Uart to LinBus on Android

Ref.
1. https://rtime.felk.cvut.cz/can/lin-bus/
    for Uart to linbus

2. https://github.com/linux-can/can-utils
    for slcan_attach modify

3. https://github.com/karelzak/util-linux
    for ldattach

4. https://github.com/shemminger/iproute2
    for ip link set up in C code
  
///// Linux Kernel /////
1. Copy sllin.c to kernel_imx/drivers/net/can

2. gedit kernel_imx/include/uapi/linux/tty.h
//add
#define N_SLLIN            25

3. Modify Makefile in kernel_imx/drivers/net/can
obj-$(CONFIG_CAN_SLLIN)        += sllin.o

4. Add in Kconfig
gedit kernel_imx/drivers/net/can/Kconfig
### begin: issue #3727 ###
config CAN_SLLIN
    tristate "Serial / UART serial CAN Adaptors (sllin)"
    ---help---
      slLIN is TTY line discipline implemented for Linux operating
      system that handles the interchange of LIN messages between
      the underlying UART driver and the CAN bus subsystem.
### end: issue #3727 ###

5. Add in Default Config
gedit kernel_imx/arch/arm/configs/mx6dq_matrix_android_defconfig
### begin: issue #3727 ###
CONFIG_CAN_SLLIN=y
### end: issue #3727 ###

6.
gedit ~/myandroid/external/sepolicy/app.te
//add
neverallow { appdomain -bluetooth -shell -system_app } self:capability *;

7.
gedit /mnt/projects/marsh_200/myandroid/device/fsl/matrix_io/sepolicy/shell.te
//add
allow shell self:capability net_admin;
allow shell self:netlink_route_socket nlmsg_write;

8.
gedit ~/myandroid/device/fsl/matrix_io/sepolicy/system_app.te
//add
allow system_app self:capability net_admin;
allow system_app self:netlink_route_socket nlmsg_write;

/////////////////////////////////////////
///// Android UserSpace /////
1. Copy external/canutils/slcan_attach.c to external/canutils/sllin_attach.c

2. gedit external/canutils/sllin_attach.c
//int ldisc = N_SLCAN;
to
int ldisc = N_SLLIN;

3. gedit bionic/libc/kernel/uapi/linux/tty.h
//add
#define N_SLLIN            25

4. gedit device.mk
//add
### begin: issue #3727 ###
PRODUCT_PACKAGES += \
candump \
cangen \
sllin_attach \
ldattach
### end: issue #3727 ###

5. in Target console A
su
sllin_attach -w /dev/ttymxc2

6. in Local terminal B
adb shell
su
cangen sllin0 -R -I1 -n1 -L0

7. in Local terminal C
adb shell
su
candump sllin0

////////////////////another way from step 5
5. in Target console A
su
ldattach SLLIN /dev/ttymxc2
ip link set sllin0 up
cangen sllin0 -R -I1 -n1 -L0

6. in Target terminal B
adb shell
su
candump sllin0

source download:
http://www.mediafire.com/file/8drkcbu54pvbfwv/sllin_linbus.tar.gz