1 /* 2 * Copyright 2019 Emmanuel Vadot <manu@freebsd.org> 3 * Copyright (c) 2017 Ian Lepore <ian@freebsd.org> 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/param.h> 29 #include <sys/bus.h> 30 #include <sys/kernel.h> 31 #include <sys/gpio.h> 32 #include <sys/taskqueue.h> 33 34 #include <dev/mmc/bridge.h> 35 #include <dev/mmc/mmc_helpers.h> 36 37 static inline void 38 mmc_parse_sd_speed(device_t dev, struct mmc_host *host) 39 { 40 bool no_18v = false; 41 42 /* 43 * Parse SD supported modes 44 * All UHS-I modes requires 1.8V signaling. 45 */ 46 if (device_has_property(dev, "no-1-8-v")) 47 no_18v = true; 48 if (device_has_property(dev, "cap-sd-highspeed")) 49 host->caps |= MMC_CAP_HSPEED; 50 if (device_has_property(dev, "sd-uhs-sdr12") && !no_18v) 51 host->caps |= MMC_CAP_UHS_SDR12 | MMC_CAP_SIGNALING_180; 52 if (device_has_property(dev, "sd-uhs-sdr25") && !no_18v) 53 host->caps |= MMC_CAP_UHS_SDR25 | MMC_CAP_SIGNALING_180; 54 if (device_has_property(dev, "sd-uhs-sdr50") && !no_18v) 55 host->caps |= MMC_CAP_UHS_SDR50 | MMC_CAP_SIGNALING_180; 56 if (device_has_property(dev, "sd-uhs-sdr104") && !no_18v) 57 host->caps |= MMC_CAP_UHS_SDR104 | MMC_CAP_SIGNALING_180; 58 if (device_has_property(dev, "sd-uhs-ddr50") && !no_18v) 59 host->caps |= MMC_CAP_UHS_DDR50 | MMC_CAP_SIGNALING_180; 60 } 61 62 static inline void 63 mmc_parse_mmc_speed(device_t dev, struct mmc_host *host) 64 { 65 /* Parse eMMC supported modes */ 66 if (device_has_property(dev, "cap-mmc-highspeed")) 67 host->caps |= MMC_CAP_HSPEED; 68 if (device_has_property(dev, "mmc-ddr-1_2v")) 69 host->caps |= MMC_CAP_MMC_DDR52_120 | MMC_CAP_SIGNALING_120; 70 if (device_has_property(dev, "mmc-ddr-1_8v")) 71 host->caps |= MMC_CAP_MMC_DDR52_180 | MMC_CAP_SIGNALING_180; 72 if (device_has_property(dev, "mmc-ddr-3_3v")) 73 host->caps |= MMC_CAP_SIGNALING_330; 74 if (device_has_property(dev, "mmc-hs200-1_2v")) 75 host->caps |= MMC_CAP_MMC_HS200_120 | MMC_CAP_SIGNALING_120; 76 if (device_has_property(dev, "mmc-hs200-1_8v")) 77 host->caps |= MMC_CAP_MMC_HS200_180 | MMC_CAP_SIGNALING_180; 78 if (device_has_property(dev, "mmc-hs400-1_2v")) 79 host->caps |= MMC_CAP_MMC_HS400_120 | MMC_CAP_SIGNALING_120; 80 if (device_has_property(dev, "mmc-hs400-1_8v")) 81 host->caps |= MMC_CAP_MMC_HS400_180 | MMC_CAP_SIGNALING_180; 82 if (device_has_property(dev, "mmc-hs400-enhanced-strobe")) 83 host->caps |= MMC_CAP_MMC_ENH_STROBE; 84 } 85 86 int 87 mmc_parse(device_t dev, struct mmc_helper *helper, struct mmc_host *host) 88 { 89 uint32_t bus_width, max_freq; 90 91 bus_width = 0; 92 if (device_get_property(dev, "bus-width", &bus_width, 93 sizeof(bus_width), DEVICE_PROP_UINT32) <= 0) 94 bus_width = 1; 95 96 if (bus_width >= 4) 97 host->caps |= MMC_CAP_4_BIT_DATA; 98 if (bus_width >= 8) 99 host->caps |= MMC_CAP_8_BIT_DATA; 100 101 /* 102 * max-frequency is optional, drivers should tweak this value 103 * if it's not present based on the clock that the mmc controller 104 * operates on 105 */ 106 if (device_get_property(dev, "max-frequency", &max_freq, 107 sizeof(max_freq), DEVICE_PROP_UINT32) > 0) 108 host->f_max = max_freq; 109 110 if (device_has_property(dev, "broken-cd")) 111 helper->props |= MMC_PROP_BROKEN_CD; 112 if (device_has_property(dev, "non-removable")) 113 helper->props |= MMC_PROP_NON_REMOVABLE; 114 if (device_has_property(dev, "wp-inverted")) 115 helper->props |= MMC_PROP_WP_INVERTED; 116 if (device_has_property(dev, "cd-inverted")) 117 helper->props |= MMC_PROP_CD_INVERTED; 118 if (device_has_property(dev, "no-sdio")) 119 helper->props |= MMC_PROP_NO_SDIO; 120 if (device_has_property(dev, "no-sd")) 121 helper->props |= MMC_PROP_NO_SD; 122 if (device_has_property(dev, "no-mmc")) 123 helper->props |= MMC_PROP_NO_MMC; 124 125 if (!(helper->props & MMC_PROP_NO_SD)) 126 mmc_parse_sd_speed(dev, host); 127 128 if (!(helper->props & MMC_PROP_NO_MMC)) 129 mmc_parse_mmc_speed(dev, host); 130 131 return (0); 132 } 133