9cd11c0c47
Pull ARM soc multiplatform enablement from Olof Johansson:
"This is a pretty significant branch. It's the introduction of the
first multiplatform support on ARM, and with this (and the later
branch) merged, it is now possible to build one kernel that contains
support for highbank, vexpress, mvebu, socfpga, and picoxcell. More
platforms will be convered over in the next few releases.
Two critical last things had to be done for this to be practical and
possible:
* Today each platform has its own include directory under
mach-<mach>/include/mach/*, and traditionally that is where a lot
of driver/platform shared definitions have gone, such as platform
data structures. They now need to move out to a common location
instead, and this branch moves a large number of those out to
include/linux/platform_data.
* Each platform used to list the device trees to compile for its
boards in mach-<mach>/Makefile.boot.
Both of the above changes will mean that there are some merge
conflicts to come (and some to resolve here). It's a one-time move
and once it settles in, we should be good for quite a while. Sorry
for the overhead."
Fix conflicts as per Olof.
* tag 'multiplatform' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (51 commits)
ARM: add v7 multi-platform defconfig
ARM: msm: Move core.h contents into common.h
ARM: highbank: call highbank_pm_init from .init_machine
ARM: dtb: move all dtb targets to common Makefile
ARM: spear: move platform_data definitions
ARM: samsung: move platform_data definitions
ARM: orion: move platform_data definitions
ARM: vexpress: convert to multi-platform
ARM: initial multiplatform support
ARM: mvebu: move armada-370-xp.h in mach dir
ARM: vexpress: remove dependency on mach/* headers
ARM: picoxcell: remove dependency on mach/* headers
ARM: move all dtb targets out of Makefile.boot
ARM: picoxcell: move debug macros to include/debug
ARM: socfpga: move debug macros to include/debug
ARM: mvebu: move debug macros to include/debug
ARM: vexpress: move debug macros to include/debug
ARM: highbank: move debug macros to include/debug
ARM: move debug macros to common location
ARM: make mach/gpio.h headers optional
...
254 lines
6.6 KiB
C
254 lines
6.6 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 <asm/pmu.h>
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#include <asm/mach/map.h>
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#include <plat/gpio-nomadik.h>
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#include <mach/hardware.h>
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#include <mach/setup.h>
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#include <mach/devices.h>
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#include <linux/platform_data/usb-musb-ux500.h>
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#include <mach/db8500-regs.h>
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#include "devices-db8500.h"
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#include "ste-dma40-db8500.h"
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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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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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_PRCMU_BASE = __io_address(U8500_PRCMU_BASE);
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}
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static struct resource db8500_pmu_resources[] = {
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[0] = {
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.start = IRQ_DB8500_PMU,
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.end = IRQ_DB8500_PMU,
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.flags = IORESOURCE_IRQ,
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},
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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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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 struct platform_device db8500_pmu_device = {
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.name = "arm-pmu",
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.id = -1,
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.num_resources = ARRAY_SIZE(db8500_pmu_resources),
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.resource = db8500_pmu_resources,
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.dev.platform_data = &db8500_pmu_platdata,
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};
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static struct platform_device db8500_prcmu_device = {
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.name = "db8500-prcmu",
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};
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static struct platform_device *platform_devs[] __initdata = {
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&u8500_dma40_device,
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&db8500_pmu_device,
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&db8500_prcmu_device,
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};
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static resource_size_t __initdata db8500_gpio_base[] = {
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U8500_GPIOBANK0_BASE,
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U8500_GPIOBANK1_BASE,
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U8500_GPIOBANK2_BASE,
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U8500_GPIOBANK3_BASE,
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U8500_GPIOBANK4_BASE,
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U8500_GPIOBANK5_BASE,
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U8500_GPIOBANK6_BASE,
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U8500_GPIOBANK7_BASE,
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U8500_GPIOBANK8_BASE,
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};
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static void __init db8500_add_gpios(struct device *parent)
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{
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struct nmk_gpio_platform_data pdata = {
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.supports_sleepmode = true,
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};
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dbx500_add_gpios(parent, ARRAY_AND_SIZE(db8500_gpio_base),
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IRQ_DB8500_GPIO0, &pdata);
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dbx500_add_pinctrl(parent, "pinctrl-db8500");
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}
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static int usb_db8500_rx_dma_cfg[] = {
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DB8500_DMA_DEV38_USB_OTG_IEP_1_9,
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DB8500_DMA_DEV37_USB_OTG_IEP_2_10,
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DB8500_DMA_DEV36_USB_OTG_IEP_3_11,
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DB8500_DMA_DEV19_USB_OTG_IEP_4_12,
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DB8500_DMA_DEV18_USB_OTG_IEP_5_13,
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DB8500_DMA_DEV17_USB_OTG_IEP_6_14,
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DB8500_DMA_DEV16_USB_OTG_IEP_7_15,
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DB8500_DMA_DEV39_USB_OTG_IEP_8
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};
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static int usb_db8500_tx_dma_cfg[] = {
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DB8500_DMA_DEV38_USB_OTG_OEP_1_9,
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DB8500_DMA_DEV37_USB_OTG_OEP_2_10,
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DB8500_DMA_DEV36_USB_OTG_OEP_3_11,
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DB8500_DMA_DEV19_USB_OTG_OEP_4_12,
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DB8500_DMA_DEV18_USB_OTG_OEP_5_13,
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DB8500_DMA_DEV17_USB_OTG_OEP_6_14,
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DB8500_DMA_DEV16_USB_OTG_OEP_7_15,
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DB8500_DMA_DEV39_USB_OTG_OEP_8
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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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return kasprintf(GFP_KERNEL, "%08x%08x%08x%08x%08x",
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readl((u32 *)uid+1),
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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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/*
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* This function is called from the board init
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*/
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struct device * __init u8500_init_devices(struct ab8500_platform_data *ab8500)
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{
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struct device *parent;
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int i;
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parent = db8500_soc_device_init();
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db8500_add_rtc(parent);
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db8500_add_gpios(parent);
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db8500_add_usb(parent, usb_db8500_rx_dma_cfg, usb_db8500_tx_dma_cfg);
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platform_device_register_data(parent,
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"cpufreq-u8500", -1, NULL, 0);
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for (i = 0; i < ARRAY_SIZE(platform_devs); i++)
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platform_devs[i]->dev.parent = parent;
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db8500_prcmu_device.dev.platform_data = ab8500;
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platform_add_devices(platform_devs, ARRAY_SIZE(platform_devs));
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return parent;
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}
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/* TODO: Once all pieces are DT:ed, remove completely. */
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struct device * __init u8500_of_init_devices(void)
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{
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struct device *parent;
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parent = db8500_soc_device_init();
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db8500_add_usb(parent, usb_db8500_rx_dma_cfg, usb_db8500_tx_dma_cfg);
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platform_device_register_data(parent,
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"cpufreq-u8500", -1, NULL, 0);
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u8500_dma40_device.dev.parent = parent;
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/*
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* Devices to be DT:ed:
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* u8500_dma40_device = todo
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* db8500_pmu_device = done
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* db8500_prcmu_device = done
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*/
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platform_device_register(&u8500_dma40_device);
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return parent;
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}
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