/arch/blackfin/mach-bf537/dma.c

 1/*
 2 * Copyright 2007-2009 Analog Devices Inc.
 3 *
 4 * Licensed under the GPL-2 or later.
 5 *
 6 * This file contains the simple DMA Implementation for Blackfin
 7 */
 8
 9#include <linux/module.h>
10
11#include <asm/blackfin.h>
12#include <asm/dma.h>
13
14struct dma_register *dma_io_base_addr[MAX_DMA_CHANNELS] = {
15	(struct dma_register *) DMA0_NEXT_DESC_PTR,
16	(struct dma_register *) DMA1_NEXT_DESC_PTR,
17	(struct dma_register *) DMA2_NEXT_DESC_PTR,
18	(struct dma_register *) DMA3_NEXT_DESC_PTR,
19	(struct dma_register *) DMA4_NEXT_DESC_PTR,
20	(struct dma_register *) DMA5_NEXT_DESC_PTR,
21	(struct dma_register *) DMA6_NEXT_DESC_PTR,
22	(struct dma_register *) DMA7_NEXT_DESC_PTR,
23	(struct dma_register *) DMA8_NEXT_DESC_PTR,
24	(struct dma_register *) DMA9_NEXT_DESC_PTR,
25	(struct dma_register *) DMA10_NEXT_DESC_PTR,
26	(struct dma_register *) DMA11_NEXT_DESC_PTR,
27	(struct dma_register *) MDMA_D0_NEXT_DESC_PTR,
28	(struct dma_register *) MDMA_S0_NEXT_DESC_PTR,
29	(struct dma_register *) MDMA_D1_NEXT_DESC_PTR,
30	(struct dma_register *) MDMA_S1_NEXT_DESC_PTR,
31};
32EXPORT_SYMBOL(dma_io_base_addr);
33
34int channel2irq(unsigned int channel)
35{
36	int ret_irq = -1;
37
38	switch (channel) {
39	case CH_PPI:
40		ret_irq = IRQ_PPI;
41		break;
42
43	case CH_EMAC_RX:
44		ret_irq = IRQ_MAC_RX;
45		break;
46
47	case CH_EMAC_TX:
48		ret_irq = IRQ_MAC_TX;
49		break;
50
51	case CH_UART1_RX:
52		ret_irq = IRQ_UART1_RX;
53		break;
54
55	case CH_UART1_TX:
56		ret_irq = IRQ_UART1_TX;
57		break;
58
59	case CH_SPORT0_RX:
60		ret_irq = IRQ_SPORT0_RX;
61		break;
62
63	case CH_SPORT0_TX:
64		ret_irq = IRQ_SPORT0_TX;
65		break;
66
67	case CH_SPORT1_RX:
68		ret_irq = IRQ_SPORT1_RX;
69		break;
70
71	case CH_SPORT1_TX:
72		ret_irq = IRQ_SPORT1_TX;
73		break;
74
75	case CH_SPI:
76		ret_irq = IRQ_SPI;
77		break;
78
79	case CH_UART0_RX:
80		ret_irq = IRQ_UART0_RX;
81		break;
82
83	case CH_UART0_TX:
84		ret_irq = IRQ_UART0_TX;
85		break;
86
87	case CH_MEM_STREAM0_SRC:
88	case CH_MEM_STREAM0_DEST:
89		ret_irq = IRQ_MEM_DMA0;
90		break;
91
92	case CH_MEM_STREAM1_SRC:
93	case CH_MEM_STREAM1_DEST:
94		ret_irq = IRQ_MEM_DMA1;
95		break;
96	}
97	return ret_irq;
98}