summaryrefslogtreecommitdiffstats
path: root/drkaiser.c
diff options
context:
space:
mode:
Diffstat (limited to 'drkaiser.c')
-rw-r--r--drkaiser.c14
1 files changed, 7 insertions, 7 deletions
diff --git a/drkaiser.c b/drkaiser.c
index ee3904e..09d8daf 100644
--- a/drkaiser.c
+++ b/drkaiser.c
@@ -26,6 +26,9 @@
#define PCI_MAGIC_DRKAISER_ADDR 0x50
#define PCI_MAGIC_DRKAISER_VALUE 0xa971
+/* Mask to restrict flash accesses to the 128kB memory window. */
+#define DRKAISER_MEMMAP_MASK ((1 << 17) - 1)
+
const struct pcidev_status drkaiser_pcidev[] = {
{0x1803, 0x5057, OK, "Dr. Kaiser", "PC-Waechter (Actel FPGA)"},
{},
@@ -39,16 +42,13 @@ int drkaiser_init(void)
get_io_perms();
- pcidev_init(PCI_VENDOR_ID_DRKAISER, PCI_BASE_ADDRESS_2,
- drkaiser_pcidev);
+ addr = pcidev_init(PCI_VENDOR_ID_DRKAISER, PCI_BASE_ADDRESS_2,
+ drkaiser_pcidev);
/* Write magic register to enable flash write. */
pci_write_word(pcidev_dev, PCI_MAGIC_DRKAISER_ADDR,
PCI_MAGIC_DRKAISER_VALUE);
- /* TODO: Mask lower bits? How many? 3? 7? */
- addr = pci_read_long(pcidev_dev, PCI_BASE_ADDRESS_2) & ~0x03;
-
/* Map 128KB flash memory window. */
drkaiser_bar = physmap("Dr. Kaiser PC-Waechter flash memory",
addr, 128 * 1024);
@@ -69,10 +69,10 @@ int drkaiser_shutdown(void)
void drkaiser_chip_writeb(uint8_t val, chipaddr addr)
{
- mmio_writeb(val, drkaiser_bar + addr);
+ mmio_writeb(val, drkaiser_bar + (addr & DRKAISER_MEMMAP_MASK));
}
uint8_t drkaiser_chip_readb(const chipaddr addr)
{
- return mmio_readb(drkaiser_bar + addr);
+ return mmio_readb(drkaiser_bar + (addr & DRKAISER_MEMMAP_MASK));
}
OpenPOWER on IntegriCloud