/* Copyright (C) 2011 Circuits At Home, LTD. All rights reserved.

This software may be distributed and modified under the terms of the GNU
General Public License version 2 (GPL2) as published by the Free Software
Foundation and appearing in the file GPL2.TXT included in the packaging of
this file. Please note that GPL2 Section 2[b] requires that all works based
on this software must also be made publicly available under the terms of
the GPL2 ("Copyleft").

Contact information
-------------------

Circuits At Home, LTD
Web      :  http://www.circuitsathome.com
e-mail   :  support@circuitsathome.com
*/
#if !defined(__HID_H__)
#define __HID_H__

#include "Usb.h"
#include "hidusagestr.h"

#define MAX_REPORT_PARSERS			2
#define HID_MAX_HID_CLASS_DESCRIPTORS		5

#define DATA_SIZE_MASK           0x03
#define TYPE_MASK                0x0C
#define TAG_MASK                 0xF0

#define DATA_SIZE_0              0x00
#define DATA_SIZE_1              0x01
#define DATA_SIZE_2              0x02
#define DATA_SIZE_4              0x03

#define TYPE_MAIN                0x00
#define TYPE_GLOBAL              0x04
#define TYPE_LOCAL               0x08

#define TAG_MAIN_INPUT           0x80
#define TAG_MAIN_OUTPUT          0x90
#define TAG_MAIN_COLLECTION      0xA0
#define TAG_MAIN_FEATURE         0xB0
#define TAG_MAIN_ENDCOLLECTION   0xC0

#define TAG_GLOBAL_USAGEPAGE     0x00
#define TAG_GLOBAL_LOGICALMIN    0x10
#define TAG_GLOBAL_LOGICALMAX    0x20
#define TAG_GLOBAL_PHYSMIN       0x30
#define TAG_GLOBAL_PHYSMAX       0x40
#define TAG_GLOBAL_UNITEXP       0x50
#define TAG_GLOBAL_UNIT          0x60
#define TAG_GLOBAL_REPORTSIZE    0x70
#define TAG_GLOBAL_REPORTID      0x80
#define TAG_GLOBAL_REPORTCOUNT   0x90
#define TAG_GLOBAL_PUSH          0xA0
#define TAG_GLOBAL_POP           0xB0

#define TAG_LOCAL_USAGE          0x00
#define TAG_LOCAL_USAGEMIN       0x10
#define TAG_LOCAL_USAGEMAX       0x20

/* HID requests */
#define bmREQ_HIDOUT        USB_SETUP_HOST_TO_DEVICE|USB_SETUP_TYPE_CLASS|USB_SETUP_RECIPIENT_INTERFACE
#define bmREQ_HIDIN         USB_SETUP_DEVICE_TO_HOST|USB_SETUP_TYPE_CLASS|USB_SETUP_RECIPIENT_INTERFACE
#define bmREQ_HIDREPORT     USB_SETUP_DEVICE_TO_HOST|USB_SETUP_TYPE_STANDARD|USB_SETUP_RECIPIENT_INTERFACE

/* HID constants. Not part of chapter 9 */
/* Class-Specific Requests */
#define HID_REQUEST_GET_REPORT      0x01
#define HID_REQUEST_GET_IDLE        0x02
#define HID_REQUEST_GET_PROTOCOL    0x03
#define HID_REQUEST_SET_REPORT      0x09
#define HID_REQUEST_SET_IDLE        0x0A
#define HID_REQUEST_SET_PROTOCOL    0x0B

/* Class Descriptor Types */
#define HID_DESCRIPTOR_HID			0x21
#define HID_DESCRIPTOR_REPORT		0x22
#define HID_DESRIPTOR_PHY			0x23

/* Protocol Selection */
#define HID_BOOT_PROTOCOL			0x00
#define HID_RPT_PROTOCOL			0x01

/* HID Interface Class Code */
#define HID_INTF                    0x03

/* HID Interface Class SubClass Codes */
#define HID_BOOT_INTF_SUBCLASS      0x01

/* HID Interface Class Protocol Codes */
#define HID_PROTOCOL_NONE           0x00
#define HID_PROTOCOL_KEYBOARD       0x01
#define HID_PROTOCOL_MOUSE          0x02

#define HID_ITEM_TYPE_MAIN							0
#define HID_ITEM_TYPE_GLOBAL						1
#define HID_ITEM_TYPE_LOCAL							2
#define HID_ITEM_TYPE_RESERVED						3

#define HID_LONG_ITEM_PREFIX						0xfe		// Long item prefix value

#define bmHID_MAIN_ITEM_TAG							0xfc		// Main item tag mask

#define bmHID_MAIN_ITEM_INPUT						0x80		// Main item Input tag value
#define bmHID_MAIN_ITEM_OUTPUT						0x90		// Main item Output tag value
#define bmHID_MAIN_ITEM_FEATURE						0xb0		// Main item Feature tag value
#define bmHID_MAIN_ITEM_COLLECTION					0xa0		// Main item Collection tag value
#define bmHID_MAIN_ITEM_END_COLLECTION				0xce		// Main item End Collection tag value

#define HID_MAIN_ITEM_COLLECTION_PHYSICAL			0
#define HID_MAIN_ITEM_COLLECTION_APPLICATION		1
#define HID_MAIN_ITEM_COLLECTION_LOGICAL			2
#define HID_MAIN_ITEM_COLLECTION_REPORT				3
#define HID_MAIN_ITEM_COLLECTION_NAMED_ARRAY		4
#define HID_MAIN_ITEM_COLLECTION_USAGE_SWITCH		5
#define HID_MAIN_ITEM_COLLECTION_USAGE_MODIFIER		6

struct HidItemPrefix {
	uint8_t		bSize : 2;
	uint8_t		bType : 2;
	uint8_t		bTag  : 4;
};

struct MainItemIOFeature {
	uint8_t		bmIsConstantOrData			: 1;
	uint8_t		bmIsArrayOrVariable			: 1;
	uint8_t		bmIsRelativeOrAbsolute		: 1;
	uint8_t		bmIsWrapOrNoWrap			: 1;
	uint8_t		bmIsNonLonearOrLinear		: 1;
	uint8_t		bmIsNoPreferedOrPrefered	: 1;
	uint8_t		bmIsNullOrNoNull			: 1;
	uint8_t		bmIsVolatileOrNonVolatile	: 1;
};

class HID;

class HIDReportParser {
public:
	virtual void Parse(HID *hid, uint32_t is_rpt_id, uint32_t len, uint8_t *buf)= 0;
};

class HID : public USBDeviceConfig, public UsbConfigXtracter {
protected:
	USBHost		*pUsb;					// USB class instance pointer
	uint32_t	bAddress;				// address

protected:
	static const uint32_t	epInterruptInIndex	= 1;	// InterruptIN  endpoint index
	static const uint32_t	epInterruptOutIndex	= 2;	// InterruptOUT endpoint index

	static const uint32_t	maxHidInterfaces	= 3;
	static const uint32_t	maxEpPerInterface	= 2;
	static const uint32_t	totalEndpoints		= (maxHidInterfaces * maxEpPerInterface + 1);

	void PrintEndpointDescriptor(const USB_ENDPOINT_DESCRIPTOR* ep_ptr);
	void PrintHidDescriptor(const USB_HID_DESCRIPTOR *pDesc);

	virtual HIDReportParser* GetReportParser(uint32_t id);

public:

	HID(USBHost *pusb) : pUsb(pusb) {
	};

	const USBHost* GetUsb() {
		return pUsb; 
	};
	virtual uint32_t SetReportParser(uint32_t id, HIDReportParser *prs);

	uint32_t SetProtocol(uint32_t iface, uint32_t protocol);
	uint32_t GetProtocol(uint32_t iface, uint8_t* dataptr);
	uint32_t GetIdle(uint32_t iface, uint32_t reportID, uint8_t* dataptr);
	uint32_t SetIdle(uint32_t iface, uint32_t reportID, uint32_t duration);

	uint32_t GetReportDescr(uint32_t ep, USBReadParser *parser = NULL);

	uint32_t GetHidDescr(uint32_t ep, uint32_t nbytes, uint8_t* dataptr);
	uint32_t GetReport(uint32_t ep, uint32_t iface, uint32_t report_type, uint32_t report_id, uint32_t nbytes, uint8_t* dataptr);
	uint32_t SetReport(uint32_t ep, uint32_t iface, uint32_t report_type, uint32_t report_id, uint32_t nbytes, uint8_t* dataptr);
};

#endif // __HID_H__
