87d4212b1d
The driver used to always add the mmc device as it's child even it no card was detected. Add a function that will detect if the card is present or not and that will attach/detach the mmc device. The function is either call on attach (as we won't have the interrupt fired) or from two taskqueues. The first taskqueue will directly call the function when the sdcard was present and is now removed and the other one will delay a bit the attach when we didn't had a card and now have one. This is mostly based on comments from the sdhci driver where it describe a situation when the CD pin is detected before the others pins are connected. MFC after: 1 month
107 lines
3.0 KiB
C
107 lines
3.0 KiB
C
/*
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* Copyright 2015 Andrew Turner.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
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* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/kernel.h>
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#include <sys/bus.h>
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#include <sys/module.h>
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#include <sys/queue.h>
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#include <sys/taskqueue.h>
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#include <machine/bus.h>
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#include <dev/mmc/bridge.h>
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#include <dev/ofw/ofw_bus_subr.h>
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#include <dev/mmc/host/dwmmc_var.h>
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#include "opt_mmccam.h"
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static device_probe_t hisi_dwmmc_probe;
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static device_attach_t hisi_dwmmc_attach;
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static int
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hisi_dwmmc_probe(device_t dev)
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{
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if (!ofw_bus_status_okay(dev))
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return (ENXIO);
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if (!ofw_bus_is_compatible(dev, "hisilicon,hi6220-dw-mshc"))
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return (ENXIO);
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device_set_desc(dev, "Synopsys DesignWare Mobile "
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"Storage Host Controller (HiSilicon)");
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return (BUS_PROBE_VENDOR);
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}
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static int
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hisi_dwmmc_attach(device_t dev)
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{
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struct dwmmc_softc *sc;
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sc = device_get_softc(dev);
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sc->hwtype = HWTYPE_HISILICON;
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/* TODO: Calculate this from a clock driver */
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sc->bus_hz = 24000000; /* 24MHz */
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/*
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* ARM64TODO: This is likely because we lack support for
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* DMA when the controller is not cache-coherent on arm64.
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*/
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sc->use_pio = 1;
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sc->desc_count = 1;
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return (dwmmc_attach(dev));
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}
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static device_method_t hisi_dwmmc_methods[] = {
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/* bus interface */
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DEVMETHOD(device_probe, hisi_dwmmc_probe),
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DEVMETHOD(device_attach, hisi_dwmmc_attach),
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DEVMETHOD_END
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};
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static devclass_t hisi_dwmmc_devclass;
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DEFINE_CLASS_1(hisi_dwmmc, hisi_dwmmc_driver, hisi_dwmmc_methods,
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sizeof(struct dwmmc_softc), dwmmc_driver);
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DRIVER_MODULE(hisi_dwmmc, simplebus, hisi_dwmmc_driver,
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hisi_dwmmc_devclass, 0, 0);
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DRIVER_MODULE(hisi_dwmmc, ofwbus, hisi_dwmmc_driver, hisi_dwmmc_devclass
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, NULL, NULL);
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#ifndef MMCCAM
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MMC_DECLARE_BRIDGE(hisi_dwmmc);
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#endif
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