davinci: Integrate cp_intc support into low-level irq code

Integrate the Common Platform Interrupt Controller (cp_intc)
support into the low-level irq handling for davinci and similar
platforms.  Do it such that support for cp_intc and the original
aintc can coexist in the same kernel binary.

Signed-off-by: Mark A. Greer <mgreer@mvista.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>

2 files changed, 20 insertions, 0 deletions

diff --git a/arch/arm/mach-davinci/include/mach/common.h b/arch/arm/mach-davinci/include/mach/common.h
index b773d92e7379..22db67744875 100644
--- a/arch/arm/mach-davinci/include/mach/common.h
+++ b/arch/arm/mach-davinci/include/mach/common.h
@@ -18,6 +18,7 @@ extern struct sys_timer davinci_timer;
 
 extern void davinci_irq_init(void);
 extern void __iomem *davinci_intc_base;
+extern int davinci_intc_type;
 
 /* parameters describe VBUS sourcing for host mode */
 extern void setup_usb(unsigned mA, unsigned potpgt_msec);
diff --git a/arch/arm/mach-davinci/include/mach/entry-macro.S b/arch/arm/mach-davinci/include/mach/entry-macro.S
index ed78851fe4ae..fbdebc7cb409 100644
--- a/arch/arm/mach-davinci/include/mach/entry-macro.S
+++ b/arch/arm/mach-davinci/include/mach/entry-macro.S
@@ -23,9 +23,28 @@
                 .endm
 
                 .macro  get_irqnr_and_base, irqnr, irqstat, base, tmp
+#if defined(CONFIG_AINTC) && defined(CONFIG_CP_INTC)
+                ldr \tmp, =davinci_intc_type
+                ldr \tmp, [\tmp]
+                cmp \tmp, #DAVINCI_INTC_TYPE_CP_INTC
+                beq 1001f
+#endif
+#if defined(CONFIG_AINTC)
                 ldr \tmp, [\base, #0x14]
                 movs \tmp, \tmp, lsr #2
                 sub \irqnr, \tmp, #1
+                b 1002f
+#endif
+#if defined(CONFIG_CP_INTC)
+1001:           ldr \irqnr, [\base, #0x80] /* get irq number */
+                and \irqnr, \irqnr, #0xff  /* irq is in bits 0-9 */
+                mov \tmp, \irqnr, lsr #3
+                and \tmp, \tmp, #0xfc
+                add \tmp, \tmp, #0x280 /* get the register offset */
+                ldr \irqstat, [\base, \tmp] /* get the intc status */
+                cmp \irqstat, #0x0
+#endif
+1002:
                 .endm
 
                 .macro  irq_prio_table