/* $NetBSD: imx6_usbphy.c,v 1.2.18.1 2023/05/28 10:14:35 martin Exp $ */ /*- * Copyright (c) 2019 Genetec Corporation. All rights reserved. * Written by Hashimoto Kenichi for Genetec Corporation. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #include __KERNEL_RCSID(1, "$NetBSD: imx6_usbphy.c,v 1.2.18.1 2023/05/28 10:14:35 martin Exp $"); #include "opt_fdt.h" #include "locators.h" #include "ohci.h" #include "ehci.h" #include #include #include #include #include struct imx6_usbphy_softc { device_t sc_dev; bus_space_tag_t sc_iot; bus_space_handle_t sc_ioh; struct clk *sc_clk; }; static int imx6_usbphy_match(device_t, cfdata_t, void *); static void imx6_usbphy_attach(device_t, device_t, void *); static int imx6_usbphy_init_clocks(device_t); static int imx6_usbphy_enable(device_t, void *, bool); CFATTACH_DECL_NEW(imxusbphy, sizeof(struct imx6_usbphy_softc), imx6_usbphy_match, imx6_usbphy_attach, NULL, NULL); static const struct device_compatible_entry compat_data[] = { { .compat = "fsl,imx6q-usbphy" }, { .compat = "fsl,imx6sx-usbphy" }, DEVICE_COMPAT_EOL }; static int imx6_usbphy_match(device_t parent, cfdata_t cf, void *aux) { struct fdt_attach_args * const faa = aux; return of_compatible_match(faa->faa_phandle, compat_data); } static void imx6_usbphy_attach(device_t parent, device_t self, void *aux) { struct imx6_usbphy_softc *sc = device_private(self); struct fdt_attach_args * const faa = aux; const int phandle = faa->faa_phandle; bus_space_tag_t bst = faa->faa_bst; bus_space_handle_t bsh; bus_addr_t addr; bus_size_t size; int error; if (fdtbus_get_reg(phandle, 0, &addr, &size) != 0) { aprint_error(": couldn't get iomux registers\n"); return; } error = bus_space_map(bst, addr, size, 0, &bsh); if (error) { aprint_error(": couldn't map %#" PRIxBUSADDR ": %d", addr, error); return; } sc->sc_clk = fdtbus_clock_get_index(phandle, 0); if (sc->sc_clk == NULL) { aprint_error(": couldn't get clock\n"); return; } sc->sc_dev = self; sc->sc_iot = bst; sc->sc_ioh = bsh; aprint_naive("\n"); aprint_normal(": USB PHY\n"); imx6_usbphy_init_clocks(self); imx6_usbphy_enable(self, NULL, true); } static int imx6_usbphy_init_clocks(device_t dev) { struct imx6_usbphy_softc * const sc = device_private(dev); int error; error = clk_enable(sc->sc_clk); if (error) { aprint_error_dev(sc->sc_dev, "couldn't enable: %d\n", error); return error; } return 0; } #define USBPHY_READ(sc, reg) \ bus_space_read_4((sc)->sc_iot, (sc)->sc_ioh, (reg)) #define USBPHY_WRITE(sc, reg, val) \ bus_space_write_4((sc)->sc_iot, (sc)->sc_ioh, (reg), (val)) static int imx6_usbphy_enable(device_t dev, void *priv, bool enable) { struct imx6_usbphy_softc * const sc = device_private(dev); /* USBPHY enable */ USBPHY_WRITE(sc, USBPHY_CTRL, USBPHY_CTRL_CLKGATE); /* do reset */ USBPHY_WRITE(sc, USBPHY_CTRL_SET, USBPHY_CTRL_SFTRST); delay(100); /* clear reset, and run clocks */ USBPHY_WRITE(sc, USBPHY_CTRL_CLR, USBPHY_CTRL_SFTRST | USBPHY_CTRL_CLKGATE); delay(100); /* power on */ USBPHY_WRITE(sc, USBPHY_PWD, 0); /* UTMI+Level2, Level3 */ USBPHY_WRITE(sc, USBPHY_CTRL_SET, USBPHY_CTRL_ENUTMILEVEL2 | USBPHY_CTRL_ENUTMILEVEL3); return 0; }