3  * ff-hwdep.c - a part of driver for RME Fireface series
16 #include "ff.h"
21 	struct snd_ff *ff = hwdep->private_data;  in hwdep_read()  local
25 	spin_lock_irq(&ff->lock);  in hwdep_read()
27 	while (!ff->dev_lock_changed) {  in hwdep_read()
28 		prepare_to_wait(&ff->hwdep_wait, &wait, TASK_INTERRUPTIBLE);  in hwdep_read()
29 		spin_unlock_irq(&ff->lock);  in hwdep_read()
31 		finish_wait(&ff->hwdep_wait, &wait);  in hwdep_read()
34 		spin_lock_irq(&ff->lock);  in hwdep_read()
38 	if (ff->dev_lock_changed) {  in hwdep_read()
40 		event.lock_status.status = (ff->dev_lock_count > 0);  in hwdep_read()
41 		ff->dev_lock_changed = false;  in hwdep_read()
46 	spin_unlock_irq(&ff->lock);  in hwdep_read()
57 	struct snd_ff *ff = hwdep->private_data;  in hwdep_poll()  local
60 	poll_wait(file, &ff->hwdep_wait, wait);  in hwdep_poll()
62 	spin_lock_irq(&ff->lock);  in hwdep_poll()
63 	if (ff->dev_lock_changed)  in hwdep_poll()
67 	spin_unlock_irq(&ff->lock);  in hwdep_poll()
72 static int hwdep_get_info(struct snd_ff *ff, void __user *arg)  in hwdep_get_info()  argument
74 	struct fw_device *dev = fw_parent_device(ff->unit);  in hwdep_get_info()
91 static int hwdep_lock(struct snd_ff *ff)  in hwdep_lock()  argument
95 	spin_lock_irq(&ff->lock);  in hwdep_lock()
97 	if (ff->dev_lock_count == 0) {  in hwdep_lock()
98 		ff->dev_lock_count = -1;  in hwdep_lock()
104 	spin_unlock_irq(&ff->lock);  in hwdep_lock()
109 static int hwdep_unlock(struct snd_ff *ff)  in hwdep_unlock()  argument
113 	spin_lock_irq(&ff->lock);  in hwdep_unlock()
115 	if (ff->dev_lock_count == -1) {  in hwdep_unlock()
116 		ff->dev_lock_count = 0;  in hwdep_unlock()
122 	spin_unlock_irq(&ff->lock);  in hwdep_unlock()
129 	struct snd_ff *ff = hwdep->private_data;  in hwdep_release()  local
131 	spin_lock_irq(&ff->lock);  in hwdep_release()
132 	if (ff->dev_lock_count == -1)  in hwdep_release()
133 		ff->dev_lock_count = 0;  in hwdep_release()
134 	spin_unlock_irq(&ff->lock);  in hwdep_release()
142 	struct snd_ff *ff = hwdep->private_data;  in hwdep_ioctl()  local
146 		return hwdep_get_info(ff, (void __user *)arg);  in hwdep_ioctl()
148 		return hwdep_lock(ff);  in hwdep_ioctl()
150 		return hwdep_unlock(ff);  in hwdep_ioctl()
167 int snd_ff_create_hwdep_devices(struct snd_ff *ff)  in snd_ff_create_hwdep_devices()  argument
179 	err = snd_hwdep_new(ff->card, ff->card->driver, 0, &hwdep);  in snd_ff_create_hwdep_devices()
183 	strcpy(hwdep->name, ff->card->driver);  in snd_ff_create_hwdep_devices()
186 	hwdep->private_data = ff;  in snd_ff_create_hwdep_devices()