add35ed5b8
to check the status property in their probe routines. Simplebus used to only instantiate its children whose status="okay" but that was improper behavior, fixed in r261352. Now that it doesn't check anymore and probes all its children; the children all have to do the check because really only the children know how to properly interpret their status property strings. Right now all existing drivers only understand "okay" versus something- that's-not-okay, so they all use the new ofw_bus_status_okay() helper.
237 lines
6.6 KiB
C
237 lines
6.6 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, 2013 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_status_okay(dev))
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return (ENXIO);
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if (!ofw_bus_is_compatible(dev, "fsl,imx51-iomux") &&
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!ofw_bus_is_compatible(dev, "fsl,imx53-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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