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Full Discussion: Help with Porting USB Host Stack to VXWORKS 653 OS+HPCNET8641D
Operating Systems Linux Help with Porting USB Host Stack to VXWORKS 653 OS+HPCNET8641D Post 302384137 by mark.S on Monday 4th of January 2010 06:23:50 AM
Old 01-04-2010
Bug Help with Porting USB Host Stack to VXWORKS 653 OS+HPCNET8641D
My name is Patrik Mark.S . i am using the Vxworks 653 OS with HPCNET Board with 8641D processor, Since there is no USB Host Stack in Vxworks 653 so i am tring to port UsbHost Stack onto vxworks 653. at the lowest layer(HCD Layer) of usb Host stack i need usbPciStub.c File related to my Board HPCNET. i got the template file (template_usbPciStub.c) in my BSP Folder and my interface to the Board with the Externel PMC is PCI BUS. So in this file i have to use some macros
which tells How to connect or disconnect interrupts to your Hardware.

on my board side the routing of interrupt from externel card to board is like this......




-------------------- PCI --------------- PCI-e ---------------
externel card/PMC ----------> 8114 chip -------> 8641D Core/CPU

-------------------- INTA/B/C/D --------------- tx/rx ----------------



so i am not able to get which interrupt controller in Core will Handle the Interrupt ....if possible i studied the reference manual for core also there is one pic interrupt controller and 1 pci Express interface controller also. but i didt get which controller will handle interrupts coming from my PMC......

2. also i want to ensure tht the interrupt coming from my externel card will be hardware interrupt or any software interrupt....if its software then which software interrupt


PLZ help me...
thanks in advance

mark.S
 

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LEARN ABOUT FREEBSD

ehci

EHCI(4) 						   BSD Kernel Interfaces Manual 						   EHCI(4)

NAME

     ehci -- USB Enhanced Host Controller driver

SYNOPSIS

     device ehci

DESCRIPTION

     The ehci driver provides support for the USB Enhanced Host Controller Interface, which is used by USB 2.0 controllers.

     EHCI controllers are peculiar in that they can only handle the USB 2.0 protocol.  This means that they normally have one or more companion
     controllers (i.e., ohci(4) or uhci(4)) handling USB 1.x devices.  Consequently each USB connector is electrically connected to two USB con-
     trollers.	The handling of this is totally automatic, but can be noticed since USB 1.x and USB 2.0 devices plugged in to the same connector
     appear to connect to different USB busses.

SEE ALSO

     ohci(4), uhci(4), usb(4), xhci(4)

HISTORY

     The ehci device driver first appeared in FreeBSD 5.1.

LOADER TUNABLES

     When the kernel has been compiled with options USB_DEBUG, some tunables become available that affect the behavior of ehci.  These tunables
     can be set at the loader(8) prompt before booting the kernel or stored in loader.conf(5).

     hw.usb.ehci.lostintrbug
	     This tunable enables the lost interrupt quirk.  The default value is 0 (off).

     hw.usb.ehci.iaadbug
	     This tunable enables the EHCI doorbell quirk.  The default value is 0 (off).

     hw.usb.ehci.no_hs
	     This tunable disables USB devices to attach like HIGH-speed ones and will force all attached devices to attach to the FULL- or LOW-
	     speed companion controller.  The default value is 0 (off).

BSD
								   March 4, 2012							       BSD
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