Import of Linus's Linux 1.1.68

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 */