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 */
  18 struct 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  */
  26 struct sudmac_slave_config {
  27         int             slave_id;
  28 };
  29
  30 struct 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
  37 struct 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