ARM: mach-shmobile: r8a7779 and Marzen base support V2

Initial support for the r8a7779 SoC and the Marzen board (V2).

Only SCIF ports and the TMU are supported at this point.

To keep things simple only entity-mapped virt-to-phys mappings
are supported. This forces drivers and other SoC glue code to
make use of ioremap(). We cannot support early serial console
due to virtual address space collisions with the ARM kernel.

Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

1 files changed, 110 insertions, 0 deletions

diff --git a/arch/arm/mach-shmobile/board-marzen.c b/arch/arm/mach-shmobile/board-marzen.c
new file mode 100644
index 000000000000..d958cd49917f
--- /dev/null
+++ b/arch/arm/mach-shmobile/board-marzen.c
@@ -0,0 +1,110 @@
+/*
+ * marzen board support
+ *
+ * Copyright (C) 2011  Renesas Solutions Corp.
+ * Copyright (C) 2011  Magnus Damm
+ *
+ * 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; version 2 of the License.
+ *
+ * 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., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <linux/platform_device.h>
+#include <linux/delay.h>
+#include <linux/io.h>
+#include <linux/dma-mapping.h>
+#include <mach/hardware.h>
+#include <mach/r8a7779.h>
+#include <mach/common.h>
+#include <asm/mach-types.h>
+#include <asm/mach/arch.h>
+#include <asm/mach/map.h>
+#include <asm/mach/time.h>
+#include <asm/hardware/gic.h>
+#include <asm/traps.h>
+
+static struct platform_device *marzen_devices[] __initdata = {
+};
+
+static struct map_desc marzen_io_desc[] __initdata = {
+	/* 2M entity map for 0xf0000000 (MPCORE) */
+	{
+		.virtual	= 0xf0000000,
+		.pfn		= __phys_to_pfn(0xf0000000),
+		.length		= SZ_2M,
+		.type		= MT_DEVICE_NONSHARED
+	},
+	/* 16M entity map for 0xfexxxxxx (DMAC-S/HPBREG/INTC2/LRAM/DBSC) */
+	{
+		.virtual	= 0xfe000000,
+		.pfn		= __phys_to_pfn(0xfe000000),
+		.length		= SZ_16M,
+		.type		= MT_DEVICE_NONSHARED
+	},
+};
+
+static void __init marzen_map_io(void)
+{
+	iotable_init(marzen_io_desc, ARRAY_SIZE(marzen_io_desc));
+}
+
+static void __init marzen_init_early(void)
+{
+	r8a7779_add_early_devices();
+
+	/* Early serial console setup is not included here due to
+	 * memory map collisions. The SCIF serial ports in r8a7779
+	 * are difficult to entity map 1:1 due to collision with the
+	 * virtual memory range used by the coherent DMA code on ARM.
+	 *
+	 * Anyone wanting to debug early can remove UPF_IOREMAP from
+	 * the sh-sci serial console platform data, adjust mapbase
+	 * to a static M:N virt:phys mapping that needs to be added to
+	 * the mappings passed with iotable_init() above.
+	 *
+	 * Then add a call to shmobile_setup_console() from this function.
+	 *
+	 * As a final step pass earlyprint=sh-sci.2,115200 on the kernel
+	 * command line.
+	 */
+}
+
+static void __init marzen_init(void)
+{
+	r8a7779_add_standard_devices();
+	platform_add_devices(marzen_devices, ARRAY_SIZE(marzen_devices));
+}
+
+static void __init marzen_timer_init(void)
+{
+	r8a7779_clock_init();
+	shmobile_timer.init();
+	return;
+}
+
+struct sys_timer marzen_timer = {
+	.init	= marzen_timer_init,
+};
+
+MACHINE_START(MARZEN, "marzen")
+	.map_io		= marzen_map_io,
+	.init_early	= marzen_init_early,
+	.nr_irqs	= NR_IRQS_LEGACY,
+	.init_irq	= r8a7779_init_irq,
+	.handle_irq	= shmobile_handle_irq_gic,
+	.init_machine	= marzen_init,
+	.timer		= &marzen_timer,
+MACHINE_END