@@ -444,6 +444,21 @@ void fsl_pci_init(struct pci_controller *hose, struct fsl_pci_info *pci_info)
ltssm = (in_be32(&pci->pex_csr0)
& PEX_CSR0_LTSSM_MASK) >> PEX_CSR0_LTSSM_SHIFT;
enabled = (ltssm == 0x11) ? 1 : 0;
+#ifdef CONFIG_FSL_PCIE_RESET
+ int i;
+ /* assert PCIe reset */
+ setbits_be32(&pci->pdb_stat, 0x08000000);
+ (void) in_be32(&pci->pdb_stat);
+ udelay(1000);
+ /* clear PCIe reset */
+ clrbits_be32(&pci->pdb_stat, 0x08000000);
+ asm("sync;isync");
+ for (i = 0; i < 100 && ltssm < PCI_LTSSM_L0; i++) {
+ pci_hose_read_config_word(hose, dev, PCI_LTSSM,
+ <ssm);
+ udelay(1000);
+ }
+#endif
} else {
/* pci_hose_read_config_word(hose, dev, PCI_LTSSM, <ssm); */
/* enabled = ltssm >= PCI_LTSSM_L0; */
@@ -558,6 +558,7 @@ unsigned long get_board_ddr_clk(void);
#define CONFIG_PCIE2 /* PCIE controler 2 */
#define CONFIG_PCIE3 /* PCIE controler 3 */
#define CONFIG_PCIE4 /* PCIE controler 4 */
+#define CONFIG_FSL_PCIE_RESET
#define CONFIG_FSL_PCI_INIT /* Use common FSL init code */
#define CONFIG_SYS_PCI_64BIT /* enable 64-bit PCI resources */
/* controller 1, direct to uli, tgtid 3, Base address 20000 */
T2080QDS PEX1/Slot#1 will down-train from x4 to x2, with SRDS_PRTCL_S1 = 0x66 and SRDS_PRTCL_S2 = 0x15. Soft reset PCIe can fix this issue. Signed-off-by: Zhao Qiang <B45475@freescale.com> --- changes for v2 - modify the commit message changes for v3 - use CONFIG_FSL_PCIE_RESET instead of CONFIG_FSL_PCIE_T2080QDS_RESET drivers/pci/fsl_pci_init.c | 15 +++++++++++++++ include/configs/T208xQDS.h | 1 + 2 files changed, 16 insertions(+)