release/src-rt-6.x.4708/linux/linux-2.6.36/arch/blackfin/mach-bf518/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 *) MDMA_S0_NEXT_DESC_PTR,
  28         (struct dma_register *) MDMA_D0_NEXT_DESC_PTR,
  29         (struct dma_register *) MDMA_S1_NEXT_DESC_PTR,
  30         (struct dma_register *) MDMA_D1_NEXT_DESC_PTR,
  31 };
  32 EXPORT_SYMBOL(dma_io_base_addr);
  33
  34 int 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_SPI0:
  76                 ret_irq = IRQ_SPI0;
  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 }