Commit d8902adc authored by Nobuhiro Iwamatsu's avatar Nobuhiro Iwamatsu Committed by Dan Williams

dmaengine: sh: Add Support SuperH DMA Engine driver

This supported all DMA channels, and it was tested in SH7722,
SH7780, SH7785 and SH7763.
This can not use with SH DMA API.
Signed-off-by: default avatarNobuhiro Iwamatsu <iwamatsu.nobuhiro@renesas.com>
Reviewed-by: default avatarMatt Fleming <matt@console-pimps.org>
Acked-by: default avatarMaciej Sosnowski <maciej.sosnowski@intel.com>
Acked-by: default avatarPaul Mundt <lethal@linux-sh.org>
Signed-off-by: default avatarDan Williams <dan.j.williams@intel.com>
parent 9134d02b
menu "DMA support"
config SH_DMA_API
bool
config SH_DMA
bool "SuperH on-chip DMA controller (DMAC) support"
depends on CPU_SH3 || CPU_SH4
select SH_DMA_API
default n
config SH_DMA_IRQ_MULTI
......@@ -19,6 +16,15 @@ config SH_DMA_IRQ_MULTI
CPU_SUBTYPE_SH7780 || CPU_SUBTYPE_SH7785 || \
CPU_SUBTYPE_SH7760
config SH_DMA_API
depends on SH_DMA
bool "SuperH DMA API support"
default n
help
SH_DMA_API always enabled DMA API of used SuperH.
If you want to use DMA ENGINE, you must not enable this.
Please enable DMA_ENGINE and SH_DMAE.
config NR_ONCHIP_DMA_CHANNELS
int
depends on SH_DMA
......
......@@ -2,8 +2,7 @@
# Makefile for the SuperH DMA specific kernel interface routines under Linux.
#
obj-$(CONFIG_SH_DMA_API) += dma-api.o dma-sysfs.o
obj-$(CONFIG_SH_DMA) += dma-sh.o
obj-$(CONFIG_SH_DMA_API) += dma-sh.o dma-api.o dma-sysfs.o
obj-$(CONFIG_PVR2_DMA) += dma-pvr2.o
obj-$(CONFIG_G2_DMA) += dma-g2.o
obj-$(CONFIG_SH_DMABRG) += dmabrg.o
......@@ -115,4 +115,17 @@ static u32 dma_base_addr[] __maybe_unused = {
#define CHCR 0x0C
#define DMAOR 0x40
/*
* for dma engine
*
* SuperH DMA mode
*/
#define SHDMA_MIX_IRQ (1 << 1)
#define SHDMA_DMAOR1 (1 << 2)
#define SHDMA_DMAE1 (1 << 3)
struct sh_dmae_pdata {
unsigned int mode;
};
#endif /* __DMA_SH_H */
......@@ -101,6 +101,14 @@ config TXX9_DMAC
Support the TXx9 SoC internal DMA controller. This can be
integrated in chips such as the Toshiba TX4927/38/39.
config SH_DMAE
tristate "Renesas SuperH DMAC support"
depends on SUPERH && SH_DMA
depends on !SH_DMA_API
select DMA_ENGINE
help
Enable support for the Renesas SuperH DMA controllers.
config DMA_ENGINE
bool
......
......@@ -9,3 +9,4 @@ obj-$(CONFIG_DW_DMAC) += dw_dmac.o
obj-$(CONFIG_AT_HDMAC) += at_hdmac.o
obj-$(CONFIG_MX3_IPU) += ipu/
obj-$(CONFIG_TXX9_DMAC) += txx9dmac.o
obj-$(CONFIG_SH_DMAE) += shdma.o
This diff is collapsed.
/*
* Renesas SuperH DMA Engine support
*
* Copyright (C) 2009 Nobuhiro Iwamatsu <iwamatsu.nobuhiro@renesas.com>
* Copyright (C) 2009 Renesas Solutions, Inc. All rights reserved.
*
* This is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
*/
#ifndef __DMA_SHDMA_H
#define __DMA_SHDMA_H
#include <linux/device.h>
#include <linux/dmapool.h>
#include <linux/dmaengine.h>
#define SH_DMA_TCR_MAX 0x00FFFFFF /* 16MB */
struct sh_dmae_regs {
u32 sar; /* SAR / source address */
u32 dar; /* DAR / destination address */
u32 tcr; /* TCR / transfer count */
};
struct sh_desc {
struct list_head tx_list;
struct sh_dmae_regs hw;
struct list_head node;
struct dma_async_tx_descriptor async_tx;
int mark;
};
struct sh_dmae_chan {
dma_cookie_t completed_cookie; /* The maximum cookie completed */
spinlock_t desc_lock; /* Descriptor operation lock */
struct list_head ld_queue; /* Link descriptors queue */
struct list_head ld_free; /* Link descriptors free */
struct dma_chan common; /* DMA common channel */
struct device *dev; /* Channel device */
struct tasklet_struct tasklet; /* Tasklet */
int descs_allocated; /* desc count */
int id; /* Raw id of this channel */
char dev_id[16]; /* unique name per DMAC of channel */
/* Set chcr */
int (*set_chcr)(struct sh_dmae_chan *sh_chan, u32 regs);
/* Set DMA resource */
int (*set_dmars)(struct sh_dmae_chan *sh_chan, u16 res);
};
struct sh_dmae_device {
struct dma_device common;
struct sh_dmae_chan *chan[MAX_DMA_CHANNELS];
struct sh_dmae_pdata pdata;
};
#define to_sh_chan(chan) container_of(chan, struct sh_dmae_chan, common)
#define to_sh_desc(lh) container_of(lh, struct sh_desc, node)
#define tx_to_sh_desc(tx) container_of(tx, struct sh_desc, async_tx)
#endif /* __DMA_SHDMA_H */
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