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/*

 * include/linux/serial.h

 *

 * Copyright (C) 1992 by Theodore Ts'o.

 *

 * Redistribution of this file is permitted under the terms of the GNU

 * Public License (GPL)

 */

#ifndef _LINUX_SERIAL_H

#define _LINUX_SERIAL_H

#ifdef __KERNEL__

#include <asm/page.h>

/*

 * Counters of the input lines (CTS, DSR, RI, CD) interrupts

 */

struct async_icount {

        __u32   cts, dsr, rng, dcd, tx, rx;

        __u32   frame, parity, overrun, brk;

        __u32   buf_overrun;

};

/*

 * The size of the serial xmit buffer is 1 page, or 4096 bytes

 */

#define SERIAL_XMIT_SIZE PAGE_SIZE

#endif

struct serial_struct {

        int     type;

        int     line;

        unsigned int    port;

        int     irq;

        int     flags;

        int     xmit_fifo_size;

        int     custom_divisor;

        int     baud_base;

        unsigned short  close_delay;

        char    io_type;

        char    reserved_char[1];

        int     hub6;

        unsigned short  closing_wait; /* time to wait before closing */

        unsigned short  closing_wait2; /* no longer used... */

        unsigned char   *iomem_base;

        unsigned short  iomem_reg_shift;

        unsigned int    port_high;

        unsigned long   iomap_base;     /* cookie passed into ioremap */

};

/*

 * For the close wait times, 0 means wait forever for serial port to

 * flush its output.  65535 means don't wait at all.

 */

#define ASYNC_CLOSING_WAIT_INF  0

#define ASYNC_CLOSING_WAIT_NONE 65535

/*

 * These are the supported serial types.

 */

#define PORT_UNKNOWN    0

#define PORT_8250       1

#define PORT_16450      2

#define PORT_16550      3

#define PORT_16550A     4

#define PORT_CIRRUS     5       /* usurped by cyclades.c */

#define PORT_16650      6

#define PORT_16650V2    7

#define PORT_16750      8

#define PORT_STARTECH   9       /* usurped by cyclades.c */

#define PORT_16C950     10      /* Oxford Semiconductor */

#define PORT_16654      11

#define PORT_16850      12

#define PORT_RSA        13      /* RSA-DV II/S card */

#define PORT_MAX        13

#define SERIAL_IO_PORT  0

#define SERIAL_IO_HUB6  1

#define SERIAL_IO_MEM   2

struct serial_uart_config {

        char    *name;

        int     dfl_xmit_fifo_size;

        int     flags;

};

#define UART_CLEAR_FIFO         0x01

#define UART_USE_FIFO           0x02

#define UART_STARTECH           0x04

#define UART_NATSEMI            0x08

/*

 * Definitions for async_struct (and serial_struct) flags field

 */

#define ASYNC_HUP_NOTIFY 0x0001 /* Notify getty on hangups and closes 

                                   on the callout port */

#define ASYNC_FOURPORT  0x0002  /* Set OU1, OUT2 per AST Fourport settings */

#define ASYNC_SAK       0x0004  /* Secure Attention Key (Orange book) */

#define ASYNC_SPLIT_TERMIOS 0x0008 /* Separate termios for dialin/callout */

#define ASYNC_SPD_MASK  0x1030

#define ASYNC_SPD_HI    0x0010  /* Use 56000 instead of 38400 bps */

#define ASYNC_SPD_VHI   0x0020  /* Use 115200 instead of 38400 bps */

#define ASYNC_SPD_CUST  0x0030  /* Use user-specified divisor */

#define ASYNC_SKIP_TEST 0x0040 /* Skip UART test during autoconfiguration */

#define ASYNC_AUTO_IRQ  0x0080 /* Do automatic IRQ during autoconfiguration */

#define ASYNC_SESSION_LOCKOUT 0x0100 /* Lock out cua opens based on session */

#define ASYNC_PGRP_LOCKOUT    0x0200 /* Lock out cua opens based on pgrp */

#define ASYNC_CALLOUT_NOHUP   0x0400 /* Don't do hangups for cua device */

#define ASYNC_HARDPPS_CD        0x0800  /* Call hardpps when CD goes high  */

#define ASYNC_SPD_SHI   0x1000  /* Use 230400 instead of 38400 bps */

#define ASYNC_SPD_WARP  0x1010  /* Use 460800 instead of 38400 bps */

#define ASYNC_LOW_LATENCY 0x2000 /* Request low latency behaviour */

#define ASYNC_BUGGY_UART  0x4000 /* This is a buggy UART, skip some safety

                                  * checks.  Note: can be dangerous! */

#define ASYNC_AUTOPROBE  0x8000 /* Port was autoprobed by PCI or PNP code */

#define ASYNC_FLAGS     0x7FFF  /* Possible legal async flags */

#define ASYNC_USR_MASK  0x3430  /* Legal flags that non-privileged

                                 * users can set or reset */

/* Internal flags used only by kernel/chr_drv/serial.c */

#define ASYNC_INITIALIZED       0x80000000 /* Serial port was initialized */

#define ASYNC_CALLOUT_ACTIVE    0x40000000 /* Call out device is active */

#define ASYNC_NORMAL_ACTIVE     0x20000000 /* Normal device is active */

#define ASYNC_BOOT_AUTOCONF     0x10000000 /* Autoconfigure port on bootup */

#define ASYNC_CLOSING           0x08000000 /* Serial port is closing */

#define ASYNC_CTS_FLOW          0x04000000 /* Do CTS flow control */

#define ASYNC_CHECK_CD          0x02000000 /* i.e., CLOCAL */

#define ASYNC_SHARE_IRQ         0x01000000 /* for multifunction cards

                                             --- no longer used */

#define ASYNC_CONS_FLOW         0x00800000 /* flow control for console  */

#define ASYNC_BOOT_ONLYMCA      0x00400000 /* Probe only if MCA bus */

#define ASYNC_INTERNAL_FLAGS    0xFFC00000 /* Internal flags */

/*

 * Multiport serial configuration structure --- external structure

 */

struct serial_multiport_struct {

        int             irq;

        int             port1;

        unsigned char   mask1, match1;

        int             port2;

        unsigned char   mask2, match2;

        int             port3;

        unsigned char   mask3, match3;

        int             port4;

        unsigned char   mask4, match4;

        int             port_monitor;

        int     reserved[32];

};

/*

 * Serial input interrupt line counters -- external structure

 * Four lines can interrupt: CTS, DSR, RI, DCD

 */

struct serial_icounter_struct {

        int cts, dsr, rng, dcd;

        int rx, tx;

        int frame, overrun, parity, brk;

        int buf_overrun;

        int reserved[9];

};

#ifdef __KERNEL__

/* Export to allow PCMCIA to use this - Dave Hinds */

extern int register_serial(struct serial_struct *req);

extern void unregister_serial(int line);

/* Allow architectures to override entries in serial8250_ports[] at run time: */

struct uart_port;       /* forward declaration */

extern int early_serial_setup(struct uart_port *port);

#endif /* __KERNEL__ */

#endif /* _LINUX_SERIAL_H */