ARM: mach-shmobile: SH-Mobile G3 support.

This adds preliminary support for the SH-Mobile G-series.

The SH-Mobile G-series is a series of ARM/SH multi-core CPUs that aside
from the ARM MPU are primarily composed of existing SH IP blocks.

This includes initial support for the SH7367 (SH-Mobile G3) CPU and
the G3EVM reference board.

Only timer, serial console, and NOR flash are supported at this point.
Patches for the interrupt controller, pinmux support, clock framework
and runtime pm will be submitted as feature patches on top of this.

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

arch/arm/Kconfig

@@ -584,6 +584,11 @@ config ARCH_MSM
 	  interface to the ARM9 modem processor which runs the baseband stack
 	  and controls some vital subsystems (clock and power control, etc).
 
+config ARCH_SHMOBILE
+	bool "Renesas SH-Mobile"
+	help
+	  Support for Renesas's SH-Mobile ARM platforms
+
 config ARCH_RPC
 	bool "RiscPC"
 	select ARCH_ACORN
@@ -822,6 +827,8 @@ source "arch/arm/mach-s3c6400/Kconfig"
 source "arch/arm/mach-s3c6410/Kconfig"
 endif
 
+source "arch/arm/mach-shmobile/Kconfig"
+
 source "arch/arm/plat-stmp3xxx/Kconfig"
 
 if ARCH_S5PC1XX

arch/arm/Makefile

@@ -165,6 +165,7 @@ machine-$(CONFIG_ARCH_S3C64XX)		:= s3c6400 s3c6410
 machine-$(CONFIG_ARCH_S5PC1XX)		:= s5pc100
 machine-$(CONFIG_ARCH_SA1100)		:= sa1100
 machine-$(CONFIG_ARCH_SHARK)		:= shark
+machine-$(CONFIG_ARCH_SHMOBILE) 	:= shmobile
 machine-$(CONFIG_ARCH_STMP378X)		:= stmp378x
 machine-$(CONFIG_ARCH_STMP37XX)		:= stmp37xx
 machine-$(CONFIG_ARCH_U300)		:= u300

arch/arm/mach-shmobile/Kconfig

@@ -0,0 +1,53 @@
+if ARCH_SHMOBILE
+
+comment "SH-Mobile System Type"
+
+config ARCH_SH7367
+	bool "SH-Mobile G3 (SH7367)"
+	select CPU_V6
+	select HAVE_CLK
+	select COMMON_CLKDEV
+	select GENERIC_TIME
+	select GENERIC_CLOCKEVENTS
+
+comment "SH-Mobile Board Type"
+
+config MACH_G3EVM
+	bool "G3EVM board"
+	depends on ARCH_SH7367
+
+comment "SH-Mobile System Configuration"
+
+menu "Memory configuration"
+
+config MEMORY_START
+	hex "Physical memory start address"
+	default "0x50000000" if MACH_G3EVM
+	default "0x00000000"
+	---help---
+	  Tweak this only when porting to a new machine which does not
+	  already have a defconfig. Changing it from the known correct
+	  value on any of the known systems will only lead to disaster.
+
+config MEMORY_SIZE
+	hex "Physical memory size"
+	default "0x08000000" if MACH_G3EVM
+	default "0x04000000"
+	help
+	  This sets the default memory size assumed by your kernel. It can
+	  be overridden as normal by the 'mem=' argument on the kernel command
+	  line.
+
+endmenu
+
+menu "Timer and clock configuration"
+
+config SH_TIMER_CMT
+	bool "CMT timer driver"
+	default y
+	help
+	  This enables build of the CMT timer driver.
+
+endmenu
+
+endif

arch/arm/mach-shmobile/Makefile

@@ -0,0 +1,12 @@
+#
+# Makefile for the linux kernel.
+#
+
+# Common objects
+obj-y				:= timer.o
+
+# CPU objects
+obj-$(CONFIG_ARCH_SH7367)	+= setup-sh7367.o clock-sh7367.o
+
+# Board objects
+obj-$(CONFIG_MACH_G3EVM)	+= board-g3evm.o

arch/arm/mach-shmobile/Makefile.boot

@@ -0,0 +1,9 @@
+__ZRELADDR	:= $(shell /bin/bash -c 'printf "0x%08x" \
+		     $$[$(CONFIG_MEMORY_START) + 0x8000]')
+
+   zreladdr-y   := $(__ZRELADDR)
+
+# Unsupported legacy stuff
+#
+#params_phys-y (Instead: Pass atags pointer in r2)
+#initrd_phys-y (Instead: Use compiled-in initramfs)

arch/arm/mach-shmobile/board-g3evm.c

@@ -0,0 +1,127 @@
+/*
+ * G3EVM board support
+ *
+ * Copyright (C) 2010  Magnus Damm
+ * Copyright (C) 2008  Yoshihiro Shimoda
+ *
+ * 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/mtd/mtd.h>
+#include <linux/mtd/partitions.h>
+#include <linux/mtd/physmap.h>
+#include <linux/io.h>
+#include <mach/common.h>
+#include <asm/mach-types.h>
+#include <asm/mach/arch.h>
+#include <asm/mach/map.h>
+
+static struct mtd_partition nor_flash_partitions[] = {
+	{
+		.name		= "loader",
+		.offset		= 0x00000000,
+		.size		= 512 * 1024,
+	},
+	{
+		.name		= "bootenv",
+		.offset		= MTDPART_OFS_APPEND,
+		.size		= 512 * 1024,
+	},
+	{
+		.name		= "kernel_ro",
+		.offset		= MTDPART_OFS_APPEND,
+		.size		= 8 * 1024 * 1024,
+		.mask_flags	= MTD_WRITEABLE,
+	},
+	{
+		.name		= "kernel",
+		.offset		= MTDPART_OFS_APPEND,
+		.size		= 8 * 1024 * 1024,
+	},
+	{
+		.name		= "data",
+		.offset		= MTDPART_OFS_APPEND,
+		.size		= MTDPART_SIZ_FULL,
+	},
+};
+
+static struct physmap_flash_data nor_flash_data = {
+	.width		= 2,
+	.parts		= nor_flash_partitions,
+	.nr_parts	= ARRAY_SIZE(nor_flash_partitions),
+};
+
+static struct resource nor_flash_resources[] = {
+	[0]	= {
+		.start	= 0x00000000,
+		.end	= 0x08000000 - 1,
+		.flags	= IORESOURCE_MEM,
+	}
+};
+
+static struct platform_device nor_flash_device = {
+	.name		= "physmap-flash",
+	.dev		= {
+		.platform_data	= &nor_flash_data,
+	},
+	.num_resources	= ARRAY_SIZE(nor_flash_resources),
+	.resource	= nor_flash_resources,
+};
+
+
+static struct platform_device *g3evm_devices[] __initdata = {
+	&nor_flash_device,
+};
+
+static struct map_desc g3evm_io_desc[] __initdata = {
+	/* create a 1:1 entity map for 0xe6xxxxxx
+	 * used by CPGA, INTC and PFC.
+	 */
+	{
+		.virtual	= 0xe6000000,
+		.pfn		= __phys_to_pfn(0xe6000000),
+		.length		= 256 << 20,
+		.type		= MT_DEVICE_NONSHARED
+	},
+};
+
+static void __init g3evm_map_io(void)
+{
+	iotable_init(g3evm_io_desc, ARRAY_SIZE(g3evm_io_desc));
+
+	/* setup early devices and clocks here as well */
+	sh7367_add_early_devices();
+	sh7367_clock_init();
+}
+
+static void __init g3evm_init(void)
+{
+	sh7367_add_standard_devices();
+
+	platform_add_devices(g3evm_devices, ARRAY_SIZE(g3evm_devices));
+}
+
+MACHINE_START(G3EVM, "g3evm")
+	.phys_io	= 0xe6000000,
+	.io_pg_offst	= ((0xe6000000) >> 18) & 0xfffc,
+	.map_io		= g3evm_map_io,
+	.init_irq	= sh7367_init_irq,
+	.init_machine	= g3evm_init,
+	.timer		= &shmobile_timer,
+MACHINE_END

arch/arm/mach-shmobile/clock-sh7367.c

@@ -0,0 +1,89 @@
+/*
+ * Preliminary clock framework support for sh7367
+ *
+ * Copyright (C) 2010  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/init.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/list.h>
+#include <linux/clk.h>
+
+struct clk {
+	const char *name;
+	unsigned long rate;
+};
+
+#include <asm/clkdev.h>
+
+int __clk_get(struct clk *clk)
+{
+	return 1;
+}
+EXPORT_SYMBOL(__clk_get);
+
+void __clk_put(struct clk *clk)
+{
+}
+EXPORT_SYMBOL(__clk_put);
+
+
+int clk_enable(struct clk *clk)
+{
+	return 0;
+}
+EXPORT_SYMBOL(clk_enable);
+
+void clk_disable(struct clk *clk)
+{
+}
+EXPORT_SYMBOL(clk_disable);
+
+unsigned long clk_get_rate(struct clk *clk)
+{
+	return clk ? clk->rate : 0;
+}
+EXPORT_SYMBOL(clk_get_rate);
+
+/* a static peripheral clock for now - enough to get sh-sci working */
+static struct clk peripheral_clk = {
+	.name	    = "peripheral_clk",
+	.rate	    = 48000000,
+};
+
+/* a static rclk for now - enough to get sh_cmt working */
+static struct clk r_clk = {
+	.name	    = "r_clk",
+	.rate	    = 32768,
+};
+
+static struct clk_lookup lookups[] = {
+	{
+		.clk = &peripheral_clk,
+	}, {
+		.clk = &r_clk,
+	}
+};
+
+void __init sh7367_clock_init(void)
+{
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(lookups); i++) {
+		lookups[i].con_id = lookups[i].clk->name;
+		clkdev_add(&lookups[i]);
+	}
+}

arch/arm/mach-shmobile/include/mach/clkdev.h

@@ -0,0 +1,7 @@
+#ifndef __ASM_MACH_CLKDEV_H
+#define __ASM_MACH_CLKDEV_H
+
+int __clk_get(struct clk *clk);
+void __clk_put(struct clk *clk);
+
+#endif /* __ASM_MACH_CLKDEV_H */

arch/arm/mach-shmobile/include/mach/common.h

@@ -0,0 +1,11 @@
+#ifndef __ARCH_MACH_COMMON_H
+#define __ARCH_MACH_COMMON_H
+
+extern struct sys_timer shmobile_timer;
+
+extern void sh7367_init_irq(void);
+extern void sh7367_add_early_devices(void);
+extern void sh7367_add_standard_devices(void);
+extern void sh7367_clock_init(void);
+
+#endif /* __ARCH_MACH_COMMON_H */

arch/arm/mach-shmobile/include/mach/dma.h

@@ -0,0 +1 @@
+/* empty */

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

@@ -0,0 +1,39 @@
+/*
+ * Copyright (C) 2008 Renesas Solutions Corp.
+ *
+ * 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 <mach/hardware.h>
+#include <mach/irqs.h>
+
+	.macro  disable_fiq
+	.endm
+
+	.macro  get_irqnr_preamble, base, tmp
+	.endm
+
+	.macro  arch_ret_to_user, tmp1, tmp2
+	.endm
+
+	.macro  get_irqnr_and_base, irqnr, irqstat, base, tmp
+	ldr     \base, =INTFLGA
+	ldr     \irqnr, [\base]
+	cmp	\irqnr, #0
+	beq	1000f
+	/* intevt to irq number */
+	lsr	\irqnr, \irqnr, #0x5
+	subs	\irqnr, \irqnr, #16
+
+1000:
+	.endm

arch/arm/mach-shmobile/include/mach/gpio.h

@@ -0,0 +1 @@
+/* empty */

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

@@ -0,0 +1,7 @@
+#ifndef __ASM_MACH_HARDWARE_H
+#define __ASM_MACH_HARDWARE_H
+
+/* INTFLGA register - used by low level interrupt code in entry-macro.S */
+#define INTFLGA			0xe6980018
+
+#endif /* __ASM_MACH_HARDWARE_H */