105 int usb_serial_generic_open(struct tty_struct *tty, struct usb_serial_port *port)  in usb_serial_generic_open()  argument
109 	clear_bit(USB_SERIAL_THROTTLED, &port->flags);  in usb_serial_generic_open()
111 	if (port->bulk_in_size)  in usb_serial_generic_open()
112 		result = usb_serial_generic_submit_read_urbs(port, GFP_KERNEL);  in usb_serial_generic_open()
118 void usb_serial_generic_close(struct usb_serial_port *port)  in usb_serial_generic_close()  argument
123 	if (port->bulk_out_size) {  in usb_serial_generic_close()
124 		for (i = 0; i < ARRAY_SIZE(port->write_urbs); ++i)  in usb_serial_generic_close()
125 			usb_kill_urb(port->write_urbs[i]);  in usb_serial_generic_close()
127 		spin_lock_irqsave(&port->lock, flags);  in usb_serial_generic_close()
128 		kfifo_reset_out(&port->write_fifo);  in usb_serial_generic_close()
129 		spin_unlock_irqrestore(&port->lock, flags);  in usb_serial_generic_close()
131 	if (port->bulk_in_size) {  in usb_serial_generic_close()
132 		for (i = 0; i < ARRAY_SIZE(port->read_urbs); ++i)  in usb_serial_generic_close()
133 			usb_kill_urb(port->read_urbs[i]);  in usb_serial_generic_close()
138 int usb_serial_generic_prepare_write_buffer(struct usb_serial_port *port,  in usb_serial_generic_prepare_write_buffer()  argument
141 	return kfifo_out_locked(&port->write_fifo, dest, size, &port->lock);  in usb_serial_generic_prepare_write_buffer()
146  * @port: usb-serial port
153 int usb_serial_generic_write_start(struct usb_serial_port *port,  in usb_serial_generic_write_start()  argument
161 	if (test_and_set_bit_lock(USB_SERIAL_WRITE_BUSY, &port->flags))  in usb_serial_generic_write_start()
164 	spin_lock_irqsave(&port->lock, flags);  in usb_serial_generic_write_start()
165 	if (!port->write_urbs_free || !kfifo_len(&port->write_fifo)) {  in usb_serial_generic_write_start()
166 		clear_bit_unlock(USB_SERIAL_WRITE_BUSY, &port->flags);  in usb_serial_generic_write_start()
167 		spin_unlock_irqrestore(&port->lock, flags);  in usb_serial_generic_write_start()
170 	i = (int)find_first_bit(&port->write_urbs_free,  in usb_serial_generic_write_start()
171 						ARRAY_SIZE(port->write_urbs));  in usb_serial_generic_write_start()
172 	spin_unlock_irqrestore(&port->lock, flags);  in usb_serial_generic_write_start()
174 	urb = port->write_urbs[i];  in usb_serial_generic_write_start()
175 	count = port->serial->type->prepare_write_buffer(port,  in usb_serial_generic_write_start()
177 						port->bulk_out_size);  in usb_serial_generic_write_start()
179 	usb_serial_debug_data(&port->dev, __func__, count, urb->transfer_buffer);  in usb_serial_generic_write_start()
180 	spin_lock_irqsave(&port->lock, flags);  in usb_serial_generic_write_start()
181 	port->tx_bytes += count;  in usb_serial_generic_write_start()
182 	spin_unlock_irqrestore(&port->lock, flags);  in usb_serial_generic_write_start()
184 	clear_bit(i, &port->write_urbs_free);  in usb_serial_generic_write_start()
187 		dev_err_console(port, "%s - error submitting urb: %d\n",  in usb_serial_generic_write_start()
189 		set_bit(i, &port->write_urbs_free);  in usb_serial_generic_write_start()
190 		spin_lock_irqsave(&port->lock, flags);  in usb_serial_generic_write_start()
191 		port->tx_bytes -= count;  in usb_serial_generic_write_start()
192 		spin_unlock_irqrestore(&port->lock, flags);  in usb_serial_generic_write_start()
194 		clear_bit_unlock(USB_SERIAL_WRITE_BUSY, &port->flags);  in usb_serial_generic_write_start()
204  * @tty: tty for the port
205  * @port: usb-serial port
213 	struct usb_serial_port *port, const unsigned char *buf, int count)  in usb_serial_generic_write()  argument
217 	if (!port->bulk_out_size)  in usb_serial_generic_write()
223 	count = kfifo_in_locked(&port->write_fifo, buf, count, &port->lock);  in usb_serial_generic_write()
224 	result = usb_serial_generic_write_start(port, GFP_ATOMIC);  in usb_serial_generic_write()
234 	struct usb_serial_port *port = tty->driver_data;  in usb_serial_generic_write_room()  local
238 	if (!port->bulk_out_size)  in usb_serial_generic_write_room()
241 	spin_lock_irqsave(&port->lock, flags);  in usb_serial_generic_write_room()
242 	room = kfifo_avail(&port->write_fifo);  in usb_serial_generic_write_room()
243 	spin_unlock_irqrestore(&port->lock, flags);  in usb_serial_generic_write_room()
245 	dev_dbg(&port->dev, "%s - returns %u\n", __func__, room);  in usb_serial_generic_write_room()
251 	struct usb_serial_port *port = tty->driver_data;  in usb_serial_generic_chars_in_buffer()  local
255 	if (!port->bulk_out_size)  in usb_serial_generic_chars_in_buffer()
258 	spin_lock_irqsave(&port->lock, flags);  in usb_serial_generic_chars_in_buffer()
259 	chars = kfifo_len(&port->write_fifo) + port->tx_bytes;  in usb_serial_generic_chars_in_buffer()
260 	spin_unlock_irqrestore(&port->lock, flags);  in usb_serial_generic_chars_in_buffer()
262 	dev_dbg(&port->dev, "%s - returns %u\n", __func__, chars);  in usb_serial_generic_chars_in_buffer()
269 	struct usb_serial_port *port = tty->driver_data;  in usb_serial_generic_wait_until_sent()  local
285 	dev_dbg(&port->dev, "%s - timeout = %u ms, period = %u ms\n",  in usb_serial_generic_wait_until_sent()
289 	while (!port->serial->type->tx_empty(port)) {  in usb_serial_generic_wait_until_sent()
299 static int usb_serial_generic_submit_read_urb(struct usb_serial_port *port,  in usb_serial_generic_submit_read_urb()  argument
304 	if (!test_and_clear_bit(index, &port->read_urbs_free))  in usb_serial_generic_submit_read_urb()
307 	dev_dbg(&port->dev, "%s - urb %d\n", __func__, index);  in usb_serial_generic_submit_read_urb()
309 	res = usb_submit_urb(port->read_urbs[index], mem_flags);  in usb_serial_generic_submit_read_urb()
312 			dev_err(&port->dev,  in usb_serial_generic_submit_read_urb()
316 		set_bit(index, &port->read_urbs_free);  in usb_serial_generic_submit_read_urb()
323 int usb_serial_generic_submit_read_urbs(struct usb_serial_port *port,  in usb_serial_generic_submit_read_urbs()  argument
329 	for (i = 0; i < ARRAY_SIZE(port->read_urbs); ++i) {  in usb_serial_generic_submit_read_urbs()
330 		res = usb_serial_generic_submit_read_urb(port, i, mem_flags);  in usb_serial_generic_submit_read_urbs()
338 		usb_kill_urb(port->read_urbs[i]);  in usb_serial_generic_submit_read_urbs()
346 	struct usb_serial_port *port = urb->context;  in usb_serial_generic_process_read_urb()  local
357 	if (port->sysrq) {  in usb_serial_generic_process_read_urb()
359 			if (!usb_serial_handle_sysrq_char(port, *ch))  in usb_serial_generic_process_read_urb()
360 				tty_insert_flip_char(&port->port, *ch, TTY_NORMAL);  in usb_serial_generic_process_read_urb()
363 		tty_insert_flip_string(&port->port, ch, urb->actual_length);  in usb_serial_generic_process_read_urb()
365 	tty_flip_buffer_push(&port->port);  in usb_serial_generic_process_read_urb()
371 	struct usb_serial_port *port = urb->context;  in usb_serial_generic_read_bulk_callback()  local
377 	for (i = 0; i < ARRAY_SIZE(port->read_urbs); ++i) {  in usb_serial_generic_read_bulk_callback()
378 		if (urb == port->read_urbs[i])  in usb_serial_generic_read_bulk_callback()
382 	dev_dbg(&port->dev, "%s - urb %d, len %d\n", __func__, i,  in usb_serial_generic_read_bulk_callback()
386 		usb_serial_debug_data(&port->dev, __func__, urb->actual_length,  in usb_serial_generic_read_bulk_callback()
388 		port->serial->type->process_read_urb(urb);  in usb_serial_generic_read_bulk_callback()
393 		dev_dbg(&port->dev, "%s - urb stopped: %d\n",  in usb_serial_generic_read_bulk_callback()
398 		dev_err(&port->dev, "%s - urb stopped: %d\n",  in usb_serial_generic_read_bulk_callback()
403 		dev_dbg(&port->dev, "%s - nonzero urb status: %d\n",  in usb_serial_generic_read_bulk_callback()
415 	set_bit(i, &port->read_urbs_free);  in usb_serial_generic_read_bulk_callback()
426 	if (test_bit(USB_SERIAL_THROTTLED, &port->flags))  in usb_serial_generic_read_bulk_callback()
429 	usb_serial_generic_submit_read_urb(port, i, GFP_ATOMIC);  in usb_serial_generic_read_bulk_callback()
436 	struct usb_serial_port *port = urb->context;  in usb_serial_generic_write_bulk_callback()  local
440 	for (i = 0; i < ARRAY_SIZE(port->write_urbs); ++i) {  in usb_serial_generic_write_bulk_callback()
441 		if (port->write_urbs[i] == urb)  in usb_serial_generic_write_bulk_callback()
444 	spin_lock_irqsave(&port->lock, flags);  in usb_serial_generic_write_bulk_callback()
445 	port->tx_bytes -= urb->transfer_buffer_length;  in usb_serial_generic_write_bulk_callback()
446 	set_bit(i, &port->write_urbs_free);  in usb_serial_generic_write_bulk_callback()
447 	spin_unlock_irqrestore(&port->lock, flags);  in usb_serial_generic_write_bulk_callback()
455 		dev_dbg(&port->dev, "%s - urb stopped: %d\n",  in usb_serial_generic_write_bulk_callback()
459 		dev_err_console(port, "%s - urb stopped: %d\n",  in usb_serial_generic_write_bulk_callback()
463 		dev_err_console(port, "%s - nonzero urb status: %d\n",  in usb_serial_generic_write_bulk_callback()
468 	usb_serial_generic_write_start(port, GFP_ATOMIC);  in usb_serial_generic_write_bulk_callback()
469 	usb_serial_port_softint(port);  in usb_serial_generic_write_bulk_callback()
475 	struct usb_serial_port *port = tty->driver_data;  in usb_serial_generic_throttle()  local
477 	set_bit(USB_SERIAL_THROTTLED, &port->flags);  in usb_serial_generic_throttle()
483 	struct usb_serial_port *port = tty->driver_data;  in usb_serial_generic_unthrottle()  local
485 	clear_bit(USB_SERIAL_THROTTLED, &port->flags);  in usb_serial_generic_unthrottle()
493 	usb_serial_generic_submit_read_urbs(port, GFP_KERNEL);  in usb_serial_generic_unthrottle()
500 	struct usb_serial_port *port = tty->driver_data;  in usb_serial_generic_msr_changed()  local
506 	 * Use tty-port initialised flag to detect all hangups including the  in usb_serial_generic_msr_changed()
509 	if (!tty_port_initialized(&port->port))  in usb_serial_generic_msr_changed()
512 	spin_lock_irqsave(&port->lock, flags);  in usb_serial_generic_msr_changed()
513 	cnow = port->icount;				/* atomic copy*/  in usb_serial_generic_msr_changed()
514 	spin_unlock_irqrestore(&port->lock, flags);  in usb_serial_generic_msr_changed()
528 	struct usb_serial_port *port = tty->driver_data;  in usb_serial_generic_tiocmiwait()  local
533 	spin_lock_irqsave(&port->lock, flags);  in usb_serial_generic_tiocmiwait()
534 	cnow = port->icount;				/* atomic copy */  in usb_serial_generic_tiocmiwait()
535 	spin_unlock_irqrestore(&port->lock, flags);  in usb_serial_generic_tiocmiwait()
537 	ret = wait_event_interruptible(port->port.delta_msr_wait,  in usb_serial_generic_tiocmiwait()
539 	if (!ret && !tty_port_initialized(&port->port))  in usb_serial_generic_tiocmiwait()
549 	struct usb_serial_port *port = tty->driver_data;  in usb_serial_generic_get_icount()  local
553 	spin_lock_irqsave(&port->lock, flags);  in usb_serial_generic_get_icount()
554 	cnow = port->icount;				/* atomic copy */  in usb_serial_generic_get_icount()
555 	spin_unlock_irqrestore(&port->lock, flags);  in usb_serial_generic_get_icount()
574 int usb_serial_handle_sysrq_char(struct usb_serial_port *port, unsigned int ch)  in usb_serial_handle_sysrq_char()  argument
576 	if (port->sysrq) {  in usb_serial_handle_sysrq_char()
577 		if (ch && time_before(jiffies, port->sysrq)) {  in usb_serial_handle_sysrq_char()
579 			port->sysrq = 0;  in usb_serial_handle_sysrq_char()
582 		port->sysrq = 0;  in usb_serial_handle_sysrq_char()
588 int usb_serial_handle_break(struct usb_serial_port *port)  in usb_serial_handle_break()  argument
590 	if (!port->port.console)  in usb_serial_handle_break()
593 	if (!port->sysrq) {  in usb_serial_handle_break()
594 		port->sysrq = jiffies + HZ*5;  in usb_serial_handle_break()
597 	port->sysrq = 0;  in usb_serial_handle_break()
605  * @port: usb-serial port
606  * @tty: tty for the port
609 void usb_serial_handle_dcd_change(struct usb_serial_port *port,  in usb_serial_handle_dcd_change()  argument
612 	dev_dbg(&port->dev, "%s - status %d\n", __func__, status);  in usb_serial_handle_dcd_change()
625 		wake_up_interruptible(&port->port.open_wait);  in usb_serial_handle_dcd_change()
633 	struct usb_serial_port *port;  in usb_serial_generic_resume()  local
637 		port = serial->port[i];  in usb_serial_generic_resume()
638 		if (!tty_port_initialized(&port->port))  in usb_serial_generic_resume()
641 		if (port->bulk_in_size) {  in usb_serial_generic_resume()
642 			r = usb_serial_generic_submit_read_urbs(port,  in usb_serial_generic_resume()
648 		if (port->bulk_out_size) {  in usb_serial_generic_resume()
649 			r = usb_serial_generic_write_start(port, GFP_NOIO);  in usb_serial_generic_resume()