/*-----------------------------------------------------------------------*/
/* Low level disk I/O module skeleton for FatFs     (C)ChaN, 2014        */
/*-----------------------------------------------------------------------*/
/* If a working storage control module is available, it should be        */
/* attached to the FatFs via a glue function rather than modifying it.   */
/* This is an example of glue functions to attach various exsisting      */
/* storage control modules to the FatFs module with a defined API.       */
/*-----------------------------------------------------------------------*/
#include "stdio.h"
#include "diskio.h"			/* FatFs lower layer API */
#include "nandflash.h"		

//#define ff_printf	printf
#define ff_printf(...)

#define SECTOR_SIZE		512	/* SD卡扇区大小必须为512 */

/*-----------------------------------------------------------------------*/
/* Get Drive Status                                                      */
/*-----------------------------------------------------------------------*/

DSTATUS disk_status (
	BYTE pdrv		/* Physical drive nmuber to identify the drive */
)
{
	DSTATUS stat = STA_NOINIT;

	switch (pdrv)
	{

		case FS_NAND :
			stat = 0;
			break;

		default:
			break;
	}
	return stat;
}



/*-----------------------------------------------------------------------*/
/* Inidialize a Drive                                                    */
/*-----------------------------------------------------------------------*/

DSTATUS disk_initialize (
	BYTE pdrv				/* Physical drive nmuber to identify the drive */
)
{
	DSTATUS stat = STA_NOINIT;

	switch (pdrv)
	{

		case FS_NAND :		/* NAND Flash */
			if (1)  //修改为无需判断
			{
				stat = RES_OK;
			}
			else
			{
				/* 如果初始化失败，请执行低级格式化 */
				ff_printf("NAND_Init() Error!  \r\n");
				stat = RES_ERROR;
			}
			break;

		default :
			break;
	}
	return stat;
}



/*-----------------------------------------------------------------------*/
/* Read Sector(s)                                                        */
/*-----------------------------------------------------------------------*/

DRESULT disk_read (
	BYTE pdrv,		/* Physical drive nmuber to identify the drive */
	BYTE *buff,		/* Data buffer to store read data */
	DWORD sector,	/* Sector address in LBA */
	UINT count		/* Number of sectors to read */
)
{
	DRESULT res = RES_OK;

	switch (pdrv)
	{

		case FS_NAND :
			if (NAND_OK == NAND_ReadMultiSectors(buff, sector, 512, count))
			{
				res = RES_OK;
			}
			else
			{
				ff_printf("NAND_ReadMultiSectors() Error! sector = %d, count = %d \r\n", sector, count);
				res = RES_ERROR;
			}
			break;

		default:
			res = RES_PARERR;
			break;
	}
	return res;
}



/*-----------------------------------------------------------------------*/
/* Write Sector(s)                                                       */
/*-----------------------------------------------------------------------*/

#if _USE_WRITE
DRESULT disk_write (
	BYTE pdrv,			/* Physical drive nmuber to identify the drive */
	const BYTE *buff,	/* Data to be written */
	DWORD sector,		/* Sector address in LBA */
	UINT count			/* Number of sectors to write */
)
{
	DRESULT res = RES_OK;

	switch (pdrv)
	{
		case FS_NAND :
			if (NAND_OK == NAND_WriteMultiSectors((uint8_t *)buff, sector, 512, count))
			{
				res = RES_OK;
			}
			else
			{
				printf("NAND_WriteMultiSectors() Error! sector = %d, count = %d \r\n", sector, count);
				res = RES_ERROR;
			}
			break;

		default:
			res = RES_PARERR;
			break;
	}
	return res;
}
#endif


/*-----------------------------------------------------------------------*/
/* Miscellaneous Functions                                               */
/*-----------------------------------------------------------------------*/

#if _USE_IOCTL
DRESULT disk_ioctl (
	BYTE pdrv,		/* Physical drive nmuber (0..) */
	BYTE cmd,		/* Control code */
	void *buff		/* Buffer to send/receive control data */
)
{
	DRESULT res = RES_PARERR;

	switch (pdrv) 
	{

	case FS_NAND :
		res = RES_ERROR;
		switch (cmd)
		{
			case CTRL_SYNC :		/* Make sure that no pending write process */
				res = RES_OK;
				break;

			case GET_SECTOR_COUNT :	/* Get number of sectors on the disk (DWORD) */
				//*(DWORD*)buff = 262144;
				//*block_num =  (NAND_PAGE_SIZE / 512) * NAND_BLOCK_SIZE * NAND_ZONE_SIZE * NAND_MAX_ZONE;
				*(DWORD*)buff = NAND_FormatCapacity() / 512;	/* 必须为可用的扇区个数，不是芯片的理论容量 */
				res = RES_OK;
				break;

			case GET_SECTOR_SIZE :	/* Get R/W sector size (WORD) */
				*(WORD*)buff = 512;
				res = RES_OK;
				break;

			case GET_BLOCK_SIZE :	/* Get erase block size in unit of sector (DWORD) */\
				*(DWORD*)buff = 512;
				res = RES_OK;
				break;

			default:
				res = RES_PARERR;
				break;
		}
		break;

	default:
		res = RES_PARERR;
		break;
	}
	return res;
}
#endif

/*
*********************************************************************************************************
*	函 数 名: get_fattime
*	功能说明: 获得系统时间，用于改写文件的创建和修改时间。客户可以自行移植和系统的RTC关联起来
*	形    参: 无
*	返 回 值: 无
*********************************************************************************************************
*/
DWORD get_fattime (void)
{
	/* 如果有全局时钟，可按下面的格式进行时钟转换. 这个例子是2014-07-02 00:00:00 */
#if 0
	RTC_ReadClock();
	return  ((DWORD)(g_tRTC.Year - 1980) << 25)		/* Year  */
			| ((DWORD)g_tRTC.Mon << 21)				/* Month   */
			| ((DWORD)g_tRTC.Day << 16)				/* Day_m  1*/
			| ((DWORD)g_tRTC.Hour << 11)			/* Hour  */
			| ((DWORD)g_tRTC.Min << 5)				/* Min  */
			| ((DWORD)g_tRTC.Sec >> 1);				/* Sec  */
	
#else
	return	  ((DWORD)(2014 - 1980) << 25)	/* Year = 2014 */
			| ((DWORD)7 << 21)				/* Month = 7 */
			| ((DWORD)2 << 16)				/* Day_m = 2*/
			| ((DWORD)0 << 11)				/* Hour = 0 */
			| ((DWORD)0 << 5)				/* Min = 0 */
			| ((DWORD)0 >> 1);				/* Sec = 0 */
#endif	
}