usbpcistub.c

WINDRIVER MCP750 BSP

/***************************************************************************
*
* usbPciByteIn - input a byte from PCI I/O space
*
* Inputs a byte from a PCI I/O address <address>.
*
* RETURNS: byte input from i/o address
*/

UINT8 usbPciByteIn
    (
    UINT32 address		/* PCI I/O address */
    )

    {
    return OUR_PCI_IN_BYTE (address);
    }


/***************************************************************************
*
* usbPciWordIn - input a word from PCI I/O space
*
* Inputs a word from a PCI I/O address <address>.
*
* NOTE: This function adjusts for big vs. little endian environments.
*
* RETURNS: word input from i/o address
*/

UINT16 usbPciWordIn
    (
    UINT32 address		/* PCI I/O address */
    )

    {
    UINT16 w = OUR_PCI_IN_WORD (address);
    return FROM_LITTLEW (w);
    }


/***************************************************************************
*
* usbPciDwordIn - input a dword from PCI I/O space
*
* Inputs a dword from a PCI I/O address <address>.
*
* NOTE: This function adjusts for big vs. little endian environments.
*
* RETURNS: dword input from i/o address
*/

UINT32 usbPciDwordIn
    (
    UINT32 address		/* PCI I/O address */
    )

    {
    UINT32 l = OUR_PCI_IN_DWORD (address);
    return FROM_LITTLEL (l);
    }


/***************************************************************************
*
* usbPciByteOut - output a byte to PCI I/O space
*
* Outputs <value> to the PCI I/O address <address>.
*
* RETURNS: N/A
*/

VOID usbPciByteOut
    (
    UINT32 address,		/* PCI I/O address */
    UINT8 value 		/* value */
    )

    {
    OUR_PCI_OUT_BYTE (address, value);
    CACHE_PIPE_FLUSH ();
    }


/***************************************************************************
*
* usbPciWordOut - outputs a word to PCI I/O space
*
* Outputs <value> to the PCI I/O address <address>.
*
* NOTE: This function adjusts for big vs. little endian environments.
*
* RETURNS: N/A
*/

VOID usbPciWordOut
    (
    UINT32 address,		/* PCI I/O address */
    UINT16 value		/* value */
    )

    {
    UINT16 w = TO_LITTLEW (value);
    OUR_PCI_OUT_WORD (address, w);
    CACHE_PIPE_FLUSH ();
    }


/***************************************************************************
*
* usbPciDwordOut - outputs a dword to PCI I/O space
*
* Outputs <value> to the PCI I/O address <address>.
*
* NOTE: This function adjusts for big vs. little endian environments.
*
* RETURNS: N/A
*/

VOID usbPciDwordOut
    (
    UINT32 address,		/* PCI I/O address */
    UINT32 value		/* value */
    )

    {
    UINT32 l = TO_LITTLEL (value);
    OUR_PCI_OUT_DWORD (address, l);
    CACHE_PIPE_FLUSH ();
    }


/***************************************************************************
*
* usbPciMemioOffset - Return PCI MEMIO to CPU MEMIO offset
*
* For memory-mapped I/O, the CPU's view of a memory address may not be the
* same as that programmed into the base address register of a PCI adapter.
* The CPU should add the value returned by this function to the BAR in order
* to produce the correct CPU-visible memory address.
*
* RETURNS: PCI_MEMIO_OFFSET
*/

UINT32 usbPciMemioOffset (void)
    {
    return PCI_MEMIO_OFFSET;
    }


/***************************************************************************
*
* usbMemToPci - Convert a memory address to a PCI-reachable memory address
*
* Converts <pMem> to an equivalent 32-bit memory address visible from the 
* PCI bus.  This conversion is necessary to allow PCI bus masters to address
* the same memory viewed by the processor.
*
* RETURNS: converted memory address
*/

UINT32 usbMemToPci
    (
    pVOID pMem			/* memory address to convert */
    )

    {
    pVOID pPhys;
    
    /* The conversion is a two-step process.  First, we need to convert the
     * logical processor address (virtual) to a physical address.  Then, we
     * convert the physical address to one which can be seen from the PCI
     * bus.
     */

    pPhys = CACHE_DRV_VIRT_TO_PHYS (&cacheUserFuncs, pMem);

    return ((UINT32) pPhys) + PCI_MEM_OFFSET;

    }


/***************************************************************************
*
* usbPciToMem - Convert a PCI-reachable address to a CPU-reachable pointer
*
* Converts <pciAdrs> to an equivalent CPU memory address.  
*
* RETURNS: pointer to PCI memory
*/

pVOID usbPciToMem
    (
    UINT32 pciAdrs		/* 32-bit PCI address to be converted */
    )

    {

    return CACHE_DRV_PHYS_TO_VIRT (&cacheUserFuncs, 
	(void *) (pciAdrs - PCI_MEM_OFFSET));

    }


/***************************************************************************
*
* usbPciMemInvalidate - Invalidate cache for a region of memory
*
* When another bus master, such as a PCI bus master, writes to memory, the
* cache may need to be invalidated for that region of memory.
*
* NOTE: Returns immediately if size == 0.
*
* RETURNS: N/A
*/

VOID usbPciMemInvalidate
    (
    pVOID pMem, 		/* base of memory region to invalidate */
    UINT32 size 		/* size of region to invalidate */
    )

    {
    if (size != 0)
	CACHE_USER_INVALIDATE (pMem, size);
    }


/***************************************************************************
*
* usbPciMemFlush - Flush a region of memory through the cache
*
* In systems which implement a non-write-thru cache, the processor may have
* written data to memory which has not yet been flushed to the actual system
* memory.  Before other bus masters may interrogate this memory, it may be
* necessary to flush the cache.
*
* NOTE: Returns immediately if size == 0.
*
* RETURNS: N/A
*/

VOID usbPciMemFlush
    (
    pVOID pMem, 		/* base of memory region to invalidate */
    UINT32 size 		/* size of region to invalidate */
    )

    {
    if (size != 0)
	CACHE_USER_FLUSH (pMem, size);
    }


/***************************************************************************
*
* usbPciIntConnect - Connect to a interrupt vector
*
* Connects the <func> to the interrupt number <intNo>.	<param> is an
* application-specific value which will be passed to <func> each time
* the interrupt handler is invoked.  
*
* RETURNS: OK, or ERROR if unable to connect/enable interrupt
*/

STATUS usbPciIntConnect
    (
    INT_HANDLER_PROTOTYPE func,     /* new interrupt handler */
    pVOID param,		    /* parameter for int handler */
    UINT16 intNo		    /* interrupt vector number */
    )

    {
    if (INT_CONNECT (intNo, func, param) != OK)
	return ERROR;

    if (INT_ENABLE (intNo) != OK)
	{
	INT_DISCONNECT (intNo, func, param);
	return ERROR;
	}

    if (intNo < MAX_INT_NO) 
	intUsage [intNo]++;

    return OK;
    }


/***************************************************************************
*
* usbPciIntDisconnect - Removes an interrupt handler
*
* Removes an interrupt handler installed by usbPciIntConnect().  <func>,
* <param>, and <intNo> must match the corresponding parameters from an earlier 
* call to usbPciIntConnect().
*
* RETURNS: N/A
*/

VOID usbPciIntRestore
    (
    INT_HANDLER_PROTOTYPE func,     /* int handler to be removed */
    pVOID param,		    /* parameter for int handler */
    UINT16 intNo		    /* interrupt vector number */
    )

    {
    if (intNo >= MAX_INT_NO || 
	(intUsage [intNo] != 0 && --intUsage [intNo] == 0))
	{
	INT_DISABLE (intNo);
	}

    INT_DISCONNECT (intNo, func, param);
    }


/* End of file. */