diff options
Diffstat (limited to 'target/linux/easygate-2.6/files/arch/mips/bcm963xx/irq.c')
| -rw-r--r-- | target/linux/easygate-2.6/files/arch/mips/bcm963xx/irq.c | 258 |
1 files changed, 0 insertions, 258 deletions
diff --git a/target/linux/easygate-2.6/files/arch/mips/bcm963xx/irq.c b/target/linux/easygate-2.6/files/arch/mips/bcm963xx/irq.c deleted file mode 100644 index 962cd374d..000000000 --- a/target/linux/easygate-2.6/files/arch/mips/bcm963xx/irq.c +++ /dev/null @@ -1,258 +0,0 @@ -/* -<: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); - |