合宙4G 模块安卓RIL驱动

模块对于安卓来说就是一个上网的部件，一般客户都还是使用ppp 拨号方式上网的，安卓可以通过ril 来适配不同的模块，其中ril 就需要我们自己开发了，ril 的作用是将安卓下发的命令，转化为AT 和模块进行通信，然后将模块的返回（URC 或者应答）通过不同的通道返回给安卓

####CAT4 源码 
1.安卓2-7 [点击下载](https://oldask.openluat.com/file/attachments-2020-06-IameRuU25ef1cb957cf74_%E5%AE%89%E5%8D%931-7.7z "点击下载")
2.安卓8[点击下载](https://oldask.openluat.com/file/attachments-2020-06-RYR2xgvY5eeddb8906899_%E5%AE%89%E5%8D%938.7z "安卓8")
3.安卓9 [点击下载](https://oldask.openluat.com/file/attachments-2020-06-bHdKyJEB5eeddb0c91ed3_%E5%AE%89%E5%8D%939.rar "安卓9")

#### CAT1 源码
1.安卓2-8 [点击下载](https://oldask.openluat.com/file/attachments-2020-06-LEs1bgZH5eeddafda3d1c_RIL_trunk_8910_%E5%AE%89%E5%8D%931-8.7z "安卓1-8")

##一、 LINUX内核修改
###1. Add VID add PID
File: [KERNEL]/drivers/usb/serial/option.c
```c
static const struct usb_device_id option_ids[] = {
 //+add by airm2m for Air72x
	{ USB_DEVICE(0x1782, 0x4e00) }, /* CAT1 系列*/
 { USB_DEVICE(0x1286, 0x4e3d) }, /* CAT4 系列*/
 //-add by airm2m for Air72x
 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_COLT) },
 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_RICOLA) },
 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_RICOLA_LIGHT) },
 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_RICOLA_QUAD) },
 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_RICOLA_QUAD_LIGHT) }, 
```

###2. Add the Zero Packet Mechanism 
⦁For linux Kernel Version newer than 2.6.34：
 File: [KERNEL]/drivers/usb/serial/usb_wwan.c
```c
static struct urb *usb_wwan_setup_urb(struct usb_serial_port *port,
 int endpoint, 
 int dir, void *ctx, char *buf, int len,
 void (*callback) (struct urb *))
{
 struct usb_serial *serial = port->serial;
 struct urb *urb;
 urb = usb_alloc_urb(0, GFP_KERNEL); /* No ISO */
 if (!urb)
 return NULL;
 usb_fill_bulk_urb(urb, serial->dev,
 usb_sndbulkpipe(serial->dev, endpoint) | dir,
 buf, len, callback, ctx);
 //+add by airm2m for Air72x
 if(dir == USB_DIR_OUT){
 struct usb_device_descriptor *desc = &serial->dev->descriptor;
 if(desc->idVendor == cpu_to_le16(0x1286) && desc->idProduct == cpu_to_le16(0x4e3d)) 
 {
			/* CAT4 系列*/
 urb->transfer_flags |= URB_ZERO_PACKET;
 }
		 if(desc->idVendor == cpu_to_le16(0x1782) && desc->idProduct == cpu_to_le16(0x4e00))
 {
		/* CAT1 系列*/
 urb->transfer_flags |= URB_ZERO_PACKET;
 }
 }
 //-add by airm2m for Air72x
 return urb;
}
```
⦁For linux Kernel Version older than 2.6.35：
File: [KERNEL]/drivers/usb/serial/option.c
```c
static struct urb *option_setup_urb(struct usb_serial *serial, int endpoint,
int dir, void *ctx, char *buf, int len,
void (*callback)(struct urb *))
{
......
/* Fill URB using supplied data. */
usb_fill_bulk_urb(urb, serial->dev,
 usb_sndbulkpipe(serial->dev, endpoint) | dir,
 buf, len, callback, ctx);
//+add by airm2m for Air72x
if(dir == USB_DIR_OUT)
{
 struct usb_device_descriptor *desc = &serial->dev->descriptor;
 if(desc->idVendor == cpu_to_le16(0x1286) && desc->idProduct == cpu_to_le16(0x4e3d)) 
 {
			/* CAT4 系列*/
 urb->transfer_flags |= URB_ZERO_PACKET;
 }
		if(desc->idVendor == cpu_to_le16(0x1782) && desc->idProduct == cpu_to_le16(0x4e00))
 {
			/* CAT1 系列*/
 urb->transfer_flags |= URB_ZERO_PACKET;
 }
}
//-add by airm2m for Air72x
return urb;
}
```
 ###3. Add Reset Resume
⦁For linux Kernel Version newer than 3.4：
File: [KERNEL]/drivers/usb/serial/option.c
```c
static struct usb_serial_driver option_1port_device = {
 .driver = { 
 .owner = THIS_MODULE,
 .name = "option1",
 }, 
#ifdef CONFIG_PM
 .suspend = usb_wwan_suspend,
 .resume = usb_wwan_resume,
#endif
 //+add by airm2m for Air720
 .reset_resume = usb_wwan_resume,
 //-add by airm2m for Air720
};
```
⦁For linux Kernel Version older than 3.5：
File: [kernel]/drivers/usb/serial/usb-serial.c
```c
/* Driver structure we register with the USB core */
static struct usb_driver usb_serial_driver = {
.name ="usbserial",
.probe =usb_serial_probe,
.disconnect =usb_serial_disconnect,
.suspend =usb_serial_suspend,
.resume =usb_serial_resume,
 //+add by airm2m for Air72x
 .reset_resume = usb_serial_resume,
 //-add by airm2m for Air72x
.no_dynamic_id = 1,
};
```
###4. Modify Kernel Configuration
####Step 1：
```bash
 cd <your kernel directory>
```
#### Step 2：
 ```bash
 make menuconfig
```
#### Step 3：Enable CONFIG_USB_SERIAL_OPTION
```bash
[*] Device Drivers →
　　[*] USB Support →
　　　　[*] USB Serial Converter support →
　　　　　　[*] USB driver for GSM and CDMA modems
```
![](http://ask.openluat.com/image/show/attachments-2018-09-UvLI6qjo5b8b7c3fabe04.png)

####    Step 4：Configure Kernel to Support PPP
```bash
[*] Device Drivers →
　　[*] Network device support →
　　　　[*] PPP (point-to-point protocol) support
```

![](http://ask.openluat.com/image/show/attachments-2018-09-0MkDlKPS5b8b7cde500a3.png)

###5.编译内核
```bash
make    
```
将编译好的内核下载到开发板。

##二、android修改和编译
###1. 请将附件中的代码包(reference-ril_release_1115.tar.gz)下载并解压缩。
###2. 将解压后的refrence-ril目录下的所有文件覆盖到android代码的hardware/ril/refrence-ril目录下
###3. 在rild.c文件中， 注释掉 switchUser(); 这一行代码。
###4. 输入touch hardware/ril/* 强制让ril目录下所有的文件参与编译
###5. 开始编译android

##三、配置
###1. 在init.rc文件中加入如下代码：
#####32位android系统
```bash
# ril related services
service ril-daemon /system/bin/rild -l /system/lib/libreference-ril.so         class main
            socket rild stream 660 root radio
            socket rild-debug stream 660 radio system
            user root
```
#####64位android系统
```bash
#ril related services
service ril-daemon /system/bin/rild -l /system/lib64/libreference-ril.so         class main
            socket rild stream 660 root radio
            socket rild-debug stream 660 radio system
            user root
```
###2. 如果您使用的是物联网卡（比如46004的SIM卡），可能需要在apns-conf.xml中添加相应的APN
###3. 对于android5.0及以上的版本，需要对SELinux相关的配置文件做如下改动：
####1). 在external/sepolicy/file_contexts文件中加入以下代码:
```bash
/dev/ttyUSB[0-9]* u:object_r:tty_device:s0
/system/bin/rild u:object_r:rild_exec:s0
/system/socket/rild u:object_r:rild_socket:s0
/system/socket/rild-debug u:object_r:rild_debug_socket:s0
/system/bin/pppd u:object_r:pppd_exec:s0
/dev/ppp u:object_r:ppp_device:s0
```
####2).在external/sepolicy/rild.te文件中加入以下代码：
```bash
allow rild default_prop:property_service set;
allow rild device:chr_file { read write ioctl open getattr };
allow rild kernel:system  module_request;
allow rild net_radio_prop:property_service set;
allow rild ppp_device:chr_file { read write ioctl open };
allow rild ppp_exec:file { read execute open execute_no_trans };
allow rild radio_prop:property_service set;
allow rild self:capability { net_admin setuid };
allow rild shell_exec:file { read execute open execute_no_trans };
allow rild sysfs_wake_lock:file { open read write };
allow rild system_file:file execute_no_trans;
allow rild system_prop:property_service set;
```
####3).修改external/sepolicy/domain.te（也有可能在其他位置，具体请咨询方案商)
```bash
neverallow { domain -unconfineddomain -ueventd -recovery -busybox } device:chr_file { open read write };
```
改成：
```bash
neverallow { domain -unconfineddomain -ueventd -recovery -busybox -rild } device:chr_file { open read write };
```
#####请注意：每个厂商提供的domain.te不一定如上所示。找到类似于neverallow {domain -XXXX -XXXX -XXXX} device:chr_file { open read write };格式的地方，加上-rild即可

##四、调试
###如果在调试过程中遇到了问题，我们可能需要您提供相关的LOG。
###使用adb工具抓取相应的LOG的方法：
####1. 使用命令 adb logcat –b radio –v time ，可以将LOG显示在命令行窗口
####2. 在linux/windows+cygwin环境下，可以使用命令 adb logcat –b radio –v time > 本地文件，将LOG输出到本地目录。

发表于 2020-06-20 17:54
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