af3dc4a7ca
Mainly focus on files that use BSD 2-Clause license, however the tool I was using misidentified many licenses so this was mostly a manual - error prone - task. The Software Package Data Exchange (SPDX) group provides a specification to make it easier for automated tools to detect and summarize well known opensource licenses. We are gradually adopting the specification, noting that the tags are considered only advisory and do not, in any way, superceed or replace the license texts.
156 lines
4.1 KiB
C
156 lines
4.1 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright (c) 2014 Ruslan Bukin <br@bsdpad.com>
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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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/*
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* Vybrid Family Direct Memory Access Multiplexer (DMAMUX)
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* Chapter 22, Vybrid Reference Manual, Rev. 5, 07/2013
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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/kernel.h>
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#include <sys/module.h>
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#include <sys/malloc.h>
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#include <sys/rman.h>
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#include <sys/timeet.h>
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#include <sys/timetc.h>
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#include <sys/watchdog.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 <machine/bus.h>
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#include <machine/cpu.h>
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#include <machine/intr.h>
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#include <arm/freescale/vybrid/vf_common.h>
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#include <arm/freescale/vybrid/vf_dmamux.h>
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#define DMAMUX_CHCFG(n) (0x1 * n) /* Channels 0-15 Cfg Reg */
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#define CHCFG_ENBL (1 << 7) /* Channel Enable */
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#define CHCFG_TRIG (1 << 6) /* Channel Trigger Enable */
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#define CHCFG_SOURCE_MASK 0x3f /* Channel Source (Slot) */
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#define CHCFG_SOURCE_SHIFT 0
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struct dmamux_softc {
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struct resource *res[4];
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bus_space_tag_t bst[4];
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bus_space_handle_t bsh[4];
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};
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struct dmamux_softc *dmamux_sc;
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static struct resource_spec dmamux_spec[] = {
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{ SYS_RES_MEMORY, 0, RF_ACTIVE }, /* DMAMUX0 */
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{ SYS_RES_MEMORY, 1, RF_ACTIVE }, /* DMAMUX1 */
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{ SYS_RES_MEMORY, 2, RF_ACTIVE }, /* DMAMUX2 */
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{ SYS_RES_MEMORY, 3, RF_ACTIVE }, /* DMAMUX3 */
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{ -1, 0 }
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};
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static int
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dmamux_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_is_compatible(dev, "fsl,mvf600-dmamux"))
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return (ENXIO);
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device_set_desc(dev, "Vybrid Family Direct Memory Access Multiplexer");
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return (BUS_PROBE_DEFAULT);
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}
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int
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dmamux_configure(int mux, int source, int channel, int enable)
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{
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struct dmamux_softc *sc;
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int reg;
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sc = dmamux_sc;
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MUX_WRITE1(sc, mux, DMAMUX_CHCFG(channel), 0x0);
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reg = 0;
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if (enable)
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reg |= (CHCFG_ENBL);
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reg &= ~(CHCFG_SOURCE_MASK << CHCFG_SOURCE_SHIFT);
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reg |= (source << CHCFG_SOURCE_SHIFT);
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MUX_WRITE1(sc, mux, DMAMUX_CHCFG(channel), reg);
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return (0);
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}
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static int
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dmamux_attach(device_t dev)
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{
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struct dmamux_softc *sc;
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int i;
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sc = device_get_softc(dev);
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if (bus_alloc_resources(dev, dmamux_spec, sc->res)) {
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device_printf(dev, "could not allocate resources\n");
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return (ENXIO);
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}
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/* Memory interface */
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for (i = 0; i < 4; i++) {
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sc->bst[i] = rman_get_bustag(sc->res[i]);
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sc->bsh[i] = rman_get_bushandle(sc->res[i]);
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}
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dmamux_sc = sc;
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return (0);
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}
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static device_method_t dmamux_methods[] = {
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DEVMETHOD(device_probe, dmamux_probe),
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DEVMETHOD(device_attach, dmamux_attach),
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{ 0, 0 }
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};
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static driver_t dmamux_driver = {
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"dmamux",
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dmamux_methods,
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sizeof(struct dmamux_softc),
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};
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static devclass_t dmamux_devclass;
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DRIVER_MODULE(dmamux, simplebus, dmamux_driver, dmamux_devclass, 0, 0);
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