1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2018 Emmanuel Vadot <manu@FreeBSD.org> 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 AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, 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 __FBSDID("$FreeBSD$"); 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/extres/syscon/syscon.h> 45 #include <dev/extres/syscon/syscon_generic.h> 46 47 #include "opt_soc.h" 48 49 static struct ofw_compat_data compat_data[] = { 50 #ifdef SOC_ROCKCHIP_RK3328 51 {"rockchip,rk3328-grf", 1}, 52 #endif 53 #ifdef SOC_ROCKCHIP_RK3399 54 {"rockchip,rk3399-grf", 1}, 55 {"rockchip,rk3399-pmugrf", 1}, 56 #endif 57 {NULL, 0} 58 }; 59 60 static int 61 rk_grf_probe(device_t dev) 62 { 63 64 if (!ofw_bus_status_okay(dev)) 65 return (ENXIO); 66 if (ofw_bus_search_compatible(dev, compat_data)->ocd_data == 0) 67 return (ENXIO); 68 69 device_set_desc(dev, "RockChip General Register Files"); 70 return (BUS_PROBE_DEFAULT); 71 } 72 73 static device_method_t rk_grf_methods[] = { 74 DEVMETHOD(device_probe, rk_grf_probe), 75 76 DEVMETHOD_END 77 }; 78 79 DEFINE_CLASS_1(rk_grf, rk_grf_driver, rk_grf_methods, 80 sizeof(struct syscon_generic_softc), syscon_generic_driver); 81 82 static devclass_t rk_grf_devclass; 83 EARLY_DRIVER_MODULE(rk_grf, simplebus, rk_grf_driver, rk_grf_devclass, 84 0, 0, BUS_PASS_BUS + BUS_PASS_ORDER_MIDDLE); 85 MODULE_VERSION(rk_grf, 1); 86