Fuzev2: Preliminary button support. Scrollwheel does not work yet.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@25392 a1c6a512-1295-4272-9138-f99709370657

firmware/target/arm/as3525/sansa-fuzev2/button-fuzev2.c

@@ -22,7 +22,15 @@
 #include "config.h"
 #include "system.h"
 #include "button.h"
+#include "backlight.h"
 
+/*
+ * TODO: Scrollwheel!
+ */
+ 
+#ifdef HAS_BUTTON_HOLD
+static bool hold_button = false;
+#endif
 void button_init_device(void)
 {
 }
@@ -30,12 +38,94 @@ void button_init_device(void)
 /*
  * Get button pressed from hardware
  */
+
 int button_read_device(void)
 {
-    return 0;
+    int btn = 0;
+    volatile int delay;
+    static bool hold_button_old = false;
+    static long power_counter = 0;
+    unsigned gpiod = GPIOD_DATA;
+    unsigned gpioa_dir = GPIOA_DIR;
+    unsigned gpiod6;
+    for(delay = 500; delay; delay--) nop;
+    CCU_IO &= ~(1<<12);
+    for(delay=8;delay;delay--) nop;
+    GPIOB_DIR |= 1<<3;
+    GPIOB_PIN(3) = 1<<3;
+    GPIOC_DIR = 0;
+    GPIOB_DIR &= ~(1<<1);
+    GPIOB_DIR |= 1<<0;
+    GPIOB_PIN(0) = 1;
+    for(delay = 500; delay; delay--)
+        nop;
+    gpiod6 = GPIOD_PIN(6);
+    GPIOB_PIN(0) = 0;
+    for(delay = 240; delay; delay--)
+        nop;
+    GPIOD_DIR = 0xff;
+    GPIOA_DIR &= ~(1<<6|1<<7);
+    GPIOD_DATA = 0;
+    GPIOD_DIR = 0;
+    if (GPIOC_PIN(1) & 1<<1)
+        btn |= BUTTON_DOWN;
+    if (GPIOC_PIN(2) & 1<<2)
+        btn |= BUTTON_UP;
+    if (GPIOC_PIN(3) & 1<<3)
+        btn |= BUTTON_LEFT;
+    if (GPIOC_PIN(4) & 1<<4)
+        btn |= BUTTON_SELECT;
+    if (GPIOC_PIN(5) & 1<<5)
+        btn |= BUTTON_RIGHT;
+    if (GPIOB_PIN(1) & 1<<1)
+        btn |= BUTTON_HOME;
+    if (gpiod6 & 1<<6)
+    {   /* power/hold is on the same pin. we know it's hold if the bit isn't
+         * set now anymore */
+        if (GPIOD_PIN(6) & 1<<6)
+        {
+            hold_button = false;
+            btn |= BUTTON_POWER;
+        }
+        else
+        {
+            hold_button = true;
+        }
+    }
+
+    GPIOD_DIR = 0xff;
+    GPIOD_DATA = gpiod;
+    GPIOA_DIR = gpioa_dir;
+    GPIOD_DIR = 0;
+    CCU_IO |= 1<<12;
+#ifdef HAS_BUTTON_HOLD
+    /* light handling */
+    if (hold_button != hold_button_old)
+    {
+        hold_button_old = hold_button;
+        backlight_hold_changed(hold_button);
+    }
+    if (hold_button)
+    {
+        power_counter = HZ;
+        return 0;
+    }
+    /* read power, but not if hold button was just released, since
+     * you basically always hit power due to the slider mechanism after releasing
+     * (fuze only)
+     */
+    else if (power_counter > 0)
+    {
+        power_counter--;
+        btn &= ~BUTTON_POWER;
+    }
+#endif
+    return btn;
 }
 
+#ifdef HAS_BUTTON_HOLD
 bool button_hold(void)
 {
-    return false;
+    return hold_button;
 }
+#endif