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/cdefs.h>
28 #include <sys/param.h>
29 #include <sys/kernel.h>
30 #include <sys/bus.h>
31 #include <sys/module.h>
32 #include <sys/queue.h>
33 #include <sys/taskqueue.h>
34
35 #include <machine/bus.h>
36
37 #include <dev/mmc/bridge.h>
38 #include <dev/mmc/mmc_fdt_helpers.h>
39
40 #include <dev/ofw/ofw_bus.h>
41 #include <dev/ofw/ofw_bus_subr.h>
42
43 #include <dev/mmc/host/dwmmc_var.h>
44 #include <dev/mmc/host/dwmmc_reg.h>
45
46 #define WRITE4(_sc, _reg, _val) \
47 bus_write_4((_sc)->res[0], _reg, _val)
48
49 static struct ofw_compat_data compat_data[] = {
50 {"samsung,exynos5420-dw-mshc", 1},
51 {NULL, 0},
52 };
53
54 static int
samsung_dwmmc_probe(device_t dev)55 samsung_dwmmc_probe(device_t dev)
56 {
57
58 if (!ofw_bus_status_okay(dev))
59 return (ENXIO);
60
61 if (ofw_bus_search_compatible(dev, compat_data)->ocd_data == 0)
62 return (ENXIO);
63
64 device_set_desc(dev, "Synopsys DesignWare Mobile "
65 "Storage Host Controller (Samsung)");
66
67 return (BUS_PROBE_VENDOR);
68 }
69
70 static int
samsung_dwmmc_attach(device_t dev)71 samsung_dwmmc_attach(device_t dev)
72 {
73 struct dwmmc_softc *sc;
74 pcell_t dts_value[3];
75 phandle_t node;
76 int len;
77
78 sc = device_get_softc(dev);
79 sc->hwtype = HWTYPE_EXYNOS;
80
81 if ((node = ofw_bus_get_node(sc->dev)) == -1)
82 return (ENXIO);
83
84 if ((len = OF_getproplen(node, "samsung,dw-mshc-ciu-div")) <= 0)
85 return (ENXIO);
86 OF_getencprop(node, "samsung,dw-mshc-ciu-div", dts_value, len);
87 sc->sdr_timing = (dts_value[0] << SDMMC_CLKSEL_DIVIDER_SHIFT);
88 sc->ddr_timing = (dts_value[0] << SDMMC_CLKSEL_DIVIDER_SHIFT);
89
90 if ((len = OF_getproplen(node, "samsung,dw-mshc-sdr-timing")) <= 0)
91 return (ENXIO);
92 OF_getencprop(node, "samsung,dw-mshc-sdr-timing", dts_value, len);
93 sc->sdr_timing |= ((dts_value[0] << SDMMC_CLKSEL_SAMPLE_SHIFT) |
94 (dts_value[1] << SDMMC_CLKSEL_DRIVE_SHIFT));
95
96 if ((len = OF_getproplen(node, "samsung,dw-mshc-ddr-timing")) <= 0)
97 return (ENXIO);
98 OF_getencprop(node, "samsung,dw-mshc-ddr-timing", dts_value, len);
99 sc->ddr_timing |= ((dts_value[0] << SDMMC_CLKSEL_SAMPLE_SHIFT) |
100 (dts_value[1] << SDMMC_CLKSEL_DRIVE_SHIFT));
101
102 WRITE4(sc, EMMCP_MPSBEGIN0, 0);
103 WRITE4(sc, EMMCP_SEND0, 0);
104 WRITE4(sc, EMMCP_CTRL0, (MPSCTRL_SECURE_READ_BIT |
105 MPSCTRL_SECURE_WRITE_BIT |
106 MPSCTRL_NON_SECURE_READ_BIT |
107 MPSCTRL_NON_SECURE_WRITE_BIT |
108 MPSCTRL_VALID));
109
110 return (dwmmc_attach(dev));
111 }
112
113 static device_method_t samsung_dwmmc_methods[] = {
114 /* bus interface */
115 DEVMETHOD(device_probe, samsung_dwmmc_probe),
116 DEVMETHOD(device_attach, samsung_dwmmc_attach),
117
118 DEVMETHOD_END
119 };
120
121 static devclass_t samsung_dwmmc_devclass;
122
123 DEFINE_CLASS_1(samsung_dwmmc, samsung_dwmmc_driver, samsung_dwmmc_methods,
124 sizeof(struct dwmmc_softc), dwmmc_driver);
125
126 DRIVER_MODULE(samsung_dwmmc, simplebus, samsung_dwmmc_driver,
127 samsung_dwmmc_devclass, 0, 0);
128 DRIVER_MODULE(samsung_dwmmc, ofwbus, samsung_dwmmc_driver, samsung_dwmmc_devclass
129 , NULL, NULL);
130 #ifndef MMCCAM
131 MMC_DECLARE_BRIDGE(samsung_dwmmc);
132 #endif
133