sound/soc/fsl/lpc3xxx-pcm.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 //
   3 // Author: Kevin Wells <kevin.wells@nxp.com>
   4 //
   5 // Copyright (C) 2008 NXP Semiconductors
   6 // Copyright 2023 Timesys Corporation <piotr.wojtaszczyk@timesys.com>
   7
   8 #include <linux/module.h>
   9 #include <linux/init.h>
  10 #include <linux/platform_device.h>
  11 #include <linux/slab.h>
  12 #include <linux/dma-mapping.h>
  13 #include <linux/amba/pl08x.h>
  14
  15 #include <sound/core.h>
  16 #include <sound/pcm.h>
  17 #include <sound/pcm_params.h>
  18 #include <sound/dmaengine_pcm.h>
  19 #include <sound/soc.h>
  20
  21 #include "lpc3xxx-i2s.h"
  22
  23 #define STUB_FORMATS    (SNDRV_PCM_FMTBIT_S8 | \
  24                         SNDRV_PCM_FMTBIT_U8 | \
  25                         SNDRV_PCM_FMTBIT_S16_LE | \
  26                         SNDRV_PCM_FMTBIT_U16_LE | \
  27                         SNDRV_PCM_FMTBIT_S24_LE | \
  28                         SNDRV_PCM_FMTBIT_U24_LE | \
  29                         SNDRV_PCM_FMTBIT_S32_LE | \
  30                         SNDRV_PCM_FMTBIT_U32_LE | \
  31                         SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE)
  32
  33 static const struct snd_pcm_hardware lpc3xxx_pcm_hardware = {
  34         .info = (SNDRV_PCM_INFO_MMAP |
  35                  SNDRV_PCM_INFO_MMAP_VALID |
  36                  SNDRV_PCM_INFO_INTERLEAVED |
  37                  SNDRV_PCM_INFO_BLOCK_TRANSFER |
  38                  SNDRV_PCM_INFO_PAUSE |
  39                  SNDRV_PCM_INFO_RESUME),
  40         .formats = STUB_FORMATS,
  41         .period_bytes_min = 128,
  42         .period_bytes_max = 2048,
  43         .periods_min = 2,
  44         .periods_max = 1024,
  45         .buffer_bytes_max = 128 * 1024
  46 };
  47
  48 static const struct snd_dmaengine_pcm_config lpc3xxx_dmaengine_pcm_config = {
  49         .pcm_hardware = &lpc3xxx_pcm_hardware,
  50         .prepare_slave_config = snd_dmaengine_pcm_prepare_slave_config,
  51         .compat_filter_fn = pl08x_filter_id,
  52         .prealloc_buffer_size = 128 * 1024,
  53 };
  54
  55 static const struct snd_soc_component_driver lpc3xxx_soc_platform_driver = {
  56         .name = "lpc32xx-pcm",
  57 };
  58
  59 int lpc3xxx_pcm_register(struct platform_device *pdev)
  60 {
  61         int ret;
  62
  63         ret = devm_snd_dmaengine_pcm_register(&pdev->dev, &lpc3xxx_dmaengine_pcm_config, 0);
  64         if (ret) {
  65                 dev_err(&pdev->dev, "failed to register dmaengine: %d\n", ret);
  66                 return ret;
  67         }
  68
  69         return devm_snd_soc_register_component(&pdev->dev, &lpc3xxx_soc_platform_driver,
  70                                                NULL, 0);
  71 }
  72 EXPORT_SYMBOL(lpc3xxx_pcm_register);