I am trying to integrate the TI WL1271 Wi-Fi module with a custom OMAP-L138 SOM board. We successfully tested the system using EVM modules and Linux kernel v3.3-rc7. I am now trying to get other subsystems running on our custom board with kernel-v3.3-rc7, but I am experiencing problems during USB device initialization. The Linux kernel is failing to enumerate the USB device and assign a user-space interface (i.e. ttyUSB0 ). When I execute "lsusb" nothing is returned. I have verified that VBUS power is applied to the device.
I was previously using kernel v2.6.32-rc6 successfully, but there was no board level support for the WL1271. This seemed to be properly added in v3.3.
Should I expect such problems with this kernel version 3.3 and OMAP-L138? Is CPPI41 DMA still supported for DA8xx devices? I can't seem to remove the MUSB_PIO_ONLY option, which I thought was the cause of this USB issue. At this point, I am curious if this is expected behavior or am I missing a configuration parameter.
Any help would be appreciated.
As you picked up non TI PSP released kernel so it doesn't have CPPI4.1 DMA support and only option is to use PIO mode. I would recommend to use TI PSP kernel for AM18x. The latest staging tree for AM18x is available at http://arago-project.org/git/projects/?p=linux-davinci.git;a=shortlog;h=refs/heads/davinci-next
And the last released tree based on v2.6.37 available at http://arago-project.org/git/projects/?p=linux-davinci.git;a=shortlog;h=refs/heads/usb_pio_plus_dma
In reply to Ajay:
Thanks for the information. The latest staging tree is working on our platform. There were a few compiler errors that I would like to share:
1. 'DAVINCI_SYSTEM_MODULE_BASE' undeclared in function dump_header_stats
drivers/usb/musb/musb_procfs.c: In function 'dump_header_stats':drivers/usb/musb/musb_procfs.c:517: error: 'DAVINCI_SYSTEM_MODULE_BASE' undeclared (first use in this function)drivers/usb/musb/musb_procfs.c:517: error: (Each undeclared identifier is reported only oncedrivers/usb/musb/musb_procfs.c:517: error: for each function it appears in.)make: *** [drivers/usb/musb/musb_procfs.o] Error 1
My solution was to define DAVINCI_SYSTEM_MODULE_BASE in /mach/hardware.h
2. MUSB_DA8XX_GLUE requires USB_GADGET support
drivers/built-in.o: In function `musb_gadget_cleanup':clkdev.c:(.text+0x7eb9c): undefined reference to `usb_del_gadget_udc'drivers/built-in.o: In function `musb_gadget_setup':clkdev.c:(.devinit.text+0x2ecc): undefined reference to `usb_add_gadget_udc'
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