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 /* sysctl */
  51 int bcmring_arch_warm_reboot;   /* do a warm reboot on hard reset */
  52
  53 static struct ctl_table_header *bcmring_sysctl_header;
  54
  55 static struct ctl_table bcmring_sysctl_warm_reboot[] = {
  56         {
  57          .procname = "warm",
  58          .data = &bcmring_arch_warm_reboot,
  59          .maxlen = sizeof(int),
  60          .mode = 0644,
  61          .proc_handler = proc_dointvec},
  62         {}
  63 };
  64
  65 static struct ctl_table bcmring_sysctl_reboot[] = {
  66         {
  67          .procname = "reboot",
  68          .mode = 0555,
  69          .child = bcmring_sysctl_warm_reboot},
  70         {}
  71 };
  72
  73 static struct resource nand_resource[] = {
  74         [0] = {
  75                 .start = MM_ADDR_IO_NAND,
  76                 .end = MM_ADDR_IO_NAND + 0x1000 - 1,
  77                 .flags = IORESOURCE_MEM,
  78         },
  79 };
  80
  81 static struct platform_device nand_device = {
  82         .name = "bcm-nand",
  83         .id = -1,
  84         .resource = nand_resource,
  85         .num_resources  = ARRAY_SIZE(nand_resource),
  86 };
  87
  88 static struct platform_device *devices[] __initdata = {
  89         &nand_device,
  90 };
  91
  92 /****************************************************************************
  93 *
  94 *   Called from the customize_machine function in arch/arm/kernel/setup.c
  95 *
  96 *   The customize_machine function is tagged as an arch_initcall
  97 *   (see include/linux/init.h for the order that the various init sections
  98 *   are called in.
  99 *
 100 *****************************************************************************/
 101 static void __init bcmring_init_machine(void)
 102 {
 103
 104         bcmring_sysctl_header = register_sysctl_table(bcmring_sysctl_reboot);
 105
 106         /* Enable spread spectrum */
 107         chipcHw_enableSpreadSpectrum();
 108
 109         platform_add_devices(devices, ARRAY_SIZE(devices));
 110
 111         bcmring_amba_init();
 112
 113         dma_init();
 114 }
 115
 116 /****************************************************************************
 117 *
 118 *   Called from setup_arch (in arch/arm/kernel/setup.c) to fixup any tags
 119 *   passed in by the boot loader.
 120 *
 121 *****************************************************************************/
 122
 123 static void __init bcmring_fixup(struct machine_desc *desc,
 124      struct tag *t, char **cmdline, struct meminfo *mi) {
 125 #ifdef CONFIG_BLK_DEV_INITRD
 126         printk(KERN_NOTICE "bcmring_fixup\n");
 127         t->hdr.tag = ATAG_CORE;
 128         t->hdr.size = tag_size(tag_core);
 129         t->u.core.flags = 0;
 130         t->u.core.pagesize = PAGE_SIZE;
 131         t->u.core.rootdev = 31 << 8 | 0;
 132         t = tag_next(t);
 133
 134         t->hdr.tag = ATAG_MEM;
 135         t->hdr.size = tag_size(tag_mem32);
 136         t->u.mem.start = CFG_GLOBAL_RAM_BASE;
 137         t->u.mem.size = CFG_GLOBAL_RAM_SIZE;
 138
 139         t = tag_next(t);
 140
 141         t->hdr.tag = ATAG_NONE;
 142         t->hdr.size = 0;
 143 #endif
 144 }
 145
 146 /****************************************************************************
 147 *
 148 *   Machine Description
 149 *
 150 *****************************************************************************/
 151
 152 MACHINE_START(BCMRING, "BCMRING")
 153         /* Maintainer: Broadcom Corporation */
 154         .phys_io = MM_IO_START,
 155         .io_pg_offst = (MM_IO_BASE >> 18) & 0xfffc,
 156         .fixup = bcmring_fixup,
 157         .map_io = bcmring_map_io,
 158         .init_irq = bcmring_init_irq,
 159         .timer = &bcmring_timer,
 160         .init_machine = bcmring_init_machine
 161 MACHINE_END