1 /* $NetBSD: eeprom.c,v 1.7 2008/04/28 20:23:36 martin Exp $ */ 2 3 /*- 4 * Copyright (c) 2002 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Paul Kranenburg. 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 * eeprom driver. Sun 4 machines use the old-style (a'la Sun 3) EEPROM. 34 * On the 4/100's and 4/200's, this is at a separate obio space. 35 * On the 4/300's and 4/400's, however, it is the cl_nvram[] chunk of 36 * the Mostek chip. Therefore, eeprom_match will only return true on 37 * the 100/200 models, and the eeprom will be attached separately. 38 * On the 300/400 models, the eeprom will be dealt with when the clock 39 * is attached. 40 */ 41 42 #include <sys/cdefs.h> 43 __KERNEL_RCSID(0, "$NetBSD: eeprom.c,v 1.7 2008/04/28 20:23:36 martin Exp $"); 44 45 #include "opt_sparc_arch.h" 46 47 #include <sys/param.h> 48 #include <sys/kernel.h> 49 #include <sys/device.h> 50 #include <sys/systm.h> 51 52 #include <machine/bus.h> 53 #include <machine/autoconf.h> 54 #include <machine/eeprom.h> 55 56 #include <dev/clock_subr.h> 57 58 /* Imported from clock.c: */ 59 extern char *eeprom_va; 60 61 static int eeprom_match(struct device *, struct cfdata *, void *); 62 static void eeprom_attach(struct device *, struct device *, void *); 63 64 CFATTACH_DECL(eeprom, sizeof(struct device), 65 eeprom_match, eeprom_attach, NULL, NULL); 66 67 /* We support only one eeprom device */ 68 static int eeprom_attached; 69 70 /* 71 * Sun 4/100, 4/200 EEPROM match routine. 72 */ 73 static int 74 eeprom_match(struct device *parent, struct cfdata *cf, void *aux) 75 { 76 union obio_attach_args *uoba = aux; 77 struct obio4_attach_args *oba; 78 79 if (uoba->uoba_isobio4 == 0) 80 return (0); 81 82 if (eeprom_attached) 83 /* We support only one eeprom device */ 84 return (0); 85 86 /* Only these sun4s have oclock */ 87 if (!CPU_ISSUN4 || 88 (cpuinfo.cpu_type != CPUTYP_4_100 && 89 cpuinfo.cpu_type != CPUTYP_4_200)) 90 return (0); 91 92 /* Make sure there is something there */ 93 oba = &uoba->uoba_oba4; 94 return (bus_space_probe(oba->oba_bustag, oba->oba_paddr, 95 1, /* probe size */ 96 0, /* offset */ 97 0, /* flags */ 98 NULL, NULL)); 99 } 100 101 static void 102 eeprom_attach(struct device *parent, struct device *self, void *aux) 103 { 104 #if defined(SUN4) 105 union obio_attach_args *uoba = aux; 106 struct obio4_attach_args *oba = &uoba->uoba_oba4; 107 bus_space_handle_t bh; 108 109 eeprom_attached = 1; 110 printf("\n"); 111 112 if (bus_space_map(oba->oba_bustag, 113 oba->oba_paddr, 114 EEPROM_SIZE, 115 BUS_SPACE_MAP_LINEAR, /* flags */ 116 &bh) != 0) { 117 printf("%s: can't map register\n", self->dv_xname); 118 return; 119 } 120 eeprom_va = (char *)bh; 121 #endif /* SUN4 */ 122 } 123