Greetings!
I've come to you because I stumbled upon an impasse while attempting to make the USB3 device work in my company's custom SBC project, which uses Actions Semiconductor's S700 SoC.
First, the context: since the chip was discontinued, the manufacturer stopped updating the kernel source, so it was stuck in version 3.something. The USB3 subsystem used to work with the manufacturer's code at that point, but so many new features were added to the mainline that we had to move on to newer versions.
Right now, we are using Debian's patched version of the 6.1.76 kernel. Our repo is public at github.com/caninos-loucos/labrador-linux-6 . We implemented the device tree nodes, glue layer and PHY code on the usb3 branch. Some code is from the old repo (the phys especially), some was adapted to the more modern format.
The problem: Only a few devices (keyboard, mouse and some pendrives) work correctly using the usb3 port, and only when they are connected before the modules load. Otherwise, the device stops at the stop endpoint command and the whole XHCI module dies. I tried to debug using the guide at kernel.org/doc/html/latest/driver-api/usb/dwc3.html, but I was quickly overwhelmed by how complex this system is. I followed the commands
but tracefs returned nothing from dwc3 and the regdump is incomprehensible to me, since I don't have access to the IP handbook. I tried more ways to access the trace, and even enabled all functions, but I'm mostly sure that the aforementioned command works just fine.
# mkdir -p /d
# mkdir -p /t
# mount -t debugfs none /d
# mount -t tracefs none /t
# echo 81920 > /t/buffer_size_kb
# echo 1 > /t/events/dwc3/enable
# cp /t/trace /root/trace.txt
# cat /d/usb/*dwc3*/regdump > /root/regdump.txt <--- this had to be modified
The regdump.txt file attached to this email shows the dump after connecting a generic USB pendrive and waiting for the dmesg output:
[ 90.800444] xhci-hcd xhci-hcd.0.auto: xHCI host not responding to stop endpoint command
[ 90.828621] xhci-hcd xhci-hcd.0.auto: xHCI host controller not responding, assume dead
[ 90.836534] xhci-hcd xhci-hcd.0.auto: HC died; cleaning up
[ 90.842256] usb usb3-port1: couldn't allocate usb_device
[ 90.828621] xhci-hcd xhci-hcd.0.auto: xHCI host controller not responding, assume dead
[ 90.836534] xhci-hcd xhci-hcd.0.auto: HC died; cleaning up
[ 90.842256] usb usb3-port1: couldn't allocate usb_device
Can you guys lend me a hand?
Many thanks!
Ana Clara Forcelli
Firmware Developer at Caninos Loucos - LSI-TEC
GSBUSCFG0 = 0x00000008 GSBUSCFG1 = 0x00000f00 GTXTHRCFG = 0x00000000 GRXTHRCFG = 0x00000000 GCTL = 0x30c11401 GEVTEN = 0x00000000 GSTS = 0x3e800002 GUCTL1 = 0x00000000 GSNPSID = 0x5533240a GGPIO = 0x00000000 GUID = 0x0006014c GUCTL = 0x02008010 GBUSERRADDR0 = 0x00000000 GBUSERRADDR1 = 0x00000000 GPRTBIMAP0 = 0x00000000 GPRTBIMAP1 = 0x00000000 GHWPARAMS0 = 0x2020400a GHWPARAMS1 = 0x81e0c918 GHWPARAMS2 = 0x0005211a GHWPARAMS3 = 0x0514a085 GHWPARAMS4 = 0x48822008 GHWPARAMS5 = 0x04202088 GHWPARAMS6 = 0x076e8020 GHWPARAMS7 = 0x03080550 GDBGFIFOSPACE = 0x00820000 GDBGLTSSM = 0x01550462 GDBGBMU = 0x20300010 GPRTBIMAP_HS0 = 0x00000000 GPRTBIMAP_HS1 = 0x00000000 GPRTBIMAP_FS0 = 0x00000000 GPRTBIMAP_FS1 = 0x00000000 GUSB2PHYCFG(0) = 0x00002548 GUSB2PHYCFG(1) = 0x00000000 GUSB2PHYCFG(2) = 0x00000000 GUSB2PHYCFG(3) = 0x00000000 GUSB2PHYCFG(4) = 0x00000000 GUSB2PHYCFG(5) = 0x00000000 GUSB2PHYCFG(6) = 0x00000000 GUSB2PHYCFG(7) = 0x00000000 GUSB2PHYCFG(8) = 0x00000000 GUSB2PHYCFG(9) = 0x00000000 GUSB2PHYCFG(10) = 0x00000000 GUSB2PHYCFG(11) = 0x00000000 GUSB2PHYCFG(12) = 0x00000000 GUSB2PHYCFG(13) = 0x00000000 GUSB2PHYCFG(14) = 0x00000000 GUSB2PHYCFG(15) = 0x00000000 GUSB2I2CCTL(0) = 0x00000000 GUSB2I2CCTL(1) = 0x00000000 GUSB2I2CCTL(2) = 0x00000000 GUSB2I2CCTL(3) = 0x00000000 GUSB2I2CCTL(4) = 0x00000000 GUSB2I2CCTL(5) = 0x00000000 GUSB2I2CCTL(6) = 0x00000000 GUSB2I2CCTL(7) = 0x00000000 GUSB2I2CCTL(8) = 0x00000000 GUSB2I2CCTL(9) = 0x00000000 GUSB2I2CCTL(10) = 0x00000000 GUSB2I2CCTL(11) = 0x00000000 GUSB2I2CCTL(12) = 0x00000000 GUSB2I2CCTL(13) = 0x00000000 GUSB2I2CCTL(14) = 0x00000000 GUSB2I2CCTL(15) = 0x00000000 GUSB2PHYACC(0) = 0x00000000 GUSB2PHYACC(1) = 0x00000000 GUSB2PHYACC(2) = 0x00000000 GUSB2PHYACC(3) = 0x00000000 GUSB2PHYACC(4) = 0x00000000 GUSB2PHYACC(5) = 0x00000000 GUSB2PHYACC(6) = 0x00000000 GUSB2PHYACC(7) = 0x00000000 GUSB2PHYACC(8) = 0x00000000 GUSB2PHYACC(9) = 0x00000000 GUSB2PHYACC(10) = 0x00000000 GUSB2PHYACC(11) = 0x00000000 GUSB2PHYACC(12) = 0x00000000 GUSB2PHYACC(13) = 0x00000000 GUSB2PHYACC(14) = 0x00000000 GUSB2PHYACC(15) = 0x00000000 GUSB3PIPECTL(0) = 0x010e0202 GUSB3PIPECTL(1) = 0x00000000 GUSB3PIPECTL(2) = 0x00000000 GUSB3PIPECTL(3) = 0x00000000 GUSB3PIPECTL(4) = 0x00000000 GUSB3PIPECTL(5) = 0x00000000 GUSB3PIPECTL(6) = 0x00000000 GUSB3PIPECTL(7) = 0x00000000 GUSB3PIPECTL(8) = 0x00000000 GUSB3PIPECTL(9) = 0x00000000 GUSB3PIPECTL(10) = 0x00000000 GUSB3PIPECTL(11) = 0x00000000 GUSB3PIPECTL(12) = 0x00000000 GUSB3PIPECTL(13) = 0x00000000 GUSB3PIPECTL(14) = 0x00000000 GUSB3PIPECTL(15) = 0x00000000 GTXFIFOSIZ(0) = 0x00000082 GTXFIFOSIZ(1) = 0x00820103 GTXFIFOSIZ(2) = 0x01850205 GTXFIFOSIZ(3) = 0x038a0022 GTXFIFOSIZ(4) = 0x03ac0000 GTXFIFOSIZ(5) = 0x00000000 GTXFIFOSIZ(6) = 0x00000000 GTXFIFOSIZ(7) = 0x00000000 GTXFIFOSIZ(8) = 0x00000000 GTXFIFOSIZ(9) = 0x00000000 GTXFIFOSIZ(10) = 0x00000000 GTXFIFOSIZ(11) = 0x00000000 GTXFIFOSIZ(12) = 0x00000000 GTXFIFOSIZ(13) = 0x00000000 GTXFIFOSIZ(14) = 0x00000000 GTXFIFOSIZ(15) = 0x00000000 GTXFIFOSIZ(16) = 0x00000000 GTXFIFOSIZ(17) = 0x00000000 GTXFIFOSIZ(18) = 0x00000000 GTXFIFOSIZ(19) = 0x00000000 GTXFIFOSIZ(20) = 0x00000000 GTXFIFOSIZ(21) = 0x00000000 GTXFIFOSIZ(22) = 0x00000000 GTXFIFOSIZ(23) = 0x00000000 GTXFIFOSIZ(24) = 0x00000000 GTXFIFOSIZ(25) = 0x00000000 GTXFIFOSIZ(26) = 0x00000000 GTXFIFOSIZ(27) = 0x00000000 GTXFIFOSIZ(28) = 0x00000000 GTXFIFOSIZ(29) = 0x00000000 GTXFIFOSIZ(30) = 0x00000000 GTXFIFOSIZ(31) = 0x00000000 GRXFIFOSIZ(0) = 0x00000084 GRXFIFOSIZ(1) = 0x00840104 GRXFIFOSIZ(2) = 0x01880180 GRXFIFOSIZ(3) = 0x00000000 GRXFIFOSIZ(4) = 0x00000000 GRXFIFOSIZ(5) = 0x00000000 GRXFIFOSIZ(6) = 0x00000000 GRXFIFOSIZ(7) = 0x00000000 GRXFIFOSIZ(8) = 0x00000000 GRXFIFOSIZ(9) = 0x00000000 GRXFIFOSIZ(10) = 0x00000000 GRXFIFOSIZ(11) = 0x00000000 GRXFIFOSIZ(12) = 0x00000000 GRXFIFOSIZ(13) = 0x00000000 GRXFIFOSIZ(14) = 0x00000000 GRXFIFOSIZ(15) = 0x00000000 GRXFIFOSIZ(16) = 0x00000000 GRXFIFOSIZ(17) = 0x00000000 GRXFIFOSIZ(18) = 0x00000000 GRXFIFOSIZ(19) = 0x00000000 GRXFIFOSIZ(20) = 0x00000000 GRXFIFOSIZ(21) = 0x00000000 GRXFIFOSIZ(22) = 0x00000000 GRXFIFOSIZ(23) = 0x00000000 GRXFIFOSIZ(24) = 0x00000000 GRXFIFOSIZ(25) = 0x00000000 GRXFIFOSIZ(26) = 0x00000000 GRXFIFOSIZ(27) = 0x00000000 GRXFIFOSIZ(28) = 0x00000000 GRXFIFOSIZ(29) = 0x00000000 GRXFIFOSIZ(30) = 0x00000000 GRXFIFOSIZ(31) = 0x00000000 GEVNTADRLO(0) = 0x00000000 GEVNTADRHI(0) = 0x00000000 GEVNTSIZ(0) = 0x00000000 GEVNTCOUNT(0) = 0x00000000 GHWPARAMS8 = 0x0000076e DCFG = 0x00080804 DCTL = 0x00f00000 DEVTEN = 0x00000000 DSTS = 0x00560004 DGCMDPAR = 0x00000000 DGCMD = 0x00000000 DALEPENA = 0x00000000 DEPCMDPAR2(0) = 0x00000000 DEPCMDPAR1(0) = 0x00000002 DEPCMDPAR0(0) = 0x0cb66001 DEPCMD(0) = 0x00000000 DEPCMDPAR2(1) = 0x00000000 DEPCMDPAR1(1) = 0x00000000 DEPCMDPAR0(1) = 0x00000000 DEPCMD(1) = 0x00000000 DEPCMDPAR2(2) = 0x0cb67000 DEPCMDPAR1(2) = 0x00000000 DEPCMDPAR0(2) = 0x00000040 DEPCMD(2) = 0x00000000 DEPCMDPAR2(3) = 0x00000000 DEPCMDPAR1(3) = 0x00000000 DEPCMDPAR0(3) = 0x00000000 DEPCMD(3) = 0x00000000 DEPCMDPAR2(4) = 0x0cb64000 DEPCMDPAR1(4) = 0x00000000 DEPCMDPAR0(4) = 0x0cb65048 DEPCMD(4) = 0x00000000 DEPCMDPAR2(5) = 0x00000000 DEPCMDPAR1(5) = 0x00000000 DEPCMDPAR0(5) = 0x00000000 DEPCMD(5) = 0x00000000 DEPCMDPAR2(6) = 0x00000000 DEPCMDPAR1(6) = 0x00000000 DEPCMDPAR0(6) = 0x00000000 DEPCMD(6) = 0x00000000 DEPCMDPAR2(7) = 0x00000000 DEPCMDPAR1(7) = 0x00000000 DEPCMDPAR0(7) = 0x00000000 DEPCMD(7) = 0x00000000 DEPCMDPAR2(8) = 0x00000000 DEPCMDPAR1(8) = 0x00000000 DEPCMDPAR0(8) = 0x00000000 DEPCMD(8) = 0x00000000 DEPCMDPAR2(9) = 0x00000000 DEPCMDPAR1(9) = 0x00000000 DEPCMDPAR0(9) = 0x00000000 DEPCMD(9) = 0x00000000 DEPCMDPAR2(10) = 0x00000000 DEPCMDPAR1(10) = 0x00000000 DEPCMDPAR0(10) = 0x00000000 DEPCMD(10) = 0x00000000 DEPCMDPAR2(11) = 0x00000000 DEPCMDPAR1(11) = 0x00000000 DEPCMDPAR0(11) = 0x00000000 DEPCMD(11) = 0x00000000 DEPCMDPAR2(12) = 0x00000000 DEPCMDPAR1(12) = 0x00000000 DEPCMDPAR0(12) = 0x00000000 DEPCMD(12) = 0x00000000 DEPCMDPAR2(13) = 0x00000000 DEPCMDPAR1(13) = 0x00000000 DEPCMDPAR0(13) = 0x00000000 DEPCMD(13) = 0x00000000 DEPCMDPAR2(14) = 0x00000000 DEPCMDPAR1(14) = 0x00000000 DEPCMDPAR0(14) = 0x00000000 DEPCMD(14) = 0x00000000 DEPCMDPAR2(15) = 0x00000000 DEPCMDPAR1(15) = 0x00000000 DEPCMDPAR0(15) = 0x00000000 DEPCMD(15) = 0x00000000 DEPCMDPAR2(16) = 0x00000000 DEPCMDPAR1(16) = 0x00000000 DEPCMDPAR0(16) = 0x00000000 DEPCMD(16) = 0x00000000 DEPCMDPAR2(17) = 0x00000000 DEPCMDPAR1(17) = 0x00000000 DEPCMDPAR0(17) = 0x00000000 DEPCMD(17) = 0x00000000 DEPCMDPAR2(18) = 0x00000000 DEPCMDPAR1(18) = 0x00000000 DEPCMDPAR0(18) = 0x00000000 DEPCMD(18) = 0x00000000 DEPCMDPAR2(19) = 0x00000000 DEPCMDPAR1(19) = 0x00000000 DEPCMDPAR0(19) = 0x00000000 DEPCMD(19) = 0x00000000 DEPCMDPAR2(20) = 0x00000000 DEPCMDPAR1(20) = 0x00000000 DEPCMDPAR0(20) = 0x00000000 DEPCMD(20) = 0x00000000 DEPCMDPAR2(21) = 0x00000000 DEPCMDPAR1(21) = 0x00000000 DEPCMDPAR0(21) = 0x00000000 DEPCMD(21) = 0x00000000 DEPCMDPAR2(22) = 0x00000000 DEPCMDPAR1(22) = 0x00000000 DEPCMDPAR0(22) = 0x00000000 DEPCMD(22) = 0x00000000 DEPCMDPAR2(23) = 0x00000000 DEPCMDPAR1(23) = 0x00000000 DEPCMDPAR0(23) = 0x00000000 DEPCMD(23) = 0x00000000 DEPCMDPAR2(24) = 0x00000000 DEPCMDPAR1(24) = 0x00000000 DEPCMDPAR0(24) = 0x00000000 DEPCMD(24) = 0x00000000 DEPCMDPAR2(25) = 0x00000000 DEPCMDPAR1(25) = 0x00000000 DEPCMDPAR0(25) = 0x00000000 DEPCMD(25) = 0x00000000 DEPCMDPAR2(26) = 0x00000000 DEPCMDPAR1(26) = 0x00000000 DEPCMDPAR0(26) = 0x00000000 DEPCMD(26) = 0x00000000 DEPCMDPAR2(27) = 0x00000000 DEPCMDPAR1(27) = 0x00000000 DEPCMDPAR0(27) = 0x00000000 DEPCMD(27) = 0x00000000 DEPCMDPAR2(28) = 0x00000000 DEPCMDPAR1(28) = 0x00000000 DEPCMDPAR0(28) = 0x00000000 DEPCMD(28) = 0x00000000 DEPCMDPAR2(29) = 0x00000000 DEPCMDPAR1(29) = 0x00000000 DEPCMDPAR0(29) = 0x00000000 DEPCMD(29) = 0x00000000 DEPCMDPAR2(30) = 0x00000000 DEPCMDPAR1(30) = 0x00000000 DEPCMDPAR0(30) = 0x00000000 DEPCMD(30) = 0x00000000 DEPCMDPAR2(31) = 0x00000000 DEPCMDPAR1(31) = 0x00000000 DEPCMDPAR0(31) = 0x00000000 DEPCMD(31) = 0x00000000 OCFG = 0x00000000 OCTL = 0x00000000 OEVT = 0x00000000 OEVTEN = 0x00000000 OSTS = 0x00000000
