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 #include <dev/mmc/mmc_fdt_helpers.h> 41 42 #include <dev/ofw/ofw_bus_subr.h> 43 44 #ifdef EXT_RESOURCES 45 #include <dev/extres/clk/clk.h> 46 #endif 47 48 #include <dev/mmc/host/dwmmc_var.h> 49 50 #include "opt_mmccam.h" 51 52 enum RKTYPE { 53 RK2928 = 1, 54 RK3288, 55 }; 56 57 static struct ofw_compat_data compat_data[] = { 58 {"rockchip,rk2928-dw-mshc", RK2928}, 59 {"rockchip,rk3288-dw-mshc", RK3288}, 60 {NULL, 0}, 61 }; 62 63 static int dwmmc_rockchip_update_ios(struct dwmmc_softc *sc, struct mmc_ios *ios); 64 65 static int 66 rockchip_dwmmc_probe(device_t dev) 67 { 68 69 if (!ofw_bus_status_okay(dev)) 70 return (ENXIO); 71 72 if (ofw_bus_search_compatible(dev, compat_data)->ocd_data == 0) 73 return (ENXIO); 74 75 device_set_desc(dev, "Synopsys DesignWare Mobile " 76 "Storage Host Controller (RockChip)"); 77 78 return (BUS_PROBE_VENDOR); 79 } 80 81 static int 82 rockchip_dwmmc_attach(device_t dev) 83 { 84 struct dwmmc_softc *sc; 85 int type; 86 87 sc = device_get_softc(dev); 88 sc->hwtype = HWTYPE_ROCKCHIP; 89 type = ofw_bus_search_compatible(dev, compat_data)->ocd_data; 90 91 switch (type) { 92 case RK2928: 93 sc->use_pio = 1; 94 break; 95 } 96 97 sc->pwren_inverted = 1; 98 99 #ifdef EXT_RESOURCES 100 sc->update_ios = &dwmmc_rockchip_update_ios; 101 #endif 102 103 return (dwmmc_attach(dev)); 104 } 105 106 #ifdef EXT_RESOURCES 107 static int 108 dwmmc_rockchip_update_ios(struct dwmmc_softc *sc, struct mmc_ios *ios) 109 { 110 unsigned int clock; 111 int error; 112 113 if (ios->clock && ios->clock != sc->bus_hz) { 114 sc->bus_hz = clock = ios->clock; 115 /* Set the MMC clock. */ 116 if (sc->ciu) { 117 /* 118 * Apparently you need to set the ciu clock to 119 * the double of bus_hz 120 */ 121 error = clk_set_freq(sc->ciu, clock * 2, 122 CLK_SET_ROUND_DOWN); 123 if (error != 0) { 124 device_printf(sc->dev, 125 "failed to set frequency to %u Hz: %d\n", 126 clock, error); 127 return (error); 128 } 129 } 130 } 131 return (0); 132 } 133 #endif 134 135 static device_method_t rockchip_dwmmc_methods[] = { 136 /* bus interface */ 137 DEVMETHOD(device_probe, rockchip_dwmmc_probe), 138 DEVMETHOD(device_attach, rockchip_dwmmc_attach), 139 DEVMETHOD(device_detach, dwmmc_detach), 140 141 DEVMETHOD_END 142 }; 143 144 static devclass_t rockchip_dwmmc_devclass; 145 146 DEFINE_CLASS_1(rockchip_dwmmc, rockchip_dwmmc_driver, rockchip_dwmmc_methods, 147 sizeof(struct dwmmc_softc), dwmmc_driver); 148 149 DRIVER_MODULE(rockchip_dwmmc, simplebus, rockchip_dwmmc_driver, 150 rockchip_dwmmc_devclass, 0, 0); 151 DRIVER_MODULE(rockchip_dwmmc, ofwbus, rockchip_dwmmc_driver, 152 rockchip_dwmmc_devclass, NULL, NULL); 153 #ifndef MMCCAM 154 MMC_DECLARE_BRIDGE(rockchip_dwmmc); 155 #endif 156