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/* $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.
*
* 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: release/9.1.0/sys/mips/rt305x/obio.c 220297 2011-04-03 14:39:55Z adrian $");
#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/rt305x/rt305xreg.h>
#include <mips/rt305x/obiovar.h>
#include <mips/rt305x/rt305x_icvar.h>
/* MIPS HW interrupts of IRQ/FIQ respectively */
#define RT305X_INTR 0
#define RT305X_FAST_INTR 1
/* Interrupt levels */
#define INTR_IRQ 0
#define INTR_FIQ 1
int irq_priorities[NIRQS] = {
INTR_IRQ, /* SYSCTL */
INTR_FIQ, /* TIMER0 */
INTR_FIQ, /* WDTIMER */
INTR_IRQ, /* Illegal Access */
INTR_IRQ, /* PCM */
INTR_IRQ, /* UART */
INTR_IRQ, /* GPIO */
INTR_FIQ, /* GDMA */
INTR_IRQ, /* NAND */
INTR_IRQ, /* Perfomance Counter */
INTR_IRQ, /* I2S */
INTR_IRQ, /* unknown */
INTR_IRQ, /* UARTLITE */
INTR_IRQ, /* unknown */
INTR_IRQ, /* unknown */
INTR_IRQ, /* unknown */
INTR_IRQ, /* unknown */
INTR_IRQ, /* EtherNet Switch */
INTR_FIQ, /* OTG */
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(INTCTL_BASE + (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, u_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_add_res_child(device_t, const char *, int, long, int, int);
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 void
obio_mask_irq(void *source)
{
int irq;
uint32_t irqmask;
irq = (int)source;
irqmask = 1 << irq;
/* disable IRQ */
rt305x_ic_set(IC_INT_DIS, irqmask);
}
static void
obio_unmask_irq(void *source)
{
int irq;
uint32_t irqmask;
irq = (int)source;
irqmask = 1 << irq;
/* enable IRQ */
rt305x_ic_set(IC_INT_ENA, irqmask);
}
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 memory";
if (rman_init(&sc->oba_mem_rman) != 0 ||
rman_manage_region(&sc->oba_mem_rman, OBIO_MEM_START,
OBIO_MEM_END) != 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,
RT305X_INTR, RT305X_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,
RT305X_FAST_INTR, RT305X_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 */
rt305x_ic_set(IC_INT_DIS, IC_INT_MASK|IC_LINE_GLOBAL);
bus_generic_probe(dev);
obio_add_res_child(dev, "rt305x_sysctl", 0,
SYSCTL_BASE, (SYSCTL_END - SYSCTL_BASE + 1),
IC_SYSCTL);
obio_add_res_child(dev, "rt305x_ic", 0,
INTCTL_BASE, (INTCTL_END - INTCTL_BASE + 1),
-1);
#ifdef notyet
obio_add_res_child(dev, "timer",0,
TIMER_BASE, (TIMER_END - TIMER_BASE + 1),
IC_TIMER0);
obio_add_res_child(dev, "rt305x_memc", 0,
MEMCTRL_BASE, (MEMCTRL_END - MEMCTRL_BASE + 1),
-1);
obio_add_res_child(dev, "pcm", 0,
PCM_BASE, (PCM_END - PCM_BASE + 1),
IC_PCM);
obio_add_res_child(dev, "uart", 0,
UART_BASE, (UART_END - UART_BASE + 1),
IC_UART);
#endif
obio_add_res_child(dev, "gpio", 0,
PIO_BASE, (PIO_END - PIO_BASE + 1),
IC_PIO);
#ifdef notyet
obio_add_res_child(dev, "rt305x_dma", 0,
GDMA_BASE, (GDMA_END - GDMA_BASE + 1),
IC_DMA);
obio_add_res_child(dev, "rt305x_nandc", 0,
NANDFC_BASE, (NANDFC_END - NANDFC_BASE + 1),
IC_NAND);
obio_add_res_child(dev, "i2c", 0,
I2C_BASE, (I2C_END - I2C_BASE + 1),
-1);
obio_add_res_child(dev, "i2s", 0,
I2S_BASE, (I2S_END - I2S_BASE + 1),
IC_I2S);
obio_add_res_child(dev, "spi", 0,
SPI_BASE, (SPI_END - SPI_BASE + 1),
-1);
#endif
obio_add_res_child(dev, "uart", 1,
UARTLITE_BASE, (UARTLITE_END - UARTLITE_BASE + 1),
IC_UARTLITE);
obio_add_res_child(dev, "cfi", 0,
FLASH_BASE, (FLASH_END - FLASH_BASE + 1),
-1);
obio_add_res_child(dev, "dotg", 0,
USB_OTG_BASE, (USB_OTG_END - USB_OTG_BASE + 1),
IC_OTG);
obio_add_res_child(dev, "switch", 0,
ETHSW_BASE, (ETHSW_END - ETHSW_BASE + 1),
IC_ETHSW);
bus_enumerate_hinted_children(dev);
bus_generic_attach(dev);
/* enable IC */
rt305x_ic_set(IC_INT_ENA, IC_LINE_GLOBAL);
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_generic);
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,
obio_mask_irq, obio_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)
rt305x_ic_set(IC_INTTYPE, rt305x_ic_get(IC_INTTYPE) | irqmask);
else
rt305x_ic_set(IC_INTTYPE, rt305x_ic_get(IC_INTTYPE) & ~irqmask);
/* enable */
obio_unmask_irq((void*)irq);
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, priority;
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);
priority = irq_priorities[irq];
if (priority == INTR_FIQ)
rt305x_ic_set(IC_INTTYPE, rt305x_ic_get(IC_INTTYPE) & ~irqmask);
else
rt305x_ic_set(IC_INTTYPE, rt305x_ic_get(IC_INTTYPE) | irqmask);
/* disable */
obio_mask_irq((void*)irq);
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 = rt305x_ic_get(IC_IRQ0STAT);
irqstat |= rt305x_ic_get(IC_IRQ1STAT);
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_add_res_child(device_t bus, const char *dname, int dunit,
long maddr, int msize, int irq)
{
device_t child;
int result;
child = BUS_ADD_CHILD(bus, 0, dname, dunit);
result = bus_set_resource(child, SYS_RES_MEMORY, 0,
maddr, msize);
if (result != 0)
device_printf(bus, "warning: bus_set_resource() failed\n");
if (irq != -1) {
result = bus_set_resource(child, SYS_RES_IRQ, 0, irq, 1);
if (result != 0)
device_printf(bus,
"warning: bus_set_resource() failed\n");
}
}
static void
obio_hinted_child(device_t bus, const char *dname, int dunit)
{
long maddr;
int msize;
int irq;
/*
* Set hard-wired resources for hinted child using
* specific RIDs.
*/
resource_long_value(dname, dunit, "maddr", &maddr);
resource_int_value(dname, dunit, "msize", &msize);
if (resource_int_value(dname, dunit, "irq", &irq) == 0) irq = -1;
obio_add_res_child(bus, dname, dunit, maddr, msize, irq);
}
static device_t
obio_add_child(device_t bus, u_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 int
obio_print_all_resources(device_t dev)
{
struct obio_ivar *ivar = device_get_ivars(dev);
struct resource_list *rl = &ivar->resources;
int retval = 0;
if (STAILQ_FIRST(rl))
retval += printf(" at");
retval += resource_list_print_type(rl, "mem", SYS_RES_MEMORY, "%#lx");
retval += resource_list_print_type(rl, "irq", SYS_RES_IRQ, "%ld");
return (retval);
}
static int
obio_print_child(device_t bus, device_t child)
{
int retval = 0;
retval += bus_print_child_header(bus, child);
retval += obio_print_all_resources(child);
if (device_get_flags(child))
retval += printf(" flags %#x", device_get_flags(child));
retval += printf(" on %s\n", device_get_nameunit(bus));
return (retval);
}
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_print_child, obio_print_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);