/*
 * Copyright (C) ST-Ericsson SA 2010
 *
 * Author: Rabin Vincent <rabin.vincent@stericsson.com> for ST-Ericsson
 * License terms: GNU General Public License (GPL) version 2
 */

#include <linux/platform_device.h>
#include <linux/amba/bus.h>
#include <linux/io.h>
#include <linux/irq.h>
#include <linux/gpio/nomadik.h>

#include <asm/pmu.h>
#include <asm/mach/map.h>
#include <asm/cacheflush.h>
#include <asm/tlbflush.h>

#include <linux/gpio.h>

#include <mach/hardware.h>
#include <mach/devices.h>
#include <mach/setup.h>
#include <mach/irqs.h>
#include <mach/usb.h>
#include <mach/ste-dma40-db5500.h>

#include "devices-db5500.h"

static struct map_desc u5500_uart_io_desc[] __initdata = {
	__IO_DEV_DESC(U5500_UART0_BASE, SZ_4K),
	__IO_DEV_DESC(U5500_UART2_BASE, SZ_4K),
};

static struct map_desc u5500_io_desc[] __initdata = {
	/* SCU base also covers GIC CPU BASE and TWD with its 4K page */
	__IO_DEV_DESC(U5500_SCU_BASE, SZ_4K),
	__IO_DEV_DESC(U5500_GIC_DIST_BASE, SZ_4K),
	__IO_DEV_DESC(U5500_L2CC_BASE, SZ_4K),
	__IO_DEV_DESC(U5500_MTU0_BASE, SZ_4K),
	__IO_DEV_DESC(U5500_MTU1_BASE, SZ_4K),
	__IO_DEV_DESC(U5500_RTC_BASE, SZ_4K),
	__IO_DEV_DESC(U5500_MTIMER_BASE, SZ_4K),
	__IO_DEV_DESC(U5500_BACKUPRAM0_BASE, SZ_8K),

	/* Map U5500_PUBLIC_BOOT_ROM_BASE (base+18000) only
	 * for TEE security driver
	 * and avoid overlap with asic ID at base+1D000 */
	__MEM_DEV_DESC(U5500_BOOT_ROM_BASE+0x18000, 6*SZ_4K),

	__IO_DEV_DESC(U5500_GPIO0_BASE, SZ_4K),
	__IO_DEV_DESC(U5500_GPIO1_BASE, SZ_4K),
	__IO_DEV_DESC(U5500_GPIO2_BASE, SZ_4K),
	__IO_DEV_DESC(U5500_GPIO3_BASE, SZ_4K),
	__IO_DEV_DESC(U5500_GPIO4_BASE, SZ_4K),
	__IO_DEV_DESC(U5500_PRCMU_BASE, SZ_4K),
	__IO_DEV_DESC(U5500_PRCMU_TCDM_BASE, SZ_4K),
	__IO_DEV_DESC(U5500_CLKRST1_BASE, SZ_4K),
	__IO_DEV_DESC(U5500_CLKRST2_BASE, SZ_4K),
	__IO_DEV_DESC(U5500_CLKRST3_BASE, SZ_4K),
	__IO_DEV_DESC(U5500_CLKRST5_BASE, SZ_4K),
	__IO_DEV_DESC(U5500_CLKRST6_BASE, SZ_4K),
};

static struct resource mbox0_resources[] = {
	{
		.name = "mbox_peer",
		.start = U5500_MBOX0_PEER_START,
		.end = U5500_MBOX0_PEER_END,
		.flags = IORESOURCE_MEM,
	},
	{
		.name = "mbox_local",
		.start = U5500_MBOX0_LOCAL_START,
		.end = U5500_MBOX0_LOCAL_END,
		.flags = IORESOURCE_MEM,
	},
	{
		.name = "mbox_irq",
		.start = MBOX_PAIR0_VIRT_IRQ,
		.end = MBOX_PAIR0_VIRT_IRQ,
		.flags = IORESOURCE_IRQ,
	}
};

static struct resource mbox1_resources[] = {
	{
		.name = "mbox_peer",
		.start = U5500_MBOX1_PEER_START,
		.end = U5500_MBOX1_PEER_END,
		.flags = IORESOURCE_MEM,
	},
	{
		.name = "mbox_local",
		.start = U5500_MBOX1_LOCAL_START,
		.end = U5500_MBOX1_LOCAL_END,
		.flags = IORESOURCE_MEM,
	},
	{
		.name = "mbox_irq",
		.start = MBOX_PAIR1_VIRT_IRQ,
		.end = MBOX_PAIR1_VIRT_IRQ,
		.flags = IORESOURCE_IRQ,
	}
};

static struct resource mbox2_resources[] = {
	{
		.name = "mbox_peer",
		.start = U5500_MBOX2_PEER_START,
		.end = U5500_MBOX2_PEER_END,
		.flags = IORESOURCE_MEM,
	},
	{
		.name = "mbox_local",
		.start = U5500_MBOX2_LOCAL_START,
		.end = U5500_MBOX2_LOCAL_END,
		.flags = IORESOURCE_MEM,
	},
	{
		.name = "mbox_irq",
		.start = MBOX_PAIR2_VIRT_IRQ,
		.end = MBOX_PAIR2_VIRT_IRQ,
		.flags = IORESOURCE_IRQ,
	}
};

static struct platform_device mbox0_device = {
	.id = 0,
	.name = "mbox",
	.resource = mbox0_resources,
	.num_resources = ARRAY_SIZE(mbox0_resources),
};

static struct platform_device mbox1_device = {
	.id = 1,
	.name = "mbox",
	.resource = mbox1_resources,
	.num_resources = ARRAY_SIZE(mbox1_resources),
};

static struct platform_device mbox2_device = {
	.id = 2,
	.name = "mbox",
	.resource = mbox2_resources,
	.num_resources = ARRAY_SIZE(mbox2_resources),
};

static struct platform_device db5500_prcmu_device = {
	.name			= "db5500-prcmu",
};

static struct platform_device *db5500_platform_devs[] __initdata = {
	&u5500_gpio_devs[0],
	&u5500_gpio_devs[1],
	&u5500_gpio_devs[2],
	&u5500_gpio_devs[3],
	&u5500_gpio_devs[4],
	&u5500_gpio_devs[5],
	&u5500_gpio_devs[6],
	&u5500_gpio_devs[7],
	&mbox0_device,
	&mbox1_device,
	&mbox2_device,
	&db5500_prcmu_device,
	&u5500_wdt_device,
};

static u8 db5500_revision;

bool cpu_is_u5500v1()
{
	return db5500_revision == 0xA0;
}

bool cpu_is_u5500v2()
{
	return (db5500_revision & 0xf0) == 0xB0;
}

bool cpu_is_u5500v20()
{
	return db5500_revision == 0xB0;
}

bool cpu_is_u5500v21()
{
	return db5500_revision == 0xB1;
}

static void db5500_rev_init(void)
{
	unsigned int asicid;

	/* As in devicemaps_init() */
	local_flush_tlb_all();
	flush_cache_all();

	asicid = readl_relaxed(__io_address(U5500_ASIC_ID_ADDRESS));
	db5500_revision = asicid & 0xff;
}

void __init u5500_map_io(void)
{
	/*
	 * Map the UARTs early so that the DEBUG_LL stuff continues to work.
	 */
	iotable_init(u5500_uart_io_desc, ARRAY_SIZE(u5500_uart_io_desc));

	ux500_map_io();

	iotable_init(u5500_io_desc, ARRAY_SIZE(u5500_io_desc));

	_PRCMU_BASE = __io_address(U5500_PRCMU_BASE);

	db5500_rev_init();
}

static void __init db5500_pmu_init(void)
{
	struct resource res[] = {
		[0] = {
			.start		= IRQ_DB5500_PMU0,
			.end		= IRQ_DB5500_PMU0,
			.flags		= IORESOURCE_IRQ,
		},
		[1] = {
			.start		= IRQ_DB5500_PMU1,
			.end		= IRQ_DB5500_PMU1,
			.flags		= IORESOURCE_IRQ,
		},
	};

	platform_device_register_simple("arm-pmu", ARM_PMU_DEVICE_CPU,
					res, ARRAY_SIZE(res));
}

static int usb_db5500_rx_dma_cfg[] = {
	DB5500_DMA_DEV4_USB_OTG_IEP_1_9,
	DB5500_DMA_DEV5_USB_OTG_IEP_2_10,
	DB5500_DMA_DEV6_USB_OTG_IEP_3_11,
	DB5500_DMA_DEV20_USB_OTG_IEP_4_12,
	DB5500_DMA_DEV21_USB_OTG_IEP_5_13,
	DB5500_DMA_DEV22_USB_OTG_IEP_6_14,
	DB5500_DMA_DEV23_USB_OTG_IEP_7_15,
	DB5500_DMA_DEV38_USB_OTG_IEP_8
};

static int usb_db5500_tx_dma_cfg[] = {
	DB5500_DMA_DEV4_USB_OTG_OEP_1_9,
	DB5500_DMA_DEV5_USB_OTG_OEP_2_10,
	DB5500_DMA_DEV6_USB_OTG_OEP_3_11,
	DB5500_DMA_DEV20_USB_OTG_OEP_4_12,
	DB5500_DMA_DEV21_USB_OTG_OEP_5_13,
	DB5500_DMA_DEV22_USB_OTG_OEP_6_14,
	DB5500_DMA_DEV23_USB_OTG_OEP_7_15,
	DB5500_DMA_DEV38_USB_OTG_OEP_8
};

void __init u5500_init_devices(void)
{
#ifdef CONFIG_STM_TRACE
	/* Early init for STM tracing */
	/* platform_device_register(&u5500_stm_device); */
#endif
	db5500_pmu_init();
	db5500_dma_init();
	db5500_add_rtc();
	db5500_add_usb(usb_db5500_rx_dma_cfg, usb_db5500_tx_dma_cfg);

	platform_add_devices(db5500_platform_devs,
			     ARRAY_SIZE(db5500_platform_devs));
}