LXR linux/arch/arm/mach-bcmring/arch.c

   1/*****************************************************************************
   2* Copyright 2003 - 2008 Broadcom Corporation.  All rights reserved.
   3*
   4* Unless you and Broadcom execute a separate written software license
   5* agreement governing use of this software, this software is licensed to you
   6* under the terms of the GNU General Public License version 2, available at
   7* http://www.broadcom.com/licenses/GPLv2.php (the "GPL").
   8*
   9* Notwithstanding the above, under no circumstances may you combine this
  10* software in any way with any other Broadcom software provided under a
  11* license other than the GPL, without Broadcom's express prior written
  12* consent.
  13*****************************************************************************/
  14
  15#include <linux/kernel.h>
  16#include <linux/platform_device.h>
  17#include <linux/types.h>
  18#include <linux/sched.h>
  19#include <linux/interrupt.h>
  20#include <linux/init.h>
  21#include <linux/errno.h>
  22#include <linux/spinlock.h>
  23#include <linux/module.h>
  24
  25#include <linux/proc_fs.h>
  26#include <linux/sysctl.h>
  27
  28#include <asm/irq.h>
  29#include <asm/setup.h>
  30#include <asm/mach-types.h>
  31#include <asm/mach/time.h>
  32
  33#include <asm/mach/arch.h>
  34#include <mach/dma.h>
  35#include <mach/hardware.h>
  36#include <mach/csp/mm_io.h>
  37#include <mach/csp/chipcHw_def.h>
  38#include <mach/csp/chipcHw_inline.h>
  39
  40#include <cfg_global.h>
  41
  42#include "core.h"
  43
  44HW_DECLARE_SPINLOCK(arch)
  45HW_DECLARE_SPINLOCK(gpio)
  46#if defined(CONFIG_DEBUG_SPINLOCK)
  47    EXPORT_SYMBOL(bcmring_gpio_reg_lock);
  48#endif
  49
  50/* FIXME: temporary solution */
  51#define BCM_SYSCTL_REBOOT_WARM               1
  52#define CTL_BCM_REBOOT                 112
  53
  54/* sysctl */
  55int bcmring_arch_warm_reboot;   /* do a warm reboot on hard reset */
  56
  57static struct ctl_table_header *bcmring_sysctl_header;
  58
  59static struct ctl_table bcmring_sysctl_warm_reboot[] = {
  60        {
  61         .ctl_name = BCM_SYSCTL_REBOOT_WARM,
  62         .procname = "warm",
  63         .data = &bcmring_arch_warm_reboot,
  64         .maxlen = sizeof(int),
  65         .mode = 0644,
  66         .proc_handler = &proc_dointvec},
  67        {}
  68};
  69
  70static struct ctl_table bcmring_sysctl_reboot[] = {
  71        {
  72         .ctl_name = CTL_BCM_REBOOT,
  73         .procname = "reboot",
  74         .mode = 0555,
  75         .child = bcmring_sysctl_warm_reboot},
  76        {}
  77};
  78
  79static struct platform_device nand_device = {
  80        .name = "bcm-nand",
  81        .id = -1,
  82};
  83
  84static struct platform_device *devices[] __initdata = {
  85        &nand_device,
  86};
  87
  88/****************************************************************************
  89*
  90*   Called from the customize_machine function in arch/arm/kernel/setup.c
  91*
  92*   The customize_machine function is tagged as an arch_initcall
  93*   (see include/linux/init.h for the order that the various init sections
  94*   are called in.
  95*
  96*****************************************************************************/
  97static void __init bcmring_init_machine(void)
  98{
  99
 100        bcmring_sysctl_header = register_sysctl_table(bcmring_sysctl_reboot);
 101
 102        /* Enable spread spectrum */
 103        chipcHw_enableSpreadSpectrum();
 104
 105        platform_add_devices(devices, ARRAY_SIZE(devices));
 106
 107        bcmring_amba_init();
 108
 109        dma_init();
 110}
 111
 112/****************************************************************************
 113*
 114*   Called from setup_arch (in arch/arm/kernel/setup.c) to fixup any tags
 115*   passed in by the boot loader.
 116*
 117*****************************************************************************/
 118
 119static void __init bcmring_fixup(struct machine_desc *desc,
 120     struct tag *t, char **cmdline, struct meminfo *mi) {
 121#ifdef CONFIG_BLK_DEV_INITRD
 122        printk(KERN_NOTICE "bcmring_fixup\n");
 123        t->hdr.tag = ATAG_CORE;
 124        t->hdr.size = tag_size(tag_core);
 125        t->u.core.flags = 0;
 126        t->u.core.pagesize = PAGE_SIZE;
 127        t->u.core.rootdev = 31 << 8 | 0;
 128        t = tag_next(t);
 129
 130        t->hdr.tag = ATAG_MEM;
 131        t->hdr.size = tag_size(tag_mem32);
 132        t->u.mem.start = CFG_GLOBAL_RAM_BASE;
 133        t->u.mem.size = CFG_GLOBAL_RAM_SIZE;
 134
 135        t = tag_next(t);
 136
 137        t->hdr.tag = ATAG_NONE;
 138        t->hdr.size = 0;
 139#endif
 140}
 141
 142/****************************************************************************
 143*
 144*   Machine Description
 145*
 146*****************************************************************************/
 147
 148MACHINE_START(BCMRING, "BCMRING")
 149        /* Maintainer: Broadcom Corporation */
 150        .phys_io = MM_IO_START,
 151        .io_pg_offst = (MM_IO_BASE >> 18) & 0xfffc,
 152        .fixup = bcmring_fixup,
 153        .map_io = bcmring_map_io,
 154        .init_irq = bcmring_init_irq,
 155        .timer = &bcmring_timer,
 156        .init_machine = bcmring_init_machine
 157MACHINE_END
 158