firewire/fireworks/fireworks_hwdep.c

22 hwdep_read_resp_buf(struct snd_efw *efw, char __user *buf, long remained,
42 	spin_lock_irq(&efw->lock);
49 	pull_ptr = efw->pull_ptr;
51 	while (efw->push_ptr != pull_ptr) {
62 				(unsigned int)(pull_ptr - efw->resp_buf);
65 			spin_unlock_irq(&efw->lock);
70 			spin_lock_irq(&efw->lock);
73 			if (pull_ptr >= efw->resp_buf + snd_efw_resp_buf_size)
91 	efw->pull_ptr = pull_ptr;
93 	spin_unlock_irq(&efw->lock);
99 hwdep_read_locked(struct snd_efw *efw, char __user *buf, long count,
106 	spin_lock_irq(&efw->lock);
108 	event.lock_status.status = (efw->dev_lock_count > 0);
109 	efw->dev_lock_changed = false;
111 	spin_unlock_irq(&efw->lock);
125 	struct snd_efw *efw = hwdep->private_data;
130 	spin_lock_irq(&efw->lock);
132 	dev_lock_changed = efw->dev_lock_changed;
133 	queued = efw->push_ptr != efw->pull_ptr;
136 		prepare_to_wait(&efw->hwdep_wait, &wait, TASK_INTERRUPTIBLE);
137 		spin_unlock_irq(&efw->lock);
139 		finish_wait(&efw->hwdep_wait, &wait);
142 		spin_lock_irq(&efw->lock);
143 		dev_lock_changed = efw->dev_lock_changed;
144 		queued = efw->push_ptr != efw->pull_ptr;
147 	spin_unlock_irq(&efw->lock);
150 		count = hwdep_read_locked(efw, buf, count, offset);
152 		count = hwdep_read_resp_buf(efw, buf, count, offset);
161 	struct snd_efw *efw = hwdep->private_data;
180 	if (snd_efw_transaction_cmd(efw->unit, buf, count) < 0)
190 	struct snd_efw *efw = hwdep->private_data;
193 	poll_wait(file, &efw->hwdep_wait, wait);
195 	spin_lock_irq(&efw->lock);
196 	if (efw->dev_lock_changed || efw->pull_ptr != efw->push_ptr)
200 	spin_unlock_irq(&efw->lock);
206 hwdep_get_info(struct snd_efw *efw, void __user *arg)
208 	struct fw_device *dev = fw_parent_device(efw->unit);
226 hwdep_lock(struct snd_efw *efw)
230 	spin_lock_irq(&efw->lock);
232 	if (efw->dev_lock_count == 0) {
233 		efw->dev_lock_count = -1;
239 	spin_unlock_irq(&efw->lock);
245 hwdep_unlock(struct snd_efw *efw)
249 	spin_lock_irq(&efw->lock);
251 	if (efw->dev_lock_count == -1) {
252 		efw->dev_lock_count = 0;
258 	spin_unlock_irq(&efw->lock);
266 	struct snd_efw *efw = hwdep->private_data;
268 	spin_lock_irq(&efw->lock);
269 	if (efw->dev_lock_count == -1)
270 		efw->dev_lock_count = 0;
271 	spin_unlock_irq(&efw->lock);
280 	struct snd_efw *efw = hwdep->private_data;
284 		return hwdep_get_info(efw, (void __user *)arg);
286 		return hwdep_lock(efw);
288 		return hwdep_unlock(efw);
306 int snd_efw_create_hwdep_device(struct snd_efw *efw)
319 	err = snd_hwdep_new(efw->card, "Fireworks", 0, &hwdep);
325 	hwdep->private_data = efw;