1 /*- 2 * Copyright (c) 2018 Stormshield. 3 * Copyright (c) 2018 Semihalf. 4 * Copyright (c) 2023 Juniper Networks, Inc. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 18 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 19 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, 20 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 21 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 22 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 24 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN 25 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 26 * POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29 #include <sys/cdefs.h> 30 #include "tpm20.h" 31 #include "tpm_if.h" 32 33 static int tpmtis_acpi_probe(device_t dev); 34 35 char *tpmtis_ids[] = {"MSFT0101", NULL}; 36 37 static int 38 tpmtis_acpi_probe(device_t dev) 39 { 40 int err; 41 ACPI_TABLE_TPM23 *tbl; 42 ACPI_STATUS status; 43 44 err = ACPI_ID_PROBE(device_get_parent(dev), dev, tpmtis_ids, NULL); 45 if (err > 0) 46 return (err); 47 /*Find TPM2 Header*/ 48 status = AcpiGetTable(ACPI_SIG_TPM2, 1, (ACPI_TABLE_HEADER **) &tbl); 49 if(ACPI_FAILURE(status) || 50 tbl->StartMethod != TPM2_START_METHOD_TIS) 51 err = ENXIO; 52 53 device_set_desc(dev, "Trusted Platform Module 2.0, FIFO mode"); 54 return (err); 55 } 56 57 static int 58 tpmtis_acpi_attach(device_t dev) 59 { 60 struct tpm_sc *sc = device_get_softc(dev); 61 62 sc->mem_rid = 0; 63 sc->mem_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &sc->mem_rid, 64 RF_ACTIVE); 65 if (sc->mem_res == NULL) { 66 return (ENXIO); 67 } 68 69 /* 70 * If tpmtis_attach() fails, tpmtis_detach() will automatically free 71 * sc->mem_res (not-NULL). 72 */ 73 return (tpmtis_attach(dev)); 74 } 75 76 /* ACPI Driver */ 77 static device_method_t tpmtis_methods[] = { 78 DEVMETHOD(device_attach, tpmtis_acpi_attach), 79 DEVMETHOD(device_probe, tpmtis_acpi_probe), 80 DEVMETHOD_END 81 }; 82 83 DEFINE_CLASS_2(tpmtis, tpmtis_acpi_driver, tpmtis_methods, 84 sizeof(struct tpm_sc), tpmtis_driver, tpm_bus_driver); 85 86 DRIVER_MODULE(tpmtis, acpi, tpmtis_driver, 0, 0); 87