spi-topcliff-pch: add recovery processing in case wait-event timeout
[zen-stable.git] / arch / mips / include / asm / mach-lantiq / xway / xway_dma.h
blob872943a4b90ef2845c1d28dcc524972a8bd7ee7f
1 /*
2 * This program is free software; you can redistribute it and/or modify it
3 * under the terms of the GNU General Public License version 2 as published
4 * by the Free Software Foundation.
6 * This program is distributed in the hope that it will be useful,
7 * but WITHOUT ANY WARRANTY; without even the implied warranty of
8 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
9 * GNU General Public License for more details.
11 * You should have received a copy of the GNU General Public License
12 * along with this program; if not, write to the Free Software
13 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
15 * Copyright (C) 2011 John Crispin <blogic@openwrt.org>
18 #ifndef LTQ_DMA_H__
19 #define LTQ_DMA_H__
21 #define LTQ_DESC_SIZE 0x08 /* each descriptor is 64bit */
22 #define LTQ_DESC_NUM 0x40 /* 64 descriptors / channel */
24 #define LTQ_DMA_OWN BIT(31) /* owner bit */
25 #define LTQ_DMA_C BIT(30) /* complete bit */
26 #define LTQ_DMA_SOP BIT(29) /* start of packet */
27 #define LTQ_DMA_EOP BIT(28) /* end of packet */
28 #define LTQ_DMA_TX_OFFSET(x) ((x & 0x1f) << 23) /* data bytes offset */
29 #define LTQ_DMA_RX_OFFSET(x) ((x & 0x7) << 23) /* data bytes offset */
30 #define LTQ_DMA_SIZE_MASK (0xffff) /* the size field is 16 bit */
32 struct ltq_dma_desc {
33 u32 ctl;
34 u32 addr;
37 struct ltq_dma_channel {
38 int nr; /* the channel number */
39 int irq; /* the mapped irq */
40 int desc; /* the current descriptor */
41 struct ltq_dma_desc *desc_base; /* the descriptor base */
42 int phys; /* physical addr */
45 enum {
46 DMA_PORT_ETOP = 0,
47 DMA_PORT_DEU,
50 extern void ltq_dma_enable_irq(struct ltq_dma_channel *ch);
51 extern void ltq_dma_disable_irq(struct ltq_dma_channel *ch);
52 extern void ltq_dma_ack_irq(struct ltq_dma_channel *ch);
53 extern void ltq_dma_open(struct ltq_dma_channel *ch);
54 extern void ltq_dma_close(struct ltq_dma_channel *ch);
55 extern void ltq_dma_alloc_tx(struct ltq_dma_channel *ch);
56 extern void ltq_dma_alloc_rx(struct ltq_dma_channel *ch);
57 extern void ltq_dma_free(struct ltq_dma_channel *ch);
58 extern void ltq_dma_init_port(int p);
60 #endif