usbohci.c

usb2 driver for vxwokrs

                        uRegisterValue);

    USB_OHCI_REG_WRITE (uHostControllerIndex, 
                        (pOhciControllerInfo->uBaseAddress + 
                        USB_OHCI_RH_DESCRIPTOR_B_REGISTER_OFFSET),
                        0xFFFF0000);

    /* Disable and power off the ports and again power on the ports */
    usbOhciPowerOffPorts(uHostControllerIndex);

    /* 
     * Clear any pending interrupts 
     */
    USB_OHCI_REG_WRITE (uHostControllerIndex, 
		(pOhciControllerInfo->uBaseAddress + 
         USB_OHCI_INTERRUPT_STATUS_REGISTER_OFFSET),
		USB_OHCI_INTERRUPT_MASK);

#ifndef USB_OHCI_POLLING_MODE
    /* Create the ISR event */
    pOhciControllerInfo->isrEvent = OS_CREATE_EVENT(OS_EVENT_NON_SIGNALED);

    /* Check whether the event was created successfully */
    if (OS_INVALID_EVENT_ID == pOhciControllerInfo->isrEvent)
    {
        /* Failed to create ISR event */
        OS_LOG_MESSAGE_HIGH(
            OHCD, "Failed to create ISR event.\n", 0, 0, 0, 0);

        return FALSE;
    }

    /* Register the interrupt handler for the OHCI Controller */

    uTemp = (UINT32) uHostControllerIndex;

    /* Call the function to register an ISR */
 
    if (pOhciBusInfo[uHostControllerIndex]->pFuncIntConnect != NULL)
        uStatus = pOhciBusInfo[uHostControllerIndex]->pFuncIntConnect
                                         (usbOhciIsr,
                                          uTemp,
                                          pOhciControllerInfo->uIrqNumber);
    else
        uStatus = BUS_OPERATION_FAILURE;

    /* Check whether the interrupt handler was registered successfully */
    if (uStatus == BUS_OPERATION_FAILURE)
    	{
        /* Failed to register the interrupt handler */
        return FALSE;
    	}
	
    /* Enable all the OHCI interrupts */
    USB_OHCI_REG_WRITE (uHostControllerIndex, 
		(pOhciControllerInfo->uBaseAddress + 
         USB_OHCI_INTERRUPT_ENABLE_REGISTER_OFFSET),
		USB_OHCI_INTERRUPT_MASK);
#endif /* End of #ifndef USB_OHCI_POLLING_MODE */


    /* Spawn the interrupt handler in polling mode */
    pOhciControllerInfo->isrThreadId = 
        OS_CREATE_THREAD("usbOhciIsr",            /* Task Name */
                         100,                   /* Task Priority */
                         usbOhciPollingIsr,      /* Task Entry Function */
                         uHostControllerIndex); /* Argument to the task */

    /* Check whether the interrupt handler thread was created successfully */
    if (pOhciControllerInfo->isrThreadId == OS_THREAD_FAILURE)
    	{
        /* Debug message */
        OS_LOG_MESSAGE_HIGH (
            OHCD, 
            "Failed to spawn the interrupt handler thread.....\n", 
            0,
            0, 
            0, 
            0);

        /* Failed to spawn the interrupt handler */
        return FALSE;
    	}

    /* Initialize the OHCI Controller (END) */

    /* Set the flag to indicate the host controller is initialized */
    pOhciControllerInfo->bHostControllerInitialized = TRUE;
    OS_LOG_MESSAGE_LOW(
        OHCD,
        "Exiting the function: usbOhciInitializeHostController().\n", 
        0, 
        0, 
        0,
        0);

    return TRUE;

	} /* End of function usbOhciInitializeHostController() */

VOID usbOhciPowerOffPorts
	(
	UINT32   uHostControllerIndex
	)

	{
    /* To hold the base address of the OHCI Controller */
    UINT32  uBaseAddress = 0;

    /* To hold the value read from the registers */
    UINT32  uRegisterValue = 0;

    /* To hold the loop index */
    UINT32  uIndex = 0;

    /* To hold the offset of the port status register */
    UINT32  uPortStatusRegisterOffset = 0;

    /* To hold the number of downstream ports */
    UINT32  uNumberOfDownstreamPorts = 0;

    /* To hold the pointer to the host controller information */
    PUSB_OHCI_INFORMATION   pOhciControllerInfo = NULL;

    OS_LOG_MESSAGE_LOW(
        OHCD,
        "Entering the function: usbOhciPowerOffPorts().\n", 
        0, 
        0, 
        0, 
        0);

    /* Obtain the pointer to the host controller information */
    pOhciControllerInfo = &usbOhciControllerInfo[uHostControllerIndex];

    /* Obtain the base address */
    uBaseAddress = pOhciControllerInfo->uBaseAddress;

    /* 
     * NOTE: If the root hub supports ganged power on the down stream ports, 
     *       power on all the downstream ports. Else power on the specified 
     *       port.
     */

    /* Read the contents of the root hub descriptor A register */
    uRegisterValue = 
        USB_OHCI_REG_READ(uHostControllerIndex, uBaseAddress +
            USB_OHCI_RH_DESCRIPTOR_A_REGISTER_OFFSET);




     uNumberOfDownstreamPorts = USB_OHCI_REG_READ(uHostControllerIndex, 
                uBaseAddress + USB_OHCI_RH_DESCRIPTOR_A_REGISTER_OFFSET);

     /* Mask the other fields of the root hub description register */
     uNumberOfDownstreamPorts = uNumberOfDownstreamPorts & 0x000000FF;

     /* Obtain the number of ports supported by the host controller (END) */

     /* Disable all the downstream ports then power up the ports*/
     for (uIndex = 1; uIndex <= uNumberOfDownstreamPorts; uIndex++)
        {
             uPortStatusRegisterOffset =
             USB_OHCI_RH_PORT_STATUS_REGISTER_OFFSET(uIndex);

             /* Read the contents of the port status register */
             uRegisterValue = USB_OHCI_REG_READ(uHostControllerIndex,
                                        uBaseAddress + uPortStatusRegisterOffset);

             /* Clear Port Enable */
             USB_OHCI_REG_WRITE(uHostControllerIndex,
                               (uBaseAddress + uPortStatusRegisterOffset),
                                USB_OHCI_RH_PORT_STATUS_CCS);
         }



    /* 
     * Check whether the root hub supports ganged power on the down
     * stream ports.
     */
    if ((uRegisterValue & USB_OHCI_RH_DESCRIPTOR_A_REGISTER__PSM_MASK) == 0)
    	{
        /* 
         * NOTE: Write 1 to the Local Power Status Change (LPSC) bit 
         *       to set the port power state.
         */

        USB_OHCI_REG_WRITE(uHostControllerIndex, 
                          (uBaseAddress + USB_OHCI_RH_STATUS_REGISTER_OFFSET), 
                           USB_OHCI_RH_STATUS__LPS);

        /* Return from the function */
        return;
    	}


       /*
        * Read the contents of the root hub descriptor B
        * register
        */
        uRegisterValue =  USB_OHCI_REG_READ(uHostControllerIndex, 
                                 uBaseAddress + 
                                 USB_OHCI_RH_DESCRIPTOR_B_REGISTER_OFFSET);

      /*
       * Check whether the Port Power Control Mask bit
       * is set for the specified port.
       *
       * a) If this bit is set, the port's power state
       *    is only affected by per-port power control
       *    (Set/ClearPortPower).
       * b) If this bit is cleared, th port is
       *    controlled by the global power switch 
       *    (Set/ClearGlobalPower).
       */


       if (0 == 
           (uRegisterValue & 
           USB_OHCI_HC_RH_DESCRIPTOR_B_REGISTER__PPCM_MASK))
       {
         /* 
          * Port power state is controlled by the 
          * global power switch 
          */

         /* 
          * NOTE: Write 1 to the Local Power Status (LPS) 
          *       bit to clear the port power state.
          */

         /* 
          * Root hub supports ganged power. Power off 
          * all the down stream ports 
          */
          USB_OHCI_REG_WRITE(uHostControllerIndex,
                            (uBaseAddress + USB_OHCI_RH_STATUS_REGISTER_OFFSET),
                             USB_OHCI_RH_STATUS__LPS);
          return;
                              		
	}
					

    /* Obtain the number of ports supported by the host controller (BEGIN) */

    /* Read the contents of the root hub description register */
    uNumberOfDownstreamPorts = USB_OHCI_REG_READ(uHostControllerIndex, 
		            uBaseAddress + 
                            USB_OHCI_RH_DESCRIPTOR_A_REGISTER_OFFSET);

    /* Mask the other fields of the root hub description register */
    uNumberOfDownstreamPorts = uNumberOfDownstreamPorts & 0x000000FF;

    /* Obtain the number of ports supported by the host controller (END) */

    /* Power on all the downstream ports */
    for (uIndex = 1; uIndex <= uNumberOfDownstreamPorts; uIndex++)
    	{
        /* Obtain the base address of the port status register */
        uPortStatusRegisterOffset = 
            USB_OHCI_RH_PORT_STATUS_REGISTER_OFFSET(uIndex);

        /* Read the contents of the port status register */
        uRegisterValue = 
            USB_OHCI_REG_READ(uHostControllerIndex, 
                              uBaseAddress + uPortStatusRegisterOffset);


       	/*
       	 * NOTE: Write 1 to the Low Speed Device Attach
 	 * (LSDA) bit to clear the port power state.
         */
        /* Clear the port power state */
        USB_OHCI_REG_WRITE(uHostControllerIndex, 
                          (uBaseAddress +  uPortStatusRegisterOffset),
                           USB_OHCI_RH_PORT_STATUS_LSDA);

    	}
    OS_LOG_MESSAGE_LOW(
        OHCD,
        "Exiting the function: usbOhciPowerOffPorts().\n", 
        0, 
        0, 
        0, 
        0);    

    return;

	} /* End of function usbOhciPowerOffPorts () */

/*******************************************************************************
*
* usbOhciDisable - function to disable the OHCI controller
*
* This function is called on a warm reboot. It power-offs all the port of the 
* controller followed by resetting hte host controller.
*
* RETURNS: N/A
* 
* ERRNO: none
*
* \NOMANUAL
*/

LOCAL VOID usbOhciDisable
    (
    int    startType
    )

    {
    /* To hold the pointer to the host controller information */
    PUSB_OHCI_INFORMATION   pOhciControllerInfo = NULL;
    UINT8       index = 0;

    /* if the global array is NULL, return */

    if (usbOhciControllerInfo == NULL || maxOhciCount == 0)
        return;

    while (index < maxOhciCount)
        {
         pOhciControllerInfo = &usbOhciControllerInfo[index];

        if (pOhciControllerInfo)
            {
            /* power off the ports */

            usbOhciPowerOffPorts (index);

            /* Reset the OHCI Controller */

            USB_OHCI_REG_WRITE (index,
            (pOhciControllerInfo->uBaseAddress +
                USB_OHCI_COMMAND_STATUS_REGISTER_OFFSET),
			USB_OHCI_COMMAND_STATUS_HCR);

#ifndef USB_OHCI_POLLING_MODE
            /* Unregister the IRQ */

            if ((pOhciBusInfo[index] != NULL) &&
                (pOhciBusInfo[index]->pFuncIntDisconnect != NULL))

                pOhciBusInfo[index]->pFuncIntDisconnect
                                     (usbOhciIsr,
                                      index,
                                      pOhciControllerInfo->uIrqNumber);
#endif
            }
	 index++;
         }

    return;
    }

#ifdef NO_CACHE_COHERENCY
/***************************************************************************
*
* usbOhciRegWrite - write contents to a HC register
*
* This function is used to write the contents to a host controller register.
*
* RETURNS: None
*
* ERRNO:
*   None.
* 
* \NOMANUAL
*/

VOID usbOhciRegWrite
    (
    UINT32	index,	/* Index of host controller */
    UINT32	address,/* Address to which contents have to be written  */
    UINT32	value   /* Value to be written */  
    )
    {
    (*((volatile UINT32 *) (address)) =                       
            (USB_OHCD_SWAP_DATA (index, (value)))) ;		

    cacheFlush(DATA_CACHE,(pVOID)address, 4);			   
    }

/***************************************************************************
*
* usbOhciRegRead - read contents of a HC register
*
* This function is used to read the contents of a host controller register.
*
* RETURNS: UINT32 value which indicates contents of the register
*
* ERRNO:
*   None.
* 
* \NOMANUAL
*/

UINT32 usbOhciRegRead
    (
    UINT32 index,	/* Index of host controller */
    UINT32 address     /* Address from which contents have to be read  */
    )
    {
    cacheInvalidate(DATA_CACHE, (pVOID)address, 4);
    return (USB_OHCD_SWAP_DATA (index, *((volatile UINT32 *)address)));
    } 

#endif /* End of NO_CACHE_COHERENCY */

/* End of File usbOhci.c */