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: ahc_pci.c,v 1.53 2003/05/03 23:27:57 gibbs Exp $ 32 */ 33 34 #include <sys/cdefs.h> 35 __FBSDID("$FreeBSD$"); 36 37 #include <dev/aic7xxx/aic7xxx_osm.h> 38 39 #define AHC_PCI_IOADDR PCIR_BAR(0) /* I/O Address */ 40 #define AHC_PCI_MEMADDR PCIR_BAR(1) /* Mem I/O Address */ 41 42 static int ahc_pci_probe(device_t dev); 43 static int ahc_pci_attach(device_t dev); 44 45 static device_method_t ahc_pci_device_methods[] = { 46 /* Device interface */ 47 DEVMETHOD(device_probe, ahc_pci_probe), 48 DEVMETHOD(device_attach, ahc_pci_attach), 49 DEVMETHOD(device_detach, ahc_detach), 50 { 0, 0 } 51 }; 52 53 static driver_t ahc_pci_driver = { 54 "ahc", 55 ahc_pci_device_methods, 56 sizeof(struct ahc_softc) 57 }; 58 59 DRIVER_MODULE(ahc_pci, pci, ahc_pci_driver, ahc_devclass, 0, 0); 60 DRIVER_MODULE(ahc_pci, cardbus, ahc_pci_driver, ahc_devclass, 0, 0); 61 MODULE_DEPEND(ahc_pci, ahc, 1, 1, 1); 62 MODULE_VERSION(ahc_pci, 1); 63 64 static int 65 ahc_pci_probe(device_t dev) 66 { 67 struct ahc_pci_identity *entry; 68 69 entry = ahc_find_pci_device(dev); 70 if (entry != NULL) { 71 device_set_desc(dev, entry->name); 72 return (0); 73 } 74 return (ENXIO); 75 } 76 77 static int 78 ahc_pci_attach(device_t dev) 79 { 80 struct ahc_pci_identity *entry; 81 struct ahc_softc *ahc; 82 char *name; 83 int error; 84 85 entry = ahc_find_pci_device(dev); 86 if (entry == NULL) 87 return (ENXIO); 88 89 /* 90 * Allocate a softc for this card and 91 * set it up for attachment by our 92 * common detect routine. 93 */ 94 name = malloc(strlen(device_get_nameunit(dev)) + 1, M_DEVBUF, M_NOWAIT); 95 if (name == NULL) 96 return (ENOMEM); 97 strcpy(name, device_get_nameunit(dev)); 98 ahc = ahc_alloc(dev, name); 99 if (ahc == NULL) 100 return (ENOMEM); 101 102 ahc_set_unit(ahc, device_get_unit(dev)); 103 104 /* 105 * Should we bother disabling 39Bit addressing 106 * based on installed memory? 107 */ 108 if (sizeof(bus_addr_t) > 4) 109 ahc->flags |= AHC_39BIT_ADDRESSING; 110 111 /* Allocate a dmatag for our SCB DMA maps */ 112 /* XXX Should be a child of the PCI bus dma tag */ 113 error = bus_dma_tag_create(/*parent*/NULL, /*alignment*/1, 114 /*boundary*/0, 115 (ahc->flags & AHC_39BIT_ADDRESSING) 116 ? 0x7FFFFFFFFF 117 : BUS_SPACE_MAXADDR_32BIT, 118 /*highaddr*/BUS_SPACE_MAXADDR, 119 /*filter*/NULL, /*filterarg*/NULL, 120 /*maxsize*/BUS_SPACE_MAXSIZE_32BIT, 121 /*nsegments*/AHC_NSEG, 122 /*maxsegsz*/AHC_MAXTRANSFER_SIZE, 123 /*flags*/0, 124 /*lockfunc*/busdma_lock_mutex, 125 /*lockarg*/&Giant, 126 &ahc->parent_dmat); 127 128 if (error != 0) { 129 printf("ahc_pci_attach: Could not allocate DMA tag " 130 "- error %d\n", error); 131 ahc_free(ahc); 132 return (ENOMEM); 133 } 134 ahc->dev_softc = dev; 135 error = ahc_pci_config(ahc, entry); 136 if (error != 0) { 137 ahc_free(ahc); 138 return (error); 139 } 140 141 ahc_attach(ahc); 142 return (0); 143 } 144 145 int 146 ahc_pci_map_registers(struct ahc_softc *ahc) 147 { 148 struct resource *regs; 149 u_int command; 150 int regs_type; 151 int regs_id; 152 int allow_memio; 153 154 command = ahc_pci_read_config(ahc->dev_softc, PCIR_COMMAND, /*bytes*/1); 155 regs = NULL; 156 regs_type = 0; 157 regs_id = 0; 158 159 /* Retrieve the per-device 'allow_memio' hint */ 160 if (resource_int_value(device_get_name(ahc->dev_softc), 161 device_get_unit(ahc->dev_softc), 162 "allow_memio", &allow_memio) != 0) { 163 if (bootverbose) 164 device_printf(ahc->dev_softc, "Defaulting to MEMIO "); 165 #ifdef AHC_ALLOW_MEMIO 166 if (bootverbose) 167 printf("on\n"); 168 allow_memio = 1; 169 #else 170 if (bootverbose) 171 printf("off\n"); 172 allow_memio = 0; 173 #endif 174 } 175 176 if ((allow_memio != 0) && (command & PCIM_CMD_MEMEN) != 0) { 177 178 regs_type = SYS_RES_MEMORY; 179 regs_id = AHC_PCI_MEMADDR; 180 regs = bus_alloc_resource(ahc->dev_softc, regs_type, 181 ®s_id, 0, ~0, 1, RF_ACTIVE); 182 if (regs != NULL) { 183 ahc->tag = rman_get_bustag(regs); 184 ahc->bsh = rman_get_bushandle(regs); 185 186 /* 187 * Do a quick test to see if memory mapped 188 * I/O is functioning correctly. 189 */ 190 if (ahc_pci_test_register_access(ahc) != 0) { 191 device_printf(ahc->dev_softc, 192 "PCI Device %d:%d:%d failed memory " 193 "mapped test. Using PIO.\n", 194 ahc_get_pci_bus(ahc->dev_softc), 195 ahc_get_pci_slot(ahc->dev_softc), 196 ahc_get_pci_function(ahc->dev_softc)); 197 bus_release_resource(ahc->dev_softc, regs_type, 198 regs_id, regs); 199 regs = NULL; 200 } else { 201 command &= ~PCIM_CMD_PORTEN; 202 ahc_pci_write_config(ahc->dev_softc, 203 PCIR_COMMAND, 204 command, /*bytes*/1); 205 } 206 } 207 } 208 209 if (regs == NULL && (command & PCIM_CMD_PORTEN) != 0) { 210 regs_type = SYS_RES_IOPORT; 211 regs_id = AHC_PCI_IOADDR; 212 regs = bus_alloc_resource(ahc->dev_softc, regs_type, 213 ®s_id, 0, ~0, 1, RF_ACTIVE); 214 if (regs != NULL) { 215 ahc->tag = rman_get_bustag(regs); 216 ahc->bsh = rman_get_bushandle(regs); 217 command &= ~PCIM_CMD_MEMEN; 218 ahc_pci_write_config(ahc->dev_softc, PCIR_COMMAND, 219 command, /*bytes*/1); 220 } 221 } 222 if (regs == NULL) { 223 device_printf(ahc->dev_softc, 224 "can't allocate register resources\n"); 225 return (ENOMEM); 226 } 227 ahc->platform_data->regs_res_type = regs_type; 228 ahc->platform_data->regs_res_id = regs_id; 229 ahc->platform_data->regs = regs; 230 return (0); 231 } 232 233 int 234 ahc_pci_map_int(struct ahc_softc *ahc) 235 { 236 int zero; 237 238 zero = 0; 239 ahc->platform_data->irq = 240 bus_alloc_resource(ahc->dev_softc, SYS_RES_IRQ, &zero, 241 0, ~0, 1, RF_ACTIVE | RF_SHAREABLE); 242 if (ahc->platform_data->irq == NULL) { 243 device_printf(ahc->dev_softc, 244 "bus_alloc_resource() failed to allocate IRQ\n"); 245 return (ENOMEM); 246 } 247 ahc->platform_data->irq_res_type = SYS_RES_IRQ; 248 return (ahc_map_int(ahc)); 249 } 250 251 void 252 ahc_power_state_change(struct ahc_softc *ahc, ahc_power_state new_state) 253 { 254 uint32_t cap; 255 u_int cap_offset; 256 257 /* 258 * Traverse the capability list looking for 259 * the power management capability. 260 */ 261 cap = 0; 262 cap_offset = ahc_pci_read_config(ahc->dev_softc, 263 PCIR_CAP_PTR, /*bytes*/1); 264 while (cap_offset != 0) { 265 266 cap = ahc_pci_read_config(ahc->dev_softc, 267 cap_offset, /*bytes*/4); 268 if ((cap & 0xFF) == 1 269 && ((cap >> 16) & 0x3) > 0) { 270 uint32_t pm_control; 271 272 pm_control = ahc_pci_read_config(ahc->dev_softc, 273 cap_offset + 4, 274 /*bytes*/2); 275 pm_control &= ~0x3; 276 pm_control |= new_state; 277 ahc_pci_write_config(ahc->dev_softc, 278 cap_offset + 4, 279 pm_control, /*bytes*/2); 280 break; 281 } 282 cap_offset = (cap >> 8) & 0xFF; 283 } 284 } 285