294 lines
7.6 KiB
C
294 lines
7.6 KiB
C
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/*-
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* Copyright (c) 2019 Emmanuel Vadot <manu@FreeBSD.org>
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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/ti_sysc.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/kernel.h>
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#include <sys/module.h>
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#include <sys/bus.h>
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#include <sys/resource.h>
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#include <sys/rman.h>
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#include <sys/lock.h>
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#include <sys/mutex.h>
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#include <machine/bus.h>
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#include <machine/resource.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 "syscon_if.h"
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#include <dev/extres/syscon/syscon.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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MALLOC_DECLARE(M_SYSCON);
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struct ti_scm_syscon_softc {
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struct simplebus_softc sc_simplebus;
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device_t dev;
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struct syscon * syscon;
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struct resource * res[1];
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bus_space_tag_t bst;
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bus_space_handle_t bsh;
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struct mtx mtx;
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};
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static struct resource_spec ti_scm_syscon_res_spec[] = {
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{ SYS_RES_MEMORY, 0, RF_ACTIVE | RF_SHAREABLE },
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{ -1, 0 }
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};
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/* Device */
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static struct ofw_compat_data compat_data[] = {
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{ "syscon", 1 },
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{ NULL, 0 }
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};
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/* --- dev/extres/syscon syscon_method_t interface --- */
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static int
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ti_scm_syscon_write_4(struct syscon *syscon, bus_size_t offset, uint32_t val)
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{
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struct ti_scm_syscon_softc *sc;
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sc = device_get_softc(syscon->pdev);
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DPRINTF(sc->dev, "offset=%lx write %x\n", offset, val);
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mtx_lock(&sc->mtx);
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bus_space_write_4(sc->bst, sc->bsh, offset, val);
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mtx_unlock(&sc->mtx);
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return (0);
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}
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static uint32_t
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ti_scm_syscon_read_4(struct syscon *syscon, bus_size_t offset)
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{
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struct ti_scm_syscon_softc *sc;
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uint32_t val;
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sc = device_get_softc(syscon->pdev);
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mtx_lock(&sc->mtx);
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val = bus_space_read_4(sc->bst, sc->bsh, offset);
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mtx_unlock(&sc->mtx);
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DPRINTF(sc->dev, "offset=%lx Read %x\n", offset, val);
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return (val);
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}
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static int
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ti_scm_syscon_modify_4(struct syscon *syscon, bus_size_t offset, uint32_t clr, uint32_t set)
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{
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struct ti_scm_syscon_softc *sc;
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uint32_t reg;
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sc = device_get_softc(syscon->pdev);
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mtx_lock(&sc->mtx);
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reg = bus_space_read_4(sc->bst, sc->bsh, offset);
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reg &= ~clr;
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reg |= set;
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bus_space_write_4(sc->bst, sc->bsh, offset, reg);
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mtx_unlock(&sc->mtx);
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DPRINTF(sc->dev, "offset=%lx reg: %x (clr %x set %x)\n", offset, reg, clr, set);
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return (0);
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}
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static syscon_method_t ti_scm_syscon_reg_methods[] = {
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SYSCONMETHOD(syscon_read_4, ti_scm_syscon_read_4),
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SYSCONMETHOD(syscon_write_4, ti_scm_syscon_write_4),
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SYSCONMETHOD(syscon_modify_4, ti_scm_syscon_modify_4),
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SYSCONMETHOD_END
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};
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DEFINE_CLASS_1(ti_scm_syscon_reg, ti_scm_syscon_reg_class, ti_scm_syscon_reg_methods,
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0, syscon_class);
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/* device interface */
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static int
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ti_scm_syscon_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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device_set_desc(dev, "TI OMAP Control Module Syscon");
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return(BUS_PROBE_DEFAULT);
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}
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static int
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ti_scm_syscon_attach(device_t dev)
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{
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struct ti_scm_syscon_softc *sc;
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phandle_t node, child;
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int err;
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sc = device_get_softc(dev);
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sc->dev = dev;
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if (bus_alloc_resources(dev, ti_scm_syscon_res_spec, sc->res)) {
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device_printf(sc->dev, "Cant allocate resources\n");
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return (ENXIO);
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}
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sc->dev = dev;
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sc->bst = rman_get_bustag(sc->res[0]);
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sc->bsh = rman_get_bushandle(sc->res[0]);
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mtx_init(&sc->mtx, device_get_nameunit(sc->dev), NULL, MTX_DEF);
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node = ofw_bus_get_node(sc->dev);
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/* dev/extres/syscon interface */
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sc->syscon = syscon_create_ofw_node(dev, &ti_scm_syscon_reg_class, node);
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if (sc->syscon == NULL) {
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device_printf(dev, "Failed to create/register syscon\n");
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return (ENXIO);
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}
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simplebus_init(sc->dev, node);
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err = 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(sc->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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/* syscon interface */
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static int
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ti_scm_syscon_get_handle(device_t dev, struct syscon **syscon)
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{
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struct ti_scm_syscon_softc *sc;
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sc = device_get_softc(dev);
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*syscon = sc->syscon;
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if (*syscon == NULL)
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return (ENODEV);
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return (0);
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}
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/* clkdev interface */
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static int
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ti_scm_syscon_clk_write_4(device_t dev, bus_addr_t addr, uint32_t val)
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{
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struct ti_scm_syscon_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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static int
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ti_scm_syscon_clk_read_4(device_t dev, bus_addr_t addr, uint32_t *val)
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{
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struct ti_scm_syscon_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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static int
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ti_scm_syscon_clk_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_scm_syscon_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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static void
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ti_scm_syscon_clk_device_lock(device_t dev)
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{
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struct ti_scm_syscon_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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static void
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ti_scm_syscon_clk_device_unlock(device_t dev)
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{
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struct ti_scm_syscon_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_scm_syscon_methods[] = {
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DEVMETHOD(device_probe, ti_scm_syscon_probe),
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DEVMETHOD(device_attach, ti_scm_syscon_attach),
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/* syscon interface */
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DEVMETHOD(syscon_get_handle, ti_scm_syscon_get_handle),
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/* clkdev interface */
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DEVMETHOD(clkdev_write_4, ti_scm_syscon_clk_write_4),
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DEVMETHOD(clkdev_read_4, ti_scm_syscon_clk_read_4),
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DEVMETHOD(clkdev_modify_4, ti_scm_syscon_clk_modify_4),
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DEVMETHOD(clkdev_device_lock, ti_scm_syscon_clk_device_lock),
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DEVMETHOD(clkdev_device_unlock, ti_scm_syscon_clk_device_unlock),
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DEVMETHOD_END
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};
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DEFINE_CLASS_1(ti_scm_syscon, ti_scm_syscon_driver, ti_scm_syscon_methods,
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sizeof(struct ti_scm_syscon_softc), simplebus_driver);
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static devclass_t ti_scm_syscon_devclass;
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EARLY_DRIVER_MODULE(ti_scm_syscon, simplebus, ti_scm_syscon_driver,
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ti_scm_syscon_devclass, 0, 0, BUS_PASS_BUS + BUS_PASS_ORDER_MIDDLE);
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MODULE_VERSION(ti_scm_syscon, 1);
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MODULE_DEPEND(ti_scm_syscon, ti_scm, 1, 1, 1);
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