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 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 ASYNC_HUP_NOTIFY 0x0001 /* Notify getty on hangups and closes 101 on the callout port */ 102 #define ASYNC_FOURPORT 0x0002 /* Set OU1, OUT2 per AST Fourport settings */ 103 #define ASYNC_SAK 0x0004 /* Secure Attention Key (Orange book) */ 104 #define ASYNC_SPLIT_TERMIOS 0x0008 /* Separate termios for dialin/callout */ 105 106 #define ASYNC_SPD_MASK 0x1030 107 #define ASYNC_SPD_HI 0x0010 /* Use 56000 instead of 38400 bps */ 108 109 #define ASYNC_SPD_VHI 0x0020 /* Use 115200 instead of 38400 bps */ 110 #define ASYNC_SPD_CUST 0x0030 /* Use user-specified divisor */ 111 112 #define ASYNC_SKIP_TEST 0x0040 /* Skip UART test during autoconfiguration */ 113 #define ASYNC_AUTO_IRQ 0x0080 /* Do automatic IRQ during autoconfiguration */ 114 #define ASYNC_SESSION_LOCKOUT 0x0100 /* Lock out cua opens based on session */ 115 #define ASYNC_PGRP_LOCKOUT 0x0200 /* Lock out cua opens based on pgrp */ 116 #define ASYNC_CALLOUT_NOHUP 0x0400 /* Don't do hangups for cua device */ 117 118 #define ASYNC_HARDPPS_CD 0x0800 /* Call hardpps when CD goes high */ 119 120 #define ASYNC_SPD_SHI 0x1000 /* Use 230400 instead of 38400 bps */ 121 #define ASYNC_SPD_WARP 0x1010 /* Use 460800 instead of 38400 bps */ 122 123 #define ASYNC_LOW_LATENCY 0x2000 /* Request low latency behaviour */ 124 125 #define ASYNC_BUGGY_UART 0x4000 /* This is a buggy UART, skip some safety 126 * checks. Note: can be dangerous! */ 127 128 #define ASYNC_AUTOPROBE 0x8000 /* Port was autoprobed by PCI or PNP code */ 129 130 #define ASYNC_FLAGS 0x7FFF /* Possible legal async flags */ 131 #define ASYNC_USR_MASK 0x3430 /* Legal flags that non-privileged 132 * users can set or reset */ 133 134 /* Internal flags used only by kernel/chr_drv/serial.c */ 135 #define ASYNC_INITIALIZED 0x80000000 /* Serial port was initialized */ 136 #define ASYNC_NORMAL_ACTIVE 0x20000000 /* Normal device is active */ 137 #define ASYNC_BOOT_AUTOCONF 0x10000000 /* Autoconfigure port on bootup */ 138 #define ASYNC_CLOSING 0x08000000 /* Serial port is closing */ 139 #define ASYNC_CTS_FLOW 0x04000000 /* Do CTS flow control */ 140 #define ASYNC_CHECK_CD 0x02000000 /* i.e., CLOCAL */ 141 #define ASYNC_SHARE_IRQ 0x01000000 /* for multifunction cards 142 --- no longer used */ 143 #define ASYNC_CONS_FLOW 0x00800000 /* flow control for console */ 144 145 #define ASYNC_BOOT_ONLYMCA 0x00400000 /* Probe only if MCA bus */ 146 #define ASYNC_INTERNAL_FLAGS 0xFFC00000 /* Internal flags */ 147 148 /* 149 * Multiport serial configuration structure --- external structure 150 */ 151 struct serial_multiport_struct { 152 int irq; 153 int port1; 154 unsigned char mask1, match1; 155 int port2; 156 unsigned char mask2, match2; 157 int port3; 158 unsigned char mask3, match3; 159 int port4; 160 unsigned char mask4, match4; 161 int port_monitor; 162 int reserved[32]; 163 }; 164 165 /* 166 * Serial input interrupt line counters -- external structure 167 * Four lines can interrupt: CTS, DSR, RI, DCD 168 */ 169 struct serial_icounter_struct { 170 int cts, dsr, rng, dcd; 171 int rx, tx; 172 int frame, overrun, parity, brk; 173 int buf_overrun; 174 int reserved[9]; 175 }; 176 177 /* 178 * Serial interface for controlling RS485 settings on chips with suitable 179 * support. Set with TIOCSRS485 and get with TIOCGRS485 if supported by your 180 * platform. The set function returns the new state, with any unsupported bits 181 * reverted appropriately. 182 */ 183 184 struct serial_rs485 { 185 __u32 flags; /* RS485 feature flags */ 186 #define SER_RS485_ENABLED (1 << 0) 187 #define SER_RS485_RTS_ON_SEND (1 << 1) 188 #define SER_RS485_RTS_AFTER_SEND (1 << 2) 189 __u32 delay_rts_before_send; /* Milliseconds */ 190 __u32 padding[6]; /* Memory is cheap, new structs 191 are a royal PITA .. */ 192 }; 193 194 #ifdef __KERNEL__ 195 #include <linux/compiler.h> 196 197 #endif /* __KERNEL__ */ 198 #endif /* _LINUX_SERIAL_H */ 199