zte's code,first commit
Change-Id: I9a04da59e459a9bc0d67f101f700d9d7dc8d681b
diff --git a/ap/os/linux/linux-3.4.x/sound/soc/soc-utils.c b/ap/os/linux/linux-3.4.x/sound/soc/soc-utils.c
new file mode 100644
index 0000000..6005370
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/sound/soc/soc-utils.c
@@ -0,0 +1,158 @@
+/*
+ * soc-util.c -- ALSA SoC Audio Layer utility functions
+ *
+ * Copyright 2009 Wolfson Microelectronics PLC.
+ *
+ * Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
+ * Liam Girdwood <lrg@slimlogic.co.uk>
+ *
+ *
+ * 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/platform_device.h>
+#include <linux/export.h>
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+
+int snd_soc_calc_frame_size(int sample_size, int channels, int tdm_slots)
+{
+ return sample_size * channels * tdm_slots;
+}
+EXPORT_SYMBOL_GPL(snd_soc_calc_frame_size);
+
+int snd_soc_params_to_frame_size(struct snd_pcm_hw_params *params)
+{
+ int sample_size;
+
+ sample_size = snd_pcm_format_width(params_format(params));
+ if (sample_size < 0)
+ return sample_size;
+
+ return snd_soc_calc_frame_size(sample_size, params_channels(params),
+ 1);
+}
+EXPORT_SYMBOL_GPL(snd_soc_params_to_frame_size);
+
+int snd_soc_calc_bclk(int fs, int sample_size, int channels, int tdm_slots)
+{
+ return fs * snd_soc_calc_frame_size(sample_size, channels, tdm_slots);
+}
+EXPORT_SYMBOL_GPL(snd_soc_calc_bclk);
+
+int snd_soc_params_to_bclk(struct snd_pcm_hw_params *params)
+{
+ int ret;
+
+ ret = snd_soc_params_to_frame_size(params);
+
+ if (ret > 0)
+ return ret * params_rate(params);
+ else
+ return ret;
+}
+EXPORT_SYMBOL_GPL(snd_soc_params_to_bclk);
+
+static const struct snd_pcm_hardware dummy_dma_hardware = {
+ .formats = 0xffffffff,
+ .channels_min = 1,
+ .channels_max = UINT_MAX,
+
+ /* Random values to keep userspace happy when checking constraints */
+ .info = SNDRV_PCM_INFO_INTERLEAVED |
+ SNDRV_PCM_INFO_BLOCK_TRANSFER,
+ .buffer_bytes_max = 128*1024,
+ .period_bytes_min = PAGE_SIZE,
+ .period_bytes_max = PAGE_SIZE*2,
+ .periods_min = 2,
+ .periods_max = 128,
+};
+
+static int dummy_dma_open(struct snd_pcm_substream *substream)
+{
+ snd_soc_set_runtime_hwparams(substream, &dummy_dma_hardware);
+
+ return 0;
+}
+
+static struct snd_pcm_ops dummy_dma_ops = {
+ .open = dummy_dma_open,
+ .ioctl = snd_pcm_lib_ioctl,
+};
+
+static struct snd_soc_platform_driver dummy_platform = {
+ .ops = &dummy_dma_ops,
+};
+
+static struct snd_soc_codec_driver dummy_codec;
+static struct snd_soc_dai_driver dummy_dai = {
+ .name = "snd-soc-dummy-dai",
+};
+
+static __devinit int snd_soc_dummy_probe(struct platform_device *pdev)
+{
+ int ret;
+
+ ret = snd_soc_register_codec(&pdev->dev, &dummy_codec, &dummy_dai, 1);
+ if (ret < 0)
+ return ret;
+
+ ret = snd_soc_register_platform(&pdev->dev, &dummy_platform);
+ if (ret < 0) {
+ snd_soc_unregister_codec(&pdev->dev);
+ return ret;
+ }
+
+ return ret;
+}
+
+static __devexit int snd_soc_dummy_remove(struct platform_device *pdev)
+{
+ snd_soc_unregister_platform(&pdev->dev);
+ snd_soc_unregister_codec(&pdev->dev);
+
+ return 0;
+}
+
+static struct platform_driver soc_dummy_driver = {
+ .driver = {
+ .name = "snd-soc-dummy",
+ .owner = THIS_MODULE,
+ },
+ .probe = snd_soc_dummy_probe,
+ .remove = __devexit_p(snd_soc_dummy_remove),
+};
+
+static struct platform_device *soc_dummy_dev;
+
+int __init snd_soc_util_init(void)
+{
+ int ret;
+
+ soc_dummy_dev = platform_device_alloc("snd-soc-dummy", -1);
+ if (!soc_dummy_dev)
+ return -ENOMEM;
+
+ ret = platform_device_add(soc_dummy_dev);
+ if (ret != 0) {
+ platform_device_put(soc_dummy_dev);
+ return ret;
+ }
+
+ ret = platform_driver_register(&soc_dummy_driver);
+ if (ret != 0)
+ platform_device_unregister(soc_dummy_dev);
+
+ return ret;
+}
+
+void __exit snd_soc_util_exit(void)
+{
+ platform_device_unregister(soc_dummy_dev);
+ platform_driver_unregister(&soc_dummy_driver);
+}