sys/dev/crypto/tpm/tpm_acpi.c

   1 /*
   2  * Copyright (c) 2008, 2009 Michael Shalayeff
   3  * Copyright (c) 2009, 2010 Hans-Joerg Hoexer
   4  * All rights reserved.
   5  *
   6  * Permission to use, copy, modify, and distribute this software for any
   7  * purpose with or without fee is hereby granted, provided that the above
   8  * copyright notice and this permission notice appear in all copies.
   9  *
  10  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  11  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  12  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  13  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  14  * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER IN
  15  * AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
  16  * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  17  *
  18  * $FreeBSD: src/sys/dev/tpm/tpm_acpi.c,v 1.1 2010/08/12 00:16:18 takawata Exp $
  19  */
  20
  21 #include <sys/param.h>
  22 #include <sys/systm.h>
  23 #include <sys/kernel.h>
  24 #include <sys/malloc.h>
  25 #include <sys/proc.h>
  26
  27 #include <sys/module.h>
  28 #include <sys/conf.h>
  29 #include <sys/uio.h>
  30 #include <sys/bus.h>
  31
  32 #include <sys/rman.h>
  33
  34 #include <machine/md_var.h>
  35
  36 #include <bus/isa/isareg.h>
  37 #include <bus/isa/isavar.h>
  38 #include "tpmvar.h"
  39
  40 #include "opt_acpi.h"
  41 #include <contrib/dev/acpica/source/include/acpi.h>
  42 #include <contrib/dev/acpica/source/include/accommon.h>
  43 #include <dev/acpica/acpivar.h>
  44
  45
  46
  47 char *tpm_ids[] = {"ATM1200",  "BCM0102", "INTC0102", "SNO3504", "WEC1000",
  48     "PNP0C31", NULL};
  49
  50 static int
  51 tpm_acpi_probe(device_t dev)
  52 {
  53         if (ACPI_ID_PROBE(device_get_parent(dev), dev, tpm_ids) != NULL) {
  54                 device_set_desc(dev, "Trusted Platform Module");
  55                 return BUS_PROBE_DEFAULT;
  56         }
  57
  58         return ENXIO;
  59 }
  60
  61 static device_method_t tpm_acpi_methods[] = {
  62 #if 0
  63         /*In some case, TPM existance is found only in TPCA header*/
  64         DEVMETHOD(device_identify,      tpm_acpi_identify),
  65 #endif
  66
  67         DEVMETHOD(device_probe,         tpm_acpi_probe),
  68         DEVMETHOD(device_attach,        tpm_attach),
  69         DEVMETHOD(device_detach,        tpm_detach),
  70         DEVMETHOD(device_suspend,       tpm_suspend),
  71         DEVMETHOD(device_resume,        tpm_resume),
  72         { 0, 0 }
  73 };
  74 static driver_t tpm_acpi_driver = {
  75         "tpm", tpm_acpi_methods, sizeof(struct tpm_softc),
  76 };
  77
  78 devclass_t tpm_devclass;
  79 DRIVER_MODULE(tpm, acpi, tpm_acpi_driver, tpm_devclass, NULL, NULL);