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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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 <asm/page.h>
15
16/*
17 * Counters of the input lines (CTS, DSR, RI, CD) interrupts
18 */
19
20struct async_icount {
21 __u32 cts, dsr, rng, dcd, tx, rx;
22 __u32 frame, parity, overrun, brk;
23 __u32 buf_overrun;
24};
25
26/*
27 * The size of the serial xmit buffer is 1 page, or 4096 bytes
28 */
29#define SERIAL_XMIT_SIZE PAGE_SIZE
30
31#endif
32
33struct serial_struct {
34 int type;
35 int line;
36 unsigned int port;
37 int irq;
38 int flags;
39 int xmit_fifo_size;
40 int custom_divisor;
41 int baud_base;
42 unsigned short close_delay;
43 char io_type;
44 char reserved_char[1];
45 int hub6;
46 unsigned short closing_wait; /* time to wait before closing */
47 unsigned short closing_wait2; /* no longer used... */
48 unsigned char *iomem_base;
49 unsigned short iomem_reg_shift;
50 unsigned int port_high;
51 unsigned long iomap_base; /* cookie passed into ioremap */
52};
53
54/*
55 * For the close wait times, 0 means wait forever for serial port to
56 * flush its output. 65535 means don't wait at all.
57 */
58#define ASYNC_CLOSING_WAIT_INF 0
59#define ASYNC_CLOSING_WAIT_NONE 65535
60
61/*
62 * These are the supported serial types.
63 */
64#define PORT_UNKNOWN 0
65#define PORT_8250 1
66#define PORT_16450 2
67#define PORT_16550 3
68#define PORT_16550A 4
69#define PORT_CIRRUS 5 /* usurped by cyclades.c */
70#define PORT_16650 6
71#define PORT_16650V2 7
72#define PORT_16750 8
73#define PORT_STARTECH 9 /* usurped by cyclades.c */
74#define PORT_16C950 10 /* Oxford Semiconductor */
75#define PORT_16654 11
76#define PORT_16850 12
77#define PORT_RSA 13 /* RSA-DV II/S card */
78#define PORT_MAX 13
79
80#define SERIAL_IO_PORT 0
81#define SERIAL_IO_HUB6 1
82#define SERIAL_IO_MEM 2
83
84struct serial_uart_config {
85 char *name;
86 int dfl_xmit_fifo_size;
87 int flags;
88};
89
90#define UART_CLEAR_FIFO 0x01
91#define UART_USE_FIFO 0x02
92#define UART_STARTECH 0x04
93#define UART_NATSEMI 0x08
94
95/*
96 * Definitions for async_struct (and serial_struct) flags field
97 */
98#define ASYNC_HUP_NOTIFY 0x0001 /* Notify getty on hangups and closes
99 on the callout port */
100#define ASYNC_FOURPORT 0x0002 /* Set OU1, OUT2 per AST Fourport settings */
101#define ASYNC_SAK 0x0004 /* Secure Attention Key (Orange book) */
102#define ASYNC_SPLIT_TERMIOS 0x0008 /* Separate termios for dialin/callout */
103
104#define ASYNC_SPD_MASK 0x1030
105#define ASYNC_SPD_HI 0x0010 /* Use 56000 instead of 38400 bps */
106
107#define ASYNC_SPD_VHI 0x0020 /* Use 115200 instead of 38400 bps */
108#define ASYNC_SPD_CUST 0x0030 /* Use user-specified divisor */
109
110#define ASYNC_SKIP_TEST 0x0040 /* Skip UART test during autoconfiguration */
111#define ASYNC_AUTO_IRQ 0x0080 /* Do automatic IRQ during autoconfiguration */
112#define ASYNC_SESSION_LOCKOUT 0x0100 /* Lock out cua opens based on session */
113#define ASYNC_PGRP_LOCKOUT 0x0200 /* Lock out cua opens based on pgrp */
114#define ASYNC_CALLOUT_NOHUP 0x0400 /* Don't do hangups for cua device */
115
116#define ASYNC_HARDPPS_CD 0x0800 /* Call hardpps when CD goes high */
117
118#define ASYNC_SPD_SHI 0x1000 /* Use 230400 instead of 38400 bps */
119#define ASYNC_SPD_WARP 0x1010 /* Use 460800 instead of 38400 bps */
120
121#define ASYNC_LOW_LATENCY 0x2000 /* Request low latency behaviour */
122
123#define ASYNC_BUGGY_UART 0x4000 /* This is a buggy UART, skip some safety
124 * checks. Note: can be dangerous! */
125
126#define ASYNC_AUTOPROBE 0x8000 /* Port was autoprobed by PCI or PNP code */
127
128#define ASYNC_FLAGS 0x7FFF /* Possible legal async flags */
129#define ASYNC_USR_MASK 0x3430 /* Legal flags that non-privileged
130 * users can set or reset */
131
132/* Internal flags used only by kernel/chr_drv/serial.c */
133#define ASYNC_INITIALIZED 0x80000000 /* Serial port was initialized */
134#define ASYNC_NORMAL_ACTIVE 0x20000000 /* Normal device is active */
135#define ASYNC_BOOT_AUTOCONF 0x10000000 /* Autoconfigure port on bootup */
136#define ASYNC_CLOSING 0x08000000 /* Serial port is closing */
137#define ASYNC_CTS_FLOW 0x04000000 /* Do CTS flow control */
138#define ASYNC_CHECK_CD 0x02000000 /* i.e., CLOCAL */
139#define ASYNC_SHARE_IRQ 0x01000000 /* for multifunction cards
140 --- no longer used */
141#define ASYNC_CONS_FLOW 0x00800000 /* flow control for console */
142
143#define ASYNC_BOOT_ONLYMCA 0x00400000 /* Probe only if MCA bus */
144#define ASYNC_INTERNAL_FLAGS 0xFFC00000 /* Internal flags */
145
146/*
147 * Multiport serial configuration structure --- external structure
148 */
149struct serial_multiport_struct {
150 int irq;
151 int port1;
152 unsigned char mask1, match1;
153 int port2;
154 unsigned char mask2, match2;
155 int port3;
156 unsigned char mask3, match3;
157 int port4;
158 unsigned char mask4, match4;
159 int port_monitor;
160 int reserved[32];
161};
162
163/*
164 * Serial input interrupt line counters -- external structure
165 * Four lines can interrupt: CTS, DSR, RI, DCD
166 */
167struct serial_icounter_struct {
168 int cts, dsr, rng, dcd;
169 int rx, tx;
170 int frame, overrun, parity, brk;
171 int buf_overrun;
172 int reserved[9];
173};
174
175
176#ifdef __KERNEL__
177/* Export to allow PCMCIA to use this - Dave Hinds */
178extern int register_serial(struct serial_struct *req);
179extern void unregister_serial(int line);
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 */