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 DRIVER_MODULE(dwc_hdmi_fdt, simplebus, dwc_hdmi_fdt_driver, 0, 0);
Cache object: 4ec8de8797a66549c0e6395f70a0fb24
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