ramips: add preliminary support for the RT3662/RT3883 SoCs

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@30495 3c298f89-4303-0410-b956-a3cf2f4a3e73

21 files changed, 1784 insertions, 0 deletions

diff --git a/target/linux/ramips/files/arch/mips/include/asm/mach-ralink/ramips_nand_platform.h b/target/linux/ramips/files/arch/mips/include/asm/mach-ralink/ramips_nand_platform.h
new file mode 100644
index 0000000000..54203db8ea
--- /dev/null
+++ b/target/linux/ramips/files/arch/mips/include/asm/mach-ralink/ramips_nand_platform.h
@@ -0,0 +1,23 @@
+/*
+ * Platform data definition for the built-in NAND controller of the
+ * Ralink RT305X/RT3662/RT3883 SoCs
+ *
+ * Copyright (C) 2011-2012 Gabor Juhos <juhosg@openwrt.org>
+ *
+ * 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.
+ */
+
+#ifndef _RAMIPS_NAND_PLATFORM_H
+#define _RAMIPS_NAND_PLATFORM_H
+
+#define RAMIPS_NAND_DRIVER_NAME		"ramips-nand"
+
+struct ramips_nand_platform_data {
+	const char		*name;
+	struct mtd_partition	*parts;
+	int			nr_parts;
+};
+
+#endif /* _RAMIPS_NAND_PLATFORM_H */
diff --git a/target/linux/ramips/files/arch/mips/include/asm/mach-ralink/rt3883.h b/target/linux/ramips/files/arch/mips/include/asm/mach-ralink/rt3883.h
new file mode 100644
index 0000000000..004acfb73b
--- /dev/null
+++ b/target/linux/ramips/files/arch/mips/include/asm/mach-ralink/rt3883.h
@@ -0,0 +1,133 @@
+/*
+ * Ralink RT3662/RT3883 SoC specific definitions
+ *
+ * Copyright (C) 2011-2012 Gabor Juhos <juhosg@openwrt.org>
+ *
+ * Parts of this file are based on Ralink's 2.6.21 BSP
+ *
+ * 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.
+ */
+
+#ifndef _RT3883_H_
+#define _RT3883_H_
+
+#include <linux/init.h>
+#include <linux/io.h>
+
+void rt3883_detect_sys_type(void);
+
+#define RT3883_MEM_SIZE_MIN (2 * 1024 * 1024)
+#define RT3883_MEM_SIZE_MAX (256 * 1024 * 1024)
+
+#define RT3883_CPU_IRQ_BASE	0
+#define RT3883_CPU_IRQ_COUNT	8
+#define RT3883_INTC_IRQ_BASE	(RT3883_CPU_IRQ_BASE + RT3883_CPU_IRQ_COUNT)
+#define RT3883_INTC_IRQ_COUNT	32
+#define RT3883_GPIO_IRQ_BASE	(RT3883_INTC_IRQ_BASE + RT3883_INTC_IRQ_COUNT)
+
+#define RT3883_CPU_IRQ_INTC	(RT3883_CPU_IRQ_BASE + 2)
+#define RT3883_CPU_IRQ_PCI	(RT3883_CPU_IRQ_BASE + 4)
+#define RT3883_CPU_IRQ_FE	(RT3883_CPU_IRQ_BASE + 5)
+#define RT3883_CPU_IRQ_WLAN	(RT3883_CPU_IRQ_BASE + 6)
+#define RT3883_CPU_IRQ_COUNTER	(RT3883_CPU_IRQ_BASE + 7)
+
+#define RT3883_INTC_IRQ_SYSCTL	(RT3883_INTC_IRQ_BASE + 0)
+#define RT3883_INTC_IRQ_TIMER0	(RT3883_INTC_IRQ_BASE + 1)
+#define RT3883_INTC_IRQ_TIMER1	(RT3883_INTC_IRQ_BASE + 2)
+#define RT3883_INTC_IRQ_IA	(RT3883_INTC_IRQ_BASE + 3)
+#define RT3883_INTC_IRQ_PCM	(RT3883_INTC_IRQ_BASE + 4)
+#define RT3883_INTC_IRQ_UART0	(RT3883_INTC_IRQ_BASE + 5)
+#define RT3883_INTC_IRQ_PIO	(RT3883_INTC_IRQ_BASE + 6)
+#define RT3883_INTC_IRQ_DMA	(RT3883_INTC_IRQ_BASE + 7)
+#define RT3883_INTC_IRQ_NAND	(RT3883_INTC_IRQ_BASE + 8)
+#define RT3883_INTC_IRQ_PERFC	(RT3883_INTC_IRQ_BASE + 9)
+#define RT3883_INTC_IRQ_I2S	(RT3883_INTC_IRQ_BASE + 10)
+#define RT3883_INTC_IRQ_UART1	(RT3883_INTC_IRQ_BASE + 12)
+#define RT3883_INTC_IRQ_UHST	(RT3883_INTC_IRQ_BASE + 18)
+#define RT3883_INTC_IRQ_UDEV	(RT3883_INTC_IRQ_BASE + 19)
+
+extern void __iomem *rt3883_sysc_base;
+extern void __iomem *rt3883_memc_base;
+
+static inline void rt3883_sysc_wr(u32 val, unsigned reg)
+{
+	__raw_writel(val, rt3883_sysc_base + reg);
+}
+
+static inline u32 rt3883_sysc_rr(unsigned reg)
+{
+	return __raw_readl(rt3883_sysc_base + reg);
+}
+
+static inline void rt3883_memc_wr(u32 val, unsigned reg)
+{
+	__raw_writel(val, rt3883_memc_base + reg);
+}
+
+static inline u32 rt3883_memc_rr(unsigned reg)
+{
+	return __raw_readl(rt3883_memc_base + reg);
+}
+
+#define RT3883_GPIO_I2C_SD	1
+#define RT3883_GPIO_I2C_SCLK	2
+#define RT3883_GPIO_SPI_CS0	3
+#define RT3883_GPIO_SPI_CLK	4
+#define RT3883_GPIO_SPI_MOSI	5
+#define RT3883_GPIO_SPI_MISO	6
+/* GPIO 7-14 is shared between UART0, PCM  and I2S interfaces */
+#define RT3883_GPIO_7		7
+#define RT3883_GPIO_8		8
+#define RT3883_GPIO_9		9
+#define RT3883_GPIO_10		10
+#define RT3883_GPIO_11		11
+#define RT3883_GPIO_12		12
+#define RT3883_GPIO_13		13
+#define RT3883_GPIO_14		14
+#define RT3883_GPIO_UART1_TXD	15
+#define RT3883_GPIO_UART1_RXD	16
+#define RT3883_GPIO_JTAG_TDO	17
+#define RT3883_GPIO_JTAG_TDI	18
+#define RT3883_GPIO_JTAG_TMS	19
+#define RT3883_GPIO_JTAG_TCLK	20
+#define RT3883_GPIO_JTAG_TRST_N	21
+#define RT3883_GPIO_MDIO_MDC	22
+#define RT3883_GPIO_MDIO_MDIO	23
+#define RT3883_GPIO_LNA_PE_A0	32
+#define RT3883_GPIO_LNA_PE_A1	33
+#define RT3883_GPIO_LNA_PE_A2	34
+#define RT3883_GPIO_LNA_PE_G0	35
+#define RT3883_GPIO_LNA_PE_G1	36
+#define RT3883_GPIO_LNA_PE_G2	37
+#define RT3883_GPIO_PCI_AD0	40
+#define RT3883_GPIO_PCI_AD31	71
+#define RT3883_GPIO_GE2_TXD0	72
+#define RT3883_GPIO_GE2_TXD1	73
+#define RT3883_GPIO_GE2_TXD2	74
+#define RT3883_GPIO_GE2_TXD3	75
+#define RT3883_GPIO_GE2_TXEN	76
+#define RT3883_GPIO_GE2_TXCLK	77
+#define RT3883_GPIO_GE2_RXD0	78
+#define RT3883_GPIO_GE2_RXD1	79
+#define RT3883_GPIO_GE2_RXD2	80
+#define RT3883_GPIO_GE2_RXD3	81
+#define RT3883_GPIO_GE2_RXDV	82
+#define RT3883_GPIO_GE2_RXCLK	83
+#define RT3883_GPIO_GE1_TXD0	84
+#define RT3883_GPIO_GE1_TXD1	85
+#define RT3883_GPIO_GE1_TXD2	86
+#define RT3883_GPIO_GE1_TXD3	87
+#define RT3883_GPIO_GE1_TXEN	88
+#define RT3883_GPIO_GE1_TXCLK	89
+#define RT3883_GPIO_GE1_RXD0	90
+#define RT3883_GPIO_GE1_RXD1	91
+#define RT3883_GPIO_GE1_RXD2	92
+#define RT3883_GPIO_GE1_RXD3	93
+#define RT3883_GPIO_GE1_RXDV	94
+#define RT3883_GPIO_GE1_RXCLK	95
+
+void rt3883_gpio_init(u32 mode);
+
+#endif /* _RT3883_H_ */
diff --git a/target/linux/ramips/files/arch/mips/include/asm/mach-ralink/rt3883/cpu-feature-overrides.h b/target/linux/ramips/files/arch/mips/include/asm/mach-ralink/rt3883/cpu-feature-overrides.h
new file mode 100644
index 0000000000..7ff0b358e2
--- /dev/null
+++ b/target/linux/ramips/files/arch/mips/include/asm/mach-ralink/rt3883/cpu-feature-overrides.h
@@ -0,0 +1,55 @@
+/*
+ * Ralink RT3662/RT3883 specific CPU feature overrides
+ *
+ * Copyright (C) 2011-2012 Gabor Juhos <juhosg@openwrt.org>
+ *
+ * This file was derived from: include/asm-mips/cpu-features.h
+ *	Copyright (C) 2003, 2004 Ralf Baechle
+ *	Copyright (C) 2004 Maciej W. Rozycki
+ *
+ * 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.
+ *
+ */
+#ifndef __ASM_MACH_RALINK_CPU_FEATURE_OVERRIDES_H
+#define __ASM_MACH_RALINK_CPU_FEATURE_OVERRIDES_H
+
+#define cpu_has_tlb		1
+#define cpu_has_4kex		1
+#define cpu_has_3k_cache	0
+#define cpu_has_4k_cache	1
+#define cpu_has_tx39_cache	0
+#define cpu_has_sb1_cache	0
+#define cpu_has_fpu		0
+#define cpu_has_32fpr		0
+#define cpu_has_counter		1
+#define cpu_has_watch		1
+#define cpu_has_divec		1
+
+#define cpu_has_prefetch	1
+#define cpu_has_ejtag		1
+#define cpu_has_llsc		1
+
+#define cpu_has_mips16		1
+#define cpu_has_mdmx		0
+#define cpu_has_mips3d		0
+#define cpu_has_smartmips	0
+
+#define cpu_has_mips32r1	1
+#define cpu_has_mips32r2	1
+#define cpu_has_mips64r1	0
+#define cpu_has_mips64r2	0
+
+#define cpu_has_dsp		0
+#define cpu_has_mipsmt		0
+
+#define cpu_has_64bits		0
+#define cpu_has_64bit_zero_reg	0
+#define cpu_has_64bit_gp_regs	0
+#define cpu_has_64bit_addresses	0
+
+#define cpu_dcache_line_size()	32
+#define cpu_icache_line_size()	32
+
+#endif /* __ASM_MACH_RALINK_CPU_FEATURE_OVERRIDES_H */
diff --git a/target/linux/ramips/files/arch/mips/include/asm/mach-ralink/rt3883/ralink_soc.h b/target/linux/ramips/files/arch/mips/include/asm/mach-ralink/rt3883/ralink_soc.h
new file mode 100644
index 0000000000..8a080b7d27
--- /dev/null
+++ b/target/linux/ramips/files/arch/mips/include/asm/mach-ralink/rt3883/ralink_soc.h
@@ -0,0 +1,18 @@
+/*
+ * Ralink RT3662/RT3883 specific SOC defines
+ *
+ * Copyright (C) 2011-2012 Gabor Juhos <juhosg@openwrt.org>
+ *
+ * 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.
+ */
+
+#ifndef _RT3883_RALINK_SOC_H
+#define _RT3883_RALINK_SOC_H
+
+#define RALINK_SOC_SDRAM_BASE		0
+#define RALINK_SOC_MEM_SIZE_MIN		(2 * 1024 * 1024)
+#define RALINK_SOC_MEM_SIZE_MAX		(256 * 1024 * 1024)
+
+#endif /* _RT3883_RALINK_SOC_H */
diff --git a/target/linux/ramips/files/arch/mips/include/asm/mach-ralink/rt3883_ehci_platform.h b/target/linux/ramips/files/arch/mips/include/asm/mach-ralink/rt3883_ehci_platform.h
new file mode 100644
index 0000000000..a83c458507
--- /dev/null
+++ b/target/linux/ramips/files/arch/mips/include/asm/mach-ralink/rt3883_ehci_platform.h
@@ -0,0 +1,20 @@
+/*
+ * Platform data definition for built-in EHCI controller of the
+ * Ralink RT3662/RT3883 SoCs
+ *
+ * Copyright (C) 2011-2012 Gabor Juhos <juhosg@openwrt.org>
+ *
+ * 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.
+ */
+
+#ifndef _RT3883_EHCI_PLATFORM_H
+#define _RT3883_EHCI_PLATFORM_H
+
+struct rt3883_ehci_platform_data {
+	void	(*start_hw)(void);
+	void	(*stop_hw)(void);
+};
+
+#endif /*  _RT3883_EHCI_PLATFORM_H */
diff --git a/target/linux/ramips/files/arch/mips/include/asm/mach-ralink/rt3883_ohci_platform.h b/target/linux/ramips/files/arch/mips/include/asm/mach-ralink/rt3883_ohci_platform.h
new file mode 100644
index 0000000000..cc8383bf3d
--- /dev/null
+++ b/target/linux/ramips/files/arch/mips/include/asm/mach-ralink/rt3883_ohci_platform.h
@@ -0,0 +1,20 @@
+/*
+ * Platform data definition for built-in OHCI controller of the
+ * Ralink RT3662/RT3883 SoCs
+ *
+ * Copyright (C) 2011-2012 Gabor Juhos <juhosg@openwrt.org>
+ *
+ * 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.
+ */
+
+#ifndef _RT3883_OHCI_PLATFORM_H
+#define _RT3883_OHCI_PLATFORM_H
+
+struct rt3883_ohci_platform_data {
+	void	(*start_hw)(void);
+	void	(*stop_hw)(void);
+};
+
+#endif /*  _RT3883_OHCI_PLATFORM_H */
diff --git a/target/linux/ramips/files/arch/mips/include/asm/mach-ralink/rt3883_regs.h b/target/linux/ramips/files/arch/mips/include/asm/mach-ralink/rt3883_regs.h
new file mode 100644
index 0000000000..7149e6fafd
--- /dev/null
+++ b/target/linux/ramips/files/arch/mips/include/asm/mach-ralink/rt3883_regs.h
@@ -0,0 +1,199 @@
+/*
+ *  Ralink RT3662/RT3883 SoC register definitions
+ *
+ *  Copyright (C) 2011-2012 Gabor Juhos <juhosg@openwrt.org>
+ *
+ *  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.
+ */
+
+#ifndef _RT3883_REGS_H_
+#define _RT3883_REGS_H_
+
+#include <linux/bitops.h>
+
+#define RT3883_SDRAM_BASE	0x00000000
+#define RT3883_SYSC_BASE	0x10000000
+#define RT3883_TIMER_BASE	0x10000100
+#define RT3883_INTC_BASE	0x10000200
+#define RT3883_MEMC_BASE	0x10000300
+#define RT3883_UART0_BASE	0x10000500
+#define RT3883_PIO_BASE		0x10000600
+#define RT3883_FSCC_BASE	0x10000700
+#define RT3883_NANDC_BASE	0x10000810
+#define RT3883_I2C_BASE		0x10000900
+#define RT3883_I2S_BASE		0x10000a00
+#define RT3883_SPI_BASE		0x10000b00
+#define RT3883_UART1_BASE	0x10000c00
+#define RT3883_PCM_BASE		0x10002000
+#define RT3883_GDMA_BASE	0x10002800
+#define RT3883_CODEC1_BASE	0x10003000
+#define RT3883_CODEC2_BASE	0x10003800
+#define RT3883_FE_BASE		0x10100000
+#define RT3883_ROM_BASE		0x10118000
+#define RT3883_USBDEV_BASE	0x10112000
+#define RT3883_PCI_BASE		0x10140000
+#define RT3883_WLAN_BASE	0x10180000
+#define RT3883_USBHOST_BASE	0x101c0000
+#define RT3883_BOOT_BASE	0x1c000000
+#define RT3883_SRAM_BASE	0x1e000000
+#define RT3883_PCIMEM_BASE	0x20000000
+
+#define RT3883_EHCI_BASE	(RT3883_USBHOST_BASE)
+#define RT3883_OHCI_BASE	(RT3883_USBHOST_BASE + 0x1000)
+
+#define RT3883_SYSC_SIZE	0x100
+#define RT3883_TIMER_SIZE	0x100
+#define RT3883_INTC_SIZE	0x100
+#define RT3883_MEMC_SIZE	0x100
+#define RT3883_UART0_SIZE	0x100
+#define RT3883_UART1_SIZE	0x100
+#define RT3883_PIO_SIZE		0x100
+#define RT3883_FSCC_SIZE	0x100
+#define RT3883_NANDC_SIZE	0x0f0
+#define RT3883_I2C_SIZE		0x100
+#define RT3883_I2S_SIZE		0x100
+#define RT3883_SPI_SIZE		0x100
+#define RT3883_PCM_SIZE		0x800
+#define RT3883_GDMA_SIZE	0x800
+#define RT3883_CODEC1_SIZE	0x800
+#define RT3883_CODEC2_SIZE	0x800
+#define RT3883_FE_SIZE		0x10000
+#define RT3883_ROM_SIZE		0x4000
+#define RT3883_USBDEV_SIZE	0x4000
+#define RT3883_PCI_SIZE		0x40000
+#define RT3883_WLAN_SIZE	0x40000
+#define RT3883_USBHOST_SIZE	0x40000
+#define RT3883_BOOT_SIZE	(32 * 1024 * 1024)
+#define RT3883_SRAM_SIZE	(32 * 1024 * 1024)
+
+/* SYSC registers */
+#define RT3883_SYSC_REG_CHIPID0_3	0x00	/* Chip ID 0 */
+#define RT3883_SYSC_REG_CHIPID4_7	0x04	/* Chip ID 1 */
+#define RT3883_SYSC_REG_REVID		0x0c	/* Chip Revision Identification */
+#define RT3883_SYSC_REG_SYSCFG0		0x10	/* System Configuration 0 */
+#define RT3883_SYSC_REG_SYSCFG1		0x14	/* System Configuration 1 */
+#define RT3883_SYSC_REG_CLKCFG0		0x2c	/* Clock Configuration 0 */
+#define RT3883_SYSC_REG_CLKCFG1		0x30	/* Clock Configuration 1 */
+#define RT3883_SYSC_REG_RSTCTRL		0x34	/* Reset Control*/
+#define RT3883_SYSC_REG_RSTSTAT		0x38	/* Reset Status*/
+#define RT3883_SYSC_REG_USB_PS		0x5c	/* USB Power saving control */
+#define RT3883_SYSC_REG_GPIO_MODE	0x60	/* GPIO Purpose Select */
+#define RT3883_SYSC_REG_PMU		0x88
+#define RT3883_SYSC_REG_PMU1		0x8c
+
+#define RT3883_REVID_VER_ID_MASK	0x0f
+#define RT3883_REVID_VER_ID_SHIFT	8
+#define RT3883_REVID_ECO_ID_MASK	0x0f
+
+#define RT3883_SYSCFG0_DRAM_TYPE_DDR2	BIT(17)
+#define RT3883_SYSCFG0_CPUCLK_SHIFT	8
+#define RT3883_SYSCFG0_CPUCLK_MASK	0x3
+#define RT3883_SYSCFG0_CPUCLK_250	0x0
+#define RT3883_SYSCFG0_CPUCLK_384	0x1
+#define RT3883_SYSCFG0_CPUCLK_480	0x2
+#define RT3883_SYSCFG0_CPUCLK_500	0x3
+
+#define RT3883_SYSCFG1_USB0_HOST_MODE	BIT(10)
+#define RT3883_SYSCFG1_GPIO2_AS_WDT_OUT	BIT(2)
+
+#define RT3883_CLKCFG1_UPHY1_CLK_EN	BIT(20)
+#define RT3883_CLKCFG1_UPHY0_CLK_EN	BIT(18)
+
+#define RT3883_GPIO_MODE_I2C		BIT(0)
+#define RT3883_GPIO_MODE_SPI		BIT(1)
+#define RT3883_GPIO_MODE_UART0_SHIFT	2
+#define RT3883_GPIO_MODE_UART0_MASK	0x7
+#define RT3883_GPIO_MODE_UART0(x)	((x) << RT3883_GPIO_MODE_UART0_SHIFT)
+#define RT3883_GPIO_MODE_UARTF		0x0
+#define RT3883_GPIO_MODE_PCM_UARTF	0x1
+#define RT3883_GPIO_MODE_PCM_I2S	0x2
+#define RT3883_GPIO_MODE_I2S_UARTF	0x3
+#define RT3883_GPIO_MODE_PCM_GPIO	0x4
+#define RT3883_GPIO_MODE_GPIO_UARTF	0x5
+#define RT3883_GPIO_MODE_GPIO_I2S	0x6
+#define RT3883_GPIO_MODE_GPIO		0x7
+#define RT3883_GPIO_MODE_UART1		BIT(5)
+#define RT3883_GPIO_MODE_JTAG		BIT(6)
+#define RT3883_GPIO_MODE_MDIO		BIT(7)
+#define RT3883_GPIO_MODE_GE1		BIT(9)
+#define RT3883_GPIO_MODE_GE2		BIT(10)
+#define RT3883_GPIO_MODE_PCI_SHIFT	11
+#define RT3883_GPIO_MODE_PCI_MASK	0x7
+#define RT3883_GPIO_MODE_PCI(_x)	((_x) << RT3883_GPIO_MODE_PCI_SHIFT)
+#define RT3883_GPIO_MODE_PCI_DEV	0
+#define RT3883_GPIO_MODE_PCI_HOST2	1
+#define RT3883_GPIO_MODE_PCI_HOST1	2
+#define RT3883_GPIO_MODE_PCI_FNC	3
+#define RT3883_GPIO_MODE_PCI_GPIO	7
+#define RT3883_GPIO_MODE_LNA_A_SHIFT	16
+#define RT3883_GPIO_MODE_LNA_A_MASK	0x3
+#define RT3883_GPIO_MODE_LNA_A(_x)	((_x) << RT3883_GPIO_MODE_LNA_A_SHIFT)
+#define RT3883_GPIO_MODE_LNA_A_GPIO	0x3
+#define RT3883_GPIO_MODE_LNA_G_SHIFT	18
+#define RT3883_GPIO_MODE_LNA_G_MASK	0x3
+#define RT3883_GPIO_MODE_LNA_G(_x)	((_x) << RT3883_GPIO_MODE_LNA_G_SHIFT)
+#define RT3883_GPIO_MODE_LNA_G_GPIO	0x3
+
+#define RT3883_RSTCTRL_PCIE_PCI_PDM	BIT(27)
+#define RT3883_RSTCTRL_FLASH		BIT(26)
+#define RT3883_RSTCTRL_UDEV		BIT(25)
+#define RT3883_RSTCTRL_PCI		BIT(24)
+#define RT3883_RSTCTRL_PCIE		BIT(23)
+#define RT3883_RSTCTRL_UHST		BIT(22)
+#define RT3883_RSTCTRL_FE		BIT(21)
+#define RT3883_RSTCTRL_WLAN		BIT(20)
+#define RT3883_RSTCTRL_UART1		BIT(29)
+#define RT3883_RSTCTRL_SPI		BIT(18)
+#define RT3883_RSTCTRL_I2S		BIT(17)
+#define RT3883_RSTCTRL_I2C		BIT(16)
+#define RT3883_RSTCTRL_NAND		BIT(15)
+#define RT3883_RSTCTRL_DMA		BIT(14)
+#define RT3883_RSTCTRL_PIO		BIT(13)
+#define RT3883_RSTCTRL_UART		BIT(12)
+#define RT3883_RSTCTRL_PCM		BIT(11)
+#define RT3883_RSTCTRL_MC		BIT(10)
+#define RT3883_RSTCTRL_INTC		BIT(9)
+#define RT3883_RSTCTRL_TIMER		BIT(8)
+#define RT3883_RSTCTRL_SYS		BIT(0)
+
+#define RT3883_INTC_INT_SYSCTL	BIT(0)
+#define RT3883_INTC_INT_TIMER0	BIT(1)
+#define RT3883_INTC_INT_TIMER1	BIT(2)
+#define RT3883_INTC_INT_IA	BIT(3)
+#define RT3883_INTC_INT_PCM	BIT(4)
+#define RT3883_INTC_INT_UART0	BIT(5)
+#define RT3883_INTC_INT_PIO	BIT(6)
+#define RT3883_INTC_INT_DMA	BIT(7)
+#define RT3883_INTC_INT_NAND	BIT(8)
+#define RT3883_INTC_INT_PERFC	BIT(9)
+#define RT3883_INTC_INT_I2S	BIT(10)
+#define RT3883_INTC_INT_UART1	BIT(12)
+#define RT3883_INTC_INT_UHST	BIT(18)
+#define RT3883_INTC_INT_UDEV	BIT(19)
+
+/* FLASH/SRAM/Codec Controller registers */
+#define RT3883_FSCC_REG_FLASH_CFG0	0x00
+#define RT3883_FSCC_REG_FLASH_CFG1	0x04
+#define RT3883_FSCC_REG_CODEC_CFG0	0x40
+#define RT3883_FSCC_REG_CODEC_CFG1	0x44
+
+#define RT3883_FLASH_CFG_WIDTH_SHIFT	26
+#define RT3883_FLASH_CFG_WIDTH_MASK	0x3
+#define RT3883_FLASH_CFG_WIDTH_8BIT	0x0
+#define RT3883_FLASH_CFG_WIDTH_16BIT	0x1
+#define RT3883_FLASH_CFG_WIDTH_32BIT	0x2
+
+
+/* UART registers */
+#define RT3883_UART_REG_RX	0
+#define RT3883_UART_REG_TX	1
+#define RT3883_UART_REG_IER	2
+#define RT3883_UART_REG_IIR	3
+#define RT3883_UART_REG_FCR	4
+#define RT3883_UART_REG_LCR	5
+#define RT3883_UART_REG_MCR	6
+#define RT3883_UART_REG_LSR	7
+
+#endif /* _RT3883_REGS_H_ */
diff --git a/target/linux/ramips/files/arch/mips/ralink/Kconfig b/target/linux/ramips/files/arch/mips/ralink/Kconfig
index 1bb6bc3ba4..a7e7f21f97 100644
--- a/target/linux/ramips/files/arch/mips/ralink/Kconfig
+++ b/target/linux/ramips/files/arch/mips/ralink/Kconfig
@@ -14,10 +14,15 @@ choice
 		bool "RT305x"
 		select SOC_RT305X
 
+	config RALINK_RT3883
+		bool "RT3883"
+		select SOC_RT3883
+
 endchoice
 
 source "arch/mips/ralink/rt288x/Kconfig"
 source "arch/mips/ralink/rt305x/Kconfig"
+source "arch/mips/ralink/rt3883/Kconfig"
 
 config SOC_RT288X
 	bool
@@ -49,6 +54,22 @@ config SOC_RT305X
 	select MIPS_MACHINE
 	select USB_ARCH_HAS_HCD
 
+config SOC_RT3883
+	bool
+	select CEVT_R4K
+	select CSRC_R4K
+	select DMA_NONCOHERENT
+	select IRQ_CPU
+	select ARCH_REQUIRE_GPIOLIB
+	select SYS_HAS_CPU_MIPS32_R1
+	select SYS_HAS_CPU_MIPS32_R2
+	select SYS_SUPPORTS_32BIT_KERNEL
+	select SYS_SUPPORTS_LITTLE_ENDIAN
+	select SYS_HAS_EARLY_PRINTK
+	select MIPS_MACHINE
+	select USB_ARCH_HAS_OHCI
+	select USB_ARCH_HAS_EHCI
+
 config RALINK_DEV_GPIO_BUTTONS
 	def_bool n
 
diff --git a/target/linux/ramips/files/arch/mips/ralink/Platform b/target/linux/ramips/files/arch/mips/ralink/Platform
index 86871bda33..1b540492c2 100644
--- a/target/linux/ramips/files/arch/mips/ralink/Platform
+++ b/target/linux/ramips/files/arch/mips/ralink/Platform
@@ -17,3 +17,10 @@ load-$(CONFIG_RALINK_RT288X)   += 0xffffffff88000000
 core-$(CONFIG_RALINK_RT305X)   += arch/mips/ralink/rt305x/
 cflags-$(CONFIG_RALINK_RT305X) += -I$(srctree)/arch/mips/include/asm/mach-ralink/rt305x
 load-$(CONFIG_RALINK_RT305X)   += 0xffffffff80000000
+
+#
+# Ralink RT3883
+#
+core-$(CONFIG_RALINK_RT3883)   += arch/mips/ralink/rt3883/
+cflags-$(CONFIG_RALINK_RT3883) += -I$(srctree)/arch/mips/include/asm/mach-ralink/rt3883
+load-$(CONFIG_RALINK_RT3883)   += 0xffffffff80000000
diff --git a/target/linux/ramips/files/arch/mips/ralink/rt3883/Kconfig b/target/linux/ramips/files/arch/mips/ralink/rt3883/Kconfig
new file mode 100644
index 0000000000..7b4579adbc
--- /dev/null
+++ b/target/linux/ramips/files/arch/mips/ralink/rt3883/Kconfig
@@ -0,0 +1,7 @@
+if RALINK_RT3883
+
+menu "Ralink RT3662/RT3883 machine selection"
+
+endmenu
+
+endif
diff --git a/target/linux/ramips/files/arch/mips/ralink/rt3883/Makefile b/target/linux/ramips/files/arch/mips/ralink/rt3883/Makefile
new file mode 100644
index 0000000000..f8098592b1
--- /dev/null
+++ b/target/linux/ramips/files/arch/mips/ralink/rt3883/Makefile
@@ -0,0 +1,12 @@
+#
+# Makefile for the Ralink RT3662/RT3883 SoC specific parts of the kernel
+#
+# Copyright (C) 2011-2012 Gabor Juhos <juhosg@openwrt.org>
+#
+# This program is free software; you can redistribute it and/or modify it
+# under the terms of the GNU General Public License version 2 as published
+# by the Free Software Foundation.
+
+obj-y	:= irq.o setup.o devices.o rt3883.o clock.o
+
+obj-$(CONFIG_EARLY_PRINTK)		+= early_printk.o
diff --git a/target/linux/ramips/files/arch/mips/ralink/rt3883/clock.c b/target/linux/ramips/files/arch/mips/ralink/rt3883/clock.c
new file mode 100644
index 0000000000..bf70259cae
--- /dev/null
+++ b/target/linux/ramips/files/arch/mips/ralink/rt3883/clock.c
@@ -0,0 +1,103 @@
+/*
+ *  Ralink RT3662/RT3883 clock API
+ *
+ *  Copyright (C) 2011-2012 Gabor Juhos <juhosg@openwrt.org>
+ *
+ *  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/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/err.h>
+#include <linux/clk.h>
+
+#include <asm/mach-ralink/common.h>
+#include <asm/mach-ralink/rt3883.h>
+#include <asm/mach-ralink/rt3883_regs.h>
+#include "common.h"
+
+struct clk {
+	unsigned long rate;
+};
+
+static struct clk rt3883_cpu_clk;
+static struct clk rt3883_sys_clk;
+static struct clk rt3883_wdt_clk;
+static struct clk rt3883_uart_clk;
+
+void __init rt3883_clocks_init(void)
+{
+	u32 syscfg0;
+	u32 clksel;
+	u32 ddr2;
+
+	syscfg0 = rt3883_sysc_rr(RT3883_SYSC_REG_SYSCFG0);
+	clksel = ((syscfg0 >> RT3883_SYSCFG0_CPUCLK_SHIFT) &
+		  RT3883_SYSCFG0_CPUCLK_MASK);
+	ddr2 = syscfg0 & RT3883_SYSCFG0_DRAM_TYPE_DDR2;
+
+	switch (clksel) {
+	case RT3883_SYSCFG0_CPUCLK_250:
+		rt3883_cpu_clk.rate = 250000000;
+		rt3883_sys_clk.rate = (ddr2) ? 125000000 : 83000000;
+		break;
+	case RT3883_SYSCFG0_CPUCLK_384:
+		rt3883_cpu_clk.rate = 384000000;
+		rt3883_sys_clk.rate = (ddr2) ? 128000000 : 96000000;
+		break;
+	case RT3883_SYSCFG0_CPUCLK_480:
+		rt3883_cpu_clk.rate = 480000000;
+		rt3883_sys_clk.rate = (ddr2) ? 160000000 : 120000000;
+		break;
+	case RT3883_SYSCFG0_CPUCLK_500:
+		rt3883_cpu_clk.rate = 500000000;
+		rt3883_sys_clk.rate = (ddr2) ? 166000000 : 125000000;
+		break;
+	}
+
+	rt3883_wdt_clk.rate = rt3883_sys_clk.rate;
+	rt3883_uart_clk.rate = 40000000;
+}
+
+struct clk *clk_get(struct device *dev, const char *id)
+{
+	if (!strcmp(id, "sys"))
+		return &rt3883_sys_clk;
+
+	if (!strcmp(id, "cpu"))
+		return &rt3883_cpu_clk;
+
+	if (!strcmp(id, "wdt"))
+		return &rt3883_wdt_clk;
+
+	if (!strcmp(id, "uart"))
+		return &rt3883_uart_clk;
+
+	return ERR_PTR(-ENOENT);
+}
+EXPORT_SYMBOL(clk_get);
+
+int clk_enable(struct clk *clk)
+{
+	return 0;
+}
+EXPORT_SYMBOL(clk_enable);
+
+void clk_disable(struct clk *clk)
+{
+}
+EXPORT_SYMBOL(clk_disable);
+
+unsigned long clk_get_rate(struct clk *clk)
+{
+	return clk->rate;
+}
+EXPORT_SYMBOL(clk_get_rate);
+
+void clk_put(struct clk *clk)
+{
+}
+EXPORT_SYMBOL(clk_put);
diff --git a/target/linux/ramips/files/arch/mips/ralink/rt3883/common.h b/target/linux/ramips/files/arch/mips/ralink/rt3883/common.h
new file mode 100644
index 0000000000..a389dccce0
--- /dev/null
+++ b/target/linux/ramips/files/arch/mips/ralink/rt3883/common.h
@@ -0,0 +1,16 @@
+/*
+ * Ralink RT3662/RT3883 SoC common defines
+ *
+ * Copyright (C) 2011-2012 Gabor Juhos <juhosg@openwrt.org>
+ *
+ * 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.
+ */
+
+#ifndef _RT3883_COMMON_H
+#define _RT3883_COMMON_H
+
+void rt3883_clocks_init(void);
+
+#endif /*  _RT3883_COMMON_H */
\ No newline at end of file
diff --git a/target/linux/ramips/files/arch/mips/ralink/rt3883/devices.c b/target/linux/ramips/files/arch/mips/ralink/rt3883/devices.c
new file mode 100644
index 0000000000..058402a5a5
--- /dev/null
+++ b/target/linux/ramips/files/arch/mips/ralink/rt3883/devices.c
@@ -0,0 +1,385 @@
+/*
+ *  Ralink RT3662/RT3883 SoC platform device registration
+ *
+ *  Copyright (C) 2011-2012 Gabor Juhos <juhosg@openwrt.org>
+ *
+ *  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/kernel.h>
+#include <linux/platform_device.h>
+#include <linux/mtd/mtd.h>
+#include <linux/mtd/physmap.h>
+#include <linux/mtd/partitions.h>
+#include <linux/dma-mapping.h>
+#include <linux/delay.h>
+#include <linux/err.h>
+#include <linux/clk.h>
+#include <linux/rt2x00_platform.h>
+
+#include <asm/addrspace.h>
+
+#include <asm/mach-ralink/rt3883.h>
+#include <asm/mach-ralink/rt3883_regs.h>
+#include <asm/mach-ralink/rt3883_ehci_platform.h>
+#include <asm/mach-ralink/rt3883_ohci_platform.h>
+#include <asm/mach-ralink/ramips_nand_platform.h>
+#include "devices.h"
+
+#include <ramips_eth_platform.h>
+
+static struct resource rt3883_flash0_resources[] = {
+	{
+		.flags	= IORESOURCE_MEM,
+		.start	= RT3883_BOOT_BASE,
+		.end	= RT3883_BOOT_BASE + RT3883_BOOT_SIZE - 1,
+	},
+};
+
+struct physmap_flash_data rt3883_flash0_data;
+static struct platform_device rt3883_flash0_device = {
+	.name		= "physmap-flash",
+	.resource	= rt3883_flash0_resources,
+	.num_resources	= ARRAY_SIZE(rt3883_flash0_resources),
+	.dev = {
+		.platform_data = &rt3883_flash0_data,
+	},
+};
+
+static struct resource rt3883_flash1_resources[] = {
+	{
+		.flags	= IORESOURCE_MEM,
+		.start	= RT3883_SRAM_BASE,
+		.end	= RT3883_SRAM_BASE + RT3883_SRAM_SIZE - 1,
+	},
+};
+
+struct physmap_flash_data rt3883_flash1_data;
+static struct platform_device rt3883_flash1_device = {
+	.name		= "physmap-flash",
+	.resource	= rt3883_flash1_resources,
+	.num_resources	= ARRAY_SIZE(rt3883_flash1_resources),
+	.dev = {
+		.platform_data = &rt3883_flash1_data,
+	},
+};
+
+static int rt3883_flash_instance __initdata;
+void __init rt3883_register_pflash(unsigned int id)
+{
+	struct platform_device *pdev;
+	struct physmap_flash_data *pdata;
+	void __iomem *fscc_base;
+	u32 t;
+	int reg;
+
+	switch (id) {
+	case 0:
+		pdev = &rt3883_flash0_device;
+		reg = RT3883_FSCC_REG_FLASH_CFG0;
+		break;
+	case 1:
+		pdev = &rt3883_flash1_device;
+		reg = RT3883_FSCC_REG_FLASH_CFG1;
+		break;
+	default:
+		return;
+	}
+
+	pdata = pdev->dev.platform_data;
+
+	fscc_base = ioremap(RT3883_FSCC_BASE, RT3883_FSCC_SIZE);
+	if (!fscc_base)
+		panic("RT3883: ioremap failed for FSCC");
+
+	t = __raw_readl(fscc_base + reg);
+	iounmap(fscc_base);
+
+	t = (t >> RT3883_FLASH_CFG_WIDTH_SHIFT) & RT3883_FLASH_CFG_WIDTH_MASK;
+	switch (t) {
+	case RT3883_FLASH_CFG_WIDTH_8BIT:
+		pdata->width = 1;
+		break;
+	case RT3883_FLASH_CFG_WIDTH_16BIT:
+		pdata->width = 2;
+		break;
+	case RT3883_FLASH_CFG_WIDTH_32BIT:
+		if (id == 1) {
+			pdata->width = 4;
+			break;
+		}
+		/* fallthrough */
+	default:
+		pr_warn("RT3883: flash bank%d: invalid width detected\n", id);
+		return;
+	}
+
+	pdev->id = rt3883_flash_instance;
+
+	platform_device_register(pdev);
+	rt3883_flash_instance++;
+}
+
+static atomic_t rt3883_usb_use_count = ATOMIC_INIT(0);
+
+static void rt3883_usb_host_start(void)
+{
+	u32 t;
+
+	if (atomic_inc_return(&rt3883_usb_use_count) != 1)
+		return;
+
+	t = rt3883_sysc_rr(RT3883_SYSC_REG_USB_PS);
+
+#if 0
+	/* put the HOST controller into reset */
+	t = rt3883_sysc_rr(RT3883_SYSC_REG_RSTCTRL);
+	t |= RT3883_RSTCTRL_UHST;
+	rt3883_sysc_wr(t, RT3883_SYSC_REG_RSTCTRL);
+#endif
+
+	/* enable clock for port0's and port1's phys */
+	t = rt3883_sysc_rr(RT3883_SYSC_REG_CLKCFG1);
+	t = t | RT3883_CLKCFG1_UPHY0_CLK_EN | RT3883_CLKCFG1_UPHY1_CLK_EN;
+	rt3883_sysc_wr(t, RT3883_SYSC_REG_CLKCFG1);
+	mdelay(500);
+
+	/* pull USBHOST and USBDEV out from reset */
+	t = rt3883_sysc_rr(RT3883_SYSC_REG_RSTCTRL);
+	t &= ~(RT3883_RSTCTRL_UHST | RT3883_RSTCTRL_UDEV);
+	rt3883_sysc_wr(t, RT3883_SYSC_REG_RSTCTRL);
+	mdelay(500);
+
+	/* enable host mode */
+	t = rt3883_sysc_rr(RT3883_SYSC_REG_SYSCFG1);
+	t |= RT3883_SYSCFG1_USB0_HOST_MODE;
+	rt3883_sysc_wr(t, RT3883_SYSC_REG_SYSCFG1);
+
+	t = rt3883_sysc_rr(RT3883_SYSC_REG_USB_PS);
+}
+
+static void rt3883_usb_host_stop(void)
+{
+	u32 t;
+
+	if (atomic_dec_return(&rt3883_usb_use_count) != 0)
+		return;
+
+	/* put USBHOST and USBDEV into reset */
+	t = rt3883_sysc_rr(RT3883_SYSC_REG_RSTCTRL);
+	t |= RT3883_RSTCTRL_UHST | RT3883_RSTCTRL_UDEV;
+	rt3883_sysc_wr(t, RT3883_SYSC_REG_RSTCTRL);
+	udelay(10000);
+
+	/* disable clock for port0's and port1's phys*/
+	t = rt3883_sysc_rr(RT3883_SYSC_REG_CLKCFG1);
+	t &= ~(RT3883_CLKCFG1_UPHY0_CLK_EN | RT3883_CLKCFG1_UPHY1_CLK_EN);
+	rt3883_sysc_wr(t, RT3883_SYSC_REG_CLKCFG1);
+	udelay(10000);
+}
+
+static struct rt3883_ehci_platform_data rt3883_ehci_data = {
+	.start_hw	= rt3883_usb_host_start,
+	.stop_hw	= rt3883_usb_host_stop,
+};
+
+static struct resource rt3883_ehci_resources[] = {
+	{
+		.start	= RT3883_EHCI_BASE,
+		.end	= RT3883_EHCI_BASE + PAGE_SIZE - 1,
+		.flags	= IORESOURCE_MEM,
+	}, {
+		.start	= RT3883_INTC_IRQ_UHST,
+		.end	= RT3883_INTC_IRQ_UHST,
+		.flags	= IORESOURCE_IRQ,
+	},
+};
+
+static u64 rt3883_ehci_dmamask = DMA_BIT_MASK(32);
+static struct platform_device rt3883_ehci_device = {
+	.name		= "rt3883-ehci",
+	.id		= -1,
+	.resource	= rt3883_ehci_resources,
+	.num_resources	= ARRAY_SIZE(rt3883_ehci_resources),
+	.dev            = {
+		.dma_mask		= &rt3883_ehci_dmamask,
+		.coherent_dma_mask	= DMA_BIT_MASK(32),
+		.platform_data		= &rt3883_ehci_data,
+	},
+};
+
+static struct resource rt3883_ohci_resources[] = {
+	{
+		.start	= RT3883_OHCI_BASE,
+		.end	= RT3883_OHCI_BASE + PAGE_SIZE - 1,
+		.flags	= IORESOURCE_MEM,
+	}, {
+		.start	= RT3883_INTC_IRQ_UHST,
+		.end	= RT3883_INTC_IRQ_UHST,
+		.flags	= IORESOURCE_IRQ,
+	},
+};
+
+static struct rt3883_ohci_platform_data rt3883_ohci_data = {
+	.start_hw	= rt3883_usb_host_start,
+	.stop_hw	= rt3883_usb_host_stop,
+};
+
+static u64 rt3883_ohci_dmamask = DMA_BIT_MASK(32);
+static struct platform_device rt3883_ohci_device = {
+	.name		= "rt3883-ohci",
+	.id		= -1,
+	.resource	= rt3883_ohci_resources,
+	.num_resources	= ARRAY_SIZE(rt3883_ohci_resources),
+	.dev            = {
+		.dma_mask		= &rt3883_ohci_dmamask,
+		.coherent_dma_mask	= DMA_BIT_MASK(32),
+		.platform_data		= &rt3883_ohci_data,
+	},
+};
+
+void __init rt3883_register_usbhost(void)
+{
+	platform_device_register(&rt3883_ehci_device);
+	platform_device_register(&rt3883_ohci_device);
+}
+
+static void rt3883_fe_reset(void)
+{
+	u32 t;
+
+	t = rt3883_sysc_rr(RT3883_SYSC_REG_RSTCTRL);
+	t |= RT3883_RSTCTRL_FE;
+	rt3883_sysc_wr(t , RT3883_SYSC_REG_RSTCTRL);
+
+	t &= ~RT3883_RSTCTRL_FE;
+	rt3883_sysc_wr(t, RT3883_SYSC_REG_RSTCTRL);
+}
+
+static struct resource rt3883_eth_resources[] = {
+	{
+		.start	= RT3883_FE_BASE,
+		.end	= RT3883_FE_BASE + PAGE_SIZE - 1,
+		.flags	= IORESOURCE_MEM,
+	}, {
+		.start	= RT3883_CPU_IRQ_FE,
+		.end	= RT3883_CPU_IRQ_FE,
+		.flags	= IORESOURCE_IRQ,
+	},
+};
+
+struct ramips_eth_platform_data rt3883_eth_data = {
+	.mac		= { 0x00, 0x11, 0x22, 0x33, 0x44, 0x55 },
+	.reset_fe	= rt3883_fe_reset,
+	.min_pkt_len	= 64,
+};
+
+static struct platform_device rt3883_eth_device = {
+	.name		= "ramips_eth",
+	.resource	= rt3883_eth_resources,
+	.num_resources	= ARRAY_SIZE(rt3883_eth_resources),
+	.dev = {
+		.platform_data = &rt3883_eth_data,
+	}
+};
+
+void __init rt3883_register_ethernet(void)
+{
+	struct clk *clk;
+
+	clk = clk_get(NULL, "sys");
+	if (IS_ERR(clk))
+		panic("unable to get SYS clock, err=%ld", PTR_ERR(clk));
+
+	rt3883_eth_data.sys_freq = clk_get_rate(clk);
+
+	platform_device_register(&rt3883_eth_device);
+}
+
+static struct resource rt3883_wlan_resources[] = {
+	{
+		.start	= RT3883_WLAN_BASE,
+		.end	= RT3883_WLAN_BASE + 0x3FFFF,
+		.flags	= IORESOURCE_MEM,
+	}, {
+		.start	= RT3883_CPU_IRQ_WLAN,
+		.end	= RT3883_CPU_IRQ_WLAN,
+		.flags	= IORESOURCE_IRQ,
+	},
+};
+
+static struct rt2x00_platform_data rt3883_wlan_data = {
+	.eeprom_file_name	= "rt3883.eeprom",
+};
+
+static struct platform_device rt3883_wlan_device = {
+	.name		= "rt2800_wmac",
+	.resource	= rt3883_wlan_resources,
+	.num_resources	= ARRAY_SIZE(rt3883_wlan_resources),
+	.dev = {
+		.platform_data = &rt3883_wlan_data,
+	}
+};
+
+void __init rt3883_register_wlan(void)
+{
+	platform_device_register(&rt3883_wlan_device);
+}
+
+static struct resource rt3883_wdt_resources[] = {
+	{
+		.start	= RT3883_TIMER_BASE,
+		.end	= RT3883_TIMER_BASE + RT3883_TIMER_SIZE - 1,
+		.flags	= IORESOURCE_MEM,
+	},
+};
+
+static struct platform_device rt3883_wdt_device = {
+	.name		= "ramips-wdt",
+	.id		= -1,
+	.resource	= rt3883_wdt_resources,
+	.num_resources	= ARRAY_SIZE(rt3883_wdt_resources),
+};
+
+void __init rt3883_register_wdt(bool enable_reset)
+{
+	if (enable_reset) {
+		u32 t;
+
+		/* enable WDT reset output on GPIO 2 */
+		t = rt3883_sysc_rr(RT3883_SYSC_REG_SYSCFG1);
+		t |= RT3883_SYSCFG1_GPIO2_AS_WDT_OUT;
+		rt3883_sysc_wr(t, RT3883_SYSC_REG_SYSCFG1);
+	}
+
+	platform_device_register(&rt3883_wdt_device);
+}
+
+static struct resource rt3883_nand_resources[] = {
+	{
+		.flags	= IORESOURCE_MEM,
+		.start	= RT3883_NANDC_BASE,
+		.end	= RT3883_NANDC_BASE + RT3883_NANDC_SIZE - 1,
+	},
+};
+
+static struct ramips_nand_platform_data rt3883_nand_data;
+
+static struct platform_device rt3883_nand_device = {
+	.name		= RAMIPS_NAND_DRIVER_NAME,
+	.id		= -1,
+	.resource	= rt3883_nand_resources,
+	.num_resources	= ARRAY_SIZE(rt3883_nand_resources),
+	.dev	= {
+		.platform_data = &rt3883_nand_data,
+	},
+};
+
+void __init rt3883_register_nand(struct mtd_partition *parts, int nr_parts)
+{
+	rt3883_nand_data.parts = parts;
+	rt3883_nand_data.nr_parts = nr_parts;
+	platform_device_register(&rt3883_nand_device);
+}
diff --git a/target/linux/ramips/files/arch/mips/ralink/rt3883/devices.h b/target/linux/ramips/files/arch/mips/ralink/rt3883/devices.h
new file mode 100644
index 0000000000..4b460e3555
--- /dev/null
+++ b/target/linux/ramips/files/arch/mips/ralink/rt3883/devices.h
@@ -0,0 +1,29 @@
+/*
+ * Ralink RT3662/3883 SoC specific platform device definitions
+ *
+ * Copyright (C) 2011-2012 Gabor Juhos <juhosg@openwrt.org>
+ *
+ * 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.
+ */
+
+#ifndef _RT3883_DEVICES_H
+#define _RT3883_DEVICES_H
+
+struct physmap_flash_data;
+
+extern struct physmap_flash_data rt3883_flash0_data;
+extern struct physmap_flash_data rt3883_flash1_data;
+void rt3883_register_pflash(unsigned int id);
+
+struct mtd_partition;
+void rt3883_register_nand(struct mtd_partition *parts, int nr_parts);
+
+extern struct ramips_eth_platform_data rt3883_eth_data;
+void rt3883_register_ethernet(void);
+void rt3883_register_usbhost(void);
+void rt3883_register_wlan(void);
+void rt3883_register_wdt(bool enable_reset);
+
+#endif  /* _RT3883_DEVICES_H */
diff --git a/target/linux/ramips/files/arch/mips/ralink/rt3883/early_printk.c b/target/linux/ramips/files/arch/mips/ralink/rt3883/early_printk.c
new file mode 100644
index 0000000000..e3bf7ba339
--- /dev/null
+++ b/target/linux/ramips/files/arch/mips/ralink/rt3883/early_printk.c
@@ -0,0 +1,29 @@
+/*
+ *  Ralink RT3662/RT3883 SoC early printk support
+ *
+ *  Copyright (C) 2011-2012 Gabor Juhos <juhosg@openwrt.org>
+ *
+ *  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/io.h>
+#include <linux/serial_reg.h>
+
+#include <asm/addrspace.h>
+
+#include <asm/mach-ralink/rt3883_regs.h>
+
+#define UART_READ(r) \
+	__raw_readl((void __iomem *)(KSEG1ADDR(RT3883_UART1_BASE) + 4 * (r)))
+
+#define UART_WRITE(r, v) \
+	__raw_writel((v), (void __iomem *)(KSEG1ADDR(RT3883_UART1_BASE) + 4 * (r)))
+
+void prom_putchar(unsigned char ch)
+{
+	while (((UART_READ(RT3883_UART_REG_LSR)) & UART_LSR_THRE) == 0);
+	UART_WRITE(RT3883_UART_REG_TX, ch);
+	while (((UART_READ(RT3883_UART_REG_LSR)) & UART_LSR_THRE) == 0);
+}
diff --git a/target/linux/ramips/files/arch/mips/ralink/rt3883/irq.c b/target/linux/ramips/files/arch/mips/ralink/rt3883/irq.c
new file mode 100644
index 0000000000..b561fd38cd
--- /dev/null
+++ b/target/linux/ramips/files/arch/mips/ralink/rt3883/irq.c
@@ -0,0 +1,84 @@
+/*
+ *  Ralink RT3662/RT3883 SoC specific interrupt handling
+ *
+ *  Copyright (C) 2011-2012 Gabor Juhos <juhosg@openwrt.org>
+ *
+ *  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/kernel.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+
+#include <asm/irq_cpu.h>
+#include <asm/mipsregs.h>
+
+#include <asm/mach-ralink/common.h>
+#include <asm/mach-ralink/rt3883.h>
+#include <asm/mach-ralink/rt3883_regs.h>
+
+static void rt3883_intc_irq_dispatch(void)
+{
+	u32 pending;
+
+	pending = ramips_intc_get_status();
+
+	if (pending & RT3883_INTC_INT_TIMER0)
+		do_IRQ(RT3883_INTC_IRQ_TIMER0);
+
+	else if (pending & RT3883_INTC_INT_TIMER1)
+		do_IRQ(RT3883_INTC_IRQ_TIMER1);
+
+	else if (pending & RT3883_INTC_INT_UART0)
+		do_IRQ(RT3883_INTC_IRQ_UART0);
+
+	else if (pending & RT3883_INTC_INT_UART1)
+		do_IRQ(RT3883_INTC_IRQ_UART1);
+
+	else if (pending & RT3883_INTC_INT_PERFC)
+		do_IRQ(RT3883_INTC_IRQ_PERFC);
+
+	else if (pending & RT3883_INTC_INT_UHST)
+		do_IRQ(RT3883_INTC_IRQ_UHST);
+
+	/* TODO: handle PIO interrupts as well */
+
+	else
+		spurious_interrupt();
+}
+
+asmlinkage void plat_irq_dispatch(void)
+{
+	unsigned long pending;
+
+	pending = read_c0_status() & read_c0_cause() & ST0_IM;
+
+	if (pending & STATUSF_IP7)
+		do_IRQ(RT3883_CPU_IRQ_COUNTER);
+
+	else if (pending & STATUSF_IP5)
+		do_IRQ(RT3883_CPU_IRQ_FE);
+
+	else if (pending & STATUSF_IP6)
+		do_IRQ(RT3883_CPU_IRQ_WLAN);
+
+	else if (pending & STATUSF_IP4)
+		do_IRQ(RT3883_CPU_IRQ_PCI);
+
+	else if (pending & STATUSF_IP2)
+		rt3883_intc_irq_dispatch();
+
+	else
+		spurious_interrupt();
+}
+
+void __init arch_init_irq(void)
+{
+	mips_cpu_irq_init();
+	ramips_intc_irq_init(RT3883_INTC_BASE, RT3883_CPU_IRQ_INTC,
+			     RT3883_INTC_IRQ_BASE);
+	cp0_perfcount_irq = RT3883_INTC_IRQ_PERFC;
+}
diff --git a/target/linux/ramips/files/arch/mips/ralink/rt3883/rt3883.c b/target/linux/ramips/files/arch/mips/ralink/rt3883/rt3883.c
new file mode 100644
index 0000000000..6e75b390f8
--- /dev/null
+++ b/target/linux/ramips/files/arch/mips/ralink/rt3883/rt3883.c
@@ -0,0 +1,211 @@
+/*
+ * Ralink RT3662/RT3883 SoC specific setup
+ *
+ * Copyright (C) 2011-2012 Gabor Juhos <juhosg@openwrt.org>
+ *
+ * Parts of this file are based on Ralink's 2.6.21 BSP
+ *
+ * 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/kernel.h>
+#include <linux/init.h>
+#include <linux/module.h>
+
+#include <asm/mach-ralink/common.h>
+#include <asm/mach-ralink/ramips_gpio.h>
+#include <asm/mach-ralink/rt3883.h>
+#include <asm/mach-ralink/rt3883_regs.h>
+
+void __iomem * rt3883_sysc_base;
+void __iomem * rt3883_memc_base;
+
+void __init rt3883_detect_sys_type(void)
+{
+	u32 n0;
+	u32 n1;
+	u32 id;
+
+	n0 = rt3883_sysc_rr(RT3883_SYSC_REG_CHIPID0_3);
+	n1 = rt3883_sysc_rr(RT3883_SYSC_REG_CHIPID4_7);
+	id = rt3883_sysc_rr(RT3883_SYSC_REG_REVID);
+
+	snprintf(ramips_sys_type, RAMIPS_SYS_TYPE_LEN,
+		"Ralink %c%c%c%c%c%c%c%c ver:%u eco:%u",
+		(char) (n0 & 0xff), (char) ((n0 >> 8) & 0xff),
+		(char) ((n0 >> 16) & 0xff), (char) ((n0 >> 24) & 0xff),
+		(char) (n1 & 0xff), (char) ((n1 >> 8) & 0xff),
+		(char) ((n1 >> 16) & 0xff), (char) ((n1 >> 24) & 0xff),
+		(id >> RT3883_REVID_VER_ID_SHIFT) & RT3883_REVID_VER_ID_MASK,
+		(id & RT3883_REVID_ECO_ID_MASK));
+}
+
+static struct ramips_gpio_chip rt3883_gpio_chips[] = {
+	{
+		.chip = {
+			.label			= "RT3883-GPIO0",
+			.base			= 0,
+			.ngpio			= 24,
+		},
+		.regs = {
+			[RAMIPS_GPIO_REG_INT]	= 0x00,
+			[RAMIPS_GPIO_REG_EDGE]	= 0x04,
+			[RAMIPS_GPIO_REG_RENA]	= 0x08,
+			[RAMIPS_GPIO_REG_FENA]	= 0x0c,
+			[RAMIPS_GPIO_REG_DATA]	= 0x20,
+			[RAMIPS_GPIO_REG_DIR]	= 0x24,
+			[RAMIPS_GPIO_REG_POL]	= 0x28,
+			[RAMIPS_GPIO_REG_SET]	= 0x2c,
+			[RAMIPS_GPIO_REG_RESET]	= 0x30,
+			[RAMIPS_GPIO_REG_TOGGLE] = 0x34,
+		},
+		.map_base	= RT3883_PIO_BASE,
+		.map_size	= RT3883_PIO_SIZE,
+	},
+	{
+		.chip = {
+			.label			= "RT3883-GPIO1",
+			.base			= 24,
+			.ngpio			= 16,
+		},
+		.regs = {
+			[RAMIPS_GPIO_REG_INT]	= 0x38,
+			[RAMIPS_GPIO_REG_EDGE]	= 0x3c,
+			[RAMIPS_GPIO_REG_RENA]	= 0x40,
+			[RAMIPS_GPIO_REG_FENA]	= 0x44,
+			[RAMIPS_GPIO_REG_DATA]	= 0x48,
+			[RAMIPS_GPIO_REG_DIR]	= 0x4c,
+			[RAMIPS_GPIO_REG_POL]	= 0x50,
+			[RAMIPS_GPIO_REG_SET]	= 0x54,
+			[RAMIPS_GPIO_REG_RESET]	= 0x58,
+			[RAMIPS_GPIO_REG_TOGGLE] = 0x5c,
+		},
+		.map_base	= RT3883_PIO_BASE,
+		.map_size	= RT3883_PIO_SIZE,
+	},
+	{
+		.chip = {
+			.label			= "RT3883-GPIO2",
+			.base			= 40,
+			.ngpio			= 32,
+		},
+		.regs = {
+			[RAMIPS_GPIO_REG_INT]	= 0x60,
+			[RAMIPS_GPIO_REG_EDGE]	= 0x64,
+			[RAMIPS_GPIO_REG_RENA]	= 0x68,
+			[RAMIPS_GPIO_REG_FENA]	= 0x6c,
+			[RAMIPS_GPIO_REG_DATA]	= 0x70,
+			[RAMIPS_GPIO_REG_DIR]	= 0x74,
+			[RAMIPS_GPIO_REG_POL]	= 0x78,
+			[RAMIPS_GPIO_REG_SET]	= 0x7c,
+			[RAMIPS_GPIO_REG_RESET]	= 0x80,
+			[RAMIPS_GPIO_REG_TOGGLE] = 0x84,
+		},
+		.map_base	= RT3883_PIO_BASE,
+		.map_size	= RT3883_PIO_SIZE,
+	},
+	{
+		.chip = {
+			.label			= "RT3883-GPIO3",
+			.base			= 72,
+			.ngpio			= 24,
+		},
+		.regs = {
+			[RAMIPS_GPIO_REG_INT]	= 0x88,
+			[RAMIPS_GPIO_REG_EDGE]	= 0x8c,
+			[RAMIPS_GPIO_REG_RENA]	= 0x90,
+			[RAMIPS_GPIO_REG_FENA]	= 0x94,
+			[RAMIPS_GPIO_REG_DATA]	= 0x98,
+			[RAMIPS_GPIO_REG_DIR]	= 0x9c,
+			[RAMIPS_GPIO_REG_POL]	= 0xa0,
+			[RAMIPS_GPIO_REG_SET]	= 0xa4,
+			[RAMIPS_GPIO_REG_RESET]	= 0xa8,
+			[RAMIPS_GPIO_REG_TOGGLE] = 0xac,
+		},
+		.map_base	= RT3883_PIO_BASE,
+		.map_size	= RT3883_PIO_SIZE,
+	},
+};
+
+static struct ramips_gpio_data rt3883_gpio_data = {
+	.chips = rt3883_gpio_chips,
+	.num_chips = ARRAY_SIZE(rt3883_gpio_chips),
+};
+
+static void rt3883_gpio_reserve(int first, int last)
+{
+	for (; first <= last; first++)
+		gpio_request(first, "reserved");
+}
+
+void __init rt3883_gpio_init(u32 mode)
+{
+	u32 t;
+
+	rt3883_sysc_wr(mode, RT3883_SYSC_REG_GPIO_MODE);
+
+	ramips_gpio_init(&rt3883_gpio_data);
+	if ((mode & RT3883_GPIO_MODE_I2C) == 0)
+		rt3883_gpio_reserve(RT3883_GPIO_I2C_SD, RT3883_GPIO_I2C_SCLK);
+
+	if ((mode & RT3883_GPIO_MODE_SPI) == 0)
+		rt3883_gpio_reserve(RT3883_GPIO_SPI_CS0, RT3883_GPIO_SPI_CLK);
+
+	t = mode >> RT3883_GPIO_MODE_UART0_SHIFT;
+	t &= RT3883_GPIO_MODE_UART0_MASK;
+	switch (t) {
+	case RT3883_GPIO_MODE_UARTF:
+	case RT3883_GPIO_MODE_PCM_UARTF:
+	case RT3883_GPIO_MODE_PCM_I2S:
+	case RT3883_GPIO_MODE_I2S_UARTF:
+		rt3883_gpio_reserve(RT3883_GPIO_7, RT3883_GPIO_14);
+		break;
+	case RT3883_GPIO_MODE_PCM_GPIO:
+		rt3883_gpio_reserve(RT3883_GPIO_11, RT3883_GPIO_14);
+		break;
+	case RT3883_GPIO_MODE_GPIO_UARTF:
+	case RT3883_GPIO_MODE_GPIO_I2S:
+		rt3883_gpio_reserve(RT3883_GPIO_7, RT3883_GPIO_10);
+		break;
+	}
+
+	if ((mode & RT3883_GPIO_MODE_UART1) == 0)
+		rt3883_gpio_reserve(RT3883_GPIO_UART1_TXD,
+				    RT3883_GPIO_UART1_RXD);
+
+	if ((mode & RT3883_GPIO_MODE_JTAG) == 0)
+		rt3883_gpio_reserve(RT3883_GPIO_JTAG_TDO,
+				    RT3883_GPIO_JTAG_TCLK);
+
+	if ((mode & RT3883_GPIO_MODE_MDIO) == 0)
+		rt3883_gpio_reserve(RT3883_GPIO_MDIO_MDC,
+				    RT3883_GPIO_MDIO_MDIO);
+
+	if ((mode & RT3883_GPIO_MODE_GE1) == 0)
+		rt3883_gpio_reserve(RT3883_GPIO_GE1_TXD0,
+				    RT3883_GPIO_GE1_RXCLK);
+
+	if ((mode & RT3883_GPIO_MODE_GE2) == 0)
+		rt3883_gpio_reserve(RT3883_GPIO_GE2_TXD0,
+				    RT3883_GPIO_GE2_RXCLK);
+
+	t = mode >> RT3883_GPIO_MODE_PCI_SHIFT;
+	t &= RT3883_GPIO_MODE_PCI_MASK;
+	if (t != RT3883_GPIO_MODE_PCI_GPIO)
+		rt3883_gpio_reserve(RT3883_GPIO_PCI_AD0,
+				    RT3883_GPIO_PCI_AD31);
+
+	t = mode >> RT3883_GPIO_MODE_LNA_A_SHIFT;
+	t &= RT3883_GPIO_MODE_LNA_A_MASK;
+	if (t != RT3883_GPIO_MODE_LNA_A_GPIO)
+		rt3883_gpio_reserve(RT3883_GPIO_LNA_PE_A0,
+				    RT3883_GPIO_LNA_PE_A2);
+
+	t = mode >> RT3883_GPIO_MODE_LNA_G_SHIFT;
+	t &= RT3883_GPIO_MODE_LNA_G_MASK;
+	if (t != RT3883_GPIO_MODE_LNA_G_GPIO)
+		rt3883_gpio_reserve(RT3883_GPIO_LNA_PE_G0,
+				    RT3883_GPIO_LNA_PE_G2);
+}
diff --git a/target/linux/ramips/files/arch/mips/ralink/rt3883/setup.c b/target/linux/ramips/files/arch/mips/ralink/rt3883/setup.c
new file mode 100644
index 0000000000..f4c7296fa4
--- /dev/null
+++ b/target/linux/ramips/files/arch/mips/ralink/rt3883/setup.c
@@ -0,0 +1,89 @@
+/*
+ * Ralink RT3662/RT3883 SoC specific setup
+ *
+ * Copyright (C) 2011-2012 Gabor Juhos <juhosg@openwrt.org>
+ *
+ * Parts of this file are based on Ralink's 2.6.21 BSP
+ *
+ * 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/kernel.h>
+#include <linux/init.h>
+#include <linux/io.h>
+#include <linux/err.h>
+#include <linux/clk.h>
+
+#include <asm/mips_machine.h>
+#include <asm/reboot.h>
+#include <asm/time.h>
+
+#include <asm/mach-ralink/common.h>
+#include <asm/mach-ralink/rt3883.h>
+#include <asm/mach-ralink/rt3883_regs.h>
+#include "common.h"
+
+static void rt3883_restart(char *command)
+{
+	rt3883_sysc_wr(RT3883_RSTCTRL_SYS, RT3883_SYSC_REG_RSTCTRL);
+	while (1)
+		if (cpu_wait)
+			cpu_wait();
+}
+
+static void rt3883_halt(void)
+{
+	while (1)
+		if (cpu_wait)
+			cpu_wait();
+}
+
+unsigned int __cpuinit get_c0_compare_irq(void)
+{
+	return CP0_LEGACY_COMPARE_IRQ;
+}
+
+void __init ramips_soc_setup(void)
+{
+	struct clk *clk;
+
+	rt3883_sysc_base = ioremap_nocache(RT3883_SYSC_BASE, PAGE_SIZE);
+	rt3883_memc_base = ioremap_nocache(RT3883_MEMC_BASE, PAGE_SIZE);
+
+	rt3883_detect_sys_type();
+	rt3883_clocks_init();
+
+	clk = clk_get(NULL, "cpu");
+	if (IS_ERR(clk))
+		panic("unable to get CPU clock, err=%ld", PTR_ERR(clk));
+
+	printk(KERN_INFO "%s running at %lu.%02lu MHz\n", ramips_sys_type,
+		clk_get_rate(clk) / 1000000,
+		(clk_get_rate(clk) % 1000000) * 100 / 1000000);
+
+	_machine_restart = rt3883_restart;
+	_machine_halt = rt3883_halt;
+	pm_power_off = rt3883_halt;
+
+	clk = clk_get(NULL, "uart");
+	if (IS_ERR(clk))
+		panic("unable to get UART clock, err=%ld", PTR_ERR(clk));
+
+	ramips_early_serial_setup(0, RT3883_UART0_BASE, clk_get_rate(clk),
+				  RT3883_INTC_IRQ_UART0);
+	ramips_early_serial_setup(1, RT3883_UART1_BASE, clk_get_rate(clk),
+				  RT3883_INTC_IRQ_UART1);
+}
+
+void __init plat_time_init(void)
+{
+	struct clk *clk;
+
+	clk = clk_get(NULL, "cpu");
+	if (IS_ERR(clk))
+		panic("unable to get CPU clock, err=%ld", PTR_ERR(clk));
+
+	mips_hpt_frequency = clk_get_rate(clk) / 2;
+}
diff --git a/target/linux/ramips/files/drivers/usb/host/ehci-rt3883.c b/target/linux/ramips/files/drivers/usb/host/ehci-rt3883.c
new file mode 100644
index 0000000000..d22bd73b94
--- /dev/null
+++ b/target/linux/ramips/files/drivers/usb/host/ehci-rt3883.c
@@ -0,0 +1,162 @@
+/*
+ *  Bus Glue for the built-in EHCI controller of the Ralink RT3662/RT3883 SoCs
+ *
+ *  Copyright (C) 2011-2012 Gabor Juhos <juhosg@openwrt.org>
+ *
+ *  Parts of this file are based on Ralink's 2.6.21 BSP
+ *
+ *  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/platform_device.h>
+#include <asm/mach-ralink/rt3883.h>
+#include <asm/mach-ralink/rt3883_ehci_platform.h>
+
+static int ehci_rt3883_init(struct usb_hcd *hcd)
+{
+	struct ehci_hcd *ehci = hcd_to_ehci(hcd);
+	int ret;
+
+	ehci->caps = hcd->regs;
+	ehci->regs = hcd->regs +
+		     HC_LENGTH(ehci_readl(ehci, &ehci->caps->hc_capbase));
+	dbg_hcs_params(ehci, "reset");
+	dbg_hcc_params(ehci, "reset");
+
+	ehci->hcs_params = ehci_readl(ehci, &ehci->caps->hcs_params);
+	ehci->sbrn = 0x20;
+
+	ehci_reset(ehci);
+
+	ret = ehci_init(hcd);
+	if (ret)
+		return ret;
+
+	ehci_port_power(ehci, 0);
+
+	return 0;
+}
+
+static const struct hc_driver ehci_rt3883_hc_driver = {
+	.description		= hcd_name,
+	.product_desc		= "Ralink RT3883 built-in EHCI controller",
+	.hcd_priv_size		= sizeof(struct ehci_hcd),
+	.irq			= ehci_irq,
+	.flags			= HCD_MEMORY | HCD_USB2,
+
+	.reset			= ehci_rt3883_init,
+	.start			= ehci_run,
+	.stop			= ehci_stop,
+	.shutdown		= ehci_shutdown,
+
+	.urb_enqueue		= ehci_urb_enqueue,
+	.urb_dequeue		= ehci_urb_dequeue,
+	.endpoint_disable	= ehci_endpoint_disable,
+	.endpoint_reset		= ehci_endpoint_reset,
+
+	.get_frame_number	= ehci_get_frame,
+
+	.hub_status_data	= ehci_hub_status_data,
+	.hub_control		= ehci_hub_control,
+	.relinquish_port	= ehci_relinquish_port,
+	.port_handed_over	= ehci_port_handed_over,
+
+	.clear_tt_buffer_complete = ehci_clear_tt_buffer_complete,
+};
+
+static int ehci_rt3883_probe(struct platform_device *pdev)
+{
+	struct rt3883_ehci_platform_data *pdata;
+	struct usb_hcd *hcd;
+	struct resource *res;
+	int irq;
+	int ret;
+
+	if (usb_disabled())
+		return -ENODEV;
+
+	res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
+	if (!res) {
+		dev_dbg(&pdev->dev, "no IRQ specified for %s\n",
+			dev_name(&pdev->dev));
+		return -ENODEV;
+	}
+	irq = res->start;
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	if (!res) {
+		dev_dbg(&pdev->dev, "no base address specified for %s\n",
+			dev_name(&pdev->dev));
+		return -ENODEV;
+	}
+
+	hcd = usb_create_hcd(&ehci_rt3883_hc_driver, &pdev->dev,
+			     dev_name(&pdev->dev));
+	if (!hcd)
+		return -ENOMEM;
+
+	hcd->rsrc_start	= res->start;
+	hcd->rsrc_len	= res->end - res->start + 1;
+
+	if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
+		dev_dbg(&pdev->dev, "controller already in use\n");
+		ret = -EBUSY;
+		goto err_put_hcd;
+	}
+
+	hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
+	if (!hcd->regs) {
+		dev_dbg(&pdev->dev, "error mapping memory\n");
+		ret = -EFAULT;
+		goto err_release_region;
+	}
+
+	pdata = pdev->dev.platform_data;
+	if (pdata && pdata->start_hw)
+		pdata->start_hw();
+
+	ret = usb_add_hcd(hcd, irq, IRQF_SHARED);
+	if (ret)
+		goto err_iounmap;
+
+	return 0;
+
+err_iounmap:
+	iounmap(hcd->regs);
+
+err_release_region:
+	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
+err_put_hcd:
+	usb_put_hcd(hcd);
+	return ret;
+}
+
+static int ehci_rt3883_remove(struct platform_device *pdev)
+{
+	struct usb_hcd *hcd = platform_get_drvdata(pdev);
+	struct rt3883_ehci_platform_data *pdata;
+
+	usb_remove_hcd(hcd);
+	iounmap(hcd->regs);
+	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
+	usb_put_hcd(hcd);
+
+	pdata = pdev->dev.platform_data;
+	if (pdata && pdata->stop_hw)
+		pdata->stop_hw();
+
+	return 0;
+}
+
+static struct platform_driver ehci_rt3883_driver = {
+	.probe		= ehci_rt3883_probe,
+	.remove		= ehci_rt3883_remove,
+	.driver = {
+		.owner	= THIS_MODULE,
+		.name	= "rt3883-ehci",
+	}
+};
+
+MODULE_ALIAS("platform:rt3883-ehci");
diff --git a/target/linux/ramips/files/drivers/usb/host/ohci-rt3883.c b/target/linux/ramips/files/drivers/usb/host/ohci-rt3883.c
new file mode 100644
index 0000000000..ea13aebe5e
--- /dev/null
+++ b/target/linux/ramips/files/drivers/usb/host/ohci-rt3883.c
@@ -0,0 +1,161 @@
+/*
+ *  Bus Glue for the built-in OHCI controller of the Ralink RT3662/RT3883 SoCs
+ *
+ *  Copyright (C) 2011-2012 Gabor Juhos <juhosg@openwrt.org>
+ *
+ *  Parts of this file are based on Ralink's 2.6.21 BSP
+ *
+ *  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/platform_device.h>
+#include <asm/mach-ralink/rt3883.h>
+#include <asm/mach-ralink/rt3883_ohci_platform.h>
+
+static int __devinit ohci_rt3883_start(struct usb_hcd *hcd)
+{
+	struct ohci_hcd	*ohci = hcd_to_ohci(hcd);
+	int ret;
+
+	ret = ohci_init(ohci);
+	if (ret < 0)
+		return ret;
+
+	ret = ohci_run(ohci);
+	if (ret < 0)
+		goto err;
+
+	return 0;
+
+err:
+	ohci_stop(hcd);
+	return ret;
+}
+
+static const struct hc_driver ohci_rt3883_hc_driver = {
+	.description		= hcd_name,
+	.product_desc		= "Ralink RT3883 built-in OHCI controller",
+	.hcd_priv_size		= sizeof(struct ohci_hcd),
+
+	.irq			= ohci_irq,
+	.flags			= HCD_USB11 | HCD_MEMORY,
+
+	.start			= ohci_rt3883_start,
+	.stop			= ohci_stop,
+	.shutdown		= ohci_shutdown,
+
+	.urb_enqueue		= ohci_urb_enqueue,
+	.urb_dequeue		= ohci_urb_dequeue,
+	.endpoint_disable	= ohci_endpoint_disable,
+
+	/*
+	 * scheduling support
+	 */
+	.get_frame_number	= ohci_get_frame,
+
+	/*
+	 * root hub support
+	 */
+	.hub_status_data	= ohci_hub_status_data,
+	.hub_control		= ohci_hub_control,
+	.start_port_reset	= ohci_start_port_reset,
+};
+
+static int ohci_rt3883_probe(struct platform_device *pdev)
+{
+	struct rt3883_ohci_platform_data *pdata;
+	struct usb_hcd *hcd;
+	struct resource *res;
+	int irq;
+	int ret;
+
+	if (usb_disabled())
+		return -ENODEV;
+
+	res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
+	if (!res) {
+		dev_dbg(&pdev->dev, "no IRQ specified for %s\n",
+			dev_name(&pdev->dev));
+		return -ENODEV;
+	}
+	irq = res->start;
+
+	hcd = usb_create_hcd(&ohci_rt3883_hc_driver,
+			     &pdev->dev, dev_name(&pdev->dev));
+	if (!hcd)
+		return -ENOMEM;
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	if (!res) {
+		dev_dbg(&pdev->dev, "no base address specified for %s\n",
+			dev_name(&pdev->dev));
+		ret = -ENODEV;
+		goto err_put_hcd;
+	}
+	hcd->rsrc_start	= res->start;
+	hcd->rsrc_len	= res->end - res->start + 1;
+
+	if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
+		dev_dbg(&pdev->dev, "controller already in use\n");
+		ret = -EBUSY;
+		goto err_put_hcd;
+	}
+
+	hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
+	if (!hcd->regs) {
+		dev_dbg(&pdev->dev, "error mapping memory\n");
+		ret = -EFAULT;
+		goto err_release_region;
+	}
+
+	pdata = pdev->dev.platform_data;
+	if (pdata && pdata->start_hw)
+		pdata->start_hw();
+
+	ohci_hcd_init(hcd_to_ohci(hcd));
+
+	ret = usb_add_hcd(hcd, irq, IRQF_SHARED);
+	if (ret)
+		goto err_stop_hcd;
+
+	return 0;
+
+err_stop_hcd:
+	iounmap(hcd->regs);
+err_release_region:
+	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
+err_put_hcd:
+	usb_put_hcd(hcd);
+	return ret;
+}
+
+static int ohci_rt3883_remove(struct platform_device *pdev)
+{
+	struct usb_hcd *hcd = platform_get_drvdata(pdev);
+	struct rt3883_ohci_platform_data *pdata;
+
+	usb_remove_hcd(hcd);
+	iounmap(hcd->regs);
+	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
+	usb_put_hcd(hcd);
+
+	pdata = pdev->dev.platform_data;
+	if (pdata && pdata->stop_hw)
+		pdata->stop_hw();
+
+	return 0;
+}
+
+static struct platform_driver ohci_rt3883_driver = {
+	.probe		= ohci_rt3883_probe,
+	.remove		= ohci_rt3883_remove,
+	.shutdown	= usb_hcd_platform_shutdown,
+	.driver		= {
+		.name	= "rt3883-ohci",
+		.owner	= THIS_MODULE,
+	},
+};
+
+MODULE_ALIAS("platform:rt3883-ohci");