*
*/
#include <common.h>
+#include <malloc.h>
#include <stdio_dev.h>
#include <asm/byteorder.h>
#include <usb.h>
-#undef USB_KBD_DEBUG
+#ifdef USB_KBD_DEBUG
+#define USB_KBD_PRINTF(fmt, args...) printf(fmt, ##args)
+#else
+#define USB_KBD_PRINTF(fmt, args...)
+#endif
+
/*
* If overwrite_console returns 1, the stdin, stderr and stdout
* are switched to the serial port, else the settings in the
}
#endif
-#ifdef USB_KBD_DEBUG
-#define USB_KBD_PRINTF(fmt, args...) printf(fmt, ##args)
-#else
-#define USB_KBD_PRINTF(fmt, args...)
-#endif
-
-
-#define REPEAT_RATE (40/4) /* 40msec -> 25cps */
-#define REPEAT_DELAY 10 /* 10 x REPEAT_RATE = 400msec */
+/* Keyboard sampling rate */
+#define REPEAT_RATE (40 / 4) /* 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 0
-#define LEFT_SHIFT 1
-#define LEFT_ALT 2
-#define LEFT_GUI 3
-#define RIGHT_CNTR 4
-#define RIGHT_SHIFT 5
-#define RIGHT_ALT 6
-#define RIGHT_GUI 7
-
-#define USB_KBD_BUFFER_LEN 0x20 /* size of the keyboardbuffer */
-
-static char usb_kbd_buffer[USB_KBD_BUFFER_LEN];
-static int usb_in_pointer;
-static int usb_out_pointer;
-
-unsigned char new[8];
-unsigned char old[8];
-int repeat_delay;
+#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"
-static unsigned char num_lock;
-static unsigned char caps_lock;
-static unsigned char scroll_lock;
-static unsigned char ctrl;
-
-static unsigned char leds __attribute__((aligned(0x4)));
-static unsigned char usb_kbd_numkey[] = {
+/* Keyboard maps */
+static const unsigned char usb_kbd_numkey[] = {
'1', '2', '3', '4', '5', '6', '7', '8', '9', '0',
'\r', 0x1b, '\b', '\t', ' ', '-', '=', '[', ']',
'\\', '#', ';', '\'', '`', ',', '.', '/'
};
-static unsigned char usb_kbd_numkey_shifted[] = {
+static const unsigned char usb_kbd_numkey_shifted[] = {
'!', '@', '#', '$', '%', '^', '&', '*', '(', ')',
'\r', 0x1b, '\b', '\t', ' ', '_', '+', '{', '}',
'|', '~', ':', '"', '~', '<', '>', '?'
};
-static int usb_kbd_irq_worker(struct usb_device *dev);
+/*
+ * 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)
-/******************************************************************
- * Interrupt polling
- ******************************************************************/
-static inline void usb_kbd_poll_for_event(struct usb_device *dev)
-{
-#if defined(CONFIG_SYS_USB_EVENT_POLL)
- usb_event_poll();
- usb_kbd_irq_worker(dev);
-#elif defined(CONFIG_SYS_USB_EVENT_POLL_VIA_CONTROL_EP)
- struct usb_interface *iface;
- iface = &dev->config.if_desc[0];
- usb_get_report(dev, iface->desc.bInterfaceNumber,
- 1, 1, new, sizeof(new));
- if (memcmp(old, new, sizeof(new)))
- usb_kbd_irq_worker(dev);
-#endif
-}
+#define USB_KBD_LEDMASK \
+ (USB_KBD_NUMLOCK | USB_KBD_CAPSLOCK | USB_KBD_SCROLLLOCK)
-/******************************************************************
- * Queue handling
- ******************************************************************/
-/* puts character in the queue and sets up the in and out pointer */
-static void usb_kbd_put_queue(char data)
-{
- if ((usb_in_pointer+1) == USB_KBD_BUFFER_LEN) {
- if (usb_out_pointer == 0)
- return; /* buffer full */
- else
- usb_in_pointer = 0;
- } else {
- if ((usb_in_pointer+1) == usb_out_pointer)
- return; /* buffer full */
- usb_in_pointer++;
- }
- usb_kbd_buffer[usb_in_pointer] = data;
- return;
-}
+struct usb_kbd_pdata {
+ uint32_t repeat_delay;
-/* test if a character is in the queue */
-static int usb_kbd_testc(void)
-{
- struct stdio_dev *dev;
- struct usb_device *usb_kbd_dev;
+ uint32_t usb_in_pointer;
+ uint32_t usb_out_pointer;
+ uint8_t usb_kbd_buffer[USB_KBD_BUFFER_LEN];
- dev = stdio_get_by_name("usbkbd");
- usb_kbd_dev = (struct usb_device *)dev->priv;
+ uint8_t new[8];
+ uint8_t old[8];
- usb_kbd_poll_for_event(usb_kbd_dev);
+ uint8_t flags;
+};
- if (usb_in_pointer == usb_out_pointer)
- return 0; /* no data */
- else
- return 1;
-}
-/* gets the character from the queue */
-static int usb_kbd_getc(void)
+/* Generic keyboard event polling. */
+void usb_kbd_generic_poll(void)
{
- char c;
-
struct stdio_dev *dev;
struct usb_device *usb_kbd_dev;
+ struct usb_kbd_pdata *data;
+ struct usb_interface *iface;
+ struct usb_endpoint_descriptor *ep;
+ int pipe;
+ int maxp;
- dev = stdio_get_by_name("usbkbd");
+ /* Get the pointer to USB Keyboard device pointer */
+ dev = stdio_get_by_name(DEVNAME);
usb_kbd_dev = (struct usb_device *)dev->priv;
+ data = usb_kbd_dev->privptr;
+ iface = &usb_kbd_dev->config.if_desc[0];
+ ep = &iface->ep_desc[0];
+ pipe = usb_rcvintpipe(usb_kbd_dev, ep->bEndpointAddress);
- while (usb_in_pointer == usb_out_pointer)
- usb_kbd_poll_for_event(usb_kbd_dev);
-
- if ((usb_out_pointer+1) == USB_KBD_BUFFER_LEN)
- usb_out_pointer = 0;
- else
- usb_out_pointer++;
- c = usb_kbd_buffer[usb_out_pointer];
- return (int)c;
-
+ /* Submit a interrupt transfer request */
+ maxp = usb_maxpacket(usb_kbd_dev, pipe);
+ usb_submit_int_msg(usb_kbd_dev, pipe, data->new,
+ maxp > 8 ? 8 : maxp, ep->bInterval);
}
-/* forward decleration */
-static int usb_kbd_probe(struct usb_device *dev, unsigned int ifnum);
-
-/* search for keyboard and register it if found */
-int drv_usb_kbd_init(void)
+/* Puts character in the queue and sets up the in and out pointer. */
+static void usb_kbd_put_queue(struct usb_kbd_pdata *data, char c)
{
- int error, i;
- struct stdio_dev usb_kbd_dev, *old_dev;
- struct usb_device *dev;
- char *stdinname = getenv("stdin");
+ if (data->usb_in_pointer == USB_KBD_BUFFER_LEN - 1) {
+ /* Check for buffer full. */
+ if (data->usb_out_pointer == 0)
+ return;
- usb_in_pointer = 0;
- usb_out_pointer = 0;
- /* scan all USB Devices */
- for (i = 0 ; i < USB_MAX_DEVICE ; i++) {
- dev = usb_get_dev_index(i); /* get device */
- if (dev == NULL)
- return -1;
- if (dev->devnum != -1) {
- /* Ok, we found a keyboard */
- if (usb_kbd_probe(dev, 0) == 1) {
- /* check, if it is already registered */
- USB_KBD_PRINTF("USB KBD found set up "
- "device.\n");
- old_dev = stdio_get_by_name(DEVNAME);
- if (old_dev) {
- /* already registered, just return ok */
- USB_KBD_PRINTF("USB KBD is already "
- "registered.\n");
- return 1;
- }
- /* register the keyboard */
- USB_KBD_PRINTF("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 |
- DEV_FLAGS_SYSTEM;
- usb_kbd_dev.putc = NULL;
- usb_kbd_dev.puts = NULL;
- 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 == 0) {
- /*
- * check if this is the standard
- * input device
- */
- if (strcmp(stdinname, DEVNAME) == 0) {
- /* reassign the console */
- if (overwrite_console())
- return 1;
- error = console_assign(stdin,
- DEVNAME);
- if (error == 0)
- return 1;
- else
- return error;
- }
- return 1;
- }
- return error;
- }
- }
- }
- /* no USB Keyboard found */
- return -1;
-}
+ 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++;
+ }
-/* deregistering the keyboard */
-int usb_kbd_deregister(void)
-{
-#ifdef CONFIG_SYS_STDIO_DEREGISTER
- return stdio_deregister(DEVNAME);
-#else
- return 1;
-#endif
+ data->usb_kbd_buffer[data->usb_in_pointer] = c;
}
-/**************************************************************************
- * Low Level drivers
+/*
+ * 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.
*/
-
-/* 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;
- iface = &dev->config.if_desc[0];
- leds = 0;
- if (scroll_lock != 0)
- leds |= 1;
- leds <<= 1;
- if (caps_lock != 0)
- leds |= 1;
- leds <<= 1;
- if (num_lock != 0)
- leds |= 1;
+ struct usb_interface *iface = &dev->config.if_desc[0];
+ struct usb_kbd_pdata *data = dev->privptr;
+ uint32_t 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, (void *)&leds, 1, 0);
-
}
-
-#define CAPITAL_MASK 0x20
+#define CAPITAL_MASK 0x20
/* Translate the scancode in ASCII */
-static int usb_kbd_translate(unsigned char scancode, unsigned char modifier,
- int pressed)
+static int usb_kbd_translate(struct usb_kbd_pdata *data, unsigned char scancode,
+ unsigned char modifier, int pressed)
{
- unsigned char keycode;
+ uint8_t keycode = 0;
+ /* Key released */
if (pressed == 0) {
- /* key released */
- repeat_delay = 0;
+ data->repeat_delay = 0;
return 0;
}
+
if (pressed == 2) {
- repeat_delay++;
- if (repeat_delay < REPEAT_DELAY)
+ data->repeat_delay++;
+ if (data->repeat_delay < REPEAT_DELAY)
return 0;
- repeat_delay = REPEAT_DELAY;
+
+ data->repeat_delay = REPEAT_DELAY;
}
- keycode = 0;
- if ((scancode > 3) && (scancode <= 0x1d)) { /* alpha numeric values */
- keycode = scancode - 4 + 0x61;
- if (caps_lock)
- /* switch to capital Letters */
+
+ /* Alphanumeric values */
+ if ((scancode > 3) && (scancode <= 0x1d)) {
+ keycode = scancode - 4 + 'a';
+
+ if (data->flags & USB_KBD_CAPSLOCK)
keycode &= ~CAPITAL_MASK;
- if (((modifier&(1 << LEFT_SHIFT)) != 0) ||
- ((modifier&(1 << RIGHT_SHIFT)) != 0)) {
+
+ if (modifier & (LEFT_SHIFT | RIGHT_SHIFT)) {
+ /* Handle CAPSLock + Shift pressed simultaneously */
if (keycode & CAPITAL_MASK)
- /* switch to capital Letters */
keycode &= ~CAPITAL_MASK;
else
- /* switch to non capital Letters */
keycode |= CAPITAL_MASK;
}
}
- if ((scancode > 0x1d) && (scancode < 0x3A)) {
- if (((modifier&(1 << LEFT_SHIFT)) != 0) ||
- ((modifier&(1 << RIGHT_SHIFT)) != 0)) /* shifted */
- keycode = usb_kbd_numkey_shifted[scancode-0x1e];
- else /* non shifted */
- keycode = usb_kbd_numkey[scancode-0x1e];
+
+ if ((scancode > 0x1d) && (scancode < 0x3a)) {
+ /* Shift pressed */
+ if (modifier & (LEFT_SHIFT | RIGHT_SHIFT))
+ keycode = usb_kbd_numkey_shifted[scancode - 0x1e];
+ else
+ keycode = usb_kbd_numkey[scancode - 0x1e];
}
- if (ctrl)
+ if (data->flags & USB_KBD_CTRL)
keycode = scancode - 0x3;
if (pressed == 1) {
if (scancode == NUM_LOCK) {
- num_lock = ~num_lock;
+ data->flags ^= USB_KBD_NUMLOCK;
return 1;
}
+
if (scancode == CAPS_LOCK) {
- caps_lock = ~caps_lock;
+ data->flags ^= USB_KBD_CAPSLOCK;
return 1;
}
if (scancode == SCROLL_LOCK) {
- scroll_lock = ~scroll_lock;
+ data->flags ^= USB_KBD_SCROLLLOCK;
return 1;
}
}
- if (keycode != 0) {
+
+ /* Report keycode if any */
+ if (keycode) {
USB_KBD_PRINTF("%c", keycode);
- usb_kbd_put_queue(keycode);
+ usb_kbd_put_queue(data, keycode);
}
+
return 0;
}
+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], 6) == new + 8))
+ 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)
{
- int i, res;
+ struct usb_kbd_pdata *data = dev->privptr;
+ int i, res = 0;
- res = 0;
-
- switch (new[0]) {
- case 0x0: /* No combo key pressed */
- ctrl = 0;
- break;
- case 0x01: /* Left Ctrl pressed */
- case 0x10: /* Right Ctrl pressed */
- ctrl = 1;
- break;
- }
+ /* 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 < 8; i++) {
- if (old[i] > 3 && memscan(&new[2], old[i], 6) == &new[8])
- res |= usb_kbd_translate(old[i], new[0], 0);
-
- if (new[i] > 3 && memscan(&old[2], new[i], 6) == &old[8])
- res |= usb_kbd_translate(new[i], new[0], 1);
+ res |= usb_kbd_service_key(dev, i, 0);
+ res |= usb_kbd_service_key(dev, i, 1);
}
- if ((new[2] > 3) && (old[2] == new[2])) /* still pressed */
- res |= usb_kbd_translate(new[2], new[0], 2);
+ /* 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(&old[0], &new[0], 8);
+ memcpy(data->old, data->new, 8);
- return 1; /* install IRQ Handler again */
+ return 1;
}
+/* Keyboard interrupt handler */
static int usb_kbd_irq(struct usb_device *dev)
{
if ((dev->irq_status != 0) || (dev->irq_act_len != 8)) {
- USB_KBD_PRINTF("usb_keyboard Error %lX, len %d\n",
+ USB_KBD_PRINTF("USB KBD: Error %lX, len %d\n",
dev->irq_status, dev->irq_act_len);
return 1;
}
return usb_kbd_irq_worker(dev);
}
-/* probes the USB device dev for keyboard type */
+/* Interrupt polling */
+static inline void usb_kbd_poll_for_event(struct usb_device *dev)
+{
+#if defined(CONFIG_SYS_USB_EVENT_POLL)
+ usb_event_poll();
+ usb_kbd_irq_worker(dev);
+#elif 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, 1, data->new, sizeof(data->new));
+ if (memcmp(data->old, data->new, sizeof(data->new)))
+ usb_kbd_irq_worker(dev);
+#endif
+}
+
+/* test if a character is in the queue */
+static int usb_kbd_testc(void)
+{
+ struct stdio_dev *dev;
+ struct usb_device *usb_kbd_dev;
+ struct usb_kbd_pdata *data;
+
+ dev = stdio_get_by_name(DEVNAME);
+ 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(void)
+{
+ struct stdio_dev *dev;
+ struct usb_device *usb_kbd_dev;
+ struct usb_kbd_pdata *data;
+
+ dev = stdio_get_by_name(DEVNAME);
+ usb_kbd_dev = (struct usb_device *)dev->priv;
+ data = usb_kbd_dev->privptr;
+
+ while (data->usb_in_pointer == data->usb_out_pointer)
+ 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(struct usb_device *dev, unsigned int ifnum)
{
struct usb_interface *iface;
struct usb_endpoint_descriptor *ep;
+ struct usb_kbd_pdata *data;
int pipe, maxp;
if (dev->descriptor.bNumConfigurations != 1)
return 0;
+
iface = &dev->config.if_desc[ifnum];
if (iface->desc.bInterfaceClass != 3)
return 0;
+
if (iface->desc.bInterfaceSubClass != 1)
return 0;
+
if (iface->desc.bInterfaceProtocol != 1)
return 0;
+
if (iface->desc.bNumEndpoints != 1)
return 0;
ep = &iface->ep_desc[0];
+ /* Check if endpoint 1 is interrupt endpoint */
if (!(ep->bEndpointAddress & 0x80))
return 0;
+
if ((ep->bmAttributes & 3) != 3)
return 0;
- USB_KBD_PRINTF("USB KBD found set protocol...\n");
- /* ok, we found a USB Keyboard, install it */
- /* usb_kbd_get_hid_desc(dev); */
- usb_set_protocol(dev, iface->desc.bInterfaceNumber, 0);
- USB_KBD_PRINTF("USB KBD found set idle...\n");
- usb_set_idle(dev, iface->desc.bInterfaceNumber, REPEAT_RATE, 0);
- memset(&new[0], 0, 8);
- memset(&old[0], 0, 8);
- repeat_delay = 0;
+
+ USB_KBD_PRINTF("USB KBD: found set protocol...\n");
+
+ 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));
+
+ /* Insert private data into USB device structure */
+ dev->privptr = data;
+
+ /* Set IRQ handler */
+ dev->irq_handle = usb_kbd_irq;
+
pipe = usb_rcvintpipe(dev, ep->bEndpointAddress);
maxp = usb_maxpacket(dev, pipe);
- dev->irq_handle = usb_kbd_irq;
- USB_KBD_PRINTF("USB KBD enable interrupt pipe...\n");
- usb_submit_int_msg(dev, pipe, &new[0], maxp > 8 ? 8 : maxp,
+
+ /* We found a USB Keyboard, install it. */
+ usb_set_protocol(dev, iface->desc.bInterfaceNumber, 0);
+
+ USB_KBD_PRINTF("USB KBD: found set idle...\n");
+ usb_set_idle(dev, iface->desc.bInterfaceNumber, REPEAT_RATE, 0);
+
+ USB_KBD_PRINTF("USB KBD: enable interrupt pipe...\n");
+ usb_submit_int_msg(dev, pipe, data->new, maxp > 8 ? 8 : maxp,
ep->bInterval);
+
+ /* Success. */
return 1;
}
+/* Search for keyboard and register it if found. */
+int drv_usb_kbd_init(void)
+{
+ struct stdio_dev usb_kbd_dev, *old_dev;
+ struct usb_device *dev;
+ char *stdinname = getenv("stdin");
+ int error, i;
+
+ /* Scan all USB Devices */
+ for (i = 0; i < USB_MAX_DEVICE; i++) {
+ /* Get USB device. */
+ dev = usb_get_dev_index(i);
+ if (!dev)
+ return -1;
+
+ if (dev->devnum == -1)
+ continue;
+
+ /* Try probing the keyboard */
+ if (usb_kbd_probe(dev, 0) != 1)
+ continue;
+
+ /* We found a keyboard, check if it is already registered. */
+ USB_KBD_PRINTF("USB KBD: found set up device.\n");
+ old_dev = stdio_get_by_name(DEVNAME);
+ if (old_dev) {
+ /* Already registered, just return ok. */
+ USB_KBD_PRINTF("USB KBD: is already registered.\n");
+ return 1;
+ }
+
+ /* Register the keyboard */
+ USB_KBD_PRINTF("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 | DEV_FLAGS_SYSTEM;
+ usb_kbd_dev.putc = NULL;
+ usb_kbd_dev.puts = NULL;
+ 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;
+
+ /* 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;
+
+ return 1;
+ }
+
+ /* No USB Keyboard found */
+ return -1;
+}
+
+/* Deregister the keyboard. */
+int usb_kbd_deregister(void)
+{
+#ifdef CONFIG_SYS_STDIO_DEREGISTER
+ return stdio_deregister(DEVNAME);
+#else
+ return 1;
+#endif
+}
#if 0
struct usb_hid_descriptor {
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