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authorLinus Torvalds <torvalds@woody.linux-foundation.org>2007-02-19 13:18:39 -0800
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-02-19 13:18:39 -0800
commit59b8175c771040afcd4ad67022b0cc80c216b866 (patch)
tree4ef5935bee1e342716d49b9d4b99e3fa835526e6 /arch/arm/mach-ns9xxx/irq.c
parent920841d8d1d61bc12b43f95a579a5374f6d98f81 (diff)
parent3b0eb4a195a124567cd0dd6f700f8388def542c6 (diff)
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Merge branch 'for-linus' of master.kernel.org:/home/rmk/linux-2.6-arm
* 'for-linus' of master.kernel.org:/home/rmk/linux-2.6-arm: (117 commits) [ARM] 4058/2: iop32x: set ->broken_parity_status on n2100 onboard r8169 ports [ARM] 4140/1: AACI stability add ac97 timeout and retries [ARM] 4139/1: AACI record support [ARM] 4138/1: AACI: multiple channel support for IRQ handling [ARM] 4211/1: Provide a defconfig for ns9xxx [ARM] 4210/1: base for new machine type "NetSilicon NS9360" [ARM] 4222/1: S3C2443: Remove reference to missing S3C2443_PM [ARM] 4221/1: S3C2443: DMA support [ARM] 4220/1: S3C24XX: DMA system initialised from sysdev [ARM] 4219/1: S3C2443: DMA source definitions [ARM] 4218/1: S3C2412: fix CONFIG_CPU_S3C2412_ONLY wrt to S3C2443 [ARM] 4217/1: S3C24XX: remove the dma channel show at startup [ARM] 4090/2: avoid clash between PXA and SA1111 defines [ARM] 4216/1: add .gitignore entries for ARM specific files [ARM] 4214/2: S3C2410: Add Armzone QT2410 [ARM] 4215/1: s3c2410 usb device: per-platform vbus_draw [ARM] 4213/1: S3C2410 - Update definition of ADCTSC_XY_PST [ARM] 4098/1: ARM: rtc_lock only used with rtc_cmos [ARM] 4137/1: Add kexec support [ARM] 4201/1: SMP barriers pair needed for the secondary boot process ... Fix up conflict due to typedef removal in sound/arm/aaci.h
Diffstat (limited to 'arch/arm/mach-ns9xxx/irq.c')
-rw-r--r--arch/arm/mach-ns9xxx/irq.c94
1 files changed, 94 insertions, 0 deletions
diff --git a/arch/arm/mach-ns9xxx/irq.c b/arch/arm/mach-ns9xxx/irq.c
new file mode 100644
index 000000000000..83d92724a971
--- /dev/null
+++ b/arch/arm/mach-ns9xxx/irq.c
@@ -0,0 +1,94 @@
+/*
+ * arch/arm/mach-ns9xxx/irq.c
+ *
+ * Copyright (C) 2006,2007 by Digi International Inc.
+ * All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published by
+ * the Free Software Foundation.
+ */
+#include <linux/interrupt.h>
+#include <asm/mach/irq.h>
+#include <asm/mach-types.h>
+#include <asm/arch-ns9xxx/regs-sys.h>
+#include <asm/arch-ns9xxx/irqs.h>
+#include <asm/arch-ns9xxx/board.h>
+
+#include "generic.h"
+
+static void ns9xxx_ack_irq_timer(unsigned int irq)
+{
+ u32 tc = SYS_TC(irq - IRQ_TIMER0);
+
+ REGSET(tc, SYS_TCx, INTC, SET);
+ SYS_TC(irq - IRQ_TIMER0) = tc;
+
+ REGSET(tc, SYS_TCx, INTC, UNSET);
+ SYS_TC(irq - IRQ_TIMER0) = tc;
+}
+
+void (*ns9xxx_ack_irq_functions[NR_IRQS])(unsigned int) = {
+ [IRQ_TIMER0] = ns9xxx_ack_irq_timer,
+ [IRQ_TIMER1] = ns9xxx_ack_irq_timer,
+ [IRQ_TIMER2] = ns9xxx_ack_irq_timer,
+ [IRQ_TIMER3] = ns9xxx_ack_irq_timer,
+};
+
+static void ns9xxx_mask_irq(unsigned int irq)
+{
+ /* XXX: better use cpp symbols */
+ SYS_IC(irq / 4) &= ~(1 << (7 + 8 * (3 - (irq & 3))));
+}
+
+static void ns9xxx_ack_irq(unsigned int irq)
+{
+ if (!ns9xxx_ack_irq_functions[irq]) {
+ printk(KERN_ERR "no ack function for irq %u\n", irq);
+ BUG();
+ }
+
+ ns9xxx_ack_irq_functions[irq](irq);
+ SYS_ISRADDR = 0;
+}
+
+static void ns9xxx_maskack_irq(unsigned int irq)
+{
+ ns9xxx_mask_irq(irq);
+ ns9xxx_ack_irq(irq);
+}
+
+static void ns9xxx_unmask_irq(unsigned int irq)
+{
+ /* XXX: better use cpp symbols */
+ SYS_IC(irq / 4) |= 1 << (7 + 8 * (3 - (irq & 3)));
+}
+
+static struct irq_chip ns9xxx_chip = {
+ .ack = ns9xxx_ack_irq,
+ .mask = ns9xxx_mask_irq,
+ .mask_ack = ns9xxx_maskack_irq,
+ .unmask = ns9xxx_unmask_irq,
+};
+
+void __init ns9xxx_init_irq(void)
+{
+ int i;
+
+ /* disable all IRQs */
+ for (i = 0; i < 8; ++i)
+ SYS_IC(i) = (4 * i) << 24 | (4 * i + 1) << 16 |
+ (4 * i + 2) << 8 | (4 * i + 3);
+
+ /* simple interrupt prio table:
+ * prio(x) < prio(y) <=> x < y
+ */
+ for (i = 0; i < 32; ++i)
+ SYS_IVA(i) = i;
+
+ for (i = IRQ_WATCHDOG; i <= IRQ_EXT3; ++i) {
+ set_irq_chip(i, &ns9xxx_chip);
+ set_irq_handler(i, handle_level_irq);
+ set_irq_flags(i, IRQF_VALID);
+ }
+}