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arm: ti: Add a driver for ti,sysc bus

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ti,sysc is a simple-bus like driver.
Add a driver for it so child nodes can attach.
This commit is contained in:
Emmanuel Vadot 2019-07-22 21:55:33 +00:00
parent 04132e0157
commit b9305a86e1
2 changed files with 126 additions and 0 deletions
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1
sys/arm/ti/files.ti
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@ -16,6 +16,7 @@ arm/ti/ti_gpio_if.m optional gpio
arm/ti/ti_i2c.c optional ti_i2c
arm/ti/ti_sdhci.c optional sdhci
arm/ti/ti_spi.c optional ti_spi
arm/ti/ti_sysc.c standard
dev/uart/uart_dev_ti8250.c optional uart
dev/uart/uart_dev_ns8250.c optional uart

125
sys/arm/ti/ti_sysc.c Normal file
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@ -0,0 +1,125 @@
/*-
* Copyright (c) 2019 Emmanuel Vadot <manu@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 ``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.
*
* $FreeBSD$
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/bus.h>
#include <sys/fbio.h>
#include <sys/kernel.h>
#include <sys/module.h>
#include <sys/rman.h>
#include <sys/resource.h>
#include <machine/bus.h>
#include <vm/vm.h>
#include <vm/vm_extern.h>
#include <vm/vm_kern.h>
#include <vm/pmap.h>
#include <dev/fdt/simplebus.h>
#include <dev/ofw/ofw_bus.h>
#include <dev/ofw/ofw_bus_subr.h>
static struct ofw_compat_data compat_data[] = {
{ "ti,sysc", 1 },
{ NULL, 0 }
};
struct ti_sysc_softc {
struct simplebus_softc sc;
device_t dev;
};
static int ti_sysc_probe(device_t dev);
static int ti_sysc_attach(device_t dev);
static int ti_sysc_detach(device_t dev);
static int
ti_sysc_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 SYSC Interconnect");
return (BUS_PROBE_DEFAULT);
}
static int
ti_sysc_attach(device_t dev)
{
struct ti_sysc_softc *sc;
device_t cdev;
phandle_t node, child;
sc = device_get_softc(dev);
sc->dev = dev;
node = ofw_bus_get_node(dev);
simplebus_init(dev, node);
if (simplebus_fill_ranges(node, &sc->sc) < 0) {
device_printf(dev, "could not get ranges\n");
return (ENXIO);
}
for (child = OF_child(node); child > 0; child = OF_peer(child)) {
cdev = simplebus_add_device(dev, child, 0, NULL, -1, NULL);
if (cdev != NULL)
device_probe_and_attach(cdev);
}
return (bus_generic_attach(dev));
}
static int
ti_sysc_detach(device_t dev)
{
return (EBUSY);
}
static device_method_t ti_sysc_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, ti_sysc_probe),
DEVMETHOD(device_attach, ti_sysc_attach),
DEVMETHOD(device_detach, ti_sysc_detach),
DEVMETHOD_END
};
DEFINE_CLASS_1(ti_sysc, ti_sysc_driver, ti_sysc_methods,
sizeof(struct ti_sysc_softc), simplebus_driver);
static devclass_t ti_sysc_devclass;
EARLY_DRIVER_MODULE(ti_sysc, simplebus, ti_sysc_driver,
ti_sysc_devclass, 0, 0, BUS_PASS_BUS + BUS_PASS_ORDER_FIRST);