1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (c) 2019 Emmanuel Vadot <manu@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 * Rockchip DWC3 glue 30 */ 31 32 #include <sys/param.h> 33 #include <sys/systm.h> 34 #include <sys/bus.h> 35 #include <sys/rman.h> 36 #include <sys/kernel.h> 37 #include <sys/module.h> 38 #include <sys/gpio.h> 39 #include <machine/bus.h> 40 41 #include <dev/fdt/simplebus.h> 42 43 #include <dev/fdt/fdt_common.h> 44 #include <dev/ofw/ofw_bus.h> 45 #include <dev/ofw/ofw_bus_subr.h> 46 #include <dev/ofw/ofw_subr.h> 47 48 #include <dev/clk/clk.h> 49 #include <dev/hwreset/hwreset.h> 50 #include <dev/phy/phy_usb.h> 51 52 static struct ofw_compat_data compat_data[] = { 53 { "allwinner,sun50i-h6-dwc3", 1 }, 54 { NULL, 0 } 55 }; 56 57 struct aw_dwc3_softc { 58 struct simplebus_softc sc; 59 device_t dev; 60 clk_t clk_bus; 61 hwreset_t rst_bus; 62 }; 63 64 static int 65 aw_dwc3_probe(device_t dev) 66 { 67 phandle_t node; 68 69 if (!ofw_bus_status_okay(dev)) 70 return (ENXIO); 71 72 if (ofw_bus_search_compatible(dev, compat_data)->ocd_data == 0) 73 return (ENXIO); 74 75 /* Binding says that we need a child node for the actual dwc3 controller */ 76 node = ofw_bus_get_node(dev); 77 if (OF_child(node) <= 0) 78 return (ENXIO); 79 80 device_set_desc(dev, "Allwinner H6 DWC3"); 81 return (BUS_PROBE_DEFAULT); 82 } 83 84 static int 85 aw_dwc3_attach(device_t dev) 86 { 87 struct aw_dwc3_softc *sc; 88 device_t cdev; 89 phandle_t node, child; 90 int err; 91 92 sc = device_get_softc(dev); 93 sc->dev = dev; 94 node = ofw_bus_get_node(dev); 95 96 /* Enable the clocks */ 97 if (clk_get_by_ofw_name(dev, 0, "bus", &sc->clk_bus) != 0) { 98 device_printf(dev, "Cannot get bus clock\n"); 99 return (ENXIO); 100 } 101 err = clk_enable(sc->clk_bus); 102 if (err != 0) { 103 device_printf(dev, "Could not enable clock %s\n", 104 clk_get_name(sc->clk_bus)); 105 return (ENXIO); 106 } 107 108 /* Put module out of reset */ 109 if (hwreset_get_by_ofw_name(dev, node, "bus", &sc->rst_bus) == 0) { 110 if (hwreset_deassert(sc->rst_bus) != 0) { 111 device_printf(dev, "Cannot deassert reset\n"); 112 return (ENXIO); 113 } 114 } 115 116 simplebus_init(dev, node); 117 if (simplebus_fill_ranges(node, &sc->sc) < 0) { 118 device_printf(dev, "could not get ranges\n"); 119 return (ENXIO); 120 } 121 122 for (child = OF_child(node); child > 0; child = OF_peer(child)) { 123 cdev = simplebus_add_device(dev, child, 0, NULL, -1, NULL); 124 if (cdev != NULL) 125 device_probe_and_attach(cdev); 126 } 127 128 return (bus_generic_attach(dev)); 129 } 130 131 static device_method_t aw_dwc3_methods[] = { 132 /* Device interface */ 133 DEVMETHOD(device_probe, aw_dwc3_probe), 134 DEVMETHOD(device_attach, aw_dwc3_attach), 135 136 DEVMETHOD_END 137 }; 138 139 DEFINE_CLASS_1(aw_dwc3, aw_dwc3_driver, aw_dwc3_methods, 140 sizeof(struct aw_dwc3_softc), simplebus_driver); 141 DRIVER_MODULE(aw_dwc3, simplebus, aw_dwc3_driver, 0, 0); 142