freebsd-dev/sys/mips/ingenic/jz4780_ohci.c

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/*-
* Copyright (c) 2015, Alexander Kabaev <kan@FreeBSD.org>
* Copyright (c) 2009, Oleksandr Tymoshenko <gonzo@FreeBSD.org>
* 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 unmodified, 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/systm.h>
#include <sys/bus.h>
#include <sys/rman.h>
#include <sys/condvar.h>
#include <sys/kernel.h>
#include <sys/module.h>
#include <sys/gpio.h>
#include <dev/extres/clk/clk.h>
#include <dev/usb/usb.h>
#include <dev/usb/usbdi.h>
#include <dev/usb/usb_core.h>
#include <dev/usb/usb_busdma.h>
#include <dev/usb/usb_process.h>
#include <dev/usb/usb_util.h>
#include <dev/usb/usb_controller.h>
#include <dev/usb/usb_bus.h>
#include <dev/usb/controller/ohci.h>
#include <dev/usb/controller/ohcireg.h>
#include <dev/ofw/ofw_bus.h>
#include <dev/ofw/ofw_bus_subr.h>
#include <dev/gpio/gpiobusvar.h>
#include <mips/ingenic/jz4780_clock.h>
#include <mips/ingenic/jz4780_regs.h>
static int jz4780_ohci_attach(device_t dev);
static int jz4780_ohci_detach(device_t dev);
static int jz4780_ohci_probe(device_t dev);
struct jz4780_ohci_softc
{
struct ohci_softc sc_ohci;
struct gpiobus_pin *gpio_vbus;
clk_t clk;
};
static int
jz4780_ohci_probe(device_t dev)
{
if (!ofw_bus_status_okay(dev))
return (ENXIO);
if (!ofw_bus_is_compatible(dev, "ingenic,jz4780-ohci"))
return (ENXIO);
device_set_desc(dev, "Ingenic JZ4780 OHCI");
return (BUS_PROBE_DEFAULT);
}
static int
jz4780_ohci_vbus_gpio_enable(device_t dev, struct jz4780_ohci_softc *sc)
{
struct gpiobus_pin *gpio_vbus;
int error;
error = ofw_gpiobus_parse_gpios(dev, "ingenic,vbus-gpio", &gpio_vbus);
/*
* The pin can be mapped already by other device. Assume it also has need
* activated and proceed happily.
*/
if (error <= 0)
return (0);
sc->gpio_vbus = gpio_vbus;
if (error > 1) {
device_printf(dev, "too many vbus gpios\n");
return (ENXIO);
}
if (sc->gpio_vbus != NULL) {
error = GPIO_PIN_SET(sc->gpio_vbus->dev, sc->gpio_vbus->pin, 1);
if (error != 0) {
device_printf(dev, "Cannot configure GPIO pin %d on %s\n",
sc->gpio_vbus->pin, device_get_nameunit(sc->gpio_vbus->dev));
return (error);
}
error = GPIO_PIN_SETFLAGS(sc->gpio_vbus->dev, sc->gpio_vbus->pin,
GPIO_PIN_OUTPUT);
if (error != 0) {
device_printf(dev, "Cannot configure GPIO pin %d on %s\n",
sc->gpio_vbus->pin, device_get_nameunit(sc->gpio_vbus->dev));
return (error);
}
}
return (0);
}
static int
jz4780_ohci_clk_enable(device_t dev)
{
struct jz4780_ohci_softc *sc;
int err;
sc = device_get_softc(dev);
err = clk_get_by_ofw_index(dev, 0, 0, &sc->clk);
if (err != 0) {
device_printf(dev, "unable to lookup device clock\n");
return (err);
}
err = clk_enable(sc->clk);
if (err != 0) {
device_printf(dev, "unable to enable device clock\n");
return (err);
}
err = clk_set_freq(sc->clk, 48000000, 0);
if (err != 0) {
device_printf(dev, "unable to set device clock to 48 kHZ\n");
return (err);
}
return (0);
}
static int
jz4780_ohci_attach(device_t dev)
{
struct jz4780_ohci_softc *sc = device_get_softc(dev);
int err;
int rid;
/* initialize some bus fields */
sc->sc_ohci.sc_bus.parent = dev;
sc->sc_ohci.sc_bus.devices = sc->sc_ohci.sc_devices;
sc->sc_ohci.sc_bus.devices_max = OHCI_MAX_DEVICES;
sc->sc_ohci.sc_bus.dma_bits = 32;
/* get all DMA memory */
if (usb_bus_mem_alloc_all(&sc->sc_ohci.sc_bus,
USB_GET_DMA_TAG(dev), &ohci_iterate_hw_softc)) {
return (ENOMEM);
}
sc->sc_ohci.sc_dev = dev;
/* frob vbus gpio */
err = jz4780_ohci_vbus_gpio_enable(dev, sc);
if (err)
goto error;
err = jz4780_ohci_clk_enable(dev);
if (err)
goto error;
rid = 0;
sc->sc_ohci.sc_io_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid,
RF_ACTIVE);
if (sc->sc_ohci.sc_io_res == NULL) {
err = ENOMEM;
goto error;
}
sc->sc_ohci.sc_io_tag = rman_get_bustag(sc->sc_ohci.sc_io_res);
sc->sc_ohci.sc_io_hdl = rman_get_bushandle(sc->sc_ohci.sc_io_res);
sc->sc_ohci.sc_io_size = rman_get_size(sc->sc_ohci.sc_io_res);
rid = 0;
sc->sc_ohci.sc_irq_res = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid,
RF_ACTIVE);
if (sc->sc_ohci.sc_irq_res == NULL) {
err = ENOMEM;
goto error;
}
if (jz4780_ohci_enable() != 0) {
device_printf(dev, "CGU failed to enable OHCI\n");
err = ENXIO;
goto error;
}
sc->sc_ohci.sc_bus.bdev = device_add_child(dev, "usbus", -1);
if (sc->sc_ohci.sc_bus.bdev == NULL) {
err = ENOMEM;
goto error;
}
device_set_ivars(sc->sc_ohci.sc_bus.bdev, &sc->sc_ohci.sc_bus);
err = bus_setup_intr(dev, sc->sc_ohci.sc_irq_res,
INTR_TYPE_BIO | INTR_MPSAFE, NULL,
(driver_intr_t *)ohci_interrupt, sc, &sc->sc_ohci.sc_intr_hdl);
if (err) {
err = ENXIO;
goto error;
}
strlcpy(sc->sc_ohci.sc_vendor, "Ingenic", sizeof(sc->sc_ohci.sc_vendor));
bus_space_write_4(sc->sc_ohci.sc_io_tag, sc->sc_ohci.sc_io_hdl, OHCI_CONTROL, 0);
err = ohci_init(&sc->sc_ohci);
if (!err)
err = device_probe_and_attach(sc->sc_ohci.sc_bus.bdev);
if (err)
goto error;
return (0);
error:
if (err)
jz4780_ohci_detach(dev);
return (err);
}
static int
jz4780_ohci_detach(device_t dev)
{
struct jz4780_ohci_softc *sc = device_get_softc(dev);
device_t bdev;
if (sc->sc_ohci.sc_bus.bdev) {
bdev = sc->sc_ohci.sc_bus.bdev;
device_detach(bdev);
device_delete_child(dev, bdev);
}
/* during module unload there are lots of children leftover */
device_delete_children(dev);
/*
* Put the controller into reset, then disable clocks and do
* the MI tear down. We have to disable the clocks/hardware
* after we do the rest of the teardown. We also disable the
* clocks in the opposite order we acquire them, but that
* doesn't seem to be absolutely necessary. We free up the
* clocks after we disable them, so the system could, in
* theory, reuse them.
*/
if (sc->sc_ohci.sc_io_res != NULL) {
bus_space_write_4(sc->sc_ohci.sc_io_tag, sc->sc_ohci.sc_io_hdl,
OHCI_CONTROL, 0);
}
if (sc->sc_ohci.sc_intr_hdl) {
bus_teardown_intr(dev, sc->sc_ohci.sc_irq_res, sc->sc_ohci.sc_intr_hdl);
sc->sc_ohci.sc_intr_hdl = NULL;
}
if (sc->sc_ohci.sc_irq_res && sc->sc_ohci.sc_intr_hdl) {
/*
* only call ohci_detach() after ohci_init()
*/
ohci_detach(&sc->sc_ohci);
bus_release_resource(dev, SYS_RES_IRQ, 0, sc->sc_ohci.sc_irq_res);
sc->sc_ohci.sc_irq_res = NULL;
}
if (sc->sc_ohci.sc_io_res) {
bus_release_resource(dev, SYS_RES_MEMORY, 0, sc->sc_ohci.sc_io_res);
sc->sc_ohci.sc_io_res = NULL;
sc->sc_ohci.sc_io_tag = 0;
sc->sc_ohci.sc_io_hdl = 0;
}
if (sc->clk != NULL)
clk_release(sc->clk);
usb_bus_mem_free_all(&sc->sc_ohci.sc_bus, &ohci_iterate_hw_softc);
free(sc->gpio_vbus, M_DEVBUF);
return (0);
}
static device_method_t ohci_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, jz4780_ohci_probe),
DEVMETHOD(device_attach, jz4780_ohci_attach),
DEVMETHOD(device_detach, jz4780_ohci_detach),
DEVMETHOD(device_suspend, bus_generic_suspend),
DEVMETHOD(device_resume, bus_generic_resume),
DEVMETHOD(device_shutdown, bus_generic_shutdown),
DEVMETHOD_END
};
static driver_t ohci_driver = {
.name = "ohci",
.methods = ohci_methods,
.size = sizeof(struct jz4780_ohci_softc),
};
static devclass_t ohci_devclass;
DRIVER_MODULE(ohci, simplebus, ohci_driver, ohci_devclass, 0, 0);