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 };
  36
  37 /*
  38  * Allocate 8250 platform device IDs.  Nothing is implied by
  39  * the numbering here, except for the legacy entry being -1.
  40  */
  41 enum {
  42         PLAT8250_DEV_LEGACY = -1,
  43         PLAT8250_DEV_PLATFORM,
  44         PLAT8250_DEV_PLATFORM1,
  45         PLAT8250_DEV_PLATFORM2,
  46         PLAT8250_DEV_FOURPORT,
  47         PLAT8250_DEV_ACCENT,
  48         PLAT8250_DEV_BOCA,
  49         PLAT8250_DEV_EXAR_ST16C554,
  50         PLAT8250_DEV_HUB6,
  51         PLAT8250_DEV_MCA,
  52         PLAT8250_DEV_AU1X00,
  53         PLAT8250_DEV_SM501,
  54 };
  55
  56 /*
  57  * This should be used by drivers which want to register
  58  * their own 8250 ports without registering their own
  59  * platform device.  Using these will make your driver
  60  * dependent on the 8250 driver.
  61  */
  62 struct uart_port;
  63
  64 int serial8250_register_port(struct uart_port *);
  65 void serial8250_unregister_port(int line);
  66 void serial8250_suspend_port(int line);
  67 void serial8250_resume_port(int line);
  68
  69 extern int early_serial_setup(struct uart_port *port);
  70
  71 extern int serial8250_find_port(struct uart_port *p);
  72 extern int serial8250_find_port_for_earlycon(void);
  73 extern int setup_early_serial8250_console(char *cmdline);
  74
  75 #endif