Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / sound / soc / davinci / edma-pcm.c

diff --git a/kernel/sound/soc/davinci/edma-pcm.c b/kernel/sound/soc/davinci/edma-pcm.c
new file mode 100644 (file)
index 0000000..59e588a
--- /dev/null
+++ b/kernel/sound/soc/davinci/edma-pcm.c
@@ -0,0 +1,59 @@
+/*
+ * edma-pcm.c - eDMA PCM driver using dmaengine for AM3xxx, AM4xxx
+ *
+ * Copyright (C) 2014 Texas Instruments, Inc.
+ *
+ * Author: Peter Ujfalusi <peter.ujfalusi@ti.com>
+ *
+ * Based on: sound/soc/tegra/tegra_pcm.c
+ *
+ * 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.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ */
+
+#include <linux/module.h>
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+#include <sound/dmaengine_pcm.h>
+#include <linux/edma.h>
+
+#include "edma-pcm.h"
+
+static const struct snd_pcm_hardware edma_pcm_hardware = {
+       .info                   = SNDRV_PCM_INFO_MMAP |
+                                 SNDRV_PCM_INFO_MMAP_VALID |
+                                 SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_RESUME |
+                                 SNDRV_PCM_INFO_NO_PERIOD_WAKEUP |
+                                 SNDRV_PCM_INFO_INTERLEAVED,
+       .buffer_bytes_max       = 128 * 1024,
+       .period_bytes_min       = 32,
+       .period_bytes_max       = 64 * 1024,
+       .periods_min            = 2,
+       .periods_max            = 19, /* Limit by edma dmaengine driver */
+};
+
+static const struct snd_dmaengine_pcm_config edma_dmaengine_pcm_config = {
+       .pcm_hardware = &edma_pcm_hardware,
+       .prepare_slave_config = snd_dmaengine_pcm_prepare_slave_config,
+       .compat_filter_fn = edma_filter_fn,
+       .prealloc_buffer_size = 128 * 1024,
+};
+
+int edma_pcm_platform_register(struct device *dev)
+{
+       return devm_snd_dmaengine_pcm_register(dev, &edma_dmaengine_pcm_config,
+                                       SND_DMAENGINE_PCM_FLAG_COMPAT);
+}
+EXPORT_SYMBOL_GPL(edma_pcm_platform_register);
+
+MODULE_AUTHOR("Peter Ujfalusi <peter.ujfalusi@ti.com>");
+MODULE_DESCRIPTION("eDMA PCM ASoC platform driver");
+MODULE_LICENSE("GPL");