blob: 872943a4b90ef2845c1d28dcc524972a8bd7ee7f (
plain) (
blame)
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
|
/*
* 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.
*
* Copyright (C) 2011 John Crispin <blogic@openwrt.org>
*/
#ifndef LTQ_DMA_H__
#define LTQ_DMA_H__
#define LTQ_DESC_SIZE 0x08 /* each descriptor is 64bit */
#define LTQ_DESC_NUM 0x40 /* 64 descriptors / channel */
#define LTQ_DMA_OWN BIT(31) /* owner bit */
#define LTQ_DMA_C BIT(30) /* complete bit */
#define LTQ_DMA_SOP BIT(29) /* start of packet */
#define LTQ_DMA_EOP BIT(28) /* end of packet */
#define LTQ_DMA_TX_OFFSET(x) ((x & 0x1f) << 23) /* data bytes offset */
#define LTQ_DMA_RX_OFFSET(x) ((x & 0x7) << 23) /* data bytes offset */
#define LTQ_DMA_SIZE_MASK (0xffff) /* the size field is 16 bit */
struct ltq_dma_desc {
u32 ctl;
u32 addr;
};
struct ltq_dma_channel {
int nr; /* the channel number */
int irq; /* the mapped irq */
int desc; /* the current descriptor */
struct ltq_dma_desc *desc_base; /* the descriptor base */
int phys; /* physical addr */
};
enum {
DMA_PORT_ETOP = 0,
DMA_PORT_DEU,
};
extern void ltq_dma_enable_irq(struct ltq_dma_channel *ch);
extern void ltq_dma_disable_irq(struct ltq_dma_channel *ch);
extern void ltq_dma_ack_irq(struct ltq_dma_channel *ch);
extern void ltq_dma_open(struct ltq_dma_channel *ch);
extern void ltq_dma_close(struct ltq_dma_channel *ch);
extern void ltq_dma_alloc_tx(struct ltq_dma_channel *ch);
extern void ltq_dma_alloc_rx(struct ltq_dma_channel *ch);
extern void ltq_dma_free(struct ltq_dma_channel *ch);
extern void ltq_dma_init_port(int p);
#endif
|
