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Stop DMA before resetting

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This commit is contained in:
pk 1995-11-03 16:34:12 +00:00
parent 3095b6514c
commit bbdb422873
1 changed files with 3 additions and 2 deletions
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5
sys/arch/sparc/dev/dma.c
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@ -1,4 +1,4 @@
/* $NetBSD: dma.c,v 1.11 1995/10/24 16:26:54 pk Exp $ */
/* $NetBSD: dma.c,v 1.12 1995/11/03 16:34:12 pk Exp $ */
/*
* Copyright (c) 1994 Peter Galbavy. All rights reserved.
@ -204,6 +204,7 @@ void
dma_reset(sc)
struct dma_softc *sc;
{
DMACSR(sc) &= ~D_EN_DMA; /* Stop DMA */
DMAWAIT1(sc); /* let things drain */
DMACSR(sc) |= D_RESET; /* reset DMA */
DELAY(200); /* what should this be ? */
@ -304,7 +305,7 @@ dmaintr(sc)
volatile caddr_t esp = sc->sc_esp->sc_reg;
int trans = 0, resid = 0;
ESP_DMA(("%s: intr\n", sc->sc_dev.dv_xname));
ESP_DMA(("%s: intr: <csr %x>", sc->sc_dev.dv_xname, DMACSR(sc)));
if (DMACSR(sc) & D_ERR_PEND) {
DMACSR(sc) &= ~D_EN_DMA; /* Stop DMA */