UART on PCIe Minicard is not working on Jetson Nano
Hi,
We are trying to use a XR17V354 based Quad Serial PCIe MiniCard (DS-MPE-SER4M Quad Serial MiniCard) which provides 4 serial ports on Jetson Nano/NX.
We have tried this on Jetson Nano and Jetson NX stock BSPs L4T 32.4.3 and L4T32.5.X and above.
This minicard works fine with other devices, and also Jetson NX. But we have problem with Jetson Nano. 3 out of 4 ports are working but 4th port is not communicating in Nano.
ttyS1 is for port1
ttyS2 is for port2
ttyS3 is for port3
and port 4 is not working, may be it is mapped to ttyS0 is not working.
Here is the dmesg log for both NX and Nano. in Nano the ttyS0 is listing differently and not listing as XR17V35X port. What could be the reason? any solution you suggest?
for Nano:
nvidia@nvidia-desktop:~$ dmesg | grep tty
[ 0.000000] Kernel command line: tegraid=21.1.2.0.0 ddr_die=4096M@2048M section=512M memtype=0 vpr_resize usb_port_owner_info=0 lane_owner_info=0 emc_max_dvfs=0 touch_id=0@63 video=tegrafb no_console_suspend=1 console=ttyS0,115200n8 debug_uartport=lsport,4 earlyprintk=uart8250-32bit,0x70006000 maxcpus=4 usbcore.old_scheme_first=1 lp0_vec=0x1000@0xff780000 core_edp_mv=1075 core_edp_ma=4000 gpt earlycon=uart8250,mmio32,0x70006000 root=/dev/mmcblk0p1 rw rootwait rootfstype=ext4 console=ttyS0,115200n8 console=tty0 fbcon=map:0 net.ifnames=0 sdhci_tegra.en_boot_part_access=1 quiet root=/dev/mmcblk0p1 rw rootwait rootfstype=ext4 console=ttyS0,115200n8 console=tty0 fbcon=map:0 net.ifnames=0 sdhci_tegra.en_boot_part_access=1
[ 0.001754] console [tty0] enabled
[ 1.598501] console [ttyS0] disabled
[ 1.598537] 70006000.serial: ttyS0 at MMIO 0x70006000 (irq = 63, base_baud = 25500000) is a Tegra
[ 1.608745] console [ttyS0] enabled
[ 1.609480] 70006040.serial: ttyTHS1 at MMIO 0x70006040 (irq = 64, base_baud = 0) is a TEGRA_UART
[ 1.609775] 70006200.serial: ttyTHS2 at MMIO 0x70006200 (irq = 65, base_baud = 0) is a TEGRA_UART
[ 1.630173] 0000:04:00.0: ttyS1 at MMIO 0x13200000 (irq = 83, base_baud = 7812500) is a XR17V35X
[ 1.630506] 0000:04:00.0: ttyS2 at MMIO 0x13200400 (irq = 83, base_baud = 7812500) is a XR17V35X
[ 1.630837] 0000:04:00.0: ttyS3 at MMIO 0x13200800 (irq = 83, base_baud = 7812500) is a XR17V35X
nvidia@nvidia-desktop:~$
for NX:
nvidia@nvidia:~$ dmesg | grep tty
[ 0.000000] Kernel command line: console=ttyTCU0,115200 video=tegrafb no_console_suspend=1 earlycon=tegra_comb_uart,mmio32,0x0c168000 gpt usbcore.old_scheme_first=1 tegraid=19.1.2.0.0 maxcpus=6 boot.slot_suffix= boot.ratchetvalues=0.4.2 vpr_resize sdhci_tegra.en_boot_part_access=1 quiet root=/dev/mmcblk0p1 rw rootwait rootfstype=ext4 console=ttyTCU0,115200n8 console=tty0 fbcon=map:0 net.ifnames=0
[ 0.000585] console [tty0] enabled
[ 1.464528] 3100000.serial: ttyTHS0 at MMIO 0x3100000 (irq = 47, base_baud = 0) is a TEGRA_UART
[ 1.465909] 3110000.serial: ttyTHS1 at MMIO 0x3110000 (irq = 48, base_baud = 0) is a TEGRA_UART
[ 1.466575] 3140000.serial: ttyTHS4 at MMIO 0x3140000 (irq = 49, base_baud = 0) is a TEGRA_UART
[ 1.467536] console [ttyTCU0] enabled
[ 2.855500] 0005:04:00.0: ttyS0 at MMIO 0x1f40200000 (irq = 35, base_baud = 7812500) is a XR17V35X
[ 2.855814] 0005:04:00.0: ttyS1 at MMIO 0x1f40200400 (irq = 35, base_baud = 7812500) is a XR17V35X
[ 2.856113] 0005:04:00.0: ttyS2 at MMIO 0x1f40200800 (irq = 35, base_baud = 7812500) is a XR17V35X
[ 2.856465] 0005:04:00.0: ttyS3 at MMIO 0x1f40200c00 (irq = 35, base_baud = 7812500) is a XR17V35X
[ 5.527261] systemd[1]: Created slice system-serial\x2dgetty.slice.
nvidia@nvidia:~$
