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 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)) - 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 #define SER_RS485_RTS_BEFORE_SEND (1 << 3) 214 __u32 delay_rts_before_send; /* Milliseconds */ 215 __u32 delay_rts_after_send; /* Milliseconds */ 216 __u32 padding[5]; /* Memory is cheap, new structs 217 are a royal PITA .. */ 218 }; 219 220 #ifdef __KERNEL__ 221 #include <linux/compiler.h> 222 223 #endif /* __KERNEL__ */ 224 #endif /* _LINUX_SERIAL_H */ 225