rk3399添加EC25E/EC20...模组
搞来搞去搞了很久，差点放弃走人的时候，发现竟然是这点事。。。辛酸史如下：
android6.01-----kernel4.4.36-----编译环境ubuntu16.04
一、kernel driver
内核有4种驱动方式，usb serial、CDC ACM、Gobinet、QMI WWAN，本文选用的是usb serial和QMI WWAN两种驱动。
1.usb serial
（1）添加模组的PID/VID。
/kernel/driver/usb/serial/option.c
如果，你添加的是EC20。那么，注释掉以下代码，避免型号冲突。
/kernel/driver/usb/serial/qcserial.c
{USB_DEVICE(0x05c6, 0x9215)}, /* Acer Gobi 2000 Modem device (VP413) *//kernel/driver/net/usb/qmi_wwan.c
{QMI_GOBI_DEVICE(0x05c6, 0x9215)}, /* Acer Gobi 2000 Modem device (VP413) */此时，在/dev/下可以找到ttyUSB0/ttyUSB1/ttyUSB2/ttyUSB3设备节点
(2)添加零包机制
根据 USB 协议的要求, 需要添加在批量输出传输过程中处理零数据包的机制。
/kernel/drivers/usb/serial/usb_wwan.c
(3)添加重置回调
当 MCU 进入挂起状态时, 某些 USB 主机控制器/集线器将断电或重置模式, 并且在 MCU 退出挂起/休眠模式后, 它们无法恢复 USB 设备。添加以下语句, 以启用重新安置过程。
/kernel/drivers/usb/serial/option.c
(4)如果使用Gobinet、QMI WWAN驱动
/kernel/drivers/usb/serial/option.c
（5）添加内核模块
[*] Device Driver
[*]USB Support
[*]USB Serial Converter support
[*]USB Driver for GSM and CDMA modems
2.QMI WWAN
(1)添加PID/VID
/kernel/drivers/net/usb/qmi_wwan.c
如果添加的是EC20型号，请注释以下代码。
/kernel/drivers/usb/serial/qcserial.c
{USB_DEVICE(0x05c6, 0x9215)}, /* Acer Gobi 2000 Modem device (VP413) *//kernel/drivers/net/usb/qmi_wwan.c
{QMI_GOBI_DEVICE(0x05c6, 0x9215)}, /* Acer Gobi 2000 Modem device (VP413) */此时，在/dev/下可以找到qcqmi0设备节点
(2)添加对原始 IP 模式的支持
Ec25仅支持原始 IP 模式 (IP 数据包未封装在以太网帧)。因此, 当数据包发送到模块时, 必须剥离以太网标头, 并且从模块接收数据包时添加。
/kernel/drivers/net/usb/qmi_wwan.c
#if 1 //Added by Quectel
#include
struct sk_buff *qmi_wwan_tx_fixup(struct usbnet *dev, struct sk_buff *skb, gfp_t flags)
{
if (dev->udev->descriptor.idVendor != cpu_to_le16(0x2C7C))
return skb;
// Skip Ethernet header from message
if (skb_pull(skb, ETH_HLEN))
return skb;
else
dev_err(&dev->intf->dev, "Packet Dropped ");
// Filter the packet out, release it
dev_kfree_skb_any(skb);
return NULL;
}
#include
#if (LINUX_VERSION_CODE < KERNEL_VERSION( 3,9,1 ))
static int qmi_wwan_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
{
__be16 proto;
if (dev->udev->descriptor.idVendor != cpu_to_le16(0x2C7C))
return 1;
/* This check is no longer done by usbnet */
if (skb->len < dev->net->hard_header_len)
return 0;
switch (skb->data[0] & 0xf0) {
case 0x40:
proto = htons(ETH_P_IP);
break;
case 0x60:
proto = htons(ETH_P_IPV6);
break;
case 0x00:
if (is_multicast_ether_addr(skb->data))
return 1;
/* possibly bogus destination - rewrite just in case */
skb_reset_mac_header(skb);
goto fix_dest;
default:
/* pass along other packets without modifications */
return 1;
}
if (skb_headroom(skb) < ETH_HLEN)
return 0;
skb_push(skb, ETH_HLEN);
skb_reset_mac_header(skb);
eth_hdr(skb)->h_proto = proto;
memset(eth_hdr(skb)->h_source, 0, ETH_ALEN);
fix_dest:
memcpy(eth_hdr(skb)->h_dest, dev->net->dev_addr, ETH_ALEN);
return 1;
}
/* very simplistic detection of IPv4 or IPv6 headers */
static bool possibly_iphdr(const char *data)
{
return (data[0] & 0xd0) == 0x40;
}
#endif
#endif
……
/* if follow function exist, modify it as below */
static int qmi_wwan_bind(struct usbnet *dev, struct usb_interface *intf)
{
……
#if 1 //Added by Quectel
if (dev->udev->descriptor.idVendor == cpu_to_le16(0x2C7C)) {
dev_info(&intf->dev, "Quectel EC25&EC21&EG91&EG95&EG06&EP06&EM06&BG96&AG35 work on RawIP mode\n");
dev->net->flags |= IFF_NOARP;
#if (LINUX_VERSION_CODE < KERNEL_VERSION( 3,9,1 ))
/* make MAC addr easily distinguishable from an IP header */
if (possibly_iphdr(dev->net->dev_addr)) {
dev->net->dev_addr[0] |= 0x02; /* set local assignment bit */
dev->net->dev_addr[0] &= 0xbf; /* clear "IP" bit */
}
#endif
usb_control_msg(
interface_to_usbdev(intf),
usb_sndctrlpipe(interface_to_usbdev(intf), 0),
0x22, //USB_CDC_REQ_SET_CONTROL_LINE_STATE
0x21, //USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE
1, //active CDC DTR
intf->cur_altsetting->desc.bInterfaceNumber,
NULL, 0, 100);
}
#endif
err:
return status;
}
/* if follow struct exist, modify it as below */
static const struct driver_info qmi_wwan_info =
{
……
#if 1 //Added by Quectel
.tx_fixup = qmi_wwan_tx_fixup,
.rx_fixup = qmi_wwan_rx_fixup,
#endif
}
/* if follow struct exist, modify it as below */
static const struct driver_info qmi_wwan_force_int4 = {
……
#if 1 //Added by Quectel
.tx_fixup = qmi_wwan_tx_fixup,
.rx_fixup = qmi_wwan_rx_fixup,
#endif
}; (3)添加内核模块
[*]Device Drivers
[*]Network device support
[*]USB Network Adapters
[*]Multi-purpose USB Networking Framework
<*>QMI WWAN driver for Qualcomm MSM based 3G and LTE modems
3.添加内核ppp
[*]Device Driver
[*]Network device support
[*]PPP (point-to-point protocol) support
4.电源管理
（1）自动挂起
/kernel/drivers/usb/serial/option.c
static int option_probe(struct usb_serial *serial, const struct usb_device_id *id) {
struct usb_wwan_intf_private *data;
……
#if 1 //Added by Quectel
//For USB Auto Suspend
if (serial->dev->descriptor.idVendor == cpu_to_le16(0x05C6) && serial->dev->descriptor.idProduct == cpu_to_le16(0x9090)) {
pm_runtime_set_autosuspend_delay(&serial->dev->dev, 3000);
usb_enable_autosuspend(serial->dev);
}
if (serial->dev->descriptor.idVendor == cpu_to_le16(0x05C6) && serial->dev->descriptor.idProduct == cpu_to_le16(0x9003)) {
pm_runtime_set_autosuspend_delay(&serial->dev->dev, 3000);
usb_enable_autosuspend(serial->dev);
}
if (serial->dev->descriptor.idVendor == cpu_to_le16(0x05C6) && serial->dev->descriptor.idProduct == cpu_to_le16(0x9215)) {
pm_runtime_set_autosuspend_delay(&serial->dev->dev, 3000);
usb_enable_autosuspend(serial->dev);
}
if (serial->dev->descriptor.idVendor == cpu_to_le16(0x2C7C)) {
pm_runtime_set_autosuspend_delay(&serial->dev->dev, 3000);
usb_enable_autosuspend(serial->dev);
}
#endif
/* Store device id so we can use it during attach. */
usb_set_serial_data(serial, (void *)id);
return 0;
}(2)自动唤醒
/kernel/drivers/usb/serial/option.c
static int option_probe(struct usb_serial *serial, const struct usb_device_id *id) {
struct usb_wwan_intf_private *data;
……
#if 1 //Added by Quectel
//For USB Remote Wakeup
if (serial->dev->descriptor.idVendor == cpu_to_le16(0x05C6) && serial->dev->descriptor.idProduct == cpu_to_le16(0x9090)) {
device_init_wakeup(&serial->dev->dev, 1); //usb remote wakeup
}
if (serial->dev->descriptor.idVendor == cpu_to_le16(0x05C6) && serial->dev->descriptor.idProduct == cpu_to_le16(0x9003)) {
device_init_wakeup(&serial->dev->dev, 1); //usb remote wakeup
}
if (serial->dev->descriptor.idVendor == cpu_to_le16(0x05C6) && serial->dev->descriptor.idProduct == cpu_to_le16(0x9215)) {
device_init_wakeup(&serial->dev->dev, 1); //usb remote wakeup
}
if (serial->dev->descriptor.idVendor == cpu_to_le16(0x2C7C)) {
device_init_wakeup(&serial->dev->dev, 1); //usb remote wakeup
}
#endif
/* Store device id so we can use it during attach. */
usb_set_serial_data(serial, (void *)id);
return 0;
}此时，驱动层相关已经添加完了。
如果是linux系统，再添加quectel-CM的拨号工具就可以了。
5.quectel-CM拨号
（1）移植quctel-CM源码
放入/hardware/ril/reference-ril/路径下；
（2）添加default.script脚本
android环境，命令udhcpc -h检查版本调用路径：
将default.script脚本放至该路径（或/usr/share/udhcpc/），并注意执行权限。
权限：可在/system/core/libcutils/fs_config.c文件或init.rc文件中的on init中指定
（3）执行quectel-CM
将sudo quectel-CM -s ctnet 命令添加到脚本，并在/etc/init.d/rc中启动脚本。
检查IP/DNS/网关等配置，没问题可以正常启动。
二.android RIL库
1.添加ril源码
(1)移植ril源码
放入/hardware/ril/reference-ril路径
(2)指定rild库路径
/device/rockchip/rkxx/rkxxxxxx/system.prop
rild.llibpath=/system/lib64/libreference-ril.so
rild.libargs=-d /dev/ttyUSB2 //ttyUSB2是AT口
2.添加phone进程
源码路径：/packages/apps/PhoneCommon
添加编译：/device/rockchip/rk3399/device.mk
PRODUCT_PACKAGES += com.android.phone.common在/out/target/product/rkxxsdk/system/app/下出现com.android.phone.common
3.android系统设置
（1）添加ril-daemon服务到init.rc
/device/rockchip/rk3399/init.rc
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
group radio cache inet misc audio sdcard_rw log(android8及以上)
service ril-daemon /vendor/bin/hw/rild -l /vendor/lib64/libreference-ril.so
class main
user root
group radio cache inet misc audio sdcard_rw log（2）保证rild的root权限
/hardware/ril/rild/rild.c
OpenLib:
#endif
//switchUser();
dlHandle = dlopen(rilLibPath, RTLD_NOW);（3）添加APN
/device/rockchip/rkxx/rkxx.mk
PRODUT_COPY_FILES:= /vendor/rockchip/common/phone/etc/apns-full-conf.xml:system/etc/qpns-conf.xml检查该文件中是否包含所使用的运营商APN信息，如果没有，添加上相应的APN信息。
比如：使用MCC/MNC来确认，而MCC/MNC的值是通过模块查询到的IMSI码的前五位来确定的。
（4）打开dongle功能
/device/rockchip/common/BoardConfig.mk
BOARD_HAVE_DONGLE ?= true
（5）检查
logcat -b radio -v time //查看log
getprop init.svc.ril-daemon //检查ril守护进程Runing
cat init.rc | grep ril-daemon //检查ril-daemon服务是否生效
getenforce //检查SELinux是否开启，
getprop gsm.version.ril-impl //检查ril版本，出现Quectel_Android_RIL_SR01A41V17,如未出现ril库没有添加上，或者检查phone进程