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zs.c revision 1.14.24.2
      1  1.14.24.2       mjf /*	$NetBSD: zs.c,v 1.14.24.2 2007/12/08 18:17:59 mjf Exp $	*/
      2        1.1  fredette 
      3        1.1  fredette /*-
      4        1.1  fredette  * Copyright (c) 1996 The NetBSD Foundation, Inc.
      5        1.1  fredette  * All rights reserved.
      6        1.1  fredette  *
      7        1.1  fredette  * This code is derived from software contributed to The NetBSD Foundation
      8        1.1  fredette  * by Gordon W. Ross.
      9        1.1  fredette  *
     10        1.1  fredette  * Redistribution and use in source and binary forms, with or without
     11        1.1  fredette  * modification, are permitted provided that the following conditions
     12        1.1  fredette  * are met:
     13        1.1  fredette  * 1. Redistributions of source code must retain the above copyright
     14        1.1  fredette  *    notice, this list of conditions and the following disclaimer.
     15        1.1  fredette  * 2. Redistributions in binary form must reproduce the above copyright
     16        1.1  fredette  *    notice, this list of conditions and the following disclaimer in the
     17        1.1  fredette  *    documentation and/or other materials provided with the distribution.
     18        1.1  fredette  * 3. All advertising materials mentioning features or use of this software
     19        1.1  fredette  *    must display the following acknowledgement:
     20        1.1  fredette  *        This product includes software developed by the NetBSD
     21        1.1  fredette  *        Foundation, Inc. and its contributors.
     22        1.1  fredette  * 4. Neither the name of The NetBSD Foundation nor the names of its
     23        1.1  fredette  *    contributors may be used to endorse or promote products derived
     24        1.1  fredette  *    from this software without specific prior written permission.
     25        1.1  fredette  *
     26        1.1  fredette  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     27        1.1  fredette  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     28        1.1  fredette  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     29        1.1  fredette  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     30        1.1  fredette  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     31        1.1  fredette  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     32        1.1  fredette  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     33        1.1  fredette  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     34        1.1  fredette  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     35        1.1  fredette  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     36        1.1  fredette  * POSSIBILITY OF SUCH DAMAGE.
     37        1.1  fredette  */
     38        1.1  fredette 
     39        1.1  fredette /*
     40        1.1  fredette  * Zilog Z8530 Dual UART driver (machine-dependent part)
     41        1.1  fredette  *
     42        1.1  fredette  * Runs two serial lines per chip using slave drivers.
     43        1.1  fredette  * Plain tty/async lines use the zs_async slave.
     44        1.1  fredette  * Sun keyboard/mouse uses the zs_kbd/zs_ms slaves.
     45        1.1  fredette  */
     46        1.8     lukem 
     47        1.8     lukem #include <sys/cdefs.h>
     48  1.14.24.2       mjf __KERNEL_RCSID(0, "$NetBSD: zs.c,v 1.14.24.2 2007/12/08 18:17:59 mjf Exp $");
     49        1.1  fredette 
     50        1.1  fredette #include "opt_ddb.h"
     51        1.1  fredette #include "opt_kgdb.h"
     52        1.1  fredette 
     53        1.1  fredette #include <sys/param.h>
     54        1.1  fredette #include <sys/systm.h>
     55        1.1  fredette #include <sys/conf.h>
     56        1.1  fredette #include <sys/device.h>
     57        1.1  fredette #include <sys/file.h>
     58        1.1  fredette #include <sys/ioctl.h>
     59        1.1  fredette #include <sys/kernel.h>
     60        1.1  fredette #include <sys/proc.h>
     61        1.1  fredette #include <sys/tty.h>
     62        1.1  fredette #include <sys/time.h>
     63        1.1  fredette #include <sys/syslog.h>
     64  1.14.24.2       mjf #include <sys/intr.h>
     65        1.1  fredette 
     66        1.1  fredette #include <machine/autoconf.h>
     67        1.1  fredette #include <machine/promlib.h>
     68        1.1  fredette #include <machine/cpu.h>
     69        1.1  fredette #include <machine/eeprom.h>
     70        1.1  fredette #include <machine/psl.h>
     71        1.1  fredette #include <machine/z8530var.h>
     72        1.1  fredette 
     73        1.1  fredette #include <dev/cons.h>
     74        1.1  fredette #include <dev/ic/z8530reg.h>
     75        1.1  fredette #include <dev/sun/kbd_ms_ttyvar.h>
     76        1.1  fredette #include <ddb/db_output.h>
     77        1.1  fredette 
     78        1.1  fredette #include <sun2/dev/cons.h>
     79        1.1  fredette 
     80        1.1  fredette #include "kbd.h"	/* NKBD */
     81        1.1  fredette #include "ms.h"		/* NMS */
     82        1.1  fredette 
     83        1.1  fredette /*
     84        1.1  fredette  * Some warts needed by z8530tty.c -
     85        1.1  fredette  * The default parity REALLY needs to be the same as the PROM uses,
     86        1.1  fredette  * or you can not see messages done with printf during boot-up...
     87        1.1  fredette  */
     88        1.1  fredette int zs_def_cflag = (CREAD | CS8 | HUPCL);
     89        1.1  fredette 
     90        1.1  fredette /* ZS channel used as the console device (if any) */
     91        1.1  fredette void *zs_conschan_get, *zs_conschan_put;
     92        1.1  fredette 
     93        1.1  fredette static u_char zs_init_reg[16] = {
     94        1.1  fredette 	0,	/* 0: CMD (reset, etc.) */
     95        1.1  fredette 	0,	/* 1: No interrupts yet. */
     96        1.1  fredette #ifdef  ZS_INIT_IVECT
     97        1.1  fredette 	ZS_INIT_IVECT,	/* 2: IVECT */
     98        1.1  fredette #else
     99        1.1  fredette 	0,	/* 2: IVECT */
    100        1.1  fredette #endif
    101        1.1  fredette 	ZSWR3_RX_8 | ZSWR3_RX_ENABLE,
    102        1.1  fredette 	ZSWR4_CLK_X16 | ZSWR4_ONESB | ZSWR4_EVENP,
    103        1.1  fredette 	ZSWR5_TX_8 | ZSWR5_TX_ENABLE,
    104        1.1  fredette 	0,	/* 6: TXSYNC/SYNCLO */
    105        1.1  fredette 	0,	/* 7: RXSYNC/SYNCHI */
    106        1.1  fredette 	0,	/* 8: alias for data port */
    107        1.1  fredette #ifdef  ZS_INIT_IVECT
    108        1.1  fredette 	ZSWR9_MASTER_IE,
    109        1.1  fredette #else
    110        1.1  fredette 	ZSWR9_MASTER_IE | ZSWR9_NO_VECTOR,
    111        1.1  fredette #endif
    112        1.1  fredette 	0,	/*10: Misc. TX/RX control bits */
    113        1.1  fredette 	ZSWR11_TXCLK_BAUD | ZSWR11_RXCLK_BAUD,
    114        1.1  fredette 	((PCLK/32)/9600)-2,	/*12: BAUDLO (default=9600) */
    115        1.1  fredette 	0,			/*13: BAUDHI (default=9600) */
    116        1.1  fredette 	ZSWR14_BAUD_ENA | ZSWR14_BAUD_FROM_PCLK,
    117        1.1  fredette 	ZSWR15_BREAK_IE,
    118        1.1  fredette };
    119        1.1  fredette 
    120        1.1  fredette /* Console ops */
    121       1.10       chs static int  zscngetc(dev_t);
    122       1.10       chs static void zscnputc(dev_t, int);
    123       1.10       chs static void zscnpollc(dev_t, int);
    124        1.1  fredette 
    125        1.1  fredette struct consdev zs_consdev = {
    126        1.1  fredette 	NULL,
    127        1.1  fredette 	NULL,
    128        1.1  fredette 	zscngetc,
    129        1.1  fredette 	zscnputc,
    130        1.1  fredette 	zscnpollc,
    131        1.1  fredette 	NULL,
    132        1.1  fredette };
    133        1.1  fredette 
    134        1.1  fredette 
    135        1.1  fredette /****************************************************************
    136        1.1  fredette  * Autoconfig
    137        1.1  fredette  ****************************************************************/
    138        1.1  fredette 
    139       1.10       chs static int  zs_print(void *, const char *name);
    140        1.1  fredette 
    141        1.1  fredette extern struct cfdriver zs_cd;
    142        1.1  fredette 
    143        1.1  fredette /* Interrupt handlers. */
    144       1.10       chs int zscheckintr(void *);
    145       1.10       chs static int zshard(void *);
    146       1.10       chs static void zssoft(void *);
    147        1.1  fredette 
    148       1.10       chs static int zs_get_speed(struct zs_chanstate *);
    149        1.1  fredette 
    150        1.1  fredette /*
    151        1.1  fredette  * Attach a found zs.
    152        1.1  fredette  *
    153        1.1  fredette  * USE ROM PROPERTIES port-a-ignore-cd AND port-b-ignore-cd FOR
    154        1.1  fredette  * SOFT CARRIER, AND keyboard PROPERTY FOR KEYBOARD/MOUSE?
    155        1.1  fredette  */
    156       1.10       chs void
    157       1.10       chs zs_attach(struct zsc_softc *zsc, struct zsdevice *zsd, int pri)
    158        1.1  fredette {
    159        1.1  fredette 	struct zsc_attach_args zsc_args;
    160        1.1  fredette 	struct zs_chanstate *cs;
    161  1.14.24.2       mjf 	int s, channel;
    162        1.1  fredette 
    163        1.1  fredette 	if (zsd == NULL) {
    164        1.1  fredette 		printf("configuration incomplete\n");
    165        1.1  fredette 		return;
    166        1.1  fredette 	}
    167        1.1  fredette 
    168  1.14.24.2       mjf #if 0
    169       1.14   tsutsui 	/* we should use ipl2si(softpri) but it isn't exported */
    170       1.14   tsutsui 	printf(" softpri %d\n", _IPL_SOFT_LEVEL3);
    171  1.14.24.2       mjf #else
    172  1.14.24.2       mjf 	printf("\n");
    173  1.14.24.2       mjf #endif
    174        1.1  fredette 
    175        1.1  fredette 	/*
    176        1.1  fredette 	 * Initialize software state for each channel.
    177        1.1  fredette 	 */
    178        1.1  fredette 	for (channel = 0; channel < 2; channel++) {
    179        1.1  fredette 		struct zschan *zc;
    180        1.1  fredette 		struct device *child;
    181        1.1  fredette 
    182        1.1  fredette 		zsc_args.channel = channel;
    183        1.1  fredette 		cs = &zsc->zsc_cs_store[channel];
    184        1.1  fredette 		zsc->zsc_cs[channel] = cs;
    185        1.1  fredette 
    186  1.14.24.1       mjf 		zs_lock_init(cs);
    187        1.1  fredette 		cs->cs_channel = channel;
    188        1.1  fredette 		cs->cs_private = NULL;
    189        1.1  fredette 		cs->cs_ops = &zsops_null;
    190        1.1  fredette 		cs->cs_brg_clk = PCLK / 16;
    191        1.1  fredette 
    192        1.1  fredette 		zc = (channel == 0) ? &zsd->zs_chan_a : &zsd->zs_chan_b;
    193        1.1  fredette 
    194        1.1  fredette 		zsc_args.consdev = NULL;
    195        1.1  fredette 		zsc_args.hwflags = zs_console_flags(zsc->zsc_promunit,
    196        1.1  fredette 						    zsc->zsc_node,
    197        1.1  fredette 						    channel);
    198        1.1  fredette 
    199        1.1  fredette 		if (zsc_args.hwflags & ZS_HWFLAG_CONSOLE) {
    200        1.1  fredette 			zsc_args.hwflags |= ZS_HWFLAG_USE_CONSDEV;
    201        1.1  fredette 			zsc_args.consdev = &zs_consdev;
    202        1.1  fredette 		}
    203        1.1  fredette 
    204        1.1  fredette 		if ((zsc_args.hwflags & ZS_HWFLAG_CONSOLE_INPUT) != 0) {
    205        1.1  fredette 			zs_conschan_get = zc;
    206        1.1  fredette 		}
    207        1.1  fredette 		if ((zsc_args.hwflags & ZS_HWFLAG_CONSOLE_OUTPUT) != 0) {
    208        1.1  fredette 			zs_conschan_put = zc;
    209        1.1  fredette 		}
    210        1.1  fredette 
    211        1.1  fredette 		/* Children need to set cn_dev, etc */
    212        1.1  fredette 		cs->cs_reg_csr  = &zc->zc_csr;
    213        1.1  fredette 		cs->cs_reg_data = &zc->zc_data;
    214        1.1  fredette 
    215        1.5  fredette 		memcpy(cs->cs_creg, zs_init_reg, 16);
    216        1.5  fredette 		memcpy(cs->cs_preg, zs_init_reg, 16);
    217        1.1  fredette 
    218        1.1  fredette 		/* XXX: Consult PROM properties for this?! */
    219        1.1  fredette 		cs->cs_defspeed = zs_get_speed(cs);
    220        1.1  fredette 		cs->cs_defcflag = zs_def_cflag;
    221        1.1  fredette 
    222        1.1  fredette 		/* Make these correspond to cs_defcflag (-crtscts) */
    223        1.1  fredette 		cs->cs_rr0_dcd = ZSRR0_DCD;
    224        1.1  fredette 		cs->cs_rr0_cts = 0;
    225        1.1  fredette 		cs->cs_wr5_dtr = ZSWR5_DTR | ZSWR5_RTS;
    226        1.1  fredette 		cs->cs_wr5_rts = 0;
    227        1.1  fredette 
    228        1.1  fredette 		/*
    229        1.1  fredette 		 * Clear the master interrupt enable.
    230        1.1  fredette 		 * The INTENA is common to both channels,
    231        1.1  fredette 		 * so just do it on the A channel.
    232        1.1  fredette 		 */
    233        1.1  fredette 		if (channel == 0) {
    234        1.1  fredette 			zs_write_reg(cs, 9, 0);
    235        1.1  fredette 		}
    236        1.1  fredette 
    237        1.1  fredette 		/*
    238        1.1  fredette 		 * Look for a child driver for this channel.
    239        1.1  fredette 		 * The child attach will setup the hardware.
    240        1.1  fredette 		 */
    241        1.1  fredette 		if (!(child =
    242        1.1  fredette 		      config_found(&zsc->zsc_dev, (void *)&zsc_args, zs_print))) {
    243        1.1  fredette 			/* No sub-driver.  Just reset it. */
    244        1.1  fredette 			u_char reset = (channel == 0) ?
    245        1.1  fredette 				ZSWR9_A_RESET : ZSWR9_B_RESET;
    246        1.1  fredette 			s = splzs();
    247        1.1  fredette 			zs_write_reg(cs,  9, reset);
    248        1.1  fredette 			splx(s);
    249        1.1  fredette 		}
    250        1.1  fredette #if (NKBD > 0) || (NMS > 0)
    251        1.1  fredette 		/*
    252        1.1  fredette 		 * If this was a zstty it has a keyboard
    253        1.1  fredette 		 * property on it we need to attach the
    254        1.1  fredette 		 * sunkbd and sunms line disciplines.
    255        1.1  fredette 		 */
    256        1.1  fredette 		if (child
    257       1.12   thorpej 		    && device_is_a(child, "zstty")) {
    258        1.1  fredette 			struct kbd_ms_tty_attach_args kma;
    259        1.1  fredette 			struct zstty_softc {
    260        1.1  fredette 				/* The following are the only fields we need here */
    261        1.1  fredette 				struct	device zst_dev;
    262        1.1  fredette 				struct  tty *zst_tty;
    263        1.1  fredette 				struct	zs_chanstate *zst_cs;
    264        1.1  fredette 			} *zst = (struct zstty_softc *)child;
    265        1.1  fredette 			struct tty *tp;
    266        1.1  fredette 
    267        1.1  fredette 			kma.kmta_tp = tp = zst->zst_tty;
    268        1.1  fredette 			if (tp != NULL) {
    269        1.1  fredette 				kma.kmta_dev = tp->t_dev;
    270        1.1  fredette 				kma.kmta_consdev = zsc_args.consdev;
    271        1.1  fredette 
    272        1.1  fredette 				/* Attach 'em if we got 'em. */
    273        1.1  fredette 				switch(zs_peripheral_type(zsc->zsc_promunit,
    274        1.1  fredette 						 	  zsc->zsc_node,
    275        1.1  fredette 						  	  channel)) {
    276        1.1  fredette 				case ZS_PERIPHERAL_SUNKBD:
    277        1.1  fredette #if (NKBD > 0)
    278        1.1  fredette 					kma.kmta_name = "keyboard";
    279        1.1  fredette 					config_found(child, (void *)&kma, NULL);
    280        1.1  fredette #endif
    281        1.1  fredette 					break;
    282        1.1  fredette 				case ZS_PERIPHERAL_SUNMS:
    283        1.1  fredette #if (NMS > 0)
    284        1.1  fredette 					kma.kmta_name = "mouse";
    285        1.1  fredette 					config_found(child, (void *)&kma, NULL);
    286        1.1  fredette #endif
    287        1.1  fredette 					break;
    288        1.1  fredette 				default:
    289        1.1  fredette 					break;
    290        1.1  fredette 				}
    291        1.1  fredette 			}
    292        1.1  fredette 		}
    293        1.1  fredette #endif
    294        1.1  fredette 	}
    295        1.1  fredette 
    296        1.1  fredette 	/*
    297       1.13   tsutsui 	 * Now safe to install interrupt handlers.
    298        1.1  fredette 	 */
    299        1.1  fredette 	bus_intr_establish(zsc->zsc_bustag, pri, IPL_SERIAL, 0, zshard, zsc);
    300  1.14.24.2       mjf 	if (!(zsc->zsc_softintr = softint_establish(SOFTINT_SERIAL,
    301  1.14.24.2       mjf 	    zssoft, zsc)))
    302        1.4    provos 		panic("zsattach: could not establish soft interrupt");
    303        1.1  fredette 
    304        1.1  fredette 	evcnt_attach_dynamic(&zsc->zsc_intrcnt, EVCNT_TYPE_INTR, NULL,
    305        1.1  fredette 	    zsc->zsc_dev.dv_xname, "intr");
    306        1.1  fredette 
    307        1.1  fredette 
    308        1.1  fredette 	/*
    309        1.1  fredette 	 * Set the master interrupt enable and interrupt vector.
    310        1.1  fredette 	 * (common to both channels, do it on A)
    311        1.1  fredette 	 */
    312        1.1  fredette 	cs = zsc->zsc_cs[0];
    313        1.1  fredette 	s = splhigh();
    314        1.1  fredette 	/* interrupt vector */
    315        1.1  fredette 	zs_write_reg(cs, 2, zs_init_reg[2]);
    316        1.1  fredette 	/* master interrupt control (enable) */
    317        1.1  fredette 	zs_write_reg(cs, 9, zs_init_reg[9]);
    318        1.1  fredette 	splx(s);
    319        1.1  fredette 
    320        1.1  fredette }
    321        1.1  fredette 
    322       1.10       chs static int
    323       1.10       chs zs_print(void *aux, const char *name)
    324        1.1  fredette {
    325        1.1  fredette 	struct zsc_attach_args *args = aux;
    326        1.1  fredette 
    327        1.1  fredette 	if (name != NULL)
    328        1.6   thorpej 		aprint_normal("%s: ", name);
    329        1.1  fredette 
    330        1.1  fredette 	if (args->channel != -1)
    331        1.6   thorpej 		aprint_normal(" channel %d", args->channel);
    332        1.1  fredette 
    333        1.1  fredette 	return (UNCONF);
    334        1.1  fredette }
    335        1.1  fredette 
    336       1.10       chs static int
    337       1.10       chs zshard(void *arg)
    338        1.1  fredette {
    339        1.1  fredette 	struct zsc_softc *zsc = (struct zsc_softc *)arg;
    340        1.1  fredette 	int rr3, rval;
    341        1.1  fredette 
    342        1.1  fredette 	rval = 0;
    343        1.1  fredette 	while ((rr3 = zsc_intr_hard(zsc))) {
    344        1.1  fredette 		/* Count up the interrupts. */
    345        1.1  fredette 		rval |= rr3;
    346        1.1  fredette 		zsc->zsc_intrcnt.ev_count++;
    347        1.1  fredette 	}
    348        1.1  fredette 	if (((zsc->zsc_cs[0] && zsc->zsc_cs[0]->cs_softreq) ||
    349        1.1  fredette 	     (zsc->zsc_cs[1] && zsc->zsc_cs[1]->cs_softreq)) &&
    350        1.1  fredette 	    zsc->zsc_softintr) {
    351  1.14.24.2       mjf 		softint_schedule(zsc->zsc_softintr);
    352        1.1  fredette 	}
    353        1.1  fredette 	return (rval);
    354        1.1  fredette }
    355        1.1  fredette 
    356       1.10       chs int
    357       1.10       chs zscheckintr(void *arg)
    358        1.1  fredette {
    359        1.1  fredette 	struct zsc_softc *zsc;
    360        1.1  fredette 	int unit, rval;
    361        1.1  fredette 
    362        1.1  fredette 	rval = 0;
    363        1.1  fredette 	for (unit = 0; unit < zs_cd.cd_ndevs; unit++) {
    364        1.1  fredette 
    365        1.1  fredette 		zsc = zs_cd.cd_devs[unit];
    366        1.1  fredette 		if (zsc == NULL)
    367        1.1  fredette 			continue;
    368        1.1  fredette 		rval = (zshard((void *)zsc) || rval);
    369        1.1  fredette 	}
    370        1.1  fredette 	return (rval);
    371        1.1  fredette }
    372        1.1  fredette 
    373        1.1  fredette 
    374        1.1  fredette /*
    375        1.1  fredette  * We need this only for TTY_DEBUG purposes.
    376        1.1  fredette  */
    377       1.10       chs static void
    378       1.10       chs zssoft(void *arg)
    379        1.1  fredette {
    380        1.1  fredette 	struct zsc_softc *zsc = (struct zsc_softc *)arg;
    381        1.1  fredette 	int s;
    382        1.1  fredette 
    383        1.1  fredette 	/* Make sure we call the tty layer at spltty. */
    384        1.1  fredette 	s = spltty();
    385        1.1  fredette 	(void)zsc_intr_soft(zsc);
    386        1.1  fredette #ifdef TTY_DEBUG
    387        1.1  fredette 	{
    388        1.1  fredette 		struct zstty_softc *zst0 = zsc->zsc_cs[0]->cs_private;
    389        1.1  fredette 		struct zstty_softc *zst1 = zsc->zsc_cs[1]->cs_private;
    390        1.1  fredette 		if (zst0->zst_overflows || zst1->zst_overflows ) {
    391        1.1  fredette 			struct trapframe *frame = (struct trapframe *)arg;
    392        1.1  fredette 
    393        1.1  fredette 			printf("zs silo overflow from %p\n",
    394        1.1  fredette 			       (long)frame->tf_pc);
    395        1.1  fredette 		}
    396        1.1  fredette 	}
    397        1.1  fredette #endif
    398        1.1  fredette 	splx(s);
    399        1.1  fredette }
    400        1.1  fredette 
    401        1.1  fredette 
    402        1.1  fredette /*
    403        1.1  fredette  * Compute the current baud rate given a ZS channel.
    404        1.1  fredette  */
    405       1.10       chs static int
    406       1.10       chs zs_get_speed(struct zs_chanstate *cs)
    407        1.1  fredette {
    408        1.1  fredette 	int tconst;
    409        1.1  fredette 
    410        1.1  fredette 	tconst = zs_read_reg(cs, 12);
    411        1.1  fredette 	tconst |= zs_read_reg(cs, 13) << 8;
    412        1.1  fredette 	return (TCONST_TO_BPS(cs->cs_brg_clk, tconst));
    413        1.1  fredette }
    414        1.1  fredette 
    415        1.1  fredette /*
    416        1.1  fredette  * MD functions for setting the baud rate and control modes.
    417        1.1  fredette  */
    418       1.10       chs int
    419       1.10       chs zs_set_speed(struct zs_chanstate *cs, int bps)
    420        1.1  fredette {
    421        1.1  fredette 	int tconst, real_bps;
    422        1.1  fredette 
    423        1.1  fredette 	if (bps == 0)
    424        1.1  fredette 		return (0);
    425        1.1  fredette 
    426        1.1  fredette #ifdef	DIAGNOSTIC
    427        1.1  fredette 	if (cs->cs_brg_clk == 0)
    428        1.1  fredette 		panic("zs_set_speed");
    429        1.1  fredette #endif
    430        1.1  fredette 
    431        1.1  fredette 	tconst = BPS_TO_TCONST(cs->cs_brg_clk, bps);
    432        1.1  fredette 	if (tconst < 0)
    433        1.1  fredette 		return (EINVAL);
    434        1.1  fredette 
    435        1.1  fredette 	/* Convert back to make sure we can do it. */
    436        1.1  fredette 	real_bps = TCONST_TO_BPS(cs->cs_brg_clk, tconst);
    437        1.1  fredette 
    438        1.1  fredette 	/* XXX - Allow some tolerance here? */
    439        1.1  fredette 	if (real_bps != bps)
    440        1.1  fredette 		return (EINVAL);
    441        1.1  fredette 
    442        1.1  fredette 	cs->cs_preg[12] = tconst;
    443        1.1  fredette 	cs->cs_preg[13] = tconst >> 8;
    444        1.1  fredette 
    445        1.1  fredette 	/* Caller will stuff the pending registers. */
    446        1.1  fredette 	return (0);
    447        1.1  fredette }
    448        1.1  fredette 
    449       1.10       chs int
    450       1.10       chs zs_set_modes(struct zs_chanstate *cs, int cflag	/* bits per second */)
    451        1.1  fredette {
    452        1.1  fredette 	int s;
    453        1.1  fredette 
    454        1.1  fredette 	/*
    455        1.1  fredette 	 * Output hardware flow control on the chip is horrendous:
    456        1.1  fredette 	 * if carrier detect drops, the receiver is disabled, and if
    457        1.1  fredette 	 * CTS drops, the transmitter is stoped IN MID CHARACTER!
    458        1.1  fredette 	 * Therefore, NEVER set the HFC bit, and instead use the
    459        1.1  fredette 	 * status interrupt to detect CTS changes.
    460        1.1  fredette 	 */
    461        1.1  fredette 	s = splzs();
    462        1.1  fredette 	cs->cs_rr0_pps = 0;
    463        1.1  fredette 	if ((cflag & (CLOCAL | MDMBUF)) != 0) {
    464        1.1  fredette 		cs->cs_rr0_dcd = 0;
    465        1.1  fredette 		if ((cflag & MDMBUF) == 0)
    466        1.1  fredette 			cs->cs_rr0_pps = ZSRR0_DCD;
    467        1.1  fredette 	} else
    468        1.1  fredette 		cs->cs_rr0_dcd = ZSRR0_DCD;
    469        1.1  fredette 	if ((cflag & CRTSCTS) != 0) {
    470        1.1  fredette 		cs->cs_wr5_dtr = ZSWR5_DTR;
    471        1.1  fredette 		cs->cs_wr5_rts = ZSWR5_RTS;
    472        1.1  fredette 		cs->cs_rr0_cts = ZSRR0_CTS;
    473        1.1  fredette 	} else if ((cflag & CDTRCTS) != 0) {
    474        1.1  fredette 		cs->cs_wr5_dtr = 0;
    475        1.1  fredette 		cs->cs_wr5_rts = ZSWR5_DTR;
    476        1.1  fredette 		cs->cs_rr0_cts = ZSRR0_CTS;
    477        1.1  fredette 	} else if ((cflag & MDMBUF) != 0) {
    478        1.1  fredette 		cs->cs_wr5_dtr = 0;
    479        1.1  fredette 		cs->cs_wr5_rts = ZSWR5_DTR;
    480        1.1  fredette 		cs->cs_rr0_cts = ZSRR0_DCD;
    481        1.1  fredette 	} else {
    482        1.1  fredette 		cs->cs_wr5_dtr = ZSWR5_DTR | ZSWR5_RTS;
    483        1.1  fredette 		cs->cs_wr5_rts = 0;
    484        1.1  fredette 		cs->cs_rr0_cts = 0;
    485        1.1  fredette 	}
    486        1.1  fredette 	splx(s);
    487        1.1  fredette 
    488        1.1  fredette 	/* Caller will stuff the pending registers. */
    489        1.1  fredette 	return (0);
    490        1.1  fredette }
    491        1.1  fredette 
    492        1.1  fredette 
    493        1.1  fredette /*
    494        1.1  fredette  * Read or write the chip with suitable delays.
    495        1.1  fredette  */
    496        1.1  fredette 
    497        1.1  fredette u_char
    498       1.10       chs zs_read_reg(struct zs_chanstate *cs, u_char reg)
    499        1.1  fredette {
    500        1.1  fredette 	u_char val;
    501        1.1  fredette 
    502        1.1  fredette 	*cs->cs_reg_csr = reg;
    503        1.1  fredette 	ZS_DELAY();
    504        1.1  fredette 	val = *cs->cs_reg_csr;
    505        1.1  fredette 	ZS_DELAY();
    506        1.1  fredette 	return (val);
    507        1.1  fredette }
    508        1.1  fredette 
    509        1.1  fredette void
    510       1.10       chs zs_write_reg(struct zs_chanstate *cs, u_char reg, u_char val)
    511        1.1  fredette {
    512        1.1  fredette 	*cs->cs_reg_csr = reg;
    513        1.1  fredette 	ZS_DELAY();
    514        1.1  fredette 	*cs->cs_reg_csr = val;
    515        1.1  fredette 	ZS_DELAY();
    516        1.1  fredette }
    517        1.1  fredette 
    518        1.1  fredette u_char
    519       1.10       chs zs_read_csr(struct zs_chanstate *cs)
    520        1.1  fredette {
    521        1.1  fredette 	u_char val;
    522        1.1  fredette 
    523        1.1  fredette 	val = *cs->cs_reg_csr;
    524        1.1  fredette 	ZS_DELAY();
    525        1.1  fredette 	return (val);
    526        1.1  fredette }
    527        1.1  fredette 
    528       1.10       chs void
    529       1.10       chs zs_write_csr(struct zs_chanstate *cs, u_char val)
    530        1.1  fredette {
    531        1.1  fredette 	*cs->cs_reg_csr = val;
    532        1.1  fredette 	ZS_DELAY();
    533        1.1  fredette }
    534        1.1  fredette 
    535       1.10       chs u_char
    536       1.10       chs zs_read_data(struct zs_chanstate *cs)
    537        1.1  fredette {
    538        1.1  fredette 	u_char val;
    539        1.1  fredette 
    540        1.1  fredette 	val = *cs->cs_reg_data;
    541        1.1  fredette 	ZS_DELAY();
    542        1.1  fredette 	return (val);
    543        1.1  fredette }
    544        1.1  fredette 
    545       1.10       chs void
    546       1.10       chs zs_write_data(struct zs_chanstate *cs, u_char val)
    547        1.1  fredette {
    548        1.1  fredette 	*cs->cs_reg_data = val;
    549        1.1  fredette 	ZS_DELAY();
    550        1.1  fredette }
    551        1.1  fredette 
    552        1.1  fredette /****************************************************************
    553        1.1  fredette  * Console support functions (Sun specific!)
    554        1.1  fredette  * Note: this code is allowed to know about the layout of
    555        1.1  fredette  * the chip registers, and uses that to keep things simple.
    556        1.1  fredette  * XXX - I think I like the mvme167 code better. -gwr
    557        1.1  fredette  ****************************************************************/
    558        1.1  fredette 
    559       1.10       chs extern void Debugger(void);
    560        1.1  fredette 
    561        1.1  fredette /*
    562        1.1  fredette  * Handle user request to enter kernel debugger.
    563        1.1  fredette  */
    564       1.10       chs void
    565       1.10       chs zs_abort(struct zs_chanstate *cs)
    566        1.1  fredette {
    567        1.1  fredette 	volatile struct zschan *zc = zs_conschan_get;
    568        1.1  fredette 	int rr0;
    569        1.1  fredette 
    570        1.1  fredette 	/* Wait for end of break to avoid PROM abort. */
    571        1.1  fredette 	/* XXX - Limit the wait? */
    572        1.1  fredette 	do {
    573        1.1  fredette 		rr0 = zc->zc_csr;
    574        1.1  fredette 		ZS_DELAY();
    575        1.1  fredette 	} while (rr0 & ZSRR0_BREAK);
    576        1.1  fredette 
    577        1.1  fredette #if defined(KGDB)
    578        1.1  fredette 	zskgdb(cs);
    579        1.1  fredette #elif defined(DDB)
    580        1.1  fredette 	{
    581        1.1  fredette 		extern int db_active;
    582        1.1  fredette 
    583        1.1  fredette 		if (!db_active)
    584        1.1  fredette 			Debugger();
    585        1.1  fredette 		else
    586        1.1  fredette 			/* Debugger is probably hozed */
    587        1.1  fredette 			callrom();
    588        1.1  fredette 	}
    589        1.1  fredette #else
    590        1.1  fredette 	printf("stopping on keyboard abort\n");
    591        1.1  fredette 	callrom();
    592        1.1  fredette #endif
    593        1.1  fredette }
    594        1.1  fredette 
    595        1.1  fredette 
    596        1.1  fredette /*
    597        1.1  fredette  * Polled input char.
    598        1.1  fredette  */
    599       1.10       chs int
    600       1.10       chs zs_getc(void *arg)
    601        1.1  fredette {
    602        1.1  fredette 	volatile struct zschan *zc = arg;
    603        1.1  fredette 	int s, c, rr0;
    604        1.1  fredette 
    605        1.1  fredette 	s = splhigh();
    606        1.1  fredette 	/* Wait for a character to arrive. */
    607        1.1  fredette 	do {
    608        1.1  fredette 		rr0 = zc->zc_csr;
    609        1.1  fredette 		ZS_DELAY();
    610        1.1  fredette 	} while ((rr0 & ZSRR0_RX_READY) == 0);
    611        1.1  fredette 
    612        1.1  fredette 	c = zc->zc_data;
    613        1.1  fredette 	ZS_DELAY();
    614        1.1  fredette 	splx(s);
    615        1.1  fredette 
    616        1.1  fredette 	/*
    617        1.1  fredette 	 * This is used by the kd driver to read scan codes,
    618        1.1  fredette 	 * so don't translate '\r' ==> '\n' here...
    619        1.1  fredette 	 */
    620        1.1  fredette 	return (c);
    621        1.1  fredette }
    622        1.1  fredette 
    623        1.1  fredette /*
    624        1.1  fredette  * Polled output char.
    625        1.1  fredette  */
    626       1.10       chs void
    627       1.10       chs zs_putc(void *arg, int c)
    628        1.1  fredette {
    629        1.1  fredette 	volatile struct zschan *zc = arg;
    630        1.1  fredette 	int s, rr0;
    631        1.1  fredette 
    632        1.1  fredette 	s = splhigh();
    633        1.1  fredette 
    634        1.1  fredette 	/* Wait for transmitter to become ready. */
    635        1.1  fredette 	do {
    636        1.1  fredette 		rr0 = zc->zc_csr;
    637        1.1  fredette 		ZS_DELAY();
    638        1.1  fredette 	} while ((rr0 & ZSRR0_TX_READY) == 0);
    639        1.1  fredette 
    640        1.1  fredette 	/*
    641        1.1  fredette 	 * Send the next character.
    642        1.1  fredette 	 * Now you'd think that this could be followed by a ZS_DELAY()
    643        1.1  fredette 	 * just like all the other chip accesses, but it turns out that
    644        1.1  fredette 	 * the `transmit-ready' interrupt isn't de-asserted until
    645        1.1  fredette 	 * some period of time after the register write completes
    646        1.1  fredette 	 * (more than a couple instructions).  So to avoid stray
    647        1.9       wiz 	 * interrupts we put in the 2us delay regardless of CPU model.
    648        1.1  fredette 	 */
    649        1.1  fredette 	zc->zc_data = c;
    650        1.1  fredette 	delay(2);
    651        1.1  fredette 
    652        1.1  fredette 	splx(s);
    653        1.1  fredette }
    654        1.1  fredette 
    655        1.1  fredette /*****************************************************************/
    656        1.1  fredette 
    657        1.1  fredette 
    658        1.1  fredette 
    659        1.1  fredette 
    660        1.1  fredette /*
    661        1.1  fredette  * Polled console input putchar.
    662        1.1  fredette  */
    663       1.10       chs static int
    664       1.10       chs zscngetc(dev_t dev)
    665        1.1  fredette {
    666        1.1  fredette 	return (zs_getc(zs_conschan_get));
    667        1.1  fredette }
    668        1.1  fredette 
    669        1.1  fredette /*
    670        1.1  fredette  * Polled console output putchar.
    671        1.1  fredette  */
    672       1.10       chs static void
    673       1.10       chs zscnputc(dev_t dev, int c)
    674        1.1  fredette {
    675        1.1  fredette 	zs_putc(zs_conschan_put, c);
    676        1.1  fredette }
    677        1.1  fredette 
    678        1.1  fredette int swallow_zsintrs;
    679        1.1  fredette 
    680       1.10       chs static void
    681       1.10       chs zscnpollc(dev_t dev, int on)
    682        1.1  fredette {
    683        1.1  fredette 	/*
    684        1.1  fredette 	 * Need to tell zs driver to acknowledge all interrupts or we get
    685        1.1  fredette 	 * annoying spurious interrupt messages.  This is because mucking
    686        1.1  fredette 	 * with spl() levels during polling does not prevent interrupts from
    687        1.1  fredette 	 * being generated.
    688        1.1  fredette 	 */
    689        1.1  fredette 
    690        1.1  fredette 	if (on) swallow_zsintrs++;
    691        1.1  fredette 	else swallow_zsintrs--;
    692        1.1  fredette }
    693        1.1  fredette 
    694