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authorMark Brown <broonie@opensource.wolfsonmicro.com>2008-04-22 17:09:49 +0200
committerTakashi Iwai <tiwai@suse.de>2008-04-24 12:00:41 +0200
commit815c1be320fd51e5981c007f737aca410707baf8 (patch)
tree80fce6967f5cba86f03449b5e8764542abd37899 /sound
parent7a22323b231fe5d47804f98f31a70eb34c6104a9 (diff)
[ALSA] pxa2xx-ac97: Support PXA3xx AC97
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound')
-rw-r--r--sound/arm/pxa2xx-ac97.c24
1 files changed, 24 insertions, 0 deletions
diff --git a/sound/arm/pxa2xx-ac97.c b/sound/arm/pxa2xx-ac97.c
index 71fbf8d7ee8..5b3274b465e 100644
--- a/sound/arm/pxa2xx-ac97.c
+++ b/sound/arm/pxa2xx-ac97.c
@@ -112,6 +112,16 @@ static void pxa2xx_ac97_write(struct snd_ac97 *ac97, unsigned short reg, unsigne
static void pxa2xx_ac97_reset(struct snd_ac97 *ac97)
{
/* First, try cold reset */
+#ifdef CONFIG_PXA3xx
+ int timeout;
+
+ /* Hold CLKBPB for 100us */
+ GCR = 0;
+ GCR = GCR_CLKBPB;
+ udelay(100);
+ GCR = 0;
+#endif
+
GCR &= GCR_COLD_RST; /* clear everything but nCRST */
GCR &= ~GCR_COLD_RST; /* then assert nCRST */
@@ -123,6 +133,14 @@ static void pxa2xx_ac97_reset(struct snd_ac97 *ac97)
clk_disable(ac97conf_clk);
GCR = GCR_COLD_RST;
udelay(50);
+#elif defined(CONFIG_PXA3xx)
+ timeout = 1000;
+ /* Can't use interrupts on PXA3xx */
+ GCR &= ~(GCR_PRIRDY_IEN|GCR_SECRDY_IEN);
+
+ GCR = GCR_WARM_RST | GCR_COLD_RST;
+ while (!(GSR & (GSR_PCR | GSR_SCR)) && timeout--)
+ mdelay(10);
#else
GCR = GCR_COLD_RST;
GCR |= GCR_CDONE_IE|GCR_SDONE_IE;
@@ -143,6 +161,12 @@ static void pxa2xx_ac97_reset(struct snd_ac97 *ac97)
GCR |= GCR_WARM_RST;
pxa_gpio_mode(113 | GPIO_ALT_FN_2_OUT);
udelay(500);
+#elif defined(CONFIG_PXA3xx)
+ timeout = 100;
+ /* Can't use interrupts */
+ GCR |= GCR_WARM_RST;
+ while (!((GSR | gsr_bits) & (GSR_PCR | GSR_SCR)) && timeout--)
+ mdelay(1);
#else
GCR |= GCR_WARM_RST|GCR_PRIRDY_IEN|GCR_SECRDY_IEN;
wait_event_timeout(gsr_wq, gsr_bits & (GSR_PCR | GSR_SCR), 1);