diff options
Diffstat (limited to 'drivers/pci/controller/mobiveil/pcie-layerscape-gen4.c')
| -rw-r--r-- | drivers/pci/controller/mobiveil/pcie-layerscape-gen4.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/drivers/pci/controller/mobiveil/pcie-layerscape-gen4.c b/drivers/pci/controller/mobiveil/pcie-layerscape-gen4.c index 43dede26cc7c..d07cddb9c404 100644 --- a/drivers/pci/controller/mobiveil/pcie-layerscape-gen4.c +++ b/drivers/pci/controller/mobiveil/pcie-layerscape-gen4.c @@ -81,12 +81,27 @@ static bool ls_g4_pcie_is_bridge(struct ls_g4_pcie *pcie) return header_type == PCI_HEADER_TYPE_BRIDGE; } +static void workaround_A011451(struct ls_g4_pcie *pcie) +{ + struct mobiveil_pcie *mv_pci = &pcie->pci; + u32 val; + + /* Set ACK latency timeout */ + val = mobiveil_csr_readl(mv_pci, GPEX_ACK_REPLAY_TO); + val &= ~(ACK_LAT_TO_VAL_MASK << ACK_LAT_TO_VAL_SHIFT); + val |= (4 << ACK_LAT_TO_VAL_SHIFT); + mobiveil_csr_writel(mv_pci, val, GPEX_ACK_REPLAY_TO); +} + static int ls_g4_pcie_host_init(struct mobiveil_pcie *pci) { struct ls_g4_pcie *pcie = to_ls_g4_pcie(pci); pcie->rev = mobiveil_csr_readb(pci, PCI_REVISION_ID); + if (pcie->rev == REV_1_0) + workaround_A011451(pcie); + return 0; } |