LXR uboot/common/usb

   1// SPDX-License-Identifier: GPL-2.0+
   2/*
   3 * (C) Copyright 2001
   4 * Denis Peter, MPL AG Switzerland
   5 *
   6 * Part of this source has been derived from the Linux USB
   7 * project.
   8 */
   9#include <common.h>
  10#include <console.h>
  11#include <dm.h>
  12#include <errno.h>
  13#include <malloc.h>
  14#include <memalign.h>
  15#include <stdio_dev.h>
  16#include <watchdog.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
  27extern int overwrite_console(void);
  28#else
  29int 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 */
  60static const unsigned char usb_kbd_numkey[] = {
  61        '1', '2', '3', '4', '5', '6', '7', '8', '9', '0',
  62        '\r', 0x1b, '\b', '\t', ' ', '-', '=', '[', ']',
  63        '\\', '#', ';', '\'', '`', ',', '.', '/'
  64};
  65static const unsigned char usb_kbd_numkey_shifted[] = {
  66        '!', '@', '#', '$', '%', '^', '&', '*', '(', ')',
  67        '\r', 0x1b, '\b', '\t', ' ', '_', '+', '{', '}',
  68        '|', '~', ':', '"', '~', '<', '>', '?'
  69};
  70
  71static 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 */
  82static 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
 104struct 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
 123extern int __maybe_unused net_busy_flag;
 124
 125/* The period of time between two calls of usb_kbd_testc(). */
 126static unsigned long __maybe_unused kbd_testc_tms;
 127
 128/* Puts character in the queue and sets up the in and out pointer. */
 129static 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 */
 153static 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 */
 167static 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
 246static 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 */
 271static 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 */
 301static 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 */
 314static 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 */
 355static 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(sdev->name);
 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 */
 381static 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(sdev->name);
 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                WATCHDOG_RESET();
 393                usb_kbd_poll_for_event(usb_kbd_dev);
 394        }
 395
 396        if (data->usb_out_pointer == USB_KBD_BUFFER_LEN - 1)
 397                data->usb_out_pointer = 0;
 398        else
 399                data->usb_out_pointer++;
 400
 401        return data->usb_kbd_buffer[data->usb_out_pointer];
 402}
 403
 404/* probes the USB device dev for keyboard type. */
 405static int usb_kbd_probe_dev(struct usb_device *dev, unsigned int ifnum)
 406{
 407        struct usb_interface *iface;
 408        struct usb_endpoint_descriptor *ep;
 409        struct usb_kbd_pdata *data;
 410
 411        if (dev->descriptor.bNumConfigurations != 1)
 412                return 0;
 413
 414        iface = &dev->config.if_desc[ifnum];
 415
 416        if (iface->desc.bInterfaceClass != USB_CLASS_HID)
 417                return 0;
 418
 419        if (iface->desc.bInterfaceSubClass != USB_SUB_HID_BOOT)
 420                return 0;
 421
 422        if (iface->desc.bInterfaceProtocol != USB_PROT_HID_KEYBOARD)
 423                return 0;
 424
 425        if (iface->desc.bNumEndpoints != 1)
 426                return 0;
 427
 428        ep = &iface->ep_desc[0];
 429
 430        /* Check if endpoint 1 is interrupt endpoint */
 431        if (!(ep->bEndpointAddress & 0x80))
 432                return 0;
 433
 434        if ((ep->bmAttributes & 3) != 3)
 435                return 0;
 436
 437        debug("USB KBD: found set protocol...\n");
 438
 439        data = malloc(sizeof(struct usb_kbd_pdata));
 440        if (!data) {
 441                printf("USB KBD: Error allocating private data\n");
 442                return 0;
 443        }
 444
 445        /* Clear private data */
 446        memset(data, 0, sizeof(struct usb_kbd_pdata));
 447
 448        /* allocate input buffer aligned and sized to USB DMA alignment */
 449        data->new = memalign(USB_DMA_MINALIGN,
 450                roundup(USB_KBD_BOOT_REPORT_SIZE, USB_DMA_MINALIGN));
 451
 452        /* Insert private data into USB device structure */
 453        dev->privptr = data;
 454
 455        /* Set IRQ handler */
 456        dev->irq_handle = usb_kbd_irq;
 457
 458        data->intpipe = usb_rcvintpipe(dev, ep->bEndpointAddress);
 459        data->intpktsize = min(usb_maxpacket(dev, data->intpipe),
 460                               USB_KBD_BOOT_REPORT_SIZE);
 461        data->intinterval = ep->bInterval;
 462        data->last_report = -1;
 463
 464        /* We found a USB Keyboard, install it. */
 465        usb_set_protocol(dev, iface->desc.bInterfaceNumber, 0);
 466
 467        debug("USB KBD: found set idle...\n");
 468#if !defined(CONFIG_SYS_USB_EVENT_POLL_VIA_CONTROL_EP) && \
 469    !defined(CONFIG_SYS_USB_EVENT_POLL_VIA_INT_QUEUE)
 470        usb_set_idle(dev, iface->desc.bInterfaceNumber, REPEAT_RATE / 4, 0);
 471#else
 472        usb_set_idle(dev, iface->desc.bInterfaceNumber, 0, 0);
 473#endif
 474
 475        debug("USB KBD: enable interrupt pipe...\n");
 476#ifdef CONFIG_SYS_USB_EVENT_POLL_VIA_INT_QUEUE
 477        data->intq = create_int_queue(dev, data->intpipe, 1,
 478                                      USB_KBD_BOOT_REPORT_SIZE, data->new,
 479                                      data->intinterval);
 480        if (!data->intq) {
 481#elif defined(CONFIG_SYS_USB_EVENT_POLL_VIA_CONTROL_EP)
 482        if (usb_get_report(dev, iface->desc.bInterfaceNumber,
 483                           1, 0, data->new, USB_KBD_BOOT_REPORT_SIZE) < 0) {
 484#else
 485        if (usb_submit_int_msg(dev, data->intpipe, data->new, data->intpktsize,
 486                               data->intinterval) < 0) {
 487#endif
 488                printf("Failed to get keyboard state from device %04x:%04x\n",
 489                       dev->descriptor.idVendor, dev->descriptor.idProduct);
 490                /* Abort, we don't want to use that non-functional keyboard. */
 491                return 0;
 492        }
 493
 494        /* Success. */
 495        return 1;
 496}
 497
 498static int probe_usb_keyboard(struct usb_device *dev)
 499{
 500        char *stdinname;
 501        struct stdio_dev usb_kbd_dev;
 502        int error;
 503
 504        /* Try probing the keyboard */
 505        if (usb_kbd_probe_dev(dev, 0) != 1)
 506                return -ENOENT;
 507
 508        /* Register the keyboard */
 509        debug("USB KBD: register.\n");
 510        memset(&usb_kbd_dev, 0, sizeof(struct stdio_dev));
 511        strcpy(usb_kbd_dev.name, DEVNAME);
 512        usb_kbd_dev.flags =  DEV_FLAGS_INPUT;
 513        usb_kbd_dev.getc = usb_kbd_getc;
 514        usb_kbd_dev.tstc = usb_kbd_testc;
 515        usb_kbd_dev.priv = (void *)dev;
 516        error = stdio_register(&usb_kbd_dev);
 517        if (error)
 518                return error;
 519
 520        stdinname = env_get("stdin");
 521#if CONFIG_IS_ENABLED(CONSOLE_MUX)
 522        error = iomux_doenv(stdin, stdinname);
 523        if (error)
 524                return error;
 525#else
 526        /* Check if this is the standard input device. */
 527        if (strcmp(stdinname, DEVNAME))
 528                return 1;
 529
 530        /* Reassign the console */
 531        if (overwrite_console())
 532                return 1;
 533
 534        error = console_assign(stdin, DEVNAME);
 535        if (error)
 536                return error;
 537#endif
 538
 539        return 0;
 540}
 541
 542#if !CONFIG_IS_ENABLED(DM_USB)
 543/* Search for keyboard and register it if found. */
 544int drv_usb_kbd_init(void)
 545{
 546        int error, i;
 547
 548        debug("%s: Probing for keyboard\n", __func__);
 549        /* Scan all USB Devices */
 550        for (i = 0; i < USB_MAX_DEVICE; i++) {
 551                struct usb_device *dev;
 552
 553                /* Get USB device. */
 554                dev = usb_get_dev_index(i);
 555                if (!dev)
 556                        break;
 557
 558                if (dev->devnum == -1)
 559                        continue;
 560
 561                error = probe_usb_keyboard(dev);
 562                if (!error)
 563                        return 1;
 564                if (error && error != -ENOENT)
 565                        return error;
 566        }
 567
 568        /* No USB Keyboard found */
 569        return -1;
 570}
 571
 572/* Deregister the keyboard. */
 573int usb_kbd_deregister(int force)
 574{
 575#if CONFIG_IS_ENABLED(SYS_STDIO_DEREGISTER)
 576        struct stdio_dev *dev;
 577        struct usb_device *usb_kbd_dev;
 578        struct usb_kbd_pdata *data;
 579
 580        dev = stdio_get_by_name(DEVNAME);
 581        if (dev) {
 582                usb_kbd_dev = (struct usb_device *)dev->priv;
 583                data = usb_kbd_dev->privptr;
 584                if (stdio_deregister_dev(dev, force) != 0)
 585                        return 1;
 586#if CONFIG_IS_ENABLED(CONSOLE_MUX)
 587                if (iomux_doenv(stdin, env_get("stdin")) != 0)
 588                        return 1;
 589#endif
 590#ifdef CONFIG_SYS_USB_EVENT_POLL_VIA_INT_QUEUE
 591                destroy_int_queue(usb_kbd_dev, data->intq);
 592#endif
 593                free(data->new);
 594                free(data);
 595        }
 596
 597        return 0;
 598#else
 599        return 1;
 600#endif
 601}
 602
 603#endif
 604
 605#if CONFIG_IS_ENABLED(DM_USB)
 606
 607static int usb_kbd_probe(struct udevice *dev)
 608{
 609        struct usb_device *udev = dev_get_parent_priv(dev);
 610
 611        return probe_usb_keyboard(udev);
 612}
 613
 614static int usb_kbd_remove(struct udevice *dev)
 615{
 616        struct usb_device *udev = dev_get_parent_priv(dev);
 617        struct usb_kbd_pdata *data;
 618        struct stdio_dev *sdev;
 619        int ret;
 620
 621        sdev = stdio_get_by_name(DEVNAME);
 622        if (!sdev) {
 623                ret = -ENXIO;
 624                goto err;
 625        }
 626        data = udev->privptr;
 627        if (stdio_deregister_dev(sdev, true)) {
 628                ret = -EPERM;
 629                goto err;
 630        }
 631#if CONFIG_IS_ENABLED(CONSOLE_MUX)
 632        if (iomux_doenv(stdin, env_get("stdin"))) {
 633                ret = -ENOLINK;
 634                goto err;
 635        }
 636#endif
 637#ifdef CONFIG_SYS_USB_EVENT_POLL_VIA_INT_QUEUE
 638        destroy_int_queue(udev, data->intq);
 639#endif
 640        free(data->new);
 641        free(data);
 642
 643        return 0;
 644err:
 645        printf("%s: warning, ret=%d", __func__, ret);
 646        return ret;
 647}
 648
 649static const struct udevice_id usb_kbd_ids[] = {
 650        { .compatible = "usb-keyboard" },
 651        { }
 652};
 653
 654U_BOOT_DRIVER(usb_kbd) = {
 655        .name   = "usb_kbd",
 656        .id     = UCLASS_KEYBOARD,
 657        .of_match = usb_kbd_ids,
 658        .probe = usb_kbd_probe,
 659        .remove = usb_kbd_remove,
 660};
 661
 662static const struct usb_device_id kbd_id_table[] = {
 663        {
 664                .match_flags = USB_DEVICE_ID_MATCH_INT_CLASS |
 665                        USB_DEVICE_ID_MATCH_INT_SUBCLASS |
 666                        USB_DEVICE_ID_MATCH_INT_PROTOCOL,
 667                .bInterfaceClass = USB_CLASS_HID,
 668                .bInterfaceSubClass = USB_SUB_HID_BOOT,
 669                .bInterfaceProtocol = USB_PROT_HID_KEYBOARD,
 670        },
 671        { }             /* Terminating entry */
 672};
 673
 674U_BOOT_USB_DEVICE(usb_kbd, kbd_id_table);
 675
 676#endif
 677