795576f81b
This aids in debugging.
542 lines
14 KiB
C
542 lines
14 KiB
C
/*-
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* Copyright (c) 2009, Oleksandr Tymoshenko <gonzo@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 unmodified, this list of conditions, and the following
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* 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 AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR 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, STRICT
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* LIABILITY, 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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#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/interrupt.h>
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#include <sys/kernel.h>
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#include <sys/module.h>
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#include <sys/rman.h>
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#include <sys/malloc.h>
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#include <sys/pcpu.h>
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#include <sys/proc.h>
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#include <sys/pmc.h>
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#include <sys/pmckern.h>
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#include <machine/bus.h>
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#include <machine/intr_machdep.h>
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#include <mips/atheros/apbvar.h>
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#include <mips/atheros/ar71xxreg.h>
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#include <mips/atheros/ar71xx_setup.h>
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#define APB_INTR_PMC 5
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#undef APB_DEBUG
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#ifdef APB_DEBUG
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#define dprintf printf
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#else
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#define dprintf(x, arg...)
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#endif /* APB_DEBUG */
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#define DEVTOAPB(dev) ((struct apb_ivar *) device_get_ivars(dev))
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static int apb_activate_resource(device_t, device_t, int, int,
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struct resource *);
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static device_t apb_add_child(device_t, u_int, const char *, int);
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static struct resource *
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apb_alloc_resource(device_t, device_t, int, int *, u_long,
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u_long, u_long, u_int);
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static int apb_attach(device_t);
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static int apb_deactivate_resource(device_t, device_t, int, int,
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struct resource *);
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static struct resource_list *
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apb_get_resource_list(device_t, device_t);
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static void apb_hinted_child(device_t, const char *, int);
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static int apb_filter(void *);
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static int apb_probe(device_t);
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static int apb_release_resource(device_t, device_t, int, int,
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struct resource *);
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static int apb_setup_intr(device_t, device_t, struct resource *, int,
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driver_filter_t *, driver_intr_t *, void *, void **);
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static int apb_teardown_intr(device_t, device_t, struct resource *,
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void *);
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static void
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apb_mask_irq(void *source)
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{
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unsigned int irq = (unsigned int)source;
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uint32_t reg;
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reg = ATH_READ_REG(AR71XX_MISC_INTR_MASK);
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ATH_WRITE_REG(AR71XX_MISC_INTR_MASK, reg & ~(1 << irq));
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}
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static void
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apb_unmask_irq(void *source)
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{
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uint32_t reg;
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unsigned int irq = (unsigned int)source;
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reg = ATH_READ_REG(AR71XX_MISC_INTR_MASK);
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ATH_WRITE_REG(AR71XX_MISC_INTR_MASK, reg | (1 << irq));
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}
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static int
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apb_probe(device_t dev)
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{
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return (BUS_PROBE_NOWILDCARD);
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}
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static int
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apb_attach(device_t dev)
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{
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struct apb_softc *sc = device_get_softc(dev);
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int rid = 0;
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device_set_desc(dev, "APB Bus bridge");
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sc->apb_mem_rman.rm_type = RMAN_ARRAY;
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sc->apb_mem_rman.rm_descr = "APB memory window";
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if (rman_init(&sc->apb_mem_rman) != 0 ||
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rman_manage_region(&sc->apb_mem_rman,
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AR71XX_APB_BASE,
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AR71XX_APB_BASE + AR71XX_APB_SIZE - 1) != 0)
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panic("apb_attach: failed to set up memory rman");
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sc->apb_irq_rman.rm_type = RMAN_ARRAY;
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sc->apb_irq_rman.rm_descr = "APB IRQ";
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if (rman_init(&sc->apb_irq_rman) != 0 ||
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rman_manage_region(&sc->apb_irq_rman,
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APB_IRQ_BASE, APB_IRQ_END) != 0)
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panic("apb_attach: failed to set up IRQ rman");
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if ((sc->sc_misc_irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid,
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RF_SHAREABLE | RF_ACTIVE)) == NULL) {
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device_printf(dev, "unable to allocate IRQ resource\n");
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return (ENXIO);
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}
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if ((bus_setup_intr(dev, sc->sc_misc_irq, INTR_TYPE_MISC,
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apb_filter, NULL, sc, &sc->sc_misc_ih))) {
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device_printf(dev,
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"WARNING: unable to register interrupt handler\n");
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return (ENXIO);
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}
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bus_generic_probe(dev);
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bus_enumerate_hinted_children(dev);
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bus_generic_attach(dev);
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/*
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* Unmask performance counter IRQ
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*/
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apb_unmask_irq((void*)APB_INTR_PMC);
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sc->sc_intr_counter[APB_INTR_PMC] = mips_intrcnt_create("apb irq5: pmc");
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return (0);
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}
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static struct resource *
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apb_alloc_resource(device_t bus, device_t child, int type, int *rid,
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u_long start, u_long end, u_long count, u_int flags)
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{
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struct apb_softc *sc = device_get_softc(bus);
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struct apb_ivar *ivar = device_get_ivars(child);
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struct resource *rv;
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struct resource_list_entry *rle;
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struct rman *rm;
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int isdefault, needactivate, passthrough;
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isdefault = (start == 0UL && end == ~0UL);
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needactivate = flags & RF_ACTIVE;
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/*
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* Pass memory requests to nexus device
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*/
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passthrough = (device_get_parent(child) != bus);
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rle = NULL;
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dprintf("%s: entry (%p, %p, %d, %d, %p, %p, %ld, %d)\n",
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__func__, bus, child, type, *rid, (void *)(intptr_t)start,
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(void *)(intptr_t)end, count, flags);
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if (passthrough)
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return (BUS_ALLOC_RESOURCE(device_get_parent(bus), child, type,
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rid, start, end, count, flags));
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/*
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* If this is an allocation of the "default" range for a given RID,
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* and we know what the resources for this device are (ie. they aren't
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* maintained by a child bus), then work out the start/end values.
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*/
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if (isdefault) {
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rle = resource_list_find(&ivar->resources, type, *rid);
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if (rle == NULL) {
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return (NULL);
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}
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if (rle->res != NULL) {
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panic("%s: resource entry is busy", __func__);
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}
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start = rle->start;
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end = rle->end;
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count = rle->count;
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dprintf("%s: default resource (%p, %p, %ld)\n",
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__func__, (void *)(intptr_t)start,
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(void *)(intptr_t)end, count);
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}
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switch (type) {
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case SYS_RES_IRQ:
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rm = &sc->apb_irq_rman;
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break;
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case SYS_RES_MEMORY:
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rm = &sc->apb_mem_rman;
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break;
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default:
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printf("%s: unknown resource type %d\n", __func__, type);
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return (0);
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}
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rv = rman_reserve_resource(rm, start, end, count, flags, child);
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if (rv == 0) {
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printf("%s: could not reserve resource\n", __func__);
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return (0);
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}
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rman_set_rid(rv, *rid);
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if (needactivate) {
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if (bus_activate_resource(child, type, *rid, rv)) {
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printf("%s: could not activate resource\n", __func__);
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rman_release_resource(rv);
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return (0);
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}
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}
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return (rv);
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}
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static int
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apb_activate_resource(device_t bus, device_t child, int type, int rid,
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struct resource *r)
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{
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/* XXX: should we mask/unmask IRQ here? */
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return (BUS_ACTIVATE_RESOURCE(device_get_parent(bus), child,
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type, rid, r));
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}
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static int
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apb_deactivate_resource(device_t bus, device_t child, int type, int rid,
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struct resource *r)
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{
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/* XXX: should we mask/unmask IRQ here? */
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return (BUS_DEACTIVATE_RESOURCE(device_get_parent(bus), child,
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type, rid, r));
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}
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static int
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apb_release_resource(device_t dev, device_t child, int type,
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int rid, struct resource *r)
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{
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struct resource_list *rl;
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struct resource_list_entry *rle;
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rl = apb_get_resource_list(dev, child);
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if (rl == NULL)
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return (EINVAL);
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rle = resource_list_find(rl, type, rid);
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if (rle == NULL)
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return (EINVAL);
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rman_release_resource(r);
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rle->res = NULL;
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return (0);
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}
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static int
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apb_setup_intr(device_t bus, device_t child, struct resource *ires,
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int flags, driver_filter_t *filt, driver_intr_t *handler,
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void *arg, void **cookiep)
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{
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struct apb_softc *sc = device_get_softc(bus);
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struct intr_event *event;
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int irq, error;
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irq = rman_get_start(ires);
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if (irq > APB_IRQ_END)
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panic("%s: bad irq %d", __func__, irq);
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event = sc->sc_eventstab[irq];
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if (event == NULL) {
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error = intr_event_create(&event, (void *)irq, 0, irq,
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apb_mask_irq, apb_unmask_irq,
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NULL, NULL,
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"apb intr%d:", irq);
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if (error == 0) {
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sc->sc_eventstab[irq] = event;
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sc->sc_intr_counter[irq] =
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mips_intrcnt_create(event->ie_name);
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}
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else
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return (error);
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}
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intr_event_add_handler(event, device_get_nameunit(child), filt,
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handler, arg, intr_priority(flags), flags, cookiep);
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mips_intrcnt_setname(sc->sc_intr_counter[irq], event->ie_fullname);
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apb_unmask_irq((void*)irq);
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return (0);
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}
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static int
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apb_teardown_intr(device_t dev, device_t child, struct resource *ires,
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void *cookie)
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{
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struct apb_softc *sc = device_get_softc(dev);
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int irq, result;
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irq = rman_get_start(ires);
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if (irq > APB_IRQ_END)
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panic("%s: bad irq %d", __func__, irq);
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if (sc->sc_eventstab[irq] == NULL)
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panic("Trying to teardown unoccupied IRQ");
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apb_mask_irq((void*)irq);
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result = intr_event_remove_handler(cookie);
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if (!result)
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sc->sc_eventstab[irq] = NULL;
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return (result);
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}
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static int
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apb_filter(void *arg)
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{
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struct apb_softc *sc = arg;
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struct intr_event *event;
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uint32_t reg, irq;
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struct thread *td;
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struct trapframe *tf;
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reg = ATH_READ_REG(AR71XX_MISC_INTR_STATUS);
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for (irq = 0; irq < APB_NIRQS; irq++) {
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if (reg & (1 << irq)) {
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switch (ar71xx_soc) {
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case AR71XX_SOC_AR7240:
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case AR71XX_SOC_AR7241:
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case AR71XX_SOC_AR7242:
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case AR71XX_SOC_AR9330:
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case AR71XX_SOC_AR9331:
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case AR71XX_SOC_AR9341:
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case AR71XX_SOC_AR9342:
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case AR71XX_SOC_AR9344:
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case AR71XX_SOC_QCA9533:
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case AR71XX_SOC_QCA9533_V2:
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case AR71XX_SOC_QCA9556:
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case AR71XX_SOC_QCA9558:
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/* ACK/clear the given interrupt */
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ATH_WRITE_REG(AR71XX_MISC_INTR_STATUS,
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(1 << irq));
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break;
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default:
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/* fallthrough */
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break;
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}
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event = sc->sc_eventstab[irq];
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/* always count interrupts; spurious or otherwise */
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mips_intrcnt_inc(sc->sc_intr_counter[irq]);
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if (!event || TAILQ_EMPTY(&event->ie_handlers)) {
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if (irq == APB_INTR_PMC) {
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td = PCPU_GET(curthread);
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tf = td->td_intr_frame;
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if (pmc_intr)
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(*pmc_intr)(PCPU_GET(cpuid), tf);
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continue;
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}
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/* Ignore timer interrupts */
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if (irq != 0 && irq != 8 && irq != 9 && irq != 10)
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printf("Stray APB IRQ %d\n", irq);
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continue;
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}
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intr_event_handle(event, PCPU_GET(curthread)->td_intr_frame);
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}
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}
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return (FILTER_HANDLED);
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}
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static void
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apb_hinted_child(device_t bus, const char *dname, int dunit)
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{
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device_t child;
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long maddr;
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int msize;
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int irq;
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int result;
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int mem_hints_count;
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child = BUS_ADD_CHILD(bus, 0, dname, dunit);
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/*
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* Set hard-wired resources for hinted child using
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* specific RIDs.
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*/
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mem_hints_count = 0;
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if (resource_long_value(dname, dunit, "maddr", &maddr) == 0)
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mem_hints_count++;
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if (resource_int_value(dname, dunit, "msize", &msize) == 0)
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mem_hints_count++;
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/* check if all info for mem resource has been provided */
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if ((mem_hints_count > 0) && (mem_hints_count < 2)) {
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printf("Either maddr or msize hint is missing for %s%d\n",
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dname, dunit);
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} else if (mem_hints_count) {
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result = bus_set_resource(child, SYS_RES_MEMORY, 0,
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maddr, msize);
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if (result != 0)
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device_printf(bus,
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"warning: bus_set_resource() failed\n");
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}
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if (resource_int_value(dname, dunit, "irq", &irq) == 0) {
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result = bus_set_resource(child, SYS_RES_IRQ, 0, irq, 1);
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if (result != 0)
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device_printf(bus,
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"warning: bus_set_resource() failed\n");
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}
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}
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static device_t
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apb_add_child(device_t bus, u_int order, const char *name, int unit)
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{
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device_t child;
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struct apb_ivar *ivar;
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ivar = malloc(sizeof(struct apb_ivar), M_DEVBUF, M_WAITOK | M_ZERO);
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if (ivar == NULL) {
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printf("Failed to allocate ivar\n");
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return (0);
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}
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resource_list_init(&ivar->resources);
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child = device_add_child_ordered(bus, order, name, unit);
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if (child == NULL) {
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printf("Can't add child %s%d ordered\n", name, unit);
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return (0);
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}
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device_set_ivars(child, ivar);
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return (child);
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}
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/*
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* Helper routine for bus_generic_rl_get_resource/bus_generic_rl_set_resource
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* Provides pointer to resource_list for these routines
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*/
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static struct resource_list *
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apb_get_resource_list(device_t dev, device_t child)
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{
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struct apb_ivar *ivar;
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ivar = device_get_ivars(child);
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return (&(ivar->resources));
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}
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static int
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apb_print_all_resources(device_t dev)
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{
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struct apb_ivar *ndev = DEVTOAPB(dev);
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struct resource_list *rl = &ndev->resources;
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int retval = 0;
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if (STAILQ_FIRST(rl))
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retval += printf(" at");
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retval += resource_list_print_type(rl, "mem", SYS_RES_MEMORY, "%#lx");
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retval += resource_list_print_type(rl, "irq", SYS_RES_IRQ, "%ld");
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return (retval);
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}
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static int
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apb_print_child(device_t bus, device_t child)
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{
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int retval = 0;
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retval += bus_print_child_header(bus, child);
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retval += apb_print_all_resources(child);
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if (device_get_flags(child))
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retval += printf(" flags %#x", device_get_flags(child));
|
|
retval += printf(" on %s\n", device_get_nameunit(bus));
|
|
|
|
return (retval);
|
|
}
|
|
|
|
|
|
static device_method_t apb_methods[] = {
|
|
DEVMETHOD(bus_activate_resource, apb_activate_resource),
|
|
DEVMETHOD(bus_add_child, apb_add_child),
|
|
DEVMETHOD(bus_alloc_resource, apb_alloc_resource),
|
|
DEVMETHOD(bus_deactivate_resource, apb_deactivate_resource),
|
|
DEVMETHOD(bus_get_resource_list, apb_get_resource_list),
|
|
DEVMETHOD(bus_hinted_child, apb_hinted_child),
|
|
DEVMETHOD(bus_release_resource, apb_release_resource),
|
|
DEVMETHOD(bus_setup_intr, apb_setup_intr),
|
|
DEVMETHOD(bus_teardown_intr, apb_teardown_intr),
|
|
DEVMETHOD(device_attach, apb_attach),
|
|
DEVMETHOD(device_probe, apb_probe),
|
|
DEVMETHOD(bus_get_resource, bus_generic_rl_get_resource),
|
|
DEVMETHOD(bus_set_resource, bus_generic_rl_set_resource),
|
|
DEVMETHOD(bus_print_child, apb_print_child),
|
|
|
|
DEVMETHOD_END
|
|
};
|
|
|
|
static driver_t apb_driver = {
|
|
"apb",
|
|
apb_methods,
|
|
sizeof(struct apb_softc),
|
|
};
|
|
static devclass_t apb_devclass;
|
|
|
|
DRIVER_MODULE(apb, nexus, apb_driver, apb_devclass, 0, 0);
|