[MIPS] Make I8259A_IRQ_BASE customizable

Move I8259A_IRQ_BASE from asm/i8259.h to asm/mach-generic/irq.h and
make it really customizable.  And remove I8259_IRQ_BASE declared on
some platforms.  Currently only NEC_CMBVR4133 is using custom
I8259A_IRQ_BASE value.

Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

1 files changed, 2 insertions, 51 deletions

diff --git a/arch/mips/vr41xx/nec-cmbvr4133/irq.c b/arch/mips/vr41xx/nec-cmbvr4133/irq.c
index 128ed8d..7d2d076 100644
--- a/arch/mips/vr41xx/nec-cmbvr4133/irq.c
+++ b/arch/mips/vr41xx/nec-cmbvr4133/irq.c
@@ -21,60 +21,16 @@
 #include <linux/interrupt.h>
 
 #include <asm/io.h>
+#include <asm/i8259.h>
 #include <asm/vr41xx/cmbvr4133.h>
 
-extern void enable_8259A_irq(unsigned int irq);
-extern void disable_8259A_irq(unsigned int irq);
-extern void mask_and_ack_8259A(unsigned int irq);
-extern void init_8259A(int hoge);
-
 extern int vr4133_rockhopper;
 
-static void enable_i8259_irq(unsigned int irq)
-{
-	enable_8259A_irq(irq - I8259_IRQ_BASE);
-}
-
-static void disable_i8259_irq(unsigned int irq)
-{
-	disable_8259A_irq(irq - I8259_IRQ_BASE);
-}
-
-static void ack_i8259_irq(unsigned int irq)
-{
-	mask_and_ack_8259A(irq - I8259_IRQ_BASE);
-}
-
-static struct irq_chip i8259_irq_type = {
-	.typename       = "XT-PIC",
-	.ack            = ack_i8259_irq,
-	.mask		= disable_i8259_irq,
-	.mask_ack	= ack_i8259_irq,
-	.unmask		= enable_i8259_irq,
-};
-
 static int i8259_get_irq_number(int irq)
 {
-	unsigned long isr;
-
-	isr = inb(0x20);
-	irq = ffz(~isr);
-	if (irq == 2) {
-		isr = inb(0xa0);
-		irq = 8 + ffz(~isr);
-	}
-
-	if (irq < 0 || irq > 15)
-		return -EINVAL;
-
-	return I8259_IRQ_BASE + irq;
+	return i8259_irq();
 }
 
-static struct irqaction i8259_slave_cascade = {
-	.handler        = &no_action,
-	.name           = "cascade",
-};
-
 void __init rockhopper_init_irq(void)
 {
 	int i;
@@ -84,11 +40,6 @@ void __init rockhopper_init_irq(void)
 		return;
 	}
 
-	for (i = I8259_IRQ_BASE; i <= I8259_IRQ_LAST; i++)
-		set_irq_chip_and_handler(i, &i8259_irq_type, handle_level_irq);
-
-	setup_irq(I8259_SLAVE_IRQ, &i8259_slave_cascade);
-
 	vr41xx_set_irq_trigger(CMBVR41XX_INTC_PIN, TRIGGER_LEVEL, SIGNAL_THROUGH);
 	vr41xx_set_irq_level(CMBVR41XX_INTC_PIN, LEVEL_HIGH);
 	vr41xx_cascade_irq(CMBVR41XX_INTC_IRQ, i8259_get_irq_number);