71d90c04a8
to check the status property in their probe routines. Simplebus used to only instantiate its children whose status="okay" but that was improper behavior, fixed in r261352. Now that it doesn't check anymore and probes all its children; the children all have to do the check because really only the children know how to properly interpret their status property strings. Right now all existing drivers only understand "okay" versus something- that's-not-okay, so they all use the new ofw_bus_status_okay() helper.
267 lines
6.8 KiB
C
267 lines
6.8 KiB
C
/*-
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* Copyright (c) 2013 Rui Paulo <rpaulo@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 ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* 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,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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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/frame.h>
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#include <machine/intr.h>
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#include <dev/fdt/fdt_common.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 <machine/bus.h>
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#include <machine/fdt.h>
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#include <arm/ti/ti_mbox.h>
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#include <arm/ti/ti_prcm.h>
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#include "mbox_if.h"
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#define DEBUG
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#ifdef DEBUG
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#define DPRINTF(fmt, ...) do { \
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printf("%s: ", __func__); \
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printf(fmt, __VA_ARGS__); \
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} while (0)
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#else
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#define DPRINTF(fmt, ...)
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#endif
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static device_probe_t ti_mbox_probe;
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static device_attach_t ti_mbox_attach;
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static device_detach_t ti_mbox_detach;
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static void ti_mbox_intr(void *);
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static int ti_mbox_read(device_t, int, uint32_t *);
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static int ti_mbox_write(device_t, int, uint32_t);
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struct ti_mbox_softc {
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struct mtx sc_mtx;
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struct resource *sc_mem_res;
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struct resource *sc_irq_res;
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void *sc_intr;
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bus_space_tag_t sc_bt;
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bus_space_handle_t sc_bh;
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};
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#define TI_MBOX_LOCK(sc) mtx_lock(&(sc)->sc_mtx)
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#define TI_MBOX_UNLOCK(sc) mtx_unlock(&(sc)->sc_mtx)
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static device_method_t ti_mbox_methods[] = {
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DEVMETHOD(device_probe, ti_mbox_probe),
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DEVMETHOD(device_attach, ti_mbox_attach),
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DEVMETHOD(device_detach, ti_mbox_detach),
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DEVMETHOD(mbox_read, ti_mbox_read),
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DEVMETHOD(mbox_write, ti_mbox_write),
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DEVMETHOD_END
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};
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static driver_t ti_mbox_driver = {
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"ti_mbox",
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ti_mbox_methods,
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sizeof(struct ti_mbox_softc)
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};
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static devclass_t ti_mbox_devclass;
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DRIVER_MODULE(ti_mbox, simplebus, ti_mbox_driver, ti_mbox_devclass, 0, 0);
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static __inline uint32_t
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ti_mbox_reg_read(struct ti_mbox_softc *sc, uint16_t reg)
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{
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return (bus_space_read_4(sc->sc_bt, sc->sc_bh, reg));
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}
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static __inline void
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ti_mbox_reg_write(struct ti_mbox_softc *sc, uint16_t reg, uint32_t val)
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{
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bus_space_write_4(sc->sc_bt, sc->sc_bh, reg, val);
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}
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static int
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ti_mbox_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_is_compatible(dev, "ti,system-mbox")) {
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device_set_desc(dev, "TI System Mailbox");
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return (BUS_PROBE_DEFAULT);
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}
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return (ENXIO);
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}
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static int
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ti_mbox_attach(device_t dev)
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{
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struct ti_mbox_softc *sc;
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int rid, delay, chan;
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uint32_t rev, sysconfig;
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if (ti_prcm_clk_enable(MAILBOX0_CLK) != 0) {
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device_printf(dev, "could not enable MBOX clock\n");
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return (ENXIO);
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}
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sc = device_get_softc(dev);
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rid = 0;
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mtx_init(&sc->sc_mtx, "TI mbox", NULL, MTX_DEF);
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sc->sc_mem_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid,
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RF_ACTIVE);
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if (sc->sc_mem_res == NULL) {
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device_printf(dev, "could not allocate memory resource\n");
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return (ENXIO);
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}
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sc->sc_bt = rman_get_bustag(sc->sc_mem_res);
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sc->sc_bh = rman_get_bushandle(sc->sc_mem_res);
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rid = 0;
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sc->sc_irq_res = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid,
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RF_ACTIVE);
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if (sc->sc_irq_res == NULL) {
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device_printf(dev, "could not allocate interrupt resource\n");
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ti_mbox_detach(dev);
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return (ENXIO);
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}
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if (bus_setup_intr(dev, sc->sc_irq_res, INTR_MPSAFE | INTR_TYPE_MISC,
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NULL, ti_mbox_intr, sc, &sc->sc_intr) != 0) {
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device_printf(dev, "unable to setup the interrupt handler\n");
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ti_mbox_detach(dev);
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return (ENXIO);
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}
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/*
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* Reset the controller.
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*/
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sysconfig = ti_mbox_reg_read(sc, TI_MBOX_SYSCONFIG);
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DPRINTF("initial sysconfig %d\n", sysconfig);
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sysconfig |= TI_MBOX_SYSCONFIG_SOFTRST;
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delay = 100;
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while (ti_mbox_reg_read(sc, TI_MBOX_SYSCONFIG) &
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TI_MBOX_SYSCONFIG_SOFTRST) {
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delay--;
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DELAY(10);
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}
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if (delay == 0) {
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device_printf(dev, "controller reset failed\n");
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ti_mbox_detach(dev);
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return (ENXIO);
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}
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/*
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* Enable smart idle mode.
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*/
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ti_mbox_reg_write(sc, TI_MBOX_SYSCONFIG,
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ti_mbox_reg_read(sc, TI_MBOX_SYSCONFIG) | TI_MBOX_SYSCONFIG_SMARTIDLE);
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rev = ti_mbox_reg_read(sc, TI_MBOX_REVISION);
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DPRINTF("rev %d\n", rev);
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device_printf(dev, "revision %d.%d\n", (rev >> 8) & 0x4, rev & 0x40);
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/*
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* Enable message interrupts.
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*/
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for (chan = 0; chan < 8; chan++)
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ti_mbox_reg_write(sc, TI_MBOX_IRQENABLE_SET(chan), 1);
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return (0);
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}
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static int
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ti_mbox_detach(device_t dev)
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{
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struct ti_mbox_softc *sc;
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sc = device_get_softc(dev);
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if (sc->sc_intr)
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bus_teardown_intr(dev, sc->sc_irq_res, sc->sc_intr);
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if (sc->sc_irq_res)
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bus_release_resource(dev, SYS_RES_IRQ, rman_get_rid(sc->sc_irq_res),
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sc->sc_irq_res);
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if (sc->sc_mem_res)
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bus_release_resource(dev, SYS_RES_MEMORY, rman_get_rid(sc->sc_mem_res),
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sc->sc_mem_res);
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return (0);
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}
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static void
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ti_mbox_intr(void *arg)
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{
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struct ti_mbox_softc *sc;
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sc = arg;
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DPRINTF("interrupt %p", sc);
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}
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static int
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ti_mbox_read(device_t dev, int chan, uint32_t *data)
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{
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struct ti_mbox_softc *sc;
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if (chan < 0 || chan > 7)
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return (EINVAL);
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sc = device_get_softc(dev);
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return (ti_mbox_reg_read(sc, TI_MBOX_MESSAGE(chan)));
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}
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static int
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ti_mbox_write(device_t dev, int chan, uint32_t data)
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{
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int limit = 500;
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struct ti_mbox_softc *sc;
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if (chan < 0 || chan > 7)
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return (EINVAL);
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sc = device_get_softc(dev);
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TI_MBOX_LOCK(sc);
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/* XXX implement interrupt method */
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while (ti_mbox_reg_read(sc, TI_MBOX_FIFOSTATUS(chan)) == 1 &&
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limit--) {
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DELAY(10);
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}
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if (limit == 0) {
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device_printf(dev, "FIFOSTAUS%d stuck\n", chan);
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TI_MBOX_UNLOCK(sc);
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return (EAGAIN);
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}
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ti_mbox_reg_write(sc, TI_MBOX_MESSAGE(chan), data);
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return (0);
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}
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