1 /*- 2 * Copyright (c) 2019 Emmanuel Vadot <manu@FreeBSD.org> 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 14 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 15 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 16 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 17 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 18 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 19 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 20 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 21 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 22 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 23 * SUCH DAMAGE. 24 * 25 * $FreeBSD$ 26 */ 27 28 #include <sys/cdefs.h> 29 __FBSDID("$FreeBSD$"); 30 31 #include <sys/param.h> 32 #include <sys/systm.h> 33 #include <sys/bus.h> 34 #include <sys/fbio.h> 35 #include <sys/kernel.h> 36 #include <sys/module.h> 37 #include <sys/rman.h> 38 #include <sys/resource.h> 39 #include <machine/bus.h> 40 #include <vm/vm.h> 41 #include <vm/vm_extern.h> 42 #include <vm/vm_kern.h> 43 #include <vm/pmap.h> 44 45 #include <dev/fdt/simplebus.h> 46 47 #include <dev/ofw/ofw_bus.h> 48 #include <dev/ofw/ofw_bus_subr.h> 49 50 static struct ofw_compat_data compat_data[] = { 51 { "ti,sysc", 1 }, 52 { NULL, 0 } 53 }; 54 55 struct ti_sysc_softc { 56 struct simplebus_softc sc; 57 device_t dev; 58 }; 59 60 static int ti_sysc_probe(device_t dev); 61 static int ti_sysc_attach(device_t dev); 62 static int ti_sysc_detach(device_t dev); 63 64 static int 65 ti_sysc_probe(device_t dev) 66 { 67 if (!ofw_bus_status_okay(dev)) 68 return (ENXIO); 69 70 if (ofw_bus_search_compatible(dev, compat_data)->ocd_data == 0) 71 return (ENXIO); 72 73 device_set_desc(dev, "TI SYSC Interconnect"); 74 if (!bootverbose) 75 device_quiet(dev); 76 77 return (BUS_PROBE_DEFAULT); 78 } 79 80 static int 81 ti_sysc_attach(device_t dev) 82 { 83 struct ti_sysc_softc *sc; 84 device_t cdev; 85 phandle_t node, child; 86 87 sc = device_get_softc(dev); 88 sc->dev = dev; 89 node = ofw_bus_get_node(dev); 90 91 simplebus_init(dev, node); 92 if (simplebus_fill_ranges(node, &sc->sc) < 0) { 93 device_printf(dev, "could not get ranges\n"); 94 return (ENXIO); 95 } 96 97 for (child = OF_child(node); child > 0; child = OF_peer(child)) { 98 cdev = simplebus_add_device(dev, child, 0, NULL, -1, NULL); 99 if (cdev != NULL) 100 device_probe_and_attach(cdev); 101 } 102 103 return (bus_generic_attach(dev)); 104 } 105 106 static int 107 ti_sysc_detach(device_t dev) 108 { 109 110 return (EBUSY); 111 } 112 113 static device_method_t ti_sysc_methods[] = { 114 /* Device interface */ 115 DEVMETHOD(device_probe, ti_sysc_probe), 116 DEVMETHOD(device_attach, ti_sysc_attach), 117 DEVMETHOD(device_detach, ti_sysc_detach), 118 119 DEVMETHOD_END 120 }; 121 122 DEFINE_CLASS_1(ti_sysc, ti_sysc_driver, ti_sysc_methods, 123 sizeof(struct ti_sysc_softc), simplebus_driver); 124 125 static devclass_t ti_sysc_devclass; 126 127 EARLY_DRIVER_MODULE(ti_sysc, simplebus, ti_sysc_driver, 128 ti_sysc_devclass, 0, 0, BUS_PASS_BUS + BUS_PASS_ORDER_FIRST); 129