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  *    without modification, immediately at the beginning of the file.
   11  * 2. Redistributions in binary form must reproduce the above copyright
   12  *    notice, this list of conditions and the following disclaimer in
   13  *    the documentation and/or other materials provided with the
   14  *    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 FOR
   20  * 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 
   30 #include <sys/cdefs.h>
   31 __FBSDID("$FreeBSD: releng/5.3/sys/dev/cardbus/cardbus.c 131190 2004-06-27 13:07:02Z imp $");
   32 
   33 #include <sys/param.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/pccardvar.h>
   54 
   55 #include "power_if.h"
   56 #include "pcib_if.h"
   57 
   58 /* sysctl vars */
   59 SYSCTL_NODE(_hw, OID_AUTO, cardbus, CTLFLAG_RD, 0, "CardBus parameters");
   60 
   61 int    cardbus_debug = 0;
   62 TUNABLE_INT("hw.cardbus.debug", &cardbus_debug);
   63 SYSCTL_INT(_hw_cardbus, OID_AUTO, debug, CTLFLAG_RW,
   64     &cardbus_debug, 0,
   65   "CardBus debug");
   66 
   67 int    cardbus_cis_debug = 0;
   68 TUNABLE_INT("hw.cardbus.cis_debug", &cardbus_cis_debug);
   69 SYSCTL_INT(_hw_cardbus, OID_AUTO, cis_debug, CTLFLAG_RW,
   70     &cardbus_cis_debug, 0,
   71   "CardBus CIS debug");
   72 
   73 #define DPRINTF(a) if (cardbus_debug) printf a
   74 #define DEVPRINTF(x) if (cardbus_debug) device_printf x
   75 
   76 
   77 static int      cardbus_attach(device_t cbdev);
   78 static int      cardbus_attach_card(device_t cbdev);
   79 static int      cardbus_detach(device_t cbdev);
   80 static int      cardbus_detach_card(device_t cbdev);
   81 static void     cardbus_device_setup_regs(device_t brdev, int b, int s, int f,
   82                     pcicfgregs *cfg);
   83 static void     cardbus_driver_added(device_t cbdev, driver_t *driver);
   84 static int      cardbus_probe(device_t cbdev);
   85 static int      cardbus_read_ivar(device_t cbdev, device_t child, int which,
   86                     uintptr_t *result);
   87 static void     cardbus_release_all_resources(device_t cbdev,
   88                     struct cardbus_devinfo *dinfo);
   89 static int      cardbus_write_ivar(device_t cbdev, device_t child, int which,
   90                     uintptr_t value);
   91 
   92 /************************************************************************/
   93 /* Probe/Attach                                                         */
   94 /************************************************************************/
   95 
   96 static int
   97 cardbus_probe(device_t cbdev)
   98 {
   99         device_set_desc(cbdev, "CardBus bus");
  100         return 0;
  101 }
  102 
  103 static int
  104 cardbus_attach(device_t cbdev)
  105 {
  106         return 0;
  107 }
  108 
  109 static int
  110 cardbus_detach(device_t cbdev)
  111 {
  112         cardbus_detach_card(cbdev);
  113         return 0;
  114 }
  115 
  116 static int
  117 cardbus_suspend(device_t self)
  118 {
  119         cardbus_detach_card(self);
  120         return (0);
  121 }
  122 
  123 static int
  124 cardbus_resume(device_t self)
  125 {
  126         return (0);
  127 }
  128 
  129 /************************************************************************/
  130 /* Attach/Detach card                                                   */
  131 /************************************************************************/
  132 
  133 static void
  134 cardbus_device_setup_regs(device_t brdev, int b, int s, int f, pcicfgregs *cfg)
  135 {
  136         PCIB_WRITE_CONFIG(brdev, b, s, f, PCIR_INTLINE,
  137             pci_get_irq(device_get_parent(brdev)), 1);
  138         cfg->intline = PCIB_READ_CONFIG(brdev, b, s, f, PCIR_INTLINE, 1);
  139 
  140         PCIB_WRITE_CONFIG(brdev, b, s, f, PCIR_CACHELNSZ, 0x08, 1);
  141         cfg->cachelnsz = PCIB_READ_CONFIG(brdev, b, s, f, PCIR_CACHELNSZ, 1);
  142 
  143         PCIB_WRITE_CONFIG(brdev, b, s, f, PCIR_LATTIMER, 0xa8, 1);
  144         cfg->lattimer = PCIB_READ_CONFIG(brdev, b, s, f, PCIR_LATTIMER, 1);
  145 
  146         PCIB_WRITE_CONFIG(brdev, b, s, f, PCIR_MINGNT, 0x14, 1);
  147         cfg->mingnt = PCIB_READ_CONFIG(brdev, b, s, f, PCIR_MINGNT, 1);
  148 
  149         PCIB_WRITE_CONFIG(brdev, b, s, f, PCIR_MAXLAT, 0x14, 1);
  150         cfg->maxlat = PCIB_READ_CONFIG(brdev, b, s, f, PCIR_MAXLAT, 1);
  151 }
  152 
  153 static int
  154 cardbus_attach_card(device_t cbdev)
  155 {
  156         device_t brdev = device_get_parent(cbdev);
  157         int cardattached = 0;
  158         int bus, slot, func;
  159 
  160         cardbus_detach_card(cbdev); /* detach existing cards */
  161         POWER_ENABLE_SOCKET(brdev, cbdev);
  162         bus = pcib_get_bus(cbdev);
  163         /* For each function, set it up and try to attach a driver to it */
  164         for (slot = 0; slot <= CARDBUS_SLOTMAX; slot++) {
  165                 int cardbusfunchigh = 0;
  166                 for (func = 0; func <= cardbusfunchigh; func++) {
  167                         struct cardbus_devinfo *dinfo;
  168 
  169                         dinfo = (struct cardbus_devinfo *)
  170                             pci_read_device(brdev, bus, slot, func,
  171                                 sizeof(struct cardbus_devinfo));
  172                         if (dinfo == NULL)
  173                                 continue;
  174                         if (dinfo->pci.cfg.mfdev)
  175                                 cardbusfunchigh = CARDBUS_FUNCMAX;
  176 
  177                         cardbus_device_setup_regs(brdev, bus, slot, func,
  178                             &dinfo->pci.cfg);
  179                         dinfo->pci.cfg.dev = device_add_child(cbdev, NULL, -1);
  180                         if (!dinfo->pci.cfg.dev) {
  181                                 DEVPRINTF((cbdev, "Cannot add child!\n"));
  182                                 pci_freecfg((struct pci_devinfo *)dinfo);
  183                                 continue;
  184                         }
  185                         resource_list_init(&dinfo->pci.resources);
  186                         device_set_ivars(dinfo->pci.cfg.dev, dinfo);
  187                         cardbus_do_cis(cbdev, dinfo->pci.cfg.dev);
  188                         pci_print_verbose(&dinfo->pci);
  189                         if (device_probe_and_attach(dinfo->pci.cfg.dev) != 0)
  190                                 cardbus_release_all_resources(cbdev, dinfo);
  191                         else
  192                                 cardattached++;
  193                 }
  194         }
  195 
  196         if (cardattached > 0)
  197                 return (0);
  198         POWER_DISABLE_SOCKET(brdev, cbdev);
  199         return (ENOENT);
  200 }
  201 
  202 static int
  203 cardbus_detach_card(device_t cbdev)
  204 {
  205         int numdevs;
  206         device_t *devlist;
  207         int tmp;
  208         int err = 0;
  209 
  210         device_get_children(cbdev, &devlist, &numdevs);
  211 
  212         if (numdevs == 0) {
  213                 free(devlist, M_TEMP);
  214                 return (ENOENT);
  215         }
  216 
  217         for (tmp = 0; tmp < numdevs; tmp++) {
  218                 struct cardbus_devinfo *dinfo = device_get_ivars(devlist[tmp]);
  219                 int status = device_get_state(devlist[tmp]);
  220 
  221                 if (dinfo->pci.cfg.dev != devlist[tmp])
  222                         device_printf(cbdev, "devinfo dev mismatch\n");
  223                 if (status == DS_ATTACHED || status == DS_BUSY)
  224                         device_detach(devlist[tmp]);
  225                 cardbus_release_all_resources(cbdev, dinfo);
  226                 device_delete_child(cbdev, devlist[tmp]);
  227                 pci_freecfg((struct pci_devinfo *)dinfo);
  228         }
  229         POWER_DISABLE_SOCKET(device_get_parent(cbdev), cbdev);
  230         free(devlist, M_TEMP);
  231         return (err);
  232 }
  233 
  234 static void
  235 cardbus_driver_added(device_t cbdev, driver_t *driver)
  236 {
  237         int numdevs;
  238         device_t *devlist;
  239         device_t dev;
  240         int i;
  241         struct cardbus_devinfo *dinfo;
  242 
  243         DEVICE_IDENTIFY(driver, cbdev);
  244         device_get_children(cbdev, &devlist, &numdevs);
  245         /*
  246          * If there are no drivers attached, but there are children,
  247          * then power the card up.
  248          */
  249         for (i = 0; i < numdevs; i++) {
  250                 dev = devlist[i];
  251                 if (device_get_state(dev) != DS_NOTPRESENT)
  252                     break;
  253         }
  254         if (i > 0 && i == numdevs)
  255                 POWER_ENABLE_SOCKET(device_get_parent(cbdev), cbdev);
  256         for (i = 0; i < numdevs; i++) {
  257                 dev = devlist[i];
  258                 if (device_get_state(dev) != DS_NOTPRESENT)
  259                         continue;
  260                 dinfo = device_get_ivars(dev);
  261                 pci_print_verbose(&dinfo->pci);
  262                 resource_list_init(&dinfo->pci.resources);
  263                 cardbus_do_cis(cbdev, dev);
  264                 if (device_probe_and_attach(dev) != 0)
  265                         cardbus_release_all_resources(cbdev, dinfo);
  266         }
  267         free(devlist, M_TEMP);
  268 }
  269 
  270 static void
  271 cardbus_release_all_resources(device_t cbdev, struct cardbus_devinfo *dinfo)
  272 {
  273         struct resource_list_entry *rle;
  274 
  275         /* Free all allocated resources */
  276         SLIST_FOREACH(rle, &dinfo->pci.resources, link) {
  277                 if (rle->res) {
  278                         if (rman_get_device(rle->res) != cbdev)
  279                                 device_printf(cbdev, "release_all_resource: "
  280                                     "Resource still owned by child, oops. "
  281                                     "(type=%d, rid=%d, addr=%lx)\n",
  282                                     rle->type, rle->rid,
  283                                     rman_get_start(rle->res));
  284                         BUS_RELEASE_RESOURCE(device_get_parent(cbdev),
  285                             cbdev, rle->type, rle->rid, rle->res);
  286                         rle->res = NULL;
  287                         /*
  288                          * zero out config so the card won't acknowledge
  289                          * access to the space anymore
  290                          */
  291                         pci_write_config(dinfo->pci.cfg.dev, rle->rid, 0, 4);
  292                 }
  293         }
  294         resource_list_free(&dinfo->pci.resources);
  295 }
  296 
  297 /************************************************************************/
  298 /* Other Bus Methods                                                    */
  299 /************************************************************************/
  300 
  301 static int
  302 cardbus_read_ivar(device_t cbdev, device_t child, int which, uintptr_t *result)
  303 {
  304         struct cardbus_devinfo *dinfo;
  305         pcicfgregs *cfg;
  306 
  307         dinfo = device_get_ivars(child);
  308         cfg = &dinfo->pci.cfg;
  309 
  310         switch (which) {
  311         case PCI_IVAR_ETHADDR:
  312                 /*
  313                  * The generic accessor doesn't deal with failure, so
  314                  * we set the return value, then return an error.
  315                  */
  316                 if ((dinfo->fepresent & (1 << TPL_FUNCE_LAN_NID)) == 0) {
  317                         *((uint8_t **) result) = NULL;
  318                         return (EINVAL);
  319                 }
  320                 *((uint8_t **) result) = dinfo->funce.lan.nid;
  321                 break;
  322         default:
  323                 return (pci_read_ivar(cbdev, child, which, result));
  324         }
  325         return 0;
  326 }
  327 
  328 static int
  329 cardbus_write_ivar(device_t cbdev, device_t child, int which, uintptr_t value)
  330 {
  331         return(pci_write_ivar(cbdev, child, which, value));
  332 }
  333 
  334 static device_method_t cardbus_methods[] = {
  335         /* Device interface */
  336         DEVMETHOD(device_probe,         cardbus_probe),
  337         DEVMETHOD(device_attach,        cardbus_attach),
  338         DEVMETHOD(device_detach,        cardbus_detach),
  339         DEVMETHOD(device_suspend,       cardbus_suspend),
  340         DEVMETHOD(device_resume,        cardbus_resume),
  341 
  342         /* Bus interface */
  343         DEVMETHOD(bus_read_ivar,        cardbus_read_ivar),
  344         DEVMETHOD(bus_write_ivar,       cardbus_write_ivar),
  345         DEVMETHOD(bus_driver_added,     cardbus_driver_added),
  346 
  347         /* Card Interface */
  348         DEVMETHOD(card_attach_card,     cardbus_attach_card),
  349         DEVMETHOD(card_detach_card,     cardbus_detach_card),
  350 
  351         {0,0}
  352 };
  353 
  354 DECLARE_CLASS(pci_driver);
  355 DEFINE_CLASS_1(cardbus, cardbus_driver, cardbus_methods, 0, pci_driver);
  356 
  357 static devclass_t cardbus_devclass;
  358 
  359 DRIVER_MODULE(cardbus, cbb, cardbus_driver, cardbus_devclass, 0, 0);
  360 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
