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/*
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             LUFA Library
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     Copyright (C) Dean Camera, 2011.
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  dean [at] fourwalledcubicle [dot] com
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           www.lufa-lib.org
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*/
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/*
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  Copyright 2011  Dean Camera (dean [at] fourwalledcubicle [dot] com)
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  Permission to use, copy, modify, distribute, and sell this
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  software and its documentation for any purpose is hereby granted
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  without fee, provided that the above copyright notice appear in
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  all copies and that both that the copyright notice and this
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  permission notice and warranty disclaimer appear in supporting
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  documentation, and that the name of the author not be used in
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  advertising or publicity pertaining to distribution of the
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  software without specific, written prior permission.
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  The author disclaim all warranties with regard to this
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  software, including all implied warranties of merchantability
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  and fitness.  In no event shall the author be liable for any
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  special, indirect or consequential damages or any damages
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  whatsoever resulting from loss of use, data or profits, whether
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  in an action of contract, negligence or other tortious action,
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  arising out of or in connection with the use or performance of
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  this software.
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*/
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/** \file
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 *  \brief Board specific Dataflash driver header for the Atmel XPLAIN.
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 *  \copydetails Group_Dataflash_XPLAIN
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 *
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 *  \note This file should not be included directly. It is automatically included as needed by the dataflash driver
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 *        dispatch header located in LUFA/Drivers/Board/Dataflash.h.
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 */
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/** \ingroup Group_Dataflash
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 *  \defgroup Group_Dataflash_XPLAIN XPLAIN
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 *  \brief Board specific Dataflash driver header for the Atmel XPLAIN.
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 *
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 *  Board specific Dataflash driver header for the Atmel XPLAIN.
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 *
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 *  @{
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 */
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#ifndef __DATAFLASH_XPLAIN_H__
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#define __DATAFLASH_XPLAIN_H__
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        /* Includes: */
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                #include "../../../../Common/Common.h"
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                #include "../../../Misc/AT45DB642D.h"
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        /* Preprocessor Checks: */
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                #if !defined(__INCLUDE_FROM_DATAFLASH_H)
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                        #error Do not include this file directly. Include LUFA/Drivers/Board/Dataflash.h instead.
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                #endif
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        /* Private Interface - For use in library only: */
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        #if !defined(__DOXYGEN__)
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                /* Macros: */
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                        #define DATAFLASH_CHIPCS_MASK                (1 << 5)
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                        #define DATAFLASH_CHIPCS_DDR                 DDRB
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                        #define DATAFLASH_CHIPCS_PORT                PORTB
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        #endif
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        /* Public Interface - May be used in end-application: */
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                /* Macros: */
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                        /** Constant indicating the total number of dataflash ICs mounted on the selected board. */
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                        #define DATAFLASH_TOTALCHIPS                 1
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                        /** Mask for no dataflash chip selected. */
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                        #define DATAFLASH_NO_CHIP                    DATAFLASH_CHIPCS_MASK
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                        /** Mask for the first dataflash chip selected. */
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                        #define DATAFLASH_CHIP1                      0
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                        #if ((BOARD != BOARD_XPLAIN_REV1) || defined(__DOXYGEN__))
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                                /** Internal main memory page size for the board's dataflash ICs. */
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                                #define DATAFLASH_PAGE_SIZE              1024
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                                /** Total number of pages inside each of the board's dataflash ICs. */
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                                #define DATAFLASH_PAGES                  8192
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                        #else
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                                #define DATAFLASH_PAGE_SIZE              256
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                                #define DATAFLASH_PAGES                  2048
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                        #endif
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                /* Inline Functions: */
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                        /** Initializes the dataflash driver so that commands and data may be sent to an attached dataflash IC.
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                         *  The microcontroller's SPI driver MUST be initialized before any of the dataflash commands are used.
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                         */
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                        static inline void Dataflash_Init(void)
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                        {
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                                DATAFLASH_CHIPCS_DDR  |= DATAFLASH_CHIPCS_MASK;
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                                DATAFLASH_CHIPCS_PORT |= DATAFLASH_CHIPCS_MASK;
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                        }
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                        /** Determines the currently selected dataflash chip.
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                         *
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                         *  \return Mask of the currently selected Dataflash chip, either \ref DATAFLASH_NO_CHIP if no chip is selected
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                         *  or a DATAFLASH_CHIPn mask (where n is the chip number).
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                         */
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                        static inline uint8_t Dataflash_GetSelectedChip(void) ATTR_ALWAYS_INLINE ATTR_WARN_UNUSED_RESULT;
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                        static inline uint8_t Dataflash_GetSelectedChip(void)
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                        {
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                                return (DATAFLASH_CHIPCS_PORT & DATAFLASH_CHIPCS_MASK);
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                        }
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                        /** Selects the given dataflash chip.
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                         *
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                         *  \param[in]  ChipMask  Mask of the Dataflash IC to select, in the form of DATAFLASH_CHIPn mask (where n is
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                         *              the chip number).
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                         */
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                        static inline void Dataflash_SelectChip(const uint8_t ChipMask) ATTR_ALWAYS_INLINE;
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                        static inline void Dataflash_SelectChip(const uint8_t ChipMask)
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                        {
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                                DATAFLASH_CHIPCS_PORT = ((DATAFLASH_CHIPCS_PORT & ~DATAFLASH_CHIPCS_MASK) | ChipMask);
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                        }
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                        /** Deselects the current dataflash chip, so that no dataflash is selected. */
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                        static inline void Dataflash_DeselectChip(void) ATTR_ALWAYS_INLINE;
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                        static inline void Dataflash_DeselectChip(void)
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                        {
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                                Dataflash_SelectChip(DATAFLASH_NO_CHIP);
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                        }
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                        /** Selects a dataflash IC from the given page number, which should range from 0 to
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                         *  ((DATAFLASH_PAGES * DATAFLASH_TOTALCHIPS) - 1). For boards containing only one
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                         *  dataflash IC, this will select DATAFLASH_CHIP1. If the given page number is outside
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                         *  the total number of pages contained in the boards dataflash ICs, all dataflash ICs
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                         *  are deselected.
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                         *
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                         *  \param[in] PageAddress  Address of the page to manipulate, ranging from
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                         *                          0 to ((DATAFLASH_PAGES * DATAFLASH_TOTALCHIPS) - 1).
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                         */
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                        static inline void Dataflash_SelectChipFromPage(const uint16_t PageAddress)
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                        {
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                                Dataflash_DeselectChip();
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                                if (PageAddress >= DATAFLASH_PAGES)
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                                  return;
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                                Dataflash_SelectChip(DATAFLASH_CHIP1);
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                        }
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                        /** Toggles the select line of the currently selected dataflash IC, so that it is ready to receive
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                         *  a new command.
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                         */
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                        static inline void Dataflash_ToggleSelectedChipCS(void)
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                        {
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                                uint8_t SelectedChipMask = Dataflash_GetSelectedChip();
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                                Dataflash_DeselectChip();
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                                Dataflash_SelectChip(SelectedChipMask);
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                        }
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                        /** Spin-loops while the currently selected dataflash is busy executing a command, such as a main
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                         *  memory page program or main memory to buffer transfer.
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                         */
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                        static inline void Dataflash_WaitWhileBusy(void)
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                        {
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                                Dataflash_ToggleSelectedChipCS();
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                                Dataflash_SendByte(DF_CMD_GETSTATUS);
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                                while (!(Dataflash_ReceiveByte() & DF_STATUS_READY));
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                                Dataflash_ToggleSelectedChipCS();
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                        }
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                        /** Sends a set of page and buffer address bytes to the currently selected dataflash IC, for use with
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                         *  dataflash commands which require a complete 24-bit address.
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                         *
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                         *  \param[in] PageAddress  Page address within the selected dataflash IC
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                         *  \param[in] BufferByte   Address within the dataflash's buffer
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                         */
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                        static inline void Dataflash_SendAddressBytes(uint16_t PageAddress,
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                                                                      const uint16_t BufferByte)
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                        {
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                                Dataflash_SendByte(PageAddress >> 5);
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                                Dataflash_SendByte((PageAddress << 3) | (BufferByte >> 8));
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                                Dataflash_SendByte(BufferByte);
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                        }
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#endif
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/** @} */
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