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ast.c revision 1.17
      1  1.17      cgd /*	$NetBSD: ast.c,v 1.17 1995/04/17 12:08:36 cgd Exp $	*/
      2   1.9      cgd 
      3   1.1      cgd /*
      4  1.15  mycroft  * Copyright (c) 1995 Charles Hannum.  All rights reserved.
      5   1.1      cgd  *
      6  1.15  mycroft  * This code is derived from public-domain software written by
      7  1.15  mycroft  * Roland McGrath.
      8  1.15  mycroft  *
      9  1.15  mycroft  * Redistribution and use in source and binary forms, with or without
     10  1.15  mycroft  * modification, are permitted provided that the following conditions
     11  1.15  mycroft  * are met:
     12  1.15  mycroft  * 1. Redistributions of source code must retain the above copyright
     13  1.15  mycroft  *    notice, this list of conditions and the following disclaimer.
     14  1.15  mycroft  * 2. Redistributions in binary form must reproduce the above copyright
     15  1.15  mycroft  *    notice, this list of conditions and the following disclaimer in the
     16  1.15  mycroft  *    documentation and/or other materials provided with the distribution.
     17  1.15  mycroft  * 3. All advertising materials mentioning features or use of this software
     18  1.15  mycroft  *    must display the following acknowledgement:
     19  1.15  mycroft  *	This product includes software developed by Charles Hannum.
     20  1.15  mycroft  * 4. The name of the author may not be used to endorse or promote products
     21  1.15  mycroft  *    derived from this software without specific prior written permission.
     22  1.15  mycroft  *
     23  1.15  mycroft  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     24  1.15  mycroft  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     25  1.15  mycroft  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     26  1.15  mycroft  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     27  1.15  mycroft  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     28  1.15  mycroft  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     29  1.15  mycroft  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     30  1.15  mycroft  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     31  1.15  mycroft  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     32  1.15  mycroft  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     33   1.1      cgd  */
     34   1.1      cgd 
     35   1.5  mycroft #include <sys/param.h>
     36   1.2  mycroft #include <sys/device.h>
     37   1.1      cgd 
     38   1.1      cgd #include <machine/pio.h>
     39   1.5  mycroft 
     40  1.17      cgd #include <dev/isa/isavar.h>
     41   1.1      cgd 
     42   1.2  mycroft struct ast_softc {
     43   1.2  mycroft 	struct device sc_dev;
     44  1.17      cgd 	void *sc_ih;
     45   1.7  mycroft 
     46  1.11  mycroft 	int sc_iobase;
     47   1.5  mycroft 	int sc_alive;		/* mask of slave units attached */
     48   1.7  mycroft 	void *sc_slaves[4];	/* com device unit numbers */
     49   1.5  mycroft };
     50   1.5  mycroft 
     51   1.5  mycroft int astprobe();
     52   1.5  mycroft void astattach();
     53  1.17      cgd int astintr __P((void *));
     54   1.5  mycroft 
     55   1.5  mycroft struct cfdriver astcd = {
     56  1.13  mycroft 	NULL, "ast", astprobe, astattach, DV_TTY, sizeof(struct ast_softc)
     57   1.5  mycroft };
     58   1.1      cgd 
     59   1.1      cgd int
     60   1.5  mycroft astprobe(parent, self, aux)
     61   1.5  mycroft 	struct device *parent, *self;
     62   1.5  mycroft 	void *aux;
     63   1.1      cgd {
     64   1.5  mycroft 	struct isa_attach_args *ia = aux;
     65   1.2  mycroft 
     66   1.1      cgd 	/*
     67   1.1      cgd 	 * Do the normal com probe for the first UART and assume
     68   1.1      cgd 	 * its presence means there is a multiport board there.
     69   1.5  mycroft 	 * XXX Needs more robustness.
     70   1.1      cgd 	 */
     71   1.6  mycroft 	ia->ia_iosize = 4 * 8;
     72  1.10  mycroft 	return (comprobe1(ia->ia_iobase));
     73   1.1      cgd }
     74   1.1      cgd 
     75   1.5  mycroft struct ast_attach_args {
     76   1.5  mycroft 	int aa_slave;
     77   1.5  mycroft };
     78   1.5  mycroft 
     79   1.1      cgd int
     80  1.10  mycroft astsubmatch(parent, match, aux)
     81  1.10  mycroft 	struct device *parent;
     82  1.10  mycroft 	void *match, *aux;
     83   1.1      cgd {
     84   1.5  mycroft 	struct ast_softc *sc = (void *)parent;
     85  1.16  mycroft 	struct cfdata *cf = match;
     86  1.10  mycroft 	struct isa_attach_args *ia = aux;
     87  1.10  mycroft 	struct ast_attach_args *aa = ia->ia_aux;
     88   1.2  mycroft 
     89  1.10  mycroft 	if (cf->cf_loc[0] != -1 && cf->cf_loc[0] != aa->aa_slave)
     90  1.10  mycroft 		return (0);
     91  1.10  mycroft 	return ((*cf->cf_driver->cd_match)(parent, match, ia));
     92  1.10  mycroft }
     93  1.10  mycroft 
     94  1.10  mycroft int
     95  1.10  mycroft astprint(aux, ast)
     96  1.10  mycroft 	void *aux;
     97  1.10  mycroft 	char *ast;
     98  1.10  mycroft {
     99  1.10  mycroft 	struct isa_attach_args *ia = aux;
    100  1.10  mycroft 	struct ast_attach_args *aa = ia->ia_aux;
    101  1.10  mycroft 
    102  1.10  mycroft 	printf(" slave %d", aa->aa_slave);
    103   1.1      cgd }
    104   1.1      cgd 
    105   1.1      cgd void
    106   1.5  mycroft astattach(parent, self, aux)
    107   1.5  mycroft 	struct device *parent, *self;
    108   1.5  mycroft 	void *aux;
    109   1.1      cgd {
    110   1.5  mycroft 	struct ast_softc *sc = (void *)self;
    111   1.5  mycroft 	struct isa_attach_args *ia = aux;
    112   1.5  mycroft 	struct ast_attach_args aa;
    113  1.10  mycroft 	struct isa_attach_args isa;
    114  1.10  mycroft 
    115  1.10  mycroft 	sc->sc_iobase = ia->ia_iobase;
    116   1.1      cgd 
    117   1.5  mycroft 	/*
    118   1.5  mycroft 	 * Enable the master interrupt.
    119   1.5  mycroft 	 */
    120   1.5  mycroft 	outb(sc->sc_iobase | 0x1f, 0x80);
    121  1.10  mycroft 
    122   1.5  mycroft 	printf("\n");
    123   1.5  mycroft 
    124  1.10  mycroft 	isa.ia_aux = &aa;
    125  1.10  mycroft 	for (aa.aa_slave = 0; aa.aa_slave < 4; aa.aa_slave++) {
    126  1.13  mycroft 		struct cfdata *cf;
    127  1.10  mycroft 		isa.ia_iobase = sc->sc_iobase + 8 * aa.aa_slave;
    128  1.10  mycroft 		isa.ia_iosize = 0x666;
    129  1.10  mycroft 		isa.ia_irq = IRQUNK;
    130  1.10  mycroft 		isa.ia_drq = DRQUNK;
    131  1.10  mycroft 		isa.ia_msize = 0;
    132  1.13  mycroft 		if ((cf = config_search(astsubmatch, self, &isa)) != 0) {
    133  1.13  mycroft 			config_attach(self, cf, &isa, astprint);
    134  1.13  mycroft 			sc->sc_slaves[aa.aa_slave] =
    135  1.13  mycroft 			    cf->cf_driver->cd_devs[cf->cf_unit];
    136  1.10  mycroft 			sc->sc_alive |= 1 << aa.aa_slave;
    137  1.10  mycroft 		}
    138  1.10  mycroft 	}
    139   1.7  mycroft 
    140  1.17      cgd 	sc->sc_ih = isa_intr_establish(ia->ia_irq, ISA_IST_EDGE, ISA_IPL_TTY,
    141  1.17      cgd 	    astintr, sc);
    142   1.1      cgd }
    143   1.1      cgd 
    144   1.1      cgd int
    145  1.17      cgd astintr(arg)
    146  1.17      cgd 	void *arg;
    147   1.1      cgd {
    148  1.17      cgd 	struct ast_softc *sc = arg;
    149  1.12  mycroft 	int iobase = sc->sc_iobase;
    150   1.2  mycroft 	int alive = sc->sc_alive;
    151   1.1      cgd 	int bits;
    152   1.1      cgd 
    153  1.10  mycroft 	bits = ~inb(iobase | 0x1f) & alive;
    154   1.8  mycroft 	if (bits == 0)
    155  1.10  mycroft 		return (0);
    156   1.2  mycroft 
    157   1.8  mycroft 	for (;;) {
    158   1.2  mycroft #define	TRY(n) \
    159   1.8  mycroft 		if (bits & (1 << (n))) \
    160   1.5  mycroft 			comintr(sc->sc_slaves[n]);
    161   1.2  mycroft 		TRY(0);
    162   1.2  mycroft 		TRY(1);
    163   1.2  mycroft 		TRY(2);
    164   1.2  mycroft 		TRY(3);
    165   1.5  mycroft #undef TRY
    166  1.10  mycroft 		bits = ~inb(iobase | 0x1f) & alive;
    167   1.8  mycroft 		if (bits == 0)
    168  1.10  mycroft 			return (1);
    169   1.8  mycroft  	}
    170   1.1      cgd }
    171