[ALSA] pxa2xx-ac97: Support PXA3xx AC97

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

1 files changed, 24 insertions, 0 deletions

diff --git a/sound/arm/pxa2xx-ac97.c b/sound/arm/pxa2xx-ac97.c
index 71fbf8d7ee82..5b3274b465eb 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);