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1/*2 * ALSA PCM interface for ST SPEAr Processors3 *4 * sound/soc/spear/spear_pcm.c5 *6 * Copyright (C) 2012 ST Microelectronics7 * Rajeev Kumar<rajeevkumar.linux@gmail.com>8 *9 * This file is licensed under the terms of the GNU General Public10 * License version 2. This program is licensed "as is" without any11 * warranty of any kind, whether express or implied.12 */13 14#include <linux/module.h>15#include <linux/dmaengine.h>16#include <linux/platform_device.h>17#include <sound/dmaengine_pcm.h>18#include <sound/pcm.h>19#include <sound/soc.h>20#include <sound/spear_dma.h>21#include "spear_pcm.h"22 23static const struct snd_pcm_hardware spear_pcm_hardware = {24 .info = (SNDRV_PCM_INFO_INTERLEAVED | SNDRV_PCM_INFO_BLOCK_TRANSFER |25 SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_MMAP_VALID |26 SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_RESUME),27 .buffer_bytes_max = 16 * 1024, /* max buffer size */28 .period_bytes_min = 2 * 1024, /* 1 msec data minimum period size */29 .period_bytes_max = 2 * 1024, /* maximum period size */30 .periods_min = 1, /* min # periods */31 .periods_max = 8, /* max # of periods */32 .fifo_size = 0, /* fifo size in bytes */33};34 35static const struct snd_dmaengine_pcm_config spear_dmaengine_pcm_config = {36 .pcm_hardware = &spear_pcm_hardware,37 .prealloc_buffer_size = 16 * 1024,38};39 40int devm_spear_pcm_platform_register(struct device *dev,41 struct snd_dmaengine_pcm_config *config,42 bool (*filter)(struct dma_chan *chan, void *slave))43{44 *config = spear_dmaengine_pcm_config;45 config->compat_filter_fn = filter;46 47 return devm_snd_dmaengine_pcm_register(dev, config,48 SND_DMAENGINE_PCM_FLAG_NO_DT |49 SND_DMAENGINE_PCM_FLAG_COMPAT);50}51EXPORT_SYMBOL_GPL(devm_spear_pcm_platform_register);52 53MODULE_AUTHOR("Rajeev Kumar <rajeevkumar.linux@gmail.com>");54MODULE_DESCRIPTION("SPEAr PCM DMA module");55MODULE_LICENSE("GPL");56