[ARM] tegra: initial tegra support

v2: Fixes from Mike Rapoport
	- remove unused header files (mach/dma.h and mach/nand.h)
	- remove tegra 1 references from Makefile.boot

v2: fixes from Russell King
	- remove mach/io.h include from mach/iomap.h
	- fix whitespace in Kconfig

v2: from Colin Cross
	- fix invalid immediate in debug-macro.S

v3:
	- allow selection of multiple boards

Signed-off-by: Colin Cross <ccross@android.com>
Signed-off-by: Erik Gilling <konkers@android.com>

arch/arm/Kconfig

@@ -562,6 +562,17 @@ config ARCH_NUC93X
 	  Support for Nuvoton (Winbond logic dept.) NUC93X MCU,The NUC93X is a
 	  low-power and high performance MPEG-4/JPEG multimedia controller chip.
 
+config ARCH_TEGRA
+	bool "NVIDIA Tegra"
+	select GENERIC_TIME
+	select GENERIC_CLOCKEVENTS
+	select GENERIC_GPIO
+	select HAVE_CLK
+	select ARCH_HAS_BARRIERS if CACHE_L2X0
+	help
+	  This enables support for NVIDIA Tegra based systems (Tegra APX,
+	  Tegra 6xx and Tegra 2 series).
+
 config ARCH_PNX4008
 	bool "Philips Nexperia PNX4008 Mobile"
 	select CPU_ARM926T
@@ -911,6 +922,8 @@ source "arch/arm/mach-shmobile/Kconfig"
 
 source "arch/arm/plat-stmp3xxx/Kconfig"
 
+source "arch/arm/mach-tegra/Kconfig"
+
 source "arch/arm/mach-u300/Kconfig"
 
 source "arch/arm/mach-ux500/Kconfig"

arch/arm/Makefile

@@ -179,6 +179,7 @@ machine-$(CONFIG_ARCH_SHARK)		:= shark
 machine-$(CONFIG_ARCH_SHMOBILE) 	:= shmobile
 machine-$(CONFIG_ARCH_STMP378X)		:= stmp378x
 machine-$(CONFIG_ARCH_STMP37XX)		:= stmp37xx
+machine-$(CONFIG_ARCH_TEGRA)		:= tegra
 machine-$(CONFIG_ARCH_U300)		:= u300
 machine-$(CONFIG_ARCH_U8500)		:= ux500
 machine-$(CONFIG_ARCH_VERSATILE)	:= versatile

arch/arm/mach-tegra/Kconfig

@@ -0,0 +1,49 @@
+if ARCH_TEGRA
+
+comment "NVIDIA Tegra options"
+
+choice
+	prompt "Select Tegra processor family for target system"
+
+config ARCH_TEGRA_2x_SOC
+	bool "Tegra 2 family"
+	select CPU_V7
+	select ARM_GIC
+	help
+	  Support for NVIDIA Tegra AP20 and T20 processors, based on the
+	  ARM CortexA9MP CPU and the ARM PL310 L2 cache controller
+
+endchoice
+
+comment "Tegra board type"
+
+config MACH_HARMONY
+       bool "Harmony board"
+       help
+         Support for nVidia Harmony development platform
+
+choice
+        prompt "Low-level debug console UART"
+        default TEGRA_DEBUG_UART_NONE
+
+config TEGRA_DEBUG_UART_NONE
+        bool "None"
+
+config TEGRA_DEBUG_UARTA
+        bool "UART-A"
+
+config TEGRA_DEBUG_UARTB
+        bool "UART-B"
+
+config TEGRA_DEBUG_UARTC
+        bool "UART-C"
+
+config TEGRA_DEBUG_UARTD
+        bool "UART-D"
+
+config TEGRA_DEBUG_UARTE
+        bool "UART-E"
+
+endchoice
+
+endif

arch/arm/mach-tegra/Makefile

@@ -0,0 +1,2 @@
+obj-y                                   += common.o
+obj-y                                   += io.o

arch/arm/mach-tegra/Makefile.boot

@@ -0,0 +1,3 @@
+zreladdr-$(CONFIG_ARCH_TEGRA_2x_SOC)	:= 0x00008000
+params_phys-$(CONFIG_ARCH_TEGRA_2x_SOC)	:= 0x00000100
+initrd_phys-$(CONFIG_ARCH_TEGRA_2x_SOC)	:= 0x00800000

arch/arm/mach-tegra/board.h

@@ -0,0 +1,32 @@
+/*
+ * arch/arm/mach-tegra/board.h
+ *
+ * Copyright (C) 2010 Google, Inc.
+ *
+ * Author:
+ *	Colin Cross <ccross@google.com>
+ *	Erik Gilling <konkers@google.com>
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that 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.
+ *
+ */
+
+#ifndef __MACH_TEGRA_BOARD_H
+#define __MACH_TEGRA_BOARD_H
+
+#include <linux/types.h>
+
+void __init tegra_common_init(void);
+void __init tegra_map_common_io(void);
+void __init tegra_init_irq(void);
+void __init tegra_init_clock(void);
+
+extern struct sys_timer tegra_timer;
+#endif

arch/arm/mach-tegra/common.c

@@ -0,0 +1,44 @@
+/*
+ * arch/arm/mach-tegra/board-harmony.c
+ *
+ * Copyright (C) 2010 Google, Inc.
+ *
+ * Author:
+ *	Colin Cross <ccross@android.com>
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that 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.
+ *
+ */
+
+#include <linux/init.h>
+#include <linux/io.h>
+
+#include <asm/hardware/cache-l2x0.h>
+
+#include <mach/iomap.h>
+
+#include "board.h"
+
+void __init tegra_init_cache(void)
+{
+#ifdef CONFIG_CACHE_L2X0
+	void __iomem *p = IO_ADDRESS(TEGRA_ARM_PERIF_BASE) + 0x3000;
+
+	writel(0x331, p + L2X0_TAG_LATENCY_CTRL);
+	writel(0x441, p + L2X0_DATA_LATENCY_CTRL);
+
+	l2x0_init(p, 0x6C080001, 0x8200c3fe);
+#endif
+}
+
+void __init tegra_common_init(void)
+{
+	tegra_init_cache();
+}

arch/arm/mach-tegra/include/mach/barriers.h

@@ -0,0 +1,30 @@
+/*
+ * arch/arm/mach-realview/include/mach/barriers.h
+ *
+ * Copyright (C) 2010 ARM Ltd.
+ * Written by Catalin Marinas <catalin.marinas@arm.com>
+ *
+ * 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.
+ *
+ * This program is distributed in the hope that 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
+ */
+
+#ifndef __MACH_BARRIERS_H
+#define __MACH_BARRIERS_H
+
+#include <asm/outercache.h>
+
+#define rmb()		dmb()
+#define wmb()		do { dsb(); outer_sync(); } while (0)
+#define mb()		wmb()
+
+#endif	/* __MACH_BARRIERS_H */

arch/arm/mach-tegra/include/mach/debug-macro.S

@@ -0,0 +1,46 @@
+/*
+ * arch/arm/mach-tegra/include/mach/debug-macro.S
+ *
+ * Copyright (C) 2010 Google, Inc.
+ *
+ * Author:
+ *	Colin Cross <ccross@google.com>
+ *	Erik Gilling <konkers@google.com>
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that 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.
+ *
+ */
+
+#include <mach/io.h>
+
+	.macro  addruart,rx, tmp
+        mrc     p15, 0, \rx, c1, c0
+        tst     \rx, #1                 @ MMU enabled?
+        ldreq   \rx, =IO_APB_PHYS       @ physical
+        ldrne   \rx, =IO_APB_VIRT        @ virtual
+#if defined(CONFIG_TEGRA_DEBUG_UART_NONE)
+#error "A debug UART must be selected in the kernel config to use DEBUG_LL"
+#elif defined(CONFIG_TEGRA_DEBUG_UARTA)
+        orr     \rx, \rx, #0x6000
+#elif defined(CONFIG_TEGRA_DEBUG_UARTB)
+	ldr	\tmp, =0x6040
+        orr     \rx, \rx, \tmp
+#elif defined(CONFIG_TEGRA_DEBUG_UARTC)
+        orr     \rx, \rx, #0x6200
+#elif defined(CONFIG_TEGRA_DEBUG_UARTD)
+        orr     \rx, \rx, #0x6300
+#elif defined(CONFIG_TEGRA_DEBUG_UARTE)
+        orr     \rx, \rx, #0x6400
+#endif
+	.endm
+
+#define UART_SHIFT	2
+#include <asm/hardware/debug-8250.S>
+

arch/arm/mach-tegra/include/mach/entry-macro.S

@@ -0,0 +1,118 @@
+/* arch/arm/mach-tegra/include/mach/entry-macro.S
+ *
+ * Copyright (C) 2009 Palm, Inc.
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that 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.
+ *
+ */
+#include <mach/iomap.h>
+#include <mach/io.h>
+
+#if defined(CONFIG_ARM_GIC)
+
+#include <asm/hardware/gic.h>
+
+	/* Uses the GIC interrupt controller built into the cpu */
+#define ICTRL_BASE (IO_CPU_VIRT + 0x100)
+
+	.macro	disable_fiq
+	.endm
+
+	.macro	get_irqnr_preamble, base, tmp
+	movw \base, #(ICTRL_BASE & 0x0000ffff)
+	movt \base, #((ICTRL_BASE & 0xffff0000) >> 16)
+	.endm
+
+	.macro  arch_ret_to_user, tmp1, tmp2
+	.endm
+
+	/*
+	 * The interrupt numbering scheme is defined in the
+	 * interrupt controller spec.  To wit:
+	 *
+	 * Interrupts 0-15 are IPI
+	 * 16-28 are reserved
+	 * 29-31 are local.  We allow 30 to be used for the watchdog.
+	 * 32-1020 are global
+	 * 1021-1022 are reserved
+	 * 1023 is "spurious" (no interrupt)
+	 *
+	 * For now, we ignore all local interrupts so only return an interrupt
+	 * if it's between 30 and 1020.  The test_for_ipi routine below will
+	 * pick up on IPIs.
+	 *
+	 * A simple read from the controller will tell us the number of the
+	 * highest priority enabled interrupt.  We then just need to check
+	 * whether it is in the valid range for an IRQ (30-1020 inclusive).
+	 */
+
+	.macro  get_irqnr_and_base, irqnr, irqstat, base, tmp
+
+	/* bits 12-10 = src CPU, 9-0 = int # */
+	ldr     \irqstat, [\base, #GIC_CPU_INTACK]
+
+	ldr		\tmp, =1021
+
+	bic     \irqnr, \irqstat, #0x1c00
+
+	cmp     \irqnr, #29
+	cmpcc	\irqnr, \irqnr
+	cmpne	\irqnr, \tmp
+	cmpcs	\irqnr, \irqnr
+
+	.endm
+
+	/* We assume that irqstat (the raw value of the IRQ acknowledge
+	 * register) is preserved from the macro above.
+	 * If there is an IPI, we immediately signal end of interrupt on the
+	 * controller, since this requires the original irqstat value which
+	 * we won't easily be able to recreate later.
+	 */
+
+	.macro test_for_ipi, irqnr, irqstat, base, tmp
+	bic	\irqnr, \irqstat, #0x1c00
+	cmp	\irqnr, #16
+	strcc	\irqstat, [\base, #GIC_CPU_EOI]
+	cmpcs	\irqnr, \irqnr
+	.endm
+
+	/* As above, this assumes that irqstat and base are preserved.. */
+
+	.macro test_for_ltirq, irqnr, irqstat, base, tmp
+	bic	\irqnr, \irqstat, #0x1c00
+	mov 	\tmp, #0
+	cmp	\irqnr, #29
+	moveq	\tmp, #1
+	streq	\irqstat, [\base, #GIC_CPU_EOI]
+	cmp	\tmp, #0
+	.endm
+
+#else
+	/* legacy interrupt controller for AP16 */
+	.macro	disable_fiq
+	.endm
+
+	.macro	get_irqnr_preamble, base, tmp
+	@ enable imprecise aborts
+	cpsie	a
+	@ EVP base at 0xf010f000
+	mov \base, #0xf0000000
+	orr \base, #0x00100000
+	orr \base, #0x0000f000
+	.endm
+
+	.macro	arch_ret_to_user, tmp1, tmp2
+	.endm
+
+	.macro	get_irqnr_and_base, irqnr, irqstat, base, tmp
+	ldr \irqnr, [\base, #0x20]	@ EVT_IRQ_STS
+	cmp \irqnr, #0x80
+	.endm
+#endif

arch/arm/mach-tegra/include/mach/hardware.h

@@ -0,0 +1,24 @@
+/*
+ * arch/arm/mach-tegra/include/mach/hardware.h
+ *
+ * Copyright (C) 2010 Google, Inc.
+ *
+ * Author:
+ *	Colin Cross <ccross@google.com>
+ *	Erik Gilling <konkers@google.com>
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that 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.
+ *
+ */
+
+#ifndef __MACH_TEGRA_HARDWARE_H
+#define __MACH_TEGRA_HARDWARE_H
+
+#endif