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-rw-r--r--target/linux/ar7/files/arch/mips/ar7/irq.c172
1 files changed, 78 insertions, 94 deletions
diff --git a/target/linux/ar7/files/arch/mips/ar7/irq.c b/target/linux/ar7/files/arch/mips/ar7/irq.c
index 1a09aedc1..44cce5c40 100644
--- a/target/linux/ar7/files/arch/mips/ar7/irq.c
+++ b/target/linux/ar7/files/arch/mips/ar7/irq.c
@@ -1,28 +1,26 @@
/*
* $Id$
- *
+ *
* Copyright (C) 2006, 2007 OpenWrt.org
- *
+ *
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
- *
+ *
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
- *
+ *
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
-#include <linux/init.h>
#include <linux/interrupt.h>
-#include <linux/ioport.h>
+#include <linux/io.h>
-#include <asm/irq.h>
#include <asm/irq_cpu.h>
#include <asm/mipsregs.h>
#include <asm/ar7/ar7.h>
@@ -45,76 +43,75 @@
#define PM_OFFSET(irq) (REG_OFFSET(irq, 5)) /* 0x50 */
#define TM_OFFSET(irq) (REG_OFFSET(irq, 6)) /* 0x60 */
-#define REG(addr) (*(volatile u32 *)(KSEG1ADDR(AR7_REGS_IRQ) + addr))
+#define REG(addr) ((u32 *)(KSEG1ADDR(AR7_REGS_IRQ) + addr))
#define CHNL_OFFSET(chnl) (CHNLS_OFFSET + (chnl * 4))
static void ar7_unmask_irq(unsigned int irq_nr);
static void ar7_mask_irq(unsigned int irq_nr);
-static void ar7_unmask_secondary_irq(unsigned int irq_nr);
-static void ar7_mask_secondary_irq(unsigned int irq_nr);
-static irqreturn_t ar7_cascade(int interrupt, void *dev);
-static irqreturn_t ar7_secondary_cascade(int interrupt, void *dev);
+static void ar7_ack_irq(unsigned int irq_nr);
+static void ar7_unmask_sec_irq(unsigned int irq_nr);
+static void ar7_mask_sec_irq(unsigned int irq_nr);
+static void ar7_ack_sec_irq(unsigned int irq_nr);
+static void ar7_cascade(void);
static void ar7_irq_init(int base);
static int ar7_irq_base;
static struct irq_chip ar7_irq_type = {
- .typename = "AR7",
.name = "AR7",
.unmask = ar7_unmask_irq,
.mask = ar7_mask_irq,
+ .ack = ar7_ack_irq
};
-static struct irq_chip ar7_secondary_irq_type = {
+static struct irq_chip ar7_sec_irq_type = {
.name = "AR7",
- .unmask = ar7_unmask_secondary_irq,
- .mask = ar7_mask_secondary_irq,
+ .unmask = ar7_unmask_sec_irq,
+ .mask = ar7_mask_sec_irq,
+ .ack = ar7_ack_sec_irq,
};
static struct irqaction ar7_cascade_action = {
- .handler = ar7_cascade,
+ .handler = no_action,
.name = "AR7 cascade interrupt"
};
-static struct irqaction ar7_secondary_cascade_action = {
- .handler = ar7_secondary_cascade,
+static struct irqaction ar7_sec_cascade_action = {
+ .handler = no_action,
.name = "AR7 secondary cascade interrupt"
};
static void ar7_unmask_irq(unsigned int irq)
{
- unsigned long flags;
- local_irq_save(flags);
- /* enable the interrupt channel bit */
- REG(ESR_OFFSET(irq)) = 1 << ((irq - ar7_irq_base) % 32);
- local_irq_restore(flags);
+ writel(1 << ((irq - ar7_irq_base) % 32),
+ REG(ESR_OFFSET(irq - ar7_irq_base)));
}
static void ar7_mask_irq(unsigned int irq)
{
- unsigned long flags;
- local_irq_save(flags);
- /* disable the interrupt channel bit */
- REG(ECR_OFFSET(irq)) = 1 << ((irq - ar7_irq_base) % 32);
- local_irq_restore(flags);
+ writel(1 << ((irq - ar7_irq_base) % 32),
+ REG(ECR_OFFSET(irq - ar7_irq_base)));
}
-static void ar7_unmask_secondary_irq(unsigned int irq)
+static void ar7_ack_irq(unsigned int irq)
{
- unsigned long flags;
- local_irq_save(flags);
- /* enable the interrupt channel bit */
- REG(SEC_ESR_OFFSET) = 1 << (irq - ar7_irq_base - 40);
- local_irq_restore(flags);
+ writel(1 << ((irq - ar7_irq_base) % 32),
+ REG(CR_OFFSET(irq - ar7_irq_base)));
}
-static void ar7_mask_secondary_irq(unsigned int irq)
+static void ar7_unmask_sec_irq(unsigned int irq)
{
- unsigned long flags;
- local_irq_save(flags);
- /* disable the interrupt channel bit */
- REG(SEC_ECR_OFFSET) = 1 << (irq - ar7_irq_base - 40);
- local_irq_restore(flags);
+ writel(1 << (irq - ar7_irq_base - 40), REG(SEC_ESR_OFFSET));
+}
+
+static void ar7_mask_sec_irq(unsigned int irq)
+{
+ writel(1 << (irq - ar7_irq_base - 40), REG(SEC_ECR_OFFSET));
+}
+
+static void ar7_ack_sec_irq(unsigned int irq)
+{
+ writel(1 << (irq - ar7_irq_base - 40), REG(SEC_CR_OFFSET));
}
void __init arch_init_irq(void) {
@@ -125,81 +122,68 @@ void __init arch_init_irq(void) {
static void __init ar7_irq_init(int base)
{
int i;
- /*
- Disable interrupts and clear pending
- */
- REG(ECR_OFFSET(0)) = 0xffffffff;
- REG(ECR_OFFSET(32)) = 0xff;
- REG(SEC_ECR_OFFSET) = 0xffffffff;
- REG(CR_OFFSET(0)) = 0xffffffff;
- REG(CR_OFFSET(32)) = 0xff;
- REG(SEC_CR_OFFSET) = 0xffffffff;
+ /*
+ * Disable interrupts and clear pending
+ */
+ writel(0xffffffff, REG(ECR_OFFSET(0)));
+ writel(0xff, REG(ECR_OFFSET(32)));
+ writel(0xffffffff, REG(SEC_ECR_OFFSET));
+ writel(0xffffffff, REG(CR_OFFSET(0)));
+ writel(0xff, REG(CR_OFFSET(32)));
+ writel(0xffffffff, REG(SEC_CR_OFFSET));
ar7_irq_base = base;
- for(i = 0; i < 40; i++) {
- REG(CHNL_OFFSET(i)) = i;
+ for (i = 0; i < 40; i++) {
+ writel(i, REG(CHNL_OFFSET(i)));
/* Primary IRQ's */
- irq_desc[i + base].status = IRQ_DISABLED;
- irq_desc[i + base].action = NULL;
- irq_desc[i + base].depth = 1;
- irq_desc[i + base].chip = &ar7_irq_type;
+ set_irq_chip_and_handler(base + i, &ar7_irq_type,
+ handle_level_irq);
/* Secondary IRQ's */
- if (i < 32) {
- irq_desc[i + base + 40].status = IRQ_DISABLED;
- irq_desc[i + base + 40].action = NULL;
- irq_desc[i + base + 40].depth = 1;
- irq_desc[i + base + 40].chip = &ar7_secondary_irq_type;
- }
+ if (i < 32)
+ set_irq_chip_and_handler(base + i + 40,
+ &ar7_sec_irq_type,
+ handle_level_irq);
}
setup_irq(2, &ar7_cascade_action);
- setup_irq(ar7_irq_base, &ar7_secondary_cascade_action);
+ setup_irq(ar7_irq_base, &ar7_sec_cascade_action);
set_c0_status(IE_IRQ0);
}
-static irqreturn_t ar7_cascade(int interrupt, void *dev)
+static void ar7_cascade(void)
{
- int irq;
-
- irq = (REG(PIR_OFFSET) & 0x3F);
- REG(CR_OFFSET(irq)) = 1 << (irq % 32);
-
- do_IRQ(irq + ar7_irq_base);
-
- return IRQ_HANDLED;
-}
-
-static irqreturn_t ar7_secondary_cascade(int interrupt, void *dev)
-{
- int irq = 0, i;
- unsigned long status;
-
- status = REG(SEC_SR_OFFSET);
- if (unlikely(!status)) {
- spurious_interrupt();
- return IRQ_NONE;
+ u32 status;
+ int i, irq;
+
+ /* Primary IRQ's */
+ irq = readl(REG(PIR_OFFSET)) & 0x3f;
+ if (irq) {
+ do_IRQ(ar7_irq_base + irq);
+ return;
}
- for (i = 0; i < 32; i++)
- if (status & (i << 1)) {
- irq = i + 40;
- REG(SEC_CR_OFFSET) = 1 << i;
- break;
+ /* Secondary IRQ's are cascaded through primary '0' */
+ writel(1, REG(CR_OFFSET(irq)));
+ status = readl(REG(SEC_SR_OFFSET));
+ for (i = 0; i < 32; i++) {
+ if (status & 1) {
+ do_IRQ(ar7_irq_base + i + 40);
+ return;
}
+ status >>= 1;
+ }
- do_IRQ(irq + ar7_irq_base);
-
- return IRQ_HANDLED;
+ spurious_interrupt();
}
asmlinkage void plat_irq_dispatch(void)
{
- unsigned int pending = read_c0_status() & read_c0_cause();
+ unsigned int pending = read_c0_status() & read_c0_cause() & ST0_IM;
if (pending & STATUSF_IP7) /* cpu timer */
do_IRQ(7);
else if (pending & STATUSF_IP2) /* int0 hardware line */
- do_IRQ(2);
- else
+ ar7_cascade();
+ else
spurious_interrupt();
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-29 02:13:19 +0000