mirror of
git://projects.qi-hardware.com/openwrt-xburst.git
synced 2024-11-24 02:34:06 +02:00
AR7: IRQ handlng cleanup
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@8743 3c298f89-4303-0410-b956-a3cf2f4a3e73
This commit is contained in:
ejka
parent
35881dd173
commit
2850c28229
@ -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;
|
||||
u32 status;
|
||||
int i, 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;
|
||||
/* 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();
|
||||
}
|
||||
|
||||
Loading…
Reference in New Issue
Block a user