1/* 2 * Copyright 2017 Emmanuel Vadot <manu@freebsd.org> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions are 7 * met: 8 * 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 18 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE 19 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 20 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 21 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR 22 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 23 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 24 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 25 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 */ 27 28#include <sys/cdefs.h> 29__FBSDID("$FreeBSD$"); 30 31#include <sys/param.h> 32#include <sys/kernel.h> 33#include <sys/bus.h> 34#include <sys/module.h> 35#include <sys/queue.h> 36#include <sys/taskqueue.h> 37 38#include <machine/bus.h> 39 40#include <dev/mmc/bridge.h> 41#include <dev/mmc/mmc_fdt_helpers.h> 42 43#include <dev/ofw/ofw_bus_subr.h> 44 45#ifdef EXT_RESOURCES 46#include <dev/extres/clk/clk.h> 47#endif 48 49#include <dev/mmc/host/dwmmc_var.h> 50 51#include "opt_mmccam.h" 52 53enum RKTYPE { 54 RK2928 = 1, 55 RK3288, 56}; 57 58static struct ofw_compat_data compat_data[] = { 59 {"rockchip,rk2928-dw-mshc", RK2928}, 60 {"rockchip,rk3288-dw-mshc", RK3288}, 61 {NULL, 0}, 62}; 63 64static int dwmmc_rockchip_update_ios(struct dwmmc_softc *sc, struct mmc_ios *ios); 65 66static int 67rockchip_dwmmc_probe(device_t dev) 68{ 69 70 if (!ofw_bus_status_okay(dev)) 71 return (ENXIO); 72 73 if (ofw_bus_search_compatible(dev, compat_data)->ocd_data == 0) 74 return (ENXIO); 75 76 device_set_desc(dev, "Synopsys DesignWare Mobile " 77 "Storage Host Controller (RockChip)"); 78 79 return (BUS_PROBE_VENDOR); 80} 81 82static int 83rockchip_dwmmc_attach(device_t dev) 84{ 85 struct dwmmc_softc *sc; 86 int type; 87 88 sc = device_get_softc(dev); 89 sc->hwtype = HWTYPE_ROCKCHIP; 90 type = ofw_bus_search_compatible(dev, compat_data)->ocd_data; 91 92 switch (type) { 93 case RK2928: 94 sc->use_pio = 1; 95 break; 96 } 97 98 sc->pwren_inverted = 1; 99 100#ifdef EXT_RESOURCES 101 sc->update_ios = &dwmmc_rockchip_update_ios; 102#endif 103 104 return (dwmmc_attach(dev)); 105} 106 107#ifdef EXT_RESOURCES 108static int 109dwmmc_rockchip_update_ios(struct dwmmc_softc *sc, struct mmc_ios *ios) 110{ 111 unsigned int clock; 112 int error; 113 114 if (ios->clock && ios->clock != sc->bus_hz) { 115 sc->bus_hz = clock = ios->clock; 116 /* Set the MMC clock. */ 117 if (sc->ciu) { 118 /* 119 * Apparently you need to set the ciu clock to 120 * the double of bus_hz 121 */ 122 error = clk_set_freq(sc->ciu, clock * 2, 123 CLK_SET_ROUND_DOWN); 124 if (error != 0) { 125 device_printf(sc->dev, 126 "failed to set frequency to %u Hz: %d\n", 127 clock, error); 128 return (error); 129 } 130 } 131 } 132 return (0); 133} 134#endif 135 136static device_method_t rockchip_dwmmc_methods[] = { 137 /* bus interface */ 138 DEVMETHOD(device_probe, rockchip_dwmmc_probe), 139 DEVMETHOD(device_attach, rockchip_dwmmc_attach), 140 DEVMETHOD(device_detach, dwmmc_detach), 141 142 DEVMETHOD_END 143}; 144 145static devclass_t rockchip_dwmmc_devclass; 146 147DEFINE_CLASS_1(rockchip_dwmmc, rockchip_dwmmc_driver, rockchip_dwmmc_methods, 148 sizeof(struct dwmmc_softc), dwmmc_driver); 149 150DRIVER_MODULE(rockchip_dwmmc, simplebus, rockchip_dwmmc_driver, 151 rockchip_dwmmc_devclass, 0, 0); 152DRIVER_MODULE(rockchip_dwmmc, ofwbus, rockchip_dwmmc_driver, 153 rockchip_dwmmc_devclass, NULL, NULL); 154#ifndef MMCCAM 155MMC_DECLARE_BRIDGE(rockchip_dwmmc); 156#endif 157