ALSA: ASoC: Au12x0/Au1550 PSC Audio support

Audio for Au12x0/Au1550 PSCs in AC97 and I2S mode, for ASoC v1 framework.

- DBDMA, AC97 and I2S drivers
- sample AC97 machine code (Db1200)

Signed-off-by: Manuel Lauss <mano@roarinelk.homelinux.net>
Signed-off-by: Liam Girdwood <lg@opensource.wolfsonmicro.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>

1 files changed, 144 insertions, 0 deletions

diff --git a/sound/soc/au1x/sample-ac97.c b/sound/soc/au1x/sample-ac97.c
new file mode 100644
index 00000000000..f75ae7f62c3
--- /dev/null
+++ b/sound/soc/au1x/sample-ac97.c
@@ -0,0 +1,144 @@
+/*
+ * Sample Au12x0/Au1550 PSC AC97 sound machine.
+ *
+ * Copyright (c) 2007-2008 Manuel Lauss <mano@roarinelk.homelinux.net>
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms outlined in the file COPYING at the root of this
+ *  source archive.
+ *
+ * This is a very generic AC97 sound machine driver for boards which
+ * have (AC97) audio at PSC1 (e.g. DB1200 demoboards).
+ */
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/timer.h>
+#include <linux/interrupt.h>
+#include <linux/platform_device.h>
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/soc.h>
+#include <sound/soc-dapm.h>
+#include <asm/mach-au1x00/au1000.h>
+#include <asm/mach-au1x00/au1xxx_psc.h>
+#include <asm/mach-au1x00/au1xxx_dbdma.h>
+
+#include "../codecs/ac97.h"
+#include "psc.h"
+
+static int au1xpsc_sample_ac97_init(struct snd_soc_codec *codec)
+{
+	snd_soc_dapm_sync(codec);
+	return 0;
+}
+
+static struct snd_soc_dai_link au1xpsc_sample_ac97_dai = {
+	.name		= "AC97",
+	.stream_name	= "AC97 HiFi",
+	.cpu_dai	= &au1xpsc_ac97_dai,	/* see psc-ac97.c */
+	.codec_dai	= &ac97_dai,		/* see codecs/ac97.c */
+	.init		= au1xpsc_sample_ac97_init,
+	.ops		= NULL,
+};
+
+static struct snd_soc_machine au1xpsc_sample_ac97_machine = {
+	.name		= "Au1xxx PSC AC97 Audio",
+	.dai_link	= &au1xpsc_sample_ac97_dai,
+	.num_links	= 1,
+};
+
+static struct snd_soc_device au1xpsc_sample_ac97_devdata = {
+	.machine	= &au1xpsc_sample_ac97_machine,
+	.platform	= &au1xpsc_soc_platform, /* see dbdma2.c */
+	.codec_dev	= &soc_codec_dev_ac97,
+};
+
+static struct resource au1xpsc_psc1_res[] = {
+	[0] = {
+		.start	= CPHYSADDR(PSC1_BASE_ADDR),
+		.end	= CPHYSADDR(PSC1_BASE_ADDR) + 0x000fffff,
+		.flags	= IORESOURCE_MEM,
+	},
+	[1] = {
+#ifdef CONFIG_SOC_AU1200
+		.start	= AU1200_PSC1_INT,
+		.end	= AU1200_PSC1_INT,
+#elif defined(CONFIG_SOC_AU1550)
+		.start	= AU1550_PSC1_INT,
+		.end	= AU1550_PSC1_INT,
+#endif
+		.flags	= IORESOURCE_IRQ,
+	},
+	[2] = {
+		.start	= DSCR_CMD0_PSC1_TX,
+		.end	= DSCR_CMD0_PSC1_TX,
+		.flags	= IORESOURCE_DMA,
+	},
+	[3] = {
+		.start	= DSCR_CMD0_PSC1_RX,
+		.end	= DSCR_CMD0_PSC1_RX,
+		.flags	= IORESOURCE_DMA,
+	},
+};
+
+static struct platform_device *au1xpsc_sample_ac97_dev;
+
+static int __init au1xpsc_sample_ac97_load(void)
+{
+	int ret;
+
+#ifdef CONFIG_SOC_AU1200
+	unsigned long io;
+
+	/* modify sys_pinfunc for AC97 on PSC1 */
+	io = au_readl(SYS_PINFUNC);
+	io |= SYS_PINFUNC_P1C;
+	io &= ~(SYS_PINFUNC_P1A | SYS_PINFUNC_P1B);
+	au_writel(io, SYS_PINFUNC);
+	au_sync();
+#endif
+
+	ret = -ENOMEM;
+
+	/* setup PSC clock source for AC97 part: external clock provided
+	 * by codec.  The psc-ac97.c driver depends on this setting!
+	 */
+	au_writel(PSC_SEL_CLK_SERCLK, PSC1_BASE_ADDR + PSC_SEL_OFFSET);
+	au_sync();
+
+	au1xpsc_sample_ac97_dev = platform_device_alloc("soc-audio", -1);
+	if (!au1xpsc_sample_ac97_dev)
+		goto out;
+
+	au1xpsc_sample_ac97_dev->resource =
+		kmemdup(au1xpsc_psc1_res, sizeof(struct resource) *
+			ARRAY_SIZE(au1xpsc_psc1_res), GFP_KERNEL);
+	au1xpsc_sample_ac97_dev->num_resources = ARRAY_SIZE(au1xpsc_psc1_res);
+	au1xpsc_sample_ac97_dev->id = 1;
+
+	platform_set_drvdata(au1xpsc_sample_ac97_dev,
+			     &au1xpsc_sample_ac97_devdata);
+	au1xpsc_sample_ac97_devdata.dev = &au1xpsc_sample_ac97_dev->dev;
+	ret = platform_device_add(au1xpsc_sample_ac97_dev);
+
+	if (ret) {
+		platform_device_put(au1xpsc_sample_ac97_dev);
+		au1xpsc_sample_ac97_dev = NULL;
+	}
+
+out:
+	return ret;
+}
+
+static void __exit au1xpsc_sample_ac97_exit(void)
+{
+	platform_device_unregister(au1xpsc_sample_ac97_dev);
+}
+
+module_init(au1xpsc_sample_ac97_load);
+module_exit(au1xpsc_sample_ac97_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("Au1xxx PSC sample AC97 machine");
+MODULE_AUTHOR("Manuel Lauss <mano@roarinelk.homelinux.net>");