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 <mach/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
,