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[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>
This commit is contained in:
Mark Brown 2008-04-22 17:08:52 +02:00 committed by Takashi Iwai
parent d80fd0935e
commit 7a22323b23
1 changed files with 27 additions and 2 deletions
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29
sound/soc/pxa/pxa2xx-ac97.c
View File

@ -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;