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diff --git a/chips/dz_hdw.c b/chips/dz_hdw.c
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+/*
+ * 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
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