342 lines
9.4 KiB
C
342 lines
9.4 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright (c) 2012 Damjan Marion <dmarion@Freebsd.org>
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* All rights reserved.
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*
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* Copyright (c) 2020 Oskar Holmlund <oskar.holmlund@ohdata.se>
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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 ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* 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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* $FreeBSD$
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*/
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/* Based on sys/arm/ti/am335x/am335x_prcm.c */
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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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/kernel.h>
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#include <sys/module.h>
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#include <sys/malloc.h>
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#include <sys/rman.h>
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#include <sys/timeet.h>
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#include <sys/timetc.h>
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#include <sys/watchdog.h>
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#include <machine/bus.h>
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#include <machine/cpu.h>
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#include <machine/intr.h>
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#include <arm/ti/ti_cpuid.h>
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#include <arm/ti/ti_prcm.h>
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#include <arm/ti/tivar.h>
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#include <dev/fdt/simplebus.h>
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#include <dev/ofw/openfirm.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 "clkdev_if.h"
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#if 0
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#define DPRINTF(dev, msg...) device_printf(dev, msg)
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#else
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#define DPRINTF(dev, msg...)
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#endif
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struct ti_prcm_softc {
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struct simplebus_softc sc_simplebus;
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device_t dev;
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struct resource * mem_res;
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bus_space_tag_t bst;
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bus_space_handle_t bsh;
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int attach_done;
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struct mtx mtx;
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};
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static struct ti_prcm_softc *ti_prcm_sc = NULL;
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static void omap4_prcm_reset(void);
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static void am335x_prcm_reset(void);
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#define TI_AM3_PRCM 18
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#define TI_AM4_PRCM 17
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#define TI_OMAP2_PRCM 16
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#define TI_OMAP3_PRM 15
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#define TI_OMAP3_CM 14
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#define TI_OMAP4_CM1 13
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#define TI_OMAP4_PRM 12
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#define TI_OMAP4_CM2 11
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#define TI_OMAP4_SCRM 10
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#define TI_OMAP5_PRM 9
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#define TI_OMAP5_CM_CORE_AON 8
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#define TI_OMAP5_SCRM 7
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#define TI_OMAP5_CM_CORE 6
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#define TI_DRA7_PRM 5
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#define TI_DRA7_CM_CORE_AON 4
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#define TI_DRA7_CM_CORE 3
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#define TI_DM814_PRCM 2
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#define TI_DM816_PRCM 1
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#define TI_PRCM_END 0
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static struct ofw_compat_data compat_data[] = {
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{ "ti,am3-prcm", TI_AM3_PRCM },
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{ "ti,am4-prcm", TI_AM4_PRCM },
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{ "ti,omap2-prcm", TI_OMAP2_PRCM },
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{ "ti,omap3-prm", TI_OMAP3_PRM },
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{ "ti,omap3-cm", TI_OMAP3_CM },
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{ "ti,omap4-cm1", TI_OMAP4_CM1 },
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{ "ti,omap4-prm", TI_OMAP4_PRM },
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{ "ti,omap4-cm2", TI_OMAP4_CM2 },
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{ "ti,omap4-scrm", TI_OMAP4_SCRM },
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{ "ti,omap5-prm", TI_OMAP5_PRM },
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{ "ti,omap5-cm-core-aon", TI_OMAP5_CM_CORE_AON },
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{ "ti,omap5-scrm", TI_OMAP5_SCRM },
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{ "ti,omap5-cm-core", TI_OMAP5_CM_CORE },
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{ "ti,dra7-prm", TI_DRA7_PRM },
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{ "ti,dra7-cm-core-aon", TI_DRA7_CM_CORE_AON },
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{ "ti,dra7-cm-core", TI_DRA7_CM_CORE },
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{ "ti,dm814-prcm", TI_DM814_PRCM },
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{ "ti,dm816-prcm", TI_DM816_PRCM },
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{ NULL, TI_PRCM_END}
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};
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static int
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ti_prcm_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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}
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device_set_desc(dev, "TI Power and Clock Management");
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return(BUS_PROBE_DEFAULT);
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}
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static int
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ti_prcm_attach(device_t dev)
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{
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struct ti_prcm_softc *sc;
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phandle_t node, child;
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int rid;
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sc = device_get_softc(dev);
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sc->dev = dev;
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node = ofw_bus_get_node(sc->dev);
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simplebus_init(sc->dev, node);
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if (simplebus_fill_ranges(node, &sc->sc_simplebus) < 0) {
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device_printf(sc->dev, "could not get ranges\n");
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return (ENXIO);
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}
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if (sc->sc_simplebus.nranges == 0) {
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device_printf(sc->dev, "nranges == 0\n");
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return (ENXIO);
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}
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sc->mem_res = bus_alloc_resource(sc->dev, SYS_RES_MEMORY, &rid,
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sc->sc_simplebus.ranges[0].host,
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(sc->sc_simplebus.ranges[0].host +
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sc->sc_simplebus.ranges[0].size - 1),
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sc->sc_simplebus.ranges[0].size,
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RF_ACTIVE | RF_SHAREABLE);
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if (sc->mem_res == NULL) {
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return (ENXIO);
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}
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sc->bst = rman_get_bustag(sc->mem_res);
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sc->bsh = rman_get_bushandle(sc->mem_res);
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mtx_init(&sc->mtx, device_get_nameunit(dev), NULL, MTX_DEF);
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/* Fixme: for xxx_prcm_reset functions.
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* Get rid of global variables?
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*/
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ti_prcm_sc = sc;
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switch(ti_chip()) {
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#ifdef SOC_OMAP4
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case CHIP_OMAP_4:
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ti_cpu_reset = omap4_prcm_reset;
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break;
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#endif
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#ifdef SOC_TI_AM335X
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case CHIP_AM335X:
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ti_cpu_reset = am335x_prcm_reset;
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break;
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#endif
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}
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bus_generic_probe(sc->dev);
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for (child = OF_child(node); child != 0; child = OF_peer(child)) {
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simplebus_add_device(dev, child, 0, NULL, -1, NULL);
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}
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return (bus_generic_attach(sc->dev));
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}
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int
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ti_prcm_write_4(device_t dev, bus_addr_t addr, uint32_t val)
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{
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struct ti_prcm_softc *sc;
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sc = device_get_softc(dev);
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DPRINTF(sc->dev, "offset=%lx write %x\n", addr, val);
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bus_space_write_4(sc->bst, sc->bsh, addr, val);
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return (0);
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}
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int
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ti_prcm_read_4(device_t dev, bus_addr_t addr, uint32_t *val)
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{
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struct ti_prcm_softc *sc;
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sc = device_get_softc(dev);
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*val = bus_space_read_4(sc->bst, sc->bsh, addr);
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DPRINTF(sc->dev, "offset=%lx Read %x\n", addr, *val);
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return (0);
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}
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int
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ti_prcm_modify_4(device_t dev, bus_addr_t addr, uint32_t clr, uint32_t set)
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{
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struct ti_prcm_softc *sc;
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uint32_t reg;
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sc = device_get_softc(dev);
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reg = bus_space_read_4(sc->bst, sc->bsh, addr);
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reg &= ~clr;
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reg |= set;
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bus_space_write_4(sc->bst, sc->bsh, addr, reg);
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DPRINTF(sc->dev, "offset=%lx reg: %x (clr %x set %x)\n", addr, reg, clr, set);
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return (0);
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}
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void
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ti_prcm_device_lock(device_t dev)
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{
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struct ti_prcm_softc *sc;
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sc = device_get_softc(dev);
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mtx_lock(&sc->mtx);
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}
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void
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ti_prcm_device_unlock(device_t dev)
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{
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struct ti_prcm_softc *sc;
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sc = device_get_softc(dev);
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mtx_unlock(&sc->mtx);
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}
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static device_method_t ti_prcm_methods[] = {
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DEVMETHOD(device_probe, ti_prcm_probe),
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DEVMETHOD(device_attach, ti_prcm_attach),
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/* clkdev interface */
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DEVMETHOD(clkdev_write_4, ti_prcm_write_4),
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DEVMETHOD(clkdev_read_4, ti_prcm_read_4),
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DEVMETHOD(clkdev_modify_4, ti_prcm_modify_4),
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DEVMETHOD(clkdev_device_lock, ti_prcm_device_lock),
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DEVMETHOD(clkdev_device_unlock, ti_prcm_device_unlock),
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DEVMETHOD_END
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};
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DEFINE_CLASS_1(ti_prcm, ti_prcm_driver, ti_prcm_methods,
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sizeof(struct ti_prcm_softc), simplebus_driver);
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EARLY_DRIVER_MODULE(ti_prcm, ofwbus, ti_prcm_driver, 0, 0, BUS_PASS_BUS);
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EARLY_DRIVER_MODULE(ti_prcm, simplebus, ti_prcm_driver, 0, 0,
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BUS_PASS_BUS + BUS_PASS_ORDER_MIDDLE);
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MODULE_VERSION(ti_prcm, 1);
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MODULE_DEPEND(ti_prcm, ti_scm, 1, 1, 1);
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/* From sys/arm/ti/am335x/am335x_prcm.c
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* Copyright (c) 2012 Damjan Marion <dmarion@Freebsd.org>
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*/
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#define PRM_DEVICE_OFFSET 0xF00
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#define AM335x_PRM_RSTCTRL (PRM_DEVICE_OFFSET + 0x00)
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static void
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am335x_prcm_reset(void)
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{
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ti_prcm_write_4(ti_prcm_sc->dev, AM335x_PRM_RSTCTRL, (1<<1));
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}
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/* FIXME: Is this correct - or should the license part be ontop? */
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/* From sys/arm/ti/omap4/omap4_prcm_clks.c */
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/*-
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* SPDX-License-Identifier: BSD-3-Clause
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*
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* Copyright (c) 2011
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* Ben Gray <ben.r.gray@gmail.com>.
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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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* 3. The name of the company nor the name of the author may be used to
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* endorse or promote products derived from this software without specific
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* prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY BEN GRAY ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL BEN GRAY BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#define PRM_RSTCTRL 0x1b00
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#define PRM_RSTCTRL_RESET 0x2
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static void
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omap4_prcm_reset(void)
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{
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uint32_t reg;
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ti_prcm_read_4(ti_prcm_sc->dev, PRM_RSTCTRL, ®);
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reg = reg | PRM_RSTCTRL_RESET;
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ti_prcm_write_4(ti_prcm_sc->dev, PRM_RSTCTRL, reg);
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ti_prcm_read_4(ti_prcm_sc->dev, PRM_RSTCTRL, ®);
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}
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