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 <sys/cdefs.h> 35 #include <dev/aic7xxx/aic7xxx_osm.h> 36 37 static int ahc_pci_probe(device_t dev); 38 static int ahc_pci_attach(device_t dev); 39 40 static device_method_t ahc_pci_device_methods[] = { 41 /* Device interface */ 42 DEVMETHOD(device_probe, ahc_pci_probe), 43 DEVMETHOD(device_attach, ahc_pci_attach), 44 DEVMETHOD(device_detach, ahc_detach), 45 { 0, 0 } 46 }; 47 48 static driver_t ahc_pci_driver = { 49 "ahc", 50 ahc_pci_device_methods, 51 sizeof(struct ahc_softc) 52 }; 53 54 DRIVER_MODULE(ahc_pci, pci, ahc_pci_driver, 0, 0); 55 MODULE_DEPEND(ahc_pci, ahc, 1, 1, 1); 56 MODULE_VERSION(ahc_pci, 1); 57 58 static int 59 ahc_pci_probe(device_t dev) 60 { 61 struct ahc_pci_identity *entry; 62 63 entry = ahc_find_pci_device(dev); 64 if (entry != NULL) { 65 device_set_desc(dev, entry->name); 66 return (BUS_PROBE_DEFAULT); 67 } 68 return (ENXIO); 69 } 70 71 static int 72 ahc_pci_attach(device_t dev) 73 { 74 struct ahc_pci_identity *entry; 75 struct ahc_softc *ahc; 76 char *name; 77 int error; 78 79 entry = ahc_find_pci_device(dev); 80 if (entry == NULL) 81 return (ENXIO); 82 83 /* 84 * Allocate a softc for this card and 85 * set it up for attachment by our 86 * common detect routine. 87 */ 88 name = malloc(strlen(device_get_nameunit(dev)) + 1, M_DEVBUF, M_NOWAIT); 89 if (name == NULL) 90 return (ENOMEM); 91 strcpy(name, device_get_nameunit(dev)); 92 ahc = ahc_alloc(dev, name); 93 if (ahc == NULL) 94 return (ENOMEM); 95 96 ahc_set_unit(ahc, device_get_unit(dev)); 97 98 /* 99 * Should we bother disabling 39Bit addressing 100 * based on installed memory? 101 */ 102 if (sizeof(bus_addr_t) > 4) 103 ahc->flags |= AHC_39BIT_ADDRESSING; 104 105 /* Allocate a dmatag for our SCB DMA maps */ 106 error = aic_dma_tag_create(ahc, /*parent*/bus_get_dma_tag(dev), 107 /*alignment*/1, /*boundary*/0, 108 (ahc->flags & AHC_39BIT_ADDRESSING) 109 ? 0x7FFFFFFFFFLL 110 : BUS_SPACE_MAXADDR_32BIT, 111 /*highaddr*/BUS_SPACE_MAXADDR, 112 /*filter*/NULL, /*filterarg*/NULL, 113 /*maxsize*/BUS_SPACE_MAXSIZE_32BIT, 114 /*nsegments*/AHC_NSEG, 115 /*maxsegsz*/AHC_MAXTRANSFER_SIZE, 116 /*flags*/0, 117 &ahc->parent_dmat); 118 119 if (error != 0) { 120 printf("ahc_pci_attach: Could not allocate DMA tag " 121 "- error %d\n", error); 122 ahc_free(ahc); 123 return (ENOMEM); 124 } 125 ahc->dev_softc = dev; 126 error = ahc_pci_config(ahc, entry); 127 if (error != 0) { 128 ahc_free(ahc); 129 return (error); 130 } 131 132 ahc_attach(ahc); 133 return (0); 134 } 135 136 int 137 ahc_pci_map_registers(struct ahc_softc *ahc) 138 { 139 struct resource *regs; 140 int regs_type; 141 int regs_id; 142 int allow_memio; 143 144 regs = NULL; 145 regs_type = 0; 146 regs_id = 0; 147 148 /* Retrieve the per-device 'allow_memio' hint */ 149 if (resource_int_value(device_get_name(ahc->dev_softc), 150 device_get_unit(ahc->dev_softc), 151 "allow_memio", &allow_memio) != 0) { 152 if (bootverbose) 153 device_printf(ahc->dev_softc, "Defaulting to MEMIO "); 154 #ifdef AHC_ALLOW_MEMIO 155 if (bootverbose) 156 printf("on\n"); 157 allow_memio = 1; 158 #else 159 if (bootverbose) 160 printf("off\n"); 161 allow_memio = 0; 162 #endif 163 } 164 165 if (allow_memio != 0) { 166 regs_type = SYS_RES_MEMORY; 167 regs_id = AHC_PCI_MEMADDR; 168 regs = bus_alloc_resource_any(ahc->dev_softc, regs_type, 169 ®s_id, RF_ACTIVE); 170 if (regs != NULL) { 171 ahc->tag = rman_get_bustag(regs); 172 ahc->bsh = rman_get_bushandle(regs); 173 174 /* 175 * Do a quick test to see if memory mapped 176 * I/O is functioning correctly. 177 */ 178 if (ahc_pci_test_register_access(ahc) != 0) { 179 device_printf(ahc->dev_softc, 180 "PCI Device %d:%d:%d failed memory " 181 "mapped test. Using PIO.\n", 182 aic_get_pci_bus(ahc->dev_softc), 183 aic_get_pci_slot(ahc->dev_softc), 184 aic_get_pci_function(ahc->dev_softc)); 185 bus_release_resource(ahc->dev_softc, regs_type, 186 regs_id, regs); 187 regs = NULL; 188 } 189 } 190 } 191 192 if (regs == NULL) { 193 regs_type = SYS_RES_IOPORT; 194 regs_id = AHC_PCI_IOADDR; 195 regs = bus_alloc_resource_any(ahc->dev_softc, regs_type, 196 ®s_id, RF_ACTIVE); 197 if (regs != NULL) { 198 ahc->tag = rman_get_bustag(regs); 199 ahc->bsh = rman_get_bushandle(regs); 200 if (ahc_pci_test_register_access(ahc) != 0) { 201 device_printf(ahc->dev_softc, 202 "PCI Device %d:%d:%d failed I/O " 203 "mapped test.\n", 204 aic_get_pci_bus(ahc->dev_softc), 205 aic_get_pci_slot(ahc->dev_softc), 206 aic_get_pci_function(ahc->dev_softc)); 207 bus_release_resource(ahc->dev_softc, regs_type, 208 regs_id, regs); 209 regs = NULL; 210 } 211 } 212 } 213 if (regs == NULL) { 214 device_printf(ahc->dev_softc, 215 "can't allocate register resources\n"); 216 return (ENOMEM); 217 } 218 ahc->platform_data->regs_res_type = regs_type; 219 ahc->platform_data->regs_res_id = regs_id; 220 ahc->platform_data->regs = regs; 221 return (0); 222 } 223