530031a8f1
There are many drivers missing, but we can reach single user mode now. Hardware graciously donated by Douglas Beattie.
234 lines
6.5 KiB
C
234 lines
6.5 KiB
C
/* $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 <sys/cdefs.h>
|
|
__FBSDID("$FreeBSD$");
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/bus.h>
|
|
#include <sys/kernel.h>
|
|
#include <sys/module.h>
|
|
#include <sys/malloc.h>
|
|
#include <sys/rman.h>
|
|
|
|
#include <machine/bus.h>
|
|
#include <machine/fdt.h>
|
|
|
|
#include <dev/fdt/fdt_common.h>
|
|
#include <dev/ofw/openfirm.h>
|
|
#include <dev/ofw/ofw_bus.h>
|
|
#include <dev/ofw/ofw_bus_subr.h>
|
|
|
|
#include <arm/freescale/imx/imx51_iomuxvar.h>
|
|
#include <arm/freescale/imx/imx51_iomuxreg.h>
|
|
|
|
|
|
#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") &&
|
|
!ofw_bus_is_compatible(dev, "fsl,imx53-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);
|
|
|