release/src-rt-6.x.4708/linux/linux-2.6.36/arch/blackfin/mach-bf538/dma.c

   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 *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 *) MDMA0_D0_NEXT_DESC_PTR,
  36         (struct dma_register *) MDMA0_S0_NEXT_DESC_PTR,
  37         (struct dma_register *) MDMA0_D1_NEXT_DESC_PTR,
  38         (struct dma_register *) MDMA0_S1_NEXT_DESC_PTR,
  39         (struct dma_register *) MDMA1_D0_NEXT_DESC_PTR,
  40         (struct dma_register *) MDMA1_S0_NEXT_DESC_PTR,
  41         (struct dma_register *) MDMA1_D1_NEXT_DESC_PTR,
  42         (struct dma_register *) MDMA1_S1_NEXT_DESC_PTR,
  43 };
  44 EXPORT_SYMBOL(dma_io_base_addr);
  45
  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 }