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Diffstat (limited to 'sound/arm/pxa2xx-ac97-lib.c')
-rw-r--r--sound/arm/pxa2xx-ac97-lib.c118
1 files changed, 71 insertions, 47 deletions
diff --git a/sound/arm/pxa2xx-ac97-lib.c b/sound/arm/pxa2xx-ac97-lib.c
index 35afd0c33be..66de90ed30c 100644
--- a/sound/arm/pxa2xx-ac97-lib.c
+++ b/sound/arm/pxa2xx-ac97-lib.c
@@ -16,14 +16,15 @@
#include <linux/interrupt.h>
#include <linux/clk.h>
#include <linux/delay.h>
+#include <linux/module.h>
+#include <linux/io.h>
+#include <linux/gpio.h>
#include <sound/ac97_codec.h>
#include <sound/pxa2xx-lib.h>
-#include <asm/irq.h>
-#include <mach/hardware.h>
+#include <mach/irqs.h>
#include <mach/regs-ac97.h>
-#include <mach/pxa2xx-gpio.h>
#include <mach/audio.h>
static DEFINE_MUTEX(car_mutex);
@@ -31,6 +32,9 @@ static DECLARE_WAIT_QUEUE_HEAD(gsr_wq);
static volatile long gsr_bits;
static struct clk *ac97_clk;
static struct clk *ac97conf_clk;
+static int reset_gpio;
+
+extern void pxa27x_configure_ac97reset(int reset_gpio, bool to_gpio);
/*
* Beware PXA27x bugs:
@@ -113,8 +117,7 @@ static inline void pxa_ac97_warm_pxa25x(void)
{
gsr_bits = 0;
- GCR |= GCR_WARM_RST | GCR_PRIRDY_IEN | GCR_SECRDY_IEN;
- wait_event_timeout(gsr_wq, gsr_bits & (GSR_PCR | GSR_SCR), 1);
+ GCR |= GCR_WARM_RST;
}
static inline void pxa_ac97_cold_pxa25x(void)
@@ -125,8 +128,6 @@ static inline void pxa_ac97_cold_pxa25x(void)
gsr_bits = 0;
GCR = GCR_COLD_RST;
- GCR |= GCR_CDONE_IE|GCR_SDONE_IE;
- wait_event_timeout(gsr_wq, gsr_bits & (GSR_PCR | GSR_SCR), 1);
}
#endif
@@ -135,12 +136,11 @@ static inline void pxa_ac97_warm_pxa27x(void)
{
gsr_bits = 0;
- /* warm reset broken on Bulverde,
- so manually keep AC97 reset high */
- pxa_gpio_mode(113 | GPIO_OUT | GPIO_DFLT_HIGH);
+ /* warm reset broken on Bulverde, so manually keep AC97 reset high */
+ pxa27x_configure_ac97reset(reset_gpio, true);
udelay(10);
GCR |= GCR_WARM_RST;
- pxa_gpio_mode(113 | GPIO_ALT_FN_2_OUT);
+ pxa27x_configure_ac97reset(reset_gpio, false);
udelay(500);
}
@@ -155,28 +155,21 @@ static inline void pxa_ac97_cold_pxa27x(void)
clk_enable(ac97conf_clk);
udelay(5);
clk_disable(ac97conf_clk);
- GCR = GCR_COLD_RST;
- udelay(50);
+ GCR = GCR_COLD_RST | GCR_WARM_RST;
}
#endif
#ifdef CONFIG_PXA3xx
static inline void pxa_ac97_warm_pxa3xx(void)
{
- int timeout = 100;
-
gsr_bits = 0;
/* Can't use interrupts */
GCR |= GCR_WARM_RST;
- while (!((GSR | gsr_bits) & (GSR_PCR | GSR_SCR)) && timeout--)
- mdelay(1);
}
static inline void pxa_ac97_cold_pxa3xx(void)
{
- int timeout = 1000;
-
/* Hold CLKBPB for 100us */
GCR = 0;
GCR = GCR_CLKBPB;
@@ -192,13 +185,14 @@ static inline void pxa_ac97_cold_pxa3xx(void)
GCR &= ~(GCR_PRIRDY_IEN|GCR_SECRDY_IEN);
GCR = GCR_WARM_RST | GCR_COLD_RST;
- while (!(GSR & (GSR_PCR | GSR_SCR)) && timeout--)
- mdelay(10);
}
#endif
bool pxa2xx_ac97_try_warm_reset(struct snd_ac97 *ac97)
{
+ unsigned long gsr;
+ unsigned int timeout = 100;
+
#ifdef CONFIG_PXA25x
if (cpu_is_pxa25x())
pxa_ac97_warm_pxa25x();
@@ -214,11 +208,15 @@ bool pxa2xx_ac97_try_warm_reset(struct snd_ac97 *ac97)
pxa_ac97_warm_pxa3xx();
else
#endif
- BUG();
+ snd_BUG();
+
+ while (!((GSR | gsr_bits) & (GSR_PCR | GSR_SCR)) && timeout--)
+ mdelay(1);
- if (!((GSR | gsr_bits) & (GSR_PCR | GSR_SCR))) {
+ gsr = GSR | gsr_bits;
+ if (!(gsr & (GSR_PCR | GSR_SCR))) {
printk(KERN_INFO "%s: warm reset timeout (GSR=%#lx)\n",
- __func__, gsr_bits);
+ __func__, gsr);
return false;
}
@@ -229,6 +227,9 @@ EXPORT_SYMBOL_GPL(pxa2xx_ac97_try_warm_reset);
bool pxa2xx_ac97_try_cold_reset(struct snd_ac97 *ac97)
{
+ unsigned long gsr;
+ unsigned int timeout = 1000;
+
#ifdef CONFIG_PXA25x
if (cpu_is_pxa25x())
pxa_ac97_cold_pxa25x();
@@ -244,11 +245,15 @@ bool pxa2xx_ac97_try_cold_reset(struct snd_ac97 *ac97)
pxa_ac97_cold_pxa3xx();
else
#endif
- BUG();
+ snd_BUG();
- if (!((GSR | gsr_bits) & (GSR_PCR | GSR_SCR))) {
+ while (!((GSR | gsr_bits) & (GSR_PCR | GSR_SCR)) && timeout--)
+ mdelay(1);
+
+ gsr = GSR | gsr_bits;
+ if (!(gsr & (GSR_PCR | GSR_SCR))) {
printk(KERN_INFO "%s: cold reset timeout (GSR=%#lx)\n",
- __func__, gsr_bits);
+ __func__, gsr);
return false;
}
@@ -301,36 +306,53 @@ EXPORT_SYMBOL_GPL(pxa2xx_ac97_hw_suspend);
int pxa2xx_ac97_hw_resume(void)
{
- if (cpu_is_pxa25x() || cpu_is_pxa27x()) {
- pxa_gpio_mode(GPIO31_SYNC_AC97_MD);
- pxa_gpio_mode(GPIO30_SDATA_OUT_AC97_MD);
- pxa_gpio_mode(GPIO28_BITCLK_AC97_MD);
- pxa_gpio_mode(GPIO29_SDATA_IN_AC97_MD);
- }
- if (cpu_is_pxa27x()) {
- /* Use GPIO 113 as AC97 Reset on Bulverde */
- pxa_gpio_mode(113 | GPIO_ALT_FN_2_OUT);
- }
clk_enable(ac97_clk);
return 0;
}
EXPORT_SYMBOL_GPL(pxa2xx_ac97_hw_resume);
#endif
-int __devinit pxa2xx_ac97_hw_probe(struct platform_device *dev)
+int pxa2xx_ac97_hw_probe(struct platform_device *dev)
{
int ret;
-
- if (cpu_is_pxa25x() || cpu_is_pxa27x()) {
- pxa_gpio_mode(GPIO31_SYNC_AC97_MD);
- pxa_gpio_mode(GPIO30_SDATA_OUT_AC97_MD);
- pxa_gpio_mode(GPIO28_BITCLK_AC97_MD);
- pxa_gpio_mode(GPIO29_SDATA_IN_AC97_MD);
+ pxa2xx_audio_ops_t *pdata = dev->dev.platform_data;
+
+ if (pdata) {
+ switch (pdata->reset_gpio) {
+ case 95:
+ case 113:
+ reset_gpio = pdata->reset_gpio;
+ break;
+ case 0:
+ reset_gpio = 113;
+ break;
+ case -1:
+ break;
+ default:
+ dev_err(&dev->dev, "Invalid reset GPIO %d\n",
+ pdata->reset_gpio);
+ }
+ } else {
+ if (cpu_is_pxa27x())
+ reset_gpio = 113;
}
if (cpu_is_pxa27x()) {
- /* Use GPIO 113 as AC97 Reset on Bulverde */
- pxa_gpio_mode(113 | GPIO_ALT_FN_2_OUT);
+ /*
+ * This gpio is needed for a work-around to a bug in the ac97
+ * controller during warm reset. The direction and level is set
+ * here so that it is an output driven high when switching from
+ * AC97_nRESET alt function to generic gpio.
+ */
+ ret = gpio_request_one(reset_gpio, GPIOF_OUT_INIT_HIGH,
+ "pxa27x ac97 reset");
+ if (ret < 0) {
+ pr_err("%s: gpio_request_one() failed: %d\n",
+ __func__, ret);
+ goto err_conf;
+ }
+ pxa27x_configure_ac97reset(reset_gpio, false);
+
ac97conf_clk = clk_get(&dev->dev, "AC97CONFCLK");
if (IS_ERR(ac97conf_clk)) {
ret = PTR_ERR(ac97conf_clk);
@@ -350,7 +372,7 @@ int __devinit pxa2xx_ac97_hw_probe(struct platform_device *dev)
if (ret)
goto err_clk2;
- ret = request_irq(IRQ_AC97, pxa2xx_ac97_irq, IRQF_DISABLED, "AC97", NULL);
+ ret = request_irq(IRQ_AC97, pxa2xx_ac97_irq, 0, "AC97", NULL);
if (ret < 0)
goto err_irq;
@@ -373,6 +395,8 @@ EXPORT_SYMBOL_GPL(pxa2xx_ac97_hw_probe);
void pxa2xx_ac97_hw_remove(struct platform_device *dev)
{
+ if (cpu_is_pxa27x())
+ gpio_free(reset_gpio);
GCR |= GCR_ACLINK_OFF;
free_irq(IRQ_AC97, NULL);
if (ac97conf_clk) {
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-12-11 02:00:40 +0000