1 files changed, 372 insertions, 176 deletions

diff --git a/sound/soc/soc-core.c b/sound/soc/soc-core.c
index c3f6f1e72790..17efacdb248a 100644
--- a/sound/soc/soc-core.c
+++ b/sound/soc/soc-core.c
@@ -48,7 +48,8 @@ static DEFINE_MUTEX(pcm_mutex);
 static DECLARE_WAIT_QUEUE_HEAD(soc_pm_waitq);
 
 #ifdef CONFIG_DEBUG_FS
-static struct dentry *debugfs_root;
+struct dentry *snd_soc_debugfs_root;
+EXPORT_SYMBOL_GPL(snd_soc_debugfs_root);
 #endif
 
 static DEFINE_MUTEX(client_mutex);
@@ -57,8 +58,6 @@ static LIST_HEAD(dai_list);
 static LIST_HEAD(platform_list);
 static LIST_HEAD(codec_list);
 
-static int snd_soc_register_card(struct snd_soc_card *card);
-static int snd_soc_unregister_card(struct snd_soc_card *card);
 static int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num);
 
 /*
@@ -70,10 +69,73 @@ static int pmdown_time = 5000;
 module_param(pmdown_time, int, 0);
 MODULE_PARM_DESC(pmdown_time, "DAPM stream powerdown time (msecs)");
 
+/* returns the minimum number of bytes needed to represent
+ * a particular given value */
+static int min_bytes_needed(unsigned long val)
+{
+	int c = 0;
+	int i;
+
+	for (i = (sizeof val * 8) - 1; i >= 0; --i, ++c)
+		if (val & (1UL << i))
+			break;
+	c = (sizeof val * 8) - c;
+	if (!c || (c % 8))
+		c = (c + 8) / 8;
+	else
+		c /= 8;
+	return c;
+}
+
+/* fill buf which is 'len' bytes with a formatted
+ * string of the form 'reg: value\n' */
+static int format_register_str(struct snd_soc_codec *codec,
+			       unsigned int reg, char *buf, size_t len)
+{
+	int wordsize = codec->driver->reg_word_size * 2;
+	int regsize = min_bytes_needed(codec->driver->reg_cache_size) * 2;
+	int ret;
+	char tmpbuf[len + 1];
+	char regbuf[regsize + 1];
+
+	/* since tmpbuf is allocated on the stack, warn the callers if they
+	 * try to abuse this function */
+	WARN_ON(len > 63);
+
+	/* +2 for ': ' and + 1 for '\n' */
+	if (wordsize + regsize + 2 + 1 != len)
+		return -EINVAL;
+
+	ret = snd_soc_read(codec , reg);
+	if (ret < 0) {
+		memset(regbuf, 'X', regsize);
+		regbuf[regsize] = '\0';
+	} else {
+		snprintf(regbuf, regsize + 1, "%.*x", regsize, ret);
+	}
+
+	/* prepare the buffer */
+	snprintf(tmpbuf, len + 1, "%.*x: %s\n", wordsize, reg, regbuf);
+	/* copy it back to the caller without the '\0' */
+	memcpy(buf, tmpbuf, len);
+
+	return 0;
+}
+
 /* codec register dump */
-static ssize_t soc_codec_reg_show(struct snd_soc_codec *codec, char *buf)
+static ssize_t soc_codec_reg_show(struct snd_soc_codec *codec, char *buf,
+				  size_t count, loff_t pos)
 {
-	int ret, i, step = 1, count = 0;
+	int i, step = 1;
+	int wordsize, regsize;
+	int len;
+	size_t total = 0;
+	loff_t p = 0;
+
+	wordsize = codec->driver->reg_word_size * 2;
+	regsize = min_bytes_needed(codec->driver->reg_cache_size) * 2;
+
+	len = wordsize + regsize + 2 + 1;
 
 	if (!codec->driver->reg_cache_size)
 		return 0;
@@ -81,55 +143,37 @@ static ssize_t soc_codec_reg_show(struct snd_soc_codec *codec, char *buf)
 	if (codec->driver->reg_cache_step)
 		step = codec->driver->reg_cache_step;
 
-	count += sprintf(buf, "%s registers\n", codec->name);
 	for (i = 0; i < codec->driver->reg_cache_size; i += step) {
-		if (codec->driver->readable_register && !codec->driver->readable_register(i))
+		if (codec->readable_register && !codec->readable_register(codec, i))
 			continue;
-
-		count += sprintf(buf + count, "%2x: ", i);
-		if (count >= PAGE_SIZE - 1)
-			break;
-
 		if (codec->driver->display_register) {
 			count += codec->driver->display_register(codec, buf + count,
 							 PAGE_SIZE - count, i);
 		} else {
-			/* If the read fails it's almost certainly due to
-			 * the register being volatile and the device being
-			 * powered off.
-			 */
-			ret = snd_soc_read(codec, i);
-			if (ret >= 0)
-				count += snprintf(buf + count,
-						  PAGE_SIZE - count,
-						  "%4x", ret);
-			else
-				count += snprintf(buf + count,
-						  PAGE_SIZE - count,
-						  "<no data: %d>", ret);
+			/* only support larger than PAGE_SIZE bytes debugfs
+			 * entries for the default case */
+			if (p >= pos) {
+				if (total + len >= count - 1)
+					break;
+				format_register_str(codec, i, buf + total, len);
+				total += len;
+			}
+			p += len;
 		}
-
-		if (count >= PAGE_SIZE - 1)
-			break;
-
-		count += snprintf(buf + count, PAGE_SIZE - count, "\n");
-		if (count >= PAGE_SIZE - 1)
-			break;
 	}
 
-	/* Truncate count; min() would cause a warning */
-	if (count >= PAGE_SIZE)
-		count = PAGE_SIZE - 1;
+	total = min(total, count - 1);
 
-	return count;
+	return total;
 }
+
 static ssize_t codec_reg_show(struct device *dev,
 	struct device_attribute *attr, char *buf)
 {
 	struct snd_soc_pcm_runtime *rtd =
 			container_of(dev, struct snd_soc_pcm_runtime, dev);
 
-	return soc_codec_reg_show(rtd->codec, buf);
+	return soc_codec_reg_show(rtd->codec, buf, PAGE_SIZE, 0);
 }
 
 static DEVICE_ATTR(codec_reg, 0444, codec_reg_show, NULL);
@@ -168,16 +212,28 @@ static int codec_reg_open_file(struct inode *inode, struct file *file)
 }
 
 static ssize_t codec_reg_read_file(struct file *file, char __user *user_buf,
-			       size_t count, loff_t *ppos)
+				   size_t count, loff_t *ppos)
 {
 	ssize_t ret;
 	struct snd_soc_codec *codec = file->private_data;
-	char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
+	char *buf;
+
+	if (*ppos < 0 || !count)
+		return -EINVAL;
+
+	buf = kmalloc(count, GFP_KERNEL);
 	if (!buf)
 		return -ENOMEM;
-	ret = soc_codec_reg_show(codec, buf);
-	if (ret >= 0)
-		ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
+
+	ret = soc_codec_reg_show(codec, buf, count, *ppos);
+	if (ret >= 0) {
+		if (copy_to_user(user_buf, buf, ret)) {
+			kfree(buf);
+			return -EFAULT;
+		}
+		*ppos += ret;
+	}
+
 	kfree(buf);
 	return ret;
 }
@@ -209,6 +265,10 @@ static ssize_t codec_reg_write_file(struct file *file,
 		start++;
 	if (strict_strtoul(start, 16, &value))
 		return -EINVAL;
+
+	/* Userspace has been fiddling around behind the kernel's back */
+	add_taint(TAINT_USER);
+
 	snd_soc_write(codec, reg, value);
 	return buf_size;
 }
@@ -232,6 +292,11 @@ static void soc_init_codec_debugfs(struct snd_soc_codec *codec)
 		return;
 	}
 
+	debugfs_create_bool("cache_sync", 0444, codec->debugfs_codec_root,
+			    &codec->cache_sync);
+	debugfs_create_bool("cache_only", 0444, codec->debugfs_codec_root,
+			    &codec->cache_only);
+
 	codec->debugfs_reg = debugfs_create_file("codec_reg", 0644,
 						 codec->debugfs_codec_root,
 						 codec, &codec_reg_fops);
@@ -356,7 +421,7 @@ static const struct file_operations platform_list_fops = {
 static void soc_init_card_debugfs(struct snd_soc_card *card)
 {
 	card->debugfs_card_root = debugfs_create_dir(card->name,
-						     debugfs_root);
+						     snd_soc_debugfs_root);
 	if (!card->debugfs_card_root) {
 		dev_warn(card->dev,
 			 "ASoC: Failed to create codec debugfs directory\n");
@@ -435,20 +500,30 @@ static int soc_pcm_apply_symmetry(struct snd_pcm_substream *substream)
 	struct snd_soc_dai *codec_dai = rtd->codec_dai;
 	int ret;
 
-	if (codec_dai->driver->symmetric_rates || cpu_dai->driver->symmetric_rates ||
-			rtd->dai_link->symmetric_rates) {
-		dev_dbg(&rtd->dev, "Symmetry forces %dHz rate\n",
-				rtd->rate);
+	if (!codec_dai->driver->symmetric_rates &&
+	    !cpu_dai->driver->symmetric_rates &&
+	    !rtd->dai_link->symmetric_rates)
+		return 0;
 
-		ret = snd_pcm_hw_constraint_minmax(substream->runtime,
-						   SNDRV_PCM_HW_PARAM_RATE,
-						   rtd->rate,
-						   rtd->rate);
-		if (ret < 0) {
-			dev_err(&rtd->dev,
-				"Unable to apply rate symmetry constraint: %d\n", ret);
-			return ret;
-		}
+	/* This can happen if multiple streams are starting simultaneously -
+	 * the second can need to get its constraints before the first has
+	 * picked a rate.  Complain and allow the application to carry on.
+	 */
+	if (!rtd->rate) {
+		dev_warn(&rtd->dev,
+			 "Not enforcing symmetric_rates due to race\n");
+		return 0;
+	}
+
+	dev_dbg(&rtd->dev, "Symmetry forces %dHz rate\n", rtd->rate);
+
+	ret = snd_pcm_hw_constraint_minmax(substream->runtime,
+					   SNDRV_PCM_HW_PARAM_RATE,
+					   rtd->rate, rtd->rate);
+	if (ret < 0) {
+		dev_err(&rtd->dev,
+			"Unable to apply rate symmetry constraint: %d\n", ret);
+		return ret;
 	}
 
 	return 0;
@@ -962,12 +1037,11 @@ static struct snd_pcm_ops soc_pcm_ops = {
 	.pointer	= soc_pcm_pointer,
 };
 
-#ifdef CONFIG_PM
+#ifdef CONFIG_PM_SLEEP
 /* powers down audio subsystem for suspend */
-static int soc_suspend(struct device *dev)
+int snd_soc_suspend(struct device *dev)
 {
-	struct platform_device *pdev = to_platform_device(dev);
-	struct snd_soc_card *card = platform_get_drvdata(pdev);
+	struct snd_soc_card *card = dev_get_drvdata(dev);
 	struct snd_soc_codec *codec;
 	int i;
 
@@ -1008,7 +1082,7 @@ static int soc_suspend(struct device *dev)
 	}
 
 	if (card->suspend_pre)
-		card->suspend_pre(pdev, PMSG_SUSPEND);
+		card->suspend_pre(card);
 
 	for (i = 0; i < card->num_rtd; i++) {
 		struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
@@ -1075,10 +1149,11 @@ static int soc_suspend(struct device *dev)
 	}
 
 	if (card->suspend_post)
-		card->suspend_post(pdev, PMSG_SUSPEND);
+		card->suspend_post(card);
 
 	return 0;
 }
+EXPORT_SYMBOL_GPL(snd_soc_suspend);
 
 /* deferred resume work, so resume can complete before we finished
  * setting our codec back up, which can be very slow on I2C
@@ -1087,7 +1162,6 @@ static void soc_resume_deferred(struct work_struct *work)
 {
 	struct snd_soc_card *card =
 			container_of(work, struct snd_soc_card, deferred_resume_work);
-	struct platform_device *pdev = to_platform_device(card->dev);
 	struct snd_soc_codec *codec;
 	int i;
 
@@ -1101,7 +1175,7 @@ static void soc_resume_deferred(struct work_struct *work)
 	snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D2);
 
 	if (card->resume_pre)
-		card->resume_pre(pdev);
+		card->resume_pre(card);
 
 	/* resume AC97 DAIs */
 	for (i = 0; i < card->num_rtd; i++) {
@@ -1176,7 +1250,7 @@ static void soc_resume_deferred(struct work_struct *work)
 	}
 
 	if (card->resume_post)
-		card->resume_post(pdev);
+		card->resume_post(card);
 
 	dev_dbg(card->dev, "resume work completed\n");
 
@@ -1185,10 +1259,9 @@ static void soc_resume_deferred(struct work_struct *work)
 }
 
 /* powers up audio subsystem after a suspend */
-static int soc_resume(struct device *dev)
+int snd_soc_resume(struct device *dev)
 {
-	struct platform_device *pdev = to_platform_device(dev);
-	struct snd_soc_card *card = platform_get_drvdata(pdev);
+	struct snd_soc_card *card = dev_get_drvdata(dev);
 	int i;
 
 	/* AC97 devices might have other drivers hanging off them so
@@ -1210,9 +1283,10 @@ static int soc_resume(struct device *dev)
 
 	return 0;
 }
+EXPORT_SYMBOL_GPL(snd_soc_resume);
 #else
-#define soc_suspend	NULL
-#define soc_resume	NULL
+#define snd_soc_suspend NULL
+#define snd_soc_resume NULL
 #endif
 
 static struct snd_soc_dai_ops null_dai_ops = {
@@ -1400,31 +1474,44 @@ static int soc_probe_codec(struct snd_soc_card *card,
 			   struct snd_soc_codec *codec)
 {
 	int ret = 0;
+	const struct snd_soc_codec_driver *driver = codec->driver;
 
 	codec->card = card;
 	codec->dapm.card = card;
 	soc_set_name_prefix(card, codec);
 
-	if (codec->driver->probe) {
-		ret = codec->driver->probe(codec);
+	if (!try_module_get(codec->dev->driver->owner))
+		return -ENODEV;
+
+	if (driver->probe) {
+		ret = driver->probe(codec);
 		if (ret < 0) {
 			dev_err(codec->dev,
 				"asoc: failed to probe CODEC %s: %d\n",
 				codec->name, ret);
-			return ret;
+			goto err_probe;
 		}
 	}
 
+	if (driver->dapm_widgets)
+		snd_soc_dapm_new_controls(&codec->dapm, driver->dapm_widgets,
+					  driver->num_dapm_widgets);
+	if (driver->dapm_routes)
+		snd_soc_dapm_add_routes(&codec->dapm, driver->dapm_routes,
+					driver->num_dapm_routes);
+
 	soc_init_codec_debugfs(codec);
 
 	/* mark codec as probed and add to card codec list */
-	if (!try_module_get(codec->dev->driver->owner))
-		return -ENODEV;
-
 	codec->probed = 1;
 	list_add(&codec->card_list, &card->codec_dev_list);
 	list_add(&codec->dapm.list, &card->dapm_list);
 
+	return 0;
+
+err_probe:
+	module_put(codec->dev->driver->owner);
+
 	return ret;
 }
 
@@ -1468,7 +1555,6 @@ static int soc_post_component_init(struct snd_soc_card *card,
 
 	/* Make sure all DAPM widgets are instantiated */
 	snd_soc_dapm_new_widgets(&codec->dapm);
-	snd_soc_dapm_sync(&codec->dapm);
 
 	/* register the rtd device */
 	rtd->codec = codec;
@@ -1543,19 +1629,19 @@ static int soc_probe_dai_link(struct snd_soc_card *card, int num)
 
 	/* probe the platform */
 	if (!platform->probed) {
+		if (!try_module_get(platform->dev->driver->owner))
+			return -ENODEV;
+
 		if (platform->driver->probe) {
 			ret = platform->driver->probe(platform);
 			if (ret < 0) {
 				printk(KERN_ERR "asoc: failed to probe platform %s\n",
 						platform->name);
+				module_put(platform->dev->driver->owner);
 				return ret;
 			}
 		}
 		/* mark platform as probed and add to card platform list */
-
-		if (!try_module_get(platform->dev->driver->owner))
-			return -ENODEV;
-
 		platform->probed = 1;
 		list_add(&platform->card_list, &card->platform_dev_list);
 	}
@@ -1713,7 +1799,6 @@ static int snd_soc_init_codec_cache(struct snd_soc_codec *codec,
 
 static void snd_soc_instantiate_card(struct snd_soc_card *card)
 {
-	struct platform_device *pdev = to_platform_device(card->dev);
 	struct snd_soc_codec *codec;
 	struct snd_soc_codec_conf *codec_conf;
 	enum snd_soc_compress_type compress_type;
@@ -1740,6 +1825,8 @@ static void snd_soc_instantiate_card(struct snd_soc_card *card)
 	list_for_each_entry(codec, &codec_list, list) {
 		if (codec->cache_init)
 			continue;
+		/* by default we don't override the compress_type */
+		compress_type = 0;
 		/* check to see if we need to override the compress_type */
 		for (i = 0; i < card->num_configs; ++i) {
 			codec_conf = &card->codec_conf[i];
@@ -1750,18 +1837,6 @@ static void snd_soc_instantiate_card(struct snd_soc_card *card)
 					break;
 			}
 		}
-		if (i == card->num_configs) {
-			/* no need to override the compress_type so
-			 * go ahead and do the standard thing */
-			ret = snd_soc_init_codec_cache(codec, 0);
-			if (ret < 0) {
-				mutex_unlock(&card->mutex);
-				return;
-			}
-			continue;
-		}
-		/* override the compress_type with the one supplied in
-		 * the machine driver */
 		ret = snd_soc_init_codec_cache(codec, compress_type);
 		if (ret < 0) {
 			mutex_unlock(&card->mutex);
@@ -1780,14 +1855,19 @@ static void snd_soc_instantiate_card(struct snd_soc_card *card)
 	}
 	card->snd_card->dev = card->dev;
 
-#ifdef CONFIG_PM
+	card->dapm.bias_level = SND_SOC_BIAS_OFF;
+	card->dapm.dev = card->dev;
+	card->dapm.card = card;
+	list_add(&card->dapm.list, &card->dapm_list);
+
+#ifdef CONFIG_PM_SLEEP
 	/* deferred resume work */
 	INIT_WORK(&card->deferred_resume_work, soc_resume_deferred);
 #endif
 
 	/* initialise the sound card only once */
 	if (card->probe) {
-		ret = card->probe(pdev);
+		ret = card->probe(card);
 		if (ret < 0)
 			goto card_probe_error;
 	}
@@ -1810,11 +1890,37 @@ static void snd_soc_instantiate_card(struct snd_soc_card *card)
 		}
 	}
 
+	if (card->dapm_widgets)
+		snd_soc_dapm_new_controls(&card->dapm, card->dapm_widgets,
+					  card->num_dapm_widgets);
+	if (card->dapm_routes)
+		snd_soc_dapm_add_routes(&card->dapm, card->dapm_routes,
+					card->num_dapm_routes);
+
+#ifdef CONFIG_DEBUG_FS
+	card->dapm.debugfs_dapm = debugfs_create_dir("dapm",
+						     card->debugfs_card_root);
+	if (!card->dapm.debugfs_dapm)
+		printk(KERN_WARNING
+		       "Failed to create card DAPM debugfs directory\n");
+
+	snd_soc_dapm_debugfs_init(&card->dapm);
+#endif
+
 	snprintf(card->snd_card->shortname, sizeof(card->snd_card->shortname),
 		 "%s",  card->name);
 	snprintf(card->snd_card->longname, sizeof(card->snd_card->longname),
 		 "%s", card->name);
 
+	if (card->late_probe) {
+		ret = card->late_probe(card);
+		if (ret < 0) {
+			dev_err(card->dev, "%s late_probe() failed: %d\n",
+				card->name, ret);
+			goto probe_aux_dev_err;
+		}
+	}
+
 	ret = snd_card_register(card->snd_card);
 	if (ret < 0) {
 		printk(KERN_ERR "asoc: failed to register soundcard for %s\n", card->name);
@@ -1848,7 +1954,7 @@ probe_dai_err:
 
 card_probe_error:
 	if (card->remove)
-		card->remove(pdev);
+		card->remove(card);
 
 	snd_card_free(card->snd_card);
 
@@ -1872,16 +1978,15 @@ static int soc_probe(struct platform_device *pdev)
 	struct snd_soc_card *card = platform_get_drvdata(pdev);
 	int ret = 0;
 
+	/*
+	 * no card, so machine driver should be registering card
+	 * we should not be here in that case so ret error
+	 */
+	if (!card)
+		return -EINVAL;
+
 	/* Bodge while we unpick instantiation */
 	card->dev = &pdev->dev;
-	INIT_LIST_HEAD(&card->dai_dev_list);
-	INIT_LIST_HEAD(&card->codec_dev_list);
-	INIT_LIST_HEAD(&card->platform_dev_list);
-	INIT_LIST_HEAD(&card->widgets);
-	INIT_LIST_HEAD(&card->paths);
-	INIT_LIST_HEAD(&card->dapm_list);
-
-	soc_init_card_debugfs(card);
 
 	ret = snd_soc_register_card(card);
 	if (ret != 0) {
@@ -1892,45 +1997,48 @@ static int soc_probe(struct platform_device *pdev)
 	return 0;
 }
 
-/* removes a socdev */
-static int soc_remove(struct platform_device *pdev)
+static int soc_cleanup_card_resources(struct snd_soc_card *card)
 {
-	struct snd_soc_card *card = platform_get_drvdata(pdev);
 	int i;
 
-		if (card->instantiated) {
+	/* make sure any delayed work runs */
+	for (i = 0; i < card->num_rtd; i++) {
+		struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
+		flush_delayed_work_sync(&rtd->delayed_work);
+	}
 
-		/* make sure any delayed work runs */
-		for (i = 0; i < card->num_rtd; i++) {
-			struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
-			flush_delayed_work_sync(&rtd->delayed_work);
-		}
+	/* remove auxiliary devices */
+	for (i = 0; i < card->num_aux_devs; i++)
+		soc_remove_aux_dev(card, i);
 
-		/* remove auxiliary devices */
-		for (i = 0; i < card->num_aux_devs; i++)
-			soc_remove_aux_dev(card, i);
+	/* remove and free each DAI */
+	for (i = 0; i < card->num_rtd; i++)
+		soc_remove_dai_link(card, i);
 
-		/* remove and free each DAI */
-		for (i = 0; i < card->num_rtd; i++)
-			soc_remove_dai_link(card, i);
+	soc_cleanup_card_debugfs(card);
 
-		soc_cleanup_card_debugfs(card);
+	/* remove the card */
+	if (card->remove)
+		card->remove(card);
+
+	kfree(card->rtd);
+	snd_card_free(card->snd_card);
+	return 0;
 
-		/* remove the card */
-		if (card->remove)
-			card->remove(pdev);
+}
+
+/* removes a socdev */
+static int soc_remove(struct platform_device *pdev)
+{
+	struct snd_soc_card *card = platform_get_drvdata(pdev);
 
-		kfree(card->rtd);
-		snd_card_free(card->snd_card);
-	}
 	snd_soc_unregister_card(card);
 	return 0;
 }
 
-static int soc_poweroff(struct device *dev)
+int snd_soc_poweroff(struct device *dev)
 {
-	struct platform_device *pdev = to_platform_device(dev);
-	struct snd_soc_card *card = platform_get_drvdata(pdev);
+	struct snd_soc_card *card = dev_get_drvdata(dev);
 	int i;
 
 	if (!card->instantiated)
@@ -1947,11 +2055,12 @@ static int soc_poweroff(struct device *dev)
 
 	return 0;
 }
+EXPORT_SYMBOL_GPL(snd_soc_poweroff);
 
-static const struct dev_pm_ops soc_pm_ops = {
-	.suspend = soc_suspend,
-	.resume = soc_resume,
-	.poweroff = soc_poweroff,
+const struct dev_pm_ops snd_soc_pm_ops = {
+	.suspend = snd_soc_suspend,
+	.resume = snd_soc_resume,
+	.poweroff = snd_soc_poweroff,
 };
 
 /* ASoC platform driver */
@@ -1959,7 +2068,7 @@ static struct platform_driver soc_driver = {
 	.driver		= {
 		.name		= "soc-audio",
 		.owner		= THIS_MODULE,
-		.pm		= &soc_pm_ops,
+		.pm		= &snd_soc_pm_ops,
 	},
 	.probe		= soc_probe,
 	.remove		= soc_remove,
@@ -2029,10 +2138,11 @@ static int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num)
  *
  * Boolean function indiciating if a CODEC register is volatile.
  */
-int snd_soc_codec_volatile_register(struct snd_soc_codec *codec, int reg)
+int snd_soc_codec_volatile_register(struct snd_soc_codec *codec,
+				    unsigned int reg)
 {
-	if (codec->driver->volatile_register)
-		return codec->driver->volatile_register(reg);
+	if (codec->volatile_register)
+		return codec->volatile_register(codec, reg);
 	else
 		return 0;
 }
@@ -2129,19 +2239,27 @@ EXPORT_SYMBOL_GPL(snd_soc_write);
  *
  * Writes new register value.
  *
- * Returns 1 for change else 0.
+ * Returns 1 for change, 0 for no change, or negative error code.
  */
 int snd_soc_update_bits(struct snd_soc_codec *codec, unsigned short reg,
 				unsigned int mask, unsigned int value)
 {
 	int change;
 	unsigned int old, new;
+	int ret;
 
-	old = snd_soc_read(codec, reg);
+	ret = snd_soc_read(codec, reg);
+	if (ret < 0)
+		return ret;
+
+	old = ret;
 	new = (old & ~mask) | value;
 	change = old != new;
-	if (change)
-		snd_soc_write(codec, reg, new);
+	if (change) {
+		ret = snd_soc_write(codec, reg, new);
+		if (ret < 0)
+			return ret;
+	}
 
 	return change;
 }
@@ -2226,22 +2344,45 @@ EXPORT_SYMBOL_GPL(snd_soc_set_runtime_hwparams);
  * @_template: control template
  * @data: control private data
  * @long_name: control long name
+ * @prefix: control name prefix
  *
  * Create a new mixer control from a template control.
  *
  * Returns 0 for success, else error.
  */
 struct snd_kcontrol *snd_soc_cnew(const struct snd_kcontrol_new *_template,
-	void *data, char *long_name)
+				  void *data, char *long_name,
+				  const char *prefix)
 {
 	struct snd_kcontrol_new template;
+	struct snd_kcontrol *kcontrol;
+	char *name = NULL;
+	int name_len;
 
 	memcpy(&template, _template, sizeof(template));
-	if (long_name)
-		template.name = long_name;
 	template.index = 0;
 
-	return snd_ctl_new1(&template, data);
+	if (!long_name)
+		long_name = template.name;
+
+	if (prefix) {
+		name_len = strlen(long_name) + strlen(prefix) + 2;
+		name = kmalloc(name_len, GFP_ATOMIC);
+		if (!name)
+			return NULL;
+
+		snprintf(name, name_len, "%s %s", prefix, long_name);
+
+		template.name = name;
+	} else {
+		template.name = long_name;
+	}
+
+	kcontrol = snd_ctl_new1(&template, data);
+
+	kfree(name);
+
+	return kcontrol;
 }
 EXPORT_SYMBOL_GPL(snd_soc_cnew);
 
@@ -2260,22 +2401,16 @@ int snd_soc_add_controls(struct snd_soc_codec *codec,
 	const struct snd_kcontrol_new *controls, int num_controls)
 {
 	struct snd_card *card = codec->card->snd_card;
-	char prefixed_name[44], *name;
 	int err, i;
 
 	for (i = 0; i < num_controls; i++) {
 		const struct snd_kcontrol_new *control = &controls[i];
-		if (codec->name_prefix) {
-			snprintf(prefixed_name, sizeof(prefixed_name), "%s %s",
-				 codec->name_prefix, control->name);
-			name = prefixed_name;
-		} else {
-			name = control->name;
-		}
-		err = snd_ctl_add(card, snd_soc_cnew(control, codec, name));
+		err = snd_ctl_add(card, snd_soc_cnew(control, codec,
+						     control->name,
+						     codec->name_prefix));
 		if (err < 0) {
 			dev_err(codec->dev, "%s: Failed to add %s: %d\n",
-				codec->name, name, err);
+				codec->name, control->name, err);
 			return err;
 		}
 	}
@@ -2956,12 +3091,34 @@ int snd_soc_dai_set_sysclk(struct snd_soc_dai *dai, int clk_id,
 {
 	if (dai->driver && dai->driver->ops->set_sysclk)
 		return dai->driver->ops->set_sysclk(dai, clk_id, freq, dir);
+	else if (dai->codec && dai->codec->driver->set_sysclk)
+		return dai->codec->driver->set_sysclk(dai->codec, clk_id,
+						      freq, dir);
 	else
 		return -EINVAL;
 }
 EXPORT_SYMBOL_GPL(snd_soc_dai_set_sysclk);
 
 /**
+ * snd_soc_codec_set_sysclk - configure CODEC system or master clock.
+ * @codec: CODEC
+ * @clk_id: DAI specific clock ID
+ * @freq: new clock frequency in Hz
+ * @dir: new clock direction - input/output.
+ *
+ * Configures the CODEC master (MCLK) or system (SYSCLK) clocking.
+ */
+int snd_soc_codec_set_sysclk(struct snd_soc_codec *codec, int clk_id,
+	unsigned int freq, int dir)
+{
+	if (codec->driver->set_sysclk)
+		return codec->driver->set_sysclk(codec, clk_id, freq, dir);
+	else
+		return -EINVAL;
+}
+EXPORT_SYMBOL_GPL(snd_soc_codec_set_sysclk);
+
+/**
  * snd_soc_dai_set_clkdiv - configure DAI clock dividers.
  * @dai: DAI
  * @div_id: DAI specific clock divider ID
@@ -2997,11 +3154,35 @@ int snd_soc_dai_set_pll(struct snd_soc_dai *dai, int pll_id, int source,
 	if (dai->driver && dai->driver->ops->set_pll)
 		return dai->driver->ops->set_pll(dai, pll_id, source,
 					 freq_in, freq_out);
+	else if (dai->codec && dai->codec->driver->set_pll)
+		return dai->codec->driver->set_pll(dai->codec, pll_id, source,
+						   freq_in, freq_out);
 	else
 		return -EINVAL;
 }
 EXPORT_SYMBOL_GPL(snd_soc_dai_set_pll);
 
+/*
+ * snd_soc_codec_set_pll - configure codec PLL.
+ * @codec: CODEC
+ * @pll_id: DAI specific PLL ID
+ * @source: DAI specific source for the PLL
+ * @freq_in: PLL input clock frequency in Hz
+ * @freq_out: requested PLL output clock frequency in Hz
+ *
+ * Configures and enables PLL to generate output clock based on input clock.
+ */
+int snd_soc_codec_set_pll(struct snd_soc_codec *codec, int pll_id, int source,
+			  unsigned int freq_in, unsigned int freq_out)
+{
+	if (codec->driver->set_pll)
+		return codec->driver->set_pll(codec, pll_id, source,
+					      freq_in, freq_out);
+	else
+		return -EINVAL;
+}
+EXPORT_SYMBOL_GPL(snd_soc_codec_set_pll);
+
 /**
  * snd_soc_dai_set_fmt - configure DAI hardware audio format.
  * @dai: DAI
@@ -3101,17 +3282,18 @@ EXPORT_SYMBOL_GPL(snd_soc_dai_digital_mute);
  *
  * @card: Card to register
  *
- * Note that currently this is an internal only function: it will be
- * exposed to machine drivers after further backporting of ASoC v2
- * registration APIs.
  */
-static int snd_soc_register_card(struct snd_soc_card *card)
+int snd_soc_register_card(struct snd_soc_card *card)
 {
 	int i;
 
 	if (!card->name || !card->dev)
 		return -EINVAL;
 
+	snd_soc_initialize_card_lists(card);
+
+	soc_init_card_debugfs(card);
+
 	card->rtd = kzalloc(sizeof(struct snd_soc_pcm_runtime) *
 			    (card->num_links + card->num_aux_devs),
 			    GFP_KERNEL);
@@ -3135,18 +3317,18 @@ static int snd_soc_register_card(struct snd_soc_card *card)
 
 	return 0;
 }
+EXPORT_SYMBOL_GPL(snd_soc_register_card);
 
 /**
  * snd_soc_unregister_card - Unregister a card with the ASoC core
  *
  * @card: Card to unregister
  *
- * Note that currently this is an internal only function: it will be
- * exposed to machine drivers after further backporting of ASoC v2
- * registration APIs.
  */
-static int snd_soc_unregister_card(struct snd_soc_card *card)
+int snd_soc_unregister_card(struct snd_soc_card *card)
 {
+	if (card->instantiated)
+		soc_cleanup_card_resources(card);
 	mutex_lock(&client_mutex);
 	list_del(&card->list);
 	mutex_unlock(&client_mutex);
@@ -3154,6 +3336,7 @@ static int snd_soc_unregister_card(struct snd_soc_card *card)
 
 	return 0;
 }
+EXPORT_SYMBOL_GPL(snd_soc_unregister_card);
 
 /*
  * Simplify DAI link configuration by removing ".-1" from device names
@@ -3483,9 +3666,12 @@ int snd_soc_register_codec(struct device *dev,
 
 	codec->write = codec_drv->write;
 	codec->read = codec_drv->read;
+	codec->volatile_register = codec_drv->volatile_register;
+	codec->readable_register = codec_drv->readable_register;
 	codec->dapm.bias_level = SND_SOC_BIAS_OFF;
 	codec->dapm.dev = dev;
 	codec->dapm.codec = codec;
+	codec->dapm.seq_notifier = codec_drv->seq_notifier;
 	codec->dev = dev;
 	codec->driver = codec_drv;
 	codec->num_dai = num_dai;
@@ -3494,20 +3680,30 @@ int snd_soc_register_codec(struct device *dev,
 	/* allocate CODEC register cache */
 	if (codec_drv->reg_cache_size && codec_drv->reg_word_size) {
 		reg_size = codec_drv->reg_cache_size * codec_drv->reg_word_size;
+		codec->reg_size = reg_size;
 		/* it is necessary to make a copy of the default register cache
 		 * because in the case of using a compression type that requires
 		 * the default register cache to be marked as __devinitconst the
 		 * kernel might have freed the array by the time we initialize
 		 * the cache.
 		 */
-		codec->reg_def_copy = kmemdup(codec_drv->reg_cache_default,
-					      reg_size, GFP_KERNEL);
-		if (!codec->reg_def_copy) {
-			ret = -ENOMEM;
-			goto fail;
+		if (codec_drv->reg_cache_default) {
+			codec->reg_def_copy = kmemdup(codec_drv->reg_cache_default,
+						      reg_size, GFP_KERNEL);
+			if (!codec->reg_def_copy) {
+				ret = -ENOMEM;
+				goto fail;
+			}
 		}
 	}
 
+	if (codec_drv->reg_access_size && codec_drv->reg_access_default) {
+		if (!codec->volatile_register)
+			codec->volatile_register = snd_soc_default_volatile_register;
+		if (!codec->readable_register)
+			codec->readable_register = snd_soc_default_readable_register;
+	}
+
 	for (i = 0; i < num_dai; i++) {
 		fixup_codec_formats(&dai_drv[i].playback);
 		fixup_codec_formats(&dai_drv[i].capture);
@@ -3574,22 +3770,22 @@ EXPORT_SYMBOL_GPL(snd_soc_unregister_codec);
 static int __init snd_soc_init(void)
 {
 #ifdef CONFIG_DEBUG_FS
-	debugfs_root = debugfs_create_dir("asoc", NULL);
-	if (IS_ERR(debugfs_root) || !debugfs_root) {
+	snd_soc_debugfs_root = debugfs_create_dir("asoc", NULL);
+	if (IS_ERR(snd_soc_debugfs_root) || !snd_soc_debugfs_root) {
 		printk(KERN_WARNING
 		       "ASoC: Failed to create debugfs directory\n");
-		debugfs_root = NULL;
+		snd_soc_debugfs_root = NULL;
 	}
 
-	if (!debugfs_create_file("codecs", 0444, debugfs_root, NULL,
+	if (!debugfs_create_file("codecs", 0444, snd_soc_debugfs_root, NULL,
 				 &codec_list_fops))
 		pr_warn("ASoC: Failed to create CODEC list debugfs file\n");
 
-	if (!debugfs_create_file("dais", 0444, debugfs_root, NULL,
+	if (!debugfs_create_file("dais", 0444, snd_soc_debugfs_root, NULL,
 				 &dai_list_fops))
 		pr_warn("ASoC: Failed to create DAI list debugfs file\n");
 
-	if (!debugfs_create_file("platforms", 0444, debugfs_root, NULL,
+	if (!debugfs_create_file("platforms", 0444, snd_soc_debugfs_root, NULL,
 				 &platform_list_fops))
 		pr_warn("ASoC: Failed to create platform list debugfs file\n");
 #endif
@@ -3601,7 +3797,7 @@ module_init(snd_soc_init);
 static void __exit snd_soc_exit(void)
 {
 #ifdef CONFIG_DEBUG_FS
-	debugfs_remove_recursive(debugfs_root);
+	debugfs_remove_recursive(snd_soc_debugfs_root);
 #endif
 	platform_driver_unregister(&soc_driver);
 }