asoc: tegra: tdm: change buffer sizes.

    Change the min-buffer-size according to min-channels.
    Bug 1040171

Change-Id: Ief575c0a180c05521338d0d38fecb8907127b9fe
Reviewed-on: http://git-master/r/165340
(cherry picked from commit 93c738795b834290e71775206a8e94e58e4f223d)

Signed-off-by: Nitin Pai <npai@nvidia.com>
Change-Id: I8d49035c433cbbf0ed7e7a7df61b86fe1657dad3
Reviewed-on: http://git-master/r/166137
Reviewed-by: Automatic_Commit_Validation_User
Reviewed-by: Scott Peterson <speterson@nvidia.com>

1 files changed, 160 insertions, 0 deletions

diff --git a/sound/soc/tegra/tegra_tdm_pcm.c b/sound/soc/tegra/tegra_tdm_pcm.c
new file mode 100644
index 000000000000..8345ba04f943
--- /dev/null
+++ b/sound/soc/tegra/tegra_tdm_pcm.c
@@ -0,0 +1,160 @@
+/*
+ * tegra_tdm_pcm.c - Tegra TDM PCM driver
+ *
+ * Author: Nitin Pai <npai@nvidia.com>
+ * Copyright (c) 2012, NVIDIA CORPORATION.  All rights reserved.
+ *
+ * Based on code copyright/by:
+ *
+ * Copyright (c) 2009-2010, NVIDIA CORPORATION.  All rights reserved.
+ * Scott Peterson <speterson@nvidia.com>
+ * Stephen Warren <swarren@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 <linux/dma-mapping.h>
+#include <linux/slab.h>
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+
+#include "tegra_pcm.h"
+
+#define DRV_NAME "tegra-tdm-pcm-audio"
+
+static const struct snd_pcm_hardware tegra_tdm_pcm_hardware = {
+	.info			= SNDRV_PCM_INFO_MMAP |
+				  SNDRV_PCM_INFO_MMAP_VALID |
+				  SNDRV_PCM_INFO_PAUSE |
+				  SNDRV_PCM_INFO_RESUME |
+				  SNDRV_PCM_INFO_INTERLEAVED,
+	.formats		= SNDRV_PCM_FMTBIT_S16_LE,
+	.channels_min		= 8,
+	.channels_max		= 16,
+	.period_bytes_min	= 8 * 1024,
+	.period_bytes_max	= 16 * 1024,
+	.periods_min		= 4,
+	.periods_max		= 4,
+	.buffer_bytes_max	= 16 * 4 * 1024,
+	.fifo_size		= 4,
+};
+
+static int tegra_tdm_pcm_open(struct snd_pcm_substream *substream)
+{
+	return tegra_pcm_allocate(substream,
+					TEGRA_DMA_MODE_CONTINUOUS_DOUBLE,
+					&tegra_tdm_pcm_hardware);
+
+}
+
+static int tegra_tdm_pcm_close(struct snd_pcm_substream *substream)
+{
+	return tegra_pcm_close(substream);
+}
+
+static int tegra_tdm_pcm_hw_params(struct snd_pcm_substream *substream,
+				struct snd_pcm_hw_params *params)
+{
+	return tegra_pcm_hw_params(substream, params);
+}
+
+static int tegra_tdm_pcm_hw_free(struct snd_pcm_substream *substream)
+{
+	return tegra_pcm_hw_free(substream);
+}
+
+static int tegra_tdm_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
+{
+	return tegra_pcm_trigger(substream, cmd);
+}
+
+static int tegra_tdm_pcm_mmap(struct snd_pcm_substream *substream,
+				struct vm_area_struct *vma)
+{
+	return tegra_pcm_mmap(substream, vma);
+}
+
+static struct snd_pcm_ops tegra_tdm_pcm_ops = {
+	.open		= tegra_tdm_pcm_open,
+	.close		= tegra_tdm_pcm_close,
+	.ioctl		= snd_pcm_lib_ioctl,
+	.hw_params	= tegra_tdm_pcm_hw_params,
+	.hw_free	= tegra_tdm_pcm_hw_free,
+	.trigger	= tegra_tdm_pcm_trigger,
+	.pointer	= tegra_pcm_pointer,
+	.mmap		= tegra_tdm_pcm_mmap,
+};
+
+static int tegra_tdm_pcm_new(struct snd_soc_pcm_runtime *rtd)
+{
+	return tegra_pcm_dma_allocate(rtd ,
+				tegra_tdm_pcm_hardware.buffer_bytes_max);
+}
+
+static void tegra_tdm_pcm_free(struct snd_pcm *pcm)
+{
+	return tegra_pcm_free(pcm);
+}
+
+struct snd_soc_platform_driver tegra_tdm_pcm_platform = {
+	.ops		= &tegra_tdm_pcm_ops,
+	.pcm_new	= tegra_tdm_pcm_new,
+	.pcm_free	= tegra_tdm_pcm_free,
+};
+
+static int __devinit tegra_tdm_pcm_platform_probe(struct platform_device *pdev)
+{
+	return snd_soc_register_platform(&pdev->dev, &tegra_tdm_pcm_platform);
+}
+
+static int __devexit tegra_tdm_pcm_platform_remove(struct platform_device *pdev)
+{
+	snd_soc_unregister_platform(&pdev->dev);
+	return 0;
+}
+
+static struct platform_driver tegra_tdm_pcm_driver = {
+	.driver = {
+		.name = DRV_NAME,
+		.owner = THIS_MODULE,
+	},
+	.probe = tegra_tdm_pcm_platform_probe,
+	.remove = __devexit_p(tegra_tdm_pcm_platform_remove),
+};
+
+static int __init snd_tegra_tdm_pcm_init(void)
+{
+	return platform_driver_register(&tegra_tdm_pcm_driver);
+}
+module_init(snd_tegra_tdm_pcm_init);
+
+static void __exit snd_tegra_tdm_pcm_exit(void)
+{
+	platform_driver_unregister(&tegra_tdm_pcm_driver);
+}
+module_exit(snd_tegra_tdm_pcm_exit);
+
+MODULE_AUTHOR("Nitin Pai <npai@nvidia.com>");
+MODULE_DESCRIPTION("Tegra PCM ASoC driver");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:" DRV_NAME);