cardbus.c

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    1 /*-
    2  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
    3  *
    4  * Copyright (c) 2000,2001 Jonathan Chen.  All rights reserved.
    5  * Copyright (c) 2003-2008 M. Warner Losh <imp@FreeBSD.org>
    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  * 2. Redistributions in binary form must reproduce the above copyright
   13  *    notice, this list of conditions and the following disclaimer in the
   14  *    documentation and/or other materials provided with the distribution.
   15  *
   16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   26  * SUCH DAMAGE.
   27  */
   28 
   29 #include <sys/cdefs.h>
   30 __FBSDID("$FreeBSD$");
   31 
   32 #include <sys/param.h>
   33 #include <sys/eventhandler.h>
   34 #include <sys/systm.h>
   35 #include <sys/malloc.h>
   36 #include <sys/module.h>
   37 #include <sys/kernel.h>
   38 #include <sys/sysctl.h>
   39 
   40 #include <sys/bus.h>
   41 #include <machine/bus.h>
   42 #include <sys/rman.h>
   43 #include <machine/resource.h>
   44 
   45 #include <sys/pciio.h>
   46 #include <dev/pci/pcivar.h>
   47 #include <dev/pci/pcireg.h>
   48 #include <dev/pci/pci_private.h>
   49 
   50 #include <dev/cardbus/cardbusreg.h>
   51 #include <dev/cardbus/cardbusvar.h>
   52 #include <dev/cardbus/cardbus_cis.h>
   53 #include <dev/pccard/pccard_cis.h>
   54 #include <dev/pccard/pccardvar.h>
   55 
   56 #include "power_if.h"
   57 #include "pcib_if.h"
   58 
   59 /* sysctl vars */
   60 static SYSCTL_NODE(_hw, OID_AUTO, cardbus, CTLFLAG_RD | CTLFLAG_MPSAFE, 0,
   61     "CardBus parameters");
   62 
   63 int    cardbus_debug = 0;
   64 SYSCTL_INT(_hw_cardbus, OID_AUTO, debug, CTLFLAG_RWTUN,
   65     &cardbus_debug, 0, "CardBus debug");
   66 
   67 int    cardbus_cis_debug = 0;
   68 SYSCTL_INT(_hw_cardbus, OID_AUTO, cis_debug, CTLFLAG_RWTUN,
   69     &cardbus_cis_debug, 0, "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 
   84 /************************************************************************/
   85 /* Probe/Attach                                                         */
   86 /************************************************************************/
   87 
   88 static int
   89 cardbus_probe(device_t cbdev)
   90 {
   91         device_set_desc(cbdev, "CardBus bus");
   92         return (0);
   93 }
   94 
   95 static int
   96 cardbus_attach(device_t cbdev)
   97 {
   98         struct cardbus_softc *sc;
   99 #ifdef PCI_RES_BUS
  100         int rid;
  101 #endif
  102 
  103         sc = device_get_softc(cbdev);
  104         sc->sc_dev = cbdev;
  105 #ifdef PCI_RES_BUS
  106         rid = 0;
  107         sc->sc_bus = bus_alloc_resource(cbdev, PCI_RES_BUS, &rid,
  108             pcib_get_bus(cbdev), pcib_get_bus(cbdev), 1, 0);
  109         if (sc->sc_bus == NULL) {
  110                 device_printf(cbdev, "failed to allocate bus number\n");
  111                 return (ENXIO);
  112         }
  113 #else
  114         device_printf(cbdev, "Your bus numbers may be AFU\n");
  115 #endif
  116         return (0);
  117 }
  118 
  119 static int
  120 cardbus_detach(device_t cbdev)
  121 {
  122 #ifdef PCI_RES_BUS
  123         struct cardbus_softc *sc;
  124 #endif
  125 
  126         cardbus_detach_card(cbdev);
  127 #ifdef PCI_RES_BUS
  128         sc = device_get_softc(cbdev);
  129         device_printf(cbdev, "Freeing up the allocatd bus\n");
  130         (void)bus_release_resource(cbdev, PCI_RES_BUS, 0, sc->sc_bus);
  131 #endif
  132         return (0);
  133 }
  134 
  135 static int
  136 cardbus_suspend(device_t self)
  137 {
  138 
  139         cardbus_detach_card(self);
  140         return (0);
  141 }
  142 
  143 static int
  144 cardbus_resume(device_t self)
  145 {
  146 
  147         return (0);
  148 }
  149 
  150 /************************************************************************/
  151 /* Attach/Detach card                                                   */
  152 /************************************************************************/
  153 
  154 static void
  155 cardbus_device_setup_regs(pcicfgregs *cfg)
  156 {
  157         device_t dev = cfg->dev;
  158         int i;
  159 
  160         /*
  161          * Some cards power up with garbage in their BARs.  This
  162          * code clears all that junk out.
  163          */
  164         for (i = 0; i < PCIR_MAX_BAR_0; i++)
  165                 pci_write_config(dev, PCIR_BAR(i), 0, 4);
  166 
  167         cfg->intline =
  168             pci_get_irq(device_get_parent(device_get_parent(dev)));
  169         pci_write_config(dev, PCIR_INTLINE, cfg->intline, 1);
  170         pci_write_config(dev, PCIR_CACHELNSZ, 0x08, 1);
  171         pci_write_config(dev, PCIR_LATTIMER, 0xa8, 1);
  172         pci_write_config(dev, PCIR_MINGNT, 0x14, 1);
  173         pci_write_config(dev, PCIR_MAXLAT, 0x14, 1);
  174 }
  175 
  176 static struct pci_devinfo *
  177 cardbus_alloc_devinfo(device_t dev)
  178 {
  179         struct cardbus_devinfo *dinfo;
  180 
  181         dinfo = malloc(sizeof(*dinfo), M_DEVBUF, M_WAITOK | M_ZERO);
  182         return (&dinfo->pci);
  183 }
  184 
  185 static int
  186 cardbus_attach_card(device_t cbdev)
  187 {
  188         device_t brdev = device_get_parent(cbdev);
  189         device_t child;
  190         int bus, domain, slot, func;
  191         int cardattached = 0;
  192         int cardbusfunchigh = 0;
  193         struct cardbus_softc *sc;
  194 
  195         sc = device_get_softc(cbdev);
  196         cardbus_detach_card(cbdev); /* detach existing cards */
  197         POWER_DISABLE_SOCKET(brdev, cbdev); /* Turn the socket off first */
  198         POWER_ENABLE_SOCKET(brdev, cbdev);
  199         domain = pcib_get_domain(cbdev);
  200         bus = pcib_get_bus(cbdev);
  201         slot = 0;
  202         mtx_lock(&Giant);
  203         /* For each function, set it up and try to attach a driver to it */
  204         for (func = 0; func <= cardbusfunchigh; func++) {
  205                 struct cardbus_devinfo *dinfo;
  206 
  207                 dinfo = (struct cardbus_devinfo *)
  208                     pci_read_device(brdev, cbdev, domain, bus, slot, func);
  209                 if (dinfo == NULL)
  210                         continue;
  211                 if (dinfo->pci.cfg.mfdev)
  212                         cardbusfunchigh = PCI_FUNCMAX;
  213 
  214                 child = device_add_child(cbdev, NULL, -1);
  215                 if (child == NULL) {
  216                         DEVPRINTF((cbdev, "Cannot add child!\n"));
  217                         pci_freecfg((struct pci_devinfo *)dinfo);
  218                         continue;
  219                 }
  220                 dinfo->pci.cfg.dev = child;
  221                 resource_list_init(&dinfo->pci.resources);
  222                 device_set_ivars(child, dinfo);
  223                 cardbus_device_create(sc, dinfo, cbdev, child);
  224                 if (cardbus_do_cis(cbdev, child) != 0)
  225                         DEVPRINTF((cbdev, "Warning: Bogus CIS ignored\n"));
  226                 pci_cfg_save(dinfo->pci.cfg.dev, &dinfo->pci, 0);
  227                 pci_cfg_restore(dinfo->pci.cfg.dev, &dinfo->pci);
  228                 cardbus_device_setup_regs(&dinfo->pci.cfg);
  229                 pci_add_resources(cbdev, child, 1, dinfo->mprefetchable);
  230                 pci_print_verbose(&dinfo->pci);
  231                 if (device_probe_and_attach(child) == 0)
  232                         cardattached++;
  233                 else
  234                         pci_cfg_save(dinfo->pci.cfg.dev, &dinfo->pci, 1);
  235         }
  236         mtx_unlock(&Giant);
  237         if (cardattached > 0)
  238                 return (0);
  239 /*      POWER_DISABLE_SOCKET(brdev, cbdev); */
  240         return (ENOENT);
  241 }
  242 
  243 static void
  244 cardbus_child_deleted(device_t cbdev, device_t child)
  245 {
  246         struct cardbus_devinfo *dinfo = device_get_ivars(child);
  247 
  248         if (dinfo->pci.cfg.dev != child)
  249                 device_printf(cbdev, "devinfo dev mismatch\n");
  250         cardbus_device_destroy(dinfo);
  251         pci_child_deleted(cbdev, child);
  252 }
  253 
  254 static int
  255 cardbus_detach_card(device_t cbdev)
  256 {
  257         int err = 0;
  258 
  259         err = bus_generic_detach(cbdev);
  260         if (err)
  261                 return (err);
  262         err = device_delete_children(cbdev);
  263         if (err)
  264                 return (err);
  265 
  266         POWER_DISABLE_SOCKET(device_get_parent(cbdev), cbdev);
  267         return (err);
  268 }
  269 
  270 static void
  271 cardbus_driver_added(device_t cbdev, driver_t *driver)
  272 {
  273         int numdevs;
  274         device_t *devlist;
  275         device_t dev;
  276         int i;
  277         struct cardbus_devinfo *dinfo;
  278 
  279         DEVICE_IDENTIFY(driver, cbdev);
  280         if (device_get_children(cbdev, &devlist, &numdevs) != 0)
  281                 return;
  282 
  283         /*
  284          * If there are no drivers attached, but there are children,
  285          * then power the card up.
  286          */
  287         for (i = 0; i < numdevs; i++) {
  288                 dev = devlist[i];
  289                 if (device_get_state(dev) != DS_NOTPRESENT)
  290                     break;
  291         }
  292         if (i > 0 && i == numdevs)
  293                 POWER_ENABLE_SOCKET(device_get_parent(cbdev), cbdev);
  294         for (i = 0; i < numdevs; i++) {
  295                 dev = devlist[i];
  296                 if (device_get_state(dev) != DS_NOTPRESENT)
  297                         continue;
  298                 dinfo = device_get_ivars(dev);
  299                 pci_print_verbose(&dinfo->pci);
  300                 if (bootverbose)
  301                         printf("pci%d:%d:%d:%d: reprobing on driver added\n",
  302                             dinfo->pci.cfg.domain, dinfo->pci.cfg.bus,
  303                             dinfo->pci.cfg.slot, dinfo->pci.cfg.func);
  304                 pci_cfg_restore(dinfo->pci.cfg.dev, &dinfo->pci);
  305                 if (device_probe_and_attach(dev) != 0)
  306                         pci_cfg_save(dev, &dinfo->pci, 1);
  307         }
  308         free(devlist, M_TEMP);
  309 }
  310 
  311 /************************************************************************/
  312 /* Other Bus Methods                                                    */
  313 /************************************************************************/
  314 
  315 static int
  316 cardbus_read_ivar(device_t cbdev, device_t child, int which, uintptr_t *result)
  317 {
  318         struct cardbus_devinfo *dinfo;
  319         pcicfgregs *cfg;
  320 
  321         dinfo = device_get_ivars(child);
  322         cfg = &dinfo->pci.cfg;
  323 
  324         switch (which) {
  325         case PCI_IVAR_ETHADDR:
  326                 /*
  327                  * The generic accessor doesn't deal with failure, so
  328                  * we set the return value, then return an error.
  329                  */
  330                 if (dinfo->fepresent & (1 << PCCARD_TPLFE_TYPE_LAN_NID)) {
  331                         *((uint8_t **) result) = dinfo->funce.lan.nid;
  332                         break;
  333                 }
  334                 *((uint8_t **) result) = NULL;
  335                 return (EINVAL);
  336         default:
  337                 return (pci_read_ivar(cbdev, child, which, result));
  338         }
  339         return 0;
  340 }
  341 
  342 static device_method_t cardbus_methods[] = {
  343         /* Device interface */
  344         DEVMETHOD(device_probe,         cardbus_probe),
  345         DEVMETHOD(device_attach,        cardbus_attach),
  346         DEVMETHOD(device_detach,        cardbus_detach),
  347         DEVMETHOD(device_suspend,       cardbus_suspend),
  348         DEVMETHOD(device_resume,        cardbus_resume),
  349 
  350         /* Bus interface */
  351         DEVMETHOD(bus_child_deleted,    cardbus_child_deleted),
  352         DEVMETHOD(bus_get_dma_tag,      bus_generic_get_dma_tag),
  353         DEVMETHOD(bus_read_ivar,        cardbus_read_ivar),
  354         DEVMETHOD(bus_driver_added,     cardbus_driver_added),
  355         DEVMETHOD(bus_rescan,           bus_null_rescan),
  356 
  357         /* Card Interface */
  358         DEVMETHOD(card_attach_card,     cardbus_attach_card),
  359         DEVMETHOD(card_detach_card,     cardbus_detach_card),
  360 
  361         /* PCI interface */
  362         DEVMETHOD(pci_alloc_devinfo,    cardbus_alloc_devinfo),
  363         {0,0}
  364 };
  365 
  366 DEFINE_CLASS_1(cardbus, cardbus_driver, cardbus_methods,
  367     sizeof(struct cardbus_softc), pci_driver);
  368 
  369 static devclass_t cardbus_devclass;
  370 
  371 DRIVER_MODULE(cardbus, cbb, cardbus_driver, cardbus_devclass, 0, 0);
  372 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
