ALSA: Separate common pxa2xx-ac97 code

ASoC and non-ASoC drivers for ACLINK on PXA share lot's of common code.
Move all common code into separate module snd-pxa2xx-lib.

[Fixed handing of SND_AC97_CODEC in Kconfig and some checkpatch warnings
 -- broonie]

Signed-off-by: Dmitry Baryshkov <dbaryshkov@gmail.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>

2 files changed, 11 insertions, 263 deletions

diff --git a/sound/soc/pxa/Kconfig b/sound/soc/pxa/Kconfig
index 9212c37a33b8..d1ccbdc8371b 100644
--- a/sound/soc/pxa/Kconfig
+++ b/sound/soc/pxa/Kconfig
@@ -13,6 +13,8 @@ config SND_PXA2XX_AC97
 config SND_PXA2XX_SOC_AC97
 	tristate
 	select AC97_BUS
+	select SND_ARM
+	select SND_PXA2XX_LIB
 	select SND_SOC_AC97_BUS
 
 config SND_PXA2XX_SOC_I2S
diff --git a/sound/soc/pxa/pxa2xx-ac97.c b/sound/soc/pxa/pxa2xx-ac97.c
index d94a495bd6bd..a80ae074b090 100644
--- a/sound/soc/pxa/pxa2xx-ac97.c
+++ b/sound/soc/pxa/pxa2xx-ac97.c
@@ -13,225 +13,30 @@
 #include <linux/init.h>
 #include <linux/module.h>
 #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>
-#include <sound/pcm.h>
 #include <sound/ac97_codec.h>
-#include <sound/initval.h>
 #include <sound/soc.h>
+#include <sound/pxa2xx-lib.h>
 
-#include <asm/irq.h>
-#include <linux/mutex.h>
 #include <mach/hardware.h>
 #include <mach/pxa-regs.h>
-#include <mach/pxa2xx-gpio.h>
-#include <mach/audio.h>
 
 #include "pxa2xx-pcm.h"
 #include "pxa2xx-ac97.h"
 
-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:
- *
- *   o Slot 12 read from modem space will hang controller.
- *   o CDONE, SDONE interrupt fails after any slot 12 IO.
- *
- * We therefore have an hybrid approach for waiting on SDONE (interrupt or
- * 1 jiffy timeout if interrupt never comes).
- */
-
-static unsigned short pxa2xx_ac97_read(struct snd_ac97 *ac97,
-	unsigned short reg)
-{
-	unsigned short val = -1;
-	volatile u32 *reg_addr;
-
-	mutex_lock(&car_mutex);
-
-	/* set up primary or secondary codec/modem space */
-#if defined(CONFIG_PXA27x) || defined(CONFIG_PXA3xx)
-	reg_addr = ac97->num ? &SAC_REG_BASE : &PAC_REG_BASE;
-#else
-	if (reg == AC97_GPIO_STATUS)
-		reg_addr = ac97->num ? &SMC_REG_BASE : &PMC_REG_BASE;
-	else
-		reg_addr = ac97->num ? &SAC_REG_BASE : &PAC_REG_BASE;
-#endif
-	reg_addr += (reg >> 1);
-
-#ifndef CONFIG_PXA27x
-	if (reg == AC97_GPIO_STATUS) {
-		/* read from controller cache */
-		val = *reg_addr;
-		goto out;
-	}
-#endif
-
-	/* start read access across the ac97 link */
-	GSR = GSR_CDONE | GSR_SDONE;
-	gsr_bits = 0;
-	val = *reg_addr;
-
-	wait_event_timeout(gsr_wq, (GSR | gsr_bits) & GSR_SDONE, 1);
-	if (!((GSR | gsr_bits) & GSR_SDONE)) {
-		printk(KERN_ERR "%s: read error (ac97_reg=%x GSR=%#lx)\n",
-				__func__, reg, GSR | gsr_bits);
-		val = -1;
-		goto out;
-	}
-
-	/* valid data now */
-	GSR = GSR_CDONE | GSR_SDONE;
-	gsr_bits = 0;
-	val = *reg_addr;
-	/* but we've just started another cycle... */
-	wait_event_timeout(gsr_wq, (GSR | gsr_bits) & GSR_SDONE, 1);
-
-out:	mutex_unlock(&car_mutex);
-	return val;
-}
-
-static void pxa2xx_ac97_write(struct snd_ac97 *ac97, unsigned short reg,
-	unsigned short val)
-{
-	volatile u32 *reg_addr;
-
-	mutex_lock(&car_mutex);
-
-	/* set up primary or secondary codec/modem space */
-#if defined(CONFIG_PXA27x) || defined(CONFIG_PXA3xx)
-	reg_addr = ac97->num ? &SAC_REG_BASE : &PAC_REG_BASE;
-#else
-	if (reg == AC97_GPIO_STATUS)
-		reg_addr = ac97->num ? &SMC_REG_BASE : &PMC_REG_BASE;
-	else
-		reg_addr = ac97->num ? &SAC_REG_BASE : &PAC_REG_BASE;
-#endif
-	reg_addr += (reg >> 1);
-
-	GSR = GSR_CDONE | GSR_SDONE;
-	gsr_bits = 0;
-	*reg_addr = val;
-	wait_event_timeout(gsr_wq, (GSR | gsr_bits) & GSR_CDONE, 1);
-	if (!((GSR | gsr_bits) & GSR_CDONE))
-		printk(KERN_ERR "%s: write error (ac97_reg=%x GSR=%#lx)\n",
-				__func__, reg, GSR | gsr_bits);
-
-	mutex_unlock(&car_mutex);
-}
-
 static void pxa2xx_ac97_warm_reset(struct snd_ac97 *ac97)
 {
-#ifdef CONFIG_PXA3xx
-	int timeout = 100;
-#endif
-	gsr_bits = 0;
-
-#ifdef CONFIG_PXA27x
-	/* warm reset broken on Bulverde,
-	   so manually keep AC97 reset high */
-	pxa_gpio_mode(113 | GPIO_OUT | GPIO_DFLT_HIGH);
-	udelay(10);
-	GCR |= GCR_WARM_RST;
-	pxa_gpio_mode(113 | GPIO_ALT_FN_2_OUT);
-	udelay(500);
-#elif defined(CONFIG_PXA3xx)
-	/* 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);
-#endif
-
-	if (!((GSR | gsr_bits) & (GSR_PCR | GSR_SCR)))
-		printk(KERN_INFO "%s: warm reset timeout (GSR=%#lx)\n",
-				 __func__, gsr_bits);
+	pxa2xx_ac97_try_warm_reset(ac97);
 
-	GCR &= ~(GCR_PRIRDY_IEN|GCR_SECRDY_IEN);
-	GCR |= GCR_SDONE_IE|GCR_CDONE_IE;
+	pxa2xx_ac97_finish_reset(ac97);
 }
 
 static void pxa2xx_ac97_cold_reset(struct snd_ac97 *ac97)
 {
-#ifdef CONFIG_PXA3xx
-	int timeout = 1000;
-
-	/* Hold CLKBPB for 100us */
-	GCR = 0;
-	GCR = GCR_CLKBPB;
-	udelay(100);
-	GCR = 0;
-#endif
+	pxa2xx_ac97_try_cold_reset(ac97);
 
-	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 */
-	clk_enable(ac97conf_clk);
-	udelay(5);
-	clk_disable(ac97conf_clk);
-	GCR = GCR_COLD_RST;
-	udelay(50);
-#elif defined(CONFIG_PXA3xx)
-	/* 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;
-	wait_event_timeout(gsr_wq, gsr_bits & (GSR_PCR | GSR_SCR), 1);
-#endif
-
-	if (!((GSR | gsr_bits) & (GSR_PCR | GSR_SCR)))
-		printk(KERN_INFO "%s: cold reset timeout (GSR=%#lx)\n",
-				 __func__, gsr_bits);
-
-	GCR &= ~(GCR_PRIRDY_IEN|GCR_SECRDY_IEN);
-	GCR |= GCR_SDONE_IE|GCR_CDONE_IE;
-}
-
-static irqreturn_t pxa2xx_ac97_irq(int irq, void *dev_id)
-{
-	long status;
-
-	status = GSR;
-	if (status) {
-		GSR = status;
-		gsr_bits |= status;
-		wake_up(&gsr_wq);
-
-#ifdef CONFIG_PXA27x
-		/* Although we don't use those we still need to clear them
-		   since they tend to spuriously trigger when MMC is used
-		   (hardware bug? go figure)... */
-		MISR = MISR_EOC;
-		PISR = PISR_EOC;
-		MCSR = MCSR_EOC;
-#endif
-
-		return IRQ_HANDLED;
-	}
-
-	return IRQ_NONE;
+	pxa2xx_ac97_finish_reset(ac97);
 }
 
 struct snd_ac97_bus_ops soc_ac97_ops = {
@@ -285,24 +90,13 @@ static struct pxa2xx_pcm_dma_params pxa2xx_ac97_pcm_mic_mono_in = {
 static int pxa2xx_ac97_suspend(struct platform_device *pdev,
 	struct snd_soc_dai *dai)
 {
-	GCR |= GCR_ACLINK_OFF;
-	clk_disable(ac97_clk);
-	return 0;
+	return pxa2xx_ac97_hw_suspend();
 }
 
 static int pxa2xx_ac97_resume(struct platform_device *pdev,
 	struct snd_soc_dai *dai)
 {
-	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);
-#ifdef CONFIG_PXA27x
-	/* Use GPIO 113 as AC97 Reset on Bulverde */
-	pxa_gpio_mode(113 | GPIO_ALT_FN_2_OUT);
-#endif
-	clk_enable(ac97_clk);
-	return 0;
+	return pxa2xx_ac97_hw_resume();
 }
 
 #else
@@ -313,61 +107,13 @@ static int pxa2xx_ac97_resume(struct platform_device *pdev,
 static int pxa2xx_ac97_probe(struct platform_device *pdev,
 			     struct snd_soc_dai *dai)
 {
-	int ret;
-
-	ret = request_irq(IRQ_AC97, pxa2xx_ac97_irq, IRQF_DISABLED, "AC97", NULL);
-	if (ret < 0)
-		goto err;
-
-	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);
-#ifdef CONFIG_PXA27x
-	/* Use GPIO 113 as AC97 Reset on Bulverde */
-	pxa_gpio_mode(113 | GPIO_ALT_FN_2_OUT);
-
-	ac97conf_clk = clk_get(&pdev->dev, "AC97CONFCLK");
-	if (IS_ERR(ac97conf_clk)) {
-		ret = PTR_ERR(ac97conf_clk);
-		ac97conf_clk = NULL;
-		goto err_irq;
-	}
-#endif
-	ac97_clk = clk_get(&pdev->dev, "AC97CLK");
-	if (IS_ERR(ac97_clk)) {
-		ret = PTR_ERR(ac97_clk);
-		ac97_clk = NULL;
-		goto err_irq;
-	}
-	clk_enable(ac97_clk);
-	return 0;
-
- err_irq:
-	GCR |= GCR_ACLINK_OFF;
-#ifdef CONFIG_PXA27x
-	if (ac97conf_clk) {
-		clk_put(ac97conf_clk);
-		ac97conf_clk = NULL;
-	}
-#endif
-	free_irq(IRQ_AC97, NULL);
- err:
-	return ret;
+	return pxa2xx_ac97_hw_probe(pdev);
 }
 
 static void pxa2xx_ac97_remove(struct platform_device *pdev,
 			       struct snd_soc_dai *dai)
 {
-	GCR |= GCR_ACLINK_OFF;
-	free_irq(IRQ_AC97, NULL);
-#ifdef CONFIG_PXA27x
-	clk_put(ac97conf_clk);
-	ac97conf_clk = NULL;
-#endif
-	clk_disable(ac97_clk);
-	clk_put(ac97_clk);
-	ac97_clk = NULL;
+	pxa2xx_ac97_hw_remove(pdev);
 }
 
 static int pxa2xx_ac97_hw_params(struct snd_pcm_substream *substream,