Initial commit
This commit is contained in:
Ole André Vadla Ravnås
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169c65d57e
51358 changed files with 23120455 additions and 0 deletions
345
sound/soc/blackfin/bf5xx-tdm-pcm.c
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345
sound/soc/blackfin/bf5xx-tdm-pcm.c
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/*
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* File: sound/soc/blackfin/bf5xx-tdm-pcm.c
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* Author: Barry Song <Barry.Song@analog.com>
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*
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* Created: Tue June 06 2009
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* Description: DMA driver for tdm codec
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*
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* Modified:
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* Copyright 2009 Analog Devices Inc.
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*
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* Bugs: Enter bugs at http://blackfin.uclinux.org/
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, see the file COPYING, or write
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* to the Free Software Foundation, Inc.,
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* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/platform_device.h>
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#include <linux/dma-mapping.h>
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#include <linux/gfp.h>
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#include <sound/core.h>
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#include <sound/pcm.h>
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#include <sound/pcm_params.h>
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#include <sound/soc.h>
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#include <asm/dma.h>
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#include "bf5xx-tdm-pcm.h"
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#include "bf5xx-tdm.h"
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#include "bf5xx-sport.h"
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#define PCM_BUFFER_MAX 0x8000
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#define FRAGMENT_SIZE_MIN (4*1024)
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#define FRAGMENTS_MIN 2
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#define FRAGMENTS_MAX 32
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static void bf5xx_dma_irq(void *data)
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{
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struct snd_pcm_substream *pcm = data;
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snd_pcm_period_elapsed(pcm);
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}
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static const struct snd_pcm_hardware bf5xx_pcm_hardware = {
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.info = (SNDRV_PCM_INFO_INTERLEAVED | SNDRV_PCM_INFO_BLOCK_TRANSFER |
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SNDRV_PCM_INFO_RESUME),
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.formats = SNDRV_PCM_FMTBIT_S32_LE,
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.rates = SNDRV_PCM_RATE_48000,
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.channels_min = 2,
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.channels_max = 8,
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.buffer_bytes_max = PCM_BUFFER_MAX,
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.period_bytes_min = FRAGMENT_SIZE_MIN,
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.period_bytes_max = PCM_BUFFER_MAX/2,
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.periods_min = FRAGMENTS_MIN,
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.periods_max = FRAGMENTS_MAX,
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};
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static int bf5xx_pcm_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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size_t size = bf5xx_pcm_hardware.buffer_bytes_max;
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snd_pcm_lib_malloc_pages(substream, size * 4);
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return 0;
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}
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static int bf5xx_pcm_hw_free(struct snd_pcm_substream *substream)
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{
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snd_pcm_lib_free_pages(substream);
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return 0;
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}
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static int bf5xx_pcm_prepare(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 sport_device *sport = runtime->private_data;
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int fragsize_bytes = frames_to_bytes(runtime, runtime->period_size);
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fragsize_bytes /= runtime->channels;
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/* inflate the fragsize to match the dma width of SPORT */
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fragsize_bytes *= 8;
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if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
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sport_set_tx_callback(sport, bf5xx_dma_irq, substream);
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sport_config_tx_dma(sport, runtime->dma_area,
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runtime->periods, fragsize_bytes);
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} else {
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sport_set_rx_callback(sport, bf5xx_dma_irq, substream);
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sport_config_rx_dma(sport, runtime->dma_area,
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runtime->periods, fragsize_bytes);
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}
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return 0;
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}
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static int bf5xx_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
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{
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struct snd_pcm_runtime *runtime = substream->runtime;
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struct sport_device *sport = runtime->private_data;
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int ret = 0;
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switch (cmd) {
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case SNDRV_PCM_TRIGGER_START:
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if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
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sport_tx_start(sport);
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else
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sport_rx_start(sport);
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break;
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case SNDRV_PCM_TRIGGER_STOP:
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case SNDRV_PCM_TRIGGER_SUSPEND:
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case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
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if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
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sport_tx_stop(sport);
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else
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sport_rx_stop(sport);
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break;
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default:
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ret = -EINVAL;
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}
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return ret;
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}
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static snd_pcm_uframes_t bf5xx_pcm_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 sport_device *sport = runtime->private_data;
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unsigned int diff;
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snd_pcm_uframes_t frames;
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if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
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diff = sport_curr_offset_tx(sport);
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frames = diff / (8*4); /* 32 bytes per frame */
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} else {
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diff = sport_curr_offset_rx(sport);
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frames = diff / (8*4);
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}
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return frames;
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}
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static int bf5xx_pcm_open(struct snd_pcm_substream *substream)
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{
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struct snd_soc_pcm_runtime *rtd = substream->private_data;
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struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
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struct sport_device *sport_handle = snd_soc_dai_get_drvdata(cpu_dai);
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struct snd_pcm_runtime *runtime = substream->runtime;
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struct snd_dma_buffer *buf = &substream->dma_buffer;
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int ret = 0;
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snd_soc_set_runtime_hwparams(substream, &bf5xx_pcm_hardware);
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ret = snd_pcm_hw_constraint_integer(runtime,
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SNDRV_PCM_HW_PARAM_PERIODS);
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if (ret < 0)
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goto out;
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if (sport_handle != NULL) {
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if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
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sport_handle->tx_buf = buf->area;
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else
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sport_handle->rx_buf = buf->area;
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runtime->private_data = sport_handle;
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} else {
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pr_err("sport_handle is NULL\n");
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ret = -ENODEV;
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}
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out:
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return ret;
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}
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static int bf5xx_pcm_copy(struct snd_pcm_substream *substream, int channel,
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snd_pcm_uframes_t pos, void *buf, snd_pcm_uframes_t count)
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{
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struct snd_pcm_runtime *runtime = substream->runtime;
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struct sport_device *sport = runtime->private_data;
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struct bf5xx_tdm_port *tdm_port = sport->private_data;
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unsigned int *src;
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unsigned int *dst;
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int i;
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if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
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src = buf;
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dst = (unsigned int *)substream->runtime->dma_area;
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dst += pos * 8;
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while (count--) {
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for (i = 0; i < substream->runtime->channels; i++)
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*(dst + tdm_port->tx_map[i]) = *src++;
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dst += 8;
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}
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} else {
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src = (unsigned int *)substream->runtime->dma_area;
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dst = buf;
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src += pos * 8;
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while (count--) {
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for (i = 0; i < substream->runtime->channels; i++)
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*dst++ = *(src + tdm_port->rx_map[i]);
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src += 8;
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}
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}
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return 0;
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}
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static int bf5xx_pcm_silence(struct snd_pcm_substream *substream,
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int channel, snd_pcm_uframes_t pos, snd_pcm_uframes_t count)
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{
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unsigned char *buf = substream->runtime->dma_area;
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buf += pos * 8 * 4;
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memset(buf, '\0', count * 8 * 4);
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return 0;
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}
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struct snd_pcm_ops bf5xx_pcm_tdm_ops = {
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.open = bf5xx_pcm_open,
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.ioctl = snd_pcm_lib_ioctl,
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.hw_params = bf5xx_pcm_hw_params,
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.hw_free = bf5xx_pcm_hw_free,
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.prepare = bf5xx_pcm_prepare,
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.trigger = bf5xx_pcm_trigger,
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.pointer = bf5xx_pcm_pointer,
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.copy = bf5xx_pcm_copy,
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.silence = bf5xx_pcm_silence,
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};
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static int bf5xx_pcm_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 = bf5xx_pcm_hardware.buffer_bytes_max;
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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_coherent(pcm->card->dev, size * 4,
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&buf->addr, GFP_KERNEL);
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if (!buf->area) {
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pr_err("Failed to allocate dma memory - Please increase uncached DMA memory region\n");
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return -ENOMEM;
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}
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buf->bytes = size;
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return 0;
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}
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static void bf5xx_pcm_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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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_coherent(NULL, buf->bytes, buf->area, 0);
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buf->area = NULL;
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}
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}
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static u64 bf5xx_pcm_dmamask = DMA_BIT_MASK(32);
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static int bf5xx_pcm_tdm_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 = 0;
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if (!card->dev->dma_mask)
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card->dev->dma_mask = &bf5xx_pcm_dmamask;
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if (!card->dev->coherent_dma_mask)
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card->dev->coherent_dma_mask = DMA_BIT_MASK(32);
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if (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream) {
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ret = bf5xx_pcm_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 = bf5xx_pcm_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 bf5xx_tdm_soc_platform = {
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.ops = &bf5xx_pcm_tdm_ops,
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.pcm_new = bf5xx_pcm_tdm_new,
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.pcm_free = bf5xx_pcm_free_dma_buffers,
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};
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static int bf5xx_soc_platform_probe(struct platform_device *pdev)
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{
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return snd_soc_register_platform(&pdev->dev, &bf5xx_tdm_soc_platform);
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}
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static int bf5xx_soc_platform_remove(struct platform_device *pdev)
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{
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snd_soc_unregister_platform(&pdev->dev);
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return 0;
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}
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static struct platform_driver bfin_tdm_driver = {
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.driver = {
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.name = "bfin-tdm-pcm-audio",
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.owner = THIS_MODULE,
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},
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.probe = bf5xx_soc_platform_probe,
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.remove = bf5xx_soc_platform_remove,
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};
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module_platform_driver(bfin_tdm_driver);
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MODULE_AUTHOR("Barry Song");
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MODULE_DESCRIPTION("ADI Blackfin TDM PCM DMA module");
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MODULE_LICENSE("GPL");
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