Messages in this thread | | | Subject | [PATCH] Parallel port support for SGI O2 | From | Arnaud Giersch <> | Date | Sun, 23 Oct 2005 02:20:59 +0200 |
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Hello,
I wrote a low-level parallel port driver for the built-in port on SGI O2 (a.k.a. IP32).
The parallel port is driven by a standard ECP chipset, with memory-mapped I/O registers. That's why it was not possible to use the parport_pc module which assumes port-mapped I/O registers.
What works: * Basic modes are supported: PCSPP, PS2. * Compatibility mode with FIFO support is present. * FIFO can be driven with or without interrupts.
What does not work: * DMA support is not implemented (lack of documentation). If you have any information, please tell me. * EPP and ECP modes are not implemented (lack of interest). I currently do not own any peripheral supporting this extended modes. It should not be too difficult to do.
All tests were done with an HP LaserJet 5MP connected to a R5000 SGI O2.
The module is named parport_ip32. The patch is not included in this mail because it is not very small (2383 lines, 73 Kb). It is however avalaible from:
http://arnaud.giersch.free.fr/parport_ip32/parport_ip32-latest.patch.gz
The patch is against the latest Linux/MIPS kernel (2.6.14-rc2 as of today). If you prefer that I post it on a mailing list, please just tell me where, and how (inlined, or gzip'ed attached file).
Further informations are available on:
http://arnaud.giersch.free.fr/parport_ip32.html
Regards,
Arnaud Giersch - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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