Line data Source code
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 : #include <linux/types.h>
14 :
15 : #ifdef __KERNEL__
16 : #include <asm/page.h>
17 :
18 : /*
19 : * Counters of the input lines (CTS, DSR, RI, CD) interrupts
20 : */
21 :
22 : struct async_icount {
23 : __u32 cts, dsr, rng, dcd, tx, rx;
24 : __u32 frame, parity, overrun, brk;
25 : __u32 buf_overrun;
26 : };
27 1 :
28 : /*
29 : * The size of the serial xmit buffer is 1 page, or 4096 bytes
30 : */
31 : #define SERIAL_XMIT_SIZE PAGE_SIZE
32 :
33 : #endif
34 :
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 */
54 : };
55 :
56 : /*
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.
59 : */
60 : #define ASYNC_CLOSING_WAIT_INF 0
61 : #define ASYNC_CLOSING_WAIT_NONE 65535
62 :
63 : /*
64 : * These are the supported serial types.
65 : */
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
81 :
82 : #define SERIAL_IO_PORT 0
83 : #define SERIAL_IO_HUB6 1
84 : #define SERIAL_IO_MEM 2
85 :
86 : struct serial_uart_config {
87 : char *name;
88 : int dfl_xmit_fifo_size;
89 : int flags;
90 : };
91 :
92 : #define UART_CLEAR_FIFO 0x01
93 : #define UART_USE_FIFO 0x02
94 : #define UART_STARTECH 0x04
95 : #define UART_NATSEMI 0x08
96 :
97 : /*
98 : * Definitions for async_struct (and serial_struct) flags field
99 : *
100 : * Define ASYNCB_* for convenient use with {test,set,clear}_bit.
101 : */
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
122 :
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
135 :
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)
153 :
154 : #define ASYNC_FLAGS ((1U << ASYNCB_LAST_USER) - 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)
160 :
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))
171 :
172 : /*
173 : * Multiport serial configuration structure --- external structure
174 : */
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];
187 : };
188 :
189 : /*
190 : * Serial input interrupt line counters -- external structure
191 : * Four lines can interrupt: CTS, DSR, RI, DCD
192 : */
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];
199 : };
200 :
201 : /*
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.
206 : */
207 :
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 : __u32 delay_rts_before_send; /* Milliseconds */
214 : __u32 padding[6]; /* Memory is cheap, new structs
215 : are a royal PITA .. */
216 1 : };
217 :
218 : #ifdef __KERNEL__
219 : #include <linux/compiler.h>
220 :
221 : #endif /* __KERNEL__ */
222 : #endif /* _LINUX_SERIAL_H */
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