usb.c

Texas Instruments的TUSB3410芯片接键盘输入的固件程序源码和驱动程序源码。

//    WORD wTemp;

    bFUNADR = 0x00;         // no device address
    bFunctionSuspended  = FALSE;    

    // if download firmware's checksum is wrong, reboot
//    bReboot = FALSE;

    // disconnect from USB
    bUSBCTL = 0x00;             

    // a flag the bootcode knows if it has loaded firmware from i2c
//    bLoadFirmwareFromI2C = FALSE;

    // copy descriptor to allocated address
    // copy device and configuration descriptor to external memory
/*    
    for(bTemp=0;bTemp<SIZEOF_DEVICE_DESCRIPTOR;bTemp++){
        abDeviceDescriptor[bTemp] = abromDeviceDescriptor[bTemp];
        RESET_WATCHDOG;
    }

    for(bTemp=0;bTemp<SIZEOF_BOOTCODE_CONFIG_DESC_GROUP;bTemp++){
        abConfigurationDescriptorGroup[bTemp] = abromConfigurationDescriptorGroup[bTemp];
        RESET_WATCHDOG;
    }

    for(bTemp=0;bTemp<SIZEOF_BOOTCODE_STRING_DESC_GROUP;bTemp++){
        abStringDescriptor[bTemp] = abromStringDescriptor[bTemp];
        RESET_WATCHDOG;
    }
*/
/*
    #ifdef UMPDBG   // test on UMP board        
    #else
    // check if DEVVID, DEVPID, SERNUM contain pre-define values.
    if((bDEVVIDH != 0xff) && (bDEVVIDL != 0xff) && (bDEVPIDH != 0xff) && (bDEVPIDL != 0xff)){
        // update VID and PID
        abDeviceDescriptor[8]  = bDEVVIDL;
        abDeviceDescriptor[9]  = bDEVVIDH;
        abDeviceDescriptor[10] = bDEVPIDL;
        abDeviceDescriptor[11] = bDEVPIDH;
        abDeviceDescriptor[12] = bDEVREVL;
        abDeviceDescriptor[13] = bDEVREVH;

        bTemp = abDeviceDescriptor[16];     // index number
        // if index number is zero, that means it does not support serial number
        if(bTemp != 0x00){
            wTemp = 0x0000;
            // try to find the string index
            while(bTemp != 0x00){
                wTemp += (WORD)abStringDescriptor[wTemp];
                bTemp--;
            }
        
            if(wTemp != 0x0000){
                wTemp +=2;          // point to first letter
                abStringDescriptor[wTemp] = GetBCD(bSERNUM7 >> 4);
                wTemp+=2;
                abStringDescriptor[wTemp] = GetBCD(bSERNUM7 & 0x0f);
                wTemp+=2;
                abStringDescriptor[wTemp] = GetBCD(bSERNUM6 >> 4);
                wTemp+=2;
                abStringDescriptor[wTemp] = GetBCD(bSERNUM6 & 0x0f);
                wTemp+=2;
                abStringDescriptor[wTemp] = GetBCD(bSERNUM5 >> 4);
                wTemp+=2;
                abStringDescriptor[wTemp] = GetBCD(bSERNUM5 & 0x0f);
                wTemp+=2;
                abStringDescriptor[wTemp] = GetBCD(bSERNUM4 >> 4);
                wTemp+=2;
                abStringDescriptor[wTemp] = GetBCD(bSERNUM4 & 0x0f);
                wTemp+=2;
                abStringDescriptor[wTemp] = GetBCD(bSERNUM3 >> 4);
                wTemp+=2;
                abStringDescriptor[wTemp] = GetBCD(bSERNUM3 & 0x0f);
                wTemp+=2;
                abStringDescriptor[wTemp] = GetBCD(bSERNUM2 >> 4);
                wTemp+=2;
                abStringDescriptor[wTemp] = GetBCD(bSERNUM2 & 0x0f);
                wTemp+=2;
                abStringDescriptor[wTemp] = GetBCD(bSERNUM1 >> 4);
                wTemp+=2;
                abStringDescriptor[wTemp] = GetBCD(bSERNUM1 & 0x0f);
                wTemp+=2;
                abStringDescriptor[wTemp] = GetBCD(bSERNUM0 >> 4);
                wTemp+=2;
                abStringDescriptor[wTemp] = GetBCD(bSERNUM0 & 0x0f);
                wTemp+=2;
              }
        }
    }
    #endif

    #ifdef UMPDBG   // test on UMP board    
    #define bHUBCNF1    (* (char xdata *)0xFFF7)        // HUB Configuration-1 Register        
    #define bHUBCNF2    (* (char xdata *)0xFFF6)        // HUB Configuration-2 Register    
    #define bHUBPIDL    (* (char xdata *)0xFFF8)        // HUB PID Low-byte Register
    #define bHUBPIDH    (* (char xdata *)0xFFF9)        // HUB PID High-byte Register
    #define bHUBVIDL    (* (char xdata *)0xFFFA)        // HUB VID Low-byte Register
    #define bHUBVIDH    (* (char xdata *)0xFFFB)        // HUB VID High-byte Register

    // enable port 6 and keep power switch setting
    bHUBCNF1 = 0x55;
    bHUBCNF2 = 0x10;
    bHUBPIDL = 0x11;
    bHUBPIDH = 0x22;    
    bHUBVIDL = 0x33;
    bHUBVIDH = 0x44;
    P1 = 0x55;
    #endif
*/    

    // Disable endpoint 0 interrupt
    tEndPoint0DescriptorBlock.bIEPCNFG = 0x00;
    tEndPoint0DescriptorBlock.bOEPCNFG = 0x00;

    // Disable output endpoint 1 interrupt
    tOutputEndPointDescriptorBlock[0].bEPCNF   = 0x00;

    // reset 
//    UsbReset();
    
    // Enable the USB-specific Interrupts; SETUP, and RESET
    bUSBMSK =  USBMSK_SETUP | USBMSK_RSTR | USBMSK_SUSP | USBMSK_RESR | USBMSK_WAKEUP;
}

/*----------------------------------------------------------------------------+
| General Subroutines                                                         |
+----------------------------------------------------------------------------*/
//----------------------------------------------------------------------------
VOID usbStallEndpoint0(VOID)
{
    RESET_WATCHDOG;
    tEndPoint0DescriptorBlock.bIEPCNFG |= EPCNF_STALL;
    tEndPoint0DescriptorBlock.bOEPCNFG |= EPCNF_STALL;
}

//----------------------------------------------------------------------------
VOID usbClearOEP0ByteCount(VOID)
{
    RESET_WATCHDOG;
    tEndPoint0DescriptorBlock.bOEPBCNT = 0x00;
}

//----------------------------------------------------------------------------
/*
VOID usbClearIEP0ByteCount(VOID)
{
   tEndPoint0DescriptorBlock.bIEPBCNT = 0x00;
}
*/

//----------------------------------------------------------------------------
VOID usbStallOEP0(VOID)
{
    // in standard USB request, there is not control write request with data stage
    // control write, stall output endpoint 0
    // wLength should be 0 in all cases
    RESET_WATCHDOG;
    tEndPoint0DescriptorBlock.bOEPCNFG |= EPCNF_STALL;
}

//----------------------------------------------------------------------------
VOID usbSendNextPacketOnIEP0(VOID)
{
    BYTE bPacketSize,bIndex;

    // First check if there are bytes remaining to be transferred
    if(wBytesRemainingOnIEP0 != NO_MORE_DATA){
        if(wBytesRemainingOnIEP0 > EP0_PACKET_SIZE){
            // More bytes are remaining than will fit in one packet
            // there will be More IN Stage
            bPacketSize = EP0_PACKET_SIZE;
            wBytesRemainingOnIEP0 -= EP0_PACKET_SIZE;
            bStatusAction = STATUS_ACTION_DATA_IN;

        }else if (wBytesRemainingOnIEP0 < EP0_PACKET_SIZE){
            // The remaining data will fit in one packet.
            // This case will properly handle wBytesRemainingOnIEP0 == 0
            bPacketSize = (BYTE)wBytesRemainingOnIEP0;
            wBytesRemainingOnIEP0 = NO_MORE_DATA;        // No more data need to be Txed
            bStatusAction = STATUS_ACTION_NOTHING;

        }else{
            // wBytesRemainingOnIEP0 == EP0_PACKET_SIZE
            bPacketSize = EP0_PACKET_SIZE;
            if(bHostAskMoreDataThanAvailable == TRUE){
                wBytesRemainingOnIEP0 = 0;
                bStatusAction = STATUS_ACTION_DATA_IN;
            }else{ 
                wBytesRemainingOnIEP0 = NO_MORE_DATA;
                bStatusAction = STATUS_ACTION_NOTHING;
            }
        }
 
        RESET_WATCHDOG;
        for(bIndex=0; bIndex<bPacketSize; bIndex++) 
            abIEP0Buffer[bIndex] = *pbIEP0Buffer++;

        tEndPoint0DescriptorBlock.bIEPBCNT = bPacketSize;   // & EPBCT_BYTECNT_MASK;

    }else bStatusAction = STATUS_ACTION_NOTHING;
    RESET_WATCHDOG;
}

//----------------------------------------------------------------------------
VOID usbSendDataPacketOnEP0(PBYTE pbBuffer)
{
    WORD wTemp;

    pbIEP0Buffer = pbBuffer;

    wTemp = (WORD)(tSetupPacket.bLengthH << 8) | (WORD)tSetupPacket.bLengthL;

    // Limit transfer size to wLength if needed
    // this prevent USB device sending 'more than require' data back to host
    if(wBytesRemainingOnIEP0 >= wTemp){
        wBytesRemainingOnIEP0 = wTemp;
        bHostAskMoreDataThanAvailable = FALSE;
    }else bHostAskMoreDataThanAvailable = TRUE;

    usbSendNextPacketOnIEP0();
}

//----------------------------------------------------------------------------
VOID usbReceiveNextPacketOnOEP0(VOID)
{
        usbStallOEP0();
// bootcode does not use this.
/*    BYTE bIndex,bByte;

    bByte = tEndPoint0DescriptorBlock.bOEPBCNT & EPBCT_BYTECNT_MASK;

    if(wBytesRemainingOnOEP0 >= (WORD)bByte){
        for(bIndex=0;bIndex<bByte;bIndex++)
            *pbOEP0Buffer++ = abOEP0Buffer[bIndex];

        wBytesRemainingOnOEP0 -= (WORD)bByte;

        // clear the NAK bit for next packet
        if(wBytesRemainingOnOEP0 > 0){
            usbClearOEP0ByteCount();        
            bStatusAction = STATUS_ACTION_DATA_OUT;
        }else{
            usbStallOEP0();
            bStatusAction = STATUS_ACTION_NOTHING;        
        }
    }else{
        usbStallOEP0();
        bStatusAction = STATUS_ACTION_NOTHING;
    }
*/
}

//----------------------------------------------------------------------------

VOID usbReceiveDataPacketOnEP0(PBYTE pbBuffer)
{

    pbOEP0Buffer = pbBuffer;

    wBytesRemainingOnOEP0 = 
        (WORD)(tSetupPacket.bLengthH << 8) | (WORD)tSetupPacket.bLengthL;
    bStatusAction = STATUS_ACTION_DATA_OUT;

    usbClearOEP0ByteCount();            

}

//----------------------------------------------------------------------------
VOID usbSendZeroLengthPacketOnIEP0(VOID)
{
    RESET_WATCHDOG;
    wBytesRemainingOnIEP0 = NO_MORE_DATA;
    bStatusAction = STATUS_ACTION_NOTHING;
    tEndPoint0DescriptorBlock.bIEPBCNT = 0x00;
}

//----------------------------------------------------------------------------
VOID usbClearEndpointFeature(VOID)
{
    BYTE bEndpointNumber;
    
    PUTS("CL");

    // EP is from EP1 to EP7 while C language start from 0    
    bEndpointNumber = (tSetupPacket.bIndexL & EP_DESC_ADDR_EP_NUM);
    if(bEndpointNumber == 0x00) usbSendZeroLengthPacketOnIEP0();
    else{
        bEndpointNumber--;    
        #ifdef BOOTCODE
        // check if it is output endpoint 1
        // if other endpoints, ignore
        if((bEndpointNumber == 0) && ((tSetupPacket.bIndexL & EP_DESC_ADDR_DIR_IN) == 0x00)){
            // output endpoint
            tOutputEndPointDescriptorBlock[0].bEPCNF &= ~(EPCNF_STALL | EPCNF_TOGLE);
            usbSendZeroLengthPacketOnIEP0();
        }
        #else
        if(bEndpointNumber < MAX_ENDPOINT_NUMBER){
            if((tSetupPacket.bIndexL & EP_DESC_ADDR_DIR_IN) == EP_DESC_ADDR_DIR_IN){
                // input endpoint
                tInputEndPointDescriptorBlock[bEndpointNumber].bEPCNF &= ~(EPCNF_STALL | EPCNF_TOGLE);
            }else{
                // output endpoint
                tOutputEndPointDescriptorBlock[bEndpointNumber].bEPCNF &= ~(EPCNF_STALL | EPCNF_TOGLE);
            }
            usbSendZeroLengthPacketOnIEP0();
        }
        #endif        
    }        
    RESET_WATCHDOG;
}

//----------------------------------------------------------------------------
VOID usbGetConfiguration(VOID)
{
    usbClearOEP0ByteCount();                    // for status stage

    wBytesRemainingOnIEP0 = 1;
    usbSendDataPacketOnEP0((PBYTE)&bConfigurationNumber);
}


//----------------------------------------------------------------------------
//VOID usbSendDeviceDescriptor(VOID)
//{
//    wBytesRemainingOnIEP0 = SIZEOF_DEVICE_DESCRIPTOR;
//    usbClearOEP0ByteCount();                    // for status stage        
//    usbSendDataPacketOnEP0((PBYTE)&abDeviceDescriptor);
//
//}
//----------------------------------------------------------------------------
//VOID usbGetDeviceDescriptor(VOID)
//{
/*
    // this prevent that correct firmware is downloaded and get more than 
    // two setups from host
    if((bLoadFirmwareFromI2C == FALSE) && (bCurrentDataType == DATA_TYPE_HEADER_BINARY_FIRMWARE)){
        bLoadFirmwareFromI2C = TRUE;
        if(LoadBinaryFirmwareFromI2c() == NO_ERROR) bExecuteFirmware = TRUE;
        else usbSendDeviceDescriptor();
    }else if(bExecuteFirmware != TRUE) usbSendDeviceDescriptor();  // for request at second time
*/    
//    usbSendDeviceDescriptor();
//}

void usbGetDeviceDescriptor(void)
{
BYTE bTemp;

    // Copy the DEVICE DESCRIPTOR from program "ROM" to XRAM
    for(bTemp=0;bTemp<SIZEOF_DEVICE_DESCRIPTOR;bTemp++)
        abDescriptor[bTemp] = abromDeviceDescriptor[bTemp];

    usbClearOEP0ByteCount();
    wBytesRemainingOnIEP0 = SIZEOF_DEVICE_DESCRIPTOR;
    usbSendDataPacketOnEP0((PBYTE)&abDescriptor);
}

/*
//----------------------------------------------------------------------------
VOID usbGetConfigurationDescriptor(VOID)
{
    usbClearOEP0ByteCount();                    // for status stage

    wBytesRemainingOnIEP0 = SIZEOF_BOOTCODE_CONFIG_DESC_GROUP;

    usbSendDataPacketOnEP0((PBYTE)&abConfigurationDescriptorGroup);
}

//----------------------------------------------------------------------------
VOID usbGetStringDescriptor(VOID)
{
    WORD bIndex;

    usbClearOEP0ByteCount();                    // for status stage 

    bIndex = 0x00;
    while(tSetupPacket.bValueL-- >  0x00) bIndex += abStringDescriptor[bIndex];
    wBytesRemainingOnIEP0 = abStringDescriptor[bIndex];
    usbSendDataPacketOnEP0((PBYTE)&abStringDescriptor[bIndex]);

}
*/

void usbGetConfigurationDescriptor(void)
{
    BYTE bTemp;
    WORD wTemp;

    // Copy the DEVICE DESCRIPTOR from program "ROM" to XRAM
    for(bTemp=0;bTemp<sizeof(abromConfigurationDescriptorGroup);bTemp++)
        abDescriptor[bTemp] = abromConfigurationDescriptorGroup[bTemp];