HD3SS3220: Request SCH review: AM57x: SS is not working

Depending on the device, I've seen the following kernel error when plugged in the "BAD" direction.

[65792.461651] usb usb2-port1: Cannot enable. Maybe the USB cable is bad?

1: C63/C65 are not needed

2: what mode for the design, DRP ? a vbus switch is required for DRP and DFP

2: nor pullup for ID pin

1. thanks I will try without them.  Do they hurt?

2. The vbus switch should be U14 correct?

3. Yeah I enabled pullup in the pinmux to work around it but I agree it should be popped.

Is there any steps I can take to diagnose why SS isn't working?

1: yes, it's out of AC spec

2: ID is used to control Vbus switch. ID should low first then turn on Vbus.

1. Okay thanks.

2. ID is going to the AM57x which is using USB1_DRVVBUS connected to USB1_VbusEnable to enable VBUS.  This all appears to be working.

Drat, still no SS link

root@mitysom-am57x:~# [  231.976098] xhci-hcd xhci-hcd.1.auto: xHCI Host Controller
[  231.983355] xhci-hcd xhci-hcd.1.auto: new USB bus registered, assigned bus number 3
[  231.995235] xhci-hcd xhci-hcd.1.auto: hcc params 0x0220f04c hci version 0x100 quirks 0x0000000002010010
[  232.004886] xhci-hcd xhci-hcd.1.auto: irq 178, io mem 0x48890000
[  232.011439] usb usb3: New USB device found, idVendor=1d6b, idProduct=0002, bcdDevice= 4.19
[  232.021317] usb usb3: New USB device strings: Mfr=3, Product=2, SerialNumber=1
[  232.028853] usb usb3: Product: xHCI Host Controller
[  232.034010] usb usb3: Manufacturer: Linux 4.19.79-00321-g29f24c68c0de-dirty xhci-hcd
[  232.042014] usb usb3: SerialNumber: xhci-hcd.1.auto
[  232.047286] hub 3-0:1.0: USB hub found
[  232.051082] hub 3-0:1.0: 1 port detected
[  232.057163] xhci-hcd xhci-hcd.1.auto: xHCI Host Controller
[  232.063320] xhci-hcd xhci-hcd.1.auto: new USB bus registered, assigned bus number 4
[  232.071025] xhci-hcd xhci-hcd.1.auto: Host supports USB 3.0 SuperSpeed
[  232.078776] usb usb4: We don't know the algorithms for LPM for this host, disabling LPM.
[  232.087240] usb usb4: New USB device found, idVendor=1d6b, idProduct=0003, bcdDevice= 4.19
[  232.095781] usb usb4: New USB device strings: Mfr=3, Product=2, SerialNumber=1
[  232.103296] usb usb4: Product: xHCI Host Controller
[  232.108195] usb usb4: Manufacturer: Linux 4.19.79-00321-g29f24c68c0de-dirty xhci-hcd
[  232.116380] usb usb4: SerialNumber: xhci-hcd.1.auto
[  232.122275] hub 4-0:1.0: USB hub found
[  232.126089] hub 4-0:1.0: 1 port detected
[  232.130981] prueth pruss2_eth: port 1: using random MAC addr: c2:db:7c:df:58:da
[  232.831611] usb 3-1: new high-speed USB device number 2 using xhci-hcd
[  233.012662] usb 3-1: New USB device found, idVendor=090c, idProduct=1000, bcdDevice=11.00
[  233.020881] usb 3-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[  233.028684] usb 3-1: Product: Flash Drive
[  233.033042] usb 3-1: Manufacturer: Samsung
[  233.037158] usb 3-1: SerialNumber: 0315420010005422
[  233.046477] prueth pruss2_eth: port 1: using random MAC addr: b6:25:3d:a9:64:88
[  233.095865] usb-storage 3-1:1.0: USB Mass Storage device detected
[  233.102777] scsi host1: usb-storage 3-1:1.0
[  233.108373] prueth pruss2_eth: port 1: using random MAC addr: 8e:6f:e8:07:77:ba
[  233.111975] usbcore: registered new interface driver usb-storage
[  233.124854] usbcore: registered new interface driver uas
[  234.508831] scsi 1:0:0:0: Direct-Access     Samsung  Flash Drive      1100 PQ: 0 ANSI: 6
[  234.522549] prueth pruss2_eth: port 1: using random MAC addr: 6a:6b:29:7b:8c:65
[  234.526379] sd 1:0:0:0: [sda] 62656641 512-byte logical blocks: (32.1 GB/29.9 GiB)
[  234.538320] sd 1:0:0:0: [sda] Write Protect is off
[  234.546660] sd 1:0:0:0: [sda] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA

[  234.566343]  sda: sda1
[  234.572385] sd 1:0:0:0: [sda] Attached SCSI removable disk
root@mitysom-am57x:~# lsusb -t
/:  Bus 04.Port 1: Dev 1, Class=root_hub, Driver=xhci-hcd/1p, 5000M
/:  Bus 03.Port 1: Dev 1, Class=root_hub, Driver=xhci-hcd/1p, 480M
    |__ Port 1: Dev 2, If 0, Class=Mass Storage, Driver=usb-storage, 480M
/:  Bus 02.Port 1: Dev 1, Class=root_hub, Driver=xhci-hcd/1p, 5000M
/:  Bus 01.Port 1: Dev 1, Class=root_hub, Driver=xhci-hcd/1p, 480M
    |__ Port 1: Dev 2, If 0, Class=Vendor Specific Class, Driver=, 480M

Found an issue with our hardware.  We have crossed the RX and TX since we were looking at a reference design which goes to a hub.  Going to try to unswap them tomorrow and hopefully that improves things.

Do you know if the AM57x has the ability to swap RX and TX in the PHY?  I wasn't able to find anything in the TRM so I assume not.

I don't know AM57x , but for USB3, you can't swap TX and RX.