19 static long hwdep_read_locked(struct snd_tscm *tscm, char __user *buf,  in hwdep_read_locked()  argument
27 	event.lock_status.status = (tscm->dev_lock_count > 0);  in hwdep_read_locked()
28 	tscm->dev_lock_changed = false;  in hwdep_read_locked()
41 	struct snd_tscm *tscm = hwdep->private_data;  in hwdep_read()  local
45 	spin_lock_irq(&tscm->lock);  in hwdep_read()
47 	while (!tscm->dev_lock_changed) {  in hwdep_read()
48 		prepare_to_wait(&tscm->hwdep_wait, &wait, TASK_INTERRUPTIBLE);  in hwdep_read()
49 		spin_unlock_irq(&tscm->lock);  in hwdep_read()
51 		finish_wait(&tscm->hwdep_wait, &wait);  in hwdep_read()
54 		spin_lock_irq(&tscm->lock);  in hwdep_read()
58 	count = hwdep_read_locked(tscm, buf, count);  in hwdep_read()
59 	spin_unlock_irq(&tscm->lock);  in hwdep_read()
67 	struct snd_tscm *tscm = hwdep->private_data;  in hwdep_poll()  local
70 	poll_wait(file, &tscm->hwdep_wait, wait);  in hwdep_poll()
72 	spin_lock_irq(&tscm->lock);  in hwdep_poll()
73 	if (tscm->dev_lock_changed)  in hwdep_poll()
77 	spin_unlock_irq(&tscm->lock);  in hwdep_poll()
82 static int hwdep_get_info(struct snd_tscm *tscm, void __user *arg)  in hwdep_get_info()  argument
84 	struct fw_device *dev = fw_parent_device(tscm->unit);  in hwdep_get_info()
101 static int hwdep_lock(struct snd_tscm *tscm)  in hwdep_lock()  argument
105 	spin_lock_irq(&tscm->lock);  in hwdep_lock()
107 	if (tscm->dev_lock_count == 0) {  in hwdep_lock()
108 		tscm->dev_lock_count = -1;  in hwdep_lock()
114 	spin_unlock_irq(&tscm->lock);  in hwdep_lock()
119 static int hwdep_unlock(struct snd_tscm *tscm)  in hwdep_unlock()  argument
123 	spin_lock_irq(&tscm->lock);  in hwdep_unlock()
125 	if (tscm->dev_lock_count == -1) {  in hwdep_unlock()
126 		tscm->dev_lock_count = 0;  in hwdep_unlock()
132 	spin_unlock_irq(&tscm->lock);  in hwdep_unlock()
139 	struct snd_tscm *tscm = hwdep->private_data;  in hwdep_release()  local
141 	spin_lock_irq(&tscm->lock);  in hwdep_release()
142 	if (tscm->dev_lock_count == -1)  in hwdep_release()
143 		tscm->dev_lock_count = 0;  in hwdep_release()
144 	spin_unlock_irq(&tscm->lock);  in hwdep_release()
152 	struct snd_tscm *tscm = hwdep->private_data;  in hwdep_ioctl()  local
156 		return hwdep_get_info(tscm, (void __user *)arg);  in hwdep_ioctl()
158 		return hwdep_lock(tscm);  in hwdep_ioctl()
160 		return hwdep_unlock(tscm);  in hwdep_ioctl()
185 int snd_tscm_create_hwdep_device(struct snd_tscm *tscm)  in snd_tscm_create_hwdep_device()  argument
190 	err = snd_hwdep_new(tscm->card, "Tascam", 0, &hwdep);  in snd_tscm_create_hwdep_device()
197 	hwdep->private_data = tscm;  in snd_tscm_create_hwdep_device()