1 files changed, 153 insertions, 90 deletions

diff --git a/sound/soc/au1x/psc-ac97.c b/sound/soc/au1x/psc-ac97.c
index a521aa90dde..340311d7fed 100644
--- a/sound/soc/au1x/psc-ac97.c
+++ b/sound/soc/au1x/psc-ac97.c
@@ -61,7 +61,8 @@ static unsigned short au1xpsc_ac97_read(struct snd_ac97 *ac97,
 {
 	/* FIXME */
 	struct au1xpsc_audio_data *pscdata = au1xpsc_ac97_workdata;
-	unsigned short data, retry, tmo;
+	unsigned short retry, tmo;
+	unsigned long data;
 
 	au_writel(PSC_AC97EVNT_CD, AC97_EVNT(pscdata));
 	au_sync();
@@ -74,20 +75,26 @@ static unsigned short au1xpsc_ac97_read(struct snd_ac97 *ac97,
 			  AC97_CDC(pscdata));
 		au_sync();
 
-		tmo = 2000;
-		while ((!(au_readl(AC97_EVNT(pscdata)) & PSC_AC97EVNT_CD))
-			&& --tmo)
-			udelay(2);
+		tmo = 20;
+		do {
+			udelay(21);
+			if (au_readl(AC97_EVNT(pscdata)) & PSC_AC97EVNT_CD)
+				break;
+		} while (--tmo);
 
-		data = au_readl(AC97_CDC(pscdata)) & 0xffff;
+		data = au_readl(AC97_CDC(pscdata));
 
 		au_writel(PSC_AC97EVNT_CD, AC97_EVNT(pscdata));
 		au_sync();
 
 		mutex_unlock(&pscdata->lock);
+
+		if (reg != ((data >> 16) & 0x7f))
+			tmo = 1;	/* wrong register, try again */
+
 	} while (--retry && !tmo);
 
-	return retry ? data : 0xffff;
+	return retry ? data & 0xffff : 0xffff;
 }
 
 /* AC97 controller writes to codec register */
@@ -109,10 +116,12 @@ static void au1xpsc_ac97_write(struct snd_ac97 *ac97, unsigned short reg,
 			  AC97_CDC(pscdata));
 		au_sync();
 
-		tmo = 2000;
-		while ((!(au_readl(AC97_EVNT(pscdata)) & PSC_AC97EVNT_CD))
-		       && --tmo)
-			udelay(2);
+		tmo = 20;
+		do {
+			udelay(21);
+			if (au_readl(AC97_EVNT(pscdata)) & PSC_AC97EVNT_CD)
+				break;
+		} while (--tmo);
 
 		au_writel(PSC_AC97EVNT_CD, AC97_EVNT(pscdata));
 		au_sync();
@@ -195,7 +204,7 @@ static int au1xpsc_ac97_hw_params(struct snd_pcm_substream *substream,
 	/* FIXME */
 	struct au1xpsc_audio_data *pscdata = au1xpsc_ac97_workdata;
 	unsigned long r, ro, stat;
-	int chans, stype = SUBSTREAM_TYPE(substream);
+	int chans, t, stype = SUBSTREAM_TYPE(substream);
 
 	chans = params_channels(params);
 
@@ -237,8 +246,12 @@ static int au1xpsc_ac97_hw_params(struct snd_pcm_substream *substream,
 		au_sync();
 
 		/* ...wait for it... */
-		while (au_readl(AC97_STAT(pscdata)) & PSC_AC97STAT_DR)
-			asm volatile ("nop");
+		t = 100;
+		while ((au_readl(AC97_STAT(pscdata)) & PSC_AC97STAT_DR) && --t)
+			msleep(1);
+
+		if (!t)
+			printk(KERN_ERR "PSC-AC97: can't disable!\n");
 
 		/* ...write config... */
 		au_writel(r, AC97_CFG(pscdata));
@@ -249,8 +262,12 @@ static int au1xpsc_ac97_hw_params(struct snd_pcm_substream *substream,
 		au_sync();
 
 		/* ...and wait for ready bit */
-		while (!(au_readl(AC97_STAT(pscdata)) & PSC_AC97STAT_DR))
-			asm volatile ("nop");
+		t = 100;
+		while ((!(au_readl(AC97_STAT(pscdata)) & PSC_AC97STAT_DR)) && --t)
+			msleep(1);
+
+		if (!t)
+			printk(KERN_ERR "PSC-AC97: can't enable!\n");
 
 		mutex_unlock(&pscdata->lock);
 
@@ -300,19 +317,55 @@ static int au1xpsc_ac97_trigger(struct snd_pcm_substream *substream,
 static int au1xpsc_ac97_probe(struct platform_device *pdev,
 			      struct snd_soc_dai *dai)
 {
+	return au1xpsc_ac97_workdata ? 0 : -ENODEV;
+}
+
+static void au1xpsc_ac97_remove(struct platform_device *pdev,
+				struct snd_soc_dai *dai)
+{
+}
+
+static struct snd_soc_dai_ops au1xpsc_ac97_dai_ops = {
+	.trigger	= au1xpsc_ac97_trigger,
+	.hw_params	= au1xpsc_ac97_hw_params,
+};
+
+struct snd_soc_dai au1xpsc_ac97_dai = {
+	.name			= "au1xpsc_ac97",
+	.ac97_control		= 1,
+	.probe			= au1xpsc_ac97_probe,
+	.remove			= au1xpsc_ac97_remove,
+	.playback = {
+		.rates		= AC97_RATES,
+		.formats	= AC97_FMTS,
+		.channels_min	= 2,
+		.channels_max	= 2,
+	},
+	.capture = {
+		.rates		= AC97_RATES,
+		.formats	= AC97_FMTS,
+		.channels_min	= 2,
+		.channels_max	= 2,
+	},
+	.ops = &au1xpsc_ac97_dai_ops,
+};
+EXPORT_SYMBOL_GPL(au1xpsc_ac97_dai);
+
+static int __devinit au1xpsc_ac97_drvprobe(struct platform_device *pdev)
+{
 	int ret;
 	struct resource *r;
 	unsigned long sel;
+	struct au1xpsc_audio_data *wd;
 
 	if (au1xpsc_ac97_workdata)
 		return -EBUSY;
 
-	au1xpsc_ac97_workdata =
-		kzalloc(sizeof(struct au1xpsc_audio_data), GFP_KERNEL);
-	if (!au1xpsc_ac97_workdata)
+	wd = kzalloc(sizeof(struct au1xpsc_audio_data), GFP_KERNEL);
+	if (!wd)
 		return -ENOMEM;
 
-	mutex_init(&au1xpsc_ac97_workdata->lock);
+	mutex_init(&wd->lock);
 
 	r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 	if (!r) {
@@ -321,81 +374,95 @@ static int au1xpsc_ac97_probe(struct platform_device *pdev,
 	}
 
 	ret = -EBUSY;
-	au1xpsc_ac97_workdata->ioarea =
-		request_mem_region(r->start, r->end - r->start + 1,
+	wd->ioarea = request_mem_region(r->start, r->end - r->start + 1,
 					"au1xpsc_ac97");
-	if (!au1xpsc_ac97_workdata->ioarea)
+	if (!wd->ioarea)
 		goto out0;
 
-	au1xpsc_ac97_workdata->mmio = ioremap(r->start, 0xffff);
-	if (!au1xpsc_ac97_workdata->mmio)
+	wd->mmio = ioremap(r->start, 0xffff);
+	if (!wd->mmio)
 		goto out1;
 
 	/* configuration: max dma trigger threshold, enable ac97 */
-	au1xpsc_ac97_workdata->cfg = PSC_AC97CFG_RT_FIFO8 |
-				     PSC_AC97CFG_TT_FIFO8 |
-				     PSC_AC97CFG_DE_ENABLE;
+	wd->cfg = PSC_AC97CFG_RT_FIFO8 | PSC_AC97CFG_TT_FIFO8 |
+		  PSC_AC97CFG_DE_ENABLE;
 
-	/* preserve PSC clock source set up by platform (dev.platform_data
-	 * is already occupied by soc layer)
-	 */
-	sel = au_readl(PSC_SEL(au1xpsc_ac97_workdata)) & PSC_SEL_CLK_MASK;
-	au_writel(PSC_CTRL_DISABLE, PSC_CTRL(au1xpsc_ac97_workdata));
+	/* preserve PSC clock source set up by platform	 */
+	sel = au_readl(PSC_SEL(wd)) & PSC_SEL_CLK_MASK;
+	au_writel(PSC_CTRL_DISABLE, PSC_CTRL(wd));
 	au_sync();
-	au_writel(0, PSC_SEL(au1xpsc_ac97_workdata));
+	au_writel(0, PSC_SEL(wd));
 	au_sync();
-	au_writel(PSC_SEL_PS_AC97MODE | sel, PSC_SEL(au1xpsc_ac97_workdata));
+	au_writel(PSC_SEL_PS_AC97MODE | sel, PSC_SEL(wd));
 	au_sync();
-	/* next up: cold reset.  Dont check for PSC-ready now since
-	 * there may not be any codec clock yet.
-	 */
 
-	return 0;
+	ret = snd_soc_register_dai(&au1xpsc_ac97_dai);
+	if (ret)
+		goto out1;
 
+	wd->dmapd = au1xpsc_pcm_add(pdev);
+	if (wd->dmapd) {
+		platform_set_drvdata(pdev, wd);
+		au1xpsc_ac97_workdata = wd;	/* MDEV */
+		return 0;
+	}
+
+	snd_soc_unregister_dai(&au1xpsc_ac97_dai);
 out1:
-	release_resource(au1xpsc_ac97_workdata->ioarea);
-	kfree(au1xpsc_ac97_workdata->ioarea);
+	release_resource(wd->ioarea);
+	kfree(wd->ioarea);
 out0:
-	kfree(au1xpsc_ac97_workdata);
-	au1xpsc_ac97_workdata = NULL;
+	kfree(wd);
 	return ret;
 }
 
-static void au1xpsc_ac97_remove(struct platform_device *pdev,
-				struct snd_soc_dai *dai)
+static int __devexit au1xpsc_ac97_drvremove(struct platform_device *pdev)
 {
+	struct au1xpsc_audio_data *wd = platform_get_drvdata(pdev);
+
+	if (wd->dmapd)
+		au1xpsc_pcm_destroy(wd->dmapd);
+
+	snd_soc_unregister_dai(&au1xpsc_ac97_dai);
+
 	/* disable PSC completely */
-	au_writel(0, AC97_CFG(au1xpsc_ac97_workdata));
+	au_writel(0, AC97_CFG(wd));
 	au_sync();
-	au_writel(PSC_CTRL_DISABLE, PSC_CTRL(au1xpsc_ac97_workdata));
+	au_writel(PSC_CTRL_DISABLE, PSC_CTRL(wd));
 	au_sync();
 
-	iounmap(au1xpsc_ac97_workdata->mmio);
-	release_resource(au1xpsc_ac97_workdata->ioarea);
-	kfree(au1xpsc_ac97_workdata->ioarea);
-	kfree(au1xpsc_ac97_workdata);
-	au1xpsc_ac97_workdata = NULL;
+	iounmap(wd->mmio);
+	release_resource(wd->ioarea);
+	kfree(wd->ioarea);
+	kfree(wd);
+
+	au1xpsc_ac97_workdata = NULL;	/* MDEV */
+
+	return 0;
 }
 
-static int au1xpsc_ac97_suspend(struct snd_soc_dai *dai)
+#ifdef CONFIG_PM
+static int au1xpsc_ac97_drvsuspend(struct device *dev)
 {
+	struct au1xpsc_audio_data *wd = dev_get_drvdata(dev);
+
 	/* save interesting registers and disable PSC */
-	au1xpsc_ac97_workdata->pm[0] =
-			au_readl(PSC_SEL(au1xpsc_ac97_workdata));
+	wd->pm[0] = au_readl(PSC_SEL(wd));
 
-	au_writel(0, AC97_CFG(au1xpsc_ac97_workdata));
+	au_writel(0, AC97_CFG(wd));
 	au_sync();
-	au_writel(PSC_CTRL_DISABLE, PSC_CTRL(au1xpsc_ac97_workdata));
+	au_writel(PSC_CTRL_DISABLE, PSC_CTRL(wd));
 	au_sync();
 
 	return 0;
 }
 
-static int au1xpsc_ac97_resume(struct snd_soc_dai *dai)
+static int au1xpsc_ac97_drvresume(struct device *dev)
 {
+	struct au1xpsc_audio_data *wd = dev_get_drvdata(dev);
+
 	/* restore PSC clock config */
-	au_writel(au1xpsc_ac97_workdata->pm[0] | PSC_SEL_PS_AC97MODE,
-			PSC_SEL(au1xpsc_ac97_workdata));
+	au_writel(wd->pm[0] | PSC_SEL_PS_AC97MODE, PSC_SEL(wd));
 	au_sync();
 
 	/* after this point the ac97 core will cold-reset the codec.
@@ -405,48 +472,44 @@ static int au1xpsc_ac97_resume(struct snd_soc_dai *dai)
 	return 0;
 }
 
-static struct snd_soc_dai_ops au1xpsc_ac97_dai_ops = {
-	.trigger	= au1xpsc_ac97_trigger,
-	.hw_params	= au1xpsc_ac97_hw_params,
+static struct dev_pm_ops au1xpscac97_pmops = {
+	.suspend	= au1xpsc_ac97_drvsuspend,
+	.resume		= au1xpsc_ac97_drvresume,
 };
 
-struct snd_soc_dai au1xpsc_ac97_dai = {
-	.name			= "au1xpsc_ac97",
-	.ac97_control		= 1,
-	.probe			= au1xpsc_ac97_probe,
-	.remove			= au1xpsc_ac97_remove,
-	.suspend		= au1xpsc_ac97_suspend,
-	.resume			= au1xpsc_ac97_resume,
-	.playback = {
-		.rates		= AC97_RATES,
-		.formats	= AC97_FMTS,
-		.channels_min	= 2,
-		.channels_max	= 2,
-	},
-	.capture = {
-		.rates		= AC97_RATES,
-		.formats	= AC97_FMTS,
-		.channels_min	= 2,
-		.channels_max	= 2,
+#define AU1XPSCAC97_PMOPS &au1xpscac97_pmops
+
+#else
+
+#define AU1XPSCAC97_PMOPS NULL
+
+#endif
+
+static struct platform_driver au1xpsc_ac97_driver = {
+	.driver	= {
+		.name	= "au1xpsc_ac97",
+		.owner	= THIS_MODULE,
+		.pm	= AU1XPSCAC97_PMOPS,
 	},
-	.ops = &au1xpsc_ac97_dai_ops,
+	.probe		= au1xpsc_ac97_drvprobe,
+	.remove		= __devexit_p(au1xpsc_ac97_drvremove),
 };
-EXPORT_SYMBOL_GPL(au1xpsc_ac97_dai);
 
-static int __init au1xpsc_ac97_init(void)
+static int __init au1xpsc_ac97_load(void)
 {
 	au1xpsc_ac97_workdata = NULL;
-	return snd_soc_register_dai(&au1xpsc_ac97_dai);
+	return platform_driver_register(&au1xpsc_ac97_driver);
 }
 
-static void __exit au1xpsc_ac97_exit(void)
+static void __exit au1xpsc_ac97_unload(void)
 {
-	snd_soc_unregister_dai(&au1xpsc_ac97_dai);
+	platform_driver_unregister(&au1xpsc_ac97_driver);
 }
 
-module_init(au1xpsc_ac97_init);
-module_exit(au1xpsc_ac97_exit);
+module_init(au1xpsc_ac97_load);
+module_exit(au1xpsc_ac97_unload);
 
 MODULE_LICENSE("GPL");
 MODULE_DESCRIPTION("Au12x0/Au1550 PSC AC97 ALSA ASoC audio driver");
-MODULE_AUTHOR("Manuel Lauss <manuel.lauss@gmail.com>");
+MODULE_AUTHOR("Manuel Lauss");
+