1/*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 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/cdefs.h> 33__FBSDID("$FreeBSD$"); 34 35#include <sys/param.h> 36#include <sys/systm.h> 37#include <sys/bus.h> 38#include <sys/rman.h> 39#include <sys/kernel.h> 40#include <sys/module.h> 41#include <sys/gpio.h> 42#include <machine/bus.h> 43 44#include <dev/fdt/simplebus.h> 45 46#include <dev/fdt/fdt_common.h> 47#include <dev/ofw/ofw_bus.h> 48#include <dev/ofw/ofw_bus_subr.h> 49#include <dev/ofw/ofw_subr.h> 50 51#include <dev/extres/clk/clk.h> 52#include <dev/extres/hwreset/hwreset.h> 53#include <dev/extres/phy/phy_usb.h> 54 55static struct ofw_compat_data compat_data[] = { 56 { "allwinner,sun50i-h6-dwc3", 1 }, 57 { NULL, 0 } 58}; 59 60struct aw_dwc3_softc { 61 struct simplebus_softc sc; 62 device_t dev; 63 clk_t clk_bus; 64 hwreset_t rst_bus; 65}; 66 67static int 68aw_dwc3_probe(device_t dev) 69{ 70 phandle_t node; 71 72 if (!ofw_bus_status_okay(dev)) 73 return (ENXIO); 74 75 if (ofw_bus_search_compatible(dev, compat_data)->ocd_data == 0) 76 return (ENXIO); 77 78 /* Binding says that we need a child node for the actual dwc3 controller */ 79 node = ofw_bus_get_node(dev); 80 if (OF_child(node) <= 0) 81 return (ENXIO); 82 83 device_set_desc(dev, "Allwinner H6 DWC3"); 84 return (BUS_PROBE_DEFAULT); 85} 86 87static int 88aw_dwc3_attach(device_t dev) 89{ 90 struct aw_dwc3_softc *sc; 91 device_t cdev; 92 phandle_t node, child; 93 int err; 94 95 sc = device_get_softc(dev); 96 sc->dev = dev; 97 node = ofw_bus_get_node(dev); 98 99 /* Enable the clocks */ 100 if (clk_get_by_ofw_name(dev, 0, "bus", &sc->clk_bus) != 0) { 101 device_printf(dev, "Cannot get bus clock\n"); 102 return (ENXIO); 103 } 104 err = clk_enable(sc->clk_bus); 105 if (err != 0) { 106 device_printf(dev, "Could not enable clock %s\n", 107 clk_get_name(sc->clk_bus)); 108 return (ENXIO); 109 } 110 111 /* Put module out of reset */ 112 if (hwreset_get_by_ofw_name(dev, node, "bus", &sc->rst_bus) == 0) { 113 if (hwreset_deassert(sc->rst_bus) != 0) { 114 device_printf(dev, "Cannot deassert reset\n"); 115 return (ENXIO); 116 } 117 } 118 119 simplebus_init(dev, node); 120 if (simplebus_fill_ranges(node, &sc->sc) < 0) { 121 device_printf(dev, "could not get ranges\n"); 122 return (ENXIO); 123 } 124 125 for (child = OF_child(node); child > 0; child = OF_peer(child)) { 126 cdev = simplebus_add_device(dev, child, 0, NULL, -1, NULL); 127 if (cdev != NULL) 128 device_probe_and_attach(cdev); 129 } 130 131 return (bus_generic_attach(dev)); 132} 133 134static device_method_t aw_dwc3_methods[] = { 135 /* Device interface */ 136 DEVMETHOD(device_probe, aw_dwc3_probe), 137 DEVMETHOD(device_attach, aw_dwc3_attach), 138 139 DEVMETHOD_END 140}; 141 142static devclass_t aw_dwc3_devclass; 143 144DEFINE_CLASS_1(aw_dwc3, aw_dwc3_driver, aw_dwc3_methods, 145 sizeof(struct aw_dwc3_softc), simplebus_driver); 146DRIVER_MODULE(aw_dwc3, simplebus, aw_dwc3_driver, aw_dwc3_devclass, 0, 0); 147