flash_funcs.c

此压缩包为杰得开发得z228的BSP的源代码,可以实现很多功能,尤其是视频解码有很好的效果.

/***************************************************************************
*   File:    flash_funcs.c  -   Include functions implementing IoCtrl code
* 
*   The content of this file or document is CONFIDENTIAL and PROPRIETARY
*   to Jade Technologies Co., Ltd.  It is subject to the terms of a
*   License Agreement between Licensee and Jade Technologies Co., Ltd.
*   restricting among other things, the use, reproduction, distribution
*   and transfer.  Each of the embodiments, including this information 
*   and any derivative work shall retain this copyright notice.
* 
*   Copyright (c) 2005 Jade Technologies Co., Ltd. 
*   All rights reserved.
****************************************************************************/
#include "flash.h"

//------------------------------------------------------------------------------
// Macros
//------------------------------------------------------------------------------
#define REG_PROFILE_KEY     _T("Profile")
#define DEFAULT_PROFILE     _T("Default")

//------------------------------------------------------------------------------
// External Variables
//------------------------------------------------------------------------------
extern unsigned long dwBlockAddr;
extern unsigned long dwBlockStartAddr;
extern unsigned char *CacheBuf;
extern LPWSTR lpActivePath;


//------------------------------------------------------------------------------
//
// DoDiskIO - Perform requested I/O.
//            This function is called from MMC_IOControl.
//
// Arguments:
//		Opcode - indicate read or write
//		pSgr - the structure of read/write command from FAT system
//
// Functions:
//		Decode the command from FAT system, 
//		and call the corresponded functions to read or write data to Flash.   		
//
//------------------------------------------------------------------------------

#if 1
int
FLA_DoDiskIO(
    unsigned long Opcode,
    PSG_REQ pSgr
    )
{
	unsigned long status = ERROR_SUCCESS;
	unsigned long k = 0;
	unsigned long num_sg;
	unsigned long bytes_this_sg;
	unsigned long start;
	unsigned long num_sec;
	unsigned char * pBuf;
	PSG_BUF pSg;
	 
	pSgr->sr_status = ERROR_IO_PENDING;
	 
	start = pSgr->sr_start;
	num_sec = pSgr->sr_num_sec;
	num_sg = pSgr->sr_num_sg;
	pSg = &(pSgr->sr_sglist[0]);
	bytes_this_sg = pSg->sb_len;
 
	pBuf = (unsigned char *)MapCallerPtr((LPVOID)pSg->sb_buf, bytes_this_sg);
 
	RETAILMSG(MSG_FUNCS, (_T("FLASH: @start:0x%x\t@num:0x%x\r\n"), start, num_sec));
 
  // Read or write sectors from/to disk.
  while (num_sg) 
 	{
  	if (Opcode == DISK_IOCTL_READ) 
  	{
   		memcpy(pBuf, CacheBuf+start*BYTES_PER_SECTOR, bytes_this_sg);
		}
  	else 
  	{
   		memcpy(CacheBuf+start*BYTES_PER_SECTOR, pBuf, bytes_this_sg);
	  }
    // Use the next scatter/gather buffer
  	num_sg--;
    if (num_sg == 0)
       break;
		pSg++;
		start += bytes_this_sg/BYTES_PER_SECTOR;
		bytes_this_sg = pSg->sb_len;
		pBuf = (unsigned char *)MapCallerPtr((LPVOID)pSg->sb_buf, bytes_this_sg);    
	}   // while sg
 
  pSgr->sr_status = status;
  
  return status;
}   // FLA_DoDiskIO
 
#else
int
FLA_DoDiskIO(
    unsigned long Opcode,
    PSG_REQ pSgr
    )
{
	unsigned long status = ERROR_SUCCESS;
	unsigned long k = 0;
	unsigned long num_sg;
	unsigned long bytes_this_sg;
	unsigned long start;
	unsigned long num_sec;
	unsigned char * pBuf;
	PSG_BUF pSg;

	pSgr->sr_status = ERROR_IO_PENDING;
	
	start = pSgr->sr_start;
	num_sec = pSgr->sr_num_sec;
	num_sg = pSgr->sr_num_sg;
	pSg = &(pSgr->sr_sglist[0]);
	bytes_this_sg = pSg->sb_len;
	pBuf = (unsigned char *)MapPtrToProcess((LPVOID)pSg->sb_buf, GetCallerProcess());

	RETAILMSG(MSG_FUNCS, (_T("FLASH: @start:0x%x\t@num:0x%x\r\n"), start, num_sec));

    // Read or write sectors from/to disk.
    while (num_sg) 
	{
        if (Opcode == DISK_IOCTL_READ) 
		{
			memcpy(pBuf, CacheBuf+start*BYTES_PER_SECTOR, bytes_this_sg);
//			FLA_read_data(dwBlockAddr+start*BYTES_PER_SECTOR, pBuf, bytes_this_sg);
		}
		else 
		{
			memcpy(CacheBuf+start*BYTES_PER_SECTOR, pBuf, bytes_this_sg);
//			FLA_write_data(dwBlockAddr+start*BYTES_PER_SECTOR, pBuf, bytes_this_sg);
		}
        // Use the next scatter/gather buffer
        num_sg--;
        if (num_sg == 0)
            break;
        pSg++;
        pBuf = (unsigned char *)MapPtrToProcess((LPVOID)pSg->sb_buf, GetCallerProcess());
        bytes_this_sg = pSg->sb_len;
    }   // while sg

    pSgr->sr_status = status;
    return status;
}   // FLA_DoDiskIO
#endif

//------------------------------------------------------------------------------
//
// Open the drivers corresponding key in register and get the device key
//
// Arguments:
//		ActiveKey -  active device registry key
//
//------------------------------------------------------------------------------
HKEY 
FLA_OpenDriverKey(
    LPTSTR ActiveKey
    )
{
    TCHAR DevKey[256];
    HKEY hDevKey;
    HKEY hActive;
    unsigned long ValType;
    unsigned long ValLen;
    unsigned long status;

    // Get the device key from active device registry key
    status = RegOpenKeyEx(HKEY_LOCAL_MACHINE, ActiveKey, 0, 0, &hActive);

    if (status)
	{
        RETAILMSG(MSG_FUNCS, (_T("FLASH: FLA_OpenDriverKey - RegOpenKeyEx(HLM\\%s) returned %d\r\n"),
			ActiveKey, status));
        return NULL;
    }

    hDevKey = NULL;

    ValLen = sizeof(DevKey);
    status = RegQueryValueEx(
			hActive,
			DEVLOAD_DEVKEY_VALNAME,
			NULL,
			&ValType,
			(unsigned char *)DevKey,
			&ValLen);
    if (status != ERROR_SUCCESS) {
        RETAILMSG(MSG_FUNCS, (_T("FLASH: FLA_OpenDriverKey - RegQueryValueEx(%s) returned %d\r\n"),
			DEVLOAD_DEVKEY_VALNAME, status));
        goto odk_fail;
    }

    // Get the geometry values from the device key
    status = RegOpenKeyEx(HKEY_LOCAL_MACHINE, DevKey, 0, 0, &hDevKey);
    if (status) 
	{
        hDevKey = NULL;
        RETAILMSG(MSG_FUNCS, (_T("FLASH: FLA_OpenDriverKey RegOpenKeyEx - DevKey(HLM\\%s) returned %d\r\n"),
                  DevKey, status));
    }

odk_fail:
    RegCloseKey(hActive);
    return hDevKey;
}   // FLA_OpenDriverKey

//------------------------------------------------------------------------------
//
// Get folder name - as the folder's name if this card controled well by 
//		FAT system and treat as a folder 
//
// Arguments:
//		ActivePath -  path of active device registry key
//		FolderName - record the name
//		cBytes - length of the string stored the name
//		pcBytes - a pointer used in the string
//
//------------------------------------------------------------------------------
BOOL 
FLA_GetFolderName(
	LPWSTR ActivePath,
	LPWSTR FolderName,
	unsigned long cBytes,
	unsigned long * pcBytes
	)
{
	BOOL fRet = FALSE;
	HKEY DriverKey;
	unsigned long ValType;
	unsigned long status;

	DriverKey = FLA_OpenDriverKey(ActivePath);
	if (DriverKey) 
	{
		*pcBytes = cBytes;
		status = RegQueryValueEx(
				DriverKey, 
				_T("Folder"), 
				NULL, 
				&ValType, 
				(unsigned char *)FolderName, 
				pcBytes);
		if (status != ERROR_SUCCESS) 
		{
			RETAILMSG(MSG_FUNCS, (_T("FLASH: FLA_GetFolderName - RegQueryValueEx(Folder) returned %d\r\n"),status));
			*pcBytes = 0;
        } 
		else 
		{
			RETAILMSG(MSG_FUNCS, (_T("FLASH: FLA_GetFolderName - FolderName = %s, length = %d\r\n"),FolderName, *pcBytes));
			*pcBytes += sizeof(WCHAR);	// account for terminating 0.
		}
		RegCloseKey(DriverKey);
		fRet = TRUE;
		if (status || (*pcBytes == 0)) 	
			fRet = FALSE;	// Use default
	}
	return fRet;
}	// FLA_GetFolderName

//------------------------------------------------------------------------------
//
// Get device information
//
// Arguments:
//		pInfo - pointer to the buffer storaged the device information
//
//------------------------------------------------------------------------------
BOOL 
FLA_GetDeviceInfo(
	PSTORAGEDEVICEINFO pInfo
	)
{
	BOOL fRet = FALSE;
	HKEY hKeyDriver;
	unsigned long dwBytes;
	unsigned long dwStatus;
	unsigned long dwValType;

	if (pInfo)
	{
		_tcsncpy(pInfo->szProfile, DEFAULT_PROFILE, PROFILENAMESIZE);
		hKeyDriver = FLA_OpenDriverKey(lpActivePath);
		if (hKeyDriver)
		{
			// read the profile string from the active reg key if it exists
			dwBytes = sizeof(pInfo->szProfile);
			dwStatus = RegQueryValueEx(hKeyDriver, REG_PROFILE_KEY, NULL, &dwValType,
				(unsigned char *)&pInfo->szProfile, &dwBytes);  
			// if this fails, szProfile will contain the default string
		}

		// set our class, type, and flags
		pInfo->dwDeviceClass = STORAGE_DEVICE_CLASS_BLOCK;	
		pInfo->dwDeviceType = STORAGE_DEVICE_TYPE_UNKNOWN;
		pInfo->dwDeviceFlags = STORAGE_DEVICE_FLAG_READWRITE;
		fRet = TRUE;
    }
	else
		fRet = FALSE;
    return fRet;
}

static unsigned short fcstab[256] = {
0x0000, 0x1189, 0x2312, 0x329b, 0x4624, 0x57ad, 0x6536, 0x74bf,
0x8c48, 0x9dc1, 0xaf5a, 0xbed3, 0xca6c, 0xdbe5, 0xe97e, 0xf8f7,
0x1081, 0x0108, 0x3393, 0x221a, 0x56a5, 0x472c, 0x75b7, 0x643e,
0x9cc9, 0x8d40, 0xbfdb, 0xae52, 0xdaed, 0xcb64, 0xf9ff, 0xe876,
0x2102, 0x308b, 0x0210, 0x1399, 0x6726, 0x76af, 0x4434, 0x55bd,
0xad4a, 0xbcc3, 0x8e58, 0x9fd1, 0xeb6e, 0xfae7, 0xc87c, 0xd9f5,
0x3183, 0x200a, 0x1291, 0x0318, 0x77a7, 0x662e, 0x54b5, 0x453c,
0xbdcb, 0xac42, 0x9ed9, 0x8f50, 0xfbef, 0xea66, 0xd8fd, 0xc974,
0x4204, 0x538d, 0x6116, 0x709f, 0x0420, 0x15a9, 0x2732, 0x36bb,
0xce4c, 0xdfc5, 0xed5e, 0xfcd7, 0x8868, 0x99e1, 0xab7a, 0xbaf3,
0x5285, 0x430c, 0x7197, 0x601e, 0x14a1, 0x0528, 0x37b3, 0x263a,
0xdecd, 0xcf44, 0xfddf, 0xec56, 0x98e9, 0x8960, 0xbbfb, 0xaa72,
0x6306, 0x728f, 0x4014, 0x519d, 0x2522, 0x34ab, 0x0630, 0x17b9,
0xef4e, 0xfec7, 0xcc5c, 0xddd5, 0xa96a, 0xb8e3, 0x8a78, 0x9bf1,
0x7387, 0x620e, 0x5095, 0x411c, 0x35a3, 0x242a, 0x16b1, 0x0738,
0xffcf, 0xee46, 0xdcdd, 0xcd54, 0xb9eb, 0xa862, 0x9af9, 0x8b70,
0x8408, 0x9581, 0xa71a, 0xb693, 0xc22c, 0xd3a5, 0xe13e, 0xf0b7,
0x0840, 0x19c9, 0x2b52, 0x3adb, 0x4e64, 0x5fed, 0x6d76, 0x7cff,
0x9489, 0x8500, 0xb79b, 0xa612, 0xd2ad, 0xc324, 0xf1bf, 0xe036,
0x18c1, 0x0948, 0x3bd3, 0x2a5a, 0x5ee5, 0x4f6c, 0x7df7, 0x6c7e,
0xa50a, 0xb483, 0x8618, 0x9791, 0xe32e, 0xf2a7, 0xc03c, 0xd1b5,
0x2942, 0x38cb, 0x0a50, 0x1bd9, 0x6f66, 0x7eef, 0x4c74, 0x5dfd,
0xb58b, 0xa402, 0x9699, 0x8710, 0xf3af, 0xe226, 0xd0bd, 0xc134,
0x39c3, 0x284a, 0x1ad1, 0x0b58, 0x7fe7, 0x6e6e, 0x5cf5, 0x4d7c,
0xc60c, 0xd785, 0xe51e, 0xf497, 0x8028, 0x91a1, 0xa33a, 0xb2b3,
0x4a44, 0x5bcd, 0x6956, 0x78df, 0x0c60, 0x1de9, 0x2f72, 0x3efb,
0xd68d, 0xc704, 0xf59f, 0xe416, 0x90a9, 0x8120, 0xb3bb, 0xa232,
0x5ac5, 0x4b4c, 0x79d7, 0x685e, 0x1ce1, 0x0d68, 0x3ff3, 0x2e7a,
0xe70e, 0xf687, 0xc41c, 0xd595, 0xa12a, 0xb0a3, 0x8238, 0x93b1,
0x6b46, 0x7acf, 0x4854, 0x59dd, 0x2d62, 0x3ceb, 0x0e70, 0x1ff9,
0xf78f, 0xe606, 0xd49d, 0xc514, 0xb1ab, 0xa022, 0x92b9, 0x8330,
0x7bc7, 0x6a4e, 0x58d5, 0x495c, 0x3de3, 0x2c6a, 0x1ef1, 0x0f78
};

unsigned short CRC_Calculate(unsigned char *pBuf, int length)
{
	unsigned char *cp = pBuf;
	unsigned short fcs = 0xFFFF;
	while (length--)
		fcs = (fcs >> 8) ^ fcstab[(fcs ^ *cp++) & 0xff];
	fcs = ~fcs;	
	return fcs;
}