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/*-
* Copyright (c) 2016 Jared McNeill <jmcneill@invisible.ca>
* All rights reserved.
*
* 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.
*
* $FreeBSD$
*/
/*
* Allwinner USB PHY
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/bus.h>
#include <sys/rman.h>
#include <sys/kernel.h>
#include <sys/module.h>
#include <sys/gpio.h>
#include <dev/ofw/ofw_bus.h>
#include <dev/ofw/ofw_bus_subr.h>
#include <dev/extres/clk/clk.h>
#include <dev/extres/hwreset/hwreset.h>
#include <dev/extres/regulator/regulator.h>
#define USBPHY_NUMOFF 3
static struct ofw_compat_data compat_data[] = {
{ "allwinner,sun4i-a10-usb-phy", 1 },
{ "allwinner,sun5i-a13-usb-phy", 1 },
{ "allwinner,sun6i-a31-usb-phy", 1 },
{ "allwinner,sun7i-a20-usb-phy", 1 },
{ NULL, 0 }
};
static int
awusbphy_init(device_t dev)
{
char pname[20];
int error, off;
regulator_t reg;
hwreset_t rst;
clk_t clk;
/* Enable clocks */
for (off = 0; clk_get_by_ofw_index(dev, off, &clk) == 0; off++) {
error = clk_enable(clk);
if (error != 0) {
device_printf(dev, "couldn't enable clock %s\n",
clk_get_name(clk));
return (error);
}
}
/* De-assert resets */
for (off = 0; hwreset_get_by_ofw_idx(dev, off, &rst) == 0; off++) {
error = hwreset_deassert(rst);
if (error != 0) {
device_printf(dev, "couldn't de-assert reset %d\n",
off);
return (error);
}
}
/* Enable regulator(s) */
for (off = 0; off < USBPHY_NUMOFF; off++) {
snprintf(pname, sizeof(pname), "usb%d_vbus-supply", off);
if (regulator_get_by_ofw_property(dev, pname, ®) != 0)
continue;
error = regulator_enable(reg);
if (error != 0) {
device_printf(dev, "couldn't enable regulator %s\n",
pname);
return (error);
}
}
return (0);
}
static int
awusbphy_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, "Allwinner USB PHY");
return (BUS_PROBE_DEFAULT);
}
static int
awusbphy_attach(device_t dev)
{
int error;
error = awusbphy_init(dev);
if (error)
device_printf(dev, "failed to initialize USB PHY, error %d\n",
error);
return (error);
}
static device_method_t awusbphy_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, awusbphy_probe),
DEVMETHOD(device_attach, awusbphy_attach),
DEVMETHOD_END
};
static driver_t awusbphy_driver = {
"awusbphy",
awusbphy_methods,
0,
};
static devclass_t awusbphy_devclass;
DRIVER_MODULE(awusbphy, simplebus, awusbphy_driver, awusbphy_devclass, 0, 0);
MODULE_VERSION(awusbphy, 1);
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