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[zen-stable.git] / include / linux / serial.h
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1 /*
2 * include/linux/serial.h
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 */
10 #ifndef _LINUX_SERIAL_H
11 #define _LINUX_SERIAL_H
13 #include <linux/types.h>
15 #ifdef __KERNEL__
16 #include <asm/page.h>
19 * Counters of the input lines (CTS, DSR, RI, CD) interrupts
22 struct async_icount {
23 __u32 cts, dsr, rng, dcd, tx, rx;
24 __u32 frame, parity, overrun, brk;
25 __u32 buf_overrun;
29 * The size of the serial xmit buffer is 1 page, or 4096 bytes
31 #define SERIAL_XMIT_SIZE PAGE_SIZE
33 #endif
35 struct serial_struct {
36 int type;
37 int line;
38 unsigned int port;
39 int irq;
40 int flags;
41 int xmit_fifo_size;
42 int custom_divisor;
43 int baud_base;
44 unsigned short close_delay;
45 char io_type;
46 char reserved_char[1];
47 int hub6;
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
67 #define PORT_8250 1
68 #define PORT_16450 2
69 #define PORT_16550 3
70 #define PORT_16550A 4
71 #define PORT_CIRRUS 5 /* usurped by cyclades.c */
72 #define PORT_16650 6
73 #define PORT_16650V2 7
74 #define PORT_16750 8
75 #define PORT_STARTECH 9 /* usurped by cyclades.c */
76 #define PORT_16C950 10 /* Oxford Semiconductor */
77 #define PORT_16654 11
78 #define PORT_16850 12
79 #define PORT_RSA 13 /* RSA-DV II/S card */
80 #define PORT_MAX 13
82 #define SERIAL_IO_PORT 0
83 #define SERIAL_IO_HUB6 1
84 #define SERIAL_IO_MEM 2
86 struct serial_uart_config {
87 char *name;
88 int dfl_xmit_fifo_size;
89 int flags;
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 ASYNCB_* for convenient use with {test,set,clear}_bit.
102 #define ASYNCB_HUP_NOTIFY 0 /* Notify getty on hangups and closes
103 * on the callout port */
104 #define ASYNCB_FOURPORT 1 /* Set OU1, OUT2 per AST Fourport settings */
105 #define ASYNCB_SAK 2 /* Secure Attention Key (Orange book) */
106 #define ASYNCB_SPLIT_TERMIOS 3 /* Separate termios for dialin/callout */
107 #define ASYNCB_SPD_HI 4 /* Use 56000 instead of 38400 bps */
108 #define ASYNCB_SPD_VHI 5 /* Use 115200 instead of 38400 bps */
109 #define ASYNCB_SKIP_TEST 6 /* Skip UART test during autoconfiguration */
110 #define ASYNCB_AUTO_IRQ 7 /* Do automatic IRQ during
111 * autoconfiguration */
112 #define ASYNCB_SESSION_LOCKOUT 8 /* Lock out cua opens based on session */
113 #define ASYNCB_PGRP_LOCKOUT 9 /* Lock out cua opens based on pgrp */
114 #define ASYNCB_CALLOUT_NOHUP 10 /* Don't do hangups for cua device */
115 #define ASYNCB_HARDPPS_CD 11 /* Call hardpps when CD goes high */
116 #define ASYNCB_SPD_SHI 12 /* Use 230400 instead of 38400 bps */
117 #define ASYNCB_LOW_LATENCY 13 /* Request low latency behaviour */
118 #define ASYNCB_BUGGY_UART 14 /* This is a buggy UART, skip some safety
119 * checks. Note: can be dangerous! */
120 #define ASYNCB_AUTOPROBE 15 /* Port was autoprobed by PCI or PNP code */
121 #define ASYNCB_LAST_USER 15
123 /* Internal flags used only by kernel */
124 #define ASYNCB_INITIALIZED 31 /* Serial port was initialized */
125 #define ASYNCB_SUSPENDED 30 /* Serial port is suspended */
126 #define ASYNCB_NORMAL_ACTIVE 29 /* Normal device is active */
127 #define ASYNCB_BOOT_AUTOCONF 28 /* Autoconfigure port on bootup */
128 #define ASYNCB_CLOSING 27 /* Serial port is closing */
129 #define ASYNCB_CTS_FLOW 26 /* Do CTS flow control */
130 #define ASYNCB_CHECK_CD 25 /* i.e., CLOCAL */
131 #define ASYNCB_SHARE_IRQ 24 /* for multifunction cards, no longer used */
132 #define ASYNCB_CONS_FLOW 23 /* flow control for console */
133 #define ASYNCB_BOOT_ONLYMCA 22 /* Probe only if MCA bus */
134 #define ASYNCB_FIRST_KERNEL 22
136 #define ASYNC_HUP_NOTIFY (1U << ASYNCB_HUP_NOTIFY)
137 #define ASYNC_SUSPENDED (1U << ASYNCB_SUSPENDED)
138 #define ASYNC_FOURPORT (1U << ASYNCB_FOURPORT)
139 #define ASYNC_SAK (1U << ASYNCB_SAK)
140 #define ASYNC_SPLIT_TERMIOS (1U << ASYNCB_SPLIT_TERMIOS)
141 #define ASYNC_SPD_HI (1U << ASYNCB_SPD_HI)
142 #define ASYNC_SPD_VHI (1U << ASYNCB_SPD_VHI)
143 #define ASYNC_SKIP_TEST (1U << ASYNCB_SKIP_TEST)
144 #define ASYNC_AUTO_IRQ (1U << ASYNCB_AUTO_IRQ)
145 #define ASYNC_SESSION_LOCKOUT (1U << ASYNCB_SESSION_LOCKOUT)
146 #define ASYNC_PGRP_LOCKOUT (1U << ASYNCB_PGRP_LOCKOUT)
147 #define ASYNC_CALLOUT_NOHUP (1U << ASYNCB_CALLOUT_NOHUP)
148 #define ASYNC_HARDPPS_CD (1U << ASYNCB_HARDPPS_CD)
149 #define ASYNC_SPD_SHI (1U << ASYNCB_SPD_SHI)
150 #define ASYNC_LOW_LATENCY (1U << ASYNCB_LOW_LATENCY)
151 #define ASYNC_BUGGY_UART (1U << ASYNCB_BUGGY_UART)
152 #define ASYNC_AUTOPROBE (1U << ASYNCB_AUTOPROBE)
154 #define ASYNC_FLAGS ((1U << (ASYNCB_LAST_USER + 1)) - 1)
155 #define ASYNC_USR_MASK (ASYNC_SPD_HI|ASYNC_SPD_VHI| \
156 ASYNC_CALLOUT_NOHUP|ASYNC_SPD_SHI|ASYNC_LOW_LATENCY)
157 #define ASYNC_SPD_CUST (ASYNC_SPD_HI|ASYNC_SPD_VHI)
158 #define ASYNC_SPD_WARP (ASYNC_SPD_HI|ASYNC_SPD_SHI)
159 #define ASYNC_SPD_MASK (ASYNC_SPD_HI|ASYNC_SPD_VHI|ASYNC_SPD_SHI)
161 #define ASYNC_INITIALIZED (1U << ASYNCB_INITIALIZED)
162 #define ASYNC_NORMAL_ACTIVE (1U << ASYNCB_NORMAL_ACTIVE)
163 #define ASYNC_BOOT_AUTOCONF (1U << ASYNCB_BOOT_AUTOCONF)
164 #define ASYNC_CLOSING (1U << ASYNCB_CLOSING)
165 #define ASYNC_CTS_FLOW (1U << ASYNCB_CTS_FLOW)
166 #define ASYNC_CHECK_CD (1U << ASYNCB_CHECK_CD)
167 #define ASYNC_SHARE_IRQ (1U << ASYNCB_SHARE_IRQ)
168 #define ASYNC_CONS_FLOW (1U << ASYNCB_CONS_FLOW)
169 #define ASYNC_BOOT_ONLYMCA (1U << ASYNCB_BOOT_ONLYMCA)
170 #define ASYNC_INTERNAL_FLAGS (~((1U << ASYNCB_FIRST_KERNEL) - 1))
173 * Multiport serial configuration structure --- external structure
175 struct serial_multiport_struct {
176 int irq;
177 int port1;
178 unsigned char mask1, match1;
179 int port2;
180 unsigned char mask2, match2;
181 int port3;
182 unsigned char mask3, match3;
183 int port4;
184 unsigned char mask4, match4;
185 int port_monitor;
186 int reserved[32];
190 * Serial input interrupt line counters -- external structure
191 * Four lines can interrupt: CTS, DSR, RI, DCD
193 struct serial_icounter_struct {
194 int cts, dsr, rng, dcd;
195 int rx, tx;
196 int frame, overrun, parity, brk;
197 int buf_overrun;
198 int reserved[9];
202 * Serial interface for controlling RS485 settings on chips with suitable
203 * support. Set with TIOCSRS485 and get with TIOCGRS485 if supported by your
204 * platform. The set function returns the new state, with any unsupported bits
205 * reverted appropriately.
208 struct serial_rs485 {
209 __u32 flags; /* RS485 feature flags */
210 #define SER_RS485_ENABLED (1 << 0)
211 #define SER_RS485_RTS_ON_SEND (1 << 1)
212 #define SER_RS485_RTS_AFTER_SEND (1 << 2)
213 #define SER_RS485_RTS_BEFORE_SEND (1 << 3)
214 #define SER_RS485_RX_DURING_TX (1 << 4)
215 __u32 delay_rts_before_send; /* Milliseconds */
216 __u32 delay_rts_after_send; /* Milliseconds */
217 __u32 padding[5]; /* Memory is cheap, new structs
218 are a royal PITA .. */
221 #ifdef __KERNEL__
222 #include <linux/compiler.h>
224 #endif /* __KERNEL__ */
225 #endif /* _LINUX_SERIAL_H */