ipq40xx: add support for Linksys WHW01 v1

This patch adds support for Linksys WHW01 v1 ("Velop") [FCC ID Q87-03331].

Specification
-------------

SOC:             Qualcomm IPQ4018
WiFi 1:          Qualcomm QCA4019 IEEE 802.11b/g/n
WiFi 2:          Qualcomm QCA4019 IEEE 802.11a/n/ac
Bluetooth:       Qualcomm CSR8811 (A12U)
Ethernet:        Qualcomm QCA8072 (2-port)
SPI Flash 1:     Mactronix MX25L1605D (2MB)
SPI Flash 2:     Winbond W25M02GV (256MB)
DRAM:            Nanya NT5CC128M16IP-DI (256MB)
LED Controller:  NXP PCA963x (I2C)
Buttons:         Single reset button (GPIO).

Notes
-----

There does not appear to be a way to trigger TFTP recovery without entering
U-Boot. The device must be opened to access the serial console in order to
first flash OpenWrt onto a device from factory.

The device has automatic recovery backed by a second set of partitions on
the larger of the two SPI flash ICs. Both the primary and secondary must
be flashed to prevent accidental rollback to "factory" after 3 failed boot
attempts.

Serial console
--------------

A serial console is available on the following pins of the populated J2
connector on the device mainboard (115200 8n1).

(<-- Top of PCB / Device)

  J2
  [o o o o o o]
       |   | |
       |   |  `-- GND
       |    `---- TX
       `--------- RX

Installation instructions
-------------------------

1. Setup TFTP server with server IP set to 192.168.1.236.
2. Copy compiled `...squashfs-factory.bin` to `nodes-jr.img` in tftp root.
3. Connect to console using pinout detailed in the serial console section.
4. Power on device and press enter when prompted to drop into U-Boot.
5. Flash first partition device via `run flashimg`.
6. Once complete, reset device and allow to power up completely.
7. Once comfortable with device upgrade reboot and drop back into U-Boot.
8. Flash the second partition (recovery) via `run flashimg2`.

Revert to "factory"
-------------------

1. Download latest firmware update from vendor support site.
2. Copy extracted `.img` file to `nodes-jr.img` in tftp root.
3. Connect to console using pinout detailed in the serial console section.
4. Power on device and press enter when prompted to drop into U-Boot.
5. Flash first partition device via `run flashimg`.
6. Once complete, reset device and allow to power up completely.
7. Once comfortable with device upgrade reboot and drop back into U-Boot.
8. Flash the second partition (recovery) via `run flashimg2`.

Link: https://github.com/openwrt/openwrt/pull/3682
Signed-off-by: Peter Adkins <peter@sunkenlab.com>
(calibration from nvmem, updated to 5.10+5.15)
Signed-off-by: Christian Lamparter <chunkeey@gmail.com>

1 files changed, 330 insertions, 0 deletions

diff --git a/target/linux/ipq40xx/files/arch/arm/boot/dts/qcom-ipq4018-whw01-v1.dts b/target/linux/ipq40xx/files/arch/arm/boot/dts/qcom-ipq4018-whw01-v1.dts
new file mode 100644
index 0000000000..6f244132ea
--- /dev/null
+++ b/target/linux/ipq40xx/files/arch/arm/boot/dts/qcom-ipq4018-whw01-v1.dts
@@ -0,0 +1,330 @@
+// SPDX-License-Identifier: GPL-2.0-or-later OR MIT
+
+#include "qcom-ipq4019.dtsi"
+#include <dt-bindings/leds/common.h>
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/input/input.h>
+
+/ {
+	model = "Linksys WHW01 v1";
+	compatible = "linksys,whw01-v1";
+
+	aliases {
+		serial0 = &blsp1_uart1;
+		led-boot = &led_system_blue;
+		led-running = &led_system_blue;
+	};
+
+	chosen {
+		stdout-path = "serial0:115200n8";
+		bootargs-append = " root=/dev/ubiblock0_0";
+	};
+
+	soc {
+		keys {
+			compatible = "gpio-keys";
+
+			reset {
+				label = "reset";
+				gpios = <&tlmm 63 GPIO_ACTIVE_LOW>;
+				linux,code = <KEY_RESTART>;
+			};
+		};
+
+		ess-psgmii@98000 {
+			status = "okay";
+		};
+
+		ess_tcsr@1953000 {
+			status = "okay";
+		};
+
+		ess-switch@c000000 {
+			status = "okay";
+		};
+
+		edma@c080000 {
+			status = "okay";
+		};
+	};
+};
+
+&blsp_dma {
+	status = "okay";
+};
+
+&blsp1_i2c3 {
+	status = "okay";
+	pinctrl-0 = <&i2c_0_pins>;
+	pinctrl-1 = <&i2c_0_pins>;
+	pinctrl-names = "i2c_active", "i2c_sleep";
+
+	leds@62 {
+		compatible = "nxp,pca9633";
+		#address-cells = <1>;
+		#size-cells = <0>;
+		reg = <0x62>;
+
+		/* RGB? */
+		led@0 {
+			reg = <0>;
+			color = <LED_COLOR_ID_RED>;
+			function = LED_FUNCTION_POWER;
+		};
+
+		led@1 {
+			reg = <1>;
+			color = <LED_COLOR_ID_GREEN>;
+			function = LED_FUNCTION_POWER;
+		};
+
+		led_system_blue: led@2 {
+			reg = <2>;
+			color = <LED_COLOR_ID_BLUE>;
+			function = LED_FUNCTION_POWER;
+			linux,default-trigger = "default-on";
+		};
+	};
+};
+
+&blsp1_spi1 {
+	status = "okay";
+	pinctrl-0 = <&spi_0_pins>;
+	pinctrl-names = "default";
+	cs-gpios = <&tlmm 54 GPIO_ACTIVE_HIGH>, <&tlmm 4 GPIO_ACTIVE_HIGH>;
+
+	nor@0 {
+		reg = <0>;
+		compatible = "jedec,spi-nor";
+		spi-max-frequency = <24000000>;
+
+		partitions {
+			compatible = "fixed-partitions";
+			#address-cells = <1>;
+			#size-cells = <1>;
+
+			partition@0 {
+				label = "0:SBL1";
+				reg = <0x0 0x40000>;
+				read-only;
+			};
+
+			partition@40000 {
+				label = "0:MIBIB";
+				reg = <0x40000 0x20000>;
+				read-only;
+			};
+
+			partition@60000 {
+				label = "0:QSEE";
+				reg = <0x60000 0x60000>;
+				read-only;
+			};
+
+			partition@c0000 {
+				label = "0:CDT";
+				reg = <0xc0000 0x10000>;
+				read-only;
+			};
+
+			partition@d0000 {
+				label = "APPSBL";
+				reg = <0xd0000 0xa0000>;
+				read-only;
+			};
+
+			partition@170000 {
+				label = "0:ART";
+				reg = <0x170000 0x10000>;
+				read-only;
+
+				compatible = "nvmem-cells";
+				#address-cells = <1>;
+				#size-cells = <1>;
+
+				precal_art_1000: precal@1000 {
+					reg = <0x1000 0x2f20>;
+				};
+
+				precal_art_5000: precal@5000 {
+					reg = <0x5000 0x2f20>;
+				};
+			};
+
+			partition@180000 {
+				label = "u_env";
+				reg = <0x180000 0x40000>;
+			};
+
+			partition@1c0000 {
+				label = "s_env";
+				reg = <0x1c0000 0x20000>;
+			};
+
+			partition@1e0000 {
+				label = "devinfo";
+				reg = <0x1e0000 0x20000>;
+				read-only;
+			};
+		};
+	};
+
+	nand@1 {
+		reg = <1>;
+		compatible = "spi-nand";
+		spi-max-frequency = <24000000>;
+
+		partitions {
+			compatible = "fixed-partitions";
+			#address-cells = <1>;
+			#size-cells = <1>;
+
+			partition@0 {
+				label = "kernel";
+				reg = <0x0000000 0x5000000>;
+			};
+
+			partition@600000 {
+				label = "rootfs";
+				reg = <0x0600000 0x4a00000>;
+			};
+
+			partition@5000000 {
+				label = "alt_kernel";
+				reg = <0x5000000 0x5000000>;
+			};
+
+			partition@5600000 {
+				label = "alt_rootfs";
+				reg = <0x5600000 0x4a00000>;
+			};
+
+			partition@a000000 {
+				label = "sysdiag";
+				reg = <0xa000000 0x0200000>;
+				read-only;
+			};
+
+			partition@a200000 {
+				label = "syscfg";
+				reg = <0xa200000 0x5e00000>;
+				read-only;
+			};
+		};
+	};
+};
+
+&blsp1_uart1 {
+	pinctrl-0 = <&serial_pins>;
+	pinctrl-names = "default";
+	status = "okay";
+};
+
+&mdio {
+	status = "okay";
+	pinctrl-0 = <&mdio_pins>;
+	pinctrl-names = "default";
+	phy-reset-gpio = <&tlmm 62 GPIO_ACTIVE_HIGH>;
+};
+
+&tlmm {
+	mdio_pins: mdio_pinmux {
+		mux_mdio {
+			pins = "gpio53";
+			function = "mdio";
+			bias-pull-up;
+		};
+
+		mux_mdc {
+			pins = "gpio52";
+			function = "mdc";
+			bias-pull-up;
+		};
+	};
+
+	serial_pins: serial_pinmux {
+		mux {
+			pins = "gpio60", "gpio61";
+			function = "blsp_uart0";
+			bias-disable;
+		};
+	};
+
+	spi_0_pins: spi_0_pinmux {
+		pinmux {
+			function = "blsp_spi0";
+			pins = "gpio55", "gpio56", "gpio57";
+		};
+
+		pinmux_cs {
+			function = "gpio";
+			pins = "gpio54", "gpio4";
+		};
+
+		pinconf {
+			pins = "gpio55", "gpio56", "gpio57";
+			drive-strength = <12>;
+			bias-disable;
+		};
+
+		pinconf_cs {
+			pins = "gpio54", "gpio4";
+			drive-strength = <2>;
+			bias-disable;
+			output-high;
+		};
+	};
+
+	i2c_0_pins: i2c_0_pinmux {
+		mux {
+			function = "blsp_i2c0";
+			pins = "gpio58", "gpio59";
+			bias-disable;
+		};
+	};
+
+	reset_pinmux {
+		mux {
+			pins = "gpio63";
+			bias-pull-up;
+		};
+	};
+};
+
+&usb2 {
+	status = "okay";
+};
+
+&usb2_hs_phy {
+	status = "okay";
+};
+
+&usb3 {
+	status = "okay";
+};
+
+&usb3_hs_phy {
+	status = "okay";
+};
+
+&usb3_ss_phy {
+	status = "okay";
+};
+
+&watchdog {
+	status = "okay";
+};
+
+&wifi0 {
+	status = "okay";
+	qcom,ath10k-calibration-variant = "linksys-whw01-v1";
+	nvmem-cell-names = "pre-calibration";
+	nvmem-cells = <&precal_art_1000>;
+};
+
+&wifi1 {
+	status = "okay";
+	qcom,ath10k-calibration-variant = "linksys-whw01-v1";
+	nvmem-cell-names = "pre-calibration";
+	nvmem-cells = <&precal_art_5000>;
+};