system.c

嵌入式操作系统WINCE5.0下的USB驱动程序

//
// Copyright (c) Microsoft Corporation.  All rights reserved.
//
//
// Use of this source code is subject to the terms of the Microsoft end-user
// license agreement (EULA) under which you licensed this SOFTWARE PRODUCT.
// If you did not accept the terms of the EULA, you are not authorized to use
// this source code. For a copy of the EULA, please see the LICENSE.RTF on your
// install media.
//
/*++
THIS CODE AND INFORMATION IS PROVIDED "AS IS" WITHOUT WARRANTY OF
ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO
THE IMPLIED WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A
PARTICULAR PURPOSE.

Module Name:  
    system.c
    
Abstract:  
    Device dependant part of the USB Universal Host Controller Driver (EHCD).

Notes: 
--*/
#include <windows.h>
#include <nkintr.h>
#include <ceddk.h>
#include <ddkreg.h>
#include <devload.h>
#include <giisr.h>
#include <hcdddsi.h>

#define REG_PHYSICAL_PAGE_SIZE TEXT("PhysicalPageSize")

// Amount of memory to use for HCD buffer
#define gcTotalAvailablePhysicalMemory (0x20000) // 128K
#define gcHighPriorityPhysicalMemory (gcTotalAvailablePhysicalMemory/4)   // 1/4 as high priority


typedef struct _SEHCDPdd
{
    LPVOID lpvMemoryObject;
    LPVOID lpvEHCDMddObject;
    PVOID pvVirtualAddress;                        // DMA buffers as seen by the CPU
    DWORD dwPhysicalMemSize;
    PHYSICAL_ADDRESS LogicalAddress;        // DMA buffers as seen by the DMA controller and bus interfaces
    DMA_ADAPTER_OBJECT AdapterObject;
    TCHAR szDriverRegKey[MAX_PATH];
    PUCHAR ioPortBase;
    DWORD dwSysIntr;
    CRITICAL_SECTION csPdd;                     // serializes access to the PDD object
    HANDLE          IsrHandle;
    HANDLE hParentBusHandle;    
} SEHCDPdd;

#define UnusedParameter(x)  x = x

/* HcdPdd_DllMain
 * 
 *  DLL Entry point.
 *
 * Return Value:
 */
extern BOOL HcdPdd_DllMain(HANDLE hinstDLL, DWORD dwReason, LPVOID lpvReserved)
{
    UnusedParameter(hinstDLL);
    UnusedParameter(dwReason);
    UnusedParameter(lpvReserved);

    return TRUE;
}
static BOOL
GetRegistryPhysicalMemSize(
    LPCWSTR RegKeyPath,         // IN - driver registry key path
    DWORD * lpdwPhyscialMemSize)       // OUT - base address
{
    HKEY hKey;
    DWORD dwData;
    DWORD dwSize;
    DWORD dwType;
    BOOL  fRet=FALSE;
    DWORD dwRet;
    // Open key
    dwRet = RegOpenKeyEx(HKEY_LOCAL_MACHINE,RegKeyPath,0,0,&hKey);
    if (dwRet != ERROR_SUCCESS) {
        DEBUGMSG(ZONE_ERROR,(TEXT("!EHCD:GetRegistryConfig RegOpenKeyEx(%s) failed %d\r\n"),
                             RegKeyPath, dwRet));
        return FALSE;
    }

    // Read base address, range from registry and determine IOSpace
    dwSize = sizeof(dwData);
    dwRet = RegQueryValueEx(hKey, REG_PHYSICAL_PAGE_SIZE, 0, &dwType, (PUCHAR)&dwData, &dwSize);
    if (dwRet == ERROR_SUCCESS) {
        if (lpdwPhyscialMemSize)
            *lpdwPhyscialMemSize = dwData;
        fRet=TRUE;
    }
    RegCloseKey(hKey);
    return fRet;
}


/* ConfigureEHCICard
 * 
 */
BOOL
ConfigureEHCICard(
    SEHCDPdd * pPddObject, // IN - contains PDD reference pointer.
    PUCHAR *pioPortBase,   // IN - contains physical address of register base
                           // OUT- contains virtual address of register base
    DWORD dwAddrLen,
    DWORD dwIOSpace,
    INTERFACE_TYPE IfcType,
    DWORD dwBusNumber
    )
{
    ULONG               inIoSpace = dwIOSpace;
    ULONG               portBase;
    PHYSICAL_ADDRESS    ioPhysicalBase = {0, 0};
    
    portBase = (ULONG)*pioPortBase;
    ioPhysicalBase.LowPart = portBase;

    if (!BusTransBusAddrToVirtual(pPddObject->hParentBusHandle, IfcType, dwBusNumber, ioPhysicalBase, dwAddrLen, &inIoSpace, (PPVOID)pioPortBase)) {
        DEBUGMSG(ZONE_ERROR, (L"EHCD: Failed TransBusAddrToVirtual\r\n"));
        return FALSE;
    }

    DEBUGMSG(ZONE_INIT, 
             (TEXT("EHCD: ioPhysicalBase 0x%X, IoSpace 0x%X\r\n"),
              ioPhysicalBase.LowPart, inIoSpace));
    DEBUGMSG(ZONE_INIT, 
             (TEXT("EHCD: ioPortBase 0x%X, portBase 0x%X\r\n"),
              *pioPortBase, portBase));

    return TRUE;
}


/* InitializeEHCI
 *
 *  Configure and initialize EHCI card
 *
 * Return Value:
 *  Return TRUE if card could be located and configured, otherwise FALSE
 */
static BOOL 
InitializeEHCI(
    SEHCDPdd * pPddObject,    // IN - Pointer to PDD structure
    LPCWSTR szDriverRegKey)   // IN - Pointer to active registry key string
{
    PUCHAR ioPortBase = NULL;
    DWORD dwAddrLen;
    DWORD dwIOSpace;
    BOOL InstallIsr = FALSE;
    BOOL fResult = FALSE;
    LPVOID pobMem = NULL;
    LPVOID pobEHCD = NULL;
    DWORD PhysAddr;
    DWORD dwHPPhysicalMemSize;
    HKEY    hKey;
    
    DDKWINDOWINFO dwi;
    DDKISRINFO dii;
    if (RegOpenKeyEx(HKEY_LOCAL_MACHINE,szDriverRegKey,0,0,&hKey)!= ERROR_SUCCESS) {
        DEBUGMSG(ZONE_ERROR,(TEXT("InitializeEHCI:GetRegistryConfig RegOpenKeyEx(%s) failed\r\n"),
                             szDriverRegKey));
        return FALSE;
    }
    dwi.cbSize=sizeof(dwi);
    dii.cbSize=sizeof(dii);
    if ( DDKReg_GetWindowInfo(hKey, &dwi ) !=ERROR_SUCCESS || DDKReg_GetIsrInfo (hKey, &dii ) != ERROR_SUCCESS) {
        DEBUGMSG(ZONE_ERROR,(TEXT("InitializeEHCI:DDKReg_GetWindowInfo or  DDKReg_GetWindowInfo failed\r\n")));
        goto InitializeEHCI_Error;
    }
    
    if (dwi.dwNumMemWindows!=0) {
        PhysAddr = dwi.memWindows[0].dwBase;
        dwAddrLen= dwi.memWindows[0].dwLen;
        dwIOSpace = 0;
    }
    else if (dwi.dwNumIoWindows!=0) {
        PhysAddr= dwi.ioWindows[0].dwBase;
        dwAddrLen = dwi.ioWindows[0].dwLen;
        dwIOSpace = 1;
    }
    else
        goto InitializeEHCI_Error;
    
    DEBUGMSG(ZONE_INIT,(TEXT("EHCD: Read config from registry: Base Address: 0x%X, Length: 0x%X, I/O Port: %s, SysIntr: 0x%X, Interface Type: %u, Bus Number: %u\r\n"),
                        PhysAddr, dwAddrLen, dwIOSpace ? L"YES" : L"NO", dii.dwSysintr,dwi.dwInterfaceType, dwi.dwBusNumber));
    
    ioPortBase = (PUCHAR)PhysAddr;
                        
    if (!(fResult = ConfigureEHCICard(pPddObject, &ioPortBase, dwAddrLen, dwIOSpace, dwi.dwInterfaceType, dwi.dwBusNumber))) {
        goto InitializeEHCI_Error;
    }
    
    if (dii.szIsrDll[0] != 0 && dii.szIsrHandler[0]!=0 && dii.dwIrq<0xff && dii.dwIrq>0 ) {
        // Install ISR handler
        pPddObject->IsrHandle = LoadIntChainHandler(dii.szIsrDll, dii.szIsrHandler, (BYTE)dii.dwIrq);

        if (!pPddObject->IsrHandle) {
            DEBUGMSG(ZONE_ERROR, (L"EHCD: Couldn't install ISR handler\r\n"));
        } else {
            GIISR_INFO Info;
            PHYSICAL_ADDRESS PortAddress = {PhysAddr, 0};
            
            DEBUGMSG(ZONE_INIT, (L"EHCD: Installed ISR handler, Dll = '%s', Handler = '%s', Irq = %d\r\n",
                dii.szIsrDll, dii.szIsrHandler, dii.dwIrq));
            
            if (!BusTransBusAddrToStatic(pPddObject->hParentBusHandle,dwi.dwInterfaceType, dwi.dwBusNumber, PortAddress, dwAddrLen, &dwIOSpace, &(PVOID)PhysAddr)) {
                DEBUGMSG(ZONE_ERROR, (L"EHCD: Failed TransBusAddrToStatic\r\n"));
                return FALSE;
            }
        
            // Set up ISR handler
            Info.SysIntr = dii.dwSysintr;
            Info.CheckPort = TRUE;
            Info.PortIsIO = (dwIOSpace) ? TRUE : FALSE;
            Info.UseMaskReg = TRUE;
            Info.PortAddr = PhysAddr + *ioPortBase + 0x04;
            Info.PortSize = sizeof(DWORD);
            Info.MaskAddr = PhysAddr + *ioPortBase + 0x08;
            
            if (!KernelLibIoControl(pPddObject->IsrHandle, IOCTL_GIISR_INFO, &Info, sizeof(Info), NULL, 0, NULL)) {
                DEBUGMSG(ZONE_ERROR, (L"EHCD: KernelLibIoControl call failed.\r\n"));
            }
        }
    }
    
    // The PDD can supply a buffer of contiguous physical memory here, or can let the 
    // MDD try to allocate the memory from system RAM.  We will use the HalAllocateCommonBuffer()
    // API to allocate the memory and bus controller physical addresses and pass this information
    // into the MDD.
    if (GetRegistryPhysicalMemSize(szDriverRegKey,&pPddObject->dwPhysicalMemSize)) {
        // A quarter for High priority Memory.