198 lines
5.0 KiB
C
198 lines
5.0 KiB
C
/*-
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* Copyright (c) 2015 Oleksandr Tymoshenko <gonzo@freebsd.org>
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* Copyright (c) 2016 Jared McNeill <jmcneill@invisible.ca>
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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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/*
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* HDMI core module
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/module.h>
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#include <sys/bus.h>
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#include <sys/rman.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 <dev/extres/clk/clk.h>
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#include <dev/videomode/videomode.h>
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#include <dev/videomode/edidvar.h>
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#include <dev/hdmi/dwc_hdmi.h>
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#include "crtc_if.h"
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struct dwc_hdmi_fdt_softc {
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struct dwc_hdmi_softc base;
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clk_t clk_hdmi;
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clk_t clk_ahb;
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phandle_t i2c_xref;
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};
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static struct ofw_compat_data compat_data[] = {
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{ "synopsys,dwc-hdmi", 1 },
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{ NULL, 0 }
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};
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static device_t
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dwc_hdmi_fdt_get_i2c_dev(device_t dev)
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{
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struct dwc_hdmi_fdt_softc *sc;
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sc = device_get_softc(dev);
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if (sc->i2c_xref == 0)
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return (NULL);
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return (OF_device_from_xref(sc->i2c_xref));
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}
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static int
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dwc_hdmi_fdt_detach(device_t dev)
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{
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struct dwc_hdmi_fdt_softc *sc;
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sc = device_get_softc(dev);
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if (sc->clk_ahb != NULL)
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clk_release(sc->clk_ahb);
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if (sc->clk_hdmi != NULL)
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clk_release(sc->clk_hdmi);
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if (sc->base.sc_mem_res != NULL)
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bus_release_resource(dev, SYS_RES_MEMORY,
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sc->base.sc_mem_rid, sc->base.sc_mem_res);
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return (0);
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}
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static int
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dwc_hdmi_fdt_attach(device_t dev)
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{
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struct dwc_hdmi_fdt_softc *sc;
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phandle_t node, i2c_xref;
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uint32_t freq;
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int err;
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sc = device_get_softc(dev);
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sc->base.sc_dev = dev;
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sc->base.sc_get_i2c_dev = dwc_hdmi_fdt_get_i2c_dev;
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err = 0;
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/* Allocate memory resources. */
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sc->base.sc_mem_rid = 0;
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sc->base.sc_mem_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY,
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&sc->base.sc_mem_rid, RF_ACTIVE);
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if (sc->base.sc_mem_res == NULL) {
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device_printf(dev, "Cannot allocate memory resources\n");
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err = ENXIO;
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goto out;
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}
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node = ofw_bus_get_node(dev);
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if (OF_getencprop(node, "ddc", &i2c_xref, sizeof(i2c_xref)) == -1)
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sc->i2c_xref = 0;
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else
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sc->i2c_xref = i2c_xref;
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if (OF_getencprop(node, "reg-shift", &sc->base.sc_reg_shift,
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sizeof(sc->base.sc_reg_shift)) <= 0)
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sc->base.sc_reg_shift = 0;
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if (clk_get_by_ofw_name(dev, 0, "hdmi", &sc->clk_hdmi) != 0 ||
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clk_get_by_ofw_name(dev, 0, "ahb", &sc->clk_ahb) != 0) {
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device_printf(dev, "Cannot get clocks\n");
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err = ENXIO;
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goto out;
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}
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if (OF_getencprop(node, "clock-frequency", &freq, sizeof(freq)) > 0) {
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err = clk_set_freq(sc->clk_hdmi, freq, CLK_SET_ROUND_DOWN);
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if (err != 0) {
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device_printf(dev,
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"Cannot set HDMI clock frequency to %u Hz\n", freq);
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goto out;
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}
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} else
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device_printf(dev, "HDMI clock frequency not specified\n");
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if (clk_enable(sc->clk_hdmi) != 0) {
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device_printf(dev, "Cannot enable HDMI clock\n");
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err = ENXIO;
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goto out;
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}
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if (clk_enable(sc->clk_ahb) != 0) {
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device_printf(dev, "Cannot enable AHB clock\n");
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err = ENXIO;
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goto out;
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}
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return (dwc_hdmi_init(dev));
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out:
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dwc_hdmi_fdt_detach(dev);
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return (err);
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}
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static int
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dwc_hdmi_fdt_probe(device_t dev)
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{
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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, "Synopsys DesignWare HDMI Controller");
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return (BUS_PROBE_DEFAULT);
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}
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static device_method_t dwc_hdmi_fdt_methods[] = {
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/* Device interface */
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DEVMETHOD(device_probe, dwc_hdmi_fdt_probe),
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DEVMETHOD(device_attach, dwc_hdmi_fdt_attach),
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DEVMETHOD(device_detach, dwc_hdmi_fdt_detach),
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/* HDMI methods */
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DEVMETHOD(hdmi_get_edid, dwc_hdmi_get_edid),
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DEVMETHOD(hdmi_set_videomode, dwc_hdmi_set_videomode),
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DEVMETHOD_END
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};
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static driver_t dwc_hdmi_fdt_driver = {
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"dwc_hdmi",
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dwc_hdmi_fdt_methods,
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sizeof(struct dwc_hdmi_fdt_softc)
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};
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DRIVER_MODULE(dwc_hdmi_fdt, simplebus, dwc_hdmi_fdt_driver, 0, 0);
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