1 #-
2 # Copyright (c) 2016 Jared D. McNeill <jmcneill@invisible.ca>
3 # All rights reserved.
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 # $FreeBSD$
27 #
28
29 #include <sys/bus.h>
30
31 INTERFACE sunxi_dma;
32
33 HEADER {
34 #include <machine/bus.h>
35
36 struct sunxi_dma_config {
37 unsigned int dst_width;
38 unsigned int dst_burst_len;
39 unsigned int dst_drqtype;
40 bool dst_noincr;
41 unsigned int dst_blksize; /* DDMA-only */
42 unsigned int dst_wait_cyc; /* DDMA-only */
43 unsigned int src_width;
44 unsigned int src_burst_len;
45 unsigned int src_drqtype;
46 bool src_noincr;
47 unsigned int src_blksize; /* DDMA-only */
48 unsigned int src_wait_cyc; /* DDMA-only */
49 };
50
51 typedef void (*sunxi_dma_callback)(void *);
52 }
53
54 #
55 # Allocate DMA channel
56 #
57 METHOD void * alloc {
58 device_t dev;
59 bool dedicated;
60 sunxi_dma_callback callback;
61 void *callback_arg;
62 };
63
64 #
65 # Free DMA channel
66 #
67 METHOD void free {
68 device_t dev;
69 void *dmachan;
70 };
71
72 #
73 # Set DMA channel configuration
74 #
75 METHOD int set_config {
76 device_t dev;
77 void *dmachan;
78 const struct sunxi_dma_config *cfg;
79 };
80
81 #
82 # Start DMA channel transfer
83 #
84 METHOD int transfer {
85 device_t dev;
86 void *dmachan;
87 bus_addr_t src;
88 bus_addr_t dst;
89 size_t nbytes;
90 };
91
92 #
93 # Halt DMA channel transfer
94 #
95 METHOD void halt {
96 device_t dev;
97 void *dmachan;
98 };
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