c71d7e6735
Also, fix several problems with the kqueue notification. Submitted by: Manuel Stühn freebsdnewbie at freenet.de
321 lines
8.4 KiB
C
321 lines
8.4 KiB
C
/*-
|
|
* Copyright (c) 2013 Rui Paulo <rpaulo@FreeBSD.org>
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
|
|
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
|
|
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
|
|
* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
|
|
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
|
|
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
|
|
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
|
|
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
|
|
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
|
* POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
#include <sys/cdefs.h>
|
|
__FBSDID("$FreeBSD$");
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/bus.h>
|
|
#include <sys/conf.h>
|
|
#include <sys/kernel.h>
|
|
#include <sys/module.h>
|
|
#include <sys/malloc.h>
|
|
#include <sys/rman.h>
|
|
#include <sys/event.h>
|
|
#include <sys/selinfo.h>
|
|
#include <machine/bus.h>
|
|
#include <machine/cpu.h>
|
|
#include <machine/frame.h>
|
|
#include <machine/intr.h>
|
|
|
|
#include <dev/fdt/fdt_common.h>
|
|
#include <dev/ofw/openfirm.h>
|
|
#include <dev/ofw/ofw_bus.h>
|
|
#include <dev/ofw/ofw_bus_subr.h>
|
|
|
|
#include <machine/bus.h>
|
|
|
|
#include <arm/ti/ti_prcm.h>
|
|
#include <arm/ti/ti_pruss.h>
|
|
|
|
#ifdef DEBUG
|
|
#define DPRINTF(fmt, ...) do { \
|
|
printf("%s: ", __func__); \
|
|
printf(fmt, __VA_ARGS__); \
|
|
} while (0)
|
|
#else
|
|
#define DPRINTF(fmt, ...)
|
|
#endif
|
|
|
|
static device_probe_t ti_pruss_probe;
|
|
static device_attach_t ti_pruss_attach;
|
|
static device_detach_t ti_pruss_detach;
|
|
static void ti_pruss_intr(void *);
|
|
static d_open_t ti_pruss_open;
|
|
static d_mmap_t ti_pruss_mmap;
|
|
static void ti_pruss_kq_read_detach(struct knote *);
|
|
static int ti_pruss_kq_read_event(struct knote *, long);
|
|
static d_kqfilter_t ti_pruss_kqfilter;
|
|
|
|
#define TI_PRUSS_IRQS 8
|
|
|
|
struct ti_pruss_softc {
|
|
struct mtx sc_mtx;
|
|
struct resource *sc_mem_res;
|
|
struct resource *sc_irq_res[TI_PRUSS_IRQS];
|
|
void *sc_intr[TI_PRUSS_IRQS];
|
|
bus_space_tag_t sc_bt;
|
|
bus_space_handle_t sc_bh;
|
|
struct cdev *sc_pdev;
|
|
struct selinfo sc_selinfo;
|
|
};
|
|
|
|
static struct cdevsw ti_pruss_cdevsw = {
|
|
.d_version = D_VERSION,
|
|
.d_name = "ti_pruss",
|
|
.d_open = ti_pruss_open,
|
|
.d_mmap = ti_pruss_mmap,
|
|
.d_kqfilter = ti_pruss_kqfilter,
|
|
};
|
|
|
|
static device_method_t ti_pruss_methods[] = {
|
|
DEVMETHOD(device_probe, ti_pruss_probe),
|
|
DEVMETHOD(device_attach, ti_pruss_attach),
|
|
DEVMETHOD(device_detach, ti_pruss_detach),
|
|
|
|
DEVMETHOD_END
|
|
};
|
|
|
|
static driver_t ti_pruss_driver = {
|
|
"ti_pruss",
|
|
ti_pruss_methods,
|
|
sizeof(struct ti_pruss_softc)
|
|
};
|
|
|
|
static devclass_t ti_pruss_devclass;
|
|
|
|
DRIVER_MODULE(ti_pruss, simplebus, ti_pruss_driver, ti_pruss_devclass, 0, 0);
|
|
|
|
static struct resource_spec ti_pruss_irq_spec[] = {
|
|
{ SYS_RES_IRQ, 0, RF_ACTIVE },
|
|
{ SYS_RES_IRQ, 1, RF_ACTIVE },
|
|
{ SYS_RES_IRQ, 2, RF_ACTIVE },
|
|
{ SYS_RES_IRQ, 3, RF_ACTIVE },
|
|
{ SYS_RES_IRQ, 4, RF_ACTIVE },
|
|
{ SYS_RES_IRQ, 5, RF_ACTIVE },
|
|
{ SYS_RES_IRQ, 6, RF_ACTIVE },
|
|
{ SYS_RES_IRQ, 7, RF_ACTIVE },
|
|
{ -1, 0, 0 }
|
|
};
|
|
CTASSERT(TI_PRUSS_IRQS == nitems(ti_pruss_irq_spec) - 1);
|
|
|
|
static struct ti_pruss_irq_arg {
|
|
int irq;
|
|
struct ti_pruss_softc *sc;
|
|
} ti_pruss_irq_args[TI_PRUSS_IRQS];
|
|
|
|
static __inline uint32_t
|
|
ti_pruss_reg_read(struct ti_pruss_softc *sc, uint32_t reg)
|
|
{
|
|
return (bus_space_read_4(sc->sc_bt, sc->sc_bh, reg));
|
|
}
|
|
|
|
static __inline void
|
|
ti_pruss_reg_write(struct ti_pruss_softc *sc, uint32_t reg, uint32_t val)
|
|
{
|
|
bus_space_write_4(sc->sc_bt, sc->sc_bh, reg, val);
|
|
}
|
|
|
|
static int
|
|
ti_pruss_probe(device_t dev)
|
|
{
|
|
|
|
if (!ofw_bus_status_okay(dev))
|
|
return (ENXIO);
|
|
|
|
if (ofw_bus_is_compatible(dev, "ti,pruss-v1") ||
|
|
ofw_bus_is_compatible(dev, "ti,pruss-v2")) {
|
|
device_set_desc(dev, "TI Programmable Realtime Unit Subsystem");
|
|
return (BUS_PROBE_DEFAULT);
|
|
}
|
|
|
|
return (ENXIO);
|
|
}
|
|
|
|
static int
|
|
ti_pruss_attach(device_t dev)
|
|
{
|
|
struct ti_pruss_softc *sc;
|
|
int rid, i;
|
|
|
|
if (ti_prcm_clk_enable(PRUSS_CLK) != 0) {
|
|
device_printf(dev, "could not enable PRUSS clock\n");
|
|
return (ENXIO);
|
|
}
|
|
sc = device_get_softc(dev);
|
|
rid = 0;
|
|
mtx_init(&sc->sc_mtx, "TI PRUSS", NULL, MTX_DEF);
|
|
knlist_init_mtx(&sc->sc_selinfo.si_note, &sc->sc_mtx);
|
|
sc->sc_mem_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid,
|
|
RF_ACTIVE);
|
|
if (sc->sc_mem_res == NULL) {
|
|
device_printf(dev, "could not allocate memory resource\n");
|
|
return (ENXIO);
|
|
}
|
|
sc->sc_bt = rman_get_bustag(sc->sc_mem_res);
|
|
sc->sc_bh = rman_get_bushandle(sc->sc_mem_res);
|
|
if (bus_alloc_resources(dev, ti_pruss_irq_spec, sc->sc_irq_res) != 0) {
|
|
device_printf(dev, "could not allocate interrupt resource\n");
|
|
ti_pruss_detach(dev);
|
|
return (ENXIO);
|
|
}
|
|
for (i = 0; i < TI_PRUSS_IRQS; i++) {
|
|
ti_pruss_irq_args[i].irq = i;
|
|
ti_pruss_irq_args[i].sc = sc;
|
|
if (bus_setup_intr(dev, sc->sc_irq_res[i],
|
|
INTR_MPSAFE | INTR_TYPE_MISC,
|
|
NULL, ti_pruss_intr, &ti_pruss_irq_args[i],
|
|
&sc->sc_intr[i]) != 0) {
|
|
device_printf(dev,
|
|
"unable to setup the interrupt handler\n");
|
|
ti_pruss_detach(dev);
|
|
return (ENXIO);
|
|
}
|
|
}
|
|
if (ti_pruss_reg_read(sc, PRUSS_AM18XX_INTC) == PRUSS_AM18XX_REV)
|
|
device_printf(dev, "AM18xx PRU-ICSS\n");
|
|
else if (ti_pruss_reg_read(sc, PRUSS_AM33XX_INTC) == PRUSS_AM33XX_REV)
|
|
device_printf(dev, "AM33xx PRU-ICSS\n");
|
|
|
|
sc->sc_pdev = make_dev(&ti_pruss_cdevsw, 0, UID_ROOT, GID_WHEEL,
|
|
0600, "pruss%d", device_get_unit(dev));
|
|
sc->sc_pdev->si_drv1 = dev;
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
ti_pruss_detach(device_t dev)
|
|
{
|
|
struct ti_pruss_softc *sc;
|
|
int i;
|
|
|
|
sc = device_get_softc(dev);
|
|
for (i = 0; i < TI_PRUSS_IRQS; i++) {
|
|
if (sc->sc_intr[i])
|
|
bus_teardown_intr(dev, sc->sc_irq_res[i], sc->sc_intr[i]);
|
|
if (sc->sc_irq_res[i])
|
|
bus_release_resource(dev, SYS_RES_IRQ,
|
|
rman_get_rid(sc->sc_irq_res[i]),
|
|
sc->sc_irq_res[i]);
|
|
}
|
|
knlist_clear(&sc->sc_selinfo.si_note, 0);
|
|
knlist_destroy(&sc->sc_selinfo.si_note);
|
|
mtx_destroy(&sc->sc_mtx);
|
|
if (sc->sc_mem_res)
|
|
bus_release_resource(dev, SYS_RES_MEMORY, rman_get_rid(sc->sc_mem_res),
|
|
sc->sc_mem_res);
|
|
if (sc->sc_pdev)
|
|
destroy_dev(sc->sc_pdev);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static void
|
|
ti_pruss_intr(void *arg)
|
|
{
|
|
int val;
|
|
struct ti_pruss_irq_arg *iap = arg;
|
|
struct ti_pruss_softc *sc = iap->sc;
|
|
/*
|
|
* Interrupts pr1_host_intr[0:7] are mapped to
|
|
* Host-2 to Host-9 of PRU-ICSS IRQ-controller.
|
|
*/
|
|
const int pru_int = iap->irq + 2;
|
|
const int pru_int_mask = (1 << pru_int);
|
|
|
|
val = ti_pruss_reg_read(sc, PRUSS_AM33XX_INTC + PRUSS_INTC_HIER);
|
|
DPRINTF("interrupt %p, %d", sc, pru_int);
|
|
if (!(val & pru_int_mask))
|
|
return;
|
|
ti_pruss_reg_write(sc, PRUSS_AM33XX_INTC + PRUSS_INTC_HIDISR,
|
|
pru_int);
|
|
KNOTE_UNLOCKED(&sc->sc_selinfo.si_note, pru_int);
|
|
}
|
|
|
|
static int
|
|
ti_pruss_open(struct cdev *cdev __unused, int oflags __unused,
|
|
int devtype __unused, struct thread *td __unused)
|
|
{
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
ti_pruss_mmap(struct cdev *cdev, vm_ooffset_t offset, vm_paddr_t *paddr,
|
|
int nprot, vm_memattr_t *memattr)
|
|
{
|
|
device_t dev = cdev->si_drv1;
|
|
struct ti_pruss_softc *sc = device_get_softc(dev);
|
|
|
|
if (offset > rman_get_size(sc->sc_mem_res))
|
|
return (-1);
|
|
*paddr = rman_get_start(sc->sc_mem_res) + offset;
|
|
*memattr = VM_MEMATTR_UNCACHEABLE;
|
|
|
|
return (0);
|
|
}
|
|
|
|
static struct filterops ti_pruss_kq_read = {
|
|
.f_isfd = 1,
|
|
.f_detach = ti_pruss_kq_read_detach,
|
|
.f_event = ti_pruss_kq_read_event,
|
|
};
|
|
|
|
static void
|
|
ti_pruss_kq_read_detach(struct knote *kn)
|
|
{
|
|
struct ti_pruss_softc *sc = kn->kn_hook;
|
|
|
|
knlist_remove(&sc->sc_selinfo.si_note, kn, 0);
|
|
}
|
|
|
|
static int
|
|
ti_pruss_kq_read_event(struct knote *kn, long hint)
|
|
{
|
|
kn->kn_data = hint;
|
|
|
|
return (hint);
|
|
}
|
|
|
|
static int
|
|
ti_pruss_kqfilter(struct cdev *cdev, struct knote *kn)
|
|
{
|
|
device_t dev = cdev->si_drv1;
|
|
struct ti_pruss_softc *sc = device_get_softc(dev);
|
|
|
|
switch (kn->kn_filter) {
|
|
case EVFILT_READ:
|
|
kn->kn_hook = sc;
|
|
kn->kn_fop = &ti_pruss_kq_read;
|
|
knlist_add(&sc->sc_selinfo.si_note, kn, 1);
|
|
break;
|
|
default:
|
|
return (EINVAL);
|
|
}
|
|
|
|
return (0);
|
|
}
|