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/*-
* Copyright (c) 2019 Emmanuel Vadot <manu@FreeBSD.org>
*
* Copyright (c) 2020 Oskar Holmlund <oskar.holmlund@ohdata.se>
*
* 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.
*
* $FreeBSD$
*/
/* Based on sys/arm/ti/ti_sysc.c */
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/module.h>
#include <sys/bus.h>
#include <sys/resource.h>
#include <sys/rman.h>
#include <sys/lock.h>
#include <sys/mutex.h>
#include <machine/bus.h>
#include <machine/resource.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 <arm/ti/ti_sysc.h>
#if 0
#define DPRINTF(dev, msg...) device_printf(dev, msg)
#else
#define DPRINTF(dev, msg...)
#endif
struct ti_am3359_cppi41_softc {
device_t dev;
struct syscon * syscon;
struct resource * res[4];
bus_space_tag_t bst;
bus_space_handle_t bsh;
struct mtx mtx;
};
static struct resource_spec ti_am3359_cppi41_res_spec[] = {
{ SYS_RES_MEMORY, 0, RF_ACTIVE | RF_SHAREABLE },
{ SYS_RES_MEMORY, 1, RF_ACTIVE | RF_SHAREABLE },
{ SYS_RES_MEMORY, 2, RF_ACTIVE | RF_SHAREABLE },
{ SYS_RES_MEMORY, 3, RF_ACTIVE | RF_SHAREABLE },
{ -1, 0 }
};
/* Device */
static struct ofw_compat_data compat_data[] = {
{ "ti,am3359-cppi41", 1 },
{ NULL, 0 }
};
static int
ti_am3359_cppi41_write_4(device_t dev, bus_addr_t addr, uint32_t val)
{
struct ti_am3359_cppi41_softc *sc;
sc = device_get_softc(dev);
DPRINTF(sc->dev, "offset=%lx write %x\n", addr, val);
mtx_lock(&sc->mtx);
bus_space_write_4(sc->bst, sc->bsh, addr, val);
mtx_unlock(&sc->mtx);
return (0);
}
static uint32_t
ti_am3359_cppi41_read_4(device_t dev, bus_addr_t addr)
{
struct ti_am3359_cppi41_softc *sc;
uint32_t val;
sc = device_get_softc(dev);
mtx_lock(&sc->mtx);
val = bus_space_read_4(sc->bst, sc->bsh, addr);
mtx_unlock(&sc->mtx);
DPRINTF(sc->dev, "offset=%lx Read %x\n", addr, val);
return (val);
}
/* device interface */
static int
ti_am3359_cppi41_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, "TI AM3359 CPPI 41");
return(BUS_PROBE_DEFAULT);
}
static int
ti_am3359_cppi41_attach(device_t dev)
{
struct ti_am3359_cppi41_softc *sc;
phandle_t node;
uint32_t reg, reset_bit, timeout=10;
uint64_t sysc_address;
device_t parent;
sc = device_get_softc(dev);
sc->dev = dev;
if (bus_alloc_resources(dev, ti_am3359_cppi41_res_spec, sc->res)) {
device_printf(sc->dev, "Cant allocate resources\n");
return (ENXIO);
}
sc->dev = dev;
sc->bst = rman_get_bustag(sc->res[0]);
sc->bsh = rman_get_bushandle(sc->res[0]);
mtx_init(&sc->mtx, device_get_nameunit(sc->dev), NULL, MTX_DEF);
node = ofw_bus_get_node(sc->dev);
/* variant of am335x_usbss.c */
DPRINTF(dev, "-- RESET USB --\n");
parent = device_get_parent(dev);
reset_bit = ti_sysc_get_soft_reset_bit(parent);
if (reset_bit == 0) {
DPRINTF(dev, "Dont have reset bit\n");
return (0);
}
sysc_address = ti_sysc_get_sysc_address_offset_host(parent);
DPRINTF(dev, "sysc_address %x\n", sysc_address);
ti_am3359_cppi41_write_4(dev, sysc_address, reset_bit);
DELAY(100);
reg = ti_am3359_cppi41_read_4(dev, sysc_address);
if ((reg & reset_bit) && timeout--) {
DPRINTF(dev, "Reset still ongoing - wait a little bit longer\n");
DELAY(100);
reg = ti_am3359_cppi41_read_4(dev, sysc_address);
}
if (timeout == 0)
device_printf(dev, "USB Reset timeout\n");
return (0);
}
static device_method_t ti_am3359_cppi41_methods[] = {
DEVMETHOD(device_probe, ti_am3359_cppi41_probe),
DEVMETHOD(device_attach, ti_am3359_cppi41_attach),
DEVMETHOD_END
};
DEFINE_CLASS_1(ti_am3359_cppi41, ti_am3359_cppi41_driver,
ti_am3359_cppi41_methods,sizeof(struct ti_am3359_cppi41_softc),
simplebus_driver);
static devclass_t ti_am3359_cppi41_devclass;
EARLY_DRIVER_MODULE(ti_am3359_cppi41, simplebus, ti_am3359_cppi41_driver,
ti_am3359_cppi41_devclass, 0, 0, BUS_PASS_BUS + BUS_PASS_ORDER_MIDDLE);
MODULE_VERSION(ti_am3359_cppi41, 1);
MODULE_DEPEND(ti_am3359_cppi41, ti_sysc, 1, 1, 1);
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