summaryrefslogtreecommitdiffstats
path: root/sound/arm/pxa2xx-ac97.c
diff options
context:
space:
mode:
Diffstat (limited to 'sound/arm/pxa2xx-ac97.c')
-rw-r--r--sound/arm/pxa2xx-ac97.c83
1 files changed, 71 insertions, 12 deletions
diff --git a/sound/arm/pxa2xx-ac97.c b/sound/arm/pxa2xx-ac97.c
index 5d86e680975..5b3274b465e 100644
--- 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>
@@ -27,6 +28,7 @@
#include <linux/mutex.h>
#include <asm/hardware.h>
#include <asm/arch/pxa-regs.h>
+#include <asm/arch/pxa2xx-gpio.h>
#include <asm/arch/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");
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-11-14 20:34:24 +0000