mirror of https://gitee.com/openkylin/linux.git
ASoC: samsung: drop support for legacy S3C24XX DMA API
Signed-off-by: Vasily Khoruzhick <anarsoul@gmail.com> Signed-off-by: Mark Brown <broonie@linaro.org>
This commit is contained in:
Vasily Khoruzhick
Mark Brown
parent
87b132bc03
commit
ae602456e8
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@ -13,9 +13,6 @@ config SND_SOC_SAMSUNG
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config SND_S3C_DMA
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tristate
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config SND_S3C_DMA_LEGACY
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tristate
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config SND_S3C24XX_I2S
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tristate
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@ -1,6 +1,5 @@
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# S3c24XX Platform Support
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snd-soc-s3c-dma-objs := dmaengine.o
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snd-soc-s3c-dma-legacy-objs := dma.o
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snd-soc-idma-objs := idma.o
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snd-soc-s3c24xx-i2s-objs := s3c24xx-i2s.o
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snd-soc-s3c2412-i2s-objs := s3c2412-i2s.o
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@ -11,7 +10,6 @@ snd-soc-pcm-objs := pcm.o
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snd-soc-i2s-objs := i2s.o
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obj-$(CONFIG_SND_S3C_DMA) += snd-soc-s3c-dma.o
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obj-$(CONFIG_SND_S3C_DMA_LEGACY) += snd-soc-s3c-dma-legacy.o
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obj-$(CONFIG_SND_S3C24XX_I2S) += snd-soc-s3c24xx-i2s.o
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obj-$(CONFIG_SND_SAMSUNG_AC97) += snd-soc-ac97.o
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obj-$(CONFIG_SND_S3C2412_SOC_I2S) += snd-soc-s3c2412-i2s.o
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@ -1,454 +0,0 @@
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/*
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* dma.c -- ALSA Soc Audio Layer
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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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* Copyright 2004-2005 Simtec Electronics
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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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#include <linux/module.h>
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#include <sound/soc.h>
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#include <sound/pcm_params.h>
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#include <asm/dma.h>
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#include <mach/hardware.h>
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#include <mach/dma.h>
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#include "dma.h"
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#define ST_RUNNING (1<<0)
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#define ST_OPENED (1<<1)
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static const struct snd_pcm_hardware dma_hardware = {
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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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SNDRV_PCM_INFO_MMAP_VALID,
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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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struct runtime_data {
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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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struct s3c_dma_params *params;
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};
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static void audio_buffdone(void *data);
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/* dma_enqueue
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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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*/
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static void dma_enqueue(struct snd_pcm_substream *substream)
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{
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struct runtime_data *prtd = substream->runtime->private_data;
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dma_addr_t pos = prtd->dma_pos;
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unsigned int limit;
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struct samsung_dma_prep dma_info;
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pr_debug("Entered %s\n", __func__);
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limit = (prtd->dma_end - prtd->dma_start) / prtd->dma_period;
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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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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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? DMA_MEM_TO_DEV : DMA_DEV_TO_MEM);
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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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if (dma_info.cap == DMA_CYCLIC) {
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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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prtd->dma_loaded += limit;
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return;
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}
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while (prtd->dma_loaded < limit) {
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pr_debug("dma_loaded: %d\n", prtd->dma_loaded);
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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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}
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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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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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}
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prtd->dma_pos = pos;
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}
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static void audio_buffdone(void *data)
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{
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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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pr_debug("Entered %s\n", __func__);
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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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if (substream)
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snd_pcm_period_elapsed(substream);
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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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}
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}
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static int dma_hw_params(struct snd_pcm_substream *substream,
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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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struct runtime_data *prtd = runtime->private_data;
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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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struct s3c_dma_params *dma =
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snd_soc_dai_get_dma_data(rtd->cpu_dai, substream);
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struct samsung_dma_req req;
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struct samsung_dma_config config;
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pr_debug("Entered %s\n", __func__);
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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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/* 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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pr_debug("params %p, client %p, channel %d\n", prtd->params,
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prtd->params->client, prtd->params->channel);
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prtd->params->ops = samsung_dma_get_ops();
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req.cap = (samsung_dma_has_circular() ?
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DMA_CYCLIC : DMA_SLAVE);
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req.client = prtd->params->client;
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config.direction =
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(substream->stream == SNDRV_PCM_STREAM_PLAYBACK
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? DMA_MEM_TO_DEV : DMA_DEV_TO_MEM);
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config.width = prtd->params->dma_size;
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config.fifo = prtd->params->dma_addr;
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prtd->params->ch = prtd->params->ops->request(
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prtd->params->channel, &req, rtd->cpu_dai->dev,
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prtd->params->ch_name);
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if (!prtd->params->ch) {
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pr_err("Failed to allocate DMA channel\n");
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return -ENXIO;
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}
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prtd->params->ops->config(prtd->params->ch, &config);
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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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static int dma_hw_free(struct snd_pcm_substream *substream)
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{
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struct runtime_data *prtd = substream->runtime->private_data;
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pr_debug("Entered %s\n", __func__);
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snd_pcm_set_runtime_buffer(substream, NULL);
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if (prtd->params) {
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prtd->params->ops->flush(prtd->params->ch);
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prtd->params->ops->release(prtd->params->ch,
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prtd->params->client);
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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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static int dma_prepare(struct snd_pcm_substream *substream)
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{
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struct runtime_data *prtd = substream->runtime->private_data;
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int ret = 0;
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pr_debug("Entered %s\n", __func__);
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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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return 0;
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/* flush the DMA channel */
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prtd->params->ops->flush(prtd->params->ch);
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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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dma_enqueue(substream);
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return ret;
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}
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static int dma_trigger(struct snd_pcm_substream *substream, int cmd)
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{
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struct runtime_data *prtd = substream->runtime->private_data;
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int ret = 0;
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pr_debug("Entered %s\n", __func__);
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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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prtd->params->ops->trigger(prtd->params->ch);
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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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prtd->params->ops->stop(prtd->params->ch);
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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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static snd_pcm_uframes_t
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dma_pointer(struct snd_pcm_substream *substream)
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{
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struct snd_pcm_runtime *runtime = substream->runtime;
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struct runtime_data *prtd = runtime->private_data;
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unsigned long res;
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pr_debug("Entered %s\n", __func__);
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res = prtd->dma_pos - prtd->dma_start;
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pr_debug("Pointer offset: %lu\n", res);
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/* we seem to be getting the odd error from the pcm library due
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* to out-of-bounds pointers. this is maybe due to the dma engine
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* not having loaded the new values for the channel before being
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* called... (todo - fix )
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*/
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if (res >= snd_pcm_lib_buffer_bytes(substream)) {
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if (res == snd_pcm_lib_buffer_bytes(substream))
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res = 0;
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}
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return bytes_to_frames(substream->runtime, res);
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}
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static int dma_open(struct snd_pcm_substream *substream)
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{
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struct snd_pcm_runtime *runtime = substream->runtime;
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struct runtime_data *prtd;
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pr_debug("Entered %s\n", __func__);
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snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS);
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snd_soc_set_runtime_hwparams(substream, &dma_hardware);
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prtd = kzalloc(sizeof(struct runtime_data), GFP_KERNEL);
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if (prtd == NULL)
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return -ENOMEM;
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spin_lock_init(&prtd->lock);
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runtime->private_data = prtd;
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return 0;
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}
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static int dma_close(struct snd_pcm_substream *substream)
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{
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struct snd_pcm_runtime *runtime = substream->runtime;
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struct runtime_data *prtd = runtime->private_data;
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pr_debug("Entered %s\n", __func__);
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if (!prtd)
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pr_debug("dma_close called with prtd == NULL\n");
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kfree(prtd);
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return 0;
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}
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static int dma_mmap(struct snd_pcm_substream *substream,
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struct vm_area_struct *vma)
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{
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struct snd_pcm_runtime *runtime = substream->runtime;
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pr_debug("Entered %s\n", __func__);
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return dma_mmap_writecombine(substream->pcm->card->dev, vma,
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runtime->dma_area,
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runtime->dma_addr,
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runtime->dma_bytes);
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}
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static struct snd_pcm_ops dma_ops = {
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.open = dma_open,
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.close = dma_close,
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.ioctl = snd_pcm_lib_ioctl,
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.hw_params = dma_hw_params,
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.hw_free = dma_hw_free,
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.prepare = dma_prepare,
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.trigger = dma_trigger,
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.pointer = dma_pointer,
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.mmap = dma_mmap,
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};
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static int preallocate_dma_buffer(struct snd_pcm *pcm, int stream)
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{
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struct snd_pcm_substream *substream = pcm->streams[stream].substream;
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struct snd_dma_buffer *buf = &substream->dma_buffer;
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size_t size = dma_hardware.buffer_bytes_max;
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pr_debug("Entered %s\n", __func__);
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buf->dev.type = SNDRV_DMA_TYPE_DEV;
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buf->dev.dev = pcm->card->dev;
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buf->private_data = NULL;
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buf->area = dma_alloc_writecombine(pcm->card->dev, size,
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&buf->addr, GFP_KERNEL);
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if (!buf->area)
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return -ENOMEM;
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buf->bytes = size;
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return 0;
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}
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static void dma_free_dma_buffers(struct snd_pcm *pcm)
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{
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struct snd_pcm_substream *substream;
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struct snd_dma_buffer *buf;
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int stream;
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pr_debug("Entered %s\n", __func__);
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for (stream = 0; stream < 2; stream++) {
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substream = pcm->streams[stream].substream;
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if (!substream)
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continue;
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buf = &substream->dma_buffer;
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if (!buf->area)
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continue;
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dma_free_writecombine(pcm->card->dev, buf->bytes,
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buf->area, buf->addr);
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buf->area = NULL;
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}
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}
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static int dma_new(struct snd_soc_pcm_runtime *rtd)
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{
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struct snd_card *card = rtd->card->snd_card;
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struct snd_pcm *pcm = rtd->pcm;
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int ret;
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pr_debug("Entered %s\n", __func__);
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ret = dma_coerce_mask_and_coherent(card->dev, DMA_BIT_MASK(32));
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if (ret)
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return ret;
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if (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream) {
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ret = preallocate_dma_buffer(pcm,
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SNDRV_PCM_STREAM_PLAYBACK);
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if (ret)
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goto out;
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}
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if (pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream) {
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ret = preallocate_dma_buffer(pcm,
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SNDRV_PCM_STREAM_CAPTURE);
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if (ret)
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goto out;
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}
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out:
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return ret;
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}
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static struct snd_soc_platform_driver samsung_asoc_platform = {
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.ops = &dma_ops,
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.pcm_new = dma_new,
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.pcm_free = dma_free_dma_buffers,
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};
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void samsung_asoc_init_dma_data(struct snd_soc_dai *dai,
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struct s3c_dma_params *playback,
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struct s3c_dma_params *capture)
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{
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snd_soc_dai_init_dma_data(dai, playback, capture);
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}
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EXPORT_SYMBOL_GPL(samsung_asoc_init_dma_data);
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|
||||
int samsung_asoc_dma_platform_register(struct device *dev)
|
||||
{
|
||||
return devm_snd_soc_register_platform(dev, &samsung_asoc_platform);
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(samsung_asoc_dma_platform_register);
|
||||
|
||||
MODULE_AUTHOR("Ben Dooks, <ben@simtec.co.uk>");
|
||||
MODULE_DESCRIPTION("Samsung ASoC DMA Driver");
|
||||
MODULE_LICENSE("GPL");
|
||||
Loading…
Reference in New Issue