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 #include <asm/pmu.h>
  33
  34 #include <asm/mach/arch.h>
  35 #include <mach/dma.h>
  36 #include <mach/hardware.h>
  37 #include <mach/csp/mm_io.h>
  38 #include <mach/csp/chipcHw_def.h>
  39 #include <mach/csp/chipcHw_inline.h>
  40
  41 #include <cfg_global.h>
  42
  43 #include "core.h"
  44
  45 HW_DECLARE_SPINLOCK(arch)
  46 HW_DECLARE_SPINLOCK(gpio)
  47 #if defined(CONFIG_DEBUG_SPINLOCK)
  48     EXPORT_SYMBOL(bcmring_gpio_reg_lock);
  49 #endif
  50
  51 /* sysctl */
  52 int bcmring_arch_warm_reboot;   /* do a warm reboot on hard reset */
  53
  54 static struct ctl_table_header *bcmring_sysctl_header;
  55
  56 static struct ctl_table bcmring_sysctl_warm_reboot[] = {
  57         {
  58          .procname = "warm",
  59          .data = &bcmring_arch_warm_reboot,
  60          .maxlen = sizeof(int),
  61          .mode = 0644,
  62          .proc_handler = proc_dointvec},
  63         {}
  64 };
  65
  66 static struct ctl_table bcmring_sysctl_reboot[] = {
  67         {
  68          .procname = "reboot",
  69          .mode = 0555,
  70          .child = bcmring_sysctl_warm_reboot},
  71         {}
  72 };
  73
  74 static struct resource nand_resource[] = {
  75         [0] = {
  76                 .start = MM_ADDR_IO_NAND,
  77                 .end = MM_ADDR_IO_NAND + 0x1000 - 1,
  78                 .flags = IORESOURCE_MEM,
  79         },
  80 };
  81
  82 static struct platform_device nand_device = {
  83         .name = "bcm-nand",
  84         .id = -1,
  85         .resource = nand_resource,
  86         .num_resources  = ARRAY_SIZE(nand_resource),
  87 };
  88
  89 static struct resource pmu_resource = {
  90         .start  = IRQ_PMUIRQ,
  91         .end    = IRQ_PMUIRQ,
  92         .flags  = IORESOURCE_IRQ,
  93 };
  94
  95 static struct platform_device pmu_device = {
  96         .name           = "arm-pmu",
  97         .id             = ARM_PMU_DEVICE_CPU,
  98         .resource       = &pmu_resource,
  99         .num_resources  = 1,
 100 };
 101
 102
 103 static struct platform_device *devices[] __initdata = {
 104         &nand_device,
 105         &pmu_device,
 106 };
 107
 108 /****************************************************************************
 109 *
 110 *   Called from the customize_machine function in arch/arm/kernel/setup.c
 111 *
 112 *   The customize_machine function is tagged as an arch_initcall
 113 *   (see include/linux/init.h for the order that the various init sections
 114 *   are called in.
 115 *
 116 *****************************************************************************/
 117 static void __init bcmring_init_machine(void)
 118 {
 119
 120         bcmring_sysctl_header = register_sysctl_table(bcmring_sysctl_reboot);
 121
 122         /* Enable spread spectrum */
 123         chipcHw_enableSpreadSpectrum();
 124
 125         platform_add_devices(devices, ARRAY_SIZE(devices));
 126
 127         bcmring_amba_init();
 128
 129         dma_init();
 130 }
 131
 132 /****************************************************************************
 133 *
 134 *   Called from setup_arch (in arch/arm/kernel/setup.c) to fixup any tags
 135 *   passed in by the boot loader.
 136 *
 137 *****************************************************************************/
 138
 139 static void __init bcmring_fixup(struct tag *t, char **cmdline,
 140         struct meminfo *mi) {
 141 #ifdef CONFIG_BLK_DEV_INITRD
 142         printk(KERN_NOTICE "bcmring_fixup\n");
 143         t->hdr.tag = ATAG_CORE;
 144         t->hdr.size = tag_size(tag_core);
 145         t->u.core.flags = 0;
 146         t->u.core.pagesize = PAGE_SIZE;
 147         t->u.core.rootdev = 31 << 8 | 0;
 148         t = tag_next(t);
 149
 150         t->hdr.tag = ATAG_MEM;
 151         t->hdr.size = tag_size(tag_mem32);
 152         t->u.mem.start = CFG_GLOBAL_RAM_BASE;
 153         t->u.mem.size = CFG_GLOBAL_RAM_SIZE;
 154
 155         t = tag_next(t);
 156
 157         t->hdr.tag = ATAG_NONE;
 158         t->hdr.size = 0;
 159 #endif
 160 }
 161
 162 /****************************************************************************
 163 *
 164 *   Machine Description
 165 *
 166 *****************************************************************************/
 167
 168 MACHINE_START(BCMRING, "BCMRING")
 169         /* Maintainer: Broadcom Corporation */
 170         .fixup = bcmring_fixup,
 171         .map_io = bcmring_map_io,
 172         .init_early = bcmring_init_early,
 173         .init_irq = bcmring_init_irq,
 174         .timer = &bcmring_timer,
 175         .init_machine = bcmring_init_machine
 176 MACHINE_END