The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/dev/cardbus/cardbus.c

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    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: releng/8.4/sys/dev/cardbus/cardbus.c 233394 2012-03-23 20:47:49Z jhb $");
   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 
   86 /************************************************************************/
   87 /* Probe/Attach                                                         */
   88 /************************************************************************/
   89 
   90 static int
   91 cardbus_probe(device_t cbdev)
   92 {
   93         device_set_desc(cbdev, "CardBus bus");
   94         return (0);
   95 }
   96 
   97 static int
   98 cardbus_attach(device_t cbdev)
   99 {
  100         struct cardbus_softc *sc;
  101 
  102         sc = device_get_softc(cbdev);
  103         sc->sc_dev = cbdev;
  104         return (0);
  105 }
  106 
  107 static int
  108 cardbus_detach(device_t cbdev)
  109 {
  110 
  111         cardbus_detach_card(cbdev);
  112         return (0);
  113 }
  114 
  115 static int
  116 cardbus_suspend(device_t self)
  117 {
  118 
  119         cardbus_detach_card(self);
  120         return (0);
  121 }
  122 
  123 static int
  124 cardbus_resume(device_t self)
  125 {
  126 
  127         return (0);
  128 }
  129 
  130 /************************************************************************/
  131 /* Attach/Detach card                                                   */
  132 /************************************************************************/
  133 
  134 static void
  135 cardbus_device_setup_regs(pcicfgregs *cfg)
  136 {
  137         device_t dev = cfg->dev;
  138         int i;
  139 
  140         /*
  141          * Some cards power up with garbage in their BARs.  This
  142          * code clears all that junk out.
  143          */
  144         for (i = 0; i < PCIR_MAX_BAR_0; i++)
  145                 pci_write_config(dev, PCIR_BAR(i), 0, 4);
  146 
  147         cfg->intline =
  148             pci_get_irq(device_get_parent(device_get_parent(dev)));
  149         pci_write_config(dev, PCIR_INTLINE, cfg->intline, 1);
  150         pci_write_config(dev, PCIR_CACHELNSZ, 0x08, 1);
  151         pci_write_config(dev, PCIR_LATTIMER, 0xa8, 1);
  152         pci_write_config(dev, PCIR_MINGNT, 0x14, 1);
  153         pci_write_config(dev, PCIR_MAXLAT, 0x14, 1);
  154 }
  155 
  156 static int
  157 cardbus_attach_card(device_t cbdev)
  158 {
  159         device_t brdev = device_get_parent(cbdev);
  160         device_t child;
  161         int bus, domain, slot, func;
  162         int cardattached = 0;
  163         int cardbusfunchigh = 0;
  164         struct cardbus_softc *sc;
  165 
  166         sc = device_get_softc(cbdev);
  167         cardbus_detach_card(cbdev); /* detach existing cards */
  168         POWER_ENABLE_SOCKET(brdev, cbdev);
  169         domain = pcib_get_domain(cbdev);
  170         bus = pcib_get_bus(cbdev);
  171         slot = 0;
  172         /* For each function, set it up and try to attach a driver to it */
  173         for (func = 0; func <= cardbusfunchigh; func++) {
  174                 struct cardbus_devinfo *dinfo;
  175 
  176                 dinfo = (struct cardbus_devinfo *)
  177                     pci_read_device(brdev, domain, bus, slot, func,
  178                         sizeof(struct cardbus_devinfo));
  179                 if (dinfo == NULL)
  180                         continue;
  181                 if (dinfo->pci.cfg.mfdev)
  182                         cardbusfunchigh = PCI_FUNCMAX;
  183 
  184                 child = device_add_child(cbdev, NULL, -1);
  185                 if (child == NULL) {
  186                         DEVPRINTF((cbdev, "Cannot add child!\n"));
  187                         pci_freecfg((struct pci_devinfo *)dinfo);
  188                         continue;
  189                 }
  190                 dinfo->pci.cfg.dev = child;
  191                 resource_list_init(&dinfo->pci.resources);
  192                 device_set_ivars(child, dinfo);
  193                 cardbus_device_create(sc, dinfo, cbdev, child);
  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         if (numdevs == 0) {
  223                 free(devlist, M_TEMP);
  224                 return (ENOENT);
  225         }
  226 
  227         for (tmp = 0; tmp < numdevs; tmp++) {
  228                 struct cardbus_devinfo *dinfo = device_get_ivars(devlist[tmp]);
  229                 int status = device_get_state(devlist[tmp]);
  230 
  231                 if (dinfo->pci.cfg.dev != devlist[tmp])
  232                         device_printf(cbdev, "devinfo dev mismatch\n");
  233                 if (status == DS_ATTACHED || status == DS_BUSY)
  234                         device_detach(devlist[tmp]);
  235                 cardbus_release_all_resources(cbdev, dinfo);
  236                 cardbus_device_destroy(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                 if (bootverbose)
  276                         printf("pci%d:%d:%d:%d: reprobing on driver added\n",
  277                             dinfo->pci.cfg.domain, dinfo->pci.cfg.bus,
  278                             dinfo->pci.cfg.slot, dinfo->pci.cfg.func);
  279                 pci_cfg_restore(dinfo->pci.cfg.dev, &dinfo->pci);
  280                 if (device_probe_and_attach(dev) != 0)
  281                         pci_cfg_save(dev, &dinfo->pci, 1);
  282         }
  283         free(devlist, M_TEMP);
  284 }
  285 
  286 static void
  287 cardbus_release_all_resources(device_t cbdev, struct cardbus_devinfo *dinfo)
  288 {
  289         struct resource_list_entry *rle;
  290         device_t dev;
  291 
  292         /* Turn off access to resources we're about to free */
  293         dev = dinfo->pci.cfg.dev;
  294         pci_write_config(dev, PCIR_COMMAND,
  295             pci_read_config(dev, PCIR_COMMAND, 2) &
  296             ~(PCIM_CMD_MEMEN | PCIM_CMD_PORTEN), 2);
  297         /* Free all allocated resources */
  298         STAILQ_FOREACH(rle, &dinfo->pci.resources, link) {
  299                 if (rle->res) {
  300                         BUS_RELEASE_RESOURCE(device_get_parent(cbdev),
  301                             cbdev, rle->type, rle->rid, rle->res);
  302                         rle->res = NULL;
  303                 }
  304         }
  305         resource_list_free(&dinfo->pci.resources);
  306 }
  307 
  308 /************************************************************************/
  309 /* Other Bus Methods                                                    */
  310 /************************************************************************/
  311 
  312 static int
  313 cardbus_read_ivar(device_t cbdev, device_t child, int which, uintptr_t *result)
  314 {
  315         struct cardbus_devinfo *dinfo;
  316         pcicfgregs *cfg;
  317 
  318         dinfo = device_get_ivars(child);
  319         cfg = &dinfo->pci.cfg;
  320 
  321         switch (which) {
  322         case PCI_IVAR_ETHADDR:
  323                 /*
  324                  * The generic accessor doesn't deal with failure, so
  325                  * we set the return value, then return an error.
  326                  */
  327                 if (dinfo->fepresent & (1 << PCCARD_TPLFE_TYPE_LAN_NID)) {
  328                         *((uint8_t **) result) = dinfo->funce.lan.nid;
  329                         break;
  330                 }
  331                 *((uint8_t **) result) = NULL;
  332                 return (EINVAL);
  333         default:
  334                 return (pci_read_ivar(cbdev, child, which, result));
  335         }
  336         return 0;
  337 }
  338 
  339 static device_method_t cardbus_methods[] = {
  340         /* Device interface */
  341         DEVMETHOD(device_probe,         cardbus_probe),
  342         DEVMETHOD(device_attach,        cardbus_attach),
  343         DEVMETHOD(device_detach,        cardbus_detach),
  344         DEVMETHOD(device_suspend,       cardbus_suspend),
  345         DEVMETHOD(device_resume,        cardbus_resume),
  346 
  347         /* Bus interface */
  348         DEVMETHOD(bus_get_dma_tag,      bus_generic_get_dma_tag),
  349         DEVMETHOD(bus_read_ivar,        cardbus_read_ivar),
  350         DEVMETHOD(bus_write_ivar,       pci_write_ivar),
  351         DEVMETHOD(bus_driver_added,     cardbus_driver_added),
  352 
  353         /* Card Interface */
  354         DEVMETHOD(card_attach_card,     cardbus_attach_card),
  355         DEVMETHOD(card_detach_card,     cardbus_detach_card),
  356 
  357         {0,0}
  358 };
  359 
  360 DEFINE_CLASS_1(cardbus, cardbus_driver, cardbus_methods,
  361     sizeof(struct cardbus_softc), pci_driver);
  362 
  363 static devclass_t cardbus_devclass;
  364 
  365 DRIVER_MODULE(cardbus, cbb, cardbus_driver, cardbus_devclass, 0, 0);
  366 MODULE_VERSION(cardbus, 1);

Cache object: c2f0677b21ed405ea3b10fa1f3cafd9e


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