Initial source

1 files changed, 694 insertions, 0 deletions

diff --git a/chips/serial_console.c b/chips/serial_console.c
new file mode 100644
index 0000000..7b15dd4
--- /dev/null
+++ b/chips/serial_console.c
@@ -0,0 +1,694 @@
+/* 
+ * Mach Operating System
+ * Copyright (c) 1991,1990,1989 Carnegie Mellon University
+ * All Rights Reserved.
+ * 
+ * Permission to use, copy, modify and distribute this software and its
+ * documentation is hereby granted, provided that both the copyright
+ * notice and this permission notice appear in all copies of the
+ * software, derivative works or modified versions, and any portions
+ * thereof, and that both notices appear in supporting documentation.
+ * 
+ * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
+ * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
+ * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
+ * 
+ * Carnegie Mellon requests users of this software to return to
+ * 
+ *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
+ *  School of Computer Science
+ *  Carnegie Mellon University
+ *  Pittsburgh PA 15213-3890
+ * 
+ * any improvements or extensions that they make and grant Carnegie Mellon
+ * the rights to redistribute these changes.
+ */
+/*
+ *	File: serial_console.c
+ * 	Author: Alessandro Forin, Carnegie Mellon University
+ *	Date:	7/91
+ *
+ *	Console driver for serial-line based consoles.
+ */
+
+#include <constty.h>
+#if	NCONSTTY > 0
+#include <bm.h>
+#include <platforms.h>
+
+#include <mach_kdb.h>
+
+#include <machine/machspl.h>		/* spl definitions */
+#include <device/io_req.h>
+#include <device/tty.h>
+#include <sys/syslog.h>
+
+#include <chips/busses.h>
+#include <chips/screen_defs.h>
+#include <chips/serial_defs.h>
+
+#ifdef	DECSTATION
+#include <mips/prom_interface.h>
+#define	find_rconsole(p)	dec_check_rcline(p)
+#define	CONSOLE_SERIAL_LINE_NO	3
+#endif	/*DECSTATION*/
+
+#ifdef	VAXSTATION
+#define	find_rconsole(p)
+#define cnputc ser_putc
+#define cngetc ser_getc
+#define cnpollc ser_pollc
+#define cnmaygetc ser_maygetc
+#define	CONSOLE_SERIAL_LINE_NO	3
+#endif	/*VAXSTATION*/
+
+#ifdef	FLAMINGO
+#define	CONSOLE_SERIAL_LINE_NO	3
+#endif
+
+#ifndef	CONSOLE_SERIAL_LINE_NO
+#define	CONSOLE_SERIAL_LINE_NO	0
+#endif
+
+/* Size this as max possible number of lines in any serial chip we might use */
+static struct tty 	console_tty_data[NCONSTTY];
+struct tty		*console_tty[NCONSTTY];	/* exported */
+
+#define	DEFAULT_SPEED	B9600
+#define	DEFAULT_FLAGS	(TF_EVENP|TF_ODDP|TF_ECHO)
+
+
+/*
+ * A machine MUST have a console.  In our case
+ * things are a little complicated by the graphic
+ * display: people expect it to be their "console",
+ * but we'd like to be able to live without it.
+ * This is not to be confused with the "rconsole" thing:
+ * that just duplicates the console I/O to
+ * another place (for debugging/logging purposes).
+ *
+ * There is then another historical kludge: if
+ * there is a graphic display it is assumed that
+ * the minor "1" is the mouse, with some more
+ * magic attached to it.  And again, one might like to
+ * use the serial line 1 as a regular one.
+ *
+ */
+#define	user_console	0
+
+int	console = 0;
+
+int	(*console_probe)() = 0,
+	(*console_param)() = 0,
+	(*console_start)() = 0,
+	(*console_putc)() = 0,
+	(*console_getc)() = 0,
+	(*console_pollc)() = 0,
+	(*console_mctl)() = 0,
+	(*console_softCAR)() = 0;
+
+/*
+ * Lower-level (internal) interfaces, for printf and gets
+ */
+int cnunit = 0;		/* which unit owns the 'console' */
+int cnline = 0;		/* which line of that unit */
+int rcline = 3;		/* alternate, "remote console" line */
+
+rcoff()
+{
+	spl_t s = splhigh();
+	cnpollc(FALSE);
+	rcline = 0;
+	cnpollc(TRUE);
+	splx(s);
+}
+
+rcputc(c)
+{
+	if (rcline)
+		(*console_putc)( cnunit, rcline, c);
+}
+
+cnputc(c)
+{
+#if	NBM > 0
+	if (SCREEN_ISA_CONSOLE()) {
+		/* this does its own rcputc */
+		screen_blitc(SCREEN_CONS_UNIT(), c);
+	} else
+#endif	NBM > 0
+	       {
+		rcputc(c);
+		(*console_putc)( cnunit, cnline, c);/* insist on a console still */
+	}
+	if (c == '\n')
+		cnputc('\r');
+}
+
+cngetc()
+{
+	return (*console_getc)( cnunit, cnline, TRUE, FALSE);
+}
+
+cnpollc(bool)
+{
+	(*console_pollc)(cnunit, bool);
+}
+
+ 
+/* Debugger support */
+cnmaygetc()
+{
+	return (*console_getc)( cnunit, cnline, FALSE, FALSE);
+}
+
+
+#if	NBM > 0
+boolean_t
+screen_captures(line)
+	register int	line;
+{
+	return (SCREEN_ISA_CONSOLE() &&
+		((line == SCREEN_LINE_KEYBOARD) ||
+		 (line == SCREEN_LINE_POINTER)));
+}
+#endif
+
+/*
+ * Higher level (external) interface, for GP use
+ */
+
+
+/*
+ * This is basically a special form of autoconf,
+ * to get printf() going before true autoconf.
+ */
+cons_find(tube)
+	boolean_t tube;
+{
+	static struct bus_device d;
+	register int		 i;
+	struct tty		*tp;
+
+	for (i = 0; i < NCONSTTY; i++)
+		console_tty[i] = &console_tty_data[i];
+	/* the hardware device will set tp->t_addr for valid ttys */
+
+	d.unit = 0;
+
+	if ((console_probe == 0) ||
+	    ((*console_probe)(0, &d) == 0)) {
+		/* we have no console, but maybe that's ok */
+#if	defined(DECSTATION) || defined(FLAMINGO)
+		/* no, it is not */
+		dprintf("%s", "no console!\n");
+		halt();
+#endif
+		return 0;
+	}
+
+	/*
+	 * Remote console line
+	 */
+	find_rconsole(&rcline);
+
+	/*
+	 * Console always on unit 0. Fix if you need to
+	 */
+	cnunit = 0;
+
+#if	NBM > 0
+	if (tube && screen_probe(0)) {
+
+		/* associate screen to console iff */
+		if (console == user_console)
+			screen_console = cnunit | SCREEN_CONS_ENBL;
+		cnline = SCREEN_LINE_KEYBOARD;
+
+		/* mouse and keybd */
+		tp = console_tty[SCREEN_LINE_KEYBOARD];
+		tp->t_ispeed = B4800;
+		tp->t_ospeed = B4800;
+		tp->t_flags = TF_LITOUT|TF_EVENP|TF_ECHO|TF_XTABS|TF_CRMOD;
+		tp->t_dev = SCREEN_LINE_KEYBOARD;
+		(*console_param)(tp, SCREEN_LINE_KEYBOARD);
+
+		tp = console_tty[SCREEN_LINE_POINTER];
+		tp->t_ispeed = B4800;
+		tp->t_ospeed = B4800;
+		tp->t_flags = TF_LITOUT|TF_ODDP;
+		tp->t_dev = SCREEN_LINE_POINTER;
+		(*console_param)(tp, SCREEN_LINE_POINTER);
+		/* console_scan will turn on carrier */
+
+	} else {
+#endif	NBM > 0
+		/* use non-graphic console as console */
+		cnline = CONSOLE_SERIAL_LINE_NO;
+
+		tp = console_tty[cnline];
+		tp->t_ispeed = B9600;
+		tp->t_ospeed = B9600;
+		tp->t_flags = TF_LITOUT|TF_EVENP|TF_ECHO|TF_XTABS|TF_CRMOD;
+		(*console_softCAR)(cnunit, cnline, TRUE);
+		console = cnline;
+		tp->t_dev = console;
+		(*console_param)(tp, SCREEN_LINE_OTHER);
+#if	NBM > 0
+	}
+
+	/*
+	 * Enable rconsole interrupts for KDB
+	 */
+	if (tube && rcline != cnline) {
+		tp = console_tty[rcline];
+		tp->t_ispeed = B9600;
+		tp->t_ospeed = B9600;
+		tp->t_flags = TF_LITOUT|TF_EVENP|TF_ECHO|TF_XTABS|TF_CRMOD;
+		tp->t_dev = rcline;
+		(*console_softCAR)(cnunit, rcline, TRUE);
+		(*console_param)(tp, SCREEN_LINE_OTHER);
+	} else
+	 	rcline = 0;
+#endif	NBM > 0
+}
+
+/*
+ * Open routine
+ */
+extern int
+	cons_start(struct tty *),
+	cons_stop(struct tty *, int),
+	cons_mctl(struct tty *, int, int);
+
+cons_open(dev, flag, ior)
+	int	dev;
+	int	flag;
+	io_req_t ior;
+{
+	register struct tty	*tp;
+	register int		ttyno;
+ 
+	if (dev == user_console)
+		dev = console;
+
+	ttyno = dev;
+	if (ttyno >= NCONSTTY)
+		return D_NO_SUCH_DEVICE;
+	tp = console_tty[ttyno];
+
+	/* But was it there at probe time */
+	if (tp->t_addr == 0)
+		return D_NO_SUCH_DEVICE;
+
+	tp->t_start	= cons_start;
+	tp->t_stop	= cons_stop;
+	tp->t_mctl	= cons_mctl;
+
+#if	NBM > 0
+	if (screen_captures(ttyno))
+		screen_open(SCREEN_CONS_UNIT(), ttyno==SCREEN_LINE_KEYBOARD);
+#endif	NBM > 0
+
+	if ((tp->t_state & TS_ISOPEN) == 0) {
+		if (tp->t_ispeed == 0) {
+			tp->t_ispeed = DEFAULT_SPEED;
+			tp->t_ospeed = DEFAULT_SPEED;
+			tp->t_flags = DEFAULT_FLAGS;
+		}
+		tp->t_dev = dev;
+		(*console_param)(tp, ttyno);
+	}
+
+	return (char_open(dev, tp, flag, ior));
+}
+
+
+/*
+ * Close routine
+ */
+cons_close(dev, flag)
+	int dev;
+{
+	register struct tty	*tp;
+	register int		ttyno;
+	spl_t s;
+ 
+	if (dev == user_console)
+		dev = console;
+
+	ttyno = dev;
+
+#if	NBM > 0
+	if (screen_captures(ttyno))
+		screen_close(SCREEN_CONS_UNIT(), ttyno==SCREEN_LINE_KEYBOARD);
+#endif	NBM > 0
+
+	tp = console_tty[ttyno];
+
+	s = spltty();
+	simple_lock(&tp->t_lock);
+
+	ttyclose(tp);
+
+	simple_unlock(&tp->t_lock);
+	splx(s);
+}
+
+cons_read(dev, ior)
+	int			dev;
+	register io_req_t	ior;
+{
+	register struct tty	*tp;
+	register 		ttyno;
+ 
+	if (dev == user_console)
+		dev = console;
+
+	ttyno = dev;
+#if	NBM > 0
+	if (SCREEN_ISA_CONSOLE() && (ttyno == SCREEN_LINE_POINTER))
+		return screen_read(SCREEN_CONS_UNIT(), ior);
+#endif	NBM > 0
+
+	tp = console_tty[ttyno];
+	return char_read(tp, ior);
+}
+ 
+
+cons_write(dev, ior)
+	int			dev;
+	register io_req_t	ior;
+{
+	register struct tty	*tp;
+	register		ttyno;
+
+	if (dev == user_console)
+		dev = console;
+
+	ttyno = dev;
+#if	NBM > 0
+	if (screen_captures(ttyno))
+		return screen_write(SCREEN_CONS_UNIT(), ior);
+#endif	NBM > 0
+
+	tp = console_tty[ttyno];
+	return char_write(tp, ior);
+}
+
+/*
+ * Start output on a line
+ */
+cons_start(tp)
+	register struct tty *tp;
+{
+	spl_t			s;
+ 
+	s = spltty();
+	if (tp->t_state & (TS_TIMEOUT|TS_BUSY|TS_TTSTOP))
+		goto out;
+
+	if (tp->t_outq.c_cc == 0)
+		goto out;
+
+	tp->t_state |= TS_BUSY;
+
+	(*console_start)(tp);
+
+out:
+	splx(s);
+}
+
+/*
+ * Stop output on a line.
+ */
+cons_stop(tp, flag)
+	register struct tty *tp;
+{
+	register spl_t s;
+
+	s = spltty();
+	if (tp->t_state & TS_BUSY) {
+		if ((tp->t_state&TS_TTSTOP)==0)
+			tp->t_state |= TS_FLUSH;
+	}
+	splx(s);
+}
+ 
+
+/*
+ * Modem control
+ */
+cons_mctl(
+	struct tty	*tp,
+	int		bits,
+	int		how)
+{
+	return (*console_mctl)(tp->t_dev, bits, how);
+}
+
+/*
+ * Abnormal close
+ */
+cons_portdeath(dev, port)
+	int	dev;
+	mach_port_t port;
+{
+	if (dev == user_console)
+		dev = console;
+	return (tty_portdeath(console_tty[dev], port));
+}
+
+/*
+ * Get/Set status rotuines
+ */
+io_return_t
+cons_get_status(dev, flavor, data, status_count)
+	int		dev;
+	dev_flavor_t	flavor;
+	int *		data;		/* pointer to OUT array */
+	unsigned int	*status_count;		/* out */
+{
+	register struct tty *tp;
+	register int	ttyno;
+
+	if (dev == user_console)
+		dev = console;
+
+	ttyno = dev;
+
+#if	NBM > 0
+	if (screen_captures(ttyno) &&
+	    (screen_get_status(SCREEN_CONS_UNIT(),
+			flavor, data, status_count) == D_SUCCESS))
+		return D_SUCCESS;
+#endif	NBM > 0
+
+	tp = console_tty[ttyno];
+
+	switch (flavor) {
+	    case TTY_MODEM:
+		/* Take all bits */
+		*data = (*console_mctl)(dev, -1, DMGET);
+		*status_count = 1;
+		break;
+	    default:
+		return (tty_get_status(tp, flavor, data, status_count));
+	}
+	return (D_SUCCESS);
+}
+
+io_return_t
+cons_set_status(dev, flavor, data, status_count)
+	int		dev;
+	dev_flavor_t	flavor;
+	int *		data;
+	unsigned int	status_count;
+{
+	register struct tty *tp;
+	register int	ttyno;
+
+	if (dev == user_console)
+		dev = console;
+
+	ttyno = dev;
+
+#if	NBM > 0
+	if (screen_captures(ttyno) &&
+	    (screen_set_status(SCREEN_CONS_UNIT(),
+			flavor, data, status_count) == D_SUCCESS))
+		return D_SUCCESS;
+#endif	NBM > 0
+
+	tp  = console_tty[ttyno];
+
+	switch (flavor) {
+	    case TTY_MODEM:
+		if (status_count < TTY_MODEM_COUNT)
+		    return (D_INVALID_OPERATION);
+		(void) (*console_mctl)(dev, *data, DMSET);
+		break;
+
+	    case TTY_SET_BREAK:
+		(void) (*console_mctl)(dev, TM_BRK, DMBIS);
+		break;
+
+	    case TTY_CLEAR_BREAK:
+		(void) (*console_mctl)(dev, TM_BRK, DMBIC);
+		break;
+
+	    case TTY_STATUS:
+	    {
+		register int error = D_SUCCESS;
+		struct tty_status *tsp;
+
+		/*
+		 * Defend from noise. The cshell...
+		 */
+		tsp = (struct tty_status *)data;
+		if ((tsp->tt_ispeed != tp->t_ispeed) ||
+		    (tsp->tt_ospeed != tp->t_ospeed) ||
+		    (tsp->tt_breakc != tp->t_breakc) ||
+		    ((tsp->tt_flags & ~TF_HUPCLS) != tp->t_flags)) {
+
+			error = tty_set_status(tp, flavor, data, status_count);
+			if (error == 0) {
+			    spl_t s = spltty();
+			    tp->t_state &= ~(TS_BUSY|TS_FLUSH);
+			    (*console_param)(tp, ttyno);
+			    splx(s);
+			}
+		} else
+		if (tsp->tt_flags & TF_HUPCLS)
+			tp->t_state |= TS_HUPCLS;
+		return (error);
+	    }
+	    default:
+		return (tty_set_status(tp, flavor, data, status_count));
+	}
+	return (D_SUCCESS);
+}
+
+
+/*
+ * A simple scheme to dispatch interrupts.
+ *
+ * This deals with the fairly common case where we get an
+ * interrupt on each rx/tx character.  A more elaborate
+ * scheme [someday here too..] would handle instead many
+ * characters per interrupt, perhaps using a DMA controller
+ * or a large SILO.  Note that it is also possible to simulate
+ * a DMA chip with 'pseudo-dma' code that runs directly down
+ * in the interrupt routine.
+ */
+ 
+/*
+ * We just received a character, ship it up for further processing.
+ * Arguments are the tty number for which it is meant, a flag that
+ * indicates a keyboard or mouse is potentially attached to that
+ * tty (-1 if not), the character proper stripped down to 8 bits,
+ * and an indication of any error conditions associated with the
+ * receipt of the character.
+ * We deal here with rconsole input handling and dispatching to
+ * mouse or keyboard translation routines. cons_input() does
+ * the rest.
+ */
+#if	MACH_KDB
+int	l3break = 0x10;		/* dear old ^P, we miss you so bad. */
+#endif	MACH_KDB
+
+cons_simple_rint(ttyno, line, c, err)
+	int		line;
+	int		c;
+{
+	/*
+	 * Rconsole. Drop in the debugger on break or ^P.
+	 * Otherwise pretend input came from keyboard.
+	 */
+	if (rcline && ttyno == rcline) {
+#if	MACH_KDB
+		if ((err & CONS_ERR_BREAK) ||
+		    ((c & 0x7f) == l3break))
+			return gimmeabreak();
+#endif	/* MACH_KDB */
+		ttyno = console;
+		goto process_it;
+	}
+
+#if	NBM > 0
+	if (screen_captures(line)) {
+		if (line == SCREEN_LINE_POINTER)
+			return mouse_input(SCREEN_CONS_UNIT(), c);
+		if (line == SCREEN_LINE_KEYBOARD) {
+			c = lk201_rint(SCREEN_CONS_UNIT(), c, FALSE, FALSE);
+			if (c == -1)
+				return; /* shift or bad char */
+		}
+	}
+#endif	NBM > 0
+process_it:
+	cons_input(ttyno, c, err);
+}
+
+/*
+ * Send along a character on a tty.  If we were waiting for
+ * this char to complete the open procedure do so; check
+ * for errors; if all is well proceed to ttyinput().
+ */
+cons_input(ttyno, c, err)
+{
+	register struct tty *tp;
+
+	tp  = console_tty[ttyno];
+
+	if ((tp->t_state & TS_ISOPEN) == 0) {
+		tt_open_wakeup(tp);
+		return;
+	}
+	if (err) {
+		if (err & CONS_ERR_OVERRUN)
+			log(LOG_WARNING, "sl%d: silo overflow\n", ttyno);
+
+		if (err & CONS_ERR_PARITY)	
+			if (((tp->t_flags & (TF_EVENP|TF_ODDP)) == TF_EVENP)
+			  || ((tp->t_flags & (TF_EVENP|TF_ODDP)) == TF_ODDP))
+				return;
+		if (err & CONS_ERR_BREAK)	/* XXX autobaud XXX */
+			c = tp->t_breakc;
+	}
+	ttyinput(c, tp);
+}
+ 
+/*
+ * Transmission of a character is complete.
+ * Return the next character or -1 if none.
+ */
+cons_simple_tint(ttyno, all_sent)
+	boolean_t	all_sent;
+{
+	register struct tty *tp;
+ 
+	tp = console_tty[ttyno];
+	if ((tp->t_addr == 0) || /* not probed --> stray */
+	    (tp->t_state & TS_TTSTOP))
+		return -1;
+
+	if (all_sent) {
+		tp->t_state &= ~TS_BUSY;
+		if (tp->t_state & TS_FLUSH)
+			tp->t_state &= ~TS_FLUSH;
+
+		cons_start(tp);
+	}
+
+	if (tp->t_outq.c_cc == 0 || (tp->t_state&TS_BUSY)==0)
+		return -1;
+
+	return getc(&tp->t_outq);
+}
+
+ 
+
+
+
+#endif	/*NCONSTTY > 0*/