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/param.h> 30 #include <sys/systm.h> 31 #include <sys/kernel.h> 32 #include <sys/bus.h> 33 #include <sys/module.h> 34 #include <isa/isavar.h> 35 #include <isa/isa_common.h> 36 #include <machine/resource.h> 37 38 void 39 isa_hinted_child(device_t parent, const char *name, int unit) 40 { 41 device_t child; 42 int sensitive, start, count; 43 int order; 44 45 /* device-specific flag overrides any wildcard */ 46 sensitive = 0; 47 if (resource_int_value(name, unit, "sensitive", &sensitive) != 0) 48 resource_int_value(name, -1, "sensitive", &sensitive); 49 50 if (sensitive) 51 order = ISA_ORDER_SENSITIVE; 52 else 53 order = ISA_ORDER_SPECULATIVE; 54 55 child = BUS_ADD_CHILD(parent, order, name, unit); 56 if (child == 0) 57 return; 58 59 start = 0; 60 count = 0; 61 resource_int_value(name, unit, "port", &start); 62 resource_int_value(name, unit, "portsize", &count); 63 if (start > 0 || count > 0) 64 bus_set_resource(child, SYS_RES_IOPORT, 0, start, count); 65 66 start = 0; 67 count = 0; 68 resource_int_value(name, unit, "maddr", &start); 69 resource_int_value(name, unit, "msize", &count); 70 if (start > 0 || count > 0) 71 bus_set_resource(child, SYS_RES_MEMORY, 0, start, count); 72 73 if (resource_int_value(name, unit, "irq", &start) == 0 && start > 0) 74 bus_set_resource(child, SYS_RES_IRQ, 0, start, 1); 75 76 if (resource_int_value(name, unit, "drq", &start) == 0 && start >= 0) 77 bus_set_resource(child, SYS_RES_DRQ, 0, start, 1); 78 79 if (resource_disabled(name, unit)) 80 device_disable(child); 81 82 isa_set_configattr(child, (isa_get_configattr(child)|ISACFGATTR_HINTS)); 83 } 84 85 static int 86 isa_match_resource_hint(device_t dev, int type, long value) 87 { 88 struct isa_device* idev = DEVTOISA(dev); 89 struct resource_list *rl = &idev->id_resources; 90 struct resource_list_entry *rle; 91 92 STAILQ_FOREACH(rle, rl, link) { 93 if (rle->type != type) 94 continue; 95 if (rle->start <= value && rle->end >= value) 96 return (1); 97 } 98 return (0); 99 } 100 101 void 102 isa_hint_device_unit(device_t bus, device_t child, const char *name, int *unitp) 103 { 104 const char *s; 105 long value; 106 int line, matches, unit; 107 108 line = 0; 109 for (;;) { 110 if (resource_find_dev(&line, name, &unit, "at", NULL) != 0) 111 break; 112 113 /* Must have an "at" for isa. */ 114 resource_string_value(name, unit, "at", &s); 115 if (!(strcmp(s, device_get_nameunit(bus)) == 0 || 116 strcmp(s, device_get_name(bus)) == 0)) 117 continue; 118 119 /* 120 * Check for matching resources. We must have at 121 * least one match. Since I/O and memory resources 122 * cannot be shared, if we get a match on either of 123 * those, ignore any mismatches in IRQs or DRQs. 124 * 125 * XXX: We may want to revisit this to be more lenient 126 * and wire as long as it gets one match. 127 */ 128 matches = 0; 129 if (resource_long_value(name, unit, "port", &value) == 0) { 130 /* 131 * Floppy drive controllers are notorious for 132 * having a wide variety of resources not all 133 * of which include the first port that is 134 * specified by the hint (typically 0x3f0) 135 * (see the comment above 136 * fdc_isa_alloc_resources() in fdc_isa.c). 137 * However, they do all seem to include port + 138 * 2 (e.g. 0x3f2) so for a floppy device, look 139 * for 'value + 2' in the port resources 140 * instead of the hint value. 141 */ 142 if (strcmp(name, "fdc") == 0) 143 value += 2; 144 if (isa_match_resource_hint(child, SYS_RES_IOPORT, 145 value)) 146 matches++; 147 else 148 continue; 149 } 150 if (resource_long_value(name, unit, "maddr", &value) == 0) { 151 if (isa_match_resource_hint(child, SYS_RES_MEMORY, 152 value)) 153 matches++; 154 else 155 continue; 156 } 157 if (matches > 0) 158 goto matched; 159 if (resource_long_value(name, unit, "irq", &value) == 0) { 160 if (isa_match_resource_hint(child, SYS_RES_IRQ, value)) 161 matches++; 162 else 163 continue; 164 } 165 if (resource_long_value(name, unit, "drq", &value) == 0) { 166 if (isa_match_resource_hint(child, SYS_RES_DRQ, value)) 167 matches++; 168 else 169 continue; 170 } 171 172 matched: 173 if (matches > 0) { 174 /* We have a winner! */ 175 *unitp = unit; 176 break; 177 } 178 } 179 } 180