[PATCH 0/2] ASoC: au1x: update PSC AC97/I2S code

[PATCH 0/2] ASoC: au1x: update PSC AC97/I2S code

[Manuel Lauss]

The following two patches depend on patchset "ASoC for Alchemy Au1000/1500/1100"
to apply and work.
Patch #1 moves the DBDMA (PCM) device registration from the AC97/I2S drivers
  into the board code.
Patch #2 changes use of "soc-audio" platform device int db1200 machine code to
  the new way.

Run-tested on DB1200, DB1300 and DB1550 boards.

Manuel Lauss (2):
  ASoC: au1x: remove automatic DMA device registration from PSC drivers
  ASoC: au1x: update db1200 machine to the new way of things

 arch/mips/alchemy/devboards/db1200/platform.c |   16 +++++
 sound/soc/au1x/db1200.c                       |   64 +++++++++++++------
 sound/soc/au1x/dbdma2.c                       |   83 ++++---------------------
 sound/soc/au1x/psc-ac97.c                     |   34 +++++++---
 sound/soc/au1x/psc-i2s.c                      |   32 +++++++---
 sound/soc/au1x/psc.h                          |    5 --
 6 files changed, 117 insertions(+), 117 deletions(-)

-- 
1.7.6

[PATCH 1/2] ASoC: au1x: remove automatic DMA device registration from PSC drivers

[Manuel Lauss]

The PSC audio drivers (psc-ac97/psc-i2s) register the DMA platform_device
on their own.  This is frowned upon, from now on board code must
register a simple pcm dma platform device for each PSC with sound duties.

Signed-off-by: Manuel Lauss <manuel.lauss@googlemail.com>
---
 arch/mips/alchemy/devboards/db1200/platform.c |    6 ++
 sound/soc/au1x/dbdma2.c                       |   83 ++++---------------------
 sound/soc/au1x/psc-ac97.c                     |   34 +++++++---
 sound/soc/au1x/psc-i2s.c                      |   32 +++++++---
 sound/soc/au1x/psc.h                          |    5 --
 5 files changed, 64 insertions(+), 96 deletions(-)

diff --git a/arch/mips/alchemy/devboards/db1200/platform.c b/arch/mips/alchemy/devboards/db1200/platform.c
index fbb5593..cfb71ae 100644
--- a/arch/mips/alchemy/devboards/db1200/platform.c
+++ b/arch/mips/alchemy/devboards/db1200/platform.c
@@ -434,12 +434,18 @@ static struct platform_device db1200_stac_dev = {
 	.id		= 1,	/* on PSC1 */
 };
 
+static struct platform_device db1200_audiodma_dev = {
+	.name		= "au1xpsc-pcm",
+	.id		= 1,	/* PSC ID */
+};
+
 static struct platform_device *db1200_devs[] __initdata = {
 	NULL,		/* PSC0, selected by S6.8 */
 	&db1200_ide_dev,
 	&db1200_eth_dev,
 	&db1200_rtc_dev,
 	&db1200_nand_dev,
+	&db1200_audiodma_dev,
 	&db1200_audio_dev,
 	&db1200_stac_dev,
 };
diff --git a/sound/soc/au1x/dbdma2.c b/sound/soc/au1x/dbdma2.c
index 10fdd28..cc53607 100644
--- a/sound/soc/au1x/dbdma2.c
+++ b/sound/soc/au1x/dbdma2.c
@@ -293,6 +293,16 @@ au1xpsc_pcm_pointer(struct snd_pcm_substream *substream)
 
 static int au1xpsc_pcm_open(struct snd_pcm_substream *substream)
 {
+	struct au1xpsc_audio_dmadata *pcd = to_dmadata(substream);
+	struct snd_soc_pcm_runtime *rtd = substream->private_data;
+	int stype = SUBSTREAM_TYPE(substream), *dmaids;
+
+	dmaids = snd_soc_dai_get_dma_data(rtd->cpu_dai, substream);
+	if (!dmaids)
+		return -ENODEV;	/* whoa, has ordering changed? */
+
+	pcd->ddma_id = dmaids[stype];
+
 	snd_soc_set_runtime_hwparams(substream, &au1xpsc_pcm_hardware);
 	return 0;
 }
@@ -339,36 +349,18 @@ struct snd_soc_platform_driver au1xpsc_soc_platform = {
 static int __devinit au1xpsc_pcm_drvprobe(struct platform_device *pdev)
 {
 	struct au1xpsc_audio_dmadata *dmadata;
-	struct resource *r;
 	int ret;
 
 	dmadata = kzalloc(2 * sizeof(struct au1xpsc_audio_dmadata), GFP_KERNEL);
 	if (!dmadata)
 		return -ENOMEM;
 
-	r = platform_get_resource(pdev, IORESOURCE_DMA, 0);
-	if (!r) {
-		ret = -ENODEV;
-		goto out1;
-	}
-	dmadata[PCM_TX].ddma_id = r->start;
-
-	/* RX DMA */
-	r = platform_get_resource(pdev, IORESOURCE_DMA, 1);
-	if (!r) {
-		ret = -ENODEV;
-		goto out1;
-	}
-	dmadata[PCM_RX].ddma_id = r->start;
-
 	platform_set_drvdata(pdev, dmadata);
 
 	ret = snd_soc_register_platform(&pdev->dev, &au1xpsc_soc_platform);
-	if (!ret)
-		return ret;
+	if (ret)
+		kfree(dmadata);
 
-out1:
-	kfree(dmadata);
 	return ret;
 }
 
@@ -404,57 +396,6 @@ static void __exit au1xpsc_audio_dbdma_unload(void)
 module_init(au1xpsc_audio_dbdma_load);
 module_exit(au1xpsc_audio_dbdma_unload);
 
-
-struct platform_device *au1xpsc_pcm_add(struct platform_device *pdev)
-{
-	struct resource *res, *r;
-	struct platform_device *pd;
-	int id[2];
-	int ret;
-
-	r = platform_get_resource(pdev, IORESOURCE_DMA, 0);
-	if (!r)
-		return NULL;
-	id[0] = r->start;
-
-	r = platform_get_resource(pdev, IORESOURCE_DMA, 1);
-	if (!r)
-		return NULL;
-	id[1] = r->start;
-
-	res = kzalloc(sizeof(struct resource) * 2, GFP_KERNEL);
-	if (!res)
-		return NULL;
-
-	res[0].start = res[0].end = id[0];
-	res[1].start = res[1].end = id[1];
-	res[0].flags = res[1].flags = IORESOURCE_DMA;
-
-	pd = platform_device_alloc("au1xpsc-pcm", pdev->id);
-	if (!pd)
-		goto out;
-
-	pd->resource = res;
-	pd->num_resources = 2;
-
-	ret = platform_device_add(pd);
-	if (!ret)
-		return pd;
-
-	platform_device_put(pd);
-out:
-	kfree(res);
-	return NULL;
-}
-EXPORT_SYMBOL_GPL(au1xpsc_pcm_add);
-
-void au1xpsc_pcm_destroy(struct platform_device *dmapd)
-{
-	if (dmapd)
-		platform_device_unregister(dmapd);
-}
-EXPORT_SYMBOL_GPL(au1xpsc_pcm_destroy);
-
 MODULE_LICENSE("GPL");
 MODULE_DESCRIPTION("Au12x0/Au1550 PSC Audio DMA driver");
 MODULE_AUTHOR("Manuel Lauss");
diff --git a/sound/soc/au1x/psc-ac97.c b/sound/soc/au1x/psc-ac97.c
index d0db66f..44296ab 100644
--- a/sound/soc/au1x/psc-ac97.c
+++ b/sound/soc/au1x/psc-ac97.c
@@ -324,12 +324,21 @@ static int au1xpsc_ac97_trigger(struct snd_pcm_substream *substream,
 	return ret;
 }
 
+static int au1xpsc_ac97_startup(struct snd_pcm_substream *substream,
+				struct snd_soc_dai *dai)
+{
+	struct au1xpsc_audio_data *pscdata = snd_soc_dai_get_drvdata(dai);
+	snd_soc_dai_set_dma_data(dai, substream, &pscdata->dmaids[0]);
+	return 0;
+}
+
 static int au1xpsc_ac97_probe(struct snd_soc_dai *dai)
 {
 	return au1xpsc_ac97_workdata ? 0 : -ENODEV;
 }
 
 static struct snd_soc_dai_ops au1xpsc_ac97_dai_ops = {
+	.startup	= au1xpsc_ac97_startup,
 	.trigger	= au1xpsc_ac97_trigger,
 	.hw_params	= au1xpsc_ac97_hw_params,
 };
@@ -379,6 +388,16 @@ static int __devinit au1xpsc_ac97_drvprobe(struct platform_device *pdev)
 	if (!wd->mmio)
 		goto out1;
 
+	r = platform_get_resource(pdev, IORESOURCE_DMA, 0);
+	if (!r)
+		goto out2;
+	wd->dmaids[PCM_TX] = r->start;
+
+	r = platform_get_resource(pdev, IORESOURCE_DMA, 1);
+	if (!r)
+		goto out2;
+	wd->dmaids[PCM_RX] = r->start;
+
 	/* configuration: max dma trigger threshold, enable ac97 */
 	wd->cfg = PSC_AC97CFG_RT_FIFO8 | PSC_AC97CFG_TT_FIFO8 |
 		  PSC_AC97CFG_DE_ENABLE;
@@ -401,15 +420,13 @@ static int __devinit au1xpsc_ac97_drvprobe(struct platform_device *pdev)
 
 	ret = snd_soc_register_dai(&pdev->dev, &wd->dai_drv);
 	if (ret)
-		goto out1;
+		goto out2;
 
-	wd->dmapd = au1xpsc_pcm_add(pdev);
-	if (wd->dmapd) {
-		au1xpsc_ac97_workdata = wd;
-		return 0;
-	}
+	au1xpsc_ac97_workdata = wd;
+	return 0;
 
-	snd_soc_unregister_dai(&pdev->dev);
+out2:
+	iounmap(wd->mmio);
 out1:
 	release_mem_region(r->start, resource_size(r));
 out0:
@@ -422,9 +439,6 @@ static int __devexit au1xpsc_ac97_drvremove(struct platform_device *pdev)
 	struct au1xpsc_audio_data *wd = platform_get_drvdata(pdev);
 	struct resource *r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 
-	if (wd->dmapd)
-		au1xpsc_pcm_destroy(wd->dmapd);
-
 	snd_soc_unregister_dai(&pdev->dev);
 
 	/* disable PSC completely */
diff --git a/sound/soc/au1x/psc-i2s.c b/sound/soc/au1x/psc-i2s.c
index fca0912..1b7ab5d 100644
--- a/sound/soc/au1x/psc-i2s.c
+++ b/sound/soc/au1x/psc-i2s.c
@@ -257,7 +257,16 @@ static int au1xpsc_i2s_trigger(struct snd_pcm_substream *substream, int cmd,
 	return ret;
 }
 
+static int au1xpsc_i2s_startup(struct snd_pcm_substream *substream,
+			       struct snd_soc_dai *dai)
+{
+	struct au1xpsc_audio_data *pscdata = snd_soc_dai_get_drvdata(dai);
+	snd_soc_dai_set_dma_data(dai, substream, &pscdata->dmaids[0]);
+	return 0;
+}
+
 static struct snd_soc_dai_ops au1xpsc_i2s_dai_ops = {
+	.startup	= au1xpsc_i2s_startup,
 	.trigger	= au1xpsc_i2s_trigger,
 	.hw_params	= au1xpsc_i2s_hw_params,
 	.set_fmt	= au1xpsc_i2s_set_fmt,
@@ -304,6 +313,16 @@ static int __devinit au1xpsc_i2s_drvprobe(struct platform_device *pdev)
 	if (!wd->mmio)
 		goto out1;
 
+	r = platform_get_resource(pdev, IORESOURCE_DMA, 0);
+	if (!r)
+		goto out2;
+	wd->dmaids[PCM_TX] = r->start;
+
+	r = platform_get_resource(pdev, IORESOURCE_DMA, 1);
+	if (!r)
+		goto out2;
+	wd->dmaids[PCM_RX] = r->start;
+
 	/* preserve PSC clock source set up by platform (dev.platform_data
 	 * is already occupied by soc layer)
 	 */
@@ -330,15 +349,11 @@ static int __devinit au1xpsc_i2s_drvprobe(struct platform_device *pdev)
 	platform_set_drvdata(pdev, wd);
 
 	ret = snd_soc_register_dai(&pdev->dev, &wd->dai_drv);
-	if (ret)
-		goto out1;
-
-	/* finally add the DMA device for this PSC */
-	wd->dmapd = au1xpsc_pcm_add(pdev);
-	if (wd->dmapd)
+	if (!ret)
 		return 0;
 
-	snd_soc_unregister_dai(&pdev->dev);
+out2:
+	iounmap(wd->mmio);
 out1:
 	release_mem_region(r->start, resource_size(r));
 out0:
@@ -351,9 +366,6 @@ static int __devexit au1xpsc_i2s_drvremove(struct platform_device *pdev)
 	struct au1xpsc_audio_data *wd = platform_get_drvdata(pdev);
 	struct resource *r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 
-	if (wd->dmapd)
-		au1xpsc_pcm_destroy(wd->dmapd);
-
 	snd_soc_unregister_dai(&pdev->dev);
 
 	au_writel(0, I2S_CFG(wd));
diff --git a/sound/soc/au1x/psc.h b/sound/soc/au1x/psc.h
index c59b9e5..1b21c4f 100644
--- a/sound/soc/au1x/psc.h
+++ b/sound/soc/au1x/psc.h
@@ -19,10 +19,6 @@
 #define SUBSTREAM_TYPE(substream) \
 	((substream)->stream == SNDRV_PCM_STREAM_PLAYBACK ? PCM_TX : PCM_RX)
 
-/* PSC/DBDMA helpers */
-extern struct platform_device *au1xpsc_pcm_add(struct platform_device *pdev);
-extern void au1xpsc_pcm_destroy(struct platform_device *dmapd);
-
 struct au1xpsc_audio_data {
 	void __iomem *mmio;
 
@@ -34,7 +30,6 @@ struct au1xpsc_audio_data {
 	unsigned long pm[2];
 	struct mutex lock;
 	int dmaids[2];
-	struct platform_device *dmapd;
 };
 
 /* easy access macros */
-- 
1.7.6

Re: [PATCH 1/2] ASoC: au1x: remove automatic DMA device registration from PSC drivers

[Liam Girdwood]

On 24/07/11 14:11, Manuel Lauss wrote:
> The PSC audio drivers (psc-ac97/psc-i2s) register the DMA platform_device
> on their own.  This is frowned upon, from now on board code must
> register a simple pcm dma platform device for each PSC with sound duties.
> 
> Signed-off-by: Manuel Lauss <manuel.lauss@googlemail.com>
> ---
>  arch/mips/alchemy/devboards/db1200/platform.c |    6 ++
>  sound/soc/au1x/dbdma2.c                       |   83 ++++---------------------
>  sound/soc/au1x/psc-ac97.c                     |   34 +++++++---
>  sound/soc/au1x/psc-i2s.c                      |   32 +++++++---
>  sound/soc/au1x/psc.h                          |    5 --
>  5 files changed, 64 insertions(+), 96 deletions(-)
> 
> diff --git a/arch/mips/alchemy/devboards/db1200/platform.c b/arch/mips/alchemy/devboards/db1200/platform.c
> index fbb5593..cfb71ae 100644
> --- a/arch/mips/alchemy/devboards/db1200/platform.c
> +++ b/arch/mips/alchemy/devboards/db1200/platform.c
> @@ -434,12 +434,18 @@ static struct platform_device db1200_stac_dev = {
>  	.id		= 1,	/* on PSC1 */
>  };
>  
> +static struct platform_device db1200_audiodma_dev = {
> +	.name		= "au1xpsc-pcm",
> +	.id		= 1,	/* PSC ID */
> +};
> +
>  static struct platform_device *db1200_devs[] __initdata = {
>  	NULL,		/* PSC0, selected by S6.8 */
>  	&db1200_ide_dev,
>  	&db1200_eth_dev,
>  	&db1200_rtc_dev,
>  	&db1200_nand_dev,
> +	&db1200_audiodma_dev,
>  	&db1200_audio_dev,
>  	&db1200_stac_dev,
>  };
> diff --git a/sound/soc/au1x/dbdma2.c b/sound/soc/au1x/dbdma2.c
> index 10fdd28..cc53607 100644
> --- a/sound/soc/au1x/dbdma2.c
> +++ b/sound/soc/au1x/dbdma2.c
> @@ -293,6 +293,16 @@ au1xpsc_pcm_pointer(struct snd_pcm_substream *substream)
>  
>  static int au1xpsc_pcm_open(struct snd_pcm_substream *substream)
>  {
> +	struct au1xpsc_audio_dmadata *pcd = to_dmadata(substream);
> +	struct snd_soc_pcm_runtime *rtd = substream->private_data;
> +	int stype = SUBSTREAM_TYPE(substream), *dmaids;
> +
> +	dmaids = snd_soc_dai_get_dma_data(rtd->cpu_dai, substream);
> +	if (!dmaids)
> +		return -ENODEV;	/* whoa, has ordering changed? */
> +
> +	pcd->ddma_id = dmaids[stype];
> +
>  	snd_soc_set_runtime_hwparams(substream, &au1xpsc_pcm_hardware);
>  	return 0;
>  }
> @@ -339,36 +349,18 @@ struct snd_soc_platform_driver au1xpsc_soc_platform = {
>  static int __devinit au1xpsc_pcm_drvprobe(struct platform_device *pdev)
>  {
>  	struct au1xpsc_audio_dmadata *dmadata;
> -	struct resource *r;
>  	int ret;
>  
>  	dmadata = kzalloc(2 * sizeof(struct au1xpsc_audio_dmadata), GFP_KERNEL);
>  	if (!dmadata)
>  		return -ENOMEM;
>  
> -	r = platform_get_resource(pdev, IORESOURCE_DMA, 0);
> -	if (!r) {
> -		ret = -ENODEV;
> -		goto out1;
> -	}
> -	dmadata[PCM_TX].ddma_id = r->start;
> -
> -	/* RX DMA */
> -	r = platform_get_resource(pdev, IORESOURCE_DMA, 1);
> -	if (!r) {
> -		ret = -ENODEV;
> -		goto out1;
> -	}
> -	dmadata[PCM_RX].ddma_id = r->start;
> -
>  	platform_set_drvdata(pdev, dmadata);
>  
>  	ret = snd_soc_register_platform(&pdev->dev, &au1xpsc_soc_platform);
> -	if (!ret)
> -		return ret;
> +	if (ret)
> +		kfree(dmadata);
>  
> -out1:
> -	kfree(dmadata);
>  	return ret;
>  }
>  
> @@ -404,57 +396,6 @@ static void __exit au1xpsc_audio_dbdma_unload(void)
>  module_init(au1xpsc_audio_dbdma_load);
>  module_exit(au1xpsc_audio_dbdma_unload);
>  
> -
> -struct platform_device *au1xpsc_pcm_add(struct platform_device *pdev)
> -{
> -	struct resource *res, *r;
> -	struct platform_device *pd;
> -	int id[2];
> -	int ret;
> -
> -	r = platform_get_resource(pdev, IORESOURCE_DMA, 0);
> -	if (!r)
> -		return NULL;
> -	id[0] = r->start;
> -
> -	r = platform_get_resource(pdev, IORESOURCE_DMA, 1);
> -	if (!r)
> -		return NULL;
> -	id[1] = r->start;
> -
> -	res = kzalloc(sizeof(struct resource) * 2, GFP_KERNEL);
> -	if (!res)
> -		return NULL;
> -
> -	res[0].start = res[0].end = id[0];
> -	res[1].start = res[1].end = id[1];
> -	res[0].flags = res[1].flags = IORESOURCE_DMA;
> -
> -	pd = platform_device_alloc("au1xpsc-pcm", pdev->id);
> -	if (!pd)
> -		goto out;
> -
> -	pd->resource = res;
> -	pd->num_resources = 2;
> -
> -	ret = platform_device_add(pd);
> -	if (!ret)
> -		return pd;
> -
> -	platform_device_put(pd);
> -out:
> -	kfree(res);
> -	return NULL;
> -}
> -EXPORT_SYMBOL_GPL(au1xpsc_pcm_add);
> -
> -void au1xpsc_pcm_destroy(struct platform_device *dmapd)
> -{
> -	if (dmapd)
> -		platform_device_unregister(dmapd);
> -}
> -EXPORT_SYMBOL_GPL(au1xpsc_pcm_destroy);
> -
>  MODULE_LICENSE("GPL");
>  MODULE_DESCRIPTION("Au12x0/Au1550 PSC Audio DMA driver");
>  MODULE_AUTHOR("Manuel Lauss");
> diff --git a/sound/soc/au1x/psc-ac97.c b/sound/soc/au1x/psc-ac97.c
> index d0db66f..44296ab 100644
> --- a/sound/soc/au1x/psc-ac97.c
> +++ b/sound/soc/au1x/psc-ac97.c
> @@ -324,12 +324,21 @@ static int au1xpsc_ac97_trigger(struct snd_pcm_substream *substream,
>  	return ret;
>  }
>  
> +static int au1xpsc_ac97_startup(struct snd_pcm_substream *substream,
> +				struct snd_soc_dai *dai)
> +{
> +	struct au1xpsc_audio_data *pscdata = snd_soc_dai_get_drvdata(dai);
> +	snd_soc_dai_set_dma_data(dai, substream, &pscdata->dmaids[0]);
> +	return 0;
> +}
> +
>  static int au1xpsc_ac97_probe(struct snd_soc_dai *dai)
>  {
>  	return au1xpsc_ac97_workdata ? 0 : -ENODEV;
>  }
>  
>  static struct snd_soc_dai_ops au1xpsc_ac97_dai_ops = {
> +	.startup	= au1xpsc_ac97_startup,
>  	.trigger	= au1xpsc_ac97_trigger,
>  	.hw_params	= au1xpsc_ac97_hw_params,
>  };
> @@ -379,6 +388,16 @@ static int __devinit au1xpsc_ac97_drvprobe(struct platform_device *pdev)
>  	if (!wd->mmio)
>  		goto out1;
>  
> +	r = platform_get_resource(pdev, IORESOURCE_DMA, 0);
> +	if (!r)
> +		goto out2;
> +	wd->dmaids[PCM_TX] = r->start;
> +
> +	r = platform_get_resource(pdev, IORESOURCE_DMA, 1);
> +	if (!r)
> +		goto out2;
> +	wd->dmaids[PCM_RX] = r->start;
> +
>  	/* configuration: max dma trigger threshold, enable ac97 */
>  	wd->cfg = PSC_AC97CFG_RT_FIFO8 | PSC_AC97CFG_TT_FIFO8 |
>  		  PSC_AC97CFG_DE_ENABLE;
> @@ -401,15 +420,13 @@ static int __devinit au1xpsc_ac97_drvprobe(struct platform_device *pdev)
>  
>  	ret = snd_soc_register_dai(&pdev->dev, &wd->dai_drv);
>  	if (ret)
> -		goto out1;
> +		goto out2;
>  
> -	wd->dmapd = au1xpsc_pcm_add(pdev);
> -	if (wd->dmapd) {
> -		au1xpsc_ac97_workdata = wd;
> -		return 0;
> -	}
> +	au1xpsc_ac97_workdata = wd;
> +	return 0;
>  
> -	snd_soc_unregister_dai(&pdev->dev);
> +out2:
> +	iounmap(wd->mmio);
>  out1:
>  	release_mem_region(r->start, resource_size(r));
>  out0:
> @@ -422,9 +439,6 @@ static int __devexit au1xpsc_ac97_drvremove(struct platform_device *pdev)
>  	struct au1xpsc_audio_data *wd = platform_get_drvdata(pdev);
>  	struct resource *r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
>  
> -	if (wd->dmapd)
> -		au1xpsc_pcm_destroy(wd->dmapd);
> -
>  	snd_soc_unregister_dai(&pdev->dev);
>  
>  	/* disable PSC completely */
> diff --git a/sound/soc/au1x/psc-i2s.c b/sound/soc/au1x/psc-i2s.c
> index fca0912..1b7ab5d 100644
> --- a/sound/soc/au1x/psc-i2s.c
> +++ b/sound/soc/au1x/psc-i2s.c
> @@ -257,7 +257,16 @@ static int au1xpsc_i2s_trigger(struct snd_pcm_substream *substream, int cmd,
>  	return ret;
>  }
>  
> +static int au1xpsc_i2s_startup(struct snd_pcm_substream *substream,
> +			       struct snd_soc_dai *dai)
> +{
> +	struct au1xpsc_audio_data *pscdata = snd_soc_dai_get_drvdata(dai);
> +	snd_soc_dai_set_dma_data(dai, substream, &pscdata->dmaids[0]);
> +	return 0;
> +}
> +
>  static struct snd_soc_dai_ops au1xpsc_i2s_dai_ops = {
> +	.startup	= au1xpsc_i2s_startup,
>  	.trigger	= au1xpsc_i2s_trigger,
>  	.hw_params	= au1xpsc_i2s_hw_params,
>  	.set_fmt	= au1xpsc_i2s_set_fmt,
> @@ -304,6 +313,16 @@ static int __devinit au1xpsc_i2s_drvprobe(struct platform_device *pdev)
>  	if (!wd->mmio)
>  		goto out1;
>  
> +	r = platform_get_resource(pdev, IORESOURCE_DMA, 0);
> +	if (!r)
> +		goto out2;
> +	wd->dmaids[PCM_TX] = r->start;

It's best to use the SNDRV_PCM_STREAM_PLAYBACK and CAPTURE for these indexes. Makes the code easier to read :)

> +
> +	r = platform_get_resource(pdev, IORESOURCE_DMA, 1);
> +	if (!r)
> +		goto out2;
> +	wd->dmaids[PCM_RX] = r->start;
> +
>  	/* preserve PSC clock source set up by platform (dev.platform_data
>  	 * is already occupied by soc layer)
>  	 */
> @@ -330,15 +349,11 @@ static int __devinit au1xpsc_i2s_drvprobe(struct platform_device *pdev)
>  	platform_set_drvdata(pdev, wd);
>  
>  	ret = snd_soc_register_dai(&pdev->dev, &wd->dai_drv);
> -	if (ret)
> -		goto out1;
> -
> -	/* finally add the DMA device for this PSC */
> -	wd->dmapd = au1xpsc_pcm_add(pdev);
> -	if (wd->dmapd)
> +	if (!ret)
>  		return 0;
>  
> -	snd_soc_unregister_dai(&pdev->dev);
> +out2:
> +	iounmap(wd->mmio);
>  out1:
>  	release_mem_region(r->start, resource_size(r));
>  out0:
> @@ -351,9 +366,6 @@ static int __devexit au1xpsc_i2s_drvremove(struct platform_device *pdev)
>  	struct au1xpsc_audio_data *wd = platform_get_drvdata(pdev);
>  	struct resource *r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
>  
> -	if (wd->dmapd)
> -		au1xpsc_pcm_destroy(wd->dmapd);
> -
>  	snd_soc_unregister_dai(&pdev->dev);
>  
>  	au_writel(0, I2S_CFG(wd));
> diff --git a/sound/soc/au1x/psc.h b/sound/soc/au1x/psc.h
> index c59b9e5..1b21c4f 100644
> --- a/sound/soc/au1x/psc.h
> +++ b/sound/soc/au1x/psc.h
> @@ -19,10 +19,6 @@
>  #define SUBSTREAM_TYPE(substream) \
>  	((substream)->stream == SNDRV_PCM_STREAM_PLAYBACK ? PCM_TX : PCM_RX)
>  
> -/* PSC/DBDMA helpers */
> -extern struct platform_device *au1xpsc_pcm_add(struct platform_device *pdev);
> -extern void au1xpsc_pcm_destroy(struct platform_device *dmapd);
> -
>  struct au1xpsc_audio_data {
>  	void __iomem *mmio;
>  
> @@ -34,7 +30,6 @@ struct au1xpsc_audio_data {
>  	unsigned long pm[2];
>  	struct mutex lock;
>  	int dmaids[2];
> -	struct platform_device *dmapd;
>  };
>  
>  /* easy access macros */

[PATCH 2/2] ASoC: au1x: update db1200 machine to the new way of things

[Manuel Lauss]

The use of the "soc-audio" platform device is no longer en vogue,
update the code to the newer, simpler way of doing things.

Signed-off-by: Manuel Lauss <manuel.lauss@googlemail.com>
---
 arch/mips/alchemy/devboards/db1200/platform.c |   10 ++++
 sound/soc/au1x/db1200.c                       |   64 +++++++++++++++++--------
 2 files changed, 53 insertions(+), 21 deletions(-)

diff --git a/arch/mips/alchemy/devboards/db1200/platform.c b/arch/mips/alchemy/devboards/db1200/platform.c
index cfb71ae..dda090b 100644
--- a/arch/mips/alchemy/devboards/db1200/platform.c
+++ b/arch/mips/alchemy/devboards/db1200/platform.c
@@ -422,6 +422,7 @@ static struct resource au1200_psc1_res[] = {
 	},
 };
 
+/* AC97 or I2S device */
 static struct platform_device db1200_audio_dev = {
 	/* name assigned later based on switch setting */
 	.id		= 1,	/* PSC ID */
@@ -429,6 +430,12 @@ static struct platform_device db1200_audio_dev = {
 	.resource	= au1200_psc1_res,
 };
 
+/* DB1200 ASoC card device */
+static struct platform_device db1200_sound_dev = {
+	/* name assigned later based on switch setting */
+	.id		= 1,	/* PSC ID */
+};
+
 static struct platform_device db1200_stac_dev = {
 	.name		= "ac97-codec",
 	.id		= 1,	/* on PSC1 */
@@ -448,6 +455,7 @@ static struct platform_device *db1200_devs[] __initdata = {
 	&db1200_audiodma_dev,
 	&db1200_audio_dev,
 	&db1200_stac_dev,
+	&db1200_sound_dev,
 };
 
 static int __init db1200_dev_init(void)
@@ -507,10 +515,12 @@ static int __init db1200_dev_init(void)
 	if (sw == BCSR_SWITCHES_DIP_8) {
 		bcsr_mod(BCSR_RESETS, 0, BCSR_RESETS_PSC1MUX);
 		db1200_audio_dev.name = "au1xpsc_i2s";
+		db1200_sound_dev.name = "db1200-i2s";
 		printk(KERN_INFO " S6.7 ON : PSC1 mode I2S\n");
 	} else {
 		bcsr_mod(BCSR_RESETS, BCSR_RESETS_PSC1MUX, 0);
 		db1200_audio_dev.name = "au1xpsc_ac97";
+		db1200_sound_dev.name = "db1200-ac97";
 		printk(KERN_INFO " S6.7 OFF: PSC1 mode AC97\n");
 	}
 
diff --git a/sound/soc/au1x/db1200.c b/sound/soc/au1x/db1200.c
index 1d3e258..289312c 100644
--- a/sound/soc/au1x/db1200.c
+++ b/sound/soc/au1x/db1200.c
@@ -1,7 +1,7 @@
 /*
  * DB1200 ASoC audio fabric support code.
  *
- * (c) 2008-9 Manuel Lauss <manuel.lauss@gmail.com>
+ * (c) 2008-2011 Manuel Lauss <manuel.lauss@googlemail.com>
  *
  */
 
@@ -21,6 +21,17 @@
 #include "../codecs/wm8731.h"
 #include "psc.h"
 
+static struct platform_device_id db1200_pids[] = {
+	{
+		.name		= "db1200-ac97",
+		.driver_data	= 0,
+	}, {
+		.name		= "db1200-i2s",
+		.driver_data	= 1,
+	},
+	{},
+};
+
 /*-------------------------  AC97 PART  ---------------------------*/
 
 static struct snd_soc_dai_link db1200_ac97_dai = {
@@ -89,36 +100,47 @@ static struct snd_soc_card db1200_i2s_machine = {
 
 /*-------------------------  COMMON PART  ---------------------------*/
 
-static struct platform_device *db1200_asoc_dev;
+static struct snd_soc_card *db1200_cards[] __devinitdata = {
+	&db1200_ac97_machine,
+	&db1200_i2s_machine,
+};
 
-static int __init db1200_audio_load(void)
+static int __devinit db1200_audio_probe(struct platform_device *pdev)
 {
-	int ret;
+	const struct platform_device_id *pid = platform_get_device_id(pdev);
+	struct snd_soc_card *card;
 
-	ret = -ENOMEM;
-	db1200_asoc_dev = platform_device_alloc("soc-audio", 1); /* PSC1 */
-	if (!db1200_asoc_dev)
-		goto out;
+	card = db1200_cards[pid->driver_data];
+	card->dev = &pdev->dev;
+	return snd_soc_register_card(card);
+}
 
-	/* DB1200 board setup set PSC1MUX to preferred audio device */
-	if (bcsr_read(BCSR_RESETS) & BCSR_RESETS_PSC1MUX)
-		platform_set_drvdata(db1200_asoc_dev, &db1200_i2s_machine);
-	else
-		platform_set_drvdata(db1200_asoc_dev, &db1200_ac97_machine);
+static int __devexit db1200_audio_remove(struct platform_device *pdev)
+{
+	struct snd_soc_card *card = platform_get_drvdata(pdev);
+	snd_soc_unregister_card(card);
+	return 0;
+}
 
-	ret = platform_device_add(db1200_asoc_dev);
+static struct platform_driver db1200_audio_driver = {
+	.driver	= {
+		.name	= "db1200-ac97",
+		.owner	= THIS_MODULE,
+		.pm	= &snd_soc_pm_ops,
+	},
+	.id_table	= db1200_pids,
+	.probe		= db1200_audio_probe,
+	.remove		= __devexit_p(db1200_audio_remove),
+};
 
-	if (ret) {
-		platform_device_put(db1200_asoc_dev);
-		db1200_asoc_dev = NULL;
-	}
-out:
-	return ret;
+static int __init db1200_audio_load(void)
+{
+	return platform_driver_register(&db1200_audio_driver);
 }
 
 static void __exit db1200_audio_unload(void)
 {
-	platform_device_unregister(db1200_asoc_dev);
+	platform_driver_unregister(&db1200_audio_driver);
 }
 
 module_init(db1200_audio_load);
-- 
1.7.6