1 /* $NetBSD: qemufwcfg_fdt.c,v 1.2 2021/01/27 03:10:21 thorpej 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_fdt.c,v 1.2 2021/01/27 03:10:21 thorpej 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/fdt/fdtvar.h> 39 40 #include <dev/ic/qemufwcfgvar.h> 41 42 static int fwcfg_fdt_match(device_t, cfdata_t, void *); 43 static void fwcfg_fdt_attach(device_t, device_t, void *); 44 45 CFATTACH_DECL_NEW(qemufwcfg_fdt, sizeof(struct fwcfg_softc), 46 fwcfg_fdt_match, 47 fwcfg_fdt_attach, 48 NULL, 49 NULL 50 ); 51 52 static const struct device_compatible_entry compat_data[] = { 53 { .compat = "qemu,fw-cfg-mmio" }, 54 DEVICE_COMPAT_EOL 55 }; 56 57 58 static int 59 fwcfg_fdt_match(device_t parent, cfdata_t match, void *opaque) 60 { 61 struct fdt_attach_args * const faa = opaque; 62 63 return of_compatible_match(faa->faa_phandle, compat_data); 64 } 65 66 static void 67 fwcfg_fdt_attach(device_t parent, device_t self, void *opaque) 68 { 69 struct fwcfg_softc *sc = device_private(self); 70 struct fdt_attach_args * const faa = opaque; 71 bus_addr_t base; 72 bus_size_t size; 73 74 if (fdtbus_get_reg(faa->faa_phandle, 0, &base, &size) != 0) { 75 aprint_error_dev(self, "couldn't get registers\n"); 76 return; 77 } 78 79 sc->sc_dev = self; 80 sc->sc_bst = faa->faa_bst; 81 82 if (bus_space_map(sc->sc_bst, base, size, 0, &sc->sc_bsh) != 0) { 83 aprint_error_dev(self, "couldn't map registers\n"); 84 return; 85 } 86 87 aprint_naive("\n"); 88 aprint_normal("\n"); 89 90 fwcfg_attach(sc); 91 92 pmf_device_register(self, NULL, NULL); 93 } 94