ar71xx: add support for Samsung WAM250

Samsung WAM250 is a dual-band (selectable, not simultaneous) wireless
hub, dedicated for Samsung Shape Wireless Audio System. The device is
based on Atheros AR9344. FCC ID: A3LWAM250.

Specification:

- 560/450/225 MHz (CPU/DDR/AHB)
- 64 MB of RAM (DDR2)
- 16 MB of FLASH (SPI NOR)
- 2x 10/100 Mbps Ethernet
- 2T2R 2.4/5 GHz (AR9344), with ext. PA (SE2598L, SE5003L) and LNA
- 1x USB 2.0
- 4x LED (all are driven by GPIO)
- 2x button (reset, wps/speaker add)
- DC jack for main power input (14 V)
- UART header on PCB (J4, RX: 3, TX: 5)

Flash instruction:

This device uses dual-image (switched between upgrades) with a common
jffs2 config partition. Fortunately, there is a way to disable this mode
so that more flash space can be used by OpenWrt image.

You can easily access this device over telnet, using root/root
credentials (the same also work for serial console access).

1. Make sure that your device uses second (bootpart=2) image using
   command: "fw_printenv bootpart".
2. If your device uses first image (bootpart=1), perform upgrade to the
   latest vendor firmware (after the update, device should boot from
   second partition) using web gui (default login: admin/1234567890).
3. Rename "sysupgrade" image to "firmware.bin", download it (you can use
   wget, tftp or ftpget) to "/tmp" and issue below commands:

   mtd_debug erase /dev/mtd3 0 $(wc -c /tmp/firmware.bin | awk -F' ' '{print $1}')
   mtd_debug write /dev/mtd3 0 $(wc -c /tmp/firmware.bin)
   fw_setenv bootpart
   fw_setenv bootcmd "bootm 0x9f070000"
   reboot

Revert to vendor firmware instruction:

1. Download vendor firmware to "/tmp" device and issue below commands:

   fw_setenv bootpart 1
   sysupgrade -n -F SS_BHUB_v2.2.05.bin

Signed-off-by: Piotr Dymacz <pepe2k@gmail.com>

target/linux/ar71xx/base-files/etc/board.d/01_leds

@@ -910,6 +910,10 @@ tube2h)
 	ucidef_set_led_rssi "signal3" "SIGNAL3" "alfa:green:signal3" "wlan0" "51" "100" "-50" "13"
 	ucidef_set_led_rssi "signal4" "SIGNAL4" "alfa:green:signal4" "wlan0" "76" "100" "-75" "13"
 	;;
+wam250)
+	ucidef_set_led_netdev "lan" "LAN" "$board:white:lan" "eth0"
+	ucidef_set_led_wlan "wlan" "WLAN" "$board:white:wlan" "phy0tpt"
+	;;
 wndap360)
 	ucidef_set_led_power "power" "POWER GREEN" "netgear:green:power" "1"
 	;;

target/linux/ar71xx/base-files/etc/diag.sh

@@ -236,7 +236,8 @@ get_status_led() {
 		;;
 	gl-ar750|\
 	hiveap-121|\
-	nbg6716)
+	nbg6716|\
+	wam250)
 		status_led="$board:white:power"
 		;;
 	hiwifi-hc6361)

target/linux/ar71xx/base-files/lib/ar71xx.sh

@@ -1298,6 +1298,9 @@ ar71xx_board_detect() {
 	*"UniFiAP Outdoor+")
 		name="unifi-outdoor-plus"
 		;;
+	*"WAM250")
+		name="wam250"
+		;;
 	*"WBS210")
 		name="wbs210"
 		tplink_pharos_board_detect

target/linux/ar71xx/base-files/lib/upgrade/platform.sh

@@ -286,6 +286,7 @@ platform_check_image() {
 	unifi-outdoor|\
 	unifiac-lite|\
 	unifiac-pro|\
+	wam250|\
 	weio|\
 	whr-g301n|\
 	whr-hp-g300n|\

target/linux/ar71xx/config-4.4

@@ -234,6 +234,7 @@ CONFIG_ATH79=y
 # CONFIG_ATH79_MACH_UBNT is not set
 # CONFIG_ATH79_MACH_UBNT_UNIFIAC is not set
 # CONFIG_ATH79_MACH_UBNT_XM is not set
+# CONFIG_ATH79_MACH_WAM250 is not set
 # CONFIG_ATH79_MACH_WEIO is not set
 # CONFIG_ATH79_MACH_WHR_HP_G300N is not set
 # CONFIG_ATH79_MACH_WI2A_AC200I is not set

target/linux/ar71xx/config-4.9

@@ -232,6 +232,7 @@ CONFIG_ATH79=y
 # CONFIG_ATH79_MACH_UBNT is not set
 # CONFIG_ATH79_MACH_UBNT_UNIFIAC is not set
 # CONFIG_ATH79_MACH_UBNT_XM is not set
+# CONFIG_ATH79_MACH_WAM250 is not set
 # CONFIG_ATH79_MACH_WEIO is not set
 # CONFIG_ATH79_MACH_WHR_HP_G300N is not set
 # CONFIG_ATH79_MACH_WI2A_AC200I is not set

target/linux/ar71xx/files/arch/mips/ath79/Kconfig.openwrt

@@ -948,6 +948,16 @@ config ATH79_MACH_JWAP230
 	select ATH79_DEV_USB
 	select ATH79_DEV_WMAC
 
+config ATH79_MACH_WAM250
+	bool "Samsung WAM250 support"
+	select SOC_AR934X
+	select ATH79_DEV_ETH
+	select ATH79_DEV_GPIO_BUTTONS
+	select ATH79_DEV_LEDS_GPIO
+	select ATH79_DEV_M25P80
+	select ATH79_DEV_USB
+	select ATH79_DEV_WMAC
+
 config ATH79_MACH_WRT160NL
 	bool "Linksys WRT160NL board support"
 	select SOC_AR913X

target/linux/ar71xx/files/arch/mips/ath79/Makefile

@@ -242,6 +242,7 @@ obj-$(CONFIG_ATH79_MACH_TUBE2H)			+= mach-tube2h.o
 obj-$(CONFIG_ATH79_MACH_UBNT)			+= mach-ubnt.o
 obj-$(CONFIG_ATH79_MACH_UBNT_UNIFIAC)		+= mach-ubnt-unifiac.o
 obj-$(CONFIG_ATH79_MACH_UBNT_XM)		+= mach-ubnt-xm.o
+obj-$(CONFIG_ATH79_MACH_WAM250)			+= mach-wam250.o
 obj-$(CONFIG_ATH79_MACH_WEIO)			+= mach-weio.o
 obj-$(CONFIG_ATH79_MACH_WHR_HP_G300N)		+= mach-whr-hp-g300n.o
 obj-$(CONFIG_ATH79_MACH_WLAE_AG300N)		+= mach-wlae-ag300n.o

target/linux/ar71xx/files/arch/mips/ath79/mach-wam250.c

@@ -0,0 +1,122 @@
+/*
+ * Samsung WAM250 board support
+ *
+ * Copyright (C) 2018 Piotr Dymacz <pepe2k@gmail.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published
+ * by the Free Software Foundation.
+ */
+
+#include <linux/gpio.h>
+#include <linux/platform_device.h>
+
+#include <asm/mach-ath79/ath79.h>
+#include <asm/mach-ath79/ar71xx_regs.h>
+
+#include "common.h"
+#include "dev-eth.h"
+#include "dev-gpio-buttons.h"
+#include "dev-leds-gpio.h"
+#include "dev-m25p80.h"
+#include "dev-usb.h"
+#include "dev-wmac.h"
+#include "machtypes.h"
+
+#define WAM250_GPIO_LED_LAN		13
+#define WAM250_GPIO_LED_POWER		15
+#define WAM250_GPIO_LED_REPEATER	14
+#define WAM250_GPIO_LED_WLAN		12
+
+#define WAM250_GPIO_BTN_RESET		17
+#define WAM250_GPIO_BTN_SPKADD		1
+
+#define WAM250_GPIO_EXT_LNA		19
+
+#define WAM250_MAC_OFFSET		2
+
+#define WAM250_KEYS_POLL_INTERVAL	20
+#define WAM250_KEYS_DEBOUNCE_INTERVAL	(3 * WAM250_KEYS_POLL_INTERVAL)
+
+static struct gpio_led wam250_leds_gpio[] __initdata = {
+	{
+		.name		= "wam250:white:lan",
+		.gpio		= WAM250_GPIO_LED_LAN,
+		.active_low	= 1,
+	}, {
+		.name		= "wam250:white:power",
+		.gpio		= WAM250_GPIO_LED_POWER,
+		.default_state	= LEDS_GPIO_DEFSTATE_KEEP,
+		.active_low	= 1,
+	}, {
+		.name		= "wam250:white:repeater",
+		.gpio		= WAM250_GPIO_LED_REPEATER,
+		.active_low	= 1,
+	}, {
+		.name		= "wam250:white:wlan",
+		.gpio		= WAM250_GPIO_LED_WLAN,
+		.active_low	= 1,
+	},
+};
+
+static struct gpio_keys_button wam250_gpio_keys[] __initdata = {
+	{
+		.desc			= "reset",
+		.type			= EV_KEY,
+		.code			= KEY_RESTART,
+		.debounce_interval	= WAM250_KEYS_DEBOUNCE_INTERVAL,
+		.gpio			= WAM250_GPIO_BTN_RESET,
+		.active_low		= 1,
+	}, {
+		.desc			= "wps",
+		.type			= EV_KEY,
+		.code			= KEY_WPS_BUTTON,
+		.debounce_interval	= WAM250_KEYS_DEBOUNCE_INTERVAL,
+		.gpio			= WAM250_GPIO_BTN_SPKADD,
+		.active_low		= 1,
+	},
+};
+
+static void __init wam250_setup(void)
+{
+	u8 *art = (u8 *) KSEG1ADDR(0x1fff1000);
+
+	ath79_register_m25p80(NULL);
+
+	ath79_register_mdio(1, 0x0);
+
+	ath79_setup_ar934x_eth_cfg(AR934X_ETH_CFG_SW_PHY_SWAP);
+
+	ath79_switch_data.phy4_mii_en = 1;
+	ath79_switch_data.phy_poll_mask = 0xfd;
+
+	/* LAN */
+	ath79_eth1_data.duplex = DUPLEX_FULL;
+	ath79_eth1_data.phy_if_mode = PHY_INTERFACE_MODE_GMII;
+	ath79_eth1_data.phy_mask = BIT(1);
+	ath79_init_mac(ath79_eth1_data.mac_addr, art + WAM250_MAC_OFFSET, 0);
+	ath79_register_eth(1);
+
+	/* WAN */
+	ath79_eth0_data.duplex = DUPLEX_FULL;
+	ath79_eth0_data.mii_bus_dev = &ath79_mdio1_device.dev;
+	ath79_eth0_data.phy_if_mode = PHY_INTERFACE_MODE_MII;
+	ath79_eth0_data.phy_mask = BIT(0);
+	ath79_eth0_data.speed = SPEED_100;
+	ath79_init_mac(ath79_eth0_data.mac_addr, art + WAM250_MAC_OFFSET, 1);
+	ath79_register_eth(0);
+
+	ath79_register_leds_gpio(-1, ARRAY_SIZE(wam250_leds_gpio),
+				 wam250_leds_gpio);
+
+	ath79_register_gpio_keys_polled(-1, WAM250_KEYS_POLL_INTERVAL,
+					ARRAY_SIZE(wam250_gpio_keys),
+					wam250_gpio_keys);
+
+	ath79_wmac_set_ext_lna_gpio(0, WAM250_GPIO_EXT_LNA);
+
+	ath79_register_usb();
+	ath79_register_wmac(art, NULL);
+}
+
+MIPS_MACHINE(ATH79_MACH_WAM250, "WAM250", "Samsung WAM250", wam250_setup);

target/linux/ar71xx/files/arch/mips/ath79/machtypes.h

@@ -315,6 +315,7 @@ enum ath79_mach_type {
 	ATH79_MACH_UBNT_UNIFI_OUTDOOR,		/* Ubiquiti UnifiAP Outdoor */
 	ATH79_MACH_UBNT_UNIFI_OUTDOOR_PLUS,	/* Ubiquiti UnifiAP Outdoor+ */
 	ATH79_MACH_UBNT_XM,			/* Ubiquiti Networks XM board rev 1.0 */
+	ATH79_MACH_WAM250,			/* Samsung WAM250 */
 	ATH79_MACH_WBS210,			/* TP-LINK WBS210 */
 	ATH79_MACH_WBS510,			/* TP-LINK WBS510 */
 	ATH79_MACH_WEIO,			/* WeIO board */

target/linux/ar71xx/generic/config-default

@@ -165,6 +165,7 @@ CONFIG_ATH79_MACH_TUBE2H=y
 CONFIG_ATH79_MACH_UBNT=y
 CONFIG_ATH79_MACH_UBNT_UNIFIAC=y
 CONFIG_ATH79_MACH_UBNT_XM=y
+CONFIG_ATH79_MACH_WAM250=y
 CONFIG_ATH79_MACH_WEIO=y
 CONFIG_ATH79_MACH_WHR_HP_G300N=y
 CONFIG_ATH79_MACH_WLAE_AG300N=y

target/linux/ar71xx/image/generic.mk

@@ -1101,6 +1101,18 @@ define Device/bhr-4grv2
 endef
 TARGET_DEVICES += bhr-4grv2
 
+define Device/wam250
+  DEVICE_TITLE := Samsung WAM250
+  DEVICE_PACKAGES := kmod-usb-core kmod-usb2 -swconfig
+  BOARDNAME := WAM250
+  IMAGE_SIZE := 15872k
+  MTDPARTS := spi0.0:256k(u-boot)ro,64k(u-boot-env),128k(nvram)ro,15872k(firmware),64k(art)ro
+  SUPPORTED_DEVICES := wam250
+  IMAGE/sysupgrade.bin := append-kernel | pad-to $$$$(BLOCKSIZE) |\
+	append-rootfs | pad-rootfs | append-metadata | check-size $$$$(IMAGE_SIZE)
+endef
+TARGET_DEVICES += wam250
+
 define Device/wlr8100
   DEVICE_TITLE := Sitecom WLR-8100
   DEVICE_PACKAGES := kmod-usb-core kmod-usb2 kmod-usb-ledtrig-usbport kmod-usb3 \