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 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 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