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 #include <sys/queue.h> 35 #include <sys/taskqueue.h> 36 37 #include <machine/bus.h> 38 39 #include <dev/mmc/bridge.h> 40 41 #include <dev/ofw/ofw_bus_subr.h> 42 43 #ifdef EXT_RESOURCES 44 #include <dev/extres/clk/clk.h> 45 #endif 46 47 #include <dev/mmc/host/dwmmc_var.h> 48 49 #include "opt_mmccam.h" 50 51 enum RKTYPE { 52 RK2928 = 1, 53 RK3288, 54 }; 55 56 static struct ofw_compat_data compat_data[] = { 57 {"rockchip,rk2928-dw-mshc", RK2928}, 58 {"rockchip,rk3288-dw-mshc", RK3288}, 59 {NULL, 0}, 60 }; 61 62 static int dwmmc_rockchip_update_ios(struct dwmmc_softc *sc, struct mmc_ios *ios); 63 64 static int 65 rockchip_dwmmc_probe(device_t dev) 66 { 67 68 if (!ofw_bus_status_okay(dev)) 69 return (ENXIO); 70 71 if (ofw_bus_search_compatible(dev, compat_data)->ocd_data == 0) 72 return (ENXIO); 73 74 device_set_desc(dev, "Synopsys DesignWare Mobile " 75 "Storage Host Controller (RockChip)"); 76 77 return (BUS_PROBE_VENDOR); 78 } 79 80 static int 81 rockchip_dwmmc_attach(device_t dev) 82 { 83 struct dwmmc_softc *sc; 84 int type; 85 86 sc = device_get_softc(dev); 87 sc->hwtype = HWTYPE_ROCKCHIP; 88 type = ofw_bus_search_compatible(dev, compat_data)->ocd_data; 89 90 switch (type) { 91 case RK2928: 92 sc->use_pio = 1; 93 break; 94 } 95 96 sc->pwren_inverted = 1; 97 98 #ifdef EXT_RESOURCES 99 sc->update_ios = &dwmmc_rockchip_update_ios; 100 #endif 101 102 return (dwmmc_attach(dev)); 103 } 104 105 #ifdef EXT_RESOURCES 106 static int 107 dwmmc_rockchip_update_ios(struct dwmmc_softc *sc, struct mmc_ios *ios) 108 { 109 unsigned int clock; 110 int error; 111 112 if (ios->clock && ios->clock != sc->bus_hz) { 113 sc->bus_hz = clock = ios->clock; 114 /* Set the MMC clock. */ 115 if (sc->ciu) { 116 /* 117 * Apparently you need to set the ciu clock to 118 * the double of bus_hz 119 */ 120 error = clk_set_freq(sc->ciu, clock * 2, 121 CLK_SET_ROUND_DOWN); 122 if (error != 0) { 123 device_printf(sc->dev, 124 "failed to set frequency to %u Hz: %d\n", 125 clock, error); 126 return (error); 127 } 128 } 129 } 130 return (0); 131 } 132 #endif 133 134 static device_method_t rockchip_dwmmc_methods[] = { 135 /* bus interface */ 136 DEVMETHOD(device_probe, rockchip_dwmmc_probe), 137 DEVMETHOD(device_attach, rockchip_dwmmc_attach), 138 DEVMETHOD(device_detach, dwmmc_detach), 139 140 DEVMETHOD_END 141 }; 142 143 static devclass_t rockchip_dwmmc_devclass; 144 145 DEFINE_CLASS_1(rockchip_dwmmc, rockchip_dwmmc_driver, rockchip_dwmmc_methods, 146 sizeof(struct dwmmc_softc), dwmmc_driver); 147 148 DRIVER_MODULE(rockchip_dwmmc, simplebus, rockchip_dwmmc_driver, 149 rockchip_dwmmc_devclass, 0, 0); 150 DRIVER_MODULE(rockchip_dwmmc, ofwbus, rockchip_dwmmc_driver, 151 rockchip_dwmmc_devclass, NULL, NULL); 152 #ifndef MMCCAM 153 MMC_DECLARE_BRIDGE(rockchip_dwmmc); 154 #endif 155