diff options
| author | Rob Herring <robh@kernel.org> | 2020-08-20 21:53:50 -0600 |
|---|---|---|
| committer | Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> | 2020-09-08 16:37:02 +0100 |
| commit | 08d2209e798aedde0e0be7e39ed0165a6c77c178 (patch) | |
| tree | 27919be74dd2446f440c0b83e0455d832251dc49 /drivers/pci/controller/dwc/pci-exynos.c | |
| parent | 6408e6a7f9eec6fbd3f75680ad3983c79ccd446d (diff) | |
| download | lwn-08d2209e798aedde0e0be7e39ed0165a6c77c178.tar.gz lwn-08d2209e798aedde0e0be7e39ed0165a6c77c178.zip | |
PCI: dwc: exynos: Use pci_ops for root config space accessors
Now that DWC drivers can setup their own pci_ops for the root and child
buses, convert the Samsung Exynos driver to use the standard pci_ops for
root bus config accesses.
Link: https://lore.kernel.org/r/20200821035420.380495-11-robh@kernel.org
Signed-off-by: Rob Herring <robh@kernel.org>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Cc: Jingoo Han <jingoohan1@gmail.com>
Cc: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: Kukjin Kim <kgene@kernel.org>
Cc: Krzysztof Kozlowski <krzk@kernel.org>
Cc: linux-samsung-soc@vger.kernel.org
Diffstat (limited to 'drivers/pci/controller/dwc/pci-exynos.c')
| -rw-r--r-- | drivers/pci/controller/dwc/pci-exynos.c | 45 |
1 files changed, 25 insertions, 20 deletions
diff --git a/drivers/pci/controller/dwc/pci-exynos.c b/drivers/pci/controller/dwc/pci-exynos.c index 8d82c43ae299..242683cde04a 100644 --- a/drivers/pci/controller/dwc/pci-exynos.c +++ b/drivers/pci/controller/dwc/pci-exynos.c @@ -336,32 +336,37 @@ static void exynos_pcie_write_dbi(struct dw_pcie *pci, void __iomem *base, exynos_pcie_sideband_dbi_w_mode(ep, false); } -static int exynos_pcie_rd_own_conf(struct pcie_port *pp, int where, int size, - u32 *val) +static int exynos_pcie_rd_own_conf(struct pci_bus *bus, unsigned int devfn, + int where, int size, u32 *val) { - struct dw_pcie *pci = to_dw_pcie_from_pp(pp); - struct exynos_pcie *ep = to_exynos_pcie(pci); - int ret; + struct dw_pcie *pci = to_dw_pcie_from_pp(bus->sysdata); - exynos_pcie_sideband_dbi_r_mode(ep, true); - ret = dw_pcie_read(pci->dbi_base + where, size, val); - exynos_pcie_sideband_dbi_r_mode(ep, false); - return ret; + if (PCI_SLOT(devfn)) { + *val = ~0; + return PCIBIOS_DEVICE_NOT_FOUND; + } + + *val = dw_pcie_read_dbi(pci, where, size); + return PCIBIOS_SUCCESSFUL; } -static int exynos_pcie_wr_own_conf(struct pcie_port *pp, int where, int size, - u32 val) +static int exynos_pcie_wr_own_conf(struct pci_bus *bus, unsigned int devfn, + int where, int size, u32 val) { - struct dw_pcie *pci = to_dw_pcie_from_pp(pp); - struct exynos_pcie *ep = to_exynos_pcie(pci); - int ret; + struct dw_pcie *pci = to_dw_pcie_from_pp(bus->sysdata); - exynos_pcie_sideband_dbi_w_mode(ep, true); - ret = dw_pcie_write(pci->dbi_base + where, size, val); - exynos_pcie_sideband_dbi_w_mode(ep, false); - return ret; + if (PCI_SLOT(devfn)) + return PCIBIOS_DEVICE_NOT_FOUND; + + dw_pcie_write_dbi(pci, where, size, val); + return PCIBIOS_SUCCESSFUL; } +static struct pci_ops exynos_pci_ops = { + .read = exynos_pcie_rd_own_conf, + .write = exynos_pcie_wr_own_conf, +}; + static int exynos_pcie_link_up(struct dw_pcie *pci) { struct exynos_pcie *ep = to_exynos_pcie(pci); @@ -379,6 +384,8 @@ static int exynos_pcie_host_init(struct pcie_port *pp) struct dw_pcie *pci = to_dw_pcie_from_pp(pp); struct exynos_pcie *ep = to_exynos_pcie(pci); + pp->bridge->ops = &exynos_pci_ops; + exynos_pcie_establish_link(ep); exynos_pcie_enable_interrupts(ep); @@ -386,8 +393,6 @@ static int exynos_pcie_host_init(struct pcie_port *pp) } static const struct dw_pcie_host_ops exynos_pcie_host_ops = { - .rd_own_conf = exynos_pcie_rd_own_conf, - .wr_own_conf = exynos_pcie_wr_own_conf, .host_init = exynos_pcie_host_init, }; |