sys/dev/cardbus/cardbus.c

   1 /*-
   2  * Copyright (c) 2003 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 SYSCTL_NODE(_hw, OID_AUTO, cardbus, CTLFLAG_RD, 0, "CardBus parameters");
  58
  59 int    cardbus_debug = 0;
  60 TUNABLE_INT("hw.cardbus.debug", &cardbus_debug);
  61 SYSCTL_INT(_hw_cardbus, OID_AUTO, debug, CTLFLAG_RW,
  62     &cardbus_debug, 0,
  63   "CardBus debug");
  64
  65 int    cardbus_cis_debug = 0;
  66 TUNABLE_INT("hw.cardbus.cis_debug", &cardbus_cis_debug);
  67 SYSCTL_INT(_hw_cardbus, OID_AUTO, cis_debug, CTLFLAG_RW,
  68     &cardbus_cis_debug, 0,
  69   "CardBus CIS debug");
  70
  71 #define DPRINTF(a) if (cardbus_debug) printf a
  72 #define DEVPRINTF(x) if (cardbus_debug) device_printf x
  73
  74 static int      cardbus_attach(device_t cbdev);
  75 static int      cardbus_attach_card(device_t cbdev);
  76 static int      cardbus_detach(device_t cbdev);
  77 static int      cardbus_detach_card(device_t cbdev);
  78 static void     cardbus_device_setup_regs(pcicfgregs *cfg);
  79 static void     cardbus_driver_added(device_t cbdev, driver_t *driver);
  80 static int      cardbus_probe(device_t cbdev);
  81 static int      cardbus_read_ivar(device_t cbdev, device_t child, int which,
  82                     uintptr_t *result);
  83 static void     cardbus_release_all_resources(device_t cbdev,
  84                     struct cardbus_devinfo *dinfo);
  85 static int      cardbus_write_ivar(device_t cbdev, device_t child, int which,
  86                     uintptr_t value);
  87
  88 /************************************************************************/
  89 /* Probe/Attach                                                         */
  90 /************************************************************************/
  91
  92 static int
  93 cardbus_probe(device_t cbdev)
  94 {
  95         device_set_desc(cbdev, "CardBus bus");
  96         return (0);
  97 }
  98
  99 static int
 100 cardbus_attach(device_t cbdev)
 101 {
 102         struct cardbus_softc *sc = device_get_softc(cbdev);
 103
 104         sc->sc_dev = cbdev;
 105         cardbus_device_create(sc);
 106         return (0);
 107 }
 108
 109 static int
 110 cardbus_detach(device_t cbdev)
 111 {
 112         struct cardbus_softc *sc = device_get_softc(cbdev);
 113
 114         cardbus_detach_card(cbdev);
 115         cardbus_device_destroy(sc);
 116         return (0);
 117 }
 118
 119 static int
 120 cardbus_suspend(device_t self)
 121 {
 122
 123         cardbus_detach_card(self);
 124         return (0);
 125 }
 126
 127 static int
 128 cardbus_resume(device_t self)
 129 {
 130
 131         return (0);
 132 }
 133
 134 /************************************************************************/
 135 /* Attach/Detach card                                                   */
 136 /************************************************************************/
 137
 138 static void
 139 cardbus_device_setup_regs(pcicfgregs *cfg)
 140 {
 141         device_t dev = cfg->dev;
 142         int i;
 143
 144         /*
 145          * Some cards power up with garbage in their BARs.  This
 146          * code clears all that junk out.
 147          */
 148         for (i = 0; i < PCI_MAX_BAR_0; i++)
 149                 pci_write_config(dev, PCIR_BAR(i), 0, 4);
 150
 151         cfg->intline =
 152             pci_get_irq(device_get_parent(device_get_parent(dev)));
 153         pci_write_config(dev, PCIR_INTLINE, cfg->intline, 1);
 154         pci_write_config(dev, PCIR_CACHELNSZ, 0x08, 1);
 155         pci_write_config(dev, PCIR_LATTIMER, 0xa8, 1);
 156         pci_write_config(dev, PCIR_MINGNT, 0x14, 1);
 157         pci_write_config(dev, PCIR_MAXLAT, 0x14, 1);
 158 }
 159
 160 static int
 161 cardbus_attach_card(device_t cbdev)
 162 {
 163         device_t brdev = device_get_parent(cbdev);
 164         device_t child;
 165         int cardattached = 0;
 166         int bus, slot, func;
 167         int cardbusfunchigh = 0;
 168
 169         cardbus_detach_card(cbdev); /* detach existing cards */
 170         POWER_ENABLE_SOCKET(brdev, cbdev);
 171         bus = pcib_get_bus(cbdev);
 172         slot = 0;
 173         /* For each function, set it up and try to attach a driver to it */
 174         for (func = 0; func <= cardbusfunchigh; func++) {
 175                 struct cardbus_devinfo *dinfo;
 176
 177                 dinfo = (struct cardbus_devinfo *)
 178                     pci_read_device(brdev, bus, slot, func,
 179                         sizeof(struct cardbus_devinfo));
 180                 if (dinfo == NULL)
 181                         continue;
 182                 if (dinfo->pci.cfg.mfdev)
 183                         cardbusfunchigh = PCI_FUNCMAX;
 184
 185                 child = device_add_child(cbdev, NULL, -1);
 186                 if (child == NULL) {
 187                         DEVPRINTF((cbdev, "Cannot add child!\n"));
 188                         pci_freecfg((struct pci_devinfo *)dinfo);
 189                         continue;
 190                 }
 191                 dinfo->pci.cfg.dev = child;
 192                 resource_list_init(&dinfo->pci.resources);
 193                 device_set_ivars(child, dinfo);
 194                 if (cardbus_do_cis(cbdev, child) != 0)
 195                         DEVPRINTF((cbdev, "Warning: Bogus CIS ignored\n"));
 196                 pci_cfg_save(dinfo->pci.cfg.dev, &dinfo->pci, 0);
 197                 pci_cfg_restore(dinfo->pci.cfg.dev, &dinfo->pci);
 198                 cardbus_device_setup_regs(&dinfo->pci.cfg);
 199                 pci_add_resources(cbdev, child, 1, dinfo->mprefetchable);
 200                 pci_print_verbose(&dinfo->pci);
 201                 if (device_probe_and_attach(child) == 0)
 202                         cardattached++;
 203                 else
 204                         pci_cfg_save(dinfo->pci.cfg.dev, &dinfo->pci, 1);
 205         }
 206         if (cardattached > 0)
 207                 return (0);
 208         POWER_DISABLE_SOCKET(brdev, cbdev);
 209         return (ENOENT);
 210 }
 211
 212 static int
 213 cardbus_detach_card(device_t cbdev)
 214 {
 215         int numdevs;
 216         device_t *devlist;
 217         int tmp;
 218         int err = 0;
 219
 220         if (device_get_children(cbdev, &devlist, &numdevs) != 0)
 221                 return (ENOENT);
 222
 223         if (numdevs == 0) {
 224                 free(devlist, M_TEMP);
 225                 return (ENOENT);
 226         }
 227
 228         for (tmp = 0; tmp < numdevs; tmp++) {
 229                 struct cardbus_devinfo *dinfo = device_get_ivars(devlist[tmp]);
 230                 int status = device_get_state(devlist[tmp]);
 231
 232                 if (dinfo->pci.cfg.dev != devlist[tmp])
 233                         device_printf(cbdev, "devinfo dev mismatch\n");
 234                 if (status == DS_ATTACHED || status == DS_BUSY)
 235                         device_detach(devlist[tmp]);
 236                 cardbus_release_all_resources(cbdev, dinfo);
 237                 device_delete_child(cbdev, devlist[tmp]);
 238                 pci_freecfg((struct pci_devinfo *)dinfo);
 239         }
 240         POWER_DISABLE_SOCKET(device_get_parent(cbdev), cbdev);
 241         free(devlist, M_TEMP);
 242         return (err);
 243 }
 244
 245 static void
 246 cardbus_driver_added(device_t cbdev, driver_t *driver)
 247 {
 248         int numdevs;
 249         device_t *devlist;
 250         device_t dev;
 251         int i;
 252         struct cardbus_devinfo *dinfo;
 253
 254         DEVICE_IDENTIFY(driver, cbdev);
 255         if (device_get_children(cbdev, &devlist, &numdevs) != 0)
 256                 return;
 257
 258         /*
 259          * If there are no drivers attached, but there are children,
 260          * then power the card up.
 261          */
 262         for (i = 0; i < numdevs; i++) {
 263                 dev = devlist[i];
 264                 if (device_get_state(dev) != DS_NOTPRESENT)
 265                     break;
 266         }
 267         if (i > 0 && i == numdevs)
 268                 POWER_ENABLE_SOCKET(device_get_parent(cbdev), cbdev);
 269         for (i = 0; i < numdevs; i++) {
 270                 dev = devlist[i];
 271                 if (device_get_state(dev) != DS_NOTPRESENT)
 272                         continue;
 273                 dinfo = device_get_ivars(dev);
 274                 pci_print_verbose(&dinfo->pci);
 275                 pci_cfg_restore(dinfo->pci.cfg.dev, &dinfo->pci);
 276                 if (device_probe_and_attach(dev) != 0)
 277                         pci_cfg_save(dev, &dinfo->pci, 1);
 278         }
 279         free(devlist, M_TEMP);
 280 }
 281
 282 static void
 283 cardbus_release_all_resources(device_t cbdev, struct cardbus_devinfo *dinfo)
 284 {
 285         struct resource_list_entry *rle;
 286
 287         /* Free all allocated resources */
 288         STAILQ_FOREACH(rle, &dinfo->pci.resources, link) {
 289                 if (rle->res) {
 290                         BUS_RELEASE_RESOURCE(device_get_parent(cbdev),
 291                             cbdev, rle->type, rle->rid, rle->res);
 292                         rle->res = NULL;
 293                         /*
 294                          * zero out config so the card won't acknowledge
 295                          * access to the space anymore. XXX doesn't handle
 296                          * 64-bit bars.
 297                          */
 298                         pci_write_config(dinfo->pci.cfg.dev, rle->rid, 0, 4);
 299                 }
 300         }
 301         resource_list_free(&dinfo->pci.resources);
 302 }
 303
 304 /************************************************************************/
 305 /* Other Bus Methods                                                    */
 306 /************************************************************************/
 307
 308 static int
 309 cardbus_read_ivar(device_t cbdev, device_t child, int which, uintptr_t *result)
 310 {
 311         struct cardbus_devinfo *dinfo;
 312         pcicfgregs *cfg;
 313
 314         dinfo = device_get_ivars(child);
 315         cfg = &dinfo->pci.cfg;
 316
 317         switch (which) {
 318         case PCI_IVAR_ETHADDR:
 319                 /*
 320                  * The generic accessor doesn't deal with failure, so
 321                  * we set the return value, then return an error.
 322                  */
 323                 if (dinfo->fepresent & (1 << PCCARD_TPLFE_TYPE_LAN_NID)) {
 324                         *((uint8_t **) result) = dinfo->funce.lan.nid;
 325                         break;
 326                 }
 327                 *((uint8_t **) result) = NULL;
 328                 return (EINVAL);
 329         default:
 330                 return (pci_read_ivar(cbdev, child, which, result));
 331         }
 332         return 0;
 333 }
 334
 335 static int
 336 cardbus_write_ivar(device_t cbdev, device_t child, int which, uintptr_t value)
 337 {
 338         return(pci_write_ivar(cbdev, child, which, value));
 339 }
 340
 341 static device_method_t cardbus_methods[] = {
 342         /* Device interface */
 343         DEVMETHOD(device_probe,         cardbus_probe),
 344         DEVMETHOD(device_attach,        cardbus_attach),
 345         DEVMETHOD(device_detach,        cardbus_detach),
 346         DEVMETHOD(device_suspend,       cardbus_suspend),
 347         DEVMETHOD(device_resume,        cardbus_resume),
 348
 349         /* Bus interface */
 350         DEVMETHOD(bus_read_ivar,        cardbus_read_ivar),
 351         DEVMETHOD(bus_write_ivar,       cardbus_write_ivar),
 352         DEVMETHOD(bus_driver_added,     cardbus_driver_added),
 353
 354         /* Card Interface */
 355         DEVMETHOD(card_attach_card,     cardbus_attach_card),
 356         DEVMETHOD(card_detach_card,     cardbus_detach_card),
 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);