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USB Keyboard with built in hub works on B+ but not A+
Posted: Tue Mar 10, 2015 6:03 pm
by Outten
I have all of the Pi revisions.
I have been using a USB keyboard with 2 port built in hub.
This works in default on the B+, but not at all on the A+
Is there a way to allow the full 500ma out to A+ USB port, on the old Model B this was as easy as removing the Poly fuses.
I am using a good quality 5V 2A PSU for ALL my Pi's
With thanks in advance.
Re: USB Keyboard with built in hub works on B+ but not A+
Posted: Tue Mar 10, 2015 8:23 pm
by jdb
Can you post a lsusb -v with the device plugged into your B+?
Re: USB Keyboard with built in hub works on B+ but not A+
Posted: Wed Mar 11, 2015 12:42 am
by Outten
I am sorry but lsusb -v will print a verbose output on the B+ & the device works on the B+ both the B+ & A+ are using the same PSU & the same micro SD.
More useful would be lsusb on the A+, as this would show the device isn't there (unpowered or underpowered)
Confirmed other keyboards work.
Re: USB Keyboard with built in hub works on B+ but not A+
Posted: Wed Mar 11, 2015 6:36 am
by rpdom
Outten wrote:I am sorry but lsusb -v will print a verbose output on the B+ & the device works on the B+ both the B+ & A+ are using the same PSU & the same micro SD.
More useful would be lsusb on the A+, as this would show the device isn't there (unpowered or underpowered)
Confirmed other keyboards work.
lsusb on the B+ will give details of the device that might help with debugging why the A+ doesn't recognise it.
Re: USB Keyboard with built in hub works on B+ but not A+
Posted: Wed Mar 11, 2015 10:36 am
by Outten
As you wish:
lsusb -v
Code: Select all
Bus 001 Device 002: ID 0424:9514 Standard Microsystems Corp.
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 2.00
bDeviceClass 9 Hub
bDeviceSubClass 0 Unused
bDeviceProtocol 2 TT per port
bMaxPacketSize0 64
idVendor 0x0424 Standard Microsystems Corp.
idProduct 0x9514
bcdDevice 2.00
iManufacturer 0
iProduct 0
iSerial 0
bNumConfigurations 1
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 41
bNumInterfaces 1
bConfigurationValue 1
iConfiguration 0
bmAttributes 0xe0
Self Powered
Remote Wakeup
MaxPower 2mA
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 1
bInterfaceClass 9 Hub
bInterfaceSubClass 0 Unused
bInterfaceProtocol 1 Single TT
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
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 1
bNumEndpoints 1
bInterfaceClass 9 Hub
bInterfaceSubClass 0 Unused
bInterfaceProtocol 2 TT per port
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 5
wHubCharacteristic 0x000d
Per-port power switching
Compound device
Per-port overcurrent protection
TT think time 8 FS bits
bPwrOn2PwrGood 50 * 2 milli seconds
bHubContrCurrent 1 milli Ampere
DeviceRemovable 0x02
PortPwrCtrlMask 0xff
Hub Port Status:
Port 1: 0000.0503 highspeed power enable connect
Port 2: 0000.0100 power
Port 3: 0000.0103 power enable connect
Port 4: 0000.0503 highspeed power enable connect
Port 5: 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
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 Unused
bDeviceProtocol 1 Single TT
bMaxPacketSize0 64
idVendor 0x1d6b Linux Foundation
idProduct 0x0002 2.0 root hub
bcdDevice 3.18
iManufacturer 3 Linux 3.18.7+ dwc_otg_hcd
iProduct 2 DWC OTG Controller
iSerial 1 bcm2708_usb
bNumConfigurations 1
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 25
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 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 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: 0000.0503 highspeed power enable connect
Device Status: 0x0001
Self Powered
Bus 001 Device 003: ID 0424:ec00 Standard Microsystems Corp.
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 2.00
bDeviceClass 255 Vendor Specific Class
bDeviceSubClass 0
bDeviceProtocol 1
bMaxPacketSize0 64
idVendor 0x0424 Standard Microsystems Corp.
idProduct 0xec00
bcdDevice 2.00
iManufacturer 0
iProduct 0
iSerial 0
bNumConfigurations 1
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 39
bNumInterfaces 1
bConfigurationValue 1
iConfiguration 0
bmAttributes 0xe0
Self Powered
Remote Wakeup
MaxPower 2mA
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 3
bInterfaceClass 255 Vendor Specific Class
bInterfaceSubClass 0
bInterfaceProtocol 255
iInterface 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x81 EP 1 IN
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0200 1x 512 bytes
bInterval 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x02 EP 2 OUT
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0200 1x 512 bytes
bInterval 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x83 EP 3 IN
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x0010 1x 16 bytes
bInterval 4
Device Qualifier (for other device speed):
bLength 10
bDescriptorType 6
bcdUSB 2.00
bDeviceClass 255 Vendor Specific Class
bDeviceSubClass 0
bDeviceProtocol 1
bMaxPacketSize0 64
bNumConfigurations 1
Device Status: 0x0001
Self Powered
Bus 001 Device 004: ID 05e3:0606 Genesys Logic, Inc. USB 2.0 Hub / D-Link DUB-H4 USB 2.0 Hub
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 2.00
bDeviceClass 9 Hub
bDeviceSubClass 0 Unused
bDeviceProtocol 0 Full speed (or root) hub
bMaxPacketSize0 8
idVendor 0x05e3 Genesys Logic, Inc.
idProduct 0x0606 USB 2.0 Hub / D-Link DUB-H4 USB 2.0 Hub
bcdDevice 7.02
iManufacturer 1
iProduct 2 USB Hub 2.0
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 255
Hub Descriptor:
bLength 9
bDescriptorType 41
nNbrPorts 4
wHubCharacteristic 0x0009
Per-port power switching
Per-port overcurrent protection
bPwrOn2PwrGood 22 * 2 milli seconds
bHubContrCurrent 100 milli Ampere
DeviceRemovable 0x00
PortPwrCtrlMask 0xff
Hub Port Status:
Port 1: 0000.0100 power
Port 2: 0000.0303 lowspeed power enable connect
Port 3: 0000.0100 power
Port 4: 0000.0100 power
Device Status: 0x0001
Self Powered
Bus 001 Device 005: ID 148f:2573 Ralink Technology, Corp. RT2501/RT2573 Wireless Adapter
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 2.00
bDeviceClass 0 (Defined at Interface level)
bDeviceSubClass 0
bDeviceProtocol 0
bMaxPacketSize0 64
idVendor 0x148f Ralink Technology, Corp.
idProduct 0x2573 RT2501/RT2573 Wireless Adapter
bcdDevice 0.01
iManufacturer 1 Ralink
iProduct 2 54M.USB.......
iSerial 0
bNumConfigurations 1
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 32
bNumInterfaces 1
bConfigurationValue 1
iConfiguration 0
bmAttributes 0x80
(Bus Powered)
MaxPower 300mA
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 2
bInterfaceClass 255 Vendor Specific Class
bInterfaceSubClass 255 Vendor Specific Subclass
bInterfaceProtocol 255 Vendor Specific Protocol
iInterface 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x81 EP 1 IN
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0200 1x 512 bytes
bInterval 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x01 EP 1 OUT
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0200 1x 512 bytes
bInterval 0
Device Qualifier (for other device speed):
bLength 10
bDescriptorType 6
bcdUSB 2.00
bDeviceClass 0 (Defined at Interface level)
bDeviceSubClass 0
bDeviceProtocol 0
bMaxPacketSize0 64
bNumConfigurations 1
Device Status: 0x0000
(Bus Powered)
Bus 001 Device 006: ID 04d9:1702 Holtek Semiconductor, Inc.
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 1.10
bDeviceClass 0 (Defined at Interface level)
bDeviceSubClass 0
bDeviceProtocol 0
bMaxPacketSize0 8
idVendor 0x04d9 Holtek Semiconductor, Inc.
idProduct 0x1702
bcdDevice 1.01
iManufacturer 1
iProduct 2 USB Keyboard
iSerial 0
bNumConfigurations 1
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 59
bNumInterfaces 2
bConfigurationValue 1
iConfiguration 0
bmAttributes 0xa0
(Bus Powered)
Remote Wakeup
MaxPower 100mA
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 1
bInterfaceClass 3 Human Interface Device
bInterfaceSubClass 1 Boot Interface Subclass
bInterfaceProtocol 1 Keyboard
iInterface 0
HID Device Descriptor:
bLength 9
bDescriptorType 33
bcdHID 1.10
bCountryCode 0 Not supported
bNumDescriptors 1
bDescriptorType 34 Report
wDescriptorLength 62
Report Descriptors:
** UNAVAILABLE **
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x81 EP 1 IN
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x0008 1x 8 bytes
bInterval 10
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 1
bAlternateSetting 0
bNumEndpoints 1
bInterfaceClass 3 Human Interface Device
bInterfaceSubClass 0 No Subclass
bInterfaceProtocol 0 None
iInterface 0
HID Device Descriptor:
bLength 9
bDescriptorType 33
bcdHID 1.10
bCountryCode 0 Not supported
bNumDescriptors 1
bDescriptorType 34 Report
wDescriptorLength 101
Report Descriptors:
** UNAVAILABLE **
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x82 EP 2 IN
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x0008 1x 8 bytes
bInterval 10
Device Status: 0x0000
(Bus Powered)
Re: USB Keyboard with built in hub works on B+ but not A+
Posted: Wed Mar 11, 2015 10:39 am
by Outten
To be clear, the B+ had the SD card & the PSU from the A+ (swapped them)
I have managed to do what I was aiming, by moving the SD card from A+ to B+ configure the wireless adaptor (shown in the LSUSB dump) & put it back into the A+. But is a worry I couldn't configure it directly on the A+.
Re: USB Keyboard with built in hub works on B+ but not A+
Posted: Wed Mar 11, 2015 11:02 am
by jdb
The hub inside your keyboard is only connecting at full-speed. Presumably someone has tied off the "be a high-speed hub" pin inside the device.
The USB port in full-speed mode with downstream low-speed devices attached via a hub are not a supportable configuration on Raspberry Pi due to limitations with the USB PHY.
On the A+, if you plugged a high-speed hub in and then plugged the keyboard into that, the configuration would work.
Re: USB Keyboard with built in hub works on B+ but not A+
Posted: Wed Mar 11, 2015 2:19 pm
by Outten
Hi Sorry, I am aware of those limitations.
I am not plugging any devices into the keyboard when it is attached to either the A+ or B+.
The device works (as a keyboard) on the B+ but not on the A+
I do not carry further hubs as mostly all my PI's are configured as headless.
Even with the downstream limitations of the USB IC (for smartphones etc.)
The keyboard should still work on the A+, it does not; therefore I assume there is some further hardware limitation between the B+ & A+
Please advise
Re: USB Keyboard with built in hub works on B+ but not A+
Posted: Wed Mar 11, 2015 2:30 pm
by Outten
The Keyboard is connected directly to Device bus 001 for both A+ & B+
Neither config uses the Hub. ie:
Bus 001 Device 002: ID 0424:9514 Standard Microsystems Corp.
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
iSerial 1 bcm2708_usb
Bus 001 Device 003: ID 0424:ec00 Standard Microsystems Corp.
Bus 001 Device 004: ID 05e3:0606 Genesys Logic, Inc. USB 2.0 Hub / D-Link DUB-H4 USB 2.0 Hub
bInterfaceProtocol 0 Full speed (or root) hub
Hub Port Status:
Port 1: 0000.0100 power
Port 2: 0000.0303 lowspeed power enable connect
Port 3: 0000.0100 power
Port 4: 0000.0100 power
Bus 001 Device 005: ID 148f:2573 Ralink Technology, Corp. RT2501/RT2573 Wireless Adapter
Bus 001 Device 006: ID 04d9:1702 Holtek Semiconductor, Inc.
bDeviceProtocol 0
iProduct 2 USB Keyboard
bInterfaceClass 3 Human Interface Device
bInterfaceSubClass 1 Boot Interface Subclass
bInterfaceProtocol 1 Keyboard
As you can see the problems stated in down stream support are irrelevant, as no devices are connected to the `Full Speed` hub. The keyboard works on the B+, but A+ alas no banana.
With regards
Re: USB Keyboard with built in hub works on B+ but not A+
Posted: Wed Mar 11, 2015 2:33 pm
by Aydan
do a "lsusb -t" and you will see that the B+ has a hub inside the LAN chip.
Regards
Aydan
Re: USB Keyboard with built in hub works on B+ but not A+
Posted: Wed Mar 11, 2015 2:56 pm
by fruitoftheloom
Aydan wrote:do a "lsusb -t" and you will see that the B+ has a hub inside the LAN chip.
Regards
Aydan
Further to above post the USB Hub / Ethernet use the
http://www.microchip.com/wwwproducts/De ... ct=LAN9514
Therefore the A+ & B+ are different as jdb stated
Re: USB Keyboard with built in hub works on B+ but not A+
Posted: Wed Mar 11, 2015 3:28 pm
by pluggy
There are differences between how the USB behaves on the B family (B,B+,2) of Pis and the A family (A,A+). I've posted about it several times, but never got much attention, I've just accepted it now. It has never been a priority to look into it I reckon. Stuff that works fine on the Bs not working on the As is common in my experience.