xref: /netbsd-src/sys/arch/x68k/dev/scsirom.c (revision c7fb772b85b2b5d4cfb282f868f454b4701534fd)
1 /*	$NetBSD: scsirom.c,v 1.22 2021/08/07 16:19:07 thorpej 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 1.22 2021/08/07 16:19:07 thorpej 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
scsirom_find(device_t parent,struct intio_attach_args * ia)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
scsirom_match(device_t parent,cfdata_t cf,void * aux)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
scsirom_attach(device_t parent,device_t self,void * aux)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 __diagused;
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(self, ia,
160 	    CFARGS_NONE);
161 	if (cf) {
162 		config_attach(self, cf, ia, NULL, CFARGS_NONE);
163 	} else {
164 		aprint_normal_dev(self, "no matching device; ignored.\n");
165 	}
166 
167 	return;
168 }
169