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TOMOYO Linux Cross Reference
Linux/include/linux/sudmac.h

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  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
 53 

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