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Force PCI_COMMAND_MASTER_ENABLE if DMA has been setup properly. The BIOS is

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supposed to do it but who knows ...
This commit is contained in:
bouyer 1998-11-12 15:05:29 +00:00
parent a16b0cc7db
commit 56107b8e10
1 changed files with 7 additions and 1 deletions
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8
sys/dev/pci/pciide.c
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@ -1,4 +1,4 @@
/* $NetBSD: pciide.c,v 1.15 1998/11/11 19:38:27 bouyer Exp $ */
/* $NetBSD: pciide.c,v 1.16 1998/11/12 15:05:29 bouyer Exp $ */
/*
* Copyright (c) 1996, 1998 Christopher G. Demetriou. All rights reserved.
@ -550,6 +550,12 @@ pciide_attach(parent, self, aux)
}
sc->sc_pp->setup_chip(sc, pc, tag);
/* Enable PCI bus-master DMA */
if (sc->sc_dma_ok) {
csr = pci_conf_read(pc, tag, PCI_COMMAND_STATUS_REG);
csr |= PCI_COMMAND_MASTER_ENABLE;
pci_conf_write(pc, tag, PCI_COMMAND_STATUS_REG, csr);
}
WDCDEBUG_PRINT(("pciide: command/status register=%x\n",
pci_conf_read(pc, tag, PCI_COMMAND_STATUS_REG)), DEBUG_PROBE);
}