374 строки
9.9 KiB
C
374 строки
9.9 KiB
C
/*
|
|
* File: sound/soc/blackfin/bf5xx-i2s-pcm.c
|
|
* Author: Cliff Cai <Cliff.Cai@analog.com>
|
|
*
|
|
* Created: Tue June 06 2008
|
|
* Description: DMA driver for i2s codec
|
|
*
|
|
* Modified:
|
|
* Copyright 2008 Analog Devices Inc.
|
|
*
|
|
* Bugs: Enter bugs at http://blackfin.uclinux.org/
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, see the file COPYING, or write
|
|
* to the Free Software Foundation, Inc.,
|
|
* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/init.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/dma-mapping.h>
|
|
#include <linux/gfp.h>
|
|
|
|
#include <sound/core.h>
|
|
#include <sound/pcm.h>
|
|
#include <sound/pcm_params.h>
|
|
#include <sound/soc.h>
|
|
|
|
#include <asm/dma.h>
|
|
|
|
#include "bf5xx-sport.h"
|
|
#include "bf5xx-i2s-pcm.h"
|
|
|
|
static void bf5xx_dma_irq(void *data)
|
|
{
|
|
struct snd_pcm_substream *pcm = data;
|
|
snd_pcm_period_elapsed(pcm);
|
|
}
|
|
|
|
static const struct snd_pcm_hardware bf5xx_pcm_hardware = {
|
|
.info = SNDRV_PCM_INFO_INTERLEAVED |
|
|
SNDRV_PCM_INFO_MMAP_VALID |
|
|
SNDRV_PCM_INFO_BLOCK_TRANSFER,
|
|
.period_bytes_min = 32,
|
|
.period_bytes_max = 0x10000,
|
|
.periods_min = 1,
|
|
.periods_max = PAGE_SIZE/32,
|
|
.buffer_bytes_max = 0x20000, /* 128 kbytes */
|
|
.fifo_size = 16,
|
|
};
|
|
|
|
static int bf5xx_pcm_hw_params(struct snd_pcm_substream *substream,
|
|
struct snd_pcm_hw_params *params)
|
|
{
|
|
struct snd_soc_pcm_runtime *rtd = substream->private_data;
|
|
unsigned int buffer_size = params_buffer_bytes(params);
|
|
struct bf5xx_i2s_pcm_data *dma_data;
|
|
|
|
dma_data = snd_soc_dai_get_dma_data(rtd->cpu_dai, substream);
|
|
|
|
if (dma_data->tdm_mode)
|
|
buffer_size = buffer_size / params_channels(params) * 8;
|
|
|
|
return snd_pcm_lib_malloc_pages(substream, buffer_size);
|
|
}
|
|
|
|
static int bf5xx_pcm_hw_free(struct snd_pcm_substream *substream)
|
|
{
|
|
snd_pcm_lib_free_pages(substream);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int bf5xx_pcm_prepare(struct snd_pcm_substream *substream)
|
|
{
|
|
struct snd_soc_pcm_runtime *rtd = substream->private_data;
|
|
struct snd_pcm_runtime *runtime = substream->runtime;
|
|
struct sport_device *sport = runtime->private_data;
|
|
int period_bytes = frames_to_bytes(runtime, runtime->period_size);
|
|
struct bf5xx_i2s_pcm_data *dma_data;
|
|
|
|
dma_data = snd_soc_dai_get_dma_data(rtd->cpu_dai, substream);
|
|
|
|
if (dma_data->tdm_mode)
|
|
period_bytes = period_bytes / runtime->channels * 8;
|
|
|
|
pr_debug("%s enter\n", __func__);
|
|
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
|
|
sport_set_tx_callback(sport, bf5xx_dma_irq, substream);
|
|
sport_config_tx_dma(sport, runtime->dma_area,
|
|
runtime->periods, period_bytes);
|
|
} else {
|
|
sport_set_rx_callback(sport, bf5xx_dma_irq, substream);
|
|
sport_config_rx_dma(sport, runtime->dma_area,
|
|
runtime->periods, period_bytes);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int bf5xx_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
|
|
{
|
|
struct snd_pcm_runtime *runtime = substream->runtime;
|
|
struct sport_device *sport = runtime->private_data;
|
|
int ret = 0;
|
|
|
|
pr_debug("%s enter\n", __func__);
|
|
switch (cmd) {
|
|
case SNDRV_PCM_TRIGGER_START:
|
|
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
|
|
sport_tx_start(sport);
|
|
else
|
|
sport_rx_start(sport);
|
|
break;
|
|
case SNDRV_PCM_TRIGGER_STOP:
|
|
case SNDRV_PCM_TRIGGER_SUSPEND:
|
|
case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
|
|
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
|
|
sport_tx_stop(sport);
|
|
else
|
|
sport_rx_stop(sport);
|
|
break;
|
|
default:
|
|
ret = -EINVAL;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static snd_pcm_uframes_t bf5xx_pcm_pointer(struct snd_pcm_substream *substream)
|
|
{
|
|
struct snd_soc_pcm_runtime *rtd = substream->private_data;
|
|
struct snd_pcm_runtime *runtime = substream->runtime;
|
|
struct sport_device *sport = runtime->private_data;
|
|
unsigned int diff;
|
|
snd_pcm_uframes_t frames;
|
|
struct bf5xx_i2s_pcm_data *dma_data;
|
|
|
|
dma_data = snd_soc_dai_get_dma_data(rtd->cpu_dai, substream);
|
|
|
|
pr_debug("%s enter\n", __func__);
|
|
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
|
|
diff = sport_curr_offset_tx(sport);
|
|
} else {
|
|
diff = sport_curr_offset_rx(sport);
|
|
}
|
|
|
|
/*
|
|
* TX at least can report one frame beyond the end of the
|
|
* buffer if we hit the wraparound case - clamp to within the
|
|
* buffer as the ALSA APIs require.
|
|
*/
|
|
if (diff == snd_pcm_lib_buffer_bytes(substream))
|
|
diff = 0;
|
|
|
|
frames = bytes_to_frames(substream->runtime, diff);
|
|
if (dma_data->tdm_mode)
|
|
frames = frames * runtime->channels / 8;
|
|
|
|
return frames;
|
|
}
|
|
|
|
static int bf5xx_pcm_open(struct snd_pcm_substream *substream)
|
|
{
|
|
struct snd_soc_pcm_runtime *rtd = substream->private_data;
|
|
struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
|
|
struct sport_device *sport_handle = snd_soc_dai_get_drvdata(cpu_dai);
|
|
struct snd_pcm_runtime *runtime = substream->runtime;
|
|
struct snd_dma_buffer *buf = &substream->dma_buffer;
|
|
struct bf5xx_i2s_pcm_data *dma_data;
|
|
int ret;
|
|
|
|
dma_data = snd_soc_dai_get_dma_data(rtd->cpu_dai, substream);
|
|
|
|
pr_debug("%s enter\n", __func__);
|
|
|
|
snd_soc_set_runtime_hwparams(substream, &bf5xx_pcm_hardware);
|
|
if (dma_data->tdm_mode)
|
|
runtime->hw.buffer_bytes_max /= 4;
|
|
else
|
|
runtime->hw.info |= SNDRV_PCM_INFO_MMAP;
|
|
|
|
ret = snd_pcm_hw_constraint_integer(runtime,
|
|
SNDRV_PCM_HW_PARAM_PERIODS);
|
|
if (ret < 0)
|
|
goto out;
|
|
|
|
if (sport_handle != NULL) {
|
|
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
|
|
sport_handle->tx_buf = buf->area;
|
|
else
|
|
sport_handle->rx_buf = buf->area;
|
|
|
|
runtime->private_data = sport_handle;
|
|
} else {
|
|
pr_err("sport_handle is NULL\n");
|
|
return -1;
|
|
}
|
|
return 0;
|
|
|
|
out:
|
|
return ret;
|
|
}
|
|
|
|
static int bf5xx_pcm_mmap(struct snd_pcm_substream *substream,
|
|
struct vm_area_struct *vma)
|
|
{
|
|
struct snd_pcm_runtime *runtime = substream->runtime;
|
|
size_t size = vma->vm_end - vma->vm_start;
|
|
vma->vm_start = (unsigned long)runtime->dma_area;
|
|
vma->vm_end = vma->vm_start + size;
|
|
vma->vm_flags |= VM_SHARED;
|
|
|
|
return 0 ;
|
|
}
|
|
|
|
static int bf5xx_pcm_copy(struct snd_pcm_substream *substream,
|
|
int channel, unsigned long pos,
|
|
void *buf, unsigned long count)
|
|
{
|
|
struct snd_soc_pcm_runtime *rtd = substream->private_data;
|
|
struct snd_pcm_runtime *runtime = substream->runtime;
|
|
unsigned int sample_size = runtime->sample_bits / 8;
|
|
struct bf5xx_i2s_pcm_data *dma_data;
|
|
unsigned int i;
|
|
void *src, *dst;
|
|
|
|
dma_data = snd_soc_dai_get_dma_data(rtd->cpu_dai, substream);
|
|
|
|
if (dma_data->tdm_mode) {
|
|
pos = bytes_to_frames(runtime, pos);
|
|
count = bytes_to_frames(runtime, count);
|
|
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
|
|
src = buf;
|
|
dst = runtime->dma_area;
|
|
dst += pos * sample_size * 8;
|
|
|
|
while (count--) {
|
|
for (i = 0; i < runtime->channels; i++) {
|
|
memcpy(dst + dma_data->map[i] *
|
|
sample_size, src, sample_size);
|
|
src += sample_size;
|
|
}
|
|
dst += 8 * sample_size;
|
|
}
|
|
} else {
|
|
src = runtime->dma_area;
|
|
src += pos * sample_size * 8;
|
|
dst = buf;
|
|
|
|
while (count--) {
|
|
for (i = 0; i < runtime->channels; i++) {
|
|
memcpy(dst, src + dma_data->map[i] *
|
|
sample_size, sample_size);
|
|
dst += sample_size;
|
|
}
|
|
src += 8 * sample_size;
|
|
}
|
|
}
|
|
} else {
|
|
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
|
|
src = buf;
|
|
dst = runtime->dma_area;
|
|
dst += pos;
|
|
} else {
|
|
src = runtime->dma_area;
|
|
src += pos;
|
|
dst = buf;
|
|
}
|
|
|
|
memcpy(dst, src, count);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int bf5xx_pcm_copy_user(struct snd_pcm_substream *substream,
|
|
int channel, unsigned long pos,
|
|
void __user *buf, unsigned long count)
|
|
{
|
|
return bf5xx_pcm_copy(substream, channel, pos, (void *)buf, count);
|
|
}
|
|
|
|
static int bf5xx_pcm_silence(struct snd_pcm_substream *substream,
|
|
int channel, unsigned long pos,
|
|
unsigned long count)
|
|
{
|
|
struct snd_soc_pcm_runtime *rtd = substream->private_data;
|
|
struct snd_pcm_runtime *runtime = substream->runtime;
|
|
unsigned int sample_size = runtime->sample_bits / 8;
|
|
void *buf = runtime->dma_area;
|
|
struct bf5xx_i2s_pcm_data *dma_data;
|
|
unsigned int offset, samples;
|
|
|
|
dma_data = snd_soc_dai_get_dma_data(rtd->cpu_dai, substream);
|
|
|
|
if (dma_data->tdm_mode) {
|
|
offset = bytes_to_frames(runtime, pos) * 8 * sample_size;
|
|
samples = bytes_to_frames(runtime, count) * 8;
|
|
} else {
|
|
offset = pos;
|
|
samples = bytes_to_samples(runtime, count);
|
|
}
|
|
|
|
snd_pcm_format_set_silence(runtime->format, buf + offset, samples);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct snd_pcm_ops bf5xx_pcm_i2s_ops = {
|
|
.open = bf5xx_pcm_open,
|
|
.ioctl = snd_pcm_lib_ioctl,
|
|
.hw_params = bf5xx_pcm_hw_params,
|
|
.hw_free = bf5xx_pcm_hw_free,
|
|
.prepare = bf5xx_pcm_prepare,
|
|
.trigger = bf5xx_pcm_trigger,
|
|
.pointer = bf5xx_pcm_pointer,
|
|
.mmap = bf5xx_pcm_mmap,
|
|
.copy_user = bf5xx_pcm_copy_user,
|
|
.copy_kernel = bf5xx_pcm_copy,
|
|
.fill_silence = bf5xx_pcm_silence,
|
|
};
|
|
|
|
static int bf5xx_pcm_i2s_new(struct snd_soc_pcm_runtime *rtd)
|
|
{
|
|
struct snd_card *card = rtd->card->snd_card;
|
|
size_t size = bf5xx_pcm_hardware.buffer_bytes_max;
|
|
int ret;
|
|
|
|
pr_debug("%s enter\n", __func__);
|
|
ret = dma_coerce_mask_and_coherent(card->dev, DMA_BIT_MASK(32));
|
|
if (ret)
|
|
return ret;
|
|
|
|
return snd_pcm_lib_preallocate_pages_for_all(rtd->pcm,
|
|
SNDRV_DMA_TYPE_DEV, card->dev, size, size);
|
|
}
|
|
|
|
static struct snd_soc_platform_driver bf5xx_i2s_soc_platform = {
|
|
.ops = &bf5xx_pcm_i2s_ops,
|
|
.pcm_new = bf5xx_pcm_i2s_new,
|
|
};
|
|
|
|
static int bfin_i2s_soc_platform_probe(struct platform_device *pdev)
|
|
{
|
|
return devm_snd_soc_register_platform(&pdev->dev,
|
|
&bf5xx_i2s_soc_platform);
|
|
}
|
|
|
|
static struct platform_driver bfin_i2s_pcm_driver = {
|
|
.driver = {
|
|
.name = "bfin-i2s-pcm-audio",
|
|
},
|
|
|
|
.probe = bfin_i2s_soc_platform_probe,
|
|
};
|
|
|
|
module_platform_driver(bfin_i2s_pcm_driver);
|
|
|
|
MODULE_AUTHOR("Cliff Cai");
|
|
MODULE_DESCRIPTION("ADI Blackfin I2S PCM DMA module");
|
|
MODULE_LICENSE("GPL");
|