/*
 * r8a7779 processor 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/of_platform.h>
#include <linux/platform_device.h>
#include <linux/delay.h>
#include <linux/input.h>
#include <linux/io.h>
#include <linux/serial_sci.h>
#include <linux/sh_intc.h>
#include <linux/sh_timer.h>
#include <mach/hardware.h>
#include <mach/irqs.h>
#include <mach/r8a7779.h>
#include <mach/common.h>
#include <asm/mach-types.h>
#include <asm/mach/arch.h>
#include <asm/mach/time.h>
#include <asm/mach/map.h>
#include <asm/hardware/cache-l2x0.h>

static struct map_desc r8a7779_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
	},
};

void __init r8a7779_map_io(void)
{
	iotable_init(r8a7779_io_desc, ARRAY_SIZE(r8a7779_io_desc));
}

static struct resource r8a7779_pfc_resources[] = {
	[0] = {
		.start	= 0xfffc0000,
		.end	= 0xfffc023b,
		.flags	= IORESOURCE_MEM,
	},
	[1] = {
		.start	= 0xffc40000,
		.end	= 0xffc46fff,
		.flags	= IORESOURCE_MEM,
	}
};

static struct platform_device r8a7779_pfc_device = {
	.name		= "pfc-r8a7779",
	.id		= -1,
	.resource	= r8a7779_pfc_resources,
	.num_resources	= ARRAY_SIZE(r8a7779_pfc_resources),
};

void __init r8a7779_pinmux_init(void)
{
	platform_device_register(&r8a7779_pfc_device);
}

static struct plat_sci_port scif0_platform_data = {
	.mapbase	= 0xffe40000,
	.flags		= UPF_BOOT_AUTOCONF | UPF_IOREMAP,
	.scscr		= SCSCR_RE | SCSCR_TE | SCSCR_CKE1,
	.scbrr_algo_id	= SCBRR_ALGO_2,
	.type		= PORT_SCIF,
	.irqs		= SCIx_IRQ_MUXED(gic_spi(88)),
};

static struct platform_device scif0_device = {
	.name		= "sh-sci",
	.id		= 0,
	.dev		= {
		.platform_data	= &scif0_platform_data,
	},
};

static struct plat_sci_port scif1_platform_data = {
	.mapbase	= 0xffe41000,
	.flags		= UPF_BOOT_AUTOCONF | UPF_IOREMAP,
	.scscr		= SCSCR_RE | SCSCR_TE | SCSCR_CKE1,
	.scbrr_algo_id	= SCBRR_ALGO_2,
	.type		= PORT_SCIF,
	.irqs		= SCIx_IRQ_MUXED(gic_spi(89)),
};

static struct platform_device scif1_device = {
	.name		= "sh-sci",
	.id		= 1,
	.dev		= {
		.platform_data	= &scif1_platform_data,
	},
};

static struct plat_sci_port scif2_platform_data = {
	.mapbase	= 0xffe42000,
	.flags		= UPF_BOOT_AUTOCONF | UPF_IOREMAP,
	.scscr		= SCSCR_RE | SCSCR_TE | SCSCR_CKE1,
	.scbrr_algo_id	= SCBRR_ALGO_2,
	.type		= PORT_SCIF,
	.irqs		= SCIx_IRQ_MUXED(gic_spi(90)),
};

static struct platform_device scif2_device = {
	.name		= "sh-sci",
	.id		= 2,
	.dev		= {
		.platform_data	= &scif2_platform_data,
	},
};

static struct plat_sci_port scif3_platform_data = {
	.mapbase	= 0xffe43000,
	.flags		= UPF_BOOT_AUTOCONF | UPF_IOREMAP,
	.scscr		= SCSCR_RE | SCSCR_TE | SCSCR_CKE1,
	.scbrr_algo_id	= SCBRR_ALGO_2,
	.type		= PORT_SCIF,
	.irqs		= SCIx_IRQ_MUXED(gic_spi(91)),
};

static struct platform_device scif3_device = {
	.name		= "sh-sci",
	.id		= 3,
	.dev		= {
		.platform_data	= &scif3_platform_data,
	},
};

static struct plat_sci_port scif4_platform_data = {
	.mapbase	= 0xffe44000,
	.flags		= UPF_BOOT_AUTOCONF | UPF_IOREMAP,
	.scscr		= SCSCR_RE | SCSCR_TE | SCSCR_CKE1,
	.scbrr_algo_id	= SCBRR_ALGO_2,
	.type		= PORT_SCIF,
	.irqs		= SCIx_IRQ_MUXED(gic_spi(92)),
};

static struct platform_device scif4_device = {
	.name		= "sh-sci",
	.id		= 4,
	.dev		= {
		.platform_data	= &scif4_platform_data,
	},
};

static struct plat_sci_port scif5_platform_data = {
	.mapbase	= 0xffe45000,
	.flags		= UPF_BOOT_AUTOCONF | UPF_IOREMAP,
	.scscr		= SCSCR_RE | SCSCR_TE | SCSCR_CKE1,
	.scbrr_algo_id	= SCBRR_ALGO_2,
	.type		= PORT_SCIF,
	.irqs		= SCIx_IRQ_MUXED(gic_spi(93)),
};

static struct platform_device scif5_device = {
	.name		= "sh-sci",
	.id		= 5,
	.dev		= {
		.platform_data	= &scif5_platform_data,
	},
};

/* TMU */
static struct sh_timer_config tmu00_platform_data = {
	.name = "TMU00",
	.channel_offset = 0x4,
	.timer_bit = 0,
	.clockevent_rating = 200,
};

static struct resource tmu00_resources[] = {
	[0] = {
		.name	= "TMU00",
		.start	= 0xffd80008,
		.end	= 0xffd80013,
		.flags	= IORESOURCE_MEM,
	},
	[1] = {
		.start	= gic_spi(32),
		.flags	= IORESOURCE_IRQ,
	},
};

static struct platform_device tmu00_device = {
	.name		= "sh_tmu",
	.id		= 0,
	.dev = {
		.platform_data	= &tmu00_platform_data,
	},
	.resource	= tmu00_resources,
	.num_resources	= ARRAY_SIZE(tmu00_resources),
};

static struct sh_timer_config tmu01_platform_data = {
	.name = "TMU01",
	.channel_offset = 0x10,
	.timer_bit = 1,
	.clocksource_rating = 200,
};

static struct resource tmu01_resources[] = {
	[0] = {
		.name	= "TMU01",
		.start	= 0xffd80014,
		.end	= 0xffd8001f,
		.flags	= IORESOURCE_MEM,
	},
	[1] = {
		.start	= gic_spi(33),
		.flags	= IORESOURCE_IRQ,
	},
};

static struct platform_device tmu01_device = {
	.name		= "sh_tmu",
	.id		= 1,
	.dev = {
		.platform_data	= &tmu01_platform_data,
	},
	.resource	= tmu01_resources,
	.num_resources	= ARRAY_SIZE(tmu01_resources),
};

/* I2C */
static struct resource rcar_i2c0_res[] = {
	{
		.start  = 0xffc70000,
		.end    = 0xffc70fff,
		.flags  = IORESOURCE_MEM,
	}, {
		.start  = gic_spi(79),
		.flags  = IORESOURCE_IRQ,
	},
};

static struct platform_device i2c0_device = {
	.name		= "i2c-rcar",
	.id		= 0,
	.resource	= rcar_i2c0_res,
	.num_resources	= ARRAY_SIZE(rcar_i2c0_res),
};

static struct resource rcar_i2c1_res[] = {
	{
		.start  = 0xffc71000,
		.end    = 0xffc71fff,
		.flags  = IORESOURCE_MEM,
	}, {
		.start  = gic_spi(82),
		.flags  = IORESOURCE_IRQ,
	},
};

static struct platform_device i2c1_device = {
	.name		= "i2c-rcar",
	.id		= 1,
	.resource	= rcar_i2c1_res,
	.num_resources	= ARRAY_SIZE(rcar_i2c1_res),
};

static struct resource rcar_i2c2_res[] = {
	{
		.start  = 0xffc72000,
		.end    = 0xffc72fff,
		.flags  = IORESOURCE_MEM,
	}, {
		.start  = gic_spi(80),
		.flags  = IORESOURCE_IRQ,
	},
};

static struct platform_device i2c2_device = {
	.name		= "i2c-rcar",
	.id		= 2,
	.resource	= rcar_i2c2_res,
	.num_resources	= ARRAY_SIZE(rcar_i2c2_res),
};

static struct resource rcar_i2c3_res[] = {
	{
		.start  = 0xffc73000,
		.end    = 0xffc73fff,
		.flags  = IORESOURCE_MEM,
	}, {
		.start  = gic_spi(81),
		.flags  = IORESOURCE_IRQ,
	},
};

static struct platform_device i2c3_device = {
	.name		= "i2c-rcar",
	.id		= 3,
	.resource	= rcar_i2c3_res,
	.num_resources	= ARRAY_SIZE(rcar_i2c3_res),
};

static struct platform_device *r8a7779_early_devices_dt[] __initdata = {
	&scif0_device,
	&scif1_device,
	&scif2_device,
	&scif3_device,
	&scif4_device,
	&scif5_device,
	&tmu00_device,
	&tmu01_device,
};

static struct platform_device *r8a7779_early_devices[] __initdata = {
	&i2c0_device,
	&i2c1_device,
	&i2c2_device,
	&i2c3_device,
};

void __init r8a7779_add_standard_devices(void)
{
#ifdef CONFIG_CACHE_L2X0
	/* Early BRESP enable, Shared attribute override enable, 64K*16way */
	l2x0_init(IOMEM(0xf0100000), 0x40470000, 0x82000fff);
#endif
	r8a7779_pm_init();

	r8a7779_init_pm_domains();

	platform_add_devices(r8a7779_early_devices_dt,
			    ARRAY_SIZE(r8a7779_early_devices_dt));
	platform_add_devices(r8a7779_early_devices,
			    ARRAY_SIZE(r8a7779_early_devices));
}

/* do nothing for !CONFIG_SMP or !CONFIG_HAVE_TWD */
void __init __weak r8a7779_register_twd(void) { }

void __init r8a7779_earlytimer_init(void)
{
	r8a7779_clock_init();
	shmobile_earlytimer_init();
	r8a7779_register_twd();
}

void __init r8a7779_add_early_devices(void)
{
	early_platform_add_devices(r8a7779_early_devices_dt,
				   ARRAY_SIZE(r8a7779_early_devices_dt));
	early_platform_add_devices(r8a7779_early_devices,
				   ARRAY_SIZE(r8a7779_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 in case of the marzen board.
	 */
}

#ifdef CONFIG_USE_OF
void __init r8a7779_add_early_devices_dt(void)
{
	shmobile_setup_delay(1000, 2, 4); /* Cortex-A9 @ 1000MHz */

	early_platform_add_devices(r8a7779_early_devices_dt,
				   ARRAY_SIZE(r8a7779_early_devices_dt));

	/* Early serial console setup is not included here.
	 * See comment in r8a7779_add_early_devices().
	 */
}

static const struct of_dev_auxdata r8a7779_auxdata_lookup[] __initconst = {
	{},
};

void __init r8a7779_add_standard_devices_dt(void)
{
	/* clocks are setup late during boot in the case of DT */
	r8a7779_clock_init();

	platform_add_devices(r8a7779_early_devices_dt,
			    ARRAY_SIZE(r8a7779_early_devices_dt));
	of_platform_populate(NULL, of_default_bus_match_table,
			     r8a7779_auxdata_lookup, NULL);
}

static const char *r8a7779_compat_dt[] __initdata = {
	"renesas,r8a7779",
	NULL,
};

DT_MACHINE_START(SH73A0_DT, "Generic R8A7779 (Flattened Device Tree)")
	.map_io		= r8a7779_map_io,
	.init_early	= r8a7779_add_early_devices_dt,
	.nr_irqs	= NR_IRQS_LEGACY,
	.init_irq	= r8a7779_init_irq_dt,
	.init_machine	= r8a7779_add_standard_devices_dt,
	.init_time	= shmobile_timer_init,
	.dt_compat	= r8a7779_compat_dt,
MACHINE_END
#endif /* CONFIG_USE_OF */