1631 lines · c
1// SPDX-License-Identifier: GPL-2.0-or-later2/*3 * abituguru.c Copyright (c) 2005-2006 Hans de Goede <hdegoede@redhat.com>4 */5/*6 * This driver supports the sensor part of the first and second revision of7 * the custom Abit uGuru chip found on Abit uGuru motherboards. Note: because8 * of lack of specs the CPU/RAM voltage & frequency control is not supported!9 */10 11#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt12 13#include <linux/module.h>14#include <linux/sched.h>15#include <linux/init.h>16#include <linux/slab.h>17#include <linux/jiffies.h>18#include <linux/mutex.h>19#include <linux/err.h>20#include <linux/delay.h>21#include <linux/platform_device.h>22#include <linux/hwmon.h>23#include <linux/hwmon-sysfs.h>24#include <linux/dmi.h>25#include <linux/io.h>26 27/* Banks */28#define ABIT_UGURU_ALARM_BANK 0x20 /* 1x 3 bytes */29#define ABIT_UGURU_SENSOR_BANK1 0x21 /* 16x volt and temp */30#define ABIT_UGURU_FAN_PWM 0x24 /* 3x 5 bytes */31#define ABIT_UGURU_SENSOR_BANK2 0x26 /* fans */32/* max nr of sensors in bank1, a bank1 sensor can be in, temp or nc */33#define ABIT_UGURU_MAX_BANK1_SENSORS 1634/*35 * Warning if you increase one of the 2 MAX defines below to 10 or higher you36 * should adjust the belonging _NAMES_LENGTH macro for the 2 digit number!37 */38/* max nr of sensors in bank2, currently mb's with max 6 fans are known */39#define ABIT_UGURU_MAX_BANK2_SENSORS 640/* max nr of pwm outputs, currently mb's with max 5 pwm outputs are known */41#define ABIT_UGURU_MAX_PWMS 542/* uGuru sensor bank 1 flags */ /* Alarm if: */43#define ABIT_UGURU_TEMP_HIGH_ALARM_ENABLE 0x01 /* temp over warn */44#define ABIT_UGURU_VOLT_HIGH_ALARM_ENABLE 0x02 /* volt over max */45#define ABIT_UGURU_VOLT_LOW_ALARM_ENABLE 0x04 /* volt under min */46#define ABIT_UGURU_TEMP_HIGH_ALARM_FLAG 0x10 /* temp is over warn */47#define ABIT_UGURU_VOLT_HIGH_ALARM_FLAG 0x20 /* volt is over max */48#define ABIT_UGURU_VOLT_LOW_ALARM_FLAG 0x40 /* volt is under min */49/* uGuru sensor bank 2 flags */ /* Alarm if: */50#define ABIT_UGURU_FAN_LOW_ALARM_ENABLE 0x01 /* fan under min */51/* uGuru sensor bank common flags */52#define ABIT_UGURU_BEEP_ENABLE 0x08 /* beep if alarm */53#define ABIT_UGURU_SHUTDOWN_ENABLE 0x80 /* shutdown if alarm */54/* uGuru fan PWM (speed control) flags */55#define ABIT_UGURU_FAN_PWM_ENABLE 0x80 /* enable speed control */56/* Values used for conversion */57#define ABIT_UGURU_FAN_MAX 15300 /* RPM */58/* Bank1 sensor types */59#define ABIT_UGURU_IN_SENSOR 060#define ABIT_UGURU_TEMP_SENSOR 161#define ABIT_UGURU_NC 262/*63 * In many cases we need to wait for the uGuru to reach a certain status, most64 * of the time it will reach this status within 30 - 90 ISA reads, and thus we65 * can best busy wait. This define gives the total amount of reads to try.66 */67#define ABIT_UGURU_WAIT_TIMEOUT 12568/*69 * However sometimes older versions of the uGuru seem to be distracted and they70 * do not respond for a long time. To handle this we sleep before each of the71 * last ABIT_UGURU_WAIT_TIMEOUT_SLEEP tries.72 */73#define ABIT_UGURU_WAIT_TIMEOUT_SLEEP 574/*75 * Normally all expected status in abituguru_ready, are reported after the76 * first read, but sometimes not and we need to poll.77 */78#define ABIT_UGURU_READY_TIMEOUT 579/* Maximum 3 retries on timedout reads/writes, delay 200 ms before retrying */80#define ABIT_UGURU_MAX_RETRIES 381#define ABIT_UGURU_RETRY_DELAY (HZ/5)82/* Maximum 2 timeouts in abituguru_update_device, iow 3 in a row is an error */83#define ABIT_UGURU_MAX_TIMEOUTS 284/* utility macros */85#define ABIT_UGURU_NAME "abituguru"86#define ABIT_UGURU_DEBUG(level, format, arg...) \87 do { \88 if (level <= verbose) \89 pr_debug(format , ## arg); \90 } while (0)91 92/* Macros to help calculate the sysfs_names array length */93/*94 * sum of strlen of: in??_input\0, in??_{min,max}\0, in??_{min,max}_alarm\0,95 * in??_{min,max}_alarm_enable\0, in??_beep\0, in??_shutdown\096 */97#define ABITUGURU_IN_NAMES_LENGTH (11 + 2 * 9 + 2 * 15 + 2 * 22 + 10 + 14)98/*99 * sum of strlen of: temp??_input\0, temp??_max\0, temp??_crit\0,100 * temp??_alarm\0, temp??_alarm_enable\0, temp??_beep\0, temp??_shutdown\0101 */102#define ABITUGURU_TEMP_NAMES_LENGTH (13 + 11 + 12 + 13 + 20 + 12 + 16)103/*104 * sum of strlen of: fan?_input\0, fan?_min\0, fan?_alarm\0,105 * fan?_alarm_enable\0, fan?_beep\0, fan?_shutdown\0106 */107#define ABITUGURU_FAN_NAMES_LENGTH (11 + 9 + 11 + 18 + 10 + 14)108/*109 * sum of strlen of: pwm?_enable\0, pwm?_auto_channels_temp\0,110 * pwm?_auto_point{1,2}_pwm\0, pwm?_auto_point{1,2}_temp\0111 */112#define ABITUGURU_PWM_NAMES_LENGTH (12 + 24 + 2 * 21 + 2 * 22)113/* IN_NAMES_LENGTH > TEMP_NAMES_LENGTH so assume all bank1 sensors are in */114#define ABITUGURU_SYSFS_NAMES_LENGTH ( \115 ABIT_UGURU_MAX_BANK1_SENSORS * ABITUGURU_IN_NAMES_LENGTH + \116 ABIT_UGURU_MAX_BANK2_SENSORS * ABITUGURU_FAN_NAMES_LENGTH + \117 ABIT_UGURU_MAX_PWMS * ABITUGURU_PWM_NAMES_LENGTH)118 119/*120 * All the macros below are named identical to the oguru and oguru2 programs121 * reverse engineered by Olle Sandberg, hence the names might not be 100%122 * logical. I could come up with better names, but I prefer keeping the names123 * identical so that this driver can be compared with his work more easily.124 */125/* Two i/o-ports are used by uGuru */126#define ABIT_UGURU_BASE 0x00E0127/* Used to tell uGuru what to read and to read the actual data */128#define ABIT_UGURU_CMD 0x00129/* Mostly used to check if uGuru is busy */130#define ABIT_UGURU_DATA 0x04131#define ABIT_UGURU_REGION_LENGTH 5132/* uGuru status' */133#define ABIT_UGURU_STATUS_WRITE 0x00 /* Ready to be written */134#define ABIT_UGURU_STATUS_READ 0x01 /* Ready to be read */135#define ABIT_UGURU_STATUS_INPUT 0x08 /* More input */136#define ABIT_UGURU_STATUS_READY 0x09 /* Ready to be written */137 138/* Constants */139/* in (Volt) sensors go up to 3494 mV, temp to 255000 millidegrees Celsius */140static const int abituguru_bank1_max_value[2] = { 3494, 255000 };141/*142 * Min / Max allowed values for sensor2 (fan) alarm threshold, these values143 * correspond to 300-3000 RPM144 */145static const u8 abituguru_bank2_min_threshold = 5;146static const u8 abituguru_bank2_max_threshold = 50;147/*148 * Register 0 is a bitfield, 1 and 2 are pwm settings (255 = 100%), 3 and 4149 * are temperature trip points.150 */151static const int abituguru_pwm_settings_multiplier[5] = { 0, 1, 1, 1000, 1000 };152/*153 * Min / Max allowed values for pwm_settings. Note: pwm1 (CPU fan) is a154 * special case the minimum allowed pwm% setting for this is 30% (77) on155 * some MB's this special case is handled in the code!156 */157static const u8 abituguru_pwm_min[5] = { 0, 170, 170, 25, 25 };158static const u8 abituguru_pwm_max[5] = { 0, 255, 255, 75, 75 };159 160 161/* Insmod parameters */162static bool force;163module_param(force, bool, 0);164MODULE_PARM_DESC(force, "Set to one to force detection.");165static int bank1_types[ABIT_UGURU_MAX_BANK1_SENSORS] = { -1, -1, -1, -1, -1,166 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 };167module_param_array(bank1_types, int, NULL, 0);168MODULE_PARM_DESC(bank1_types, "Bank1 sensortype autodetection override:\n"169 " -1 autodetect\n"170 " 0 volt sensor\n"171 " 1 temp sensor\n"172 " 2 not connected");173static int fan_sensors;174module_param(fan_sensors, int, 0);175MODULE_PARM_DESC(fan_sensors, "Number of fan sensors on the uGuru "176 "(0 = autodetect)");177static int pwms;178module_param(pwms, int, 0);179MODULE_PARM_DESC(pwms, "Number of PWMs on the uGuru "180 "(0 = autodetect)");181 182/* Default verbose is 2, since this driver is still in the testing phase */183static int verbose = 2;184module_param(verbose, int, 0644);185MODULE_PARM_DESC(verbose, "How verbose should the driver be? (0-3):\n"186 " 0 normal output\n"187 " 1 + verbose error reporting\n"188 " 2 + sensors type probing info\n"189 " 3 + retryable error reporting");190 191 192/*193 * For the Abit uGuru, we need to keep some data in memory.194 * The structure is dynamically allocated, at the same time when a new195 * abituguru device is allocated.196 */197struct abituguru_data {198 struct device *hwmon_dev; /* hwmon registered device */199 struct mutex update_lock; /* protect access to data and uGuru */200 unsigned long last_updated; /* In jiffies */201 unsigned short addr; /* uguru base address */202 char uguru_ready; /* is the uguru in ready state? */203 unsigned char update_timeouts; /*204 * number of update timeouts since last205 * successful update206 */207 208 /*209 * The sysfs attr and their names are generated automatically, for bank1210 * we cannot use a predefined array because we don't know beforehand211 * of a sensor is a volt or a temp sensor, for bank2 and the pwms its212 * easier todo things the same way. For in sensors we have 9 (temp 7)213 * sysfs entries per sensor, for bank2 and pwms 6.214 */215 struct sensor_device_attribute_2 sysfs_attr[216 ABIT_UGURU_MAX_BANK1_SENSORS * 9 +217 ABIT_UGURU_MAX_BANK2_SENSORS * 6 + ABIT_UGURU_MAX_PWMS * 6];218 /* Buffer to store the dynamically generated sysfs names */219 char sysfs_names[ABITUGURU_SYSFS_NAMES_LENGTH];220 221 /* Bank 1 data */222 /* number of and addresses of [0] in, [1] temp sensors */223 u8 bank1_sensors[2];224 u8 bank1_address[2][ABIT_UGURU_MAX_BANK1_SENSORS];225 u8 bank1_value[ABIT_UGURU_MAX_BANK1_SENSORS];226 /*227 * This array holds 3 entries per sensor for the bank 1 sensor settings228 * (flags, min, max for voltage / flags, warn, shutdown for temp).229 */230 u8 bank1_settings[ABIT_UGURU_MAX_BANK1_SENSORS][3];231 /*232 * Maximum value for each sensor used for scaling in mV/millidegrees233 * Celsius.234 */235 int bank1_max_value[ABIT_UGURU_MAX_BANK1_SENSORS];236 237 /* Bank 2 data, ABIT_UGURU_MAX_BANK2_SENSORS entries for bank2 */238 u8 bank2_sensors; /* actual number of bank2 sensors found */239 u8 bank2_value[ABIT_UGURU_MAX_BANK2_SENSORS];240 u8 bank2_settings[ABIT_UGURU_MAX_BANK2_SENSORS][2]; /* flags, min */241 242 /* Alarms 2 bytes for bank1, 1 byte for bank2 */243 u8 alarms[3];244 245 /* Fan PWM (speed control) 5 bytes per PWM */246 u8 pwms; /* actual number of pwms found */247 u8 pwm_settings[ABIT_UGURU_MAX_PWMS][5];248};249 250static const char *never_happen = "This should never happen.";251static const char *report_this =252 "Please report this to the abituguru maintainer (see MAINTAINERS)";253 254/* wait till the uguru is in the specified state */255static int abituguru_wait(struct abituguru_data *data, u8 state)256{257 int timeout = ABIT_UGURU_WAIT_TIMEOUT;258 259 while (inb_p(data->addr + ABIT_UGURU_DATA) != state) {260 timeout--;261 if (timeout == 0)262 return -EBUSY;263 /*264 * sleep a bit before our last few tries, see the comment on265 * this where ABIT_UGURU_WAIT_TIMEOUT_SLEEP is defined.266 */267 if (timeout <= ABIT_UGURU_WAIT_TIMEOUT_SLEEP)268 msleep(0);269 }270 return 0;271}272 273/* Put the uguru in ready for input state */274static int abituguru_ready(struct abituguru_data *data)275{276 int timeout = ABIT_UGURU_READY_TIMEOUT;277 278 if (data->uguru_ready)279 return 0;280 281 /* Reset? / Prepare for next read/write cycle */282 outb(0x00, data->addr + ABIT_UGURU_DATA);283 284 /* Wait till the uguru is ready */285 if (abituguru_wait(data, ABIT_UGURU_STATUS_READY)) {286 ABIT_UGURU_DEBUG(1,287 "timeout exceeded waiting for ready state\n");288 return -EIO;289 }290 291 /* Cmd port MUST be read now and should contain 0xAC */292 while (inb_p(data->addr + ABIT_UGURU_CMD) != 0xAC) {293 timeout--;294 if (timeout == 0) {295 ABIT_UGURU_DEBUG(1,296 "CMD reg does not hold 0xAC after ready command\n");297 return -EIO;298 }299 msleep(0);300 }301 302 /*303 * After this the ABIT_UGURU_DATA port should contain304 * ABIT_UGURU_STATUS_INPUT305 */306 timeout = ABIT_UGURU_READY_TIMEOUT;307 while (inb_p(data->addr + ABIT_UGURU_DATA) != ABIT_UGURU_STATUS_INPUT) {308 timeout--;309 if (timeout == 0) {310 ABIT_UGURU_DEBUG(1,311 "state != more input after ready command\n");312 return -EIO;313 }314 msleep(0);315 }316 317 data->uguru_ready = 1;318 return 0;319}320 321/*322 * Send the bank and then sensor address to the uGuru for the next read/write323 * cycle. This function gets called as the first part of a read/write by324 * abituguru_read and abituguru_write. This function should never be325 * called by any other function.326 */327static int abituguru_send_address(struct abituguru_data *data,328 u8 bank_addr, u8 sensor_addr, int retries)329{330 /*331 * assume the caller does error handling itself if it has not requested332 * any retries, and thus be quiet.333 */334 int report_errors = retries;335 336 for (;;) {337 /*338 * Make sure the uguru is ready and then send the bank address,339 * after this the uguru is no longer "ready".340 */341 if (abituguru_ready(data) != 0)342 return -EIO;343 outb(bank_addr, data->addr + ABIT_UGURU_DATA);344 data->uguru_ready = 0;345 346 /*347 * Wait till the uguru is ABIT_UGURU_STATUS_INPUT state again348 * and send the sensor addr349 */350 if (abituguru_wait(data, ABIT_UGURU_STATUS_INPUT)) {351 if (retries) {352 ABIT_UGURU_DEBUG(3, "timeout exceeded "353 "waiting for more input state, %d "354 "tries remaining\n", retries);355 set_current_state(TASK_UNINTERRUPTIBLE);356 schedule_timeout(ABIT_UGURU_RETRY_DELAY);357 retries--;358 continue;359 }360 if (report_errors)361 ABIT_UGURU_DEBUG(1, "timeout exceeded "362 "waiting for more input state "363 "(bank: %d)\n", (int)bank_addr);364 return -EBUSY;365 }366 outb(sensor_addr, data->addr + ABIT_UGURU_CMD);367 return 0;368 }369}370 371/*372 * Read count bytes from sensor sensor_addr in bank bank_addr and store the373 * result in buf, retry the send address part of the read retries times.374 */375static int abituguru_read(struct abituguru_data *data,376 u8 bank_addr, u8 sensor_addr, u8 *buf, int count, int retries)377{378 int i;379 380 /* Send the address */381 i = abituguru_send_address(data, bank_addr, sensor_addr, retries);382 if (i)383 return i;384 385 /* And read the data */386 for (i = 0; i < count; i++) {387 if (abituguru_wait(data, ABIT_UGURU_STATUS_READ)) {388 ABIT_UGURU_DEBUG(retries ? 1 : 3,389 "timeout exceeded waiting for "390 "read state (bank: %d, sensor: %d)\n",391 (int)bank_addr, (int)sensor_addr);392 break;393 }394 buf[i] = inb(data->addr + ABIT_UGURU_CMD);395 }396 397 /* Last put the chip back in ready state */398 abituguru_ready(data);399 400 return i;401}402 403/*404 * Write count bytes from buf to sensor sensor_addr in bank bank_addr, the send405 * address part of the write is always retried ABIT_UGURU_MAX_RETRIES times.406 */407static int abituguru_write(struct abituguru_data *data,408 u8 bank_addr, u8 sensor_addr, u8 *buf, int count)409{410 /*411 * We use the ready timeout as we have to wait for 0xAC just like the412 * ready function413 */414 int i, timeout = ABIT_UGURU_READY_TIMEOUT;415 416 /* Send the address */417 i = abituguru_send_address(data, bank_addr, sensor_addr,418 ABIT_UGURU_MAX_RETRIES);419 if (i)420 return i;421 422 /* And write the data */423 for (i = 0; i < count; i++) {424 if (abituguru_wait(data, ABIT_UGURU_STATUS_WRITE)) {425 ABIT_UGURU_DEBUG(1, "timeout exceeded waiting for "426 "write state (bank: %d, sensor: %d)\n",427 (int)bank_addr, (int)sensor_addr);428 break;429 }430 outb(buf[i], data->addr + ABIT_UGURU_CMD);431 }432 433 /*434 * Now we need to wait till the chip is ready to be read again,435 * so that we can read 0xAC as confirmation that our write has436 * succeeded.437 */438 if (abituguru_wait(data, ABIT_UGURU_STATUS_READ)) {439 ABIT_UGURU_DEBUG(1, "timeout exceeded waiting for read state "440 "after write (bank: %d, sensor: %d)\n", (int)bank_addr,441 (int)sensor_addr);442 return -EIO;443 }444 445 /* Cmd port MUST be read now and should contain 0xAC */446 while (inb_p(data->addr + ABIT_UGURU_CMD) != 0xAC) {447 timeout--;448 if (timeout == 0) {449 ABIT_UGURU_DEBUG(1, "CMD reg does not hold 0xAC after "450 "write (bank: %d, sensor: %d)\n",451 (int)bank_addr, (int)sensor_addr);452 return -EIO;453 }454 msleep(0);455 }456 457 /* Last put the chip back in ready state */458 abituguru_ready(data);459 460 return i;461}462 463/*464 * Detect sensor type. Temp and Volt sensors are enabled with465 * different masks and will ignore enable masks not meant for them.466 * This enables us to test what kind of sensor we're dealing with.467 * By setting the alarm thresholds so that we will always get an468 * alarm for sensor type X and then enabling the sensor as sensor type469 * X, if we then get an alarm it is a sensor of type X.470 */471static int472abituguru_detect_bank1_sensor_type(struct abituguru_data *data,473 u8 sensor_addr)474{475 u8 val, test_flag, buf[3];476 int i, ret = -ENODEV; /* error is the most common used retval :| */477 478 /* If overriden by the user return the user selected type */479 if (bank1_types[sensor_addr] >= ABIT_UGURU_IN_SENSOR &&480 bank1_types[sensor_addr] <= ABIT_UGURU_NC) {481 ABIT_UGURU_DEBUG(2, "assuming sensor type %d for bank1 sensor "482 "%d because of \"bank1_types\" module param\n",483 bank1_types[sensor_addr], (int)sensor_addr);484 return bank1_types[sensor_addr];485 }486 487 /* First read the sensor and the current settings */488 if (abituguru_read(data, ABIT_UGURU_SENSOR_BANK1, sensor_addr, &val,489 1, ABIT_UGURU_MAX_RETRIES) != 1)490 return -ENODEV;491 492 /* Test val is sane / usable for sensor type detection. */493 if ((val < 10u) || (val > 250u)) {494 pr_warn("bank1-sensor: %d reading (%d) too close to limits, "495 "unable to determine sensor type, skipping sensor\n",496 (int)sensor_addr, (int)val);497 /*498 * assume no sensor is there for sensors for which we can't499 * determine the sensor type because their reading is too close500 * to their limits, this usually means no sensor is there.501 */502 return ABIT_UGURU_NC;503 }504 505 ABIT_UGURU_DEBUG(2, "testing bank1 sensor %d\n", (int)sensor_addr);506 /*507 * Volt sensor test, enable volt low alarm, set min value ridiculously508 * high, or vica versa if the reading is very high. If its a volt509 * sensor this should always give us an alarm.510 */511 if (val <= 240u) {512 buf[0] = ABIT_UGURU_VOLT_LOW_ALARM_ENABLE;513 buf[1] = 245;514 buf[2] = 250;515 test_flag = ABIT_UGURU_VOLT_LOW_ALARM_FLAG;516 } else {517 buf[0] = ABIT_UGURU_VOLT_HIGH_ALARM_ENABLE;518 buf[1] = 5;519 buf[2] = 10;520 test_flag = ABIT_UGURU_VOLT_HIGH_ALARM_FLAG;521 }522 523 if (abituguru_write(data, ABIT_UGURU_SENSOR_BANK1 + 2, sensor_addr,524 buf, 3) != 3)525 goto abituguru_detect_bank1_sensor_type_exit;526 /*527 * Now we need 20 ms to give the uguru time to read the sensors528 * and raise a voltage alarm529 */530 set_current_state(TASK_UNINTERRUPTIBLE);531 schedule_timeout(HZ/50);532 /* Check for alarm and check the alarm is a volt low alarm. */533 if (abituguru_read(data, ABIT_UGURU_ALARM_BANK, 0, buf, 3,534 ABIT_UGURU_MAX_RETRIES) != 3)535 goto abituguru_detect_bank1_sensor_type_exit;536 if (buf[sensor_addr/8] & (0x01 << (sensor_addr % 8))) {537 if (abituguru_read(data, ABIT_UGURU_SENSOR_BANK1 + 1,538 sensor_addr, buf, 3,539 ABIT_UGURU_MAX_RETRIES) != 3)540 goto abituguru_detect_bank1_sensor_type_exit;541 if (buf[0] & test_flag) {542 ABIT_UGURU_DEBUG(2, " found volt sensor\n");543 ret = ABIT_UGURU_IN_SENSOR;544 goto abituguru_detect_bank1_sensor_type_exit;545 } else546 ABIT_UGURU_DEBUG(2, " alarm raised during volt "547 "sensor test, but volt range flag not set\n");548 } else549 ABIT_UGURU_DEBUG(2, " alarm not raised during volt sensor "550 "test\n");551 552 /*553 * Temp sensor test, enable sensor as a temp sensor, set beep value554 * ridiculously low (but not too low, otherwise uguru ignores it).555 * If its a temp sensor this should always give us an alarm.556 */557 buf[0] = ABIT_UGURU_TEMP_HIGH_ALARM_ENABLE;558 buf[1] = 5;559 buf[2] = 10;560 if (abituguru_write(data, ABIT_UGURU_SENSOR_BANK1 + 2, sensor_addr,561 buf, 3) != 3)562 goto abituguru_detect_bank1_sensor_type_exit;563 /*564 * Now we need 50 ms to give the uguru time to read the sensors565 * and raise a temp alarm566 */567 set_current_state(TASK_UNINTERRUPTIBLE);568 schedule_timeout(HZ/20);569 /* Check for alarm and check the alarm is a temp high alarm. */570 if (abituguru_read(data, ABIT_UGURU_ALARM_BANK, 0, buf, 3,571 ABIT_UGURU_MAX_RETRIES) != 3)572 goto abituguru_detect_bank1_sensor_type_exit;573 if (buf[sensor_addr/8] & (0x01 << (sensor_addr % 8))) {574 if (abituguru_read(data, ABIT_UGURU_SENSOR_BANK1 + 1,575 sensor_addr, buf, 3,576 ABIT_UGURU_MAX_RETRIES) != 3)577 goto abituguru_detect_bank1_sensor_type_exit;578 if (buf[0] & ABIT_UGURU_TEMP_HIGH_ALARM_FLAG) {579 ABIT_UGURU_DEBUG(2, " found temp sensor\n");580 ret = ABIT_UGURU_TEMP_SENSOR;581 goto abituguru_detect_bank1_sensor_type_exit;582 } else583 ABIT_UGURU_DEBUG(2, " alarm raised during temp "584 "sensor test, but temp high flag not set\n");585 } else586 ABIT_UGURU_DEBUG(2, " alarm not raised during temp sensor "587 "test\n");588 589 ret = ABIT_UGURU_NC;590abituguru_detect_bank1_sensor_type_exit:591 /*592 * Restore original settings, failing here is really BAD, it has been593 * reported that some BIOS-es hang when entering the uGuru menu with594 * invalid settings present in the uGuru, so we try this 3 times.595 */596 for (i = 0; i < 3; i++)597 if (abituguru_write(data, ABIT_UGURU_SENSOR_BANK1 + 2,598 sensor_addr, data->bank1_settings[sensor_addr],599 3) == 3)600 break;601 if (i == 3) {602 pr_err("Fatal error could not restore original settings. %s %s\n",603 never_happen, report_this);604 return -ENODEV;605 }606 return ret;607}608 609/*610 * These functions try to find out how many sensors there are in bank2 and how611 * many pwms there are. The purpose of this is to make sure that we don't give612 * the user the possibility to change settings for non-existent sensors / pwm.613 * The uGuru will happily read / write whatever memory happens to be after the614 * memory storing the PWM settings when reading/writing to a PWM which is not615 * there. Notice even if we detect a PWM which doesn't exist we normally won't616 * write to it, unless the user tries to change the settings.617 *618 * Although the uGuru allows reading (settings) from non existing bank2619 * sensors, my version of the uGuru does seem to stop writing to them, the620 * write function above aborts in this case with:621 * "CMD reg does not hold 0xAC after write"622 *623 * Notice these 2 tests are non destructive iow read-only tests, otherwise624 * they would defeat their purpose. Although for the bank2_sensors detection a625 * read/write test would be feasible because of the reaction above, I've626 * however opted to stay on the safe side.627 */628static void629abituguru_detect_no_bank2_sensors(struct abituguru_data *data)630{631 int i;632 633 if (fan_sensors > 0 && fan_sensors <= ABIT_UGURU_MAX_BANK2_SENSORS) {634 data->bank2_sensors = fan_sensors;635 ABIT_UGURU_DEBUG(2, "assuming %d fan sensors because of "636 "\"fan_sensors\" module param\n",637 (int)data->bank2_sensors);638 return;639 }640 641 ABIT_UGURU_DEBUG(2, "detecting number of fan sensors\n");642 for (i = 0; i < ABIT_UGURU_MAX_BANK2_SENSORS; i++) {643 /*644 * 0x89 are the known used bits:645 * -0x80 enable shutdown646 * -0x08 enable beep647 * -0x01 enable alarm648 * All other bits should be 0, but on some motherboards649 * 0x40 (bit 6) is also high for some of the fans??650 */651 if (data->bank2_settings[i][0] & ~0xC9) {652 ABIT_UGURU_DEBUG(2, " bank2 sensor %d does not seem "653 "to be a fan sensor: settings[0] = %02X\n",654 i, (unsigned int)data->bank2_settings[i][0]);655 break;656 }657 658 /* check if the threshold is within the allowed range */659 if (data->bank2_settings[i][1] <660 abituguru_bank2_min_threshold) {661 ABIT_UGURU_DEBUG(2, " bank2 sensor %d does not seem "662 "to be a fan sensor: the threshold (%d) is "663 "below the minimum (%d)\n", i,664 (int)data->bank2_settings[i][1],665 (int)abituguru_bank2_min_threshold);666 break;667 }668 if (data->bank2_settings[i][1] >669 abituguru_bank2_max_threshold) {670 ABIT_UGURU_DEBUG(2, " bank2 sensor %d does not seem "671 "to be a fan sensor: the threshold (%d) is "672 "above the maximum (%d)\n", i,673 (int)data->bank2_settings[i][1],674 (int)abituguru_bank2_max_threshold);675 break;676 }677 }678 679 data->bank2_sensors = i;680 ABIT_UGURU_DEBUG(2, " found: %d fan sensors\n",681 (int)data->bank2_sensors);682}683 684static void685abituguru_detect_no_pwms(struct abituguru_data *data)686{687 int i, j;688 689 if (pwms > 0 && pwms <= ABIT_UGURU_MAX_PWMS) {690 data->pwms = pwms;691 ABIT_UGURU_DEBUG(2, "assuming %d PWM outputs because of "692 "\"pwms\" module param\n", (int)data->pwms);693 return;694 }695 696 ABIT_UGURU_DEBUG(2, "detecting number of PWM outputs\n");697 for (i = 0; i < ABIT_UGURU_MAX_PWMS; i++) {698 /*699 * 0x80 is the enable bit and the low700 * nibble is which temp sensor to use,701 * the other bits should be 0702 */703 if (data->pwm_settings[i][0] & ~0x8F) {704 ABIT_UGURU_DEBUG(2, " pwm channel %d does not seem "705 "to be a pwm channel: settings[0] = %02X\n",706 i, (unsigned int)data->pwm_settings[i][0]);707 break;708 }709 710 /*711 * the low nibble must correspond to one of the temp sensors712 * we've found713 */714 for (j = 0; j < data->bank1_sensors[ABIT_UGURU_TEMP_SENSOR];715 j++) {716 if (data->bank1_address[ABIT_UGURU_TEMP_SENSOR][j] ==717 (data->pwm_settings[i][0] & 0x0F))718 break;719 }720 if (j == data->bank1_sensors[ABIT_UGURU_TEMP_SENSOR]) {721 ABIT_UGURU_DEBUG(2, " pwm channel %d does not seem "722 "to be a pwm channel: %d is not a valid temp "723 "sensor address\n", i,724 data->pwm_settings[i][0] & 0x0F);725 break;726 }727 728 /* check if all other settings are within the allowed range */729 for (j = 1; j < 5; j++) {730 u8 min;731 /* special case pwm1 min pwm% */732 if ((i == 0) && ((j == 1) || (j == 2)))733 min = 77;734 else735 min = abituguru_pwm_min[j];736 if (data->pwm_settings[i][j] < min) {737 ABIT_UGURU_DEBUG(2, " pwm channel %d does "738 "not seem to be a pwm channel: "739 "setting %d (%d) is below the minimum "740 "value (%d)\n", i, j,741 (int)data->pwm_settings[i][j],742 (int)min);743 goto abituguru_detect_no_pwms_exit;744 }745 if (data->pwm_settings[i][j] > abituguru_pwm_max[j]) {746 ABIT_UGURU_DEBUG(2, " pwm channel %d does "747 "not seem to be a pwm channel: "748 "setting %d (%d) is above the maximum "749 "value (%d)\n", i, j,750 (int)data->pwm_settings[i][j],751 (int)abituguru_pwm_max[j]);752 goto abituguru_detect_no_pwms_exit;753 }754 }755 756 /* check that min temp < max temp and min pwm < max pwm */757 if (data->pwm_settings[i][1] >= data->pwm_settings[i][2]) {758 ABIT_UGURU_DEBUG(2, " pwm channel %d does not seem "759 "to be a pwm channel: min pwm (%d) >= "760 "max pwm (%d)\n", i,761 (int)data->pwm_settings[i][1],762 (int)data->pwm_settings[i][2]);763 break;764 }765 if (data->pwm_settings[i][3] >= data->pwm_settings[i][4]) {766 ABIT_UGURU_DEBUG(2, " pwm channel %d does not seem "767 "to be a pwm channel: min temp (%d) >= "768 "max temp (%d)\n", i,769 (int)data->pwm_settings[i][3],770 (int)data->pwm_settings[i][4]);771 break;772 }773 }774 775abituguru_detect_no_pwms_exit:776 data->pwms = i;777 ABIT_UGURU_DEBUG(2, " found: %d PWM outputs\n", (int)data->pwms);778}779 780/*781 * Following are the sysfs callback functions. These functions expect:782 * sensor_device_attribute_2->index: sensor address/offset in the bank783 * sensor_device_attribute_2->nr: register offset, bitmask or NA.784 */785static struct abituguru_data *abituguru_update_device(struct device *dev);786 787static ssize_t show_bank1_value(struct device *dev,788 struct device_attribute *devattr, char *buf)789{790 struct sensor_device_attribute_2 *attr = to_sensor_dev_attr_2(devattr);791 struct abituguru_data *data = abituguru_update_device(dev);792 if (!data)793 return -EIO;794 return sprintf(buf, "%d\n", (data->bank1_value[attr->index] *795 data->bank1_max_value[attr->index] + 128) / 255);796}797 798static ssize_t show_bank1_setting(struct device *dev,799 struct device_attribute *devattr, char *buf)800{801 struct sensor_device_attribute_2 *attr = to_sensor_dev_attr_2(devattr);802 struct abituguru_data *data = dev_get_drvdata(dev);803 return sprintf(buf, "%d\n",804 (data->bank1_settings[attr->index][attr->nr] *805 data->bank1_max_value[attr->index] + 128) / 255);806}807 808static ssize_t show_bank2_value(struct device *dev,809 struct device_attribute *devattr, char *buf)810{811 struct sensor_device_attribute_2 *attr = to_sensor_dev_attr_2(devattr);812 struct abituguru_data *data = abituguru_update_device(dev);813 if (!data)814 return -EIO;815 return sprintf(buf, "%d\n", (data->bank2_value[attr->index] *816 ABIT_UGURU_FAN_MAX + 128) / 255);817}818 819static ssize_t show_bank2_setting(struct device *dev,820 struct device_attribute *devattr, char *buf)821{822 struct sensor_device_attribute_2 *attr = to_sensor_dev_attr_2(devattr);823 struct abituguru_data *data = dev_get_drvdata(dev);824 return sprintf(buf, "%d\n",825 (data->bank2_settings[attr->index][attr->nr] *826 ABIT_UGURU_FAN_MAX + 128) / 255);827}828 829static ssize_t store_bank1_setting(struct device *dev, struct device_attribute830 *devattr, const char *buf, size_t count)831{832 struct sensor_device_attribute_2 *attr = to_sensor_dev_attr_2(devattr);833 struct abituguru_data *data = dev_get_drvdata(dev);834 unsigned long val;835 ssize_t ret;836 837 ret = kstrtoul(buf, 10, &val);838 if (ret)839 return ret;840 841 ret = count;842 val = (val * 255 + data->bank1_max_value[attr->index] / 2) /843 data->bank1_max_value[attr->index];844 if (val > 255)845 return -EINVAL;846 847 mutex_lock(&data->update_lock);848 if (data->bank1_settings[attr->index][attr->nr] != val) {849 u8 orig_val = data->bank1_settings[attr->index][attr->nr];850 data->bank1_settings[attr->index][attr->nr] = val;851 if (abituguru_write(data, ABIT_UGURU_SENSOR_BANK1 + 2,852 attr->index, data->bank1_settings[attr->index],853 3) <= attr->nr) {854 data->bank1_settings[attr->index][attr->nr] = orig_val;855 ret = -EIO;856 }857 }858 mutex_unlock(&data->update_lock);859 return ret;860}861 862static ssize_t store_bank2_setting(struct device *dev, struct device_attribute863 *devattr, const char *buf, size_t count)864{865 struct sensor_device_attribute_2 *attr = to_sensor_dev_attr_2(devattr);866 struct abituguru_data *data = dev_get_drvdata(dev);867 unsigned long val;868 ssize_t ret;869 870 ret = kstrtoul(buf, 10, &val);871 if (ret)872 return ret;873 874 ret = count;875 val = (val * 255 + ABIT_UGURU_FAN_MAX / 2) / ABIT_UGURU_FAN_MAX;876 877 /* this check can be done before taking the lock */878 if (val < abituguru_bank2_min_threshold ||879 val > abituguru_bank2_max_threshold)880 return -EINVAL;881 882 mutex_lock(&data->update_lock);883 if (data->bank2_settings[attr->index][attr->nr] != val) {884 u8 orig_val = data->bank2_settings[attr->index][attr->nr];885 data->bank2_settings[attr->index][attr->nr] = val;886 if (abituguru_write(data, ABIT_UGURU_SENSOR_BANK2 + 2,887 attr->index, data->bank2_settings[attr->index],888 2) <= attr->nr) {889 data->bank2_settings[attr->index][attr->nr] = orig_val;890 ret = -EIO;891 }892 }893 mutex_unlock(&data->update_lock);894 return ret;895}896 897static ssize_t show_bank1_alarm(struct device *dev,898 struct device_attribute *devattr, char *buf)899{900 struct sensor_device_attribute_2 *attr = to_sensor_dev_attr_2(devattr);901 struct abituguru_data *data = abituguru_update_device(dev);902 if (!data)903 return -EIO;904 /*905 * See if the alarm bit for this sensor is set, and if the906 * alarm matches the type of alarm we're looking for (for volt907 * it can be either low or high). The type is stored in a few908 * readonly bits in the settings part of the relevant sensor.909 * The bitmask of the type is passed to us in attr->nr.910 */911 if ((data->alarms[attr->index / 8] & (0x01 << (attr->index % 8))) &&912 (data->bank1_settings[attr->index][0] & attr->nr))913 return sprintf(buf, "1\n");914 else915 return sprintf(buf, "0\n");916}917 918static ssize_t show_bank2_alarm(struct device *dev,919 struct device_attribute *devattr, char *buf)920{921 struct sensor_device_attribute_2 *attr = to_sensor_dev_attr_2(devattr);922 struct abituguru_data *data = abituguru_update_device(dev);923 if (!data)924 return -EIO;925 if (data->alarms[2] & (0x01 << attr->index))926 return sprintf(buf, "1\n");927 else928 return sprintf(buf, "0\n");929}930 931static ssize_t show_bank1_mask(struct device *dev,932 struct device_attribute *devattr, char *buf)933{934 struct sensor_device_attribute_2 *attr = to_sensor_dev_attr_2(devattr);935 struct abituguru_data *data = dev_get_drvdata(dev);936 if (data->bank1_settings[attr->index][0] & attr->nr)937 return sprintf(buf, "1\n");938 else939 return sprintf(buf, "0\n");940}941 942static ssize_t show_bank2_mask(struct device *dev,943 struct device_attribute *devattr, char *buf)944{945 struct sensor_device_attribute_2 *attr = to_sensor_dev_attr_2(devattr);946 struct abituguru_data *data = dev_get_drvdata(dev);947 if (data->bank2_settings[attr->index][0] & attr->nr)948 return sprintf(buf, "1\n");949 else950 return sprintf(buf, "0\n");951}952 953static ssize_t store_bank1_mask(struct device *dev,954 struct device_attribute *devattr, const char *buf, size_t count)955{956 struct sensor_device_attribute_2 *attr = to_sensor_dev_attr_2(devattr);957 struct abituguru_data *data = dev_get_drvdata(dev);958 ssize_t ret;959 u8 orig_val;960 unsigned long mask;961 962 ret = kstrtoul(buf, 10, &mask);963 if (ret)964 return ret;965 966 ret = count;967 mutex_lock(&data->update_lock);968 orig_val = data->bank1_settings[attr->index][0];969 970 if (mask)971 data->bank1_settings[attr->index][0] |= attr->nr;972 else973 data->bank1_settings[attr->index][0] &= ~attr->nr;974 975 if ((data->bank1_settings[attr->index][0] != orig_val) &&976 (abituguru_write(data,977 ABIT_UGURU_SENSOR_BANK1 + 2, attr->index,978 data->bank1_settings[attr->index], 3) < 1)) {979 data->bank1_settings[attr->index][0] = orig_val;980 ret = -EIO;981 }982 mutex_unlock(&data->update_lock);983 return ret;984}985 986static ssize_t store_bank2_mask(struct device *dev,987 struct device_attribute *devattr, const char *buf, size_t count)988{989 struct sensor_device_attribute_2 *attr = to_sensor_dev_attr_2(devattr);990 struct abituguru_data *data = dev_get_drvdata(dev);991 ssize_t ret;992 u8 orig_val;993 unsigned long mask;994 995 ret = kstrtoul(buf, 10, &mask);996 if (ret)997 return ret;998 999 ret = count;1000 mutex_lock(&data->update_lock);1001 orig_val = data->bank2_settings[attr->index][0];1002 1003 if (mask)1004 data->bank2_settings[attr->index][0] |= attr->nr;1005 else1006 data->bank2_settings[attr->index][0] &= ~attr->nr;1007 1008 if ((data->bank2_settings[attr->index][0] != orig_val) &&1009 (abituguru_write(data,1010 ABIT_UGURU_SENSOR_BANK2 + 2, attr->index,1011 data->bank2_settings[attr->index], 2) < 1)) {1012 data->bank2_settings[attr->index][0] = orig_val;1013 ret = -EIO;1014 }1015 mutex_unlock(&data->update_lock);1016 return ret;1017}1018 1019/* Fan PWM (speed control) */1020static ssize_t show_pwm_setting(struct device *dev,1021 struct device_attribute *devattr, char *buf)1022{1023 struct sensor_device_attribute_2 *attr = to_sensor_dev_attr_2(devattr);1024 struct abituguru_data *data = dev_get_drvdata(dev);1025 return sprintf(buf, "%d\n", data->pwm_settings[attr->index][attr->nr] *1026 abituguru_pwm_settings_multiplier[attr->nr]);1027}1028 1029static ssize_t store_pwm_setting(struct device *dev, struct device_attribute1030 *devattr, const char *buf, size_t count)1031{1032 struct sensor_device_attribute_2 *attr = to_sensor_dev_attr_2(devattr);1033 struct abituguru_data *data = dev_get_drvdata(dev);1034 u8 min;1035 unsigned long val;1036 ssize_t ret;1037 1038 ret = kstrtoul(buf, 10, &val);1039 if (ret)1040 return ret;1041 1042 ret = count;1043 val = (val + abituguru_pwm_settings_multiplier[attr->nr] / 2) /1044 abituguru_pwm_settings_multiplier[attr->nr];1045 1046 /* special case pwm1 min pwm% */1047 if ((attr->index == 0) && ((attr->nr == 1) || (attr->nr == 2)))1048 min = 77;1049 else1050 min = abituguru_pwm_min[attr->nr];1051 1052 /* this check can be done before taking the lock */1053 if (val < min || val > abituguru_pwm_max[attr->nr])1054 return -EINVAL;1055 1056 mutex_lock(&data->update_lock);1057 /* this check needs to be done after taking the lock */1058 if ((attr->nr & 1) &&1059 (val >= data->pwm_settings[attr->index][attr->nr + 1]))1060 ret = -EINVAL;1061 else if (!(attr->nr & 1) &&1062 (val <= data->pwm_settings[attr->index][attr->nr - 1]))1063 ret = -EINVAL;1064 else if (data->pwm_settings[attr->index][attr->nr] != val) {1065 u8 orig_val = data->pwm_settings[attr->index][attr->nr];1066 data->pwm_settings[attr->index][attr->nr] = val;1067 if (abituguru_write(data, ABIT_UGURU_FAN_PWM + 1,1068 attr->index, data->pwm_settings[attr->index],1069 5) <= attr->nr) {1070 data->pwm_settings[attr->index][attr->nr] =1071 orig_val;1072 ret = -EIO;1073 }1074 }1075 mutex_unlock(&data->update_lock);1076 return ret;1077}1078 1079static ssize_t show_pwm_sensor(struct device *dev,1080 struct device_attribute *devattr, char *buf)1081{1082 struct sensor_device_attribute_2 *attr = to_sensor_dev_attr_2(devattr);1083 struct abituguru_data *data = dev_get_drvdata(dev);1084 int i;1085 /*1086 * We need to walk to the temp sensor addresses to find what1087 * the userspace id of the configured temp sensor is.1088 */1089 for (i = 0; i < data->bank1_sensors[ABIT_UGURU_TEMP_SENSOR]; i++)1090 if (data->bank1_address[ABIT_UGURU_TEMP_SENSOR][i] ==1091 (data->pwm_settings[attr->index][0] & 0x0F))1092 return sprintf(buf, "%d\n", i+1);1093 1094 return -ENXIO;1095}1096 1097static ssize_t store_pwm_sensor(struct device *dev, struct device_attribute1098 *devattr, const char *buf, size_t count)1099{1100 struct sensor_device_attribute_2 *attr = to_sensor_dev_attr_2(devattr);1101 struct abituguru_data *data = dev_get_drvdata(dev);1102 ssize_t ret;1103 unsigned long val;1104 u8 orig_val;1105 u8 address;1106 1107 ret = kstrtoul(buf, 10, &val);1108 if (ret)1109 return ret;1110 1111 if (val == 0 || val > data->bank1_sensors[ABIT_UGURU_TEMP_SENSOR])1112 return -EINVAL;1113 1114 val -= 1;1115 ret = count;1116 mutex_lock(&data->update_lock);1117 orig_val = data->pwm_settings[attr->index][0];1118 address = data->bank1_address[ABIT_UGURU_TEMP_SENSOR][val];1119 data->pwm_settings[attr->index][0] &= 0xF0;1120 data->pwm_settings[attr->index][0] |= address;1121 if (data->pwm_settings[attr->index][0] != orig_val) {1122 if (abituguru_write(data, ABIT_UGURU_FAN_PWM + 1, attr->index,1123 data->pwm_settings[attr->index], 5) < 1) {1124 data->pwm_settings[attr->index][0] = orig_val;1125 ret = -EIO;1126 }1127 }1128 mutex_unlock(&data->update_lock);1129 return ret;1130}1131 1132static ssize_t show_pwm_enable(struct device *dev,1133 struct device_attribute *devattr, char *buf)1134{1135 struct sensor_device_attribute_2 *attr = to_sensor_dev_attr_2(devattr);1136 struct abituguru_data *data = dev_get_drvdata(dev);1137 int res = 0;1138 if (data->pwm_settings[attr->index][0] & ABIT_UGURU_FAN_PWM_ENABLE)1139 res = 2;1140 return sprintf(buf, "%d\n", res);1141}1142 1143static ssize_t store_pwm_enable(struct device *dev, struct device_attribute1144 *devattr, const char *buf, size_t count)1145{1146 struct sensor_device_attribute_2 *attr = to_sensor_dev_attr_2(devattr);1147 struct abituguru_data *data = dev_get_drvdata(dev);1148 u8 orig_val;1149 ssize_t ret;1150 unsigned long user_val;1151 1152 ret = kstrtoul(buf, 10, &user_val);1153 if (ret)1154 return ret;1155 1156 ret = count;1157 mutex_lock(&data->update_lock);1158 orig_val = data->pwm_settings[attr->index][0];1159 switch (user_val) {1160 case 0:1161 data->pwm_settings[attr->index][0] &=1162 ~ABIT_UGURU_FAN_PWM_ENABLE;1163 break;1164 case 2:1165 data->pwm_settings[attr->index][0] |= ABIT_UGURU_FAN_PWM_ENABLE;1166 break;1167 default:1168 ret = -EINVAL;1169 }1170 if ((data->pwm_settings[attr->index][0] != orig_val) &&1171 (abituguru_write(data, ABIT_UGURU_FAN_PWM + 1,1172 attr->index, data->pwm_settings[attr->index],1173 5) < 1)) {1174 data->pwm_settings[attr->index][0] = orig_val;1175 ret = -EIO;1176 }1177 mutex_unlock(&data->update_lock);1178 return ret;1179}1180 1181static ssize_t show_name(struct device *dev,1182 struct device_attribute *devattr, char *buf)1183{1184 return sprintf(buf, "%s\n", ABIT_UGURU_NAME);1185}1186 1187/* Sysfs attr templates, the real entries are generated automatically. */1188static const1189struct sensor_device_attribute_2 abituguru_sysfs_bank1_templ[2][9] = {1190 {1191 SENSOR_ATTR_2(in%d_input, 0444, show_bank1_value, NULL, 0, 0),1192 SENSOR_ATTR_2(in%d_min, 0644, show_bank1_setting,1193 store_bank1_setting, 1, 0),1194 SENSOR_ATTR_2(in%d_min_alarm, 0444, show_bank1_alarm, NULL,1195 ABIT_UGURU_VOLT_LOW_ALARM_FLAG, 0),1196 SENSOR_ATTR_2(in%d_max, 0644, show_bank1_setting,1197 store_bank1_setting, 2, 0),1198 SENSOR_ATTR_2(in%d_max_alarm, 0444, show_bank1_alarm, NULL,1199 ABIT_UGURU_VOLT_HIGH_ALARM_FLAG, 0),1200 SENSOR_ATTR_2(in%d_beep, 0644, show_bank1_mask,1201 store_bank1_mask, ABIT_UGURU_BEEP_ENABLE, 0),1202 SENSOR_ATTR_2(in%d_shutdown, 0644, show_bank1_mask,1203 store_bank1_mask, ABIT_UGURU_SHUTDOWN_ENABLE, 0),1204 SENSOR_ATTR_2(in%d_min_alarm_enable, 0644, show_bank1_mask,1205 store_bank1_mask, ABIT_UGURU_VOLT_LOW_ALARM_ENABLE, 0),1206 SENSOR_ATTR_2(in%d_max_alarm_enable, 0644, show_bank1_mask,1207 store_bank1_mask, ABIT_UGURU_VOLT_HIGH_ALARM_ENABLE, 0),1208 }, {1209 SENSOR_ATTR_2(temp%d_input, 0444, show_bank1_value, NULL, 0, 0),1210 SENSOR_ATTR_2(temp%d_alarm, 0444, show_bank1_alarm, NULL,1211 ABIT_UGURU_TEMP_HIGH_ALARM_FLAG, 0),1212 SENSOR_ATTR_2(temp%d_max, 0644, show_bank1_setting,1213 store_bank1_setting, 1, 0),1214 SENSOR_ATTR_2(temp%d_crit, 0644, show_bank1_setting,1215 store_bank1_setting, 2, 0),1216 SENSOR_ATTR_2(temp%d_beep, 0644, show_bank1_mask,1217 store_bank1_mask, ABIT_UGURU_BEEP_ENABLE, 0),1218 SENSOR_ATTR_2(temp%d_shutdown, 0644, show_bank1_mask,1219 store_bank1_mask, ABIT_UGURU_SHUTDOWN_ENABLE, 0),1220 SENSOR_ATTR_2(temp%d_alarm_enable, 0644, show_bank1_mask,1221 store_bank1_mask, ABIT_UGURU_TEMP_HIGH_ALARM_ENABLE, 0),1222 }1223};1224 1225static const struct sensor_device_attribute_2 abituguru_sysfs_fan_templ[6] = {1226 SENSOR_ATTR_2(fan%d_input, 0444, show_bank2_value, NULL, 0, 0),1227 SENSOR_ATTR_2(fan%d_alarm, 0444, show_bank2_alarm, NULL, 0, 0),1228 SENSOR_ATTR_2(fan%d_min, 0644, show_bank2_setting,1229 store_bank2_setting, 1, 0),1230 SENSOR_ATTR_2(fan%d_beep, 0644, show_bank2_mask,1231 store_bank2_mask, ABIT_UGURU_BEEP_ENABLE, 0),1232 SENSOR_ATTR_2(fan%d_shutdown, 0644, show_bank2_mask,1233 store_bank2_mask, ABIT_UGURU_SHUTDOWN_ENABLE, 0),1234 SENSOR_ATTR_2(fan%d_alarm_enable, 0644, show_bank2_mask,1235 store_bank2_mask, ABIT_UGURU_FAN_LOW_ALARM_ENABLE, 0),1236};1237 1238static const struct sensor_device_attribute_2 abituguru_sysfs_pwm_templ[6] = {1239 SENSOR_ATTR_2(pwm%d_enable, 0644, show_pwm_enable,1240 store_pwm_enable, 0, 0),1241 SENSOR_ATTR_2(pwm%d_auto_channels_temp, 0644, show_pwm_sensor,1242 store_pwm_sensor, 0, 0),1243 SENSOR_ATTR_2(pwm%d_auto_point1_pwm, 0644, show_pwm_setting,1244 store_pwm_setting, 1, 0),1245 SENSOR_ATTR_2(pwm%d_auto_point2_pwm, 0644, show_pwm_setting,1246 store_pwm_setting, 2, 0),1247 SENSOR_ATTR_2(pwm%d_auto_point1_temp, 0644, show_pwm_setting,1248 store_pwm_setting, 3, 0),1249 SENSOR_ATTR_2(pwm%d_auto_point2_temp, 0644, show_pwm_setting,1250 store_pwm_setting, 4, 0),1251};1252 1253static struct sensor_device_attribute_2 abituguru_sysfs_attr[] = {1254 SENSOR_ATTR_2(name, 0444, show_name, NULL, 0, 0),1255};1256 1257static int abituguru_probe(struct platform_device *pdev)1258{1259 struct abituguru_data *data;1260 int i, j, used, sysfs_names_free, sysfs_attr_i, res = -ENODEV;1261 char *sysfs_filename;1262 1263 /*1264 * El weirdo probe order, to keep the sysfs order identical to the1265 * BIOS and window-appliction listing order.1266 */1267 static const u8 probe_order[ABIT_UGURU_MAX_BANK1_SENSORS] = {1268 0x00, 0x01, 0x03, 0x04, 0x0A, 0x08, 0x0E, 0x02,1269 0x09, 0x06, 0x05, 0x0B, 0x0F, 0x0D, 0x07, 0x0C };1270 1271 data = devm_kzalloc(&pdev->dev, sizeof(struct abituguru_data),1272 GFP_KERNEL);1273 if (!data)1274 return -ENOMEM;1275 1276 data->addr = platform_get_resource(pdev, IORESOURCE_IO, 0)->start;1277 mutex_init(&data->update_lock);1278 platform_set_drvdata(pdev, data);1279 1280 /* See if the uGuru is ready */1281 if (inb_p(data->addr + ABIT_UGURU_DATA) == ABIT_UGURU_STATUS_INPUT)1282 data->uguru_ready = 1;1283 1284 /*1285 * Completely read the uGuru this has 2 purposes:1286 * - testread / see if one really is there.1287 * - make an in memory copy of all the uguru settings for future use.1288 */1289 if (abituguru_read(data, ABIT_UGURU_ALARM_BANK, 0,1290 data->alarms, 3, ABIT_UGURU_MAX_RETRIES) != 3)1291 goto abituguru_probe_error;1292 1293 for (i = 0; i < ABIT_UGURU_MAX_BANK1_SENSORS; i++) {1294 if (abituguru_read(data, ABIT_UGURU_SENSOR_BANK1, i,1295 &data->bank1_value[i], 1,1296 ABIT_UGURU_MAX_RETRIES) != 1)1297 goto abituguru_probe_error;1298 if (abituguru_read(data, ABIT_UGURU_SENSOR_BANK1+1, i,1299 data->bank1_settings[i], 3,1300 ABIT_UGURU_MAX_RETRIES) != 3)1301 goto abituguru_probe_error;1302 }1303 /*1304 * Note: We don't know how many bank2 sensors / pwms there really are,1305 * but in order to "detect" this we need to read the maximum amount1306 * anyways. If we read sensors/pwms not there we'll just read crap1307 * this can't hurt. We need the detection because we don't want1308 * unwanted writes, which will hurt!1309 */1310 for (i = 0; i < ABIT_UGURU_MAX_BANK2_SENSORS; i++) {1311 if (abituguru_read(data, ABIT_UGURU_SENSOR_BANK2, i,1312 &data->bank2_value[i], 1,1313 ABIT_UGURU_MAX_RETRIES) != 1)1314 goto abituguru_probe_error;1315 if (abituguru_read(data, ABIT_UGURU_SENSOR_BANK2+1, i,1316 data->bank2_settings[i], 2,1317 ABIT_UGURU_MAX_RETRIES) != 2)1318 goto abituguru_probe_error;1319 }1320 for (i = 0; i < ABIT_UGURU_MAX_PWMS; i++) {1321 if (abituguru_read(data, ABIT_UGURU_FAN_PWM, i,1322 data->pwm_settings[i], 5,1323 ABIT_UGURU_MAX_RETRIES) != 5)1324 goto abituguru_probe_error;1325 }1326 data->last_updated = jiffies;1327 1328 /* Detect sensor types and fill the sysfs attr for bank1 */1329 sysfs_attr_i = 0;1330 sysfs_filename = data->sysfs_names;1331 sysfs_names_free = ABITUGURU_SYSFS_NAMES_LENGTH;1332 for (i = 0; i < ABIT_UGURU_MAX_BANK1_SENSORS; i++) {1333 res = abituguru_detect_bank1_sensor_type(data, probe_order[i]);1334 if (res < 0)1335 goto abituguru_probe_error;1336 if (res == ABIT_UGURU_NC)1337 continue;1338 1339 /* res 1 (temp) sensors have 7 sysfs entries, 0 (in) 9 */1340 for (j = 0; j < (res ? 7 : 9); j++) {1341 used = snprintf(sysfs_filename, sysfs_names_free,1342 abituguru_sysfs_bank1_templ[res][j].dev_attr.1343 attr.name, data->bank1_sensors[res] + res)1344 + 1;1345 data->sysfs_attr[sysfs_attr_i] =1346 abituguru_sysfs_bank1_templ[res][j];1347 data->sysfs_attr[sysfs_attr_i].dev_attr.attr.name =1348 sysfs_filename;1349 data->sysfs_attr[sysfs_attr_i].index = probe_order[i];1350 sysfs_filename += used;1351 sysfs_names_free -= used;1352 sysfs_attr_i++;1353 }1354 data->bank1_max_value[probe_order[i]] =1355 abituguru_bank1_max_value[res];1356 data->bank1_address[res][data->bank1_sensors[res]] =1357 probe_order[i];1358 data->bank1_sensors[res]++;1359 }1360 /* Detect number of sensors and fill the sysfs attr for bank2 (fans) */1361 abituguru_detect_no_bank2_sensors(data);1362 for (i = 0; i < data->bank2_sensors; i++) {1363 for (j = 0; j < ARRAY_SIZE(abituguru_sysfs_fan_templ); j++) {1364 used = snprintf(sysfs_filename, sysfs_names_free,1365 abituguru_sysfs_fan_templ[j].dev_attr.attr.name,1366 i + 1) + 1;1367 data->sysfs_attr[sysfs_attr_i] =1368 abituguru_sysfs_fan_templ[j];1369 data->sysfs_attr[sysfs_attr_i].dev_attr.attr.name =1370 sysfs_filename;1371 data->sysfs_attr[sysfs_attr_i].index = i;1372 sysfs_filename += used;1373 sysfs_names_free -= used;1374 sysfs_attr_i++;1375 }1376 }1377 /* Detect number of sensors and fill the sysfs attr for pwms */1378 abituguru_detect_no_pwms(data);1379 for (i = 0; i < data->pwms; i++) {1380 for (j = 0; j < ARRAY_SIZE(abituguru_sysfs_pwm_templ); j++) {1381 used = snprintf(sysfs_filename, sysfs_names_free,1382 abituguru_sysfs_pwm_templ[j].dev_attr.attr.name,1383 i + 1) + 1;1384 data->sysfs_attr[sysfs_attr_i] =1385 abituguru_sysfs_pwm_templ[j];1386 data->sysfs_attr[sysfs_attr_i].dev_attr.attr.name =1387 sysfs_filename;1388 data->sysfs_attr[sysfs_attr_i].index = i;1389 sysfs_filename += used;1390 sysfs_names_free -= used;1391 sysfs_attr_i++;1392 }1393 }1394 /* Fail safe check, this should never happen! */1395 if (sysfs_names_free < 0) {1396 pr_err("Fatal error ran out of space for sysfs attr names. %s %s",1397 never_happen, report_this);1398 res = -ENAMETOOLONG;1399 goto abituguru_probe_error;1400 }1401 pr_info("found Abit uGuru\n");1402 1403 /* Register sysfs hooks */1404 for (i = 0; i < sysfs_attr_i; i++) {1405 res = device_create_file(&pdev->dev,1406 &data->sysfs_attr[i].dev_attr);1407 if (res)1408 goto abituguru_probe_error;1409 }1410 for (i = 0; i < ARRAY_SIZE(abituguru_sysfs_attr); i++) {1411 res = device_create_file(&pdev->dev,1412 &abituguru_sysfs_attr[i].dev_attr);1413 if (res)1414 goto abituguru_probe_error;1415 }1416 1417 data->hwmon_dev = hwmon_device_register(&pdev->dev);1418 if (!IS_ERR(data->hwmon_dev))1419 return 0; /* success */1420 1421 res = PTR_ERR(data->hwmon_dev);1422abituguru_probe_error:1423 for (i = 0; data->sysfs_attr[i].dev_attr.attr.name; i++)1424 device_remove_file(&pdev->dev, &data->sysfs_attr[i].dev_attr);1425 for (i = 0; i < ARRAY_SIZE(abituguru_sysfs_attr); i++)1426 device_remove_file(&pdev->dev,1427 &abituguru_sysfs_attr[i].dev_attr);1428 return res;1429}1430 1431static void abituguru_remove(struct platform_device *pdev)1432{1433 int i;1434 struct abituguru_data *data = platform_get_drvdata(pdev);1435 1436 hwmon_device_unregister(data->hwmon_dev);1437 for (i = 0; data->sysfs_attr[i].dev_attr.attr.name; i++)1438 device_remove_file(&pdev->dev, &data->sysfs_attr[i].dev_attr);1439 for (i = 0; i < ARRAY_SIZE(abituguru_sysfs_attr); i++)1440 device_remove_file(&pdev->dev,1441 &abituguru_sysfs_attr[i].dev_attr);1442}1443 1444static struct abituguru_data *abituguru_update_device(struct device *dev)1445{1446 int i, err;1447 struct abituguru_data *data = dev_get_drvdata(dev);1448 /* fake a complete successful read if no update necessary. */1449 char success = 1;1450 1451 mutex_lock(&data->update_lock);1452 if (time_after(jiffies, data->last_updated + HZ)) {1453 success = 0;1454 err = abituguru_read(data, ABIT_UGURU_ALARM_BANK, 0,1455 data->alarms, 3, 0);1456 if (err != 3)1457 goto LEAVE_UPDATE;1458 for (i = 0; i < ABIT_UGURU_MAX_BANK1_SENSORS; i++) {1459 err = abituguru_read(data, ABIT_UGURU_SENSOR_BANK1,1460 i, &data->bank1_value[i], 1, 0);1461 if (err != 1)1462 goto LEAVE_UPDATE;1463 err = abituguru_read(data, ABIT_UGURU_SENSOR_BANK1 + 1,1464 i, data->bank1_settings[i], 3, 0);1465 if (err != 3)1466 goto LEAVE_UPDATE;1467 }1468 for (i = 0; i < data->bank2_sensors; i++) {1469 err = abituguru_read(data, ABIT_UGURU_SENSOR_BANK2, i,1470 &data->bank2_value[i], 1, 0);1471 if (err != 1)1472 goto LEAVE_UPDATE;1473 }1474 /* success! */1475 success = 1;1476 data->update_timeouts = 0;1477LEAVE_UPDATE:1478 /* handle timeout condition */1479 if (!success && (err == -EBUSY || err >= 0)) {1480 /* No overflow please */1481 if (data->update_timeouts < 255u)1482 data->update_timeouts++;1483 if (data->update_timeouts <= ABIT_UGURU_MAX_TIMEOUTS) {1484 ABIT_UGURU_DEBUG(3, "timeout exceeded, will "1485 "try again next update\n");1486 /* Just a timeout, fake a successful read */1487 success = 1;1488 } else1489 ABIT_UGURU_DEBUG(1, "timeout exceeded %d "1490 "times waiting for more input state\n",1491 (int)data->update_timeouts);1492 }1493 /* On success set last_updated */1494 if (success)1495 data->last_updated = jiffies;1496 }1497 mutex_unlock(&data->update_lock);1498 1499 if (success)1500 return data;1501 else1502 return NULL;1503}1504 1505static int abituguru_suspend(struct device *dev)1506{1507 struct abituguru_data *data = dev_get_drvdata(dev);1508 /*1509 * make sure all communications with the uguru are done and no new1510 * ones are started1511 */1512 mutex_lock(&data->update_lock);1513 return 0;1514}1515 1516static int abituguru_resume(struct device *dev)1517{1518 struct abituguru_data *data = dev_get_drvdata(dev);1519 /* See if the uGuru is still ready */1520 if (inb_p(data->addr + ABIT_UGURU_DATA) != ABIT_UGURU_STATUS_INPUT)1521 data->uguru_ready = 0;1522 mutex_unlock(&data->update_lock);1523 return 0;1524}1525 1526static DEFINE_SIMPLE_DEV_PM_OPS(abituguru_pm, abituguru_suspend, abituguru_resume);1527 1528static struct platform_driver abituguru_driver = {1529 .driver = {1530 .name = ABIT_UGURU_NAME,1531 .pm = pm_sleep_ptr(&abituguru_pm),1532 },1533 .probe = abituguru_probe,1534 .remove_new = abituguru_remove,1535};1536 1537static int __init abituguru_detect(void)1538{1539 /*1540 * See if there is an uguru there. After a reboot uGuru will hold 0x001541 * at DATA and 0xAC, when this driver has already been loaded once1542 * DATA will hold 0x08. For most uGuru's CMD will hold 0xAC in either1543 * scenario but some will hold 0x00.1544 * Some uGuru's initially hold 0x09 at DATA and will only hold 0x081545 * after reading CMD first, so CMD must be read first!1546 */1547 u8 cmd_val = inb_p(ABIT_UGURU_BASE + ABIT_UGURU_CMD);1548 u8 data_val = inb_p(ABIT_UGURU_BASE + ABIT_UGURU_DATA);1549 if (((data_val == 0x00) || (data_val == 0x08)) &&1550 ((cmd_val == 0x00) || (cmd_val == 0xAC)))1551 return ABIT_UGURU_BASE;1552 1553 ABIT_UGURU_DEBUG(2, "no Abit uGuru found, data = 0x%02X, cmd = "1554 "0x%02X\n", (unsigned int)data_val, (unsigned int)cmd_val);1555 1556 if (force) {1557 pr_info("Assuming Abit uGuru is present because of \"force\" parameter\n");1558 return ABIT_UGURU_BASE;1559 }1560 1561 /* No uGuru found */1562 return -ENODEV;1563}1564 1565static struct platform_device *abituguru_pdev;1566 1567static int __init abituguru_init(void)1568{1569 int address, err;1570 struct resource res = { .flags = IORESOURCE_IO };1571 const char *board_vendor = dmi_get_system_info(DMI_BOARD_VENDOR);1572 1573 /* safety check, refuse to load on non Abit motherboards */1574 if (!force && (!board_vendor ||1575 strcmp(board_vendor, "http://www.abit.com.tw/")))1576 return -ENODEV;1577 1578 address = abituguru_detect();1579 if (address < 0)1580 return address;1581 1582 err = platform_driver_register(&abituguru_driver);1583 if (err)1584 goto exit;1585 1586 abituguru_pdev = platform_device_alloc(ABIT_UGURU_NAME, address);1587 if (!abituguru_pdev) {1588 pr_err("Device allocation failed\n");1589 err = -ENOMEM;1590 goto exit_driver_unregister;1591 }1592 1593 res.start = address;1594 res.end = address + ABIT_UGURU_REGION_LENGTH - 1;1595 res.name = ABIT_UGURU_NAME;1596 1597 err = platform_device_add_resources(abituguru_pdev, &res, 1);1598 if (err) {1599 pr_err("Device resource addition failed (%d)\n", err);1600 goto exit_device_put;1601 }1602 1603 err = platform_device_add(abituguru_pdev);1604 if (err) {1605 pr_err("Device addition failed (%d)\n", err);1606 goto exit_device_put;1607 }1608 1609 return 0;1610 1611exit_device_put:1612 platform_device_put(abituguru_pdev);1613exit_driver_unregister:1614 platform_driver_unregister(&abituguru_driver);1615exit:1616 return err;1617}1618 1619static void __exit abituguru_exit(void)1620{1621 platform_device_unregister(abituguru_pdev);1622 platform_driver_unregister(&abituguru_driver);1623}1624 1625MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>");1626MODULE_DESCRIPTION("Abit uGuru Sensor device");1627MODULE_LICENSE("GPL");1628 1629module_init(abituguru_init);1630module_exit(abituguru_exit);1631