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>

1 files changed, 18 insertions, 229 deletions

diff --git a/sound/arm/pxa2xx-ac97.c b/sound/arm/pxa2xx-ac97.c
index 199cca3366df..cba71d867542 100644
--- a/sound/arm/pxa2xx-ac97.c
+++ b/sound/arm/pxa2xx-ac97.c
@@ -12,198 +12,27 @@
 
 #include <linux/init.h>
 #include <linux/module.h>
-#include <linux/kernel.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/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"
 
-
-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 space */
-        reg_addr = (ac97->num & 1) ? &SAC_REG_BASE : &PAC_REG_BASE;
-        reg_addr += (reg >> 1);
-
-        /* start read access across the ac97 link */
-        GSR = GSR_CDONE | GSR_SDONE;
-        gsr_bits = 0;
-        val = *reg_addr;
-        if (reg == AC97_GPIO_STATUS)
-                goto out;
-        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",
-                                __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 space */
-        reg_addr = (ac97->num & 1) ? &SAC_REG_BASE : &PAC_REG_BASE;
-        reg_addr += (reg >> 1);
-
-        GSR = GSR_CDONE | GSR_SDONE;
-        gsr_bits = 0;
-        *reg_addr = val;
-        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",
-                                __func__, reg, GSR | gsr_bits);
-
-        mutex_unlock(&car_mutex);
-}
-
 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 */
-        clk_enable(ac97conf_clk);
-        udelay(5);
-        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;
-        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);
-
-                /* let's try warm reset */
-                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)
-                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);
-#endif                  
-
-                if (!((GSR | gsr_bits) & (GSR_PCR | GSR_SCR)))
-                        printk(KERN_INFO "%s: warm 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;
+        if (!pxa2xx_ac97_try_cold_reset(ac97)) {
+                pxa2xx_ac97_try_warm_reset(ac97);
         }
 
-        return IRQ_NONE;
+        pxa2xx_ac97_finish_reset(ac97);
 }
 
 static struct snd_ac97_bus_ops pxa2xx_ac97_ops = {
@@ -288,17 +117,19 @@ static int pxa2xx_ac97_do_suspend(struct snd_card *card, pm_message_t state)
         snd_ac97_suspend(pxa2xx_ac97_ac97);
         if (platform_ops && platform_ops->suspend)
                 platform_ops->suspend(platform_ops->priv);
-        GCR |= GCR_ACLINK_OFF;
-        clk_disable(ac97_clk);
 
-        return 0;
+        return pxa2xx_ac97_hw_suspend();
 }
 
 static int pxa2xx_ac97_do_resume(struct snd_card *card)
 {
         pxa2xx_audio_ops_t *platform_ops = card->dev->platform_data;
+        int rc;
+
+        rc = pxa2xx_ac97_hw_resume();
+        if (rc)
+                return rc;
 
-        clk_enable(ac97_clk);
         if (platform_ops && platform_ops->resume)
                 platform_ops->resume(platform_ops->priv);
         snd_ac97_resume(pxa2xx_ac97_ac97);
@@ -354,40 +185,17 @@ static int __devinit pxa2xx_ac97_probe(struct platform_device *dev)
         if (ret)
                 goto err;
 
-        ret = request_irq(IRQ_AC97, pxa2xx_ac97_irq, 0, "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(&dev->dev, "AC97CONFCLK");
-        if (IS_ERR(ac97conf_clk)) {
-                ret = PTR_ERR(ac97conf_clk);
-                ac97conf_clk = NULL;
-                goto err;
-        }
-#endif
-
-        ac97_clk = clk_get(&dev->dev, "AC97CLK");
-        if (IS_ERR(ac97_clk)) {
-                ret = PTR_ERR(ac97_clk);
-                ac97_clk = NULL;
+        ret = pxa2xx_ac97_hw_probe(dev);
+        if (ret)
                 goto err;
-        }
-        clk_enable(ac97_clk);
 
         ret = snd_ac97_bus(card, 0, &pxa2xx_ac97_ops, NULL, &ac97_bus);
         if (ret)
-                goto err;
+                goto err_remove;
         memset(&ac97_template, 0, sizeof(ac97_template));
         ret = snd_ac97_mixer(ac97_bus, &ac97_template, &pxa2xx_ac97_ac97);
         if (ret)
-                goto err;
+                goto err_remove;
 
         snprintf(card->shortname, sizeof(card->shortname),
                  "%s", snd_ac97_get_short_name(pxa2xx_ac97_ac97));
@@ -401,22 +209,11 @@ static int __devinit pxa2xx_ac97_probe(struct platform_device *dev)
                 return 0;
         }
 
- err:
+err_remove:
+        pxa2xx_ac97_hw_remove(dev);
+err:
         if (card)
                 snd_card_free(card);
-        if (ac97_clk) {
-                GCR |= GCR_ACLINK_OFF;
-                free_irq(IRQ_AC97, NULL);
-                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;
 }
 
@@ -427,15 +224,7 @@ static int __devexit pxa2xx_ac97_remove(struct platform_device *dev)
         if (card) {
                 snd_card_free(card);
                 platform_set_drvdata(dev, NULL);
-                GCR |= GCR_ACLINK_OFF;
-                free_irq(IRQ_AC97, NULL);
-                clk_disable(ac97_clk);
-                clk_put(ac97_clk);
-                ac97_clk = NULL;
-#ifdef CONFIG_PXA27x
-                clk_put(ac97conf_clk);
-                ac97conf_clk = NULL;
-#endif
+                pxa2xx_ac97_hw_remove(dev);
         }
 
         return 0;