From 9fb6198e8c574c6547fbfac0ae1eaf7894ddfdcc Mon Sep 17 00:00:00 2001 From: Jaroslav Kysela Date: Tue, 11 Nov 2008 16:51:02 +0100 Subject: ALSA: add /sys/class/sound/card#/id (r/w) and card#/number (r/o) files For udev, we need a way to rename soundcard names. The soundcard numbers (indexes) are hardwired but we have a text identification which can be changed at run-time. The ALSA user space tools already allow using of this text identification. Signed-off-by: Jaroslav Kysela Signed-off-by: Takashi Iwai --- sound/core/init.c | 66 ++++++++++++++++++++++++++++++++++++++++++++++++++++++- 1 file changed, 65 insertions(+), 1 deletion(-) (limited to 'sound') diff --git a/sound/core/init.c b/sound/core/init.c index b47ff8b..5ff297d 100644 --- a/sound/core/init.c +++ b/sound/core/init.c @@ -533,6 +533,64 @@ 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); + 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 +611,7 @@ 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 +634,12 @@ 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) { + device_create_file(card->card_dev, &card_id_attrs); + device_create_file(card->card_dev, &card_number_attrs); + } +#endif return 0; } -- cgit v1.1 From c2eb9c4ea383aee154e7139395872c4da629e715 Mon Sep 17 00:00:00 2001 From: Jaroslav Kysela Date: Wed, 12 Nov 2008 16:31:37 +0100 Subject: ALSA: when card identification is changed, change also /proc/asound symlink Signed-off-by: Jaroslav Kysela Signed-off-by: Takashi Iwai --- sound/core/info.c | 17 +++++++++++++++++ sound/core/init.c | 1 + 2 files changed, 18 insertions(+) (limited to 'sound') diff --git a/sound/core/info.c b/sound/core/info.c index 527b207..70fa871 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 5ff297d..af1e407 100644 --- a/sound/core/init.c +++ b/sound/core/init.c @@ -571,6 +571,7 @@ card_id_store_attr(struct device *dev, struct device_attribute *attr, goto __exist; } strcpy(card->id, buf1); + snd_info_card_id_change(card); mutex_unlock(&snd_card_mutex); return count; -- cgit v1.1 From 972d4c50fbbb1b9c10293ff90e4e1d45e7fb21ac Mon Sep 17 00:00:00 2001 From: Jaroslav Kysela Date: Wed, 12 Nov 2008 16:37:48 +0100 Subject: ALSA: hdsp/hdspm: remove card->id from rawmidi device name The card->id (card text identification) can be changed at runtime. It might be confusing to have old text identification in device name. Signed-off-by: Jaroslav Kysela Signed-off-by: Takashi Iwai --- sound/pci/rme9652/hdsp.c | 2 +- sound/pci/rme9652/hdspm.c | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) (limited to 'sound') diff --git a/sound/pci/rme9652/hdsp.c b/sound/pci/rme9652/hdsp.c index 736246f..fdd3be5 100644 --- a/sound/pci/rme9652/hdsp.c +++ b/sound/pci/rme9652/hdsp.c @@ -1452,7 +1452,7 @@ static int snd_hdsp_create_midi (struct snd_card *card, struct hdsp *hdsp, int i if (snd_rawmidi_new (card, buf, id, 1, 1, &hdsp->midi[id].rmidi) < 0) return -1; - sprintf (hdsp->midi[id].rmidi->name, "%s MIDI %d", card->id, id+1); + sprintf(hdsp->midi[id].rmidi->name, "HDSP MIDI %d", id+1); hdsp->midi[id].rmidi->private_data = &hdsp->midi[id]; snd_rawmidi_set_ops (hdsp->midi[id].rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT, &snd_hdsp_midi_output); diff --git a/sound/pci/rme9652/hdspm.c b/sound/pci/rme9652/hdspm.c index 98762f9..dc5c4ba 100644 --- a/sound/pci/rme9652/hdspm.c +++ b/sound/pci/rme9652/hdspm.c @@ -1293,7 +1293,7 @@ static int __devinit snd_hdspm_create_midi (struct snd_card *card, if (err < 0) return err; - sprintf (hdspm->midi[id].rmidi->name, "%s MIDI %d", card->id, id+1); + sprintf(hdspm->midi[id].rmidi->name, "HDSPM MIDI %d", id+1); hdspm->midi[id].rmidi->private_data = &hdspm->midi[id]; snd_rawmidi_set_ops(hdspm->midi[id].rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT, -- cgit v1.1 From 2af752936b311a846622668f8b0f1893d8eccade Mon Sep 17 00:00:00 2001 From: Hannes Eder Date: Tue, 18 Nov 2008 12:25:06 -0500 Subject: sound: Fix warnings relating to ignored return value in snd_card_register Do not ignore the return of 'device_create_file' in 'snd_card_register' and thereby fixing the following warnings: sound/core/init.c: In function 'snd_card_register': sound/core/init.c:640: warning: ignoring return value of 'device_create_file', declared with attribute warn_unused_result sound/core/init.c:641: warning: ignoring return value of 'device_create_file', declared with attribute warn_unused_result Signed-off-by: Hannes Eder Signed-off-by: Takashi Iwai --- sound/core/init.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) (limited to 'sound') diff --git a/sound/core/init.c b/sound/core/init.c index af1e407..0d5520c 100644 --- a/sound/core/init.c +++ b/sound/core/init.c @@ -637,8 +637,12 @@ int snd_card_register(struct snd_card *card) #endif #ifndef CONFIG_SYSFS_DEPRECATED if (card->card_dev) { - device_create_file(card->card_dev, &card_id_attrs); - device_create_file(card->card_dev, &card_number_attrs); + 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; -- cgit v1.1