summaryrefslogtreecommitdiffstats
path: root/arch/arm/mach-bcmring/arch.c
blob: c18a5048b6c5e5974437932c7b78e83c4c28f25f (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
/*****************************************************************************
* Copyright 2003 - 2008 Broadcom Corporation.  All rights reserved.
*
* Unless you and Broadcom execute a separate written software license
* agreement governing use of this software, this software is licensed to you
* under the terms of the GNU General Public License version 2, available at
* http://www.broadcom.com/licenses/GPLv2.php (the "GPL").
*
* Notwithstanding the above, under no circumstances may you combine this
* software in any way with any other Broadcom software provided under a
* license other than the GPL, without Broadcom's express prior written
* consent.
*****************************************************************************/

#include <linux/kernel.h>
#include <linux/platform_device.h>
#include <linux/types.h>
#include <linux/sched.h>
#include <linux/interrupt.h>
#include <linux/init.h>
#include <linux/errno.h>
#include <linux/spinlock.h>
#include <linux/module.h>

#include <linux/proc_fs.h>
#include <linux/sysctl.h>

#include <asm/irq.h>
#include <asm/setup.h>
#include <asm/mach-types.h>
#include <asm/mach/time.h>

#include <asm/mach/arch.h>
#include <mach/dma.h>
#include <mach/hardware.h>
#include <mach/csp/mm_io.h>
#include <mach/csp/chipcHw_def.h>
#include <mach/csp/chipcHw_inline.h>

#include <mach/cfg_global.h>

#include "core.h"

HW_DECLARE_SPINLOCK(arch)
HW_DECLARE_SPINLOCK(gpio)
#if defined(CONFIG_DEBUG_SPINLOCK)
    EXPORT_SYMBOL(bcmring_gpio_reg_lock);
#endif

/* sysctl */
static int bcmring_arch_warm_reboot;	/* do a warm reboot on hard reset */

static void bcmring_restart(char mode, const char *cmd)
{
	printk("arch_reset:%c %x\n", mode, bcmring_arch_warm_reboot);

	if (mode == 'h') {
		/* Reboot configured in proc entry */
		if (bcmring_arch_warm_reboot) {
			printk("warm reset\n");
			/* Issue Warm reset (do not reset ethernet switch, keep alive) */
			chipcHw_reset(chipcHw_REG_SOFT_RESET_CHIP_WARM);
		} else {
			/* Force reset of everything */
			printk("force reset\n");
			chipcHw_reset(chipcHw_REG_SOFT_RESET_CHIP_SOFT);
		}
	} else {
		/* Force reset of everything */
		printk("force reset\n");
		chipcHw_reset(chipcHw_REG_SOFT_RESET_CHIP_SOFT);
	}
}

static struct ctl_table_header *bcmring_sysctl_header;

static struct ctl_table bcmring_sysctl_warm_reboot[] = {
	{
	 .procname = "warm",
	 .data = &bcmring_arch_warm_reboot,
	 .maxlen = sizeof(int),
	 .mode = 0644,
	 .proc_handler = proc_dointvec},
	{}
};

static struct ctl_table bcmring_sysctl_reboot[] = {
	{
	 .procname = "reboot",
	 .mode = 0555,
	 .child = bcmring_sysctl_warm_reboot},
	{}
};

static struct resource nand_resource[] = {
	[0] = {
		.start = MM_ADDR_IO_NAND,
		.end = MM_ADDR_IO_NAND + 0x1000 - 1,
		.flags = IORESOURCE_MEM,
	},
};

static struct platform_device nand_device = {
	.name = "bcm-nand",
	.id = -1,
	.resource = nand_resource,
	.num_resources	= ARRAY_SIZE(nand_resource),
};

static struct resource pmu_resource = {
	.start	= IRQ_PMUIRQ,
	.end	= IRQ_PMUIRQ,
	.flags	= IORESOURCE_IRQ,
};

static struct platform_device pmu_device = {
	.name		= "arm-pmu",
	.id		= -1,
	.resource	= &pmu_resource,
	.num_resources	= 1,
};


static struct platform_device *devices[] __initdata = {
	&nand_device,
	&pmu_device,
};

/****************************************************************************
*
*   Called from the customize_machine function in arch/arm/kernel/setup.c
*
*   The customize_machine function is tagged as an arch_initcall
*   (see include/linux/init.h for the order that the various init sections
*   are called in.
*
*****************************************************************************/
static void __init bcmring_init_machine(void)
{

	bcmring_sysctl_header = register_sysctl_table(bcmring_sysctl_reboot);

	/* Enable spread spectrum */
	chipcHw_enableSpreadSpectrum();

	platform_add_devices(devices, ARRAY_SIZE(devices));

	bcmring_amba_init();

	dma_init();
}

/****************************************************************************
*
*   Called from setup_arch (in arch/arm/kernel/setup.c) to fixup any tags
*   passed in by the boot loader.
*
*****************************************************************************/

static void __init bcmring_fixup(struct tag *t, char **cmdline,
	struct meminfo *mi) {
#ifdef CONFIG_BLK_DEV_INITRD
	printk(KERN_NOTICE "bcmring_fixup\n");
	t->hdr.tag = ATAG_CORE;
	t->hdr.size = tag_size(tag_core);
	t->u.core.flags = 0;
	t->u.core.pagesize = PAGE_SIZE;
	t->u.core.rootdev = 31 << 8 | 0;
	t = tag_next(t);

	t->hdr.tag = ATAG_MEM;
	t->hdr.size = tag_size(tag_mem32);
	t->u.mem.start = CFG_GLOBAL_RAM_BASE;
	t->u.mem.size = CFG_GLOBAL_RAM_SIZE;

	t = tag_next(t);

	t->hdr.tag = ATAG_NONE;
	t->hdr.size = 0;
#endif
}

/****************************************************************************
*
*   Machine Description
*
*****************************************************************************/

MACHINE_START(BCMRING, "BCMRING")
	/* Maintainer: Broadcom Corporation */
	.fixup = bcmring_fixup,
	.map_io = bcmring_map_io,
	.init_early = bcmring_init_early,
	.init_irq = bcmring_init_irq,
	.timer = &bcmring_timer,
	.init_machine = bcmring_init_machine,
	.restart = bcmring_restart,
MACHINE_END