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/11.0/sys/dev/cardbus/cardbus.c 298712 2016-04-27 17:49:42Z 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 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);
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FreeBSD/Linux Kernel Cross Reference sys/dev/cardbus/cardbus.c

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