diff options
| author | Georg Chini <georg.chini@triaton-webhosting.com> | 2007-01-06 01:00:08 +0100 |
|---|---|---|
| committer | Adrian Bunk <bunk@stusta.de> | 2007-01-09 03:23:30 +0100 |
| commit | 223aa24029ccd32230fd4509edfa50cf067fb919 (patch) | |
| tree | b9e82300d7967cd1acbb1552069888b64f002364 /sound | |
| parent | 8059c0f97012c5bf881d9a158dcfd3843c025b9b (diff) | |
| download | lwn-223aa24029ccd32230fd4509edfa50cf067fb919.tar.gz lwn-223aa24029ccd32230fd4509edfa50cf067fb919.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>
Signed-off-by: Adrian Bunk <bunk@stusta.de>
Diffstat (limited to 'sound')
| -rw-r--r-- | sound/sparc/cs4231.c | 26 |
1 files changed, 12 insertions, 14 deletions
diff --git a/sound/sparc/cs4231.c b/sound/sparc/cs4231.c index fd6543998788..8441d6bfbc95 100644 --- a/sound/sparc/cs4231.c +++ b/sound/sparc/cs4231.c @@ -1271,7 +1271,7 @@ 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, @@ -1291,7 +1291,7 @@ 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, @@ -1799,7 +1799,7 @@ static irqreturn_t snd_cs4231_sbus_interrupt(int irq, void *dev_id, struct pt_re snd_cs4231_outm(chip, CS4231_IRQ_STATUS, ~CS4231_ALL_IRQS | ~status, 0); spin_unlock_irqrestore(&chip->lock, flags); - return 0; + return IRQ_HANDLED; } /* @@ -1824,7 +1824,6 @@ 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; @@ -1865,17 +1864,16 @@ 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 ) |