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 = 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(int 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 .owner = THIS_MODULE, 219 .name = "sis5595", 220 }, 221 .probe = sis5595_probe, 222 .remove = sis5595_remove, 223 }; 224 225 /* 4 Voltages */ 226 static ssize_t show_in(struct device *dev, struct device_attribute *da, 227 char *buf) 228 { 229 struct sis5595_data *data = sis5595_update_device(dev); 230 struct sensor_device_attribute *attr = to_sensor_dev_attr(da); 231 int nr = attr->index; 232 return sprintf(buf, "%d\n", IN_FROM_REG(data->in[nr])); 233 } 234 235 static ssize_t show_in_min(struct device *dev, struct device_attribute *da, 236 char *buf) 237 { 238 struct sis5595_data *data = sis5595_update_device(dev); 239 struct sensor_device_attribute *attr = to_sensor_dev_attr(da); 240 int nr = attr->index; 241 return sprintf(buf, "%d\n", IN_FROM_REG(data->in_min[nr])); 242 } 243 244 static ssize_t show_in_max(struct device *dev, struct device_attribute *da, 245 char *buf) 246 { 247 struct sis5595_data *data = sis5595_update_device(dev); 248 struct sensor_device_attribute *attr = to_sensor_dev_attr(da); 249 int nr = attr->index; 250 return sprintf(buf, "%d\n", IN_FROM_REG(data->in_max[nr])); 251 } 252 253 static ssize_t set_in_min(struct device *dev, struct device_attribute *da, 254 const char *buf, size_t count) 255 { 256 struct sis5595_data *data = dev_get_drvdata(dev); 257 struct sensor_device_attribute *attr = to_sensor_dev_attr(da); 258 int nr = attr->index; 259 unsigned long val; 260 int err; 261 262 err = kstrtoul(buf, 10, &val); 263 if (err) 264 return err; 265 266 mutex_lock(&data->update_lock); 267 data->in_min[nr] = IN_TO_REG(val); 268 sis5595_write_value(data, SIS5595_REG_IN_MIN(nr), data->in_min[nr]); 269 mutex_unlock(&data->update_lock); 270 return count; 271 } 272 273 static ssize_t set_in_max(struct device *dev, struct device_attribute *da, 274 const char *buf, size_t count) 275 { 276 struct sis5595_data *data = dev_get_drvdata(dev); 277 struct sensor_device_attribute *attr = to_sensor_dev_attr(da); 278 int nr = attr->index; 279 unsigned long val; 280 int err; 281 282 err = kstrtoul(buf, 10, &val); 283 if (err) 284 return err; 285 286 mutex_lock(&data->update_lock); 287 data->in_max[nr] = IN_TO_REG(val); 288 sis5595_write_value(data, SIS5595_REG_IN_MAX(nr), data->in_max[nr]); 289 mutex_unlock(&data->update_lock); 290 return count; 291 } 292 293 #define show_in_offset(offset) \ 294 static SENSOR_DEVICE_ATTR(in##offset##_input, S_IRUGO, \ 295 show_in, NULL, offset); \ 296 static SENSOR_DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \ 297 show_in_min, set_in_min, offset); \ 298 static SENSOR_DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \ 299 show_in_max, set_in_max, offset); 300 301 show_in_offset(0); 302 show_in_offset(1); 303 show_in_offset(2); 304 show_in_offset(3); 305 show_in_offset(4); 306 307 /* Temperature */ 308 static ssize_t show_temp(struct device *dev, struct device_attribute *attr, 309 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 show_temp_over(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 set_temp_over(struct device *dev, struct device_attribute *attr, 323 const char *buf, size_t count) 324 { 325 struct sis5595_data *data = dev_get_drvdata(dev); 326 long val; 327 int err; 328 329 err = kstrtol(buf, 10, &val); 330 if (err) 331 return err; 332 333 mutex_lock(&data->update_lock); 334 data->temp_over = TEMP_TO_REG(val); 335 sis5595_write_value(data, SIS5595_REG_TEMP_OVER, data->temp_over); 336 mutex_unlock(&data->update_lock); 337 return count; 338 } 339 340 static ssize_t show_temp_hyst(struct device *dev, struct device_attribute *attr, 341 char *buf) 342 { 343 struct sis5595_data *data = sis5595_update_device(dev); 344 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_hyst)); 345 } 346 347 static ssize_t set_temp_hyst(struct device *dev, struct device_attribute *attr, 348 const char *buf, size_t count) 349 { 350 struct sis5595_data *data = dev_get_drvdata(dev); 351 long val; 352 int err; 353 354 err = kstrtol(buf, 10, &val); 355 if (err) 356 return err; 357 358 mutex_lock(&data->update_lock); 359 data->temp_hyst = TEMP_TO_REG(val); 360 sis5595_write_value(data, SIS5595_REG_TEMP_HYST, data->temp_hyst); 361 mutex_unlock(&data->update_lock); 362 return count; 363 } 364 365 static DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL); 366 static DEVICE_ATTR(temp1_max, S_IRUGO | S_IWUSR, 367 show_temp_over, set_temp_over); 368 static DEVICE_ATTR(temp1_max_hyst, S_IRUGO | S_IWUSR, 369 show_temp_hyst, set_temp_hyst); 370 371 /* 2 Fans */ 372 static ssize_t show_fan(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 show_fan_min(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 set_fan_min(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 show_fan_div(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 set_fan_div(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 #define show_fan_offset(offset) \ 485 static SENSOR_DEVICE_ATTR(fan##offset##_input, S_IRUGO, \ 486 show_fan, NULL, offset - 1); \ 487 static SENSOR_DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \ 488 show_fan_min, set_fan_min, offset - 1); \ 489 static SENSOR_DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR, \ 490 show_fan_div, set_fan_div, offset - 1); 491 492 show_fan_offset(1); 493 show_fan_offset(2); 494 495 /* Alarms */ 496 static ssize_t show_alarms(struct device *dev, struct device_attribute *attr, 497 char *buf) 498 { 499 struct sis5595_data *data = sis5595_update_device(dev); 500 return sprintf(buf, "%d\n", data->alarms); 501 } 502 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL); 503 504 static ssize_t show_alarm(struct device *dev, struct device_attribute *da, 505 char *buf) 506 { 507 struct sis5595_data *data = sis5595_update_device(dev); 508 int nr = to_sensor_dev_attr(da)->index; 509 return sprintf(buf, "%u\n", (data->alarms >> nr) & 1); 510 } 511 static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0); 512 static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 1); 513 static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 2); 514 static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 3); 515 static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 15); 516 static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 6); 517 static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 7); 518 static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 15); 519 520 static ssize_t show_name(struct device *dev, struct device_attribute *attr, 521 char *buf) 522 { 523 struct sis5595_data *data = dev_get_drvdata(dev); 524 return sprintf(buf, "%s\n", data->name); 525 } 526 static DEVICE_ATTR(name, S_IRUGO, show_name, NULL); 527 528 static struct attribute *sis5595_attributes[] = { 529 &sensor_dev_attr_in0_input.dev_attr.attr, 530 &sensor_dev_attr_in0_min.dev_attr.attr, 531 &sensor_dev_attr_in0_max.dev_attr.attr, 532 &sensor_dev_attr_in0_alarm.dev_attr.attr, 533 &sensor_dev_attr_in1_input.dev_attr.attr, 534 &sensor_dev_attr_in1_min.dev_attr.attr, 535 &sensor_dev_attr_in1_max.dev_attr.attr, 536 &sensor_dev_attr_in1_alarm.dev_attr.attr, 537 &sensor_dev_attr_in2_input.dev_attr.attr, 538 &sensor_dev_attr_in2_min.dev_attr.attr, 539 &sensor_dev_attr_in2_max.dev_attr.attr, 540 &sensor_dev_attr_in2_alarm.dev_attr.attr, 541 &sensor_dev_attr_in3_input.dev_attr.attr, 542 &sensor_dev_attr_in3_min.dev_attr.attr, 543 &sensor_dev_attr_in3_max.dev_attr.attr, 544 &sensor_dev_attr_in3_alarm.dev_attr.attr, 545 546 &sensor_dev_attr_fan1_input.dev_attr.attr, 547 &sensor_dev_attr_fan1_min.dev_attr.attr, 548 &sensor_dev_attr_fan1_div.dev_attr.attr, 549 &sensor_dev_attr_fan1_alarm.dev_attr.attr, 550 &sensor_dev_attr_fan2_input.dev_attr.attr, 551 &sensor_dev_attr_fan2_min.dev_attr.attr, 552 &sensor_dev_attr_fan2_div.dev_attr.attr, 553 &sensor_dev_attr_fan2_alarm.dev_attr.attr, 554 555 &dev_attr_alarms.attr, 556 &dev_attr_name.attr, 557 NULL 558 }; 559 560 static const struct attribute_group sis5595_group = { 561 .attrs = sis5595_attributes, 562 }; 563 564 static struct attribute *sis5595_attributes_in4[] = { 565 &sensor_dev_attr_in4_input.dev_attr.attr, 566 &sensor_dev_attr_in4_min.dev_attr.attr, 567 &sensor_dev_attr_in4_max.dev_attr.attr, 568 &sensor_dev_attr_in4_alarm.dev_attr.attr, 569 NULL 570 }; 571 572 static const struct attribute_group sis5595_group_in4 = { 573 .attrs = sis5595_attributes_in4, 574 }; 575 576 static struct attribute *sis5595_attributes_temp1[] = { 577 &dev_attr_temp1_input.attr, 578 &dev_attr_temp1_max.attr, 579 &dev_attr_temp1_max_hyst.attr, 580 &sensor_dev_attr_temp1_alarm.dev_attr.attr, 581 NULL 582 }; 583 584 static const struct attribute_group sis5595_group_temp1 = { 585 .attrs = sis5595_attributes_temp1, 586 }; 587 588 /* This is called when the module is loaded */ 589 static int sis5595_probe(struct platform_device *pdev) 590 { 591 int err = 0; 592 int i; 593 struct sis5595_data *data; 594 struct resource *res; 595 char val; 596 597 /* Reserve the ISA region */ 598 res = platform_get_resource(pdev, IORESOURCE_IO, 0); 599 if (!devm_request_region(&pdev->dev, res->start, SIS5595_EXTENT, 600 sis5595_driver.driver.name)) 601 return -EBUSY; 602 603 data = devm_kzalloc(&pdev->dev, sizeof(struct sis5595_data), 604 GFP_KERNEL); 605 if (!data) 606 return -ENOMEM; 607 608 mutex_init(&data->lock); 609 mutex_init(&data->update_lock); 610 data->addr = res->start; 611 data->name = "sis5595"; 612 platform_set_drvdata(pdev, data); 613 614 /* 615 * Check revision and pin registers to determine whether 4 or 5 voltages 616 */ 617 data->revision = s_bridge->revision; 618 /* 4 voltages, 1 temp */ 619 data->maxins = 3; 620 if (data->revision >= REV2MIN) { 621 pci_read_config_byte(s_bridge, SIS5595_PIN_REG, &val); 622 if (!(val & 0x80)) 623 /* 5 voltages, no temps */ 624 data->maxins = 4; 625 } 626 627 /* Initialize the SIS5595 chip */ 628 sis5595_init_device(data); 629 630 /* A few vars need to be filled upon startup */ 631 for (i = 0; i < 2; i++) { 632 data->fan_min[i] = sis5595_read_value(data, 633 SIS5595_REG_FAN_MIN(i)); 634 } 635 636 /* Register sysfs hooks */ 637 err = sysfs_create_group(&pdev->dev.kobj, &sis5595_group); 638 if (err) 639 return err; 640 if (data->maxins == 4) { 641 err = sysfs_create_group(&pdev->dev.kobj, &sis5595_group_in4); 642 if (err) 643 goto exit_remove_files; 644 } else { 645 err = sysfs_create_group(&pdev->dev.kobj, &sis5595_group_temp1); 646 if (err) 647 goto exit_remove_files; 648 } 649 650 data->hwmon_dev = hwmon_device_register(&pdev->dev); 651 if (IS_ERR(data->hwmon_dev)) { 652 err = PTR_ERR(data->hwmon_dev); 653 goto exit_remove_files; 654 } 655 656 return 0; 657 658 exit_remove_files: 659 sysfs_remove_group(&pdev->dev.kobj, &sis5595_group); 660 sysfs_remove_group(&pdev->dev.kobj, &sis5595_group_in4); 661 sysfs_remove_group(&pdev->dev.kobj, &sis5595_group_temp1); 662 return err; 663 } 664 665 static int sis5595_remove(struct platform_device *pdev) 666 { 667 struct sis5595_data *data = platform_get_drvdata(pdev); 668 669 hwmon_device_unregister(data->hwmon_dev); 670 sysfs_remove_group(&pdev->dev.kobj, &sis5595_group); 671 sysfs_remove_group(&pdev->dev.kobj, &sis5595_group_in4); 672 sysfs_remove_group(&pdev->dev.kobj, &sis5595_group_temp1); 673 674 return 0; 675 } 676 677 678 /* ISA access must be locked explicitly. */ 679 static int sis5595_read_value(struct sis5595_data *data, u8 reg) 680 { 681 int res; 682 683 mutex_lock(&data->lock); 684 outb_p(reg, data->addr + SIS5595_ADDR_REG_OFFSET); 685 res = inb_p(data->addr + SIS5595_DATA_REG_OFFSET); 686 mutex_unlock(&data->lock); 687 return res; 688 } 689 690 static void sis5595_write_value(struct sis5595_data *data, u8 reg, u8 value) 691 { 692 mutex_lock(&data->lock); 693 outb_p(reg, data->addr + SIS5595_ADDR_REG_OFFSET); 694 outb_p(value, data->addr + SIS5595_DATA_REG_OFFSET); 695 mutex_unlock(&data->lock); 696 } 697 698 /* Called when we have found a new SIS5595. */ 699 static void sis5595_init_device(struct sis5595_data *data) 700 { 701 u8 config = sis5595_read_value(data, SIS5595_REG_CONFIG); 702 if (!(config & 0x01)) 703 sis5595_write_value(data, SIS5595_REG_CONFIG, 704 (config & 0xf7) | 0x01); 705 } 706 707 static struct sis5595_data *sis5595_update_device(struct device *dev) 708 { 709 struct sis5595_data *data = dev_get_drvdata(dev); 710 int i; 711 712 mutex_lock(&data->update_lock); 713 714 if (time_after(jiffies, data->last_updated + HZ + HZ / 2) 715 || !data->valid) { 716 717 for (i = 0; i <= data->maxins; i++) { 718 data->in[i] = 719 sis5595_read_value(data, SIS5595_REG_IN(i)); 720 data->in_min[i] = 721 sis5595_read_value(data, 722 SIS5595_REG_IN_MIN(i)); 723 data->in_max[i] = 724 sis5595_read_value(data, 725 SIS5595_REG_IN_MAX(i)); 726 } 727 for (i = 0; i < 2; i++) { 728 data->fan[i] = 729 sis5595_read_value(data, SIS5595_REG_FAN(i)); 730 data->fan_min[i] = 731 sis5595_read_value(data, 732 SIS5595_REG_FAN_MIN(i)); 733 } 734 if (data->maxins == 3) { 735 data->temp = 736 sis5595_read_value(data, SIS5595_REG_TEMP); 737 data->temp_over = 738 sis5595_read_value(data, SIS5595_REG_TEMP_OVER); 739 data->temp_hyst = 740 sis5595_read_value(data, SIS5595_REG_TEMP_HYST); 741 } 742 i = sis5595_read_value(data, SIS5595_REG_FANDIV); 743 data->fan_div[0] = (i >> 4) & 0x03; 744 data->fan_div[1] = i >> 6; 745 data->alarms = 746 sis5595_read_value(data, SIS5595_REG_ALARM1) | 747 (sis5595_read_value(data, SIS5595_REG_ALARM2) << 8); 748 data->last_updated = jiffies; 749 data->valid = 1; 750 } 751 752 mutex_unlock(&data->update_lock); 753 754 return data; 755 } 756 757 static DEFINE_PCI_DEVICE_TABLE(sis5595_pci_ids) = { 758 { PCI_DEVICE(PCI_VENDOR_ID_SI, PCI_DEVICE_ID_SI_503) }, 759 { 0, } 760 }; 761 762 MODULE_DEVICE_TABLE(pci, sis5595_pci_ids); 763 764 static int blacklist[] = { 765 PCI_DEVICE_ID_SI_540, 766 PCI_DEVICE_ID_SI_550, 767 PCI_DEVICE_ID_SI_630, 768 PCI_DEVICE_ID_SI_645, 769 PCI_DEVICE_ID_SI_730, 770 PCI_DEVICE_ID_SI_735, 771 PCI_DEVICE_ID_SI_5511, /* 772 * 5513 chip has the 0008 device but 773 * that ID shows up in other chips so we 774 * use the 5511 ID for recognition 775 */ 776 PCI_DEVICE_ID_SI_5597, 777 PCI_DEVICE_ID_SI_5598, 778 0 }; 779 780 static int sis5595_device_add(unsigned short address) 781 { 782 struct resource res = { 783 .start = address, 784 .end = address + SIS5595_EXTENT - 1, 785 .name = "sis5595", 786 .flags = IORESOURCE_IO, 787 }; 788 int err; 789 790 err = acpi_check_resource_conflict(&res); 791 if (err) 792 goto exit; 793 794 pdev = platform_device_alloc("sis5595", address); 795 if (!pdev) { 796 err = -ENOMEM; 797 pr_err("Device allocation failed\n"); 798 goto exit; 799 } 800 801 err = platform_device_add_resources(pdev, &res, 1); 802 if (err) { 803 pr_err("Device resource addition failed (%d)\n", err); 804 goto exit_device_put; 805 } 806 807 err = platform_device_add(pdev); 808 if (err) { 809 pr_err("Device addition failed (%d)\n", err); 810 goto exit_device_put; 811 } 812 813 return 0; 814 815 exit_device_put: 816 platform_device_put(pdev); 817 exit: 818 return err; 819 } 820 821 static int sis5595_pci_probe(struct pci_dev *dev, 822 const struct pci_device_id *id) 823 { 824 u16 address; 825 u8 enable; 826 int *i; 827 828 for (i = blacklist; *i != 0; i++) { 829 struct pci_dev *d; 830 d = pci_get_device(PCI_VENDOR_ID_SI, *i, NULL); 831 if (d) { 832 dev_err(&d->dev, 833 "Looked for SIS5595 but found unsupported device %.4x\n", 834 *i); 835 pci_dev_put(d); 836 return -ENODEV; 837 } 838 } 839 840 force_addr &= ~(SIS5595_EXTENT - 1); 841 if (force_addr) { 842 dev_warn(&dev->dev, "Forcing ISA address 0x%x\n", force_addr); 843 pci_write_config_word(dev, SIS5595_BASE_REG, force_addr); 844 } 845 846 if (PCIBIOS_SUCCESSFUL != 847 pci_read_config_word(dev, SIS5595_BASE_REG, &address)) { 848 dev_err(&dev->dev, "Failed to read ISA address\n"); 849 return -ENODEV; 850 } 851 852 address &= ~(SIS5595_EXTENT - 1); 853 if (!address) { 854 dev_err(&dev->dev, 855 "Base address not set - upgrade BIOS or use force_addr=0xaddr\n"); 856 return -ENODEV; 857 } 858 if (force_addr && address != force_addr) { 859 /* doesn't work for some chips? */ 860 dev_err(&dev->dev, "Failed to force ISA address\n"); 861 return -ENODEV; 862 } 863 864 if (PCIBIOS_SUCCESSFUL != 865 pci_read_config_byte(dev, SIS5595_ENABLE_REG, &enable)) { 866 dev_err(&dev->dev, "Failed to read enable register\n"); 867 return -ENODEV; 868 } 869 if (!(enable & 0x80)) { 870 if ((PCIBIOS_SUCCESSFUL != 871 pci_write_config_byte(dev, SIS5595_ENABLE_REG, 872 enable | 0x80)) 873 || (PCIBIOS_SUCCESSFUL != 874 pci_read_config_byte(dev, SIS5595_ENABLE_REG, &enable)) 875 || (!(enable & 0x80))) { 876 /* doesn't work for some chips! */ 877 dev_err(&dev->dev, "Failed to enable HWM device\n"); 878 return -ENODEV; 879 } 880 } 881 882 if (platform_driver_register(&sis5595_driver)) { 883 dev_dbg(&dev->dev, "Failed to register sis5595 driver\n"); 884 goto exit; 885 } 886 887 s_bridge = pci_dev_get(dev); 888 /* Sets global pdev as a side effect */ 889 if (sis5595_device_add(address)) 890 goto exit_unregister; 891 892 /* 893 * Always return failure here. This is to allow other drivers to bind 894 * to this pci device. We don't really want to have control over the 895 * pci device, we only wanted to read as few register values from it. 896 */ 897 return -ENODEV; 898 899 exit_unregister: 900 pci_dev_put(dev); 901 platform_driver_unregister(&sis5595_driver); 902 exit: 903 return -ENODEV; 904 } 905 906 static struct pci_driver sis5595_pci_driver = { 907 .name = "sis5595", 908 .id_table = sis5595_pci_ids, 909 .probe = sis5595_pci_probe, 910 }; 911 912 static int __init sm_sis5595_init(void) 913 { 914 return pci_register_driver(&sis5595_pci_driver); 915 } 916 917 static void __exit sm_sis5595_exit(void) 918 { 919 pci_unregister_driver(&sis5595_pci_driver); 920 if (s_bridge != NULL) { 921 platform_device_unregister(pdev); 922 platform_driver_unregister(&sis5595_driver); 923 pci_dev_put(s_bridge); 924 s_bridge = NULL; 925 } 926 } 927 928 MODULE_AUTHOR("Aurelien Jarno <aurelien@aurel32.net>"); 929 MODULE_DESCRIPTION("SiS 5595 Sensor device"); 930 MODULE_LICENSE("GPL"); 931 932 module_init(sm_sis5595_init); 933 module_exit(sm_sis5595_exit); 934