1 /* $NetBSD: intio.c,v 1.19 2023/02/11 02:31:34 tsutsui Exp $ */ 2 3 /*- 4 * Copyright (c) 1996 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Jason R. Thorpe. 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 * Autoconfiguration support for next68k internal i/o space. 34 */ 35 36 #include <sys/cdefs.h> 37 __KERNEL_RCSID(0, "$NetBSD: intio.c,v 1.19 2023/02/11 02:31:34 tsutsui Exp $"); 38 39 #include <sys/param.h> 40 #include <sys/systm.h> 41 #include <sys/device.h> 42 #include <sys/reboot.h> 43 44 #include <machine/autoconf.h> 45 #include <machine/cpu.h> 46 47 #include <next68k/dev/intiovar.h> 48 49 int intiomatch(device_t, cfdata_t, void *); 50 void intioattach(device_t, device_t, void *); 51 int intioprint(void *, const char *); 52 int intiosearch(device_t, cfdata_t, const int *, void *); 53 54 CFATTACH_DECL_NEW(intio, 0, 55 intiomatch, intioattach, NULL, NULL); 56 57 static bool intio_attached; 58 59 int 60 intiomatch(device_t parent, cfdata_t match, void *aux) 61 { 62 /* Allow only one instance. */ 63 if (intio_attached) 64 return 0; 65 66 return 1; 67 } 68 69 void 70 intioattach(device_t parent, device_t self, void *aux) 71 { 72 73 printf("\n"); 74 75 /* Search for and attach children. */ 76 config_search(self, aux, 77 CFARGS(.search = intiosearch)); 78 79 intio_attached = true; 80 } 81 82 int 83 intioprint(void *aux, const char *pnp) 84 { 85 struct intio_attach_args *ia = aux; 86 87 if (ia->ia_addr) 88 aprint_normal(" addr %p", ia->ia_addr); 89 90 return UNCONF; 91 } 92 93 int 94 intiosearch(device_t parent, cfdata_t cf, const int *ldesc, void *aux) 95 { 96 struct mainbus_attach_args *mba = aux; 97 struct intio_attach_args ia; 98 99 do { 100 ia.ia_addr = NULL; 101 ia.ia_bst = NEXT68K_INTIO_BUS_SPACE; 102 ia.ia_dmat = mba->mba_dmat; 103 104 if (!config_probe(parent, cf, &ia)) 105 break; 106 config_attach(parent, cf, &ia, intioprint, CFARGS_NONE); 107 } while (cf->cf_fstate == FSTATE_STAR); 108 109 return 0; 110 } 111 112 int 113 bus_space_map(bus_space_tag_t bst, bus_addr_t addr, bus_size_t size, 114 int flags, bus_space_handle_t *bsh) 115 { 116 117 if (addr >= INTIOBASE && (addr + size) < INTIOTOP) { 118 *bsh = IIOV(addr); 119 return 0; 120 } 121 122 return EINVAL; 123 } 124 125 paddr_t 126 bus_space_mmap(bus_space_tag_t bst, bus_addr_t addr, off_t offset, int prot, 127 int flags) 128 { 129 130 if (addr >= INTIOBASE && (addr + offset) < INTIOTOP) 131 return m68k_btop(addr + offset); 132 133 return -1; 134 } 135