Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/dev/aic7xxx/ahc_isa.c
Version:
- FREEBSD - FREEBSD-13-STABLE - FREEBSD-13-0 - FREEBSD-12-STABLE - FREEBSD-12-0 - FREEBSD-11-STABLE - FREEBSD-11-0 - FREEBSD-10-STABLE - FREEBSD-10-0 - FREEBSD-9-STABLE - FREEBSD-9-0 - FREEBSD-8-STABLE - FREEBSD-8-0 - FREEBSD-7-STABLE - FREEBSD-7-0 - FREEBSD-6-STABLE - FREEBSD-6-0 - FREEBSD-5-STABLE - FREEBSD-5-0 - FREEBSD-4-STABLE - FREEBSD-3-STABLE - FREEBSD22 - l41 - OPENBSD - linux-2.6 - MK84 - PLAN9 - xnu-8792
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1 /*- 2 * FreeBSD, VLB/ISA product support functions 3 * 4 * Copyright (c) 2004 Justin T. Gibbs. 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 * without modification. 13 * 2. Redistributions in binary form must reproduce at minimum a disclaimer 14 * substantially similar to the "NO WARRANTY" disclaimer below 15 * ("Disclaimer") and any redistribution must be conditioned upon 16 * including a substantially similar Disclaimer requirement for further 17 * binary redistribution. 18 * 3. Neither the names of the above-listed copyright holders nor the names 19 * of any contributors may be used to endorse or promote products derived 20 * from this software without specific prior written permission. 21 * 22 * NO WARRANTY 23 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 24 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 25 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR 26 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 27 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 31 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 32 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 33 * POSSIBILITY OF SUCH DAMAGES. 34 * 35 * $Id$ 36 */ 37 38 #include <sys/cdefs.h> 39 __FBSDID("$FreeBSD: releng/8.4/sys/dev/aic7xxx/ahc_isa.c 233025 2012-03-16 09:22:59Z scottl $"); 40 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 47 static struct aic7770_identity *ahc_isa_find_device(bus_space_tag_t tag, 48 bus_space_handle_t bsh); 49 static void ahc_isa_identify(driver_t *driver, 50 device_t parent); 51 static int ahc_isa_probe(device_t dev); 52 static int ahc_isa_attach(device_t dev); 53 54 /* 55 * Perform an EISA probe of the address with the addition 56 * of a "priming" step. The 284X requires priming (a write 57 * to offset 0x80, the first EISA ID register) to ensure it 58 * is not mistaken as an EISA card. Once we have the ID, 59 * lookup the controller in the aic7770 table of supported 60 * devices. 61 */ 62 static struct aic7770_identity * 63 ahc_isa_find_device(bus_space_tag_t tag, bus_space_handle_t bsh) { 64 uint32_t id; 65 u_int id_size; 66 int i; 67 68 id = 0; 69 id_size = sizeof(id); 70 for (i = 0; i < id_size; i++) { 71 bus_space_write_1(tag, bsh, 0x80, 0x80 + i); 72 id |= bus_space_read_1(tag, bsh, 0x80 + i) 73 << ((id_size - i - 1) * CHAR_BIT); 74 } 75 76 return (aic7770_find_device(id)); 77 } 78 79 static void 80 ahc_isa_identify(driver_t *driver, device_t parent) 81 { 82 int slot; 83 int max_slot; 84 85 max_slot = 14; 86 for (slot = 0; slot <= max_slot; slot++) { 87 struct aic7770_identity *entry; 88 bus_space_tag_t tag; 89 bus_space_handle_t bsh; 90 struct resource *regs; 91 uint32_t iobase; 92 int rid; 93 94 rid = 0; 95 iobase = (slot * AHC_EISA_SLOT_SIZE) + AHC_EISA_SLOT_OFFSET; 96 regs = bus_alloc_resource(parent, SYS_RES_IOPORT, &rid, 97 iobase, iobase, AHC_EISA_IOSIZE, 98 RF_ACTIVE); 99 if (regs == NULL) { 100 if (bootverbose) 101 printf("ahc_isa_probe %d: ioport 0x%x " 102 "alloc failed\n", slot, iobase); 103 continue; 104 } 105 106 tag = rman_get_bustag(regs); 107 bsh = rman_get_bushandle(regs); 108 109 entry = ahc_isa_find_device(tag, bsh); 110 if (entry != NULL) { 111 device_t child; 112 113 child = BUS_ADD_CHILD(parent, ISA_ORDER_SPECULATIVE, 114 "ahc", -1); 115 if (child != NULL) { 116 device_set_driver(child, driver); 117 bus_set_resource(child, SYS_RES_IOPORT, 118 0, iobase, AHC_EISA_IOSIZE); 119 } 120 } 121 bus_release_resource(parent, SYS_RES_IOPORT, rid, regs); 122 } 123 } 124 125 static int 126 ahc_isa_probe(device_t dev) 127 { 128 struct aic7770_identity *entry; 129 bus_space_tag_t tag; 130 bus_space_handle_t bsh; 131 struct resource *regs; 132 struct resource *irq; 133 uint32_t iobase; 134 u_int intdef; 135 u_int hcntrl; 136 int irq_num; 137 int error; 138 int zero; 139 140 error = ENXIO; 141 zero = 0; 142 regs = NULL; 143 irq = NULL; 144 145 /* Skip probes for ISA PnP devices */ 146 if (isa_get_logicalid(dev) != 0) 147 return (error); 148 149 regs = bus_alloc_resource_any(dev, SYS_RES_IOPORT, &zero, RF_ACTIVE); 150 if (regs == NULL) { 151 device_printf(dev, "No resources allocated.\n"); 152 return (ENOMEM); 153 } 154 155 iobase = rman_get_start(regs); 156 tag = rman_get_bustag(regs); 157 bsh = rman_get_bushandle(regs); 158 159 entry = ahc_isa_find_device(tag, bsh); 160 if (entry == NULL) 161 goto cleanup; 162 163 /* Pause the card preseving the IRQ type */ 164 hcntrl = bus_space_read_1(tag, bsh, HCNTRL) & IRQMS; 165 bus_space_write_1(tag, bsh, HCNTRL, hcntrl | PAUSE); 166 while ((bus_space_read_1(tag, bsh, HCNTRL) & PAUSE) == 0) 167 ; 168 169 /* Make sure we have a valid interrupt vector */ 170 intdef = bus_space_read_1(tag, bsh, INTDEF); 171 irq_num = intdef & VECTOR; 172 switch (irq_num) { 173 case 9: 174 case 10: 175 case 11: 176 case 12: 177 case 14: 178 case 15: 179 break; 180 default: 181 device_printf(dev, "@0x%x: illegal irq setting %d\n", 182 iobase, irq_num); 183 goto cleanup; 184 } 185 186 if (bus_set_resource(dev, SYS_RES_IRQ, zero, irq_num, 1) != 0) 187 goto cleanup; 188 189 /* 190 * The 284X only supports edge triggered interrupts, 191 * so do not claim RF_SHAREABLE. 192 */ 193 irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &zero, 194 0 /*!(RF_ACTIVE|RF_SHAREABLE)*/); 195 if (irq != NULL) { 196 error = 0; 197 device_set_desc(dev, entry->name); 198 } else 199 device_printf(dev, "@0x%x: irq %d allocation failed\n", 200 iobase, irq_num); 201 202 cleanup: 203 if (regs != NULL) { 204 bus_release_resource(dev, SYS_RES_IOPORT, zero, regs); 205 regs = NULL; 206 } 207 208 if (irq != NULL) { 209 bus_release_resource(dev, SYS_RES_IRQ, zero, irq); 210 irq = NULL; 211 } 212 213 return (error); 214 } 215 216 static int 217 ahc_isa_attach(device_t dev) 218 { 219 struct aic7770_identity *entry; 220 bus_space_tag_t tag; 221 bus_space_handle_t bsh; 222 struct resource *regs; 223 struct ahc_softc *ahc; 224 char *name; 225 int zero; 226 int error; 227 228 zero = 0; 229 regs = bus_alloc_resource_any(dev, SYS_RES_IOPORT, &zero, RF_ACTIVE); 230 if (regs == NULL) 231 return (ENOMEM); 232 233 tag = rman_get_bustag(regs); 234 bsh = rman_get_bushandle(regs); 235 entry = ahc_isa_find_device(tag, bsh); 236 bus_release_resource(dev, SYS_RES_IOPORT, zero, regs); 237 if (entry == NULL) 238 return (ENODEV); 239 240 /* 241 * Allocate a softc for this card and 242 * set it up for attachment by our 243 * common detect routine. 244 */ 245 name = malloc(strlen(device_get_nameunit(dev)) + 1, M_DEVBUF, M_NOWAIT); 246 if (name == NULL) 247 return (ENOMEM); 248 strcpy(name, device_get_nameunit(dev)); 249 ahc = ahc_alloc(dev, name); 250 if (ahc == NULL) 251 return (ENOMEM); 252 253 ahc_set_unit(ahc, device_get_unit(dev)); 254 255 /* Allocate a dmatag for our SCB DMA maps */ 256 error = aic_dma_tag_create(ahc, /*parent*/bus_get_dma_tag(dev), 257 /*alignment*/1, /*boundary*/0, 258 /*lowaddr*/BUS_SPACE_MAXADDR_32BIT, 259 /*highaddr*/BUS_SPACE_MAXADDR, 260 /*filter*/NULL, /*filterarg*/NULL, 261 /*maxsize*/BUS_SPACE_MAXSIZE_32BIT, 262 /*nsegments*/AHC_NSEG, 263 /*maxsegsz*/AHC_MAXTRANSFER_SIZE, 264 /*flags*/0, 265 &ahc->parent_dmat); 266 267 if (error != 0) { 268 printf("ahc_isa_attach: Could not allocate DMA tag " 269 "- error %d\n", error); 270 ahc_free(ahc); 271 return (ENOMEM); 272 } 273 ahc->dev_softc = dev; 274 error = aic7770_config(ahc, entry, /*unused ioport arg*/0); 275 if (error != 0) { 276 ahc_free(ahc); 277 return (error); 278 } 279 280 ahc_attach(ahc); 281 return (0); 282 } 283 284 static device_method_t ahc_isa_device_methods[] = { 285 /* Device interface */ 286 DEVMETHOD(device_identify, ahc_isa_identify), 287 DEVMETHOD(device_probe, ahc_isa_probe), 288 DEVMETHOD(device_attach, ahc_isa_attach), 289 DEVMETHOD(device_detach, ahc_detach), 290 { 0, 0 } 291 }; 292 293 static driver_t ahc_isa_driver = { 294 "ahc", 295 ahc_isa_device_methods, 296 sizeof(struct ahc_softc) 297 }; 298 299 DRIVER_MODULE(ahc_isa, isa, ahc_isa_driver, ahc_devclass, 0, 0); 300 MODULE_DEPEND(ahc_isa, ahc, 1, 1, 1); 301 MODULE_VERSION(ahc_isa, 1);
Cache object: 6863393c4b800ed5a664ea8bc89985a3
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