Gameport in cmpci (2.4.23)

From: Ville Hallivuori (vph_at_iki.fi)
Date: 11/30/03

  • Next message: Prakash K. Cheemplavam: "Re: Silicon Image 3112A SATA trouble" 
    Date:	Sun, 30 Nov 2003 04:00:06 +0200
To: linux-kernel@vger.kernel.org

    Has anyone managed to get gameport to work in cmpci driver with 2.4.23
    kernel? Upgrade from 2.4.22 broke it for me (using cmpci with CM8738
    integrated on Soyo Dragon mother board).

    With kernels <2.4.23 one would use ns558 to provide game port (cmpci
    only enable joystick support). However in 2.4.23 cmpci provides game
    port support directly. This new support does not appear to be working.

    The major difference between cmpci and ns558 is that cmpci assumes IO
    port 0x200 while ns558 probes quite many ports. In my case the port is
    0x201, not 0x200 as hard-coded in the driver.

    If 201 is valid port for all chips supported by cmpci, the patch below
    should fix the issue:

    --- cmpci.c.old Fri Nov 28 20:26:20 2003
    +++ cmpci.c Sun Nov 30 03:16:22 2003
    @@ -3354,7 +3354,7 @@
     #endif
            s->iosynth = fmio;
            s->iomidi = mpuio;
    - s->gameport.io = 0x200;
    + s->gameport.io = 0x201;
            s->status = 0;
            /* range check */
            if (speakers < 2)

    If the io port is not fixed, perhaps probing mechanism from ns558
    could be copied to cmpci...

    As I do not have specs for CM8738 I can not quess how large the IO port
    should be. With the above fix game port works, but reserved io port is
    8 bytes long (vs 1 byte with ns558). Someone with more familiarity to
    CM87738 might wish to change this... 

    -- 
[Ville Hallivuori][vph@iki.fi][http://www.iki.fi/vph/]
[ID 8E1AD461][FP16=C9 50 E2 DF 48 F6 33 62  5D 87 47 9D 3F 2B 07 5D]
[ID 58543419][FP20=8731 941D 15AB D4A0 88A0  FC8F B55C F4C4 5854 3419]
[ID 8061C24E][FP20=C722 12DA 841E D811 DBFE  2FB3 174C E291 8061 C24E]
 LocalWords:  Ville Hallivuori
-
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/
  • Next message: Prakash K. Cheemplavam: "Re: Silicon Image 3112A SATA trouble"