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 #include <asm/pmu.h>
33
34 #include <asm/mach/arch.h>
35 #include <mach/dma.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>
40
41 #include <cfg_global.h>
42
43 #include "core.h"
44
45 HW_DECLARE_SPINLOCK(arch)
46 HW_DECLARE_SPINLOCK(gpio)
47 #if defined(CONFIG_DEBUG_SPINLOCK)
48 EXPORT_SYMBOL(bcmring_gpio_reg_lock);
49 #endif
50
51 /* sysctl */
52 static int bcmring_arch_warm_reboot; /* do a warm reboot on hard reset */
53
bcmring_restart(char mode,const char * cmd)54 static void bcmring_restart(char mode, const char *cmd)
55 {
56 printk("arch_reset:%c %x\n", mode, bcmring_arch_warm_reboot);
57
58 if (mode == 'h') {
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);
64 } else {
65 /* Force reset of everything */
66 printk("force reset\n");
67 chipcHw_reset(chipcHw_REG_SOFT_RESET_CHIP_SOFT);
68 }
69 } else {
70 /* Force reset of everything */
71 printk("force reset\n");
72 chipcHw_reset(chipcHw_REG_SOFT_RESET_CHIP_SOFT);
73 }
74 }
75
76 static struct ctl_table_header *bcmring_sysctl_header;
77
78 static struct ctl_table bcmring_sysctl_warm_reboot[] = {
79 {
80 .procname = "warm",
81 .data = &bcmring_arch_warm_reboot,
82 .maxlen = sizeof(int),
83 .mode = 0644,
84 .proc_handler = proc_dointvec},
85 {}
86 };
87
88 static struct ctl_table bcmring_sysctl_reboot[] = {
89 {
90 .procname = "reboot",
91 .mode = 0555,
92 .child = bcmring_sysctl_warm_reboot},
93 {}
94 };
95
96 static struct resource nand_resource[] = {
97 [0] = {
98 .start = MM_ADDR_IO_NAND,
99 .end = MM_ADDR_IO_NAND + 0x1000 - 1,
100 .flags = IORESOURCE_MEM,
101 },
102 };
103
104 static struct platform_device nand_device = {
105 .name = "bcm-nand",
106 .id = -1,
107 .resource = nand_resource,
108 .num_resources = ARRAY_SIZE(nand_resource),
109 };
110
111 static struct resource pmu_resource = {
112 .start = IRQ_PMUIRQ,
113 .end = IRQ_PMUIRQ,
114 .flags = IORESOURCE_IRQ,
115 };
116
117 static struct platform_device pmu_device = {
118 .name = "arm-pmu",
119 .id = ARM_PMU_DEVICE_CPU,
120 .resource = &pmu_resource,
121 .num_resources = 1,
122 };
123
124
125 static struct platform_device *devices[] __initdata = {
126 &nand_device,
127 &pmu_device,
128 };
129
130 /****************************************************************************
131 *
132 * Called from the customize_machine function in arch/arm/kernel/setup.c
133 *
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
136 * are called in.
137 *
138 *****************************************************************************/
bcmring_init_machine(void)139 static void __init bcmring_init_machine(void)
140 {
141
142 bcmring_sysctl_header = register_sysctl_table(bcmring_sysctl_reboot);
143
144 /* Enable spread spectrum */
145 chipcHw_enableSpreadSpectrum();
146
147 platform_add_devices(devices, ARRAY_SIZE(devices));
148
149 bcmring_amba_init();
150
151 dma_init();
152 }
153
154 /****************************************************************************
155 *
156 * Called from setup_arch (in arch/arm/kernel/setup.c) to fixup any tags
157 * passed in by the boot loader.
158 *
159 *****************************************************************************/
160
bcmring_fixup(struct tag * t,char ** cmdline,struct meminfo * mi)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);
167 t->u.core.flags = 0;
168 t->u.core.pagesize = PAGE_SIZE;
169 t->u.core.rootdev = 31 << 8 | 0;
170 t = tag_next(t);
171
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;
176
177 t = tag_next(t);
178
179 t->hdr.tag = ATAG_NONE;
180 t->hdr.size = 0;
181 #endif
182 }
183
184 /****************************************************************************
185 *
186 * Machine Description
187 *
188 *****************************************************************************/
189
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,
199 MACHINE_END
200