LXR linux/include/linux/sudmac.h

   1/* SPDX-License-Identifier: GPL-2.0-only */
   2/*
   3 * Header for the SUDMAC driver
   4 *
   5 * Copyright (C) 2013 Renesas Solutions Corp.
   6 */
   7#ifndef SUDMAC_H
   8#define SUDMAC_H
   9
  10#include <linux/dmaengine.h>
  11#include <linux/shdma-base.h>
  12#include <linux/types.h>
  13
  14/* Used by slave DMA clients to request DMA to/from a specific peripheral */
  15struct sudmac_slave {
  16        struct shdma_slave      shdma_slave;    /* Set by the platform */
  17};
  18
  19/*
  20 * Supplied by platforms to specify, how a DMA channel has to be configured for
  21 * a certain peripheral
  22 */
  23struct sudmac_slave_config {
  24        int             slave_id;
  25};
  26
  27struct sudmac_channel {
  28        unsigned long   offset;
  29        unsigned long   config;
  30        unsigned long   wait;           /* The configuable range is 0 to 3 */
  31        unsigned long   dint_end_bit;
  32};
  33
  34struct sudmac_pdata {
  35        const struct sudmac_slave_config *slave;
  36        int slave_num;
  37        const struct sudmac_channel *channel;
  38        int channel_num;
  39};
  40
  41/* Definitions for the sudmac_channel.config */
  42#define SUDMAC_TX_BUFFER_MODE   BIT(0)
  43#define SUDMAC_RX_END_MODE      BIT(1)
  44
  45/* Definitions for the sudmac_channel.dint_end_bit */
  46#define SUDMAC_DMA_BIT_CH0      BIT(0)
  47#define SUDMAC_DMA_BIT_CH1      BIT(1)
  48
  49#endif
  50