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Always enable I/O, memory and dma cycles. Some BIOSes don't enable

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them, sometimes they are reset for power state transitions or during
whatever happens while suspended. Also, it is good practice to always
do this.
This commit is contained in:
Warner Losh 2015-01-16 06:19:52 +00:00
parent 53d673996b
commit 966e729842
1 changed files with 3 additions and 3 deletions
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6
sys/dev/pccbb/pccbb_pci.c
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@ -479,10 +479,10 @@ cbb_chipinit(struct cbb_softc *sc)
pci_write_config(sc->dev, PCIR_SECBUS_2, sc->bus.sec, 1);
pci_write_config(sc->dev, PCIR_SUBBUS_2, sc->bus.sub, 1);
/* Enable memory access */
/* Enable DMA, memory access for this card and I/O acces for children */
pci_enable_busmaster(sc->dev);
/* XXX: This should not be necessary, but some chipsets require it */
PCI_MASK_CONFIG(sc->dev, PCIR_COMMAND, | PCIM_CMD_PORTEN, 2);
pci_enable_io(sc->dev, SYS_RES_IOPORT);
pci_enable_io(sc->dev, SYS_RES_MEMORY);
/* disable Legacy IO */
switch (sc->chipset) {