Hello, here below information I read in "http://www.linux-usb.org/FAQ.html#ts1"; in order to report bugs: 1) cat /usr/src/linux/REPORTING-BUGS cat: /usr/src/linux/REPORTING-BUGS: No such file or directory 2) cat /proc/bus/input/devices I: Bus=001e Vendor=0000 Product=0000 Version=0001 N: Name="vc4-hdmi-0" P: Phys=vc4-hdmi-0/input0 S: Sysfs=/devices/platform/soc/fef00700.hdmi/rc/rc0/input0 U: Uniq= H: Handlers=kbd event0 B: PROP=20 B: EV=100017 B: KEY=ffffc000000000 3ff 0 400000320fc200 40830c900000000 0 210300 49d2c040ec00 1e378000000000 8010000010000000 B: REL=3 B: MSC=10 I: Bus=001e Vendor=0000 Product=0000 Version=0001 N: Name="vc4-hdmi-1" P: Phys=vc4-hdmi-1/input0 S: Sysfs=/devices/platform/soc/fef05700.hdmi/rc/rc1/input1 U: Uniq= H: Handlers=kbd event1 B: PROP=20 B: EV=100017 B: KEY=ffffc000000000 3ff 0 400000320fc200 40830c900000000 0 210300 49d2c040ec00 1e378000000000 8010000010000000 B: REL=3 B: MSC=10 3) cat /proc/bus/pci/devices 0000 14e42711 1f 0 0 0 0 0 0 0 0 0 0 0 0 0 0 pcieport 0100 11063483 22 600000004 0 0 0 0 0 0 1000 0 0 0 0 0 0 xhci_hcd 4) lsusb -v Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Device Descriptor: bLength 18 bDescriptorType 1 bcdUSB 2.00 bDeviceClass 9 Hub bDeviceSubClass 0 bDeviceProtocol 1 Single TT bMaxPacketSize0 64 idVendor 0x1d6b Linux Foundation idProduct 0x0002 2.0 root hub bcdDevice 6.01 iManufacturer 3 Linux 6.1.0-rpi7-rpi-v8 dwc2_hsotg iProduct 2 DWC OTG Controller iSerial 1 fe980000.usb bNumConfigurations 1 Configuration Descriptor: bLength 9 bDescriptorType 2 wTotalLength 0x0019 bNumInterfaces 1 bConfigurationValue 1 iConfiguration 0 bmAttributes 0xe0 Self Powered Remote Wakeup MaxPower 0mA Interface Descriptor: bLength 9 bDescriptorType 4 bInterfaceNumber 0 bAlternateSetting 0 bNumEndpoints 1 bInterfaceClass 9 Hub bInterfaceSubClass 0 bInterfaceProtocol 0 Full speed (or root) hub iInterface 0 Endpoint Descriptor: bLength 7 bDescriptorType 5 bEndpointAddress 0x81 EP 1 IN bmAttributes 3 Transfer Type Interrupt Synch Type None Usage Type Data wMaxPacketSize 0x0004 1x 4 bytes bInterval 12 Hub Descriptor: bLength 9 bDescriptorType 41 nNbrPorts 1 wHubCharacteristic 0x0008 Ganged power switching Per-port overcurrent protection TT think time 8 FS bits bPwrOn2PwrGood 1 * 2 milli seconds bHubContrCurrent 0 milli Ampere DeviceRemovable 0x00 PortPwrCtrlMask 0xff Hub Port Status: Port 1: 0000.0000 Device Status: 0x0001 Self Powered Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub Device Descriptor: bLength 18 bDescriptorType 1 bcdUSB 3.00 bDeviceClass 9 Hub bDeviceSubClass 0 bDeviceProtocol 3 bMaxPacketSize0 9 idVendor 0x1d6b Linux Foundation idProduct 0x0003 3.0 root hub bcdDevice 6.01 iManufacturer 3 Linux 6.1.0-rpi7-rpi-v8 xhci-hcd iProduct 2 xHCI Host Controller iSerial 1 0000:01:00.0 bNumConfigurations 1 Configuration Descriptor: bLength 9 bDescriptorType 2 wTotalLength 0x001f bNumInterfaces 1 bConfigurationValue 1 iConfiguration 0 bmAttributes 0xe0 Self Powered Remote Wakeup MaxPower 0mA Interface Descriptor: bLength 9 bDescriptorType 4 bInterfaceNumber 0 bAlternateSetting 0 bNumEndpoints 1 bInterfaceClass 9 Hub bInterfaceSubClass 0 bInterfaceProtocol 0 Full speed (or root) hub iInterface 0 Endpoint Descriptor: bLength 7 bDescriptorType 5 bEndpointAddress 0x81 EP 1 IN bmAttributes 3 Transfer Type Interrupt Synch Type None Usage Type Data wMaxPacketSize 0x0004 1x 4 bytes bInterval 12 bMaxBurst 0 Hub Descriptor: bLength 12 bDescriptorType 42 nNbrPorts 4 wHubCharacteristic 0x0009 Per-port power switching Per-port overcurrent protection bPwrOn2PwrGood 50 * 2 milli seconds bHubContrCurrent 0 milli Ampere bHubDecLat 0.0 micro seconds wHubDelay 0 nano seconds DeviceRemovable 0x00 Hub Port Status: Port 1: 0000.02a0 5Gbps power Rx.Detect Port 2: 0000.02a0 5Gbps power Rx.Detect Port 3: 0000.02a0 5Gbps power Rx.Detect Port 4: 0000.02a0 5Gbps power Rx.Detect Binary Object Store Descriptor: bLength 5 bDescriptorType 15 wTotalLength 0x000f bNumDeviceCaps 1 SuperSpeed USB Device Capability: bLength 10 bDescriptorType 16 bDevCapabilityType 3 bmAttributes 0x02 Latency Tolerance Messages (LTM) Supported wSpeedsSupported 0x0008 Device can operate at SuperSpeed (5Gbps) bFunctionalitySupport 1 Lowest fully-functional device speed is Full Speed (12Mbps) bU1DevExitLat 4 micro seconds bU2DevExitLat 231 micro seconds Device Status: 0x0001 Self Powered Bus 001 Device 002: ID 2109:3431 VIA Labs, Inc. Hub Device Descriptor: bLength 18 bDescriptorType 1 bcdUSB 2.10 bDeviceClass 9 Hub bDeviceSubClass 0 bDeviceProtocol 1 Single TT bMaxPacketSize0 64 idVendor 0x2109 VIA Labs, Inc. idProduct 0x3431 Hub bcdDevice 4.21 iManufacturer 0 iProduct 1 USB2.0 Hub iSerial 0 bNumConfigurations 1 Configuration Descriptor: bLength 9 bDescriptorType 2 wTotalLength 0x0019 bNumInterfaces 1 bConfigurationValue 1 iConfiguration 0 bmAttributes 0xe0 Self Powered Remote Wakeup MaxPower 100mA Interface Descriptor: bLength 9 bDescriptorType 4 bInterfaceNumber 0 bAlternateSetting 0 bNumEndpoints 1 bInterfaceClass 9 Hub bInterfaceSubClass 0 bInterfaceProtocol 0 Full speed (or root) hub iInterface 0 Endpoint Descriptor: bLength 7 bDescriptorType 5 bEndpointAddress 0x81 EP 1 IN bmAttributes 3 Transfer Type Interrupt Synch Type None Usage Type Data wMaxPacketSize 0x0001 1x 1 bytes bInterval 12 Hub Descriptor: bLength 9 bDescriptorType 41 nNbrPorts 4 wHubCharacteristic 0x00e0 Ganged power switching Ganged overcurrent protection TT think time 32 FS bits Port indicators bPwrOn2PwrGood 50 * 2 milli seconds bHubContrCurrent 100 milli Ampere DeviceRemovable 0x00 PortPwrCtrlMask 0xff Hub Port Status: Port 1: 0000.0100 power Port 2: 0000.0100 power Port 3: 0000.0100 power Port 4: 0000.0100 power Binary Object Store Descriptor: bLength 5 bDescriptorType 15 wTotalLength 0x002a bNumDeviceCaps 3 USB 2.0 Extension Device Capability: bLength 7 bDescriptorType 16 bDevCapabilityType 2 bmAttributes 0x00000002 HIRD Link Power Management (LPM) Supported SuperSpeed USB Device Capability: bLength 10 bDescriptorType 16 bDevCapabilityType 3 bmAttributes 0x00 wSpeedsSupported 0x000e Device can operate at Full Speed (12Mbps) Device can operate at High Speed (480Mbps) Device can operate at SuperSpeed (5Gbps) bFunctionalitySupport 1 Lowest fully-functional device speed is Full Speed (12Mbps) bU1DevExitLat 4 micro seconds bU2DevExitLat 231 micro seconds Container ID Device Capability: bLength 20 bDescriptorType 16 bDevCapabilityType 4 bReserved 0 ContainerID {30eef35c-07d5-2549-b001-802d79434c30} Device Status: 0x0001 Self Powered Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Device Descriptor: bLength 18 bDescriptorType 1 bcdUSB 2.00 bDeviceClass 9 Hub bDeviceSubClass 0 bDeviceProtocol 1 Single TT bMaxPacketSize0 64 idVendor 0x1d6b Linux Foundation idProduct 0x0002 2.0 root hub bcdDevice 6.01 iManufacturer 3 Linux 6.1.0-rpi7-rpi-v8 xhci-hcd iProduct 2 xHCI Host Controller iSerial 1 0000:01:00.0 bNumConfigurations 1 Configuration Descriptor: bLength 9 bDescriptorType 2 wTotalLength 0x0019 bNumInterfaces 1 bConfigurationValue 1 iConfiguration 0 bmAttributes 0xe0 Self Powered Remote Wakeup MaxPower 0mA Interface Descriptor: bLength 9 bDescriptorType 4 bInterfaceNumber 0 bAlternateSetting 0 bNumEndpoints 1 bInterfaceClass 9 Hub bInterfaceSubClass 0 bInterfaceProtocol 0 Full speed (or root) hub iInterface 0 Endpoint Descriptor: bLength 7 bDescriptorType 5 bEndpointAddress 0x81 EP 1 IN bmAttributes 3 Transfer Type Interrupt Synch Type None Usage Type Data wMaxPacketSize 0x0004 1x 4 bytes bInterval 12 Hub Descriptor: bLength 9 bDescriptorType 41 nNbrPorts 1 wHubCharacteristic 0x0009 Per-port power switching Per-port overcurrent protection TT think time 8 FS bits bPwrOn2PwrGood 10 * 2 milli seconds bHubContrCurrent 0 milli Ampere DeviceRemovable 0x02 PortPwrCtrlMask 0xff Hub Port Status: Port 1: 0000.0507 highspeed power suspend enable connect Device Status: 0x0001 Self Powered 5) sudo lspci -v 00:00.0 PCI bridge: Broadcom Inc. and subsidiaries BCM2711 PCIe Bridge (rev 20) (prog-if 00 [Normal decode]) Device tree node: /sys/firmware/devicetree/base/scb/pcie@7d500000/pci@0,0 Flags: bus master, fast devsel, latency 0, IRQ 31 Bus: primary=00, secondary=01, subordinate=01, sec-latency=0 Memory behind bridge: 00000000-000fffff [size=1M] [32-bit] Prefetchable memory behind bridge: [disabled] [64-bit] Capabilities: [48] Power Management version 3 Capabilities: [ac] Express Root Port (Slot-), MSI 00 Capabilities: [100] Advanced Error Reporting Capabilities: [180] Vendor Specific Information: ID=0000 Rev=0 Len=028 <?> Capabilities: [240] L1 PM Substates Kernel driver in use: pcieport 01:00.0 USB controller: VIA Technologies, Inc. VL805/806 xHCI USB 3.0 Controller (rev 01) (prog-if 30 [XHCI]) Subsystem: VIA Technologies, Inc. VL805/806 xHCI USB 3.0 Controller Device tree node: /sys/firmware/devicetree/base/scb/pcie@7d500000/pci@0,0/usb@0,0 Flags: bus master, fast devsel, latency 0, IRQ 34 Memory at 600000000 (64-bit, non-prefetchable) [size=4K] Capabilities: [80] Power Management version 3 Capabilities: [90] MSI: Enable+ Count=1/4 Maskable- 64bit+ Capabilities: [c4] Express Endpoint, MSI 00 Capabilities: [100] Advanced Error Reporting Kernel driver in use: xhci_hcd 6) uname -a Linux casettapi 6.1.0-rpi7-rpi-v8 #1 SMP PREEMPT Debian 1:6.1.63-1+rpt1 (2023-11-24) aarch64 GNU/Linux uname -r 6.1.0-rpi7-rpi-v8 Thank you very much in advance, Br Federico On Thu, Feb 15, 2024 at 6:08 PM Federico L <flicfloc@xxxxxxxxx> wrote: > > Hello, > > I put in place a "USB mass storage gadget" > and basically the device works like a charm. > For an entire day no issues at all, with my "dumb" device (a regular > soundbar), the USB-Host, access to it (USB mass storage gadget) just > like a regular "usb pen drive" without any kind of problem all the day > long. > The issue arises when the USB-host stops to access the usb mass > storage gadget for hours; > of course, during the night, the bar is powered off and does not play > sounds, but next morning when I turn it on again, there is no way to > let the bar access USB mass storage gadget > until I force a reboot of my Linux machine. > > Analyzing logs (dmesg mainly) does not show any kind of issue, error, > traceback or other, so I tried to investigate more in details, and I > discovered that the "virtual" usb port created by dwc2 driver (named, > in my case "fe980000.usb") hangs in "not attached" state forever; > finally found thanks to this command: > > cat /sys/class/udc/fe980000.usb/state > not attached > > I tried several Linux embedded utilities as well as, reset scripts > found on the the web, > in order to "reset" the device, the port, the hub, and even the full > usb-stack, but no way to > "restore" the right functionality of the virtual usb port, unless > you do a full fresh reboot. > After the reboot, the port goes in "not attached" and > immediately, when I power-on the USB host it goes in "configured" state and > works like a charm again. > > Among my several tests, I performed: > 1) > unbind/bind > > 2) > modprobe -r dwc2 > modprobe dwc2 > > 3) > modprobe -r g_mass_storage > modprobe g_mass_storage file=/piusb.bin stall=0 removable=y > > watching the results in the logs, and every command returns and performs > right, without any error, but the port still remains, always "not attached". > > In the end, I tried to create, by myself, a python script with this > content, and I was > pretty confident, to get the right result, cause I got in the dmesg logs, > almost the same identical output I get during a standard reboot: > > SyntaxEditor Code Snippet > > CMD_UNMOUNT1 = "modprobe -r g_mass_storage" > CMD_SYNC2 = "sync" > CMD_UNMOUNT3 = " modprobe -r dwc2" > CMD_MOUNT4 = "modprobe dwc2" > CMD_MOUNT5 = "modprobe g_mass_storage file=/piusb.bin stall=0 removable=y" > > os.system(CMD_UNMOUNT1) > time.sleep(30) > os.system(CMD_SYNC2) > time.sleep(30) > os.system(CMD_UNMOUNT3) > time.sleep(30) > os.system(CMD_MOUNT4) > time.sleep(30) > os.system(CMD_MOUNT5) > > With this python script I get this log from dmesg, and, this is really > almost identical to what I get from dmesg during a reboot: > > [Feb14 10:35] dwc2 fe980000.usb: remove, state 4 > [ +0.000052] usb usb3: USB disconnect, device number 1 > [ +0.004965] dwc2 fe980000.usb: USB bus 3 deregistered > [Feb14 10:36] dwc2 fe980000.usb: supply vusb_d not found, using dummy > regulator > [ +0.000972] dwc2 fe980000.usb: supply vusb_a not found, using dummy > regulator > [ +0.207690] dwc2 fe980000.usb: EPs: 8, dedicated fifos, 4080 entries in > SPRAM > [ +0.000173] dwc2 fe980000.usb: DWC OTG Controller > [ +0.000014] dwc2 fe980000.usb: new USB bus registered, assigned bus > number 3 > [ +0.000023] dwc2 fe980000.usb: irq 38, io mem 0xfe980000 > [ +0.000155] usb usb3: New USB device found, idVendor=1d6b, > idProduct=0002, bcdDevice= 6.01 > [ +0.000008] usb usb3: New USB device strings: Mfr=3, Product=2, > SerialNumber=1 > [ +0.000005] usb usb3: Product: DWC OTG Controller > [ +0.000005] usb usb3: Manufacturer: Linux 6.1.0-rpi7-rpi-v8 dwc2_hsotg > [ +0.000005] usb usb3: SerialNumber: fe980000.usb > [ +0.000315] hub 3-0:1.0: USB hub found > [ +0.000028] hub 3-0:1.0: 1 port detected > [ +30.033766] Mass Storage Function, version: 2009/09/11 > [ +0.000033] LUN: removable file: (no medium) > [ +0.000132] LUN: removable file: /piusb.bin > [ +0.000016] Number of LUNs=1 > [ +0.000271] g_mass_storage gadget.0: Mass Storage Gadget, version: > 2009/09/11 > [ +0.000020] g_mass_storage gadget.0: userspace failed to provide > iSerialNumber > [ +0.000013] g_mass_storage gadget.0: g_mass_storage ready > [ +0.000019] dwc2 fe980000.usb: bound driver g_mass_storage > [ +0.297414] dwc2 fe980000.usb: new device is full-speed > [ +0.363083] dwc2 fe980000.usb: new device is full-speed > [ +0.964163] dwc2 fe980000.usb: new device is full-speed > [ +0.964170] dwc2 fe980000.usb: new device is full-speed > > Looking at the log, I was pretty confident, but unfortunately, "cat > /sys/class/udc/fe980000.usb/state" still returns "not attached" > and power-on the soundbar has no change, it starts blinking as nothing is > attached. > Even running the script with the bar powered-on, you can see every > "cycle", as if you > manually, remove the cable, and at a time, you put the cable again > etc.. but no change, it starts blinking and "cat > /sys/class/udc/fe980000.usb/state" reamins "not attached". > > Something is still missing, so I asked some Linux expert and he told me to write > to the mailing list cause maybe a bug and, to complete, if I do the same action > with a regular usb-key mass storage pendrive, one hundred times, the > USB-host (soundbar) recognizes it immediately and starts playing with > no fault at all. > > Thank you very much in advance, > Best regards > Federico
