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1// SPDX-License-Identifier: GPL-2.0-or-later2/***************************************************************************3 * Copyright (C) 2011-2012 Hans de Goede <hdegoede@redhat.com> *4 * *5 ***************************************************************************/6 7#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt8 9#include <linux/module.h>10#include <linux/mod_devicetable.h>11#include <linux/init.h>12#include <linux/slab.h>13#include <linux/jiffies.h>14#include <linux/platform_device.h>15#include <linux/hwmon.h>16#include <linux/hwmon-sysfs.h>17#include <linux/err.h>18#include <linux/mutex.h>19#include "sch56xx-common.h"20 21#define DRVNAME "sch5636"22#define DEVNAME "theseus" /* We only support one model for now */23 24#define SCH5636_REG_FUJITSU_ID 0x78025#define SCH5636_REG_FUJITSU_REV 0x78326 27#define SCH5636_NO_INS 528#define SCH5636_NO_TEMPS 1629#define SCH5636_NO_FANS 830 31static const u16 SCH5636_REG_IN_VAL[SCH5636_NO_INS] = {32 0x22, 0x23, 0x24, 0x25, 0x189 };33static const u16 SCH5636_REG_IN_FACTORS[SCH5636_NO_INS] = {34 4400, 1500, 4000, 4400, 16000 };35static const char * const SCH5636_IN_LABELS[SCH5636_NO_INS] = {36 "3.3V", "VREF", "VBAT", "3.3AUX", "12V" };37 38static const u16 SCH5636_REG_TEMP_VAL[SCH5636_NO_TEMPS] = {39 0x2B, 0x26, 0x27, 0x28, 0x29, 0x2A, 0x180, 0x181,40 0x85, 0x86, 0x87, 0x88, 0x89, 0x8A, 0x8B, 0x8C };41#define SCH5636_REG_TEMP_CTRL(i) (0x790 + (i))42#define SCH5636_TEMP_WORKING 0x0143#define SCH5636_TEMP_ALARM 0x0244#define SCH5636_TEMP_DEACTIVATED 0x8045 46static const u16 SCH5636_REG_FAN_VAL[SCH5636_NO_FANS] = {47 0x2C, 0x2E, 0x30, 0x32, 0x62, 0x64, 0x66, 0x68 };48#define SCH5636_REG_FAN_CTRL(i) (0x880 + (i))49/* FAULT in datasheet, but acts as an alarm */50#define SCH5636_FAN_ALARM 0x0451#define SCH5636_FAN_NOT_PRESENT 0x0852#define SCH5636_FAN_DEACTIVATED 0x8053 54 55struct sch5636_data {56 unsigned short addr;57 struct device *hwmon_dev;58 59 struct mutex update_lock;60 bool valid; /* true if following fields are valid */61 unsigned long last_updated; /* In jiffies */62 u8 in[SCH5636_NO_INS];63 u8 temp_val[SCH5636_NO_TEMPS];64 u8 temp_ctrl[SCH5636_NO_TEMPS];65 u16 fan_val[SCH5636_NO_FANS];66 u8 fan_ctrl[SCH5636_NO_FANS];67};68 69static struct sch5636_data *sch5636_update_device(struct device *dev)70{71 struct sch5636_data *data = dev_get_drvdata(dev);72 struct sch5636_data *ret = data;73 int i, val;74 75 mutex_lock(&data->update_lock);76 77 /* Cache the values for 1 second */78 if (data->valid && !time_after(jiffies, data->last_updated + HZ))79 goto abort;80 81 for (i = 0; i < SCH5636_NO_INS; i++) {82 val = sch56xx_read_virtual_reg(data->addr,83 SCH5636_REG_IN_VAL[i]);84 if (unlikely(val < 0)) {85 ret = ERR_PTR(val);86 goto abort;87 }88 data->in[i] = val;89 }90 91 for (i = 0; i < SCH5636_NO_TEMPS; i++) {92 if (data->temp_ctrl[i] & SCH5636_TEMP_DEACTIVATED)93 continue;94 95 val = sch56xx_read_virtual_reg(data->addr,96 SCH5636_REG_TEMP_VAL[i]);97 if (unlikely(val < 0)) {98 ret = ERR_PTR(val);99 goto abort;100 }101 data->temp_val[i] = val;102 103 val = sch56xx_read_virtual_reg(data->addr,104 SCH5636_REG_TEMP_CTRL(i));105 if (unlikely(val < 0)) {106 ret = ERR_PTR(val);107 goto abort;108 }109 data->temp_ctrl[i] = val;110 /* Alarms need to be explicitly write-cleared */111 if (val & SCH5636_TEMP_ALARM) {112 sch56xx_write_virtual_reg(data->addr,113 SCH5636_REG_TEMP_CTRL(i), val);114 }115 }116 117 for (i = 0; i < SCH5636_NO_FANS; i++) {118 if (data->fan_ctrl[i] & SCH5636_FAN_DEACTIVATED)119 continue;120 121 val = sch56xx_read_virtual_reg16(data->addr,122 SCH5636_REG_FAN_VAL[i]);123 if (unlikely(val < 0)) {124 ret = ERR_PTR(val);125 goto abort;126 }127 data->fan_val[i] = val;128 129 val = sch56xx_read_virtual_reg(data->addr,130 SCH5636_REG_FAN_CTRL(i));131 if (unlikely(val < 0)) {132 ret = ERR_PTR(val);133 goto abort;134 }135 data->fan_ctrl[i] = val;136 /* Alarms need to be explicitly write-cleared */137 if (val & SCH5636_FAN_ALARM) {138 sch56xx_write_virtual_reg(data->addr,139 SCH5636_REG_FAN_CTRL(i), val);140 }141 }142 143 data->last_updated = jiffies;144 data->valid = true;145abort:146 mutex_unlock(&data->update_lock);147 return ret;148}149 150static int reg_to_rpm(u16 reg)151{152 if (reg == 0)153 return -EIO;154 if (reg == 0xffff)155 return 0;156 157 return 5400540 / reg;158}159 160static ssize_t name_show(struct device *dev, struct device_attribute *devattr,161 char *buf)162{163 return sysfs_emit(buf, "%s\n", DEVNAME);164}165 166static ssize_t in_value_show(struct device *dev,167 struct device_attribute *devattr, char *buf)168{169 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);170 struct sch5636_data *data = sch5636_update_device(dev);171 int val;172 173 if (IS_ERR(data))174 return PTR_ERR(data);175 176 val = DIV_ROUND_CLOSEST(177 data->in[attr->index] * SCH5636_REG_IN_FACTORS[attr->index],178 255);179 return sysfs_emit(buf, "%d\n", val);180}181 182static ssize_t in_label_show(struct device *dev,183 struct device_attribute *devattr, char *buf)184{185 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);186 187 return sysfs_emit(buf, "%s\n",188 SCH5636_IN_LABELS[attr->index]);189}190 191static ssize_t temp_value_show(struct device *dev,192 struct device_attribute *devattr, char *buf)193{194 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);195 struct sch5636_data *data = sch5636_update_device(dev);196 int val;197 198 if (IS_ERR(data))199 return PTR_ERR(data);200 201 val = (data->temp_val[attr->index] - 64) * 1000;202 return sysfs_emit(buf, "%d\n", val);203}204 205static ssize_t temp_fault_show(struct device *dev,206 struct device_attribute *devattr, char *buf)207{208 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);209 struct sch5636_data *data = sch5636_update_device(dev);210 int val;211 212 if (IS_ERR(data))213 return PTR_ERR(data);214 215 val = (data->temp_ctrl[attr->index] & SCH5636_TEMP_WORKING) ? 0 : 1;216 return sysfs_emit(buf, "%d\n", val);217}218 219static ssize_t temp_alarm_show(struct device *dev,220 struct device_attribute *devattr, char *buf)221{222 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);223 struct sch5636_data *data = sch5636_update_device(dev);224 int val;225 226 if (IS_ERR(data))227 return PTR_ERR(data);228 229 val = (data->temp_ctrl[attr->index] & SCH5636_TEMP_ALARM) ? 1 : 0;230 return sysfs_emit(buf, "%d\n", val);231}232 233static ssize_t fan_value_show(struct device *dev,234 struct device_attribute *devattr, char *buf)235{236 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);237 struct sch5636_data *data = sch5636_update_device(dev);238 int val;239 240 if (IS_ERR(data))241 return PTR_ERR(data);242 243 val = reg_to_rpm(data->fan_val[attr->index]);244 if (val < 0)245 return val;246 247 return sysfs_emit(buf, "%d\n", val);248}249 250static ssize_t fan_fault_show(struct device *dev,251 struct device_attribute *devattr, char *buf)252{253 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);254 struct sch5636_data *data = sch5636_update_device(dev);255 int val;256 257 if (IS_ERR(data))258 return PTR_ERR(data);259 260 val = (data->fan_ctrl[attr->index] & SCH5636_FAN_NOT_PRESENT) ? 1 : 0;261 return sysfs_emit(buf, "%d\n", val);262}263 264static ssize_t fan_alarm_show(struct device *dev,265 struct device_attribute *devattr, char *buf)266{267 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);268 struct sch5636_data *data = sch5636_update_device(dev);269 int val;270 271 if (IS_ERR(data))272 return PTR_ERR(data);273 274 val = (data->fan_ctrl[attr->index] & SCH5636_FAN_ALARM) ? 1 : 0;275 return sysfs_emit(buf, "%d\n", val);276}277 278static struct sensor_device_attribute sch5636_attr[] = {279 SENSOR_ATTR_RO(name, name, 0),280 SENSOR_ATTR_RO(in0_input, in_value, 0),281 SENSOR_ATTR_RO(in0_label, in_label, 0),282 SENSOR_ATTR_RO(in1_input, in_value, 1),283 SENSOR_ATTR_RO(in1_label, in_label, 1),284 SENSOR_ATTR_RO(in2_input, in_value, 2),285 SENSOR_ATTR_RO(in2_label, in_label, 2),286 SENSOR_ATTR_RO(in3_input, in_value, 3),287 SENSOR_ATTR_RO(in3_label, in_label, 3),288 SENSOR_ATTR_RO(in4_input, in_value, 4),289 SENSOR_ATTR_RO(in4_label, in_label, 4),290};291 292static struct sensor_device_attribute sch5636_temp_attr[] = {293 SENSOR_ATTR_RO(temp1_input, temp_value, 0),294 SENSOR_ATTR_RO(temp1_fault, temp_fault, 0),295 SENSOR_ATTR_RO(temp1_alarm, temp_alarm, 0),296 SENSOR_ATTR_RO(temp2_input, temp_value, 1),297 SENSOR_ATTR_RO(temp2_fault, temp_fault, 1),298 SENSOR_ATTR_RO(temp2_alarm, temp_alarm, 1),299 SENSOR_ATTR_RO(temp3_input, temp_value, 2),300 SENSOR_ATTR_RO(temp3_fault, temp_fault, 2),301 SENSOR_ATTR_RO(temp3_alarm, temp_alarm, 2),302 SENSOR_ATTR_RO(temp4_input, temp_value, 3),303 SENSOR_ATTR_RO(temp4_fault, temp_fault, 3),304 SENSOR_ATTR_RO(temp4_alarm, temp_alarm, 3),305 SENSOR_ATTR_RO(temp5_input, temp_value, 4),306 SENSOR_ATTR_RO(temp5_fault, temp_fault, 4),307 SENSOR_ATTR_RO(temp5_alarm, temp_alarm, 4),308 SENSOR_ATTR_RO(temp6_input, temp_value, 5),309 SENSOR_ATTR_RO(temp6_fault, temp_fault, 5),310 SENSOR_ATTR_RO(temp6_alarm, temp_alarm, 5),311 SENSOR_ATTR_RO(temp7_input, temp_value, 6),312 SENSOR_ATTR_RO(temp7_fault, temp_fault, 6),313 SENSOR_ATTR_RO(temp7_alarm, temp_alarm, 6),314 SENSOR_ATTR_RO(temp8_input, temp_value, 7),315 SENSOR_ATTR_RO(temp8_fault, temp_fault, 7),316 SENSOR_ATTR_RO(temp8_alarm, temp_alarm, 7),317 SENSOR_ATTR_RO(temp9_input, temp_value, 8),318 SENSOR_ATTR_RO(temp9_fault, temp_fault, 8),319 SENSOR_ATTR_RO(temp9_alarm, temp_alarm, 8),320 SENSOR_ATTR_RO(temp10_input, temp_value, 9),321 SENSOR_ATTR_RO(temp10_fault, temp_fault, 9),322 SENSOR_ATTR_RO(temp10_alarm, temp_alarm, 9),323 SENSOR_ATTR_RO(temp11_input, temp_value, 10),324 SENSOR_ATTR_RO(temp11_fault, temp_fault, 10),325 SENSOR_ATTR_RO(temp11_alarm, temp_alarm, 10),326 SENSOR_ATTR_RO(temp12_input, temp_value, 11),327 SENSOR_ATTR_RO(temp12_fault, temp_fault, 11),328 SENSOR_ATTR_RO(temp12_alarm, temp_alarm, 11),329 SENSOR_ATTR_RO(temp13_input, temp_value, 12),330 SENSOR_ATTR_RO(temp13_fault, temp_fault, 12),331 SENSOR_ATTR_RO(temp13_alarm, temp_alarm, 12),332 SENSOR_ATTR_RO(temp14_input, temp_value, 13),333 SENSOR_ATTR_RO(temp14_fault, temp_fault, 13),334 SENSOR_ATTR_RO(temp14_alarm, temp_alarm, 13),335 SENSOR_ATTR_RO(temp15_input, temp_value, 14),336 SENSOR_ATTR_RO(temp15_fault, temp_fault, 14),337 SENSOR_ATTR_RO(temp15_alarm, temp_alarm, 14),338 SENSOR_ATTR_RO(temp16_input, temp_value, 15),339 SENSOR_ATTR_RO(temp16_fault, temp_fault, 15),340 SENSOR_ATTR_RO(temp16_alarm, temp_alarm, 15),341};342 343static struct sensor_device_attribute sch5636_fan_attr[] = {344 SENSOR_ATTR_RO(fan1_input, fan_value, 0),345 SENSOR_ATTR_RO(fan1_fault, fan_fault, 0),346 SENSOR_ATTR_RO(fan1_alarm, fan_alarm, 0),347 SENSOR_ATTR_RO(fan2_input, fan_value, 1),348 SENSOR_ATTR_RO(fan2_fault, fan_fault, 1),349 SENSOR_ATTR_RO(fan2_alarm, fan_alarm, 1),350 SENSOR_ATTR_RO(fan3_input, fan_value, 2),351 SENSOR_ATTR_RO(fan3_fault, fan_fault, 2),352 SENSOR_ATTR_RO(fan3_alarm, fan_alarm, 2),353 SENSOR_ATTR_RO(fan4_input, fan_value, 3),354 SENSOR_ATTR_RO(fan4_fault, fan_fault, 3),355 SENSOR_ATTR_RO(fan4_alarm, fan_alarm, 3),356 SENSOR_ATTR_RO(fan5_input, fan_value, 4),357 SENSOR_ATTR_RO(fan5_fault, fan_fault, 4),358 SENSOR_ATTR_RO(fan5_alarm, fan_alarm, 4),359 SENSOR_ATTR_RO(fan6_input, fan_value, 5),360 SENSOR_ATTR_RO(fan6_fault, fan_fault, 5),361 SENSOR_ATTR_RO(fan6_alarm, fan_alarm, 5),362 SENSOR_ATTR_RO(fan7_input, fan_value, 6),363 SENSOR_ATTR_RO(fan7_fault, fan_fault, 6),364 SENSOR_ATTR_RO(fan7_alarm, fan_alarm, 6),365 SENSOR_ATTR_RO(fan8_input, fan_value, 7),366 SENSOR_ATTR_RO(fan8_fault, fan_fault, 7),367 SENSOR_ATTR_RO(fan8_alarm, fan_alarm, 7),368};369 370static void sch5636_remove(struct platform_device *pdev)371{372 struct sch5636_data *data = platform_get_drvdata(pdev);373 int i;374 375 if (data->hwmon_dev)376 hwmon_device_unregister(data->hwmon_dev);377 378 for (i = 0; i < ARRAY_SIZE(sch5636_attr); i++)379 device_remove_file(&pdev->dev, &sch5636_attr[i].dev_attr);380 381 for (i = 0; i < SCH5636_NO_TEMPS * 3; i++)382 device_remove_file(&pdev->dev,383 &sch5636_temp_attr[i].dev_attr);384 385 for (i = 0; i < SCH5636_NO_FANS * 3; i++)386 device_remove_file(&pdev->dev,387 &sch5636_fan_attr[i].dev_attr);388}389 390static int sch5636_probe(struct platform_device *pdev)391{392 struct sch5636_data *data;393 int i, err, val, revision[2];394 char id[4];395 396 data = devm_kzalloc(&pdev->dev, sizeof(struct sch5636_data),397 GFP_KERNEL);398 if (!data)399 return -ENOMEM;400 401 data->addr = platform_get_resource(pdev, IORESOURCE_IO, 0)->start;402 mutex_init(&data->update_lock);403 platform_set_drvdata(pdev, data);404 405 for (i = 0; i < 3; i++) {406 val = sch56xx_read_virtual_reg(data->addr,407 SCH5636_REG_FUJITSU_ID + i);408 if (val < 0) {409 pr_err("Could not read Fujitsu id byte at %#x\n",410 SCH5636_REG_FUJITSU_ID + i);411 err = val;412 goto error;413 }414 id[i] = val;415 }416 id[i] = '\0';417 418 if (strcmp(id, "THS")) {419 pr_err("Unknown Fujitsu id: %3pE (%3ph)\n", id, id);420 err = -ENODEV;421 goto error;422 }423 424 for (i = 0; i < 2; i++) {425 val = sch56xx_read_virtual_reg(data->addr,426 SCH5636_REG_FUJITSU_REV + i);427 if (val < 0) {428 err = val;429 goto error;430 }431 revision[i] = val;432 }433 pr_info("Found %s chip at %#hx, revision: %d.%02d\n", DEVNAME,434 data->addr, revision[0], revision[1]);435 436 /* Read all temp + fan ctrl registers to determine which are active */437 for (i = 0; i < SCH5636_NO_TEMPS; i++) {438 val = sch56xx_read_virtual_reg(data->addr,439 SCH5636_REG_TEMP_CTRL(i));440 if (unlikely(val < 0)) {441 err = val;442 goto error;443 }444 data->temp_ctrl[i] = val;445 }446 447 for (i = 0; i < SCH5636_NO_FANS; i++) {448 val = sch56xx_read_virtual_reg(data->addr,449 SCH5636_REG_FAN_CTRL(i));450 if (unlikely(val < 0)) {451 err = val;452 goto error;453 }454 data->fan_ctrl[i] = val;455 }456 457 for (i = 0; i < ARRAY_SIZE(sch5636_attr); i++) {458 err = device_create_file(&pdev->dev,459 &sch5636_attr[i].dev_attr);460 if (err)461 goto error;462 }463 464 for (i = 0; i < (SCH5636_NO_TEMPS * 3); i++) {465 if (data->temp_ctrl[i/3] & SCH5636_TEMP_DEACTIVATED)466 continue;467 468 err = device_create_file(&pdev->dev,469 &sch5636_temp_attr[i].dev_attr);470 if (err)471 goto error;472 }473 474 for (i = 0; i < (SCH5636_NO_FANS * 3); i++) {475 if (data->fan_ctrl[i/3] & SCH5636_FAN_DEACTIVATED)476 continue;477 478 err = device_create_file(&pdev->dev,479 &sch5636_fan_attr[i].dev_attr);480 if (err)481 goto error;482 }483 484 data->hwmon_dev = hwmon_device_register(&pdev->dev);485 if (IS_ERR(data->hwmon_dev)) {486 err = PTR_ERR(data->hwmon_dev);487 data->hwmon_dev = NULL;488 goto error;489 }490 491 /* Note failing to register the watchdog is not a fatal error */492 sch56xx_watchdog_register(&pdev->dev, data->addr, (revision[0] << 8) | revision[1],493 &data->update_lock, 0);494 495 return 0;496 497error:498 sch5636_remove(pdev);499 return err;500}501 502static const struct platform_device_id sch5636_device_id[] = {503 {504 .name = "sch5636",505 },506 { }507};508MODULE_DEVICE_TABLE(platform, sch5636_device_id);509 510static struct platform_driver sch5636_driver = {511 .driver = {512 .name = DRVNAME,513 },514 .probe = sch5636_probe,515 .remove_new = sch5636_remove,516 .id_table = sch5636_device_id,517};518 519module_platform_driver(sch5636_driver);520 521MODULE_DESCRIPTION("SMSC SCH5636 Hardware Monitoring Driver");522MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>");523MODULE_LICENSE("GPL");524