Logo Search packages:      
Sourcecode: linux version File versions  Download package

dma-s3c24xx.h

/* linux/arch/arm/plat-samsung/include/plat/dma-s3c24xx.h
 *
 * Copyright (C) 2006 Simtec Electronics
 *    Ben Dooks <ben@simtec.co.uk>
 *
 * Samsung S3C24XX DMA support - per SoC functions
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
*/

#include <plat/dma-core.h>

extern struct sysdev_class dma_sysclass;
extern struct s3c2410_dma_chan s3c2410_chans[S3C_DMA_CHANNELS];

#define DMA_CH_VALID          (1<<31)
#define DMA_CH_NEVER          (1<<30)

00021 struct s3c24xx_dma_addr {
      unsigned long           from;
      unsigned long           to;
};

/* struct s3c24xx_dma_map
 *
 * this holds the mapping information for the channel selected
 * to be connected to the specified device
*/

00032 struct s3c24xx_dma_map {
      const char        *name;
      struct s3c24xx_dma_addr  hw_addr;

      unsigned long            channels[S3C_DMA_CHANNELS];
      unsigned long            channels_rx[S3C_DMA_CHANNELS];
};

00040 struct s3c24xx_dma_selection {
      struct s3c24xx_dma_map  *map;
      unsigned long            map_size;
      unsigned long            dcon_mask;

      void  (*select)(struct s3c2410_dma_chan *chan,
                    struct s3c24xx_dma_map *map);

      void  (*direction)(struct s3c2410_dma_chan *chan,
                       struct s3c24xx_dma_map *map,
                       enum s3c2410_dmasrc dir);
};

extern int s3c24xx_dma_init_map(struct s3c24xx_dma_selection *sel);

/* struct s3c24xx_dma_order_ch
 *
 * channel map for one of the `enum dma_ch` dma channels. the list
 * entry contains a set of low-level channel numbers, orred with
 * DMA_CH_VALID, which are checked in the order in the array.
*/

00062 struct s3c24xx_dma_order_ch {
      unsigned int      list[S3C_DMA_CHANNELS]; /* list of channels */
      unsigned int      flags;                        /* flags */
};

/* struct s3c24xx_dma_order
 *
 * information provided by either the core or the board to give the
 * dma system a hint on how to allocate channels
*/

00073 struct s3c24xx_dma_order {
      struct s3c24xx_dma_order_ch   channels[DMACH_MAX];
};

extern int s3c24xx_dma_order_set(struct s3c24xx_dma_order *map);

/* DMA init code, called from the cpu support code */

extern int s3c2410_dma_init(void);

extern int s3c24xx_dma_init(unsigned int channels, unsigned int irq,
                      unsigned int stride);

Generated by  Doxygen 1.6.0   Back to index