2 * Copyright 2017 Emmanuel Vadot <manu@freebsd.org>
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions are
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.
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.
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD$");
30 #include <sys/param.h>
31 #include <sys/kernel.h>
33 #include <sys/module.h>
34 #include <sys/queue.h>
35 #include <sys/taskqueue.h>
37 #include <machine/bus.h>
39 #include <dev/mmc/bridge.h>
40 #include <dev/mmc/mmc_fdt_helpers.h>
42 #include <dev/ofw/ofw_bus.h>
43 #include <dev/ofw/ofw_bus_subr.h>
45 #include <dev/mmc/host/dwmmc_var.h>
46 #include <dev/mmc/host/dwmmc_reg.h>
48 #define WRITE4(_sc, _reg, _val) \
49 bus_write_4((_sc)->res[0], _reg, _val)
51 static struct ofw_compat_data compat_data[] = {
52 {"samsung,exynos5420-dw-mshc", 1},
57 samsung_dwmmc_probe(device_t dev)
60 if (!ofw_bus_status_okay(dev))
63 if (ofw_bus_search_compatible(dev, compat_data)->ocd_data == 0)
66 device_set_desc(dev, "Synopsys DesignWare Mobile "
67 "Storage Host Controller (Samsung)");
69 return (BUS_PROBE_VENDOR);
73 samsung_dwmmc_attach(device_t dev)
75 struct dwmmc_softc *sc;
80 sc = device_get_softc(dev);
81 sc->hwtype = HWTYPE_EXYNOS;
83 if ((node = ofw_bus_get_node(sc->dev)) == -1)
86 if ((len = OF_getproplen(node, "samsung,dw-mshc-ciu-div")) <= 0)
88 OF_getencprop(node, "samsung,dw-mshc-ciu-div", dts_value, len);
89 sc->sdr_timing = (dts_value[0] << SDMMC_CLKSEL_DIVIDER_SHIFT);
90 sc->ddr_timing = (dts_value[0] << SDMMC_CLKSEL_DIVIDER_SHIFT);
92 if ((len = OF_getproplen(node, "samsung,dw-mshc-sdr-timing")) <= 0)
94 OF_getencprop(node, "samsung,dw-mshc-sdr-timing", dts_value, len);
95 sc->sdr_timing |= ((dts_value[0] << SDMMC_CLKSEL_SAMPLE_SHIFT) |
96 (dts_value[1] << SDMMC_CLKSEL_DRIVE_SHIFT));
98 if ((len = OF_getproplen(node, "samsung,dw-mshc-ddr-timing")) <= 0)
100 OF_getencprop(node, "samsung,dw-mshc-ddr-timing", dts_value, len);
101 sc->ddr_timing |= ((dts_value[0] << SDMMC_CLKSEL_SAMPLE_SHIFT) |
102 (dts_value[1] << SDMMC_CLKSEL_DRIVE_SHIFT));
104 WRITE4(sc, EMMCP_MPSBEGIN0, 0);
105 WRITE4(sc, EMMCP_SEND0, 0);
106 WRITE4(sc, EMMCP_CTRL0, (MPSCTRL_SECURE_READ_BIT |
107 MPSCTRL_SECURE_WRITE_BIT |
108 MPSCTRL_NON_SECURE_READ_BIT |
109 MPSCTRL_NON_SECURE_WRITE_BIT |
112 return (dwmmc_attach(dev));
115 static device_method_t samsung_dwmmc_methods[] = {
117 DEVMETHOD(device_probe, samsung_dwmmc_probe),
118 DEVMETHOD(device_attach, samsung_dwmmc_attach),
123 static devclass_t samsung_dwmmc_devclass;
125 DEFINE_CLASS_1(samsung_dwmmc, samsung_dwmmc_driver, samsung_dwmmc_methods,
126 sizeof(struct dwmmc_softc), dwmmc_driver);
128 DRIVER_MODULE(samsung_dwmmc, simplebus, samsung_dwmmc_driver,
129 samsung_dwmmc_devclass, 0, 0);
130 DRIVER_MODULE(samsung_dwmmc, ofwbus, samsung_dwmmc_driver, samsung_dwmmc_devclass
133 MMC_DECLARE_BRIDGE(samsung_dwmmc);