src/arm/intel-ixp42x-goramo-multilink.dts

// SPDX-License-Identifier: ISC
/*
 * Device Tree file for the Goramo MultiLink Router
 * There are two variants:
 * - MultiLink Basic (a box)
 * - MultiLink Max (19" rack mount)
 * This device tree supports MultiLink Basic.
 * This machine is based on IXP425.
 * This is one of the few devices supporting the IXP4xx High-Speed Serial
 * (HSS) link for a V.35 WAN interface.
 * The hardware originates in Poland.
 */

/dts-v1/;

#include "intel-ixp42x.dtsi"
#include <dt-bindings/input/input.h>

/ {
	model = "Goramo MultiLink Router";
	compatible = "goramo,multilink-router", "intel,ixp42x";
	#address-cells = <1>;
	#size-cells = <1>;

	memory@0 {
		/*
		 * 64 MB of RAM according to the manual. The MultiLink
		 * Max has 128 MB.
		 */
		device_type = "memory";
		reg = <0x00000000 0x4000000>;
	};

	chosen {
		bootargs = "console=ttyS0,115200n8";
		stdout-path = "uart0:115200n8";
	};

	aliases {
		serial0 = &uart0;
		serial1 = &uart1;
	};

	/*
	 * 74HC4094 which is used as a rudimentary GPIO expander
	 * FIXME:
	 * - Create device tree bindings for this as GPIO expander
	 * - Write a pure DT GPIO driver using these bindings
	 * - Support cascading in the style of gpio-74x164.c (cannot be reused, very different)
	 */
	gpio_74: gpio-74hc4094 {
		compatible = "nxp,74hc4094";
		cp-gpios = <&gpio0 0 GPIO_ACTIVE_HIGH>;
		d-gpios = <&gpio0 1 GPIO_ACTIVE_HIGH>;
		str-gpios = <&gpio0 2 GPIO_ACTIVE_HIGH>;
		/* oe-gpios is optional */
		gpio-controller;
		#gpio-cells = <2>;
		/* We are not cascaded */
		registers-number = <1>;
		gpio-line-names = "CONTROL_HSS0_CLK_INT", "CONTROL_HSS1_CLK_INT", "CONTROL_HSS0_DTR_N",
				"CONTROL_HSS1_DTR_N", "CONTROL_EXT", "CONTROL_AUTO_RESET",
				"CONTROL_PCI_RESET_N", "CONTROL_EEPROM_WC_N";
	};

	soc {
		bus@c4000000 {
			flash@0,0 {
				compatible = "intel,ixp4xx-flash", "cfi-flash";
				bank-width = <2>;
				/* Enable writes on the expansion bus */
				intel,ixp4xx-eb-write-enable = <1>;
				/* 16 MB of Flash mapped in at CS0 */
				reg = <0 0x00000000 0x1000000>;

				partitions {
					compatible = "redboot-fis";
					/* Eraseblock at 0x0fe0000 */
					fis-index-block = <0x7f>;
				};
			};
		};

		pci@c0000000 {
			status = "ok";

			/*
			 * The device has 4 slots (IDSEL) with one dedicated IRQ per slot.
			 * The slots have Ethernet, Ethernet, NEC and MPCI.
			 * The IDSELs are 11, 12, 13, 14.
			 */
			interrupt-map =
			/* IDSEL 11 - Ethernet A */
			<0x5800 0 0 1 &gpio0 4 IRQ_TYPE_LEVEL_LOW>, /* INT A on slot 11 is irq 4 */
			<0x5800 0 0 2 &gpio0 4 IRQ_TYPE_LEVEL_LOW>, /* INT B on slot 11 is irq 4 */
			<0x5800 0 0 3 &gpio0 4 IRQ_TYPE_LEVEL_LOW>, /* INT C on slot 11 is irq 4 */
			<0x5800 0 0 4 &gpio0 4 IRQ_TYPE_LEVEL_LOW>, /* INT D on slot 11 is irq 4 */
			/* IDSEL 12 - Ethernet B */
			<0x6000 0 0 1 &gpio0 5 IRQ_TYPE_LEVEL_LOW>, /* INT A on slot 12 is irq 5 */
			<0x6000 0 0 2 &gpio0 5 IRQ_TYPE_LEVEL_LOW>, /* INT B on slot 12 is irq 5 */
			<0x6000 0 0 3 &gpio0 5 IRQ_TYPE_LEVEL_LOW>, /* INT C on slot 12 is irq 5 */
			<0x6000 0 0 4 &gpio0 5 IRQ_TYPE_LEVEL_LOW>, /* INT D on slot 12 is irq 5 */
			/* IDSEL 13 - MPCI */
			<0x6800 0 0 1 &gpio0 12 IRQ_TYPE_LEVEL_LOW>, /* INT A on slot 13 is irq 12 */
			<0x6800 0 0 2 &gpio0 12 IRQ_TYPE_LEVEL_LOW>, /* INT B on slot 13 is irq 12 */
			<0x6800 0 0 3 &gpio0 12 IRQ_TYPE_LEVEL_LOW>, /* INT C on slot 13 is irq 12 */
			<0x6800 0 0 4 &gpio0 12 IRQ_TYPE_LEVEL_LOW>, /* INT D on slot 13 is irq 12 */
			/* IDSEL 14 - NEC */
			<0x7000 0 0 1 &gpio0 3 IRQ_TYPE_LEVEL_LOW>, /* INT A on slot 14 is irq 3 */
			<0x7000 0 0 2 &gpio0 3 IRQ_TYPE_LEVEL_LOW>, /* INT B on slot 14 is irq 3 */
			<0x7000 0 0 3 &gpio0 3 IRQ_TYPE_LEVEL_LOW>, /* INT C on slot 14 is irq 3 */
			<0x7000 0 0 4 &gpio0 3 IRQ_TYPE_LEVEL_LOW>; /* INT D on slot 14 is irq 3 */
		};

		/* HSS links */
		npe@c8006000 {
			hss@0 {
				status = "okay";
				intel,queue-chl-rxtrig = <&qmgr 12>;
				intel,queue-chl-txready = <&qmgr 34>;
				intel,queue-pkt-rx = <&qmgr 13>;
				intel,queue-pkt-tx = <&qmgr 14>, <&qmgr 15>, <&qmgr 16>, <&qmgr 17>;
				intel,queue-pkt-rxfree = <&qmgr 18>, <&qmgr 19>, <&qmgr 20>, <&qmgr 21>;
				intel,queue-pkt-txdone = <&qmgr 22>;
				/* The Goramo GPIO-based clock etc control */
				cts-gpios = <&gpio0 10 GPIO_ACTIVE_LOW>;
				rts-gpios = <&gpio0 14 GPIO_ACTIVE_LOW>;
				dcd-gpios = <&gpio0 6 GPIO_ACTIVE_LOW>;
				dtr-gpios = <&gpio_74 2 GPIO_ACTIVE_LOW>;
				clk-internal-gpios = <&gpio_74 0 GPIO_ACTIVE_HIGH>;
			};
			hss@1 {
				status = "okay";
				intel,queue-chl-rxtrig = <&qmgr 10>;
				intel,queue-chl-txready = <&qmgr 35>;
				intel,queue-pkt-rx = <&qmgr 0>;
				intel,queue-pkt-tx = <&qmgr 5>, <&qmgr 6>, <&qmgr 7>, <&qmgr 8>;
				intel,queue-pkt-rxfree = <&qmgr 1>, <&qmgr 2>, <&qmgr 3>, <&qmgr 4>;
				intel,queue-pkt-txdone = <&qmgr 9>;
				/* The Goramo GPIO-based clock etc control */
				cts-gpios = <&gpio0 11 GPIO_ACTIVE_LOW>;
				rts-gpios = <&gpio0 13 GPIO_ACTIVE_LOW>;
				dcd-gpios = <&gpio0 7 GPIO_ACTIVE_LOW>;
				dtr-gpios = <&gpio_74 3 GPIO_ACTIVE_LOW>;
				clk-internal-gpios = <&gpio_74 1 GPIO_ACTIVE_HIGH>;
			};
		};

		/* EthB */
		ethernet@c8009000 {
			status = "ok";
			queue-rx = <&qmgr 3>;
			queue-txready = <&qmgr 32>;
			phy-mode = "rgmii";
			phy-handle = <&phy0>;

			mdio {
				#address-cells = <1>;
				#size-cells = <0>;

				phy0: ethernet-phy@0 {
					reg = <0>;
				};

				phy1: ethernet-phy@1 {
					reg = <1>;
				};
			};
		};

		/* EthC */
		ethernet@c800a000 {
			status = "ok";
			queue-rx = <&qmgr 4>;
			queue-txready = <&qmgr 33>;
			phy-mode = "rgmii";
			phy-handle = <&phy1>;
		};
	};
};