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