FreeBSD/Linux Kernel Cross Reference
sys/dev/sdhci/sdhci_xenon_fdt.c

     /*-
      * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
      *
      * Copyright (c) 2021 Semihalf
      *
      * 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/cdefs.h>
    __FBSDID("$FreeBSD$");
    
    #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/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_xenon.h>
    
    #include "mmcbr_if.h"
    #include "sdhci_if.h"
    
    #include "opt_mmccam.h"
    #include "opt_soc.h"
    
    static struct ofw_compat_data compat_data[] = {
            { "marvell,armada-3700-sdhci",  1 },
    #ifdef SOC_MARVELL_8K
            { "marvell,armada-cp110-sdhci", 1 },
            { "marvell,armada-ap806-sdhci", 1 },
            { "marvell,armada-ap807-sdhci", 1 },
    #endif
            { NULL, 0 }
    };
    
    static bool
    sdhci_xenon_fdt_get_card_present(device_t dev, struct sdhci_slot *slot)
    {
            struct sdhci_xenon_softc *sc;
    
            sc = device_get_softc(dev);
    
            return (sdhci_fdt_gpio_get_present(sc->gpio));
    }
    
    static int
    sdhci_xenon_fdt_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, "Armada Xenon SDHCI controller");
    
            return (BUS_PROBE_SPECIFIC);
    }
    
    static void
    sdhci_xenon_fdt_parse(device_t dev, struct sdhci_slot *slot)
    {
            struct sdhci_xenon_softc *sc;
            struct mmc_helper mmc_helper;
    
           sc = device_get_softc(dev);
           memset(&mmc_helper, 0, sizeof(mmc_helper));
   
           /* MMC helper for parsing FDT */
           mmc_fdt_parse(dev, 0, &mmc_helper, &slot->host);
   
           sc->skip_regulators = false;
           sc->vmmc_supply = mmc_helper.vmmc_supply;
           sc->vqmmc_supply = mmc_helper.vqmmc_supply;
           sc->wp_inverted = mmc_helper.props & MMC_PROP_WP_INVERTED;
   
           /* Check if the device is flagged as non-removable. */
           if (mmc_helper.props & MMC_PROP_NON_REMOVABLE) {
                   slot->opt |= SDHCI_NON_REMOVABLE;
                   if (bootverbose)
                           device_printf(dev, "Non-removable media\n");
           }
   }
   
   static int
   sdhci_xenon_fdt_attach(device_t dev)
   {
           struct sdhci_xenon_softc *sc;
           struct sdhci_slot *slot;
   
           sc = device_get_softc(dev);
           slot = malloc(sizeof(*slot), M_DEVBUF, M_ZERO | M_WAITOK);
   
           sdhci_xenon_fdt_parse(dev, slot);
   
           /*
            * Set up any gpio pin handling described in the FDT data. This cannot
            * fail; see comments in sdhci_fdt_gpio.h for details.
            */
           sc->gpio = sdhci_fdt_gpio_setup(dev, slot);
           sc->slot = slot;
   
           return (sdhci_xenon_attach(dev));
   }
   
   static int
   sdhci_xenon_fdt_detach(device_t dev)
   {
           struct sdhci_xenon_softc *sc;
   
           sc = device_get_softc(dev);
           if (sc->gpio != NULL)
                   sdhci_fdt_gpio_teardown(sc->gpio);
   
           return (sdhci_xenon_detach(dev));
   }
   
   static device_method_t sdhci_xenon_fdt_methods[] = {
           /* device_if */
           DEVMETHOD(device_probe,         sdhci_xenon_fdt_probe),
           DEVMETHOD(device_attach,        sdhci_xenon_fdt_attach),
           DEVMETHOD(device_detach,        sdhci_xenon_fdt_detach),
   
           DEVMETHOD(sdhci_get_card_present, sdhci_xenon_fdt_get_card_present),
   
           DEVMETHOD_END
   };
   
   DEFINE_CLASS_1(sdhci_xenon, sdhci_xenon_fdt_driver, sdhci_xenon_fdt_methods,
       sizeof(struct sdhci_xenon_softc), sdhci_xenon_driver);
   
   DRIVER_MODULE(sdhci_xenon, simplebus, sdhci_xenon_fdt_driver, NULL, NULL);
   
   #ifndef MMCCAM
   MMC_DECLARE_BRIDGE(sdhci_xenon_fdt);
   #endif

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