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authorTakashi Iwai <tiwai@suse.de>2008-12-25 11:40:34 +0100
committerTakashi Iwai <tiwai@suse.de>2008-12-25 11:40:34 +0100
commit5ce442fe2c9423ec5451222aee6f9b2127bb8311 (patch)
tree9cb12cf2c4ab5a8af5de219c22eade3908b5cb59 /sound/core
parent60cda2b53a7826d273198f668cd124f0eeda0e4a (diff)
parent2af752936b311a846622668f8b0f1893d8eccade (diff)
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Merge branch 'topic/udev-id-rename' into to-push
Diffstat (limited to 'sound/core')
-rw-r--r--sound/core/info.c17
-rw-r--r--sound/core/init.c71
2 files changed, 87 insertions, 1 deletions
diff --git a/sound/core/info.c b/sound/core/info.c
index 527b207462b0..70fa87189f36 100644
--- a/sound/core/info.c
+++ b/sound/core/info.c
@@ -653,6 +653,23 @@ int snd_info_card_register(struct snd_card *card)
}
/*
+ * called on card->id change
+ */
+void snd_info_card_id_change(struct snd_card *card)
+{
+ mutex_lock(&info_mutex);
+ if (card->proc_root_link) {
+ snd_remove_proc_entry(snd_proc_root, card->proc_root_link);
+ card->proc_root_link = NULL;
+ }
+ if (strcmp(card->id, card->proc_root->name))
+ card->proc_root_link = proc_symlink(card->id,
+ snd_proc_root,
+ card->proc_root->name);
+ mutex_unlock(&info_mutex);
+}
+
+/*
* de-register the card proc file
* called from init.c
*/
diff --git a/sound/core/init.c b/sound/core/init.c
index b47ff8b44be8..0d5520c415d3 100644
--- a/sound/core/init.c
+++ b/sound/core/init.c
@@ -533,6 +533,65 @@ static void choose_default_id(struct snd_card *card)
}
}
+#ifndef CONFIG_SYSFS_DEPRECATED
+static ssize_t
+card_id_show_attr(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct snd_card *card = dev_get_drvdata(dev);
+ return snprintf(buf, PAGE_SIZE, "%s\n", card ? card->id : "(null)");
+}
+
+static ssize_t
+card_id_store_attr(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct snd_card *card = dev_get_drvdata(dev);
+ char buf1[sizeof(card->id)];
+ size_t copy = count > sizeof(card->id) - 1 ?
+ sizeof(card->id) - 1 : count;
+ size_t idx;
+ int c;
+
+ for (idx = 0; idx < copy; idx++) {
+ c = buf[idx];
+ if (!isalnum(c) && c != '_' && c != '-')
+ return -EINVAL;
+ }
+ memcpy(buf1, buf, copy);
+ buf1[copy] = '\0';
+ mutex_lock(&snd_card_mutex);
+ if (!snd_info_check_reserved_words(buf1)) {
+ __exist:
+ mutex_unlock(&snd_card_mutex);
+ return -EEXIST;
+ }
+ for (idx = 0; idx < snd_ecards_limit; idx++) {
+ if (snd_cards[idx] && !strcmp(snd_cards[idx]->id, buf1))
+ goto __exist;
+ }
+ strcpy(card->id, buf1);
+ snd_info_card_id_change(card);
+ mutex_unlock(&snd_card_mutex);
+
+ return count;
+}
+
+static struct device_attribute card_id_attrs =
+ __ATTR(id, S_IRUGO | S_IWUSR, card_id_show_attr, card_id_store_attr);
+
+static ssize_t
+card_number_show_attr(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct snd_card *card = dev_get_drvdata(dev);
+ return snprintf(buf, PAGE_SIZE, "%i\n", card ? card->number : -1);
+}
+
+static struct device_attribute card_number_attrs =
+ __ATTR(number, S_IRUGO, card_number_show_attr, NULL);
+#endif /* CONFIG_SYSFS_DEPRECATED */
+
/**
* snd_card_register - register the soundcard
* @card: soundcard structure
@@ -553,7 +612,7 @@ int snd_card_register(struct snd_card *card)
#ifndef CONFIG_SYSFS_DEPRECATED
if (!card->card_dev) {
card->card_dev = device_create(sound_class, card->dev,
- MKDEV(0, 0), NULL,
+ MKDEV(0, 0), card,
"card%i", card->number);
if (IS_ERR(card->card_dev))
card->card_dev = NULL;
@@ -576,6 +635,16 @@ int snd_card_register(struct snd_card *card)
if (snd_mixer_oss_notify_callback)
snd_mixer_oss_notify_callback(card, SND_MIXER_OSS_NOTIFY_REGISTER);
#endif
+#ifndef CONFIG_SYSFS_DEPRECATED
+ if (card->card_dev) {
+ err = device_create_file(card->card_dev, &card_id_attrs);
+ if (err < 0)
+ return err;
+ err = device_create_file(card->card_dev, &card_number_attrs);
+ if (err < 0)
+ return err;
+ }
+#endif
return 0;
}