Re: [Gumstix-users] Getting an eCon Gumstix Camera Working

[Robert S. <sm...@tr...>]

Hello Ananth,

Thank you for your swift reply. Unfortunately, when I 'insmod' the kernel module I get a memory overlap error:

Driver Module info : V4l2 driver module
Version info : 5.0Build Time stamp: Thu Oct 7 05:40:10 2010
Memory overlap detected between camera reserved memory and kernel memory
phy_addr_start 0x85d00000 
phy_addr_end 0x862fffff 
phys_end_kernel 0x8dd00000 
Using Reserved memory for V4l2 driver module
>From Start address - 0x85d00000 
To End address - 0x862fffff 
insmod: error inserting 'v4l2_driver.ko': -1 Operation not permitted

I've doubled check by u-boot arguments, and they are as stated in the eCon Systems document (i.e. mem=93M@0x8000000 mem=128M@0x8800000. Any ideas?

Thanks
Rob Smith


----- Original Message ----- 
  From: Ananthapadmanaban 
  To: Robert Smith ; General mailing list for gumstix users. 
  Sent: Thursday, December 23, 2010 12:27 PM
  Subject: Re: [Gumstix-users] Getting an eCon Gumstix Camera Working


  Hi smith,
    Load the camera driver module.
  Thanks and regards,
  Ananth.

  On Thursday 23 December 2010 05:20 PM, Robert Smith wrote: 
    Hi There,

    I've got one of the eCon Systems gumstix camera, and can't quite get it to work. I wonder if anyone can help, before I pester the company...

    The problem I have is when trying to run the test application that comes with the driver code. When I run capture.elf, if just exits immediately, with no error messages, and writes to no logs as far as I can tell. So I don't really have any idea what is wrong. 

    So far I have done these steps:
    1. Patch and recompiled the kernel to include the driver in the kernel (not as a module)
    2. Booted the overo board, interrupted u-boot, and added the bootargs required to reserve memory
    3. Made a new node in /dev using mknod (mknod /dev/video0 c 81 0)
    4. And then run the capture.elf program (cross-compiled ok)

    I do believe the driver is installed correctly, as my dmesg output gives these messages:
    OMAPFB: allocated VRAM paddr 808d2000, vaddr d0a00000
    OMAPFB: region0 phys 808d2000 virt d0a00000 size=1572864
    OMAPFB: region1 phys 00000000 virt (null) size=0
    OMAPFB: region2 phys 00000000 virt (null) size=0
    OMAPFB: fbmems allocated
    OMAPFB: check_fb_var 0
    OMAPFB: max frame size 1572864, line size 2048
    OMAPFB: xres = 1024, yres = 768, vxres = 1024, vyres = 768
    OMAPFB: set_fb_fix
    OMAPFB: fb_infos initialized
    OMAPFB: set_par(0)
    OMAPFB: set_fb_fix
    OMAPFB: apply_changes, fb 0, ovl 0
    OMAPFB: setup_overlay 0, posx 0, posy 0, outw 1024, outh 768
    OMAPFB: paddr 808d2000, vaddr d0a00000
    OMAPFB: pan_display(0)
    OMAPFB: setcmap
    OMAPFB: setcmap
    Console: switching to colour frame buffer device 128x48
    OMAPFB: pan_display(0)
    OMAPFB: setcmap
    OMAPFB: setcmap
    OMAPFB: framebuffers registered
    OMAPFB: apply_changes, fb 0, ovl 0
    OMAPFB: setup_overlay 0, posx 0, posy 0, outw 1024, outh 768
    OMAPFB: paddr 808d2000, vaddr d0a00000
    OMAPFB: apply_changes, fb 1, ovl 1
    OMAPFB: apply_changes, fb 2, ovl 2
    OMAPFB: create sysfs for fbs
    OMAPFB: create sysfs for fbs
    OMAPFB: create_framebuffers done
    OMAPFB: mgr->apply'ed

    Does anyone have any ideas why the test program doesn't display the menu that the docs says it should?

    Thanks for any help
    Rob Smith

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