196 static int mxuport_prepare_write_buffer(struct usb_serial_port *port,  in mxuport_prepare_write_buffer()  argument
202 	count = kfifo_out_locked(&port->write_fifo, buf + HEADER_SIZE,  in mxuport_prepare_write_buffer()
204 				 &port->lock);  in mxuport_prepare_write_buffer()
206 	put_unaligned_be16(port->port_number, buf);  in mxuport_prepare_write_buffer()
209 	dev_dbg(&port->dev, "%s - size %zd count %d\n", __func__,  in mxuport_prepare_write_buffer()
297 	struct usb_serial_port *port = tty->driver_data;  in mxuport_throttle()  local
298 	struct usb_serial *serial = port->serial;  in mxuport_throttle()
300 	dev_dbg(&port->dev, "%s\n", __func__);  in mxuport_throttle()
303 			      0, port->port_number);  in mxuport_throttle()
316 	struct usb_serial_port *port = tty->driver_data;  in mxuport_unthrottle()  local
317 	struct usb_serial *serial = port->serial;  in mxuport_unthrottle()
319 	dev_dbg(&port->dev, "%s\n", __func__);  in mxuport_unthrottle()
322 			      1, port->port_number);  in mxuport_unthrottle()
329 static void mxuport_process_read_urb_data(struct usb_serial_port *port,  in mxuport_process_read_urb_data()  argument
334 	if (!port->port.console || !port->sysrq) {  in mxuport_process_read_urb_data()
335 		tty_insert_flip_string(&port->port, data, size);  in mxuport_process_read_urb_data()
338 			if (!usb_serial_handle_sysrq_char(port, *data))  in mxuport_process_read_urb_data()
339 				tty_insert_flip_char(&port->port, *data,  in mxuport_process_read_urb_data()
343 	tty_flip_buffer_push(&port->port);  in mxuport_process_read_urb_data()
346 static void mxuport_msr_event(struct usb_serial_port *port, u8 buf[4])  in mxuport_msr_event()  argument
348 	struct mxuport_port *mxport = usb_get_serial_port_data(port);  in mxuport_msr_event()
359 	dev_dbg(&port->dev, "%s - current MSR status = 0x%x\n",  in mxuport_msr_event()
364 		dev_dbg(&port->dev, "%s - CTS high\n", __func__);  in mxuport_msr_event()
367 		dev_dbg(&port->dev, "%s - CTS low\n", __func__);  in mxuport_msr_event()
372 		dev_dbg(&port->dev, "%s - DSR high\n", __func__);  in mxuport_msr_event()
375 		dev_dbg(&port->dev, "%s - DSR low\n", __func__);  in mxuport_msr_event()
380 		dev_dbg(&port->dev, "%s - DCD high\n", __func__);  in mxuport_msr_event()
383 		dev_dbg(&port->dev, "%s - DCD low\n", __func__);  in mxuport_msr_event()
391 			port->icount.cts++;  in mxuport_msr_event()
392 			dev_dbg(&port->dev, "%s - CTS change\n", __func__);  in mxuport_msr_event()
396 			port->icount.dsr++;  in mxuport_msr_event()
397 			dev_dbg(&port->dev, "%s - DSR change\n", __func__);  in mxuport_msr_event()
401 			port->icount.dcd++;  in mxuport_msr_event()
402 			dev_dbg(&port->dev, "%s - DCD change\n", __func__);  in mxuport_msr_event()
404 		wake_up_interruptible(&port->port.delta_msr_wait);  in mxuport_msr_event()
408 static void mxuport_lsr_event(struct usb_serial_port *port, u8 buf[4])  in mxuport_lsr_event()  argument
413 		port->icount.brk++;  in mxuport_lsr_event()
414 		dev_dbg(&port->dev, "%s - break error\n", __func__);  in mxuport_lsr_event()
418 		port->icount.frame++;  in mxuport_lsr_event()
419 		dev_dbg(&port->dev, "%s - frame error\n", __func__);  in mxuport_lsr_event()
423 		port->icount.parity++;  in mxuport_lsr_event()
424 		dev_dbg(&port->dev, "%s - parity error\n", __func__);  in mxuport_lsr_event()
428 		port->icount.overrun++;  in mxuport_lsr_event()
429 		dev_dbg(&port->dev, "%s - overrun error\n", __func__);  in mxuport_lsr_event()
437 static void mxuport_process_read_urb_event(struct usb_serial_port *port,  in mxuport_process_read_urb_event()  argument
440 	dev_dbg(&port->dev, "%s - receive event : %04x\n", __func__, event);  in mxuport_process_read_urb_event()
450 		mxuport_msr_event(port, buf);  in mxuport_process_read_urb_event()
453 		mxuport_lsr_event(port, buf);  in mxuport_process_read_urb_event()
465 		dev_dbg(&port->dev, "Unexpected event\n");  in mxuport_process_read_urb_event()
476 	struct usb_serial_port *port = urb->context;  in mxuport_process_read_urb_demux_data()  local
477 	struct usb_serial *serial = port->serial;  in mxuport_process_read_urb_demux_data()
487 			dev_warn(&port->dev, "%s - message with short header\n",  in mxuport_process_read_urb_demux_data()
494 			dev_warn(&port->dev, "%s - message for invalid port\n",  in mxuport_process_read_urb_demux_data()
499 		demux_port = serial->port[rcv_port];  in mxuport_process_read_urb_demux_data()
502 			dev_warn(&port->dev, "%s - short data\n", __func__);  in mxuport_process_read_urb_demux_data()
506 		if (test_bit(ASYNCB_INITIALIZED, &demux_port->port.flags)) {  in mxuport_process_read_urb_demux_data()
523 	struct usb_serial_port *port = urb->context;  in mxuport_process_read_urb_demux_event()  local
524 	struct usb_serial *serial = port->serial;  in mxuport_process_read_urb_demux_event()
534 			dev_warn(&port->dev, "%s - message with short event\n",  in mxuport_process_read_urb_demux_event()
541 			dev_warn(&port->dev, "%s - message for invalid port\n",  in mxuport_process_read_urb_demux_event()
546 		demux_port = serial->port[rcv_port];  in mxuport_process_read_urb_demux_event()
547 		if (test_bit(ASYNCB_INITIALIZED, &demux_port->port.flags)) {  in mxuport_process_read_urb_demux_event()
567 	struct usb_serial_port *port = urb->context;  in mxuport_process_read_urb()  local
568 	struct usb_serial *serial = port->serial;  in mxuport_process_read_urb()
570 	if (port == serial->port[0])  in mxuport_process_read_urb()
573 	if (port == serial->port[1])  in mxuport_process_read_urb()
581 static bool mxuport_tx_empty(struct usb_serial_port *port)  in mxuport_tx_empty()  argument
583 	struct usb_serial *serial = port->serial;  in mxuport_tx_empty()
594 				    port->port_number, len_buf, 4);  in mxuport_tx_empty()
599 	dev_dbg(&port->dev, "%s - tx len = %u\n", __func__, txlen);  in mxuport_tx_empty()
609 static int mxuport_set_mcr(struct usb_serial_port *port, u8 mcr_state)  in mxuport_set_mcr()  argument
611 	struct usb_serial *serial = port->serial;  in mxuport_set_mcr()
614 	dev_dbg(&port->dev, "%s - %02x\n", __func__, mcr_state);  in mxuport_set_mcr()
617 				    mcr_state, port->port_number);  in mxuport_set_mcr()
619 		dev_err(&port->dev, "%s - failed to change MCR\n", __func__);  in mxuport_set_mcr()
624 static int mxuport_set_dtr(struct usb_serial_port *port, int on)  in mxuport_set_dtr()  argument
626 	struct mxuport_port *mxport = usb_get_serial_port_data(port);  in mxuport_set_dtr()
627 	struct usb_serial *serial = port->serial;  in mxuport_set_dtr()
633 				    !!on, port->port_number);  in mxuport_set_dtr()
646 static int mxuport_set_rts(struct usb_serial_port *port, u8 state)  in mxuport_set_rts()  argument
648 	struct mxuport_port *mxport = usb_get_serial_port_data(port);  in mxuport_set_rts()
649 	struct usb_serial *serial = port->serial;  in mxuport_set_rts()
678 				    state, port->port_number);  in mxuport_set_rts()
688 static void mxuport_dtr_rts(struct usb_serial_port *port, int on)  in mxuport_dtr_rts()  argument
690 	struct mxuport_port *mxport = usb_get_serial_port_data(port);  in mxuport_dtr_rts()
702 	err = mxuport_set_mcr(port, mcr_state);  in mxuport_dtr_rts()
712 	struct usb_serial_port *port = tty->driver_data;  in mxuport_tiocmset()  local
713 	struct mxuport_port *mxport = usb_get_serial_port_data(port);  in mxuport_tiocmset()
732 	err = mxuport_set_mcr(port, mcr_state);  in mxuport_tiocmset()
744 	struct usb_serial_port *port = tty->driver_data;  in mxuport_tiocmget()  local
750 	mxport = usb_get_serial_port_data(port);  in mxuport_tiocmget()
768 	dev_dbg(&port->dev, "%s - 0x%04x\n", __func__, result);  in mxuport_tiocmget()
775 				    struct usb_serial_port *port,  in mxuport_set_termios_flow()  argument
796 						 0, port->port_number,  in mxuport_set_termios_flow()
801 		dev_dbg(&port->dev, "%s - XON = 0x%02x, XOFF = 0x%02x\n",  in mxuport_set_termios_flow()
808 				    enable, port->port_number);  in mxuport_set_termios_flow()
830 			mxuport_set_dtr(port, 1);  in mxuport_set_termios_flow()
835 		mxuport_set_dtr(port, 0);  in mxuport_set_termios_flow()
839 		err = mxuport_set_rts(port, rts);  in mxuport_set_termios_flow()
847 				struct usb_serial_port *port,  in mxuport_set_termios()  argument
850 	struct usb_serial *serial = port->serial;  in mxuport_set_termios()
861 		dev_dbg(&port->dev, "%s - nothing to change\n", __func__);  in mxuport_set_termios()
915 					 0, port->port_number, buf, 4);  in mxuport_set_termios()
919 	err = mxuport_set_termios_flow(tty, old_termios, port, serial);  in mxuport_set_termios()
931 					 0, port->port_number,  in mxuport_set_termios()
936 	dev_dbg(&port->dev, "baud_rate	: %d\n", baud);  in mxuport_set_termios()
937 	dev_dbg(&port->dev, "data_bits	: %d\n", data_bits);  in mxuport_set_termios()
938 	dev_dbg(&port->dev, "parity	: %d\n", parity);  in mxuport_set_termios()
939 	dev_dbg(&port->dev, "stop_bits	: %d\n", stop_bits);  in mxuport_set_termios()
1110 static int mxuport_port_probe(struct usb_serial_port *port)  in mxuport_port_probe()  argument
1112 	struct usb_serial *serial = port->serial;  in mxuport_port_probe()
1116 	mxport = devm_kzalloc(&port->dev, sizeof(struct mxuport_port),  in mxuport_port_probe()
1125 	usb_set_serial_port_data(port, mxport);  in mxuport_port_probe()
1129 				    0, port->port_number);  in mxuport_port_probe()
1135 				    0, port->port_number);  in mxuport_port_probe()
1142 				    port->port_number);  in mxuport_port_probe()
1150 				   struct usb_serial_port *port,  in mxuport_alloc_write_urb()  argument
1156 	set_bit(j, &port->write_urbs_free);  in mxuport_alloc_write_urb()
1157 	port->write_urbs[j] = usb_alloc_urb(0, GFP_KERNEL);  in mxuport_alloc_write_urb()
1158 	if (!port->write_urbs[j])  in mxuport_alloc_write_urb()
1161 	port->bulk_out_buffers[j] = kmalloc(port0->bulk_out_size, GFP_KERNEL);  in mxuport_alloc_write_urb()
1162 	if (!port->bulk_out_buffers[j])  in mxuport_alloc_write_urb()
1165 	usb_fill_bulk_urb(port->write_urbs[j], dev,  in mxuport_alloc_write_urb()
1166 			  usb_sndbulkpipe(dev, port->bulk_out_endpointAddress),  in mxuport_alloc_write_urb()
1167 			  port->bulk_out_buffers[j],  in mxuport_alloc_write_urb()
1168 			  port->bulk_out_size,  in mxuport_alloc_write_urb()
1170 			  port);  in mxuport_alloc_write_urb()
1176 				    struct usb_serial_port *port,  in mxuport_alloc_write_urbs()  argument
1182 	for (j = 0; j < ARRAY_SIZE(port->write_urbs); ++j) {  in mxuport_alloc_write_urbs()
1183 		ret = mxuport_alloc_write_urb(serial, port, port0, j);  in mxuport_alloc_write_urbs()
1193 	struct usb_serial_port *port0 = serial->port[0];  in mxuport_attach()
1194 	struct usb_serial_port *port1 = serial->port[1];  in mxuport_attach()
1195 	struct usb_serial_port *port;  in mxuport_attach()  local
1205 		port = serial->port[i];  in mxuport_attach()
1206 		for (j = 0; j < ARRAY_SIZE(port->write_urbs); ++j) {  in mxuport_attach()
1207 			usb_free_urb(port->write_urbs[j]);  in mxuport_attach()
1208 			kfree(port->bulk_out_buffers[j]);  in mxuport_attach()
1209 			port->write_urbs[j] = NULL;  in mxuport_attach()
1210 			port->bulk_out_buffers[j] = NULL;  in mxuport_attach()
1212 		port->write_urbs_free = 0;  in mxuport_attach()
1221 		port = serial->port[i];  in mxuport_attach()
1222 		port->bulk_out_size = port0->bulk_out_size;  in mxuport_attach()
1223 		port->bulk_out_endpointAddress =  in mxuport_attach()
1226 		err = mxuport_alloc_write_urbs(serial, port, port0);  in mxuport_attach()
1230 		port->write_urb = port->write_urbs[0];  in mxuport_attach()
1231 		port->bulk_out_buffer = port->bulk_out_buffers[0];  in mxuport_attach()
1238 		if (!kfifo_initialized(&port->write_fifo)) {  in mxuport_attach()
1239 			err = kfifo_alloc(&port->write_fifo, PAGE_SIZE,  in mxuport_attach()
1268 	struct usb_serial_port *port0 = serial->port[0];  in mxuport_release()
1269 	struct usb_serial_port *port1 = serial->port[1];  in mxuport_release()
1275 static int mxuport_open(struct tty_struct *tty, struct usb_serial_port *port)  in mxuport_open()  argument
1277 	struct mxuport_port *mxport = usb_get_serial_port_data(port);  in mxuport_open()
1278 	struct usb_serial *serial = port->serial;  in mxuport_open()
1283 				    1, port->port_number);  in mxuport_open()
1288 				    1, port->port_number);  in mxuport_open()
1291 				      0, port->port_number);  in mxuport_open()
1297 		mxuport_set_termios(tty, port, NULL);  in mxuport_open()
1308 static void mxuport_close(struct usb_serial_port *port)  in mxuport_close()  argument
1310 	struct usb_serial *serial = port->serial;  in mxuport_close()
1313 			      port->port_number);  in mxuport_close()
1316 			      port->port_number);  in mxuport_close()
1322 	struct usb_serial_port *port = tty->driver_data;  in mxuport_break_ctl()  local
1323 	struct usb_serial *serial = port->serial;  in mxuport_break_ctl()
1328 		dev_dbg(&port->dev, "%s - sending break\n", __func__);  in mxuport_break_ctl()
1331 		dev_dbg(&port->dev, "%s - clearing break\n", __func__);  in mxuport_break_ctl()
1335 			      enable, port->port_number);  in mxuport_break_ctl()
1340 	struct usb_serial_port *port;  in mxuport_resume()  local
1346 		port = serial->port[i];  in mxuport_resume()
1348 		r = usb_serial_generic_submit_read_urbs(port, GFP_NOIO);  in mxuport_resume()
1354 		port = serial->port[i];  in mxuport_resume()
1355 		if (!test_bit(ASYNCB_INITIALIZED, &port->port.flags))  in mxuport_resume()
1358 		r = usb_serial_generic_write_start(port, GFP_NOIO);  in mxuport_resume()