1 /*****************************************************************************
2 * Copyright 2003 - 2008 Broadcom Corporation. All rights reserved.
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").
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
13 *****************************************************************************/
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>
25 #include <linux/proc_fs.h>
26 #include <linux/sysctl.h>
29 #include <asm/setup.h>
30 #include <asm/mach-types.h>
31 #include <asm/mach/time.h>
33 #include <asm/mach/arch.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>
40 #include <cfg_global.h>
44 HW_DECLARE_SPINLOCK(arch)
45 HW_DECLARE_SPINLOCK(gpio)
46 #if defined(CONFIG_DEBUG_SPINLOCK)
47 EXPORT_SYMBOL(bcmring_gpio_reg_lock);
51 static int bcmring_arch_warm_reboot; /* do a warm reboot on hard reset */
53 static void bcmring_restart(char mode, const char *cmd)
55 printk("arch_reset:%c %x\n", mode, bcmring_arch_warm_reboot);
58 /* Reboot configured in proc entry */
59 if (bcmring_arch_warm_reboot) {
60 printk("warm reset\n");
61 /* Issue Warm reset (do not reset ethernet switch, keep alive) */
62 chipcHw_reset(chipcHw_REG_SOFT_RESET_CHIP_WARM);
64 /* Force reset of everything */
65 printk("force reset\n");
66 chipcHw_reset(chipcHw_REG_SOFT_RESET_CHIP_SOFT);
69 /* Force reset of everything */
70 printk("force reset\n");
71 chipcHw_reset(chipcHw_REG_SOFT_RESET_CHIP_SOFT);
75 static struct ctl_table_header *bcmring_sysctl_header;
77 static struct ctl_table bcmring_sysctl_warm_reboot[] = {
80 .data = &bcmring_arch_warm_reboot,
81 .maxlen = sizeof(int),
83 .proc_handler = proc_dointvec},
87 static struct ctl_table bcmring_sysctl_reboot[] = {
91 .child = bcmring_sysctl_warm_reboot},
95 static struct resource nand_resource[] = {
97 .start = MM_ADDR_IO_NAND,
98 .end = MM_ADDR_IO_NAND + 0x1000 - 1,
99 .flags = IORESOURCE_MEM,
103 static struct platform_device nand_device = {
106 .resource = nand_resource,
107 .num_resources = ARRAY_SIZE(nand_resource),
110 static struct resource pmu_resource = {
113 .flags = IORESOURCE_IRQ,
116 static struct platform_device pmu_device = {
119 .resource = &pmu_resource,
124 static struct platform_device *devices[] __initdata = {
129 /****************************************************************************
131 * Called from the customize_machine function in arch/arm/kernel/setup.c
133 * The customize_machine function is tagged as an arch_initcall
134 * (see include/linux/init.h for the order that the various init sections
137 *****************************************************************************/
138 static void __init bcmring_init_machine(void)
141 bcmring_sysctl_header = register_sysctl_table(bcmring_sysctl_reboot);
143 /* Enable spread spectrum */
144 chipcHw_enableSpreadSpectrum();
146 platform_add_devices(devices, ARRAY_SIZE(devices));
153 /****************************************************************************
155 * Called from setup_arch (in arch/arm/kernel/setup.c) to fixup any tags
156 * passed in by the boot loader.
158 *****************************************************************************/
160 static void __init bcmring_fixup(struct tag *t, char **cmdline,
161 struct meminfo *mi) {
162 #ifdef CONFIG_BLK_DEV_INITRD
163 printk(KERN_NOTICE "bcmring_fixup\n");
164 t->hdr.tag = ATAG_CORE;
165 t->hdr.size = tag_size(tag_core);
167 t->u.core.pagesize = PAGE_SIZE;
168 t->u.core.rootdev = 31 << 8 | 0;
171 t->hdr.tag = ATAG_MEM;
172 t->hdr.size = tag_size(tag_mem32);
173 t->u.mem.start = CFG_GLOBAL_RAM_BASE;
174 t->u.mem.size = CFG_GLOBAL_RAM_SIZE;
178 t->hdr.tag = ATAG_NONE;
183 /****************************************************************************
185 * Machine Description
187 *****************************************************************************/
189 MACHINE_START(BCMRING, "BCMRING")
190 /* Maintainer: Broadcom Corporation */
191 .fixup = bcmring_fixup,
192 .map_io = bcmring_map_io,
193 .init_early = bcmring_init_early,
194 .init_irq = bcmring_init_irq,
195 .timer = &bcmring_timer,
196 .init_machine = bcmring_init_machine,
197 .restart = bcmring_restart,