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/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (c) 2013 Daisuke Aoyama <aoyama@peach.ne.jp>
* Copyright (c) 2013 Oleksandr Tymoshenko <gonzo@bluezbox.com>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD$
*/
#ifndef _BCM2835_DMA_H_
#define _BCM2835_DMA_H_
#define BCM_DMA_BLOCK_SIZE 512
/* DMA0-DMA15 but DMA15 is special */
#define BCM_DMA_CH_MAX 12
/* request CH for any nubmer */
#define BCM_DMA_CH_INVALID (-1)
#define BCM_DMA_CH_ANY (-1)
/* Peripheral DREQ Signals (4.2.1.3) */
#define BCM_DMA_DREQ_NONE 0
/*
* XXX This doesn't seem to work for the Raspberry Pi 4, but the peripheral
* documentation still lists it at 11.
*/
#define BCM_DMA_DREQ_EMMC 11
#define BCM_DMA_DREQ_SDHOST 13
#define BCM_DMA_SAME_ADDR 0
#define BCM_DMA_INC_ADDR 1
#define BCM_DMA_32BIT 0
#define BCM_DMA_128BIT 1
int bcm_dma_allocate(int req_ch);
int bcm_dma_free(int ch);
int bcm_dma_setup_intr(int ch, void (*func)(int, void *), void *arg);
int bcm_dma_setup_src(int ch, int dreq, int inc_addr, int width);
int bcm_dma_setup_dst(int ch, int dreq, int inc_addr, int width);
int bcm_dma_start(int ch, vm_paddr_t src, vm_paddr_t dst, int len);
uint32_t bcm_dma_length(int ch);
#endif /* _BCM2835_DMA_H_ */
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