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>
34 #include <asm/mach/arch.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>
41 #include <cfg_global.h>
45 HW_DECLARE_SPINLOCK(arch
)
46 HW_DECLARE_SPINLOCK(gpio
)
47 #if defined(CONFIG_DEBUG_SPINLOCK)
48 EXPORT_SYMBOL(bcmring_gpio_reg_lock
);
52 static int bcmring_arch_warm_reboot
; /* do a warm reboot on hard reset */
54 static void bcmring_restart(char mode
, const char *cmd
)
56 printk("arch_reset:%c %x\n", mode
, bcmring_arch_warm_reboot
);
59 /* Reboot configured in proc entry */
60 if (bcmring_arch_warm_reboot
) {
61 printk("warm reset\n");
62 /* Issue Warm reset (do not reset ethernet switch, keep alive) */
63 chipcHw_reset(chipcHw_REG_SOFT_RESET_CHIP_WARM
);
65 /* Force reset of everything */
66 printk("force reset\n");
67 chipcHw_reset(chipcHw_REG_SOFT_RESET_CHIP_SOFT
);
70 /* Force reset of everything */
71 printk("force reset\n");
72 chipcHw_reset(chipcHw_REG_SOFT_RESET_CHIP_SOFT
);
76 static struct ctl_table_header
*bcmring_sysctl_header
;
78 static struct ctl_table bcmring_sysctl_warm_reboot
[] = {
81 .data
= &bcmring_arch_warm_reboot
,
82 .maxlen
= sizeof(int),
84 .proc_handler
= proc_dointvec
},
88 static struct ctl_table bcmring_sysctl_reboot
[] = {
92 .child
= bcmring_sysctl_warm_reboot
},
96 static struct resource nand_resource
[] = {
98 .start
= MM_ADDR_IO_NAND
,
99 .end
= MM_ADDR_IO_NAND
+ 0x1000 - 1,
100 .flags
= IORESOURCE_MEM
,
104 static struct platform_device nand_device
= {
107 .resource
= nand_resource
,
108 .num_resources
= ARRAY_SIZE(nand_resource
),
111 static struct resource pmu_resource
= {
114 .flags
= IORESOURCE_IRQ
,
117 static struct platform_device pmu_device
= {
119 .id
= ARM_PMU_DEVICE_CPU
,
120 .resource
= &pmu_resource
,
125 static struct platform_device
*devices
[] __initdata
= {
130 /****************************************************************************
132 * Called from the customize_machine function in arch/arm/kernel/setup.c
134 * The customize_machine function is tagged as an arch_initcall
135 * (see include/linux/init.h for the order that the various init sections
138 *****************************************************************************/
139 static void __init
bcmring_init_machine(void)
142 bcmring_sysctl_header
= register_sysctl_table(bcmring_sysctl_reboot
);
144 /* Enable spread spectrum */
145 chipcHw_enableSpreadSpectrum();
147 platform_add_devices(devices
, ARRAY_SIZE(devices
));
154 /****************************************************************************
156 * Called from setup_arch (in arch/arm/kernel/setup.c) to fixup any tags
157 * passed in by the boot loader.
159 *****************************************************************************/
161 static void __init
bcmring_fixup(struct tag
*t
, char **cmdline
,
162 struct meminfo
*mi
) {
163 #ifdef CONFIG_BLK_DEV_INITRD
164 printk(KERN_NOTICE
"bcmring_fixup\n");
165 t
->hdr
.tag
= ATAG_CORE
;
166 t
->hdr
.size
= tag_size(tag_core
);
168 t
->u
.core
.pagesize
= PAGE_SIZE
;
169 t
->u
.core
.rootdev
= 31 << 8 | 0;
172 t
->hdr
.tag
= ATAG_MEM
;
173 t
->hdr
.size
= tag_size(tag_mem32
);
174 t
->u
.mem
.start
= CFG_GLOBAL_RAM_BASE
;
175 t
->u
.mem
.size
= CFG_GLOBAL_RAM_SIZE
;
179 t
->hdr
.tag
= ATAG_NONE
;
184 /****************************************************************************
186 * Machine Description
188 *****************************************************************************/
190 MACHINE_START(BCMRING
, "BCMRING")
191 /* Maintainer: Broadcom Corporation */
192 .fixup
= bcmring_fixup
,
193 .map_io
= bcmring_map_io
,
194 .init_early
= bcmring_init_early
,
195 .init_irq
= bcmring_init_irq
,
196 .timer
= &bcmring_timer
,
197 .init_machine
= bcmring_init_machine
,
198 .restart
= bcmring_restart
,