init android origin source code

1 files changed, 242 insertions, 0 deletions

diff --git a/ANDROID_3.4.5/sound/soc/ep93xx/ep93xx-pcm.c b/ANDROID_3.4.5/sound/soc/ep93xx/ep93xx-pcm.c
new file mode 100644
index 00000000..162dbb74
--- /dev/null
+++ b/ANDROID_3.4.5/sound/soc/ep93xx/ep93xx-pcm.c
@@ -0,0 +1,242 @@
+/*
+ * linux/sound/arm/ep93xx-pcm.c - EP93xx ALSA PCM interface
+ *
+ * Copyright (C) 2006 Lennert Buytenhek <buytenh@wantstofly.org>
+ * Copyright (C) 2006 Applied Data Systems
+ *
+ * Rewritten for the SoC audio subsystem (Based on PXA2xx code):
+ *   Copyright (c) 2008 Ryan Mallon
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/device.h>
+#include <linux/slab.h>
+#include <linux/dmaengine.h>
+#include <linux/dma-mapping.h>
+
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+#include <sound/dmaengine_pcm.h>
+
+#include <mach/dma.h>
+#include <mach/hardware.h>
+#include <mach/ep93xx-regs.h>
+
+#include "ep93xx-pcm.h"
+
+static const struct snd_pcm_hardware ep93xx_pcm_hardware = {
+	.info			= (SNDRV_PCM_INFO_MMAP		|
+				   SNDRV_PCM_INFO_MMAP_VALID	|
+				   SNDRV_PCM_INFO_INTERLEAVED	|
+				   SNDRV_PCM_INFO_BLOCK_TRANSFER),
+				   
+	.rates			= SNDRV_PCM_RATE_8000_192000,
+	.rate_min		= SNDRV_PCM_RATE_8000,
+	.rate_max		= SNDRV_PCM_RATE_192000,
+	
+	.formats		= (SNDRV_PCM_FMTBIT_S16_LE |
+				   SNDRV_PCM_FMTBIT_S24_LE |
+				   SNDRV_PCM_FMTBIT_S32_LE),
+	
+	.buffer_bytes_max	= 131072,
+	.period_bytes_min	= 32,
+	.period_bytes_max	= 32768,
+	.periods_min		= 1,
+	.periods_max		= 32,
+	.fifo_size		= 32,
+};
+
+static bool ep93xx_pcm_dma_filter(struct dma_chan *chan, void *filter_param)
+{
+	struct ep93xx_dma_data *data = filter_param;
+
+	if (data->direction == ep93xx_dma_chan_direction(chan)) {
+		chan->private = data;
+		return true;
+	}
+
+	return false;
+}
+
+static int ep93xx_pcm_open(struct snd_pcm_substream *substream)
+{
+	struct snd_soc_pcm_runtime *rtd = substream->private_data;
+	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
+	struct ep93xx_pcm_dma_params *dma_params;
+	struct ep93xx_dma_data *dma_data;
+	int ret;
+
+	snd_soc_set_runtime_hwparams(substream, &ep93xx_pcm_hardware);
+
+	dma_data = kmalloc(sizeof(*dma_data), GFP_KERNEL);
+	if (!dma_data)
+		return -ENOMEM;
+
+	dma_params = snd_soc_dai_get_dma_data(cpu_dai, substream);
+	dma_data->port = dma_params->dma_port;
+	dma_data->name = dma_params->name;
+	dma_data->direction = snd_pcm_substream_to_dma_direction(substream);
+
+	ret = snd_dmaengine_pcm_open(substream, ep93xx_pcm_dma_filter, dma_data);
+	if (ret) {
+		kfree(dma_data);
+		return ret;
+	}
+
+	snd_dmaengine_pcm_set_data(substream, dma_data);
+
+	return 0;
+}
+
+static int ep93xx_pcm_close(struct snd_pcm_substream *substream)
+{
+	struct dma_data *dma_data = snd_dmaengine_pcm_get_data(substream);
+
+	snd_dmaengine_pcm_close(substream);
+	kfree(dma_data);
+	return 0;
+}
+
+static int ep93xx_pcm_hw_params(struct snd_pcm_substream *substream,
+				struct snd_pcm_hw_params *params)
+{
+	snd_pcm_set_runtime_buffer(substream, &substream->dma_buffer);
+
+	return 0;
+}
+
+static int ep93xx_pcm_hw_free(struct snd_pcm_substream *substream)
+{
+	snd_pcm_set_runtime_buffer(substream, NULL);
+	return 0;
+}
+
+static int ep93xx_pcm_mmap(struct snd_pcm_substream *substream,
+			   struct vm_area_struct *vma)
+{
+	struct snd_pcm_runtime *runtime = substream->runtime;
+
+	return dma_mmap_writecombine(substream->pcm->card->dev, vma,
+				     runtime->dma_area,
+				     runtime->dma_addr,
+				     runtime->dma_bytes);
+}
+
+static struct snd_pcm_ops ep93xx_pcm_ops = {
+	.open		= ep93xx_pcm_open,
+	.close		= ep93xx_pcm_close,
+	.ioctl		= snd_pcm_lib_ioctl,
+	.hw_params	= ep93xx_pcm_hw_params,
+	.hw_free	= ep93xx_pcm_hw_free,
+	.trigger	= snd_dmaengine_pcm_trigger,
+	.pointer	= snd_dmaengine_pcm_pointer,
+	.mmap		= ep93xx_pcm_mmap,
+};
+
+static int ep93xx_pcm_preallocate_dma_buffer(struct snd_pcm *pcm, int stream)
+{
+	struct snd_pcm_substream *substream = pcm->streams[stream].substream;
+	struct snd_dma_buffer *buf = &substream->dma_buffer;
+	size_t size = ep93xx_pcm_hardware.buffer_bytes_max;
+
+	buf->dev.type = SNDRV_DMA_TYPE_DEV;
+	buf->dev.dev = pcm->card->dev;
+	buf->private_data = NULL;
+	buf->area = dma_alloc_writecombine(pcm->card->dev, size,
+					   &buf->addr, GFP_KERNEL);
+	buf->bytes = size;
+
+	return (buf->area == NULL) ? -ENOMEM : 0;
+}
+
+static void ep93xx_pcm_free_dma_buffers(struct snd_pcm *pcm)
+{
+	struct snd_pcm_substream *substream;
+	struct snd_dma_buffer *buf;
+	int stream;
+
+	for (stream = 0; stream < 2; stream++) {		
+		substream = pcm->streams[stream].substream;
+		if (!substream)
+			continue;
+		
+		buf = &substream->dma_buffer;
+		if (!buf->area)
+			continue;
+
+		dma_free_writecombine(pcm->card->dev, buf->bytes, buf->area,
+				      buf->addr);
+		buf->area = NULL;
+	}
+}
+
+static u64 ep93xx_pcm_dmamask = DMA_BIT_MASK(32);
+
+static int ep93xx_pcm_new(struct snd_soc_pcm_runtime *rtd)
+{
+	struct snd_card *card = rtd->card->snd_card;
+	struct snd_pcm *pcm = rtd->pcm;
+	int ret = 0;
+
+	if (!card->dev->dma_mask)
+		card->dev->dma_mask = &ep93xx_pcm_dmamask;
+	if (!card->dev->coherent_dma_mask)
+		card->dev->coherent_dma_mask = DMA_BIT_MASK(32);
+
+	if (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream) {
+		ret = ep93xx_pcm_preallocate_dma_buffer(pcm,
+					SNDRV_PCM_STREAM_PLAYBACK);
+		if (ret)
+			return ret;
+	}
+
+	if (pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream) {
+		ret = ep93xx_pcm_preallocate_dma_buffer(pcm,
+					SNDRV_PCM_STREAM_CAPTURE);
+		if (ret)
+			return ret;
+	}
+
+	return 0;
+}
+
+static struct snd_soc_platform_driver ep93xx_soc_platform = {
+	.ops		= &ep93xx_pcm_ops,
+	.pcm_new	= &ep93xx_pcm_new,
+	.pcm_free	= &ep93xx_pcm_free_dma_buffers,
+};
+
+static int __devinit ep93xx_soc_platform_probe(struct platform_device *pdev)
+{
+	return snd_soc_register_platform(&pdev->dev, &ep93xx_soc_platform);
+}
+
+static int __devexit ep93xx_soc_platform_remove(struct platform_device *pdev)
+{
+	snd_soc_unregister_platform(&pdev->dev);
+	return 0;
+}
+
+static struct platform_driver ep93xx_pcm_driver = {
+	.driver = {
+			.name = "ep93xx-pcm-audio",
+			.owner = THIS_MODULE,
+	},
+
+	.probe = ep93xx_soc_platform_probe,
+	.remove = __devexit_p(ep93xx_soc_platform_remove),
+};
+
+module_platform_driver(ep93xx_pcm_driver);
+
+MODULE_AUTHOR("Ryan Mallon");
+MODULE_DESCRIPTION("EP93xx ALSA PCM interface");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:ep93xx-pcm-audio");