1/*
2 * Copyright 2017 Emmanuel Vadot <manu@freebsd.org>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are
7 * met:
8 *
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
18 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE
19 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
20 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
21 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
22 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
23 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
24 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
25 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 */
27
28#include <sys/cdefs.h>
29__FBSDID("$FreeBSD$");
30
31#include <sys/param.h>
32#include <sys/kernel.h>
33#include <sys/bus.h>
34#include <sys/module.h>
35#include <sys/queue.h>
36#include <sys/taskqueue.h>
37
38#include <machine/bus.h>
39
40#include <dev/mmc/bridge.h>
41#include <dev/mmc/mmc_fdt_helpers.h>
42
43#include <dev/ofw/ofw_bus_subr.h>
44
45#ifdef EXT_RESOURCES
46#include <dev/extres/clk/clk.h>
47#endif
48
49#include <dev/mmc/host/dwmmc_var.h>
50
51#include "opt_mmccam.h"
52
53enum RKTYPE {
54	RK2928 = 1,
55	RK3288,
56};
57
58static struct ofw_compat_data compat_data[] = {
59	{"rockchip,rk2928-dw-mshc",	RK2928},
60	{"rockchip,rk3288-dw-mshc",	RK3288},
61	{NULL,				0},
62};
63
64static int dwmmc_rockchip_update_ios(struct dwmmc_softc *sc, struct mmc_ios *ios);
65
66static int
67rockchip_dwmmc_probe(device_t dev)
68{
69
70	if (!ofw_bus_status_okay(dev))
71		return (ENXIO);
72
73	if (ofw_bus_search_compatible(dev, compat_data)->ocd_data == 0)
74		return (ENXIO);
75
76	device_set_desc(dev, "Synopsys DesignWare Mobile "
77	    "Storage Host Controller (RockChip)");
78
79	return (BUS_PROBE_VENDOR);
80}
81
82static int
83rockchip_dwmmc_attach(device_t dev)
84{
85	struct dwmmc_softc *sc;
86	int type;
87
88	sc = device_get_softc(dev);
89	sc->hwtype = HWTYPE_ROCKCHIP;
90	type = ofw_bus_search_compatible(dev, compat_data)->ocd_data;
91
92	switch (type) {
93	case RK2928:
94		sc->use_pio = 1;
95		break;
96	}
97
98	sc->pwren_inverted = 1;
99
100#ifdef EXT_RESOURCES
101	sc->update_ios = &dwmmc_rockchip_update_ios;
102#endif
103
104	return (dwmmc_attach(dev));
105}
106
107#ifdef EXT_RESOURCES
108static int
109dwmmc_rockchip_update_ios(struct dwmmc_softc *sc, struct mmc_ios *ios)
110{
111	unsigned int clock;
112	int error;
113
114	if (ios->clock && ios->clock != sc->bus_hz) {
115		sc->bus_hz = clock = ios->clock;
116		/* Set the MMC clock. */
117		if (sc->ciu) {
118			/*
119			 * Apparently you need to set the ciu clock to
120			 * the double of bus_hz
121			 */
122			error = clk_set_freq(sc->ciu, clock * 2,
123			    CLK_SET_ROUND_DOWN);
124			if (error != 0) {
125				device_printf(sc->dev,
126				    "failed to set frequency to %u Hz: %d\n",
127				    clock, error);
128				return (error);
129			}
130		}
131	}
132	return (0);
133}
134#endif
135
136static device_method_t rockchip_dwmmc_methods[] = {
137	/* bus interface */
138	DEVMETHOD(device_probe, rockchip_dwmmc_probe),
139	DEVMETHOD(device_attach, rockchip_dwmmc_attach),
140	DEVMETHOD(device_detach, dwmmc_detach),
141
142	DEVMETHOD_END
143};
144
145static devclass_t rockchip_dwmmc_devclass;
146
147DEFINE_CLASS_1(rockchip_dwmmc, rockchip_dwmmc_driver, rockchip_dwmmc_methods,
148    sizeof(struct dwmmc_softc), dwmmc_driver);
149
150DRIVER_MODULE(rockchip_dwmmc, simplebus, rockchip_dwmmc_driver,
151    rockchip_dwmmc_devclass, 0, 0);
152DRIVER_MODULE(rockchip_dwmmc, ofwbus, rockchip_dwmmc_driver,
153    rockchip_dwmmc_devclass, NULL, NULL);
154#ifndef MMCCAM
155MMC_DECLARE_BRIDGE(rockchip_dwmmc);
156#endif
157