vpd.c

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    1 /*-
    2  * Copyright (c) 2003 Matthew N. Dodd <winter@jurai.net>
    3  * 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  * $FreeBSD: releng/5.1/sys/i386/bios/vpd.c 112553 2003-03-24 19:32:57Z mdodd $
   27  */
   28 
   29 /*
   30  * VPD decoder for IBM systems (Thinkpads)
   31  * http://www-1.ibm.com/support/docview.wss?uid=psg1MIGR-45120
   32  */
   33 
   34 #include <sys/param.h>
   35 #include <sys/systm.h>
   36 #include <sys/kernel.h>
   37 #include <sys/socket.h>
   38 #include <sys/sysctl.h>
   39 
   40 #include <sys/module.h>
   41 #include <sys/bus.h>
   42 
   43 #include <machine/bus.h>
   44 #include <machine/resource.h>
   45 #include <sys/rman.h>
   46 
   47 #include <vm/vm.h>
   48 #include <vm/pmap.h>
   49 #include <machine/md_var.h>
   50 #include <machine/pc/bios.h>
   51 
   52 /*
   53  * Vital Product Data
   54  */
   55 struct vpd {
   56         u_int16_t       Header;                 /* 0x55AA */
   57         u_int8_t        Signature[3];           /* Always 'VPD' */
   58         u_int8_t        Length;                 /* Sructure Length */
   59 
   60         u_int8_t        Reserved[7];            /* Reserved */
   61 
   62         u_int8_t        BuildID[9];             /* BIOS Build ID */
   63         u_int8_t        BoxSerial[7];           /* Box Serial Number */
   64         u_int8_t        PlanarSerial[11];       /* Motherboard Serial Number */
   65         u_int8_t        MachType[7];            /* Machine Type/Model */
   66         u_int8_t        Checksum;               /* Checksum */
   67 } __packed;
   68 
   69 struct vpd_softc {
   70         device_t                dev;
   71         struct resource *       res;
   72         int                     rid;
   73 
   74         struct vpd *            vpd;
   75 
   76         struct sysctl_ctx_list  ctx;
   77 
   78         char            BuildID[10];
   79         char            BoxSerial[8];
   80         char            PlanarSerial[12];
   81         char            MachineType[5];
   82         char            MachineModel[4];
   83 };
   84 
   85 #define VPD_START       0xf0000
   86 #define VPD_STEP        0x10
   87 #define VPD_OFF         2
   88 #define VPD_LEN         3
   89 #define VPD_SIG         "VPD"
   90 
   91 #define RES2VPD(res)    ((struct vpd *)rman_get_virtual(res))
   92 #define ADDR2VPD(addr)  ((struct vpd *)BIOS_PADDRTOVADDR(addr))
   93 
   94 static devclass_t vpd_devclass;
   95 
   96 static void     vpd_identify    (driver_t *, device_t);
   97 static int      vpd_probe       (device_t);
   98 static int      vpd_attach      (device_t);
   99 static int      vpd_detach      (device_t);
  100 static int      vpd_modevent    (module_t, int, void *);
  101 
  102 static int      vpd_cksum       (struct vpd *);
  103 
  104 SYSCTL_NODE(_hw, OID_AUTO, vpd, CTLFLAG_RD, NULL, NULL);
  105 SYSCTL_NODE(_hw_vpd, OID_AUTO, machine, CTLFLAG_RD, NULL, NULL);
  106 SYSCTL_NODE(_hw_vpd_machine, OID_AUTO, type, CTLFLAG_RD, NULL, NULL);
  107 SYSCTL_NODE(_hw_vpd_machine, OID_AUTO, model, CTLFLAG_RD, NULL, NULL);
  108 SYSCTL_NODE(_hw_vpd, OID_AUTO, build_id, CTLFLAG_RD, NULL, NULL);
  109 SYSCTL_NODE(_hw_vpd, OID_AUTO, serial, CTLFLAG_RD, NULL, NULL);
  110 SYSCTL_NODE(_hw_vpd_serial, OID_AUTO, box, CTLFLAG_RD, NULL, NULL);
  111 SYSCTL_NODE(_hw_vpd_serial, OID_AUTO, planar, CTLFLAG_RD, NULL, NULL);
  112 
  113 static void
  114 vpd_identify (driver_t *driver, device_t parent)
  115 {
  116         device_t child;
  117         u_int32_t addr;
  118         int length;
  119         int rid;
  120 
  121         if (!device_is_alive(parent))
  122                 return;
  123 
  124         addr = bios_sigsearch(VPD_START, VPD_SIG, VPD_LEN, VPD_STEP, VPD_OFF);
  125         if (addr != 0) {
  126                 rid = 0;
  127                 length = ADDR2VPD(addr)->Length;
  128 
  129                 child = BUS_ADD_CHILD(parent, 0, "vpd", -1);
  130                 device_set_driver(child, driver);
  131                 bus_set_resource(child, SYS_RES_MEMORY, rid, addr, length);
  132                 device_set_desc(child, "Vital Product Data Area");
  133         }
  134                 
  135         return;
  136 }
  137 
  138 static int
  139 vpd_probe (device_t dev)
  140 {
  141         struct resource *res;
  142         int rid;
  143         int error;
  144 
  145         error = 0;
  146         rid = 0;
  147         res = bus_alloc_resource(dev, SYS_RES_MEMORY, &rid,
  148                 0ul, ~0ul, 1, RF_ACTIVE);
  149         if (res == NULL) {
  150                 device_printf(dev, "Unable to allocate memory resource.\n");
  151                 error = ENOMEM;
  152                 goto bad;
  153         }
  154 
  155         if (vpd_cksum(RES2VPD(res))) {
  156                 device_printf(dev, "VPD checksum failed.\n");
  157                 error = ENXIO;
  158                 goto bad;
  159         }
  160 
  161 bad:
  162         if (res)
  163                 bus_release_resource(dev, SYS_RES_MEMORY, rid, res);
  164         return (error);
  165 }
  166 
  167 static int
  168 vpd_attach (device_t dev)
  169 {
  170         struct vpd_softc *sc;
  171         char unit[4];
  172         int error;
  173 
  174         sc = device_get_softc(dev);
  175         error = 0;
  176 
  177         sc->dev = dev;
  178         sc->rid = 0;
  179         sc->res = bus_alloc_resource(dev, SYS_RES_MEMORY, &sc->rid,
  180                 0ul, ~0ul, 1, RF_ACTIVE);
  181         if (sc->res == NULL) {
  182                 device_printf(dev, "Unable to allocate memory resource.\n");
  183                 error = ENOMEM;
  184                 goto bad;
  185         }
  186         sc->vpd = RES2VPD(sc->res);
  187 
  188         snprintf(unit, sizeof(unit), "%d", device_get_unit(sc->dev));
  189         snprintf(sc->MachineType, 5, "%.4s", sc->vpd->MachType);
  190         snprintf(sc->MachineModel, 4, "%.3s", sc->vpd->MachType+4);
  191         snprintf(sc->BuildID, 10, "%.9s", sc->vpd->BuildID);
  192         snprintf(sc->BoxSerial, 8, "%.7s", sc->vpd->BoxSerial);
  193         snprintf(sc->PlanarSerial, 12, "%.11s", sc->vpd->PlanarSerial);
  194 
  195         sysctl_ctx_init(&sc->ctx);
  196         SYSCTL_ADD_STRING(&sc->ctx,
  197                 SYSCTL_STATIC_CHILDREN(_hw_vpd_machine_type), OID_AUTO,
  198                 unit, CTLFLAG_RD|CTLFLAG_DYN, sc->MachineType, 0, NULL);
  199         SYSCTL_ADD_STRING(&sc->ctx,
  200                 SYSCTL_STATIC_CHILDREN(_hw_vpd_machine_model), OID_AUTO,
  201                 unit, CTLFLAG_RD|CTLFLAG_DYN, sc->MachineModel, 0, NULL);
  202         SYSCTL_ADD_STRING(&sc->ctx,
  203                 SYSCTL_STATIC_CHILDREN(_hw_vpd_build_id), OID_AUTO,
  204                 unit, CTLFLAG_RD|CTLFLAG_DYN, sc->BuildID, 0, NULL);
  205         SYSCTL_ADD_STRING(&sc->ctx,
  206                 SYSCTL_STATIC_CHILDREN(_hw_vpd_serial_box), OID_AUTO,
  207                 unit, CTLFLAG_RD|CTLFLAG_DYN, sc->BoxSerial, 0, NULL);
  208         SYSCTL_ADD_STRING(&sc->ctx,
  209                 SYSCTL_STATIC_CHILDREN(_hw_vpd_serial_planar), OID_AUTO,
  210                 unit, CTLFLAG_RD|CTLFLAG_DYN, sc->PlanarSerial, 0, NULL);
  211 
  212         device_printf(dev, "Machine Type: %.4s, Model: %.3s, Build ID: %.9s\n",
  213                 sc->MachineType, sc->MachineModel, sc->BuildID);
  214         device_printf(dev, "Box Serial: %.7s, Planar Serial: %.11s\n",
  215                 sc->BoxSerial, sc->PlanarSerial);
  216                 
  217         return (0);
  218 bad:
  219         if (sc->res)
  220                 bus_release_resource(dev, SYS_RES_MEMORY, sc->rid, sc->res);
  221         return (error);
  222 }
  223 
  224 static int
  225 vpd_detach (device_t dev)
  226 {
  227         struct vpd_softc *sc;
  228 
  229         sc = device_get_softc(dev);
  230 
  231         if (sc->res)
  232                 bus_release_resource(dev, SYS_RES_MEMORY, sc->rid, sc->res);
  233 
  234         sysctl_ctx_free(&sc->ctx);
  235 
  236         return (0);
  237 }
  238 
  239 static int
  240 vpd_modevent (mod, what, arg)
  241         module_t        mod;
  242         int             what;
  243         void *          arg;
  244 {
  245         device_t *      devs;
  246         int             count;
  247         int             i;
  248 
  249         switch (what) {
  250         case MOD_LOAD:
  251                 break;
  252         case MOD_UNLOAD:
  253                 devclass_get_devices(vpd_devclass, &devs, &count);
  254                 for (i = 0; i < count; i++) {
  255                         device_delete_child(device_get_parent(devs[i]), devs[i]);
  256                 }
  257                 break;
  258         default:
  259                 break;
  260         }
  261 
  262         return (0);
  263 }
  264 
  265 static device_method_t vpd_methods[] = {
  266         /* Device interface */
  267         DEVMETHOD(device_identify,      vpd_identify),
  268         DEVMETHOD(device_probe,         vpd_probe),
  269         DEVMETHOD(device_attach,        vpd_attach),
  270         DEVMETHOD(device_detach,        vpd_detach),
  271         { 0, 0 }
  272 };
  273 
  274 static driver_t vpd_driver = {
  275         "vpd",
  276         vpd_methods,
  277         sizeof(struct vpd_softc),
  278 };
  279 
  280 DRIVER_MODULE(vpd, nexus, vpd_driver, vpd_devclass, vpd_modevent, 0);
  281 MODULE_VERSION(vpd, 1);
  282 
  283 static int
  284 vpd_cksum (struct vpd *v)
  285 {
  286         u_int8_t *ptr;
  287         u_int8_t cksum;
  288         int i;
  289 
  290         ptr = (u_int8_t *)v;
  291         cksum = 0;
  292         for (i = 0; i < v->Length ; i++) {
  293                 cksum += ptr[i];
  294         }
  295 
  296         /* XXX: For some reason this isn't right. */
  297         printf("VPD cksum: 0x%02x\n", cksum);
  298         cksum = 0;
  299 
  300         return (cksum);
  301 }
Cache object: 64605067e4935acefead51341ff399d6
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FreeBSD/Linux Kernel Cross Reference sys/i386/bios/vpd.c

FreeBSD/Linux Kernel Cross Reference
sys/i386/bios/vpd.c
