diff options
Diffstat (limited to 'sys/arm/freescale/imx/imx6_hdmi.c')
| -rw-r--r-- | sys/arm/freescale/imx/imx6_hdmi.c | 214 |
1 files changed, 214 insertions, 0 deletions
diff --git a/sys/arm/freescale/imx/imx6_hdmi.c b/sys/arm/freescale/imx/imx6_hdmi.c new file mode 100644 index 000000000000..6a316fd1cbc3 --- /dev/null +++ b/sys/arm/freescale/imx/imx6_hdmi.c @@ -0,0 +1,214 @@ +/*- + * Copyright (c) 2015 Oleksandr Tymoshenko <gonzo@freebsd.org> + * 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> +/* + * HDMI core module + */ + +#include <sys/param.h> +#include <sys/systm.h> +#include <sys/eventhandler.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/videomode/videomode.h> +#include <dev/videomode/edidvar.h> + +#include <arm/freescale/imx/imx_ccmvar.h> +#include <arm/freescale/imx/imx_iomuxvar.h> +#include <arm/freescale/imx/imx_iomuxreg.h> + +#include <dev/hdmi/dwc_hdmi.h> + +#include "crtc_if.h" + +struct imx_hdmi_softc { + struct dwc_hdmi_softc base; + phandle_t i2c_xref; + eventhandler_tag eh_tag; +}; + +static struct ofw_compat_data compat_data[] = { + {"fsl,imx6dl-hdmi", 1}, + {"fsl,imx6q-hdmi", 1}, + {NULL, 0} +}; + +static device_t +imx_hdmi_get_i2c_dev(device_t dev) +{ + struct imx_hdmi_softc *sc; + + sc = device_get_softc(dev); + + if (sc->i2c_xref == 0) + return (NULL); + + return (OF_device_from_xref(sc->i2c_xref)); +} + +/* + * Deferred HDMI init. dwc_hdmi_init() does i2c transfers for DDC/EDID. The imx + * i2c devices also use a config_intrhook function to finish their init, because + * they require interrupts to perform transfers. There is no way to control + * whether the i2c or our hdmi intrhook function runs first. If we go first we + * have to continue waiting until after the i2c driver is ready to do transfers + * and has registered its phandle. + * + * This function is used as both a config_intrhook function and after that as an + * eventhandler callback function (if necessary), to see if our i2c device is + * ready yet. When it is, continue with hdmi init. When first called as an + * intrhook function the i2c devices might be ready, in which case we never + * register as an eventhandler at all. Otherwise we register to see newbus + * attach events, and as each device attaches we check to see whether it was the + * i2c device we care about. Once we have our i2c device we unregister from + * seeing further attach events. + */ +static void +imx_hdmi_init(void *dev) +{ + struct imx_hdmi_softc *sc; + + sc = device_get_softc((device_t)dev); + + if (OF_device_from_xref(sc->i2c_xref) != NULL) { + if (sc->eh_tag != NULL) { + EVENTHANDLER_DEREGISTER_NOWAIT(device_attach, + sc->eh_tag); + } + dwc_hdmi_init(dev); + return; + } + + if (bootverbose) + device_printf((device_t)dev, "Waiting for DDC i2c device\n"); + + if (sc->eh_tag == NULL) { + sc->eh_tag = EVENTHANDLER_REGISTER(device_attach, + imx_hdmi_init, dev, EVENTHANDLER_PRI_ANY); + } +} + +static int +imx_hdmi_detach(device_t dev) +{ + struct imx_hdmi_softc *sc; + + sc = device_get_softc(dev); + + 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 +imx_hdmi_attach(device_t dev) +{ + struct imx_hdmi_softc *sc; + int err; + uint32_t gpr3; + phandle_t node, i2c_xref; + + sc = device_get_softc(dev); + sc->base.sc_dev = dev; + sc->base.sc_get_i2c_dev = imx_hdmi_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-bus", &i2c_xref, sizeof(i2c_xref)) == -1) + sc->i2c_xref = 0; + else + sc->i2c_xref = i2c_xref; + + imx_ccm_hdmi_enable(); + + gpr3 = imx_iomux_gpr_get(IOMUXC_GPR3); + gpr3 &= ~(IOMUXC_GPR3_HDMI_MASK); + gpr3 |= IOMUXC_GPR3_HDMI_IPU1_DI0; + imx_iomux_gpr_set(IOMUXC_GPR3, gpr3); + + /* Further HDMI init requires interrupts for i2c transfers. */ + config_intrhook_oneshot(imx_hdmi_init, dev); + return (0); + +out: + imx_hdmi_detach(dev); + + return (err); +} + +static int +imx_hdmi_probe(device_t dev) +{ + + if (ofw_bus_search_compatible(dev, compat_data)->ocd_data == 0) + return (ENXIO); + + device_set_desc(dev, "Freescale i.MX6 HDMI core"); + + return (BUS_PROBE_DEFAULT); +} + +static device_method_t imx_hdmi_methods[] = { + /* Device interface */ + DEVMETHOD(device_probe, imx_hdmi_probe), + DEVMETHOD(device_attach, imx_hdmi_attach), + DEVMETHOD(device_detach, imx_hdmi_detach), + + /* CRTC methods */ + DEVMETHOD(crtc_get_edid, dwc_hdmi_get_edid), + DEVMETHOD(crtc_set_videomode, dwc_hdmi_set_videomode), + + DEVMETHOD_END +}; + +static driver_t imx_hdmi_driver = { + "hdmi", + imx_hdmi_methods, + sizeof(struct imx_hdmi_softc) +}; + +DRIVER_MODULE(hdmi, simplebus, imx_hdmi_driver, 0, 0); |