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 /* 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 = clamp_val(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 if (rpm > 1350000) 145 return 1; 146 return clamp_val((1350000 + rpm * div / 2) / (rpm * div), 1, 254); 147 } 148 149 static inline int FAN_FROM_REG(u8 val, int div) 150 { 151 return val == 0 ? -1 : val == 255 ? 0 : 1350000 / (val * div); 152 } 153 154 /* 155 * TEMP: mC (-54.12C to +157.53C) 156 * REG: 0.83C/bit + 52.12, two's complement 157 */ 158 static inline int TEMP_FROM_REG(s8 val) 159 { 160 return val * 830 + 52120; 161 } 162 static inline s8 TEMP_TO_REG(long val) 163 { 164 int nval = clamp_val(val, -54120, 157530) ; 165 return nval < 0 ? (nval - 5212 - 415) / 830 : (nval - 5212 + 415) / 830; 166 } 167 168 /* 169 * FAN DIV: 1, 2, 4, or 8 (defaults to 2) 170 * REG: 0, 1, 2, or 3 (respectively) (defaults to 1) 171 */ 172 static inline u8 DIV_TO_REG(int val) 173 { 174 return val == 8 ? 3 : val == 4 ? 2 : val == 1 ? 0 : 1; 175 } 176 #define DIV_FROM_REG(val) (1 << (val)) 177 178 /* 179 * For each registered chip, we need to keep some data in memory. 180 * The structure is dynamically allocated. 181 */ 182 struct sis5595_data { 183 unsigned short addr; 184 const char *name; 185 struct device *hwmon_dev; 186 struct mutex lock; 187 188 struct mutex update_lock; 189 char valid; /* !=0 if following fields are valid */ 190 unsigned long last_updated; /* In jiffies */ 191 char maxins; /* == 3 if temp enabled, otherwise == 4 */ 192 u8 revision; /* Reg. value */ 193 194 u8 in[5]; /* Register value */ 195 u8 in_max[5]; /* Register value */ 196 u8 in_min[5]; /* Register value */ 197 u8 fan[2]; /* Register value */ 198 u8 fan_min[2]; /* Register value */ 199 s8 temp; /* Register value */ 200 s8 temp_over; /* Register value */ 201 s8 temp_hyst; /* Register value */ 202 u8 fan_div[2]; /* Register encoding, shifted right */ 203 u16 alarms; /* Register encoding, combined */ 204 }; 205 206 static struct pci_dev *s_bridge; /* pointer to the (only) sis5595 */ 207 208 static int sis5595_probe(struct platform_device *pdev); 209 static int sis5595_remove(struct platform_device *pdev); 210 211 static int sis5595_read_value(struct sis5595_data *data, u8 reg); 212 static void sis5595_write_value(struct sis5595_data *data, u8 reg, u8 value); 213 static struct sis5595_data *sis5595_update_device(struct device *dev); 214 static void sis5595_init_device(struct sis5595_data *data); 215 216 static struct platform_driver sis5595_driver = { 217 .driver = { 218 .name = "sis5595", 219 }, 220 .probe = sis5595_probe, 221 .remove = sis5595_remove, 222 }; 223 224 /* 4 Voltages */ 225 static ssize_t show_in(struct device *dev, struct device_attribute *da, 226 char *buf) 227 { 228 struct sis5595_data *data = sis5595_update_device(dev); 229 struct sensor_device_attribute *attr = to_sensor_dev_attr(da); 230 int nr = attr->index; 231 return sprintf(buf, "%d\n", IN_FROM_REG(data->in[nr])); 232 } 233 234 static ssize_t show_in_min(struct device *dev, struct device_attribute *da, 235 char *buf) 236 { 237 struct sis5595_data *data = sis5595_update_device(dev); 238 struct sensor_device_attribute *attr = to_sensor_dev_attr(da); 239 int nr = attr->index; 240 return sprintf(buf, "%d\n", IN_FROM_REG(data->in_min[nr])); 241 } 242 243 static ssize_t show_in_max(struct device *dev, struct device_attribute *da, 244 char *buf) 245 { 246 struct sis5595_data *data = sis5595_update_device(dev); 247 struct sensor_device_attribute *attr = to_sensor_dev_attr(da); 248 int nr = attr->index; 249 return sprintf(buf, "%d\n", IN_FROM_REG(data->in_max[nr])); 250 } 251 252 static ssize_t set_in_min(struct device *dev, struct device_attribute *da, 253 const char *buf, size_t count) 254 { 255 struct sis5595_data *data = dev_get_drvdata(dev); 256 struct sensor_device_attribute *attr = to_sensor_dev_attr(da); 257 int nr = attr->index; 258 unsigned long val; 259 int err; 260 261 err = kstrtoul(buf, 10, &val); 262 if (err) 263 return err; 264 265 mutex_lock(&data->update_lock); 266 data->in_min[nr] = IN_TO_REG(val); 267 sis5595_write_value(data, SIS5595_REG_IN_MIN(nr), data->in_min[nr]); 268 mutex_unlock(&data->update_lock); 269 return count; 270 } 271 272 static ssize_t set_in_max(struct device *dev, struct device_attribute *da, 273 const char *buf, size_t count) 274 { 275 struct sis5595_data *data = dev_get_drvdata(dev); 276 struct sensor_device_attribute *attr = to_sensor_dev_attr(da); 277 int nr = attr->index; 278 unsigned long val; 279 int err; 280 281 err = kstrtoul(buf, 10, &val); 282 if (err) 283 return err; 284 285 mutex_lock(&data->update_lock); 286 data->in_max[nr] = IN_TO_REG(val); 287 sis5595_write_value(data, SIS5595_REG_IN_MAX(nr), data->in_max[nr]); 288 mutex_unlock(&data->update_lock); 289 return count; 290 } 291 292 #define show_in_offset(offset) \ 293 static SENSOR_DEVICE_ATTR(in##offset##_input, S_IRUGO, \ 294 show_in, NULL, offset); \ 295 static SENSOR_DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \ 296 show_in_min, set_in_min, offset); \ 297 static SENSOR_DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \ 298 show_in_max, set_in_max, offset); 299 300 show_in_offset(0); 301 show_in_offset(1); 302 show_in_offset(2); 303 show_in_offset(3); 304 show_in_offset(4); 305 306 /* Temperature */ 307 static ssize_t show_temp(struct device *dev, struct device_attribute *attr, 308 char *buf) 309 { 310 struct sis5595_data *data = sis5595_update_device(dev); 311 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp)); 312 } 313 314 static ssize_t show_temp_over(struct device *dev, struct device_attribute *attr, 315 char *buf) 316 { 317 struct sis5595_data *data = sis5595_update_device(dev); 318 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_over)); 319 } 320 321 static ssize_t set_temp_over(struct device *dev, struct device_attribute *attr, 322 const char *buf, size_t count) 323 { 324 struct sis5595_data *data = dev_get_drvdata(dev); 325 long val; 326 int err; 327 328 err = kstrtol(buf, 10, &val); 329 if (err) 330 return err; 331 332 mutex_lock(&data->update_lock); 333 data->temp_over = TEMP_TO_REG(val); 334 sis5595_write_value(data, SIS5595_REG_TEMP_OVER, data->temp_over); 335 mutex_unlock(&data->update_lock); 336 return count; 337 } 338 339 static ssize_t show_temp_hyst(struct device *dev, struct device_attribute *attr, 340 char *buf) 341 { 342 struct sis5595_data *data = sis5595_update_device(dev); 343 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_hyst)); 344 } 345 346 static ssize_t set_temp_hyst(struct device *dev, struct device_attribute *attr, 347 const char *buf, size_t count) 348 { 349 struct sis5595_data *data = dev_get_drvdata(dev); 350 long val; 351 int err; 352 353 err = kstrtol(buf, 10, &val); 354 if (err) 355 return err; 356 357 mutex_lock(&data->update_lock); 358 data->temp_hyst = TEMP_TO_REG(val); 359 sis5595_write_value(data, SIS5595_REG_TEMP_HYST, data->temp_hyst); 360 mutex_unlock(&data->update_lock); 361 return count; 362 } 363 364 static DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL); 365 static DEVICE_ATTR(temp1_max, S_IRUGO | S_IWUSR, 366 show_temp_over, set_temp_over); 367 static DEVICE_ATTR(temp1_max_hyst, S_IRUGO | S_IWUSR, 368 show_temp_hyst, set_temp_hyst); 369 370 /* 2 Fans */ 371 static ssize_t show_fan(struct device *dev, struct device_attribute *da, 372 char *buf) 373 { 374 struct sis5595_data *data = sis5595_update_device(dev); 375 struct sensor_device_attribute *attr = to_sensor_dev_attr(da); 376 int nr = attr->index; 377 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[nr], 378 DIV_FROM_REG(data->fan_div[nr]))); 379 } 380 381 static ssize_t show_fan_min(struct device *dev, struct device_attribute *da, 382 char *buf) 383 { 384 struct sis5595_data *data = sis5595_update_device(dev); 385 struct sensor_device_attribute *attr = to_sensor_dev_attr(da); 386 int nr = attr->index; 387 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[nr], 388 DIV_FROM_REG(data->fan_div[nr]))); 389 } 390 391 static ssize_t set_fan_min(struct device *dev, struct device_attribute *da, 392 const char *buf, size_t count) 393 { 394 struct sis5595_data *data = dev_get_drvdata(dev); 395 struct sensor_device_attribute *attr = to_sensor_dev_attr(da); 396 int nr = attr->index; 397 unsigned long val; 398 int err; 399 400 err = kstrtoul(buf, 10, &val); 401 if (err) 402 return err; 403 404 mutex_lock(&data->update_lock); 405 data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr])); 406 sis5595_write_value(data, SIS5595_REG_FAN_MIN(nr), data->fan_min[nr]); 407 mutex_unlock(&data->update_lock); 408 return count; 409 } 410 411 static ssize_t show_fan_div(struct device *dev, struct device_attribute *da, 412 char *buf) 413 { 414 struct sis5595_data *data = sis5595_update_device(dev); 415 struct sensor_device_attribute *attr = to_sensor_dev_attr(da); 416 int nr = attr->index; 417 return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr])); 418 } 419 420 /* 421 * Note: we save and restore the fan minimum here, because its value is 422 * determined in part by the fan divisor. This follows the principle of 423 * least surprise; the user doesn't expect the fan minimum to change just 424 * because the divisor changed. 425 */ 426 static ssize_t set_fan_div(struct device *dev, struct device_attribute *da, 427 const char *buf, size_t count) 428 { 429 struct sis5595_data *data = dev_get_drvdata(dev); 430 struct sensor_device_attribute *attr = to_sensor_dev_attr(da); 431 int nr = attr->index; 432 unsigned long min; 433 int reg; 434 unsigned long val; 435 int err; 436 437 err = kstrtoul(buf, 10, &val); 438 if (err) 439 return err; 440 441 mutex_lock(&data->update_lock); 442 min = FAN_FROM_REG(data->fan_min[nr], 443 DIV_FROM_REG(data->fan_div[nr])); 444 reg = sis5595_read_value(data, SIS5595_REG_FANDIV); 445 446 switch (val) { 447 case 1: 448 data->fan_div[nr] = 0; 449 break; 450 case 2: 451 data->fan_div[nr] = 1; 452 break; 453 case 4: 454 data->fan_div[nr] = 2; 455 break; 456 case 8: 457 data->fan_div[nr] = 3; 458 break; 459 default: 460 dev_err(dev, 461 "fan_div value %ld not supported. Choose one of 1, 2, 4 or 8!\n", 462 val); 463 mutex_unlock(&data->update_lock); 464 return -EINVAL; 465 } 466 467 switch (nr) { 468 case 0: 469 reg = (reg & 0xcf) | (data->fan_div[nr] << 4); 470 break; 471 case 1: 472 reg = (reg & 0x3f) | (data->fan_div[nr] << 6); 473 break; 474 } 475 sis5595_write_value(data, SIS5595_REG_FANDIV, reg); 476 data->fan_min[nr] = 477 FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr])); 478 sis5595_write_value(data, SIS5595_REG_FAN_MIN(nr), data->fan_min[nr]); 479 mutex_unlock(&data->update_lock); 480 return count; 481 } 482 483 #define show_fan_offset(offset) \ 484 static SENSOR_DEVICE_ATTR(fan##offset##_input, S_IRUGO, \ 485 show_fan, NULL, offset - 1); \ 486 static SENSOR_DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \ 487 show_fan_min, set_fan_min, offset - 1); \ 488 static SENSOR_DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR, \ 489 show_fan_div, set_fan_div, offset - 1); 490 491 show_fan_offset(1); 492 show_fan_offset(2); 493 494 /* Alarms */ 495 static ssize_t show_alarms(struct device *dev, struct device_attribute *attr, 496 char *buf) 497 { 498 struct sis5595_data *data = sis5595_update_device(dev); 499 return sprintf(buf, "%d\n", data->alarms); 500 } 501 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL); 502 503 static ssize_t show_alarm(struct device *dev, struct device_attribute *da, 504 char *buf) 505 { 506 struct sis5595_data *data = sis5595_update_device(dev); 507 int nr = to_sensor_dev_attr(da)->index; 508 return sprintf(buf, "%u\n", (data->alarms >> nr) & 1); 509 } 510 static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0); 511 static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 1); 512 static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 2); 513 static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 3); 514 static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 15); 515 static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 6); 516 static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 7); 517 static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 15); 518 519 static ssize_t show_name(struct device *dev, struct device_attribute *attr, 520 char *buf) 521 { 522 struct sis5595_data *data = dev_get_drvdata(dev); 523 return sprintf(buf, "%s\n", data->name); 524 } 525 static DEVICE_ATTR(name, S_IRUGO, show_name, NULL); 526 527 static struct attribute *sis5595_attributes[] = { 528 &sensor_dev_attr_in0_input.dev_attr.attr, 529 &sensor_dev_attr_in0_min.dev_attr.attr, 530 &sensor_dev_attr_in0_max.dev_attr.attr, 531 &sensor_dev_attr_in0_alarm.dev_attr.attr, 532 &sensor_dev_attr_in1_input.dev_attr.attr, 533 &sensor_dev_attr_in1_min.dev_attr.attr, 534 &sensor_dev_attr_in1_max.dev_attr.attr, 535 &sensor_dev_attr_in1_alarm.dev_attr.attr, 536 &sensor_dev_attr_in2_input.dev_attr.attr, 537 &sensor_dev_attr_in2_min.dev_attr.attr, 538 &sensor_dev_attr_in2_max.dev_attr.attr, 539 &sensor_dev_attr_in2_alarm.dev_attr.attr, 540 &sensor_dev_attr_in3_input.dev_attr.attr, 541 &sensor_dev_attr_in3_min.dev_attr.attr, 542 &sensor_dev_attr_in3_max.dev_attr.attr, 543 &sensor_dev_attr_in3_alarm.dev_attr.attr, 544 545 &sensor_dev_attr_fan1_input.dev_attr.attr, 546 &sensor_dev_attr_fan1_min.dev_attr.attr, 547 &sensor_dev_attr_fan1_div.dev_attr.attr, 548 &sensor_dev_attr_fan1_alarm.dev_attr.attr, 549 &sensor_dev_attr_fan2_input.dev_attr.attr, 550 &sensor_dev_attr_fan2_min.dev_attr.attr, 551 &sensor_dev_attr_fan2_div.dev_attr.attr, 552 &sensor_dev_attr_fan2_alarm.dev_attr.attr, 553 554 &dev_attr_alarms.attr, 555 &dev_attr_name.attr, 556 NULL 557 }; 558 559 static const struct attribute_group sis5595_group = { 560 .attrs = sis5595_attributes, 561 }; 562 563 static struct attribute *sis5595_attributes_in4[] = { 564 &sensor_dev_attr_in4_input.dev_attr.attr, 565 &sensor_dev_attr_in4_min.dev_attr.attr, 566 &sensor_dev_attr_in4_max.dev_attr.attr, 567 &sensor_dev_attr_in4_alarm.dev_attr.attr, 568 NULL 569 }; 570 571 static const struct attribute_group sis5595_group_in4 = { 572 .attrs = sis5595_attributes_in4, 573 }; 574 575 static struct attribute *sis5595_attributes_temp1[] = { 576 &dev_attr_temp1_input.attr, 577 &dev_attr_temp1_max.attr, 578 &dev_attr_temp1_max_hyst.attr, 579 &sensor_dev_attr_temp1_alarm.dev_attr.attr, 580 NULL 581 }; 582 583 static const struct attribute_group sis5595_group_temp1 = { 584 .attrs = sis5595_attributes_temp1, 585 }; 586 587 /* This is called when the module is loaded */ 588 static int sis5595_probe(struct platform_device *pdev) 589 { 590 int err = 0; 591 int i; 592 struct sis5595_data *data; 593 struct resource *res; 594 char val; 595 596 /* Reserve the ISA region */ 597 res = platform_get_resource(pdev, IORESOURCE_IO, 0); 598 if (!devm_request_region(&pdev->dev, res->start, SIS5595_EXTENT, 599 sis5595_driver.driver.name)) 600 return -EBUSY; 601 602 data = devm_kzalloc(&pdev->dev, sizeof(struct sis5595_data), 603 GFP_KERNEL); 604 if (!data) 605 return -ENOMEM; 606 607 mutex_init(&data->lock); 608 mutex_init(&data->update_lock); 609 data->addr = res->start; 610 data->name = "sis5595"; 611 platform_set_drvdata(pdev, data); 612 613 /* 614 * Check revision and pin registers to determine whether 4 or 5 voltages 615 */ 616 data->revision = s_bridge->revision; 617 /* 4 voltages, 1 temp */ 618 data->maxins = 3; 619 if (data->revision >= REV2MIN) { 620 pci_read_config_byte(s_bridge, SIS5595_PIN_REG, &val); 621 if (!(val & 0x80)) 622 /* 5 voltages, no temps */ 623 data->maxins = 4; 624 } 625 626 /* Initialize the SIS5595 chip */ 627 sis5595_init_device(data); 628 629 /* A few vars need to be filled upon startup */ 630 for (i = 0; i < 2; i++) { 631 data->fan_min[i] = sis5595_read_value(data, 632 SIS5595_REG_FAN_MIN(i)); 633 } 634 635 /* Register sysfs hooks */ 636 err = sysfs_create_group(&pdev->dev.kobj, &sis5595_group); 637 if (err) 638 return err; 639 if (data->maxins == 4) { 640 err = sysfs_create_group(&pdev->dev.kobj, &sis5595_group_in4); 641 if (err) 642 goto exit_remove_files; 643 } else { 644 err = sysfs_create_group(&pdev->dev.kobj, &sis5595_group_temp1); 645 if (err) 646 goto exit_remove_files; 647 } 648 649 data->hwmon_dev = hwmon_device_register(&pdev->dev); 650 if (IS_ERR(data->hwmon_dev)) { 651 err = PTR_ERR(data->hwmon_dev); 652 goto exit_remove_files; 653 } 654 655 return 0; 656 657 exit_remove_files: 658 sysfs_remove_group(&pdev->dev.kobj, &sis5595_group); 659 sysfs_remove_group(&pdev->dev.kobj, &sis5595_group_in4); 660 sysfs_remove_group(&pdev->dev.kobj, &sis5595_group_temp1); 661 return err; 662 } 663 664 static int sis5595_remove(struct platform_device *pdev) 665 { 666 struct sis5595_data *data = platform_get_drvdata(pdev); 667 668 hwmon_device_unregister(data->hwmon_dev); 669 sysfs_remove_group(&pdev->dev.kobj, &sis5595_group); 670 sysfs_remove_group(&pdev->dev.kobj, &sis5595_group_in4); 671 sysfs_remove_group(&pdev->dev.kobj, &sis5595_group_temp1); 672 673 return 0; 674 } 675 676 677 /* ISA access must be locked explicitly. */ 678 static int sis5595_read_value(struct sis5595_data *data, u8 reg) 679 { 680 int res; 681 682 mutex_lock(&data->lock); 683 outb_p(reg, data->addr + SIS5595_ADDR_REG_OFFSET); 684 res = inb_p(data->addr + SIS5595_DATA_REG_OFFSET); 685 mutex_unlock(&data->lock); 686 return res; 687 } 688 689 static void sis5595_write_value(struct sis5595_data *data, u8 reg, u8 value) 690 { 691 mutex_lock(&data->lock); 692 outb_p(reg, data->addr + SIS5595_ADDR_REG_OFFSET); 693 outb_p(value, data->addr + SIS5595_DATA_REG_OFFSET); 694 mutex_unlock(&data->lock); 695 } 696 697 /* Called when we have found a new SIS5595. */ 698 static void sis5595_init_device(struct sis5595_data *data) 699 { 700 u8 config = sis5595_read_value(data, SIS5595_REG_CONFIG); 701 if (!(config & 0x01)) 702 sis5595_write_value(data, SIS5595_REG_CONFIG, 703 (config & 0xf7) | 0x01); 704 } 705 706 static struct sis5595_data *sis5595_update_device(struct device *dev) 707 { 708 struct sis5595_data *data = dev_get_drvdata(dev); 709 int i; 710 711 mutex_lock(&data->update_lock); 712 713 if (time_after(jiffies, data->last_updated + HZ + HZ / 2) 714 || !data->valid) { 715 716 for (i = 0; i <= data->maxins; i++) { 717 data->in[i] = 718 sis5595_read_value(data, SIS5595_REG_IN(i)); 719 data->in_min[i] = 720 sis5595_read_value(data, 721 SIS5595_REG_IN_MIN(i)); 722 data->in_max[i] = 723 sis5595_read_value(data, 724 SIS5595_REG_IN_MAX(i)); 725 } 726 for (i = 0; i < 2; i++) { 727 data->fan[i] = 728 sis5595_read_value(data, SIS5595_REG_FAN(i)); 729 data->fan_min[i] = 730 sis5595_read_value(data, 731 SIS5595_REG_FAN_MIN(i)); 732 } 733 if (data->maxins == 3) { 734 data->temp = 735 sis5595_read_value(data, SIS5595_REG_TEMP); 736 data->temp_over = 737 sis5595_read_value(data, SIS5595_REG_TEMP_OVER); 738 data->temp_hyst = 739 sis5595_read_value(data, SIS5595_REG_TEMP_HYST); 740 } 741 i = sis5595_read_value(data, SIS5595_REG_FANDIV); 742 data->fan_div[0] = (i >> 4) & 0x03; 743 data->fan_div[1] = i >> 6; 744 data->alarms = 745 sis5595_read_value(data, SIS5595_REG_ALARM1) | 746 (sis5595_read_value(data, SIS5595_REG_ALARM2) << 8); 747 data->last_updated = jiffies; 748 data->valid = 1; 749 } 750 751 mutex_unlock(&data->update_lock); 752 753 return data; 754 } 755 756 static const struct pci_device_id sis5595_pci_ids[] = { 757 { PCI_DEVICE(PCI_VENDOR_ID_SI, PCI_DEVICE_ID_SI_503) }, 758 { 0, } 759 }; 760 761 MODULE_DEVICE_TABLE(pci, sis5595_pci_ids); 762 763 static int blacklist[] = { 764 PCI_DEVICE_ID_SI_540, 765 PCI_DEVICE_ID_SI_550, 766 PCI_DEVICE_ID_SI_630, 767 PCI_DEVICE_ID_SI_645, 768 PCI_DEVICE_ID_SI_730, 769 PCI_DEVICE_ID_SI_735, 770 PCI_DEVICE_ID_SI_5511, /* 771 * 5513 chip has the 0008 device but 772 * that ID shows up in other chips so we 773 * use the 5511 ID for recognition 774 */ 775 PCI_DEVICE_ID_SI_5597, 776 PCI_DEVICE_ID_SI_5598, 777 0 }; 778 779 static int sis5595_device_add(unsigned short address) 780 { 781 struct resource res = { 782 .start = address, 783 .end = address + SIS5595_EXTENT - 1, 784 .name = "sis5595", 785 .flags = IORESOURCE_IO, 786 }; 787 int err; 788 789 err = acpi_check_resource_conflict(&res); 790 if (err) 791 goto exit; 792 793 pdev = platform_device_alloc("sis5595", address); 794 if (!pdev) { 795 err = -ENOMEM; 796 pr_err("Device allocation failed\n"); 797 goto exit; 798 } 799 800 err = platform_device_add_resources(pdev, &res, 1); 801 if (err) { 802 pr_err("Device resource addition failed (%d)\n", err); 803 goto exit_device_put; 804 } 805 806 err = platform_device_add(pdev); 807 if (err) { 808 pr_err("Device addition failed (%d)\n", err); 809 goto exit_device_put; 810 } 811 812 return 0; 813 814 exit_device_put: 815 platform_device_put(pdev); 816 exit: 817 return err; 818 } 819 820 static int sis5595_pci_probe(struct pci_dev *dev, 821 const struct pci_device_id *id) 822 { 823 u16 address; 824 u8 enable; 825 int *i; 826 827 for (i = blacklist; *i != 0; i++) { 828 struct pci_dev *d; 829 d = pci_get_device(PCI_VENDOR_ID_SI, *i, NULL); 830 if (d) { 831 dev_err(&d->dev, 832 "Looked for SIS5595 but found unsupported device %.4x\n", 833 *i); 834 pci_dev_put(d); 835 return -ENODEV; 836 } 837 } 838 839 force_addr &= ~(SIS5595_EXTENT - 1); 840 if (force_addr) { 841 dev_warn(&dev->dev, "Forcing ISA address 0x%x\n", force_addr); 842 pci_write_config_word(dev, SIS5595_BASE_REG, force_addr); 843 } 844 845 if (PCIBIOS_SUCCESSFUL != 846 pci_read_config_word(dev, SIS5595_BASE_REG, &address)) { 847 dev_err(&dev->dev, "Failed to read ISA address\n"); 848 return -ENODEV; 849 } 850 851 address &= ~(SIS5595_EXTENT - 1); 852 if (!address) { 853 dev_err(&dev->dev, 854 "Base address not set - upgrade BIOS or use force_addr=0xaddr\n"); 855 return -ENODEV; 856 } 857 if (force_addr && address != force_addr) { 858 /* doesn't work for some chips? */ 859 dev_err(&dev->dev, "Failed to force ISA address\n"); 860 return -ENODEV; 861 } 862 863 if (PCIBIOS_SUCCESSFUL != 864 pci_read_config_byte(dev, SIS5595_ENABLE_REG, &enable)) { 865 dev_err(&dev->dev, "Failed to read enable register\n"); 866 return -ENODEV; 867 } 868 if (!(enable & 0x80)) { 869 if ((PCIBIOS_SUCCESSFUL != 870 pci_write_config_byte(dev, SIS5595_ENABLE_REG, 871 enable | 0x80)) 872 || (PCIBIOS_SUCCESSFUL != 873 pci_read_config_byte(dev, SIS5595_ENABLE_REG, &enable)) 874 || (!(enable & 0x80))) { 875 /* doesn't work for some chips! */ 876 dev_err(&dev->dev, "Failed to enable HWM device\n"); 877 return -ENODEV; 878 } 879 } 880 881 if (platform_driver_register(&sis5595_driver)) { 882 dev_dbg(&dev->dev, "Failed to register sis5595 driver\n"); 883 goto exit; 884 } 885 886 s_bridge = pci_dev_get(dev); 887 /* Sets global pdev as a side effect */ 888 if (sis5595_device_add(address)) 889 goto exit_unregister; 890 891 /* 892 * Always return failure here. This is to allow other drivers to bind 893 * to this pci device. We don't really want to have control over the 894 * pci device, we only wanted to read as few register values from it. 895 */ 896 return -ENODEV; 897 898 exit_unregister: 899 pci_dev_put(dev); 900 platform_driver_unregister(&sis5595_driver); 901 exit: 902 return -ENODEV; 903 } 904 905 static struct pci_driver sis5595_pci_driver = { 906 .name = "sis5595", 907 .id_table = sis5595_pci_ids, 908 .probe = sis5595_pci_probe, 909 }; 910 911 static int __init sm_sis5595_init(void) 912 { 913 return pci_register_driver(&sis5595_pci_driver); 914 } 915 916 static void __exit sm_sis5595_exit(void) 917 { 918 pci_unregister_driver(&sis5595_pci_driver); 919 if (s_bridge != NULL) { 920 platform_device_unregister(pdev); 921 platform_driver_unregister(&sis5595_driver); 922 pci_dev_put(s_bridge); 923 s_bridge = NULL; 924 } 925 } 926 927 MODULE_AUTHOR("Aurelien Jarno <aurelien@aurel32.net>"); 928 MODULE_DESCRIPTION("SiS 5595 Sensor device"); 929 MODULE_LICENSE("GPL"); 930 931 module_init(sm_sis5595_init); 932 module_exit(sm_sis5595_exit); 933