RK3399 4G模块移远EC20移植调试

CPU：RK3399

系统：Android 7.1

通过串口打印或者adb获取模块的 pid 和 vid，顺便可以看到生成 4 个虚拟串口 /dev/ttyUSB*

[   11.734379] usb 1-1.1: new high-speed USB device number 3 using ehci-platfORM

[   11.828247] usb 1-1.1: New USB device found, idVendor=2c7c, idProduct=0125

[   11.828386] usb 1-1.1: New USB device strings: Mfr=1, Product=2, SerialNumber=0

[   11.828413] usb 1-1.1: Product: Android

[   11.828436] usb 1-1.1: Manufacturer: Android

[   11.835480] option 1-1.1:1.0: GSM modem (1-port) converter detected

[   11.841217] usb 1-1.1: GSM modem (1-port) converter now attached to ttyUSB0

[   11.844988] option 1-1.1:1.1: GSM modem (1-port) converter detected

[   11.851892] usb 1-1.1: GSM modem (1-port) converter now attached to ttyUSB1

[   11.853964] option 1-1.1:1.2: GSM modem (1-port) converter detected

[   11.864677] usb 1-1.1: GSM modem (1-port) converter now attached to ttyUSB2

[   11.865658] option 1-1.1:1.3: GSM modem (1-port) converter detected

[   11.871387] usb 1-1.1: GSM modem (1-port) converter now attached to ttyUSB3

在代码中添加模块的 pid 和 vid，原始代码中已经包含移远的几个模块，仿照现有的添加 EC20

diff --git a/kernel/drivers/usb/serial/option.c b/kernel/drivers/usb/serial/option.c

index 1799aa0..f6c9e5d 100644

--- a/kernel/drivers/usb/serial/option.c

+++ b/kernel/drivers/usb/serial/option.c

@@ -241,6 +241,7 @@ static void option_instat_callback(struct urb *urb);

 #define QUECTEL_VENDOR_ID                      0x2c7c

+#define QUECTEL_PRODUCT_EC20                   0x0125

 #define QUECTEL_PRODUCT_EC21                   0x0121

 #define QUECTEL_PRODUCT_EC25                   0x0125

 #define QUECTEL_PRODUCT_BG96                   0x0296

@@ -1200,6 +1201,8 @@ static const struct usb_device_id option_ids[] = {

        { USB_DEVICE(QUALCOMM_VENDOR_ID, YUGA_PRODUCT_CLM920_NC5),

          .driver_info = (kernel_ulong_t)&yuga_clm920_nc5_blacklist },

+       { USB_DEVICE(QUECTEL_VENDOR_ID, QUECTEL_PRODUCT_EC20),

+         .driver_info = (kernel_ulong_t)&net_intf4_blacklist },

        { USB_DEVICE(QUECTEL_VENDOR_ID, QUECTEL_PRODUCT_EC21),

          .driver_info = (kernel_ulong_t)&net_intf4_blacklist },

        { USB_DEVICE(QUECTEL_VENDOR_ID, QUECTEL_PRODUCT_EC25)

添加模块的 so 库，此库需要移远提供，so 支持的系统要匹配，将 so 库拷贝到下面的路径

vendor/rockchip/common/phone/lib/libreference-ril.so

打开 device/rockchip/common/device.mk 文件，修改 rild.libpath 路径为 rild.libpath=/system/lib64/libreference-ril.so

diff --git a/device/rockchip/common/device.mk b/device/rockchip/common/device.mk

index be2cb2c..69034a7 100755

--- a/device/rockchip/common/device.mk

+++ b/device/rockchip/common/device.mk

@@ -699,7 +699,7 @@ endif

 ifeq ($(strip $(BOARD_HAVE_DONGLE)),true)

 ifeq ($(strip $(TARGET_ARCH)), arm64)

 PRODUCT_PROPERTY_OVERRIDES += \

-    rild.libpath=/system/lib64/libril-rk29-dataonly.so

+    rild.libpath=/system/lib64/libreference-ril.so

 else

 PRODUCT_PROPERTY_OVERRIDES += \

     rild.libpath=/system/lib/libril-rk29-dataonly.so

因为 rk3399 是64位 CPU，所以 ifeq ($(strip $(TARGET_ARCH)), arm64) 条件成立。

但是前提都是 BOARD_HAVE_DONGLE 变量值为 true

注：本人测试，修改下面两个文件中的 rild.libpath 不起作用

device/rockchip/rk3399/system.prop

device/rockchip/rk3399/rk3399_all/system.prop

编译时将 so 库拷贝到上面指定目录 /system/lib64/libreference-ril.so

diff --git a/vendor/rockchip/common/phone/phone.mk b/vendor/rockchip/common/phone/phone.mk

index 946aacd..f8fc6e7 100755

--- a/vendor/rockchip/common/phone/phone.mk

+++ b/vendor/rockchip/common/phone/phone.mk

@@ -8,7 +8,8 @@ PRODUCT_COPY_FILES += \

     $(CUR_PATH)/phone/etc/ppp/ip-down:system/etc/ppp/ip-down \

     $(CUR_PATH)/phone/etc/ppp/ip-up:system/etc/ppp/ip-up \

     $(CUR_PATH)/phone/etc/ppp/call-pppd:system/etc/ppp/call-pppd \

-    $(CUR_PATH)/phone/etc/operator_table:system/etc/operator_table

+    $(CUR_PATH)/phone/etc/operator_table:system/etc/operator_table \

+    $(CUR_PATH)/phone/lib/libreference-ril.so:system/lib64/libreference-ril.so

 ifeq ($(strip $(PRODUCT_MODEM)), DTS4108C)

 PRODUCT_COPY_FILES += \

设置 BOARD_HAVE_DONGLE 变量

diff --git a/device/rockchip/rk3399/rk3399_all.mk b/device/rockchip/rk3399/rk3399_all.mk

index 7a2d870..ce5060c 100755

--- a/device/rockchip/rk3399/rk3399_all.mk

+++ b/device/rockchip/rk3399/rk3399_all.mk

@@ -63,7 +63,7 @@ BOARD_NFC_SUPPORT := false

 BOARD_HAS_GPS := false

 #for 3G/4G modem dongle support

-BOARD_HAVE_DONGLE := false

+BOARD_HAVE_DONGLE := true

 BOARD_GRAVITY_SENSOR_SUPPORT := true

此时移植完成，只要 so 库没问题，就可以正常上网。

如果 radio log 中打印如下信息：

RIL_SAP_Init not defined or exported in /system/lib64/libril-rk29-dataonly.so

检查 rild.libpath 的路径和名称是否正确。

No /proc/cmdline exception=java.io.FileNotFoundException: /proc/cmdline (Permission denied)

此报错不影响联网，可以忽略