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authorKumar Gala <galak@kernel.crashing.org>2007-12-07 12:17:34 -0600
committerKumar Gala <galak@kernel.crashing.org>2007-12-11 22:34:20 -0600
commit8ff3de61fc5f9b3b21647bce081a3b7f710f0d4d (patch)
tree78409af74c00710d92724acc7f725b8726833d26
parent82ac8c97145a4c3bf8b3dbfad00fa96e920f9b9c (diff)
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Handle MPC85xx PCIe reset errata (PCI-Ex 38)
On the MPC85xx boards that have PCIe enable the PCIe errata fix. (MPC8544DS, MPC8548CDS, MPC8568MDS). Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
-rw-r--r--drivers/pci/fsl_pci_init.c23
-rw-r--r--include/asm-ppc/immap_fsl_pci.h4
-rw-r--r--include/configs/MPC8544DS.h1
-rw-r--r--include/configs/MPC8548CDS.h1
-rw-r--r--include/configs/MPC8568MDS.h1
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, &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);
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