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1// SPDX-License-Identifier: GPL-2.0-or-later2/*3 * sis5595.c - Part of lm_sensors, Linux kernel modules4 * for hardware monitoring5 *6 * Copyright (C) 1998 - 2001 Frodo Looijaard <frodol@dds.nl>,7 * Kyösti Mälkki <kmalkki@cc.hut.fi>, and8 * Mark D. Studebaker <mdsxyz123@yahoo.com>9 * Ported to Linux 2.6 by Aurelien Jarno <aurelien@aurel32.net> with10 * the help of Jean Delvare <jdelvare@suse.de>11 */12 13/*14 * SiS southbridge has a LM78-like chip integrated on the same IC.15 * This driver is a customized copy of lm78.c16 *17 * Supports following revisions:18 * Version PCI ID PCI Revision19 * 1 1039/0008 AF or less20 * 2 1039/0008 B0 or greater21 *22 * Note: these chips contain a 0008 device which is incompatible with the23 * 5595. We recognize these by the presence of the listed24 * "blacklist" PCI ID and refuse to load.25 *26 * NOT SUPPORTED PCI ID BLACKLIST PCI ID27 * 540 0008 054028 * 550 0008 055029 * 5513 0008 551130 * 5581 0008 559731 * 5582 0008 559732 * 5597 0008 559733 * 5598 0008 5597/559834 * 630 0008 063035 * 645 0008 064536 * 730 0008 073037 * 735 0008 073538 */39 40#define DRIVER_NAME "sis5595"41#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt42 43#include <linux/module.h>44#include <linux/slab.h>45#include <linux/ioport.h>46#include <linux/pci.h>47#include <linux/platform_device.h>48#include <linux/hwmon.h>49#include <linux/hwmon-sysfs.h>50#include <linux/err.h>51#include <linux/init.h>52#include <linux/jiffies.h>53#include <linux/mutex.h>54#include <linux/sysfs.h>55#include <linux/acpi.h>56#include <linux/io.h>57 58/*59 * If force_addr is set to anything different from 0, we forcibly enable60 * the device at the given address.61 */62static u16 force_addr;63module_param(force_addr, ushort, 0);64MODULE_PARM_DESC(force_addr,65 "Initialize the base address of the sensors");66 67static struct platform_device *pdev;68 69/* Many SIS5595 constants specified below */70 71/* Length of ISA address segment */72#define SIS5595_EXTENT 873/* PCI Config Registers */74#define SIS5595_BASE_REG 0x6875#define SIS5595_PIN_REG 0x7A76#define SIS5595_ENABLE_REG 0x7B77 78/* Where are the ISA address/data registers relative to the base address */79#define SIS5595_ADDR_REG_OFFSET 580#define SIS5595_DATA_REG_OFFSET 681 82/* The SIS5595 registers */83#define SIS5595_REG_IN_MAX(nr) (0x2b + (nr) * 2)84#define SIS5595_REG_IN_MIN(nr) (0x2c + (nr) * 2)85#define SIS5595_REG_IN(nr) (0x20 + (nr))86 87#define SIS5595_REG_FAN_MIN(nr) (0x3b + (nr))88#define SIS5595_REG_FAN(nr) (0x28 + (nr))89 90/*91 * On the first version of the chip, the temp registers are separate.92 * On the second version,93 * TEMP pin is shared with IN4, configured in PCI register 0x7A.94 * The registers are the same as well.95 * OVER and HYST are really MAX and MIN.96 */97 98#define REV2MIN 0xb099#define SIS5595_REG_TEMP (((data->revision) >= REV2MIN) ? \100 SIS5595_REG_IN(4) : 0x27)101#define SIS5595_REG_TEMP_OVER (((data->revision) >= REV2MIN) ? \102 SIS5595_REG_IN_MAX(4) : 0x39)103#define SIS5595_REG_TEMP_HYST (((data->revision) >= REV2MIN) ? \104 SIS5595_REG_IN_MIN(4) : 0x3a)105 106#define SIS5595_REG_CONFIG 0x40107#define SIS5595_REG_ALARM1 0x41108#define SIS5595_REG_ALARM2 0x42109#define SIS5595_REG_FANDIV 0x47110 111/*112 * Conversions. Limit checking is only done on the TO_REG113 * variants.114 */115 116/*117 * IN: mV, (0V to 4.08V)118 * REG: 16mV/bit119 */120static inline u8 IN_TO_REG(unsigned long val)121{122 unsigned long nval = clamp_val(val, 0, 4080);123 return (nval + 8) / 16;124}125#define IN_FROM_REG(val) ((val) * 16)126 127static inline u8 FAN_TO_REG(long rpm, int div)128{129 if (rpm <= 0)130 return 255;131 if (rpm > 1350000)132 return 1;133 return clamp_val((1350000 + rpm * div / 2) / (rpm * div), 1, 254);134}135 136static inline int FAN_FROM_REG(u8 val, int div)137{138 return val == 0 ? -1 : val == 255 ? 0 : 1350000 / (val * div);139}140 141/*142 * TEMP: mC (-54.12C to +157.53C)143 * REG: 0.83C/bit + 52.12, two's complement144 */145static inline int TEMP_FROM_REG(s8 val)146{147 return val * 830 + 52120;148}149static inline s8 TEMP_TO_REG(long val)150{151 int nval = clamp_val(val, -54120, 157530) ;152 return nval < 0 ? (nval - 5212 - 415) / 830 : (nval - 5212 + 415) / 830;153}154 155/*156 * FAN DIV: 1, 2, 4, or 8157 * REG: 0, 1, 2, or 3 (respectively)158 */159#define DIV_FROM_REG(val) (1 << (val))160 161/*162 * For each registered chip, we need to keep some data in memory.163 * The structure is dynamically allocated.164 */165struct sis5595_data {166 unsigned short addr;167 const char *name;168 struct device *hwmon_dev;169 struct mutex lock;170 171 struct mutex update_lock;172 bool valid; /* true if following fields are valid */173 unsigned long last_updated; /* In jiffies */174 char maxins; /* == 3 if temp enabled, otherwise == 4 */175 u8 revision; /* Reg. value */176 177 u8 in[5]; /* Register value */178 u8 in_max[5]; /* Register value */179 u8 in_min[5]; /* Register value */180 u8 fan[2]; /* Register value */181 u8 fan_min[2]; /* Register value */182 s8 temp; /* Register value */183 s8 temp_over; /* Register value */184 s8 temp_hyst; /* Register value */185 u8 fan_div[2]; /* Register encoding, shifted right */186 u16 alarms; /* Register encoding, combined */187};188 189static struct pci_dev *s_bridge; /* pointer to the (only) sis5595 */190 191/* ISA access must be locked explicitly. */192static int sis5595_read_value(struct sis5595_data *data, u8 reg)193{194 int res;195 196 mutex_lock(&data->lock);197 outb_p(reg, data->addr + SIS5595_ADDR_REG_OFFSET);198 res = inb_p(data->addr + SIS5595_DATA_REG_OFFSET);199 mutex_unlock(&data->lock);200 return res;201}202 203static void sis5595_write_value(struct sis5595_data *data, u8 reg, u8 value)204{205 mutex_lock(&data->lock);206 outb_p(reg, data->addr + SIS5595_ADDR_REG_OFFSET);207 outb_p(value, data->addr + SIS5595_DATA_REG_OFFSET);208 mutex_unlock(&data->lock);209}210 211static struct sis5595_data *sis5595_update_device(struct device *dev)212{213 struct sis5595_data *data = dev_get_drvdata(dev);214 int i;215 216 mutex_lock(&data->update_lock);217 218 if (time_after(jiffies, data->last_updated + HZ + HZ / 2)219 || !data->valid) {220 221 for (i = 0; i <= data->maxins; i++) {222 data->in[i] =223 sis5595_read_value(data, SIS5595_REG_IN(i));224 data->in_min[i] =225 sis5595_read_value(data,226 SIS5595_REG_IN_MIN(i));227 data->in_max[i] =228 sis5595_read_value(data,229 SIS5595_REG_IN_MAX(i));230 }231 for (i = 0; i < 2; i++) {232 data->fan[i] =233 sis5595_read_value(data, SIS5595_REG_FAN(i));234 data->fan_min[i] =235 sis5595_read_value(data,236 SIS5595_REG_FAN_MIN(i));237 }238 if (data->maxins == 3) {239 data->temp =240 sis5595_read_value(data, SIS5595_REG_TEMP);241 data->temp_over =242 sis5595_read_value(data, SIS5595_REG_TEMP_OVER);243 data->temp_hyst =244 sis5595_read_value(data, SIS5595_REG_TEMP_HYST);245 }246 i = sis5595_read_value(data, SIS5595_REG_FANDIV);247 data->fan_div[0] = (i >> 4) & 0x03;248 data->fan_div[1] = i >> 6;249 data->alarms =250 sis5595_read_value(data, SIS5595_REG_ALARM1) |251 (sis5595_read_value(data, SIS5595_REG_ALARM2) << 8);252 data->last_updated = jiffies;253 data->valid = true;254 }255 256 mutex_unlock(&data->update_lock);257 258 return data;259}260 261/* 4 Voltages */262static ssize_t in_show(struct device *dev, struct device_attribute *da,263 char *buf)264{265 struct sis5595_data *data = sis5595_update_device(dev);266 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);267 int nr = attr->index;268 return sprintf(buf, "%d\n", IN_FROM_REG(data->in[nr]));269}270 271static ssize_t in_min_show(struct device *dev, struct device_attribute *da,272 char *buf)273{274 struct sis5595_data *data = sis5595_update_device(dev);275 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);276 int nr = attr->index;277 return sprintf(buf, "%d\n", IN_FROM_REG(data->in_min[nr]));278}279 280static ssize_t in_max_show(struct device *dev, struct device_attribute *da,281 char *buf)282{283 struct sis5595_data *data = sis5595_update_device(dev);284 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);285 int nr = attr->index;286 return sprintf(buf, "%d\n", IN_FROM_REG(data->in_max[nr]));287}288 289static ssize_t in_min_store(struct device *dev, struct device_attribute *da,290 const char *buf, size_t count)291{292 struct sis5595_data *data = dev_get_drvdata(dev);293 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);294 int nr = attr->index;295 unsigned long val;296 int err;297 298 err = kstrtoul(buf, 10, &val);299 if (err)300 return err;301 302 mutex_lock(&data->update_lock);303 data->in_min[nr] = IN_TO_REG(val);304 sis5595_write_value(data, SIS5595_REG_IN_MIN(nr), data->in_min[nr]);305 mutex_unlock(&data->update_lock);306 return count;307}308 309static ssize_t in_max_store(struct device *dev, struct device_attribute *da,310 const char *buf, size_t count)311{312 struct sis5595_data *data = dev_get_drvdata(dev);313 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);314 int nr = attr->index;315 unsigned long val;316 int err;317 318 err = kstrtoul(buf, 10, &val);319 if (err)320 return err;321 322 mutex_lock(&data->update_lock);323 data->in_max[nr] = IN_TO_REG(val);324 sis5595_write_value(data, SIS5595_REG_IN_MAX(nr), data->in_max[nr]);325 mutex_unlock(&data->update_lock);326 return count;327}328 329static SENSOR_DEVICE_ATTR_RO(in0_input, in, 0);330static SENSOR_DEVICE_ATTR_RW(in0_min, in_min, 0);331static SENSOR_DEVICE_ATTR_RW(in0_max, in_max, 0);332static SENSOR_DEVICE_ATTR_RO(in1_input, in, 1);333static SENSOR_DEVICE_ATTR_RW(in1_min, in_min, 1);334static SENSOR_DEVICE_ATTR_RW(in1_max, in_max, 1);335static SENSOR_DEVICE_ATTR_RO(in2_input, in, 2);336static SENSOR_DEVICE_ATTR_RW(in2_min, in_min, 2);337static SENSOR_DEVICE_ATTR_RW(in2_max, in_max, 2);338static SENSOR_DEVICE_ATTR_RO(in3_input, in, 3);339static SENSOR_DEVICE_ATTR_RW(in3_min, in_min, 3);340static SENSOR_DEVICE_ATTR_RW(in3_max, in_max, 3);341static SENSOR_DEVICE_ATTR_RO(in4_input, in, 4);342static SENSOR_DEVICE_ATTR_RW(in4_min, in_min, 4);343static SENSOR_DEVICE_ATTR_RW(in4_max, in_max, 4);344 345/* Temperature */346static ssize_t temp1_input_show(struct device *dev,347 struct device_attribute *attr, char *buf)348{349 struct sis5595_data *data = sis5595_update_device(dev);350 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp));351}352 353static ssize_t temp1_max_show(struct device *dev, struct device_attribute *attr,354 char *buf)355{356 struct sis5595_data *data = sis5595_update_device(dev);357 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_over));358}359 360static ssize_t temp1_max_store(struct device *dev,361 struct device_attribute *attr, const char *buf,362 size_t count)363{364 struct sis5595_data *data = dev_get_drvdata(dev);365 long val;366 int err;367 368 err = kstrtol(buf, 10, &val);369 if (err)370 return err;371 372 mutex_lock(&data->update_lock);373 data->temp_over = TEMP_TO_REG(val);374 sis5595_write_value(data, SIS5595_REG_TEMP_OVER, data->temp_over);375 mutex_unlock(&data->update_lock);376 return count;377}378 379static ssize_t temp1_max_hyst_show(struct device *dev,380 struct device_attribute *attr, char *buf)381{382 struct sis5595_data *data = sis5595_update_device(dev);383 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_hyst));384}385 386static ssize_t temp1_max_hyst_store(struct device *dev,387 struct device_attribute *attr,388 const char *buf, size_t count)389{390 struct sis5595_data *data = dev_get_drvdata(dev);391 long val;392 int err;393 394 err = kstrtol(buf, 10, &val);395 if (err)396 return err;397 398 mutex_lock(&data->update_lock);399 data->temp_hyst = TEMP_TO_REG(val);400 sis5595_write_value(data, SIS5595_REG_TEMP_HYST, data->temp_hyst);401 mutex_unlock(&data->update_lock);402 return count;403}404 405static DEVICE_ATTR_RO(temp1_input);406static DEVICE_ATTR_RW(temp1_max);407static DEVICE_ATTR_RW(temp1_max_hyst);408 409/* 2 Fans */410static ssize_t fan_show(struct device *dev, struct device_attribute *da,411 char *buf)412{413 struct sis5595_data *data = sis5595_update_device(dev);414 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);415 int nr = attr->index;416 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[nr],417 DIV_FROM_REG(data->fan_div[nr])));418}419 420static ssize_t fan_min_show(struct device *dev, struct device_attribute *da,421 char *buf)422{423 struct sis5595_data *data = sis5595_update_device(dev);424 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);425 int nr = attr->index;426 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[nr],427 DIV_FROM_REG(data->fan_div[nr])));428}429 430static ssize_t fan_min_store(struct device *dev, struct device_attribute *da,431 const char *buf, size_t count)432{433 struct sis5595_data *data = dev_get_drvdata(dev);434 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);435 int nr = attr->index;436 unsigned long val;437 int err;438 439 err = kstrtoul(buf, 10, &val);440 if (err)441 return err;442 443 mutex_lock(&data->update_lock);444 data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr]));445 sis5595_write_value(data, SIS5595_REG_FAN_MIN(nr), data->fan_min[nr]);446 mutex_unlock(&data->update_lock);447 return count;448}449 450static ssize_t fan_div_show(struct device *dev, struct device_attribute *da,451 char *buf)452{453 struct sis5595_data *data = sis5595_update_device(dev);454 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);455 int nr = attr->index;456 return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr]));457}458 459/*460 * Note: we save and restore the fan minimum here, because its value is461 * determined in part by the fan divisor. This follows the principle of462 * least surprise; the user doesn't expect the fan minimum to change just463 * because the divisor changed.464 */465static ssize_t fan_div_store(struct device *dev, struct device_attribute *da,466 const char *buf, size_t count)467{468 struct sis5595_data *data = dev_get_drvdata(dev);469 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);470 int nr = attr->index;471 unsigned long min;472 int reg;473 unsigned long val;474 int err;475 476 err = kstrtoul(buf, 10, &val);477 if (err)478 return err;479 480 mutex_lock(&data->update_lock);481 min = FAN_FROM_REG(data->fan_min[nr],482 DIV_FROM_REG(data->fan_div[nr]));483 reg = sis5595_read_value(data, SIS5595_REG_FANDIV);484 485 switch (val) {486 case 1:487 data->fan_div[nr] = 0;488 break;489 case 2:490 data->fan_div[nr] = 1;491 break;492 case 4:493 data->fan_div[nr] = 2;494 break;495 case 8:496 data->fan_div[nr] = 3;497 break;498 default:499 dev_err(dev,500 "fan_div value %ld not supported. Choose one of 1, 2, 4 or 8!\n",501 val);502 mutex_unlock(&data->update_lock);503 return -EINVAL;504 }505 506 switch (nr) {507 case 0:508 reg = (reg & 0xcf) | (data->fan_div[nr] << 4);509 break;510 case 1:511 reg = (reg & 0x3f) | (data->fan_div[nr] << 6);512 break;513 }514 sis5595_write_value(data, SIS5595_REG_FANDIV, reg);515 data->fan_min[nr] =516 FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr]));517 sis5595_write_value(data, SIS5595_REG_FAN_MIN(nr), data->fan_min[nr]);518 mutex_unlock(&data->update_lock);519 return count;520}521 522static SENSOR_DEVICE_ATTR_RO(fan1_input, fan, 0);523static SENSOR_DEVICE_ATTR_RW(fan1_min, fan_min, 0);524static SENSOR_DEVICE_ATTR_RW(fan1_div, fan_div, 0);525static SENSOR_DEVICE_ATTR_RO(fan2_input, fan, 1);526static SENSOR_DEVICE_ATTR_RW(fan2_min, fan_min, 1);527static SENSOR_DEVICE_ATTR_RW(fan2_div, fan_div, 1);528 529/* Alarms */530static ssize_t alarms_show(struct device *dev, struct device_attribute *attr,531 char *buf)532{533 struct sis5595_data *data = sis5595_update_device(dev);534 return sprintf(buf, "%d\n", data->alarms);535}536static DEVICE_ATTR_RO(alarms);537 538static ssize_t alarm_show(struct device *dev, struct device_attribute *da,539 char *buf)540{541 struct sis5595_data *data = sis5595_update_device(dev);542 int nr = to_sensor_dev_attr(da)->index;543 return sprintf(buf, "%u\n", (data->alarms >> nr) & 1);544}545static SENSOR_DEVICE_ATTR_RO(in0_alarm, alarm, 0);546static SENSOR_DEVICE_ATTR_RO(in1_alarm, alarm, 1);547static SENSOR_DEVICE_ATTR_RO(in2_alarm, alarm, 2);548static SENSOR_DEVICE_ATTR_RO(in3_alarm, alarm, 3);549static SENSOR_DEVICE_ATTR_RO(in4_alarm, alarm, 15);550static SENSOR_DEVICE_ATTR_RO(fan1_alarm, alarm, 6);551static SENSOR_DEVICE_ATTR_RO(fan2_alarm, alarm, 7);552static SENSOR_DEVICE_ATTR_RO(temp1_alarm, alarm, 15);553 554static ssize_t name_show(struct device *dev, struct device_attribute *attr,555 char *buf)556{557 struct sis5595_data *data = dev_get_drvdata(dev);558 return sprintf(buf, "%s\n", data->name);559}560static DEVICE_ATTR_RO(name);561 562static struct attribute *sis5595_attributes[] = {563 &sensor_dev_attr_in0_input.dev_attr.attr,564 &sensor_dev_attr_in0_min.dev_attr.attr,565 &sensor_dev_attr_in0_max.dev_attr.attr,566 &sensor_dev_attr_in0_alarm.dev_attr.attr,567 &sensor_dev_attr_in1_input.dev_attr.attr,568 &sensor_dev_attr_in1_min.dev_attr.attr,569 &sensor_dev_attr_in1_max.dev_attr.attr,570 &sensor_dev_attr_in1_alarm.dev_attr.attr,571 &sensor_dev_attr_in2_input.dev_attr.attr,572 &sensor_dev_attr_in2_min.dev_attr.attr,573 &sensor_dev_attr_in2_max.dev_attr.attr,574 &sensor_dev_attr_in2_alarm.dev_attr.attr,575 &sensor_dev_attr_in3_input.dev_attr.attr,576 &sensor_dev_attr_in3_min.dev_attr.attr,577 &sensor_dev_attr_in3_max.dev_attr.attr,578 &sensor_dev_attr_in3_alarm.dev_attr.attr,579 580 &sensor_dev_attr_fan1_input.dev_attr.attr,581 &sensor_dev_attr_fan1_min.dev_attr.attr,582 &sensor_dev_attr_fan1_div.dev_attr.attr,583 &sensor_dev_attr_fan1_alarm.dev_attr.attr,584 &sensor_dev_attr_fan2_input.dev_attr.attr,585 &sensor_dev_attr_fan2_min.dev_attr.attr,586 &sensor_dev_attr_fan2_div.dev_attr.attr,587 &sensor_dev_attr_fan2_alarm.dev_attr.attr,588 589 &dev_attr_alarms.attr,590 &dev_attr_name.attr,591 NULL592};593 594static const struct attribute_group sis5595_group = {595 .attrs = sis5595_attributes,596};597 598static struct attribute *sis5595_attributes_in4[] = {599 &sensor_dev_attr_in4_input.dev_attr.attr,600 &sensor_dev_attr_in4_min.dev_attr.attr,601 &sensor_dev_attr_in4_max.dev_attr.attr,602 &sensor_dev_attr_in4_alarm.dev_attr.attr,603 NULL604};605 606static const struct attribute_group sis5595_group_in4 = {607 .attrs = sis5595_attributes_in4,608};609 610static struct attribute *sis5595_attributes_temp1[] = {611 &dev_attr_temp1_input.attr,612 &dev_attr_temp1_max.attr,613 &dev_attr_temp1_max_hyst.attr,614 &sensor_dev_attr_temp1_alarm.dev_attr.attr,615 NULL616};617 618static const struct attribute_group sis5595_group_temp1 = {619 .attrs = sis5595_attributes_temp1,620};621 622/* Called when we have found a new SIS5595. */623static void sis5595_init_device(struct sis5595_data *data)624{625 u8 config = sis5595_read_value(data, SIS5595_REG_CONFIG);626 if (!(config & 0x01))627 sis5595_write_value(data, SIS5595_REG_CONFIG,628 (config & 0xf7) | 0x01);629}630 631/* This is called when the module is loaded */632static int sis5595_probe(struct platform_device *pdev)633{634 int err = 0;635 int i;636 struct sis5595_data *data;637 struct resource *res;638 char val;639 640 /* Reserve the ISA region */641 res = platform_get_resource(pdev, IORESOURCE_IO, 0);642 if (!devm_request_region(&pdev->dev, res->start, SIS5595_EXTENT,643 DRIVER_NAME))644 return -EBUSY;645 646 data = devm_kzalloc(&pdev->dev, sizeof(struct sis5595_data),647 GFP_KERNEL);648 if (!data)649 return -ENOMEM;650 651 mutex_init(&data->lock);652 mutex_init(&data->update_lock);653 data->addr = res->start;654 data->name = DRIVER_NAME;655 platform_set_drvdata(pdev, data);656 657 /*658 * Check revision and pin registers to determine whether 4 or 5 voltages659 */660 data->revision = s_bridge->revision;661 /* 4 voltages, 1 temp */662 data->maxins = 3;663 if (data->revision >= REV2MIN) {664 pci_read_config_byte(s_bridge, SIS5595_PIN_REG, &val);665 if (!(val & 0x80))666 /* 5 voltages, no temps */667 data->maxins = 4;668 }669 670 /* Initialize the SIS5595 chip */671 sis5595_init_device(data);672 673 /* A few vars need to be filled upon startup */674 for (i = 0; i < 2; i++) {675 data->fan_min[i] = sis5595_read_value(data,676 SIS5595_REG_FAN_MIN(i));677 }678 679 /* Register sysfs hooks */680 err = sysfs_create_group(&pdev->dev.kobj, &sis5595_group);681 if (err)682 return err;683 if (data->maxins == 4) {684 err = sysfs_create_group(&pdev->dev.kobj, &sis5595_group_in4);685 if (err)686 goto exit_remove_files;687 } else {688 err = sysfs_create_group(&pdev->dev.kobj, &sis5595_group_temp1);689 if (err)690 goto exit_remove_files;691 }692 693 data->hwmon_dev = hwmon_device_register(&pdev->dev);694 if (IS_ERR(data->hwmon_dev)) {695 err = PTR_ERR(data->hwmon_dev);696 goto exit_remove_files;697 }698 699 return 0;700 701exit_remove_files:702 sysfs_remove_group(&pdev->dev.kobj, &sis5595_group);703 sysfs_remove_group(&pdev->dev.kobj, &sis5595_group_in4);704 sysfs_remove_group(&pdev->dev.kobj, &sis5595_group_temp1);705 return err;706}707 708static void sis5595_remove(struct platform_device *pdev)709{710 struct sis5595_data *data = platform_get_drvdata(pdev);711 712 hwmon_device_unregister(data->hwmon_dev);713 sysfs_remove_group(&pdev->dev.kobj, &sis5595_group);714 sysfs_remove_group(&pdev->dev.kobj, &sis5595_group_in4);715 sysfs_remove_group(&pdev->dev.kobj, &sis5595_group_temp1);716}717 718static const struct pci_device_id sis5595_pci_ids[] = {719 { PCI_DEVICE(PCI_VENDOR_ID_SI, PCI_DEVICE_ID_SI_503) },720 { 0, }721};722 723MODULE_DEVICE_TABLE(pci, sis5595_pci_ids);724 725static int blacklist[] = {726 PCI_DEVICE_ID_SI_540,727 PCI_DEVICE_ID_SI_550,728 PCI_DEVICE_ID_SI_630,729 PCI_DEVICE_ID_SI_645,730 PCI_DEVICE_ID_SI_730,731 PCI_DEVICE_ID_SI_735,732 PCI_DEVICE_ID_SI_5511, /*733 * 5513 chip has the 0008 device but734 * that ID shows up in other chips so we735 * use the 5511 ID for recognition736 */737 PCI_DEVICE_ID_SI_5597,738 PCI_DEVICE_ID_SI_5598,739 0 };740 741static int sis5595_device_add(unsigned short address)742{743 struct resource res = {744 .start = address,745 .end = address + SIS5595_EXTENT - 1,746 .name = DRIVER_NAME,747 .flags = IORESOURCE_IO,748 };749 int err;750 751 err = acpi_check_resource_conflict(&res);752 if (err)753 goto exit;754 755 pdev = platform_device_alloc(DRIVER_NAME, address);756 if (!pdev) {757 err = -ENOMEM;758 pr_err("Device allocation failed\n");759 goto exit;760 }761 762 err = platform_device_add_resources(pdev, &res, 1);763 if (err) {764 pr_err("Device resource addition failed (%d)\n", err);765 goto exit_device_put;766 }767 768 err = platform_device_add(pdev);769 if (err) {770 pr_err("Device addition failed (%d)\n", err);771 goto exit_device_put;772 }773 774 return 0;775 776exit_device_put:777 platform_device_put(pdev);778exit:779 return err;780}781 782static struct platform_driver sis5595_driver = {783 .driver = {784 .name = DRIVER_NAME,785 },786 .probe = sis5595_probe,787 .remove_new = sis5595_remove,788};789 790static int sis5595_pci_probe(struct pci_dev *dev,791 const struct pci_device_id *id)792{793 u16 address;794 u8 enable;795 int *i, err;796 797 for (i = blacklist; *i != 0; i++) {798 struct pci_dev *d;799 d = pci_get_device(PCI_VENDOR_ID_SI, *i, NULL);800 if (d) {801 dev_err(&d->dev,802 "Looked for SIS5595 but found unsupported device %.4x\n",803 *i);804 pci_dev_put(d);805 return -ENODEV;806 }807 }808 809 force_addr &= ~(SIS5595_EXTENT - 1);810 if (force_addr) {811 dev_warn(&dev->dev, "Forcing ISA address 0x%x\n", force_addr);812 pci_write_config_word(dev, SIS5595_BASE_REG, force_addr);813 }814 815 err = pci_read_config_word(dev, SIS5595_BASE_REG, &address);816 if (err != PCIBIOS_SUCCESSFUL) {817 dev_err(&dev->dev, "Failed to read ISA address\n");818 return -ENODEV;819 }820 821 address &= ~(SIS5595_EXTENT - 1);822 if (!address) {823 dev_err(&dev->dev,824 "Base address not set - upgrade BIOS or use force_addr=0xaddr\n");825 return -ENODEV;826 }827 if (force_addr && address != force_addr) {828 /* doesn't work for some chips? */829 dev_err(&dev->dev, "Failed to force ISA address\n");830 return -ENODEV;831 }832 833 err = pci_read_config_byte(dev, SIS5595_ENABLE_REG, &enable);834 if (err != PCIBIOS_SUCCESSFUL) {835 dev_err(&dev->dev, "Failed to read enable register\n");836 return -ENODEV;837 }838 if (!(enable & 0x80)) {839 err = pci_write_config_byte(dev, SIS5595_ENABLE_REG, enable | 0x80);840 if (err != PCIBIOS_SUCCESSFUL)841 goto enable_fail;842 843 err = pci_read_config_byte(dev, SIS5595_ENABLE_REG, &enable);844 if (err != PCIBIOS_SUCCESSFUL)845 goto enable_fail;846 847 /* doesn't work for some chips! */848 if (!(enable & 0x80))849 goto enable_fail;850 }851 852 if (platform_driver_register(&sis5595_driver)) {853 dev_dbg(&dev->dev, "Failed to register sis5595 driver\n");854 goto exit;855 }856 857 s_bridge = pci_dev_get(dev);858 /* Sets global pdev as a side effect */859 if (sis5595_device_add(address))860 goto exit_unregister;861 862 /*863 * Always return failure here. This is to allow other drivers to bind864 * to this pci device. We don't really want to have control over the865 * pci device, we only wanted to read as few register values from it.866 */867 return -ENODEV;868 869enable_fail:870 dev_err(&dev->dev, "Failed to enable HWM device\n");871 goto exit;872 873exit_unregister:874 pci_dev_put(dev);875 platform_driver_unregister(&sis5595_driver);876exit:877 return -ENODEV;878}879 880static struct pci_driver sis5595_pci_driver = {881 .name = DRIVER_NAME,882 .id_table = sis5595_pci_ids,883 .probe = sis5595_pci_probe,884};885 886static int __init sm_sis5595_init(void)887{888 return pci_register_driver(&sis5595_pci_driver);889}890 891static void __exit sm_sis5595_exit(void)892{893 pci_unregister_driver(&sis5595_pci_driver);894 if (s_bridge != NULL) {895 platform_device_unregister(pdev);896 platform_driver_unregister(&sis5595_driver);897 pci_dev_put(s_bridge);898 s_bridge = NULL;899 }900}901 902MODULE_AUTHOR("Aurelien Jarno <aurelien@aurel32.net>");903MODULE_DESCRIPTION("SiS 5595 Sensor device");904MODULE_LICENSE("GPL");905 906module_init(sm_sis5595_init);907module_exit(sm_sis5595_exit);908