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Diffstat (limited to '')
-rw-r--r-- | sound/soc/spear/spear_pcm.c | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/sound/soc/spear/spear_pcm.c b/sound/soc/spear/spear_pcm.c new file mode 100644 index 0000000000..e8476da157 --- /dev/null +++ b/sound/soc/spear/spear_pcm.c @@ -0,0 +1,55 @@ +/* + * ALSA PCM interface for ST SPEAr Processors + * + * sound/soc/spear/spear_pcm.c + * + * Copyright (C) 2012 ST Microelectronics + * Rajeev Kumar<rajeevkumar.linux@gmail.com> + * + * This file is licensed under the terms of the GNU General Public + * License version 2. This program is licensed "as is" without any + * warranty of any kind, whether express or implied. + */ + +#include <linux/module.h> +#include <linux/dmaengine.h> +#include <linux/platform_device.h> +#include <sound/dmaengine_pcm.h> +#include <sound/pcm.h> +#include <sound/soc.h> +#include <sound/spear_dma.h> +#include "spear_pcm.h" + +static const struct snd_pcm_hardware spear_pcm_hardware = { + .info = (SNDRV_PCM_INFO_INTERLEAVED | SNDRV_PCM_INFO_BLOCK_TRANSFER | + SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_MMAP_VALID | + SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_RESUME), + .buffer_bytes_max = 16 * 1024, /* max buffer size */ + .period_bytes_min = 2 * 1024, /* 1 msec data minimum period size */ + .period_bytes_max = 2 * 1024, /* maximum period size */ + .periods_min = 1, /* min # periods */ + .periods_max = 8, /* max # of periods */ + .fifo_size = 0, /* fifo size in bytes */ +}; + +static const struct snd_dmaengine_pcm_config spear_dmaengine_pcm_config = { + .pcm_hardware = &spear_pcm_hardware, + .prealloc_buffer_size = 16 * 1024, +}; + +int devm_spear_pcm_platform_register(struct device *dev, + struct snd_dmaengine_pcm_config *config, + bool (*filter)(struct dma_chan *chan, void *slave)) +{ + *config = spear_dmaengine_pcm_config; + config->compat_filter_fn = filter; + + return devm_snd_dmaengine_pcm_register(dev, config, + SND_DMAENGINE_PCM_FLAG_NO_DT | + SND_DMAENGINE_PCM_FLAG_COMPAT); +} +EXPORT_SYMBOL_GPL(devm_spear_pcm_platform_register); + +MODULE_AUTHOR("Rajeev Kumar <rajeevkumar.linux@gmail.com>"); +MODULE_DESCRIPTION("SPEAr PCM DMA module"); +MODULE_LICENSE("GPL"); |