/*- * SPDX-License-Identifier: BSD-2-Clause * * Copyright (c) 2014 Ruslan Bukin * 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 AUTHOR 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 AUTHOR 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. */ /* * Vybrid Family Timing Controller (TCON) * Chapter 58, Vybrid Reference Manual, Rev. 5, 07/2013 */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #define TCON0_CTRL1 0x00 #define TCON_BYPASS (1 << 29) struct tcon_softc { struct resource *res[1]; bus_space_tag_t bst; bus_space_handle_t bsh; }; struct tcon_softc *tcon_sc; static struct resource_spec tcon_spec[] = { { SYS_RES_MEMORY, 0, RF_ACTIVE }, { -1, 0 } }; uint32_t tcon_bypass(void) { if (tcon_sc == NULL) return (1); WRITE4(tcon_sc, TCON0_CTRL1, TCON_BYPASS); return (0); } static int tcon_probe(device_t dev) { if (!ofw_bus_status_okay(dev)) return (ENXIO); if (!ofw_bus_is_compatible(dev, "fsl,mvf600-tcon")) return (ENXIO); device_set_desc(dev, "Vybrid Family Timing Controller (TCON)"); return (BUS_PROBE_DEFAULT); } static int tcon_attach(device_t dev) { struct tcon_softc *sc; sc = device_get_softc(dev); if (bus_alloc_resources(dev, tcon_spec, sc->res)) { device_printf(dev, "could not allocate resources\n"); return (ENXIO); } /* Memory interface */ sc->bst = rman_get_bustag(sc->res[0]); sc->bsh = rman_get_bushandle(sc->res[0]); tcon_sc = sc; return (0); } static device_method_t tcon_methods[] = { DEVMETHOD(device_probe, tcon_probe), DEVMETHOD(device_attach, tcon_attach), { 0, 0 } }; static driver_t tcon_driver = { "tcon", tcon_methods, sizeof(struct tcon_softc), }; DRIVER_MODULE(tcon, simplebus, tcon_driver, 0, 0);