Initial source

1 files changed, 649 insertions, 0 deletions

diff --git a/chips/dz_hdw.c b/chips/dz_hdw.c
new file mode 100644
index 0000000..fa47282
--- /dev/null
+++ b/chips/dz_hdw.c
@@ -0,0 +1,649 @@
+/* 
+ * 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: dz_hdw.c
+ * 	Author: Alessandro Forin, Carnegie Mellon University
+ *	Date:	9/90
+ *
+ *	Hardware-level operations for the DZ Serial Line Driver
+ */
+
+#include <dz_.h>
+#if	NDZ_ > 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 <chips/busses.h>
+#include <chips/screen_defs.h>
+#include <chips/serial_defs.h>
+
+#include <chips/dz_7085.h>
+
+
+#ifdef	DECSTATION
+#include <mips/mips_cpu.h>
+#include <mips/PMAX/kn01.h>
+#define	DZ_REGS_DEFAULT		(vm_offset_t)PHYS_TO_K1SEG(KN01_SYS_DZ)
+#define	PAD(n)			char n[6];
+#endif	/*DECSTATION*/
+
+#ifdef	VAXSTATION
+#define	DZ_REGS_DEFAULT		0
+#define wbflush()
+#define check_memory(addr,dow)  ((dow) ? wbadaddr(addr,4) : badaddr(addr,4))
+#define	PAD(n)			char n[2];
+#endif	/*VAXSTATION*/
+
+#ifndef	PAD
+#define	PAD(n)
+#endif
+
+typedef struct {
+	volatile unsigned short	dz_csr;		/* Control and Status */
+								PAD(pad0)
+	volatile unsigned short	dz_rbuf;	/* Rcv buffer (RONLY) */
+								PAD(pad1)
+	volatile unsigned short	dz_tcr;		/* Xmt control (R/W)*/
+	 							PAD(pad2)
+	volatile unsigned short	dz_tbuf;	/* Xmt buffer (WONLY)*/
+#	define 			dz_lpr dz_rbuf	/* Line parameters (WONLY)*/
+#	define 			dz_msr dz_tbuf	/* Modem status (RONLY)*/
+								PAD(pad3)
+} dz_padded_regmap_t;
+
+
+/* this is ok both for rcv (char) and xmt (csr) */
+#define	LINEOF(x)	(((x) >> 8) & 0x3)
+
+/*
+ * Driver status
+ */
+struct dz7085_softc {
+	dz_padded_regmap_t	*regs;
+	unsigned short	breaks;
+	unsigned short	fake;	/* missing rs232 bits */
+	int		polling_mode;
+	unsigned short	prev_msr;
+	char		softCAR;
+} dz7085_softc_data[NDZ_];
+
+typedef struct dz7085_softc *dz7085_softc_t;
+
+dz7085_softc_t	dz7085_softc[NDZ_];
+
+static void		check_car();
+static void		check_ring();
+
+dz7085_softCAR(unit, line, on)
+{
+	if (on)
+		dz7085_softc[unit]->softCAR |= 1<<line;
+	else
+		dz7085_softc[unit]->softCAR &= ~(1 << line);
+}
+
+static
+short	dz7085_speeds[] =
+	{ 0, DZ_LPAR_50, DZ_LPAR_75, DZ_LPAR_110, DZ_LPAR_134_5, DZ_LPAR_150,
+	  0, DZ_LPAR_300, DZ_LPAR_600, DZ_LPAR_1200, DZ_LPAR_1800, DZ_LPAR_2400,
+	  DZ_LPAR_4800, DZ_LPAR_9600, DZ_LPAR_MAX_SPEED, 0 };
+
+
+/*
+ * Definition of the driver for the auto-configuration program.
+ */
+
+int	dz7085_probe(), dz7085_intr();
+static void	dz7085_attach();
+
+vm_offset_t	dz7085_std[NDZ_] = { DZ_REGS_DEFAULT, };
+struct	bus_device *dz7085_info[NDZ_];
+struct	bus_driver dz_driver = 
+        { dz7085_probe, 0, dz7085_attach, 0, dz7085_std, "dz", dz7085_info,};
+
+/*
+ * Adapt/Probe/Attach functions
+ */
+
+static boolean_t 	dz7085_full_modem = FALSE;
+boolean_t		dz7085_uses_modem_control = FALSE;/* patch this with adb */
+
+set_dz_address( unit, regs, has_modem)
+	vm_offset_t		regs;
+	boolean_t	has_modem;
+{
+	extern int	dz7085_probe(), dz7085_param(), dz7085_start(),
+			dz7085_putc(), dz7085_getc(),
+			dz7085_pollc(), dz7085_mctl(), dz7085_softCAR();
+
+	dz7085_std[unit] = regs;
+	dz7085_full_modem = has_modem & dz7085_uses_modem_control;
+
+	/* Do this here */
+	console_probe		= dz7085_probe;
+	console_param		= dz7085_param;
+	console_start		= dz7085_start;
+	console_putc		= dz7085_putc;
+	console_getc		= dz7085_getc;
+	console_pollc		= dz7085_pollc;
+	console_mctl		= dz7085_mctl;
+	console_softCAR		= dz7085_softCAR;
+
+}
+
+dz7085_probe( xxx, ui)
+	struct bus_device *ui;
+{
+	int             unit = ui->unit;
+	dz7085_softc_t      sc;
+	register int	cntr;
+	register dz_padded_regmap_t	*regs;
+
+	static int probed_once = 0;
+
+	regs = (dz_padded_regmap_t *)dz7085_std[unit];	/* like the old days! */
+	if (regs == 0)
+		return 0;
+	/*
+	 * If this is not there we are toast 
+	 */
+	if (check_memory(regs, 0))
+		return 0;
+
+	if (probed_once++)
+		return 1;
+
+	sc = &dz7085_softc_data[unit];
+	dz7085_softc[unit] = sc;
+	sc->regs = regs;
+
+	for (cntr = unit*NDZ_LINE; cntr < NDZ_LINE*(unit+1); cntr++) {
+		console_tty[cntr]->t_addr = (char*)regs;
+		console_tty[cntr]->t_state |= TS_MIN;
+	}
+
+	/* pmaxen et al. lack many modem bits */
+	dz7085_set_modem_control(sc, dz7085_full_modem);
+
+	regs->dz_tcr = 0;/* disable all lines, drop RTS,DTR */
+	return 1;
+}
+
+boolean_t dz7085_timer_started = FALSE;
+
+static void
+dz7085_attach(ui)
+	register struct bus_device *ui;
+{
+	int unit = ui->unit;
+	extern dz7085_scan();
+	extern int tty_inq_size;
+	int i;
+
+	/* We only have 4 ttys, but always at 9600
+	 * Give em a lot of room
+	 */
+	tty_inq_size = 2048;
+	for (i = 0; i < (NDZ_*NDZ_LINE); i++)
+		ttychars(console_tty[i]);
+
+	if (!dz7085_timer_started) {
+		dz7085_timer_started = TRUE;
+		dz7085_scan();
+	}
+
+#if	NBM > 0
+	if (SCREEN_ISA_CONSOLE()) {
+		printf("\n sl0: "); lk201_attach(0, unit);
+		printf("\n sl1: "); mouse_attach(0, unit);
+		printf("\n sl2: \n sl3: ");
+		if (rcline == 3) printf("( rconsole )");
+	} else {
+#endif	/*NBM > 0*/
+		printf("\n sl0:\n sl1:\n sl2:\n sl3: ( alternate console )");
+#if	NBM > 0
+	}
+#endif
+}
+
+/*
+ * Would you like to make a phone call ?
+ */
+dz7085_set_modem_control(sc, on)
+	dz7085_softc_t      sc;
+	boolean_t	on;
+{
+	if (on)
+		/* your problem if the hardware then is broke */
+		sc->fake = 0;
+	else
+		sc->fake = DZ_MSR_CTS3|DZ_MSR_DSR3|DZ_MSR_CD3|
+			   DZ_MSR_CTS2|DZ_MSR_CD2;
+}
+
+/*
+ * Polled I/O (debugger)
+ */
+dz7085_pollc(unit, on)
+	boolean_t		on;
+{
+	dz7085_softc_t		sc = dz7085_softc[unit];
+
+	if (on) {
+		sc->polling_mode++;
+#if	NBM > 0
+		screen_on_off(unit, TRUE);
+#endif	NBM > 0
+	} else
+		sc->polling_mode--;
+}
+
+/*
+ * Interrupt routine
+ */
+dz_intr(unit,spllevel)
+	spl_t	spllevel;
+{
+	dz7085_softc_t		sc = dz7085_softc[unit];
+	register dz_padded_regmap_t	*regs = sc->regs;
+	register short		csr;
+
+	csr = regs->dz_csr;
+
+	if (csr & DZ_CSR_TRDY) {
+		register int             c;
+
+		c = cons_simple_tint(unit*NDZ_LINE + LINEOF(csr), FALSE);
+		if (c == -1) {
+			/* no more data for this line */
+			regs->dz_tcr &= ~(1 << LINEOF(csr));
+			c = cons_simple_tint(unit*NDZ_LINE + LINEOF(csr), TRUE);
+			/* because funny race possible ifnot */
+		}
+		if (c != -1) {
+			regs->dz_tbuf = (c & 0xff) | sc->breaks;
+			/* and leave it enabled */
+		}
+	}
+	if (sc->polling_mode)
+		return;
+
+	while (regs->dz_csr & DZ_CSR_RDONE) {
+		short           c = regs->dz_rbuf;
+		spl_t		oldspl;
+
+#ifdef	DECSTATION
+		oldspl = splhigh();
+		splx(spllevel);
+#endif	/*DECSTATION*/
+		cons_simple_rint(unit*NDZ_LINE+LINEOF(c), LINEOF(c),
+				c&0xff, c&0xff00);
+#ifdef	DECSTATION
+		splx(oldspl);
+#endif	/*DECSTATION*/
+	}
+}
+
+/*
+ * Start transmission on a line
+ */
+dz7085_start(tp)
+	struct tty *tp;
+{
+	register dz_padded_regmap_t	*regs;
+	register int		line;
+
+	line = tp->t_dev;
+
+	regs = (dz_padded_regmap_t*)tp->t_addr;
+	regs->dz_tcr |= (1<<(line&3));
+
+	/* no, we do not need a char out to interrupt */
+}
+
+/*
+ * Get a char from a specific DZ line
+ */
+dz7085_getc( unit, line, wait, raw )
+	boolean_t	wait;
+	boolean_t	raw;
+{
+	dz7085_softc_t      sc = dz7085_softc[unit];
+	spl_t               s = spltty();
+	register dz_padded_regmap_t *regs = sc->regs;
+	unsigned short  c;
+	int             rl;
+
+again:
+	/*
+	 * wait till something in silo 
+	 */
+	while ((regs->dz_csr & DZ_CSR_RDONE) == 0 && wait)
+		delay(10);
+	c = regs->dz_rbuf;
+
+	/*
+	 * check if right line. For keyboard, rconsole is ok too 
+	 */
+	rl = LINEOF(c);
+	if (wait && (line != rl) &&
+	    !((line == DZ_LINE_KEYBOARD) && rcline == rl))
+		goto again;
+	/*
+	 * bad chars not ok 
+	 */
+	if ((c & (DZ_RBUF_PERR | DZ_RBUF_OERR | DZ_RBUF_FERR)) && wait)
+		goto again;
+
+	splx(s);
+
+	/*
+	 * if nothing found return -1 
+	 */
+	if ( ! (c & DZ_RBUF_VALID))
+		return -1;
+
+#if	NBM > 0
+	if ((rl == DZ_LINE_KEYBOARD) && !raw && SCREEN_ISA_CONSOLE())
+		return lk201_rint(SCREEN_CONS_UNIT(), c, wait, sc->polling_mode);
+	else
+#endif	NBM > 0
+		return c & DZ_RBUF_CHAR;
+}
+
+/*
+ * Put a char on a specific DZ line
+ */
+dz7085_putc( unit, line, c )
+{
+	dz7085_softc_t      sc = dz7085_softc[unit];
+	register dz_padded_regmap_t *regs = sc->regs;
+	spl_t               s = spltty();
+
+	/*
+	 * do not change the break status of other lines 
+	 */
+	c = (c & 0xff) | sc->breaks;
+
+	/*
+	 * Xmit line info only valid if TRDY,
+	 * but never TRDY if no xmit enabled
+	 */
+	if ((regs->dz_tcr & DZ_TCR_LNENB) == 0)
+		goto select_it;
+
+	while ((regs->dz_csr & DZ_CSR_TRDY) == 0)
+		delay(100);
+
+	/*
+	 * see if by any chance we are already on the right line 
+	 */
+	if (LINEOF(regs->dz_csr) == line)
+		regs->dz_tbuf = c;
+	else {
+		unsigned short tcr;
+select_it:
+		tcr = regs->dz_tcr;
+		regs->dz_tcr = (1 << line) | (tcr & 0xff00);
+		wbflush();
+
+		do
+			delay(2);
+		while ((regs->dz_csr & DZ_CSR_TRDY) == 0 ||
+		       (LINEOF(regs->dz_csr) != line));
+
+		regs->dz_tbuf = c;
+		wbflush();
+
+		/* restore previous settings */
+		regs->dz_tcr = tcr;
+	}
+
+	splx(s);
+}
+
+
+dz7085_param(tp, line)
+	register struct tty	*tp;
+	register int		line;
+{
+	register dz_padded_regmap_t *regs;
+	register int lpr;
+ 
+	line = tp->t_dev;
+	regs = dz7085_softc[line/NDZ_LINE]->regs;
+
+	/*
+	 * Do not let user fool around with kbd&mouse
+	 */
+#if	NBM > 0
+	if (screen_captures(line)) {
+		tp->t_ispeed = tp->t_ospeed = B4800;
+		tp->t_flags |= TF_LITOUT;
+	}
+#endif	NBM > 0
+	regs->dz_csr = DZ_CSR_MSE|DZ_CSR_RIE|DZ_CSR_TIE;
+	if (tp->t_ispeed == 0) {
+		(void) (*console_mctl)(tp->t_dev, TM_HUP, DMSET);	/* hang up line */
+		return;
+	}
+/* 19200/38400 here */
+	lpr = dz7085_speeds[tp->t_ispeed] | (line&DZ_LPAR_LINE) | DZ_LPAR_ENABLE;
+	lpr |= DZ_LPAR_8BITS;
+
+	if ((tp->t_flags & (TF_ODDP|TF_EVENP)) == TF_ODDP)
+		lpr |= DZ_LPAR_ODD_PAR;
+
+	if (tp->t_ispeed == B110)
+		lpr |= DZ_LPAR_STOP;
+	regs->dz_lpr = lpr;
+}
+ 
+/*
+ * This is a total mess: not only are bits spread out in
+ * various registers, but we have to fake some for pmaxen.
+ */
+dz7085_mctl(dev, bits, how)
+	int dev;
+	int bits, how;
+{
+	register dz_padded_regmap_t *regs;
+	register int unit;
+	register int tcr, msr, brk, n_tcr, n_brk;
+	int b;
+	spl_t s;
+	dz7085_softc_t      sc;
+
+	unit = dev;
+
+	/* no modem support on lines 0 & 1 */
+/* XXX break on 0&1 */
+	if ((unit & 2) == 0)
+		return TM_LE|TM_DTR|TM_CTS|TM_CAR|TM_DSR;
+
+	b = 1 ^ (unit & 1);	/* line 2 ? */
+	
+	sc = dz7085_softc[unit>>2];
+	regs = sc->regs;
+	s = spltty();
+
+	tcr = ((regs->dz_tcr | (sc->fake>>4)) & 0xf00) >> (8 + b*2);
+	brk = (sc->breaks >> (8 + (unit&3))) & 1;	/* THE break bit */
+
+	n_tcr = (bits & (TM_RTS|TM_DTR)) >> 1;
+	n_brk = (bits & TM_BRK) >> 9;
+
+	/* break transitions, must 'send' a char out */
+	bits = (brk ^ n_brk) & 1;
+
+	switch (how) {
+	case DMSET:
+		tcr = n_tcr;
+		brk = n_brk;
+		break;
+
+	case DMBIS:
+		tcr |= n_tcr;
+		brk |= n_brk;
+		break;
+
+	case DMBIC:
+		tcr &= ~n_tcr;
+		brk = 0;
+		break;
+
+	case DMGET:
+		msr = ((regs->dz_msr|sc->fake) & 0xf0f) >> (b*8);
+		(void) splx(s);
+		return  (tcr<<1)|/* DTR, RTS */
+			((msr&1)<<5)|/* CTS */
+			((msr&2)<<7)|/* DSR */
+			((msr&0xc)<<4)|/* CD, RNG */
+			(brk << 9)|/* BRK */
+			TM_LE;
+	}
+	n_tcr =	(regs->dz_tcr & ~(3 << (8 + b*2))) |
+		(tcr << (8 + b*2));
+
+	regs->dz_tcr = n_tcr;
+	sc->fake = (sc->fake & 0xf0f) | (n_tcr<<4&0xf000);
+
+	sc->breaks = (sc->breaks & ~(1 << (8 + (unit&3)))) |
+		    (brk << (8 + (unit&3)));
+	if(bits) (*console_putc)( unit>>2, unit&3, 0);/* force break, now */
+	(void) splx(s);
+	return 0;/* useless to compute it */
+}
+
+/*
+ * Periodically look at the CD signals:
+ * they do not generate interrupts.
+ */
+dz7085_scan()
+{
+	register i;
+	register dz_padded_regmap_t *regs;
+	register msr;
+	register struct tty *tp;
+ 
+	for (i = 0; i < NDZ_; i++) {
+		dz7085_softc_t      sc = dz7085_softc[i];
+		register int	temp;
+
+		if (sc == 0)
+			continue;
+		regs = sc->regs;
+
+		tp = console_tty[i * NDZ_LINE];
+
+		msr = regs->dz_msr | (sc->fake & 0xf0f);
+		if (temp = sc->softCAR) {
+			if (temp & 0x4)
+				msr |= DZ_MSR_CD2 | DZ_MSR_CTS2;
+			if (temp & 0x8)
+				msr |= DZ_MSR_CD3 | DZ_MSR_CTS3;
+		}
+
+		/* Lines 0 and 1 have carrier on by definition */
+		/* [horrid casts cuz compiler stupid] */
+		check_car((char*)tp + 0*sizeof(struct tty), 1);
+		check_car((char*)tp + 1*sizeof(struct tty), 1);
+		check_car((char*)tp + 2*sizeof(struct tty), msr & DZ_MSR_CD2);
+		check_car((char*)tp + 3*sizeof(struct tty), msr & DZ_MSR_CD3);
+
+		/* nothing else to do if no msr transitions */
+		if ((temp = sc->prev_msr) == msr)
+			continue;
+		else
+			sc->prev_msr = msr;
+
+		/* see if we have an incoming call */
+#define	RING	(DZ_MSR_RI2|DZ_MSR_RI3)
+		if ((msr & RING) != (temp & RING)) {
+/*printf("%s %x->%x\n", "ET Phone RI", temp & RING, msr & RING);*/
+			check_ring((char*)tp + 2*sizeof(struct tty),
+				msr & DZ_MSR_RI2, temp & DZ_MSR_RI2);
+			check_ring((char*)tp + 3*sizeof(struct tty),
+				msr & DZ_MSR_RI3, temp & DZ_MSR_RI3);
+		}
+#undef RING
+		/* see if we must do flow-control */
+		if ((msr ^ temp) & DZ_MSR_CTS2) {
+			tty_cts((char*)tp + 2*sizeof(struct tty),
+				msr & DZ_MSR_CTS2);
+		}
+		if ((msr ^ temp) & DZ_MSR_CTS3) {
+			tty_cts((char*)tp + 3*sizeof(struct tty),
+				msr & DZ_MSR_CTS3);
+		}
+	}
+	timeout(dz7085_scan, (vm_offset_t)0, 2*hz);
+}
+
+static dz7085_hup(tp)
+	register struct tty *tp;
+{
+	(*console_mctl)(tp->t_dev, TM_DTR, DMBIC);
+}
+
+static void check_car(tp, car)
+	register struct tty *tp;
+{
+	if (car) {
+		/* cancel modem timeout if need to */
+		if (car & (DZ_MSR_CD2|DZ_MSR_CD3))
+			untimeout(dz7085_hup, (vm_offset_t)tp);
+
+		/* I think this belongs in the MI code */
+		if (tp->t_state & TS_WOPEN)
+			tp->t_state |= TS_ISOPEN;
+		/* carrier present */
+		if ((tp->t_state & TS_CARR_ON) == 0)
+			(void)ttymodem(tp, 1);
+	} else if ((tp->t_state&TS_CARR_ON) && ttymodem(tp, 0) == 0)
+		(*console_mctl)( tp->t_dev, TM_DTR, DMBIC);
+}
+
+int	dz7085_ring_timeout	= 60;	/* seconds, patchable */
+
+static void check_ring(tp, ring, oring)
+	register struct tty *tp;
+{
+	if (ring == oring)
+		return;
+	if (ring) {
+		(*console_mctl)( tp->t_dev, TM_DTR, DMBIS);
+		/* give it ample time to find the right carrier */
+		timeout(dz7085_hup, (vm_offset_t)tp, dz7085_ring_timeout*hz);
+	}
+}
+#endif	NDZ_ > 0