Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / sound / soc / cirrus / ep93xx-pcm.c

diff --git a/kernel/sound/soc/cirrus/ep93xx-pcm.c b/kernel/sound/soc/cirrus/ep93xx-pcm.c
new file mode 100644 (file)
index 0000000..5f66447
--- /dev/null
+++ b/kernel/sound/soc/cirrus/ep93xx-pcm.c
@@ -0,0 +1,71 @@
+/*
+ * 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/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_RESIDUE |
+               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");