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