release/src-rt-6.x.4708/linux/linux-2.6.36/arch/blackfin/mach-bf548/dma.c

   1 /*
   2  * the simple DMA Implementation for Blackfin
   3  *
   4  * Copyright 2007-2009 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 *) DMA20_NEXT_DESC_PTR,
  36         (struct dma_register *) DMA21_NEXT_DESC_PTR,
  37         (struct dma_register *) DMA22_NEXT_DESC_PTR,
  38         (struct dma_register *) DMA23_NEXT_DESC_PTR,
  39         (struct dma_register *) MDMA_D0_NEXT_DESC_PTR,
  40         (struct dma_register *) MDMA_S0_NEXT_DESC_PTR,
  41         (struct dma_register *) MDMA_D1_NEXT_DESC_PTR,
  42         (struct dma_register *) MDMA_S1_NEXT_DESC_PTR,
  43         (struct dma_register *) MDMA_D2_NEXT_DESC_PTR,
  44         (struct dma_register *) MDMA_S2_NEXT_DESC_PTR,
  45         (struct dma_register *) MDMA_D3_NEXT_DESC_PTR,
  46         (struct dma_register *) MDMA_S3_NEXT_DESC_PTR,
  47 };
  48 EXPORT_SYMBOL(dma_io_base_addr);
  49
  50 int channel2irq(unsigned int channel)
  51 {
  52         int ret_irq = -1;
  53
  54         switch (channel) {
  55         case CH_SPORT0_RX:
  56                 ret_irq = IRQ_SPORT0_RX;
  57                 break;
  58         case CH_SPORT0_TX:
  59                 ret_irq = IRQ_SPORT0_TX;
  60                 break;
  61         case CH_SPORT1_RX:
  62                 ret_irq = IRQ_SPORT1_RX;
  63                 break;
  64         case CH_SPORT1_TX:
  65                 ret_irq = IRQ_SPORT1_TX;
  66         case CH_SPI0:
  67                 ret_irq = IRQ_SPI0;
  68                 break;
  69         case CH_SPI1:
  70                 ret_irq = IRQ_SPI1;
  71                 break;
  72         case CH_UART0_RX:
  73                 ret_irq = IRQ_UART0_RX;
  74                 break;
  75         case CH_UART0_TX:
  76                 ret_irq = IRQ_UART0_TX;
  77                 break;
  78         case CH_UART1_RX:
  79                 ret_irq = IRQ_UART1_RX;
  80                 break;
  81         case CH_UART1_TX:
  82                 ret_irq = IRQ_UART1_TX;
  83                 break;
  84         case CH_EPPI0:
  85                 ret_irq = IRQ_EPPI0;
  86                 break;
  87         case CH_EPPI1:
  88                 ret_irq = IRQ_EPPI1;
  89                 break;
  90         case CH_EPPI2:
  91                 ret_irq = IRQ_EPPI2;
  92                 break;
  93         case CH_PIXC_IMAGE:
  94                 ret_irq = IRQ_PIXC_IN0;
  95                 break;
  96         case CH_PIXC_OVERLAY:
  97                 ret_irq = IRQ_PIXC_IN1;
  98                 break;
  99         case CH_PIXC_OUTPUT:
 100                 ret_irq = IRQ_PIXC_OUT;
 101                 break;
 102         case CH_SPORT2_RX:
 103                 ret_irq = IRQ_SPORT2_RX;
 104                 break;
 105         case CH_SPORT2_TX:
 106                 ret_irq = IRQ_SPORT2_TX;
 107                 break;
 108         case CH_SPORT3_RX:
 109                 ret_irq = IRQ_SPORT3_RX;
 110                 break;
 111         case CH_SPORT3_TX:
 112                 ret_irq = IRQ_SPORT3_TX;
 113                 break;
 114         case CH_SDH:
 115                 ret_irq = IRQ_SDH;
 116                 break;
 117         case CH_SPI2:
 118                 ret_irq = IRQ_SPI2;
 119                 break;
 120         case CH_MEM_STREAM0_SRC:
 121         case CH_MEM_STREAM0_DEST:
 122                 ret_irq = IRQ_MDMAS0;
 123                 break;
 124         case CH_MEM_STREAM1_SRC:
 125         case CH_MEM_STREAM1_DEST:
 126                 ret_irq = IRQ_MDMAS1;
 127                 break;
 128         case CH_MEM_STREAM2_SRC:
 129         case CH_MEM_STREAM2_DEST:
 130                 ret_irq = IRQ_MDMAS2;
 131                 break;
 132         case CH_MEM_STREAM3_SRC:
 133         case CH_MEM_STREAM3_DEST:
 134                 ret_irq = IRQ_MDMAS3;
 135                 break;
 136         }
 137         return ret_irq;
 138 }