@@ -11,6 +11,11 @@ gateworks,gw2358)
linksys,nslu2)
ucidef_set_interface_lan "eth0" "dhcp"
;;
+usr,usr8200)
+ # LAN ports connected to eth1 thru the MV88E6060 DSA switch
+ ucidef_set_interface "eth" device "eth1" protocol "none"
+ ucidef_set_interfaces_lan_wan "lan1 lan2 lan3 lan4" "eth0"
+ ;;
*)
ucidef_set_interface_lan "eth0" "dhcp"
;;
@@ -1,4 +1,5 @@
CONFIG_ALIGNMENT_TRAP=y
+CONFIG_AMD_PHY=y
CONFIG_ARCH_32BIT_OFF_T=y
CONFIG_ARCH_HIBERNATION_POSSIBLE=y
CONFIG_ARCH_IXP4XX=y
@@ -62,6 +62,7 @@ TARGET_DEVICES += cambria
define Device/nslu2
DEVICE_VENDOR := Linksys
DEVICE_MODEL := NSLU2
+ # USB2 is compiled in and needs no package
DEVICE_PACKAGES := apex ixp4xx-microcode-ethernet kmod-rtc-x1205
# Only 32 MB of RAM so not building by default
DEFAULT := n
@@ -73,4 +74,17 @@ define Device/nslu2
endef
TARGET_DEVICES += nslu2
+define Device/usr8200
+ DEVICE_VENDOR := USRobotics
+ DEVICE_MODEL := USR8200
+ # USB2 is compiled in and needs no package
+ DEVICE_PACKAGES := ixp4xx-microcode-ethernet kmod-rtc-r7301 kmod-firewire kmod-firewire-ohci
+ DEVICE_DTS := intel-ixp42x-usrobotics-usr8200
+ KERNEL := kernel-bin | append-dtb
+ IMAGES := kernel.bin rootfs.bin
+ IMAGE/kernel.bin := append-kernel
+ IMAGE/rootfs.bin := append-rootfs | pad-rootfs | pad-to 128k
+endef
+TARGET_DEVICES += usr8200
+
$(eval $(call BuildImage))
new file mode 100644
@@ -0,0 +1,98 @@
+From fc58944733a2082e3290eda240eb3247a00ad73a Mon Sep 17 00:00:00 2001
+From: Linus Walleij <linus.walleij@linaro.org>
+Date: Thu, 21 Sep 2023 00:12:42 +0200
+Subject: [PATCH] gpio: ixp4xx: Handle clock output on pin 14 and 15
+
+This makes it possible to provide basic clock output on pins
+14 and 15. The clocks are typically used by random electronics,
+not modeled in the device tree, so they just need to be provided
+on request.
+
+In order to not disturb old systems that require that the
+hardware defaults are kept in the clock setting bits, we only
+manipulate these if either device tree property is present.
+Once we know a device needs one of the clocks we can set it
+in the device tree.
+
+Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
+---
+ drivers/gpio/gpio-ixp4xx.c | 49 +++++++++++++++++++++++++++++++++++++-
+ 1 file changed, 48 insertions(+), 1 deletion(-)
+
+diff --git a/drivers/gpio/gpio-ixp4xx.c b/drivers/gpio/gpio-ixp4xx.c
+index dde6cf3a5779..1ca3217d0aab 100644
+--- a/drivers/gpio/gpio-ixp4xx.c
++++ b/drivers/gpio/gpio-ixp4xx.c
+@@ -38,6 +38,18 @@
+ #define IXP4XX_GPIO_STYLE_MASK GENMASK(2, 0)
+ #define IXP4XX_GPIO_STYLE_SIZE 3
+
++/*
++ * Clock output control register defines.
++ */
++#define IXP4XX_GPCLK_CLK0DC_SHIFT 0
++#define IXP4XX_GPCLK_CLK0TC_SHIFT 4
++#define IXP4XX_GPCLK_CLK0_MASK GENMASK(7, 0)
++#define IXP4XX_GPCLK_MUX14 BIT(8)
++#define IXP4XX_GPCLK_CLK1DC_SHIFT 16
++#define IXP4XX_GPCLK_CLK1TC_SHIFT 20
++#define IXP4XX_GPCLK_CLK1_MASK GENMASK(23, 16)
++#define IXP4XX_GPCLK_MUX15 BIT(24)
++
+ /**
+ * struct ixp4xx_gpio - IXP4 GPIO state container
+ * @dev: containing device for this instance
+@@ -202,6 +214,8 @@ static int ixp4xx_gpio_probe(struct platform_device *pdev)
+ struct ixp4xx_gpio *g;
+ struct gpio_irq_chip *girq;
+ struct device_node *irq_parent;
++ bool clk_14, clk_15;
++ u32 val;
+ int ret;
+
+ g = devm_kzalloc(dev, sizeof(*g), GFP_KERNEL);
+@@ -231,7 +245,40 @@ static int ixp4xx_gpio_probe(struct platform_device *pdev)
+ */
+ if (of_machine_is_compatible("dlink,dsm-g600-a") ||
+ of_machine_is_compatible("iom,nas-100d"))
+- __raw_writel(0x0, g->base + IXP4XX_REG_GPCLK);
++ val = 0;
++ else
++ val = __raw_readl(g->base + IXP4XX_REG_GPCLK);
++
++ /*
++ * If either clock output is enabled explicitly in the device tree
++ * we take full control of the clock by masking off all bits for
++ * the clock control and selectively enabling them. Otherwise
++ * we leave the hardware default settings.
++ *
++ * Enable clock outputs with default timings of requested clock.
++ * If you need control over TC and DC, add these to the device
++ * tree bindings and use them here.
++ */
++ clk_14 = of_property_read_bool(np, "intel,ixp4xx-gpio14-clkout");
++ clk_15 = of_property_read_bool(np, "intel,ixp4xx-gpio15-clkout");
++ if (clk_14 || clk_15) {
++ val &= ~(IXP4XX_GPCLK_MUX14 | IXP4XX_GPCLK_MUX15);
++ val &= ~IXP4XX_GPCLK_CLK0_MASK;
++ val &= ~IXP4XX_GPCLK_CLK1_MASK;
++ if (clk_14) {
++ val |= (0 << IXP4XX_GPCLK_CLK0DC_SHIFT);
++ val |= (1 << IXP4XX_GPCLK_CLK0TC_SHIFT);
++ val |= IXP4XX_GPCLK_MUX14;
++ }
++
++ if (clk_15) {
++ val |= (0 << IXP4XX_GPCLK_CLK1DC_SHIFT);
++ val |= (1 << IXP4XX_GPCLK_CLK1TC_SHIFT);
++ val |= IXP4XX_GPCLK_MUX15;
++ }
++ }
++
++ __raw_writel(val, g->base + IXP4XX_REG_GPCLK);
+
+ /*
+ * This is a very special big-endian ARM issue: when the IXP4xx is
+--
+2.41.0
+
new file mode 100644
@@ -0,0 +1,93 @@
+From f7415d445b0f012e371bb92d99c24e2728125299 Mon Sep 17 00:00:00 2001
+From: Linus Walleij <linus.walleij@linaro.org>
+Date: Thu, 21 Sep 2023 22:18:12 +0200
+Subject: [PATCH 2/3] rtc: rtc7301: Support byte-addressed IO
+
+The old RTC7301 driver in OpenWrt used byte access, but the
+current mainline Linux driver uses 32bit word access.
+
+Make this configurable using device properties using the
+standard property "reg-io-width" in e.g. device tree.
+
+This is needed for the USRobotics USR8200 which has the
+chip connected using byte accesses.
+
+Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
+---
+ drivers/rtc/rtc-r7301.c | 32 ++++++++++++++++++++++++++++++--
+ 1 file changed, 30 insertions(+), 2 deletions(-)
+
+diff --git a/drivers/rtc/rtc-r7301.c b/drivers/rtc/rtc-r7301.c
+index 5dbaeb7af648..843e16966b65 100644
+--- a/drivers/rtc/rtc-r7301.c
++++ b/drivers/rtc/rtc-r7301.c
+@@ -14,6 +14,7 @@
+ #include <linux/module.h>
+ #include <linux/mod_devicetable.h>
+ #include <linux/delay.h>
++#include <linux/property.h>
+ #include <linux/regmap.h>
+ #include <linux/platform_device.h>
+ #include <linux/rtc.h>
+@@ -55,12 +56,23 @@ struct rtc7301_priv {
+ u8 bank;
+ };
+
+-static const struct regmap_config rtc7301_regmap_config = {
++/*
++ * When the device is memory-mapped, some platforms pack the registers into
++ * 32-bit access using the lower 8 bits at each 4-byte stride, while others
++ * expose them as simply consequitive bytes.
++ */
++static const struct regmap_config rtc7301_regmap_32_config = {
+ .reg_bits = 32,
+ .val_bits = 8,
+ .reg_stride = 4,
+ };
+
++static const struct regmap_config rtc7301_regmap_8_config = {
++ .reg_bits = 8,
++ .val_bits = 8,
++ .reg_stride = 1,
++};
++
+ static u8 rtc7301_read(struct rtc7301_priv *priv, unsigned int reg)
+ {
+ int reg_stride = regmap_get_reg_stride(priv->regmap);
+@@ -356,7 +368,9 @@ static int __init rtc7301_rtc_probe(struct platform_device *dev)
+ void __iomem *regs;
+ struct rtc7301_priv *priv;
+ struct rtc_device *rtc;
++ static const struct regmap_config *mapconf;
+ int ret;
++ u32 val;
+
+ priv = devm_kzalloc(&dev->dev, sizeof(*priv), GFP_KERNEL);
+ if (!priv)
+@@ -366,8 +380,22 @@ static int __init rtc7301_rtc_probe(struct platform_device *dev)
+ if (IS_ERR(regs))
+ return PTR_ERR(regs);
+
++ ret = device_property_read_u32(&dev->dev, "reg-io-width", &val);
++ if (!ret)
++ /* Default to 32bit accesses */
++ val = 4;
++
++ switch (val) {
++ case 1:
++ mapconf = &rtc7301_regmap_8_config;
++ break;
++ case 4:
++ default:
++ mapconf = &rtc7301_regmap_32_config;
++ }
++
+ priv->regmap = devm_regmap_init_mmio(&dev->dev, regs,
+- &rtc7301_regmap_config);
++ mapconf);
+ if (IS_ERR(priv->regmap))
+ return PTR_ERR(priv->regmap);
+
+--
+2.41.0
+
new file mode 100644
@@ -0,0 +1,268 @@
+From d975123469a640de77cba9b28c527780953052c9 Mon Sep 17 00:00:00 2001
+From: Linus Walleij <linus.walleij@linaro.org>
+Date: Tue, 19 Sep 2023 16:02:15 +0200
+Subject: [PATCH] ARM: dts: ixp4xx: Add USRobotics USR8200 device tree
+
+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.
+
+Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
+---
+ arch/arm/boot/dts/Makefile | 3 +-
+ .../dts/intel-ixp42x-usrobotics-usr8200.dts | 229 ++++++++++++++++++
+ 2 files changed, 231 insertions(+), 1 deletion(-)
+ create mode 100644 arch/arm/boot/dts/intel-ixp42x-usrobotics-usr8200.dts
+
+diff --git a/arch/arm/boot/dts/Makefile b/arch/arm/boot/dts/Makefile
+index 6aa7dc4db2fc..2089038b12ef 100644
+--- a/arch/arm/boot/dts/Makefile
++++ b/arch/arm/boot/dts/Makefile
+@@ -292,7 +292,8 @@ 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
+ dtb-$(CONFIG_ARCH_KEYSTONE) += \
+ keystone-k2hk-evm.dtb \
+ keystone-k2l-evm.dtb \
+diff --git a/arch/arm/boot/dts/intel-ixp42x-usrobotics-usr8200.dts b/arch/arm/boot/dts/intel-ixp42x-usrobotics-usr8200.dts
+new file mode 100644
+index 000000000000..b88ac5c20685
+--- /dev/null
++++ b/arch/arm/boot/dts/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";
++ usb1_led: led-usb1 {
++ label = "usr8200:green:usb1";
++ gpios = <&gpio0 0 GPIO_ACTIVE_LOW>;
++ default-state = "off";
++ };
++ usb2_led: led-usb2 {
++ label = "usr8200:green:usb2";
++ gpios = <&gpio0 1 GPIO_ACTIVE_LOW>;
++ default-state = "off";
++ };
++ ieee1394_led: led-1394 {
++ label = "usr8200:green:1394";
++ 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:red: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 = <3>; // FIXME: Reserved?? Try 0.
++ 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 = <ðc>;
++ 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;
++ };
++ };
++ };
++};
+--
+2.41.0
+
new file mode 100644
@@ -0,0 +1,135 @@
+From dc40504df75ea47803aeb10572fe7b0376b57522 Mon Sep 17 00:00:00 2001
+From: Linus Walleij <linus.walleij@linaro.org>
+Date: Fri, 22 Sep 2023 23:18:22 +0200
+Subject: [PATCH] net: ixp4xx_eth: Support changing the MTU
+
+As we don't specify the MTU in the driver, the framework
+will fall back to 1500 bytes and this doesn't work very
+well when we try to attach a DSA switch:
+
+ eth1: mtu greater than device maximum
+ ixp4xx_eth c800a000.ethernet eth1: error -22 setting
+ MTU to 1504 to include DSA overhead
+
+After locating an out-of-tree patch in OpenWrt I found
+suitable code to set the MTU on the interface and ported
+it and updated it. Now the MTU gets set properly.
+
+Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
+---
+ drivers/net/ethernet/xscale/ixp4xx_eth.c | 64 +++++++++++++++++++++++-
+ 1 file changed, 63 insertions(+), 1 deletion(-)
+
+diff --git a/drivers/net/ethernet/xscale/ixp4xx_eth.c b/drivers/net/ethernet/xscale/ixp4xx_eth.c
+index 3b0c5f177447..18e52abc005b 100644
+--- a/drivers/net/ethernet/xscale/ixp4xx_eth.c
++++ b/drivers/net/ethernet/xscale/ixp4xx_eth.c
+@@ -24,6 +24,7 @@
+ #include <linux/dma-mapping.h>
+ #include <linux/dmapool.h>
+ #include <linux/etherdevice.h>
++#include <linux/if_vlan.h>
+ #include <linux/io.h>
+ #include <linux/kernel.h>
+ #include <linux/net_tstamp.h>
+@@ -63,7 +64,15 @@
+
+ #define POOL_ALLOC_SIZE (sizeof(struct desc) * (RX_DESCS + TX_DESCS))
+ #define REGS_SIZE 0x1000
+-#define MAX_MRU 1536 /* 0x600 */
++
++/* MRU is said to be 14320 in a code dump, the SW manual says that
++ * MRU/MTU is 16320 and includes VLAN and ethernet headers.
++ * See "IXP400 Software Programmer's Guide" section 10.3.2, page 161.
++ *
++ * FIXME: we have chosen the safe default (14320) but if you can test
++ * jumboframes, experiment with 16320 and see what happens!
++ */
++#define MAX_MRU (14320 - VLAN_ETH_HLEN)
+ #define RX_BUFF_SIZE ALIGN((NET_IP_ALIGN) + MAX_MRU, 4)
+
+ #define NAPI_WEIGHT 16
+@@ -1182,6 +1191,53 @@ static void destroy_queues(struct port *port)
+ }
+ }
+
++static int ixp4xx_do_change_mtu(struct net_device *dev, int new_mtu)
++{
++ struct port *port = netdev_priv(dev);
++ struct npe *npe = port->npe;
++ struct msg msg;
++ /* adjust for ethernet headers */
++ int framesize = new_mtu + VLAN_ETH_HLEN;
++ /* max rx/tx 64 byte chunks */
++ int chunks = DIV_ROUND_UP(framesize, 64);
++
++ memset(&msg, 0, sizeof(msg));
++ msg.cmd = NPE_SETMAXFRAMELENGTHS;
++ msg.eth_id = port->id;
++
++ /* Firmware wants to know buffer size in 64 byte chunks */
++ msg.byte2 = chunks << 8;
++ msg.byte3 = chunks << 8;
++
++ msg.byte4 = msg.byte6 = framesize >> 8;
++ msg.byte5 = msg.byte7 = framesize & 0xff;
++
++ if (npe_send_recv_message(npe, &msg, "ETH_SET_MAX_FRAME_LENGTH"))
++ return -EIO;
++ netdev_dbg(dev, "set MTU on NPE %s to %d bytes\n",
++ npe_name(npe), new_mtu);
++
++ return 0;
++}
++
++static int ixp4xx_eth_change_mtu(struct net_device *dev, int new_mtu)
++{
++ int ret;
++
++ /* MTU can only be changed when the interface is up. We also
++ * set the MTU from dev->mtu when opening the device.
++ */
++ if (dev->flags & IFF_UP) {
++ ret = ixp4xx_do_change_mtu(dev, new_mtu);
++ if (ret < 0)
++ return ret;
++ }
++
++ dev->mtu = new_mtu;
++
++ return 0;
++}
++
+ static int eth_open(struct net_device *dev)
+ {
+ struct port *port = netdev_priv(dev);
+@@ -1232,6 +1288,8 @@ static int eth_open(struct net_device *dev)
+ if (npe_send_recv_message(port->npe, &msg, "ETH_SET_FIREWALL_MODE"))
+ return -EIO;
+
++ ixp4xx_do_change_mtu(dev, dev->mtu);
++
+ if ((err = request_queues(port)) != 0)
+ return err;
+
+@@ -1374,6 +1432,7 @@ static int eth_close(struct net_device *dev)
+ static const struct net_device_ops ixp4xx_netdev_ops = {
+ .ndo_open = eth_open,
+ .ndo_stop = eth_close,
++ .ndo_change_mtu = ixp4xx_eth_change_mtu,
+ .ndo_start_xmit = eth_xmit,
+ .ndo_set_rx_mode = eth_set_mcast_list,
+ .ndo_eth_ioctl = eth_ioctl,
+@@ -1488,6 +1547,9 @@ static int ixp4xx_eth_probe(struct platform_device *pdev)
+ ndev->dev.dma_mask = dev->dma_mask;
+ ndev->dev.coherent_dma_mask = dev->coherent_dma_mask;
+
++ ndev->min_mtu = ETH_MIN_MTU;
++ ndev->max_mtu = MAX_MRU;
++
+ netif_napi_add_weight(ndev, &port->napi, eth_poll, NAPI_WEIGHT);
+
+ if (!(port->npe = npe_request(NPE_ID(port->id))))
+--
+2.41.0
+
new file mode 100644
@@ -0,0 +1,89 @@
+From 49e5663b505070424e18099841943f34342aa405 Mon Sep 17 00:00:00 2001
+From: Linus Walleij <linus.walleij@linaro.org>
+Date: Sun, 24 Sep 2023 01:09:01 +0200
+Subject: [PATCH] net: phy: amd: Support the Altima AMI101L
+
+The Altima AC101L is obviously compatible with the AMD PHY,
+as seen by reading the datasheet.
+
+Datasheet: https://docs.broadcom.com/doc/AC101L-DS05-405-RDS.pdf
+
+Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
+---
+ drivers/net/phy/Kconfig | 4 ++--
+ drivers/net/phy/amd.c | 33 +++++++++++++++++++++++----------
+ 2 files changed, 25 insertions(+), 12 deletions(-)
+
+diff --git a/drivers/net/phy/Kconfig b/drivers/net/phy/Kconfig
+index 107880d13d21..421d2b62918f 100644
+--- a/drivers/net/phy/Kconfig
++++ b/drivers/net/phy/Kconfig
+@@ -69,9 +69,9 @@ config SFP
+ comment "MII PHY device drivers"
+
+ config AMD_PHY
+- tristate "AMD PHYs"
++ tristate "AMD and Altima PHYs"
+ help
+- Currently supports the am79c874
++ Currently supports the AMD am79c874 and Altima AC101L.
+
+ config MESON_GXL_PHY
+ tristate "Amlogic Meson GXL Internal PHY"
+diff --git a/drivers/net/phy/amd.c b/drivers/net/phy/amd.c
+index 001bb6d8bfce..930b15fa6ce9 100644
+--- a/drivers/net/phy/amd.c
++++ b/drivers/net/phy/amd.c
+@@ -13,6 +13,7 @@
+ #include <linux/mii.h>
+ #include <linux/phy.h>
+
++#define PHY_ID_AC101L 0x00225520
+ #define PHY_ID_AM79C874 0x0022561b
+
+ #define MII_AM79C_IR 17 /* Interrupt Status/Control Register */
+@@ -87,19 +88,31 @@ static irqreturn_t am79c_handle_interrupt(struct phy_device *phydev)
+ return IRQ_HANDLED;
+ }
+
+-static struct phy_driver am79c_driver[] = { {
+- .phy_id = PHY_ID_AM79C874,
+- .name = "AM79C874",
+- .phy_id_mask = 0xfffffff0,
+- /* PHY_BASIC_FEATURES */
+- .config_init = am79c_config_init,
+- .config_intr = am79c_config_intr,
+- .handle_interrupt = am79c_handle_interrupt,
+-} };
++static struct phy_driver am79c_drivers[] = {
++ {
++ .phy_id = PHY_ID_AM79C874,
++ .name = "AM79C874",
++ .phy_id_mask = 0xfffffff0,
++ /* PHY_BASIC_FEATURES */
++ .config_init = am79c_config_init,
++ .config_intr = am79c_config_intr,
++ .handle_interrupt = am79c_handle_interrupt,
++ },
++ {
++ .phy_id = PHY_ID_AC101L,
++ .name = "AC101L",
++ .phy_id_mask = 0xfffffff0,
++ /* PHY_BASIC_FEATURES */
++ .config_init = am79c_config_init,
++ .config_intr = am79c_config_intr,
++ .handle_interrupt = am79c_handle_interrupt,
++ },
++};
+
+-module_phy_driver(am79c_driver);
++module_phy_driver(am79c_drivers);
+
+ static struct mdio_device_id __maybe_unused amd_tbl[] = {
++ { PHY_ID_AC101L, 0xfffffff0 },
+ { PHY_ID_AM79C874, 0xfffffff0 },
+ { }
+ };
+--
+2.41.0
+
new file mode 100644
@@ -0,0 +1,84 @@
+From b09e5ea32e099821b1cddc1e26e625ad994ba11e Mon Sep 17 00:00:00 2001
+From: Linus Walleij <linus.walleij@linaro.org>
+Date: Sun, 24 Sep 2023 21:20:24 +0200
+Subject: [PATCH] watchdog: ixp4xx: Make sure restart always works
+
+The IXP4xx watchdog in early "A0" silicon is unreliable and
+cannot be registered, however for some systems such as the
+USRobotics USR8200 the watchdog is the only restart option,
+so implement a "dummy" watchdog that can only support restart
+in this case.
+
+Fixes: 1aea522809e6 ("watchdog: ixp4xx: Implement restart")
+Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
+---
+Other solutions like implementing a pure restart notifier
+callback catch in the driver is possible, but this method
+will minimize the amount of code and reuse infrastructure
+in the core.
+---
+ drivers/watchdog/ixp4xx_wdt.c | 28 +++++++++++++++++++++++++---
+ 1 file changed, 25 insertions(+), 3 deletions(-)
+
+diff --git a/drivers/watchdog/ixp4xx_wdt.c b/drivers/watchdog/ixp4xx_wdt.c
+index 607ce4b8df57..c0bf03125ec8 100644
+--- a/drivers/watchdog/ixp4xx_wdt.c
++++ b/drivers/watchdog/ixp4xx_wdt.c
+@@ -105,6 +105,25 @@ static const struct watchdog_ops ixp4xx_wdt_ops = {
+ .owner = THIS_MODULE,
+ };
+
++/*
++ * The A0 version of the IXP422 had a bug in the watchdog making
++ * is useless, but we still need to use it to restart the system
++ * as it is the only way, so in this special case we register a
++ * "dummy" watchdog that doesn't really work, but will support
++ * the restart operation.
++ */
++static int ixp4xx_wdt_dummy(struct watchdog_device *wdd)
++{
++ return 0;
++}
++
++static const struct watchdog_ops ixp4xx_wdt_restart_only_ops = {
++ .start = ixp4xx_wdt_dummy,
++ .stop = ixp4xx_wdt_dummy,
++ .restart = ixp4xx_wdt_restart,
++ .owner = THIS_MODULE,
++};
++
+ static const struct watchdog_info ixp4xx_wdt_info = {
+ .options = WDIOF_KEEPALIVEPING
+ | WDIOF_MAGICCLOSE
+@@ -114,14 +133,17 @@ static const struct watchdog_info ixp4xx_wdt_info = {
+
+ static int ixp4xx_wdt_probe(struct platform_device *pdev)
+ {
++ static const struct watchdog_ops *iwdt_ops;
+ struct device *dev = &pdev->dev;
+ struct ixp4xx_wdt *iwdt;
+ struct clk *clk;
+ int ret;
+
+ if (!(read_cpuid_id() & 0xf) && !cpu_is_ixp46x()) {
+- dev_err(dev, "Rev. A0 IXP42x CPU detected - watchdog disabled\n");
+- return -ENODEV;
++ dev_err(dev, "Rev. A0 IXP42x CPU detected - only restart supported\n");
++ iwdt_ops = &ixp4xx_wdt_restart_only_ops;
++ } else {
++ iwdt_ops = &ixp4xx_wdt_ops;
+ }
+
+ iwdt = devm_kzalloc(dev, sizeof(*iwdt), GFP_KERNEL);
+@@ -141,7 +163,7 @@ static int ixp4xx_wdt_probe(struct platform_device *pdev)
+ iwdt->rate = IXP4XX_TIMER_FREQ;
+
+ iwdt->wdd.info = &ixp4xx_wdt_info;
+- iwdt->wdd.ops = &ixp4xx_wdt_ops;
++ iwdt->wdd.ops = iwdt_ops;
+ iwdt->wdd.min_timeout = 1;
+ iwdt->wdd.max_timeout = U32_MAX / iwdt->rate;
+ iwdt->wdd.parent = dev;
+--
+2.41.0
+
This brings back USRobotics USR8200 support to the IXP4xx target. Signed-off-by: Linus Walleij <linus.walleij@linaro.org> --- .../linux/ixp4xx/base-files/etc/board.d/02_network | 5 + target/linux/ixp4xx/config-6.1 | 1 + target/linux/ixp4xx/image/Makefile | 14 ++ ...p4xx-Handle-clock-output-on-pin-14-and-15.patch | 98 ++++++++ ...003-rtc-rtc7301-Support-byte-addressed-IO.patch | 93 +++++++ ...ixp4xx-Add-USRobotics-USR8200-device-tree.patch | 268 +++++++++++++++++++++ ...5-net-ixp4xx_eth-Support-changing-the-MTU.patch | 135 +++++++++++ ...06-net-phy-amd-Support-the-Altima-AMI101L.patch | 89 +++++++ ...dog-ixp4xx-Make-sure-restart-always-works.patch | 84 +++++++ 9 files changed, 787 insertions(+)