1// SPDX-License-Identifier: GPL-2.0-or-later 2/* 3 * corsair-psu.c - Linux driver for Corsair power supplies with HID sensors interface 4 * Copyright (C) 2020 Wilken Gottwalt <wilken.gottwalt@posteo.net> 5 */ 6 7#include <linux/completion.h> 8#include <linux/debugfs.h> 9#include <linux/errno.h> 10#include <linux/hid.h> 11#include <linux/hwmon.h> 12#include <linux/hwmon-sysfs.h> 13#include <linux/jiffies.h> 14#include <linux/kernel.h> 15#include <linux/module.h> 16#include <linux/mutex.h> 17#include <linux/slab.h> 18#include <linux/types.h> 19 20/* 21 * Corsair protocol for PSUs 22 * 23 * message size = 64 bytes (request and response, little endian) 24 * request: 25 * [length][command][param0][param1][paramX]... 26 * reply: 27 * [echo of length][echo of command][data0][data1][dataX]... 28 * 29 * - commands are byte sized opcodes 30 * - length is the sum of all bytes of the commands/params 31 * - the micro-controller of most of these PSUs support concatenation in the request and reply, 32 * but it is better to not rely on this (it is also hard to parse) 33 * - the driver uses raw events to be accessible from userspace (though this is not really 34 * supported, it is just there for convenience, may be removed in the future) 35 * - a reply always starts with the length and command in the same order the request used it 36 * - length of the reply data is specific to the command used 37 * - some of the commands work on a rail and can be switched to a specific rail (0 = 12v, 38 * 1 = 5v, 2 = 3.3v) 39 * - the format of the init command 0xFE is swapped length/command bytes 40 * - parameter bytes amount and values are specific to the command (rail setting is the only 41 * one for now that uses non-zero values) 42 * - the driver supports debugfs for values not fitting into the hwmon class 43 * - not every device class (HXi or RMi) supports all commands 44 * - if configured wrong the PSU resets or shuts down, often before actually hitting the 45 * reported critical temperature 46 * - new models like HX1500i Series 2023 have changes in the reported vendor and product 47 * strings, both are slightly longer now, report vendor and product in one string and are 48 * the same now 49 */ 50 51#define DRIVER_NAME "corsair-psu" 52 53#define REPLY_SIZE 24 /* max length of a reply to a single command */ 54#define CMD_BUFFER_SIZE 64 55#define CMD_TIMEOUT_MS 250 56#define SECONDS_PER_HOUR (60 * 60) 57#define SECONDS_PER_DAY (SECONDS_PER_HOUR * 24) 58#define RAIL_COUNT 3 /* 3v3 + 5v + 12v */ 59#define TEMP_COUNT 2 60#define OCP_MULTI_RAIL 0x02 61 62#define PSU_CMD_SELECT_RAIL 0x00 /* expects length 2 */ 63#define PSU_CMD_FAN_PWM 0x3B /* the rest of the commands expect length 3 */ 64#define PSU_CMD_RAIL_VOLTS_HCRIT 0x40 65#define PSU_CMD_RAIL_VOLTS_LCRIT 0x44 66#define PSU_CMD_RAIL_AMPS_HCRIT 0x46 67#define PSU_CMD_TEMP_HCRIT 0x4F 68#define PSU_CMD_IN_VOLTS 0x88 69#define PSU_CMD_IN_AMPS 0x89 70#define PSU_CMD_RAIL_VOLTS 0x8B 71#define PSU_CMD_RAIL_AMPS 0x8C 72#define PSU_CMD_TEMP0 0x8D 73#define PSU_CMD_TEMP1 0x8E 74#define PSU_CMD_FAN 0x90 75#define PSU_CMD_RAIL_WATTS 0x96 76#define PSU_CMD_VEND_STR 0x99 77#define PSU_CMD_PROD_STR 0x9A 78#define PSU_CMD_TOTAL_UPTIME 0xD1 79#define PSU_CMD_UPTIME 0xD2 80#define PSU_CMD_OCPMODE 0xD8 81#define PSU_CMD_TOTAL_WATTS 0xEE 82#define PSU_CMD_FAN_PWM_ENABLE 0xF0 83#define PSU_CMD_INIT 0xFE 84 85#define L_IN_VOLTS "v_in" 86#define L_OUT_VOLTS_12V "v_out +12v" 87#define L_OUT_VOLTS_5V "v_out +5v" 88#define L_OUT_VOLTS_3_3V "v_out +3.3v" 89#define L_IN_AMPS "curr in" 90#define L_AMPS_12V "curr +12v" 91#define L_AMPS_5V "curr +5v" 92#define L_AMPS_3_3V "curr +3.3v" 93#define L_FAN "psu fan" 94#define L_TEMP0 "vrm temp" 95#define L_TEMP1 "case temp" 96#define L_WATTS "power total" 97#define L_WATTS_12V "power +12v" 98#define L_WATTS_5V "power +5v" 99#define L_WATTS_3_3V "power +3.3v" 100 101static const char *const label_watts[] = { 102 L_WATTS, 103 L_WATTS_12V, 104 L_WATTS_5V, 105 L_WATTS_3_3V 106}; 107 108static const char *const label_volts[] = { 109 L_IN_VOLTS, 110 L_OUT_VOLTS_12V, 111 L_OUT_VOLTS_5V, 112 L_OUT_VOLTS_3_3V 113}; 114 115static const char *const label_amps[] = { 116 L_IN_AMPS, 117 L_AMPS_12V, 118 L_AMPS_5V, 119 L_AMPS_3_3V 120}; 121 122struct corsairpsu_data { 123 struct hid_device *hdev; 124 struct device *hwmon_dev; 125 struct dentry *debugfs; 126 struct completion wait_completion; 127 struct mutex lock; /* for locking access to cmd_buffer */ 128 u8 *cmd_buffer; 129 char vendor[REPLY_SIZE]; 130 char product[REPLY_SIZE]; 131 long temp_crit[TEMP_COUNT]; 132 long in_crit[RAIL_COUNT]; 133 long in_lcrit[RAIL_COUNT]; 134 long curr_crit[RAIL_COUNT]; 135 u8 temp_crit_support; 136 u8 in_crit_support; 137 u8 in_lcrit_support; 138 u8 curr_crit_support; 139 bool in_curr_cmd_support; /* not all commands are supported on every PSU */ 140}; 141 142/* some values are SMBus LINEAR11 data which need a conversion */ 143static int corsairpsu_linear11_to_int(const u16 val, const int scale) 144{ 145 const int exp = ((s16)val) >> 11; 146 const int mant = (((s16)(val & 0x7ff)) << 5) >> 5; 147 const int result = mant * scale; 148 149 return (exp >= 0) ? (result << exp) : (result >> -exp); 150} 151 152/* the micro-controller uses percentage values to control pwm */ 153static int corsairpsu_dutycycle_to_pwm(const long dutycycle) 154{ 155 const int result = (256 << 16) / 100; 156 157 return (result * dutycycle) >> 16; 158} 159 160static int corsairpsu_usb_cmd(struct corsairpsu_data *priv, u8 p0, u8 p1, u8 p2, void *data) 161{ 162 unsigned long time; 163 int ret; 164 165 memset(priv->cmd_buffer, 0, CMD_BUFFER_SIZE); 166 priv->cmd_buffer[0] = p0; 167 priv->cmd_buffer[1] = p1; 168 priv->cmd_buffer[2] = p2; 169 170 reinit_completion(&priv->wait_completion); 171 172 ret = hid_hw_output_report(priv->hdev, priv->cmd_buffer, CMD_BUFFER_SIZE); 173 if (ret < 0) 174 return ret; 175 176 time = wait_for_completion_timeout(&priv->wait_completion, 177 msecs_to_jiffies(CMD_TIMEOUT_MS)); 178 if (!time) 179 return -ETIMEDOUT; 180 181 /* 182 * at the start of the reply is an echo of the send command/length in the same order it 183 * was send, not every command is supported on every device class, if a command is not 184 * supported, the length value in the reply is okay, but the command value is set to 0 185 */ 186 if (p0 != priv->cmd_buffer[0] || p1 != priv->cmd_buffer[1]) 187 return -EOPNOTSUPP; 188 189 if (data) 190 memcpy(data, priv->cmd_buffer + 2, REPLY_SIZE); 191 192 return 0; 193} 194 195static int corsairpsu_init(struct corsairpsu_data *priv) 196{ 197 /* 198 * PSU_CMD_INIT uses swapped length/command and expects 2 parameter bytes, this command 199 * actually generates a reply, but we don't need it 200 */ 201 return corsairpsu_usb_cmd(priv, PSU_CMD_INIT, 3, 0, NULL); 202} 203 204static int corsairpsu_fwinfo(struct corsairpsu_data *priv) 205{ 206 int ret; 207 208 ret = corsairpsu_usb_cmd(priv, 3, PSU_CMD_VEND_STR, 0, priv->vendor); 209 if (ret < 0) 210 return ret; 211 212 ret = corsairpsu_usb_cmd(priv, 3, PSU_CMD_PROD_STR, 0, priv->product); 213 if (ret < 0) 214 return ret; 215 216 return 0; 217} 218 219static int corsairpsu_request(struct corsairpsu_data *priv, u8 cmd, u8 rail, void *data) 220{ 221 int ret; 222 223 mutex_lock(&priv->lock); 224 switch (cmd) { 225 case PSU_CMD_RAIL_VOLTS_HCRIT: 226 case PSU_CMD_RAIL_VOLTS_LCRIT: 227 case PSU_CMD_RAIL_AMPS_HCRIT: 228 case PSU_CMD_RAIL_VOLTS: 229 case PSU_CMD_RAIL_AMPS: 230 case PSU_CMD_RAIL_WATTS: 231 ret = corsairpsu_usb_cmd(priv, 2, PSU_CMD_SELECT_RAIL, rail, NULL); 232 if (ret < 0) 233 goto cmd_fail; 234 break; 235 default: 236 break; 237 } 238 239 ret = corsairpsu_usb_cmd(priv, 3, cmd, 0, data); 240 241cmd_fail: 242 mutex_unlock(&priv->lock); 243 return ret; 244} 245 246static int corsairpsu_get_value(struct corsairpsu_data *priv, u8 cmd, u8 rail, long *val) 247{ 248 u8 data[REPLY_SIZE]; 249 long tmp; 250 int ret; 251 252 ret = corsairpsu_request(priv, cmd, rail, data); 253 if (ret < 0) 254 return ret; 255 256 /* 257 * the biggest value here comes from the uptime command and to exceed MAXINT total uptime 258 * needs to be about 68 years, the rest are u16 values and the biggest value coming out of 259 * the LINEAR11 conversion are the watts values which are about 1500 for the strongest psu 260 * supported (HX1500i) 261 */ 262 tmp = ((long)data[3] << 24) + (data[2] << 16) + (data[1] << 8) + data[0]; 263 switch (cmd) { 264 case PSU_CMD_RAIL_VOLTS_HCRIT: 265 case PSU_CMD_RAIL_VOLTS_LCRIT: 266 case PSU_CMD_RAIL_AMPS_HCRIT: 267 case PSU_CMD_TEMP_HCRIT: 268 case PSU_CMD_IN_VOLTS: 269 case PSU_CMD_IN_AMPS: 270 case PSU_CMD_RAIL_VOLTS: 271 case PSU_CMD_RAIL_AMPS: 272 case PSU_CMD_TEMP0: 273 case PSU_CMD_TEMP1: 274 *val = corsairpsu_linear11_to_int(tmp & 0xFFFF, 1000); 275 break; 276 case PSU_CMD_FAN: 277 *val = corsairpsu_linear11_to_int(tmp & 0xFFFF, 1); 278 break; 279 case PSU_CMD_FAN_PWM_ENABLE: 280 *val = corsairpsu_linear11_to_int(tmp & 0xFFFF, 1); 281 /* 282 * 0 = automatic mode, means the micro-controller controls the fan using a plan 283 * which can be modified, but changing this plan is not supported by this 284 * driver, the matching PWM mode is automatic fan speed control = PWM 2 285 * 1 = fixed mode, fan runs at a fixed speed represented by a percentage 286 * value 0-100, this matches the PWM manual fan speed control = PWM 1 287 * technically there is no PWM no fan speed control mode, it would be a combination 288 * of 1 at 100% 289 */ 290 if (*val == 0) 291 *val = 2; 292 break; 293 case PSU_CMD_FAN_PWM: 294 *val = corsairpsu_linear11_to_int(tmp & 0xFFFF, 1); 295 *val = corsairpsu_dutycycle_to_pwm(*val); 296 break; 297 case PSU_CMD_RAIL_WATTS: 298 case PSU_CMD_TOTAL_WATTS: 299 *val = corsairpsu_linear11_to_int(tmp & 0xFFFF, 1000000); 300 break; 301 case PSU_CMD_TOTAL_UPTIME: 302 case PSU_CMD_UPTIME: 303 case PSU_CMD_OCPMODE: 304 *val = tmp; 305 break; 306 default: 307 ret = -EOPNOTSUPP; 308 break; 309 } 310 311 return ret; 312} 313 314static void corsairpsu_get_criticals(struct corsairpsu_data *priv) 315{ 316 long tmp; 317 int rail; 318 319 for (rail = 0; rail < TEMP_COUNT; ++rail) { 320 if (!corsairpsu_get_value(priv, PSU_CMD_TEMP_HCRIT, rail, &tmp)) { 321 priv->temp_crit_support |= BIT(rail); 322 priv->temp_crit[rail] = tmp; 323 } 324 } 325 326 for (rail = 0; rail < RAIL_COUNT; ++rail) { 327 if (!corsairpsu_get_value(priv, PSU_CMD_RAIL_VOLTS_HCRIT, rail, &tmp)) { 328 priv->in_crit_support |= BIT(rail); 329 priv->in_crit[rail] = tmp; 330 } 331 332 if (!corsairpsu_get_value(priv, PSU_CMD_RAIL_VOLTS_LCRIT, rail, &tmp)) { 333 priv->in_lcrit_support |= BIT(rail); 334 priv->in_lcrit[rail] = tmp; 335 } 336 337 if (!corsairpsu_get_value(priv, PSU_CMD_RAIL_AMPS_HCRIT, rail, &tmp)) { 338 priv->curr_crit_support |= BIT(rail); 339 priv->curr_crit[rail] = tmp; 340 } 341 } 342} 343 344static void corsairpsu_check_cmd_support(struct corsairpsu_data *priv) 345{ 346 long tmp; 347 348 priv->in_curr_cmd_support = !corsairpsu_get_value(priv, PSU_CMD_IN_AMPS, 0, &tmp); 349} 350 351static umode_t corsairpsu_hwmon_temp_is_visible(const struct corsairpsu_data *priv, u32 attr, 352 int channel) 353{ 354 umode_t res = 0444; 355 356 switch (attr) { 357 case hwmon_temp_input: 358 case hwmon_temp_label: 359 case hwmon_temp_crit: 360 if (channel > 0 && !(priv->temp_crit_support & BIT(channel - 1))) 361 res = 0; 362 break; 363 default: 364 break; 365 } 366 367 return res; 368} 369 370static umode_t corsairpsu_hwmon_fan_is_visible(const struct corsairpsu_data *priv, u32 attr, 371 int channel) 372{ 373 switch (attr) { 374 case hwmon_fan_input: 375 case hwmon_fan_label: 376 return 0444; 377 default: 378 return 0; 379 } 380} 381 382static umode_t corsairpsu_hwmon_pwm_is_visible(const struct corsairpsu_data *priv, u32 attr, 383 int channel) 384{ 385 switch (attr) { 386 case hwmon_pwm_input: 387 case hwmon_pwm_enable: 388 return 0444; 389 default: 390 return 0; 391 } 392} 393 394static umode_t corsairpsu_hwmon_power_is_visible(const struct corsairpsu_data *priv, u32 attr, 395 int channel) 396{ 397 switch (attr) { 398 case hwmon_power_input: 399 case hwmon_power_label: 400 return 0444; 401 default: 402 return 0; 403 } 404} 405 406static umode_t corsairpsu_hwmon_in_is_visible(const struct corsairpsu_data *priv, u32 attr, 407 int channel) 408{ 409 umode_t res = 0444; 410 411 switch (attr) { 412 case hwmon_in_input: 413 case hwmon_in_label: 414 case hwmon_in_crit: 415 if (channel > 0 && !(priv->in_crit_support & BIT(channel - 1))) 416 res = 0; 417 break; 418 case hwmon_in_lcrit: 419 if (channel > 0 && !(priv->in_lcrit_support & BIT(channel - 1))) 420 res = 0; 421 break; 422 default: 423 break; 424 } 425 426 return res; 427} 428 429static umode_t corsairpsu_hwmon_curr_is_visible(const struct corsairpsu_data *priv, u32 attr, 430 int channel) 431{ 432 umode_t res = 0444; 433 434 switch (attr) { 435 case hwmon_curr_input: 436 if (channel == 0 && !priv->in_curr_cmd_support) 437 res = 0; 438 break; 439 case hwmon_curr_label: 440 case hwmon_curr_crit: 441 if (channel > 0 && !(priv->curr_crit_support & BIT(channel - 1))) 442 res = 0; 443 break; 444 default: 445 break; 446 } 447 448 return res; 449} 450 451static umode_t corsairpsu_hwmon_ops_is_visible(const void *data, enum hwmon_sensor_types type, 452 u32 attr, int channel) 453{ 454 const struct corsairpsu_data *priv = data; 455 456 switch (type) { 457 case hwmon_temp: 458 return corsairpsu_hwmon_temp_is_visible(priv, attr, channel); 459 case hwmon_fan: 460 return corsairpsu_hwmon_fan_is_visible(priv, attr, channel); 461 case hwmon_pwm: 462 return corsairpsu_hwmon_pwm_is_visible(priv, attr, channel); 463 case hwmon_power: 464 return corsairpsu_hwmon_power_is_visible(priv, attr, channel); 465 case hwmon_in: 466 return corsairpsu_hwmon_in_is_visible(priv, attr, channel); 467 case hwmon_curr: 468 return corsairpsu_hwmon_curr_is_visible(priv, attr, channel); 469 default: 470 return 0; 471 } 472} 473 474static int corsairpsu_hwmon_temp_read(struct corsairpsu_data *priv, u32 attr, int channel, 475 long *val) 476{ 477 int err = -EOPNOTSUPP; 478 479 switch (attr) { 480 case hwmon_temp_input: 481 return corsairpsu_get_value(priv, channel ? PSU_CMD_TEMP1 : PSU_CMD_TEMP0, 482 channel, val); 483 case hwmon_temp_crit: 484 *val = priv->temp_crit[channel]; 485 err = 0; 486 break; 487 default: 488 break; 489 } 490 491 return err; 492} 493 494static int corsairpsu_hwmon_pwm_read(struct corsairpsu_data *priv, u32 attr, int channel, long *val) 495{ 496 switch (attr) { 497 case hwmon_pwm_input: 498 return corsairpsu_get_value(priv, PSU_CMD_FAN_PWM, 0, val); 499 case hwmon_pwm_enable: 500 return corsairpsu_get_value(priv, PSU_CMD_FAN_PWM_ENABLE, 0, val); 501 default: 502 break; 503 } 504 505 return -EOPNOTSUPP; 506} 507 508static int corsairpsu_hwmon_power_read(struct corsairpsu_data *priv, u32 attr, int channel, 509 long *val) 510{ 511 if (attr == hwmon_power_input) { 512 switch (channel) { 513 case 0: 514 return corsairpsu_get_value(priv, PSU_CMD_TOTAL_WATTS, 0, val); 515 case 1 ... 3: 516 return corsairpsu_get_value(priv, PSU_CMD_RAIL_WATTS, channel - 1, val); 517 default: 518 break; 519 } 520 } 521 522 return -EOPNOTSUPP; 523} 524 525static int corsairpsu_hwmon_in_read(struct corsairpsu_data *priv, u32 attr, int channel, long *val) 526{ 527 int err = -EOPNOTSUPP; 528 529 switch (attr) { 530 case hwmon_in_input: 531 switch (channel) { 532 case 0: 533 return corsairpsu_get_value(priv, PSU_CMD_IN_VOLTS, 0, val); 534 case 1 ... 3: 535 return corsairpsu_get_value(priv, PSU_CMD_RAIL_VOLTS, channel - 1, val); 536 default: 537 break; 538 } 539 break; 540 case hwmon_in_crit: 541 *val = priv->in_crit[channel - 1]; 542 err = 0; 543 break; 544 case hwmon_in_lcrit: 545 *val = priv->in_lcrit[channel - 1]; 546 err = 0; 547 break; 548 } 549 550 return err; 551} 552 553static int corsairpsu_hwmon_curr_read(struct corsairpsu_data *priv, u32 attr, int channel, 554 long *val) 555{ 556 int err = -EOPNOTSUPP; 557 558 switch (attr) { 559 case hwmon_curr_input: 560 switch (channel) { 561 case 0: 562 return corsairpsu_get_value(priv, PSU_CMD_IN_AMPS, 0, val); 563 case 1 ... 3: 564 return corsairpsu_get_value(priv, PSU_CMD_RAIL_AMPS, channel - 1, val); 565 default: 566 break; 567 } 568 break; 569 case hwmon_curr_crit: 570 *val = priv->curr_crit[channel - 1]; 571 err = 0; 572 break; 573 default: 574 break; 575 } 576 577 return err; 578} 579 580static int corsairpsu_hwmon_ops_read(struct device *dev, enum hwmon_sensor_types type, u32 attr, 581 int channel, long *val) 582{ 583 struct corsairpsu_data *priv = dev_get_drvdata(dev); 584 585 switch (type) { 586 case hwmon_temp: 587 return corsairpsu_hwmon_temp_read(priv, attr, channel, val); 588 case hwmon_fan: 589 if (attr == hwmon_fan_input) 590 return corsairpsu_get_value(priv, PSU_CMD_FAN, 0, val); 591 return -EOPNOTSUPP; 592 case hwmon_pwm: 593 return corsairpsu_hwmon_pwm_read(priv, attr, channel, val); 594 case hwmon_power: 595 return corsairpsu_hwmon_power_read(priv, attr, channel, val); 596 case hwmon_in: 597 return corsairpsu_hwmon_in_read(priv, attr, channel, val); 598 case hwmon_curr: 599 return corsairpsu_hwmon_curr_read(priv, attr, channel, val); 600 default: 601 return -EOPNOTSUPP; 602 } 603} 604 605static int corsairpsu_hwmon_ops_read_string(struct device *dev, enum hwmon_sensor_types type, 606 u32 attr, int channel, const char **str) 607{ 608 if (type == hwmon_temp && attr == hwmon_temp_label) { 609 *str = channel ? L_TEMP1 : L_TEMP0; 610 return 0; 611 } else if (type == hwmon_fan && attr == hwmon_fan_label) { 612 *str = L_FAN; 613 return 0; 614 } else if (type == hwmon_power && attr == hwmon_power_label && channel < 4) { 615 *str = label_watts[channel]; 616 return 0; 617 } else if (type == hwmon_in && attr == hwmon_in_label && channel < 4) { 618 *str = label_volts[channel]; 619 return 0; 620 } else if (type == hwmon_curr && attr == hwmon_curr_label && channel < 4) { 621 *str = label_amps[channel]; 622 return 0; 623 } 624 625 return -EOPNOTSUPP; 626} 627 628static const struct hwmon_ops corsairpsu_hwmon_ops = { 629 .is_visible = corsairpsu_hwmon_ops_is_visible, 630 .read = corsairpsu_hwmon_ops_read, 631 .read_string = corsairpsu_hwmon_ops_read_string, 632}; 633 634static const struct hwmon_channel_info *const corsairpsu_info[] = { 635 HWMON_CHANNEL_INFO(chip, 636 HWMON_C_REGISTER_TZ), 637 HWMON_CHANNEL_INFO(temp, 638 HWMON_T_INPUT | HWMON_T_LABEL | HWMON_T_CRIT, 639 HWMON_T_INPUT | HWMON_T_LABEL | HWMON_T_CRIT), 640 HWMON_CHANNEL_INFO(fan, 641 HWMON_F_INPUT | HWMON_F_LABEL), 642 HWMON_CHANNEL_INFO(pwm, 643 HWMON_PWM_INPUT | HWMON_PWM_ENABLE), 644 HWMON_CHANNEL_INFO(power, 645 HWMON_P_INPUT | HWMON_P_LABEL, 646 HWMON_P_INPUT | HWMON_P_LABEL, 647 HWMON_P_INPUT | HWMON_P_LABEL, 648 HWMON_P_INPUT | HWMON_P_LABEL), 649 HWMON_CHANNEL_INFO(in, 650 HWMON_I_INPUT | HWMON_I_LABEL, 651 HWMON_I_INPUT | HWMON_I_LABEL | HWMON_I_LCRIT | HWMON_I_CRIT, 652 HWMON_I_INPUT | HWMON_I_LABEL | HWMON_I_LCRIT | HWMON_I_CRIT, 653 HWMON_I_INPUT | HWMON_I_LABEL | HWMON_I_LCRIT | HWMON_I_CRIT), 654 HWMON_CHANNEL_INFO(curr, 655 HWMON_C_INPUT | HWMON_C_LABEL, 656 HWMON_C_INPUT | HWMON_C_LABEL | HWMON_C_CRIT, 657 HWMON_C_INPUT | HWMON_C_LABEL | HWMON_C_CRIT, 658 HWMON_C_INPUT | HWMON_C_LABEL | HWMON_C_CRIT), 659 NULL 660}; 661 662static const struct hwmon_chip_info corsairpsu_chip_info = { 663 .ops = &corsairpsu_hwmon_ops, 664 .info = corsairpsu_info, 665}; 666 667#ifdef CONFIG_DEBUG_FS 668 669static void print_uptime(struct seq_file *seqf, u8 cmd) 670{ 671 struct corsairpsu_data *priv = seqf->private; 672 long val; 673 int ret; 674 675 ret = corsairpsu_get_value(priv, cmd, 0, &val); 676 if (ret < 0) { 677 seq_puts(seqf, "N/A\n"); 678 return; 679 } 680 681 if (val > SECONDS_PER_DAY) { 682 seq_printf(seqf, "%ld day(s), %02ld:%02ld:%02ld\n", val / SECONDS_PER_DAY, 683 val % SECONDS_PER_DAY / SECONDS_PER_HOUR, val % SECONDS_PER_HOUR / 60, 684 val % 60); 685 return; 686 } 687 688 seq_printf(seqf, "%02ld:%02ld:%02ld\n", val % SECONDS_PER_DAY / SECONDS_PER_HOUR, 689 val % SECONDS_PER_HOUR / 60, val % 60); 690} 691 692static int uptime_show(struct seq_file *seqf, void *unused) 693{ 694 print_uptime(seqf, PSU_CMD_UPTIME); 695 696 return 0; 697} 698DEFINE_SHOW_ATTRIBUTE(uptime); 699 700static int uptime_total_show(struct seq_file *seqf, void *unused) 701{ 702 print_uptime(seqf, PSU_CMD_TOTAL_UPTIME); 703 704 return 0; 705} 706DEFINE_SHOW_ATTRIBUTE(uptime_total); 707 708static int vendor_show(struct seq_file *seqf, void *unused) 709{ 710 struct corsairpsu_data *priv = seqf->private; 711 712 seq_printf(seqf, "%s\n", priv->vendor); 713 714 return 0; 715} 716DEFINE_SHOW_ATTRIBUTE(vendor); 717 718static int product_show(struct seq_file *seqf, void *unused) 719{ 720 struct corsairpsu_data *priv = seqf->private; 721 722 seq_printf(seqf, "%s\n", priv->product); 723 724 return 0; 725} 726DEFINE_SHOW_ATTRIBUTE(product); 727 728static int ocpmode_show(struct seq_file *seqf, void *unused) 729{ 730 struct corsairpsu_data *priv = seqf->private; 731 long val; 732 int ret; 733 734 /* 735 * The rail mode is switchable on the fly. The RAW interface can be used for this. But it 736 * will not be included here, because I consider it somewhat dangerous for the health of the 737 * PSU. The returned value can be a bogus one, if the PSU is in the process of switching and 738 * getting of the value itself can also fail during this. Because of this every other value 739 * than OCP_MULTI_RAIL can be considered as "single rail". 740 */ 741 ret = corsairpsu_get_value(priv, PSU_CMD_OCPMODE, 0, &val); 742 if (ret < 0) 743 seq_puts(seqf, "N/A\n"); 744 else 745 seq_printf(seqf, "%s\n", (val == OCP_MULTI_RAIL) ? "multi rail" : "single rail"); 746 747 return 0; 748} 749DEFINE_SHOW_ATTRIBUTE(ocpmode); 750 751static void corsairpsu_debugfs_init(struct corsairpsu_data *priv) 752{ 753 char name[32]; 754 755 scnprintf(name, sizeof(name), "%s-%s", DRIVER_NAME, dev_name(&priv->hdev->dev)); 756 757 priv->debugfs = debugfs_create_dir(name, NULL); 758 debugfs_create_file("uptime", 0444, priv->debugfs, priv, &uptime_fops); 759 debugfs_create_file("uptime_total", 0444, priv->debugfs, priv, &uptime_total_fops); 760 debugfs_create_file("vendor", 0444, priv->debugfs, priv, &vendor_fops); 761 debugfs_create_file("product", 0444, priv->debugfs, priv, &product_fops); 762 debugfs_create_file("ocpmode", 0444, priv->debugfs, priv, &ocpmode_fops); 763} 764 765#else 766 767static void corsairpsu_debugfs_init(struct corsairpsu_data *priv) 768{ 769} 770 771#endif 772 773static int corsairpsu_probe(struct hid_device *hdev, const struct hid_device_id *id) 774{ 775 struct corsairpsu_data *priv; 776 int ret; 777 778 priv = devm_kzalloc(&hdev->dev, sizeof(struct corsairpsu_data), GFP_KERNEL); 779 if (!priv) 780 return -ENOMEM; 781 782 priv->cmd_buffer = devm_kmalloc(&hdev->dev, CMD_BUFFER_SIZE, GFP_KERNEL); 783 if (!priv->cmd_buffer) 784 return -ENOMEM; 785 786 ret = hid_parse(hdev); 787 if (ret) 788 return ret; 789 790 ret = hid_hw_start(hdev, HID_CONNECT_HIDRAW); 791 if (ret) 792 return ret; 793 794 ret = hid_hw_open(hdev); 795 if (ret) 796 goto fail_and_stop; 797 798 priv->hdev = hdev; 799 hid_set_drvdata(hdev, priv); 800 mutex_init(&priv->lock); 801 init_completion(&priv->wait_completion); 802 803 hid_device_io_start(hdev); 804 805 ret = corsairpsu_init(priv); 806 if (ret < 0) { 807 dev_err(&hdev->dev, "unable to initialize device (%d)\n", ret); 808 goto fail_and_stop; 809 } 810 811 ret = corsairpsu_fwinfo(priv); 812 if (ret < 0) { 813 dev_err(&hdev->dev, "unable to query firmware (%d)\n", ret); 814 goto fail_and_stop; 815 } 816 817 corsairpsu_get_criticals(priv); 818 corsairpsu_check_cmd_support(priv); 819 820 priv->hwmon_dev = hwmon_device_register_with_info(&hdev->dev, "corsairpsu", priv, 821 &corsairpsu_chip_info, NULL); 822 823 if (IS_ERR(priv->hwmon_dev)) { 824 ret = PTR_ERR(priv->hwmon_dev); 825 goto fail_and_close; 826 } 827 828 corsairpsu_debugfs_init(priv); 829 830 return 0; 831 832fail_and_close: 833 hid_hw_close(hdev); 834fail_and_stop: 835 hid_hw_stop(hdev); 836 return ret; 837} 838 839static void corsairpsu_remove(struct hid_device *hdev) 840{ 841 struct corsairpsu_data *priv = hid_get_drvdata(hdev); 842 843 debugfs_remove_recursive(priv->debugfs); 844 hwmon_device_unregister(priv->hwmon_dev); 845 hid_hw_close(hdev); 846 hid_hw_stop(hdev); 847} 848 849static int corsairpsu_raw_event(struct hid_device *hdev, struct hid_report *report, u8 *data, 850 int size) 851{ 852 struct corsairpsu_data *priv = hid_get_drvdata(hdev); 853 854 if (completion_done(&priv->wait_completion)) 855 return 0; 856 857 memcpy(priv->cmd_buffer, data, min(CMD_BUFFER_SIZE, size)); 858 complete(&priv->wait_completion); 859 860 return 0; 861} 862 863#ifdef CONFIG_PM 864static int corsairpsu_resume(struct hid_device *hdev) 865{ 866 struct corsairpsu_data *priv = hid_get_drvdata(hdev); 867 868 /* some PSUs turn off the microcontroller during standby, so a reinit is required */ 869 return corsairpsu_init(priv); 870} 871#endif 872 873static const struct hid_device_id corsairpsu_idtable[] = { 874 { HID_USB_DEVICE(0x1b1c, 0x1c03) }, /* Corsair HX550i */ 875 { HID_USB_DEVICE(0x1b1c, 0x1c04) }, /* Corsair HX650i */ 876 { HID_USB_DEVICE(0x1b1c, 0x1c05) }, /* Corsair HX750i */ 877 { HID_USB_DEVICE(0x1b1c, 0x1c06) }, /* Corsair HX850i */ 878 { HID_USB_DEVICE(0x1b1c, 0x1c07) }, /* Corsair HX1000i Series 2022 */ 879 { HID_USB_DEVICE(0x1b1c, 0x1c08) }, /* Corsair HX1200i */ 880 { HID_USB_DEVICE(0x1b1c, 0x1c09) }, /* Corsair RM550i */ 881 { HID_USB_DEVICE(0x1b1c, 0x1c0a) }, /* Corsair RM650i */ 882 { HID_USB_DEVICE(0x1b1c, 0x1c0b) }, /* Corsair RM750i */ 883 { HID_USB_DEVICE(0x1b1c, 0x1c0c) }, /* Corsair RM850i */ 884 { HID_USB_DEVICE(0x1b1c, 0x1c0d) }, /* Corsair RM1000i */ 885 { HID_USB_DEVICE(0x1b1c, 0x1c1e) }, /* Corsair HX1000i Series 2023 */ 886 { HID_USB_DEVICE(0x1b1c, 0x1c1f) }, /* Corsair HX1500i Series 2022 and 2023 */ 887 { }, 888}; 889MODULE_DEVICE_TABLE(hid, corsairpsu_idtable); 890 891static struct hid_driver corsairpsu_driver = { 892 .name = DRIVER_NAME, 893 .id_table = corsairpsu_idtable, 894 .probe = corsairpsu_probe, 895 .remove = corsairpsu_remove, 896 .raw_event = corsairpsu_raw_event, 897#ifdef CONFIG_PM 898 .resume = corsairpsu_resume, 899 .reset_resume = corsairpsu_resume, 900#endif 901}; 902 903static int __init corsair_init(void) 904{ 905 return hid_register_driver(&corsairpsu_driver); 906} 907 908static void __exit corsair_exit(void) 909{ 910 hid_unregister_driver(&corsairpsu_driver); 911} 912 913/* 914 * With module_init() the driver would load before the HID bus when 915 * built-in, so use late_initcall() instead. 916 */ 917late_initcall(corsair_init); 918module_exit(corsair_exit); 919 920MODULE_LICENSE("GPL"); 921MODULE_AUTHOR("Wilken Gottwalt <wilken.gottwalt@posteo.net>"); 922MODULE_DESCRIPTION("Linux driver for Corsair power supplies with HID sensors interface"); 923