1/* $Id: imx23_apbdma.h,v 1.1 2012/11/20 19:06:12 jkunz Exp $ */
2
3/*
4 * Copyright (c) 2012 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Petri Laakso.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 *    notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 *    notice, this list of conditions and the following disclaimer in the
17 *    documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31
32#ifndef _ARM_IMX_IMX23_APBDMA_H_
33#define _ARM_IMX_IMX23_APBDMA_H_
34
35#include <sys/cdefs.h>
36
37/*
38 * Public interface to apbdma for device drivers.
39 */
40void * apbdma_dmamem_alloc(device_t, int, bus_size_t);
41
42/*
43 * Common definitions for both APBH and APBX DMA.
44 */
45#define APBH_DMA_N_CHANNELS	8
46#define APBX_DMA_N_CHANNELS	16
47
48#define CMDPIOWORDS_MAX	3
49
50/*
51 * DMA command type.
52 */
53#define NO_DMA_XFER	0
54#define DMA_WRITE	1
55#define DMA_READ	2
56#define DMA_SENSE	3
57
58/*
59 * Command word 0.
60 */
61#define NEXTCMDADDR	__BITS(31, 0)
62
63/*
64 * Command word 1.
65 */
66#define XFER_COUNT	__BITS(31, 16)
67#define CMDPIOWORDS	__BITS(15, 12)
68#define CMDWORD1_RSVD0	__BITS(11, 8)
69#define WAIT4ENDCMD	__BIT(7)
70#define SEMAPHORE	__BIT(6)
71#define NANDWAIT4READY	__BIT(5)
72#define NANDLOCK	__BIT(4)
73#define IRQONCMPLT	__BIT(3)
74#define CHAIN		__BIT(2)
75#define COMMAND		__BITS(1, 0)
76
77/*
78 * Command word 2.
79 */
80#define BUF_ADDR	__BITS(31, 0)
81
82/*
83 * Command word 3-n.
84 */
85#define PIOWORD		__BITS(31, 0)
86
87#endif /* !_ARM_IMX_IMX23_APBDMA_H_ */
88