root/include/linux/serial_8250.h

INCLUDED FROM

/*
 *  linux/include/linux/serial_8250.h
 *
 *  Copyright (C) 2004 Russell King
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 */
#ifndef _LINUX_SERIAL_8250_H
#define _LINUX_SERIAL_8250_H

#include <linux/serial_core.h>
#include <linux/platform_device.h>

/*
 * This is the platform device platform_data structure
 */
struct plat_serial8250_port {
        unsigned long   iobase;         /* io base address */
        void __iomem    *membase;       /* ioremap cookie or NULL */
        resource_size_t mapbase;        /* resource base */
        unsigned int    irq;            /* interrupt number */
        unsigned int    uartclk;        /* UART clock rate */
        void            *private_data;
        unsigned char   regshift;       /* register shift */
        unsigned char   iotype;         /* UPIO_* */
        unsigned char   hub6;
        upf_t           flags;          /* UPF_* flags */
};

/*
 * Allocate 8250 platform device IDs.  Nothing is implied by
 * the numbering here, except for the legacy entry being -1.
 */
enum {
        PLAT8250_DEV_LEGACY = -1,
        PLAT8250_DEV_PLATFORM,
        PLAT8250_DEV_PLATFORM1,
        PLAT8250_DEV_PLATFORM2,
        PLAT8250_DEV_FOURPORT,
        PLAT8250_DEV_ACCENT,
        PLAT8250_DEV_BOCA,
        PLAT8250_DEV_EXAR_ST16C554,
        PLAT8250_DEV_HUB6,
        PLAT8250_DEV_MCA,
        PLAT8250_DEV_AU1X00,
        PLAT8250_DEV_SM501,
};

/*
 * This should be used by drivers which want to register
 * their own 8250 ports without registering their own
 * platform device.  Using these will make your driver
 * dependent on the 8250 driver.
 */
struct uart_port;

int serial8250_register_port(struct uart_port *);
void serial8250_unregister_port(int line);
void serial8250_suspend_port(int line);
void serial8250_resume_port(int line);

extern int early_serial_setup(struct uart_port *port);

extern int serial8250_find_port(struct uart_port *p);
extern int serial8250_find_port_for_earlycon(void);
extern int setup_early_serial8250_console(char *cmdline);

#endif