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1da177e4 LT |
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__ | |
4e57b681 | 14 | #include <linux/types.h> |
1da177e4 LT |
15 | #include <asm/page.h> |
16 | ||
17 | /* | |
18 | * Counters of the input lines (CTS, DSR, RI, CD) interrupts | |
19 | */ | |
20 | ||
21 | struct async_icount { | |
22 | __u32 cts, dsr, rng, dcd, tx, rx; | |
23 | __u32 frame, parity, overrun, brk; | |
24 | __u32 buf_overrun; | |
25 | }; | |
26 | ||
27 | /* | |
28 | * The size of the serial xmit buffer is 1 page, or 4096 bytes | |
29 | */ | |
30 | #define SERIAL_XMIT_SIZE PAGE_SIZE | |
31 | ||
32 | #endif | |
33 | ||
34 | struct serial_struct { | |
35 | int type; | |
36 | int line; | |
37 | unsigned int port; | |
38 | int irq; | |
39 | int flags; | |
40 | int xmit_fifo_size; | |
41 | int custom_divisor; | |
42 | int baud_base; | |
43 | unsigned short close_delay; | |
44 | char io_type; | |
45 | char reserved_char[1]; | |
46 | int hub6; | |
47 | unsigned short closing_wait; /* time to wait before closing */ | |
48 | unsigned short closing_wait2; /* no longer used... */ | |
49 | unsigned char *iomem_base; | |
50 | unsigned short iomem_reg_shift; | |
51 | unsigned int port_high; | |
52 | unsigned long iomap_base; /* cookie passed into ioremap */ | |
53 | }; | |
54 | ||
55 | /* | |
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. | |
58 | */ | |
59 | #define ASYNC_CLOSING_WAIT_INF 0 | |
60 | #define ASYNC_CLOSING_WAIT_NONE 65535 | |
61 | ||
62 | /* | |
63 | * These are the supported serial types. | |
64 | */ | |
65 | #define PORT_UNKNOWN 0 | |
66 | #define PORT_8250 1 | |
67 | #define PORT_16450 2 | |
68 | #define PORT_16550 3 | |
69 | #define PORT_16550A 4 | |
70 | #define PORT_CIRRUS 5 /* usurped by cyclades.c */ | |
71 | #define PORT_16650 6 | |
72 | #define PORT_16650V2 7 | |
73 | #define PORT_16750 8 | |
74 | #define PORT_STARTECH 9 /* usurped by cyclades.c */ | |
75 | #define PORT_16C950 10 /* Oxford Semiconductor */ | |
76 | #define PORT_16654 11 | |
77 | #define PORT_16850 12 | |
78 | #define PORT_RSA 13 /* RSA-DV II/S card */ | |
79 | #define PORT_MAX 13 | |
80 | ||
81 | #define SERIAL_IO_PORT 0 | |
82 | #define SERIAL_IO_HUB6 1 | |
83 | #define SERIAL_IO_MEM 2 | |
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 | #define UART_NATSEMI 0x08 | |
95 | ||
96 | /* | |
97 | * Definitions for async_struct (and serial_struct) flags field | |
98 | */ | |
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 */ | |
104 | ||
105 | #define ASYNC_SPD_MASK 0x1030 | |
106 | #define ASYNC_SPD_HI 0x0010 /* Use 56000 instead of 38400 bps */ | |
107 | ||
108 | #define ASYNC_SPD_VHI 0x0020 /* Use 115200 instead of 38400 bps */ | |
109 | #define ASYNC_SPD_CUST 0x0030 /* Use user-specified divisor */ | |
110 | ||
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 */ | |
116 | ||
117 | #define ASYNC_HARDPPS_CD 0x0800 /* Call hardpps when CD goes high */ | |
118 | ||
119 | #define ASYNC_SPD_SHI 0x1000 /* Use 230400 instead of 38400 bps */ | |
120 | #define ASYNC_SPD_WARP 0x1010 /* Use 460800 instead of 38400 bps */ | |
121 | ||
122 | #define ASYNC_LOW_LATENCY 0x2000 /* Request low latency behaviour */ | |
123 | ||
124 | #define ASYNC_BUGGY_UART 0x4000 /* This is a buggy UART, skip some safety | |
125 | * checks. Note: can be dangerous! */ | |
126 | ||
127 | #define ASYNC_AUTOPROBE 0x8000 /* Port was autoprobed by PCI or PNP code */ | |
128 | ||
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 */ | |
132 | ||
133 | /* Internal flags used only by kernel/chr_drv/serial.c */ | |
134 | #define ASYNC_INITIALIZED 0x80000000 /* Serial port was initialized */ | |
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 | #define ASYNC_CONS_FLOW 0x00800000 /* flow control for console */ | |
143 | ||
144 | #define ASYNC_BOOT_ONLYMCA 0x00400000 /* Probe only if MCA bus */ | |
145 | #define ASYNC_INTERNAL_FLAGS 0xFFC00000 /* Internal flags */ | |
146 | ||
147 | /* | |
148 | * Multiport serial configuration structure --- external structure | |
149 | */ | |
150 | struct serial_multiport_struct { | |
151 | int irq; | |
152 | int port1; | |
153 | unsigned char mask1, match1; | |
154 | int port2; | |
155 | unsigned char mask2, match2; | |
156 | int port3; | |
157 | unsigned char mask3, match3; | |
158 | int port4; | |
159 | unsigned char mask4, match4; | |
160 | int port_monitor; | |
161 | int reserved[32]; | |
162 | }; | |
163 | ||
164 | /* | |
165 | * Serial input interrupt line counters -- external structure | |
166 | * Four lines can interrupt: CTS, DSR, RI, DCD | |
167 | */ | |
168 | struct serial_icounter_struct { | |
169 | int cts, dsr, rng, dcd; | |
170 | int rx, tx; | |
171 | int frame, overrun, parity, brk; | |
172 | int buf_overrun; | |
173 | int reserved[9]; | |
174 | }; | |
175 | ||
176 | ||
177 | #ifdef __KERNEL__ | |
661f83a6 RK |
178 | #include <linux/compiler.h> |
179 | ||
1da177e4 LT |
180 | /* Allow architectures to override entries in serial8250_ports[] at run time: */ |
181 | struct uart_port; /* forward declaration */ | |
182 | extern int early_serial_setup(struct uart_port *port); | |
183 | extern int early_serial_console_init(char *options); | |
184 | extern int serial8250_start_console(struct uart_port *port, char *options); | |
185 | ||
186 | #endif /* __KERNEL__ */ | |
187 | #endif /* _LINUX_SERIAL_H */ |