/**************************************************************************
* I.MX6 Android U-blox miniPCI 4G porting
* 声明：
* 在移植U-blox的4G模块的过程中遇到了不少的问题，有不少是自己的这边疏忽
* 的问题，无论怎么说，问题解决了就行。
*
* 2016-1-11 深圳 南山平山村 曾剑锋
*************************************************************************/
一、参考文档：
1. 飞思卡尔i.MX 6Quad Android 4.0.4的3G驱动移植
http://blog.csdn.net/xnwyd/article/details/9498235
2. 关于 android RIL 调试
http://blog.lytsing.org/archives/476.html
二、ublox设备miniPCI识别到的设备节点：
1. 只有一个: /dev/ttyACM0.
2. 原因如下：
the USB mode of MPCI-L210 module in "RNDIS" mode, so it will only create one and only one ttyACM0 node. If you need to use ttyACM0, ttyACM1 and ttyACM2. please execute following command:
// Set USB configuration to "fairly back-compatible" and disable the audio over USB.
1. AT+UUSBCONF=0,””,0
// It need reboot the module.
2. AT+CFUN=16
// this command will reboot the module, or you can reboot device instead of.
3. AT+UUSBCONF?
For more detail description, please check attach file(AT-CommandExample), chapter 22 USB profile configuration.
三、重新配置ublox：
1. 参考《AT Commands Examples Examples for u-blox cellular modules Application Note》;
2. chapter 22 USB profile configuration: Fairly back-compatible profile
This is the configuration (<id>=0) similar to the one implemented in the u-blox LISA-U series. The interfaces available are:
1. 3 CDC-ACM for AT command and data
2. 1 CDC-ACM for GNSS tunnelling
3. 1 CDC-ACM for SIM Access profile (SAP)
4. 1 CDC-ACM for diagnostic
This configuration is identified by:
VID = 0x1546
PID = 0x1141
省略后面的命令说明...
3. 使用串口工具，对ublox进行配置，我使用的是自己之前写的命令行的串口工具，参考：《I.MX6 Android Linux UART send receive with multi-thread and multi-mode demo》
root@android:/data/local # ./autorun.sh
serialString : /dev/ttyACM0.
baudRate 9600.
workMode: send and recv.
AT+UUSBCONF=0,"",0
OK
4. dmesg信息提示如下：
......
usb 2-1.4: new high speed USB device number 3 using fsl-ehci
imx-ipuv3 imx-ipuv3.0: IPU DMFC DP HIGH RESOLUTION: 1(0,1), 5B(2~5), 5F(6,7)
cdc_acm 2-1.4:1.0: This device cannot do calls on its own. It is not a modem.
cdc_acm 2-1.4:1.0: ttyACM0: USB ACM device
cdc_acm 2-1.4:1.2: This device cannot do calls on its own. It is not a modem.
cdc_acm 2-1.4:1.2: ttyACM1: USB ACM device
cdc_acm 2-1.4:1.4: This device cannot do calls on its own. It is not a modem.
cdc_acm 2-1.4:1.4: ttyACM2: USB ACM device
cdc_acm 2-1.4:1.6: This device cannot do calls on its own. It is not a modem.
cdc_acm 2-1.4:1.6: ttyACM3: USB ACM device
cdc_acm 2-1.4:1.8: This device cannot do calls on its own. It is not a modem.
cdc_acm 2-1.4:1.8: ttyACM4: USB ACM device
cdc_acm 2-1.4:1.10: This device cannot do calls on its own. It is not a modem.
cdc_acm 2-1.4:1.10: ttyACM5: USB ACM device
......
5. 厂家的FAE说上面的错误可以不用关心
This device cannot do calls on its own. It is not a modem.
四、配置Android系统：
1. 参考文档：《Android RIL Production delivery – Source code Application Note》
2. 参考章节：Appendix - D Android 4.1/ 4.2 / 4.3 / 4.4 module configuration
To enable the USB module connection, configure Ueventd.[platform].rc, AndroidProducts.mk and init.rc files as described in sections below. Before changing the files, below are some necessary steps to follow.
五、Error：
1. Error1：
1. 出错信息：
init: cannot execve('/system/bin/uril-repo.sh'): No such file or directory
2. 查看uril-repo.sh文件：busybox vi uril-repo.sh
#!/system/bin/sh^M
^M
URIL_REPO_DST=/data/uril/repository.txt^M
^M
rril_repo_missing=`ls $URIL_REPO_DST`true^M
^M
if (${rril_repo_missing}) ; then^M
mkdir /data/uril^M
chmod 0770 /data/uril^M
cat /etc/uril/repository.txt > $URIL_REPO_DST^M
chmod 0660 $URIL_REPO_DST^M
sync^M
/system/bin/log -t RIL-repo "created $URIL_REPO_DST"^M
else^M
/system/bin/log -t RIL-repo "$URIL_REPO_DST exists"^M
fi^M
^M
# set this property after checking that repository exists or after it's created^
# This is checked in rildmain mainloop during RIL_Init^M
/system/bin/setprop "net.uril.repository" "ready"^M
^M
# set this property to configure emergency number if required^M
#/system/bin/setprop "ril.ecclist" "111,112,113,115,117,118,119,122,125,127,911,
- uril-repo.sh 1/25 4%
3. 通过查看文件，发现其中的每行最后都多出了^M这个字符，貌似这个文件是在Windows上面编辑的。
4. 删除这些^M。
5. 但是这个字符在Ubuntu、Vim中都看不到，这貌似有点奇怪。
6. 有点忧伤的地方在于U-Blox提供的etc下的配置文件都是这种文件，他们提供错了文档。
2. Error2:
1. adb logcat -v time -b radio > logcat_info.txt
2. 错误信息：
01-01 00:00:05.570 I/RIL ( 2286): 3G modem monitor thread is start
01-01 00:00:05.570 E/RILD ( 2286): dlopen failed: Cannot load library: load_library(linker.cpp:745): library "/system/lib/libhuawei-ril.so" not found
01-01 00:00:05.620 I/RIL-repo( 2348): created /data/uril/repository.txt
01-01 00:00:10.100 E/RILD ( 2604): dlopen failed: Cannot load library: load_library(linker.cpp:745): library "/system/lib/libhuawei-ril.so" not found
......
3. cat hardware/ril/rild/rild.c
......
// #define REFERENCE_RIL_DEF_PATH "/system/lib/libhuawei-ril.so"
......
int main(int argc, char **argv)
{
......
switch (modem_type){
case ZTE_MODEM:
rilLibPath = REFERENCE_RIL_ZTE_PATH;
break;
case HUAWEI_MODEM:
case AMAZON_MODEM:
default:
rilLibPath = REFERENCE_RIL_DEF_PATH;
break;
}
......
}
4. 修改REFERENCE_RIL_DEF_PATH的值为：
"/system/lib/librapid-ril-core.so"
5. 根据rild.c中代码的运行流程可知，命令行中的-l参数是无效。
3. 能够获取GSM信号，但无法获取网络数据：
1. 模块问题检查：
root@android:/data/local # ./autorun.sh
CMD: AT+UUSBCONF?.
+UUSBCONF: 3,"RNDIS",,"0x1146"
OK
CMD: AT+UUSBCONF=0,"",0.
OK
CMD: AT+CFUN=16.
usb 2-1.4: USB disconnect, device number 32
usb 2-1.4: new high speed USB device number 33 using fsl-ehci
usb 2-1.4: USB disconnect, device number 33
usb 2-1.4: new high speed USB device number 34 using fsl-ehci
cdc_acm 2-1.4:1.0: This device cannot do calls on its own. It is not a modem.
cdc_acm 2-1.4:1.0: ttyACM0: USB ACM device
cdc_acm 2-1.4:1.2: This device cannot do calls on its own. It is not a modem.
cdc_acm 2-1.4:1.2: ttyACM1: USB ACM device
cdc_acm 2-1.4:1.4: This device cannot do calls on its own. It is not a modem.
cdc_acm 2-1.4:1.4: ttyACM2: USB ACM device
cdc_acm 2-1.4:1.6: This device cannot do calls on its own. It is not a modem.
cdc_acm 2-1.4:1.6: ttyACM3: USB ACM device
cdc_acm 2-1.4:1.8: This device cannot do calls on its own. It is not a modem.
cdc_acm 2-1.4:1.8: ttyACM4: USB ACM device
cdc_acm 2-1.4:1.10: This device cannot do calls on its own. It is not a modem.
cdc_acm 2-1.4:1.10: ttyACM5: USB ACM device
CMD: AT+UUSBCONF?.
+UUSBCONF: 0,"",,"0x1141"
OK
usb 2-1.4: USB disconnect, device number 34
usb 2-1.4: new high speed USB device number 35 using fsl-ehci
usb 2-1.4: USB disconnect, device number 35
usb 2-1.4: new high speed USB device number 36 using fsl-ehci
cdc_acm 2-1.4:1.2: This device cannot do calls on its own. It is not a modem.
cdc_acm 2-1.4:1.2: ttyACM0: USB ACM device
CMD: AT+UUSBCONF?.
AT+UUSBCONF?
+UUSBCONF: 3,"RNDIS",,"0x1146"
OK
ATE0V1
OK
2. 从1中可以看出：
将模块设置为Fairly back-compatible模式的时候，移植的系统又会自动将模块
重置为High throughput模式，无法稳定工作在Fairly back-compatible模式。
3. 原因是 "hardware/ril/ublox_ril/CORE/ND/systemmanager.cpp” 的 1729 行.
4. 解决办法：
1. 参考《AndroidRIL-SourceCode_AppNote.pdf》中"章节 I, Repository file configuration".
2. cat build/target/product/rootdir/etc/uril/repository.txt
......
// Modem settings
Group Modem
SupportedModem UbloxModem
//NetworkInterfaceName USB // 修改为ppp
NetworkInterfaceName ppp
DisableModemReset 0
......
// USB Profile Configuration
Group USBUBM
// 将RNDIS模式修改为CDC-ACM模式
// USBCONF 3 // 0: CDC-ACM, 2: CDC-ECM, 3: RNDIS
USBCONF 0 // 0: CDC-ACM, 2: CDC-ECM, 3: RNDIS
UBMCONF 1 // 1: Router, 2: Bridge
......
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