On the MPC85xx boards that have PCIe enable the PCIe errata fix. (MPC8544DS, MPC8548CDS, MPC8568MDS).
Signed-off-by: Kumar Gala galak@kernel.crashing.org ---
in my git tree.
drivers/pci/fsl_pci_init.c | 23 +++++++++++++++++++++++ include/asm-ppc/immap_fsl_pci.h | 4 +++- include/configs/MPC8544DS.h | 1 + include/configs/MPC8548CDS.h | 1 + include/configs/MPC8568MDS.h | 1 + 5 files changed, 29 insertions(+), 1 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, <ssm); 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, + <ssm); + 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); diff --git a/include/asm-ppc/immap_fsl_pci.h b/include/asm-ppc/immap_fsl_pci.h index bd732b6..6715064 100644 --- a/include/asm-ppc/immap_fsl_pci.h +++ b/include/asm-ppc/immap_fsl_pci.h @@ -144,7 +144,9 @@ typedef struct ccsr_pci { u32 perr_cap1; /* 0xe2c - PCIE Error Capture Register 1 */ u32 perr_cap2; /* 0xe30 - PCIE Error Capture Register 2 */ u32 perr_cap3; /* 0xe34 - PCIE Error Capture Register 3 */ - char res23[456]; /* (- #x1000 #xe38) 456 */ + char res23[200]; + u32 pdb_stat; /* 0xf00 - PCIE Debug Status */ + char res24[252]; } ccsr_fsl_pci_t;
#endif /*__IMMAP_fsl_pci__*/ diff --git a/include/configs/MPC8544DS.h b/include/configs/MPC8544DS.h index b8cd50b..545a76c 100644 --- a/include/configs/MPC8544DS.h +++ b/include/configs/MPC8544DS.h @@ -40,6 +40,7 @@ #define CONFIG_PCIE2 1 /* PCIE controler 2 (slot 2) */ #define CONFIG_PCIE3 1 /* PCIE controler 3 (ULI bridge) */ #define CONFIG_FSL_PCI_INIT 1 /* Use common FSL init code */ +#define CONFIG_FSL_PCIE_RESET 1 /* need PCIe reset errata */
#define CONFIG_TSEC_ENET /* tsec ethernet support */ #define CONFIG_ENV_OVERWRITE diff --git a/include/configs/MPC8548CDS.h b/include/configs/MPC8548CDS.h index 95affa5..3f382e5 100644 --- a/include/configs/MPC8548CDS.h +++ b/include/configs/MPC8548CDS.h @@ -42,6 +42,7 @@ #undef CONFIG_RIO #undef CONFIG_PCI2 #define CONFIG_FSL_PCI_INIT 1 /* Use common FSL init code */ +#define CONFIG_FSL_PCIE_RESET 1 /* need PCIe reset errata */
#define CONFIG_TSEC_ENET /* tsec ethernet support */ #define CONFIG_ENV_OVERWRITE diff --git a/include/configs/MPC8568MDS.h b/include/configs/MPC8568MDS.h index 3822c1b..59f490e 100644 --- a/include/configs/MPC8568MDS.h +++ b/include/configs/MPC8568MDS.h @@ -37,6 +37,7 @@ #define CONFIG_PCI1 1 /* PCI controller */ #define CONFIG_PCIE1 1 /* PCIE controller */ #define CONFIG_FSL_PCI_INIT 1 /* use common fsl pci init code */ +#define CONFIG_FSL_PCIE_RESET 1 /* need PCIe reset errata */ #define CONFIG_TSEC_ENET /* tsec ethernet support */ #define CONFIG_QE /* Enable QE */ #define CONFIG_ENV_OVERWRITE