cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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udma-pcm.c (1251B)

      1// SPDX-License-Identifier: GPL-2.0
      2/*
      3 *  Copyright (C) 2020 Texas Instruments Incorporated - https://www.ti.com
      4 *  Author: Peter Ujfalusi <peter.ujfalusi@ti.com>
      5 */
      6
      7#include <linux/module.h>
      8#include <sound/core.h>
      9#include <sound/pcm.h>
     10#include <sound/pcm_params.h>
     11#include <sound/soc.h>
     12#include <sound/dmaengine_pcm.h>
     13
     14#include "udma-pcm.h"
     15
     16static const struct snd_pcm_hardware udma_pcm_hardware = {
     17	.info			= SNDRV_PCM_INFO_MMAP |
     18				  SNDRV_PCM_INFO_MMAP_VALID |
     19				  SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_RESUME |
     20				  SNDRV_PCM_INFO_NO_PERIOD_WAKEUP |
     21				  SNDRV_PCM_INFO_INTERLEAVED,
     22	.buffer_bytes_max	= SIZE_MAX,
     23	.period_bytes_min	= 32,
     24	.period_bytes_max	= SZ_64K,
     25	.periods_min		= 2,
     26	.periods_max		= UINT_MAX,
     27};
     28
     29static const struct snd_dmaengine_pcm_config udma_dmaengine_pcm_config = {
     30	.pcm_hardware = &udma_pcm_hardware,
     31	.prepare_slave_config = snd_dmaengine_pcm_prepare_slave_config,
     32};
     33
     34int udma_pcm_platform_register(struct device *dev)
     35{
     36	return devm_snd_dmaengine_pcm_register(dev, &udma_dmaengine_pcm_config,
     37					       0);
     38}
     39EXPORT_SYMBOL_GPL(udma_pcm_platform_register);
     40
     41MODULE_AUTHOR("Peter Ujfalusi <peter.ujfalusi@ti.com>");
     42MODULE_DESCRIPTION("UDMA PCM ASoC platform driver");
     43MODULE_LICENSE("GPL v2");