5b03aba6c8
files to vendor-provided ones. It should make easier to adopt platform code to new revisions of hardware and to use DTS overlays for various Beaglebone extensions (shields/capes). Original dts filenames were not changed, they're now wrappers over dts files provided by TI. So make sure you update .dtb files on your devices as part of kernel update GPIO addressing was changed: instead of one global /dev/gpioc0 there are per-bank instances of /dev/gpiocX. Each bank has 32 pins so for instance pin 121 on /dev/gpioc0 in old addressing scheme is now pin 25 on /dev/gpioc3 On Pandaboard serial console devices was changed from /dev/ttyu0 to /dev/ttyu2 so you'll have to update /etc/ttys to get login prompt on serial port in multiuser mode. Single user mode serial console should work as-is Differential Revision: https://reviews.freebsd.org/D2146 Reviewed by: rpaulo, ian, Michal Meloun, Svatopluk Kraus
265 lines
6.8 KiB
C
265 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 <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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#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,omap4-mailbox")) {
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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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