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
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
|
/* $OpenBSD: dma.h,v 1.2 1997/02/16 22:31:22 pefo Exp $ */
/*
* Copyright (c) 1996 Per Fogelstrom
*
* 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed under OpenBSD by
* Per Fogelstrom.
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* 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.
*
*/
extern vm_map_t phys_map;
/*
* Structure used to control dma.
*/
typedef struct dma_softc {
struct device sc_dev; /* use as a device */
struct esp_softc *sc_esp;
int dma_ch;
vm_offset_t dma_va; /* Viritual address for transfer */
vm_offset_t req_va; /* Original request va */
int req_size; /* Request size */
int mode; /* Mode register value and direction */
int sc_active; /* Active flag */
char **sc_dmaaddr; /* Pointer to dma address in dev */
int *sc_dmalen; /* Pointer to len counter in dev */
} dma_softc_t;
#define DMA_TO_DEV 0
#define DMA_FROM_DEV 1
#define DMA_CH0 0
#define DMA_CH1 1
#define DMA_RESET(r)
#if 0
#define DMA_START(a, b, c, d) \
{ \
int dcmd; \
int xcmd; \
int pa; \
int sz; \
if((vm_offset_t)(b) < VM_MIN_KERNEL_ADDRESS) { \
pa = CACHED_TO_PHYS(b); \
} \
else { \
pa = pmap_extract(vm_map_pmap(phys_map), (vm_offset_t)(b));\
} \
sz = c; \
if(sz + (pa & (NBPG - 1)) > NBPG) { \
sz = NBPG - (pa & (NBPG - 1)); \
} \
dcmd = ((d) == DMA_FROM_DEV) ? 0x30 : 0x10; \
if((a)->dma_ch == DMA_CH0) { \
out32(R3715_DMA_ADR0, pa); \
out32(R3715_DMA_CNT0, sz - 1); \
xcmd = ~0x30; \
} \
else { \
out32(R3715_DMA_ADR1, pa); \
out32(R3715_DMA_CNT1, sz - 1); \
dcmd = dcmd << 6; \
xcmd = ~(0x30 << 6); \
} \
dcmd |= (1 << 26); \
out32(R3715_IO_TIMING, (in32(R3715_IO_TIMING) & xcmd) | dcmd);\
}
#else
#define DMA_START(a, b, c, d) \
{ \
int dcmd; \
int xcmd; \
int pa; \
int sz; \
pa = CACHED_TO_PHYS(dma_buffer); \
(a)->req_va = (vm_offset_t)(b); \
(a)->req_size = c; \
(a)->mode = d; \
sz = c; \
if((d) == DMA_TO_DEV) { \
int *_p = (int *)PHYS_TO_UNCACHED(pa); \
int *_v = (int *)b; \
int _n = sz; \
while(_n > 0) { \
*_p = htonl(*_v); \
_p++; _v++; _n -= 4; \
} \
} \
dcmd = ((d) == DMA_FROM_DEV) ? 0x30 : 0x10; \
if((a)->dma_ch == DMA_CH0) { \
out32(R3715_DMA_ADR0, pa); \
out32(R3715_DMA_CNT0, sz - 1); \
xcmd = ~0x30; \
} \
else { \
out32(R3715_DMA_ADR1, pa); \
out32(R3715_DMA_CNT1, sz - 1); \
dcmd = dcmd << 6; \
xcmd = ~(0x30 << 6); \
} \
dcmd |= (1 << 26); \
/* Switch direction before enable */ \
out32(R3715_IO_TIMING, (in32(R3715_IO_TIMING) & xcmd) | \
(dcmd & ~0x410)); \
(void)in16(RISC_STATUS); \
out32(R3715_IO_TIMING, (in32(R3715_IO_TIMING) & xcmd) | dcmd);\
}
#endif
#define DMA_MAP(a, b, c, d)
#define DMA_INTR(r)
#define DMA_DRAIN(r)
#define DMA_END(c) \
{ \
int resudial; \
if((c)->dma_ch == DMA_CH0) { \
out32(R3715_IO_TIMING, in32(R3715_IO_TIMING) & ~0x10); \
resudial = in32(R3715_DMA_CNT0); \
if(resudial) \
printf("res: %d\n", resudial); \
} \
else { \
out32(R3715_IO_TIMING, in32(R3715_IO_TIMING) & ~0x400); \
resudial = in32(R3715_DMA_CNT1); \
} \
if((c)->mode == DMA_FROM_DEV) { \
int *_v = (int *)(c)->req_va; \
int *_p = (int *)PHYS_TO_UNCACHED(CACHED_TO_PHYS(dma_buffer)); \
int _n = (c)->req_size; \
while(_n > 0) { \
*_v = htonl(*_p); \
_p++; _v++; _n -= 4; \
} \
} \
}
|
