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lm_isa.c revision 1.1 
      1 /*	$NetBSD: lm_isa.c,v 1.1 2000/02/25 02:17:44 groo Exp $ */
      2 
      3 /*-
      4  * Copyright (c) 2000 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Bill Squier.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  * 3. All advertising materials mentioning features or use of this software
     19  *    must display the following acknowledgement:
     20  *        This product includes software developed by the NetBSD
     21  *        Foundation, Inc. and its contributors.
     22  * 4. Neither the name of The NetBSD Foundation nor the names of its
     23  *    contributors may be used to endorse or promote products derived
     24  *    from this software without specific prior written permission.
     25  *
     26  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     27  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     28  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     29  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     30  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     31  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     32  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     33  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     34  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     35  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     36  * POSSIBILITY OF SUCH DAMAGE.
     37  */
     38 
     39 #include <sys/param.h>
     40 #include <sys/systm.h>
     41 #include <sys/kernel.h>
     42 #include <sys/proc.h>
     43 #include <sys/device.h>
     44 #include <sys/malloc.h>
     45 #include <sys/errno.h>
     46 #include <sys/conf.h>
     47 
     48 #include <sys/envsys.h>
     49 
     50 #include <machine/bus.h>
     51 
     52 #include <dev/isa/isareg.h>
     53 #include <dev/isa/isavar.h>
     54 
     55 #include <machine/intr.h>
     56 #include <machine/bus.h>
     57 
     58 #include <dev/ic/nslm7xvar.h>
     59 
     60 #if defined(LMDEBUG)
     61 #define DPRINTF(x)		do { printf x; } while (0)
     62 #else
     63 #define DPRINTF(x)
     64 #endif
     65 
     66 
     67 int lm_isa_match __P((struct device *, struct cfdata *, void *));
     68 void lm_isa_attach __P((struct device *, struct device *, void *));
     69 
     70 struct cfattach lm_isa_ca = {
     71 	sizeof(struct lm_softc), lm_isa_match, lm_isa_attach
     72 };
     73 
     74 
     75 int
     76 lm_isa_match(parent, match, aux)
     77 	struct device *parent;
     78 	struct cfdata *match;
     79 	void *aux;
     80 {
     81 	bus_space_tag_t iot;
     82 	bus_space_handle_t ioh;
     83 	struct isa_attach_args *ia = aux;
     84 	int iobase;
     85 	int rv;
     86 	u_int8_t cr;
     87 
     88 	/* Must supply an address */
     89 	if (ia->ia_iobase == ISACF_PORT_DEFAULT)
     90 		return 0;
     91 
     92 	iot = ia->ia_iot;
     93 	iobase = ia->ia_iobase;
     94 
     95 	if (bus_space_map(iot, iobase, 8, 0, &ioh))
     96 		return (0);
     97 
     98 	/* Check for some power-on defaults */
     99 	bus_space_write_1(iot, ioh, LMC_ADDR, LMD_CONFIG);
    100 
    101 	/* Perform LM78 reset */
    102 	bus_space_write_1(iot, ioh, LMC_DATA, 0x80);
    103 
    104 	/* XXX - Why do I have to reselect the register? */
    105 	bus_space_write_1(iot, ioh, LMC_ADDR, LMD_CONFIG);
    106 	cr = bus_space_read_1(iot, ioh, LMC_DATA);
    107 
    108 	/* XXX - spec says *only* 0x08! */
    109 	if ((cr == 0x08) || (cr == 0x01))
    110 		rv = 1;
    111 	else
    112 		rv = 0;
    113 
    114 	DPRINTF(("lm: rv = %d, cr = %x\n", rv, cr));
    115 
    116 	bus_space_unmap(iot, ioh, 8);
    117 
    118 	if (rv) {
    119 		ia->ia_iosize = 8;
    120 		ia->ia_msize = 0;
    121 	}
    122 
    123 	return (rv);
    124 }
    125 
    126 
    127 void
    128 lm_isa_attach(parent, self, aux)
    129 	struct device *parent, *self;
    130 	void *aux;
    131 {
    132 	struct lm_softc *lmsc = (void *)self;
    133 	int iobase;
    134 	bus_space_tag_t iot;
    135 	struct isa_attach_args *ia = aux;
    136 
    137         iobase = ia->ia_iobase;
    138 	iot = lmsc->lm_iot = ia->ia_iot;
    139 
    140 	if (bus_space_map(iot, iobase, 8, 0, &lmsc->lm_ioh)) {
    141 		printf(": can't map i/o space\n");
    142 		return;
    143 	}
    144 
    145 	/* Bus-independant attachment */
    146 	lm_attach(lmsc);
    147 }
    148