1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
|
/* $OpenBSD: bcm2835_dmac.h,v 1.1 2020/04/21 18:56:54 tobhe Exp $ */
/*
* Copyright (c) 2020 Tobias Heider <tobhe@openbsd.org>
* Copyright (c) 2019 Neil Ashford <ashfordneil0@gmail.com>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
/*-
* Copyright (c) 2014 Jared D. McNeill <jmcneill@invisible.ca>
* All rights reserved.
*
* 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 ``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 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.
*/
#ifndef BCM2835_DMAC_H
#define BCM2835_DMAC_H
#define DMAC_CS(n) (0x00 + (0x100 * (n)))
#define DMAC_CS_RESET (1<<31)
#define DMAC_CS_ABORT (1<<30)
#define DMAC_CS_DISDEBUG (1<<29)
#define DMAC_CS_WAIT_FOR_OUTSTANDING_WRITES (1<<28)
#define DMAC_CS_PANIC_PRIORITY (((1<<24) - 1) ^ (1<<20))
#define DMAC_CS_PRIORITY (((1<<20) - 1) ^ (1<<16))
#define DMAC_CS_ERROR (1<<8)
#define DMAC_CS_WAITING_FOR_OUTSTANDING_WRITES (1<<6)
#define DMAC_CS_DREQ_STOPS_DMA (1<<5)
#define DMAC_CS_PAUSED (1<<4)
#define DMAC_CS_DREQ (1<<3)
#define DMAC_CS_INT (1<<2)
#define DMAC_CS_END (1<<1)
#define DMAC_CS_ACTIVE (1<<0)
#define DMAC_CS_INTMASK (DMAC_CS_INT|DMAC_CS_END)
#define DMAC_CONBLK_AD(n) (0x04 + (0x100 * (n)))
#define DMAC_TI(n) (0x08 + (0x100 * (n)))
#define DMAC_SOURCE_AD(n) (0x0c + (0x100 * (n)))
#define DMAC_DEST_AD(n) (0x10 + (0x100 * (n)))
#define DMAC_TXFR_LEN(n) (0x14 + (0x100 * (n)))
#define DMAC_STRIDE(n) (0x18 + (0x100 * (n)))
#define DMAC_NEXTCONBK(n) (0x1c + (0x100 * (n)))
#define DMAC_DEBUG(n) (0x20 + (0x100 * (n)))
#define DMAC_DEBUG_LITE (1<<28)
#define DMAC_DEBUG_VERSION (((1<<28) - 1) ^ (1<<25))
#define DMAC_DEBUG_DMA_STATE (((1<<25) - 1) ^ (1<<16))
#define DMAC_DEBUG_DMA_ID (((1<<16) - 1) ^ (1<<8))
#define DMAC_DEBUG_OUTSTANDING_WRITES (((1<<8) - 1) ^ (1<<4))
#define DMAC_DEBUG_READ_ERROR (1<<2)
#define DMAC_DEBUG_FIFO_ERROR (1<<1)
#define DMAC_DEBUG_READ_LAST_NOT_SET_ERROR (1<<0)
struct bcmdmac_conblk {
uint32_t cb_ti;
#define DMAC_TI_NO_WIDE_BURSTS (1 << 26)
#define DMAC_TI_WAITS (((1 << 26) - 1) ^ (1 << 21))
#define DMAC_TI_PERMAP (((1 << 21) - 1) ^ (1 << 16))
#define DMAC_TI_PERMAP_BASE (1 << 16)
#define DMAC_TI_BURST_LENGTH (((1 << 16) - 1) ^ (1 << 12))
#define DMAC_TI_SRC_IGNORE (1 << 11)
#define DMAC_TI_SRC_DREQ (1 << 10)
#define DMAC_TI_SRC_WIDTH (1 << 9)
#define DMAC_TI_SRC_INC (1 << 8)
#define DMAC_TI_DEST_IGNORE (1 << 7)
#define DMAC_TI_DEST_DREQ (1 << 6)
#define DMAC_TI_DEST_WIDTH (1 << 5)
#define DMAC_TI_DEST_INC (1 << 4)
#define DMAC_TI_WAIT_RESP (1 << 3)
#define DMAC_TI_TDMODE (1 << 1)
#define DMAC_TI_INTEN (1 << 0)
uint32_t cb_source_ad;
uint32_t cb_dest_ad;
uint32_t cb_txfr_len;
#define DMAC_TXFR_LEN_YLENGTH (((1 << 30) - 1) ^ (1 << 16))
#define DMAC_TXFR_LEN_XLENGTH (((1 << 16) - 1) ^ (1 << 0))
uint32_t cb_stride;
#define DMAC_STRIDE_D_STRIDE (((1 << 32) - 1) ^ (1 << 16))
#define DMAC_STRIDE_S_STRIDE (((1 << 16) - 1) ^ (1 << 0))
uint32_t cb_nextconbk;
uint32_t cb_padding[2];
} __packed;
#define DMAC_INT_STATUS 0xfe0
#define DMAC_ENABLE 0xff0
enum bcmdmac_type { BCMDMAC_TYPE_NORMAL, BCMDMAC_TYPE_LITE };
struct bcmdmac_channel;
struct bcmdmac_channel *bcmdmac_alloc(enum bcmdmac_type, int,
void (*)(uint32_t, uint32_t, void *), void *);
void bcmdmac_free(struct bcmdmac_channel *);
void bcmdmac_set_conblk_addr(struct bcmdmac_channel *, bus_addr_t);
int bcmdmac_transfer(struct bcmdmac_channel *);
void bcmdmac_halt(struct bcmdmac_channel *);
#endif /* BCM2835_DMAC_H */
|
