1 /* 2 * sis5595.c - Part of lm_sensors, Linux kernel modules 3 * for hardware monitoring 4 * 5 * Copyright (C) 1998 - 2001 Frodo Looijaard <frodol@dds.nl>, 6 * Kyösti Mälkki <kmalkki@cc.hut.fi>, and 7 * Mark D. Studebaker <mdsxyz123@yahoo.com> 8 * Ported to Linux 2.6 by Aurelien Jarno <aurelien@aurel32.net> with 9 * the help of Jean Delvare <jdelvare@suse.de> 10 * 11 * This program is free software; you can redistribute it and/or modify 12 * it under the terms of the GNU General Public License as published by 13 * the Free Software Foundation; either version 2 of the License, or 14 * (at your option) any later version. 15 * 16 * This program is distributed in the hope that it will be useful, 17 * but WITHOUT ANY WARRANTY; without even the implied warranty of 18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 19 * GNU General Public License for more details. 20 * 21 * You should have received a copy of the GNU General Public License 22 * along with this program; if not, write to the Free Software 23 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 24 */ 25 26 /* 27 * SiS southbridge has a LM78-like chip integrated on the same IC. 28 * This driver is a customized copy of lm78.c 29 * 30 * Supports following revisions: 31 * Version PCI ID PCI Revision 32 * 1 1039/0008 AF or less 33 * 2 1039/0008 B0 or greater 34 * 35 * Note: these chips contain a 0008 device which is incompatible with the 36 * 5595. We recognize these by the presence of the listed 37 * "blacklist" PCI ID and refuse to load. 38 * 39 * NOT SUPPORTED PCI ID BLACKLIST PCI ID 40 * 540 0008 0540 41 * 550 0008 0550 42 * 5513 0008 5511 43 * 5581 0008 5597 44 * 5582 0008 5597 45 * 5597 0008 5597 46 * 5598 0008 5597/5598 47 * 630 0008 0630 48 * 645 0008 0645 49 * 730 0008 0730 50 * 735 0008 0735 51 */ 52 53 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 54 55 #include <linux/module.h> 56 #include <linux/slab.h> 57 #include <linux/ioport.h> 58 #include <linux/pci.h> 59 #include <linux/platform_device.h> 60 #include <linux/hwmon.h> 61 #include <linux/hwmon-sysfs.h> 62 #include <linux/err.h> 63 #include <linux/init.h> 64 #include <linux/jiffies.h> 65 #include <linux/mutex.h> 66 #include <linux/sysfs.h> 67 #include <linux/acpi.h> 68 #include <linux/io.h> 69 70 /* 71 * If force_addr is set to anything different from 0, we forcibly enable 72 * the device at the given address. 73 */ 74 static u16 force_addr; 75 module_param(force_addr, ushort, 0); 76 MODULE_PARM_DESC(force_addr, 77 "Initialize the base address of the sensors"); 78 79 static struct platform_device *pdev; 80 81 /* Many SIS5595 constants specified below */ 82 83 /* Length of ISA address segment */ 84 #define SIS5595_EXTENT 8 85 /* PCI Config Registers */ 86 #define SIS5595_BASE_REG 0x68 87 #define SIS5595_PIN_REG 0x7A 88 #define SIS5595_ENABLE_REG 0x7B 89 90 /* Where are the ISA address/data registers relative to the base address */ 91 #define SIS5595_ADDR_REG_OFFSET 5 92 #define SIS5595_DATA_REG_OFFSET 6 93 94 /* The SIS5595 registers */ 95 #define SIS5595_REG_IN_MAX(nr) (0x2b + (nr) * 2) 96 #define SIS5595_REG_IN_MIN(nr) (0x2c + (nr) * 2) 97 #define SIS5595_REG_IN(nr) (0x20 + (nr)) 98 99 #define SIS5595_REG_FAN_MIN(nr) (0x3b + (nr)) 100 #define SIS5595_REG_FAN(nr) (0x28 + (nr)) 101 102 /* 103 * On the first version of the chip, the temp registers are separate. 104 * On the second version, 105 * TEMP pin is shared with IN4, configured in PCI register 0x7A. 106 * The registers are the same as well. 107 * OVER and HYST are really MAX and MIN. 108 */ 109 110 #define REV2MIN 0xb0 111 #define SIS5595_REG_TEMP (((data->revision) >= REV2MIN) ? \ 112 SIS5595_REG_IN(4) : 0x27) 113 #define SIS5595_REG_TEMP_OVER (((data->revision) >= REV2MIN) ? \ 114 SIS5595_REG_IN_MAX(4) : 0x39) 115 #define SIS5595_REG_TEMP_HYST (((data->revision) >= REV2MIN) ? \ 116 SIS5595_REG_IN_MIN(4) : 0x3a) 117 118 #define SIS5595_REG_CONFIG 0x40 119 #define SIS5595_REG_ALARM1 0x41 120 #define SIS5595_REG_ALARM2 0x42 121 #define SIS5595_REG_FANDIV 0x47 122 123 /* 124 * Conversions. Limit checking is only done on the TO_REG 125 * variants. 126 */ 127 128 /* 129 * IN: mV, (0V to 4.08V) 130 * REG: 16mV/bit 131 */ 132 static inline u8 IN_TO_REG(unsigned long val) 133 { 134 unsigned long nval = clamp_val(val, 0, 4080); 135 return (nval + 8) / 16; 136 } 137 #define IN_FROM_REG(val) ((val) * 16) 138 139 static inline u8 FAN_TO_REG(long rpm, int div) 140 { 141 if (rpm <= 0) 142 return 255; 143 if (rpm > 1350000) 144 return 1; 145 return clamp_val((1350000 + rpm * div / 2) / (rpm * div), 1, 254); 146 } 147 148 static inline int FAN_FROM_REG(u8 val, int div) 149 { 150 return val == 0 ? -1 : val == 255 ? 0 : 1350000 / (val * div); 151 } 152 153 /* 154 * TEMP: mC (-54.12C to +157.53C) 155 * REG: 0.83C/bit + 52.12, two's complement 156 */ 157 static inline int TEMP_FROM_REG(s8 val) 158 { 159 return val * 830 + 52120; 160 } 161 static inline s8 TEMP_TO_REG(long val) 162 { 163 int nval = clamp_val(val, -54120, 157530) ; 164 return nval < 0 ? (nval - 5212 - 415) / 830 : (nval - 5212 + 415) / 830; 165 } 166 167 /* 168 * FAN DIV: 1, 2, 4, or 8 (defaults to 2) 169 * REG: 0, 1, 2, or 3 (respectively) (defaults to 1) 170 */ 171 static inline u8 DIV_TO_REG(int val) 172 { 173 return val == 8 ? 3 : val == 4 ? 2 : val == 1 ? 0 : 1; 174 } 175 #define DIV_FROM_REG(val) (1 << (val)) 176 177 /* 178 * For each registered chip, we need to keep some data in memory. 179 * The structure is dynamically allocated. 180 */ 181 struct sis5595_data { 182 unsigned short addr; 183 const char *name; 184 struct device *hwmon_dev; 185 struct mutex lock; 186 187 struct mutex update_lock; 188 char valid; /* !=0 if following fields are valid */ 189 unsigned long last_updated; /* In jiffies */ 190 char maxins; /* == 3 if temp enabled, otherwise == 4 */ 191 u8 revision; /* Reg. value */ 192 193 u8 in[5]; /* Register value */ 194 u8 in_max[5]; /* Register value */ 195 u8 in_min[5]; /* Register value */ 196 u8 fan[2]; /* Register value */ 197 u8 fan_min[2]; /* Register value */ 198 s8 temp; /* Register value */ 199 s8 temp_over; /* Register value */ 200 s8 temp_hyst; /* Register value */ 201 u8 fan_div[2]; /* Register encoding, shifted right */ 202 u16 alarms; /* Register encoding, combined */ 203 }; 204 205 static struct pci_dev *s_bridge; /* pointer to the (only) sis5595 */ 206 207 static int sis5595_probe(struct platform_device *pdev); 208 static int sis5595_remove(struct platform_device *pdev); 209 210 static int sis5595_read_value(struct sis5595_data *data, u8 reg); 211 static void sis5595_write_value(struct sis5595_data *data, u8 reg, u8 value); 212 static struct sis5595_data *sis5595_update_device(struct device *dev); 213 static void sis5595_init_device(struct sis5595_data *data); 214 215 static struct platform_driver sis5595_driver = { 216 .driver = { 217 .name = "sis5595", 218 }, 219 .probe = sis5595_probe, 220 .remove = sis5595_remove, 221 }; 222 223 /* 4 Voltages */ 224 static ssize_t in_show(struct device *dev, struct device_attribute *da, 225 char *buf) 226 { 227 struct sis5595_data *data = sis5595_update_device(dev); 228 struct sensor_device_attribute *attr = to_sensor_dev_attr(da); 229 int nr = attr->index; 230 return sprintf(buf, "%d\n", IN_FROM_REG(data->in[nr])); 231 } 232 233 static ssize_t in_min_show(struct device *dev, struct device_attribute *da, 234 char *buf) 235 { 236 struct sis5595_data *data = sis5595_update_device(dev); 237 struct sensor_device_attribute *attr = to_sensor_dev_attr(da); 238 int nr = attr->index; 239 return sprintf(buf, "%d\n", IN_FROM_REG(data->in_min[nr])); 240 } 241 242 static ssize_t in_max_show(struct device *dev, struct device_attribute *da, 243 char *buf) 244 { 245 struct sis5595_data *data = sis5595_update_device(dev); 246 struct sensor_device_attribute *attr = to_sensor_dev_attr(da); 247 int nr = attr->index; 248 return sprintf(buf, "%d\n", IN_FROM_REG(data->in_max[nr])); 249 } 250 251 static ssize_t in_min_store(struct device *dev, struct device_attribute *da, 252 const char *buf, size_t count) 253 { 254 struct sis5595_data *data = dev_get_drvdata(dev); 255 struct sensor_device_attribute *attr = to_sensor_dev_attr(da); 256 int nr = attr->index; 257 unsigned long val; 258 int err; 259 260 err = kstrtoul(buf, 10, &val); 261 if (err) 262 return err; 263 264 mutex_lock(&data->update_lock); 265 data->in_min[nr] = IN_TO_REG(val); 266 sis5595_write_value(data, SIS5595_REG_IN_MIN(nr), data->in_min[nr]); 267 mutex_unlock(&data->update_lock); 268 return count; 269 } 270 271 static ssize_t in_max_store(struct device *dev, struct device_attribute *da, 272 const char *buf, size_t count) 273 { 274 struct sis5595_data *data = dev_get_drvdata(dev); 275 struct sensor_device_attribute *attr = to_sensor_dev_attr(da); 276 int nr = attr->index; 277 unsigned long val; 278 int err; 279 280 err = kstrtoul(buf, 10, &val); 281 if (err) 282 return err; 283 284 mutex_lock(&data->update_lock); 285 data->in_max[nr] = IN_TO_REG(val); 286 sis5595_write_value(data, SIS5595_REG_IN_MAX(nr), data->in_max[nr]); 287 mutex_unlock(&data->update_lock); 288 return count; 289 } 290 291 static SENSOR_DEVICE_ATTR_RO(in0_input, in, 0); 292 static SENSOR_DEVICE_ATTR_RW(in0_min, in_min, 0); 293 static SENSOR_DEVICE_ATTR_RW(in0_max, in_max, 0); 294 static SENSOR_DEVICE_ATTR_RO(in1_input, in, 1); 295 static SENSOR_DEVICE_ATTR_RW(in1_min, in_min, 1); 296 static SENSOR_DEVICE_ATTR_RW(in1_max, in_max, 1); 297 static SENSOR_DEVICE_ATTR_RO(in2_input, in, 2); 298 static SENSOR_DEVICE_ATTR_RW(in2_min, in_min, 2); 299 static SENSOR_DEVICE_ATTR_RW(in2_max, in_max, 2); 300 static SENSOR_DEVICE_ATTR_RO(in3_input, in, 3); 301 static SENSOR_DEVICE_ATTR_RW(in3_min, in_min, 3); 302 static SENSOR_DEVICE_ATTR_RW(in3_max, in_max, 3); 303 static SENSOR_DEVICE_ATTR_RO(in4_input, in, 4); 304 static SENSOR_DEVICE_ATTR_RW(in4_min, in_min, 4); 305 static SENSOR_DEVICE_ATTR_RW(in4_max, in_max, 4); 306 307 /* Temperature */ 308 static ssize_t temp1_input_show(struct device *dev, 309 struct device_attribute *attr, char *buf) 310 { 311 struct sis5595_data *data = sis5595_update_device(dev); 312 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp)); 313 } 314 315 static ssize_t temp1_max_show(struct device *dev, struct device_attribute *attr, 316 char *buf) 317 { 318 struct sis5595_data *data = sis5595_update_device(dev); 319 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_over)); 320 } 321 322 static ssize_t temp1_max_store(struct device *dev, 323 struct device_attribute *attr, const char *buf, 324 size_t count) 325 { 326 struct sis5595_data *data = dev_get_drvdata(dev); 327 long val; 328 int err; 329 330 err = kstrtol(buf, 10, &val); 331 if (err) 332 return err; 333 334 mutex_lock(&data->update_lock); 335 data->temp_over = TEMP_TO_REG(val); 336 sis5595_write_value(data, SIS5595_REG_TEMP_OVER, data->temp_over); 337 mutex_unlock(&data->update_lock); 338 return count; 339 } 340 341 static ssize_t temp1_max_hyst_show(struct device *dev, 342 struct device_attribute *attr, char *buf) 343 { 344 struct sis5595_data *data = sis5595_update_device(dev); 345 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_hyst)); 346 } 347 348 static ssize_t temp1_max_hyst_store(struct device *dev, 349 struct device_attribute *attr, 350 const char *buf, size_t count) 351 { 352 struct sis5595_data *data = dev_get_drvdata(dev); 353 long val; 354 int err; 355 356 err = kstrtol(buf, 10, &val); 357 if (err) 358 return err; 359 360 mutex_lock(&data->update_lock); 361 data->temp_hyst = TEMP_TO_REG(val); 362 sis5595_write_value(data, SIS5595_REG_TEMP_HYST, data->temp_hyst); 363 mutex_unlock(&data->update_lock); 364 return count; 365 } 366 367 static DEVICE_ATTR_RO(temp1_input); 368 static DEVICE_ATTR_RW(temp1_max); 369 static DEVICE_ATTR_RW(temp1_max_hyst); 370 371 /* 2 Fans */ 372 static ssize_t fan_show(struct device *dev, struct device_attribute *da, 373 char *buf) 374 { 375 struct sis5595_data *data = sis5595_update_device(dev); 376 struct sensor_device_attribute *attr = to_sensor_dev_attr(da); 377 int nr = attr->index; 378 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[nr], 379 DIV_FROM_REG(data->fan_div[nr]))); 380 } 381 382 static ssize_t fan_min_show(struct device *dev, struct device_attribute *da, 383 char *buf) 384 { 385 struct sis5595_data *data = sis5595_update_device(dev); 386 struct sensor_device_attribute *attr = to_sensor_dev_attr(da); 387 int nr = attr->index; 388 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[nr], 389 DIV_FROM_REG(data->fan_div[nr]))); 390 } 391 392 static ssize_t fan_min_store(struct device *dev, struct device_attribute *da, 393 const char *buf, size_t count) 394 { 395 struct sis5595_data *data = dev_get_drvdata(dev); 396 struct sensor_device_attribute *attr = to_sensor_dev_attr(da); 397 int nr = attr->index; 398 unsigned long val; 399 int err; 400 401 err = kstrtoul(buf, 10, &val); 402 if (err) 403 return err; 404 405 mutex_lock(&data->update_lock); 406 data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr])); 407 sis5595_write_value(data, SIS5595_REG_FAN_MIN(nr), data->fan_min[nr]); 408 mutex_unlock(&data->update_lock); 409 return count; 410 } 411 412 static ssize_t fan_div_show(struct device *dev, struct device_attribute *da, 413 char *buf) 414 { 415 struct sis5595_data *data = sis5595_update_device(dev); 416 struct sensor_device_attribute *attr = to_sensor_dev_attr(da); 417 int nr = attr->index; 418 return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr])); 419 } 420 421 /* 422 * Note: we save and restore the fan minimum here, because its value is 423 * determined in part by the fan divisor. This follows the principle of 424 * least surprise; the user doesn't expect the fan minimum to change just 425 * because the divisor changed. 426 */ 427 static ssize_t fan_div_store(struct device *dev, struct device_attribute *da, 428 const char *buf, size_t count) 429 { 430 struct sis5595_data *data = dev_get_drvdata(dev); 431 struct sensor_device_attribute *attr = to_sensor_dev_attr(da); 432 int nr = attr->index; 433 unsigned long min; 434 int reg; 435 unsigned long val; 436 int err; 437 438 err = kstrtoul(buf, 10, &val); 439 if (err) 440 return err; 441 442 mutex_lock(&data->update_lock); 443 min = FAN_FROM_REG(data->fan_min[nr], 444 DIV_FROM_REG(data->fan_div[nr])); 445 reg = sis5595_read_value(data, SIS5595_REG_FANDIV); 446 447 switch (val) { 448 case 1: 449 data->fan_div[nr] = 0; 450 break; 451 case 2: 452 data->fan_div[nr] = 1; 453 break; 454 case 4: 455 data->fan_div[nr] = 2; 456 break; 457 case 8: 458 data->fan_div[nr] = 3; 459 break; 460 default: 461 dev_err(dev, 462 "fan_div value %ld not supported. Choose one of 1, 2, 4 or 8!\n", 463 val); 464 mutex_unlock(&data->update_lock); 465 return -EINVAL; 466 } 467 468 switch (nr) { 469 case 0: 470 reg = (reg & 0xcf) | (data->fan_div[nr] << 4); 471 break; 472 case 1: 473 reg = (reg & 0x3f) | (data->fan_div[nr] << 6); 474 break; 475 } 476 sis5595_write_value(data, SIS5595_REG_FANDIV, reg); 477 data->fan_min[nr] = 478 FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr])); 479 sis5595_write_value(data, SIS5595_REG_FAN_MIN(nr), data->fan_min[nr]); 480 mutex_unlock(&data->update_lock); 481 return count; 482 } 483 484 static SENSOR_DEVICE_ATTR_RO(fan1_input, fan, 0); 485 static SENSOR_DEVICE_ATTR_RW(fan1_min, fan_min, 0); 486 static SENSOR_DEVICE_ATTR_RW(fan1_div, fan_div, 0); 487 static SENSOR_DEVICE_ATTR_RO(fan2_input, fan, 1); 488 static SENSOR_DEVICE_ATTR_RW(fan2_min, fan_min, 1); 489 static SENSOR_DEVICE_ATTR_RW(fan2_div, fan_div, 1); 490 491 /* Alarms */ 492 static ssize_t alarms_show(struct device *dev, struct device_attribute *attr, 493 char *buf) 494 { 495 struct sis5595_data *data = sis5595_update_device(dev); 496 return sprintf(buf, "%d\n", data->alarms); 497 } 498 static DEVICE_ATTR_RO(alarms); 499 500 static ssize_t alarm_show(struct device *dev, struct device_attribute *da, 501 char *buf) 502 { 503 struct sis5595_data *data = sis5595_update_device(dev); 504 int nr = to_sensor_dev_attr(da)->index; 505 return sprintf(buf, "%u\n", (data->alarms >> nr) & 1); 506 } 507 static SENSOR_DEVICE_ATTR_RO(in0_alarm, alarm, 0); 508 static SENSOR_DEVICE_ATTR_RO(in1_alarm, alarm, 1); 509 static SENSOR_DEVICE_ATTR_RO(in2_alarm, alarm, 2); 510 static SENSOR_DEVICE_ATTR_RO(in3_alarm, alarm, 3); 511 static SENSOR_DEVICE_ATTR_RO(in4_alarm, alarm, 15); 512 static SENSOR_DEVICE_ATTR_RO(fan1_alarm, alarm, 6); 513 static SENSOR_DEVICE_ATTR_RO(fan2_alarm, alarm, 7); 514 static SENSOR_DEVICE_ATTR_RO(temp1_alarm, alarm, 15); 515 516 static ssize_t name_show(struct device *dev, struct device_attribute *attr, 517 char *buf) 518 { 519 struct sis5595_data *data = dev_get_drvdata(dev); 520 return sprintf(buf, "%s\n", data->name); 521 } 522 static DEVICE_ATTR_RO(name); 523 524 static struct attribute *sis5595_attributes[] = { 525 &sensor_dev_attr_in0_input.dev_attr.attr, 526 &sensor_dev_attr_in0_min.dev_attr.attr, 527 &sensor_dev_attr_in0_max.dev_attr.attr, 528 &sensor_dev_attr_in0_alarm.dev_attr.attr, 529 &sensor_dev_attr_in1_input.dev_attr.attr, 530 &sensor_dev_attr_in1_min.dev_attr.attr, 531 &sensor_dev_attr_in1_max.dev_attr.attr, 532 &sensor_dev_attr_in1_alarm.dev_attr.attr, 533 &sensor_dev_attr_in2_input.dev_attr.attr, 534 &sensor_dev_attr_in2_min.dev_attr.attr, 535 &sensor_dev_attr_in2_max.dev_attr.attr, 536 &sensor_dev_attr_in2_alarm.dev_attr.attr, 537 &sensor_dev_attr_in3_input.dev_attr.attr, 538 &sensor_dev_attr_in3_min.dev_attr.attr, 539 &sensor_dev_attr_in3_max.dev_attr.attr, 540 &sensor_dev_attr_in3_alarm.dev_attr.attr, 541 542 &sensor_dev_attr_fan1_input.dev_attr.attr, 543 &sensor_dev_attr_fan1_min.dev_attr.attr, 544 &sensor_dev_attr_fan1_div.dev_attr.attr, 545 &sensor_dev_attr_fan1_alarm.dev_attr.attr, 546 &sensor_dev_attr_fan2_input.dev_attr.attr, 547 &sensor_dev_attr_fan2_min.dev_attr.attr, 548 &sensor_dev_attr_fan2_div.dev_attr.attr, 549 &sensor_dev_attr_fan2_alarm.dev_attr.attr, 550 551 &dev_attr_alarms.attr, 552 &dev_attr_name.attr, 553 NULL 554 }; 555 556 static const struct attribute_group sis5595_group = { 557 .attrs = sis5595_attributes, 558 }; 559 560 static struct attribute *sis5595_attributes_in4[] = { 561 &sensor_dev_attr_in4_input.dev_attr.attr, 562 &sensor_dev_attr_in4_min.dev_attr.attr, 563 &sensor_dev_attr_in4_max.dev_attr.attr, 564 &sensor_dev_attr_in4_alarm.dev_attr.attr, 565 NULL 566 }; 567 568 static const struct attribute_group sis5595_group_in4 = { 569 .attrs = sis5595_attributes_in4, 570 }; 571 572 static struct attribute *sis5595_attributes_temp1[] = { 573 &dev_attr_temp1_input.attr, 574 &dev_attr_temp1_max.attr, 575 &dev_attr_temp1_max_hyst.attr, 576 &sensor_dev_attr_temp1_alarm.dev_attr.attr, 577 NULL 578 }; 579 580 static const struct attribute_group sis5595_group_temp1 = { 581 .attrs = sis5595_attributes_temp1, 582 }; 583 584 /* This is called when the module is loaded */ 585 static int sis5595_probe(struct platform_device *pdev) 586 { 587 int err = 0; 588 int i; 589 struct sis5595_data *data; 590 struct resource *res; 591 char val; 592 593 /* Reserve the ISA region */ 594 res = platform_get_resource(pdev, IORESOURCE_IO, 0); 595 if (!devm_request_region(&pdev->dev, res->start, SIS5595_EXTENT, 596 sis5595_driver.driver.name)) 597 return -EBUSY; 598 599 data = devm_kzalloc(&pdev->dev, sizeof(struct sis5595_data), 600 GFP_KERNEL); 601 if (!data) 602 return -ENOMEM; 603 604 mutex_init(&data->lock); 605 mutex_init(&data->update_lock); 606 data->addr = res->start; 607 data->name = "sis5595"; 608 platform_set_drvdata(pdev, data); 609 610 /* 611 * Check revision and pin registers to determine whether 4 or 5 voltages 612 */ 613 data->revision = s_bridge->revision; 614 /* 4 voltages, 1 temp */ 615 data->maxins = 3; 616 if (data->revision >= REV2MIN) { 617 pci_read_config_byte(s_bridge, SIS5595_PIN_REG, &val); 618 if (!(val & 0x80)) 619 /* 5 voltages, no temps */ 620 data->maxins = 4; 621 } 622 623 /* Initialize the SIS5595 chip */ 624 sis5595_init_device(data); 625 626 /* A few vars need to be filled upon startup */ 627 for (i = 0; i < 2; i++) { 628 data->fan_min[i] = sis5595_read_value(data, 629 SIS5595_REG_FAN_MIN(i)); 630 } 631 632 /* Register sysfs hooks */ 633 err = sysfs_create_group(&pdev->dev.kobj, &sis5595_group); 634 if (err) 635 return err; 636 if (data->maxins == 4) { 637 err = sysfs_create_group(&pdev->dev.kobj, &sis5595_group_in4); 638 if (err) 639 goto exit_remove_files; 640 } else { 641 err = sysfs_create_group(&pdev->dev.kobj, &sis5595_group_temp1); 642 if (err) 643 goto exit_remove_files; 644 } 645 646 data->hwmon_dev = hwmon_device_register(&pdev->dev); 647 if (IS_ERR(data->hwmon_dev)) { 648 err = PTR_ERR(data->hwmon_dev); 649 goto exit_remove_files; 650 } 651 652 return 0; 653 654 exit_remove_files: 655 sysfs_remove_group(&pdev->dev.kobj, &sis5595_group); 656 sysfs_remove_group(&pdev->dev.kobj, &sis5595_group_in4); 657 sysfs_remove_group(&pdev->dev.kobj, &sis5595_group_temp1); 658 return err; 659 } 660 661 static int sis5595_remove(struct platform_device *pdev) 662 { 663 struct sis5595_data *data = platform_get_drvdata(pdev); 664 665 hwmon_device_unregister(data->hwmon_dev); 666 sysfs_remove_group(&pdev->dev.kobj, &sis5595_group); 667 sysfs_remove_group(&pdev->dev.kobj, &sis5595_group_in4); 668 sysfs_remove_group(&pdev->dev.kobj, &sis5595_group_temp1); 669 670 return 0; 671 } 672 673 /* ISA access must be locked explicitly. */ 674 static int sis5595_read_value(struct sis5595_data *data, u8 reg) 675 { 676 int res; 677 678 mutex_lock(&data->lock); 679 outb_p(reg, data->addr + SIS5595_ADDR_REG_OFFSET); 680 res = inb_p(data->addr + SIS5595_DATA_REG_OFFSET); 681 mutex_unlock(&data->lock); 682 return res; 683 } 684 685 static void sis5595_write_value(struct sis5595_data *data, u8 reg, u8 value) 686 { 687 mutex_lock(&data->lock); 688 outb_p(reg, data->addr + SIS5595_ADDR_REG_OFFSET); 689 outb_p(value, data->addr + SIS5595_DATA_REG_OFFSET); 690 mutex_unlock(&data->lock); 691 } 692 693 /* Called when we have found a new SIS5595. */ 694 static void sis5595_init_device(struct sis5595_data *data) 695 { 696 u8 config = sis5595_read_value(data, SIS5595_REG_CONFIG); 697 if (!(config & 0x01)) 698 sis5595_write_value(data, SIS5595_REG_CONFIG, 699 (config & 0xf7) | 0x01); 700 } 701 702 static struct sis5595_data *sis5595_update_device(struct device *dev) 703 { 704 struct sis5595_data *data = dev_get_drvdata(dev); 705 int i; 706 707 mutex_lock(&data->update_lock); 708 709 if (time_after(jiffies, data->last_updated + HZ + HZ / 2) 710 || !data->valid) { 711 712 for (i = 0; i <= data->maxins; i++) { 713 data->in[i] = 714 sis5595_read_value(data, SIS5595_REG_IN(i)); 715 data->in_min[i] = 716 sis5595_read_value(data, 717 SIS5595_REG_IN_MIN(i)); 718 data->in_max[i] = 719 sis5595_read_value(data, 720 SIS5595_REG_IN_MAX(i)); 721 } 722 for (i = 0; i < 2; i++) { 723 data->fan[i] = 724 sis5595_read_value(data, SIS5595_REG_FAN(i)); 725 data->fan_min[i] = 726 sis5595_read_value(data, 727 SIS5595_REG_FAN_MIN(i)); 728 } 729 if (data->maxins == 3) { 730 data->temp = 731 sis5595_read_value(data, SIS5595_REG_TEMP); 732 data->temp_over = 733 sis5595_read_value(data, SIS5595_REG_TEMP_OVER); 734 data->temp_hyst = 735 sis5595_read_value(data, SIS5595_REG_TEMP_HYST); 736 } 737 i = sis5595_read_value(data, SIS5595_REG_FANDIV); 738 data->fan_div[0] = (i >> 4) & 0x03; 739 data->fan_div[1] = i >> 6; 740 data->alarms = 741 sis5595_read_value(data, SIS5595_REG_ALARM1) | 742 (sis5595_read_value(data, SIS5595_REG_ALARM2) << 8); 743 data->last_updated = jiffies; 744 data->valid = 1; 745 } 746 747 mutex_unlock(&data->update_lock); 748 749 return data; 750 } 751 752 static const struct pci_device_id sis5595_pci_ids[] = { 753 { PCI_DEVICE(PCI_VENDOR_ID_SI, PCI_DEVICE_ID_SI_503) }, 754 { 0, } 755 }; 756 757 MODULE_DEVICE_TABLE(pci, sis5595_pci_ids); 758 759 static int blacklist[] = { 760 PCI_DEVICE_ID_SI_540, 761 PCI_DEVICE_ID_SI_550, 762 PCI_DEVICE_ID_SI_630, 763 PCI_DEVICE_ID_SI_645, 764 PCI_DEVICE_ID_SI_730, 765 PCI_DEVICE_ID_SI_735, 766 PCI_DEVICE_ID_SI_5511, /* 767 * 5513 chip has the 0008 device but 768 * that ID shows up in other chips so we 769 * use the 5511 ID for recognition 770 */ 771 PCI_DEVICE_ID_SI_5597, 772 PCI_DEVICE_ID_SI_5598, 773 0 }; 774 775 static int sis5595_device_add(unsigned short address) 776 { 777 struct resource res = { 778 .start = address, 779 .end = address + SIS5595_EXTENT - 1, 780 .name = "sis5595", 781 .flags = IORESOURCE_IO, 782 }; 783 int err; 784 785 err = acpi_check_resource_conflict(&res); 786 if (err) 787 goto exit; 788 789 pdev = platform_device_alloc("sis5595", address); 790 if (!pdev) { 791 err = -ENOMEM; 792 pr_err("Device allocation failed\n"); 793 goto exit; 794 } 795 796 err = platform_device_add_resources(pdev, &res, 1); 797 if (err) { 798 pr_err("Device resource addition failed (%d)\n", err); 799 goto exit_device_put; 800 } 801 802 err = platform_device_add(pdev); 803 if (err) { 804 pr_err("Device addition failed (%d)\n", err); 805 goto exit_device_put; 806 } 807 808 return 0; 809 810 exit_device_put: 811 platform_device_put(pdev); 812 exit: 813 return err; 814 } 815 816 static int sis5595_pci_probe(struct pci_dev *dev, 817 const struct pci_device_id *id) 818 { 819 u16 address; 820 u8 enable; 821 int *i; 822 823 for (i = blacklist; *i != 0; i++) { 824 struct pci_dev *d; 825 d = pci_get_device(PCI_VENDOR_ID_SI, *i, NULL); 826 if (d) { 827 dev_err(&d->dev, 828 "Looked for SIS5595 but found unsupported device %.4x\n", 829 *i); 830 pci_dev_put(d); 831 return -ENODEV; 832 } 833 } 834 835 force_addr &= ~(SIS5595_EXTENT - 1); 836 if (force_addr) { 837 dev_warn(&dev->dev, "Forcing ISA address 0x%x\n", force_addr); 838 pci_write_config_word(dev, SIS5595_BASE_REG, force_addr); 839 } 840 841 if (PCIBIOS_SUCCESSFUL != 842 pci_read_config_word(dev, SIS5595_BASE_REG, &address)) { 843 dev_err(&dev->dev, "Failed to read ISA address\n"); 844 return -ENODEV; 845 } 846 847 address &= ~(SIS5595_EXTENT - 1); 848 if (!address) { 849 dev_err(&dev->dev, 850 "Base address not set - upgrade BIOS or use force_addr=0xaddr\n"); 851 return -ENODEV; 852 } 853 if (force_addr && address != force_addr) { 854 /* doesn't work for some chips? */ 855 dev_err(&dev->dev, "Failed to force ISA address\n"); 856 return -ENODEV; 857 } 858 859 if (PCIBIOS_SUCCESSFUL != 860 pci_read_config_byte(dev, SIS5595_ENABLE_REG, &enable)) { 861 dev_err(&dev->dev, "Failed to read enable register\n"); 862 return -ENODEV; 863 } 864 if (!(enable & 0x80)) { 865 if ((PCIBIOS_SUCCESSFUL != 866 pci_write_config_byte(dev, SIS5595_ENABLE_REG, 867 enable | 0x80)) 868 || (PCIBIOS_SUCCESSFUL != 869 pci_read_config_byte(dev, SIS5595_ENABLE_REG, &enable)) 870 || (!(enable & 0x80))) { 871 /* doesn't work for some chips! */ 872 dev_err(&dev->dev, "Failed to enable HWM device\n"); 873 return -ENODEV; 874 } 875 } 876 877 if (platform_driver_register(&sis5595_driver)) { 878 dev_dbg(&dev->dev, "Failed to register sis5595 driver\n"); 879 goto exit; 880 } 881 882 s_bridge = pci_dev_get(dev); 883 /* Sets global pdev as a side effect */ 884 if (sis5595_device_add(address)) 885 goto exit_unregister; 886 887 /* 888 * Always return failure here. This is to allow other drivers to bind 889 * to this pci device. We don't really want to have control over the 890 * pci device, we only wanted to read as few register values from it. 891 */ 892 return -ENODEV; 893 894 exit_unregister: 895 pci_dev_put(dev); 896 platform_driver_unregister(&sis5595_driver); 897 exit: 898 return -ENODEV; 899 } 900 901 static struct pci_driver sis5595_pci_driver = { 902 .name = "sis5595", 903 .id_table = sis5595_pci_ids, 904 .probe = sis5595_pci_probe, 905 }; 906 907 static int __init sm_sis5595_init(void) 908 { 909 return pci_register_driver(&sis5595_pci_driver); 910 } 911 912 static void __exit sm_sis5595_exit(void) 913 { 914 pci_unregister_driver(&sis5595_pci_driver); 915 if (s_bridge != NULL) { 916 platform_device_unregister(pdev); 917 platform_driver_unregister(&sis5595_driver); 918 pci_dev_put(s_bridge); 919 s_bridge = NULL; 920 } 921 } 922 923 MODULE_AUTHOR("Aurelien Jarno <aurelien@aurel32.net>"); 924 MODULE_DESCRIPTION("SiS 5595 Sensor device"); 925 MODULE_LICENSE("GPL"); 926 927 module_init(sm_sis5595_init); 928 module_exit(sm_sis5595_exit); 929