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[SOUND] CS4231 SBus: Two fixes. 

Remove unnecessary sbus_dma_reset function and change sbus_dma_enable
to avoid occasional system crashes when stopping recording.

Signed-off-by: Georg Chini <georg.chini@triaton-webhosting.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Georg Chini 2007-08-01 21:55:58 -07:00 committed by David S. Miller
parent 3fc701d5d4
commit 3daadf3301
1 changed files with 5 additions and 37 deletions
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42
sound/sparc/cs4231.c
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@ -74,7 +74,6 @@ struct cs4231_dma_control {
void (*enable)(struct cs4231_dma_control *dma_cont, int on);
int (*request)(struct cs4231_dma_control *dma_cont, dma_addr_t bus_addr, size_t len);
unsigned int (*address)(struct cs4231_dma_control *dma_cont);
void (*reset)(struct snd_cs4231 *chip);
void (*preallocate)(struct snd_cs4231 *chip, struct snd_pcm *pcm);
#ifdef EBUS_SUPPORT
struct ebus_dma_info ebus_info;
@ -1214,10 +1213,6 @@ static int __init snd_cs4231_probe(struct snd_cs4231 *chip)
spin_lock_irqsave(&chip->lock, flags);
/* Reset DMA engine (sbus only). */
chip->p_dma.reset(chip);
__cs4231_readb(chip, CS4231P(chip, STATUS)); /* clear any pendings IRQ */
__cs4231_writeb(chip, 0, CS4231P(chip, STATUS));
mb();
@ -1861,14 +1856,13 @@ static void sbus_dma_enable(struct cs4231_dma_control *dma_cont, int on)
if (!on) {
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);
if ( base->dir == APC_PLAY ) {
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(1200);
}
udelay(1000);
csr = sbus_readl(base->regs + APCCSR);
shift = 0;
if ( base->dir == APC_PLAY )
@ -1894,23 +1888,6 @@ static unsigned int sbus_dma_addr(struct cs4231_dma_control *dma_cont)
return sbus_readl(base->regs + base->dir + APCVA);
}
static void sbus_dma_reset(struct snd_cs4231 *chip)
{
sbus_writel(APC_CHIP_RESET, chip->port + APCCSR);
sbus_writel(0x00, chip->port + APCCSR);
sbus_writel(sbus_readl(chip->port + APCCSR) | APC_CDC_RESET,
chip->port + APCCSR);
udelay(20);
sbus_writel(sbus_readl(chip->port + APCCSR) & ~APC_CDC_RESET,
chip->port + APCCSR);
sbus_writel(sbus_readl(chip->port + APCCSR) | (APC_XINT_ENA |
APC_XINT_PENA |
APC_XINT_CENA),
chip->port + APCCSR);
}
static void sbus_dma_preallocate(struct snd_cs4231 *chip, struct snd_pcm *pcm)
{
snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_SBUS,
@ -1986,14 +1963,12 @@ static int __init snd_cs4231_sbus_create(struct snd_card *card,
chip->p_dma.enable = sbus_dma_enable;
chip->p_dma.request = sbus_dma_request;
chip->p_dma.address = sbus_dma_addr;
chip->p_dma.reset = sbus_dma_reset;
chip->p_dma.preallocate = sbus_dma_preallocate;
chip->c_dma.prepare = sbus_dma_prepare;
chip->c_dma.enable = sbus_dma_enable;
chip->c_dma.request = sbus_dma_request;
chip->c_dma.address = sbus_dma_addr;
chip->c_dma.reset = sbus_dma_reset;
chip->c_dma.preallocate = sbus_dma_preallocate;
if (request_irq(sdev->irqs[0], snd_cs4231_sbus_interrupt,
@ -2087,11 +2062,6 @@ static unsigned int _ebus_dma_addr(struct cs4231_dma_control *dma_cont)
return ebus_dma_addr(&dma_cont->ebus_info);
}
static void _ebus_dma_reset(struct snd_cs4231 *chip)
{
return;
}
static void _ebus_dma_preallocate(struct snd_cs4231 *chip, struct snd_pcm *pcm)
{
snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
@ -2171,14 +2141,12 @@ static int __init snd_cs4231_ebus_create(struct snd_card *card,
chip->p_dma.enable = _ebus_dma_enable;
chip->p_dma.request = _ebus_dma_request;
chip->p_dma.address = _ebus_dma_addr;
chip->p_dma.reset = _ebus_dma_reset;
chip->p_dma.preallocate = _ebus_dma_preallocate;
chip->c_dma.prepare = _ebus_dma_prepare;
chip->c_dma.enable = _ebus_dma_enable;
chip->c_dma.request = _ebus_dma_request;
chip->c_dma.address = _ebus_dma_addr;
chip->c_dma.reset = _ebus_dma_reset;
chip->c_dma.preallocate = _ebus_dma_preallocate;
chip->port = ioremap(edev->resource[0].start, 0x10);