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/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (c) 2014 Ruslan Bukin <br@bsdpad.com>
* 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 Timing Controller (TCON)
* Chapter 58, Vybrid Reference Manual, Rev. 5, 07/2013
*/
#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 <sys/timeet.h>
#include <sys/timetc.h>
#include <sys/watchdog.h>
#include <dev/ofw/openfirm.h>
#include <dev/ofw/ofw_bus.h>
#include <dev/ofw/ofw_bus_subr.h>
#include <machine/bus.h>
#include <machine/cpu.h>
#include <machine/intr.h>
#include <arm/freescale/vybrid/vf_common.h>
#define TCON0_CTRL1 0x00
#define TCON_BYPASS (1 << 29)
struct tcon_softc {
struct resource *res[1];
bus_space_tag_t bst;
bus_space_handle_t bsh;
};
struct tcon_softc *tcon_sc;
static struct resource_spec tcon_spec[] = {
{ SYS_RES_MEMORY, 0, RF_ACTIVE },
{ -1, 0 }
};
uint32_t
tcon_bypass(void)
{
struct tcon_softc *sc;
if (tcon_sc == NULL)
return (1);
sc = tcon_sc;
WRITE4(tcon_sc, TCON0_CTRL1, TCON_BYPASS);
return (0);
}
static int
tcon_probe(device_t dev)
{
if (!ofw_bus_status_okay(dev))
return (ENXIO);
if (!ofw_bus_is_compatible(dev, "fsl,mvf600-tcon"))
return (ENXIO);
device_set_desc(dev, "Vybrid Family Timing Controller (TCON)");
return (BUS_PROBE_DEFAULT);
}
static int
tcon_attach(device_t dev)
{
struct tcon_softc *sc;
sc = device_get_softc(dev);
if (bus_alloc_resources(dev, tcon_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]);
tcon_sc = sc;
return (0);
}
static device_method_t tcon_methods[] = {
DEVMETHOD(device_probe, tcon_probe),
DEVMETHOD(device_attach, tcon_attach),
{ 0, 0 }
};
static driver_t tcon_driver = {
"tcon",
tcon_methods,
sizeof(struct tcon_softc),
};
static devclass_t tcon_devclass;
DRIVER_MODULE(tcon, simplebus, tcon_driver, tcon_devclass, 0, 0);
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