82 static void drain_midi_queue(int dev)  in drain_midi_queue()  argument
89 	if (midi_devs[dev]->buffer_status != NULL)  in drain_midi_queue()
90 		while (!signal_pending(current) && midi_devs[dev]->buffer_status(dev))   in drain_midi_queue()
91 			interruptible_sleep_on_timeout(&midi_sleeper[dev],  in drain_midi_queue()
95 static void midi_input_intr(int dev, unsigned char data)  in midi_input_intr()  argument
97 	if (midi_in_buf[dev] == NULL)  in midi_input_intr()
107 	if (SPACE_AVAIL(midi_in_buf[dev])) {  in midi_input_intr()
108 		QUEUE_BYTE(midi_in_buf[dev], data);  in midi_input_intr()
109 		wake_up(&input_sleeper[dev]);  in midi_input_intr()
113 static void midi_output_intr(int dev)  in midi_output_intr()  argument
123 	int             dev;  in midi_poll()  local
129 		for (dev = 0; dev < num_midis; dev++)  in midi_poll()
130 			if (midi_devs[dev] != NULL && midi_out_buf[dev] != NULL)  in midi_poll()
132 				while (DATA_AVAIL(midi_out_buf[dev]))  in midi_poll()
135 					int c = midi_out_buf[dev]->queue[midi_out_buf[dev]->head];  in midi_poll()
138 					ok = midi_devs[dev]->outputc(dev, c);  in midi_poll()
142 					midi_out_buf[dev]->head = (midi_out_buf[dev]->head + 1) % MAX_QUEUE_SIZE;  in midi_poll()
143 					midi_out_buf[dev]->len--;  in midi_poll()
146 				if (DATA_AVAIL(midi_out_buf[dev]) < 100)  in midi_poll()
147 					wake_up(&midi_sleeper[dev]);  in midi_poll()
158 int MIDIbuf_open(int dev, struct file *file)  in MIDIbuf_open()  argument
162 	dev = dev >> 4;  in MIDIbuf_open()
170 	if (dev < 0 || dev >= num_midis || midi_devs[dev] == NULL)  in MIDIbuf_open()
176 	if (midi_devs[dev]->owner)  in MIDIbuf_open()
177 		__MOD_INC_USE_COUNT (midi_devs[dev]->owner);  in MIDIbuf_open()
179 	if ((err = midi_devs[dev]->open(dev, mode,  in MIDIbuf_open()
183 	parms[dev].prech_timeout = MAX_SCHEDULE_TIMEOUT;  in MIDIbuf_open()
184 	midi_in_buf[dev] = (struct midi_buf *) vmalloc(sizeof(struct midi_buf));  in MIDIbuf_open()
186 	if (midi_in_buf[dev] == NULL)  in MIDIbuf_open()
189 		midi_devs[dev]->close(dev);  in MIDIbuf_open()
192 	midi_in_buf[dev]->len = midi_in_buf[dev]->head = midi_in_buf[dev]->tail = 0;  in MIDIbuf_open()
194 	midi_out_buf[dev] = (struct midi_buf *) vmalloc(sizeof(struct midi_buf));  in MIDIbuf_open()
196 	if (midi_out_buf[dev] == NULL)  in MIDIbuf_open()
199 		midi_devs[dev]->close(dev);  in MIDIbuf_open()
200 		vfree(midi_in_buf[dev]);  in MIDIbuf_open()
201 		midi_in_buf[dev] = NULL;  in MIDIbuf_open()
204 	midi_out_buf[dev]->len = midi_out_buf[dev]->head = midi_out_buf[dev]->tail = 0;  in MIDIbuf_open()
207 	init_waitqueue_head(&midi_sleeper[dev]);  in MIDIbuf_open()
208 	init_waitqueue_head(&input_sleeper[dev]);  in MIDIbuf_open()
218 void MIDIbuf_release(int dev, struct file *file)  in MIDIbuf_release()  argument
223 	dev = dev >> 4;  in MIDIbuf_release()
226 	if (dev < 0 || dev >= num_midis || midi_devs[dev] == NULL)  in MIDIbuf_release()
238 		midi_devs[dev]->outputc(dev, 0xfe);	/*  in MIDIbuf_release()
243 		while (!signal_pending(current) && DATA_AVAIL(midi_out_buf[dev]))  in MIDIbuf_release()
244 			  interruptible_sleep_on(&midi_sleeper[dev]);  in MIDIbuf_release()
249 		drain_midi_queue(dev);	/*  in MIDIbuf_release()
255 	midi_devs[dev]->close(dev);  in MIDIbuf_release()
260 	vfree(midi_in_buf[dev]);  in MIDIbuf_release()
261 	vfree(midi_out_buf[dev]);  in MIDIbuf_release()
262 	midi_in_buf[dev] = NULL;  in MIDIbuf_release()
263 	midi_out_buf[dev] = NULL;  in MIDIbuf_release()
265 	if (midi_devs[dev]->owner)  in MIDIbuf_release()
266 		__MOD_DEC_USE_COUNT (midi_devs[dev]->owner);  in MIDIbuf_release()
269 int MIDIbuf_write(int dev, struct file *file, const char *buf, int count)  in MIDIbuf_write()  argument
275 	dev = dev >> 4;  in MIDIbuf_write()
287 		n = SPACE_AVAIL(midi_out_buf[dev]);  in MIDIbuf_write()
298 			interruptible_sleep_on(&midi_sleeper[dev]);  in MIDIbuf_write()
304 			n = SPACE_AVAIL(midi_out_buf[dev]);  in MIDIbuf_write()
313 			QUEUE_BYTE(midi_out_buf[dev], tmp_data);  in MIDIbuf_write()
322 int MIDIbuf_read(int dev, struct file *file, char *buf, int count)  in MIDIbuf_read()  argument
328 	dev = dev >> 4;  in MIDIbuf_read()
333 	if (!DATA_AVAIL(midi_in_buf[dev])) {	/*  in MIDIbuf_read()
340 		interruptible_sleep_on_timeout(&input_sleeper[dev],  in MIDIbuf_read()
341 					       parms[dev].prech_timeout);  in MIDIbuf_read()
346 	if (c == 0 && DATA_AVAIL(midi_in_buf[dev]))	/*  in MIDIbuf_read()
350 		n = DATA_AVAIL(midi_in_buf[dev]);  in MIDIbuf_read()
358 			REMOVE_BYTE(midi_in_buf[dev], tmp_data);  in MIDIbuf_read()
369 int MIDIbuf_ioctl(int dev, struct file *file,  in MIDIbuf_ioctl()  argument
374 	dev = dev >> 4;  in MIDIbuf_ioctl()
378 		if (midi_devs[dev]->coproc)	/* Coprocessor ioctl */  in MIDIbuf_ioctl()
379 			return midi_devs[dev]->coproc->ioctl(midi_devs[dev]->coproc->devc, cmd, arg, 0);  in MIDIbuf_ioctl()
393 				parms[dev].prech_timeout = val;  in MIDIbuf_ioctl()
397 				if (!midi_devs[dev]->ioctl)  in MIDIbuf_ioctl()
399 				return midi_devs[dev]->ioctl(dev, cmd, arg);  in MIDIbuf_ioctl()
405 unsigned int MIDIbuf_poll(int dev, struct file *file, poll_table * wait)  in MIDIbuf_poll()  argument
409 	dev = dev >> 4;  in MIDIbuf_poll()
412 	poll_wait(file, &input_sleeper[dev], wait);  in MIDIbuf_poll()
413 	if (DATA_AVAIL(midi_in_buf[dev]))  in MIDIbuf_poll()
417 	poll_wait(file, &midi_sleeper[dev], wait);  in MIDIbuf_poll()
418 	if (!SPACE_AVAIL(midi_out_buf[dev]))  in MIDIbuf_poll()
434 int MIDIbuf_avail(int dev)  in MIDIbuf_avail()  argument
436         if (midi_in_buf[dev])  in MIDIbuf_avail()
437 		return DATA_AVAIL (midi_in_buf[dev]);  in MIDIbuf_avail()