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1// SPDX-License-Identifier: GPL-2.0-or-later2/*3 * vt8231.c - Part of lm_sensors, Linux kernel modules4 * for hardware monitoring5 *6 * Copyright (c) 2005 Roger Lucas <vt8231@hiddenengine.co.uk>7 * Copyright (c) 2002 Mark D. Studebaker <mdsxyz123@yahoo.com>8 * Aaron M. Marsh <amarsh@sdf.lonestar.org>9 */10 11/*12 * Supports VIA VT8231 South Bridge embedded sensors13 */14 15#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt16 17#include <linux/module.h>18#include <linux/init.h>19#include <linux/slab.h>20#include <linux/pci.h>21#include <linux/jiffies.h>22#include <linux/platform_device.h>23#include <linux/hwmon.h>24#include <linux/hwmon-sysfs.h>25#include <linux/err.h>26#include <linux/mutex.h>27#include <linux/acpi.h>28#include <linux/io.h>29 30static int force_addr;31module_param(force_addr, int, 0);32MODULE_PARM_DESC(force_addr, "Initialize the base address of the sensors");33 34static struct platform_device *pdev;35 36#define VT8231_EXTENT 0x8037#define VT8231_BASE_REG 0x7038#define VT8231_ENABLE_REG 0x7439 40#define DRIVER_NAME "vt8231"41 42/*43 * The VT8231 registers44 *45 * The reset value for the input channel configuration is used (Reg 0x4A=0x07)46 * which sets the selected inputs marked with '*' below if multiple options are47 * possible:48 *49 * Voltage Mode Temperature Mode50 * Sensor Linux Id Linux Id VIA Id51 * -------- -------- -------- ------52 * CPU Diode N/A temp1 053 * UIC1 in0 temp2 * 154 * UIC2 in1 * temp3 255 * UIC3 in2 * temp4 356 * UIC4 in3 * temp5 457 * UIC5 in4 * temp6 558 * 3.3V in5 N/A59 *60 * Note that the BIOS may set the configuration register to a different value61 * to match the motherboard configuration.62 */63 64/* fans numbered 0-1 */65#define VT8231_REG_FAN_MIN(nr) (0x3b + (nr))66#define VT8231_REG_FAN(nr) (0x29 + (nr))67 68/* Voltage inputs numbered 0-5 */69 70static const u8 regvolt[] = { 0x21, 0x22, 0x23, 0x24, 0x25, 0x26 };71static const u8 regvoltmax[] = { 0x3d, 0x2b, 0x2d, 0x2f, 0x31, 0x33 };72static const u8 regvoltmin[] = { 0x3e, 0x2c, 0x2e, 0x30, 0x32, 0x34 };73 74/*75 * Temperatures are numbered 1-6 according to the Linux kernel specification.76 *77 * In the VIA datasheet, however, the temperatures are numbered from zero.78 * Since it is important that this driver can easily be compared to the VIA79 * datasheet, we will use the VIA numbering within this driver and map the80 * kernel sysfs device name to the VIA number in the sysfs callback.81 */82 83#define VT8231_REG_TEMP_LOW01 0x4984#define VT8231_REG_TEMP_LOW25 0x4d85 86static const u8 regtemp[] = { 0x1f, 0x21, 0x22, 0x23, 0x24, 0x25 };87static const u8 regtempmax[] = { 0x39, 0x3d, 0x2b, 0x2d, 0x2f, 0x31 };88static const u8 regtempmin[] = { 0x3a, 0x3e, 0x2c, 0x2e, 0x30, 0x32 };89 90#define TEMP_FROM_REG(reg) (((253 * 4 - (reg)) * 550 + 105) / 210)91#define TEMP_MAXMIN_FROM_REG(reg) (((253 - (reg)) * 2200 + 105) / 210)92#define TEMP_MAXMIN_TO_REG(val) (253 - ((val) * 210 + 1100) / 2200)93 94#define VT8231_REG_CONFIG 0x4095#define VT8231_REG_ALARM1 0x4196#define VT8231_REG_ALARM2 0x4297#define VT8231_REG_FANDIV 0x4798#define VT8231_REG_UCH_CONFIG 0x4a99#define VT8231_REG_TEMP1_CONFIG 0x4b100#define VT8231_REG_TEMP2_CONFIG 0x4c101 102/*103 * temps 0-5 as numbered in VIA datasheet - see later for mapping to Linux104 * numbering105 */106#define ISTEMP(i, ch_config) ((i) == 0 ? 1 : \107 ((ch_config) >> ((i)+1)) & 0x01)108/* voltages 0-5 */109#define ISVOLT(i, ch_config) ((i) == 5 ? 1 : \110 !(((ch_config) >> ((i)+2)) & 0x01))111 112#define DIV_FROM_REG(val) (1 << (val))113 114/*115 * NB The values returned here are NOT temperatures. The calibration curves116 * for the thermistor curves are board-specific and must go in the117 * sensors.conf file. Temperature sensors are actually ten bits, but the118 * VIA datasheet only considers the 8 MSBs obtained from the regtemp[]119 * register. The temperature value returned should have a magnitude of 3,120 * so we use the VIA scaling as the "true" scaling and use the remaining 2121 * LSBs as fractional precision.122 *123 * All the on-chip hardware temperature comparisons for the alarms are only124 * 8-bits wide, and compare against the 8 MSBs of the temperature. The bits125 * in the registers VT8231_REG_TEMP_LOW01 and VT8231_REG_TEMP_LOW25 are126 * ignored.127 */128 129/*130 ****** FAN RPM CONVERSIONS ********131 * This chip saturates back at 0, not at 255 like many the other chips.132 * So, 0 means 0 RPM133 */134static inline u8 FAN_TO_REG(long rpm, int div)135{136 if (rpm <= 0 || rpm > 1310720)137 return 0;138 return clamp_val(1310720 / (rpm * div), 1, 255);139}140 141#define FAN_FROM_REG(val, div) ((val) == 0 ? 0 : 1310720 / ((val) * (div)))142 143struct vt8231_data {144 unsigned short addr;145 const char *name;146 147 struct mutex update_lock;148 struct device *hwmon_dev;149 bool valid; /* true if following fields are valid */150 unsigned long last_updated; /* In jiffies */151 152 u8 in[6]; /* Register value */153 u8 in_max[6]; /* Register value */154 u8 in_min[6]; /* Register value */155 u16 temp[6]; /* Register value 10 bit, right aligned */156 u8 temp_max[6]; /* Register value */157 u8 temp_min[6]; /* Register value */158 u8 fan[2]; /* Register value */159 u8 fan_min[2]; /* Register value */160 u8 fan_div[2]; /* Register encoding, shifted right */161 u16 alarms; /* Register encoding */162 u8 uch_config;163};164 165static struct pci_dev *s_bridge;166 167static inline int vt8231_read_value(struct vt8231_data *data, u8 reg)168{169 return inb_p(data->addr + reg);170}171 172static inline void vt8231_write_value(struct vt8231_data *data, u8 reg,173 u8 value)174{175 outb_p(value, data->addr + reg);176}177 178static struct vt8231_data *vt8231_update_device(struct device *dev)179{180 struct vt8231_data *data = dev_get_drvdata(dev);181 int i;182 u16 low;183 184 mutex_lock(&data->update_lock);185 186 if (time_after(jiffies, data->last_updated + HZ + HZ / 2)187 || !data->valid) {188 for (i = 0; i < 6; i++) {189 if (ISVOLT(i, data->uch_config)) {190 data->in[i] = vt8231_read_value(data,191 regvolt[i]);192 data->in_min[i] = vt8231_read_value(data,193 regvoltmin[i]);194 data->in_max[i] = vt8231_read_value(data,195 regvoltmax[i]);196 }197 }198 for (i = 0; i < 2; i++) {199 data->fan[i] = vt8231_read_value(data,200 VT8231_REG_FAN(i));201 data->fan_min[i] = vt8231_read_value(data,202 VT8231_REG_FAN_MIN(i));203 }204 205 low = vt8231_read_value(data, VT8231_REG_TEMP_LOW01);206 low = (low >> 6) | ((low & 0x30) >> 2)207 | (vt8231_read_value(data, VT8231_REG_TEMP_LOW25) << 4);208 for (i = 0; i < 6; i++) {209 if (ISTEMP(i, data->uch_config)) {210 data->temp[i] = (vt8231_read_value(data,211 regtemp[i]) << 2)212 | ((low >> (2 * i)) & 0x03);213 data->temp_max[i] = vt8231_read_value(data,214 regtempmax[i]);215 data->temp_min[i] = vt8231_read_value(data,216 regtempmin[i]);217 }218 }219 220 i = vt8231_read_value(data, VT8231_REG_FANDIV);221 data->fan_div[0] = (i >> 4) & 0x03;222 data->fan_div[1] = i >> 6;223 data->alarms = vt8231_read_value(data, VT8231_REG_ALARM1) |224 (vt8231_read_value(data, VT8231_REG_ALARM2) << 8);225 226 /* Set alarm flags correctly */227 if (!data->fan[0] && data->fan_min[0])228 data->alarms |= 0x40;229 else if (data->fan[0] && !data->fan_min[0])230 data->alarms &= ~0x40;231 232 if (!data->fan[1] && data->fan_min[1])233 data->alarms |= 0x80;234 else if (data->fan[1] && !data->fan_min[1])235 data->alarms &= ~0x80;236 237 data->last_updated = jiffies;238 data->valid = true;239 }240 241 mutex_unlock(&data->update_lock);242 243 return data;244}245 246/* following are the sysfs callback functions */247static ssize_t in_show(struct device *dev, struct device_attribute *attr,248 char *buf)249{250 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);251 int nr = sensor_attr->index;252 struct vt8231_data *data = vt8231_update_device(dev);253 254 return sprintf(buf, "%d\n", ((data->in[nr] - 3) * 10000) / 958);255}256 257static ssize_t in_min_show(struct device *dev, struct device_attribute *attr,258 char *buf)259{260 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);261 int nr = sensor_attr->index;262 struct vt8231_data *data = vt8231_update_device(dev);263 264 return sprintf(buf, "%d\n", ((data->in_min[nr] - 3) * 10000) / 958);265}266 267static ssize_t in_max_show(struct device *dev, struct device_attribute *attr,268 char *buf)269{270 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);271 int nr = sensor_attr->index;272 struct vt8231_data *data = vt8231_update_device(dev);273 274 return sprintf(buf, "%d\n", (((data->in_max[nr] - 3) * 10000) / 958));275}276 277static ssize_t in_min_store(struct device *dev, struct device_attribute *attr,278 const char *buf, size_t count)279{280 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);281 int nr = sensor_attr->index;282 struct vt8231_data *data = dev_get_drvdata(dev);283 unsigned long val;284 int err;285 286 err = kstrtoul(buf, 10, &val);287 if (err)288 return err;289 290 mutex_lock(&data->update_lock);291 data->in_min[nr] = clamp_val(((val * 958) / 10000) + 3, 0, 255);292 vt8231_write_value(data, regvoltmin[nr], data->in_min[nr]);293 mutex_unlock(&data->update_lock);294 return count;295}296 297static ssize_t in_max_store(struct device *dev, struct device_attribute *attr,298 const char *buf, size_t count)299{300 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);301 int nr = sensor_attr->index;302 struct vt8231_data *data = dev_get_drvdata(dev);303 unsigned long val;304 int err;305 306 err = kstrtoul(buf, 10, &val);307 if (err)308 return err;309 310 mutex_lock(&data->update_lock);311 data->in_max[nr] = clamp_val(((val * 958) / 10000) + 3, 0, 255);312 vt8231_write_value(data, regvoltmax[nr], data->in_max[nr]);313 mutex_unlock(&data->update_lock);314 return count;315}316 317/* Special case for input 5 as this has 3.3V scaling built into the chip */318static ssize_t in5_input_show(struct device *dev,319 struct device_attribute *attr, char *buf)320{321 struct vt8231_data *data = vt8231_update_device(dev);322 323 return sprintf(buf, "%d\n",324 (((data->in[5] - 3) * 10000 * 54) / (958 * 34)));325}326 327static ssize_t in5_min_show(struct device *dev, struct device_attribute *attr,328 char *buf)329{330 struct vt8231_data *data = vt8231_update_device(dev);331 332 return sprintf(buf, "%d\n",333 (((data->in_min[5] - 3) * 10000 * 54) / (958 * 34)));334}335 336static ssize_t in5_max_show(struct device *dev, struct device_attribute *attr,337 char *buf)338{339 struct vt8231_data *data = vt8231_update_device(dev);340 341 return sprintf(buf, "%d\n",342 (((data->in_max[5] - 3) * 10000 * 54) / (958 * 34)));343}344 345static ssize_t in5_min_store(struct device *dev,346 struct device_attribute *attr, const char *buf,347 size_t count)348{349 struct vt8231_data *data = dev_get_drvdata(dev);350 unsigned long val;351 int err;352 353 err = kstrtoul(buf, 10, &val);354 if (err)355 return err;356 357 mutex_lock(&data->update_lock);358 data->in_min[5] = clamp_val(((val * 958 * 34) / (10000 * 54)) + 3,359 0, 255);360 vt8231_write_value(data, regvoltmin[5], data->in_min[5]);361 mutex_unlock(&data->update_lock);362 return count;363}364 365static ssize_t in5_max_store(struct device *dev,366 struct device_attribute *attr, const char *buf,367 size_t count)368{369 struct vt8231_data *data = dev_get_drvdata(dev);370 unsigned long val;371 int err;372 373 err = kstrtoul(buf, 10, &val);374 if (err)375 return err;376 377 mutex_lock(&data->update_lock);378 data->in_max[5] = clamp_val(((val * 958 * 34) / (10000 * 54)) + 3,379 0, 255);380 vt8231_write_value(data, regvoltmax[5], data->in_max[5]);381 mutex_unlock(&data->update_lock);382 return count;383}384 385static SENSOR_DEVICE_ATTR_RO(in0_input, in, 0);386static SENSOR_DEVICE_ATTR_RW(in0_min, in_min, 0);387static SENSOR_DEVICE_ATTR_RW(in0_max, in_max, 0);388static SENSOR_DEVICE_ATTR_RO(in1_input, in, 1);389static SENSOR_DEVICE_ATTR_RW(in1_min, in_min, 1);390static SENSOR_DEVICE_ATTR_RW(in1_max, in_max, 1);391static SENSOR_DEVICE_ATTR_RO(in2_input, in, 2);392static SENSOR_DEVICE_ATTR_RW(in2_min, in_min, 2);393static SENSOR_DEVICE_ATTR_RW(in2_max, in_max, 2);394static SENSOR_DEVICE_ATTR_RO(in3_input, in, 3);395static SENSOR_DEVICE_ATTR_RW(in3_min, in_min, 3);396static SENSOR_DEVICE_ATTR_RW(in3_max, in_max, 3);397static SENSOR_DEVICE_ATTR_RO(in4_input, in, 4);398static SENSOR_DEVICE_ATTR_RW(in4_min, in_min, 4);399static SENSOR_DEVICE_ATTR_RW(in4_max, in_max, 4);400 401static DEVICE_ATTR_RO(in5_input);402static DEVICE_ATTR_RW(in5_min);403static DEVICE_ATTR_RW(in5_max);404 405/* Temperatures */406static ssize_t temp1_input_show(struct device *dev,407 struct device_attribute *attr, char *buf)408{409 struct vt8231_data *data = vt8231_update_device(dev);410 return sprintf(buf, "%d\n", data->temp[0] * 250);411}412 413static ssize_t temp1_max_show(struct device *dev, struct device_attribute *attr,414 char *buf)415{416 struct vt8231_data *data = vt8231_update_device(dev);417 return sprintf(buf, "%d\n", data->temp_max[0] * 1000);418}419 420static ssize_t temp1_max_hyst_show(struct device *dev,421 struct device_attribute *attr, char *buf)422{423 struct vt8231_data *data = vt8231_update_device(dev);424 return sprintf(buf, "%d\n", data->temp_min[0] * 1000);425}426 427static ssize_t temp1_max_store(struct device *dev,428 struct device_attribute *attr, const char *buf,429 size_t count)430{431 struct vt8231_data *data = dev_get_drvdata(dev);432 long val;433 int err;434 435 err = kstrtol(buf, 10, &val);436 if (err)437 return err;438 439 mutex_lock(&data->update_lock);440 data->temp_max[0] = clamp_val((val + 500) / 1000, 0, 255);441 vt8231_write_value(data, regtempmax[0], data->temp_max[0]);442 mutex_unlock(&data->update_lock);443 return count;444}445static ssize_t temp1_max_hyst_store(struct device *dev,446 struct device_attribute *attr,447 const char *buf, size_t count)448{449 struct vt8231_data *data = dev_get_drvdata(dev);450 long val;451 int err;452 453 err = kstrtol(buf, 10, &val);454 if (err)455 return err;456 457 mutex_lock(&data->update_lock);458 data->temp_min[0] = clamp_val((val + 500) / 1000, 0, 255);459 vt8231_write_value(data, regtempmin[0], data->temp_min[0]);460 mutex_unlock(&data->update_lock);461 return count;462}463 464static ssize_t temp_show(struct device *dev, struct device_attribute *attr,465 char *buf)466{467 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);468 int nr = sensor_attr->index;469 struct vt8231_data *data = vt8231_update_device(dev);470 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[nr]));471}472 473static ssize_t temp_max_show(struct device *dev,474 struct device_attribute *attr, char *buf)475{476 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);477 int nr = sensor_attr->index;478 struct vt8231_data *data = vt8231_update_device(dev);479 return sprintf(buf, "%d\n", TEMP_MAXMIN_FROM_REG(data->temp_max[nr]));480}481 482static ssize_t temp_min_show(struct device *dev,483 struct device_attribute *attr, char *buf)484{485 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);486 int nr = sensor_attr->index;487 struct vt8231_data *data = vt8231_update_device(dev);488 return sprintf(buf, "%d\n", TEMP_MAXMIN_FROM_REG(data->temp_min[nr]));489}490 491static ssize_t temp_max_store(struct device *dev,492 struct device_attribute *attr, const char *buf,493 size_t count)494{495 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);496 int nr = sensor_attr->index;497 struct vt8231_data *data = dev_get_drvdata(dev);498 long val;499 int err;500 501 err = kstrtol(buf, 10, &val);502 if (err)503 return err;504 505 mutex_lock(&data->update_lock);506 data->temp_max[nr] = clamp_val(TEMP_MAXMIN_TO_REG(val), 0, 255);507 vt8231_write_value(data, regtempmax[nr], data->temp_max[nr]);508 mutex_unlock(&data->update_lock);509 return count;510}511static ssize_t temp_min_store(struct device *dev,512 struct device_attribute *attr, const char *buf,513 size_t count)514{515 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);516 int nr = sensor_attr->index;517 struct vt8231_data *data = dev_get_drvdata(dev);518 long val;519 int err;520 521 err = kstrtol(buf, 10, &val);522 if (err)523 return err;524 525 mutex_lock(&data->update_lock);526 data->temp_min[nr] = clamp_val(TEMP_MAXMIN_TO_REG(val), 0, 255);527 vt8231_write_value(data, regtempmin[nr], data->temp_min[nr]);528 mutex_unlock(&data->update_lock);529 return count;530}531 532/*533 * Note that these map the Linux temperature sensor numbering (1-6) to the VIA534 * temperature sensor numbering (0-5)535 */536 537static DEVICE_ATTR_RO(temp1_input);538static DEVICE_ATTR_RW(temp1_max);539static DEVICE_ATTR_RW(temp1_max_hyst);540 541static SENSOR_DEVICE_ATTR_RO(temp2_input, temp, 1);542static SENSOR_DEVICE_ATTR_RW(temp2_max, temp_max, 1);543static SENSOR_DEVICE_ATTR_RW(temp2_max_hyst, temp_min, 1);544static SENSOR_DEVICE_ATTR_RO(temp3_input, temp, 2);545static SENSOR_DEVICE_ATTR_RW(temp3_max, temp_max, 2);546static SENSOR_DEVICE_ATTR_RW(temp3_max_hyst, temp_min, 2);547static SENSOR_DEVICE_ATTR_RO(temp4_input, temp, 3);548static SENSOR_DEVICE_ATTR_RW(temp4_max, temp_max, 3);549static SENSOR_DEVICE_ATTR_RW(temp4_max_hyst, temp_min, 3);550static SENSOR_DEVICE_ATTR_RO(temp5_input, temp, 4);551static SENSOR_DEVICE_ATTR_RW(temp5_max, temp_max, 4);552static SENSOR_DEVICE_ATTR_RW(temp5_max_hyst, temp_min, 4);553static SENSOR_DEVICE_ATTR_RO(temp6_input, temp, 5);554static SENSOR_DEVICE_ATTR_RW(temp6_max, temp_max, 5);555static SENSOR_DEVICE_ATTR_RW(temp6_max_hyst, temp_min, 5);556 557/* Fans */558static ssize_t fan_show(struct device *dev, struct device_attribute *attr,559 char *buf)560{561 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);562 int nr = sensor_attr->index;563 struct vt8231_data *data = vt8231_update_device(dev);564 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[nr],565 DIV_FROM_REG(data->fan_div[nr])));566}567 568static ssize_t fan_min_show(struct device *dev, struct device_attribute *attr,569 char *buf)570{571 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);572 int nr = sensor_attr->index;573 struct vt8231_data *data = vt8231_update_device(dev);574 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[nr],575 DIV_FROM_REG(data->fan_div[nr])));576}577 578static ssize_t fan_div_show(struct device *dev, struct device_attribute *attr,579 char *buf)580{581 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);582 int nr = sensor_attr->index;583 struct vt8231_data *data = vt8231_update_device(dev);584 return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr]));585}586 587static ssize_t fan_min_store(struct device *dev,588 struct device_attribute *attr, const char *buf,589 size_t count)590{591 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);592 int nr = sensor_attr->index;593 struct vt8231_data *data = dev_get_drvdata(dev);594 unsigned long val;595 int err;596 597 err = kstrtoul(buf, 10, &val);598 if (err)599 return err;600 601 mutex_lock(&data->update_lock);602 data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr]));603 vt8231_write_value(data, VT8231_REG_FAN_MIN(nr), data->fan_min[nr]);604 mutex_unlock(&data->update_lock);605 return count;606}607 608static ssize_t fan_div_store(struct device *dev,609 struct device_attribute *attr, const char *buf,610 size_t count)611{612 struct vt8231_data *data = dev_get_drvdata(dev);613 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);614 unsigned long val;615 int nr = sensor_attr->index;616 int old = vt8231_read_value(data, VT8231_REG_FANDIV);617 long min = FAN_FROM_REG(data->fan_min[nr],618 DIV_FROM_REG(data->fan_div[nr]));619 int err;620 621 err = kstrtoul(buf, 10, &val);622 if (err)623 return err;624 625 mutex_lock(&data->update_lock);626 switch (val) {627 case 1:628 data->fan_div[nr] = 0;629 break;630 case 2:631 data->fan_div[nr] = 1;632 break;633 case 4:634 data->fan_div[nr] = 2;635 break;636 case 8:637 data->fan_div[nr] = 3;638 break;639 default:640 dev_err(dev,641 "fan_div value %ld not supported. Choose one of 1, 2, 4 or 8!\n",642 val);643 mutex_unlock(&data->update_lock);644 return -EINVAL;645 }646 647 /* Correct the fan minimum speed */648 data->fan_min[nr] = FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr]));649 vt8231_write_value(data, VT8231_REG_FAN_MIN(nr), data->fan_min[nr]);650 651 old = (old & 0x0f) | (data->fan_div[1] << 6) | (data->fan_div[0] << 4);652 vt8231_write_value(data, VT8231_REG_FANDIV, old);653 mutex_unlock(&data->update_lock);654 return count;655}656 657static SENSOR_DEVICE_ATTR_RO(fan1_input, fan, 0);658static SENSOR_DEVICE_ATTR_RW(fan1_min, fan_min, 0);659static SENSOR_DEVICE_ATTR_RW(fan1_div, fan_div, 0);660static SENSOR_DEVICE_ATTR_RO(fan2_input, fan, 1);661static SENSOR_DEVICE_ATTR_RW(fan2_min, fan_min, 1);662static SENSOR_DEVICE_ATTR_RW(fan2_div, fan_div, 1);663 664/* Alarms */665static ssize_t alarms_show(struct device *dev, struct device_attribute *attr,666 char *buf)667{668 struct vt8231_data *data = vt8231_update_device(dev);669 return sprintf(buf, "%d\n", data->alarms);670}671static DEVICE_ATTR_RO(alarms);672 673static ssize_t alarm_show(struct device *dev, struct device_attribute *attr,674 char *buf)675{676 int bitnr = to_sensor_dev_attr(attr)->index;677 struct vt8231_data *data = vt8231_update_device(dev);678 return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1);679}680static SENSOR_DEVICE_ATTR_RO(temp1_alarm, alarm, 4);681static SENSOR_DEVICE_ATTR_RO(temp2_alarm, alarm, 11);682static SENSOR_DEVICE_ATTR_RO(temp3_alarm, alarm, 0);683static SENSOR_DEVICE_ATTR_RO(temp4_alarm, alarm, 1);684static SENSOR_DEVICE_ATTR_RO(temp5_alarm, alarm, 3);685static SENSOR_DEVICE_ATTR_RO(temp6_alarm, alarm, 8);686static SENSOR_DEVICE_ATTR_RO(in0_alarm, alarm, 11);687static SENSOR_DEVICE_ATTR_RO(in1_alarm, alarm, 0);688static SENSOR_DEVICE_ATTR_RO(in2_alarm, alarm, 1);689static SENSOR_DEVICE_ATTR_RO(in3_alarm, alarm, 3);690static SENSOR_DEVICE_ATTR_RO(in4_alarm, alarm, 8);691static SENSOR_DEVICE_ATTR_RO(in5_alarm, alarm, 2);692static SENSOR_DEVICE_ATTR_RO(fan1_alarm, alarm, 6);693static SENSOR_DEVICE_ATTR_RO(fan2_alarm, alarm, 7);694 695static ssize_t name_show(struct device *dev, struct device_attribute696 *devattr, char *buf)697{698 struct vt8231_data *data = dev_get_drvdata(dev);699 return sprintf(buf, "%s\n", data->name);700}701static DEVICE_ATTR_RO(name);702 703static struct attribute *vt8231_attributes_temps[6][5] = {704 {705 &dev_attr_temp1_input.attr,706 &dev_attr_temp1_max_hyst.attr,707 &dev_attr_temp1_max.attr,708 &sensor_dev_attr_temp1_alarm.dev_attr.attr,709 NULL710 }, {711 &sensor_dev_attr_temp2_input.dev_attr.attr,712 &sensor_dev_attr_temp2_max_hyst.dev_attr.attr,713 &sensor_dev_attr_temp2_max.dev_attr.attr,714 &sensor_dev_attr_temp2_alarm.dev_attr.attr,715 NULL716 }, {717 &sensor_dev_attr_temp3_input.dev_attr.attr,718 &sensor_dev_attr_temp3_max_hyst.dev_attr.attr,719 &sensor_dev_attr_temp3_max.dev_attr.attr,720 &sensor_dev_attr_temp3_alarm.dev_attr.attr,721 NULL722 }, {723 &sensor_dev_attr_temp4_input.dev_attr.attr,724 &sensor_dev_attr_temp4_max_hyst.dev_attr.attr,725 &sensor_dev_attr_temp4_max.dev_attr.attr,726 &sensor_dev_attr_temp4_alarm.dev_attr.attr,727 NULL728 }, {729 &sensor_dev_attr_temp5_input.dev_attr.attr,730 &sensor_dev_attr_temp5_max_hyst.dev_attr.attr,731 &sensor_dev_attr_temp5_max.dev_attr.attr,732 &sensor_dev_attr_temp5_alarm.dev_attr.attr,733 NULL734 }, {735 &sensor_dev_attr_temp6_input.dev_attr.attr,736 &sensor_dev_attr_temp6_max_hyst.dev_attr.attr,737 &sensor_dev_attr_temp6_max.dev_attr.attr,738 &sensor_dev_attr_temp6_alarm.dev_attr.attr,739 NULL740 }741};742 743static const struct attribute_group vt8231_group_temps[6] = {744 { .attrs = vt8231_attributes_temps[0] },745 { .attrs = vt8231_attributes_temps[1] },746 { .attrs = vt8231_attributes_temps[2] },747 { .attrs = vt8231_attributes_temps[3] },748 { .attrs = vt8231_attributes_temps[4] },749 { .attrs = vt8231_attributes_temps[5] },750};751 752static struct attribute *vt8231_attributes_volts[6][5] = {753 {754 &sensor_dev_attr_in0_input.dev_attr.attr,755 &sensor_dev_attr_in0_min.dev_attr.attr,756 &sensor_dev_attr_in0_max.dev_attr.attr,757 &sensor_dev_attr_in0_alarm.dev_attr.attr,758 NULL759 }, {760 &sensor_dev_attr_in1_input.dev_attr.attr,761 &sensor_dev_attr_in1_min.dev_attr.attr,762 &sensor_dev_attr_in1_max.dev_attr.attr,763 &sensor_dev_attr_in1_alarm.dev_attr.attr,764 NULL765 }, {766 &sensor_dev_attr_in2_input.dev_attr.attr,767 &sensor_dev_attr_in2_min.dev_attr.attr,768 &sensor_dev_attr_in2_max.dev_attr.attr,769 &sensor_dev_attr_in2_alarm.dev_attr.attr,770 NULL771 }, {772 &sensor_dev_attr_in3_input.dev_attr.attr,773 &sensor_dev_attr_in3_min.dev_attr.attr,774 &sensor_dev_attr_in3_max.dev_attr.attr,775 &sensor_dev_attr_in3_alarm.dev_attr.attr,776 NULL777 }, {778 &sensor_dev_attr_in4_input.dev_attr.attr,779 &sensor_dev_attr_in4_min.dev_attr.attr,780 &sensor_dev_attr_in4_max.dev_attr.attr,781 &sensor_dev_attr_in4_alarm.dev_attr.attr,782 NULL783 }, {784 &dev_attr_in5_input.attr,785 &dev_attr_in5_min.attr,786 &dev_attr_in5_max.attr,787 &sensor_dev_attr_in5_alarm.dev_attr.attr,788 NULL789 }790};791 792static const struct attribute_group vt8231_group_volts[6] = {793 { .attrs = vt8231_attributes_volts[0] },794 { .attrs = vt8231_attributes_volts[1] },795 { .attrs = vt8231_attributes_volts[2] },796 { .attrs = vt8231_attributes_volts[3] },797 { .attrs = vt8231_attributes_volts[4] },798 { .attrs = vt8231_attributes_volts[5] },799};800 801static struct attribute *vt8231_attributes[] = {802 &sensor_dev_attr_fan1_input.dev_attr.attr,803 &sensor_dev_attr_fan2_input.dev_attr.attr,804 &sensor_dev_attr_fan1_min.dev_attr.attr,805 &sensor_dev_attr_fan2_min.dev_attr.attr,806 &sensor_dev_attr_fan1_div.dev_attr.attr,807 &sensor_dev_attr_fan2_div.dev_attr.attr,808 &sensor_dev_attr_fan1_alarm.dev_attr.attr,809 &sensor_dev_attr_fan2_alarm.dev_attr.attr,810 &dev_attr_alarms.attr,811 &dev_attr_name.attr,812 NULL813};814 815static const struct attribute_group vt8231_group = {816 .attrs = vt8231_attributes,817};818 819static void vt8231_init_device(struct vt8231_data *data)820{821 vt8231_write_value(data, VT8231_REG_TEMP1_CONFIG, 0);822 vt8231_write_value(data, VT8231_REG_TEMP2_CONFIG, 0);823}824 825static int vt8231_probe(struct platform_device *pdev)826{827 struct resource *res;828 struct vt8231_data *data;829 int err = 0, i;830 831 /* Reserve the ISA region */832 res = platform_get_resource(pdev, IORESOURCE_IO, 0);833 if (!devm_request_region(&pdev->dev, res->start, VT8231_EXTENT,834 DRIVER_NAME)) {835 dev_err(&pdev->dev, "Region 0x%lx-0x%lx already in use!\n",836 (unsigned long)res->start, (unsigned long)res->end);837 return -ENODEV;838 }839 840 data = devm_kzalloc(&pdev->dev, sizeof(struct vt8231_data), GFP_KERNEL);841 if (!data)842 return -ENOMEM;843 844 platform_set_drvdata(pdev, data);845 data->addr = res->start;846 data->name = DRIVER_NAME;847 848 mutex_init(&data->update_lock);849 vt8231_init_device(data);850 851 /* Register sysfs hooks */852 err = sysfs_create_group(&pdev->dev.kobj, &vt8231_group);853 if (err)854 return err;855 856 /* Must update device information to find out the config field */857 data->uch_config = vt8231_read_value(data, VT8231_REG_UCH_CONFIG);858 859 for (i = 0; i < ARRAY_SIZE(vt8231_group_temps); i++) {860 if (ISTEMP(i, data->uch_config)) {861 err = sysfs_create_group(&pdev->dev.kobj,862 &vt8231_group_temps[i]);863 if (err)864 goto exit_remove_files;865 }866 }867 868 for (i = 0; i < ARRAY_SIZE(vt8231_group_volts); i++) {869 if (ISVOLT(i, data->uch_config)) {870 err = sysfs_create_group(&pdev->dev.kobj,871 &vt8231_group_volts[i]);872 if (err)873 goto exit_remove_files;874 }875 }876 877 data->hwmon_dev = hwmon_device_register(&pdev->dev);878 if (IS_ERR(data->hwmon_dev)) {879 err = PTR_ERR(data->hwmon_dev);880 goto exit_remove_files;881 }882 return 0;883 884exit_remove_files:885 for (i = 0; i < ARRAY_SIZE(vt8231_group_volts); i++)886 sysfs_remove_group(&pdev->dev.kobj, &vt8231_group_volts[i]);887 888 for (i = 0; i < ARRAY_SIZE(vt8231_group_temps); i++)889 sysfs_remove_group(&pdev->dev.kobj, &vt8231_group_temps[i]);890 891 sysfs_remove_group(&pdev->dev.kobj, &vt8231_group);892 return err;893}894 895static void vt8231_remove(struct platform_device *pdev)896{897 struct vt8231_data *data = platform_get_drvdata(pdev);898 int i;899 900 hwmon_device_unregister(data->hwmon_dev);901 902 for (i = 0; i < ARRAY_SIZE(vt8231_group_volts); i++)903 sysfs_remove_group(&pdev->dev.kobj, &vt8231_group_volts[i]);904 905 for (i = 0; i < ARRAY_SIZE(vt8231_group_temps); i++)906 sysfs_remove_group(&pdev->dev.kobj, &vt8231_group_temps[i]);907 908 sysfs_remove_group(&pdev->dev.kobj, &vt8231_group);909}910 911 912static struct platform_driver vt8231_driver = {913 .driver = {914 .name = DRIVER_NAME,915 },916 .probe = vt8231_probe,917 .remove_new = vt8231_remove,918};919 920static const struct pci_device_id vt8231_pci_ids[] = {921 { PCI_DEVICE(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8231_4) },922 { 0, }923};924 925MODULE_DEVICE_TABLE(pci, vt8231_pci_ids);926 927static int vt8231_device_add(unsigned short address)928{929 struct resource res = {930 .start = address,931 .end = address + VT8231_EXTENT - 1,932 .name = DRIVER_NAME,933 .flags = IORESOURCE_IO,934 };935 int err;936 937 err = acpi_check_resource_conflict(&res);938 if (err)939 goto exit;940 941 pdev = platform_device_alloc(DRIVER_NAME, address);942 if (!pdev) {943 err = -ENOMEM;944 pr_err("Device allocation failed\n");945 goto exit;946 }947 948 err = platform_device_add_resources(pdev, &res, 1);949 if (err) {950 pr_err("Device resource addition failed (%d)\n", err);951 goto exit_device_put;952 }953 954 err = platform_device_add(pdev);955 if (err) {956 pr_err("Device addition failed (%d)\n", err);957 goto exit_device_put;958 }959 960 return 0;961 962exit_device_put:963 platform_device_put(pdev);964exit:965 return err;966}967 968static int vt8231_pci_probe(struct pci_dev *dev,969 const struct pci_device_id *id)970{971 u16 address, val;972 int ret;973 974 if (force_addr) {975 address = force_addr & 0xff00;976 dev_warn(&dev->dev, "Forcing ISA address 0x%x\n",977 address);978 979 ret = pci_write_config_word(dev, VT8231_BASE_REG, address | 1);980 if (ret != PCIBIOS_SUCCESSFUL)981 return -ENODEV;982 }983 984 pci_read_config_word(dev, VT8231_BASE_REG, &val);985 if (val == (u16)~0)986 return -ENODEV;987 988 address = val & ~(VT8231_EXTENT - 1);989 if (address == 0) {990 dev_err(&dev->dev, "base address not set - upgrade BIOS or use force_addr=0xaddr\n");991 return -ENODEV;992 }993 994 pci_read_config_word(dev, VT8231_ENABLE_REG, &val);995 if (val == (u16)~0)996 return -ENODEV;997 998 if (!(val & 0x0001)) {999 dev_warn(&dev->dev, "enabling sensors\n");1000 ret = pci_write_config_word(dev, VT8231_ENABLE_REG, val | 0x1);1001 if (ret != PCIBIOS_SUCCESSFUL)1002 return -ENODEV;1003 }1004 1005 if (platform_driver_register(&vt8231_driver))1006 goto exit;1007 1008 /* Sets global pdev as a side effect */1009 if (vt8231_device_add(address))1010 goto exit_unregister;1011 1012 /*1013 * Always return failure here. This is to allow other drivers to bind1014 * to this pci device. We don't really want to have control over the1015 * pci device, we only wanted to read as few register values from it.1016 */1017 1018 /*1019 * We do, however, mark ourselves as using the PCI device to stop it1020 * getting unloaded.1021 */1022 s_bridge = pci_dev_get(dev);1023 return -ENODEV;1024 1025exit_unregister:1026 platform_driver_unregister(&vt8231_driver);1027exit:1028 return -ENODEV;1029}1030 1031static struct pci_driver vt8231_pci_driver = {1032 .name = DRIVER_NAME,1033 .id_table = vt8231_pci_ids,1034 .probe = vt8231_pci_probe,1035};1036 1037static int __init sm_vt8231_init(void)1038{1039 return pci_register_driver(&vt8231_pci_driver);1040}1041 1042static void __exit sm_vt8231_exit(void)1043{1044 pci_unregister_driver(&vt8231_pci_driver);1045 if (s_bridge != NULL) {1046 platform_device_unregister(pdev);1047 platform_driver_unregister(&vt8231_driver);1048 pci_dev_put(s_bridge);1049 s_bridge = NULL;1050 }1051}1052 1053MODULE_AUTHOR("Roger Lucas <vt8231@hiddenengine.co.uk>");1054MODULE_DESCRIPTION("VT8231 sensors");1055MODULE_LICENSE("GPL");1056 1057module_init(sm_vt8231_init);1058module_exit(sm_vt8231_exit);1059