Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / sound / soc / tegra / tegra_pcm.c

diff --git a/kernel/sound/soc/tegra/tegra_pcm.c b/kernel/sound/soc/tegra/tegra_pcm.c
new file mode 100644 (file)
index 0000000..93caed5
--- /dev/null
+++ b/kernel/sound/soc/tegra/tegra_pcm.c
@@ -0,0 +1,86 @@
+/*
+ * tegra_pcm.c - Tegra PCM driver
+ *
+ * Author: Stephen Warren <swarren@nvidia.com>
+ * Copyright (C) 2010,2012 - NVIDIA, Inc.
+ *
+ * Based on code copyright/by:
+ *
+ * Copyright (c) 2009-2010, NVIDIA Corporation.
+ * Scott Peterson <speterson@nvidia.com>
+ * Vijay Mali <vmali@nvidia.com>
+ *
+ * Copyright (C) 2010 Google, Inc.
+ * Iliyan Malchev <malchev@google.com>
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+ * 02110-1301 USA
+ *
+ */
+
+#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 "tegra_pcm.h"
+
+static const struct snd_pcm_hardware tegra_pcm_hardware = {
+       .info                   = SNDRV_PCM_INFO_MMAP |
+                                 SNDRV_PCM_INFO_MMAP_VALID |
+                                 SNDRV_PCM_INFO_INTERLEAVED,
+       .period_bytes_min       = 1024,
+       .period_bytes_max       = PAGE_SIZE,
+       .periods_min            = 2,
+       .periods_max            = 8,
+       .buffer_bytes_max       = PAGE_SIZE * 8,
+       .fifo_size              = 4,
+};
+
+static const struct snd_dmaengine_pcm_config tegra_dmaengine_pcm_config = {
+       .pcm_hardware = &tegra_pcm_hardware,
+       .prepare_slave_config = snd_dmaengine_pcm_prepare_slave_config,
+       .prealloc_buffer_size = PAGE_SIZE * 8,
+};
+
+int tegra_pcm_platform_register(struct device *dev)
+{
+       return snd_dmaengine_pcm_register(dev, &tegra_dmaengine_pcm_config, 0);
+}
+EXPORT_SYMBOL_GPL(tegra_pcm_platform_register);
+
+int tegra_pcm_platform_register_with_chan_names(struct device *dev,
+                               struct snd_dmaengine_pcm_config *config,
+                               char *txdmachan, char *rxdmachan)
+{
+       *config = tegra_dmaengine_pcm_config;
+       config->dma_dev = dev->parent;
+       config->chan_names[0] = txdmachan;
+       config->chan_names[1] = rxdmachan;
+
+       return snd_dmaengine_pcm_register(dev, config, 0);
+}
+EXPORT_SYMBOL_GPL(tegra_pcm_platform_register_with_chan_names);
+
+void tegra_pcm_platform_unregister(struct device *dev)
+{
+       return snd_dmaengine_pcm_unregister(dev);
+}
+EXPORT_SYMBOL_GPL(tegra_pcm_platform_unregister);
+
+MODULE_AUTHOR("Stephen Warren <swarren@nvidia.com>");
+MODULE_DESCRIPTION("Tegra PCM ASoC driver");
+MODULE_LICENSE("GPL");