114 lines
3.3 KiB
C
114 lines
3.3 KiB
C
/* $NetBSD: qemufwcfg_acpi.c,v 1.1 2017/11/25 16:31:03 jmcneill Exp $ */
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/*-
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* Copyright (c) 2017 Jared McNeill <jmcneill@invisible.ca>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: qemufwcfg_acpi.c,v 1.1 2017/11/25 16:31:03 jmcneill Exp $");
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#include <sys/param.h>
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#include <sys/device.h>
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#include <sys/systm.h>
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#include <sys/mutex.h>
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#include <sys/bus.h>
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#include <dev/acpi/acpireg.h>
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#include <dev/acpi/acpivar.h>
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#include <dev/ic/qemufwcfgvar.h>
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#define _COMPONENT ACPI_RESOURCE_COMPONENT
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ACPI_MODULE_NAME ("qemufwcfg_acpi")
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static int fwcfg_acpi_match(device_t, cfdata_t, void *);
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static void fwcfg_acpi_attach(device_t, device_t, void *);
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CFATTACH_DECL_NEW(qemufwcfg_acpi, sizeof(struct fwcfg_softc),
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fwcfg_acpi_match,
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fwcfg_acpi_attach,
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NULL,
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NULL
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);
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static const char * const fwcfg_acpi_ids[] = {
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"QEMU0002",
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NULL
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};
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static int
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fwcfg_acpi_match(device_t parent, cfdata_t match, void *opaque)
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{
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struct acpi_attach_args *aa = opaque;
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if (aa->aa_node->ad_type != ACPI_TYPE_DEVICE)
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return 0;
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return acpi_match_hid(aa->aa_node->ad_devinfo, fwcfg_acpi_ids);
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}
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static void
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fwcfg_acpi_attach(device_t parent, device_t self, void *opaque)
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{
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struct fwcfg_softc *sc = device_private(self);
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struct acpi_attach_args *aa = opaque;
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struct acpi_resources res;
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struct acpi_mem *mem;
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struct acpi_io *io;
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bus_addr_t base;
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bus_size_t size;
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ACPI_STATUS rv;
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rv = acpi_resource_parse(self, aa->aa_node->ad_handle, "_CRS",
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&res, &acpi_resource_parse_ops_default);
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if (ACPI_FAILURE(rv))
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return;
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sc->sc_dev = self;
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if ((io = acpi_res_io(&res, 0)) != NULL) {
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sc->sc_bst = aa->aa_iot;
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base = io->ar_base;
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size = io->ar_length;
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} else if ((mem = acpi_res_mem(&res, 0)) != NULL) {
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sc->sc_bst = aa->aa_memt;
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base = mem->ar_base;
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size = mem->ar_length;
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} else {
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aprint_error_dev(self, "couldn't acquire resources\n");
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return;
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}
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acpi_resource_cleanup(&res);
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if (bus_space_map(sc->sc_bst, base, size, 0, &sc->sc_bsh) != 0) {
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aprint_error_dev(self, "couldn't map registers\n");
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return;
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}
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fwcfg_attach(sc);
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pmf_device_register(self, NULL, NULL);
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}
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