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 <asm/page.h>
15
16 /*
17 * Counters of the input lines (CTS, DSR, RI, CD) interrupts
18 */
19
20 struct 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
33 struct 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 int reserved[1];
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 #define SERIAL_IO_GSC 3
84
85 struct serial_uart_config {
86 char *name;
87 int dfl_xmit_fifo_size;
88 int flags;
89 };
90
91 #define UART_CLEAR_FIFO 0x01
92 #define UART_USE_FIFO 0x02
93 #define UART_STARTECH 0x04
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_CALLOUT_ACTIVE 0x40000000 /* Call out device is active */
135 #define ASYNC_NORMAL_ACTIVE 0x20000000 /* Normal device is active */
136 #define ASYNC_BOOT_AUTOCONF 0x10000000 /* Autoconfigure port on bootup */
137 #define ASYNC_CLOSING 0x08000000 /* Serial port is closing */
138 #define ASYNC_CTS_FLOW 0x04000000 /* Do CTS flow control */
139 #define ASYNC_CHECK_CD 0x02000000 /* i.e., CLOCAL */
140 #define ASYNC_SHARE_IRQ 0x01000000 /* for multifunction cards
141 --- no longer used */
142
143 #define ASYNC_INTERNAL_FLAGS 0xFF000000 /* Internal flags */
144
145 /*
146 * Multiport serial configuration structure --- external structure
147 */
148 struct serial_multiport_struct {
149 int irq;
150 int port1;
151 unsigned char mask1, match1;
152 int port2;
153 unsigned char mask2, match2;
154 int port3;
155 unsigned char mask3, match3;
156 int port4;
157 unsigned char mask4, match4;
158 int port_monitor;
159 int reserved[32];
160 };
161
162 /*
163 * Serial input interrupt line counters -- external structure
164 * Four lines can interrupt: CTS, DSR, RI, DCD
165 */
166 struct serial_icounter_struct {
167 int cts, dsr, rng, dcd;
168 int rx, tx;
169 int frame, overrun, parity, brk;
170 int buf_overrun;
171 int reserved[9];
172 };
173
174
175 #ifdef __KERNEL__
176 /* Export to allow PCMCIA to use this - Dave Hinds */
177 extern int register_serial(struct serial_struct *req);
178 extern void unregister_serial(int line);
179
180 #endif /* __KERNEL__ */
181 #endif /* _LINUX_SERIAL_H */
182
This page was automatically generated by the
LXR engine.
Visit the LXR main site for more
information.