ar71xx: add support for Fritz!WLAN Repeater 450E

This commit adds support for the AVM Fritz!WLAN Repeater 450E

SOC:    Qualcomm QCA9556 (Scorpion) 560MHz MIPS74Kc
RAM:    64MB Zentel A3R12E40CBF DDR2
FLASH:  16MiB Winbond W25Q128 SPI NOR
WLAN1:  QCA9556 2.4 GHz 802.11b/g/n 3x3
INPUT:  WPS button
LED:    Power, WiFi, LAN, RSSI indicator
Serial: Header Next to Black metal shield
        Pinout is 3.3V - RX - TX - GND (Square Pad is 3.3V)
        The Serial setting is 115200-8-N-1.

Tested and working:
 - Ethernet
 - 2.4GHz WiFi (correct MAC)
 - Installation via EVA bootloader
 - OpenWRT sysupgrade
 - Buttons
 - Most LEDs

Not working:
 - 2 RSSI LEDs
   AVM used for RSSI{0,1} two of the Ethernet PHYs LEDs which they
   control over MDIO. Our driver doesn't expose these LEDs as GPIOs.
   While it is possible to implement this feature, it would require an
   additional kernel patch for a minor functionality.

Installation via EVA:
In the first seconds after Power is connected, the bootloader will
listen for FTP connections on 192.168.178.1. Firmware can be uploaded
like following:

  ftp> quote USER adam2
  ftp> quote PASS adam2
  ftp> binary
  ftp> debug
  ftp> passive
  ftp> quote MEDIA FLSH
  ftp> put openwrt-sysupgrade.bin mtd1

Note that this procedure might take up to two minutes.
You need to powercycle the Device afterwards to boot OpenWRT.

Signed-off-by: David Bauer <mail@david-bauer.net>

4 files changed, 188 insertions, 0 deletions

diff --git a/target/linux/ar71xx/files/arch/mips/ath79/Kconfig.openwrt b/target/linux/ar71xx/files/arch/mips/ath79/Kconfig.openwrt
index 72b3fe0aea..153569b9ca 100644
--- a/target/linux/ar71xx/files/arch/mips/ath79/Kconfig.openwrt
+++ b/target/linux/ar71xx/files/arch/mips/ath79/Kconfig.openwrt
@@ -2387,3 +2387,12 @@ config ATH79_MACH_FRITZ4020
 	select ATH79_DEV_LEDS_GPIO
 	select ATH79_DEV_USB
 	select ATH79_DEV_M25P80
+
+config ATH79_MACH_FRITZ450E
+	bool "AVM FRITZ!WLAN Repeater 450E support"
+	select SOC_QCA955X
+	select ATH79_DEV_ETH
+	select ATH79_DEV_GPIO_BUTTONS
+	select ATH79_DEV_LEDS_GPIO
+	select ATH79_DEV_M25P80
+	select ATH79_DEV_WMAC
diff --git a/target/linux/ar71xx/files/arch/mips/ath79/Makefile b/target/linux/ar71xx/files/arch/mips/ath79/Makefile
index cdd1d40c96..6b6874a48e 100644
--- a/target/linux/ar71xx/files/arch/mips/ath79/Makefile
+++ b/target/linux/ar71xx/files/arch/mips/ath79/Makefile
@@ -126,6 +126,7 @@ obj-$(CONFIG_ATH79_MACH_EW_DORIN)		+= mach-ew-dorin.o
 obj-$(CONFIG_ATH79_MACH_F9K1115V2)		+= mach-f9k1115v2.o
 obj-$(CONFIG_ATH79_MACH_FRITZ300E)		+= mach-fritz300e.o
 obj-$(CONFIG_ATH79_MACH_FRITZ4020)		+= mach-fritz4020.o
+obj-$(CONFIG_ATH79_MACH_FRITZ450E)		+= mach-fritz450e.o
 obj-$(CONFIG_ATH79_MACH_GL_AR150)		+= mach-gl-ar150.o
 obj-$(CONFIG_ATH79_MACH_GL_AR300)		+= mach-gl-ar300.o
 obj-$(CONFIG_ATH79_MACH_GL_AR300M)		+= mach-gl-ar300m.o
diff --git a/target/linux/ar71xx/files/arch/mips/ath79/mach-fritz450e.c b/target/linux/ar71xx/files/arch/mips/ath79/mach-fritz450e.c
new file mode 100644
index 0000000000..ee0a185304
--- /dev/null
+++ b/target/linux/ar71xx/files/arch/mips/ath79/mach-fritz450e.c
@@ -0,0 +1,177 @@
+/*
+ *  AVM FRITZ!WLAN Repeater 450E board support
+ *
+ *  Copyright (C) 2018 David Bauer <mail@david-bauer.net>
+ *
+ *  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/init.h>
+#include <linux/ath9k_platform.h>
+#include <linux/etherdevice.h>
+#include <linux/gpio.h>
+#include <linux/platform_device.h>
+
+#include <linux/mtd/mtd.h>
+#include <linux/mtd/partitions.h>
+#include <linux/platform_data/mdio-gpio.h>
+#include <linux/platform_data/phy-at803x.h>
+#include <linux/spi/spi_gpio.h>
+#include <linux/spi/74x164.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-spi.h"
+#include "dev-wmac.h"
+#include "machtypes.h"
+
+#define FRITZ450E_GPIO_LED_POWER		14
+#define FRITZ450E_GPIO_LED_LAN			13
+#define FRITZ450E_GPIO_LED_WLAN			15
+#define FRITZ450E_GPIO_LED_RSSI2			16
+#define FRITZ450E_GPIO_LED_RSSI3			17
+#define FRITZ450E_GPIO_LED_RSSI4			18
+
+#define FRITZ450E_GPIO_BTN_WPS			4
+#define FRITZ450E_KEYS_POLL_INTERVAL		20 /* msecs */
+#define FRITZ450E_KEYS_DEBOUNCE_INTERVAL	(3 * FRITZ450E_KEYS_POLL_INTERVAL)
+
+#define FRITZ450E_PHY_ADDRESS			0
+#define FRITZ450E_GPIO_PHY_RESET		11
+#define FRITZ450E_GPIO_MDIO_CLK		12
+#define FRITZ450E_GPIO_MDIO_DATA		19
+
+#define FRITZ450E_OFFSET_URLADER_WIFI_MAC_REVERSE	0x1979
+
+
+static struct mtd_partition fritz450E_flash_partitions[] = {
+	{
+		.name		= "urlader",
+		.offset		= 0,
+		.size		= 0x0020000,
+		.mask_flags	= MTD_WRITEABLE,
+	}, {
+		.name		= "firmware",
+		.offset		= 0x0020000,
+		.size		= 0x0EE0000,
+	}, {
+		.name		= "tffs (1)",
+		.offset		= 0x0f00000,
+		.size		= 0x0080000,
+		.mask_flags	= MTD_WRITEABLE,
+	}, {
+		.name		= "tffs (2)",
+		.offset		= 0x0f80000,
+		.size		= 0x0080000,
+		.mask_flags	= MTD_WRITEABLE,
+	}
+};
+
+static struct flash_platform_data fritz450E_flash_data = {
+	.parts		= fritz450E_flash_partitions,
+	.nr_parts	= ARRAY_SIZE(fritz450E_flash_partitions),
+};
+
+static struct gpio_led fritz450E_leds_gpio[] __initdata = {
+	{
+		.name		= "fritz450e:green:lan",
+		.gpio		= FRITZ450E_GPIO_LED_LAN,
+		.active_low	= 1,
+	}, {
+		.name		= "fritz450e:green:rssi2",
+		.gpio		= FRITZ450E_GPIO_LED_RSSI2,
+		.active_low	= 1,
+	}, {
+		.name		= "fritz450e:green:rssi3",
+		.gpio		= FRITZ450E_GPIO_LED_RSSI3,
+		.active_low	= 1,
+	}, {
+		.name		= "fritz450e:green:rssi4",
+		.gpio		= FRITZ450E_GPIO_LED_RSSI4,
+		.active_low	= 1,
+	}, {
+		.name		= "fritz450e:green:wlan",
+		.gpio		= FRITZ450E_GPIO_LED_WLAN,
+		.active_low	= 1,
+	}, {
+		.name		= "fritz450e:green:power",
+		.gpio		= FRITZ450E_GPIO_LED_POWER,
+		.active_low	= 0,
+	},
+};
+
+static struct gpio_keys_button fritz450E_gpio_keys[] __initdata = {
+	{
+		.desc			= "WPS Button",
+		.type			= EV_KEY,
+		.code			= KEY_WPS_BUTTON,
+		.debounce_interval	= FRITZ450E_KEYS_DEBOUNCE_INTERVAL,
+		.gpio			= FRITZ450E_GPIO_BTN_WPS,
+		.active_low		= 1,
+	}
+};
+
+static struct at803x_platform_data fritz450E_at803x_data = {
+	.disable_smarteee = 1,
+	.has_reset_gpio = 1,
+	.reset_gpio = FRITZ450E_GPIO_PHY_RESET,
+};
+
+static struct mdio_board_info fritz450E_mdio_info[] = {
+	{
+		.bus_id = "ag71xx-mdio.1",
+		.phy_addr = FRITZ450E_PHY_ADDRESS,
+		.platform_data = &fritz450E_at803x_data,
+	},
+};
+
+static void __init fritz450E_setup(void) {
+	u8 *urlader = (u8 *) KSEG1ADDR(0x1f000000);
+	u8 wifi_mac[ETH_ALEN];
+
+	ath79_register_m25p80(&fritz450E_flash_data);
+
+	gpio_request_one(FRITZ450E_GPIO_MDIO_CLK, GPIOF_OUT_INIT_HIGH, "MDC Pull-UP");
+	gpio_request_one(FRITZ450E_GPIO_MDIO_DATA, GPIOF_OUT_INIT_HIGH, "MDIO Pull-UP");
+	gpio_request_one(FRITZ450E_GPIO_PHY_RESET, GPIOF_OUT_INIT_HIGH, "PHY reset");
+
+	/* Register PHY device */
+	mdiobus_register_board_info(fritz450E_mdio_info,
+				    ARRAY_SIZE(fritz450E_mdio_info));
+
+	/* Initialize Ethernet */
+	ath79_extract_mac_reverse(urlader + FRITZ450E_OFFSET_URLADER_WIFI_MAC_REVERSE, wifi_mac);
+	ath79_init_mac(ath79_eth0_data.mac_addr, wifi_mac, -2);
+
+	ath79_register_mdio(1, ~BIT(FRITZ450E_PHY_ADDRESS));
+	ath79_eth0_data.mii_bus_dev = &ath79_mdio1_device.dev;
+	ath79_eth0_data.phy_if_mode = PHY_INTERFACE_MODE_SGMII;
+	ath79_eth0_data.phy_mask = BIT(FRITZ450E_PHY_ADDRESS);
+	ath79_eth0_pll_data.pll_1000 = 0x03000000;
+	ath79_eth0_pll_data.pll_100 = 0x00000101;
+	ath79_eth0_pll_data.pll_10 = 0x00001313;
+	ath79_register_eth(0);
+
+	/* Initialize 2.4GHz WiFi */
+	ath79_register_wmac_simple();
+
+	/* Register GPIO buttons */
+	ath79_register_gpio_keys_polled(-1, FRITZ450E_KEYS_POLL_INTERVAL,
+					ARRAY_SIZE(fritz450E_gpio_keys),
+					fritz450E_gpio_keys);
+
+	/* Register LEDs */
+	ath79_register_leds_gpio(-1, ARRAY_SIZE(fritz450E_leds_gpio),
+				 fritz450E_leds_gpio);
+}
+
+MIPS_MACHINE(ATH79_MACH_FRITZ450E, "FRITZ450E",
+	     "AVM FRITZ!WLAN Repeater 450E", fritz450E_setup);
diff --git a/target/linux/ar71xx/files/arch/mips/ath79/machtypes.h b/target/linux/ar71xx/files/arch/mips/ath79/machtypes.h
index 3a1f66cefd..d29288e3e7 100644
--- a/target/linux/ar71xx/files/arch/mips/ath79/machtypes.h
+++ b/target/linux/ar71xx/files/arch/mips/ath79/machtypes.h
@@ -121,6 +121,7 @@ enum ath79_mach_type {
 	ATH79_MACH_F9K1115V2,			/* Belkin AC1750DB */
 	ATH79_MACH_FRITZ300E,			/* AVM FRITZ!WLAN Repeater 300E */
 	ATH79_MACH_FRITZ4020,			/* AVM FRITZ!Box 4020 */
+	ATH79_MACH_FRITZ450E,			/* AVM FRITZ!WLAN Repeater 450E */
 	ATH79_MACH_GL_AR150,			/* GL-AR150 support */
 	ATH79_MACH_GL_AR300,			/* GL-AR300 */
 	ATH79_MACH_GL_AR300M,			/* GL-AR300M */