Re: ESS1688 newpcm support, soundblaster panics at boot

[Doug Rabson]

On Tue, 14 Dec 1999, Andrew Gallatin wrote:

 
 I have an old, wheezing Dell Lattitude LM with an ESS1688 sound chip. 
 (specs at http://support.dell.com/docs/systems/pespmmx/specs.htm)
 
 I have managed to get newpcm to find the 1688 via 'options PNPBIOS'
 and the following patch:

I've added this to my sources. I'll commit it after I get the rest
working.

 
 However, the machine now panics on boot in sbchan_init(), at line 821
 of sb.c with a page fault on access to virtual address 0x14:
  
 I strongly suspect that this is due to the fact that this card has
 only 1 dma channel.  I suspect the panic is caused by
 rman_get_start(sb-drq2) when sb-drq2 is null.
 
 Does newpcm even support simplex operations on soundblaster chips?  I
 ask because I simply could not get simplex operations to work on my
 wss cards, so I suspect that simplex operation is simply not well
 tested.

It is supposed to support simplex but that support has changed recently so
perhaps it broke. I already have a report that the ESS1888 is broken at
the moment and I will be fixing it as soon as I find a spare couple of
hours to tackle it (I have an ESS1888 in my miata).

 
 Can anybody who is more familiar with newpcm please point me in the
 right direction?  

Not sure where to look yet. Something is probably passing a NULL channel.

--
Doug Rabson Mail:  [EMAIL PROTECTED]
Nonlinear Systems Ltd.  Phone: +44 181 442 9037





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ESS1688 newpcm support, soundblaster panics at boot

[Andrew Gallatin]

I have an old, wheezing Dell Lattitude LM with an ESS1688 sound chip. 
(specs at http://support.dell.com/docs/systems/pespmmx/specs.htm)

I have managed to get newpcm to find the 1688 via 'options PNPBIOS'
and the following patch:

Index: sys/dev/sound/isa/sbc.c
===
RCS file: /home/ncvs/src/sys/dev/sound/isa/sbc.c,v
retrieving revision 1.7
diff -u -r1.7 sbc.c
--- sbc.c   1999/12/12 02:30:19 1.7
+++ sbc.c   1999/12/14 04:47:41
@@ -187,6 +187,7 @@
{0x0111, "Avance Asound 110"},
{0x0121, "Avance Logic ALS120"},
 
+   {0x02017316, "ESS ES1688"}, /* ESS1688 */
{0x68187316, "ESS ES1868"}, /* ESS1868 */
{0x69187316, "ESS ES1869"}, /* ESS1869 */
{0xacb0110e, "ESS ES1869 (Compaq OEM)"},



However, the machine now panics on boot in sbchan_init(), at line 821
of sb.c with a page fault on access to virtual address 0x14:
 
   810  static void *
   811  sbchan_init(void *devinfo, snd_dbuf *b, pcm_channel *c, int dir)
   812  {
   813  struct sb_info *sb = devinfo;
   814  struct sb_chinfo *ch = (dir == PCMDIR_PLAY)? sb-pch : sb-rch;
   815  
   816  ch-parent = sb;
   817  ch-channel = c;
   818  ch-buffer = b;
   819  ch-buffer-bufsize = DSP_BUFFSIZE;
   820  if (chn_allocbuf(ch-buffer, sb-parent_dmat) == -1) return NULL;
   821  ch-buffer-chan = (dir == PCMDIR_PLAY)? rman_get_start(sb-drq2)
   822 : rman_get_start(sb-drq1);
   823  return ch;
   824  }

I strongly suspect that this is due to the fact that this card has
only 1 dma channel.  I suspect the panic is caused by
rman_get_start(sb-drq2) when sb-drq2 is null.

Does newpcm even support simplex operations on soundblaster chips?  I
ask because I simply could not get simplex operations to work on my
wss cards, so I suspect that simplex operation is simply not well
tested.

Can anybody who is more familiar with newpcm please point me in the
right direction?  

Thanks,

Drew
--
Andrew Gallatin, Sr Systems Programmer  http://www.cs.duke.edu/~gallatin
Duke University Email: [EMAIL PROTECTED]
Department of Computer Science  Phone: (919) 660-6590




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