1 /* $NetBSD: qemufwcfg_acpi.c,v 1.1 2017/11/25 16:31:03 jmcneill Exp $ */ 2 3 /*- 4 * Copyright (c) 2017 Jared McNeill <jmcneill@invisible.ca> 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 WARRANTIES 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 21 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 22 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 23 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 24 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 #include <sys/cdefs.h> 30 __KERNEL_RCSID(0, "$NetBSD: qemufwcfg_acpi.c,v 1.1 2017/11/25 16:31:03 jmcneill Exp $"); 31 32 #include <sys/param.h> 33 #include <sys/device.h> 34 #include <sys/systm.h> 35 #include <sys/mutex.h> 36 #include <sys/bus.h> 37 38 #include <dev/acpi/acpireg.h> 39 #include <dev/acpi/acpivar.h> 40 41 #include <dev/ic/qemufwcfgvar.h> 42 43 #define _COMPONENT ACPI_RESOURCE_COMPONENT 44 ACPI_MODULE_NAME ("qemufwcfg_acpi") 45 46 static int fwcfg_acpi_match(device_t, cfdata_t, void *); 47 static void fwcfg_acpi_attach(device_t, device_t, void *); 48 49 CFATTACH_DECL_NEW(qemufwcfg_acpi, sizeof(struct fwcfg_softc), 50 fwcfg_acpi_match, 51 fwcfg_acpi_attach, 52 NULL, 53 NULL 54 ); 55 56 static const char * const fwcfg_acpi_ids[] = { 57 "QEMU0002", 58 NULL 59 }; 60 61 static int 62 fwcfg_acpi_match(device_t parent, cfdata_t match, void *opaque) 63 { 64 struct acpi_attach_args *aa = opaque; 65 66 if (aa->aa_node->ad_type != ACPI_TYPE_DEVICE) 67 return 0; 68 69 return acpi_match_hid(aa->aa_node->ad_devinfo, fwcfg_acpi_ids); 70 } 71 72 static void 73 fwcfg_acpi_attach(device_t parent, device_t self, void *opaque) 74 { 75 struct fwcfg_softc *sc = device_private(self); 76 struct acpi_attach_args *aa = opaque; 77 struct acpi_resources res; 78 struct acpi_mem *mem; 79 struct acpi_io *io; 80 bus_addr_t base; 81 bus_size_t size; 82 ACPI_STATUS rv; 83 84 rv = acpi_resource_parse(self, aa->aa_node->ad_handle, "_CRS", 85 &res, &acpi_resource_parse_ops_default); 86 if (ACPI_FAILURE(rv)) 87 return; 88 89 sc->sc_dev = self; 90 91 if ((io = acpi_res_io(&res, 0)) != NULL) { 92 sc->sc_bst = aa->aa_iot; 93 base = io->ar_base; 94 size = io->ar_length; 95 } else if ((mem = acpi_res_mem(&res, 0)) != NULL) { 96 sc->sc_bst = aa->aa_memt; 97 base = mem->ar_base; 98 size = mem->ar_length; 99 } else { 100 aprint_error_dev(self, "couldn't acquire resources\n"); 101 return; 102 } 103 acpi_resource_cleanup(&res); 104 105 if (bus_space_map(sc->sc_bst, base, size, 0, &sc->sc_bsh) != 0) { 106 aprint_error_dev(self, "couldn't map registers\n"); 107 return; 108 } 109 110 fwcfg_attach(sc); 111 112 pmf_device_register(self, NULL, NULL); 113 } 114