1 /*- 2 * Copyright (c) 2015 Oleksandr Tymoshenko <gonzo@freebsd.org> 3 * Copyright (c) 2016 Jared McNeill <jmcneill@invisible.ca> 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 */ 27 28 #include <sys/cdefs.h> 29 /* 30 * HDMI core module 31 */ 32 33 #include <sys/param.h> 34 #include <sys/systm.h> 35 #include <sys/kernel.h> 36 #include <sys/module.h> 37 #include <sys/bus.h> 38 #include <sys/rman.h> 39 40 #include <dev/ofw/ofw_bus.h> 41 #include <dev/ofw/ofw_bus_subr.h> 42 43 #include <machine/bus.h> 44 45 #include <dev/extres/clk/clk.h> 46 47 #include <dev/videomode/videomode.h> 48 #include <dev/videomode/edidvar.h> 49 50 #include <dev/hdmi/dwc_hdmi.h> 51 52 #include "crtc_if.h" 53 54 struct dwc_hdmi_fdt_softc { 55 struct dwc_hdmi_softc base; 56 clk_t clk_hdmi; 57 clk_t clk_ahb; 58 phandle_t i2c_xref; 59 }; 60 61 static struct ofw_compat_data compat_data[] = { 62 { "synopsys,dwc-hdmi", 1 }, 63 { NULL, 0 } 64 }; 65 66 static device_t 67 dwc_hdmi_fdt_get_i2c_dev(device_t dev) 68 { 69 struct dwc_hdmi_fdt_softc *sc; 70 71 sc = device_get_softc(dev); 72 73 if (sc->i2c_xref == 0) 74 return (NULL); 75 76 return (OF_device_from_xref(sc->i2c_xref)); 77 } 78 79 static int 80 dwc_hdmi_fdt_detach(device_t dev) 81 { 82 struct dwc_hdmi_fdt_softc *sc; 83 84 sc = device_get_softc(dev); 85 86 if (sc->clk_ahb != NULL) 87 clk_release(sc->clk_ahb); 88 if (sc->clk_hdmi != NULL) 89 clk_release(sc->clk_hdmi); 90 91 if (sc->base.sc_mem_res != NULL) 92 bus_release_resource(dev, SYS_RES_MEMORY, 93 sc->base.sc_mem_rid, sc->base.sc_mem_res); 94 95 return (0); 96 } 97 98 static int 99 dwc_hdmi_fdt_attach(device_t dev) 100 { 101 struct dwc_hdmi_fdt_softc *sc; 102 phandle_t node, i2c_xref; 103 uint32_t freq; 104 int err; 105 106 sc = device_get_softc(dev); 107 sc->base.sc_dev = dev; 108 sc->base.sc_get_i2c_dev = dwc_hdmi_fdt_get_i2c_dev; 109 err = 0; 110 111 /* Allocate memory resources. */ 112 sc->base.sc_mem_rid = 0; 113 sc->base.sc_mem_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, 114 &sc->base.sc_mem_rid, RF_ACTIVE); 115 if (sc->base.sc_mem_res == NULL) { 116 device_printf(dev, "Cannot allocate memory resources\n"); 117 err = ENXIO; 118 goto out; 119 } 120 121 node = ofw_bus_get_node(dev); 122 if (OF_getencprop(node, "ddc", &i2c_xref, sizeof(i2c_xref)) == -1) 123 sc->i2c_xref = 0; 124 else 125 sc->i2c_xref = i2c_xref; 126 127 if (OF_getencprop(node, "reg-shift", &sc->base.sc_reg_shift, 128 sizeof(sc->base.sc_reg_shift)) <= 0) 129 sc->base.sc_reg_shift = 0; 130 131 if (clk_get_by_ofw_name(dev, 0, "hdmi", &sc->clk_hdmi) != 0 || 132 clk_get_by_ofw_name(dev, 0, "ahb", &sc->clk_ahb) != 0) { 133 device_printf(dev, "Cannot get clocks\n"); 134 err = ENXIO; 135 goto out; 136 } 137 if (OF_getencprop(node, "clock-frequency", &freq, sizeof(freq)) > 0) { 138 err = clk_set_freq(sc->clk_hdmi, freq, CLK_SET_ROUND_DOWN); 139 if (err != 0) { 140 device_printf(dev, 141 "Cannot set HDMI clock frequency to %u Hz\n", freq); 142 goto out; 143 } 144 } else 145 device_printf(dev, "HDMI clock frequency not specified\n"); 146 if (clk_enable(sc->clk_hdmi) != 0) { 147 device_printf(dev, "Cannot enable HDMI clock\n"); 148 err = ENXIO; 149 goto out; 150 } 151 if (clk_enable(sc->clk_ahb) != 0) { 152 device_printf(dev, "Cannot enable AHB clock\n"); 153 err = ENXIO; 154 goto out; 155 } 156 157 return (dwc_hdmi_init(dev)); 158 159 out: 160 161 dwc_hdmi_fdt_detach(dev); 162 163 return (err); 164 } 165 166 static int 167 dwc_hdmi_fdt_probe(device_t dev) 168 { 169 170 if (ofw_bus_search_compatible(dev, compat_data)->ocd_data == 0) 171 return (ENXIO); 172 173 device_set_desc(dev, "Synopsys DesignWare HDMI Controller"); 174 175 return (BUS_PROBE_DEFAULT); 176 } 177 178 static device_method_t dwc_hdmi_fdt_methods[] = { 179 /* Device interface */ 180 DEVMETHOD(device_probe, dwc_hdmi_fdt_probe), 181 DEVMETHOD(device_attach, dwc_hdmi_fdt_attach), 182 DEVMETHOD(device_detach, dwc_hdmi_fdt_detach), 183 184 /* HDMI methods */ 185 DEVMETHOD(hdmi_get_edid, dwc_hdmi_get_edid), 186 DEVMETHOD(hdmi_set_videomode, dwc_hdmi_set_videomode), 187 188 DEVMETHOD_END 189 }; 190 191 static driver_t dwc_hdmi_fdt_driver = { 192 "dwc_hdmi", 193 dwc_hdmi_fdt_methods, 194 sizeof(struct dwc_hdmi_fdt_softc) 195 }; 196 197 DRIVER_MODULE(dwc_hdmi_fdt, simplebus, dwc_hdmi_fdt_driver, 0, 0); 198