ASoC: fix au1x platform

This patch fixes up the au1x audio platform after the multi-component
merge:
- compile fixes and updates to get DB1200 platform audio working again,
- removal of global variables in AC97/I2S/DMA(PCM) modules.

The AC97 part is limited to one instance only for now due to issues
with getting at driver data in the soc_ac97_ops.

Signed-off-by: Manuel Lauss <manuel.lauss@googlemail.com>
Acked-by: Liam Girdwood <lrg@slimlogic.co.uk>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

6 files changed, 91 insertions, 121 deletions

diff --git a/arch/mips/alchemy/devboards/db1200/platform.c b/arch/mips/alchemy/devboards/db1200/platform.c
index 3fa34c3abc04..fbb55935b99e 100644
--- a/arch/mips/alchemy/devboards/db1200/platform.c
+++ b/arch/mips/alchemy/devboards/db1200/platform.c
@@ -429,6 +429,11 @@ static struct platform_device db1200_audio_dev = {
 	.resource	= au1200_psc1_res,
 };
 
+static struct platform_device db1200_stac_dev = {
+	.name		= "ac97-codec",
+	.id		= 1,	/* on PSC1 */
+};
+
 static struct platform_device *db1200_devs[] __initdata = {
 	NULL,		/* PSC0, selected by S6.8 */
 	&db1200_ide_dev,
@@ -436,6 +441,7 @@ static struct platform_device *db1200_devs[] __initdata = {
 	&db1200_rtc_dev,
 	&db1200_nand_dev,
 	&db1200_audio_dev,
+	&db1200_stac_dev,
 };
 
 static int __init db1200_dev_init(void)
diff --git a/sound/soc/au1x/db1200.c b/sound/soc/au1x/db1200.c
index d8dc8225576a..b62fcd33e586 100644
--- a/sound/soc/au1x/db1200.c
+++ b/sound/soc/au1x/db1200.c
@@ -27,10 +27,10 @@
 static struct snd_soc_dai_link db1200_ac97_dai = {
 	.name		= "AC97",
 	.stream_name	= "AC97 HiFi",
-	.cpu_dai_name	= "au1xpsc-ac97",
 	.codec_dai_name	= "ac97-hifi",
-	.platform_name	=  "au1xpsc-pcm-audio",
-	.codec_name	= "ac97-codec",
+	.cpu_dai_name	= "au1xpsc_ac97.1",
+	.platform_name	= "au1xpsc-pcm.1",
+	.codec_name	= "ac97-codec.1",
 };
 
 static struct snd_soc_card db1200_ac97_machine = {
@@ -75,10 +75,10 @@ static struct snd_soc_ops db1200_i2s_wm8731_ops = {
 static struct snd_soc_dai_link db1200_i2s_dai = {
 	.name		= "WM8731",
 	.stream_name	= "WM8731 PCM",
-	.cpu_dai_name	= "au1xpsc",
-	.codec_dai_name	= "wm8731-hifi"
-	.platform_name	= "au1xpsc-pcm-audio",
-	.codec_name	= "wm8731-codec.0-001a",
+	.codec_dai_name	= "wm8731-hifi",
+	.cpu_dai_name	= "au1xpsc_i2s.1",
+	.platform_name	= "au1xpsc-pcm.1",
+	.codec_name	= "wm8731-codec.0-001b",
 	.ops		= &db1200_i2s_wm8731_ops,
 };
 
@@ -97,7 +97,7 @@ static int __init db1200_audio_load(void)
 	int ret;
 
 	ret = -ENOMEM;
-	db1200_asoc_dev = platform_device_alloc("soc-audio", -1);
+	db1200_asoc_dev = platform_device_alloc("soc-audio", 1); /* PSC1 */
 	if (!db1200_asoc_dev)
 		goto out;
 
diff --git a/sound/soc/au1x/dbdma2.c b/sound/soc/au1x/dbdma2.c
index 00fdb9cbfc2d..10fdd2854e58 100644
--- a/sound/soc/au1x/dbdma2.c
+++ b/sound/soc/au1x/dbdma2.c
@@ -10,9 +10,6 @@
  *
  * DMA glue for Au1x-PSC audio.
  *
- * NOTE: all of these drivers can only work with a SINGLE instance
- *	 of a PSC. Multiple independent audio devices are impossible
- *	 with ASoC v1.
  */
 
 
@@ -61,9 +58,6 @@ struct au1xpsc_audio_dmadata {
 	int msbits;
 };
 
-/* instance data. There can be only one, MacLeod!!!! */
-static struct au1xpsc_audio_dmadata *au1xpsc_audio_pcmdma[2];
-
 /*
  * These settings are somewhat okay, at least on my machine audio plays
  * almost skip-free. Especially the 64kB buffer seems to help a LOT.
@@ -199,6 +193,14 @@ out:
 	return 0;
 }
 
+static inline struct au1xpsc_audio_dmadata *to_dmadata(struct snd_pcm_substream *ss)
+{
+	struct snd_soc_pcm_runtime *rtd = ss->private_data;
+	struct au1xpsc_audio_dmadata *pcd =
+				snd_soc_platform_get_drvdata(rtd->platform);
+	return &pcd[SUBSTREAM_TYPE(ss)];
+}
+
 static int au1xpsc_pcm_hw_params(struct snd_pcm_substream *substream,
 				 struct snd_pcm_hw_params *params)
 {
@@ -211,7 +213,7 @@ static int au1xpsc_pcm_hw_params(struct snd_pcm_substream *substream,
 		goto out;
 
 	stype = SUBSTREAM_TYPE(substream);
-	pcd = au1xpsc_audio_pcmdma[stype];
+	pcd = to_dmadata(substream);
 
 	DBG("runtime->dma_area = 0x%08lx dma_addr_t = 0x%08lx dma_size = %d "
 	    "runtime->min_align %d\n",
@@ -249,8 +251,7 @@ static int au1xpsc_pcm_hw_free(struct snd_pcm_substream *substream)
 
 static int au1xpsc_pcm_prepare(struct snd_pcm_substream *substream)
 {
-	struct au1xpsc_audio_dmadata *pcd =
-			au1xpsc_audio_pcmdma[SUBSTREAM_TYPE(substream)];
+	struct au1xpsc_audio_dmadata *pcd = to_dmadata(substream);
 
 	au1xxx_dbdma_reset(pcd->ddma_chan);
 
@@ -267,7 +268,7 @@ static int au1xpsc_pcm_prepare(struct snd_pcm_substream *substream)
 
 static int au1xpsc_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
 {
-	u32 c = au1xpsc_audio_pcmdma[SUBSTREAM_TYPE(substream)]->ddma_chan;
+	u32 c = to_dmadata(substream)->ddma_chan;
 
 	switch (cmd) {
 	case SNDRV_PCM_TRIGGER_START:
@@ -287,8 +288,7 @@ static int au1xpsc_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
 static snd_pcm_uframes_t
 au1xpsc_pcm_pointer(struct snd_pcm_substream *substream)
 {
-	return bytes_to_frames(substream->runtime,
-		au1xpsc_audio_pcmdma[SUBSTREAM_TYPE(substream)]->pos);
+	return bytes_to_frames(substream->runtime, to_dmadata(substream)->pos);
 }
 
 static int au1xpsc_pcm_open(struct snd_pcm_substream *substream)
@@ -299,7 +299,7 @@ static int au1xpsc_pcm_open(struct snd_pcm_substream *substream)
 
 static int au1xpsc_pcm_close(struct snd_pcm_substream *substream)
 {
-	au1x_pcm_dbdma_free(au1xpsc_audio_pcmdma[SUBSTREAM_TYPE(substream)]);
+	au1x_pcm_dbdma_free(to_dmadata(substream));
 	return 0;
 }
 
@@ -329,35 +329,21 @@ static int au1xpsc_pcm_new(struct snd_card *card,
 	return 0;
 }
 
-static int au1xpsc_pcm_probe(struct snd_soc_platform *platform)
-{
-	if (!au1xpsc_audio_pcmdma[PCM_TX] || !au1xpsc_audio_pcmdma[PCM_RX])
-		return -ENODEV;
-
-	return 0;
-}
-
 /* au1xpsc audio platform */
 struct snd_soc_platform_driver au1xpsc_soc_platform = {
-	.probe		= au1xpsc_pcm_probe,
 	.ops		= &au1xpsc_pcm_ops,
 	.pcm_new	= au1xpsc_pcm_new,
 	.pcm_free	= au1xpsc_pcm_free_dma_buffers,
 };
-EXPORT_SYMBOL_GPL(au1xpsc_soc_platform);
 
 static int __devinit au1xpsc_pcm_drvprobe(struct platform_device *pdev)
 {
+	struct au1xpsc_audio_dmadata *dmadata;
 	struct resource *r;
 	int ret;
 
-	if (au1xpsc_audio_pcmdma[PCM_TX] || au1xpsc_audio_pcmdma[PCM_RX])
-		return -EBUSY;
-
-	/* TX DMA */
-	au1xpsc_audio_pcmdma[PCM_TX]
-		= kzalloc(sizeof(struct au1xpsc_audio_dmadata), GFP_KERNEL);
-	if (!au1xpsc_audio_pcmdma[PCM_TX])
+	dmadata = kzalloc(2 * sizeof(struct au1xpsc_audio_dmadata), GFP_KERNEL);
+	if (!dmadata)
 		return -ENOMEM;
 
 	r = platform_get_resource(pdev, IORESOURCE_DMA, 0);
@@ -365,54 +351,40 @@ static int __devinit au1xpsc_pcm_drvprobe(struct platform_device *pdev)
 		ret = -ENODEV;
 		goto out1;
 	}
-	(au1xpsc_audio_pcmdma[PCM_TX])->ddma_id = r->start;
+	dmadata[PCM_TX].ddma_id = r->start;
 
 	/* RX DMA */
-	au1xpsc_audio_pcmdma[PCM_RX]
-		= kzalloc(sizeof(struct au1xpsc_audio_dmadata), GFP_KERNEL);
-	if (!au1xpsc_audio_pcmdma[PCM_RX])
-		return -ENOMEM;
-
 	r = platform_get_resource(pdev, IORESOURCE_DMA, 1);
 	if (!r) {
 		ret = -ENODEV;
-		goto out2;
+		goto out1;
 	}
-	(au1xpsc_audio_pcmdma[PCM_RX])->ddma_id = r->start;
+	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;
 
-out2:
-	kfree(au1xpsc_audio_pcmdma[PCM_RX]);
-	au1xpsc_audio_pcmdma[PCM_RX] = NULL;
 out1:
-	kfree(au1xpsc_audio_pcmdma[PCM_TX]);
-	au1xpsc_audio_pcmdma[PCM_TX] = NULL;
+	kfree(dmadata);
 	return ret;
 }
 
 static int __devexit au1xpsc_pcm_drvremove(struct platform_device *pdev)
 {
-	int i;
+	struct au1xpsc_audio_dmadata *dmadata = platform_get_drvdata(pdev);
 
 	snd_soc_unregister_platform(&pdev->dev);
-
-	for (i = 0; i < 2; i++) {
-		if (au1xpsc_audio_pcmdma[i]) {
-			au1x_pcm_dbdma_free(au1xpsc_audio_pcmdma[i]);
-			kfree(au1xpsc_audio_pcmdma[i]);
-			au1xpsc_audio_pcmdma[i] = NULL;
-		}
-	}
+	kfree(dmadata);
 
 	return 0;
 }
 
 static struct platform_driver au1xpsc_pcm_driver = {
 	.driver	= {
-		.name	= "au1xpsc-pcm-audio",
+		.name	= "au1xpsc-pcm",
 		.owner	= THIS_MODULE,
 	},
 	.probe		= au1xpsc_pcm_drvprobe,
@@ -421,8 +393,6 @@ static struct platform_driver au1xpsc_pcm_driver = {
 
 static int __init au1xpsc_audio_dbdma_load(void)
 {
-	au1xpsc_audio_pcmdma[PCM_TX] = NULL;
-	au1xpsc_audio_pcmdma[PCM_RX] = NULL;
 	return platform_driver_register(&au1xpsc_pcm_driver);
 }
 
@@ -460,7 +430,7 @@ struct platform_device *au1xpsc_pcm_add(struct platform_device *pdev)
 	res[1].start = res[1].end = id[1];
 	res[0].flags = res[1].flags = IORESOURCE_DMA;
 
-	pd = platform_device_alloc("au1xpsc-pcm", -1);
+	pd = platform_device_alloc("au1xpsc-pcm", pdev->id);
 	if (!pd)
 		goto out;
 
diff --git a/sound/soc/au1x/psc-ac97.c b/sound/soc/au1x/psc-ac97.c
index 6a9516cbe424..d0db66f24a00 100644
--- a/sound/soc/au1x/psc-ac97.c
+++ b/sound/soc/au1x/psc-ac97.c
@@ -10,9 +10,6 @@
  *
  * Au1xxx-PSC AC97 glue.
  *
- * NOTE: all of these drivers can only work with a SINGLE instance
- *	 of a PSC. Multiple independent audio devices are impossible
- *	 with ASoC v1.
  */
 
 #include <linux/init.h>
@@ -56,12 +53,29 @@
 /* instance data. There can be only one, MacLeod!!!! */
 static struct au1xpsc_audio_data *au1xpsc_ac97_workdata;
 
+#if 0
+
+/* this could theoretically work, but ac97->bus->card->private_data can be NULL
+ * when snd_ac97_mixer() is called; I don't know if the rest further down the
+ * chain are always valid either.
+ */
+static inline struct au1xpsc_audio_data *ac97_to_pscdata(struct snd_ac97 *x)
+{
+	struct snd_soc_card *c = x->bus->card->private_data;
+	return snd_soc_dai_get_drvdata(c->rtd->cpu_dai);
+}
+
+#else
+
+#define ac97_to_pscdata(x)	au1xpsc_ac97_workdata
+
+#endif
+
 /* AC97 controller reads codec register */
 static unsigned short au1xpsc_ac97_read(struct snd_ac97 *ac97,
 					unsigned short reg)
 {
-	/* FIXME */
-	struct au1xpsc_audio_data *pscdata = au1xpsc_ac97_workdata;
+	struct au1xpsc_audio_data *pscdata = ac97_to_pscdata(ac97);
 	unsigned short retry, tmo;
 	unsigned long data;
 
@@ -102,8 +116,7 @@ static unsigned short au1xpsc_ac97_read(struct snd_ac97 *ac97,
 static void au1xpsc_ac97_write(struct snd_ac97 *ac97, unsigned short reg,
 				unsigned short val)
 {
-	/* FIXME */
-	struct au1xpsc_audio_data *pscdata = au1xpsc_ac97_workdata;
+	struct au1xpsc_audio_data *pscdata = ac97_to_pscdata(ac97);
 	unsigned int tmo, retry;
 
 	au_writel(PSC_AC97EVNT_CD, AC97_EVNT(pscdata));
@@ -134,8 +147,7 @@ static void au1xpsc_ac97_write(struct snd_ac97 *ac97, unsigned short reg,
 /* AC97 controller asserts a warm reset */
 static void au1xpsc_ac97_warm_reset(struct snd_ac97 *ac97)
 {
-	/* FIXME */
-	struct au1xpsc_audio_data *pscdata = au1xpsc_ac97_workdata;
+	struct au1xpsc_audio_data *pscdata = ac97_to_pscdata(ac97);
 
 	au_writel(PSC_AC97RST_SNC, AC97_RST(pscdata));
 	au_sync();
@@ -146,8 +158,7 @@ static void au1xpsc_ac97_warm_reset(struct snd_ac97 *ac97)
 
 static void au1xpsc_ac97_cold_reset(struct snd_ac97 *ac97)
 {
-	/* FIXME */
-	struct au1xpsc_audio_data *pscdata = au1xpsc_ac97_workdata;
+	struct au1xpsc_audio_data *pscdata = ac97_to_pscdata(ac97);
 	int i;
 
 	/* disable PSC during cold reset */
@@ -202,8 +213,7 @@ static int au1xpsc_ac97_hw_params(struct snd_pcm_substream *substream,
 				  struct snd_pcm_hw_params *params,
 				  struct snd_soc_dai *dai)
 {
-	/* FIXME */
-	struct au1xpsc_audio_data *pscdata = au1xpsc_ac97_workdata;
+	struct au1xpsc_audio_data *pscdata = snd_soc_dai_get_drvdata(dai);
 	unsigned long r, ro, stat;
 	int chans, t, stype = SUBSTREAM_TYPE(substream);
 
@@ -283,8 +293,7 @@ out:
 static int au1xpsc_ac97_trigger(struct snd_pcm_substream *substream,
 				int cmd, struct snd_soc_dai *dai)
 {
-	/* FIXME */
-	struct au1xpsc_audio_data *pscdata = au1xpsc_ac97_workdata;
+	struct au1xpsc_audio_data *pscdata = snd_soc_dai_get_drvdata(dai);
 	int ret, stype = SUBSTREAM_TYPE(substream);
 
 	ret = 0;
@@ -325,7 +334,7 @@ static struct snd_soc_dai_ops au1xpsc_ac97_dai_ops = {
 	.hw_params	= au1xpsc_ac97_hw_params,
 };
 
-struct snd_soc_dai_driver au1xpsc_ac97_dai = {
+static const struct snd_soc_dai_driver au1xpsc_ac97_dai_template = {
 	.ac97_control		= 1,
 	.probe			= au1xpsc_ac97_probe,
 	.playback = {
@@ -342,7 +351,6 @@ struct snd_soc_dai_driver au1xpsc_ac97_dai = {
 	},
 	.ops = &au1xpsc_ac97_dai_ops,
 };
-EXPORT_SYMBOL_GPL(au1xpsc_ac97_dai);
 
 static int __devinit au1xpsc_ac97_drvprobe(struct platform_device *pdev)
 {
@@ -351,9 +359,6 @@ static int __devinit au1xpsc_ac97_drvprobe(struct platform_device *pdev)
 	unsigned long sel;
 	struct au1xpsc_audio_data *wd;
 
-	if (au1xpsc_ac97_workdata)
-		return -EBUSY;
-
 	wd = kzalloc(sizeof(struct au1xpsc_audio_data), GFP_KERNEL);
 	if (!wd)
 		return -ENOMEM;
@@ -387,14 +392,20 @@ static int __devinit au1xpsc_ac97_drvprobe(struct platform_device *pdev)
 	au_writel(PSC_SEL_PS_AC97MODE | sel, PSC_SEL(wd));
 	au_sync();
 
-	ret = snd_soc_register_dai(&pdev->dev, &au1xpsc_ac97_dai);
+	/* name the DAI like this device instance ("au1xpsc-ac97.PSCINDEX") */
+	memcpy(&wd->dai_drv, &au1xpsc_ac97_dai_template,
+	       sizeof(struct snd_soc_dai_driver));
+	wd->dai_drv.name = dev_name(&pdev->dev);
+
+	platform_set_drvdata(pdev, wd);
+
+	ret = snd_soc_register_dai(&pdev->dev, &wd->dai_drv);
 	if (ret)
 		goto out1;
 
 	wd->dmapd = au1xpsc_pcm_add(pdev);
 	if (wd->dmapd) {
-		platform_set_drvdata(pdev, wd);
-		au1xpsc_ac97_workdata = wd;	/* MDEV */
+		au1xpsc_ac97_workdata = wd;
 		return 0;
 	}
 
@@ -477,7 +488,7 @@ static struct dev_pm_ops au1xpscac97_pmops = {
 
 static struct platform_driver au1xpsc_ac97_driver = {
 	.driver	= {
-		.name	= "au1xpsc-ac97",
+		.name	= "au1xpsc_ac97",
 		.owner	= THIS_MODULE,
 		.pm	= AU1XPSCAC97_PMOPS,
 	},
diff --git a/sound/soc/au1x/psc-i2s.c b/sound/soc/au1x/psc-i2s.c
index 94e560a8756d..fca091276320 100644
--- a/sound/soc/au1x/psc-i2s.c
+++ b/sound/soc/au1x/psc-i2s.c
@@ -10,9 +10,6 @@
  *
  * Au1xxx-PSC I2S glue.
  *
- * NOTE: all of these drivers can only work with a SINGLE instance
- *	 of a PSC. Multiple independent audio devices are impossible
- *	 with ASoC v1.
  * NOTE: so far only PSC slave mode (bit- and frameclock) is supported.
  */
 
@@ -54,13 +51,10 @@
 	((stype) == PCM_TX ? PSC_I2SPCR_TC : PSC_I2SPCR_RC)
 
 
-/* instance data. There can be only one, MacLeod!!!! */
-static struct au1xpsc_audio_data *au1xpsc_i2s_workdata;
-
 static int au1xpsc_i2s_set_fmt(struct snd_soc_dai *cpu_dai,
 			       unsigned int fmt)
 {
-	struct au1xpsc_audio_data *pscdata = au1xpsc_i2s_workdata;
+	struct au1xpsc_audio_data *pscdata = snd_soc_dai_get_drvdata(cpu_dai);
 	unsigned long ct;
 	int ret;
 
@@ -120,7 +114,7 @@ static int au1xpsc_i2s_hw_params(struct snd_pcm_substream *substream,
 				 struct snd_pcm_hw_params *params,
 				 struct snd_soc_dai *dai)
 {
-	struct au1xpsc_audio_data *pscdata = au1xpsc_i2s_workdata;
+	struct au1xpsc_audio_data *pscdata = snd_soc_dai_get_drvdata(dai);
 
 	int cfgbits;
 	unsigned long stat;
@@ -245,7 +239,7 @@ static int au1xpsc_i2s_stop(struct au1xpsc_audio_data *pscdata, int stype)
 static int au1xpsc_i2s_trigger(struct snd_pcm_substream *substream, int cmd,
 			       struct snd_soc_dai *dai)
 {
-	struct au1xpsc_audio_data *pscdata = au1xpsc_i2s_workdata;
+	struct au1xpsc_audio_data *pscdata = snd_soc_dai_get_drvdata(dai);
 	int ret, stype = SUBSTREAM_TYPE(substream);
 
 	switch (cmd) {
@@ -263,19 +257,13 @@ static int au1xpsc_i2s_trigger(struct snd_pcm_substream *substream, int cmd,
 	return ret;
 }
 
-static int au1xpsc_i2s_probe(struct snd_soc_dai *dai)
-{
-	return 	au1xpsc_i2s_workdata ? 0 : -ENODEV;
-}
-
 static struct snd_soc_dai_ops au1xpsc_i2s_dai_ops = {
 	.trigger	= au1xpsc_i2s_trigger,
 	.hw_params	= au1xpsc_i2s_hw_params,
 	.set_fmt	= au1xpsc_i2s_set_fmt,
 };
 
-static struct snd_soc_dai_driver au1xpsc_i2s_dai = {
-	.probe			= au1xpsc_i2s_probe,
+static const struct snd_soc_dai_driver au1xpsc_i2s_dai_template = {
 	.playback = {
 		.rates		= AU1XPSC_I2S_RATES,
 		.formats	= AU1XPSC_I2S_FMTS,
@@ -298,9 +286,6 @@ static int __devinit au1xpsc_i2s_drvprobe(struct platform_device *pdev)
 	int ret;
 	struct au1xpsc_audio_data *wd;
 
-	if (au1xpsc_i2s_workdata)
-		return -EBUSY;
-
 	wd = kzalloc(sizeof(struct au1xpsc_audio_data), GFP_KERNEL);
 	if (!wd)
 		return -ENOMEM;
@@ -337,17 +322,21 @@ static int __devinit au1xpsc_i2s_drvprobe(struct platform_device *pdev)
 	 * time out.
 	 */
 
-	ret = snd_soc_register_dai(&pdev->dev, &au1xpsc_i2s_dai);
+	/* name the DAI like this device instance ("au1xpsc-i2s.PSCINDEX") */
+	memcpy(&wd->dai_drv, &au1xpsc_i2s_dai_template,
+	       sizeof(struct snd_soc_dai_driver));
+	wd->dai_drv.name = dev_name(&pdev->dev);
+
+	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) {
-		platform_set_drvdata(pdev, wd);
-		au1xpsc_i2s_workdata = wd;
+	if (wd->dmapd)
 		return 0;
-	}
 
 	snd_soc_unregister_dai(&pdev->dev);
 out1:
@@ -376,8 +365,6 @@ static int __devexit au1xpsc_i2s_drvremove(struct platform_device *pdev)
 	release_mem_region(r->start, resource_size(r));
 	kfree(wd);
 
-	au1xpsc_i2s_workdata = NULL;	/* MDEV */
-
 	return 0;
 }
 
@@ -427,7 +414,7 @@ static struct dev_pm_ops au1xpsci2s_pmops = {
 
 static struct platform_driver au1xpsc_i2s_driver = {
 	.driver		= {
-		.name	= "au1xpsc",
+		.name	= "au1xpsc_i2s",
 		.owner	= THIS_MODULE,
 		.pm	= AU1XPSCI2S_PMOPS,
 	},
@@ -437,7 +424,6 @@ static struct platform_driver au1xpsc_i2s_driver = {
 
 static int __init au1xpsc_i2s_load(void)
 {
-	au1xpsc_i2s_workdata = NULL;
 	return platform_driver_register(&au1xpsc_i2s_driver);
 }
 
diff --git a/sound/soc/au1x/psc.h b/sound/soc/au1x/psc.h
index f281443fd52f..b30eadd422a7 100644
--- a/sound/soc/au1x/psc.h
+++ b/sound/soc/au1x/psc.h
@@ -8,16 +8,11 @@
  * it under the terms of the GNU General Public License version 2 as
  * published by the Free Software Foundation.
  *
- * NOTE: all of these drivers can only work with a SINGLE instance
- *	 of a PSC. Multiple independent audio devices are impossible
- *	 with ASoC v1.
  */
 
 #ifndef _AU1X_PCM_H
 #define _AU1X_PCM_H
 
-extern struct snd_ac97_bus_ops soc_ac97_ops;
-
 /* DBDMA helpers */
 extern struct platform_device *au1xpsc_pcm_add(struct platform_device *pdev);
 extern void au1xpsc_pcm_destroy(struct platform_device *dmapd);
@@ -28,6 +23,8 @@ struct au1xpsc_audio_data {
 	unsigned long cfg;
 	unsigned long rate;
 
+	struct snd_soc_dai_driver dai_drv;
+
 	unsigned long pm[2];
 	struct mutex lock;
 	struct platform_device *dmapd;