1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (c) 2025 Bojan Novković <bnovkov@FreeBSD.org> 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 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 ``AS IS'' AND ANY EXPRESS OR 16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 */ 26 27 #include <sys/param.h> 28 #include <sys/bus.h> 29 #include <sys/kernel.h> 30 #include <sys/types.h> 31 #include <sys/taskqueue.h> 32 #include <sys/module.h> 33 34 #include <machine/bus.h> 35 36 #include <dev/ofw/ofw_bus.h> 37 #include <dev/ofw/ofw_bus_subr.h> 38 #include <dev/ofw/ofw_subr.h> 39 #include <dev/clk/clk.h> 40 #include <dev/clk/clk_fixed.h> 41 #include <dev/ofw/openfirm.h> 42 #include <dev/syscon/syscon.h> 43 44 #include <dev/phy/phy.h> 45 #include <dev/mmc/bridge.h> 46 #include <dev/mmc/mmcbrvar.h> 47 #include <dev/mmc/mmcreg.h> 48 49 #include <dev/fdt/fdt_common.h> 50 #include <dev/mmc/mmc_fdt_helpers.h> 51 52 #include <dev/sdhci/sdhci.h> 53 #include <dev/sdhci/sdhci_fdt_gpio.h> 54 #include <dev/sdhci/sdhci_fdt.h> 55 56 #include "syscon_if.h" 57 #include "mmcbr_if.h" 58 #include "sdhci_if.h" 59 60 #include "opt_mmccam.h" 61 #include "opt_soc.h" 62 63 #define CV181X_SYSCTRL_SD_PWRSW_CTRL 0x1F4 64 #define SD_PWRSW_CTRL_RESET_MASK 0x9 65 #define CVI_CV181X_SDHCI_VENDOR_OFFSET 0x200 66 #define CVI_CV181X_SDHCI_EMMC_CTRL (CVI_CV181X_SDHCI_VENDOR_OFFSET + 0x0) 67 #define EMMC_CTRL_RESET_MASK 0x302 68 #define CVI_CV181X_SDHCI_PHY_TX_RX_DLY (CVI_CV181X_SDHCI_VENDOR_OFFSET + 0x40) 69 #define PHY_TX_RX_DLY_RESET_MASK 0x1000100 70 #define CVI_CV181X_SDHCI_PHY_CONFIG (CVI_CV181X_SDHCI_VENDOR_OFFSET + 0x4C) 71 #define PHY_CONFIG_RESET_MASK 0x1 72 73 #define SDHCI_FDT_CVITEK_CV181X_SD 1 74 75 static struct ofw_compat_data compat_data[] = { 76 { "cvitek,cv181x-sd", SDHCI_FDT_CVITEK_CV181X_SD }, 77 { NULL, 0 } 78 }; 79 80 static int 81 sdhci_fdt_cvitek_probe(device_t dev) 82 { 83 if (!ofw_bus_status_okay(dev)) 84 return (ENXIO); 85 86 if (ofw_bus_search_compatible(dev, compat_data)->ocd_data == 0) 87 return (ENXIO); 88 89 device_set_desc(dev, "Cvitek CV181x SDHCI controller"); 90 return (BUS_PROBE_SPECIFIC); 91 } 92 93 static int 94 sdhci_fdt_cvitek_attach(device_t dev) 95 { 96 int error; 97 uint32_t reg; 98 phandle_t node; 99 struct resource *res; 100 struct syscon *syscon; 101 struct sdhci_fdt_softc *sc = device_get_softc(dev); 102 103 if (sdhci_fdt_attach(dev)) 104 return (ENXIO); 105 106 res = sc->mem_res[0]; 107 node = ofw_bus_find_compatible(OF_finddevice("/"), "syscon"); 108 error = syscon_get_by_ofw_node(dev, node, &syscon); 109 if (error != 0) { 110 device_printf(dev, "Couldn't get syscon handle\n"); 111 return (error); 112 } 113 114 SYSCON_WRITE_4(syscon, CV181X_SYSCTRL_SD_PWRSW_CTRL, 115 SD_PWRSW_CTRL_RESET_MASK); 116 DELAY(1000); 117 118 reg = bus_read_4(res, CVI_CV181X_SDHCI_EMMC_CTRL); 119 reg |= EMMC_CTRL_RESET_MASK; 120 bus_write_4(res, CVI_CV181X_SDHCI_EMMC_CTRL, reg); 121 bus_write_4(res, CVI_CV181X_SDHCI_PHY_TX_RX_DLY, 122 PHY_TX_RX_DLY_RESET_MASK); 123 bus_write_4(res, CVI_CV181X_SDHCI_PHY_CONFIG, 124 PHY_CONFIG_RESET_MASK); 125 126 return (0); 127 } 128 129 static device_method_t sdhci_fdt_cvitek_methods[] = { 130 /* device_if */ 131 DEVMETHOD(device_probe, sdhci_fdt_cvitek_probe), 132 DEVMETHOD(device_attach, sdhci_fdt_cvitek_attach), 133 134 DEVMETHOD_END 135 }; 136 extern driver_t sdhci_fdt_driver; 137 138 DEFINE_CLASS_1(sdhci_cvitek, sdhci_fdt_cvitek_driver, sdhci_fdt_cvitek_methods, 139 sizeof(struct sdhci_fdt_softc), sdhci_fdt_driver); 140 DRIVER_MODULE(sdhci_cvitek, simplebus, sdhci_fdt_cvitek_driver, NULL, NULL); 141 142 #ifndef MMCCAM 143 MMC_DECLARE_BRIDGE(sdhci_fdt_cvitek); 144 #endif 145