84 lines
2.2 KiB
C
84 lines
2.2 KiB
C
/*
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* This file is part of the unicore-mx project.
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*
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* Copyright (C) 2016 Kuldeep Singh Dhaka <kuldeepdhaka9@gmail.com>
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*
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* This library is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this library. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "usbh-private.h"
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usbh_host *usbh_init(const usbh_backend *backend,
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const usbh_backend_config *config)
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{
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usbh_host *host = backend->init(config);
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unsigned i;
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host->backend = backend;
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host->connected = NULL;
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host->last_poll = 0;
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host->next_device_address = 1;
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host->next_urb_id = 1;
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for (i = 0; i < DEVICE_ARRAY_LENGTH; i++) {
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usbh_device_invalidate(&host->devices[i]);
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}
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for (i = 0; i < URB_ARRAY_LENGTH; i++) {
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usbh_urb_invalidate(&host->urbs[i]);
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}
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return host;
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}
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static void poll_urb(usbh_host *host, uint64_t now)
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{
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unsigned i;
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for (i = 0; i < URB_ARRAY_LENGTH; i++) {
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usbh_urb *urb = &host->urbs[i];
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/* check if the URB is even valid */
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if (IS_URB_INVALID(urb)) {
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continue;
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}
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/* check if the transfer has time'd out */
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if (urb->timeout_on && now >= urb->timeout_on) {
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LOGF_LN("urb %"PRIu64" time'd out", urb->id);
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usbh_urb_free(urb, USBH_ERR_TIMEOUT);
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continue;
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}
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/* get a channel from the backend for the URB */
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if (urb->backend_tag == INVALID_BACKEND_TAG) {
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LOGF_LN("try to submit urb %"PRIu64" to backend", urb->id);
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host->backend->transfer_submit(host, urb);
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continue;
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}
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}
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}
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void usbh_poll(usbh_host *host, uint32_t us)
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{
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uint64_t now = host->last_poll + us;
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host->backend->poll(host, now);
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poll_urb(host, now);
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host->last_poll = now;
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}
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void usbh_register_connected_callback(usbh_host *host,
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usbh_connected_callback connected)
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{
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host->connected = connected;
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}
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