serial.h
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上传日期:2013-04-10
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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;
- int reserved[1];
- };
- /*
- * 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
- /*
- * 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 complicated architectures to specify rs_table[] at run time */
- extern int early_serial_setup(struct serial_struct *req);
- /* tty port reserved for the HCDP serial console port */
- #define HCDP_SERIAL_CONSOLE_PORT 4
- #endif /* __KERNEL__ */
- #endif /* _LINUX_SERIAL_H */