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