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Diffstat (limited to 'target/linux/lantiq/patches-2.6.39/0001-MIPS-Lantiq-Add-initial-support-for-Lantiq-SoCs.patch')
-rw-r--r--target/linux/lantiq/patches-2.6.39/0001-MIPS-Lantiq-Add-initial-support-for-Lantiq-SoCs.patch894
1 files changed, 894 insertions, 0 deletions
diff --git a/target/linux/lantiq/patches-2.6.39/0001-MIPS-Lantiq-Add-initial-support-for-Lantiq-SoCs.patch b/target/linux/lantiq/patches-2.6.39/0001-MIPS-Lantiq-Add-initial-support-for-Lantiq-SoCs.patch
new file mode 100644
index 000000000..c7f96cdd3
--- /dev/null
+++ b/target/linux/lantiq/patches-2.6.39/0001-MIPS-Lantiq-Add-initial-support-for-Lantiq-SoCs.patch
@@ -0,0 +1,894 @@
+From 9e0235e97ea2617beaacaa16ab5f0b9e75f4680e Mon Sep 17 00:00:00 2001
+From: John Crispin <blogic@openwrt.org>
+Date: Wed, 30 Mar 2011 09:27:47 +0200
+Subject: [PATCH 01/13] MIPS: Lantiq: Add initial support for Lantiq SoCs
+
+Add initial support for Mips based SoCs made by Lantiq. This series will add
+support for the XWAY family.
+
+The series allows booting a minimal system using a initramfs or NOR. Missing
+drivers and support for Amazon and GPON family will be provided in a later
+series.
+
+[Ralf: Remove some cargo cult programming and fixed formatting.]
+
+Signed-off-by: John Crispin <blogic@openwrt.org>
+Signed-off-by: Ralph Hempel <ralph.hempel@lantiq.com>
+Signed-off-by: David Daney <ddaney@caviumnetworks.com>
+Cc: linux-mips@linux-mips.org
+Patchwork: https://patchwork.linux-mips.org/patch/2252/
+Patchwork: https://patchwork.linux-mips.org/patch/2371/
+Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
+---
+ arch/mips/Kbuild.platforms | 1 +
+ arch/mips/Kconfig | 17 ++
+ arch/mips/include/asm/mach-lantiq/lantiq.h | 63 ++++++
+ arch/mips/include/asm/mach-lantiq/war.h | 24 ++
+ arch/mips/lantiq/Makefile | 9 +
+ arch/mips/lantiq/Platform | 7 +
+ arch/mips/lantiq/clk.c | 140 ++++++++++++
+ arch/mips/lantiq/clk.h | 18 ++
+ arch/mips/lantiq/early_printk.c | 33 +++
+ arch/mips/lantiq/irq.c | 326 ++++++++++++++++++++++++++++
+ arch/mips/lantiq/prom.c | 71 ++++++
+ arch/mips/lantiq/prom.h | 24 ++
+ arch/mips/lantiq/setup.c | 41 ++++
+ 13 files changed, 774 insertions(+), 0 deletions(-)
+ create mode 100644 arch/mips/include/asm/mach-lantiq/lantiq.h
+ create mode 100644 arch/mips/include/asm/mach-lantiq/war.h
+ create mode 100644 arch/mips/lantiq/Makefile
+ create mode 100644 arch/mips/lantiq/Platform
+ create mode 100644 arch/mips/lantiq/clk.c
+ create mode 100644 arch/mips/lantiq/clk.h
+ create mode 100644 arch/mips/lantiq/early_printk.c
+ create mode 100644 arch/mips/lantiq/irq.c
+ create mode 100644 arch/mips/lantiq/prom.c
+ create mode 100644 arch/mips/lantiq/prom.h
+ create mode 100644 arch/mips/lantiq/setup.c
+
+--- a/arch/mips/Kconfig
++++ b/arch/mips/Kconfig
+@@ -212,6 +212,23 @@
+ select HAVE_PWM
+ select HAVE_CLK
+
++config LANTIQ
++ bool "Lantiq based platforms"
++ select DMA_NONCOHERENT
++ select IRQ_CPU
++ select CEVT_R4K
++ select CSRC_R4K
++ select SYS_HAS_CPU_MIPS32_R1
++ select SYS_HAS_CPU_MIPS32_R2
++ select SYS_SUPPORTS_BIG_ENDIAN
++ select SYS_SUPPORTS_32BIT_KERNEL
++ select SYS_SUPPORTS_MULTITHREADING
++ select SYS_HAS_EARLY_PRINTK
++ select ARCH_REQUIRE_GPIOLIB
++ select SWAP_IO_SPACE
++ select BOOT_RAW
++ select HAVE_CLK
++
+ config LASAT
+ bool "LASAT Networks platforms"
+ select CEVT_R4K
+--- /dev/null
++++ b/arch/mips/include/asm/mach-lantiq/lantiq.h
+@@ -0,0 +1,63 @@
++/*
++ * 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.
++ *
++ * Copyright (C) 2010 John Crispin <blogic@openwrt.org>
++ */
++#ifndef _LANTIQ_H__
++#define _LANTIQ_H__
++
++#include <linux/irq.h>
++
++/* generic reg access functions */
++#define ltq_r32(reg) __raw_readl(reg)
++#define ltq_w32(val, reg) __raw_writel(val, reg)
++#define ltq_w32_mask(clear, set, reg) \
++ ltq_w32((ltq_r32(reg) & ~(clear)) | (set), reg)
++#define ltq_r8(reg) __raw_readb(reg)
++#define ltq_w8(val, reg) __raw_writeb(val, reg)
++
++/* register access macros for EBU and CGU */
++#define ltq_ebu_w32(x, y) ltq_w32((x), ltq_ebu_membase + (y))
++#define ltq_ebu_r32(x) ltq_r32(ltq_ebu_membase + (x))
++#define ltq_cgu_w32(x, y) ltq_w32((x), ltq_cgu_membase + (y))
++#define ltq_cgu_r32(x) ltq_r32(ltq_cgu_membase + (x))
++
++extern __iomem void *ltq_ebu_membase;
++extern __iomem void *ltq_cgu_membase;
++
++extern unsigned int ltq_get_cpu_ver(void);
++extern unsigned int ltq_get_soc_type(void);
++
++/* clock speeds */
++#define CLOCK_60M 60000000
++#define CLOCK_83M 83333333
++#define CLOCK_111M 111111111
++#define CLOCK_133M 133333333
++#define CLOCK_167M 166666667
++#define CLOCK_200M 200000000
++#define CLOCK_266M 266666666
++#define CLOCK_333M 333333333
++#define CLOCK_400M 400000000
++
++/* spinlock all ebu i/o */
++extern spinlock_t ebu_lock;
++
++/* some irq helpers */
++extern void ltq_disable_irq(struct irq_data *d);
++extern void ltq_mask_and_ack_irq(struct irq_data *d);
++extern void ltq_enable_irq(struct irq_data *d);
++
++/* find out what caused the last cpu reset */
++extern int ltq_reset_cause(void);
++#define LTQ_RST_CAUSE_WDTRST 0x20
++
++#define IOPORT_RESOURCE_START 0x10000000
++#define IOPORT_RESOURCE_END 0xffffffff
++#define IOMEM_RESOURCE_START 0x10000000
++#define IOMEM_RESOURCE_END 0xffffffff
++#define LTQ_FLASH_START 0x10000000
++#define LTQ_FLASH_MAX 0x04000000
++
++#endif
+--- /dev/null
++++ b/arch/mips/include/asm/mach-lantiq/war.h
+@@ -0,0 +1,24 @@
++/*
++ * This file is subject to the terms and conditions of the GNU General Public
++ * License. See the file "COPYING" in the main directory of this archive
++ * for more details.
++ *
++ */
++#ifndef __ASM_MIPS_MACH_LANTIQ_WAR_H
++#define __ASM_MIPS_MACH_LANTIQ_WAR_H
++
++#define R4600_V1_INDEX_ICACHEOP_WAR 0
++#define R4600_V1_HIT_CACHEOP_WAR 0
++#define R4600_V2_HIT_CACHEOP_WAR 0
++#define R5432_CP0_INTERRUPT_WAR 0
++#define BCM1250_M3_WAR 0
++#define SIBYTE_1956_WAR 0
++#define MIPS4K_ICACHE_REFILL_WAR 0
++#define MIPS_CACHE_SYNC_WAR 0
++#define TX49XX_ICACHE_INDEX_INV_WAR 0
++#define RM9000_CDEX_SMP_WAR 0
++#define ICACHE_REFILLS_WORKAROUND_WAR 0
++#define R10000_LLSC_WAR 0
++#define MIPS34K_MISSED_ITLB_WAR 0
++
++#endif
+--- /dev/null
++++ b/arch/mips/lantiq/Makefile
+@@ -0,0 +1,9 @@
++# Copyright (C) 2010 John Crispin <blogic@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 clk.o prom.o
++
++obj-$(CONFIG_EARLY_PRINTK) += early_printk.o
+--- /dev/null
++++ b/arch/mips/lantiq/Platform
+@@ -0,0 +1,7 @@
++#
++# Lantiq
++#
++
++platform-$(CONFIG_LANTIQ) += lantiq/
++cflags-$(CONFIG_LANTIQ) += -I$(srctree)/arch/mips/include/asm/mach-lantiq
++load-$(CONFIG_LANTIQ) = 0xffffffff80002000
+--- /dev/null
++++ b/arch/mips/lantiq/clk.c
+@@ -0,0 +1,144 @@
++/*
++ * 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.
++ *
++ * Copyright (C) 2010 Thomas Langer <thomas.langer@lantiq.com>
++ * Copyright (C) 2010 John Crispin <blogic@openwrt.org>
++ */
++#include <linux/io.h>
++#include <linux/module.h>
++#include <linux/init.h>
++#include <linux/kernel.h>
++#include <linux/types.h>
++#include <linux/clk.h>
++#include <linux/err.h>
++#include <linux/list.h>
++
++#include <asm/time.h>
++#include <asm/irq.h>
++#include <asm/div64.h>
++
++#include <lantiq_soc.h>
++
++#include "clk.h"
++
++struct clk {
++ const char *name;
++ unsigned long rate;
++ unsigned long (*get_rate) (void);
++};
++
++static struct clk *cpu_clk;
++static int cpu_clk_cnt;
++
++/* lantiq socs have 3 static clocks */
++static struct clk cpu_clk_generic[] = {
++ {
++ .name = "cpu",
++ .get_rate = ltq_get_cpu_hz,
++ }, {
++ .name = "fpi",
++ .get_rate = ltq_get_fpi_hz,
++ }, {
++ .name = "io",
++ .get_rate = ltq_get_io_region_clock,
++ },
++};
++
++#ifdef CONFIG_SOC_TYPE_XWAY
++static struct resource ltq_cgu_resource = {
++ .name = "cgu",
++ .start = LTQ_CGU_BASE_ADDR,
++ .end = LTQ_CGU_BASE_ADDR + LTQ_CGU_SIZE - 1,
++ .flags = IORESOURCE_MEM,
++};
++
++/* remapped clock register range */
++void __iomem *ltq_cgu_membase;
++#endif
++
++void clk_init(void)
++{
++ cpu_clk = cpu_clk_generic;
++ cpu_clk_cnt = ARRAY_SIZE(cpu_clk_generic);
++}
++
++static inline int clk_good(struct clk *clk)
++{
++ return clk && !IS_ERR(clk);
++}
++
++unsigned long clk_get_rate(struct clk *clk)
++{
++ if (unlikely(!clk_good(clk)))
++ return 0;
++
++ if (clk->rate != 0)
++ return clk->rate;
++
++ if (clk->get_rate != NULL)
++ return clk->get_rate();
++
++ return 0;
++}
++EXPORT_SYMBOL(clk_get_rate);
++
++struct clk *clk_get(struct device *dev, const char *id)
++{
++ int i;
++
++ for (i = 0; i < cpu_clk_cnt; i++)
++ if (!strcmp(id, cpu_clk[i].name))
++ return &cpu_clk[i];
++ BUG();
++ return ERR_PTR(-ENOENT);
++}
++EXPORT_SYMBOL(clk_get);
++
++void clk_put(struct clk *clk)
++{
++ /* not used */
++}
++EXPORT_SYMBOL(clk_put);
++
++static inline u32 ltq_get_counter_resolution(void)
++{
++ u32 res;
++
++ __asm__ __volatile__(
++ ".set push\n"
++ ".set mips32r2\n"
++ "rdhwr %0, $3\n"
++ ".set pop\n"
++ : "=&r" (res)
++ : /* no input */
++ : "memory");
++
++ return res;
++}
++
++void __init plat_time_init(void)
++{
++ struct clk *clk;
++
++#ifdef CONFIG_SOC_TYPE_XWAY
++ if (insert_resource(&iomem_resource, &ltq_cgu_resource) < 0)
++ panic("Failed to insert cgu memory\n");
++
++ if (request_mem_region(ltq_cgu_resource.start,
++ resource_size(&ltq_cgu_resource), "cgu") < 0)
++ panic("Failed to request cgu memory\n");
++
++ ltq_cgu_membase = ioremap_nocache(ltq_cgu_resource.start,
++ resource_size(&ltq_cgu_resource));
++ if (!ltq_cgu_membase) {
++ pr_err("Failed to remap cgu memory\n");
++ unreachable();
++ }
++#endif
++ clk = clk_get(0, "cpu");
++ mips_hpt_frequency = clk_get_rate(clk) / ltq_get_counter_resolution();
++ write_c0_compare(read_c0_count());
++ clk_put(clk);
++}
+--- /dev/null
++++ b/arch/mips/lantiq/clk.h
+@@ -0,0 +1,18 @@
++/*
++ * 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.
++ *
++ * Copyright (C) 2010 John Crispin <blogic@openwrt.org>
++ */
++
++#ifndef _LTQ_CLK_H__
++#define _LTQ_CLK_H__
++
++extern void clk_init(void);
++
++extern unsigned long ltq_get_cpu_hz(void);
++extern unsigned long ltq_get_fpi_hz(void);
++extern unsigned long ltq_get_io_region_clock(void);
++
++#endif
+--- /dev/null
++++ b/arch/mips/lantiq/early_printk.c
+@@ -0,0 +1,37 @@
++/*
++ * 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.
++ *
++ * Copyright (C) 2010 John Crispin <blogic@openwrt.org>
++ */
++
++#include <linux/init.h>
++#include <linux/cpu.h>
++
++#include <lantiq.h>
++#include <lantiq_soc.h>
++
++/* no ioremap possible at this early stage, lets use KSEG1 instead */
++#ifdef CONFIG_SOC_FALCON
++#define LTQ_ASC_BASE KSEG1ADDR(LTQ_ASC0_BASE_ADDR)
++#else
++#define LTQ_ASC_BASE KSEG1ADDR(LTQ_ASC1_BASE_ADDR)
++#endif
++#define ASC_BUF 1024
++#define LTQ_ASC_FSTAT ((u32 *)(LTQ_ASC_BASE + 0x0048))
++#define LTQ_ASC_TBUF ((u32 *)(LTQ_ASC_BASE + 0x0020))
++#define TXMASK 0x3F00
++#define TXOFFSET 8
++
++void prom_putchar(char c)
++{
++ unsigned long flags;
++
++ local_irq_save(flags);
++ do { } while ((ltq_r32(LTQ_ASC_FSTAT) & TXMASK) >> TXOFFSET);
++ if (c == '\n')
++ ltq_w32('\r', LTQ_ASC_TBUF);
++ ltq_w32(c, LTQ_ASC_TBUF);
++ local_irq_restore(flags);
++}
+--- /dev/null
++++ b/arch/mips/lantiq/irq.c
+@@ -0,0 +1,339 @@
++/*
++ * 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.
++ *
++ * Copyright (C) 2010 John Crispin <blogic@openwrt.org>
++ * Copyright (C) 2010 Thomas Langer <thomas.langer@lantiq.com>
++ */
++
++#include <linux/interrupt.h>
++#include <linux/ioport.h>
++#include <linux/module.h>
++
++#include <asm/bootinfo.h>
++#include <asm/irq_cpu.h>
++
++#include <lantiq_soc.h>
++#include <irq.h>
++
++/* register definitions */
++#define LTQ_ICU_IM0_ISR 0x0000
++#define LTQ_ICU_IM0_IER 0x0008
++#define LTQ_ICU_IM0_IOSR 0x0010
++#define LTQ_ICU_IM0_IRSR 0x0018
++#define LTQ_ICU_IM0_IMR 0x0020
++#define LTQ_ICU_IM1_ISR 0x0028
++#define LTQ_ICU_OFFSET (LTQ_ICU_IM1_ISR - LTQ_ICU_IM0_ISR)
++
++#ifdef CONFIG_SOC_TYPE_XWAY
++
++#define LTQ_EIU_EXIN_C 0x0000
++#define LTQ_EIU_EXIN_INIC 0x0004
++#define LTQ_EIU_EXIN_INEN 0x000C
++
++/* irq numbers used by the external interrupt unit (EIU) */
++#define LTQ_EIU_IR0 (INT_NUM_IM4_IRL0 + 30)
++#define LTQ_EIU_IR1 (INT_NUM_IM3_IRL0 + 31)
++#define LTQ_EIU_IR2 (INT_NUM_IM1_IRL0 + 26)
++#define LTQ_EIU_IR3 INT_NUM_IM1_IRL0
++#define LTQ_EIU_IR4 (INT_NUM_IM1_IRL0 + 1)
++#define LTQ_EIU_IR5 (INT_NUM_IM1_IRL0 + 2)
++#define LTQ_EIU_IR6 (INT_NUM_IM2_IRL0 + 30)
++
++#define MAX_EIU 6
++
++/* irqs generated by device attached to the EBU need to be acked in
++ * a special manner
++ */
++#define LTQ_ICU_EBU_IRQ 22
++
++#define ltq_eiu_w32(x, y) ltq_w32((x), ltq_eiu_membase + (y))
++#define ltq_eiu_r32(x) ltq_r32(ltq_eiu_membase + (x))
++
++static unsigned short ltq_eiu_irq[MAX_EIU] = {
++ LTQ_EIU_IR0,
++ LTQ_EIU_IR1,
++ LTQ_EIU_IR2,
++ LTQ_EIU_IR3,
++ LTQ_EIU_IR4,
++ LTQ_EIU_IR5,
++};
++
++static void __iomem *ltq_eiu_membase;
++
++static struct resource ltq_eiu_resource = {
++ .name = "eiu",
++ .start = LTQ_EIU_BASE_ADDR,
++ .end = LTQ_EIU_BASE_ADDR + LTQ_ICU_SIZE - 1,
++ .flags = IORESOURCE_MEM,
++};
++
++#endif
++
++static struct resource ltq_icu_resource = {
++ .name = "icu",
++ .start = LTQ_ICU_BASE_ADDR,
++ .end = LTQ_ICU_BASE_ADDR + LTQ_ICU_SIZE - 1,
++ .flags = IORESOURCE_MEM,
++};
++
++#define ltq_icu_w32(x, y) ltq_w32((x), ltq_icu_membase + (y))
++#define ltq_icu_r32(x) ltq_r32(ltq_icu_membase + (x))
++
++static void __iomem *ltq_icu_membase;
++
++
++void ltq_disable_irq(struct irq_data *d)
++{
++ u32 ier = LTQ_ICU_IM0_IER;
++ int irq_nr = d->irq - INT_NUM_IRQ0;
++
++ ier += LTQ_ICU_OFFSET * (irq_nr / INT_NUM_IM_OFFSET);
++ irq_nr %= INT_NUM_IM_OFFSET;
++ ltq_icu_w32(ltq_icu_r32(ier) & ~(1 << irq_nr), ier);
++}
++
++void ltq_mask_and_ack_irq(struct irq_data *d)
++{
++ u32 ier = LTQ_ICU_IM0_IER;
++ u32 isr = LTQ_ICU_IM0_ISR;
++ int irq_nr = d->irq - INT_NUM_IRQ0;
++
++ ier += LTQ_ICU_OFFSET * (irq_nr / INT_NUM_IM_OFFSET);
++ isr += LTQ_ICU_OFFSET * (irq_nr / INT_NUM_IM_OFFSET);
++ irq_nr %= INT_NUM_IM_OFFSET;
++ ltq_icu_w32(ltq_icu_r32(ier) & ~(1 << irq_nr), ier);
++ ltq_icu_w32((1 << irq_nr), isr);
++}
++EXPORT_SYMBOL(ltq_mask_and_ack_irq);
++
++static void ltq_ack_irq(struct irq_data *d)
++{
++ u32 isr = LTQ_ICU_IM0_ISR;
++ int irq_nr = d->irq - INT_NUM_IRQ0;
++
++ isr += LTQ_ICU_OFFSET * (irq_nr / INT_NUM_IM_OFFSET);
++ irq_nr %= INT_NUM_IM_OFFSET;
++ ltq_icu_w32((1 << irq_nr), isr);
++}
++
++void ltq_enable_irq(struct irq_data *d)
++{
++ u32 ier = LTQ_ICU_IM0_IER;
++ int irq_nr = d->irq - INT_NUM_IRQ0;
++
++ ier += LTQ_ICU_OFFSET * (irq_nr / INT_NUM_IM_OFFSET);
++ irq_nr %= INT_NUM_IM_OFFSET;
++ ltq_icu_w32(ltq_icu_r32(ier) | (1 << irq_nr), ier);
++}
++
++#ifdef CONFIG_SOC_TYPE_XWAY
++static unsigned int ltq_startup_eiu_irq(struct irq_data *d)
++{
++ int i;
++ int irq_nr = d->irq - INT_NUM_IRQ0;
++
++ ltq_enable_irq(d);
++ for (i = 0; i < MAX_EIU; i++) {
++ if (irq_nr == ltq_eiu_irq[i]) {
++ /* low level - we should really handle set_type */
++ ltq_eiu_w32(ltq_eiu_r32(LTQ_EIU_EXIN_C) |
++ (0x6 << (i * 4)), LTQ_EIU_EXIN_C);
++ /* clear all pending */
++ ltq_eiu_w32(ltq_eiu_r32(LTQ_EIU_EXIN_INIC) & ~(1 << i),
++ LTQ_EIU_EXIN_INIC);
++ /* enable */
++ ltq_eiu_w32(ltq_eiu_r32(LTQ_EIU_EXIN_INEN) | (1 << i),
++ LTQ_EIU_EXIN_INEN);
++ break;
++ }
++ }
++
++ return 0;
++}
++
++static void ltq_shutdown_eiu_irq(struct irq_data *d)
++{
++ int i;
++ int irq_nr = d->irq - INT_NUM_IRQ0;
++
++ ltq_disable_irq(d);
++ for (i = 0; i < MAX_EIU; i++) {
++ if (irq_nr == ltq_eiu_irq[i]) {
++ /* disable */
++ ltq_eiu_w32(ltq_eiu_r32(LTQ_EIU_EXIN_INEN) & ~(1 << i),
++ LTQ_EIU_EXIN_INEN);
++ break;
++ }
++ }
++}
++#endif
++
++static struct irq_chip ltq_irq_type = {
++ "icu",
++ .irq_enable = ltq_enable_irq,
++ .irq_disable = ltq_disable_irq,
++ .irq_unmask = ltq_enable_irq,
++ .irq_ack = ltq_ack_irq,
++ .irq_mask = ltq_disable_irq,
++ .irq_mask_ack = ltq_mask_and_ack_irq,
++};
++
++#ifdef CONFIG_SOC_TYPE_XWAY
++static struct irq_chip ltq_eiu_type = {
++ "eiu",
++ .irq_startup = ltq_startup_eiu_irq,
++ .irq_shutdown = ltq_shutdown_eiu_irq,
++ .irq_enable = ltq_enable_irq,
++ .irq_disable = ltq_disable_irq,
++ .irq_unmask = ltq_enable_irq,
++ .irq_ack = ltq_ack_irq,
++ .irq_mask = ltq_disable_irq,
++ .irq_mask_ack = ltq_mask_and_ack_irq,
++};
++#endif
++
++static void ltq_hw_irqdispatch(int module)
++{
++ u32 irq;
++
++ irq = ltq_icu_r32(LTQ_ICU_IM0_IOSR + (module * LTQ_ICU_OFFSET));
++ if (irq == 0)
++ return;
++
++ /* silicon bug causes only the msb set to 1 to be valid. all
++ * other bits might be bogus
++ */
++ irq = __fls(irq);
++ do_IRQ((int)irq + INT_NUM_IM0_IRL0 + (INT_NUM_IM_OFFSET * module));
++
++#ifdef CONFIG_SOC_TYPE_XWAY
++ /* if this is a EBU irq, we need to ack it or get a deadlock */
++ if ((irq == LTQ_ICU_EBU_IRQ) && (module == 0))
++ ltq_ebu_w32(ltq_ebu_r32(LTQ_EBU_PCC_ISTAT) | 0x10,
++ LTQ_EBU_PCC_ISTAT);
++#endif
++}
++
++#define DEFINE_HWx_IRQDISPATCH(x) \
++ static void ltq_hw ## x ## _irqdispatch(void) \
++ { \
++ ltq_hw_irqdispatch(x); \
++ }
++DEFINE_HWx_IRQDISPATCH(0)
++DEFINE_HWx_IRQDISPATCH(1)
++DEFINE_HWx_IRQDISPATCH(2)
++DEFINE_HWx_IRQDISPATCH(3)
++DEFINE_HWx_IRQDISPATCH(4)
++
++static void ltq_hw5_irqdispatch(void)
++{
++ do_IRQ(MIPS_CPU_TIMER_IRQ);
++}
++
++asmlinkage void plat_irq_dispatch(void)
++{
++ unsigned int pending = read_c0_status() & read_c0_cause() & ST0_IM;
++ unsigned int i;
++
++ if (pending & CAUSEF_IP7) {
++ do_IRQ(MIPS_CPU_TIMER_IRQ);
++ goto out;
++ } else {
++ for (i = 0; i < 5; i++) {
++ if (pending & (CAUSEF_IP2 << i)) {
++ ltq_hw_irqdispatch(i);
++ goto out;
++ }
++ }
++ }
++ pr_alert("Spurious IRQ: CAUSE=0x%08x\n", read_c0_status());
++
++out:
++ return;
++}
++
++static struct irqaction cascade = {
++ .handler = no_action,
++ .flags = IRQF_DISABLED,
++ .name = "cascade",
++};
++
++void __init arch_init_irq(void)
++{
++ int i;
++
++ if (insert_resource(&iomem_resource, &ltq_icu_resource) < 0)
++ panic("Failed to insert icu memory\n");
++
++ if (request_mem_region(ltq_icu_resource.start,
++ resource_size(&ltq_icu_resource), "icu") < 0)
++ panic("Failed to request icu memory\n");
++
++ ltq_icu_membase = ioremap_nocache(ltq_icu_resource.start,
++ resource_size(&ltq_icu_resource));
++ if (!ltq_icu_membase)
++ panic("Failed to remap icu memory\n");
++
++#ifdef CONFIG_SOC_TYPE_XWAY
++ if (insert_resource(&iomem_resource, &ltq_eiu_resource) < 0)
++ panic("Failed to insert eiu memory\n");
++
++ if (request_mem_region(ltq_eiu_resource.start,
++ resource_size(&ltq_eiu_resource), "eiu") < 0)
++ panic("Failed to request eiu memory\n");
++
++ ltq_eiu_membase = ioremap_nocache(ltq_eiu_resource.start,
++ resource_size(&ltq_eiu_resource));
++ if (!ltq_eiu_membase)
++ panic("Failed to remap eiu memory\n");
++#endif
++ /* make sure all irqs are turned off by default */
++ for (i = 0; i < 5; i++)
++ ltq_icu_w32(0, LTQ_ICU_IM0_IER + (i * LTQ_ICU_OFFSET));
++
++ /* clear all possibly pending interrupts */
++ ltq_icu_w32(~0, LTQ_ICU_IM0_ISR + (i * LTQ_ICU_OFFSET));
++
++ mips_cpu_irq_init();
++
++ for (i = 2; i <= 6; i++)
++ setup_irq(i, &cascade);
++
++ if (cpu_has_vint) {
++ pr_info("Setting up vectored interrupts\n");
++ set_vi_handler(2, ltq_hw0_irqdispatch);
++ set_vi_handler(3, ltq_hw1_irqdispatch);
++ set_vi_handler(4, ltq_hw2_irqdispatch);
++ set_vi_handler(5, ltq_hw3_irqdispatch);
++ set_vi_handler(6, ltq_hw4_irqdispatch);
++ set_vi_handler(7, ltq_hw5_irqdispatch);
++ }
++
++ for (i = INT_NUM_IRQ0;
++ i <= (INT_NUM_IRQ0 + (5 * INT_NUM_IM_OFFSET)); i++)
++#ifdef CONFIG_SOC_TYPE_XWAY
++ if ((i == LTQ_EIU_IR0) || (i == LTQ_EIU_IR1) || (i == LTQ_EIU_IR2))
++ irq_set_chip_and_handler(i, &ltq_eiu_type, handle_level_irq);
++ /* EIU3-5 only exist on ar9 and vr9 */
++ else if (((i == LTQ_EIU_IR3) || (i == LTQ_EIU_IR4) ||
++ (i == LTQ_EIU_IR5)) && (ltq_is_ar9() || ltq_is_vr9()))
++ irq_set_chip_and_handler(i, &ltq_eiu_type, handle_level_irq);
++ else
++#endif
++ irq_set_chip_and_handler(i, &ltq_irq_type, handle_level_irq);
++
++#if !defined(CONFIG_MIPS_MT_SMP) && !defined(CONFIG_MIPS_MT_SMTC)
++ set_c0_status(IE_IRQ0 | IE_IRQ1 | IE_IRQ2 |
++ IE_IRQ3 | IE_IRQ4 | IE_IRQ5);
++#else
++ set_c0_status(IE_SW0 | IE_SW1 | IE_IRQ0 | IE_IRQ1 |
++ IE_IRQ2 | IE_IRQ3 | IE_IRQ4 | IE_IRQ5);
++#endif
++}
++
++unsigned int __cpuinit get_c0_compare_int(void)
++{
++ return CP0_LEGACY_COMPARE_IRQ;
++}
+--- /dev/null
++++ b/arch/mips/lantiq/prom.c
+@@ -0,0 +1,71 @@
++/*
++ * 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.
++ *
++ * Copyright (C) 2010 John Crispin <blogic@openwrt.org>
++ */
++
++#include <linux/module.h>
++#include <linux/clk.h>
++#include <asm/bootinfo.h>
++#include <asm/time.h>
++
++#include <lantiq.h>
++
++#include "prom.h"
++#include "clk.h"
++
++static struct ltq_soc_info soc_info;
++
++unsigned int ltq_get_cpu_ver(void)
++{
++ return soc_info.rev;
++}
++EXPORT_SYMBOL(ltq_get_cpu_ver);
++
++unsigned int ltq_get_soc_type(void)
++{
++ return soc_info.type;
++}
++EXPORT_SYMBOL(ltq_get_soc_type);
++
++const char *get_system_type(void)
++{
++ return soc_info.sys_type;
++}
++
++void prom_free_prom_memory(void)
++{
++}
++
++static void __init prom_init_cmdline(void)
++{
++ int argc = fw_arg0;
++ char **argv = (char **) KSEG1ADDR(fw_arg1);
++ int i;
++
++ for (i = 0; i < argc; i++) {
++ char *p = (char *) KSEG1ADDR(argv[i]);
++
++ if (p && *p) {
++ strlcat(arcs_cmdline, p, sizeof(arcs_cmdline));
++ strlcat(arcs_cmdline, " ", sizeof(arcs_cmdline));
++ }
++ }
++}
++
++void __init prom_init(void)
++{
++ struct clk *clk;
++
++ ltq_soc_detect(&soc_info);
++ clk_init();
++ clk = clk_get(0, "cpu");
++ snprintf(soc_info.sys_type, LTQ_SYS_TYPE_LEN - 1, "%s rev1.%d",
++ soc_info.name, soc_info.rev);
++ clk_put(clk);
++ soc_info.sys_type[LTQ_SYS_TYPE_LEN - 1] = '\0';
++ pr_info("SoC: %s\n", soc_info.sys_type);
++ prom_init_cmdline();
++}
+--- /dev/null
++++ b/arch/mips/lantiq/prom.h
+@@ -0,0 +1,24 @@
++/*
++ * 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.
++ *
++ * Copyright (C) 2010 John Crispin <blogic@openwrt.org>
++ */
++
++#ifndef _LTQ_PROM_H__
++#define _LTQ_PROM_H__
++
++#define LTQ_SYS_TYPE_LEN 0x100
++
++struct ltq_soc_info {
++ unsigned char *name;
++ unsigned int rev;
++ unsigned int partnum;
++ unsigned int type;
++ unsigned char sys_type[LTQ_SYS_TYPE_LEN];
++};
++
++extern void ltq_soc_detect(struct ltq_soc_info *i);
++
++#endif
+--- /dev/null
++++ b/arch/mips/lantiq/setup.c
+@@ -0,0 +1,41 @@
++/*
++ * 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.
++ *
++ * Copyright (C) 2010 John Crispin <blogic@openwrt.org>
++ */
++
++#include <linux/kernel.h>
++#include <linux/module.h>
++#include <linux/io.h>
++#include <linux/ioport.h>
++#include <asm/bootinfo.h>
++
++#include <lantiq_soc.h>
++
++void __init plat_mem_setup(void)
++{
++ /* assume 16M as default incase uboot fails to pass proper ramsize */
++ unsigned long memsize = 16;
++ char **envp = (char **) KSEG1ADDR(fw_arg2);
++
++ ioport_resource.start = IOPORT_RESOURCE_START;
++ ioport_resource.end = IOPORT_RESOURCE_END;
++ iomem_resource.start = IOMEM_RESOURCE_START;
++ iomem_resource.end = IOMEM_RESOURCE_END;
++
++ set_io_port_base((unsigned long) KSEG1);
++
++ while (*envp) {
++ char *e = (char *)KSEG1ADDR(*envp);
++ if (!strncmp(e, "memsize=", 8)) {
++ e += 8;
++ if (strict_strtoul(e, 0, &memsize))
++ pr_warn("bad memsize specified\n");
++ }
++ envp++;
++ }
++ memsize *= 1024 * 1024;
++ add_memory_region(0x00000000, memsize, BOOT_MEM_RAM);
++}
+--- a/arch/mips/Kbuild.platforms
++++ b/arch/mips/Kbuild.platforms
+@@ -11,6 +11,7 @@
+ platforms += emma
+ platforms += jazz
+ platforms += jz4740
++platforms += lantiq
+ platforms += lasat
+ platforms += loongson
+ platforms += mipssim
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