[ALSA] pxa2xx-ac97: Support PXA3xx AC97
Mark Brown [Tue, 22 Apr 2008 15:09:49 +0000 (17:09 +0200)]
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/arm/pxa2xx-ac97.c

index 71fbf8d..5b3274b 100644 (file)
@@ -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);