include/linux/serial_8250.h

   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  */
  20 struct 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 };
  42
  43 /*
  44  * Allocate 8250 platform device IDs.  Nothing is implied by
  45  * the numbering here, except for the legacy entry being -1.
  46  */
  47 enum {
  48         PLAT8250_DEV_LEGACY = -1,
  49         PLAT8250_DEV_PLATFORM,
  50         PLAT8250_DEV_PLATFORM1,
  51         PLAT8250_DEV_PLATFORM2,
  52         PLAT8250_DEV_FOURPORT,
  53         PLAT8250_DEV_ACCENT,
  54         PLAT8250_DEV_BOCA,
  55         PLAT8250_DEV_EXAR_ST16C554,
  56         PLAT8250_DEV_HUB6,
  57         PLAT8250_DEV_MCA,
  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  */
  68 struct uart_port;
  69 struct uart_8250_port;
  70
  71 int serial8250_register_port(struct uart_port *);
  72 void serial8250_unregister_port(int line);
  73 void serial8250_suspend_port(int line);
  74 void serial8250_resume_port(int line);
  75
  76 extern int early_serial_setup(struct uart_port *port);
  77
  78 extern int serial8250_find_port(struct uart_port *p);
  79 extern int serial8250_find_port_for_earlycon(void);
  80 extern int setup_early_serial8250_console(char *cmdline);
  81 extern void serial8250_do_set_termios(struct uart_port *port,
  82                 struct ktermios *termios, struct ktermios *old);
  83 extern void serial8250_do_pm(struct uart_port *port, unsigned int state,
  84                              unsigned int oldstate);
  85 extern int fsl8250_handle_irq(struct uart_port *port);
  86 int serial8250_handle_irq(struct uart_port *port, unsigned int iir);
  87 unsigned char serial8250_rx_chars(struct uart_8250_port *up, unsigned char lsr);
  88 void serial8250_tx_chars(struct uart_8250_port *up);
  89 unsigned int serial8250_modem_status(struct uart_8250_port *up);
  90
  91 extern void serial8250_set_isa_configurator(void (*v)
  92                                         (int port, struct uart_port *up,
  93                                                 unsigned short *capabilities));
  94
  95 #endif