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Diffstat (limited to 'sound/sh/aica.c')
-rw-r--r--sound/sh/aica.c31
1 files changed, 29 insertions, 2 deletions
diff --git a/sound/sh/aica.c b/sound/sh/aica.c
index 131ec481228..88dc840152c 100644
--- a/sound/sh/aica.c
+++ b/sound/sh/aica.c
@@ -106,11 +106,14 @@ static void spu_write_wait(void)
static void spu_memset(u32 toi, u32 what, int length)
{
int i;
+ unsigned long flags;
snd_assert(length % 4 == 0, return);
for (i = 0; i < length; i++) {
if (!(i % 8))
spu_write_wait();
+ local_irq_save(flags);
writel(what, toi + SPU_MEMORY_BASE);
+ local_irq_restore(flags);
toi++;
}
}
@@ -118,6 +121,7 @@ static void spu_memset(u32 toi, u32 what, int length)
/* spu_memload - write to SPU address space */
static void spu_memload(u32 toi, void *from, int length)
{
+ unsigned long flags;
u32 *froml = from;
u32 __iomem *to = (u32 __iomem *) (SPU_MEMORY_BASE + toi);
int i;
@@ -128,7 +132,9 @@ static void spu_memload(u32 toi, void *from, int length)
if (!(i % 8))
spu_write_wait();
val = *froml;
+ local_irq_save(flags);
writel(val, to);
+ local_irq_restore(flags);
froml++;
to++;
}
@@ -138,28 +144,36 @@ static void spu_memload(u32 toi, void *from, int length)
static void spu_disable(void)
{
int i;
+ unsigned long flags;
u32 regval;
spu_write_wait();
regval = readl(ARM_RESET_REGISTER);
regval |= 1;
spu_write_wait();
+ local_irq_save(flags);
writel(regval, ARM_RESET_REGISTER);
+ local_irq_restore(flags);
for (i = 0; i < 64; i++) {
spu_write_wait();
regval = readl(SPU_REGISTER_BASE + (i * 0x80));
regval = (regval & ~0x4000) | 0x8000;
spu_write_wait();
+ local_irq_save(flags);
writel(regval, SPU_REGISTER_BASE + (i * 0x80));
+ local_irq_restore(flags);
}
}
/* spu_enable - set spu registers to enable sound output */
static void spu_enable(void)
{
+ unsigned long flags;
u32 regval = readl(ARM_RESET_REGISTER);
regval &= ~1;
spu_write_wait();
+ local_irq_save(flags);
writel(regval, ARM_RESET_REGISTER);
+ local_irq_restore(flags);
}
/*
@@ -168,25 +182,34 @@ static void spu_enable(void)
*/
static void spu_reset(void)
{
+ unsigned long flags;
spu_disable();
spu_memset(0, 0, 0x200000 / 4);
/* Put ARM7 in endless loop */
+ local_irq_save(flags);
ctrl_outl(0xea000002, SPU_MEMORY_BASE);
+ local_irq_restore(flags);
spu_enable();
}
/* aica_chn_start - write to spu to start playback */
static void aica_chn_start(void)
{
+ unsigned long flags;
spu_write_wait();
+ local_irq_save(flags);
writel(AICA_CMD_KICK | AICA_CMD_START, (u32 *) AICA_CONTROL_POINT);
+ local_irq_restore(flags);
}
/* aica_chn_halt - write to spu to halt playback */
static void aica_chn_halt(void)
{
+ unsigned long flags;
spu_write_wait();
+ local_irq_save(flags);
writel(AICA_CMD_KICK | AICA_CMD_STOP, (u32 *) AICA_CONTROL_POINT);
+ local_irq_restore(flags);
}
/* ALSA code below */
@@ -213,12 +236,13 @@ static int aica_dma_transfer(int channels, int buffer_size,
int q, err, period_offset;
struct snd_card_aica *dreamcastcard;
struct snd_pcm_runtime *runtime;
- err = 0;
+ unsigned long flags;
dreamcastcard = substream->pcm->private_data;
period_offset = dreamcastcard->clicks;
period_offset %= (AICA_PERIOD_NUMBER / channels);
runtime = substream->runtime;
for (q = 0; q < channels; q++) {
+ local_irq_save(flags);
err = dma_xfer(AICA_DMA_CHANNEL,
(unsigned long) (runtime->dma_area +
(AICA_BUFFER_SIZE * q) /
@@ -228,9 +252,12 @@ static int aica_dma_transfer(int channels, int buffer_size,
AICA_CHANNEL0_OFFSET + q * CHANNEL_OFFSET +
AICA_PERIOD_SIZE * period_offset,
buffer_size / channels, AICA_DMA_MODE);
- if (unlikely(err < 0))
+ if (unlikely(err < 0)) {
+ local_irq_restore(flags);
break;
+ }
dma_wait_for_completion(AICA_DMA_CHANNEL);
+ local_irq_restore(flags);
}
return err;
}