/* $NetBSD: sun9i_a80_usbphy.c,v 1.1 2019/05/28 21:56:04 jmcneill Exp $ */ /*- * Copyright (c) 2019 Jared McNeill * All rights reserved. * * 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 NETBSD FOUNDATION, INC. AND CONTRIBUTORS * ``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 FOUNDATION OR CONTRIBUTORS * 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(0, "$NetBSD: sun9i_a80_usbphy.c,v 1.1 2019/05/28 21:56:04 jmcneill Exp $"); #include #include #include #include #include #include #include /* PMU registers */ #define PMU_CFG 0x00 #define EHCI_HS_FORCE __BIT(20) #define HSIC_CONNECT_DET __BIT(17) #define HSIC_CONNECT_INT __BIT(16) #define AHB_INCR16 __BIT(11) #define AHB_INCR8 __BIT(10) #define AHB_INCR4 __BIT(9) #define AHB_INCRX_ALIGN __BIT(8) #define HSIC __BIT(1) #define ULPI_BYPASS __BIT(0) static int sun9i_usbphy_match(device_t, cfdata_t, void *); static void sun9i_usbphy_attach(device_t, device_t, void *); static const char * compatible[] = { "allwinner,sun9i-a80-usb-phy", NULL }; struct sun9i_usbphy_softc { device_t sc_dev; bus_space_tag_t sc_bst; bus_space_handle_t sc_bsh; struct clk *sc_clk_phy; struct clk *sc_clk_hsic; struct fdtbus_reset *sc_rst; struct fdtbus_regulator *sc_supply; }; #define PHY_READ(sc, reg) \ bus_space_read_4((sc)->sc_bst, (sc)->sc_bsh, (reg)) #define PHY_WRITE(sc, reg, val) \ bus_space_write_4((sc)->sc_bst, (sc)->sc_bsh, (reg), (val)) CFATTACH_DECL_NEW(sunxi_a80_usbphy, sizeof(struct sun9i_usbphy_softc), sun9i_usbphy_match, sun9i_usbphy_attach, NULL, NULL); static void * sun9i_usbphy_acquire(device_t dev, const void *data, size_t len) { struct sun9i_usbphy_softc * const sc = device_private(dev); return sc; } static void sun9i_usbphy_release(device_t dev, void *priv) { } static int sun9i_usbphy_enable(device_t dev, void *priv, bool enable) { struct sun9i_usbphy_softc * const sc = device_private(dev); uint32_t passby_mask; uint32_t val; int error; passby_mask = ULPI_BYPASS|AHB_INCR16|AHB_INCR8|AHB_INCR4|AHB_INCRX_ALIGN; if (sc->sc_clk_hsic != NULL) passby_mask |= HSIC|EHCI_HS_FORCE|HSIC_CONNECT_DET|HSIC_CONNECT_INT; /* Enable/disable passby */ if (enable) { error = clk_enable(sc->sc_clk_phy); if (error != 0) return error; if (sc->sc_clk_hsic != NULL) { error = clk_enable(sc->sc_clk_hsic); if (error != 0) return error; } error = fdtbus_reset_deassert(sc->sc_rst); if (error != 0) return error; val = PHY_READ(sc, PMU_CFG); val |= passby_mask; PHY_WRITE(sc, PMU_CFG, val); } else { val = PHY_READ(sc, PMU_CFG); val &= ~passby_mask; PHY_WRITE(sc, PMU_CFG, val); error = fdtbus_reset_assert(sc->sc_rst); if (error != 0) return error; if (sc->sc_clk_hsic != NULL) { error = clk_disable(sc->sc_clk_hsic); if (error != 0) return error; } error = clk_disable(sc->sc_clk_phy); if (error != 0) return error; } return 0; } const struct fdtbus_phy_controller_func sun9i_usbphy_funcs = { .acquire = sun9i_usbphy_acquire, .release = sun9i_usbphy_release, .enable = sun9i_usbphy_enable, }; static int sun9i_usbphy_match(device_t parent, cfdata_t cf, void *aux) { struct fdt_attach_args * const faa = aux; return of_match_compatible(faa->faa_phandle, compatible); } static void sun9i_usbphy_attach(device_t parent, device_t self, void *aux) { struct sun9i_usbphy_softc * const sc = device_private(self); struct fdt_attach_args * const faa = aux; const int phandle = faa->faa_phandle; const char *phy_type; bus_addr_t addr; bus_size_t size; sc->sc_dev = self; sc->sc_bst = faa->faa_bst; if (fdtbus_get_reg(phandle, 0, &addr, &size) != 0) { aprint_error(": couldn't get registers\n"); return; } if (bus_space_map(sc->sc_bst, addr, size, 0, &sc->sc_bsh) != 0) { aprint_error(": couldn't map registers\n"); return; } phy_type = fdtbus_get_string(phandle, "phy_type"); if (phy_type && strcmp(phy_type, "hsic") == 0) { sc->sc_clk_phy = fdtbus_clock_get(phandle, "hsic_480M"); sc->sc_clk_hsic = fdtbus_clock_get(phandle, "hsic_12M"); sc->sc_rst = fdtbus_reset_get(phandle, "hsic"); if (sc->sc_clk_phy == NULL || sc->sc_clk_hsic == NULL || sc->sc_rst == NULL) { aprint_error(": couldn't get hsic resources\n"); return; } } else { sc->sc_clk_phy = fdtbus_clock_get(phandle, "phy"); sc->sc_rst = fdtbus_reset_get(phandle, "phy"); if (sc->sc_clk_phy == NULL || sc->sc_rst == NULL) { aprint_error(": couldn't get phy resources\n"); return; } } aprint_naive("\n"); aprint_normal(": USB PHY\n"); sc->sc_supply = fdtbus_regulator_acquire(phandle, "phy-supply"); if (sc->sc_supply != NULL) { if (fdtbus_regulator_enable(sc->sc_supply) != 0) aprint_error_dev(self, "WARNING: couldn't enable power supply\n"); } fdtbus_register_phy_controller(self, phandle, &sun9i_usbphy_funcs); }