1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (c) 1999 Doug Rabson 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 #include <sys/cdefs.h> 30 #include <sys/param.h> 31 #include <sys/systm.h> 32 #include <sys/kernel.h> 33 #include <sys/bus.h> 34 #include <sys/module.h> 35 #include <isa/isavar.h> 36 #include <isa/isa_common.h> 37 #include <machine/resource.h> 38 39 void 40 isa_hinted_child(device_t parent, const char *name, int unit) 41 { 42 device_t child; 43 int sensitive, start, count; 44 int order; 45 46 /* device-specific flag overrides any wildcard */ 47 sensitive = 0; 48 if (resource_int_value(name, unit, "sensitive", &sensitive) != 0) 49 resource_int_value(name, -1, "sensitive", &sensitive); 50 51 if (sensitive) 52 order = ISA_ORDER_SENSITIVE; 53 else 54 order = ISA_ORDER_SPECULATIVE; 55 56 child = BUS_ADD_CHILD(parent, order, name, unit); 57 if (child == 0) 58 return; 59 60 start = 0; 61 count = 0; 62 resource_int_value(name, unit, "port", &start); 63 resource_int_value(name, unit, "portsize", &count); 64 if (start > 0 || count > 0) 65 bus_set_resource(child, SYS_RES_IOPORT, 0, start, count); 66 67 start = 0; 68 count = 0; 69 resource_int_value(name, unit, "maddr", &start); 70 resource_int_value(name, unit, "msize", &count); 71 if (start > 0 || count > 0) 72 bus_set_resource(child, SYS_RES_MEMORY, 0, start, count); 73 74 if (resource_int_value(name, unit, "irq", &start) == 0 && start > 0) 75 bus_set_resource(child, SYS_RES_IRQ, 0, start, 1); 76 77 if (resource_int_value(name, unit, "drq", &start) == 0 && start >= 0) 78 bus_set_resource(child, SYS_RES_DRQ, 0, start, 1); 79 80 if (resource_disabled(name, unit)) 81 device_disable(child); 82 83 isa_set_configattr(child, (isa_get_configattr(child)|ISACFGATTR_HINTS)); 84 } 85 86 static int 87 isa_match_resource_hint(device_t dev, int type, long value) 88 { 89 struct isa_device* idev = DEVTOISA(dev); 90 struct resource_list *rl = &idev->id_resources; 91 struct resource_list_entry *rle; 92 93 STAILQ_FOREACH(rle, rl, link) { 94 if (rle->type != type) 95 continue; 96 if (rle->start <= value && rle->end >= value) 97 return (1); 98 } 99 return (0); 100 } 101 102 void 103 isa_hint_device_unit(device_t bus, device_t child, const char *name, int *unitp) 104 { 105 const char *s; 106 long value; 107 int line, matches, unit; 108 109 line = 0; 110 for (;;) { 111 if (resource_find_dev(&line, name, &unit, "at", NULL) != 0) 112 break; 113 114 /* Must have an "at" for isa. */ 115 resource_string_value(name, unit, "at", &s); 116 if (!(strcmp(s, device_get_nameunit(bus)) == 0 || 117 strcmp(s, device_get_name(bus)) == 0)) 118 continue; 119 120 /* 121 * Check for matching resources. We must have at 122 * least one match. Since I/O and memory resources 123 * cannot be shared, if we get a match on either of 124 * those, ignore any mismatches in IRQs or DRQs. 125 * 126 * XXX: We may want to revisit this to be more lenient 127 * and wire as long as it gets one match. 128 */ 129 matches = 0; 130 if (resource_long_value(name, unit, "port", &value) == 0) { 131 /* 132 * Floppy drive controllers are notorious for 133 * having a wide variety of resources not all 134 * of which include the first port that is 135 * specified by the hint (typically 0x3f0) 136 * (see the comment above 137 * fdc_isa_alloc_resources() in fdc_isa.c). 138 * However, they do all seem to include port + 139 * 2 (e.g. 0x3f2) so for a floppy device, look 140 * for 'value + 2' in the port resources 141 * instead of the hint value. 142 */ 143 if (strcmp(name, "fdc") == 0) 144 value += 2; 145 if (isa_match_resource_hint(child, SYS_RES_IOPORT, 146 value)) 147 matches++; 148 else 149 continue; 150 } 151 if (resource_long_value(name, unit, "maddr", &value) == 0) { 152 if (isa_match_resource_hint(child, SYS_RES_MEMORY, 153 value)) 154 matches++; 155 else 156 continue; 157 } 158 if (matches > 0) 159 goto matched; 160 if (resource_long_value(name, unit, "irq", &value) == 0) { 161 if (isa_match_resource_hint(child, SYS_RES_IRQ, value)) 162 matches++; 163 else 164 continue; 165 } 166 if (resource_long_value(name, unit, "drq", &value) == 0) { 167 if (isa_match_resource_hint(child, SYS_RES_DRQ, value)) 168 matches++; 169 else 170 continue; 171 } 172 173 matched: 174 if (matches > 0) { 175 /* We have a winner! */ 176 *unitp = unit; 177 break; 178 } 179 } 180 } 181