Re: [Ltib] Sierra 3G modem not working on Phytec Board. (/proc/bus/usb directory not found.)

[Quentin YANG]

Hi Srinivas,

Thanks for the quick reply.

1. I solved the " ' /proc/bus/usb' directory not found " problem by reconfiguring the linux 2.6.27.8 kernel in LTIB.

in \ltib-qs\rpm\BUILD\linux-2.6.27.8\.config file, there is one change as below:

"
...................................
#
# Miscellaneous USB options
#
CONFIG_USB_DEVICEFS=y
..................................

"

2. By changing the LTIB make configuration, using MDEV to creat nodes, now the UsbSerial node ( ttyUSB0) can be automatically created and removed when inserting and disconnecting 3G sierra modem. I DON'T HAVE TO run 'mdev -s' after I insert 'usbserial, sierra' modules.

'/dev/ttyUSB0' will turn up after inserting sierra 3G modem. It will disappear after disconnecting 3G sierra modem.

in \ltib-qs-svn-bkup\config\platform\phy3250\.config, there are 
following changes:
".......................
CONFIG_PKG_MDEV=y
.......................
CONFIG_SYSCFG_START_MDEV=y
......................
"

USB Endpoints 00,01,81 are turning up and disappearing with the connection and disconnection of 3G sierra modem without 'usbserial, sierra modules' being loaded. 

"/dev/usbdev1.3, 
/dev/usbdev1.3_ep00,
/dev/usbdev1.3_ep01,
/dev/usbdev1.3_ep81" 

are USB end points created and removed whenever plug-in and removING 3G sierra modem WITHOUT even installing 'usbserial, sierra modules'.


3. Now more important question is WHY THERE IS ONLY ONE PAIR OF USB END POINT APPEARED (i.e., ep01, ep81) ???  
    It suppose to have 7 pairs of end-points for sierra MC8790 3G modem MiniCard.

On linux PC, I can see 

/dev/usbdev1.2_ep00
/dev/usbdev1.2_ep01
/dev/usbdev1.2_ep02
/dev/usbdev1.2_ep03
/dev/usbdev1.2_ep04
/dev/usbdev1.2_ep05
/dev/usbdev1.2_ep06
/dev/usbdev1.2_ep07
/dev/usbdev1.2_ep81
/dev/usbdev1.2_ep82
/dev/usbdev1.2_ep83
/dev/usbdev1.2_ep84
/dev/usbdev1.2_ep85
/dev/usbdev1.2_ep86
/dev/usbdev1.2_ep87
/dev/usbdev1.2_ep88
/dev/usbdev1.2_ep89
/dev/usbdev1.2_ep8a
/dev/usbdev1.2_ep8b

And endpoint 1~7 are matching to ttyUSB0~6, in which ttyUSB3 is the port I can do AT commands on Linux PC.


On Phytec board, there are only USB end points (ep01,ep81).
They are created without 'insmod usbserial.ko, insmod sierra.ko'. 

So I think the PROBLEM IS WITH "pnx4008 OHCI" DRIVER, which I guess is the routine to create USB endpoints. 
Please correct me if I am wrong.



I attached the 'console log' from Phytec board. You can clearly see my board config information.

Looking forward to your reply.


Regards,
Quentin

On Mon, Jul 12, 2010 at 2:04 PM, Srinivas Bakki <address@hidden> wrote:

Hi Quentin,

                      Can you  try running "mdev -s"  after you insert usbserial and sierra mdules ?

 

Regards

Srinivas Bakki

 

From: ltib-bounces+srinivas.bakki=nxp.com@nongnu.org [mailto:ltib-bounces+srinivas.bakki=nxp.com@nongnu.org] On Behalf Of Quentin YANG
Sent: Monday, July 12, 2010 7:41 AM
To: address@hidden
Subject: [Ltib] Sierra 3G modem not working on Phytec Board. ()

 

Hi,


My Phytec board is running Linux (2.6.27.8) built from LTIB (LinuxTargetImageBuilder).

http://www.phytec.com/products/linux/bsp-LPC3250.html
http://ics.nxp.com/support/software/lpc32xx.bsp.linux/

http://www.bitshrine.org/ltib/


I can see usbserial, sierra modules are successfully compiled and created
using the console of Phytec board (using on board UART5 terminal as console)

./lib/modules/2.6.27.8/kernel/drivers/usb/serial/usbserial.ko
./lib/modules/2.6.27.8/kernel/drivers/usb/serial/sierra.ko

But after inserting 3G Modem MC8790V,

1. usbserial, sierra modules are not automatically installed after Kernel has detected new USB endpoints.

2. After manually installed the usbserial, sierra modules by 'insmod' command.
It shows 'ttyUSB0' is attached, but no 'ttyUSB0' node created under ' /dev '

3. Also, during boot-up, there is always message saying:

     '
          ............................
          Mounting filesystems
          mount: mounting usbfs on /proc/bus/usb failed: No such file or directory
          .........................
    '


I attached all print (TargetPhytecBoardLinuxPrint.txt) from Phytec Linux Console.

I suspect that I didnot config the kernel properly.
Do you have the recommend '.config' for Linux kernel compiling
so that Sierra Modem can work smoothly?

I attached the one (.config) I used to build Phytec Target Linux Image.
(I enabled usbserial driver, sierra wireless driver to be compiled as modules.
What other packages I must enabled to get Sierra Wireless Modem work?)

Thanks and hope you can spot something I've done wrong.

Regards,
Quentin

Phytec_Console_Log_MissingUsbEndPoints_for_Sierra3GModem.txt
Description: Text document