806 807static SENSOR_DEVICE_ATTR_RO(temp1_type, temp_type, 0);808static SENSOR_DEVICE_ATTR_RO(temp2_type, temp_type, 1);809static SENSOR_DEVICE_ATTR_RO(temp3_type, temp_type, 2);810static SENSOR_DEVICE_ATTR_RO(temp4_type, temp_type, 3);811static SENSOR_DEVICE_ATTR_RO(temp5_type, temp_type, 4);812static SENSOR_DEVICE_ATTR_RO(temp6_type, temp_type, 5);813 814static SENSOR_DEVICE_ATTR_RO(temp1_min_alarm, temp_min_alarm, 0);815static SENSOR_DEVICE_ATTR_RO(temp2_min_alarm, temp_min_alarm, 1);816static SENSOR_DEVICE_ATTR_RO(temp3_min_alarm, temp_min_alarm, 2);817static SENSOR_DEVICE_ATTR_RO(temp4_min_alarm, temp_min_alarm, 3);818static SENSOR_DEVICE_ATTR_RO(temp5_min_alarm, temp_min_alarm, 4);819static SENSOR_DEVICE_ATTR_RO(temp6_min_alarm, temp_min_alarm, 5);820 821static SENSOR_DEVICE_ATTR_RO(temp1_max_alarm, temp_max_alarm, 0);822static SENSOR_DEVICE_ATTR_RO(temp2_max_alarm, temp_max_alarm, 1);823static SENSOR_DEVICE_ATTR_RO(temp3_max_alarm, temp_max_alarm, 2);824static SENSOR_DEVICE_ATTR_RO(temp4_max_alarm, temp_max_alarm, 3);825static SENSOR_DEVICE_ATTR_RO(temp5_max_alarm, temp_max_alarm, 4);826static SENSOR_DEVICE_ATTR_RO(temp6_max_alarm, temp_max_alarm, 5);827 828static SENSOR_DEVICE_ATTR_RO(temp1_crit_alarm, temp_crit_alarm, 0);829static SENSOR_DEVICE_ATTR_RO(temp2_crit_alarm, temp_crit_alarm, 1);830static SENSOR_DEVICE_ATTR_RO(temp3_crit_alarm, temp_crit_alarm, 2);831static SENSOR_DEVICE_ATTR_RO(temp4_crit_alarm, temp_crit_alarm, 3);832static SENSOR_DEVICE_ATTR_RO(temp5_crit_alarm, temp_crit_alarm, 4);833static SENSOR_DEVICE_ATTR_RO(temp6_crit_alarm, temp_crit_alarm, 5);834 835static SENSOR_DEVICE_ATTR_RO(temp1_fault, temp_fault, 0);836static SENSOR_DEVICE_ATTR_RO(temp2_fault, temp_fault, 1);837static SENSOR_DEVICE_ATTR_RO(temp3_fault, temp_fault, 2);838static SENSOR_DEVICE_ATTR_RO(temp4_fault, temp_fault, 3);839static SENSOR_DEVICE_ATTR_RO(temp5_fault, temp_fault, 4);840static SENSOR_DEVICE_ATTR_RO(temp6_fault, temp_fault, 5);841 842static struct attribute *pc87427_attributes_temp[6][10] = {843 {844 &sensor_dev_attr_temp1_input.dev_attr.attr,845 &sensor_dev_attr_temp1_min.dev_attr.attr,846 &sensor_dev_attr_temp1_max.dev_attr.attr,847 &sensor_dev_attr_temp1_crit.dev_attr.attr,848 &sensor_dev_attr_temp1_type.dev_attr.attr,849 &sensor_dev_attr_temp1_min_alarm.dev_attr.attr,850 &sensor_dev_attr_temp1_max_alarm.dev_attr.attr,851 &sensor_dev_attr_temp1_crit_alarm.dev_attr.attr,852 &sensor_dev_attr_temp1_fault.dev_attr.attr,853 NULL854 }, {855 &sensor_dev_attr_temp2_input.dev_attr.attr,856 &sensor_dev_attr_temp2_min.dev_attr.attr,857 &sensor_dev_attr_temp2_max.dev_attr.attr,858 &sensor_dev_attr_temp2_crit.dev_attr.attr,859 &sensor_dev_attr_temp2_type.dev_attr.attr,860 &sensor_dev_attr_temp2_min_alarm.dev_attr.attr,861 &sensor_dev_attr_temp2_max_alarm.dev_attr.attr,862 &sensor_dev_attr_temp2_crit_alarm.dev_attr.attr,863 &sensor_dev_attr_temp2_fault.dev_attr.attr,864 NULL865 }, {866 &sensor_dev_attr_temp3_input.dev_attr.attr,867 &sensor_dev_attr_temp3_min.dev_attr.attr,868 &sensor_dev_attr_temp3_max.dev_attr.attr,869 &sensor_dev_attr_temp3_crit.dev_attr.attr,870 &sensor_dev_attr_temp3_type.dev_attr.attr,871 &sensor_dev_attr_temp3_min_alarm.dev_attr.attr,872 &sensor_dev_attr_temp3_max_alarm.dev_attr.attr,873 &sensor_dev_attr_temp3_crit_alarm.dev_attr.attr,874 &sensor_dev_attr_temp3_fault.dev_attr.attr,875 NULL876 }, {877 &sensor_dev_attr_temp4_input.dev_attr.attr,878 &sensor_dev_attr_temp4_min.dev_attr.attr,879 &sensor_dev_attr_temp4_max.dev_attr.attr,880 &sensor_dev_attr_temp4_crit.dev_attr.attr,881 &sensor_dev_attr_temp4_type.dev_attr.attr,882 &sensor_dev_attr_temp4_min_alarm.dev_attr.attr,883 &sensor_dev_attr_temp4_max_alarm.dev_attr.attr,884 &sensor_dev_attr_temp4_crit_alarm.dev_attr.attr,885 &sensor_dev_attr_temp4_fault.dev_attr.attr,886 NULL887 }, {888 &sensor_dev_attr_temp5_input.dev_attr.attr,889 &sensor_dev_attr_temp5_min.dev_attr.attr,890 &sensor_dev_attr_temp5_max.dev_attr.attr,891 &sensor_dev_attr_temp5_crit.dev_attr.attr,892 &sensor_dev_attr_temp5_type.dev_attr.attr,893 &sensor_dev_attr_temp5_min_alarm.dev_attr.attr,894 &sensor_dev_attr_temp5_max_alarm.dev_attr.attr,895 &sensor_dev_attr_temp5_crit_alarm.dev_attr.attr,896 &sensor_dev_attr_temp5_fault.dev_attr.attr,897 NULL898 }, {899 &sensor_dev_attr_temp6_input.dev_attr.attr,900 &sensor_dev_attr_temp6_min.dev_attr.attr,901 &sensor_dev_attr_temp6_max.dev_attr.attr,902 &sensor_dev_attr_temp6_crit.dev_attr.attr,903 &sensor_dev_attr_temp6_type.dev_attr.attr,904 &sensor_dev_attr_temp6_min_alarm.dev_attr.attr,905 &sensor_dev_attr_temp6_max_alarm.dev_attr.attr,906 &sensor_dev_attr_temp6_crit_alarm.dev_attr.attr,907 &sensor_dev_attr_temp6_fault.dev_attr.attr,908 NULL909 }910};911 912static const struct attribute_group pc87427_group_temp[6] = {913 { .attrs = pc87427_attributes_temp[0] },914 { .attrs = pc87427_attributes_temp[1] },915 { .attrs = pc87427_attributes_temp[2] },916 { .attrs = pc87427_attributes_temp[3] },917 { .attrs = pc87427_attributes_temp[4] },918 { .attrs = pc87427_attributes_temp[5] },919};920 921static ssize_t name_show(struct device *dev, struct device_attribute922 *devattr, char *buf)923{924 struct pc87427_data *data = dev_get_drvdata(dev);925 926 return sprintf(buf, "%s\n", data->name);927}928static DEVICE_ATTR_RO(name);929 930 931/*932 * Device detection, attach and detach933 */934 935static int pc87427_request_regions(struct platform_device *pdev,936 int count)937{938 struct resource *res;939 int i;940 941 for (i = 0; i < count; i++) {942 res = platform_get_resource(pdev, IORESOURCE_IO, i);943 if (!res) {944 dev_err(&pdev->dev, "Missing resource #%d\n", i);945 return -ENOENT;946 }947 if (!devm_request_region(&pdev->dev, res->start,948 resource_size(res), DRVNAME)) {949 dev_err(&pdev->dev,950 "Failed to request region 0x%lx-0x%lx\n",951 (unsigned long)res->start,952 (unsigned long)res->end);953 return -EBUSY;954 }955 }956 return 0;957}958 959static void pc87427_init_device(struct device *dev)960{961 struct pc87427_sio_data *sio_data = dev_get_platdata(dev);962 struct pc87427_data *data = dev_get_drvdata(dev);963 int i;964 u8 reg;965 966 /* The FMC module should be ready */967 reg = pc87427_read8(data, LD_FAN, PC87427_REG_BANK);968 if (!(reg & 0x80))969 dev_warn(dev, "%s module not ready!\n", "FMC");970 971 /* Check which fans are enabled */972 for (i = 0; i < 8; i++) {973 if (!(sio_data->has_fanin & (1 << i))) /* Not wired */974 continue;975 reg = pc87427_read8_bank(data, LD_FAN, BANK_FM(i),976 PC87427_REG_FAN_STATUS);977 if (reg & FAN_STATUS_MONEN)978 data->fan_enabled |= (1 << i);979 }980 981 if (!data->fan_enabled) {982 dev_dbg(dev, "Enabling monitoring of all fans\n");983 for (i = 0; i < 8; i++) {984 if (!(sio_data->has_fanin & (1 << i))) /* Not wired */985 continue;986 pc87427_write8_bank(data, LD_FAN, BANK_FM(i),987 PC87427_REG_FAN_STATUS,988 FAN_STATUS_MONEN);989 }990 data->fan_enabled = sio_data->has_fanin;991 }992 993 /* Check which PWM outputs are enabled */994 for (i = 0; i < 4; i++) {995 if (!(sio_data->has_fanout & (1 << i))) /* Not wired */996 continue;997 reg = pc87427_read8_bank(data, LD_FAN, BANK_FC(i),998 PC87427_REG_PWM_ENABLE);999 if (reg & PWM_ENABLE_CTLEN)1000 data->pwm_enabled |= (1 << i);1001 1002 /*1003 * We don't expose an interface to reconfigure the automatic1004 * fan control mode, so only allow to return to this mode if1005 * it was originally set.1006 */1007 if ((reg & PWM_ENABLE_MODE_MASK) == PWM_MODE_AUTO) {1008 dev_dbg(dev, "PWM%d is in automatic control mode\n",1009 i + 1);1010 data->pwm_auto_ok |= (1 << i);1011 }1012 }1013 1014 /* The HMC module should be ready */1015 reg = pc87427_read8(data, LD_TEMP, PC87427_REG_BANK);1016 if (!(reg & 0x80))1017 dev_warn(dev, "%s module not ready!\n", "HMC");1018 1019 /* Check which temperature channels are enabled */1020 for (i = 0; i < 6; i++) {1021 reg = pc87427_read8_bank(data, LD_TEMP, BANK_TM(i),1022 PC87427_REG_TEMP_STATUS);1023 if (reg & TEMP_STATUS_CHANEN)1024 data->temp_enabled |= (1 << i);1025 }1026}1027 1028static void pc87427_remove_files(struct device *dev)1029{1030 struct pc87427_data *data = dev_get_drvdata(dev);1031 int i;1032 1033 device_remove_file(dev, &dev_attr_name);1034 for (i = 0; i < 8; i++) {1035 if (!(data->fan_enabled & (1 << i)))1036 continue;1037 sysfs_remove_group(&dev->kobj, &pc87427_group_fan[i]);1038 }1039 for (i = 0; i < 4; i++) {1040 if (!(data->pwm_enabled & (1 << i)))1041 continue;1042 sysfs_remove_group(&dev->kobj, &pc87427_group_pwm[i]);1043 }1044 for (i = 0; i < 6; i++) {1045 if (!(data->temp_enabled & (1 << i)))1046 continue;1047 sysfs_remove_group(&dev->kobj, &pc87427_group_temp[i]);1048 }1049}1050 1051static int pc87427_probe(struct platform_device *pdev)1052{1053 struct pc87427_sio_data *sio_data = dev_get_platdata(&pdev->dev);1054 struct pc87427_data *data;1055 int i, err, res_count;1056 1057 data = devm_kzalloc(&pdev->dev, sizeof(struct pc87427_data),1058 GFP_KERNEL);1059 if (!data)1060 return -ENOMEM;1061 1062 data->address[0] = sio_data->address[0];1063 data->address[1] = sio_data->address[1];1064 res_count = (data->address[0] != 0) + (data->address[1] != 0);1065 1066 err = pc87427_request_regions(pdev, res_count);1067 if (err)1068 return err;1069 1070 mutex_init(&data->lock);1071 data->name = "pc87427";1072 platform_set_drvdata(pdev, data);1073 pc87427_init_device(&pdev->dev);1074 1075 /* Register sysfs hooks */1076 err = device_create_file(&pdev->dev, &dev_attr_name);1077 if (err)1078 return err;1079 for (i = 0; i < 8; i++) {1080 if (!(data->fan_enabled & (1 << i)))1081 continue;1082 err = sysfs_create_group(&pdev->dev.kobj,1083 &pc87427_group_fan[i]);1084 if (err)1085 goto exit_remove_files;1086 }1087 for (i = 0; i < 4; i++) {1088 if (!(data->pwm_enabled & (1 << i)))1089 continue;1090 err = sysfs_create_group(&pdev->dev.kobj,1091 &pc87427_group_pwm[i]);1092 if (err)1093 goto exit_remove_files;1094 }1095 for (i = 0; i < 6; i++) {1096 if (!(data->temp_enabled & (1 << i)))1097 continue;1098 err = sysfs_create_group(&pdev->dev.kobj,1099 &pc87427_group_temp[i]);1100 if (err)1101 goto exit_remove_files;1102 }1103 1104 data->hwmon_dev = hwmon_device_register(&pdev->dev);1105 if (IS_ERR(data->hwmon_dev)) {1106 err = PTR_ERR(data->hwmon_dev);1107 dev_err(&pdev->dev, "Class registration failed (%d)\n", err);1108 goto exit_remove_files;1109 }1110 1111 return 0;1112 1113exit_remove_files:1114 pc87427_remove_files(&pdev->dev);1115 return err;1116}1117 1118static void pc87427_remove(struct platform_device *pdev)1119{1120 struct pc87427_data *data = platform_get_drvdata(pdev);1121 1122 hwmon_device_unregister(data->hwmon_dev);1123 pc87427_remove_files(&pdev->dev);1124}1125 1126 1127static struct platform_driver pc87427_driver = {1128 .driver = {1129 .name = DRVNAME,1130 },1131 .probe = pc87427_probe,1132 .remove_new = pc87427_remove,1133};1134 1135static int __init pc87427_device_add(const struct pc87427_sio_data *sio_data)1136{1137 struct resource res[2] = {1138 { .flags = IORESOURCE_IO },1139 { .flags = IORESOURCE_IO },1140 };1141 int err, i, res_count;1142 1143 res_count = 0;1144 for (i = 0; i < 2; i++) {1145 if (!sio_data->address[i])1146 continue;1147 res[res_count].start = sio_data->address[i];1148 res[res_count].end = sio_data->address[i] + REGION_LENGTH - 1;1149 res[res_count].name = logdev_str[i];1150 1151 err = acpi_check_resource_conflict(&res[res_count]);1152 if (err)1153 goto exit;1154 1155 res_count++;1156 }1157 1158 pdev = platform_device_alloc(DRVNAME, res[0].start);1159 if (!pdev) {1160 err = -ENOMEM;1161 pr_err("Device allocation failed\n");1162 goto exit;1163 }1164 1165 err = platform_device_add_resources(pdev, res, res_count);1166 if (err) {1167 pr_err("Device resource addition failed (%d)\n", err);1168 goto exit_device_put;1169 }1170 1171 err = platform_device_add_data(pdev, sio_data,1172 sizeof(struct pc87427_sio_data));1173 if (err) {1174 pr_err("Platform data allocation failed\n");1175 goto exit_device_put;1176 }1177 1178 err = platform_device_add(pdev);1179 if (err) {1180 pr_err("Device addition failed (%d)\n", err);1181 goto exit_device_put;1182 }1183 1184 return 0;1185 1186exit_device_put:1187 platform_device_put(pdev);1188exit:1189 return err;1190}1191 1192static int __init pc87427_find(int sioaddr, struct pc87427_sio_data *sio_data)1193{1194 u16 val;1195 u8 cfg, cfg_b;1196 int i, err;1197 1198 err = superio_enter(sioaddr);1199 if (err)1200 return err;1201 1202 /* Identify device */1203 val = force_id ? force_id : superio_inb(sioaddr, SIOREG_DEVID);1204 if (val != 0xf2) { /* PC87427 */1205 err = -ENODEV;1206 goto exit;1207 }1208 1209 for (i = 0; i < 2; i++) {1210 sio_data->address[i] = 0;1211 /* Select logical device */1212 superio_outb(sioaddr, SIOREG_LDSEL, logdev[i]);1213 1214 val = superio_inb(sioaddr, SIOREG_ACT);1215 if (!(val & 0x01)) {1216 pr_info("Logical device 0x%02x not activated\n",1217 logdev[i]);1218 continue;1219 }1220 1221 val = superio_inb(sioaddr, SIOREG_MAP);1222 if (val & 0x01) {1223 pr_warn("Logical device 0x%02x is memory-mapped, can't use\n",1224 logdev[i]);1225 continue;1226 }1227 1228 val = (superio_inb(sioaddr, SIOREG_IOBASE) << 8)1229 | superio_inb(sioaddr, SIOREG_IOBASE + 1);1230 if (!val) {1231 pr_info("I/O base address not set for logical device 0x%02x\n",1232 logdev[i]);1233 continue;1234 }1235 sio_data->address[i] = val;1236 }1237 1238 /* No point in loading the driver if everything is disabled */1239 if (!sio_data->address[0] && !sio_data->address[1]) {1240 err = -ENODEV;1241 goto exit;1242 }1243 1244 /* Check which fan inputs are wired */1245 sio_data->has_fanin = (1 << 2) | (1 << 3); /* FANIN2, FANIN3 */1246 1247 cfg = superio_inb(sioaddr, SIOREG_CF2);1248 if (!(cfg & (1 << 3)))1249 sio_data->has_fanin |= (1 << 0); /* FANIN0 */1250 if (!(cfg & (1 << 2)))1251 sio_data->has_fanin |= (1 << 4); /* FANIN4 */1252 1253 cfg = superio_inb(sioaddr, SIOREG_CFD);1254 if (!(cfg & (1 << 0)))1255 sio_data->has_fanin |= (1 << 1); /* FANIN1 */1256 1257 cfg = superio_inb(sioaddr, SIOREG_CF4);1258 if (!(cfg & (1 << 0)))1259 sio_data->has_fanin |= (1 << 7); /* FANIN7 */1260 cfg_b = superio_inb(sioaddr, SIOREG_CFB);1261 if (!(cfg & (1 << 1)) && (cfg_b & (1 << 3)))1262 sio_data->has_fanin |= (1 << 5); /* FANIN5 */1263 cfg = superio_inb(sioaddr, SIOREG_CF3);1264 if ((cfg & (1 << 3)) && !(cfg_b & (1 << 5)))1265 sio_data->has_fanin |= (1 << 6); /* FANIN6 */1266 1267 /* Check which fan outputs are wired */1268 sio_data->has_fanout = (1 << 0); /* FANOUT0 */1269 if (cfg_b & (1 << 0))1270 sio_data->has_fanout |= (1 << 3); /* FANOUT3 */1271 1272 cfg = superio_inb(sioaddr, SIOREG_CFC);1273 if (!(cfg & (1 << 4))) {1274 if (cfg_b & (1 << 1))1275 sio_data->has_fanout |= (1 << 1); /* FANOUT1 */1276 if (cfg_b & (1 << 2))1277 sio_data->has_fanout |= (1 << 2); /* FANOUT2 */1278 }1279 1280 /* FANOUT1 and FANOUT2 can each be routed to 2 different pins */1281 cfg = superio_inb(sioaddr, SIOREG_CF5);1282 if (cfg & (1 << 6))1283 sio_data->has_fanout |= (1 << 1); /* FANOUT1 */1284 if (cfg & (1 << 5))1285 sio_data->has_fanout |= (1 << 2); /* FANOUT2 */1286 1287exit:1288 superio_exit(sioaddr);1289 return err;1290}1291 1292static int __init pc87427_init(void)1293{1294 int err;1295 struct pc87427_sio_data sio_data;1296 1297 if (pc87427_find(0x2e, &sio_data)1298 && pc87427_find(0x4e, &sio_data))1299 return -ENODEV;1300 1301 err = platform_driver_register(&pc87427_driver);1302 if (err)1303 goto exit;1304 1305 /* Sets global pdev as a side effect */1306 err = pc87427_device_add(&sio_data);1307 if (err)1308 goto exit_driver;1309 1310 return 0;1311 1312exit_driver:1313 platform_driver_unregister(&pc87427_driver);1314exit:1315 return err;1316}1317 1318static void __exit pc87427_exit(void)1319{1320 platform_device_unregister(pdev);1321 platform_driver_unregister(&pc87427_driver);1322}1323 1324MODULE_AUTHOR("Jean Delvare <jdelvare@suse.de>");1325MODULE_DESCRIPTION("PC87427 hardware monitoring driver");1326MODULE_LICENSE("GPL");1327 1328module_init(pc87427_init);1329module_exit(pc87427_exit);1330