summaryrefslogtreecommitdiff
path: root/arch/arm/mach-ux500/cpu-db8500.c
blob: 391d329a7e88cf7aa55f39ff668477997baeb30d (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
/*
 * Copyright (C) 2008-2009 ST-Ericsson SA
 *
 * Author: Srinidhi KASAGAR <srinidhi.kasagar@stericsson.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2, as
 * published by the Free Software Foundation.
 *
 */
#include <linux/types.h>
#include <linux/init.h>
#include <linux/device.h>
#include <linux/amba/bus.h>
#include <linux/interrupt.h>
#include <linux/irq.h>
#include <linux/platform_device.h>
#include <linux/io.h>
#include <linux/mfd/abx500/ab8500.h>
#include <linux/mfd/dbx500-prcmu.h>
#include <linux/of.h>
#include <linux/of_platform.h>
#include <linux/regulator/machine.h>
#include <linux/random.h>

#include <asm/pmu.h>
#include <asm/mach/map.h>

#include "setup.h"

#include "board-mop500-regulators.h"
#include "board-mop500.h"
#include "db8500-regs.h"
#include "id.h"

static struct ab8500_platform_data ab8500_platdata = {
	.regulator	= &ab8500_regulator_plat_data,
};

static struct prcmu_pdata db8500_prcmu_pdata = {
	.ab_platdata	= &ab8500_platdata,
	.version_offset	= DB8500_PRCMU_FW_VERSION_OFFSET,
	.legacy_offset	= DB8500_PRCMU_LEGACY_OFFSET,
};

/*  U8500 and U9540 common io_desc */
static struct map_desc u8500_common_io_desc[] __initdata = {
	/* SCU base also covers GIC CPU BASE and TWD with its 4K page */
	__IO_DEV_DESC(U8500_SCU_BASE, SZ_4K),
	__IO_DEV_DESC(U8500_GIC_DIST_BASE, SZ_4K),
	__IO_DEV_DESC(U8500_L2CC_BASE, SZ_4K),
	__IO_DEV_DESC(U8500_BACKUPRAM0_BASE, SZ_8K),
};

/* U8500 IO map specific description */
static struct map_desc u8500_io_desc[] __initdata = {
	__IO_DEV_DESC(U8500_PRCMU_BASE, SZ_4K),
	__IO_DEV_DESC(U8500_PRCMU_TCDM_BASE, SZ_4K),

};

/* U9540 IO map specific description */
static struct map_desc u9540_io_desc[] __initdata = {
	__IO_DEV_DESC(U8500_PRCMU_BASE, SZ_4K + SZ_8K),
	__IO_DEV_DESC(U8500_PRCMU_TCDM_BASE, SZ_4K + SZ_8K),
};

static void __init u8500_map_io(void)
{
	debug_ll_io_init();
	ux500_map_io();

	iotable_init(u8500_common_io_desc, ARRAY_SIZE(u8500_common_io_desc));

	if (cpu_is_ux540_family())
		iotable_init(u9540_io_desc, ARRAY_SIZE(u9540_io_desc));
	else
		iotable_init(u8500_io_desc, ARRAY_SIZE(u8500_io_desc));
}

/*
 * The PMU IRQ lines of two cores are wired together into a single interrupt.
 * Bounce the interrupt to the other core if it's not ours.
 */
static irqreturn_t db8500_pmu_handler(int irq, void *dev, irq_handler_t handler)
{
	irqreturn_t ret = handler(irq, dev);
	int other = !smp_processor_id();

	if (ret == IRQ_NONE && cpu_online(other))
		irq_set_affinity(irq, cpumask_of(other));

	/*
	 * We should be able to get away with the amount of IRQ_NONEs we give,
	 * while still having the spurious IRQ detection code kick in if the
	 * interrupt really starts hitting spuriously.
	 */
	return ret;
}

static struct arm_pmu_platdata db8500_pmu_platdata = {
	.handle_irq		= db8500_pmu_handler,
};

static const char *db8500_read_soc_id(void)
{
	void __iomem *uid = __io_address(U8500_BB_UID_BASE);

	/* Throw these device-specific numbers into the entropy pool */
	add_device_randomness(uid, 0x14);
	return kasprintf(GFP_KERNEL, "%08x%08x%08x%08x%08x",
			 readl((u32 *)uid+0),
			 readl((u32 *)uid+1), readl((u32 *)uid+2),
			 readl((u32 *)uid+3), readl((u32 *)uid+4));
}

static struct device * __init db8500_soc_device_init(void)
{
	const char *soc_id = db8500_read_soc_id();

	return ux500_soc_device_init(soc_id);
}

static struct of_dev_auxdata u8500_auxdata_lookup[] __initdata = {
	/* Requires call-back bindings. */
	OF_DEV_AUXDATA("arm,cortex-a9-pmu", 0, "arm-pmu", &db8500_pmu_platdata),
	/* Requires DMA bindings. */
	OF_DEV_AUXDATA("stericsson,ux500-msp-i2s", 0x80123000,
		       "ux500-msp-i2s.0", &msp0_platform_data),
	OF_DEV_AUXDATA("stericsson,ux500-msp-i2s", 0x80124000,
		       "ux500-msp-i2s.1", &msp1_platform_data),
	OF_DEV_AUXDATA("stericsson,ux500-msp-i2s", 0x80117000,
		       "ux500-msp-i2s.2", &msp2_platform_data),
	OF_DEV_AUXDATA("stericsson,ux500-msp-i2s", 0x80125000,
		       "ux500-msp-i2s.3", &msp3_platform_data),
	/* Requires non-DT:able platform data. */
	OF_DEV_AUXDATA("stericsson,db8500-prcmu", 0x80157000, "db8500-prcmu",
			&db8500_prcmu_pdata),
	OF_DEV_AUXDATA("stericsson,ux500-cryp", 0xa03cb000, "cryp1", NULL),
	OF_DEV_AUXDATA("stericsson,ux500-hash", 0xa03c2000, "hash1", NULL),
	OF_DEV_AUXDATA("stericsson,snd-soc-mop500", 0, "snd-soc-mop500.0",
			NULL),
	{},
};

static struct of_dev_auxdata u8540_auxdata_lookup[] __initdata = {
	OF_DEV_AUXDATA("stericsson,db8500-prcmu", 0x80157000, "db8500-prcmu",
			&db8500_prcmu_pdata),
	{},
};

static const struct of_device_id u8500_local_bus_nodes[] = {
	/* only create devices below soc node */
	{ .compatible = "stericsson,db8500", },
	{ .compatible = "stericsson,db8500-prcmu", },
	{ .compatible = "simple-bus"},
	{ },
};

static void __init u8500_init_machine(void)
{
	struct device *parent = db8500_soc_device_init();

	/* automatically probe child nodes of dbx5x0 devices */
	if (of_machine_is_compatible("st-ericsson,u8540"))
		of_platform_populate(NULL, u8500_local_bus_nodes,
				     u8540_auxdata_lookup, parent);
	else
		of_platform_populate(NULL, u8500_local_bus_nodes,
				     u8500_auxdata_lookup, parent);
}

static const char * stericsson_dt_platform_compat[] = {
	"st-ericsson,u8500",
	"st-ericsson,u8540",
	"st-ericsson,u9500",
	"st-ericsson,u9540",
	NULL,
};

DT_MACHINE_START(U8500_DT, "ST-Ericsson Ux5x0 platform (Device Tree Support)")
	.smp            = smp_ops(ux500_smp_ops),
	.map_io		= u8500_map_io,
	.init_irq	= ux500_init_irq,
	/* we re-use nomadik timer here */
	.init_time	= ux500_timer_init,
	.init_machine	= u8500_init_machine,
	.init_late	= NULL,
	.dt_compat      = stericsson_dt_platform_compat,
	.restart        = ux500_restart,
MACHINE_END