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linux/drivers/pci/controller/dwc/Kconfig
Shashank Babu Chinta Venkata d45736b598
PCI: qcom: Add equalization settings for 16.0 GT/s 
During high data transmission rates such as 16.0 GT/s, there is an
increased risk of signal loss due to poor channel quality and
interference. This can impact receiver's ability to capture signals
accurately.

Hence, as signal compensation is achieved through appropriate lane
equalization, apply lane equalization settings at both transmitter
and receiver which results in an increase in the PCIe signal strength.

While at it, modify the pcie-tegra194 driver to make use of the
common GEN3_EQ_CONTROL_OFF definitions in pcie-designware.h.

Link: https://lore.kernel.org/linux-pci/20240911-pci-qcom-gen4-stability-v7-3-743f5c1fd027@linaro.org
Tested-by: Johan Hovold <johan+linaro@kernel.org>
Signed-off-by: Shashank Babu Chinta Venkata <quic_schintav@quicinc.com>
[mani: dropped the code refactoring and minor changes]
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
[kwilczynski: commit log]
Signed-off-by: Krzysztof Wilczyński <kwilczynski@kernel.org>
Reviewed-by: Johan Hovold <johan+linaro@kernel.org>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
2024-09-13 14:44:57 +00:00

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# SPDX-License-Identifier: GPL-2.0
menu "DesignWare-based PCIe controllers"
depends on PCI
config PCIE_DW
bool
config PCIE_DW_HOST
bool
select PCIE_DW
config PCIE_DW_EP
bool
select PCIE_DW
config PCIE_AL
bool "Amazon Annapurna Labs PCIe controller"
depends on OF && (ARM64 || COMPILE_TEST)
depends on PCI_MSI
select PCIE_DW_HOST
select PCI_ECAM
help
Say Y here to enable support of the Amazon's Annapurna Labs PCIe
controller IP on Amazon SoCs. The PCIe controller uses the DesignWare
core plus Annapurna Labs proprietary hardware wrappers. This is
required only for DT-based platforms. ACPI platforms with the
Annapurna Labs PCIe controller don't need to enable this.
config PCI_MESON
tristate "Amlogic Meson PCIe controller"
default m if ARCH_MESON
depends on PCI_MSI
select PCIE_DW_HOST
help
Say Y here if you want to enable PCI controller support on Amlogic
SoCs. The PCI controller on Amlogic is based on DesignWare hardware
and therefore the driver re-uses the DesignWare core functions to
implement the driver.
config PCIE_ARTPEC6
bool
config PCIE_ARTPEC6_HOST
bool "Axis ARTPEC-6 PCIe controller (host mode)"
depends on MACH_ARTPEC6 || COMPILE_TEST
depends on PCI_MSI
select PCIE_DW_HOST
select PCIE_ARTPEC6
help
Enables support for the PCIe controller in the ARTPEC-6 SoC to work in
host mode. This uses the DesignWare core.
config PCIE_ARTPEC6_EP
bool "Axis ARTPEC-6 PCIe controller (endpoint mode)"
depends on MACH_ARTPEC6 || COMPILE_TEST
depends on PCI_ENDPOINT
select PCIE_DW_EP
select PCIE_ARTPEC6
help
Enables support for the PCIe controller in the ARTPEC-6 SoC to work in
endpoint mode. This uses the DesignWare core.
config PCIE_BT1
tristate "Baikal-T1 PCIe controller"
depends on MIPS_BAIKAL_T1 || COMPILE_TEST
depends on PCI_MSI
select PCIE_DW_HOST
help
Enables support for the PCIe controller in the Baikal-T1 SoC to work
in host mode. It's based on the Synopsys DWC PCIe v4.60a IP-core.
config PCI_IMX6
bool
config PCI_IMX6_HOST
bool "Freescale i.MX6/7/8 PCIe controller (host mode)"
depends on ARCH_MXC || COMPILE_TEST
depends on PCI_MSI
select PCIE_DW_HOST
select PCI_IMX6
help
Enables support for the PCIe controller in the i.MX SoCs to
work in Root Complex mode. The PCI controller on i.MX is based
on DesignWare hardware and therefore the driver re-uses the
DesignWare core functions to implement the driver.
config PCI_IMX6_EP
bool "Freescale i.MX6/7/8 PCIe controller (endpoint mode)"
depends on ARCH_MXC || COMPILE_TEST
depends on PCI_ENDPOINT
select PCIE_DW_EP
select PCI_IMX6
help
Enables support for the PCIe controller in the i.MX SoCs to
work in endpoint mode. The PCI controller on i.MX is based
on DesignWare hardware and therefore the driver re-uses the
DesignWare core functions to implement the driver.
config PCI_LAYERSCAPE
bool "Freescale Layerscape PCIe controller (host mode)"
depends on OF && (ARM || ARCH_LAYERSCAPE || COMPILE_TEST)
depends on PCI_MSI
select PCIE_DW_HOST
select MFD_SYSCON
help
Say Y here if you want to enable PCIe controller support on Layerscape
SoCs to work in Host mode.
This controller can work either as EP or RC. The RCW[HOST_AGT_PEX]
determines which PCIe controller works in EP mode and which PCIe
controller works in RC mode.
config PCI_LAYERSCAPE_EP
bool "Freescale Layerscape PCIe controller (endpoint mode)"
depends on OF && (ARM || ARCH_LAYERSCAPE || COMPILE_TEST)
depends on PCI_ENDPOINT
select PCIE_DW_EP
help
Say Y here if you want to enable PCIe controller support on Layerscape
SoCs to work in Endpoint mode.
This controller can work either as EP or RC. The RCW[HOST_AGT_PEX]
determines which PCIe controller works in EP mode and which PCIe
controller works in RC mode.
config PCI_HISI
depends on OF && (ARM64 || COMPILE_TEST)
bool "HiSilicon Hip05 and Hip06 SoCs PCIe controller"
depends on PCI_MSI
select PCIE_DW_HOST
select PCI_HOST_COMMON
help
Say Y here if you want PCIe controller support on HiSilicon
Hip05 and Hip06 SoCs
config PCIE_KIRIN
depends on OF && (ARM64 || COMPILE_TEST)
tristate "HiSilicon Kirin PCIe controller"
depends on PCI_MSI
select PCIE_DW_HOST
select REGMAP_MMIO
help
Say Y here if you want PCIe controller support
on HiSilicon Kirin series SoCs.
config PCIE_HISI_STB
bool "HiSilicon STB PCIe controller"
depends on ARCH_HISI || COMPILE_TEST
depends on PCI_MSI
select PCIE_DW_HOST
help
Say Y here if you want PCIe controller support on HiSilicon STB SoCs
config PCIE_INTEL_GW
bool "Intel Gateway PCIe controller "
depends on OF && (X86 || COMPILE_TEST)
depends on PCI_MSI
select PCIE_DW_HOST
help
Say 'Y' here to enable PCIe Host controller support on Intel
Gateway SoCs.
The PCIe controller uses the DesignWare core plus Intel-specific
hardware wrappers.
config PCIE_KEEMBAY
bool
config PCIE_KEEMBAY_HOST
bool "Intel Keem Bay PCIe controller (host mode)"
depends on ARCH_KEEMBAY || COMPILE_TEST
depends on PCI_MSI
select PCIE_DW_HOST
select PCIE_KEEMBAY
help
Say 'Y' here to enable support for the PCIe controller in Keem Bay
to work in host mode.
The PCIe controller is based on DesignWare Hardware and uses
DesignWare core functions.
config PCIE_KEEMBAY_EP
bool "Intel Keem Bay PCIe controller (endpoint mode)"
depends on ARCH_KEEMBAY || COMPILE_TEST
depends on PCI_MSI
depends on PCI_ENDPOINT
select PCIE_DW_EP
select PCIE_KEEMBAY
help
Say 'Y' here to enable support for the PCIe controller in Keem Bay
to work in endpoint mode.
The PCIe controller is based on DesignWare Hardware and uses
DesignWare core functions.
config PCIE_ARMADA_8K
bool "Marvell Armada-8K PCIe controller"
depends on ARCH_MVEBU || COMPILE_TEST
depends on PCI_MSI
select PCIE_DW_HOST
help
Say Y here if you want to enable PCIe controller support on
Armada-8K SoCs. The PCIe controller on Armada-8K is based on
DesignWare hardware and therefore the driver re-uses the
DesignWare core functions to implement the driver.
config PCIE_TEGRA194
tristate
config PCIE_TEGRA194_HOST
tristate "NVIDIA Tegra194 (and later) PCIe controller (host mode)"
depends on ARCH_TEGRA_194_SOC || COMPILE_TEST
depends on PCI_MSI
select PCIE_DW_HOST
select PHY_TEGRA194_P2U
select PCIE_TEGRA194
help
Enables support for the PCIe controller in the NVIDIA Tegra194 SoC to
work in host mode. There are two instances of PCIe controllers in
Tegra194. This controller can work either as EP or RC. In order to
enable host-specific features PCIE_TEGRA194_HOST must be selected and
in order to enable device-specific features PCIE_TEGRA194_EP must be
selected. This uses the DesignWare core.
config PCIE_TEGRA194_EP
tristate "NVIDIA Tegra194 (and later) PCIe controller (endpoint mode)"
depends on ARCH_TEGRA_194_SOC || COMPILE_TEST
depends on PCI_ENDPOINT
select PCIE_DW_EP
select PHY_TEGRA194_P2U
select PCIE_TEGRA194
help
Enables support for the PCIe controller in the NVIDIA Tegra194 SoC to
work in endpoint mode. There are two instances of PCIe controllers in
Tegra194. This controller can work either as EP or RC. In order to
enable host-specific features PCIE_TEGRA194_HOST must be selected and
in order to enable device-specific features PCIE_TEGRA194_EP must be
selected. This uses the DesignWare core.
config PCIE_DW_PLAT
bool
config PCIE_DW_PLAT_HOST
bool "Platform bus based DesignWare PCIe controller (host mode)"
depends on PCI_MSI
select PCIE_DW_HOST
select PCIE_DW_PLAT
help
Enables support for the PCIe controller in the Designware IP to
work in host mode. There are two instances of PCIe controller in
Designware IP.
This controller can work either as EP or RC. In order to enable
host-specific features PCIE_DW_PLAT_HOST must be selected and in
order to enable device-specific features PCI_DW_PLAT_EP must be
selected.
config PCIE_DW_PLAT_EP
bool "Platform bus based DesignWare PCIe controller (endpoint mode)"
depends on PCI && PCI_MSI
depends on PCI_ENDPOINT
select PCIE_DW_EP
select PCIE_DW_PLAT
help
Enables support for the PCIe controller in the Designware IP to
work in endpoint mode. There are two instances of PCIe controller
in Designware IP.
This controller can work either as EP or RC. In order to enable
host-specific features PCIE_DW_PLAT_HOST must be selected and in
order to enable device-specific features PCI_DW_PLAT_EP must be
selected.
config PCIE_QCOM_COMMON
bool
config PCIE_QCOM
bool "Qualcomm PCIe controller (host mode)"
depends on OF && (ARCH_QCOM || COMPILE_TEST)
depends on PCI_MSI
select PCIE_DW_HOST
select CRC8
select PCIE_QCOM_COMMON
help
Say Y here to enable PCIe controller support on Qualcomm SoCs. The
PCIe controller uses the DesignWare core plus Qualcomm-specific
hardware wrappers.
config PCIE_QCOM_EP
tristate "Qualcomm PCIe controller (endpoint mode)"
depends on OF && (ARCH_QCOM || COMPILE_TEST)
depends on PCI_ENDPOINT
select PCIE_DW_EP
select PCIE_QCOM_COMMON
help
Say Y here to enable support for the PCIe controllers on Qualcomm SoCs
to work in endpoint mode. The PCIe controller uses the DesignWare core
plus Qualcomm-specific hardware wrappers.
config PCIE_RCAR_GEN4
tristate
config PCIE_RCAR_GEN4_HOST
tristate "Renesas R-Car Gen4 PCIe controller (host mode)"
depends on ARCH_RENESAS || COMPILE_TEST
depends on PCI_MSI
select PCIE_DW_HOST
select PCIE_RCAR_GEN4
help
Say Y here if you want PCIe controller (host mode) on R-Car Gen4 SoCs.
To compile this driver as a module, choose M here: the module will be
called pcie-rcar-gen4.ko. This uses the DesignWare core.
config PCIE_RCAR_GEN4_EP
tristate "Renesas R-Car Gen4 PCIe controller (endpoint mode)"
depends on ARCH_RENESAS || COMPILE_TEST
depends on PCI_ENDPOINT
select PCIE_DW_EP
select PCIE_RCAR_GEN4
help
Say Y here if you want PCIe controller (endpoint mode) on R-Car Gen4
SoCs. To compile this driver as a module, choose M here: the module
will be called pcie-rcar-gen4.ko. This uses the DesignWare core.
config PCIE_ROCKCHIP_DW
bool
config PCIE_ROCKCHIP_DW_HOST
bool "Rockchip DesignWare PCIe controller (host mode)"
depends on PCI_MSI
depends on ARCH_ROCKCHIP || COMPILE_TEST
depends on OF
select PCIE_DW_HOST
select PCIE_ROCKCHIP_DW
help
Enables support for the DesignWare PCIe controller in the
Rockchip SoC (except RK3399) to work in host mode.
config PCIE_ROCKCHIP_DW_EP
bool "Rockchip DesignWare PCIe controller (endpoint mode)"
depends on ARCH_ROCKCHIP || COMPILE_TEST
depends on OF
depends on PCI_ENDPOINT
select PCIE_DW_EP
select PCIE_ROCKCHIP_DW
help
Enables support for the DesignWare PCIe controller in the
Rockchip SoC (except RK3399) to work in endpoint mode.
config PCI_EXYNOS
tristate "Samsung Exynos PCIe controller"
depends on ARCH_EXYNOS || COMPILE_TEST
depends on PCI_MSI
select PCIE_DW_HOST
help
Enables support for the PCIe controller in the Samsung Exynos SoCs
to work in host mode. The PCI controller is based on the DesignWare
hardware and therefore the driver re-uses the DesignWare core
functions to implement the driver.
config PCIE_FU740
bool "SiFive FU740 PCIe controller"
depends on PCI_MSI
depends on ARCH_SIFIVE || COMPILE_TEST
select PCIE_DW_HOST
help
Say Y here if you want PCIe controller support for the SiFive
FU740.
config PCIE_UNIPHIER
bool "Socionext UniPhier PCIe controller (host mode)"
depends on ARCH_UNIPHIER || COMPILE_TEST
depends on OF && HAS_IOMEM
depends on PCI_MSI
select PCIE_DW_HOST
help
Say Y here if you want PCIe host controller support on UniPhier SoCs.
This driver supports LD20 and PXs3 SoCs.
config PCIE_UNIPHIER_EP
bool "Socionext UniPhier PCIe controller (endpoint mode)"
depends on ARCH_UNIPHIER || COMPILE_TEST
depends on OF && HAS_IOMEM
depends on PCI_ENDPOINT
select PCIE_DW_EP
help
Say Y here if you want PCIe endpoint controller support on
UniPhier SoCs. This driver supports Pro5 SoC.
config PCIE_SPEAR13XX
bool "STMicroelectronics SPEAr PCIe controller"
depends on ARCH_SPEAR13XX || COMPILE_TEST
depends on PCI_MSI
select PCIE_DW_HOST
help
Say Y here if you want PCIe support on SPEAr13XX SoCs.
config PCI_DRA7XX
tristate
config PCI_DRA7XX_HOST
tristate "TI DRA7xx PCIe controller (host mode)"
depends on SOC_DRA7XX || COMPILE_TEST
depends on OF && HAS_IOMEM && TI_PIPE3
depends on PCI_MSI
select PCIE_DW_HOST
select PCI_DRA7XX
default y if SOC_DRA7XX
help
Enables support for the PCIe controller in the DRA7xx SoC to work in
host mode. There are two instances of PCIe controller in DRA7xx.
This controller can work either as EP or RC. In order to enable
host-specific features PCI_DRA7XX_HOST must be selected and in order
to enable device-specific features PCI_DRA7XX_EP must be selected.
This uses the DesignWare core.
config PCI_DRA7XX_EP
tristate "TI DRA7xx PCIe controller (endpoint mode)"
depends on SOC_DRA7XX || COMPILE_TEST
depends on OF && HAS_IOMEM && TI_PIPE3
depends on PCI_ENDPOINT
select PCIE_DW_EP
select PCI_DRA7XX
help
Enables support for the PCIe controller in the DRA7xx SoC to work in
endpoint mode. There are two instances of PCIe controller in DRA7xx.
This controller can work either as EP or RC. In order to enable
host-specific features PCI_DRA7XX_HOST must be selected and in order
to enable device-specific features PCI_DRA7XX_EP must be selected.
This uses the DesignWare core.
config PCI_KEYSTONE
bool
config PCI_KEYSTONE_HOST
bool "TI Keystone PCIe controller (host mode)"
depends on ARCH_KEYSTONE || ARCH_K3 || COMPILE_TEST
depends on PCI_MSI
select PCIE_DW_HOST
select PCI_KEYSTONE
help
Enables support for the PCIe controller in the Keystone SoC to
work in host mode. The PCI controller on Keystone is based on
DesignWare hardware and therefore the driver re-uses the
DesignWare core functions to implement the driver.
config PCI_KEYSTONE_EP
bool "TI Keystone PCIe controller (endpoint mode)"
depends on ARCH_KEYSTONE || ARCH_K3 || COMPILE_TEST
depends on PCI_ENDPOINT
select PCIE_DW_EP
select PCI_KEYSTONE
help
Enables support for the PCIe controller in the Keystone SoC to
work in endpoint mode. The PCI controller on Keystone is based
on DesignWare hardware and therefore the driver re-uses the
DesignWare core functions to implement the driver.
config PCIE_VISCONTI_HOST
bool "Toshiba Visconti PCIe controller"
depends on ARCH_VISCONTI || COMPILE_TEST
depends on PCI_MSI
select PCIE_DW_HOST
help
Say Y here if you want PCIe controller support on Toshiba Visconti SoC.
This driver supports TMPV7708 SoC.
endmenu
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