proper ioport space allocation

Bob McElrath (mcelrath@draal.physics.wisc.edu)
Thu, 17 Dec 1998 10:22:18 -0600 (EST)

I've been playing with the pas2 (sound) module on my Alpha (because it works
on Intel, but not Alpha), and have discovered that this module never
allocates any portspace. (i.e. cat /proc/ioports shows no mention of the
PAS16 driver). Now in looking through the developer's kit and such I have
discovered that this card uses an absolute boatload of portspace. It starts
at 0x388 and uses harmonics (of 0x400) above that, as well as one other
random port. (List below)

Now, is this normal for a card? Do all hardware devices use higher
harmonics like this? I've inserted code to check and allocate all the
portspace this card uses, but I'm not sure this is correct. Here's a
snippet of the monster: (from pas2_card.c, roundabouts line 300 in
detect_pas_hw(...))

/* PAS16 uses a BOATLOAD of IO space... */
if (check_region(hw_config->io_base, 4) || /* 0x388 */
check_region(hw_config->io_base + 0x400, 4) || /* 0x788 */
check_region(hw_config->io_base + 0x800, 4) || /* 0xb88 */
check_region(hw_config->io_base + 0xc00, 4) || /* 0xf88 */
check_region(hw_config->io_base + 0x1000, 4) || /* 0x1388 */
check_region(hw_config->io_base + 0x1400, 4) || /* 0x1788 */
check_region(hw_config->io_base + 0x1800, 4) || /* 0x1b88 */
check_region(hw_config->io_base + 0x2000, 4) || /* 0x2388 */
check_region(hw_config->io_base + 0x4300, 4) || /* 0x4388 */
check_region(hw_config->io_base + 0x7400, 4) || /* 0x7788 */
check_region(hw_config->io_base + 0x7c00, 4) || /* 0x7f88 */
check_region(hw_config->io_base + 0x8000, 4) || /* 0x8388 */
check_region(hw_config->io_base + 0xbc00, 4) || /* 0xbf88 */
check_region(hw_config->io_base + 0xe000, 4) || /* 0xe388 */
check_region(hw_config->io_base + 0xe800, 4) || /* 0xeb88 */
check_region(hw_config->io_base + 0xec00, 4) || /* 0xef88 */
check_region(hw_config->io_base + 0xf000, 4) || /* 0xf388 */
check_region(hw_config->io_base + 0xf400, 4) || /* 0xf788 */
check_region(hw_config->io_base + 0xf800, 4) || /* 0xfb88 */
check_region(hw_config->io_base + 0xfc00, 4) || /* 0xff88 */
check_region(MASTER_ADDRESS, 1) /* 0x9A01 -- used to change io_base */
)

And of course, allocating all this makes /proc/ioports UGLY:

0060-006f : keyboard
0070-007f : timer
0220-022f : soundblaster
02f8-02ff : serial(auto)
0388-038b : Pro AudioSpectrum 16
03c0-03df : vga+
03f8-03ff : serial(auto)
0788-078b : Pro AudioSpectrum 16
0b88-0b8b : Pro AudioSpectrum 16
0f88-0f8b : Pro AudioSpectrum 16
1388-138b : Pro AudioSpectrum 16
1788-178b : Pro AudioSpectrum 16
1b88-1b8b : Pro AudioSpectrum 16
2388-238b : Pro AudioSpectrum 16
4688-468b : Pro AudioSpectrum 16
7788-778b : Pro AudioSpectrum 16
7f88-7f8b : Pro AudioSpectrum 16
8000-8003 : BusLogic BT-958
8388-838b : Pro AudioSpectrum 16
8800-881f : 3c905B Cyclone 100baseTx
9a01-9a01 : Pro AudioSpectrum 16
bf88-bf8b : Pro AudioSpectrum 16
e388-e38b : Pro AudioSpectrum 16
eb88-eb8b : Pro AudioSpectrum 16
ef88-ef8b : Pro AudioSpectrum 16
f388-f38b : Pro AudioSpectrum 16
f788-f78b : Pro AudioSpectrum 16
fb88-fb8b : Pro AudioSpectrum 16
ff88-ff8b : Pro AudioSpectrum 16

suggestions?

-- Bob

P.S. I've fixed a few bugs in unloading the driver...patch soon for those of
you still using this card.

Bob McElrath (mcelrath@draal.physics.wisc.edu) Univ. of Wisconsin at Madison

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