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
56struct 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
63static struct ofw_compat_data compat_data[] = {
64	{ "synopsys,dwc-hdmi",	1 },
65	{ NULL,	            	0 }
66};
67
68static device_t
69dwc_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
81static int
82dwc_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
100static int
101dwc_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
161out:
162
163	dwc_hdmi_fdt_detach(dev);
164
165	return (err);
166}
167
168static int
169dwc_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
180static 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
193static driver_t dwc_hdmi_fdt_driver = {
194	"dwc_hdmi",
195	dwc_hdmi_fdt_methods,
196	sizeof(struct dwc_hdmi_fdt_softc)
197};
198
199static devclass_t dwc_hdmi_fdt_devclass;
200
201DRIVER_MODULE(dwc_hdmi_fdt, simplebus, dwc_hdmi_fdt_driver,
202    dwc_hdmi_fdt_devclass, 0, 0);
203