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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 */