rk3399_android7.1调试USB接口的TP记录

调试过程记录：
基本信息列表：
1. CPU type : RK3399
2. Kernel version : kernel4.4
3. Android version: Android7.1
4. Touch Controller Interface : USB
5. Touch Controller Type：EETI EXC80H80

1、确保kernel的rockchip_defconfigs文件以下的宏打开：

1. CONFIG_INPUT_EVDEV
2. CONFIG_INPUT_UINPUT
3. CONFIG_HIDRAW  ( for USB Interface )
4. HID_MULTITOUCH  ( USB Interface & Kernel 3.0 upwards )

2、kernel做以下修改（其实这里主要是做TP vid的识别方面的内容）：

diff --git a/drivers/input/evdev.c b/drivers/input/evdev.c
index e9ae3d5..02c60e3 100644
--- a/drivers/input/evdev.c
+++ b/drivers/input/evdev.c
@@ -1449,6 +1449,15 @@ static void evdev_disconnect(struct input_handle *handle)
 	put_device(&evdev->dev);
 }
 
+static bool evdev_match(struct input_handler *handler, struct input_dev *dev)
+{
+/* Avoid EETI USB touchscreens */
+#define VID_EETI 0x0EEF
+	if ((BUS_USB == dev->id.bustype) && (VID_EETI == dev->id.vendor))
+		return false;
+	return true;
+}
+
 static const struct input_device_id evdev_ids[] = {
 	{ .driver_info = 1 },	/* Matches all devices */
 	{ },			/* Terminating zero entry */
@@ -1459,6 +1468,7 @@ MODULE_DEVICE_TABLE(input, evdev_ids);
 static struct input_handler evdev_handler = {
 	.event		= evdev_event,
 	.events		= evdev_events,
+	.match = evdev_match, /* Added by EETI*/
 	.connect	= evdev_connect,
 	.disconnect	= evdev_disconnect,
 	.legacy_minors	= true,
diff --git a/drivers/input/joydev.c b/drivers/input/joydev.c
index 5d11fea..cdb1443 100644
--- a/drivers/input/joydev.c
+++ b/drivers/input/joydev.c
@@ -809,6 +809,11 @@ static bool joydev_match(struct input_handler *handler, struct input_dev *dev)
 	if (joydev_dev_is_absolute_mouse(dev))
 		return false;
 
+	/* Avoid EETI virtual devices */
+#define VID_EETI 0x0EEF
+	if (( BUS_VIRTUAL == dev->id.bustype) && (VID_EETI == dev->id.vendor))
+		return false;
+
 	return true;
 }
 
diff --git a/drivers/input/mousedev.c b/drivers/input/mousedev.c
index b604564..4ec970b 100644
--- a/drivers/input/mousedev.c
+++ b/drivers/input/mousedev.c
@@ -1002,6 +1002,18 @@ static void mousedev_disconnect(struct input_handle *handle)
 	mousedev_destroy(mousedev);
 }
 
+static bool mousedev_match(struct input_handler *handler, struct input_dev *dev)
+{
+/* Avoid EETI USB touchscreens */
+#define VID_EETI 0x0EEF
+	if ((BUS_USB == dev->id.bustype) && (VID_EETI == dev->id.vendor))
+		return false;
+/* Avoid EETI virtual devices */
+	if ((BUS_VIRTUAL == dev->id.bustype) && (VID_EETI == dev->id.vendor))
+		return false;
+	return true;
+}
+
 static const struct input_device_id mousedev_ids[] = {
 	{
 		.flags = INPUT_DEVICE_ID_MATCH_EVBIT |
@@ -1056,6 +1068,7 @@ MODULE_DEVICE_TABLE(input, mousedev_ids);
 static struct input_handler mousedev_handler = {
 	.event		= mousedev_event,
 	.connect	= mousedev_connect,
+	.match		= mousedev_match, /* Added by EETI */
 	.disconnect	= mousedev_disconnect,
 	.legacy_minors	= true,
 	.minor		= MOUSEDEV_MINOR_BASE,

3、see uinput under /dev/input/uinput or /dev/uinput

rk3399_all:/ # ls -l /dev/uinput
crw-rw---- 1 system net_bt_stack 10, 223 1970-01-01 00:00 /dev/uinput

4、rk3399_all:/ # ls -l dev/hidraw0

crw------- 1 root root 237,   0 1970-01-01 00:00 dev/hidraw0

5、cat /proc/bus/input/devices

rk3399_all:/ # cat /proc/bus/input/devices
I: Bus=0019 Vendor=0001 Product=0001 Version=0100
N: Name="ff420030.pwm"
P: Phys=gpio-keys/remotectl
S: Sysfs=/devices/platform/ff420030.pwm/input/input0
U: Uniq=
H: Handlers=event0 cpufreq keychord 
B: PROP=0
B: EV=3
B: KEY=10 0 3c0000 c0007c010 4000000000 10000 10003010000 787015040408800 1e16c000000000 10000000004ffc

I: Bus=0003 Vendor=0eef Product=c000 Version=0111
N: Name="eGalax Inc. eGalaxTouch P80H80 -1308-06.00.00.00"
P: Phys=usb-fe3e0000.usb-1/input0
S: Sysfs=/devices/platform/fe3e0000.usb/usb2/2-1/2-1:1.0/0003:0EEF:C000.0001/input/input1
U: Uniq=
H: Handlers=cpufreq 
B: PROP=2
B: EV=b
B: KEY=400 0 0 0 0 0
B: ABS=260800000000003

I: Bus=0019 Vendor=0001 Product=0001 Version=0100
N: Name="rk29-keypad"
P: Phys=gpio-keys/input0
S: Sysfs=/devices/platform/rockchip-key/input/input3
U: Uniq=
H: Handlers=event1 keychord 
B: PROP=0
B: EV=3
B: KEY=100000 40008000 1c004000000000 800000000000000

6、Place “eGTouchA.ini” into Android system directory “/data/eGTouchA.ini” where driver would load it.
adb把eGTouchA.ini文件 push进机器的/data/eGTouchA.ini目录。

7、To make eGTouchD driver run from the beginning of system operation. Please put eGTouchD driver into Android system directory “/system/bin”.
adb把eGTouchD文件 push进机器/system/bin目录。

8、[Android 3.0 upwards] Please put file “eGalaxTouch_VirtualDevice.idc” into Android system directory “/system/usr/idc/”
adb把eGalaxTouch_VirtualDevice.idc文件push到机器/system/usr/idc/目录。

【说明】：以上6、7、8的操作可以添加到代码中的device目录，即把这三个文件拷贝到device/rockchip/rk3399/目录，然后修改device.mk文件和在init.tablet.rc文件给eGTouchD赋权限0755：
(我这里遇到个问题就是从windows拷贝这些文件到linux服务器代码上，没有赋权限给文件，编译的时候没法拷贝到对应目录或者拷贝过去了无权限无法运行，这点需要注意一下)

+++ b/device.mk
@@ -44,6 +44,12 @@ PRODUCT_COPY_FILES += \
     $(LOCAL_PATH)/hdcp2_tx:/system/bin/hdcp2_tx \
     $(LOCAL_PATH)/firmware.le:/system/vendor/firmware/hdcp2.fw

+#add by czd for Touch panel:I215FGB01.0 80H80
+PRODUCT_COPY_FILES += \
+    $(LOCAL_PATH)/eGTouchA.ini:/system/etc/eGTouchA.ini \
+    $(LOCAL_PATH)/eGTouchD:/system/bin/eGTouchD \
+    $(LOCAL_PATH)/eGalaxTouch_VirtualDevice.idc:/system/usr/idc/eGalaxTouch_VirtualDevice.idc
+

9、Modify the file“init.rc” in Android system and add service，我这里修改的是device/rockchip/rk3399/init.tablet.rc，这样机器开机之后就会把eGTouchD服务程序运行起来。

+    #add for eGTouchD  by czd 2020-03-05
+    chmod 0755 /system/bin/eGTouchD
+    copy system/etc/eGTouchA.ini /data/eGTouchA.ini
+    chmod 0777  /data/eGTouchA.ini
+    #add end


+service eGTouchD /system/bin/eGTouchD
+       class main
+       user root
+       group root
+       oneshot
+       seclabel u:r:eGTouchD:s0  //这句必须加上

10、解决相关selinux权限的问题（Android5.1以后的安卓版本需要解决）

10.1 修改sepolicy/file_contexts：

+/system/bin/eGTouchD     u:object_r:eGTouchD_exec:s0

10.2 添加sepolicy/eGTouchD.te文件，文件内容如下：

type eGTouchD, domain;
type eGTouchD_exec, exec_type, file_type;


init_daemon_domain(eGTouchD)

allow eGTouchD init_tmpfs:file create_file_perms;
allow eGTouchD self:capability { dac_override net_admin net_raw setgid setuid };
allow eGTouchD device:dir { open read };
allow eGTouchD shell:lnk_file { read };
allow eGTouchD rootfs:lnk_file { getattr };
allow eGTouchD socket_device:sock_file { write };

11、安装apk测试
adb install eGalaxCalibrator_v0.11-usb.apk