Commit | Line | Data |
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45051539 | 1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
dfec1a82 | 2 | /* |
dfec1a82 | 3 | * |
97b92108 | 4 | * Copyright (C) 2011 John Crispin <john@phrozen.org> |
dfec1a82 JC |
5 | */ |
6 | ||
7 | #ifndef LTQ_DMA_H__ | |
8 | #define LTQ_DMA_H__ | |
9 | ||
10 | #define LTQ_DESC_SIZE 0x08 /* each descriptor is 64bit */ | |
5112e923 | 11 | #define LTQ_DESC_NUM 0xC0 /* 192 descriptors / channel */ |
dfec1a82 | 12 | |
70342287 | 13 | #define LTQ_DMA_OWN BIT(31) /* owner bit */ |
dfec1a82 JC |
14 | #define LTQ_DMA_C BIT(30) /* complete bit */ |
15 | #define LTQ_DMA_SOP BIT(29) /* start of packet */ | |
16 | #define LTQ_DMA_EOP BIT(28) /* end of packet */ | |
17 | #define LTQ_DMA_TX_OFFSET(x) ((x & 0x1f) << 23) /* data bytes offset */ | |
18 | #define LTQ_DMA_RX_OFFSET(x) ((x & 0x7) << 23) /* data bytes offset */ | |
19 | #define LTQ_DMA_SIZE_MASK (0xffff) /* the size field is 16 bit */ | |
20 | ||
21 | struct ltq_dma_desc { | |
22 | u32 ctl; | |
23 | u32 addr; | |
24 | }; | |
25 | ||
26 | struct ltq_dma_channel { | |
27 | int nr; /* the channel number */ | |
28 | int irq; /* the mapped irq */ | |
29 | int desc; /* the current descriptor */ | |
70342287 | 30 | struct ltq_dma_desc *desc_base; /* the descriptor base */ |
dfec1a82 | 31 | int phys; /* physical addr */ |
2d946e5b | 32 | struct device *dev; |
dfec1a82 JC |
33 | }; |
34 | ||
35 | enum { | |
36 | DMA_PORT_ETOP = 0, | |
37 | DMA_PORT_DEU, | |
38 | }; | |
39 | ||
40 | extern void ltq_dma_enable_irq(struct ltq_dma_channel *ch); | |
41 | extern void ltq_dma_disable_irq(struct ltq_dma_channel *ch); | |
42 | extern void ltq_dma_ack_irq(struct ltq_dma_channel *ch); | |
43 | extern void ltq_dma_open(struct ltq_dma_channel *ch); | |
44 | extern void ltq_dma_close(struct ltq_dma_channel *ch); | |
45 | extern void ltq_dma_alloc_tx(struct ltq_dma_channel *ch); | |
46 | extern void ltq_dma_alloc_rx(struct ltq_dma_channel *ch); | |
47 | extern void ltq_dma_free(struct ltq_dma_channel *ch); | |
49293bbc | 48 | extern void ltq_dma_init_port(int p, int tx_burst, int rx_burst); |
dfec1a82 JC |
49 | |
50 | #endif |