1 files changed, 335 insertions, 0 deletions

diff --git a/firmware/target/arm/as3525/button-e200v2-fuze.c b/firmware/target/arm/as3525/button-e200v2-fuze.c
new file mode 100644
index 0000000000..6a9f02959c
--- /dev/null
+++ b/firmware/target/arm/as3525/button-e200v2-fuze.c
@@ -0,0 +1,335 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ *
+ * Copyright (C) 2008 by Thomas Martitz
+ * Copyright (C) 2008 by Dominik Wenger
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ****************************************************************************/
+
+#include "system.h"
+#include "button.h"
+#include "button-target.h"
+#include "backlight.h"
+
+
+#ifdef SANSA_FUZE
+#define DBOP_BIT15_BUTTON       BUTTON_HOME
+#define WHEEL_REPEAT_INTERVAL   (HZ/5)
+#define WHEEL_COUNTER_DIV       4
+#define ACCEL_INCREMENT         2
+#define ACCEL_SHIFT             2
+#define BUTTON_DELAY            45
+#endif
+
+#ifdef SANSA_E200V2
+#define DBOP_BIT15_BUTTON       BUTTON_REC
+#define WHEEL_REPEAT_INTERVAL   (HZ/5)
+#define WHEEL_COUNTER_DIV       2
+#define ACCEL_INCREMENT         3
+#define ACCEL_SHIFT             1
+#define BUTTON_DELAY            10
+
+/* read_missed is true if buttons could not
+ * be read (see lcd_button_support) */
+static bool read_missed              = false;
+
+#endif
+
+/* Buttons */
+static bool hold_button     = false;
+#ifndef BOOTLOADER
+static bool hold_button_old = false;
+#endif
+static unsigned short _dbop_din    = BUTTON_NONE;
+
+/* in the lcd driver */
+extern bool lcd_button_support(void);
+
+void button_init_device(void)
+{
+    GPIOA_DIR |= (1<<1);         
+    GPIOA_PIN(1) = (1<<1);
+}
+
+#if !defined(BOOTLOADER) && defined(HAVE_SCROLLWHEEL)
+static void scrollwheel(unsigned short dbop_din)
+{
+    /* current wheel values, parsed from dbop and the resulting button */
+    unsigned        wheel_value     = 0;
+    unsigned        btn             = BUTTON_NONE;
+    /* old wheel values */
+    static unsigned old_wheel_value = 0;
+    static unsigned old_btn         = BUTTON_NONE;
+
+    /*
+     * Getting BUTTON_REPEAT works like this: Remember when the btn value was
+     * posted to the button_queue last, and if it was recent enough, generate
+     * BUTTON_REPEAT
+     */
+    static long last_wheel_post = 0;
+
+    /*
+     *  Providing wheel acceleration works as follows: We increment accel
+     * by 2 if the wheel was turned, and decrement it by 1 each tick
+     * (no matter if it was turned), that means: the longer and faster you turn,
+     * the higher accel will be. accel>>2 will actually posted to the button_queue
+     */
+    static int accel = 0;
+    /* We only post every 4th action, as this matches better with the physical
+     * clicks of the wheel */
+    static int counter = 0;
+    /* Read wheel 
+     * Bits 13 and 14 of DBOP_DIN change as follows:
+     * Clockwise rotation   00 -> 01 -> 11 -> 10 -> 00
+     * Counter-clockwise    00 -> 10 -> 11 -> 01 -> 00
+     */
+    static const unsigned char wheel_tbl[2][4] =
+    {
+        { 2, 0, 3, 1 }, /* Clockwise rotation */
+        { 1, 3, 0, 2 }, /* Counter-clockwise  */ 
+    };
+
+    if(hold_button)
+    {
+        accel  =  counter  = 0;
+        return;
+    }
+
+    wheel_value = dbop_din & (1<<13|1<<14);
+    wheel_value >>= 13;
+
+    if (old_wheel_value == wheel_tbl[0][wheel_value])
+        btn = BUTTON_SCROLL_FWD;
+    else if (old_wheel_value == wheel_tbl[1][wheel_value])
+        btn = BUTTON_SCROLL_BACK;
+
+    if (btn != BUTTON_NONE)
+    {
+        if (btn != old_btn)
+        {
+            /* direction reversals nullify acceleration and counters */
+            old_btn =  btn;
+            accel  =  counter  = 0;
+        }
+        /* wheel_delta will cause lists to jump over items,
+         * we want this for fast scrolling, but we must keep it accurate
+         * for slow scrolling */
+        int wheel_delta = 0;
+        /* generate BUTTON_REPEAT if quick enough, scroll slightly faster too*/
+        if (TIME_BEFORE(current_tick, last_wheel_post + WHEEL_REPEAT_INTERVAL))
+        {
+            btn |= BUTTON_REPEAT;
+            wheel_delta = accel>>ACCEL_SHIFT;
+        }
+
+        accel += ACCEL_INCREMENT;
+
+        /* the wheel is more reliable if we don't send every change,
+         * every WHEEL_COUNTER_DIVth is basically one "physical click" 
+         * which should make up 1 item in lists */
+        if (++counter >= WHEEL_COUNTER_DIV && queue_empty(&button_queue))
+        {
+            buttonlight_on();
+            backlight_on();
+            queue_post(&button_queue, btn, ((wheel_delta+1)<<24));
+            /* message posted - reset count and remember post */
+            counter = 0;
+            last_wheel_post = current_tick;
+        }
+    }
+    if (accel > 0
+#ifdef SANSA_E200V2
+         && !read_missed /* decrement only if reading buttons was successful */
+#endif         
+        )
+        accel--;
+
+    old_wheel_value = wheel_value;
+}
+#endif /* !defined(BOOTLOADER) && defined(SCROLLWHEEL) */
+
+bool button_hold(void)
+{
+    return hold_button;
+}
+
+static void button_delay(void)
+{
+    int i = BUTTON_DELAY;
+    while(i--) asm volatile ("nop\n");
+}
+
+unsigned short button_read_dbop(void)
+{
+#ifdef SANSA_FUZE
+    /* skip home and power reading if lcd_button_support was blocked,
+     * since the dbop bit 15 is invalid then, and use the old value instead
+     * -20 (arbitary value) indicates valid home&power button read 
+     * (fuze only) */
+    int old_home_power = -20;
+#endif
+    if(!lcd_button_support())
+    {
+#if defined(SANSA_FUZE)
+        old_home_power = (_dbop_din & (1<<15|1<<8));
+#elif defined(SANSA_E200V2)
+        read_missed = true;
+#endif
+    }
+
+#ifdef SANSA_E200V2
+    if (!read_missed)   /* read buttons only if lcd_button_support was not blocked */
+#endif
+    {
+        /* Set up dbop for input */
+        DBOP_CTRL |= (1<<19);                /* Tri-state DBOP on read cycle */
+        DBOP_CTRL &= ~(1<<16);               /* disable output (1:write enabled) */
+        DBOP_TIMPOL_01 = 0xe167e167;         /* Set Timing & Polarity regs 0 & 1 */
+        DBOP_TIMPOL_23 = 0xe167006e;         /* Set Timing & Polarity regs 2 & 3 */
+
+        button_delay();
+        DBOP_CTRL |= (1<<15);                /* start read */
+        while (!(DBOP_STAT & (1<<16)));      /* wait for valid data */
+
+        _dbop_din = DBOP_DIN;                /* Read dbop data*/
+
+        /* Reset dbop for output */
+        DBOP_TIMPOL_01 = 0x6e167;            /* Set Timing & Polarity regs 0 & 1 */
+        DBOP_TIMPOL_23 = 0xa167e06f;         /* Set Timing & Polarity regs 2 & 3 */
+        DBOP_CTRL |= (1<<16);                /* Enable output (0:write disable)  */
+        DBOP_CTRL &= ~(1<<19);               /* Tri-state when no active write */
+    }
+
+#ifdef SANSA_FUZE
+    /* write back old values if blocked */
+    if (old_home_power != -20)
+    {
+        _dbop_din |= old_home_power & 1<<15;
+        _dbop_din &= 0xfeff|(old_home_power & 1<<8);
+    }
+#endif
+
+#if defined(HAVE_SCROLLWHEEL) && !defined(BOOTLOADER)
+    /* read wheel on bit 13 & 14, but sent to the button queue seperately */
+        scrollwheel(_dbop_din);
+#endif
+
+#ifdef SANSA_E200V2
+    read_missed = false;
+#endif
+
+    return _dbop_din;
+}
+
+/* for the debug menu */
+unsigned short button_dbop_data(void)
+{
+    return _dbop_din;
+}
+
+static int button_gpio(void)
+{
+    int btn = BUTTON_NONE;
+    if(hold_button)
+        return btn;
+    /* set afsel, so that we can read our buttons */
+    GPIOC_AFSEL &= ~(1<<2|1<<3|1<<4|1<<5|1<<6);
+    /* set dir so we can read our buttons (but reset the C pins first) */
+    GPIOB_DIR &= ~(1<<4);
+    GPIOC_DIR |= (1<<2|1<<3|1<<4|1<<5|1<<6);
+    GPIOC_PIN(2) = (1<<2);
+    GPIOC_PIN(3) = (1<<3);
+    GPIOC_PIN(4) = (1<<4);
+    GPIOC_PIN(5) = (1<<5);
+    GPIOC_PIN(6) = (1<<6);
+
+    GPIOC_DIR &= ~(1<<2|1<<3|1<<4|1<<5|1<<6);
+
+    /* small delay needed to read buttons correctly */
+    button_delay();
+
+    /* direct GPIO connections */
+    if (!GPIOC_PIN(3))
+        btn |= BUTTON_LEFT;
+    if (!GPIOC_PIN(2))
+        btn |= BUTTON_UP;
+    if (!GPIOC_PIN(6))
+        btn |= BUTTON_DOWN;
+    if (!GPIOC_PIN(5))
+        btn |= BUTTON_RIGHT;
+    if (!GPIOC_PIN(4))
+        btn |= BUTTON_SELECT;
+    /* return to settings needed for lcd */
+    GPIOC_DIR |= (1<<2|1<<3|1<<4|1<<5|1<<6);
+    GPIOC_AFSEL |= (1<<2|1<<3|1<<4|1<<5|1<<6);
+
+    return btn;
+}
+
+/*
+ * Get button pressed from hardware
+ */
+int button_read_device(void)
+{
+    int btn = BUTTON_NONE;
+    unsigned short dbop = button_read_dbop();
+#ifdef SANSA_FUZE
+    static unsigned power_counter = 0;
+#endif
+    /* hold button */
+    if(dbop & (1<<12))
+    {
+#ifdef SANSA_FUZE
+        power_counter = HZ;
+#endif
+        hold_button = true;
+    }
+    else
+    {
+        hold_button = false;
+#ifdef SANSA_FUZE
+    /* read power on bit 8, but not if hold button was just released, since
+     * you basically always hit power due to the slider mechanism after releasing
+     * (fuze only)
+     * hold (wait 1 sec) */
+        if (power_counter)
+            power_counter--;
+#endif
+        if (dbop & (1<<8)
+#ifdef SANSA_FUZE
+            && !power_counter
+#endif
+            )
+            btn |= BUTTON_POWER;
+    /* read home on bit 15 */
+        if (!(dbop & (1<<15)))
+            btn |= DBOP_BIT15_BUTTON;
+
+        btn |= button_gpio();
+    }
+
+#ifndef BOOTLOADER
+    /* light handling */
+    if (hold_button != hold_button_old)
+    {
+        hold_button_old = hold_button;
+        backlight_hold_changed(hold_button);
+    }
+#endif /* BOOTLOADER */
+
+    return btn;
+}