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
17 * Counters of the input lines (CTS, DSR, RI, CD) interrupts
21 __u32 cts, dsr, rng, dcd, tx, rx;
22 __u32 frame, parity, overrun, brk;
27 * The size of the serial xmit buffer is 1 page, or 4096 bytes
29 #define SERIAL_XMIT_SIZE PAGE_SIZE
33 struct serial_struct {
42 unsigned short close_delay;
44 char reserved_char[1];
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 */
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.
59 #define ASYNC_CLOSING_WAIT_INF 0
60 #define ASYNC_CLOSING_WAIT_NONE 65535
63 * These are the supported serial types.
65 #define PORT_UNKNOWN 0
70 #define PORT_CIRRUS 5 /* usurped by cyclades.c */
72 #define PORT_16650V2 7
74 #define PORT_STARTECH 9 /* usurped by cyclades.c */
75 #define PORT_16C950 10 /* Oxford Semiconductor */
78 #define PORT_RSA 13 /* RSA-DV II/S card */
81 #define SERIAL_IO_PORT 0
82 #define SERIAL_IO_HUB6 1
83 #define SERIAL_IO_MEM 2
85 struct serial_uart_config {
87 int dfl_xmit_fifo_size;
91 #define UART_CLEAR_FIFO 0x01
92 #define UART_USE_FIFO 0x02
93 #define UART_STARTECH 0x04
94 #define UART_NATSEMI 0x08
97 * Definitions for async_struct (and serial_struct) flags field
99 #define ASYNC_HUP_NOTIFY 0x0001 /* Notify getty on hangups and closes
100 on the callout port */
101 #define ASYNC_FOURPORT 0x0002 /* Set OU1, OUT2 per AST Fourport settings */
102 #define ASYNC_SAK 0x0004 /* Secure Attention Key (Orange book) */
103 #define ASYNC_SPLIT_TERMIOS 0x0008 /* Separate termios for dialin/callout */
105 #define ASYNC_SPD_MASK 0x1030
106 #define ASYNC_SPD_HI 0x0010 /* Use 56000 instead of 38400 bps */
108 #define ASYNC_SPD_VHI 0x0020 /* Use 115200 instead of 38400 bps */
109 #define ASYNC_SPD_CUST 0x0030 /* Use user-specified divisor */
111 #define ASYNC_SKIP_TEST 0x0040 /* Skip UART test during autoconfiguration */
112 #define ASYNC_AUTO_IRQ 0x0080 /* Do automatic IRQ during autoconfiguration */
113 #define ASYNC_SESSION_LOCKOUT 0x0100 /* Lock out cua opens based on session */
114 #define ASYNC_PGRP_LOCKOUT 0x0200 /* Lock out cua opens based on pgrp */
115 #define ASYNC_CALLOUT_NOHUP 0x0400 /* Don't do hangups for cua device */
117 #define ASYNC_HARDPPS_CD 0x0800 /* Call hardpps when CD goes high */
119 #define ASYNC_SPD_SHI 0x1000 /* Use 230400 instead of 38400 bps */
120 #define ASYNC_SPD_WARP 0x1010 /* Use 460800 instead of 38400 bps */
122 #define ASYNC_LOW_LATENCY 0x2000 /* Request low latency behaviour */
124 #define ASYNC_BUGGY_UART 0x4000 /* This is a buggy UART, skip some safety
125 * checks. Note: can be dangerous! */
127 #define ASYNC_AUTOPROBE 0x8000 /* Port was autoprobed by PCI or PNP code */
129 #define ASYNC_FLAGS 0x7FFF /* Possible legal async flags */
130 #define ASYNC_USR_MASK 0x3430 /* Legal flags that non-privileged
131 * users can set or reset */
133 /* Internal flags used only by kernel/chr_drv/serial.c */
134 #define ASYNC_INITIALIZED 0x80000000 /* Serial port was initialized */
135 #define ASYNC_CALLOUT_ACTIVE 0x40000000 /* Call out device is active */
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;
179 /* Export to allow PCMCIA to use this - Dave Hinds */
180 extern int register_serial(struct serial_struct *req);
181 extern void unregister_serial(int line);
183 /* Allow architectures to override entries in serial8250_ports[] at run time: */
184 struct uart_port; /* forward declaration */
185 extern int early_serial_setup(struct uart_port *port);
187 #endif /* __KERNEL__ */
188 #endif /* _LINUX_SERIAL_H */