ipq806x: add support for Linksys EA7500 V1

This patch adds support for the Linksys EA7500 V1 router.

Specification:
 - CPU: Qualcomm IPQ8064
 - RAM: 256MB
 - Flash: NAND 128MB
 - WiFi: QCA9982 an+ac + QCA9983 bgn
 - Ethernet: 5 GBE Ports (WAN+ 4xLAN) (QCA8337)
 - USB: 1x USB 3.0 1x USB2.0
 - Serial console: RJ-45 115200 8n1 (1V8 Voltage level)
 - 2 Buttons
 - 1 LED

Known issues:
 - Some devices won't flash via web gui

Installation:
- Newer stock images doesn't allow to install custom firmware.
- Please downgrade software to 1.1.2 version. Official firmware:
https://downloads.linksys.com/downloads/firmware/FW_EA7500_1.1.2.172843_prod.gpg.img
- Do it two times to downgrade all stored images.
- Apply factory image via web-gui.

Serial + TFTP method:
 - downgrade to 1.1.2 two times
 - connect ehternet and serial cable
 - set ip address of tftp server to 192.168.1.254
 - put openwrt factory image to tftp folder and rename it to macan.bin
 - stop device while booting in u-boot
 - run command: "run flashimg"
 - run command: "setenv boot_part 1"
 - run command "saveenv"
 - reset

Back to stock:
- Please use old non-gpg image like this 1.1.2:
https://downloads.linksys.com/downloads/firmware/FW_EA7500_1.1.2.172843_prod.img
- ssh to router and copy image to tmp
- use sysupgrade -n -F

Tested by github users: @jack338c and @grzesiczek1

Signed-off-by: Pawel Dembicki <paweldembicki@gmail.com>
[removed i2c4_pins, mdio0_pins, nand_pins, rgmii2_pins from DTSI]
Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>

1 files changed, 302 insertions, 0 deletions

diff --git a/target/linux/ipq806x/files-5.4/arch/arm/boot/dts/qcom-ipq8064-ea7500-v1.dts b/target/linux/ipq806x/files-5.4/arch/arm/boot/dts/qcom-ipq8064-ea7500-v1.dts
new file mode 100644
index 0000000000..6454fae7f7
--- /dev/null
+++ b/target/linux/ipq806x/files-5.4/arch/arm/boot/dts/qcom-ipq8064-ea7500-v1.dts
@@ -0,0 +1,302 @@
+// SPDX-License-Identifier: GPL-2.0-or-later OR MIT
+#include "qcom-ipq8064-v2.0.dtsi"
+
+#include <dt-bindings/input/input.h>
+
+/ {
+	model = "Linksys EA7500 V1 WiFi Router";
+	compatible = "linksys,ea7500-v1", "qcom,ipq8064";
+
+	memory@0 {
+		reg = <0x42000000 0xe000000>;
+		device_type = "memory";
+	};
+
+	reserved-memory {
+		#address-cells = <1>;
+		#size-cells = <1>;
+		ranges;
+		rsvd@41200000 {
+			reg = <0x41200000 0x300000>;
+			no-map;
+		};
+	};
+
+	aliases {
+		serial0 = &gsbi4_serial;
+
+		led-boot = &led_power;
+		led-failsafe = &led_power;
+		led-running = &led_power;
+		led-upgrade = &led_power;
+	};
+
+	chosen {
+		bootargs = "console=ttyMSM0,115200n8";
+		stdout-path = "serial0:115200n8";
+		append-rootblock = "ubi.mtd=";  /* append to bootargs adding the root deviceblock nbr from bootloader */
+		find-rootblock = "ubi.mtd=";  /* look for root deviceblock nbr in this bootarg */
+	};
+
+	keys {
+		compatible = "gpio-keys";
+		pinctrl-0 = <&button_pins>;
+		pinctrl-names = "default";
+
+		reset {
+			label = "reset";
+			gpios = <&qcom_pinmux 68 GPIO_ACTIVE_LOW>;
+			linux,code = <KEY_RESTART>;
+		};
+
+		wps {
+			label = "wps";
+			gpios = <&qcom_pinmux 65 GPIO_ACTIVE_LOW>;
+			linux,code = <KEY_WPS_BUTTON>;
+		};
+	};
+
+	leds {
+		compatible = "gpio-leds";
+		pinctrl-0 = <&led_pins>;
+		pinctrl-names = "default";
+
+		led_power: power {
+			label = "ea7500-v1:white:power";
+			gpios = <&qcom_pinmux 6 GPIO_ACTIVE_LOW>;
+			default-state = "keep";
+		};
+	};
+};
+
+&qcom_pinmux {
+	button_pins: button_pins {
+		mux {
+			pins = "gpio65", "gpio68";
+			function = "gpio";
+			drive-strength = <2>;
+			bias-pull-up;
+		};
+	};
+
+	led_pins: led_pins {
+		mux {
+			pins = "gpio6";
+			function = "gpio";
+			drive-strength = <2>;
+			bias-pull-up;
+		};
+	};
+};
+
+&gsbi4 {
+	qcom,mode = <GSBI_PROT_I2C_UART>;
+	status = "okay";
+	serial@16340000 {
+		status = "okay";
+	};
+	/*
+	* The i2c device on gsbi4 should not be enabled.
+	* On ipq806x designs gsbi4 i2c is meant for exclusive
+	* RPM usage. Turning this on in kernel manifests as
+	* i2c failure for the RPM.
+	*/
+};
+
+&usb3_0 {
+	status = "okay";
+};
+
+&usb3_1 {
+	status = "okay";
+};
+
+&pcie0 {
+	status = "okay";
+	force_gen1 = <1>;
+};
+
+&pcie1 {
+	status = "okay";
+};
+
+&pcie2 {
+	status = "okay";
+};
+
+&nand_controller {
+	status = "okay";
+
+	pinctrl-0 = <&nand_pins>;
+	pinctrl-names = "default";
+
+	nand@0 {
+		reg = <0>;
+		compatible = "qcom,nandcs";
+
+		nand-ecc-strength = <4>;
+		nand-bus-width = <8>;
+		nand-ecc-step-size = <512>;
+
+		partitions {
+			compatible = "fixed-partitions";
+			#address-cells = <1>;
+			#size-cells = <1>;
+
+			partition@0 {
+				label = "SBL1";
+				reg = <0x0000000 0x0040000>;
+				read-only;
+			};
+
+			partition@40000 {
+				label = "MIBIB";
+				reg = <0x0040000 0x0140000>;
+				read-only;
+			};
+
+			partition@180000 {
+				label = "SBL2";
+				reg = <0x0180000 0x0140000>;
+				read-only;
+			};
+
+			partition@2c0000 {
+				label = "SBL3";
+				reg = <0x02c0000 0x0280000>;
+				read-only;
+			};
+
+			partition@540000 {
+				label = "DDRCONFIG";
+				reg = <0x0540000 0x0120000>;
+				read-only;
+			};
+
+			partition@660000 {
+				label = "SSD";
+				reg = <0x0660000 0x0120000>;
+				read-only;
+			};
+
+			partition@780000 {
+				label = "TZ";
+				reg = <0x0780000 0x0280000>;
+				read-only;
+			};
+
+			partition@a00000 {
+				label = "RPM";
+				reg = <0x0a00000 0x0280000>;
+				read-only;
+			};
+
+			art: partition@c80000 {
+				label = "art";
+				reg = <0x0c80000 0x0140000>;
+				read-only;
+			};
+
+			partition@dc0000 {
+				label = "APPSBL";
+				reg = <0x0dc0000 0x0100000>;
+				read-only;
+			};
+
+			partition@ec0000 {
+				label = "u_env";
+				reg = <0x0ec0000 0x0040000>;
+			};
+
+			partition@f00000 {
+				label = "s_env";
+				reg = <0x0f00000 0x0040000>;
+			};
+
+			partition@f40000 {
+				label = "devinfo";
+				reg = <0x0f40000 0x0040000>;
+			};
+
+			partition@f80000 {
+				label = "kernel1";
+				reg = <0x0f80000 0x2800000>;  /* 3 MB spill to rootfs*/
+			};
+
+			partition@1280000 {
+				label = "rootfs1";
+				reg = <0x1280000 0x2500000>;
+			};
+
+			partition@3780000 {
+				label = "kernel2";
+				reg = <0x3780000 0x2800000>;
+			};
+
+			partition@3a80000 {
+				label = "rootfs2";
+				reg = <0x3a80000 0x2500000>;
+			};
+
+			partition@5f80000 {
+				label = "sysdiag";
+				reg = <0x5f80000 0x100000>;
+			};
+
+			partition@6080000 {
+				label = "syscfg";
+				reg = <0x6080000 0x1f80000>;
+			};
+		};
+	};
+};
+
+&mdio0 {
+	status = "okay";
+
+	pinctrl-0 = <&mdio0_pins>;
+	pinctrl-names = "default";
+
+	phy0: ethernet-phy@0 {
+		reg = <0>;
+		qca,ar8327-initvals = <
+			0x00004 0x7600000   /* PAD0_MODE */
+			0x00008 0x1000000   /* PAD5_MODE */
+			0x0000c 0x80        /* PAD6_MODE */
+			0x00010 0x2613a0    /* PWS_REG */
+			0x000e4 0x6a545     /* MAC_POWER_SEL */
+			0x000e0 0xc74164de  /* SGMII_CTRL */
+			0x0007c 0x4e        /* PORT0_STATUS */
+			0x00094 0x4e        /* PORT6_STATUS */
+			>;
+	};
+};
+
+&gmac1 {
+	status = "okay";
+	phy-mode = "rgmii";
+	qcom,id = <1>;
+
+	pinctrl-0 = <&rgmii2_pins>;
+	pinctrl-names = "default";
+
+	fixed-link {
+		speed = <1000>;
+		full-duplex;
+	};
+};
+
+&gmac2 {
+	status = "okay";
+	phy-mode = "sgmii";
+	qcom,id = <2>;
+
+	fixed-link {
+		speed = <1000>;
+		full-duplex;
+	};
+};
+
+&adm_dma {
+	status = "okay";
+};