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/*-
* 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.
*/
/*
* Exynos 5 Power Management Unit (PMU)
*/
#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/fdt/fdt_common.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/fdt.h>
#include <machine/cpu.h>
#include <machine/intr.h>
#include <arm/samsung/exynos/exynos5_common.h>
#include <arm/samsung/exynos/exynos5_pmu.h>
#define EXYNOS5250 1
#define EXYNOS5420 2
/* PWR control */
#define EXYNOS5_PWR_USBHOST_PHY 0x708
#define EXYNOS5_USBDRD_PHY_CTRL 0x704
#define EXYNOS5420_USBDRD1_PHY_CTRL 0x708
#define PHY_POWER_ON 1
#define PHY_POWER_OFF 0
struct pmu_softc {
struct resource *res[1];
bus_space_tag_t bst;
bus_space_handle_t bsh;
device_t dev;
int model;
};
struct pmu_softc *pmu_sc;
static struct ofw_compat_data compat_data[] = {
{"samsung,exynos5420-pmu", EXYNOS5420},
{"samsung,exynos5250-pmu", EXYNOS5250},
{NULL, 0}
};
static struct resource_spec pmu_spec[] = {
{ SYS_RES_MEMORY, 0, RF_ACTIVE },
{ -1, 0 }
};
static int
pmu_probe(device_t dev)
{
if (!ofw_bus_status_okay(dev))
return (ENXIO);
if (ofw_bus_search_compatible(dev, compat_data)->ocd_data != 0) {
device_set_desc(dev, "Samsung Exynos 5 Power Management Unit");
return (BUS_PROBE_DEFAULT);
}
return (ENXIO);
}
int
usb2_phy_power_on(void)
{
struct pmu_softc *sc;
sc = pmu_sc;
if (sc == NULL)
return (-1);
/* EHCI */
WRITE4(sc, EXYNOS5_PWR_USBHOST_PHY, PHY_POWER_ON);
return (0);
}
int
usbdrd_phy_power_on(void)
{
struct pmu_softc *sc;
sc = pmu_sc;
if (sc == NULL)
return (-1);
/*
* First XHCI controller (left-side USB port on chromebook2)
*/
WRITE4(sc, EXYNOS5_USBDRD_PHY_CTRL, PHY_POWER_ON);
/*
* Second XHCI controller (right-side USB port on chrombook2)
* Only available on 5420.
*/
if (sc->model == EXYNOS5420)
WRITE4(sc, EXYNOS5420_USBDRD1_PHY_CTRL, PHY_POWER_ON);
return (0);
}
static int
pmu_attach(device_t dev)
{
struct pmu_softc *sc;
sc = device_get_softc(dev);
sc->dev = dev;
sc->model = ofw_bus_search_compatible(dev, compat_data)->ocd_data;
if (bus_alloc_resources(dev, pmu_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]);
pmu_sc = sc;
return (0);
}
static device_method_t pmu_methods[] = {
DEVMETHOD(device_probe, pmu_probe),
DEVMETHOD(device_attach, pmu_attach),
{ 0, 0 }
};
static driver_t pmu_driver = {
"pmu",
pmu_methods,
sizeof(struct pmu_softc),
};
static devclass_t pmu_devclass;
DRIVER_MODULE(pmu, simplebus, pmu_driver, pmu_devclass, 0, 0);
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