/* * (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 #include #include #include #include #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