From 5c32faad432e74f9ccb7a6d0632492fe2dba5aab Mon Sep 17 00:00:00 2001
From: Michael Sevakis <jethead71@rockbox.org>
Date: Sun, 3 Jun 2007 14:31:42 +0000
Subject: e200: Finally use GPIO IRQs for the buttons...it's IRQ enable bit 33
 afterall and verified independently. There shouldn't now be a need to add
 tick tasks to monitor GPIO level status in other code.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@13538 a1c6a512-1295-4272-9138-f99709370657
---
 firmware/export/pp5024.h                           |  4 +--
 .../target/arm/sandisk/sansa-e200/button-e200.c    | 42 +++++++++-------------
 firmware/target/arm/system-pp502x.c                | 11 +++---
 3 files changed, 25 insertions(+), 32 deletions(-)

diff --git a/firmware/export/pp5024.h b/firmware/export/pp5024.h
index b9238ae98d..59c003613b 100644
--- a/firmware/export/pp5024.h
+++ b/firmware/export/pp5024.h
@@ -20,11 +20,11 @@
  ****************************************************************************/
 
 /* We believe is this quite similar to the 5020 and for how we just use that
-   completely */
+   completely and redifine any minor differences */
 #include "pp5020.h"
 
 #undef GPIO_IRQ
-#define GPIO_IRQ    (32+6)
+#define GPIO_IRQ    (32+1)
 
 #undef GPIO_MASK
 #define GPIO_MASK   (1 << (GPIO_IRQ-32))
diff --git a/firmware/target/arm/sandisk/sansa-e200/button-e200.c b/firmware/target/arm/sandisk/sansa-e200/button-e200.c
index 56bce816e4..f1d5981a18 100644
--- a/firmware/target/arm/sandisk/sansa-e200/button-e200.c
+++ b/firmware/target/arm/sandisk/sansa-e200/button-e200.c
@@ -39,6 +39,9 @@ static unsigned long next_backlight_on = 0;
 /* Buttons */
 static bool hold_button     = false;
 static bool hold_button_old = false;
+#define _button_hold() hold_button
+#else
+#define _button_hold() ((GPIOF_INPUT_VAL & 0x80) != 0)
 #endif /* BOOTLOADER */
 static int  int_btn         = BUTTON_NONE;
 
@@ -47,22 +50,19 @@ void button_init_device(void)
     /* Enable all buttons */
     GPIOF_OUTPUT_EN &= ~0xff;
     GPIOF_ENABLE |= 0xff;
-    
+
     /* Scrollwheel light - enable control through GPIOG pin 7 and set timeout */
     GPIOG_OUTPUT_EN |= 0x80;
     GPIOG_ENABLE = 0x80;
 
 #ifndef BOOTLOADER
+    /* Get current tick before enabling button interrupts */
+    last_wheel_tick = current_tick;
+    last_wheel_post = current_tick;
+
     GPIOH_ENABLE |= 0xc0;
     GPIOH_OUTPUT_EN &= ~0xc0;
 
-#if 0
-    CPU_INT_PRIORITY &= ~HI_MASK;
-    CPU_HI_INT_PRIORITY &= ~GPIO_MASK;
-
-    CPU_INT_CLR = HI_MASK;
-    CPU_HI_INT_CLR = GPIO_MASK;
-#endif
     GPIOF_INT_CLR = 0xff;
     GPIOH_INT_CLR = 0xc0;
 
@@ -75,25 +75,18 @@ void button_init_device(void)
     old_wheel_value = GPIOH_INPUT_VAL & 0xc0;
     GPIOH_INT_LEV = (GPIOH_INT_LEV & ~0xc0) | (old_wheel_value ^ 0xc0);
 
+    /* Enable button interrupts */
     GPIOF_INT_EN = 0xff;
     GPIOH_INT_EN = 0xc0;
-#if 0
-    CPU_HI_INT_EN = GPIO_MASK;
-    CPU_INT_EN = HI_MASK;
-#endif
 
-    last_wheel_tick = current_tick;
-    last_wheel_post = current_tick;
+    CPU_INT_EN = HI_MASK;
+    CPU_HI_INT_EN = GPIO_MASK;
 #endif /* BOOTLOADER */
 }
 
 bool button_hold(void)
 {
-#ifdef BOOTLOADER
-    return (GPIOF_INPUT_VAL & 0x80) != 0;
-#else
-    return hold_button;
-#endif /* BOOTLOADER */
+    return _button_hold();
 }
 
 /* clickwheel */
@@ -118,10 +111,9 @@ void clickwheel_int(void)
 
     unsigned int wheel_value;
 
-    GPIOH_INT_CLR = GPIOH_INT_STAT & 0xc0;
-
     wheel_value = GPIOH_INPUT_VAL & 0xc0;
     GPIOH_INT_LEV = (GPIOH_INT_LEV & ~0xc0) | (wheel_value ^ 0xc0);
+    GPIOH_INT_CLR = GPIOH_INT_STAT & 0xc0;
 
     if (!hold_button)
     {
@@ -202,15 +194,13 @@ void button_int(void)
     state = GPIOF_INPUT_VAL & 0xff;
 
 #ifndef BOOTLOADER
-    GPIOF_INT_CLR = GPIOF_INT_STAT;
     GPIOF_INT_LEV = (GPIOF_INT_LEV & ~0xff) | (state ^ 0xff);
+    GPIOF_INT_CLR = GPIOF_INT_STAT;
 
     hold_button = (state & 0x80) != 0;
+#endif
 
-    if (!hold_button)
-#else
-    if (button_hold())
-#endif /* BOOTLOADER */
+    if (!_button_hold())
     {
         /* Read normal buttons */
         if ((state & 0x01) == 0) int_btn |= BUTTON_REC;
diff --git a/firmware/target/arm/system-pp502x.c b/firmware/target/arm/system-pp502x.c
index a03d479444..2b6a801128 100644
--- a/firmware/target/arm/system-pp502x.c
+++ b/firmware/target/arm/system-pp502x.c
@@ -63,16 +63,19 @@ void irq(void)
 {
     if(CURRENT_CORE == CPU) {
         if (CPU_INT_STAT & TIMER1_MASK) {
+            TIMER1();
+        }
+        else if (CPU_INT_STAT & TIMER2_MASK)
+            TIMER2();
 #ifdef SANSA_E200
+        else if (CPU_HI_INT_STAT & GPIO_MASK)
+        {
             if (GPIOF_INT_STAT & 0xff)
                 button_int();
             if (GPIOH_INT_STAT & 0xc0)
                 clickwheel_int();
-#endif
-            TIMER1();
         }
-        else if (CPU_INT_STAT & TIMER2_MASK)
-            TIMER2();
+#endif
     } else {
         if (COP_INT_STAT & TIMER1_MASK)
             TIMER1();
-- 
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