/* $NetBSD: imx51_iomux.c,v 1.3 2012/04/15 09:51:31 bsh Exp $ */ /* * Copyright (c) 2009, 2010 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 GENETEC CORPORATION ``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 GENETEC CORPORATION * 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. */ /*- * Copyright (c) 2012, 2013 The FreeBSD Foundation * All rights reserved. * * Portions of this software were developed by Oleksandr Rybalko * under sponsorship from the FreeBSD Foundation. * * 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. */ #include __FBSDID("$FreeBSD$"); #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #define IOMUX_WRITE(_sc, _r, _v) \ bus_write_4((_sc)->sc_res, (_r), (_v)) #define IOMUX_READ(_sc, _r) \ bus_read_4((_sc)->sc_res, (_r)) #define IOMUX_SET(_sc, _r, _m) \ IOMUX_WRITE((_sc), (_r), IOMUX_READ((_sc), (_r)) | (_m)) #define IOMUX_CLEAR(_sc, _r, _m) \ IOMUX_WRITE((_sc), (_r), IOMUX_READ((_sc), (_r)) & ~(_m)) struct iomux_softc { struct resource *sc_res; device_t sc_dev; }; static int iomux_probe(device_t); static int iomux_attach(device_t); static struct iomux_softc *iomuxsc = NULL; static struct resource_spec imx_iomux_spec[] = { { SYS_RES_MEMORY, 0, RF_ACTIVE }, /* Global registers */ { -1, 0 } }; static int iomux_probe(device_t dev) { if (!ofw_bus_is_compatible(dev, "fsl,imx51-iomux")) return (ENXIO); device_set_desc(dev, "Freescale i.MX51 IO pins multiplexor"); return (BUS_PROBE_DEFAULT); } static int iomux_attach(device_t dev) { struct iomux_softc * sc; sc = device_get_softc(dev); if (bus_alloc_resources(dev, imx_iomux_spec, &sc->sc_res)) { device_printf(dev, "could not allocate resources\n"); return (ENXIO); } iomuxsc = sc; /* * XXX: place to fetch all info about pinmuxing from loader data * (FDT blob) and apply. Loader (1st one) must care about * device-to-device difference. */ return (0); } static void iomux_set_function_sub(struct iomux_softc *sc, uint32_t pin, uint32_t fn) { bus_size_t mux_ctl_reg = IOMUX_PIN_TO_MUX_ADDRESS(pin); if (mux_ctl_reg != IOMUX_MUX_NONE) IOMUX_WRITE(sc, mux_ctl_reg, fn); } void iomux_set_function(unsigned int pin, unsigned int fn) { if (iomuxsc == NULL) return; iomux_set_function_sub(iomuxsc, pin, fn); } static void iomux_set_pad_sub(struct iomux_softc *sc, uint32_t pin, uint32_t config) { bus_size_t pad_ctl_reg = IOMUX_PIN_TO_PAD_ADDRESS(pin); if (pad_ctl_reg != IOMUX_PAD_NONE) IOMUX_WRITE(sc, pad_ctl_reg, config); } void iomux_set_pad(unsigned int pin, unsigned int config) { if (iomuxsc == NULL) return; iomux_set_pad_sub(iomuxsc, pin, config); } #ifdef notyet void iomux_set_input(unsigned int input, unsigned int config) { bus_size_t input_ctl_reg = input; bus_space_write_4(iomuxsc->iomux_memt, iomuxsc->iomux_memh, input_ctl_reg, config); } #endif void iomux_mux_config(const struct iomux_conf *conflist) { int i; if (iomuxsc == NULL) return; for (i = 0; conflist[i].pin != IOMUX_CONF_EOT; i++) { iomux_set_pad_sub(iomuxsc, conflist[i].pin, conflist[i].pad); iomux_set_function_sub(iomuxsc, conflist[i].pin, conflist[i].mux); } } #ifdef notyet void iomux_input_config(const struct iomux_input_conf *conflist) { int i; if (iomuxsc == NULL) return; for (i = 0; conflist[i].inout != -1; i++) { iomux_set_inout(iomuxsc, conflist[i].inout, conflist[i].inout_mode); } } #endif static device_method_t imx_iomux_methods[] = { DEVMETHOD(device_probe, iomux_probe), DEVMETHOD(device_attach, iomux_attach), DEVMETHOD_END }; static driver_t imx_iomux_driver = { "imx_iomux", imx_iomux_methods, sizeof(struct iomux_softc), }; static devclass_t imx_iomux_devclass; EARLY_DRIVER_MODULE(imx_iomux, simplebus, imx_iomux_driver, imx_iomux_devclass, 0, 0, BUS_PASS_BUS - 1);