sh: add interrupt ack code to sh4a

This patch is based on interrupt acknowledge code for external
interrupt sources on sh3 processors and adds on sh4a processors.

Signed-off-by: Yoshihiro Shimoda <shimoda.yoshihiro@renesas.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

8 files changed, 76 insertions, 28 deletions

diff --git a/arch/sh/kernel/cpu/irq/intc.c b/arch/sh/kernel/cpu/irq/intc.c
index da5dae787888..8c70e201bde0 100644
--- a/arch/sh/kernel/cpu/irq/intc.c
+++ b/arch/sh/kernel/cpu/irq/intc.c
@@ -62,7 +62,7 @@ struct intc_desc_int {
 #endif
 
 static unsigned int intc_prio_level[NR_IRQS]; /* for now */
-#ifdef CONFIG_CPU_SH3
+#if defined(CONFIG_CPU_SH3) || defined(CONFIG_CPU_SH4A)
 static unsigned long ack_handle[NR_IRQS];
 #endif
 
@@ -231,7 +231,7 @@ static void intc_disable(unsigned int irq)
         }
 }
 
-#ifdef CONFIG_CPU_SH3
+#if defined(CONFIG_CPU_SH3) || defined(CONFIG_CPU_SH4A)
 static void intc_mask_ack(unsigned int irq)
 {
         struct intc_desc_int *d = get_intc_desc(irq);
@@ -244,8 +244,23 @@ static void intc_mask_ack(unsigned int irq)
 
         if (handle) {
                 addr = INTC_REG(d, _INTC_ADDR_D(handle), 0);
-                ctrl_inb(addr);
-                ctrl_outb(0x3f ^ set_field(0, 1, handle), addr);
+                switch (_INTC_FN(handle)) {
+                case REG_FN_MODIFY_BASE + 0:    /* 8bit */
+                        ctrl_inb(addr);
+                        ctrl_outb(0xff ^ set_field(0, 1, handle), addr);
+                        break;
+                case REG_FN_MODIFY_BASE + 1:    /* 16bit */
+                        ctrl_inw(addr);
+                        ctrl_outw(0xffff ^ set_field(0, 1, handle), addr);
+                        break;
+                case REG_FN_MODIFY_BASE + 3:    /* 32bit */
+                        ctrl_inl(addr);
+                        ctrl_outl(0xffffffff ^ set_field(0, 1, handle), addr);
+                        break;
+                default:
+                        BUG();
+                        break;
+                }
         }
 }
 #endif
@@ -466,7 +481,7 @@ static unsigned int __init intc_prio_data(struct intc_desc *desc,
         return 0;
 }
 
-#ifdef CONFIG_CPU_SH3
+#if defined(CONFIG_CPU_SH3) || defined(CONFIG_CPU_SH4A)
 static unsigned int __init intc_ack_data(struct intc_desc *desc,
                                           struct intc_desc_int *d,
                                           intc_enum enum_id)
@@ -601,7 +616,7 @@ static void __init intc_register_irq(struct intc_desc *desc,
         /* irq should be disabled by default */
         d->chip.mask(irq);
 
-#ifdef CONFIG_CPU_SH3
+#if defined(CONFIG_CPU_SH3) || defined(CONFIG_CPU_SH4A)
         if (desc->ack_regs)
                 ack_handle[irq] = intc_ack_data(desc, d, enum_id);
 #endif
@@ -635,7 +650,7 @@ void __init register_intc_controller(struct intc_desc *desc)
         d->nr_reg += desc->prio_regs ? desc->nr_prio_regs * 2 : 0;
         d->nr_reg += desc->sense_regs ? desc->nr_sense_regs : 0;
 
-#ifdef CONFIG_CPU_SH3
+#if defined(CONFIG_CPU_SH3) || defined(CONFIG_CPU_SH4A)
         d->nr_reg += desc->ack_regs ? desc->nr_ack_regs : 0;
 #endif
         d->reg = alloc_bootmem(d->nr_reg * sizeof(*d->reg));
@@ -676,7 +691,7 @@ void __init register_intc_controller(struct intc_desc *desc)
         d->chip.mask_ack = intc_disable;
         d->chip.set_type = intc_set_sense;
 
-#ifdef CONFIG_CPU_SH3
+#if defined(CONFIG_CPU_SH3) || defined(CONFIG_CPU_SH4A)
         if (desc->ack_regs) {
                 for (i = 0; i < desc->nr_ack_regs; i++)
                         k += save_reg(d, k, desc->ack_regs[i].set_reg, 0);
diff --git a/arch/sh/kernel/cpu/sh4a/setup-sh7366.c b/arch/sh/kernel/cpu/sh4a/setup-sh7366.c
index f26b5cdad0d1..f97ea8e0acf5 100644
--- a/arch/sh/kernel/cpu/sh4a/setup-sh7366.c
+++ b/arch/sh/kernel/cpu/sh4a/setup-sh7366.c
@@ -163,8 +163,14 @@ static struct intc_sense_reg sense_registers[] __initdata = {
           { IRQ0, IRQ1, IRQ2, IRQ3, IRQ4, IRQ5, IRQ6, IRQ7 } },
 };
 
-static DECLARE_INTC_DESC(intc_desc, "sh7366", vectors, groups,
-                         mask_registers, prio_registers, sense_registers);
+static struct intc_mask_reg ack_registers[] __initdata = {
+        { 0xa4140024, 0, 8, /* INTREQ00 */
+          { IRQ0, IRQ1, IRQ2, IRQ3, IRQ4, IRQ5, IRQ6, IRQ7 } },
+};
+
+static DECLARE_INTC_DESC_ACK(intc_desc, "sh7366", vectors, groups,
+                             mask_registers, prio_registers, sense_registers,
+                             ack_registers);
 
 void __init plat_irq_setup(void)
 {
diff --git a/arch/sh/kernel/cpu/sh4a/setup-sh7722.c b/arch/sh/kernel/cpu/sh4a/setup-sh7722.c
index 62ebccf18b3c..d8617b669fad 100644
--- a/arch/sh/kernel/cpu/sh4a/setup-sh7722.c
+++ b/arch/sh/kernel/cpu/sh4a/setup-sh7722.c
@@ -229,8 +229,14 @@ static struct intc_sense_reg sense_registers[] __initdata = {
           { IRQ0, IRQ1, IRQ2, IRQ3, IRQ4, IRQ5, IRQ6, IRQ7 } },
 };
 
-static DECLARE_INTC_DESC(intc_desc, "sh7722", vectors, groups,
-                         mask_registers, prio_registers, sense_registers);
+static struct intc_mask_reg ack_registers[] __initdata = {
+        { 0xa4140024, 0, 8, /* INTREQ00 */
+          { IRQ0, IRQ1, IRQ2, IRQ3, IRQ4, IRQ5, IRQ6, IRQ7 } },
+};
+
+static DECLARE_INTC_DESC_ACK(intc_desc, "sh7722", vectors, groups,
+                             mask_registers, prio_registers, sense_registers,
+                             ack_registers);
 
 void __init plat_irq_setup(void)
 {
diff --git a/arch/sh/kernel/cpu/sh4a/setup-sh7723.c b/arch/sh/kernel/cpu/sh4a/setup-sh7723.c
index a0470f2f5479..abd1ca03f39f 100644
--- a/arch/sh/kernel/cpu/sh4a/setup-sh7723.c
+++ b/arch/sh/kernel/cpu/sh4a/setup-sh7723.c
@@ -326,8 +326,14 @@ static struct intc_sense_reg sense_registers[] __initdata = {
           { IRQ0, IRQ1, IRQ2, IRQ3, IRQ4, IRQ5, IRQ6, IRQ7 } },
 };
 
-static DECLARE_INTC_DESC(intc_desc, "sh7723", vectors, groups,
-                         mask_registers, prio_registers, sense_registers);
+static struct intc_mask_reg ack_registers[] __initdata = {
+        { 0xa4140024, 0, 8, /* INTREQ00 */
+          { IRQ0, IRQ1, IRQ2, IRQ3, IRQ4, IRQ5, IRQ6, IRQ7 } },
+};
+
+static DECLARE_INTC_DESC_ACK(intc_desc, "sh7723", vectors, groups,
+                             mask_registers, prio_registers, sense_registers,
+                             ack_registers);
 
 void __init plat_irq_setup(void)
 {
diff --git a/arch/sh/kernel/cpu/sh4a/setup-sh7763.c b/arch/sh/kernel/cpu/sh4a/setup-sh7763.c
index 3b278df8a53b..3c5b629887a8 100644
--- a/arch/sh/kernel/cpu/sh4a/setup-sh7763.c
+++ b/arch/sh/kernel/cpu/sh4a/setup-sh7763.c
@@ -296,9 +296,14 @@ static struct intc_sense_reg irq_sense_registers[] __initdata = {
                                             IRQ4, IRQ5, IRQ6, IRQ7 } },
 };
 
-static DECLARE_INTC_DESC(intc_irq_desc, "sh7763-irq", irq_vectors,
-                        NULL, irq_mask_registers, irq_prio_registers,
-                        irq_sense_registers);
+static struct intc_mask_reg irq_ack_registers[] __initdata = {
+        { 0xffd00024, 0, 32, /* INTREQ */
+          { IRQ0, IRQ1, IRQ2, IRQ3, IRQ4, IRQ5, IRQ6, IRQ7 } },
+};
+
+static DECLARE_INTC_DESC_ACK(intc_irq_desc, "sh7763-irq", irq_vectors,
+                             NULL, irq_mask_registers, irq_prio_registers,
+                             irq_sense_registers, irq_ack_registers);
 
 
 /* External interrupt pins in IRL mode */
diff --git a/arch/sh/kernel/cpu/sh4a/setup-sh7780.c b/arch/sh/kernel/cpu/sh4a/setup-sh7780.c
index 18dbbe23fea1..fb8200cc7440 100644
--- a/arch/sh/kernel/cpu/sh4a/setup-sh7780.c
+++ b/arch/sh/kernel/cpu/sh4a/setup-sh7780.c
@@ -217,9 +217,14 @@ static struct intc_sense_reg irq_sense_registers[] __initdata = {
                                             IRQ4, IRQ5, IRQ6, IRQ7 } },
 };
 
-static DECLARE_INTC_DESC(intc_irq_desc, "sh7780-irq", irq_vectors,
-                         NULL, irq_mask_registers, irq_prio_registers,
-                         irq_sense_registers);
+static struct intc_mask_reg irq_ack_registers[] __initdata = {
+        { 0xffd00024, 0, 32, /* INTREQ */
+          { IRQ0, IRQ1, IRQ2, IRQ3, IRQ4, IRQ5, IRQ6, IRQ7 } },
+};
+
+static DECLARE_INTC_DESC_ACK(intc_irq_desc, "sh7780-irq", irq_vectors,
+                             NULL, irq_mask_registers, irq_prio_registers,
+                             irq_sense_registers, irq_ack_registers);
 
 /* External interrupt pins in IRL mode */
 
diff --git a/arch/sh/kernel/cpu/sh4a/setup-sh7785.c b/arch/sh/kernel/cpu/sh4a/setup-sh7785.c
index 621e7329ec63..30baa63b24c8 100644
--- a/arch/sh/kernel/cpu/sh4a/setup-sh7785.c
+++ b/arch/sh/kernel/cpu/sh4a/setup-sh7785.c
@@ -238,13 +238,18 @@ static struct intc_sense_reg sense_registers[] __initdata = {
                                             IRQ4, IRQ5, IRQ6, IRQ7 } },
 };
 
-static DECLARE_INTC_DESC(intc_desc_irq0123, "sh7785-irq0123", vectors_irq0123,
-                         NULL, mask_registers, prio_registers,
-                         sense_registers);
+static struct intc_mask_reg ack_registers[] __initdata = {
+        { 0xffd00024, 0, 32, /* INTREQ */
+          { IRQ0, IRQ1, IRQ2, IRQ3, IRQ4, IRQ5, IRQ6, IRQ7 } },
+};
+
+static DECLARE_INTC_DESC_ACK(intc_desc_irq0123, "sh7785-irq0123",
+                             vectors_irq0123, NULL, mask_registers,
+                             prio_registers, sense_registers, ack_registers);
 
-static DECLARE_INTC_DESC(intc_desc_irq4567, "sh7785-irq4567", vectors_irq4567,
-                         NULL, mask_registers, prio_registers,
-                         sense_registers);
+static DECLARE_INTC_DESC_ACK(intc_desc_irq4567, "sh7785-irq4567",
+                             vectors_irq4567, NULL, mask_registers,
+                             prio_registers, sense_registers, ack_registers);
 
 /* External interrupt pins in IRL mode */
 
diff --git a/include/asm-sh/hw_irq.h b/include/asm-sh/hw_irq.h
index 7438d1e21bc9..d557b00111bf 100644
--- a/include/asm-sh/hw_irq.h
+++ b/include/asm-sh/hw_irq.h
@@ -79,7 +79,7 @@ struct intc_desc {
         struct intc_sense_reg *sense_regs;
         unsigned int nr_sense_regs;
         char *name;
-#ifdef CONFIG_CPU_SH3
+#if defined(CONFIG_CPU_SH3) || defined(CONFIG_CPU_SH4A)
         struct intc_mask_reg *ack_regs;
         unsigned int nr_ack_regs;
 #endif
@@ -95,7 +95,7 @@ struct intc_desc symbol __initdata = {					\
         chipname,                                                       \
 }
 
-#ifdef CONFIG_CPU_SH3
+#if defined(CONFIG_CPU_SH3) || defined(CONFIG_CPU_SH4A)
 #define DECLARE_INTC_DESC_ACK(symbol, chipname, vectors, groups,        \
         mask_regs, prio_regs, sense_regs, ack_regs)                     \
 struct intc_desc symbol __initdata = {                                  \