ARM: shmobile: add R8A7778 basis support

Add initial support for the R8A7778 R-Car M1A SoC.
No static virtual mappings are used, all the components
make use of ioremap().
DT_MACHINE_START is still wrapped
in CONFIG_USE_OF to match other mach-shmobile code.

It is based on v1.0 datasheet
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Acked-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

arch/arm/boot/dts/r8a7778.dtsi

+/*
+ * Device Tree Source for Renesas r8a7778
+ *
+ * Copyright (C) 2013  Renesas Solutions Corp.
+ * Copyright (C) 2013  Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
+ *
+ * based on r8a7779
+ *
+ * Copyright (C) 2013 Renesas Solutions Corp.
+ * Copyright (C) 2013 Simon Horman
+ *
+ * This file is licensed under the terms of the GNU General Public License
+ * version 2.  This program is licensed "as is" without any warranty of any
+ * kind, whether express or implied.
+ */
+
+/include/ "skeleton.dtsi"
+
+/ {
+	compatible = "renesas,r8a7778";
+
+	cpus {
+		cpu@0 {
+			compatible = "arm,cortex-a9";
+		};
+	};
+
+	gic: interrupt-controller@fe438000 {
+		compatible = "arm,cortex-a9-gic";
+		#interrupt-cells = <3>;
+		interrupt-controller;
+		reg = <0xfe438000 0x1000>,
+		      <0xfe430000 0x100>;
+	};
+};

arch/arm/mach-shmobile/Kconfig

@@ -33,6 +33,12 @@ config ARCH_R8A7740
 	select CPU_V7
 	select SH_CLK_CPG
 
+config ARCH_R8A7778
+	bool "R-Car M1 (R8A77780)"
+	select CPU_V7
+	select SH_CLK_CPG
+	select ARM_GIC
+
 config ARCH_R8A7779
 	bool "R-Car H1 (R8A77790)"
 	select ARCH_WANT_OPTIONAL_GPIOLIB

arch/arm/mach-shmobile/Makefile

@@ -10,6 +10,7 @@ obj-$(CONFIG_ARCH_SH7372)	+= setup-sh7372.o clock-sh7372.o intc-sh7372.o
 obj-$(CONFIG_ARCH_SH73A0)	+= setup-sh73a0.o clock-sh73a0.o intc-sh73a0.o
 obj-$(CONFIG_ARCH_R8A73A4)	+= setup-r8a73a4.o clock-r8a73a4.o
 obj-$(CONFIG_ARCH_R8A7740)	+= setup-r8a7740.o clock-r8a7740.o intc-r8a7740.o
+obj-$(CONFIG_ARCH_R8A7778)	+= setup-r8a7778.o clock-r8a7778.o
 obj-$(CONFIG_ARCH_R8A7779)	+= setup-r8a7779.o clock-r8a7779.o intc-r8a7779.o
 obj-$(CONFIG_ARCH_EMEV2)	+= setup-emev2.o clock-emev2.o
 

arch/arm/mach-shmobile/clock-r8a7778.c

+/*
+ * r8a7778 clock framework support
+ *
+ * Copyright (C) 2013  Renesas Solutions Corp.
+ * Copyright (C) 2013  Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
+ *
+ * based on r8a7779
+ *
+ * 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; either 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#include <linux/io.h>
+#include <linux/sh_clk.h>
+#include <linux/clkdev.h>
+#include <mach/common.h>
+
+#define MSTPCR0		IOMEM(0xffc80030)
+#define MSTPCR1		IOMEM(0xffc80034)
+#define MSTPCR3		IOMEM(0xffc8003c)
+#define MSTPSR1		IOMEM(0xffc80044)
+#define MSTPSR4		IOMEM(0xffc80048)
+#define MSTPSR6		IOMEM(0xffc8004c)
+#define MSTPCR4		IOMEM(0xffc80050)
+#define MSTPCR5		IOMEM(0xffc80054)
+#define MSTPCR6		IOMEM(0xffc80058)
+
+/* ioremap() through clock mapping mandatory to avoid
+ * collision with ARM coherent DMA virtual memory range.
+ */
+
+static struct clk_mapping cpg_mapping = {
+	.phys	= 0xffc80000,
+	.len	= 0x80,
+};
+
+static struct clk clkp = {
+	.rate   = 62500000, /* FIXME: shortcut */
+	.flags  = CLK_ENABLE_ON_INIT,
+	.mapping = &cpg_mapping,
+};
+
+static struct clk *main_clks[] = {
+	&clkp,
+};
+
+enum {
+	MSTP016, MSTP015,
+	MSTP_NR };
+
+static struct clk mstp_clks[MSTP_NR] = {
+	[MSTP016] = SH_CLK_MSTP32(&clkp, MSTPCR0, 16, 0), /* TMU0 */
+	[MSTP015] = SH_CLK_MSTP32(&clkp, MSTPCR0, 15, 0), /* TMU1 */
+};
+
+static struct clk_lookup lookups[] = {
+	/* MSTP32 clocks */
+	CLKDEV_DEV_ID("sh_tmu.0", &mstp_clks[MSTP016]), /* TMU00 */
+	CLKDEV_DEV_ID("sh_tmu.1", &mstp_clks[MSTP015]), /* TMU01 */
+};
+
+void __init r8a7778_clock_init(void)
+{
+	int k, ret = 0;
+
+	for (k = 0; !ret && (k < ARRAY_SIZE(main_clks)); k++)
+		ret = clk_register(main_clks[k]);
+
+	if (!ret)
+		ret = sh_clk_mstp_register(mstp_clks, MSTP_NR);
+
+	clkdev_add_table(lookups, ARRAY_SIZE(lookups));
+
+	if (!ret)
+		shmobile_clk_init();
+	else
+		panic("failed to setup r8a7778 clocks\n");
+}

arch/arm/mach-shmobile/include/mach/r8a7778.h

+/*
+ * Copyright (C) 2013  Renesas Solutions Corp.
+ * Copyright (C) 2013  Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
+ *
+ * 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
+ */
+#ifndef __ASM_R8A7778_H__
+#define __ASM_R8A7778_H__
+
+extern void r8a7778_add_standard_devices(void);
+extern void r8a7778_add_standard_devices_dt(void);
+extern void r8a7778_init_delay(void);
+extern void r8a7778_init_irq(void);
+extern void r8a7778_init_irq_dt(void);
+extern void r8a7778_clock_init(void);
+
+#endif /* __ASM_R8A7778_H__ */

arch/arm/mach-shmobile/setup-r8a7778.c

+/*
+ * r8a7778 processor support
+ *
+ * Copyright (C) 2013  Renesas Solutions Corp.
+ * Copyright (C) 2013  Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
+ *
+ * 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/io.h>
+#include <linux/irqchip/arm-gic.h>
+#include <linux/of.h>
+#include <linux/of_platform.h>
+#include <linux/platform_device.h>
+#include <linux/irqchip.h>
+#include <linux/sh_timer.h>
+#include <mach/irqs.h>
+#include <mach/r8a7778.h>
+#include <mach/common.h>
+#include <asm/mach/arch.h>
+#include <asm/hardware/cache-l2x0.h>
+
+/* TMU */
+static struct resource sh_tmu0_resources[] = {
+	DEFINE_RES_MEM(0xffd80008, 12),
+	DEFINE_RES_IRQ(gic_iid(0x40)),
+};
+
+static struct sh_timer_config sh_tmu0_platform_data = {
+	.name			= "TMU00",
+	.channel_offset		= 0x4,
+	.timer_bit		= 0,
+	.clockevent_rating	= 200,
+};
+
+static struct resource sh_tmu1_resources[] = {
+	DEFINE_RES_MEM(0xffd80014, 12),
+	DEFINE_RES_IRQ(gic_iid(0x41)),
+};
+
+static struct sh_timer_config sh_tmu1_platform_data = {
+	.name			= "TMU01",
+	.channel_offset		= 0x10,
+	.timer_bit		= 1,
+	.clocksource_rating	= 200,
+};
+
+#define PLATFORM_INFO(n, i)					\
+{								\
+	.parent		= &platform_bus,			\
+	.name		= #n,					\
+	.id		= i,					\
+	.res		= n ## i ## _resources,			\
+	.num_res	= ARRAY_SIZE(n ## i ##_resources),	\
+	.data		= &n ## i ##_platform_data,		\
+	.size_data	= sizeof(n ## i ## _platform_data),	\
+}
+
+struct platform_device_info platform_devinfo[] = {
+	PLATFORM_INFO(sh_tmu, 0),
+	PLATFORM_INFO(sh_tmu, 1),
+};
+
+void __init r8a7778_add_standard_devices(void)
+{
+	int i;
+
+#ifdef CONFIG_CACHE_L2X0
+	void __iomem *base = ioremap_nocache(0xf0100000, 0x1000);
+	if (base) {
+		/*
+		 * Early BRESP enable, Shared attribute override enable, 64K*16way
+		 * don't call iounmap(base)
+		 */
+		l2x0_init(base, 0x40470000, 0x82000fff);
+	}
+#endif
+
+	for (i = 0; i < ARRAY_SIZE(platform_devinfo); i++)
+		platform_device_register_full(&platform_devinfo[i]);
+}
+
+#define INT2SMSKCR0	0x82288 /* 0xfe782288 */
+#define INT2SMSKCR1	0x8228c /* 0xfe78228c */
+
+#define INT2NTSR0	0x00018 /* 0xfe700018 */
+#define INT2NTSR1	0x0002c /* 0xfe70002c */
+static void __init r8a7778_init_irq_common(void)
+{
+	void __iomem *base = ioremap_nocache(0xfe700000, 0x00100000);
+
+	BUG_ON(!base);
+
+	/* route all interrupts to ARM */
+	__raw_writel(0x73ffffff, base + INT2NTSR0);
+	__raw_writel(0xffffffff, base + INT2NTSR1);
+
+	/* unmask all known interrupts in INTCS2 */
+	__raw_writel(0x08330773, base + INT2SMSKCR0);
+	__raw_writel(0x00311110, base + INT2SMSKCR1);
+
+	iounmap(base);
+}
+
+void __init r8a7778_init_irq(void)
+{
+	void __iomem *gic_dist_base;
+	void __iomem *gic_cpu_base;
+
+	gic_dist_base = ioremap_nocache(0xfe438000, PAGE_SIZE);
+	gic_cpu_base  = ioremap_nocache(0xfe430000, PAGE_SIZE);
+	BUG_ON(!gic_dist_base || !gic_cpu_base);
+
+	/* use GIC to handle interrupts */
+	gic_init(0, 29, gic_dist_base, gic_cpu_base);
+
+	r8a7778_init_irq_common();
+}
+
+void __init r8a7778_init_delay(void)
+{
+	shmobile_setup_delay(800, 1, 3); /* Cortex-A9 @ 800MHz */
+}
+
+#ifdef CONFIG_USE_OF
+void __init r8a7778_init_irq_dt(void)
+{
+	irqchip_init();
+	r8a7778_init_irq_common();
+}
+
+static const struct of_dev_auxdata r8a7778_auxdata_lookup[] __initconst = {
+	{},
+};
+
+void __init r8a7778_add_standard_devices_dt(void)
+{
+	of_platform_populate(NULL, of_default_bus_match_table,
+			     r8a7778_auxdata_lookup, NULL);
+}
+
+static const char *r8a7778_compat_dt[] __initdata = {
+	"renesas,r8a7778",
+	NULL,
+};
+
+DT_MACHINE_START(R8A7778_DT, "Generic R8A7778 (Flattened Device Tree)")
+	.init_early	= r8a7778_init_delay,
+	.init_irq	= r8a7778_init_irq_dt,
+	.init_machine	= r8a7778_add_standard_devices_dt,
+	.init_time	= shmobile_timer_init,
+	.dt_compat	= r8a7778_compat_dt,
+MACHINE_END
+
+#endif /* CONFIG_USE_OF */