80 int usb_serial_generic_open(struct tty_struct *tty, struct usb_serial_port *port)  in usb_serial_generic_open()  argument
85 	spin_lock_irqsave(&port->lock, flags);  in usb_serial_generic_open()
86 	port->throttled = 0;  in usb_serial_generic_open()
87 	port->throttle_req = 0;  in usb_serial_generic_open()
88 	spin_unlock_irqrestore(&port->lock, flags);  in usb_serial_generic_open()
90 	if (port->bulk_in_size)  in usb_serial_generic_open()
91 		result = usb_serial_generic_submit_read_urbs(port, GFP_KERNEL);  in usb_serial_generic_open()
97 void usb_serial_generic_close(struct usb_serial_port *port)  in usb_serial_generic_close()  argument
102 	if (port->bulk_out_size) {  in usb_serial_generic_close()
103 		for (i = 0; i < ARRAY_SIZE(port->write_urbs); ++i)  in usb_serial_generic_close()
104 			usb_kill_urb(port->write_urbs[i]);  in usb_serial_generic_close()
106 		spin_lock_irqsave(&port->lock, flags);  in usb_serial_generic_close()
107 		kfifo_reset_out(&port->write_fifo);  in usb_serial_generic_close()
108 		spin_unlock_irqrestore(&port->lock, flags);  in usb_serial_generic_close()
110 	if (port->bulk_in_size) {  in usb_serial_generic_close()
111 		for (i = 0; i < ARRAY_SIZE(port->read_urbs); ++i)  in usb_serial_generic_close()
112 			usb_kill_urb(port->read_urbs[i]);  in usb_serial_generic_close()
117 int usb_serial_generic_prepare_write_buffer(struct usb_serial_port *port,  in usb_serial_generic_prepare_write_buffer()  argument
120 	return kfifo_out_locked(&port->write_fifo, dest, size, &port->lock);  in usb_serial_generic_prepare_write_buffer()
132 int usb_serial_generic_write_start(struct usb_serial_port *port,  in usb_serial_generic_write_start()  argument
140 	if (test_and_set_bit_lock(USB_SERIAL_WRITE_BUSY, &port->flags))  in usb_serial_generic_write_start()
143 	spin_lock_irqsave(&port->lock, flags);  in usb_serial_generic_write_start()
144 	if (!port->write_urbs_free || !kfifo_len(&port->write_fifo)) {  in usb_serial_generic_write_start()
145 		clear_bit_unlock(USB_SERIAL_WRITE_BUSY, &port->flags);  in usb_serial_generic_write_start()
146 		spin_unlock_irqrestore(&port->lock, flags);  in usb_serial_generic_write_start()
149 	i = (int)find_first_bit(&port->write_urbs_free,  in usb_serial_generic_write_start()
150 						ARRAY_SIZE(port->write_urbs));  in usb_serial_generic_write_start()
151 	spin_unlock_irqrestore(&port->lock, flags);  in usb_serial_generic_write_start()
153 	urb = port->write_urbs[i];  in usb_serial_generic_write_start()
154 	count = port->serial->type->prepare_write_buffer(port,  in usb_serial_generic_write_start()
156 						port->bulk_out_size);  in usb_serial_generic_write_start()
158 	usb_serial_debug_data(&port->dev, __func__, count, urb->transfer_buffer);  in usb_serial_generic_write_start()
159 	spin_lock_irqsave(&port->lock, flags);  in usb_serial_generic_write_start()
160 	port->tx_bytes += count;  in usb_serial_generic_write_start()
161 	spin_unlock_irqrestore(&port->lock, flags);  in usb_serial_generic_write_start()
163 	clear_bit(i, &port->write_urbs_free);  in usb_serial_generic_write_start()
166 		dev_err_console(port, "%s - error submitting urb: %d\n",  in usb_serial_generic_write_start()
168 		set_bit(i, &port->write_urbs_free);  in usb_serial_generic_write_start()
169 		spin_lock_irqsave(&port->lock, flags);  in usb_serial_generic_write_start()
170 		port->tx_bytes -= count;  in usb_serial_generic_write_start()
171 		spin_unlock_irqrestore(&port->lock, flags);  in usb_serial_generic_write_start()
173 		clear_bit_unlock(USB_SERIAL_WRITE_BUSY, &port->flags);  in usb_serial_generic_write_start()
192 	struct usb_serial_port *port, const unsigned char *buf, int count)  in usb_serial_generic_write()  argument
196 	if (!port->bulk_out_size)  in usb_serial_generic_write()
202 	count = kfifo_in_locked(&port->write_fifo, buf, count, &port->lock);  in usb_serial_generic_write()
203 	result = usb_serial_generic_write_start(port, GFP_ATOMIC);  in usb_serial_generic_write()
213 	struct usb_serial_port *port = tty->driver_data;  in usb_serial_generic_write_room()  local
217 	if (!port->bulk_out_size)  in usb_serial_generic_write_room()
220 	spin_lock_irqsave(&port->lock, flags);  in usb_serial_generic_write_room()
221 	room = kfifo_avail(&port->write_fifo);  in usb_serial_generic_write_room()
222 	spin_unlock_irqrestore(&port->lock, flags);  in usb_serial_generic_write_room()
224 	dev_dbg(&port->dev, "%s - returns %d\n", __func__, room);  in usb_serial_generic_write_room()
230 	struct usb_serial_port *port = tty->driver_data;  in usb_serial_generic_chars_in_buffer()  local
234 	if (!port->bulk_out_size)  in usb_serial_generic_chars_in_buffer()
237 	spin_lock_irqsave(&port->lock, flags);  in usb_serial_generic_chars_in_buffer()
238 	chars = kfifo_len(&port->write_fifo) + port->tx_bytes;  in usb_serial_generic_chars_in_buffer()
239 	spin_unlock_irqrestore(&port->lock, flags);  in usb_serial_generic_chars_in_buffer()
241 	dev_dbg(&port->dev, "%s - returns %d\n", __func__, chars);  in usb_serial_generic_chars_in_buffer()
248 	struct usb_serial_port *port = tty->driver_data;  in usb_serial_generic_wait_until_sent()  local
264 	dev_dbg(&port->dev, "%s - timeout = %u ms, period = %u ms\n",  in usb_serial_generic_wait_until_sent()
268 	while (!port->serial->type->tx_empty(port)) {  in usb_serial_generic_wait_until_sent()
278 static int usb_serial_generic_submit_read_urb(struct usb_serial_port *port,  in usb_serial_generic_submit_read_urb()  argument
283 	if (!test_and_clear_bit(index, &port->read_urbs_free))  in usb_serial_generic_submit_read_urb()
286 	dev_dbg(&port->dev, "%s - urb %d\n", __func__, index);  in usb_serial_generic_submit_read_urb()
288 	res = usb_submit_urb(port->read_urbs[index], mem_flags);  in usb_serial_generic_submit_read_urb()
291 			dev_err(&port->dev,  in usb_serial_generic_submit_read_urb()
295 		set_bit(index, &port->read_urbs_free);  in usb_serial_generic_submit_read_urb()
302 int usb_serial_generic_submit_read_urbs(struct usb_serial_port *port,  in usb_serial_generic_submit_read_urbs()  argument
308 	for (i = 0; i < ARRAY_SIZE(port->read_urbs); ++i) {  in usb_serial_generic_submit_read_urbs()
309 		res = usb_serial_generic_submit_read_urb(port, i, mem_flags);  in usb_serial_generic_submit_read_urbs()
317 		usb_kill_urb(port->read_urbs[i]);  in usb_serial_generic_submit_read_urbs()
325 	struct usb_serial_port *port = urb->context;  in usb_serial_generic_process_read_urb()  local
336 	if (!port->port.console || !port->sysrq) {  in usb_serial_generic_process_read_urb()
337 		tty_insert_flip_string(&port->port, ch, urb->actual_length);  in usb_serial_generic_process_read_urb()
340 			if (!usb_serial_handle_sysrq_char(port, *ch))  in usb_serial_generic_process_read_urb()
341 				tty_insert_flip_char(&port->port, *ch, TTY_NORMAL);  in usb_serial_generic_process_read_urb()
344 	tty_flip_buffer_push(&port->port);  in usb_serial_generic_process_read_urb()
350 	struct usb_serial_port *port = urb->context;  in usb_serial_generic_read_bulk_callback()  local
357 	for (i = 0; i < ARRAY_SIZE(port->read_urbs); ++i) {  in usb_serial_generic_read_bulk_callback()
358 		if (urb == port->read_urbs[i])  in usb_serial_generic_read_bulk_callback()
362 	dev_dbg(&port->dev, "%s - urb %d, len %d\n", __func__, i,  in usb_serial_generic_read_bulk_callback()
366 		usb_serial_debug_data(&port->dev, __func__, urb->actual_length,  in usb_serial_generic_read_bulk_callback()
368 		port->serial->type->process_read_urb(urb);  in usb_serial_generic_read_bulk_callback()
373 		dev_dbg(&port->dev, "%s - urb stopped: %d\n",  in usb_serial_generic_read_bulk_callback()
378 		dev_err(&port->dev, "%s - urb stopped: %d\n",  in usb_serial_generic_read_bulk_callback()
383 		dev_dbg(&port->dev, "%s - nonzero urb status: %d\n",  in usb_serial_generic_read_bulk_callback()
395 	set_bit(i, &port->read_urbs_free);  in usb_serial_generic_read_bulk_callback()
407 	spin_lock_irqsave(&port->lock, flags);  in usb_serial_generic_read_bulk_callback()
408 	port->throttled = port->throttle_req;  in usb_serial_generic_read_bulk_callback()
409 	if (!port->throttled) {  in usb_serial_generic_read_bulk_callback()
410 		spin_unlock_irqrestore(&port->lock, flags);  in usb_serial_generic_read_bulk_callback()
411 		usb_serial_generic_submit_read_urb(port, i, GFP_ATOMIC);  in usb_serial_generic_read_bulk_callback()
413 		spin_unlock_irqrestore(&port->lock, flags);  in usb_serial_generic_read_bulk_callback()
421 	struct usb_serial_port *port = urb->context;  in usb_serial_generic_write_bulk_callback()  local
425 	for (i = 0; i < ARRAY_SIZE(port->write_urbs); ++i) {  in usb_serial_generic_write_bulk_callback()
426 		if (port->write_urbs[i] == urb)  in usb_serial_generic_write_bulk_callback()
429 	spin_lock_irqsave(&port->lock, flags);  in usb_serial_generic_write_bulk_callback()
430 	port->tx_bytes -= urb->transfer_buffer_length;  in usb_serial_generic_write_bulk_callback()
431 	set_bit(i, &port->write_urbs_free);  in usb_serial_generic_write_bulk_callback()
432 	spin_unlock_irqrestore(&port->lock, flags);  in usb_serial_generic_write_bulk_callback()
440 		dev_dbg(&port->dev, "%s - urb stopped: %d\n",  in usb_serial_generic_write_bulk_callback()
444 		dev_err_console(port, "%s - urb stopped: %d\n",  in usb_serial_generic_write_bulk_callback()
448 		dev_err_console(port, "%s - nonzero urb status: %d\n",  in usb_serial_generic_write_bulk_callback()
454 	usb_serial_generic_write_start(port, GFP_ATOMIC);  in usb_serial_generic_write_bulk_callback()
455 	usb_serial_port_softint(port);  in usb_serial_generic_write_bulk_callback()
461 	struct usb_serial_port *port = tty->driver_data;  in usb_serial_generic_throttle()  local
464 	spin_lock_irqsave(&port->lock, flags);  in usb_serial_generic_throttle()
465 	port->throttle_req = 1;  in usb_serial_generic_throttle()
466 	spin_unlock_irqrestore(&port->lock, flags);  in usb_serial_generic_throttle()
472 	struct usb_serial_port *port = tty->driver_data;  in usb_serial_generic_unthrottle()  local
475 	spin_lock_irq(&port->lock);  in usb_serial_generic_unthrottle()
476 	was_throttled = port->throttled;  in usb_serial_generic_unthrottle()
477 	port->throttled = port->throttle_req = 0;  in usb_serial_generic_unthrottle()
478 	spin_unlock_irq(&port->lock);  in usb_serial_generic_unthrottle()
487 		usb_serial_generic_submit_read_urbs(port, GFP_KERNEL);  in usb_serial_generic_unthrottle()
494 	struct usb_serial_port *port = tty->driver_data;  in usb_serial_generic_msr_changed()  local
503 	if (!test_bit(ASYNCB_INITIALIZED, &port->port.flags))  in usb_serial_generic_msr_changed()
506 	spin_lock_irqsave(&port->lock, flags);  in usb_serial_generic_msr_changed()
507 	cnow = port->icount;				/* atomic copy*/  in usb_serial_generic_msr_changed()
508 	spin_unlock_irqrestore(&port->lock, flags);  in usb_serial_generic_msr_changed()
522 	struct usb_serial_port *port = tty->driver_data;  in usb_serial_generic_tiocmiwait()  local
527 	spin_lock_irqsave(&port->lock, flags);  in usb_serial_generic_tiocmiwait()
528 	cnow = port->icount;				/* atomic copy */  in usb_serial_generic_tiocmiwait()
529 	spin_unlock_irqrestore(&port->lock, flags);  in usb_serial_generic_tiocmiwait()
531 	ret = wait_event_interruptible(port->port.delta_msr_wait,  in usb_serial_generic_tiocmiwait()
533 	if (!ret && !test_bit(ASYNCB_INITIALIZED, &port->port.flags))  in usb_serial_generic_tiocmiwait()
543 	struct usb_serial_port *port = tty->driver_data;  in usb_serial_generic_get_icount()  local
547 	spin_lock_irqsave(&port->lock, flags);  in usb_serial_generic_get_icount()
548 	cnow = port->icount;				/* atomic copy */  in usb_serial_generic_get_icount()
549 	spin_unlock_irqrestore(&port->lock, flags);  in usb_serial_generic_get_icount()
568 int usb_serial_handle_sysrq_char(struct usb_serial_port *port, unsigned int ch)  in usb_serial_handle_sysrq_char()  argument
570 	if (port->sysrq && port->port.console) {  in usb_serial_handle_sysrq_char()
571 		if (ch && time_before(jiffies, port->sysrq)) {  in usb_serial_handle_sysrq_char()
573 			port->sysrq = 0;  in usb_serial_handle_sysrq_char()
576 		port->sysrq = 0;  in usb_serial_handle_sysrq_char()
581 int usb_serial_handle_sysrq_char(struct usb_serial_port *port, unsigned int ch)  in usb_serial_handle_sysrq_char()  argument
588 int usb_serial_handle_break(struct usb_serial_port *port)  in usb_serial_handle_break()  argument
590 	if (!port->sysrq) {  in usb_serial_handle_break()
591 		port->sysrq = jiffies + HZ*5;  in usb_serial_handle_break()
594 	port->sysrq = 0;  in usb_serial_handle_break()
608 	struct tty_port *port = &usb_port->port;  in usb_serial_handle_dcd_change()  local
623 		wake_up_interruptible(&port->open_wait);  in usb_serial_handle_dcd_change()
631 	struct usb_serial_port *port;  in usb_serial_generic_resume()  local
635 		port = serial->port[i];  in usb_serial_generic_resume()
636 		if (!test_bit(ASYNCB_INITIALIZED, &port->port.flags))  in usb_serial_generic_resume()
639 		if (port->bulk_in_size) {  in usb_serial_generic_resume()
640 			r = usb_serial_generic_submit_read_urbs(port,  in usb_serial_generic_resume()
646 		if (port->bulk_out_size) {  in usb_serial_generic_resume()
647 			r = usb_serial_generic_write_start(port, GFP_NOIO);  in usb_serial_generic_resume()