1/* $NetBSD: tpm_isa.c,v 1.8 2021/01/16 00:43:03 thorpej Exp $ */ 2 3/* 4 * Copyright (c) 2019 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Maxime Villard. 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/* 33 * Copyright (c) 2008, 2009 Michael Shalayeff 34 * Copyright (c) 2009, 2010 Hans-Joerg Hoexer 35 * All rights reserved. 36 * 37 * Permission to use, copy, modify, and distribute this software for any 38 * purpose with or without fee is hereby granted, provided that the above 39 * copyright notice and this permission notice appear in all copies. 40 * 41 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 42 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 43 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 44 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 45 * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER IN 46 * AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT 47 * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 48 */ 49 50#include <sys/cdefs.h> 51__KERNEL_RCSID(0, "$NetBSD: tpm_isa.c,v 1.8 2021/01/16 00:43:03 thorpej Exp $"); 52 53#include <sys/param.h> 54#include <sys/systm.h> 55#include <sys/device.h> 56#include <sys/bus.h> 57#include <sys/pmf.h> 58 59#include <dev/ic/tpmreg.h> 60#include <dev/ic/tpmvar.h> 61 62#include <dev/isa/isareg.h> 63#include <dev/isa/isavar.h> 64 65#include "ioconf.h" 66 67static int tpm_isa_match(device_t, cfdata_t, void *); 68static void tpm_isa_attach(device_t, device_t, void *); 69 70CFATTACH_DECL_NEW(tpm_isa, sizeof(struct tpm_softc), tpm_isa_match, 71 tpm_isa_attach, NULL, NULL); 72 73static int 74tpm_isa_match(device_t parent, cfdata_t match, void *aux) 75{ 76 struct isa_attach_args *ia = aux; 77 bus_space_tag_t bt = ia->ia_memt; 78 bus_space_handle_t bh; 79 int rv; 80 81 /* There can be only one. */ 82 if (tpm_cd.cd_devs && tpm_cd.cd_devs[0]) 83 return 0; 84 85 if (ia->ia_iomem[0].ir_addr == ISA_UNKNOWN_IOMEM) 86 return 0; 87 88 /* XXX: integer locator sign extension */ 89 if (bus_space_map(bt, (unsigned int)ia->ia_iomem[0].ir_addr, 90 TPM_SPACE_SIZE, 0, &bh)) 91 return 0; 92 93 if ((rv = (*tpm_intf_tis12.probe)(bt, bh)) == 0) { 94 ia->ia_nio = 0; 95 ia->ia_io[0].ir_size = 0; 96 ia->ia_iomem[0].ir_size = TPM_SPACE_SIZE; 97 } 98 ia->ia_ndrq = 0; 99 100 bus_space_unmap(bt, bh, TPM_SPACE_SIZE); 101 return (rv == 0) ? 1 : 0; 102} 103 104static void 105tpm_isa_attach(device_t parent, device_t self, void *aux) 106{ 107 struct tpm_softc *sc = device_private(self); 108 struct isa_attach_args *ia = aux; 109 bus_addr_t base; 110 bus_size_t size; 111 int rv; 112 113 base = (unsigned int)ia->ia_iomem[0].ir_addr; 114 size = TPM_SPACE_SIZE; 115 116 aprint_normal("\n"); 117 aprint_naive("\n"); 118 119 sc->sc_dev = self; 120 sc->sc_ver = TPM_1_2; 121 mutex_init(&sc->sc_lock, MUTEX_DEFAULT, IPL_NONE); 122 sc->sc_busy = false; 123 sc->sc_intf = &tpm_intf_tis12; 124 sc->sc_bt = ia->ia_memt; 125 if (bus_space_map(sc->sc_bt, base, size, 0, &sc->sc_bh)) { 126 aprint_error_dev(sc->sc_dev, "cannot map registers\n"); 127 return; 128 } 129 130 if ((rv = (*sc->sc_intf->init)(sc)) != 0) { 131 aprint_error_dev(sc->sc_dev, "cannot init device, rv=%d\n", rv); 132 bus_space_unmap(sc->sc_bt, sc->sc_bh, size); 133 return; 134 } 135 136 if (!pmf_device_register(self, tpm_suspend, tpm_resume)) 137 aprint_error_dev(self, "couldn't establish power handler\n"); 138} 139