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 <dev/aic7xxx/aic7xxx_osm.h> 41 42#include <sys/limits.h> /* For CHAR_BIT*/ 43#include <isa/isavar.h> /* For ISA attach glue */ 44 45static struct aic7770_identity *ahc_isa_find_device(bus_space_tag_t tag, 46 bus_space_handle_t bsh); 47static void ahc_isa_identify(driver_t *driver, 48 device_t parent); 49static int ahc_isa_probe(device_t dev); 50static int ahc_isa_attach(device_t dev); 51 52/* 53 * Perform an EISA probe of the address with the addition 54 * of a "priming" step. The 284X requires priming (a write 55 * to offset 0x80, the first EISA ID register) to ensure it 56 * is not mistaken as an EISA card. Once we have the ID, 57 * lookup the controller in the aic7770 table of supported 58 * devices. 59 */ 60static struct aic7770_identity * 61ahc_isa_find_device(bus_space_tag_t tag, bus_space_handle_t bsh) { 62 uint32_t id; 63 u_int id_size; 64 int i; 65 66 id = 0; 67 id_size = sizeof(id); 68 for (i = 0; i < id_size; i++) { 69 bus_space_write_1(tag, bsh, 0x80, 0x80 + i); 70 id |= bus_space_read_1(tag, bsh, 0x80 + i) 71 << ((id_size - i - 1) * CHAR_BIT); 72 } 73 74 return (aic7770_find_device(id)); 75} 76 77static void 78ahc_isa_identify(driver_t *driver, device_t parent) 79{ 80 int slot; 81 int max_slot; 82 83 max_slot = 14; 84 for (slot = 0; slot <= max_slot; slot++) { 85 struct aic7770_identity *entry; 86 bus_space_tag_t tag; 87 bus_space_handle_t bsh; 88 struct resource *regs; 89 uint32_t iobase; 90 int rid; 91 92 rid = 0; 93 iobase = (slot * AHC_EISA_SLOT_SIZE) + AHC_EISA_SLOT_OFFSET; 94 regs = bus_alloc_resource(parent, SYS_RES_IOPORT, &rid, 95 iobase, iobase, AHC_EISA_IOSIZE, 96 RF_ACTIVE); 97 if (regs == NULL) { 98 if (bootverbose) 99 printf("ahc_isa_identify %d: ioport 0x%x " 100 "alloc failed\n", slot, iobase); 101 continue; 102 } 103 104 tag = rman_get_bustag(regs); 105 bsh = rman_get_bushandle(regs); 106 107 entry = ahc_isa_find_device(tag, bsh); 108 if (entry != NULL) { 109 device_t child; 110 111 child = BUS_ADD_CHILD(parent, ISA_ORDER_SPECULATIVE, 112 "ahc", -1); 113 if (child != NULL) { 114 device_set_driver(child, driver); 115 bus_set_resource(child, SYS_RES_IOPORT, 116 0, iobase, AHC_EISA_IOSIZE); 117 } 118 } 119 bus_release_resource(parent, SYS_RES_IOPORT, rid, regs); 120 } 121} 122 123static int 124ahc_isa_probe(device_t dev) 125{ 126 struct aic7770_identity *entry; 127 bus_space_tag_t tag; 128 bus_space_handle_t bsh; 129 struct resource *regs; 130 struct resource *irq; 131 uint32_t iobase; 132 u_int intdef; 133 u_int hcntrl; 134 int irq_num; 135 int error; 136 int zero; 137 138 error = ENXIO; 139 zero = 0; 140 regs = NULL; 141 irq = NULL; 142 143 /* Skip probes for ISA PnP devices */ 144 if (isa_get_logicalid(dev) != 0) 145 return (error); 146 147 regs = bus_alloc_resource_any(dev, SYS_RES_IOPORT, &zero, RF_ACTIVE); 148 if (regs == NULL) { 149 device_printf(dev, "No resources allocated.\n"); 150 return (ENOMEM); 151 } 152 153 iobase = rman_get_start(regs); 154 tag = rman_get_bustag(regs); 155 bsh = rman_get_bushandle(regs); 156 157 entry = ahc_isa_find_device(tag, bsh); 158 if (entry == NULL) 159 goto cleanup; 160 161 /* Pause the card preseving the IRQ type */ 162 hcntrl = bus_space_read_1(tag, bsh, HCNTRL) & IRQMS; 163 bus_space_write_1(tag, bsh, HCNTRL, hcntrl | PAUSE); 164 while ((bus_space_read_1(tag, bsh, HCNTRL) & PAUSE) == 0) 165 ; 166 167 /* Make sure we have a valid interrupt vector */ 168 intdef = bus_space_read_1(tag, bsh, INTDEF); 169 irq_num = intdef & VECTOR; 170 switch (irq_num) { 171 case 9: 172 case 10: 173 case 11: 174 case 12: 175 case 14: 176 case 15: 177 break; 178 default: 179 device_printf(dev, "@0x%x: illegal irq setting %d\n", 180 iobase, irq_num); 181 goto cleanup; 182 } 183 184 if (bus_set_resource(dev, SYS_RES_IRQ, zero, irq_num, 1) != 0) 185 goto cleanup; 186 187 /* 188 * The 284X only supports edge triggered interrupts, 189 * so do not claim RF_SHAREABLE. 190 */ 191 irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &zero, 192 0 /*!(RF_ACTIVE|RF_SHAREABLE)*/); 193 if (irq != NULL) { 194 error = 0; 195 device_set_desc(dev, entry->name); 196 } else 197 device_printf(dev, "@0x%x: irq %d allocation failed\n", 198 iobase, irq_num); 199 200cleanup: 201 if (regs != NULL) { 202 bus_release_resource(dev, SYS_RES_IOPORT, zero, regs); 203 regs = NULL; 204 } 205 206 if (irq != NULL) { 207 bus_release_resource(dev, SYS_RES_IRQ, zero, irq); 208 irq = NULL; 209 } 210 211 return (error); 212} 213 214static int 215ahc_isa_attach(device_t dev) 216{ 217 struct aic7770_identity *entry; 218 bus_space_tag_t tag; 219 bus_space_handle_t bsh; 220 struct resource *regs; 221 struct ahc_softc *ahc; 222 char *name; 223 int zero; 224 int error; 225 226 zero = 0; 227 regs = bus_alloc_resource_any(dev, SYS_RES_IOPORT, &zero, RF_ACTIVE); 228 if (regs == NULL) 229 return (ENOMEM); 230 231 tag = rman_get_bustag(regs); 232 bsh = rman_get_bushandle(regs); 233 entry = ahc_isa_find_device(tag, bsh); 234 bus_release_resource(dev, SYS_RES_IOPORT, zero, regs); 235 if (entry == NULL) 236 return (ENODEV); 237 238 /* 239 * Allocate a softc for this card and 240 * set it up for attachment by our 241 * common detect routine. 242 */ 243 name = malloc(strlen(device_get_nameunit(dev)) + 1, M_DEVBUF, M_NOWAIT); 244 if (name == NULL) 245 return (ENOMEM); 246 strcpy(name, device_get_nameunit(dev)); 247 ahc = ahc_alloc(dev, name); 248 if (ahc == NULL) 249 return (ENOMEM); 250 251 ahc_set_unit(ahc, device_get_unit(dev)); 252 253 /* Allocate a dmatag for our SCB DMA maps */ 254 error = aic_dma_tag_create(ahc, /*parent*/bus_get_dma_tag(dev), 255 /*alignment*/1, /*boundary*/0, 256 /*lowaddr*/BUS_SPACE_MAXADDR_32BIT, 257 /*highaddr*/BUS_SPACE_MAXADDR, 258 /*filter*/NULL, /*filterarg*/NULL, 259 /*maxsize*/BUS_SPACE_MAXSIZE_32BIT, 260 /*nsegments*/AHC_NSEG, 261 /*maxsegsz*/AHC_MAXTRANSFER_SIZE, 262 /*flags*/0, 263 &ahc->parent_dmat); 264 265 if (error != 0) { 266 printf("ahc_isa_attach: Could not allocate DMA tag " 267 "- error %d\n", error); 268 ahc_free(ahc); 269 return (ENOMEM); 270 } 271 ahc->dev_softc = dev; 272 error = aic7770_config(ahc, entry, /*unused ioport arg*/0); 273 if (error != 0) { 274 ahc_free(ahc); 275 return (error); 276 } 277 278 ahc_attach(ahc); 279 return (0); 280} 281 282static device_method_t ahc_isa_device_methods[] = { 283 /* Device interface */ 284 DEVMETHOD(device_identify, ahc_isa_identify), 285 DEVMETHOD(device_probe, ahc_isa_probe), 286 DEVMETHOD(device_attach, ahc_isa_attach), 287 DEVMETHOD(device_detach, ahc_detach), 288 { 0, 0 } 289}; 290 291static driver_t ahc_isa_driver = { 292 "ahc", 293 ahc_isa_device_methods, 294 sizeof(struct ahc_softc) 295}; 296 297DRIVER_MODULE(ahc_isa, isa, ahc_isa_driver, 0, 0); 298MODULE_DEPEND(ahc_isa, ahc, 1, 1, 1); 299MODULE_VERSION(ahc_isa, 1); 300