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zs.c revision 1.13.4.1
      1  1.13.4.1     rmind /*	$NetBSD: zs.c,v 1.13.4.1 2007/03/12 05:51:03 rmind 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  1.13.4.1     rmind __KERNEL_RCSID(0, "$NetBSD: zs.c,v 1.13.4.1 2007/03/12 05:51:03 rmind 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       1.1  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      1.10       chs static int  zscngetc(dev_t);
    121      1.10       chs static void zscnputc(dev_t, int);
    122      1.10       chs 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      1.10       chs 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      1.10       chs int zscheckintr(void *);
    144      1.10       chs static int zshard(void *);
    145      1.10       chs static void zssoft(void *);
    146       1.1  fredette 
    147      1.10       chs 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      1.10       chs void
    156      1.10       chs 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  1.13.4.1     rmind 	/* we should use ipl2si(softpri) but it isn't exported */
    168  1.13.4.1     rmind 	printf(" softpri %d\n", _IPL_SOFT_LEVEL3);
    169       1.1  fredette 
    170       1.1  fredette 	/*
    171       1.1  fredette 	 * Initialize software state for each channel.
    172       1.1  fredette 	 */
    173       1.1  fredette 	for (channel = 0; channel < 2; channel++) {
    174       1.1  fredette 		struct zschan *zc;
    175       1.1  fredette 		struct device *child;
    176       1.1  fredette 
    177       1.1  fredette 		zsc_args.channel = channel;
    178       1.1  fredette 		cs = &zsc->zsc_cs_store[channel];
    179       1.1  fredette 		zsc->zsc_cs[channel] = cs;
    180       1.1  fredette 
    181       1.7        pk 		simple_lock_init(&cs->cs_lock);
    182       1.1  fredette 		cs->cs_channel = channel;
    183       1.1  fredette 		cs->cs_private = NULL;
    184       1.1  fredette 		cs->cs_ops = &zsops_null;
    185       1.1  fredette 		cs->cs_brg_clk = PCLK / 16;
    186       1.1  fredette 
    187       1.1  fredette 		zc = (channel == 0) ? &zsd->zs_chan_a : &zsd->zs_chan_b;
    188       1.1  fredette 
    189       1.1  fredette 		zsc_args.consdev = NULL;
    190       1.1  fredette 		zsc_args.hwflags = zs_console_flags(zsc->zsc_promunit,
    191       1.1  fredette 						    zsc->zsc_node,
    192       1.1  fredette 						    channel);
    193       1.1  fredette 
    194       1.1  fredette 		if (zsc_args.hwflags & ZS_HWFLAG_CONSOLE) {
    195       1.1  fredette 			zsc_args.hwflags |= ZS_HWFLAG_USE_CONSDEV;
    196       1.1  fredette 			zsc_args.consdev = &zs_consdev;
    197       1.1  fredette 		}
    198       1.1  fredette 
    199       1.1  fredette 		if ((zsc_args.hwflags & ZS_HWFLAG_CONSOLE_INPUT) != 0) {
    200       1.1  fredette 			zs_conschan_get = zc;
    201       1.1  fredette 		}
    202       1.1  fredette 		if ((zsc_args.hwflags & ZS_HWFLAG_CONSOLE_OUTPUT) != 0) {
    203       1.1  fredette 			zs_conschan_put = zc;
    204       1.1  fredette 		}
    205       1.1  fredette 
    206       1.1  fredette 		/* Children need to set cn_dev, etc */
    207       1.1  fredette 		cs->cs_reg_csr  = &zc->zc_csr;
    208       1.1  fredette 		cs->cs_reg_data = &zc->zc_data;
    209       1.1  fredette 
    210       1.5  fredette 		memcpy(cs->cs_creg, zs_init_reg, 16);
    211       1.5  fredette 		memcpy(cs->cs_preg, zs_init_reg, 16);
    212       1.1  fredette 
    213       1.1  fredette 		/* XXX: Consult PROM properties for this?! */
    214       1.1  fredette 		cs->cs_defspeed = zs_get_speed(cs);
    215       1.1  fredette 		cs->cs_defcflag = zs_def_cflag;
    216       1.1  fredette 
    217       1.1  fredette 		/* Make these correspond to cs_defcflag (-crtscts) */
    218       1.1  fredette 		cs->cs_rr0_dcd = ZSRR0_DCD;
    219       1.1  fredette 		cs->cs_rr0_cts = 0;
    220       1.1  fredette 		cs->cs_wr5_dtr = ZSWR5_DTR | ZSWR5_RTS;
    221       1.1  fredette 		cs->cs_wr5_rts = 0;
    222       1.1  fredette 
    223       1.1  fredette 		/*
    224       1.1  fredette 		 * Clear the master interrupt enable.
    225       1.1  fredette 		 * The INTENA is common to both channels,
    226       1.1  fredette 		 * so just do it on the A channel.
    227       1.1  fredette 		 */
    228       1.1  fredette 		if (channel == 0) {
    229       1.1  fredette 			zs_write_reg(cs, 9, 0);
    230       1.1  fredette 		}
    231       1.1  fredette 
    232       1.1  fredette 		/*
    233       1.1  fredette 		 * Look for a child driver for this channel.
    234       1.1  fredette 		 * The child attach will setup the hardware.
    235       1.1  fredette 		 */
    236       1.1  fredette 		if (!(child =
    237       1.1  fredette 		      config_found(&zsc->zsc_dev, (void *)&zsc_args, zs_print))) {
    238       1.1  fredette 			/* No sub-driver.  Just reset it. */
    239       1.1  fredette 			u_char reset = (channel == 0) ?
    240       1.1  fredette 				ZSWR9_A_RESET : ZSWR9_B_RESET;
    241       1.1  fredette 			s = splzs();
    242       1.1  fredette 			zs_write_reg(cs,  9, reset);
    243       1.1  fredette 			splx(s);
    244       1.1  fredette 		}
    245       1.1  fredette #if (NKBD > 0) || (NMS > 0)
    246       1.1  fredette 		/*
    247       1.1  fredette 		 * If this was a zstty it has a keyboard
    248       1.1  fredette 		 * property on it we need to attach the
    249       1.1  fredette 		 * sunkbd and sunms line disciplines.
    250       1.1  fredette 		 */
    251       1.1  fredette 		if (child
    252      1.12   thorpej 		    && device_is_a(child, "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      1.13   tsutsui 	 * Now safe to install interrupt handlers.
    293       1.1  fredette 	 */
    294       1.1  fredette 	bus_intr_establish(zsc->zsc_bustag, pri, IPL_SERIAL, 0, zshard, zsc);
    295       1.1  fredette 	if (!(zsc->zsc_softintr = softintr_establish(softpri, zssoft, zsc)))
    296       1.4    provos 		panic("zsattach: could not establish soft interrupt");
    297       1.1  fredette 
    298       1.1  fredette 	evcnt_attach_dynamic(&zsc->zsc_intrcnt, EVCNT_TYPE_INTR, NULL,
    299       1.1  fredette 	    zsc->zsc_dev.dv_xname, "intr");
    300       1.1  fredette 
    301       1.1  fredette 
    302       1.1  fredette 	/*
    303       1.1  fredette 	 * Set the master interrupt enable and interrupt vector.
    304       1.1  fredette 	 * (common to both channels, do it on A)
    305       1.1  fredette 	 */
    306       1.1  fredette 	cs = zsc->zsc_cs[0];
    307       1.1  fredette 	s = splhigh();
    308       1.1  fredette 	/* interrupt vector */
    309       1.1  fredette 	zs_write_reg(cs, 2, zs_init_reg[2]);
    310       1.1  fredette 	/* master interrupt control (enable) */
    311       1.1  fredette 	zs_write_reg(cs, 9, zs_init_reg[9]);
    312       1.1  fredette 	splx(s);
    313       1.1  fredette 
    314       1.1  fredette }
    315       1.1  fredette 
    316      1.10       chs static int
    317      1.10       chs zs_print(void *aux, const char *name)
    318       1.1  fredette {
    319       1.1  fredette 	struct zsc_attach_args *args = aux;
    320       1.1  fredette 
    321       1.1  fredette 	if (name != NULL)
    322       1.6   thorpej 		aprint_normal("%s: ", name);
    323       1.1  fredette 
    324       1.1  fredette 	if (args->channel != -1)
    325       1.6   thorpej 		aprint_normal(" channel %d", args->channel);
    326       1.1  fredette 
    327       1.1  fredette 	return (UNCONF);
    328       1.1  fredette }
    329       1.1  fredette 
    330      1.10       chs static int
    331      1.10       chs zshard(void *arg)
    332       1.1  fredette {
    333       1.1  fredette 	struct zsc_softc *zsc = (struct zsc_softc *)arg;
    334       1.1  fredette 	int rr3, rval;
    335       1.1  fredette 
    336       1.1  fredette 	rval = 0;
    337       1.1  fredette 	while ((rr3 = zsc_intr_hard(zsc))) {
    338       1.1  fredette 		/* Count up the interrupts. */
    339       1.1  fredette 		rval |= rr3;
    340       1.1  fredette 		zsc->zsc_intrcnt.ev_count++;
    341       1.1  fredette 	}
    342       1.1  fredette 	if (((zsc->zsc_cs[0] && zsc->zsc_cs[0]->cs_softreq) ||
    343       1.1  fredette 	     (zsc->zsc_cs[1] && zsc->zsc_cs[1]->cs_softreq)) &&
    344       1.1  fredette 	    zsc->zsc_softintr) {
    345       1.1  fredette 		softintr_schedule(zsc->zsc_softintr);
    346       1.1  fredette 	}
    347       1.1  fredette 	return (rval);
    348       1.1  fredette }
    349       1.1  fredette 
    350      1.10       chs int
    351      1.10       chs zscheckintr(void *arg)
    352       1.1  fredette {
    353       1.1  fredette 	struct zsc_softc *zsc;
    354       1.1  fredette 	int unit, rval;
    355       1.1  fredette 
    356       1.1  fredette 	rval = 0;
    357       1.1  fredette 	for (unit = 0; unit < zs_cd.cd_ndevs; unit++) {
    358       1.1  fredette 
    359       1.1  fredette 		zsc = zs_cd.cd_devs[unit];
    360       1.1  fredette 		if (zsc == NULL)
    361       1.1  fredette 			continue;
    362       1.1  fredette 		rval = (zshard((void *)zsc) || rval);
    363       1.1  fredette 	}
    364       1.1  fredette 	return (rval);
    365       1.1  fredette }
    366       1.1  fredette 
    367       1.1  fredette 
    368       1.1  fredette /*
    369       1.1  fredette  * We need this only for TTY_DEBUG purposes.
    370       1.1  fredette  */
    371      1.10       chs static void
    372      1.10       chs zssoft(void *arg)
    373       1.1  fredette {
    374       1.1  fredette 	struct zsc_softc *zsc = (struct zsc_softc *)arg;
    375       1.1  fredette 	int s;
    376       1.1  fredette 
    377       1.1  fredette 	/* Make sure we call the tty layer at spltty. */
    378       1.1  fredette 	s = spltty();
    379       1.1  fredette 	(void)zsc_intr_soft(zsc);
    380       1.1  fredette #ifdef TTY_DEBUG
    381       1.1  fredette 	{
    382       1.1  fredette 		struct zstty_softc *zst0 = zsc->zsc_cs[0]->cs_private;
    383       1.1  fredette 		struct zstty_softc *zst1 = zsc->zsc_cs[1]->cs_private;
    384       1.1  fredette 		if (zst0->zst_overflows || zst1->zst_overflows ) {
    385       1.1  fredette 			struct trapframe *frame = (struct trapframe *)arg;
    386       1.1  fredette 
    387       1.1  fredette 			printf("zs silo overflow from %p\n",
    388       1.1  fredette 			       (long)frame->tf_pc);
    389       1.1  fredette 		}
    390       1.1  fredette 	}
    391       1.1  fredette #endif
    392       1.1  fredette 	splx(s);
    393       1.1  fredette }
    394       1.1  fredette 
    395       1.1  fredette 
    396       1.1  fredette /*
    397       1.1  fredette  * Compute the current baud rate given a ZS channel.
    398       1.1  fredette  */
    399      1.10       chs static int
    400      1.10       chs zs_get_speed(struct zs_chanstate *cs)
    401       1.1  fredette {
    402       1.1  fredette 	int tconst;
    403       1.1  fredette 
    404       1.1  fredette 	tconst = zs_read_reg(cs, 12);
    405       1.1  fredette 	tconst |= zs_read_reg(cs, 13) << 8;
    406       1.1  fredette 	return (TCONST_TO_BPS(cs->cs_brg_clk, tconst));
    407       1.1  fredette }
    408       1.1  fredette 
    409       1.1  fredette /*
    410       1.1  fredette  * MD functions for setting the baud rate and control modes.
    411       1.1  fredette  */
    412      1.10       chs int
    413      1.10       chs zs_set_speed(struct zs_chanstate *cs, int bps)
    414       1.1  fredette {
    415       1.1  fredette 	int tconst, real_bps;
    416       1.1  fredette 
    417       1.1  fredette 	if (bps == 0)
    418       1.1  fredette 		return (0);
    419       1.1  fredette 
    420       1.1  fredette #ifdef	DIAGNOSTIC
    421       1.1  fredette 	if (cs->cs_brg_clk == 0)
    422       1.1  fredette 		panic("zs_set_speed");
    423       1.1  fredette #endif
    424       1.1  fredette 
    425       1.1  fredette 	tconst = BPS_TO_TCONST(cs->cs_brg_clk, bps);
    426       1.1  fredette 	if (tconst < 0)
    427       1.1  fredette 		return (EINVAL);
    428       1.1  fredette 
    429       1.1  fredette 	/* Convert back to make sure we can do it. */
    430       1.1  fredette 	real_bps = TCONST_TO_BPS(cs->cs_brg_clk, tconst);
    431       1.1  fredette 
    432       1.1  fredette 	/* XXX - Allow some tolerance here? */
    433       1.1  fredette 	if (real_bps != bps)
    434       1.1  fredette 		return (EINVAL);
    435       1.1  fredette 
    436       1.1  fredette 	cs->cs_preg[12] = tconst;
    437       1.1  fredette 	cs->cs_preg[13] = tconst >> 8;
    438       1.1  fredette 
    439       1.1  fredette 	/* Caller will stuff the pending registers. */
    440       1.1  fredette 	return (0);
    441       1.1  fredette }
    442       1.1  fredette 
    443      1.10       chs int
    444      1.10       chs zs_set_modes(struct zs_chanstate *cs, int cflag	/* bits per second */)
    445       1.1  fredette {
    446       1.1  fredette 	int s;
    447       1.1  fredette 
    448       1.1  fredette 	/*
    449       1.1  fredette 	 * Output hardware flow control on the chip is horrendous:
    450       1.1  fredette 	 * if carrier detect drops, the receiver is disabled, and if
    451       1.1  fredette 	 * CTS drops, the transmitter is stoped IN MID CHARACTER!
    452       1.1  fredette 	 * Therefore, NEVER set the HFC bit, and instead use the
    453       1.1  fredette 	 * status interrupt to detect CTS changes.
    454       1.1  fredette 	 */
    455       1.1  fredette 	s = splzs();
    456       1.1  fredette 	cs->cs_rr0_pps = 0;
    457       1.1  fredette 	if ((cflag & (CLOCAL | MDMBUF)) != 0) {
    458       1.1  fredette 		cs->cs_rr0_dcd = 0;
    459       1.1  fredette 		if ((cflag & MDMBUF) == 0)
    460       1.1  fredette 			cs->cs_rr0_pps = ZSRR0_DCD;
    461       1.1  fredette 	} else
    462       1.1  fredette 		cs->cs_rr0_dcd = ZSRR0_DCD;
    463       1.1  fredette 	if ((cflag & CRTSCTS) != 0) {
    464       1.1  fredette 		cs->cs_wr5_dtr = ZSWR5_DTR;
    465       1.1  fredette 		cs->cs_wr5_rts = ZSWR5_RTS;
    466       1.1  fredette 		cs->cs_rr0_cts = ZSRR0_CTS;
    467       1.1  fredette 	} else if ((cflag & CDTRCTS) != 0) {
    468       1.1  fredette 		cs->cs_wr5_dtr = 0;
    469       1.1  fredette 		cs->cs_wr5_rts = ZSWR5_DTR;
    470       1.1  fredette 		cs->cs_rr0_cts = ZSRR0_CTS;
    471       1.1  fredette 	} else if ((cflag & MDMBUF) != 0) {
    472       1.1  fredette 		cs->cs_wr5_dtr = 0;
    473       1.1  fredette 		cs->cs_wr5_rts = ZSWR5_DTR;
    474       1.1  fredette 		cs->cs_rr0_cts = ZSRR0_DCD;
    475       1.1  fredette 	} else {
    476       1.1  fredette 		cs->cs_wr5_dtr = ZSWR5_DTR | ZSWR5_RTS;
    477       1.1  fredette 		cs->cs_wr5_rts = 0;
    478       1.1  fredette 		cs->cs_rr0_cts = 0;
    479       1.1  fredette 	}
    480       1.1  fredette 	splx(s);
    481       1.1  fredette 
    482       1.1  fredette 	/* Caller will stuff the pending registers. */
    483       1.1  fredette 	return (0);
    484       1.1  fredette }
    485       1.1  fredette 
    486       1.1  fredette 
    487       1.1  fredette /*
    488       1.1  fredette  * Read or write the chip with suitable delays.
    489       1.1  fredette  */
    490       1.1  fredette 
    491       1.1  fredette u_char
    492      1.10       chs zs_read_reg(struct zs_chanstate *cs, u_char reg)
    493       1.1  fredette {
    494       1.1  fredette 	u_char val;
    495       1.1  fredette 
    496       1.1  fredette 	*cs->cs_reg_csr = reg;
    497       1.1  fredette 	ZS_DELAY();
    498       1.1  fredette 	val = *cs->cs_reg_csr;
    499       1.1  fredette 	ZS_DELAY();
    500       1.1  fredette 	return (val);
    501       1.1  fredette }
    502       1.1  fredette 
    503       1.1  fredette void
    504      1.10       chs zs_write_reg(struct zs_chanstate *cs, u_char reg, u_char val)
    505       1.1  fredette {
    506       1.1  fredette 	*cs->cs_reg_csr = reg;
    507       1.1  fredette 	ZS_DELAY();
    508       1.1  fredette 	*cs->cs_reg_csr = val;
    509       1.1  fredette 	ZS_DELAY();
    510       1.1  fredette }
    511       1.1  fredette 
    512       1.1  fredette u_char
    513      1.10       chs zs_read_csr(struct zs_chanstate *cs)
    514       1.1  fredette {
    515       1.1  fredette 	u_char val;
    516       1.1  fredette 
    517       1.1  fredette 	val = *cs->cs_reg_csr;
    518       1.1  fredette 	ZS_DELAY();
    519       1.1  fredette 	return (val);
    520       1.1  fredette }
    521       1.1  fredette 
    522      1.10       chs void
    523      1.10       chs zs_write_csr(struct zs_chanstate *cs, u_char val)
    524       1.1  fredette {
    525       1.1  fredette 	*cs->cs_reg_csr = val;
    526       1.1  fredette 	ZS_DELAY();
    527       1.1  fredette }
    528       1.1  fredette 
    529      1.10       chs u_char
    530      1.10       chs zs_read_data(struct zs_chanstate *cs)
    531       1.1  fredette {
    532       1.1  fredette 	u_char val;
    533       1.1  fredette 
    534       1.1  fredette 	val = *cs->cs_reg_data;
    535       1.1  fredette 	ZS_DELAY();
    536       1.1  fredette 	return (val);
    537       1.1  fredette }
    538       1.1  fredette 
    539      1.10       chs void
    540      1.10       chs zs_write_data(struct zs_chanstate *cs, u_char val)
    541       1.1  fredette {
    542       1.1  fredette 	*cs->cs_reg_data = val;
    543       1.1  fredette 	ZS_DELAY();
    544       1.1  fredette }
    545       1.1  fredette 
    546       1.1  fredette /****************************************************************
    547       1.1  fredette  * Console support functions (Sun specific!)
    548       1.1  fredette  * Note: this code is allowed to know about the layout of
    549       1.1  fredette  * the chip registers, and uses that to keep things simple.
    550       1.1  fredette  * XXX - I think I like the mvme167 code better. -gwr
    551       1.1  fredette  ****************************************************************/
    552       1.1  fredette 
    553      1.10       chs extern void Debugger(void);
    554       1.1  fredette 
    555       1.1  fredette /*
    556       1.1  fredette  * Handle user request to enter kernel debugger.
    557       1.1  fredette  */
    558      1.10       chs void
    559      1.10       chs zs_abort(struct zs_chanstate *cs)
    560       1.1  fredette {
    561       1.1  fredette 	volatile struct zschan *zc = zs_conschan_get;
    562       1.1  fredette 	int rr0;
    563       1.1  fredette 
    564       1.1  fredette 	/* Wait for end of break to avoid PROM abort. */
    565       1.1  fredette 	/* XXX - Limit the wait? */
    566       1.1  fredette 	do {
    567       1.1  fredette 		rr0 = zc->zc_csr;
    568       1.1  fredette 		ZS_DELAY();
    569       1.1  fredette 	} while (rr0 & ZSRR0_BREAK);
    570       1.1  fredette 
    571       1.1  fredette #if defined(KGDB)
    572       1.1  fredette 	zskgdb(cs);
    573       1.1  fredette #elif defined(DDB)
    574       1.1  fredette 	{
    575       1.1  fredette 		extern int db_active;
    576       1.1  fredette 
    577       1.1  fredette 		if (!db_active)
    578       1.1  fredette 			Debugger();
    579       1.1  fredette 		else
    580       1.1  fredette 			/* Debugger is probably hozed */
    581       1.1  fredette 			callrom();
    582       1.1  fredette 	}
    583       1.1  fredette #else
    584       1.1  fredette 	printf("stopping on keyboard abort\n");
    585       1.1  fredette 	callrom();
    586       1.1  fredette #endif
    587       1.1  fredette }
    588       1.1  fredette 
    589       1.1  fredette 
    590       1.1  fredette /*
    591       1.1  fredette  * Polled input char.
    592       1.1  fredette  */
    593      1.10       chs int
    594      1.10       chs zs_getc(void *arg)
    595       1.1  fredette {
    596       1.1  fredette 	volatile struct zschan *zc = arg;
    597       1.1  fredette 	int s, c, rr0;
    598       1.1  fredette 
    599       1.1  fredette 	s = splhigh();
    600       1.1  fredette 	/* Wait for a character to arrive. */
    601       1.1  fredette 	do {
    602       1.1  fredette 		rr0 = zc->zc_csr;
    603       1.1  fredette 		ZS_DELAY();
    604       1.1  fredette 	} while ((rr0 & ZSRR0_RX_READY) == 0);
    605       1.1  fredette 
    606       1.1  fredette 	c = zc->zc_data;
    607       1.1  fredette 	ZS_DELAY();
    608       1.1  fredette 	splx(s);
    609       1.1  fredette 
    610       1.1  fredette 	/*
    611       1.1  fredette 	 * This is used by the kd driver to read scan codes,
    612       1.1  fredette 	 * so don't translate '\r' ==> '\n' here...
    613       1.1  fredette 	 */
    614       1.1  fredette 	return (c);
    615       1.1  fredette }
    616       1.1  fredette 
    617       1.1  fredette /*
    618       1.1  fredette  * Polled output char.
    619       1.1  fredette  */
    620      1.10       chs void
    621      1.10       chs zs_putc(void *arg, int c)
    622       1.1  fredette {
    623       1.1  fredette 	volatile struct zschan *zc = arg;
    624       1.1  fredette 	int s, rr0;
    625       1.1  fredette 
    626       1.1  fredette 	s = splhigh();
    627       1.1  fredette 
    628       1.1  fredette 	/* Wait for transmitter to become ready. */
    629       1.1  fredette 	do {
    630       1.1  fredette 		rr0 = zc->zc_csr;
    631       1.1  fredette 		ZS_DELAY();
    632       1.1  fredette 	} while ((rr0 & ZSRR0_TX_READY) == 0);
    633       1.1  fredette 
    634       1.1  fredette 	/*
    635       1.1  fredette 	 * Send the next character.
    636       1.1  fredette 	 * Now you'd think that this could be followed by a ZS_DELAY()
    637       1.1  fredette 	 * just like all the other chip accesses, but it turns out that
    638       1.1  fredette 	 * the `transmit-ready' interrupt isn't de-asserted until
    639       1.1  fredette 	 * some period of time after the register write completes
    640       1.1  fredette 	 * (more than a couple instructions).  So to avoid stray
    641       1.9       wiz 	 * interrupts we put in the 2us delay regardless of CPU model.
    642       1.1  fredette 	 */
    643       1.1  fredette 	zc->zc_data = c;
    644       1.1  fredette 	delay(2);
    645       1.1  fredette 
    646       1.1  fredette 	splx(s);
    647       1.1  fredette }
    648       1.1  fredette 
    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  * Polled console input putchar.
    656       1.1  fredette  */
    657      1.10       chs static int
    658      1.10       chs zscngetc(dev_t dev)
    659       1.1  fredette {
    660       1.1  fredette 	return (zs_getc(zs_conschan_get));
    661       1.1  fredette }
    662       1.1  fredette 
    663       1.1  fredette /*
    664       1.1  fredette  * Polled console output putchar.
    665       1.1  fredette  */
    666      1.10       chs static void
    667      1.10       chs zscnputc(dev_t dev, int c)
    668       1.1  fredette {
    669       1.1  fredette 	zs_putc(zs_conschan_put, c);
    670       1.1  fredette }
    671       1.1  fredette 
    672       1.1  fredette int swallow_zsintrs;
    673       1.1  fredette 
    674      1.10       chs static void
    675      1.10       chs zscnpollc(dev_t dev, int on)
    676       1.1  fredette {
    677       1.1  fredette 	/*
    678       1.1  fredette 	 * Need to tell zs driver to acknowledge all interrupts or we get
    679       1.1  fredette 	 * annoying spurious interrupt messages.  This is because mucking
    680       1.1  fredette 	 * with spl() levels during polling does not prevent interrupts from
    681       1.1  fredette 	 * being generated.
    682       1.1  fredette 	 */
    683       1.1  fredette 
    684       1.1  fredette 	if (on) swallow_zsintrs++;
    685       1.1  fredette 	else swallow_zsintrs--;
    686       1.1  fredette }
    687       1.1  fredette 
    688