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dz_ebus.c revision 1.9.4.1
      1  1.9.4.1    martin /*	$NetBSD: dz_ebus.c,v 1.9.4.1 2020/04/08 14:07:33 martin Exp $	*/
      2      1.1     pooka 
      3      1.1     pooka /*-
      4      1.1     pooka  * Copyright (c) 2010 The NetBSD Foundation, Inc.
      5      1.1     pooka  * All rights reserved.
      6      1.1     pooka  *
      7      1.1     pooka  * This code was written by Alessandro Forin and Neil Pittman
      8      1.1     pooka  * at Microsoft Research and contributed to The NetBSD Foundation
      9      1.1     pooka  * by Microsoft Corporation.
     10      1.1     pooka  *
     11      1.1     pooka  * Redistribution and use in source and binary forms, with or without
     12      1.1     pooka  * modification, are permitted provided that the following conditions
     13      1.1     pooka  * are met:
     14      1.1     pooka  * 1. Redistributions of source code must retain the above copyright
     15      1.1     pooka  *    notice, this list of conditions and the following disclaimer.
     16      1.1     pooka  * 2. Redistributions in binary form must reproduce the above copyright
     17      1.1     pooka  *    notice, this list of conditions and the following disclaimer in the
     18      1.1     pooka  *    documentation and/or other materials provided with the distribution.
     19      1.1     pooka  *
     20      1.1     pooka  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     21      1.1     pooka  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     22      1.1     pooka  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     23      1.1     pooka  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     24      1.1     pooka  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     25      1.1     pooka  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     26      1.1     pooka  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     27      1.1     pooka  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     28      1.1     pooka  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     29      1.1     pooka  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     30      1.1     pooka  * POSSIBILITY OF SUCH DAMAGE.
     31      1.1     pooka  */
     32      1.1     pooka 
     33      1.1     pooka #include <sys/cdefs.h>
     34  1.9.4.1    martin __KERNEL_RCSID(0, "$NetBSD: dz_ebus.c,v 1.9.4.1 2020/04/08 14:07:33 martin Exp $");
     35      1.1     pooka 
     36      1.1     pooka #include "opt_ddb.h"
     37      1.1     pooka 
     38      1.1     pooka #include <sys/param.h>
     39      1.1     pooka #include <sys/systm.h>
     40      1.1     pooka #include <sys/callout.h>
     41      1.1     pooka #include <sys/ioctl.h>
     42      1.1     pooka #include <sys/tty.h>
     43      1.1     pooka #include <sys/proc.h>
     44      1.1     pooka #include <sys/buf.h>
     45      1.1     pooka #include <sys/conf.h>
     46      1.1     pooka #include <sys/file.h>
     47      1.1     pooka #include <sys/uio.h>
     48      1.1     pooka #include <sys/kernel.h>
     49      1.1     pooka #include <sys/syslog.h>
     50      1.1     pooka #include <sys/device.h>
     51      1.1     pooka #include <sys/kauth.h>
     52      1.1     pooka 
     53      1.1     pooka #include <machine/bus.h>
     54      1.1     pooka #include <machine/emipsreg.h>
     55      1.1     pooka 
     56      1.1     pooka #include <dev/cons.h>
     57      1.1     pooka 
     58      1.1     pooka 
     59      1.1     pooka #include <emips/ebus/ebusvar.h>
     60      1.1     pooka #include <emips/emips/cons.h>
     61      1.3   tsutsui #if 0
     62      1.3   tsutsui #include <emips/emips/machdep.h>
     63      1.3   tsutsui #endif
     64      1.1     pooka 
     65      1.1     pooka #include "ioconf.h" /* for dz_cd */
     66      1.1     pooka 
     67      1.3   tsutsui #define DZ_C2I(c)	((c) << 3)	/* convert controller # to index */
     68      1.3   tsutsui #define DZ_I2C(c)	((c) >> 3)	/* convert minor to controller # */
     69      1.3   tsutsui #define DZ_PORT(u)	((u) & 07)	/* extract the port # */
     70      1.1     pooka 
     71      1.1     pooka struct	dz_softc {
     72      1.4   tsutsui 	device_t	sc_dev;		/* Autoconf blaha */
     73  1.9.4.1    martin 	struct	evcnt	sc_rintrcnt;	/* receive interrupt counts */
     74      1.1     pooka 	struct	evcnt	sc_tintrcnt;	/* transmit interrupt counts */
     75      1.1     pooka 	struct	_Usart	*sc_dr;		/* reg pointers */
     76      1.1     pooka 	bus_space_tag_t	sc_iot;
     77      1.1     pooka 	bus_space_handle_t sc_ioh;
     78      1.1     pooka 	int		sc_consline;	/* console line, or -1 */
     79      1.1     pooka 	int		sc_rxint;	/* Receive interrupt count XXX */
     80      1.1     pooka 	u_char		sc_brk;		/* Break asserted on some lines */
     81      1.1     pooka 	u_char		sc_dsr;		/* DSR set bits if no mdm ctrl */
     82      1.1     pooka 	struct dz_linestate {
     83      1.1     pooka 		struct	dz_softc *dz_sc;	/* backpointer to softc */
     84      1.1     pooka 		int		dz_line;	/* channel number */
     85      1.3   tsutsui 		struct	tty	*dz_tty;	/* what we work on */
     86      1.1     pooka 	} sc_dz;
     87      1.1     pooka };
     88      1.1     pooka 
     89      1.1     pooka void	dzrint(struct dz_softc *, uint32_t);
     90      1.1     pooka void	dzxint(struct dz_softc *, uint32_t);
     91      1.1     pooka 
     92      1.1     pooka #ifndef TIOCM_BRK
     93      1.1     pooka #define TIOCM_BRK		0100000		/* no equivalent */
     94      1.1     pooka 
     95      1.1     pooka static void	dzstart(struct tty *);
     96      1.1     pooka static int	dzparam(struct tty *, struct termios *);
     97      1.1     pooka static unsigned dzmctl(struct dz_softc *sc, int line,
     98      1.1     pooka                        int bits, /* one of the TIOCM_xx */
     99      1.1     pooka                        int how); /* one of the DMSET/BIS.. */
    100      1.1     pooka 
    101      1.1     pooka #include <dev/dec/dzkbdvar.h>
    102      1.1     pooka #endif
    103      1.1     pooka 
    104      1.1     pooka dev_type_open(dzopen);
    105      1.1     pooka dev_type_close(dzclose);
    106      1.1     pooka dev_type_read(dzread);
    107      1.1     pooka dev_type_write(dzwrite);
    108      1.1     pooka dev_type_ioctl(dzioctl);
    109      1.1     pooka dev_type_stop(dzstop);
    110      1.1     pooka dev_type_tty(dztty);
    111      1.1     pooka dev_type_poll(dzpoll);
    112      1.1     pooka 
    113      1.1     pooka const struct cdevsw dz_cdevsw = {
    114      1.7  dholland 	.d_open = dzopen,
    115      1.7  dholland 	.d_close = dzclose,
    116      1.7  dholland 	.d_read = dzread,
    117      1.7  dholland 	.d_write = dzwrite,
    118      1.7  dholland 	.d_ioctl = dzioctl,
    119      1.7  dholland 	.d_stop = dzstop,
    120      1.7  dholland 	.d_tty = dztty,
    121      1.7  dholland 	.d_poll = dzpoll,
    122      1.7  dholland 	.d_mmap = nommap,
    123      1.7  dholland 	.d_kqfilter = ttykqfilter,
    124      1.8  dholland 	.d_discard = nodiscard,
    125      1.7  dholland 	.d_flag = D_TTY
    126      1.1     pooka };
    127      1.1     pooka 
    128      1.1     pooka int
    129      1.1     pooka dzopen(dev_t dev, int flag, int mode, struct lwp *l)
    130      1.1     pooka {
    131      1.1     pooka 	struct tty *tp;
    132      1.1     pooka 	int unit, line;
    133      1.3   tsutsui 	struct dz_softc *sc;
    134      1.1     pooka 	int s, error = 0;
    135      1.1     pooka 
    136      1.1     pooka 	unit = DZ_I2C(minor(dev));
    137      1.4   tsutsui 	sc = device_lookup_private(&dz_cd, unit);
    138      1.4   tsutsui 	if (sc == NULL)
    139      1.4   tsutsui 		return ENXIO;
    140      1.4   tsutsui 
    141      1.1     pooka 	line = DZ_PORT(minor(dev));
    142      1.5   tsutsui 	if (line > 0) /* FIXME for more than one line */
    143      1.1     pooka 		return ENXIO;
    144      1.1     pooka 
    145      1.1     pooka 	tp = sc->sc_dz.dz_tty;
    146      1.1     pooka 	if (tp == NULL)
    147      1.3   tsutsui 		return ENODEV;
    148      1.3   tsutsui 	tp->t_oproc = dzstart;
    149      1.3   tsutsui 	tp->t_param = dzparam;
    150      1.3   tsutsui 	tp->t_dev   = dev;
    151      1.1     pooka 
    152      1.1     pooka 	if (kauth_authorize_device_tty(l->l_cred, KAUTH_DEVICE_TTY_OPEN, tp))
    153      1.1     pooka 		return (EBUSY);
    154      1.1     pooka 
    155      1.1     pooka 	if ((tp->t_state & TS_ISOPEN) == 0) {
    156      1.1     pooka 		ttychars(tp);
    157      1.1     pooka 		if (tp->t_ispeed == 0) {
    158      1.1     pooka 			tp->t_iflag = TTYDEF_IFLAG;
    159      1.1     pooka 			tp->t_oflag = TTYDEF_OFLAG;
    160      1.1     pooka 			tp->t_cflag = TTYDEF_CFLAG;
    161      1.1     pooka 			tp->t_lflag = TTYDEF_LFLAG;
    162      1.1     pooka 			tp->t_ispeed = tp->t_ospeed = TTYDEF_SPEED;
    163      1.1     pooka 		}
    164      1.3   tsutsui 		(void)dzparam(tp, &tp->t_termios);
    165      1.1     pooka 		ttsetwater(tp);
    166      1.1     pooka 	}
    167      1.3   tsutsui 	/* we have no modem control but..*/
    168      1.1     pooka 	if (dzmctl(sc, line, TIOCM_DTR, DMBIS) & TIOCM_CD)
    169      1.3   tsutsui 		tp->t_state |= TS_CARR_ON;
    170      1.9       mrg 	s = spltty();
    171      1.9       mrg 	while (!(flag & O_NONBLOCK) && !(tp->t_cflag & CLOCAL) &&
    172      1.9       mrg 	    !(tp->t_state & TS_CARR_ON)) {
    173      1.9       mrg 		tp->t_wopen++;
    174      1.9       mrg 		error = ttysleep(tp, &tp->t_rawcv, true, 0);
    175      1.9       mrg 		tp->t_wopen--;
    176      1.9       mrg 		if (error)
    177      1.9       mrg 			break;
    178      1.9       mrg 	}
    179      1.3   tsutsui 	(void)splx(s);
    180      1.1     pooka 	if (error)
    181      1.3   tsutsui 		return error;
    182      1.3   tsutsui 	return (*tp->t_linesw->l_open)(dev, tp);
    183      1.1     pooka }
    184      1.3   tsutsui 
    185      1.1     pooka int
    186      1.1     pooka dzclose(dev_t dev, int flag, int mode, struct lwp *l)
    187      1.1     pooka {
    188      1.3   tsutsui 	struct dz_softc *sc;
    189      1.1     pooka 	struct tty *tp;
    190      1.1     pooka 	int unit, line;
    191      1.1     pooka 
    192      1.1     pooka 	unit = DZ_I2C(minor(dev));
    193      1.4   tsutsui 	sc = device_lookup_private(&dz_cd, unit);
    194      1.1     pooka 	line = DZ_PORT(minor(dev));
    195      1.1     pooka 
    196      1.1     pooka 	tp = sc->sc_dz.dz_tty;
    197      1.1     pooka 
    198      1.1     pooka 	(*tp->t_linesw->l_close)(tp, flag);
    199      1.1     pooka 
    200      1.1     pooka 	/* Make sure a BREAK state is not left enabled. */
    201      1.3   tsutsui 	(void)dzmctl(sc, line, TIOCM_BRK, DMBIC);
    202      1.1     pooka 
    203      1.1     pooka 	/* Do a hangup if so required. */
    204      1.1     pooka 	if ((tp->t_cflag & HUPCL) || tp->t_wopen || !(tp->t_state & TS_ISOPEN))
    205      1.5   tsutsui 		(void)dzmctl(sc, line, 0, DMSET);
    206      1.1     pooka 
    207      1.3   tsutsui 	return ttyclose(tp);
    208      1.1     pooka }
    209      1.3   tsutsui 
    210      1.1     pooka int
    211      1.1     pooka dzread(dev_t dev, struct uio *uio, int flag)
    212      1.1     pooka {
    213      1.1     pooka 	struct tty *tp;
    214      1.3   tsutsui 	struct dz_softc *sc;
    215      1.1     pooka 
    216      1.4   tsutsui 	sc = device_lookup_private(&dz_cd, DZ_I2C(minor(dev)));
    217      1.1     pooka 
    218      1.1     pooka 	tp = sc->sc_dz.dz_tty;
    219      1.3   tsutsui 	return (*tp->t_linesw->l_read)(tp, uio, flag);
    220      1.1     pooka }
    221      1.1     pooka 
    222      1.1     pooka int
    223      1.1     pooka dzwrite(dev_t dev, struct uio *uio, int flag)
    224      1.1     pooka {
    225      1.1     pooka 	struct tty *tp;
    226      1.3   tsutsui 	struct dz_softc *sc;
    227      1.1     pooka 
    228      1.4   tsutsui 	sc = device_lookup_private(&dz_cd, DZ_I2C(minor(dev)));
    229      1.1     pooka 
    230      1.1     pooka 	tp = sc->sc_dz.dz_tty;
    231      1.3   tsutsui 	return (*tp->t_linesw->l_write)(tp, uio, flag);
    232      1.1     pooka }
    233      1.1     pooka 
    234      1.1     pooka /*ARGSUSED*/
    235      1.1     pooka int
    236      1.1     pooka dzioctl(dev_t dev, u_long cmd, void *data, int flag, struct lwp *l)
    237      1.1     pooka {
    238      1.1     pooka 	struct	dz_softc *sc;
    239      1.1     pooka 	struct tty *tp;
    240      1.1     pooka 	int unit, line;
    241      1.1     pooka 	int error;
    242      1.1     pooka 
    243      1.1     pooka 	unit = DZ_I2C(minor(dev));
    244      1.1     pooka 	line = 0;
    245      1.4   tsutsui 	sc = device_lookup_private(&dz_cd, unit);
    246      1.1     pooka 	tp = sc->sc_dz.dz_tty;
    247      1.1     pooka 
    248      1.1     pooka 	error = (*tp->t_linesw->l_ioctl)(tp, cmd, data, flag, l);
    249      1.1     pooka 	if (error >= 0)
    250      1.3   tsutsui 		return error;
    251      1.1     pooka 
    252      1.1     pooka 	error = ttioctl(tp, cmd, data, flag, l);
    253      1.1     pooka 	if (error >= 0)
    254      1.3   tsutsui 		return error;
    255      1.1     pooka 
    256      1.1     pooka 	switch (cmd) {
    257      1.1     pooka 
    258      1.1     pooka 	case TIOCSBRK:
    259      1.3   tsutsui 		(void)dzmctl(sc, line, TIOCM_BRK, DMBIS);
    260      1.1     pooka 		break;
    261      1.1     pooka 
    262      1.1     pooka 	case TIOCCBRK:
    263      1.3   tsutsui 		(void)dzmctl(sc, line, TIOCM_BRK, DMBIC);
    264      1.1     pooka 		break;
    265      1.1     pooka 
    266      1.1     pooka 	case TIOCSDTR:
    267      1.3   tsutsui 		(void)dzmctl(sc, line, TIOCM_DTR, DMBIS);
    268      1.1     pooka 		break;
    269      1.1     pooka 
    270      1.1     pooka 	case TIOCCDTR:
    271      1.3   tsutsui 		(void)dzmctl(sc, line, TIOCM_DTR, DMBIC);
    272      1.1     pooka 		break;
    273      1.1     pooka 
    274      1.1     pooka 	case TIOCMSET:
    275      1.3   tsutsui 		(void)dzmctl(sc, line, *(int *)data, DMSET);
    276      1.1     pooka 		break;
    277      1.1     pooka 
    278      1.1     pooka 	case TIOCMBIS:
    279      1.3   tsutsui 		(void)dzmctl(sc, line, *(int *)data, DMBIS);
    280      1.1     pooka 		break;
    281      1.1     pooka 
    282      1.1     pooka 	case TIOCMBIC:
    283      1.3   tsutsui 		(void)dzmctl(sc, line, *(int *)data, DMBIC);
    284      1.1     pooka 		break;
    285      1.1     pooka 
    286      1.1     pooka 	case TIOCMGET:
    287      1.3   tsutsui 		*(int *)data = dzmctl(sc, line, 0, DMGET) & ~TIOCM_BRK;
    288      1.1     pooka 		break;
    289      1.1     pooka 
    290      1.1     pooka 	default:
    291      1.3   tsutsui 		return EPASSTHROUGH;
    292      1.1     pooka 	}
    293      1.3   tsutsui 	return 0;
    294      1.1     pooka }
    295      1.1     pooka 
    296      1.1     pooka /*ARGSUSED*/
    297      1.1     pooka void
    298      1.1     pooka dzstop(struct tty *tp, int flag)
    299      1.1     pooka {
    300      1.3   tsutsui 
    301      1.1     pooka 	if (tp->t_state & TS_BUSY)
    302      1.1     pooka 		if (!(tp->t_state & TS_TTSTOP))
    303      1.1     pooka 			tp->t_state |= TS_FLUSH;
    304      1.1     pooka }
    305      1.1     pooka 
    306      1.1     pooka struct tty *
    307      1.1     pooka dztty(dev_t dev)
    308      1.1     pooka {
    309      1.4   tsutsui 	struct dz_softc *sc;
    310      1.4   tsutsui 	struct tty *tp;
    311      1.4   tsutsui 
    312      1.4   tsutsui 	sc = device_lookup_private(&dz_cd, DZ_I2C(minor(dev)));
    313      1.4   tsutsui 	tp = sc->sc_dz.dz_tty;
    314      1.1     pooka 
    315      1.3   tsutsui 	return tp;
    316      1.1     pooka }
    317      1.1     pooka 
    318      1.1     pooka int
    319      1.3   tsutsui dzpoll(dev_t dev, int events, struct lwp *l)
    320      1.1     pooka {
    321      1.3   tsutsui 	struct dz_softc *sc;
    322      1.1     pooka 	struct tty *tp;
    323      1.1     pooka 
    324      1.4   tsutsui 	sc = device_lookup_private(&dz_cd, DZ_I2C(minor(dev)));
    325      1.1     pooka 
    326      1.1     pooka 	tp = sc->sc_dz.dz_tty;
    327      1.3   tsutsui 	return (*tp->t_linesw->l_poll)(tp, events, l);
    328      1.1     pooka }
    329      1.1     pooka 
    330      1.1     pooka void
    331      1.1     pooka dzstart(struct tty *tp)
    332      1.1     pooka {
    333      1.1     pooka 	struct dz_softc *sc;
    334      1.1     pooka 	struct clist *cl;
    335      1.1     pooka 	int unit, s;
    336      1.1     pooka 
    337      1.1     pooka 	unit = DZ_I2C(minor(tp->t_dev));
    338      1.4   tsutsui 	sc = device_lookup_private(&dz_cd, unit);
    339      1.1     pooka 
    340      1.1     pooka 	s = spltty();
    341      1.1     pooka 	if (tp->t_state & (TS_TIMEOUT|TS_BUSY|TS_TTSTOP)) {
    342      1.1     pooka 		splx(s);
    343      1.1     pooka 		return;
    344      1.1     pooka 	}
    345      1.1     pooka 	cl = &tp->t_outq;
    346      1.1     pooka 	ttypull(tp);
    347      1.1     pooka 	if (cl->c_cc == 0) {
    348      1.1     pooka 		splx(s);
    349      1.1     pooka 		return;
    350      1.1     pooka 	}
    351      1.1     pooka 
    352      1.1     pooka 	tp->t_state |= TS_BUSY;
    353      1.1     pooka 
    354      1.3   tsutsui 	/* was idle, get it started */
    355      1.1     pooka 	dzxint(sc,USI_TXRDY);
    356      1.1     pooka 	splx(s);
    357      1.1     pooka }
    358      1.1     pooka 
    359      1.1     pooka static int rclk = 25000000; /* BUGBUGBUGBUG */
    360      1.1     pooka 
    361      1.1     pooka static int
    362      1.1     pooka dzdivisor(int baudrate)
    363      1.1     pooka {
    364      1.1     pooka 	int act_baud, divisor, error;
    365      1.1     pooka 
    366      1.1     pooka 	if (baudrate <= 0)
    367      1.3   tsutsui 		return 0;
    368      1.1     pooka 
    369      1.3   tsutsui 	divisor = (rclk / 8) / (baudrate);
    370      1.3   tsutsui 	divisor = (divisor / 2) + (divisor & 1);
    371      1.1     pooka 
    372      1.1     pooka 	if (divisor <= 0)
    373      1.3   tsutsui 		return -1;
    374      1.1     pooka 	act_baud = rclk / (divisor * 16);
    375      1.1     pooka 
    376      1.1     pooka 	/* 10 times error in percent: */
    377      1.1     pooka 	error = ((act_baud - baudrate) * 2000 / baudrate + 1) >> 1;
    378      1.1     pooka 
    379      1.1     pooka 	/* 3.0% maximum error tolerance: */
    380      1.1     pooka 	if (error < -30 || error > 30)
    381      1.3   tsutsui 		return -1;
    382      1.1     pooka 
    383      1.3   tsutsui 	return divisor;
    384      1.1     pooka }
    385      1.1     pooka 
    386      1.1     pooka static int
    387      1.1     pooka dzparam(struct tty *tp, struct termios *t)
    388      1.1     pooka {
    389      1.1     pooka 	struct	dz_softc *sc;
    390      1.1     pooka 	int cflag = t->c_cflag;
    391      1.1     pooka 	int unit, line;
    392      1.1     pooka 	int speed;
    393      1.1     pooka 	unsigned lpr;
    394      1.1     pooka 	int s;
    395      1.1     pooka 	struct _Usart *dzr;
    396      1.1     pooka 
    397      1.1     pooka 	unit = DZ_I2C(minor(tp->t_dev));
    398      1.1     pooka 	line = DZ_PORT(minor(tp->t_dev));
    399      1.4   tsutsui 	sc = device_lookup_private(&dz_cd, unit);
    400      1.1     pooka 
    401      1.1     pooka 	/* check requested parameters */
    402      1.3   tsutsui 	if (t->c_ispeed != t->c_ospeed)
    403      1.3   tsutsui 		return EINVAL;
    404      1.3   tsutsui 	speed = dzdivisor(t->c_ispeed);
    405      1.3   tsutsui 	if (speed < 0)
    406      1.3   tsutsui 		return EINVAL;
    407      1.3   tsutsui 
    408      1.3   tsutsui 	tp->t_ispeed = t->c_ispeed;
    409      1.3   tsutsui 	tp->t_ospeed = t->c_ospeed;
    410      1.3   tsutsui 	tp->t_cflag = cflag;
    411      1.3   tsutsui 
    412      1.3   tsutsui 	{
    413      1.3   tsutsui 		/* XXX */
    414      1.3   tsutsui 		static int didit = 0;
    415      1.3   tsutsui 		if (!didit && t->c_ispeed != 38400)
    416      1.3   tsutsui 			printf("dzparam: c_ispeed %d ignored, keeping 38400\n",
    417      1.3   tsutsui 			    t->c_ispeed);
    418      1.3   tsutsui 		didit = 1;
    419      1.3   tsutsui 	}
    420      1.3   tsutsui 	speed = dzdivisor(38400);
    421      1.1     pooka 
    422      1.1     pooka 	if (speed == 0) {
    423      1.3   tsutsui 		(void)dzmctl(sc, line, 0, DMSET);	/* hang up line */
    424      1.3   tsutsui 		return 0;
    425      1.1     pooka 	}
    426      1.1     pooka 
    427      1.3   tsutsui 	switch (cflag & CSIZE) {
    428      1.3   tsutsui 	case CS5:
    429      1.1     pooka 		lpr = USC_BPC_5;
    430      1.1     pooka 		break;
    431      1.3   tsutsui 	case CS6:
    432      1.1     pooka 		lpr = USC_BPC_6;
    433      1.1     pooka 		break;
    434      1.3   tsutsui 	case CS7:
    435      1.1     pooka 		lpr = USC_BPC_7;
    436      1.1     pooka 		break;
    437      1.3   tsutsui 	default:
    438      1.1     pooka 		lpr = USC_BPC_8;
    439      1.1     pooka 		break;
    440      1.1     pooka 	}
    441      1.1     pooka 	if (cflag & CSTOPB)
    442      1.1     pooka 		lpr |= USC_2STOP;
    443      1.1     pooka 
    444      1.1     pooka 	if (cflag & PARENB) {
    445      1.3   tsutsui 		if (cflag & PARODD)
    446      1.3   tsutsui 			lpr |= USC_ODD;
    447      1.3   tsutsui 		else
    448      1.3   tsutsui 			lpr |= USC_EVEN;
    449      1.3   tsutsui 	} else
    450      1.3   tsutsui 		lpr |= USC_NONE;
    451      1.1     pooka 
    452      1.1     pooka 	s = spltty();
    453      1.1     pooka 
    454      1.1     pooka 	dzr = sc->sc_dr;
    455      1.1     pooka 
    456      1.3   tsutsui 	dzr->Baud = speed;
    457      1.3   tsutsui 	dzr->Control = USC_CLKDIV_4 | USC_TXEN | USC_RXEN | lpr;
    458      1.1     pooka #define USI_INTRS (USI_RXRDY|USI_RXBRK|USI_OVRE|USI_FRAME|USI_PARE)
    459      1.3   tsutsui 	dzr->IntrEnable = USI_INTRS;
    460      1.1     pooka 
    461      1.3   tsutsui 	(void)splx(s);
    462      1.3   tsutsui 	return 0;
    463      1.1     pooka }
    464      1.1     pooka 
    465      1.1     pooka static unsigned
    466      1.1     pooka dzmctl(struct dz_softc *sc, int line, int bits, int how)
    467      1.1     pooka {
    468      1.3   tsutsui 	unsigned int mbits;
    469      1.1     pooka 	int s;
    470      1.1     pooka 	struct _Usart *dzr;
    471      1.1     pooka 
    472      1.1     pooka 	mbits = 0;
    473      1.1     pooka 
    474      1.1     pooka 	s = spltty();
    475      1.1     pooka 
    476      1.1     pooka 	dzr = sc->sc_dr;
    477      1.1     pooka 
    478      1.3   tsutsui 	/* we have no modem control bits (CD,RI,DTR,DSR,..) */
    479      1.3   tsutsui 	mbits |= TIOCM_CD;
    480      1.3   tsutsui 	mbits |= TIOCM_DTR;
    481      1.1     pooka 
    482      1.1     pooka 	if (dzr->ChannelStatus & USI_RXBRK)
    483      1.1     pooka 		mbits |= TIOCM_BRK;
    484      1.1     pooka 
    485      1.3   tsutsui 	switch (how) {
    486      1.3   tsutsui 	case DMSET:
    487      1.1     pooka 		mbits = bits;
    488      1.1     pooka 		break;
    489      1.1     pooka 
    490      1.3   tsutsui 	case DMBIS:
    491      1.1     pooka 		mbits |= bits;
    492      1.1     pooka 		break;
    493      1.1     pooka 
    494      1.3   tsutsui 	case DMBIC:
    495      1.1     pooka 		mbits &= ~bits;
    496      1.1     pooka 		break;
    497      1.1     pooka 
    498      1.3   tsutsui 	case DMGET:
    499      1.3   tsutsui 		(void)splx(s);
    500      1.3   tsutsui 		return mbits;
    501      1.1     pooka 	}
    502      1.1     pooka 
    503      1.3   tsutsui 	/* BUGBUG work in progress */
    504      1.1     pooka 	if (mbits & TIOCM_BRK) {
    505      1.1     pooka 		sc->sc_brk |= (1 << line);
    506      1.3   tsutsui 		dzr->Control |= USC_STTBRK;
    507      1.1     pooka 	} else {
    508      1.1     pooka 		sc->sc_brk &= ~(1 << line);
    509      1.3   tsutsui 		dzr->Control |= USC_STPBRK;
    510      1.1     pooka 	}
    511      1.1     pooka 
    512      1.3   tsutsui 	(void)splx(s);
    513      1.3   tsutsui 	return mbits;
    514      1.1     pooka }
    515      1.1     pooka 
    516      1.1     pooka 
    517      1.1     pooka #if defined(DDB)
    518      1.1     pooka int dz_ddb = 0;
    519      1.1     pooka #endif
    520      1.1     pooka 
    521      1.1     pooka /* Receiver Interrupt */
    522      1.1     pooka 
    523      1.1     pooka void
    524      1.1     pooka dzrint(struct dz_softc *sc, uint32_t csr)
    525      1.1     pooka {
    526      1.1     pooka 	struct tty *tp;
    527      1.6  christos 	int cc;
    528      1.1     pooka 	struct _Usart *dzr;
    529      1.1     pooka 
    530      1.1     pooka 	sc->sc_rxint++;
    531      1.1     pooka 	dzr = sc->sc_dr;
    532      1.1     pooka 
    533      1.3   tsutsui 	cc = dzr->RxData;
    534      1.3   tsutsui 	tp = sc->sc_dz.dz_tty;
    535      1.3   tsutsui 
    536      1.3   tsutsui 	/* clear errors before we print or bail out */
    537      1.3   tsutsui 	if (csr & (USI_OVRE|USI_FRAME|USI_PARE))
    538      1.3   tsutsui 		dzr->Control = USC_RSTSTA;
    539      1.3   tsutsui 
    540      1.3   tsutsui 	if (!(tp->t_state & TS_ISOPEN)) {
    541      1.3   tsutsui 		wakeup(&tp->t_rawq);
    542      1.3   tsutsui 		return;
    543      1.3   tsutsui 	}
    544      1.3   tsutsui 
    545      1.3   tsutsui 	if (csr & USI_OVRE) {
    546      1.3   tsutsui 		log(LOG_WARNING, "%s: silo overflow, line %d\n",
    547      1.4   tsutsui 		    device_xname(sc->sc_dev), 0);
    548      1.3   tsutsui 	}
    549      1.1     pooka 
    550      1.3   tsutsui 	if (csr & USI_FRAME)
    551      1.3   tsutsui 		cc |= TTY_FE;
    552      1.3   tsutsui 	if (csr & USI_PARE)
    553      1.3   tsutsui 		cc |= TTY_PE;
    554      1.1     pooka 
    555      1.1     pooka #if defined(DDB)
    556      1.3   tsutsui 	/* ^P drops into DDB */
    557      1.3   tsutsui 	if (dz_ddb && (cc == 0x10))
    558      1.3   tsutsui 		Debugger();
    559      1.1     pooka #endif
    560      1.3   tsutsui 	(*tp->t_linesw->l_rint)(cc, tp);
    561      1.1     pooka }
    562      1.1     pooka 
    563      1.1     pooka /* Transmitter Interrupt */
    564      1.1     pooka 
    565      1.1     pooka void
    566      1.1     pooka dzxint(struct dz_softc *sc, uint32_t csr)
    567      1.1     pooka {
    568      1.1     pooka 	struct tty *tp;
    569      1.1     pooka 	struct clist *cl;
    570      1.1     pooka 	int ch;
    571      1.1     pooka 	struct _Usart *dzr;
    572      1.1     pooka 
    573      1.1     pooka 	dzr = sc->sc_dr;
    574      1.1     pooka 
    575      1.3   tsutsui 	tp = sc->sc_dz.dz_tty;
    576      1.3   tsutsui 	cl = &tp->t_outq;
    577      1.3   tsutsui 	tp->t_state &= ~TS_BUSY;
    578      1.3   tsutsui 
    579      1.3   tsutsui 	/* Just send out a char if we have one */
    580      1.3   tsutsui 	if (cl->c_cc) {
    581      1.3   tsutsui 		tp->t_state |= TS_BUSY;
    582      1.3   tsutsui 		ch = getc(cl);
    583      1.3   tsutsui 		dzr->TxData = ch;
    584      1.3   tsutsui 		dzr->IntrEnable = USI_TXRDY;
    585      1.3   tsutsui 		return;
    586      1.3   tsutsui 	}
    587      1.3   tsutsui 
    588      1.3   tsutsui 	/* Nothing to send; turn off intr */
    589      1.3   tsutsui 	dzr->IntrDisable = USI_TXRDY;
    590      1.3   tsutsui 
    591      1.3   tsutsui 	if (tp->t_state & TS_FLUSH)
    592      1.3   tsutsui 		tp->t_state &= ~TS_FLUSH;
    593      1.3   tsutsui 	else
    594      1.3   tsutsui 		ndflush(&tp->t_outq, cl->c_cc);
    595      1.3   tsutsui 
    596      1.3   tsutsui 	(*tp->t_linesw->l_start)(tp);
    597      1.3   tsutsui }
    598      1.3   tsutsui 
    599      1.3   tsutsui /*
    600      1.3   tsutsui  * Machdep part of the driver
    601      1.3   tsutsui  */
    602      1.3   tsutsui int	dz_ebus_match(device_t, cfdata_t, void *);
    603      1.3   tsutsui void	dz_ebus_attach(device_t, device_t, void *);
    604      1.1     pooka int	dz_ebus_intr(void *, void *);
    605      1.1     pooka 
    606      1.1     pooka void	dz_ebus_cnsetup(paddr_t);
    607      1.3   tsutsui void	dz_ebus_cninit(struct consdev *);
    608      1.1     pooka int	dz_ebus_cngetc(dev_t);
    609      1.1     pooka void	dz_ebus_cnputc(dev_t, int);
    610      1.1     pooka void	dz_ebus_cnpollc(dev_t, int);
    611      1.1     pooka 
    612      1.1     pooka static int	dz_ebus_getmajor(void);
    613      1.1     pooka 
    614      1.4   tsutsui CFATTACH_DECL_NEW(dz_ebus, sizeof(struct dz_softc),
    615      1.1     pooka     dz_ebus_match, dz_ebus_attach, NULL, NULL);
    616      1.1     pooka 
    617      1.1     pooka struct consdev dz_ebus_consdev = {
    618      1.1     pooka 	NULL, dz_ebus_cninit, dz_ebus_cngetc, dz_ebus_cnputc,
    619      1.1     pooka 	dz_ebus_cnpollc, NULL, NULL, NULL, NODEV, CN_NORMAL,
    620      1.1     pooka };
    621      1.1     pooka 
    622      1.3   tsutsui /*
    623      1.3   tsutsui  * Points to the console regs. Special mapping until VM is turned on.
    624      1.1     pooka  */
    625      1.1     pooka struct _Usart *dzcn;
    626      1.1     pooka 
    627      1.1     pooka int
    628      1.3   tsutsui dz_ebus_match(device_t parent, cfdata_t cf, void *aux)
    629      1.1     pooka {
    630      1.1     pooka 	struct ebus_attach_args *iba;
    631      1.3   tsutsui 	struct _Usart *us;
    632      1.1     pooka 
    633      1.1     pooka 	iba = aux;
    634      1.1     pooka 
    635      1.1     pooka 	if (strcmp(iba->ia_name, "dz") != 0)
    636      1.3   tsutsui 		return 0;
    637      1.1     pooka 
    638      1.3   tsutsui 	us = (struct _Usart *)iba->ia_vaddr;
    639      1.3   tsutsui 	if ((us == NULL) ||
    640      1.3   tsutsui 	    (us->Tag != PMTTAG_USART))
    641      1.3   tsutsui 		return 0;
    642      1.1     pooka 
    643      1.3   tsutsui 	return 1;
    644      1.1     pooka }
    645      1.1     pooka 
    646      1.1     pooka void
    647      1.3   tsutsui dz_ebus_attach(device_t parent, device_t self, void *aux)
    648      1.1     pooka {
    649      1.1     pooka 	struct ebus_attach_args *iba;
    650      1.1     pooka 	struct dz_softc *sc;
    651      1.1     pooka 
    652      1.4   tsutsui 	sc = device_private(self);
    653      1.1     pooka 	iba = aux;
    654      1.1     pooka 
    655      1.4   tsutsui 	sc->sc_dev = self;
    656      1.1     pooka 	sc->sc_dr = (struct _Usart *)iba->ia_vaddr;
    657      1.1     pooka #if DEBUG
    658      1.3   tsutsui 	printf(" virt=%p ", (void *)sc->sc_dr);
    659      1.1     pooka #endif
    660      1.1     pooka 
    661      1.1     pooka 	printf(": neilsart 1 line");
    662      1.1     pooka 	ebus_intr_establish(parent, (void *)iba->ia_cookie, IPL_TTY,
    663      1.1     pooka 	    dz_ebus_intr, sc);
    664      1.1     pooka 
    665      1.1     pooka 	sc->sc_rxint = sc->sc_brk = 0;
    666      1.1     pooka 	sc->sc_consline = 0;
    667      1.1     pooka 
    668      1.1     pooka 	/* Initialize our softc structure. Should be done in open? */
    669      1.1     pooka 
    670      1.2     rmind 	sc->sc_dz.dz_sc = sc;
    671      1.2     rmind 	sc->sc_dz.dz_line = 0;
    672      1.2     rmind 	sc->sc_dz.dz_tty = tty_alloc();
    673      1.1     pooka 
    674      1.1     pooka 	evcnt_attach_dynamic(&sc->sc_rintrcnt, EVCNT_TYPE_INTR, NULL,
    675      1.4   tsutsui 	    device_xname(self), "rintr");
    676      1.1     pooka 	evcnt_attach_dynamic(&sc->sc_tintrcnt, EVCNT_TYPE_INTR, NULL,
    677      1.4   tsutsui 	    device_xname(self), "tintr");
    678      1.1     pooka 
    679      1.3   tsutsui 	/* Initialize hw regs */
    680      1.1     pooka #if 0
    681      1.1     pooka 	DZ_WRITE_WORD(dr_csr, DZ_CSR_MSE | DZ_CSR_RXIE | DZ_CSR_TXIE);
    682      1.1     pooka 	DZ_WRITE_BYTE(dr_dtr, 0);
    683      1.1     pooka 	DZ_WRITE_BYTE(dr_break, 0);
    684      1.1     pooka #endif
    685      1.1     pooka 
    686      1.3   tsutsui 	/* Switch the console to virtual mode */
    687      1.3   tsutsui 	dzcn = sc->sc_dr;
    688      1.3   tsutsui 	/* And test it */
    689      1.1     pooka 	printf("\n");
    690      1.1     pooka }
    691      1.1     pooka 
    692      1.1     pooka static int
    693      1.1     pooka dz_ebus_getmajor(void)
    694      1.1     pooka {
    695      1.1     pooka 	extern const struct cdevsw dz_cdevsw;
    696      1.1     pooka 	static int cache = -1;
    697      1.1     pooka 
    698      1.1     pooka 	if (cache != -1)
    699      1.3   tsutsui 		return cache;
    700      1.1     pooka 
    701      1.3   tsutsui 	return cache = cdevsw_lookup_major(&dz_cdevsw);
    702      1.1     pooka }
    703      1.1     pooka 
    704      1.1     pooka int
    705      1.1     pooka dz_ebus_intr(void *cookie, void *f)
    706      1.1     pooka {
    707      1.1     pooka 	struct dz_softc *sc;
    708      1.1     pooka 	struct _Usart *dzr;
    709      1.1     pooka 	uint32_t csr;
    710      1.1     pooka 
    711      1.1     pooka 	sc = cookie;
    712      1.1     pooka 	dzr = sc->sc_dr;
    713      1.1     pooka 
    714      1.1     pooka #define USI_INTERRUPTS (USI_INTRS|USI_TXRDY)
    715      1.1     pooka 
    716      1.3   tsutsui 	for (; ((csr = (dzr->ChannelStatus & dzr->IntrMask)) &
    717      1.3   tsutsui 	    USI_INTERRUPTS) != 0;) {
    718      1.1     pooka 		if ((csr & USI_INTRS) != 0)
    719      1.1     pooka 			dzrint(sc, csr);
    720      1.1     pooka 		if ((csr & USI_TXRDY) != 0)
    721      1.1     pooka 			dzxint(sc, csr);
    722      1.1     pooka 	}
    723      1.1     pooka 
    724      1.3   tsutsui 	return 0;
    725      1.1     pooka }
    726      1.1     pooka 
    727      1.1     pooka void
    728      1.1     pooka dz_ebus_cnsetup(paddr_t addr)
    729      1.1     pooka {
    730      1.1     pooka 
    731      1.1     pooka 	dzcn = (struct _Usart *)addr;
    732      1.1     pooka 
    733      1.1     pooka #if 0
    734      1.3   tsutsui 	/*
    735      1.3   tsutsui 	 * Initialize enough to xmit/recv via polling.
    736      1.3   tsutsui 	 * Bootloader might or might not have done it.
    737      1.3   tsutsui 	 */
    738      1.3   tsutsui 	dzcn->Control =
    739      1.3   tsutsui 	    USC_RXEN |
    740      1.3   tsutsui 	    USC_TXEN |
    741      1.3   tsutsui 	    USC_BPC_8 |
    742      1.3   tsutsui 	    USC_NONE |
    743      1.3   tsutsui 	    USC_1STOP |
    744      1.3   tsutsui 	    USC_CLKDIV_4;
    745      1.3   tsutsui 	dzcn->Baud = 0x29; /* 38400 */
    746      1.1     pooka #endif
    747      1.1     pooka 
    748      1.1     pooka 	/*
    749      1.1     pooka 	 * Point the console at us
    750      1.1     pooka 	 */
    751      1.1     pooka 	cn_tab = &dz_ebus_consdev;
    752      1.1     pooka 	cn_tab->cn_pri = CN_NORMAL;/*CN_REMOTE?*/
    753      1.1     pooka 	cn_tab->cn_dev = makedev(dz_ebus_getmajor(), 0);
    754      1.1     pooka }
    755      1.1     pooka 
    756      1.3   tsutsui void
    757      1.3   tsutsui dz_ebus_cninit(struct consdev *cn)
    758      1.1     pooka {
    759      1.1     pooka }
    760      1.1     pooka 
    761      1.1     pooka int
    762      1.1     pooka dz_ebus_cngetc(dev_t dev)
    763      1.1     pooka {
    764      1.1     pooka 	int c, s;
    765      1.1     pooka 
    766      1.1     pooka 	c = 0;
    767      1.1     pooka 	s = spltty();
    768      1.1     pooka 
    769      1.3   tsutsui 	while ((dzcn->ChannelStatus & USI_RXRDY) == 0)
    770      1.3   tsutsui 		DELAY(10);
    771      1.3   tsutsui 	c = dzcn->RxData;
    772      1.1     pooka 
    773      1.1     pooka 	splx(s);
    774      1.1     pooka 	if (c == 13) /* map cr->ln */
    775      1.1     pooka 		c = 10;
    776      1.3   tsutsui 	return c;
    777      1.1     pooka }
    778      1.1     pooka 
    779      1.1     pooka int dzflipped = 0;
    780      1.1     pooka void
    781      1.1     pooka dz_ebus_cnputc(dev_t dev, int ch)
    782      1.1     pooka {
    783      1.1     pooka 	int timeout, s;
    784      1.1     pooka 
    785      1.1     pooka 	/* Don't hang the machine! */
    786      1.1     pooka 	timeout = 1 << 15;
    787      1.1     pooka 
    788      1.1     pooka 	s = spltty();
    789      1.1     pooka 
    790      1.1     pooka #if 1
    791      1.3   tsutsui 	/* Keep wired to hunt for a bug */
    792      1.3   tsutsui 	if (dzcn && (dzcn != (struct _Usart *)0xfff90000)) {
    793      1.3   tsutsui 		dzcn = (struct _Usart *)0xfff90000;
    794      1.3   tsutsui 		dzflipped++;
    795      1.3   tsutsui 	}
    796      1.1     pooka #endif
    797      1.1     pooka 
    798      1.1     pooka 	/* Wait until ready */
    799      1.1     pooka 	while ((dzcn->ChannelStatus & USI_TXRDY) == 0)
    800      1.1     pooka 		if (--timeout < 0)
    801      1.1     pooka 			break;
    802      1.1     pooka 
    803      1.1     pooka 	/* Put the character */
    804      1.1     pooka 	dzcn->TxData = ch;
    805      1.1     pooka 
    806      1.1     pooka 	splx(s);
    807      1.1     pooka }
    808      1.1     pooka 
    809      1.3   tsutsui /*
    810      1.3   tsutsui  * Called before/after going into poll mode
    811      1.1     pooka  */
    812      1.3   tsutsui void
    813      1.1     pooka dz_ebus_cnpollc(dev_t dev, int on)
    814      1.1     pooka {
    815      1.1     pooka }
    816