1 files changed, 67 insertions, 0 deletions
diff --git a/sound/soc/cirrus/ep93xx-pcm.c b/sound/soc/cirrus/ep93xx-pcm.c
new file mode 100644
index 000000000..fa72acd8d
--- /dev/null
+++ b/sound/soc/cirrus/ep93xx-pcm.c
@@ -0,0 +1,67 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * 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
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/platform_device.h>
+#include <linux/dmaengine.h>
+
+#include <sound/pcm.h>
+#include <sound/soc.h>
+#include <sound/dmaengine_pcm.h>
+
+#include <linux/platform_data/dma-ep93xx.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),
+	.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 const struct snd_dmaengine_pcm_config ep93xx_dmaengine_pcm_config = {
+	.pcm_hardware = &ep93xx_pcm_hardware,
+	.compat_filter_fn = ep93xx_pcm_dma_filter,
+	.prealloc_buffer_size = 131072,
+};
+
+int devm_ep93xx_pcm_platform_register(struct device *dev)
+{
+	return devm_snd_dmaengine_pcm_register(dev,
+		&ep93xx_dmaengine_pcm_config,
+		SND_DMAENGINE_PCM_FLAG_NO_DT |
+		SND_DMAENGINE_PCM_FLAG_COMPAT);
+}
+EXPORT_SYMBOL_GPL(devm_ep93xx_pcm_platform_register);
+
+MODULE_AUTHOR("Ryan Mallon");
+MODULE_DESCRIPTION("EP93xx ALSA PCM interface");
+MODULE_LICENSE("GPL");