ASoC: Rename ep93xx soc directory to cirrus

This patch is to rename the directory "ep93xx" in "cirrus".
Name more accurately reflects the manufacturer and allows to add
drivers not only for architecture ep93xx in this directory.
Patch not contain any functional changes.

Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

1 files changed, 242 insertions, 0 deletions

diff --git a/sound/soc/cirrus/ep93xx-pcm.c b/sound/soc/cirrus/ep93xx-pcm.c
new file mode 100644
index 000000000000..4eea98b42bc8
--- /dev/null
+++ b/sound/soc/cirrus/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_no_residue,
+	.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");