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 __FBSDID("$FreeBSD$"); 29 30 #include <sys/param.h> 31 #include <sys/kernel.h> 32 #include <sys/bus.h> 33 #include <sys/module.h> 34 35 #include <machine/bus.h> 36 37 #include <dev/mmc/bridge.h> 38 39 #include <dev/ofw/ofw_bus_subr.h> 40 41 #ifdef EXT_RESOURCES 42 #include <dev/extres/clk/clk.h> 43 #endif 44 45 #include <dev/mmc/host/dwmmc_var.h> 46 47 #include "opt_mmccam.h" 48 49 enum RKTYPE { 50 RK2928 = 1, 51 RK3288, 52 }; 53 54 static struct ofw_compat_data compat_data[] = { 55 {"rockchip,rk2928-dw-mshc", RK2928}, 56 {"rockchip,rk3288-dw-mshc", RK3288}, 57 {NULL, 0}, 58 }; 59 60 static int dwmmc_rockchip_update_ios(struct dwmmc_softc *sc, struct mmc_ios *ios); 61 62 static int 63 rockchip_dwmmc_probe(device_t dev) 64 { 65 66 if (!ofw_bus_status_okay(dev)) 67 return (ENXIO); 68 69 if (ofw_bus_search_compatible(dev, compat_data)->ocd_data == 0) 70 return (ENXIO); 71 72 device_set_desc(dev, "Synopsys DesignWare Mobile " 73 "Storage Host Controller (RockChip)"); 74 75 return (BUS_PROBE_VENDOR); 76 } 77 78 static int 79 rockchip_dwmmc_attach(device_t dev) 80 { 81 struct dwmmc_softc *sc; 82 int type; 83 84 sc = device_get_softc(dev); 85 sc->hwtype = HWTYPE_ROCKCHIP; 86 type = ofw_bus_search_compatible(dev, compat_data)->ocd_data; 87 88 switch (type) { 89 case RK2928: 90 sc->use_pio = 1; 91 break; 92 } 93 94 sc->pwren_inverted = 1; 95 96 #ifdef EXT_RESOURCES 97 sc->update_ios = &dwmmc_rockchip_update_ios; 98 #endif 99 100 return (dwmmc_attach(dev)); 101 } 102 103 #ifdef EXT_RESOURCES 104 static int 105 dwmmc_rockchip_update_ios(struct dwmmc_softc *sc, struct mmc_ios *ios) 106 { 107 unsigned int clock; 108 int error; 109 110 if (ios->clock && ios->clock != sc->bus_hz) { 111 sc->bus_hz = clock = ios->clock; 112 /* Set the MMC clock. */ 113 if (sc->ciu) { 114 /* 115 * Apparently you need to set the ciu clock to 116 * the double of bus_hz 117 */ 118 error = clk_set_freq(sc->ciu, clock * 2, 119 CLK_SET_ROUND_DOWN); 120 if (error != 0) { 121 device_printf(sc->dev, 122 "failed to set frequency to %u Hz: %d\n", 123 clock, error); 124 return (error); 125 } 126 } 127 } 128 return (0); 129 } 130 #endif 131 132 static device_method_t rockchip_dwmmc_methods[] = { 133 /* bus interface */ 134 DEVMETHOD(device_probe, rockchip_dwmmc_probe), 135 DEVMETHOD(device_attach, rockchip_dwmmc_attach), 136 137 DEVMETHOD_END 138 }; 139 140 static devclass_t rockchip_dwmmc_devclass; 141 142 DEFINE_CLASS_1(rockchip_dwmmc, rockchip_dwmmc_driver, rockchip_dwmmc_methods, 143 sizeof(struct dwmmc_softc), dwmmc_driver); 144 145 DRIVER_MODULE(rockchip_dwmmc, simplebus, rockchip_dwmmc_driver, 146 rockchip_dwmmc_devclass, 0, 0); 147 DRIVER_MODULE(rockchip_dwmmc, ofwbus, rockchip_dwmmc_driver, 148 rockchip_dwmmc_devclass, NULL, NULL); 149 #ifndef MMCCAM 150 MMC_DECLARE_BRIDGE(rockchip_dwmmc); 151 #endif 152