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308 lines
7.8 KiB
C
308 lines
7.8 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause
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*
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* Copyright (c) 2003 Matthew N. Dodd <winter@jurai.net>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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/*
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* VPD decoder for IBM systems (Thinkpads)
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* http://www-1.ibm.com/support/docview.wss?uid=psg1MIGR-45120
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/socket.h>
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#include <sys/sysctl.h>
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#include <sys/module.h>
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#include <sys/bus.h>
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#include <machine/bus.h>
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#include <machine/resource.h>
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#include <sys/rman.h>
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#include <vm/vm.h>
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#include <vm/vm_param.h>
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#include <vm/pmap.h>
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#include <machine/md_var.h>
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#include <machine/pc/bios.h>
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/*
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* Vital Product Data
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*/
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struct vpd {
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u_int16_t Header; /* 0x55AA */
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u_int8_t Signature[3]; /* Always 'VPD' */
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u_int8_t Length; /* Sructure Length */
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u_int8_t Reserved[7]; /* Reserved */
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u_int8_t BuildID[9]; /* BIOS Build ID */
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u_int8_t BoxSerial[7]; /* Box Serial Number */
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u_int8_t PlanarSerial[11]; /* Motherboard Serial Number */
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u_int8_t MachType[7]; /* Machine Type/Model */
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u_int8_t Checksum; /* Checksum */
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} __packed;
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struct vpd_softc {
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device_t dev;
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struct resource * res;
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int rid;
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struct vpd * vpd;
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struct sysctl_ctx_list ctx;
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char BuildID[10];
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char BoxSerial[8];
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char PlanarSerial[12];
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char MachineType[5];
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char MachineModel[4];
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};
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#define VPD_START 0xf0000
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#define VPD_STEP 0x10
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#define VPD_OFF 2
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#define VPD_LEN 3
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#define VPD_SIG "VPD"
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#define RES2VPD(res) ((struct vpd *)rman_get_virtual(res))
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#define ADDR2VPD(addr) ((struct vpd *)BIOS_PADDRTOVADDR(addr))
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static void vpd_identify (driver_t *, device_t);
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static int vpd_probe (device_t);
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static int vpd_attach (device_t);
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static int vpd_detach (device_t);
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static int vpd_modevent (module_t, int, void *);
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static int vpd_cksum (struct vpd *);
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static SYSCTL_NODE(_hw, OID_AUTO, vpd, CTLFLAG_RD | CTLFLAG_MPSAFE, NULL,
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NULL);
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static SYSCTL_NODE(_hw_vpd, OID_AUTO, machine,
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CTLFLAG_RD | CTLFLAG_MPSAFE, NULL,
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NULL);
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static SYSCTL_NODE(_hw_vpd_machine, OID_AUTO, type,
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CTLFLAG_RD | CTLFLAG_MPSAFE, NULL,
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NULL);
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static SYSCTL_NODE(_hw_vpd_machine, OID_AUTO, model,
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CTLFLAG_RD | CTLFLAG_MPSAFE, NULL,
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NULL);
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static SYSCTL_NODE(_hw_vpd, OID_AUTO, build_id,
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CTLFLAG_RD | CTLFLAG_MPSAFE, NULL,
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NULL);
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static SYSCTL_NODE(_hw_vpd, OID_AUTO, serial,
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CTLFLAG_RD | CTLFLAG_MPSAFE, NULL,
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NULL);
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static SYSCTL_NODE(_hw_vpd_serial, OID_AUTO, box,
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CTLFLAG_RD | CTLFLAG_MPSAFE, NULL,
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NULL);
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static SYSCTL_NODE(_hw_vpd_serial, OID_AUTO, planar,
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CTLFLAG_RD | CTLFLAG_MPSAFE, NULL,
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NULL);
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static void
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vpd_identify (driver_t *driver, device_t parent)
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{
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device_t child;
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u_int32_t addr;
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int length;
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int rid;
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if (!device_is_alive(parent))
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return;
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addr = bios_sigsearch(VPD_START, VPD_SIG, VPD_LEN, VPD_STEP, VPD_OFF);
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if (addr != 0) {
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rid = 0;
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length = ADDR2VPD(addr)->Length;
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child = BUS_ADD_CHILD(parent, 5, "vpd", DEVICE_UNIT_ANY);
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device_set_driver(child, driver);
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bus_set_resource(child, SYS_RES_MEMORY, rid, addr, length);
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device_set_desc(child, "Vital Product Data Area");
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}
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return;
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}
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static int
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vpd_probe (device_t dev)
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{
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struct resource *res;
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int rid;
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int error;
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error = 0;
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rid = 0;
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res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid, RF_ACTIVE);
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if (res == NULL) {
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device_printf(dev, "Unable to allocate memory resource.\n");
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error = ENOMEM;
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goto bad;
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}
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if (vpd_cksum(RES2VPD(res)))
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device_printf(dev, "VPD checksum failed. BIOS update may be required.\n");
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bad:
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if (res)
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bus_release_resource(dev, SYS_RES_MEMORY, rid, res);
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return (error);
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}
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static int
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vpd_attach (device_t dev)
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{
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struct vpd_softc *sc;
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char unit[4];
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int error;
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sc = device_get_softc(dev);
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error = 0;
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sc->dev = dev;
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sc->rid = 0;
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sc->res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &sc->rid,
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RF_ACTIVE);
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if (sc->res == NULL) {
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device_printf(dev, "Unable to allocate memory resource.\n");
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error = ENOMEM;
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goto bad;
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}
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sc->vpd = RES2VPD(sc->res);
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snprintf(unit, sizeof(unit), "%d", device_get_unit(sc->dev));
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snprintf(sc->MachineType, 5, "%.4s", sc->vpd->MachType);
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snprintf(sc->MachineModel, 4, "%.3s", sc->vpd->MachType+4);
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snprintf(sc->BuildID, 10, "%.9s", sc->vpd->BuildID);
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snprintf(sc->BoxSerial, 8, "%.7s", sc->vpd->BoxSerial);
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snprintf(sc->PlanarSerial, 12, "%.11s", sc->vpd->PlanarSerial);
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sysctl_ctx_init(&sc->ctx);
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SYSCTL_ADD_STRING(&sc->ctx,
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SYSCTL_STATIC_CHILDREN(_hw_vpd_machine_type), OID_AUTO,
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unit, CTLFLAG_RD, sc->MachineType, 0, NULL);
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SYSCTL_ADD_STRING(&sc->ctx,
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SYSCTL_STATIC_CHILDREN(_hw_vpd_machine_model), OID_AUTO,
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unit, CTLFLAG_RD, sc->MachineModel, 0, NULL);
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SYSCTL_ADD_STRING(&sc->ctx,
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SYSCTL_STATIC_CHILDREN(_hw_vpd_build_id), OID_AUTO,
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unit, CTLFLAG_RD, sc->BuildID, 0, NULL);
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SYSCTL_ADD_STRING(&sc->ctx,
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SYSCTL_STATIC_CHILDREN(_hw_vpd_serial_box), OID_AUTO,
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unit, CTLFLAG_RD, sc->BoxSerial, 0, NULL);
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SYSCTL_ADD_STRING(&sc->ctx,
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SYSCTL_STATIC_CHILDREN(_hw_vpd_serial_planar), OID_AUTO,
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unit, CTLFLAG_RD, sc->PlanarSerial, 0, NULL);
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device_printf(dev, "Machine Type: %.4s, Model: %.3s, Build ID: %.9s\n",
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sc->MachineType, sc->MachineModel, sc->BuildID);
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device_printf(dev, "Box Serial: %.7s, Planar Serial: %.11s\n",
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sc->BoxSerial, sc->PlanarSerial);
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return (0);
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bad:
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if (sc->res)
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bus_release_resource(dev, SYS_RES_MEMORY, sc->rid, sc->res);
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return (error);
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}
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static int
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vpd_detach (device_t dev)
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{
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struct vpd_softc *sc;
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sc = device_get_softc(dev);
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if (sc->res)
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bus_release_resource(dev, SYS_RES_MEMORY, sc->rid, sc->res);
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sysctl_ctx_free(&sc->ctx);
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return (0);
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}
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static int
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vpd_modevent (module_t mod, int what, void *arg)
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{
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device_t * devs;
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int count;
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int i;
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switch (what) {
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case MOD_LOAD:
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break;
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case MOD_UNLOAD:
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devclass_get_devices(devclass_find("vpd"), &devs, &count);
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for (i = 0; i < count; i++) {
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device_delete_child(device_get_parent(devs[i]), devs[i]);
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}
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break;
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default:
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break;
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}
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return (0);
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}
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static device_method_t vpd_methods[] = {
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/* Device interface */
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DEVMETHOD(device_identify, vpd_identify),
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DEVMETHOD(device_probe, vpd_probe),
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DEVMETHOD(device_attach, vpd_attach),
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DEVMETHOD(device_detach, vpd_detach),
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{ 0, 0 }
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};
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static driver_t vpd_driver = {
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"vpd",
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vpd_methods,
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sizeof(struct vpd_softc),
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};
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DRIVER_MODULE(vpd, nexus, vpd_driver, vpd_modevent, 0);
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MODULE_VERSION(vpd, 1);
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/*
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* Perform a checksum over the VPD structure, starting with
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* the BuildID. (Jean Delvare <khali@linux-fr.org>)
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*/
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static int
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vpd_cksum (struct vpd *v)
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{
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u_int8_t *ptr;
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u_int8_t cksum;
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int i;
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ptr = (u_int8_t *)v;
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cksum = 0;
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for (i = offsetof(struct vpd, BuildID); i < v->Length ; i++)
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cksum += ptr[i];
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return (cksum);
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}
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