2007-02-14 20:20:03 +08:00
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/*
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2010-11-22 14:35:57 +08:00
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* dma.c -- ALSA Soc Audio Layer
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2007-02-14 20:20:03 +08:00
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*
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* (c) 2006 Wolfson Microelectronics PLC.
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* Graeme Gregory graeme.gregory@wolfsonmicro.com or linux@wolfsonmicro.com
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*
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2009-03-01 01:09:57 +08:00
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* Copyright 2004-2005 Simtec Electronics
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2007-02-14 20:20:03 +08:00
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* http://armlinux.simtec.co.uk/
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* Ben Dooks <ben@simtec.co.uk>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*/
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#include <linux/slab.h>
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#include <linux/dma-mapping.h>
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2011-07-16 00:38:28 +08:00
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#include <linux/module.h>
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2007-02-14 20:20:03 +08:00
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#include <sound/soc.h>
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2011-01-11 06:26:06 +08:00
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#include <sound/pcm_params.h>
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2007-02-14 20:20:03 +08:00
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#include <asm/dma.h>
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2008-08-05 23:14:15 +08:00
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#include <mach/hardware.h>
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#include <mach/dma.h>
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2007-02-14 20:20:03 +08:00
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2010-11-22 14:35:57 +08:00
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#include "dma.h"
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2007-02-14 20:20:03 +08:00
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2011-01-07 12:51:26 +08:00
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#define ST_RUNNING (1<<0)
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#define ST_OPENED (1<<1)
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2010-11-22 14:36:50 +08:00
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static const struct snd_pcm_hardware dma_hardware = {
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2007-02-14 20:20:03 +08:00
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.info = SNDRV_PCM_INFO_INTERLEAVED |
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SNDRV_PCM_INFO_BLOCK_TRANSFER |
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SNDRV_PCM_INFO_MMAP |
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2012-09-01 16:38:19 +08:00
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SNDRV_PCM_INFO_MMAP_VALID,
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2007-02-14 20:20:03 +08:00
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.formats = SNDRV_PCM_FMTBIT_S16_LE |
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SNDRV_PCM_FMTBIT_U16_LE |
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SNDRV_PCM_FMTBIT_U8 |
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SNDRV_PCM_FMTBIT_S8,
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.channels_min = 2,
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.channels_max = 2,
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.buffer_bytes_max = 128*1024,
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.period_bytes_min = PAGE_SIZE,
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.period_bytes_max = PAGE_SIZE*2,
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.periods_min = 2,
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.periods_max = 128,
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.fifo_size = 32,
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};
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2010-11-22 14:36:50 +08:00
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struct runtime_data {
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2007-02-14 20:20:03 +08:00
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spinlock_t lock;
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int state;
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unsigned int dma_loaded;
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unsigned int dma_period;
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dma_addr_t dma_start;
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dma_addr_t dma_pos;
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dma_addr_t dma_end;
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2009-11-17 15:53:23 +08:00
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struct s3c_dma_params *params;
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2007-02-14 20:20:03 +08:00
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};
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2011-09-02 08:44:43 +08:00
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static void audio_buffdone(void *data);
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2010-11-22 14:36:50 +08:00
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/* dma_enqueue
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2007-02-14 20:20:03 +08:00
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*
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* place a dma buffer onto the queue for the dma system
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* to handle.
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2011-09-02 08:44:43 +08:00
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*/
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2010-11-22 14:36:50 +08:00
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static void dma_enqueue(struct snd_pcm_substream *substream)
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2007-02-14 20:20:03 +08:00
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{
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2010-11-22 14:36:50 +08:00
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struct runtime_data *prtd = substream->runtime->private_data;
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2007-02-14 20:20:03 +08:00
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dma_addr_t pos = prtd->dma_pos;
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2009-09-22 23:48:56 +08:00
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unsigned int limit;
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2012-06-19 12:27:07 +08:00
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struct samsung_dma_prep dma_info;
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2007-02-14 20:20:03 +08:00
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2009-03-07 02:04:34 +08:00
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pr_debug("Entered %s\n", __func__);
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2007-02-14 20:20:03 +08:00
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2011-09-02 08:44:43 +08:00
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limit = (prtd->dma_end - prtd->dma_start) / prtd->dma_period;
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2009-09-22 23:48:56 +08:00
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2009-11-17 15:53:31 +08:00
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pr_debug("%s: loaded %d, limit %d\n",
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__func__, prtd->dma_loaded, limit);
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2009-09-22 23:48:56 +08:00
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2011-09-02 08:44:43 +08:00
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dma_info.cap = (samsung_dma_has_circular() ? DMA_CYCLIC : DMA_SLAVE);
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dma_info.direction =
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(substream->stream == SNDRV_PCM_STREAM_PLAYBACK
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2011-10-14 13:19:30 +08:00
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? DMA_MEM_TO_DEV : DMA_DEV_TO_MEM);
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2011-09-02 08:44:43 +08:00
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dma_info.fp = audio_buffdone;
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dma_info.fp_param = substream;
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dma_info.period = prtd->dma_period;
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dma_info.len = prtd->dma_period*limit;
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2007-02-14 20:20:03 +08:00
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2011-09-02 08:44:43 +08:00
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while (prtd->dma_loaded < limit) {
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2009-03-07 02:04:34 +08:00
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pr_debug("dma_loaded: %d\n", prtd->dma_loaded);
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2007-02-14 20:20:03 +08:00
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2011-09-02 08:44:43 +08:00
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if ((pos + dma_info.period) > prtd->dma_end) {
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dma_info.period = prtd->dma_end - pos;
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pr_debug("%s: corrected dma len %ld\n",
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__func__, dma_info.period);
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2007-02-14 20:20:03 +08:00
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}
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2011-09-02 08:44:43 +08:00
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dma_info.buf = pos;
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prtd->params->ops->prepare(prtd->params->ch, &dma_info);
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2007-02-14 20:20:03 +08:00
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2011-09-02 08:44:43 +08:00
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prtd->dma_loaded++;
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pos += prtd->dma_period;
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if (pos >= prtd->dma_end)
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pos = prtd->dma_start;
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2007-02-14 20:20:03 +08:00
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}
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prtd->dma_pos = pos;
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}
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2011-09-02 08:44:43 +08:00
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static void audio_buffdone(void *data)
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2007-02-14 20:20:03 +08:00
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{
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2011-09-02 08:44:43 +08:00
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struct snd_pcm_substream *substream = data;
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struct runtime_data *prtd = substream->runtime->private_data;
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2007-02-14 20:20:03 +08:00
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2009-03-07 02:04:34 +08:00
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pr_debug("Entered %s\n", __func__);
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2007-02-14 20:20:03 +08:00
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2011-09-02 08:44:43 +08:00
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if (prtd->state & ST_RUNNING) {
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prtd->dma_pos += prtd->dma_period;
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if (prtd->dma_pos >= prtd->dma_end)
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prtd->dma_pos = prtd->dma_start;
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2008-04-30 23:19:32 +08:00
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2011-09-02 08:44:43 +08:00
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if (substream)
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snd_pcm_period_elapsed(substream);
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2007-02-14 20:20:03 +08:00
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2011-09-02 08:44:43 +08:00
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spin_lock(&prtd->lock);
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if (!samsung_dma_has_circular()) {
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prtd->dma_loaded--;
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dma_enqueue(substream);
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}
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spin_unlock(&prtd->lock);
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2007-02-14 20:20:03 +08:00
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}
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}
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2010-11-22 14:36:50 +08:00
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static int dma_hw_params(struct snd_pcm_substream *substream,
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2007-02-14 20:20:03 +08:00
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struct snd_pcm_hw_params *params)
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{
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struct snd_pcm_runtime *runtime = substream->runtime;
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2010-11-22 14:36:50 +08:00
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struct runtime_data *prtd = runtime->private_data;
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2007-02-14 20:20:03 +08:00
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struct snd_soc_pcm_runtime *rtd = substream->private_data;
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unsigned long totbytes = params_buffer_bytes(params);
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2010-03-22 17:11:15 +08:00
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struct s3c_dma_params *dma =
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2010-03-18 04:15:21 +08:00
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snd_soc_dai_get_dma_data(rtd->cpu_dai, substream);
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2012-06-19 12:27:07 +08:00
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struct samsung_dma_req req;
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struct samsung_dma_config config;
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2010-03-22 17:11:15 +08:00
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2009-03-07 02:04:34 +08:00
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pr_debug("Entered %s\n", __func__);
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2007-02-14 20:20:03 +08:00
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/* return if this is a bufferless transfer e.g.
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* codec <--> BT codec or GSM modem -- lg FIXME */
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if (!dma)
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return 0;
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2007-07-24 18:49:39 +08:00
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/* this may get called several times by oss emulation
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* with different params -HW */
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if (prtd->params == NULL) {
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/* prepare DMA */
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prtd->params = dma;
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2007-02-14 20:20:03 +08:00
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2009-03-07 02:04:34 +08:00
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pr_debug("params %p, client %p, channel %d\n", prtd->params,
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2007-07-24 18:49:39 +08:00
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prtd->params->client, prtd->params->channel);
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2007-02-14 20:20:03 +08:00
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2011-09-02 08:44:43 +08:00
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prtd->params->ops = samsung_dma_get_ops();
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2012-06-19 12:27:07 +08:00
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req.cap = (samsung_dma_has_circular() ?
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2011-09-02 08:44:43 +08:00
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DMA_CYCLIC : DMA_SLAVE);
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2012-06-19 12:27:07 +08:00
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req.client = prtd->params->client;
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config.direction =
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2011-09-02 08:44:43 +08:00
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(substream->stream == SNDRV_PCM_STREAM_PLAYBACK
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2011-10-14 13:19:30 +08:00
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? DMA_MEM_TO_DEV : DMA_DEV_TO_MEM);
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2012-06-19 12:27:07 +08:00
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config.width = prtd->params->dma_size;
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config.fifo = prtd->params->dma_addr;
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2011-09-02 08:44:43 +08:00
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prtd->params->ch = prtd->params->ops->request(
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2012-06-19 12:27:07 +08:00
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prtd->params->channel, &req);
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prtd->params->ops->config(prtd->params->ch, &config);
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2007-02-14 20:20:03 +08:00
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}
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snd_pcm_set_runtime_buffer(substream, &substream->dma_buffer);
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runtime->dma_bytes = totbytes;
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spin_lock_irq(&prtd->lock);
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prtd->dma_loaded = 0;
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prtd->dma_period = params_period_bytes(params);
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prtd->dma_start = runtime->dma_addr;
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prtd->dma_pos = prtd->dma_start;
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prtd->dma_end = prtd->dma_start + totbytes;
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spin_unlock_irq(&prtd->lock);
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return 0;
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}
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2010-11-22 14:36:50 +08:00
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static int dma_hw_free(struct snd_pcm_substream *substream)
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2007-02-14 20:20:03 +08:00
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{
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2010-11-22 14:36:50 +08:00
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struct runtime_data *prtd = substream->runtime->private_data;
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2007-02-14 20:20:03 +08:00
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2009-03-07 02:04:34 +08:00
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pr_debug("Entered %s\n", __func__);
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2007-02-14 20:20:03 +08:00
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snd_pcm_set_runtime_buffer(substream, NULL);
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2007-04-17 18:35:18 +08:00
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if (prtd->params) {
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2011-09-27 06:29:11 +08:00
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prtd->params->ops->flush(prtd->params->ch);
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2011-09-02 08:44:43 +08:00
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prtd->params->ops->release(prtd->params->ch,
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prtd->params->client);
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2007-02-14 20:20:03 +08:00
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prtd->params = NULL;
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}
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return 0;
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}
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2010-11-22 14:36:50 +08:00
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static int dma_prepare(struct snd_pcm_substream *substream)
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2007-02-14 20:20:03 +08:00
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{
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2010-11-22 14:36:50 +08:00
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struct runtime_data *prtd = substream->runtime->private_data;
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2007-02-14 20:20:03 +08:00
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int ret = 0;
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2009-03-07 02:04:34 +08:00
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pr_debug("Entered %s\n", __func__);
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2007-02-14 20:20:03 +08:00
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/* return if this is a bufferless transfer e.g.
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* codec <--> BT codec or GSM modem -- lg FIXME */
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if (!prtd->params)
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2008-04-30 23:19:32 +08:00
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return 0;
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2007-02-14 20:20:03 +08:00
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/* flush the DMA channel */
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2011-09-02 08:44:43 +08:00
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prtd->params->ops->flush(prtd->params->ch);
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2007-02-14 20:20:03 +08:00
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prtd->dma_loaded = 0;
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prtd->dma_pos = prtd->dma_start;
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/* enqueue dma buffers */
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2010-11-22 14:36:50 +08:00
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dma_enqueue(substream);
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2007-02-14 20:20:03 +08:00
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return ret;
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}
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2010-11-22 14:36:50 +08:00
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static int dma_trigger(struct snd_pcm_substream *substream, int cmd)
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2007-02-14 20:20:03 +08:00
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{
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2010-11-22 14:36:50 +08:00
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struct runtime_data *prtd = substream->runtime->private_data;
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2007-02-14 20:20:03 +08:00
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int ret = 0;
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2009-03-07 02:04:34 +08:00
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pr_debug("Entered %s\n", __func__);
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2007-02-14 20:20:03 +08:00
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spin_lock(&prtd->lock);
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switch (cmd) {
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case SNDRV_PCM_TRIGGER_START:
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prtd->state |= ST_RUNNING;
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2011-09-02 08:44:43 +08:00
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prtd->params->ops->trigger(prtd->params->ch);
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2007-02-14 20:20:03 +08:00
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break;
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case SNDRV_PCM_TRIGGER_STOP:
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prtd->state &= ~ST_RUNNING;
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2011-09-02 08:44:43 +08:00
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prtd->params->ops->stop(prtd->params->ch);
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2007-02-14 20:20:03 +08:00
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break;
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default:
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ret = -EINVAL;
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break;
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}
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spin_unlock(&prtd->lock);
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return ret;
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}
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|
2008-04-30 23:19:32 +08:00
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static snd_pcm_uframes_t
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2010-11-22 14:36:50 +08:00
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dma_pointer(struct snd_pcm_substream *substream)
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2007-02-14 20:20:03 +08:00
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{
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struct snd_pcm_runtime *runtime = substream->runtime;
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2010-11-22 14:36:50 +08:00
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struct runtime_data *prtd = runtime->private_data;
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2007-02-14 20:20:03 +08:00
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unsigned long res;
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|
2009-03-07 02:04:34 +08:00
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pr_debug("Entered %s\n", __func__);
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2007-02-14 20:20:03 +08:00
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|
2011-09-02 08:44:43 +08:00
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res = prtd->dma_pos - prtd->dma_start;
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2007-02-14 20:20:03 +08:00
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2011-09-02 08:44:43 +08:00
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pr_debug("Pointer offset: %lu\n", res);
|
2007-02-14 20:20:03 +08:00
|
|
|
|
|
|
|
/* we seem to be getting the odd error from the pcm library due
|
|
|
|
* to out-of-bounds pointers. this is maybe due to the dma engine
|
|
|
|
* not having loaded the new values for the channel before being
|
2011-02-25 14:16:37 +08:00
|
|
|
* called... (todo - fix )
|
2007-02-14 20:20:03 +08:00
|
|
|
*/
|
|
|
|
|
|
|
|
if (res >= snd_pcm_lib_buffer_bytes(substream)) {
|
|
|
|
if (res == snd_pcm_lib_buffer_bytes(substream))
|
|
|
|
res = 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
return bytes_to_frames(substream->runtime, res);
|
|
|
|
}
|
|
|
|
|
2010-11-22 14:36:50 +08:00
|
|
|
static int dma_open(struct snd_pcm_substream *substream)
|
2007-02-14 20:20:03 +08:00
|
|
|
{
|
|
|
|
struct snd_pcm_runtime *runtime = substream->runtime;
|
2010-11-22 14:36:50 +08:00
|
|
|
struct runtime_data *prtd;
|
2007-02-14 20:20:03 +08:00
|
|
|
|
2009-03-07 02:04:34 +08:00
|
|
|
pr_debug("Entered %s\n", __func__);
|
2007-02-14 20:20:03 +08:00
|
|
|
|
2009-08-20 23:02:23 +08:00
|
|
|
snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS);
|
2010-11-22 14:36:50 +08:00
|
|
|
snd_soc_set_runtime_hwparams(substream, &dma_hardware);
|
2007-02-14 20:20:03 +08:00
|
|
|
|
2010-11-22 14:36:50 +08:00
|
|
|
prtd = kzalloc(sizeof(struct runtime_data), GFP_KERNEL);
|
2007-02-14 20:20:03 +08:00
|
|
|
if (prtd == NULL)
|
|
|
|
return -ENOMEM;
|
|
|
|
|
2007-05-22 22:17:05 +08:00
|
|
|
spin_lock_init(&prtd->lock);
|
|
|
|
|
2007-02-14 20:20:03 +08:00
|
|
|
runtime->private_data = prtd;
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2010-11-22 14:36:50 +08:00
|
|
|
static int dma_close(struct snd_pcm_substream *substream)
|
2007-02-14 20:20:03 +08:00
|
|
|
{
|
|
|
|
struct snd_pcm_runtime *runtime = substream->runtime;
|
2010-11-22 14:36:50 +08:00
|
|
|
struct runtime_data *prtd = runtime->private_data;
|
2007-02-14 20:20:03 +08:00
|
|
|
|
2009-03-07 02:04:34 +08:00
|
|
|
pr_debug("Entered %s\n", __func__);
|
2007-02-14 20:20:03 +08:00
|
|
|
|
2008-04-30 23:19:32 +08:00
|
|
|
if (!prtd)
|
2010-11-22 14:36:50 +08:00
|
|
|
pr_debug("dma_close called with prtd == NULL\n");
|
2007-02-14 20:20:03 +08:00
|
|
|
|
2008-04-30 23:19:32 +08:00
|
|
|
kfree(prtd);
|
|
|
|
|
2007-02-14 20:20:03 +08:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2010-11-22 14:36:50 +08:00
|
|
|
static int dma_mmap(struct snd_pcm_substream *substream,
|
2007-02-14 20:20:03 +08:00
|
|
|
struct vm_area_struct *vma)
|
|
|
|
{
|
|
|
|
struct snd_pcm_runtime *runtime = substream->runtime;
|
|
|
|
|
2009-03-07 02:04:34 +08:00
|
|
|
pr_debug("Entered %s\n", __func__);
|
2007-02-14 20:20:03 +08:00
|
|
|
|
|
|
|
return dma_mmap_writecombine(substream->pcm->card->dev, vma,
|
2008-04-30 23:19:32 +08:00
|
|
|
runtime->dma_area,
|
|
|
|
runtime->dma_addr,
|
|
|
|
runtime->dma_bytes);
|
2007-02-14 20:20:03 +08:00
|
|
|
}
|
|
|
|
|
2010-11-22 14:36:50 +08:00
|
|
|
static struct snd_pcm_ops dma_ops = {
|
|
|
|
.open = dma_open,
|
|
|
|
.close = dma_close,
|
2007-02-14 20:20:03 +08:00
|
|
|
.ioctl = snd_pcm_lib_ioctl,
|
2010-11-22 14:36:50 +08:00
|
|
|
.hw_params = dma_hw_params,
|
|
|
|
.hw_free = dma_hw_free,
|
|
|
|
.prepare = dma_prepare,
|
|
|
|
.trigger = dma_trigger,
|
|
|
|
.pointer = dma_pointer,
|
|
|
|
.mmap = dma_mmap,
|
2007-02-14 20:20:03 +08:00
|
|
|
};
|
|
|
|
|
2010-11-22 14:36:50 +08:00
|
|
|
static int preallocate_dma_buffer(struct snd_pcm *pcm, int stream)
|
2007-02-14 20:20:03 +08:00
|
|
|
{
|
|
|
|
struct snd_pcm_substream *substream = pcm->streams[stream].substream;
|
|
|
|
struct snd_dma_buffer *buf = &substream->dma_buffer;
|
2010-11-22 14:36:50 +08:00
|
|
|
size_t size = dma_hardware.buffer_bytes_max;
|
2007-02-14 20:20:03 +08:00
|
|
|
|
2009-03-07 02:04:34 +08:00
|
|
|
pr_debug("Entered %s\n", __func__);
|
2007-02-14 20:20:03 +08:00
|
|
|
|
|
|
|
buf->dev.type = SNDRV_DMA_TYPE_DEV;
|
|
|
|
buf->dev.dev = pcm->card->dev;
|
|
|
|
buf->private_data = NULL;
|
|
|
|
buf->area = dma_alloc_writecombine(pcm->card->dev, size,
|
|
|
|
&buf->addr, GFP_KERNEL);
|
|
|
|
if (!buf->area)
|
|
|
|
return -ENOMEM;
|
|
|
|
buf->bytes = size;
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2010-11-22 14:36:50 +08:00
|
|
|
static void dma_free_dma_buffers(struct snd_pcm *pcm)
|
2007-02-14 20:20:03 +08:00
|
|
|
{
|
|
|
|
struct snd_pcm_substream *substream;
|
|
|
|
struct snd_dma_buffer *buf;
|
|
|
|
int stream;
|
|
|
|
|
2009-03-07 02:04:34 +08:00
|
|
|
pr_debug("Entered %s\n", __func__);
|
2007-02-14 20:20:03 +08:00
|
|
|
|
|
|
|
for (stream = 0; stream < 2; stream++) {
|
|
|
|
substream = pcm->streams[stream].substream;
|
|
|
|
if (!substream)
|
|
|
|
continue;
|
|
|
|
|
|
|
|
buf = &substream->dma_buffer;
|
|
|
|
if (!buf->area)
|
|
|
|
continue;
|
|
|
|
|
|
|
|
dma_free_writecombine(pcm->card->dev, buf->bytes,
|
|
|
|
buf->area, buf->addr);
|
|
|
|
buf->area = NULL;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2010-11-22 14:36:50 +08:00
|
|
|
static u64 dma_mask = DMA_BIT_MASK(32);
|
2007-02-14 20:20:03 +08:00
|
|
|
|
2011-06-07 23:08:33 +08:00
|
|
|
static int dma_new(struct snd_soc_pcm_runtime *rtd)
|
2007-02-14 20:20:03 +08:00
|
|
|
{
|
2011-06-07 23:08:33 +08:00
|
|
|
struct snd_card *card = rtd->card->snd_card;
|
|
|
|
struct snd_pcm *pcm = rtd->pcm;
|
2007-02-14 20:20:03 +08:00
|
|
|
int ret = 0;
|
|
|
|
|
2009-03-07 02:04:34 +08:00
|
|
|
pr_debug("Entered %s\n", __func__);
|
2007-02-14 20:20:03 +08:00
|
|
|
|
|
|
|
if (!card->dev->dma_mask)
|
2010-11-22 14:36:50 +08:00
|
|
|
card->dev->dma_mask = &dma_mask;
|
2007-02-14 20:20:03 +08:00
|
|
|
if (!card->dev->coherent_dma_mask)
|
2012-01-01 09:43:03 +08:00
|
|
|
card->dev->coherent_dma_mask = DMA_BIT_MASK(32);
|
2007-02-14 20:20:03 +08:00
|
|
|
|
2012-01-01 08:58:44 +08:00
|
|
|
if (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream) {
|
2010-11-22 14:36:50 +08:00
|
|
|
ret = preallocate_dma_buffer(pcm,
|
2007-02-14 20:20:03 +08:00
|
|
|
SNDRV_PCM_STREAM_PLAYBACK);
|
|
|
|
if (ret)
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
|
2012-01-01 08:58:44 +08:00
|
|
|
if (pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream) {
|
2010-11-22 14:36:50 +08:00
|
|
|
ret = preallocate_dma_buffer(pcm,
|
2007-02-14 20:20:03 +08:00
|
|
|
SNDRV_PCM_STREAM_CAPTURE);
|
|
|
|
if (ret)
|
|
|
|
goto out;
|
|
|
|
}
|
2010-11-22 14:35:57 +08:00
|
|
|
out:
|
2007-02-14 20:20:03 +08:00
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
2010-11-22 14:36:50 +08:00
|
|
|
static struct snd_soc_platform_driver samsung_asoc_platform = {
|
|
|
|
.ops = &dma_ops,
|
|
|
|
.pcm_new = dma_new,
|
|
|
|
.pcm_free = dma_free_dma_buffers,
|
2007-02-14 20:20:03 +08:00
|
|
|
};
|
|
|
|
|
2012-12-07 22:26:15 +08:00
|
|
|
int asoc_dma_platform_register(struct device *dev)
|
2008-12-04 03:58:17 +08:00
|
|
|
{
|
2012-12-07 16:29:21 +08:00
|
|
|
return snd_soc_register_platform(dev, &samsung_asoc_platform);
|
2008-12-04 03:58:17 +08:00
|
|
|
}
|
2012-12-07 16:29:21 +08:00
|
|
|
EXPORT_SYMBOL_GPL(asoc_dma_platform_register);
|
2008-12-04 03:58:17 +08:00
|
|
|
|
2012-12-07 22:26:15 +08:00
|
|
|
void asoc_dma_platform_unregister(struct device *dev)
|
2008-12-04 03:58:17 +08:00
|
|
|
{
|
2012-12-07 16:29:21 +08:00
|
|
|
snd_soc_unregister_platform(dev);
|
2010-03-18 04:15:21 +08:00
|
|
|
}
|
2012-12-07 16:29:21 +08:00
|
|
|
EXPORT_SYMBOL_GPL(asoc_dma_platform_unregister);
|
2008-12-04 03:58:17 +08:00
|
|
|
|
2007-02-14 20:20:03 +08:00
|
|
|
MODULE_AUTHOR("Ben Dooks, <ben@simtec.co.uk>");
|
2010-11-22 14:36:50 +08:00
|
|
|
MODULE_DESCRIPTION("Samsung ASoC DMA Driver");
|
2007-02-14 20:20:03 +08:00
|
|
|
MODULE_LICENSE("GPL");
|