1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 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 __FBSDID("$FreeBSD$"); 31 32 #include <sys/param.h> 33 #include <sys/systm.h> 34 #include <sys/kernel.h> 35 #include <sys/bus.h> 36 #include <sys/module.h> 37 #include <isa/isavar.h> 38 #include <isa/isa_common.h> 39 #include <machine/resource.h> 40 41 void 42 isa_hinted_child(device_t parent, const char *name, int unit) 43 { 44 device_t child; 45 int sensitive, start, count; 46 int order; 47 48 /* device-specific flag overrides any wildcard */ 49 sensitive = 0; 50 if (resource_int_value(name, unit, "sensitive", &sensitive) != 0) 51 resource_int_value(name, -1, "sensitive", &sensitive); 52 53 if (sensitive) 54 order = ISA_ORDER_SENSITIVE; 55 else 56 order = ISA_ORDER_SPECULATIVE; 57 58 child = BUS_ADD_CHILD(parent, order, name, unit); 59 if (child == 0) 60 return; 61 62 start = 0; 63 count = 0; 64 resource_int_value(name, unit, "port", &start); 65 resource_int_value(name, unit, "portsize", &count); 66 if (start > 0 || count > 0) 67 bus_set_resource(child, SYS_RES_IOPORT, 0, start, count); 68 69 start = 0; 70 count = 0; 71 resource_int_value(name, unit, "maddr", &start); 72 resource_int_value(name, unit, "msize", &count); 73 if (start > 0 || count > 0) 74 bus_set_resource(child, SYS_RES_MEMORY, 0, start, count); 75 76 if (resource_int_value(name, unit, "irq", &start) == 0 && start > 0) 77 bus_set_resource(child, SYS_RES_IRQ, 0, start, 1); 78 79 if (resource_int_value(name, unit, "drq", &start) == 0 && start >= 0) 80 bus_set_resource(child, SYS_RES_DRQ, 0, start, 1); 81 82 if (resource_disabled(name, unit)) 83 device_disable(child); 84 85 isa_set_configattr(child, (isa_get_configattr(child)|ISACFGATTR_HINTS)); 86 } 87 88 static int 89 isa_match_resource_hint(device_t dev, int type, long value) 90 { 91 struct isa_device* idev = DEVTOISA(dev); 92 struct resource_list *rl = &idev->id_resources; 93 struct resource_list_entry *rle; 94 95 STAILQ_FOREACH(rle, rl, link) { 96 if (rle->type != type) 97 continue; 98 if (rle->start <= value && rle->end >= value) 99 return (1); 100 } 101 return (0); 102 } 103 104 void 105 isa_hint_device_unit(device_t bus, device_t child, const char *name, int *unitp) 106 { 107 const char *s; 108 long value; 109 int line, matches, unit; 110 111 line = 0; 112 for (;;) { 113 if (resource_find_dev(&line, name, &unit, "at", NULL) != 0) 114 break; 115 116 /* Must have an "at" for isa. */ 117 resource_string_value(name, unit, "at", &s); 118 if (!(strcmp(s, device_get_nameunit(bus)) == 0 || 119 strcmp(s, device_get_name(bus)) == 0)) 120 continue; 121 122 /* 123 * Check for matching resources. We must have at 124 * least one match. Since I/O and memory resources 125 * cannot be shared, if we get a match on either of 126 * those, ignore any mismatches in IRQs or DRQs. 127 * 128 * XXX: We may want to revisit this to be more lenient 129 * and wire as long as it gets one match. 130 */ 131 matches = 0; 132 if (resource_long_value(name, unit, "port", &value) == 0) { 133 /* 134 * Floppy drive controllers are notorious for 135 * having a wide variety of resources not all 136 * of which include the first port that is 137 * specified by the hint (typically 0x3f0) 138 * (see the comment above 139 * fdc_isa_alloc_resources() in fdc_isa.c). 140 * However, they do all seem to include port + 141 * 2 (e.g. 0x3f2) so for a floppy device, look 142 * for 'value + 2' in the port resources 143 * instead of the hint value. 144 */ 145 if (strcmp(name, "fdc") == 0) 146 value += 2; 147 if (isa_match_resource_hint(child, SYS_RES_IOPORT, 148 value)) 149 matches++; 150 else 151 continue; 152 } 153 if (resource_long_value(name, unit, "maddr", &value) == 0) { 154 if (isa_match_resource_hint(child, SYS_RES_MEMORY, 155 value)) 156 matches++; 157 else 158 continue; 159 } 160 if (matches > 0) 161 goto matched; 162 if (resource_long_value(name, unit, "irq", &value) == 0) { 163 if (isa_match_resource_hint(child, SYS_RES_IRQ, value)) 164 matches++; 165 else 166 continue; 167 } 168 if (resource_long_value(name, unit, "drq", &value) == 0) { 169 if (isa_match_resource_hint(child, SYS_RES_DRQ, value)) 170 matches++; 171 else 172 continue; 173 } 174 175 matched: 176 if (matches > 0) { 177 /* We have a winner! */ 178 *unitp = unit; 179 break; 180 } 181 } 182 } 183