28 dbc_send_packet(struct dbc_port *port, char *packet, unsigned int size)  in dbc_send_packet()  argument
32 	len = kfifo_len(&port->write_fifo);  in dbc_send_packet()
36 		size = kfifo_out(&port->write_fifo, packet, size);  in dbc_send_packet()
40 static int dbc_start_tx(struct dbc_port *port)  in dbc_start_tx()  argument
41 	__releases(&port->port_lock)  in dbc_start_tx()
42 	__acquires(&port->port_lock)  in dbc_start_tx()
48 	struct list_head	*pool = &port->write_pool;  in dbc_start_tx()
52 		len = dbc_send_packet(port, req->buf, DBC_MAX_PACKET);  in dbc_start_tx()
60 		spin_unlock(&port->port_lock);  in dbc_start_tx()
62 		spin_lock(&port->port_lock);  in dbc_start_tx()
70 	if (do_tty_wake && port->port.tty)  in dbc_start_tx()
71 		tty_wakeup(port->port.tty);  in dbc_start_tx()
76 static void dbc_start_rx(struct dbc_port *port)  in dbc_start_rx()  argument
77 	__releases(&port->port_lock)  in dbc_start_rx()
78 	__acquires(&port->port_lock)  in dbc_start_rx()
82 	struct list_head	*pool = &port->read_pool;  in dbc_start_rx()
85 		if (!port->port.tty)  in dbc_start_rx()
92 		spin_unlock(&port->port_lock);  in dbc_start_rx()
94 		spin_lock(&port->port_lock);  in dbc_start_rx()
107 	struct dbc_port		*port = dbc_to_port(dbc);  in dbc_read_complete()  local
109 	spin_lock_irqsave(&port->port_lock, flags);  in dbc_read_complete()
110 	list_add_tail(&req->list_pool, &port->read_queue);  in dbc_read_complete()
111 	tasklet_schedule(&port->push);  in dbc_read_complete()
112 	spin_unlock_irqrestore(&port->port_lock, flags);  in dbc_read_complete()
118 	struct dbc_port		*port = dbc_to_port(dbc);  in dbc_write_complete()  local
120 	spin_lock_irqsave(&port->port_lock, flags);  in dbc_write_complete()
121 	list_add(&req->list_pool, &port->write_pool);  in dbc_write_complete()
124 		dbc_start_tx(port);  in dbc_write_complete()
133 	spin_unlock_irqrestore(&port->port_lock, flags);  in dbc_write_complete()
183 	struct dbc_port		*port;  in dbc_tty_install()  local
186 	port = idr_find(&dbc_tty_minors, tty->index);  in dbc_tty_install()
189 	if (!port)  in dbc_tty_install()
192 	tty->driver_data = port;  in dbc_tty_install()
194 	return tty_port_install(&port->port, driver, tty);  in dbc_tty_install()
199 	struct dbc_port		*port = tty->driver_data;  in dbc_tty_open()  local
201 	return tty_port_open(&port->port, tty, file);  in dbc_tty_open()
206 	struct dbc_port		*port = tty->driver_data;  in dbc_tty_close()  local
208 	tty_port_close(&port->port, tty, file);  in dbc_tty_close()
215 	struct dbc_port		*port = tty->driver_data;  in dbc_tty_write()  local
218 	spin_lock_irqsave(&port->port_lock, flags);  in dbc_tty_write()
220 		count = kfifo_in(&port->write_fifo, buf, count);  in dbc_tty_write()
221 	dbc_start_tx(port);  in dbc_tty_write()
222 	spin_unlock_irqrestore(&port->port_lock, flags);  in dbc_tty_write()
229 	struct dbc_port		*port = tty->driver_data;  in dbc_tty_put_char()  local
233 	spin_lock_irqsave(&port->port_lock, flags);  in dbc_tty_put_char()
234 	status = kfifo_put(&port->write_fifo, ch);  in dbc_tty_put_char()
235 	spin_unlock_irqrestore(&port->port_lock, flags);  in dbc_tty_put_char()
242 	struct dbc_port		*port = tty->driver_data;  in dbc_tty_flush_chars()  local
245 	spin_lock_irqsave(&port->port_lock, flags);  in dbc_tty_flush_chars()
246 	dbc_start_tx(port);  in dbc_tty_flush_chars()
247 	spin_unlock_irqrestore(&port->port_lock, flags);  in dbc_tty_flush_chars()
252 	struct dbc_port		*port = tty->driver_data;  in dbc_tty_write_room()  local
256 	spin_lock_irqsave(&port->port_lock, flags);  in dbc_tty_write_room()
257 	room = kfifo_avail(&port->write_fifo);  in dbc_tty_write_room()
258 	spin_unlock_irqrestore(&port->port_lock, flags);  in dbc_tty_write_room()
265 	struct dbc_port		*port = tty->driver_data;  in dbc_tty_chars_in_buffer()  local
269 	spin_lock_irqsave(&port->port_lock, flags);  in dbc_tty_chars_in_buffer()
270 	chars = kfifo_len(&port->write_fifo);  in dbc_tty_chars_in_buffer()
271 	spin_unlock_irqrestore(&port->port_lock, flags);  in dbc_tty_chars_in_buffer()
278 	struct dbc_port		*port = tty->driver_data;  in dbc_tty_unthrottle()  local
281 	spin_lock_irqsave(&port->port_lock, flags);  in dbc_tty_unthrottle()
282 	tasklet_schedule(&port->push);  in dbc_tty_unthrottle()
283 	spin_unlock_irqrestore(&port->port_lock, flags);  in dbc_tty_unthrottle()
305 	struct dbc_port		*port = from_tasklet(port, t, push);  in dbc_rx_push()  local
306 	struct list_head	*queue = &port->read_queue;  in dbc_rx_push()
308 	spin_lock_irqsave(&port->port_lock, flags);  in dbc_rx_push()
309 	tty = port->port.tty;  in dbc_rx_push()
333 			n = port->n_read;  in dbc_rx_push()
339 			count = tty_insert_flip_string(&port->port, packet,  in dbc_rx_push()
344 				port->n_read += count;  in dbc_rx_push()
347 			port->n_read = 0;  in dbc_rx_push()
350 		list_move(&req->list_pool, &port->read_pool);  in dbc_rx_push()
354 		tty_flip_buffer_push(&port->port);  in dbc_rx_push()
359 				tasklet_schedule(&port->push);  in dbc_rx_push()
366 		dbc_start_rx(port);  in dbc_rx_push()
368 	spin_unlock_irqrestore(&port->port_lock, flags);  in dbc_rx_push()
374 	struct dbc_port	*port = container_of(_port, struct dbc_port, port);  in dbc_port_activate()  local
376 	spin_lock_irqsave(&port->port_lock, flags);  in dbc_port_activate()
377 	dbc_start_rx(port);  in dbc_port_activate()
378 	spin_unlock_irqrestore(&port->port_lock, flags);  in dbc_port_activate()
388 xhci_dbc_tty_init_port(struct xhci_dbc *dbc, struct dbc_port *port)  in xhci_dbc_tty_init_port()  argument
390 	tty_port_init(&port->port);  in xhci_dbc_tty_init_port()
391 	spin_lock_init(&port->port_lock);  in xhci_dbc_tty_init_port()
392 	tasklet_setup(&port->push, dbc_rx_push);  in xhci_dbc_tty_init_port()
393 	INIT_LIST_HEAD(&port->read_pool);  in xhci_dbc_tty_init_port()
394 	INIT_LIST_HEAD(&port->read_queue);  in xhci_dbc_tty_init_port()
395 	INIT_LIST_HEAD(&port->write_pool);  in xhci_dbc_tty_init_port()
397 	port->port.ops =	&dbc_port_ops;  in xhci_dbc_tty_init_port()
398 	port->n_read =		0;  in xhci_dbc_tty_init_port()
402 xhci_dbc_tty_exit_port(struct dbc_port *port)  in xhci_dbc_tty_exit_port()  argument
404 	tasklet_kill(&port->push);  in xhci_dbc_tty_exit_port()
405 	tty_port_destroy(&port->port);  in xhci_dbc_tty_exit_port()
412 	struct dbc_port		*port = dbc_to_port(dbc);  in xhci_dbc_tty_register_device()  local
414 	if (port->registered)  in xhci_dbc_tty_register_device()
417 	xhci_dbc_tty_init_port(dbc, port);  in xhci_dbc_tty_register_device()
420 	port->minor = idr_alloc(&dbc_tty_minors, port, 0, 64, GFP_KERNEL);  in xhci_dbc_tty_register_device()
423 	if (port->minor < 0) {  in xhci_dbc_tty_register_device()
424 		ret = port->minor;  in xhci_dbc_tty_register_device()
428 	ret = kfifo_alloc(&port->write_fifo, DBC_WRITE_BUF_SIZE, GFP_KERNEL);  in xhci_dbc_tty_register_device()
432 	ret = xhci_dbc_alloc_requests(dbc, BULK_IN, &port->read_pool,  in xhci_dbc_tty_register_device()
437 	ret = xhci_dbc_alloc_requests(dbc, BULK_OUT, &port->write_pool,  in xhci_dbc_tty_register_device()
442 	tty_dev = tty_port_register_device(&port->port,  in xhci_dbc_tty_register_device()
443 					   dbc_tty_driver, port->minor, NULL);  in xhci_dbc_tty_register_device()
449 	port->registered = true;  in xhci_dbc_tty_register_device()
454 	xhci_dbc_free_requests(&port->read_pool);  in xhci_dbc_tty_register_device()
455 	xhci_dbc_free_requests(&port->write_pool);  in xhci_dbc_tty_register_device()
457 	kfifo_free(&port->write_fifo);  in xhci_dbc_tty_register_device()
459 	idr_remove(&dbc_tty_minors, port->minor);  in xhci_dbc_tty_register_device()
461 	xhci_dbc_tty_exit_port(port);  in xhci_dbc_tty_register_device()
463 	dev_err(dbc->dev, "can't register tty port, err %d\n", ret);  in xhci_dbc_tty_register_device()
470 	struct dbc_port		*port = dbc_to_port(dbc);  in xhci_dbc_tty_unregister_device()  local
472 	if (!port->registered)  in xhci_dbc_tty_unregister_device()
474 	tty_unregister_device(dbc_tty_driver, port->minor);  in xhci_dbc_tty_unregister_device()
475 	xhci_dbc_tty_exit_port(port);  in xhci_dbc_tty_unregister_device()
476 	port->registered = false;  in xhci_dbc_tty_unregister_device()
479 	idr_remove(&dbc_tty_minors, port->minor);  in xhci_dbc_tty_unregister_device()
482 	kfifo_free(&port->write_fifo);  in xhci_dbc_tty_unregister_device()
483 	xhci_dbc_free_requests(&port->read_pool);  in xhci_dbc_tty_unregister_device()
484 	xhci_dbc_free_requests(&port->read_queue);  in xhci_dbc_tty_unregister_device()
485 	xhci_dbc_free_requests(&port->write_pool);  in xhci_dbc_tty_unregister_device()
496 	struct dbc_port		*port;  in xhci_dbc_tty_probe()  local
502 	port = kzalloc(sizeof(*port), GFP_KERNEL);  in xhci_dbc_tty_probe()
503 	if (!port)  in xhci_dbc_tty_probe()
513 	dbc->priv = port;  in xhci_dbc_tty_probe()
520 	kfree(port);  in xhci_dbc_tty_probe()
531 	struct dbc_port         *port = dbc_to_port(dbc);  in xhci_dbc_tty_remove()  local
534 	kfree(port);  in xhci_dbc_tty_remove()