diff options
Diffstat (limited to 'sys/dev/tpm/tpm_tis_acpi.c')
| -rw-r--r-- | sys/dev/tpm/tpm_tis_acpi.c | 86 |
1 files changed, 86 insertions, 0 deletions
diff --git a/sys/dev/tpm/tpm_tis_acpi.c b/sys/dev/tpm/tpm_tis_acpi.c new file mode 100644 index 000000000000..32c73e5f2483 --- /dev/null +++ b/sys/dev/tpm/tpm_tis_acpi.c @@ -0,0 +1,86 @@ +/*- + * Copyright (c) 2018 Stormshield. + * Copyright (c) 2018 Semihalf. + * Copyright (c) 2023 Juniper Networks, Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED + * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE + * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, + * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR + * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + */ + +#include <sys/cdefs.h> +#include "tpm20.h" +#include "tpm_if.h" + +static int tpmtis_acpi_probe(device_t dev); + +char *tpmtis_ids[] = {"MSFT0101", NULL}; + +static int +tpmtis_acpi_probe(device_t dev) +{ + int err; + ACPI_TABLE_TPM23 *tbl; + ACPI_STATUS status; + + err = ACPI_ID_PROBE(device_get_parent(dev), dev, tpmtis_ids, NULL); + if (err > 0) + return (err); + /*Find TPM2 Header*/ + status = AcpiGetTable(ACPI_SIG_TPM2, 1, (ACPI_TABLE_HEADER **) &tbl); + if(ACPI_FAILURE(status) || + tbl->StartMethod != TPM2_START_METHOD_TIS) + err = ENXIO; + + device_set_desc(dev, "Trusted Platform Module 2.0, FIFO mode"); + return (err); +} + +static int +tpmtis_acpi_attach(device_t dev) +{ + struct tpm_sc *sc = device_get_softc(dev); + + sc->mem_rid = 0; + sc->mem_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &sc->mem_rid, + RF_ACTIVE); + if (sc->mem_res == NULL) { + return (ENXIO); + } + + /* + * If tpmtis_attach() fails, tpmtis_detach() will automatically free + * sc->mem_res (not-NULL). + */ + return (tpmtis_attach(dev)); +} + +/* ACPI Driver */ +static device_method_t tpmtis_methods[] = { + DEVMETHOD(device_attach, tpmtis_acpi_attach), + DEVMETHOD(device_probe, tpmtis_acpi_probe), + DEVMETHOD_END +}; + +DEFINE_CLASS_2(tpmtis, tpmtis_acpi_driver, tpmtis_methods, + sizeof(struct tpm_sc), tpmtis_driver, tpm_bus_driver); + +DRIVER_MODULE(tpmtis, acpi, tpmtis_driver, 0, 0); |