1 /*- 2 * FreeBSD, VLB/ISA product support functions 3 * 4 * SPDX-License-Identifier: BSD-3-Clause 5 * 6 * Copyright (c) 2004 Justin T. Gibbs. 7 * All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions, and the following disclaimer, 14 * without modification. 15 * 2. Redistributions in binary form must reproduce at minimum a disclaimer 16 * substantially similar to the "NO WARRANTY" disclaimer below 17 * ("Disclaimer") and any redistribution must be conditioned upon 18 * including a substantially similar Disclaimer requirement for further 19 * binary redistribution. 20 * 3. Neither the names of the above-listed copyright holders nor the names 21 * of any contributors may be used to endorse or promote products derived 22 * from this software without specific prior written permission. 23 * 24 * NO WARRANTY 25 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 26 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 27 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR 28 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 29 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 33 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 34 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 35 * POSSIBILITY OF SUCH DAMAGES. 36 * 37 * $Id$ 38 */ 39 40 #include <sys/cdefs.h> 41 #include <dev/aic7xxx/aic7xxx_osm.h> 42 43 #include <sys/limits.h> /* For CHAR_BIT*/ 44 #include <isa/isavar.h> /* For ISA attach glue */ 45 46 static struct aic7770_identity *ahc_isa_find_device(bus_space_tag_t tag, 47 bus_space_handle_t bsh); 48 static void ahc_isa_identify(driver_t *driver, 49 device_t parent); 50 static int ahc_isa_probe(device_t dev); 51 static int ahc_isa_attach(device_t dev); 52 53 /* 54 * Perform an EISA probe of the address with the addition 55 * of a "priming" step. The 284X requires priming (a write 56 * to offset 0x80, the first EISA ID register) to ensure it 57 * is not mistaken as an EISA card. Once we have the ID, 58 * lookup the controller in the aic7770 table of supported 59 * devices. 60 */ 61 static struct aic7770_identity * 62 ahc_isa_find_device(bus_space_tag_t tag, bus_space_handle_t bsh) { 63 uint32_t id; 64 u_int id_size; 65 int i; 66 67 id = 0; 68 id_size = sizeof(id); 69 for (i = 0; i < id_size; i++) { 70 bus_space_write_1(tag, bsh, 0x80, 0x80 + i); 71 id |= bus_space_read_1(tag, bsh, 0x80 + i) 72 << ((id_size - i - 1) * CHAR_BIT); 73 } 74 75 return (aic7770_find_device(id)); 76 } 77 78 static void 79 ahc_isa_identify(driver_t *driver, device_t parent) 80 { 81 int slot; 82 int max_slot; 83 84 max_slot = 14; 85 for (slot = 0; slot <= max_slot; slot++) { 86 struct aic7770_identity *entry; 87 bus_space_tag_t tag; 88 bus_space_handle_t bsh; 89 struct resource *regs; 90 uint32_t iobase; 91 int rid; 92 93 rid = 0; 94 iobase = (slot * AHC_EISA_SLOT_SIZE) + AHC_EISA_SLOT_OFFSET; 95 regs = bus_alloc_resource(parent, SYS_RES_IOPORT, &rid, 96 iobase, iobase, AHC_EISA_IOSIZE, 97 RF_ACTIVE); 98 if (regs == NULL) { 99 if (bootverbose) 100 printf("ahc_isa_identify %d: ioport 0x%x " 101 "alloc failed\n", slot, iobase); 102 continue; 103 } 104 105 tag = rman_get_bustag(regs); 106 bsh = rman_get_bushandle(regs); 107 108 entry = ahc_isa_find_device(tag, bsh); 109 if (entry != NULL) { 110 device_t child; 111 112 child = BUS_ADD_CHILD(parent, ISA_ORDER_SPECULATIVE, 113 "ahc", -1); 114 if (child != NULL) { 115 device_set_driver(child, driver); 116 bus_set_resource(child, SYS_RES_IOPORT, 117 0, iobase, AHC_EISA_IOSIZE); 118 } 119 } 120 bus_release_resource(parent, SYS_RES_IOPORT, rid, regs); 121 } 122 } 123 124 static int 125 ahc_isa_probe(device_t dev) 126 { 127 struct aic7770_identity *entry; 128 bus_space_tag_t tag; 129 bus_space_handle_t bsh; 130 struct resource *regs; 131 struct resource *irq; 132 uint32_t iobase; 133 u_int intdef; 134 u_int hcntrl; 135 int irq_num; 136 int error; 137 int zero; 138 139 error = ENXIO; 140 zero = 0; 141 regs = NULL; 142 irq = NULL; 143 144 /* Skip probes for ISA PnP devices */ 145 if (isa_get_logicalid(dev) != 0) 146 return (error); 147 148 regs = bus_alloc_resource_any(dev, SYS_RES_IOPORT, &zero, RF_ACTIVE); 149 if (regs == NULL) { 150 device_printf(dev, "No resources allocated.\n"); 151 return (ENOMEM); 152 } 153 154 iobase = rman_get_start(regs); 155 tag = rman_get_bustag(regs); 156 bsh = rman_get_bushandle(regs); 157 158 entry = ahc_isa_find_device(tag, bsh); 159 if (entry == NULL) 160 goto cleanup; 161 162 /* Pause the card preseving the IRQ type */ 163 hcntrl = bus_space_read_1(tag, bsh, HCNTRL) & IRQMS; 164 bus_space_write_1(tag, bsh, HCNTRL, hcntrl | PAUSE); 165 while ((bus_space_read_1(tag, bsh, HCNTRL) & PAUSE) == 0) 166 ; 167 168 /* Make sure we have a valid interrupt vector */ 169 intdef = bus_space_read_1(tag, bsh, INTDEF); 170 irq_num = intdef & VECTOR; 171 switch (irq_num) { 172 case 9: 173 case 10: 174 case 11: 175 case 12: 176 case 14: 177 case 15: 178 break; 179 default: 180 device_printf(dev, "@0x%x: illegal irq setting %d\n", 181 iobase, irq_num); 182 goto cleanup; 183 } 184 185 if (bus_set_resource(dev, SYS_RES_IRQ, zero, irq_num, 1) != 0) 186 goto cleanup; 187 188 /* 189 * The 284X only supports edge triggered interrupts, 190 * so do not claim RF_SHAREABLE. 191 */ 192 irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &zero, 193 0 /*!(RF_ACTIVE|RF_SHAREABLE)*/); 194 if (irq != NULL) { 195 error = 0; 196 device_set_desc(dev, entry->name); 197 } else 198 device_printf(dev, "@0x%x: irq %d allocation failed\n", 199 iobase, irq_num); 200 201 cleanup: 202 if (regs != NULL) { 203 bus_release_resource(dev, SYS_RES_IOPORT, zero, regs); 204 regs = NULL; 205 } 206 207 if (irq != NULL) { 208 bus_release_resource(dev, SYS_RES_IRQ, zero, irq); 209 irq = NULL; 210 } 211 212 return (error); 213 } 214 215 static int 216 ahc_isa_attach(device_t dev) 217 { 218 struct aic7770_identity *entry; 219 bus_space_tag_t tag; 220 bus_space_handle_t bsh; 221 struct resource *regs; 222 struct ahc_softc *ahc; 223 char *name; 224 int zero; 225 int error; 226 227 zero = 0; 228 regs = bus_alloc_resource_any(dev, SYS_RES_IOPORT, &zero, RF_ACTIVE); 229 if (regs == NULL) 230 return (ENOMEM); 231 232 tag = rman_get_bustag(regs); 233 bsh = rman_get_bushandle(regs); 234 entry = ahc_isa_find_device(tag, bsh); 235 bus_release_resource(dev, SYS_RES_IOPORT, zero, regs); 236 if (entry == NULL) 237 return (ENODEV); 238 239 /* 240 * Allocate a softc for this card and 241 * set it up for attachment by our 242 * common detect routine. 243 */ 244 name = malloc(strlen(device_get_nameunit(dev)) + 1, M_DEVBUF, M_NOWAIT); 245 if (name == NULL) 246 return (ENOMEM); 247 strcpy(name, device_get_nameunit(dev)); 248 ahc = ahc_alloc(dev, name); 249 if (ahc == NULL) 250 return (ENOMEM); 251 252 ahc_set_unit(ahc, device_get_unit(dev)); 253 254 /* Allocate a dmatag for our SCB DMA maps */ 255 error = aic_dma_tag_create(ahc, /*parent*/bus_get_dma_tag(dev), 256 /*alignment*/1, /*boundary*/0, 257 /*lowaddr*/BUS_SPACE_MAXADDR_32BIT, 258 /*highaddr*/BUS_SPACE_MAXADDR, 259 /*filter*/NULL, /*filterarg*/NULL, 260 /*maxsize*/BUS_SPACE_MAXSIZE_32BIT, 261 /*nsegments*/AHC_NSEG, 262 /*maxsegsz*/AHC_MAXTRANSFER_SIZE, 263 /*flags*/0, 264 &ahc->parent_dmat); 265 266 if (error != 0) { 267 printf("ahc_isa_attach: Could not allocate DMA tag " 268 "- error %d\n", error); 269 ahc_free(ahc); 270 return (ENOMEM); 271 } 272 ahc->dev_softc = dev; 273 error = aic7770_config(ahc, entry, /*unused ioport arg*/0); 274 if (error != 0) { 275 ahc_free(ahc); 276 return (error); 277 } 278 279 ahc_attach(ahc); 280 return (0); 281 } 282 283 static device_method_t ahc_isa_device_methods[] = { 284 /* Device interface */ 285 DEVMETHOD(device_identify, ahc_isa_identify), 286 DEVMETHOD(device_probe, ahc_isa_probe), 287 DEVMETHOD(device_attach, ahc_isa_attach), 288 DEVMETHOD(device_detach, ahc_detach), 289 { 0, 0 } 290 }; 291 292 static driver_t ahc_isa_driver = { 293 "ahc", 294 ahc_isa_device_methods, 295 sizeof(struct ahc_softc) 296 }; 297 298 DRIVER_MODULE(ahc_isa, isa, ahc_isa_driver, 0, 0); 299 MODULE_DEPEND(ahc_isa, ahc, 1, 1, 1); 300 MODULE_VERSION(ahc_isa, 1); 301