diff options
Diffstat (limited to 'arch/powerpc/platforms/86xx')
| -rw-r--r-- | arch/powerpc/platforms/86xx/pci.c | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/arch/powerpc/platforms/86xx/pci.c b/arch/powerpc/platforms/86xx/pci.c index 0db51e8ab5d..3825e1ac531 100644 --- a/arch/powerpc/platforms/86xx/pci.c +++ b/arch/powerpc/platforms/86xx/pci.c @@ -122,7 +122,6 @@ static void __init mpc86xx_setup_pcie(struct pci_controller *hose, u32 pcie_offset, u32 pcie_size) { u16 cmd; - unsigned int temps; DBG("PCIE host controller register offset 0x%08x, size 0x%08x.\n", pcie_offset, pcie_size); @@ -135,6 +134,9 @@ mpc86xx_setup_pcie(struct pci_controller *hose, u32 pcie_offset, u32 pcie_size) early_write_config_byte(hose, 0, 0, PCI_LATENCY_TIMER, 0x80); } +#define PCIE_LTSSM 0x404 /* PCIe Link Training and Status */ +#define PCIE_LTSSM_L0 0x16 /* L0 state */ + int __init mpc86xx_add_bridge(struct device_node *dev) { int len; @@ -143,6 +145,7 @@ int __init mpc86xx_add_bridge(struct device_node *dev) const int *bus_range; int has_address = 0; int primary = 0; + u16 val; DBG("Adding PCIE host bridge %s\n", dev->full_name); @@ -159,12 +162,18 @@ int __init mpc86xx_add_bridge(struct device_node *dev) if (!hose) return -ENOMEM; hose->arch_data = dev; + hose->indirect_type = PPC_INDIRECT_TYPE_EXT_REG; hose->first_busno = bus_range ? bus_range[0] : 0x0; hose->last_busno = bus_range ? bus_range[1] : 0xff; setup_indirect_pci(hose, rsrc.start, rsrc.start + 0x4); + /* Probe the hose link training status */ + early_read_config_word(hose, 0, 0, PCIE_LTSSM, &val); + if (val < PCIE_LTSSM_L0) + return -ENXIO; + /* Setup the PCIE host controller. */ mpc86xx_setup_pcie(hose, rsrc.start, rsrc.end - rsrc.start + 1); |