09 --> OpenWRT's linux kernel patch method, add 5G module driver

Others 2021-03-22 15:29:13 views: null

1. Prepare the kernel source tree

Use the following command

make target/linux/clean V=s QUILT=1
make targe/linux/prepare V=s QUILT=1

2. Enter the kernel source tree directory

/OpenWrt/LS1046A-19.07/build_dir/target-aarch64_generic_glibc/linux-layerscape_armv8_64b/linux-4.14.200$ ls
arch   certs    CREDITS  Documentation  firmware  include  ipc     Kconfig  lib          Makefile  net      README   scripts   sound  usr
block  COPYING  crypto   drivers        fs        init     Kbuild  kernel   MAINTAINERS  mm        patches  samples  security  tools  virt

3. Update the kernel patch file

quilt push -a
 quilt push -a
Applying patch generic-backport/010-Kbuild-don-t-hardcode-path-to-awk-in-scripts-ld-vers.patch
patching file scripts/ld-version.sh

Applying patch generic-backport/011-kbuild-export-SUBARCH.patch
patching file Makefile

Applying patch generic-backport/012-kbuild-add-macro-for-controlling-warnings-to-linux-c.patch
patching file include/linux/compiler-gcc.h
patching file include/linux/compiler_types.h

Applying patch generic-backport/013-disable-Wattribute-alias-warning-for-SYSCALL_DEFINEx.patch
patching file include/linux/compat.h

4. Create a new patch, modify the kernel driver

Take the modification of the SIM8200 5G module driver as an example

linux-4.14.200$ quilt top 
platform/825-tmu-support-layerscape.patch
linux-4.14.200$ quilt new platform/826-ls10xx-usb-serial-option.patch
linux-4.14.200$ quilt add drivers/usb/serial/option.c
# vim drivers/usb/serial/option.c 补充修改内容
linux-4.14.200$ quilt diff
--- a/drivers/usb/serial/option.c
+++ b/drivers/usb/serial/option.c
@@ -85,6 +85,7 @@ static void option_instat_callback(struc
 #define HUAWEI_PRODUCT_K3765                   0x1465
 #define HUAWEI_PRODUCT_K4605                   0x14C6
 #define HUAWEI_PRODUCT_E173S6                  0x1C07
+#define HUAWEI_PRODUCT_ME906S                  0x15c1
 
 #define QUANTA_VENDOR_ID                       0x0408
 #define QUANTA_PRODUCT_Q101                    0xEA02
@@ -348,6 +349,7 @@ static void option_instat_callback(struc
 
 #define ALINK_VENDOR_ID                        0x1e0e
 #define SIMCOM_PRODUCT_SIM7100E                0x9001 /* Yes, ALINK_VENDOR_ID */
+#define SIMCOM_PRODUCT_SIM8200                 0x9011 /* SIMCOM 7600,8200 serial */
 #define ALINK_PRODUCT_PH300                    0x9100
 #define ALINK_PRODUCT_3GU                      0x9200

5. Update the content of the patch

linux-4.14.200$ quilt refresh 
Refreshed patch 1000-ls10xx-usb-serial-option.patch

6. Save the patch file to buildroot

linux-4.14.200$ cd ../../../../
robot@ubuntu:~/OpenWrt/LS1046A-19.07$ make target/linux/update V=s
make[1]: Entering directory '/home/robot/OpenWrt/LS1046A-19.07'
make[2]: Entering directory '/home/robot/OpenWrt/LS1046A-19.07/target/linux'
make[3]: Entering directory '/home/robot/OpenWrt/LS1046A-19.07/target/linux/layerscape'
if [ -s "/home/robot/OpenWrt/LS1046A-19.07/build_dir/target-aarch64_generic_glibc/linux-layerscape_armv8_64b/linux-4.14.200/patches/series" ]; then (cd "/home/robot/OpenWrt/LS1046A-19.07/build_dir/target-aarch64_generic_glibc/linux-layerscape_armv8_64b/linux-4.14.200"; if quilt --quiltrc=- next >/dev/null 2>&1; then quilt --quiltrc=- push -a; else quilt --quiltrc=- top >/dev/null 2>&1; fi ); fi
'/home/robot/OpenWrt/LS1046A-19.07/build_dir/target-aarch64_generic_glibc/linux-layerscape_armv8_64b/linux-4.14.200/patches/platform/825-tmu-support-layerscape.patch' -> '/home/robot/OpenWrt/LS1046A-19.07/target/linux/layerscape/patches-4.14/825-tmu-support-layerscape.patch'
# 新产生补丁包路径及名称
'/home/robot/OpenWrt/LS1046A-19.07/build_dir/target-aarch64_generic_glibc/linux-layerscape_armv8_64b/linux-4.14.200/patches/platform/826-ls10xx-usb-serial-option.patch' -> '/home/robot/OpenWrt/LS1046A-19.07/target/linux/layerscape/patches-4.14/***826-ls10xx-usb-serial-option.patch***'
make[3]: Leaving directory '/home/robot/OpenWrt/LS1046A-19.07/target/linux/layerscape'
make[2]: Leaving directory '/home/robot/OpenWrt/LS1046A-19.07/target/linux'

6. Modification and update of patch files


####### (1) 打补丁文件并更新内容
linux-4.14.200$ quilt push -a
File series fully applied, ends at patch platform/826-ls10xx-usb-serial-option.patch
linux-4.14.200$ vim drivers/usb/serial/option.c 

#######(2) 查看更新内容        
linux-4.14.200$ quilt diff
--- a/drivers/usb/serial/option.c
+++ b/drivers/usb/serial/option.c
@@ -85,6 +85,7 @@ static void option_instat_callback(struc
 #define HUAWEI_PRODUCT_K3765                   0x1465
 #define HUAWEI_PRODUCT_K4605                   0x14C6
 #define HUAWEI_PRODUCT_E173S6                  0x1C07
+#define HUAWEI_PRODUCT_ME906S                  0x15C1
 #define QUANTA_VENDOR_ID                       0x0408
 #define QUANTA_PRODUCT_Q101                    0xEA02
@@ -348,6 +349,7 @@ static void option_instat_callback(struc
 #define ALINK_VENDOR_ID                                0x1e0e
 #define SIMCOM_PRODUCT_SIM7100E                        0x9001 /* Yes, ALINK_VENDOR_ID */
+#define SIMCOM_PRODUCT_SIM8200      0x9011 /* simcom 7600 & 8200 product id */
 #define ALINK_PRODUCT_PH300                    0x9100
 #define ALINK_PRODUCT_3GU                      0x9200
@@ -628,6 +630,8 @@ static const struct usb_device_id option
          .driver_info = RSVD(1) },
        {
    
     USB_DEVICE_AND_INTERFACE_INFO(HUAWEI_VENDOR_ID, HUAWEI_PRODUCT_K4605, 0xff, 0xff, 0xff),
          .driver_info = RSVD(1) | RSVD(2) },
+  {
    
     USB_DEVICE_AND_INTERFACE_INFO(HUAWEI_VENDOR_ID, HUAWEI_PRODUCT_ME906S, 0xff, 0xff, 0xff),
+    .driver_info = RSVD(1) | RSVD(2) },    
        {
    
     USB_VENDOR_AND_INTERFACE_INFO(HUAWEI_VENDOR_ID, 0xff, 0xff, 0xff) },
        {
    
     USB_VENDOR_AND_INTERFACE_INFO(HUAWEI_VENDOR_ID, 0xff, 0x01, 0x01) },
        {
    
     USB_VENDOR_AND_INTERFACE_INFO(HUAWEI_VENDOR_ID, 0xff, 0x01, 0x02) },
@@ -1824,7 +1828,7 @@ static const struct usb_device_id option
        {
    
     USB_DEVICE(ALINK_VENDOR_ID, SIMCOM_PRODUCT_SIM7100E),
          .driver_info = RSVD(5) | RSVD(6) },
        {
    
     USB_DEVICE_INTERFACE_CLASS(0x1e0e, 0x9003, 0xff) },   /* Simcom SIM7500/SIM7600 MBIM mode */
-       {
    
     USB_DEVICE_INTERFACE_CLASS(0x1e0e, 0x9011, 0xff),     /* Simcom SIM7500/SIM7600 RNDIS mode */
+       {
    
     USB_DEVICE_INTERFACE_CLASS(0x1e0e, SIMCOM_PRODUCT_SIM8200, 0xff),     /* Simcom SIM7500/SIM7600 RNDIS mode */
          .driver_info = RSVD(7) },
        {
    
     USB_DEVICE_INTERFACE_CLASS(0x1e0e, 0x9205, 0xff) },   /* Simcom SIM7070/SIM7080/SIM7090 AT+ECM mode */
        {
    
     USB_DEVICE_INTERFACE_CLASS(0x1e0e, 0x9206, 0xff) },   /* Simcom SIM7070/SIM7080/SIM7090 AT-only mode */

####### (3) 更新补丁文件的内容        
linux-4.14.200$ quilt refresh 
Warning: trailing whitespace in line 634 of drivers/usb/serial/option.c
Refreshed patch platform/826-ls10xx-usb-serial-option.patch


####### (4) 更新补丁文件至 target/linux/layerscape  目录
/OpenWrt/LS1046A-19.07$ make target/linux/refresh V=s
make[1]: Entering directory '/home/robot/OpenWrt/LS1046A-19.07'
make[2]: Entering directory '/home/robot/OpenWrt/LS1046A-19.07/target/linux'
make[3]: Entering directory '/home/robot/OpenWrt/LS1046A-19.07/target/linux/layerscape'
Applying patch generic-backport/010-Kbuild-don-t-hardcode-path-to-awk-in-scripts-ld-vers.patch
patching file scripts/ld-version.sh
'/home/robot/OpenWrt/LS1046A-19.07/build_dir/target-aarch64_generic_glibc/linux-layerscape_armv8_64b/linux-4.14.200/patches/platform/826-ls10xx-usb-serial-option.patch' -> '/home/robot/OpenWrt/LS1046A-19.07/target/linux/layerscape/patches-4.14/826-ls10xx-usb-serial-option.patch'
make[3]: Leaving directory '/home/robot/OpenWrt/LS1046A-19.07/target/linux/layerscape'
make[2]: Leaving directory '/home/robot/OpenWrt/LS1046A-19.07/target/linux'
time: target/linux/refresh#51.70#18.13#65.19

7. Compile the kernel


robot@ubuntu:~/OpenWrt/LS1046A-19.07$ make target/linux/compile
time: target/linux/prereq#0.08#0.01#0.10
 make[1] target/linux/compile
 make[2] -C target/linux compile
 
robot@ubuntu:~/OpenWrt/LS1046A-19.07$ make target/linux/install
 make[1] target/linux/install
 make[2] -C target/linux install

8. Verify 5G driver

在这里插入代码片

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