sd_pap.c

linux 2.6下的sd卡驱动

/***************************************************************************
*   File:    sd_pap.c  -   Plug and Play
* 
*   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 "sd.h"

//------------------------------------------------------------------------------
// Global Variables in SD_PAP.C
//------------------------------------------------------------------------------
extern int g_CardStatus;	

//------------------------------------------------------------------------------
// 
// Inform OS that the card is inserted
//		See also: SDI_DetectStatus
//
//------------------------------------------------------------------------------
void SDI_DetectInsert(void)
{
}

//------------------------------------------------------------------------------
//
// Inform OS that the card is removed
//		See also: SDI_DetectStatus
//
//------------------------------------------------------------------------------
void SDI_DetectRemove(void)
{
}

//------------------------------------------------------------------------------
//
// Plug & Play Thread - created when the driver is loaded, and check the status
//		of the card. When the status changed, the routine called the two functions
//		above, to force OS open or close an instance. 
//
// Arguments:
//		controller - handle of the instance passed from the main thread. 
//
//------------------------------------------------------------------------------
unsigned long SDI_DetectStatus(LPVOID controller)
{
//	at test period, we suppose the card is always in the socket. 	
	return 1;

	if (controller == NULL || g_CardStatus == STATE_TEST)
		return 0;
	while (g_CardStatus != STATE_DEINITING)
	{
		if (g_CardStatus == STATE_OPENED)
		{
			if (!SDI_IsCardIn((SD_controller*)controller, NULL))
				SDI_DetectRemove();
		}
		if (g_CardStatus == STATE_CLOSED || g_CardStatus == STATE_INITING)
		{
			if (SDI_IsCardIn((SD_controller*)controller, NULL))
				SDI_DetectInsert();
		}
		if (g_CardStatus == STATE_DEAD)
		{
			break;
		}
		msleep(100);
	}
	g_CardStatus = STATE_DEAD;
	return 1;
}

//------------------------------------------------------------------------------
//
// Check if the card is in the socket. 
//
// Arguments:
//		controller - handle of the instance. 
//		errorcode - record error. 
//
//------------------------------------------------------------------------------
BOOL SDI_IsCardIn(SD_controller* controller, unsigned long* errorcode)
{
	unsigned long error = 0;
	if (!controller)
		error = 1;


//	at test period, we suppose the card is always in the socket. 	
	return TRUE;		// 


	if ((*(controller->SysDetect)) & 0x01)
		return TRUE;
	if (error)
	{
		if (errorcode)
			*errorcode = error;
	}
	return	FALSE;
}