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https://gitea.osmocom.org/sim-card/simtrace2.git
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61a01b77f6
Let's move low-level handling of endpoint queue refill from the individual apps into common/shared code. Now the main simply has to call usb_process() for every interface, and inbound messages will be dispatched to call-back functions from there. Change-Id: Ic6f9c6c1ffdbb0c9c3b284371ecc83b17e3be746
57 lines
1.9 KiB
C
57 lines
1.9 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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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA
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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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struct usb_if {
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uint8_t if_num; /* interface number */
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uint8_t ep_out; /* OUT endpoint (0 if none) */
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uint8_t ep_in; /* IN endpint (0 if none) */
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uint8_t ep_int; /* INT endpoint (0 if none) */
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void *data; /* opaque data, passed through */
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struct {
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/* call-back to be called for inclming messages on OUT EP */
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void (*rx_out)(struct msgb *msg, const struct usb_if *usb_if);
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} ops;
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};
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void usb_process(const struct usb_if *usb_if);
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