am3517 usb otg

Dear Dapan Sun,

     i am facing problem with usb OTG(device and host) in my AM3517 EVM board. following are the setting in menuconfig  what i had done

I am using AM3517 sitara controller.  I am facing a problem with USB-OTG. I had made necessary changes in menuconfig following PSP Userguide from following link
"http://processors.wiki.ti.com/index.php/UserGuideUsbDriver_PSP_04_02_00_07#Gadget_Mode_Applications

RAJEEV BATTU,

Can you please provide /proc/config.gz? It seems the uImage you are running is not the one along with g_either.ko.

BIN LIU,

Thank you for your response. i had sorted out the problem by correctly configuring the kernel. 

Removed OMAP2430 and selected AM35x and also NOP USB transceiver driver.

<*> Inventra Highspeed Dual Role Controller (TI, ADI, ...)
           **** Platform Glue Layer ***
       <>     TUSB6010
       <>     OMAP2430 and onwards
       <*>     AM35x 
           Driver Mode (USB Peripheral (gadget stack)) --->
       [ ] Disable DMA (always use PIO)
       [*] Use System DMA for Mentor DMA workaround
       [*] Enable debugging messages

I dont have a file named config.gz in the directory  /proc/

root@devkit:~# ls /proc/c
cmdline  cpu/     cpuinfo  crypto

What i mean is config.gz is not in the directory of /proc/. what exactly is that we can get from config.gz.

Regards,

Rajeev.

To enable /proc/config.gz, add the following to .config and rebuild the uImage.

CONFIG_IKCONFIG=y
CONFIG_IKCONFIG_PROC=y

config.gz is compressed .config used to build the kernel. It can be used to check the configuration of the running kernel.

Bin Liu,

I had rebuilt the kernel with configuring

CONFIG_IKCONFIG=y
CONFIG_IKCONFIG_PROC=y

But how can we read the content in config.gz, when i tried to open with cat command, content is in different format.

find the attachment,

4606.config.gz

https://www.google.com/search?q=howto+read+.gz

Bin Liu,

Thank you for the quick response and patience . Can you clear one more doubt for me.

In my evaluation board AM3517 there is a  USB HUB  for 4 extra USB_HOSTS. With USB_HUB its working fine but when I try to connect directly without hub, i am unable to get detected my pendrive. can you please suggest me any link bat how to config the kernel.

Thanks in advance

Rajeev.

I am not sure about the USB HUB, I dont use it on am3517.

If you directly connect the pendrive to am3517, and do 'echo F > /proc/driver/musb_hdrc.0' in the serial console, does the pendrive get enumerated?

Bin Liu,

When i connected pendrive (4GB HP) without any hub, following are the debug messages on serial port. I think i should configure kernel to get detect the pendrive without HUB(GL850G IC)

 root@devkit:~# [  396.993164] hub 2-0:1.0: Cannot enable port 1.  Maybe the USB cable is bad?
[  400.071380] hub 2-0:1.0: Cannot enable port 1.  Maybe the USB cable is bad?
[  403.149566] hub 2-0:1.0: Cannot enable port 1.  Maybe the USB cable is bad?
[  406.228149] hub 2-0:1.0: Cannot enable port 1.  Maybe the USB cable is bad?
[  406.235870] ehci-omap ehci-omap.0: port 1 cannot be enabled
[  406.241729] ehci-omap ehci-omap.0: Maybe your device is not a high speed device?
[  406.249511] ehci-omap ehci-omap.0: USB host (EHCI) controller does not support full speed or low speed device on it's root port.
[  406.261688] ehci-omap ehci-omap.0: Please connect full/low speed device via a high speed hub.
[  406.270660] hub 2-0:1.0: unable to enumerate USB device on port 1

root@devkit:~# echo F > /proc/driver/musb_hdrc.0

Bin Liu,

The error i posted is due to  DP and DM pin connections swapping, "Error: Maybe the USB cable is bad?"

Following is the error after correct hardware connections.

root@devkit:~# [   49.269653] usb 1-1: new high speed USB device using ehci-omap and address 2
[   49.434631] usb 1-1: device descriptor read/all, error -75
[   49.558715] usb 1-1: new high speed USB device using ehci-omap and address 3
[   49.723876] usb 1-1: device descriptor read/all, error -75
[   49.847778] usb 1-1: new high speed USB device using ehci-omap and address 4
[   50.269653] usb 1-1: device not accepting address 4, error -71
[   50.394653] usb 1-1: new high speed USB device using ehci-omap and address 5
[   50.427368] usb 1-1: device descriptor read/all, error -75
[   50.433197] ehci-omap ehci-omap.0: port 1 cannot be enabled
[   50.439086] ehci-omap ehci-omap.0: Maybe your device is not a high speed device?
[   50.446868] ehci-omap ehci-omap.0: USB host (EHCI) controller does not support full speed or low speed device on it's root port.
[   50.459014] ehci-omap ehci-omap.0: Please connect full/low speed device via a high speed hub.
[   50.467987] hub 1-0:1.0: unable to enumerate USB device on port 1

USB is not enumarated on port 1 is the debug mesg.

when i run following command no error or mesg is displayed

root@devkit:~# echo "F" > /proc/driver/musb_hdrc.0
root@devkit:~# echo $?
0

Thnaks,

Rajeev.

I guess I am confused:

>> [   50.446868] ehci-omap ehci-omap.0: USB host (EHCI) controller does not support full speed or low speed device on it's root port.
>> [   50.459014] ehci-omap ehci-omap.0: Please connect full/low speed device via a high speed hub.

You are not using the OTG, but the EHCI which only supports high speed devices.

You said you use the TI EVM, why DP/DM is swapped? You have done any h/w mod?

Bin Liu,

Yes i had Designed my own baseboard on that DP and DM are wrongly connected, I made that correction and tested with pendrive, i got errors.

Please find the attachment for error log.

Thanks,

Rajeev.0880.usb_host_errror.txt