1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (c) 2018 Kyle Evans <kevans@FreeBSD.org> 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 */ 27 28 /* 29 * Allwinner syscon driver 30 */ 31 32 #include <sys/param.h> 33 #include <sys/bus.h> 34 #include <sys/kernel.h> 35 #include <sys/module.h> 36 #include <sys/mutex.h> 37 #include <sys/rman.h> 38 #include <machine/bus.h> 39 40 #include <dev/ofw/openfirm.h> 41 #include <dev/ofw/ofw_bus.h> 42 #include <dev/ofw/ofw_bus_subr.h> 43 44 #include <dev/syscon/syscon.h> 45 #include <dev/syscon/syscon_generic.h> 46 47 static struct ofw_compat_data compat_data[] = { 48 {"allwinner,sun50i-a64-system-controller", 1}, 49 {"allwinner,sun50i-a64-system-control", 1}, 50 {"allwinner,sun8i-a83t-system-controller", 1}, 51 {"allwinner,sun8i-h3-system-controller", 1}, 52 {"allwinner,sun8i-h3-system-control", 1}, 53 {"allwinner,sun50i-h5-system-control", 1}, 54 {NULL, 0} 55 }; 56 57 static int 58 aw_syscon_probe(device_t dev) 59 { 60 61 if (!ofw_bus_status_okay(dev)) 62 return (ENXIO); 63 if (ofw_bus_search_compatible(dev, compat_data)->ocd_data == 0) 64 return (ENXIO); 65 66 device_set_desc(dev, "Allwinner syscon"); 67 return (BUS_PROBE_DEFAULT); 68 } 69 70 static device_method_t aw_syscon_methods[] = { 71 DEVMETHOD(device_probe, aw_syscon_probe), 72 73 DEVMETHOD_END 74 }; 75 76 DEFINE_CLASS_1(aw_syscon, aw_syscon_driver, aw_syscon_methods, 77 sizeof(struct syscon_generic_softc), syscon_generic_driver); 78 79 /* aw_syscon needs to attach prior to if_awg */ 80 EARLY_DRIVER_MODULE(aw_syscon, simplebus, aw_syscon_driver, 0, 0, 81 BUS_PASS_SCHEDULER + BUS_PASS_ORDER_LAST); 82 MODULE_VERSION(aw_syscon, 1); 83