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      1 /*	$NetBSD: lm_pnpbios.c,v 1.15 2011/07/01 18:14:15 dyoung 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  *
     19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  * POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 #include <sys/cdefs.h>
     33 __KERNEL_RCSID(0, "$NetBSD: lm_pnpbios.c,v 1.15 2011/07/01 18:14:15 dyoung Exp $");
     34 
     35 #include <sys/param.h>
     36 #include <sys/systm.h>
     37 #include <sys/errno.h>
     38 #include <sys/ioctl.h>
     39 #include <sys/syslog.h>
     40 #include <sys/device.h>
     41 #include <sys/proc.h>
     42 
     43 #include <sys/bus.h>
     44 
     45 #include <dev/isa/isavar.h>
     46 #include <dev/isa/isadmavar.h>
     47 
     48 #include <i386/pnpbios/pnpbiosvar.h>
     49 
     50 #include <dev/sysmon/sysmonvar.h>
     51 
     52 #include <dev/ic/nslm7xvar.h>
     53 
     54 
     55 int 	lm_pnpbios_match(device_t, cfdata_t, void *);
     56 void 	lm_pnpbios_attach(device_t, device_t, void *);
     57 
     58 int 	lm_pnpbios_hints_index(const char *);
     59 uint8_t lm_pnpbios_readreg(struct lm_softc *, int);
     60 void 	lm_pnpbios_writereg(struct lm_softc *, int, int);
     61 
     62 
     63 CFATTACH_DECL_NEW(lm_pnpbios, sizeof(struct lm_softc),
     64     lm_pnpbios_match, lm_pnpbios_attach, NULL, NULL);
     65 
     66 /*
     67  * XXX - no known pnpbios ids for lm series chips.
     68  */
     69 struct lm_pnpbios_hint {
     70 	char idstr[8];
     71 	int io_region_idx_lm7x;
     72 };
     73 
     74 /*
     75  * Currently no known valid pnpbios id's - PNP0C02 is
     76  * for reserved motherboard resources, probing it is bad.
     77  */
     78 struct lm_pnpbios_hint lm_pnpbios_hints[] = {
     79 	{ { 0 }, 0 }
     80 };
     81 
     82 
     83 int
     84 lm_pnpbios_hints_index(const char *idstr)
     85 {
     86 	int idx = 0;
     87 
     88 	while (lm_pnpbios_hints[idx].idstr[0] != 0) {
     89 		if (!strcmp(lm_pnpbios_hints[idx].idstr, idstr))
     90 			return idx;
     91 		++idx;
     92 	}
     93 
     94 	return -1;
     95 }
     96 
     97 int
     98 lm_pnpbios_match(device_t parent, cfdata_t match, void *aux)
     99 {
    100 	struct pnpbiosdev_attach_args *aa = aux;
    101 	struct lm_pnpbios_hint *wph;
    102 	bus_space_tag_t iot;
    103 	bus_space_handle_t ioh;
    104 	int rv;
    105 
    106 	int wphi;
    107 
    108 	if ((wphi = lm_pnpbios_hints_index(aa->idstr)) == -1)
    109 		return 0;
    110 
    111 	wph = &lm_pnpbios_hints[wphi];
    112 
    113 	if (pnpbios_io_map(aa->pbt, aa->resc, wph->io_region_idx_lm7x,
    114 			   &iot, &ioh)) {
    115 		return 0;
    116 	}
    117 
    118 	rv = lm_probe(iot, ioh);
    119 
    120 	pnpbios_io_unmap(aa->pbt, aa->resc, wph->io_region_idx_lm7x,
    121 			 iot, ioh);
    122 
    123 	return rv;
    124 }
    125 
    126 void
    127 lm_pnpbios_attach(device_t parent, device_t self, void *aux)
    128 {
    129 	struct lm_softc *sc = device_private(self);
    130 	struct pnpbiosdev_attach_args *aa = aux;
    131 	struct lm_pnpbios_hint *wph;
    132 
    133 	wph = &lm_pnpbios_hints[lm_pnpbios_hints_index(aa->idstr)];
    134 
    135 	if (pnpbios_io_map(aa->pbt, aa->resc, wph->io_region_idx_lm7x,
    136 			   &sc->lm_iot, &sc->lm_ioh)) {
    137 		aprint_error(": can't map i/o space\n");
    138 		return;
    139 	}
    140 
    141 	aprint_naive("\n");
    142 	aprint_normal("\n");
    143 	pnpbios_print_devres(self, aa);
    144 
    145 	/* Bus-independent attach */
    146 	sc->lm_writereg = lm_pnpbios_writereg;
    147 	sc->lm_readreg = lm_pnpbios_readreg;
    148 
    149 	lm_attach(sc);
    150 }
    151 
    152 uint8_t
    153 lm_pnpbios_readreg(struct lm_softc *sc, int reg)
    154 {
    155 	bus_space_write_1(sc->lm_iot, sc->lm_ioh, LMC_ADDR, reg);
    156 	return (bus_space_read_1(sc->lm_iot, sc->lm_ioh, LMC_DATA));
    157 }
    158 
    159 
    160 void
    161 lm_pnpbios_writereg(struct lm_softc *sc, int reg, int val)
    162 {
    163 	bus_space_write_1(sc->lm_iot, sc->lm_ioh, LMC_ADDR, reg);
    164 	bus_space_write_1(sc->lm_iot, sc->lm_ioh, LMC_DATA, val);
    165 }
    166