22 	struct snd_tscm *tscm = hwdep->private_data;  in hwdep_read()  local
28 	spin_lock_irq(&tscm->lock);  in hwdep_read()
30 	while (!tscm->dev_lock_changed) {  in hwdep_read()
31 		prepare_to_wait(&tscm->hwdep_wait, &wait, TASK_INTERRUPTIBLE);  in hwdep_read()
32 		spin_unlock_irq(&tscm->lock);  in hwdep_read()
34 		finish_wait(&tscm->hwdep_wait, &wait);  in hwdep_read()
37 		spin_lock_irq(&tscm->lock);  in hwdep_read()
40 	event.lock_status.status = (tscm->dev_lock_count > 0);  in hwdep_read()
41 	tscm->dev_lock_changed = false;  in hwdep_read()
43 	spin_unlock_irq(&tscm->lock);  in hwdep_read()
56 	struct snd_tscm *tscm = hwdep->private_data;  in hwdep_poll()  local
59 	poll_wait(file, &tscm->hwdep_wait, wait);  in hwdep_poll()
61 	spin_lock_irq(&tscm->lock);  in hwdep_poll()
62 	if (tscm->dev_lock_changed)  in hwdep_poll()
66 	spin_unlock_irq(&tscm->lock);  in hwdep_poll()
71 static int hwdep_get_info(struct snd_tscm *tscm, void __user *arg)  in hwdep_get_info()  argument
73 	struct fw_device *dev = fw_parent_device(tscm->unit);  in hwdep_get_info()
90 static int hwdep_lock(struct snd_tscm *tscm)  in hwdep_lock()  argument
94 	spin_lock_irq(&tscm->lock);  in hwdep_lock()
96 	if (tscm->dev_lock_count == 0) {  in hwdep_lock()
97 		tscm->dev_lock_count = -1;  in hwdep_lock()
103 	spin_unlock_irq(&tscm->lock);  in hwdep_lock()
108 static int hwdep_unlock(struct snd_tscm *tscm)  in hwdep_unlock()  argument
112 	spin_lock_irq(&tscm->lock);  in hwdep_unlock()
114 	if (tscm->dev_lock_count == -1) {  in hwdep_unlock()
115 		tscm->dev_lock_count = 0;  in hwdep_unlock()
121 	spin_unlock_irq(&tscm->lock);  in hwdep_unlock()
128 	struct snd_tscm *tscm = hwdep->private_data;  in hwdep_release()  local
130 	spin_lock_irq(&tscm->lock);  in hwdep_release()
131 	if (tscm->dev_lock_count == -1)  in hwdep_release()
132 		tscm->dev_lock_count = 0;  in hwdep_release()
133 	spin_unlock_irq(&tscm->lock);  in hwdep_release()
141 	struct snd_tscm *tscm = hwdep->private_data;  in hwdep_ioctl()  local
145 		return hwdep_get_info(tscm, (void __user *)arg);  in hwdep_ioctl()
147 		return hwdep_lock(tscm);  in hwdep_ioctl()
149 		return hwdep_unlock(tscm);  in hwdep_ioctl()
174 int snd_tscm_create_hwdep_device(struct snd_tscm *tscm)  in snd_tscm_create_hwdep_device()  argument
179 	err = snd_hwdep_new(tscm->card, "Tascam", 0, &hwdep);  in snd_tscm_create_hwdep_device()
186 	hwdep->private_data = tscm;  in snd_tscm_create_hwdep_device()