sh: intc - shared IPR and INTC2 controller

This is the second version of the shared interrupt controller patch
for the sh architecture, fixing up handling of intc_reg_fns[].

The three main advantages with this controller over the existing
ones are:

	- Both priority (ipr) and bitmap (intc2) registers are
	  supported
	- External pin sense configuration is supported, ie edge
	  vs level triggered
	- CPU/Board specific code maps 1:1 with datasheet for
	  easy verification

This controller can easily coexist with the current IPR and INTC2
controllers, but the idea is that CPUs/Boards should be moved over
to this controller over time so we have a single code base to
maintain.

Signed-off-by: Magnus Damm <damm@igel.co.jp>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

1 files changed, 68 insertions, 0 deletions

diff --git a/include/asm-sh/hw_irq.h b/include/asm-sh/hw_irq.h
index 4ca3f765bacc..34ff8c7cfb55 100644
--- a/include/asm-sh/hw_irq.h
+++ b/include/asm-sh/hw_irq.h
@@ -1,6 +1,7 @@
 #ifndef __ASM_SH_HW_IRQ_H
 #define __ASM_SH_HW_IRQ_H
 
+#include <linux/init.h>
 #include <asm/atomic.h>
 
 extern atomic_t irq_err_count;
@@ -47,4 +48,71 @@ void init_IRQ_ipr(void);
  */
 void ipr_irq_enable_irlm(void);
 
+typedef unsigned char intc_enum;
+
+struct intc_vect {
+	intc_enum enum_id;
+	unsigned short vect;
+};
+
+#define INTC_VECT(enum_id, vect) { enum_id, vect }
+
+struct intc_prio {
+	intc_enum enum_id;
+	unsigned char priority;
+};
+
+#define INTC_PRIO(enum_id, prio) { enum_id, prio }
+
+struct intc_group {
+	intc_enum enum_id;
+	intc_enum *enum_ids;
+};
+
+#define INTC_GROUP(enum_id, ids...) { enum_id, (intc_enum []) { ids, 0 } }
+
+struct intc_mask_reg {
+	unsigned long set_reg, clr_reg, reg_width;
+	intc_enum enum_ids[32];
+};
+
+struct intc_prio_reg {
+	unsigned long reg, reg_width, field_width;
+	intc_enum enum_ids[16];
+};
+
+struct intc_sense_reg {
+	unsigned long reg, reg_width, field_width;
+	intc_enum enum_ids[16];
+};
+
+struct intc_desc {
+	struct intc_vect *vectors;
+	unsigned int nr_vectors;
+	struct intc_group *groups;
+	unsigned int nr_groups;
+	struct intc_prio *priorities;
+	unsigned int nr_priorities;
+	struct intc_mask_reg *mask_regs;
+	unsigned int nr_mask_regs;
+	struct intc_prio_reg *prio_regs;
+	unsigned int nr_prio_regs;
+	struct intc_sense_reg *sense_regs;
+	unsigned int nr_sense_regs;
+	struct irq_chip chip;
+};
+
+#define _INTC_ARRAY(a) a, sizeof(a)/sizeof(*a)
+#define DECLARE_INTC_DESC(symbol, chipname, vectors, groups,		\
+	priorities, mask_regs, prio_regs, sense_regs)			\
+static struct intc_desc symbol = {					\
+	_INTC_ARRAY(vectors), _INTC_ARRAY(groups),			\
+	_INTC_ARRAY(priorities),					\
+	_INTC_ARRAY(mask_regs), _INTC_ARRAY(prio_regs),			\
+	_INTC_ARRAY(sense_regs),					\
+	.chip.name = chipname,						\
+}
+
+void __init register_intc_controller(struct intc_desc *desc);
+
 #endif /* __ASM_SH_HW_IRQ_H */