MIPS/SOUND: Alchemy: DB1200 AC97+I2S audio support.

Machine driver for DB1200 AC97 and I2S audio systems, intended as a proper
reference asoc machine for Alchemy-based systems.  AC97/I2S can be selected
at boot time by setting switch S6.7.

Signed-off-by: Manuel Lauss <manuel.lauss@gmail.com>
Cc: Linux-MIPS <linux-mips@linux-mips.org>
Cc: alsa-devel@alsa-project.org
Cc: Mark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

1 files changed, 141 insertions, 0 deletions

diff --git a/sound/soc/au1x/db1200.c b/sound/soc/au1x/db1200.c
new file mode 100644
index 000000000000..cdf7be1b9b91
--- /dev/null
+++ b/sound/soc/au1x/db1200.c
@@ -0,0 +1,141 @@
+/*
+ * DB1200 ASoC audio fabric support code.
+ *
+ * (c) 2008-9 Manuel Lauss <manuel.lauss@gmail.com>
+ *
+ */
+
+#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 <asm/mach-db1x00/bcsr.h>
+
+#include "../codecs/ac97.h"
+#include "../codecs/wm8731.h"
+#include "psc.h"
+
+/*-------------------------  AC97 PART  ---------------------------*/
+
+static struct snd_soc_dai_link db1200_ac97_dai = {
+	.name		= "AC97",
+	.stream_name	= "AC97 HiFi",
+	.cpu_dai	= &au1xpsc_ac97_dai,
+	.codec_dai	= &ac97_dai,
+};
+
+static struct snd_soc_card db1200_ac97_machine = {
+	.name		= "DB1200_AC97",
+	.dai_link	= &db1200_ac97_dai,
+	.num_links	= 1,
+	.platform	= &au1xpsc_soc_platform,
+};
+
+static struct snd_soc_device db1200_ac97_devdata = {
+	.card		= &db1200_ac97_machine,
+	.codec_dev	= &soc_codec_dev_ac97,
+};
+
+/*-------------------------  I2S PART  ---------------------------*/
+
+static int db1200_i2s_startup(struct snd_pcm_substream *substream)
+{
+	struct snd_soc_pcm_runtime *rtd = substream->private_data;
+	struct snd_soc_dai *codec_dai = rtd->dai->codec_dai;
+	struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
+	int ret;
+
+	/* WM8731 has its own 12MHz crystal */
+	snd_soc_dai_set_sysclk(codec_dai, WM8731_SYSCLK,
+				12000000, SND_SOC_CLOCK_IN);
+
+	/* codec is bitclock and lrclk master */
+	ret = snd_soc_dai_set_fmt(codec_dai, SND_SOC_DAIFMT_LEFT_J |
+			SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBM_CFM);
+	if (ret < 0)
+		goto out;
+
+	ret = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_LEFT_J |
+			SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBM_CFM);
+	if (ret < 0)
+		goto out;
+
+	ret = 0;
+out:
+	return ret;
+}
+
+static struct snd_soc_ops db1200_i2s_wm8731_ops = {
+	.startup	= db1200_i2s_startup,
+};
+
+static struct snd_soc_dai_link db1200_i2s_dai = {
+	.name		= "WM8731",
+	.stream_name	= "WM8731 PCM",
+	.cpu_dai	= &au1xpsc_i2s_dai,
+	.codec_dai	= &wm8731_dai,
+	.ops		= &db1200_i2s_wm8731_ops,
+};
+
+static struct snd_soc_card db1200_i2s_machine = {
+	.name		= "DB1200_I2S",
+	.dai_link	= &db1200_i2s_dai,
+	.num_links	= 1,
+	.platform	= &au1xpsc_soc_platform,
+};
+
+static struct snd_soc_device db1200_i2s_devdata = {
+	.card		= &db1200_i2s_machine,
+	.codec_dev	= &soc_codec_dev_wm8731,
+};
+
+/*-------------------------  COMMON PART  ---------------------------*/
+
+static struct platform_device *db1200_asoc_dev;
+
+static int __init db1200_audio_load(void)
+{
+	int ret;
+
+	ret = -ENOMEM;
+	db1200_asoc_dev = platform_device_alloc("soc-audio", -1);
+	if (!db1200_asoc_dev)
+		goto out;
+
+	/* 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_devdata);
+	else
+		platform_set_drvdata(db1200_asoc_dev, &db1200_ac97_devdata);
+
+	db1200_ac97_devdata.dev = &db1200_asoc_dev->dev;
+	db1200_i2s_devdata.dev = &db1200_asoc_dev->dev;
+	ret = platform_device_add(db1200_asoc_dev);
+
+	if (ret) {
+		platform_device_put(db1200_asoc_dev);
+		db1200_asoc_dev = NULL;
+	}
+out:
+	return ret;
+}
+
+static void __exit db1200_audio_unload(void)
+{
+	platform_device_unregister(db1200_asoc_dev);
+}
+
+module_init(db1200_audio_load);
+module_exit(db1200_audio_unload);
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("DB1200 ASoC audio support");
+MODULE_AUTHOR("Manuel Lauss");