Could not find device ttySX

[SfCal]

I'm experiencing issues as I'm following along the Time Card installation and usage guide.

OS: Ubuntu 22.04.4 LTS x86_64
Host: NUC9VXQNX K47173-402
Kernel: 5.15.0-101-generic

Being on Ubuntu 22.04.4 I went straight to step 11 and made sure the driver was up to date.

I'm a bit concerned about missing NMEA in dmesg here

[    0.486218] pci 0000:02:00.0: [1d9b:0400] type 00 class 0x058000
[    0.486242] pci 0000:02:00.0: reg 0x10: [mem 0x90000000-0x91ffffff]
[    0.602696] pci 0000:02:00.0: Adding to iommu group 1
[    5.205701] ptp_ocp 0000:02:00.0: enabling device (0000 -> 0002)
[    5.207805] 0000:02:00.0: ttyS5 at MMIO 0x90161000 (irq = 175, base_baud = 3125000) is a 16550A
[    5.210203] 0000:02:00.0: ttyS6 at MMIO 0x90181000 (irq = 177, base_baud = 3125000) is a 16550A
[    5.212064] ptp_ocp 0000:02:00.0: Time: 1711770702.739673435, UNSYNCED
[    5.212124] ptp_ocp 0000:02:00.0: Version 1.2.0, clock PPS, device ptp3
[    5.212128] ptp_ocp 0000:02:00.0: TOD Version 2.2.1
[    5.212135] ptp_ocp 0000:02:00.0: control: 10000001
[    5.212137] ptp_ocp 0000:02:00.0: TOD Protocol UBX enabled
[    5.212138] ptp_ocp 0000:02:00.0: GNSS ALL
[    5.212142] ptp_ocp 0000:02:00.0: status: 0
[    5.212146] ptp_ocp 0000:02:00.0: correction: 0
[    5.212149] ptp_ocp 0000:02:00.0: utc_status: 0
[    5.212150] ptp_ocp 0000:02:00.0: utc_offset: 0  valid:0  leap_valid:0
[    5.212154] ptp_ocp 0000:02:00.0: version 1a
[    5.212155] ptp_ocp 0000:02:00.0: regular image, version 26
[    5.212156] ptp_ocp 0000:02:00.0: GNSS @ /dev/ttyS5 115200
[    5.212157] ptp_ocp 0000:02:00.0: MAC @ /dev/ttyS6   57600

Here's the output from cgps

lqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqklqqqqqqqqqqqqqqqqqqSeen  0/Used  0k
x Time:          n/a (0)                    xxGNSS   PRN  Elev   Azim   SNR Usex
x Latitude:        n/a                      xx                                 x
x Longitude:       n/a                      xx                                 x
x Alt (HAE, MSL):        n/a,       n/a     xx                                 x
x Speed:           n/a                      xx                                 x
x Track (true, var):                n/a deg xx                                 x
x Climb:           n/a                      xx                                 x
x Status:         NO FIX (0 secs)           xx                                 x
x Long Err  (XDOP, EPX):  n/a ,  n/a        xx                                 x
x Lat Err   (YDOP, EPY):  n/a ,  n/a        xx                                 x
x Alt Err   (VDOP, EPV):  n/a ,  n/a        xx                                 x
x 2D Err    (HDOP, CEP):  n/a ,  n/a        xx                                 x
x 3D Err    (PDOP, SEP):  n/a ,  n/a        xx                                 x
x Time Err  (TDOP):       n/a               xx                                 x
x Geo Err   (GDOP):       n/a               xx                                 x
x ECEF X, VX:              n/a    n/a       xx                                 x
x ECEF Y, VY:              n/a    n/a       xx                                 x
x ECEF Z, VZ:              n/a    n/a       xx                                 x
x Speed Err (EPS):        n/a               xx                                 x
x Track Err (EPD):        n/a               xx                                 x
x Time offset:            n/a               xx                                 x
x Grid Square:            n/a               xx                                 x
mqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqjmqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqj

{"class":"VERSION","release":"3.22","rev":"3.22","proto_major":3,"proto_minor":14}
{"class":"DEVICES","devices":[]}
{"class":"WATCH","enable":true,"json":true,"nmea":false,"raw":0,"scaled":false,"timing":false,"split24":false,"pps":false}

I didn't feel confident that I understood how to use gpsd correctly so I also confirmed with pygpsclient below. I am getting data from ttyS5 and it seems correct.

I purchased the Time Card from Makerfab and used a NUC 9 Pro because it was within the supported systems list. I didn't see any recommendation for a specific GPS receiver so I found a generic one on amazon this one specifically. It is outside so it has LOS to the sky. Curious what I may be missing here.

[SfCal]

Wanted to leave an update, switched over to a desktop system I had:

OS: Pop!_OS 22.04 LTS x86_64
Host: Z690 UD AX DDR4
Kernel: 6.8.0-76060800daily20240311-generic

I was able to get gpsd working, I was unable to use the command gpsd /dev/ttyS5 to set the device and had to instead edit it directly from /etc/default/gpsd and restart the service.

Curiously, I am getting Could not find device ttySX but each device appears to be working as expected. Will attempt BIOS update on NUC later.

[    1.194851] pci 0000:06:00.0: [1d9b:0400] type 00 class 0x058000 PCIe Endpoint
[    1.194878] pci 0000:06:00.0: BAR 0 [mem 0x42000000-0x43ffffff]
[    1.194972] pci 0000:06:00.0: enabling Extended Tags
[    1.254669] pci 0000:06:00.0: Adding to iommu group 19
[    7.633255] ptp_ocp 0000:06:00.0: enabling device (0000 -> 0002)
[    7.660873] 0000:06:00.0: ttyS4 at MMIO 0x42161000 (irq = 160, base_baud = 3125000) is a 16550A
[    7.674818] 0000:06:00.0: ttyS5 at MMIO 0x42171000 (irq = 161, base_baud = 3125000) is a 16550A
[    7.678954] 0000:06:00.0: ttyS6 at MMIO 0x42181000 (irq = 162, base_baud = 3125000) is a 16550A
[    7.680243] 0000:06:00.0: ttyS7 at MMIO 0x42191000 (irq = 167, base_baud = 3125000) is a 16550A
[    7.681502] ptp_ocp 0000:06:00.0: Could not find device ttyS4
[    7.681504] ptp_ocp 0000:06:00.0: Could not find device ttyS5
[    7.681504] ptp_ocp 0000:06:00.0: Could not find device ttyS6
[    7.681505] ptp_ocp 0000:06:00.0: Could not find device ttyS7
[    7.681522] ptp_ocp 0000:06:00.0: Version 1.2.0, clock PPS, device ptp0
[    7.681533] ptp_ocp 0000:06:00.0: Time: 1712200239.97249309, in-sync
[    7.681534] ptp_ocp 0000:06:00.0:  GNSS: /dev/ttyS4  @ 115200
[    7.681535] ptp_ocp 0000:06:00.0: GNSS2: /dev/ttyS5  @ 115200
[    7.681535] ptp_ocp 0000:06:00.0:   MAC: /dev/ttyS6  @  57600
[    7.681539] ptp_ocp 0000:06:00.0:  NMEA: /dev/ttyS7  @ 115200

[SfCal]

Switched to the newly released Ubuntu 24.04 for some more testing.

Worked the same as Pop_OS but decided to recompile the kernel anyway in case. The only kernel parameter that wasn't already set correctly as defined by the install guide was CONFIG_IKCONFIG=y and CONFIG_DEBUG_INFO_BTF=n however this didn't seem to change anything.

After updating the card firmware to v27 this is what I'm getting.

[    2.331098] ptp_ocp: module verification failed: signature and/or required key missing - tainting kernel
[    2.332021] ptp_ocp 0000:02:00.0: enabling device (0000 -> 0002)
[    2.332598] ptp_ocp 0000:02:00.0: MSI/MSI-X info: 32
[    2.341284] ptp_ocp 0000:02:00.0: Could not find device ttyS6
[    2.341738] ptp_ocp 0000:02:00.0: Could not find device ttyS7
[    2.341739] ptp_ocp 0000:02:00.0: Could not find device ttyS8
[    2.341740] ptp_ocp 0000:02:00.0: Could not find device ttyS9
[    2.341812] ptp_ocp 0000:02:00.0: Version 1.2.0, clock PPS, device ptp3
[    2.342764] ptp_ocp 0000:02:00.0: Time: 1715354082.175616378, in-sync
[    2.342765] ptp_ocp 0000:02:00.0:  GNSS: /dev/ttyS6  @ 115200
[    2.342787] ptp_ocp 0000:02:00.0: GNSS2: /dev/ttyS7  @ 115200
[    2.342788] ptp_ocp 0000:02:00.0:   MAC: /dev/ttyS8  @  57600
[    2.342791] ptp_ocp 0000:02:00.0:  NMEA: /dev/ttyS9  @   9600

[SfCal]

You'll have to forgive me here as I'm not super familiar with device drivers.

"Could not find device ttySX is located in ptp_ocp_link_child() which itself calls device_find_child_by_name().

Here's where we see an issue. Printing child devices does not seem to return any of the ttySX's. What is the expected output here?

Here is what I modified in ptp_ocp.c and the corresponding dmesg output.

[    0.436299] pci 0000:02:00.0: [1d9b:0400] type 00 class 0x058000 PCIe Endpoint
[    0.436323] pci 0000:02:00.0: BAR 0 [mem 0x90000000-0x91ffffff]
[    0.536194] pci 0000:02:00.0: Adding to iommu group 2
[    3.178399] ptp_ocp: loading out-of-tree module taints kernel.
[    3.178403] ptp_ocp: module verification failed: signature and/or required key missing - tainting kernel
[    3.179012] ptp_ocp 0000:02:00.0: enabling device (0000 -> 0002)
[    3.179298] ptp_ocp 0000:02:00.0: MSI/MSI-X info: 32
[    3.179584] 0000:02:00.0: ttyS6 at MMIO 0x90161000 (irq = 188, base_baud = 3125000) is a 16550A
[    3.181108] 0000:02:00.0: ttyS7 at MMIO 0x90171000 (irq = 189, base_baud = 3125000) is a 16550A
[    3.182604] 0000:02:00.0: ttyS0 at MMIO 0x90181000 (irq = 190, base_baud = 3125000) is a 16550A
[    3.184083] 0000:02:00.0: ttyS1 at MMIO 0x90191000 (irq = 195, base_baud = 3125000) is a 16550A
[    3.185766] Parent device name: 0000:02:00.0
[    3.185768] Child device found: ocp0
[    3.185769] Child device found: xiic-i2c.2048
[    3.185770] Child device found: 0000:02:00.0:0
[    3.185772] Child device found: xilinx_spi.1024
[    3.185773] Child device found: ptp3
[    3.185775] ptp_ocp 0000:02:00.0: Could not find device ttyS6
[    3.185778] Parent device name: 0000:02:00.0
[    3.185779] Child device found: ocp0
[    3.185780] Child device found: xiic-i2c.2048
[    3.185782] Child device found: 0000:02:00.0:0
[    3.185783] Child device found: xilinx_spi.1024
[    3.185784] Child device found: ptp3
[    3.185786] ptp_ocp 0000:02:00.0: Could not find device ttyS7
[    3.185788] Parent device name: 0000:02:00.0
[    3.185789] Child device found: ocp0
[    3.185790] Child device found: xiic-i2c.2048
[    3.185792] Child device found: 0000:02:00.0:0
[    3.185793] Child device found: xilinx_spi.1024
[    3.185794] Child device found: ptp3
[    3.185795] ptp_ocp 0000:02:00.0: Could not find device ttyS0
[    3.185797] Parent device name: 0000:02:00.0
[    3.185798] Child device found: ocp0
[    3.185800] Child device found: xiic-i2c.2048
[    3.185801] Child device found: 0000:02:00.0:0
[    3.185802] Child device found: xilinx_spi.1024
[    3.185803] Child device found: ptp3
[    3.185805] ptp_ocp 0000:02:00.0: Could not find device ttyS1
[    3.185807] Parent device name: 0000:02:00.0
[    3.185808] Child device found: ocp0
[    3.185810] Child device found: xiic-i2c.2048
[    3.185811] Child device found: 0000:02:00.0:0
[    3.185812] Child device found: xilinx_spi.1024
[    3.185813] Child device found: ptp3
[    3.185857] ptp_ocp 0000:02:00.0: Version 1.2.0, clock PPS, device ptp3
[    3.185869] ptp_ocp 0000:02:00.0: Time: 1718135008.201674902, in-sync
[    3.185875] ptp_ocp 0000:02:00.0:  GNSS: /dev/ttyS6  @ 115200
[    3.185877] ptp_ocp 0000:02:00.0: GNSS2: /dev/ttyS7  @ 115200
[    3.185877] ptp_ocp 0000:02:00.0:   MAC: /dev/ttyS0  @  57600
[    3.185881] ptp_ocp 0000:02:00.0:  NMEA: /dev/ttyS1  @   9600

static int
print_child_device(struct device *dev, void *data)
{
    pr_info("Child device found: %s\n", dev_name(dev));
    return 0;
}

static void
ptp_ocp_link_child(struct ptp_ocp *bp, const char *name, const char *link)
{
    struct device *dev, *child;

    dev = &bp->pdev->dev;
//-------------------------------------
    if (!dev) {
        pr_err("Parent device is NULL\n");
        return;
    }
    pr_info("Parent device name: %s\n", dev_name(dev));

    device_for_each_child(dev, NULL, print_child_device);
//---------------------------------------

    child = device_find_child_by_name(dev, name);
    if (!child) {
        dev_err(dev, "Could not find device %s\n", name);
        return;
    }

Additionally, here are the kernel cmdline options.

sfcal@timelord:~/Time-Appliance-Project$ cat /proc/cmdline
BOOT_IMAGE=/vmlinuz-6.8.9 root=/dev/mapper/ubuntu--vg-ubuntu--lv ro 8250.nr_uarts=8