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 __FBSDID("$FreeBSD$"); 30 31 /* 32 * HDMI core module 33 */ 34 35 #include <sys/param.h> 36 #include <sys/systm.h> 37 #include <sys/kernel.h> 38 #include <sys/module.h> 39 #include <sys/bus.h> 40 #include <sys/rman.h> 41 42 #include <dev/ofw/ofw_bus.h> 43 #include <dev/ofw/ofw_bus_subr.h> 44 45 #include <machine/bus.h> 46 47 #include <dev/extres/clk/clk.h> 48 49 #include <dev/videomode/videomode.h> 50 #include <dev/videomode/edidvar.h> 51 52 #include <dev/hdmi/dwc_hdmi.h> 53 54 #include "hdmi_if.h" 55 56 struct dwc_hdmi_fdt_softc { 57 struct dwc_hdmi_softc base; 58 clk_t clk_hdmi; 59 clk_t clk_ahb; 60 phandle_t i2c_xref; 61 }; 62 63 static struct ofw_compat_data compat_data[] = { 64 { "synopsys,dwc-hdmi", 1 }, 65 { NULL, 0 } 66 }; 67 68 static device_t 69 dwc_hdmi_fdt_get_i2c_dev(device_t dev) 70 { 71 struct dwc_hdmi_fdt_softc *sc; 72 73 sc = device_get_softc(dev); 74 75 if (sc->i2c_xref == 0) 76 return (NULL); 77 78 return (OF_device_from_xref(sc->i2c_xref)); 79 } 80 81 static int 82 dwc_hdmi_fdt_detach(device_t dev) 83 { 84 struct dwc_hdmi_fdt_softc *sc; 85 86 sc = device_get_softc(dev); 87 88 if (sc->clk_ahb != NULL) 89 clk_release(sc->clk_ahb); 90 if (sc->clk_hdmi != NULL) 91 clk_release(sc->clk_hdmi); 92 93 if (sc->base.sc_mem_res != NULL) 94 bus_release_resource(dev, SYS_RES_MEMORY, 95 sc->base.sc_mem_rid, sc->base.sc_mem_res); 96 97 return (0); 98 } 99 100 static int 101 dwc_hdmi_fdt_attach(device_t dev) 102 { 103 struct dwc_hdmi_fdt_softc *sc; 104 phandle_t node, i2c_xref; 105 uint32_t freq; 106 int err; 107 108 sc = device_get_softc(dev); 109 sc->base.sc_dev = dev; 110 sc->base.sc_get_i2c_dev = dwc_hdmi_fdt_get_i2c_dev; 111 err = 0; 112 113 /* Allocate memory resources. */ 114 sc->base.sc_mem_rid = 0; 115 sc->base.sc_mem_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, 116 &sc->base.sc_mem_rid, RF_ACTIVE); 117 if (sc->base.sc_mem_res == NULL) { 118 device_printf(dev, "Cannot allocate memory resources\n"); 119 err = ENXIO; 120 goto out; 121 } 122 123 node = ofw_bus_get_node(dev); 124 if (OF_getencprop(node, "ddc", &i2c_xref, sizeof(i2c_xref)) == -1) 125 sc->i2c_xref = 0; 126 else 127 sc->i2c_xref = i2c_xref; 128 129 if (OF_getencprop(node, "reg-shift", &sc->base.sc_reg_shift, 130 sizeof(sc->base.sc_reg_shift)) <= 0) 131 sc->base.sc_reg_shift = 0; 132 133 if (clk_get_by_ofw_name(dev, 0, "hdmi", &sc->clk_hdmi) != 0 || 134 clk_get_by_ofw_name(dev, 0, "ahb", &sc->clk_ahb) != 0) { 135 device_printf(dev, "Cannot get clocks\n"); 136 err = ENXIO; 137 goto out; 138 } 139 if (OF_getencprop(node, "clock-frequency", &freq, sizeof(freq)) > 0) { 140 err = clk_set_freq(sc->clk_hdmi, freq, CLK_SET_ROUND_DOWN); 141 if (err != 0) { 142 device_printf(dev, 143 "Cannot set HDMI clock frequency to %u Hz\n", freq); 144 goto out; 145 } 146 } else 147 device_printf(dev, "HDMI clock frequency not specified\n"); 148 if (clk_enable(sc->clk_hdmi) != 0) { 149 device_printf(dev, "Cannot enable HDMI clock\n"); 150 err = ENXIO; 151 goto out; 152 } 153 if (clk_enable(sc->clk_ahb) != 0) { 154 device_printf(dev, "Cannot enable AHB clock\n"); 155 err = ENXIO; 156 goto out; 157 } 158 159 return (dwc_hdmi_init(dev)); 160 161 out: 162 163 dwc_hdmi_fdt_detach(dev); 164 165 return (err); 166 } 167 168 static int 169 dwc_hdmi_fdt_probe(device_t dev) 170 { 171 172 if (ofw_bus_search_compatible(dev, compat_data)->ocd_data == 0) 173 return (ENXIO); 174 175 device_set_desc(dev, "Synopsys DesignWare HDMI Controller"); 176 177 return (BUS_PROBE_DEFAULT); 178 } 179 180 static device_method_t dwc_hdmi_fdt_methods[] = { 181 /* Device interface */ 182 DEVMETHOD(device_probe, dwc_hdmi_fdt_probe), 183 DEVMETHOD(device_attach, dwc_hdmi_fdt_attach), 184 DEVMETHOD(device_detach, dwc_hdmi_fdt_detach), 185 186 /* HDMI methods */ 187 DEVMETHOD(hdmi_get_edid, dwc_hdmi_get_edid), 188 DEVMETHOD(hdmi_set_videomode, dwc_hdmi_set_videomode), 189 190 DEVMETHOD_END 191 }; 192 193 static driver_t dwc_hdmi_fdt_driver = { 194 "dwc_hdmi", 195 dwc_hdmi_fdt_methods, 196 sizeof(struct dwc_hdmi_fdt_softc) 197 }; 198 199 static devclass_t dwc_hdmi_fdt_devclass; 200 201 DRIVER_MODULE(dwc_hdmi_fdt, simplebus, dwc_hdmi_fdt_driver, 202 dwc_hdmi_fdt_devclass, 0, 0); 203