include/asm-arm/plat-s3c24xx/dma.h

   1 /* linux/include/asm-arm/plat-s3c24xx/dma.h
   2  *
   3  * Copyright (C) 2006 Simtec Electronics
   4  *      Ben Dooks <ben@simtec.co.uk>
   5  *
   6  * Samsung S3C24XX DMA support
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License version 2 as
  10  * published by the Free Software Foundation.
  11 */
  12
  13 extern struct sysdev_class dma_sysclass;
  14 extern struct s3c2410_dma_chan s3c2410_chans[S3C2410_DMA_CHANNELS];
  15
  16 #define DMA_CH_VALID            (1<<31)
  17
  18 struct s3c24xx_dma_addr {
  19         unsigned long           from;
  20         unsigned long           to;
  21 };
  22
  23 /* struct s3c24xx_dma_map
  24  *
  25  * this holds the mapping information for the channel selected
  26  * to be connected to the specified device
  27 */
  28
  29 struct s3c24xx_dma_map {
  30         const char              *name;
  31         struct s3c24xx_dma_addr  hw_addr;
  32
  33         unsigned long            channels[S3C2410_DMA_CHANNELS];
  34 };
  35
  36 struct s3c24xx_dma_selection {
  37         struct s3c24xx_dma_map  *map;
  38         unsigned long            map_size;
  39         unsigned long            dcon_mask;
  40
  41         void    (*select)(struct s3c2410_dma_chan *chan,
  42                           struct s3c24xx_dma_map *map);
  43 };
  44
  45 extern int s3c24xx_dma_init_map(struct s3c24xx_dma_selection *sel);