Greg,
I compiled and insmod-ed the hello module and tried to run the test
application from my native linux pc and I am getting the same No such
device or address (6) error. I think I am doing something
fundamentally wrong here.
I will keep you posted. If you spot the issue before me, please do let
me know.
Thanks,
-Vijay
--- In "Vijay" <> wrote:
>
> Greg,
> I have added the (2.6) modified code to the following location.
>
>
http://code.google.com/p/toobo/source/browse/trunk/drivers/modules/glcd-2.6
>
> The test application I am using is the same that I wrote for the 2.4
> version.
>
>
http://code.google.com/p/toobo/source/browse/trunk/drivers/modules/glcd/test
>
> Currently, I do not have a script to automatically invoke insmod and
> grab the major number and mknod. I do this step by hand.
>
> For example, when I insmod, I print out what major number was
> allocated and then manually type in
> mknod /dev/glcd0 c 252 0
> [The above example assumes that I got a major number of 252 back when
> I insmod. I also make sure the major number is correct by cat-ing the
> /proc/devices file.]
>
> I have added a helloworld module and a test application and I see the
> same results with it. i.e. NO such device or address (6)
>
> I have uploaded it at,
>
>
http://code.google.com/p/toobo/source/browse/trunk/drivers/modules/hello-2.6
>
> I still haven't tried running it on my native linux box (x86) for
> comparison. But, I will keep you posted.
>
> Thanks for your help!
> -Vijay
>
> --- In "gbwtfo" <greg@> wrote:
> >
> > Vijay, please make available the 2.6 code. Additionally, please
> > double check the major number you gave to mknod as bungling it would
> > quite likely yield the same problem you are seeing.
> >
> > Greg
> >
> >
> > --- In "Vijay" <osembedded@> wrote:
> > >
> > > Guys,
> > > Could any of you help me with the following? I am creating a very
> > > basic 'hello world' driver module and a test app to make sure I
am not
> > > doing anything fundamentally wrong. But, if you guys have
experienced
> > > this issue before, please shed some light on it.
> > >
> > > Thanks,
> > > -Vijay
> > >
> > > --- In "Vijay" <osembedded@> wrote:
> > > >
> > > > Hi,
> > > > I had previously created a graphic lcd driver module and a test
> > > > application to run on the TS7250 on the 2.4 Kernel. Now, I have
> > > > installed 2.6 Kernel after compiling it. I am using nfsroot to
point
> > > > my root file system to my laptop.
> > > >
> > > > The board boots fine. I am able to insmod my 'ported' device
driver
> > > > using insmod and I see a major number being allocated
dynamically. I
> > > > then try to do lsmod and I am able to see the module in there. I
> used
> > > > mknod /dev/glcd0 c [MAJOR_NUM] 0 to create my device node. I
am able
> > > > to see it in the /proc/devices as well.
> > > >
> > > > But when I run the test app that I had written for the 2.4 kernel
> > > > version, I was expecting the same system calls like
open,close,ioctl
> > > > to work. But, for some reason, I cannot seem to open the device
> > > > located at /dev/glcd0. I get the following error message.
> > > >
> > > > Could not open /dev/glcd0: No such device or address (6)!
> > > >
> > > > See the following debug from "./strace display-test" [where
> > > > display-test is my test application which opens the device and
tries
> > > > to perform some ioctl commands]
> > > >
> > > > Any help is appreciated! I have been trying to solve this for a
> week
> > > > now in vain... I know tmpfs is a virtual file system in RAM. But,
> > > > could this issue be related to me mouting my rootfs via nfs?
> > > >
> > > > Thanks in Advance!
> > > > -Vijay
> > > >
> > > > ----- strace output [./strace display-test] -----
> > > >
> > > > execve("/home/proj/base/app/display-test/display-test",
> > > > ["/home/proj/base/app/display-test"...], [/* 14 vars */]) = 0
> > > > uname({sys="Linux", node="ts7800", ...}) = 0
> > > > brk(0) = 0x14000
> > > > access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such
file or
> > > > directory)
> > > > mmap2(NULL, 4096, PROT_READ|PROT_WRITE,
> MAP_PRIVATE|MAP_ANONYMOUS, -1,
> > > > 0) = 0x2aac0000
> > > > access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such
file or
> > > > directory)
> > > > open("/etc/ld.so.cache", O_RDONLY) = 3
> > > > fstat64(3, {st_mode=S_IFREG|0644, st_size=11247, ...}) = 0
> > > > mmap2(NULL, 11247, PROT_READ, MAP_PRIVATE, 3, 0) = 0x2aac1000
> > > > close(3) = 0
> > > > access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such
file or
> > > > directory)
> > > > open("/lib/libc.so.6", O_RDONLY) = 3
> > > > read(3,
"\177ELF\1\1\1a\0\0\0\0\0\0\0\0\3\0(\0\1\0\0\0HO\1\0004"...,
> > > > 512) = 512
> > > > fstat64(3, {st_mode=S_IFREG|0755, st_size=1091040, ...}) = 0
> > > > mmap2(NULL, 1128068, PROT_READ|PROT_EXEC,
MAP_PRIVATE|MAP_DENYWRITE,
> > > > 3, 0) = 0x2aac9000
> > > > mprotect(0x2abd0000, 50820, PROT_NONE) = 0
> > > > mmap2(0x2abd7000, 12288, PROT_READ|PROT_WRITE,
> > > > MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x106) = 0x2abd7000
> > > > mmap2(0x2abda000, 9860, PROT_READ|PROT_WRITE,
> > > > MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x2abda000
> > > > close(3) = 0
> > > > mprotect(0x2abd7000, 8192, PROT_READ) = 0
> > > > mprotect(0x2aac7000, 4096, PROT_READ) = 0
> > > > munmap(0x2aac1000, 11247) = 0
> > > > fstat64(1, {st_mode=S_IFREG|0644, st_size=1463, ...}) = 0
> > > > mmap2(NULL, 32768, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_ANONYMOUS,
> > > > -1, 0) = 0x2abdd000
> > > > open("/dev/glcd0", O_RDWR) = -1 ENXIO (No such
> device or
> > > > address)
> > > > write(1, "\nmain(+):\nopen_display(+):\nCould"..., 116
> > > > main(+):
> > > > open_display(+):
> > > > Could not open /dev/glcd0: No such device or address (6)!
> > > > main(): Could not Open display!) = 116
> > > > munmap(0x2abdd000, 32768) = 0
> > > > exit_group(-1) = ?
> > > > Process 803 detached
> > > >
> > >
> >
>
------------------------------------
Yahoo! Groups Links
<*> To visit your group on the web, go to:
http://groups.yahoo.com/group/ts-7000/
<*> Your email settings:
Individual Email | Traditional
<*> To change settings online go to:
http://groups.yahoo.com/group/ts-7000/join
(Yahoo! ID required)
<*> To change settings via email:
<*> To unsubscribe from this group, send an email to:
<*> Your use of Yahoo! Groups is subject to:
http://docs.yahoo.com/info/terms/
|