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/*
* 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/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/mmc/mmc_fdt_helpers.h>
#include <dev/ofw/ofw_bus_subr.h>
#include <dev/extres/clk/clk.h>
#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->update_ios = &dwmmc_rockchip_update_ios;
return (dwmmc_attach(dev));
}
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);
}
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
};
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, 0, 0);
DRIVER_MODULE(rockchip_dwmmc, ofwbus, rockchip_dwmmc_driver, NULL, NULL);
#ifndef MMCCAM
MMC_DECLARE_BRIDGE(rockchip_dwmmc);
#endif
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