1 /* SPDX-License-Identifier: GPL-1.0+ WITH Linux-syscall-note */ 2 /* 3 * include/linux/serial.h 4 * 5 * Copyright (C) 1992 by Theodore Ts'o. 6 * 7 * Redistribution of this file is permitted under the terms of the GNU 8 * Public License (GPL) 9 */ 10 11 #ifndef _UAPI_LINUX_SERIAL_H 12 #define _UAPI_LINUX_SERIAL_H 13 14 #include <linux/const.h> 15 #include <linux/types.h> 16 17 #include <linux/tty_flags.h> 18 19 20 struct serial_struct { 21 int type; 22 int line; 23 unsigned int port; 24 int irq; 25 int flags; 26 int xmit_fifo_size; 27 int custom_divisor; 28 int baud_base; 29 unsigned short close_delay; 30 char io_type; 31 char reserved_char[1]; 32 int hub6; 33 unsigned short closing_wait; /* time to wait before closing */ 34 unsigned short closing_wait2; /* no longer used... */ 35 unsigned char *iomem_base; 36 unsigned short iomem_reg_shift; 37 unsigned int port_high; 38 unsigned long iomap_base; /* cookie passed into ioremap */ 39 }; 40 41 /* 42 * For the close wait times, 0 means wait forever for serial port to 43 * flush its output. 65535 means don't wait at all. 44 */ 45 #define ASYNC_CLOSING_WAIT_INF 0 46 #define ASYNC_CLOSING_WAIT_NONE 65535 47 48 /* 49 * These are the supported serial types. 50 */ 51 #define PORT_UNKNOWN 0 52 #define PORT_8250 1 53 #define PORT_16450 2 54 #define PORT_16550 3 55 #define PORT_16550A 4 56 #define PORT_CIRRUS 5 57 #define PORT_16650 6 58 #define PORT_16650V2 7 59 #define PORT_16750 8 60 #define PORT_STARTECH 9 61 #define PORT_16C950 10 /* Oxford Semiconductor */ 62 #define PORT_16654 11 63 #define PORT_16850 12 64 #define PORT_RSA 13 /* RSA-DV II/S card */ 65 #define PORT_MAX 13 66 67 #define SERIAL_IO_PORT 0 68 #define SERIAL_IO_HUB6 1 69 #define SERIAL_IO_MEM 2 70 #define SERIAL_IO_MEM32 3 71 #define SERIAL_IO_AU 4 72 #define SERIAL_IO_TSI 5 73 #define SERIAL_IO_MEM32BE 6 74 #define SERIAL_IO_MEM16 7 75 #define SERIAL_IO_BUS 8 76 77 #define UART_CLEAR_FIFO 0x01 78 #define UART_USE_FIFO 0x02 79 #define UART_STARTECH 0x04 80 #define UART_NATSEMI 0x08 81 82 83 /* 84 * Multiport serial configuration structure --- external structure 85 */ 86 struct serial_multiport_struct { 87 int irq; 88 int port1; 89 unsigned char mask1, match1; 90 int port2; 91 unsigned char mask2, match2; 92 int port3; 93 unsigned char mask3, match3; 94 int port4; 95 unsigned char mask4, match4; 96 int port_monitor; 97 int reserved[32]; 98 }; 99 100 /* 101 * Serial input interrupt line counters -- external structure 102 * Four lines can interrupt: CTS, DSR, RI, DCD 103 */ 104 struct serial_icounter_struct { 105 int cts, dsr, rng, dcd; 106 int rx, tx; 107 int frame, overrun, parity, brk; 108 int buf_overrun; 109 int reserved[9]; 110 }; 111 112 /** 113 * struct serial_rs485 - serial interface for controlling RS485 settings. 114 * @flags: RS485 feature flags. 115 * @delay_rts_before_send: Delay before send (milliseconds). 116 * @delay_rts_after_send: Delay after send (milliseconds). 117 * @addr_recv: Receive filter for RS485 addressing mode 118 * (used only when %SER_RS485_ADDR_RECV is set). 119 * @addr_dest: Destination address for RS485 addressing mode 120 * (used only when %SER_RS485_ADDR_DEST is set). 121 * @padding0: Padding (set to zero). 122 * @padding1: Padding (set to zero). 123 * @padding: Deprecated, use @padding0 and @padding1 instead. 124 * Do not use with @addr_recv and @addr_dest (due to 125 * overlap). 126 * 127 * Serial interface for controlling RS485 settings on chips with suitable 128 * support. Set with TIOCSRS485 and get with TIOCGRS485 if supported by your 129 * platform. The set function returns the new state, with any unsupported bits 130 * reverted appropriately. 131 * 132 * The flag bits are: 133 * 134 * * %SER_RS485_ENABLED - RS485 enabled. 135 * * %SER_RS485_RTS_ON_SEND - Logical level for RTS pin when sending. 136 * * %SER_RS485_RTS_AFTER_SEND - Logical level for RTS pin after sent. 137 * * %SER_RS485_RX_DURING_TX - Full-duplex RS485 line. 138 * * %SER_RS485_TERMINATE_BUS - Enable bus termination (if supported). 139 * * %SER_RS485_ADDRB - Enable RS485 addressing mode. 140 * * %SER_RS485_ADDR_RECV - Receive address filter (enables @addr_recv). Requires %SER_RS485_ADDRB. 141 * * %SER_RS485_ADDR_DEST - Destination address (enables @addr_dest). Requires %SER_RS485_ADDRB. 142 * * %SER_RS485_MODE_RS422 - Enable RS422. Requires %SER_RS485_ENABLED. 143 */ 144 struct serial_rs485 { 145 __u32 flags; 146 #define SER_RS485_ENABLED _BITUL(0) 147 #define SER_RS485_RTS_ON_SEND _BITUL(1) 148 #define SER_RS485_RTS_AFTER_SEND _BITUL(2) 149 /* Placeholder for bit 3: SER_RS485_RTS_BEFORE_SEND, which isn't used anymore */ 150 #define SER_RS485_RX_DURING_TX _BITUL(4) 151 #define SER_RS485_TERMINATE_BUS _BITUL(5) 152 #define SER_RS485_ADDRB _BITUL(6) 153 #define SER_RS485_ADDR_RECV _BITUL(7) 154 #define SER_RS485_ADDR_DEST _BITUL(8) 155 #define SER_RS485_MODE_RS422 _BITUL(9) 156 157 __u32 delay_rts_before_send; 158 __u32 delay_rts_after_send; 159 160 /* The fields below are defined by flags */ 161 union { 162 __u32 padding[5]; /* Memory is cheap, new structs are a pain */ 163 164 struct { 165 __u8 addr_recv; 166 __u8 addr_dest; 167 __u8 padding0[2]; 168 __u32 padding1[4]; 169 }; 170 }; 171 }; 172 173 /* 174 * Serial interface for controlling ISO7816 settings on chips with suitable 175 * support. Set with TIOCSISO7816 and get with TIOCGISO7816 if supported by 176 * your platform. 177 */ 178 struct serial_iso7816 { 179 __u32 flags; /* ISO7816 feature flags */ 180 #define SER_ISO7816_ENABLED (1 << 0) 181 #define SER_ISO7816_T_PARAM (0x0f << 4) 182 #define SER_ISO7816_T(t) (((t) & 0x0f) << 4) 183 __u32 tg; 184 __u32 sc_fi; 185 __u32 sc_di; 186 __u32 clk; 187 __u32 reserved[5]; 188 }; 189 190 #endif /* _UAPI_LINUX_SERIAL_H */ 191