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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
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ALSA: firewire-motu: add hwdep interface
This commit adds hwdep interface so as the other sound drivers for units on IEEE 1394 bus have. This interface is designed for mixer/control applications. By using this interface, an application can get information about firewire node, can lock/unlock kernel streaming and can get notification at starting/stopping kernel streaming. Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp> Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
parent
9e796e7d59
commit
71c3797779
9 changed files with 285 additions and 7 deletions
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@ -107,9 +107,10 @@ enum {
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SNDRV_HWDEP_IFACE_FW_DIGI00X, /* Digidesign Digi 002/003 family */
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SNDRV_HWDEP_IFACE_FW_DIGI00X, /* Digidesign Digi 002/003 family */
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SNDRV_HWDEP_IFACE_FW_TASCAM, /* TASCAM FireWire series */
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SNDRV_HWDEP_IFACE_FW_TASCAM, /* TASCAM FireWire series */
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SNDRV_HWDEP_IFACE_LINE6, /* Line6 USB processors */
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SNDRV_HWDEP_IFACE_LINE6, /* Line6 USB processors */
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SNDRV_HWDEP_IFACE_FW_MOTU, /* MOTU FireWire series */
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/* Don't forget to change the following: */
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/* Don't forget to change the following: */
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SNDRV_HWDEP_IFACE_LAST = SNDRV_HWDEP_IFACE_LINE6
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SNDRV_HWDEP_IFACE_LAST = SNDRV_HWDEP_IFACE_FW_MOTU
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};
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};
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struct snd_hwdep_info {
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struct snd_hwdep_info {
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@ -65,7 +65,8 @@ union snd_firewire_event {
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#define SNDRV_FIREWIRE_TYPE_OXFW 4
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#define SNDRV_FIREWIRE_TYPE_OXFW 4
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#define SNDRV_FIREWIRE_TYPE_DIGI00X 5
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#define SNDRV_FIREWIRE_TYPE_DIGI00X 5
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#define SNDRV_FIREWIRE_TYPE_TASCAM 6
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#define SNDRV_FIREWIRE_TYPE_TASCAM 6
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/* RME, MOTU, ... */
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#define SNDRV_FIREWIRE_TYPE_MOTU 7
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/* RME... */
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struct snd_firewire_get_info {
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struct snd_firewire_get_info {
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unsigned int type; /* SNDRV_FIREWIRE_TYPE_xxx */
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unsigned int type; /* SNDRV_FIREWIRE_TYPE_xxx */
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@ -1,3 +1,3 @@
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snd-firewire-motu-objs := motu.o amdtp-motu.o motu-transaction.o motu-stream.o \
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snd-firewire-motu-objs := motu.o amdtp-motu.o motu-transaction.o motu-stream.o \
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motu-proc.o motu-pcm.o motu-midi.o
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motu-proc.o motu-pcm.o motu-midi.o motu-hwdep.o
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obj-$(CONFIG_SND_FIREWIRE_MOTU) += snd-firewire-motu.o
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obj-$(CONFIG_SND_FIREWIRE_MOTU) += snd-firewire-motu.o
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192
sound/firewire/motu/motu-hwdep.c
Normal file
192
sound/firewire/motu/motu-hwdep.c
Normal file
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@ -0,0 +1,192 @@
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/*
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* motu-hwdep.c - a part of driver for MOTU FireWire series
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*
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* Copyright (c) 2015-2017 Takashi Sakamoto <o-takashi@sakamocchi.jp>
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*
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* Licensed under the terms of the GNU General Public License, version 2.
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*/
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/*
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* This codes have five functionalities.
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*
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* 1.get information about firewire node
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* 2.get notification about starting/stopping stream
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* 3.lock/unlock streaming
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*
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*/
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#include "motu.h"
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static long hwdep_read(struct snd_hwdep *hwdep, char __user *buf, long count,
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loff_t *offset)
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{
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struct snd_motu *motu = hwdep->private_data;
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DEFINE_WAIT(wait);
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union snd_firewire_event event;
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spin_lock_irq(&motu->lock);
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while (!motu->dev_lock_changed) {
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prepare_to_wait(&motu->hwdep_wait, &wait, TASK_INTERRUPTIBLE);
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spin_unlock_irq(&motu->lock);
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schedule();
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finish_wait(&motu->hwdep_wait, &wait);
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if (signal_pending(current))
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return -ERESTARTSYS;
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spin_lock_irq(&motu->lock);
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}
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memset(&event, 0, sizeof(event));
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if (motu->dev_lock_changed) {
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event.lock_status.type = SNDRV_FIREWIRE_EVENT_LOCK_STATUS;
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event.lock_status.status = (motu->dev_lock_count > 0);
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motu->dev_lock_changed = false;
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count = min_t(long, count, sizeof(event.lock_status));
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}
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spin_unlock_irq(&motu->lock);
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if (copy_to_user(buf, &event, count))
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return -EFAULT;
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return count;
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}
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static unsigned int hwdep_poll(struct snd_hwdep *hwdep, struct file *file,
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poll_table *wait)
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{
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struct snd_motu *motu = hwdep->private_data;
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unsigned int events;
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poll_wait(file, &motu->hwdep_wait, wait);
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spin_lock_irq(&motu->lock);
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if (motu->dev_lock_changed)
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events = POLLIN | POLLRDNORM;
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else
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events = 0;
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spin_unlock_irq(&motu->lock);
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return events | POLLOUT;
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}
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static int hwdep_get_info(struct snd_motu *motu, void __user *arg)
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{
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struct fw_device *dev = fw_parent_device(motu->unit);
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struct snd_firewire_get_info info;
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memset(&info, 0, sizeof(info));
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info.type = SNDRV_FIREWIRE_TYPE_MOTU;
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info.card = dev->card->index;
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*(__be32 *)&info.guid[0] = cpu_to_be32(dev->config_rom[3]);
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*(__be32 *)&info.guid[4] = cpu_to_be32(dev->config_rom[4]);
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strlcpy(info.device_name, dev_name(&dev->device),
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sizeof(info.device_name));
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if (copy_to_user(arg, &info, sizeof(info)))
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return -EFAULT;
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return 0;
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}
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static int hwdep_lock(struct snd_motu *motu)
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{
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int err;
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spin_lock_irq(&motu->lock);
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if (motu->dev_lock_count == 0) {
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motu->dev_lock_count = -1;
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err = 0;
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} else {
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err = -EBUSY;
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}
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spin_unlock_irq(&motu->lock);
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return err;
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}
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static int hwdep_unlock(struct snd_motu *motu)
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{
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int err;
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spin_lock_irq(&motu->lock);
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if (motu->dev_lock_count == -1) {
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motu->dev_lock_count = 0;
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err = 0;
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} else {
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err = -EBADFD;
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}
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spin_unlock_irq(&motu->lock);
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return err;
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}
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static int hwdep_release(struct snd_hwdep *hwdep, struct file *file)
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{
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struct snd_motu *motu = hwdep->private_data;
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spin_lock_irq(&motu->lock);
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if (motu->dev_lock_count == -1)
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motu->dev_lock_count = 0;
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spin_unlock_irq(&motu->lock);
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return 0;
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}
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static int hwdep_ioctl(struct snd_hwdep *hwdep, struct file *file,
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unsigned int cmd, unsigned long arg)
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{
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struct snd_motu *motu = hwdep->private_data;
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switch (cmd) {
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case SNDRV_FIREWIRE_IOCTL_GET_INFO:
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return hwdep_get_info(motu, (void __user *)arg);
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case SNDRV_FIREWIRE_IOCTL_LOCK:
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return hwdep_lock(motu);
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case SNDRV_FIREWIRE_IOCTL_UNLOCK:
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return hwdep_unlock(motu);
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default:
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return -ENOIOCTLCMD;
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}
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}
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#ifdef CONFIG_COMPAT
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static int hwdep_compat_ioctl(struct snd_hwdep *hwdep, struct file *file,
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unsigned int cmd, unsigned long arg)
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{
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return hwdep_ioctl(hwdep, file, cmd,
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(unsigned long)compat_ptr(arg));
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}
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#else
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#define hwdep_compat_ioctl NULL
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#endif
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int snd_motu_create_hwdep_device(struct snd_motu *motu)
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{
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static const struct snd_hwdep_ops ops = {
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.read = hwdep_read,
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.release = hwdep_release,
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.poll = hwdep_poll,
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.ioctl = hwdep_ioctl,
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.ioctl_compat = hwdep_compat_ioctl,
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};
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struct snd_hwdep *hwdep;
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int err;
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err = snd_hwdep_new(motu->card, motu->card->driver, 0, &hwdep);
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if (err < 0)
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return err;
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strcpy(hwdep->name, "MOTU");
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hwdep->iface = SNDRV_HWDEP_IFACE_FW_MOTU;
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hwdep->ops = ops;
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hwdep->private_data = motu;
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hwdep->exclusive = true;
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return 0;
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}
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@ -12,6 +12,10 @@ static int midi_capture_open(struct snd_rawmidi_substream *substream)
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struct snd_motu *motu = substream->rmidi->private_data;
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struct snd_motu *motu = substream->rmidi->private_data;
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int err;
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int err;
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err = snd_motu_stream_lock_try(motu);
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if (err < 0)
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return err;
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mutex_lock(&motu->mutex);
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mutex_lock(&motu->mutex);
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motu->capture_substreams++;
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motu->capture_substreams++;
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@ -19,6 +23,9 @@ static int midi_capture_open(struct snd_rawmidi_substream *substream)
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mutex_unlock(&motu->mutex);
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mutex_unlock(&motu->mutex);
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if (err < 0)
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snd_motu_stream_lock_release(motu);
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return err;
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return err;
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}
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}
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@ -27,6 +34,10 @@ static int midi_playback_open(struct snd_rawmidi_substream *substream)
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struct snd_motu *motu = substream->rmidi->private_data;
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struct snd_motu *motu = substream->rmidi->private_data;
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int err;
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int err;
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err = snd_motu_stream_lock_try(motu);
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if (err < 0)
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return err;
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mutex_lock(&motu->mutex);
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mutex_lock(&motu->mutex);
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motu->playback_substreams++;
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motu->playback_substreams++;
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@ -34,6 +45,9 @@ static int midi_playback_open(struct snd_rawmidi_substream *substream)
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mutex_unlock(&motu->mutex);
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mutex_unlock(&motu->mutex);
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if (err < 0)
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snd_motu_stream_lock_release(motu);
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return err;
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return err;
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}
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}
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@ -48,6 +62,7 @@ static int midi_capture_close(struct snd_rawmidi_substream *substream)
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mutex_unlock(&motu->mutex);
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mutex_unlock(&motu->mutex);
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snd_motu_stream_lock_release(motu);
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return 0;
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return 0;
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}
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}
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@ -62,6 +77,7 @@ static int midi_playback_close(struct snd_rawmidi_substream *substream)
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mutex_unlock(&motu->mutex);
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mutex_unlock(&motu->mutex);
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snd_motu_stream_lock_release(motu);
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return 0;
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return 0;
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}
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}
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@ -159,15 +159,19 @@ static int pcm_open(struct snd_pcm_substream *substream)
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unsigned int rate;
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unsigned int rate;
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int err;
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int err;
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err = snd_motu_stream_lock_try(motu);
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if (err < 0)
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return err;
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mutex_lock(&motu->mutex);
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mutex_lock(&motu->mutex);
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err = protocol->cache_packet_formats(motu);
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err = protocol->cache_packet_formats(motu);
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if (err < 0)
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if (err < 0)
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return err;
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goto err_locked;
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err = init_hw_info(motu, substream);
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err = init_hw_info(motu, substream);
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if (err < 0)
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if (err < 0)
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return err;
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goto err_locked;
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/*
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/*
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* When source of clock is not internal or any PCM streams are running,
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* When source of clock is not internal or any PCM streams are running,
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@ -175,13 +179,13 @@ static int pcm_open(struct snd_pcm_substream *substream)
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*/
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*/
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err = protocol->get_clock_source(motu, &src);
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err = protocol->get_clock_source(motu, &src);
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if (err < 0)
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if (err < 0)
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return err;
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goto err_locked;
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if (src != SND_MOTU_CLOCK_SOURCE_INTERNAL ||
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if (src != SND_MOTU_CLOCK_SOURCE_INTERNAL ||
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amdtp_stream_pcm_running(&motu->tx_stream) ||
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amdtp_stream_pcm_running(&motu->tx_stream) ||
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amdtp_stream_pcm_running(&motu->rx_stream)) {
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amdtp_stream_pcm_running(&motu->rx_stream)) {
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err = protocol->get_clock_rate(motu, &rate);
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err = protocol->get_clock_rate(motu, &rate);
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if (err < 0)
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if (err < 0)
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return err;
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goto err_locked;
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substream->runtime->hw.rate_min = rate;
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substream->runtime->hw.rate_min = rate;
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substream->runtime->hw.rate_max = rate;
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substream->runtime->hw.rate_max = rate;
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}
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}
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@ -190,11 +194,19 @@ static int pcm_open(struct snd_pcm_substream *substream)
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mutex_unlock(&motu->mutex);
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mutex_unlock(&motu->mutex);
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return err;
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err_locked:
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mutex_unlock(&motu->mutex);
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snd_motu_stream_lock_release(motu);
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return err;
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return err;
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}
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}
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static int pcm_close(struct snd_pcm_substream *substream)
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static int pcm_close(struct snd_pcm_substream *substream)
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{
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{
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struct snd_motu *motu = substream->private_data;
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snd_motu_stream_lock_release(motu);
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return 0;
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return 0;
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}
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}
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@ -341,3 +341,41 @@ void snd_motu_stream_destroy_duplex(struct snd_motu *motu)
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motu->playback_substreams = 0;
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motu->playback_substreams = 0;
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motu->capture_substreams = 0;
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motu->capture_substreams = 0;
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}
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}
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static void motu_lock_changed(struct snd_motu *motu)
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{
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motu->dev_lock_changed = true;
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wake_up(&motu->hwdep_wait);
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}
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int snd_motu_stream_lock_try(struct snd_motu *motu)
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{
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||||||
|
int err;
|
||||||
|
|
||||||
|
spin_lock_irq(&motu->lock);
|
||||||
|
|
||||||
|
if (motu->dev_lock_count < 0) {
|
||||||
|
err = -EBUSY;
|
||||||
|
goto out;
|
||||||
|
}
|
||||||
|
|
||||||
|
if (motu->dev_lock_count++ == 0)
|
||||||
|
motu_lock_changed(motu);
|
||||||
|
err = 0;
|
||||||
|
out:
|
||||||
|
spin_unlock_irq(&motu->lock);
|
||||||
|
return err;
|
||||||
|
}
|
||||||
|
|
||||||
|
void snd_motu_stream_lock_release(struct snd_motu *motu)
|
||||||
|
{
|
||||||
|
spin_lock_irq(&motu->lock);
|
||||||
|
|
||||||
|
if (WARN_ON(motu->dev_lock_count <= 0))
|
||||||
|
goto out;
|
||||||
|
|
||||||
|
if (--motu->dev_lock_count == 0)
|
||||||
|
motu_lock_changed(motu);
|
||||||
|
out:
|
||||||
|
spin_unlock_irq(&motu->lock);
|
||||||
|
}
|
||||||
|
|
|
@ -109,6 +109,10 @@ static void do_registration(struct work_struct *work)
|
||||||
goto error;
|
goto error;
|
||||||
}
|
}
|
||||||
|
|
||||||
|
err = snd_motu_create_hwdep_device(motu);
|
||||||
|
if (err < 0)
|
||||||
|
goto error;
|
||||||
|
|
||||||
err = snd_card_register(motu->card);
|
err = snd_card_register(motu->card);
|
||||||
if (err < 0)
|
if (err < 0)
|
||||||
goto error;
|
goto error;
|
||||||
|
@ -145,6 +149,7 @@ static int motu_probe(struct fw_unit *unit,
|
||||||
|
|
||||||
mutex_init(&motu->mutex);
|
mutex_init(&motu->mutex);
|
||||||
spin_lock_init(&motu->lock);
|
spin_lock_init(&motu->lock);
|
||||||
|
init_waitqueue_head(&motu->hwdep_wait);
|
||||||
|
|
||||||
/* Allocate and register this sound card later. */
|
/* Allocate and register this sound card later. */
|
||||||
INIT_DEFERRABLE_WORK(&motu->dwork, do_registration);
|
INIT_DEFERRABLE_WORK(&motu->dwork, do_registration);
|
||||||
|
|
|
@ -16,12 +16,16 @@
|
||||||
#include <linux/mod_devicetable.h>
|
#include <linux/mod_devicetable.h>
|
||||||
#include <linux/mutex.h>
|
#include <linux/mutex.h>
|
||||||
#include <linux/slab.h>
|
#include <linux/slab.h>
|
||||||
|
#include <linux/compat.h>
|
||||||
|
#include <linux/sched/signal.h>
|
||||||
|
|
||||||
#include <sound/control.h>
|
#include <sound/control.h>
|
||||||
#include <sound/core.h>
|
#include <sound/core.h>
|
||||||
#include <sound/pcm.h>
|
#include <sound/pcm.h>
|
||||||
#include <sound/info.h>
|
#include <sound/info.h>
|
||||||
#include <sound/rawmidi.h>
|
#include <sound/rawmidi.h>
|
||||||
|
#include <sound/firewire.h>
|
||||||
|
#include <sound/hwdep.h>
|
||||||
|
|
||||||
#include "../lib.h"
|
#include "../lib.h"
|
||||||
#include "../amdtp-stream.h"
|
#include "../amdtp-stream.h"
|
||||||
|
@ -62,6 +66,11 @@ struct snd_motu {
|
||||||
/* For notification. */
|
/* For notification. */
|
||||||
struct fw_address_handler async_handler;
|
struct fw_address_handler async_handler;
|
||||||
u32 msg;
|
u32 msg;
|
||||||
|
|
||||||
|
/* For uapi */
|
||||||
|
int dev_lock_count;
|
||||||
|
bool dev_lock_changed;
|
||||||
|
wait_queue_head_t hwdep_wait;
|
||||||
};
|
};
|
||||||
|
|
||||||
enum snd_motu_spec_flags {
|
enum snd_motu_spec_flags {
|
||||||
|
@ -136,10 +145,14 @@ int snd_motu_stream_init_duplex(struct snd_motu *motu);
|
||||||
void snd_motu_stream_destroy_duplex(struct snd_motu *motu);
|
void snd_motu_stream_destroy_duplex(struct snd_motu *motu);
|
||||||
int snd_motu_stream_start_duplex(struct snd_motu *motu, unsigned int rate);
|
int snd_motu_stream_start_duplex(struct snd_motu *motu, unsigned int rate);
|
||||||
void snd_motu_stream_stop_duplex(struct snd_motu *motu);
|
void snd_motu_stream_stop_duplex(struct snd_motu *motu);
|
||||||
|
int snd_motu_stream_lock_try(struct snd_motu *motu);
|
||||||
|
void snd_motu_stream_lock_release(struct snd_motu *motu);
|
||||||
|
|
||||||
void snd_motu_proc_init(struct snd_motu *motu);
|
void snd_motu_proc_init(struct snd_motu *motu);
|
||||||
|
|
||||||
int snd_motu_create_pcm_devices(struct snd_motu *motu);
|
int snd_motu_create_pcm_devices(struct snd_motu *motu);
|
||||||
|
|
||||||
int snd_motu_create_midi_devices(struct snd_motu *motu);
|
int snd_motu_create_midi_devices(struct snd_motu *motu);
|
||||||
|
|
||||||
|
int snd_motu_create_hwdep_device(struct snd_motu *motu);
|
||||||
#endif
|
#endif
|
||||||
|
|
Loading…
Reference in a new issue