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("$FreeBSD$");
   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;
  103 
  104         sc = device_get_softc(cbdev);
  105         sc->sc_dev = cbdev;
  106         return (0);
  107 }
  108 
  109 static int
  110 cardbus_detach(device_t cbdev)
  111 {
  112 
  113         cardbus_detach_card(cbdev);
  114         return (0);
  115 }
  116 
  117 static int
  118 cardbus_suspend(device_t self)
  119 {
  120 
  121         cardbus_detach_card(self);
  122         return (0);
  123 }
  124 
  125 static int
  126 cardbus_resume(device_t self)
  127 {
  128 
  129         return (0);
  130 }
  131 
  132 /************************************************************************/
  133 /* Attach/Detach card                                                   */
  134 /************************************************************************/
  135 
  136 static void
  137 cardbus_device_setup_regs(pcicfgregs *cfg)
  138 {
  139         device_t dev = cfg->dev;
  140         int i;
  141 
  142         /*
  143          * Some cards power up with garbage in their BARs.  This
  144          * code clears all that junk out.
  145          */
  146         for (i = 0; i < PCIR_MAX_BAR_0; i++)
  147                 pci_write_config(dev, PCIR_BAR(i), 0, 4);
  148 
  149         cfg->intline =
  150             pci_get_irq(device_get_parent(device_get_parent(dev)));
  151         pci_write_config(dev, PCIR_INTLINE, cfg->intline, 1);
  152         pci_write_config(dev, PCIR_CACHELNSZ, 0x08, 1);
  153         pci_write_config(dev, PCIR_LATTIMER, 0xa8, 1);
  154         pci_write_config(dev, PCIR_MINGNT, 0x14, 1);
  155         pci_write_config(dev, PCIR_MAXLAT, 0x14, 1);
  156 }
  157 
  158 static int
  159 cardbus_attach_card(device_t cbdev)
  160 {
  161         device_t brdev = device_get_parent(cbdev);
  162         device_t child;
  163         int bus, domain, slot, func;
  164         int cardattached = 0;
  165         int cardbusfunchigh = 0;
  166         struct cardbus_softc *sc;
  167 
  168         sc = device_get_softc(cbdev);
  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                 cardbus_device_create(sc, dinfo, cbdev, child);
  196                 if (cardbus_do_cis(cbdev, child) != 0)
  197                         DEVPRINTF((cbdev, "Warning: Bogus CIS ignored\n"));
  198                 pci_cfg_save(dinfo->pci.cfg.dev, &dinfo->pci, 0);
  199                 pci_cfg_restore(dinfo->pci.cfg.dev, &dinfo->pci);
  200                 cardbus_device_setup_regs(&dinfo->pci.cfg);
  201                 pci_add_resources(cbdev, child, 1, dinfo->mprefetchable);
  202                 pci_print_verbose(&dinfo->pci);
  203                 if (device_probe_and_attach(child) == 0)
  204                         cardattached++;
  205                 else
  206                         pci_cfg_save(dinfo->pci.cfg.dev, &dinfo->pci, 1);
  207         }
  208         if (cardattached > 0)
  209                 return (0);
  210         POWER_DISABLE_SOCKET(brdev, cbdev);
  211         return (ENOENT);
  212 }
  213 
  214 static int
  215 cardbus_detach_card(device_t cbdev)
  216 {
  217         int numdevs;
  218         device_t *devlist;
  219         int tmp;
  220         int err = 0;
  221 
  222         if (device_get_children(cbdev, &devlist, &numdevs) != 0)
  223                 return (ENOENT);
  224 
  225         if (numdevs == 0) {
  226                 free(devlist, M_TEMP);
  227                 return (ENOENT);
  228         }
  229 
  230         for (tmp = 0; tmp < numdevs; tmp++) {
  231                 struct cardbus_devinfo *dinfo = device_get_ivars(devlist[tmp]);
  232                 int status = device_get_state(devlist[tmp]);
  233 
  234                 if (dinfo->pci.cfg.dev != devlist[tmp])
  235                         device_printf(cbdev, "devinfo dev mismatch\n");
  236                 if (status == DS_ATTACHED || status == DS_BUSY)
  237                         device_detach(devlist[tmp]);
  238                 cardbus_release_all_resources(cbdev, dinfo);
  239                 cardbus_device_destroy(dinfo);
  240                 device_delete_child(cbdev, devlist[tmp]);
  241                 pci_freecfg((struct pci_devinfo *)dinfo);
  242         }
  243         POWER_DISABLE_SOCKET(device_get_parent(cbdev), cbdev);
  244         free(devlist, M_TEMP);
  245         return (err);
  246 }
  247 
  248 static void
  249 cardbus_driver_added(device_t cbdev, driver_t *driver)
  250 {
  251         int numdevs;
  252         device_t *devlist;
  253         device_t dev;
  254         int i;
  255         struct cardbus_devinfo *dinfo;
  256 
  257         DEVICE_IDENTIFY(driver, cbdev);
  258         if (device_get_children(cbdev, &devlist, &numdevs) != 0)
  259                 return;
  260 
  261         /*
  262          * If there are no drivers attached, but there are children,
  263          * then power the card up.
  264          */
  265         for (i = 0; i < numdevs; i++) {
  266                 dev = devlist[i];
  267                 if (device_get_state(dev) != DS_NOTPRESENT)
  268                     break;
  269         }
  270         if (i > 0 && i == numdevs)
  271                 POWER_ENABLE_SOCKET(device_get_parent(cbdev), cbdev);
  272         for (i = 0; i < numdevs; i++) {
  273                 dev = devlist[i];
  274                 if (device_get_state(dev) != DS_NOTPRESENT)
  275                         continue;
  276                 dinfo = device_get_ivars(dev);
  277                 pci_print_verbose(&dinfo->pci);
  278                 pci_cfg_restore(dinfo->pci.cfg.dev, &dinfo->pci);
  279                 if (device_probe_and_attach(dev) != 0)
  280                         pci_cfg_save(dev, &dinfo->pci, 1);
  281         }
  282         free(devlist, M_TEMP);
  283 }
  284 
  285 static void
  286 cardbus_release_all_resources(device_t cbdev, struct cardbus_devinfo *dinfo)
  287 {
  288         struct resource_list_entry *rle;
  289 
  290         /* Free all allocated resources */
  291         STAILQ_FOREACH(rle, &dinfo->pci.resources, link) {
  292                 if (rle->res) {
  293                         BUS_RELEASE_RESOURCE(device_get_parent(cbdev),
  294                             cbdev, rle->type, rle->rid, rle->res);
  295                         rle->res = NULL;
  296                         /*
  297                          * zero out config so the card won't acknowledge
  298                          * access to the space anymore. XXX doesn't handle
  299                          * 64-bit bars.
  300                          */
  301                         pci_write_config(dinfo->pci.cfg.dev, rle->rid, 0, 4);
  302                 }
  303         }
  304         resource_list_free(&dinfo->pci.resources);
  305 }
  306 
  307 /************************************************************************/
  308 /* Other Bus Methods                                                    */
  309 /************************************************************************/
  310 
  311 static int
  312 cardbus_read_ivar(device_t cbdev, device_t child, int which, uintptr_t *result)
  313 {
  314         struct cardbus_devinfo *dinfo;
  315         pcicfgregs *cfg;
  316 
  317         dinfo = device_get_ivars(child);
  318         cfg = &dinfo->pci.cfg;
  319 
  320         switch (which) {
  321         case PCI_IVAR_ETHADDR:
  322                 /*
  323                  * The generic accessor doesn't deal with failure, so
  324                  * we set the return value, then return an error.
  325                  */
  326                 if (dinfo->fepresent & (1 << PCCARD_TPLFE_TYPE_LAN_NID)) {
  327                         *((uint8_t **) result) = dinfo->funce.lan.nid;
  328                         break;
  329                 }
  330                 *((uint8_t **) result) = NULL;
  331                 return (EINVAL);
  332         default:
  333                 return (pci_read_ivar(cbdev, child, which, result));
  334         }
  335         return 0;
  336 }
  337 
  338 static int
  339 cardbus_write_ivar(device_t cbdev, device_t child, int which, uintptr_t value)
  340 {
  341         return(pci_write_ivar(cbdev, child, which, value));
  342 }
  343 
  344 static device_method_t cardbus_methods[] = {
  345         /* Device interface */
  346         DEVMETHOD(device_probe,         cardbus_probe),
  347         DEVMETHOD(device_attach,        cardbus_attach),
  348         DEVMETHOD(device_detach,        cardbus_detach),
  349         DEVMETHOD(device_suspend,       cardbus_suspend),
  350         DEVMETHOD(device_resume,        cardbus_resume),
  351 
  352         /* Bus interface */
  353         DEVMETHOD(bus_read_ivar,        cardbus_read_ivar),
  354         DEVMETHOD(bus_write_ivar,       cardbus_write_ivar),
  355         DEVMETHOD(bus_driver_added,     cardbus_driver_added),
  356 
  357         /* Card Interface */
  358         DEVMETHOD(card_attach_card,     cardbus_attach_card),
  359         DEVMETHOD(card_detach_card,     cardbus_detach_card),
  360 
  361         {0,0}
  362 };
  363 
  364 DEFINE_CLASS_1(cardbus, cardbus_driver, cardbus_methods,
  365     sizeof(struct cardbus_softc), pci_driver);
  366 
  367 static devclass_t cardbus_devclass;
  368 
  369 DRIVER_MODULE(cardbus, cbb, cardbus_driver, cardbus_devclass, 0, 0);
  370 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
