[PATCH 7/8] pci: pci_mvebu: Setup PCI controller to Root Complex mode

Pali Rohár
2021-10-22T14:24:08Z

Root Complex should be the default mode, let's set it explicitly.

Signed-off-by: Pali Rohár <pali@kernel.org>
Reviewed-by: Marek Behún <marek.behun@nic.cz>
---
drivers/pci/pci_mvebu.c | 6 ++++++
1 file changed, 6 insertions(+)

diff --git a/drivers/pci/pci_mvebu.c b/drivers/pci/pci_mvebu.c
index e43fa12d3819..b0c673d8c472 100644
--- a/drivers/pci/pci_mvebu.c
+++ b/drivers/pci/pci_mvebu.c
@@ -62,6 +62,7 @@ DECLARE_GLOBAL_DATA_PTR;
#define PCIE_MASK_ENABLE_INTS (0xf << 24)
#define PCIE_CTRL_OFF 0x1a00
#define PCIE_CTRL_X1_MODE BIT(0)
+#define PCIE_CTRL_RC_MODE BIT(1)
#define PCIE_STAT_OFF 0x1a04
#define PCIE_STAT_BUS (0xff << 8)
#define PCIE_STAT_DEV (0x1f << 16)
@@ -373,6 +374,11 @@ static int mvebu_pcie_probe(struct udevice *dev)
struct pci_controller *hose = dev_get_uclass_priv(ctlr);
u32 reg;

+ /* Setup PCIe controller to Root Complex mode */
+ reg = readl(pcie->base + PCIE_CTRL_OFF);
+ reg |= PCIE_CTRL_RC_MODE;
+ writel(reg, pcie->base + PCIE_CTRL_OFF);
+
/*
* Change Class Code of PCI Bridge device to PCI Bridge (0x600400)
* because default value is Memory controller (0x508000) which
--
2.20.1