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
47 enum RKTYPE {
48 RK2928 = 1,
49 RK3288,
50 };
51
52 static struct ofw_compat_data compat_data[] = {
53 {"rockchip,rk2928-dw-mshc", RK2928},
54 {"rockchip,rk3288-dw-mshc", RK3288},
55 {NULL, 0},
56 };
57
58 static int dwmmc_rockchip_update_ios(struct dwmmc_softc *sc, struct mmc_ios *ios);
59
60 static int
rockchip_dwmmc_probe(device_t dev)61 rockchip_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
76 static int
rockchip_dwmmc_attach(device_t dev)77 rockchip_dwmmc_attach(device_t dev)
78 {
79 struct dwmmc_softc *sc;
80 int type;
81 int rc;
82
83 sc = device_get_softc(dev);
84 sc->hwtype = HWTYPE_ROCKCHIP;
85 type = ofw_bus_search_compatible(dev, compat_data)->ocd_data;
86
87 switch (type) {
88 case RK2928:
89 sc->use_pio = 1;
90 break;
91 }
92
93 sc->update_ios = &dwmmc_rockchip_update_ios;
94 rc = dwmmc_attach(dev);
95
96 /*
97 * Note: It's not that the controller doesn't support HS200,
98 * it's that FreeBSD doesn't support tuning.
99 * If someone implemented tuning, this could work.
100 */
101 device_printf(dev, "Disabling HS200+ (tuning code not written)\n");
102 sc->host.caps &= ~(MMC_CAP_MMC_HS200 | MMC_CAP_MMC_HS400);
103
104 return (rc);
105 }
106
107 static int
dwmmc_rockchip_update_ios(struct dwmmc_softc * sc,struct mmc_ios * ios)108 dwmmc_rockchip_update_ios(struct dwmmc_softc *sc, struct mmc_ios *ios)
109 {
110 unsigned int clock;
111 int error;
112
113 if (ios->clock && ios->clock != sc->bus_hz) {
114 sc->bus_hz = clock = ios->clock;
115 /* Set the MMC clock. */
116 if (sc->ciu) {
117 /*
118 * Apparently you need to set the ciu clock to
119 * the double of bus_hz
120 */
121 error = clk_set_freq(sc->ciu, clock * 2,
122 CLK_SET_ROUND_DOWN);
123 if (error != 0) {
124 device_printf(sc->dev,
125 "failed to set frequency to %u Hz: %d\n",
126 clock, error);
127 return (error);
128 }
129 }
130 }
131 return (0);
132 }
133
134 static device_method_t rockchip_dwmmc_methods[] = {
135 /* bus interface */
136 DEVMETHOD(device_probe, rockchip_dwmmc_probe),
137 DEVMETHOD(device_attach, rockchip_dwmmc_attach),
138 DEVMETHOD(device_detach, dwmmc_detach),
139
140 DEVMETHOD_END
141 };
142
143 DEFINE_CLASS_1(rockchip_dwmmc, rockchip_dwmmc_driver, rockchip_dwmmc_methods,
144 sizeof(struct dwmmc_softc), dwmmc_driver);
145
146 DRIVER_MODULE(rockchip_dwmmc, simplebus, rockchip_dwmmc_driver, 0, 0);
147 DRIVER_MODULE(rockchip_dwmmc, ofwbus, rockchip_dwmmc_driver, NULL, NULL);
148 #ifndef MMCCAM
149 MMC_DECLARE_BRIDGE(rockchip_dwmmc);
150 #endif
151