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Diffstat (limited to 'sound/drivers/aloop.c')
-rw-r--r--sound/drivers/aloop.c161
1 files changed, 91 insertions, 70 deletions
diff --git a/sound/drivers/aloop.c b/sound/drivers/aloop.c
index a0da7755fce..2a16c86a60b 100644
--- a/sound/drivers/aloop.c
+++ b/sound/drivers/aloop.c
@@ -34,7 +34,7 @@
#include <linux/slab.h>
#include <linux/time.h>
#include <linux/wait.h>
-#include <linux/moduleparam.h>
+#include <linux/module.h>
#include <linux/platform_device.h>
#include <sound/core.h>
#include <sound/control.h>
@@ -51,7 +51,7 @@ MODULE_SUPPORTED_DEVICE("{{ALSA,Loopback soundcard}}");
static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX; /* Index 0-MAX */
static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR; /* ID for this card */
-static int enable[SNDRV_CARDS] = {1, [1 ... (SNDRV_CARDS - 1)] = 0};
+static bool enable[SNDRV_CARDS] = {1, [1 ... (SNDRV_CARDS - 1)] = 0};
static int pcm_substreams[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 8};
static int pcm_notify[SNDRV_CARDS];
@@ -117,6 +117,7 @@ struct loopback_pcm {
/* timer stuff */
unsigned int irq_pos; /* fractional IRQ position */
unsigned int period_size_frac;
+ unsigned int last_drift;
unsigned long last_jiffies;
struct timer_list timer;
};
@@ -164,6 +165,7 @@ static inline unsigned int get_rate_shift(struct loopback_pcm *dpcm)
return get_setup(dpcm)->rate_shift;
}
+/* call in cable->lock */
static void loopback_timer_start(struct loopback_pcm *dpcm)
{
unsigned long tick;
@@ -183,6 +185,7 @@ static void loopback_timer_start(struct loopback_pcm *dpcm)
add_timer(&dpcm->timer);
}
+/* call in cable->lock */
static inline void loopback_timer_stop(struct loopback_pcm *dpcm)
{
del_timer(&dpcm->timer);
@@ -264,11 +267,12 @@ static int loopback_trigger(struct snd_pcm_substream *substream, int cmd)
return err;
dpcm->last_jiffies = jiffies;
dpcm->pcm_rate_shift = 0;
+ dpcm->last_drift = 0;
spin_lock(&cable->lock);
cable->running |= stream;
cable->pause &= ~stream;
- spin_unlock(&cable->lock);
loopback_timer_start(dpcm);
+ spin_unlock(&cable->lock);
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
loopback_active_notify(dpcm);
break;
@@ -276,23 +280,25 @@ static int loopback_trigger(struct snd_pcm_substream *substream, int cmd)
spin_lock(&cable->lock);
cable->running &= ~stream;
cable->pause &= ~stream;
- spin_unlock(&cable->lock);
loopback_timer_stop(dpcm);
+ spin_unlock(&cable->lock);
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
loopback_active_notify(dpcm);
break;
case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
+ case SNDRV_PCM_TRIGGER_SUSPEND:
spin_lock(&cable->lock);
cable->pause |= stream;
- spin_unlock(&cable->lock);
loopback_timer_stop(dpcm);
+ spin_unlock(&cable->lock);
break;
case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
+ case SNDRV_PCM_TRIGGER_RESUME:
spin_lock(&cable->lock);
dpcm->last_jiffies = jiffies;
cable->pause &= ~stream;
- spin_unlock(&cable->lock);
loopback_timer_start(dpcm);
+ spin_unlock(&cable->lock);
break;
default:
return -EINVAL;
@@ -319,7 +325,7 @@ static void params_change(struct snd_pcm_substream *substream)
struct loopback_pcm *dpcm = runtime->private_data;
struct loopback_cable *cable = dpcm->cable;
- cable->hw.formats = (1ULL << runtime->format);
+ cable->hw.formats = pcm_format_to_bits(runtime->format);
cable->hw.rate_min = runtime->rate;
cable->hw.rate_max = runtime->rate;
cable->hw.channels_min = runtime->channels;
@@ -444,36 +450,33 @@ static void copy_play_buf(struct loopback_pcm *play,
}
}
-#define BYTEPOS_UPDATE_POSONLY 0
-#define BYTEPOS_UPDATE_CLEAR 1
-#define BYTEPOS_UPDATE_COPY 2
-
-static void loopback_bytepos_update(struct loopback_pcm *dpcm,
- unsigned int delta,
- unsigned int cmd)
+static inline unsigned int bytepos_delta(struct loopback_pcm *dpcm,
+ unsigned int jiffies_delta)
{
- unsigned int count;
unsigned long last_pos;
+ unsigned int delta;
last_pos = byte_pos(dpcm, dpcm->irq_pos);
- dpcm->irq_pos += delta * dpcm->pcm_bps;
- count = byte_pos(dpcm, dpcm->irq_pos) - last_pos;
- if (!count)
- return;
- if (cmd == BYTEPOS_UPDATE_CLEAR)
- clear_capture_buf(dpcm, count);
- else if (cmd == BYTEPOS_UPDATE_COPY)
- copy_play_buf(dpcm->cable->streams[SNDRV_PCM_STREAM_PLAYBACK],
- dpcm->cable->streams[SNDRV_PCM_STREAM_CAPTURE],
- count);
- dpcm->buf_pos += count;
- dpcm->buf_pos %= dpcm->pcm_buffer_size;
+ dpcm->irq_pos += jiffies_delta * dpcm->pcm_bps;
+ delta = byte_pos(dpcm, dpcm->irq_pos) - last_pos;
+ if (delta >= dpcm->last_drift)
+ delta -= dpcm->last_drift;
+ dpcm->last_drift = 0;
if (dpcm->irq_pos >= dpcm->period_size_frac) {
dpcm->irq_pos %= dpcm->period_size_frac;
dpcm->period_update_pending = 1;
}
+ return delta;
}
+static inline void bytepos_finish(struct loopback_pcm *dpcm,
+ unsigned int delta)
+{
+ dpcm->buf_pos += delta;
+ dpcm->buf_pos %= dpcm->pcm_buffer_size;
+}
+
+/* call in cable->lock */
static unsigned int loopback_pos_update(struct loopback_cable *cable)
{
struct loopback_pcm *dpcm_play =
@@ -481,10 +484,8 @@ static unsigned int loopback_pos_update(struct loopback_cable *cable)
struct loopback_pcm *dpcm_capt =
cable->streams[SNDRV_PCM_STREAM_CAPTURE];
unsigned long delta_play = 0, delta_capt = 0;
- unsigned int running;
- unsigned long flags;
+ unsigned int running, count1, count2;
- spin_lock_irqsave(&cable->lock, flags);
running = cable->running ^ cable->pause;
if (running & (1 << SNDRV_PCM_STREAM_PLAYBACK)) {
delta_play = jiffies - dpcm_play->last_jiffies;
@@ -500,12 +501,13 @@ static unsigned int loopback_pos_update(struct loopback_cable *cable)
goto unlock;
if (delta_play > delta_capt) {
- loopback_bytepos_update(dpcm_play, delta_play - delta_capt,
- BYTEPOS_UPDATE_POSONLY);
+ count1 = bytepos_delta(dpcm_play, delta_play - delta_capt);
+ bytepos_finish(dpcm_play, count1);
delta_play = delta_capt;
} else if (delta_play < delta_capt) {
- loopback_bytepos_update(dpcm_capt, delta_capt - delta_play,
- BYTEPOS_UPDATE_CLEAR);
+ count1 = bytepos_delta(dpcm_capt, delta_capt - delta_play);
+ clear_capture_buf(dpcm_capt, count1);
+ bytepos_finish(dpcm_capt, count1);
delta_capt = delta_play;
}
@@ -513,41 +515,58 @@ static unsigned int loopback_pos_update(struct loopback_cable *cable)
goto unlock;
/* note delta_capt == delta_play at this moment */
- loopback_bytepos_update(dpcm_capt, delta_capt, BYTEPOS_UPDATE_COPY);
- loopback_bytepos_update(dpcm_play, delta_play, BYTEPOS_UPDATE_POSONLY);
+ count1 = bytepos_delta(dpcm_play, delta_play);
+ count2 = bytepos_delta(dpcm_capt, delta_capt);
+ if (count1 < count2) {
+ dpcm_capt->last_drift = count2 - count1;
+ count1 = count2;
+ } else if (count1 > count2) {
+ dpcm_play->last_drift = count1 - count2;
+ }
+ copy_play_buf(dpcm_play, dpcm_capt, count1);
+ bytepos_finish(dpcm_play, count1);
+ bytepos_finish(dpcm_capt, count1);
unlock:
- spin_unlock_irqrestore(&cable->lock, flags);
return running;
}
static void loopback_timer_function(unsigned long data)
{
struct loopback_pcm *dpcm = (struct loopback_pcm *)data;
- unsigned int running;
+ unsigned long flags;
- running = loopback_pos_update(dpcm->cable);
- if (running & (1 << dpcm->substream->stream)) {
+ spin_lock_irqsave(&dpcm->cable->lock, flags);
+ if (loopback_pos_update(dpcm->cable) & (1 << dpcm->substream->stream)) {
loopback_timer_start(dpcm);
if (dpcm->period_update_pending) {
dpcm->period_update_pending = 0;
+ spin_unlock_irqrestore(&dpcm->cable->lock, flags);
+ /* need to unlock before calling below */
snd_pcm_period_elapsed(dpcm->substream);
+ return;
}
}
+ spin_unlock_irqrestore(&dpcm->cable->lock, flags);
}
static snd_pcm_uframes_t loopback_pointer(struct snd_pcm_substream *substream)
{
struct snd_pcm_runtime *runtime = substream->runtime;
struct loopback_pcm *dpcm = runtime->private_data;
+ snd_pcm_uframes_t pos;
+ spin_lock(&dpcm->cable->lock);
loopback_pos_update(dpcm->cable);
- return bytes_to_frames(runtime, dpcm->buf_pos);
+ pos = dpcm->buf_pos;
+ spin_unlock(&dpcm->cable->lock);
+ return bytes_to_frames(runtime, pos);
}
static struct snd_pcm_hardware loopback_pcm_hardware =
{
.info = (SNDRV_PCM_INFO_INTERLEAVED | SNDRV_PCM_INFO_MMAP |
- SNDRV_PCM_INFO_MMAP_VALID | SNDRV_PCM_INFO_PAUSE),
+ SNDRV_PCM_INFO_MMAP_VALID | SNDRV_PCM_INFO_PAUSE |
+ SNDRV_PCM_INFO_RESUME),
.formats = (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S16_BE |
SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S32_BE |
SNDRV_PCM_FMTBIT_FLOAT_LE | SNDRV_PCM_FMTBIT_FLOAT_BE),
@@ -575,7 +594,8 @@ static void loopback_runtime_free(struct snd_pcm_runtime *runtime)
static int loopback_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params)
{
- return snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(params));
+ return snd_pcm_lib_alloc_vmalloc_buffer(substream,
+ params_buffer_bytes(params));
}
static int loopback_hw_free(struct snd_pcm_substream *substream)
@@ -587,7 +607,7 @@ static int loopback_hw_free(struct snd_pcm_substream *substream)
mutex_lock(&dpcm->loopback->cable_lock);
cable->valid &= ~(1 << substream->stream);
mutex_unlock(&dpcm->loopback->cable_lock);
- return snd_pcm_lib_free_pages(substream);
+ return snd_pcm_lib_free_vmalloc_buffer(substream);
}
static unsigned int get_cable_index(struct snd_pcm_substream *substream)
@@ -740,6 +760,8 @@ static struct snd_pcm_ops loopback_playback_ops = {
.prepare = loopback_prepare,
.trigger = loopback_trigger,
.pointer = loopback_pointer,
+ .page = snd_pcm_lib_get_vmalloc_page,
+ .mmap = snd_pcm_lib_mmap_vmalloc,
};
static struct snd_pcm_ops loopback_capture_ops = {
@@ -751,10 +773,12 @@ static struct snd_pcm_ops loopback_capture_ops = {
.prepare = loopback_prepare,
.trigger = loopback_trigger,
.pointer = loopback_pointer,
+ .page = snd_pcm_lib_get_vmalloc_page,
+ .mmap = snd_pcm_lib_mmap_vmalloc,
};
-static int __devinit loopback_pcm_new(struct loopback *loopback,
- int device, int substreams)
+static int loopback_pcm_new(struct loopback *loopback,
+ int device, int substreams)
{
struct snd_pcm *pcm;
int err;
@@ -771,10 +795,6 @@ static int __devinit loopback_pcm_new(struct loopback *loopback,
strcpy(pcm->name, "Loopback PCM");
loopback->pcm[device] = pcm;
-
- snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_CONTINUOUS,
- snd_dma_continuous_data(GFP_KERNEL),
- 0, 2 * 1024 * 1024);
return 0;
}
@@ -932,7 +952,7 @@ static int loopback_channels_get(struct snd_kcontrol *kcontrol,
return 0;
}
-static struct snd_kcontrol_new loopback_controls[] __devinitdata = {
+static struct snd_kcontrol_new loopback_controls[] = {
{
.iface = SNDRV_CTL_ELEM_IFACE_PCM,
.name = "PCM Rate Shift 100000",
@@ -981,7 +1001,7 @@ static struct snd_kcontrol_new loopback_controls[] __devinitdata = {
}
};
-static int __devinit loopback_mixer_new(struct loopback *loopback, int notify)
+static int loopback_mixer_new(struct loopback *loopback, int notify)
{
struct snd_card *card = loopback->card;
struct snd_pcm *pcm;
@@ -1094,7 +1114,7 @@ static void print_cable_info(struct snd_info_entry *entry,
mutex_unlock(&loopback->cable_lock);
}
-static int __devinit loopback_proc_new(struct loopback *loopback, int cidx)
+static int loopback_proc_new(struct loopback *loopback, int cidx)
{
char name[32];
struct snd_info_entry *entry;
@@ -1115,15 +1135,15 @@ static int __devinit loopback_proc_new(struct loopback *loopback, int cidx)
#endif
-static int __devinit loopback_probe(struct platform_device *devptr)
+static int loopback_probe(struct platform_device *devptr)
{
struct snd_card *card;
struct loopback *loopback;
int dev = devptr->id;
int err;
- err = snd_card_create(index[dev], id[dev], THIS_MODULE,
- sizeof(struct loopback), &card);
+ err = snd_card_new(&devptr->dev, index[dev], id[dev], THIS_MODULE,
+ sizeof(struct loopback), &card);
if (err < 0)
return err;
loopback = card->private_data;
@@ -1160,18 +1180,16 @@ static int __devinit loopback_probe(struct platform_device *devptr)
return err;
}
-static int __devexit loopback_remove(struct platform_device *devptr)
+static int loopback_remove(struct platform_device *devptr)
{
snd_card_free(platform_get_drvdata(devptr));
- platform_set_drvdata(devptr, NULL);
return 0;
}
-#ifdef CONFIG_PM
-static int loopback_suspend(struct platform_device *pdev,
- pm_message_t state)
+#ifdef CONFIG_PM_SLEEP
+static int loopback_suspend(struct device *pdev)
{
- struct snd_card *card = platform_get_drvdata(pdev);
+ struct snd_card *card = dev_get_drvdata(pdev);
struct loopback *loopback = card->private_data;
snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);
@@ -1181,26 +1199,29 @@ static int loopback_suspend(struct platform_device *pdev,
return 0;
}
-static int loopback_resume(struct platform_device *pdev)
+static int loopback_resume(struct device *pdev)
{
- struct snd_card *card = platform_get_drvdata(pdev);
+ struct snd_card *card = dev_get_drvdata(pdev);
snd_power_change_state(card, SNDRV_CTL_POWER_D0);
return 0;
}
+
+static SIMPLE_DEV_PM_OPS(loopback_pm, loopback_suspend, loopback_resume);
+#define LOOPBACK_PM_OPS &loopback_pm
+#else
+#define LOOPBACK_PM_OPS NULL
#endif
#define SND_LOOPBACK_DRIVER "snd_aloop"
static struct platform_driver loopback_driver = {
.probe = loopback_probe,
- .remove = __devexit_p(loopback_remove),
-#ifdef CONFIG_PM
- .suspend = loopback_suspend,
- .resume = loopback_resume,
-#endif
+ .remove = loopback_remove,
.driver = {
- .name = SND_LOOPBACK_DRIVER
+ .name = SND_LOOPBACK_DRIVER,
+ .owner = THIS_MODULE,
+ .pm = LOOPBACK_PM_OPS,
},
};
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-11-10 07:12:22 +0000