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 device_t dev; 59 clk_t clk_bus; 60 hwreset_t rst_bus; 61 }; 62 63 static int 64 aw_dwc3_probe(device_t dev) 65 { 66 phandle_t node; 67 68 if (!ofw_bus_status_okay(dev)) 69 return (ENXIO); 70 71 if (ofw_bus_search_compatible(dev, compat_data)->ocd_data == 0) 72 return (ENXIO); 73 74 /* Binding says that we need a child node for the actual dwc3 controller */ 75 node = ofw_bus_get_node(dev); 76 if (OF_child(node) <= 0) 77 return (ENXIO); 78 79 device_set_desc(dev, "Allwinner H6 DWC3"); 80 return (BUS_PROBE_DEFAULT); 81 } 82 83 static int 84 aw_dwc3_attach(device_t dev) 85 { 86 struct aw_dwc3_softc *sc; 87 phandle_t node; 88 int err; 89 90 sc = device_get_softc(dev); 91 sc->dev = dev; 92 node = ofw_bus_get_node(dev); 93 94 /* Enable the clocks */ 95 if (clk_get_by_ofw_name(dev, 0, "bus", &sc->clk_bus) != 0) { 96 device_printf(dev, "Cannot get bus clock\n"); 97 return (ENXIO); 98 } 99 err = clk_enable(sc->clk_bus); 100 if (err != 0) { 101 device_printf(dev, "Could not enable clock %s\n", 102 clk_get_name(sc->clk_bus)); 103 return (ENXIO); 104 } 105 106 /* Put module out of reset */ 107 if (hwreset_get_by_ofw_name(dev, node, "bus", &sc->rst_bus) == 0) { 108 if (hwreset_deassert(sc->rst_bus) != 0) { 109 device_printf(dev, "Cannot deassert reset\n"); 110 return (ENXIO); 111 } 112 } 113 114 err = simplebus_attach_impl(dev, 0, node); 115 if (err != 0) 116 return (err); 117 118 bus_attach_children(dev); 119 return (0); 120 } 121 122 static device_method_t aw_dwc3_methods[] = { 123 /* Device interface */ 124 DEVMETHOD(device_probe, aw_dwc3_probe), 125 DEVMETHOD(device_attach, aw_dwc3_attach), 126 127 DEVMETHOD_END 128 }; 129 130 DEFINE_CLASS_1(aw_dwc3, aw_dwc3_driver, aw_dwc3_methods, 131 sizeof(struct aw_dwc3_softc), simplebus_driver); 132 DRIVER_MODULE(aw_dwc3, simplebus, aw_dwc3_driver, 0, 0); 133