2 * include/linux/serial.h
4 * Copyright (C) 1992 by Theodore Ts'o.
6 * Redistribution of this file is permitted under the terms of the GNU
10 #ifndef _LINUX_SERIAL_H
11 #define _LINUX_SERIAL_H
13 #include <linux/types.h>
19 * Counters of the input lines (CTS, DSR, RI, CD) interrupts
23 __u32 cts, dsr, rng, dcd, tx, rx;
24 __u32 frame, parity, overrun, brk;
29 * The size of the serial xmit buffer is 1 page, or 4096 bytes
31 #define SERIAL_XMIT_SIZE PAGE_SIZE
35 struct serial_struct {
44 unsigned short close_delay;
46 char reserved_char[1];
48 unsigned short closing_wait; /* time to wait before closing */
49 unsigned short closing_wait2; /* no longer used... */
50 unsigned char *iomem_base;
51 unsigned short iomem_reg_shift;
52 unsigned int port_high;
53 unsigned long iomap_base; /* cookie passed into ioremap */
57 * For the close wait times, 0 means wait forever for serial port to
58 * flush its output. 65535 means don't wait at all.
60 #define ASYNC_CLOSING_WAIT_INF 0
61 #define ASYNC_CLOSING_WAIT_NONE 65535
64 * These are the supported serial types.
66 #define PORT_UNKNOWN 0
71 #define PORT_CIRRUS 5 /* usurped by cyclades.c */
73 #define PORT_16650V2 7
75 #define PORT_STARTECH 9 /* usurped by cyclades.c */
76 #define PORT_16C950 10 /* Oxford Semiconductor */
79 #define PORT_RSA 13 /* RSA-DV II/S card */
82 #define SERIAL_IO_PORT 0
83 #define SERIAL_IO_HUB6 1
84 #define SERIAL_IO_MEM 2
86 struct serial_uart_config {
88 int dfl_xmit_fifo_size;
92 #define UART_CLEAR_FIFO 0x01
93 #define UART_USE_FIFO 0x02
94 #define UART_STARTECH 0x04
95 #define UART_NATSEMI 0x08
98 * Definitions for async_struct (and serial_struct) flags field
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 */
106 #define ASYNC_SPD_MASK 0x1030
107 #define ASYNC_SPD_HI 0x0010 /* Use 56000 instead of 38400 bps */
109 #define ASYNC_SPD_VHI 0x0020 /* Use 115200 instead of 38400 bps */
110 #define ASYNC_SPD_CUST 0x0030 /* Use user-specified divisor */
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 */
118 #define ASYNC_HARDPPS_CD 0x0800 /* Call hardpps when CD goes high */
120 #define ASYNC_SPD_SHI 0x1000 /* Use 230400 instead of 38400 bps */
121 #define ASYNC_SPD_WARP 0x1010 /* Use 460800 instead of 38400 bps */
123 #define ASYNC_LOW_LATENCY 0x2000 /* Request low latency behaviour */
125 #define ASYNC_BUGGY_UART 0x4000 /* This is a buggy UART, skip some safety
126 * checks. Note: can be dangerous! */
128 #define ASYNC_AUTOPROBE 0x8000 /* Port was autoprobed by PCI or PNP code */
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 */
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 */
145 #define ASYNC_BOOT_ONLYMCA 0x00400000 /* Probe only if MCA bus */
146 #define ASYNC_INTERNAL_FLAGS 0xFFC00000 /* Internal flags */
149 * Multiport serial configuration structure --- external structure
151 struct serial_multiport_struct {
154 unsigned char mask1, match1;
156 unsigned char mask2, match2;
158 unsigned char mask3, match3;
160 unsigned char mask4, match4;
166 * Serial input interrupt line counters -- external structure
167 * Four lines can interrupt: CTS, DSR, RI, DCD
169 struct serial_icounter_struct {
170 int cts, dsr, rng, dcd;
172 int frame, overrun, parity, brk;
178 * Serial interface for controlling RS485 settings on chips with suitable
179 * support. Set with TIOCSRS485 and get with TIOCGRS485 if supported by your
180 * platform. The set function returns the new state, with any unsupported bits
181 * reverted appropriately.
184 struct serial_rs485 {
185 __u32 flags; /* RS485 feature flags */
186 #define SER_RS485_ENABLED (1 << 0)
187 #define SER_RS485_RTS_ON_SEND (1 << 1)
188 #define SER_RS485_RTS_AFTER_SEND (1 << 2)
189 __u32 delay_rts_before_send; /* Milliseconds */
190 __u32 padding[6]; /* Memory is cheap, new structs
191 are a royal PITA .. */
195 #include <linux/compiler.h>
197 #endif /* __KERNEL__ */
198 #endif /* _LINUX_SERIAL_H */