1 /*- 2 * Copyright (c) 2003-2008 M. Warner Losh. All Rights Reserved. 3 * Copyright (c) 2000,2001 Jonathan Chen. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27 #include <sys/cdefs.h> 28 __FBSDID("$FreeBSD$"); 29 30 #include <sys/param.h> 31 #include <sys/systm.h> 32 #include <sys/malloc.h> 33 #include <sys/module.h> 34 #include <sys/kernel.h> 35 #include <sys/sysctl.h> 36 37 #include <sys/bus.h> 38 #include <machine/bus.h> 39 #include <sys/rman.h> 40 #include <machine/resource.h> 41 42 #include <sys/pciio.h> 43 #include <dev/pci/pcivar.h> 44 #include <dev/pci/pcireg.h> 45 #include <dev/pci/pci_private.h> 46 47 #include <dev/cardbus/cardbusreg.h> 48 #include <dev/cardbus/cardbusvar.h> 49 #include <dev/cardbus/cardbus_cis.h> 50 #include <dev/pccard/pccard_cis.h> 51 #include <dev/pccard/pccardvar.h> 52 53 #include "power_if.h" 54 #include "pcib_if.h" 55 56 /* sysctl vars */ 57 static SYSCTL_NODE(_hw, OID_AUTO, cardbus, CTLFLAG_RD, 0, "CardBus parameters"); 58 59 int cardbus_debug = 0; 60 SYSCTL_INT(_hw_cardbus, OID_AUTO, debug, CTLFLAG_RWTUN, 61 &cardbus_debug, 0, "CardBus debug"); 62 63 int cardbus_cis_debug = 0; 64 SYSCTL_INT(_hw_cardbus, OID_AUTO, cis_debug, CTLFLAG_RWTUN, 65 &cardbus_cis_debug, 0, "CardBus CIS debug"); 66 67 #define DPRINTF(a) if (cardbus_debug) printf a 68 #define DEVPRINTF(x) if (cardbus_debug) device_printf x 69 70 static int cardbus_attach(device_t cbdev); 71 static int cardbus_attach_card(device_t cbdev); 72 static int cardbus_detach(device_t cbdev); 73 static int cardbus_detach_card(device_t cbdev); 74 static void cardbus_device_setup_regs(pcicfgregs *cfg); 75 static void cardbus_driver_added(device_t cbdev, driver_t *driver); 76 static int cardbus_probe(device_t cbdev); 77 static int cardbus_read_ivar(device_t cbdev, device_t child, int which, 78 uintptr_t *result); 79 80 /************************************************************************/ 81 /* Probe/Attach */ 82 /************************************************************************/ 83 84 static int 85 cardbus_probe(device_t cbdev) 86 { 87 device_set_desc(cbdev, "CardBus bus"); 88 return (0); 89 } 90 91 static int 92 cardbus_attach(device_t cbdev) 93 { 94 struct cardbus_softc *sc; 95 #ifdef PCI_RES_BUS 96 int rid; 97 #endif 98 99 sc = device_get_softc(cbdev); 100 sc->sc_dev = cbdev; 101 #ifdef PCI_RES_BUS 102 rid = 0; 103 sc->sc_bus = bus_alloc_resource(cbdev, PCI_RES_BUS, &rid, 104 pcib_get_bus(cbdev), pcib_get_bus(cbdev), 1, 0); 105 if (sc->sc_bus == NULL) { 106 device_printf(cbdev, "failed to allocate bus number\n"); 107 return (ENXIO); 108 } 109 #else 110 device_printf(cbdev, "Your bus numbers may be AFU\n"); 111 #endif 112 return (0); 113 } 114 115 static int 116 cardbus_detach(device_t cbdev) 117 { 118 #ifdef PCI_RES_BUS 119 struct cardbus_softc *sc; 120 #endif 121 122 cardbus_detach_card(cbdev); 123 #ifdef PCI_RES_BUS 124 sc = device_get_softc(cbdev); 125 device_printf(cbdev, "Freeing up the allocatd bus\n"); 126 (void)bus_release_resource(cbdev, PCI_RES_BUS, 0, sc->sc_bus); 127 #endif 128 return (0); 129 } 130 131 static int 132 cardbus_suspend(device_t self) 133 { 134 135 cardbus_detach_card(self); 136 return (0); 137 } 138 139 static int 140 cardbus_resume(device_t self) 141 { 142 143 return (0); 144 } 145 146 /************************************************************************/ 147 /* Attach/Detach card */ 148 /************************************************************************/ 149 150 static void 151 cardbus_device_setup_regs(pcicfgregs *cfg) 152 { 153 device_t dev = cfg->dev; 154 int i; 155 156 /* 157 * Some cards power up with garbage in their BARs. This 158 * code clears all that junk out. 159 */ 160 for (i = 0; i < PCIR_MAX_BAR_0; i++) 161 pci_write_config(dev, PCIR_BAR(i), 0, 4); 162 163 cfg->intline = 164 pci_get_irq(device_get_parent(device_get_parent(dev))); 165 pci_write_config(dev, PCIR_INTLINE, cfg->intline, 1); 166 pci_write_config(dev, PCIR_CACHELNSZ, 0x08, 1); 167 pci_write_config(dev, PCIR_LATTIMER, 0xa8, 1); 168 pci_write_config(dev, PCIR_MINGNT, 0x14, 1); 169 pci_write_config(dev, PCIR_MAXLAT, 0x14, 1); 170 } 171 172 static struct pci_devinfo * 173 cardbus_alloc_devinfo(device_t dev) 174 { 175 struct cardbus_devinfo *dinfo; 176 177 dinfo = malloc(sizeof(*dinfo), M_DEVBUF, M_WAITOK | M_ZERO); 178 return (&dinfo->pci); 179 } 180 181 static int 182 cardbus_attach_card(device_t cbdev) 183 { 184 device_t brdev = device_get_parent(cbdev); 185 device_t child; 186 int bus, domain, slot, func; 187 int cardattached = 0; 188 int cardbusfunchigh = 0; 189 struct cardbus_softc *sc; 190 191 sc = device_get_softc(cbdev); 192 cardbus_detach_card(cbdev); /* detach existing cards */ 193 POWER_DISABLE_SOCKET(brdev, cbdev); /* Turn the socket off first */ 194 POWER_ENABLE_SOCKET(brdev, cbdev); 195 domain = pcib_get_domain(cbdev); 196 bus = pcib_get_bus(cbdev); 197 slot = 0; 198 /* For each function, set it up and try to attach a driver to it */ 199 for (func = 0; func <= cardbusfunchigh; func++) { 200 struct cardbus_devinfo *dinfo; 201 202 dinfo = (struct cardbus_devinfo *) 203 pci_read_device(brdev, cbdev, domain, bus, slot, func); 204 if (dinfo == NULL) 205 continue; 206 if (dinfo->pci.cfg.mfdev) 207 cardbusfunchigh = PCI_FUNCMAX; 208 209 child = device_add_child(cbdev, NULL, -1); 210 if (child == NULL) { 211 DEVPRINTF((cbdev, "Cannot add child!\n")); 212 pci_freecfg((struct pci_devinfo *)dinfo); 213 continue; 214 } 215 dinfo->pci.cfg.dev = child; 216 resource_list_init(&dinfo->pci.resources); 217 device_set_ivars(child, dinfo); 218 cardbus_device_create(sc, dinfo, cbdev, child); 219 if (cardbus_do_cis(cbdev, child) != 0) 220 DEVPRINTF((cbdev, "Warning: Bogus CIS ignored\n")); 221 pci_cfg_save(dinfo->pci.cfg.dev, &dinfo->pci, 0); 222 pci_cfg_restore(dinfo->pci.cfg.dev, &dinfo->pci); 223 cardbus_device_setup_regs(&dinfo->pci.cfg); 224 pci_add_resources(cbdev, child, 1, dinfo->mprefetchable); 225 pci_print_verbose(&dinfo->pci); 226 if (device_probe_and_attach(child) == 0) 227 cardattached++; 228 else 229 pci_cfg_save(dinfo->pci.cfg.dev, &dinfo->pci, 1); 230 } 231 if (cardattached > 0) 232 return (0); 233 /* POWER_DISABLE_SOCKET(brdev, cbdev); */ 234 return (ENOENT); 235 } 236 237 static void 238 cardbus_child_deleted(device_t cbdev, device_t child) 239 { 240 struct cardbus_devinfo *dinfo = device_get_ivars(child); 241 242 if (dinfo->pci.cfg.dev != child) 243 device_printf(cbdev, "devinfo dev mismatch\n"); 244 cardbus_device_destroy(dinfo); 245 pci_child_deleted(cbdev, child); 246 } 247 248 static int 249 cardbus_detach_card(device_t cbdev) 250 { 251 int err = 0; 252 253 err = bus_generic_detach(cbdev); 254 if (err) 255 return (err); 256 err = device_delete_children(cbdev); 257 if (err) 258 return (err); 259 260 POWER_DISABLE_SOCKET(device_get_parent(cbdev), cbdev); 261 return (err); 262 } 263 264 static void 265 cardbus_driver_added(device_t cbdev, driver_t *driver) 266 { 267 int numdevs; 268 device_t *devlist; 269 device_t dev; 270 int i; 271 struct cardbus_devinfo *dinfo; 272 273 DEVICE_IDENTIFY(driver, cbdev); 274 if (device_get_children(cbdev, &devlist, &numdevs) != 0) 275 return; 276 277 /* 278 * If there are no drivers attached, but there are children, 279 * then power the card up. 280 */ 281 for (i = 0; i < numdevs; i++) { 282 dev = devlist[i]; 283 if (device_get_state(dev) != DS_NOTPRESENT) 284 break; 285 } 286 if (i > 0 && i == numdevs) 287 POWER_ENABLE_SOCKET(device_get_parent(cbdev), cbdev); 288 for (i = 0; i < numdevs; i++) { 289 dev = devlist[i]; 290 if (device_get_state(dev) != DS_NOTPRESENT) 291 continue; 292 dinfo = device_get_ivars(dev); 293 pci_print_verbose(&dinfo->pci); 294 if (bootverbose) 295 printf("pci%d:%d:%d:%d: reprobing on driver added\n", 296 dinfo->pci.cfg.domain, dinfo->pci.cfg.bus, 297 dinfo->pci.cfg.slot, dinfo->pci.cfg.func); 298 pci_cfg_restore(dinfo->pci.cfg.dev, &dinfo->pci); 299 if (device_probe_and_attach(dev) != 0) 300 pci_cfg_save(dev, &dinfo->pci, 1); 301 } 302 free(devlist, M_TEMP); 303 } 304 305 /************************************************************************/ 306 /* Other Bus Methods */ 307 /************************************************************************/ 308 309 static int 310 cardbus_read_ivar(device_t cbdev, device_t child, int which, uintptr_t *result) 311 { 312 struct cardbus_devinfo *dinfo; 313 pcicfgregs *cfg; 314 315 dinfo = device_get_ivars(child); 316 cfg = &dinfo->pci.cfg; 317 318 switch (which) { 319 case PCI_IVAR_ETHADDR: 320 /* 321 * The generic accessor doesn't deal with failure, so 322 * we set the return value, then return an error. 323 */ 324 if (dinfo->fepresent & (1 << PCCARD_TPLFE_TYPE_LAN_NID)) { 325 *((uint8_t **) result) = dinfo->funce.lan.nid; 326 break; 327 } 328 *((uint8_t **) result) = NULL; 329 return (EINVAL); 330 default: 331 return (pci_read_ivar(cbdev, child, which, result)); 332 } 333 return 0; 334 } 335 336 static device_method_t cardbus_methods[] = { 337 /* Device interface */ 338 DEVMETHOD(device_probe, cardbus_probe), 339 DEVMETHOD(device_attach, cardbus_attach), 340 DEVMETHOD(device_detach, cardbus_detach), 341 DEVMETHOD(device_suspend, cardbus_suspend), 342 DEVMETHOD(device_resume, cardbus_resume), 343 344 /* Bus interface */ 345 DEVMETHOD(bus_child_deleted, cardbus_child_deleted), 346 DEVMETHOD(bus_get_dma_tag, bus_generic_get_dma_tag), 347 DEVMETHOD(bus_read_ivar, cardbus_read_ivar), 348 DEVMETHOD(bus_driver_added, cardbus_driver_added), 349 DEVMETHOD(bus_rescan, bus_null_rescan), 350 351 /* Card Interface */ 352 DEVMETHOD(card_attach_card, cardbus_attach_card), 353 DEVMETHOD(card_detach_card, cardbus_detach_card), 354 355 /* PCI interface */ 356 DEVMETHOD(pci_alloc_devinfo, cardbus_alloc_devinfo), 357 358 {0,0} 359 }; 360 361 DEFINE_CLASS_1(cardbus, cardbus_driver, cardbus_methods, 362 sizeof(struct cardbus_softc), pci_driver); 363 364 static devclass_t cardbus_devclass; 365 366 DRIVER_MODULE(cardbus, cbb, cardbus_driver, cardbus_devclass, 0, 0); 367 MODULE_VERSION(cardbus, 1); 368