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 start 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 * for now that uses non-zero values) 42 * - there are much more commands, especially for configuring the device, but they are not 43 * supported because a wrong command/length can lockup the micro-controller 44 * - the driver supports debugfs for values not fitting into the hwmon class 45 * - not every device class (HXi, RMi or AXi) supports all commands 46 * - it is a pure sensors reading driver (will not support configuring) 47 */ 48 49 #define DRIVER_NAME "corsair-psu" 50 51 #define REPLY_SIZE 16 /* max length of a reply to a single command */ 52 #define CMD_BUFFER_SIZE 64 53 #define CMD_TIMEOUT_MS 250 54 #define SECONDS_PER_HOUR (60 * 60) 55 #define SECONDS_PER_DAY (SECONDS_PER_HOUR * 24) 56 #define RAIL_COUNT 3 /* 3v3 + 5v + 12v */ 57 #define TEMP_COUNT 2 58 59 #define PSU_CMD_SELECT_RAIL 0x00 /* expects length 2 */ 60 #define PSU_CMD_RAIL_VOLTS_HCRIT 0x40 /* the rest of the commands expect length 3 */ 61 #define PSU_CMD_RAIL_VOLTS_LCRIT 0x44 62 #define PSU_CMD_RAIL_AMPS_HCRIT 0x46 63 #define PSU_CMD_TEMP_HCRIT 0x4F 64 #define PSU_CMD_IN_VOLTS 0x88 65 #define PSU_CMD_IN_AMPS 0x89 66 #define PSU_CMD_RAIL_VOLTS 0x8B 67 #define PSU_CMD_RAIL_AMPS 0x8C 68 #define PSU_CMD_TEMP0 0x8D 69 #define PSU_CMD_TEMP1 0x8E 70 #define PSU_CMD_FAN 0x90 71 #define PSU_CMD_RAIL_WATTS 0x96 72 #define PSU_CMD_VEND_STR 0x99 73 #define PSU_CMD_PROD_STR 0x9A 74 #define PSU_CMD_TOTAL_WATTS 0xEE 75 #define PSU_CMD_TOTAL_UPTIME 0xD1 76 #define PSU_CMD_UPTIME 0xD2 77 #define PSU_CMD_INIT 0xFE 78 79 #define L_IN_VOLTS "v_in" 80 #define L_OUT_VOLTS_12V "v_out +12v" 81 #define L_OUT_VOLTS_5V "v_out +5v" 82 #define L_OUT_VOLTS_3_3V "v_out +3.3v" 83 #define L_IN_AMPS "curr in" 84 #define L_AMPS_12V "curr +12v" 85 #define L_AMPS_5V "curr +5v" 86 #define L_AMPS_3_3V "curr +3.3v" 87 #define L_FAN "psu fan" 88 #define L_TEMP0 "vrm temp" 89 #define L_TEMP1 "case temp" 90 #define L_WATTS "power total" 91 #define L_WATTS_12V "power +12v" 92 #define L_WATTS_5V "power +5v" 93 #define L_WATTS_3_3V "power +3.3v" 94 95 static const char *const label_watts[] = { 96 L_WATTS, 97 L_WATTS_12V, 98 L_WATTS_5V, 99 L_WATTS_3_3V 100 }; 101 102 static const char *const label_volts[] = { 103 L_IN_VOLTS, 104 L_OUT_VOLTS_12V, 105 L_OUT_VOLTS_5V, 106 L_OUT_VOLTS_3_3V 107 }; 108 109 static const char *const label_amps[] = { 110 L_IN_AMPS, 111 L_AMPS_12V, 112 L_AMPS_5V, 113 L_AMPS_3_3V 114 }; 115 116 struct corsairpsu_data { 117 struct hid_device *hdev; 118 struct device *hwmon_dev; 119 struct dentry *debugfs; 120 struct completion wait_completion; 121 struct mutex lock; /* for locking access to cmd_buffer */ 122 u8 *cmd_buffer; 123 char vendor[REPLY_SIZE]; 124 char product[REPLY_SIZE]; 125 long temp_crit[TEMP_COUNT]; 126 long in_crit[RAIL_COUNT]; 127 long in_lcrit[RAIL_COUNT]; 128 long curr_crit[RAIL_COUNT]; 129 u8 temp_crit_support; 130 u8 in_crit_support; 131 u8 in_lcrit_support; 132 u8 curr_crit_support; 133 bool in_curr_cmd_support; /* not all commands are supported on every PSU */ 134 }; 135 136 /* some values are SMBus LINEAR11 data which need a conversion */ 137 static int corsairpsu_linear11_to_int(const u16 val, const int scale) 138 { 139 const int exp = ((s16)val) >> 11; 140 const int mant = (((s16)(val & 0x7ff)) << 5) >> 5; 141 const int result = mant * scale; 142 143 return (exp >= 0) ? (result << exp) : (result >> -exp); 144 } 145 146 static int corsairpsu_usb_cmd(struct corsairpsu_data *priv, u8 p0, u8 p1, u8 p2, void *data) 147 { 148 unsigned long time; 149 int ret; 150 151 memset(priv->cmd_buffer, 0, CMD_BUFFER_SIZE); 152 priv->cmd_buffer[0] = p0; 153 priv->cmd_buffer[1] = p1; 154 priv->cmd_buffer[2] = p2; 155 156 reinit_completion(&priv->wait_completion); 157 158 ret = hid_hw_output_report(priv->hdev, priv->cmd_buffer, CMD_BUFFER_SIZE); 159 if (ret < 0) 160 return ret; 161 162 time = wait_for_completion_timeout(&priv->wait_completion, 163 msecs_to_jiffies(CMD_TIMEOUT_MS)); 164 if (!time) 165 return -ETIMEDOUT; 166 167 /* 168 * at the start of the reply is an echo of the send command/length in the same order it 169 * was send, not every command is supported on every device class, if a command is not 170 * supported, the length value in the reply is okay, but the command value is set to 0 171 */ 172 if (p0 != priv->cmd_buffer[0] || p1 != priv->cmd_buffer[1]) 173 return -EOPNOTSUPP; 174 175 if (data) 176 memcpy(data, priv->cmd_buffer + 2, REPLY_SIZE); 177 178 return 0; 179 } 180 181 static int corsairpsu_init(struct corsairpsu_data *priv) 182 { 183 /* 184 * PSU_CMD_INIT uses swapped length/command and expects 2 parameter bytes, this command 185 * actually generates a reply, but we don't need it 186 */ 187 return corsairpsu_usb_cmd(priv, PSU_CMD_INIT, 3, 0, NULL); 188 } 189 190 static int corsairpsu_fwinfo(struct corsairpsu_data *priv) 191 { 192 int ret; 193 194 ret = corsairpsu_usb_cmd(priv, 3, PSU_CMD_VEND_STR, 0, priv->vendor); 195 if (ret < 0) 196 return ret; 197 198 ret = corsairpsu_usb_cmd(priv, 3, PSU_CMD_PROD_STR, 0, priv->product); 199 if (ret < 0) 200 return ret; 201 202 return 0; 203 } 204 205 static int corsairpsu_request(struct corsairpsu_data *priv, u8 cmd, u8 rail, void *data) 206 { 207 int ret; 208 209 mutex_lock(&priv->lock); 210 switch (cmd) { 211 case PSU_CMD_RAIL_VOLTS_HCRIT: 212 case PSU_CMD_RAIL_VOLTS_LCRIT: 213 case PSU_CMD_RAIL_AMPS_HCRIT: 214 case PSU_CMD_RAIL_VOLTS: 215 case PSU_CMD_RAIL_AMPS: 216 case PSU_CMD_RAIL_WATTS: 217 ret = corsairpsu_usb_cmd(priv, 2, PSU_CMD_SELECT_RAIL, rail, NULL); 218 if (ret < 0) 219 goto cmd_fail; 220 break; 221 default: 222 break; 223 } 224 225 ret = corsairpsu_usb_cmd(priv, 3, cmd, 0, data); 226 227 cmd_fail: 228 mutex_unlock(&priv->lock); 229 return ret; 230 } 231 232 static int corsairpsu_get_value(struct corsairpsu_data *priv, u8 cmd, u8 rail, long *val) 233 { 234 u8 data[REPLY_SIZE]; 235 long tmp; 236 int ret; 237 238 ret = corsairpsu_request(priv, cmd, rail, data); 239 if (ret < 0) 240 return ret; 241 242 /* 243 * the biggest value here comes from the uptime command and to exceed MAXINT total uptime 244 * needs to be about 68 years, the rest are u16 values and the biggest value coming out of 245 * the LINEAR11 conversion are the watts values which are about 1200 for the strongest psu 246 * supported (HX1200i) 247 */ 248 tmp = ((long)data[3] << 24) + (data[2] << 16) + (data[1] << 8) + data[0]; 249 switch (cmd) { 250 case PSU_CMD_RAIL_VOLTS_HCRIT: 251 case PSU_CMD_RAIL_VOLTS_LCRIT: 252 case PSU_CMD_RAIL_AMPS_HCRIT: 253 case PSU_CMD_TEMP_HCRIT: 254 case PSU_CMD_IN_VOLTS: 255 case PSU_CMD_IN_AMPS: 256 case PSU_CMD_RAIL_VOLTS: 257 case PSU_CMD_RAIL_AMPS: 258 case PSU_CMD_TEMP0: 259 case PSU_CMD_TEMP1: 260 *val = corsairpsu_linear11_to_int(tmp & 0xFFFF, 1000); 261 break; 262 case PSU_CMD_FAN: 263 *val = corsairpsu_linear11_to_int(tmp & 0xFFFF, 1); 264 break; 265 case PSU_CMD_RAIL_WATTS: 266 case PSU_CMD_TOTAL_WATTS: 267 *val = corsairpsu_linear11_to_int(tmp & 0xFFFF, 1000000); 268 break; 269 case PSU_CMD_TOTAL_UPTIME: 270 case PSU_CMD_UPTIME: 271 *val = tmp; 272 break; 273 default: 274 ret = -EOPNOTSUPP; 275 break; 276 } 277 278 return ret; 279 } 280 281 static void corsairpsu_get_criticals(struct corsairpsu_data *priv) 282 { 283 long tmp; 284 int rail; 285 286 for (rail = 0; rail < TEMP_COUNT; ++rail) { 287 if (!corsairpsu_get_value(priv, PSU_CMD_TEMP_HCRIT, rail, &tmp)) { 288 priv->temp_crit_support |= BIT(rail); 289 priv->temp_crit[rail] = tmp; 290 } 291 } 292 293 for (rail = 0; rail < RAIL_COUNT; ++rail) { 294 if (!corsairpsu_get_value(priv, PSU_CMD_RAIL_VOLTS_HCRIT, rail, &tmp)) { 295 priv->in_crit_support |= BIT(rail); 296 priv->in_crit[rail] = tmp; 297 } 298 299 if (!corsairpsu_get_value(priv, PSU_CMD_RAIL_VOLTS_LCRIT, rail, &tmp)) { 300 priv->in_lcrit_support |= BIT(rail); 301 priv->in_lcrit[rail] = tmp; 302 } 303 304 if (!corsairpsu_get_value(priv, PSU_CMD_RAIL_AMPS_HCRIT, rail, &tmp)) { 305 priv->curr_crit_support |= BIT(rail); 306 priv->curr_crit[rail] = tmp; 307 } 308 } 309 } 310 311 static void corsairpsu_check_cmd_support(struct corsairpsu_data *priv) 312 { 313 long tmp; 314 315 priv->in_curr_cmd_support = !corsairpsu_get_value(priv, PSU_CMD_IN_AMPS, 0, &tmp); 316 } 317 318 static umode_t corsairpsu_hwmon_temp_is_visible(const struct corsairpsu_data *priv, u32 attr, 319 int channel) 320 { 321 umode_t res = 0444; 322 323 switch (attr) { 324 case hwmon_temp_input: 325 case hwmon_temp_label: 326 case hwmon_temp_crit: 327 if (channel > 0 && !(priv->temp_crit_support & BIT(channel - 1))) 328 res = 0; 329 break; 330 default: 331 break; 332 } 333 334 return res; 335 } 336 337 static umode_t corsairpsu_hwmon_fan_is_visible(const struct corsairpsu_data *priv, u32 attr, 338 int channel) 339 { 340 switch (attr) { 341 case hwmon_fan_input: 342 case hwmon_fan_label: 343 return 0444; 344 default: 345 return 0; 346 } 347 } 348 349 static umode_t corsairpsu_hwmon_power_is_visible(const struct corsairpsu_data *priv, u32 attr, 350 int channel) 351 { 352 switch (attr) { 353 case hwmon_power_input: 354 case hwmon_power_label: 355 return 0444; 356 default: 357 return 0; 358 } 359 } 360 361 static umode_t corsairpsu_hwmon_in_is_visible(const struct corsairpsu_data *priv, u32 attr, 362 int channel) 363 { 364 umode_t res = 0444; 365 366 switch (attr) { 367 case hwmon_in_input: 368 case hwmon_in_label: 369 case hwmon_in_crit: 370 if (channel > 0 && !(priv->in_crit_support & BIT(channel - 1))) 371 res = 0; 372 break; 373 case hwmon_in_lcrit: 374 if (channel > 0 && !(priv->in_lcrit_support & BIT(channel - 1))) 375 res = 0; 376 break; 377 default: 378 break; 379 } 380 381 return res; 382 } 383 384 static umode_t corsairpsu_hwmon_curr_is_visible(const struct corsairpsu_data *priv, u32 attr, 385 int channel) 386 { 387 umode_t res = 0444; 388 389 switch (attr) { 390 case hwmon_curr_input: 391 if (channel == 0 && !priv->in_curr_cmd_support) 392 res = 0; 393 break; 394 case hwmon_curr_label: 395 case hwmon_curr_crit: 396 if (channel > 0 && !(priv->curr_crit_support & BIT(channel - 1))) 397 res = 0; 398 break; 399 default: 400 break; 401 } 402 403 return res; 404 } 405 406 static umode_t corsairpsu_hwmon_ops_is_visible(const void *data, enum hwmon_sensor_types type, 407 u32 attr, int channel) 408 { 409 const struct corsairpsu_data *priv = data; 410 411 switch (type) { 412 case hwmon_temp: 413 return corsairpsu_hwmon_temp_is_visible(priv, attr, channel); 414 case hwmon_fan: 415 return corsairpsu_hwmon_fan_is_visible(priv, attr, channel); 416 case hwmon_power: 417 return corsairpsu_hwmon_power_is_visible(priv, attr, channel); 418 case hwmon_in: 419 return corsairpsu_hwmon_in_is_visible(priv, attr, channel); 420 case hwmon_curr: 421 return corsairpsu_hwmon_curr_is_visible(priv, attr, channel); 422 default: 423 return 0; 424 } 425 } 426 427 static int corsairpsu_hwmon_temp_read(struct corsairpsu_data *priv, u32 attr, int channel, 428 long *val) 429 { 430 int err = -EOPNOTSUPP; 431 432 switch (attr) { 433 case hwmon_temp_input: 434 return corsairpsu_get_value(priv, channel ? PSU_CMD_TEMP1 : PSU_CMD_TEMP0, 435 channel, val); 436 case hwmon_temp_crit: 437 *val = priv->temp_crit[channel]; 438 err = 0; 439 break; 440 default: 441 break; 442 } 443 444 return err; 445 } 446 447 static int corsairpsu_hwmon_power_read(struct corsairpsu_data *priv, u32 attr, int channel, 448 long *val) 449 { 450 if (attr == hwmon_power_input) { 451 switch (channel) { 452 case 0: 453 return corsairpsu_get_value(priv, PSU_CMD_TOTAL_WATTS, 0, val); 454 case 1 ... 3: 455 return corsairpsu_get_value(priv, PSU_CMD_RAIL_WATTS, channel - 1, val); 456 default: 457 break; 458 } 459 } 460 461 return -EOPNOTSUPP; 462 } 463 464 static int corsairpsu_hwmon_in_read(struct corsairpsu_data *priv, u32 attr, int channel, long *val) 465 { 466 int err = -EOPNOTSUPP; 467 468 switch (attr) { 469 case hwmon_in_input: 470 switch (channel) { 471 case 0: 472 return corsairpsu_get_value(priv, PSU_CMD_IN_VOLTS, 0, val); 473 case 1 ... 3: 474 return corsairpsu_get_value(priv, PSU_CMD_RAIL_VOLTS, channel - 1, val); 475 default: 476 break; 477 } 478 break; 479 case hwmon_in_crit: 480 *val = priv->in_crit[channel - 1]; 481 err = 0; 482 break; 483 case hwmon_in_lcrit: 484 *val = priv->in_lcrit[channel - 1]; 485 err = 0; 486 break; 487 } 488 489 return err; 490 } 491 492 static int corsairpsu_hwmon_curr_read(struct corsairpsu_data *priv, u32 attr, int channel, 493 long *val) 494 { 495 int err = -EOPNOTSUPP; 496 497 switch (attr) { 498 case hwmon_curr_input: 499 switch (channel) { 500 case 0: 501 return corsairpsu_get_value(priv, PSU_CMD_IN_AMPS, 0, val); 502 case 1 ... 3: 503 return corsairpsu_get_value(priv, PSU_CMD_RAIL_AMPS, channel - 1, val); 504 default: 505 break; 506 } 507 break; 508 case hwmon_curr_crit: 509 *val = priv->curr_crit[channel - 1]; 510 err = 0; 511 break; 512 default: 513 break; 514 } 515 516 return err; 517 } 518 519 static int corsairpsu_hwmon_ops_read(struct device *dev, enum hwmon_sensor_types type, u32 attr, 520 int channel, long *val) 521 { 522 struct corsairpsu_data *priv = dev_get_drvdata(dev); 523 524 switch (type) { 525 case hwmon_temp: 526 return corsairpsu_hwmon_temp_read(priv, attr, channel, val); 527 case hwmon_fan: 528 if (attr == hwmon_fan_input) 529 return corsairpsu_get_value(priv, PSU_CMD_FAN, 0, val); 530 return -EOPNOTSUPP; 531 case hwmon_power: 532 return corsairpsu_hwmon_power_read(priv, attr, channel, val); 533 case hwmon_in: 534 return corsairpsu_hwmon_in_read(priv, attr, channel, val); 535 case hwmon_curr: 536 return corsairpsu_hwmon_curr_read(priv, attr, channel, val); 537 default: 538 return -EOPNOTSUPP; 539 } 540 } 541 542 static int corsairpsu_hwmon_ops_read_string(struct device *dev, enum hwmon_sensor_types type, 543 u32 attr, int channel, const char **str) 544 { 545 if (type == hwmon_temp && attr == hwmon_temp_label) { 546 *str = channel ? L_TEMP1 : L_TEMP0; 547 return 0; 548 } else if (type == hwmon_fan && attr == hwmon_fan_label) { 549 *str = L_FAN; 550 return 0; 551 } else if (type == hwmon_power && attr == hwmon_power_label && channel < 4) { 552 *str = label_watts[channel]; 553 return 0; 554 } else if (type == hwmon_in && attr == hwmon_in_label && channel < 4) { 555 *str = label_volts[channel]; 556 return 0; 557 } else if (type == hwmon_curr && attr == hwmon_curr_label && channel < 4) { 558 *str = label_amps[channel]; 559 return 0; 560 } 561 562 return -EOPNOTSUPP; 563 } 564 565 static const struct hwmon_ops corsairpsu_hwmon_ops = { 566 .is_visible = corsairpsu_hwmon_ops_is_visible, 567 .read = corsairpsu_hwmon_ops_read, 568 .read_string = corsairpsu_hwmon_ops_read_string, 569 }; 570 571 static const struct hwmon_channel_info *corsairpsu_info[] = { 572 HWMON_CHANNEL_INFO(chip, 573 HWMON_C_REGISTER_TZ), 574 HWMON_CHANNEL_INFO(temp, 575 HWMON_T_INPUT | HWMON_T_LABEL | HWMON_T_CRIT, 576 HWMON_T_INPUT | HWMON_T_LABEL | HWMON_T_CRIT), 577 HWMON_CHANNEL_INFO(fan, 578 HWMON_F_INPUT | HWMON_F_LABEL), 579 HWMON_CHANNEL_INFO(power, 580 HWMON_P_INPUT | HWMON_P_LABEL, 581 HWMON_P_INPUT | HWMON_P_LABEL, 582 HWMON_P_INPUT | HWMON_P_LABEL, 583 HWMON_P_INPUT | HWMON_P_LABEL), 584 HWMON_CHANNEL_INFO(in, 585 HWMON_I_INPUT | HWMON_I_LABEL, 586 HWMON_I_INPUT | HWMON_I_LABEL | HWMON_I_LCRIT | HWMON_I_CRIT, 587 HWMON_I_INPUT | HWMON_I_LABEL | HWMON_I_LCRIT | HWMON_I_CRIT, 588 HWMON_I_INPUT | HWMON_I_LABEL | HWMON_I_LCRIT | HWMON_I_CRIT), 589 HWMON_CHANNEL_INFO(curr, 590 HWMON_C_INPUT | HWMON_C_LABEL, 591 HWMON_C_INPUT | HWMON_C_LABEL | HWMON_C_CRIT, 592 HWMON_C_INPUT | HWMON_C_LABEL | HWMON_C_CRIT, 593 HWMON_C_INPUT | HWMON_C_LABEL | HWMON_C_CRIT), 594 NULL 595 }; 596 597 static const struct hwmon_chip_info corsairpsu_chip_info = { 598 .ops = &corsairpsu_hwmon_ops, 599 .info = corsairpsu_info, 600 }; 601 602 #ifdef CONFIG_DEBUG_FS 603 604 static void print_uptime(struct seq_file *seqf, u8 cmd) 605 { 606 struct corsairpsu_data *priv = seqf->private; 607 long val; 608 int ret; 609 610 ret = corsairpsu_get_value(priv, cmd, 0, &val); 611 if (ret < 0) { 612 seq_puts(seqf, "N/A\n"); 613 return; 614 } 615 616 if (val > SECONDS_PER_DAY) { 617 seq_printf(seqf, "%ld day(s), %02ld:%02ld:%02ld\n", val / SECONDS_PER_DAY, 618 val % SECONDS_PER_DAY / SECONDS_PER_HOUR, val % SECONDS_PER_HOUR / 60, 619 val % 60); 620 return; 621 } 622 623 seq_printf(seqf, "%02ld:%02ld:%02ld\n", val % SECONDS_PER_DAY / SECONDS_PER_HOUR, 624 val % SECONDS_PER_HOUR / 60, val % 60); 625 } 626 627 static int uptime_show(struct seq_file *seqf, void *unused) 628 { 629 print_uptime(seqf, PSU_CMD_UPTIME); 630 631 return 0; 632 } 633 DEFINE_SHOW_ATTRIBUTE(uptime); 634 635 static int uptime_total_show(struct seq_file *seqf, void *unused) 636 { 637 print_uptime(seqf, PSU_CMD_TOTAL_UPTIME); 638 639 return 0; 640 } 641 DEFINE_SHOW_ATTRIBUTE(uptime_total); 642 643 static int vendor_show(struct seq_file *seqf, void *unused) 644 { 645 struct corsairpsu_data *priv = seqf->private; 646 647 seq_printf(seqf, "%s\n", priv->vendor); 648 649 return 0; 650 } 651 DEFINE_SHOW_ATTRIBUTE(vendor); 652 653 static int product_show(struct seq_file *seqf, void *unused) 654 { 655 struct corsairpsu_data *priv = seqf->private; 656 657 seq_printf(seqf, "%s\n", priv->product); 658 659 return 0; 660 } 661 DEFINE_SHOW_ATTRIBUTE(product); 662 663 static void corsairpsu_debugfs_init(struct corsairpsu_data *priv) 664 { 665 char name[32]; 666 667 scnprintf(name, sizeof(name), "%s-%s", DRIVER_NAME, dev_name(&priv->hdev->dev)); 668 669 priv->debugfs = debugfs_create_dir(name, NULL); 670 debugfs_create_file("uptime", 0444, priv->debugfs, priv, &uptime_fops); 671 debugfs_create_file("uptime_total", 0444, priv->debugfs, priv, &uptime_total_fops); 672 debugfs_create_file("vendor", 0444, priv->debugfs, priv, &vendor_fops); 673 debugfs_create_file("product", 0444, priv->debugfs, priv, &product_fops); 674 } 675 676 #else 677 678 static void corsairpsu_debugfs_init(struct corsairpsu_data *priv) 679 { 680 } 681 682 #endif 683 684 static int corsairpsu_probe(struct hid_device *hdev, const struct hid_device_id *id) 685 { 686 struct corsairpsu_data *priv; 687 int ret; 688 689 priv = devm_kzalloc(&hdev->dev, sizeof(struct corsairpsu_data), GFP_KERNEL); 690 if (!priv) 691 return -ENOMEM; 692 693 priv->cmd_buffer = devm_kmalloc(&hdev->dev, CMD_BUFFER_SIZE, GFP_KERNEL); 694 if (!priv->cmd_buffer) 695 return -ENOMEM; 696 697 ret = hid_parse(hdev); 698 if (ret) 699 return ret; 700 701 ret = hid_hw_start(hdev, HID_CONNECT_HIDRAW); 702 if (ret) 703 return ret; 704 705 ret = hid_hw_open(hdev); 706 if (ret) 707 goto fail_and_stop; 708 709 priv->hdev = hdev; 710 hid_set_drvdata(hdev, priv); 711 mutex_init(&priv->lock); 712 init_completion(&priv->wait_completion); 713 714 hid_device_io_start(hdev); 715 716 ret = corsairpsu_init(priv); 717 if (ret < 0) { 718 dev_err(&hdev->dev, "unable to initialize device (%d)\n", ret); 719 goto fail_and_stop; 720 } 721 722 ret = corsairpsu_fwinfo(priv); 723 if (ret < 0) { 724 dev_err(&hdev->dev, "unable to query firmware (%d)\n", ret); 725 goto fail_and_stop; 726 } 727 728 corsairpsu_get_criticals(priv); 729 corsairpsu_check_cmd_support(priv); 730 731 priv->hwmon_dev = hwmon_device_register_with_info(&hdev->dev, "corsairpsu", priv, 732 &corsairpsu_chip_info, NULL); 733 734 if (IS_ERR(priv->hwmon_dev)) { 735 ret = PTR_ERR(priv->hwmon_dev); 736 goto fail_and_close; 737 } 738 739 corsairpsu_debugfs_init(priv); 740 741 return 0; 742 743 fail_and_close: 744 hid_hw_close(hdev); 745 fail_and_stop: 746 hid_hw_stop(hdev); 747 return ret; 748 } 749 750 static void corsairpsu_remove(struct hid_device *hdev) 751 { 752 struct corsairpsu_data *priv = hid_get_drvdata(hdev); 753 754 debugfs_remove_recursive(priv->debugfs); 755 hwmon_device_unregister(priv->hwmon_dev); 756 hid_hw_close(hdev); 757 hid_hw_stop(hdev); 758 } 759 760 static int corsairpsu_raw_event(struct hid_device *hdev, struct hid_report *report, u8 *data, 761 int size) 762 { 763 struct corsairpsu_data *priv = hid_get_drvdata(hdev); 764 765 if (completion_done(&priv->wait_completion)) 766 return 0; 767 768 memcpy(priv->cmd_buffer, data, min(CMD_BUFFER_SIZE, size)); 769 complete(&priv->wait_completion); 770 771 return 0; 772 } 773 774 #ifdef CONFIG_PM 775 static int corsairpsu_resume(struct hid_device *hdev) 776 { 777 struct corsairpsu_data *priv = hid_get_drvdata(hdev); 778 779 /* some PSUs turn off the microcontroller during standby, so a reinit is required */ 780 return corsairpsu_init(priv); 781 } 782 #endif 783 784 static const struct hid_device_id corsairpsu_idtable[] = { 785 { HID_USB_DEVICE(0x1b1c, 0x1c03) }, /* Corsair HX550i */ 786 { HID_USB_DEVICE(0x1b1c, 0x1c04) }, /* Corsair HX650i */ 787 { HID_USB_DEVICE(0x1b1c, 0x1c05) }, /* Corsair HX750i */ 788 { HID_USB_DEVICE(0x1b1c, 0x1c06) }, /* Corsair HX850i */ 789 { HID_USB_DEVICE(0x1b1c, 0x1c07) }, /* Corsair HX1000i */ 790 { HID_USB_DEVICE(0x1b1c, 0x1c08) }, /* Corsair HX1200i */ 791 { HID_USB_DEVICE(0x1b1c, 0x1c09) }, /* Corsair RM550i */ 792 { HID_USB_DEVICE(0x1b1c, 0x1c0a) }, /* Corsair RM650i */ 793 { HID_USB_DEVICE(0x1b1c, 0x1c0b) }, /* Corsair RM750i */ 794 { HID_USB_DEVICE(0x1b1c, 0x1c0c) }, /* Corsair RM850i */ 795 { HID_USB_DEVICE(0x1b1c, 0x1c0d) }, /* Corsair RM1000i */ 796 { }, 797 }; 798 MODULE_DEVICE_TABLE(hid, corsairpsu_idtable); 799 800 static struct hid_driver corsairpsu_driver = { 801 .name = DRIVER_NAME, 802 .id_table = corsairpsu_idtable, 803 .probe = corsairpsu_probe, 804 .remove = corsairpsu_remove, 805 .raw_event = corsairpsu_raw_event, 806 #ifdef CONFIG_PM 807 .resume = corsairpsu_resume, 808 .reset_resume = corsairpsu_resume, 809 #endif 810 }; 811 module_hid_driver(corsairpsu_driver); 812 813 MODULE_LICENSE("GPL"); 814 MODULE_AUTHOR("Wilken Gottwalt <wilken.gottwalt@posteo.net>"); 815 MODULE_DESCRIPTION("Linux driver for Corsair power supplies with HID sensors interface"); 816