The branch stable/14 has been updated by jrtc27: URL: https://cgit.FreeBSD.org/src/commit/?id=9ae4c66bff6927dc6fcc855f1aa539a2115b21bd
commit 9ae4c66bff6927dc6fcc855f1aa539a2115b21bd Author: Jessica Clarke <[email protected]> AuthorDate: 2024-06-02 20:42:18 +0000 Commit: Jessica Clarke <[email protected]> CommitDate: 2024-09-07 01:47:00 +0000 fu740_pci_dw: Fix PERST delay and keep asserted for rest of reset sequence DELAY takes microseconds not milliseconds, so 100 was too low. Moreover, when enabling hw.pci.clear_pcib, PCI emeration would still stop at one of the first bridges, but by asserting PERST for the rest of the reset sequence that appears to be reliably addressed. Fixes: 896e217a0eae ("fu740_pci_dw: Add SiFive FU740 PCIe controller driver") (cherry picked from commit 28aaa58fa64ecb89d47f0a8396954ad8ca82d8ef) --- sys/riscv/sifive/fu740_pci_dw.c | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-) diff --git a/sys/riscv/sifive/fu740_pci_dw.c b/sys/riscv/sifive/fu740_pci_dw.c index fe741f4bb6e6..eff23a294985 100644 --- a/sys/riscv/sifive/fu740_pci_dw.c +++ b/sys/riscv/sifive/fu740_pci_dw.c @@ -216,12 +216,6 @@ fupci_phy_init(struct fupci_softc *sc) return (error); } - /* Hold PERST for 100ms as per the PCIe spec */ - DELAY(100); - - /* Deassert PERST_N */ - FUDW_MGMT_WRITE(sc, FUDW_MGMT_PERST_N, 1); - /* Deassert core power-on reset (active low) */ error = gpio_pin_set_active(sc->porst_pin, true); if (error != 0) { @@ -281,6 +275,12 @@ fupci_phy_init(struct fupci_softc *sc) /* Put the controller in Root Complex mode */ FUDW_MGMT_WRITE(sc, FUDW_MGMT_DEVICE_TYPE, FUDW_MGMT_DEVICE_TYPE_RC); + /* Hold PERST for 100ms as per the PCIe spec */ + DELAY(100000); + + /* Deassert PERST_N */ + FUDW_MGMT_WRITE(sc, FUDW_MGMT_PERST_N, 1); + return (0); }
