From c8c69923236f2f3f184ddcc7eb41c113b5cc3223 Mon Sep 17 00:00:00 2001
From: John Crispin <blogic@openwrt.org>
Date: Sun, 27 Jul 2014 10:57:40 +0100
Subject: [PATCH 12/57] MIPS: ralink: add MT7621 support

Signed-off-by: John Crispin <blogic@openwrt.org>
---
 arch/mips/include/asm/gic.h                |    4 +
 arch/mips/include/asm/mach-ralink/irq.h    |    9 +
 arch/mips/include/asm/mach-ralink/mt7621.h |   39 ++++
 arch/mips/kernel/vmlinux.lds.S             |    1 +
 arch/mips/ralink/Kconfig                   |   18 ++
 arch/mips/ralink/Makefile                  |    7 +-
 arch/mips/ralink/Platform                  |    5 +
 arch/mips/ralink/irq-gic.c                 |  271 ++++++++++++++++++++++++++++
 arch/mips/ralink/malta-amon.c              |   81 +++++++++
 arch/mips/ralink/mt7621.c                  |  183 +++++++++++++++++++
 10 files changed, 617 insertions(+), 1 deletion(-)
 create mode 100644 arch/mips/include/asm/mach-ralink/irq.h
 create mode 100644 arch/mips/include/asm/mach-ralink/mt7621.h
 create mode 100644 arch/mips/ralink/irq-gic.c
 create mode 100644 arch/mips/ralink/malta-amon.c
 create mode 100644 arch/mips/ralink/mt7621.c

--- a/arch/mips/include/asm/gic.h
+++ b/arch/mips/include/asm/gic.h
@@ -19,7 +19,11 @@
 #define GIC_TRIG_EDGE			1
 #define GIC_TRIG_LEVEL			0
 
+#define GIC_NUM_INTRS			64
+
+#ifndef GIC_NUM_INTRS
 #define GIC_NUM_INTRS			(24 + NR_CPUS * 2)
+#endif
 
 #define MSK(n) ((1 << (n)) - 1)
 #define REG32(addr)		(*(volatile unsigned int *) (addr))
--- /dev/null
+++ b/arch/mips/include/asm/mach-ralink/irq.h
@@ -0,0 +1,9 @@
+#ifndef __ASM_MACH_RALINK_IRQ_H
+#define __ASM_MACH_RALINK_IRQ_H
+
+#define GIC_NUM_INTRS	64
+#define NR_IRQS 256
+
+#include_next <irq.h>
+
+#endif
--- /dev/null
+++ b/arch/mips/include/asm/mach-ralink/mt7621.h
@@ -0,0 +1,39 @@
+/*
+ * 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.
+ *
+ * Parts of this file are based on Ralink's 2.6.21 BSP
+ *
+ * Copyright (C) 2008-2011 Gabor Juhos <juhosg@openwrt.org>
+ * Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org>
+ * Copyright (C) 2013 John Crispin <blogic@openwrt.org>
+ */
+
+#ifndef _MT7621_REGS_H_
+#define _MT7621_REGS_H_
+
+#define MT7621_SYSC_BASE		0x1E000000
+
+#define SYSC_REG_CHIP_NAME0		0x00
+#define SYSC_REG_CHIP_NAME1		0x04
+#define SYSC_REG_CHIP_REV		0x0c
+#define SYSC_REG_SYSTEM_CONFIG0		0x10
+#define SYSC_REG_SYSTEM_CONFIG1		0x14
+
+#define CHIP_REV_PKG_MASK		0x1
+#define CHIP_REV_PKG_SHIFT		16
+#define CHIP_REV_VER_MASK		0xf
+#define CHIP_REV_VER_SHIFT		8
+#define CHIP_REV_ECO_MASK		0xf
+
+#define MT7621_DRAM_BASE                0x0
+#define MT7621_DDR2_SIZE_MIN		32
+#define MT7621_DDR2_SIZE_MAX		256
+
+#define MT7621_CHIP_NAME0		0x3637544D
+#define MT7621_CHIP_NAME1		0x20203132
+
+#define MIPS_GIC_IRQ_BASE           (MIPS_CPU_IRQ_BASE + 8)
+
+#endif
--- a/arch/mips/kernel/vmlinux.lds.S
+++ b/arch/mips/kernel/vmlinux.lds.S
@@ -51,6 +51,7 @@ SECTIONS
 	/* read-only */
 	_text = .;	/* Text and read-only data */
 	.text : {
+		/*. = . + 0x8000; */
 		TEXT_TEXT
 		SCHED_TEXT
 		LOCK_TEXT
--- a/arch/mips/ralink/Kconfig
+++ b/arch/mips/ralink/Kconfig
@@ -7,6 +7,11 @@ config CLKEVT_RT3352
 	select CLKSRC_OF
 	select CLKSRC_MMIO
 
+config IRQ_INTC
+	bool
+	default y
+	depends on !SOC_MT7621
+
 choice
 	prompt "Ralink SoC selection"
 	default SOC_RT305X
@@ -34,6 +39,15 @@ choice
 		select USB_ARCH_HAS_OHCI
 		select USB_ARCH_HAS_EHCI
 
+	config SOC_MT7621
+		bool "MT7621"
+		select MIPS_CPU_SCACHE
+		select SYS_SUPPORTS_MULTITHREADING
+		select SYS_SUPPORTS_SMP
+		select SYS_SUPPORTS_MIPS_CMP
+		select IRQ_GIC
+		select HW_HAS_PCI
+
 endchoice
 
 choice
@@ -61,6 +75,10 @@ choice
 		bool "MT7620A eval kit"
 		depends on SOC_MT7620
 
+	config DTB_MT7621_EVAL
+		bool "MT7621 eval kit"
+		depends on SOC_MT7621
+
 endchoice
 
 endif
--- a/arch/mips/ralink/Makefile
+++ b/arch/mips/ralink/Makefile
@@ -6,16 +6,21 @@
 # Copyright (C) 2009-2011 Gabor Juhos <juhosg@openwrt.org>
 # Copyright (C) 2013 John Crispin <blogic@openwrt.org>
 
-obj-y := prom.o of.o reset.o clk.o irq.o timer.o
+obj-y := prom.o of.o reset.o clk.o timer.o
 
 obj-$(CONFIG_CLKEVT_RT3352) += cevt-rt3352.o
 
 obj-$(CONFIG_RALINK_ILL_ACC) += ill_acc.o
 
+obj-$(CONFIG_IRQ_INTC) += irq.o
+obj-$(CONFIG_IRQ_GIC) += irq-gic.o
+obj-$(CONFIG_MIPS_MT_SMP) += malta-amon.o
+
 obj-$(CONFIG_SOC_RT288X) += rt288x.o
 obj-$(CONFIG_SOC_RT305X) += rt305x.o
 obj-$(CONFIG_SOC_RT3883) += rt3883.o
 obj-$(CONFIG_SOC_MT7620) += mt7620.o
+obj-$(CONFIG_SOC_MT7621) += mt7621.o
 
 obj-$(CONFIG_EARLY_PRINTK) += early_printk.o
 
--- a/arch/mips/ralink/Platform
+++ b/arch/mips/ralink/Platform
@@ -27,3 +27,8 @@ cflags-$(CONFIG_SOC_RT3883)	+= -I$(srctr
 #
 load-$(CONFIG_SOC_MT7620)	+= 0xffffffff80000000
 cflags-$(CONFIG_SOC_MT7620)	+= -I$(srctree)/arch/mips/include/asm/mach-ralink/mt7620
+
+# Ralink MT7621
+#
+load-$(CONFIG_SOC_MT7621)	+= 0xffffffff80001000
+cflags-$(CONFIG_SOC_MT7621)	+= -I$(srctree)/arch/mips/include/asm/mach-ralink/mt7621
--- /dev/null
+++ b/arch/mips/ralink/irq-gic.c
@@ -0,0 +1,271 @@
+#include <linux/init.h>
+#include <linux/sched.h>
+#include <linux/slab.h>
+#include <linux/interrupt.h>
+#include <linux/kernel_stat.h>
+#include <linux/hardirq.h>
+#include <linux/preempt.h>
+#include <linux/irqdomain.h>
+#include <linux/of_platform.h>
+#include <linux/of_address.h>
+#include <linux/of_irq.h>
+
+#include <asm/irq_cpu.h>
+#include <asm/mipsregs.h>
+
+#include <asm/irq.h>
+#include <asm/setup.h>
+
+#include <asm/gic.h>
+#include <asm/gcmpregs.h>
+
+#include <asm/mach-ralink/mt7621.h>
+
+unsigned long _gcmp_base;
+static int gic_resched_int_base = 56;
+static int gic_call_int_base = 60;
+static struct irq_chip *irq_gic;
+static struct gic_intr_map gic_intr_map[GIC_NUM_INTRS];
+
+#if defined(CONFIG_MIPS_MT_SMP)
+static int gic_resched_int_base;
+static int gic_call_int_base;
+
+#define GIC_RESCHED_INT(cpu) (gic_resched_int_base+(cpu))
+#define GIC_CALL_INT(cpu) (gic_call_int_base+(cpu))
+
+static irqreturn_t ipi_resched_interrupt(int irq, void *dev_id)
+{
+	scheduler_ipi();
+
+	return IRQ_HANDLED;
+}
+
+static irqreturn_t
+ipi_call_interrupt(int irq, void *dev_id)
+{
+	smp_call_function_interrupt();
+
+	return IRQ_HANDLED;
+}
+
+static struct irqaction irq_resched = {
+        .handler        = ipi_resched_interrupt,
+        .flags          = IRQF_DISABLED|IRQF_PERCPU,
+        .name           = "ipi resched"
+};
+
+static struct irqaction irq_call = {
+        .handler        = ipi_call_interrupt,
+        .flags          = IRQF_DISABLED|IRQF_PERCPU,
+        .name           = "ipi call"
+};
+
+#endif
+
+static void __init
+gic_fill_map(void)
+{
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(gic_intr_map); i++) {
+		gic_intr_map[i].cpunum = 0;
+		gic_intr_map[i].pin = GIC_CPU_INT0;
+		gic_intr_map[i].polarity = GIC_POL_POS;
+		gic_intr_map[i].trigtype = GIC_TRIG_LEVEL;
+		gic_intr_map[i].flags = GIC_FLAG_IPI;
+	}
+
+#if defined(CONFIG_MIPS_MT_SMP)
+	{
+		int cpu;
+
+		gic_call_int_base = ARRAY_SIZE(gic_intr_map) - nr_cpu_ids;
+		gic_resched_int_base = gic_call_int_base - nr_cpu_ids;
+
+		i = gic_resched_int_base;
+
+		for (cpu = 0; cpu < nr_cpu_ids; cpu++) {
+			gic_intr_map[i + cpu].cpunum = cpu;
+			gic_intr_map[i + cpu].pin = GIC_CPU_INT1;
+			gic_intr_map[i + cpu].trigtype = GIC_TRIG_EDGE;
+
+			gic_intr_map[i + cpu + nr_cpu_ids].cpunum = cpu;
+			gic_intr_map[i + cpu + nr_cpu_ids].pin = GIC_CPU_INT2;
+			gic_intr_map[i + cpu + nr_cpu_ids].trigtype = GIC_TRIG_EDGE;
+		}
+	}
+#endif
+}
+
+void
+gic_irq_ack(struct irq_data *d)
+{
+	int irq = (d->irq - gic_irq_base);
+
+	GIC_CLR_INTR_MASK(irq);
+
+	if (gic_irq_flags[irq] & GIC_TRIG_EDGE)
+		GICWRITE(GIC_REG(SHARED, GIC_SH_WEDGE), irq);
+}
+
+void
+gic_finish_irq(struct irq_data *d)
+{
+	GIC_SET_INTR_MASK(d->irq - gic_irq_base);
+}
+
+void __init
+gic_platform_init(int irqs, struct irq_chip *irq_controller)
+{
+	irq_gic = irq_controller;
+}
+
+static void
+gic_irqdispatch(void)
+{
+	unsigned int irq = gic_get_int();
+
+	if (likely(irq < GIC_NUM_INTRS))
+		do_IRQ(MIPS_GIC_IRQ_BASE + irq);
+	else {
+		pr_debug("Spurious GIC Interrupt!\n");
+		spurious_interrupt();
+	}
+
+}
+
+static void
+vi_timer_irqdispatch(void)
+{
+	do_IRQ(cp0_compare_irq);
+}
+
+#if defined(CONFIG_MIPS_MT_SMP)
+unsigned int
+plat_ipi_call_int_xlate(unsigned int cpu)
+{
+	return GIC_CALL_INT(cpu);
+}
+
+unsigned int
+plat_ipi_resched_int_xlate(unsigned int cpu)
+{
+	return GIC_RESCHED_INT(cpu);
+}
+#endif
+
+asmlinkage void
+plat_irq_dispatch(void)
+{
+	unsigned int pending = read_c0_status() & read_c0_cause() & ST0_IM;
+
+	if (unlikely(!pending)) {
+		pr_err("Spurious CP0 Interrupt!\n");
+		spurious_interrupt();
+	} else {
+		if (pending & CAUSEF_IP7)
+			do_IRQ(cp0_compare_irq);
+
+		if (pending & (CAUSEF_IP4 | CAUSEF_IP3 | CAUSEF_IP2))
+			gic_irqdispatch();
+	}
+}
+
+unsigned int __cpuinit
+get_c0_compare_int(void)
+{
+	return CP0_LEGACY_COMPARE_IRQ;
+}
+
+static int
+gic_map(struct irq_domain *d, unsigned int irq, irq_hw_number_t hw)
+{
+	irq_set_chip_and_handler(irq, irq_gic,
+#if defined(CONFIG_MIPS_MT_SMP)
+		(hw >= gic_resched_int_base) ?
+			handle_percpu_irq :
+#endif
+			handle_level_irq);
+
+	return 0;
+}
+
+static const struct irq_domain_ops irq_domain_ops = {
+	.xlate = irq_domain_xlate_onecell,
+	.map = gic_map,
+};
+
+static int __init
+of_gic_init(struct device_node *node,
+				struct device_node *parent)
+{
+	struct irq_domain *domain;
+	struct resource gcmp = { 0 }, gic = { 0 };
+	unsigned int gic_rev;
+	int i;
+
+	if (of_address_to_resource(node, 0, &gic))
+		panic("Failed to get gic memory range");
+	if (request_mem_region(gic.start, resource_size(&gic),
+				gic.name) < 0)
+		panic("Failed to request gic memory");
+	if (of_address_to_resource(node, 2, &gcmp))
+		panic("Failed to get gic memory range");
+	if (request_mem_region(gcmp.start, resource_size(&gcmp),
+				gcmp.name) < 0)
+		panic("Failed to request gcmp memory");
+
+	_gcmp_base = (unsigned long) ioremap_nocache(gcmp.start, resource_size(&gcmp));
+	if (!_gcmp_base)
+		panic("Failed to remap gcmp memory\n");
+
+	if ((GCMPGCB(GCMPB) & GCMP_GCB_GCMPB_GCMPBASE_MSK) != gcmp.start)
+		panic("Failed to find gcmp core\n");
+
+	/* tell the gcmp where to find the gic */
+	GCMPGCB(GICBA) = gic.start | GCMP_GCB_GICBA_EN_MSK;
+	gic_present = 1;
+	if (cpu_has_vint) {
+		set_vi_handler(2, gic_irqdispatch);
+		set_vi_handler(3, gic_irqdispatch);
+		set_vi_handler(4, gic_irqdispatch);
+		set_vi_handler(7, vi_timer_irqdispatch);
+	}
+
+	gic_fill_map();
+
+	gic_init(gic.start, resource_size(&gic), gic_intr_map,
+		ARRAY_SIZE(gic_intr_map), MIPS_GIC_IRQ_BASE);
+
+	GICREAD(GIC_REG(SHARED, GIC_SH_REVISIONID), gic_rev);
+	pr_info("gic: revision %d.%d\n", (gic_rev >> 8) & 0xff, gic_rev & 0xff);
+
+	domain = irq_domain_add_legacy(node, GIC_NUM_INTRS, MIPS_GIC_IRQ_BASE,
+			0, &irq_domain_ops, NULL);
+	if (!domain)
+		panic("Failed to add irqdomain");
+
+#if defined(CONFIG_MIPS_MT_SMP)
+	for (i = 0; i < nr_cpu_ids; i++) {
+		setup_irq(MIPS_GIC_IRQ_BASE + GIC_RESCHED_INT(i), &irq_resched);
+		setup_irq(MIPS_GIC_IRQ_BASE + GIC_CALL_INT(i), &irq_call);
+	}
+#endif
+
+	change_c0_status(ST0_IM, STATUSF_IP7 | STATUSF_IP4 | STATUSF_IP3 |
+				STATUSF_IP2);
+	return 0;
+}
+
+static struct of_device_id __initdata of_irq_ids[] = {
+	{ .compatible = "mti,cpu-interrupt-controller", .data = mips_cpu_intc_init },
+	{ .compatible = "ralink,mt7621-gic", .data = of_gic_init },
+	{},
+};
+
+void __init
+arch_init_irq(void)
+{
+	of_irq_init(of_irq_ids);
+}
--- /dev/null
+++ b/arch/mips/ralink/malta-amon.c
@@ -0,0 +1,81 @@
+/*
+ * Copyright (C) 2007  MIPS Technologies, Inc.
+ *	All rights reserved.
+
+ *  This program is free software; you can distribute it and/or modify it
+ *  under the terms of the GNU General Public License (Version 2) as
+ *  published by the Free Software Foundation.
+ *
+ *  This program is distributed in the hope it will be useful, but WITHOUT
+ *  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ *  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ *  for more details.
+ *
+ *  You should have received a copy of the GNU General Public License along
+ *  with this program; if not, write to the Free Software Foundation, Inc.,
+ *  59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
+ *
+ * Arbitrary Monitor interface
+ */
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/smp.h>
+
+#include <asm/addrspace.h>
+#include <asm/mips-boards/launch.h>
+#include <asm/mipsmtregs.h>
+
+int amon_cpu_avail(int cpu)
+{
+	struct cpulaunch *launch = (struct cpulaunch *)CKSEG0ADDR(CPULAUNCH);
+
+	if (cpu < 0 || cpu >= NCPULAUNCH) {
+		pr_debug("avail: cpu%d is out of range\n", cpu);
+		return 0;
+	}
+
+	launch += cpu;
+	if (!(launch->flags & LAUNCH_FREADY)) {
+		pr_debug("avail: cpu%d is not ready\n", cpu);
+		return 0;
+	}
+	if (launch->flags & (LAUNCH_FGO|LAUNCH_FGONE)) {
+		pr_debug("avail: too late.. cpu%d is already gone\n", cpu);
+		return 0;
+	}
+
+	return 1;
+}
+
+void amon_cpu_start(int cpu,
+		    unsigned long pc, unsigned long sp,
+		    unsigned long gp, unsigned long a0)
+{
+	volatile struct cpulaunch *launch =
+		(struct cpulaunch  *)CKSEG0ADDR(CPULAUNCH);
+
+	if (!amon_cpu_avail(cpu))
+		return;
+	if (cpu == smp_processor_id()) {
+		pr_debug("launch: I am cpu%d!\n", cpu);
+		return;
+	}
+	launch += cpu;
+
+	pr_debug("launch: starting cpu%d\n", cpu);
+
+	launch->pc = pc;
+	launch->gp = gp;
+	launch->sp = sp;
+	launch->a0 = a0;
+
+	smp_wmb();		/* Target must see parameters before go */
+	launch->flags |= LAUNCH_FGO;
+	smp_wmb();		/* Target must see go before we poll  */
+
+	while ((launch->flags & LAUNCH_FGONE) == 0)
+		;
+	smp_rmb();	/* Target will be updating flags soon */
+	pr_debug("launch: cpu%d gone!\n", cpu);
+}
--- /dev/null
+++ b/arch/mips/ralink/mt7621.c
@@ -0,0 +1,183 @@
+/*
+ * 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.
+ *
+ * Parts of this file are based on Ralink's 2.6.21 BSP
+ *
+ * Copyright (C) 2008-2011 Gabor Juhos <juhosg@openwrt.org>
+ * Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org>
+ * Copyright (C) 2013 John Crispin <blogic@openwrt.org>
+ */
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <asm/gcmpregs.h>
+
+#include <asm/mipsregs.h>
+#include <asm/smp-ops.h>
+#include <asm/mach-ralink/ralink_regs.h>
+#include <asm/mach-ralink/mt7621.h>
+
+#include <pinmux.h>
+
+#include "common.h"
+
+#define SYSC_REG_SYSCFG		0x10
+#define SYSC_REG_CPLL_CLKCFG0	0x2c
+#define SYSC_REG_CUR_CLK_STS	0x44
+#define CPU_CLK_SEL		(BIT(30) | BIT(31))
+
+#define MT7621_GPIO_MODE_UART1		1
+#define MT7621_GPIO_MODE_I2C		2
+#define MT7621_GPIO_MODE_UART2		3
+#define MT7621_GPIO_MODE_UART3		5
+#define MT7621_GPIO_MODE_JTAG		7
+#define MT7621_GPIO_MODE_WDT_MASK	0x3
+#define MT7621_GPIO_MODE_WDT_SHIFT	8
+#define MT7621_GPIO_MODE_WDT_GPIO	1
+#define MT7621_GPIO_MODE_PCIE_RST	0
+#define MT7621_GPIO_MODE_PCIE_REF	2
+#define MT7621_GPIO_MODE_PCIE_MASK	0x3
+#define MT7621_GPIO_MODE_PCIE_SHIFT	10
+#define MT7621_GPIO_MODE_PCIE_GPIO	1
+#define MT7621_GPIO_MODE_MDIO		12
+#define MT7621_GPIO_MODE_RGMII1		14
+#define MT7621_GPIO_MODE_RGMII2		15
+#define MT7621_GPIO_MODE_SPI_MASK	0x3
+#define MT7621_GPIO_MODE_SPI_SHIFT	16
+#define MT7621_GPIO_MODE_SPI_GPIO	1
+#define MT7621_GPIO_MODE_SDHCI_MASK	0x3
+#define MT7621_GPIO_MODE_SDHCI_SHIFT	18
+#define MT7621_GPIO_MODE_SDHCI_GPIO	1
+
+static struct rt2880_pmx_func uart1_grp[] =  { FUNC("uart", 0, 1, 2) };
+static struct rt2880_pmx_func i2c_grp[] =  { FUNC("i2c", 0, 3, 2) };
+static struct rt2880_pmx_func uart3_grp[] = { FUNC("uart", 0, 5, 4) };
+static struct rt2880_pmx_func uart2_grp[] = { FUNC("uart", 0, 9, 4) };
+static struct rt2880_pmx_func jtag_grp[] = { FUNC("jtag", 0, 13, 5) };
+static struct rt2880_pmx_func wdt_grp[] = {
+	FUNC("wdt rst", 0, 18, 1),
+	FUNC("wdt refclk", 2, 18, 1),
+};
+static struct rt2880_pmx_func pcie_rst_grp[] = {
+	FUNC("pcie rst", MT7621_GPIO_MODE_PCIE_RST, 19, 1),
+	FUNC("pcie refclk", MT7621_GPIO_MODE_PCIE_REF, 19, 1)
+};
+static struct rt2880_pmx_func mdio_grp[] = { FUNC("mdio", 0, 20, 2) };
+static struct rt2880_pmx_func rgmii2_grp[] = { FUNC("rgmii", 0, 22, 12) };
+static struct rt2880_pmx_func spi_grp[] = {
+	FUNC("spi", 0, 34, 7),
+	FUNC("nand", 2, 34, 8),
+};
+static struct rt2880_pmx_func sdhci_grp[] = {
+	FUNC("sdhci", 0, 41, 8),
+	FUNC("nand", 2, 41, 8),
+};
+static struct rt2880_pmx_func rgmii1_grp[] = { FUNC("rgmii", 0, 49, 12) };
+
+static struct rt2880_pmx_group mt7621_pinmux_data[] = {
+	GRP("uart1", uart1_grp, 1, MT7621_GPIO_MODE_UART1),
+	GRP("i2c", i2c_grp, 1, MT7621_GPIO_MODE_I2C),
+	GRP("uart3", uart2_grp, 1, MT7621_GPIO_MODE_UART2),
+	GRP("uart2", uart3_grp, 1, MT7621_GPIO_MODE_UART3),
+	GRP("jtag", jtag_grp, 1, MT7621_GPIO_MODE_JTAG),
+	GRP_G("wdt", wdt_grp, MT7621_GPIO_MODE_WDT_MASK,
+		MT7621_GPIO_MODE_WDT_GPIO, MT7621_GPIO_MODE_WDT_SHIFT),
+	GRP_G("pcie", pcie_rst_grp, MT7621_GPIO_MODE_PCIE_MASK,
+		MT7621_GPIO_MODE_PCIE_GPIO, MT7621_GPIO_MODE_PCIE_SHIFT),
+	GRP("mdio", mdio_grp, 1, MT7621_GPIO_MODE_MDIO),
+	GRP("rgmii2", rgmii2_grp, 1, MT7621_GPIO_MODE_RGMII2),
+	GRP_G("spi", spi_grp, MT7621_GPIO_MODE_SPI_MASK,
+		MT7621_GPIO_MODE_SPI_GPIO, MT7621_GPIO_MODE_SPI_SHIFT),
+	GRP_G("sdhci", sdhci_grp, MT7621_GPIO_MODE_SDHCI_MASK,
+		MT7621_GPIO_MODE_SDHCI_GPIO, MT7621_GPIO_MODE_SDHCI_SHIFT),
+	GRP("rgmii1", rgmii1_grp, 1, MT7621_GPIO_MODE_RGMII1),
+	{ 0 }
+};
+
+void __init ralink_clk_init(void)
+{
+	int cpu_fdiv = 0;
+	int cpu_ffrac = 0;
+	int fbdiv = 0;
+	u32 clk_sts, syscfg;
+	u8 clk_sel = 0, xtal_mode;
+	u32 cpu_clk;
+
+	if ((rt_sysc_r32(SYSC_REG_CPLL_CLKCFG0) & CPU_CLK_SEL) != 0)
+		clk_sel = 1;
+
+	switch (clk_sel) {
+	case 0:
+		clk_sts = rt_sysc_r32(SYSC_REG_CUR_CLK_STS);
+		cpu_fdiv = ((clk_sts >> 8) & 0x1F);
+		cpu_ffrac = (clk_sts & 0x1F);
+		cpu_clk = (500 * cpu_ffrac / cpu_fdiv) * 1000 * 1000;
+		break;
+
+	case 1:
+		fbdiv = ((rt_sysc_r32(0x648) >> 4) & 0x7F) + 1;
+		syscfg = rt_sysc_r32(SYSC_REG_SYSCFG);
+		xtal_mode = (syscfg >> 6) & 0x7;
+		if(xtal_mode >= 6) { //25Mhz Xtal
+			cpu_clk = 25 * fbdiv * 1000 * 1000;
+		} else if(xtal_mode >=3) { //40Mhz Xtal
+			cpu_clk = 40 * fbdiv * 1000 * 1000;
+		} else { // 20Mhz Xtal
+			cpu_clk = 20 * fbdiv * 1000 * 1000;
+		}
+		break;
+	}
+	cpu_clk = 880000000;
+	ralink_clk_add("cpu", cpu_clk);
+	ralink_clk_add("1e000b00.spi", 50000000);
+	ralink_clk_add("1e000c00.uartlite", 50000000);
+	ralink_clk_add("1e000d00.uart", 50000000);
+}
+
+void __init ralink_of_remap(void)
+{
+	rt_sysc_membase = plat_of_remap_node("mtk,mt7621-sysc");
+	rt_memc_membase = plat_of_remap_node("mtk,mt7621-memc");
+
+	if (!rt_sysc_membase || !rt_memc_membase)
+		panic("Failed to remap core resources");
+}
+
+void prom_soc_init(struct ralink_soc_info *soc_info)
+{
+	void __iomem *sysc = (void __iomem *) KSEG1ADDR(MT7621_SYSC_BASE);
+	unsigned char *name = NULL;
+	u32 n0;
+	u32 n1;
+	u32 rev;
+
+	n0 = __raw_readl(sysc + SYSC_REG_CHIP_NAME0);
+	n1 = __raw_readl(sysc + SYSC_REG_CHIP_NAME1);
+
+	if (n0 == MT7621_CHIP_NAME0 && n1 == MT7621_CHIP_NAME1) {
+		name = "MT7621";
+		soc_info->compatible = "mtk,mt7621-soc";
+	} else {
+		panic("mt7621: unknown SoC, n0:%08x n1:%08x\n", n0, n1);
+	}
+
+	rev = __raw_readl(sysc + SYSC_REG_CHIP_REV);
+
+	snprintf(soc_info->sys_type, RAMIPS_SYS_TYPE_LEN,
+		"Mediatek %s ver:%u eco:%u",
+		name,
+		(rev >> CHIP_REV_VER_SHIFT) & CHIP_REV_VER_MASK,
+		(rev & CHIP_REV_ECO_MASK));
+
+	soc_info->mem_size_min = MT7621_DDR2_SIZE_MIN;
+	soc_info->mem_size_max = MT7621_DDR2_SIZE_MAX;
+	soc_info->mem_base = MT7621_DRAM_BASE;
+
+	rt2880_pinmux_data = mt7621_pinmux_data;
+
+	if (register_cmp_smp_ops())
+		panic("failed to register_vsmp_smp_ops()");
+}
