LXR linux/include/linux/sudmac.h

   1/*
   2 * Header for the SUDMAC driver
   3 *
   4 * Copyright (C) 2013 Renesas Solutions Corp.
   5 *
   6 * This is free software; you can redistribute it and/or modify
   7 * it under the terms of version 2 of the GNU General Public License as
   8 * published by the Free Software Foundation.
   9 */
  10#ifndef SUDMAC_H
  11#define SUDMAC_H
  12
  13#include <linux/dmaengine.h>
  14#include <linux/shdma-base.h>
  15#include <linux/types.h>
  16
  17/* Used by slave DMA clients to request DMA to/from a specific peripheral */
  18struct sudmac_slave {
  19        struct shdma_slave      shdma_slave;    /* Set by the platform */
  20};
  21
  22/*
  23 * Supplied by platforms to specify, how a DMA channel has to be configured for
  24 * a certain peripheral
  25 */
  26struct sudmac_slave_config {
  27        int             slave_id;
  28};
  29
  30struct sudmac_channel {
  31        unsigned long   offset;
  32        unsigned long   config;
  33        unsigned long   wait;           /* The configuable range is 0 to 3 */
  34        unsigned long   dint_end_bit;
  35};
  36
  37struct sudmac_pdata {
  38        const struct sudmac_slave_config *slave;
  39        int slave_num;
  40        const struct sudmac_channel *channel;
  41        int channel_num;
  42};
  43
  44/* Definitions for the sudmac_channel.config */
  45#define SUDMAC_TX_BUFFER_MODE   BIT(0)
  46#define SUDMAC_RX_END_MODE      BIT(1)
  47
  48/* Definitions for the sudmac_channel.dint_end_bit */
  49#define SUDMAC_DMA_BIT_CH0      BIT(0)
  50#define SUDMAC_DMA_BIT_CH1      BIT(1)
  51
  52#endif
  53