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 <khali@linux-fr.org> 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 /* 72 * If force_addr is set to anything different from 0, we forcibly enable 73 * the device at the given address. 74 */ 75 static u16 force_addr; 76 module_param(force_addr, ushort, 0); 77 MODULE_PARM_DESC(force_addr, 78 "Initialize the base address of the sensors"); 79 80 static struct platform_device *pdev; 81 82 /* Many SIS5595 constants specified below */ 83 84 /* Length of ISA address segment */ 85 #define SIS5595_EXTENT 8 86 /* PCI Config Registers */ 87 #define SIS5595_BASE_REG 0x68 88 #define SIS5595_PIN_REG 0x7A 89 #define SIS5595_ENABLE_REG 0x7B 90 91 /* Where are the ISA address/data registers relative to the base address */ 92 #define SIS5595_ADDR_REG_OFFSET 5 93 #define SIS5595_DATA_REG_OFFSET 6 94 95 /* The SIS5595 registers */ 96 #define SIS5595_REG_IN_MAX(nr) (0x2b + (nr) * 2) 97 #define SIS5595_REG_IN_MIN(nr) (0x2c + (nr) * 2) 98 #define SIS5595_REG_IN(nr) (0x20 + (nr)) 99 100 #define SIS5595_REG_FAN_MIN(nr) (0x3b + (nr)) 101 #define SIS5595_REG_FAN(nr) (0x28 + (nr)) 102 103 /* 104 * On the first version of the chip, the temp registers are separate. 105 * On the second version, 106 * TEMP pin is shared with IN4, configured in PCI register 0x7A. 107 * The registers are the same as well. 108 * OVER and HYST are really MAX and MIN. 109 */ 110 111 #define REV2MIN 0xb0 112 #define SIS5595_REG_TEMP (((data->revision) >= REV2MIN) ? \ 113 SIS5595_REG_IN(4) : 0x27) 114 #define SIS5595_REG_TEMP_OVER (((data->revision) >= REV2MIN) ? \ 115 SIS5595_REG_IN_MAX(4) : 0x39) 116 #define SIS5595_REG_TEMP_HYST (((data->revision) >= REV2MIN) ? \ 117 SIS5595_REG_IN_MIN(4) : 0x3a) 118 119 #define SIS5595_REG_CONFIG 0x40 120 #define SIS5595_REG_ALARM1 0x41 121 #define SIS5595_REG_ALARM2 0x42 122 #define SIS5595_REG_FANDIV 0x47 123 124 /* 125 * Conversions. Limit checking is only done on the TO_REG 126 * variants. 127 */ 128 129 /* 130 * IN: mV, (0V to 4.08V) 131 * REG: 16mV/bit 132 */ 133 static inline u8 IN_TO_REG(unsigned long val) 134 { 135 unsigned long nval = SENSORS_LIMIT(val, 0, 4080); 136 return (nval + 8) / 16; 137 } 138 #define IN_FROM_REG(val) ((val) * 16) 139 140 static inline u8 FAN_TO_REG(long rpm, int div) 141 { 142 if (rpm <= 0) 143 return 255; 144 return SENSORS_LIMIT((1350000 + rpm * div / 2) / (rpm * div), 1, 254); 145 } 146 147 static inline int FAN_FROM_REG(u8 val, int div) 148 { 149 return val == 0 ? -1 : val == 255 ? 0 : 1350000 / (val * div); 150 } 151 152 /* 153 * TEMP: mC (-54.12C to +157.53C) 154 * REG: 0.83C/bit + 52.12, two's complement 155 */ 156 static inline int TEMP_FROM_REG(s8 val) 157 { 158 return val * 830 + 52120; 159 } 160 static inline s8 TEMP_TO_REG(int val) 161 { 162 int nval = SENSORS_LIMIT(val, -54120, 157530) ; 163 return nval < 0 ? (nval - 5212 - 415) / 830 : (nval - 5212 + 415) / 830; 164 } 165 166 /* 167 * FAN DIV: 1, 2, 4, or 8 (defaults to 2) 168 * REG: 0, 1, 2, or 3 (respectively) (defaults to 1) 169 */ 170 static inline u8 DIV_TO_REG(int val) 171 { 172 return val == 8 ? 3 : val == 4 ? 2 : val == 1 ? 0 : 1; 173 } 174 #define DIV_FROM_REG(val) (1 << (val)) 175 176 /* 177 * For each registered chip, we need to keep some data in memory. 178 * The structure is dynamically allocated. 179 */ 180 struct sis5595_data { 181 unsigned short addr; 182 const char *name; 183 struct device *hwmon_dev; 184 struct mutex lock; 185 186 struct mutex update_lock; 187 char valid; /* !=0 if following fields are valid */ 188 unsigned long last_updated; /* In jiffies */ 189 char maxins; /* == 3 if temp enabled, otherwise == 4 */ 190 u8 revision; /* Reg. value */ 191 192 u8 in[5]; /* Register value */ 193 u8 in_max[5]; /* Register value */ 194 u8 in_min[5]; /* Register value */ 195 u8 fan[2]; /* Register value */ 196 u8 fan_min[2]; /* Register value */ 197 s8 temp; /* Register value */ 198 s8 temp_over; /* Register value */ 199 s8 temp_hyst; /* Register value */ 200 u8 fan_div[2]; /* Register encoding, shifted right */ 201 u16 alarms; /* Register encoding, combined */ 202 }; 203 204 static struct pci_dev *s_bridge; /* pointer to the (only) sis5595 */ 205 206 static int sis5595_probe(struct platform_device *pdev); 207 static int sis5595_remove(struct platform_device *pdev); 208 209 static int sis5595_read_value(struct sis5595_data *data, u8 reg); 210 static void sis5595_write_value(struct sis5595_data *data, u8 reg, u8 value); 211 static struct sis5595_data *sis5595_update_device(struct device *dev); 212 static void sis5595_init_device(struct sis5595_data *data); 213 214 static struct platform_driver sis5595_driver = { 215 .driver = { 216 .owner = THIS_MODULE, 217 .name = "sis5595", 218 }, 219 .probe = sis5595_probe, 220 .remove = sis5595_remove, 221 }; 222 223 /* 4 Voltages */ 224 static ssize_t show_in(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 show_in_min(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 show_in_max(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 set_in_min(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 set_in_max(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 #define show_in_offset(offset) \ 292 static SENSOR_DEVICE_ATTR(in##offset##_input, S_IRUGO, \ 293 show_in, NULL, offset); \ 294 static SENSOR_DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \ 295 show_in_min, set_in_min, offset); \ 296 static SENSOR_DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \ 297 show_in_max, set_in_max, offset); 298 299 show_in_offset(0); 300 show_in_offset(1); 301 show_in_offset(2); 302 show_in_offset(3); 303 show_in_offset(4); 304 305 /* Temperature */ 306 static ssize_t show_temp(struct device *dev, struct device_attribute *attr, 307 char *buf) 308 { 309 struct sis5595_data *data = sis5595_update_device(dev); 310 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp)); 311 } 312 313 static ssize_t show_temp_over(struct device *dev, struct device_attribute *attr, 314 char *buf) 315 { 316 struct sis5595_data *data = sis5595_update_device(dev); 317 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_over)); 318 } 319 320 static ssize_t set_temp_over(struct device *dev, struct device_attribute *attr, 321 const char *buf, size_t count) 322 { 323 struct sis5595_data *data = dev_get_drvdata(dev); 324 long val; 325 int err; 326 327 err = kstrtol(buf, 10, &val); 328 if (err) 329 return err; 330 331 mutex_lock(&data->update_lock); 332 data->temp_over = TEMP_TO_REG(val); 333 sis5595_write_value(data, SIS5595_REG_TEMP_OVER, data->temp_over); 334 mutex_unlock(&data->update_lock); 335 return count; 336 } 337 338 static ssize_t show_temp_hyst(struct device *dev, struct device_attribute *attr, 339 char *buf) 340 { 341 struct sis5595_data *data = sis5595_update_device(dev); 342 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_hyst)); 343 } 344 345 static ssize_t set_temp_hyst(struct device *dev, struct device_attribute *attr, 346 const char *buf, size_t count) 347 { 348 struct sis5595_data *data = dev_get_drvdata(dev); 349 long val; 350 int err; 351 352 err = kstrtol(buf, 10, &val); 353 if (err) 354 return err; 355 356 mutex_lock(&data->update_lock); 357 data->temp_hyst = TEMP_TO_REG(val); 358 sis5595_write_value(data, SIS5595_REG_TEMP_HYST, data->temp_hyst); 359 mutex_unlock(&data->update_lock); 360 return count; 361 } 362 363 static DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL); 364 static DEVICE_ATTR(temp1_max, S_IRUGO | S_IWUSR, 365 show_temp_over, set_temp_over); 366 static DEVICE_ATTR(temp1_max_hyst, S_IRUGO | S_IWUSR, 367 show_temp_hyst, set_temp_hyst); 368 369 /* 2 Fans */ 370 static ssize_t show_fan(struct device *dev, struct device_attribute *da, 371 char *buf) 372 { 373 struct sis5595_data *data = sis5595_update_device(dev); 374 struct sensor_device_attribute *attr = to_sensor_dev_attr(da); 375 int nr = attr->index; 376 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[nr], 377 DIV_FROM_REG(data->fan_div[nr]))); 378 } 379 380 static ssize_t show_fan_min(struct device *dev, struct device_attribute *da, 381 char *buf) 382 { 383 struct sis5595_data *data = sis5595_update_device(dev); 384 struct sensor_device_attribute *attr = to_sensor_dev_attr(da); 385 int nr = attr->index; 386 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[nr], 387 DIV_FROM_REG(data->fan_div[nr]))); 388 } 389 390 static ssize_t set_fan_min(struct device *dev, struct device_attribute *da, 391 const char *buf, size_t count) 392 { 393 struct sis5595_data *data = dev_get_drvdata(dev); 394 struct sensor_device_attribute *attr = to_sensor_dev_attr(da); 395 int nr = attr->index; 396 unsigned long val; 397 int err; 398 399 err = kstrtoul(buf, 10, &val); 400 if (err) 401 return err; 402 403 mutex_lock(&data->update_lock); 404 data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr])); 405 sis5595_write_value(data, SIS5595_REG_FAN_MIN(nr), data->fan_min[nr]); 406 mutex_unlock(&data->update_lock); 407 return count; 408 } 409 410 static ssize_t show_fan_div(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", DIV_FROM_REG(data->fan_div[nr])); 417 } 418 419 /* 420 * Note: we save and restore the fan minimum here, because its value is 421 * determined in part by the fan divisor. This follows the principle of 422 * least surprise; the user doesn't expect the fan minimum to change just 423 * because the divisor changed. 424 */ 425 static ssize_t set_fan_div(struct device *dev, struct device_attribute *da, 426 const char *buf, size_t count) 427 { 428 struct sis5595_data *data = dev_get_drvdata(dev); 429 struct sensor_device_attribute *attr = to_sensor_dev_attr(da); 430 int nr = attr->index; 431 unsigned long min; 432 int reg; 433 unsigned long val; 434 int err; 435 436 err = kstrtoul(buf, 10, &val); 437 if (err) 438 return err; 439 440 mutex_lock(&data->update_lock); 441 min = FAN_FROM_REG(data->fan_min[nr], 442 DIV_FROM_REG(data->fan_div[nr])); 443 reg = sis5595_read_value(data, SIS5595_REG_FANDIV); 444 445 switch (val) { 446 case 1: 447 data->fan_div[nr] = 0; 448 break; 449 case 2: 450 data->fan_div[nr] = 1; 451 break; 452 case 4: 453 data->fan_div[nr] = 2; 454 break; 455 case 8: 456 data->fan_div[nr] = 3; 457 break; 458 default: 459 dev_err(dev, "fan_div value %ld not " 460 "supported. Choose one of 1, 2, 4 or 8!\n", val); 461 mutex_unlock(&data->update_lock); 462 return -EINVAL; 463 } 464 465 switch (nr) { 466 case 0: 467 reg = (reg & 0xcf) | (data->fan_div[nr] << 4); 468 break; 469 case 1: 470 reg = (reg & 0x3f) | (data->fan_div[nr] << 6); 471 break; 472 } 473 sis5595_write_value(data, SIS5595_REG_FANDIV, reg); 474 data->fan_min[nr] = 475 FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr])); 476 sis5595_write_value(data, SIS5595_REG_FAN_MIN(nr), data->fan_min[nr]); 477 mutex_unlock(&data->update_lock); 478 return count; 479 } 480 481 #define show_fan_offset(offset) \ 482 static SENSOR_DEVICE_ATTR(fan##offset##_input, S_IRUGO, \ 483 show_fan, NULL, offset - 1); \ 484 static SENSOR_DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \ 485 show_fan_min, set_fan_min, offset - 1); \ 486 static SENSOR_DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR, \ 487 show_fan_div, set_fan_div, offset - 1); 488 489 show_fan_offset(1); 490 show_fan_offset(2); 491 492 /* Alarms */ 493 static ssize_t show_alarms(struct device *dev, struct device_attribute *attr, 494 char *buf) 495 { 496 struct sis5595_data *data = sis5595_update_device(dev); 497 return sprintf(buf, "%d\n", data->alarms); 498 } 499 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL); 500 501 static ssize_t show_alarm(struct device *dev, struct device_attribute *da, 502 char *buf) 503 { 504 struct sis5595_data *data = sis5595_update_device(dev); 505 int nr = to_sensor_dev_attr(da)->index; 506 return sprintf(buf, "%u\n", (data->alarms >> nr) & 1); 507 } 508 static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0); 509 static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 1); 510 static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 2); 511 static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 3); 512 static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 15); 513 static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 6); 514 static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 7); 515 static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 15); 516 517 static ssize_t show_name(struct device *dev, struct device_attribute *attr, 518 char *buf) 519 { 520 struct sis5595_data *data = dev_get_drvdata(dev); 521 return sprintf(buf, "%s\n", data->name); 522 } 523 static DEVICE_ATTR(name, S_IRUGO, show_name, NULL); 524 525 static struct attribute *sis5595_attributes[] = { 526 &sensor_dev_attr_in0_input.dev_attr.attr, 527 &sensor_dev_attr_in0_min.dev_attr.attr, 528 &sensor_dev_attr_in0_max.dev_attr.attr, 529 &sensor_dev_attr_in0_alarm.dev_attr.attr, 530 &sensor_dev_attr_in1_input.dev_attr.attr, 531 &sensor_dev_attr_in1_min.dev_attr.attr, 532 &sensor_dev_attr_in1_max.dev_attr.attr, 533 &sensor_dev_attr_in1_alarm.dev_attr.attr, 534 &sensor_dev_attr_in2_input.dev_attr.attr, 535 &sensor_dev_attr_in2_min.dev_attr.attr, 536 &sensor_dev_attr_in2_max.dev_attr.attr, 537 &sensor_dev_attr_in2_alarm.dev_attr.attr, 538 &sensor_dev_attr_in3_input.dev_attr.attr, 539 &sensor_dev_attr_in3_min.dev_attr.attr, 540 &sensor_dev_attr_in3_max.dev_attr.attr, 541 &sensor_dev_attr_in3_alarm.dev_attr.attr, 542 543 &sensor_dev_attr_fan1_input.dev_attr.attr, 544 &sensor_dev_attr_fan1_min.dev_attr.attr, 545 &sensor_dev_attr_fan1_div.dev_attr.attr, 546 &sensor_dev_attr_fan1_alarm.dev_attr.attr, 547 &sensor_dev_attr_fan2_input.dev_attr.attr, 548 &sensor_dev_attr_fan2_min.dev_attr.attr, 549 &sensor_dev_attr_fan2_div.dev_attr.attr, 550 &sensor_dev_attr_fan2_alarm.dev_attr.attr, 551 552 &dev_attr_alarms.attr, 553 &dev_attr_name.attr, 554 NULL 555 }; 556 557 static const struct attribute_group sis5595_group = { 558 .attrs = sis5595_attributes, 559 }; 560 561 static struct attribute *sis5595_attributes_in4[] = { 562 &sensor_dev_attr_in4_input.dev_attr.attr, 563 &sensor_dev_attr_in4_min.dev_attr.attr, 564 &sensor_dev_attr_in4_max.dev_attr.attr, 565 &sensor_dev_attr_in4_alarm.dev_attr.attr, 566 NULL 567 }; 568 569 static const struct attribute_group sis5595_group_in4 = { 570 .attrs = sis5595_attributes_in4, 571 }; 572 573 static struct attribute *sis5595_attributes_temp1[] = { 574 &dev_attr_temp1_input.attr, 575 &dev_attr_temp1_max.attr, 576 &dev_attr_temp1_max_hyst.attr, 577 &sensor_dev_attr_temp1_alarm.dev_attr.attr, 578 NULL 579 }; 580 581 static const struct attribute_group sis5595_group_temp1 = { 582 .attrs = sis5595_attributes_temp1, 583 }; 584 585 /* This is called when the module is loaded */ 586 static int sis5595_probe(struct platform_device *pdev) 587 { 588 int err = 0; 589 int i; 590 struct sis5595_data *data; 591 struct resource *res; 592 char val; 593 594 /* Reserve the ISA region */ 595 res = platform_get_resource(pdev, IORESOURCE_IO, 0); 596 if (!devm_request_region(&pdev->dev, res->start, SIS5595_EXTENT, 597 sis5595_driver.driver.name)) 598 return -EBUSY; 599 600 data = devm_kzalloc(&pdev->dev, sizeof(struct sis5595_data), 601 GFP_KERNEL); 602 if (!data) 603 return -ENOMEM; 604 605 mutex_init(&data->lock); 606 mutex_init(&data->update_lock); 607 data->addr = res->start; 608 data->name = "sis5595"; 609 platform_set_drvdata(pdev, data); 610 611 /* 612 * Check revision and pin registers to determine whether 4 or 5 voltages 613 */ 614 data->revision = s_bridge->revision; 615 /* 4 voltages, 1 temp */ 616 data->maxins = 3; 617 if (data->revision >= REV2MIN) { 618 pci_read_config_byte(s_bridge, SIS5595_PIN_REG, &val); 619 if (!(val & 0x80)) 620 /* 5 voltages, no temps */ 621 data->maxins = 4; 622 } 623 624 /* Initialize the SIS5595 chip */ 625 sis5595_init_device(data); 626 627 /* A few vars need to be filled upon startup */ 628 for (i = 0; i < 2; i++) { 629 data->fan_min[i] = sis5595_read_value(data, 630 SIS5595_REG_FAN_MIN(i)); 631 } 632 633 /* Register sysfs hooks */ 634 err = sysfs_create_group(&pdev->dev.kobj, &sis5595_group); 635 if (err) 636 return err; 637 if (data->maxins == 4) { 638 err = sysfs_create_group(&pdev->dev.kobj, &sis5595_group_in4); 639 if (err) 640 goto exit_remove_files; 641 } else { 642 err = sysfs_create_group(&pdev->dev.kobj, &sis5595_group_temp1); 643 if (err) 644 goto exit_remove_files; 645 } 646 647 data->hwmon_dev = hwmon_device_register(&pdev->dev); 648 if (IS_ERR(data->hwmon_dev)) { 649 err = PTR_ERR(data->hwmon_dev); 650 goto exit_remove_files; 651 } 652 653 return 0; 654 655 exit_remove_files: 656 sysfs_remove_group(&pdev->dev.kobj, &sis5595_group); 657 sysfs_remove_group(&pdev->dev.kobj, &sis5595_group_in4); 658 sysfs_remove_group(&pdev->dev.kobj, &sis5595_group_temp1); 659 return err; 660 } 661 662 static int sis5595_remove(struct platform_device *pdev) 663 { 664 struct sis5595_data *data = platform_get_drvdata(pdev); 665 666 hwmon_device_unregister(data->hwmon_dev); 667 sysfs_remove_group(&pdev->dev.kobj, &sis5595_group); 668 sysfs_remove_group(&pdev->dev.kobj, &sis5595_group_in4); 669 sysfs_remove_group(&pdev->dev.kobj, &sis5595_group_temp1); 670 671 return 0; 672 } 673 674 675 /* ISA access must be locked explicitly. */ 676 static int sis5595_read_value(struct sis5595_data *data, u8 reg) 677 { 678 int res; 679 680 mutex_lock(&data->lock); 681 outb_p(reg, data->addr + SIS5595_ADDR_REG_OFFSET); 682 res = inb_p(data->addr + SIS5595_DATA_REG_OFFSET); 683 mutex_unlock(&data->lock); 684 return res; 685 } 686 687 static void sis5595_write_value(struct sis5595_data *data, u8 reg, u8 value) 688 { 689 mutex_lock(&data->lock); 690 outb_p(reg, data->addr + SIS5595_ADDR_REG_OFFSET); 691 outb_p(value, data->addr + SIS5595_DATA_REG_OFFSET); 692 mutex_unlock(&data->lock); 693 } 694 695 /* Called when we have found a new SIS5595. */ 696 static void sis5595_init_device(struct sis5595_data *data) 697 { 698 u8 config = sis5595_read_value(data, SIS5595_REG_CONFIG); 699 if (!(config & 0x01)) 700 sis5595_write_value(data, SIS5595_REG_CONFIG, 701 (config & 0xf7) | 0x01); 702 } 703 704 static struct sis5595_data *sis5595_update_device(struct device *dev) 705 { 706 struct sis5595_data *data = dev_get_drvdata(dev); 707 int i; 708 709 mutex_lock(&data->update_lock); 710 711 if (time_after(jiffies, data->last_updated + HZ + HZ / 2) 712 || !data->valid) { 713 714 for (i = 0; i <= data->maxins; i++) { 715 data->in[i] = 716 sis5595_read_value(data, SIS5595_REG_IN(i)); 717 data->in_min[i] = 718 sis5595_read_value(data, 719 SIS5595_REG_IN_MIN(i)); 720 data->in_max[i] = 721 sis5595_read_value(data, 722 SIS5595_REG_IN_MAX(i)); 723 } 724 for (i = 0; i < 2; i++) { 725 data->fan[i] = 726 sis5595_read_value(data, SIS5595_REG_FAN(i)); 727 data->fan_min[i] = 728 sis5595_read_value(data, 729 SIS5595_REG_FAN_MIN(i)); 730 } 731 if (data->maxins == 3) { 732 data->temp = 733 sis5595_read_value(data, SIS5595_REG_TEMP); 734 data->temp_over = 735 sis5595_read_value(data, SIS5595_REG_TEMP_OVER); 736 data->temp_hyst = 737 sis5595_read_value(data, SIS5595_REG_TEMP_HYST); 738 } 739 i = sis5595_read_value(data, SIS5595_REG_FANDIV); 740 data->fan_div[0] = (i >> 4) & 0x03; 741 data->fan_div[1] = i >> 6; 742 data->alarms = 743 sis5595_read_value(data, SIS5595_REG_ALARM1) | 744 (sis5595_read_value(data, SIS5595_REG_ALARM2) << 8); 745 data->last_updated = jiffies; 746 data->valid = 1; 747 } 748 749 mutex_unlock(&data->update_lock); 750 751 return data; 752 } 753 754 static DEFINE_PCI_DEVICE_TABLE(sis5595_pci_ids) = { 755 { PCI_DEVICE(PCI_VENDOR_ID_SI, PCI_DEVICE_ID_SI_503) }, 756 { 0, } 757 }; 758 759 MODULE_DEVICE_TABLE(pci, sis5595_pci_ids); 760 761 static int blacklist[] = { 762 PCI_DEVICE_ID_SI_540, 763 PCI_DEVICE_ID_SI_550, 764 PCI_DEVICE_ID_SI_630, 765 PCI_DEVICE_ID_SI_645, 766 PCI_DEVICE_ID_SI_730, 767 PCI_DEVICE_ID_SI_735, 768 PCI_DEVICE_ID_SI_5511, /* 769 * 5513 chip has the 0008 device but 770 * that ID shows up in other chips so we 771 * use the 5511 ID for recognition 772 */ 773 PCI_DEVICE_ID_SI_5597, 774 PCI_DEVICE_ID_SI_5598, 775 0 }; 776 777 static int sis5595_device_add(unsigned short address) 778 { 779 struct resource res = { 780 .start = address, 781 .end = address + SIS5595_EXTENT - 1, 782 .name = "sis5595", 783 .flags = IORESOURCE_IO, 784 }; 785 int err; 786 787 err = acpi_check_resource_conflict(&res); 788 if (err) 789 goto exit; 790 791 pdev = platform_device_alloc("sis5595", address); 792 if (!pdev) { 793 err = -ENOMEM; 794 pr_err("Device allocation failed\n"); 795 goto exit; 796 } 797 798 err = platform_device_add_resources(pdev, &res, 1); 799 if (err) { 800 pr_err("Device resource addition failed (%d)\n", err); 801 goto exit_device_put; 802 } 803 804 err = platform_device_add(pdev); 805 if (err) { 806 pr_err("Device addition failed (%d)\n", err); 807 goto exit_device_put; 808 } 809 810 return 0; 811 812 exit_device_put: 813 platform_device_put(pdev); 814 exit: 815 return err; 816 } 817 818 static int sis5595_pci_probe(struct pci_dev *dev, 819 const struct pci_device_id *id) 820 { 821 u16 address; 822 u8 enable; 823 int *i; 824 825 for (i = blacklist; *i != 0; i++) { 826 struct pci_dev *d; 827 d = pci_get_device(PCI_VENDOR_ID_SI, *i, NULL); 828 if (d) { 829 dev_err(&d->dev, 830 "Looked for SIS5595 but found unsupported device %.4x\n", 831 *i); 832 pci_dev_put(d); 833 return -ENODEV; 834 } 835 } 836 837 force_addr &= ~(SIS5595_EXTENT - 1); 838 if (force_addr) { 839 dev_warn(&dev->dev, "Forcing ISA address 0x%x\n", force_addr); 840 pci_write_config_word(dev, SIS5595_BASE_REG, force_addr); 841 } 842 843 if (PCIBIOS_SUCCESSFUL != 844 pci_read_config_word(dev, SIS5595_BASE_REG, &address)) { 845 dev_err(&dev->dev, "Failed to read ISA address\n"); 846 return -ENODEV; 847 } 848 849 address &= ~(SIS5595_EXTENT - 1); 850 if (!address) { 851 dev_err(&dev->dev, 852 "Base address not set - upgrade BIOS or use force_addr=0xaddr\n"); 853 return -ENODEV; 854 } 855 if (force_addr && address != force_addr) { 856 /* doesn't work for some chips? */ 857 dev_err(&dev->dev, "Failed to force ISA address\n"); 858 return -ENODEV; 859 } 860 861 if (PCIBIOS_SUCCESSFUL != 862 pci_read_config_byte(dev, SIS5595_ENABLE_REG, &enable)) { 863 dev_err(&dev->dev, "Failed to read enable register\n"); 864 return -ENODEV; 865 } 866 if (!(enable & 0x80)) { 867 if ((PCIBIOS_SUCCESSFUL != 868 pci_write_config_byte(dev, SIS5595_ENABLE_REG, 869 enable | 0x80)) 870 || (PCIBIOS_SUCCESSFUL != 871 pci_read_config_byte(dev, SIS5595_ENABLE_REG, &enable)) 872 || (!(enable & 0x80))) { 873 /* doesn't work for some chips! */ 874 dev_err(&dev->dev, "Failed to enable HWM device\n"); 875 return -ENODEV; 876 } 877 } 878 879 if (platform_driver_register(&sis5595_driver)) { 880 dev_dbg(&dev->dev, "Failed to register sis5595 driver\n"); 881 goto exit; 882 } 883 884 s_bridge = pci_dev_get(dev); 885 /* Sets global pdev as a side effect */ 886 if (sis5595_device_add(address)) 887 goto exit_unregister; 888 889 /* 890 * Always return failure here. This is to allow other drivers to bind 891 * to this pci device. We don't really want to have control over the 892 * pci device, we only wanted to read as few register values from it. 893 */ 894 return -ENODEV; 895 896 exit_unregister: 897 pci_dev_put(dev); 898 platform_driver_unregister(&sis5595_driver); 899 exit: 900 return -ENODEV; 901 } 902 903 static struct pci_driver sis5595_pci_driver = { 904 .name = "sis5595", 905 .id_table = sis5595_pci_ids, 906 .probe = sis5595_pci_probe, 907 }; 908 909 static int __init sm_sis5595_init(void) 910 { 911 return pci_register_driver(&sis5595_pci_driver); 912 } 913 914 static void __exit sm_sis5595_exit(void) 915 { 916 pci_unregister_driver(&sis5595_pci_driver); 917 if (s_bridge != NULL) { 918 platform_device_unregister(pdev); 919 platform_driver_unregister(&sis5595_driver); 920 pci_dev_put(s_bridge); 921 s_bridge = NULL; 922 } 923 } 924 925 MODULE_AUTHOR("Aurelien Jarno <aurelien@aurel32.net>"); 926 MODULE_DESCRIPTION("SiS 5595 Sensor device"); 927 MODULE_LICENSE("GPL"); 928 929 module_init(sm_sis5595_init); 930 module_exit(sm_sis5595_exit); 931