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 <linux/types.h> 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__ 178 #include <linux/compiler.h> 179 180 #endif /* __KERNEL__ */ 181 #endif /* _LINUX_SERIAL_H */ 182