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 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 };
  32
  33 /*
  34  * Allocate 8250 platform device IDs.  Nothing is implied by
  35  * the numbering here, except for the legacy entry being -1.
  36  */
  37 enum {
  38         PLAT8250_DEV_LEGACY = -1,
  39         PLAT8250_DEV_PLATFORM,
  40         PLAT8250_DEV_PLATFORM1,
  41         PLAT8250_DEV_PLATFORM2,
  42         PLAT8250_DEV_FOURPORT,
  43         PLAT8250_DEV_ACCENT,
  44         PLAT8250_DEV_BOCA,
  45         PLAT8250_DEV_EXAR_ST16C554,
  46         PLAT8250_DEV_HUB6,
  47         PLAT8250_DEV_MCA,
  48         PLAT8250_DEV_AU1X00,
  49 };
  50
  51 /*
  52  * This should be used by drivers which want to register
  53  * their own 8250 ports without registering their own
  54  * platform device.  Using these will make your driver
  55  * dependent on the 8250 driver.
  56  */
  57 struct uart_port;
  58
  59 int serial8250_register_port(struct uart_port *);
  60 void serial8250_unregister_port(int line);
  61 void serial8250_suspend_port(int line);
  62 void serial8250_resume_port(int line);
  63
  64 extern int early_serial_setup(struct uart_port *port);
  65
  66 extern int serial8250_find_port(struct uart_port *p);
  67 extern int serial8250_find_port_for_earlycon(void);
  68 extern int setup_early_serial8250_console(char *cmdline);
  69
  70 #endif