File:  [NetBSD Developer Wiki] / wikisrc / users / macallan.mdwn
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Wed Jan 13 09:59:42 2010 UTC (9 years ago) by wiki
Branches: MAIN
CVS tags: HEAD
web commit by macallan

## Personal crap you always wanted to know but never dared to ask
yeah, right

## Stuff I'm to blame for
* rewrote the interrupt handling code in [[macppc]], made it machine independent enough to work on other PowerPC platforms as well
* rewrote the ADB subsystem used on [[macppc]] and probably [[mac68k]] - no more phantom events, keyboard LEDs work now, mouse button emulation, support for [[cuda]]'s i2c bus, all in all it's much smaller and simpler than the old code
* wrote a bunch of graphical console drivers ( see below )
* wrote a bunch of Xorg/XFree86 drivers
* added generic support for virtual consoles, scrollback buffers etc. to wscons
* [[wscons]]-ified [[sparc64]]
* added provision to allow console drivers to be machine independent
* made [[Xorg]] work on [[macppc]], [[shark]], [[sgimips]], [[sparc]] and [[sparc64]]
* craploads of bugfixes and other minor improvements

### Drivers I wrote:
* [[cuda]] - the microcontroller found on older PCI PowerMacs, provides ADB, realtime clock, nvram, power control and in some cases an i2c bus
* [[pmu]] - the microcontroller found in PowerBooks, iBooks and newer pre-G5 PowerMacs, provides realtime clock, nvram, power control and sometimes ADB, battery, environmental sensors or volume and brightness control
* [[nadb]] - ADB device discovery, attached to [[cuda]] or [[pmu]]
* [[adbkbd]] - driver for ADB keyboards, includes emulation for mouse buttons 2 and 3
* [[adbms]] - driver for ADB mice and trackpads. Supports tapping on trackpads.
* [[adbbt]] - driver for volume, brightness etc. control keys found on some PowerBooks and all(?) iBooks
* [[sgsmix]] - additional mixer chip found in beige G3 Macs, supports additional bass and treble control, requires [[cuda]] since it's controlled via i2c which the old ADB subsystem does not support
* [[dbri]] - a driver for the ISDN / audio chip found in the SPARCstation 20 and SPARCbook 3GX, it's audio only, there is no support for the ISDN part
* [[panel]] - driver for the buttons on the SGI Indy's front panel
* [[agten]] - accelerated console driver for Fujitsu [[AG-10e]] SBus graphics boards
* [[chipsfb]] - accelerated console driver for Chips & Technologies 65550 graphics controllers
* [[genfb]] - a generic framebuffer console driver. Depends on machine-dependent code to pass setup information as device properties
* [[gfb]] - dumb framebuffer console driver for Sun [[XVR-1000]] graphics boards
* [[pm2fb]] - accelerated console driver for Permedia 2 graphics controllers
* [[r128fb]] - accelerated console driver for ATI Rage 128 graphics controllers
* [[voodoofb]] - accelerated console driver for 3Dfx Voodoo 3 graphics controllers
* [[voyagerfb]] - accelerated console driver for Gdium Liberty MIPS-based laptops
* [[xf86-video-ag10e]] - accelerated Xorg driver for Fujitsu [[AG-10e]] graphics boards
* [[xf86-video-crime]] - accelerated Xorg driver for the SGI O2's onboard rendering engine
* [[xf86-video-igs]] - accelerated Xorg driver for IGS CyberPro 2010 and similar chips, tested on [[shark]] only but supporting at least [[netwinder]] should be trivial
* [[xf86-video-pnozz]] - accelerated Xorg driver for the SBus Weitek P9100 found in SPARCbook 3GX laptops

### Drivers I substantially improved
* [[igsfb]] - added mode setting support
* [[machfb]] - added hardware acceleration
* [[pnozz]] - added hardware acceleration and cursor sprite support
* [[crmfb]] - added hardware acceleration and cursor sprite support
* [[tcx]] - added hardware acceleration
* [[tslot]] - adapted from OpenBSD, support for the PCMCIA slots in the SPARCbook 3GX
* [[xf86-video-suncg6]] - added hardware acceleration
* [[xf86-video-suntcx]] - added hardware acceleration

## TODO:
* figure out why anti-aliased font rendering with [[XAA]] in [[Xorg]] 1.6 is ridiculously slow compared to 1.4<br>
Actually there is some progress. The miGlyphs() function uses a scratch pixmap to render characters into which it then renders into the target pixmap. Since off-screen pixmaps in XAA are currently broken and the Xorg people refuse to fix it the scratch pixmap will be in RAM with all XAA drivers resulting in software rendering ( not that XAA knows how to accelerate vram-to-vram composite ops anyway ). I got around that by implementing a private Glyphs() method for the [[crime]] driver which gives a nice speedup but still gets us nowhere near the performance we had with Xorg 1.4. A private Glyphs() implementation for XAA which avoids the scratch pixmap resulted in a small but measurable speedup with the [[sunffb]] driver.
* unbork [[wscons]] on [[sparc]] in the 5.0 branch
* write a [[wsdisplay]] driver for the Permedia2 graphics controller used on Sun's [[PGX32]] graphics board<br>
I have the docs and the hardware, only need some spare time<br>
Done, the [[pm2fb]] driver supports it.
* add acceleration to Xorg's [[sunleo]] driver<br>
I have some docs and hardware but the docs are incomplete - the way WIDs are encoded is missing and I can't find one that by default gives us a 24bit RGB or BGR display.
* make [[radeonfb]] work right on [[i386]]<br>
It works but for some reason X is crashing. This works fine on [[sparc64]] and [[macppc]], it also works with [[i386]] and [[vga]], no idea what's wrong here.
* implement mode setting for [[voodoofb]], [[voyagerfb]], [[r128fb]], [[chipsfb]] etc.
* figure out how to do composite ops on [Fujitsu]('s [[AG-10e]] graphics board
* write an Xorg driver for [IGS]( [[CyberPro]] graphics chips used in [[shark]], [[netwinder]] and other machines<br>
I have the docs, but we will want to use kernel mode setting so maybe I should wait for the relevant GSoC project to get committed.<br>
Done, [[igsfb]] now understands Sun-like mode specifiers in output-device and [[xf86-video-igs]] has been added.
* figure out how to use the [[SX]] rendering engine on Sun [[SparcStation 20]] mainboards<br>
I have a disassembler dump of Sun's own DDX, it shouldn't be all that difficult to do basic blitter operations. The [[SX]] itself could probably accelerate composite ops as well but there's no chance to do that without actual documentation.

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