1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (c) 2019 Ruslan Bukin <[email protected]> 5 * 6 * This software was developed by SRI International and the University of 7 * Cambridge Computer Laboratory (Department of Computer Science and 8 * Technology) under DARPA contract HR0011-18-C-0016 ("ECATS"), as part of the 9 * DARPA SSITH research programme. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 */ 32 33 #include <sys/cdefs.h> 34 __FBSDID("$FreeBSD$"); 35 36 #include <sys/param.h> 37 #include <sys/systm.h> 38 #include <sys/kernel.h> 39 #include <sys/module.h> 40 41 #include <dev/fdt/simplebus.h> 42 #include <dev/fdt/fdt_common.h> 43 #include <dev/ofw/ofw_bus_subr.h> 44 45 struct firmware_softc { 46 struct simplebus_softc simplebus_sc; 47 device_t dev; 48 }; 49 50 static int 51 firmware_probe(device_t dev) 52 { 53 phandle_t node; 54 55 node = ofw_bus_get_node(dev); 56 57 /* 58 * The firmware node has no property compatible. 59 * Look for a known child. 60 */ 61 if (!fdt_depth_search_compatible(node, "intel,stratix10-svc", 0)) 62 return (ENXIO); 63 64 if (!ofw_bus_status_okay(dev)) 65 return (ENXIO); 66 67 device_set_desc(dev, "Firmware node"); 68 69 return (BUS_PROBE_DEFAULT); 70 } 71 72 static int 73 firmware_attach(device_t dev) 74 { 75 struct firmware_softc *sc; 76 phandle_t node; 77 78 sc = device_get_softc(dev); 79 sc->dev = dev; 80 81 node = ofw_bus_get_node(dev); 82 if (node == -1) 83 return (ENXIO); 84 85 simplebus_init(dev, node); 86 87 /* 88 * Allow devices to identify. 89 */ 90 bus_generic_probe(dev); 91 92 /* 93 * Now walk the OFW tree and attach top-level devices. 94 */ 95 for (node = OF_child(node); node > 0; node = OF_peer(node)) 96 simplebus_add_device(dev, node, 0, NULL, -1, NULL); 97 98 return (bus_generic_attach(dev)); 99 } 100 101 static int 102 firmware_detach(device_t dev) 103 { 104 105 return (0); 106 } 107 108 static device_method_t firmware_methods[] = { 109 DEVMETHOD(device_probe, firmware_probe), 110 DEVMETHOD(device_attach, firmware_attach), 111 DEVMETHOD(device_detach, firmware_detach), 112 DEVMETHOD_END 113 }; 114 115 DEFINE_CLASS_1(firmware, firmware_driver, firmware_methods, 116 sizeof(struct firmware_softc), simplebus_driver); 117 118 static devclass_t firmware_devclass; 119 120 EARLY_DRIVER_MODULE(firmware, simplebus, firmware_driver, firmware_devclass, 121 0, 0, BUS_PASS_INTERRUPT + BUS_PASS_ORDER_MIDDLE); 122 MODULE_VERSION(firmware, 1); 123