[U-Boot] [PATCH] dm: pci: change bus number register setting compliant with Linux

[Zhiqiang Hou]

From: Minghuan Lian <Minghuan.Lian at nxp.com>

This patch is to change uboot PCI bus assignement compliant with Linux.
It means each PCIe controller's bus number is 0, not the current maximum
PCI bus number, when start to scan this controller.

Signed-off-by: Minghuan Lian <Minghuan.Lian at nxp.com>
Signed-off-by: Hou Zhiqiang <Zhiqiang.Hou at nxp.com>
---
 drivers/pci/pci_auto.c        | 6 +++---
 drivers/pci/pcie_dw_mvebu.c   | 1 +
 drivers/pci/pcie_layerscape.c | 2 +-
 drivers/pci/pcie_xilinx.c     | 2 ++
 4 files changed, 7 insertions(+), 4 deletions(-)

diff --git a/drivers/pci/pci_auto.c b/drivers/pci/pci_auto.c
index ee9a854bda..87b648cf19 100644
--- a/drivers/pci/pci_auto.c
+++ b/drivers/pci/pci_auto.c
@@ -181,8 +181,8 @@ void dm_pciauto_prescan_setup_bridge(struct udevice *dev, int sub_bus)
 
 	/* Configure bus number registers */
 	dm_pci_write_config8(dev, PCI_PRIMARY_BUS,
-			     PCI_BUS(dm_pci_get_bdf(dev)));
-	dm_pci_write_config8(dev, PCI_SECONDARY_BUS, sub_bus);
+			     PCI_BUS(dm_pci_get_bdf(dev)) - ctlr->seq);
+	dm_pci_write_config8(dev, PCI_SECONDARY_BUS, sub_bus - ctlr->seq);
 	dm_pci_write_config8(dev, PCI_SUBORDINATE_BUS, 0xff);
 
 	if (pci_mem) {
@@ -257,7 +257,7 @@ void dm_pciauto_postscan_setup_bridge(struct udevice *dev, int sub_bus)
 	pci_io = ctlr_hose->pci_io;
 
 	/* Configure bus number registers */
-	dm_pci_write_config8(dev, PCI_SUBORDINATE_BUS, sub_bus);
+	dm_pci_write_config8(dev, PCI_SUBORDINATE_BUS, sub_bus - ctlr->seq);
 
 	if (pci_mem) {
 		/* Round memory allocator to 1MB boundary */
diff --git a/drivers/pci/pcie_dw_mvebu.c b/drivers/pci/pcie_dw_mvebu.c
index 202cfe9d03..a19885501c 100644
--- a/drivers/pci/pcie_dw_mvebu.c
+++ b/drivers/pci/pcie_dw_mvebu.c
@@ -162,6 +162,7 @@ static uintptr_t set_cfg_address(struct pcie_dw_mvebu *pcie,
 		/* Accessing root port configuration space. */
 		va_address = (uintptr_t)pcie->ctrl_base;
 	} else {
+		d = PCI_MASK_BUS(d) | (PCI_BUS(d) - pcie->first_busno);
 		writel(d << 8, pcie->ctrl_base + PCIE_ATU_LOWER_TARGET);
 		va_address = (uintptr_t)pcie->cfg_base;
 	}
diff --git a/drivers/pci/pcie_layerscape.c b/drivers/pci/pcie_layerscape.c
index 610f85c4e8..48fc4efc75 100644
--- a/drivers/pci/pcie_layerscape.c
+++ b/drivers/pci/pcie_layerscape.c
@@ -250,7 +250,7 @@ void *ls_pcie_conf_address(struct ls_pcie *pcie, pci_dev_t bdf,
 	if (PCI_BUS(bdf) == bus->seq)
 		return pcie->dbi + offset;
 
-	busdev = PCIE_ATU_BUS(PCI_BUS(bdf)) |
+	busdev = PCIE_ATU_BUS(PCI_BUS(bdf) - bus->seq) |
 		 PCIE_ATU_DEV(PCI_DEV(bdf)) |
 		 PCIE_ATU_FUNC(PCI_FUNC(bdf));
 
diff --git a/drivers/pci/pcie_xilinx.c b/drivers/pci/pcie_xilinx.c
index 4ba32df516..72fc0f3c43 100644
--- a/drivers/pci/pcie_xilinx.c
+++ b/drivers/pci/pcie_xilinx.c
@@ -105,6 +105,7 @@ static int pcie_xilinx_read_config(struct udevice *bus, pci_dev_t bdf,
 	void *address;
 	int err;
 
+	bdf = PCI_MASK_BUS(bdf) | (PCI_BUS(bdf) - bus->seq);
 	err = pcie_xilinx_config_address(pcie, bdf, offset, &address);
 	if (err < 0) {
 		*valuep = pci_get_ff(size);
@@ -148,6 +149,7 @@ static int pcie_xilinx_write_config(struct udevice *bus, pci_dev_t bdf,
 	void *address;
 	int err;
 
+	bdf = PCI_MASK_BUS(bdf) | (PCI_BUS(bdf) - bus->seq);
 	err = pcie_xilinx_config_address(pcie, bdf, offset, &address);
 	if (err < 0)
 		return 0;
-- 
2.14.1