Commit 18a1053f authored by Shimoda, Yoshihiro's avatar Shimoda, Yoshihiro Committed by Vinod Koul

sudmac: add support for SUDMAC

Some Renesas USB modules have SUDMAC. This patch supports it using
the shdma-base driver.
Signed-off-by: default avatarYoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Reviewed-by: default avatarGuennadi Liakhovetski <g.liakhovetski@gmx.de>
Acked-by: default avatarKuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: default avatarVinod Koul <vinod.koul@intel.com>
parent 189b4ee8
...@@ -16,3 +16,9 @@ config SH_DMAE ...@@ -16,3 +16,9 @@ config SH_DMAE
depends on SH_DMAE_BASE depends on SH_DMAE_BASE
help help
Enable support for the Renesas SuperH DMA controllers. Enable support for the Renesas SuperH DMA controllers.
config SUDMAC
tristate "Renesas SUDMAC support"
depends on SH_DMAE_BASE
help
Enable support for the Renesas SUDMAC controllers.
obj-$(CONFIG_SH_DMAE_BASE) += shdma-base.o obj-$(CONFIG_SH_DMAE_BASE) += shdma-base.o
obj-$(CONFIG_SH_DMAE) += shdma.o obj-$(CONFIG_SH_DMAE) += shdma.o
obj-$(CONFIG_SUDMAC) += sudmac.o
This diff is collapsed.
/*
* 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
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