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
54struct 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
61static struct ofw_compat_data compat_data[] = {
62	{ "synopsys,dwc-hdmi",	1 },
63	{ NULL,	            	0 }
64};
65
66static device_t
67dwc_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
79static int
80dwc_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
98static int
99dwc_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
159out:
160
161	dwc_hdmi_fdt_detach(dev);
162
163	return (err);
164}
165
166static int
167dwc_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
178static 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
191static driver_t dwc_hdmi_fdt_driver = {
192	"dwc_hdmi",
193	dwc_hdmi_fdt_methods,
194	sizeof(struct dwc_hdmi_fdt_softc)
195};
196
197DRIVER_MODULE(dwc_hdmi_fdt, simplebus, dwc_hdmi_fdt_driver, 0, 0);
198