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zs.c revision 1.7.2.4
      1  1.7.2.4     skrll /*	$NetBSD: zs.c,v 1.7.2.4 2005/01/24 08:34:34 skrll 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      1.1  fredette 
     47  1.7.2.1     skrll #include <sys/cdefs.h>
     48  1.7.2.4     skrll __KERNEL_RCSID(0, "$NetBSD: zs.c,v 1.7.2.4 2005/01/24 08:34:34 skrll Exp $");
     49  1.7.2.1     skrll 
     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      1.1  fredette 
     65      1.1  fredette #include <machine/autoconf.h>
     66      1.1  fredette #include <machine/promlib.h>
     67      1.1  fredette #include <machine/cpu.h>
     68      1.1  fredette #include <machine/eeprom.h>
     69      1.1  fredette #include <machine/psl.h>
     70      1.1  fredette #include <machine/z8530var.h>
     71      1.1  fredette 
     72      1.1  fredette #include <dev/cons.h>
     73      1.1  fredette #include <dev/ic/z8530reg.h>
     74      1.1  fredette #include <dev/sun/kbd_ms_ttyvar.h>
     75      1.1  fredette #include <ddb/db_output.h>
     76      1.1  fredette 
     77      1.1  fredette #include <sun2/dev/cons.h>
     78      1.1  fredette 
     79      1.1  fredette #include "kbd.h"	/* NKBD */
     80      1.1  fredette #include "ms.h"		/* NMS */
     81      1.1  fredette 
     82      1.1  fredette /*
     83      1.1  fredette  * Some warts needed by z8530tty.c -
     84      1.1  fredette  * The default parity REALLY needs to be the same as the PROM uses,
     85      1.1  fredette  * or you can not see messages done with printf during boot-up...
     86      1.1  fredette  */
     87      1.1  fredette int zs_def_cflag = (CREAD | CS8 | HUPCL);
     88      1.1  fredette 
     89      1.1  fredette /* ZS channel used as the console device (if any) */
     90      1.1  fredette void *zs_conschan_get, *zs_conschan_put;
     91      1.1  fredette 
     92      1.1  fredette static u_char zs_init_reg[16] = {
     93      1.1  fredette 	0,	/* 0: CMD (reset, etc.) */
     94      1.1  fredette 	0,	/* 1: No interrupts yet. */
     95      1.1  fredette #ifdef  ZS_INIT_IVECT
     96      1.1  fredette 	ZS_INIT_IVECT,	/* 2: IVECT */
     97      1.1  fredette #else
     98      1.1  fredette 	0,	/* 2: IVECT */
     99      1.1  fredette #endif
    100      1.1  fredette 	ZSWR3_RX_8 | ZSWR3_RX_ENABLE,
    101      1.1  fredette 	ZSWR4_CLK_X16 | ZSWR4_ONESB | ZSWR4_EVENP,
    102      1.1  fredette 	ZSWR5_TX_8 | ZSWR5_TX_ENABLE,
    103      1.1  fredette 	0,	/* 6: TXSYNC/SYNCLO */
    104      1.1  fredette 	0,	/* 7: RXSYNC/SYNCHI */
    105      1.1  fredette 	0,	/* 8: alias for data port */
    106      1.1  fredette #ifdef  ZS_INIT_IVECT
    107      1.1  fredette 	ZSWR9_MASTER_IE,
    108      1.1  fredette #else
    109      1.1  fredette 	ZSWR9_MASTER_IE | ZSWR9_NO_VECTOR,
    110      1.1  fredette #endif
    111      1.1  fredette 	0,	/*10: Misc. TX/RX control bits */
    112      1.1  fredette 	ZSWR11_TXCLK_BAUD | ZSWR11_RXCLK_BAUD,
    113      1.1  fredette 	((PCLK/32)/9600)-2,	/*12: BAUDLO (default=9600) */
    114      1.1  fredette 	0,			/*13: BAUDHI (default=9600) */
    115      1.1  fredette 	ZSWR14_BAUD_ENA | ZSWR14_BAUD_FROM_PCLK,
    116      1.1  fredette 	ZSWR15_BREAK_IE,
    117      1.1  fredette };
    118      1.1  fredette 
    119      1.1  fredette /* Console ops */
    120  1.7.2.4     skrll static int  zscngetc(dev_t);
    121  1.7.2.4     skrll static void zscnputc(dev_t, int);
    122  1.7.2.4     skrll static void zscnpollc(dev_t, int);
    123      1.1  fredette 
    124      1.1  fredette struct consdev zs_consdev = {
    125      1.1  fredette 	NULL,
    126      1.1  fredette 	NULL,
    127      1.1  fredette 	zscngetc,
    128      1.1  fredette 	zscnputc,
    129      1.1  fredette 	zscnpollc,
    130      1.1  fredette 	NULL,
    131      1.1  fredette };
    132      1.1  fredette 
    133      1.1  fredette 
    134      1.1  fredette /****************************************************************
    135      1.1  fredette  * Autoconfig
    136      1.1  fredette  ****************************************************************/
    137      1.1  fredette 
    138  1.7.2.4     skrll static int  zs_print(void *, const char *name);
    139      1.1  fredette 
    140      1.1  fredette extern struct cfdriver zs_cd;
    141      1.1  fredette 
    142      1.1  fredette /* Interrupt handlers. */
    143  1.7.2.4     skrll int zscheckintr(void *);
    144  1.7.2.4     skrll static int zshard(void *);
    145  1.7.2.4     skrll static void zssoft(void *);
    146      1.1  fredette 
    147  1.7.2.4     skrll static int zs_get_speed(struct zs_chanstate *);
    148      1.1  fredette 
    149      1.1  fredette /*
    150      1.1  fredette  * Attach a found zs.
    151      1.1  fredette  *
    152      1.1  fredette  * USE ROM PROPERTIES port-a-ignore-cd AND port-b-ignore-cd FOR
    153      1.1  fredette  * SOFT CARRIER, AND keyboard PROPERTY FOR KEYBOARD/MOUSE?
    154      1.1  fredette  */
    155  1.7.2.4     skrll void
    156  1.7.2.4     skrll zs_attach(struct zsc_softc *zsc, struct zsdevice *zsd, int pri)
    157      1.1  fredette {
    158      1.1  fredette 	struct zsc_attach_args zsc_args;
    159      1.1  fredette 	struct zs_chanstate *cs;
    160      1.1  fredette 	int s, channel, softpri = IPL_SOFTSERIAL;
    161      1.1  fredette 
    162      1.1  fredette 	if (zsd == NULL) {
    163      1.1  fredette 		printf("configuration incomplete\n");
    164      1.1  fredette 		return;
    165      1.1  fredette 	}
    166      1.1  fredette 
    167      1.1  fredette 	printf(" softpri %d\n", softpri);
    168      1.1  fredette 
    169      1.1  fredette 	/*
    170      1.1  fredette 	 * Initialize software state for each channel.
    171      1.1  fredette 	 */
    172      1.1  fredette 	for (channel = 0; channel < 2; channel++) {
    173      1.1  fredette 		struct zschan *zc;
    174      1.1  fredette 		struct device *child;
    175      1.1  fredette 
    176      1.1  fredette 		zsc_args.channel = channel;
    177      1.1  fredette 		cs = &zsc->zsc_cs_store[channel];
    178      1.1  fredette 		zsc->zsc_cs[channel] = cs;
    179      1.1  fredette 
    180      1.7        pk 		simple_lock_init(&cs->cs_lock);
    181      1.1  fredette 		cs->cs_channel = channel;
    182      1.1  fredette 		cs->cs_private = NULL;
    183      1.1  fredette 		cs->cs_ops = &zsops_null;
    184      1.1  fredette 		cs->cs_brg_clk = PCLK / 16;
    185      1.1  fredette 
    186      1.1  fredette 		zc = (channel == 0) ? &zsd->zs_chan_a : &zsd->zs_chan_b;
    187      1.1  fredette 
    188      1.1  fredette 		zsc_args.consdev = NULL;
    189      1.1  fredette 		zsc_args.hwflags = zs_console_flags(zsc->zsc_promunit,
    190      1.1  fredette 						    zsc->zsc_node,
    191      1.1  fredette 						    channel);
    192      1.1  fredette 
    193      1.1  fredette 		if (zsc_args.hwflags & ZS_HWFLAG_CONSOLE) {
    194      1.1  fredette 			zsc_args.hwflags |= ZS_HWFLAG_USE_CONSDEV;
    195      1.1  fredette 			zsc_args.consdev = &zs_consdev;
    196      1.1  fredette 		}
    197      1.1  fredette 
    198      1.1  fredette 		if ((zsc_args.hwflags & ZS_HWFLAG_CONSOLE_INPUT) != 0) {
    199      1.1  fredette 			zs_conschan_get = zc;
    200      1.1  fredette 		}
    201      1.1  fredette 		if ((zsc_args.hwflags & ZS_HWFLAG_CONSOLE_OUTPUT) != 0) {
    202      1.1  fredette 			zs_conschan_put = zc;
    203      1.1  fredette 		}
    204      1.1  fredette 
    205      1.1  fredette 		/* Children need to set cn_dev, etc */
    206      1.1  fredette 		cs->cs_reg_csr  = &zc->zc_csr;
    207      1.1  fredette 		cs->cs_reg_data = &zc->zc_data;
    208      1.1  fredette 
    209      1.5  fredette 		memcpy(cs->cs_creg, zs_init_reg, 16);
    210      1.5  fredette 		memcpy(cs->cs_preg, zs_init_reg, 16);
    211      1.1  fredette 
    212      1.1  fredette 		/* XXX: Consult PROM properties for this?! */
    213      1.1  fredette 		cs->cs_defspeed = zs_get_speed(cs);
    214      1.1  fredette 		cs->cs_defcflag = zs_def_cflag;
    215      1.1  fredette 
    216      1.1  fredette 		/* Make these correspond to cs_defcflag (-crtscts) */
    217      1.1  fredette 		cs->cs_rr0_dcd = ZSRR0_DCD;
    218      1.1  fredette 		cs->cs_rr0_cts = 0;
    219      1.1  fredette 		cs->cs_wr5_dtr = ZSWR5_DTR | ZSWR5_RTS;
    220      1.1  fredette 		cs->cs_wr5_rts = 0;
    221      1.1  fredette 
    222      1.1  fredette 		/*
    223      1.1  fredette 		 * Clear the master interrupt enable.
    224      1.1  fredette 		 * The INTENA is common to both channels,
    225      1.1  fredette 		 * so just do it on the A channel.
    226      1.1  fredette 		 */
    227      1.1  fredette 		if (channel == 0) {
    228      1.1  fredette 			zs_write_reg(cs, 9, 0);
    229      1.1  fredette 		}
    230      1.1  fredette 
    231      1.1  fredette 		/*
    232      1.1  fredette 		 * Look for a child driver for this channel.
    233      1.1  fredette 		 * The child attach will setup the hardware.
    234      1.1  fredette 		 */
    235      1.1  fredette 		if (!(child =
    236      1.1  fredette 		      config_found(&zsc->zsc_dev, (void *)&zsc_args, zs_print))) {
    237      1.1  fredette 			/* No sub-driver.  Just reset it. */
    238      1.1  fredette 			u_char reset = (channel == 0) ?
    239      1.1  fredette 				ZSWR9_A_RESET : ZSWR9_B_RESET;
    240      1.1  fredette 			s = splzs();
    241      1.1  fredette 			zs_write_reg(cs,  9, reset);
    242      1.1  fredette 			splx(s);
    243      1.1  fredette 		}
    244      1.1  fredette #if (NKBD > 0) || (NMS > 0)
    245      1.1  fredette 		/*
    246      1.1  fredette 		 * If this was a zstty it has a keyboard
    247      1.1  fredette 		 * property on it we need to attach the
    248      1.1  fredette 		 * sunkbd and sunms line disciplines.
    249      1.1  fredette 		 */
    250      1.1  fredette 		if (child
    251      1.3   thorpej 		    && (!strcmp(child->dv_cfdata->cf_name,
    252      1.3   thorpej 		    		"zstty"))) {
    253      1.1  fredette 			struct kbd_ms_tty_attach_args kma;
    254      1.1  fredette 			struct zstty_softc {
    255      1.1  fredette 				/* The following are the only fields we need here */
    256      1.1  fredette 				struct	device zst_dev;
    257      1.1  fredette 				struct  tty *zst_tty;
    258      1.1  fredette 				struct	zs_chanstate *zst_cs;
    259      1.1  fredette 			} *zst = (struct zstty_softc *)child;
    260      1.1  fredette 			struct tty *tp;
    261      1.1  fredette 
    262      1.1  fredette 			kma.kmta_tp = tp = zst->zst_tty;
    263      1.1  fredette 			if (tp != NULL) {
    264      1.1  fredette 				kma.kmta_dev = tp->t_dev;
    265      1.1  fredette 				kma.kmta_consdev = zsc_args.consdev;
    266      1.1  fredette 
    267      1.1  fredette 				/* Attach 'em if we got 'em. */
    268      1.1  fredette 				switch(zs_peripheral_type(zsc->zsc_promunit,
    269      1.1  fredette 						 	  zsc->zsc_node,
    270      1.1  fredette 						  	  channel)) {
    271      1.1  fredette 				case ZS_PERIPHERAL_SUNKBD:
    272      1.1  fredette #if (NKBD > 0)
    273      1.1  fredette 					kma.kmta_name = "keyboard";
    274      1.1  fredette 					config_found(child, (void *)&kma, NULL);
    275      1.1  fredette #endif
    276      1.1  fredette 					break;
    277      1.1  fredette 				case ZS_PERIPHERAL_SUNMS:
    278      1.1  fredette #if (NMS > 0)
    279      1.1  fredette 					kma.kmta_name = "mouse";
    280      1.1  fredette 					config_found(child, (void *)&kma, NULL);
    281      1.1  fredette #endif
    282      1.1  fredette 					break;
    283      1.1  fredette 				default:
    284      1.1  fredette 					break;
    285      1.1  fredette 				}
    286      1.1  fredette 			}
    287      1.1  fredette 		}
    288      1.1  fredette #endif
    289      1.1  fredette 	}
    290      1.1  fredette 
    291      1.1  fredette 	/*
    292      1.1  fredette 	 * Now safe to install interrupt handlers.  Note the arguments
    293      1.1  fredette 	 * to the interrupt handlers aren't used.  Note, we only do this
    294      1.1  fredette 	 * once since both SCCs interrupt at the same level and vector.
    295      1.1  fredette 	 */
    296      1.1  fredette 	bus_intr_establish(zsc->zsc_bustag, pri, IPL_SERIAL, 0, zshard, zsc);
    297      1.1  fredette 	if (!(zsc->zsc_softintr = softintr_establish(softpri, zssoft, zsc)))
    298      1.4    provos 		panic("zsattach: could not establish soft interrupt");
    299      1.1  fredette 
    300      1.1  fredette 	evcnt_attach_dynamic(&zsc->zsc_intrcnt, EVCNT_TYPE_INTR, NULL,
    301      1.1  fredette 	    zsc->zsc_dev.dv_xname, "intr");
    302      1.1  fredette 
    303      1.1  fredette 
    304      1.1  fredette 	/*
    305      1.1  fredette 	 * Set the master interrupt enable and interrupt vector.
    306      1.1  fredette 	 * (common to both channels, do it on A)
    307      1.1  fredette 	 */
    308      1.1  fredette 	cs = zsc->zsc_cs[0];
    309      1.1  fredette 	s = splhigh();
    310      1.1  fredette 	/* interrupt vector */
    311      1.1  fredette 	zs_write_reg(cs, 2, zs_init_reg[2]);
    312      1.1  fredette 	/* master interrupt control (enable) */
    313      1.1  fredette 	zs_write_reg(cs, 9, zs_init_reg[9]);
    314      1.1  fredette 	splx(s);
    315      1.1  fredette 
    316      1.1  fredette }
    317      1.1  fredette 
    318  1.7.2.4     skrll static int
    319  1.7.2.4     skrll zs_print(void *aux, const char *name)
    320      1.1  fredette {
    321      1.1  fredette 	struct zsc_attach_args *args = aux;
    322      1.1  fredette 
    323      1.1  fredette 	if (name != NULL)
    324      1.6   thorpej 		aprint_normal("%s: ", name);
    325      1.1  fredette 
    326      1.1  fredette 	if (args->channel != -1)
    327      1.6   thorpej 		aprint_normal(" channel %d", args->channel);
    328      1.1  fredette 
    329      1.1  fredette 	return (UNCONF);
    330      1.1  fredette }
    331      1.1  fredette 
    332  1.7.2.4     skrll static int
    333  1.7.2.4     skrll zshard(void *arg)
    334      1.1  fredette {
    335      1.1  fredette 	struct zsc_softc *zsc = (struct zsc_softc *)arg;
    336      1.1  fredette 	int rr3, rval;
    337      1.1  fredette 
    338      1.1  fredette 	rval = 0;
    339      1.1  fredette 	while ((rr3 = zsc_intr_hard(zsc))) {
    340      1.1  fredette 		/* Count up the interrupts. */
    341      1.1  fredette 		rval |= rr3;
    342      1.1  fredette 		zsc->zsc_intrcnt.ev_count++;
    343      1.1  fredette 	}
    344      1.1  fredette 	if (((zsc->zsc_cs[0] && zsc->zsc_cs[0]->cs_softreq) ||
    345      1.1  fredette 	     (zsc->zsc_cs[1] && zsc->zsc_cs[1]->cs_softreq)) &&
    346      1.1  fredette 	    zsc->zsc_softintr) {
    347      1.1  fredette 		softintr_schedule(zsc->zsc_softintr);
    348      1.1  fredette 	}
    349      1.1  fredette 	return (rval);
    350      1.1  fredette }
    351      1.1  fredette 
    352  1.7.2.4     skrll int
    353  1.7.2.4     skrll zscheckintr(void *arg)
    354      1.1  fredette {
    355      1.1  fredette 	struct zsc_softc *zsc;
    356      1.1  fredette 	int unit, rval;
    357      1.1  fredette 
    358      1.1  fredette 	rval = 0;
    359      1.1  fredette 	for (unit = 0; unit < zs_cd.cd_ndevs; unit++) {
    360      1.1  fredette 
    361      1.1  fredette 		zsc = zs_cd.cd_devs[unit];
    362      1.1  fredette 		if (zsc == NULL)
    363      1.1  fredette 			continue;
    364      1.1  fredette 		rval = (zshard((void *)zsc) || rval);
    365      1.1  fredette 	}
    366      1.1  fredette 	return (rval);
    367      1.1  fredette }
    368      1.1  fredette 
    369      1.1  fredette 
    370      1.1  fredette /*
    371      1.1  fredette  * We need this only for TTY_DEBUG purposes.
    372      1.1  fredette  */
    373  1.7.2.4     skrll static void
    374  1.7.2.4     skrll zssoft(void *arg)
    375      1.1  fredette {
    376      1.1  fredette 	struct zsc_softc *zsc = (struct zsc_softc *)arg;
    377      1.1  fredette 	int s;
    378      1.1  fredette 
    379      1.1  fredette 	/* Make sure we call the tty layer at spltty. */
    380      1.1  fredette 	s = spltty();
    381      1.1  fredette 	(void)zsc_intr_soft(zsc);
    382      1.1  fredette #ifdef TTY_DEBUG
    383      1.1  fredette 	{
    384      1.1  fredette 		struct zstty_softc *zst0 = zsc->zsc_cs[0]->cs_private;
    385      1.1  fredette 		struct zstty_softc *zst1 = zsc->zsc_cs[1]->cs_private;
    386      1.1  fredette 		if (zst0->zst_overflows || zst1->zst_overflows ) {
    387      1.1  fredette 			struct trapframe *frame = (struct trapframe *)arg;
    388      1.1  fredette 
    389      1.1  fredette 			printf("zs silo overflow from %p\n",
    390      1.1  fredette 			       (long)frame->tf_pc);
    391      1.1  fredette 		}
    392      1.1  fredette 	}
    393      1.1  fredette #endif
    394      1.1  fredette 	splx(s);
    395      1.1  fredette }
    396      1.1  fredette 
    397      1.1  fredette 
    398      1.1  fredette /*
    399      1.1  fredette  * Compute the current baud rate given a ZS channel.
    400      1.1  fredette  */
    401  1.7.2.4     skrll static int
    402  1.7.2.4     skrll zs_get_speed(struct zs_chanstate *cs)
    403      1.1  fredette {
    404      1.1  fredette 	int tconst;
    405      1.1  fredette 
    406      1.1  fredette 	tconst = zs_read_reg(cs, 12);
    407      1.1  fredette 	tconst |= zs_read_reg(cs, 13) << 8;
    408      1.1  fredette 	return (TCONST_TO_BPS(cs->cs_brg_clk, tconst));
    409      1.1  fredette }
    410      1.1  fredette 
    411      1.1  fredette /*
    412      1.1  fredette  * MD functions for setting the baud rate and control modes.
    413      1.1  fredette  */
    414  1.7.2.4     skrll int
    415  1.7.2.4     skrll zs_set_speed(struct zs_chanstate *cs, int bps)
    416      1.1  fredette {
    417      1.1  fredette 	int tconst, real_bps;
    418      1.1  fredette 
    419      1.1  fredette 	if (bps == 0)
    420      1.1  fredette 		return (0);
    421      1.1  fredette 
    422      1.1  fredette #ifdef	DIAGNOSTIC
    423      1.1  fredette 	if (cs->cs_brg_clk == 0)
    424      1.1  fredette 		panic("zs_set_speed");
    425      1.1  fredette #endif
    426      1.1  fredette 
    427      1.1  fredette 	tconst = BPS_TO_TCONST(cs->cs_brg_clk, bps);
    428      1.1  fredette 	if (tconst < 0)
    429      1.1  fredette 		return (EINVAL);
    430      1.1  fredette 
    431      1.1  fredette 	/* Convert back to make sure we can do it. */
    432      1.1  fredette 	real_bps = TCONST_TO_BPS(cs->cs_brg_clk, tconst);
    433      1.1  fredette 
    434      1.1  fredette 	/* XXX - Allow some tolerance here? */
    435      1.1  fredette 	if (real_bps != bps)
    436      1.1  fredette 		return (EINVAL);
    437      1.1  fredette 
    438      1.1  fredette 	cs->cs_preg[12] = tconst;
    439      1.1  fredette 	cs->cs_preg[13] = tconst >> 8;
    440      1.1  fredette 
    441      1.1  fredette 	/* Caller will stuff the pending registers. */
    442      1.1  fredette 	return (0);
    443      1.1  fredette }
    444      1.1  fredette 
    445  1.7.2.4     skrll int
    446  1.7.2.4     skrll zs_set_modes(struct zs_chanstate *cs, int cflag	/* bits per second */)
    447      1.1  fredette {
    448      1.1  fredette 	int s;
    449      1.1  fredette 
    450      1.1  fredette 	/*
    451      1.1  fredette 	 * Output hardware flow control on the chip is horrendous:
    452      1.1  fredette 	 * if carrier detect drops, the receiver is disabled, and if
    453      1.1  fredette 	 * CTS drops, the transmitter is stoped IN MID CHARACTER!
    454      1.1  fredette 	 * Therefore, NEVER set the HFC bit, and instead use the
    455      1.1  fredette 	 * status interrupt to detect CTS changes.
    456      1.1  fredette 	 */
    457      1.1  fredette 	s = splzs();
    458      1.1  fredette 	cs->cs_rr0_pps = 0;
    459      1.1  fredette 	if ((cflag & (CLOCAL | MDMBUF)) != 0) {
    460      1.1  fredette 		cs->cs_rr0_dcd = 0;
    461      1.1  fredette 		if ((cflag & MDMBUF) == 0)
    462      1.1  fredette 			cs->cs_rr0_pps = ZSRR0_DCD;
    463      1.1  fredette 	} else
    464      1.1  fredette 		cs->cs_rr0_dcd = ZSRR0_DCD;
    465      1.1  fredette 	if ((cflag & CRTSCTS) != 0) {
    466      1.1  fredette 		cs->cs_wr5_dtr = ZSWR5_DTR;
    467      1.1  fredette 		cs->cs_wr5_rts = ZSWR5_RTS;
    468      1.1  fredette 		cs->cs_rr0_cts = ZSRR0_CTS;
    469      1.1  fredette 	} else if ((cflag & CDTRCTS) != 0) {
    470      1.1  fredette 		cs->cs_wr5_dtr = 0;
    471      1.1  fredette 		cs->cs_wr5_rts = ZSWR5_DTR;
    472      1.1  fredette 		cs->cs_rr0_cts = ZSRR0_CTS;
    473      1.1  fredette 	} else if ((cflag & MDMBUF) != 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_DCD;
    477      1.1  fredette 	} else {
    478      1.1  fredette 		cs->cs_wr5_dtr = ZSWR5_DTR | ZSWR5_RTS;
    479      1.1  fredette 		cs->cs_wr5_rts = 0;
    480      1.1  fredette 		cs->cs_rr0_cts = 0;
    481      1.1  fredette 	}
    482      1.1  fredette 	splx(s);
    483      1.1  fredette 
    484      1.1  fredette 	/* Caller will stuff the pending registers. */
    485      1.1  fredette 	return (0);
    486      1.1  fredette }
    487      1.1  fredette 
    488      1.1  fredette 
    489      1.1  fredette /*
    490      1.1  fredette  * Read or write the chip with suitable delays.
    491      1.1  fredette  */
    492      1.1  fredette 
    493      1.1  fredette u_char
    494  1.7.2.4     skrll zs_read_reg(struct zs_chanstate *cs, u_char reg)
    495      1.1  fredette {
    496      1.1  fredette 	u_char val;
    497      1.1  fredette 
    498      1.1  fredette 	*cs->cs_reg_csr = reg;
    499      1.1  fredette 	ZS_DELAY();
    500      1.1  fredette 	val = *cs->cs_reg_csr;
    501      1.1  fredette 	ZS_DELAY();
    502      1.1  fredette 	return (val);
    503      1.1  fredette }
    504      1.1  fredette 
    505      1.1  fredette void
    506  1.7.2.4     skrll zs_write_reg(struct zs_chanstate *cs, u_char reg, u_char val)
    507      1.1  fredette {
    508      1.1  fredette 	*cs->cs_reg_csr = reg;
    509      1.1  fredette 	ZS_DELAY();
    510      1.1  fredette 	*cs->cs_reg_csr = val;
    511      1.1  fredette 	ZS_DELAY();
    512      1.1  fredette }
    513      1.1  fredette 
    514      1.1  fredette u_char
    515  1.7.2.4     skrll zs_read_csr(struct zs_chanstate *cs)
    516      1.1  fredette {
    517      1.1  fredette 	u_char val;
    518      1.1  fredette 
    519      1.1  fredette 	val = *cs->cs_reg_csr;
    520      1.1  fredette 	ZS_DELAY();
    521      1.1  fredette 	return (val);
    522      1.1  fredette }
    523      1.1  fredette 
    524  1.7.2.4     skrll void
    525  1.7.2.4     skrll zs_write_csr(struct zs_chanstate *cs, u_char val)
    526      1.1  fredette {
    527      1.1  fredette 	*cs->cs_reg_csr = val;
    528      1.1  fredette 	ZS_DELAY();
    529      1.1  fredette }
    530      1.1  fredette 
    531  1.7.2.4     skrll u_char
    532  1.7.2.4     skrll zs_read_data(struct zs_chanstate *cs)
    533      1.1  fredette {
    534      1.1  fredette 	u_char val;
    535      1.1  fredette 
    536      1.1  fredette 	val = *cs->cs_reg_data;
    537      1.1  fredette 	ZS_DELAY();
    538      1.1  fredette 	return (val);
    539      1.1  fredette }
    540      1.1  fredette 
    541  1.7.2.4     skrll void
    542  1.7.2.4     skrll zs_write_data(struct zs_chanstate *cs, u_char val)
    543      1.1  fredette {
    544      1.1  fredette 	*cs->cs_reg_data = val;
    545      1.1  fredette 	ZS_DELAY();
    546      1.1  fredette }
    547      1.1  fredette 
    548      1.1  fredette /****************************************************************
    549      1.1  fredette  * Console support functions (Sun specific!)
    550      1.1  fredette  * Note: this code is allowed to know about the layout of
    551      1.1  fredette  * the chip registers, and uses that to keep things simple.
    552      1.1  fredette  * XXX - I think I like the mvme167 code better. -gwr
    553      1.1  fredette  ****************************************************************/
    554      1.1  fredette 
    555  1.7.2.4     skrll extern void Debugger(void);
    556      1.1  fredette 
    557      1.1  fredette /*
    558      1.1  fredette  * Handle user request to enter kernel debugger.
    559      1.1  fredette  */
    560  1.7.2.4     skrll void
    561  1.7.2.4     skrll zs_abort(struct zs_chanstate *cs)
    562      1.1  fredette {
    563      1.1  fredette 	volatile struct zschan *zc = zs_conschan_get;
    564      1.1  fredette 	int rr0;
    565      1.1  fredette 
    566      1.1  fredette 	/* Wait for end of break to avoid PROM abort. */
    567      1.1  fredette 	/* XXX - Limit the wait? */
    568      1.1  fredette 	do {
    569      1.1  fredette 		rr0 = zc->zc_csr;
    570      1.1  fredette 		ZS_DELAY();
    571      1.1  fredette 	} while (rr0 & ZSRR0_BREAK);
    572      1.1  fredette 
    573      1.1  fredette #if defined(KGDB)
    574      1.1  fredette 	zskgdb(cs);
    575      1.1  fredette #elif defined(DDB)
    576      1.1  fredette 	{
    577      1.1  fredette 		extern int db_active;
    578      1.1  fredette 
    579      1.1  fredette 		if (!db_active)
    580      1.1  fredette 			Debugger();
    581      1.1  fredette 		else
    582      1.1  fredette 			/* Debugger is probably hozed */
    583      1.1  fredette 			callrom();
    584      1.1  fredette 	}
    585      1.1  fredette #else
    586      1.1  fredette 	printf("stopping on keyboard abort\n");
    587      1.1  fredette 	callrom();
    588      1.1  fredette #endif
    589      1.1  fredette }
    590      1.1  fredette 
    591      1.1  fredette 
    592      1.1  fredette /*
    593      1.1  fredette  * Polled input char.
    594      1.1  fredette  */
    595  1.7.2.4     skrll int
    596  1.7.2.4     skrll zs_getc(void *arg)
    597      1.1  fredette {
    598      1.1  fredette 	volatile struct zschan *zc = arg;
    599      1.1  fredette 	int s, c, rr0;
    600      1.1  fredette 
    601      1.1  fredette 	s = splhigh();
    602      1.1  fredette 	/* Wait for a character to arrive. */
    603      1.1  fredette 	do {
    604      1.1  fredette 		rr0 = zc->zc_csr;
    605      1.1  fredette 		ZS_DELAY();
    606      1.1  fredette 	} while ((rr0 & ZSRR0_RX_READY) == 0);
    607      1.1  fredette 
    608      1.1  fredette 	c = zc->zc_data;
    609      1.1  fredette 	ZS_DELAY();
    610      1.1  fredette 	splx(s);
    611      1.1  fredette 
    612      1.1  fredette 	/*
    613      1.1  fredette 	 * This is used by the kd driver to read scan codes,
    614      1.1  fredette 	 * so don't translate '\r' ==> '\n' here...
    615      1.1  fredette 	 */
    616      1.1  fredette 	return (c);
    617      1.1  fredette }
    618      1.1  fredette 
    619      1.1  fredette /*
    620      1.1  fredette  * Polled output char.
    621      1.1  fredette  */
    622  1.7.2.4     skrll void
    623  1.7.2.4     skrll zs_putc(void *arg, int c)
    624      1.1  fredette {
    625      1.1  fredette 	volatile struct zschan *zc = arg;
    626      1.1  fredette 	int s, rr0;
    627      1.1  fredette 
    628      1.1  fredette 	s = splhigh();
    629      1.1  fredette 
    630      1.1  fredette 	/* Wait for transmitter to become ready. */
    631      1.1  fredette 	do {
    632      1.1  fredette 		rr0 = zc->zc_csr;
    633      1.1  fredette 		ZS_DELAY();
    634      1.1  fredette 	} while ((rr0 & ZSRR0_TX_READY) == 0);
    635      1.1  fredette 
    636      1.1  fredette 	/*
    637      1.1  fredette 	 * Send the next character.
    638      1.1  fredette 	 * Now you'd think that this could be followed by a ZS_DELAY()
    639      1.1  fredette 	 * just like all the other chip accesses, but it turns out that
    640      1.1  fredette 	 * the `transmit-ready' interrupt isn't de-asserted until
    641      1.1  fredette 	 * some period of time after the register write completes
    642      1.1  fredette 	 * (more than a couple instructions).  So to avoid stray
    643  1.7.2.1     skrll 	 * interrupts we put in the 2us delay regardless of CPU model.
    644      1.1  fredette 	 */
    645      1.1  fredette 	zc->zc_data = c;
    646      1.1  fredette 	delay(2);
    647      1.1  fredette 
    648      1.1  fredette 	splx(s);
    649      1.1  fredette }
    650      1.1  fredette 
    651      1.1  fredette /*****************************************************************/
    652      1.1  fredette 
    653      1.1  fredette 
    654      1.1  fredette 
    655      1.1  fredette 
    656      1.1  fredette /*
    657      1.1  fredette  * Polled console input putchar.
    658      1.1  fredette  */
    659  1.7.2.4     skrll static int
    660  1.7.2.4     skrll zscngetc(dev_t dev)
    661      1.1  fredette {
    662      1.1  fredette 	return (zs_getc(zs_conschan_get));
    663      1.1  fredette }
    664      1.1  fredette 
    665      1.1  fredette /*
    666      1.1  fredette  * Polled console output putchar.
    667      1.1  fredette  */
    668  1.7.2.4     skrll static void
    669  1.7.2.4     skrll zscnputc(dev_t dev, int c)
    670      1.1  fredette {
    671      1.1  fredette 	zs_putc(zs_conschan_put, c);
    672      1.1  fredette }
    673      1.1  fredette 
    674      1.1  fredette int swallow_zsintrs;
    675      1.1  fredette 
    676  1.7.2.4     skrll static void
    677  1.7.2.4     skrll zscnpollc(dev_t dev, int on)
    678      1.1  fredette {
    679      1.1  fredette 	/*
    680      1.1  fredette 	 * Need to tell zs driver to acknowledge all interrupts or we get
    681      1.1  fredette 	 * annoying spurious interrupt messages.  This is because mucking
    682      1.1  fredette 	 * with spl() levels during polling does not prevent interrupts from
    683      1.1  fredette 	 * being generated.
    684      1.1  fredette 	 */
    685      1.1  fredette 
    686      1.1  fredette 	if (on) swallow_zsintrs++;
    687      1.1  fredette 	else swallow_zsintrs--;
    688      1.1  fredette }
    689      1.1  fredette 
    690