/*
 *  linux/arch/arm/mach-realview/realview_pb1176.c
 *
 *  Copyright (C) 2008 ARM Limited
 *  Copyright (C) 2000 Deep Blue Solutions Ltd
 *
 * 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
 */

#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/device.h>
#include <linux/amba/bus.h>
#include <linux/amba/pl061.h>
#include <linux/amba/mmci.h>
#include <linux/amba/pl022.h>
#include <linux/mtd/physmap.h>
#include <linux/mtd/partitions.h>
#include <linux/io.h>
#include <linux/irqchip/arm-gic.h>
#include <linux/platform_data/clk-realview.h>
#include <linux/reboot.h>

#include <mach/hardware.h>
#include <asm/irq.h>
#include <asm/mach-types.h>
#include <asm/pgtable.h>
#include <asm/hardware/cache-l2x0.h>

#include <asm/mach/arch.h>
#include <asm/mach/flash.h>
#include <asm/mach/map.h>
#include <asm/mach/time.h>

#include <mach/board-pb1176.h>
#include <mach/irqs.h>

#include "core.h"

static struct map_desc realview_pb1176_io_desc[] __initdata = {
	{
		.virtual	= IO_ADDRESS(REALVIEW_SYS_BASE),
		.pfn		= __phys_to_pfn(REALVIEW_SYS_BASE),
		.length		= SZ_4K,
		.type		= MT_DEVICE,
	}, {
		.virtual	= IO_ADDRESS(REALVIEW_PB1176_GIC_CPU_BASE),
		.pfn		= __phys_to_pfn(REALVIEW_PB1176_GIC_CPU_BASE),
		.length		= SZ_4K,
		.type		= MT_DEVICE,
	}, {
		.virtual	= IO_ADDRESS(REALVIEW_PB1176_GIC_DIST_BASE),
		.pfn		= __phys_to_pfn(REALVIEW_PB1176_GIC_DIST_BASE),
		.length		= SZ_4K,
		.type		= MT_DEVICE,
	}, {
		.virtual	= IO_ADDRESS(REALVIEW_DC1176_GIC_CPU_BASE),
		.pfn		= __phys_to_pfn(REALVIEW_DC1176_GIC_CPU_BASE),
		.length		= SZ_4K,
		.type		= MT_DEVICE,
	}, {
		.virtual	= IO_ADDRESS(REALVIEW_DC1176_GIC_DIST_BASE),
		.pfn		= __phys_to_pfn(REALVIEW_DC1176_GIC_DIST_BASE),
		.length		= SZ_4K,
		.type		= MT_DEVICE,
	}, {
		.virtual	= IO_ADDRESS(REALVIEW_SCTL_BASE),
		.pfn		= __phys_to_pfn(REALVIEW_SCTL_BASE),
		.length		= SZ_4K,
		.type		= MT_DEVICE,
	}, {
		.virtual	= IO_ADDRESS(REALVIEW_PB1176_TIMER0_1_BASE),
		.pfn		= __phys_to_pfn(REALVIEW_PB1176_TIMER0_1_BASE),
		.length		= SZ_4K,
		.type		= MT_DEVICE,
	}, {
		.virtual	= IO_ADDRESS(REALVIEW_PB1176_TIMER2_3_BASE),
		.pfn		= __phys_to_pfn(REALVIEW_PB1176_TIMER2_3_BASE),
		.length		= SZ_4K,
		.type		= MT_DEVICE,
	}, {
		.virtual	= IO_ADDRESS(REALVIEW_PB1176_L220_BASE),
		.pfn		= __phys_to_pfn(REALVIEW_PB1176_L220_BASE),
		.length		= SZ_8K,
		.type		= MT_DEVICE,
	},
#ifdef CONFIG_DEBUG_LL
	{
		.virtual	= IO_ADDRESS(REALVIEW_PB1176_UART0_BASE),
		.pfn		= __phys_to_pfn(REALVIEW_PB1176_UART0_BASE),
		.length		= SZ_4K,
		.type		= MT_DEVICE,
	},
#endif
};

static void __init realview_pb1176_map_io(void)
{
	iotable_init(realview_pb1176_io_desc, ARRAY_SIZE(realview_pb1176_io_desc));
}

static struct pl061_platform_data gpio0_plat_data = {
	.gpio_base	= 0,
};

static struct pl061_platform_data gpio1_plat_data = {
	.gpio_base	= 8,
};

static struct pl061_platform_data gpio2_plat_data = {
	.gpio_base	= 16,
};

static struct pl022_ssp_controller ssp0_plat_data = {
	.bus_id = 0,
	.enable_dma = 0,
	.num_chipselect = 1,
};

/*
 * RealView PB1176 AMBA devices
 */
#define GPIO2_IRQ	{ IRQ_PB1176_GPIO2 }
#define GPIO3_IRQ	{ IRQ_PB1176_GPIO3 }
#define AACI_IRQ	{ IRQ_PB1176_AACI }
#define MMCI0_IRQ	{ IRQ_PB1176_MMCI0A, IRQ_PB1176_MMCI0B }
#define KMI0_IRQ	{ IRQ_PB1176_KMI0 }
#define KMI1_IRQ	{ IRQ_PB1176_KMI1 }
#define PB1176_SMC_IRQ	{ }
#define MPMC_IRQ	{ }
#define PB1176_CLCD_IRQ	{ IRQ_DC1176_CLCD }
#define SCTL_IRQ	{ }
#define PB1176_WATCHDOG_IRQ	{ IRQ_DC1176_WATCHDOG }
#define PB1176_GPIO0_IRQ	{ IRQ_DC1176_GPIO0 }
#define GPIO1_IRQ	{ IRQ_PB1176_GPIO1 }
#define PB1176_RTC_IRQ	{ IRQ_DC1176_RTC }
#define SCI_IRQ		{ IRQ_PB1176_SCI }
#define PB1176_UART0_IRQ	{ IRQ_DC1176_UART0 }
#define PB1176_UART1_IRQ	{ IRQ_DC1176_UART1 }
#define PB1176_UART2_IRQ	{ IRQ_DC1176_UART2 }
#define PB1176_UART3_IRQ	{ IRQ_DC1176_UART3 }
#define PB1176_UART4_IRQ	{ IRQ_PB1176_UART4 }
#define PB1176_SSP_IRQ		{ IRQ_DC1176_SSP }

/* FPGA Primecells */
APB_DEVICE(aaci,	"fpga:aaci",	AACI,		NULL);
APB_DEVICE(mmc0,	"fpga:mmc0",	MMCI0,		&realview_mmc0_plat_data);
APB_DEVICE(kmi0,	"fpga:kmi0",	KMI0,		NULL);
APB_DEVICE(kmi1,	"fpga:kmi1",	KMI1,		NULL);
APB_DEVICE(uart4,	"fpga:uart4",	PB1176_UART4,	NULL);

/* DevChip Primecells */
AHB_DEVICE(smc,		"dev:smc",	PB1176_SMC,	NULL);
AHB_DEVICE(sctl,	"dev:sctl",	SCTL,		NULL);
APB_DEVICE(wdog,	"dev:wdog",	PB1176_WATCHDOG,	NULL);
APB_DEVICE(gpio0,	"dev:gpio0",	PB1176_GPIO0,	&gpio0_plat_data);
APB_DEVICE(gpio1,	"dev:gpio1",	GPIO1,		&gpio1_plat_data);
APB_DEVICE(gpio2,	"dev:gpio2",	GPIO2,		&gpio2_plat_data);
APB_DEVICE(rtc,		"dev:rtc",	PB1176_RTC,	NULL);
APB_DEVICE(sci0,	"dev:sci0",	SCI,		NULL);
APB_DEVICE(uart0,	"dev:uart0",	PB1176_UART0,	NULL);
APB_DEVICE(uart1,	"dev:uart1",	PB1176_UART1,	NULL);
APB_DEVICE(uart2,	"dev:uart2",	PB1176_UART2,	NULL);
APB_DEVICE(uart3,	"dev:uart3",	PB1176_UART3,	NULL);
APB_DEVICE(ssp0,	"dev:ssp0",	PB1176_SSP,	&ssp0_plat_data);
AHB_DEVICE(clcd,	"dev:clcd",	PB1176_CLCD,	&clcd_plat_data);

static struct amba_device *amba_devs[] __initdata = {
	&uart0_device,
	&uart1_device,
	&uart2_device,
	&uart3_device,
	&uart4_device,
	&smc_device,
	&clcd_device,
	&sctl_device,
	&wdog_device,
	&gpio0_device,
	&gpio1_device,
	&gpio2_device,
	&rtc_device,
	&sci0_device,
	&ssp0_device,
	&aaci_device,
	&mmc0_device,
	&kmi0_device,
	&kmi1_device,
};

/*
 * RealView PB1176 platform devices
 */
static struct resource realview_pb1176_flash_resources[] = {
	{
		.start		= REALVIEW_PB1176_FLASH_BASE,
		.end		= REALVIEW_PB1176_FLASH_BASE + REALVIEW_PB1176_FLASH_SIZE - 1,
		.flags		= IORESOURCE_MEM,
	},
#ifdef CONFIG_REALVIEW_PB1176_SECURE_FLASH
	{
		.start		= REALVIEW_PB1176_SEC_FLASH_BASE,
		.end		= REALVIEW_PB1176_SEC_FLASH_BASE + REALVIEW_PB1176_SEC_FLASH_SIZE - 1,
		.flags		= IORESOURCE_MEM,
	},
#endif
};

static struct physmap_flash_data pb1176_rom_pdata = {
	.probe_type	= "map_rom",
	.width		= 4,
	.nr_parts	= 0,
};

static struct resource pb1176_rom_resources[] = {
	/*
	 * This exposes the PB1176 DevChip ROM as an MTD ROM mapping.
	 * The reference manual states that this is actually a pseudo-ROM
	 * programmed in NVRAM.
	 */
	{
		.start		= REALVIEW_DC1176_ROM_BASE,
		.end		= REALVIEW_DC1176_ROM_BASE + SZ_16K - 1,
		.flags		= IORESOURCE_MEM,
	}
};

static struct platform_device pb1176_rom_device = {
	.name		= "physmap-flash",
	.id		= -1,
	.num_resources	= ARRAY_SIZE(pb1176_rom_resources),
	.resource	= pb1176_rom_resources,
	.dev = {
		.platform_data = &pb1176_rom_pdata,
	},
};

static struct resource realview_pb1176_smsc911x_resources[] = {
	[0] = {
		.start		= REALVIEW_PB1176_ETH_BASE,
		.end		= REALVIEW_PB1176_ETH_BASE + SZ_64K - 1,
		.flags		= IORESOURCE_MEM,
	},
	[1] = {
		.start		= IRQ_PB1176_ETH,
		.end		= IRQ_PB1176_ETH,
		.flags		= IORESOURCE_IRQ,
	},
};

static struct resource realview_pb1176_isp1761_resources[] = {
	[0] = {
		.start		= REALVIEW_PB1176_USB_BASE,
		.end		= REALVIEW_PB1176_USB_BASE + SZ_128K - 1,
		.flags		= IORESOURCE_MEM,
	},
	[1] = {
		.start		= IRQ_PB1176_USB,
		.end		= IRQ_PB1176_USB,
		.flags		= IORESOURCE_IRQ,
	},
};

static struct resource pmu_resource = {
	.start		= IRQ_DC1176_CORE_PMU,
	.end		= IRQ_DC1176_CORE_PMU,
	.flags		= IORESOURCE_IRQ,
};

static struct platform_device pmu_device = {
	.name			= "arm-pmu",
	.id			= -1,
	.num_resources		= 1,
	.resource		= &pmu_resource,
};

static struct resource char_lcd_resources[] = {
	{
		.start = REALVIEW_CHAR_LCD_BASE,
		.end   = (REALVIEW_CHAR_LCD_BASE + SZ_4K - 1),
		.flags = IORESOURCE_MEM,
	},
	{
		.start	= IRQ_PB1176_CHARLCD,
		.end	= IRQ_PB1176_CHARLCD,
		.flags	= IORESOURCE_IRQ,
	},
};

static struct platform_device char_lcd_device = {
	.name		=	"arm-charlcd",
	.id		=	-1,
	.num_resources	=	ARRAY_SIZE(char_lcd_resources),
	.resource	=	char_lcd_resources,
};

static void __init gic_init_irq(void)
{
	/* ARM1176 DevChip GIC, primary */
	gic_init(0, IRQ_DC1176_GIC_START,
		 __io_address(REALVIEW_DC1176_GIC_DIST_BASE),
		 __io_address(REALVIEW_DC1176_GIC_CPU_BASE));

	/* board GIC, secondary */
	gic_init(1, IRQ_PB1176_GIC_START,
		 __io_address(REALVIEW_PB1176_GIC_DIST_BASE),
		 __io_address(REALVIEW_PB1176_GIC_CPU_BASE));
	gic_cascade_irq(1, IRQ_DC1176_PB_IRQ1);
}

static void __init realview_pb1176_timer_init(void)
{
	timer0_va_base = __io_address(REALVIEW_PB1176_TIMER0_1_BASE);
	timer1_va_base = __io_address(REALVIEW_PB1176_TIMER0_1_BASE) + 0x20;
	timer2_va_base = __io_address(REALVIEW_PB1176_TIMER2_3_BASE);
	timer3_va_base = __io_address(REALVIEW_PB1176_TIMER2_3_BASE) + 0x20;

	realview_clk_init(__io_address(REALVIEW_SYS_BASE), true);
	realview_timer_init(IRQ_DC1176_TIMER0);
}

static void realview_pb1176_restart(enum reboot_mode mode, const char *cmd)
{
	void __iomem *reset_ctrl = __io_address(REALVIEW_SYS_RESETCTL);
	void __iomem *lock_ctrl = __io_address(REALVIEW_SYS_LOCK);
	__raw_writel(REALVIEW_SYS_LOCK_VAL, lock_ctrl);
	__raw_writel(REALVIEW_PB1176_SYS_SOFT_RESET, reset_ctrl);
	dsb();
}

static void realview_pb1176_fixup(struct tag *tags, char **from,
				  struct meminfo *meminfo)
{
	/*
	 * RealView PB1176 only has 128MB of RAM mapped at 0.
	 */
	meminfo->bank[0].start = 0;
	meminfo->bank[0].size = SZ_128M;
	meminfo->nr_banks = 1;
}

static void __init realview_pb1176_init(void)
{
	int i;

#ifdef CONFIG_CACHE_L2X0
	/* 128Kb (16Kb/way) 8-way associativity. evmon/parity/share enabled. */
	l2x0_init(__io_address(REALVIEW_PB1176_L220_BASE), 0x00730000, 0xfe000fff);
#endif

	realview_flash_register(realview_pb1176_flash_resources,
				ARRAY_SIZE(realview_pb1176_flash_resources));
	platform_device_register(&pb1176_rom_device);
	realview_eth_register(NULL, realview_pb1176_smsc911x_resources);
	platform_device_register(&realview_i2c_device);
	realview_usb_register(realview_pb1176_isp1761_resources);
	platform_device_register(&pmu_device);
	platform_device_register(&char_lcd_device);

	for (i = 0; i < ARRAY_SIZE(amba_devs); i++) {
		struct amba_device *d = amba_devs[i];
		amba_device_register(d, &iomem_resource);
	}
}

MACHINE_START(REALVIEW_PB1176, "ARM-RealView PB1176")
	/* Maintainer: ARM Ltd/Deep Blue Solutions Ltd */
	.atag_offset	= 0x100,
	.fixup		= realview_pb1176_fixup,
	.map_io		= realview_pb1176_map_io,
	.init_early	= realview_init_early,
	.init_irq	= gic_init_irq,
	.init_time	= realview_pb1176_timer_init,
	.init_machine	= realview_pb1176_init,
#ifdef CONFIG_ZONE_DMA
	.dma_zone_size	= SZ_256M,
#endif
	.restart	= realview_pb1176_restart,
MACHINE_END