Android GPIO输入

by · 2016年01月11日 · 894 Words · ~2min reading time | Improve on


原文链接： Android GPIO输入

petazzoni-device-tree-dummies
Android编译系统参考手册
键值从键盘到Linux内核传输过程分析
Android4.2.2自增物理按键frameworks
android kl文件
android4.0 添加一个新的android 键值
按键从Linux到Android
Android下添加新的自定义键值和按键处理流程
android 添加新的键值，自定义按键

Android添加新键值实现

扫描码是Linux Input系统中规定的码值 /kernel/include/input.h
Android也定义了一套码，叫作键盘码 .kl

android kl文件优先级

/system/usr/keylayout/Vendor_XXXX_Product_XXXX_Version_XXXX.kl
/system/usr/keylayout/Vendor_XXXX_Product_XXXX.kl
/system/usr/keylayout/DEVICE_NAME.kl
/data/system/devices/keylayout/Vendor_XXXX_Product_XXXX_Version_XXXX.kl
/data/system/devices/keylayout/Vendor_XXXX_Product_XXXX.kl
/data/system/devices/keylayout/DEVICE_NAME.kl
/system/usr/keylayout/Generic.kl
/data/system/devices/keylayout/Generic.kl

#查看事件和设备的关联
adb shell cat /proc/bus/input/devices

I: Bus=0000 Vendor=0000 Product=0000 Version=0000
N: Name="qpnp_pon"
P: Phys=qpnp_pon/input0
S: Sysfs=/devices/virtual/input/input2
U: Uniq=
H: Handlers=kbd event2 cpufreq cpufreq
B: PROP=10
B: EV=3
B: KEY=140000 0 0 0

#获取输入事件
adb shell getevent
root@M120D:/ # getevent
add device 1: /dev/input/event4
name: "msm8x10-skuaa-snd-card Headset Jack"
add device 2: /dev/input/event3
name: "msm8x10-skuaa-snd-card Button Jack"
add device 3: /dev/input/event1
name: "qpnp_pon"
add device 4: /dev/input/event0
name: "acc"
add device 5: /dev/input/event2
name: "gpio-keys"
//press Volume UP
/dev/input/event2: 0001 0073 00000001
/dev/input/event2: 0000 0000 00000000
/dev/input/event2: 0001 0073 00000000
/dev/input/event2: 0000 0000 00000000
//press Volume DOWN
/dev/input/event1: 0001 0072 00000001
/dev/input/event1: 0000 0000 00000000
//release
/dev/input/event1: 0001 0072 00000000
/dev/input/event1: 0000 0000 00000000
//press POWER
/dev/input/event1: 0001 0074 00000001
/dev/input/event1: 0000 0000 00000000
//release
/dev/input/event1: 0001 0074 00000000
/dev/input/event1: 0000 0000 00000000

              Type  code value

Linux上传的Code是0x0073 对应10进制115
Kernel/include/input.h KEY_VOLUMEUP 115

模拟按键

Press power button(Don't release)

$ adb shell sendevent /dev/input/event2 1 $((0x74)) 1
$ adb shell sendevent /dev/input/event2 0 0 0

Release power button

$ adb shell sendevent /dev/input/event5 1 $((0x74)) 0
$ adb shell sendevent /dev/input/event5 0 0 0

Linux

#define KEY_POWER 116 //SC System Power Down
Android也定义了一套码，叫作键盘码，power 0x74 116
通过一个/system/usr/keylayout/来将两套码对应起来
1.
frameworks/base/core/java/android/view/KeyEvent.java
410 public static final int KEYCODE_F1 = 131;

638 // NOTE: If you add a new keycode here you must also add it to:

//  isSystem()
//  frameworks/native/include/android/keycodes.h
//  frameworks/base/include/androidfw/KeycodeLabels.h
//  external/webkit/WebKit/android/plugins/ANPKeyCodes.h
//  frameworks/base/core/res/res/values/attrs.xml
//  emulator?
//  LAST_KEYCODE
//  KEYCODE_SYMBOLIC_NAMES
//
//  Also Android currently does not reserve code ranges for vendor-
//  specific key codes.  If you have new key codes to have, you
//  MUST contribute a patch to the open source project to define
//  those new codes.  This is intended to maintain a consistent
//  set of key code definitions across all Android devices.
// Symbolic names of all key codes.
private static final SparseArray<String> KEYCODE_SYMBOLIC_NAMES = new SparseArray<String>();
private static void populateKeycodeSymbolicNames() {
    SparseArray<String> names = KEYCODE_SYMBOLIC_NAMES;

658 names.append(KEYCODE_UNKNOWN, "KEYCODE_UNKNOWN");
789 names.append(KEYCODE_F1, "KEYCODE_F1");
2.
frameworks/native/include/android/keycodes.h

frameworks/base/policy/src/com/android/internal/policy/impl/PhoneWindowManager.java

2030 if ((keyCode == KeyEvent.KEYCODE_F1) && down) {

 Intent intent4 = new Intent();
 //ComponentName cn4 = new ComponentName("com.android.camera", "com.android.camera.Camera");
 ComponentName cn4 = new ComponentName("com.android.camera2", "com.android.camera.CameraLauncher");
 intent4.setComponent(cn4);
 intent4.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
 intent4.setAction("android.intent.action.MAIN");
 mContext.startActivity(intent4);
 }

/M120D/target/product/M120D/obj/KERNEL_OBJ/scripts/dtc/dtc -p 1024 -O dtb -o
./kernel/arch/arm/boot/dts/msm8610-rumi.dts;

./kernel/arch/arm/boot/dts/msm8610-sim.dts;
./kernel/arch/arm/boot/dts/msm8610-v1-cdp.dts;
./kernel/arch/arm/boot/dts/msm8610-v1-mtp.dts;
./kernel/arch/arm/boot/dts/msm8610-v1-qrd-skuaa.dts;
./kernel/arch/arm/boot/dts/msm8610-v1-qrd-skuab-dvt2.dts;

./kernel/arch/arm/boot/dts/msm8610-v1-qrd-skuab.dts;
./kernel/arch/arm/boot/dts/msm8610-v2-cdp.dts;
./kernel/arch/arm/boot/dts/msm8610-v2-mtp.dts;
./kernel/arch/arm/boot/dts/msm8610-v2-qrd-skuaa.dts;
./kernel/arch/arm/boot/dts/msm8610-v2-qrd-skuab-dvt2.dts;

./kernel/arch/arm/boot/dts/msm8610-v2-qrd-skuab.dts;

/kernel/arch/arm/boot/dts/msm8610-mdss.dtsi

qcom,platform-lcd-power-en-gpio = <&pm8110_gpios 2 0>;去掉

//
msm-pm8100.dtsi 电源键配置

  1. 将GPIO_78 配置为 keycode 59
    /kernel/arch/arm/boot/dts/msm8610-qrd.dtsi
    key_f1 {
    label = "key_f1";
    gpios = <&msmgpio 78 0x1>;
    linux,input-type = <1>;
    linux,code = <59>;
    gpio-key,wakeup;
    debounce-interval = <15>;
    };
    2./kernel/arch/arm/mach-msm/board-8610-gpiomux.c
    .gpio = 78,
    .settings = {
    [GPIOMUX_ACTIVE] = &m120ay_custom_gpio_config,-->gpio_keys_active
    [GPIOMUX_SUSPENDED] = &m120ay_custom_gpio_config,-->gpio_keys_suspend
    },
    3.//实现 将Linux key code 59 映射为F1
    /device/reach/M120D/gpio-keys.kl
    key 59 F1 WAKE

<4>[ 3170.548611] /mnt/M120D_Release/kernel/drivers/misc/ytgpio_ctrl.c:yt_gpio_init:166: yt_gpio_init:gpio: = 76 GPIO_9
<4>[ 3170.568567] /mnt/M120D_Release/kernel/drivers/misc/ytgpio_ctrl.c:yt_gpio_init:166: yt_gpio_init:gpio: = 83 GPIO_3
<4>[ 3170.588833] /mnt/M120D_Release/kernel/drivers/misc/ytgpio_ctrl.c:yt_gpio_init:166: yt_gpio_init:gpio: = 86
<4>[ 3170.608561] /mnt/M120D_Release/kernel/drivers/misc/ytgpio_ctrl.c:yt_gpio_init:166: yt_gpio_init:gpio: = 88
<4>[ 3170.628554] /mnt/M120D_Release/kernel/drivers/misc/ytgpio_ctrl.c:yt_gpio_init:166: yt_gpio_init:gpio: = 89

引出的引脚为 GPIO_7 6 1 5 4
对应的gpio号为 78 77 9
SWDCLK
VCC3.3
GND
GND
GPIO_7 pin25 GPIO_7 gpio_78
GPIO_6 pin25 GPIO_8 gpio_77
GPIO_1 PIN_79 BLSP3_UART_RX gpio_9
GPIO_5 PIN_69 UIM1_RESET gpio_38
GPIO_4 PIN_68 SDC2_CARD_DET gpio_42
MISO PIN_78 BLSP1_SPI_MISO gpio_87
CE0 PIN_21 BLSP1_SPI_CS_N gpio_88
MOSI PIN_22 BLSP1_SPI_MOSI gpio_86
SCLK PIN_77 BLSP1_SPI_CLK gpio_89

#######BUG
/kernel/arch/arm/mach-msm/board-8610-gpiomux.c:1242
static struct gpiomux_setting interrupt_gpio_suspend_pulldown = {

.func = GPIOMUX_FUNC_GPIO,
.drv = GPIOMUX_DRV_6MA,
.pull = GPIOMUX_PULL_UP,>>>GPIOMUX_PULL_DOWN

};

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