diff options
| -rw-r--r-- | sys/pci/meteor.c | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/sys/pci/meteor.c b/sys/pci/meteor.c index 71f708f..1f7c5f1 100644 --- a/sys/pci/meteor.c +++ b/sys/pci/meteor.c @@ -1029,6 +1029,37 @@ met_attach(pcici_t tag, int unit) return ; } + /* + * Check for Meteor/PPB (PCI-PCI Bridge) + * Reprogram IBM Bridge if detected. + * New Meteor cards have an IBM PCI-PCI bridge, creating a secondary + * PCI bus. The SAA chip is connected to this secondary bus. + */ + + /* If we are not on PCI Bus 0, check for the Bridge */ + if ( pci_get_bus_from_tag( tag ) != 0) { + pcici_t bridge_tag; + + /* get tag of parent bridge */ + bridge_tag = pci_get_parent_from_tag( tag ); + + /* Look for IBM 82351, 82352 or 82353 */ + if (pci_conf_read(bridge_tag, PCI_ID_REG) == 0x00221014) { + + if ( bootverbose) + printf("meteor%d: PPB device detected, reprogramming IBM bridge.\n", unit); + + /* disable SERR */ + pci_cfgwrite(bridge_tag, 0x05, 0x00, 1); + /* set LATENCY */ + pci_cfgwrite(bridge_tag, 0x0d, 0x20, 1); + /* write posting enable, prefetch enabled --> GRAB direction */ + pci_cfgwrite(bridge_tag, 0x42, 0x14, 1); + /* set PRTR Primary retry timer register */ + pci_cfgwrite(bridge_tag, 0x4c, 0x10, 1); + } + } + mtr = &meteor[unit]; mtr->tag = tag; pci_map_mem(tag, PCI_MAP_REG_START, (vm_offset_t *)&mtr->base, |
