Messages in this thread | | | Date | Wed, 30 May 2007 09:46:52 +0200 | From | "Lars K.W. Gohlke" <> | Subject | Re: How to access correctly serial port inside module? |
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Lars K.W. Gohlke schrieb: > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA1 > > Tilman Schmidt schrieb: >> Am 24.05.2007 21:15 schrieb Lars K.W. Gohlke: >>> Jan Engelhardt schrieb: >> [code proposal] >>>> [I've warned about it... ;-) ] >>> is it the way to access from kernelspace the userspace fs? >>> the not-correct-way? >> >> Yes, indeed. >> >>> If it is so, I will wait for another solution ;) >> >> I'm not sure waiting will help. The roasted pigeons will not come >> flying into your mouth. >> >> The possible solutions have been sketched out for you: >> >> a) open the device file from the kernel (described by Jan): >> actively discouraged by the kernelnewbies.org FAQ document, >> and probably won't even work IMHO >> >> b) program the serial port directly (described by Jan): >> will work only with one type of hardware and you'll have to >> disable the regular serial driver first; frowned upon by kernel >> gurus as "reinventing the wheel" >> >> c) abuse the line discipline interface (described by me): >> moderately well documented, and there's precedent for using it >> that way in the well-accepted PPP module as well as my humble >> contribution, the ser_gigaset driver; requires a userspace >> daemon for pushing the line discipline module on the serial >> port and keeping it there >> >> d) use the serio interface (described by Ying Huang): >> potentially cleaner conceptually and seems to work without a >> userspace daemon, but apparently not documented anywhere >> except in the source files drivers/input/serio/serport.c >> and linux/drivers/input/mouse/sermouse.c >> >> Now it's your turn to decide. >> >> HTH >> T. >> > > When I'm chosing option d) can smb. help me step by step? There are so > many pieces of code I don't understand. > > Ok, let's begin: > > my kernel source base is : ubuntu-lts 6.06 and 2.6.15-7 > http://git.kernel.org/?p=linux/kernel/git/stable/linux-2.6.15.y.git;a=tree;f=drivers/input/serio; > > > -----BEGIN PGP SIGNATURE----- > Version: GnuPG v1.4.3 (MingW32) - GPGrelay v0.959 > > iD8DBQFGXSKoAAomYJ1taN8RApggAJ99t+yMvPScr4yhOoTOS9TvYVUMsgCeJAbI > nGTvFGb49gUOzJG17Nmypq4= > =K4W8 > -----END PGP SIGNATURE-----
[linux/drivers/input/mouse/sermouse.c]
Where can I see, which serial line is used to get data stream from?
The mouse is plugged in. Where is the decision made, that maybe port0 is used? -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.3 (MingW32) - GPGrelay v0.959
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