DM365 OTG host configuration

Shlomo,

Have you used the Aarago DaVinci Staging Git kernel? OTG should be working on that kernel.

Can you provide more detail on the use case that you feel needs OTG?  The information would be really helpful..

regards

swami

We use OTG as host to communicate with a cellullar modem as as device to enbale us to configure our product using a PC.

We multiplex the OTG output to the USB jack and the internal modem based on the level of the ID pin.

Where can I find the Aarago DaVinci Staging Git kernel?

regards,

Shlomo

 

 

 

Shlomo,

I feel what you need is Dual role capabality and OTG provides other capabalities (such as HNP, SRP etc.) in addition to Dual Role capabality.

Pl. do try with the Aarago DaVinci staging tree for the OTG feature.  It should work.

regards

swami

Hi Swami,

I find that the git kernel only has two driver modes host and gadget. Shouldn't it also have a third OTG mode?

When I compiled the with latest version of the git kernel in host mode the usb driver failed to startup and the kernel disabled the usb clock.

When I compiled the system to work as host on the 2.6.35-rc5 of the git kernel it worked fine. When I configured it as a gadget it failed to compile the driver.

Any ideas?

Shlomo

 

 

 

Shlomo,

Can you try enabling Power Management (CONFIG_PM) in the kernel.  You should be able to see OTG config after doing this.

regards

swami

Hi Swami,

I can now see the OTG option. Thanks. I have now built the 2.6.32-rc5 kernel with this option and things are looking good.

When I set ID high and connect to a hub and mount the gadget file system I see the following:

usb_hdrc musb_hdrc: MUSB HDRC host driver
FATAL: Module gadgetfs not found.
musb_hdrc musb_hdrc: new USB bus registered, assigned bus number 3
usb usb3: New USB device found, idVendor=1d6b, idProduct=0002
usb usb3: New USB device strings: Mfr=3, Product=2, SerialNumber=1
usb usb3: Product: MUSB HDRC host driver
usb usb3: Manufacturer: Linux 2.6.32-rc5-svn4 musb-hcd
usb usb3: SerialNumber: musb_hdrc
usb usb3: configuration #1 chosen from 1 choice
hub 3-0:1.0: USB hub found
hub 3-0:1.0: 1 port detected
drivers/usb/musb/davinci.c musb_platform_enable: dma not reactivated

lsusb

Bus 001 Device 001: ID 1d6b:0002 Only after I mount gadgetfs.

I don't see the external hub.

when I set ID low and connect to a PC I see the device enumerate on the PC as a hub.

 

When I run my gadget application I see the following:

gadgetfs: bound to musb_hdrc driver
vendor:product 0musb_hdrc musb_hdrc: MUSB HDRC host driver
525:a4a4
vendor:product 0525:a4a4
epin = ep2in, epout=ep1out
musb_hdrc musb_hdrc: new USB bus registered, assigned bus number 2
usb usb2: New USB device found, idVendor=1d6b, idProduct=0002
usb usb2: New USB device strings: Mfr=3, Product=2, SerialNumber=1
usb usb2: Product: MUSB HDRC host driver
usb usb2: Manufacturer: Linux 2.6.32-rc5-svn4 musb-hcd
usb usb2: SerialNumber: musb_hdrc
usb usb2: configuration #1 chosen from 1 choice
hub 2-0:1.0: USB hub found
hub 2-0:1.0: 1 port detected
drivers/usb/musb/davinci.c musb_platform_enable: dma not reactivated
/dev/gadget/musb_hdrc ep0 configured

And I do not see the vendor product on my PC.

This application worked fine under 2.6.18 monatvista when configured as a gadget.

Any ideas?

BTW echo host > /sys/devices/platform/musb_hdrc/mode still has not been implemented.

Thank you for your prompt and helpful support.

-Shlomo

Hi Swami,

For our application we do not need the ability to dynamically switch between host and gadget. For normal operation we need the driver to be host and only if on startup we see that we have a device cable attached do we need to configure USB to be a device. We also need to use the 2.6.18 kernel for our application as the DVDSK doesn't yet support the open source kernel.

We could keep two copies of the musb_hdrc driver one configured as host and one configured as a gadget both of which we know works. One startup we can check the ID pin using gpio and load the appropriate driver.

Would this produce any unexpected problems?

Shlomo

 

When you set the ID line high it puts the controller in Device mode and you would not be able to see the HUB.  Can you provide details on your usb schematics information?  Driving the ID line low would put the controller in Host mode and you would be able to talk to the Hub.

regards

swami 

Hi Shlomo

can you please drop me a line at albertbu@gmail.com?

You may help me with a different USB issue I am having now

Thx

Albert

Hi Shlomo / ALbert

Even i am facing the same problem that  . I cannot access host devices when the driver mode is configured for OTG. I can however work as a device.

If you have solved it, please let me know the exact configuration.

I executed below command to change it to host mode. Please let me know whether this is the right method.

modprobe g_file_storage

echo F > /proc/driver/musb_hdrc

I am getting these errors after i configure it to host and plug a device to dm368.

musb_bus_suspend 2406: trying to suspend as a_host while active

usb 2-1: new high speed USB device using musb_hdrc and address 10

usb 2-1: device v0421 p0220 is not supported

hub 2-0:1.0: unable to enumerate USB device on port 1

Hi,

OTG support in Linux 2.6.37

I have enabled OTG support from menuconfig.
Driver Mode (Both host and peripheral: USB OTG (On The Go) Device) & USB Gadget Support .

make modules :-
<M> File-backed Storage Gadget
[*] File-backed Storage Gadget testing version
<M> Mass Storage Gadget

Load insmod g_mass_storage.ko file=/dev/mmcblk0p1 stall=0 removable=1 then is detected as peripheral.
but i connect pendrive as a host is not detected.

Log from musb_hdrc :-

----------------------------

root@dm365-evm:~# cat /proc/driver/musb_hdrc
Status: MHDRC, Mode=Peripheral (Power=20, DevCtl=98)
OTG state: b_idle; inactive
Options: cppi-dma, otg (peripheral+host), debug=0 [eps=5]
Peripheral address: 01
Root port status: 00000000
DaVinci: ctrl=00 stat=0 phy=21f0
rndis=00000 auto=0000 intsrc=00000000 intmsk=00000000
CPPI: txcr=1 txsrc=0 txena=f; rxcr=1 rxsrc=0 rxena=f
Gadget driver: (none)
ep0 (hw0): 1buf, csr 0000 maxp 0000
(queue empty)


Any missing from my side ?

Regards,
Tejas

Hi,
OTG support in Linux 2.6.37

I have enabled OTG support from menuconfig.
Driver Mode (Both host and peripheral: USB OTG (On The Go) Device) & USB Gadget Support .

make modules :-
<M> File-backed Storage Gadget
[*] File-backed Storage Gadget testing version
<M> Mass Storage Gadget

Load insmod g_mass_storage.ko file=/dev/mmcblk0p1 stall=0 removable=1 then is detected as peripheral.
but i connect pendrive as a host is not detected.
Log from musb_hdrc :-
----------------------------
root@dm365-evm:~# cat /proc/driver/musb_hdrc
Status: MHDRC, Mode=Peripheral (Power=20, DevCtl=98)
OTG state: b_idle; inactive
Options: cppi-dma, otg (peripheral+host), debug=0 [eps=5]
Peripheral address: 01
Root port status: 00000000
DaVinci: ctrl=00 stat=0 phy=21f0
rndis=00000 auto=0000 intsrc=00000000 intmsk=00000000
CPPI: txcr=1 txsrc=0 txena=f; rxcr=1 rxsrc=0 rxena=f
Gadget driver: (none)
ep0 (hw0): 1buf, csr 0000 maxp 0000
(queue empty)

Any missing from my side ?

Regards,
Tejas