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Diffstat (limited to 'src/soc/intel/baytrail')
| -rw-r--r-- | src/soc/intel/baytrail/pcie.c | 15 |
1 files changed, 14 insertions, 1 deletions
diff --git a/src/soc/intel/baytrail/pcie.c b/src/soc/intel/baytrail/pcie.c index ff4891350e..187015801d 100644 --- a/src/soc/intel/baytrail/pcie.c +++ b/src/soc/intel/baytrail/pcie.c @@ -230,6 +230,19 @@ static void byt_pcie_enable(device_t dev) southcluster_enable_dev(dev); } +static unsigned int byt_pciexp_scan_bridge(device_t dev, unsigned int max) +{ + static const struct reg_script wait_for_link_active[] = { + REG_PCI_POLL32(LCTL, (1 << 29) , (1 << 29), 50000), + REG_SCRIPT_END, + }; + + /* wait for Link Active with 50ms timeout */ + reg_script_run_on_dev(dev, wait_for_link_active); + + return do_pci_scan_bridge(dev, max, pciexp_scan_bus); +} + static void pcie_root_set_subsystem(device_t dev, unsigned vid, unsigned did) { uint32_t didvid = ((did & 0xffff) << 16) | (vid & 0xffff); @@ -248,7 +261,7 @@ static struct device_operations device_ops = { .set_resources = pci_dev_set_resources, .enable_resources = pci_bus_enable_resources, .init = byt_pcie_init, - .scan_bus = pciexp_scan_bridge, + .scan_bus = byt_pciexp_scan_bridge, .enable = byt_pcie_enable, .ops_pci = &pcie_root_ops, }; |