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-rw-r--r--sound/soc/spear/spear_pcm.c55
1 files changed, 55 insertions, 0 deletions
diff --git a/sound/soc/spear/spear_pcm.c b/sound/soc/spear/spear_pcm.c
new file mode 100644
index 0000000000..e8476da157
--- /dev/null
+++ b/sound/soc/spear/spear_pcm.c
@@ -0,0 +1,55 @@
+/*
+ * ALSA PCM interface for ST SPEAr Processors
+ *
+ * sound/soc/spear/spear_pcm.c
+ *
+ * Copyright (C) 2012 ST Microelectronics
+ * Rajeev Kumar<rajeevkumar.linux@gmail.com>
+ *
+ * This file is licensed under the terms of the GNU General Public
+ * License version 2. This program is licensed "as is" without any
+ * warranty of any kind, whether express or implied.
+ */
+
+#include <linux/module.h>
+#include <linux/dmaengine.h>
+#include <linux/platform_device.h>
+#include <sound/dmaengine_pcm.h>
+#include <sound/pcm.h>
+#include <sound/soc.h>
+#include <sound/spear_dma.h>
+#include "spear_pcm.h"
+
+static const struct snd_pcm_hardware spear_pcm_hardware = {
+ .info = (SNDRV_PCM_INFO_INTERLEAVED | SNDRV_PCM_INFO_BLOCK_TRANSFER |
+ SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_MMAP_VALID |
+ SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_RESUME),
+ .buffer_bytes_max = 16 * 1024, /* max buffer size */
+ .period_bytes_min = 2 * 1024, /* 1 msec data minimum period size */
+ .period_bytes_max = 2 * 1024, /* maximum period size */
+ .periods_min = 1, /* min # periods */
+ .periods_max = 8, /* max # of periods */
+ .fifo_size = 0, /* fifo size in bytes */
+};
+
+static const struct snd_dmaengine_pcm_config spear_dmaengine_pcm_config = {
+ .pcm_hardware = &spear_pcm_hardware,
+ .prealloc_buffer_size = 16 * 1024,
+};
+
+int devm_spear_pcm_platform_register(struct device *dev,
+ struct snd_dmaengine_pcm_config *config,
+ bool (*filter)(struct dma_chan *chan, void *slave))
+{
+ *config = spear_dmaengine_pcm_config;
+ config->compat_filter_fn = filter;
+
+ return devm_snd_dmaengine_pcm_register(dev, config,
+ SND_DMAENGINE_PCM_FLAG_NO_DT |
+ SND_DMAENGINE_PCM_FLAG_COMPAT);
+}
+EXPORT_SYMBOL_GPL(devm_spear_pcm_platform_register);
+
+MODULE_AUTHOR("Rajeev Kumar <rajeevkumar.linux@gmail.com>");
+MODULE_DESCRIPTION("SPEAr PCM DMA module");
+MODULE_LICENSE("GPL");