1 files changed, 168 insertions, 0 deletions

diff --git a/sound/soc/codecs/wm8727.c b/sound/soc/codecs/wm8727.c
new file mode 100644
index 000000000000..1072621e93fd
--- /dev/null
+++ b/sound/soc/codecs/wm8727.c
@@ -0,0 +1,168 @@
+/*
+ * 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/slab.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 struct snd_soc_codec *wm8727_codec;
+
+static int wm8727_soc_probe(struct platform_device *pdev)
+{
+        struct snd_soc_device *socdev = platform_get_drvdata(pdev);
+        int ret = 0;
+
+        BUG_ON(!wm8727_codec);
+
+        socdev->card->codec = wm8727_codec;
+
+        /* 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;
+        }
+
+        return ret;
+
+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);
+
+        snd_soc_free_pcms(socdev);
+
+        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)
+{
+        struct snd_soc_codec *codec;
+        int ret;
+
+        if (wm8727_codec) {
+                dev_err(&pdev->dev, "Another WM8727 is registered\n");
+                return -EBUSY;
+        }
+
+        codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL);
+        if (codec == NULL)
+                return -ENOMEM;
+        wm8727_codec = codec;
+
+        platform_set_drvdata(pdev, codec);
+
+        mutex_init(&codec->mutex);
+        codec->dev = &pdev->dev;
+        codec->name = "WM8727";
+        codec->owner = THIS_MODULE;
+        codec->dai = &wm8727_dai;
+        codec->num_dai = 1;
+        INIT_LIST_HEAD(&codec->dapm_widgets);
+        INIT_LIST_HEAD(&codec->dapm_paths);
+
+        wm8727_dai.dev = &pdev->dev;
+
+        ret = snd_soc_register_codec(codec);
+        if (ret != 0) {
+                dev_err(&pdev->dev, "Failed to register CODEC: %d\n", ret);
+                goto err;
+        }
+
+        ret = snd_soc_register_dai(&wm8727_dai);
+        if (ret != 0) {
+                dev_err(&pdev->dev, "Failed to register DAI: %d\n", ret);
+                goto err_codec;
+        }
+
+err_codec:
+        snd_soc_unregister_codec(codec);
+err:
+        kfree(codec);
+        return ret;
+}
+
+static int __devexit wm8727_platform_remove(struct platform_device *pdev)
+{
+        snd_soc_unregister_dai(&wm8727_dai);
+        snd_soc_unregister_codec(platform_get_drvdata(pdev));
+        return 0;
+}
+
+static 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");