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|
/*
* (C) Copyright 2001
* Denis Peter, MPL AG Switzerland
*
* Part of this source has been derived from the Linux USB
* project.
*
* See file CREDITS for list of people who contributed to this
* project.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*
*/
#include <common.h>
#include <malloc.h>
#include <stdio_dev.h>
#include <asm/byteorder.h>
#include <usb.h>
#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
* 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 / 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 (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', ' ', '_', '+', '{', '}',
'|', '~', ':', '"', '~', '<', '>', '?'
};
/*
* 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 {
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[8];
uint8_t old[8];
uint8_t flags;
};
/* Generic keyboard event polling. */
void usb_kbd_generic_poll(void)
{
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;
/* 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);
/* 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);
}
/* 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)
{
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;
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
/* 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 < 0x3a)) {
/* Shift pressed */
if (modifier & (LEFT_SHIFT | RIGHT_SHIFT))
keycode = usb_kbd_numkey_shifted[scancode - 0x1e];
else
keycode = usb_kbd_numkey[scancode - 0x1e];
}
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) {
USB_KBD_PRINTF("%c", 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)
{
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 < 8; 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, 8);
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 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)
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");
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);
/* 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 {
unsigned char bLength;
unsigned char bDescriptorType; /* 0x21 for HID */
unsigned short bcdHID; /* release number */
unsigned char bCountryCode;
unsigned char bNumDescriptors;
unsigned char bReportDescriptorType;
unsigned short wDescriptorLength;
} __packed;
/*
* We parse each description item into this structure. Short items data
* values are expanded to 32-bit signed int, long items contain a pointer
* into the data area.
*/
struct hid_item {
unsigned char format;
unsigned char size;
unsigned char type;
unsigned char tag;
union {
unsigned char u8;
char s8;
unsigned short u16;
short s16;
unsigned long u32;
long s32;
unsigned char *longdata;
} data;
};
/*
* HID report item format
*/
#define HID_ITEM_FORMAT_SHORT 0
#define HID_ITEM_FORMAT_LONG 1
/*
* Special tag indicating long items
*/
#define HID_ITEM_TAG_LONG 15
static struct usb_hid_descriptor usb_kbd_hid_desc;
void usb_kbd_display_hid(struct usb_hid_descriptor *hid)
{
printf("USB_HID_DESC:\n");
printf(" bLenght 0x%x\n", hid->bLength);
printf(" bcdHID 0x%x\n", hid->bcdHID);
printf(" bCountryCode %d\n", hid->bCountryCode);
printf(" bNumDescriptors 0x%x\n", hid->bNumDescriptors);
printf(" bReportDescriptorType 0x%x\n", hid->bReportDescriptorType);
printf(" wDescriptorLength 0x%x\n", hid->wDescriptorLength);
}
/*
* Fetch a report description item from the data stream. We support long
* items, though they are not used yet.
*/
static int fetch_item(unsigned char *start, unsigned char *end,
struct hid_item *item)
{
if ((end - start) > 0) {
unsigned char b = *start++;
item->type = (b >> 2) & 3;
item->tag = (b >> 4) & 15;
if (item->tag == HID_ITEM_TAG_LONG) {
item->format = HID_ITEM_FORMAT_LONG;
if ((end - start) >= 2) {
item->size = *start++;
item->tag = *start++;
if ((end - start) >= item->size) {
item->data.longdata = start;
start += item->size;
return item->size;
}
}
} else {
item->format = HID_ITEM_FORMAT_SHORT;
item->size = b & 3;
switch (item->size) {
case 0:
return item->size;
case 1:
if ((end - start) >= 1) {
item->data.u8 = *start++;
return item->size;
}
break;
case 2:
if ((end - start) >= 2) {
item->data.u16 = le16_to_cpu(
(unsigned short *)start);
start += 2;
return item->size;
}
case 3:
item->size++;
if ((end - start) >= 4) {
item->data.u32 = le32_to_cpu(
(unsigned long *)start);
start += 4;
return item->size;
}
}
}
}
return -1;
}
/*
* HID report descriptor item type (prefix bit 2, 3)
*/
#define HID_ITEM_TYPE_MAIN 0
#define HID_ITEM_TYPE_GLOBAL 1
#define HID_ITEM_TYPE_LOCAL 2
#define HID_ITEM_TYPE_RESERVED 3
/*
* HID report descriptor main item tags
*/
#define HID_MAIN_ITEM_TAG_INPUT 8
#define HID_MAIN_ITEM_TAG_OUTPUT 9
#define HID_MAIN_ITEM_TAG_FEATURE 11
#define HID_MAIN_ITEM_TAG_BEGIN_COLLECTION 10
#define HID_MAIN_ITEM_TAG_END_COLLECTION 12
/*
* HID report descriptor main item contents
*/
#define HID_MAIN_ITEM_CONSTANT 0x001
#define HID_MAIN_ITEM_VARIABLE 0x002
#define HID_MAIN_ITEM_RELATIVE 0x004
#define HID_MAIN_ITEM_WRAP 0x008
#define HID_MAIN_ITEM_NONLINEAR 0x010
#define HID_MAIN_ITEM_NO_PREFERRED 0x020
#define HID_MAIN_ITEM_NULL_STATE 0x040
#define HID_MAIN_ITEM_VOLATILE 0x080
#define HID_MAIN_ITEM_BUFFERED_BYTE 0x100
/*
* HID report descriptor collection item types
*/
#define HID_COLLECTION_PHYSICAL 0
#define HID_COLLECTION_APPLICATION 1
#define HID_COLLECTION_LOGICAL 2
/*
* HID report descriptor global item tags
*/
#define HID_GLOBAL_ITEM_TAG_USAGE_PAGE 0
#define HID_GLOBAL_ITEM_TAG_LOGICAL_MINIMUM 1
#define HID_GLOBAL_ITEM_TAG_LOGICAL_MAXIMUM 2
#define HID_GLOBAL_ITEM_TAG_PHYSICAL_MINIMUM 3
#define HID_GLOBAL_ITEM_TAG_PHYSICAL_MAXIMUM 4
#define HID_GLOBAL_ITEM_TAG_UNIT_EXPONENT 5
#define HID_GLOBAL_ITEM_TAG_UNIT 6
#define HID_GLOBAL_ITEM_TAG_REPORT_SIZE 7
#define HID_GLOBAL_ITEM_TAG_REPORT_ID 8
#define HID_GLOBAL_ITEM_TAG_REPORT_COUNT 9
#define HID_GLOBAL_ITEM_TAG_PUSH 10
#define HID_GLOBAL_ITEM_TAG_POP 11
/*
* HID report descriptor local item tags
*/
#define HID_LOCAL_ITEM_TAG_USAGE 0
#define HID_LOCAL_ITEM_TAG_USAGE_MINIMUM 1
#define HID_LOCAL_ITEM_TAG_USAGE_MAXIMUM 2
#define HID_LOCAL_ITEM_TAG_DESIGNATOR_INDEX 3
#define HID_LOCAL_ITEM_TAG_DESIGNATOR_MINIMUM 4
#define HID_LOCAL_ITEM_TAG_DESIGNATOR_MAXIMUM 5
#define HID_LOCAL_ITEM_TAG_STRING_INDEX 7
#define HID_LOCAL_ITEM_TAG_STRING_MINIMUM 8
#define HID_LOCAL_ITEM_TAG_STRING_MAXIMUM 9
#define HID_LOCAL_ITEM_TAG_DELIMITER 10
static void usb_kbd_show_item(struct hid_item *item)
{
switch (item->type) {
case HID_ITEM_TYPE_MAIN:
switch (item->tag) {
case HID_MAIN_ITEM_TAG_INPUT:
printf("Main Input");
break;
case HID_MAIN_ITEM_TAG_OUTPUT:
printf("Main Output");
break;
case HID_MAIN_ITEM_TAG_FEATURE:
printf("Main Feature");
break;
case HID_MAIN_ITEM_TAG_BEGIN_COLLECTION:
printf("Main Begin Collection");
break;
case HID_MAIN_ITEM_TAG_END_COLLECTION:
printf("Main End Collection");
break;
default:
printf("Main reserved %d", item->tag);
break;
}
break;
case HID_ITEM_TYPE_GLOBAL:
switch (item->tag) {
case HID_GLOBAL_ITEM_TAG_USAGE_PAGE:
printf("- Global Usage Page");
break;
case HID_GLOBAL_ITEM_TAG_LOGICAL_MINIMUM:
printf("- Global Logical Minimum");
break;
case HID_GLOBAL_ITEM_TAG_LOGICAL_MAXIMUM:
printf("- Global Logical Maximum");
break;
case HID_GLOBAL_ITEM_TAG_PHYSICAL_MINIMUM:
printf("- Global physical Minimum");
break;
case HID_GLOBAL_ITEM_TAG_PHYSICAL_MAXIMUM:
printf("- Global physical Maximum");
break;
case HID_GLOBAL_ITEM_TAG_UNIT_EXPONENT:
printf("- Global Unit Exponent");
break;
case HID_GLOBAL_ITEM_TAG_UNIT:
printf("- Global Unit");
break;
case HID_GLOBAL_ITEM_TAG_REPORT_SIZE:
printf("- Global Report Size");
break;
case HID_GLOBAL_ITEM_TAG_REPORT_ID:
printf("- Global Report ID");
break;
case HID_GLOBAL_ITEM_TAG_REPORT_COUNT:
printf("- Global Report Count");
break;
case HID_GLOBAL_ITEM_TAG_PUSH:
printf("- Global Push");
break;
case HID_GLOBAL_ITEM_TAG_POP:
printf("- Global Pop");
break;
default:
printf("- Global reserved %d", item->tag);
break;
}
break;
case HID_ITEM_TYPE_LOCAL:
switch (item->tag) {
case HID_LOCAL_ITEM_TAG_USAGE:
printf("-- Local Usage");
break;
case HID_LOCAL_ITEM_TAG_USAGE_MINIMUM:
printf("-- Local Usage Minimum");
break;
case HID_LOCAL_ITEM_TAG_USAGE_MAXIMUM:
printf("-- Local Usage Maximum");
break;
case HID_LOCAL_ITEM_TAG_DESIGNATOR_INDEX:
printf("-- Local Designator Index");
break;
case HID_LOCAL_ITEM_TAG_DESIGNATOR_MINIMUM:
printf("-- Local Designator Minimum");
break;
case HID_LOCAL_ITEM_TAG_DESIGNATOR_MAXIMUM:
printf("-- Local Designator Maximum");
break;
case HID_LOCAL_ITEM_TAG_STRING_INDEX:
printf("-- Local String Index");
break;
case HID_LOCAL_ITEM_TAG_STRING_MINIMUM:
printf("-- Local String Minimum");
break;
case HID_LOCAL_ITEM_TAG_STRING_MAXIMUM:
printf("-- Local String Maximum");
break;
case HID_LOCAL_ITEM_TAG_DELIMITER:
printf("-- Local Delimiter");
break;
default:
printf("-- Local reserved %d", item->tag);
break;
}
break;
default:
printf("--- reserved %d", item->type);
break;
}
switch (item->size) {
case 1:
printf(" %d", item->data.u8);
break;
case 2:
printf(" %d", item->data.u16);
break;
case 4:
printf(" %ld", item->data.u32);
break;
}
printf("\n");
}
static int usb_kbd_get_hid_desc(struct usb_device *dev)
{
unsigned char buffer[256];
struct usb_descriptor_header *head;
struct usb_config_descriptor *config;
int index, len, i;
unsigned char *start, *end;
struct hid_item item;
if (usb_get_configuration_no(dev, &buffer[0], 0) == -1)
return -1;
head = (struct usb_descriptor_header *)&buffer[0];
if (head->bDescriptorType != USB_DT_CONFIG) {
printf(" ERROR: NOT USB_CONFIG_DESC %x\n",
head->bDescriptorType);
return -1;
}
index = head->bLength;
config = (struct usb_config_descriptor *)&buffer[0];
len = le16_to_cpu(config->wTotalLength);
/*
* Ok the first entry must be a configuration entry,
* now process the others
*/
head = (struct usb_descriptor_header *)&buffer[index];
while (index+1 < len) {
if (head->bDescriptorType == USB_DT_HID) {
printf("HID desc found\n");
memcpy(&usb_kbd_hid_desc, &buffer[index],
buffer[index]);
le16_to_cpus(&usb_kbd_hid_desc.bcdHID);
le16_to_cpus(&usb_kbd_hid_desc.wDescriptorLength);
usb_kbd_display_hid(&usb_kbd_hid_desc);
len = 0;
break;
}
index += head->bLength;
head = (struct usb_descriptor_header *)&buffer[index];
}
if (len > 0)
return -1;
len = usb_kbd_hid_desc.wDescriptorLength;
index = usb_get_class_descriptor(dev, 0, USB_DT_REPORT, 0, &buffer[0],
len);
if (index < 0) {
printf("reading report descriptor failed\n");
return -1;
}
printf(" report descriptor (size %u, read %d)\n", len, index);
start = &buffer[0];
end = &buffer[len];
i = 0;
do {
index = fetch_item(start, end, &item);
i += index;
i++;
if (index >= 0)
usb_kbd_show_item(&item);
start += index;
start++;
} while (index >= 0);
}
#endif
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