Write zeros into the base/bounds register bars. We need to do this

because NEWBUS (and I think some versions of Windows sometimes) writes
0xffffffff to these registers to disable them.  When they are
"disabled" like this, writing memory ranges to the pcic registers are
ignored and you will get "card (null) (null)" when you insert a call
otherwise.

1 files changed, 16 insertions, 0 deletions

diff --git a/sys/pccard/pcic_pci.c b/sys/pccard/pcic_pci.c
index 666d014..0660416 100644
--- a/sys/pccard/pcic_pci.c
+++ b/sys/pccard/pcic_pci.c
@@ -314,6 +314,22 @@ pcic_pci_cardbus_init(device_t dev)
 
 	/* Turn off legacy address */
 	pci_write_config(dev, CB_PCI_LEGACY16_IOADDR, 0, 2);
+
+	/* 
+	 * Write zeros into the remaining BARs.  This seems to turn off
+	 * the pci configuration of these things and make the cardbus
+	 * bridge use the values for memory programmed into the pcic
+	 * registers.
+	 */
+	pci_write_config(dev, CB_PCI_MEMBASE0, 0, 4);
+	pci_write_config(dev, CB_PCI_MEMLIMIT0, 0, 4);
+	pci_write_config(dev, CB_PCI_MEMBASE1, 0, 4);
+	pci_write_config(dev, CB_PCI_MEMLIMIT1, 0, 4);
+	pci_write_config(dev, CB_PCI_IOBASE0, 0, 4);
+	pci_write_config(dev, CB_PCI_IOLIMIT0, 0, 4);
+	pci_write_config(dev, CB_PCI_IOBASE1, 0, 4);
+	pci_write_config(dev, CB_PCI_IOLIMIT1, 0, 4);
+
 	return;
 }