Merge branch 'timers-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git...
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / 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