diff options
Diffstat (limited to 'firmware/target/arm/as3525/button-e200v2-fuze.c')
| -rw-r--r-- | firmware/target/arm/as3525/button-e200v2-fuze.c | 335 |
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; +} |