forked from mirrors/linux
18a1053f7b
Some Renesas USB modules have SUDMAC. This patch supports it using the shdma-base driver. Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com> Reviewed-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de> Acked-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
52 lines
1.2 KiB
C
52 lines
1.2 KiB
C
/*
|
|
* Header for the SUDMAC driver
|
|
*
|
|
* Copyright (C) 2013 Renesas Solutions Corp.
|
|
*
|
|
* This is free software; you can redistribute it and/or modify
|
|
* it under the terms of version 2 of the GNU General Public License as
|
|
* published by the Free Software Foundation.
|
|
*/
|
|
#ifndef SUDMAC_H
|
|
#define SUDMAC_H
|
|
|
|
#include <linux/dmaengine.h>
|
|
#include <linux/shdma-base.h>
|
|
#include <linux/types.h>
|
|
|
|
/* Used by slave DMA clients to request DMA to/from a specific peripheral */
|
|
struct sudmac_slave {
|
|
struct shdma_slave shdma_slave; /* Set by the platform */
|
|
};
|
|
|
|
/*
|
|
* Supplied by platforms to specify, how a DMA channel has to be configured for
|
|
* a certain peripheral
|
|
*/
|
|
struct sudmac_slave_config {
|
|
int slave_id;
|
|
};
|
|
|
|
struct sudmac_channel {
|
|
unsigned long offset;
|
|
unsigned long config;
|
|
unsigned long wait; /* The configuable range is 0 to 3 */
|
|
unsigned long dint_end_bit;
|
|
};
|
|
|
|
struct sudmac_pdata {
|
|
const struct sudmac_slave_config *slave;
|
|
int slave_num;
|
|
const struct sudmac_channel *channel;
|
|
int channel_num;
|
|
};
|
|
|
|
/* Definitions for the sudmac_channel.config */
|
|
#define SUDMAC_TX_BUFFER_MODE BIT(0)
|
|
#define SUDMAC_RX_END_MODE BIT(1)
|
|
|
|
/* Definitions for the sudmac_channel.dint_end_bit */
|
|
#define SUDMAC_DMA_BIT_CH0 BIT(0)
|
|
#define SUDMAC_DMA_BIT_CH1 BIT(1)
|
|
|
|
#endif
|