2016-03-16 13:01:48 +00:00
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/*-
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* Copyright (c) 2016 Michal Meloun <mmel@FreeBSD.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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/*
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* SoC misc configuration and indentification driver.
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/bus.h>
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#include <sys/clock.h>
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#include <sys/kernel.h>
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#include <sys/limits.h>
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#include <sys/lock.h>
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#include <sys/mutex.h>
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#include <sys/module.h>
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#include <sys/resource.h>
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#include <machine/bus.h>
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#include <machine/resource.h>
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#include <sys/rman.h>
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#include <dev/ofw/ofw_bus.h>
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#include <dev/ofw/ofw_bus_subr.h>
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#include <arm/nvidia/tegra_efuse.h>
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#define PMC_STRAPPING_OPT_A 0 /* 0x464 */
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#define PMC_STRAPPING_OPT_A_RAM_CODE_SHIFT 4
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#define PMC_STRAPPING_OPT_A_RAM_CODE_MASK_LONG \
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(0xf << PMC_STRAPPING_OPT_A_RAM_CODE_SHIFT)
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#define PMC_STRAPPING_OPT_A_RAM_CODE_MASK_SHORT \
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(0x3 << PMC_STRAPPING_OPT_A_RAM_CODE_SHIFT)
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#define ABP_RD4(_sc, _r) bus_read_4((_sc)->abp_misc_res, (_r))
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#define STR_RD4(_sc, _r) bus_read_4((_sc)->strap_opt_res, (_r))
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static struct ofw_compat_data compat_data[] = {
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{"nvidia,tegra124-apbmisc", 1},
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{NULL, 0}
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};
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struct tegra_abpmisc_softc {
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device_t dev;
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struct resource *abp_misc_res;
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struct resource *strap_opt_res;
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};
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static struct tegra_abpmisc_softc *dev_sc;
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static void
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tegra_abpmisc_read_revision(struct tegra_abpmisc_softc *sc)
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{
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uint32_t id, chip_id, minor_rev;
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int rev;
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id = ABP_RD4(sc, 4);
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chip_id = (id >> 8) & 0xff;
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minor_rev = (id >> 16) & 0xf;
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switch (minor_rev) {
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case 1:
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rev = TEGRA_REVISION_A01;
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break;
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case 2:
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rev = TEGRA_REVISION_A02;
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break;
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case 3:
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rev = TEGRA_REVISION_A03;
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break;
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case 4:
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rev = TEGRA_REVISION_A04;
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break;
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default:
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rev = TEGRA_REVISION_UNKNOWN;
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}
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tegra_sku_info.chip_id = chip_id;
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tegra_sku_info.revision = rev;
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}
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static int
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tegra_abpmisc_probe(device_t dev)
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{
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if (!ofw_bus_status_okay(dev))
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return (ENXIO);
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if (ofw_bus_search_compatible(dev, compat_data)->ocd_data == 0)
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return (ENXIO);
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return (BUS_PROBE_DEFAULT);
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}
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static int
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tegra_abpmisc_attach(device_t dev)
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{
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int rid;
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struct tegra_abpmisc_softc *sc;
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sc = device_get_softc(dev);
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sc->dev = dev;
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rid = 0;
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sc->abp_misc_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid,
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RF_ACTIVE | RF_SHAREABLE);
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if (sc->abp_misc_res == NULL) {
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device_printf(dev, "Cannot map ABP misc registers.\n");
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goto fail;
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}
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rid = 1;
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sc->strap_opt_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid,
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RF_ACTIVE);
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if (sc->strap_opt_res == NULL) {
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device_printf(dev, "Cannot map strapping options registers.\n");
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goto fail;
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}
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tegra_abpmisc_read_revision(sc);
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/* XXX - Hack - address collision with pinmux. */
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if (sc->abp_misc_res != NULL) {
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bus_release_resource(dev, SYS_RES_MEMORY, 0, sc->abp_misc_res);
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sc->abp_misc_res = NULL;
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}
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dev_sc = sc;
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return (bus_generic_attach(dev));
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fail:
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if (sc->abp_misc_res != NULL)
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bus_release_resource(dev, SYS_RES_MEMORY, 0, sc->abp_misc_res);
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if (sc->strap_opt_res != NULL)
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bus_release_resource(dev, SYS_RES_MEMORY, 1, sc->strap_opt_res);
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return (ENXIO);
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}
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static int
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tegra_abpmisc_detach(device_t dev)
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{
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struct tegra_abpmisc_softc *sc;
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sc = device_get_softc(dev);
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if (sc->abp_misc_res != NULL)
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bus_release_resource(dev, SYS_RES_MEMORY, 0, sc->abp_misc_res);
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if (sc->strap_opt_res != NULL)
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bus_release_resource(dev, SYS_RES_MEMORY, 1, sc->strap_opt_res);
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return (bus_generic_detach(dev));
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}
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static device_method_t tegra_abpmisc_methods[] = {
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/* Device interface */
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DEVMETHOD(device_probe, tegra_abpmisc_probe),
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DEVMETHOD(device_attach, tegra_abpmisc_attach),
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DEVMETHOD(device_detach, tegra_abpmisc_detach),
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DEVMETHOD_END
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};
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static devclass_t tegra_abpmisc_devclass;
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2016-09-30 05:25:15 +00:00
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static DEFINE_CLASS_0(abpmisc, tegra_abpmisc_driver, tegra_abpmisc_methods,
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sizeof(struct tegra_abpmisc_softc));
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2016-03-16 13:01:48 +00:00
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EARLY_DRIVER_MODULE(tegra_abpmisc, simplebus, tegra_abpmisc_driver,
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2016-09-30 05:25:15 +00:00
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tegra_abpmisc_devclass, NULL, NULL, BUS_PASS_TIMER);
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