From: Linus Walleij Date: Mon, 23 Oct 2023 06:43:09 +0000 (+0200) Subject: ixp4xx: Add USRobotics USR8200 support X-Git-Url: http://git.cdn.openwrt.org/?a=commitdiff_plain;h=5568f47259f10b1a5d599fc382072a88a83d35ef;p=openwrt%2Fstaging%2Fneocturne.git ixp4xx: Add USRobotics USR8200 support This brings back USRobotics USR8200 support to the IXP4xx target. Signed-off-by: Linus Walleij --- diff --git a/target/linux/ixp4xx/base-files/etc/board.d/02_network b/target/linux/ixp4xx/base-files/etc/board.d/02_network index 45d7cbc75a..864328d6bc 100644 --- a/target/linux/ixp4xx/base-files/etc/board.d/02_network +++ b/target/linux/ixp4xx/base-files/etc/board.d/02_network @@ -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" ;; diff --git a/target/linux/ixp4xx/config-6.1 b/target/linux/ixp4xx/config-6.1 index 3b47385d6b..4c4aa11969 100644 --- a/target/linux/ixp4xx/config-6.1 +++ b/target/linux/ixp4xx/config-6.1 @@ -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 diff --git a/target/linux/ixp4xx/image/Makefile b/target/linux/ixp4xx/image/Makefile index 0bcabe2db1..c6d4817c96 100644 --- a/target/linux/ixp4xx/image/Makefile +++ b/target/linux/ixp4xx/image/Makefile @@ -74,4 +74,17 @@ define Device/linksys_nslu2 endef TARGET_DEVICES += linksys_nslu2 +define Device/usrobotics_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 += usrobotics_usr8200 + $(eval $(call BuildImage)) diff --git a/target/linux/ixp4xx/patches-6.1/0002-gpio-ixp4xx-Handle-clock-output-on-pin-14-and-15.patch b/target/linux/ixp4xx/patches-6.1/0002-gpio-ixp4xx-Handle-clock-output-on-pin-14-and-15.patch new file mode 100644 index 0000000000..38adecd64f --- /dev/null +++ b/target/linux/ixp4xx/patches-6.1/0002-gpio-ixp4xx-Handle-clock-output-on-pin-14-and-15.patch @@ -0,0 +1,93 @@ +From fc58944733a2082e3290eda240eb3247a00ad73a Mon Sep 17 00:00:00 2001 +From: Linus Walleij +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 +--- + drivers/gpio/gpio-ixp4xx.c | 49 +++++++++++++++++++++++++++++++++++++- + 1 file changed, 48 insertions(+), 1 deletion(-) + +--- 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 +@@ -203,6 +215,8 @@ static int ixp4xx_gpio_probe(struct plat + 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); +@@ -233,7 +247,40 @@ static int ixp4xx_gpio_probe(struct plat + */ + 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 diff --git a/target/linux/ixp4xx/patches-6.1/0004-ARM-dts-ixp4xx-Add-USRobotics-USR8200-device-tree.patch b/target/linux/ixp4xx/patches-6.1/0004-ARM-dts-ixp4xx-Add-USRobotics-USR8200-device-tree.patch new file mode 100644 index 0000000000..0ae80d170e --- /dev/null +++ b/target/linux/ixp4xx/patches-6.1/0004-ARM-dts-ixp4xx-Add-USRobotics-USR8200-device-tree.patch @@ -0,0 +1,260 @@ +From 02693ffdb93bffcbe772bd91a399dabd123b8c19 Mon Sep 17 00:00:00 2001 +From: Linus Walleij +Date: Tue, 19 Sep 2023 16:02:15 +0200 +Subject: [PATCH 4/4] 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 +--- + 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 + +--- 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 \ +--- /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 ++ ++/ { ++ 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 = ; ++ 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 = <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; ++ }; ++ }; ++ }; ++}; diff --git a/target/linux/ixp4xx/patches-6.1/0005-net-ixp4xx_eth-Support-changing-the-MTU.patch b/target/linux/ixp4xx/patches-6.1/0005-net-ixp4xx_eth-Support-changing-the-MTU.patch new file mode 100644 index 0000000000..4abc6cdbe4 --- /dev/null +++ b/target/linux/ixp4xx/patches-6.1/0005-net-ixp4xx_eth-Support-changing-the-MTU.patch @@ -0,0 +1,132 @@ +From 6599df775e2cbb4988bdf8239acf4fbec70e5ef9 Mon Sep 17 00:00:00 2001 +From: Linus Walleij +Date: Sat, 23 Sep 2023 20:38:22 +0200 +Subject: [PATCH 3/4] 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. + +Reviewed-by: Jacob Keller +Signed-off-by: Linus Walleij +--- + drivers/net/ethernet/xscale/ixp4xx_eth.c | 65 +++++++++++++++++++++++- + 1 file changed, 64 insertions(+), 1 deletion(-) + +--- a/drivers/net/ethernet/xscale/ixp4xx_eth.c ++++ b/drivers/net/ethernet/xscale/ixp4xx_eth.c +@@ -24,6 +24,7 @@ + #include + #include + #include ++#include + #include + #include + #include +@@ -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 +1191,54 @@ static void destroy_queues(struct 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; ++ int framesize, chunks; ++ struct msg msg = {}; ++ ++ /* adjust for ethernet headers */ ++ framesize = new_mtu + VLAN_ETH_HLEN; ++ /* max rx/tx 64 byte chunks */ ++ chunks = DIV_ROUND_UP(framesize, 64); ++ ++ 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 +1289,8 @@ static int eth_open(struct net_device *d + 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 +1433,7 @@ static int eth_close(struct net_device * + 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 +1548,9 @@ static int ixp4xx_eth_probe(struct platf + 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)))) diff --git a/target/linux/ixp4xx/patches-6.1/0007-watchdog-ixp4xx-Make-sure-restart-always-works.patch b/target/linux/ixp4xx/patches-6.1/0007-watchdog-ixp4xx-Make-sure-restart-always-works.patch new file mode 100644 index 0000000000..8eae06deb6 --- /dev/null +++ b/target/linux/ixp4xx/patches-6.1/0007-watchdog-ixp4xx-Make-sure-restart-always-works.patch @@ -0,0 +1,79 @@ +From b09e5ea32e099821b1cddc1e26e625ad994ba11e Mon Sep 17 00:00:00 2001 +From: Linus Walleij +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 +--- +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(-) + +--- a/drivers/watchdog/ixp4xx_wdt.c ++++ b/drivers/watchdog/ixp4xx_wdt.c +@@ -105,6 +105,25 @@ static const struct watchdog_ops ixp4xx_ + .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 +@@ -120,14 +139,17 @@ static void ixp4xx_clock_action(void *d) + + 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); +@@ -153,7 +175,7 @@ static int ixp4xx_wdt_probe(struct platf + 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; diff --git a/target/linux/ixp4xx/patches-6.1/0008-ARM-dts-usr8200-Fix-phy-registers.patch b/target/linux/ixp4xx/patches-6.1/0008-ARM-dts-usr8200-Fix-phy-registers.patch new file mode 100644 index 0000000000..bf056b89a9 --- /dev/null +++ b/target/linux/ixp4xx/patches-6.1/0008-ARM-dts-usr8200-Fix-phy-registers.patch @@ -0,0 +1,67 @@ +From a1ab45966e5a21841af58742adf27725e523d303 Mon Sep 17 00:00:00 2001 +From: Linus Walleij +Date: Sat, 14 Oct 2023 19:53:24 +0200 +Subject: [PATCH] ARM: dts: usr8200: Fix phy registers + +The MV88E6060 switch has internal PHY registers at MDIO +addresses 0x00..0x04. Tie each port to the corresponding +PHY. + +Signed-off-by: Linus Walleij +--- + .../dts/intel-ixp42x-usrobotics-usr8200.dts | 22 +++++++++++++++++++ + 1 file changed, 22 insertions(+) + +--- a/arch/arm/boot/dts/intel-ixp42x-usrobotics-usr8200.dts ++++ b/arch/arm/boot/dts/intel-ixp42x-usrobotics-usr8200.dts +@@ -165,6 +165,24 @@ + #address-cells = <1>; + #size-cells = <0>; + ++ /* ++ * PHY 0..4 are internal to the MV88E6060 switch but appear ++ * as independent devices. ++ */ ++ phy0: ethernet-phy@0 { ++ reg = <0>; ++ }; ++ phy1: ethernet-phy@1 { ++ reg = <1>; ++ }; ++ phy2: ethernet-phy@2 { ++ reg = <2>; ++ }; ++ phy3: ethernet-phy@3 { ++ reg = <3>; ++ }; ++ ++ /* Altima AMI101L used by the WAN port */ + phy9: ethernet-phy@9 { + reg = <9>; + }; +@@ -181,21 +199,25 @@ + port@0 { + reg = <0>; + label = "lan1"; ++ phy-handle = <&phy0>; + }; + + port@1 { + reg = <1>; + label = "lan2"; ++ phy-handle = <&phy1>; + }; + + port@2 { + reg = <2>; + label = "lan3"; ++ phy-handle = <&phy2>; + }; + + port@3 { + reg = <3>; + label = "lan4"; ++ phy-handle = <&phy3>; + }; + + port@5 {