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| author | Pali Rohár <pali@kernel.org> | 2021-11-25 13:45:59 +0100 |
|---|---|---|
| committer | Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> | 2022-01-04 14:59:01 +0000 |
| commit | df08ac016124bd88b8598ac0599d7b89c0642774 (patch) | |
| tree | ce3c141ea4f9ff24c0ed8eaae4b635b159aefced /drivers/pci | |
| parent | e7a01876729c3e650c5f6ee446b71a309d1c55ab (diff) | |
| download | linux-stable-df08ac016124bd88b8598ac0599d7b89c0642774.tar.gz linux-stable-df08ac016124bd88b8598ac0599d7b89c0642774.tar.bz2 linux-stable-df08ac016124bd88b8598ac0599d7b89c0642774.zip | |
PCI: mvebu: Setup PCIe controller to Root Complex mode
This driver operates only in Root Complex mode, so ensure that hardware is
properly configured in Root Complex mode.
Link: https://lore.kernel.org/r/20211125124605.25915-10-pali@kernel.org
Signed-off-by: Pali Rohár <pali@kernel.org>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Diffstat (limited to 'drivers/pci')
| -rw-r--r-- | drivers/pci/controller/pci-mvebu.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/drivers/pci/controller/pci-mvebu.c b/drivers/pci/controller/pci-mvebu.c index edc774e8278b..506e05c3feb6 100644 --- a/drivers/pci/controller/pci-mvebu.c +++ b/drivers/pci/controller/pci-mvebu.c @@ -55,6 +55,7 @@ #define PCIE_MASK_ENABLE_INTS 0x0f000000 #define PCIE_CTRL_OFF 0x1a00 #define PCIE_CTRL_X1_MODE 0x0001 +#define PCIE_CTRL_RC_MODE BIT(1) #define PCIE_STAT_OFF 0x1a04 #define PCIE_STAT_BUS 0xff00 #define PCIE_STAT_DEV 0x1f0000 @@ -213,7 +214,12 @@ static void mvebu_pcie_setup_wins(struct mvebu_pcie_port *port) static void mvebu_pcie_setup_hw(struct mvebu_pcie_port *port) { - u32 cmd, mask; + u32 ctrl, cmd, mask; + + /* Setup PCIe controller to Root Complex mode. */ + ctrl = mvebu_readl(port, PCIE_CTRL_OFF); + ctrl |= PCIE_CTRL_RC_MODE; + mvebu_writel(port, ctrl, PCIE_CTRL_OFF); /* Disable Root Bridge I/O space, memory space and bus mastering. */ cmd = mvebu_readl(port, PCIE_CMD_OFF); |