1 /* 2 * (C) Copyright 2001 3 * Denis Peter, MPL AG Switzerland 4 * 5 * Part of this source has been derived from the Linux USB 6 * project. 7 * 8 * SPDX-License-Identifier: GPL-2.0+ 9 */ 10 #include <common.h> 11 #include <console.h> 12 #include <dm.h> 13 #include <errno.h> 14 #include <malloc.h> 15 #include <memalign.h> 16 #include <stdio_dev.h> 17 #include <asm/byteorder.h> 18 19 #include <usb.h> 20 21 /* 22 * If overwrite_console returns 1, the stdin, stderr and stdout 23 * are switched to the serial port, else the settings in the 24 * environment are used 25 */ 26 #ifdef CONFIG_SYS_CONSOLE_OVERWRITE_ROUTINE 27 extern int overwrite_console(void); 28 #else 29 int overwrite_console(void) 30 { 31 return 0; 32 } 33 #endif 34 35 /* Keyboard sampling rate */ 36 #define REPEAT_RATE 40 /* 40msec -> 25cps */ 37 #define REPEAT_DELAY 10 /* 10 x REPEAT_RATE = 400msec */ 38 39 #define NUM_LOCK 0x53 40 #define CAPS_LOCK 0x39 41 #define SCROLL_LOCK 0x47 42 43 /* Modifier bits */ 44 #define LEFT_CNTR (1 << 0) 45 #define LEFT_SHIFT (1 << 1) 46 #define LEFT_ALT (1 << 2) 47 #define LEFT_GUI (1 << 3) 48 #define RIGHT_CNTR (1 << 4) 49 #define RIGHT_SHIFT (1 << 5) 50 #define RIGHT_ALT (1 << 6) 51 #define RIGHT_GUI (1 << 7) 52 53 /* Size of the keyboard buffer */ 54 #define USB_KBD_BUFFER_LEN 0x20 55 56 /* Device name */ 57 #define DEVNAME "usbkbd" 58 59 /* Keyboard maps */ 60 static const unsigned char usb_kbd_numkey[] = { 61 '1', '2', '3', '4', '5', '6', '7', '8', '9', '0', 62 '\r', 0x1b, '\b', '\t', ' ', '-', '=', '[', ']', 63 '\\', '#', ';', '\'', '`', ',', '.', '/' 64 }; 65 static const unsigned char usb_kbd_numkey_shifted[] = { 66 '!', '@', '#', '$', '%', '^', '&', '*', '(', ')', 67 '\r', 0x1b, '\b', '\t', ' ', '_', '+', '{', '}', 68 '|', '~', ':', '"', '~', '<', '>', '?' 69 }; 70 71 static const unsigned char usb_kbd_num_keypad[] = { 72 '/', '*', '-', '+', '\r', 73 '1', '2', '3', '4', '5', '6', '7', '8', '9', '0', 74 '.', 0, 0, 0, '=' 75 }; 76 77 /* 78 * map arrow keys to ^F/^B ^N/^P, can't really use the proper 79 * ANSI sequence for arrow keys because the queuing code breaks 80 * when a single keypress expands to 3 queue elements 81 */ 82 static const unsigned char usb_kbd_arrow[] = { 83 0x6, 0x2, 0xe, 0x10 84 }; 85 86 /* 87 * NOTE: It's important for the NUM, CAPS, SCROLL-lock bits to be in this 88 * order. See usb_kbd_setled() function! 89 */ 90 #define USB_KBD_NUMLOCK (1 << 0) 91 #define USB_KBD_CAPSLOCK (1 << 1) 92 #define USB_KBD_SCROLLLOCK (1 << 2) 93 #define USB_KBD_CTRL (1 << 3) 94 95 #define USB_KBD_LEDMASK \ 96 (USB_KBD_NUMLOCK | USB_KBD_CAPSLOCK | USB_KBD_SCROLLLOCK) 97 98 /* 99 * USB Keyboard reports are 8 bytes in boot protocol. 100 * Appendix B of HID Device Class Definition 1.11 101 */ 102 #define USB_KBD_BOOT_REPORT_SIZE 8 103 104 struct usb_kbd_pdata { 105 unsigned long intpipe; 106 int intpktsize; 107 int intinterval; 108 unsigned long last_report; 109 struct int_queue *intq; 110 111 uint32_t repeat_delay; 112 113 uint32_t usb_in_pointer; 114 uint32_t usb_out_pointer; 115 uint8_t usb_kbd_buffer[USB_KBD_BUFFER_LEN]; 116 117 uint8_t *new; 118 uint8_t old[USB_KBD_BOOT_REPORT_SIZE]; 119 120 uint8_t flags; 121 }; 122 123 extern int __maybe_unused net_busy_flag; 124 125 /* The period of time between two calls of usb_kbd_testc(). */ 126 static unsigned long __maybe_unused kbd_testc_tms; 127 128 /* Puts character in the queue and sets up the in and out pointer. */ 129 static void usb_kbd_put_queue(struct usb_kbd_pdata *data, char c) 130 { 131 if (data->usb_in_pointer == USB_KBD_BUFFER_LEN - 1) { 132 /* Check for buffer full. */ 133 if (data->usb_out_pointer == 0) 134 return; 135 136 data->usb_in_pointer = 0; 137 } else { 138 /* Check for buffer full. */ 139 if (data->usb_in_pointer == data->usb_out_pointer - 1) 140 return; 141 142 data->usb_in_pointer++; 143 } 144 145 data->usb_kbd_buffer[data->usb_in_pointer] = c; 146 } 147 148 /* 149 * Set the LEDs. Since this is used in the irq routine, the control job is 150 * issued with a timeout of 0. This means, that the job is queued without 151 * waiting for job completion. 152 */ 153 static void usb_kbd_setled(struct usb_device *dev) 154 { 155 struct usb_interface *iface = &dev->config.if_desc[0]; 156 struct usb_kbd_pdata *data = dev->privptr; 157 ALLOC_ALIGN_BUFFER(uint32_t, leds, 1, USB_DMA_MINALIGN); 158 159 *leds = data->flags & USB_KBD_LEDMASK; 160 usb_control_msg(dev, usb_sndctrlpipe(dev, 0), 161 USB_REQ_SET_REPORT, USB_TYPE_CLASS | USB_RECIP_INTERFACE, 162 0x200, iface->desc.bInterfaceNumber, leds, 1, 0); 163 } 164 165 #define CAPITAL_MASK 0x20 166 /* Translate the scancode in ASCII */ 167 static int usb_kbd_translate(struct usb_kbd_pdata *data, unsigned char scancode, 168 unsigned char modifier, int pressed) 169 { 170 uint8_t keycode = 0; 171 172 /* Key released */ 173 if (pressed == 0) { 174 data->repeat_delay = 0; 175 return 0; 176 } 177 178 if (pressed == 2) { 179 data->repeat_delay++; 180 if (data->repeat_delay < REPEAT_DELAY) 181 return 0; 182 183 data->repeat_delay = REPEAT_DELAY; 184 } 185 186 /* Alphanumeric values */ 187 if ((scancode > 3) && (scancode <= 0x1d)) { 188 keycode = scancode - 4 + 'a'; 189 190 if (data->flags & USB_KBD_CAPSLOCK) 191 keycode &= ~CAPITAL_MASK; 192 193 if (modifier & (LEFT_SHIFT | RIGHT_SHIFT)) { 194 /* Handle CAPSLock + Shift pressed simultaneously */ 195 if (keycode & CAPITAL_MASK) 196 keycode &= ~CAPITAL_MASK; 197 else 198 keycode |= CAPITAL_MASK; 199 } 200 } 201 202 if ((scancode > 0x1d) && (scancode < 0x39)) { 203 /* Shift pressed */ 204 if (modifier & (LEFT_SHIFT | RIGHT_SHIFT)) 205 keycode = usb_kbd_numkey_shifted[scancode - 0x1e]; 206 else 207 keycode = usb_kbd_numkey[scancode - 0x1e]; 208 } 209 210 /* Arrow keys */ 211 if ((scancode >= 0x4f) && (scancode <= 0x52)) 212 keycode = usb_kbd_arrow[scancode - 0x4f]; 213 214 /* Numeric keypad */ 215 if ((scancode >= 0x54) && (scancode <= 0x67)) 216 keycode = usb_kbd_num_keypad[scancode - 0x54]; 217 218 if (data->flags & USB_KBD_CTRL) 219 keycode = scancode - 0x3; 220 221 if (pressed == 1) { 222 if (scancode == NUM_LOCK) { 223 data->flags ^= USB_KBD_NUMLOCK; 224 return 1; 225 } 226 227 if (scancode == CAPS_LOCK) { 228 data->flags ^= USB_KBD_CAPSLOCK; 229 return 1; 230 } 231 if (scancode == SCROLL_LOCK) { 232 data->flags ^= USB_KBD_SCROLLLOCK; 233 return 1; 234 } 235 } 236 237 /* Report keycode if any */ 238 if (keycode) { 239 debug("%c", keycode); 240 usb_kbd_put_queue(data, keycode); 241 } 242 243 return 0; 244 } 245 246 static uint32_t usb_kbd_service_key(struct usb_device *dev, int i, int up) 247 { 248 uint32_t res = 0; 249 struct usb_kbd_pdata *data = dev->privptr; 250 uint8_t *new; 251 uint8_t *old; 252 253 if (up) { 254 new = data->old; 255 old = data->new; 256 } else { 257 new = data->new; 258 old = data->old; 259 } 260 261 if ((old[i] > 3) && 262 (memscan(new + 2, old[i], USB_KBD_BOOT_REPORT_SIZE - 2) == 263 new + USB_KBD_BOOT_REPORT_SIZE)) { 264 res |= usb_kbd_translate(data, old[i], data->new[0], up); 265 } 266 267 return res; 268 } 269 270 /* Interrupt service routine */ 271 static int usb_kbd_irq_worker(struct usb_device *dev) 272 { 273 struct usb_kbd_pdata *data = dev->privptr; 274 int i, res = 0; 275 276 /* No combo key pressed */ 277 if (data->new[0] == 0x00) 278 data->flags &= ~USB_KBD_CTRL; 279 /* Left or Right Ctrl pressed */ 280 else if ((data->new[0] == LEFT_CNTR) || (data->new[0] == RIGHT_CNTR)) 281 data->flags |= USB_KBD_CTRL; 282 283 for (i = 2; i < USB_KBD_BOOT_REPORT_SIZE; i++) { 284 res |= usb_kbd_service_key(dev, i, 0); 285 res |= usb_kbd_service_key(dev, i, 1); 286 } 287 288 /* Key is still pressed */ 289 if ((data->new[2] > 3) && (data->old[2] == data->new[2])) 290 res |= usb_kbd_translate(data, data->new[2], data->new[0], 2); 291 292 if (res == 1) 293 usb_kbd_setled(dev); 294 295 memcpy(data->old, data->new, USB_KBD_BOOT_REPORT_SIZE); 296 297 return 1; 298 } 299 300 /* Keyboard interrupt handler */ 301 static int usb_kbd_irq(struct usb_device *dev) 302 { 303 if ((dev->irq_status != 0) || 304 (dev->irq_act_len != USB_KBD_BOOT_REPORT_SIZE)) { 305 debug("USB KBD: Error %lX, len %d\n", 306 dev->irq_status, dev->irq_act_len); 307 return 1; 308 } 309 310 return usb_kbd_irq_worker(dev); 311 } 312 313 /* Interrupt polling */ 314 static inline void usb_kbd_poll_for_event(struct usb_device *dev) 315 { 316 #if defined(CONFIG_SYS_USB_EVENT_POLL) 317 struct usb_kbd_pdata *data = dev->privptr; 318 319 /* Submit a interrupt transfer request */ 320 usb_submit_int_msg(dev, data->intpipe, &data->new[0], data->intpktsize, 321 data->intinterval); 322 323 usb_kbd_irq_worker(dev); 324 #elif defined(CONFIG_SYS_USB_EVENT_POLL_VIA_CONTROL_EP) || \ 325 defined(CONFIG_SYS_USB_EVENT_POLL_VIA_INT_QUEUE) 326 #if defined(CONFIG_SYS_USB_EVENT_POLL_VIA_CONTROL_EP) 327 struct usb_interface *iface; 328 struct usb_kbd_pdata *data = dev->privptr; 329 iface = &dev->config.if_desc[0]; 330 usb_get_report(dev, iface->desc.bInterfaceNumber, 331 1, 0, data->new, USB_KBD_BOOT_REPORT_SIZE); 332 if (memcmp(data->old, data->new, USB_KBD_BOOT_REPORT_SIZE)) { 333 usb_kbd_irq_worker(dev); 334 #else 335 struct usb_kbd_pdata *data = dev->privptr; 336 if (poll_int_queue(dev, data->intq)) { 337 usb_kbd_irq_worker(dev); 338 /* We've consumed all queued int packets, create new */ 339 destroy_int_queue(dev, data->intq); 340 data->intq = create_int_queue(dev, data->intpipe, 1, 341 USB_KBD_BOOT_REPORT_SIZE, data->new, 342 data->intinterval); 343 #endif 344 data->last_report = get_timer(0); 345 /* Repeat last usb hid report every REPEAT_RATE ms for keyrepeat */ 346 } else if (data->last_report != -1 && 347 get_timer(data->last_report) > REPEAT_RATE) { 348 usb_kbd_irq_worker(dev); 349 data->last_report = get_timer(0); 350 } 351 #endif 352 } 353 354 /* test if a character is in the queue */ 355 static int usb_kbd_testc(struct stdio_dev *sdev) 356 { 357 struct stdio_dev *dev; 358 struct usb_device *usb_kbd_dev; 359 struct usb_kbd_pdata *data; 360 361 #ifdef CONFIG_CMD_NET 362 /* 363 * If net_busy_flag is 1, NET transfer is running, 364 * then we check key-pressed every second (first check may be 365 * less than 1 second) to improve TFTP booting performance. 366 */ 367 if (net_busy_flag && (get_timer(kbd_testc_tms) < CONFIG_SYS_HZ)) 368 return 0; 369 kbd_testc_tms = get_timer(0); 370 #endif 371 dev = stdio_get_by_name(DEVNAME); 372 usb_kbd_dev = (struct usb_device *)dev->priv; 373 data = usb_kbd_dev->privptr; 374 375 usb_kbd_poll_for_event(usb_kbd_dev); 376 377 return !(data->usb_in_pointer == data->usb_out_pointer); 378 } 379 380 /* gets the character from the queue */ 381 static int usb_kbd_getc(struct stdio_dev *sdev) 382 { 383 struct stdio_dev *dev; 384 struct usb_device *usb_kbd_dev; 385 struct usb_kbd_pdata *data; 386 387 dev = stdio_get_by_name(DEVNAME); 388 usb_kbd_dev = (struct usb_device *)dev->priv; 389 data = usb_kbd_dev->privptr; 390 391 while (data->usb_in_pointer == data->usb_out_pointer) 392 usb_kbd_poll_for_event(usb_kbd_dev); 393 394 if (data->usb_out_pointer == USB_KBD_BUFFER_LEN - 1) 395 data->usb_out_pointer = 0; 396 else 397 data->usb_out_pointer++; 398 399 return data->usb_kbd_buffer[data->usb_out_pointer]; 400 } 401 402 /* probes the USB device dev for keyboard type. */ 403 static int usb_kbd_probe_dev(struct usb_device *dev, unsigned int ifnum) 404 { 405 struct usb_interface *iface; 406 struct usb_endpoint_descriptor *ep; 407 struct usb_kbd_pdata *data; 408 409 if (dev->descriptor.bNumConfigurations != 1) 410 return 0; 411 412 iface = &dev->config.if_desc[ifnum]; 413 414 if (iface->desc.bInterfaceClass != USB_CLASS_HID) 415 return 0; 416 417 if (iface->desc.bInterfaceSubClass != USB_SUB_HID_BOOT) 418 return 0; 419 420 if (iface->desc.bInterfaceProtocol != USB_PROT_HID_KEYBOARD) 421 return 0; 422 423 if (iface->desc.bNumEndpoints != 1) 424 return 0; 425 426 ep = &iface->ep_desc[0]; 427 428 /* Check if endpoint 1 is interrupt endpoint */ 429 if (!(ep->bEndpointAddress & 0x80)) 430 return 0; 431 432 if ((ep->bmAttributes & 3) != 3) 433 return 0; 434 435 debug("USB KBD: found set protocol...\n"); 436 437 data = malloc(sizeof(struct usb_kbd_pdata)); 438 if (!data) { 439 printf("USB KBD: Error allocating private data\n"); 440 return 0; 441 } 442 443 /* Clear private data */ 444 memset(data, 0, sizeof(struct usb_kbd_pdata)); 445 446 /* allocate input buffer aligned and sized to USB DMA alignment */ 447 data->new = memalign(USB_DMA_MINALIGN, 448 roundup(USB_KBD_BOOT_REPORT_SIZE, USB_DMA_MINALIGN)); 449 450 /* Insert private data into USB device structure */ 451 dev->privptr = data; 452 453 /* Set IRQ handler */ 454 dev->irq_handle = usb_kbd_irq; 455 456 data->intpipe = usb_rcvintpipe(dev, ep->bEndpointAddress); 457 data->intpktsize = min(usb_maxpacket(dev, data->intpipe), 458 USB_KBD_BOOT_REPORT_SIZE); 459 data->intinterval = ep->bInterval; 460 data->last_report = -1; 461 462 /* We found a USB Keyboard, install it. */ 463 usb_set_protocol(dev, iface->desc.bInterfaceNumber, 0); 464 465 debug("USB KBD: found set idle...\n"); 466 #if !defined(CONFIG_SYS_USB_EVENT_POLL_VIA_CONTROL_EP) && \ 467 !defined(CONFIG_SYS_USB_EVENT_POLL_VIA_INT_QUEUE) 468 usb_set_idle(dev, iface->desc.bInterfaceNumber, REPEAT_RATE / 4, 0); 469 #else 470 usb_set_idle(dev, iface->desc.bInterfaceNumber, 0, 0); 471 #endif 472 473 debug("USB KBD: enable interrupt pipe...\n"); 474 #ifdef CONFIG_SYS_USB_EVENT_POLL_VIA_INT_QUEUE 475 data->intq = create_int_queue(dev, data->intpipe, 1, 476 USB_KBD_BOOT_REPORT_SIZE, data->new, 477 data->intinterval); 478 if (!data->intq) { 479 #elif defined(CONFIG_SYS_USB_EVENT_POLL_VIA_CONTROL_EP) 480 if (usb_get_report(dev, iface->desc.bInterfaceNumber, 481 1, 0, data->new, USB_KBD_BOOT_REPORT_SIZE) < 0) { 482 #else 483 if (usb_submit_int_msg(dev, data->intpipe, data->new, data->intpktsize, 484 data->intinterval) < 0) { 485 #endif 486 printf("Failed to get keyboard state from device %04x:%04x\n", 487 dev->descriptor.idVendor, dev->descriptor.idProduct); 488 /* Abort, we don't want to use that non-functional keyboard. */ 489 return 0; 490 } 491 492 /* Success. */ 493 return 1; 494 } 495 496 static int probe_usb_keyboard(struct usb_device *dev) 497 { 498 char *stdinname; 499 struct stdio_dev usb_kbd_dev; 500 int error; 501 502 /* Try probing the keyboard */ 503 if (usb_kbd_probe_dev(dev, 0) != 1) 504 return -ENOENT; 505 506 /* Register the keyboard */ 507 debug("USB KBD: register.\n"); 508 memset(&usb_kbd_dev, 0, sizeof(struct stdio_dev)); 509 strcpy(usb_kbd_dev.name, DEVNAME); 510 usb_kbd_dev.flags = DEV_FLAGS_INPUT; 511 usb_kbd_dev.getc = usb_kbd_getc; 512 usb_kbd_dev.tstc = usb_kbd_testc; 513 usb_kbd_dev.priv = (void *)dev; 514 error = stdio_register(&usb_kbd_dev); 515 if (error) 516 return error; 517 518 stdinname = getenv("stdin"); 519 #ifdef CONFIG_CONSOLE_MUX 520 error = iomux_doenv(stdin, stdinname); 521 if (error) 522 return error; 523 #else 524 /* Check if this is the standard input device. */ 525 if (strcmp(stdinname, DEVNAME)) 526 return 1; 527 528 /* Reassign the console */ 529 if (overwrite_console()) 530 return 1; 531 532 error = console_assign(stdin, DEVNAME); 533 if (error) 534 return error; 535 #endif 536 537 return 0; 538 } 539 540 #ifndef CONFIG_DM_USB 541 /* Search for keyboard and register it if found. */ 542 int drv_usb_kbd_init(void) 543 { 544 int error, i; 545 546 debug("%s: Probing for keyboard\n", __func__); 547 /* Scan all USB Devices */ 548 for (i = 0; i < USB_MAX_DEVICE; i++) { 549 struct usb_device *dev; 550 551 /* Get USB device. */ 552 dev = usb_get_dev_index(i); 553 if (!dev) 554 break; 555 556 if (dev->devnum == -1) 557 continue; 558 559 error = probe_usb_keyboard(dev); 560 if (!error) 561 return 1; 562 if (error && error != -ENOENT) 563 return error; 564 } 565 566 /* No USB Keyboard found */ 567 return -1; 568 } 569 570 /* Deregister the keyboard. */ 571 int usb_kbd_deregister(int force) 572 { 573 #if CONFIG_IS_ENABLED(SYS_STDIO_DEREGISTER) 574 struct stdio_dev *dev; 575 struct usb_device *usb_kbd_dev; 576 struct usb_kbd_pdata *data; 577 578 dev = stdio_get_by_name(DEVNAME); 579 if (dev) { 580 usb_kbd_dev = (struct usb_device *)dev->priv; 581 data = usb_kbd_dev->privptr; 582 if (stdio_deregister_dev(dev, force) != 0) 583 return 1; 584 #ifdef CONFIG_CONSOLE_MUX 585 if (iomux_doenv(stdin, getenv("stdin")) != 0) 586 return 1; 587 #endif 588 #ifdef CONFIG_SYS_USB_EVENT_POLL_VIA_INT_QUEUE 589 destroy_int_queue(usb_kbd_dev, data->intq); 590 #endif 591 free(data->new); 592 free(data); 593 } 594 595 return 0; 596 #else 597 return 1; 598 #endif 599 } 600 601 #endif 602 603 #ifdef CONFIG_DM_USB 604 605 static int usb_kbd_probe(struct udevice *dev) 606 { 607 struct usb_device *udev = dev_get_parent_priv(dev); 608 609 return probe_usb_keyboard(udev); 610 } 611 612 static int usb_kbd_remove(struct udevice *dev) 613 { 614 struct usb_device *udev = dev_get_parent_priv(dev); 615 struct usb_kbd_pdata *data; 616 struct stdio_dev *sdev; 617 int ret; 618 619 sdev = stdio_get_by_name(DEVNAME); 620 if (!sdev) { 621 ret = -ENXIO; 622 goto err; 623 } 624 data = udev->privptr; 625 if (stdio_deregister_dev(sdev, true)) { 626 ret = -EPERM; 627 goto err; 628 } 629 #ifdef CONFIG_CONSOLE_MUX 630 if (iomux_doenv(stdin, getenv("stdin"))) { 631 ret = -ENOLINK; 632 goto err; 633 } 634 #endif 635 #ifdef CONFIG_SYS_USB_EVENT_POLL_VIA_INT_QUEUE 636 destroy_int_queue(udev, data->intq); 637 #endif 638 free(data->new); 639 free(data); 640 641 return 0; 642 err: 643 printf("%s: warning, ret=%d", __func__, ret); 644 return ret; 645 } 646 647 static const struct udevice_id usb_kbd_ids[] = { 648 { .compatible = "usb-keyboard" }, 649 { } 650 }; 651 652 U_BOOT_DRIVER(usb_kbd) = { 653 .name = "usb_kbd", 654 .id = UCLASS_KEYBOARD, 655 .of_match = usb_kbd_ids, 656 .probe = usb_kbd_probe, 657 .remove = usb_kbd_remove, 658 }; 659 660 static const struct usb_device_id kbd_id_table[] = { 661 { 662 .match_flags = USB_DEVICE_ID_MATCH_INT_CLASS | 663 USB_DEVICE_ID_MATCH_INT_SUBCLASS | 664 USB_DEVICE_ID_MATCH_INT_PROTOCOL, 665 .bInterfaceClass = USB_CLASS_HID, 666 .bInterfaceSubClass = USB_SUB_HID_BOOT, 667 .bInterfaceProtocol = USB_PROT_HID_KEYBOARD, 668 }, 669 { } /* Terminating entry */ 670 }; 671 672 U_BOOT_USB_DEVICE(usb_kbd, kbd_id_table); 673 674 #endif 675