tpm_acpi.c revision 1.1
1/* $NetBSD: tpm_acpi.c,v 1.1 2012/01/22 06:44:28 christos Exp $ */ 2 3/*- 4 * Copyright (c) 2012 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Christos Zoulas. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31/* 32 * Copyright (c) 2008, 2009 Michael Shalayeff 33 * Copyright (c) 2009, 2010 Hans-J�rg H�xer 34 * All rights reserved. 35 * 36 * Permission to use, copy, modify, and distribute this software for any 37 * purpose with or without fee is hereby granted, provided that the above 38 * copyright notice and this permission notice appear in all copies. 39 * 40 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 41 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 42 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 43 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 44 * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER IN 45 * AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT 46 * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 47 */ 48 49/* 50 * ACPI attachment for the Infineon SLD 9630 TT 1.1 and SLB 9635 TT 1.2 51 * trusted platform module. See www.trustedcomputinggroup.org 52 */ 53 54#include <sys/cdefs.h> 55__KERNEL_RCSID(0, "$NetBSD: tpm_acpi.c,v 1.1 2012/01/22 06:44:28 christos Exp $"); 56 57#include <sys/param.h> 58#include <sys/device.h> 59#include <sys/systm.h> 60#include <sys/device.h> 61#include <sys/bus.h> 62#include <sys/pmf.h> 63 64#include <dev/ic/tpmreg.h> 65#include <dev/ic/tpmvar.h> 66 67#include <dev/acpi/acpireg.h> 68#include <dev/acpi/acpivar.h> 69 70#include <dev/isa/isavar.h> 71 72#define _COMPONENT ACPI_RESOURCE_COMPONENT 73ACPI_MODULE_NAME ("tpm_acpi") 74 75static int tpm_acpi_match(device_t, cfdata_t, void *); 76static void tpm_acpi_attach(device_t, device_t, void *); 77 78 79CFATTACH_DECL_NEW(tpm_acpi, sizeof(struct tpm_softc), tpm_acpi_match, 80 tpm_acpi_attach, NULL, NULL); 81 82/* 83 * Supported device IDs 84 */ 85 86static const char * const tpm_acpi_ids[] = { 87 "IFX0101", 88 "IFX0102", 89 NULL 90}; 91 92extern struct cfdriver tpm_cd; 93 94static int 95tpm_acpi_match(device_t parent, cfdata_t match, void *aux) 96{ 97 struct acpi_attach_args *aa = aux; 98 99 if (aa->aa_node->ad_type != ACPI_TYPE_DEVICE) 100 return 0; 101 102 /* There can be only one. */ 103 if (tpm_cd.cd_devs && tpm_cd.cd_devs[0]) 104 return 0; 105 106#ifdef notyet 107 // XXX: My sony can't find the IRQ 108 return acpi_match_hid(aa->aa_node->ad_devinfo, tpm_acpi_ids); 109#else 110 return 0; 111#endif 112} 113 114static void 115tpm_acpi_attach(device_t parent, device_t self, void *aux) 116{ 117 struct tpm_softc *sc = device_private(self); 118 struct acpi_attach_args *aa = aux; 119 struct acpi_resources res; 120 struct acpi_mem *mem; 121 struct acpi_irq *irq; 122 int rv; 123 124 sc->sc_dev = self; 125 126 /* Parse our resources */ 127 rv = acpi_resource_parse(self, aa->aa_node->ad_handle, "_CRS", &res, 128 &acpi_resource_parse_ops_default); 129 130 if (ACPI_FAILURE(rv)) { 131 aprint_error_dev(sc->sc_dev, "cannot parse resources %d\n", rv); 132 return; 133 } 134 135 mem = acpi_res_mem(&res, 0); 136 if (mem == NULL) { 137 aprint_error_dev(sc->sc_dev, "cannot find mem\n"); 138 goto out; 139 } 140 141 if (mem->ar_length != TPM_SIZE) { 142 aprint_error_dev(sc->sc_dev, "wrong size mem %u != %u\n", 143 mem->ar_length, TPM_SIZE); 144 goto out; 145 } 146 147 sc->sc_bt = aa->aa_memt; 148 sc->sc_init = tpm_tis12_init; 149 sc->sc_start = tpm_tis12_start; 150 sc->sc_read = tpm_tis12_read; 151 sc->sc_write = tpm_tis12_write; 152 sc->sc_end = tpm_tis12_end; 153 154 if (bus_space_map(sc->sc_bt, mem->ar_base, mem->ar_length, 0, 155 &sc->sc_bh)) { 156 aprint_error_dev(sc->sc_dev, "cannot map registers\n"); 157 goto out; 158 } 159 160 irq = acpi_res_irq(&res, 0); 161 if (irq == NULL) { 162 aprint_error_dev(sc->sc_dev, "cannot find irq\n"); 163 goto out1; 164 } 165 166 if ((rv = (*sc->sc_init)(sc, irq->ar_irq, 167 device_xname(sc->sc_dev))) != 0) 168 aprint_error_dev(sc->sc_dev, "cannot init device %d\n", rv); 169 goto out1; 170 171 if ((sc->sc_ih = isa_intr_establish(aa->aa_ic, irq->ar_irq, 172 IST_EDGE, IPL_TTY, tpm_intr, sc)) == NULL) { 173 aprint_error_dev(sc->sc_dev, "cannot establish interrupt\n"); 174 goto out1; 175 } 176 177 if (!pmf_device_register(sc->sc_dev, tpm_suspend, tpm_resume)) 178 aprint_error_dev(sc->sc_dev, "Cannot set power mgmt handler\n"); 179 return; 180out1: 181 bus_space_unmap(sc->sc_bt, sc->sc_bh, TPM_SIZE); 182out: 183 acpi_resource_cleanup(&res); 184} 185