1// SPDX-License-Identifier: GPL-2.0-or-later 2/* 3 * sis5595.c - Part of lm_sensors, Linux kernel modules 4 * for hardware monitoring 5 * 6 * Copyright (C) 1998 - 2001 Frodo Looijaard <frodol@dds.nl>, 7 * Kyösti Mälkki <kmalkki@cc.hut.fi>, and 8 * Mark D. Studebaker <mdsxyz123@yahoo.com> 9 * Ported to Linux 2.6 by Aurelien Jarno <aurelien@aurel32.net> with 10 * 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.c 16 * 17 * Supports following revisions: 18 * Version PCI ID PCI Revision 19 * 1 1039/0008 AF or less 20 * 2 1039/0008 B0 or greater 21 * 22 * Note: these chips contain a 0008 device which is incompatible with the 23 * 5595. We recognize these by the presence of the listed 24 * "blacklist" PCI ID and refuse to load. 25 * 26 * NOT SUPPORTED PCI ID BLACKLIST PCI ID 27 * 540 0008 0540 28 * 550 0008 0550 29 * 5513 0008 5511 30 * 5581 0008 5597 31 * 5582 0008 5597 32 * 5597 0008 5597 33 * 5598 0008 5597/5598 34 * 630 0008 0630 35 * 645 0008 0645 36 * 730 0008 0730 37 * 735 0008 0735 38 */ 39 40#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 41 42#include <linux/module.h> 43#include <linux/slab.h> 44#include <linux/ioport.h> 45#include <linux/pci.h> 46#include <linux/platform_device.h> 47#include <linux/hwmon.h> 48#include <linux/hwmon-sysfs.h> 49#include <linux/err.h> 50#include <linux/init.h> 51#include <linux/jiffies.h> 52#include <linux/mutex.h> 53#include <linux/sysfs.h> 54#include <linux/acpi.h> 55#include <linux/io.h> 56 57/* 58 * If force_addr is set to anything different from 0, we forcibly enable 59 * the device at the given address. 60 */ 61static u16 force_addr; 62module_param(force_addr, ushort, 0); 63MODULE_PARM_DESC(force_addr, 64 "Initialize the base address of the sensors"); 65 66static struct platform_device *pdev; 67 68/* Many SIS5595 constants specified below */ 69 70/* Length of ISA address segment */ 71#define SIS5595_EXTENT 8 72/* PCI Config Registers */ 73#define SIS5595_BASE_REG 0x68 74#define SIS5595_PIN_REG 0x7A 75#define SIS5595_ENABLE_REG 0x7B 76 77/* Where are the ISA address/data registers relative to the base address */ 78#define SIS5595_ADDR_REG_OFFSET 5 79#define SIS5595_DATA_REG_OFFSET 6 80 81/* The SIS5595 registers */ 82#define SIS5595_REG_IN_MAX(nr) (0x2b + (nr) * 2) 83#define SIS5595_REG_IN_MIN(nr) (0x2c + (nr) * 2) 84#define SIS5595_REG_IN(nr) (0x20 + (nr)) 85 86#define SIS5595_REG_FAN_MIN(nr) (0x3b + (nr)) 87#define SIS5595_REG_FAN(nr) (0x28 + (nr)) 88 89/* 90 * On the first version of the chip, the temp registers are separate. 91 * On the second version, 92 * TEMP pin is shared with IN4, configured in PCI register 0x7A. 93 * The registers are the same as well. 94 * OVER and HYST are really MAX and MIN. 95 */ 96 97#define REV2MIN 0xb0 98#define SIS5595_REG_TEMP (((data->revision) >= REV2MIN) ? \ 99 SIS5595_REG_IN(4) : 0x27) 100#define SIS5595_REG_TEMP_OVER (((data->revision) >= REV2MIN) ? \ 101 SIS5595_REG_IN_MAX(4) : 0x39) 102#define SIS5595_REG_TEMP_HYST (((data->revision) >= REV2MIN) ? \ 103 SIS5595_REG_IN_MIN(4) : 0x3a) 104 105#define SIS5595_REG_CONFIG 0x40 106#define SIS5595_REG_ALARM1 0x41 107#define SIS5595_REG_ALARM2 0x42 108#define SIS5595_REG_FANDIV 0x47 109 110/* 111 * Conversions. Limit checking is only done on the TO_REG 112 * variants. 113 */ 114 115/* 116 * IN: mV, (0V to 4.08V) 117 * REG: 16mV/bit 118 */ 119static inline u8 IN_TO_REG(unsigned long val) 120{ 121 unsigned long nval = clamp_val(val, 0, 4080); 122 return (nval + 8) / 16; 123} 124#define IN_FROM_REG(val) ((val) * 16) 125 126static inline u8 FAN_TO_REG(long rpm, int div) 127{ 128 if (rpm <= 0) 129 return 255; 130 if (rpm > 1350000) 131 return 1; 132 return clamp_val((1350000 + rpm * div / 2) / (rpm * div), 1, 254); 133} 134 135static inline int FAN_FROM_REG(u8 val, int div) 136{ 137 return val == 0 ? -1 : val == 255 ? 0 : 1350000 / (val * div); 138} 139 140/* 141 * TEMP: mC (-54.12C to +157.53C) 142 * REG: 0.83C/bit + 52.12, two's complement 143 */ 144static inline int TEMP_FROM_REG(s8 val) 145{ 146 return val * 830 + 52120; 147} 148static inline s8 TEMP_TO_REG(long val) 149{ 150 int nval = clamp_val(val, -54120, 157530) ; 151 return nval < 0 ? (nval - 5212 - 415) / 830 : (nval - 5212 + 415) / 830; 152} 153 154/* 155 * FAN DIV: 1, 2, 4, or 8 (defaults to 2) 156 * REG: 0, 1, 2, or 3 (respectively) (defaults to 1) 157 */ 158static inline u8 DIV_TO_REG(int val) 159{ 160 return val == 8 ? 3 : val == 4 ? 2 : val == 1 ? 0 : 1; 161} 162#define DIV_FROM_REG(val) (1 << (val)) 163 164/* 165 * For each registered chip, we need to keep some data in memory. 166 * The structure is dynamically allocated. 167 */ 168struct sis5595_data { 169 unsigned short addr; 170 const char *name; 171 struct device *hwmon_dev; 172 struct mutex lock; 173 174 struct mutex update_lock; 175 char valid; /* !=0 if following fields are valid */ 176 unsigned long last_updated; /* In jiffies */ 177 char maxins; /* == 3 if temp enabled, otherwise == 4 */ 178 u8 revision; /* Reg. value */ 179 180 u8 in[5]; /* Register value */ 181 u8 in_max[5]; /* Register value */ 182 u8 in_min[5]; /* Register value */ 183 u8 fan[2]; /* Register value */ 184 u8 fan_min[2]; /* Register value */ 185 s8 temp; /* Register value */ 186 s8 temp_over; /* Register value */ 187 s8 temp_hyst; /* Register value */ 188 u8 fan_div[2]; /* Register encoding, shifted right */ 189 u16 alarms; /* Register encoding, combined */ 190}; 191 192static struct pci_dev *s_bridge; /* pointer to the (only) sis5595 */ 193 194static int sis5595_probe(struct platform_device *pdev); 195static int sis5595_remove(struct platform_device *pdev); 196 197static int sis5595_read_value(struct sis5595_data *data, u8 reg); 198static void sis5595_write_value(struct sis5595_data *data, u8 reg, u8 value); 199static struct sis5595_data *sis5595_update_device(struct device *dev); 200static void sis5595_init_device(struct sis5595_data *data); 201 202static struct platform_driver sis5595_driver = { 203 .driver = { 204 .name = "sis5595", 205 }, 206 .probe = sis5595_probe, 207 .remove = sis5595_remove, 208}; 209 210/* 4 Voltages */ 211static ssize_t in_show(struct device *dev, struct device_attribute *da, 212 char *buf) 213{ 214 struct sis5595_data *data = sis5595_update_device(dev); 215 struct sensor_device_attribute *attr = to_sensor_dev_attr(da); 216 int nr = attr->index; 217 return sprintf(buf, "%d\n", IN_FROM_REG(data->in[nr])); 218} 219 220static ssize_t in_min_show(struct device *dev, struct device_attribute *da, 221 char *buf) 222{ 223 struct sis5595_data *data = sis5595_update_device(dev); 224 struct sensor_device_attribute *attr = to_sensor_dev_attr(da); 225 int nr = attr->index; 226 return sprintf(buf, "%d\n", IN_FROM_REG(data->in_min[nr])); 227} 228 229static ssize_t in_max_show(struct device *dev, struct device_attribute *da, 230 char *buf) 231{ 232 struct sis5595_data *data = sis5595_update_device(dev); 233 struct sensor_device_attribute *attr = to_sensor_dev_attr(da); 234 int nr = attr->index; 235 return sprintf(buf, "%d\n", IN_FROM_REG(data->in_max[nr])); 236} 237 238static ssize_t in_min_store(struct device *dev, struct device_attribute *da, 239 const char *buf, size_t count) 240{ 241 struct sis5595_data *data = dev_get_drvdata(dev); 242 struct sensor_device_attribute *attr = to_sensor_dev_attr(da); 243 int nr = attr->index; 244 unsigned long val; 245 int err; 246 247 err = kstrtoul(buf, 10, &val); 248 if (err) 249 return err; 250 251 mutex_lock(&data->update_lock); 252 data->in_min[nr] = IN_TO_REG(val); 253 sis5595_write_value(data, SIS5595_REG_IN_MIN(nr), data->in_min[nr]); 254 mutex_unlock(&data->update_lock); 255 return count; 256} 257 258static ssize_t in_max_store(struct device *dev, struct device_attribute *da, 259 const char *buf, size_t count) 260{ 261 struct sis5595_data *data = dev_get_drvdata(dev); 262 struct sensor_device_attribute *attr = to_sensor_dev_attr(da); 263 int nr = attr->index; 264 unsigned long val; 265 int err; 266 267 err = kstrtoul(buf, 10, &val); 268 if (err) 269 return err; 270 271 mutex_lock(&data->update_lock); 272 data->in_max[nr] = IN_TO_REG(val); 273 sis5595_write_value(data, SIS5595_REG_IN_MAX(nr), data->in_max[nr]); 274 mutex_unlock(&data->update_lock); 275 return count; 276} 277 278static SENSOR_DEVICE_ATTR_RO(in0_input, in, 0); 279static SENSOR_DEVICE_ATTR_RW(in0_min, in_min, 0); 280static SENSOR_DEVICE_ATTR_RW(in0_max, in_max, 0); 281static SENSOR_DEVICE_ATTR_RO(in1_input, in, 1); 282static SENSOR_DEVICE_ATTR_RW(in1_min, in_min, 1); 283static SENSOR_DEVICE_ATTR_RW(in1_max, in_max, 1); 284static SENSOR_DEVICE_ATTR_RO(in2_input, in, 2); 285static SENSOR_DEVICE_ATTR_RW(in2_min, in_min, 2); 286static SENSOR_DEVICE_ATTR_RW(in2_max, in_max, 2); 287static SENSOR_DEVICE_ATTR_RO(in3_input, in, 3); 288static SENSOR_DEVICE_ATTR_RW(in3_min, in_min, 3); 289static SENSOR_DEVICE_ATTR_RW(in3_max, in_max, 3); 290static SENSOR_DEVICE_ATTR_RO(in4_input, in, 4); 291static SENSOR_DEVICE_ATTR_RW(in4_min, in_min, 4); 292static SENSOR_DEVICE_ATTR_RW(in4_max, in_max, 4); 293 294/* Temperature */ 295static ssize_t temp1_input_show(struct device *dev, 296 struct device_attribute *attr, char *buf) 297{ 298 struct sis5595_data *data = sis5595_update_device(dev); 299 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp)); 300} 301 302static ssize_t temp1_max_show(struct device *dev, struct device_attribute *attr, 303 char *buf) 304{ 305 struct sis5595_data *data = sis5595_update_device(dev); 306 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_over)); 307} 308 309static ssize_t temp1_max_store(struct device *dev, 310 struct device_attribute *attr, const char *buf, 311 size_t count) 312{ 313 struct sis5595_data *data = dev_get_drvdata(dev); 314 long val; 315 int err; 316 317 err = kstrtol(buf, 10, &val); 318 if (err) 319 return err; 320 321 mutex_lock(&data->update_lock); 322 data->temp_over = TEMP_TO_REG(val); 323 sis5595_write_value(data, SIS5595_REG_TEMP_OVER, data->temp_over); 324 mutex_unlock(&data->update_lock); 325 return count; 326} 327 328static ssize_t temp1_max_hyst_show(struct device *dev, 329 struct device_attribute *attr, char *buf) 330{ 331 struct sis5595_data *data = sis5595_update_device(dev); 332 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_hyst)); 333} 334 335static ssize_t temp1_max_hyst_store(struct device *dev, 336 struct device_attribute *attr, 337 const char *buf, size_t count) 338{ 339 struct sis5595_data *data = dev_get_drvdata(dev); 340 long val; 341 int err; 342 343 err = kstrtol(buf, 10, &val); 344 if (err) 345 return err; 346 347 mutex_lock(&data->update_lock); 348 data->temp_hyst = TEMP_TO_REG(val); 349 sis5595_write_value(data, SIS5595_REG_TEMP_HYST, data->temp_hyst); 350 mutex_unlock(&data->update_lock); 351 return count; 352} 353 354static DEVICE_ATTR_RO(temp1_input); 355static DEVICE_ATTR_RW(temp1_max); 356static DEVICE_ATTR_RW(temp1_max_hyst); 357 358/* 2 Fans */ 359static ssize_t fan_show(struct device *dev, struct device_attribute *da, 360 char *buf) 361{ 362 struct sis5595_data *data = sis5595_update_device(dev); 363 struct sensor_device_attribute *attr = to_sensor_dev_attr(da); 364 int nr = attr->index; 365 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[nr], 366 DIV_FROM_REG(data->fan_div[nr]))); 367} 368 369static ssize_t fan_min_show(struct device *dev, struct device_attribute *da, 370 char *buf) 371{ 372 struct sis5595_data *data = sis5595_update_device(dev); 373 struct sensor_device_attribute *attr = to_sensor_dev_attr(da); 374 int nr = attr->index; 375 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[nr], 376 DIV_FROM_REG(data->fan_div[nr]))); 377} 378 379static ssize_t fan_min_store(struct device *dev, struct device_attribute *da, 380 const char *buf, size_t count) 381{ 382 struct sis5595_data *data = dev_get_drvdata(dev); 383 struct sensor_device_attribute *attr = to_sensor_dev_attr(da); 384 int nr = attr->index; 385 unsigned long val; 386 int err; 387 388 err = kstrtoul(buf, 10, &val); 389 if (err) 390 return err; 391 392 mutex_lock(&data->update_lock); 393 data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr])); 394 sis5595_write_value(data, SIS5595_REG_FAN_MIN(nr), data->fan_min[nr]); 395 mutex_unlock(&data->update_lock); 396 return count; 397} 398 399static ssize_t fan_div_show(struct device *dev, struct device_attribute *da, 400 char *buf) 401{ 402 struct sis5595_data *data = sis5595_update_device(dev); 403 struct sensor_device_attribute *attr = to_sensor_dev_attr(da); 404 int nr = attr->index; 405 return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr])); 406} 407 408/* 409 * Note: we save and restore the fan minimum here, because its value is 410 * determined in part by the fan divisor. This follows the principle of 411 * least surprise; the user doesn't expect the fan minimum to change just 412 * because the divisor changed. 413 */ 414static ssize_t fan_div_store(struct device *dev, struct device_attribute *da, 415 const char *buf, size_t count) 416{ 417 struct sis5595_data *data = dev_get_drvdata(dev); 418 struct sensor_device_attribute *attr = to_sensor_dev_attr(da); 419 int nr = attr->index; 420 unsigned long min; 421 int reg; 422 unsigned long val; 423 int err; 424 425 err = kstrtoul(buf, 10, &val); 426 if (err) 427 return err; 428 429 mutex_lock(&data->update_lock); 430 min = FAN_FROM_REG(data->fan_min[nr], 431 DIV_FROM_REG(data->fan_div[nr])); 432 reg = sis5595_read_value(data, SIS5595_REG_FANDIV); 433 434 switch (val) { 435 case 1: 436 data->fan_div[nr] = 0; 437 break; 438 case 2: 439 data->fan_div[nr] = 1; 440 break; 441 case 4: 442 data->fan_div[nr] = 2; 443 break; 444 case 8: 445 data->fan_div[nr] = 3; 446 break; 447 default: 448 dev_err(dev, 449 "fan_div value %ld not supported. Choose one of 1, 2, 4 or 8!\n", 450 val); 451 mutex_unlock(&data->update_lock); 452 return -EINVAL; 453 } 454 455 switch (nr) { 456 case 0: 457 reg = (reg & 0xcf) | (data->fan_div[nr] << 4); 458 break; 459 case 1: 460 reg = (reg & 0x3f) | (data->fan_div[nr] << 6); 461 break; 462 } 463 sis5595_write_value(data, SIS5595_REG_FANDIV, reg); 464 data->fan_min[nr] = 465 FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr])); 466 sis5595_write_value(data, SIS5595_REG_FAN_MIN(nr), data->fan_min[nr]); 467 mutex_unlock(&data->update_lock); 468 return count; 469} 470 471static SENSOR_DEVICE_ATTR_RO(fan1_input, fan, 0); 472static SENSOR_DEVICE_ATTR_RW(fan1_min, fan_min, 0); 473static SENSOR_DEVICE_ATTR_RW(fan1_div, fan_div, 0); 474static SENSOR_DEVICE_ATTR_RO(fan2_input, fan, 1); 475static SENSOR_DEVICE_ATTR_RW(fan2_min, fan_min, 1); 476static SENSOR_DEVICE_ATTR_RW(fan2_div, fan_div, 1); 477 478/* Alarms */ 479static ssize_t alarms_show(struct device *dev, struct device_attribute *attr, 480 char *buf) 481{ 482 struct sis5595_data *data = sis5595_update_device(dev); 483 return sprintf(buf, "%d\n", data->alarms); 484} 485static DEVICE_ATTR_RO(alarms); 486 487static ssize_t alarm_show(struct device *dev, struct device_attribute *da, 488 char *buf) 489{ 490 struct sis5595_data *data = sis5595_update_device(dev); 491 int nr = to_sensor_dev_attr(da)->index; 492 return sprintf(buf, "%u\n", (data->alarms >> nr) & 1); 493} 494static SENSOR_DEVICE_ATTR_RO(in0_alarm, alarm, 0); 495static SENSOR_DEVICE_ATTR_RO(in1_alarm, alarm, 1); 496static SENSOR_DEVICE_ATTR_RO(in2_alarm, alarm, 2); 497static SENSOR_DEVICE_ATTR_RO(in3_alarm, alarm, 3); 498static SENSOR_DEVICE_ATTR_RO(in4_alarm, alarm, 15); 499static SENSOR_DEVICE_ATTR_RO(fan1_alarm, alarm, 6); 500static SENSOR_DEVICE_ATTR_RO(fan2_alarm, alarm, 7); 501static SENSOR_DEVICE_ATTR_RO(temp1_alarm, alarm, 15); 502 503static ssize_t name_show(struct device *dev, struct device_attribute *attr, 504 char *buf) 505{ 506 struct sis5595_data *data = dev_get_drvdata(dev); 507 return sprintf(buf, "%s\n", data->name); 508} 509static DEVICE_ATTR_RO(name); 510 511static struct attribute *sis5595_attributes[] = { 512 &sensor_dev_attr_in0_input.dev_attr.attr, 513 &sensor_dev_attr_in0_min.dev_attr.attr, 514 &sensor_dev_attr_in0_max.dev_attr.attr, 515 &sensor_dev_attr_in0_alarm.dev_attr.attr, 516 &sensor_dev_attr_in1_input.dev_attr.attr, 517 &sensor_dev_attr_in1_min.dev_attr.attr, 518 &sensor_dev_attr_in1_max.dev_attr.attr, 519 &sensor_dev_attr_in1_alarm.dev_attr.attr, 520 &sensor_dev_attr_in2_input.dev_attr.attr, 521 &sensor_dev_attr_in2_min.dev_attr.attr, 522 &sensor_dev_attr_in2_max.dev_attr.attr, 523 &sensor_dev_attr_in2_alarm.dev_attr.attr, 524 &sensor_dev_attr_in3_input.dev_attr.attr, 525 &sensor_dev_attr_in3_min.dev_attr.attr, 526 &sensor_dev_attr_in3_max.dev_attr.attr, 527 &sensor_dev_attr_in3_alarm.dev_attr.attr, 528 529 &sensor_dev_attr_fan1_input.dev_attr.attr, 530 &sensor_dev_attr_fan1_min.dev_attr.attr, 531 &sensor_dev_attr_fan1_div.dev_attr.attr, 532 &sensor_dev_attr_fan1_alarm.dev_attr.attr, 533 &sensor_dev_attr_fan2_input.dev_attr.attr, 534 &sensor_dev_attr_fan2_min.dev_attr.attr, 535 &sensor_dev_attr_fan2_div.dev_attr.attr, 536 &sensor_dev_attr_fan2_alarm.dev_attr.attr, 537 538 &dev_attr_alarms.attr, 539 &dev_attr_name.attr, 540 NULL 541}; 542 543static const struct attribute_group sis5595_group = { 544 .attrs = sis5595_attributes, 545}; 546 547static struct attribute *sis5595_attributes_in4[] = { 548 &sensor_dev_attr_in4_input.dev_attr.attr, 549 &sensor_dev_attr_in4_min.dev_attr.attr, 550 &sensor_dev_attr_in4_max.dev_attr.attr, 551 &sensor_dev_attr_in4_alarm.dev_attr.attr, 552 NULL 553}; 554 555static const struct attribute_group sis5595_group_in4 = { 556 .attrs = sis5595_attributes_in4, 557}; 558 559static struct attribute *sis5595_attributes_temp1[] = { 560 &dev_attr_temp1_input.attr, 561 &dev_attr_temp1_max.attr, 562 &dev_attr_temp1_max_hyst.attr, 563 &sensor_dev_attr_temp1_alarm.dev_attr.attr, 564 NULL 565}; 566 567static const struct attribute_group sis5595_group_temp1 = { 568 .attrs = sis5595_attributes_temp1, 569}; 570 571/* This is called when the module is loaded */ 572static int sis5595_probe(struct platform_device *pdev) 573{ 574 int err = 0; 575 int i; 576 struct sis5595_data *data; 577 struct resource *res; 578 char val; 579 580 /* Reserve the ISA region */ 581 res = platform_get_resource(pdev, IORESOURCE_IO, 0); 582 if (!devm_request_region(&pdev->dev, res->start, SIS5595_EXTENT, 583 sis5595_driver.driver.name)) 584 return -EBUSY; 585 586 data = devm_kzalloc(&pdev->dev, sizeof(struct sis5595_data), 587 GFP_KERNEL); 588 if (!data) 589 return -ENOMEM; 590 591 mutex_init(&data->lock); 592 mutex_init(&data->update_lock); 593 data->addr = res->start; 594 data->name = "sis5595"; 595 platform_set_drvdata(pdev, data); 596 597 /* 598 * Check revision and pin registers to determine whether 4 or 5 voltages 599 */ 600 data->revision = s_bridge->revision; 601 /* 4 voltages, 1 temp */ 602 data->maxins = 3; 603 if (data->revision >= REV2MIN) { 604 pci_read_config_byte(s_bridge, SIS5595_PIN_REG, &val); 605 if (!(val & 0x80)) 606 /* 5 voltages, no temps */ 607 data->maxins = 4; 608 } 609 610 /* Initialize the SIS5595 chip */ 611 sis5595_init_device(data); 612 613 /* A few vars need to be filled upon startup */ 614 for (i = 0; i < 2; i++) { 615 data->fan_min[i] = sis5595_read_value(data, 616 SIS5595_REG_FAN_MIN(i)); 617 } 618 619 /* Register sysfs hooks */ 620 err = sysfs_create_group(&pdev->dev.kobj, &sis5595_group); 621 if (err) 622 return err; 623 if (data->maxins == 4) { 624 err = sysfs_create_group(&pdev->dev.kobj, &sis5595_group_in4); 625 if (err) 626 goto exit_remove_files; 627 } else { 628 err = sysfs_create_group(&pdev->dev.kobj, &sis5595_group_temp1); 629 if (err) 630 goto exit_remove_files; 631 } 632 633 data->hwmon_dev = hwmon_device_register(&pdev->dev); 634 if (IS_ERR(data->hwmon_dev)) { 635 err = PTR_ERR(data->hwmon_dev); 636 goto exit_remove_files; 637 } 638 639 return 0; 640 641exit_remove_files: 642 sysfs_remove_group(&pdev->dev.kobj, &sis5595_group); 643 sysfs_remove_group(&pdev->dev.kobj, &sis5595_group_in4); 644 sysfs_remove_group(&pdev->dev.kobj, &sis5595_group_temp1); 645 return err; 646} 647 648static int sis5595_remove(struct platform_device *pdev) 649{ 650 struct sis5595_data *data = platform_get_drvdata(pdev); 651 652 hwmon_device_unregister(data->hwmon_dev); 653 sysfs_remove_group(&pdev->dev.kobj, &sis5595_group); 654 sysfs_remove_group(&pdev->dev.kobj, &sis5595_group_in4); 655 sysfs_remove_group(&pdev->dev.kobj, &sis5595_group_temp1); 656 657 return 0; 658} 659 660/* ISA access must be locked explicitly. */ 661static int sis5595_read_value(struct sis5595_data *data, u8 reg) 662{ 663 int res; 664 665 mutex_lock(&data->lock); 666 outb_p(reg, data->addr + SIS5595_ADDR_REG_OFFSET); 667 res = inb_p(data->addr + SIS5595_DATA_REG_OFFSET); 668 mutex_unlock(&data->lock); 669 return res; 670} 671 672static void sis5595_write_value(struct sis5595_data *data, u8 reg, u8 value) 673{ 674 mutex_lock(&data->lock); 675 outb_p(reg, data->addr + SIS5595_ADDR_REG_OFFSET); 676 outb_p(value, data->addr + SIS5595_DATA_REG_OFFSET); 677 mutex_unlock(&data->lock); 678} 679 680/* Called when we have found a new SIS5595. */ 681static void sis5595_init_device(struct sis5595_data *data) 682{ 683 u8 config = sis5595_read_value(data, SIS5595_REG_CONFIG); 684 if (!(config & 0x01)) 685 sis5595_write_value(data, SIS5595_REG_CONFIG, 686 (config & 0xf7) | 0x01); 687} 688 689static struct sis5595_data *sis5595_update_device(struct device *dev) 690{ 691 struct sis5595_data *data = dev_get_drvdata(dev); 692 int i; 693 694 mutex_lock(&data->update_lock); 695 696 if (time_after(jiffies, data->last_updated + HZ + HZ / 2) 697 || !data->valid) { 698 699 for (i = 0; i <= data->maxins; i++) { 700 data->in[i] = 701 sis5595_read_value(data, SIS5595_REG_IN(i)); 702 data->in_min[i] = 703 sis5595_read_value(data, 704 SIS5595_REG_IN_MIN(i)); 705 data->in_max[i] = 706 sis5595_read_value(data, 707 SIS5595_REG_IN_MAX(i)); 708 } 709 for (i = 0; i < 2; i++) { 710 data->fan[i] = 711 sis5595_read_value(data, SIS5595_REG_FAN(i)); 712 data->fan_min[i] = 713 sis5595_read_value(data, 714 SIS5595_REG_FAN_MIN(i)); 715 } 716 if (data->maxins == 3) { 717 data->temp = 718 sis5595_read_value(data, SIS5595_REG_TEMP); 719 data->temp_over = 720 sis5595_read_value(data, SIS5595_REG_TEMP_OVER); 721 data->temp_hyst = 722 sis5595_read_value(data, SIS5595_REG_TEMP_HYST); 723 } 724 i = sis5595_read_value(data, SIS5595_REG_FANDIV); 725 data->fan_div[0] = (i >> 4) & 0x03; 726 data->fan_div[1] = i >> 6; 727 data->alarms = 728 sis5595_read_value(data, SIS5595_REG_ALARM1) | 729 (sis5595_read_value(data, SIS5595_REG_ALARM2) << 8); 730 data->last_updated = jiffies; 731 data->valid = 1; 732 } 733 734 mutex_unlock(&data->update_lock); 735 736 return data; 737} 738 739static const struct pci_device_id sis5595_pci_ids[] = { 740 { PCI_DEVICE(PCI_VENDOR_ID_SI, PCI_DEVICE_ID_SI_503) }, 741 { 0, } 742}; 743 744MODULE_DEVICE_TABLE(pci, sis5595_pci_ids); 745 746static int blacklist[] = { 747 PCI_DEVICE_ID_SI_540, 748 PCI_DEVICE_ID_SI_550, 749 PCI_DEVICE_ID_SI_630, 750 PCI_DEVICE_ID_SI_645, 751 PCI_DEVICE_ID_SI_730, 752 PCI_DEVICE_ID_SI_735, 753 PCI_DEVICE_ID_SI_5511, /* 754 * 5513 chip has the 0008 device but 755 * that ID shows up in other chips so we 756 * use the 5511 ID for recognition 757 */ 758 PCI_DEVICE_ID_SI_5597, 759 PCI_DEVICE_ID_SI_5598, 760 0 }; 761 762static int sis5595_device_add(unsigned short address) 763{ 764 struct resource res = { 765 .start = address, 766 .end = address + SIS5595_EXTENT - 1, 767 .name = "sis5595", 768 .flags = IORESOURCE_IO, 769 }; 770 int err; 771 772 err = acpi_check_resource_conflict(&res); 773 if (err) 774 goto exit; 775 776 pdev = platform_device_alloc("sis5595", address); 777 if (!pdev) { 778 err = -ENOMEM; 779 pr_err("Device allocation failed\n"); 780 goto exit; 781 } 782 783 err = platform_device_add_resources(pdev, &res, 1); 784 if (err) { 785 pr_err("Device resource addition failed (%d)\n", err); 786 goto exit_device_put; 787 } 788 789 err = platform_device_add(pdev); 790 if (err) { 791 pr_err("Device addition failed (%d)\n", err); 792 goto exit_device_put; 793 } 794 795 return 0; 796 797exit_device_put: 798 platform_device_put(pdev); 799exit: 800 return err; 801} 802 803static int sis5595_pci_probe(struct pci_dev *dev, 804 const struct pci_device_id *id) 805{ 806 u16 address; 807 u8 enable; 808 int *i; 809 810 for (i = blacklist; *i != 0; i++) { 811 struct pci_dev *d; 812 d = pci_get_device(PCI_VENDOR_ID_SI, *i, NULL); 813 if (d) { 814 dev_err(&d->dev, 815 "Looked for SIS5595 but found unsupported device %.4x\n", 816 *i); 817 pci_dev_put(d); 818 return -ENODEV; 819 } 820 } 821 822 force_addr &= ~(SIS5595_EXTENT - 1); 823 if (force_addr) { 824 dev_warn(&dev->dev, "Forcing ISA address 0x%x\n", force_addr); 825 pci_write_config_word(dev, SIS5595_BASE_REG, force_addr); 826 } 827 828 if (PCIBIOS_SUCCESSFUL != 829 pci_read_config_word(dev, SIS5595_BASE_REG, &address)) { 830 dev_err(&dev->dev, "Failed to read ISA address\n"); 831 return -ENODEV; 832 } 833 834 address &= ~(SIS5595_EXTENT - 1); 835 if (!address) { 836 dev_err(&dev->dev, 837 "Base address not set - upgrade BIOS or use force_addr=0xaddr\n"); 838 return -ENODEV; 839 } 840 if (force_addr && address != force_addr) { 841 /* doesn't work for some chips? */ 842 dev_err(&dev->dev, "Failed to force ISA address\n"); 843 return -ENODEV; 844 } 845 846 if (PCIBIOS_SUCCESSFUL != 847 pci_read_config_byte(dev, SIS5595_ENABLE_REG, &enable)) { 848 dev_err(&dev->dev, "Failed to read enable register\n"); 849 return -ENODEV; 850 } 851 if (!(enable & 0x80)) { 852 if ((PCIBIOS_SUCCESSFUL != 853 pci_write_config_byte(dev, SIS5595_ENABLE_REG, 854 enable | 0x80)) 855 || (PCIBIOS_SUCCESSFUL != 856 pci_read_config_byte(dev, SIS5595_ENABLE_REG, &enable)) 857 || (!(enable & 0x80))) { 858 /* doesn't work for some chips! */ 859 dev_err(&dev->dev, "Failed to enable HWM device\n"); 860 return -ENODEV; 861 } 862 } 863 864 if (platform_driver_register(&sis5595_driver)) { 865 dev_dbg(&dev->dev, "Failed to register sis5595 driver\n"); 866 goto exit; 867 } 868 869 s_bridge = pci_dev_get(dev); 870 /* Sets global pdev as a side effect */ 871 if (sis5595_device_add(address)) 872 goto exit_unregister; 873 874 /* 875 * Always return failure here. This is to allow other drivers to bind 876 * to this pci device. We don't really want to have control over the 877 * pci device, we only wanted to read as few register values from it. 878 */ 879 return -ENODEV; 880 881exit_unregister: 882 pci_dev_put(dev); 883 platform_driver_unregister(&sis5595_driver); 884exit: 885 return -ENODEV; 886} 887 888static struct pci_driver sis5595_pci_driver = { 889 .name = "sis5595", 890 .id_table = sis5595_pci_ids, 891 .probe = sis5595_pci_probe, 892}; 893 894static int __init sm_sis5595_init(void) 895{ 896 return pci_register_driver(&sis5595_pci_driver); 897} 898 899static void __exit sm_sis5595_exit(void) 900{ 901 pci_unregister_driver(&sis5595_pci_driver); 902 if (s_bridge != NULL) { 903 platform_device_unregister(pdev); 904 platform_driver_unregister(&sis5595_driver); 905 pci_dev_put(s_bridge); 906 s_bridge = NULL; 907 } 908} 909 910MODULE_AUTHOR("Aurelien Jarno <aurelien@aurel32.net>"); 911MODULE_DESCRIPTION("SiS 5595 Sensor device"); 912MODULE_LICENSE("GPL"); 913 914module_init(sm_sis5595_init); 915module_exit(sm_sis5595_exit); 916