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>

1 files changed, 40 insertions, 3 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: