From: Hou Zhiqiang <Zhiqiang.Hou@xxxxxxx>
Check the Header Type and exit from the host driver initialization if
it is not in host mode.
Signed-off-by: Hou Zhiqiang <Zhiqiang.Hou@xxxxxxx>
---
V10:
- New patch separated from #10 of v9.
.../pci/controller/mobiveil/pcie-mobiveil-host.c | 13 +++++++++++++
1 file changed, 13 insertions(+)
diff --git a/drivers/pci/controller/mobiveil/pcie-mobiveil-host.c b/drivers/pci/controller/mobiveil/pcie-mobiveil-host.c
index 44dd641fede3..db7028788d91 100644
--- a/drivers/pci/controller/mobiveil/pcie-mobiveil-host.c
+++ b/drivers/pci/controller/mobiveil/pcie-mobiveil-host.c
@@ -554,6 +554,16 @@ static int mobiveil_pcie_interrupt_init(struct mobiveil_pcie *pcie)
return mobiveil_pcie_integrated_interrupt_init(pcie);
}
+static bool mobiveil_pcie_is_bridge(struct mobiveil_pcie *pcie)
+{
+ u32 header_type;
+
+ header_type = mobiveil_csr_readb(pcie, PCI_HEADER_TYPE);
+ header_type &= 0x7f;
+
+ return header_type == PCI_HEADER_TYPE_BRIDGE;
+}
+
int mobiveil_pcie_host_probe(struct mobiveil_pcie *pcie)
{
struct mobiveil_root_port *rp = &pcie->rp;
@@ -569,6 +579,9 @@ int mobiveil_pcie_host_probe(struct mobiveil_pcie *pcie)
return ret;
}
+ if (!mobiveil_pcie_is_bridge(pcie))
+ return -ENODEV;
+
/* parse the host bridge base addresses from the device tree file */
ret = pci_parse_request_of_pci_ranges(dev, &bridge->windows,
&bridge->dma_ranges, NULL);
--
2.17.1
