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f721e69bc1
Remove the paragraph about writing to the Free Software Foundation's mailing address. The FSF has changed addresses in the past, and may do so again. In 2021 this is not useful, let's rather have a bit less boilerplate at the start of source files. Change-Id: Ie0a3b2273383adbb3303faffd6ff96be7f4cae99
43 lines
1.3 KiB
C
43 lines
1.3 KiB
C
/* USB buffer library
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program 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 General Public License for more details.
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*/
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#pragma once
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#include <osmocom/core/linuxlist.h>
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#include <osmocom/core/msgb.h>
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/* buffered USB endpoint (with queue of msgb) */
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struct usb_buffered_ep {
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/* endpoint number */
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uint8_t ep;
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/* OUT endpoint (1) or IN/IRQ (0)? */
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uint8_t out_from_host;
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/* currently any transfer in progress? */
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volatile uint32_t in_progress;
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/* Tx queue (IN) / Rx queue (OUT) */
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struct llist_head queue;
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/* current length of queue */
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unsigned int queue_len;
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};
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struct msgb *usb_buf_alloc(uint8_t ep);
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void usb_buf_free(struct msgb *msg);
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int usb_buf_submit(struct msgb *msg);
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struct llist_head *usb_get_queue(uint8_t ep);
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int usb_drain_queue(uint8_t ep);
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void usb_buf_init(void);
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struct usb_buffered_ep *usb_get_buf_ep(uint8_t ep);
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int usb_refill_to_host(uint8_t ep);
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int usb_refill_from_host(uint8_t ep);
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