diff options
Diffstat (limited to 'drivers/pci/controller/cadence/pcie-cadence-ep.c')
| -rw-r--r-- | drivers/pci/controller/cadence/pcie-cadence-ep.c | 18 |
1 files changed, 17 insertions, 1 deletions
diff --git a/drivers/pci/controller/cadence/pcie-cadence-ep.c b/drivers/pci/controller/cadence/pcie-cadence-ep.c index 18e32b8ffd5e..b8b655d4047e 100644 --- a/drivers/pci/controller/cadence/pcie-cadence-ep.c +++ b/drivers/pci/controller/cadence/pcie-cadence-ep.c @@ -564,7 +564,8 @@ static int cdns_pcie_ep_start(struct pci_epc *epc) struct cdns_pcie_ep *ep = epc_get_drvdata(epc); struct cdns_pcie *pcie = &ep->pcie; struct device *dev = pcie->dev; - int ret; + int max_epfs = sizeof(epc->function_num_map) * 8; + int ret, value, epf; /* * BIT(0) is hardwired to 1, hence function 0 is always enabled @@ -572,6 +573,21 @@ static int cdns_pcie_ep_start(struct pci_epc *epc) */ cdns_pcie_writel(pcie, CDNS_PCIE_LM_EP_FUNC_CFG, epc->function_num_map); + if (ep->quirk_disable_flr) { + for (epf = 0; epf < max_epfs; epf++) { + if (!(epc->function_num_map & BIT(epf))) + continue; + + value = cdns_pcie_ep_fn_readl(pcie, epf, + CDNS_PCIE_EP_FUNC_DEV_CAP_OFFSET + + PCI_EXP_DEVCAP); + value &= ~PCI_EXP_DEVCAP_FLR; + cdns_pcie_ep_fn_writel(pcie, epf, + CDNS_PCIE_EP_FUNC_DEV_CAP_OFFSET + + PCI_EXP_DEVCAP, value); + } + } + ret = cdns_pcie_start_link(pcie); if (ret) { dev_err(dev, "Failed to start link\n"); |