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path: root/drivers/pci/fsl_pci_init.c
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Diffstat (limited to 'drivers/pci/fsl_pci_init.c')
-rw-r--r--drivers/pci/fsl_pci_init.c23
1 files changed, 23 insertions, 0 deletions
diff --git a/drivers/pci/fsl_pci_init.c b/drivers/pci/fsl_pci_init.c
index 1e77884..68e45e1 100644
--- a/drivers/pci/fsl_pci_init.c
+++ b/drivers/pci/fsl_pci_init.c
@@ -112,6 +112,29 @@ fsl_pci_init(struct pci_controller *hose)
pci_hose_read_config_word(hose, dev, PCI_LTSSM, &ltssm);
enabled = ltssm >= PCI_LTSSM_L0;
+#ifdef CONFIG_FSL_PCIE_RESET
+ if (ltssm == 1) {
+ int i;
+ debug("....PCIe link error. "
+ "LTSSM=0x%02x.", ltssm);
+ pci->pdb_stat |= 0x08000000; /* assert PCIe reset */
+ temp32 = pci->pdb_stat;
+ udelay(100);
+ debug(" Asserting PCIe reset @%x = %x\n",
+ &pci->pdb_stat, pci->pdb_stat);
+ pci->pdb_stat &= ~0x08000000; /* clear reset */
+ asm("sync;isync");
+ for (i=0; i<100 && ltssm < PCI_LTSSM_L0; i++) {
+ pci_hose_read_config_word(hose, dev, PCI_LTSSM,
+ &ltssm);
+ udelay(1000);
+ debug("....PCIe link error. "
+ "LTSSM=0x%02x.\n", ltssm);
+ }
+ enabled = ltssm >= PCI_LTSSM_L0;
+ }
+#endif
+
if (!enabled) {
debug("....PCIE link error. Skipping scan."
"LTSSM=0x%02x\n", ltssm);