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/*-
* Copyright (c) 2016 Michal Meloun <mmel@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, 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("$FreeBSD$");
/*
* SoC misc configuration and indentification driver.
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/bus.h>
#include <sys/clock.h>
#include <sys/kernel.h>
#include <sys/limits.h>
#include <sys/lock.h>
#include <sys/mutex.h>
#include <sys/module.h>
#include <sys/resource.h>
#include <machine/bus.h>
#include <machine/resource.h>
#include <sys/rman.h>
#include <dev/ofw/ofw_bus.h>
#include <dev/ofw/ofw_bus_subr.h>
#include <arm/nvidia/tegra_efuse.h>
#define PMC_STRAPPING_OPT_A 0 /* 0x464 */
#define PMC_STRAPPING_OPT_A_RAM_CODE_SHIFT 4
#define PMC_STRAPPING_OPT_A_RAM_CODE_MASK_LONG \
(0xf << PMC_STRAPPING_OPT_A_RAM_CODE_SHIFT)
#define PMC_STRAPPING_OPT_A_RAM_CODE_MASK_SHORT \
(0x3 << PMC_STRAPPING_OPT_A_RAM_CODE_SHIFT)
#define ABP_RD4(_sc, _r) bus_read_4((_sc)->abp_misc_res, (_r))
#define STR_RD4(_sc, _r) bus_read_4((_sc)->strap_opt_res, (_r))
static struct ofw_compat_data compat_data[] = {
{"nvidia,tegra124-apbmisc", 1},
{"nvidia,tegra210-apbmisc", 1},
{NULL, 0}
};
struct tegra_abpmisc_softc {
device_t dev;
struct resource *abp_misc_res;
struct resource *strap_opt_res;
};
static struct tegra_abpmisc_softc *dev_sc;
static void
tegra_abpmisc_read_revision(struct tegra_abpmisc_softc *sc)
{
uint32_t id, chip_id, minor_rev;
int rev;
id = ABP_RD4(sc, 4);
chip_id = (id >> 8) & 0xff;
minor_rev = (id >> 16) & 0xf;
switch (minor_rev) {
case 1:
rev = TEGRA_REVISION_A01;
break;
case 2:
rev = TEGRA_REVISION_A02;
break;
case 3:
rev = TEGRA_REVISION_A03;
break;
case 4:
rev = TEGRA_REVISION_A04;
break;
default:
rev = TEGRA_REVISION_UNKNOWN;
}
tegra_sku_info.chip_id = chip_id;
tegra_sku_info.revision = rev;
}
static int
tegra_abpmisc_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);
return (BUS_PROBE_DEFAULT);
}
static int
tegra_abpmisc_attach(device_t dev)
{
int rid;
struct tegra_abpmisc_softc *sc;
sc = device_get_softc(dev);
sc->dev = dev;
rid = 0;
sc->abp_misc_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid,
RF_ACTIVE | RF_SHAREABLE);
if (sc->abp_misc_res == NULL) {
device_printf(dev, "Cannot map ABP misc registers.\n");
goto fail;
}
rid = 1;
sc->strap_opt_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid,
RF_ACTIVE);
if (sc->strap_opt_res == NULL) {
device_printf(dev, "Cannot map strapping options registers.\n");
goto fail;
}
tegra_abpmisc_read_revision(sc);
/* XXX - Hack - address collision with pinmux. */
if (sc->abp_misc_res != NULL) {
bus_release_resource(dev, SYS_RES_MEMORY, 0, sc->abp_misc_res);
sc->abp_misc_res = NULL;
}
dev_sc = sc;
return (bus_generic_attach(dev));
fail:
if (sc->abp_misc_res != NULL)
bus_release_resource(dev, SYS_RES_MEMORY, 0, sc->abp_misc_res);
if (sc->strap_opt_res != NULL)
bus_release_resource(dev, SYS_RES_MEMORY, 1, sc->strap_opt_res);
return (ENXIO);
}
static int
tegra_abpmisc_detach(device_t dev)
{
struct tegra_abpmisc_softc *sc;
sc = device_get_softc(dev);
if (sc->abp_misc_res != NULL)
bus_release_resource(dev, SYS_RES_MEMORY, 0, sc->abp_misc_res);
if (sc->strap_opt_res != NULL)
bus_release_resource(dev, SYS_RES_MEMORY, 1, sc->strap_opt_res);
return (bus_generic_detach(dev));
}
static device_method_t tegra_abpmisc_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, tegra_abpmisc_probe),
DEVMETHOD(device_attach, tegra_abpmisc_attach),
DEVMETHOD(device_detach, tegra_abpmisc_detach),
DEVMETHOD_END
};
static devclass_t tegra_abpmisc_devclass;
static DEFINE_CLASS_0(abpmisc, tegra_abpmisc_driver, tegra_abpmisc_methods,
sizeof(struct tegra_abpmisc_softc));
EARLY_DRIVER_MODULE(tegra_abpmisc, simplebus, tegra_abpmisc_driver,
tegra_abpmisc_devclass, NULL, NULL, BUS_PASS_TIMER);
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