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Diffstat (limited to 'include/linux/serial.h')
| -rw-r--r-- | include/linux/serial.h | 139 |
1 files changed, 139 insertions, 0 deletions
diff --git a/include/linux/serial.h b/include/linux/serial.h new file mode 100644 index 000000000..1877f42b2 --- /dev/null +++ b/include/linux/serial.h @@ -0,0 +1,139 @@ +/* + * include/linux/serial.h + * + * Copyright (C) 1992 by Theodore Ts'o. + * + * Redistribution of this file is permitted under the terms of the GNU + * Public License (GPL) + */ + +#ifndef _LINUX_SERIAL_H +#define _LINUX_SERIAL_H + +struct serial_struct { + int type; + int line; + int port; + int irq; + int flags; + int xmit_fifo_size; + int custom_divisor; + int baud_base; + unsigned short close_delay; + char reserved_char[2]; + int hub6; + int reserved[5]; +}; + +/* + * These are the supported serial types. + */ +#define PORT_UNKNOWN 0 +#define PORT_8250 1 +#define PORT_16450 2 +#define PORT_16550 3 +#define PORT_16550A 4 +#define PORT_MAX 4 + +/* + * Definitions for async_struct (and serial_struct) flags field + */ +#define ASYNC_HUP_NOTIFY 0x0001 /* Notify getty on hangups and closes + on the callout port */ +#define ASYNC_FOURPORT 0x0002 /* Set OU1, OUT2 per AST Fourport settings */ +#define ASYNC_SAK 0x0004 /* Secure Attention Key (Orange book) */ +#define ASYNC_SPLIT_TERMIOS 0x0008 /* Separate termios for dialin/callout */ + +#define ASYNC_SPD_MASK 0x0030 +#define ASYNC_SPD_HI 0x0010 /* Use 56000 instead of 38400 bps */ + +#define ASYNC_SPD_VHI 0x0020 /* Use 115200 instead of 38400 bps */ +#define ASYNC_SPD_CUST 0x0030 /* Use user-specified divisor */ + +#define ASYNC_SKIP_TEST 0x0040 /* Skip UART test during autoconfiguration */ +#define ASYNC_AUTO_IRQ 0x0080 /* Do automatic IRQ during autoconfiguration */ +#define ASYNC_SESSION_LOCKOUT 0x0100 /* Lock out cua opens based on session */ +#define ASYNC_PGRP_LOCKOUT 0x0200 /* Lock out cua opens based on pgrp */ +#define ASYNC_CALLOUT_NOHUP 0x0400 /* Don't do hangups for cua device */ + +#define ASYNC_FLAGS 0x0FFF /* Possible legal async flags */ +#define ASYNC_USR_MASK 0x0430 /* Legal flags that non-privileged + * users can set or reset */ + +/* Internal flags used only by kernel/chr_drv/serial.c */ +#define ASYNC_INITIALIZED 0x80000000 /* Serial port was initialized */ +#define ASYNC_CALLOUT_ACTIVE 0x40000000 /* Call out device is active */ +#define ASYNC_NORMAL_ACTIVE 0x20000000 /* Normal device is active */ +#define ASYNC_BOOT_AUTOCONF 0x10000000 /* Autoconfigure port on bootup */ +#define ASYNC_CLOSING 0x08000000 /* Serial port is closing */ +#define ASYNC_CTS_FLOW 0x04000000 /* Do CTS flow control */ +#define ASYNC_CHECK_CD 0x02000000 /* i.e., CLOCAL */ + +#ifdef __KERNEL__ +/* + * This is our internal structure for each serial port's state. + * + * Many fields are paralleled by the structure used by the serial_struct + * structure. + * + * For definitions of the flags field, see tty.h + */ + +struct async_struct { + int magic; + int baud_base; + int port; + int irq; + int flags; /* defined in tty.h */ + int hub6; /* HUB6 plus one */ + int type; /* UART type */ + struct tty_struct *tty; + int read_status_mask; + int ignore_status_mask; + int timeout; + int xmit_fifo_size; + int custom_divisor; + int x_char; /* xon/xoff character */ + int close_delay; + int IER; /* Interrupt Enable Register */ + int MCR; /* Modem control register */ + int MCR_noint; /* MCR with interrupts off */ + int event; + unsigned long last_active; + int line; + int count; /* # of fd on device */ + int blocked_open; /* # of blocked opens */ + long session; /* Session of opening process */ + long pgrp; /* pgrp of opening process */ + unsigned char *xmit_buf; + int xmit_head; + int xmit_tail; + int xmit_cnt; + struct tq_struct tqueue; + struct termios normal_termios; + struct termios callout_termios; + struct wait_queue *open_wait; + struct wait_queue *close_wait; + struct async_struct *next_port; /* For the linked list */ + struct async_struct *prev_port; +}; + +#define SERIAL_MAGIC 0x5301 + +/* + * The size of the serial xmit buffer is 1 page, or 4096 bytes + */ +#define SERIAL_XMIT_SIZE 4096 + +/* + * Events are used to schedule things to happen at timer-interrupt + * time, instead of at rs interrupt time. + */ +#define RS_EVENT_WRITE_WAKEUP 0 +#define RS_EVENT_HANGUP 1 + +/* Export to allow PCMCIA to use this - Dave Hinds */ +extern int register_serial(struct serial_struct *req); +extern void unregister_serial(int line); +#endif /* __KERNEL__ */ +#endif /* _LINUX_SERIAL_H */ |