Merge branch 'upstream-davem' of master.kernel.org:/pub/scm/linux/kernel/git/jgarzik...

[pandora-kernel.git] / sound / arm / pxa2xx-ac97.c

diff --git a/sound/arm/pxa2xx-ac97.c b/sound/arm/pxa2xx-ac97.c
index 5d86e68..199cca3 100644 (file)
--- a/sound/arm/pxa2xx-ac97.c
+++ b/sound/arm/pxa2xx-ac97.c
@@ -16,6 +16,7 @@
 #include <linux/platform_device.h>
 #include <linux/interrupt.h>
 #include <linux/wait.h>
+#include <linux/clk.h>
 #include <linux/delay.h>
 
 #include <sound/core.h>
@@ -25,9 +26,10 @@
 
 #include <asm/irq.h>
 #include <linux/mutex.h>
-#include <asm/hardware.h>
-#include <asm/arch/pxa-regs.h>
-#include <asm/arch/audio.h>
+#include <mach/hardware.h>
+#include <mach/pxa-regs.h>
+#include <mach/pxa2xx-gpio.h>
+#include <mach/audio.h>
 
 #include "pxa2xx-pcm.h"
 
@@ -35,6 +37,10 @@
 static DEFINE_MUTEX(car_mutex);
 static DECLARE_WAIT_QUEUE_HEAD(gsr_wq);
 static volatile long gsr_bits;
+static struct clk *ac97_clk;
+#ifdef CONFIG_PXA27x
+static struct clk *ac97conf_clk;
+#endif
 
 /*
  * Beware PXA27x bugs:
@@ -66,7 +72,7 @@ static unsigned short pxa2xx_ac97_read(struct snd_ac97 *ac97, unsigned short reg
        if (wait_event_timeout(gsr_wq, (GSR | gsr_bits) & GSR_SDONE, 1) <= 0 &&
            !((GSR | gsr_bits) & GSR_SDONE)) {
                printk(KERN_ERR "%s: read error (ac97_reg=%d GSR=%#lx)\n",
-                               __FUNCTION__, reg, GSR | gsr_bits);
+                               __func__, reg, GSR | gsr_bits);
                val = -1;
                goto out;
        }
@@ -98,7 +104,7 @@ static void pxa2xx_ac97_write(struct snd_ac97 *ac97, unsigned short reg, unsigne
        if (wait_event_timeout(gsr_wq, (GSR | gsr_bits) & GSR_CDONE, 1) <= 0 &&
            !((GSR | gsr_bits) & GSR_CDONE))
                printk(KERN_ERR "%s: write error (ac97_reg=%d GSR=%#lx)\n",
-                               __FUNCTION__, reg, GSR | gsr_bits);
+                               __func__, reg, GSR | gsr_bits);
 
        mutex_unlock(&car_mutex);
 }
@@ -106,17 +112,35 @@ 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 */
 
        gsr_bits = 0;
 #ifdef CONFIG_PXA27x
        /* PXA27x Developers Manual section 13.5.2.2.1 */
-       pxa_set_cken(CKEN_AC97CONF, 1);
+       clk_enable(ac97conf_clk);
        udelay(5);
-       pxa_set_cken(CKEN_AC97CONF, 0);
+       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;
@@ -125,7 +149,7 @@ static void pxa2xx_ac97_reset(struct snd_ac97 *ac97)
 
        if (!((GSR | gsr_bits) & (GSR_PCR | GSR_SCR))) {
                printk(KERN_INFO "%s: cold reset timeout (GSR=%#lx)\n",
-                                __FUNCTION__, gsr_bits);
+                                __func__, gsr_bits);
 
                /* let's try warm reset */
                gsr_bits = 0;
@@ -137,6 +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);
@@ -144,7 +174,7 @@ static void pxa2xx_ac97_reset(struct snd_ac97 *ac97)
 
                if (!((GSR | gsr_bits) & (GSR_PCR | GSR_SCR)))
                        printk(KERN_INFO "%s: warm reset timeout (GSR=%#lx)\n",
-                                        __FUNCTION__, gsr_bits);
+                                        __func__, gsr_bits);
        }
 
        GCR &= ~(GCR_PRIRDY_IEN|GCR_SECRDY_IEN);
@@ -259,7 +289,7 @@ static int pxa2xx_ac97_do_suspend(struct snd_card *card, pm_message_t state)
        if (platform_ops && platform_ops->suspend)
                platform_ops->suspend(platform_ops->priv);
        GCR |= GCR_ACLINK_OFF;
-       pxa_set_cken(CKEN_AC97, 0);
+       clk_disable(ac97_clk);
 
        return 0;
 }
@@ -268,7 +298,7 @@ static int pxa2xx_ac97_do_resume(struct snd_card *card)
 {
        pxa2xx_audio_ops_t *platform_ops = card->dev->platform_data;
 
-       pxa_set_cken(CKEN_AC97, 1);
+       clk_enable(ac97_clk);
        if (platform_ops && platform_ops->resume)
                platform_ops->resume(platform_ops->priv);
        snd_ac97_resume(pxa2xx_ac97_ac97);
@@ -335,8 +365,21 @@ static int __devinit pxa2xx_ac97_probe(struct platform_device *dev)
 #ifdef CONFIG_PXA27x
        /* Use GPIO 113 as AC97 Reset on Bulverde */
        pxa_gpio_mode(113 | GPIO_ALT_FN_2_OUT);
+       ac97conf_clk = clk_get(&dev->dev, "AC97CONFCLK");
+       if (IS_ERR(ac97conf_clk)) {
+               ret = PTR_ERR(ac97conf_clk);
+               ac97conf_clk = NULL;
+               goto err;
+       }
 #endif
-       pxa_set_cken(CKEN_AC97, 1);
+
+       ac97_clk = clk_get(&dev->dev, "AC97CLK");
+       if (IS_ERR(ac97_clk)) {
+               ret = PTR_ERR(ac97_clk);
+               ac97_clk = NULL;
+               goto err;
+       }
+       clk_enable(ac97_clk);
 
        ret = snd_ac97_bus(card, 0, &pxa2xx_ac97_ops, NULL, &ac97_bus);
        if (ret)
@@ -361,11 +404,19 @@ static int __devinit pxa2xx_ac97_probe(struct platform_device *dev)
  err:
        if (card)
                snd_card_free(card);
-       if (CKEN & (1 << CKEN_AC97)) {
+       if (ac97_clk) {
                GCR |= GCR_ACLINK_OFF;
                free_irq(IRQ_AC97, NULL);
-               pxa_set_cken(CKEN_AC97, 0);
+               clk_disable(ac97_clk);
+               clk_put(ac97_clk);
+               ac97_clk = NULL;
+       }
+#ifdef CONFIG_PXA27x
+       if (ac97conf_clk) {
+               clk_put(ac97conf_clk);
+               ac97conf_clk = NULL;
        }
+#endif
        return ret;
 }
 
@@ -378,7 +429,13 @@ static int __devexit pxa2xx_ac97_remove(struct platform_device *dev)
                platform_set_drvdata(dev, NULL);
                GCR |= GCR_ACLINK_OFF;
                free_irq(IRQ_AC97, NULL);
-               pxa_set_cken(CKEN_AC97, 0);
+               clk_disable(ac97_clk);
+               clk_put(ac97_clk);
+               ac97_clk = NULL;
+#ifdef CONFIG_PXA27x
+               clk_put(ac97conf_clk);
+               ac97conf_clk = NULL;
+#endif
        }
 
        return 0;
@@ -391,6 +448,7 @@ static struct platform_driver pxa2xx_ac97_driver = {
        .resume         = pxa2xx_ac97_resume,
        .driver         = {
                .name   = "pxa2xx-ac97",
+               .owner  = THIS_MODULE,
        },
 };
 
@@ -410,3 +468,4 @@ module_exit(pxa2xx_ac97_exit);
 MODULE_AUTHOR("Nicolas Pitre");
 MODULE_DESCRIPTION("AC97 driver for the Intel PXA2xx chip");
 MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:pxa2xx-ac97");