/*- * SPDX-License-Identifier: BSD-2-Clause * * Copyright (c) 2013 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 System Reset Controller (SRC) * Chapter 18, 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 #include #define SRC_SCR 0x00 /* SRC Control Register */ #define SRC_SBMR1 0x04 /* SRC Boot Mode Register 1 */ #define SRC_SRSR 0x08 /* SRC Status Register */ #define SRC_SECR 0x0C /* SRC_SECR */ #define SRC_SICR 0x14 /* SRC Reset Interrupt Configuration Register */ #define SRC_SIMR 0x18 /* SRC Interrupt Masking Register */ #define SRC_SBMR2 0x1C /* SRC Boot Mode Register 2 */ #define SRC_GPR0 0x20 /* General Purpose Register */ #define SRC_GPR1 0x24 /* General Purpose Register */ #define SRC_GPR2 0x28 /* General Purpose Register */ #define SRC_GPR3 0x2C /* General Purpose Register */ #define SRC_GPR4 0x30 /* General Purpose Register */ #define SRC_MISC0 0x4C /* MISC0 */ #define SRC_MISC1 0x50 /* MISC1 */ #define SRC_MISC2 0x54 /* MISC2 */ #define SRC_MISC3 0x58 /* MISC3 */ struct src_softc { struct resource *res[1]; bus_space_tag_t bst; bus_space_handle_t bsh; }; struct src_softc *src_sc; static struct resource_spec src_spec[] = { { SYS_RES_MEMORY, 0, RF_ACTIVE }, { -1, 0 } }; int src_swreset(void) { if (src_sc == NULL) return (1); WRITE4(src_sc, SRC_SCR, SW_RST); return (0); } static int src_probe(device_t dev) { if (!ofw_bus_status_okay(dev)) return (ENXIO); if (!ofw_bus_is_compatible(dev, "fsl,mvf600-src")) return (ENXIO); device_set_desc(dev, "Vybrid Family System Reset Controller"); return (BUS_PROBE_DEFAULT); } static int src_attach(device_t dev) { struct src_softc *sc; sc = device_get_softc(dev); if (bus_alloc_resources(dev, src_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]); src_sc = sc; return (0); } static device_method_t src_methods[] = { DEVMETHOD(device_probe, src_probe), DEVMETHOD(device_attach, src_attach), { 0, 0 } }; static driver_t src_driver = { "src", src_methods, sizeof(struct src_softc), }; static devclass_t src_devclass; DRIVER_MODULE(src, simplebus, src_driver, src_devclass, 0, 0);