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Diffstat (limited to 'sys/mips/alchemy/obio.c')
| -rw-r--r-- | sys/mips/alchemy/obio.c | 501 |
1 files changed, 501 insertions, 0 deletions
diff --git a/sys/mips/alchemy/obio.c b/sys/mips/alchemy/obio.c new file mode 100644 index 0000000..03e098d --- /dev/null +++ b/sys/mips/alchemy/obio.c @@ -0,0 +1,501 @@ +/* $NetBSD: obio.c,v 1.11 2003/07/15 00:25:05 lukem Exp $ */ + +/*- + * Copyright (c) 2001, 2002, 2003 Wasabi Systems, Inc. + * All rights reserved. + * + * Written by Jason R. Thorpe for Wasabi Systems, Inc. + * + * 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. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed for the NetBSD Project by + * Wasabi Systems, Inc. + * 4. The name of Wasabi Systems, Inc. may not be used to endorse + * or promote products derived from this software without specific prior + * written permission. + * + * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``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 WASABI SYSTEMS, INC + * 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/interrupt.h> +#include <sys/kernel.h> +#include <sys/module.h> +#include <sys/rman.h> +#include <sys/malloc.h> + +#include <machine/bus.h> + +#include <mips/adm5120/adm5120reg.h> +#include <mips/adm5120/obiovar.h> + +/* MIPS HW interrupts of IRQ/FIQ respectively */ +#define ADM5120_INTR 0 +#define ADM5120_FAST_INTR 1 + +/* Interrupt levels */ +#define INTR_IRQ 0 +#define INTR_FIQ 1 + +int irq_priorities[NIRQS] = { + INTR_IRQ, /* flash */ + INTR_FIQ, /* uart0 */ + INTR_FIQ, /* uart1 */ + INTR_IRQ, /* ahci */ + INTR_IRQ, /* unknown */ + INTR_IRQ, /* unknown */ + INTR_IRQ, /* unknown */ + INTR_IRQ, /* unknown */ + INTR_IRQ, /* unknown */ + INTR_IRQ, /* admsw */ + INTR_IRQ, /* unknown */ + INTR_IRQ, /* unknown */ + INTR_IRQ, /* unknown */ + INTR_IRQ, /* unknown */ + INTR_IRQ, /* unknown */ + INTR_IRQ, /* unknown */ + INTR_IRQ, /* unknown */ + INTR_IRQ, /* unknown */ + INTR_IRQ, /* unknown */ + INTR_IRQ, /* unknown */ + INTR_IRQ, /* unknown */ + INTR_IRQ, /* unknown */ + INTR_IRQ, /* unknown */ + INTR_IRQ, /* unknown */ + INTR_IRQ, /* unknown */ + INTR_IRQ, /* unknown */ + INTR_IRQ, /* unknown */ + INTR_IRQ, /* unknown */ + INTR_IRQ, /* unknown */ + INTR_IRQ, /* unknown */ + INTR_IRQ, /* unknown */ + INTR_IRQ, /* unknown */ +}; + + +#define REG_READ(o) *((volatile uint32_t *)MIPS_PHYS_TO_KSEG1(ADM5120_BASE_ICU + (o))) +#define REG_WRITE(o,v) (REG_READ(o)) = (v) + +static int obio_activate_resource(device_t, device_t, int, int, + struct resource *); +static device_t obio_add_child(device_t, int, const char *, int); +static struct resource * + obio_alloc_resource(device_t, device_t, int, int *, u_long, + u_long, u_long, u_int); +static int obio_attach(device_t); +static int obio_deactivate_resource(device_t, device_t, int, int, + struct resource *); +static struct resource_list * + obio_get_resource_list(device_t, device_t); +static void obio_hinted_child(device_t, const char *, int); +static int obio_intr(void *); +static int obio_probe(device_t); +static int obio_release_resource(device_t, device_t, int, int, + struct resource *); +static int obio_setup_intr(device_t, device_t, struct resource *, int, + driver_filter_t *, driver_intr_t *, void *, void **); +static int obio_teardown_intr(device_t, device_t, struct resource *, + void *); + +static int +obio_probe(device_t dev) +{ + + return (0); +} + +static int +obio_attach(device_t dev) +{ + struct obio_softc *sc = device_get_softc(dev); + int rid; + + sc->oba_mem_rman.rm_type = RMAN_ARRAY; + sc->oba_mem_rman.rm_descr = "OBIO memeory"; + if (rman_init(&sc->oba_mem_rman) != 0 || + rman_manage_region(&sc->oba_mem_rman, OBIO_MEM_START, + OBIO_MEM_START + OBIO_MEM_SIZE) != 0) + panic("obio_attach: failed to set up I/O rman"); + + sc->oba_irq_rman.rm_type = RMAN_ARRAY; + sc->oba_irq_rman.rm_descr = "OBIO IRQ"; + + if (rman_init(&sc->oba_irq_rman) != 0 || + rman_manage_region(&sc->oba_irq_rman, 0, NIRQS-1) != 0) + panic("obio_attach: failed to set up IRQ rman"); + + /* Hook up our interrupt handler. */ + if ((sc->sc_irq = bus_alloc_resource(dev, SYS_RES_IRQ, &rid, + ADM5120_INTR, ADM5120_INTR, 1, + RF_SHAREABLE | RF_ACTIVE)) == NULL) { + device_printf(dev, "unable to allocate IRQ resource\n"); + return (ENXIO); + } + + if ((bus_setup_intr(dev, sc->sc_irq, INTR_TYPE_MISC, obio_intr, NULL, + sc, &sc->sc_ih))) { + device_printf(dev, + "WARNING: unable to register interrupt handler\n"); + return (ENXIO); + } + + /* Hook up our FAST interrupt handler. */ + if ((sc->sc_fast_irq = bus_alloc_resource(dev, SYS_RES_IRQ, &rid, + ADM5120_FAST_INTR, ADM5120_FAST_INTR, 1, + RF_SHAREABLE | RF_ACTIVE)) == NULL) { + device_printf(dev, "unable to allocate IRQ resource\n"); + return (ENXIO); + } + + if ((bus_setup_intr(dev, sc->sc_fast_irq, INTR_TYPE_MISC, obio_intr, + NULL, sc, &sc->sc_fast_ih))) { + device_printf(dev, + "WARNING: unable to register interrupt handler\n"); + return (ENXIO); + } + + /* disable all interrupts */ + REG_WRITE(ICU_ENABLE_REG, ICU_INT_MASK); + + bus_generic_probe(dev); + bus_enumerate_hinted_children(dev); + bus_generic_attach(dev); + + return (0); +} + +static struct resource * +obio_alloc_resource(device_t bus, device_t child, int type, int *rid, + u_long start, u_long end, u_long count, u_int flags) +{ + struct obio_softc *sc = device_get_softc(bus); + struct obio_ivar *ivar = device_get_ivars(child); + struct resource *rv; + struct resource_list_entry *rle; + struct rman *rm; + int isdefault, needactivate, passthrough; + + isdefault = (start == 0UL && end == ~0UL && count == 1); + needactivate = flags & RF_ACTIVE; + passthrough = (device_get_parent(child) != bus); + rle = NULL; + + if (passthrough) + return (BUS_ALLOC_RESOURCE(device_get_parent(bus), child, type, + rid, start, end, count, flags)); + + /* + * If this is an allocation of the "default" range for a given RID, + * and we know what the resources for this device are (ie. they aren't + * maintained by a child bus), then work out the start/end values. + */ + if (isdefault) { + rle = resource_list_find(&ivar->resources, type, *rid); + if (rle == NULL) + return (NULL); + if (rle->res != NULL) { + panic("%s: resource entry is busy", __func__); + } + start = rle->start; + end = rle->end; + count = rle->count; + } + + switch (type) { + case SYS_RES_IRQ: + rm = &sc->oba_irq_rman; + break; + case SYS_RES_MEMORY: + rm = &sc->oba_mem_rman; + break; + default: + printf("%s: unknown resource type %d\n", __func__, type); + return (0); + } + + rv = rman_reserve_resource(rm, start, end, count, flags, child); + if (rv == 0) { + printf("%s: could not reserve resource\n", __func__); + return (0); + } + + rman_set_rid(rv, *rid); + + if (needactivate) { + if (bus_activate_resource(child, type, *rid, rv)) { + printf("%s: could not activate resource\n", __func__); + rman_release_resource(rv); + return (0); + } + } + + return (rv); +} + +static int +obio_activate_resource(device_t bus, device_t child, int type, int rid, + struct resource *r) +{ + + /* + * If this is a memory resource, track the direct mapping + * in the uncached MIPS KSEG1 segment. + */ + if (type == SYS_RES_MEMORY) { + void *vaddr; + + vaddr = (void *)MIPS_PHYS_TO_KSEG1((intptr_t)rman_get_start(r)); + rman_set_virtual(r, vaddr); + rman_set_bustag(r, MIPS_BUS_SPACE_MEM); + rman_set_bushandle(r, (bus_space_handle_t)vaddr); + } + + return (rman_activate_resource(r)); +} + +static int +obio_deactivate_resource(device_t bus, device_t child, int type, int rid, + struct resource *r) +{ + + return (rman_deactivate_resource(r)); +} + +static int +obio_release_resource(device_t dev, device_t child, int type, + int rid, struct resource *r) +{ + struct resource_list *rl; + struct resource_list_entry *rle; + + rl = obio_get_resource_list(dev, child); + if (rl == NULL) + return (EINVAL); + rle = resource_list_find(rl, type, rid); + if (rle == NULL) + return (EINVAL); + rman_release_resource(r); + rle->res = NULL; + + return (0); +} + +static int +obio_setup_intr(device_t dev, device_t child, struct resource *ires, + int flags, driver_filter_t *filt, driver_intr_t *handler, + void *arg, void **cookiep) +{ + struct obio_softc *sc = device_get_softc(dev); + struct intr_event *event; + int irq, error, priority; + uint32_t irqmask; + + irq = rman_get_start(ires); + + if (irq >= NIRQS) + panic("%s: bad irq %d", __func__, irq); + + event = sc->sc_eventstab[irq]; + if (event == NULL) { + error = intr_event_create(&event, (void *)irq, 0, irq, + (mask_fn)mips_mask_irq, (mask_fn)mips_unmask_irq, + NULL, NULL, "obio intr%d:", irq); + + sc->sc_eventstab[irq] = event; + } + else + panic("obio: Can't share IRQs"); + + intr_event_add_handler(event, device_get_nameunit(child), filt, + handler, arg, intr_priority(flags), flags, cookiep); + + irqmask = 1 << irq; + priority = irq_priorities[irq]; + + if (priority == INTR_FIQ) + REG_WRITE(ICU_MODE_REG, REG_READ(ICU_MODE_REG) | irqmask); + else + REG_WRITE(ICU_MODE_REG, REG_READ(ICU_MODE_REG) & ~irqmask); + + /* enable */ + REG_WRITE(ICU_ENABLE_REG, irqmask); + + return (0); +} + +static int +obio_teardown_intr(device_t dev, device_t child, struct resource *ires, + void *cookie) +{ + struct obio_softc *sc = device_get_softc(dev); + int irq, result; + uint32_t irqmask; + + irq = rman_get_start(ires); + if (irq >= NIRQS) + panic("%s: bad irq %d", __func__, irq); + + if (sc->sc_eventstab[irq] == NULL) + panic("Trying to teardown unoccupied IRQ"); + + irqmask = 1 << irq; /* only used as a mask from here on */ + + /* disable this irq in HW */ + REG_WRITE(ICU_DISABLE_REG, irqmask); + + result = intr_event_remove_handler(cookie); + if (!result) { + sc->sc_eventstab[irq] = NULL; + } + + return (result); +} + +static int +obio_intr(void *arg) +{ + struct obio_softc *sc = arg; + struct intr_event *event; + uint32_t irqstat; + int irq; + + irqstat = REG_READ(ICU_FIQ_STATUS_REG); + irqstat |= REG_READ(ICU_STATUS_REG); + + irq = 0; + while (irqstat != 0) { + if ((irqstat & 1) == 1) { + event = sc->sc_eventstab[irq]; + if (!event || TAILQ_EMPTY(&event->ie_handlers)) + continue; + + /* TODO: pass frame as an argument*/ + /* TODO: log stray interrupt */ + intr_event_handle(event, NULL); + } + + irq++; + irqstat >>= 1; + } + + return (FILTER_HANDLED); +} + +static void +obio_hinted_child(device_t bus, const char *dname, int dunit) +{ + device_t child; + long maddr; + int msize; + int irq; + int result; + + child = BUS_ADD_CHILD(bus, 0, dname, dunit); + + /* + * Set hard-wired resources for hinted child using + * specific RIDs. + */ + resource_long_value(dname, dunit, "maddr", &maddr); + resource_int_value(dname, dunit, "msize", &msize); + + + result = bus_set_resource(child, SYS_RES_MEMORY, 0, + maddr, msize); + if (result != 0) + device_printf(bus, "warning: bus_set_resource() failed\n"); + + if (resource_int_value(dname, dunit, "irq", &irq) == 0) { + result = bus_set_resource(child, SYS_RES_IRQ, 0, irq, 1); + if (result != 0) + device_printf(bus, + "warning: bus_set_resource() failed\n"); + } +} + +static device_t +obio_add_child(device_t bus, int order, const char *name, int unit) +{ + device_t child; + struct obio_ivar *ivar; + + ivar = malloc(sizeof(struct obio_ivar), M_DEVBUF, M_WAITOK | M_ZERO); + if (ivar == NULL) { + printf("Failed to allocate ivar\n"); + return (0); + } + resource_list_init(&ivar->resources); + + child = device_add_child_ordered(bus, order, name, unit); + if (child == NULL) { + printf("Can't add child %s%d ordered\n", name, unit); + return (0); + } + + device_set_ivars(child, ivar); + + return (child); +} + +/* + * Helper routine for bus_generic_rl_get_resource/bus_generic_rl_set_resource + * Provides pointer to resource_list for these routines + */ +static struct resource_list * +obio_get_resource_list(device_t dev, device_t child) +{ + struct obio_ivar *ivar; + + ivar = device_get_ivars(child); + return (&(ivar->resources)); +} + +static device_method_t obio_methods[] = { + DEVMETHOD(bus_activate_resource, obio_activate_resource), + DEVMETHOD(bus_add_child, obio_add_child), + DEVMETHOD(bus_alloc_resource, obio_alloc_resource), + DEVMETHOD(bus_deactivate_resource, obio_deactivate_resource), + DEVMETHOD(bus_get_resource_list, obio_get_resource_list), + DEVMETHOD(bus_hinted_child, obio_hinted_child), + DEVMETHOD(bus_release_resource, obio_release_resource), + DEVMETHOD(bus_setup_intr, obio_setup_intr), + DEVMETHOD(bus_teardown_intr, obio_teardown_intr), + DEVMETHOD(device_attach, obio_attach), + DEVMETHOD(device_probe, obio_probe), + DEVMETHOD(bus_get_resource, bus_generic_rl_get_resource), + DEVMETHOD(bus_set_resource, bus_generic_rl_set_resource), + + {0, 0}, +}; + +static driver_t obio_driver = { + "obio", + obio_methods, + sizeof(struct obio_softc), +}; +static devclass_t obio_devclass; + +DRIVER_MODULE(obio, nexus, obio_driver, obio_devclass, 0, 0); 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