sh: Relax devfn constraints for SH7786 PCIe.
SH7786 PCIe has 1 slot per port, but no specific restriction on function.
Relax the devfn restriction and look to the slot number instead when
configured as a root complex.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
diff --git a/arch/sh/drivers/pci/ops-sh7786.c b/arch/sh/drivers/pci/ops-sh7786.c
index 57134a3..79a5dda 100644
--- a/arch/sh/drivers/pci/ops-sh7786.c
+++ b/arch/sh/drivers/pci/ops-sh7786.c
@@ -25,14 +25,15 @@
struct pci_bus *bus, unsigned int devfn, int where, u32 *data)
{
struct pci_channel *chan = bus->sysdata;
- int dev, func;
+ int dev, func, type;
dev = PCI_SLOT(devfn);
func = PCI_FUNC(devfn);
+ type = !!bus->parent;
if (bus->number > 255 || dev > 31 || func > 7)
return PCIBIOS_FUNC_NOT_SUPPORTED;
- if (devfn)
+ if (bus->parent == NULL && dev)
return PCIBIOS_DEVICE_NOT_FOUND;
/* Clear errors */
@@ -43,13 +44,7 @@
(func << 16) | (where & ~3), SH4A_PCIEPAR);
/* Enable the configuration access */
- if (bus->number) {
- /* Type 1 */
- pci_write_reg(chan, (1 << 31) | (1 << 8), SH4A_PCIEPCTLR);
- } else {
- /* Type 0 */
- pci_write_reg(chan, (1 << 31), SH4A_PCIEPCTLR);
- }
+ pci_write_reg(chan, (1 << 31) | (type << 8), SH4A_PCIEPCTLR);
/* Check for errors */
if (pci_read_reg(chan, SH4A_PCIEERRFR) & 0x10)