phyCORE-i.MX6 Android 支持EC20 R2.0 / Android Add support for EC20 R2.0 4G Module

EC20 R2.0文档说明书:

Quectel_Android_RIL_Driver_User_Guide_V1.8.pdf

Quectel_WCDMA&LTE_Linux_USB_Driver_User_Guide_V1.8.pdf

Android BSP :

BSP-Android-i.MX6-ALPHA1

kernel配置

配置内核usb serial驱动

根据EC20产品手册, usb serial驱动需要增加对EC20产品支持, 驱动修改如下:

diff --git a/drivers/usb/serial/option.c b/drivers/usb/serial/option.c
index e39a6f8..3165047 100644
--- a/drivers/usb/serial/option.c
+++ b/drivers/usb/serial/option.c
@@ -499,6 +499,10 @@ static void option_instat_callback(struct urb *urb);
 #define INOVIA_VENDOR_ID                       0x20a6
 #define INOVIA_SEW858                          0x1105
 
+/* Quectel EC20 R2.0 */
+#define QUECTEL_VENDOR_ID                      0x2c7c
+#define QUECTEL_PRODUCT_EC20R2                 0x0125
+
 /* some devices interfaces need special handling due to a number of reasons */
 enum option_blacklist_reason {
                OPTION_BLACKLIST_NONE = 0,
@@ -583,6 +587,7 @@ static const struct option_blacklist_info telit_le920_blacklist = {
 };
 
 static const struct usb_device_id option_ids[] = {
+       { USB_DEVICE(QUECTEL_VENDOR_ID, QUECTEL_PRODUCT_EC20R2) },
        { 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) },
@@ -1767,6 +1772,7 @@ static struct usb_serial_driver option_1port_device = {
 #ifdef CONFIG_PM
        .suspend           = usb_wwan_suspend,
        .resume            = usb_wwan_resume,
+       .reset_resume      = usb_wwan_resume,
 #endif
 };
 
@@ -1834,6 +1840,24 @@ static int option_probe(struct usb_serial *serial,
            iface_desc->bInterfaceClass != USB_CLASS_CDC_DATA)
                return -ENODEV;
 
+       /* For Quectel EC20 R2.0 usb auto suspend */
+       if (serial->dev->descriptor.idVendor == cpu_to_le16(QUECTEL_VENDOR_ID)) {
+               pm_runtime_set_autosuspend_delay(&serial->dev->dev, 3000);
+               usb_enable_autosuspend(serial->dev);
+       }
+
+       /* For Quectel EC20 R2.0 usb remote wakeup */
+       if (serial->dev->descriptor.idVendor == cpu_to_le16(QUECTEL_VENDOR_ID)) {
+               device_init_wakeup(&serial->dev->dev, 1);
+       }
+
        /* Store device id so we can use it during attach. */
        usb_set_serial_data(serial, (void *)id);
 
diff --git a/drivers/usb/serial/usb_wwan.c b/drivers/usb/serial/usb_wwan.c
index 36f6b6a..d18fcab 100644
--- a/drivers/usb/serial/usb_wwan.c
+++ b/drivers/usb/serial/usb_wwan.c
@@ -492,6 +492,13 @@ static struct urb *usb_wwan_setup_urb(struct usb_serial_port *port,
                          usb_sndbulkpipe(serial->dev, endpoint) | dir,
                          buf, len, callback, ctx);
 
+       /* Added by Quectel EC20 R2.0 for Zero Packet */
+       if (dir == USB_DIR_OUT) {
+              struct usb_device_descriptor *desc = &serial->dev->descriptor;
+              if (desc->idVendor == cpu_to_le16(0x2c7c))
+                      urb->transfer_flags |= URB_ZERO_PACKET;
+       }
+
        return urb;
 }

menuconfig使能USB serial驱动

使能CONFIG_USB_SERIAL_OPTION,

[*] Device Drivers --->

[*] USB Support --->

[*]USB Serial Converter support --->

[*] USB driver for GSM and CDMA modems

kernel支持PPP

根据手册3.6章节 , 配置menuconfig 使能 CONFIG_PPP_ASYNC, CONFIG_PPP_SYNC_TTY, CONFIG_PPP_DEFALTE

[*]Device Drivers --->

[*] Network device support --->

[*] PPP (point-to-point protocol) support --->

[*]PPP support for async serial ports

[*]PPP support for sync tty ports

[*]PPP Deflate compression

android文件系统增加RIL库支持

根据产品文档, 需要把android系统中的以下执行文件和库都替换为ec20产家提供的文件

/system/bin/chat

/system/etc/ppp/ip-down

/system/etc/ppp/ip-up

/system/lib/libreference-ril.so

在BSP的vendor/SIGMA/miraq的目录下新建ec20目录, 把厂家提供的以上四个文件放在ec20目录下,

修改vendor/SIGMA/miraq目录下的BoardConfig.mk文件, 把厂家提供的文件编译进文件系统

diff --git a/BoardConfig.mk b/BoardConfig.mk
index ff806c7..8e06075 100644
--- a/BoardConfig.mk
+++ b/BoardConfig.mk
@@ -82,6 +82,10 @@ _boardfiles := \
+  $(_thisdir)/ec20/ip-up:system/etc/ppp/ip-up \
+  $(_thisdir)/ec20/ip-down:system/etc/ppp/ip-down \
+  $(_thisdir)/ec20/chat:system/bin/chat \
+  $(_thisdir)/ec20/libreference-ril.so:system/lib/libreference-ril.so \
 
 PRODUCT_COPY_FILES += ${_boardfiles}

修改vendor/SIGMA/miraq目录下的miraq.mk文件, 去掉原来系统中执行文件的依赖

diff --git a/miraq.mk b/miraq.mk
index 3c75f25..d796694 100644
--- a/miraq.mk
+++ b/miraq.mk
@@ -48,10 +48,7 @@ PRODUCT_PACKAGES += \
        libRS                                   \
        librs_jni                               \
        pppd                                    \
-       chat                                    \
        ip-up-vpn                               \
-       ip-up-ppp0                              \
-       ip-down-ppp0                            \
        dispd                                   \
        ts_calibrator                           \
        libion                                  \
@@ -278,7 +275,6 @@ PRODUCT_AAPT_CONFIG := normal mdpi
 
 # ril related libs
 PRODUCT_PACKAGES += \
-       libreference-ril-zte.so \
        libruntime-ril-port
 
 PRODUCT_PACKAGES += \

另外, 需要把bsp的hardware/ril目录下的reference-ril整个目录删掉, 否则编译后的libreference-ril.so还是原来的库.

android系统增加ril-daemon service

在bsp的vendor/SIGMA/miraq目录下的init.rc文件中增加ril-daemon service内容

diff --git a/files/init.rc b/files/init.rc
index c191bce..6c95869 100755
--- a/files/init.rc
+++ b/files/init.rc
@@ -129,6 +129,14 @@ on boot
     #on property:sys.interactive=active
     start tsuinput
 
+# service ril-daemon
+    service ril-daemon /system/bin/rild -l /system/lib/libreference-ril.so
+    class main
+    socket rild stream 660 root radio
+    socket rild-debug stream 666 radio system
+    user root
+    group radio cache inet misc audio sdcard_rw log
+
 # Set watchdog timer to 30 seconds and pet it every 10 seconds to get a 20 second margin
     service watchdogd /sbin/watchdogd 10 20
     class core

另外, 需去掉原来的ril-daemon service, 修改bsp的device/fsl目录下的etc/init.rc文件, 去掉以下内容

diff --git a/imx6/etc/init.rc b/imx6/etc/init.rc
index 330ba7a..5990bde 100755
--- a/imx6/etc/init.rc
+++ b/imx6/etc/init.rc
@@ -800,14 +800,6 @@ service rtl_hostapd /system/bin/hostapd /data/misc/wifi/hostapd.conf
     oneshot
     disabled
 
-service ril-daemon /system/bin/rild
-    class main
-    socket rild stream 660 root radio
-    socket rild-debug stream 660 radio system
-    socket rild-ppp stream 660 radio system
-    user root
-    group radio cache inet misc audio sdcard_rw log
-
 service pppd_gprs /etc/ppp/init.gprs-pppd
     class main
     user root

以上修改后, 编译后的镜像里内核和文件系统都已经支持了ec20. 但是从log中发现RIL不启动.

android系统还需要以下修改, RIL才能启动成功.

修改bsp包的vendor/SIGMA/miraq/overlay/frameworks/base/core/res/res/values/config.xml文件

diff --git a/overlay/frameworks/base/core/res/res/values/config.xml b/overlay/frameworks/base/core/res/res/values/config.xml
index e9cd8e7..8f3b4a3 100755
--- a/overlay/frameworks/base/core/res/res/values/config.xml
+++ b/overlay/frameworks/base/core/res/res/values/config.xml
@@ -59,6 +59,7 @@
     <!-- the 6th element indicates boot-time dependency-met value. -->
     <string-array translatable="false" name="networkAttributes">
         <item>"ethernet,9,9,2,-1,true"</item>
+        <item>"mobile,0,0,0,-1,true"</item>
     </string-array>
 
     <bool name="config_automatic_brightness_available">true</bool>

重新编译系统后, RIL就能成功启动.

android配置APN

经过以上修改后的系统, 第一次启动还需要增加APN的配置.

设置->无线和网络->更多->移动网络->接入点名称(APN)→添加APN配置并保存

设置->无线和网络->更多->移动网络->首选网络类型->3G

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