diff options
Diffstat (limited to 'arch/powerpc/sysdev/fsl_pci.c')
| -rw-r--r-- | arch/powerpc/sysdev/fsl_pci.c | 29 |
1 files changed, 26 insertions, 3 deletions
diff --git a/arch/powerpc/sysdev/fsl_pci.c b/arch/powerpc/sysdev/fsl_pci.c index 682084dba19b..3271177239b9 100644 --- a/arch/powerpc/sysdev/fsl_pci.c +++ b/arch/powerpc/sysdev/fsl_pci.c @@ -54,13 +54,35 @@ static void quirk_fsl_pcie_header(struct pci_dev *dev) return; } -static int __init fsl_pcie_check_link(struct pci_controller *hose) +static int __init fsl_pcie_check_link(struct pci_controller *hose, + struct resource *rsrc) { + struct ccsr_pci __iomem *pci = NULL; u32 val; + /* for PCIe IP rev 3.0 or greater use CSR0 for link state */ + if (rsrc) { + pr_debug("PCI memory map start 0x%016llx, size 0x%016llx\n", + (u64)rsrc->start, (u64)rsrc->end - (u64)rsrc->start + 1); + pci = ioremap(rsrc->start, rsrc->end - rsrc->start + 1); + if (!pci) { + dev_err(hose->parent, "Unable to map PCIe registers\n"); + return -ENOMEM; + } + if (in_be32(&pci->block_rev1) >= PCIE_IP_REV_3_0) { + val = (in_be32(&pci->pex_csr0) & PEX_CSR0_LTSSM_MASK) + >> PEX_CSR0_LTSSM_SHIFT; + if (val != PEX_CSR0_LTSSM_L0) + return 1; + iounmap(pci); + return 0; + } + iounmap(pci); + } early_read_config_dword(hose, 0, 0, PCIE_LTSSM, &val); if (val < PCIE_LTSSM_L0) return 1; + return 0; } @@ -483,7 +505,7 @@ int __init fsl_add_bridge(struct platform_device *pdev, int is_primary) if (early_find_capability(hose, 0, 0, PCI_CAP_ID_EXP)) { hose->indirect_type |= PPC_INDIRECT_TYPE_EXT_REG | PPC_INDIRECT_TYPE_SURPRESS_PRIMARY_BUS; - if (fsl_pcie_check_link(hose)) + if (fsl_pcie_check_link(hose, &rsrc)) hose->indirect_type |= PPC_INDIRECT_TYPE_NO_PCIE_LINK; } @@ -685,7 +707,7 @@ static int __init mpc83xx_pcie_setup(struct pci_controller *hose, out_le32(pcie->cfg_type0 + PEX_OUTWIN0_TAH, 0); out_le32(pcie->cfg_type0 + PEX_OUTWIN0_TAL, 0); - if (fsl_pcie_check_link(hose)) + if (fsl_pcie_check_link(hose, NULL)) hose->indirect_type |= PPC_INDIRECT_TYPE_NO_PCIE_LINK; return 0; @@ -836,6 +858,7 @@ static const struct of_device_id pci_ids[] = { { .compatible = "fsl,qoriq-pcie-v2.2", }, { .compatible = "fsl,qoriq-pcie-v2.3", }, { .compatible = "fsl,qoriq-pcie-v2.4", }, + { .compatible = "fsl,qoriq-pcie-v3.0", }, /* * The following entries are for compatibility with older device |