Commit 7a897959 authored by Peter Tyser's avatar Peter Tyser Committed by Andrew Fleming-AFLEMING
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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: default avatarPeter Tyser <>
parent aced78d8
......@@ -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)
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);
#include <libfdt.h>
#include <fdt_support.h>
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