/* * Copyright (C) 2011 Freescale Semiconductor, Inc. All Rights Reserved. * * Based on sound/soc/imx/imx-pcm-dma-mx2.c * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * 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 Street, Fifth Floor, Boston, MA 02110-1301 USA. */ #include #include #include #include #include #include #include #include "mxs-pcm.h" static const struct snd_pcm_hardware snd_mxs_hardware = { .info = SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_MMAP_VALID | SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_RESUME | SNDRV_PCM_INFO_INTERLEAVED | SNDRV_PCM_INFO_HALF_DUPLEX, .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S24_LE, .channels_min = 2, .channels_max = 2, .period_bytes_min = 32, .period_bytes_max = 8192, .periods_min = 1, .periods_max = 52, .buffer_bytes_max = 64 * 1024, .fifo_size = 32, }; static bool filter(struct dma_chan *chan, void *param) { struct mxs_pcm_dma_params *dma_params = param; if (!mxs_dma_is_apbx(chan)) return false; if (chan->chan_id != dma_params->chan_num) return false; chan->private = &dma_params->dma_data; return true; } static const struct snd_dmaengine_pcm_config mxs_dmaengine_pcm_config = { .pcm_hardware = &snd_mxs_hardware, .compat_filter_fn = filter, .prealloc_buffer_size = 64 * 1024, }; int mxs_pcm_platform_register(struct device *dev) { return snd_dmaengine_pcm_register(dev, &mxs_dmaengine_pcm_config, SND_DMAENGINE_PCM_FLAG_NO_RESIDUE | SND_DMAENGINE_PCM_FLAG_NO_DT | SND_DMAENGINE_PCM_FLAG_COMPAT | SND_DMAENGINE_PCM_FLAG_HALF_DUPLEX); } EXPORT_SYMBOL_GPL(mxs_pcm_platform_register); void mxs_pcm_platform_unregister(struct device *dev) { snd_dmaengine_pcm_unregister(dev); } EXPORT_SYMBOL_GPL(mxs_pcm_platform_unregister); MODULE_LICENSE("GPL");