cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
Log | Files | Refs | README | LICENSE | sfeed.txt

spear_pcm.c (1823B)

      1/*
      2 * ALSA PCM interface for ST SPEAr Processors
      3 *
      4 * sound/soc/spear/spear_pcm.c
      5 *
      6 * Copyright (C) 2012 ST Microelectronics
      7 * Rajeev Kumar<rajeevkumar.linux@gmail.com>
      8 *
      9 * This file is licensed under the terms of the GNU General Public
     10 * License version 2. This program is licensed "as is" without any
     11 * warranty of any kind, whether express or implied.
     12 */
     13
     14#include <linux/module.h>
     15#include <linux/dmaengine.h>
     16#include <linux/platform_device.h>
     17#include <sound/dmaengine_pcm.h>
     18#include <sound/pcm.h>
     19#include <sound/soc.h>
     20#include <sound/spear_dma.h>
     21#include "spear_pcm.h"
     22
     23static const struct snd_pcm_hardware spear_pcm_hardware = {
     24	.info = (SNDRV_PCM_INFO_INTERLEAVED | SNDRV_PCM_INFO_BLOCK_TRANSFER |
     25		 SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_MMAP_VALID |
     26		 SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_RESUME),
     27	.buffer_bytes_max = 16 * 1024, /* max buffer size */
     28	.period_bytes_min = 2 * 1024, /* 1 msec data minimum period size */
     29	.period_bytes_max = 2 * 1024, /* maximum period size */
     30	.periods_min = 1, /* min # periods */
     31	.periods_max = 8, /* max # of periods */
     32	.fifo_size = 0, /* fifo size in bytes */
     33};
     34
     35static const struct snd_dmaengine_pcm_config spear_dmaengine_pcm_config = {
     36	.pcm_hardware = &spear_pcm_hardware,
     37	.prealloc_buffer_size = 16 * 1024,
     38};
     39
     40int devm_spear_pcm_platform_register(struct device *dev,
     41			struct snd_dmaengine_pcm_config *config,
     42			bool (*filter)(struct dma_chan *chan, void *slave))
     43{
     44	*config = spear_dmaengine_pcm_config;
     45	config->compat_filter_fn = filter;
     46
     47	return devm_snd_dmaengine_pcm_register(dev, config,
     48		SND_DMAENGINE_PCM_FLAG_NO_DT |
     49		SND_DMAENGINE_PCM_FLAG_COMPAT);
     50}
     51EXPORT_SYMBOL_GPL(devm_spear_pcm_platform_register);
     52
     53MODULE_AUTHOR("Rajeev Kumar <rajeevkumar.linux@gmail.com>");
     54MODULE_DESCRIPTION("SPEAr PCM DMA module");
     55MODULE_LICENSE("GPL");