1 /*
2 * the simple DMA Implementation for Blackfin
3 *
4 * Copyright 2008 Analog Devices Inc.
5 *
6 * Licensed under the GPL-2 or later.
7 */
8
9 #include <linux/module.h>
10
11 #include <asm/blackfin.h>
12 #include <asm/dma.h>
13
14 struct dma_register * const 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 *) DMA12_NEXT_DESC_PTR,
28 (struct dma_register *) DMA13_NEXT_DESC_PTR,
29 (struct dma_register *) DMA14_NEXT_DESC_PTR,
30 (struct dma_register *) DMA15_NEXT_DESC_PTR,
31 (struct dma_register *) DMA16_NEXT_DESC_PTR,
32 (struct dma_register *) DMA17_NEXT_DESC_PTR,
33 (struct dma_register *) DMA18_NEXT_DESC_PTR,
34 (struct dma_register *) DMA19_NEXT_DESC_PTR,
35 (struct dma_register *) MDMA_D0_NEXT_DESC_PTR,
36 (struct dma_register *) MDMA_S0_NEXT_DESC_PTR,
37 (struct dma_register *) MDMA_D1_NEXT_DESC_PTR,
38 (struct dma_register *) MDMA_S1_NEXT_DESC_PTR,
39 (struct dma_register *) MDMA_D2_NEXT_DESC_PTR,
40 (struct dma_register *) MDMA_S2_NEXT_DESC_PTR,
41 (struct dma_register *) MDMA_D3_NEXT_DESC_PTR,
42 (struct dma_register *) MDMA_S3_NEXT_DESC_PTR,
43 };
44 EXPORT_SYMBOL(dma_io_base_addr);
45
channel2irq(unsigned int channel)46 int channel2irq(unsigned int channel)
47 {
48 int ret_irq = -1;
49
50 switch (channel) {
51 case CH_PPI:
52 ret_irq = IRQ_PPI;
53 break;
54
55 case CH_UART0_RX:
56 ret_irq = IRQ_UART0_RX;
57 break;
58
59 case CH_UART0_TX:
60 ret_irq = IRQ_UART0_TX;
61 break;
62
63 case CH_UART1_RX:
64 ret_irq = IRQ_UART1_RX;
65 break;
66
67 case CH_UART1_TX:
68 ret_irq = IRQ_UART1_TX;
69 break;
70
71 case CH_UART2_RX:
72 ret_irq = IRQ_UART2_RX;
73 break;
74
75 case CH_UART2_TX:
76 ret_irq = IRQ_UART2_TX;
77 break;
78
79 case CH_SPORT0_RX:
80 ret_irq = IRQ_SPORT0_RX;
81 break;
82
83 case CH_SPORT0_TX:
84 ret_irq = IRQ_SPORT0_TX;
85 break;
86
87 case CH_SPORT1_RX:
88 ret_irq = IRQ_SPORT1_RX;
89 break;
90
91 case CH_SPORT1_TX:
92 ret_irq = IRQ_SPORT1_TX;
93 break;
94
95 case CH_SPORT2_RX:
96 ret_irq = IRQ_SPORT2_RX;
97 break;
98
99 case CH_SPORT2_TX:
100 ret_irq = IRQ_SPORT2_TX;
101 break;
102
103 case CH_SPORT3_RX:
104 ret_irq = IRQ_SPORT3_RX;
105 break;
106
107 case CH_SPORT3_TX:
108 ret_irq = IRQ_SPORT3_TX;
109 break;
110
111 case CH_SPI0:
112 ret_irq = IRQ_SPI0;
113 break;
114
115 case CH_SPI1:
116 ret_irq = IRQ_SPI1;
117 break;
118
119 case CH_SPI2:
120 ret_irq = IRQ_SPI2;
121 break;
122
123 case CH_MEM_STREAM0_SRC:
124 case CH_MEM_STREAM0_DEST:
125 ret_irq = IRQ_MEM0_DMA0;
126 break;
127 case CH_MEM_STREAM1_SRC:
128 case CH_MEM_STREAM1_DEST:
129 ret_irq = IRQ_MEM0_DMA1;
130 break;
131 case CH_MEM_STREAM2_SRC:
132 case CH_MEM_STREAM2_DEST:
133 ret_irq = IRQ_MEM1_DMA0;
134 break;
135 case CH_MEM_STREAM3_SRC:
136 case CH_MEM_STREAM3_DEST:
137 ret_irq = IRQ_MEM1_DMA1;
138 break;
139 }
140 return ret_irq;
141 }
142