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
155 lines
3.9 KiB
C
155 lines
3.9 KiB
C
/*
|
|
* Copyright 2017 Emmanuel Vadot <manu@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 AND CONTRIBUTORS ``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 OR CONTRIBUTORS 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/kernel.h>
|
|
#include <sys/bus.h>
|
|
#include <sys/module.h>
|
|
#include <sys/queue.h>
|
|
#include <sys/taskqueue.h>
|
|
|
|
#include <machine/bus.h>
|
|
|
|
#include <dev/mmc/bridge.h>
|
|
|
|
#include <dev/ofw/ofw_bus_subr.h>
|
|
|
|
#ifdef EXT_RESOURCES
|
|
#include <dev/extres/clk/clk.h>
|
|
#endif
|
|
|
|
#include <dev/mmc/host/dwmmc_var.h>
|
|
|
|
#include "opt_mmccam.h"
|
|
|
|
enum RKTYPE {
|
|
RK2928 = 1,
|
|
RK3288,
|
|
};
|
|
|
|
static struct ofw_compat_data compat_data[] = {
|
|
{"rockchip,rk2928-dw-mshc", RK2928},
|
|
{"rockchip,rk3288-dw-mshc", RK3288},
|
|
{NULL, 0},
|
|
};
|
|
|
|
static int dwmmc_rockchip_update_ios(struct dwmmc_softc *sc, struct mmc_ios *ios);
|
|
|
|
static int
|
|
rockchip_dwmmc_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, "Synopsys DesignWare Mobile "
|
|
"Storage Host Controller (RockChip)");
|
|
|
|
return (BUS_PROBE_VENDOR);
|
|
}
|
|
|
|
static int
|
|
rockchip_dwmmc_attach(device_t dev)
|
|
{
|
|
struct dwmmc_softc *sc;
|
|
int type;
|
|
|
|
sc = device_get_softc(dev);
|
|
sc->hwtype = HWTYPE_ROCKCHIP;
|
|
type = ofw_bus_search_compatible(dev, compat_data)->ocd_data;
|
|
|
|
switch (type) {
|
|
case RK2928:
|
|
sc->use_pio = 1;
|
|
break;
|
|
}
|
|
|
|
sc->pwren_inverted = 1;
|
|
|
|
#ifdef EXT_RESOURCES
|
|
sc->update_ios = &dwmmc_rockchip_update_ios;
|
|
#endif
|
|
|
|
return (dwmmc_attach(dev));
|
|
}
|
|
|
|
#ifdef EXT_RESOURCES
|
|
static int
|
|
dwmmc_rockchip_update_ios(struct dwmmc_softc *sc, struct mmc_ios *ios)
|
|
{
|
|
unsigned int clock;
|
|
int error;
|
|
|
|
if (ios->clock && ios->clock != sc->bus_hz) {
|
|
sc->bus_hz = clock = ios->clock;
|
|
/* Set the MMC clock. */
|
|
if (sc->ciu) {
|
|
/*
|
|
* Apparently you need to set the ciu clock to
|
|
* the double of bus_hz
|
|
*/
|
|
error = clk_set_freq(sc->ciu, clock * 2,
|
|
CLK_SET_ROUND_DOWN);
|
|
if (error != 0) {
|
|
device_printf(sc->dev,
|
|
"failed to set frequency to %u Hz: %d\n",
|
|
clock, error);
|
|
return (error);
|
|
}
|
|
}
|
|
}
|
|
return (0);
|
|
}
|
|
#endif
|
|
|
|
static device_method_t rockchip_dwmmc_methods[] = {
|
|
/* bus interface */
|
|
DEVMETHOD(device_probe, rockchip_dwmmc_probe),
|
|
DEVMETHOD(device_attach, rockchip_dwmmc_attach),
|
|
DEVMETHOD(device_detach, dwmmc_detach),
|
|
|
|
DEVMETHOD_END
|
|
};
|
|
|
|
static devclass_t rockchip_dwmmc_devclass;
|
|
|
|
DEFINE_CLASS_1(rockchip_dwmmc, rockchip_dwmmc_driver, rockchip_dwmmc_methods,
|
|
sizeof(struct dwmmc_softc), dwmmc_driver);
|
|
|
|
DRIVER_MODULE(rockchip_dwmmc, simplebus, rockchip_dwmmc_driver,
|
|
rockchip_dwmmc_devclass, 0, 0);
|
|
DRIVER_MODULE(rockchip_dwmmc, ofwbus, rockchip_dwmmc_driver,
|
|
rockchip_dwmmc_devclass, NULL, NULL);
|
|
#ifndef MMCCAM
|
|
MMC_DECLARE_BRIDGE(rockchip_dwmmc);
|
|
#endif
|