On Thu, February 14, 2019 9:42 am, Greg KH wrote:
> That's because Android is using toybox's version of 'lsusb'. I
> recommend using the real version if you need this information.
I would if I could, I do not control the BSP for this hardware :-(
>> I have found the 'descriptors' file for the USB device under the '/sys'
>> interface, however this does not appear to contain the HUB specific
>> details.
>
> Really? It should, why does it not contain that information? That's a
> binary file that lists the USB descriptor information. You are going to
> have to "parse it by hand".
Attached is a snap-shot of a (random) hub on Desktop linux.
The 'HUB descriptor' is not contained within the 'descriptors' file from
the '/sys' interface, although I suspect that it can be accessed via
_another_ file within '/sys'.... hopefully someone can point me at it.
Decoding is not hard with the power of the interwebs:
https://eleccelerator.com/usbdescreqparser/
The 'descriptors' file from my suspect device (on Android) was attached to
original post.
Thanks,
Simon.
root@smart:/sys/bus/usb/devices/usb1/1-1/1-1.1# cat idProduct
0605
root@smart:/sys/bus/usb/devices/usb1/1-1/1-1.1# lsusb
Bus 002 Device 003: ID 045e:0040 Microsoft Corp. Wheel Mouse Optical
Bus 002 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 006 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 005 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 004: ID 05e3:0605 Genesys Logic, Inc. USB 2.0 Hub <-------------- this device
Bus 001 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 003 Device 002: ID 046d:c31c Logitech, Inc. Keyboard K120
Bus 003 Device 004: ID 18a5:0302 Verbatim, Ltd Flash Drive
Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
root@smart:/sys/bus/usb/devices/usb1/1-1/1-1.1# hexdump -C descriptors
00000000 12 01 00 02 09 00 01 40 e3 05 05 06 0b 06 00 01 |.......@........|
00000010 00 01 09 02 19 00 01 01 00 e0 32 09 04 00 00 01 |..........2.....|
00000020 09 00 00 00 07 05 81 03 01 00 0c |...........|
0000002b
root@smart:/sys/bus/usb/devices/usb1/1-1/1-1.1# lsusb -vv
...
Bus 001 Device 004: ID 05e3:0605 Genesys Logic, Inc. USB 2.0 Hub
Device Descriptor: <----------------------------- this is in the 'descriptors' file
bLength 18
bDescriptorType 1
bcdUSB 2.00
bDeviceClass 9 Hub
bDeviceSubClass 0 Unused
bDeviceProtocol 1 Single TT
bMaxPacketSize0 64
idVendor 0x05e3 Genesys Logic, Inc.
idProduct 0x0605 USB 2.0 Hub
bcdDevice 6.0b
iManufacturer 0
iProduct 1 USB2.0 Hub
iSerial 0
bNumConfigurations 1
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 25
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 Unused
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: <--------------------------- this does NOT appear in 'descriptors'.
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
Device Qualifier (for other device speed):
bLength 10
bDescriptorType 6
bcdUSB 2.00
bDeviceClass 9 Hub
bDeviceSubClass 0 Unused
bDeviceProtocol 0 Full speed (or root) hub
bMaxPacketSize0 64
bNumConfigurations 1
Device Status: 0x0001
Self Powered
...
Decode 'descriptors' via the interwebs...
https://eleccelerator.com/usbdescreqparser/
0x12, // bLength
0x01, // bDescriptorType (Device)
0x00, 0x02, // bcdUSB 2.00
0x09, // bDeviceClass (Hub)
0x00, // bDeviceSubClass
0x01, // bDeviceProtocol (High Speed Hub with single TT)
0x40, // bMaxPacketSize0 64
0xE3, 0x05, // idVendor 0x05E3
0x05, 0x06, // idProduct 0x0605
0x0B, 0x06, // bcdDevice 12.11
0x00, // iManufacturer (String Index)
0x01, // iProduct (String Index)
0x00, // iSerialNumber (String Index)
0x01, // bNumConfigurations 1
0x09, // bLength
0x02, // bDescriptorType (Configuration)
0x19, 0x00, // wTotalLength 25
0x01, // bNumInterfaces 1
0x01, // bConfigurationValue
0x00, // iConfiguration (String Index)
0xE0, // bmAttributes Remote Wakeup, Self Powered
0x32, // bMaxPower 100mA
0x09, // bLength
0x04, // bDescriptorType (Interface)
0x00, // bInterfaceNumber 0
0x00, // bAlternateSetting
0x01, // bNumEndpoints 1
0x09, // bInterfaceClass
0x00, // bInterfaceSubClass
0x00, // bInterfaceProtocol
0x00, // iInterface (String Index)
0x07, // bLength
0x05, // bDescriptorType (Endpoint)
0x81, // bEndpointAddress (IN/D2H)
0x03, // bmAttributes (Interrupt)
0x01, 0x00, // wMaxPacketSize 1
0x0C, // bInterval 12 (unit depends on device speed)
// 43 bytes
