target/linux/atheros-2.6/files/arch/mips/atheros/irq.c

   1 /*
   2  * This file is subject to the terms and conditions of the GNU General Public
   3  * License.  See the file "COPYING" in the main directory of this archive
   4  * for more details.
   5  *
   6  * Copyright (C) 2003 Atheros Communications, Inc.,  All Rights Reserved.
   7  * Copyright (C) 2006 FON Technology, SL.
   8  * Copyright (C) 2006 Imre Kaloz <kaloz@openwrt.org>
   9  * Copyright (C) 2006 Felix Fietkau <nbd@openwrt.org>
  10  */
  11
  12 /*
  13  * Interrupt support for AR531X WiSOC.
  14  */
  15
  16 #include <linux/autoconf.h>
  17 #include <linux/init.h>
  18 #include <linux/kernel_stat.h>
  19 #include <linux/signal.h>
  20 #include <linux/sched.h>
  21 #include <linux/interrupt.h>
  22 #include <linux/slab.h>
  23 #include <linux/random.h>
  24 #include <linux/pm.h>
  25 #include <linux/delay.h>
  26 #include <linux/reboot.h>
  27 #include <linux/irq.h>
  28 #include <asm/bootinfo.h>
  29 #include <asm/mipsregs.h>
  30 #include <asm/irq_cpu.h>
  31 #include "ar531x.h"
  32
  33
  34 /* ARGSUSED */
  35 irqreturn_t
  36 spurious_irq_handler(int cpl, void *dev_id)
  37 {
  38     /*
  39     printk("spurious_irq_handler: %d  cause=0x%8.8x  status=0x%8.8x\n",
  40            cpl, cause_intrs, status_intrs);
  41     */
  42         return IRQ_NONE;
  43 }
  44
  45 /* ARGSUSED */
  46 irqreturn_t
  47 spurious_misc_handler(int cpl, void *dev_id)
  48 {
  49     /*
  50     printk("spurious_misc_handler: 0x%x isr=0x%8.8x imr=0x%8.8x\n",
  51            cpl, ar531x_isr, ar531x_imr);
  52     */
  53         return IRQ_NONE;
  54 }
  55
  56 static struct irqaction spurious_irq  = {
  57         .handler        = spurious_irq_handler,
  58         .flags          = SA_INTERRUPT,
  59         .name           = "spurious_irq",
  60 };
  61
  62 static struct irqaction spurious_misc  = {
  63         .handler        = spurious_misc_handler,
  64         .flags          = SA_INTERRUPT,
  65         .name           = "spurious_misc",
  66 };
  67
  68 asmlinkage void plat_irq_dispatch(void)
  69 {
  70         DO_AR5312(ar5312_irq_dispatch();)
  71         DO_AR5315(ar5315_irq_dispatch();)
  72 }
  73
  74 void __init arch_init_irq(void)
  75 {
  76         clear_c0_status(ST0_IM);
  77         mips_cpu_irq_init();
  78
  79         /* Initialize interrupt controllers */
  80         DO_AR5312(ar5312_misc_intr_init(AR531X_MISC_IRQ_BASE);)
  81         DO_AR5315(ar5315_misc_intr_init(AR531X_MISC_IRQ_BASE);)
  82
  83         /* Default "spurious interrupt" handlers */
  84         setup_irq(AR531X_IRQ_NONE, &spurious_irq);
  85         setup_irq(AR531X_MISC_IRQ_NONE, &spurious_misc);
  86 }