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-rw-r--r--Documentation/devicetree/bindings/interrupt-controller/samsung,s3c24xx-irq.txt53
-rw-r--r--arch/arm/Kconfig1
-rw-r--r--arch/arm/mach-s3c24xx/Makefile2
-rw-r--r--arch/arm/mach-s3c24xx/common.h1
-rw-r--r--arch/arm/mach-s3c24xx/include/mach/entry-macro.S70
-rw-r--r--arch/arm/mach-s3c24xx/mach-amlm5900.c2
-rw-r--r--arch/arm/mach-s3c24xx/mach-bast.c2
-rw-r--r--arch/arm/mach-s3c24xx/mach-h1940.c7
-rw-r--r--arch/arm/mach-s3c24xx/mach-n30.c4
-rw-r--r--arch/arm/mach-s3c24xx/mach-otom.c2
-rw-r--r--arch/arm/mach-s3c24xx/mach-qt2410.c2
-rw-r--r--arch/arm/mach-s3c24xx/mach-smdk2410.c2
-rw-r--r--arch/arm/mach-s3c24xx/mach-tct_hammer.c2
-rw-r--r--arch/arm/mach-s3c24xx/mach-vr1000.c2
-rw-r--r--arch/arm/plat-samsung/include/plat/cpu.h1
-rw-r--r--drivers/irqchip/Makefile1
-rw-r--r--drivers/irqchip/irq-s3c24xx.c (renamed from arch/arm/mach-s3c24xx/irq.c)523
17 files changed, 472 insertions, 205 deletions
diff --git a/Documentation/devicetree/bindings/interrupt-controller/samsung,s3c24xx-irq.txt b/Documentation/devicetree/bindings/interrupt-controller/samsung,s3c24xx-irq.txt
new file mode 100644
index 000000000000..c54c5a9a2a90
--- /dev/null
+++ b/Documentation/devicetree/bindings/interrupt-controller/samsung,s3c24xx-irq.txt
@@ -0,0 +1,53 @@
+Samsung S3C24XX Interrupt Controllers
+
+The S3C24XX SoCs contain a custom set of interrupt controllers providing a
+varying number of interrupt sources. The set consists of a main- and sub-
+controller and on newer SoCs even a second main controller.
+
+Required properties:
+- compatible: Compatible property value should be "samsung,s3c2410-irq"
+ for machines before s3c2416 and "samsung,s3c2416-irq" for s3c2416 and later.
+
+- reg: Physical base address of the controller and length of memory mapped
+ region.
+
+- interrupt-controller : Identifies the node as an interrupt controller
+
+- #interrupt-cells : Specifies the number of cells needed to encode an
+ interrupt source. The value shall be 4 and interrupt descriptor shall
+ have the following format:
+ <ctrl_num parent_irq ctrl_irq type>
+
+ ctrl_num contains the controller to use:
+ - 0 ... main controller
+ - 1 ... sub controller
+ - 2 ... second main controller on s3c2416 and s3c2450
+ parent_irq contains the parent bit in the main controller and will be
+ ignored in main controllers
+ ctrl_irq contains the interrupt bit of the controller
+ type contains the trigger type to use
+
+Example:
+
+ interrupt-controller@4a000000 {
+ compatible = "samsung,s3c2410-irq";
+ reg = <0x4a000000 0x100>;
+ interrupt-controller;
+ #interrupt-cells=<4>;
+ };
+
+ [...]
+
+ serial@50000000 {
+ compatible = "samsung,s3c2410-uart";
+ reg = <0x50000000 0x4000>;
+ interrupt-parent = <&subintc>;
+ interrupts = <1 28 0 4>, <1 28 1 4>;
+ };
+
+ rtc@57000000 {
+ compatible = "samsung,s3c2410-rtc";
+ reg = <0x57000000 0x100>;
+ interrupt-parent = <&intc>;
+ interrupts = <0 30 0 3>, <0 8 0 3>;
+ };
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index ada582b15cf2..6adf79869f8c 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -778,6 +778,7 @@ config ARCH_S3C24XX
select HAVE_S3C2410_I2C if I2C
select HAVE_S3C2410_WATCHDOG if WATCHDOG
select HAVE_S3C_RTC if RTC_CLASS
+ select MULTI_IRQ_HANDLER
select NEED_MACH_GPIO_H
select NEED_MACH_IO_H
help
diff --git a/arch/arm/mach-s3c24xx/Makefile b/arch/arm/mach-s3c24xx/Makefile
index be6e4d0e6f1a..6f46ecfc8396 100644
--- a/arch/arm/mach-s3c24xx/Makefile
+++ b/arch/arm/mach-s3c24xx/Makefile
@@ -14,7 +14,7 @@ obj- :=
# core
-obj-y += common.o irq.o
+obj-y += common.o
obj-$(CONFIG_CPU_S3C2410) += s3c2410.o
obj-$(CONFIG_S3C2410_CPUFREQ) += cpufreq-s3c2410.o
diff --git a/arch/arm/mach-s3c24xx/common.h b/arch/arm/mach-s3c24xx/common.h
index abefeb38bba4..307c3714be55 100644
--- a/arch/arm/mach-s3c24xx/common.h
+++ b/arch/arm/mach-s3c24xx/common.h
@@ -21,6 +21,7 @@ extern void s3c2410_map_io(void);
extern void s3c2410_init_uarts(struct s3c2410_uartcfg *cfg, int no);
extern void s3c2410_init_clocks(int xtal);
extern void s3c2410_restart(char mode, const char *cmd);
+extern void s3c2410_init_irq(void);
#else
#define s3c2410_init_clocks NULL
#define s3c2410_init_uarts NULL
diff --git a/arch/arm/mach-s3c24xx/include/mach/entry-macro.S b/arch/arm/mach-s3c24xx/include/mach/entry-macro.S
deleted file mode 100644
index 6a21beeba1da..000000000000
--- a/arch/arm/mach-s3c24xx/include/mach/entry-macro.S
+++ /dev/null
@@ -1,70 +0,0 @@
-/*
- * arch/arm/mach-s3c2410/include/mach/entry-macro.S
- *
- * Low-level IRQ helper macros for S3C2410-based platforms
- *
- * This file is licensed under the terms of the GNU General Public
- * License version 2. This program is licensed "as is" without any
- * warranty of any kind, whether express or implied.
-*/
-
-/* We have a problem that the INTOFFSET register does not always
- * show one interrupt. Occasionally we get two interrupts through
- * the prioritiser, and this causes the INTOFFSET register to show
- * what looks like the logical-or of the two interrupt numbers.
- *
- * Thanks to Klaus, Shannon, et al for helping to debug this problem
-*/
-
-#define INTPND (0x10)
-#define INTOFFSET (0x14)
-
-#include <mach/hardware.h>
-#include <asm/irq.h>
-
- .macro get_irqnr_preamble, base, tmp
- .endm
-
- .macro get_irqnr_and_base, irqnr, irqstat, base, tmp
-
- mov \base, #S3C24XX_VA_IRQ
-
- @@ try the interrupt offset register, since it is there
-
- ldr \irqstat, [\base, #INTPND ]
- teq \irqstat, #0
- beq 1002f
- ldr \irqnr, [\base, #INTOFFSET ]
- mov \tmp, #1
- tst \irqstat, \tmp, lsl \irqnr
- bne 1001f
-
- @@ the number specified is not a valid irq, so try
- @@ and work it out for ourselves
-
- mov \irqnr, #0 @@ start here
-
- @@ work out which irq (if any) we got
-
- movs \tmp, \irqstat, lsl#16
- addeq \irqnr, \irqnr, #16
- moveq \irqstat, \irqstat, lsr#16
- tst \irqstat, #0xff
- addeq \irqnr, \irqnr, #8
- moveq \irqstat, \irqstat, lsr#8
- tst \irqstat, #0xf
- addeq \irqnr, \irqnr, #4
- moveq \irqstat, \irqstat, lsr#4
- tst \irqstat, #0x3
- addeq \irqnr, \irqnr, #2
- moveq \irqstat, \irqstat, lsr#2
- tst \irqstat, #0x1
- addeq \irqnr, \irqnr, #1
-
- @@ we have the value
-1001:
- adds \irqnr, \irqnr, #IRQ_EINT0
-1002:
- @@ exit here, Z flag unset if IRQ
-
- .endm
diff --git a/arch/arm/mach-s3c24xx/mach-amlm5900.c b/arch/arm/mach-s3c24xx/mach-amlm5900.c
index 432144cb54ae..e27b5c91b3db 100644
--- a/arch/arm/mach-s3c24xx/mach-amlm5900.c
+++ b/arch/arm/mach-s3c24xx/mach-amlm5900.c
@@ -238,7 +238,7 @@ static void __init amlm5900_init(void)
MACHINE_START(AML_M5900, "AML_M5900")
.atag_offset = 0x100,
.map_io = amlm5900_map_io,
- .init_irq = s3c24xx_init_irq,
+ .init_irq = s3c2410_init_irq,
.init_machine = amlm5900_init,
.init_time = samsung_timer_init,
.restart = s3c2410_restart,
diff --git a/arch/arm/mach-s3c24xx/mach-bast.c b/arch/arm/mach-s3c24xx/mach-bast.c
index eabe2db42ef6..22d6ae926d91 100644
--- a/arch/arm/mach-s3c24xx/mach-bast.c
+++ b/arch/arm/mach-s3c24xx/mach-bast.c
@@ -605,7 +605,7 @@ MACHINE_START(BAST, "Simtec-BAST")
/* Maintainer: Ben Dooks <ben@simtec.co.uk> */
.atag_offset = 0x100,
.map_io = bast_map_io,
- .init_irq = s3c24xx_init_irq,
+ .init_irq = s3c2410_init_irq,
.init_machine = bast_init,
.init_time = samsung_timer_init,
.restart = s3c2410_restart,
diff --git a/arch/arm/mach-s3c24xx/mach-h1940.c b/arch/arm/mach-s3c24xx/mach-h1940.c
index 8dd660102846..af4334d6b4d5 100644
--- a/arch/arm/mach-s3c24xx/mach-h1940.c
+++ b/arch/arm/mach-s3c24xx/mach-h1940.c
@@ -667,11 +667,6 @@ static void __init h1940_reserve(void)
memblock_reserve(0x30081000, 0x1000);
}
-static void __init h1940_init_irq(void)
-{
- s3c24xx_init_irq();
-}
-
static void __init h1940_init(void)
{
u32 tmp;
@@ -740,7 +735,7 @@ MACHINE_START(H1940, "IPAQ-H1940")
.atag_offset = 0x100,
.map_io = h1940_map_io,
.reserve = h1940_reserve,
- .init_irq = h1940_init_irq,
+ .init_irq = s3c2410_init_irq,
.init_machine = h1940_init,
.init_time = samsung_timer_init,
.restart = s3c2410_restart,
diff --git a/arch/arm/mach-s3c24xx/mach-n30.c b/arch/arm/mach-s3c24xx/mach-n30.c
index 73a690f431e6..2cb46c37c920 100644
--- a/arch/arm/mach-s3c24xx/mach-n30.c
+++ b/arch/arm/mach-s3c24xx/mach-n30.c
@@ -592,7 +592,7 @@ MACHINE_START(N30, "Acer-N30")
.atag_offset = 0x100,
.init_time = samsung_timer_init,
.init_machine = n30_init,
- .init_irq = s3c24xx_init_irq,
+ .init_irq = s3c2410_init_irq,
.map_io = n30_map_io,
.restart = s3c2410_restart,
MACHINE_END
@@ -603,7 +603,7 @@ MACHINE_START(N35, "Acer-N35")
.atag_offset = 0x100,
.init_time = samsung_timer_init,
.init_machine = n30_init,
- .init_irq = s3c24xx_init_irq,
+ .init_irq = s3c2410_init_irq,
.map_io = n30_map_io,
.restart = s3c2410_restart,
MACHINE_END
diff --git a/arch/arm/mach-s3c24xx/mach-otom.c b/arch/arm/mach-s3c24xx/mach-otom.c
index 7b8670746b6a..7e16b0740ec1 100644
--- a/arch/arm/mach-s3c24xx/mach-otom.c
+++ b/arch/arm/mach-s3c24xx/mach-otom.c
@@ -116,7 +116,7 @@ MACHINE_START(OTOM, "Nex Vision - Otom 1.1")
.atag_offset = 0x100,
.map_io = otom11_map_io,
.init_machine = otom11_init,
- .init_irq = s3c24xx_init_irq,
+ .init_irq = s3c2410_init_irq,
.init_time = samsung_timer_init,
.restart = s3c2410_restart,
MACHINE_END
diff --git a/arch/arm/mach-s3c24xx/mach-qt2410.c b/arch/arm/mach-s3c24xx/mach-qt2410.c
index 71cf29b12d1f..f8feaeadb55a 100644
--- a/arch/arm/mach-s3c24xx/mach-qt2410.c
+++ b/arch/arm/mach-s3c24xx/mach-qt2410.c
@@ -343,7 +343,7 @@ static void __init qt2410_machine_init(void)
MACHINE_START(QT2410, "QT2410")
.atag_offset = 0x100,
.map_io = qt2410_map_io,
- .init_irq = s3c24xx_init_irq,
+ .init_irq = s3c2410_init_irq,
.init_machine = qt2410_machine_init,
.init_time = samsung_timer_init,
.restart = s3c2410_restart,
diff --git a/arch/arm/mach-s3c24xx/mach-smdk2410.c b/arch/arm/mach-s3c24xx/mach-smdk2410.c
index fd96f7fc330c..a773789e4f38 100644
--- a/arch/arm/mach-s3c24xx/mach-smdk2410.c
+++ b/arch/arm/mach-s3c24xx/mach-smdk2410.c
@@ -116,7 +116,7 @@ MACHINE_START(SMDK2410, "SMDK2410") /* @TODO: request a new identifier and switc
/* Maintainer: Jonas Dietsche */
.atag_offset = 0x100,
.map_io = smdk2410_map_io,
- .init_irq = s3c24xx_init_irq,
+ .init_irq = s3c2410_init_irq,
.init_machine = smdk2410_init,
.init_time = samsung_timer_init,
.restart = s3c2410_restart,
diff --git a/arch/arm/mach-s3c24xx/mach-tct_hammer.c b/arch/arm/mach-s3c24xx/mach-tct_hammer.c
index 31dfe589e349..7fad8f055cab 100644
--- a/arch/arm/mach-s3c24xx/mach-tct_hammer.c
+++ b/arch/arm/mach-s3c24xx/mach-tct_hammer.c
@@ -149,7 +149,7 @@ static void __init tct_hammer_init(void)
MACHINE_START(TCT_HAMMER, "TCT_HAMMER")
.atag_offset = 0x100,
.map_io = tct_hammer_map_io,
- .init_irq = s3c24xx_init_irq,
+ .init_irq = s3c2410_init_irq,
.init_machine = tct_hammer_init,
.init_time = samsung_timer_init,
.restart = s3c2410_restart,
diff --git a/arch/arm/mach-s3c24xx/mach-vr1000.c b/arch/arm/mach-s3c24xx/mach-vr1000.c
index deeb8a0a4034..42e7187fed60 100644
--- a/arch/arm/mach-s3c24xx/mach-vr1000.c
+++ b/arch/arm/mach-s3c24xx/mach-vr1000.c
@@ -355,7 +355,7 @@ MACHINE_START(VR1000, "Thorcom-VR1000")
.atag_offset = 0x100,
.map_io = vr1000_map_io,
.init_machine = vr1000_init,
- .init_irq = s3c24xx_init_irq,
+ .init_irq = s3c2410_init_irq,
.init_time = samsung_timer_init,
.restart = s3c2410_restart,
MACHINE_END
diff --git a/arch/arm/plat-samsung/include/plat/cpu.h b/arch/arm/plat-samsung/include/plat/cpu.h
index 0f6c47a6475b..989fefe18be6 100644
--- a/arch/arm/plat-samsung/include/plat/cpu.h
+++ b/arch/arm/plat-samsung/include/plat/cpu.h
@@ -183,7 +183,6 @@ extern void s3c_init_cpu(unsigned long idcode,
/* core initialisation functions */
-extern void s3c24xx_init_irq(void);
extern void s5p_init_irq(u32 *vic, u32 num_vic);
extern void s3c24xx_init_io(struct map_desc *mach_desc, int size);
diff --git a/drivers/irqchip/Makefile b/drivers/irqchip/Makefile
index e41ceb9bec22..acf98953272a 100644
--- a/drivers/irqchip/Makefile
+++ b/drivers/irqchip/Makefile
@@ -2,6 +2,7 @@ obj-$(CONFIG_IRQCHIP) += irqchip.o
obj-$(CONFIG_ARCH_BCM2835) += irq-bcm2835.o
obj-$(CONFIG_ARCH_EXYNOS) += exynos-combiner.o
+obj-$(CONFIG_ARCH_S3C24XX) += irq-s3c24xx.o
obj-$(CONFIG_METAG) += irq-metag-ext.o
obj-$(CONFIG_METAG_PERFCOUNTER_IRQS) += irq-metag.o
obj-$(CONFIG_ARCH_SUNXI) += irq-sunxi.o
diff --git a/arch/arm/mach-s3c24xx/irq.c b/drivers/irqchip/irq-s3c24xx.c
index 3f3de7492094..5e40b3424df8 100644
--- a/arch/arm/mach-s3c24xx/irq.c
+++ b/drivers/irqchip/irq-s3c24xx.c
@@ -25,7 +25,11 @@
#include <linux/ioport.h>
#include <linux/device.h>
#include <linux/irqdomain.h>
+#include <linux/of.h>
+#include <linux/of_irq.h>
+#include <linux/of_address.h>
+#include <asm/exception.h>
#include <asm/mach/irq.h>
#include <mach/regs-irq.h>
@@ -35,6 +39,8 @@
#include <plat/regs-irqtype.h>
#include <plat/pm.h>
+#include "irqchip.h"
+
#define S3C_IRQTYPE_NONE 0
#define S3C_IRQTYPE_EINT 1
#define S3C_IRQTYPE_EDGE 2
@@ -42,6 +48,7 @@
struct s3c_irq_data {
unsigned int type;
+ unsigned long offset;
unsigned long parent_irq;
/* data gets filled during init */
@@ -68,23 +75,34 @@ struct s3c_irq_intc {
struct s3c_irq_data *irqs;
};
+/*
+ * Array holding pointers to the global controller structs
+ * [0] ... main_intc
+ * [1] ... sub_intc
+ * [2] ... main_intc2 on s3c2416
+ */
+static struct s3c_irq_intc *s3c_intc[3];
+
static void s3c_irq_mask(struct irq_data *data)
{
- struct s3c_irq_intc *intc = data->domain->host_data;
+ struct s3c_irq_data *irq_data = irq_data_get_irq_chip_data(data);
+ struct s3c_irq_intc *intc = irq_data->intc;
struct s3c_irq_intc *parent_intc = intc->parent;
- struct s3c_irq_data *irq_data = &intc->irqs[data->hwirq];
struct s3c_irq_data *parent_data;
unsigned long mask;
unsigned int irqno;
mask = __raw_readl(intc->reg_mask);
- mask |= (1UL << data->hwirq);
+ mask |= (1UL << irq_data->offset);
__raw_writel(mask, intc->reg_mask);
- if (parent_intc && irq_data->parent_irq) {
+ if (parent_intc) {
parent_data = &parent_intc->irqs[irq_data->parent_irq];
- /* check to see if we need to mask the parent IRQ */
+ /* check to see if we need to mask the parent IRQ
+ * The parent_irq is always in main_intc, so the hwirq
+ * for find_mapping does not need an offset in any case.
+ */
if ((mask & parent_data->sub_bits) == parent_data->sub_bits) {
irqno = irq_find_mapping(parent_intc->domain,
irq_data->parent_irq);
@@ -95,17 +113,17 @@ static void s3c_irq_mask(struct irq_data *data)
static void s3c_irq_unmask(struct irq_data *data)
{
- struct s3c_irq_intc *intc = data->domain->host_data;
+ struct s3c_irq_data *irq_data = irq_data_get_irq_chip_data(data);
+ struct s3c_irq_intc *intc = irq_data->intc;
struct s3c_irq_intc *parent_intc = intc->parent;
- struct s3c_irq_data *irq_data = &intc->irqs[data->hwirq];
unsigned long mask;
unsigned int irqno;
mask = __raw_readl(intc->reg_mask);
- mask &= ~(1UL << data->hwirq);
+ mask &= ~(1UL << irq_data->offset);
__raw_writel(mask, intc->reg_mask);
- if (parent_intc && irq_data->parent_irq) {
+ if (parent_intc) {
irqno = irq_find_mapping(parent_intc->domain,
irq_data->parent_irq);
s3c_irq_unmask(irq_get_irq_data(irqno));
@@ -114,14 +132,37 @@ static void s3c_irq_unmask(struct irq_data *data)
static inline void s3c_irq_ack(struct irq_data *data)
{
- struct s3c_irq_intc *intc = data->domain->host_data;
- unsigned long bitval = 1UL << data->hwirq;
+ struct s3c_irq_data *irq_data = irq_data_get_irq_chip_data(data);
+ struct s3c_irq_intc *intc = irq_data->intc;
+ unsigned long bitval = 1UL << irq_data->offset;
__raw_writel(bitval, intc->reg_pending);
if (intc->reg_intpnd)
__raw_writel(bitval, intc->reg_intpnd);
}
+static int s3c_irq_type(struct irq_data *data, unsigned int type)
+{
+ switch (type) {
+ case IRQ_TYPE_NONE:
+ break;
+ case IRQ_TYPE_EDGE_RISING:
+ case IRQ_TYPE_EDGE_FALLING:
+ case IRQ_TYPE_EDGE_BOTH:
+ irq_set_handler(data->irq, handle_edge_irq);
+ break;
+ case IRQ_TYPE_LEVEL_LOW:
+ case IRQ_TYPE_LEVEL_HIGH:
+ irq_set_handler(data->irq, handle_level_irq);
+ break;
+ default:
+ pr_err("No such irq type %d", type);
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
static int s3c_irqext_type_set(void __iomem *gpcon_reg,
void __iomem *extint_reg,
unsigned long gpcon_offset,
@@ -227,6 +268,7 @@ static struct irq_chip s3c_irq_chip = {
.irq_ack = s3c_irq_ack,
.irq_mask = s3c_irq_mask,
.irq_unmask = s3c_irq_unmask,
+ .irq_set_type = s3c_irq_type,
.irq_set_wake = s3c_irq_wake
};
@@ -235,6 +277,7 @@ static struct irq_chip s3c_irq_level_chip = {
.irq_mask = s3c_irq_mask,
.irq_unmask = s3c_irq_unmask,
.irq_ack = s3c_irq_ack,
+ .irq_set_type = s3c_irq_type,
};
static struct irq_chip s3c_irqext_chip = {
@@ -258,12 +301,19 @@ static struct irq_chip s3c_irq_eint0t4 = {
static void s3c_irq_demux(unsigned int irq, struct irq_desc *desc)
{
struct irq_chip *chip = irq_desc_get_chip(desc);
- struct s3c_irq_intc *intc = desc->irq_data.domain->host_data;
- struct s3c_irq_data *irq_data = &intc->irqs[desc->irq_data.hwirq];
+ struct s3c_irq_data *irq_data = irq_desc_get_chip_data(desc);
+ struct s3c_irq_intc *intc = irq_data->intc;
struct s3c_irq_intc *sub_intc = irq_data->sub_intc;
unsigned long src;
unsigned long msk;
unsigned int n;
+ unsigned int offset;
+
+ /* we're using individual domains for the non-dt case
+ * and one big domain for the dt case where the subintc
+ * starts at hwirq number 32.
+ */
+ offset = (intc->domain->of_node) ? 32 : 0;
chained_irq_enter(chip, desc);
@@ -276,12 +326,64 @@ static void s3c_irq_demux(unsigned int irq, struct irq_desc *desc)
while (src) {
n = __ffs(src);
src &= ~(1 << n);
- generic_handle_irq(irq_find_mapping(sub_intc->domain, n));
+ irq = irq_find_mapping(sub_intc->domain, offset + n);
+ generic_handle_irq(irq);
}
chained_irq_exit(chip, desc);
}
+static inline int s3c24xx_handle_intc(struct s3c_irq_intc *intc,
+ struct pt_regs *regs, int intc_offset)
+{
+ int pnd;
+ int offset;
+ int irq;
+
+ pnd = __raw_readl(intc->reg_intpnd);
+ if (!pnd)
+ return false;
+
+ /* non-dt machines use individual domains */
+ if (!intc->domain->of_node)
+ intc_offset = 0;
+
+ /* We have a problem that the INTOFFSET register does not always
+ * show one interrupt. Occasionally we get two interrupts through
+ * the prioritiser, and this causes the INTOFFSET register to show
+ * what looks like the logical-or of the two interrupt numbers.
+ *
+ * Thanks to Klaus, Shannon, et al for helping to debug this problem
+ */
+ offset = __raw_readl(intc->reg_intpnd + 4);
+
+ /* Find the bit manually, when the offset is wrong.
+ * The pending register only ever contains the one bit of the next
+ * interrupt to handle.
+ */
+ if (!(pnd & (1 << offset)))
+ offset = __ffs(pnd);
+
+ irq = irq_find_mapping(intc->domain, intc_offset + offset);
+ handle_IRQ(irq, regs);
+ return true;
+}
+
+asmlinkage void __exception_irq_entry s3c24xx_handle_irq(struct pt_regs *regs)
+{
+ do {
+ if (likely(s3c_intc[0]))
+ if (s3c24xx_handle_intc(s3c_intc[0], regs, 0))
+ continue;
+
+ if (s3c_intc[2])
+ if (s3c24xx_handle_intc(s3c_intc[2], regs, 64))
+ continue;
+
+ break;
+ } while (1);
+}
+
#ifdef CONFIG_FIQ
/**
* s3c24xx_set_fiq - set the FIQ routing
@@ -324,18 +426,11 @@ static int s3c24xx_irq_map(struct irq_domain *h, unsigned int virq,
struct s3c_irq_data *parent_irq_data;
unsigned int irqno;
- if (!intc) {
- pr_err("irq-s3c24xx: no controller found for hwirq %lu\n", hw);
- return -EINVAL;
- }
-
- if (!irq_data) {
- pr_err("irq-s3c24xx: no irq data found for hwirq %lu\n", hw);
- return -EINVAL;
- }
-
/* attach controller pointer to irq_data */
irq_data->intc = intc;
+ irq_data->offset = hw;
+
+ parent_intc = intc->parent;
/* set handler and flags */
switch (irq_data->type) {
@@ -345,7 +440,7 @@ static int s3c24xx_irq_map(struct irq_domain *h, unsigned int virq,
/* On the S3C2412, the EINT0to3 have a parent irq
* but need the s3c_irq_eint0t4 chip
*/
- if (irq_data->parent_irq && (!soc_is_s3c2412() || hw >= 4))
+ if (parent_intc && (!soc_is_s3c2412() || hw >= 4))
irq_set_chip_and_handler(virq, &s3c_irqext_chip,
handle_edge_irq);
else
@@ -353,8 +448,7 @@ static int s3c24xx_irq_map(struct irq_domain *h, unsigned int virq,
handle_edge_irq);
break;
case S3C_IRQTYPE_EDGE:
- if (irq_data->parent_irq ||
- intc->reg_pending == S3C2416_SRCPND2)
+ if (parent_intc || intc->reg_pending == S3C2416_SRCPND2)
irq_set_chip_and_handler(virq, &s3c_irq_level_chip,
handle_edge_irq);
else
@@ -362,7 +456,7 @@ static int s3c24xx_irq_map(struct irq_domain *h, unsigned int virq,
handle_edge_irq);
break;
case S3C_IRQTYPE_LEVEL:
- if (irq_data->parent_irq)
+ if (parent_intc)
irq_set_chip_and_handler(virq, &s3c_irq_level_chip,
handle_level_irq);
else
@@ -373,23 +467,19 @@ static int s3c24xx_irq_map(struct irq_domain *h, unsigned int virq,
pr_err("irq-s3c24xx: unsupported irqtype %d\n", irq_data->type);
return -EINVAL;
}
+
+ irq_set_chip_data(virq, irq_data);
+
set_irq_flags(virq, IRQF_VALID);
- if (irq_data->parent_irq) {
- parent_intc = intc->parent;
- if (!parent_intc) {
- pr_err("irq-s3c24xx: no parent controller found for hwirq %lu\n",
- hw);
+ if (parent_intc && irq_data->type != S3C_IRQTYPE_NONE) {
+ if (irq_data->parent_irq > 31) {
+ pr_err("irq-s3c24xx: parent irq %lu is out of range\n",
+ irq_data->parent_irq);
goto err;
}
parent_irq_data = &parent_intc->irqs[irq_data->parent_irq];
- if (!irq_data) {
- pr_err("irq-s3c24xx: no irq data found for hwirq %lu\n",
- hw);
- goto err;
- }
-
parent_irq_data->sub_intc = intc;
parent_irq_data->sub_bits |= (1UL << hw);
@@ -444,7 +534,7 @@ static void s3c24xx_clear_intc(struct s3c_irq_intc *intc)
}
}
-struct s3c_irq_intc *s3c24xx_init_intc(struct device_node *np,
+static struct s3c_irq_intc *s3c24xx_init_intc(struct device_node *np,
struct s3c_irq_data *irq_data,
struct s3c_irq_intc *parent,
unsigned long address)
@@ -518,6 +608,8 @@ struct s3c_irq_intc *s3c24xx_init_intc(struct device_node *np,
goto err;
}
+ set_handle_irq(s3c24xx_handle_irq);
+
return intc;
err:
@@ -525,12 +617,35 @@ err:
return ERR_PTR(ret);
}
-/* s3c24xx_init_irq
- *
- * Initialise S3C2410 IRQ system
-*/
+static struct s3c_irq_data init_eint[32] = {
+ { .type = S3C_IRQTYPE_NONE, }, /* reserved */
+ { .type = S3C_IRQTYPE_NONE, }, /* reserved */
+ { .type = S3C_IRQTYPE_NONE, }, /* reserved */
+ { .type = S3C_IRQTYPE_NONE, }, /* reserved */
+ { .type = S3C_IRQTYPE_EINT, .parent_irq = 4 }, /* EINT4 */
+ { .type = S3C_IRQTYPE_EINT, .parent_irq = 4 }, /* EINT5 */
+ { .type = S3C_IRQTYPE_EINT, .parent_irq = 4 }, /* EINT6 */
+ { .type = S3C_IRQTYPE_EINT, .parent_irq = 4 }, /* EINT7 */
+ { .type = S3C_IRQTYPE_EINT, .parent_irq = 5 }, /* EINT8 */
+ { .type = S3C_IRQTYPE_EINT, .parent_irq = 5 }, /* EINT9 */
+ { .type = S3C_IRQTYPE_EINT, .parent_irq = 5 }, /* EINT10 */
+ { .type = S3C_IRQTYPE_EINT, .parent_irq = 5 }, /* EINT11 */
+ { .type = S3C_IRQTYPE_EINT, .parent_irq = 5 }, /* EINT12 */
+ { .type = S3C_IRQTYPE_EINT, .parent_irq = 5 }, /* EINT13 */
+ { .type = S3C_IRQTYPE_EINT, .parent_irq = 5 }, /* EINT14 */
+ { .type = S3C_IRQTYPE_EINT, .parent_irq = 5 }, /* EINT15 */
+ { .type = S3C_IRQTYPE_EINT, .parent_irq = 5 }, /* EINT16 */
+ { .type = S3C_IRQTYPE_EINT, .parent_irq = 5 }, /* EINT17 */
+ { .type = S3C_IRQTYPE_EINT, .parent_irq = 5 }, /* EINT18 */
+ { .type = S3C_IRQTYPE_EINT, .parent_irq = 5 }, /* EINT19 */
+ { .type = S3C_IRQTYPE_EINT, .parent_irq = 5 }, /* EINT20 */
+ { .type = S3C_IRQTYPE_EINT, .parent_irq = 5 }, /* EINT21 */
+ { .type = S3C_IRQTYPE_EINT, .parent_irq = 5 }, /* EINT22 */
+ { .type = S3C_IRQTYPE_EINT, .parent_irq = 5 }, /* EINT23 */
+};
-static struct s3c_irq_data init_base[32] = {
+#ifdef CONFIG_CPU_S3C2410
+static struct s3c_irq_data init_s3c2410base[32] = {
{ .type = S3C_IRQTYPE_EINT, }, /* EINT0 */
{ .type = S3C_IRQTYPE_EINT, }, /* EINT1 */
{ .type = S3C_IRQTYPE_EINT, }, /* EINT2 */
@@ -565,34 +680,7 @@ static struct s3c_irq_data init_base[32] = {
{ .type = S3C_IRQTYPE_LEVEL, }, /* ADCPARENT */
};
-static struct s3c_irq_data init_eint[32] = {
- { .type = S3C_IRQTYPE_NONE, }, /* reserved */
- { .type = S3C_IRQTYPE_NONE, }, /* reserved */
- { .type = S3C_IRQTYPE_NONE, }, /* reserved */
- { .type = S3C_IRQTYPE_NONE, }, /* reserved */
- { .type = S3C_IRQTYPE_EINT, .parent_irq = 4 }, /* EINT4 */
- { .type = S3C_IRQTYPE_EINT, .parent_irq = 4 }, /* EINT5 */
- { .type = S3C_IRQTYPE_EINT, .parent_irq = 4 }, /* EINT6 */
- { .type = S3C_IRQTYPE_EINT, .parent_irq = 4 }, /* EINT7 */
- { .type = S3C_IRQTYPE_EINT, .parent_irq = 5 }, /* EINT8 */
- { .type = S3C_IRQTYPE_EINT, .parent_irq = 5 }, /* EINT9 */
- { .type = S3C_IRQTYPE_EINT, .parent_irq = 5 }, /* EINT10 */
- { .type = S3C_IRQTYPE_EINT, .parent_irq = 5 }, /* EINT11 */
- { .type = S3C_IRQTYPE_EINT, .parent_irq = 5 }, /* EINT12 */
- { .type = S3C_IRQTYPE_EINT, .parent_irq = 5 }, /* EINT13 */
- { .type = S3C_IRQTYPE_EINT, .parent_irq = 5 }, /* EINT14 */
- { .type = S3C_IRQTYPE_EINT, .parent_irq = 5 }, /* EINT15 */
- { .type = S3C_IRQTYPE_EINT, .parent_irq = 5 }, /* EINT16 */
- { .type = S3C_IRQTYPE_EINT, .parent_irq = 5 }, /* EINT17 */
- { .type = S3C_IRQTYPE_EINT, .parent_irq = 5 }, /* EINT18 */
- { .type = S3C_IRQTYPE_EINT, .parent_irq = 5 }, /* EINT19 */
- { .type = S3C_IRQTYPE_EINT, .parent_irq = 5 }, /* EINT20 */
- { .type = S3C_IRQTYPE_EINT, .parent_irq = 5 }, /* EINT21 */
- { .type = S3C_IRQTYPE_EINT, .parent_irq = 5 }, /* EINT22 */
- { .type = S3C_IRQTYPE_EINT, .parent_irq = 5 }, /* EINT23 */
-};
-
-static struct s3c_irq_data init_subint[32] = {
+static struct s3c_irq_data init_s3c2410subint[32] = {
{ .type = S3C_IRQTYPE_LEVEL, .parent_irq = 28 }, /* UART0-RX */
{ .type = S3C_IRQTYPE_LEVEL, .parent_irq = 28 }, /* UART0-TX */
{ .type = S3C_IRQTYPE_LEVEL, .parent_irq = 28 }, /* UART0-ERR */
@@ -606,23 +694,24 @@ static struct s3c_irq_data init_subint[32] = {
{ .type = S3C_IRQTYPE_EDGE, .parent_irq = 31 }, /* ADC */
};
-void __init s3c24xx_init_irq(void)
+void __init s3c2410_init_irq(void)
{
- struct s3c_irq_intc *main_intc;
-
#ifdef CONFIG_FIQ
init_FIQ(FIQ_START);
#endif
- main_intc = s3c24xx_init_intc(NULL, &init_base[0], NULL, 0x4a000000);
- if (IS_ERR(main_intc)) {
+ s3c_intc[0] = s3c24xx_init_intc(NULL, &init_s3c2410base[0], NULL,
+ 0x4a000000);
+ if (IS_ERR(s3c_intc[0])) {
pr_err("irq: could not create main interrupt controller\n");
return;
}
- s3c24xx_init_intc(NULL, &init_subint[0], main_intc, 0x4a000018);
- s3c24xx_init_intc(NULL, &init_eint[0], main_intc, 0x560000a4);
+ s3c_intc[1] = s3c24xx_init_intc(NULL, &init_s3c2410subint[0],
+ s3c_intc[0], 0x4a000018);
+ s3c24xx_init_intc(NULL, &init_eint[0], s3c_intc[0], 0x560000a4);
}
+#endif
#ifdef CONFIG_CPU_S3C2412
static struct s3c_irq_data init_s3c2412base[32] = {
@@ -707,22 +796,22 @@ static struct s3c_irq_data init_s3c2412subint[32] = {
void s3c2412_init_irq(void)
{
- struct s3c_irq_intc *main_intc;
-
pr_info("S3C2412: IRQ Support\n");
#ifdef CONFIG_FIQ
init_FIQ(FIQ_START);
#endif
- main_intc = s3c24xx_init_intc(NULL, &init_s3c2412base[0], NULL, 0x4a000000);
- if (IS_ERR(main_intc)) {
+ s3c_intc[0] = s3c24xx_init_intc(NULL, &init_s3c2412base[0], NULL,
+ 0x4a000000);
+ if (IS_ERR(s3c_intc[0])) {
pr_err("irq: could not create main interrupt controller\n");
return;
}
- s3c24xx_init_intc(NULL, &init_s3c2412eint[0], main_intc, 0x560000a4);
- s3c24xx_init_intc(NULL, &init_s3c2412subint[0], main_intc, 0x4a000018);
+ s3c24xx_init_intc(NULL, &init_s3c2412eint[0], s3c_intc[0], 0x560000a4);
+ s3c_intc[1] = s3c24xx_init_intc(NULL, &init_s3c2412subint[0],
+ s3c_intc[0], 0x4a000018);
}
#endif
@@ -796,35 +885,35 @@ static struct s3c_irq_data init_s3c2416subint[32] = {
static struct s3c_irq_data init_s3c2416_second[32] = {
{ .type = S3C_IRQTYPE_EDGE }, /* 2D */
- { .type = S3C_IRQTYPE_EDGE }, /* IIC1 */
+ { .type = S3C_IRQTYPE_NONE }, /* reserved */
{ .type = S3C_IRQTYPE_NONE }, /* reserved */
{ .type = S3C_IRQTYPE_NONE }, /* reserved */
{ .type = S3C_IRQTYPE_EDGE }, /* PCM0 */
- { .type = S3C_IRQTYPE_EDGE }, /* PCM1 */
+ { .type = S3C_IRQTYPE_NONE }, /* reserved */
{ .type = S3C_IRQTYPE_EDGE }, /* I2S0 */
- { .type = S3C_IRQTYPE_EDGE }, /* I2S1 */
};
void __init s3c2416_init_irq(void)
{
- struct s3c_irq_intc *main_intc;
-
pr_info("S3C2416: IRQ Support\n");
#ifdef CONFIG_FIQ
init_FIQ(FIQ_START);
#endif
- main_intc = s3c24xx_init_intc(NULL, &init_s3c2416base[0], NULL, 0x4a000000);
- if (IS_ERR(main_intc)) {
+ s3c_intc[0] = s3c24xx_init_intc(NULL, &init_s3c2416base[0], NULL,
+ 0x4a000000);
+ if (IS_ERR(s3c_intc[0])) {
pr_err("irq: could not create main interrupt controller\n");
return;
}
- s3c24xx_init_intc(NULL, &init_eint[0], main_intc, 0x560000a4);
- s3c24xx_init_intc(NULL, &init_s3c2416subint[0], main_intc, 0x4a000018);
+ s3c24xx_init_intc(NULL, &init_eint[0], s3c_intc[0], 0x560000a4);
+ s3c_intc[1] = s3c24xx_init_intc(NULL, &init_s3c2416subint[0],
+ s3c_intc[0], 0x4a000018);
- s3c24xx_init_intc(NULL, &init_s3c2416_second[0], NULL, 0x4a000040);
+ s3c_intc[2] = s3c24xx_init_intc(NULL, &init_s3c2416_second[0],
+ NULL, 0x4a000040);
}
#endif
@@ -877,30 +966,30 @@ static struct s3c_irq_data init_s3c2440subint[32] = {
{ .type = S3C_IRQTYPE_LEVEL, .parent_irq = 15 }, /* UART2-ERR */
{ .type = S3C_IRQTYPE_EDGE, .parent_irq = 31 }, /* TC */
{ .type = S3C_IRQTYPE_EDGE, .parent_irq = 31 }, /* ADC */
- { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 6 }, /* TC */
- { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 6 }, /* ADC */
+ { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 6 }, /* CAM_C */
+ { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 6 }, /* CAM_P */
{ .type = S3C_IRQTYPE_LEVEL, .parent_irq = 9 }, /* WDT */
{ .type = S3C_IRQTYPE_LEVEL, .parent_irq = 9 }, /* AC97 */
};
void __init s3c2440_init_irq(void)
{
- struct s3c_irq_intc *main_intc;
-
pr_info("S3C2440: IRQ Support\n");
#ifdef CONFIG_FIQ
init_FIQ(FIQ_START);
#endif
- main_intc = s3c24xx_init_intc(NULL, &init_s3c2440base[0], NULL, 0x4a000000);
- if (IS_ERR(main_intc)) {
+ s3c_intc[0] = s3c24xx_init_intc(NULL, &init_s3c2440base[0], NULL,
+ 0x4a000000);
+ if (IS_ERR(s3c_intc[0])) {
pr_err("irq: could not create main interrupt controller\n");
return;
}
- s3c24xx_init_intc(NULL, &init_eint[0], main_intc, 0x560000a4);
- s3c24xx_init_intc(NULL, &init_s3c2440subint[0], main_intc, 0x4a000018);
+ s3c24xx_init_intc(NULL, &init_eint[0], s3c_intc[0], 0x560000a4);
+ s3c_intc[1] = s3c24xx_init_intc(NULL, &init_s3c2440subint[0],
+ s3c_intc[0], 0x4a000018);
}
#endif
@@ -952,28 +1041,28 @@ static struct s3c_irq_data init_s3c2442subint[32] = {
{ .type = S3C_IRQTYPE_LEVEL, .parent_irq = 15 }, /* UART2-ERR */
{ .type = S3C_IRQTYPE_EDGE, .parent_irq = 31 }, /* TC */
{ .type = S3C_IRQTYPE_EDGE, .parent_irq = 31 }, /* ADC */
- { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 6 }, /* TC */
- { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 6 }, /* ADC */
+ { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 6 }, /* CAM_C */
+ { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 6 }, /* CAM_P */
};
void __init s3c2442_init_irq(void)
{
- struct s3c_irq_intc *main_intc;
-
pr_info("S3C2442: IRQ Support\n");
#ifdef CONFIG_FIQ
init_FIQ(FIQ_START);
#endif
- main_intc = s3c24xx_init_intc(NULL, &init_s3c2442base[0], NULL, 0x4a000000);
- if (IS_ERR(main_intc)) {
+ s3c_intc[0] = s3c24xx_init_intc(NULL, &init_s3c2442base[0], NULL,
+ 0x4a000000);
+ if (IS_ERR(s3c_intc[0])) {
pr_err("irq: could not create main interrupt controller\n");
return;
}
- s3c24xx_init_intc(NULL, &init_eint[0], main_intc, 0x560000a4);
- s3c24xx_init_intc(NULL, &init_s3c2442subint[0], main_intc, 0x4a000018);
+ s3c24xx_init_intc(NULL, &init_eint[0], s3c_intc[0], 0x560000a4);
+ s3c_intc[1] = s3c24xx_init_intc(NULL, &init_s3c2442subint[0],
+ s3c_intc[0], 0x4a000018);
}
#endif
@@ -1048,21 +1137,219 @@ static struct s3c_irq_data init_s3c2443subint[32] = {
void __init s3c2443_init_irq(void)
{
- struct s3c_irq_intc *main_intc;
-
pr_info("S3C2443: IRQ Support\n");
#ifdef CONFIG_FIQ
init_FIQ(FIQ_START);
#endif
- main_intc = s3c24xx_init_intc(NULL, &init_s3c2443base[0], NULL, 0x4a000000);
- if (IS_ERR(main_intc)) {
+ s3c_intc[0] = s3c24xx_init_intc(NULL, &init_s3c2443base[0], NULL,
+ 0x4a000000);
+ if (IS_ERR(s3c_intc[0])) {
pr_err("irq: could not create main interrupt controller\n");
return;
}
- s3c24xx_init_intc(NULL, &init_eint[0], main_intc, 0x560000a4);
- s3c24xx_init_intc(NULL, &init_s3c2443subint[0], main_intc, 0x4a000018);
+ s3c24xx_init_intc(NULL, &init_eint[0], s3c_intc[0], 0x560000a4);
+ s3c_intc[1] = s3c24xx_init_intc(NULL, &init_s3c2443subint[0],
+ s3c_intc[0], 0x4a000018);
+}
+#endif
+
+#ifdef CONFIG_OF
+static int s3c24xx_irq_map_of(struct irq_domain *h, unsigned int virq,
+ irq_hw_number_t hw)
+{
+ unsigned int ctrl_num = hw / 32;
+ unsigned int intc_hw = hw % 32;
+ struct s3c_irq_intc *intc = s3c_intc[ctrl_num];
+ struct s3c_irq_intc *parent_intc = intc->parent;
+ struct s3c_irq_data *irq_data = &intc->irqs[intc_hw];
+
+ /* attach controller pointer to irq_data */
+ irq_data->intc = intc;
+ irq_data->offset = intc_hw;
+
+ if (!parent_intc)
+ irq_set_chip_and_handler(virq, &s3c_irq_chip, handle_edge_irq);
+ else
+ irq_set_chip_and_handler(virq, &s3c_irq_level_chip,
+ handle_edge_irq);
+
+ irq_set_chip_data(virq, irq_data);
+
+ set_irq_flags(virq, IRQF_VALID);
+
+ return 0;
+}
+
+/* Translate our of irq notation
+ * format: <ctrl_num ctrl_irq parent_irq type>
+ */
+static int s3c24xx_irq_xlate_of(struct irq_domain *d, struct device_node *n,
+ const u32 *intspec, unsigned int intsize,
+ irq_hw_number_t *out_hwirq, unsigned int *out_type)
+{
+ struct s3c_irq_intc *intc;
+ struct s3c_irq_intc *parent_intc;
+ struct s3c_irq_data *irq_data;
+ struct s3c_irq_data *parent_irq_data;
+ int irqno;
+
+ if (WARN_ON(intsize < 4))
+ return -EINVAL;
+
+ if (intspec[0] > 2 || !s3c_intc[intspec[0]]) {
+ pr_err("controller number %d invalid\n", intspec[0]);
+ return -EINVAL;
+ }
+ intc = s3c_intc[intspec[0]];
+
+ *out_hwirq = intspec[0] * 32 + intspec[2];
+ *out_type = intspec[3] & IRQ_TYPE_SENSE_MASK;
+
+ parent_intc = intc->parent;
+ if (parent_intc) {
+ irq_data = &intc->irqs[intspec[2]];
+ irq_data->parent_irq = intspec[1];
+ parent_irq_data = &parent_intc->irqs[irq_data->parent_irq];
+ parent_irq_data->sub_intc = intc;
+ parent_irq_data->sub_bits |= (1UL << intspec[2]);
+
+ /* parent_intc is always s3c_intc[0], so no offset */
+ irqno = irq_create_mapping(parent_intc->domain, intspec[1]);
+ if (irqno < 0) {
+ pr_err("irq: could not map parent interrupt\n");
+ return irqno;
+ }
+
+ irq_set_chained_handler(irqno, s3c_irq_demux);
+ }
+
+ return 0;
+}
+
+static struct irq_domain_ops s3c24xx_irq_ops_of = {
+ .map = s3c24xx_irq_map_of,
+ .xlate = s3c24xx_irq_xlate_of,
+};
+
+struct s3c24xx_irq_of_ctrl {
+ char *name;
+ unsigned long offset;
+ struct s3c_irq_intc **handle;
+ struct s3c_irq_intc **parent;
+ struct irq_domain_ops *ops;
+};
+
+static int __init s3c_init_intc_of(struct device_node *np,
+ struct device_node *interrupt_parent,
+ struct s3c24xx_irq_of_ctrl *s3c_ctrl, int num_ctrl)
+{
+ struct s3c_irq_intc *intc;
+ struct s3c24xx_irq_of_ctrl *ctrl;
+ struct irq_domain *domain;
+ void __iomem *reg_base;
+ int i;
+
+ reg_base = of_iomap(np, 0);
+ if (!reg_base) {
+ pr_err("irq-s3c24xx: could not map irq registers\n");
+ return -EINVAL;
+ }
+
+ domain = irq_domain_add_linear(np, num_ctrl * 32,
+ &s3c24xx_irq_ops_of, NULL);
+ if (!domain) {
+ pr_err("irq: could not create irq-domain\n");
+ return -EINVAL;
+ }
+
+ for (i = 0; i < num_ctrl; i++) {
+ ctrl = &s3c_ctrl[i];
+
+ pr_debug("irq: found controller %s\n", ctrl->name);
+
+ intc = kzalloc(sizeof(struct s3c_irq_intc), GFP_KERNEL);
+ if (!intc)
+ return -ENOMEM;
+
+ intc->domain = domain;
+ intc->irqs = kzalloc(sizeof(struct s3c_irq_data) * 32,
+ GFP_KERNEL);
+ if (!intc->irqs) {
+ kfree(intc);
+ return -ENOMEM;
+ }
+
+ if (ctrl->parent) {
+ intc->reg_pending = reg_base + ctrl->offset;
+ intc->reg_mask = reg_base + ctrl->offset + 0x4;
+
+ if (*(ctrl->parent)) {
+ intc->parent = *(ctrl->parent);
+ } else {
+ pr_warn("irq: parent of %s missing\n",
+ ctrl->name);
+ kfree(intc->irqs);
+ kfree(intc);
+ continue;
+ }
+ } else {
+ intc->reg_pending = reg_base + ctrl->offset;
+ intc->reg_mask = reg_base + ctrl->offset + 0x08;
+ intc->reg_intpnd = reg_base + ctrl->offset + 0x10;
+ }
+
+ s3c24xx_clear_intc(intc);
+ s3c_intc[i] = intc;
+ }
+
+ set_handle_irq(s3c24xx_handle_irq);
+
+ return 0;
+}
+
+static struct s3c24xx_irq_of_ctrl s3c2410_ctrl[] = {
+ {
+ .name = "intc",
+ .offset = 0,
+ }, {
+ .name = "subintc",
+ .offset = 0x18,
+ .parent = &s3c_intc[0],
+ }
+};
+
+int __init s3c2410_init_intc_of(struct device_node *np,
+ struct device_node *interrupt_parent,
+ struct s3c24xx_irq_of_ctrl *ctrl, int num_ctrl)
+{
+ return s3c_init_intc_of(np, interrupt_parent,
+ s3c2410_ctrl, ARRAY_SIZE(s3c2410_ctrl));
+}
+IRQCHIP_DECLARE(s3c2410_irq, "samsung,s3c2410-irq", s3c2410_init_intc_of);
+
+static struct s3c24xx_irq_of_ctrl s3c2416_ctrl[] = {
+ {
+ .name = "intc",
+ .offset = 0,
+ }, {
+ .name = "subintc",
+ .offset = 0x18,
+ .parent = &s3c_intc[0],
+ }, {
+ .name = "intc2",
+ .offset = 0x40,
+ }
+};
+
+int __init s3c2416_init_intc_of(struct device_node *np,
+ struct device_node *interrupt_parent,
+ struct s3c24xx_irq_of_ctrl *ctrl, int num_ctrl)
+{
+ return s3c_init_intc_of(np, interrupt_parent,
+ s3c2416_ctrl, ARRAY_SIZE(s3c2416_ctrl));
}
+IRQCHIP_DECLARE(s3c2416_irq, "samsung,s3c2416-irq", s3c2416_init_intc_of);
#endif
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