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: NMark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: NLiam Girdwood <lrg@ti.com>

sound/soc/codecs/Kconfig

@@ -53,6 +53,7 @@ config SND_SOC_ALL_CODECS
 	select SND_SOC_UDA134X
 	select SND_SOC_UDA1380 if I2C
 	select SND_SOC_WL1273 if MFD_WL1273_CORE
+	select SND_SOC_WM1250_EV1 if I2C
 	select SND_SOC_WM2000 if I2C
 	select SND_SOC_WM8350 if MFD_WM8350
 	select SND_SOC_WM8400 if MFD_WM8400
@@ -246,6 +247,9 @@ config SND_SOC_UDA1380
 config SND_SOC_WL1273
 	tristate
 
+config SND_SOC_WM1250_EV1
+	tristate
+
 config SND_SOC_WM8350
 	tristate
 

sound/soc/codecs/Makefile

@@ -38,6 +38,7 @@ snd-soc-twl6040-objs := twl6040.o
 snd-soc-uda134x-objs := uda134x.o
 snd-soc-uda1380-objs := uda1380.o
 snd-soc-wl1273-objs := wl1273.o
+snd-soc-wm1250-ev1-objs := wm1250-ev1.o
 snd-soc-wm8350-objs := wm8350.o
 snd-soc-wm8400-objs := wm8400.o
 snd-soc-wm8510-objs := wm8510.o
@@ -128,6 +129,7 @@ obj-$(CONFIG_SND_SOC_TWL6040)	+= snd-soc-twl6040.o
 obj-$(CONFIG_SND_SOC_UDA134X)	+= snd-soc-uda134x.o
 obj-$(CONFIG_SND_SOC_UDA1380)	+= snd-soc-uda1380.o
 obj-$(CONFIG_SND_SOC_WL1273)	+= snd-soc-wl1273.o
+obj-$(CONFIG_SND_SOC_WM1250_EV1) += snd-soc-wm1250-ev1.o
 obj-$(CONFIG_SND_SOC_WM8350)	+= snd-soc-wm8350.o
 obj-$(CONFIG_SND_SOC_WM8400)	+= snd-soc-wm8400.o
 obj-$(CONFIG_SND_SOC_WM8510)	+= snd-soc-wm8510.o

sound/soc/codecs/wm1250-ev1.c

+/*
+ * 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");