i386/74191: Notebook PC2001 Compliant AC97 audio works for only first 15 seconds

[Pyun YongHyeon]

On Wed, Oct 05, 2005 at 05:00:27PM +0000, Tilman Linneweh wrote:
 > Synopsis: Notebook PC2001 Compliant AC97 audio works for only first 15 seconds
 > 
 > Responsible-Changed-From-To: freebsd-i386->freebsd-multimedia
 > Responsible-Changed-By: arved
 > Responsible-Changed-When: Wed Oct 5 16:59:57 GMT 2005
 > Responsible-Changed-Why: 
 > over to multimedia group
 > 
 > http://www.freebsd.org/cgi/query-pr.cgi?pr=74191

I can't sure what caused this but it seems that there is a bug in
interrupt handler.

In stock t4dwave(4), we have the following code in tr_intr().
    725         intsrc = tr_rd(tr, TR_REG_MISCINT, 4);
    726         if (intsrc & TR_INT_ADDR) {
    727                 chnum = 0;
    728                 while (chnum < 64) {
                                       ^^^
    729                         mask = 0x00000001;

I think it would be 32 for M5451 as the hardware only supports 32
channels. The correct one should be selected by checking pci_get_devid(). 
Ariff, what's your opinion?
-- 
Regards,
Pyun YongHyeon