ipq40xx: Add support for Linksys MR8300 (Dallas)

The Linksys MR8300 is based on QCA4019 and QCA9888
and provides three, independent radios.
NAND provides two, alternate kernel/firmware images
with fail-over provided by the OEM U-Boot.

Hardware Highlights:

SoC: IPQ4019 at 717 MHz (4 CPUs)
RAM: 512MB RAM

SoC:	Qualcomm IPQ4019 at 717 MHz (4 CPUs)
RAM:	512M DDR3
FLASH:	256 MB NAND (Winbond W29N02GV, 8-bit parallel)
ETH:	Qualcomm QCA8075 (4x GigE LAN, 1x GigE Internet Ethernet Jacks)
BTN:	Reset and WPS
USB:	USB3.0, single port on rear with LED
SERIAL:	Serial pads internal (unpopulated)
LED:	Four status lights on top + USB LED
WIFI1:	2x2:2 QCA4019 2.4 GHz radio on ch. 1-14
WIFI2:  2x2:2 QCA4019 5 GHz radio on ch. 36-64
WIFI3:  2x2:2 QCA9888 5 GHz radio on ch. 100-165

Support is based on the already supported EA8300.
Key differences:
	EA8300 has 256MB RAM where MR8300 has 512MB RAM.
	MR8300 has a revised top panel LED setup.

Installation:
"Factory" images may be installed directly through the OEM GUI using
URL: https://ip-of-router/fwupdate.html (Typically 192.168.1.1)

Signed-off-by: Hans Geiblinger <cybrnook2002@yahoo.com>
[copied Hardware-highlights from EA8300. Fixed alphabetical order.
fixed commit subject, removed bogus unit-address of keys,
fixed author (used Signed-off-By to From:) ]
Signed-off-by: Christian Lamparter <chunkeey@gmail.com>

3 files changed, 387 insertions, 305 deletions

diff --git a/target/linux/ipq40xx/files/arch/arm/boot/dts/qcom-ipq4019-ea8300.dts b/target/linux/ipq40xx/files/arch/arm/boot/dts/qcom-ipq4019-ea8300.dts
index cfc3037fb2..9c1e0f04bb 100644
--- a/target/linux/ipq40xx/files/arch/arm/boot/dts/qcom-ipq4019-ea8300.dts
+++ b/target/linux/ipq40xx/files/arch/arm/boot/dts/qcom-ipq4019-ea8300.dts
@@ -1,18 +1,8 @@
 // SPDX-License-Identifier: GPL-2.0-or-later OR MIT
 
-/*
- * Device Tree Source for Linksys EA8300 (Dallas)
- *
- * Copyright (C) 2019 Jeff Kletsky
- *
- */
-
 /dts-v1/;
 
-#include "qcom-ipq4019.dtsi"
-#include <dt-bindings/gpio/gpio.h>
-#include <dt-bindings/input/input.h>
-#include <dt-bindings/soc/qcom,tcsr.h>
+#include "qcom-ipq4019-xx8300.dtsi"
 
 / {
 	model = "Linksys EA8300 (Dallas)";
@@ -72,313 +62,21 @@
 		};
 	};
 
-
 	keys {
 		compatible = "gpio-keys";
 
-		button@0 {
+		reset {
 			label = "reset";
 			linux,code = <KEY_RESTART>;
 			gpios = <&tlmm 50 GPIO_ACTIVE_LOW>;
 		};
 
-		button@1 {
+		wps {
 			label = "wps";
 			linux,code = <KEY_WPS_BUTTON>;
 			gpios = <&tlmm 18 GPIO_ACTIVE_LOW>;
 		};
 	};
-
-
-	//
-	// OEM U-Boot provides either
-	// init=/sbin/init rootfstype=ubifs ubi.mtd=11,2048 \
-	//                 root=ubi0:ubifs rootwait rw
-	// or the same with ubi.mtd=13,2048
-	//
-
-	chosen {
-		bootargs-append = " root=/dev/ubiblock0_0 rootfstype=squashfs ro";
-	};
-
-
-	memory {
-		device_type = "memory";
-		reg = <0x80000000 0x10000000>;
-	};
-
-
-	soc {
-		rng@22000 {
-			status = "okay";
-		};
-
-		mdio@90000 {
-			status = "okay";
-		};
-
-		ess-psgmii@98000 {
-			status = "okay";
-		};
-
-		tcsr@1949000 {
-			compatible = "qcom,tcsr";
-			reg = <0x1949000 0x100>;
-			qcom,wifi_glb_cfg = <TCSR_WIFI_GLB_CFG>;
-		};
-
-		tcsr@194b000 {
-			compatible = "qcom,tcsr";
-			reg = <0x194b000 0x100>;
-			qcom,usb-hsphy-mode-select = <TCSR_USB_HSPHY_HOST_MODE>;
-		};
-
-		ess_tcsr@1953000 {
-			compatible = "qcom,tcsr";
-			reg = <0x1953000 0x1000>;
-			qcom,ess-interface-select = <TCSR_ESS_PSGMII>;
-		};
-
-		tcsr@1957000 {
-			compatible = "qcom,tcsr";
-			reg = <0x1957000 0x100>;
-			qcom,wifi_noc_memtype_m0_m2 = <TCSR_WIFI_NOC_MEMTYPE_M0_M2>;
-		};
-
-		usb2@60f8800 {
-			status = "okay";
-
-			dwc3@6000000 {
-				#address-cells = <1>;
-				#size-cells = <0>;
-
-				usb2_port1: port@1 {
-					reg = <1>;
-					#trigger-source-cells = <0>;
-				};
-			};
-		};
-
-		usb3@8af8800 {
-			status = "okay";
-
-			dwc3@8a00000 {
-				#address-cells = <1>;
-				#size-cells = <0>;
-
-				usb3_port1: port@1 {
-					reg = <1>;
-					#trigger-source-cells = <0>;
-				};
-
-				usb3_port2: port@2 {
-					reg = <2>;
-					#trigger-source-cells = <0>;
-				};
-			};
-		};
-
-		crypto@8e3a000 {
-			status = "okay";
-		};
-
-		watchdog@b017000 {
-			status = "okay";
-		};
-
-		ess-switch@c000000 {
-			status = "okay";
-		};
-
-		edma@c080000 {
-			status = "okay";
-		};
-	};
-};
-
-
-&blsp_dma {
-	status = "okay";
-};
-
-&blsp1_uart1 {
-	status = "okay";
-	pinctrl-0 = <&serial_0_pins>;
-	pinctrl-names = "default";
-
-};
-
-&cryptobam {
-	status = "okay";
-};
-
-&nand {
-	status = "okay";
-
-	pinctrl-0 = <&nand_pins>;
-	pinctrl-names = "default";
-
-	nand@0 {
-		partitions {
-			compatible = "fixed-partitions";
-			#address-cells = <1>;
-			#size-cells = <1>;
-
-			partition@0 {
-				label = "sbl1";
-				reg = <0x0 0x100000>;
-				read-only;
-			};
-
-			partition@100000 {
-				label = "mibib";
-				reg = <0x100000 0x100000>;
-				read-only;
-			};
-
-			partition@200000 {
-				label = "qsee";
-				reg = <0x200000 0x100000>;
-				read-only;
-			};
-
-			partition@300000 {
-				label = "cdt";
-				reg = <0x300000 0x80000>;
-				read-only;
-			};
-
-			partition@380000 {
-				label = "appsblenv";
-				reg = <0x380000 0x80000>;
-				read-only;
-			};
-
-			partition@400000 {
-				label = "ART";
-				reg = <0x400000 0x80000>;
-				read-only;
-			};
-
-			partition@480000 {
-				label = "appsbl";
-				reg = <0x480000 0x200000>;
-				read-only;
-			};
-
-			partition@680000 {
-				label = "u_env";
-				reg = <0x680000 0x80000>;
-				// writable -- U-Boot environment
-			};
-
-			partition@700000 {
-				label = "s_env";
-				reg = <0x700000 0x40000>;
-				// writable -- Boot counter records
-			};
-
-			partition@740000 {
-				label = "devinfo";
-				reg = <0x740000 0x40000>;
-				read-only;
-			};
-
-			partition@780000 {
-				label = "kernel";
-				reg = <0x780000 0x5800000>;
-			};
-
-			partition@a80000 {
-				label = "rootfs";
-				reg = <0xa80000 0x5500000>;
-			};
-
-			partition@5f80000 {
-				label = "alt_kernel";
-				reg = <0x5f80000 0x5800000>;
-			};
-
-			partition@6280000 {
-				label = "alt_rootfs";
-				reg = <0x6280000 0x5500000>;
-			};
-
-			partition@b780000 {
-				label = "sysdiag";
-				reg = <0xb780000 0x100000>;
-				read-only;
-			};
-
-			partition@b880000 {
-				label = "syscfg";
-				reg = <0xb880000 0x4680000>;
-				read-only;
-			};
-		};
-	};
-};
-
-&pcie0 {
-	status = "okay";
-
-	perst-gpio = <&tlmm 38 GPIO_ACTIVE_LOW>;
-	wake-gpio = <&tlmm 50 GPIO_ACTIVE_LOW>;
-
-	bridge@0,0 {
-		reg = <0x00000000 0 0 0 0>;
-		#address-cells = <3>;
-		#size-cells = <2>;
-		ranges;
-
-		wifi2: wifi@1,0 {
-			compatible = "qcom,ath10k";
-			reg = <0x00010000 0 0 0 0>;
-		};
-	};
-};
-
-&qpic_bam {
-	status = "okay";
-};
-
-&tlmm {
-	serial_0_pins: serial0-pinmux {
-		pins = "gpio16", "gpio17";
-		function = "blsp_uart0";
-		bias-disable;
-	};
-
-	nand_pins: nand_pins {
-		pullups {
-			pins = "gpio53", "gpio58", "gpio59";
-			function = "qpic";
-			bias-pull-up;
-		};
-
-		// gpio61 controls led_usb
-
-		pulldowns {
-			pins =  "gpio55", "gpio56", "gpio57",
-				"gpio60", "gpio62", "gpio63",
-				"gpio64", "gpio65", "gpio66",
-				"gpio67", "gpio68", "gpio69";
-			function = "qpic";
-			bias-pull-down;
-		};
-	};
-};
-
-&usb2_hs_phy {
-	status = "okay";
-};
-
-&usb3_hs_phy {
-	status = "okay";
-};
-
-&usb3_ss_phy {
-	status = "okay";
 };
 
 &wifi0 {
diff --git a/target/linux/ipq40xx/files/arch/arm/boot/dts/qcom-ipq4019-mr8300.dts b/target/linux/ipq40xx/files/arch/arm/boot/dts/qcom-ipq4019-mr8300.dts
new file mode 100644
index 0000000000..4818a2df59
--- /dev/null
+++ b/target/linux/ipq40xx/files/arch/arm/boot/dts/qcom-ipq4019-mr8300.dts
@@ -0,0 +1,82 @@
+// SPDX-License-Identifier: GPL-2.0-or-later OR MIT
+
+/dts-v1/;
+
+#include "qcom-ipq4019-xx8300.dtsi"
+
+/ {
+	model = "Linksys MR8300 (Dallas)";
+	compatible = "linksys,mr8300", "qcom,ipq4019";
+
+	aliases {
+		led-boot = &led_blue;
+		led-failsafe = &led_red;
+		led-running = &led_blue;
+		led-upgrade = &led_amber;
+		serial0 = &blsp1_uart1;
+	};
+
+	// Top panel LEDs, above Linksys logo
+	leds {
+		compatible = "gpio-leds";
+
+		led_red: red {
+			label = "mr8300:red:alarm";
+			gpios = <&tlmm 47 GPIO_ACTIVE_HIGH>;
+		};
+
+		led_amber: amber {
+			label = "mr8300:amber:programming";
+			gpios = <&tlmm 22 GPIO_ACTIVE_HIGH>;
+			panic-indicator;
+		};
+
+		led_blue: blue {
+			label = "mr8300:blue:power";
+			gpios = <&tlmm 46 GPIO_ACTIVE_HIGH>;
+		};
+
+		// On back panel, above USB socket
+
+		led_usb: usb {
+			label = "mr8300:green:usb";
+			gpios = <&tlmm 61 GPIO_ACTIVE_LOW>;
+			trigger-sources = <&usb3_port1>, <&usb3_port2>,
+					  <&usb2_port1>;
+			linux,default-trigger = "usbport";
+		};
+	};
+
+	keys {
+		compatible = "gpio-keys";
+
+		reset {
+			label = "reset";
+			linux,code = <KEY_RESTART>;
+			gpios = <&tlmm 50 GPIO_ACTIVE_LOW>;
+		};
+
+		wps {
+			label = "wps";
+			linux,code = <KEY_WPS_BUTTON>;
+			gpios = <&tlmm 18 GPIO_ACTIVE_LOW>;
+		};
+	};
+};
+
+&wifi0 {
+	status = "okay";
+	qcom,ath10k-calibration-variant = "linksys-mr8300-v0-fcc";
+};
+
+&wifi1 {
+	status = "okay";
+	ieee80211-freq-limit = <5170000 5330000>;
+	qcom,ath10k-calibration-variant = "linksys-mr8300-v0-fcc";
+};
+
+&wifi2 {
+	status = "okay";
+	ieee80211-freq-limit = <5490000 5835000>;
+	qcom,ath10k-calibration-variant = "linksys-mr8300-v0-fcc";
+};
diff --git a/target/linux/ipq40xx/files/arch/arm/boot/dts/qcom-ipq4019-xx8300.dtsi b/target/linux/ipq40xx/files/arch/arm/boot/dts/qcom-ipq4019-xx8300.dtsi
new file mode 100644
index 0000000000..77d495e670
--- /dev/null
+++ b/target/linux/ipq40xx/files/arch/arm/boot/dts/qcom-ipq4019-xx8300.dtsi
@@ -0,0 +1,302 @@
+// SPDX-License-Identifier: GPL-2.0-or-later OR MIT
+
+/*
+ * Device Tree Source for Linksys xx8300 (Dallas)
+ *
+ * Copyright (C) 2019 Jeff Kletsky
+ * Updated 2020 Hans Geiblinger
+ *
+ */
+
+/dts-v1/;
+
+#include "qcom-ipq4019.dtsi"
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/input/input.h>
+#include <dt-bindings/soc/qcom,tcsr.h>
+
+	//
+	// OEM U-Boot provides either
+	// init=/sbin/init rootfstype=ubifs ubi.mtd=11,2048 \
+	//                 root=ubi0:ubifs rootwait rw
+	// or the same with ubi.mtd=13,2048
+	//
+
+/ {
+	chosen {
+		bootargs-append = " root=/dev/ubiblock0_0 rootfstype=squashfs ro";
+	};
+
+
+	soc {
+		rng@22000 {
+			status = "okay";
+		};
+
+		mdio@90000 {
+			status = "okay";
+		};
+
+		ess-psgmii@98000 {
+			status = "okay";
+		};
+
+		tcsr@1949000 {
+			compatible = "qcom,tcsr";
+			reg = <0x1949000 0x100>;
+			qcom,wifi_glb_cfg = <TCSR_WIFI_GLB_CFG>;
+		};
+
+		tcsr@194b000 {
+			compatible = "qcom,tcsr";
+			reg = <0x194b000 0x100>;
+			qcom,usb-hsphy-mode-select = <TCSR_USB_HSPHY_HOST_MODE>;
+		};
+
+		ess_tcsr@1953000 {
+			compatible = "qcom,tcsr";
+			reg = <0x1953000 0x1000>;
+			qcom,ess-interface-select = <TCSR_ESS_PSGMII>;
+		};
+
+		tcsr@1957000 {
+			compatible = "qcom,tcsr";
+			reg = <0x1957000 0x100>;
+			qcom,wifi_noc_memtype_m0_m2 = <TCSR_WIFI_NOC_MEMTYPE_M0_M2>;
+		};
+
+		usb2@60f8800 {
+			status = "okay";
+
+			dwc3@6000000 {
+				#address-cells = <1>;
+				#size-cells = <0>;
+
+				usb2_port1: port@1 {
+					reg = <1>;
+					#trigger-source-cells = <0>;
+				};
+			};
+		};
+
+		usb3@8af8800 {
+			status = "okay";
+
+			dwc3@8a00000 {
+				#address-cells = <1>;
+				#size-cells = <0>;
+
+				usb3_port1: port@1 {
+					reg = <1>;
+					#trigger-source-cells = <0>;
+				};
+
+				usb3_port2: port@2 {
+					reg = <2>;
+					#trigger-source-cells = <0>;
+				};
+			};
+		};
+
+		crypto@8e3a000 {
+			status = "okay";
+		};
+
+		watchdog@b017000 {
+			status = "okay";
+		};
+
+		ess-switch@c000000 {
+			status = "okay";
+		};
+
+		edma@c080000 {
+			status = "okay";
+		};
+	};
+};
+
+
+&blsp_dma {
+	status = "okay";
+};
+
+&blsp1_uart1 {
+	status = "okay";
+	pinctrl-0 = <&serial_0_pins>;
+	pinctrl-names = "default";
+
+};
+
+&cryptobam {
+	status = "okay";
+};
+
+&nand {
+	status = "okay";
+
+	pinctrl-0 = <&nand_pins>;
+	pinctrl-names = "default";
+
+	nand@0 {
+		partitions {
+			compatible = "fixed-partitions";
+			#address-cells = <1>;
+			#size-cells = <1>;
+
+			partition@0 {
+				label = "sbl1";
+				reg = <0x0 0x100000>;
+				read-only;
+			};
+
+			partition@100000 {
+				label = "mibib";
+				reg = <0x100000 0x100000>;
+				read-only;
+			};
+
+			partition@200000 {
+				label = "qsee";
+				reg = <0x200000 0x100000>;
+				read-only;
+			};
+
+			partition@300000 {
+				label = "cdt";
+				reg = <0x300000 0x80000>;
+				read-only;
+			};
+
+			partition@380000 {
+				label = "appsblenv";
+				reg = <0x380000 0x80000>;
+				read-only;
+			};
+
+			partition@400000 {
+				label = "ART";
+				reg = <0x400000 0x80000>;
+				read-only;
+			};
+
+			partition@480000 {
+				label = "appsbl";
+				reg = <0x480000 0x200000>;
+				read-only;
+			};
+
+			partition@680000 {
+				label = "u_env";
+				reg = <0x680000 0x80000>;
+				// writable -- U-Boot environment
+			};
+
+			partition@700000 {
+				label = "s_env";
+				reg = <0x700000 0x40000>;
+				// writable -- Boot counter records
+			};
+
+			partition@740000 {
+				label = "devinfo";
+				reg = <0x740000 0x40000>;
+				read-only;
+			};
+
+			partition@780000 {
+				label = "kernel";
+				reg = <0x780000 0x5800000>;
+			};
+
+			partition@a80000 {
+				label = "rootfs";
+				reg = <0xa80000 0x5500000>;
+			};
+
+			partition@5f80000 {
+				label = "alt_kernel";
+				reg = <0x5f80000 0x5800000>;
+			};
+
+			partition@6280000 {
+				label = "alt_rootfs";
+				reg = <0x6280000 0x5500000>;
+			};
+
+			partition@b780000 {
+				label = "sysdiag";
+				reg = <0xb780000 0x100000>;
+				read-only;
+			};
+
+			partition@b880000 {
+				label = "syscfg";
+				reg = <0xb880000 0x4680000>;
+				read-only;
+			};
+		};
+	};
+};
+
+&pcie0 {
+	status = "okay";
+
+	perst-gpio = <&tlmm 38 GPIO_ACTIVE_LOW>;
+	wake-gpio = <&tlmm 50 GPIO_ACTIVE_LOW>;
+
+	bridge@0,0 {
+		reg = <0x00000000 0 0 0 0>;
+		#address-cells = <3>;
+		#size-cells = <2>;
+		ranges;
+
+		wifi2: wifi@1,0 {
+			compatible = "qcom,ath10k";
+			reg = <0x00010000 0 0 0 0>;
+		};
+	};
+};
+
+&qpic_bam {
+	status = "okay";
+};
+
+&tlmm {
+	serial_0_pins: serial0-pinmux {
+		pins = "gpio16", "gpio17";
+		function = "blsp_uart0";
+		bias-disable;
+	};
+
+	nand_pins: nand_pins {
+		pullups {
+			pins = "gpio53", "gpio58", "gpio59";
+			function = "qpic";
+			bias-pull-up;
+		};
+
+		// gpio61 controls led_usb
+
+		pulldowns {
+			pins =  "gpio55", "gpio56", "gpio57",
+				"gpio60", "gpio62", "gpio63",
+				"gpio64", "gpio65", "gpio66",
+				"gpio67", "gpio68", "gpio69";
+			function = "qpic";
+			bias-pull-down;
+		};
+	};
+};
+
+&usb2_hs_phy {
+	status = "okay";
+};
+
+&usb3_hs_phy {
+	status = "okay";
+};
+
+&usb3_ss_phy {
+	status = "okay";
+};