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/* $NetBSD: tpm_isa.c,v 1.8 2021/01/16 00:43:03 thorpej Exp $ */
/*
* Copyright (c) 2019 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Maxime Villard.
*
* 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 NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``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 FOUNDATION OR CONTRIBUTORS
* 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.
*/
/*
* Copyright (c) 2008, 2009 Michael Shalayeff
* Copyright (c) 2009, 2010 Hans-Joerg Hoexer
* All rights reserved.
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER IN
* AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
* OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: tpm_isa.c,v 1.8 2021/01/16 00:43:03 thorpej Exp $");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/device.h>
#include <sys/bus.h>
#include <sys/pmf.h>
#include <dev/ic/tpmreg.h>
#include <dev/ic/tpmvar.h>
#include <dev/isa/isareg.h>
#include <dev/isa/isavar.h>
#include "ioconf.h"
static int tpm_isa_match(device_t, cfdata_t, void *);
static void tpm_isa_attach(device_t, device_t, void *);
CFATTACH_DECL_NEW(tpm_isa, sizeof(struct tpm_softc), tpm_isa_match,
tpm_isa_attach, NULL, NULL);
static int
tpm_isa_match(device_t parent, cfdata_t match, void *aux)
{
struct isa_attach_args *ia = aux;
bus_space_tag_t bt = ia->ia_memt;
bus_space_handle_t bh;
int rv;
/* There can be only one. */
if (tpm_cd.cd_devs && tpm_cd.cd_devs[0])
return 0;
if (ia->ia_iomem[0].ir_addr == ISA_UNKNOWN_IOMEM)
return 0;
/* XXX: integer locator sign extension */
if (bus_space_map(bt, (unsigned int)ia->ia_iomem[0].ir_addr,
TPM_SPACE_SIZE, 0, &bh))
return 0;
if ((rv = (*tpm_intf_tis12.probe)(bt, bh)) == 0) {
ia->ia_nio = 0;
ia->ia_io[0].ir_size = 0;
ia->ia_iomem[0].ir_size = TPM_SPACE_SIZE;
}
ia->ia_ndrq = 0;
bus_space_unmap(bt, bh, TPM_SPACE_SIZE);
return (rv == 0) ? 1 : 0;
}
static void
tpm_isa_attach(device_t parent, device_t self, void *aux)
{
struct tpm_softc *sc = device_private(self);
struct isa_attach_args *ia = aux;
bus_addr_t base;
bus_size_t size;
int rv;
base = (unsigned int)ia->ia_iomem[0].ir_addr;
size = TPM_SPACE_SIZE;
aprint_normal("\n");
aprint_naive("\n");
sc->sc_dev = self;
sc->sc_ver = TPM_1_2;
mutex_init(&sc->sc_lock, MUTEX_DEFAULT, IPL_NONE);
sc->sc_busy = false;
sc->sc_intf = &tpm_intf_tis12;
sc->sc_bt = ia->ia_memt;
if (bus_space_map(sc->sc_bt, base, size, 0, &sc->sc_bh)) {
aprint_error_dev(sc->sc_dev, "cannot map registers\n");
return;
}
if ((rv = (*sc->sc_intf->init)(sc)) != 0) {
aprint_error_dev(sc->sc_dev, "cannot init device, rv=%d\n", rv);
bus_space_unmap(sc->sc_bt, sc->sc_bh, size);
return;
}
if (!pmf_device_register(self, tpm_suspend, tpm_resume))
aprint_error_dev(self, "couldn't establish power handler\n");
}
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