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ALSA: AACI: switch to per-pcm locking

Browse source 
We can use finer-grained locking, which makes things easier when
we gain DMA support.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Russell King 2009-12-18 17:48:50 +00:00 committed by Takashi Iwai
parent a08d56583f
commit d6a89fefa5
2 changed files with 30 additions and 21 deletions
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49
sound/arm/aaci.c
View file

@ -172,14 +172,15 @@ static unsigned short aaci_ac97_read(struct snd_ac97 *ac97, unsigned short reg)
return v; return v;
} }
static inline void aaci_chan_wait_ready(struct aaci_runtime *aacirun) static inline void
aaci_chan_wait_ready(struct aaci_runtime *aacirun, unsigned long mask)
{ {
u32 val; u32 val;
int timeout = 5000; int timeout = 5000;
do { do {
val = readl(aacirun->base + AACI_SR); val = readl(aacirun->base + AACI_SR);
} while (val & (SR_TXB|SR_RXB) && timeout--); } while (val & mask && timeout--);
} }
@ -208,8 +209,10 @@ static void aaci_fifo_irq(struct aaci *aaci, int channel, u32 mask)
writel(0, aacirun->base + AACI_IE); writel(0, aacirun->base + AACI_IE);
return; return;
} }
ptr = aacirun->ptr;
spin_lock(&aacirun->lock);
ptr = aacirun->ptr;
do { do {
unsigned int len = aacirun->fifosz; unsigned int len = aacirun->fifosz;
u32 val; u32 val;
@ -217,9 +220,9 @@ static void aaci_fifo_irq(struct aaci *aaci, int channel, u32 mask)
if (aacirun->bytes <= 0) { if (aacirun->bytes <= 0) {
aacirun->bytes += aacirun->period; aacirun->bytes += aacirun->period;
aacirun->ptr = ptr; aacirun->ptr = ptr;
spin_unlock(&aaci->lock); spin_unlock(&aacirun->lock);
snd_pcm_period_elapsed(aacirun->substream); snd_pcm_period_elapsed(aacirun->substream);
spin_lock(&aaci->lock); spin_lock(&aacirun->lock);
} }
if (!(aacirun->cr & CR_EN)) if (!(aacirun->cr & CR_EN))
break; break;
@ -245,7 +248,10 @@ static void aaci_fifo_irq(struct aaci *aaci, int channel, u32 mask)
ptr = aacirun->start; ptr = aacirun->start;
} }
} while(1); } while(1);
aacirun->ptr = ptr; aacirun->ptr = ptr;
spin_unlock(&aacirun->lock);
} }
if (mask & ISR_URINTR) { if (mask & ISR_URINTR) {
@ -263,6 +269,8 @@ static void aaci_fifo_irq(struct aaci *aaci, int channel, u32 mask)
return; return;
} }
spin_lock(&aacirun->lock);
ptr = aacirun->ptr; ptr = aacirun->ptr;
do { do {
unsigned int len = aacirun->fifosz; unsigned int len = aacirun->fifosz;
@ -271,9 +279,9 @@ static void aaci_fifo_irq(struct aaci *aaci, int channel, u32 mask)
if (aacirun->bytes <= 0) { if (aacirun->bytes <= 0) {
aacirun->bytes += aacirun->period; aacirun->bytes += aacirun->period;
aacirun->ptr = ptr; aacirun->ptr = ptr;
spin_unlock(&aaci->lock); spin_unlock(&aacirun->lock);
snd_pcm_period_elapsed(aacirun->substream); snd_pcm_period_elapsed(aacirun->substream);
spin_lock(&aaci->lock); spin_lock(&aacirun->lock);
} }
if (!(aacirun->cr & CR_EN)) if (!(aacirun->cr & CR_EN))
break; break;
@ -301,6 +309,8 @@ static void aaci_fifo_irq(struct aaci *aaci, int channel, u32 mask)
} while (1); } while (1);
aacirun->ptr = ptr; aacirun->ptr = ptr;
spin_unlock(&aacirun->lock);
} }
} }
@ -310,7 +320,6 @@ static irqreturn_t aaci_irq(int irq, void *devid)
u32 mask; u32 mask;
int i; int i;
spin_lock(&aaci->lock);
mask = readl(aaci->base + AACI_ALLINTS); mask = readl(aaci->base + AACI_ALLINTS);
if (mask) { if (mask) {
u32 m = mask; u32 m = mask;
@ -320,7 +329,6 @@ static irqreturn_t aaci_irq(int irq, void *devid)
} }
} }
} }
spin_unlock(&aaci->lock);
return mask ? IRQ_HANDLED : IRQ_NONE; return mask ? IRQ_HANDLED : IRQ_NONE;
} }
@ -580,7 +588,7 @@ static void aaci_pcm_playback_stop(struct aaci_runtime *aacirun)
ie &= ~(IE_URIE|IE_TXIE); ie &= ~(IE_URIE|IE_TXIE);
writel(ie, aacirun->base + AACI_IE); writel(ie, aacirun->base + AACI_IE);
aacirun->cr &= ~CR_EN; aacirun->cr &= ~CR_EN;
aaci_chan_wait_ready(aacirun); aaci_chan_wait_ready(aacirun, SR_TXB);
writel(aacirun->cr, aacirun->base + AACI_TXCR); writel(aacirun->cr, aacirun->base + AACI_TXCR);
} }
@ -588,7 +596,7 @@ static void aaci_pcm_playback_start(struct aaci_runtime *aacirun)
{ {
u32 ie; u32 ie;
aaci_chan_wait_ready(aacirun); aaci_chan_wait_ready(aacirun, SR_TXB);
aacirun->cr |= CR_EN; aacirun->cr |= CR_EN;
ie = readl(aacirun->base + AACI_IE); ie = readl(aacirun->base + AACI_IE);
@ -599,12 +607,12 @@ static void aaci_pcm_playback_start(struct aaci_runtime *aacirun)
static int aaci_pcm_playback_trigger(struct snd_pcm_substream *substream, int cmd) static int aaci_pcm_playback_trigger(struct snd_pcm_substream *substream, int cmd)
{ {
struct aaci *aaci = substream->private_data;
struct aaci_runtime *aacirun = substream->runtime->private_data; struct aaci_runtime *aacirun = substream->runtime->private_data;
unsigned long flags; unsigned long flags;
int ret = 0; int ret = 0;
spin_lock_irqsave(&aaci->lock, flags); spin_lock_irqsave(&aacirun->lock, flags);
switch (cmd) { switch (cmd) {
case SNDRV_PCM_TRIGGER_START: case SNDRV_PCM_TRIGGER_START:
aaci_pcm_playback_start(aacirun); aaci_pcm_playback_start(aacirun);
@ -631,7 +639,8 @@ static int aaci_pcm_playback_trigger(struct snd_pcm_substream *substream, int cm
default: default:
ret = -EINVAL; ret = -EINVAL;
} }
spin_unlock_irqrestore(&aaci->lock, flags);
spin_unlock_irqrestore(&aacirun->lock, flags);
return ret; return ret;
} }
@ -666,7 +675,7 @@ static void aaci_pcm_capture_stop(struct aaci_runtime *aacirun)
{ {
u32 ie; u32 ie;
aaci_chan_wait_ready(aacirun); aaci_chan_wait_ready(aacirun, SR_RXB);
ie = readl(aacirun->base + AACI_IE); ie = readl(aacirun->base + AACI_IE);
ie &= ~(IE_ORIE | IE_RXIE); ie &= ~(IE_ORIE | IE_RXIE);
@ -681,7 +690,7 @@ static void aaci_pcm_capture_start(struct aaci_runtime *aacirun)
{ {
u32 ie; u32 ie;
aaci_chan_wait_ready(aacirun); aaci_chan_wait_ready(aacirun, SR_RXB);
#ifdef DEBUG #ifdef DEBUG
/* RX Timeout value: bits 28:17 in RXCR */ /* RX Timeout value: bits 28:17 in RXCR */
@ -698,12 +707,11 @@ static void aaci_pcm_capture_start(struct aaci_runtime *aacirun)
static int aaci_pcm_capture_trigger(struct snd_pcm_substream *substream, int cmd) static int aaci_pcm_capture_trigger(struct snd_pcm_substream *substream, int cmd)
{ {
struct aaci *aaci = substream->private_data;
struct aaci_runtime *aacirun = substream->runtime->private_data; struct aaci_runtime *aacirun = substream->runtime->private_data;
unsigned long flags; unsigned long flags;
int ret = 0; int ret = 0;
spin_lock_irqsave(&aaci->lock, flags); spin_lock_irqsave(&aacirun->lock, flags);
switch (cmd) { switch (cmd) {
case SNDRV_PCM_TRIGGER_START: case SNDRV_PCM_TRIGGER_START:
@ -732,7 +740,7 @@ static int aaci_pcm_capture_trigger(struct snd_pcm_substream *substream, int cmd
ret = -EINVAL; ret = -EINVAL;
} }
spin_unlock_irqrestore(&aaci->lock, flags); spin_unlock_irqrestore(&aacirun->lock, flags);
return ret; return ret;
} }
@ -933,7 +941,6 @@ static struct aaci * __devinit aaci_init_card(struct amba_device *dev)
aaci = card->private_data; aaci = card->private_data;
mutex_init(&aaci->ac97_sem); mutex_init(&aaci->ac97_sem);
spin_lock_init(&aaci->lock);
aaci->card = card; aaci->card = card;
aaci->dev = dev; aaci->dev = dev;
@ -1020,12 +1027,14 @@ static int __devinit aaci_probe(struct amba_device *dev, struct amba_id *id)
/* /*
* Playback uses AACI channel 0 * Playback uses AACI channel 0
*/ */
spin_lock_init(&aaci->playback.lock);
aaci->playback.base = aaci->base + AACI_CSCH1; aaci->playback.base = aaci->base + AACI_CSCH1;
aaci->playback.fifo = aaci->base + AACI_DR1; aaci->playback.fifo = aaci->base + AACI_DR1;
/* /*
* Capture uses AACI channel 0 * Capture uses AACI channel 0
*/ */
spin_lock_init(&aaci->capture.lock);
aaci->capture.base = aaci->base + AACI_CSCH1; aaci->capture.base = aaci->base + AACI_CSCH1;
aaci->capture.fifo = aaci->base + AACI_DR1; aaci->capture.fifo = aaci->base + AACI_DR1;

2
sound/arm/aaci.h
View file

@ -202,6 +202,7 @@
struct aaci_runtime { struct aaci_runtime {
void __iomem *base; void __iomem *base;
void __iomem *fifo; void __iomem *fifo;
spinlock_t lock;
struct ac97_pcm *pcm; struct ac97_pcm *pcm;
int pcm_open; int pcm_open;
@ -232,7 +233,6 @@ struct aaci {
struct snd_ac97 *ac97; struct snd_ac97 *ac97;
u32 maincr; u32 maincr;
spinlock_t lock;
struct aaci_runtime playback; struct aaci_runtime playback;
struct aaci_runtime capture; struct aaci_runtime capture;