1 /* $NetBSD: gfrtc_fdt.c,v 1.3 2024/01/02 07:34:27 thorpej Exp $ */ 2 3 /*- 4 * Copyright (c) 2023 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Nick Hudson 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 #include <sys/cdefs.h> 33 __KERNEL_RCSID(0, "$NetBSD: gfrtc_fdt.c,v 1.3 2024/01/02 07:34:27 thorpej Exp $"); 34 35 #include <sys/param.h> 36 37 #include <sys/bus.h> 38 #include <sys/device.h> 39 40 #include <dev/fdt/fdtvar.h> 41 #include <dev/goldfish/gfrtcvar.h> 42 43 /* 44 * https://android.googlesource.com/platform/external/qemu/+/master/docs/GOLDFISH-VIRTUAL-HARDWARE.TXT 45 */ 46 47 static const struct device_compatible_entry compat_data[] = { 48 { .compat = "google,goldfish-rtc" }, 49 DEVICE_COMPAT_EOL 50 }; 51 52 53 static int 54 gfrtc_fdt_match(device_t parent, cfdata_t cf, void *aux) 55 { 56 struct fdt_attach_args * const faa = aux; 57 58 return of_compatible_match(faa->faa_phandle, compat_data); 59 } 60 61 static void 62 gfrtc_fdt_attach(device_t parent, device_t self, void *aux) 63 { 64 struct gfrtc_softc * const sc = device_private(self); 65 struct fdt_attach_args * const faa = aux; 66 const int phandle = faa->faa_phandle; 67 bus_addr_t addr; 68 bus_size_t size; 69 70 if (fdtbus_get_reg(phandle, 0, &addr, &size) != 0) { 71 aprint_error(": couldn't get registers\n"); 72 return; 73 } 74 75 sc->sc_dev = self; 76 sc->sc_bst = faa->faa_bst; 77 if (bus_space_map(sc->sc_bst, addr, size, 0, &sc->sc_bsh) != 0) { 78 aprint_error(": couldn't map registers\n"); 79 return; 80 } 81 82 gfrtc_attach(sc, true); 83 } 84 85 CFATTACH_DECL_NEW(gfrtc_fdt, sizeof(struct gfrtc_softc), 86 gfrtc_fdt_match, gfrtc_fdt_attach, NULL, NULL); 87