20060303

1 files changed, 104 insertions, 0 deletions

diff --git a/os/port/uart.h b/os/port/uart.h
new file mode 100644
index 00000000..370ee09a
--- /dev/null
+++ b/os/port/uart.h
@@ -0,0 +1,104 @@
+typedef struct PhysUart PhysUart;
+typedef struct Uart Uart;
+
+/*
+ *  routines to access UART hardware
+ */
+struct PhysUart
+{
+	char*	name;
+	Uart*	(*pnp)(void);
+	void	(*enable)(Uart*, int);
+	void	(*disable)(Uart*);
+	void	(*kick)(Uart*);
+	void	(*dobreak)(Uart*, int);
+	int	(*baud)(Uart*, int);
+	int	(*bits)(Uart*, int);
+	int	(*stop)(Uart*, int);
+	int	(*parity)(Uart*, int);
+	void	(*modemctl)(Uart*, int);
+	void	(*rts)(Uart*, int);
+	void	(*dtr)(Uart*, int);
+	long	(*status)(Uart*, void*, long, long);
+	void	(*fifo)(Uart*, int);
+	void	(*power)(Uart*, int);
+	int	(*getc)(Uart*);	/* polling versions, for iprint, rdb */
+	void	(*putc)(Uart*, int);
+};
+
+enum {
+	Stagesize=	1024
+};
+
+/*
+ *  software UART
+ */
+struct Uart
+{
+	void*	regs;			/* hardware stuff */
+	void*	saveregs;		/* place to put registers on power down */
+	char*	name;			/* internal name */
+	ulong	freq;			/* clock frequency */
+	int	bits;			/* bits per character */
+	int	stop;			/* stop bits */
+	int	parity;			/* even, odd or no parity */
+	int	baud;			/* baud rate */
+	PhysUart*phys;
+	int	console;		/* used as a serial console */
+	int	special;		/* internal kernel device */
+	Uart*	next;			/* list of allocated uarts */
+
+	QLock;
+	int	type;			/* ?? */
+	int	dev;
+	int	opens;
+
+	int	enabled;
+	Uart	*elist;			/* next enabled interface */
+
+	int	perr;			/* parity errors */
+	int	ferr;			/* framing errors */
+	int	oerr;			/* rcvr overruns */
+	int	berr;			/* no input buffers */
+	int	serr;			/* input queue overflow */
+
+	/* buffers */
+	int	(*putc)(Queue*, int);
+	Queue	*iq;
+	Queue	*oq;
+
+	Lock	rlock;
+	uchar	istage[Stagesize];
+	uchar	*iw;
+	uchar	*ir;
+	uchar	*ie;
+
+	Lock	tlock;			/* transmit */
+	uchar	ostage[Stagesize];
+	uchar	*op;
+	uchar	*oe;
+	int	drain;
+
+	int	modem;			/* hardware flow control on */
+	int	xonoff;			/* software flow control on */
+	int	blocked;
+	int	cts, dsr, dcd, dcdts;	/* keep track of modem status */ 
+	int	ctsbackoff;
+	int	hup_dsr, hup_dcd;	/* send hangup upstream? */
+	int	dohup;
+
+	Rendez	r;
+};
+
+extern Uart*	consuart;
+
+extern int	uartctl(Uart*, char*);
+extern int	uartgetc(void);
+extern void	uartkick(void*);
+extern void	uartmouse(Uart*, int (*)(Queue*, int), int);
+extern void	uartsetmouseputc(Uart*, int (*)(Queue*, int));
+extern void	uartputc(int);
+extern void	uartputs(char*, int);
+extern void	uartrecv(Uart*, char);
+extern Uart*	uartsetup(Uart*);
+extern int		uartstageoutput(Uart*);