blob: 35c5be826d6e143bce514414c401d1d32c269323 (
plain)
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
|
/* Driver for Calypso DMA controller */
/* (C) 2010 by Harald Welte <laforge@gnumonks.org>
*
* 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 as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* 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.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
*/
#include <memory.h>
#define BASE_ADDR_DMA 0xfffffc00
enum dma_reg {
CONTROLLER_CONF = 0x00,
ALLOC_CONFIG = 0x02,
};
#define DMA_REG(m) (BASE_ADDR_DMA + (m))
#define DMA_RAD(x) DMA_REG((x)*0x10 + 0x0)
#define DMA_RDPATH(x) DMA_REG((x)*0x10 + 0x2)
#define DMA_AAD(x) DMA_REG((x)*0x10 + 0x4)
#define DMA_ALGTH(x) DMA_REG((x)*0x10 + 0x6)
#define DMA_CTRL(x) DMA_REG((x)*0x10 + 0x8)
#define DMA_CUR_OFF_API(x) DMA_REG((x)*0x10 + 0xa)
void dma_init(void)
{
/* DMA 1 (RIF Tx), 2 (RIF Rx) allocated to DSP, all others to ARM */
writew(0x000c, DMA_REG(ALLOC_CONFIG));
}
|
