Errors while running on ulx3s

[soundnut]

Greetings, I've managed to load the gateware onto a ulx3s board but run into some errors while booting linux. While booting via serial port without an SD Card present I get these errors:

[ 24.479545] mmc0: Skipping voltage switch [ 24.505508] mmc0: Skipping voltage switch [ 24.533908] mmc0: Skipping voltage switch [ 24.549724] mmc0: Skipping voltage switch [ 24.569306] mmc0: Skipping voltage switch [ 24.589921] mmc0: Skipping voltage switch [ 24.609325] mmc0: Skipping voltage switch [ 24.641615] mmc0: Skipping voltage switch

adding an SD Card avoids the Skipping voltage switch messages but then I get these errors

[ 9.813537] Initramfs unpacking failed: invalid magic at start of compressed archive [ 10.885452] Freeing initrd memory: 8192K [ 10.963709] workingset: timestamp_bits=30 max_order=13 bucket_order=0 [ 12.708147] Block layer SCSI generic (bsg) driver version 0.4 loaded (major 253) [ 12.720843] io scheduler mq-deadline registered [ 12.729679] io scheduler kyber registered [ 12.816421] LiteX SoC Controller driver initialized: subreg:4, align:4 [ 20.001164] f0001000.serial: ttyLXU0 at MMIO 0x0 (irq = 0, base_baud = 0) is a liteuart [ 20.028736] printk: console [liteuart0] enabled [ 20.028736] printk: console [liteuart0] enabled [ 20.037965] printk: bootconsole [sbi0] disabled [ 20.037965] printk: bootconsole [sbi0] disabled [ 20.265007] libphy: Fixed MDIO Bus: probed [ 20.289828] i2c /dev entries driver [ 20.380371] litex-mmc f0004000.mmc: Requested clk_freq=12500000: set to 12500000 via div=4 [ 20.647790] NET: Registered protocol family 10 [ 21.731419] Command (cmd 8) failed, status 2 [ 22.735655] Command (cmd 55) failed, status 2 [ 23.739990] Command (cmd 55) failed, status 2 [ 24.744328] Command (cmd 55) failed, status 2 [ 25.748643] Command (cmd 55) failed, status 2 [ 26.753056] Command (cmd 1) failed, status 2 [ 26.757372] litex-mmc f0004000.mmc: Requested clk_freq=0: set to 195312 via div=256 [ 26.796348] Segment Routing with IPv6 [ 26.804988] sit: IPv6, IPv4 and MPLS over IPv4 tunneling driver [ 26.960523] Freeing unused kernel memory: 204K [ 26.964862] Kernel memory protection not selected by kernel config. [ 26.971821] Run /init as init process [ 30.405674] tmpfs: Unknown parameter 'mode' mount: mounting tmpfs on /dev/shm failed: Invalid argument [ 30.469423] tmpfs: Unknown parameter 'mode' mount: mounting tmpfs on /tmp failed: Invalid argument [ 30.533486] tmpfs: Unknown parameter 'mode' mount: mounting tmpfs on /run failed: Invalid argument Starting syslogd: [ 34.245435] litex-mmc f0004000.mmc: Requested clk_freq=12500000: set to 12500000 via div=4 [ 35.281997] Command (cmd 8) failed, status 2 [ 36.288165] Command (cmd 55) failed, status 2 [ 37.292461] Command (cmd 55) failed, status 2 [ 38.297067] Command (cmd 55) failed, status 2 [ 39.301388] Command (cmd 55) failed, status 2 [ 40.306086] Command (cmd 1) failed, status 2 [ 40.311978] litex-mmc f0004000.mmc: Requested clk_freq=0: set to 195312 via div=256 OK Starting klogd: OK Running sysctl: OK Saving random seed: [ 50.577315] random: dd: uninitialized urandom read (512 bytes read) OK Starting network: [ 52.365600] litex-mmc f0004000.mmc: Requested clk_freq=12500000: set to 12500000 via div=4 [ 53.404990] Command (cmd 8) failed, status 2 [ 54.409495] Command (cmd 55) failed, status 2 [ 55.413821] Command (cmd 55) failed, status 2 [ 56.419923] Command (cmd 55) failed, status 2 [ 57.424750] Command (cmd 55) failed, status 2 [ 58.429222] Command (cmd 1) failed, status 2 [ 58.433883] litex-mmc f0004000.mmc: Requested clk_freq=0: set to 195312 via div=256 OK

Welcome to Buildroot

The Command failed and clk_freq messages cycle over and over. I can enter commands in between but would like to get rid of these messages to really do something with it.

During another boot attempt I get these errors [ 80.131476] mmc0: card has unknown MMCA version 15 [ 80.136409] mmc0: error -22 whilst initialising MMC card [ 80.141037] litex-mmc f0004000.mmc: Requested clk_freq=0: set to 195312 via div=256 [ 81.216574] litex-mmc f0004000.mmc: Requested clk_freq=12500000: set to 12500000 via div=4 [ 81.256422] litex-mmc f0004000.mmc: card claims to support voltages below defined range [ 81.261612] litex-mmc f0004000.mmc: Requested clk_freq=0: set to 195312 via div=256 [ 81.305284] litex-mmc f0004000.mmc: Requested clk_freq=12500000: set to 12500000 via div=4

I've tried with 3 different SD Cards - they all behave the same way. (2GB and 4GB - re-formated to fat16)

Any ideas? Thanks

[troibe]

I encounter your second error on my ULX3S regardless of whether the SD-Card is inserted or not. One warning that I noticed was this one Max frequency for clock '$glbnet$main_clkout0' which for me was under 50Mhz.

For now disabling sdcard support by removing these two lines fixed the problems for me. https://github.com/litex-hub/linux-on-litex-vexriscv/blob/1da148d8e2b151bbb59ef816d8d5c517e58db811/make.py#L291-L292

[soundnut]

Thanks for the feedback/confirmation. I've had more luck with SaxonSoc but will try again with your proposed change.

[troibe]

Just found out that seems to be a common issue: https://github.com/litex-hub/linux-on-litex-vexriscv/issues/171#issuecomment-763728692 I'm looking into it some more. Maybe we can apply a similar fix for the ulx3s.

[troibe]

As this applies to both vexriscv and rocket I created an issue over on litex-boards.