af3dc4a7ca
Mainly focus on files that use BSD 2-Clause license, however the tool I was using misidentified many licenses so this was mostly a manual - error prone - task. The Software Package Data Exchange (SPDX) group provides a specification to make it easier for automated tools to detect and summarize well known opensource licenses. We are gradually adopting the specification, noting that the tags are considered only advisory and do not, in any way, superceed or replace the license texts.
182 lines
4.9 KiB
C
182 lines
4.9 KiB
C
/*-
|
|
* SPDX-License-Identifier: BSD-4-Clause
|
|
*
|
|
* Copyright (c) 2010
|
|
* Ben Gray <ben.r.gray@gmail.com>.
|
|
* 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.
|
|
* 3. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by Ben Gray.
|
|
* 4. The name of the company nor the name of the author may be used to
|
|
* endorse or promote products derived from this software without specific
|
|
* prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY BEN GRAY ``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 BEN GRAY 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.
|
|
*/
|
|
|
|
/**
|
|
* SCM - System Control Module
|
|
*
|
|
* Hopefully in the end this module will contain a bunch of utility functions
|
|
* for configuring and querying the general system control registers, but for
|
|
* now it only does pin(pad) multiplexing.
|
|
*
|
|
* This is different from the GPIO module in that it is used to configure the
|
|
* pins between modules not just GPIO input/output.
|
|
*
|
|
* This file contains the generic top level driver, however it relies on chip
|
|
* specific settings and therefore expects an array of ti_scm_padconf structs
|
|
* call ti_padconf_devmap to be located somewhere in the kernel.
|
|
*
|
|
*/
|
|
#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/ofw/openfirm.h>
|
|
#include <dev/ofw/ofw_bus.h>
|
|
#include <dev/ofw/ofw_bus_subr.h>
|
|
#include <dev/fdt/fdt_pinctrl.h>
|
|
|
|
#include "ti_scm.h"
|
|
#include "ti_cpuid.h"
|
|
|
|
static struct resource_spec ti_scm_res_spec[] = {
|
|
{ SYS_RES_MEMORY, 0, RF_ACTIVE }, /* Control memory window */
|
|
{ -1, 0 }
|
|
};
|
|
|
|
static struct ti_scm_softc *ti_scm_sc;
|
|
|
|
#define ti_scm_read_4(sc, reg) \
|
|
bus_space_read_4((sc)->sc_bst, (sc)->sc_bsh, (reg))
|
|
#define ti_scm_write_4(sc, reg, val) \
|
|
bus_space_write_4((sc)->sc_bst, (sc)->sc_bsh, (reg), (val))
|
|
|
|
/*
|
|
* Device part of OMAP SCM driver
|
|
*/
|
|
static int
|
|
ti_scm_probe(device_t dev)
|
|
{
|
|
|
|
if (!ti_soc_is_supported())
|
|
return (ENXIO);
|
|
|
|
if (!ofw_bus_status_okay(dev))
|
|
return (ENXIO);
|
|
|
|
if (!ofw_bus_is_compatible(dev, "syscon"))
|
|
return (ENXIO);
|
|
|
|
if (ti_scm_sc) {
|
|
return (EEXIST);
|
|
}
|
|
|
|
device_set_desc(dev, "TI Control Module");
|
|
return (BUS_PROBE_DEFAULT);
|
|
}
|
|
|
|
/**
|
|
* ti_scm_attach - attaches the timer to the simplebus
|
|
* @dev: new device
|
|
*
|
|
* Reserves memory and interrupt resources, stores the softc structure
|
|
* globally and registers both the timecount and eventtimer objects.
|
|
*
|
|
* RETURNS
|
|
* Zero on success or ENXIO if an error occuried.
|
|
*/
|
|
static int
|
|
ti_scm_attach(device_t dev)
|
|
{
|
|
struct ti_scm_softc *sc = device_get_softc(dev);
|
|
|
|
sc->sc_dev = dev;
|
|
|
|
if (bus_alloc_resources(dev, ti_scm_res_spec, sc->sc_res)) {
|
|
device_printf(dev, "could not allocate resources\n");
|
|
return (ENXIO);
|
|
}
|
|
|
|
/* Global timer interface */
|
|
sc->sc_bst = rman_get_bustag(sc->sc_res[0]);
|
|
sc->sc_bsh = rman_get_bushandle(sc->sc_res[0]);
|
|
|
|
ti_scm_sc = sc;
|
|
|
|
/* Attach platform extensions, if any. */
|
|
bus_generic_probe(dev);
|
|
|
|
return (bus_generic_attach(dev));
|
|
}
|
|
|
|
int
|
|
ti_scm_reg_read_4(uint32_t reg, uint32_t *val)
|
|
{
|
|
if (!ti_scm_sc)
|
|
return (ENXIO);
|
|
|
|
*val = ti_scm_read_4(ti_scm_sc, reg);
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
ti_scm_reg_write_4(uint32_t reg, uint32_t val)
|
|
{
|
|
if (!ti_scm_sc)
|
|
return (ENXIO);
|
|
|
|
ti_scm_write_4(ti_scm_sc, reg, val);
|
|
return (0);
|
|
}
|
|
|
|
|
|
static device_method_t ti_scm_methods[] = {
|
|
DEVMETHOD(device_probe, ti_scm_probe),
|
|
DEVMETHOD(device_attach, ti_scm_attach),
|
|
|
|
{ 0, 0 }
|
|
};
|
|
|
|
static driver_t ti_scm_driver = {
|
|
"ti_scm",
|
|
ti_scm_methods,
|
|
sizeof(struct ti_scm_softc),
|
|
};
|
|
|
|
static devclass_t ti_scm_devclass;
|
|
|
|
EARLY_DRIVER_MODULE(ti_scm, simplebus, ti_scm_driver, ti_scm_devclass, 0, 0,
|
|
BUS_PASS_BUS + BUS_PASS_ORDER_MIDDLE);
|