usb/serial/ti_usb_3410_5052.c

329 static void ti_send(struct ti_port *tport);
330 static int ti_set_mcr(struct ti_port *tport, unsigned int mcr);
331 static int ti_get_lsr(struct ti_port *tport, u8 *lsr);
333 static void ti_handle_new_msr(struct ti_port *tport, u8 msr);
335 static void ti_stop_read(struct ti_port *tport, struct tty_struct *tty);
336 static int ti_restart_read(struct ti_port *tport, struct tty_struct *tty);
601 	struct ti_port *tport;
603 	tport = kzalloc(sizeof(*tport), GFP_KERNEL);
604 	if (!tport)
607 	spin_lock_init(&tport->tp_lock);
609 		tport->tp_uart_base_addr = TI_UART1_BASE_ADDR;
611 		tport->tp_uart_base_addr = TI_UART2_BASE_ADDR;
612 	tport->tp_port = port;
613 	tport->tp_tdev = usb_get_serial_data(port->serial);
615 	if (tport->tp_tdev->td_rs485_only)
616 		tport->tp_uart_mode = TI_UART_485_RECEIVER_DISABLED;
618 		tport->tp_uart_mode = TI_UART_232;
620 	usb_set_serial_port_data(port, tport);
626 	if (!tport->tp_tdev->td_is_3410)
634 	struct ti_port *tport;
636 	tport = usb_get_serial_port_data(port);
637 	kfree(tport);
642 	struct ti_port *tport = usb_get_serial_port_data(port);
654 	tdev = tport->tp_tdev;
660 	tport->tp_msr = 0;
661 	tport->tp_shadow_mcr |= (TI_MCR_RTS | TI_MCR_DTR);
739 	tport->tp_read_urb_state = TI_READ_URB_RUNNING;
740 	urb->context = tport;
748 	tport->tp_is_open = 1;
765 	struct ti_port *tport;
770 	tport = usb_get_serial_port_data(port);
772 	tport->tp_is_open = 0;
776 	tport->tp_write_urb_in_use = 0;
777 	spin_lock_irqsave(&tport->tp_lock, flags);
779 	spin_unlock_irqrestore(&tport->tp_lock, flags);
800 	struct ti_port *tport = usb_get_serial_port_data(port);
806 	if (!tport->tp_is_open)
810 							&tport->tp_lock);
811 	ti_send(tport);
820 	struct ti_port *tport = usb_get_serial_port_data(port);
824 	spin_lock_irqsave(&tport->tp_lock, flags);
826 	spin_unlock_irqrestore(&tport->tp_lock, flags);
836 	struct ti_port *tport = usb_get_serial_port_data(port);
840 	spin_lock_irqsave(&tport->tp_lock, flags);
842 	spin_unlock_irqrestore(&tport->tp_lock, flags);
850 	struct ti_port *tport = usb_get_serial_port_data(port);
858 	if (tport->tp_tdev->td_is_3410)
863 	ret = ti_get_lsr(tport, &lsr);
873 	struct ti_port *tport = usb_get_serial_port_data(port);
876 		ti_stop_read(tport, tty);
884 	struct ti_port *tport = usb_get_serial_port_data(port);
888 		status = ti_restart_read(tport, tty);
899 	struct ti_port *tport = usb_get_serial_port_data(port);
914 	config->bUartMode = tport->tp_uart_mode;
959 		ti_restart_read(tport, tty);
969 			ti_restart_read(tport, tty);
978 	if (tport->tp_tdev->td_is_3410)
1003 	mcr = tport->tp_shadow_mcr;
1007 	status = ti_set_mcr(tport, mcr);
1019 	struct ti_port *tport = usb_get_serial_port_data(port);
1025 	spin_lock_irqsave(&tport->tp_lock, flags);
1026 	msr = tport->tp_msr;
1027 	mcr = tport->tp_shadow_mcr;
1028 	spin_unlock_irqrestore(&tport->tp_lock, flags);
1048 	struct ti_port *tport = usb_get_serial_port_data(port);
1052 	spin_lock_irqsave(&tport->tp_lock, flags);
1053 	mcr = tport->tp_shadow_mcr;
1068 	spin_unlock_irqrestore(&tport->tp_lock, flags);
1070 	return ti_set_mcr(tport, mcr);
1077 	struct ti_port *tport = usb_get_serial_port_data(port);
1082 	status = ti_write_byte(port, tport->tp_tdev,
1083 		tport->tp_uart_base_addr + TI_UART_OFFSET_LCR,
1109 	struct ti_port *tport;
1156 	tport = usb_get_serial_port_data(port);
1157 	if (!tport)
1169 		ti_handle_new_msr(tport, msr);
1188 	struct ti_port *tport = urb->context;
1189 	struct usb_serial_port *port = tport->tp_port;
1220 		if (!tport->tp_is_open)
1225 		spin_lock_irqsave(&tport->tp_lock, flags);
1227 		spin_unlock_irqrestore(&tport->tp_lock, flags);
1232 	spin_lock_irqsave(&tport->tp_lock, flags);
1233 	if (tport->tp_read_urb_state == TI_READ_URB_RUNNING)
1235 	else if (tport->tp_read_urb_state == TI_READ_URB_STOPPING)
1236 		tport->tp_read_urb_state = TI_READ_URB_STOPPED;
1238 	spin_unlock_irqrestore(&tport->tp_lock, flags);
1247 	struct ti_port *tport = urb->context;
1248 	struct usb_serial_port *port = tport->tp_port;
1251 	tport->tp_write_urb_in_use = 0;
1267 	ti_send(tport);
1291 static void ti_send(struct ti_port *tport)
1294 	struct usb_serial_port *port = tport->tp_port;
1297 	spin_lock_irqsave(&tport->tp_lock, flags);
1299 	if (tport->tp_write_urb_in_use)
1309 	tport->tp_write_urb_in_use = 1;
1311 	spin_unlock_irqrestore(&tport->tp_lock, flags);
1320 			   ti_bulk_out_callback, tport);
1326 		tport->tp_write_urb_in_use = 0;
1329 		spin_lock_irqsave(&tport->tp_lock, flags);
1331 		spin_unlock_irqrestore(&tport->tp_lock, flags);
1339 	spin_unlock_irqrestore(&tport->tp_lock, flags);
1344 static int ti_set_mcr(struct ti_port *tport, unsigned int mcr)
1349 	status = ti_write_byte(tport->tp_port, tport->tp_tdev,
1350 		tport->tp_uart_base_addr + TI_UART_OFFSET_MCR,
1353 	spin_lock_irqsave(&tport->tp_lock, flags);
1355 		tport->tp_shadow_mcr = mcr;
1356 	spin_unlock_irqrestore(&tport->tp_lock, flags);
1362 static int ti_get_lsr(struct ti_port *tport, u8 *lsr)
1365 	struct usb_serial_port *port = tport->tp_port;
1394 	struct ti_port *tport = usb_get_serial_port_data(port);
1396 	ss->baud_base = tport->tp_tdev->td_is_3410 ? 921600 : 460800;
1400 static void ti_handle_new_msr(struct ti_port *tport, u8 msr)
1406 	dev_dbg(&tport->tp_port->dev, "%s - msr 0x%02X\n", __func__, msr);
1409 		spin_lock_irqsave(&tport->tp_lock, flags);
1410 		icount = &tport->tp_port->icount;
1419 		wake_up_interruptible(&tport->tp_port->port.delta_msr_wait);
1420 		spin_unlock_irqrestore(&tport->tp_lock, flags);
1423 	tport->tp_msr = msr & TI_MSR_MASK;
1426 	tty = tty_port_tty_get(&tport->tp_port->port);
1435 static void ti_stop_read(struct ti_port *tport, struct tty_struct *tty)
1439 	spin_lock_irqsave(&tport->tp_lock, flags);
1441 	if (tport->tp_read_urb_state == TI_READ_URB_RUNNING)
1442 		tport->tp_read_urb_state = TI_READ_URB_STOPPING;
1444 	spin_unlock_irqrestore(&tport->tp_lock, flags);
1448 static int ti_restart_read(struct ti_port *tport, struct tty_struct *tty)
1454 	spin_lock_irqsave(&tport->tp_lock, flags);
1456 	if (tport->tp_read_urb_state == TI_READ_URB_STOPPED) {
1457 		tport->tp_read_urb_state = TI_READ_URB_RUNNING;
1458 		urb = tport->tp_port->read_urb;
1459 		spin_unlock_irqrestore(&tport->tp_lock, flags);
1460 		urb->context = tport;
1463 		tport->tp_read_urb_state = TI_READ_URB_RUNNING;
1464 		spin_unlock_irqrestore(&tport->tp_lock, flags);