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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 | // SPDX-License-Identifier: GPL-2.0-only /*************************************************************************** * Copyright (C) 2010-2012 by Bruno Prémont <bonbons@linux-vserver.org> * * * * Based on Logitech G13 driver (v0.4) * * Copyright (C) 2009 by Rick L. Vinyard, Jr. <rvinyard@cs.nmsu.edu> * * * ***************************************************************************/ #include <linux/hid.h> #include <linux/hid-debug.h> #include <linux/fb.h> #include <linux/seq_file.h> #include <linux/debugfs.h> #include <linux/module.h> #include <linux/uaccess.h> #include "hid-picolcd.h" static int picolcd_debug_reset_show(struct seq_file *f, void *p) { if (picolcd_fbinfo((struct picolcd_data *)f->private)) seq_printf(f, "all fb\n"); else seq_printf(f, "all\n"); return 0; } static int picolcd_debug_reset_open(struct inode *inode, struct file *f) { return single_open(f, picolcd_debug_reset_show, inode->i_private); } static ssize_t picolcd_debug_reset_write(struct file *f, const char __user *user_buf, size_t count, loff_t *ppos) { struct picolcd_data *data = ((struct seq_file *)f->private_data)->private; char buf[32]; size_t cnt = min(count, sizeof(buf)-1); if (copy_from_user(buf, user_buf, cnt)) return -EFAULT; while (cnt > 0 && (buf[cnt-1] == ' ' || buf[cnt-1] == '\n')) cnt--; buf[cnt] = '\0'; if (strcmp(buf, "all") == 0) { picolcd_reset(data->hdev); picolcd_fb_reset(data, 1); } else if (strcmp(buf, "fb") == 0) { picolcd_fb_reset(data, 1); } else { return -EINVAL; } return count; } static const struct file_operations picolcd_debug_reset_fops = { .owner = THIS_MODULE, .open = picolcd_debug_reset_open, .read = seq_read, .llseek = seq_lseek, .write = picolcd_debug_reset_write, .release = single_release, }; /* * The "eeprom" file */ static ssize_t picolcd_debug_eeprom_read(struct file *f, char __user *u, size_t s, loff_t *off) { struct picolcd_data *data = f->private_data; struct picolcd_pending *resp; u8 raw_data[3]; ssize_t ret = -EIO; if (s == 0) return -EINVAL; if (*off > 0x0ff) return 0; /* prepare buffer with info about what we want to read (addr & len) */ raw_data[0] = *off & 0xff; raw_data[1] = (*off >> 8) & 0xff; raw_data[2] = s < 20 ? s : 20; if (*off + raw_data[2] > 0xff) raw_data[2] = 0x100 - *off; resp = picolcd_send_and_wait(data->hdev, REPORT_EE_READ, raw_data, sizeof(raw_data)); if (!resp) return -EIO; if (resp->in_report && resp->in_report->id == REPORT_EE_DATA) { /* successful read :) */ ret = resp->raw_data[2]; if (ret > s) ret = s; if (copy_to_user(u, resp->raw_data+3, ret)) ret = -EFAULT; else *off += ret; } /* anything else is some kind of IO error */ kfree(resp); return ret; } static ssize_t picolcd_debug_eeprom_write(struct file *f, const char __user *u, size_t s, loff_t *off) { struct picolcd_data *data = f->private_data; struct picolcd_pending *resp; ssize_t ret = -EIO; u8 raw_data[23]; if (s == 0) return -EINVAL; if (*off > 0x0ff) return -ENOSPC; memset(raw_data, 0, sizeof(raw_data)); raw_data[0] = *off & 0xff; raw_data[1] = (*off >> 8) & 0xff; raw_data[2] = min_t(size_t, 20, s); if (*off + raw_data[2] > 0xff) raw_data[2] = 0x100 - *off; if (copy_from_user(raw_data+3, u, min((u8)20, raw_data[2]))) return -EFAULT; resp = picolcd_send_and_wait(data->hdev, REPORT_EE_WRITE, raw_data, sizeof(raw_data)); if (!resp) return -EIO; if (resp->in_report && resp->in_report->id == REPORT_EE_DATA) { /* check if written data matches */ if (memcmp(raw_data, resp->raw_data, 3+raw_data[2]) == 0) { *off += raw_data[2]; ret = raw_data[2]; } } kfree(resp); return ret; } /* * Notes: * - read/write happens in chunks of at most 20 bytes, it's up to userspace * to loop in order to get more data. * - on write errors on otherwise correct write request the bytes * that should have been written are in undefined state. */ static const struct file_operations picolcd_debug_eeprom_fops = { .owner = THIS_MODULE, .open = simple_open, .read = picolcd_debug_eeprom_read, .write = picolcd_debug_eeprom_write, .llseek = generic_file_llseek, }; /* * The "flash" file */ /* record a flash address to buf (bounds check to be done by caller) */ static int _picolcd_flash_setaddr(struct picolcd_data *data, u8 *buf, long off) { buf[0] = off & 0xff; buf[1] = (off >> 8) & 0xff; if (data->addr_sz == 3) buf[2] = (off >> 16) & 0xff; return data->addr_sz == 2 ? 2 : 3; } /* read a given size of data (bounds check to be done by caller) */ static ssize_t _picolcd_flash_read(struct picolcd_data *data, int report_id, char __user *u, size_t s, loff_t *off) { struct picolcd_pending *resp; u8 raw_data[4]; ssize_t ret = 0; int len_off, err = -EIO; while (s > 0) { err = -EIO; len_off = _picolcd_flash_setaddr(data, raw_data, *off); raw_data[len_off] = s > 32 ? 32 : s; resp = picolcd_send_and_wait(data->hdev, report_id, raw_data, len_off+1); if (!resp || !resp->in_report) goto skip; if (resp->in_report->id == REPORT_MEMORY || resp->in_report->id == REPORT_BL_READ_MEMORY) { if (memcmp(raw_data, resp->raw_data, len_off+1) != 0) goto skip; if (copy_to_user(u+ret, resp->raw_data+len_off+1, raw_data[len_off])) { err = -EFAULT; goto skip; } *off += raw_data[len_off]; s -= raw_data[len_off]; ret += raw_data[len_off]; err = 0; } skip: kfree(resp); if (err) return ret > 0 ? ret : err; } return ret; } static ssize_t picolcd_debug_flash_read(struct file *f, char __user *u, size_t s, loff_t *off) { struct picolcd_data *data = f->private_data; if (s == 0) return -EINVAL; if (*off > 0x05fff) return 0; if (*off + s > 0x05fff) s = 0x06000 - *off; if (data->status & PICOLCD_BOOTLOADER) return _picolcd_flash_read(data, REPORT_BL_READ_MEMORY, u, s, off); else return _picolcd_flash_read(data, REPORT_READ_MEMORY, u, s, off); } /* erase block aligned to 64bytes boundary */ static ssize_t _picolcd_flash_erase64(struct picolcd_data *data, int report_id, loff_t *off) { struct picolcd_pending *resp; u8 raw_data[3]; int len_off; ssize_t ret = -EIO; if (*off & 0x3f) return -EINVAL; len_off = _picolcd_flash_setaddr(data, raw_data, *off); resp = picolcd_send_and_wait(data->hdev, report_id, raw_data, len_off); if (!resp || !resp->in_report) goto skip; if (resp->in_report->id == REPORT_MEMORY || resp->in_report->id == REPORT_BL_ERASE_MEMORY) { if (memcmp(raw_data, resp->raw_data, len_off) != 0) goto skip; ret = 0; } skip: kfree(resp); return ret; } /* write a given size of data (bounds check to be done by caller) */ static ssize_t _picolcd_flash_write(struct picolcd_data *data, int report_id, const char __user *u, size_t s, loff_t *off) { struct picolcd_pending *resp; u8 raw_data[36]; ssize_t ret = 0; int len_off, err = -EIO; while (s > 0) { err = -EIO; len_off = _picolcd_flash_setaddr(data, raw_data, *off); raw_data[len_off] = s > 32 ? 32 : s; if (copy_from_user(raw_data+len_off+1, u, raw_data[len_off])) { err = -EFAULT; break; } resp = picolcd_send_and_wait(data->hdev, report_id, raw_data, len_off+1+raw_data[len_off]); if (!resp || !resp->in_report) goto skip; if (resp->in_report->id == REPORT_MEMORY || resp->in_report->id == REPORT_BL_WRITE_MEMORY) { if (memcmp(raw_data, resp->raw_data, len_off+1+raw_data[len_off]) != 0) goto skip; *off += raw_data[len_off]; s -= raw_data[len_off]; ret += raw_data[len_off]; err = 0; } skip: kfree(resp); if (err) break; } return ret > 0 ? ret : err; } static ssize_t picolcd_debug_flash_write(struct file *f, const char __user *u, size_t s, loff_t *off) { struct picolcd_data *data = f->private_data; ssize_t err, ret = 0; int report_erase, report_write; if (s == 0) return -EINVAL; if (*off > 0x5fff) return -ENOSPC; if (s & 0x3f) return -EINVAL; if (*off & 0x3f) return -EINVAL; if (data->status & PICOLCD_BOOTLOADER) { report_erase = REPORT_BL_ERASE_MEMORY; report_write = REPORT_BL_WRITE_MEMORY; } else { report_erase = REPORT_ERASE_MEMORY; report_write = REPORT_WRITE_MEMORY; } mutex_lock(&data->mutex_flash); while (s > 0) { err = _picolcd_flash_erase64(data, report_erase, off); if (err) break; err = _picolcd_flash_write(data, report_write, u, 64, off); if (err < 0) break; ret += err; *off += err; s -= err; if (err != 64) break; } mutex_unlock(&data->mutex_flash); return ret > 0 ? ret : err; } /* * Notes: * - concurrent writing is prevented by mutex and all writes must be * n*64 bytes and 64-byte aligned, each write being preceded by an * ERASE which erases a 64byte block. * If less than requested was written or an error is returned for an * otherwise correct write request the next 64-byte block which should * have been written is in undefined state (mostly: original, erased, * (half-)written with write error) * - reading can happen without special restriction */ static const struct file_operations picolcd_debug_flash_fops = { .owner = THIS_MODULE, .open = simple_open, .read = picolcd_debug_flash_read, .write = picolcd_debug_flash_write, .llseek = generic_file_llseek, }; /* * Helper code for HID report level dumping/debugging */ static const char * const error_codes[] = { "success", "parameter missing", "data_missing", "block readonly", "block not erasable", "block too big", "section overflow", "invalid command length", "invalid data length", }; static void dump_buff_as_hex(char *dst, size_t dst_sz, const u8 *data, const size_t data_len) { int i, j; for (i = j = 0; i < data_len && j + 4 < dst_sz; i++) { dst[j++] = hex_asc[(data[i] >> 4) & 0x0f]; dst[j++] = hex_asc[data[i] & 0x0f]; dst[j++] = ' '; } dst[j] = '\0'; if (j > 0) dst[j-1] = '\n'; if (i < data_len && j > 2) dst[j-2] = dst[j-3] = '.'; } void picolcd_debug_out_report(struct picolcd_data *data, struct hid_device *hdev, struct hid_report *report) { u8 *raw_data; int raw_size = (report->size >> 3) + 1; char *buff; #define BUFF_SZ 256 /* Avoid unnecessary overhead if debugfs is disabled */ if (list_empty(&hdev->debug_list)) return; buff = kmalloc(BUFF_SZ, GFP_ATOMIC); if (!buff) return; raw_data = hid_alloc_report_buf(report, GFP_ATOMIC); if (!raw_data) { kfree(buff); return; } snprintf(buff, BUFF_SZ, "\nout report %d (size %d) = ", report->id, raw_size); hid_debug_event(hdev, buff); raw_data[0] = report->id; hid_output_report(report, raw_data); dump_buff_as_hex(buff, BUFF_SZ, raw_data, raw_size); hid_debug_event(hdev, buff); switch (report->id) { case REPORT_LED_STATE: /* 1 data byte with GPO state */ snprintf(buff, BUFF_SZ, "out report %s (%d, size=%d)\n", "REPORT_LED_STATE", report->id, raw_size-1); hid_debug_event(hdev, buff); snprintf(buff, BUFF_SZ, "\tGPO state: 0x%02x\n", raw_data[1]); hid_debug_event(hdev, buff); break; case REPORT_BRIGHTNESS: /* 1 data byte with brightness */ snprintf(buff, BUFF_SZ, "out report %s (%d, size=%d)\n", "REPORT_BRIGHTNESS", report->id, raw_size-1); hid_debug_event(hdev, buff); snprintf(buff, BUFF_SZ, "\tBrightness: 0x%02x\n", raw_data[1]); hid_debug_event(hdev, buff); break; case REPORT_CONTRAST: /* 1 data byte with contrast */ snprintf(buff, BUFF_SZ, "out report %s (%d, size=%d)\n", "REPORT_CONTRAST", report->id, raw_size-1); hid_debug_event(hdev, buff); snprintf(buff, BUFF_SZ, "\tContrast: 0x%02x\n", raw_data[1]); hid_debug_event(hdev, buff); break; case REPORT_RESET: /* 2 data bytes with reset duration in ms */ snprintf(buff, BUFF_SZ, "out report %s (%d, size=%d)\n", "REPORT_RESET", report->id, raw_size-1); hid_debug_event(hdev, buff); snprintf(buff, BUFF_SZ, "\tDuration: 0x%02x%02x (%dms)\n", raw_data[2], raw_data[1], raw_data[2] << 8 | raw_data[1]); hid_debug_event(hdev, buff); break; case REPORT_LCD_CMD: /* 63 data bytes with LCD commands */ snprintf(buff, BUFF_SZ, "out report %s (%d, size=%d)\n", "REPORT_LCD_CMD", report->id, raw_size-1); hid_debug_event(hdev, buff); /* TODO: format decoding */ break; case REPORT_LCD_DATA: /* 63 data bytes with LCD data */ snprintf(buff, BUFF_SZ, "out report %s (%d, size=%d)\n", "REPORT_LCD_CMD", report->id, raw_size-1); /* TODO: format decoding */ hid_debug_event(hdev, buff); break; case REPORT_LCD_CMD_DATA: /* 63 data bytes with LCD commands and data */ snprintf(buff, BUFF_SZ, "out report %s (%d, size=%d)\n", "REPORT_LCD_CMD", report->id, raw_size-1); /* TODO: format decoding */ hid_debug_event(hdev, buff); break; case REPORT_EE_READ: /* 3 data bytes with read area description */ snprintf(buff, BUFF_SZ, "out report %s (%d, size=%d)\n", "REPORT_EE_READ", report->id, raw_size-1); hid_debug_event(hdev, buff); snprintf(buff, BUFF_SZ, "\tData address: 0x%02x%02x\n", raw_data[2], raw_data[1]); hid_debug_event(hdev, buff); snprintf(buff, BUFF_SZ, "\tData length: %d\n", raw_data[3]); hid_debug_event(hdev, buff); break; case REPORT_EE_WRITE: /* 3+1..20 data bytes with write area description */ snprintf(buff, BUFF_SZ, "out report %s (%d, size=%d)\n", "REPORT_EE_WRITE", report->id, raw_size-1); hid_debug_event(hdev, buff); snprintf(buff, BUFF_SZ, "\tData address: 0x%02x%02x\n", raw_data[2], raw_data[1]); hid_debug_event(hdev, buff); snprintf(buff, BUFF_SZ, "\tData length: %d\n", raw_data[3]); hid_debug_event(hdev, buff); if (raw_data[3] == 0) { snprintf(buff, BUFF_SZ, "\tNo data\n"); } else if (raw_data[3] + 4 <= raw_size) { snprintf(buff, BUFF_SZ, "\tData: "); hid_debug_event(hdev, buff); dump_buff_as_hex(buff, BUFF_SZ, raw_data+4, raw_data[3]); } else { snprintf(buff, BUFF_SZ, "\tData overflowed\n"); } hid_debug_event(hdev, buff); break; case REPORT_ERASE_MEMORY: case REPORT_BL_ERASE_MEMORY: /* 3 data bytes with pointer inside erase block */ snprintf(buff, BUFF_SZ, "out report %s (%d, size=%d)\n", "REPORT_ERASE_MEMORY", report->id, raw_size-1); hid_debug_event(hdev, buff); switch (data->addr_sz) { case 2: snprintf(buff, BUFF_SZ, "\tAddress inside 64 byte block: 0x%02x%02x\n", raw_data[2], raw_data[1]); break; case 3: snprintf(buff, BUFF_SZ, "\tAddress inside 64 byte block: 0x%02x%02x%02x\n", raw_data[3], raw_data[2], raw_data[1]); break; default: snprintf(buff, BUFF_SZ, "\tNot supported\n"); } hid_debug_event(hdev, buff); break; case REPORT_READ_MEMORY: case REPORT_BL_READ_MEMORY: /* 4 data bytes with read area description */ snprintf(buff, BUFF_SZ, "out report %s (%d, size=%d)\n", "REPORT_READ_MEMORY", report->id, raw_size-1); hid_debug_event(hdev, buff); switch (data->addr_sz) { case 2: snprintf(buff, BUFF_SZ, "\tData address: 0x%02x%02x\n", raw_data[2], raw_data[1]); hid_debug_event(hdev, buff); snprintf(buff, BUFF_SZ, "\tData length: %d\n", raw_data[3]); break; case 3: snprintf(buff, BUFF_SZ, "\tData address: 0x%02x%02x%02x\n", raw_data[3], raw_data[2], raw_data[1]); hid_debug_event(hdev, buff); snprintf(buff, BUFF_SZ, "\tData length: %d\n", raw_data[4]); break; default: snprintf(buff, BUFF_SZ, "\tNot supported\n"); } hid_debug_event(hdev, buff); break; case REPORT_WRITE_MEMORY: case REPORT_BL_WRITE_MEMORY: /* 4+1..32 data bytes with write adrea description */ snprintf(buff, BUFF_SZ, "out report %s (%d, size=%d)\n", "REPORT_WRITE_MEMORY", report->id, raw_size-1); hid_debug_event(hdev, buff); switch (data->addr_sz) { case 2: snprintf(buff, BUFF_SZ, "\tData address: 0x%02x%02x\n", raw_data[2], raw_data[1]); hid_debug_event(hdev, buff); snprintf(buff, BUFF_SZ, "\tData length: %d\n", raw_data[3]); hid_debug_event(hdev, buff); if (raw_data[3] == 0) { snprintf(buff, BUFF_SZ, "\tNo data\n"); } else if (raw_data[3] + 4 <= raw_size) { snprintf(buff, BUFF_SZ, "\tData: "); hid_debug_event(hdev, buff); dump_buff_as_hex(buff, BUFF_SZ, raw_data+4, raw_data[3]); } else { snprintf(buff, BUFF_SZ, "\tData overflowed\n"); } break; case 3: snprintf(buff, BUFF_SZ, "\tData address: 0x%02x%02x%02x\n", raw_data[3], raw_data[2], raw_data[1]); hid_debug_event(hdev, buff); snprintf(buff, BUFF_SZ, "\tData length: %d\n", raw_data[4]); hid_debug_event(hdev, buff); if (raw_data[4] == 0) { snprintf(buff, BUFF_SZ, "\tNo data\n"); } else if (raw_data[4] + 5 <= raw_size) { snprintf(buff, BUFF_SZ, "\tData: "); hid_debug_event(hdev, buff); dump_buff_as_hex(buff, BUFF_SZ, raw_data+5, raw_data[4]); } else { snprintf(buff, BUFF_SZ, "\tData overflowed\n"); } break; default: snprintf(buff, BUFF_SZ, "\tNot supported\n"); } hid_debug_event(hdev, buff); break; case REPORT_SPLASH_RESTART: /* TODO */ break; case REPORT_EXIT_KEYBOARD: snprintf(buff, BUFF_SZ, "out report %s (%d, size=%d)\n", "REPORT_EXIT_KEYBOARD", report->id, raw_size-1); hid_debug_event(hdev, buff); snprintf(buff, BUFF_SZ, "\tRestart delay: %dms (0x%02x%02x)\n", raw_data[1] | (raw_data[2] << 8), raw_data[2], raw_data[1]); hid_debug_event(hdev, buff); break; case REPORT_VERSION: snprintf(buff, BUFF_SZ, "out report %s (%d, size=%d)\n", "REPORT_VERSION", report->id, raw_size-1); hid_debug_event(hdev, buff); break; case REPORT_DEVID: snprintf(buff, BUFF_SZ, "out report %s (%d, size=%d)\n", "REPORT_DEVID", report->id, raw_size-1); hid_debug_event(hdev, buff); break; case REPORT_SPLASH_SIZE: snprintf(buff, BUFF_SZ, "out report %s (%d, size=%d)\n", "REPORT_SPLASH_SIZE", report->id, raw_size-1); hid_debug_event(hdev, buff); break; case REPORT_HOOK_VERSION: snprintf(buff, BUFF_SZ, "out report %s (%d, size=%d)\n", "REPORT_HOOK_VERSION", report->id, raw_size-1); hid_debug_event(hdev, buff); break; case REPORT_EXIT_FLASHER: snprintf(buff, BUFF_SZ, "out report %s (%d, size=%d)\n", "REPORT_VERSION", report->id, raw_size-1); hid_debug_event(hdev, buff); snprintf(buff, BUFF_SZ, "\tRestart delay: %dms (0x%02x%02x)\n", raw_data[1] | (raw_data[2] << 8), raw_data[2], raw_data[1]); hid_debug_event(hdev, buff); break; default: snprintf(buff, BUFF_SZ, "out report %s (%d, size=%d)\n", "<unknown>", report->id, raw_size-1); hid_debug_event(hdev, buff); break; } wake_up_interruptible(&hdev->debug_wait); kfree(raw_data); kfree(buff); } void picolcd_debug_raw_event(struct picolcd_data *data, struct hid_device *hdev, struct hid_report *report, u8 *raw_data, int size) { char *buff; #define BUFF_SZ 256 /* Avoid unnecessary overhead if debugfs is disabled */ if (list_empty(&hdev->debug_list)) return; buff = kmalloc(BUFF_SZ, GFP_ATOMIC); if (!buff) return; switch (report->id) { case REPORT_ERROR_CODE: /* 2 data bytes with affected report and error code */ snprintf(buff, BUFF_SZ, "report %s (%d, size=%d)\n", "REPORT_ERROR_CODE", report->id, size-1); hid_debug_event(hdev, buff); if (raw_data[2] < ARRAY_SIZE(error_codes)) snprintf(buff, BUFF_SZ, "\tError code 0x%02x (%s) in reply to report 0x%02x\n", raw_data[2], error_codes[raw_data[2]], raw_data[1]); else snprintf(buff, BUFF_SZ, "\tError code 0x%02x in reply to report 0x%02x\n", raw_data[2], raw_data[1]); hid_debug_event(hdev, buff); break; case REPORT_KEY_STATE: /* 2 data bytes with key state */ snprintf(buff, BUFF_SZ, "report %s (%d, size=%d)\n", "REPORT_KEY_STATE", report->id, size-1); hid_debug_event(hdev, buff); if (raw_data[1] == 0) snprintf(buff, BUFF_SZ, "\tNo key pressed\n"); else if (raw_data[2] == 0) snprintf(buff, BUFF_SZ, "\tOne key pressed: 0x%02x (%d)\n", raw_data[1], raw_data[1]); else snprintf(buff, BUFF_SZ, "\tTwo keys pressed: 0x%02x (%d), 0x%02x (%d)\n", raw_data[1], raw_data[1], raw_data[2], raw_data[2]); hid_debug_event(hdev, buff); break; case REPORT_IR_DATA: /* Up to 20 byes of IR scancode data */ snprintf(buff, BUFF_SZ, "report %s (%d, size=%d)\n", "REPORT_IR_DATA", report->id, size-1); hid_debug_event(hdev, buff); if (raw_data[1] == 0) { snprintf(buff, BUFF_SZ, "\tUnexpectedly 0 data length\n"); hid_debug_event(hdev, buff); } else if (raw_data[1] + 1 <= size) { snprintf(buff, BUFF_SZ, "\tData length: %d\n\tIR Data: ", raw_data[1]); hid_debug_event(hdev, buff); dump_buff_as_hex(buff, BUFF_SZ, raw_data+2, raw_data[1]); hid_debug_event(hdev, buff); } else { snprintf(buff, BUFF_SZ, "\tOverflowing data length: %d\n", raw_data[1]-1); hid_debug_event(hdev, buff); } break; case REPORT_EE_DATA: /* Data buffer in response to REPORT_EE_READ or REPORT_EE_WRITE */ snprintf(buff, BUFF_SZ, "report %s (%d, size=%d)\n", "REPORT_EE_DATA", report->id, size-1); hid_debug_event(hdev, buff); snprintf(buff, BUFF_SZ, "\tData address: 0x%02x%02x\n", raw_data[2], raw_data[1]); hid_debug_event(hdev, buff); snprintf(buff, BUFF_SZ, "\tData length: %d\n", raw_data[3]); hid_debug_event(hdev, buff); if (raw_data[3] == 0) { snprintf(buff, BUFF_SZ, "\tNo data\n"); hid_debug_event(hdev, buff); } else if (raw_data[3] + 4 <= size) { snprintf(buff, BUFF_SZ, "\tData: "); hid_debug_event(hdev, buff); dump_buff_as_hex(buff, BUFF_SZ, raw_data+4, raw_data[3]); hid_debug_event(hdev, buff); } else { snprintf(buff, BUFF_SZ, "\tData overflowed\n"); hid_debug_event(hdev, buff); } break; case REPORT_MEMORY: /* Data buffer in response to REPORT_READ_MEMORY or REPORT_WRITE_MEMORY */ snprintf(buff, BUFF_SZ, "report %s (%d, size=%d)\n", "REPORT_MEMORY", report->id, size-1); hid_debug_event(hdev, buff); switch (data->addr_sz) { case 2: snprintf(buff, BUFF_SZ, "\tData address: 0x%02x%02x\n", raw_data[2], raw_data[1]); hid_debug_event(hdev, buff); snprintf(buff, BUFF_SZ, "\tData length: %d\n", raw_data[3]); hid_debug_event(hdev, buff); if (raw_data[3] == 0) { snprintf(buff, BUFF_SZ, "\tNo data\n"); } else if (raw_data[3] + 4 <= size) { snprintf(buff, BUFF_SZ, "\tData: "); hid_debug_event(hdev, buff); dump_buff_as_hex(buff, BUFF_SZ, raw_data+4, raw_data[3]); } else { snprintf(buff, BUFF_SZ, "\tData overflowed\n"); } break; case 3: snprintf(buff, BUFF_SZ, "\tData address: 0x%02x%02x%02x\n", raw_data[3], raw_data[2], raw_data[1]); hid_debug_event(hdev, buff); snprintf(buff, BUFF_SZ, "\tData length: %d\n", raw_data[4]); hid_debug_event(hdev, buff); if (raw_data[4] == 0) { snprintf(buff, BUFF_SZ, "\tNo data\n"); } else if (raw_data[4] + 5 <= size) { snprintf(buff, BUFF_SZ, "\tData: "); hid_debug_event(hdev, buff); dump_buff_as_hex(buff, BUFF_SZ, raw_data+5, raw_data[4]); } else { snprintf(buff, BUFF_SZ, "\tData overflowed\n"); } break; default: snprintf(buff, BUFF_SZ, "\tNot supported\n"); } hid_debug_event(hdev, buff); break; case REPORT_VERSION: snprintf(buff, BUFF_SZ, "report %s (%d, size=%d)\n", "REPORT_VERSION", report->id, size-1); hid_debug_event(hdev, buff); snprintf(buff, BUFF_SZ, "\tFirmware version: %d.%d\n", raw_data[2], raw_data[1]); hid_debug_event(hdev, buff); break; case REPORT_BL_ERASE_MEMORY: snprintf(buff, BUFF_SZ, "report %s (%d, size=%d)\n", "REPORT_BL_ERASE_MEMORY", report->id, size-1); hid_debug_event(hdev, buff); /* TODO */ break; case REPORT_BL_READ_MEMORY: snprintf(buff, BUFF_SZ, "report %s (%d, size=%d)\n", "REPORT_BL_READ_MEMORY", report->id, size-1); hid_debug_event(hdev, buff); /* TODO */ break; case REPORT_BL_WRITE_MEMORY: snprintf(buff, BUFF_SZ, "report %s (%d, size=%d)\n", "REPORT_BL_WRITE_MEMORY", report->id, size-1); hid_debug_event(hdev, buff); /* TODO */ break; case REPORT_DEVID: snprintf(buff, BUFF_SZ, "report %s (%d, size=%d)\n", "REPORT_DEVID", report->id, size-1); hid_debug_event(hdev, buff); snprintf(buff, BUFF_SZ, "\tSerial: 0x%02x%02x%02x%02x\n", raw_data[1], raw_data[2], raw_data[3], raw_data[4]); hid_debug_event(hdev, buff); snprintf(buff, BUFF_SZ, "\tType: 0x%02x\n", raw_data[5]); hid_debug_event(hdev, buff); break; case REPORT_SPLASH_SIZE: snprintf(buff, BUFF_SZ, "report %s (%d, size=%d)\n", "REPORT_SPLASH_SIZE", report->id, size-1); hid_debug_event(hdev, buff); snprintf(buff, BUFF_SZ, "\tTotal splash space: %d\n", (raw_data[2] << 8) | raw_data[1]); hid_debug_event(hdev, buff); snprintf(buff, BUFF_SZ, "\tUsed splash space: %d\n", (raw_data[4] << 8) | raw_data[3]); hid_debug_event(hdev, buff); break; case REPORT_HOOK_VERSION: snprintf(buff, BUFF_SZ, "report %s (%d, size=%d)\n", "REPORT_HOOK_VERSION", report->id, size-1); hid_debug_event(hdev, buff); snprintf(buff, BUFF_SZ, "\tFirmware version: %d.%d\n", raw_data[1], raw_data[2]); hid_debug_event(hdev, buff); break; default: snprintf(buff, BUFF_SZ, "report %s (%d, size=%d)\n", "<unknown>", report->id, size-1); hid_debug_event(hdev, buff); break; } wake_up_interruptible(&hdev->debug_wait); kfree(buff); } void picolcd_init_devfs(struct picolcd_data *data, struct hid_report *eeprom_r, struct hid_report *eeprom_w, struct hid_report *flash_r, struct hid_report *flash_w, struct hid_report *reset) { struct hid_device *hdev = data->hdev; mutex_init(&data->mutex_flash); /* reset */ if (reset) data->debug_reset = debugfs_create_file("reset", 0600, hdev->debug_dir, data, &picolcd_debug_reset_fops); /* eeprom */ if (eeprom_r || eeprom_w) data->debug_eeprom = debugfs_create_file("eeprom", (eeprom_w ? S_IWUSR : 0) | (eeprom_r ? S_IRUSR : 0), hdev->debug_dir, data, &picolcd_debug_eeprom_fops); /* flash */ if (flash_r && flash_r->maxfield == 1 && flash_r->field[0]->report_size == 8) data->addr_sz = flash_r->field[0]->report_count - 1; else data->addr_sz = -1; if (data->addr_sz == 2 || data->addr_sz == 3) { data->debug_flash = debugfs_create_file("flash", (flash_w ? S_IWUSR : 0) | (flash_r ? S_IRUSR : 0), hdev->debug_dir, data, &picolcd_debug_flash_fops); } else if (flash_r || flash_w) hid_warn(hdev, "Unexpected FLASH access reports, please submit rdesc for review\n"); } void picolcd_exit_devfs(struct picolcd_data *data) { struct dentry *dent; dent = data->debug_reset; data->debug_reset = NULL; debugfs_remove(dent); dent = data->debug_eeprom; data->debug_eeprom = NULL; debugfs_remove(dent); dent = data->debug_flash; data->debug_flash = NULL; debugfs_remove(dent); mutex_destroy(&data->mutex_flash); } |