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