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 __FBSDID("$FreeBSD$"); 36 37 #include <dev/aic7xxx/aic7xxx_osm.h> 38 39 static int ahc_pci_probe(device_t dev); 40 static int ahc_pci_attach(device_t dev); 41 42 static device_method_t ahc_pci_device_methods[] = { 43 /* Device interface */ 44 DEVMETHOD(device_probe, ahc_pci_probe), 45 DEVMETHOD(device_attach, ahc_pci_attach), 46 DEVMETHOD(device_detach, ahc_detach), 47 { 0, 0 } 48 }; 49 50 static driver_t ahc_pci_driver = { 51 "ahc", 52 ahc_pci_device_methods, 53 sizeof(struct ahc_softc) 54 }; 55 56 DRIVER_MODULE(ahc_pci, pci, ahc_pci_driver, ahc_devclass, 0, 0); 57 MODULE_DEPEND(ahc_pci, ahc, 1, 1, 1); 58 MODULE_VERSION(ahc_pci, 1); 59 60 static int 61 ahc_pci_probe(device_t dev) 62 { 63 struct ahc_pci_identity *entry; 64 65 entry = ahc_find_pci_device(dev); 66 if (entry != NULL) { 67 device_set_desc(dev, entry->name); 68 return (BUS_PROBE_DEFAULT); 69 } 70 return (ENXIO); 71 } 72 73 static int 74 ahc_pci_attach(device_t dev) 75 { 76 struct ahc_pci_identity *entry; 77 struct ahc_softc *ahc; 78 char *name; 79 int error; 80 81 entry = ahc_find_pci_device(dev); 82 if (entry == NULL) 83 return (ENXIO); 84 85 /* 86 * Allocate a softc for this card and 87 * set it up for attachment by our 88 * common detect routine. 89 */ 90 name = malloc(strlen(device_get_nameunit(dev)) + 1, M_DEVBUF, M_NOWAIT); 91 if (name == NULL) 92 return (ENOMEM); 93 strcpy(name, device_get_nameunit(dev)); 94 ahc = ahc_alloc(dev, name); 95 if (ahc == NULL) 96 return (ENOMEM); 97 98 ahc_set_unit(ahc, device_get_unit(dev)); 99 100 /* 101 * Should we bother disabling 39Bit addressing 102 * based on installed memory? 103 */ 104 if (sizeof(bus_addr_t) > 4) 105 ahc->flags |= AHC_39BIT_ADDRESSING; 106 107 /* Allocate a dmatag for our SCB DMA maps */ 108 error = aic_dma_tag_create(ahc, /*parent*/bus_get_dma_tag(dev), 109 /*alignment*/1, /*boundary*/0, 110 (ahc->flags & AHC_39BIT_ADDRESSING) 111 ? 0x7FFFFFFFFFLL 112 : BUS_SPACE_MAXADDR_32BIT, 113 /*highaddr*/BUS_SPACE_MAXADDR, 114 /*filter*/NULL, /*filterarg*/NULL, 115 /*maxsize*/BUS_SPACE_MAXSIZE_32BIT, 116 /*nsegments*/AHC_NSEG, 117 /*maxsegsz*/AHC_MAXTRANSFER_SIZE, 118 /*flags*/0, 119 &ahc->parent_dmat); 120 121 if (error != 0) { 122 printf("ahc_pci_attach: Could not allocate DMA tag " 123 "- error %d\n", error); 124 ahc_free(ahc); 125 return (ENOMEM); 126 } 127 ahc->dev_softc = dev; 128 error = ahc_pci_config(ahc, entry); 129 if (error != 0) { 130 ahc_free(ahc); 131 return (error); 132 } 133 134 ahc_attach(ahc); 135 return (0); 136 } 137 138 int 139 ahc_pci_map_registers(struct ahc_softc *ahc) 140 { 141 struct resource *regs; 142 int regs_type; 143 int regs_id; 144 int allow_memio; 145 146 regs = NULL; 147 regs_type = 0; 148 regs_id = 0; 149 150 /* Retrieve the per-device 'allow_memio' hint */ 151 if (resource_int_value(device_get_name(ahc->dev_softc), 152 device_get_unit(ahc->dev_softc), 153 "allow_memio", &allow_memio) != 0) { 154 if (bootverbose) 155 device_printf(ahc->dev_softc, "Defaulting to MEMIO "); 156 #ifdef AHC_ALLOW_MEMIO 157 if (bootverbose) 158 printf("on\n"); 159 allow_memio = 1; 160 #else 161 if (bootverbose) 162 printf("off\n"); 163 allow_memio = 0; 164 #endif 165 } 166 167 if (allow_memio != 0) { 168 regs_type = SYS_RES_MEMORY; 169 regs_id = AHC_PCI_MEMADDR; 170 regs = bus_alloc_resource_any(ahc->dev_softc, regs_type, 171 ®s_id, RF_ACTIVE); 172 if (regs != NULL) { 173 ahc->tag = rman_get_bustag(regs); 174 ahc->bsh = rman_get_bushandle(regs); 175 176 /* 177 * Do a quick test to see if memory mapped 178 * I/O is functioning correctly. 179 */ 180 if (ahc_pci_test_register_access(ahc) != 0) { 181 device_printf(ahc->dev_softc, 182 "PCI Device %d:%d:%d failed memory " 183 "mapped test. Using PIO.\n", 184 aic_get_pci_bus(ahc->dev_softc), 185 aic_get_pci_slot(ahc->dev_softc), 186 aic_get_pci_function(ahc->dev_softc)); 187 bus_release_resource(ahc->dev_softc, regs_type, 188 regs_id, regs); 189 regs = NULL; 190 } 191 } 192 } 193 194 if (regs == NULL) { 195 regs_type = SYS_RES_IOPORT; 196 regs_id = AHC_PCI_IOADDR; 197 regs = bus_alloc_resource_any(ahc->dev_softc, regs_type, 198 ®s_id, RF_ACTIVE); 199 if (regs != NULL) { 200 ahc->tag = rman_get_bustag(regs); 201 ahc->bsh = rman_get_bushandle(regs); 202 if (ahc_pci_test_register_access(ahc) != 0) { 203 device_printf(ahc->dev_softc, 204 "PCI Device %d:%d:%d failed I/O " 205 "mapped test.\n", 206 aic_get_pci_bus(ahc->dev_softc), 207 aic_get_pci_slot(ahc->dev_softc), 208 aic_get_pci_function(ahc->dev_softc)); 209 bus_release_resource(ahc->dev_softc, regs_type, 210 regs_id, regs); 211 regs = NULL; 212 } 213 } 214 } 215 if (regs == NULL) { 216 device_printf(ahc->dev_softc, 217 "can't allocate register resources\n"); 218 return (ENOMEM); 219 } 220 ahc->platform_data->regs_res_type = regs_type; 221 ahc->platform_data->regs_res_id = regs_id; 222 ahc->platform_data->regs = regs; 223 return (0); 224 } 225