6410 IIC驱动源码

/************************************************************************************** * * Project Name : IIC Driver * * Copyright 2006 by Samsung Electronics, Inc. * All rights reserved. * * Project Description : * This software is MDD layer for IIC Samsung driver. * *-------------------------------------------------------------------------------------- * * File Name : iic_mdd.cpp * * File Description : This file implements MDD layer functions which is stream driver. * * Author : JeGeon.Jung * Dept. : AP Development Team * Created Date : 2007/06/11 * Version : 0.1 * * History * - Created(JeGeon.Jung 2007/06/11) * - Add Power Management (JeGeon.Jung 2007/06/25) * * Todo * * * Note * **************************************************************************************/ #include <windows.h> #include <types.h> #include <linklist.h> #include <nkintr.h> #include <devload.h> #include <pm.h> #include <pmplatform.h> #include <iic_mdd.h> #include <iic_pdd.h> #define DEFAULT_CE_THREAD_PRIORITY 103 #define MSG_ERROR 1 #define MSG_FUNCTION 0 #define MSG_INFO 0 #define MSG_WARN 0 CEDEVICE_POWER_STATE g_Dx; // Define some internally used functions BOOL IIC_Close(PHW_OPEN_INFO pOpenContext); BOOL IIC_Deinit(PHW_INIT_INFO pInitContext); #if DEBUG #define ZONE_INIT DEBUGZONE(0) DBGPARAM dpCurSettings = \ { \ TEXT("IIC_Driver"), \ { \ TEXT("Init"), /* 0 */ \ }, \ (0x0001) \ }; #endif ////////// // Function Name : DllEntry // Function Description : Process attach/detach api. // Input : HINSTANCE hinstDll, DWORD dwReason, LPVOID lpReserved // Output : The return is a BOOL, representing success (TRUE) or failure (FALSE). // Version : v1.0 BOOL DllEntry( HINSTANCE hinstDll, /*Instance pointer. */ DWORD dwReason, /*Reason routine is called. */ LPVOID lpReserved /*system parameter. */ ) { if ( dwReason == DLL_PROCESS_ATTACH ) { DEBUGREGISTER(hinstDll); DEBUGMSG (ZONE_INIT, (TEXT("serial port process attach\r\n"))); DisableThreadLibraryCalls((HMODULE) hinstDll); } if ( dwReason == DLL_PROCESS_DETACH ) { DEBUGMSG (ZONE_INIT, (TEXT("process detach called\r\n"))); } return(TRUE); } ////////// // Function Name : IIC_Init // Function Description : IIC device initialization. // Input : LPCTSTR pContext // Output : Returns a pointer to the serial head which is passed into // the IIC_OPEN and IIC_DEINIT entry points as a device handle. // Version : v0.5 HANDLE IIC_Init( LPCTSTR pContext /* Pointer to a string containing the registry path.*/ ) { PHW_INIT_INFO pInitContext = NULL; HKEY hKey; ULONG datasize = sizeof(ULONG); ULONG kvaluetype; RETAILMSG(MSG_FUNCTION,(TEXT("+IIC_Init\r\n"))); // Allocate our control structure. pInitContext = (PHW_INIT_INFO)LocalAlloc(LPTR, sizeof(HW_INIT_INFO)); // Check that LocalAlloc did stuff ok too. if ( !pInitContext ) { RETAILMSG(MSG_ERROR, (TEXT("Error allocating memory for pInitContext, IIC_Init failed\n\r"))); return(NULL); } //memset(pInitContext,0,sizeof(HW_INIT_INFO)); // Initially, open list is empty. InitializeListHead( &pInitContext->OpenList ); InitializeCriticalSection(&(pInitContext->OpenCS)); /* Initialize the critical sections that will guard the parts of * the receive and transmit action. */ InitializeCriticalSection(&(pInitContext->CritSec)); pInitContext->pAccessOwner = NULL; /* Want to use the Identifier to do RegOpenKey and RegQueryValue (?) * to get the index to be passed to GetHWObj. * The HWObj will also have a flag denoting whether to start the * listening thread or provide the callback. */ RETAILMSG(MSG_INFO, (TEXT("Try to open %s\r\n"), pContext)); hKey = OpenDeviceKey(pContext); if ( !hKey ) { RETAILMSG (MSG_ERROR, (TEXT("Failed to open devkeypath, IIC_Init failed\r\n"))); IIC_Deinit(pInitContext); return(NULL); } datasize = sizeof(DWORD); if ( RegQueryValueEx(hKey, L"Priority256", NULL, &kvaluetype, (LPBYTE)&pInitContext->Priority256, &datasize) ) { pInitContext->Priority256 = DEFAULT_CE_THREAD_PRIORITY; RETAILMSG (MSG_WARN, (TEXT("Failed to get Priority256 value, defaulting to %d\r\n"), pInitContext->Priority256)); } if ( RegQueryValueEx(hKey, L"SlaveAddress", NULL, &kvaluetype, (LPBYTE)&pInitContext->PDDCommonVal.SlaveAddress, &datasize) ) { pInitContext->PDDCommonVal.SlaveAddress = DEFAULT_SLAVE_ADDRESS; RETAILMSG (MSG_WARN, (TEXT("Failed to get SlaveAddress value, defaulting to %d\r\n"), pInitContext->PDDCommonVal.SlaveAddress)); } if ( RegQueryValueEx(hKey, L"Mode", NULL, &kvaluetype, (LPBYTE)&pInitContext->PDDCommonVal.InterruptEnable, &datasize) ) { pInitContext->PDDCommonVal.InterruptEnable = DEFAULT_INTERRUPT_ENABLE; RETAILMSG (MSG_WARN, (TEXT("Failed to get InterruptEnable value, defaulting to %d\r\n"), pInitContext->PDDCommonVal.InterruptEnable)); } RegCloseKey (hKey); pInitContext->State = IIC_RUN; /* Check that HW_Init did stuff ok. From here on out, call Deinit function * when things fail. */ if ( !HW_Init(pInitContext) ) { RETAILMSG (MSG_ERROR, (TEXT("Hardware doesn't init correctly, IIC_Init failed\r\n"))); IIC_Deinit(pInitContext); return(NULL); } g_Dx = D0; RETAILMSG(MSG_FUNCTION, (TEXT("-IIC_Init\r\n"))); return(pInitContext); } ////////// // Function Name : IIC_Deinit // Function Description : IIC device De-initialization. // Input : PHW_INIT_INFO pInitContext // Output : The return is a BOOL, representing success (TRUE) or failure (FALSE). // Version : v0.5 BOOL IIC_Deinit( PHW_INIT_INFO pInitContext /* Context pointer returned from IIC_Init*/ ) { RETAILMSG(MSG_FUNCTION, (TEXT("+IIC_Deinit\r\n"))); if ( !pInitContext ) { /* Can't do much without this */ RETAILMSG (MSG_ERROR, (TEXT("IIC_Deinit can't find pInitContext\r\n"))); SetLastError(ERROR_INVALID_HANDLE); return(FALSE); } /* ** Call close, if we have a user. Note that this call will ensure that ** all users are out of the serial routines before it returns, so we can ** go ahead and free our internal memory. */ EnterCriticalSection(&(pInitContext->OpenCS)); if ( pInitContext->OpenCnt ) { PLIST_ENTRY pEntry; PHW_OPEN_INFO pOpenContext; pEntry = pInitContext->OpenList.Flink; while ( pEntry != &pInitContext->OpenList ) { pOpenContext = CONTAINING_RECORD( pEntry, HW_OPEN_INFO, llist); pEntry = pEntry->Flink; // advance to next RETAILMSG (MSG_INFO, (TEXT(" Deinit - Closing Handle 0x%X\r\n"), pOpenContext )); IIC_Close(pOpenContext); } } LeaveCriticalSection(&(pInitContext->OpenCS));