ar71xx: add support for RB951Ui-2nD

This patch adds support for the MikroTik RouterBOARD hAP
https://routerboard.com/RB951Ui-2nD

Specifications:
- SoC: Qualcomm QCA9531 (650MHz)
- RAM: 64MB
- Storage: 16MB NOR SPI flash
- Wireless: builtin QCA9531, 2x2:2
- Ethernet: 5x100M (1 PoE in, 1 PoE out)
- USB: Type A

Signed-off-by: Thibaut VARENE <hacks@slashdirt.org>

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

@@ -225,6 +225,15 @@ rb-750)
 rb-941-2nd)
 	ucidef_set_led_timer "user" "USR/ACT" "rb:green:user" "1000" "1000"
 	;;
+rb-951ui-2nd)
+	ucidef_set_led_timer "user" "USER" "rb:green:user" "1000" "1000"
+	ucidef_set_led_netdev "port1" "port1" "rb:green:port1" "eth0"
+	ucidef_set_led_switch "port2" "port2" "rb:green:port2" "switch0" "0x10"
+	ucidef_set_led_switch "port3" "port2" "rb:green:port3" "switch0" "0x08"
+	ucidef_set_led_switch "port4" "port3" "rb:green:port4" "switch0" "0x04"
+	ucidef_set_led_switch "port5" "port5" "rb:green:port5" "switch0" "0x02"
+	ucidef_set_led_wlan "wlan" "WLAN" "rb:blue:wlan" "phy0tpt"
+	;;
 rb-2011l|\
 rb-2011uas|\
 rb-2011uias|\

target/linux/ar71xx/base-files/etc/board.d/02_network

@@ -137,6 +137,7 @@ ar71xx_setup_interfaces()
 	pb42|\
 	pb44|\
 	rb-951ui-2hnd|\
+	rb-951ui-2nd|\
 	routerstation|\
 	tl-wr710n|\
 	tl-wr720n-v3|\

target/linux/ar71xx/base-files/etc/board.d/03_gpio_switches

@@ -27,6 +27,10 @@ rb-912uag-2hpnd|\
 rb-912uag-5hpnd)
 	ucidef_add_gpio_switch "usb_power_switch" "USB Power Switch" "52" "1"
 	;;
+rb-951ui-2nd)
+	ucidef_add_gpio_switch "usb_power_switch" "USB Power Switch" "45" "1"
+	ucidef_add_gpio_switch "poe_passthrough" "PoE Passthrough" "14"
+	;;
 esac
 
 board_config_flush

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

@@ -299,6 +299,7 @@ get_status_led() {
 	rb-912uag-2hpnd|\
 	rb-912uag-5hpnd|\
 	rb-941-2nd|\
+	rb-951ui-2nd|\
 	rb-mapl-2nd)
 		status_led="rb:green:user"
 		;;

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

@@ -868,6 +868,9 @@ ar71xx_board_detect() {
 	*"RouterBOARD 951Ui-2HnD")
 		name="rb-951ui-2hnd"
 		;;
+	*"951Ui-2nD")
+		name="rb-951ui-2nd"
+		;;
 	*"RouterBOARD 2011L")
 		name="rb-2011l"
 		;;

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

@@ -344,6 +344,7 @@ platform_check_image() {
 	pb42|\
 	pb44|\
 	rb-941-2nd|\
+	rb-951ui-2nd|\
 	rb-mapl-2nd|\
 	routerstation-pro|\
 	routerstation|\
@@ -617,6 +618,7 @@ platform_pre_upgrade() {
 
 	case "$board" in
 	rb-941-2nd|\
+	rb-951ui-2nd|\
 	rb-mapl-2nd)
 		;;
 	rb*|\
@@ -654,6 +656,7 @@ platform_do_upgrade() {
 
 	case "$board" in
 	rb-941-2nd|\
+	rb-951ui-2nd|\
 	rb-mapl-2nd)
 		PLATFORM_DO_UPGRADE_COMBINED_SEPARATE_MTD=1
 		platform_do_upgrade_combined "$ARGV"

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

@@ -921,12 +921,14 @@ config ATH79_MACH_RBSPI
 	select ATH79_DEV_GPIO_BUTTONS
 	select ATH79_DEV_LEDS_GPIO
 	select ATH79_DEV_M25P80
+	select ATH79_DEV_USB
 	select ATH79_DEV_WMAC
 	select ATH79_ROUTERBOOT
 	help
 	  Say 'Y' here if you want your kernel to support the
 	  MikroTik RouterBOARD mAP lite
 	  MikroTik RouterBOARD hAP lite
+	  MikroTik RouterBOARD hAP
 
 config ATH79_MACH_RBSXTLITE
 	bool "MikroTik RouterBOARD SXT Lite"

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

@@ -3,6 +3,7 @@
  *
  *  - MikroTik RouterBOARD mAP L-2nD
  *  - MikroTik RouterBOARD 941L-2nD
+ *  - MikroTik RouterBOARD 951Ui-2nD
  *
  *  Copyright (C) 2017 Thibaut VARENE <varenet@parisc-linux.org>
  *
@@ -16,6 +17,9 @@
 #include <linux/routerboot.h>
 #include <linux/gpio.h>
 
+#include <linux/spi/spi.h>
+#include <linux/spi/74x164.h>
+
 #include <linux/mtd/mtd.h>
 #include <linux/mtd/partitions.h>
 
@@ -40,6 +44,7 @@
 #define RBSPI_HAS_USB		BIT(0)
 #define RBSPI_HAS_WLAN		BIT(1)
 #define RBSPI_HAS_WAN4		BIT(2)	/* has WAN port on PHY4 */
+#define RBSPI_HAS_SSR		BIT(3)	/* has an SSR on SPI bus 0 */
 
 #define RB_ROUTERBOOT_OFFSET    0x0000
 #define RB_BIOS_SIZE            0x1000
@@ -166,6 +171,96 @@ static struct gpio_led rbhapl_leds[] __initdata = {
 	},
 };
 
+/* common RB SSRs */
+#define RBSPI_SSR_GPIO_BASE	40
+#define RBSPI_SSR_GPIO(bit)	(RBSPI_SSR_GPIO_BASE + (bit))
+
+/* RB 951Ui-2nD gpios */
+#define RB952_SSR_BIT_LED_LAN1	0
+#define RB952_SSR_BIT_LED_LAN2	1
+#define RB952_SSR_BIT_LED_LAN3	2
+#define RB952_SSR_BIT_LED_LAN4	3
+#define RB952_SSR_BIT_LED_LAN5	4
+#define RB952_SSR_BIT_USB_POWER	5
+#define RB952_SSR_BIT_LED_WLAN	6
+#define RB952_GPIO_SSR_CS	11
+#define RB952_GPIO_LED_USER	4
+#define RB952_GPIO_POE_POWER	14
+#define RB952_GPIO_USB_POWER	RBSPI_SSR_GPIO(RB952_SSR_BIT_USB_POWER)
+#define RB952_GPIO_LED_LAN1	RBSPI_SSR_GPIO(RB952_SSR_BIT_LED_LAN1)
+#define RB952_GPIO_LED_LAN2	RBSPI_SSR_GPIO(RB952_SSR_BIT_LED_LAN2)
+#define RB952_GPIO_LED_LAN3	RBSPI_SSR_GPIO(RB952_SSR_BIT_LED_LAN3)
+#define RB952_GPIO_LED_LAN4	RBSPI_SSR_GPIO(RB952_SSR_BIT_LED_LAN4)
+#define RB952_GPIO_LED_LAN5	RBSPI_SSR_GPIO(RB952_SSR_BIT_LED_LAN5)
+#define RB952_GPIO_LED_WLAN	RBSPI_SSR_GPIO(RB952_SSR_BIT_LED_WLAN)
+
+static struct gpio_led rb952_leds[] __initdata = {
+	{
+		.name = "rb:green:user",
+		.gpio = RB952_GPIO_LED_USER,
+		.active_low = 0,
+	}, {
+		.name = "rb:blue:wlan",
+		.gpio = RB952_GPIO_LED_WLAN,
+		.active_low = 1,
+	}, {
+		.name = "rb:green:port1",
+		.gpio = RB952_GPIO_LED_LAN1,
+		.active_low = 1,
+	}, {
+		.name = "rb:green:port2",
+		.gpio = RB952_GPIO_LED_LAN2,
+		.active_low = 1,
+	}, {
+		.name = "rb:green:port3",
+		.gpio = RB952_GPIO_LED_LAN3,
+		.active_low = 1,
+	}, {
+		.name = "rb:green:port4",
+		.gpio = RB952_GPIO_LED_LAN4,
+		.active_low = 1,
+	}, {
+		.name = "rb:green:port5",
+		.gpio = RB952_GPIO_LED_LAN5,
+		.active_low = 1,
+	},
+};
+
+static struct gen_74x164_chip_platform_data rbspi_ssr_data = {
+	.base = RBSPI_SSR_GPIO_BASE,
+};
+
+/* the spi-ath79 driver can only natively handle CS0. Other CS are bit-banged */
+static int rbspi_spi_cs_gpios[] = {
+	-ENOENT,	/* CS0 is always -ENOENT: natively handled */
+	-ENOENT,	/* CS1 can be updated by the code as necessary */
+};
+
+static struct ath79_spi_platform_data rbspi_ath79_spi_data = {
+	.bus_num = 0,
+	.cs_gpios = rbspi_spi_cs_gpios,
+};
+
+/*
+ * Global spi_board_info: devices that don't have an SSR only have the SPI NOR
+ * flash on bus0 CS0, while devices that have an SSR add it on the same bus CS1
+ */
+static struct spi_board_info rbspi_spi_info[] = {
+	{
+		.bus_num	= 0,
+		.chip_select	= 0,
+		.max_speed_hz	= 25000000,
+		.modalias	= "m25p80",
+		.platform_data	= &rbspi_spi_flash_data,
+	}, {
+		.bus_num	= 0,
+		.chip_select	= 1,
+		.max_speed_hz	= 25000000,
+		.modalias	= "74x164",
+		.platform_data	= &rbspi_ssr_data,
+	}
+};
+
 void __init rbspi_wlan_init(int wmac_offset)
 {
 	char *art_buf;
@@ -209,7 +304,16 @@ static int __init rbspi_platform_setup(void)
  */
 static void __init rbspi_peripherals_setup(u32 flags)
 {
-	ath79_register_m25p80(&rbspi_spi_flash_data);
+	unsigned spi_n;
+
+	if (flags & RBSPI_HAS_SSR)
+		spi_n = ARRAY_SIZE(rbspi_spi_info);
+	else
+		spi_n = 1;     /* only one device on bus0 */
+
+	rbspi_ath79_spi_data.num_chipselect = spi_n;
+	rbspi_ath79_spi_data.cs_gpios = rbspi_spi_cs_gpios;
+	ath79_register_spi(&rbspi_ath79_spi_data, rbspi_spi_info, spi_n);
 
 	if (flags & RBSPI_HAS_USB)
 		ath79_register_usb();
@@ -314,5 +418,46 @@ static void __init rbhapl_setup(void)
 					rbspi_gpio_keys_reset16);
 }
 
+/*
+ * Init the hAP hardware.
+ * The 951Ui-2nD (hAP) has 5 ethernet ports, with ports 2-5 being assigned
+ * to LAN on the casing, and port 1 being assigned to "internet" (WAN).
+ * Port 1 is connected to PHY4 (the ports are labelled in reverse physical
+ * number), so the SoC can be set to connect GMAC0 to PHY4 and GMAC1 to the
+ * internal switch for the LAN ports.
+ * The device also has USB, PoE output and an SSR used for LED multiplexing.
+ */
+static void __init rb952_setup(void)
+{
+	u32 flags = RBSPI_HAS_WLAN | RBSPI_HAS_WAN4 | RBSPI_HAS_USB |
+			RBSPI_HAS_SSR;
+
+	if (rbspi_platform_setup())
+		return;
+
+	rbspi_spi_cs_gpios[1] = RB952_GPIO_SSR_CS;
+
+	rbspi_peripherals_setup(flags);
+
+	/* GMAC1 is HW MAC + 1, WLAN MAC IS HW MAC + 5 */
+	rbspi_network_setup(flags, 1, 5);
+
+	gpio_request_one(RB952_GPIO_USB_POWER,
+			GPIOF_OUT_INIT_HIGH | GPIOF_EXPORT_DIR_FIXED,
+			"USB power");
+
+	gpio_request_one(RB952_GPIO_POE_POWER,
+			GPIOF_OUT_INIT_HIGH | GPIOF_EXPORT_DIR_FIXED,
+			"POE power");
+
+	ath79_register_leds_gpio(-1, ARRAY_SIZE(rb952_leds), rb952_leds);
+
+	/* hAP has a single reset button as gpio 16 */
+	ath79_register_gpio_keys_polled(-1, RBSPI_KEYS_POLL_INTERVAL,
+					ARRAY_SIZE(rbspi_gpio_keys_reset16),
+					rbspi_gpio_keys_reset16);
+}
+
 MIPS_MACHINE_NONAME(ATH79_MACH_RB_MAPL, "map-hb", rbmapl_setup);
 MIPS_MACHINE_NONAME(ATH79_MACH_RB_941, "H951L", rbhapl_setup);
+MIPS_MACHINE_NONAME(ATH79_MACH_RB_952, "952-hb", rb952_setup);

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

@@ -173,6 +173,7 @@ enum ath79_mach_type {
 	ATH79_MACH_RB_941,			/* MikroTik RouterBOARD 941-2nD */
 	ATH79_MACH_RB_951G,			/* Mikrotik RouterBOARD 951G */
 	ATH79_MACH_RB_951U,			/* Mikrotik RouterBOARD 951Ui-2HnD */
+	ATH79_MACH_RB_952,			/* MikroTik RouterBOARD 951Ui-2nD */
 	ATH79_MACH_RB_MAPL,			/* Mikrotik RouterBOARD mAP L-2nD */
 	ATH79_MACH_RB_SXTLITE2ND,		/* Mikrotik RouterBOARD SXT Lite 2nD */
 	ATH79_MACH_RB_SXTLITE5ND,		/* Mikrotik RouterBOARD SXT Lite 5nD */