ASoC: Add support for the WM8727 DAC.

Add support for the Wolfson Microelectronics WM8727 DAC, this is a simple
non-configurable DAC.

Signed-off-by: Neil Jones <neil.jones@imgtec.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

4 files changed, 170 insertions, 0 deletions

diff --git a/sound/soc/codecs/Kconfig b/sound/soc/codecs/Kconfig
index 3df3497335bf..4a3e8dcf24d9 100644
--- a/sound/soc/codecs/Kconfig
+++ b/sound/soc/codecs/Kconfig
@@ -40,6 +40,7 @@ config SND_SOC_ALL_CODECS
         select SND_SOC_WM8523 if I2C
         select SND_SOC_WM8580 if I2C
         select SND_SOC_WM8711 if SND_SOC_I2C_AND_SPI
+        select SND_SOC_WM8727
         select SND_SOC_WM8728 if SND_SOC_I2C_AND_SPI
         select SND_SOC_WM8731 if SND_SOC_I2C_AND_SPI
         select SND_SOC_WM8750 if SND_SOC_I2C_AND_SPI
@@ -174,6 +175,9 @@ config SND_SOC_WM8580
 config SND_SOC_WM8711
         tristate
 
+config SND_SOC_WM8727
+        tristate
+
 config SND_SOC_WM8728
         tristate
 
diff --git a/sound/soc/codecs/Makefile b/sound/soc/codecs/Makefile
index 8f519ee9600d..cacfc7692d7f 100644
--- a/sound/soc/codecs/Makefile
+++ b/sound/soc/codecs/Makefile
@@ -27,6 +27,7 @@ snd-soc-wm8510-objs := wm8510.o
 snd-soc-wm8523-objs := wm8523.o
 snd-soc-wm8580-objs := wm8580.o
 snd-soc-wm8711-objs := wm8711.o
+snd-soc-wm8727-objs := wm8727.o
 snd-soc-wm8728-objs := wm8728.o
 snd-soc-wm8731-objs := wm8731.o
 snd-soc-wm8750-objs := wm8750.o
@@ -81,6 +82,7 @@ obj-$(CONFIG_SND_SOC_WM8510)	+= snd-soc-wm8510.o
 obj-$(CONFIG_SND_SOC_WM8523)    += snd-soc-wm8523.o
 obj-$(CONFIG_SND_SOC_WM8580)    += snd-soc-wm8580.o
 obj-$(CONFIG_SND_SOC_WM8711)    += snd-soc-wm8711.o
+obj-$(CONFIG_SND_SOC_WM8727)    += snd-soc-wm8727.o
 obj-$(CONFIG_SND_SOC_WM8728)    += snd-soc-wm8728.o
 obj-$(CONFIG_SND_SOC_WM8731)    += snd-soc-wm8731.o
 obj-$(CONFIG_SND_SOC_WM8750)    += snd-soc-wm8750.o
diff --git a/sound/soc/codecs/wm8727.c b/sound/soc/codecs/wm8727.c
new file mode 100644
index 000000000000..b3b60dd7bc14
--- /dev/null
+++ b/sound/soc/codecs/wm8727.c
@@ -0,0 +1,143 @@
+/*
+ * wm8727.c
+ *
+ *  Created on: 15-Oct-2009
+ *      Author: neil.jones@imgtec.com
+ *
+ * Copyright (C) 2009 Imagination Technologies Ltd.
+ *
+ *  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/kernel.h>
+#include <linux/device.h>
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/ac97_codec.h>
+#include <sound/initval.h>
+#include <sound/soc.h>
+
+#include "wm8727.h"
+/*
+ * Note this is a simple chip with no configuration interface, sample rate is
+ * determined automatically by examining the Master clock and Bit clock ratios
+ */
+#define WM8727_RATES  (SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 |\
+                        SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_96000 |\
+                        SNDRV_PCM_RATE_192000)
+
+
+struct snd_soc_dai wm8727_dai = {
+        .name = "WM8727",
+        .playback = {
+                .stream_name = "Playback",
+                .channels_min = 2,
+                .channels_max = 2,
+                .rates = WM8727_RATES,
+                .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE,
+                },
+};
+EXPORT_SYMBOL_GPL(wm8727_dai);
+
+static int wm8727_soc_probe(struct platform_device *pdev)
+{
+        struct snd_soc_device *socdev = platform_get_drvdata(pdev);
+        struct snd_soc_codec *codec;
+        int ret = 0;
+
+        codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL);
+        if (codec == NULL)
+                return -ENOMEM;
+        mutex_init(&codec->mutex);
+        codec->name = "WM8727";
+        codec->owner = THIS_MODULE;
+        codec->dai = &wm8727_dai;
+        codec->num_dai = 1;
+        socdev->card->codec = codec;
+        INIT_LIST_HEAD(&codec->dapm_widgets);
+        INIT_LIST_HEAD(&codec->dapm_paths);
+
+        /* register pcms */
+        ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
+        if (ret < 0) {
+                printk(KERN_ERR "wm8727: failed to create pcms\n");
+                goto pcm_err;
+        }
+        /* register card */
+        ret = snd_soc_init_card(socdev);
+        if (ret < 0) {
+                printk(KERN_ERR "wm8727: failed to register card\n");
+                goto register_err;
+        }
+
+        return ret;
+
+register_err:
+        snd_soc_free_pcms(socdev);
+pcm_err:
+        kfree(socdev->card->codec);
+        socdev->card->codec = NULL;
+        return ret;
+}
+
+static int wm8727_soc_remove(struct platform_device *pdev)
+{
+        struct snd_soc_device *socdev = platform_get_drvdata(pdev);
+        struct snd_soc_codec *codec = socdev->card->codec;
+
+        if (codec == NULL)
+                return 0;
+        snd_soc_free_pcms(socdev);
+        kfree(codec);
+        return 0;
+}
+
+struct snd_soc_codec_device soc_codec_dev_wm8727 = {
+        .probe =        wm8727_soc_probe,
+        .remove =       wm8727_soc_remove,
+};
+EXPORT_SYMBOL_GPL(soc_codec_dev_wm8727);
+
+
+static __devinit int wm8727_platform_probe(struct platform_device *pdev)
+{
+        wm8727_dai.dev = &pdev->dev;
+        return snd_soc_register_dai(&wm8727_dai);
+}
+
+static int __devexit wm8727_platform_remove(struct platform_device *pdev)
+{
+        snd_soc_unregister_dai(&wm8727_dai);
+        return 0;
+}
+
+struct platform_driver wm8727_codec_driver = {
+        .driver = {
+                        .name = "wm8727-codec",
+                        .owner = THIS_MODULE,
+        },
+
+        .probe = wm8727_platform_probe,
+        .remove = __devexit_p(wm8727_platform_remove),
+};
+
+static int __init wm8727_init(void)
+{
+        return platform_driver_register(&wm8727_codec_driver);
+}
+module_init(wm8727_init);
+
+static void __exit wm8727_exit(void)
+{
+        platform_driver_unregister(&wm8727_codec_driver);
+}
+module_exit(wm8727_exit);
+
+MODULE_DESCRIPTION("ASoC wm8727 driver");
+MODULE_AUTHOR("Neil Jones");
+MODULE_LICENSE("GPL");
diff --git a/sound/soc/codecs/wm8727.h b/sound/soc/codecs/wm8727.h
new file mode 100644
index 000000000000..ee19aa71bcdc
--- /dev/null
+++ b/sound/soc/codecs/wm8727.h
@@ -0,0 +1,21 @@
+/*
+ * wm8727.h
+ *
+ *  Created on: 15-Oct-2009
+ *      Author: neil.jones@imgtec.com
+ *
+ * Copyright (C) 2009 Imagination Technologies Ltd.
+ *
+ *  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.
+ */
+
+#ifndef WM8727_H_
+#define WM8727_H_
+
+extern struct snd_soc_dai wm8727_dai;
+extern struct snd_soc_codec_device soc_codec_dev_wm8727;
+
+#endif /* WM8727_H_ */