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#include <machine/rtems-bsd-kernel-space.h>
/*-
* Copyright (c) 2013 Oleksandr Tymoshenko <gonzo@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/stdint.h>
#include <sys/stddef.h>
#include <sys/param.h>
#include <sys/queue.h>
#include <sys/types.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/bus.h>
#include <sys/module.h>
#include <sys/lock.h>
#include <sys/mutex.h>
#include <sys/condvar.h>
#include <sys/sysctl.h>
#include <sys/sx.h>
#include <rtems/bsd/sys/unistd.h>
#include <sys/callout.h>
#include <sys/malloc.h>
#include <sys/priv.h>
#include <dev/fdt/simplebus.h>
#include <dev/ofw/openfirm.h>
#include <dev/ofw/ofw_bus.h>
#include <dev/ofw/ofw_bus_subr.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/musb_otg.h>
#include <dev/usb/usb_debug.h>
#include <sys/rman.h>
#include <arm/ti/ti_prcm.h>
#include <arm/ti/ti_scm.h>
#include <arm/ti/am335x/am335x_scm.h>
#define AM335X_USB_PORTS 2
#define USBSS_REVREG 0x00
#define USBSS_SYSCONFIG 0x10
#define USBSS_SYSCONFIG_SRESET 1
#define USBCTRL_REV 0x00
#define USBCTRL_CTRL 0x14
#define USBCTRL_STAT 0x18
#define USBCTRL_IRQ_STAT0 0x30
#define IRQ_STAT0_RXSHIFT 16
#define IRQ_STAT0_TXSHIFT 0
#define USBCTRL_IRQ_STAT1 0x34
#define IRQ_STAT1_DRVVBUS (1 << 8)
#define USBCTRL_INTEN_SET0 0x38
#define USBCTRL_INTEN_SET1 0x3C
#define USBCTRL_INTEN_USB_ALL 0x1ff
#define USBCTRL_INTEN_USB_SOF (1 << 3)
#define USBCTRL_INTEN_CLR0 0x40
#define USBCTRL_INTEN_CLR1 0x44
#define USBCTRL_UTMI 0xE0
#define USBCTRL_UTMI_FSDATAEXT (1 << 1)
#define USBCTRL_MODE 0xE8
#define USBCTRL_MODE_IDDIG (1 << 8)
#define USBCTRL_MODE_IDDIGMUX (1 << 7)
#define USBSS_WRITE4(sc, reg, val) \
bus_write_4((sc)->sc_mem_res, (reg), (val))
#define USBSS_READ4(sc, reg) \
bus_read_4((sc)->sc_mem_res, (reg))
static device_probe_t usbss_probe;
static device_attach_t usbss_attach;
static device_detach_t usbss_detach;
struct usbss_softc {
struct simplebus_softc simplebus_sc;
struct resource *sc_mem_res;
int sc_mem_rid;
};
static int
usbss_probe(device_t dev)
{
if (!ofw_bus_status_okay(dev))
return (ENXIO);
if (!ofw_bus_is_compatible(dev, "ti,am33xx-usb"))
return (ENXIO);
device_set_desc(dev, "TI AM33xx integrated USB OTG controller");
return (BUS_PROBE_DEFAULT);
}
static int
usbss_attach(device_t dev)
{
struct usbss_softc *sc = device_get_softc(dev);
int i;
uint32_t rev;
phandle_t node;
/* Request the memory resources */
sc->sc_mem_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY,
&sc->sc_mem_rid, RF_ACTIVE);
if (sc->sc_mem_res == NULL) {
device_printf(dev,
"Error: could not allocate mem resources\n");
return (ENXIO);
}
/* Enable device clocks. */
ti_prcm_clk_enable(MUSB0_CLK);
/*
* Reset USBSS, USB0 and USB1.
* The registers of USB subsystem must not be accessed while the
* reset pulse is active (200ns).
*/
USBSS_WRITE4(sc, USBSS_SYSCONFIG, USBSS_SYSCONFIG_SRESET);
DELAY(100);
i = 10;
while (USBSS_READ4(sc, USBSS_SYSCONFIG) & USBSS_SYSCONFIG_SRESET) {
DELAY(100);
if (i-- == 0) {
device_printf(dev, "reset timeout.\n");
return (ENXIO);
}
}
/* Read the module revision. */
rev = USBSS_READ4(sc, USBSS_REVREG);
device_printf(dev, "TI AM335X USBSS v%d.%d.%d\n",
(rev >> 8) & 7, (rev >> 6) & 3, rev & 63);
node = ofw_bus_get_node(dev);
if (node == -1) {
usbss_detach(dev);
return (ENXIO);
}
simplebus_init(dev, node);
/*
* Allow devices to identify.
*/
bus_generic_probe(dev);
/*
* Now walk the OFW tree and attach top-level devices.
*/
for (node = OF_child(node); node > 0; node = OF_peer(node))
simplebus_add_device(dev, node, 0, NULL, -1, NULL);
return (bus_generic_attach(dev));
}
static int
usbss_detach(device_t dev)
{
struct usbss_softc *sc = device_get_softc(dev);
/* Free resources if any */
if (sc->sc_mem_res)
bus_release_resource(dev, SYS_RES_MEMORY, sc->sc_mem_rid,
sc->sc_mem_res);
/* during module unload there are lots of children leftover */
device_delete_children(dev);
return (0);
}
static device_method_t usbss_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, usbss_probe),
DEVMETHOD(device_attach, usbss_attach),
DEVMETHOD(device_detach, usbss_detach),
DEVMETHOD(device_suspend, bus_generic_suspend),
DEVMETHOD(device_resume, bus_generic_resume),
DEVMETHOD(device_shutdown, bus_generic_shutdown),
DEVMETHOD_END
};
DEFINE_CLASS_1(usbss, usbss_driver, usbss_methods,
sizeof(struct usbss_softc), simplebus_driver);
static devclass_t usbss_devclass;
DRIVER_MODULE(usbss, simplebus, usbss_driver, usbss_devclass, 0, 0);
MODULE_DEPEND(usbss, usb, 1, 1, 1);
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