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Old bootloader (same ones which have DT disabled) don't perform any PCIe initialization. The consequence is a freeze during PCIe bring-up on these old u-boot. Same kernel with a newer bootloaders works fine as they contain the corresponding PCIe init code. In this change, we'll add the missing init and make sure the kernel doesn't rely on some preexisting init to get PCIe to work. That includes the following changes: *GPIOs: set function & drive strength *Clocks: add init code for aux & ref clocks *PCIe driver: additional init of the hardware controller Tested 3.18 and 4.1 on an AP148 with bootloader branch 0.0.1 Signed-off-by: Mathieu Olivari <mathieu@codeaurora.org> SVN-Revision: 46557
267 lines
7.1 KiB
Diff
267 lines
7.1 KiB
Diff
From 5b40516b2f5fb9b2a7d6d3e2e924f12ec9d183a8 Mon Sep 17 00:00:00 2001
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From: Mathieu Olivari <mathieu@codeaurora.org>
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Date: Tue, 21 Apr 2015 19:01:42 -0700
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Subject: [PATCH 8/9] ARM: dts: qcom: add pcie nodes to ipq806x platforms
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qcom-pcie driver now supports version 0 of the controller. This change
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adds the corresponding entries to the IPQ806x dtsi file and
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corresponding platform (AP148).
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Signed-off-by: Mathieu Olivari <mathieu@codeaurora.org>
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---
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arch/arm/boot/dts/qcom-ipq8064-ap148.dts | 30 ++++++++
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arch/arm/boot/dts/qcom-ipq8064.dtsi | 124 +++++++++++++++++++++++++++++++
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2 files changed, 154 insertions(+)
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--- a/arch/arm/boot/dts/qcom-ipq8064-ap148.dts
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+++ b/arch/arm/boot/dts/qcom-ipq8064-ap148.dts
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@@ -35,6 +35,24 @@
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bias-disable;
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};
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+ pcie0_pins: pcie0_pinmux {
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+ mux {
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+ pins = "gpio3";
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+ function = "pcie1_rst";
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+ drive-strength = <12>;
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+ bias-disable;
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+ };
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+ };
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+
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+ pcie1_pins: pcie1_pinmux {
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+ mux {
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+ pins = "gpio48";
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+ function = "pcie2_rst";
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+ drive-strength = <12>;
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+ bias-disable;
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+ };
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+ };
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+
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spi_pins: spi_pins {
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mux {
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pins = "gpio18", "gpio19", "gpio21";
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@@ -138,5 +156,19 @@
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usb30@1 {
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status = "ok";
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};
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+
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+ pcie0: pci@1b500000 {
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+ status = "ok";
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+ reset-gpio = <&qcom_pinmux 3 0>;
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+ pinctrl-0 = <&pcie0_pins>;
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+ pinctrl-names = "default";
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+ };
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+
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+ pcie1: pci@1b700000 {
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+ status = "ok";
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+ reset-gpio = <&qcom_pinmux 48 0>;
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+ pinctrl-0 = <&pcie1_pins>;
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+ pinctrl-names = "default";
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+ };
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};
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};
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--- a/arch/arm/boot/dts/qcom-ipq8064-db149.dts
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+++ b/arch/arm/boot/dts/qcom-ipq8064-db149.dts
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@@ -30,6 +30,33 @@
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bias-disable;
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};
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+ pcie0_pins: pcie0_pinmux {
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+ mux {
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+ pins = "gpio3";
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+ function = "pcie1_rst";
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+ drive-strength = <12>;
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+ bias-disable;
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+ };
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+ };
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+
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+ pcie1_pins: pcie1_pinmux {
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+ mux {
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+ pins = "gpio48";
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+ function = "pcie2_rst";
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+ drive-strength = <12>;
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+ bias-disable;
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+ };
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+ };
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+
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+ pcie2_pins: pcie2_pinmux {
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+ mux {
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+ pins = "gpio63";
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+ function = "pcie3_rst";
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+ drive-strength = <12>;
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+ bias-disable;
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+ };
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+ };
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+
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spi_pins: spi_pins {
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mux {
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pins = "gpio18", "gpio19", "gpio21";
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@@ -128,5 +155,26 @@
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usb30@1 {
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status = "ok";
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};
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+
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+ pcie0: pci@1b500000 {
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+ status = "ok";
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+ reset-gpio = <&qcom_pinmux 3 0>;
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+ pinctrl-0 = <&pcie0_pins>;
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+ pinctrl-names = "default";
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+ };
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+
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+ pcie1: pci@1b700000 {
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+ status = "ok";
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+ reset-gpio = <&qcom_pinmux 48 0>;
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+ pinctrl-0 = <&pcie1_pins>;
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+ pinctrl-names = "default";
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+ };
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+
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+ pcie2: pci@1b900000 {
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+ status = "ok";
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+ reset-gpio = <&qcom_pinmux 63 0>;
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+ pinctrl-0 = <&pcie2_pins>;
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+ pinctrl-names = "default";
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+ };
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};
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};
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--- a/arch/arm/boot/dts/qcom-ipq8064.dtsi
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+++ b/arch/arm/boot/dts/qcom-ipq8064.dtsi
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@@ -3,6 +3,8 @@
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#include "skeleton.dtsi"
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#include <dt-bindings/clock/qcom,gcc-ipq806x.h>
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#include <dt-bindings/soc/qcom,gsbi.h>
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+#include <dt-bindings/reset/qcom,gcc-ipq806x.h>
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+#include <dt-bindings/interrupt-controller/arm-gic.h>
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/ {
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model = "Qualcomm IPQ8064";
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@@ -306,6 +308,129 @@
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#reset-cells = <1>;
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};
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+ pcie0: pci@1b500000 {
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+ compatible = "qcom,pcie-v0";
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+ reg = <0x1b500000 0x1000
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+ 0x1b502000 0x80
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+ 0x1b600000 0x100
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+ 0x0ff00000 0x100000>;
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+ reg-names = "dbi", "elbi", "parf", "config";
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+ device_type = "pci";
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+ linux,pci-domain = <0>;
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+ bus-range = <0x00 0xff>;
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+ num-lanes = <1>;
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+ #address-cells = <3>;
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+ #size-cells = <2>;
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+
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+ ranges = <0x81000000 0 0 0x0fe00000 0 0x00100000 /* downstream I/O */
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+ 0x82000000 0 0x00000000 0x08000000 0 0x07e00000>; /* non-prefetchable memory */
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+
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+ interrupts = <GIC_SPI 35 IRQ_TYPE_NONE>;
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+ interrupt-names = "msi";
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+ #interrupt-cells = <1>;
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+ interrupt-map-mask = <0 0 0 0x7>;
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+ interrupt-map = <0 0 0 1 &intc 0 36 IRQ_TYPE_LEVEL_HIGH>, /* int_a */
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+ <0 0 0 2 &intc 0 37 IRQ_TYPE_LEVEL_HIGH>, /* int_b */
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+ <0 0 0 3 &intc 0 38 IRQ_TYPE_LEVEL_HIGH>, /* int_c */
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+ <0 0 0 4 &intc 0 39 IRQ_TYPE_LEVEL_HIGH>; /* int_d */
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+
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+ clocks = <&gcc PCIE_A_CLK>,
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+ <&gcc PCIE_H_CLK>,
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+ <&gcc PCIE_PHY_CLK>;
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+ clock-names = "core", "iface", "phy";
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+
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+ resets = <&gcc PCIE_ACLK_RESET>,
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+ <&gcc PCIE_HCLK_RESET>,
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+ <&gcc PCIE_POR_RESET>,
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+ <&gcc PCIE_PCI_RESET>,
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+ <&gcc PCIE_PHY_RESET>;
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+ reset-names = "axi", "ahb", "por", "pci", "phy";
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+
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+ status = "disabled";
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+ };
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+
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+ pcie1: pci@1b700000 {
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+ compatible = "qcom,pcie-v0";
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+ reg = <0x1b700000 0x1000
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+ 0x1b702000 0x80
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+ 0x1b800000 0x100
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+ 0x31f00000 0x100000>;
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+ reg-names = "dbi", "elbi", "parf", "config";
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+ device_type = "pci";
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+ linux,pci-domain = <1>;
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+ bus-range = <0x00 0xff>;
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+ num-lanes = <1>;
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+ #address-cells = <3>;
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+ #size-cells = <2>;
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+
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+ ranges = <0x81000000 0 0 0x31e00000 0 0x00100000 /* downstream I/O */
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+ 0x82000000 0 0x00000000 0x2e000000 0 0x03e00000>; /* non-prefetchable memory */
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+
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+ interrupts = <GIC_SPI 57 IRQ_TYPE_NONE>;
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+ interrupt-names = "msi";
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+ #interrupt-cells = <1>;
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+ interrupt-map-mask = <0 0 0 0x7>;
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+ interrupt-map = <0 0 0 1 &intc 0 58 IRQ_TYPE_LEVEL_HIGH>, /* int_a */
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+ <0 0 0 2 &intc 0 59 IRQ_TYPE_LEVEL_HIGH>, /* int_b */
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+ <0 0 0 3 &intc 0 60 IRQ_TYPE_LEVEL_HIGH>, /* int_c */
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+ <0 0 0 4 &intc 0 61 IRQ_TYPE_LEVEL_HIGH>; /* int_d */
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+
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+ clocks = <&gcc PCIE_1_A_CLK>,
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+ <&gcc PCIE_1_H_CLK>,
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+ <&gcc PCIE_1_PHY_CLK>;
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+ clock-names = "core", "iface", "phy";
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+
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+ resets = <&gcc PCIE_1_ACLK_RESET>,
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+ <&gcc PCIE_1_HCLK_RESET>,
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+ <&gcc PCIE_1_POR_RESET>,
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+ <&gcc PCIE_1_PCI_RESET>,
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+ <&gcc PCIE_1_PHY_RESET>;
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+ reset-names = "axi", "ahb", "por", "pci", "phy";
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+
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+ status = "disabled";
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+ };
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+
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+ pcie2: pci@1b900000 {
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+ compatible = "qcom,pcie-v0";
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+ reg = <0x1b900000 0x1000
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+ 0x1b902000 0x80
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+ 0x1ba00000 0x100
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+ 0x35f00000 0x100000>;
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+ reg-names = "dbi", "elbi", "parf", "config";
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+ device_type = "pci";
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+ linux,pci-domain = <2>;
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+ bus-range = <0x00 0xff>;
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+ num-lanes = <1>;
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+ #address-cells = <3>;
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+ #size-cells = <2>;
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+
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+ ranges = <0x81000000 0 0 0x35e00000 0 0x00100000 /* downstream I/O */
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+ 0x82000000 0 0x00000000 0x32000000 0 0x03e00000>; /* non-prefetchable memory */
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+
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+ interrupts = <GIC_SPI 71 IRQ_TYPE_NONE>;
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+ interrupt-names = "msi";
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+ #interrupt-cells = <1>;
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+ interrupt-map-mask = <0 0 0 0x7>;
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+ interrupt-map = <0 0 0 1 &intc 0 72 IRQ_TYPE_LEVEL_HIGH>, /* int_a */
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+ <0 0 0 2 &intc 0 73 IRQ_TYPE_LEVEL_HIGH>, /* int_b */
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+ <0 0 0 3 &intc 0 74 IRQ_TYPE_LEVEL_HIGH>, /* int_c */
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+ <0 0 0 4 &intc 0 75 IRQ_TYPE_LEVEL_HIGH>; /* int_d */
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+
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+ clocks = <&gcc PCIE_2_A_CLK>,
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+ <&gcc PCIE_2_H_CLK>,
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+ <&gcc PCIE_2_PHY_CLK>;
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+ clock-names = "core", "iface", "phy";
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+
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+ resets = <&gcc PCIE_2_ACLK_RESET>,
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+ <&gcc PCIE_2_HCLK_RESET>,
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+ <&gcc PCIE_2_POR_RESET>,
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+ <&gcc PCIE_2_PCI_RESET>,
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+ <&gcc PCIE_2_PHY_RESET>;
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+ reset-names = "axi", "ahb", "por", "pci", "phy";
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+
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+ status = "disabled";
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+ };
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+
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hs_phy_1: phy@100f8800 {
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compatible = "qcom,dwc3-hs-usb-phy";
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reg = <0x100f8800 0x30>;
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