diff options
Diffstat (limited to 'sound/soc/samsung/dmaengine.c')
| -rw-r--r-- | sound/soc/samsung/dmaengine.c | 83 |
1 files changed, 83 insertions, 0 deletions
diff --git a/sound/soc/samsung/dmaengine.c b/sound/soc/samsung/dmaengine.c new file mode 100644 index 00000000000..750ce5808d9 --- /dev/null +++ b/sound/soc/samsung/dmaengine.c @@ -0,0 +1,83 @@ +/* + * dmaengine.c - Samsung dmaengine wrapper + * + * Author: Mark Brown <broonie@linaro.org> + * Copyright 2013 Linaro + * + * 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. + * + */ + +#include <linux/module.h> +#include <linux/amba/pl08x.h> + +#include <sound/core.h> +#include <sound/pcm.h> +#include <sound/pcm_params.h> +#include <sound/dmaengine_pcm.h> +#include <sound/soc.h> +#include <sound/soc-dai.h> + +#include "dma.h" + +#ifdef CONFIG_ARCH_S3C64XX +#define filter_fn pl08x_filter_id +#else +#define filter_fn NULL +#endif + +static const struct snd_dmaengine_pcm_config samsung_dmaengine_pcm_config = { + .prepare_slave_config = snd_dmaengine_pcm_prepare_slave_config, + .compat_filter_fn = filter_fn, +}; + +void samsung_asoc_init_dma_data(struct snd_soc_dai *dai, + struct s3c_dma_params *playback, + struct s3c_dma_params *capture) +{ + struct snd_dmaengine_dai_dma_data *playback_data = NULL; + struct snd_dmaengine_dai_dma_data *capture_data = NULL; + + if (playback) { + playback_data = &playback->dma_data; + playback_data->filter_data = (void *)playback->channel; + playback_data->chan_name = playback->ch_name; + playback_data->addr = playback->dma_addr; + playback_data->addr_width = playback->dma_size; + } + if (capture) { + capture_data = &capture->dma_data; + capture_data->filter_data = (void *)capture->channel; + capture_data->chan_name = capture->ch_name; + capture_data->addr = capture->dma_addr; + capture_data->addr_width = capture->dma_size; + } + + snd_soc_dai_init_dma_data(dai, playback_data, capture_data); +} +EXPORT_SYMBOL_GPL(samsung_asoc_init_dma_data); + +int samsung_asoc_dma_platform_register(struct device *dev) +{ + return snd_dmaengine_pcm_register(dev, &samsung_dmaengine_pcm_config, + SND_DMAENGINE_PCM_FLAG_CUSTOM_CHANNEL_NAME | + SND_DMAENGINE_PCM_FLAG_COMPAT); +} +EXPORT_SYMBOL_GPL(samsung_asoc_dma_platform_register); + +void samsung_asoc_dma_platform_unregister(struct device *dev) +{ + return snd_dmaengine_pcm_unregister(dev); +} +EXPORT_SYMBOL_GPL(samsung_asoc_dma_platform_unregister); + +MODULE_AUTHOR("Mark Brown <broonie@linaro.org>"); +MODULE_DESCRIPTION("Samsung dmaengine ASoC driver"); +MODULE_LICENSE("GPL"); |