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authorMark Brown <broonie@opensource.wolfsonmicro.com>2008-04-22 17:08:52 +0200
committerTakashi Iwai <tiwai@suse.de>2008-04-24 12:00:41 +0200
commit7a22323b231fe5d47804f98f31a70eb34c6104a9 (patch)
treeda5d3424f1fef8371a091fe82a4b3520df4279d6 /sound
parentd80fd0935e2c177ae58d85cb736684ff6c00314d (diff)
[ALSA] soc - Support PXA3xx AC97
The PXA3xx does not support the use of interrupts during reset and access to the GPIO status requires similar handling to that for PXA27x. 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/soc/pxa/pxa2xx-ac97.c29
1 files changed, 27 insertions, 2 deletions
diff --git a/sound/soc/pxa/pxa2xx-ac97.c b/sound/soc/pxa/pxa2xx-ac97.c
index 1092d58e8523..97ec2d90547c 100644
--- a/sound/soc/pxa/pxa2xx-ac97.c
+++ b/sound/soc/pxa/pxa2xx-ac97.c
@@ -61,7 +61,7 @@ static unsigned short pxa2xx_ac97_read(struct snd_ac97 *ac97,
mutex_lock(&car_mutex);
/* set up primary or secondary codec/modem space */
-#ifdef CONFIG_PXA27x
+#if defined(CONFIG_PXA27x) || defined(CONFIG_PXA3xx)
reg_addr = ac97->num ? &SAC_REG_BASE : &PAC_REG_BASE;
#else
if (reg == AC97_GPIO_STATUS)
@@ -111,7 +111,7 @@ static void pxa2xx_ac97_write(struct snd_ac97 *ac97, unsigned short reg,
mutex_lock(&car_mutex);
/* set up primary or secondary codec/modem space */
-#ifdef CONFIG_PXA27x
+#if defined(CONFIG_PXA27x) || defined(CONFIG_PXA3xx)
reg_addr = ac97->num ? &SAC_REG_BASE : &PAC_REG_BASE;
#else
if (reg == AC97_GPIO_STATUS)
@@ -134,6 +134,9 @@ static void pxa2xx_ac97_write(struct snd_ac97 *ac97, unsigned short reg,
static void pxa2xx_ac97_warm_reset(struct snd_ac97 *ac97)
{
+#ifdef CONFIG_PXA3xx
+ int timeout = 100;
+#endif
gsr_bits = 0;
#ifdef CONFIG_PXA27x
@@ -144,6 +147,11 @@ static void pxa2xx_ac97_warm_reset(struct snd_ac97 *ac97)
GCR |= GCR_WARM_RST;
pxa_gpio_mode(113 | GPIO_ALT_FN_2_OUT);
udelay(500);
+#elif defined(CONFIG_PXA3xx)
+ /* 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);
@@ -159,6 +167,16 @@ static void pxa2xx_ac97_warm_reset(struct snd_ac97 *ac97)
static void pxa2xx_ac97_cold_reset(struct snd_ac97 *ac97)
{
+#ifdef CONFIG_PXA3xx
+ int timeout = 1000;
+
+ /* 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 */
@@ -170,6 +188,13 @@ static void pxa2xx_ac97_cold_reset(struct snd_ac97 *ac97)
clk_disable(ac97conf_clk);
GCR = GCR_COLD_RST;
udelay(50);
+#elif defined(CONFIG_PXA3xx)
+ /* 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;