arch/arm/mach-ux500/cpu-db8500.c - maze/linux - Git at Google

 /*
  * 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 "board-mop500-regulators.h"
 #include "board-mop500.h"
 #include "db8500-regs.h"
 #include "id.h"

 struct ab8500_platform_data ab8500_platdata = {
 	.regulator	= &ab8500_regulator_plat_data,
 };

 struct prcmu_pdata db8500_prcmu_pdata = {
 	.ab_platdata	= &ab8500_platdata,
 	.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);
 }

 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();

 	/* 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
	/*
	* 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 "board-mop500-regulators.h"
	#include "board-mop500.h"
	#include "db8500-regs.h"
	#include "id.h"

	struct ab8500_platform_data ab8500_platdata = {
	.regulator = &ab8500_regulator_plat_data,
	};

	struct prcmu_pdata db8500_prcmu_pdata = {
	.ab_platdata = &ab8500_platdata,
	.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);
	}

	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();

	/* 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