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/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
dwc_hdmi_fdt_get_i2c_dev(device_t dev)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
dwc_hdmi_fdt_detach(device_t dev)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
dwc_hdmi_fdt_attach(device_t dev)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
dwc_hdmi_fdt_probe(device_t dev)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