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Fix a recording problem that occurs when the EAP chip sends its

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interrupt just BEFORE the dma has finished rather than after.
This commit is contained in:
augustss 1998-05-26 13:28:03 +00:00
parent 538b0cbbdd
commit a10981bdbf
1 changed files with 22 additions and 2 deletions
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24
sys/dev/pci/eap.c
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@ -1,4 +1,4 @@
/* $NetBSD: eap.c,v 1.5 1998/05/06 19:21:45 augustss Exp $ */
/* $NetBSD: eap.c,v 1.6 1998/05/26 13:28:03 augustss Exp $ */
/*
* Copyright (c) 1998 The NetBSD Foundation, Inc.
@ -483,6 +483,26 @@ eap_intr(p)
sic = EREAD4(sc, EAP_SIC);
DPRINTFN(5, ("eap_intr: ICSS=0x%08x, SIC=0x%08x\n", intr, sic));
if (intr & EAP_I_ADC) {
/*
* XXX This is a hack!
* The EAP chip sometimes generates the recording interrupt
* while it is still transferring the data. To make sure
* it has all arrived we busy wait until the count is right.
* The transfer we are waiting for is 8 longwords.
*/
int s, nw, n;
EWRITE4(sc, EAP_MEMPAGE, EAP_ADC_PAGE);
s = EREAD4(sc, EAP_ADC_CSR);
nw = ((s & 0xffff) + 1) / 4; /* # of words in DMA */
n = 0;
while (((EREAD4(sc, EAP_ADC_SIZE) >> 16) + 8) % nw == 0) {
delay(10);
if (++n > 100) {
printf("eapintr: dma fix timeout");
break;
}
}
/* Continue with normal interrupt handling. */
EWRITE4(sc, EAP_SIC, sic & ~EAP_R1_INTR_EN);
EWRITE4(sc, EAP_SIC, sic);
if (sc->sc_rintr)
@ -723,7 +743,7 @@ eap_round_blocksize(addr, blk)
void *addr;
int blk;
{
return (blk & -16); /* keep good alignment */
return (blk & -32); /* keep good alignment */
}
int