[POWERPC] FSL: Add support for PCI-X controllers

Some set of 85xx platforms have PCI-X controllers.  The old arch/ppc
code setup these controllers and we haven't moved it over to arch/powerpc.

We use the PCI-X Capabilties to know if we are in PCI-X mode instead
of the Global Utilities PORDEVSR.

Signed-off-by: Kumar Gala <galak@kernel.crashing.org>

1 files changed, 12 insertions, 1 deletions

diff --git a/arch/powerpc/sysdev/fsl_pci.c b/arch/powerpc/sysdev/fsl_pci.c
index f88a9aecdf16..13aaefc1af5b 100644
--- a/arch/powerpc/sysdev/fsl_pci.c
+++ b/arch/powerpc/sysdev/fsl_pci.c
@@ -89,11 +89,22 @@ void __init setup_pci_atmu(struct pci_controller *hose, struct resource *rsrc)
 void __init setup_pci_cmd(struct pci_controller *hose)
 {
         u16 cmd;
+        int cap_x;
+
         early_read_config_word(hose, 0, 0, PCI_COMMAND, &cmd);
         cmd |= PCI_COMMAND_SERR | PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY
                 | PCI_COMMAND_IO;
         early_write_config_word(hose, 0, 0, PCI_COMMAND, cmd);
-        early_write_config_byte(hose, 0, 0, PCI_LATENCY_TIMER, 0x80);
+
+        cap_x = early_find_capability(hose, 0, 0, PCI_CAP_ID_PCIX);
+        if (cap_x) {
+                int pci_x_cmd = cap_x + PCI_X_CMD;
+                cmd = PCI_X_CMD_MAX_SPLIT | PCI_X_CMD_MAX_READ
+                        | PCI_X_CMD_ERO | PCI_X_CMD_DPERR_E;
+                early_write_config_word(hose, 0, 0, pci_x_cmd, cmd);
+        } else {
+                early_write_config_byte(hose, 0, 0, PCI_LATENCY_TIMER, 0x80);
+        }
 }
 
 static void __devinit quirk_fsl_pcie_transparent(struct pci_dev *dev)