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/* $NetBSD: ixp425.c,v 1.10 2005/12/11 12:16:51 christos Exp $ */
/*
* Copyright (c) 2003
* Ichiro FUKUHARA <ichiro@ichiro.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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Ichiro FUKUHARA.
* 4. The name of the company nor the name of the author may be used to
* endorse or promote products derived from this software without specific
* prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY ICHIRO FUKUHARA ``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 ICHIRO FUKUHARA OR THE VOICES IN HIS HEAD 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/arm/xscale/ixp425/ixp425.c 215319 2010-11-14 20:41:22Z thompsa $");
#include "opt_ddb.h"
#define _ARM32_BUS_DMA_PRIVATE
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/bus.h>
#include <sys/kernel.h>
#include <sys/module.h>
#include <sys/malloc.h>
#include <sys/rman.h>
#include <machine/bus.h>
#include <machine/intr.h>
#include <vm/vm.h>
#include <vm/pmap.h>
#include <arm/xscale/ixp425/ixp425reg.h>
#include <arm/xscale/ixp425/ixp425var.h>
#include <arm/xscale/ixp425/ixp425_intr.h>
#include <dev/pci/pcireg.h>
volatile uint32_t intr_enabled;
uint32_t intr_steer = 0;
/* ixp43x et. al have +32 IRQ's */
volatile uint32_t intr_enabled2;
uint32_t intr_steer2 = 0;
struct ixp425_softc *ixp425_softc = NULL;
struct mtx ixp425_gpio_mtx;
static int ixp425_probe(device_t);
static void ixp425_identify(driver_t *, device_t);
static int ixp425_attach(device_t);
/*
* Return a mask of the "fuse" bits that identify
* which h/w features are present.
* NB: assumes the expansion bus is mapped.
*/
uint32_t
ixp4xx_read_feature_bits(void)
{
uint32_t bits = ~IXPREG(IXP425_EXP_VBASE + EXP_FCTRL_OFFSET);
bits &= ~EXP_FCTRL_RESVD;
if (!cpu_is_ixp46x())
bits &= ~EXP_FCTRL_IXP46X_ONLY;
return bits;
}
void
ixp4xx_write_feature_bits(uint32_t v)
{
IXPREG(IXP425_EXP_VBASE + EXP_FCTRL_OFFSET) = ~v;
}
struct arm32_dma_range *
bus_dma_get_range(void)
{
return (NULL);
}
int
bus_dma_get_range_nb(void)
{
return (0);
}
static const uint8_t int2gpio[32] __attribute__ ((aligned(32))) = {
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* INT#0 -> INT#5 */
0x00, 0x01, /* GPIO#0 -> GPIO#1 */
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* INT#8 -> INT#13 */
0xff, 0xff, 0xff, 0xff, 0xff, /* INT#14 -> INT#18 */
0x02, 0x03, 0x04, 0x05, 0x06, 0x07, /* GPIO#2 -> GPIO#7 */
0x08, 0x09, 0x0a, 0x0b, 0x0c, /* GPIO#8 -> GPIO#12 */
0xff, 0xff /* INT#30 -> INT#31 */
};
static __inline uint32_t
ixp425_irq2gpio_bit(int irq)
{
return (1U << int2gpio[irq]);
}
#ifdef DDB
#include <ddb/ddb.h>
DB_SHOW_COMMAND(gpio, db_show_gpio)
{
static const char *itype[8] = {
[GPIO_TYPE_ACT_HIGH] = "act-high",
[GPIO_TYPE_ACT_LOW] = "act-low",
[GPIO_TYPE_EDG_RISING] = "edge-rising",
[GPIO_TYPE_EDG_FALLING] = "edge-falling",
[GPIO_TYPE_TRANSITIONAL]= "transitional",
[5] = "type-5", [6] = "type-6", [7] = "type-7"
};
uint32_t gpoutr = GPIO_CONF_READ_4(ixp425_softc, IXP425_GPIO_GPOUTR);
uint32_t gpoer = GPIO_CONF_READ_4(ixp425_softc, IXP425_GPIO_GPOER);
uint32_t gpinr = GPIO_CONF_READ_4(ixp425_softc, IXP425_GPIO_GPINR);
uint32_t gpit1r = GPIO_CONF_READ_4(ixp425_softc, IXP425_GPIO_GPIT1R);
uint32_t gpit2r = GPIO_CONF_READ_4(ixp425_softc, IXP425_GPIO_GPIT2R);
int i, j;
db_printf("GPOUTR %08x GPINR %08x GPOER %08x GPISR %08x\n",
gpoutr, gpinr, gpoer,
GPIO_CONF_READ_4(ixp425_softc, IXP425_GPIO_GPISR));
db_printf("GPIT1R %08x GPIT2R %08x GPCLKR %08x\n",
gpit1r, gpit2r, GPIO_CONF_READ_4(ixp425_softc, IXP425_GPIO_GPCLKR));
for (i = 0; i < 16; i++) {
db_printf("[%2d] out %u in %u %-3s", i,
(gpoutr>>i)&1, (gpinr>>i)&1, (gpoer>>i)&1 ? "in" : "out");
for (j = 0; j < 32; j++)
if (int2gpio[j] == i) {
db_printf(" irq %2u %s", j, itype[
(((i & 8) ? gpit2r : gpit1r) >> (3*(i&7)))
& 7]);
break;
}
db_printf("\n");
}
}
#endif
void
ixp425_set_gpio(struct ixp425_softc *sc, int pin, int type)
{
uint32_t gpiotr = GPIO_CONF_READ_4(sc, GPIO_TYPE_REG(pin));
IXP4XX_GPIO_LOCK();
/* clear interrupt type */
GPIO_CONF_WRITE_4(sc, GPIO_TYPE_REG(pin),
gpiotr &~ GPIO_TYPE(pin, GPIO_TYPE_MASK));
/* clear any pending interrupt */
GPIO_CONF_WRITE_4(sc, IXP425_GPIO_GPISR, (1<<pin));
/* set new interrupt type */
GPIO_CONF_WRITE_4(sc, GPIO_TYPE_REG(pin),
gpiotr | GPIO_TYPE(pin, type));
/* configure gpio line as an input */
GPIO_CONF_WRITE_4(sc, IXP425_GPIO_GPOER,
GPIO_CONF_READ_4(sc, IXP425_GPIO_GPOER) | (1<<pin));
IXP4XX_GPIO_UNLOCK();
}
static __inline void
ixp425_gpio_ack(int irq)
{
if (irq < 32 && ((1 << irq) & IXP425_INT_GPIOMASK))
IXPREG(IXP425_GPIO_VBASE + IXP425_GPIO_GPISR) =
ixp425_irq2gpio_bit(irq);
}
static void
ixp425_post_filter(void *arg)
{
uintptr_t irq = (uintptr_t) arg;
ixp425_gpio_ack(irq);
}
void
arm_mask_irq(uintptr_t nb)
{
int i;
i = disable_interrupts(I32_bit);
if (nb < 32) {
intr_enabled &= ~(1 << nb);
ixp425_set_intrmask();
} else {
intr_enabled2 &= ~(1 << (nb - 32));
ixp435_set_intrmask();
}
restore_interrupts(i);
/*XXX; If it's a GPIO interrupt, ACK it know. Can it be a problem ?*/
ixp425_gpio_ack(nb);
}
void
arm_unmask_irq(uintptr_t nb)
{
int i;
i = disable_interrupts(I32_bit);
if (nb < 32) {
intr_enabled |= (1 << nb);
ixp425_set_intrmask();
} else {
intr_enabled2 |= (1 << (nb - 32));
ixp435_set_intrmask();
}
restore_interrupts(i);
}
static __inline uint32_t
ixp425_irq_read(void)
{
return IXPREG(IXP425_INT_STATUS) & intr_enabled;
}
static __inline uint32_t
ixp435_irq_read(void)
{
return IXPREG(IXP435_INT_STATUS2) & intr_enabled2;
}
int
arm_get_next_irq(int last)
{
uint32_t mask;
last += 1; /* always advance fwd, NB: handles -1 */
if (last < 32) {
mask = ixp425_irq_read() >> last;
for (; mask != 0; mask >>= 1, last++) {
if (mask & 1)
return last;
}
last = 32;
}
if (cpu_is_ixp43x()) {
mask = ixp435_irq_read() >> (32-last);
for (; mask != 0; mask >>= 1, last++) {
if (mask & 1)
return last;
}
}
return -1;
}
void
cpu_reset(void)
{
bus_space_write_4(&ixp425_bs_tag, IXP425_TIMER_VBASE,
IXP425_OST_WDOG_KEY, OST_WDOG_KEY_MAJICK);
bus_space_write_4(&ixp425_bs_tag, IXP425_TIMER_VBASE,
IXP425_OST_WDOG, 0);
bus_space_write_4(&ixp425_bs_tag, IXP425_TIMER_VBASE,
IXP425_OST_WDOG_ENAB, OST_WDOG_ENAB_RST_ENA |
OST_WDOG_ENAB_CNT_ENA);
printf("Reset failed!\n");
for(;;);
}
static void
ixp425_identify(driver_t *driver, device_t parent)
{
BUS_ADD_CHILD(parent, 0, "ixp", 0);
}
static int
ixp425_probe(device_t dev)
{
device_set_desc(dev, "Intel IXP4XX");
return (0);
}
static int
ixp425_attach(device_t dev)
{
struct ixp425_softc *sc;
device_printf(dev, "%b\n", ixp4xx_read_feature_bits(), EXP_FCTRL_BITS);
sc = device_get_softc(dev);
sc->sc_iot = &ixp425_bs_tag;
KASSERT(ixp425_softc == NULL, ("%s called twice?", __func__));
ixp425_softc = sc;
intr_enabled = 0;
ixp425_set_intrmask();
ixp425_set_intrsteer();
if (cpu_is_ixp43x()) {
intr_enabled2 = 0;
ixp435_set_intrmask();
ixp435_set_intrsteer();
}
arm_post_filter = ixp425_post_filter;
mtx_init(&ixp425_gpio_mtx, "gpio", NULL, MTX_DEF);
if (bus_space_map(sc->sc_iot, IXP425_GPIO_HWBASE, IXP425_GPIO_SIZE,
0, &sc->sc_gpio_ioh))
panic("%s: unable to map GPIO registers", __func__);
if (bus_space_map(sc->sc_iot, IXP425_EXP_HWBASE, IXP425_EXP_SIZE,
0, &sc->sc_exp_ioh))
panic("%s: unable to map Expansion Bus registers", __func__);
/* XXX belongs in platform init */
if (cpu_is_ixp43x())
cambria_exp_bus_init(sc);
if (bus_dma_tag_create(NULL, 1, 0, BUS_SPACE_MAXADDR_32BIT,
BUS_SPACE_MAXADDR, NULL, NULL, 0xffffffff, 0xff, 0xffffffff, 0,
NULL, NULL, &sc->sc_dmat))
panic("%s: failed to create dma tag", __func__);
sc->sc_irq_rman.rm_type = RMAN_ARRAY;
sc->sc_irq_rman.rm_descr = "IXP4XX IRQs";
if (rman_init(&sc->sc_irq_rman) != 0 ||
rman_manage_region(&sc->sc_irq_rman, 0, cpu_is_ixp43x() ? 63 : 31) != 0)
panic("%s: failed to set up IRQ rman", __func__);
sc->sc_mem_rman.rm_type = RMAN_ARRAY;
sc->sc_mem_rman.rm_descr = "IXP4XX Memory";
if (rman_init(&sc->sc_mem_rman) != 0 ||
rman_manage_region(&sc->sc_mem_rman, 0, ~0) != 0)
panic("%s: failed to set up memory rman", __func__);
BUS_ADD_CHILD(dev, 0, "pcib", 0);
BUS_ADD_CHILD(dev, 0, "ixpclk", 0);
BUS_ADD_CHILD(dev, 0, "ixpiic", 0);
/* XXX move to hints? */
BUS_ADD_CHILD(dev, 0, "ixpwdog", 0);
/* attach wired devices via hints */
bus_enumerate_hinted_children(dev);
bus_generic_probe(dev);
bus_generic_attach(dev);
return (0);
}
static void
ixp425_hinted_child(device_t bus, const char *dname, int dunit)
{
device_t child;
struct ixp425_ivar *ivar;
child = BUS_ADD_CHILD(bus, 0, dname, dunit);
ivar = IXP425_IVAR(child);
resource_int_value(dname, dunit, "addr", &ivar->addr);
resource_int_value(dname, dunit, "irq", &ivar->irq);
}
static device_t
ixp425_add_child(device_t dev, u_int order, const char *name, int unit)
{
device_t child;
struct ixp425_ivar *ivar;
child = device_add_child_ordered(dev, order, name, unit);
if (child == NULL)
return NULL;
ivar = malloc(sizeof(struct ixp425_ivar), M_DEVBUF, M_NOWAIT);
if (ivar == NULL) {
device_delete_child(dev, child);
return NULL;
}
ivar->addr = 0;
ivar->irq = -1;
device_set_ivars(child, ivar);
return child;
}
static int
ixp425_read_ivar(device_t bus, device_t child, int which, uintptr_t *result)
{
struct ixp425_ivar *ivar = IXP425_IVAR(child);
switch (which) {
case IXP425_IVAR_ADDR:
if (ivar->addr != 0) {
*(uint32_t *)result = ivar->addr;
return 0;
}
break;
case IXP425_IVAR_IRQ:
if (ivar->irq != -1) {
*(int *)result = ivar->irq;
return 0;
}
break;
}
return EINVAL;
}
/*
* NB: This table handles P->V translations for regions setup with
* static mappings in initarm. This is used solely for calls to
* bus_alloc_resource_any; anything done with bus_space_map is
* handled elsewhere and does not require an entry here.
*
* XXX this table is also used by uart_cpu_getdev via getvbase
* (hence the public api)
*/
struct hwvtrans {
uint32_t hwbase;
uint32_t size;
uint32_t vbase;
int isa4x; /* XXX needs special bus space tag */
int isslow; /* XXX needs special bus space tag */
};
static const struct hwvtrans *
gethwvtrans(uint32_t hwbase, uint32_t size)
{
static const struct hwvtrans hwvtrans[] = {
/* NB: needed only for uart_cpu_getdev */
{ .hwbase = IXP425_UART0_HWBASE,
.size = IXP425_REG_SIZE,
.vbase = IXP425_UART0_VBASE,
.isa4x = 1 },
{ .hwbase = IXP425_UART1_HWBASE,
.size = IXP425_REG_SIZE,
.vbase = IXP425_UART1_VBASE,
.isa4x = 1 },
{ .hwbase = IXP425_PCI_HWBASE,
.size = IXP425_PCI_SIZE,
.vbase = IXP425_PCI_VBASE },
{ .hwbase = IXP425_PCI_MEM_HWBASE,
.size = IXP425_PCI_MEM_SIZE,
.vbase = IXP425_PCI_MEM_VBASE },
{ .hwbase = IXP425_EXP_BUS_CS0_HWBASE,
.size = IXP425_EXP_BUS_CS0_SIZE,
.vbase = IXP425_EXP_BUS_CS0_VBASE },
/* NB: needed for ixp435 ehci controllers */
{ .hwbase = IXP435_USB1_HWBASE,
.size = IXP435_USB1_SIZE,
.vbase = IXP435_USB1_VBASE },
{ .hwbase = IXP435_USB2_HWBASE,
.size = IXP435_USB2_SIZE,
.vbase = IXP435_USB2_VBASE },
{ .hwbase = CAMBRIA_GPS_HWBASE,
.size = CAMBRIA_GPS_SIZE,
.vbase = CAMBRIA_GPS_VBASE,
.isslow = 1 },
{ .hwbase = CAMBRIA_RS485_HWBASE,
.size = CAMBRIA_RS485_SIZE,
.vbase = CAMBRIA_RS485_VBASE,
.isslow = 1 },
};
int i;
for (i = 0; i < sizeof hwvtrans / sizeof *hwvtrans; i++) {
if (hwbase >= hwvtrans[i].hwbase &&
hwbase + size <= hwvtrans[i].hwbase + hwvtrans[i].size)
return &hwvtrans[i];
}
return NULL;
}
/* XXX for uart_cpu_getdev */
int
getvbase(uint32_t hwbase, uint32_t size, uint32_t *vbase)
{
const struct hwvtrans *hw;
hw = gethwvtrans(hwbase, size);
if (hw == NULL)
return (ENOENT);
*vbase = hwbase - hw->hwbase + hw->vbase;
return (0);
}
static struct resource *
ixp425_alloc_resource(device_t dev, device_t child, int type, int *rid,
u_long start, u_long end, u_long count, u_int flags)
{
struct ixp425_softc *sc = device_get_softc(dev);
const struct hwvtrans *vtrans;
struct resource *rv;
uint32_t addr;
int needactivate = flags & RF_ACTIVE;
int irq;
flags &= ~RF_ACTIVE;
switch (type) {
case SYS_RES_IRQ:
/* override per hints */
if (BUS_READ_IVAR(dev, child, IXP425_IVAR_IRQ, &irq) == 0)
start = end = irq;
rv = rman_reserve_resource(&sc->sc_irq_rman, start, end, count,
flags, child);
if (rv != NULL)
rman_set_rid(rv, *rid);
break;
case SYS_RES_MEMORY:
/* override per hints */
if (BUS_READ_IVAR(dev, child, IXP425_IVAR_ADDR, &addr) == 0) {
start = addr;
/* XXX use nominal window to check for mapping */
vtrans = gethwvtrans(start, 0x1000);
if (vtrans != NULL) {
/*
* Assign the entire mapped region; this may
* not be correct but without more info from
* the caller we cannot tell.
*/
end = start + vtrans->size -
(start - vtrans->hwbase);
if (bootverbose)
device_printf(child,
"%s: assign 0x%lx:0x%lx%s\n",
__func__, start, end - start,
vtrans->isa4x ? " A4X" :
vtrans->isslow ? " SLOW" : "");
}
} else
vtrans = gethwvtrans(start, end - start);
if (vtrans == NULL) {
/* likely means above table needs to be updated */
device_printf(child, "%s: no mapping for 0x%lx:0x%lx\n",
__func__, start, end - start);
return NULL;
}
rv = rman_reserve_resource(&sc->sc_mem_rman, start, end,
end - start, flags, child);
if (rv == NULL) {
device_printf(child, "%s: cannot reserve 0x%lx:0x%lx\n",
__func__, start, end - start);
return NULL;
}
rman_set_rid(rv, *rid);
break;
default:
rv = NULL;
break;
}
if (rv != NULL && needactivate) {
if (bus_activate_resource(child, type, *rid, rv)) {
rman_release_resource(rv);
return (NULL);
}
}
return (rv);
}
static int
ixp425_release_resource(device_t bus, device_t child, int type, int rid,
struct resource *r)
{
/* NB: no private resources, just release */
return rman_release_resource(r);
}
static int
ixp425_activate_resource(device_t dev, device_t child, int type, int rid,
struct resource *r)
{
struct ixp425_softc *sc = device_get_softc(dev);
const struct hwvtrans *vtrans;
if (type == SYS_RES_MEMORY) {
vtrans = gethwvtrans(rman_get_start(r), rman_get_size(r));
if (vtrans == NULL) { /* NB: should not happen */
device_printf(child, "%s: no mapping for 0x%lx:0x%lx\n",
__func__, rman_get_start(r), rman_get_size(r));
return (ENOENT);
}
if (vtrans->isa4x)
rman_set_bustag(r, &ixp425_a4x_bs_tag);
else if (vtrans->isslow)
rman_set_bustag(r, &cambria_exp_bs_tag);
else
rman_set_bustag(r, sc->sc_iot);
rman_set_bushandle(r, vtrans->vbase);
}
return (rman_activate_resource(r));
}
static int
ixp425_deactivate_resource(device_t bus, device_t child, int type, int rid,
struct resource *r)
{
/* NB: no private resources, just deactive */
return (rman_deactivate_resource(r));
}
static __inline void
get_masks(struct resource *res, uint32_t *mask, uint32_t *mask2)
{
int i;
*mask = 0;
for (i = rman_get_start(res); i < 32 && i <= rman_get_end(res); i++)
*mask |= 1 << i;
*mask2 = 0;
for (; i <= rman_get_end(res); i++)
*mask2 |= 1 << (i - 32);
}
static __inline void
update_masks(uint32_t mask, uint32_t mask2)
{
intr_enabled = mask;
ixp425_set_intrmask();
if (cpu_is_ixp43x()) {
intr_enabled2 = mask2;
ixp435_set_intrmask();
}
}
static int
ixp425_setup_intr(device_t dev, device_t child,
struct resource *res, int flags, driver_filter_t *filt,
driver_intr_t *intr, void *arg, void **cookiep)
{
uint32_t mask, mask2;
BUS_SETUP_INTR(device_get_parent(dev), child, res, flags, filt, intr,
arg, cookiep);
get_masks(res, &mask, &mask2);
update_masks(intr_enabled | mask, intr_enabled2 | mask2);
return (0);
}
static int
ixp425_teardown_intr(device_t dev, device_t child, struct resource *res,
void *cookie)
{
uint32_t mask, mask2;
get_masks(res, &mask, &mask2);
update_masks(intr_enabled &~ mask, intr_enabled2 &~ mask2);
return (BUS_TEARDOWN_INTR(device_get_parent(dev), child, res, cookie));
}
static device_method_t ixp425_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, ixp425_probe),
DEVMETHOD(device_attach, ixp425_attach),
DEVMETHOD(device_identify, ixp425_identify),
/* Bus interface */
DEVMETHOD(bus_add_child, ixp425_add_child),
DEVMETHOD(bus_hinted_child, ixp425_hinted_child),
DEVMETHOD(bus_read_ivar, ixp425_read_ivar),
DEVMETHOD(bus_alloc_resource, ixp425_alloc_resource),
DEVMETHOD(bus_release_resource, ixp425_release_resource),
DEVMETHOD(bus_activate_resource, ixp425_activate_resource),
DEVMETHOD(bus_deactivate_resource, ixp425_deactivate_resource),
DEVMETHOD(bus_setup_intr, ixp425_setup_intr),
DEVMETHOD(bus_teardown_intr, ixp425_teardown_intr),
{0, 0},
};
static driver_t ixp425_driver = {
"ixp",
ixp425_methods,
sizeof(struct ixp425_softc),
};
static devclass_t ixp425_devclass;
DRIVER_MODULE(ixp, nexus, ixp425_driver, ixp425_devclass, 0, 0);