![Julia Lawall](/assets/img/avatar_default.png)
Check for snd_pcm_ops structures that are only stored in the ops field of a snd_soc_platform_driver structure or passed as the third argument to snd_pcm_set_ops. The corresponding field or parameter is declared const, so snd_pcm_ops structures that have this property can be declared as const also. The semantic patch that makes this change is as follows: (http://coccinelle.lip6.fr/) // <smpl> @r disable optional_qualifier@ identifier i; position p; @@ static struct snd_pcm_ops i@p = { ... }; @ok1@ identifier r.i; struct snd_soc_platform_driver e; position p; @@ e.ops = &i@p; @ok2@ identifier r.i; expression e1, e2; position p; @@ snd_pcm_set_ops(e1, e2, &i@p) @bad@ position p != {r.p,ok1.p,ok2.p}; identifier r.i; struct snd_pcm_ops e; @@ e@i@p @depends on !bad disable optional_qualifier@ identifier r.i; @@ static +const struct snd_pcm_ops i = { ... }; // </smpl> Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr> Reviewed-by: Takashi Sakamoto <o-takashi@sakamocchi.jp> Acked-by: Clemens Ladisch <clemens@ladisch.de> Signed-off-by: Takashi Iwai <tiwai@suse.de>
379 lines
9.5 KiB
C
379 lines
9.5 KiB
C
/*
|
|
* dice_pcm.c - a part of driver for DICE based devices
|
|
*
|
|
* Copyright (c) Clemens Ladisch <clemens@ladisch.de>
|
|
* Copyright (c) 2014 Takashi Sakamoto <o-takashi@sakamocchi.jp>
|
|
*
|
|
* Licensed under the terms of the GNU General Public License, version 2.
|
|
*/
|
|
|
|
#include "dice.h"
|
|
|
|
static int limit_channels_and_rates(struct snd_dice *dice,
|
|
struct snd_pcm_runtime *runtime,
|
|
enum amdtp_stream_direction dir,
|
|
unsigned int index, unsigned int size)
|
|
{
|
|
struct snd_pcm_hardware *hw = &runtime->hw;
|
|
struct amdtp_stream *stream;
|
|
unsigned int rate;
|
|
__be32 reg;
|
|
int err;
|
|
|
|
/*
|
|
* Retrieve current Multi Bit Linear Audio data channel and limit to
|
|
* it.
|
|
*/
|
|
if (dir == AMDTP_IN_STREAM) {
|
|
stream = &dice->tx_stream[index];
|
|
err = snd_dice_transaction_read_tx(dice,
|
|
size * index + TX_NUMBER_AUDIO,
|
|
®, sizeof(reg));
|
|
} else {
|
|
stream = &dice->rx_stream[index];
|
|
err = snd_dice_transaction_read_rx(dice,
|
|
size * index + RX_NUMBER_AUDIO,
|
|
®, sizeof(reg));
|
|
}
|
|
if (err < 0)
|
|
return err;
|
|
|
|
hw->channels_min = hw->channels_max = be32_to_cpu(reg);
|
|
|
|
/* Retrieve current sampling transfer frequency and limit to it. */
|
|
err = snd_dice_transaction_get_rate(dice, &rate);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
hw->rates = snd_pcm_rate_to_rate_bit(rate);
|
|
snd_pcm_limit_hw_rates(runtime);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void limit_period_and_buffer(struct snd_pcm_hardware *hw)
|
|
{
|
|
hw->periods_min = 2; /* SNDRV_PCM_INFO_BATCH */
|
|
hw->periods_max = UINT_MAX;
|
|
|
|
hw->period_bytes_min = 4 * hw->channels_max; /* byte for a frame */
|
|
|
|
/* Just to prevent from allocating much pages. */
|
|
hw->period_bytes_max = hw->period_bytes_min * 2048;
|
|
hw->buffer_bytes_max = hw->period_bytes_max * hw->periods_min;
|
|
}
|
|
|
|
static int init_hw_info(struct snd_dice *dice,
|
|
struct snd_pcm_substream *substream)
|
|
{
|
|
struct snd_pcm_runtime *runtime = substream->runtime;
|
|
struct snd_pcm_hardware *hw = &runtime->hw;
|
|
enum amdtp_stream_direction dir;
|
|
struct amdtp_stream *stream;
|
|
__be32 reg[2];
|
|
unsigned int count, size;
|
|
int err;
|
|
|
|
hw->info = SNDRV_PCM_INFO_MMAP |
|
|
SNDRV_PCM_INFO_MMAP_VALID |
|
|
SNDRV_PCM_INFO_BATCH |
|
|
SNDRV_PCM_INFO_INTERLEAVED |
|
|
SNDRV_PCM_INFO_JOINT_DUPLEX |
|
|
SNDRV_PCM_INFO_BLOCK_TRANSFER;
|
|
|
|
if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) {
|
|
hw->formats = AM824_IN_PCM_FORMAT_BITS;
|
|
dir = AMDTP_IN_STREAM;
|
|
stream = &dice->tx_stream[substream->pcm->device];
|
|
err = snd_dice_transaction_read_tx(dice, TX_NUMBER, reg,
|
|
sizeof(reg));
|
|
} else {
|
|
hw->formats = AM824_OUT_PCM_FORMAT_BITS;
|
|
dir = AMDTP_OUT_STREAM;
|
|
stream = &dice->rx_stream[substream->pcm->device];
|
|
err = snd_dice_transaction_read_rx(dice, RX_NUMBER, reg,
|
|
sizeof(reg));
|
|
}
|
|
|
|
if (err < 0)
|
|
return err;
|
|
|
|
count = min_t(unsigned int, be32_to_cpu(reg[0]), MAX_STREAMS);
|
|
if (substream->pcm->device >= count)
|
|
return -ENXIO;
|
|
|
|
size = be32_to_cpu(reg[1]) * 4;
|
|
err = limit_channels_and_rates(dice, substream->runtime, dir,
|
|
substream->pcm->device, size);
|
|
if (err < 0)
|
|
return err;
|
|
limit_period_and_buffer(hw);
|
|
|
|
return amdtp_am824_add_pcm_hw_constraints(stream, runtime);
|
|
}
|
|
|
|
static int pcm_open(struct snd_pcm_substream *substream)
|
|
{
|
|
struct snd_dice *dice = substream->private_data;
|
|
int err;
|
|
|
|
err = snd_dice_stream_lock_try(dice);
|
|
if (err < 0)
|
|
goto end;
|
|
|
|
err = init_hw_info(dice, substream);
|
|
if (err < 0)
|
|
goto err_locked;
|
|
|
|
snd_pcm_set_sync(substream);
|
|
end:
|
|
return err;
|
|
err_locked:
|
|
snd_dice_stream_lock_release(dice);
|
|
return err;
|
|
}
|
|
|
|
static int pcm_close(struct snd_pcm_substream *substream)
|
|
{
|
|
struct snd_dice *dice = substream->private_data;
|
|
|
|
snd_dice_stream_lock_release(dice);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int capture_hw_params(struct snd_pcm_substream *substream,
|
|
struct snd_pcm_hw_params *hw_params)
|
|
{
|
|
struct snd_dice *dice = substream->private_data;
|
|
struct amdtp_stream *stream = &dice->tx_stream[substream->pcm->device];
|
|
int err;
|
|
|
|
err = snd_pcm_lib_alloc_vmalloc_buffer(substream,
|
|
params_buffer_bytes(hw_params));
|
|
if (err < 0)
|
|
return err;
|
|
|
|
if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN) {
|
|
mutex_lock(&dice->mutex);
|
|
dice->substreams_counter++;
|
|
mutex_unlock(&dice->mutex);
|
|
}
|
|
|
|
amdtp_am824_set_pcm_format(stream, params_format(hw_params));
|
|
|
|
return 0;
|
|
}
|
|
static int playback_hw_params(struct snd_pcm_substream *substream,
|
|
struct snd_pcm_hw_params *hw_params)
|
|
{
|
|
struct snd_dice *dice = substream->private_data;
|
|
struct amdtp_stream *stream = &dice->rx_stream[substream->pcm->device];
|
|
int err;
|
|
|
|
err = snd_pcm_lib_alloc_vmalloc_buffer(substream,
|
|
params_buffer_bytes(hw_params));
|
|
if (err < 0)
|
|
return err;
|
|
|
|
if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN) {
|
|
mutex_lock(&dice->mutex);
|
|
dice->substreams_counter++;
|
|
mutex_unlock(&dice->mutex);
|
|
}
|
|
|
|
amdtp_am824_set_pcm_format(stream, params_format(hw_params));
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int capture_hw_free(struct snd_pcm_substream *substream)
|
|
{
|
|
struct snd_dice *dice = substream->private_data;
|
|
|
|
mutex_lock(&dice->mutex);
|
|
|
|
if (substream->runtime->status->state != SNDRV_PCM_STATE_OPEN)
|
|
dice->substreams_counter--;
|
|
|
|
snd_dice_stream_stop_duplex(dice);
|
|
|
|
mutex_unlock(&dice->mutex);
|
|
|
|
return snd_pcm_lib_free_vmalloc_buffer(substream);
|
|
}
|
|
|
|
static int playback_hw_free(struct snd_pcm_substream *substream)
|
|
{
|
|
struct snd_dice *dice = substream->private_data;
|
|
|
|
mutex_lock(&dice->mutex);
|
|
|
|
if (substream->runtime->status->state != SNDRV_PCM_STATE_OPEN)
|
|
dice->substreams_counter--;
|
|
|
|
snd_dice_stream_stop_duplex(dice);
|
|
|
|
mutex_unlock(&dice->mutex);
|
|
|
|
return snd_pcm_lib_free_vmalloc_buffer(substream);
|
|
}
|
|
|
|
static int capture_prepare(struct snd_pcm_substream *substream)
|
|
{
|
|
struct snd_dice *dice = substream->private_data;
|
|
struct amdtp_stream *stream = &dice->tx_stream[substream->pcm->device];
|
|
int err;
|
|
|
|
mutex_lock(&dice->mutex);
|
|
err = snd_dice_stream_start_duplex(dice, substream->runtime->rate);
|
|
mutex_unlock(&dice->mutex);
|
|
if (err >= 0)
|
|
amdtp_stream_pcm_prepare(stream);
|
|
|
|
return 0;
|
|
}
|
|
static int playback_prepare(struct snd_pcm_substream *substream)
|
|
{
|
|
struct snd_dice *dice = substream->private_data;
|
|
struct amdtp_stream *stream = &dice->rx_stream[substream->pcm->device];
|
|
int err;
|
|
|
|
mutex_lock(&dice->mutex);
|
|
err = snd_dice_stream_start_duplex(dice, substream->runtime->rate);
|
|
mutex_unlock(&dice->mutex);
|
|
if (err >= 0)
|
|
amdtp_stream_pcm_prepare(stream);
|
|
|
|
return err;
|
|
}
|
|
|
|
static int capture_trigger(struct snd_pcm_substream *substream, int cmd)
|
|
{
|
|
struct snd_dice *dice = substream->private_data;
|
|
struct amdtp_stream *stream = &dice->tx_stream[substream->pcm->device];
|
|
|
|
switch (cmd) {
|
|
case SNDRV_PCM_TRIGGER_START:
|
|
amdtp_stream_pcm_trigger(stream, substream);
|
|
break;
|
|
case SNDRV_PCM_TRIGGER_STOP:
|
|
amdtp_stream_pcm_trigger(stream, NULL);
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
static int playback_trigger(struct snd_pcm_substream *substream, int cmd)
|
|
{
|
|
struct snd_dice *dice = substream->private_data;
|
|
struct amdtp_stream *stream = &dice->rx_stream[substream->pcm->device];
|
|
|
|
switch (cmd) {
|
|
case SNDRV_PCM_TRIGGER_START:
|
|
amdtp_stream_pcm_trigger(stream, substream);
|
|
break;
|
|
case SNDRV_PCM_TRIGGER_STOP:
|
|
amdtp_stream_pcm_trigger(stream, NULL);
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static snd_pcm_uframes_t capture_pointer(struct snd_pcm_substream *substream)
|
|
{
|
|
struct snd_dice *dice = substream->private_data;
|
|
struct amdtp_stream *stream = &dice->tx_stream[substream->pcm->device];
|
|
|
|
return amdtp_stream_pcm_pointer(stream);
|
|
}
|
|
static snd_pcm_uframes_t playback_pointer(struct snd_pcm_substream *substream)
|
|
{
|
|
struct snd_dice *dice = substream->private_data;
|
|
struct amdtp_stream *stream = &dice->rx_stream[substream->pcm->device];
|
|
|
|
return amdtp_stream_pcm_pointer(stream);
|
|
}
|
|
|
|
int snd_dice_create_pcm(struct snd_dice *dice)
|
|
{
|
|
static const struct snd_pcm_ops capture_ops = {
|
|
.open = pcm_open,
|
|
.close = pcm_close,
|
|
.ioctl = snd_pcm_lib_ioctl,
|
|
.hw_params = capture_hw_params,
|
|
.hw_free = capture_hw_free,
|
|
.prepare = capture_prepare,
|
|
.trigger = capture_trigger,
|
|
.pointer = capture_pointer,
|
|
.page = snd_pcm_lib_get_vmalloc_page,
|
|
.mmap = snd_pcm_lib_mmap_vmalloc,
|
|
};
|
|
static const struct snd_pcm_ops playback_ops = {
|
|
.open = pcm_open,
|
|
.close = pcm_close,
|
|
.ioctl = snd_pcm_lib_ioctl,
|
|
.hw_params = playback_hw_params,
|
|
.hw_free = playback_hw_free,
|
|
.prepare = playback_prepare,
|
|
.trigger = playback_trigger,
|
|
.pointer = playback_pointer,
|
|
.page = snd_pcm_lib_get_vmalloc_page,
|
|
.mmap = snd_pcm_lib_mmap_vmalloc,
|
|
};
|
|
__be32 reg;
|
|
struct snd_pcm *pcm;
|
|
unsigned int i, max_capture, max_playback, capture, playback;
|
|
int err;
|
|
|
|
/* Check whether PCM substreams are required. */
|
|
if (dice->force_two_pcms) {
|
|
max_capture = max_playback = 2;
|
|
} else {
|
|
max_capture = max_playback = 0;
|
|
err = snd_dice_transaction_read_tx(dice, TX_NUMBER, ®,
|
|
sizeof(reg));
|
|
if (err < 0)
|
|
return err;
|
|
max_capture = min_t(unsigned int, be32_to_cpu(reg), MAX_STREAMS);
|
|
|
|
err = snd_dice_transaction_read_rx(dice, RX_NUMBER, ®,
|
|
sizeof(reg));
|
|
if (err < 0)
|
|
return err;
|
|
max_playback = min_t(unsigned int, be32_to_cpu(reg), MAX_STREAMS);
|
|
}
|
|
|
|
for (i = 0; i < MAX_STREAMS; i++) {
|
|
capture = playback = 0;
|
|
if (i < max_capture)
|
|
capture = 1;
|
|
if (i < max_playback)
|
|
playback = 1;
|
|
if (capture == 0 && playback == 0)
|
|
break;
|
|
|
|
err = snd_pcm_new(dice->card, "DICE", i, playback, capture,
|
|
&pcm);
|
|
if (err < 0)
|
|
return err;
|
|
pcm->private_data = dice;
|
|
strcpy(pcm->name, dice->card->shortname);
|
|
|
|
if (capture > 0)
|
|
snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE,
|
|
&capture_ops);
|
|
|
|
if (playback > 0)
|
|
snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK,
|
|
&playback_ops);
|
|
}
|
|
|
|
return 0;
|
|
}
|