drivers/tty/serial/serial_base.h

   1 /* SPDX-License-Identifier: GPL-2.0+ */
   2 /*
   3  * Serial core related functions, serial port device drivers do not need this.
   4  *
   5  * Copyright (C) 2023 Texas Instruments Incorporated - https://www.ti.com/
   6  * Author: Tony Lindgren <tony@atomide.com>
   7  */
   8
   9 #define to_serial_base_ctrl_device(d) container_of((d), struct serial_ctrl_device, dev)
  10 #define to_serial_base_port_device(d) container_of((d), struct serial_port_device, dev)
  11
  12 struct uart_driver;
  13 struct uart_port;
  14 struct device_driver;
  15 struct device;
  16
  17 struct serial_ctrl_device {
  18         struct device dev;
  19         struct ida port_ida;
  20 };
  21
  22 struct serial_port_device {
  23         struct device dev;
  24         struct uart_port *port;
  25         unsigned int tx_enabled:1;
  26 };
  27
  28 int serial_base_ctrl_init(void);
  29 void serial_base_ctrl_exit(void);
  30
  31 int serial_base_port_init(void);
  32 void serial_base_port_exit(void);
  33
  34 void serial_base_port_startup(struct uart_port *port);
  35 void serial_base_port_shutdown(struct uart_port *port);
  36
  37 int serial_base_driver_register(struct device_driver *driver);
  38 void serial_base_driver_unregister(struct device_driver *driver);
  39
  40 struct serial_ctrl_device *serial_base_ctrl_add(struct uart_port *port,
  41                                                 struct device *parent);
  42 struct serial_port_device *serial_base_port_add(struct uart_port *port,
  43                                                 struct serial_ctrl_device *parent);
  44 void serial_base_ctrl_device_remove(struct serial_ctrl_device *ctrl_dev);
  45 void serial_base_port_device_remove(struct serial_port_device *port_dev);
  46
  47 int serial_ctrl_register_port(struct uart_driver *drv, struct uart_port *port);
  48 void serial_ctrl_unregister_port(struct uart_driver *drv, struct uart_port *port);
  49
  50 int serial_core_register_port(struct uart_driver *drv, struct uart_port *port);
  51 void serial_core_unregister_port(struct uart_driver *drv, struct uart_port *port);
  52
  53 #ifdef CONFIG_SERIAL_CORE_CONSOLE
  54
  55 int serial_base_match_and_update_preferred_console(struct uart_driver *drv,
  56                                                    struct uart_port *port);
  57
  58 #else
  59
  60 static inline
  61 int serial_base_match_and_update_preferred_console(struct uart_driver *drv,
  62                                                    struct uart_port *port)
  63 {
  64         return 0;
  65 }
  66
  67 #endif