diff options
Diffstat (limited to 'sys/dev/hdmi/dwc_hdmi_fdt.c')
| -rw-r--r-- | sys/dev/hdmi/dwc_hdmi_fdt.c | 201 |
1 files changed, 201 insertions, 0 deletions
diff --git a/sys/dev/hdmi/dwc_hdmi_fdt.c b/sys/dev/hdmi/dwc_hdmi_fdt.c new file mode 100644 index 000000000000..b1fc817af12b --- /dev/null +++ b/sys/dev/hdmi/dwc_hdmi_fdt.c @@ -0,0 +1,201 @@ +/*- + * 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/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); |