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https://github.com/patjak/facetimehd.git
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48 lines
1.3 KiB
C
48 lines
1.3 KiB
C
/*
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* SPDX-License-Identifier: GPL-2.0-only
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*
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* FacetimeHD camera driver
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*
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* Copyright (C) 2015 Sven Schnelle <svens@stackframe.org>
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* 2016 Patrik Jakobsson <patrik.r.jakobsson@gmail.com>
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*
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*/
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#ifndef _FTHD_RINGBUF_H
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#define _FTHD_RINGBUF_H
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#define FTHD_RINGBUF_ENTRY_SIZE 64
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#define FTHD_ENTRY_ADDR(chan, num) \
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(chan)->offset + (num) * FTHD_RINGBUF_ENTRY_SIZE
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#define FTHD_RINGBUF_ADDRESS_FLAGS 0
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#define FTHD_RINGBUF_REQUEST_SIZE 4
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#define FTHD_RINGBUF_RESPONSE_SIZE 8
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enum ringbuf_type_t {
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RINGBUF_TYPE_H2T=0,
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RINGBUF_TYPE_T2H=1,
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RINGBUF_TYPE_UNIDIRECTIONAL,
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};
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struct fthd_ringbuf {
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void *doorbell;
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int idx;
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};
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struct fw_channel;
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struct fthd_private;
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extern void fthd_channel_ringbuf_dump(struct fthd_private *dev_priv, struct fw_channel *chan);
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extern void fthd_channel_ringbuf_init(struct fthd_private *dev_priv, struct fw_channel *chan);
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extern u32 fthd_channel_ringbuf_get_entry(struct fthd_private *, struct fw_channel *);
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extern int fthd_channel_ringbuf_send(struct fthd_private *dev_priv, struct fw_channel *chan,
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u32 data_offset, u32 request_size, u32 response_size, u32 *entry);
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extern u32 fthd_channel_ringbuf_receive(struct fthd_private *dev_priv,
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struct fw_channel *chan);
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extern int fthd_channel_wait_ready(struct fthd_private *dev_priv, struct fw_channel *chan, u32 entry, int timeout);
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#endif
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