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/* $FreeBSD$ */
/*-
* Copyright (c) 2008 Hans Petter Selasky. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <dev/usb2/include/usb2_mfunc.h>
#include <dev/usb2/include/usb2_standard.h>
#include <dev/usb2/include/usb2_error.h>
#include <dev/usb2/include/usb2_defs.h>
#define USB_DEBUG_VAR usb2_debug
#include <dev/usb2/core/usb2_core.h>
#include <dev/usb2/core/usb2_process.h>
#include <dev/usb2/core/usb2_busdma.h>
#include <dev/usb2/core/usb2_transfer.h>
#include <dev/usb2/core/usb2_sw_transfer.h>
#include <dev/usb2/core/usb2_device.h>
#include <dev/usb2/core/usb2_debug.h>
#include <dev/usb2/controller/usb2_controller.h>
#include <dev/usb2/controller/usb2_bus.h>
/*------------------------------------------------------------------------*
* usb2_sw_transfer - factored out code
*
* This function is basically used for the Virtual Root HUB, and can
* emulate control, bulk and interrupt endpoints. Data is exchanged
* using the "std->ptr" and "std->len" fields, that allows kernel
* virtual memory to be transferred. All state is kept in the
* structure pointed to by the "std" argument passed to this
* function. The "func" argument points to a function that is called
* back in the various states, so that the application using this
* function can get a chance to select the outcome. The "func"
* function is allowed to sleep, exiting all mutexes. If this function
* will sleep the "enter" and "start" methods must be marked
* non-cancelable, hence there is no extra cancelled checking in this
* function.
*------------------------------------------------------------------------*/
void
usb2_sw_transfer(struct usb2_sw_transfer *std,
usb2_sw_transfer_func_t *func)
{
struct usb2_xfer *xfer;
uint32_t len;
uint8_t shortpkt = 0;
xfer = std->xfer;
if (xfer == NULL) {
/* the transfer is gone */
DPRINTF("xfer gone\n");
return;
}
USB_BUS_LOCK_ASSERT(xfer->xroot->bus, MA_OWNED);
std->xfer = NULL;
/* check for control transfer */
if (xfer->flags_int.control_xfr) {
/* check if we are transferring the SETUP packet */
if (xfer->flags_int.control_hdr) {
/* copy out the USB request */
if (xfer->frlengths[0] == sizeof(std->req)) {
usb2_copy_out(xfer->frbuffers, 0,
&std->req, sizeof(std->req));
} else {
std->err = USB_ERR_INVAL;
goto done;
}
xfer->aframes = 1;
std->err = 0;
std->state = USB_SW_TR_SETUP;
(func) (xfer, std);
if (std->err) {
goto done;
}
} else {
/* skip the first frame in this case */
xfer->aframes = 1;
}
}
std->err = 0;
std->state = USB_SW_TR_PRE_DATA;
(func) (xfer, std);
if (std->err) {
goto done;
}
/* Transfer data. Iterate accross all frames. */
while (xfer->aframes != xfer->nframes) {
len = xfer->frlengths[xfer->aframes];
if (len > std->len) {
len = std->len;
shortpkt = 1;
}
if (len > 0) {
if ((xfer->endpoint & (UE_DIR_IN | UE_DIR_OUT)) == UE_DIR_IN) {
usb2_copy_in(xfer->frbuffers + xfer->aframes, 0,
std->ptr, len);
} else {
usb2_copy_out(xfer->frbuffers + xfer->aframes, 0,
std->ptr, len);
}
}
std->ptr += len;
std->len -= len;
xfer->frlengths[xfer->aframes] = len;
xfer->aframes++;
if (shortpkt) {
break;
}
}
std->err = 0;
std->state = USB_SW_TR_POST_DATA;
(func) (xfer, std);
if (std->err) {
goto done;
}
/* check if the control transfer is complete */
if (xfer->flags_int.control_xfr &&
!xfer->flags_int.control_act) {
std->err = 0;
std->state = USB_SW_TR_STATUS;
(func) (xfer, std);
if (std->err) {
goto done;
}
}
done:
DPRINTF("done err=%s\n", usb2_errstr(std->err));
std->state = USB_SW_TR_PRE_CALLBACK;
(func) (xfer, std);
}
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