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 <env.h>
  13#include <errno.h>
  14#include <log.h>
  15#include <malloc.h>
  16#include <memalign.h>
  17#include <stdio_dev.h>
  18#include <watchdog.h>
  19#include <asm/byteorder.h>
  20
  21#include <usb.h>
  22
  23/*
  24 * If overwrite_console returns 1, the stdin, stderr and stdout
  25 * are switched to the serial port, else the settings in the
  26 * environment are used
  27 */
  28#ifdef CONFIG_SYS_CONSOLE_OVERWRITE_ROUTINE
  29extern int overwrite_console(void);
  30#else
  31int overwrite_console(void)
  32{
  33        return 0;
  34}
  35#endif
  36
  37/* Keyboard sampling rate */
  38#define REPEAT_RATE     40              /* 40msec -> 25cps */
  39#define REPEAT_DELAY    10              /* 10 x REPEAT_RATE = 400msec */
  40
  41#define NUM_LOCK        0x53
  42#define CAPS_LOCK       0x39
  43#define SCROLL_LOCK     0x47
  44
  45/* Modifier bits */
  46#define LEFT_CNTR       (1 << 0)
  47#define LEFT_SHIFT      (1 << 1)
  48#define LEFT_ALT        (1 << 2)
  49#define LEFT_GUI        (1 << 3)
  50#define RIGHT_CNTR      (1 << 4)
  51#define RIGHT_SHIFT     (1 << 5)
  52#define RIGHT_ALT       (1 << 6)
  53#define RIGHT_GUI       (1 << 7)
  54
  55/* Size of the keyboard buffer */
  56#define USB_KBD_BUFFER_LEN      0x20
  57
  58/* Device name */
  59#define DEVNAME                 "usbkbd"
  60
  61/* Keyboard maps */
  62static const unsigned char usb_kbd_numkey[] = {
  63        '1', '2', '3', '4', '5', '6', '7', '8', '9', '0',
  64        '\r', 0x1b, '\b', '\t', ' ', '-', '=', '[', ']',
  65        '\\', '#', ';', '\'', '`', ',', '.', '/'
  66};
  67static const unsigned char usb_kbd_numkey_shifted[] = {
  68        '!', '@', '#', '$', '%', '^', '&', '*', '(', ')',
  69        '\r', 0x1b, '\b', '\t', ' ', '_', '+', '{', '}',
  70        '|', '~', ':', '"', '~', '<', '>', '?'
  71};
  72
  73static const unsigned char usb_kbd_num_keypad[] = {
  74        '/', '*', '-', '+', '\r',
  75        '1', '2', '3', '4', '5', '6', '7', '8', '9', '0',
  76        '.', 0, 0, 0, '='
  77};
  78
  79static const u8 usb_special_keys[] = {
  80#ifdef CONFIG_USB_KEYBOARD_FN_KEYS
  81        '2', 'H', '5', '3', 'F', '6', 'C', 'D', 'B', 'A'
  82#else
  83        'C', 'D', 'B', 'A'
  84#endif
  85};
  86
  87/*
  88 * NOTE: It's important for the NUM, CAPS, SCROLL-lock bits to be in this
  89 *       order. See usb_kbd_setled() function!
  90 */
  91#define USB_KBD_NUMLOCK         (1 << 0)
  92#define USB_KBD_CAPSLOCK        (1 << 1)
  93#define USB_KBD_SCROLLLOCK      (1 << 2)
  94#define USB_KBD_CTRL            (1 << 3)
  95
  96#define USB_KBD_LEDMASK         \
  97        (USB_KBD_NUMLOCK | USB_KBD_CAPSLOCK | USB_KBD_SCROLLLOCK)
  98
  99struct usb_kbd_pdata {
 100        unsigned long   intpipe;
 101        int             intpktsize;
 102        int             intinterval;
 103        unsigned long   last_report;
 104        struct int_queue *intq;
 105
 106        uint32_t        repeat_delay;
 107
 108        uint32_t        usb_in_pointer;
 109        uint32_t        usb_out_pointer;
 110        uint8_t         usb_kbd_buffer[USB_KBD_BUFFER_LEN];
 111
 112        uint8_t         *new;
 113        uint8_t         old[USB_KBD_BOOT_REPORT_SIZE];
 114
 115        uint8_t         flags;
 116};
 117
 118extern int __maybe_unused net_busy_flag;
 119
 120/* The period of time between two calls of usb_kbd_testc(). */
 121static unsigned long __maybe_unused kbd_testc_tms;
 122
 123/* Puts character in the queue and sets up the in and out pointer. */
 124static void usb_kbd_put_queue(struct usb_kbd_pdata *data, u8 c)
 125{
 126        if (data->usb_in_pointer == USB_KBD_BUFFER_LEN - 1) {
 127                /* Check for buffer full. */
 128                if (data->usb_out_pointer == 0)
 129                        return;
 130
 131                data->usb_in_pointer = 0;
 132        } else {
 133                /* Check for buffer full. */
 134                if (data->usb_in_pointer == data->usb_out_pointer - 1)
 135                        return;
 136
 137                data->usb_in_pointer++;
 138        }
 139
 140        data->usb_kbd_buffer[data->usb_in_pointer] = c;
 141}
 142
 143/*
 144 * Set the LEDs. Since this is used in the irq routine, the control job is
 145 * issued with a timeout of 0. This means, that the job is queued without
 146 * waiting for job completion.
 147 */
 148static void usb_kbd_setled(struct usb_device *dev)
 149{
 150        struct usb_interface *iface = &dev->config.if_desc[0];
 151        struct usb_kbd_pdata *data = dev->privptr;
 152        ALLOC_ALIGN_BUFFER(uint32_t, leds, 1, USB_DMA_MINALIGN);
 153
 154        *leds = data->flags & USB_KBD_LEDMASK;
 155        usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
 156                USB_REQ_SET_REPORT, USB_TYPE_CLASS | USB_RECIP_INTERFACE,
 157                0x200, iface->desc.bInterfaceNumber, leds, 1, 0);
 158}
 159
 160#define CAPITAL_MASK    0x20
 161/* Translate the scancode in ASCII */
 162static int usb_kbd_translate(struct usb_kbd_pdata *data, unsigned char scancode,
 163                                unsigned char modifier, int pressed)
 164{
 165        uint8_t keycode = 0;
 166
 167        /* Key released */
 168        if (pressed == 0) {
 169                data->repeat_delay = 0;
 170                return 0;
 171        }
 172
 173        if (pressed == 2) {
 174                data->repeat_delay++;
 175                if (data->repeat_delay < REPEAT_DELAY)
 176                        return 0;
 177
 178                data->repeat_delay = REPEAT_DELAY;
 179        }
 180
 181        /* Alphanumeric values */
 182        if ((scancode > 3) && (scancode <= 0x1d)) {
 183                keycode = scancode - 4 + 'a';
 184
 185                if (data->flags & USB_KBD_CAPSLOCK)
 186                        keycode &= ~CAPITAL_MASK;
 187
 188                if (modifier & (LEFT_SHIFT | RIGHT_SHIFT)) {
 189                        /* Handle CAPSLock + Shift pressed simultaneously */
 190                        if (keycode & CAPITAL_MASK)
 191                                keycode &= ~CAPITAL_MASK;
 192                        else
 193                                keycode |= CAPITAL_MASK;
 194                }
 195        }
 196
 197        if ((scancode > 0x1d) && (scancode < 0x39)) {
 198                /* Shift pressed */
 199                if (modifier & (LEFT_SHIFT | RIGHT_SHIFT))
 200                        keycode = usb_kbd_numkey_shifted[scancode - 0x1e];
 201                else
 202                        keycode = usb_kbd_numkey[scancode - 0x1e];
 203        }
 204
 205        /* Numeric keypad */
 206        if ((scancode >= 0x54) && (scancode <= 0x67))
 207                keycode = usb_kbd_num_keypad[scancode - 0x54];
 208
 209        if (data->flags & USB_KBD_CTRL)
 210                keycode = scancode - 0x3;
 211
 212        if (pressed == 1) {
 213                if (scancode == NUM_LOCK) {
 214                        data->flags ^= USB_KBD_NUMLOCK;
 215                        return 1;
 216                }
 217
 218                if (scancode == CAPS_LOCK) {
 219                        data->flags ^= USB_KBD_CAPSLOCK;
 220                        return 1;
 221                }
 222                if (scancode == SCROLL_LOCK) {
 223                        data->flags ^= USB_KBD_SCROLLLOCK;
 224                        return 1;
 225                }
 226        }
 227
 228        /* Report keycode if any */
 229        if (keycode) {
 230                debug("%c", keycode);
 231                usb_kbd_put_queue(data, keycode);
 232                return 0;
 233        }
 234
 235#ifdef CONFIG_USB_KEYBOARD_FN_KEYS
 236        if (scancode < 0x3a || scancode > 0x52 ||
 237            scancode == 0x46 || scancode == 0x47)
 238                return 1;
 239
 240        usb_kbd_put_queue(data, 0x1b);
 241        if (scancode < 0x3e) {
 242                /* F1 - F4 */
 243                usb_kbd_put_queue(data, 0x4f);
 244                usb_kbd_put_queue(data, scancode - 0x3a + 'P');
 245                return 0;
 246        }
 247        usb_kbd_put_queue(data, '[');
 248        if (scancode < 0x42) {
 249                /* F5 - F8 */
 250                usb_kbd_put_queue(data, '1');
 251                if (scancode == 0x3e)
 252                        --scancode;
 253                keycode = scancode - 0x3f + '7';
 254        } else if (scancode < 0x49) {
 255                /* F9 - F12 */
 256                usb_kbd_put_queue(data, '2');
 257                if (scancode > 0x43)
 258                        ++scancode;
 259                keycode = scancode - 0x42 + '0';
 260        } else {
 261                /*
 262                 * INSERT, HOME, PAGE UP, DELETE, END, PAGE DOWN,
 263                 * RIGHT, LEFT, DOWN, UP
 264                 */
 265                keycode = usb_special_keys[scancode - 0x49];
 266        }
 267        usb_kbd_put_queue(data, keycode);
 268        if (scancode < 0x4f && scancode != 0x4a && scancode != 0x4d)
 269                usb_kbd_put_queue(data, '~');
 270        return 0;
 271#else
 272        /* Left, Right, Up, Down */
 273        if (scancode > 0x4e && scancode < 0x53) {
 274                usb_kbd_put_queue(data, 0x1b);
 275                usb_kbd_put_queue(data, '[');
 276                usb_kbd_put_queue(data, usb_special_keys[scancode - 0x4f]);
 277                return 0;
 278        }
 279        return 1;
 280#endif /* CONFIG_USB_KEYBOARD_FN_KEYS */
 281}
 282
 283static uint32_t usb_kbd_service_key(struct usb_device *dev, int i, int up)
 284{
 285        uint32_t res = 0;
 286        struct usb_kbd_pdata *data = dev->privptr;
 287        uint8_t *new;
 288        uint8_t *old;
 289
 290        if (up) {
 291                new = data->old;
 292                old = data->new;
 293        } else {
 294                new = data->new;
 295                old = data->old;
 296        }
 297
 298        if ((old[i] > 3) &&
 299            (memscan(new + 2, old[i], USB_KBD_BOOT_REPORT_SIZE - 2) ==
 300                        new + USB_KBD_BOOT_REPORT_SIZE)) {
 301                res |= usb_kbd_translate(data, old[i], data->new[0], up);
 302        }
 303
 304        return res;
 305}
 306
 307/* Interrupt service routine */
 308static int usb_kbd_irq_worker(struct usb_device *dev)
 309{
 310        struct usb_kbd_pdata *data = dev->privptr;
 311        int i, res = 0;
 312
 313        /* No combo key pressed */
 314        if (data->new[0] == 0x00)
 315                data->flags &= ~USB_KBD_CTRL;
 316        /* Left or Right Ctrl pressed */
 317        else if ((data->new[0] == LEFT_CNTR) || (data->new[0] == RIGHT_CNTR))
 318                data->flags |= USB_KBD_CTRL;
 319
 320        for (i = 2; i < USB_KBD_BOOT_REPORT_SIZE; i++) {
 321                res |= usb_kbd_service_key(dev, i, 0);
 322                res |= usb_kbd_service_key(dev, i, 1);
 323        }
 324
 325        /* Key is still pressed */
 326        if ((data->new[2] > 3) && (data->old[2] == data->new[2]))
 327                res |= usb_kbd_translate(data, data->new[2], data->new[0], 2);
 328
 329        if (res == 1)
 330                usb_kbd_setled(dev);
 331
 332        memcpy(data->old, data->new, USB_KBD_BOOT_REPORT_SIZE);
 333
 334        return 1;
 335}
 336
 337/* Keyboard interrupt handler */
 338static int usb_kbd_irq(struct usb_device *dev)
 339{
 340        if ((dev->irq_status != 0) ||
 341            (dev->irq_act_len != USB_KBD_BOOT_REPORT_SIZE)) {
 342                debug("USB KBD: Error %lX, len %d\n",
 343                      dev->irq_status, dev->irq_act_len);
 344                return 1;
 345        }
 346
 347        return usb_kbd_irq_worker(dev);
 348}
 349
 350/* Interrupt polling */
 351static inline void usb_kbd_poll_for_event(struct usb_device *dev)
 352{
 353#if defined(CONFIG_SYS_USB_EVENT_POLL)
 354        struct usb_kbd_pdata *data = dev->privptr;
 355
 356        /* Submit an interrupt transfer request */
 357        if (usb_int_msg(dev, data->intpipe, &data->new[0],
 358                        data->intpktsize, data->intinterval, true) >= 0)
 359                usb_kbd_irq_worker(dev);
 360#elif defined(CONFIG_SYS_USB_EVENT_POLL_VIA_CONTROL_EP) || \
 361      defined(CONFIG_SYS_USB_EVENT_POLL_VIA_INT_QUEUE)
 362#if defined(CONFIG_SYS_USB_EVENT_POLL_VIA_CONTROL_EP)
 363        struct usb_interface *iface;
 364        struct usb_kbd_pdata *data = dev->privptr;
 365        iface = &dev->config.if_desc[0];
 366        usb_get_report(dev, iface->desc.bInterfaceNumber,
 367                       1, 0, data->new, USB_KBD_BOOT_REPORT_SIZE);
 368        if (memcmp(data->old, data->new, USB_KBD_BOOT_REPORT_SIZE)) {
 369                usb_kbd_irq_worker(dev);
 370#else
 371        struct usb_kbd_pdata *data = dev->privptr;
 372        if (poll_int_queue(dev, data->intq)) {
 373                usb_kbd_irq_worker(dev);
 374                /* We've consumed all queued int packets, create new */
 375                destroy_int_queue(dev, data->intq);
 376                data->intq = create_int_queue(dev, data->intpipe, 1,
 377                                      USB_KBD_BOOT_REPORT_SIZE, data->new,
 378                                      data->intinterval);
 379#endif
 380                data->last_report = get_timer(0);
 381        /* Repeat last usb hid report every REPEAT_RATE ms for keyrepeat */
 382        } else if (data->last_report != -1 &&
 383                   get_timer(data->last_report) > REPEAT_RATE) {
 384                usb_kbd_irq_worker(dev);
 385                data->last_report = get_timer(0);
 386        }
 387#endif
 388}
 389
 390/* test if a character is in the queue */
 391static int usb_kbd_testc(struct stdio_dev *sdev)
 392{
 393        struct stdio_dev *dev;
 394        struct usb_device *usb_kbd_dev;
 395        struct usb_kbd_pdata *data;
 396
 397#ifdef CONFIG_CMD_NET
 398        /*
 399         * If net_busy_flag is 1, NET transfer is running,
 400         * then we check key-pressed every second (first check may be
 401         * less than 1 second) to improve TFTP booting performance.
 402         */
 403        if (net_busy_flag && (get_timer(kbd_testc_tms) < CONFIG_SYS_HZ))
 404                return 0;
 405        kbd_testc_tms = get_timer(0);
 406#endif
 407        dev = stdio_get_by_name(sdev->name);
 408        usb_kbd_dev = (struct usb_device *)dev->priv;
 409        data = usb_kbd_dev->privptr;
 410
 411        usb_kbd_poll_for_event(usb_kbd_dev);
 412
 413        return !(data->usb_in_pointer == data->usb_out_pointer);
 414}
 415
 416/* gets the character from the queue */
 417static int usb_kbd_getc(struct stdio_dev *sdev)
 418{
 419        struct stdio_dev *dev;
 420        struct usb_device *usb_kbd_dev;
 421        struct usb_kbd_pdata *data;
 422
 423        dev = stdio_get_by_name(sdev->name);
 424        usb_kbd_dev = (struct usb_device *)dev->priv;
 425        data = usb_kbd_dev->privptr;
 426
 427        while (data->usb_in_pointer == data->usb_out_pointer) {
 428                WATCHDOG_RESET();
 429                usb_kbd_poll_for_event(usb_kbd_dev);
 430        }
 431
 432        if (data->usb_out_pointer == USB_KBD_BUFFER_LEN - 1)
 433                data->usb_out_pointer = 0;
 434        else
 435                data->usb_out_pointer++;
 436
 437        return data->usb_kbd_buffer[data->usb_out_pointer];
 438}
 439
 440/* probes the USB device dev for keyboard type. */
 441static int usb_kbd_probe_dev(struct usb_device *dev, unsigned int ifnum)
 442{
 443        struct usb_interface *iface;
 444        struct usb_endpoint_descriptor *ep;
 445        struct usb_kbd_pdata *data;
 446        int epNum;
 447
 448        if (dev->descriptor.bNumConfigurations != 1)
 449                return 0;
 450
 451        iface = &dev->config.if_desc[ifnum];
 452
 453        if (iface->desc.bInterfaceClass != USB_CLASS_HID)
 454                return 0;
 455
 456        if (iface->desc.bInterfaceSubClass != USB_SUB_HID_BOOT)
 457                return 0;
 458
 459        if (iface->desc.bInterfaceProtocol != USB_PROT_HID_KEYBOARD)
 460                return 0;
 461
 462        for (epNum = 0; epNum < iface->desc.bNumEndpoints; epNum++) {
 463                ep = &iface->ep_desc[epNum];
 464
 465                /* Check if endpoint is interrupt IN endpoint */
 466                if ((ep->bmAttributes & 3) != 3)
 467                        continue;
 468
 469                if (ep->bEndpointAddress & 0x80)
 470                        break;
 471        }
 472
 473        if (epNum == iface->desc.bNumEndpoints)
 474                return 0;
 475
 476        debug("USB KBD: found interrupt EP: 0x%x\n", ep->bEndpointAddress);
 477
 478        data = malloc(sizeof(struct usb_kbd_pdata));
 479        if (!data) {
 480                printf("USB KBD: Error allocating private data\n");
 481                return 0;
 482        }
 483
 484        /* Clear private data */
 485        memset(data, 0, sizeof(struct usb_kbd_pdata));
 486
 487        /* allocate input buffer aligned and sized to USB DMA alignment */
 488        data->new = memalign(USB_DMA_MINALIGN,
 489                roundup(USB_KBD_BOOT_REPORT_SIZE, USB_DMA_MINALIGN));
 490
 491        /* Insert private data into USB device structure */
 492        dev->privptr = data;
 493
 494        /* Set IRQ handler */
 495        dev->irq_handle = usb_kbd_irq;
 496
 497        data->intpipe = usb_rcvintpipe(dev, ep->bEndpointAddress);
 498        data->intpktsize = min(usb_maxpacket(dev, data->intpipe),
 499                               USB_KBD_BOOT_REPORT_SIZE);
 500        data->intinterval = ep->bInterval;
 501        data->last_report = -1;
 502
 503        /* We found a USB Keyboard, install it. */
 504        debug("USB KBD: set boot protocol\n");
 505        usb_set_protocol(dev, iface->desc.bInterfaceNumber, 0);
 506
 507#if !defined(CONFIG_SYS_USB_EVENT_POLL_VIA_CONTROL_EP) && \
 508    !defined(CONFIG_SYS_USB_EVENT_POLL_VIA_INT_QUEUE)
 509        debug("USB KBD: set idle interval...\n");
 510        usb_set_idle(dev, iface->desc.bInterfaceNumber, REPEAT_RATE / 4, 0);
 511#else
 512        debug("USB KBD: set idle interval=0...\n");
 513        usb_set_idle(dev, iface->desc.bInterfaceNumber, 0, 0);
 514#endif
 515
 516        debug("USB KBD: enable interrupt pipe...\n");
 517#ifdef CONFIG_SYS_USB_EVENT_POLL_VIA_INT_QUEUE
 518        data->intq = create_int_queue(dev, data->intpipe, 1,
 519                                      USB_KBD_BOOT_REPORT_SIZE, data->new,
 520                                      data->intinterval);
 521        if (!data->intq) {
 522#elif defined(CONFIG_SYS_USB_EVENT_POLL_VIA_CONTROL_EP)
 523        if (usb_get_report(dev, iface->desc.bInterfaceNumber,
 524                           1, 0, data->new, USB_KBD_BOOT_REPORT_SIZE) < 0) {
 525#else
 526        if (usb_int_msg(dev, data->intpipe, data->new, data->intpktsize,
 527                        data->intinterval, false) < 0) {
 528#endif
 529                printf("Failed to get keyboard state from device %04x:%04x\n",
 530                       dev->descriptor.idVendor, dev->descriptor.idProduct);
 531                /* Abort, we don't want to use that non-functional keyboard. */
 532                return 0;
 533        }
 534
 535        /* Success. */
 536        return 1;
 537}
 538
 539static int probe_usb_keyboard(struct usb_device *dev)
 540{
 541        char *stdinname;
 542        struct stdio_dev usb_kbd_dev;
 543        int error;
 544
 545        /* Try probing the keyboard */
 546        if (usb_kbd_probe_dev(dev, 0) != 1)
 547                return -ENOENT;
 548
 549        /* Register the keyboard */
 550        debug("USB KBD: register.\n");
 551        memset(&usb_kbd_dev, 0, sizeof(struct stdio_dev));
 552        strcpy(usb_kbd_dev.name, DEVNAME);
 553        usb_kbd_dev.flags =  DEV_FLAGS_INPUT;
 554        usb_kbd_dev.getc = usb_kbd_getc;
 555        usb_kbd_dev.tstc = usb_kbd_testc;
 556        usb_kbd_dev.priv = (void *)dev;
 557        error = stdio_register(&usb_kbd_dev);
 558        if (error)
 559                return error;
 560
 561        stdinname = env_get("stdin");
 562#if CONFIG_IS_ENABLED(CONSOLE_MUX)
 563        error = iomux_doenv(stdin, stdinname);
 564        if (error)
 565                return error;
 566#else
 567        /* Check if this is the standard input device. */
 568        if (strcmp(stdinname, DEVNAME))
 569                return 1;
 570
 571        /* Reassign the console */
 572        if (overwrite_console())
 573                return 1;
 574
 575        error = console_assign(stdin, DEVNAME);
 576        if (error)
 577                return error;
 578#endif
 579
 580        return 0;
 581}
 582
 583#if !CONFIG_IS_ENABLED(DM_USB)
 584/* Search for keyboard and register it if found. */
 585int drv_usb_kbd_init(void)
 586{
 587        int error, i;
 588
 589        debug("%s: Probing for keyboard\n", __func__);
 590        /* Scan all USB Devices */
 591        for (i = 0; i < USB_MAX_DEVICE; i++) {
 592                struct usb_device *dev;
 593
 594                /* Get USB device. */
 595                dev = usb_get_dev_index(i);
 596                if (!dev)
 597                        break;
 598
 599                if (dev->devnum == -1)
 600                        continue;
 601
 602                error = probe_usb_keyboard(dev);
 603                if (!error)
 604                        return 1;
 605                if (error && error != -ENOENT)
 606                        return error;
 607        }
 608
 609        /* No USB Keyboard found */
 610        return -1;
 611}
 612
 613/* Deregister the keyboard. */
 614int usb_kbd_deregister(int force)
 615{
 616#if CONFIG_IS_ENABLED(SYS_STDIO_DEREGISTER)
 617        struct stdio_dev *dev;
 618        struct usb_device *usb_kbd_dev;
 619        struct usb_kbd_pdata *data;
 620
 621        dev = stdio_get_by_name(DEVNAME);
 622        if (dev) {
 623                usb_kbd_dev = (struct usb_device *)dev->priv;
 624                data = usb_kbd_dev->privptr;
 625#if CONFIG_IS_ENABLED(CONSOLE_MUX)
 626                if (iomux_replace_device(stdin, DEVNAME, force ? "nulldev" : ""))
 627                        return 1;
 628#endif
 629                if (stdio_deregister_dev(dev, force) != 0)
 630                        return 1;
 631#ifdef CONFIG_SYS_USB_EVENT_POLL_VIA_INT_QUEUE
 632                destroy_int_queue(usb_kbd_dev, data->intq);
 633#endif
 634                free(data->new);
 635                free(data);
 636        }
 637
 638        return 0;
 639#else
 640        return 1;
 641#endif
 642}
 643
 644#endif
 645
 646#if CONFIG_IS_ENABLED(DM_USB)
 647
 648static int usb_kbd_probe(struct udevice *dev)
 649{
 650        struct usb_device *udev = dev_get_parent_priv(dev);
 651
 652        return probe_usb_keyboard(udev);
 653}
 654
 655static int usb_kbd_remove(struct udevice *dev)
 656{
 657        struct usb_device *udev = dev_get_parent_priv(dev);
 658        struct usb_kbd_pdata *data;
 659        struct stdio_dev *sdev;
 660        int ret;
 661
 662        sdev = stdio_get_by_name(DEVNAME);
 663        if (!sdev) {
 664                ret = -ENXIO;
 665                goto err;
 666        }
 667        data = udev->privptr;
 668#if CONFIG_IS_ENABLED(CONSOLE_MUX)
 669        if (iomux_replace_device(stdin, DEVNAME, "nulldev")) {
 670                ret = -ENOLINK;
 671                goto err;
 672        }
 673#endif
 674        if (stdio_deregister_dev(sdev, true)) {
 675                ret = -EPERM;
 676                goto err;
 677        }
 678#ifdef CONFIG_SYS_USB_EVENT_POLL_VIA_INT_QUEUE
 679        destroy_int_queue(udev, data->intq);
 680#endif
 681        free(data->new);
 682        free(data);
 683
 684        return 0;
 685err:
 686        printf("%s: warning, ret=%d", __func__, ret);
 687        return ret;
 688}
 689
 690static const struct udevice_id usb_kbd_ids[] = {
 691        { .compatible = "usb-keyboard" },
 692        { }
 693};
 694
 695U_BOOT_DRIVER(usb_kbd) = {
 696        .name   = "usb_kbd",
 697        .id     = UCLASS_KEYBOARD,
 698        .of_match = usb_kbd_ids,
 699        .probe = usb_kbd_probe,
 700        .remove = usb_kbd_remove,
 701};
 702
 703static const struct usb_device_id kbd_id_table[] = {
 704        {
 705                .match_flags = USB_DEVICE_ID_MATCH_INT_CLASS |
 706                        USB_DEVICE_ID_MATCH_INT_SUBCLASS |
 707                        USB_DEVICE_ID_MATCH_INT_PROTOCOL,
 708                .bInterfaceClass = USB_CLASS_HID,
 709                .bInterfaceSubClass = USB_SUB_HID_BOOT,
 710                .bInterfaceProtocol = USB_PROT_HID_KEYBOARD,
 711        },
 712        { }             /* Terminating entry */
 713};
 714
 715U_BOOT_USB_DEVICE(usb_kbd, kbd_id_table);
 716
 717#endif
 718