freebsd-dev/sys/mips/mediatek/mtk_sysctl.c

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/*-
* Copyright (c) 2016 Stanislav Galabov.
* 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.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/bus.h>
#include <sys/interrupt.h>
#include <sys/kernel.h>
#include <sys/module.h>
#include <sys/lock.h>
#include <sys/mutex.h>
#include <sys/rman.h>
#include <sys/malloc.h>
#include <machine/fdt.h>
#include <dev/ofw/openfirm.h>
#include <dev/ofw/ofw_bus.h>
#include <dev/ofw/ofw_bus_subr.h>
#include <mips/mediatek/mtk_sysctl.h>
#include <dev/fdt/fdt_common.h>
struct mtk_sysctl_softc {
device_t dev;
struct resource *mem_res;
int mem_rid;
struct mtx mtx;
};
static struct mtk_sysctl_softc *mtk_sysctl_sc = NULL;
static struct ofw_compat_data compat_data[] = {
{ "ralink,rt2880-sysc", 1 },
{ "ralink,rt3050-sysc", 1 },
{ "ralink,rt3352-sysc", 1 },
{ "ralink,rt3883-sysc", 1 },
{ "ralink,rt5350-sysc", 1 },
{ "ralink,mt7620a-sysc", 1 },
{ "mtk,mt7621-sysc", 1 },
/* Sentinel */
{ NULL, 0 }
};
#define MTK_SYSCTL_LOCK(sc) mtx_lock_spin(&(sc)->mtx)
#define MTK_SYSCTL_UNLOCK(sc) mtx_unlock_spin(&(sc)->mtx)
#define MTK_SYSCTL_LOCK_INIT(sc) \
mtx_init(&(sc)->mtx, device_get_nameunit((sc)->dev), \
"mtk_sysctl", MTX_SPIN)
#define MTK_SYSCTL_LOCK_DESTROY(sc) mtx_destroy(&(sc)->mtx)
static int
mtk_sysctl_probe(device_t dev)
{
if (!ofw_bus_status_okay(dev))
return (ENXIO);
if (ofw_bus_search_compatible(dev, compat_data)->ocd_data == 0)
return (ENXIO);
device_set_desc(dev, "MTK System Controller");
return (BUS_PROBE_DEFAULT);
}
static int mtk_sysctl_detach(device_t);
static int
mtk_sysctl_attach(device_t dev)
{
struct mtk_sysctl_softc *sc = device_get_softc(dev);
if (device_get_unit(dev) != 0 || mtk_sysctl_sc != NULL) {
device_printf(dev, "Only one sysctl module supported\n");
return (ENXIO);
}
mtk_sysctl_sc = sc;
/* Map control/status registers. */
sc->mem_rid = 0;
sc->mem_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY,
&sc->mem_rid, RF_ACTIVE);
if (sc->mem_res == NULL) {
device_printf(dev, "couldn't map memory\n");
mtk_sysctl_detach(dev);
return (ENXIO);
}
sc->dev = dev;
MTK_SYSCTL_LOCK_INIT(sc);
return (0);
}
static int
mtk_sysctl_detach(device_t dev)
{
struct mtk_sysctl_softc *sc = device_get_softc(dev);
if (sc->mem_res)
bus_release_resource(dev, SYS_RES_MEMORY, sc->mem_rid,
sc->mem_res);
MTK_SYSCTL_LOCK_DESTROY(sc);
return(0);
}
uint32_t
mtk_sysctl_get(uint32_t reg)
{
uint32_t val;
MTK_SYSCTL_LOCK(mtk_sysctl_sc);
val = bus_read_4(mtk_sysctl_sc->mem_res, reg);
MTK_SYSCTL_UNLOCK(mtk_sysctl_sc);
return (val);
}
void
mtk_sysctl_set(uint32_t reg, uint32_t val)
{
MTK_SYSCTL_LOCK(mtk_sysctl_sc);
bus_write_4(mtk_sysctl_sc->mem_res, reg, val);
MTK_SYSCTL_UNLOCK(mtk_sysctl_sc);
}
void
mtk_sysctl_clr_set(uint32_t reg, uint32_t clr, uint32_t set)
{
uint32_t val;
MTK_SYSCTL_LOCK(mtk_sysctl_sc);
val = bus_read_4(mtk_sysctl_sc->mem_res, reg);
val &= ~(clr);
val |= set;
bus_write_4(mtk_sysctl_sc->mem_res, reg, val);
MTK_SYSCTL_UNLOCK(mtk_sysctl_sc);
}
static device_method_t mtk_sysctl_methods[] = {
DEVMETHOD(device_probe, mtk_sysctl_probe),
DEVMETHOD(device_attach, mtk_sysctl_attach),
DEVMETHOD(device_detach, mtk_sysctl_detach),
DEVMETHOD_END
};
static driver_t mtk_sysctl_driver = {
"sysc",
mtk_sysctl_methods,
sizeof(struct mtk_sysctl_softc),
};
static devclass_t mtk_sysctl_devclass;
EARLY_DRIVER_MODULE(mtk_sysctl, simplebus, mtk_sysctl_driver,
mtk_sysctl_devclass, 0, 0, BUS_PASS_INTERRUPT + BUS_PASS_ORDER_EARLY);