mips: ath79: Add support for TPLink WDR4300

Add support for the TPLink WDR4300 router, which is based on the
AR9344 MIPS 74Kc CPU and has 128 MiB of RAM. The USB is supported
on this system as well.

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
Cc: Wills Wang <wills.wang@live.com>

4 files changed, 100 insertions, 0 deletions

diff --git a/board/tplink/wdr4300/Kconfig b/board/tplink/wdr4300/Kconfig
new file mode 100644
index 0000000000..902abf560d
--- /dev/null
+++ b/board/tplink/wdr4300/Kconfig
@@ -0,0 +1,15 @@
+if BOARD_TPLINK_WDR4300
+
+config SYS_VENDOR
+	default "tplink"
+
+config SYS_SOC
+	default "ath79"
+
+config SYS_BOARD
+	default "wdr4300"
+
+config SYS_CONFIG_NAME
+	default "tplink_wdr4300"
+
+endif
diff --git a/board/tplink/wdr4300/MAINTAINERS b/board/tplink/wdr4300/MAINTAINERS
new file mode 100644
index 0000000000..db239c291a
--- /dev/null
+++ b/board/tplink/wdr4300/MAINTAINERS
@@ -0,0 +1,6 @@
+TPLINK_WDR4300 BOARD
+M:	Marek Vasut <marex@denx.de>
+S:	Maintained
+F:	board/tplink/wdr4300/
+F:	include/configs/tplink_wdr4300.h
+F:	configs/tplink_wdr4300_defconfig
diff --git a/board/tplink/wdr4300/Makefile b/board/tplink/wdr4300/Makefile
new file mode 100644
index 0000000000..4f0c296628
--- /dev/null
+++ b/board/tplink/wdr4300/Makefile
@@ -0,0 +1,5 @@
+#
+# SPDX-License-Identifier:	GPL-2.0+
+#
+
+obj-y	= wdr4300.o
diff --git a/board/tplink/wdr4300/wdr4300.c b/board/tplink/wdr4300/wdr4300.c
new file mode 100644
index 0000000000..6e070fd558
--- /dev/null
+++ b/board/tplink/wdr4300/wdr4300.c
@@ -0,0 +1,74 @@
+/*
+ * Copyright (C) 2016 Marek Vasut <marex@denx.de>
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <common.h>
+#include <asm/io.h>
+#include <asm/addrspace.h>
+#include <asm/types.h>
+#include <mach/ath79.h>
+#include <mach/ar71xx_regs.h>
+#include <mach/ddr.h>
+#include <debug_uart.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+#ifdef CONFIG_USB
+static void wdr4300_usb_start(void)
+{
+	void __iomem *gpio_regs = map_physmem(AR71XX_GPIO_BASE,
+					      AR71XX_GPIO_SIZE, MAP_NOCACHE);
+	if (!gpio_regs)
+		return;
+
+	/* Power up the USB HUB. */
+	clrbits_be32(gpio_regs + AR71XX_GPIO_REG_OE, BIT(21) | BIT(22));
+	writel(BIT(21) | BIT(22), gpio_regs + AR71XX_GPIO_REG_SET);
+	mdelay(1);
+
+	ath79_usb_reset();
+}
+#else
+static inline void wdr4300_usb_start(void) {}
+#endif
+
+#ifdef CONFIG_BOARD_EARLY_INIT_F
+int board_early_init_f(void)
+{
+	void __iomem *regs;
+
+	regs = map_physmem(AR71XX_GPIO_BASE, AR71XX_GPIO_SIZE,
+			   MAP_NOCACHE);
+
+	/* Assure JTAG is not disconnected. */
+	writel(0x40, regs + AR934X_GPIO_REG_FUNC);
+
+	/* Configure default GPIO input/output regs. */
+	writel(0x3031b, regs + AR71XX_GPIO_REG_OE);
+	writel(0x0f804, regs + AR71XX_GPIO_REG_OUT);
+
+	/* Configure pin multiplexing. */
+	writel(0x00000000, regs + AR934X_GPIO_REG_OUT_FUNC0);
+	writel(0x0b0a0980, regs + AR934X_GPIO_REG_OUT_FUNC1);
+	writel(0x00180000, regs + AR934X_GPIO_REG_OUT_FUNC2);
+	writel(0x00000000, regs + AR934X_GPIO_REG_OUT_FUNC3);
+	writel(0x0000004d, regs + AR934X_GPIO_REG_OUT_FUNC4);
+	writel(0x00000000, regs + AR934X_GPIO_REG_OUT_FUNC5);
+
+#ifdef CONFIG_DEBUG_UART
+	debug_uart_init();
+#endif
+
+#ifndef CONFIG_SKIP_LOWLEVEL_INIT
+	ar934x_pll_init(560, 480, 240);
+	ar934x_ddr_init(560, 480, 240);
+#endif
+
+	wdr4300_usb_start();
+	ath79_eth_reset();
+
+	return 0;
+}
+#endif