From: Kuninori Morimoto <[email protected]>
Add support Audio DMAC peri peri driver
for Renesas R-Car Gen2 SoC, using 'shdma-base'
DMA driver framework.
Signed-off-by: Kuninori Morimoto <[email protected]>
---
drivers/dma/sh/Kconfig | 6 +
drivers/dma/sh/Makefile | 1 +
drivers/dma/sh/rcar-audmapp.c | 325 ++++++++++++++++++++++++
include/linux/platform_data/dma-rcar-audmapp.h | 34 +++
4 files changed, 366 insertions(+)
create mode 100644 drivers/dma/sh/rcar-audmapp.c
create mode 100644 include/linux/platform_data/dma-rcar-audmapp.h
diff --git a/drivers/dma/sh/Kconfig b/drivers/dma/sh/Kconfig
index dadd9e01..b4c8138 100644
--- a/drivers/dma/sh/Kconfig
+++ b/drivers/dma/sh/Kconfig
@@ -29,6 +29,12 @@ config RCAR_HPB_DMAE
help
Enable support for the Renesas R-Car series DMA controllers.
+config RCAR_AUDMAC_PP
+ tristate "Renesas R-Car Audio DMAC Peripheral Peripheral support"
+ depends on SH_DMAE_BASE
+ help
+ Enable support for the Renesas R-Car Audio DMAC Peripheral Peripheral controllers.
+
config SHDMA_R8A73A4
def_bool y
depends on ARCH_R8A73A4 && SH_DMAE != n
diff --git a/drivers/dma/sh/Makefile b/drivers/dma/sh/Makefile
index e856af2..1ce88b2 100644
--- a/drivers/dma/sh/Makefile
+++ b/drivers/dma/sh/Makefile
@@ -7,3 +7,4 @@ endif
shdma-objs := $(shdma-y)
obj-$(CONFIG_SUDMAC) += sudmac.o
obj-$(CONFIG_RCAR_HPB_DMAE) += rcar-hpbdma.o
+obj-$(CONFIG_RCAR_AUDMAC_PP) += rcar-audmapp.o
diff --git a/drivers/dma/sh/rcar-audmapp.c b/drivers/dma/sh/rcar-audmapp.c
new file mode 100644
index 0000000..a5e5a1a
--- /dev/null
+++ b/drivers/dma/sh/rcar-audmapp.c
@@ -0,0 +1,325 @@
+/*
+ * drivers/dma/sh/rcar-audmapp.c
+ *
+ * Copyright (C) 2013 Renesas Electronics Corporation
+ * Copyright (C) 2013 Kuninori Morimoto <[email protected]>
+ *
+ * based on the drivers/dma/sh/shdma.c
+ *
+ * Copyright (C) 2011-2012 Guennadi Liakhovetski <[email protected]>
+ * Copyright (C) 2009 Nobuhiro Iwamatsu <[email protected]>
+ * 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 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.
+ *
+ */
+#include <linux/delay.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/dmaengine.h>
+#include <linux/platform_data/dma-rcar-audmapp.h>
+#include <linux/platform_device.h>
+#include <linux/shdma-base.h>
+
+/*
+ * DMA register
+ */
+#define PDMASAR 0x00
+#define PDMADAR 0x04
+#define PDMACHCR 0x0c
+
+/* PDMACHCR */
+#define PDMACHCR_DE (1 << 0)
+
+#define AUDMAPP_MAX_CHANNELS 29
+
+/* Default MEMCPY transfer size = 2^2 = 4 bytes */
+#define LOG2_DEFAULT_XFER_SIZE 2
+#define AUDMAPP_SLAVE_NUMBER 256
+#define AUDMAPP_LEN_MAX (16 * 1024 * 1024)
+
+struct audmapp_chan {
+ struct shdma_chan shdma_chan;
+ struct audmapp_slave_config *config;
+ void __iomem *base;
+};
+
+struct audmapp_device {
+ struct shdma_dev shdma_dev;
+ struct audmapp_pdata *pdata;
+ struct device *dev;
+ void __iomem *chan_reg;
+};
+
+#define to_chan(chan) container_of(chan, struct audmapp_chan, shdma_chan)
+#define to_dev(chan) container_of(chan->shdma_chan.dma_chan.device, \
+ struct audmapp_device, shdma_dev.dma_dev)
+
+static void audmapp_write(struct audmapp_chan *auchan, u32 data, u32 reg)
+{
+ struct audmapp_device *audev = to_dev(auchan);
+ struct device *dev = audev->dev;
+
+ dev_dbg(dev, "w %p : %08x\n", auchan->base + reg, data);
+
+ iowrite32(data, auchan->base + reg);
+}
+
+static u32 audmapp_read(struct audmapp_chan *auchan, u32 reg)
+{
+ return ioread32(auchan->base + reg);
+}
+
+static void audmapp_halt(struct shdma_chan *schan)
+{
+ struct audmapp_chan *auchan = to_chan(schan);
+ int i;
+
+ audmapp_write(auchan, 0, PDMACHCR);
+
+ for(i = 0; i < 1024; i++) {
+ if (0 == audmapp_read(auchan, PDMACHCR))
+ return;
+ udelay(1);
+ }
+}
+
+static void audmapp_start_xfer(struct shdma_chan *schan,
+ struct shdma_desc *sdecs)
+{
+ struct audmapp_chan *auchan = to_chan(schan);
+ struct audmapp_device *audev = to_dev(auchan);
+ struct audmapp_slave_config *cfg = auchan->config;
+ struct device *dev = audev->dev;
+ u32 chcr = cfg->chcr | PDMACHCR_DE;
+
+ dev_dbg(dev, "src/dst/chcr = %x/%x/%x\n",
+ cfg->src, cfg->dst, cfg->chcr);
+
+ audmapp_write(auchan, cfg->src, PDMASAR);
+ audmapp_write(auchan, cfg->dst, PDMADAR);
+ audmapp_write(auchan, chcr, PDMACHCR);
+}
+
+static struct audmapp_slave_config *
+audmapp_find_slave(struct audmapp_chan *auchan, int slave_id)
+{
+ struct audmapp_device *audev = to_dev(auchan);
+ struct audmapp_pdata *pdata = audev->pdata;
+ struct audmapp_slave_config *cfg;
+ int i;
+
+ if (slave_id >= AUDMAPP_SLAVE_NUMBER)
+ return NULL;
+
+ for (i = 0, cfg = pdata->slave; i < pdata->slave_num; i++, cfg++)
+ if (cfg->slave_id == slave_id)
+ return cfg;
+
+ return NULL;
+}
+
+static int audmapp_set_slave(struct shdma_chan *schan, int slave_id,
+ dma_addr_t slave_addr, bool try)
+{
+ struct audmapp_chan *auchan = to_chan(schan);
+ struct audmapp_slave_config *cfg =
+ audmapp_find_slave(auchan, slave_id);
+
+ if (!cfg)
+ return -ENODEV;
+ if (try)
+ return 0;
+
+ auchan->config = cfg;
+
+ return 0;
+}
+
+static int audmapp_desc_setup(struct shdma_chan *schan,
+ struct shdma_desc *sdecs,
+ dma_addr_t src, dma_addr_t dst, size_t *len)
+{
+ struct audmapp_chan *auchan = to_chan(schan);
+ struct audmapp_slave_config *cfg = auchan->config;
+
+ if (!cfg)
+ return -ENODEV;
+
+ if (*len > (size_t)AUDMAPP_LEN_MAX)
+ *len = (size_t)AUDMAPP_LEN_MAX;
+
+ return 0;
+}
+
+static void audmapp_setup_xfer(struct shdma_chan *schan,
+ int slave_id)
+{
+}
+
+static dma_addr_t audmapp_slave_addr(struct shdma_chan *schan)
+{
+ return 0; /* always fixed address */
+}
+
+static bool audmapp_channel_busy(struct shdma_chan *schan)
+{
+ struct audmapp_chan *auchan = to_chan(schan);
+ u32 chcr = audmapp_read(auchan, PDMACHCR);
+
+ return chcr & ~PDMACHCR_DE;
+}
+
+static bool audmapp_desc_completed(struct shdma_chan *schan,
+ struct shdma_desc *sdesc)
+{
+ return true;
+}
+
+static struct shdma_desc *audmapp_embedded_desc(void *buf, int i)
+{
+ return &((struct shdma_desc *)buf)[i];
+}
+
+static const struct shdma_ops audmapp_shdma_ops = {
+ .halt_channel = audmapp_halt,
+ .desc_setup = audmapp_desc_setup,
+ .set_slave = audmapp_set_slave,
+ .start_xfer = audmapp_start_xfer,
+ .embedded_desc = audmapp_embedded_desc,
+ .setup_xfer = audmapp_setup_xfer,
+ .slave_addr = audmapp_slave_addr,
+ .channel_busy = audmapp_channel_busy,
+ .desc_completed = audmapp_desc_completed,
+};
+
+static int audmapp_chan_probe(struct platform_device *pdev,
+ struct audmapp_device *audev, int id)
+{
+ struct shdma_dev *sdev = &audev->shdma_dev;
+ struct audmapp_chan *auchan;
+ struct shdma_chan *schan;
+ struct device *dev = audev->dev;
+
+ auchan = devm_kzalloc(dev, sizeof(struct audmapp_chan), GFP_KERNEL);
+ if (!auchan) {
+ dev_err(dev, "No free memory for allocating dma channels!\n");
+ return -ENOMEM;
+ }
+
+ schan = &auchan->shdma_chan;
+ schan->max_xfer_len = AUDMAPP_LEN_MAX;
+
+ shdma_chan_probe(sdev, schan, id);
+
+ auchan->base = audev->chan_reg + 0x20 + (0x10 * id);
+ dev_dbg(dev, "%02d : %p / %p", id, auchan->base, audev->chan_reg);
+
+ return 0;
+}
+
+static void audmapp_chan_remove(struct audmapp_device *audev)
+{
+ struct dma_device *dma_dev = &audev->shdma_dev.dma_dev;
+ struct shdma_chan *schan;
+ int i;
+
+ shdma_for_each_chan(schan, &audev->shdma_dev, i) {
+ BUG_ON(!schan);
+ shdma_chan_remove(schan);
+ }
+ dma_dev->chancnt = 0;
+}
+
+static int audmapp_probe(struct platform_device *pdev)
+{
+ struct audmapp_pdata *pdata = pdev->dev.platform_data;
+ struct audmapp_device *audev;
+ struct shdma_dev *sdev;
+ struct dma_device *dma_dev;
+ struct resource *res;
+ int err, i;
+
+ if (!pdata)
+ return -ENODEV;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+
+ audev = devm_kzalloc(&pdev->dev, sizeof(struct audmapp_device),
+ GFP_KERNEL);
+ if (!audev) {
+ dev_err(&pdev->dev, "Not enough memory\n");
+ return -ENOMEM;
+ }
+
+ audev->dev = &pdev->dev;
+ audev->pdata = pdata;
+ audev->chan_reg = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(audev->chan_reg))
+ return PTR_ERR(audev->chan_reg);
+
+ sdev = &audev->shdma_dev;
+ sdev->ops = &audmapp_shdma_ops;
+ sdev->desc_size = sizeof(struct shdma_desc);
+
+ dma_dev = &sdev->dma_dev;
+ dma_dev->copy_align = LOG2_DEFAULT_XFER_SIZE;
+ dma_cap_set(DMA_SLAVE, dma_dev->cap_mask);
+
+ err = shdma_init(&pdev->dev, sdev, AUDMAPP_MAX_CHANNELS);
+ if (err < 0)
+ return err;
+
+ platform_set_drvdata(pdev, audev);
+
+ /* Create DMA Channel */
+ for (i = 0; i < AUDMAPP_MAX_CHANNELS; i++) {
+ err = audmapp_chan_probe(pdev, audev, i);
+ if (err)
+ goto chan_probe_err;
+ }
+
+ err = dma_async_device_register(dma_dev);
+ if (err < 0)
+ goto chan_probe_err;
+
+ return err;
+
+chan_probe_err:
+ audmapp_chan_remove(audev);
+ shdma_cleanup(sdev);
+
+ return err;
+}
+
+static int audmapp_remove(struct platform_device *pdev)
+{
+ struct audmapp_device *audev = platform_get_drvdata(pdev);
+ struct dma_device *dma_dev = &audev->shdma_dev.dma_dev;
+
+ dma_async_device_unregister(dma_dev);
+
+ audmapp_chan_remove(audev);
+ shdma_cleanup(&audev->shdma_dev);
+
+ return 0;
+}
+
+static struct platform_driver audmapp_driver = {
+ .probe = audmapp_probe,
+ .remove = audmapp_remove,
+ .driver = {
+ .owner = THIS_MODULE,
+ .name = "rcar-audmapp-engine",
+ },
+};
+module_platform_driver(audmapp_driver);
+
+MODULE_AUTHOR("Kuninori Morimoto <[email protected]>");
+MODULE_DESCRIPTION("Renesas R-Car Audio DMAC peri-peri driver");
+MODULE_LICENSE("GPL");
diff --git a/include/linux/platform_data/dma-rcar-audmapp.h b/include/linux/platform_data/dma-rcar-audmapp.h
new file mode 100644
index 0000000..346df66
--- /dev/null
+++ b/include/linux/platform_data/dma-rcar-audmapp.h
@@ -0,0 +1,34 @@
+/*
+ * include/linux/sh_audma-pp.h
+ * This file is header file for Audio-DMAC-pp peripheral.
+ *
+ * Copyright (C) 2013 Renesas Electronics Corporation
+ *
+ * This file is based on the include/linux/sh_dma.h
+ *
+ * Header for the new SH dmaengine driver
+ *
+ * Copyright (C) 2010 Guennadi Liakhovetski <[email protected]>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#ifndef SH_AUDMAPP_H
+#define SH_AUDMAPP_H
+
+#include <linux/dmaengine.h>
+
+struct audmapp_slave_config {
+ int slave_id;
+ dma_addr_t src;
+ dma_addr_t dst;
+ u32 chcr;
+};
+
+struct audmapp_pdata {
+ struct audmapp_slave_config *slave;
+ int slave_num;
+};
+
+#endif /* SH_AUDMAPP_H */
--
1.7.9.5
Hi Morimoto-san,
On Fri, Jan 24, 2014 at 3:32 AM, Kuninori Morimoto
<[email protected]> wrote:
> --- a/drivers/dma/sh/Kconfig
> +++ b/drivers/dma/sh/Kconfig
> @@ -29,6 +29,12 @@ config RCAR_HPB_DMAE
> help
> Enable support for the Renesas R-Car series DMA controllers.
>
> +config RCAR_AUDMAC_PP
> + tristate "Renesas R-Car Audio DMAC Peripheral Peripheral support"
double "Peripheral"
> + depends on SH_DMAE_BASE
> + help
> + Enable support for the Renesas R-Car Audio DMAC Peripheral Peripheral controllers.
idem.
> --- /dev/null
> +++ b/drivers/dma/sh/rcar-audmapp.c
> @@ -0,0 +1,325 @@
> +static void audmapp_halt(struct shdma_chan *schan)
> +{
> + struct audmapp_chan *auchan = to_chan(schan);
> + int i;
unsigned int
> +
> + audmapp_write(auchan, 0, PDMACHCR);
> +
> + for(i = 0; i < 1024; i++) {
Missing space between "for" and "(" (have you run checkpatch.pl?)
What's a typical value of i when leaving the loop?
> + if (0 == audmapp_read(auchan, PDMACHCR))
> + return;
> + udelay(1);
> + }
> +}
> +
> +
> +static struct audmapp_slave_config *
> +audmapp_find_slave(struct audmapp_chan *auchan, int slave_id)
> +{
> + struct audmapp_device *audev = to_dev(auchan);
> + struct audmapp_pdata *pdata = audev->pdata;
> + struct audmapp_slave_config *cfg;
> + int i;
unsigned int
> +
> + if (slave_id >= AUDMAPP_SLAVE_NUMBER)
So slave_id should be unsigned int, too, and AUDMAPP_SLAVE_NUMBER
too ("29U").
> + return NULL;
> +
> + for (i = 0, cfg = pdata->slave; i < pdata->slave_num; i++, cfg++)
> + if (cfg->slave_id == slave_id)
> + return cfg;
> +
> + return NULL;
> +}
> +static int audmapp_desc_setup(struct shdma_chan *schan,
> + struct shdma_desc *sdecs,
> + dma_addr_t src, dma_addr_t dst, size_t *len)
> +{
> + struct audmapp_chan *auchan = to_chan(schan);
> + struct audmapp_slave_config *cfg = auchan->config;
> +
> + if (!cfg)
> + return -ENODEV;
> +
> + if (*len > (size_t)AUDMAPP_LEN_MAX)
I think you can get rid of the cast by adding a "U" suffix to one of
the constants in the definition of AUDMAPP_LEN_MAX.
> + *len = (size_t)AUDMAPP_LEN_MAX;
The cast is not needed (I think even without the change above).
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- [email protected]
In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds
Hi Geert
Thank you for your review
> > --- a/drivers/dma/sh/Kconfig
> > +++ b/drivers/dma/sh/Kconfig
> > @@ -29,6 +29,12 @@ config RCAR_HPB_DMAE
> > help
> > Enable support for the Renesas R-Car series DMA controllers.
> >
> > +config RCAR_AUDMAC_PP
> > + tristate "Renesas R-Car Audio DMAC Peripheral Peripheral support"
>
> double "Peripheral"
Unfortunately (?) "Audio DMAC Peripheral Peripheral"
(= double Peripheral) is the formal name
> > + for(i = 0; i < 1024; i++) {
>
> Missing space between "for" and "(" (have you run checkpatch.pl?)
>
> What's a typical value of i when leaving the loop?
Oops, this is my fault.
I will fix in v2
> > +static struct audmapp_slave_config *
> > +audmapp_find_slave(struct audmapp_chan *auchan, int slave_id)
> > +{
> > + struct audmapp_device *audev = to_dev(auchan);
> > + struct audmapp_pdata *pdata = audev->pdata;
> > + struct audmapp_slave_config *cfg;
> > + int i;
>
> unsigned int
>
> > +
> > + if (slave_id >= AUDMAPP_SLAVE_NUMBER)
>
> So slave_id should be unsigned int, too, and AUDMAPP_SLAVE_NUMBER
> too ("29U").
Hmm...
This driver is called from shdma-base.c.
And shdmac.c/sudmac.c/rcar-hpbdmac.c are same style.
1) this "slave_id" came from shdma_ops::set_slave
and, it is using "int"
2) above drivers have same xxx_find_slave(),
they are using "int".
(this driver is based on that)
What should I do ?
> > + if (*len > (size_t)AUDMAPP_LEN_MAX)
>
> I think you can get rid of the cast by adding a "U" suffix to one of
> the constants in the definition of AUDMAPP_LEN_MAX.
>
> > + *len = (size_t)AUDMAPP_LEN_MAX;
>
> The cast is not needed (I think even without the change above).
I will fixup these in v2
Thank you
Best regards
---
Kuninori Morimoto
Hi Morimoto-san,
On Fri, Jan 24, 2014 at 9:18 AM, Kuninori Morimoto
<[email protected]> wrote:
>> > + if (slave_id >= AUDMAPP_SLAVE_NUMBER)
>>
>> So slave_id should be unsigned int, too, and AUDMAPP_SLAVE_NUMBER
>> too ("29U").
>
> Hmm...
> This driver is called from shdma-base.c.
> And shdmac.c/sudmac.c/rcar-hpbdmac.c are same style.
>
> 1) this "slave_id" came from shdma_ops::set_slave
> and, it is using "int"
> 2) above drivers have same xxx_find_slave(),
> they are using "int".
> (this driver is based on that)
>
> What should I do ?
OK, then you should keep using int, and change the test to:
if (slave_id < 0 || slave_id >= AUDMAPP_SLAVE_NUMBER)
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- [email protected]
In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds
Hi Geert
> > This driver is called from shdma-base.c.
> > And shdmac.c/sudmac.c/rcar-hpbdmac.c are same style.
> >
> > 1) this "slave_id" came from shdma_ops::set_slave
> > and, it is using "int"
> > 2) above drivers have same xxx_find_slave(),
> > they are using "int".
> > (this driver is based on that)
> >
> > What should I do ?
>
> OK, then you should keep using int, and change the test to:
>
> if (slave_id < 0 || slave_id >= AUDMAPP_SLAVE_NUMBER)
I see
Thank you
Best regards
---
Kuninori Morimoto
From: Kuninori Morimoto <[email protected]>
Add support Audio DMAC peri peri driver
for Renesas R-Car Gen2 SoC, using 'shdma-base'
DMA driver framework.
Signed-off-by: Kuninori Morimoto <[email protected]>
---
v1 -> v2
- run scripts/checkpatch.pl
- ecchange length settings on audmapp_desc_setup()
- exchange slave_id check on audmapp_find_slave()
drivers/dma/sh/Kconfig | 6 +
drivers/dma/sh/Makefile | 1 +
drivers/dma/sh/rcar-audmapp.c | 325 ++++++++++++++++++++++++
include/linux/platform_data/dma-rcar-audmapp.h | 34 +++
4 files changed, 366 insertions(+)
create mode 100644 drivers/dma/sh/rcar-audmapp.c
create mode 100644 include/linux/platform_data/dma-rcar-audmapp.h
diff --git a/drivers/dma/sh/Kconfig b/drivers/dma/sh/Kconfig
index dadd9e01..b4c8138 100644
--- a/drivers/dma/sh/Kconfig
+++ b/drivers/dma/sh/Kconfig
@@ -29,6 +29,12 @@ config RCAR_HPB_DMAE
help
Enable support for the Renesas R-Car series DMA controllers.
+config RCAR_AUDMAC_PP
+ tristate "Renesas R-Car Audio DMAC Peripheral Peripheral support"
+ depends on SH_DMAE_BASE
+ help
+ Enable support for the Renesas R-Car Audio DMAC Peripheral Peripheral controllers.
+
config SHDMA_R8A73A4
def_bool y
depends on ARCH_R8A73A4 && SH_DMAE != n
diff --git a/drivers/dma/sh/Makefile b/drivers/dma/sh/Makefile
index e856af2..1ce88b2 100644
--- a/drivers/dma/sh/Makefile
+++ b/drivers/dma/sh/Makefile
@@ -7,3 +7,4 @@ endif
shdma-objs := $(shdma-y)
obj-$(CONFIG_SUDMAC) += sudmac.o
obj-$(CONFIG_RCAR_HPB_DMAE) += rcar-hpbdma.o
+obj-$(CONFIG_RCAR_AUDMAC_PP) += rcar-audmapp.o
diff --git a/drivers/dma/sh/rcar-audmapp.c b/drivers/dma/sh/rcar-audmapp.c
new file mode 100644
index 0000000..cd3c237
--- /dev/null
+++ b/drivers/dma/sh/rcar-audmapp.c
@@ -0,0 +1,325 @@
+/*
+ * drivers/dma/sh/rcar-audmapp.c
+ *
+ * Copyright (C) 2013 Renesas Electronics Corporation
+ * Copyright (C) 2013 Kuninori Morimoto <[email protected]>
+ *
+ * based on the drivers/dma/sh/shdma.c
+ *
+ * Copyright (C) 2011-2012 Guennadi Liakhovetski <[email protected]>
+ * Copyright (C) 2009 Nobuhiro Iwamatsu <[email protected]>
+ * 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 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.
+ *
+ */
+#include <linux/delay.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/dmaengine.h>
+#include <linux/platform_data/dma-rcar-audmapp.h>
+#include <linux/platform_device.h>
+#include <linux/shdma-base.h>
+
+/*
+ * DMA register
+ */
+#define PDMASAR 0x00
+#define PDMADAR 0x04
+#define PDMACHCR 0x0c
+
+/* PDMACHCR */
+#define PDMACHCR_DE (1 << 0)
+
+#define AUDMAPP_MAX_CHANNELS 29
+
+/* Default MEMCPY transfer size = 2^2 = 4 bytes */
+#define LOG2_DEFAULT_XFER_SIZE 2
+#define AUDMAPP_SLAVE_NUMBER 256
+#define AUDMAPP_LEN_MAX (16 * 1024 * 1024)
+
+struct audmapp_chan {
+ struct shdma_chan shdma_chan;
+ struct audmapp_slave_config *config;
+ void __iomem *base;
+};
+
+struct audmapp_device {
+ struct shdma_dev shdma_dev;
+ struct audmapp_pdata *pdata;
+ struct device *dev;
+ void __iomem *chan_reg;
+};
+
+#define to_chan(chan) container_of(chan, struct audmapp_chan, shdma_chan)
+#define to_dev(chan) container_of(chan->shdma_chan.dma_chan.device, \
+ struct audmapp_device, shdma_dev.dma_dev)
+
+static void audmapp_write(struct audmapp_chan *auchan, u32 data, u32 reg)
+{
+ struct audmapp_device *audev = to_dev(auchan);
+ struct device *dev = audev->dev;
+
+ dev_dbg(dev, "w %p : %08x\n", auchan->base + reg, data);
+
+ iowrite32(data, auchan->base + reg);
+}
+
+static u32 audmapp_read(struct audmapp_chan *auchan, u32 reg)
+{
+ return ioread32(auchan->base + reg);
+}
+
+static void audmapp_halt(struct shdma_chan *schan)
+{
+ struct audmapp_chan *auchan = to_chan(schan);
+ int i;
+
+ audmapp_write(auchan, 0, PDMACHCR);
+
+ for (i = 0; i < 1024; i++) {
+ if (0 == audmapp_read(auchan, PDMACHCR))
+ return;
+ udelay(1);
+ }
+}
+
+static void audmapp_start_xfer(struct shdma_chan *schan,
+ struct shdma_desc *sdecs)
+{
+ struct audmapp_chan *auchan = to_chan(schan);
+ struct audmapp_device *audev = to_dev(auchan);
+ struct audmapp_slave_config *cfg = auchan->config;
+ struct device *dev = audev->dev;
+ u32 chcr = cfg->chcr | PDMACHCR_DE;
+
+ dev_dbg(dev, "src/dst/chcr = %x/%x/%x\n",
+ cfg->src, cfg->dst, cfg->chcr);
+
+ audmapp_write(auchan, cfg->src, PDMASAR);
+ audmapp_write(auchan, cfg->dst, PDMADAR);
+ audmapp_write(auchan, chcr, PDMACHCR);
+}
+
+static struct audmapp_slave_config *
+audmapp_find_slave(struct audmapp_chan *auchan, int slave_id)
+{
+ struct audmapp_device *audev = to_dev(auchan);
+ struct audmapp_pdata *pdata = audev->pdata;
+ struct audmapp_slave_config *cfg;
+ int i;
+
+ if (slave_id < 0 || slave_id >= AUDMAPP_SLAVE_NUMBER)
+ return NULL;
+
+ for (i = 0, cfg = pdata->slave; i < pdata->slave_num; i++, cfg++)
+ if (cfg->slave_id == slave_id)
+ return cfg;
+
+ return NULL;
+}
+
+static int audmapp_set_slave(struct shdma_chan *schan, int slave_id,
+ dma_addr_t slave_addr, bool try)
+{
+ struct audmapp_chan *auchan = to_chan(schan);
+ struct audmapp_slave_config *cfg =
+ audmapp_find_slave(auchan, slave_id);
+
+ if (!cfg)
+ return -ENODEV;
+ if (try)
+ return 0;
+
+ auchan->config = cfg;
+
+ return 0;
+}
+
+static int audmapp_desc_setup(struct shdma_chan *schan,
+ struct shdma_desc *sdecs,
+ dma_addr_t src, dma_addr_t dst, size_t *len)
+{
+ struct audmapp_chan *auchan = to_chan(schan);
+ struct audmapp_slave_config *cfg = auchan->config;
+
+ if (!cfg)
+ return -ENODEV;
+
+ if (*len > schan->max_xfer_len)
+ *len = schan->max_xfer_len;
+
+ return 0;
+}
+
+static void audmapp_setup_xfer(struct shdma_chan *schan,
+ int slave_id)
+{
+}
+
+static dma_addr_t audmapp_slave_addr(struct shdma_chan *schan)
+{
+ return 0; /* always fixed address */
+}
+
+static bool audmapp_channel_busy(struct shdma_chan *schan)
+{
+ struct audmapp_chan *auchan = to_chan(schan);
+ u32 chcr = audmapp_read(auchan, PDMACHCR);
+
+ return chcr & ~PDMACHCR_DE;
+}
+
+static bool audmapp_desc_completed(struct shdma_chan *schan,
+ struct shdma_desc *sdesc)
+{
+ return true;
+}
+
+static struct shdma_desc *audmapp_embedded_desc(void *buf, int i)
+{
+ return &((struct shdma_desc *)buf)[i];
+}
+
+static const struct shdma_ops audmapp_shdma_ops = {
+ .halt_channel = audmapp_halt,
+ .desc_setup = audmapp_desc_setup,
+ .set_slave = audmapp_set_slave,
+ .start_xfer = audmapp_start_xfer,
+ .embedded_desc = audmapp_embedded_desc,
+ .setup_xfer = audmapp_setup_xfer,
+ .slave_addr = audmapp_slave_addr,
+ .channel_busy = audmapp_channel_busy,
+ .desc_completed = audmapp_desc_completed,
+};
+
+static int audmapp_chan_probe(struct platform_device *pdev,
+ struct audmapp_device *audev, int id)
+{
+ struct shdma_dev *sdev = &audev->shdma_dev;
+ struct audmapp_chan *auchan;
+ struct shdma_chan *schan;
+ struct device *dev = audev->dev;
+
+ auchan = devm_kzalloc(dev, sizeof(struct audmapp_chan), GFP_KERNEL);
+ if (!auchan) {
+ dev_err(dev, "No free memory for allocating dma channels!\n");
+ return -ENOMEM;
+ }
+
+ schan = &auchan->shdma_chan;
+ schan->max_xfer_len = AUDMAPP_LEN_MAX;
+
+ shdma_chan_probe(sdev, schan, id);
+
+ auchan->base = audev->chan_reg + 0x20 + (0x10 * id);
+ dev_dbg(dev, "%02d : %p / %p", id, auchan->base, audev->chan_reg);
+
+ return 0;
+}
+
+static void audmapp_chan_remove(struct audmapp_device *audev)
+{
+ struct dma_device *dma_dev = &audev->shdma_dev.dma_dev;
+ struct shdma_chan *schan;
+ int i;
+
+ shdma_for_each_chan(schan, &audev->shdma_dev, i) {
+ BUG_ON(!schan);
+ shdma_chan_remove(schan);
+ }
+ dma_dev->chancnt = 0;
+}
+
+static int audmapp_probe(struct platform_device *pdev)
+{
+ struct audmapp_pdata *pdata = pdev->dev.platform_data;
+ struct audmapp_device *audev;
+ struct shdma_dev *sdev;
+ struct dma_device *dma_dev;
+ struct resource *res;
+ int err, i;
+
+ if (!pdata)
+ return -ENODEV;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+
+ audev = devm_kzalloc(&pdev->dev, sizeof(struct audmapp_device),
+ GFP_KERNEL);
+ if (!audev) {
+ dev_err(&pdev->dev, "Not enough memory\n");
+ return -ENOMEM;
+ }
+
+ audev->dev = &pdev->dev;
+ audev->pdata = pdata;
+ audev->chan_reg = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(audev->chan_reg))
+ return PTR_ERR(audev->chan_reg);
+
+ sdev = &audev->shdma_dev;
+ sdev->ops = &audmapp_shdma_ops;
+ sdev->desc_size = sizeof(struct shdma_desc);
+
+ dma_dev = &sdev->dma_dev;
+ dma_dev->copy_align = LOG2_DEFAULT_XFER_SIZE;
+ dma_cap_set(DMA_SLAVE, dma_dev->cap_mask);
+
+ err = shdma_init(&pdev->dev, sdev, AUDMAPP_MAX_CHANNELS);
+ if (err < 0)
+ return err;
+
+ platform_set_drvdata(pdev, audev);
+
+ /* Create DMA Channel */
+ for (i = 0; i < AUDMAPP_MAX_CHANNELS; i++) {
+ err = audmapp_chan_probe(pdev, audev, i);
+ if (err)
+ goto chan_probe_err;
+ }
+
+ err = dma_async_device_register(dma_dev);
+ if (err < 0)
+ goto chan_probe_err;
+
+ return err;
+
+chan_probe_err:
+ audmapp_chan_remove(audev);
+ shdma_cleanup(sdev);
+
+ return err;
+}
+
+static int audmapp_remove(struct platform_device *pdev)
+{
+ struct audmapp_device *audev = platform_get_drvdata(pdev);
+ struct dma_device *dma_dev = &audev->shdma_dev.dma_dev;
+
+ dma_async_device_unregister(dma_dev);
+
+ audmapp_chan_remove(audev);
+ shdma_cleanup(&audev->shdma_dev);
+
+ return 0;
+}
+
+static struct platform_driver audmapp_driver = {
+ .probe = audmapp_probe,
+ .remove = audmapp_remove,
+ .driver = {
+ .owner = THIS_MODULE,
+ .name = "rcar-audmapp-engine",
+ },
+};
+module_platform_driver(audmapp_driver);
+
+MODULE_AUTHOR("Kuninori Morimoto <[email protected]>");
+MODULE_DESCRIPTION("Renesas R-Car Audio DMAC peri-peri driver");
+MODULE_LICENSE("GPL");
diff --git a/include/linux/platform_data/dma-rcar-audmapp.h b/include/linux/platform_data/dma-rcar-audmapp.h
new file mode 100644
index 0000000..346df66
--- /dev/null
+++ b/include/linux/platform_data/dma-rcar-audmapp.h
@@ -0,0 +1,34 @@
+/*
+ * include/linux/sh_audma-pp.h
+ * This file is header file for Audio-DMAC-pp peripheral.
+ *
+ * Copyright (C) 2013 Renesas Electronics Corporation
+ *
+ * This file is based on the include/linux/sh_dma.h
+ *
+ * Header for the new SH dmaengine driver
+ *
+ * Copyright (C) 2010 Guennadi Liakhovetski <[email protected]>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#ifndef SH_AUDMAPP_H
+#define SH_AUDMAPP_H
+
+#include <linux/dmaengine.h>
+
+struct audmapp_slave_config {
+ int slave_id;
+ dma_addr_t src;
+ dma_addr_t dst;
+ u32 chcr;
+};
+
+struct audmapp_pdata {
+ struct audmapp_slave_config *slave;
+ int slave_num;
+};
+
+#endif /* SH_AUDMAPP_H */
--
1.7.9.5
Hi Vinod
Can I ask you about current status of this patch ?
> From: Kuninori Morimoto <[email protected]>
>
> Add support Audio DMAC peri peri driver
> for Renesas R-Car Gen2 SoC, using 'shdma-base'
> DMA driver framework.
>
> Signed-off-by: Kuninori Morimoto <[email protected]>
> ---
> v1 -> v2
>
> - run scripts/checkpatch.pl
> - ecchange length settings on audmapp_desc_setup()
> - exchange slave_id check on audmapp_find_slave()
>
> drivers/dma/sh/Kconfig | 6 +
> drivers/dma/sh/Makefile | 1 +
> drivers/dma/sh/rcar-audmapp.c | 325 ++++++++++++++++++++++++
> include/linux/platform_data/dma-rcar-audmapp.h | 34 +++
> 4 files changed, 366 insertions(+)
> create mode 100644 drivers/dma/sh/rcar-audmapp.c
> create mode 100644 include/linux/platform_data/dma-rcar-audmapp.h
>
> diff --git a/drivers/dma/sh/Kconfig b/drivers/dma/sh/Kconfig
> index dadd9e01..b4c8138 100644
> --- a/drivers/dma/sh/Kconfig
> +++ b/drivers/dma/sh/Kconfig
> @@ -29,6 +29,12 @@ config RCAR_HPB_DMAE
> help
> Enable support for the Renesas R-Car series DMA controllers.
>
> +config RCAR_AUDMAC_PP
> + tristate "Renesas R-Car Audio DMAC Peripheral Peripheral support"
> + depends on SH_DMAE_BASE
> + help
> + Enable support for the Renesas R-Car Audio DMAC Peripheral Peripheral controllers.
> +
> config SHDMA_R8A73A4
> def_bool y
> depends on ARCH_R8A73A4 && SH_DMAE != n
> diff --git a/drivers/dma/sh/Makefile b/drivers/dma/sh/Makefile
> index e856af2..1ce88b2 100644
> --- a/drivers/dma/sh/Makefile
> +++ b/drivers/dma/sh/Makefile
> @@ -7,3 +7,4 @@ endif
> shdma-objs := $(shdma-y)
> obj-$(CONFIG_SUDMAC) += sudmac.o
> obj-$(CONFIG_RCAR_HPB_DMAE) += rcar-hpbdma.o
> +obj-$(CONFIG_RCAR_AUDMAC_PP) += rcar-audmapp.o
> diff --git a/drivers/dma/sh/rcar-audmapp.c b/drivers/dma/sh/rcar-audmapp.c
> new file mode 100644
> index 0000000..cd3c237
> --- /dev/null
> +++ b/drivers/dma/sh/rcar-audmapp.c
> @@ -0,0 +1,325 @@
> +/*
> + * drivers/dma/sh/rcar-audmapp.c
> + *
> + * Copyright (C) 2013 Renesas Electronics Corporation
> + * Copyright (C) 2013 Kuninori Morimoto <[email protected]>
> + *
> + * based on the drivers/dma/sh/shdma.c
> + *
> + * Copyright (C) 2011-2012 Guennadi Liakhovetski <[email protected]>
> + * Copyright (C) 2009 Nobuhiro Iwamatsu <[email protected]>
> + * 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 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.
> + *
> + */
> +#include <linux/delay.h>
> +#include <linux/init.h>
> +#include <linux/module.h>
> +#include <linux/slab.h>
> +#include <linux/dmaengine.h>
> +#include <linux/platform_data/dma-rcar-audmapp.h>
> +#include <linux/platform_device.h>
> +#include <linux/shdma-base.h>
> +
> +/*
> + * DMA register
> + */
> +#define PDMASAR 0x00
> +#define PDMADAR 0x04
> +#define PDMACHCR 0x0c
> +
> +/* PDMACHCR */
> +#define PDMACHCR_DE (1 << 0)
> +
> +#define AUDMAPP_MAX_CHANNELS 29
> +
> +/* Default MEMCPY transfer size = 2^2 = 4 bytes */
> +#define LOG2_DEFAULT_XFER_SIZE 2
> +#define AUDMAPP_SLAVE_NUMBER 256
> +#define AUDMAPP_LEN_MAX (16 * 1024 * 1024)
> +
> +struct audmapp_chan {
> + struct shdma_chan shdma_chan;
> + struct audmapp_slave_config *config;
> + void __iomem *base;
> +};
> +
> +struct audmapp_device {
> + struct shdma_dev shdma_dev;
> + struct audmapp_pdata *pdata;
> + struct device *dev;
> + void __iomem *chan_reg;
> +};
> +
> +#define to_chan(chan) container_of(chan, struct audmapp_chan, shdma_chan)
> +#define to_dev(chan) container_of(chan->shdma_chan.dma_chan.device, \
> + struct audmapp_device, shdma_dev.dma_dev)
> +
> +static void audmapp_write(struct audmapp_chan *auchan, u32 data, u32 reg)
> +{
> + struct audmapp_device *audev = to_dev(auchan);
> + struct device *dev = audev->dev;
> +
> + dev_dbg(dev, "w %p : %08x\n", auchan->base + reg, data);
> +
> + iowrite32(data, auchan->base + reg);
> +}
> +
> +static u32 audmapp_read(struct audmapp_chan *auchan, u32 reg)
> +{
> + return ioread32(auchan->base + reg);
> +}
> +
> +static void audmapp_halt(struct shdma_chan *schan)
> +{
> + struct audmapp_chan *auchan = to_chan(schan);
> + int i;
> +
> + audmapp_write(auchan, 0, PDMACHCR);
> +
> + for (i = 0; i < 1024; i++) {
> + if (0 == audmapp_read(auchan, PDMACHCR))
> + return;
> + udelay(1);
> + }
> +}
> +
> +static void audmapp_start_xfer(struct shdma_chan *schan,
> + struct shdma_desc *sdecs)
> +{
> + struct audmapp_chan *auchan = to_chan(schan);
> + struct audmapp_device *audev = to_dev(auchan);
> + struct audmapp_slave_config *cfg = auchan->config;
> + struct device *dev = audev->dev;
> + u32 chcr = cfg->chcr | PDMACHCR_DE;
> +
> + dev_dbg(dev, "src/dst/chcr = %x/%x/%x\n",
> + cfg->src, cfg->dst, cfg->chcr);
> +
> + audmapp_write(auchan, cfg->src, PDMASAR);
> + audmapp_write(auchan, cfg->dst, PDMADAR);
> + audmapp_write(auchan, chcr, PDMACHCR);
> +}
> +
> +static struct audmapp_slave_config *
> +audmapp_find_slave(struct audmapp_chan *auchan, int slave_id)
> +{
> + struct audmapp_device *audev = to_dev(auchan);
> + struct audmapp_pdata *pdata = audev->pdata;
> + struct audmapp_slave_config *cfg;
> + int i;
> +
> + if (slave_id < 0 || slave_id >= AUDMAPP_SLAVE_NUMBER)
> + return NULL;
> +
> + for (i = 0, cfg = pdata->slave; i < pdata->slave_num; i++, cfg++)
> + if (cfg->slave_id == slave_id)
> + return cfg;
> +
> + return NULL;
> +}
> +
> +static int audmapp_set_slave(struct shdma_chan *schan, int slave_id,
> + dma_addr_t slave_addr, bool try)
> +{
> + struct audmapp_chan *auchan = to_chan(schan);
> + struct audmapp_slave_config *cfg =
> + audmapp_find_slave(auchan, slave_id);
> +
> + if (!cfg)
> + return -ENODEV;
> + if (try)
> + return 0;
> +
> + auchan->config = cfg;
> +
> + return 0;
> +}
> +
> +static int audmapp_desc_setup(struct shdma_chan *schan,
> + struct shdma_desc *sdecs,
> + dma_addr_t src, dma_addr_t dst, size_t *len)
> +{
> + struct audmapp_chan *auchan = to_chan(schan);
> + struct audmapp_slave_config *cfg = auchan->config;
> +
> + if (!cfg)
> + return -ENODEV;
> +
> + if (*len > schan->max_xfer_len)
> + *len = schan->max_xfer_len;
> +
> + return 0;
> +}
> +
> +static void audmapp_setup_xfer(struct shdma_chan *schan,
> + int slave_id)
> +{
> +}
> +
> +static dma_addr_t audmapp_slave_addr(struct shdma_chan *schan)
> +{
> + return 0; /* always fixed address */
> +}
> +
> +static bool audmapp_channel_busy(struct shdma_chan *schan)
> +{
> + struct audmapp_chan *auchan = to_chan(schan);
> + u32 chcr = audmapp_read(auchan, PDMACHCR);
> +
> + return chcr & ~PDMACHCR_DE;
> +}
> +
> +static bool audmapp_desc_completed(struct shdma_chan *schan,
> + struct shdma_desc *sdesc)
> +{
> + return true;
> +}
> +
> +static struct shdma_desc *audmapp_embedded_desc(void *buf, int i)
> +{
> + return &((struct shdma_desc *)buf)[i];
> +}
> +
> +static const struct shdma_ops audmapp_shdma_ops = {
> + .halt_channel = audmapp_halt,
> + .desc_setup = audmapp_desc_setup,
> + .set_slave = audmapp_set_slave,
> + .start_xfer = audmapp_start_xfer,
> + .embedded_desc = audmapp_embedded_desc,
> + .setup_xfer = audmapp_setup_xfer,
> + .slave_addr = audmapp_slave_addr,
> + .channel_busy = audmapp_channel_busy,
> + .desc_completed = audmapp_desc_completed,
> +};
> +
> +static int audmapp_chan_probe(struct platform_device *pdev,
> + struct audmapp_device *audev, int id)
> +{
> + struct shdma_dev *sdev = &audev->shdma_dev;
> + struct audmapp_chan *auchan;
> + struct shdma_chan *schan;
> + struct device *dev = audev->dev;
> +
> + auchan = devm_kzalloc(dev, sizeof(struct audmapp_chan), GFP_KERNEL);
> + if (!auchan) {
> + dev_err(dev, "No free memory for allocating dma channels!\n");
> + return -ENOMEM;
> + }
> +
> + schan = &auchan->shdma_chan;
> + schan->max_xfer_len = AUDMAPP_LEN_MAX;
> +
> + shdma_chan_probe(sdev, schan, id);
> +
> + auchan->base = audev->chan_reg + 0x20 + (0x10 * id);
> + dev_dbg(dev, "%02d : %p / %p", id, auchan->base, audev->chan_reg);
> +
> + return 0;
> +}
> +
> +static void audmapp_chan_remove(struct audmapp_device *audev)
> +{
> + struct dma_device *dma_dev = &audev->shdma_dev.dma_dev;
> + struct shdma_chan *schan;
> + int i;
> +
> + shdma_for_each_chan(schan, &audev->shdma_dev, i) {
> + BUG_ON(!schan);
> + shdma_chan_remove(schan);
> + }
> + dma_dev->chancnt = 0;
> +}
> +
> +static int audmapp_probe(struct platform_device *pdev)
> +{
> + struct audmapp_pdata *pdata = pdev->dev.platform_data;
> + struct audmapp_device *audev;
> + struct shdma_dev *sdev;
> + struct dma_device *dma_dev;
> + struct resource *res;
> + int err, i;
> +
> + if (!pdata)
> + return -ENODEV;
> +
> + res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> +
> + audev = devm_kzalloc(&pdev->dev, sizeof(struct audmapp_device),
> + GFP_KERNEL);
> + if (!audev) {
> + dev_err(&pdev->dev, "Not enough memory\n");
> + return -ENOMEM;
> + }
> +
> + audev->dev = &pdev->dev;
> + audev->pdata = pdata;
> + audev->chan_reg = devm_ioremap_resource(&pdev->dev, res);
> + if (IS_ERR(audev->chan_reg))
> + return PTR_ERR(audev->chan_reg);
> +
> + sdev = &audev->shdma_dev;
> + sdev->ops = &audmapp_shdma_ops;
> + sdev->desc_size = sizeof(struct shdma_desc);
> +
> + dma_dev = &sdev->dma_dev;
> + dma_dev->copy_align = LOG2_DEFAULT_XFER_SIZE;
> + dma_cap_set(DMA_SLAVE, dma_dev->cap_mask);
> +
> + err = shdma_init(&pdev->dev, sdev, AUDMAPP_MAX_CHANNELS);
> + if (err < 0)
> + return err;
> +
> + platform_set_drvdata(pdev, audev);
> +
> + /* Create DMA Channel */
> + for (i = 0; i < AUDMAPP_MAX_CHANNELS; i++) {
> + err = audmapp_chan_probe(pdev, audev, i);
> + if (err)
> + goto chan_probe_err;
> + }
> +
> + err = dma_async_device_register(dma_dev);
> + if (err < 0)
> + goto chan_probe_err;
> +
> + return err;
> +
> +chan_probe_err:
> + audmapp_chan_remove(audev);
> + shdma_cleanup(sdev);
> +
> + return err;
> +}
> +
> +static int audmapp_remove(struct platform_device *pdev)
> +{
> + struct audmapp_device *audev = platform_get_drvdata(pdev);
> + struct dma_device *dma_dev = &audev->shdma_dev.dma_dev;
> +
> + dma_async_device_unregister(dma_dev);
> +
> + audmapp_chan_remove(audev);
> + shdma_cleanup(&audev->shdma_dev);
> +
> + return 0;
> +}
> +
> +static struct platform_driver audmapp_driver = {
> + .probe = audmapp_probe,
> + .remove = audmapp_remove,
> + .driver = {
> + .owner = THIS_MODULE,
> + .name = "rcar-audmapp-engine",
> + },
> +};
> +module_platform_driver(audmapp_driver);
> +
> +MODULE_AUTHOR("Kuninori Morimoto <[email protected]>");
> +MODULE_DESCRIPTION("Renesas R-Car Audio DMAC peri-peri driver");
> +MODULE_LICENSE("GPL");
> diff --git a/include/linux/platform_data/dma-rcar-audmapp.h b/include/linux/platform_data/dma-rcar-audmapp.h
> new file mode 100644
> index 0000000..346df66
> --- /dev/null
> +++ b/include/linux/platform_data/dma-rcar-audmapp.h
> @@ -0,0 +1,34 @@
> +/*
> + * include/linux/sh_audma-pp.h
> + * This file is header file for Audio-DMAC-pp peripheral.
> + *
> + * Copyright (C) 2013 Renesas Electronics Corporation
> + *
> + * This file is based on the include/linux/sh_dma.h
> + *
> + * Header for the new SH dmaengine driver
> + *
> + * Copyright (C) 2010 Guennadi Liakhovetski <[email protected]>
> + *
> + * This program is free software; you can redistribute it and/or modify
> + * it under the terms of the GNU General Public License version 2 as
> + * published by the Free Software Foundation.
> + */
> +#ifndef SH_AUDMAPP_H
> +#define SH_AUDMAPP_H
> +
> +#include <linux/dmaengine.h>
> +
> +struct audmapp_slave_config {
> + int slave_id;
> + dma_addr_t src;
> + dma_addr_t dst;
> + u32 chcr;
> +};
> +
> +struct audmapp_pdata {
> + struct audmapp_slave_config *slave;
> + int slave_num;
> +};
> +
> +#endif /* SH_AUDMAPP_H */
> --
> 1.7.9.5
>
Hi Vinod, Linux-kernel ML
ping ?
> Can I ask you about current status of this patch ?
>
> > From: Kuninori Morimoto <[email protected]>
> >
> > Add support Audio DMAC peri peri driver
> > for Renesas R-Car Gen2 SoC, using 'shdma-base'
> > DMA driver framework.
> >
> > Signed-off-by: Kuninori Morimoto <[email protected]>
> > ---
> > v1 -> v2
> >
> > - run scripts/checkpatch.pl
> > - ecchange length settings on audmapp_desc_setup()
> > - exchange slave_id check on audmapp_find_slave()
> >
> > drivers/dma/sh/Kconfig | 6 +
> > drivers/dma/sh/Makefile | 1 +
> > drivers/dma/sh/rcar-audmapp.c | 325 ++++++++++++++++++++++++
> > include/linux/platform_data/dma-rcar-audmapp.h | 34 +++
> > 4 files changed, 366 insertions(+)
> > create mode 100644 drivers/dma/sh/rcar-audmapp.c
> > create mode 100644 include/linux/platform_data/dma-rcar-audmapp.h
> >
> > diff --git a/drivers/dma/sh/Kconfig b/drivers/dma/sh/Kconfig
> > index dadd9e01..b4c8138 100644
> > --- a/drivers/dma/sh/Kconfig
> > +++ b/drivers/dma/sh/Kconfig
> > @@ -29,6 +29,12 @@ config RCAR_HPB_DMAE
> > help
> > Enable support for the Renesas R-Car series DMA controllers.
> >
> > +config RCAR_AUDMAC_PP
> > + tristate "Renesas R-Car Audio DMAC Peripheral Peripheral support"
> > + depends on SH_DMAE_BASE
> > + help
> > + Enable support for the Renesas R-Car Audio DMAC Peripheral Peripheral controllers.
> > +
> > config SHDMA_R8A73A4
> > def_bool y
> > depends on ARCH_R8A73A4 && SH_DMAE != n
> > diff --git a/drivers/dma/sh/Makefile b/drivers/dma/sh/Makefile
> > index e856af2..1ce88b2 100644
> > --- a/drivers/dma/sh/Makefile
> > +++ b/drivers/dma/sh/Makefile
> > @@ -7,3 +7,4 @@ endif
> > shdma-objs := $(shdma-y)
> > obj-$(CONFIG_SUDMAC) += sudmac.o
> > obj-$(CONFIG_RCAR_HPB_DMAE) += rcar-hpbdma.o
> > +obj-$(CONFIG_RCAR_AUDMAC_PP) += rcar-audmapp.o
> > diff --git a/drivers/dma/sh/rcar-audmapp.c b/drivers/dma/sh/rcar-audmapp.c
> > new file mode 100644
> > index 0000000..cd3c237
> > --- /dev/null
> > +++ b/drivers/dma/sh/rcar-audmapp.c
> > @@ -0,0 +1,325 @@
> > +/*
> > + * drivers/dma/sh/rcar-audmapp.c
> > + *
> > + * Copyright (C) 2013 Renesas Electronics Corporation
> > + * Copyright (C) 2013 Kuninori Morimoto <[email protected]>
> > + *
> > + * based on the drivers/dma/sh/shdma.c
> > + *
> > + * Copyright (C) 2011-2012 Guennadi Liakhovetski <[email protected]>
> > + * Copyright (C) 2009 Nobuhiro Iwamatsu <[email protected]>
> > + * 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 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.
> > + *
> > + */
> > +#include <linux/delay.h>
> > +#include <linux/init.h>
> > +#include <linux/module.h>
> > +#include <linux/slab.h>
> > +#include <linux/dmaengine.h>
> > +#include <linux/platform_data/dma-rcar-audmapp.h>
> > +#include <linux/platform_device.h>
> > +#include <linux/shdma-base.h>
> > +
> > +/*
> > + * DMA register
> > + */
> > +#define PDMASAR 0x00
> > +#define PDMADAR 0x04
> > +#define PDMACHCR 0x0c
> > +
> > +/* PDMACHCR */
> > +#define PDMACHCR_DE (1 << 0)
> > +
> > +#define AUDMAPP_MAX_CHANNELS 29
> > +
> > +/* Default MEMCPY transfer size = 2^2 = 4 bytes */
> > +#define LOG2_DEFAULT_XFER_SIZE 2
> > +#define AUDMAPP_SLAVE_NUMBER 256
> > +#define AUDMAPP_LEN_MAX (16 * 1024 * 1024)
> > +
> > +struct audmapp_chan {
> > + struct shdma_chan shdma_chan;
> > + struct audmapp_slave_config *config;
> > + void __iomem *base;
> > +};
> > +
> > +struct audmapp_device {
> > + struct shdma_dev shdma_dev;
> > + struct audmapp_pdata *pdata;
> > + struct device *dev;
> > + void __iomem *chan_reg;
> > +};
> > +
> > +#define to_chan(chan) container_of(chan, struct audmapp_chan, shdma_chan)
> > +#define to_dev(chan) container_of(chan->shdma_chan.dma_chan.device, \
> > + struct audmapp_device, shdma_dev.dma_dev)
> > +
> > +static void audmapp_write(struct audmapp_chan *auchan, u32 data, u32 reg)
> > +{
> > + struct audmapp_device *audev = to_dev(auchan);
> > + struct device *dev = audev->dev;
> > +
> > + dev_dbg(dev, "w %p : %08x\n", auchan->base + reg, data);
> > +
> > + iowrite32(data, auchan->base + reg);
> > +}
> > +
> > +static u32 audmapp_read(struct audmapp_chan *auchan, u32 reg)
> > +{
> > + return ioread32(auchan->base + reg);
> > +}
> > +
> > +static void audmapp_halt(struct shdma_chan *schan)
> > +{
> > + struct audmapp_chan *auchan = to_chan(schan);
> > + int i;
> > +
> > + audmapp_write(auchan, 0, PDMACHCR);
> > +
> > + for (i = 0; i < 1024; i++) {
> > + if (0 == audmapp_read(auchan, PDMACHCR))
> > + return;
> > + udelay(1);
> > + }
> > +}
> > +
> > +static void audmapp_start_xfer(struct shdma_chan *schan,
> > + struct shdma_desc *sdecs)
> > +{
> > + struct audmapp_chan *auchan = to_chan(schan);
> > + struct audmapp_device *audev = to_dev(auchan);
> > + struct audmapp_slave_config *cfg = auchan->config;
> > + struct device *dev = audev->dev;
> > + u32 chcr = cfg->chcr | PDMACHCR_DE;
> > +
> > + dev_dbg(dev, "src/dst/chcr = %x/%x/%x\n",
> > + cfg->src, cfg->dst, cfg->chcr);
> > +
> > + audmapp_write(auchan, cfg->src, PDMASAR);
> > + audmapp_write(auchan, cfg->dst, PDMADAR);
> > + audmapp_write(auchan, chcr, PDMACHCR);
> > +}
> > +
> > +static struct audmapp_slave_config *
> > +audmapp_find_slave(struct audmapp_chan *auchan, int slave_id)
> > +{
> > + struct audmapp_device *audev = to_dev(auchan);
> > + struct audmapp_pdata *pdata = audev->pdata;
> > + struct audmapp_slave_config *cfg;
> > + int i;
> > +
> > + if (slave_id < 0 || slave_id >= AUDMAPP_SLAVE_NUMBER)
> > + return NULL;
> > +
> > + for (i = 0, cfg = pdata->slave; i < pdata->slave_num; i++, cfg++)
> > + if (cfg->slave_id == slave_id)
> > + return cfg;
> > +
> > + return NULL;
> > +}
> > +
> > +static int audmapp_set_slave(struct shdma_chan *schan, int slave_id,
> > + dma_addr_t slave_addr, bool try)
> > +{
> > + struct audmapp_chan *auchan = to_chan(schan);
> > + struct audmapp_slave_config *cfg =
> > + audmapp_find_slave(auchan, slave_id);
> > +
> > + if (!cfg)
> > + return -ENODEV;
> > + if (try)
> > + return 0;
> > +
> > + auchan->config = cfg;
> > +
> > + return 0;
> > +}
> > +
> > +static int audmapp_desc_setup(struct shdma_chan *schan,
> > + struct shdma_desc *sdecs,
> > + dma_addr_t src, dma_addr_t dst, size_t *len)
> > +{
> > + struct audmapp_chan *auchan = to_chan(schan);
> > + struct audmapp_slave_config *cfg = auchan->config;
> > +
> > + if (!cfg)
> > + return -ENODEV;
> > +
> > + if (*len > schan->max_xfer_len)
> > + *len = schan->max_xfer_len;
> > +
> > + return 0;
> > +}
> > +
> > +static void audmapp_setup_xfer(struct shdma_chan *schan,
> > + int slave_id)
> > +{
> > +}
> > +
> > +static dma_addr_t audmapp_slave_addr(struct shdma_chan *schan)
> > +{
> > + return 0; /* always fixed address */
> > +}
> > +
> > +static bool audmapp_channel_busy(struct shdma_chan *schan)
> > +{
> > + struct audmapp_chan *auchan = to_chan(schan);
> > + u32 chcr = audmapp_read(auchan, PDMACHCR);
> > +
> > + return chcr & ~PDMACHCR_DE;
> > +}
> > +
> > +static bool audmapp_desc_completed(struct shdma_chan *schan,
> > + struct shdma_desc *sdesc)
> > +{
> > + return true;
> > +}
> > +
> > +static struct shdma_desc *audmapp_embedded_desc(void *buf, int i)
> > +{
> > + return &((struct shdma_desc *)buf)[i];
> > +}
> > +
> > +static const struct shdma_ops audmapp_shdma_ops = {
> > + .halt_channel = audmapp_halt,
> > + .desc_setup = audmapp_desc_setup,
> > + .set_slave = audmapp_set_slave,
> > + .start_xfer = audmapp_start_xfer,
> > + .embedded_desc = audmapp_embedded_desc,
> > + .setup_xfer = audmapp_setup_xfer,
> > + .slave_addr = audmapp_slave_addr,
> > + .channel_busy = audmapp_channel_busy,
> > + .desc_completed = audmapp_desc_completed,
> > +};
> > +
> > +static int audmapp_chan_probe(struct platform_device *pdev,
> > + struct audmapp_device *audev, int id)
> > +{
> > + struct shdma_dev *sdev = &audev->shdma_dev;
> > + struct audmapp_chan *auchan;
> > + struct shdma_chan *schan;
> > + struct device *dev = audev->dev;
> > +
> > + auchan = devm_kzalloc(dev, sizeof(struct audmapp_chan), GFP_KERNEL);
> > + if (!auchan) {
> > + dev_err(dev, "No free memory for allocating dma channels!\n");
> > + return -ENOMEM;
> > + }
> > +
> > + schan = &auchan->shdma_chan;
> > + schan->max_xfer_len = AUDMAPP_LEN_MAX;
> > +
> > + shdma_chan_probe(sdev, schan, id);
> > +
> > + auchan->base = audev->chan_reg + 0x20 + (0x10 * id);
> > + dev_dbg(dev, "%02d : %p / %p", id, auchan->base, audev->chan_reg);
> > +
> > + return 0;
> > +}
> > +
> > +static void audmapp_chan_remove(struct audmapp_device *audev)
> > +{
> > + struct dma_device *dma_dev = &audev->shdma_dev.dma_dev;
> > + struct shdma_chan *schan;
> > + int i;
> > +
> > + shdma_for_each_chan(schan, &audev->shdma_dev, i) {
> > + BUG_ON(!schan);
> > + shdma_chan_remove(schan);
> > + }
> > + dma_dev->chancnt = 0;
> > +}
> > +
> > +static int audmapp_probe(struct platform_device *pdev)
> > +{
> > + struct audmapp_pdata *pdata = pdev->dev.platform_data;
> > + struct audmapp_device *audev;
> > + struct shdma_dev *sdev;
> > + struct dma_device *dma_dev;
> > + struct resource *res;
> > + int err, i;
> > +
> > + if (!pdata)
> > + return -ENODEV;
> > +
> > + res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> > +
> > + audev = devm_kzalloc(&pdev->dev, sizeof(struct audmapp_device),
> > + GFP_KERNEL);
> > + if (!audev) {
> > + dev_err(&pdev->dev, "Not enough memory\n");
> > + return -ENOMEM;
> > + }
> > +
> > + audev->dev = &pdev->dev;
> > + audev->pdata = pdata;
> > + audev->chan_reg = devm_ioremap_resource(&pdev->dev, res);
> > + if (IS_ERR(audev->chan_reg))
> > + return PTR_ERR(audev->chan_reg);
> > +
> > + sdev = &audev->shdma_dev;
> > + sdev->ops = &audmapp_shdma_ops;
> > + sdev->desc_size = sizeof(struct shdma_desc);
> > +
> > + dma_dev = &sdev->dma_dev;
> > + dma_dev->copy_align = LOG2_DEFAULT_XFER_SIZE;
> > + dma_cap_set(DMA_SLAVE, dma_dev->cap_mask);
> > +
> > + err = shdma_init(&pdev->dev, sdev, AUDMAPP_MAX_CHANNELS);
> > + if (err < 0)
> > + return err;
> > +
> > + platform_set_drvdata(pdev, audev);
> > +
> > + /* Create DMA Channel */
> > + for (i = 0; i < AUDMAPP_MAX_CHANNELS; i++) {
> > + err = audmapp_chan_probe(pdev, audev, i);
> > + if (err)
> > + goto chan_probe_err;
> > + }
> > +
> > + err = dma_async_device_register(dma_dev);
> > + if (err < 0)
> > + goto chan_probe_err;
> > +
> > + return err;
> > +
> > +chan_probe_err:
> > + audmapp_chan_remove(audev);
> > + shdma_cleanup(sdev);
> > +
> > + return err;
> > +}
> > +
> > +static int audmapp_remove(struct platform_device *pdev)
> > +{
> > + struct audmapp_device *audev = platform_get_drvdata(pdev);
> > + struct dma_device *dma_dev = &audev->shdma_dev.dma_dev;
> > +
> > + dma_async_device_unregister(dma_dev);
> > +
> > + audmapp_chan_remove(audev);
> > + shdma_cleanup(&audev->shdma_dev);
> > +
> > + return 0;
> > +}
> > +
> > +static struct platform_driver audmapp_driver = {
> > + .probe = audmapp_probe,
> > + .remove = audmapp_remove,
> > + .driver = {
> > + .owner = THIS_MODULE,
> > + .name = "rcar-audmapp-engine",
> > + },
> > +};
> > +module_platform_driver(audmapp_driver);
> > +
> > +MODULE_AUTHOR("Kuninori Morimoto <[email protected]>");
> > +MODULE_DESCRIPTION("Renesas R-Car Audio DMAC peri-peri driver");
> > +MODULE_LICENSE("GPL");
> > diff --git a/include/linux/platform_data/dma-rcar-audmapp.h b/include/linux/platform_data/dma-rcar-audmapp.h
> > new file mode 100644
> > index 0000000..346df66
> > --- /dev/null
> > +++ b/include/linux/platform_data/dma-rcar-audmapp.h
> > @@ -0,0 +1,34 @@
> > +/*
> > + * include/linux/sh_audma-pp.h
> > + * This file is header file for Audio-DMAC-pp peripheral.
> > + *
> > + * Copyright (C) 2013 Renesas Electronics Corporation
> > + *
> > + * This file is based on the include/linux/sh_dma.h
> > + *
> > + * Header for the new SH dmaengine driver
> > + *
> > + * Copyright (C) 2010 Guennadi Liakhovetski <[email protected]>
> > + *
> > + * This program is free software; you can redistribute it and/or modify
> > + * it under the terms of the GNU General Public License version 2 as
> > + * published by the Free Software Foundation.
> > + */
> > +#ifndef SH_AUDMAPP_H
> > +#define SH_AUDMAPP_H
> > +
> > +#include <linux/dmaengine.h>
> > +
> > +struct audmapp_slave_config {
> > + int slave_id;
> > + dma_addr_t src;
> > + dma_addr_t dst;
> > + u32 chcr;
> > +};
> > +
> > +struct audmapp_pdata {
> > + struct audmapp_slave_config *slave;
> > + int slave_num;
> > +};
> > +
> > +#endif /* SH_AUDMAPP_H */
> > --
> > 1.7.9.5
> >