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/ahd_pci.c#17 $ 32 */ 33 34 #include <sys/cdefs.h> 35 __FBSDID("$FreeBSD$"); 36 37 #include <dev/aic7xxx/aic79xx_osm.h> 38 39 static int ahd_pci_probe(device_t dev); 40 static int ahd_pci_attach(device_t dev); 41 42 static device_method_t ahd_pci_device_methods[] = { 43 /* Device interface */ 44 DEVMETHOD(device_probe, ahd_pci_probe), 45 DEVMETHOD(device_attach, ahd_pci_attach), 46 DEVMETHOD(device_detach, ahd_detach), 47 { 0, 0 } 48 }; 49 50 static driver_t ahd_pci_driver = { 51 "ahd", 52 ahd_pci_device_methods, 53 sizeof(struct ahd_softc) 54 }; 55 56 static devclass_t ahd_devclass; 57 58 DRIVER_MODULE(ahd, pci, ahd_pci_driver, ahd_devclass, 0, 0); 59 MODULE_DEPEND(ahd_pci, ahd, 1, 1, 1); 60 MODULE_VERSION(ahd_pci, 1); 61 62 static int 63 ahd_pci_probe(device_t dev) 64 { 65 struct ahd_pci_identity *entry; 66 67 entry = ahd_find_pci_device(dev); 68 if (entry != NULL) { 69 device_set_desc(dev, entry->name); 70 return (BUS_PROBE_DEFAULT); 71 } 72 return (ENXIO); 73 } 74 75 static int 76 ahd_pci_attach(device_t dev) 77 { 78 struct ahd_pci_identity *entry; 79 struct ahd_softc *ahd; 80 char *name; 81 int error; 82 83 entry = ahd_find_pci_device(dev); 84 if (entry == NULL) 85 return (ENXIO); 86 87 /* 88 * Allocate a softc for this card and 89 * set it up for attachment by our 90 * common detect routine. 91 */ 92 name = malloc(strlen(device_get_nameunit(dev)) + 1, M_DEVBUF, M_NOWAIT); 93 if (name == NULL) 94 return (ENOMEM); 95 strcpy(name, device_get_nameunit(dev)); 96 ahd = ahd_alloc(dev, name); 97 if (ahd == NULL) 98 return (ENOMEM); 99 100 ahd_set_unit(ahd, device_get_unit(dev)); 101 102 /* 103 * Should we bother disabling 39Bit addressing 104 * based on installed memory? 105 */ 106 if (sizeof(bus_addr_t) > 4) 107 ahd->flags |= AHD_39BIT_ADDRESSING; 108 109 /* Allocate a dmatag for our SCB DMA maps */ 110 /* XXX Should be a child of the PCI bus dma tag */ 111 error = aic_dma_tag_create(ahd, /*parent*/bus_get_dma_tag(dev), 112 /*alignment*/1, /*boundary*/0, 113 (ahd->flags & AHD_39BIT_ADDRESSING) 114 ? 0x7FFFFFFFFF 115 : BUS_SPACE_MAXADDR_32BIT, 116 /*highaddr*/BUS_SPACE_MAXADDR, 117 /*filter*/NULL, /*filterarg*/NULL, 118 /*maxsize*/BUS_SPACE_MAXSIZE_32BIT, 119 /*nsegments*/AHD_NSEG, 120 /*maxsegsz*/AHD_MAXTRANSFER_SIZE, 121 /*flags*/0, 122 &ahd->parent_dmat); 123 124 if (error != 0) { 125 printf("ahd_pci_attach: Could not allocate DMA tag " 126 "- error %d\n", error); 127 ahd_free(ahd); 128 return (ENOMEM); 129 } 130 ahd->dev_softc = dev; 131 error = ahd_pci_config(ahd, entry); 132 if (error != 0) { 133 ahd_free(ahd); 134 return (error); 135 } 136 137 ahd_attach(ahd); 138 return (0); 139 } 140 141 int 142 ahd_pci_map_registers(struct ahd_softc *ahd) 143 { 144 struct resource *regs; 145 struct resource *regs2; 146 u_int command; 147 int regs_type; 148 int regs_id; 149 int regs_id2; 150 int allow_memio; 151 152 command = aic_pci_read_config(ahd->dev_softc, PCIR_COMMAND, /*bytes*/1); 153 regs = NULL; 154 regs2 = NULL; 155 regs_type = 0; 156 regs_id = 0; 157 158 /* Retrieve the per-device 'allow_memio' hint */ 159 if (resource_int_value(device_get_name(ahd->dev_softc), 160 device_get_unit(ahd->dev_softc), 161 "allow_memio", &allow_memio) != 0) { 162 if (bootverbose) 163 device_printf(ahd->dev_softc, 164 "Defaulting to MEMIO on\n"); 165 allow_memio = 1; 166 } 167 168 if ((command & PCIM_CMD_MEMEN) != 0 169 && (ahd->bugs & AHD_PCIX_MMAPIO_BUG) == 0 170 && allow_memio != 0) { 171 172 regs_type = SYS_RES_MEMORY; 173 regs_id = AHD_PCI_MEMADDR; 174 regs = bus_alloc_resource_any(ahd->dev_softc, regs_type, 175 ®s_id, RF_ACTIVE); 176 if (regs != NULL) { 177 int error; 178 179 ahd->tags[0] = rman_get_bustag(regs); 180 ahd->bshs[0] = rman_get_bushandle(regs); 181 ahd->tags[1] = ahd->tags[0]; 182 error = bus_space_subregion(ahd->tags[0], ahd->bshs[0], 183 /*offset*/0x100, 184 /*size*/0x100, 185 &ahd->bshs[1]); 186 /* 187 * Do a quick test to see if memory mapped 188 * I/O is functioning correctly. 189 */ 190 if (error != 0 191 || ahd_pci_test_register_access(ahd) != 0) { 192 device_printf(ahd->dev_softc, 193 "PCI Device %d:%d:%d failed memory " 194 "mapped test. Using PIO.\n", 195 aic_get_pci_bus(ahd->dev_softc), 196 aic_get_pci_slot(ahd->dev_softc), 197 aic_get_pci_function(ahd->dev_softc)); 198 bus_release_resource(ahd->dev_softc, regs_type, 199 regs_id, regs); 200 regs = NULL; 201 } else { 202 command &= ~PCIM_CMD_PORTEN; 203 aic_pci_write_config(ahd->dev_softc, 204 PCIR_COMMAND, 205 command, /*bytes*/1); 206 } 207 } 208 } 209 if (regs == NULL && (command & PCIM_CMD_PORTEN) != 0) { 210 regs_type = SYS_RES_IOPORT; 211 regs_id = AHD_PCI_IOADDR0; 212 regs = bus_alloc_resource_any(ahd->dev_softc, regs_type, 213 ®s_id, RF_ACTIVE); 214 if (regs == NULL) { 215 device_printf(ahd->dev_softc, 216 "can't allocate register resources\n"); 217 return (ENOMEM); 218 } 219 ahd->tags[0] = rman_get_bustag(regs); 220 ahd->bshs[0] = rman_get_bushandle(regs); 221 222 /* And now the second BAR */ 223 regs_id2 = AHD_PCI_IOADDR1; 224 regs2 = bus_alloc_resource_any(ahd->dev_softc, regs_type, 225 ®s_id2, RF_ACTIVE); 226 if (regs2 == NULL) { 227 device_printf(ahd->dev_softc, 228 "can't allocate register resources\n"); 229 return (ENOMEM); 230 } 231 ahd->tags[1] = rman_get_bustag(regs2); 232 ahd->bshs[1] = rman_get_bushandle(regs2); 233 command &= ~PCIM_CMD_MEMEN; 234 aic_pci_write_config(ahd->dev_softc, PCIR_COMMAND, 235 command, /*bytes*/1); 236 ahd->platform_data->regs_res_type[1] = regs_type; 237 ahd->platform_data->regs_res_id[1] = regs_id2; 238 ahd->platform_data->regs[1] = regs2; 239 } 240 ahd->platform_data->regs_res_type[0] = regs_type; 241 ahd->platform_data->regs_res_id[0] = regs_id; 242 ahd->platform_data->regs[0] = regs; 243 return (0); 244 } 245 246 int 247 ahd_pci_map_int(struct ahd_softc *ahd) 248 { 249 int zero; 250 251 zero = 0; 252 ahd->platform_data->irq = 253 bus_alloc_resource_any(ahd->dev_softc, SYS_RES_IRQ, &zero, 254 RF_ACTIVE | RF_SHAREABLE); 255 if (ahd->platform_data->irq == NULL) 256 return (ENOMEM); 257 ahd->platform_data->irq_res_type = SYS_RES_IRQ; 258 return (ahd_map_int(ahd)); 259 } 260