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: stable/12/sys/dev/mmc/host/dwmmc_samsung.c 362400 2020-06-19 18:05:14Z manu $");
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.h>
44 #include <dev/ofw/ofw_bus_subr.h>
45
46 #include <dev/mmc/host/dwmmc_var.h>
47 #include <dev/mmc/host/dwmmc_reg.h>
48
49 #define WRITE4(_sc, _reg, _val) \
50 bus_write_4((_sc)->res[0], _reg, _val)
51
52 static struct ofw_compat_data compat_data[] = {
53 {"samsung,exynos5420-dw-mshc", 1},
54 {NULL, 0},
55 };
56
57 static int
samsung_dwmmc_probe(device_t dev)58 samsung_dwmmc_probe(device_t dev)
59 {
60
61 if (!ofw_bus_status_okay(dev))
62 return (ENXIO);
63
64 if (ofw_bus_search_compatible(dev, compat_data)->ocd_data == 0)
65 return (ENXIO);
66
67 device_set_desc(dev, "Synopsys DesignWare Mobile "
68 "Storage Host Controller (Samsung)");
69
70 return (BUS_PROBE_VENDOR);
71 }
72
73 static int
samsung_dwmmc_attach(device_t dev)74 samsung_dwmmc_attach(device_t dev)
75 {
76 struct dwmmc_softc *sc;
77 pcell_t dts_value[3];
78 phandle_t node;
79 int len;
80
81 sc = device_get_softc(dev);
82 sc->hwtype = HWTYPE_EXYNOS;
83
84 if ((node = ofw_bus_get_node(sc->dev)) == -1)
85 return (ENXIO);
86
87 if ((len = OF_getproplen(node, "samsung,dw-mshc-ciu-div")) <= 0)
88 return (ENXIO);
89 OF_getencprop(node, "samsung,dw-mshc-ciu-div", dts_value, len);
90 sc->sdr_timing = (dts_value[0] << SDMMC_CLKSEL_DIVIDER_SHIFT);
91 sc->ddr_timing = (dts_value[0] << SDMMC_CLKSEL_DIVIDER_SHIFT);
92
93 if ((len = OF_getproplen(node, "samsung,dw-mshc-sdr-timing")) <= 0)
94 return (ENXIO);
95 OF_getencprop(node, "samsung,dw-mshc-sdr-timing", dts_value, len);
96 sc->sdr_timing |= ((dts_value[0] << SDMMC_CLKSEL_SAMPLE_SHIFT) |
97 (dts_value[1] << SDMMC_CLKSEL_DRIVE_SHIFT));
98
99 if ((len = OF_getproplen(node, "samsung,dw-mshc-ddr-timing")) <= 0)
100 return (ENXIO);
101 OF_getencprop(node, "samsung,dw-mshc-ddr-timing", dts_value, len);
102 sc->ddr_timing |= ((dts_value[0] << SDMMC_CLKSEL_SAMPLE_SHIFT) |
103 (dts_value[1] << SDMMC_CLKSEL_DRIVE_SHIFT));
104
105 WRITE4(sc, EMMCP_MPSBEGIN0, 0);
106 WRITE4(sc, EMMCP_SEND0, 0);
107 WRITE4(sc, EMMCP_CTRL0, (MPSCTRL_SECURE_READ_BIT |
108 MPSCTRL_SECURE_WRITE_BIT |
109 MPSCTRL_NON_SECURE_READ_BIT |
110 MPSCTRL_NON_SECURE_WRITE_BIT |
111 MPSCTRL_VALID));
112
113 return (dwmmc_attach(dev));
114 }
115
116 static device_method_t samsung_dwmmc_methods[] = {
117 /* bus interface */
118 DEVMETHOD(device_probe, samsung_dwmmc_probe),
119 DEVMETHOD(device_attach, samsung_dwmmc_attach),
120
121 DEVMETHOD_END
122 };
123
124 static devclass_t samsung_dwmmc_devclass;
125
126 DEFINE_CLASS_1(samsung_dwmmc, samsung_dwmmc_driver, samsung_dwmmc_methods,
127 sizeof(struct dwmmc_softc), dwmmc_driver);
128
129 DRIVER_MODULE(samsung_dwmmc, simplebus, samsung_dwmmc_driver,
130 samsung_dwmmc_devclass, 0, 0);
131 DRIVER_MODULE(samsung_dwmmc, ofwbus, samsung_dwmmc_driver, samsung_dwmmc_devclass
132 , NULL, NULL);
133 #ifndef MMCCAM
134 MMC_DECLARE_BRIDGE(samsung_dwmmc);
135 #endif
136