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| Current File : //sys/amd64/compile/hs32/modules/usr/src/sys/modules/arcmsr/@/arm/s3c2xx0/s3c24x0.c |
/* $NetBSD: s3c2410.c,v 1.4 2003/08/27 03:46:05 bsh Exp $ */
/*
* Copyright (c) 2003 Genetec corporation. All rights reserved.
* Written by Hiroyuki Bessho for Genetec corporation.
*
* 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. The name of Genetec corporation may not be used to endorse
* or promote products derived from this software without specific prior
* written permission.
*
* THIS SOFTWARE IS PROVIDED BY GENETEC CORP. ``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 GENETEC CORP.
* 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/s3c2xx0/s3c24x0.c 210458 2010-07-24 23:41:09Z andrew $");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/reboot.h>
#include <sys/malloc.h>
#include <sys/module.h>
#include <sys/bus.h>
#include <vm/vm.h>
#include <vm/pmap.h>
#include <machine/cpu.h>
#include <machine/bus.h>
#include <machine/cpufunc.h>
#include <machine/intr.h>
#include <arm/s3c2xx0/s3c2410reg.h>
#include <arm/s3c2xx0/s3c2440reg.h>
#include <arm/s3c2xx0/s3c24x0var.h>
#include <sys/rman.h>
#define S3C2XX0_XTAL_CLK 12000000
#define IPL_LEVELS 13
u_int irqmasks[IPL_LEVELS];
static struct {
uint32_t idcode;
const char *name;
s3c2xx0_cpu cpu;
} s3c2x0_cpu_id[] = {
{ CHIPID_S3C2410A, "S3C2410A", CPU_S3C2410 },
{ CHIPID_S3C2440A, "S3C2440A", CPU_S3C2440 },
{ CHIPID_S3C2442B, "S3C2442B", CPU_S3C2440 },
{ 0, NULL }
};
static struct {
const char *name;
int prio;
int unit;
struct {
int type;
u_long start;
u_long count;
} res[2];
} s3c24x0_children[] = {
{ "rtc", 0, -1, {
{ SYS_RES_IOPORT, S3C24X0_RTC_PA_BASE, S3C24X0_RTC_SIZE },
{ 0 },
} },
{ "timer", 0, -1, { { 0 }, } },
{ "uart", 1, 0, {
{ SYS_RES_IRQ, S3C24X0_INT_UART0, 1 },
{ SYS_RES_IOPORT, S3C24X0_UART_PA_BASE(0),
S3C24X0_UART_BASE(1) - S3C24X0_UART_BASE(0) },
} },
{ "uart", 1, 1, {
{ SYS_RES_IRQ, S3C24X0_INT_UART1, 1 },
{ SYS_RES_IOPORT, S3C24X0_UART_PA_BASE(1),
S3C24X0_UART_BASE(2) - S3C24X0_UART_BASE(1) },
} },
{ "uart", 1, 2, {
{ SYS_RES_IRQ, S3C24X0_INT_UART2, 1 },
{ SYS_RES_IOPORT, S3C24X0_UART_PA_BASE(2),
S3C24X0_UART_BASE(3) - S3C24X0_UART_BASE(2) },
} },
{ "ohci", 0, -1, {
{ SYS_RES_IRQ, S3C24X0_INT_USBH, 0 },
{ SYS_RES_IOPORT, S3C24X0_USBHC_PA_BASE, S3C24X0_USBHC_SIZE },
} },
{ NULL },
};
/* prototypes */
static device_t s3c24x0_add_child(device_t, int, const char *, int);
static int s3c24x0_probe(device_t);
static int s3c24x0_attach(device_t);
static void s3c24x0_identify(driver_t *, device_t);
static int s3c24x0_setup_intr(device_t, device_t, struct resource *, int,
driver_filter_t *, driver_intr_t *, void *, void **);
static int s3c24x0_teardown_intr(device_t, device_t, struct resource *,
void *);
static int s3c24x0_config_intr(device_t, int, enum intr_trigger,
enum intr_polarity);
static struct resource *s3c24x0_alloc_resource(device_t, device_t, int, int *,
u_long, u_long, u_long, u_int);
static int s3c24x0_activate_resource(device_t, device_t, int, int,
struct resource *);
static int s3c24x0_release_resource(device_t, device_t, int, int,
struct resource *);
static struct resource_list *s3c24x0_get_resource_list(device_t, device_t);
static void s3c24x0_identify_cpu(device_t);
static device_method_t s3c24x0_methods[] = {
DEVMETHOD(device_probe, s3c24x0_probe),
DEVMETHOD(device_attach, s3c24x0_attach),
DEVMETHOD(device_identify, s3c24x0_identify),
DEVMETHOD(bus_setup_intr, s3c24x0_setup_intr),
DEVMETHOD(bus_teardown_intr, s3c24x0_teardown_intr),
DEVMETHOD(bus_config_intr, s3c24x0_config_intr),
DEVMETHOD(bus_alloc_resource, s3c24x0_alloc_resource),
DEVMETHOD(bus_activate_resource, s3c24x0_activate_resource),
DEVMETHOD(bus_release_resource, s3c24x0_release_resource),
DEVMETHOD(bus_get_resource_list,s3c24x0_get_resource_list),
DEVMETHOD(bus_set_resource, bus_generic_rl_set_resource),
DEVMETHOD(bus_get_resource, bus_generic_rl_get_resource),
{0, 0},
};
static driver_t s3c24x0_driver = {
"s3c24x0",
s3c24x0_methods,
sizeof(struct s3c24x0_softc),
};
static devclass_t s3c24x0_devclass;
DRIVER_MODULE(s3c24x0, nexus, s3c24x0_driver, s3c24x0_devclass, 0, 0);
struct s3c2xx0_softc *s3c2xx0_softc = NULL;
static device_t
s3c24x0_add_child(device_t bus, int prio, const char *name, int unit)
{
device_t child;
struct s3c2xx0_ivar *ivar;
child = device_add_child_ordered(bus, prio, name, unit);
if (child == NULL)
return (NULL);
ivar = malloc(sizeof(*ivar), M_DEVBUF, M_NOWAIT | M_ZERO);
if (ivar == NULL) {
device_delete_child(bus, child);
printf("Can't add alloc ivar\n");
return (NULL);
}
device_set_ivars(child, ivar);
resource_list_init(&ivar->resources);
return (child);
}
static void
s3c24x0_enable_ext_intr(unsigned int irq)
{
uint32_t reg, value;
int offset;
if (irq <= 7) {
reg = GPIO_PFCON;
offset = irq * 2;
} else if (irq <= 23) {
reg = GPIO_PGCON;
offset = (irq - 8) * 2;
} else
return;
/* Make the pin an interrupt source */
value = bus_space_read_4(s3c2xx0_softc->sc_iot,
s3c2xx0_softc->sc_gpio_ioh, reg);
value &= ~(3 << offset);
value |= 2 << offset;
bus_space_write_4(s3c2xx0_softc->sc_iot, s3c2xx0_softc->sc_gpio_ioh,
reg, value);
}
static int
s3c24x0_setup_intr(device_t dev, device_t child,
struct resource *ires, int flags, driver_filter_t *filt,
driver_intr_t *intr, void *arg, void **cookiep)
{
int error, irq;
error = BUS_SETUP_INTR(device_get_parent(dev), child, ires, flags, filt,
intr, arg, cookiep);
if (error != 0)
return (error);
for (irq = rman_get_start(ires); irq <= rman_get_end(ires); irq++) {
if (irq >= S3C24X0_EXTIRQ_MIN && irq <= S3C24X0_EXTIRQ_MAX) {
/* Enable the external interrupt pin */
s3c24x0_enable_ext_intr(irq - S3C24X0_EXTIRQ_MIN);
}
arm_unmask_irq(irq);
}
return (0);
}
static int
s3c24x0_teardown_intr(device_t dev, device_t child, struct resource *res,
void *cookie)
{
return (BUS_TEARDOWN_INTR(device_get_parent(dev), child, res, cookie));
}
static int
s3c24x0_config_intr(device_t dev, int irq, enum intr_trigger trig,
enum intr_polarity pol)
{
uint32_t mask, reg, value;
int offset;
/* Only external interrupts can be configured */
if (irq < S3C24X0_EXTIRQ_MIN || irq > S3C24X0_EXTIRQ_MAX)
return (EINVAL);
/* There is no standard trigger or polarity for the bus */
if (trig == INTR_TRIGGER_CONFORM || pol == INTR_POLARITY_CONFORM)
return (EINVAL);
irq -= S3C24X0_EXTIRQ_MIN;
/* Get the bits to set */
mask = 0;
if (pol == INTR_POLARITY_LOW) {
mask = 2;
} else if (pol == INTR_POLARITY_HIGH) {
mask = 4;
}
if (trig == INTR_TRIGGER_LEVEL) {
mask >>= 2;
}
/* Get the register to set */
if (irq <= 7) {
reg = GPIO_EXTINT(0);
offset = irq * 4;
} else if (irq <= 15) {
reg = GPIO_EXTINT(1);
offset = (irq - 8) * 4;
} else if (irq <= 23) {
reg = GPIO_EXTINT(2);
offset = (irq - 16) * 4;
} else {
return (EINVAL);
}
/* Set the new signaling method */
value = bus_space_read_4(s3c2xx0_softc->sc_iot,
s3c2xx0_softc->sc_gpio_ioh, reg);
value &= ~(7 << offset);
value |= mask << offset;
bus_space_write_4(s3c2xx0_softc->sc_iot,
s3c2xx0_softc->sc_gpio_ioh, reg, value);
return (0);
}
static struct resource *
s3c24x0_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 resource_list_entry *rle;
struct s3c2xx0_ivar *ivar = device_get_ivars(child);
struct resource_list *rl = &ivar->resources;
struct resource *res = NULL;
if (device_get_parent(child) != bus)
return (BUS_ALLOC_RESOURCE(device_get_parent(bus), child,
type, rid, start, end, count, flags));
rle = resource_list_find(rl, type, *rid);
if (rle != NULL) {
/* There is a resource list. Use it */
if (rle->res)
panic("Resource rid %d type %d already in use", *rid,
type);
if (start == 0UL && end == ~0UL) {
start = rle->start;
count = ulmax(count, rle->count);
end = ulmax(rle->end, start + count - 1);
}
/*
* When allocating an irq with children irq's really
* allocate the children as it is those we are interested
* in receiving, not the parent.
*/
if (type == SYS_RES_IRQ && start == end) {
switch (start) {
case S3C24X0_INT_ADCTC:
start = S3C24X0_INT_TC;
end = S3C24X0_INT_ADC;
break;
#ifdef S3C2440_INT_CAM
case S3C2440_INT_CAM:
start = S3C2440_INT_CAM_C;
end = S3C2440_INT_CAM_P;
break;
#endif
default:
break;
}
count = end - start + 1;
}
}
switch (type) {
case SYS_RES_IRQ:
res = rman_reserve_resource(
&s3c2xx0_softc->s3c2xx0_irq_rman, start, end,
count, flags, child);
break;
case SYS_RES_IOPORT:
case SYS_RES_MEMORY:
res = rman_reserve_resource(
&s3c2xx0_softc->s3c2xx0_mem_rman,
start, end, count, flags, child);
if (res == NULL)
panic("Unable to map address space %#lX-%#lX", start,
end);
rman_set_bustag(res, &s3c2xx0_bs_tag);
rman_set_bushandle(res, start);
if (flags & RF_ACTIVE) {
if (bus_activate_resource(child, type, *rid, res)) {
rman_release_resource(res);
return (NULL);
}
}
break;
}
if (res != NULL) {
rman_set_rid(res, *rid);
if (rle != NULL) {
rle->res = res;
rle->start = rman_get_start(res);
rle->end = rman_get_end(res);
rle->count = count;
}
}
return (res);
}
static int
s3c24x0_activate_resource(device_t bus, device_t child, int type, int rid,
struct resource *r)
{
bus_space_handle_t p;
int error;
if (type == SYS_RES_MEMORY || type == SYS_RES_IOPORT) {
error = bus_space_map(rman_get_bustag(r),
rman_get_bushandle(r), rman_get_size(r), 0, &p);
if (error)
return (error);
rman_set_bushandle(r, p);
}
return (rman_activate_resource(r));
}
static int
s3c24x0_release_resource(device_t bus, device_t child, int type, int rid,
struct resource *r)
{
struct s3c2xx0_ivar *ivar = device_get_ivars(child);
struct resource_list *rl = &ivar->resources;
struct resource_list_entry *rle;
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 struct resource_list *
s3c24x0_get_resource_list(device_t dev, device_t child)
{
struct s3c2xx0_ivar *ivar;
ivar = device_get_ivars(child);
return (&(ivar->resources));
}
void
s3c24x0_identify(driver_t *driver, device_t parent)
{
BUS_ADD_CHILD(parent, 0, "s3c24x0", 0);
}
int
s3c24x0_probe(device_t dev)
{
return 0;
}
int
s3c24x0_attach(device_t dev)
{
struct s3c24x0_softc *sc = device_get_softc(dev);
bus_space_tag_t iot;
device_t child;
unsigned int i, j;
u_long irqmax;
s3c2xx0_softc = &(sc->sc_sx);
sc->sc_sx.sc_iot = iot = &s3c2xx0_bs_tag;
s3c2xx0_softc->s3c2xx0_irq_rman.rm_type = RMAN_ARRAY;
s3c2xx0_softc->s3c2xx0_irq_rman.rm_descr = "S3C24X0 IRQs";
s3c2xx0_softc->s3c2xx0_mem_rman.rm_type = RMAN_ARRAY;
s3c2xx0_softc->s3c2xx0_mem_rman.rm_descr = "S3C24X0 Device Registers";
/* Manage the registor memory space */
if ((rman_init(&s3c2xx0_softc->s3c2xx0_mem_rman) != 0) ||
(rman_manage_region(&s3c2xx0_softc->s3c2xx0_mem_rman,
S3C24X0_DEV_VA_OFFSET,
S3C24X0_DEV_VA_OFFSET + S3C24X0_DEV_VA_SIZE) != 0) ||
(rman_manage_region(&s3c2xx0_softc->s3c2xx0_mem_rman,
S3C24X0_DEV_START, S3C24X0_DEV_STOP) != 0))
panic("s3c24x0_attach: failed to set up register rman");
/* These are needed for things without a proper device to attach to */
sc->sc_sx.sc_intctl_ioh = S3C24X0_INTCTL_BASE;
sc->sc_sx.sc_gpio_ioh = S3C24X0_GPIO_BASE;
sc->sc_sx.sc_clkman_ioh = S3C24X0_CLKMAN_BASE;
sc->sc_sx.sc_wdt_ioh = S3C24X0_WDT_BASE;
sc->sc_timer_ioh = S3C24X0_TIMER_BASE;
/*
* Identify the CPU
*/
s3c24x0_identify_cpu(dev);
/*
* Manage the interrupt space.
* We need to put this after s3c24x0_identify_cpu as the avaliable
* interrupts change depending on which CPU we have.
*/
if (sc->sc_sx.sc_cpu == CPU_S3C2410)
irqmax = S3C2410_SUBIRQ_MAX;
else
irqmax = S3C2440_SUBIRQ_MAX;
if (rman_init(&s3c2xx0_softc->s3c2xx0_irq_rman) != 0 ||
rman_manage_region(&s3c2xx0_softc->s3c2xx0_irq_rman, 0,
irqmax) != 0 ||
rman_manage_region(&s3c2xx0_softc->s3c2xx0_irq_rman,
S3C24X0_EXTIRQ_MIN, S3C24X0_EXTIRQ_MAX))
panic("s3c24x0_attach: failed to set up IRQ rman");
/* calculate current clock frequency */
s3c24x0_clock_freq(&sc->sc_sx);
device_printf(dev, "fclk %d MHz hclk %d MHz pclk %d MHz\n",
sc->sc_sx.sc_fclk / 1000000, sc->sc_sx.sc_hclk / 1000000,
sc->sc_sx.sc_pclk / 1000000);
/*
* Attach children devices
*/
for (i = 0; s3c24x0_children[i].name != NULL; i++) {
child = s3c24x0_add_child(dev, s3c24x0_children[i].prio,
s3c24x0_children[i].name, s3c24x0_children[i].unit);
for (j = 0; j < sizeof(s3c24x0_children[i].res) /
sizeof(s3c24x0_children[i].res[0]) &&
s3c24x0_children[i].res[j].type != 0; j++) {
bus_set_resource(child,
s3c24x0_children[i].res[j].type, 0,
s3c24x0_children[i].res[j].start,
s3c24x0_children[i].res[j].count);
}
}
bus_generic_probe(dev);
bus_generic_attach(dev);
return (0);
}
static void
s3c24x0_identify_cpu(device_t dev)
{
struct s3c24x0_softc *sc = device_get_softc(dev);
uint32_t idcode;
int i;
idcode = bus_space_read_4(sc->sc_sx.sc_iot, sc->sc_sx.sc_gpio_ioh,
GPIO_GSTATUS1);
for (i = 0; s3c2x0_cpu_id[i].name != NULL; i++) {
if (s3c2x0_cpu_id[i].idcode == idcode)
break;
}
if (s3c2x0_cpu_id[i].name == NULL)
panic("Unknown CPU detected ((Chip ID: %#X)", idcode);
device_printf(dev, "Found %s CPU (Chip ID: %#X)\n",
s3c2x0_cpu_id[i].name, idcode);
sc->sc_sx.sc_cpu = s3c2x0_cpu_id[i].cpu;
}
/*
* fill sc_pclk, sc_hclk, sc_fclk from values of clock controller register.
*
* s3c24{1,4}0_clock_freq2() is meant to be called from kernel startup routines.
* s3c24x0_clock_freq() is for after kernel initialization is done.
*
* Because they can be called before bus_space is available we need to use
* volatile pointers rather than bus_space_read.
*/
void
s3c2410_clock_freq2(vm_offset_t clkman_base, int *fclk, int *hclk, int *pclk)
{
uint32_t pllcon, divn;
unsigned int mdiv, pdiv, sdiv;
unsigned int f, h, p;
pllcon = *(volatile uint32_t *)(clkman_base + CLKMAN_MPLLCON);
divn = *(volatile uint32_t *)(clkman_base + CLKMAN_CLKDIVN);
mdiv = (pllcon & PLLCON_MDIV_MASK) >> PLLCON_MDIV_SHIFT;
pdiv = (pllcon & PLLCON_PDIV_MASK) >> PLLCON_PDIV_SHIFT;
sdiv = (pllcon & PLLCON_SDIV_MASK) >> PLLCON_SDIV_SHIFT;
f = ((mdiv + 8) * S3C2XX0_XTAL_CLK) / ((pdiv + 2) * (1 << sdiv));
h = f;
if (divn & S3C2410_CLKDIVN_HDIVN)
h /= 2;
p = h;
if (divn & CLKDIVN_PDIVN)
p /= 2;
if (fclk) *fclk = f;
if (hclk) *hclk = h;
if (pclk) *pclk = p;
}
void
s3c2440_clock_freq2(vm_offset_t clkman_base, int *fclk, int *hclk, int *pclk)
{
uint32_t pllcon, divn, camdivn;
unsigned int mdiv, pdiv, sdiv;
unsigned int f, h, p;
pllcon = *(volatile uint32_t *)(clkman_base + CLKMAN_MPLLCON);
divn = *(volatile uint32_t *)(clkman_base + CLKMAN_CLKDIVN);
camdivn = *(volatile uint32_t *)(clkman_base + S3C2440_CLKMAN_CAMDIVN);
mdiv = (pllcon & PLLCON_MDIV_MASK) >> PLLCON_MDIV_SHIFT;
pdiv = (pllcon & PLLCON_PDIV_MASK) >> PLLCON_PDIV_SHIFT;
sdiv = (pllcon & PLLCON_SDIV_MASK) >> PLLCON_SDIV_SHIFT;
f = (2 * (mdiv + 8) * S3C2XX0_XTAL_CLK) / ((pdiv + 2) * (1 << sdiv));
h = f;
switch((divn >> 1) & 3) {
case 0:
break;
case 1:
h /= 2;
break;
case 2:
if ((camdivn & S3C2440_CAMDIVN_HCLK4_HALF) ==
S3C2440_CAMDIVN_HCLK4_HALF)
h /= 8;
else
h /= 4;
break;
case 3:
if ((camdivn & S3C2440_CAMDIVN_HCLK3_HALF) ==
S3C2440_CAMDIVN_HCLK3_HALF)
h /= 6;
else
h /= 3;
break;
}
p = h;
if (divn & CLKDIVN_PDIVN)
p /= 2;
if (fclk) *fclk = f;
if (hclk) *hclk = h;
if (pclk) *pclk = p;
}
void
s3c24x0_clock_freq(struct s3c2xx0_softc *sc)
{
vm_offset_t va;
va = sc->sc_clkman_ioh;
switch(sc->sc_cpu) {
case CPU_S3C2410:
s3c2410_clock_freq2(va, &sc->sc_fclk, &sc->sc_hclk,
&sc->sc_pclk);
break;
case CPU_S3C2440:
s3c2440_clock_freq2(va, &sc->sc_fclk, &sc->sc_hclk,
&sc->sc_pclk);
break;
}
}
void
cpu_reset(void)
{
(void) disable_interrupts(I32_bit|F32_bit);
bus_space_write_4(&s3c2xx0_bs_tag, s3c2xx0_softc->sc_wdt_ioh, WDT_WTCON,
WTCON_ENABLE | WTCON_CLKSEL_16 | WTCON_ENRST);
for(;;);
}
void
s3c24x0_sleep(int mode __unused)
{
int reg;
reg = bus_space_read_4(&s3c2xx0_bs_tag, s3c2xx0_softc->sc_clkman_ioh,
CLKMAN_CLKCON);
bus_space_write_4(&s3c2xx0_bs_tag, s3c2xx0_softc->sc_clkman_ioh,
CLKMAN_CLKCON, reg | CLKCON_IDLE);
}
int
arm_get_next_irq(int last __unused)
{
uint32_t intpnd;
int irq, subirq;
if ((irq = bus_space_read_4(&s3c2xx0_bs_tag,
s3c2xx0_softc->sc_intctl_ioh, INTCTL_INTOFFSET)) != 0) {
/* Clear the pending bit */
intpnd = bus_space_read_4(&s3c2xx0_bs_tag,
s3c2xx0_softc->sc_intctl_ioh, INTCTL_INTPND);
bus_space_write_4(&s3c2xx0_bs_tag, s3c2xx0_softc->sc_intctl_ioh,
INTCTL_SRCPND, intpnd);
bus_space_write_4(&s3c2xx0_bs_tag, s3c2xx0_softc->sc_intctl_ioh,
INTCTL_INTPND, intpnd);
switch (irq) {
case S3C24X0_INT_ADCTC:
case S3C24X0_INT_UART0:
case S3C24X0_INT_UART1:
case S3C24X0_INT_UART2:
/* Find the sub IRQ */
subirq = 0x7ff;
subirq &= bus_space_read_4(&s3c2xx0_bs_tag,
s3c2xx0_softc->sc_intctl_ioh, INTCTL_SUBSRCPND);
subirq &= ~(bus_space_read_4(&s3c2xx0_bs_tag,
s3c2xx0_softc->sc_intctl_ioh, INTCTL_INTSUBMSK));
if (subirq == 0)
return (irq);
subirq = ffs(subirq) - 1;
/* Clear the sub irq pending bit */
bus_space_write_4(&s3c2xx0_bs_tag,
s3c2xx0_softc->sc_intctl_ioh, INTCTL_SUBSRCPND,
(1 << subirq));
/*
* Return the parent IRQ for UART
* as it is all we ever need
*/
if (subirq <= 8)
return (irq);
return (S3C24X0_SUBIRQ_MIN + subirq);
case S3C24X0_INT_0:
case S3C24X0_INT_1:
case S3C24X0_INT_2:
case S3C24X0_INT_3:
/* There is a 1:1 mapping to the IRQ we are handling */
return S3C24X0_INT_EXT(irq);
case S3C24X0_INT_4_7:
case S3C24X0_INT_8_23:
/* Find the external interrupt being called */
subirq = 0x7fffff;
subirq &= bus_space_read_4(&s3c2xx0_bs_tag,
s3c2xx0_softc->sc_gpio_ioh, GPIO_EINTPEND);
subirq &= ~bus_space_read_4(&s3c2xx0_bs_tag,
s3c2xx0_softc->sc_gpio_ioh, GPIO_EINTMASK);
if (subirq == 0)
return (irq);
subirq = ffs(subirq) - 1;
/* Clear the external irq pending bit */
bus_space_write_4(&s3c2xx0_bs_tag,
s3c2xx0_softc->sc_gpio_ioh, GPIO_EINTPEND,
(1 << subirq));
return S3C24X0_INT_EXT(subirq);
}
return (irq);
}
return (-1);
}
void
arm_mask_irq(uintptr_t irq)
{
u_int32_t mask;
if (irq >= S3C24X0_INT_EXT(0) && irq <= S3C24X0_INT_EXT(3)) {
/* External interrupt 0..3 are directly mapped to irq 0..3 */
irq -= S3C24X0_EXTIRQ_MIN;
}
if (irq < S3C24X0_SUBIRQ_MIN) {
mask = bus_space_read_4(&s3c2xx0_bs_tag,
s3c2xx0_softc->sc_intctl_ioh, INTCTL_INTMSK);
mask |= (1 << irq);
bus_space_write_4(&s3c2xx0_bs_tag,
s3c2xx0_softc->sc_intctl_ioh, INTCTL_INTMSK, mask);
} else if (irq < S3C24X0_EXTIRQ_MIN) {
mask = bus_space_read_4(&s3c2xx0_bs_tag,
s3c2xx0_softc->sc_intctl_ioh, INTCTL_INTSUBMSK);
mask |= (1 << (irq - S3C24X0_SUBIRQ_MIN));
bus_space_write_4(&s3c2xx0_bs_tag,
s3c2xx0_softc->sc_intctl_ioh, INTCTL_INTSUBMSK, mask);
} else {
mask = bus_space_read_4(&s3c2xx0_bs_tag,
s3c2xx0_softc->sc_gpio_ioh, GPIO_EINTMASK);
mask |= (1 << (irq - S3C24X0_EXTIRQ_MIN));
bus_space_write_4(&s3c2xx0_bs_tag,
s3c2xx0_softc->sc_intctl_ioh, GPIO_EINTMASK, mask);
}
}
void
arm_unmask_irq(uintptr_t irq)
{
u_int32_t mask;
if (irq >= S3C24X0_INT_EXT(0) && irq <= S3C24X0_INT_EXT(3)) {
/* External interrupt 0..3 are directly mapped to irq 0..3 */
irq -= S3C24X0_EXTIRQ_MIN;
}
if (irq < S3C24X0_SUBIRQ_MIN) {
mask = bus_space_read_4(&s3c2xx0_bs_tag,
s3c2xx0_softc->sc_intctl_ioh, INTCTL_INTMSK);
mask &= ~(1 << irq);
bus_space_write_4(&s3c2xx0_bs_tag,
s3c2xx0_softc->sc_intctl_ioh, INTCTL_INTMSK, mask);
} else if (irq < S3C24X0_EXTIRQ_MIN) {
mask = bus_space_read_4(&s3c2xx0_bs_tag,
s3c2xx0_softc->sc_intctl_ioh, INTCTL_INTSUBMSK);
mask &= ~(1 << (irq - S3C24X0_SUBIRQ_MIN));
bus_space_write_4(&s3c2xx0_bs_tag,
s3c2xx0_softc->sc_intctl_ioh, INTCTL_INTSUBMSK, mask);
} else {
mask = bus_space_read_4(&s3c2xx0_bs_tag,
s3c2xx0_softc->sc_gpio_ioh, GPIO_EINTMASK);
mask &= ~(1 << (irq - S3C24X0_EXTIRQ_MIN));
bus_space_write_4(&s3c2xx0_bs_tag,
s3c2xx0_softc->sc_intctl_ioh, GPIO_EINTMASK, mask);
}
}