mirror of
git://projects.qi-hardware.com/openwrt-xburst.git
synced 2025-04-21 12:27:27 +03:00
strip the kernel version suffix from target directories, except for brcm-2.4 (the -2.4 will be included in the board name here). CONFIG_LINUX_<ver>_<board> becomes CONFIG_TARGET_<board>, same for profiles.
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@8653 3c298f89-4303-0410-b956-a3cf2f4a3e73
This commit is contained in:
nbd
258
target/linux/brcm63xx/files/arch/mips/bcm963xx/irq.c
Normal file
258
target/linux/brcm63xx/files/arch/mips/bcm963xx/irq.c
Normal file
@@ -0,0 +1,258 @@
|
||||
/*
|
||||
<:copyright-gpl
|
||||
Copyright 2002 Broadcom Corp. All Rights Reserved.
|
||||
|
||||
This program is free software; you can distribute it and/or modify it
|
||||
under the terms of the GNU General Public License (Version 2) as
|
||||
published by the Free Software Foundation.
|
||||
|
||||
This program is distributed in the hope 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.,
|
||||
59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
|
||||
:>
|
||||
*/
|
||||
/*
|
||||
* Interrupt control functions for Broadcom 963xx MIPS boards
|
||||
*/
|
||||
|
||||
#include <asm/atomic.h>
|
||||
|
||||
#include <linux/delay.h>
|
||||
#include <linux/init.h>
|
||||
#include <linux/ioport.h>
|
||||
#include <linux/irq.h>
|
||||
#include <linux/interrupt.h>
|
||||
#include <linux/kernel.h>
|
||||
#include <linux/slab.h>
|
||||
#include <linux/module.h>
|
||||
|
||||
#include <asm/irq.h>
|
||||
#include <asm/mipsregs.h>
|
||||
#include <asm/addrspace.h>
|
||||
#include <asm/signal.h>
|
||||
#include <6348_map_part.h>
|
||||
#include <6348_intr.h>
|
||||
#include <bcm_map_part.h>
|
||||
#include <bcm_intr.h>
|
||||
|
||||
static void irq_dispatch_int(struct pt_regs *regs)
|
||||
{
|
||||
unsigned int pendingIrqs;
|
||||
static unsigned int irqBit;
|
||||
static unsigned int isrNumber = 31;
|
||||
|
||||
pendingIrqs = PERF->IrqStatus & PERF->IrqMask;
|
||||
if (!pendingIrqs) {
|
||||
return;
|
||||
}
|
||||
|
||||
while (1) {
|
||||
irqBit <<= 1;
|
||||
isrNumber++;
|
||||
if (isrNumber == 32) {
|
||||
isrNumber = 0;
|
||||
irqBit = 0x1;
|
||||
}
|
||||
if (pendingIrqs & irqBit) {
|
||||
PERF->IrqMask &= ~irqBit; // mask
|
||||
do_IRQ(isrNumber + INTERNAL_ISR_TABLE_OFFSET);
|
||||
break;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
static void irq_dispatch_ext(uint32 irq)
|
||||
{
|
||||
if (!(PERF->ExtIrqCfg & (1 << (irq - INTERRUPT_ID_EXTERNAL_0 + EI_MASK_SHFT)))) {
|
||||
printk("**** Ext IRQ mask. Should not dispatch ****\n");
|
||||
}
|
||||
/* disable and clear interrupt in the controller */
|
||||
PERF->ExtIrqCfg |= (1 << (irq - INTERRUPT_ID_EXTERNAL_0 + EI_CLEAR_SHFT));
|
||||
PERF->ExtIrqCfg &= ~(1 << (irq - INTERRUPT_ID_EXTERNAL_0 + EI_MASK_SHFT));
|
||||
do_IRQ(irq);
|
||||
}
|
||||
|
||||
|
||||
extern void brcm_timer_interrupt(struct pt_regs *regs);
|
||||
|
||||
asmlinkage void plat_irq_dispatch(struct pt_regs *regs)
|
||||
{
|
||||
u32 cause;
|
||||
while((cause = (read_c0_cause()& CAUSEF_IP))) {
|
||||
if (cause & CAUSEF_IP7)
|
||||
brcm_timer_interrupt(regs);
|
||||
else if (cause & CAUSEF_IP2)
|
||||
irq_dispatch_int(regs);
|
||||
else if (cause & CAUSEF_IP3)
|
||||
irq_dispatch_ext(INTERRUPT_ID_EXTERNAL_0);
|
||||
else if (cause & CAUSEF_IP4)
|
||||
irq_dispatch_ext(INTERRUPT_ID_EXTERNAL_1);
|
||||
else if (cause & CAUSEF_IP5)
|
||||
irq_dispatch_ext(INTERRUPT_ID_EXTERNAL_2);
|
||||
else if (cause & CAUSEF_IP6)
|
||||
irq_dispatch_ext(INTERRUPT_ID_EXTERNAL_3);
|
||||
local_irq_disable();
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
void enable_brcm_irq(unsigned int irq)
|
||||
{
|
||||
unsigned long flags;
|
||||
|
||||
local_irq_save(flags);
|
||||
if( irq >= INTERNAL_ISR_TABLE_OFFSET ) {
|
||||
PERF->IrqMask |= (1 << (irq - INTERNAL_ISR_TABLE_OFFSET));
|
||||
}
|
||||
else if (irq >= INTERRUPT_ID_EXTERNAL_0 && irq <= INTERRUPT_ID_EXTERNAL_3) {
|
||||
/* enable and clear interrupt in the controller */
|
||||
PERF->ExtIrqCfg |= (1 << (irq - INTERRUPT_ID_EXTERNAL_0 + EI_CLEAR_SHFT));
|
||||
PERF->ExtIrqCfg |= (1 << (irq - INTERRUPT_ID_EXTERNAL_0 + EI_MASK_SHFT));
|
||||
}
|
||||
local_irq_restore(flags);
|
||||
}
|
||||
|
||||
void disable_brcm_irq(unsigned int irq)
|
||||
{
|
||||
unsigned long flags;
|
||||
|
||||
local_irq_save(flags);
|
||||
if( irq >= INTERNAL_ISR_TABLE_OFFSET ) {
|
||||
PERF->IrqMask &= ~(1 << (irq - INTERNAL_ISR_TABLE_OFFSET));
|
||||
}
|
||||
else if (irq >= INTERRUPT_ID_EXTERNAL_0 && irq <= INTERRUPT_ID_EXTERNAL_3) {
|
||||
/* disable interrupt in the controller */
|
||||
PERF->ExtIrqCfg &= ~(1 << (irq - INTERRUPT_ID_EXTERNAL_0 + EI_MASK_SHFT));
|
||||
}
|
||||
local_irq_restore(flags);
|
||||
}
|
||||
|
||||
void ack_brcm_irq(unsigned int irq)
|
||||
{
|
||||
/* Already done in brcm_irq_dispatch */
|
||||
}
|
||||
|
||||
unsigned int startup_brcm_irq(unsigned int irq)
|
||||
{
|
||||
enable_brcm_irq(irq);
|
||||
|
||||
return 0; /* never anything pending */
|
||||
}
|
||||
|
||||
unsigned int startup_brcm_none(unsigned int irq)
|
||||
{
|
||||
return 0;
|
||||
}
|
||||
|
||||
void end_brcm_irq(unsigned int irq)
|
||||
{
|
||||
if (!(irq_desc[irq].status & (IRQ_DISABLED|IRQ_INPROGRESS)))
|
||||
enable_brcm_irq(irq);
|
||||
}
|
||||
|
||||
void end_brcm_none(unsigned int irq)
|
||||
{
|
||||
}
|
||||
|
||||
static struct hw_interrupt_type brcm_irq_type = {
|
||||
.typename = "MIPS",
|
||||
.startup = startup_brcm_irq,
|
||||
.shutdown = disable_brcm_irq,
|
||||
.enable = enable_brcm_irq,
|
||||
.disable = disable_brcm_irq,
|
||||
.ack = ack_brcm_irq,
|
||||
.end = end_brcm_irq,
|
||||
.set_affinity = NULL
|
||||
};
|
||||
|
||||
static struct hw_interrupt_type brcm_irq_no_end_type = {
|
||||
.typename = "MIPS",
|
||||
.startup = startup_brcm_none,
|
||||
.shutdown = disable_brcm_irq,
|
||||
.enable = enable_brcm_irq,
|
||||
.disable = disable_brcm_irq,
|
||||
.ack = ack_brcm_irq,
|
||||
.end = end_brcm_none,
|
||||
.set_affinity = NULL
|
||||
};
|
||||
|
||||
void __init arch_init_irq(void)
|
||||
{
|
||||
int i;
|
||||
|
||||
clear_c0_status(ST0_BEV);
|
||||
change_c0_status(ST0_IM, (IE_IRQ0 | IE_IRQ1 | IE_IRQ2 | IE_IRQ3 | IE_IRQ4));
|
||||
|
||||
for (i = 0; i < NR_IRQS; i++) {
|
||||
irq_desc[i].status = IRQ_DISABLED;
|
||||
irq_desc[i].action = 0;
|
||||
irq_desc[i].depth = 1;
|
||||
irq_desc[i].chip = &brcm_irq_type;
|
||||
}
|
||||
}
|
||||
|
||||
int request_external_irq(unsigned int irq,
|
||||
FN_HANDLER handler,
|
||||
unsigned long irqflags,
|
||||
const char * devname,
|
||||
void *dev_id)
|
||||
{
|
||||
unsigned long flags;
|
||||
|
||||
local_irq_save(flags);
|
||||
|
||||
PERF->ExtIrqCfg |= (1 << (irq - INTERRUPT_ID_EXTERNAL_0 + EI_CLEAR_SHFT)); // Clear
|
||||
PERF->ExtIrqCfg &= ~(1 << (irq - INTERRUPT_ID_EXTERNAL_0 + EI_MASK_SHFT)); // Mask
|
||||
PERF->ExtIrqCfg &= ~(1 << (irq - INTERRUPT_ID_EXTERNAL_0 + EI_INSENS_SHFT)); // Edge insesnsitive
|
||||
PERF->ExtIrqCfg |= (1 << (irq - INTERRUPT_ID_EXTERNAL_0 + EI_LEVEL_SHFT)); // Level triggered
|
||||
PERF->ExtIrqCfg &= ~(1 << (irq - INTERRUPT_ID_EXTERNAL_0 + EI_SENSE_SHFT)); // Low level
|
||||
|
||||
local_irq_restore(flags);
|
||||
|
||||
return( request_irq(irq, handler, irqflags, devname, dev_id) );
|
||||
}
|
||||
|
||||
/* VxWorks compatibility function(s). */
|
||||
|
||||
unsigned int BcmHalMapInterrupt(FN_HANDLER pfunc, unsigned int param,
|
||||
unsigned int interruptId)
|
||||
{
|
||||
int nRet = -1;
|
||||
char *devname;
|
||||
|
||||
devname = kmalloc(16, GFP_KERNEL);
|
||||
if (devname)
|
||||
sprintf( devname, "brcm_%d", interruptId );
|
||||
|
||||
/* Set the IRQ description to not automatically enable the interrupt at
|
||||
* the end of an ISR. The driver that handles the interrupt must
|
||||
* explicitly call BcmHalInterruptEnable or enable_brcm_irq. This behavior
|
||||
* is consistent with interrupt handling on VxWorks.
|
||||
*/
|
||||
irq_desc[interruptId].chip = &brcm_irq_no_end_type;
|
||||
|
||||
if( interruptId >= INTERNAL_ISR_TABLE_OFFSET )
|
||||
{
|
||||
printk("BcmHalMapInterrupt : internal IRQ\n");
|
||||
nRet = request_irq( interruptId, pfunc, SA_SAMPLE_RANDOM | SA_INTERRUPT, devname, (void *) param );
|
||||
}
|
||||
else if (interruptId >= INTERRUPT_ID_EXTERNAL_0 && interruptId <= INTERRUPT_ID_EXTERNAL_3)
|
||||
{
|
||||
printk("BcmHalMapInterrupt : external IRQ\n");
|
||||
nRet = request_external_irq( interruptId, pfunc, SA_SAMPLE_RANDOM | SA_INTERRUPT, devname, (void *) param );
|
||||
}
|
||||
|
||||
return( nRet );
|
||||
}
|
||||
|
||||
|
||||
EXPORT_SYMBOL(enable_brcm_irq);
|
||||
EXPORT_SYMBOL(disable_brcm_irq);
|
||||
EXPORT_SYMBOL(request_external_irq);
|
||||
EXPORT_SYMBOL(BcmHalMapInterrupt);
|
||||
|
||||
Reference in New Issue
Block a user