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