usrusbhcdohciinit.c

T2.0 USB driver.rar T2.0 USB driver.rar

/* usrUsbHcdOhciInit.c - Initialization of a OHCI Host Controller Driver */

/* Copyright 1999-2001 Wind River Systems, Inc. */

/*
Modification history
--------------------
01b,16jan01,wef	 modified to search for multiple host controllers instead of
		 just one.
01a,23aug00,wef	 Created
*/

/*
DESCRIPTION

This configlette initializes a USB Host Controller if present on a system.
The initialization process includes bringing up the chip and also "attaches" 
the chip to the previously initilazed USB stack.  The stack is initialized in 
usrUsbInit.c

*/


/* includes */

#include "usb/usbPciLib.h"
#include "usb/pciConstants.h"
#include "usb/usbdLib.h"
#include "drv/usb/usbOhci.h"		
#include "drv/usb/usbHcdOhciLib.h"  


/* defines */

/* locals */

LOCAL GENERIC_HANDLE ohciAttachToken = NULL;

/*****************************************************************************
*
* usrUsbHcdOhciAttach - attaches a Host Controller to the USB Stack
*
* This function searches the pci bus for an OHCI type
* USB Host Controller.  If it finds one, it attaches it to the already
* initialized USB Stack
*
* RETURNS: OK if sucessful or ERROR if failure
*/


LOCAL STATUS usrUsbHcdOhciAttach ()
    {
    UINT16 status;
    UINT8 busNo;
    UINT8 deviceNo;
    UINT8 funcNo;
    PCI_CFG_HEADER pciCfgHdr;
    UINT8 pciClass    = OHCI_CLASS;
    UINT8 pciSubclass = OHCI_SUBCLASS;
    UINT8 pciPgmIf    = OHCI_PGMIF;
    HCD_EXEC_FUNC execFunc = &usbHcdOhciExec; 
    GENERIC_HANDLE *pToken = &ohciAttachToken;
    int idx;


    /* 
     * Loop through the maximum number of PCI devices 
     * that might be connected to a system in search of 
     * OHCI type USB Controllers. 
     *
     */

    for (idx = 0; idx < PCI_MAX_DEV; idx++)
	{

        if (!usbPciClassFind (pciClass, 
			      pciSubclass, 
			      pciPgmIf, 
			      idx, 
			      &busNo, 
			      &deviceNo, 
			      &funcNo))
            {
            printf ("%d OHCI host controller(s) found.\n", idx);
            break;
            }

	printf ("OHCI Controller found.\n");
	printf ("Waiting to attach to USBD...");

        usbPciConfigHeaderGet (busNo, deviceNo, funcNo, &pciCfgHdr);

        /* Attach the OHCI HCD to the USBD. */

        status = usbdHcdAttach (execFunc, &pciCfgHdr, pToken);


        if (status == OK)
	    {
	    printf ("Done.\n");
	    }
        else
            {
	    printf ("Error attaching host controller # %d.\n", idx);
	    return ERROR;
            }
	}
    return OK; 
    
    }