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