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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2012 by Amaury Pouly
*
* 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 "button-target.h"
#include "system.h"
#include "system-target.h"
#include "pinctrl-imx233.h"
#include "power-imx233.h"
#include "button-imx233.h"
#include "string.h"
#include "usb.h"
#include "backlight.h"
#include "mpr121.h"
#define I_VDDIO 0 /* index in the table */
struct imx233_button_map_t imx233_button_map[] =
{
[I_VDDIO] = IMX233_BUTTON_(VDDIO, VDDIO(3640), "vddio"), /* we need VDDIO for relative */
IMX233_BUTTON_(HOLD, GPIO(0, 4), "jack", INVERTED),
IMX233_BUTTON(VOL_DOWN, GPIO(2, 7), "vol_down", INVERTED),
IMX233_BUTTON(VOL_UP, GPIO(2, 8), "vol_up", INVERTED),
IMX233_BUTTON_(JACK, LRADC_REL(5, 3520, I_VDDIO), "jack"),
IMX233_BUTTON(POWER, PSWITCH(1), "power"),
IMX233_BUTTON_(END, END(), "")
};
static struct mpr121_config_t config =
{
.ele =
{
[0] = {.tth = 5, .rth = 4 },
[1] = {.tth = 5, .rth = 4 },
[2] = {.tth = 5, .rth = 4 },
[3] = {.tth = 5, .rth = 4 },
[4] = {.tth = 4, .rth = 3 },
[5] = {.tth = 4, .rth = 3 },
[6] = {.tth = 5, .rth = 4 },
[7] = {.tth = 5, .rth = 4 },
[8] = {.gpio = ELE_GPIO_OUTPUT_OPEN_LED },
},
.filters =
{
.ele =
{
.rising = {.mhd = 1, .nhd = 1, .ncl = 1, .fdl = 1 },
.falling = {.mhd = 1, .nhd = 1, .ncl = 0xff, .fdl = 2 },
}
},
.autoconf =
{
.en = true, .ren = true, .retry = RETRY_NEVER,
.usl = 0xc4, .lsl = 0x7f, .tl = 0xb0
},
.ele_en = ELE_EN0_x(7),
.cal_lock = CL_TRACK
};
#define MPR121_INTERRUPT 1
static int touchpad_btns = 0;
static long mpr121_stack[DEFAULT_STACK_SIZE/sizeof(long)];
static const char mpr121_thread_name[] = "mpr121";
static struct event_queue mpr121_queue;
static void mpr121_irq_cb(int bank, int pin, intptr_t user)
{
(void) bank;
(void) pin;
(void) user;
/* the callback will not be fired until interrupt is enabled back so
* the queue will not overflow or contain multiple MPR121_INTERRUPT events */
queue_post(&mpr121_queue, MPR121_INTERRUPT, 0);
}
static void mpr121_thread(void)
{
struct queue_event ev;
while(1)
{
queue_wait(&mpr121_queue, &ev);
/* handle usb connect and ignore all messages except rmi interrupts */
if(ev.id == SYS_USB_CONNECTED)
{
usb_acknowledge(SYS_USB_CONNECTED_ACK);
continue;
}
else if(ev.id != MPR121_INTERRUPT)
continue;
/* clear interrupt and get status */
unsigned status;
touchpad_btns = 0;
if(!mpr121_get_touch_status(&status))
{
/* ELE3: up
* ELE4: back
* ELE5: menu
* ELE6: down
* ELE7: play */
if(status & 0x8) touchpad_btns |= BUTTON_UP;
if(status & 0x10) touchpad_btns |= BUTTON_BACK;
if(status & 0x20) touchpad_btns |= BUTTON_MENU;
if(status & 0x40) touchpad_btns |= BUTTON_DOWN;
if(status & 0x80) touchpad_btns |= BUTTON_PLAY;
}
/* enable interrupt */
imx233_pinctrl_setup_irq(0, 18, true, true, false, &mpr121_irq_cb, 0);
}
}
/* B0P18 is #IRQ line of the touchpad */
void button_init_device(void)
{
mpr121_init(0xb4);
mpr121_soft_reset();
mpr121_set_config(&config);
queue_init(&mpr121_queue, true);
create_thread(mpr121_thread, mpr121_stack, sizeof(mpr121_stack), 0,
mpr121_thread_name IF_PRIO(, PRIORITY_USER_INTERFACE) IF_COP(, CPU));
/* enable interrupt */
imx233_pinctrl_acquire(0, 18, "mpr121_int");
imx233_pinctrl_set_function(0, 18, PINCTRL_FUNCTION_GPIO);
imx233_pinctrl_enable_gpio(0, 18, false);
imx233_pinctrl_setup_irq(0, 18, true, true, false, &mpr121_irq_cb, 0);
/* generic part */
imx233_button_init();
}
int button_read_device(void)
{
/* since sliding hold will usually trigger power, ignore power button
* for one second after hold is released */
static int power_ignore_counter = 0;
static bool old_hold;
/* light handling */
bool hold = button_hold();
if(hold != old_hold)
{
old_hold = hold;
if(!hold)
power_ignore_counter = HZ;
}
int res = imx233_button_read(touchpad_btns);
if(power_ignore_counter >= 0)
res &= ~BUTTON_POWER;
else
power_ignore_counter--;
}
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