/* $NetBSD: usbnopphy.c,v 1.2 2021/01/27 03:10:21 thorpej Exp $ */
/*-
* Copyright (c) 2019 Jared McNeill <
[email protected]>
* 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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>
__KERNEL_RCSID(0, "$NetBSD: usbnopphy.c,v 1.2 2021/01/27 03:10:21 thorpej Exp $");
#include <sys/param.h>
#include <sys/bus.h>
#include <sys/device.h>
#include <sys/intr.h>
#include <sys/systm.h>
#include <sys/time.h>
#include <dev/fdt/fdtvar.h>
static int usbnopphy_match(device_t, cfdata_t, void *);
static void usbnopphy_attach(device_t, device_t, void *);
static const struct device_compatible_entry compat_data[] = {
{ .compat = "usb-nop-xceiv" },
DEVICE_COMPAT_EOL
};
struct usbnopphy_softc {
device_t sc_dev;
struct clk *sc_clk;
struct fdtbus_regulator *sc_reg;
struct fdtbus_gpio_pin *sc_pin_reset;
struct fdtbus_gpio_pin *sc_pin_vbus_det;
};
CFATTACH_DECL_NEW(usbnopphy, sizeof(struct usbnopphy_softc),
usbnopphy_match, usbnopphy_attach, NULL, NULL);
static void *
usbnopphy_acquire(device_t dev, const void *data, size_t len)
{
struct usbnopphy_softc * const sc = device_private(dev);
return sc;
}
static void
usbnopphy_release(device_t dev, void *priv)
{
}
static int
usbnopphy_enable(device_t dev, void *priv, bool enable)
{
struct usbnopphy_softc * const sc = device_private(dev);
int error;
if (enable) {
if (sc->sc_reg != NULL) {
error = fdtbus_regulator_enable(sc->sc_reg);
if (error != 0)
return error;
}
if (sc->sc_clk != NULL) {
error = clk_enable(sc->sc_clk);
if (error != 0)
return error;
}
if (sc->sc_pin_reset != NULL) {
fdtbus_gpio_write(sc->sc_pin_reset, 1);
delay(20000);
fdtbus_gpio_write(sc->sc_pin_reset, 0);
}
} else {
if (sc->sc_pin_reset != NULL)
fdtbus_gpio_write(sc->sc_pin_reset, 1);
if (sc->sc_reg != NULL)
fdtbus_regulator_disable(sc->sc_reg);
if (sc->sc_clk != NULL)
clk_disable(sc->sc_clk);
}
return 0;
}
const struct fdtbus_phy_controller_func usbnopphy_funcs = {
.acquire = usbnopphy_acquire,
.release = usbnopphy_release,
.enable = usbnopphy_enable,
};
static int
usbnopphy_match(device_t parent, cfdata_t cf, void *aux)
{
struct fdt_attach_args * const faa = aux;
return of_compatible_match(faa->faa_phandle, compat_data);
}
static void
usbnopphy_attach(device_t parent, device_t self, void *aux)
{
struct usbnopphy_softc * const sc = device_private(self);
struct fdt_attach_args * const faa = aux;
const int phandle = faa->faa_phandle;
sc->sc_dev = self;
sc->sc_reg = fdtbus_regulator_acquire(phandle, "vbus-regulator");
sc->sc_clk = fdtbus_clock_get(phandle, "main_clk");
sc->sc_pin_reset = fdtbus_gpio_acquire(phandle, "reset-gpios", GPIO_PIN_OUTPUT);
aprint_naive("\n");
aprint_normal(": USB PHY\n");
fdtbus_register_phy_controller(self, phandle, &usbnopphy_funcs);
}
