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 84 struct serial_uart_config { 85 char *name; 86 int dfl_xmit_fifo_size; 87 int flags; 88 }; 89 90 #define UART_CLEAR_FIFO 0x01 91 #define UART_USE_FIFO 0x02 92 #define UART_STARTECH 0x04 93 94 /* 95 * Definitions for async_struct (and serial_struct) flags field 96 */ 97 #define ASYNC_HUP_NOTIFY 0x0001 /* Notify getty on hangups and closes 98 on the callout port */ 99 #define ASYNC_FOURPORT 0x0002 /* Set OU1, OUT2 per AST Fourport settings */ 100 #define ASYNC_SAK 0x0004 /* Secure Attention Key (Orange book) */ 101 #define ASYNC_SPLIT_TERMIOS 0x0008 /* Separate termios for dialin/callout */ 102 103 #define ASYNC_SPD_MASK 0x1030 104 #define ASYNC_SPD_HI 0x0010 /* Use 56000 instead of 38400 bps */ 105 106 #define ASYNC_SPD_VHI 0x0020 /* Use 115200 instead of 38400 bps */ 107 #define ASYNC_SPD_CUST 0x0030 /* Use user-specified divisor */ 108 109 #define ASYNC_SKIP_TEST 0x0040 /* Skip UART test during autoconfiguration */ 110 #define ASYNC_AUTO_IRQ 0x0080 /* Do automatic IRQ during autoconfiguration */ 111 #define ASYNC_SESSION_LOCKOUT 0x0100 /* Lock out cua opens based on session */ 112 #define ASYNC_PGRP_LOCKOUT 0x0200 /* Lock out cua opens based on pgrp */ 113 #define ASYNC_CALLOUT_NOHUP 0x0400 /* Don't do hangups for cua device */ 114 115 #define ASYNC_HARDPPS_CD 0x0800 /* Call hardpps when CD goes high */ 116 117 #define ASYNC_SPD_SHI 0x1000 /* Use 230400 instead of 38400 bps */ 118 #define ASYNC_SPD_WARP 0x1010 /* Use 460800 instead of 38400 bps */ 119 120 #define ASYNC_LOW_LATENCY 0x2000 /* Request low latency behaviour */ 121 122 #define ASYNC_BUGGY_UART 0x4000 /* This is a buggy UART, skip some safety 123 * checks. Note: can be dangerous! */ 124 125 #define ASYNC_AUTOPROBE 0x8000 /* Port was autoprobed by PCI or PNP code */ 126 127 #define ASYNC_FLAGS 0x7FFF /* Possible legal async flags */ 128 #define ASYNC_USR_MASK 0x3430 /* Legal flags that non-privileged 129 * users can set or reset */ 130 131 /* Internal flags used only by kernel/chr_drv/serial.c */ 132 #define ASYNC_INITIALIZED 0x80000000 /* Serial port was initialized */ 133 #define ASYNC_CALLOUT_ACTIVE 0x40000000 /* Call out device is active */ 134 #define ASYNC_NORMAL_ACTIVE 0x20000000 /* Normal device is active */ 135 #define ASYNC_BOOT_AUTOCONF 0x10000000 /* Autoconfigure port on bootup */ 136 #define ASYNC_CLOSING 0x08000000 /* Serial port is closing */ 137 #define ASYNC_CTS_FLOW 0x04000000 /* Do CTS flow control */ 138 #define ASYNC_CHECK_CD 0x02000000 /* i.e., CLOCAL */ 139 #define ASYNC_SHARE_IRQ 0x01000000 /* for multifunction cards 140 --- no longer used */ 141 #define ASYNC_CONS_FLOW 0x00800000 /* flow control for console */ 142 143 #define ASYNC_BOOT_ONLYMCA 0x00400000 /* Probe only if MCA bus */ 144 #define ASYNC_INTERNAL_FLAGS 0xFFC00000 /* Internal flags */ 145 146 /* 147 * Multiport serial configuration structure --- external structure 148 */ 149 struct serial_multiport_struct { 150 int irq; 151 int port1; 152 unsigned char mask1, match1; 153 int port2; 154 unsigned char mask2, match2; 155 int port3; 156 unsigned char mask3, match3; 157 int port4; 158 unsigned char mask4, match4; 159 int port_monitor; 160 int reserved[32]; 161 }; 162 163 /* 164 * Serial input interrupt line counters -- external structure 165 * Four lines can interrupt: CTS, DSR, RI, DCD 166 */ 167 struct serial_icounter_struct { 168 int cts, dsr, rng, dcd; 169 int rx, tx; 170 int frame, overrun, parity, brk; 171 int buf_overrun; 172 int reserved[9]; 173 }; 174 175 176 #ifdef __KERNEL__ 177 /* Export to allow PCMCIA to use this - Dave Hinds */ 178 extern int register_serial(struct serial_struct *req); 179 extern void unregister_serial(int line); 180 181 /* Allow complicated architectures to specify rs_table[] at run time */ 182 extern int early_serial_setup(struct serial_struct *req); 183 184 /* tty port reserved for the HCDP serial console port */ 185 #define HCDP_SERIAL_CONSOLE_PORT 4 186 187 #endif /* __KERNEL__ */ 188 #endif /* _LINUX_SERIAL_H */ 189