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authorMark Brown <broonie@opensource.wolfsonmicro.com>2008-11-28 13:29:45 +0000
committerMark Brown <broonie@opensource.wolfsonmicro.com>2008-12-09 10:49:26 +0000
commitc5af3a2e192d333997d1e191f3eba7fd2f869681 (patch)
treebd63c16c657b473ea3823faae5644642d9ae88db /sound/soc
parentca4513fe06c483bf0111c990059d42f97288605d (diff)
ASoC: Add card registration API
ASoC v2 allows cards, codecs and platforms to instantiate separately, with the overall ASoC device only being instantiated once all the required components have registered. As part of backporting Liam's work introduce an initial version of the card registration functions. At present these do nothing active and are internal only, they will be exposed to machine drivers after further backporting. Adding this now allows the datastructures used for dynamic card instantiation to be built up gradually. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Diffstat (limited to 'sound/soc')
-rw-r--r--sound/soc/soc-core.c62
1 files changed, 62 insertions, 0 deletions
diff --git a/sound/soc/soc-core.c b/sound/soc/soc-core.c
index 2f2a8d93bbf..44fbd71ce80 100644
--- a/sound/soc/soc-core.c
+++ b/sound/soc/soc-core.c
@@ -43,6 +43,12 @@ static DECLARE_WAIT_QUEUE_HEAD(soc_pm_waitq);
static struct dentry *debugfs_root;
#endif
+static DEFINE_MUTEX(client_mutex);
+static LIST_HEAD(card_list);
+
+static int snd_soc_register_card(struct snd_soc_card *card);
+static int snd_soc_unregister_card(struct snd_soc_card *card);
+
/*
* This is a timeout to do a DAPM powerdown after a stream is closed().
* It can be used to eliminate pops between different playback streams, e.g.
@@ -784,6 +790,14 @@ static int soc_probe(struct platform_device *pdev)
/* Bodge while we push things out of socdev */
card->socdev = socdev;
+ /* Bodge while we unpick instantiation */
+ card->dev = &pdev->dev;
+ ret = snd_soc_register_card(card);
+ if (ret != 0) {
+ dev_err(&pdev->dev, "Failed to register card\n");
+ return ret;
+ }
+
if (card->probe) {
ret = card->probe(pdev);
if (ret < 0)
@@ -863,6 +877,8 @@ static int soc_remove(struct platform_device *pdev)
if (card->remove)
card->remove(pdev);
+ snd_soc_unregister_card(card);
+
return 0;
}
@@ -1957,6 +1973,52 @@ int snd_soc_dai_digital_mute(struct snd_soc_dai *dai, int mute)
}
EXPORT_SYMBOL_GPL(snd_soc_dai_digital_mute);
+/**
+ * snd_soc_register_card - Register a card with the ASoC core
+ *
+ * @param 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)
+{
+ if (!card->name || !card->dev)
+ return -EINVAL;
+
+ INIT_LIST_HEAD(&card->list);
+ card->instantiated = 0;
+
+ mutex_lock(&client_mutex);
+ list_add(&card->list, &card_list);
+ mutex_unlock(&client_mutex);
+
+ dev_dbg(card->dev, "Registered card '%s'\n", card->name);
+
+ return 0;
+}
+
+/**
+ * snd_soc_unregister_card - Unregister a card with the ASoC core
+ *
+ * @param 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)
+{
+ mutex_lock(&client_mutex);
+ list_del(&card->list);
+ mutex_unlock(&client_mutex);
+
+ dev_dbg(card->dev, "Unregistered card '%s'\n", card->name);
+
+ return 0;
+}
+
static int __devinit snd_soc_init(void)
{
#ifdef CONFIG_DEBUG_FS