Linux/AM5728: PCIe EP configuration

wenbo he

Dear TI experts,

Referring to http://software-dl.ti.com/processor-sdk-linux/esd/docs/latest/linux/Foundational_Components_Kernel_Drivers.html#pcie-end-point

I modified below DTS files. But I unable to enable pcie EP mode.

vim arch/arm/boot/dts/dra7-evm-common.dtsi
vim arch/arm/boot/dts/dra72-evm-common.dtsi
vim arch/arm/boot/dts/am572x-idk-common.dtsi
vim arch/arm64/boot/dts/ti/k3-am654-pcie-usb3.dtso
vim arch/arm64/boot/dts/ti/k3-am654-pcie-usb2.dtso
vim arch/arm/boot/dts/dra7.dtsi
vim arch/arm/boot/dts/am57xx-beagle-x15-common.dtsi:

Boot log:

[ 0.701033] pinctrl-single 4a003400.pinmux: 282 pins at pa fc003400 size 1128
[ 0.704478] dra7-pcie 51000000.pcie: Linked as a consumer to phy-4a094000.pciephy.3
[ 0.704844] OF: PCI: host bridge /ocp/axi@0/pcie@51000000 ranges:
[ 0.704882] OF: PCI: IO 0x20003000..0x20012fff -> 0x00000000
[ 0.704905] OF: PCI: MEM 0x20013000..0x2fffffff -> 0x20013000
[ 1.705203] dra7-pcie 51000000.pcie: phy link never came up
[ 1.705342] dra7-pcie 51000000.pcie: PCI host bridge to bus 0000:00
[ 1.705356] pci_bus 0000:00: root bus resource [bus 00-ff]
[ 1.705368] pci_bus 0000:00: root bus resource [io 0x0000-0xffff]
[ 1.705380] pci_bus 0000:00: root bus resource [mem 0x20013000-0x2fffffff]
[ 1.705696] PCI: bus0: Fast back to back transfers disabled
[ 1.705786] PCI: bus1: Fast back to back transfers enabled
[ 1.705825] pci 0000:00:00.0: BAR 0: assigned [mem 0x20100000-0x201fffff 64bit]
[ 1.705844] pci 0000:00:00.0: PCI bridge to [bus 01-ff]
[ 1.706167] pcieport 0000:00:00.0: Signaling PME with IRQ 174
[ 1.706291] pcieport 0000:00:00.0: AER enabled with IRQ 174

There is no pcie_epc
am57xevm:/ # ls /sys/class/pci_epc/
am57xevm:/ #

Thanks in advance!

B.R.

over 6 years ago

0 wenbo he over 6 years ago

Prodigy 50 points

DTS changes

change log;
ti-processor-sdk-android-am57xx-evm-05.03.00.07/board-support/linux-4.14.80+gitAUTOINC+384658809d-g384658809d/

arch/arm/boot/dts/dra7.dtsi
pcie1_ep: pcie_ep@51000000 {
compatible = "ti,dra7-pcie-ep";
reg = <0x51000000 0x28>, <0x51002000 0x14c>, <0x51001000 0x28>, <0x1000 0x10000000>;
reg-names = "ep_dbics", "ti_conf", "ep_dbics2", "addr_space";
interrupts = <0 232 0x4>;
num-lanes = <1>;
num-ib-windows = <4>;
num-ob-windows = <16>;
ti,hwmods = "pcie1";
phys = <&pcie1_phy>;
phy-names = "pcie-phy0";
ti,syscon-unaligned-access = <&scm_conf1 0x14 1>;
ti,syscon-conf = <&scm_conf>;
ti,syscon-pcie = <&scm_conf_pcie>;
+ status = "okay";
- status = "disabled";
};

arch/arm/boot/dts/dra7-evm-common.dtsi
< &pcie1_ep {
---
> &pcie1_rc {

&pcie1_ep {
status = "okay";
};

arch/arm/boot/dts/dra72-evm-common.dtsi
< &pcie1_ep {
---
> &pcie1_rc {

&pcie1_ep {
status = "okay";
};

arch/arm/boot/dts/am572x-idk-common.dtsi
107a108
> status = "okay";
112d112
< status = "okay";

&pcie1_rc {
gpios = <&gpio3 23 GPIO_ACTIVE_HIGH>;
};

&pcie1_ep {
status = "okay";
gpios = <&gpio3 23 GPIO_ACTIVE_HIGH>;
};

arch/arm/boot/dts/am57xx-beagle-x15-common.dtsi

&pcie1_ep {
status = "ok";
gpios = <&gpio2 8 GPIO_ACTIVE_LOW>;
};

&pcie1_rc {
gpios = <&gpio2 8 GPIO_ACTIVE_LOW>;
};

arch/arm64/boot/dts/ti/k3-am654-pcie-usb3.dtso
&pcie1_ep {
phys = <&serdes1 PHY_TYPE_PCIE 0>;
phy-names = "pcie-phy0";
status = "okay";
};
arch/arm64/boot/dts/ti/k3-am654-pcie-usb2.dtso
&pcie0_ep {
num-lanes = <2>;
phys = <&serdes0 PHY_TYPE_PCIE 1>, <&serdes1 PHY_TYPE_PCIE 1>;
phy-names = "pcie-phy0", "pcie-phy1";
status = "okay";
};

0 Bin Liu over 6 years ago in reply to wenbo he

TI__Guru**** 174421 points

Hi,

Is this on TI AM572x IDK evm?

The DTS changes you provided is not readable, but here is the patch I use to enable EP mode on the IDK evm.

diff --git a/arch/arm/boot/dts/am572x-idk-common.dtsi b/arch/arm/boot/dts/am572x-idk-common.dtsi
index f3aaab94b061..51eb1cf71fd7 100644
--- a/arch/arm/boot/dts/am572x-idk-common.dtsi
+++ b/arch/arm/boot/dts/am572x-idk-common.dtsi
@@ -105,11 +105,11 @@
 };
 
 &pcie1_rc {
-       status = "okay";
        gpios = <&gpio3 23 GPIO_ACTIVE_HIGH>;
 };
 
 &pcie1_ep {
+       status = "okay";
        gpios = <&gpio3 23 GPIO_ACTIVE_HIGH>;
 };

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Linux/AM5728: PCIe EP configuration