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