qualcommax: ipq807x: add support for Linksys MX4300 (LN1301)

qualcommax: ipq807x: add support for Linksys MX4300 (LN1301)

Hardware specification:
========
SoC: Qualcomm IPQ8174
Flash: 1GB (Micron MT29F8G08ABBCAH4 or AMD/Spansion S34MS08G2)
RAM: 2GB (2x Kingston B5116ECMDXGJD or ESMT M15T2G16128A DDR3L)
Ethernet: 4x 10/100/1000Mbps (Qualcomm QCA8075)
WiFi1: 5GHz ax 2x2 (Qualcomm QCN5054 + Skyworks SKY85755-11) - channels 36-64 (low band)
WiFi2: 2.4GHz ax 2x2 (Qualcomm QCN5024 + Skyworks SKY85340-11)
WiFi3: 5GHz ax 4x4 (Qualcomm QCN5054 + Skyworks SKY85755-11) - channels 100-177 (high band)
LED: 1x RGB status (NXP PCA9633)
USB: 1x USB 3.0
Button: WPS, Reset

Flash instructions:
========
1. Manually upgrade firmware using openwrt-qualcommax-ipq807x-linksys_mx4300-squashfs-factory.bin image.
More details can be found here: https://support.linksys.com/kb/article/6564-en/
After first boot check actual partition:
- fw_printenv -n boot_part
and install firmware on second partition using command in case of 2:
- mtd -r -e kernel -n write openwrt-qualcommax-ipq807x-linksys_mx4300-squashfs-factory.bin kernel
and in case of 1:
- mtd -r -e alt_kernel -n write openwrt-qualcommax-ipq807x-linksys_mx4300-squashfs-factory.bin alt_kernel

2. Installation using serial connection from OEM firmware (default login: root, password: admin):
- fw_printenv -n boot_part
In case of 2:
- flash_erase /dev/mtd21 0 0
- nandwrite -p /dev/mtd21 openwrt-qualcommax-ipq807x-linksys_mx4300-squashfs-factory.bin
or in case of 1:
- flash_erase /dev/mtd23 0 0
- nandwrite -p /dev/mtd23 openwrt-qualcommax-ipq807x-linksys_mx4300-squashfs-factory.bin
After first boot install firmware on second partition:
- mtd -r -e kernel -n write openwrt-qualcommax-ipq807x-linksys_mx4300-squashfs-factory.bin kernel
or:
- mtd -r -e alt_kernel -n write openwrt-qualcommax-ipq807x-linksys_mx4300-squashfs-factory.bin alt_kernel

3. Installation from initramfs image using USB drive:
Put the initramfs image on the USB drive:
- dd bs=1M if=openwrt-qualcommax-ipq807x-linksys_mx4300-initramfs-uImage.itb of=/dev/sdX
Stop u-boot and run:
- usb start && usbboot $loadaddr 0 && bootm $loadaddr
Write firmware to the flash from initramfs:
- mtd -e kernel -n write openwrt-qualcommax-ipq807x-linksys_mx4300-squashfs-factory.bin kernel
and:
- mtd -r -e alt_kernel -n write openwrt-qualcommax-ipq807x-linksys_mx4300-squashfs-factory.bin alt_kernel

4. Back to the OEM firmware:
- mtd -e kernel -n write FW_MX4300_1.0.4.215382_prod.img kernel
and:
- mtd -r -e alt_kernel -n write FW_MX4300_1.0.4.215382_prod.img alt_kernel

5. USB recovery:
Put the initramfs image on the USB:
- dd bs=1M if=openwrt-qualcommax-ipq807x-linksys_mx4300-initramfs-uImage.itb of=/dev/sdX
Set u-boot env:
- fw_setenv bootusb 'usb start && usbboot $loadaddr 0 && bootm $loadaddr'
- fw_setenv bootcmd 'run bootusb; if test $auto_recovery = no; then bootipq; elif test $boot_part = 1; then run bootpart1; else run bootpart2; fi'

Co-authored-by: Qiyuan Zhang <zhang.github@outlook.com>
Signed-off-by: Paweł Owoc <frut3k7@gmail.com>
Link: https://github.com/openwrt/openwrt/pull/16070
Signed-off-by: Robert Marko <robimarko@gmail.com>