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authorPeter Tyser <ptyser@xes-inc.com>2008-10-29 12:39:26 -0500
committerAndrew Fleming-AFLEMING <afleming@freescale.com>2008-12-19 18:10:45 -0600
commit7a8979591171676417ab36852d8811a8c46accd8 (patch)
treecc8036c73b47cfa4b9be26423ab4d9a6dcae628c /drivers
parentaced78d852d0b009e8aaa1445af8cb40861ee549 (diff)
pci/fsl_pci_init: Enable inbound PCI config cycles
Add fsl_pci_config_unlock() function to enable a PCI/PCIe interface configured in agent/endpoint mode to respond to inbound PCI configuration cycles. Signed-off-by: Peter Tyser <ptyser@xes-inc.com>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/pci/fsl_pci_init.c29
1 files changed, 29 insertions, 0 deletions
diff --git a/drivers/pci/fsl_pci_init.c b/drivers/pci/fsl_pci_init.c
index 1db42fd8d3a..db68f26009e 100644
--- a/drivers/pci/fsl_pci_init.c
+++ b/drivers/pci/fsl_pci_init.c
@@ -37,6 +37,11 @@ DECLARE_GLOBAL_DATA_PTR;
#include <pci.h>
#include <asm/immap_fsl_pci.h>
+/* Freescale-specific PCI config registers */
+#define FSL_PCI_PBFR 0x44
+#define FSL_PCIE_CAP_ID 0x4c
+#define FSL_PCIE_CFG_RDY 0x4b0
+
void pciauto_prescan_setup_bridge(struct pci_controller *hose,
pci_dev_t dev, int sub_bus);
void pciauto_postscan_setup_bridge(struct pci_controller *hose,
@@ -306,6 +311,30 @@ void fsl_pci_init(struct pci_controller *hose)
}
}
+/* Enable inbound PCI config cycles for agent/endpoint interface */
+void fsl_pci_config_unlock(struct pci_controller *hose)
+{
+ pci_dev_t dev = PCI_BDF(hose->first_busno,0,0);
+ u8 agent;
+ u8 pcie_cap;
+ u16 pbfr;
+
+ pci_hose_read_config_byte(hose, dev, PCI_CLASS_PROG, &agent);
+ if (!agent)
+ return;
+
+ pci_hose_read_config_byte(hose, dev, FSL_PCIE_CAP_ID, &pcie_cap);
+ if (pcie_cap != 0x0) {
+ /* PCIe - set CFG_READY bit of Configuration Ready Register */
+ pci_hose_write_config_byte(hose, dev, FSL_PCIE_CFG_RDY, 0x1);
+ } else {
+ /* PCI - clear ACL bit of PBFR */
+ pci_hose_read_config_word(hose, dev, FSL_PCI_PBFR, &pbfr);
+ pbfr &= ~0x20;
+ pci_hose_write_config_word(hose, dev, FSL_PCI_PBFR, pbfr);
+ }
+}
+
#ifdef CONFIG_OF_BOARD_SETUP
#include <libfdt.h>
#include <fdt_support.h>