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| author | Serge Semin <Sergey.Semin@baikalelectronics.ru> | 2022-06-24 17:39:36 +0300 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2022-08-01 15:02:11 -0500 |
| commit | 13e9d3900c20247993db68856d9898161acb403a (patch) | |
| tree | 28591d09a3a669fdc6f4587e4a3515fee0c8fdd7 /drivers/pci/controller/dwc/pcie-designware.h | |
| parent | afe1c6d50d33ea7d888b0105670fb2aaa5abf495 (diff) | |
| download | linux-13e9d3900c20247993db68856d9898161acb403a.tar.bz2 | |
PCI: dwc: Read DWC IP core version from register
Since DWC PCIe v4.70a, the controller version and version type can be read
from the PORT_LOGIC.PCIE_VERSION_OFF and PORT_LOGIC.PCIE_VERSION_TYPE_OFF
registers respectively.
Read the version from those registers and warn if if's different from the
version we got from the device tree.
We can only read the version after platform-specific drivers have done any
DBI-related initialization, such as reference clock activation.
[bhelgaas: commit log]
Link: https://lore.kernel.org/r/20220624143947.8991-5-Sergey.Semin@baikalelectronics.ru
Signed-off-by: Serge Semin <Sergey.Semin@baikalelectronics.ru>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Diffstat (limited to 'drivers/pci/controller/dwc/pcie-designware.h')
| -rw-r--r-- | drivers/pci/controller/dwc/pcie-designware.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/pci/controller/dwc/pcie-designware.h b/drivers/pci/controller/dwc/pcie-designware.h index 6b81530fb2ca..7899808bdbc6 100644 --- a/drivers/pci/controller/dwc/pcie-designware.h +++ b/drivers/pci/controller/dwc/pcie-designware.h @@ -85,6 +85,9 @@ #define PCIE_PORT_MULTI_LANE_CTRL 0x8C0 #define PORT_MLTI_UPCFG_SUPPORT BIT(7) +#define PCIE_VERSION_NUMBER 0x8F8 +#define PCIE_VERSION_TYPE 0x8FC + #define PCIE_ATU_VIEWPORT 0x900 #define PCIE_ATU_REGION_INBOUND BIT(31) #define PCIE_ATU_REGION_OUTBOUND 0 @@ -279,6 +282,7 @@ struct dw_pcie { struct dw_pcie_ep ep; const struct dw_pcie_ops *ops; u32 version; + u32 type; int num_lanes; int link_gen; u8 n_fts[2]; @@ -290,6 +294,8 @@ struct dw_pcie { #define to_dw_pcie_from_ep(endpoint) \ container_of((endpoint), struct dw_pcie, ep) +void dw_pcie_version_detect(struct dw_pcie *pci); + u8 dw_pcie_find_capability(struct dw_pcie *pci, u8 cap); u16 dw_pcie_find_ext_capability(struct dw_pcie *pci, u8 cap); |