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