diff options
Diffstat (limited to 'sound/soc/fsl/imx-pcm-dma.c')
| -rw-r--r-- | sound/soc/fsl/imx-pcm-dma.c | 52 |
1 files changed, 15 insertions, 37 deletions
diff --git a/sound/soc/fsl/imx-pcm-dma.c b/sound/soc/fsl/imx-pcm-dma.c index fde4d2ea68c8..4fa208d6a032 100644 --- a/sound/soc/fsl/imx-pcm-dma.c +++ b/sound/soc/fsl/imx-pcm-dma.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0-or-later /* * imx-pcm-dma-mx2.c -- ALSA Soc Audio Layer * @@ -5,15 +6,11 @@ * * This code is based on code copyrighted by Freescale, * Liam Girdwood, Javier Martin and probably others. - * - * 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. */ #include <linux/platform_device.h> #include <linux/dmaengine.h> #include <linux/types.h> +#include <linux/module.h> #include <sound/core.h> #include <sound/pcm.h> @@ -24,53 +21,34 @@ static bool filter(struct dma_chan *chan, void *param) { - struct snd_dmaengine_dai_dma_data *dma_data = param; - if (!imx_dma_is_general_purpose(chan)) return false; - chan->private = dma_data->filter_data; + chan->private = param; return true; } -static const struct snd_pcm_hardware imx_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, - .formats = SNDRV_PCM_FMTBIT_S16_LE, - .rate_min = 8000, - .channels_min = 2, - .channels_max = 2, - .buffer_bytes_max = IMX_SSI_DMABUF_SIZE, - .period_bytes_min = 128, - .period_bytes_max = 65535, /* Limited by SDMA engine */ - .periods_min = 2, - .periods_max = 255, - .fifo_size = 0, -}; - static const struct snd_dmaengine_pcm_config imx_dmaengine_pcm_config = { - .pcm_hardware = &imx_pcm_hardware, .prepare_slave_config = snd_dmaengine_pcm_prepare_slave_config, .compat_filter_fn = filter, - .prealloc_buffer_size = IMX_SSI_DMABUF_SIZE, }; int imx_pcm_dma_init(struct platform_device *pdev) { - return snd_dmaengine_pcm_register(&pdev->dev, &imx_dmaengine_pcm_config, - SND_DMAENGINE_PCM_FLAG_NO_RESIDUE | - SND_DMAENGINE_PCM_FLAG_NO_DT | + struct snd_dmaengine_pcm_config *config; + + config = devm_kzalloc(&pdev->dev, + sizeof(struct snd_dmaengine_pcm_config), GFP_KERNEL); + if (!config) + return -ENOMEM; + *config = imx_dmaengine_pcm_config; + + return devm_snd_dmaengine_pcm_register(&pdev->dev, + config, SND_DMAENGINE_PCM_FLAG_COMPAT); } EXPORT_SYMBOL_GPL(imx_pcm_dma_init); -void imx_pcm_dma_exit(struct platform_device *pdev) -{ - snd_dmaengine_pcm_unregister(&pdev->dev); -} -EXPORT_SYMBOL_GPL(imx_pcm_dma_exit); +MODULE_DESCRIPTION("Freescale i.MX PCM DMA interface"); +MODULE_LICENSE("GPL"); |