ASoC: Add initial WM1250-EV1 Springbank audio I/O module driver

The WM1250-EV1 Springbank audio I/O module for the Wolfson Glenfarclas
reference platform provides a simple audio I/O with an independant clock
domain, intended to simulate cellular modem and bluetooth subsystems
within the platform.

The card supports some limited GPIO based control but this is currently not
implemented.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: Liam Girdwood <lrg@ti.com>

1 files changed, 108 insertions, 0 deletions

diff --git a/sound/soc/codecs/wm1250-ev1.c b/sound/soc/codecs/wm1250-ev1.c
new file mode 100644
index 00000000000..9cf699e165e
--- /dev/null
+++ b/sound/soc/codecs/wm1250-ev1.c
@@ -0,0 +1,108 @@
+/*
+ * Driver for the 1250-EV1 audio I/O module
+ *
+ * Copyright 2011 Wolfson Microelectronics plc
+ *
+ *  This program is free software; you can redistribute  it and/or modify it
+ *  under  the terms of  the GNU General  Public License as published by the
+ *  Free Software Foundation;  either version 2 of the  License, or (at your
+ *  option) any later version.
+ *
+ */
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/i2c.h>
+
+#include <sound/soc.h>
+#include <sound/soc-dapm.h>
+
+static const struct snd_soc_dapm_widget wm1250_ev1_dapm_widgets[] = {
+SND_SOC_DAPM_ADC("ADC", "wm1250-ev1 Capture", SND_SOC_NOPM, 0, 0),
+SND_SOC_DAPM_DAC("DAC", "wm1250-ev1 Playback", SND_SOC_NOPM, 0, 0),
+
+SND_SOC_DAPM_INPUT("WM1250 Input"),
+SND_SOC_DAPM_INPUT("WM1250 Output"),
+};
+
+static const struct snd_soc_dapm_route wm1250_ev1_dapm_routes[] = {
+	{ "ADC", NULL, "WM1250 Input" },
+	{ "WM1250 Output", NULL, "DAC" },
+};
+
+static struct snd_soc_dai_driver wm1250_ev1_dai = {
+	.name = "wm1250-ev1",
+	.playback = {
+		.stream_name = "Playback",
+		.channels_min = 1,
+		.channels_max = 1,
+		.rates = SNDRV_PCM_RATE_8000,
+		.formats = SNDRV_PCM_FMTBIT_S16_LE,
+	},
+	.capture = {
+		.stream_name = "Capture",
+		.channels_min = 1,
+		.channels_max = 1,
+		.rates = SNDRV_PCM_RATE_8000,
+		.formats = SNDRV_PCM_FMTBIT_S16_LE,
+	},
+};
+
+static struct snd_soc_codec_driver soc_codec_dev_wm1250_ev1 = {
+	.dapm_widgets = wm1250_ev1_dapm_widgets,
+	.num_dapm_widgets = ARRAY_SIZE(wm1250_ev1_dapm_widgets),
+	.dapm_routes = wm1250_ev1_dapm_routes,
+	.num_dapm_routes = ARRAY_SIZE(wm1250_ev1_dapm_routes),
+};
+
+static int __devinit wm1250_ev1_probe(struct i2c_client *i2c,
+				      const struct i2c_device_id *id)
+{
+	return snd_soc_register_codec(&i2c->dev, &soc_codec_dev_wm1250_ev1,
+				      &wm1250_ev1_dai, 1);
+}
+
+static int __devexit wm1250_ev1_remove(struct i2c_client *i2c)
+{
+	snd_soc_unregister_codec(&i2c->dev);
+
+	return 0;
+}
+
+static const struct i2c_device_id wm1250_ev1_i2c_id[] = {
+	{ "wm1250-ev1", 0 },
+	{ }
+};
+MODULE_DEVICE_TABLE(i2c, wm1250_ev1__id);
+
+static struct i2c_driver wm1250_ev1_i2c_driver = {
+	.driver = {
+		.name = "wm1250-ev1",
+		.owner = THIS_MODULE,
+	},
+	.probe =    wm1250_ev1_probe,
+	.remove =   __devexit_p(wm1250_ev1_remove),
+	.id_table = wm1250_ev1_i2c_id,
+};
+
+static int __init wm1250_ev1_modinit(void)
+{
+	int ret = 0;
+
+	ret = i2c_add_driver(&wm1250_ev1_i2c_driver);
+	if (ret != 0)
+		pr_err("Failed to register WM1250-EV1 I2C driver: %d\n", ret);
+
+	return ret;
+}
+module_init(wm1250_ev1_modinit);
+
+static void __exit wm1250_ev1_exit(void)
+{
+	i2c_del_driver(&wm1250_ev1_i2c_driver);
+}
+module_exit(wm1250_ev1_exit);
+
+MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
+MODULE_DESCRIPTION("WM1250-EV1 audio I/O module driver");
+MODULE_LICENSE("GPL");