| /* |
| * 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, |
| .formats = SNDRV_PCM_FMTBIT_S16_LE, |
| .channels_min = 2, |
| .channels_max = 2, |
| .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"); |