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 _UAPI_LINUX_SERIAL_H 11 #define _UAPI_LINUX_SERIAL_H 12 13 #include <linux/types.h> 14 15 #include <linux/tty_flags.h> 16 17 18 struct serial_struct { 19 int type; 20 int line; 21 unsigned int port; 22 int irq; 23 int flags; 24 int xmit_fifo_size; 25 int custom_divisor; 26 int baud_base; 27 unsigned short close_delay; 28 char io_type; 29 char reserved_char[1]; 30 int hub6; 31 unsigned short closing_wait; /* time to wait before closing */ 32 unsigned short closing_wait2; /* no longer used... */ 33 unsigned char *iomem_base; 34 unsigned short iomem_reg_shift; 35 unsigned int port_high; 36 unsigned long iomap_base; /* cookie passed into ioremap */ 37 }; 38 39 /* 40 * For the close wait times, 0 means wait forever for serial port to 41 * flush its output. 65535 means don't wait at all. 42 */ 43 #define ASYNC_CLOSING_WAIT_INF 0 44 #define ASYNC_CLOSING_WAIT_NONE 65535 45 46 /* 47 * These are the supported serial types. 48 */ 49 #define PORT_UNKNOWN 0 50 #define PORT_8250 1 51 #define PORT_16450 2 52 #define PORT_16550 3 53 #define PORT_16550A 4 54 #define PORT_CIRRUS 5 /* usurped by cyclades.c */ 55 #define PORT_16650 6 56 #define PORT_16650V2 7 57 #define PORT_16750 8 58 #define PORT_STARTECH 9 /* usurped by cyclades.c */ 59 #define PORT_16C950 10 /* Oxford Semiconductor */ 60 #define PORT_16654 11 61 #define PORT_16850 12 62 #define PORT_RSA 13 /* RSA-DV II/S card */ 63 #define PORT_MAX 13 64 65 #define SERIAL_IO_PORT 0 66 #define SERIAL_IO_HUB6 1 67 #define SERIAL_IO_MEM 2 68 69 #define UART_CLEAR_FIFO 0x01 70 #define UART_USE_FIFO 0x02 71 #define UART_STARTECH 0x04 72 #define UART_NATSEMI 0x08 73 74 75 /* 76 * Multiport serial configuration structure --- external structure 77 */ 78 struct serial_multiport_struct { 79 int irq; 80 int port1; 81 unsigned char mask1, match1; 82 int port2; 83 unsigned char mask2, match2; 84 int port3; 85 unsigned char mask3, match3; 86 int port4; 87 unsigned char mask4, match4; 88 int port_monitor; 89 int reserved[32]; 90 }; 91 92 /* 93 * Serial input interrupt line counters -- external structure 94 * Four lines can interrupt: CTS, DSR, RI, DCD 95 */ 96 struct serial_icounter_struct { 97 int cts, dsr, rng, dcd; 98 int rx, tx; 99 int frame, overrun, parity, brk; 100 int buf_overrun; 101 int reserved[9]; 102 }; 103 104 /* 105 * Serial interface for controlling RS485 settings on chips with suitable 106 * support. Set with TIOCSRS485 and get with TIOCGRS485 if supported by your 107 * platform. The set function returns the new state, with any unsupported bits 108 * reverted appropriately. 109 */ 110 111 struct serial_rs485 { 112 __u32 flags; /* RS485 feature flags */ 113 #define SER_RS485_ENABLED (1 << 0) /* If enabled */ 114 #define SER_RS485_RTS_ON_SEND (1 << 1) /* Logical level for 115 RTS pin when 116 sending */ 117 #define SER_RS485_RTS_AFTER_SEND (1 << 2) /* Logical level for 118 RTS pin after sent*/ 119 #define SER_RS485_RX_DURING_TX (1 << 4) 120 __u32 delay_rts_before_send; /* Delay before send (milliseconds) */ 121 __u32 delay_rts_after_send; /* Delay after send (milliseconds) */ 122 __u32 padding[5]; /* Memory is cheap, new structs 123 are a royal PITA .. */ 124 }; 125 126 #endif /* _UAPI_LINUX_SERIAL_H */ 127