1 files changed, 189 insertions, 0 deletions

diff --git a/firmware/target/arm/ipod/3g/button-3g.c b/firmware/target/arm/ipod/3g/button-3g.c
new file mode 100644
index 0000000000..7244dd597b
--- /dev/null
+++ b/firmware/target/arm/ipod/3g/button-3g.c
@@ -0,0 +1,189 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ *
+ * Copyright (C) 2002 by Daniel Stenberg
+ *
+ * iPod driver based on code from the ipodlinux project - http://ipodlinux.org
+ * Adapted for Rockbox in December 2005
+ * Original file: linux/arch/armnommu/mach-ipod/keyboard.c
+ * Copyright (c) 2003-2005 Bernard Leach (leachbj@bouncycastle.org)
+ *
+ *
+ * All files in this archive are subject to the GNU General Public License.
+ * See the file COPYING in the source tree root for full license agreement.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ****************************************************************************/
+
+/*
+ * Rockbox button functions
+ */
+
+#include <stdlib.h>
+#include "config.h"
+#include "cpu.h"
+#include "system.h"
+#include "button.h"
+#include "kernel.h"
+#include "backlight.h"
+#include "adc.h"
+#include "serial.h"
+#include "power.h"
+#include "system.h"
+#include "powermgmt.h"
+
+/* iPod 3G and mini 1G, mini 2G uses iPod 4G code */
+void handle_scroll_wheel(int new_scroll, int was_hold, int reverse)
+{
+    int wheel_keycode = BUTTON_NONE;
+    static int prev_scroll = -1;
+    static int direction = 0;
+    static int count = 0;
+    static int scroll_state[4][4] = {
+        {0, 1, -1, 0},
+        {-1, 0, 0, 1},
+        {1, 0, 0, -1},
+        {0, -1, 1, 0}
+    };
+
+    if ( prev_scroll == -1 ) {
+        prev_scroll = new_scroll;
+    }
+    else if (direction != scroll_state[prev_scroll][new_scroll]) {
+        direction = scroll_state[prev_scroll][new_scroll];
+        count = 0;
+    }
+    else if (!was_hold) {
+        backlight_on();
+        if (++count == 6) { /* reduce sensitivity */
+            count = 0;
+            switch (direction) {
+                case 1:
+                    if (reverse) {
+                        /* 'r' keypress */
+                        wheel_keycode = BUTTON_SCROLL_FWD;
+                    }
+                    else {
+                        /* 'l' keypress */
+                        wheel_keycode = BUTTON_SCROLL_BACK;
+                    }
+                    break;
+                case -1:
+                    if (reverse) {
+                        /* 'l' keypress */
+                        wheel_keycode = BUTTON_SCROLL_BACK;
+                    }
+                    else {
+                        /* 'r' keypress */
+                        wheel_keycode = BUTTON_SCROLL_FWD;
+                    }
+                    break;
+                default:
+                    /* only happens if we get out of sync */
+                    break;
+            }
+        }
+    }
+    if (wheel_keycode != BUTTON_NONE && queue_empty(&button_queue))
+        queue_post(&button_queue, wheel_keycode, NULL);
+    prev_scroll = new_scroll;
+}
+
+static int ipod_3g_button_read(void)
+{
+    unsigned char source, state;
+    static int was_hold = 0;
+    int btn = BUTTON_NONE;
+    /*
+     * we need some delay for g3, cause hold generates several interrupts,
+     * some of them delayed
+     */
+    udelay(250);
+
+    /* get source of interupts */
+    source = GPIOA_INT_STAT;
+
+
+    /* get current keypad status */
+    state = GPIOA_INPUT_VAL;
+    GPIOA_INT_LEV = ~state;
+
+    if (was_hold && source == 0x40 && state == 0xbf) {
+        /* ack any active interrupts */
+        GPIOA_INT_CLR = source;
+        return BUTTON_NONE;
+    }
+    was_hold = 0;
+
+
+    if ((state & 0x20) == 0) {
+        /* 3g hold switch is active low */
+        was_hold = 1;
+        /* hold switch on 3g causes all outputs to go low */
+        /* we shouldn't interpret these as key presses */
+        GPIOA_INT_CLR = source;
+        return BUTTON_NONE;
+    }
+    if ((state & 0x1) == 0) {
+        btn |= BUTTON_RIGHT;
+    }
+    if ((state & 0x2) == 0) {
+        btn |= BUTTON_SELECT;
+    }
+    if ((state & 0x4) == 0) {
+        btn |= BUTTON_PLAY;
+    }
+    if ((state & 0x8) == 0) {
+        btn |= BUTTON_LEFT;
+    }
+    if ((state & 0x10) == 0) {
+        btn |= BUTTON_MENU;
+    }
+
+    if (source & 0xc0) {
+        handle_scroll_wheel((state & 0xc0) >> 6, was_hold, 0);
+    }
+
+    /* ack any active interrupts */
+    GPIOA_INT_CLR = source;
+
+    return btn;
+}
+
+void button_init_device(void)
+{
+    GPIOA_INT_LEV = ~GPIOA_INPUT_VAL;
+    GPIOA_INT_CLR = GPIOA_INT_STAT;
+    GPIOA_INT_EN  = 0xff;
+}
+
+/*
+ * Get button pressed from hardware
+ */
+int button_read_device(void)
+{
+    static bool hold_button = false;
+    bool hold_button_old;
+
+    /* normal buttons */
+    hold_button_old = hold_button;
+    hold_button = button_hold();
+
+    if (hold_button != hold_button_old)
+        backlight_hold_changed(hold_button);
+        
+    return ipod_3g_button_read();
+}
+
+bool button_hold(void)
+{
+    return (GPIOA_INPUT_VAL & 0x20)?false:true;
+}