From: Mark Brown <broonie@opensource.wolfsonmicro.com>
Date: Tue, 22 Apr 2008 15:09:49 +0000 (+0200)
Subject: [ALSA] pxa2xx-ac97: Support PXA3xx AC97
X-Git-Tag: v2.6.26-rc1~1087^2~21
X-Git-Url: http://pilppa.com/gitweb/?a=commitdiff_plain;h=815c1be320fd51e5981c007f737aca410707baf8;p=linux-2.6-omap-h63xx.git

[ALSA] pxa2xx-ac97: Support PXA3xx AC97

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

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);