diff options
Diffstat (limited to 'sys/dev/sdhci/sdhci_fdt_cvitek.c')
| -rw-r--r-- | sys/dev/sdhci/sdhci_fdt_cvitek.c | 144 |
1 files changed, 144 insertions, 0 deletions
diff --git a/sys/dev/sdhci/sdhci_fdt_cvitek.c b/sys/dev/sdhci/sdhci_fdt_cvitek.c new file mode 100644 index 000000000000..e13e10df0dc2 --- /dev/null +++ b/sys/dev/sdhci/sdhci_fdt_cvitek.c @@ -0,0 +1,144 @@ +/*- + * SPDX-License-Identifier: BSD-2-Clause + * + * Copyright (c) 2025 Bojan Novković <bnovkov@FreeBSD.org> + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES + * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. + * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT + * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF + * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#include <sys/param.h> +#include <sys/bus.h> +#include <sys/kernel.h> +#include <sys/types.h> +#include <sys/taskqueue.h> +#include <sys/module.h> + +#include <machine/bus.h> + +#include <dev/ofw/ofw_bus.h> +#include <dev/ofw/ofw_bus_subr.h> +#include <dev/ofw/ofw_subr.h> +#include <dev/clk/clk.h> +#include <dev/clk/clk_fixed.h> +#include <dev/ofw/openfirm.h> +#include <dev/syscon/syscon.h> + +#include <dev/phy/phy.h> +#include <dev/mmc/bridge.h> +#include <dev/mmc/mmcbrvar.h> +#include <dev/mmc/mmcreg.h> + +#include <dev/fdt/fdt_common.h> +#include <dev/mmc/mmc_fdt_helpers.h> + +#include <dev/sdhci/sdhci.h> +#include <dev/sdhci/sdhci_fdt_gpio.h> +#include <dev/sdhci/sdhci_fdt.h> + +#include "syscon_if.h" +#include "mmcbr_if.h" +#include "sdhci_if.h" + +#include "opt_mmccam.h" +#include "opt_soc.h" + +#define CV181X_SYSCTRL_SD_PWRSW_CTRL 0x1F4 +#define SD_PWRSW_CTRL_RESET_MASK 0x9 +#define CVI_CV181X_SDHCI_VENDOR_OFFSET 0x200 +#define CVI_CV181X_SDHCI_EMMC_CTRL (CVI_CV181X_SDHCI_VENDOR_OFFSET + 0x0) +#define EMMC_CTRL_RESET_MASK 0x302 +#define CVI_CV181X_SDHCI_PHY_TX_RX_DLY (CVI_CV181X_SDHCI_VENDOR_OFFSET + 0x40) +#define PHY_TX_RX_DLY_RESET_MASK 0x1000100 +#define CVI_CV181X_SDHCI_PHY_CONFIG (CVI_CV181X_SDHCI_VENDOR_OFFSET + 0x4C) +#define PHY_CONFIG_RESET_MASK 0x1 + +#define SDHCI_FDT_CVITEK_CV181X_SD 1 + +static struct ofw_compat_data compat_data[] = { + { "cvitek,cv181x-sd", SDHCI_FDT_CVITEK_CV181X_SD }, + { NULL, 0 } +}; + +static int +sdhci_fdt_cvitek_probe(device_t dev) +{ + if (!ofw_bus_status_okay(dev)) + return (ENXIO); + + if (ofw_bus_search_compatible(dev, compat_data)->ocd_data == 0) + return (ENXIO); + + device_set_desc(dev, "Cvitek CV181x SDHCI controller"); + return (BUS_PROBE_SPECIFIC); +} + +static int +sdhci_fdt_cvitek_attach(device_t dev) +{ + int error; + uint32_t reg; + phandle_t node; + struct resource *res; + struct syscon *syscon; + struct sdhci_fdt_softc *sc = device_get_softc(dev); + + if (sdhci_fdt_attach(dev)) + return (ENXIO); + + res = sc->mem_res[0]; + node = ofw_bus_find_compatible(OF_finddevice("/"), "syscon"); + error = syscon_get_by_ofw_node(dev, node, &syscon); + if (error != 0) { + device_printf(dev, "Couldn't get syscon handle\n"); + return (error); + } + + SYSCON_WRITE_4(syscon, CV181X_SYSCTRL_SD_PWRSW_CTRL, + SD_PWRSW_CTRL_RESET_MASK); + DELAY(1000); + + reg = bus_read_4(res, CVI_CV181X_SDHCI_EMMC_CTRL); + reg |= EMMC_CTRL_RESET_MASK; + bus_write_4(res, CVI_CV181X_SDHCI_EMMC_CTRL, reg); + bus_write_4(res, CVI_CV181X_SDHCI_PHY_TX_RX_DLY, + PHY_TX_RX_DLY_RESET_MASK); + bus_write_4(res, CVI_CV181X_SDHCI_PHY_CONFIG, + PHY_CONFIG_RESET_MASK); + + return (0); +} + +static device_method_t sdhci_fdt_cvitek_methods[] = { + /* device_if */ + DEVMETHOD(device_probe, sdhci_fdt_cvitek_probe), + DEVMETHOD(device_attach, sdhci_fdt_cvitek_attach), + + DEVMETHOD_END +}; +extern driver_t sdhci_fdt_driver; + +DEFINE_CLASS_1(sdhci_cvitek, sdhci_fdt_cvitek_driver, sdhci_fdt_cvitek_methods, + sizeof(struct sdhci_fdt_softc), sdhci_fdt_driver); +DRIVER_MODULE(sdhci_cvitek, simplebus, sdhci_fdt_cvitek_driver, NULL, NULL); + +#ifndef MMCCAM +MMC_DECLARE_BRIDGE(sdhci_fdt_cvitek); +#endif |