sh: intc - irl mode update for sh7780 and sh7785

This patch contains the following fixes and improvements:
- Fix address typo for INTMSK2 / INTMSKCLR2 registers on sh7780.
- Adds IRQ_MODE_IRLnnnn_MASK using intc controller for IRL masking.
- Good old IRQ_MODE_IRLnnnn should not register any intc controller.
- plat_irq_setup_pins() now selects IRL or IRQ mode.
- the holding function is now disabled using ICR0.

By default all external pin interrupts are disabled.

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

3 files changed, 85 insertions, 4 deletions

diff --git a/arch/sh/kernel/cpu/sh4a/setup-sh7780.c b/arch/sh/kernel/cpu/sh4a/setup-sh7780.c
index d84c4575fc0a..e8fd33ff0605 100644
--- a/arch/sh/kernel/cpu/sh4a/setup-sh7780.c
+++ b/arch/sh/kernel/cpu/sh4a/setup-sh7780.c
@@ -10,6 +10,7 @@
 #include <linux/platform_device.h>
 #include <linux/init.h>
 #include <linux/serial.h>
+#include <linux/io.h>
 #include <asm/sci.h>
 
 static struct resource rtc_resources[] = {
@@ -239,7 +240,7 @@ static struct intc_vect irl_vectors[] __initdata = {
 };
 
 static struct intc_mask_reg irl3210_mask_registers[] __initdata = {
-	{ 0xffd00080, 0xffd00084, 32, /* INTMSK2 / INTMSKCLR2 */
+	{ 0xffd40080, 0xffd40084, 32, /* INTMSK2 / INTMSKCLR2 */
 	  { IRL_LLLL, IRL_LLLH, IRL_LLHL, IRL_LLHH,
 	    IRL_LHLL, IRL_LHLH, IRL_LHHL, IRL_LHHH,
 	    IRL_HLLL, IRL_HLLH, IRL_HLHL, IRL_HLHH,
@@ -247,7 +248,7 @@ static struct intc_mask_reg irl3210_mask_registers[] __initdata = {
 };
 
 static struct intc_mask_reg irl7654_mask_registers[] __initdata = {
-	{ 0xffd00080, 0xffd00084, 32, /* INTMSK2 / INTMSKCLR2 */
+	{ 0xffd40080, 0xffd40084, 32, /* INTMSK2 / INTMSKCLR2 */
 	  { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
 	    IRL_LLLL, IRL_LLLH, IRL_LLHL, IRL_LLHH,
 	    IRL_LHLL, IRL_LHLH, IRL_LHHL, IRL_LHHH,
@@ -261,8 +262,28 @@ static DECLARE_INTC_DESC(intc_irl7654_desc, "sh7780-irl7654", irl_vectors,
 static DECLARE_INTC_DESC(intc_irl3210_desc, "sh7780-irl3210", irl_vectors,
 			 NULL, NULL, irl3210_mask_registers, NULL, NULL);
 
+#define INTC_ICR0	0xffd00000
+#define INTC_INTMSK0	0xffd00044
+#define INTC_INTMSK1	0xffd00048
+#define INTC_INTMSK2	0xffd40080
+#define INTC_INTMSKCLR1	0xffd00068
+#define INTC_INTMSKCLR2	0xffd40084
+
 void __init plat_irq_setup(void)
 {
+	/* disable IRQ7-0 */
+	ctrl_outl(0xff000000, INTC_INTMSK0);
+
+	/* disable IRL3-0 + IRL7-4 */
+	ctrl_outl(0xc0000000, INTC_INTMSK1);
+	ctrl_outl(0xfffefffe, INTC_INTMSK2);
+
+	/* select IRL mode for IRL3-0 + IRL7-4 */
+	ctrl_outl(ctrl_inl(INTC_ICR0) & ~0x00c00000, INTC_ICR0);
+
+	/* disable holding function, ie enable "SH-4 Mode" */
+	ctrl_outl(ctrl_inl(INTC_ICR0) | 0x00200000, INTC_ICR0);
+
 	register_intc_controller(&intc_desc);
 }
 
@@ -270,12 +291,28 @@ void __init plat_irq_setup_pins(int mode)
 {
 	switch (mode) {
 	case IRQ_MODE_IRQ:
+		/* select IRQ mode for IRL3-0 + IRL7-4 */
+		ctrl_outl(ctrl_inl(INTC_ICR0) | 0x00c00000, INTC_ICR0);
 		register_intc_controller(&intc_irq_desc);
 		break;
 	case IRQ_MODE_IRL7654:
-		register_intc_controller(&intc_irl7654_desc);
+		/* enable IRL7-4 but don't provide any masking */
+		ctrl_outl(0x40000000, INTC_INTMSKCLR1);
+		ctrl_outl(0x0000fffe, INTC_INTMSKCLR2);
 		break;
 	case IRQ_MODE_IRL3210:
+		/* enable IRL0-3 but don't provide any masking */
+		ctrl_outl(0x80000000, INTC_INTMSKCLR1);
+		ctrl_outl(0xfffe0000, INTC_INTMSKCLR2);
+		break;
+	case IRQ_MODE_IRL7654_MASK:
+		/* enable IRL7-4 and mask using cpu intc controller */
+		ctrl_outl(0x40000000, INTC_INTMSKCLR1);
+		register_intc_controller(&intc_irl7654_desc);
+		break;
+	case IRQ_MODE_IRL3210_MASK:
+		/* enable IRL0-3 and mask using cpu intc controller */
+		ctrl_outl(0x80000000, INTC_INTMSKCLR1);
 		register_intc_controller(&intc_irl3210_desc);
 		break;
 	default:
diff --git a/arch/sh/kernel/cpu/sh4a/setup-sh7785.c b/arch/sh/kernel/cpu/sh4a/setup-sh7785.c
index a595203f74c6..486dabe4d272 100644
--- a/arch/sh/kernel/cpu/sh4a/setup-sh7785.c
+++ b/arch/sh/kernel/cpu/sh4a/setup-sh7785.c
@@ -10,6 +10,7 @@
 #include <linux/platform_device.h>
 #include <linux/init.h>
 #include <linux/serial.h>
+#include <linux/io.h>
 #include <asm/sci.h>
 
 static struct plat_sci_port sci_platform_data[] = {
@@ -282,24 +283,66 @@ static DECLARE_INTC_DESC(intc_desc_irl0123, "sh7785-irl0123", vectors_irl0123,
 static DECLARE_INTC_DESC(intc_desc_irl4567, "sh7785-irl4567", vectors_irl4567,
 			 NULL, NULL, mask_registers, NULL, NULL);
 
+#define INTC_ICR0	0xffd00000
+#define INTC_INTMSK0	0xffd00044
+#define INTC_INTMSK1	0xffd00048
+#define INTC_INTMSK2	0xffd40080
+#define INTC_INTMSKCLR1	0xffd00068
+#define INTC_INTMSKCLR2	0xffd40084
+
 void __init plat_irq_setup(void)
 {
+	/* disable IRQ3-0 + IRQ7-4 */
+	ctrl_outl(0xff000000, INTC_INTMSK0);
+
+	/* disable IRL3-0 + IRL7-4 */
+	ctrl_outl(0xc0000000, INTC_INTMSK1);
+	ctrl_outl(0xfffefffe, INTC_INTMSK2);
+
+	/* select IRL mode for IRL3-0 + IRL7-4 */
+	ctrl_outl(ctrl_inl(INTC_ICR0) & ~0x00c00000, INTC_ICR0);
+
+	/* disable holding function, ie enable "SH-4 Mode" */
+	ctrl_outl(ctrl_inl(INTC_ICR0) | 0x00200000, INTC_ICR0);
+
 	register_intc_controller(&intc_desc);
 }
 
 void __init plat_irq_setup_pins(int mode)
 {
+	ctrl_outl(0xc0000000, INTC_INTMSKCLR1);
+	ctrl_outl(0xfffefffe, INTC_INTMSKCLR2);
+	return;
+
 	switch (mode) {
 	case IRQ_MODE_IRQ7654:
+		/* select IRQ mode for IRL7-4 */
+		ctrl_outl(ctrl_inl(INTC_ICR0) | 0x00400000, INTC_ICR0);
 		register_intc_controller(&intc_desc_irq4567);
 		break;
 	case IRQ_MODE_IRQ3210:
+		/* select IRQ mode for IRL3-0 */
+		ctrl_outl(ctrl_inl(INTC_ICR0) | 0x00800000, INTC_ICR0);
 		register_intc_controller(&intc_desc_irq0123);
 		break;
 	case IRQ_MODE_IRL7654:
-		register_intc_controller(&intc_desc_irl4567);
+		/* enable IRL7-4 but don't provide any masking */
+		ctrl_outl(0x40000000, INTC_INTMSKCLR1);
+		ctrl_outl(0x0000fffe, INTC_INTMSKCLR2);
 		break;
 	case IRQ_MODE_IRL3210:
+		/* enable IRL0-3 but don't provide any masking */
+		ctrl_outl(0x80000000, INTC_INTMSKCLR1);
+		ctrl_outl(0xfffe0000, INTC_INTMSKCLR2);
+		break;
+	case IRQ_MODE_IRL7654_MASK:
+		/* enable IRL7-4 and mask using cpu intc controller */
+		ctrl_outl(0x40000000, INTC_INTMSKCLR1);
+		register_intc_controller(&intc_desc_irl4567);
+		break;
+	case IRQ_MODE_IRL3210_MASK:
+		/* enable IRL0-3 and mask using cpu intc controller */
+		ctrl_outl(0x80000000, INTC_INTMSKCLR1);
 		register_intc_controller(&intc_desc_irl0123);
 		break;
 	default:
diff --git a/include/asm-sh/hw_irq.h b/include/asm-sh/hw_irq.h
index f9c90670e147..96d971040503 100644
--- a/include/asm-sh/hw_irq.h
+++ b/include/asm-sh/hw_irq.h
@@ -95,6 +95,7 @@ int intc_set_priority(unsigned int irq, unsigned int prio);
 void __init plat_irq_setup(void);
 
 enum { IRQ_MODE_IRQ, IRQ_MODE_IRQ7654, IRQ_MODE_IRQ3210,
+       IRQ_MODE_IRL7654_MASK, IRQ_MODE_IRL3210_MASK,
        IRQ_MODE_IRL7654, IRQ_MODE_IRL3210 };
 void __init plat_irq_setup_pins(int mode);