vusbd11un.c
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/*HEADER******************************************************************
**************************************************************************
***
*** Copyright (c) 2001-2002 ARC International.
*** All rights reserved
***
*** This software embodies materials and concepts which are
*** confidential to ARC International and is made
*** available solely pursuant to the terms of a written license
*** agreement with ARC International
***
*** File: vusbd11.c
***
*** Comments:
*** This file contains the low-level VUSB1.1 routines.
***
**************************************************************************
*END*********************************************************************/
#ifdef __USB_OS_MQX__
#include "mqx.h"
#include "bsp.h"
#else
#include "devapi.h"
#include "usb.h"
#include "vusb11.h"
#endif
#include "usbprv.h"
#include "usbdprv.h"
/*FUNCTION*----------------------------------------------------------------
*
* Function Name : _usb_dci_vusb11_unstall_endpoint
* Returned Value : None
* Comments :
* Unstalls and endpoint and clears out its BDTs
*
*END*--------------------------------------------------------------------*/
void _usb_dci_vusb11_unstall_endpoint
(
/* [IN] Handle to the USB device */
_usb_device_handle handle,
/* [IN] Endpoint to clear */
uint_8 ep
)
{
USB_DEV_STATE_STRUCT_PTR usb_dev_ptr;
usb_dev_ptr = (USB_DEV_STATE_STRUCT_PTR)handle;
usb_dev_ptr->XDSEND[ep].CTL &= ~VUSB_EP_CTRL_STALL;
usb_dev_ptr->XDRECV[ep].CTL &= ~VUSB_EP_CTRL_STALL;
_usb_dci_vusb11_cancel_transfer(handle, USB_SEND, ep);
_usb_dci_vusb11_cancel_transfer(handle, USB_RECV, ep);
/* clear stall bit */
usb_dev_ptr->ENDPT_REGS[ep] &= ~VUSB_EP_CTRL_STALL;
return;
}
/*FUNCTION*----------------------------------------------------------------
*
* Function Name : _usb_dci_vusb11_cancel_transfer
* Returned Value : None
* Comments :
* Cancels the BDTs on the specified endpoint in the specified direction.
*
*END*--------------------------------------------------------------------*/
void _usb_dci_vusb11_cancel_transfer
(
/* [IN] Handle to the USB device */
_usb_device_handle handle,
/* [IN] Direction to cancel */
uint_8 direction,
/* [IN] Endpoint to cancel */
uint_8 ep
)
{
USB_DEV_STATE_STRUCT_PTR usb_dev_ptr;
XD_STRUCT_PTR pxd;
BDT_STRUCT_PTR BDT_PTR;
usb_dev_ptr = (USB_DEV_STATE_STRUCT_PTR)handle;
if (direction == USB_SEND) {
pxd = &usb_dev_ptr->XDSEND[ep];
} else {
pxd = &usb_dev_ptr->XDRECV[ep];
} /* Endif */
/* If packet pending:
** If 2 packets pending, dont toggle ODDEVEN
** If OWNS bit is set, disable ep reset owns toggle next oddeven
** .
*/
if (pxd->PACKETPENDING == 1) {
BDT_PTR = &usb_dev_ptr->USB_BDT_PAGE[ep][direction]\
[VUSB_TOGGLE_BIT(pxd->NEXTODDEVEN)];
if (BDT_PTR->REGISTER.BITMAP.OWNS) {
/* clear current BDT for this direction */
VUSB_CLEAR_CURRENT_BDT(&usb_dev_ptr->USB_BDT_PAGE[ep][direction]\
[VUSB_TOGGLE_BIT(pxd->NEXTODDEVEN)], pxd);
pxd->NEXTODDEVEN = VUSB_TOGGLE_BIT(pxd->NEXTODDEVEN);
} /* Endif */
} /* Endif */
if (pxd->PACKETPENDING == 2) {
BDT_PTR = &usb_dev_ptr->USB_BDT_PAGE[ep][direction][pxd->NEXTODDEVEN];
if (BDT_PTR->REGISTER.BITMAP.OWNS) {
/* clear current BDT for this direction */
VUSB_CLEAR_CURRENT_BDT(&usb_dev_ptr->USB_BDT_PAGE[ep][direction]\
[pxd->NEXTODDEVEN], pxd);
} /* Endif */
BDT_PTR = &usb_dev_ptr->USB_BDT_PAGE[ep][direction]\
[VUSB_TOGGLE_BIT(pxd->NEXTODDEVEN)];
if (BDT_PTR->REGISTER.BITMAP.OWNS) {
VUSB_CLEAR_CURRENT_BDT(&usb_dev_ptr->USB_BDT_PAGE[ep][direction]\
[VUSB_TOGGLE_BIT(pxd->NEXTODDEVEN)], pxd);
} /* Endif */
} /* Endif */
/* clear owns bit and flag as dequeued */
pxd->BDTCTL = VUSB_BDT_DEQUEUED;
/*
** Check the endpoint control register image to see if the endpoint
** is disabled or stalled, and update the status byte.
*/
if (pxd->CTL & VUSB_ENDPT_STALL_BIT) {
usb_dev_ptr->XDRECV[ep].STATUS = USB_STATUS_STALLED;
} else {
pxd->STATUS = USB_STATUS_IDLE;
} /* Endif */
return;
}
/* EOF */