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scsirom.c revision 1.16.42.2 
      1 /*	$NetBSD: scsirom.c,v 1.16.42.2 2009/05/04 08:12:06 yamt Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 1999 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Minoura Makoto.
      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 /*
     33  * SCSI BIOS ROM.
     34  * Used to probe the board.
     35  */
     36 
     37 #include <sys/cdefs.h>
     38 __KERNEL_RCSID(0, "$NetBSD: scsirom.c,v 1.16.42.2 2009/05/04 08:12:06 yamt Exp $");
     39 
     40 #include <sys/param.h>
     41 #include <sys/systm.h>
     42 #include <sys/device.h>
     43 
     44 #include <machine/bus.h>
     45 #include <machine/cpu.h>
     46 
     47 #include <arch/x68k/dev/intiovar.h>
     48 #include <arch/x68k/dev/scsiromvar.h>
     49 
     50 struct {
     51 	paddr_t addr, devaddr;
     52 	int intr;
     53 	const char id[7];
     54 } scsirom_descr[] = {{
     55 	0x00fc0000, 0x00e96020, 108, "SCSIIN"
     56 }, {
     57 	0x00ea0020, 0x00ea0000, 246, "SCSIEX"
     58 }};
     59 
     60 #define SCSIROM_ID	0x24
     61 
     62 /*
     63  * autoconf stuff
     64  */
     65 static int scsirom_find(device_t, struct intio_attach_args *);
     66 static int scsirom_match(device_t, cfdata_t, void *);
     67 static void scsirom_attach(device_t, device_t, void *);
     68 
     69 CFATTACH_DECL_NEW(scsirom, sizeof(struct scsirom_softc),
     70     scsirom_match, scsirom_attach, NULL, NULL);
     71 
     72 static int
     73 scsirom_find(device_t parent, struct intio_attach_args *ia)
     74 {
     75 	bus_space_handle_t ioh;
     76 	char buf[10];
     77 	int which;
     78 	int r = -1;
     79 
     80 	if (ia->ia_addr == scsirom_descr[INTERNAL].addr)
     81 		which = INTERNAL;
     82 	else if (ia->ia_addr == scsirom_descr[EXTERNAL].addr)
     83 		which = EXTERNAL;
     84 	else
     85 		return -1;
     86 
     87 	ia->ia_size = 0x1fe0;
     88 	if (intio_map_allocate_region(parent, ia, INTIO_MAP_TESTONLY))
     89 		return -1;
     90 
     91 	if (bus_space_map(ia->ia_bst, ia->ia_addr, ia->ia_size, 0, &ioh) < 0)
     92 		return -1;
     93 	if (badaddr((void *)IIOV(ia->ia_addr+SCSIROM_ID))) {
     94 		bus_space_unmap(ia->ia_bst, ioh, ia->ia_size);
     95 		return -1;
     96 	}
     97 	bus_space_read_region_1(ia->ia_bst, ioh, SCSIROM_ID, buf, 6);
     98 	if (memcmp(buf, scsirom_descr[which].id, 6) == 0)
     99 		r = which;
    100 	bus_space_unmap(ia->ia_bst, ioh, ia->ia_size);
    101 
    102 	return r;
    103 }
    104 
    105 static int
    106 scsirom_match(device_t parent, cfdata_t cf, void *aux)
    107 {
    108 	struct intio_attach_args *ia = aux;
    109 	int r;
    110 
    111 	if (strcmp(ia->ia_name, "scsirom") != 0)
    112 		return 0;
    113 
    114 	if (ia->ia_addr == INTIOCF_ADDR_DEFAULT) {
    115 		ia->ia_addr = scsirom_descr[0].addr;
    116 		r = scsirom_find(parent, ia);
    117 		if (r == INTERNAL)
    118 			return 1;
    119 		ia->ia_addr = scsirom_descr[1].addr;
    120 		r = scsirom_find(parent, ia);
    121 		if (r == EXTERNAL)
    122 			return 1;
    123 		return 0;
    124 	} else if (scsirom_find(parent, ia) >= 0)
    125 		return 1;
    126 	else
    127 		return 0;
    128 }
    129 
    130 static void
    131 scsirom_attach(device_t parent, device_t self, void *aux)
    132 {
    133 	struct scsirom_softc *sc = device_private(self);
    134 	struct intio_attach_args *ia = aux;
    135 	int r;
    136 	cfdata_t cf;
    137 
    138 	sc->sc_addr = ia->ia_addr;
    139 	sc->sc_which = scsirom_find(parent, ia);
    140 #ifdef DIAGNOSTIC
    141 	if (sc->sc_which < 0)
    142 		panic("SCSIROM curruption??");
    143 #endif
    144 	r = intio_map_allocate_region(parent, ia, INTIO_MAP_ALLOCATE);
    145 #ifdef DIAGNOSTIC
    146 	if (r)
    147 		panic("IO map for SCSIROM corruption??");
    148 #endif
    149 
    150 	ia->ia_addr = scsirom_descr[sc->sc_which].devaddr;
    151 	if (ia->ia_intr == INTIOCF_INTR_DEFAULT)
    152 		ia->ia_intr = scsirom_descr[sc->sc_which].intr;
    153 
    154 	if (sc->sc_which == INTERNAL)
    155 		aprint_normal(": On-board at %p\n", (void *)ia->ia_addr);
    156 	else
    157 		aprint_normal(": External at %p\n", (void *)ia->ia_addr);
    158 
    159 	cf = config_search_ia(NULL, self, "scsirom", ia);
    160 	if (cf) {
    161 		config_attach(self, cf, ia, NULL);
    162 	} else {
    163 		aprint_normal_dev(self, "no matching device; ignored.\n");
    164 	}
    165 
    166 	return;
    167 }
    168