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/10.0/sys/dev/cardbus/cardbus.c 232403 2012-03-02 20:38:04Z 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 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 
   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 
  100         sc = device_get_softc(cbdev);
  101         sc->sc_dev = cbdev;
  102         return (0);
  103 }
  104 
  105 static int
  106 cardbus_detach(device_t cbdev)
  107 {
  108 
  109         cardbus_detach_card(cbdev);
  110         return (0);
  111 }
  112 
  113 static int
  114 cardbus_suspend(device_t self)
  115 {
  116 
  117         cardbus_detach_card(self);
  118         return (0);
  119 }
  120 
  121 static int
  122 cardbus_resume(device_t self)
  123 {
  124 
  125         return (0);
  126 }
  127 
  128 /************************************************************************/
  129 /* Attach/Detach card                                                   */
  130 /************************************************************************/
  131 
  132 static void
  133 cardbus_device_setup_regs(pcicfgregs *cfg)
  134 {
  135         device_t dev = cfg->dev;
  136         int i;
  137 
  138         /*
  139          * Some cards power up with garbage in their BARs.  This
  140          * code clears all that junk out.
  141          */
  142         for (i = 0; i < PCIR_MAX_BAR_0; i++)
  143                 pci_write_config(dev, PCIR_BAR(i), 0, 4);
  144 
  145         cfg->intline =
  146             pci_get_irq(device_get_parent(device_get_parent(dev)));
  147         pci_write_config(dev, PCIR_INTLINE, cfg->intline, 1);
  148         pci_write_config(dev, PCIR_CACHELNSZ, 0x08, 1);
  149         pci_write_config(dev, PCIR_LATTIMER, 0xa8, 1);
  150         pci_write_config(dev, PCIR_MINGNT, 0x14, 1);
  151         pci_write_config(dev, PCIR_MAXLAT, 0x14, 1);
  152 }
  153 
  154 static int
  155 cardbus_attach_card(device_t cbdev)
  156 {
  157         device_t brdev = device_get_parent(cbdev);
  158         device_t child;
  159         int bus, domain, slot, func;
  160         int cardattached = 0;
  161         int cardbusfunchigh = 0;
  162         struct cardbus_softc *sc;
  163 
  164         sc = device_get_softc(cbdev);
  165         cardbus_detach_card(cbdev); /* detach existing cards */
  166         POWER_ENABLE_SOCKET(brdev, cbdev);
  167         domain = pcib_get_domain(cbdev);
  168         bus = pcib_get_bus(cbdev);
  169         slot = 0;
  170         /* For each function, set it up and try to attach a driver to it */
  171         for (func = 0; func <= cardbusfunchigh; func++) {
  172                 struct cardbus_devinfo *dinfo;
  173 
  174                 dinfo = (struct cardbus_devinfo *)
  175                     pci_read_device(brdev, domain, bus, slot, func,
  176                         sizeof(struct cardbus_devinfo));
  177                 if (dinfo == NULL)
  178                         continue;
  179                 if (dinfo->pci.cfg.mfdev)
  180                         cardbusfunchigh = PCI_FUNCMAX;
  181 
  182                 child = device_add_child(cbdev, NULL, -1);
  183                 if (child == NULL) {
  184                         DEVPRINTF((cbdev, "Cannot add child!\n"));
  185                         pci_freecfg((struct pci_devinfo *)dinfo);
  186                         continue;
  187                 }
  188                 dinfo->pci.cfg.dev = child;
  189                 resource_list_init(&dinfo->pci.resources);
  190                 device_set_ivars(child, dinfo);
  191                 cardbus_device_create(sc, dinfo, cbdev, child);
  192                 if (cardbus_do_cis(cbdev, child) != 0)
  193                         DEVPRINTF((cbdev, "Warning: Bogus CIS ignored\n"));
  194                 pci_cfg_save(dinfo->pci.cfg.dev, &dinfo->pci, 0);
  195                 pci_cfg_restore(dinfo->pci.cfg.dev, &dinfo->pci);
  196                 cardbus_device_setup_regs(&dinfo->pci.cfg);
  197                 pci_add_resources(cbdev, child, 1, dinfo->mprefetchable);
  198                 pci_print_verbose(&dinfo->pci);
  199                 if (device_probe_and_attach(child) == 0)
  200                         cardattached++;
  201                 else
  202                         pci_cfg_save(dinfo->pci.cfg.dev, &dinfo->pci, 1);
  203         }
  204         if (cardattached > 0)
  205                 return (0);
  206 /*      POWER_DISABLE_SOCKET(brdev, cbdev); */
  207         return (ENOENT);
  208 }
  209 
  210 static int
  211 cardbus_detach_card(device_t cbdev)
  212 {
  213         int numdevs;
  214         device_t *devlist;
  215         int tmp;
  216         int err = 0;
  217 
  218         if (device_get_children(cbdev, &devlist, &numdevs) != 0)
  219                 return (ENOENT);
  220         if (numdevs == 0) {
  221                 free(devlist, M_TEMP);
  222                 return (ENOENT);
  223         }
  224 
  225         for (tmp = 0; tmp < numdevs; tmp++) {
  226                 struct cardbus_devinfo *dinfo = device_get_ivars(devlist[tmp]);
  227 
  228                 if (dinfo->pci.cfg.dev != devlist[tmp])
  229                         device_printf(cbdev, "devinfo dev mismatch\n");
  230                 cardbus_device_destroy(dinfo);
  231                 pci_delete_child(cbdev, devlist[tmp]);
  232         }
  233         POWER_DISABLE_SOCKET(device_get_parent(cbdev), cbdev);
  234         free(devlist, M_TEMP);
  235         return (err);
  236 }
  237 
  238 static void
  239 cardbus_driver_added(device_t cbdev, driver_t *driver)
  240 {
  241         int numdevs;
  242         device_t *devlist;
  243         device_t dev;
  244         int i;
  245         struct cardbus_devinfo *dinfo;
  246 
  247         DEVICE_IDENTIFY(driver, cbdev);
  248         if (device_get_children(cbdev, &devlist, &numdevs) != 0)
  249                 return;
  250 
  251         /*
  252          * If there are no drivers attached, but there are children,
  253          * then power the card up.
  254          */
  255         for (i = 0; i < numdevs; i++) {
  256                 dev = devlist[i];
  257                 if (device_get_state(dev) != DS_NOTPRESENT)
  258                     break;
  259         }
  260         if (i > 0 && i == numdevs)
  261                 POWER_ENABLE_SOCKET(device_get_parent(cbdev), cbdev);
  262         for (i = 0; i < numdevs; i++) {
  263                 dev = devlist[i];
  264                 if (device_get_state(dev) != DS_NOTPRESENT)
  265                         continue;
  266                 dinfo = device_get_ivars(dev);
  267                 pci_print_verbose(&dinfo->pci);
  268                 if (bootverbose)
  269                         printf("pci%d:%d:%d:%d: reprobing on driver added\n",
  270                             dinfo->pci.cfg.domain, dinfo->pci.cfg.bus,
  271                             dinfo->pci.cfg.slot, dinfo->pci.cfg.func);
  272                 pci_cfg_restore(dinfo->pci.cfg.dev, &dinfo->pci);
  273                 if (device_probe_and_attach(dev) != 0)
  274                         pci_cfg_save(dev, &dinfo->pci, 1);
  275         }
  276         free(devlist, M_TEMP);
  277 }
  278 
  279 /************************************************************************/
  280 /* Other Bus Methods                                                    */
  281 /************************************************************************/
  282 
  283 static int
  284 cardbus_read_ivar(device_t cbdev, device_t child, int which, uintptr_t *result)
  285 {
  286         struct cardbus_devinfo *dinfo;
  287         pcicfgregs *cfg;
  288 
  289         dinfo = device_get_ivars(child);
  290         cfg = &dinfo->pci.cfg;
  291 
  292         switch (which) {
  293         case PCI_IVAR_ETHADDR:
  294                 /*
  295                  * The generic accessor doesn't deal with failure, so
  296                  * we set the return value, then return an error.
  297                  */
  298                 if (dinfo->fepresent & (1 << PCCARD_TPLFE_TYPE_LAN_NID)) {
  299                         *((uint8_t **) result) = dinfo->funce.lan.nid;
  300                         break;
  301                 }
  302                 *((uint8_t **) result) = NULL;
  303                 return (EINVAL);
  304         default:
  305                 return (pci_read_ivar(cbdev, child, which, result));
  306         }
  307         return 0;
  308 }
  309 
  310 static device_method_t cardbus_methods[] = {
  311         /* Device interface */
  312         DEVMETHOD(device_probe,         cardbus_probe),
  313         DEVMETHOD(device_attach,        cardbus_attach),
  314         DEVMETHOD(device_detach,        cardbus_detach),
  315         DEVMETHOD(device_suspend,       cardbus_suspend),
  316         DEVMETHOD(device_resume,        cardbus_resume),
  317 
  318         /* Bus interface */
  319         DEVMETHOD(bus_get_dma_tag,      bus_generic_get_dma_tag),
  320         DEVMETHOD(bus_read_ivar,        cardbus_read_ivar),
  321         DEVMETHOD(bus_driver_added,     cardbus_driver_added),
  322 
  323         /* Card Interface */
  324         DEVMETHOD(card_attach_card,     cardbus_attach_card),
  325         DEVMETHOD(card_detach_card,     cardbus_detach_card),
  326 
  327         {0,0}
  328 };
  329 
  330 DEFINE_CLASS_1(cardbus, cardbus_driver, cardbus_methods,
  331     sizeof(struct cardbus_softc), pci_driver);
  332 
  333 static devclass_t cardbus_devclass;
  334 
  335 DRIVER_MODULE(cardbus, cbb, cardbus_driver, cardbus_devclass, 0, 0);
  336 MODULE_VERSION(cardbus, 1);
Cache object: b7d4f0fa78b0009eb11d85c01196618a
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FreeBSD/Linux Kernel Cross Reference sys/dev/cardbus/cardbus.c

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