1/* 2 * include/linux/serial.h 3 * 4 * Copyright (C) 1992 by Theodore Ts'o. 5 * 6 * Redistribution of this file is permitted under the terms of the GNU 7 * Public License (GPL) 8 */ 9 10#ifndef _LINUX_SERIAL_H 11#define _LINUX_SERIAL_H 12 13#ifdef __KERNEL__ 14#include <linux/types.h> 15#include <asm/page.h> 16 17/* 18 * Counters of the input lines (CTS, DSR, RI, CD) interrupts 19 */ 20 21struct async_icount { 22 __u32 cts, dsr, rng, dcd, tx, rx; 23 __u32 frame, parity, overrun, brk; 24 __u32 buf_overrun; 25}; 26 27/* 28 * The size of the serial xmit buffer is 1 page, or 4096 bytes 29 */ 30#define SERIAL_XMIT_SIZE PAGE_SIZE 31 32#endif 33 34struct serial_struct { 35 int type; 36 int line; 37 unsigned int port; 38 int irq; 39 int flags; 40 int xmit_fifo_size; 41 int custom_divisor; 42 int baud_base; 43 unsigned short close_delay; 44 char io_type; 45 char reserved_char[1]; 46 int hub6; 47 unsigned short closing_wait; /* time to wait before closing */ 48 unsigned short closing_wait2; /* no longer used... */ 49 unsigned char *iomem_base; 50 unsigned short iomem_reg_shift; 51 unsigned int port_high; 52 unsigned long iomap_base; /* cookie passed into ioremap */ 53}; 54 55/* 56 * For the close wait times, 0 means wait forever for serial port to 57 * flush its output. 65535 means don't wait at all. 58 */ 59#define ASYNC_CLOSING_WAIT_INF 0 60#define ASYNC_CLOSING_WAIT_NONE 65535 61 62/* 63 * These are the supported serial types. 64 */ 65#define PORT_UNKNOWN 0 66#define PORT_8250 1 67#define PORT_16450 2 68#define PORT_16550 3 69#define PORT_16550A 4 70#define PORT_CIRRUS 5 /* usurped by cyclades.c */ 71#define PORT_16650 6 72#define PORT_16650V2 7 73#define PORT_16750 8 74#define PORT_STARTECH 9 /* usurped by cyclades.c */ 75#define PORT_16C950 10 /* Oxford Semiconductor */ 76#define PORT_16654 11 77#define PORT_16850 12 78#define PORT_RSA 13 /* RSA-DV II/S card */ 79#define PORT_SB1250 14 80#define PORT_MAX 14 81 82#define SERIAL_IO_PORT 0 83#define SERIAL_IO_HUB6 1 84#define SERIAL_IO_MEM 2 85 86struct serial_uart_config { 87 char *name; 88 int dfl_xmit_fifo_size; 89 int flags; 90}; 91 92#define UART_CLEAR_FIFO 0x01 93#define UART_USE_FIFO 0x02 94#define UART_STARTECH 0x04 95#define UART_NATSEMI 0x08 96 97/* 98 * Definitions for async_struct (and serial_struct) flags field 99 */ 100#define ASYNC_HUP_NOTIFY 0x0001 /* Notify getty on hangups and closes 101 on the callout port */ 102#define ASYNC_FOURPORT 0x0002 /* Set OU1, OUT2 per AST Fourport settings */ 103#define ASYNC_SAK 0x0004 /* Secure Attention Key (Orange book) */ 104#define ASYNC_SPLIT_TERMIOS 0x0008 /* Separate termios for dialin/callout */ 105 106#define ASYNC_SPD_MASK 0x1030 107#define ASYNC_SPD_HI 0x0010 /* Use 56000 instead of 38400 bps */ 108 109#define ASYNC_SPD_VHI 0x0020 /* Use 115200 instead of 38400 bps */ 110#define ASYNC_SPD_CUST 0x0030 /* Use user-specified divisor */ 111 112#define ASYNC_SKIP_TEST 0x0040 /* Skip UART test during autoconfiguration */ 113#define ASYNC_AUTO_IRQ 0x0080 /* Do automatic IRQ during autoconfiguration */ 114#define ASYNC_SESSION_LOCKOUT 0x0100 /* Lock out cua opens based on session */ 115#define ASYNC_PGRP_LOCKOUT 0x0200 /* Lock out cua opens based on pgrp */ 116#define ASYNC_CALLOUT_NOHUP 0x0400 /* Don't do hangups for cua device */ 117 118#define ASYNC_HARDPPS_CD 0x0800 /* Call hardpps when CD goes high */ 119 120#define ASYNC_SPD_SHI 0x1000 /* Use 230400 instead of 38400 bps */ 121#define ASYNC_SPD_WARP 0x1010 /* Use 460800 instead of 38400 bps */ 122 123#define ASYNC_LOW_LATENCY 0x2000 /* Request low latency behaviour */ 124 125#define ASYNC_BUGGY_UART 0x4000 /* This is a buggy UART, skip some safety 126 * checks. Note: can be dangerous! */ 127 128#define ASYNC_AUTOPROBE 0x8000 /* Port was autoprobed by PCI or PNP code */ 129 130#define ASYNC_FLAGS 0x7FFF /* Possible legal async flags */ 131#define ASYNC_USR_MASK 0x3430 /* Legal flags that non-privileged 132 * users can set or reset */ 133 134/* Internal flags used only by kernel/chr_drv/serial.c */ 135#define ASYNC_INITIALIZED 0x80000000 /* Serial port was initialized */ 136#define ASYNC_NORMAL_ACTIVE 0x20000000 /* Normal device is active */ 137#define ASYNC_BOOT_AUTOCONF 0x10000000 /* Autoconfigure port on bootup */ 138#define ASYNC_CLOSING 0x08000000 /* Serial port is closing */ 139#define ASYNC_CTS_FLOW 0x04000000 /* Do CTS flow control */ 140#define ASYNC_CHECK_CD 0x02000000 /* i.e., CLOCAL */ 141#define ASYNC_SHARE_IRQ 0x01000000 /* for multifunction cards 142 --- no longer used */ 143#define ASYNC_CONS_FLOW 0x00800000 /* flow control for console */ 144 145#define ASYNC_BOOT_ONLYMCA 0x00400000 /* Probe only if MCA bus */ 146#define ASYNC_INTERNAL_FLAGS 0xFFC00000 /* Internal flags */ 147 148/* 149 * Multiport serial configuration structure --- external structure 150 */ 151struct serial_multiport_struct { 152 int irq; 153 int port1; 154 unsigned char mask1, match1; 155 int port2; 156 unsigned char mask2, match2; 157 int port3; 158 unsigned char mask3, match3; 159 int port4; 160 unsigned char mask4, match4; 161 int port_monitor; 162 int reserved[32]; 163}; 164 165/* 166 * Serial input interrupt line counters -- external structure 167 * Four lines can interrupt: CTS, DSR, RI, DCD 168 */ 169struct serial_icounter_struct { 170 int cts, dsr, rng, dcd; 171 int rx, tx; 172 int frame, overrun, parity, brk; 173 int buf_overrun; 174 int reserved[9]; 175}; 176 177 178#ifdef __KERNEL__ 179#include <linux/compiler.h> 180 181/* Allow architectures to override entries in serial8250_ports[] at run time: */ 182struct uart_port; /* forward declaration */ 183extern int early_serial_setup(struct uart_port *port); 184extern int early_serial_console_init(char *options); 185extern int serial8250_start_console(struct uart_port *port, char *options); 186 187#endif /* __KERNEL__ */ 188#endif /* _LINUX_SERIAL_H */ 189