arch/blackfin/mach-bf561/dma.c

   1 /*
   2  * File:         arch/blackfin/mach-bf561/dma.c
   3  * Based on:
   4  * Author:
   5  *
   6  * Created:
   7  * Description:  This file contains the simple DMA Implementation for Blackfin
   8  *
   9  * Modified:
  10  *               Copyright 2004-2007 Analog Devices Inc.
  11  *
  12  * Bugs:         Enter bugs at http://blackfin.uclinux.org/
  13  *
  14  * This program is free software; you can redistribute it and/or modify
  15  * it under the terms of the GNU General Public License as published by
  16  * the Free Software Foundation; either version 2 of the License, or
  17  * (at your option) any later version.
  18  *
  19  * This program is distributed in the hope that it will be useful,
  20  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  21  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  22  * GNU General Public License for more details.
  23  *
  24  * You should have received a copy of the GNU General Public License
  25  * along with this program; if not, see the file COPYING, or write
  26  * to the Free Software Foundation, Inc.,
  27  * 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  28  */
  29 #include <linux/module.h>
  30
  31 #include <asm/blackfin.h>
  32 #include <asm/dma.h>
  33
  34 struct dma_register *dma_io_base_addr[MAX_BLACKFIN_DMA_CHANNEL] = {
  35         (struct dma_register *) DMA1_0_NEXT_DESC_PTR,
  36         (struct dma_register *) DMA1_1_NEXT_DESC_PTR,
  37         (struct dma_register *) DMA1_2_NEXT_DESC_PTR,
  38         (struct dma_register *) DMA1_3_NEXT_DESC_PTR,
  39         (struct dma_register *) DMA1_4_NEXT_DESC_PTR,
  40         (struct dma_register *) DMA1_5_NEXT_DESC_PTR,
  41         (struct dma_register *) DMA1_6_NEXT_DESC_PTR,
  42         (struct dma_register *) DMA1_7_NEXT_DESC_PTR,
  43         (struct dma_register *) DMA1_8_NEXT_DESC_PTR,
  44         (struct dma_register *) DMA1_9_NEXT_DESC_PTR,
  45         (struct dma_register *) DMA1_10_NEXT_DESC_PTR,
  46         (struct dma_register *) DMA1_11_NEXT_DESC_PTR,
  47         (struct dma_register *) DMA2_0_NEXT_DESC_PTR,
  48         (struct dma_register *) DMA2_1_NEXT_DESC_PTR,
  49         (struct dma_register *) DMA2_2_NEXT_DESC_PTR,
  50         (struct dma_register *) DMA2_3_NEXT_DESC_PTR,
  51         (struct dma_register *) DMA2_4_NEXT_DESC_PTR,
  52         (struct dma_register *) DMA2_5_NEXT_DESC_PTR,
  53         (struct dma_register *) DMA2_6_NEXT_DESC_PTR,
  54         (struct dma_register *) DMA2_7_NEXT_DESC_PTR,
  55         (struct dma_register *) DMA2_8_NEXT_DESC_PTR,
  56         (struct dma_register *) DMA2_9_NEXT_DESC_PTR,
  57         (struct dma_register *) DMA2_10_NEXT_DESC_PTR,
  58         (struct dma_register *) DMA2_11_NEXT_DESC_PTR,
  59         (struct dma_register *) MDMA1_D0_NEXT_DESC_PTR,
  60         (struct dma_register *) MDMA1_S0_NEXT_DESC_PTR,
  61         (struct dma_register *) MDMA1_D1_NEXT_DESC_PTR,
  62         (struct dma_register *) MDMA1_S1_NEXT_DESC_PTR,
  63         (struct dma_register *) MDMA2_D0_NEXT_DESC_PTR,
  64         (struct dma_register *) MDMA2_S0_NEXT_DESC_PTR,
  65         (struct dma_register *) MDMA2_D1_NEXT_DESC_PTR,
  66         (struct dma_register *) MDMA2_S1_NEXT_DESC_PTR,
  67         (struct dma_register *) IMDMA_D0_NEXT_DESC_PTR,
  68         (struct dma_register *) IMDMA_S0_NEXT_DESC_PTR,
  69         (struct dma_register *) IMDMA_D1_NEXT_DESC_PTR,
  70         (struct dma_register *) IMDMA_S1_NEXT_DESC_PTR,
  71 };
  72 EXPORT_SYMBOL(dma_io_base_addr);
  73
  74 int channel2irq(unsigned int channel)
  75 {
  76         int ret_irq = -1;
  77
  78         switch (channel) {
  79         case CH_PPI0:
  80                 ret_irq = IRQ_PPI0;
  81                 break;
  82         case CH_PPI1:
  83                 ret_irq = IRQ_PPI1;
  84                 break;
  85         case CH_SPORT0_RX:
  86                 ret_irq = IRQ_SPORT0_RX;
  87                 break;
  88         case CH_SPORT0_TX:
  89                 ret_irq = IRQ_SPORT0_TX;
  90                 break;
  91         case CH_SPORT1_RX:
  92                 ret_irq = IRQ_SPORT1_RX;
  93                 break;
  94         case CH_SPORT1_TX:
  95                 ret_irq = IRQ_SPORT1_TX;
  96                 break;
  97         case CH_SPI:
  98                 ret_irq = IRQ_SPI;
  99                 break;
 100         case CH_UART_RX:
 101                 ret_irq = IRQ_UART_RX;
 102                 break;
 103         case CH_UART_TX:
 104                 ret_irq = IRQ_UART_TX;
 105                 break;
 106
 107         case CH_MEM_STREAM0_SRC:
 108         case CH_MEM_STREAM0_DEST:
 109                 ret_irq = IRQ_MEM_DMA0;
 110                 break;
 111         case CH_MEM_STREAM1_SRC:
 112         case CH_MEM_STREAM1_DEST:
 113                 ret_irq = IRQ_MEM_DMA1;
 114                 break;
 115         case CH_MEM_STREAM2_SRC:
 116         case CH_MEM_STREAM2_DEST:
 117                 ret_irq = IRQ_MEM_DMA2;
 118                 break;
 119         case CH_MEM_STREAM3_SRC:
 120         case CH_MEM_STREAM3_DEST:
 121                 ret_irq = IRQ_MEM_DMA3;
 122                 break;
 123
 124         case CH_IMEM_STREAM0_SRC:
 125         case CH_IMEM_STREAM0_DEST:
 126                 ret_irq = IRQ_IMEM_DMA0;
 127                 break;
 128         case CH_IMEM_STREAM1_SRC:
 129         case CH_IMEM_STREAM1_DEST:
 130                 ret_irq = IRQ_IMEM_DMA1;
 131                 break;
 132         }
 133         return ret_irq;
 134 }