1 files changed, 171 insertions, 0 deletions

diff --git a/firmware/target/arm/imx233/creative-zenxfi3/button-zenxfi3.c b/firmware/target/arm/imx233/creative-zenxfi3/button-zenxfi3.c
new file mode 100644
index 0000000000..174ddc217c
--- /dev/null
+++ b/firmware/target/arm/imx233/creative-zenxfi3/button-zenxfi3.c
@@ -0,0 +1,171 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   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 "string.h"
+#include "usb.h"
+#include "backlight.h"
+#include "mpr121.h"
+
+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)
+{
+    (void) bank;
+    (void) pin;
+    /* 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_setup_pin_irq(0, 18, true, true, false, &mpr121_irq_cb);
+    }
+}
+
+/* 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_set_pin_function(0, 18, PINCTRL_FUNCTION_GPIO);
+    imx233_enable_gpio_output(0, 18, false);
+    imx233_setup_pin_irq(0, 18, true, true, false, &mpr121_irq_cb);
+}
+
+bool button_hold(void)
+{
+    /* B0P04: #hold */
+    return !imx233_get_gpio_input_mask(0, 0x10);
+}
+
+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;
+#ifndef BOOTLOADER
+        backlight_hold_changed(hold);
+#endif /* BOOTLOADER */
+        if(!hold)
+            power_ignore_counter = HZ;
+    }
+
+    if(power_ignore_counter)
+        power_ignore_counter--;
+    
+    int res = 0;
+    /* B2P07: #volume-
+     * B2P08: #volume+
+     * PSWITCH: power */
+    uint32_t mask = imx233_get_gpio_input_mask(2, 0x180);
+    if(!(mask & 0x80))
+        res |= BUTTON_VOL_DOWN;
+    if(!(mask & 0x100))
+        res |= BUTTON_VOL_UP;
+    /* WARNING: it seems that the voltage on PSWITCH depends on whether
+     * usb is connected or not ! Thus the value of this field can be 1 or 3 */
+    if(__XTRACT(HW_POWER_STS, PSWITCH) != 0 && power_ignore_counter == 0)
+        res |= BUTTON_POWER;
+    return res | touchpad_btns;
+}