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 */
  15 struct 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  */
  23 struct sudmac_slave_config {
  24         int             slave_id;
  25 };
  26
  27 struct 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
  34 struct 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