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Diffstat (limited to 'firmware/target/arm/as3525/button-e200v2-fuze.c')
-rw-r--r--firmware/target/arm/as3525/button-e200v2-fuze.c335
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diff --git a/firmware/target/arm/as3525/button-e200v2-fuze.c b/firmware/target/arm/as3525/button-e200v2-fuze.c
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index 0000000000..6a9f02959c
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+++ 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;
+}