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 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 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 DEFINE_CLASS_1(samsung_dwmmc, samsung_dwmmc_driver, samsung_dwmmc_methods, 122 sizeof(struct dwmmc_softc), dwmmc_driver); 123 124 DRIVER_MODULE(samsung_dwmmc, simplebus, samsung_dwmmc_driver, 0, 0); 125 DRIVER_MODULE(samsung_dwmmc, ofwbus, samsung_dwmmc_driver, NULL, NULL); 126 #ifndef MMCCAM 127 MMC_DECLARE_BRIDGE(samsung_dwmmc); 128 #endif 129