ASoC: ac97: Support multi-platform AC'97

Currently we can only have a single platform built in with AC'97 support
due to the use of a global variable to provide the bus operations. Fix
this by making that variable a pointer and having the bus drivers set the
operations prior to registering.

This is not a particularly good or nice approach but it avoids blocking
multiplatform and a real fix involves fixing the fairly deep problems
with AC'97 support - we should be converting it to a real bus.

Acked-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Mark Brown <broonie@linaro.org>

6 files changed, 46 insertions, 45 deletions

diff --git a/sound/soc/codecs/ac97.c b/sound/soc/codecs/ac97.c
index ef2ae32..ec73518 100644
--- a/sound/soc/codecs/ac97.c
+++ b/sound/soc/codecs/ac97.c
@@ -62,13 +62,13 @@ static struct snd_soc_dai_driver ac97_dai = {
 static unsigned int ac97_read(struct snd_soc_codec *codec,
 	unsigned int reg)
 {
-	return soc_ac97_ops.read(codec->ac97, reg);
+	return soc_ac97_ops->read(codec->ac97, reg);
 }
 
 static int ac97_write(struct snd_soc_codec *codec, unsigned int reg,
 	unsigned int val)
 {
-	soc_ac97_ops.write(codec->ac97, reg, val);
+	soc_ac97_ops->write(codec->ac97, reg, val);
 	return 0;
 }
 
@@ -79,7 +79,8 @@ static int ac97_soc_probe(struct snd_soc_codec *codec)
 	int ret;
 
 	/* add codec as bus device for standard ac97 */
-	ret = snd_ac97_bus(codec->card->snd_card, 0, &soc_ac97_ops, NULL, &ac97_bus);
+	ret = snd_ac97_bus(codec->card->snd_card, 0, soc_ac97_ops, NULL,
+			   &ac97_bus);
 	if (ret < 0)
 		return ret;
 
diff --git a/sound/soc/codecs/ad1980.c b/sound/soc/codecs/ad1980.c
index f385342..89fcf7d 100644
--- a/sound/soc/codecs/ad1980.c
+++ b/sound/soc/codecs/ad1980.c
@@ -108,7 +108,7 @@ static unsigned int ac97_read(struct snd_soc_codec *codec,
 	case AC97_EXTENDED_STATUS:
 	case AC97_VENDOR_ID1:
 	case AC97_VENDOR_ID2:
-		return soc_ac97_ops.read(codec->ac97, reg);
+		return soc_ac97_ops->read(codec->ac97, reg);
 	default:
 		reg = reg >> 1;
 
@@ -124,7 +124,7 @@ static int ac97_write(struct snd_soc_codec *codec, unsigned int reg,
 {
 	u16 *cache = codec->reg_cache;
 
-	soc_ac97_ops.write(codec->ac97, reg, val);
+	soc_ac97_ops->write(codec->ac97, reg, val);
 	reg = reg >> 1;
 	if (reg < ARRAY_SIZE(ad1980_reg))
 		cache[reg] = val;
@@ -154,13 +154,13 @@ static int ad1980_reset(struct snd_soc_codec *codec, int try_warm)
 	u16 retry_cnt = 0;
 
 retry:
-	if (try_warm && soc_ac97_ops.warm_reset) {
-		soc_ac97_ops.warm_reset(codec->ac97);
+	if (try_warm && soc_ac97_ops->warm_reset) {
+		soc_ac97_ops->warm_reset(codec->ac97);
 		if (ac97_read(codec, AC97_RESET) == 0x0090)
 			return 1;
 	}
 
-	soc_ac97_ops.reset(codec->ac97);
+	soc_ac97_ops->reset(codec->ac97);
 	/* Set bit 16slot in register 74h, then every slot will has only 16
 	 * bits. This command is sent out in 20bit mode, in which case the
 	 * first nibble of data is eaten by the addr. (Tag is always 16 bit)*/
@@ -186,7 +186,7 @@ static int ad1980_soc_probe(struct snd_soc_codec *codec)
 
 	printk(KERN_INFO "AD1980 SoC Audio Codec\n");
 
-	ret = snd_soc_new_ac97_codec(codec, &soc_ac97_ops, 0);
+	ret = snd_soc_new_ac97_codec(codec, soc_ac97_ops, 0);
 	if (ret < 0) {
 		printk(KERN_ERR "ad1980: failed to register AC97 codec\n");
 		return ret;
diff --git a/sound/soc/codecs/stac9766.c b/sound/soc/codecs/stac9766.c
index cbc7ae3..a5455c1 100644
--- a/sound/soc/codecs/stac9766.c
+++ b/sound/soc/codecs/stac9766.c
@@ -143,14 +143,14 @@ static int stac9766_ac97_write(struct snd_soc_codec *codec, unsigned int reg,
 
 	if (reg > AC97_STAC_PAGE0) {
 		stac9766_ac97_write(codec, AC97_INT_PAGING, 0);
-		soc_ac97_ops.write(codec->ac97, reg, val);
+		soc_ac97_ops->write(codec->ac97, reg, val);
 		stac9766_ac97_write(codec, AC97_INT_PAGING, 1);
 		return 0;
 	}
 	if (reg / 2 >= ARRAY_SIZE(stac9766_reg))
 		return -EIO;
 
-	soc_ac97_ops.write(codec->ac97, reg, val);
+	soc_ac97_ops->write(codec->ac97, reg, val);
 	cache[reg / 2] = val;
 	return 0;
 }
@@ -162,7 +162,7 @@ static unsigned int stac9766_ac97_read(struct snd_soc_codec *codec,
 
 	if (reg > AC97_STAC_PAGE0) {
 		stac9766_ac97_write(codec, AC97_INT_PAGING, 0);
-		val = soc_ac97_ops.read(codec->ac97, reg - AC97_STAC_PAGE0);
+		val = soc_ac97_ops->read(codec->ac97, reg - AC97_STAC_PAGE0);
 		stac9766_ac97_write(codec, AC97_INT_PAGING, 1);
 		return val;
 	}
@@ -173,7 +173,7 @@ static unsigned int stac9766_ac97_read(struct snd_soc_codec *codec,
 		reg == AC97_INT_PAGING || reg == AC97_VENDOR_ID1 ||
 		reg == AC97_VENDOR_ID2) {
 
-		val = soc_ac97_ops.read(codec->ac97, reg);
+		val = soc_ac97_ops->read(codec->ac97, reg);
 		return val;
 	}
 	return cache[reg / 2];
@@ -240,15 +240,15 @@ static int stac9766_set_bias_level(struct snd_soc_codec *codec,
 
 static int stac9766_reset(struct snd_soc_codec *codec, int try_warm)
 {
-	if (try_warm && soc_ac97_ops.warm_reset) {
-		soc_ac97_ops.warm_reset(codec->ac97);
+	if (try_warm && soc_ac97_ops->warm_reset) {
+		soc_ac97_ops->warm_reset(codec->ac97);
 		if (stac9766_ac97_read(codec, 0) == stac9766_reg[0])
 			return 1;
 	}
 
-	soc_ac97_ops.reset(codec->ac97);
-	if (soc_ac97_ops.warm_reset)
-		soc_ac97_ops.warm_reset(codec->ac97);
+	soc_ac97_ops->reset(codec->ac97);
+	if (soc_ac97_ops->warm_reset)
+		soc_ac97_ops->warm_reset(codec->ac97);
 	if (stac9766_ac97_read(codec, 0) != stac9766_reg[0])
 		return -EIO;
 	return 0;
@@ -272,7 +272,7 @@ reset:
 		return -EIO;
 	}
 	codec->ac97->bus->ops->warm_reset(codec->ac97);
-	id = soc_ac97_ops.read(codec->ac97, AC97_VENDOR_ID2);
+	id = soc_ac97_ops->read(codec->ac97, AC97_VENDOR_ID2);
 	if (id != 0x4c13) {
 		stac9766_reset(codec, 0);
 		reset++;
@@ -336,7 +336,7 @@ static int stac9766_codec_probe(struct snd_soc_codec *codec)
 {
 	int ret = 0;
 
-	ret = snd_soc_new_ac97_codec(codec, &soc_ac97_ops, 0);
+	ret = snd_soc_new_ac97_codec(codec, soc_ac97_ops, 0);
 	if (ret < 0)
 		goto codec_err;
 
diff --git a/sound/soc/codecs/wm9705.c b/sound/soc/codecs/wm9705.c
index a5fc61d..70ce6793 100644
--- a/sound/soc/codecs/wm9705.c
+++ b/sound/soc/codecs/wm9705.c
@@ -209,7 +209,7 @@ static unsigned int ac97_read(struct snd_soc_codec *codec, unsigned int reg)
 	case AC97_RESET:
 	case AC97_VENDOR_ID1:
 	case AC97_VENDOR_ID2:
-		return soc_ac97_ops.read(codec->ac97, reg);
+		return soc_ac97_ops->read(codec->ac97, reg);
 	default:
 		reg = reg >> 1;
 
@@ -225,7 +225,7 @@ static int ac97_write(struct snd_soc_codec *codec, unsigned int reg,
 {
 	u16 *cache = codec->reg_cache;
 
-	soc_ac97_ops.write(codec->ac97, reg, val);
+	soc_ac97_ops->write(codec->ac97, reg, val);
 	reg = reg >> 1;
 	if (reg < (ARRAY_SIZE(wm9705_reg)))
 		cache[reg] = val;
@@ -294,8 +294,8 @@ static struct snd_soc_dai_driver wm9705_dai[] = {
 
 static int wm9705_reset(struct snd_soc_codec *codec)
 {
-	if (soc_ac97_ops.reset) {
-		soc_ac97_ops.reset(codec->ac97);
+	if (soc_ac97_ops->reset) {
+		soc_ac97_ops->reset(codec->ac97);
 		if (ac97_read(codec, 0) == wm9705_reg[0])
 			return 0; /* Success */
 	}
@@ -306,7 +306,7 @@ static int wm9705_reset(struct snd_soc_codec *codec)
 #ifdef CONFIG_PM
 static int wm9705_soc_suspend(struct snd_soc_codec *codec)
 {
-	soc_ac97_ops.write(codec->ac97, AC97_POWERDOWN, 0xffff);
+	soc_ac97_ops->write(codec->ac97, AC97_POWERDOWN, 0xffff);
 
 	return 0;
 }
@@ -323,7 +323,7 @@ static int wm9705_soc_resume(struct snd_soc_codec *codec)
 	}
 
 	for (i = 2; i < ARRAY_SIZE(wm9705_reg) << 1; i += 2) {
-		soc_ac97_ops.write(codec->ac97, i, cache[i>>1]);
+		soc_ac97_ops->write(codec->ac97, i, cache[i>>1]);
 	}
 
 	return 0;
@@ -337,7 +337,7 @@ static int wm9705_soc_probe(struct snd_soc_codec *codec)
 {
 	int ret = 0;
 
-	ret = snd_soc_new_ac97_codec(codec, &soc_ac97_ops, 0);
+	ret = snd_soc_new_ac97_codec(codec, soc_ac97_ops, 0);
 	if (ret < 0) {
 		printk(KERN_ERR "wm9705: failed to register AC97 codec\n");
 		return ret;
diff --git a/sound/soc/codecs/wm9712.c b/sound/soc/codecs/wm9712.c
index 8e9a6a3..c5eb746 100644
--- a/sound/soc/codecs/wm9712.c
+++ b/sound/soc/codecs/wm9712.c
@@ -455,7 +455,7 @@ static unsigned int ac97_read(struct snd_soc_codec *codec,
 	if (reg == AC97_RESET || reg == AC97_GPIO_STATUS ||
 		reg == AC97_VENDOR_ID1 || reg == AC97_VENDOR_ID2 ||
 		reg == AC97_REC_GAIN)
-		return soc_ac97_ops.read(codec->ac97, reg);
+		return soc_ac97_ops->read(codec->ac97, reg);
 	else {
 		reg = reg >> 1;
 
@@ -472,7 +472,7 @@ static int ac97_write(struct snd_soc_codec *codec, unsigned int reg,
 	u16 *cache = codec->reg_cache;
 
 	if (reg < 0x7c)
-		soc_ac97_ops.write(codec->ac97, reg, val);
+		soc_ac97_ops->write(codec->ac97, reg, val);
 	reg = reg >> 1;
 	if (reg < (ARRAY_SIZE(wm9712_reg)))
 		cache[reg] = val;
@@ -581,15 +581,15 @@ static int wm9712_set_bias_level(struct snd_soc_codec *codec,
 
 static int wm9712_reset(struct snd_soc_codec *codec, int try_warm)
 {
-	if (try_warm && soc_ac97_ops.warm_reset) {
-		soc_ac97_ops.warm_reset(codec->ac97);
+	if (try_warm && soc_ac97_ops->warm_reset) {
+		soc_ac97_ops->warm_reset(codec->ac97);
 		if (ac97_read(codec, 0) == wm9712_reg[0])
 			return 1;
 	}
 
-	soc_ac97_ops.reset(codec->ac97);
-	if (soc_ac97_ops.warm_reset)
-		soc_ac97_ops.warm_reset(codec->ac97);
+	soc_ac97_ops->reset(codec->ac97);
+	if (soc_ac97_ops->warm_reset)
+		soc_ac97_ops->warm_reset(codec->ac97);
 	if (ac97_read(codec, 0) != wm9712_reg[0])
 		goto err;
 	return 0;
@@ -624,7 +624,7 @@ static int wm9712_soc_resume(struct snd_soc_codec *codec)
 			if (i == AC97_INT_PAGING || i == AC97_POWERDOWN ||
 			    (i > 0x58 && i != 0x5c))
 				continue;
-			soc_ac97_ops.write(codec->ac97, i, cache[i>>1]);
+			soc_ac97_ops->write(codec->ac97, i, cache[i>>1]);
 		}
 	}
 
@@ -635,7 +635,7 @@ static int wm9712_soc_probe(struct snd_soc_codec *codec)
 {
 	int ret = 0;
 
-	ret = snd_soc_new_ac97_codec(codec, &soc_ac97_ops, 0);
+	ret = snd_soc_new_ac97_codec(codec, soc_ac97_ops, 0);
 	if (ret < 0) {
 		printk(KERN_ERR "wm9712: failed to register AC97 codec\n");
 		return ret;
diff --git a/sound/soc/codecs/wm9713.c b/sound/soc/codecs/wm9713.c
index f7afa68..a53e175 100644
--- a/sound/soc/codecs/wm9713.c
+++ b/sound/soc/codecs/wm9713.c
@@ -652,7 +652,7 @@ static unsigned int ac97_read(struct snd_soc_codec *codec,
 	if (reg == AC97_RESET || reg == AC97_GPIO_STATUS ||
 		reg == AC97_VENDOR_ID1 || reg == AC97_VENDOR_ID2 ||
 		reg == AC97_CD)
-		return soc_ac97_ops.read(codec->ac97, reg);
+		return soc_ac97_ops->read(codec->ac97, reg);
 	else {
 		reg = reg >> 1;
 
@@ -668,7 +668,7 @@ static int ac97_write(struct snd_soc_codec *codec, unsigned int reg,
 {
 	u16 *cache = codec->reg_cache;
 	if (reg < 0x7c)
-		soc_ac97_ops.write(codec->ac97, reg, val);
+		soc_ac97_ops->write(codec->ac97, reg, val);
 	reg = reg >> 1;
 	if (reg < (ARRAY_SIZE(wm9713_reg)))
 		cache[reg] = val;
@@ -1095,15 +1095,15 @@ static struct snd_soc_dai_driver wm9713_dai[] = {
 
 int wm9713_reset(struct snd_soc_codec *codec, int try_warm)
 {
-	if (try_warm && soc_ac97_ops.warm_reset) {
-		soc_ac97_ops.warm_reset(codec->ac97);
+	if (try_warm && soc_ac97_ops->warm_reset) {
+		soc_ac97_ops->warm_reset(codec->ac97);
 		if (ac97_read(codec, 0) == wm9713_reg[0])
 			return 1;
 	}
 
-	soc_ac97_ops.reset(codec->ac97);
-	if (soc_ac97_ops.warm_reset)
-		soc_ac97_ops.warm_reset(codec->ac97);
+	soc_ac97_ops->reset(codec->ac97);
+	if (soc_ac97_ops->warm_reset)
+		soc_ac97_ops->warm_reset(codec->ac97);
 	if (ac97_read(codec, 0) != wm9713_reg[0])
 		return -EIO;
 	return 0;
@@ -1180,7 +1180,7 @@ static int wm9713_soc_resume(struct snd_soc_codec *codec)
 			if (i == AC97_POWERDOWN || i == AC97_EXTENDED_MID ||
 				i == AC97_EXTENDED_MSTATUS || i > 0x66)
 				continue;
-			soc_ac97_ops.write(codec->ac97, i, cache[i>>1]);
+			soc_ac97_ops->write(codec->ac97, i, cache[i>>1]);
 		}
 	}
 
@@ -1197,7 +1197,7 @@ static int wm9713_soc_probe(struct snd_soc_codec *codec)
 		return -ENOMEM;
 	snd_soc_codec_set_drvdata(codec, wm9713);
 
-	ret = snd_soc_new_ac97_codec(codec, &soc_ac97_ops, 0);
+	ret = snd_soc_new_ac97_codec(codec, soc_ac97_ops, 0);
 	if (ret < 0)
 		goto codec_err;