ar71xx: add preliminary kernel support for several RB SPI NOR devices

The cAP 2nD, mAP 2nD and wAP 2nD apparently all share the same QCA953x/SPI-NOR
platform.

This patch adds preliminary kernel support based on init data used in
Mikrotik's linux-3.3.5 kernel patch. Since this is totally experimental and
untested, the necessary glue in base-files has not been added, the code is
provided as a starting point in case somebody with that hardware wants to help
getting it supported.

The cAP lite (cAPL 2nD) should also be supported once it is determined whether
or not it uses the same board identifier as the mAP lite.

Code has been successfully built and has no side effect (no impact on already
supported devices).

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

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

@@ -931,6 +931,9 @@ config ATH79_MACH_RBSPI
 	  MikroTik RouterBOARD hAP
 	  MikroTik RouterBOARD hEX PoE lite
 	  MikroTik RouterBOARD hEX lite
+	  MikroTik RouterBOARD cAP (EXPERIMENTAL)
+	  MikroTik RouterBOARD mAP (EXPERIMENTAL)
+	  MikroTik RouterBOARD wAP (EXPERIMENTAL)
 
 config ATH79_MACH_RBSXTLITE
 	bool "MikroTik RouterBOARD SXT Lite"

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

@@ -7,6 +7,14 @@
  *  - MikroTik RouterBOARD 750UP r2
  *  - MikroTik RouterBOARD 750 r2
  *
+ *  Preliminary support for the following hardware
+ *  - MikroTik RouterBOARD wAP2nD
+ *  - MikroTik RouterBOARD cAP2nD
+ *  - MikroTik RouterBOARD mAP2nD
+ *  Furthermore, the cAP lite (cAPL2nD) appears to feature the exact same
+ *  hardware as the mAP L-2nD. It is unknown if they share the same board
+ *  identifier.
+ *
  *  Copyright (C) 2017 Thibaut VARENE <varenet@parisc-linux.org>
  *
  *  This program is free software; you can redistribute it and/or modify it
@@ -189,6 +197,7 @@ static struct gpio_led rbhapl_leds[] __initdata = {
 #define RB952_GPIO_SSR_CS	11
 #define RB952_GPIO_LED_USER	4
 #define RB952_GPIO_POE_POWER	14
+#define RB952_GPIO_POE_STATUS	12
 #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)
@@ -229,6 +238,103 @@ static struct gpio_led rb952_leds[] __initdata = {
 	},
 };
 
+/* RB wAP-2nD gpios */
+#define RBWAP_GPIO_LED_USER	14
+#define RBWAP_GPIO_LED_WLAN	11
+
+static struct gpio_led rbwap_leds[] __initdata = {
+	{
+		.name = "rb:green:user",
+		.gpio = RBWAP_GPIO_LED_USER,
+		.active_low = 1,
+	}, {
+		.name = "rb:green:wlan",
+		.gpio = RBWAP_GPIO_LED_WLAN,
+		.active_low = 1,
+	},
+};
+
+/* RB cAP-2nD gpios */
+#define RBCAP_GPIO_LED_1	14
+#define RBCAP_GPIO_LED_2	12
+#define RBCAP_GPIO_LED_3	11
+#define RBCAP_GPIO_LED_4	4
+#define RBCAP_GPIO_LED_ALL	13
+
+static struct gpio_led rbcap_leds[] __initdata = {
+	{
+		.name = "rb:green:rssi1",
+		.gpio = RBCAP_GPIO_LED_1,
+		.active_low = 1,
+	}, {
+		.name = "rb:green:rssi2",
+		.gpio = RBCAP_GPIO_LED_2,
+		.active_low = 1,
+	}, {
+		.name = "rb:green:rssi3",
+		.gpio = RBCAP_GPIO_LED_3,
+		.active_low = 1,
+	}, {
+		.name = "rb:green:rssi4",
+		.gpio = RBCAP_GPIO_LED_4,
+		.active_low = 1,
+	},
+};
+
+/* RB mAP-2nD gpios */
+#define RBMAP_SSR_BIT_LED_LAN1	0
+#define RBMAP_SSR_BIT_LED_LAN2	1
+#define RBMAP_SSR_BIT_LED_POEO	2
+#define RBMAP_SSR_BIT_LED_USER	3
+#define RBMAP_SSR_BIT_LED_WLAN	4
+#define RBMAP_SSR_BIT_USB_POWER	5
+#define RBMAP_SSR_BIT_LED_APCAP	6
+#define RBMAP_GPIO_SSR_CS	11
+#define RBMAP_GPIO_LED_POWER	4
+#define RBMAP_GPIO_POE_POWER	14
+#define RBMAP_GPIO_POE_STATUS	12
+#define RBMAP_GPIO_USB_POWER	RBSPI_SSR_GPIO(RBMAP_SSR_BIT_USB_POWER)
+#define RBMAP_GPIO_LED_LAN1	RBSPI_SSR_GPIO(RBMAP_SSR_BIT_LED_LAN1)
+#define RBMAP_GPIO_LED_LAN2	RBSPI_SSR_GPIO(RBMAP_SSR_BIT_LED_LAN2)
+#define RBMAP_GPIO_LED_POEO	RBSPI_SSR_GPIO(RBMAP_SSR_BIT_LED_POEO)
+#define RBMAP_GPIO_LED_USER	RBSPI_SSR_GPIO(RBMAP_SSR_BIT_LED_USER)
+#define RBMAP_GPIO_LED_WLAN	RBSPI_SSR_GPIO(RBMAP_SSR_BIT_LED_WLAN)
+#define RBMAP_GPIO_LED_APCAP	RBSPI_SSR_GPIO(RBMAP_SSR_BIT_LED_APCAP)
+
+static struct gpio_led rbmap_leds[] __initdata = {
+	{
+		.name = "rb:green:power",
+		.gpio = RBMAP_GPIO_LED_POWER,
+		.active_low = 1,
+		.default_state = LEDS_GPIO_DEFSTATE_ON,
+	}, {
+		.name = "rb:green:eth1",
+		.gpio = RBMAP_GPIO_LED_LAN1,
+		.active_low = 1,
+	}, {
+		.name = "rb:green:eth2",
+		.gpio = RBMAP_GPIO_LED_WLAN,
+		.active_low = 1,
+	}, {
+		.name = "rb:red:poe_out",
+		.gpio = RBMAP_GPIO_LED_POEO,
+		.active_low = 1,
+	}, {
+		.name = "rb:green:user",
+		.gpio = RBMAP_GPIO_LED_USER,
+		.active_low = 1,
+	}, {
+		.name = "rb:green:wlan",
+		.gpio = RBMAP_GPIO_LED_WLAN,
+		.active_low = 1,
+	}, {
+		.name = "rb:green:ap_cap",
+		.gpio = RBMAP_GPIO_LED_APCAP,
+		.active_low = 1,
+	},
+};
+
+
 static struct gen_74x164_chip_platform_data rbspi_ssr_data = {
 	.base = RBSPI_SSR_GPIO_BASE,
 };
@@ -492,7 +598,79 @@ static void __init rb750upr2_setup(void)
 	rbspi_952_750r2_setup(flags);
 }
 
+/*
+ * Init the wAP hardware (EXPERIMENTAL).
+ * The wAP 2nD has a single ethernet port.
+ */
+static void __init rbwap_setup(void)
+{
+	u32 flags = RBSPI_HAS_WLAN;
+
+	if (rbspi_platform_setup())
+		return;
+
+	rbspi_peripherals_setup(flags);
+
+	/* GMAC1 is HW MAC, WLAN MAC is HW MAC + 1 */
+	rbspi_network_setup(flags, 0, 1);
+
+	ath79_register_leds_gpio(-1, ARRAY_SIZE(rbwap_leds), rbwap_leds);
+}
+
+/*
+ * Init the cAP hardware (EXPERIMENTAL).
+ * The cAP 2nD has a single ethernet port, and a global LED switch.
+ */
+static void __init rbcap_setup(void)
+{
+	u32 flags = RBSPI_HAS_WLAN;
+
+	if (rbspi_platform_setup())
+		return;
+
+	rbspi_peripherals_setup(flags);
+
+	/* GMAC1 is HW MAC, WLAN MAC is HW MAC + 1 */
+	rbspi_network_setup(flags, 0, 1);
+
+	gpio_request_one(RBCAP_GPIO_LED_ALL,
+			 GPIOF_OUT_INIT_HIGH | GPIOF_EXPORT_DIR_FIXED,
+			 "LEDs enable");
+
+	ath79_register_leds_gpio(-1, ARRAY_SIZE(rbcap_leds), rbcap_leds);
+}
+
+/*
+ * Init the mAP hardware (EXPERIMENTAL).
+ * The mAP 2nD has two ethernet ports, PoE output and an SSR for LED
+ * multiplexing.
+ */
+static void __init rbmap_setup(void)
+{
+	u32 flags = RBSPI_HAS_WLAN | RBSPI_HAS_SSR | RBSPI_HAS_POE;
+
+	if (rbspi_platform_setup())
+		return;
+
+	rbspi_spi_cs_gpios[1] = RBMAP_GPIO_SSR_CS;
+	rbspi_peripherals_setup(flags);
+
+	/* GMAC1 is HW MAC, WLAN MAC is HW MAC + 2 */
+	rbspi_network_setup(flags, 0, 2);
+
+	if (flags & RBSPI_HAS_POE)
+		gpio_request_one(RBMAP_GPIO_POE_POWER,
+				GPIOF_OUT_INIT_HIGH | GPIOF_EXPORT_DIR_FIXED,
+				"POE power");
+
+	ath79_register_leds_gpio(-1, ARRAY_SIZE(rbmap_leds), rbmap_leds);
+}
+
+
 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);
 MIPS_MACHINE_NONAME(ATH79_MACH_RB_750UPR2, "750-hb", rb750upr2_setup);
+MIPS_MACHINE_NONAME(ATH79_MACH_RB_WAP, "wap-hb", rbwap_setup);
+MIPS_MACHINE_NONAME(ATH79_MACH_RB_CAP, "cap-hb", rbcap_setup);
+MIPS_MACHINE_NONAME(ATH79_MACH_RB_MAP, "map2-hb", rbmap_setup);

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

@@ -175,7 +175,10 @@ enum ath79_mach_type {
 	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_CAP,			/* Mikrotik RouterBOARD cAP2nD */
+	ATH79_MACH_RB_MAP,			/* Mikrotik RouterBOARD mAP2nD */
 	ATH79_MACH_RB_MAPL,			/* Mikrotik RouterBOARD mAP L-2nD */
+	ATH79_MACH_RB_WAP,			/* Mikrotik RouterBOARD wAP2nD */
 	ATH79_MACH_RB_SXTLITE2ND,		/* Mikrotik RouterBOARD SXT Lite 2nD */
 	ATH79_MACH_RB_SXTLITE5ND,		/* Mikrotik RouterBOARD SXT Lite 5nD */
 	ATH79_MACH_RE450,			/* TP-LINK RE450 */