106 int usb_serial_generic_open(struct tty_struct *tty, struct usb_serial_port *port)  in usb_serial_generic_open()  argument
110 	clear_bit(USB_SERIAL_THROTTLED, &port->flags);  in usb_serial_generic_open()
112 	if (port->bulk_in_size)  in usb_serial_generic_open()
113 		result = usb_serial_generic_submit_read_urbs(port, GFP_KERNEL);  in usb_serial_generic_open()
119 void usb_serial_generic_close(struct usb_serial_port *port)  in usb_serial_generic_close()  argument
124 	if (port->bulk_out_size) {  in usb_serial_generic_close()
125 		for (i = 0; i < ARRAY_SIZE(port->write_urbs); ++i)  in usb_serial_generic_close()
126 			usb_kill_urb(port->write_urbs[i]);  in usb_serial_generic_close()
128 		spin_lock_irqsave(&port->lock, flags);  in usb_serial_generic_close()
129 		kfifo_reset_out(&port->write_fifo);  in usb_serial_generic_close()
130 		spin_unlock_irqrestore(&port->lock, flags);  in usb_serial_generic_close()
132 	if (port->bulk_in_size) {  in usb_serial_generic_close()
133 		for (i = 0; i < ARRAY_SIZE(port->read_urbs); ++i)  in usb_serial_generic_close()
134 			usb_kill_urb(port->read_urbs[i]);  in usb_serial_generic_close()
139 int usb_serial_generic_prepare_write_buffer(struct usb_serial_port *port,  in usb_serial_generic_prepare_write_buffer()  argument
142 	return kfifo_out_locked(&port->write_fifo, dest, size, &port->lock);  in usb_serial_generic_prepare_write_buffer()
154 int usb_serial_generic_write_start(struct usb_serial_port *port,  in usb_serial_generic_write_start()  argument
162 	if (test_and_set_bit_lock(USB_SERIAL_WRITE_BUSY, &port->flags))  in usb_serial_generic_write_start()
165 	spin_lock_irqsave(&port->lock, flags);  in usb_serial_generic_write_start()
166 	if (!port->write_urbs_free || !kfifo_len(&port->write_fifo)) {  in usb_serial_generic_write_start()
167 		clear_bit_unlock(USB_SERIAL_WRITE_BUSY, &port->flags);  in usb_serial_generic_write_start()
168 		spin_unlock_irqrestore(&port->lock, flags);  in usb_serial_generic_write_start()
171 	i = (int)find_first_bit(&port->write_urbs_free,  in usb_serial_generic_write_start()
172 						ARRAY_SIZE(port->write_urbs));  in usb_serial_generic_write_start()
173 	spin_unlock_irqrestore(&port->lock, flags);  in usb_serial_generic_write_start()
175 	urb = port->write_urbs[i];  in usb_serial_generic_write_start()
176 	count = port->serial->type->prepare_write_buffer(port,  in usb_serial_generic_write_start()
178 						port->bulk_out_size);  in usb_serial_generic_write_start()
180 	usb_serial_debug_data(&port->dev, __func__, count, urb->transfer_buffer);  in usb_serial_generic_write_start()
181 	spin_lock_irqsave(&port->lock, flags);  in usb_serial_generic_write_start()
182 	port->tx_bytes += count;  in usb_serial_generic_write_start()
183 	spin_unlock_irqrestore(&port->lock, flags);  in usb_serial_generic_write_start()
185 	clear_bit(i, &port->write_urbs_free);  in usb_serial_generic_write_start()
188 		dev_err_console(port, "%s - error submitting urb: %d\n",  in usb_serial_generic_write_start()
190 		set_bit(i, &port->write_urbs_free);  in usb_serial_generic_write_start()
191 		spin_lock_irqsave(&port->lock, flags);  in usb_serial_generic_write_start()
192 		port->tx_bytes -= count;  in usb_serial_generic_write_start()
193 		spin_unlock_irqrestore(&port->lock, flags);  in usb_serial_generic_write_start()
195 		clear_bit_unlock(USB_SERIAL_WRITE_BUSY, &port->flags);  in usb_serial_generic_write_start()
214 	struct usb_serial_port *port, const unsigned char *buf, int count)  in usb_serial_generic_write()  argument
218 	if (!port->bulk_out_size)  in usb_serial_generic_write()
224 	count = kfifo_in_locked(&port->write_fifo, buf, count, &port->lock);  in usb_serial_generic_write()
225 	result = usb_serial_generic_write_start(port, GFP_ATOMIC);  in usb_serial_generic_write()
235 	struct usb_serial_port *port = tty->driver_data;  in usb_serial_generic_write_room()  local
239 	if (!port->bulk_out_size)  in usb_serial_generic_write_room()
242 	spin_lock_irqsave(&port->lock, flags);  in usb_serial_generic_write_room()
243 	room = kfifo_avail(&port->write_fifo);  in usb_serial_generic_write_room()
244 	spin_unlock_irqrestore(&port->lock, flags);  in usb_serial_generic_write_room()
246 	dev_dbg(&port->dev, "%s - returns %u\n", __func__, room);  in usb_serial_generic_write_room()
252 	struct usb_serial_port *port = tty->driver_data;  in usb_serial_generic_chars_in_buffer()  local
256 	if (!port->bulk_out_size)  in usb_serial_generic_chars_in_buffer()
259 	spin_lock_irqsave(&port->lock, flags);  in usb_serial_generic_chars_in_buffer()
260 	chars = kfifo_len(&port->write_fifo) + port->tx_bytes;  in usb_serial_generic_chars_in_buffer()
261 	spin_unlock_irqrestore(&port->lock, flags);  in usb_serial_generic_chars_in_buffer()
263 	dev_dbg(&port->dev, "%s - returns %u\n", __func__, chars);  in usb_serial_generic_chars_in_buffer()
270 	struct usb_serial_port *port = tty->driver_data;  in usb_serial_generic_wait_until_sent()  local
286 	dev_dbg(&port->dev, "%s - timeout = %u ms, period = %u ms\n",  in usb_serial_generic_wait_until_sent()
290 	while (!port->serial->type->tx_empty(port)) {  in usb_serial_generic_wait_until_sent()
300 static int usb_serial_generic_submit_read_urb(struct usb_serial_port *port,  in usb_serial_generic_submit_read_urb()  argument
305 	if (!test_and_clear_bit(index, &port->read_urbs_free))  in usb_serial_generic_submit_read_urb()
308 	dev_dbg(&port->dev, "%s - urb %d\n", __func__, index);  in usb_serial_generic_submit_read_urb()
310 	res = usb_submit_urb(port->read_urbs[index], mem_flags);  in usb_serial_generic_submit_read_urb()
313 			dev_err(&port->dev,  in usb_serial_generic_submit_read_urb()
317 		set_bit(index, &port->read_urbs_free);  in usb_serial_generic_submit_read_urb()
324 int usb_serial_generic_submit_read_urbs(struct usb_serial_port *port,  in usb_serial_generic_submit_read_urbs()  argument
330 	for (i = 0; i < ARRAY_SIZE(port->read_urbs); ++i) {  in usb_serial_generic_submit_read_urbs()
331 		res = usb_serial_generic_submit_read_urb(port, i, mem_flags);  in usb_serial_generic_submit_read_urbs()
339 		usb_kill_urb(port->read_urbs[i]);  in usb_serial_generic_submit_read_urbs()
347 	struct usb_serial_port *port = urb->context;  in usb_serial_generic_process_read_urb()  local
358 	if (port->sysrq) {  in usb_serial_generic_process_read_urb()
360 			if (!usb_serial_handle_sysrq_char(port, *ch))  in usb_serial_generic_process_read_urb()
361 				tty_insert_flip_char(&port->port, *ch, TTY_NORMAL);  in usb_serial_generic_process_read_urb()
364 		tty_insert_flip_string(&port->port, ch, urb->actual_length);  in usb_serial_generic_process_read_urb()
366 	tty_flip_buffer_push(&port->port);  in usb_serial_generic_process_read_urb()
372 	struct usb_serial_port *port = urb->context;  in usb_serial_generic_read_bulk_callback()  local
378 	for (i = 0; i < ARRAY_SIZE(port->read_urbs); ++i) {  in usb_serial_generic_read_bulk_callback()
379 		if (urb == port->read_urbs[i])  in usb_serial_generic_read_bulk_callback()
383 	dev_dbg(&port->dev, "%s - urb %d, len %d\n", __func__, i,  in usb_serial_generic_read_bulk_callback()
387 		usb_serial_debug_data(&port->dev, __func__, urb->actual_length,  in usb_serial_generic_read_bulk_callback()
389 		port->serial->type->process_read_urb(urb);  in usb_serial_generic_read_bulk_callback()
394 		dev_dbg(&port->dev, "%s - urb stopped: %d\n",  in usb_serial_generic_read_bulk_callback()
399 		dev_err(&port->dev, "%s - urb stopped: %d\n",  in usb_serial_generic_read_bulk_callback()
404 		dev_dbg(&port->dev, "%s - nonzero urb status: %d\n",  in usb_serial_generic_read_bulk_callback()
416 	set_bit(i, &port->read_urbs_free);  in usb_serial_generic_read_bulk_callback()
427 	if (test_bit(USB_SERIAL_THROTTLED, &port->flags))  in usb_serial_generic_read_bulk_callback()
430 	usb_serial_generic_submit_read_urb(port, i, GFP_ATOMIC);  in usb_serial_generic_read_bulk_callback()
437 	struct usb_serial_port *port = urb->context;  in usb_serial_generic_write_bulk_callback()  local
441 	for (i = 0; i < ARRAY_SIZE(port->write_urbs); ++i) {  in usb_serial_generic_write_bulk_callback()
442 		if (port->write_urbs[i] == urb)  in usb_serial_generic_write_bulk_callback()
445 	spin_lock_irqsave(&port->lock, flags);  in usb_serial_generic_write_bulk_callback()
446 	port->tx_bytes -= urb->transfer_buffer_length;  in usb_serial_generic_write_bulk_callback()
447 	set_bit(i, &port->write_urbs_free);  in usb_serial_generic_write_bulk_callback()
448 	spin_unlock_irqrestore(&port->lock, flags);  in usb_serial_generic_write_bulk_callback()
456 		dev_dbg(&port->dev, "%s - urb stopped: %d\n",  in usb_serial_generic_write_bulk_callback()
460 		dev_err_console(port, "%s - urb stopped: %d\n",  in usb_serial_generic_write_bulk_callback()
464 		dev_err_console(port, "%s - nonzero urb status: %d\n",  in usb_serial_generic_write_bulk_callback()
469 	usb_serial_generic_write_start(port, GFP_ATOMIC);  in usb_serial_generic_write_bulk_callback()
470 	usb_serial_port_softint(port);  in usb_serial_generic_write_bulk_callback()
476 	struct usb_serial_port *port = tty->driver_data;  in usb_serial_generic_throttle()  local
478 	set_bit(USB_SERIAL_THROTTLED, &port->flags);  in usb_serial_generic_throttle()
484 	struct usb_serial_port *port = tty->driver_data;  in usb_serial_generic_unthrottle()  local
486 	clear_bit(USB_SERIAL_THROTTLED, &port->flags);  in usb_serial_generic_unthrottle()
494 	usb_serial_generic_submit_read_urbs(port, GFP_KERNEL);  in usb_serial_generic_unthrottle()
501 	struct usb_serial_port *port = tty->driver_data;  in usb_serial_generic_msr_changed()  local
510 	if (!tty_port_initialized(&port->port))  in usb_serial_generic_msr_changed()
513 	spin_lock_irqsave(&port->lock, flags);  in usb_serial_generic_msr_changed()
514 	cnow = port->icount;				/* atomic copy*/  in usb_serial_generic_msr_changed()
515 	spin_unlock_irqrestore(&port->lock, flags);  in usb_serial_generic_msr_changed()
529 	struct usb_serial_port *port = tty->driver_data;  in usb_serial_generic_tiocmiwait()  local
534 	spin_lock_irqsave(&port->lock, flags);  in usb_serial_generic_tiocmiwait()
535 	cnow = port->icount;				/* atomic copy */  in usb_serial_generic_tiocmiwait()
536 	spin_unlock_irqrestore(&port->lock, flags);  in usb_serial_generic_tiocmiwait()
538 	ret = wait_event_interruptible(port->port.delta_msr_wait,  in usb_serial_generic_tiocmiwait()
540 	if (!ret && !tty_port_initialized(&port->port))  in usb_serial_generic_tiocmiwait()
550 	struct usb_serial_port *port = tty->driver_data;  in usb_serial_generic_get_icount()  local
554 	spin_lock_irqsave(&port->lock, flags);  in usb_serial_generic_get_icount()
555 	cnow = port->icount;				/* atomic copy */  in usb_serial_generic_get_icount()
556 	spin_unlock_irqrestore(&port->lock, flags);  in usb_serial_generic_get_icount()
575 int usb_serial_handle_sysrq_char(struct usb_serial_port *port, unsigned int ch)  in usb_serial_handle_sysrq_char()  argument
577 	if (port->sysrq) {  in usb_serial_handle_sysrq_char()
578 		if (ch && time_before(jiffies, port->sysrq)) {  in usb_serial_handle_sysrq_char()
580 			port->sysrq = 0;  in usb_serial_handle_sysrq_char()
583 		port->sysrq = 0;  in usb_serial_handle_sysrq_char()
589 int usb_serial_handle_break(struct usb_serial_port *port)  in usb_serial_handle_break()  argument
591 	if (!port->port.console)  in usb_serial_handle_break()
594 	if (!port->sysrq) {  in usb_serial_handle_break()
595 		port->sysrq = jiffies + HZ*5;  in usb_serial_handle_break()
598 	port->sysrq = 0;  in usb_serial_handle_break()
610 void usb_serial_handle_dcd_change(struct usb_serial_port *port,  in usb_serial_handle_dcd_change()  argument
613 	dev_dbg(&port->dev, "%s - status %d\n", __func__, status);  in usb_serial_handle_dcd_change()
626 		wake_up_interruptible(&port->port.open_wait);  in usb_serial_handle_dcd_change()
634 	struct usb_serial_port *port;  in usb_serial_generic_resume()  local
638 		port = serial->port[i];  in usb_serial_generic_resume()
639 		if (!tty_port_initialized(&port->port))  in usb_serial_generic_resume()
642 		if (port->bulk_in_size) {  in usb_serial_generic_resume()
643 			r = usb_serial_generic_submit_read_urbs(port,  in usb_serial_generic_resume()
649 		if (port->bulk_out_size) {  in usb_serial_generic_resume()
650 			r = usb_serial_generic_write_start(port, GFP_NOIO);  in usb_serial_generic_resume()