[PATCH] ARM: dts: ixp4xx: Add USRobotics USR8200 device tree

From: Linus Walleij
Date: Sat Oct 07 2023 - 08:32:49 EST

This is a USRobotics NAS/Firewall/router that has been supported
by OpenWrt in the past. It had dedicated users so let's get it
properly supported.

Some debugging and fixing was provided by Howard Harte.

Signed-off-by: Linus Walleij <linus.walleij@xxxxxxxxxx>
---
arch/arm/boot/dts/intel/ixp/Makefile | 3 +-
.../intel/ixp/intel-ixp42x-usrobotics-usr8200.dts | 229 +++++++++++++++++++++
2 files changed, 231 insertions(+), 1 deletion(-)

diff --git a/arch/arm/boot/dts/intel/ixp/Makefile b/arch/arm/boot/dts/intel/ixp/Makefile
index 1a25ce3cf84f..ab8525f1ea1d 100644
--- a/arch/arm/boot/dts/intel/ixp/Makefile
+++ b/arch/arm/boot/dts/intel/ixp/Makefile
@@ -16,4 +16,5 @@ dtb-$(CONFIG_ARCH_IXP4XX) += \
intel-ixp43x-gateworks-gw2358.dtb \
intel-ixp42x-netgear-wg302v1.dtb \
intel-ixp42x-arcom-vulcan.dtb \
- intel-ixp42x-gateway-7001.dtb
+ intel-ixp42x-gateway-7001.dtb \
+ intel-ixp42x-usrobotics-usr8200.dtb
diff --git a/arch/arm/boot/dts/intel/ixp/intel-ixp42x-usrobotics-usr8200.dts b/arch/arm/boot/dts/intel/ixp/intel-ixp42x-usrobotics-usr8200.dts
new file mode 100644
index 000000000000..90fd51b36e7d
--- /dev/null
+++ b/arch/arm/boot/dts/intel/ixp/intel-ixp42x-usrobotics-usr8200.dts
@@ -0,0 +1,229 @@
+// SPDX-License-Identifier: ISC
+/*
+ * Device Tree file for the USRobotics USR8200 firewall
+ * VPN and NAS. Based on know-how from Peter Denison.
+ *
+ * This machine is based on IXP422, the USR internal codename
+ * is "Jeeves".
+ */
+
+/dts-v1/;
+
+#include "intel-ixp42x.dtsi"
+#include <dt-bindings/input/input.h>
+
+/ {
+ model = "USRobotics USR8200";
+ compatible = "usr,usr8200", "intel,ixp42x";
+ #address-cells = <1>;
+ #size-cells = <1>;
+
+ memory@0 {
+ device_type = "memory";
+ reg = <0x00000000 0x4000000>;
+ };
+
+ chosen {
+ bootargs = "console=ttyS0,115200n8";
+ stdout-path = "uart1:115200n8";
+ };
+
+ aliases {
+ /* These are switched around */
+ serial0 = &uart1;
+ serial1 = &uart0;
+ };
+
+ leds {
+ compatible = "gpio-leds";
+ ieee1394_led: led-1394 {
+ label = "usr8200:green:1394";
+ gpios = <&gpio0 0 GPIO_ACTIVE_LOW>;
+ default-state = "off";
+ };
+ usb1_led: led-usb1 {
+ label = "usr8200:green:usb1";
+ gpios = <&gpio0 1 GPIO_ACTIVE_LOW>;
+ default-state = "off";
+ };
+ usb2_led: led-usb2 {
+ label = "usr8200:green:usb2";
+ gpios = <&gpio0 2 GPIO_ACTIVE_LOW>;
+ default-state = "off";
+ };
+ wireless_led: led-wireless {
+ /*
+ * This LED is mounted inside the case but cannot be
+ * seen from the outside: probably USR planned at one
+ * point for the device to have a wireless card, then
+ * changed their mind and didn't mount it, leaving the
+ * LED in place.
+ */
+ label = "usr8200:green:wireless";
+ gpios = <&gpio0 3 GPIO_ACTIVE_LOW>;
+ default-state = "off";
+ };
+ pwr_led: led-pwr {
+ label = "usr8200:green:pwr";
+ gpios = <&gpio0 14 GPIO_ACTIVE_HIGH>;
+ default-state = "on";
+ linux,default-trigger = "heartbeat";
+ };
+ };
+
+ gpio_keys {
+ compatible = "gpio-keys";
+
+ button-reset {
+ wakeup-source;
+ linux,code = <KEY_RESTART>;
+ label = "reset";
+ gpios = <&gpio0 12 GPIO_ACTIVE_LOW>;
+ };
+ };
+
+ 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>;
+ };
+ };
+ rtc@2,0 {
+ /* EPSON RTC7301 DG DIL-capsule */
+ compatible = "epson,rtc7301dg";
+ /*
+ * These timing settings were found in the boardfile patch:
+ * IXP4XX_EXP_CS2 = 0x3fff000 | IXP4XX_EXP_BUS_SIZE(0) | IXP4XX_EXP_BUS_WR_EN |
+ * IXP4XX_EXP_BUS_CS_EN | IXP4XX_EXP_BUS_BYTE_EN;
+ */
+ intel,ixp4xx-eb-t1 = <0>; // no cycles extra address phase
+ intel,ixp4xx-eb-t2 = <0>; // no cycles extra setup phase
+ intel,ixp4xx-eb-t3 = <15>; // 15 cycles extra strobe phase
+ intel,ixp4xx-eb-t4 = <3>; // 3 cycles extra hold phase
+ intel,ixp4xx-eb-t5 = <15>; // 15 cycles extra recovery phase
+ intel,ixp4xx-eb-cycle-type = <0>; // Intel cycle
+ intel,ixp4xx-eb-byte-access-on-halfword = <0>;
+ intel,ixp4xx-eb-mux-address-and-data = <0>;
+ intel,ixp4xx-eb-ahb-split-transfers = <0>;
+ intel,ixp4xx-eb-write-enable = <1>;
+ intel,ixp4xx-eb-byte-access = <1>;
+ /* 512 bytes at CS2 */
+ reg = <2 0x00000000 0x0000200>;
+ reg-io-width = <1>;
+ native-endian;
+ /* FIXME: try to check if there is an IRQ for the RTC? */
+ };
+ };
+
+ pci@c0000000 {
+ status = "okay";
+
+ /*
+ * Taken from USR8200 boardfile from OpenWrt
+ *
+ * We have 3 slots (IDSEL) with partly swizzled IRQs on slot 16.
+ * We assume the same IRQ for all pins on the remaining slots, that
+ * is what the boardfile was doing.
+ */
+ #interrupt-cells = <1>;
+ interrupt-map-mask = <0xf800 0 0 7>;
+ interrupt-map =
+ /* IDSEL 14 used for "Wireless" in the board file */
+ <0x7000 0 0 1 &gpio0 7 IRQ_TYPE_LEVEL_LOW>, /* INT A on slot 14 is irq 7 */
+ /* IDSEL 15 used for VIA VT6307 IEEE 1394 Firewire */
+ <0x7800 0 0 1 &gpio0 8 IRQ_TYPE_LEVEL_LOW>, /* INT A on slot 15 is irq 8 */
+ /* IDSEL 16 used for VIA VT6202 USB 2.0 4+1 */
+ <0x8000 0 0 1 &gpio0 11 IRQ_TYPE_LEVEL_LOW>, /* INT A on slot 16 is irq 11 */
+ <0x8000 0 0 2 &gpio0 10 IRQ_TYPE_LEVEL_LOW>, /* INT B on slot 16 is irq 10 */
+ <0x8000 0 0 3 &gpio0 9 IRQ_TYPE_LEVEL_LOW>; /* INT C on slot 16 is irq 9 */
+ };
+
+ gpio@c8004000 {
+ /* Enable clock out on GPIO 15 */
+ intel,ixp4xx-gpio15-clkout;
+ };
+
+ /* EthB WAN */
+ ethernet@c8009000 {
+ status = "okay";
+ queue-rx = <&qmgr 3>;
+ queue-txready = <&qmgr 20>;
+ phy-mode = "rgmii";
+ phy-handle = <&phy9>;
+
+ mdio {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ phy9: ethernet-phy@9 {
+ reg = <9>;
+ };
+
+ /* The switch uses MDIO addresses 16 thru 31 */
+ switch@16 {
+ compatible = "marvell,mv88e6060";
+ reg = <16>;
+
+ ports {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ port@0 {
+ reg = <0>;
+ label = "lan1";
+ };
+
+ port@1 {
+ reg = <1>;
+ label = "lan2";
+ };
+
+ port@2 {
+ reg = <2>;
+ label = "lan3";
+ };
+
+ port@3 {
+ reg = <3>;
+ label = "lan4";
+ };
+
+ port@5 {
+ /* Port 5 is the CPU port according to the MV88E6060 datasheet */
+ reg = <5>;
+ phy-mode = "rgmii-id";
+ ethernet = <&ethc>;
+ label = "cpu";
+ fixed-link {
+ speed = <100>;
+ full-duplex;
+ };
+ };
+ };
+ };
+ };
+ };
+
+ /* EthC LAN connected to the Marvell DSA Switch */
+ ethc: ethernet@c800a000 {
+ status = "okay";
+ queue-rx = <&qmgr 4>;
+ queue-txready = <&qmgr 21>;
+ phy-mode = "rgmii";
+ fixed-link {
+ speed = <100>;
+ full-duplex;
+ };
+ };
+ };
+};

---
base-commit: 0bb80ecc33a8fb5a682236443c1e740d5c917d1d
change-id: 20230919-ixp4xx-usr8200-b2408d6fcad5

Best regards,
--
Linus Walleij <linus.walleij@xxxxxxxxxx>