am3517 usb otg

dapan sun

Other Parts Discussed in Thread: AM3517

hi，I use am3517 to design Products,I use AM35x-OMAP35x-LINUX-PSP-04.02.00.07 BSP, the usb device worked at high speed mode default,but i want to use full speed mode,I found am3517 have no registers to change usb device to work at full speed mode,how can i do? thank you for answer.

over 13 years ago

0 Rajeev over 13 years ago

Expert 1355 points

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

"

Following is what i have done along with schematic.

Configuration for USB controller and CDC/RNDIS Gadget in Makemenuconfig

    USB phy selection for MUSB OTG port
    Please select NOP USB transceiver for MUSB support.

    Device Drivers --->
    USB support --->
    *** OTG and related infrastructure ***
    [ ] GPIO based peripheral-only VBUS sensing 'transceiver'
    [ ] Philips ISP1301 with OMAP OTG
    [ ] TWL4030 USB Transceiver Driver
    [*] NOP USB Transceiver Driver

    Device Drivers --->
    USB support --->
    <*> Support for USB Gadgets
    USB Peripheral Controller (Inventra HDRC Peripheral (TI, ...)) --->
    <M> USB Gadget Drivers
    <M> Ethernet Gadget
    [*]   RNDIS support (EXPERIMENTAL) (NEW)

       <*> 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

make ARCH=arm CROSS_COMPILE=arm-none-linux-gnueabi- uImage
make ARCH=arm CROSS_COMPILE=arm-none-linux-gnueabi- modules
make ARCH=arm modules_install INSTALL_MOD_PATH=/media/46fe61eb-d3ea-4813-9e18-45bf7cd72a18/

Dmesg after booting of system.

[    1.427398] usbcore: registered new interface driver cdc_ether
[    1.433807] usbcore: registered new interface driver cdc_eem
[    1.439788] usbmon: debugfs is not available
[    1.444305] ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver
[    1.451293] usbcore: registered new interface driver cdc_acm
[    1.457244] cdc_acm: v0.26:USB Abstract Control Model driver for USB modems and ISDN adapters
[    1.466430] usbcore: registered new interface driver cdc_wdm
[    1.472625] usbcore: registered new interface driver uas
[    1.478240] Initializing USB Mass Storage driver...
[    1.483612] usbcore: registered new interface driver usb-storage
[    1.489898] USB Mass Storage support registered.

when i tried to insert the module.
root@devkit:~# insmod /lib/modules/2.6.37/kernel/drivers/usb/gadget/g_ether.ko
insmod: can't insert '/lib/modules/2.6.37/kernel/drivers/usb/gadget/g_ether.ko': No such device

root@devkit:~# lsmod
Module                  Size Used by    Tainted: G
bufferclass_ti          4883 0
omaplfb                 8134 0
pvrsrvkm              153648 2 bufferclass_ti,omaplfb
libertas_sdio         134576 0
root@devkit:~#
Please find the attachment for USB schematic

0 Bin Liu over 13 years ago in reply to Rajeev

TI__Guru**** 167191 points

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.

0 Rajeev over 13 years ago in reply to Bin Liu

Expert 1355 points

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.

0 Bin Liu over 13 years ago in reply to Rajeev

TI__Guru**** 167191 points

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.

0 Rajeev over 13 years ago in reply to Bin Liu

Expert 1355 points

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

0 Bin Liu over 13 years ago in reply to Rajeev

TI__Guru**** 167191 points

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

0 Rajeev over 13 years ago in reply to Bin Liu

Expert 1355 points

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.

0 Bin Liu over 13 years ago in reply to Rajeev

TI__Guru**** 167191 points

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?

0 Rajeev over 13 years ago in reply to Bin Liu

Expert 1355 points

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

0 Rajeev over 13 years ago in reply to Rajeev

Expert 1355 points

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.

0 Bin Liu over 13 years ago in reply to Rajeev

TI__Guru**** 167191 points

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?

0 Rajeev over 13 years ago in reply to Bin Liu

Expert 1355 points

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

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am3517 usb otg