cardbus.c

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    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 bus, domain, slot, func;
  166         int cardattached = 0;
  167         int cardbusfunchigh = 0;
  168 
  169         cardbus_detach_card(cbdev); /* detach existing cards */
  170         POWER_ENABLE_SOCKET(brdev, cbdev);
  171         domain = pcib_get_domain(cbdev);
  172         bus = pcib_get_bus(cbdev);
  173         slot = 0;
  174         /* For each function, set it up and try to attach a driver to it */
  175         for (func = 0; func <= cardbusfunchigh; func++) {
  176                 struct cardbus_devinfo *dinfo;
  177 
  178                 dinfo = (struct cardbus_devinfo *)
  179                     pci_read_device(brdev, domain, bus, slot, func,
  180                         sizeof(struct cardbus_devinfo));
  181                 if (dinfo == NULL)
  182                         continue;
  183                 if (dinfo->pci.cfg.mfdev)
  184                         cardbusfunchigh = PCI_FUNCMAX;
  185 
  186                 child = device_add_child(cbdev, NULL, -1);
  187                 if (child == NULL) {
  188                         DEVPRINTF((cbdev, "Cannot add child!\n"));
  189                         pci_freecfg((struct pci_devinfo *)dinfo);
  190                         continue;
  191                 }
  192                 dinfo->pci.cfg.dev = child;
  193                 resource_list_init(&dinfo->pci.resources);
  194                 device_set_ivars(child, dinfo);
  195                 if (cardbus_do_cis(cbdev, child) != 0)
  196                         DEVPRINTF((cbdev, "Warning: Bogus CIS ignored\n"));
  197                 pci_cfg_save(dinfo->pci.cfg.dev, &dinfo->pci, 0);
  198                 pci_cfg_restore(dinfo->pci.cfg.dev, &dinfo->pci);
  199                 cardbus_device_setup_regs(&dinfo->pci.cfg);
  200                 pci_add_resources(cbdev, child, 1, dinfo->mprefetchable);
  201                 pci_print_verbose(&dinfo->pci);
  202                 if (device_probe_and_attach(child) == 0)
  203                         cardattached++;
  204                 else
  205                         pci_cfg_save(dinfo->pci.cfg.dev, &dinfo->pci, 1);
  206         }
  207         if (cardattached > 0)
  208                 return (0);
  209         POWER_DISABLE_SOCKET(brdev, cbdev);
  210         return (ENOENT);
  211 }
  212 
  213 static int
  214 cardbus_detach_card(device_t cbdev)
  215 {
  216         int numdevs;
  217         device_t *devlist;
  218         int tmp;
  219         int err = 0;
  220 
  221         if (device_get_children(cbdev, &devlist, &numdevs) != 0)
  222                 return (ENOENT);
  223 
  224         if (numdevs == 0) {
  225                 free(devlist, M_TEMP);
  226                 return (ENOENT);
  227         }
  228 
  229         for (tmp = 0; tmp < numdevs; tmp++) {
  230                 struct cardbus_devinfo *dinfo = device_get_ivars(devlist[tmp]);
  231                 int status = device_get_state(devlist[tmp]);
  232 
  233                 if (dinfo->pci.cfg.dev != devlist[tmp])
  234                         device_printf(cbdev, "devinfo dev mismatch\n");
  235                 if (status == DS_ATTACHED || status == DS_BUSY)
  236                         device_detach(devlist[tmp]);
  237                 cardbus_release_all_resources(cbdev, dinfo);
  238                 device_delete_child(cbdev, devlist[tmp]);
  239                 pci_freecfg((struct pci_devinfo *)dinfo);
  240         }
  241         POWER_DISABLE_SOCKET(device_get_parent(cbdev), cbdev);
  242         free(devlist, M_TEMP);
  243         return (err);
  244 }
  245 
  246 static void
  247 cardbus_driver_added(device_t cbdev, driver_t *driver)
  248 {
  249         int numdevs;
  250         device_t *devlist;
  251         device_t dev;
  252         int i;
  253         struct cardbus_devinfo *dinfo;
  254 
  255         DEVICE_IDENTIFY(driver, cbdev);
  256         if (device_get_children(cbdev, &devlist, &numdevs) != 0)
  257                 return;
  258 
  259         /*
  260          * If there are no drivers attached, but there are children,
  261          * then power the card up.
  262          */
  263         for (i = 0; i < numdevs; i++) {
  264                 dev = devlist[i];
  265                 if (device_get_state(dev) != DS_NOTPRESENT)
  266                     break;
  267         }
  268         if (i > 0 && i == numdevs)
  269                 POWER_ENABLE_SOCKET(device_get_parent(cbdev), cbdev);
  270         for (i = 0; i < numdevs; i++) {
  271                 dev = devlist[i];
  272                 if (device_get_state(dev) != DS_NOTPRESENT)
  273                         continue;
  274                 dinfo = device_get_ivars(dev);
  275                 pci_print_verbose(&dinfo->pci);
  276                 pci_cfg_restore(dinfo->pci.cfg.dev, &dinfo->pci);
  277                 if (device_probe_and_attach(dev) != 0)
  278                         pci_cfg_save(dev, &dinfo->pci, 1);
  279         }
  280         free(devlist, M_TEMP);
  281 }
  282 
  283 static void
  284 cardbus_release_all_resources(device_t cbdev, struct cardbus_devinfo *dinfo)
  285 {
  286         struct resource_list_entry *rle;
  287 
  288         /* Free all allocated resources */
  289         STAILQ_FOREACH(rle, &dinfo->pci.resources, link) {
  290                 if (rle->res) {
  291                         BUS_RELEASE_RESOURCE(device_get_parent(cbdev),
  292                             cbdev, rle->type, rle->rid, rle->res);
  293                         rle->res = NULL;
  294                         /*
  295                          * zero out config so the card won't acknowledge
  296                          * access to the space anymore. XXX doesn't handle
  297                          * 64-bit bars.
  298                          */
  299                         pci_write_config(dinfo->pci.cfg.dev, rle->rid, 0, 4);
  300                 }
  301         }
  302         resource_list_free(&dinfo->pci.resources);
  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 int
  337 cardbus_write_ivar(device_t cbdev, device_t child, int which, uintptr_t value)
  338 {
  339         return(pci_write_ivar(cbdev, child, which, value));
  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_read_ivar,        cardbus_read_ivar),
  352         DEVMETHOD(bus_write_ivar,       cardbus_write_ivar),
  353         DEVMETHOD(bus_driver_added,     cardbus_driver_added),
  354 
  355         /* Card Interface */
  356         DEVMETHOD(card_attach_card,     cardbus_attach_card),
  357         DEVMETHOD(card_detach_card,     cardbus_detach_card),
  358 
  359         {0,0}
  360 };
  361 
  362 DEFINE_CLASS_1(cardbus, cardbus_driver, cardbus_methods,
  363     sizeof(struct cardbus_softc), pci_driver);
  364 
  365 static devclass_t cardbus_devclass;
  366 
  367 DRIVER_MODULE(cardbus, cbb, cardbus_driver, cardbus_devclass, 0, 0);
  368 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
