1/*
2 * Copyright 2017 Emmanuel Vadot <manu@freebsd.org>
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions are
6 * met:
7 *
8 *  1. Redistributions of source code must retain the above copyright
9 *     notice, this list of conditions and the following disclaimer.
10 *  2. Redistributions in binary form must reproduce the above copyright
11 *     notice, this list of conditions and the following disclaimer in the
12 *     documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
17 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE
18 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
19 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
20 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
21 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
22 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
23 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
24 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26
27#include <sys/param.h>
28#include <sys/kernel.h>
29#include <sys/bus.h>
30#include <sys/module.h>
31#include <sys/queue.h>
32#include <sys/taskqueue.h>
33
34#include <machine/bus.h>
35
36#include <dev/mmc/bridge.h>
37#include <dev/mmc/mmc_fdt_helpers.h>
38
39#include <dev/ofw/ofw_bus_subr.h>
40
41#include <dev/clk/clk.h>
42
43#include <dev/mmc/host/dwmmc_var.h>
44
45#include "opt_mmccam.h"
46
47enum RKTYPE {
48	RK2928 = 1,
49	RK3288,
50};
51
52static struct ofw_compat_data compat_data[] = {
53	{"rockchip,rk2928-dw-mshc",	RK2928},
54	{"rockchip,rk3288-dw-mshc",	RK3288},
55	{NULL,				0},
56};
57
58static int dwmmc_rockchip_update_ios(struct dwmmc_softc *sc, struct mmc_ios *ios);
59
60static int
61rockchip_dwmmc_probe(device_t dev)
62{
63
64	if (!ofw_bus_status_okay(dev))
65		return (ENXIO);
66
67	if (ofw_bus_search_compatible(dev, compat_data)->ocd_data == 0)
68		return (ENXIO);
69
70	device_set_desc(dev, "Synopsys DesignWare Mobile "
71	    "Storage Host Controller (RockChip)");
72
73	return (BUS_PROBE_VENDOR);
74}
75
76static int
77rockchip_dwmmc_attach(device_t dev)
78{
79	struct dwmmc_softc *sc;
80	int type;
81
82	sc = device_get_softc(dev);
83	sc->hwtype = HWTYPE_ROCKCHIP;
84	type = ofw_bus_search_compatible(dev, compat_data)->ocd_data;
85
86	switch (type) {
87	case RK2928:
88		sc->use_pio = 1;
89		break;
90	}
91
92	sc->update_ios = &dwmmc_rockchip_update_ios;
93
94	return (dwmmc_attach(dev));
95}
96
97static int
98dwmmc_rockchip_update_ios(struct dwmmc_softc *sc, struct mmc_ios *ios)
99{
100	unsigned int clock;
101	int error;
102
103	if (ios->clock && ios->clock != sc->bus_hz) {
104		sc->bus_hz = clock = ios->clock;
105		/* Set the MMC clock. */
106		if (sc->ciu) {
107			/*
108			 * Apparently you need to set the ciu clock to
109			 * the double of bus_hz
110			 */
111			error = clk_set_freq(sc->ciu, clock * 2,
112			    CLK_SET_ROUND_DOWN);
113			if (error != 0) {
114				device_printf(sc->dev,
115				    "failed to set frequency to %u Hz: %d\n",
116				    clock, error);
117				return (error);
118			}
119		}
120	}
121	return (0);
122}
123
124static device_method_t rockchip_dwmmc_methods[] = {
125	/* bus interface */
126	DEVMETHOD(device_probe, rockchip_dwmmc_probe),
127	DEVMETHOD(device_attach, rockchip_dwmmc_attach),
128	DEVMETHOD(device_detach, dwmmc_detach),
129
130	DEVMETHOD_END
131};
132
133DEFINE_CLASS_1(rockchip_dwmmc, rockchip_dwmmc_driver, rockchip_dwmmc_methods,
134    sizeof(struct dwmmc_softc), dwmmc_driver);
135
136DRIVER_MODULE(rockchip_dwmmc, simplebus, rockchip_dwmmc_driver, 0, 0);
137DRIVER_MODULE(rockchip_dwmmc, ofwbus, rockchip_dwmmc_driver, NULL, NULL);
138#ifndef MMCCAM
139MMC_DECLARE_BRIDGE(rockchip_dwmmc);
140#endif
141