ARM: socfpga: initial support for Altera's SOCFPGA platform

Adding core definitions for Altera's SOCFPGA ARM platform.
Mininum support for Altera's SOCFPGA Cyclone 5 hardware.

Signed-off-by: Dinh Nguyen <dinguyen@altera.com>
Reviewed-by: Pavel Machek <pavel@denx.de>
Reviewed-by: Rob Herring <rob.herring@calxeda.com>
Reviewed-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

6 files changed, 112 insertions, 0 deletions

diff --git a/arch/arm/mach-socfpga/Makefile b/arch/arm/mach-socfpga/Makefile
new file mode 100644
index 00000000000..4fb93240971
--- /dev/null
+++ b/arch/arm/mach-socfpga/Makefile
@@ -0,0 +1,5 @@
+#
+# Makefile for the linux kernel.
+#
+
+obj-y					:= socfpga.o
diff --git a/arch/arm/mach-socfpga/Makefile.boot b/arch/arm/mach-socfpga/Makefile.boot
new file mode 100644
index 00000000000..dae9661a768
--- /dev/null
+++ b/arch/arm/mach-socfpga/Makefile.boot
@@ -0,0 +1 @@
+zreladdr-y	:= 0x00008000
diff --git a/arch/arm/mach-socfpga/include/mach/debug-macro.S b/arch/arm/mach-socfpga/include/mach/debug-macro.S
new file mode 100644
index 00000000000..d6f26d23374
--- /dev/null
+++ b/arch/arm/mach-socfpga/include/mach/debug-macro.S
@@ -0,0 +1,16 @@
+/*
+ *  Copyright (C) 1994-1999 Russell King
+ *  Moved from linux/arch/arm/kernel/debug.S by Ben Dooks
+ *
+ * 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.
+ */
+
+		.macro	addruart, rp, rv, tmp
+		mov	\rp, #DEBUG_LL_UART_OFFSET
+		orr	\rp, \rp, #0x00c00000
+		orr	\rv, \rp, #0xfe000000	@ virtual base
+		orr	\rp, \rp, #0xff000000	@ physical base
+		.endm
+
diff --git a/arch/arm/mach-socfpga/include/mach/timex.h b/arch/arm/mach-socfpga/include/mach/timex.h
new file mode 100644
index 00000000000..43df4354e46
--- /dev/null
+++ b/arch/arm/mach-socfpga/include/mach/timex.h
@@ -0,0 +1,19 @@
+/*
+ *  Copyright (C) 2003 ARM Limited
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * 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
+ */
+
+#define CLOCK_TICK_RATE		(50000000 / 16)
diff --git a/arch/arm/mach-socfpga/include/mach/uncompress.h b/arch/arm/mach-socfpga/include/mach/uncompress.h
new file mode 100644
index 00000000000..bbe20e69632
--- /dev/null
+++ b/arch/arm/mach-socfpga/include/mach/uncompress.h
@@ -0,0 +1,9 @@
+#ifndef __MACH_UNCOMPRESS_H
+#define __MACH_UNCOMPRESS_H
+
+#define putc(c)
+#define flush()
+#define arch_decomp_setup()
+#define arch_decomp_wdog()
+
+#endif
diff --git a/arch/arm/mach-socfpga/socfpga.c b/arch/arm/mach-socfpga/socfpga.c
new file mode 100644
index 00000000000..f01e1ebf539
--- /dev/null
+++ b/arch/arm/mach-socfpga/socfpga.c
@@ -0,0 +1,62 @@
+/*
+ *  Copyright (C) 2012 Altera Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * 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, see <http://www.gnu.org/licenses/>.
+ */
+#include <linux/dw_apb_timer.h>
+#include <linux/of_irq.h>
+#include <linux/of_platform.h>
+
+#include <asm/hardware/cache-l2x0.h>
+#include <asm/hardware/gic.h>
+#include <asm/mach/arch.h>
+
+extern void socfpga_init_clocks(void);
+
+const static struct of_device_id irq_match[] = {
+	{ .compatible = "arm,cortex-a9-gic", .data = gic_of_init, },
+	{}
+};
+
+static void __init gic_init_irq(void)
+{
+	of_irq_init(irq_match);
+}
+
+static void socfpga_cyclone5_restart(char mode, const char *cmd)
+{
+	/* TODO: */
+}
+
+static void __init socfpga_cyclone5_init(void)
+{
+	l2x0_of_init(0, ~0UL);
+	of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
+	socfpga_init_clocks();
+}
+
+static const char *altera_dt_match[] = {
+	"altr,socfpga",
+	"altr,socfpga-cyclone5",
+	NULL
+};
+
+DT_MACHINE_START(SOCFPGA, "Altera SOCFPGA")
+	.init_irq	= gic_init_irq,
+	.handle_irq     = gic_handle_irq,
+	.timer		= &dw_apb_timer,
+	.init_machine	= socfpga_cyclone5_init,
+	.restart	= socfpga_cyclone5_restart,
+	.dt_compat	= altera_dt_match,
+MACHINE_END