Skip to content

Commit

Permalink
[ALSA] aica - fix behaviour in poor resource conditions
Browse files Browse the repository at this point in the history 
Fix behaviour in poor resource conditions.  With this new patch,
tidied with indent and with SNDRV_PCM_TRIGGER_STOP being used.
Signed-off by: Adrian McMenamin <[email protected]>

Signed-off-by: Takashi Iwai <[email protected]>
Signed-off-by: Jaroslav Kysela <[email protected]>
  • Loading branch information
@tiwai
tiwai authored and Jaroslav Kysela committed Jul 20, 2007
1 parent 43bbb6c commit d20b9b2
Show file tree
Hide file tree
Showing 2 changed files with 37 additions and 46 deletions.
82 changes: 36 additions & 46 deletions sound/sh/aica.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -64,12 +64,6 @@ module_param(enable, bool, 0644);
MODULE_PARM_DESC(enable, "Enable " CARD_NAME " soundcard.");

/* Use workqueue */

static struct spu_work_holder {
struct work_struct spu_dma_work;
void *sspointer;
} spu_working;

static struct workqueue_struct *aica_queue;

/* Simple platform device */
Expand Down Expand Up @@ -100,9 +94,9 @@ static void spu_write_wait(void)
break;
/* To ensure hardware failure doesn't wedge kernel */
time_count++;
if (time_count > 0x10000)
{
snd_printk("WARNING: G2 FIFO appears to be blocked.\n");
if (time_count > 0x10000) {
snd_printk
("WARNING: G2 FIFO appears to be blocked.\n");
break;
}
}
Expand Down Expand Up @@ -226,11 +220,11 @@ static int aica_dma_transfer(int channels, int buffer_size,
runtime = substream->runtime;
for (q = 0; q < channels; q++) {
err = dma_xfer(AICA_DMA_CHANNEL,
(unsigned long)(runtime->dma_area +
(AICA_BUFFER_SIZE * q) /
channels +
AICA_PERIOD_SIZE *
period_offset),
(unsigned long) (runtime->dma_area +
(AICA_BUFFER_SIZE * q) /
channels +
AICA_PERIOD_SIZE *
period_offset),
AICA_CHANNEL0_OFFSET + q * CHANNEL_OFFSET +
AICA_PERIOD_SIZE * period_offset,
buffer_size / channels, AICA_DMA_MODE);
Expand All @@ -244,40 +238,37 @@ static int aica_dma_transfer(int channels, int buffer_size,
static void startup_aica(struct snd_card_aica *dreamcastcard)
{
spu_memload(AICA_CHANNEL0_CONTROL_OFFSET,
dreamcastcard->channel,
sizeof(struct aica_channel));
dreamcastcard->channel, sizeof(struct aica_channel));
aica_chn_start();
}

static void run_spu_dma(struct work_struct *work)
{
int buffer_size;
struct snd_pcm_substream *substream;
struct snd_pcm_runtime *runtime;
struct snd_card_aica *dreamcastcard;
struct spu_work_holder *holder = container_of(work, struct spu_work_holder, spu_dma_work);
substream = holder-> sspointer;
dreamcastcard = substream->pcm->private_data;
runtime = substream->runtime;
dreamcastcard =
container_of(work, struct snd_card_aica, spu_dma_work);
runtime = dreamcastcard->substream->runtime;
if (unlikely(dreamcastcard->dma_check == 0)) {
buffer_size = frames_to_bytes(runtime, runtime->buffer_size);
buffer_size =
frames_to_bytes(runtime, runtime->buffer_size);
if (runtime->channels > 1)
dreamcastcard->channel->flags |= 0x01;
aica_dma_transfer(runtime->channels, buffer_size, substream);
aica_dma_transfer(runtime->channels, buffer_size,
dreamcastcard->substream);
startup_aica(dreamcastcard);
dreamcastcard->clicks =
buffer_size / (AICA_PERIOD_SIZE * runtime->channels);
return;
} else {
aica_dma_transfer(runtime->channels,
AICA_PERIOD_SIZE * runtime->channels,
substream);
dreamcastcard->substream);
snd_pcm_period_elapsed(dreamcastcard->substream);
dreamcastcard->clicks++;
if (unlikely(dreamcastcard->clicks >= AICA_PERIOD_NUMBER))
{
dreamcastcard->clicks %= AICA_PERIOD_NUMBER;
}
mod_timer(&dreamcastcard->timer, jiffies + 1);
}
}
Expand All @@ -289,7 +280,7 @@ static void aica_period_elapsed(unsigned long timer_var)
struct snd_pcm_runtime *runtime;
struct snd_pcm_substream *substream;
struct snd_card_aica *dreamcastcard;
substream = (struct snd_pcm_substream *)timer_var;
substream = (struct snd_pcm_substream *) timer_var;
runtime = substream->runtime;
dreamcastcard = substream->pcm->private_data;
/* Have we played out an additional period? */
Expand All @@ -307,27 +298,24 @@ static void aica_period_elapsed(unsigned long timer_var)
dreamcastcard->current_period = play_period;
if (unlikely(dreamcastcard->dma_check == 0))
dreamcastcard->dma_check = 1;
queue_work(aica_queue, &(spu_working.spu_dma_work));
queue_work(aica_queue, &(dreamcastcard->spu_dma_work));
}

static void spu_begin_dma(struct snd_pcm_substream *substream)
{
/* Must be atomic */
struct snd_card_aica *dreamcastcard;
struct snd_pcm_runtime *runtime;
runtime = substream->runtime;
dreamcastcard = substream->pcm->private_data;
/* Use queue to do the heavy lifting */
spu_working.sspointer = substream;
INIT_WORK(&(spu_working.spu_dma_work), run_spu_dma);
queue_work(aica_queue, &(spu_working.spu_dma_work));
/*get the queue to do the work */
queue_work(aica_queue, &(dreamcastcard->spu_dma_work));
/* Timer may already be running */
if (unlikely(dreamcastcard->timer.data)) {
mod_timer(&dreamcastcard->timer, jiffies + 4);
return;
}
init_timer(&(dreamcastcard->timer));
dreamcastcard->timer.data = (unsigned long)substream;
dreamcastcard->timer.data = (unsigned long) substream;
dreamcastcard->timer.function = aica_period_elapsed;
dreamcastcard->timer.expires = jiffies + 4;
add_timer(&(dreamcastcard->timer));
Expand Down Expand Up @@ -366,7 +354,9 @@ static int snd_aicapcm_pcm_close(struct snd_pcm_substream
*substream)
{
struct snd_card_aica *dreamcastcard = substream->pcm->private_data;
del_timer(&dreamcastcard->timer);
flush_workqueue(aica_queue);
if (dreamcastcard->timer.data)
del_timer(&dreamcastcard->timer);
kfree(dreamcastcard->channel);
spu_disable();
return 0;
Expand All @@ -385,7 +375,8 @@ static int snd_aicapcm_pcm_hw_params(struct snd_pcm_substream
{
/* Allocate a DMA buffer using ALSA built-ins */
return
snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params));
snd_pcm_lib_malloc_pages(substream,
params_buffer_bytes(hw_params));
}

static int snd_aicapcm_pcm_prepare(struct snd_pcm_substream
Expand All @@ -402,15 +393,11 @@ static int snd_aicapcm_pcm_prepare(struct snd_pcm_substream
static int snd_aicapcm_pcm_trigger(struct snd_pcm_substream
*substream, int cmd)
{
struct snd_card_aica *dreamcastcard;
switch (cmd) {
case SNDRV_PCM_TRIGGER_START:
spu_begin_dma(substream);
break;
case SNDRV_PCM_TRIGGER_STOP:
dreamcastcard = substream->pcm->private_data;
if (dreamcastcard->timer.data)
del_timer(&dreamcastcard->timer);
aica_chn_halt();
break;
default:
Expand Down Expand Up @@ -444,7 +431,8 @@ static int __init snd_aicapcmchip(struct snd_card_aica
int err;
/* AICA has no capture ability */
err =
snd_pcm_new(dreamcastcard->card, "AICA PCM", pcm_index, 1, 0, &pcm);
snd_pcm_new(dreamcastcard->card, "AICA PCM", pcm_index, 1, 0,
&pcm);
if (unlikely(err < 0))
return err;
pcm->private_data = dreamcastcard;
Expand Down Expand Up @@ -524,9 +512,7 @@ static int aica_pcmvolume_put(struct snd_kcontrol *kcontrol,
dreamcastcard->channel->vol = ucontrol->value.integer.value[0];
dreamcastcard->master_volume = ucontrol->value.integer.value[0];
spu_memload(AICA_CHANNEL0_CONTROL_OFFSET,
dreamcastcard->channel,
sizeof(struct aica_channel));

dreamcastcard->channel, sizeof(struct aica_channel));
return 1;
}

Expand Down Expand Up @@ -610,6 +596,8 @@ static int __init snd_aica_probe(struct platform_device *devptr)
strcpy(dreamcastcard->card->shortname, SND_AICA_DRIVER);
strcpy(dreamcastcard->card->longname,
"Yamaha AICA Super Intelligent Sound Processor for SEGA Dreamcast");
/* Prepare to use the queue */
INIT_WORK(&(dreamcastcard->spu_dma_work), run_spu_dma);
/* Load the PCM 'chip' */
err = snd_aicapcmchip(dreamcastcard, 0);
if (unlikely(err < 0))
Expand Down Expand Up @@ -663,8 +651,10 @@ static int __init aica_init(void)

static void __exit aica_exit(void)
{
/* Destroy the aica kernel thread */
destroy_workqueue(aica_queue);
/* Destroy the aica kernel thread *
* being extra cautious to check if it exists*/
if (likely(aica_queue))
destroy_workqueue(aica_queue);
platform_device_unregister(pd);
platform_driver_unregister(&snd_aica_driver);
/* Kill any sound still playing and reset ARM7 to safe state */
Expand Down
1 change: 1 addition & 0 deletions sound/sh/aica.h
View file
Original file line number Diff line number Diff line change
Expand Up @@ -69,6 +69,7 @@ struct aica_channel {
};

struct snd_card_aica {
struct work_struct spu_dma_work;
struct snd_card *card;
struct aica_channel *channel;
struct snd_pcm_substream *substream;
Expand Down

0 comments on commit d20b9b2

Please sign in to comment.