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arch.c

/*****************************************************************************
* Copyright 2003 - 2008 Broadcom Corporation.  All rights reserved.
*
* Unless you and Broadcom execute a separate written software license
* agreement governing use of this software, this software is licensed to you
* under the terms of the GNU General Public License version 2, available at
* http://www.broadcom.com/licenses/GPLv2.php (the "GPL").
*
* Notwithstanding the above, under no circumstances may you combine this
* software in any way with any other Broadcom software provided under a
* license other than the GPL, without Broadcom's express prior written
* consent.
*****************************************************************************/

#include <linux/kernel.h>
#include <linux/platform_device.h>
#include <linux/types.h>
#include <linux/sched.h>
#include <linux/interrupt.h>
#include <linux/init.h>
#include <linux/errno.h>
#include <linux/spinlock.h>
#include <linux/module.h>

#include <linux/proc_fs.h>
#include <linux/sysctl.h>

#include <asm/irq.h>
#include <asm/setup.h>
#include <asm/mach-types.h>
#include <asm/mach/time.h>
#include <asm/pmu.h>

#include <asm/mach/arch.h>
#include <mach/dma.h>
#include <mach/hardware.h>
#include <mach/csp/mm_io.h>
#include <mach/csp/chipcHw_def.h>
#include <mach/csp/chipcHw_inline.h>

#include <cfg_global.h>

#include "core.h"

HW_DECLARE_SPINLOCK(arch)
HW_DECLARE_SPINLOCK(gpio)
#if defined(CONFIG_DEBUG_SPINLOCK)
    EXPORT_SYMBOL(bcmring_gpio_reg_lock);
#endif

/* sysctl */
int bcmring_arch_warm_reboot; /* do a warm reboot on hard reset */

static struct ctl_table_header *bcmring_sysctl_header;

static struct ctl_table bcmring_sysctl_warm_reboot[] = {
      {
       .procname = "warm",
       .data = &bcmring_arch_warm_reboot,
       .maxlen = sizeof(int),
       .mode = 0644,
       .proc_handler = proc_dointvec},
      {}
};

static struct ctl_table bcmring_sysctl_reboot[] = {
      {
       .procname = "reboot",
       .mode = 0555,
       .child = bcmring_sysctl_warm_reboot},
      {}
};

static struct resource nand_resource[] = {
      [0] = {
            .start = MM_ADDR_IO_NAND,
            .end = MM_ADDR_IO_NAND + 0x1000 - 1,
            .flags = IORESOURCE_MEM,
      },
};

static struct platform_device nand_device = {
      .name = "bcm-nand",
      .id = -1,
      .resource = nand_resource,
      .num_resources    = ARRAY_SIZE(nand_resource),
};

static struct resource pmu_resource = {
      .start      = IRQ_PMUIRQ,
      .end  = IRQ_PMUIRQ,
      .flags      = IORESOURCE_IRQ,
};

static struct platform_device pmu_device = {
      .name       = "arm-pmu",
      .id         = ARM_PMU_DEVICE_CPU,
      .resource   = &pmu_resource,
      .num_resources    = 1,
};


static struct platform_device *devices[] __initdata = {
      &nand_device,
      &pmu_device,
};

/****************************************************************************
*
*   Called from the customize_machine function in arch/arm/kernel/setup.c
*
*   The customize_machine function is tagged as an arch_initcall
*   (see include/linux/init.h for the order that the various init sections
*   are called in.
*
*****************************************************************************/
static void __init bcmring_init_machine(void)
{

      bcmring_sysctl_header = register_sysctl_table(bcmring_sysctl_reboot);

      /* Enable spread spectrum */
      chipcHw_enableSpreadSpectrum();

      platform_add_devices(devices, ARRAY_SIZE(devices));

      bcmring_amba_init();

      dma_init();
}

/****************************************************************************
*
*   Called from setup_arch (in arch/arm/kernel/setup.c) to fixup any tags
*   passed in by the boot loader.
*
*****************************************************************************/

static void __init bcmring_fixup(struct machine_desc *desc,
     struct tag *t, char **cmdline, struct meminfo *mi) {
#ifdef CONFIG_BLK_DEV_INITRD
      printk(KERN_NOTICE "bcmring_fixup\n");
      t->hdr.tag = ATAG_CORE;
      t->hdr.size = tag_size(tag_core);
      t->u.core.flags = 0;
      t->u.core.pagesize = PAGE_SIZE;
      t->u.core.rootdev = 31 << 8 | 0;
      t = tag_next(t);

      t->hdr.tag = ATAG_MEM;
      t->hdr.size = tag_size(tag_mem32);
      t->u.mem.start = CFG_GLOBAL_RAM_BASE;
      t->u.mem.size = CFG_GLOBAL_RAM_SIZE;

      t = tag_next(t);

      t->hdr.tag = ATAG_NONE;
      t->hdr.size = 0;
#endif
}

/****************************************************************************
*
*   Machine Description
*
*****************************************************************************/

MACHINE_START(BCMRING, "BCMRING")
      /* Maintainer: Broadcom Corporation */
      .fixup = bcmring_fixup,
      .map_io = bcmring_map_io,
      .init_irq = bcmring_init_irq,
      .timer = &bcmring_timer,
      .init_machine = bcmring_init_machine
MACHINE_END

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