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PCI: dwc: Add callbacks for accessing dbi2 address space

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Certain platforms like TI's AM654 do not have aseparate address space for
dbi2 instead they are accessed using the same address space as dbi
with some configuration bit set. In order to support such platforms,
add callbacks for accessing dbi2 address space.

Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
This commit is contained in:
Kishon Vijay Abraham I 2019-03-25 15:09:42 +05:30 • committed by Lorenzo Pieralisi
parent 421db1ab28
commit ddf567e3d9
2 changed files with 41 additions and 2 deletions
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31
drivers/pci/controller/dwc/pcie-designware.c
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@ -89,6 +89,37 @@ void __dw_pcie_write_dbi(struct dw_pcie *pci, void __iomem *base, u32 reg,
dev_err(pci->dev, "Write DBI address failed\n");
}
u32 __dw_pcie_read_dbi2(struct dw_pcie *pci, void __iomem *base, u32 reg,
size_t size)
{
int ret;
u32 val;
if (pci->ops->read_dbi2)
return pci->ops->read_dbi2(pci, base, reg, size);
ret = dw_pcie_read(base + reg, size, &val);
if (ret)
dev_err(pci->dev, "read DBI address failed\n");
return val;
}
void __dw_pcie_write_dbi2(struct dw_pcie *pci, void __iomem *base, u32 reg,
size_t size, u32 val)
{
int ret;
if (pci->ops->write_dbi2) {
pci->ops->write_dbi2(pci, base, reg, size, val);
return;
}
ret = dw_pcie_write(base + reg, size, val);
if (ret)
dev_err(pci->dev, "write DBI address failed\n");
}
static u32 dw_pcie_readl_ob_unroll(struct dw_pcie *pci, u32 index, u32 reg)
{
u32 offset = PCIE_GET_ATU_OUTB_UNR_REG_OFFSET(index);