#ifndef _USB_DEV_DFU_H
#define _USB_DEV_DFU_H

#include <stdint.h>
#include <board.h>
#include <usb/common/core/USBGenericDescriptor.h>
#include <usb/common/core/USBGenericDescriptor.h>
#include <usb/device/core/USBDDriver.h>

#if 0
/* This is valid for CCID */
#define CONFIG_DFU_NUM_APP_IF	1
#define CONFIG_DFU_NUM_APP_STR	4
#else
/* This is valid for CDC-Serial */
#define CONFIG_DFU_NUM_APP_IF	2
#define CONFIG_DFU_NUM_APP_STR	2
#endif

struct USBStringDescriptor {
	USBGenericDescriptor hdr;
	unsigned short wData[];
} __attribute__((packed));


#ifdef BOARD_USB_DFU

#include <usb/common/dfu/usb_dfu.h>

/* for board-specific config */
#include <board.h>

struct dfu_desc {
	USBConfigurationDescriptor ucfg;
	USBInterfaceDescriptor uif[BOARD_DFU_NUM_IF];
	struct usb_dfu_func_descriptor func_dfu;
} __attribute__ ((packed));

/* USB DFU functional descriptor */
#define DFU_FUNC_DESC  {						\
	.bLength		= USB_DT_DFU_SIZE,			\
	.bDescriptorType	= USB_DT_DFU,				\
	.bmAttributes		= USB_DFU_CAN_UPLOAD | USB_DFU_CAN_DOWNLOAD, \
	.wDetachTimeOut		= 0xff00,				\
	.wTransferSize		= BOARD_DFU_PAGE_SIZE,			\
	.bcdDFUVersion		= 0x0100,				\
}

#define DFU_IF_DESCRIPTORS_STRUCT		\
	USBInterfaceDescriptor	dfu_interface[DFU_NUM_IF];

#define DFU_IF_DESCRIPTORS			{ 				\
	{									\
		.bLength 		= sizeof(USBInterfaceDescriptor),	\
		.bDescriptorType	= USBGenericDescriptor_INTERFACE,	\
		.bInterfaceNumber	= CONFIG_DFU_NUM_APP_IF,		\
		.bAlternateSetting	= 0,					\
		.bNumEndpoints		= 0,					\
		.bInterfaceClass	= 0xFE,					\
		.bInterfaceSubClass	= 0x01,					\
		.bInterfaceProtocol	= 0x01,					\
		.iInterface		= CONFIG_DFU_NUM_APP_STR,		\
	},									\
	{									\
		.bLength 		= sizeof(USBInterfaceDescriptor),	\
		.bDescriptorType	= USBGenericDescriptor_INTERFACE,	\
		.bInterfaceNumber	= CONFIG_DFU_NUM_APP_IF+1,		\
		.bAlternateSetting	= 0,					\
		.bNumEndpoints		= 0,					\
		.bInterfaceClass	= 0xFE,					\
		.bInterfaceSubClass	= 0x01,					\
		.bInterfaceProtocol	= 0x01,					\
		.iInterface		= CONFIG_DFU_NUM_APP_STR+1,		\
	},									\
	{									\
		.bLength 		= sizeof(USBInterfaceDescriptor),	\
		.bDescriptorType	= USBGenericDescriptor_INTERFACE,	\
		.bInterfaceNumber	= CONFIG_DFU_NUM_APP_IF+2,		\
		.bAlternateSetting	= 0,					\
		.bNumEndpoints		= 0,					\
		.bInterfaceClass	= 0xFE,					\
		.bInterfaceSubClass	= 0x01,					\
		.bInterfaceProtocol	= 0x01,					\
		.iInterface		= CONFIG_DFU_NUM_APP_STR+2,		\
	},									\
}

extern const struct USBStringDescriptor USBDFU_string1;
extern const struct USBStringDescriptor USBDFU_string2;
extern const struct USBStringDescriptor USBDFU_string3;

#define DFU_NUM_STRINGS	3
#define DFU_STRING_DESCRIPTORS	\
	(const unsigned char *) &USBDFU_string1,	\
	(const unsigned char *) &USBDFU_string2,	\
	(const unsigned char *) &USBDFU_string3,

const struct dfu_desc dfu_cfg_descriptor;
const USBDDriverDescriptors dfu_descriptors;

#else /* BOARD_USB_DFU */

/* no DFU bootloader is being used */
#define DFU_NUM_IF	0
#define DFU_IF_DESCRIPTORS_STRUCT
#define DFU_IF_DESCRIPTORS

#define DFU_NUM_STRINGS	0
#define DFU_STRING_DESCRIPTORS

#endif /* BOARD_USB_DFU */

/* The API between the core DFU handler and the board/soc specific code */

struct dfu {
	uint8_t status;
	uint32_t state;
	int past_manifest;
};

extern struct dfu dfu;

/* call-backs by the board/SOC */
extern int USBDFU_handle_dnload(uint16_t val, uint16_t len, int first);
extern int USBDFU_handle_upload(uint16_t val, uint16_t len, int first);

void USBDFU_Runtime_RequestHandler(const USBGenericRequest *request);
void USBDFU_DFU_RequestHandler(const USBGenericRequest *request);

void USBDFU_Initialize(const USBDDriverDescriptors *pDescriptors, unsigned char *pInterfaces);

#define DFU_RET_NOTHING	0
#define DFU_RET_ZLP	1
#define DFU_RET_STALL	2

#endif