调试前先找模块厂获取相关资料

Kernel修改：

1. 供电引脚，我是自己写的驱动供电，也可用RK的参考配置来控制，把原理图对应角位配置上就行。

rk_modem: rk-modem {
compatible="4g-modem-platdata";
pinctrl-names = "default";
pinctrl-0 = <<e_vbat <e_power_en <e_reset>;
4G,vbat-gpio = <&gpio4 RK_PD0 GPIO_ACTIVE_HIGH>;
4G,power-gpio = <&gpio4 RK_PC6 GPIO_ACTIVE_LOW>;
4G,reset-gpio = <&gpio4 RK_PD4 GPIO_ACTIVE_LOW>;
status = "okay";
};

2. 添加模块VID,PID

kernel-5.10：
--- a/drivers/usb/serial/option.c
+++ b/drivers/usb/serial/option.c
@@ -97,6 +97,18 @@ static void option_instat_callback(struct urb *urb);#define YISO_VENDOR_ID                         0x0EAB#define YISO_PRODUCT_U893                      0xC893+/* Fibocom products */
+#define FIBOCOM_VENDOR_ID                      0x2cb7
+#define FIBOCOM_PRODUCT_L71X           0x0001
+
+#define FIBOCOM_USB_VENDOR_AND_INTERFACE_INFO(vend, cl, sc, pr) \
+.match_flags = USB_DEVICE_ID_MATCH_INT_INFO \
+| USB_DEVICE_ID_MATCH_VENDOR, \
+.idVendor = (vend), \
+.bInterfaceClass = (cl), \
+.bInterfaceSubClass = (sc), \
+.bInterfaceProtocol = (pr)
+/** NOVATEL WIRELESS PRODUCTS*
@@ -1873,6 +1885,11 @@ static const struct usb_device_id option_ids[] = {{ USB_VENDOR_AND_INTERFACE_INFO(ZTE_VENDOR_ID, 0xff, 0x02, 0x05) },{ USB_VENDOR_AND_INTERFACE_INFO(ZTE_VENDOR_ID, 0xff, 0x86, 0x10) },+       { FIBOCOM_USB_VENDOR_AND_INTERFACE_INFO(FIBOCOM_VENDOR_ID, 0xff, 0xff, 0xff) },
+       { FIBOCOM_USB_VENDOR_AND_INTERFACE_INFO(FIBOCOM_VENDOR_ID, 0x0a, 0x00, 0xff) },
+       { USB_DEVICE_AND_INTERFACE_INFO(0x19d2, 0x0256, 0xff, 0xff, 0xff) },
+       { USB_DEVICE_AND_INTERFACE_INFO(0x19d2, 0x0579, 0xff, 0xff, 0xff) },
+{ USB_DEVICE(BENQ_VENDOR_ID, BENQ_PRODUCT_H10) },{ USB_DEVICE(DLINK_VENDOR_ID, DLINK_PRODUCT_DWM_652) },{ USB_DEVICE(ALINK_VENDOR_ID, DLINK_PRODUCT_DWM_652_U5) }, /* Yes, ALINK_VENDOR_ID */
@@ -2188,6 +2205,16 @@ static int option_probe(struct usb_serial *serial,if (iface_desc->bInterfaceClass == USB_CLASS_MASS_STORAGE)return -ENODEV;+       if(serial->dev->descriptor.idVendor == FIBOCOM_VENDOR_ID &&
+               serial->dev->descriptor.idProduct == FIBOCOM_PRODUCT_L71X &&
+               serial->interface->cur_altsetting->desc.bInterfaceClass == 0x7)
+               return -ENODEV;
+
+       if(serial->dev->descriptor.idVendor == ZTE_VENDOR_ID &&
+               serial->dev->descriptor.idProduct == 0x0579 &&
+               serial->interface->cur_altsetting->desc.bInterfaceClass == 0x6)
+               return -ENODEV;
+/** Don't bind reserved interfaces (like network ones) which often have* the same class/subclass/protocol as the serial interfaces.  Look at

3. 内核编译配置项

平台已默认打开配置，按如下配置在检查下

CONFIG_PPP=y
CONFIG_PPP_MULTILINK=y
CONFIG_PPP_FILTER=y
CONFIG_PPP_ASYNC=y
CONFIG_PPP_SYNC_TTY=y
CONFIG_PPP_DEFLATE=y
CONFIG_PPP_BSDCOMP=y

4. 以上修改完成后编译烧录进机器查看是否生成对应设备

console:/ # lsusb                                                              
Bus 006 Device 003: ID 2cb7:0001console:/ # ifconfig  
eth1      Link encap:Ethernet  HWaddr 34:4b:50:00:00:00  Driver cdc_etherUP BROADCAST MULTICAST  MTU:1500  Metric:1RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:0 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:0 TX bytes:0 console:/ # ls /dev/ttyUSB*                                                    
/dev/ttyUSB0  /dev/ttyUSB1  /dev/ttyUSB2  /dev/ttyUSB3

5. 问题排查：

如未生成对应节点先排查供电是否正常。

在排查主控对应USB phy节点是否打开

模块需保证 VBUS 信号连接到 5V 供电，若此信号悬空，USB 口无法正常枚举

Android修改：

1.启动ril进程

hardware/ril
--- a/rild/rild.rc
+++ b/rild/rild.rc
@@ -1,5 +1,6 @@
-service vendor.ril-daemon /vendor/bin/hw/rild
+service ril-daemon /vendor/bin/hw/rild -l /vendor/lib64/libreference-ril-l716.soclass main
-    user radio
-    group radio cache inet misc audio log readproc wakelock
-    capabilities BLOCK_SUSPEND NET_ADMIN NET_RAW
+    socket rild stream 660 root radio
+    socket rild-debug stream 660 radio system
+    user root
+    group radio cache inet misc audio sdcard_rw log启动rild进程加载对应ril库
-l 指定 RIL 库加载路径

2.打开系统4G服务

device/rockchip/common/BoardConfig.mk
BOARD_HAS_RK_4G_MODEM ?= true

3.打开BOARD_HAS_RK_4G_MODEM选项后会有一些报错，添加如下补丁：（如打开宏没有报错不用添加下面补丁，rk3568可以直接编译，目前发现rk3588 android12会报错）

/vendor/rockchip/common：
--- a/phone/phone.mk
+++ b/phone/phone.mk
@@ -26,8 +26,8 @@ PRODUCT_PACKAGES += \chatPRODUCT_PROPERTY_OVERRIDES +=ro.boot.noril=false
-else
-PRODUCT_PROPERTY_OVERRIDES +=ro.boot.noril=true
+# else
+# PRODUCT_PROPERTY_OVERRIDES +=ro.boot.noril=trueendif

/device/rockchip/common：
--- a/modules/4g_modem.mk
+++ b/modules/4g_modem.mk
@@ -38,8 +38,8 @@ PRODUCT_PROPERTY_OVERRIDES += \vendor.rild.libpath=/vendor/lib64/librk-ril.soPRODUCT_COPY_FILES += \
-    $(LOCAL_PATH)/4g_modem/bin64/dhcpcd:$(TARGET_COPY_OUT_VENDOR)/bin/dhcpcd \
-    $(LOCAL_PATH)/4g_modem/lib64/librk-ril.so:$(TARGET_COPY_OUT_VENDOR)/lib64/librk-ril.so
+    $(LOCAL_PATH)/../4g_modem/bin64/dhcpcd:$(TARGET_COPY_OUT_VENDOR)/bin/dhcpcd \
+    $(LOCAL_PATH)/../4g_modem/lib64/librk-ril.so:$(TARGET_COPY_OUT_VENDOR)/lib64/librk-ril.so

hardware/interfaces：
--- a/compatibility_matrices/compatibility_matrix.6.xml
+++ b/compatibility_matrices/compatibility_matrix.6.xml
@@ -434,6 +434,11 @@android.hardware.radio
+        1.1
+        1.2
+        1.3
+        1.4
+        1.51.6IRadio
@@ -450,11 +455,20 @@slot1
+    
+       android.hardware.radio.deprecated
+        1.0
+        
+        IOemHook
+        slot1
+        
+        android.hardware.radio.config
+        1.01.1IRadioConfig

4.添加模块厂提供ril库编译并指定ril库路径

所需文件：libreference-ril-l716.so

ght_ril_config.ini

将文件拷贝到/device/rockchip/common/lib64目录

添加如下代码拷贝到系统

/device/rockchip/common：
--- a/modules/4g_modem.mk
+++ b/modules/4g_modem.mk
@@ -35,11 +35,12 @@ DEVICE_MANIFEST_FILE += device/rockchip/common/4g_modem/manifest.xmlifeq ($(strip $(TARGET_ARCH)), arm64)PRODUCT_PROPERTY_OVERRIDES += \
-    vendor.rild.libpath=/vendor/lib64/librk-ril.so
+    vendor.rild.libpath=/vendor/lib64/libreference-ril-l716.soPRODUCT_COPY_FILES += \
-    $(LOCAL_PATH)/4g_modem/bin64/dhcpcd:$(TARGET_COPY_OUT_VENDOR)/bin/dhcpcd \
-    $(LOCAL_PATH)/4g_modem/lib64/librk-ril.so:$(TARGET_COPY_OUT_VENDOR)/lib64/librk-ril.so
+    $(LOCAL_PATH)/../4g_modem/bin64/dhcpcd:$(TARGET_COPY_OUT_VENDOR)/bin/dhcpcd \
+    $(LOCAL_PATH)/../4g_modem/lib64/libreference-ril-l716.so:$(TARGET_COPY_OUT_VENDOR)/lib64/libreference-ril-l716.so \
+    $(LOCAL_PATH)/../4g_modem/lib64/ght_ril_config.ini:system/etc/ght_ril_config.inielsePRODUCT_PROPERTY_OVERRIDES += \vendor.rild.libpath=/vendor/lib/librk-ril.so

5.修改模块所需prop属性

device/rockchip/rk3588：
--- a/device.mk
+++ b/device.mk
@@ -82,6 +82,9 @@ PRODUCT_PROPERTY_OVERRIDES += \ro.ril.ecclist=112,911 \ro.opengles.version=196610 \wifi.interface=wlan0 \
+                rild.libargs=-d /dev/ttyUSB2 \
+                ril.fibocom.dialmode=1 \
+                ril.fibocom.NetifName=eth1 \
参数说明：
rild.libargs  AT指令端口，可询问模块厂或向端口发送AT指令可得知，一般只ttyUSB1 ttyUSB2
ril.fibocom.dialmode   拨号模式    / 0 ： ppp 拨号， 1 ： ECM 拨号 推荐使用ECM
ril.fibocom.NetifName   自定义拨号网卡，根据实际生成网卡填写

6.编译Android烧录

7.编译完成后查看系统属性是否已经设置成功

console:/ # getprop | grep ril                                                 
[init.svc.ril-daemon]: [running]
[init.svc_debug_pid.ril-daemon]: [505]
[ril.currentapntype]: [default]
[ril.fibocom.NetifName]: [eth1]
[ril.fibocom.dialmode]: [1]
[ril.fibocom.version]: [Fibocom_RIL_V12X.06.V1.0.7]
[ril.function.dataonly]: [1]
[rild.libargs]: [-d]
[ro.boot.noril]: [false]
[ro.boottime.ril-daemon]: [5861295027]
[ro.ril.ecclist]: [112,911]
[vendor.rild.libpath]: [/vendor/lib64/libreference-ril-l716.so]

7.1查看rild进程是否启动

console:/ # ps -ef | grep rild
root           505     1 0 10:03:39 ?     00:00:00 rild -l /vendor/lib64/libreference-ril-l716.so
root         19667  2210 3 10:43:59 ttyFIQ0 00:00:00 grep rild

7.2插入sim卡检测

输入AT指令到对应端口号查看是否检测到SIM卡

echo "AT+CPIN?" > /dev/ttyUSB2
cat /dev/ttyUSB2
CPIN: READY

7.3查看eth1节点是否获取到ip

7.4 ping网络测试

如有问题请确认ril库是否对应模块及Android版本，系统是否已经加载上了ril库

adb logcat –b radio –v time 抓取Log给模块厂帮忙分析。