diff options
| author | Kevin Hsieh <kevin.hsieh@intel.com> | 2014-11-26 03:08:18 +0800 |
|---|---|---|
| committer | Stefan Reinauer <stefan.reinauer@coreboot.org> | 2015-04-10 20:04:49 +0200 |
| commit | d946f5e61d0c8966bec57f7d3961e41555b5299a (patch) | |
| tree | 3818b315a3e2ab365789bf2047492d9f5badb73b | |
| parent | 47f112cf80b108066ea7693501665371b8fd41fd (diff) | |
Baytrail: Prior to PCI scan, wait for LCTL to be active in 50 ms
Using REG_PCI_POLL32 to check if the LINK is active with 50ms timeout.
BRANCH=none
BUG=chromium:431169
TEST=Test on Enguarde, compile ok and boot OS
Change-Id: If98ab4e31d17ec4e62d68b93edcec6d9aee87367
Signed-off-by: Stefan Reinauer <reinauer@chromium.org>
Original-Commit-Id: cf692ae9aebb43ab46cb07d36b62b300b16be1dc
Original-Change-Id: I490e6ffa40979628edf52a7444808b6d25a6e83d
Original-Signed-off-by: Kevin Hsieh <kevin.hsieh@intel.com>
Original-Reviewed-on: https://chromium-review.googlesource.com/231777
Original-Reviewed-by: Shawn Nematbakhsh <shawnn@chromium.org>
Reviewed-on: http://review.coreboot.org/9478
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
| -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, }; |