/*
   * Copyright (C) 2008-2009 ST-Ericsson SA
   *
   * Author: Srinidhi KASAGAR <srinidhi.kasagar@stericsson.com>
   *
   * This program is free software; you can redistribute it and/or modify
   * it under the terms of the GNU General Public License version 2, as
   * published by the Free Software Foundation.
   *
   */
  #include <linux/types.h>
  #include <linux/init.h>
  #include <linux/device.h>
  #include <linux/amba/bus.h>
  #include <linux/interrupt.h>
  #include <linux/irq.h>
  #include <linux/platform_device.h>
  #include <linux/io.h>
  #include <linux/mfd/abx500/ab8500.h>
  #include <linux/mfd/dbx500-prcmu.h>
  #include <linux/of.h>
  #include <linux/of_platform.h>
  #include <linux/regulator/machine.h>
  #include <linux/random.h>
  
  #include <asm/pmu.h>
  #include <asm/mach/map.h>
  
  #include "setup.h"
  #include "irqs.h"
  
  #include "board-mop500-regulators.h"
  #include "board-mop500.h"
  #include "db8500-regs.h"
  #include "id.h"
  
  struct ab8500_platform_data ab8500_platdata = {
  	.irq_base	= MOP500_AB8500_IRQ_BASE,
  	.regulator	= &ab8500_regulator_plat_data,
  };
  
  struct prcmu_pdata db8500_prcmu_pdata = {
  	.ab_platdata	= &ab8500_platdata,
  	.ab_irq		= IRQ_DB8500_AB8500,
  	.irq_base	= IRQ_PRCMU_BASE,
  	.version_offset	= DB8500_PRCMU_FW_VERSION_OFFSET,
  	.legacy_offset	= DB8500_PRCMU_LEGACY_OFFSET,
  };
  
  /* minimum static i/o mapping required to boot U8500 platforms */
  static struct map_desc u8500_uart_io_desc[] __initdata = {
  	__IO_DEV_DESC(U8500_UART0_BASE, SZ_4K),
  	__IO_DEV_DESC(U8500_UART2_BASE, SZ_4K),
  };
  /*  U8500 and U9540 common io_desc */
  static struct map_desc u8500_common_io_desc[] __initdata = {
  	/* SCU base also covers GIC CPU BASE and TWD with its 4K page */
  	__IO_DEV_DESC(U8500_SCU_BASE, SZ_4K),
  	__IO_DEV_DESC(U8500_GIC_DIST_BASE, SZ_4K),
  	__IO_DEV_DESC(U8500_L2CC_BASE, SZ_4K),
  	__IO_DEV_DESC(U8500_MTU0_BASE, SZ_4K),
  	__IO_DEV_DESC(U8500_BACKUPRAM0_BASE, SZ_8K),
  
  	__IO_DEV_DESC(U8500_CLKRST1_BASE, SZ_4K),
  	__IO_DEV_DESC(U8500_CLKRST2_BASE, SZ_4K),
  	__IO_DEV_DESC(U8500_CLKRST3_BASE, SZ_4K),
  	__IO_DEV_DESC(U8500_CLKRST5_BASE, SZ_4K),
  	__IO_DEV_DESC(U8500_CLKRST6_BASE, SZ_4K),
  
  	__IO_DEV_DESC(U8500_GPIO0_BASE, SZ_4K),
  	__IO_DEV_DESC(U8500_GPIO1_BASE, SZ_4K),
  	__IO_DEV_DESC(U8500_GPIO2_BASE, SZ_4K),
  	__IO_DEV_DESC(U8500_GPIO3_BASE, SZ_4K),
  };
  
  /* U8500 IO map specific description */
  static struct map_desc u8500_io_desc[] __initdata = {
  	__IO_DEV_DESC(U8500_PRCMU_BASE, SZ_4K),
  	__IO_DEV_DESC(U8500_PRCMU_TCDM_BASE, SZ_4K),
  
  };
  
  /* U9540 IO map specific description */
  static struct map_desc u9540_io_desc[] __initdata = {
  	__IO_DEV_DESC(U8500_PRCMU_BASE, SZ_4K + SZ_8K),
  	__IO_DEV_DESC(U8500_PRCMU_TCDM_BASE, SZ_4K + SZ_8K),
  };
  
  void __init u8500_map_io(void)
  {
  	/*
  	 * Map the UARTs early so that the DEBUG_LL stuff continues to work.
  	 */
  	iotable_init(u8500_uart_io_desc, ARRAY_SIZE(u8500_uart_io_desc));
  
  	ux500_map_io();
  
  	iotable_init(u8500_common_io_desc, ARRAY_SIZE(u8500_common_io_desc));
  
  	if (cpu_is_ux540_family())
  		iotable_init(u9540_io_desc, ARRAY_SIZE(u9540_io_desc));
  	else
  		iotable_init(u8500_io_desc, ARRAY_SIZE(u8500_io_desc));
  }
  
  /*
   * The PMU IRQ lines of two cores are wired together into a single interrupt.
   * Bounce the interrupt to the other core if it's not ours.
   */
  static irqreturn_t db8500_pmu_handler(int irq, void *dev, irq_handler_t handler)
  {
  	irqreturn_t ret = handler(irq, dev);
  	int other = !smp_processor_id();
  
  	if (ret == IRQ_NONE && cpu_online(other))
  		irq_set_affinity(irq, cpumask_of(other));
  
  	/*
  	 * We should be able to get away with the amount of IRQ_NONEs we give,
  	 * while still having the spurious IRQ detection code kick in if the
  	 * interrupt really starts hitting spuriously.
  	 */
  	return ret;
  }
  
  struct arm_pmu_platdata db8500_pmu_platdata = {
  	.handle_irq		= db8500_pmu_handler,
  };
  
  static const char *db8500_read_soc_id(void)
  {
  	void __iomem *uid = __io_address(U8500_BB_UID_BASE);
  
  	/* Throw these device-specific numbers into the entropy pool */
  	add_device_randomness(uid, 0x14);
  	return kasprintf(GFP_KERNEL, "%08x%08x%08x%08x%08x",
  			 readl((u32 *)uid+0),
  			 readl((u32 *)uid+1), readl((u32 *)uid+2),
  			 readl((u32 *)uid+3), readl((u32 *)uid+4));
  }
  
  static struct device * __init db8500_soc_device_init(void)
  {
  	const char *soc_id = db8500_read_soc_id();
  
  	return ux500_soc_device_init(soc_id);
  }
  
  #ifdef CONFIG_MACH_UX500_DT
  static struct of_dev_auxdata u8500_auxdata_lookup[] __initdata = {
  	/* Requires call-back bindings. */
  	OF_DEV_AUXDATA("arm,cortex-a9-pmu", 0, "arm-pmu", &db8500_pmu_platdata),
  	/* Requires DMA bindings. */
  	OF_DEV_AUXDATA("arm,pl18x", 0x80126000, "sdi0",  &mop500_sdi0_data),
  	OF_DEV_AUXDATA("arm,pl18x", 0x80118000, "sdi1",  &mop500_sdi1_data),
  	OF_DEV_AUXDATA("arm,pl18x", 0x80005000, "sdi2",  &mop500_sdi2_data),
  	OF_DEV_AUXDATA("arm,pl18x", 0x80114000, "sdi4",  &mop500_sdi4_data),
  	OF_DEV_AUXDATA("stericsson,ux500-msp-i2s", 0x80123000,
  		       "ux500-msp-i2s.0", &msp0_platform_data),
  	OF_DEV_AUXDATA("stericsson,ux500-msp-i2s", 0x80124000,
  		       "ux500-msp-i2s.1", &msp1_platform_data),
  	OF_DEV_AUXDATA("stericsson,ux500-msp-i2s", 0x80117000,
  		       "ux500-msp-i2s.2", &msp2_platform_data),
  	OF_DEV_AUXDATA("stericsson,ux500-msp-i2s", 0x80125000,
  		       "ux500-msp-i2s.3", &msp3_platform_data),
  	/* Requires non-DT:able platform data. */
  	OF_DEV_AUXDATA("stericsson,db8500-prcmu", 0x80157000, "db8500-prcmu",
  			&db8500_prcmu_pdata),
  	OF_DEV_AUXDATA("stericsson,ux500-cryp", 0xa03cb000, "cryp1", NULL),
  	OF_DEV_AUXDATA("stericsson,ux500-hash", 0xa03c2000, "hash1", NULL),
  	OF_DEV_AUXDATA("stericsson,snd-soc-mop500", 0, "snd-soc-mop500.0",
  			NULL),
  	{},
  };
  
  static struct of_dev_auxdata u8540_auxdata_lookup[] __initdata = {
  	OF_DEV_AUXDATA("stericsson,db8500-prcmu", 0x80157000, "db8500-prcmu",
  			&db8500_prcmu_pdata),
  	{},
  };
  
  static const struct of_device_id u8500_local_bus_nodes[] = {
  	/* only create devices below soc node */
  	{ .compatible = "stericsson,db8500", },
  	{ .compatible = "stericsson,db8500-prcmu", },
  	{ .compatible = "simple-bus"},
  	{ },
  };
  
  static void __init u8500_init_machine(void)
  {
  	struct device *parent = db8500_soc_device_init();
  
  	/* Pinmaps must be in place before devices register */
  	if (of_machine_is_compatible("st-ericsson,mop500"))
  		mop500_pinmaps_init();
  	else if (of_machine_is_compatible("calaosystems,snowball-a9500")) {
  		snowball_pinmaps_init();
  	} else if (of_machine_is_compatible("st-ericsson,hrefv60+"))
  		hrefv60_pinmaps_init();
  	else if (of_machine_is_compatible("st-ericsson,ccu9540")) {}
  		/* TODO: Add pinmaps for ccu9540 board. */
  
  	/* automatically probe child nodes of dbx5x0 devices */
  	if (of_machine_is_compatible("st-ericsson,u8540"))
  		of_platform_populate(NULL, u8500_local_bus_nodes,
  				     u8540_auxdata_lookup, parent);
  	else
  		of_platform_populate(NULL, u8500_local_bus_nodes,
  				     u8500_auxdata_lookup, parent);
  }
  
  static const char * stericsson_dt_platform_compat[] = {
  	"st-ericsson,u8500",
  	"st-ericsson,u8540",
  	"st-ericsson,u9500",
  	"st-ericsson,u9540",
  	NULL,
  };
  
  DT_MACHINE_START(U8500_DT, "ST-Ericsson Ux5x0 platform (Device Tree Support)")
  	.smp            = smp_ops(ux500_smp_ops),
  	.map_io		= u8500_map_io,
  	.init_irq	= ux500_init_irq,
  	/* we re-use nomadik timer here */
  	.init_time	= ux500_timer_init,
  	.init_machine	= u8500_init_machine,
  	.init_late	= NULL,
  	.dt_compat      = stericsson_dt_platform_compat,
  	.restart        = ux500_restart,
  MACHINE_END
  
  #endif