1 /*- 2 * FreeBSD, PCI product support functions 3 * 4 * Copyright (c) 1995-2001 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, immediately at the beginning of the file. 13 * 2. The name of the author may not be used to endorse or promote products 14 * derived from this software without specific prior written permission. 15 * 16 * Alternatively, this software may be distributed under the terms of the 17 * GNU Public License ("GPL"). 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR 23 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 * 31 * $Id: //depot/aic7xxx/freebsd/dev/aic7xxx/ahc_pci.c#19 $ 32 */ 33 34 #include <dev/aic7xxx/aic7xxx_osm.h> 35 36 static int ahc_pci_probe(device_t dev); 37 static int ahc_pci_attach(device_t dev); 38 39 static device_method_t ahc_pci_device_methods[] = { 40 /* Device interface */ 41 DEVMETHOD(device_probe, ahc_pci_probe), 42 DEVMETHOD(device_attach, ahc_pci_attach), 43 DEVMETHOD(device_detach, ahc_detach), 44 { 0, 0 } 45 }; 46 47 static driver_t ahc_pci_driver = { 48 "ahc", 49 ahc_pci_device_methods, 50 sizeof(struct ahc_softc) 51 }; 52 53 DRIVER_MODULE(ahc_pci, pci, ahc_pci_driver, 0, 0); 54 MODULE_DEPEND(ahc_pci, ahc, 1, 1, 1); 55 MODULE_VERSION(ahc_pci, 1); 56 57 static int 58 ahc_pci_probe(device_t dev) 59 { 60 struct ahc_pci_identity *entry; 61 62 entry = ahc_find_pci_device(dev); 63 if (entry != NULL) { 64 device_set_desc(dev, entry->name); 65 return (BUS_PROBE_DEFAULT); 66 } 67 return (ENXIO); 68 } 69 70 static int 71 ahc_pci_attach(device_t dev) 72 { 73 struct ahc_pci_identity *entry; 74 struct ahc_softc *ahc; 75 char *name; 76 int error; 77 78 entry = ahc_find_pci_device(dev); 79 if (entry == NULL) 80 return (ENXIO); 81 82 /* 83 * Allocate a softc for this card and 84 * set it up for attachment by our 85 * common detect routine. 86 */ 87 name = malloc(strlen(device_get_nameunit(dev)) + 1, M_DEVBUF, M_NOWAIT); 88 if (name == NULL) 89 return (ENOMEM); 90 strcpy(name, device_get_nameunit(dev)); 91 ahc = ahc_alloc(dev, name); 92 if (ahc == NULL) 93 return (ENOMEM); 94 95 ahc_set_unit(ahc, device_get_unit(dev)); 96 97 /* 98 * Should we bother disabling 39Bit addressing 99 * based on installed memory? 100 */ 101 if (sizeof(bus_addr_t) > 4) 102 ahc->flags |= AHC_39BIT_ADDRESSING; 103 104 /* Allocate a dmatag for our SCB DMA maps */ 105 error = aic_dma_tag_create(ahc, /*parent*/bus_get_dma_tag(dev), 106 /*alignment*/1, /*boundary*/0, 107 (ahc->flags & AHC_39BIT_ADDRESSING) 108 ? 0x7FFFFFFFFFLL 109 : BUS_SPACE_MAXADDR_32BIT, 110 /*highaddr*/BUS_SPACE_MAXADDR, 111 /*filter*/NULL, /*filterarg*/NULL, 112 /*maxsize*/BUS_SPACE_MAXSIZE_32BIT, 113 /*nsegments*/AHC_NSEG, 114 /*maxsegsz*/AHC_MAXTRANSFER_SIZE, 115 /*flags*/0, 116 &ahc->parent_dmat); 117 118 if (error != 0) { 119 printf("ahc_pci_attach: Could not allocate DMA tag " 120 "- error %d\n", error); 121 ahc_free(ahc); 122 return (ENOMEM); 123 } 124 ahc->dev_softc = dev; 125 error = ahc_pci_config(ahc, entry); 126 if (error != 0) { 127 ahc_free(ahc); 128 return (error); 129 } 130 131 ahc_attach(ahc); 132 return (0); 133 } 134 135 int 136 ahc_pci_map_registers(struct ahc_softc *ahc) 137 { 138 struct resource *regs; 139 int regs_type; 140 int regs_id; 141 int allow_memio; 142 143 regs = NULL; 144 regs_type = 0; 145 regs_id = 0; 146 147 /* Retrieve the per-device 'allow_memio' hint */ 148 if (resource_int_value(device_get_name(ahc->dev_softc), 149 device_get_unit(ahc->dev_softc), 150 "allow_memio", &allow_memio) != 0) { 151 if (bootverbose) 152 device_printf(ahc->dev_softc, "Defaulting to MEMIO "); 153 #ifdef AHC_ALLOW_MEMIO 154 if (bootverbose) 155 printf("on\n"); 156 allow_memio = 1; 157 #else 158 if (bootverbose) 159 printf("off\n"); 160 allow_memio = 0; 161 #endif 162 } 163 164 if (allow_memio != 0) { 165 regs_type = SYS_RES_MEMORY; 166 regs_id = AHC_PCI_MEMADDR; 167 regs = bus_alloc_resource_any(ahc->dev_softc, regs_type, 168 ®s_id, RF_ACTIVE); 169 if (regs != NULL) { 170 ahc->tag = rman_get_bustag(regs); 171 ahc->bsh = rman_get_bushandle(regs); 172 173 /* 174 * Do a quick test to see if memory mapped 175 * I/O is functioning correctly. 176 */ 177 if (ahc_pci_test_register_access(ahc) != 0) { 178 device_printf(ahc->dev_softc, 179 "PCI Device %d:%d:%d failed memory " 180 "mapped test. Using PIO.\n", 181 aic_get_pci_bus(ahc->dev_softc), 182 aic_get_pci_slot(ahc->dev_softc), 183 aic_get_pci_function(ahc->dev_softc)); 184 bus_release_resource(ahc->dev_softc, regs_type, 185 regs_id, regs); 186 regs = NULL; 187 } 188 } 189 } 190 191 if (regs == NULL) { 192 regs_type = SYS_RES_IOPORT; 193 regs_id = AHC_PCI_IOADDR; 194 regs = bus_alloc_resource_any(ahc->dev_softc, regs_type, 195 ®s_id, RF_ACTIVE); 196 if (regs != NULL) { 197 ahc->tag = rman_get_bustag(regs); 198 ahc->bsh = rman_get_bushandle(regs); 199 if (ahc_pci_test_register_access(ahc) != 0) { 200 device_printf(ahc->dev_softc, 201 "PCI Device %d:%d:%d failed I/O " 202 "mapped test.\n", 203 aic_get_pci_bus(ahc->dev_softc), 204 aic_get_pci_slot(ahc->dev_softc), 205 aic_get_pci_function(ahc->dev_softc)); 206 bus_release_resource(ahc->dev_softc, regs_type, 207 regs_id, regs); 208 regs = NULL; 209 } 210 } 211 } 212 if (regs == NULL) { 213 device_printf(ahc->dev_softc, 214 "can't allocate register resources\n"); 215 return (ENOMEM); 216 } 217 ahc->platform_data->regs_res_type = regs_type; 218 ahc->platform_data->regs_res_id = regs_id; 219 ahc->platform_data->regs = regs; 220 return (0); 221 } 222