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
|
/*
* Copyright (c) 2006-2010 Trusted Logic S.A.
* All Rights Reserved.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 as published by
* the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along with
* this program; if not, write to the Free Software Foundation, Inc., 59 Temple
* Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "scxlnx_defs.h"
#include "scxlnx_util.h"
#include "scx_public_dma.h"
#include <asm/atomic.h>
static atomic_t g_dmaEventFlag = ATOMIC_INIT(0);
/*------------------------------------------------------------------------ */
/*
* Internal functions
*/
static void scxPublicDMACallback(int lch, u16 ch_status, void *data)
{
atomic_inc(&g_dmaEventFlag);
}
/*------------------------------------------------------------------------ */
/*
* Public DMA API
*/
u32 scxPublicDMARequest(int *lch)
{
int dma_ch_out = 0;
if (lch == NULL)
return PUBLIC_CRYPTO_ERR_BAD_PARAMETERS;
if (omap_request_dma(0, "SMC Public Crypto",
scxPublicDMACallback, NULL, &dma_ch_out) != 0)
return PUBLIC_CRYPTO_ERR_OUT_OF_MEMORY;
omap_disable_dma_irq(dma_ch_out, OMAP_DMA_DROP_IRQ |
OMAP_DMA_BLOCK_IRQ);
*lch = dma_ch_out;
return PUBLIC_CRYPTO_OPERATION_SUCCESS;
}
/*------------------------------------------------------------------------ */
/*
* Release a DMA channel
*/
u32 scxPublicDMARelease(int lch)
{
omap_free_dma(lch);
return PUBLIC_CRYPTO_OPERATION_SUCCESS;
}
/*------------------------------------------------------------------------ */
void scxPublicDMASetParams(int lch, struct omap_dma_channel_params *pParams)
{
omap_set_dma_params(lch, pParams);
}
/*------------------------------------------------------------------------ */
void scxPublicDMAStart(int lch, int interruptMask)
{
atomic_set(&g_dmaEventFlag, 0);
omap_enable_dma_irq(lch, interruptMask);
omap_start_dma(lch);
}
/*------------------------------------------------------------------------ */
void scxPublicDMADisableChannel(int lch)
{
omap_stop_dma(lch);
}
/*------------------------------------------------------------------------ */
void scxPublicDMAClearChannel(int lch)
{
omap_clear_dma(lch);
}
/*------------------------------------------------------------------------ */
void scxPublicDMAWait(int nr_of_cb)
{
while (atomic_read(&g_dmaEventFlag) < nr_of_cb)
cpu_relax();
}
/*------------------------------------------------------------------------ */
/*
* Perform common DMA channel setup, used to factorize the code
*
* Output: struct omap_dma_channel_params *pDMAChannel
* Inputs: u32 nbBlocks Number of block of the transfer
* u32 nbElements Number of elements of the transfer
* u32 nDstStart Destination address
* u32 nSrcStart Source address
* u32 nTriggerID Trigger ID
*/
void scxPublicSetDMAChannelCommonParams(
struct omap_dma_channel_params *pDMAChannel,
u32 nbBlocks, u32 nbElements,
u32 nDstStart, u32 nSrcStart, u32 nTriggerID)
{
pDMAChannel->data_type = OMAP_DMA_DATA_TYPE_S32;
pDMAChannel->elem_count = nbElements;
pDMAChannel->frame_count = nbBlocks;
pDMAChannel->src_ei = 0;
pDMAChannel->src_fi = 0;
pDMAChannel->dst_ei = 0;
pDMAChannel->dst_fi = 0;
pDMAChannel->sync_mode = OMAP_DMA_SYNC_FRAME;
pDMAChannel->src_start = nSrcStart;
pDMAChannel->dst_start = nDstStart;
pDMAChannel->trigger = nTriggerID;
}
|
