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
  44 HW_DECLARE_SPINLOCK(arch)
  45 HW_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 */
  55 int bcmring_arch_warm_reboot;   /* do a warm reboot on hard reset */
  56
  57 static struct ctl_table_header *bcmring_sysctl_header;
  58
  59 static 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
  70 static 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
  79 static struct platform_device nand_device = {
  80         .name = "bcm-nand",
  81         .id = -1,
  82 };
  83
  84 static 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 *****************************************************************************/
  97 static 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
 119 static 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
 148 MACHINE_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
 157 MACHINE_END