common/usb_kbd.c

   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 = env_get("stdin");
 519 #if CONFIG_IS_ENABLED(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 #if CONFIG_IS_ENABLED(CONSOLE_MUX)
 585                 if (iomux_doenv(stdin, env_get("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 #if CONFIG_IS_ENABLED(CONSOLE_MUX)
 630         if (iomux_doenv(stdin, env_get("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