228 lines
7.2 KiB
C
228 lines
7.2 KiB
C
/*
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* include/linux/serial.h
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*
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* Copyright (C) 1992 by Theodore Ts'o.
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*
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* Redistribution of this file is permitted under the terms of the GNU
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* Public License (GPL)
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*/
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#ifndef _LINUX_SERIAL_H
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#define _LINUX_SERIAL_H
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#include <linux/types.h>
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#ifdef __KERNEL__
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#include <asm/page.h>
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/*
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* Counters of the input lines (CTS, DSR, RI, CD) interrupts
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*/
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struct async_icount {
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__u32 cts, dsr, rng, dcd, tx, rx;
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__u32 frame, parity, overrun, brk;
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__u32 buf_overrun;
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};
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/*
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* The size of the serial xmit buffer is 1 page, or 4096 bytes
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*/
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#define SERIAL_XMIT_SIZE PAGE_SIZE
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#endif
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struct serial_struct {
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int type;
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int line;
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unsigned int port;
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int irq;
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int flags;
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int xmit_fifo_size;
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int custom_divisor;
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int baud_base;
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unsigned short close_delay;
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char io_type;
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char reserved_char[1];
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int hub6;
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unsigned short closing_wait; /* time to wait before closing */
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unsigned short closing_wait2; /* no longer used... */
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unsigned char *iomem_base;
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unsigned short iomem_reg_shift;
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unsigned int port_high;
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unsigned long iomap_base; /* cookie passed into ioremap */
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};
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/*
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* For the close wait times, 0 means wait forever for serial port to
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* flush its output. 65535 means don't wait at all.
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*/
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#define ASYNC_CLOSING_WAIT_INF 0
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#define ASYNC_CLOSING_WAIT_NONE 65535
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/*
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* These are the supported serial types.
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*/
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#define PORT_UNKNOWN 0
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#define PORT_8250 1
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#define PORT_16450 2
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#define PORT_16550 3
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#define PORT_16550A 4
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#define PORT_CIRRUS 5 /* usurped by cyclades.c */
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#define PORT_16650 6
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#define PORT_16650V2 7
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#define PORT_16750 8
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#define PORT_STARTECH 9 /* usurped by cyclades.c */
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#define PORT_16C950 10 /* Oxford Semiconductor */
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#define PORT_16654 11
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#define PORT_16850 12
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#define PORT_RSA 13 /* RSA-DV II/S card */
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#define PORT_MAX 13
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#define SERIAL_IO_PORT 0
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#define SERIAL_IO_HUB6 1
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#define SERIAL_IO_MEM 2
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struct serial_uart_config {
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char *name;
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int dfl_xmit_fifo_size;
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int flags;
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};
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#define UART_CLEAR_FIFO 0x01
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#define UART_USE_FIFO 0x02
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#define UART_STARTECH 0x04
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#define UART_NATSEMI 0x08
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/*
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* Definitions for async_struct (and serial_struct) flags field
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*
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* Define ASYNCB_* for convenient use with {test,set,clear}_bit.
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*/
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#define ASYNCB_HUP_NOTIFY 0 /* Notify getty on hangups and closes
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* on the callout port */
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#define ASYNCB_FOURPORT 1 /* Set OU1, OUT2 per AST Fourport settings */
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#define ASYNCB_SAK 2 /* Secure Attention Key (Orange book) */
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#define ASYNCB_SPLIT_TERMIOS 3 /* Separate termios for dialin/callout */
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#define ASYNCB_SPD_HI 4 /* Use 56000 instead of 38400 bps */
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#define ASYNCB_SPD_VHI 5 /* Use 115200 instead of 38400 bps */
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#define ASYNCB_SKIP_TEST 6 /* Skip UART test during autoconfiguration */
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#define ASYNCB_AUTO_IRQ 7 /* Do automatic IRQ during
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* autoconfiguration */
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#define ASYNCB_SESSION_LOCKOUT 8 /* Lock out cua opens based on session */
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#define ASYNCB_PGRP_LOCKOUT 9 /* Lock out cua opens based on pgrp */
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#define ASYNCB_CALLOUT_NOHUP 10 /* Don't do hangups for cua device */
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#define ASYNCB_HARDPPS_CD 11 /* Call hardpps when CD goes high */
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#define ASYNCB_SPD_SHI 12 /* Use 230400 instead of 38400 bps */
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#define ASYNCB_LOW_LATENCY 13 /* Request low latency behaviour */
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#define ASYNCB_BUGGY_UART 14 /* This is a buggy UART, skip some safety
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* checks. Note: can be dangerous! */
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#define ASYNCB_AUTOPROBE 15 /* Port was autoprobed by PCI or PNP code */
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#define ASYNCB_LAST_USER 15
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/* Internal flags used only by kernel */
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#define ASYNCB_INITIALIZED 31 /* Serial port was initialized */
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#define ASYNCB_SUSPENDED 30 /* Serial port is suspended */
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#define ASYNCB_NORMAL_ACTIVE 29 /* Normal device is active */
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#define ASYNCB_BOOT_AUTOCONF 28 /* Autoconfigure port on bootup */
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#define ASYNCB_CLOSING 27 /* Serial port is closing */
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#define ASYNCB_CTS_FLOW 26 /* Do CTS flow control */
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#define ASYNCB_CHECK_CD 25 /* i.e., CLOCAL */
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#define ASYNCB_SHARE_IRQ 24 /* for multifunction cards, no longer used */
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#define ASYNCB_CONS_FLOW 23 /* flow control for console */
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#define ASYNCB_BOOT_ONLYMCA 22 /* Probe only if MCA bus */
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#define ASYNCB_FIRST_KERNEL 22
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#define ASYNC_HUP_NOTIFY (1U << ASYNCB_HUP_NOTIFY)
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#define ASYNC_SUSPENDED (1U << ASYNCB_SUSPENDED)
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#define ASYNC_FOURPORT (1U << ASYNCB_FOURPORT)
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#define ASYNC_SAK (1U << ASYNCB_SAK)
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#define ASYNC_SPLIT_TERMIOS (1U << ASYNCB_SPLIT_TERMIOS)
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#define ASYNC_SPD_HI (1U << ASYNCB_SPD_HI)
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#define ASYNC_SPD_VHI (1U << ASYNCB_SPD_VHI)
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#define ASYNC_SKIP_TEST (1U << ASYNCB_SKIP_TEST)
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#define ASYNC_AUTO_IRQ (1U << ASYNCB_AUTO_IRQ)
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#define ASYNC_SESSION_LOCKOUT (1U << ASYNCB_SESSION_LOCKOUT)
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#define ASYNC_PGRP_LOCKOUT (1U << ASYNCB_PGRP_LOCKOUT)
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#define ASYNC_CALLOUT_NOHUP (1U << ASYNCB_CALLOUT_NOHUP)
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#define ASYNC_HARDPPS_CD (1U << ASYNCB_HARDPPS_CD)
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#define ASYNC_SPD_SHI (1U << ASYNCB_SPD_SHI)
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#define ASYNC_LOW_LATENCY (1U << ASYNCB_LOW_LATENCY)
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#define ASYNC_BUGGY_UART (1U << ASYNCB_BUGGY_UART)
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#define ASYNC_AUTOPROBE (1U << ASYNCB_AUTOPROBE)
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#define ASYNC_FLAGS ((1U << (ASYNCB_LAST_USER + 1)) - 1)
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#define ASYNC_USR_MASK (ASYNC_SPD_HI|ASYNC_SPD_VHI| \
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ASYNC_CALLOUT_NOHUP|ASYNC_SPD_SHI|ASYNC_LOW_LATENCY)
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#define ASYNC_SPD_CUST (ASYNC_SPD_HI|ASYNC_SPD_VHI)
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#define ASYNC_SPD_WARP (ASYNC_SPD_HI|ASYNC_SPD_SHI)
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#define ASYNC_SPD_MASK (ASYNC_SPD_HI|ASYNC_SPD_VHI|ASYNC_SPD_SHI)
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#define ASYNC_INITIALIZED (1U << ASYNCB_INITIALIZED)
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#define ASYNC_NORMAL_ACTIVE (1U << ASYNCB_NORMAL_ACTIVE)
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#define ASYNC_BOOT_AUTOCONF (1U << ASYNCB_BOOT_AUTOCONF)
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#define ASYNC_CLOSING (1U << ASYNCB_CLOSING)
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#define ASYNC_CTS_FLOW (1U << ASYNCB_CTS_FLOW)
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#define ASYNC_CHECK_CD (1U << ASYNCB_CHECK_CD)
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#define ASYNC_SHARE_IRQ (1U << ASYNCB_SHARE_IRQ)
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#define ASYNC_CONS_FLOW (1U << ASYNCB_CONS_FLOW)
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#define ASYNC_BOOT_ONLYMCA (1U << ASYNCB_BOOT_ONLYMCA)
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#define ASYNC_INTERNAL_FLAGS (~((1U << ASYNCB_FIRST_KERNEL) - 1))
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/*
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* Multiport serial configuration structure --- external structure
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*/
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struct serial_multiport_struct {
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int irq;
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int port1;
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unsigned char mask1, match1;
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int port2;
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unsigned char mask2, match2;
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int port3;
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unsigned char mask3, match3;
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int port4;
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unsigned char mask4, match4;
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int port_monitor;
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int reserved[32];
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};
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/*
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* Serial input interrupt line counters -- external structure
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* Four lines can interrupt: CTS, DSR, RI, DCD
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*/
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struct serial_icounter_struct {
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int cts, dsr, rng, dcd;
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int rx, tx;
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int frame, overrun, parity, brk;
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int buf_overrun;
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int reserved[9];
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};
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/*
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* Serial interface for controlling RS485 settings on chips with suitable
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* support. Set with TIOCSRS485 and get with TIOCGRS485 if supported by your
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* platform. The set function returns the new state, with any unsupported bits
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* reverted appropriately.
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*/
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struct serial_rs485 {
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__u32 flags; /* RS485 feature flags */
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#define SER_RS485_ENABLED (1 << 0) /* If enabled */
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#define SER_RS485_RTS_ON_SEND (1 << 1) /* Logical level for
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RTS pin when
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sending */
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#define SER_RS485_RTS_AFTER_SEND (1 << 2) /* Logical level for
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RTS pin after sent*/
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#define SER_RS485_RX_DURING_TX (1 << 4)
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__u32 delay_rts_before_send; /* Delay before send (milliseconds) */
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__u32 delay_rts_after_send; /* Delay after send (milliseconds) */
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__u32 padding[5]; /* Memory is cheap, new structs
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are a royal PITA .. */
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};
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#ifdef __KERNEL__
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#include <linux/compiler.h>
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#endif /* __KERNEL__ */
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#endif /* _LINUX_SERIAL_H */
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