1 /* $OpenBSD: imxdwusb.c,v 1.4 2020/12/19 01:21:35 patrick Exp $ */ 2 /* 3 * Copyright (c) 2017, 2018 Mark Kettenis <kettenis@openbsd.org> 4 * Copyright (c) 2020 Patrick Wildt <patrick@blueri.se> 5 * 6 * Permission to use, copy, modify, and distribute this software for any 7 * purpose with or without fee is hereby granted, provided that the above 8 * copyright notice and this permission notice appear in all copies. 9 * 10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 17 */ 18 19 #include <sys/param.h> 20 #include <sys/systm.h> 21 #include <sys/device.h> 22 23 #include <machine/bus.h> 24 #include <machine/fdt.h> 25 26 #include <arm64/dev/simplebusvar.h> 27 28 #include <dev/ofw/openfirm.h> 29 #include <dev/ofw/ofw_clock.h> 30 #include <dev/ofw/ofw_power.h> 31 #include <dev/ofw/fdt.h> 32 33 /* 34 * This driver is based on preliminary device tree bindings and will 35 * almost certainly need changes once the official bindings land in 36 * mainline Linux. Support for these preliminary bindings will be 37 * dropped as soon as official bindings are available. 38 */ 39 40 struct imxdwusb_softc { 41 struct simplebus_softc sc_sbus; 42 }; 43 44 int imxdwusb_match(struct device *, void *, void *); 45 void imxdwusb_attach(struct device *, struct device *, void *); 46 47 struct cfattach imxdwusb_ca = { 48 sizeof(struct imxdwusb_softc), imxdwusb_match, imxdwusb_attach 49 }; 50 51 struct cfdriver imxdwusb_cd = { 52 NULL, "imxdwusb", DV_DULL 53 }; 54 55 int 56 imxdwusb_match(struct device *parent, void *match, void *aux) 57 { 58 struct fdt_attach_args *faa = aux; 59 60 return OF_is_compatible(faa->fa_node, "fsl,imx8mp-dwc3"); 61 } 62 63 void 64 imxdwusb_attach(struct device *parent, struct device *self, void *aux) 65 { 66 struct imxdwusb_softc *sc = (struct imxdwusb_softc *)self; 67 struct fdt_attach_args *faa = aux; 68 69 power_domain_enable(faa->fa_node); 70 clock_enable_all(faa->fa_node); 71 reset_deassert_all(faa->fa_node); 72 73 simplebus_attach(parent, &sc->sc_sbus.sc_dev, faa); 74 } 75