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-rw-r--r--sound/pci/ctxfi/cthardware.h1
-rw-r--r--sound/pci/ctxfi/cthw20k1.c6
-rw-r--r--sound/pci/ctxfi/cttimer.c76
3 files changed, 55 insertions, 28 deletions
diff --git a/sound/pci/ctxfi/cthardware.h b/sound/pci/ctxfi/cthardware.h
index 35350cf9d2f2..8f11644ddc92 100644
--- a/sound/pci/ctxfi/cthardware.h
+++ b/sound/pci/ctxfi/cthardware.h
@@ -147,6 +147,7 @@ struct hw {
int (*set_timer_irq)(struct hw *hw, int enable);
int (*set_timer_tick)(struct hw *hw, unsigned int tick);
+ unsigned int (*get_wc)(struct hw *hw);
void (*irq_callback)(void *data, unsigned int bit);
void *irq_callback_data;
diff --git a/sound/pci/ctxfi/cthw20k1.c b/sound/pci/ctxfi/cthw20k1.c
index df565c11fcca..b165466e1a54 100644
--- a/sound/pci/ctxfi/cthw20k1.c
+++ b/sound/pci/ctxfi/cthw20k1.c
@@ -1186,6 +1186,11 @@ static int set_timer_tick(struct hw *hw, unsigned int ticks)
return 0;
}
+static unsigned int get_wc(struct hw *hw)
+{
+ return hw_read_20kx(hw, WC);
+}
+
/* Card hardware initialization block */
struct dac_conf {
unsigned int msr; /* master sample rate in rsrs */
@@ -2235,6 +2240,7 @@ static struct hw ct20k1_preset __devinitdata = {
.set_timer_irq = set_timer_irq,
.set_timer_tick = set_timer_tick,
+ .get_wc = get_wc,
};
int __devinit create_20k1_hw_obj(struct hw **rhw)
diff --git a/sound/pci/ctxfi/cttimer.c b/sound/pci/ctxfi/cttimer.c
index ceda74e356cb..ec869a4fe2b3 100644
--- a/sound/pci/ctxfi/cttimer.c
+++ b/sound/pci/ctxfi/cttimer.c
@@ -47,6 +47,7 @@ struct ct_timer {
struct ct_timer_ops *ops;
struct list_head instance_head;
struct list_head running_head;
+ unsigned int wc; /* current wallclock */
unsigned int irq_handling:1; /* in IRQ handling */
unsigned int reprogram:1; /* need to reprogram the internval */
unsigned int running:1; /* global timer running */
@@ -136,6 +137,7 @@ static struct ct_timer_ops ct_systimer_ops = {
*/
#define CT_TIMER_FREQ 48000
+#define MIN_TICKS 1
#define MAX_TICKS ((1 << 13) - 1)
static void ct_xfitimer_irq_rearm(struct ct_timer *atimer, int ticks)
@@ -159,6 +161,12 @@ static void ct_xfitimer_irq_stop(struct ct_timer *atimer)
}
}
+static inline unsigned int ct_xfitimer_get_wc(struct ct_timer *atimer)
+{
+ struct hw *hw = atimer->atc->hw;
+ return hw->get_wc(hw);
+}
+
/*
* reprogram the timer interval;
* checks the running instance list and determines the next timer interval.
@@ -170,37 +178,46 @@ static void ct_xfitimer_irq_stop(struct ct_timer *atimer)
static int ct_xfitimer_reprogram(struct ct_timer *atimer)
{
struct ct_timer_instance *ti;
- int min_intr = -1;
+ unsigned int min_intr = (unsigned int)-1;
int updates = 0;
+ unsigned int wc, diff;
+ if (list_empty(&atimer->running_head)) {
+ ct_xfitimer_irq_stop(atimer);
+ atimer->reprogram = 0; /* clear flag */
+ return 0;
+ }
+
+ wc = ct_xfitimer_get_wc(atimer);
+ diff = wc - atimer->wc;
+ atimer->wc = wc;
list_for_each_entry(ti, &atimer->running_head, running_list) {
- struct snd_pcm_runtime *runtime;
- unsigned int pos, diff;
- int intr;
- runtime = ti->substream->runtime;
- pos = ti->substream->ops->pointer(ti->substream);
- if (pos < ti->position)
- diff = runtime->buffer_size - ti->position + pos;
- else
- diff = pos - ti->position;
- ti->position = pos;
- while (diff >= ti->frag_count) {
- ti->frag_count += runtime->period_size;
- ti->need_update = 1;
- updates++;
+ if (ti->frag_count > diff)
+ ti->frag_count -= diff;
+ else {
+ unsigned int pos;
+ unsigned int period_size, rate;
+
+ period_size = ti->substream->runtime->period_size;
+ rate = ti->substream->runtime->rate;
+ pos = ti->substream->ops->pointer(ti->substream);
+ if (pos / period_size != ti->position / period_size) {
+ ti->need_update = 1;
+ ti->position = pos;
+ updates++;
+ }
+ pos %= period_size;
+ pos = period_size - pos;
+ ti->frag_count = div_u64((u64)pos * CT_TIMER_FREQ +
+ rate - 1, rate);
}
- ti->frag_count -= diff;
- intr = div_u64((u64)ti->frag_count * CT_TIMER_FREQ,
- runtime->rate);
- if (min_intr < 0 || intr < min_intr)
- min_intr = intr;
+ if (ti->frag_count < min_intr)
+ min_intr = ti->frag_count;
}
- if (min_intr > 0)
- ct_xfitimer_irq_rearm(atimer, min_intr);
- else
- ct_xfitimer_irq_stop(atimer);
-
+ if (min_intr < MIN_TICKS)
+ min_intr = MIN_TICKS;
+ ct_xfitimer_irq_rearm(atimer, min_intr);
atimer->reprogram = 0; /* clear flag */
return updates;
}
@@ -253,13 +270,14 @@ static void ct_xfitimer_update(struct ct_timer *atimer)
unsigned long flags;
int update;
+ spin_lock_irqsave(&atimer->lock, flags);
if (atimer->irq_handling) {
/* reached from IRQ handler; let it handle later */
atimer->reprogram = 1;
+ spin_unlock_irqrestore(&atimer->lock, flags);
return;
}
- spin_lock_irqsave(&atimer->lock, flags);
ct_xfitimer_irq_stop(atimer);
update = ct_xfitimer_reprogram(atimer);
spin_unlock_irqrestore(&atimer->lock, flags);
@@ -273,6 +291,8 @@ static void ct_xfitimer_start(struct ct_timer_instance *ti)
unsigned long flags;
spin_lock_irqsave(&atimer->lock, flags);
+ if (list_empty(&ti->running_list))
+ atimer->wc = ct_xfitimer_get_wc(atimer);
list_add(&ti->running_list, &atimer->running_head);
spin_unlock_irqrestore(&atimer->lock, flags);
ct_xfitimer_update(atimer);
@@ -396,12 +416,12 @@ struct ct_timer *ct_timer_new(struct ct_atc *atc)
atimer->atc = atc;
hw = atc->hw;
if (!USE_SYSTEM_TIMER && hw->set_timer_irq) {
- printk(KERN_INFO "ctxfi: Use xfi-native timer\n");
+ snd_printd(KERN_INFO "ctxfi: Use xfi-native timer\n");
atimer->ops = &ct_xfitimer_ops;
hw->irq_callback_data = atimer;
hw->irq_callback = ct_timer_interrupt;
} else {
- printk(KERN_INFO "ctxfi: Use system timer\n");
+ snd_printd(KERN_INFO "ctxfi: Use system timer\n");
atimer->ops = &ct_systimer_ops;
}
return atimer;
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-16 12:08:15 +0000