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PCI: mobiveil: Add Header Type field check

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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@nxp.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Reviewed-by: Andrew Murray <amurray@thegoodpenguin.co.uk>
This commit is contained in:
Hou Zhiqiang 2020-02-13 12:06:40 +08:00 committed by Lorenzo Pieralisi
parent 029dea3cdc
commit 11d22cc395
1 changed files with 13 additions and 0 deletions
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13
drivers/pci/controller/mobiveil/pcie-mobiveil-host.c
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@ -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);