Date: Tue, 14 Dec 1999 14:08:09 -0500 (EST) From: Andrew Gallatin <gallatin@cs.duke.edu> To: freebsd-current@freebsd.org Cc: tanimura@freebsd.org Subject: ESS1688 newpcm support, soundblaster panics at boot Message-ID: <14422.37057.798245.620736@grasshopper.cs.duke.edu>
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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 @@ {0x01100001, "Avance Asound 110"}, {0x01200001, "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: gallatin@cs.duke.edu Department of Computer Science Phone: (919) 660-6590 To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message
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