itop4412添加按键key

1.kernel部分修改

在mach-itop4412.c（arch/arm/mach-exynos下）static struct gpio_keys_button gpio_buttons[]添加

{
                .gpio           = EXYNOS4_GPX2(6),
                //.code         = 38,
                .code           = KEY_YCC_PHONE,
                .desc           = "BUTTON6",
                .active_low     = 1,
                .wakeup         = 0,
        },
{
                .gpio           = EXYNOS4_GPX3(5),
                //.code         = 38,
                .code           = KEY_YCC_BREAK,
                .desc           = "BUTTON7",
                .active_low     = 1,
                .wakeup         = 0,
        }

由于我所用的引脚冲突，需要在setup-keypad.c（arch/arm/mach-exynos下）注释掉冲突引脚，代码如下

#include <linux/gpio.h>
#include <plat/gpio-cfg.h>

void samsung_keypad_cfg_gpio(unsigned int rows, unsigned int cols)
{
	/* Keypads can be of various combinations, Just making sure */
#if defined(CONFIG_CPU_TYPE_SCP_SUPPER) || defined(CONFIG_CPU_TYPE_POP_SUPPER) || defined(CONFIG_CPU_TYPE_POP2G_SUPPER)
	/* Set all the necessary GPX2 pins: KP_ROW[x] */
	s3c_gpio_cfgall_range(EXYNOS4_GPX2(0), 2,
					 S3C_GPIO_SFN(3), S3C_GPIO_PULL_UP);

	/*GPL2: KP_COL[x] */
	s3c_gpio_cfgrange_nopull(EXYNOS4_GPL2(0), 1, S3C_GPIO_SFN(3));
#elif  defined(CONFIG_CPU_TYPE_SCP_ELITE) || defined(CONFIG_CPU_TYPE_POP_ELITE) || defined(CONFIG_CPU_TYPE_POP2G_ELITE)
	//ROW_6
	/*s3c_gpio_cfgall_range(EXYNOS4_GPX2(6), 1,
                                         S3C_GPIO_SFN(3), S3C_GPIO_PULL_UP);

	//ROW_7
	s3c_gpio_cfgall_range(EXYNOS4_GPX2(7), 1,
                                         S3C_GPIO_SFN(3), S3C_GPIO_PULL_UP);

	//ROW_8
	s3c_gpio_cfgall_range(EXYNOS4_GPX3(0), 1,
                                         S3C_GPIO_SFN(3), S3C_GPIO_PULL_UP);

	//ROW_13
	s3c_gpio_cfgall_range(EXYNOS4_GPX3(5), 1,
                                         S3C_GPIO_SFN(3), S3C_GPIO_PULL_UP);

	//COL_0
	s3c_gpio_cfgrange_nopull(EXYNOS4_GPX1(0), 1, S3C_GPIO_SFN(3));

	//COL_3
	s3c_gpio_cfgrange_nopull(EXYNOS4_GPX1(3), 1, S3C_GPIO_SFN(3));

	//COL_5
	s3c_gpio_cfgrange_nopull(EXYNOS4_GPX1(5), 1, S3C_GPIO_SFN(3));

	//COL_6
	s3c_gpio_cfgrange_nopull(EXYNOS4_GPX1(6), 1, S3C_GPIO_SFN(3));*/
#endif
}

为了后面安卓系统调用，修改input.h（include/linux下）添加按键定义

#define KEY_YCC_PHONE   251
#define KEY_YCC_BREAK   252

linux部分修改就这样了

2.安卓部分修改，有点多

首先需要修改的是和kernel对应的文件Generic.kl（iTop4412_ICS_git\frameworks\base\data\keyboards）

key 251   KEY_YCC_PHONE
key 252   KEY_YCC_BREAK

然后依次修改下面文件了ANPKeyCodes.h（iTop4412_ICS_git\external\webkit\Source\WebKit\android\plugins）的enum ANPKeyCodes 下添加

	kKeyYccPhone_ANPKeyCode = 211,
	kKeyYccBreak_ANPKeyCode = 212,

attrs.xml（iTop4412_ICS_git\frameworks\base\core\res\res\values）的<attr name="keycode">下添加

		<enum name="KEYCODE_KEY_YCC_PHONE" value="211" />
		<enum name="KEYCODE_KEY_YCC_BREAK" value="212" />

Input.cpp（iTop4412_ICS_git\frameworks\base\libs\ui）的bool KeyEvent::isSystemKey(int32_t keyCode) 下添加

		case AKEYCODE_KEY_YCC_PHONE:
		case AKEYCODE_KEY_YCC_BREAK:

KeycodeLabels.h（iTop4412_ICS_git\frameworks\base\include\ui）的static const KeycodeLabel KEYCODES[]下添加

	{ "KEY_YCC_PHONE", 211 },
	{ "KEY_YCC_BREAK", 212 },

keycodes.h（iTop4412_ICS_git\frameworks\base\native\include\android）下添加

	AKEYCODE_KEY_YCC_PHONE   = 211,
	AKEYCODE_KEY_YCC_BREAK   = 212,

KeyEvent.java（iTop4412_ICS_git\frameworks\base\core\java\android\view）的public class KeyEvent extends InputEvent implements Parcelable下面添加

	/** {@hide} */
	public static final int KEYCODE_KEY_YCC_PHONE      = 211;
	/** {@hide} */
	public static final int KEYCODE_KEY_YCC_BREAK      = 212;

还有  private static void populateKeycodeSymbolicNames()里面添加

	names.append(KEYCODE_KEY_YCC_PHONE, "KEYCODE_KEY_YCC_PHONE");
        names.append(KEYCODE_KEY_YCC_BREAK, "KEYCODE_KEY_YCC_BREAK");

其实仔细看一下KeyEvent.java文件的public class KeyEvent extends InputEvent implements Parcelable下面有一段说明的

    // NOTE: If you add a new keycode here you must also add it to:
    //  isSystem()
    //  native/include/android/keycodes.h
    //  frameworks/base/include/ui/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.

写了需要修改的文件，可以按照他说的修改，名字什么的都是需要对应的，还需要和kernel对应起来，Android才能识别到kernel里面的按键

公司破电脑编译个Android真慢！

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