Re: [PATCH v3] dma: sudmac: add support for SUDMAC

["Shimoda, Yoshihiro" <yoshihiro.shimoda.uh@renesas.com>]

Hi Vinod,

(2013/04/09 16:32), Vinod Koul wrote:
> On Mon, Apr 08, 2013 at 02:38:54PM +0200, Guennadi Liakhovetski wrote:
>> Hi Vinod
>>
>> On Thu, 27 Sep 2012, Guennadi Liakhovetski wrote:
>>
>>> On Thu, 20 Sep 2012, Shimoda, Yoshihiro wrote:
>>>
>>>> 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>
>>
>> What happened to this patch? Are there plans to apply it?
> Looks like i missed this one, can you pls rebase this and I will do the needful

I will a rebased patch soon.

Best regards,
Yoshihiro Shimoda

> 
> --
> ~Vinod
>>
>> Thanks
>> Guennadi
>>
>>>> ---
>>>>  about v3:
>>>>   - use devm_request_and_ioremap
>>>>   - remove devm_kfree
>>>>   - remove a definition in the private header
>>>>   - add some comments in the public header
>>>>
>>>>  drivers/dma/Kconfig     |    8 +
>>>>  drivers/dma/Makefile    |    1 +
>>>>  drivers/dma/sh/Makefile |    1 +
>>>>  drivers/dma/sh/sudmac.c |  368 +++++++++++++++++++++++++++++++++++++++++++++++
>>>>  drivers/dma/sh/sudmac.h |   61 ++++++++
>>>>  include/linux/sudmac.h  |   55 +++++++
>>>>  6 files changed, 494 insertions(+), 0 deletions(-)
>>>>  create mode 100644 drivers/dma/sh/sudmac.c
>>>>  create mode 100644 drivers/dma/sh/sudmac.h
>>>>  create mode 100644 include/linux/sudmac.h
>>>>
>>>> diff --git a/drivers/dma/Kconfig b/drivers/dma/Kconfig
>>>> index d06ea29..fdd7bbe 100644
>>>> --- a/drivers/dma/Kconfig
>>>> +++ b/drivers/dma/Kconfig
>>>> @@ -171,6 +171,14 @@ config SH_DMAE
>>>>  	help
>>>>  	  Enable support for the Renesas SuperH DMA controllers.
>>>>
>>>> +config SUDMAC
>>>> +	tristate "Renesas SUDMAC support"
>>>> +	depends on (SUPERH && SH_DMA) || (ARM && ARCH_SHMOBILE)
>>>> +	depends on !SH_DMA_API
>>>> +	select DMA_ENGINE
>>>> +	help
>>>> +	  Enable support for the Renesas SUDMAC controllers.
>>>> +
>>>>  config COH901318
>>>>  	bool "ST-Ericsson COH901318 DMA support"
>>>>  	select DMA_ENGINE
>>>> diff --git a/drivers/dma/Makefile b/drivers/dma/Makefile
>>>> index 4cf6b12..b680e5e 100644
>>>> --- a/drivers/dma/Makefile
>>>> +++ b/drivers/dma/Makefile
>>>> @@ -16,6 +16,7 @@ obj-$(CONFIG_AT_HDMAC) += at_hdmac.o
>>>>  obj-$(CONFIG_MX3_IPU) += ipu/
>>>>  obj-$(CONFIG_TXX9_DMAC) += txx9dmac.o
>>>>  obj-$(CONFIG_SH_DMAE) += sh/
>>>> +obj-$(CONFIG_SUDMAC) += sh/
>>>>  obj-$(CONFIG_COH901318) += coh901318.o coh901318_lli.o
>>>>  obj-$(CONFIG_AMCC_PPC440SPE_ADMA) += ppc4xx/
>>>>  obj-$(CONFIG_IMX_SDMA) += imx-sdma.o
>>>> diff --git a/drivers/dma/sh/Makefile b/drivers/dma/sh/Makefile
>>>> index 54ae957..16f9225 100644
>>>> --- a/drivers/dma/sh/Makefile
>>>> +++ b/drivers/dma/sh/Makefile
>>>> @@ -1,2 +1,3 @@
>>>>  obj-$(CONFIG_SH_DMAE) += shdma-base.o
>>>>  obj-$(CONFIG_SH_DMAE) += shdma.o
>>>> +obj-$(CONFIG_SUDMAC) += shdma-base.o sudmac.o
>>>> diff --git a/drivers/dma/sh/sudmac.c b/drivers/dma/sh/sudmac.c
>>>> new file mode 100644
>>>> index 0000000..ffe963e
>>>> --- /dev/null
>>>> +++ b/drivers/dma/sh/sudmac.c
>>>> @@ -0,0 +1,368 @@
>>>> +/*
>>>> + * Renesas SUDMAC support
>>>> + *
>>>> + * Copyright (C) 2012 Renesas Solutions Corp.
>>>> + *
>>>> + * based on drivers/dma/sh/shdma.c:
>>>> + * Copyright (C) 2011-2012 Guennadi Liakhovetski <g.liakhovetski@gmx.de>
>>>> + * Copyright (C) 2009 Nobuhiro Iwamatsu <iwamatsu.nobuhiro@renesas.com>
>>>> + * Copyright (C) 2009 Renesas Solutions, Inc. All rights reserved.
>>>> + * Copyright (C) 2007 Freescale Semiconductor, Inc. All rights reserved.
>>>> + *
>>>> + * 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.
>>>> + */
>>>> +
>>>> +#include <linux/init.h>
>>>> +#include <linux/module.h>
>>>> +#include <linux/slab.h>
>>>> +#include <linux/interrupt.h>
>>>> +#include <linux/dmaengine.h>
>>>> +#include <linux/platform_device.h>
>>>> +#include <linux/sudmac.h>
>>>> +
>>>> +#include "sudmac.h"
>>>> +
>>>> +#define SUDMAC_DRV_NAME "sudmac"
>>>> +
>>>> +static void sudmac_writel(struct sudmac_chan *sc, u32 data, u32 reg)
>>>> +{
>>>> +	iowrite32(data, sc->base + reg);
>>>> +}
>>>> +
>>>> +static u32 sudmac_readl(struct sudmac_chan *sc, u32 reg)
>>>> +{
>>>> +	return ioread32(sc->base + reg);
>>>> +}
>>>> +
>>>> +static bool sudmac_is_busy(struct sudmac_chan *sc)
>>>> +{
>>>> +	u32 den = sudmac_readl(sc, CH0DEN + sc->offset);
>>>> +
>>>> +	if (den)
>>>> +		return true; /* working */
>>>> +
>>>> +	return false; /* waiting */
>>>> +}
>>>> +
>>>> +static void sudmac_set_reg(struct sudmac_chan *sc, struct sudmac_regs *hw,
>>>> +			   struct shdma_desc *sdesc)
>>>> +{
>>>> +	sudmac_writel(sc, sc->cfg, CH0CFG + sc->offset);
>>>> +	sudmac_writel(sc, hw->ba, CH0BA + sc->offset);
>>>> +	sudmac_writel(sc, hw->bbc, CH0BBC + sc->offset);
>>>> +}
>>>> +
>>>> +static void sudmac_start(struct sudmac_chan *sc)
>>>> +{
>>>> +	u32 dintctrl = sudmac_readl(sc, DINTCTRL);
>>>> +
>>>> +	sudmac_writel(sc, dintctrl | sc->dint_end_bit, DINTCTRL);
>>>> +	sudmac_writel(sc, 1, CH0DEN + sc->offset);
>>>> +}
>>>> +
>>>> +static void sudmac_start_xfer(struct shdma_chan *schan,
>>>> +			      struct shdma_desc *sdesc)
>>>> +{
>>>> +	struct sudmac_chan *sc = to_chan(schan);
>>>> +	struct sudmac_desc *sd = to_desc(sdesc);
>>>> +
>>>> +	sudmac_set_reg(sc, &sd->hw, sdesc);
>>>> +	sudmac_start(sc);
>>>> +}
>>>> +
>>>> +static bool sudmac_channel_busy(struct shdma_chan *schan)
>>>> +{
>>>> +	struct sudmac_chan *sc = to_chan(schan);
>>>> +
>>>> +	return sudmac_is_busy(sc);
>>>> +}
>>>> +
>>>> +static void sudmac_setup_xfer(struct shdma_chan *schan, int slave_id)
>>>> +{
>>>> +}
>>>> +
>>>> +static const struct sudmac_slave_config *sudmac_find_slave(
>>>> +	struct sudmac_chan *sc, int slave_id)
>>>> +{
>>>> +	struct sudmac_device *sdev = to_sdev(sc);
>>>> +	struct sudmac_pdata *pdata = sdev->pdata;
>>>> +	const struct sudmac_slave_config *cfg;
>>>> +	int i;
>>>> +
>>>> +	for (i = 0, cfg = pdata->slave; i < pdata->slave_num; i++, cfg++)
>>>> +		if (cfg->slave_id = slave_id)
>>>> +			return cfg;
>>>> +
>>>> +	return NULL;
>>>> +}
>>>> +
>>>> +static int sudmac_set_slave(struct shdma_chan *schan, int slave_id, bool try)
>>>> +{
>>>> +	struct sudmac_chan *sc = to_chan(schan);
>>>> +	const struct sudmac_slave_config *cfg = sudmac_find_slave(sc, slave_id);
>>>> +
>>>> +	if (!cfg)
>>>> +		return -ENODEV;
>>>> +
>>>> +	return 0;
>>>> +}
>>>> +
>>>> +static void sudmac_dma_halt(struct sudmac_chan *sc)
>>>> +{
>>>> +	u32 dintctrl = sudmac_readl(sc, DINTCTRL);
>>>> +
>>>> +	sudmac_writel(sc, 0, CH0DEN + sc->offset);
>>>> +	sudmac_writel(sc, dintctrl & ~sc->dint_end_bit, DINTCTRL);
>>>> +	sudmac_writel(sc, sc->dint_end_bit, DINTSTSCLR);
>>>> +}
>>>> +
>>>> +static int sudmac_desc_setup(struct shdma_chan *schan,
>>>> +			     struct shdma_desc *sdesc,
>>>> +			     dma_addr_t src, dma_addr_t dst, size_t *len)
>>>> +{
>>>> +	struct sudmac_chan *sc = to_chan(schan);
>>>> +	struct sudmac_desc *sd = to_desc(sdesc);
>>>> +
>>>> +	dev_dbg(sc->shdma_chan.dev, "%s: src=%x, dst=%x, len=%d\n",
>>>> +		__func__, src, dst, *len);
>>>> +
>>>> +	if (*len > schan->max_xfer_len)
>>>> +		*len = schan->max_xfer_len;
>>>> +
>>>> +	if (dst)
>>>> +		sd->hw.ba = dst;
>>>> +	else if (src)
>>>> +		sd->hw.ba = src;
>>>> +	sd->hw.bbc = *len;
>>>> +
>>>> +	return 0;
>>>> +}
>>>> +
>>>> +static void sudmac_halt(struct shdma_chan *schan)
>>>> +{
>>>> +	struct sudmac_chan *sc = to_chan(schan);
>>>> +
>>>> +	sudmac_dma_halt(sc);
>>>> +}
>>>> +
>>>> +static bool sudmac_chan_irq(struct shdma_chan *schan, int irq)
>>>> +{
>>>> +	struct sudmac_chan *sc = to_chan(schan);
>>>> +	u32 dintsts = sudmac_readl(sc, DINTSTS);
>>>> +
>>>> +	if (!(dintsts & sc->dint_end_bit))
>>>> +		return false;
>>>> +
>>>> +	/* DMA stop */
>>>> +	sudmac_dma_halt(sc);
>>>> +
>>>> +	return true;
>>>> +}
>>>> +
>>>> +static size_t sudmac_get_partial(struct shdma_chan *schan,
>>>> +				 struct shdma_desc *sdesc)
>>>> +{
>>>> +	struct sudmac_chan *sc = to_chan(schan);
>>>> +	struct sudmac_desc *sd = to_desc(sdesc);
>>>> +	u32 cbc = sudmac_readl(sc, CH0CBC + sc->offset);
>>>> +
>>>> +	return sd->hw.bbc - cbc;
>>>> +}
>>>> +
>>>> +static bool sudmac_desc_completed(struct shdma_chan *schan,
>>>> +				  struct shdma_desc *sdesc)
>>>> +{
>>>> +	struct sudmac_chan *sc = to_chan(schan);
>>>> +	struct sudmac_desc *sd = to_desc(sdesc);
>>>> +	u32 ca = sudmac_readl(sc, CH0CA + sc->offset);
>>>> +
>>>> +	return sd->hw.ba + sd->hw.bbc = ca;
>>>> +}
>>>> +
>>>> +static int __devinit sudmac_chan_probe(struct sudmac_device *su_dev, int id,
>>>> +				       int irq, unsigned long flags)
>>>> +{
>>>> +	struct shdma_dev *sdev = &su_dev->shdma_dev;
>>>> +	struct platform_device *pdev = to_platform_device(sdev->dma_dev.dev);
>>>> +	struct sudmac_chan *sc;
>>>> +	struct shdma_chan *schan;
>>>> +	int err;
>>>> +
>>>> +	sc = devm_kzalloc(&pdev->dev, sizeof(struct sudmac_chan), GFP_KERNEL);
>>>> +	if (!sc) {
>>>> +		dev_err(sdev->dma_dev.dev,
>>>> +			"No free memory for allocating dma channels!\n");
>>>> +		return -ENOMEM;
>>>> +	}
>>>> +
>>>> +	schan = &sc->shdma_chan;
>>>> +	schan->max_xfer_len = 64 * 1024 * 1024 - 1;
>>>> +
>>>> +	shdma_chan_probe(sdev, schan, id);
>>>> +
>>>> +	sc->base = su_dev->chan_reg;
>>>> +
>>>> +	sc->offset = su_dev->pdata->channel->offset;
>>>> +	sc->cfg = su_dev->pdata->channel->config;
>>>> +	sc->dint_end_bit = su_dev->pdata->channel->dint_end_bit;
>>>> +
>>>> +	/* set up channel irq */
>>>> +	if (pdev->id >= 0)
>>>> +		snprintf(sc->dev_id, sizeof(sc->dev_id), "sudmac%d.%d",
>>>> +			 pdev->id, id);
>>>> +	else
>>>> +		snprintf(sc->dev_id, sizeof(sc->dev_id), "sudmac%d", id);
>>>> +
>>>> +	err = shdma_request_irq(schan, irq, flags, sc->dev_id);
>>>> +	if (err) {
>>>> +		dev_err(sdev->dma_dev.dev,
>>>> +			"DMA channel %d request_irq failed %d\n", id, err);
>>>> +		goto err_no_irq;
>>>> +	}
>>>> +
>>>> +	su_dev->chan[id] = sc;
>>>> +	return 0;
>>>> +
>>>> +err_no_irq:
>>>> +	/* remove from dmaengine device node */
>>>> +	shdma_chan_remove(schan);
>>>> +	return err;
>>>> +}
>>>> +
>>>> +static void sudmac_chan_remove(struct sudmac_device *su_dev)
>>>> +{
>>>> +	struct dma_device *dma_dev = &su_dev->shdma_dev.dma_dev;
>>>> +	struct shdma_chan *schan;
>>>> +	int i;
>>>> +
>>>> +	shdma_for_each_chan(schan, &su_dev->shdma_dev, i) {
>>>> +		struct sudmac_chan *sc = to_chan(schan);
>>>> +
>>>> +		BUG_ON(!schan);
>>>> +
>>>> +		shdma_free_irq(&sc->shdma_chan);
>>>> +		shdma_chan_remove(schan);
>>>> +	}
>>>> +	dma_dev->chancnt = 0;
>>>> +}
>>>> +
>>>> +static dma_addr_t sudmac_slave_addr(struct shdma_chan *schan)
>>>> +{
>>>> +	/* SUDMAC doesn't need the address */
>>>> +	return 0;
>>>> +}
>>>> +
>>>> +static struct shdma_desc *sudmac_embedded_desc(void *buf, int i)
>>>> +{
>>>> +	return &((struct sudmac_desc *)buf)[i].shdma_desc;
>>>> +}
>>>> +
>>>> +static const struct shdma_ops sudmac_shdma_ops = {
>>>> +	.desc_completed = sudmac_desc_completed,
>>>> +	.halt_channel = sudmac_halt,
>>>> +	.channel_busy = sudmac_channel_busy,
>>>> +	.slave_addr = sudmac_slave_addr,
>>>> +	.desc_setup = sudmac_desc_setup,
>>>> +	.set_slave = sudmac_set_slave,
>>>> +	.setup_xfer = sudmac_setup_xfer,
>>>> +	.start_xfer = sudmac_start_xfer,
>>>> +	.embedded_desc = sudmac_embedded_desc,
>>>> +	.chan_irq = sudmac_chan_irq,
>>>> +	.get_partial = sudmac_get_partial,
>>>> +};
>>>> +
>>>> +static int __devinit sudmac_probe(struct platform_device *pdev)
>>>> +{
>>>> +	struct sudmac_pdata *pdata = pdev->dev.platform_data;
>>>> +	int err, i;
>>>> +	struct sudmac_device *su_dev;
>>>> +	struct dma_device *dma_dev;
>>>> +	struct resource *chan, *irq_res;
>>>> +
>>>> +	/* get platform data */
>>>> +	if (!pdata)
>>>> +		return -ENODEV;
>>>> +
>>>> +	chan = platform_get_resource(pdev, IORESOURCE_MEM, 0);
>>>> +	irq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
>>>> +	if (!chan || !irq_res)
>>>> +		return -ENODEV;
>>>> +
>>>> +	err = -ENOMEM;
>>>> +	su_dev = devm_kzalloc(&pdev->dev, sizeof(struct sudmac_device),
>>>> +			      GFP_KERNEL);
>>>> +	if (!su_dev) {
>>>> +		dev_err(&pdev->dev, "Not enough memory\n");
>>>> +		return err;
>>>> +	}
>>>> +
>>>> +	dma_dev = &su_dev->shdma_dev.dma_dev;
>>>> +
>>>> +	su_dev->chan_reg = devm_request_and_ioremap(&pdev->dev, chan);
>>>> +	if (!su_dev->chan_reg)
>>>> +		return err;
>>>> +
>>>> +	dma_cap_set(DMA_SLAVE, dma_dev->cap_mask);
>>>> +
>>>> +	su_dev->shdma_dev.ops = &sudmac_shdma_ops;
>>>> +	su_dev->shdma_dev.desc_size = sizeof(struct sudmac_desc);
>>>> +	err = shdma_init(&pdev->dev, &su_dev->shdma_dev, pdata->channel_num);
>>>> +	if (err < 0)
>>>> +		return err;
>>>> +
>>>> +	/* platform data */
>>>> +	su_dev->pdata = pdev->dev.platform_data;
>>>> +
>>>> +	platform_set_drvdata(pdev, su_dev);
>>>> +
>>>> +	/* Create DMA Channel */
>>>> +	for (i = 0; i < pdata->channel_num; i++) {
>>>> +		err = sudmac_chan_probe(su_dev, i, irq_res->start, IRQF_SHARED);
>>>> +		if (err)
>>>> +			goto chan_probe_err;
>>>> +	}
>>>> +
>>>> +	err = dma_async_device_register(&su_dev->shdma_dev.dma_dev);
>>>> +	if (err < 0)
>>>> +		goto chan_probe_err;
>>>> +
>>>> +	return err;
>>>> +
>>>> +chan_probe_err:
>>>> +	sudmac_chan_remove(su_dev);
>>>> +
>>>> +	platform_set_drvdata(pdev, NULL);
>>>> +	shdma_cleanup(&su_dev->shdma_dev);
>>>> +
>>>> +	return err;
>>>> +}
>>>> +
>>>> +static int __devexit sudmac_remove(struct platform_device *pdev)
>>>> +{
>>>> +	struct sudmac_device *su_dev = platform_get_drvdata(pdev);
>>>> +	struct dma_device *dma_dev = &su_dev->shdma_dev.dma_dev;
>>>> +
>>>> +	dma_async_device_unregister(dma_dev);
>>>> +	sudmac_chan_remove(su_dev);
>>>> +	shdma_cleanup(&su_dev->shdma_dev);
>>>> +	platform_set_drvdata(pdev, NULL);
>>>> +
>>>> +	return 0;
>>>> +}
>>>> +
>>>> +static struct platform_driver sudmac_driver = {
>>>> +	.driver 	= {
>>>> +		.owner	= THIS_MODULE,
>>>> +		.name	= SUDMAC_DRV_NAME,
>>>> +	},
>>>> +	.probe		= sudmac_probe,
>>>> +	.remove		= __devexit_p(sudmac_remove),
>>>> +};
>>>> +module_platform_driver(sudmac_driver);
>>>> +
>>>> +MODULE_AUTHOR("Yoshihiro Shimoda");
>>>> +MODULE_DESCRIPTION("Renesas SUDMAC driver");
>>>> +MODULE_LICENSE("GPL v2");
>>>> +MODULE_ALIAS("platform:" SUDMAC_DRV_NAME);
>>>> diff --git a/drivers/dma/sh/sudmac.h b/drivers/dma/sh/sudmac.h
>>>> new file mode 100644
>>>> index 0000000..a15adea
>>>> --- /dev/null
>>>> +++ b/drivers/dma/sh/sudmac.h
>>>> @@ -0,0 +1,61 @@
>>>> +/*
>>>> + * Renesas SUDMAC support
>>>> + *
>>>> + * Copyright (C) 2012 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 __DMA_SUDMAC_H
>>>> +#define __DMA_SUDMAC_H
>>>> +
>>>> +#define SUDMAC_MAX_CHANNELS 2
>>>> +
>>>> +struct sudmac_chan {
>>>> +	struct shdma_chan shdma_chan;
>>>> +	void __iomem *base;
>>>> +	char dev_id[16];	/* unique name per DMAC of channel */
>>>> +
>>>> +	u32 offset;		/* for CFG, BA, BBC, CA, CBC, DEN */
>>>> +	u32 cfg;
>>>> +	u32 dint_end_bit;
>>>> +};
>>>> +
>>>> +struct sudmac_device {
>>>> +	struct shdma_dev shdma_dev;
>>>> +	struct sudmac_chan *chan[SUDMAC_MAX_CHANNELS];
>>>> +	struct sudmac_pdata *pdata;
>>>> +	void __iomem *chan_reg;
>>>> +};
>>>> +
>>>> +struct sudmac_regs {
>>>> +	u32 ba;
>>>> +	u32 bbc;
>>>> +};
>>>> +
>>>> +struct sudmac_desc {
>>>> +	struct sudmac_regs hw;
>>>> +	struct shdma_desc shdma_desc;
>>>> +};
>>>> +
>>>> +#define to_chan(schan) container_of(schan, struct sudmac_chan, shdma_chan)
>>>> +#define to_desc(sdesc) container_of(sdesc, struct sudmac_desc, shdma_desc)
>>>> +#define to_sdev(sc) container_of(sc->shdma_chan.dma_chan.device, \
>>>> +				 struct sudmac_device, shdma_dev.dma_dev)
>>>> +
>>>> +/* SUDMAC register */
>>>> +#define CH0CFG		0x00
>>>> +#define CH0BA		0x10
>>>> +#define CH0BBC		0x18
>>>> +#define CH0CA		0x20
>>>> +#define CH0CBC		0x28
>>>> +#define CH0DEN		0x30
>>>> +#define DSTSCLR		0x38
>>>> +#define DBUFCTRL	0x3C
>>>> +#define DINTCTRL	0x40
>>>> +#define DINTSTS		0x44
>>>> +#define DINTSTSCLR	0x48
>>>> +#define CH0SHCTRL	0x50
>>>> +
>>>> +#endif	/* __DMA_SUDMAC_H */
>>>> diff --git a/include/linux/sudmac.h b/include/linux/sudmac.h
>>>> new file mode 100644
>>>> index 0000000..91e5bef
>>>> --- /dev/null
>>>> +++ b/include/linux/sudmac.h
>>>> @@ -0,0 +1,55 @@
>>>> +/*
>>>> + * Header for the SUDMAC driver
>>>> + *
>>>> + * Copyright (C) 2012 Renesas Solutions Corp.
>>>> + *
>>>> + * based on include/linux/sh_dma.h:
>>>> + * Copyright (C) 2010 Guennadi Liakhovetski <g.liakhovetski@gmx.de>
>>>> + *
>>>> + * 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	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_SENDBUFM	0x1000 /* b12: Transmit Buffer Mode */
>>>> +#define SUDMAC_RCVENDM	0x0100 /* b8: Receive Data Transfer End Mode */
>>>> +#define SUDMAC_LBA_WAIT	0x0030 /* b5-4: Local Bus Access Wait */
>>>> +
>>>> +/* Definitions for the sudmac_channel.dint_end_bit */
>>>> +#define SUDMAC_CH1ENDE	0x0002 /* b1: Ch1 DMA Transfer End Int Enable */
>>>> +#define SUDMAC_CH0ENDE	0x0001 /* b0: Ch0 DMA Transfer End Int Enable */
>>>> +
>>>> +#endif
>>>> -- 
>>>> 1.7.1
>>>>
>>>
>>> ---
>>> Guennadi Liakhovetski, Ph.D.
>>> Freelance Open-Source Software Developer
>>> http://www.open-technology.de/
>>>
>>
>> ---
>> Guennadi Liakhovetski, Ph.D.
>> Freelance Open-Source Software Developer
>> http://www.open-technology.de/
> 

-- 
Yoshihiro Shimoda
EC No.