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 __FBSDID("$FreeBSD$"); 42 43 #include <dev/aic7xxx/aic7xxx_osm.h> 44 45 #include <sys/limits.h> /* For CHAR_BIT*/ 46 #include <isa/isavar.h> /* For ISA attach glue */ 47 48 49 static struct aic7770_identity *ahc_isa_find_device(bus_space_tag_t tag, 50 bus_space_handle_t bsh); 51 static void ahc_isa_identify(driver_t *driver, 52 device_t parent); 53 static int ahc_isa_probe(device_t dev); 54 static int ahc_isa_attach(device_t dev); 55 56 /* 57 * Perform an EISA probe of the address with the addition 58 * of a "priming" step. The 284X requires priming (a write 59 * to offset 0x80, the first EISA ID register) to ensure it 60 * is not mistaken as an EISA card. Once we have the ID, 61 * lookup the controller in the aic7770 table of supported 62 * devices. 63 */ 64 static struct aic7770_identity * 65 ahc_isa_find_device(bus_space_tag_t tag, bus_space_handle_t bsh) { 66 uint32_t id; 67 u_int id_size; 68 int i; 69 70 id = 0; 71 id_size = sizeof(id); 72 for (i = 0; i < id_size; i++) { 73 bus_space_write_1(tag, bsh, 0x80, 0x80 + i); 74 id |= bus_space_read_1(tag, bsh, 0x80 + i) 75 << ((id_size - i - 1) * CHAR_BIT); 76 } 77 78 return (aic7770_find_device(id)); 79 } 80 81 static void 82 ahc_isa_identify(driver_t *driver, device_t parent) 83 { 84 int slot; 85 int max_slot; 86 87 max_slot = 14; 88 for (slot = 0; slot <= max_slot; slot++) { 89 struct aic7770_identity *entry; 90 bus_space_tag_t tag; 91 bus_space_handle_t bsh; 92 struct resource *regs; 93 uint32_t iobase; 94 int rid; 95 96 rid = 0; 97 iobase = (slot * AHC_EISA_SLOT_SIZE) + AHC_EISA_SLOT_OFFSET; 98 regs = bus_alloc_resource(parent, SYS_RES_IOPORT, &rid, 99 iobase, iobase, AHC_EISA_IOSIZE, 100 RF_ACTIVE); 101 if (regs == NULL) { 102 if (bootverbose) 103 printf("ahc_isa_identify %d: ioport 0x%x " 104 "alloc failed\n", slot, iobase); 105 continue; 106 } 107 108 tag = rman_get_bustag(regs); 109 bsh = rman_get_bushandle(regs); 110 111 entry = ahc_isa_find_device(tag, bsh); 112 if (entry != NULL) { 113 device_t child; 114 115 child = BUS_ADD_CHILD(parent, ISA_ORDER_SPECULATIVE, 116 "ahc", -1); 117 if (child != NULL) { 118 device_set_driver(child, driver); 119 bus_set_resource(child, SYS_RES_IOPORT, 120 0, iobase, AHC_EISA_IOSIZE); 121 } 122 } 123 bus_release_resource(parent, SYS_RES_IOPORT, rid, regs); 124 } 125 } 126 127 static int 128 ahc_isa_probe(device_t dev) 129 { 130 struct aic7770_identity *entry; 131 bus_space_tag_t tag; 132 bus_space_handle_t bsh; 133 struct resource *regs; 134 struct resource *irq; 135 uint32_t iobase; 136 u_int intdef; 137 u_int hcntrl; 138 int irq_num; 139 int error; 140 int zero; 141 142 error = ENXIO; 143 zero = 0; 144 regs = NULL; 145 irq = NULL; 146 147 /* Skip probes for ISA PnP devices */ 148 if (isa_get_logicalid(dev) != 0) 149 return (error); 150 151 regs = bus_alloc_resource_any(dev, SYS_RES_IOPORT, &zero, RF_ACTIVE); 152 if (regs == NULL) { 153 device_printf(dev, "No resources allocated.\n"); 154 return (ENOMEM); 155 } 156 157 iobase = rman_get_start(regs); 158 tag = rman_get_bustag(regs); 159 bsh = rman_get_bushandle(regs); 160 161 entry = ahc_isa_find_device(tag, bsh); 162 if (entry == NULL) 163 goto cleanup; 164 165 /* Pause the card preseving the IRQ type */ 166 hcntrl = bus_space_read_1(tag, bsh, HCNTRL) & IRQMS; 167 bus_space_write_1(tag, bsh, HCNTRL, hcntrl | PAUSE); 168 while ((bus_space_read_1(tag, bsh, HCNTRL) & PAUSE) == 0) 169 ; 170 171 /* Make sure we have a valid interrupt vector */ 172 intdef = bus_space_read_1(tag, bsh, INTDEF); 173 irq_num = intdef & VECTOR; 174 switch (irq_num) { 175 case 9: 176 case 10: 177 case 11: 178 case 12: 179 case 14: 180 case 15: 181 break; 182 default: 183 device_printf(dev, "@0x%x: illegal irq setting %d\n", 184 iobase, irq_num); 185 goto cleanup; 186 } 187 188 if (bus_set_resource(dev, SYS_RES_IRQ, zero, irq_num, 1) != 0) 189 goto cleanup; 190 191 /* 192 * The 284X only supports edge triggered interrupts, 193 * so do not claim RF_SHAREABLE. 194 */ 195 irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &zero, 196 0 /*!(RF_ACTIVE|RF_SHAREABLE)*/); 197 if (irq != NULL) { 198 error = 0; 199 device_set_desc(dev, entry->name); 200 } else 201 device_printf(dev, "@0x%x: irq %d allocation failed\n", 202 iobase, irq_num); 203 204 cleanup: 205 if (regs != NULL) { 206 bus_release_resource(dev, SYS_RES_IOPORT, zero, regs); 207 regs = NULL; 208 } 209 210 if (irq != NULL) { 211 bus_release_resource(dev, SYS_RES_IRQ, zero, irq); 212 irq = NULL; 213 } 214 215 return (error); 216 } 217 218 static int 219 ahc_isa_attach(device_t dev) 220 { 221 struct aic7770_identity *entry; 222 bus_space_tag_t tag; 223 bus_space_handle_t bsh; 224 struct resource *regs; 225 struct ahc_softc *ahc; 226 char *name; 227 int zero; 228 int error; 229 230 zero = 0; 231 regs = bus_alloc_resource_any(dev, SYS_RES_IOPORT, &zero, RF_ACTIVE); 232 if (regs == NULL) 233 return (ENOMEM); 234 235 tag = rman_get_bustag(regs); 236 bsh = rman_get_bushandle(regs); 237 entry = ahc_isa_find_device(tag, bsh); 238 bus_release_resource(dev, SYS_RES_IOPORT, zero, regs); 239 if (entry == NULL) 240 return (ENODEV); 241 242 /* 243 * Allocate a softc for this card and 244 * set it up for attachment by our 245 * common detect routine. 246 */ 247 name = malloc(strlen(device_get_nameunit(dev)) + 1, M_DEVBUF, M_NOWAIT); 248 if (name == NULL) 249 return (ENOMEM); 250 strcpy(name, device_get_nameunit(dev)); 251 ahc = ahc_alloc(dev, name); 252 if (ahc == NULL) 253 return (ENOMEM); 254 255 ahc_set_unit(ahc, device_get_unit(dev)); 256 257 /* Allocate a dmatag for our SCB DMA maps */ 258 error = aic_dma_tag_create(ahc, /*parent*/bus_get_dma_tag(dev), 259 /*alignment*/1, /*boundary*/0, 260 /*lowaddr*/BUS_SPACE_MAXADDR_32BIT, 261 /*highaddr*/BUS_SPACE_MAXADDR, 262 /*filter*/NULL, /*filterarg*/NULL, 263 /*maxsize*/BUS_SPACE_MAXSIZE_32BIT, 264 /*nsegments*/AHC_NSEG, 265 /*maxsegsz*/AHC_MAXTRANSFER_SIZE, 266 /*flags*/0, 267 &ahc->parent_dmat); 268 269 if (error != 0) { 270 printf("ahc_isa_attach: Could not allocate DMA tag " 271 "- error %d\n", error); 272 ahc_free(ahc); 273 return (ENOMEM); 274 } 275 ahc->dev_softc = dev; 276 error = aic7770_config(ahc, entry, /*unused ioport arg*/0); 277 if (error != 0) { 278 ahc_free(ahc); 279 return (error); 280 } 281 282 ahc_attach(ahc); 283 return (0); 284 } 285 286 static device_method_t ahc_isa_device_methods[] = { 287 /* Device interface */ 288 DEVMETHOD(device_identify, ahc_isa_identify), 289 DEVMETHOD(device_probe, ahc_isa_probe), 290 DEVMETHOD(device_attach, ahc_isa_attach), 291 DEVMETHOD(device_detach, ahc_detach), 292 { 0, 0 } 293 }; 294 295 static driver_t ahc_isa_driver = { 296 "ahc", 297 ahc_isa_device_methods, 298 sizeof(struct ahc_softc) 299 }; 300 301 DRIVER_MODULE(ahc_isa, isa, ahc_isa_driver, ahc_devclass, 0, 0); 302 MODULE_DEPEND(ahc_isa, ahc, 1, 1, 1); 303 MODULE_VERSION(ahc_isa, 1); 304