LXR linux/include/linux/serial

   1/*
   2 *  linux/include/linux/serial_8250.h
   3 *
   4 *  Copyright (C) 2004 Russell King
   5 *
   6 * This program is free software; you can redistribute it and/or modify
   7 * it under the terms of the GNU General Public License as published by
   8 * the Free Software Foundation; either version 2 of the License, or
   9 * (at your option) any later version.
  10 */
  11#ifndef _LINUX_SERIAL_8250_H
  12#define _LINUX_SERIAL_8250_H
  13
  14#include <linux/serial_core.h>
  15#include <linux/platform_device.h>
  16
  17/*
  18 * This is the platform device platform_data structure
  19 */
  20struct plat_serial8250_port {
  21        unsigned long   iobase;         /* io base address */
  22        void __iomem    *membase;       /* ioremap cookie or NULL */
  23        resource_size_t mapbase;        /* resource base */
  24        unsigned int    irq;            /* interrupt number */
  25        unsigned int    uartclk;        /* UART clock rate */
  26        void            *private_data;
  27        unsigned char   regshift;       /* register shift */
  28        unsigned char   iotype;         /* UPIO_* */
  29        unsigned char   hub6;
  30        upf_t           flags;          /* UPF_* flags */
  31        unsigned int    type;           /* If UPF_FIXED_TYPE */
  32        unsigned int    (*serial_in)(struct uart_port *, int);
  33        void            (*serial_out)(struct uart_port *, int, int);
  34};
  35
  36/*
  37 * Allocate 8250 platform device IDs.  Nothing is implied by
  38 * the numbering here, except for the legacy entry being -1.
  39 */
  40enum {
  41        PLAT8250_DEV_LEGACY = -1,
  42        PLAT8250_DEV_PLATFORM,
  43        PLAT8250_DEV_PLATFORM1,
  44        PLAT8250_DEV_PLATFORM2,
  45        PLAT8250_DEV_FOURPORT,
  46        PLAT8250_DEV_ACCENT,
  47        PLAT8250_DEV_BOCA,
  48        PLAT8250_DEV_EXAR_ST16C554,
  49        PLAT8250_DEV_HUB6,
  50        PLAT8250_DEV_MCA,
  51        PLAT8250_DEV_AU1X00,
  52        PLAT8250_DEV_SM501,
  53};
  54
  55/*
  56 * This should be used by drivers which want to register
  57 * their own 8250 ports without registering their own
  58 * platform device.  Using these will make your driver
  59 * dependent on the 8250 driver.
  60 */
  61struct uart_port;
  62
  63int serial8250_register_port(struct uart_port *);
  64void serial8250_unregister_port(int line);
  65void serial8250_suspend_port(int line);
  66void serial8250_resume_port(int line);
  67
  68extern int early_serial_setup(struct uart_port *port);
  69
  70extern int serial8250_find_port(struct uart_port *p);
  71extern int serial8250_find_port_for_earlycon(void);
  72extern int setup_early_serial8250_console(char *cmdline);
  73
  74#endif
  75