233 lines
6.5 KiB
C
233 lines
6.5 KiB
C
/* $NetBSD: imx51_iomux.c,v 1.3 2012/04/15 09:51:31 bsh Exp $ */
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/*
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* Copyright (c) 2009, 2010 Genetec Corporation. All rights reserved.
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* Written by Hashimoto Kenichi for Genetec Corporation.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY GENETEC CORPORATION ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GENETEC CORPORATION
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/*-
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* Copyright (c) 2012 The FreeBSD Foundation
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* All rights reserved.
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*
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* Portions of this software were developed by Oleksandr Rybalko
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* under sponsorship from the FreeBSD Foundation.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/bus.h>
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#include <sys/kernel.h>
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#include <sys/module.h>
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#include <sys/malloc.h>
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#include <sys/rman.h>
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#include <machine/bus.h>
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#include <machine/fdt.h>
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#include <dev/fdt/fdt_common.h>
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#include <dev/ofw/openfirm.h>
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#include <dev/ofw/ofw_bus.h>
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#include <dev/ofw/ofw_bus_subr.h>
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#include <arm/freescale/imx/imx51_iomuxvar.h>
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#include <arm/freescale/imx/imx51_iomuxreg.h>
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#define IOMUX_WRITE(_sc, _r, _v) \
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bus_write_4((_sc)->sc_res, (_r), (_v))
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#define IOMUX_READ(_sc, _r) \
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bus_read_4((_sc)->sc_res, (_r))
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#define IOMUX_SET(_sc, _r, _m) \
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IOMUX_WRITE((_sc), (_r), IOMUX_READ((_sc), (_r)) | (_m))
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#define IOMUX_CLEAR(_sc, _r, _m) \
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IOMUX_WRITE((_sc), (_r), IOMUX_READ((_sc), (_r)) & ~(_m))
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struct iomux_softc {
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struct resource *sc_res;
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device_t sc_dev;
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};
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static int iomux_probe(device_t);
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static int iomux_attach(device_t);
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static struct iomux_softc *iomuxsc = NULL;
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static struct resource_spec imx_iomux_spec[] = {
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{ SYS_RES_MEMORY, 0, RF_ACTIVE }, /* Global registers */
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{ -1, 0 }
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};
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static int
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iomux_probe(device_t dev)
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{
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if (!ofw_bus_is_compatible(dev, "fsl,imx51-iomux"))
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return (ENXIO);
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device_set_desc(dev, "Freescale i.MX51 IO pins multiplexor");
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return (BUS_PROBE_DEFAULT);
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}
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static int
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iomux_attach(device_t dev)
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{
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struct iomux_softc * sc;
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sc = device_get_softc(dev);
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if (bus_alloc_resources(dev, imx_iomux_spec, &sc->sc_res)) {
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device_printf(dev, "could not allocate resources\n");
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return (ENXIO);
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}
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iomuxsc = sc;
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/*
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* XXX: place to fetch all info about pinmuxing from loader data
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* (FDT blob) and apply. Loader (1st one) must care about
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* device-to-device difference.
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*/
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return (0);
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}
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static void
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iomux_set_function_sub(struct iomux_softc *sc, uint32_t pin, uint32_t fn)
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{
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bus_size_t mux_ctl_reg = IOMUX_PIN_TO_MUX_ADDRESS(pin);
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if (mux_ctl_reg != IOMUX_MUX_NONE)
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IOMUX_WRITE(sc, mux_ctl_reg, fn);
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}
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void
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iomux_set_function(unsigned int pin, unsigned int fn)
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{
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if (iomuxsc == NULL)
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return;
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iomux_set_function_sub(iomuxsc, pin, fn);
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}
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static void
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iomux_set_pad_sub(struct iomux_softc *sc, uint32_t pin, uint32_t config)
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{
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bus_size_t pad_ctl_reg = IOMUX_PIN_TO_PAD_ADDRESS(pin);
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if (pad_ctl_reg != IOMUX_PAD_NONE)
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IOMUX_WRITE(sc, pad_ctl_reg, config);
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}
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void
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iomux_set_pad(unsigned int pin, unsigned int config)
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{
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if (iomuxsc == NULL)
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return;
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iomux_set_pad_sub(iomuxsc, pin, config);
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}
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#ifdef notyet
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void
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iomux_set_input(unsigned int input, unsigned int config)
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{
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bus_size_t input_ctl_reg = input;
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bus_space_write_4(iomuxsc->iomux_memt, iomuxsc->iomux_memh,
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input_ctl_reg, config);
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}
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#endif
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void
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iomux_mux_config(const struct iomux_conf *conflist)
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{
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int i;
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if (iomuxsc == NULL)
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return;
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for (i = 0; conflist[i].pin != IOMUX_CONF_EOT; i++) {
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iomux_set_pad_sub(iomuxsc, conflist[i].pin, conflist[i].pad);
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iomux_set_function_sub(iomuxsc, conflist[i].pin,
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conflist[i].mux);
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}
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}
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#ifdef notyet
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void
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iomux_input_config(const struct iomux_input_conf *conflist)
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{
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int i;
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if (iomuxsc == NULL)
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return;
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for (i = 0; conflist[i].inout != -1; i++) {
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iomux_set_inout(iomuxsc, conflist[i].inout,
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conflist[i].inout_mode);
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}
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}
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#endif
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static device_method_t imx_iomux_methods[] = {
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DEVMETHOD(device_probe, iomux_probe),
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DEVMETHOD(device_attach, iomux_attach),
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DEVMETHOD_END
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};
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static driver_t imx_iomux_driver = {
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"imx_iomux",
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imx_iomux_methods,
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sizeof(struct iomux_softc),
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};
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static devclass_t imx_iomux_devclass;
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EARLY_DRIVER_MODULE(imx_iomux, simplebus, imx_iomux_driver,
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imx_iomux_devclass, 0, 0, BUS_PASS_BUS - 1);
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