812 lines
19 KiB
C
812 lines
19 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause
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*
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* Copyright (c) 2008 Hans Petter Selasky. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifdef USB_GLOBAL_INCLUDE_FILE
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#include USB_GLOBAL_INCLUDE_FILE
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#else
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#include <sys/stdint.h>
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#include <sys/stddef.h>
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#include <sys/param.h>
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#include <sys/queue.h>
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#include <sys/types.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/bus.h>
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#include <sys/module.h>
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#include <sys/lock.h>
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#include <sys/mutex.h>
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#include <sys/condvar.h>
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#include <sys/sysctl.h>
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#include <sys/sx.h>
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#include <sys/unistd.h>
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#include <sys/callout.h>
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#include <sys/malloc.h>
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#include <sys/priv.h>
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#include <dev/usb/usb.h>
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#include <dev/usb/usbdi.h>
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#include <dev/usb/usbdi_util.h>
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#include "usb_if.h"
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#define USB_DEBUG_VAR usb_debug
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#include <dev/usb/usb_core.h>
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#include <dev/usb/usb_process.h>
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#include <dev/usb/usb_busdma.h>
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#include <dev/usb/usb_transfer.h>
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#include <dev/usb/usb_device.h>
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#include <dev/usb/usb_debug.h>
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#include <dev/usb/usb_dynamic.h>
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#include <dev/usb/usb_hub.h>
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#include <dev/usb/usb_controller.h>
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#include <dev/usb/usb_bus.h>
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#endif /* USB_GLOBAL_INCLUDE_FILE */
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/* function prototypes */
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static uint8_t usb_handle_get_stall(struct usb_device *, uint8_t);
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static usb_error_t usb_handle_remote_wakeup(struct usb_xfer *, uint8_t);
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static usb_error_t usb_handle_request(struct usb_xfer *);
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static usb_error_t usb_handle_set_config(struct usb_xfer *, uint8_t);
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static usb_error_t usb_handle_set_stall(struct usb_xfer *, uint8_t,
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uint8_t);
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static usb_error_t usb_handle_iface_request(struct usb_xfer *, void **,
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uint16_t *, struct usb_device_request, uint16_t,
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uint8_t);
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/*------------------------------------------------------------------------*
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* usb_handle_request_callback
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*
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* This function is the USB callback for generic USB Device control
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* transfers.
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*------------------------------------------------------------------------*/
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void
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usb_handle_request_callback(struct usb_xfer *xfer, usb_error_t error)
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{
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usb_error_t err;
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/* check the current transfer state */
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switch (USB_GET_STATE(xfer)) {
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case USB_ST_SETUP:
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case USB_ST_TRANSFERRED:
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/* handle the request */
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err = usb_handle_request(xfer);
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if (err) {
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if (err == USB_ERR_BAD_CONTEXT) {
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/* we need to re-setup the control transfer */
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usb_needs_explore(xfer->xroot->bus, 0);
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break;
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}
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goto tr_restart;
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}
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usbd_transfer_submit(xfer);
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break;
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default:
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/* check if a control transfer is active */
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if (xfer->flags_int.control_rem != 0xFFFF) {
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/* handle the request */
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err = usb_handle_request(xfer);
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}
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if (xfer->error != USB_ERR_CANCELLED) {
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/* should not happen - try stalling */
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goto tr_restart;
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}
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break;
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}
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return;
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tr_restart:
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/*
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* If a control transfer is active, stall it, and wait for the
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* next control transfer.
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*/
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usbd_xfer_set_frame_len(xfer, 0, sizeof(struct usb_device_request));
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xfer->nframes = 1;
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xfer->flags.manual_status = 1;
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xfer->flags.force_short_xfer = 0;
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usbd_xfer_set_stall(xfer); /* cancel previous transfer, if any */
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usbd_transfer_submit(xfer);
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}
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/*------------------------------------------------------------------------*
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* usb_handle_set_config
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*
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* Returns:
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* 0: Success
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* Else: Failure
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*------------------------------------------------------------------------*/
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static usb_error_t
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usb_handle_set_config(struct usb_xfer *xfer, uint8_t conf_no)
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{
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struct usb_device *udev = xfer->xroot->udev;
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usb_error_t err = 0;
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uint8_t do_unlock;
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/*
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* We need to protect against other threads doing probe and
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* attach:
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*/
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USB_XFER_UNLOCK(xfer);
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/* Prevent re-enumeration */
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do_unlock = usbd_enum_lock(udev);
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if (conf_no == USB_UNCONFIG_NO) {
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conf_no = USB_UNCONFIG_INDEX;
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} else {
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/*
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* The relationship between config number and config index
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* is very simple in our case:
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*/
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conf_no--;
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}
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if (usbd_set_config_index(udev, conf_no)) {
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DPRINTF("set config %d failed\n", conf_no);
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err = USB_ERR_STALLED;
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goto done;
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}
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if (usb_probe_and_attach(udev, USB_IFACE_INDEX_ANY)) {
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DPRINTF("probe and attach failed\n");
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err = USB_ERR_STALLED;
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goto done;
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}
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done:
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if (do_unlock)
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usbd_enum_unlock(udev);
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USB_XFER_LOCK(xfer);
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return (err);
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}
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static usb_error_t
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usb_check_alt_setting(struct usb_device *udev,
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struct usb_interface *iface, uint8_t alt_index)
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{
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uint8_t do_unlock;
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usb_error_t err = 0;
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/* Prevent re-enumeration */
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do_unlock = usbd_enum_lock(udev);
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if (alt_index >= usbd_get_no_alts(udev->cdesc, iface->idesc))
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err = USB_ERR_INVAL;
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if (do_unlock)
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usbd_enum_unlock(udev);
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return (err);
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}
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/*------------------------------------------------------------------------*
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* usb_handle_iface_request
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*
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* Returns:
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* 0: Success
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* Else: Failure
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*------------------------------------------------------------------------*/
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static usb_error_t
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usb_handle_iface_request(struct usb_xfer *xfer,
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void **ppdata, uint16_t *plen,
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struct usb_device_request req, uint16_t off, uint8_t state)
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{
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struct usb_interface *iface;
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struct usb_interface *iface_parent; /* parent interface */
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struct usb_device *udev = xfer->xroot->udev;
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int error;
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uint8_t iface_index;
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uint8_t temp_state;
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uint8_t do_unlock;
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if ((req.bmRequestType & 0x1F) == UT_INTERFACE) {
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iface_index = req.wIndex[0]; /* unicast */
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} else {
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iface_index = 0; /* broadcast */
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}
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/*
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* We need to protect against other threads doing probe and
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* attach:
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*/
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USB_XFER_UNLOCK(xfer);
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/* Prevent re-enumeration */
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do_unlock = usbd_enum_lock(udev);
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error = ENXIO;
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tr_repeat:
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iface = usbd_get_iface(udev, iface_index);
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if ((iface == NULL) ||
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(iface->idesc == NULL)) {
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/* end of interfaces non-existing interface */
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goto tr_stalled;
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}
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/* set initial state */
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temp_state = state;
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/* forward request to interface, if any */
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if ((error != 0) &&
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(error != ENOTTY) &&
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(iface->subdev != NULL) &&
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device_is_attached(iface->subdev)) {
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#if 0
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DEVMETHOD(usb_handle_request, NULL); /* dummy */
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#endif
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error = USB_HANDLE_REQUEST(iface->subdev,
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&req, ppdata, plen,
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off, &temp_state);
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}
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iface_parent = usbd_get_iface(udev, iface->parent_iface_index);
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if ((iface_parent == NULL) ||
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(iface_parent->idesc == NULL)) {
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/* non-existing interface */
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iface_parent = NULL;
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}
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/* forward request to parent interface, if any */
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if ((error != 0) &&
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(error != ENOTTY) &&
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(iface_parent != NULL) &&
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(iface_parent->subdev != NULL) &&
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((req.bmRequestType & 0x1F) == UT_INTERFACE) &&
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(iface_parent->subdev != iface->subdev) &&
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device_is_attached(iface_parent->subdev)) {
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error = USB_HANDLE_REQUEST(iface_parent->subdev,
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&req, ppdata, plen, off, &temp_state);
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}
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if (error == 0) {
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/* negativly adjust pointer and length */
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*ppdata = ((uint8_t *)(*ppdata)) - off;
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*plen += off;
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if ((state == USB_HR_NOT_COMPLETE) &&
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(temp_state == USB_HR_COMPLETE_OK))
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goto tr_short;
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else
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goto tr_valid;
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} else if (error == ENOTTY) {
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goto tr_stalled;
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}
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if ((req.bmRequestType & 0x1F) != UT_INTERFACE) {
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iface_index++; /* iterate */
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goto tr_repeat;
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}
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if (state != USB_HR_NOT_COMPLETE) {
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/* we are complete */
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goto tr_valid;
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}
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switch (req.bmRequestType) {
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case UT_WRITE_INTERFACE:
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switch (req.bRequest) {
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case UR_SET_INTERFACE:
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/*
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* We assume that the endpoints are the same
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* across the alternate settings.
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*
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* Reset the endpoints, because re-attaching
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* only a part of the device is not possible.
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*/
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error = usb_check_alt_setting(udev,
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iface, req.wValue[0]);
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if (error) {
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DPRINTF("alt setting does not exist %s\n",
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usbd_errstr(error));
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goto tr_stalled;
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}
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error = usb_reset_iface_endpoints(udev, iface_index);
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if (error) {
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DPRINTF("alt setting failed %s\n",
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usbd_errstr(error));
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goto tr_stalled;
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}
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/* update the current alternate setting */
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iface->alt_index = req.wValue[0];
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break;
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default:
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goto tr_stalled;
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}
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break;
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case UT_READ_INTERFACE:
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switch (req.bRequest) {
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case UR_GET_INTERFACE:
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*ppdata = &iface->alt_index;
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*plen = 1;
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break;
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default:
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goto tr_stalled;
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}
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break;
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default:
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goto tr_stalled;
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}
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tr_valid:
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if (do_unlock)
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usbd_enum_unlock(udev);
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USB_XFER_LOCK(xfer);
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return (0);
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tr_short:
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if (do_unlock)
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usbd_enum_unlock(udev);
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USB_XFER_LOCK(xfer);
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return (USB_ERR_SHORT_XFER);
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tr_stalled:
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if (do_unlock)
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usbd_enum_unlock(udev);
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USB_XFER_LOCK(xfer);
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return (USB_ERR_STALLED);
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}
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/*------------------------------------------------------------------------*
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* usb_handle_stall
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*
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* Returns:
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* 0: Success
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* Else: Failure
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*------------------------------------------------------------------------*/
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static usb_error_t
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usb_handle_set_stall(struct usb_xfer *xfer, uint8_t ep, uint8_t do_stall)
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{
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struct usb_device *udev = xfer->xroot->udev;
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usb_error_t err;
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USB_XFER_UNLOCK(xfer);
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err = usbd_set_endpoint_stall(udev,
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usbd_get_ep_by_addr(udev, ep), do_stall);
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USB_XFER_LOCK(xfer);
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return (err);
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}
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/*------------------------------------------------------------------------*
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* usb_handle_get_stall
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*
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* Returns:
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* 0: Success
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* Else: Failure
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*------------------------------------------------------------------------*/
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static uint8_t
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usb_handle_get_stall(struct usb_device *udev, uint8_t ea_val)
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{
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struct usb_endpoint *ep;
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uint8_t halted;
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ep = usbd_get_ep_by_addr(udev, ea_val);
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if (ep == NULL) {
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/* nothing to do */
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return (0);
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}
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USB_BUS_LOCK(udev->bus);
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halted = ep->is_stalled;
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USB_BUS_UNLOCK(udev->bus);
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return (halted);
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}
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/*------------------------------------------------------------------------*
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* usb_handle_remote_wakeup
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*
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* Returns:
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* 0: Success
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* Else: Failure
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*------------------------------------------------------------------------*/
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static usb_error_t
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usb_handle_remote_wakeup(struct usb_xfer *xfer, uint8_t is_on)
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{
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struct usb_device *udev;
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struct usb_bus *bus;
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udev = xfer->xroot->udev;
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bus = udev->bus;
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USB_BUS_LOCK(bus);
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if (is_on) {
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udev->flags.remote_wakeup = 1;
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} else {
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udev->flags.remote_wakeup = 0;
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}
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USB_BUS_UNLOCK(bus);
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#if USB_HAVE_POWERD
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/* In case we are out of sync, update the power state. */
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usb_bus_power_update(udev->bus);
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#endif
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return (0); /* success */
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}
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/*------------------------------------------------------------------------*
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* usb_handle_request
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*
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* Internal state sequence:
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*
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* USB_HR_NOT_COMPLETE -> USB_HR_COMPLETE_OK v USB_HR_COMPLETE_ERR
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*
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* Returns:
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* 0: Ready to start hardware
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* Else: Stall current transfer, if any
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*------------------------------------------------------------------------*/
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static usb_error_t
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usb_handle_request(struct usb_xfer *xfer)
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{
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struct usb_device_request req;
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struct usb_device *udev;
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const void *src_zcopy; /* zero-copy source pointer */
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const void *src_mcopy; /* non zero-copy source pointer */
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uint16_t off; /* data offset */
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uint16_t rem; /* data remainder */
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uint16_t max_len; /* max fragment length */
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uint16_t wValue;
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uint8_t state;
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uint8_t is_complete = 1;
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usb_error_t err;
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union {
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uWord wStatus;
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uint8_t buf[2];
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} temp;
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/*
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* Filter the USB transfer state into
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* something which we understand:
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*/
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switch (USB_GET_STATE(xfer)) {
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case USB_ST_SETUP:
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state = USB_HR_NOT_COMPLETE;
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if (!xfer->flags_int.control_act) {
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/* nothing to do */
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goto tr_stalled;
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}
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break;
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case USB_ST_TRANSFERRED:
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if (!xfer->flags_int.control_act) {
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state = USB_HR_COMPLETE_OK;
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} else {
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state = USB_HR_NOT_COMPLETE;
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}
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break;
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default:
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state = USB_HR_COMPLETE_ERR;
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break;
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}
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/* reset frame stuff */
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usbd_xfer_set_frame_len(xfer, 0, 0);
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usbd_xfer_set_frame_offset(xfer, 0, 0);
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usbd_xfer_set_frame_offset(xfer, sizeof(req), 1);
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/* get the current request, if any */
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usbd_copy_out(xfer->frbuffers, 0, &req, sizeof(req));
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if (xfer->flags_int.control_rem == 0xFFFF) {
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/* first time - not initialised */
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rem = UGETW(req.wLength);
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off = 0;
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} else {
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/* not first time - initialised */
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rem = xfer->flags_int.control_rem;
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off = UGETW(req.wLength) - rem;
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}
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/* set some defaults */
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max_len = 0;
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src_zcopy = NULL;
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src_mcopy = NULL;
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udev = xfer->xroot->udev;
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/* get some request fields decoded */
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wValue = UGETW(req.wValue);
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|
|
DPRINTF("req 0x%02x 0x%02x 0x%04x 0x%04x "
|
|
"off=0x%x rem=0x%x, state=%d\n", req.bmRequestType,
|
|
req.bRequest, wValue, UGETW(req.wIndex), off, rem, state);
|
|
|
|
/* demultiplex the control request */
|
|
|
|
switch (req.bmRequestType) {
|
|
case UT_READ_DEVICE:
|
|
if (state != USB_HR_NOT_COMPLETE) {
|
|
break;
|
|
}
|
|
switch (req.bRequest) {
|
|
case UR_GET_DESCRIPTOR:
|
|
goto tr_handle_get_descriptor;
|
|
case UR_GET_CONFIG:
|
|
goto tr_handle_get_config;
|
|
case UR_GET_STATUS:
|
|
goto tr_handle_get_status;
|
|
default:
|
|
goto tr_stalled;
|
|
}
|
|
break;
|
|
|
|
case UT_WRITE_DEVICE:
|
|
switch (req.bRequest) {
|
|
case UR_SET_ADDRESS:
|
|
goto tr_handle_set_address;
|
|
case UR_SET_CONFIG:
|
|
goto tr_handle_set_config;
|
|
case UR_CLEAR_FEATURE:
|
|
switch (wValue) {
|
|
case UF_DEVICE_REMOTE_WAKEUP:
|
|
goto tr_handle_clear_wakeup;
|
|
default:
|
|
goto tr_stalled;
|
|
}
|
|
break;
|
|
case UR_SET_FEATURE:
|
|
switch (wValue) {
|
|
case UF_DEVICE_REMOTE_WAKEUP:
|
|
goto tr_handle_set_wakeup;
|
|
default:
|
|
goto tr_stalled;
|
|
}
|
|
break;
|
|
default:
|
|
goto tr_stalled;
|
|
}
|
|
break;
|
|
|
|
case UT_WRITE_ENDPOINT:
|
|
switch (req.bRequest) {
|
|
case UR_CLEAR_FEATURE:
|
|
switch (wValue) {
|
|
case UF_ENDPOINT_HALT:
|
|
goto tr_handle_clear_halt;
|
|
default:
|
|
goto tr_stalled;
|
|
}
|
|
break;
|
|
case UR_SET_FEATURE:
|
|
switch (wValue) {
|
|
case UF_ENDPOINT_HALT:
|
|
goto tr_handle_set_halt;
|
|
default:
|
|
goto tr_stalled;
|
|
}
|
|
break;
|
|
default:
|
|
goto tr_stalled;
|
|
}
|
|
break;
|
|
|
|
case UT_READ_ENDPOINT:
|
|
switch (req.bRequest) {
|
|
case UR_GET_STATUS:
|
|
goto tr_handle_get_ep_status;
|
|
default:
|
|
goto tr_stalled;
|
|
}
|
|
break;
|
|
default:
|
|
/* we use "USB_ADD_BYTES" to de-const the src_zcopy */
|
|
err = usb_handle_iface_request(xfer,
|
|
USB_ADD_BYTES(&src_zcopy, 0),
|
|
&max_len, req, off, state);
|
|
if (err == 0) {
|
|
is_complete = 0;
|
|
goto tr_valid;
|
|
} else if (err == USB_ERR_SHORT_XFER) {
|
|
goto tr_valid;
|
|
}
|
|
/*
|
|
* Reset zero-copy pointer and max length
|
|
* variable in case they were unintentionally
|
|
* set:
|
|
*/
|
|
src_zcopy = NULL;
|
|
max_len = 0;
|
|
|
|
/*
|
|
* Check if we have a vendor specific
|
|
* descriptor:
|
|
*/
|
|
goto tr_handle_get_descriptor;
|
|
}
|
|
goto tr_valid;
|
|
|
|
tr_handle_get_descriptor:
|
|
err = (usb_temp_get_desc_p) (udev, &req, &src_zcopy, &max_len);
|
|
if (err)
|
|
goto tr_stalled;
|
|
if (src_zcopy == NULL)
|
|
goto tr_stalled;
|
|
goto tr_valid;
|
|
|
|
tr_handle_get_config:
|
|
temp.buf[0] = udev->curr_config_no;
|
|
src_mcopy = temp.buf;
|
|
max_len = 1;
|
|
goto tr_valid;
|
|
|
|
tr_handle_get_status:
|
|
|
|
wValue = 0;
|
|
|
|
USB_BUS_LOCK(udev->bus);
|
|
if (udev->flags.remote_wakeup) {
|
|
wValue |= UDS_REMOTE_WAKEUP;
|
|
}
|
|
if (udev->flags.self_powered) {
|
|
wValue |= UDS_SELF_POWERED;
|
|
}
|
|
USB_BUS_UNLOCK(udev->bus);
|
|
|
|
USETW(temp.wStatus, wValue);
|
|
src_mcopy = temp.wStatus;
|
|
max_len = sizeof(temp.wStatus);
|
|
goto tr_valid;
|
|
|
|
tr_handle_set_address:
|
|
if (state == USB_HR_NOT_COMPLETE) {
|
|
if (wValue >= 0x80) {
|
|
/* invalid value */
|
|
goto tr_stalled;
|
|
} else if (udev->curr_config_no != 0) {
|
|
/* we are configured ! */
|
|
goto tr_stalled;
|
|
}
|
|
} else if (state != USB_HR_NOT_COMPLETE) {
|
|
udev->address = (wValue & 0x7F);
|
|
goto tr_bad_context;
|
|
}
|
|
goto tr_valid;
|
|
|
|
tr_handle_set_config:
|
|
if (state == USB_HR_NOT_COMPLETE) {
|
|
if (usb_handle_set_config(xfer, req.wValue[0])) {
|
|
goto tr_stalled;
|
|
}
|
|
}
|
|
goto tr_valid;
|
|
|
|
tr_handle_clear_halt:
|
|
if (state == USB_HR_NOT_COMPLETE) {
|
|
if (usb_handle_set_stall(xfer, req.wIndex[0], 0)) {
|
|
goto tr_stalled;
|
|
}
|
|
}
|
|
goto tr_valid;
|
|
|
|
tr_handle_clear_wakeup:
|
|
if (state == USB_HR_NOT_COMPLETE) {
|
|
if (usb_handle_remote_wakeup(xfer, 0)) {
|
|
goto tr_stalled;
|
|
}
|
|
}
|
|
goto tr_valid;
|
|
|
|
tr_handle_set_halt:
|
|
if (state == USB_HR_NOT_COMPLETE) {
|
|
if (usb_handle_set_stall(xfer, req.wIndex[0], 1)) {
|
|
goto tr_stalled;
|
|
}
|
|
}
|
|
goto tr_valid;
|
|
|
|
tr_handle_set_wakeup:
|
|
if (state == USB_HR_NOT_COMPLETE) {
|
|
if (usb_handle_remote_wakeup(xfer, 1)) {
|
|
goto tr_stalled;
|
|
}
|
|
}
|
|
goto tr_valid;
|
|
|
|
tr_handle_get_ep_status:
|
|
if (state == USB_HR_NOT_COMPLETE) {
|
|
temp.wStatus[0] =
|
|
usb_handle_get_stall(udev, req.wIndex[0]);
|
|
temp.wStatus[1] = 0;
|
|
src_mcopy = temp.wStatus;
|
|
max_len = sizeof(temp.wStatus);
|
|
}
|
|
goto tr_valid;
|
|
|
|
tr_valid:
|
|
if (state != USB_HR_NOT_COMPLETE) {
|
|
goto tr_stalled;
|
|
}
|
|
/* subtract offset from length */
|
|
|
|
max_len -= off;
|
|
|
|
/* Compute the real maximum data length */
|
|
|
|
if (max_len > xfer->max_data_length) {
|
|
max_len = usbd_xfer_max_len(xfer);
|
|
}
|
|
if (max_len > rem) {
|
|
max_len = rem;
|
|
}
|
|
/*
|
|
* If the remainder is greater than the maximum data length,
|
|
* we need to truncate the value for the sake of the
|
|
* comparison below:
|
|
*/
|
|
if (rem > xfer->max_data_length) {
|
|
rem = usbd_xfer_max_len(xfer);
|
|
}
|
|
if ((rem != max_len) && (is_complete != 0)) {
|
|
/*
|
|
* If we don't transfer the data we can transfer, then
|
|
* the transfer is short !
|
|
*/
|
|
xfer->flags.force_short_xfer = 1;
|
|
xfer->nframes = 2;
|
|
} else {
|
|
/*
|
|
* Default case
|
|
*/
|
|
xfer->flags.force_short_xfer = 0;
|
|
xfer->nframes = max_len ? 2 : 1;
|
|
}
|
|
if (max_len > 0) {
|
|
if (src_mcopy) {
|
|
src_mcopy = USB_ADD_BYTES(src_mcopy, off);
|
|
usbd_copy_in(xfer->frbuffers + 1, 0,
|
|
src_mcopy, max_len);
|
|
usbd_xfer_set_frame_len(xfer, 1, max_len);
|
|
} else {
|
|
usbd_xfer_set_frame_data(xfer, 1,
|
|
USB_ADD_BYTES(src_zcopy, off), max_len);
|
|
}
|
|
} else {
|
|
/* the end is reached, send status */
|
|
xfer->flags.manual_status = 0;
|
|
usbd_xfer_set_frame_len(xfer, 1, 0);
|
|
}
|
|
DPRINTF("success\n");
|
|
return (0); /* success */
|
|
|
|
tr_stalled:
|
|
DPRINTF("%s\n", (state != USB_HR_NOT_COMPLETE) ?
|
|
"complete" : "stalled");
|
|
return (USB_ERR_STALLED);
|
|
|
|
tr_bad_context:
|
|
DPRINTF("bad context\n");
|
|
return (USB_ERR_BAD_CONTEXT);
|
|
}
|