1/*
2 * Copyright (c) 2013 Daisuke Aoyama <aoyama@peach.ne.jp>
3 * Copyright (c) 2013 Oleksandr Tymoshenko <gonzo@bluezbox.com>
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 *
26 * $FreeBSD: stable/10/sys/arm/broadcom/bcm2835/bcm2835_dma.h 322724 2017-08-20 16:52:27Z marius $
27 */
28
29#ifndef	_BCM2835_DMA_H_
30#define	_BCM2835_DMA_H_
31
32#define	BCM_DMA_BLOCK_SIZE	512
33
34/* DMA0-DMA15 but DMA15 is special */
35#define	BCM_DMA_CH_MAX		12
36
37/* request CH for any nubmer */
38#define	BCM_DMA_CH_INVALID	(-1)
39#define	BCM_DMA_CH_ANY		(-1)
40
41/* Peripheral DREQ Signals (4.2.1.3) */
42#define	BCM_DMA_DREQ_NONE	0
43#define	BCM_DMA_DREQ_EMMC	11
44#define	BCM_DMA_DREQ_SDHOST	13
45
46#define	BCM_DMA_SAME_ADDR	0
47#define	BCM_DMA_INC_ADDR	1
48
49#define	BCM_DMA_32BIT		0
50#define	BCM_DMA_128BIT		1
51
52int bcm_dma_allocate(int req_ch);
53int bcm_dma_free(int ch);
54int bcm_dma_setup_intr(int ch, void (*func)(int, void *), void *arg);
55int bcm_dma_setup_src(int ch, int dreq, int inc_addr, int width);
56int bcm_dma_setup_dst(int ch, int dreq, int inc_addr, int width);
57int bcm_dma_start(int ch, vm_paddr_t src, vm_paddr_t dst, int len);
58uint32_t bcm_dma_length(int ch);
59
60#endif	/* _BCM2835_DMA_H_ */
61