Date: Sat, 02 Aug 2008 21:06:27 -0400 From: Chuck Robey <chuckr@telenix.org> To: FreeBSD USB List <FreeBSD-usb@FreeBSD.org> Subject: handling a uhid device Message-ID: <48950493.6050407@telenix.org>
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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 [if I don't get an answer here in 2 days, I'll be reposting to hackers, probably] I have been taking a terribly long time figuring out the Xorg code, so that I can start coding the Xorg Xinput tablet input device driver (for FreeBSD) which I'm tackling. I finished all of the Xorg research, which means I know about 85% of the stuff for the Xorg side of the house, however, I need one question answered as far as FreeBSD's uhid driver is concerned. As far as my uhid code goes, after I do the configuration (which is about 75% FreeBSD lib code, but the libusbhid driver, I can't get it to totally work, so I wrote some custom workaround code for parts I couldn't get to work, and they test 100% good. I'm not sure, really, if it's my _my_ problem or FreeBSD's problem on the libusbhid code, and I've made enough screwups so that I won't make assumptions here on other's work. Anyhow, I have gotten to the point in Xorg Xinput code where I'm handling the reading (completely after all of the configuration, and separate from the parsing, separate from the USB descriptor code too). The Xorg code manages the uhid input like a regular serial line, including being able to use signals to tell of there's input waiting on the uhid for a read() to pick up (it doesn't just block like my simple test code does). My *question* is, is the mechanics of the uhid driver, as it relates to reading the input, just like a regular serial tty line, so one could use signals to see if a read()'s going to block or not? If it's like I expect it would be, that's really good news for me. If it's not, I gotta write a lot of special code for it. The test situation I'm in isn't the best, so I thought I would ask, instead of trying to write code to test this (I'm not all that good at such code, it would take me a good while to be sure of it). If you could answer me, I sure would appreciate it, really. Am I being clear in my question? -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.9 (FreeBSD) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iEYEARECAAYFAkiVBJMACgkQz62J6PPcoOkhvACfWrLWZKVuIDkGDIu/O2zdl2RQ 9RQAnjf+sGtf8ms7GmcCsJwogsgGzbWM =Bvf9 -----END PGP SIGNATURE-----
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