1 files changed, 717 insertions, 0 deletions

diff --git a/roms/u-boot/common/usb_kbd.c b/roms/u-boot/common/usb_kbd.c
new file mode 100644
index 000000000..afad260d3
--- /dev/null
+++ b/roms/u-boot/common/usb_kbd.c
@@ -0,0 +1,717 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * (C) Copyright 2001
+ * Denis Peter, MPL AG Switzerland
+ *
+ * Part of this source has been derived from the Linux USB
+ * project.
+ */
+#include <common.h>
+#include <console.h>
+#include <dm.h>
+#include <env.h>
+#include <errno.h>
+#include <log.h>
+#include <malloc.h>
+#include <memalign.h>
+#include <stdio_dev.h>
+#include <watchdog.h>
+#include <asm/byteorder.h>
+
+#include <usb.h>
+
+/*
+ * If overwrite_console returns 1, the stdin, stderr and stdout
+ * are switched to the serial port, else the settings in the
+ * environment are used
+ */
+#ifdef CONFIG_SYS_CONSOLE_OVERWRITE_ROUTINE
+extern int overwrite_console(void);
+#else
+int overwrite_console(void)
+{
+	return 0;
+}
+#endif
+
+/* Keyboard sampling rate */
+#define REPEAT_RATE	40		/* 40msec -> 25cps */
+#define REPEAT_DELAY	10		/* 10 x REPEAT_RATE = 400msec */
+
+#define NUM_LOCK	0x53
+#define CAPS_LOCK	0x39
+#define SCROLL_LOCK	0x47
+
+/* Modifier bits */
+#define LEFT_CNTR	(1 << 0)
+#define LEFT_SHIFT	(1 << 1)
+#define LEFT_ALT	(1 << 2)
+#define LEFT_GUI	(1 << 3)
+#define RIGHT_CNTR	(1 << 4)
+#define RIGHT_SHIFT	(1 << 5)
+#define RIGHT_ALT	(1 << 6)
+#define RIGHT_GUI	(1 << 7)
+
+/* Size of the keyboard buffer */
+#define USB_KBD_BUFFER_LEN	0x20
+
+/* Device name */
+#define DEVNAME			"usbkbd"
+
+/* Keyboard maps */
+static const unsigned char usb_kbd_numkey[] = {
+	'1', '2', '3', '4', '5', '6', '7', '8', '9', '0',
+	'\r', 0x1b, '\b', '\t', ' ', '-', '=', '[', ']',
+	'\\', '#', ';', '\'', '`', ',', '.', '/'
+};
+static const unsigned char usb_kbd_numkey_shifted[] = {
+	'!', '@', '#', '$', '%', '^', '&', '*', '(', ')',
+	'\r', 0x1b, '\b', '\t', ' ', '_', '+', '{', '}',
+	'|', '~', ':', '"', '~', '<', '>', '?'
+};
+
+static const unsigned char usb_kbd_num_keypad[] = {
+	'/', '*', '-', '+', '\r',
+	'1', '2', '3', '4', '5', '6', '7', '8', '9', '0',
+	'.', 0, 0, 0, '='
+};
+
+static const u8 usb_special_keys[] = {
+#ifdef CONFIG_USB_KEYBOARD_FN_KEYS
+	'2', 'H', '5', '3', 'F', '6', 'C', 'D', 'B', 'A'
+#else
+	'C', 'D', 'B', 'A'
+#endif
+};
+
+/*
+ * NOTE: It's important for the NUM, CAPS, SCROLL-lock bits to be in this
+ *       order. See usb_kbd_setled() function!
+ */
+#define USB_KBD_NUMLOCK		(1 << 0)
+#define USB_KBD_CAPSLOCK	(1 << 1)
+#define USB_KBD_SCROLLLOCK	(1 << 2)
+#define USB_KBD_CTRL		(1 << 3)
+
+#define USB_KBD_LEDMASK		\
+	(USB_KBD_NUMLOCK | USB_KBD_CAPSLOCK | USB_KBD_SCROLLLOCK)
+
+struct usb_kbd_pdata {
+	unsigned long	intpipe;
+	int		intpktsize;
+	int		intinterval;
+	unsigned long	last_report;
+	struct int_queue *intq;
+
+	uint32_t	repeat_delay;
+
+	uint32_t	usb_in_pointer;
+	uint32_t	usb_out_pointer;
+	uint8_t		usb_kbd_buffer[USB_KBD_BUFFER_LEN];
+
+	uint8_t		*new;
+	uint8_t		old[USB_KBD_BOOT_REPORT_SIZE];
+
+	uint8_t		flags;
+};
+
+extern int __maybe_unused net_busy_flag;
+
+/* The period of time between two calls of usb_kbd_testc(). */
+static unsigned long __maybe_unused kbd_testc_tms;
+
+/* Puts character in the queue and sets up the in and out pointer. */
+static void usb_kbd_put_queue(struct usb_kbd_pdata *data, u8 c)
+{
+	if (data->usb_in_pointer == USB_KBD_BUFFER_LEN - 1) {
+		/* Check for buffer full. */
+		if (data->usb_out_pointer == 0)
+			return;
+
+		data->usb_in_pointer = 0;
+	} else {
+		/* Check for buffer full. */
+		if (data->usb_in_pointer == data->usb_out_pointer - 1)
+			return;
+
+		data->usb_in_pointer++;
+	}
+
+	data->usb_kbd_buffer[data->usb_in_pointer] = c;
+}
+
+/*
+ * Set the LEDs. Since this is used in the irq routine, the control job is
+ * issued with a timeout of 0. This means, that the job is queued without
+ * waiting for job completion.
+ */
+static void usb_kbd_setled(struct usb_device *dev)
+{
+	struct usb_interface *iface = &dev->config.if_desc[0];
+	struct usb_kbd_pdata *data = dev->privptr;
+	ALLOC_ALIGN_BUFFER(uint32_t, leds, 1, USB_DMA_MINALIGN);
+
+	*leds = data->flags & USB_KBD_LEDMASK;
+	usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
+		USB_REQ_SET_REPORT, USB_TYPE_CLASS | USB_RECIP_INTERFACE,
+		0x200, iface->desc.bInterfaceNumber, leds, 1, 0);
+}
+
+#define CAPITAL_MASK	0x20
+/* Translate the scancode in ASCII */
+static int usb_kbd_translate(struct usb_kbd_pdata *data, unsigned char scancode,
+				unsigned char modifier, int pressed)
+{
+	uint8_t keycode = 0;
+
+	/* Key released */
+	if (pressed == 0) {
+		data->repeat_delay = 0;
+		return 0;
+	}
+
+	if (pressed == 2) {
+		data->repeat_delay++;
+		if (data->repeat_delay < REPEAT_DELAY)
+			return 0;
+
+		data->repeat_delay = REPEAT_DELAY;
+	}
+
+	/* Alphanumeric values */
+	if ((scancode > 3) && (scancode <= 0x1d)) {
+		keycode = scancode - 4 + 'a';
+
+		if (data->flags & USB_KBD_CAPSLOCK)
+			keycode &= ~CAPITAL_MASK;
+
+		if (modifier & (LEFT_SHIFT | RIGHT_SHIFT)) {
+			/* Handle CAPSLock + Shift pressed simultaneously */
+			if (keycode & CAPITAL_MASK)
+				keycode &= ~CAPITAL_MASK;
+			else
+				keycode |= CAPITAL_MASK;
+		}
+	}
+
+	if ((scancode > 0x1d) && (scancode < 0x39)) {
+		/* Shift pressed */
+		if (modifier & (LEFT_SHIFT | RIGHT_SHIFT))
+			keycode = usb_kbd_numkey_shifted[scancode - 0x1e];
+		else
+			keycode = usb_kbd_numkey[scancode - 0x1e];
+	}
+
+	/* Numeric keypad */
+	if ((scancode >= 0x54) && (scancode <= 0x67))
+		keycode = usb_kbd_num_keypad[scancode - 0x54];
+
+	if (data->flags & USB_KBD_CTRL)
+		keycode = scancode - 0x3;
+
+	if (pressed == 1) {
+		if (scancode == NUM_LOCK) {
+			data->flags ^= USB_KBD_NUMLOCK;
+			return 1;
+		}
+
+		if (scancode == CAPS_LOCK) {
+			data->flags ^= USB_KBD_CAPSLOCK;
+			return 1;
+		}
+		if (scancode == SCROLL_LOCK) {
+			data->flags ^= USB_KBD_SCROLLLOCK;
+			return 1;
+		}
+	}
+
+	/* Report keycode if any */
+	if (keycode) {
+		debug("%c", keycode);
+		usb_kbd_put_queue(data, keycode);
+		return 0;
+	}
+
+#ifdef CONFIG_USB_KEYBOARD_FN_KEYS
+	if (scancode < 0x3a || scancode > 0x52 ||
+	    scancode == 0x46 || scancode == 0x47)
+		return 1;
+
+	usb_kbd_put_queue(data, 0x1b);
+	if (scancode < 0x3e) {
+		/* F1 - F4 */
+		usb_kbd_put_queue(data, 0x4f);
+		usb_kbd_put_queue(data, scancode - 0x3a + 'P');
+		return 0;
+	}
+	usb_kbd_put_queue(data, '[');
+	if (scancode < 0x42) {
+		/* F5 - F8 */
+		usb_kbd_put_queue(data, '1');
+		if (scancode == 0x3e)
+			--scancode;
+		keycode = scancode - 0x3f + '7';
+	} else if (scancode < 0x49) {
+		/* F9 - F12 */
+		usb_kbd_put_queue(data, '2');
+		if (scancode > 0x43)
+			++scancode;
+		keycode = scancode - 0x42 + '0';
+	} else {
+		/*
+		 * INSERT, HOME, PAGE UP, DELETE, END, PAGE DOWN,
+		 * RIGHT, LEFT, DOWN, UP
+		 */
+		keycode = usb_special_keys[scancode - 0x49];
+	}
+	usb_kbd_put_queue(data, keycode);
+	if (scancode < 0x4f && scancode != 0x4a && scancode != 0x4d)
+		usb_kbd_put_queue(data, '~');
+	return 0;
+#else
+	/* Left, Right, Up, Down */
+	if (scancode > 0x4e && scancode < 0x53) {
+		usb_kbd_put_queue(data, 0x1b);
+		usb_kbd_put_queue(data, '[');
+		usb_kbd_put_queue(data, usb_special_keys[scancode - 0x4f]);
+		return 0;
+	}
+	return 1;
+#endif /* CONFIG_USB_KEYBOARD_FN_KEYS */
+}
+
+static uint32_t usb_kbd_service_key(struct usb_device *dev, int i, int up)
+{
+	uint32_t res = 0;
+	struct usb_kbd_pdata *data = dev->privptr;
+	uint8_t *new;
+	uint8_t *old;
+
+	if (up) {
+		new = data->old;
+		old = data->new;
+	} else {
+		new = data->new;
+		old = data->old;
+	}
+
+	if ((old[i] > 3) &&
+	    (memscan(new + 2, old[i], USB_KBD_BOOT_REPORT_SIZE - 2) ==
+			new + USB_KBD_BOOT_REPORT_SIZE)) {
+		res |= usb_kbd_translate(data, old[i], data->new[0], up);
+	}
+
+	return res;
+}
+
+/* Interrupt service routine */
+static int usb_kbd_irq_worker(struct usb_device *dev)
+{
+	struct usb_kbd_pdata *data = dev->privptr;
+	int i, res = 0;
+
+	/* No combo key pressed */
+	if (data->new[0] == 0x00)
+		data->flags &= ~USB_KBD_CTRL;
+	/* Left or Right Ctrl pressed */
+	else if ((data->new[0] == LEFT_CNTR) || (data->new[0] == RIGHT_CNTR))
+		data->flags |= USB_KBD_CTRL;
+
+	for (i = 2; i < USB_KBD_BOOT_REPORT_SIZE; i++) {
+		res |= usb_kbd_service_key(dev, i, 0);
+		res |= usb_kbd_service_key(dev, i, 1);
+	}
+
+	/* Key is still pressed */
+	if ((data->new[2] > 3) && (data->old[2] == data->new[2]))
+		res |= usb_kbd_translate(data, data->new[2], data->new[0], 2);
+
+	if (res == 1)
+		usb_kbd_setled(dev);
+
+	memcpy(data->old, data->new, USB_KBD_BOOT_REPORT_SIZE);
+
+	return 1;
+}
+
+/* Keyboard interrupt handler */
+static int usb_kbd_irq(struct usb_device *dev)
+{
+	if ((dev->irq_status != 0) ||
+	    (dev->irq_act_len != USB_KBD_BOOT_REPORT_SIZE)) {
+		debug("USB KBD: Error %lX, len %d\n",
+		      dev->irq_status, dev->irq_act_len);
+		return 1;
+	}
+
+	return usb_kbd_irq_worker(dev);
+}
+
+/* Interrupt polling */
+static inline void usb_kbd_poll_for_event(struct usb_device *dev)
+{
+#if defined(CONFIG_SYS_USB_EVENT_POLL)
+	struct usb_kbd_pdata *data = dev->privptr;
+
+	/* Submit an interrupt transfer request */
+	if (usb_int_msg(dev, data->intpipe, &data->new[0],
+			data->intpktsize, data->intinterval, true) >= 0)
+		usb_kbd_irq_worker(dev);
+#elif defined(CONFIG_SYS_USB_EVENT_POLL_VIA_CONTROL_EP) || \
+      defined(CONFIG_SYS_USB_EVENT_POLL_VIA_INT_QUEUE)
+#if defined(CONFIG_SYS_USB_EVENT_POLL_VIA_CONTROL_EP)
+	struct usb_interface *iface;
+	struct usb_kbd_pdata *data = dev->privptr;
+	iface = &dev->config.if_desc[0];
+	usb_get_report(dev, iface->desc.bInterfaceNumber,
+		       1, 0, data->new, USB_KBD_BOOT_REPORT_SIZE);
+	if (memcmp(data->old, data->new, USB_KBD_BOOT_REPORT_SIZE)) {
+		usb_kbd_irq_worker(dev);
+#else
+	struct usb_kbd_pdata *data = dev->privptr;
+	if (poll_int_queue(dev, data->intq)) {
+		usb_kbd_irq_worker(dev);
+		/* We've consumed all queued int packets, create new */
+		destroy_int_queue(dev, data->intq);
+		data->intq = create_int_queue(dev, data->intpipe, 1,
+				      USB_KBD_BOOT_REPORT_SIZE, data->new,
+				      data->intinterval);
+#endif
+		data->last_report = get_timer(0);
+	/* Repeat last usb hid report every REPEAT_RATE ms for keyrepeat */
+	} else if (data->last_report != -1 &&
+		   get_timer(data->last_report) > REPEAT_RATE) {
+		usb_kbd_irq_worker(dev);
+		data->last_report = get_timer(0);
+	}
+#endif
+}
+
+/* test if a character is in the queue */
+static int usb_kbd_testc(struct stdio_dev *sdev)
+{
+	struct stdio_dev *dev;
+	struct usb_device *usb_kbd_dev;
+	struct usb_kbd_pdata *data;
+
+#ifdef CONFIG_CMD_NET
+	/*
+	 * If net_busy_flag is 1, NET transfer is running,
+	 * then we check key-pressed every second (first check may be
+	 * less than 1 second) to improve TFTP booting performance.
+	 */
+	if (net_busy_flag && (get_timer(kbd_testc_tms) < CONFIG_SYS_HZ))
+		return 0;
+	kbd_testc_tms = get_timer(0);
+#endif
+	dev = stdio_get_by_name(sdev->name);
+	usb_kbd_dev = (struct usb_device *)dev->priv;
+	data = usb_kbd_dev->privptr;
+
+	usb_kbd_poll_for_event(usb_kbd_dev);
+
+	return !(data->usb_in_pointer == data->usb_out_pointer);
+}
+
+/* gets the character from the queue */
+static int usb_kbd_getc(struct stdio_dev *sdev)
+{
+	struct stdio_dev *dev;
+	struct usb_device *usb_kbd_dev;
+	struct usb_kbd_pdata *data;
+
+	dev = stdio_get_by_name(sdev->name);
+	usb_kbd_dev = (struct usb_device *)dev->priv;
+	data = usb_kbd_dev->privptr;
+
+	while (data->usb_in_pointer == data->usb_out_pointer) {
+		WATCHDOG_RESET();
+		usb_kbd_poll_for_event(usb_kbd_dev);
+	}
+
+	if (data->usb_out_pointer == USB_KBD_BUFFER_LEN - 1)
+		data->usb_out_pointer = 0;
+	else
+		data->usb_out_pointer++;
+
+	return data->usb_kbd_buffer[data->usb_out_pointer];
+}
+
+/* probes the USB device dev for keyboard type. */
+static int usb_kbd_probe_dev(struct usb_device *dev, unsigned int ifnum)
+{
+	struct usb_interface *iface;
+	struct usb_endpoint_descriptor *ep;
+	struct usb_kbd_pdata *data;
+	int epNum;
+
+	if (dev->descriptor.bNumConfigurations != 1)
+		return 0;
+
+	iface = &dev->config.if_desc[ifnum];
+
+	if (iface->desc.bInterfaceClass != USB_CLASS_HID)
+		return 0;
+
+	if (iface->desc.bInterfaceSubClass != USB_SUB_HID_BOOT)
+		return 0;
+
+	if (iface->desc.bInterfaceProtocol != USB_PROT_HID_KEYBOARD)
+		return 0;
+
+	for (epNum = 0; epNum < iface->desc.bNumEndpoints; epNum++) {
+		ep = &iface->ep_desc[epNum];
+
+		/* Check if endpoint is interrupt IN endpoint */
+		if ((ep->bmAttributes & 3) != 3)
+			continue;
+
+		if (ep->bEndpointAddress & 0x80)
+			break;
+	}
+
+	if (epNum == iface->desc.bNumEndpoints)
+		return 0;
+
+	debug("USB KBD: found interrupt EP: 0x%x\n", ep->bEndpointAddress);
+
+	data = malloc(sizeof(struct usb_kbd_pdata));
+	if (!data) {
+		printf("USB KBD: Error allocating private data\n");
+		return 0;
+	}
+
+	/* Clear private data */
+	memset(data, 0, sizeof(struct usb_kbd_pdata));
+
+	/* allocate input buffer aligned and sized to USB DMA alignment */
+	data->new = memalign(USB_DMA_MINALIGN,
+		roundup(USB_KBD_BOOT_REPORT_SIZE, USB_DMA_MINALIGN));
+
+	/* Insert private data into USB device structure */
+	dev->privptr = data;
+
+	/* Set IRQ handler */
+	dev->irq_handle = usb_kbd_irq;
+
+	data->intpipe = usb_rcvintpipe(dev, ep->bEndpointAddress);
+	data->intpktsize = min(usb_maxpacket(dev, data->intpipe),
+			       USB_KBD_BOOT_REPORT_SIZE);
+	data->intinterval = ep->bInterval;
+	data->last_report = -1;
+
+	/* We found a USB Keyboard, install it. */
+	debug("USB KBD: set boot protocol\n");
+	usb_set_protocol(dev, iface->desc.bInterfaceNumber, 0);
+
+#if !defined(CONFIG_SYS_USB_EVENT_POLL_VIA_CONTROL_EP) && \
+    !defined(CONFIG_SYS_USB_EVENT_POLL_VIA_INT_QUEUE)
+	debug("USB KBD: set idle interval...\n");
+	usb_set_idle(dev, iface->desc.bInterfaceNumber, REPEAT_RATE / 4, 0);
+#else
+	debug("USB KBD: set idle interval=0...\n");
+	usb_set_idle(dev, iface->desc.bInterfaceNumber, 0, 0);
+#endif
+
+	debug("USB KBD: enable interrupt pipe...\n");
+#ifdef CONFIG_SYS_USB_EVENT_POLL_VIA_INT_QUEUE
+	data->intq = create_int_queue(dev, data->intpipe, 1,
+				      USB_KBD_BOOT_REPORT_SIZE, data->new,
+				      data->intinterval);
+	if (!data->intq) {
+#elif defined(CONFIG_SYS_USB_EVENT_POLL_VIA_CONTROL_EP)
+	if (usb_get_report(dev, iface->desc.bInterfaceNumber,
+			   1, 0, data->new, USB_KBD_BOOT_REPORT_SIZE) < 0) {
+#else
+	if (usb_int_msg(dev, data->intpipe, data->new, data->intpktsize,
+			data->intinterval, false) < 0) {
+#endif
+		printf("Failed to get keyboard state from device %04x:%04x\n",
+		       dev->descriptor.idVendor, dev->descriptor.idProduct);
+		/* Abort, we don't want to use that non-functional keyboard. */
+		return 0;
+	}
+
+	/* Success. */
+	return 1;
+}
+
+static int probe_usb_keyboard(struct usb_device *dev)
+{
+	char *stdinname;
+	struct stdio_dev usb_kbd_dev;
+	int error;
+
+	/* Try probing the keyboard */
+	if (usb_kbd_probe_dev(dev, 0) != 1)
+		return -ENOENT;
+
+	/* Register the keyboard */
+	debug("USB KBD: register.\n");
+	memset(&usb_kbd_dev, 0, sizeof(struct stdio_dev));
+	strcpy(usb_kbd_dev.name, DEVNAME);
+	usb_kbd_dev.flags =  DEV_FLAGS_INPUT;
+	usb_kbd_dev.getc = usb_kbd_getc;
+	usb_kbd_dev.tstc = usb_kbd_testc;
+	usb_kbd_dev.priv = (void *)dev;
+	error = stdio_register(&usb_kbd_dev);
+	if (error)
+		return error;
+
+	stdinname = env_get("stdin");
+#if CONFIG_IS_ENABLED(CONSOLE_MUX)
+	error = iomux_doenv(stdin, stdinname);
+	if (error)
+		return error;
+#else
+	/* Check if this is the standard input device. */
+	if (strcmp(stdinname, DEVNAME))
+		return 1;
+
+	/* Reassign the console */
+	if (overwrite_console())
+		return 1;
+
+	error = console_assign(stdin, DEVNAME);
+	if (error)
+		return error;
+#endif
+
+	return 0;
+}
+
+#if !CONFIG_IS_ENABLED(DM_USB)
+/* Search for keyboard and register it if found. */
+int drv_usb_kbd_init(void)
+{
+	int error, i;
+
+	debug("%s: Probing for keyboard\n", __func__);
+	/* Scan all USB Devices */
+	for (i = 0; i < USB_MAX_DEVICE; i++) {
+		struct usb_device *dev;
+
+		/* Get USB device. */
+		dev = usb_get_dev_index(i);
+		if (!dev)
+			break;
+
+		if (dev->devnum == -1)
+			continue;
+
+		error = probe_usb_keyboard(dev);
+		if (!error)
+			return 1;
+		if (error && error != -ENOENT)
+			return error;
+	}
+
+	/* No USB Keyboard found */
+	return -1;
+}
+
+/* Deregister the keyboard. */
+int usb_kbd_deregister(int force)
+{
+#if CONFIG_IS_ENABLED(SYS_STDIO_DEREGISTER)
+	struct stdio_dev *dev;
+	struct usb_device *usb_kbd_dev;
+	struct usb_kbd_pdata *data;
+
+	dev = stdio_get_by_name(DEVNAME);
+	if (dev) {
+		usb_kbd_dev = (struct usb_device *)dev->priv;
+		data = usb_kbd_dev->privptr;
+#if CONFIG_IS_ENABLED(CONSOLE_MUX)
+		if (iomux_replace_device(stdin, DEVNAME, force ? "nulldev" : ""))
+			return 1;
+#endif
+		if (stdio_deregister_dev(dev, force) != 0)
+			return 1;
+#ifdef CONFIG_SYS_USB_EVENT_POLL_VIA_INT_QUEUE
+		destroy_int_queue(usb_kbd_dev, data->intq);
+#endif
+		free(data->new);
+		free(data);
+	}
+
+	return 0;
+#else
+	return 1;
+#endif
+}
+
+#endif
+
+#if CONFIG_IS_ENABLED(DM_USB)
+
+static int usb_kbd_probe(struct udevice *dev)
+{
+	struct usb_device *udev = dev_get_parent_priv(dev);
+
+	return probe_usb_keyboard(udev);
+}
+
+static int usb_kbd_remove(struct udevice *dev)
+{
+	struct usb_device *udev = dev_get_parent_priv(dev);
+	struct usb_kbd_pdata *data;
+	struct stdio_dev *sdev;
+	int ret;
+
+	sdev = stdio_get_by_name(DEVNAME);
+	if (!sdev) {
+		ret = -ENXIO;
+		goto err;
+	}
+	data = udev->privptr;
+#if CONFIG_IS_ENABLED(CONSOLE_MUX)
+	if (iomux_replace_device(stdin, DEVNAME, "nulldev")) {
+		ret = -ENOLINK;
+		goto err;
+	}
+#endif
+	if (stdio_deregister_dev(sdev, true)) {
+		ret = -EPERM;
+		goto err;
+	}
+#ifdef CONFIG_SYS_USB_EVENT_POLL_VIA_INT_QUEUE
+	destroy_int_queue(udev, data->intq);
+#endif
+	free(data->new);
+	free(data);
+
+	return 0;
+err:
+	printf("%s: warning, ret=%d", __func__, ret);
+	return ret;
+}
+
+static const struct udevice_id usb_kbd_ids[] = {
+	{ .compatible = "usb-keyboard" },
+	{ }
+};
+
+U_BOOT_DRIVER(usb_kbd) = {
+	.name	= "usb_kbd",
+	.id	= UCLASS_KEYBOARD,
+	.of_match = usb_kbd_ids,
+	.probe = usb_kbd_probe,
+	.remove = usb_kbd_remove,
+};
+
+static const struct usb_device_id kbd_id_table[] = {
+	{
+		.match_flags = USB_DEVICE_ID_MATCH_INT_CLASS |
+			USB_DEVICE_ID_MATCH_INT_SUBCLASS |
+			USB_DEVICE_ID_MATCH_INT_PROTOCOL,
+		.bInterfaceClass = USB_CLASS_HID,
+		.bInterfaceSubClass = USB_SUB_HID_BOOT,
+		.bInterfaceProtocol = USB_PROT_HID_KEYBOARD,
+	},
+	{ }		/* Terminating entry */
+};
+
+U_BOOT_USB_DEVICE(usb_kbd, kbd_id_table);
+
+#endif