ar71xx: add support for TP-Link RE450

Add full support for TP-Link RE450.
The wireless SoC is similiar to Archer C7: QCA9558 + QCA9880 (pci).
The ethernet interface is AR8035, but the mdio is connected to the gpio and
the chipset builtin mdio bus isn't used, which is unique (and weird), so the
kernel gpio mdio module is used.
The two ethernet leds are connected to the GPIO, so they are both configured,
one to indicate link status and the other to indicate data transfer.

The generation of the image was added to the image Makefile.
The return value of tplink-safeloader is not ignored anymore (to fail on error)

The result factory image is flashable from the stock web ui.

Signed-off-by: Tal Keren <kooolk@gmail.com>
[rd@radekdostal.com: ar71xx: RE450: do not build RE450 for nand]
Signed-off-by: Radek Dostál <rd@radekdostal.com>
[hyniu@o2.pl: ar71xx: RE450: Renaming LED accordance with the standard]
Signed-off-by: Henryk Heisig <hyniu@o2.pl>
[jo@mein.io: squash fixes from Radek and Henryk into original commit]
Signed-off-by: Jo-Philipp Wich <jo@mein.io>

4 files changed, 199 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 5bfb1624ba..21d6b51897 100644
--- a/target/linux/ar71xx/files/arch/mips/ath79/Kconfig.openwrt
+++ b/target/linux/ar71xx/files/arch/mips/ath79/Kconfig.openwrt
@@ -1103,6 +1103,16 @@ config ATH79_MACH_MZK_W300NH
 	select ATH79_DEV_M25P80
 	select ATH79_DEV_WMAC
 
+config ATH79_MACH_RE450
+	bool "TP-LINK RE450 board support"
+	select SOC_QCA955X
+	select ATH79_DEV_AP9X_PCI if PCI
+	select ATH79_DEV_ETH
+	select ATH79_DEV_GPIO_BUTTONS
+	select ATH79_DEV_LEDS_GPIO
+	select ATH79_DEV_M25P80
+	select ATH79_DEV_WMAC
+
 config ATH79_MACH_RW2458N
 	bool "Redwave RW2458N board support"
 	select SOC_AR724X
diff --git a/target/linux/ar71xx/files/arch/mips/ath79/Makefile b/target/linux/ar71xx/files/arch/mips/ath79/Makefile
index 3065701693..6384c0604c 100644
--- a/target/linux/ar71xx/files/arch/mips/ath79/Makefile
+++ b/target/linux/ar71xx/files/arch/mips/ath79/Makefile
@@ -149,6 +149,7 @@ obj-$(CONFIG_ATH79_MACH_RB91X)			+= mach-rb91x.o
 obj-$(CONFIG_ATH79_MACH_RB922)			+= mach-rb922.o
 obj-$(CONFIG_ATH79_MACH_RB95X)			+= mach-rb95x.o
 obj-$(CONFIG_ATH79_MACH_RBSXTLITE)		+= mach-rbsxtlite.o
+obj-$(CONFIG_ATH79_MACH_RE450)			+= mach-re450.o
 obj-$(CONFIG_ATH79_MACH_RW2458N)		+= mach-rw2458n.o
 obj-$(CONFIG_ATH79_MACH_SMART_300)		+= mach-smart-300.o
 obj-$(CONFIG_ATH79_MACH_SOM9331)		+= mach-som9331.o
diff --git a/target/linux/ar71xx/files/arch/mips/ath79/mach-re450.c b/target/linux/ar71xx/files/arch/mips/ath79/mach-re450.c
new file mode 100644
index 0000000000..25de6e729f
--- /dev/null
+++ b/target/linux/ar71xx/files/arch/mips/ath79/mach-re450.c
@@ -0,0 +1,187 @@
+/*
+ * TP-LINK Archer RE450 board support
+ *
+ * Copyright (c) 2013 Gabor Juhos <juhosg@openwrt.org>
+ * Copyright (c) 2016 Tal Keren <kooolk@gmail.com>
+ *
+ * Based on the Qualcomm Atheros AP135/AP136 reference board support code
+ *   Copyright (c) 2012 Qualcomm Atheros
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ *
+ */
+
+#include <linux/pci.h>
+#include <linux/phy.h>
+#include <linux/gpio.h>
+#include <linux/platform_data/mdio-gpio.h>
+#include <linux/platform_device.h>
+#include <linux/ar8216_platform.h>
+
+#include <asm/mach-ath79/ath79.h>
+#include <asm/mach-ath79/ar71xx_regs.h>
+
+#include "common.h"
+#include "dev-ap9x-pci.h"
+#include "dev-eth.h"
+#include "dev-gpio-buttons.h"
+#include "dev-leds-gpio.h"
+#include "dev-m25p80.h"
+#include "dev-wmac.h"
+#include "machtypes.h"
+#include "pci.h"
+
+#define RE450_GPIO_LED_SYSTEM		12
+#define RE450_GPIO_LED_WLAN2G		13
+#define RE450_GPIO_LED_WLAN5G		14
+#define RE450_GPIO_LED_LAN_DATA		17
+#define RE450_GPIO_LED_JUMPSTART	21
+#define RE450_GPIO_LED_JUMPSTART_RED	22
+#define RE450_GPIO_LED_LAN_LINK		23
+
+#define RE450_GPIO_BTN_RESET		18
+#define RE450_GPIO_BTN_LED		19
+#define RE450_GPIO_BTN_JUMPSTART	20
+
+#define RE450_GPIO_SMI_MDIO		1
+#define RE450_GPIO_SMI_MDC		3
+
+#define RE450_LAN_PHYADDR		4
+
+#define RE450_KEYS_POLL_INTERVAL	20	/* msecs */
+#define RE450_KEYS_DEBOUNCE_INTERVAL (3 * RE450_KEYS_POLL_INTERVAL)
+
+#define RE450_WMAC_CALDATA_OFFSET	0x1000
+
+static const char *tl_re450_part_probes[] = {
+	"cmdlinepart",
+	NULL,
+};
+
+static struct flash_platform_data tl_re450_flash_data = {
+	.part_probes	= tl_re450_part_probes,
+};
+
+static struct gpio_led re450_leds_gpio[] __initdata = {
+	{
+		.name		= "re450:blue:power",
+		.gpio		= RE450_GPIO_LED_SYSTEM,
+		.active_low	= 1,
+	},
+	{
+		.name		= "re450:blue:wlan2g",
+		.gpio		= RE450_GPIO_LED_WLAN2G,
+		.active_low	= 1,
+	},
+	{
+		.name		= "re450:blue:wlan5g",
+		.gpio		= RE450_GPIO_LED_WLAN5G,
+		.active_low	= 1,
+	},
+	{
+		.name		= "re450:blue:wps",
+		.gpio		= RE450_GPIO_LED_JUMPSTART,
+	},
+	{
+		.name		= "re450:red:wps",
+		.gpio		= RE450_GPIO_LED_JUMPSTART_RED,
+	},
+	{
+		.name		= "re450:green:lan_data",
+		.gpio		= RE450_GPIO_LED_LAN_DATA,
+		.active_low	= 1,
+	},
+	{
+		.name		= "re450:green:lan_link",
+		.gpio		= RE450_GPIO_LED_LAN_LINK,
+		.active_low	= 1,
+	},
+};
+
+static struct gpio_keys_button re450_gpio_keys[] __initdata = {
+	{
+		.desc		= "Reset button",
+		.type		= EV_KEY,
+		.code		= KEY_WPS_BUTTON,
+		.debounce_interval = RE450_KEYS_DEBOUNCE_INTERVAL,
+		.gpio		= RE450_GPIO_BTN_RESET,
+		.active_low	= 1,
+	},
+	{
+		.desc		= "WPS button",
+		.type		= EV_KEY,
+		.code		= KEY_RESTART,
+		.debounce_interval = RE450_KEYS_DEBOUNCE_INTERVAL,
+		.gpio		= RE450_GPIO_BTN_JUMPSTART,
+		.active_low	= 1,
+	},
+	{
+		.desc		= "Control LED button",
+		.type		= EV_KEY,
+		.code		= BTN_0,
+		.debounce_interval = RE450_KEYS_DEBOUNCE_INTERVAL,
+		.gpio		= RE450_GPIO_BTN_LED,
+		.active_low	= 1,
+	},
+};
+
+static struct mdio_gpio_platform_data re450_mdio = {
+	.mdc		= RE450_GPIO_SMI_MDC,
+	.mdio		= RE450_GPIO_SMI_MDIO,
+	.phy_mask	= ~BIT(RE450_LAN_PHYADDR),
+};
+
+static struct platform_device re450_phy_device = {
+	.name	= "mdio-gpio",
+	.id	= 0,
+	.dev	= {
+		.platform_data = &re450_mdio,
+	},
+};
+
+static void __init re450_setup(void)
+{
+	u8 *mac = (u8 *) KSEG1ADDR(0x1f610008);
+	u8 *art = (u8 *) KSEG1ADDR(0x1fff0000);
+	u8 tmpmac[ETH_ALEN];
+
+	ath79_register_m25p80(&tl_re450_flash_data);
+	ath79_register_leds_gpio(-1, ARRAY_SIZE(re450_leds_gpio),
+				 re450_leds_gpio);
+	ath79_register_gpio_keys_polled(-1, RE450_KEYS_POLL_INTERVAL,
+					ARRAY_SIZE(re450_gpio_keys),
+					re450_gpio_keys);
+
+	ath79_init_mac(tmpmac, mac, -1);
+	ath79_register_wmac(art + RE450_WMAC_CALDATA_OFFSET, tmpmac);
+
+	ath79_register_pci();
+
+	/* MDIO Interface */
+	platform_device_register(&re450_phy_device);
+
+	ath79_setup_qca955x_eth_cfg(QCA955X_ETH_CFG_RGMII_EN);
+
+	/* GMAC0 is connected to the RGMII interface to an Atheros AR8035-A */
+	ath79_init_mac(ath79_eth0_data.mac_addr, mac, 0);
+	ath79_eth0_data.mii_bus_dev = &re450_phy_device.dev;
+	ath79_eth0_data.phy_if_mode = PHY_INTERFACE_MODE_RGMII;
+	ath79_eth0_data.phy_mask = BIT(RE450_LAN_PHYADDR);
+	ath79_eth0_pll_data.pll_1000 = 0xa6000000;
+	ath79_eth0_pll_data.pll_100 = 0xa0000101;
+	ath79_eth0_pll_data.pll_10 = 0x80001313;
+	ath79_register_eth(0);
+}
+
+MIPS_MACHINE(ATH79_MACH_RE450, "RE450", "TP-LINK RE450",
+	     re450_setup)
diff --git a/target/linux/ar71xx/files/arch/mips/ath79/machtypes.h b/target/linux/ar71xx/files/arch/mips/ath79/machtypes.h
index 6ead9117eb..d18a71cf38 100644
--- a/target/linux/ar71xx/files/arch/mips/ath79/machtypes.h
+++ b/target/linux/ar71xx/files/arch/mips/ath79/machtypes.h
@@ -166,6 +166,7 @@ enum ath79_mach_type {
 	ATH79_MACH_RB_951U,			/* Mikrotik RouterBOARD 951Ui-2HnD */
 	ATH79_MACH_RB_SXTLITE2ND,		/* Mikrotik RouterBOARD SXT Lite 2nD */
 	ATH79_MACH_RB_SXTLITE5ND,		/* Mikrotik RouterBOARD SXT Lite 5nD */
+	ATH79_MACH_RE450,			/* TP-LINK RE450 */
 	ATH79_MACH_RW2458N,			/* Redwave RW2458N */
 	ATH79_MACH_SMART_300,			/* NC-LINK SMART-300 */
 	ATH79_MACH_SOM9331,			/* OpenEmbed SOM9331 */