linux/include/linux/serial_8250.h
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   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 long   irqflags;       /* request_irq flags */
  26        unsigned int    uartclk;        /* UART clock rate */
  27        void            *private_data;
  28        unsigned char   regshift;       /* register shift */
  29        unsigned char   iotype;         /* UPIO_* */
  30        unsigned char   hub6;
  31        upf_t           flags;          /* UPF_* flags */
  32        unsigned int    type;           /* If UPF_FIXED_TYPE */
  33        unsigned int    (*serial_in)(struct uart_port *, int);
  34        void            (*serial_out)(struct uart_port *, int, int);
  35        void            (*set_termios)(struct uart_port *,
  36                                       struct ktermios *new,
  37                                       struct ktermios *old);
  38        int             (*handle_irq)(struct uart_port *);
  39        void            (*pm)(struct uart_port *, unsigned int state,
  40                              unsigned old);
  41        void            (*handle_break)(struct uart_port *);
  42};
  43
  44/*
  45 * Allocate 8250 platform device IDs.  Nothing is implied by
  46 * the numbering here, except for the legacy entry being -1.
  47 */
  48enum {
  49        PLAT8250_DEV_LEGACY = -1,
  50        PLAT8250_DEV_PLATFORM,
  51        PLAT8250_DEV_PLATFORM1,
  52        PLAT8250_DEV_PLATFORM2,
  53        PLAT8250_DEV_FOURPORT,
  54        PLAT8250_DEV_ACCENT,
  55        PLAT8250_DEV_BOCA,
  56        PLAT8250_DEV_EXAR_ST16C554,
  57        PLAT8250_DEV_HUB6,
  58        PLAT8250_DEV_AU1X00,
  59        PLAT8250_DEV_SM501,
  60};
  61
  62/*
  63 * This should be used by drivers which want to register
  64 * their own 8250 ports without registering their own
  65 * platform device.  Using these will make your driver
  66 * dependent on the 8250 driver.
  67 */
  68struct uart_port;
  69struct uart_8250_port;
  70
  71int serial8250_register_8250_port(struct uart_8250_port *);
  72int serial8250_register_port(struct uart_port *);
  73void serial8250_unregister_port(int line);
  74void serial8250_suspend_port(int line);
  75void serial8250_resume_port(int line);
  76
  77extern int early_serial_setup(struct uart_port *port);
  78
  79extern int serial8250_find_port(struct uart_port *p);
  80extern int serial8250_find_port_for_earlycon(void);
  81extern int setup_early_serial8250_console(char *cmdline);
  82extern void serial8250_do_set_termios(struct uart_port *port,
  83                struct ktermios *termios, struct ktermios *old);
  84extern void serial8250_do_pm(struct uart_port *port, unsigned int state,
  85                             unsigned int oldstate);
  86extern int fsl8250_handle_irq(struct uart_port *port);
  87int serial8250_handle_irq(struct uart_port *port, unsigned int iir);
  88unsigned char serial8250_rx_chars(struct uart_8250_port *up, unsigned char lsr);
  89void serial8250_tx_chars(struct uart_8250_port *up);
  90unsigned int serial8250_modem_status(struct uart_8250_port *up);
  91
  92extern void serial8250_set_isa_configurator(void (*v)
  93                                        (int port, struct uart_port *up,
  94                                                unsigned short *capabilities));
  95
  96#endif
  97
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