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authorGeorg Chini <georg.chini@triaton-webhosting.com>2007-01-02 21:28:17 -0800
committerDavid S. Miller <davem@sunset.davemloft.net>2007-01-03 18:37:26 -0800
commitd35a1b9e10481c9f1d3b87e778a0f1f6a0a2dd48 (patch)
treefb110100baeafa0fc20a1849c74ca572a0458808 /sound
parentMerge master.kernel.org:/pub/scm/linux/kernel/git/davej/agpgart (diff)
downloadlinux-dev-d35a1b9e10481c9f1d3b87e778a0f1f6a0a2dd48.tar.xz
linux-dev-d35a1b9e10481c9f1d3b87e778a0f1f6a0a2dd48.zip
[SOUND] Sparc CS4231: Fix IRQ return value and initialization.
SBUS: Change IRQ-handler return value from 0 to IRQ_HANDLED and fix some initialisation problems. Change period_bytes_min from 4096 to 256 to allow driver to work with low latency (VOIP) applications. Hope this does not break EBUS. Signed-off-by: Georg Chini <georg.chini@triaton-webhosting.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'sound')
-rw-r--r--sound/sparc/cs4231.c26
1 files changed, 12 insertions, 14 deletions
diff --git a/sound/sparc/cs4231.c b/sound/sparc/cs4231.c
index edeb3d3c4c7e..78c412ae2234 100644
--- a/sound/sparc/cs4231.c
+++ b/sound/sparc/cs4231.c
@@ -1268,7 +1268,7 @@ static struct snd_pcm_hardware snd_cs4231_playback =
.channels_min = 1,
.channels_max = 2,
.buffer_bytes_max = (32*1024),
- .period_bytes_min = 4096,
+ .period_bytes_min = 256,
.period_bytes_max = (32*1024),
.periods_min = 1,
.periods_max = 1024,
@@ -1288,7 +1288,7 @@ static struct snd_pcm_hardware snd_cs4231_capture =
.channels_min = 1,
.channels_max = 2,
.buffer_bytes_max = (32*1024),
- .period_bytes_min = 4096,
+ .period_bytes_min = 256,
.period_bytes_max = (32*1024),
.periods_min = 1,
.periods_max = 1024,
@@ -1796,7 +1796,7 @@ static irqreturn_t snd_cs4231_sbus_interrupt(int irq, void *dev_id)
snd_cs4231_outm(chip, CS4231_IRQ_STATUS, ~CS4231_ALL_IRQS | ~status, 0);
spin_unlock_irqrestore(&chip->lock, flags);
- return 0;
+ return IRQ_HANDLED;
}
/*
@@ -1821,7 +1821,6 @@ static int sbus_dma_request(struct cs4231_dma_control *dma_cont, dma_addr_t bus_
if (!(csr & test))
goto out;
err = -EBUSY;
- csr = sbus_readl(base->regs + APCCSR);
test = APC_XINT_CNVA;
if ( base->dir == APC_PLAY )
test = APC_XINT_PNVA;
@@ -1862,17 +1861,16 @@ static void sbus_dma_enable(struct cs4231_dma_control *dma_cont, int on)
spin_lock_irqsave(&base->lock, flags);
if (!on) {
- if (base->dir == APC_PLAY) {
- sbus_writel(0, base->regs + base->dir + APCNVA);
- sbus_writel(1, base->regs + base->dir + APCC);
- }
- else
- {
- sbus_writel(0, base->regs + base->dir + APCNC);
- sbus_writel(0, base->regs + base->dir + APCVA);
- }
+ sbus_writel(0, base->regs + base->dir + APCNC);
+ sbus_writel(0, base->regs + base->dir + APCNVA);
+ sbus_writel(0, base->regs + base->dir + APCC);
+ sbus_writel(0, base->regs + base->dir + APCVA);
+
+ /* ACK any APC interrupts. */
+ csr = sbus_readl(base->regs + APCCSR);
+ sbus_writel(csr, base->regs + APCCSR);
}
- udelay(600);
+ udelay(1000);
csr = sbus_readl(base->regs + APCCSR);
shift = 0;
if ( base->dir == APC_PLAY )