1 /* $NetBSD: memc_68k.c,v 1.9 2023/12/20 00:40:44 thorpej Exp $ */
2
3 /*-
4 * Copyright (c) 2000, 2002 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Steve C. Woodford.
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 * Support for the MEMECC and MEMC40 memory controllers on MVME68K
34 */
35
36 #include <sys/cdefs.h>
37 __KERNEL_RCSID(0, "$NetBSD: memc_68k.c,v 1.9 2023/12/20 00:40:44 thorpej Exp $");
38
39 #include <sys/param.h>
40 #include <sys/kernel.h>
41 #include <sys/systm.h>
42 #include <sys/device.h>
43
44 #include <machine/cpu.h>
45 #include <machine/bus.h>
46
47 #include <mvme68k/dev/mainbus.h>
48
49 #include <dev/mvme/memcvar.h>
50 #include <dev/mvme/memcreg.h>
51 #include <dev/mvme/pcctwovar.h>
52 #include <dev/mvme/pcctworeg.h>
53
54 #include "ioconf.h"
55
56 int memc_match(device_t, cfdata_t, void *);
57 void memc_attach(device_t, device_t, void *);
58
59 CFATTACH_DECL_NEW(memc, sizeof(struct memc_softc),
60 memc_match, memc_attach, NULL, NULL);
61
62
63 /* ARGSUSED */
64 int
memc_match(device_t parent,cfdata_t cf,void * aux)65 memc_match(device_t parent, cfdata_t cf, void *aux)
66 {
67 struct mainbus_attach_args *ma = aux;
68 bus_space_handle_t bh;
69 uint8_t chipid;
70 int rv;
71
72 #ifdef MVME68K
73 if (machineid != MVME_167 && machineid != MVME_177 &&
74 machineid != MVME_162 && machineid != MVME_172)
75 return 0;
76 #endif
77
78 if (strcmp(ma->ma_name, memc_cd.cd_name))
79 return 0;
80
81 if (bus_space_map(ma->ma_bust, ma->ma_offset, MEMC_REGSIZE, 0, &bh))
82 return 0;
83
84 rv = bus_space_peek_1(ma->ma_bust, bh, MEMC_REG_CHIP_ID, &chipid);
85 bus_space_unmap(ma->ma_bust, bh, MEMC_REGSIZE);
86
87 if (rv)
88 return 0;
89
90 /* Verify the Chip Id register is sane */
91 if (chipid != MEMC_CHIP_ID_MEMC040 && chipid != MEMC_CHIP_ID_MEMECC)
92 return 0;
93
94 return 1;
95 }
96
97 /* ARGSUSED */
98 void
memc_attach(device_t parent,device_t self,void * aux)99 memc_attach(device_t parent, device_t self, void *aux)
100 {
101 struct mainbus_attach_args *ma = aux;
102 struct memc_softc *sc = device_private(self);
103
104 sc->sc_dev = self;
105 sc->sc_bust = ma->ma_bust;
106
107 /* Map the memory controller's registers */
108 bus_space_map(sc->sc_bust, ma->ma_offset, MEMC_REGSIZE, 0,
109 &sc->sc_bush);
110
111 /* Finish initialisation in common code */
112 memc_init(sc);
113 }
114