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isa.c revision 1.62 
      1 /*	$NetBSD: isa.c,v 1.62 1994/11/04 02:55:32 mycroft Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 1993, 1994 Charles Hannum.  All rights reserved.
      5  *
      6  * Redistribution and use in source and binary forms, with or without
      7  * modification, are permitted provided that the following conditions
      8  * are met:
      9  * 1. Redistributions of source code must retain the above copyright
     10  *    notice, this list of conditions and the following disclaimer.
     11  * 2. Redistributions in binary form must reproduce the above copyright
     12  *    notice, this list of conditions and the following disclaimer in the
     13  *    documentation and/or other materials provided with the distribution.
     14  * 3. All advertising materials mentioning features or use of this software
     15  *    must display the following acknowledgement:
     16  *	This product includes software developed by Charles Hannum.
     17  * 4. The name of the author may not be used to endorse or promote products
     18  *    derived from this software without specific prior written permission.
     19  *
     20  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     21  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     22  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     23  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     24  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     25  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     26  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     27  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     28  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     29  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 #include <sys/param.h>
     33 #include <sys/systm.h>
     34 #include <sys/kernel.h>
     35 #include <sys/conf.h>
     36 #include <sys/malloc.h>
     37 #include <sys/device.h>
     38 
     39 #include <i386/isa/isareg.h>
     40 #include <i386/isa/isavar.h>
     41 
     42 /* sorry, has to be here, no place else really suitable */
     43 #include <machine/pc/display.h>
     44 u_short *Crtat = (u_short *)MONO_BUF;
     45 
     46 int isamatch __P((struct device *, void *, void *));
     47 void isaattach __P((struct device *, struct device *, void *));
     48 
     49 struct cfdriver isacd = {
     50 	NULL, "isa", isamatch, isaattach, DV_DULL, sizeof(struct device), 1
     51 };
     52 
     53 int
     54 isamatch(parent, match, aux)
     55 	struct device *parent;
     56 	void *match, *aux;
     57 {
     58 
     59 	return (1);
     60 }
     61 
     62 int
     63 isaprint(aux, isa)
     64 	void *aux;
     65 	char *isa;
     66 {
     67 	struct isa_attach_args *ia = aux;
     68 
     69 	if (ia->ia_iosize)
     70 		printf(" port 0x%x", ia->ia_iobase);
     71 	if (ia->ia_iosize > 1)
     72 		printf("-0x%x", ia->ia_iobase + ia->ia_iosize - 1);
     73 	if (ia->ia_msize)
     74 		printf(" iomem 0x%x", ia->ia_maddr - atdevbase + 0xa0000);
     75 	if (ia->ia_msize > 1)
     76 		printf("-0x%x",
     77 		    ia->ia_maddr - atdevbase + 0xa0000 + ia->ia_msize - 1);
     78 	if (ia->ia_irq)
     79 		printf(" irq %d", ffs(ia->ia_irq) - 1);
     80 	if (ia->ia_drq != (u_short)-1)
     81 		printf(" drq %d", ia->ia_drq);
     82 	/* XXXX print flags */
     83 	return (QUIET);
     84 }
     85 
     86 int
     87 isasubmatch(parent, match, aux)
     88 	struct device *parent;
     89 	void *match, *aux;
     90 {
     91 	struct device *self = match;
     92 	struct cfdata *cf = self->dv_cfdata;
     93 	struct isa_attach_args ia;
     94 
     95 	ia.ia_iobase = cf->cf_loc[0];
     96 	ia.ia_iosize = 0x666;
     97 	ia.ia_maddr = cf->cf_loc[2] - 0xa0000 + atdevbase;
     98 	ia.ia_msize = cf->cf_loc[3];
     99 	ia.ia_irq = (cf->cf_loc[4] == -1) ? IRQUNK : (1 << cf->cf_loc[4]);
    100 	ia.ia_drq = cf->cf_loc[5];
    101 
    102 	if ((*cf->cf_driver->cd_match)(parent, match, &ia) <= 0) {
    103 		/*
    104 		 * If we don't do this, isaattach() will repeatedly try to
    105 		 * probe devices that weren't found.  But we need to be careful
    106 		 * to do it only for the ISA bus, or we would cause things like
    107 		 * `com0 at ast? slave ?' to not probe on the second ast.
    108 		 */
    109 		if (parent->dv_cfdata->cf_driver == &isacd)
    110 			cf->cf_fstate = FSTATE_FOUND;
    111 		return (0);
    112 	}
    113 
    114 	config_attach(parent, match, &ia, isaprint);
    115 	return (1);
    116 }
    117 
    118 void
    119 isaattach(parent, self, aux)
    120 	struct device *parent, *self;
    121 	void *aux;
    122 {
    123 
    124 	printf("\n");
    125 
    126 	while (config_search(isasubmatch, self, NULL) != NULL);
    127 }
    128