/*************************************************************************** * __________ __ ___. * 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) * * * 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. * ****************************************************************************/ /* * Rockbox button functions */ #include #include "config.h" #include "cpu.h" #include "system.h" #include "button.h" #include "kernel.h" #include "backlight.h" #include "serial.h" #include "power.h" #include "powermgmt.h" #define WHEEL_FAST_OFF_TIMEOUT 250000 /* timeout for acceleration = 250ms */ #define WHEEL_REPEAT_TIMEOUT 250000 /* timeout for button repeat = 250ms */ #define WHEEL_UNTOUCH_TIMEOUT 150000 /* timeout for untouching wheel = 100ms */ #define WHEELCLICKS_PER_ROTATION 96 /* wheelclicks per full rotation */ /* This amount of clicks is needed for at least scrolling 1 item. Choose small values * to have high sensitivity but few precision, choose large values to have less * sensitivity and good precision. */ #if defined(IPOD_NANO) #define WHEEL_SENSITIVITY 6 /* iPod nano has smaller wheel, lower sensitivity needed */ #else #define WHEEL_SENSITIVITY 4 /* default sensitivity */ #endif int old_wheel_value = -1; int new_wheel_value = 0; int repeat = 0; int wheel_delta = 0; bool wheel_is_touched = false; unsigned int accumulated_wheel_delta = 0; unsigned int wheel_repeat = 0; unsigned int wheel_velocity = 0; unsigned long last_wheel_usec = 0; /* Variable to use for setting button status in interrupt handler */ int int_btn = BUTTON_NONE; #ifdef HAVE_WHEEL_POSITION static int wheel_position = -1; static bool send_events = true; #endif static void opto_i2c_init(void) { DEV_EN |= DEV_OPTO; DEV_RS |= DEV_OPTO; udelay(5); DEV_RS &= ~DEV_OPTO; /* finish reset */ DEV_INIT1 |= INIT_BUTTONS; /* enable buttons (needed for "hold"-detection) */ outl(0xc00a1f00, 0x7000c100); outl(0x01000000, 0x7000c104); } static inline int ipod_4g_button_read(void) { int whl = -1; int btn = BUTTON_NONE; /* The following delay was 250 in the ipodlinux source, but 50 seems to work fine - tested on Nano, Color/Photo and Video. */ udelay(50); if ((inl(0x7000c104) & 0x04000000) != 0) { unsigned status = inl(0x7000c140); if ((status & 0x800000ff) == 0x8000001a) { if (status & 0x00000100) btn |= BUTTON_SELECT; if (status & 0x00000200) btn |= BUTTON_RIGHT; if (status & 0x00000400) btn |= BUTTON_LEFT; if (status & 0x00000800) btn |= BUTTON_PLAY; if (status & 0x00001000) btn |= BUTTON_MENU; if (status & 0x40000000) { unsigned long usec = USEC_TIMER; /* Highest wheel = 0x5F, clockwise increases */ new_wheel_value = (status >> 16) & 0x7f; whl = new_wheel_value; /* switch on backlight (again), reset power-off timer */ backlight_on(); reset_poweroff_timer(); /* Check whether the scrollwheel was untouched by accident or by will. */ /* This is needed because wheel may be untoched very shortly during rotation */ if ( (!wheel_is_touched) && TIME_AFTER(usec, last_wheel_usec + WHEEL_UNTOUCH_TIMEOUT) ) { /* wheel has been really untouched -> reset internal variables */ old_wheel_value = -1; wheel_velocity = 0; accumulated_wheel_delta = 0; wheel_repeat = BUTTON_NONE; } else { /* wheel was shortly untouched by accident -> leave internal variables */ wheel_is_touched = true; } if (old_wheel_value >= 0) { /* This is for later = BUTTON_SCROLL_TOUCH;*/ wheel_delta = new_wheel_value - old_wheel_value; unsigned int wheel_keycode = BUTTON_NONE; /* Taking into account wrapping during transition from highest * to lowest wheel position and back */ if (wheel_delta < -WHEELCLICKS_PER_ROTATION/2) wheel_delta += WHEELCLICKS_PER_ROTATION; /* Forward wrapping case */ else if (wheel_delta > WHEELCLICKS_PER_ROTATION/2) wheel_delta -= WHEELCLICKS_PER_ROTATION; /* Backward wrapping case */ /* Getting direction and wheel_keycode from wheel_delta. * Need at least some clicks to be sure to avoid haptic fuzziness */ if (wheel_delta >= WHEEL_SENSITIVITY) wheel_keycode = BUTTON_SCROLL_FWD; else if (wheel_delta <= -WHEEL_SENSITIVITY) wheel_keycode = BUTTON_SCROLL_BACK; else wheel_keycode = BUTTON_NONE; if (wheel_keycode != BUTTON_NONE) { long v = (usec - last_wheel_usec) & 0x7fffffff; /* undo signedness */ wheel_delta = (wheel_delta>0) ? wheel_delta : -wheel_delta; /* add the current wheel_delta */ accumulated_wheel_delta += wheel_delta; v = v ? (1000000 * wheel_delta) / v : 0; /* clicks/sec = 1000000 * clicks/usec */ v = (v * 360) / WHEELCLICKS_PER_ROTATION; /* conversion to degree/sec */ v = (v<0) ? -v : v; /* undo signedness */ /* some velocity filtering to smooth things out */ wheel_velocity = (31 * wheel_velocity + v) / 32; /* limit to 24 bit */ wheel_velocity = (wheel_velocity>0xffffff) ? 0xffffff : wheel_velocity; /* assume REPEAT = off */ repeat = 0; /* direction reversals must nullify acceleration and accumulator */ if (wheel_keycode != wheel_repeat) { wheel_repeat = wheel_keycode; wheel_velocity = 0; accumulated_wheel_delta = 0; } /* on same direction REPEAT is assumed when new click is within timeout */ else if (TIME_BEFORE(usec, last_wheel_usec + WHEEL_REPEAT_TIMEOUT)) { repeat = BUTTON_REPEAT; } /* timeout nullifies acceleration and accumulator */ if (TIME_AFTER(usec, last_wheel_usec + WHEEL_FAST_OFF_TIMEOUT)) { wheel_velocity = 0; accumulated_wheel_delta = 0; } #ifdef HAVE_WHEEL_POSITION if (send_events) #endif /* The queue should have no other events when scrolling */ if (queue_empty(&button_queue)) { /* each WHEEL_SENSITIVITY clicks = scrolling 1 item */ accumulated_wheel_delta /= WHEEL_SENSITIVITY; #ifdef HAVE_SCROLLWHEEL /* use data-format for HAVE_SCROLLWHEEL */ /* always use acceleration mode (1<<31) */ /* always set message post count to (1<<24) for iPod */ /* this way the scrolling is always calculated from wheel_velocity */ queue_post(&button_queue, wheel_keycode | repeat, (1<<31) | (1 << 24) | wheel_velocity); #else queue_post(&button_queue, wheel_keycode | repeat, (accumulated_wheel_delta << 16) | new_wheel_value); #endif accumulated_wheel_delta = 0; } last_wheel_usec = usec; old_wheel_value = new_wheel_value; } } else { /* scrollwheel was touched for the first time after finger lifting */ old_wheel_value = new_wheel_value; wheel_is_touched = true; } } else { /* In this case the finger was lifted from the scrollwheel. */ wheel_is_touched = false; } } } #ifdef HAVE_WHEEL_POSITION /* Save the new absolute wheel position */ wheel_position = whl; #endif return btn; } #ifdef HAVE_WHEEL_POSITION int wheel_status(void) { return wheel_position; } void wheel_send_events(bool send) { send_events = send; } #endif void ipod_4g_button_int(void) { CPU_HI_INT_DIS = I2C_MASK; int_btn = ipod_4g_button_read(); outl(inl(0x7000c104) | 0x0c000000, 0x7000c104); outl(0x400a1f00, 0x7000c100); CPU_HI_INT_EN = I2C_MASK; } void button_init_device(void) { opto_i2c_init(); /* hold button - enable as input */ GPIOA_ENABLE |= 0x20; GPIOA_OUTPUT_EN &= ~0x20; /* unmask interrupt */ CPU_INT_EN = HI_MASK; CPU_HI_INT_EN = I2C_MASK; } /* * 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); if (hold_button) { /* lock -> disable wheel sensor */ DEV_EN &= ~DEV_OPTO; } else { /* unlock -> enable wheel sensor */ DEV_EN |= DEV_OPTO; opto_i2c_init(); } } /* The int_btn variable is set in the button interrupt handler */ #ifdef IPOD_ACCESSORY_PROTOCOL return int_btn | remote_control_rx(); #else return int_btn; #endif } bool button_hold(void) { return (GPIOA_INPUT_VAL & 0x20)?false:true; } bool headphones_inserted(void) { return (GPIOA_INPUT_VAL & 0x80)?true:false; }