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
192
193
194
195
196
197
198
199
200
201
202
|
/*
* 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/init.h>
#include <linux/interrupt.h>
#include <linux/irq.h>
#include <linux/irqchip.h>
#include <linux/irqchip/arm-gic.h>
#include <linux/mfd/dbx500-prcmu.h>
#include <linux/platform_data/arm-ux500-pm.h>
#include <linux/platform_device.h>
#include <linux/io.h>
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/of_platform.h>
#include <linux/perf/arm_pmu.h>
#include <linux/regulator/machine.h>
#include <asm/outercache.h>
#include <asm/hardware/cache-l2x0.h>
#include <asm/mach/map.h>
#include <asm/mach/arch.h>
#include "setup.h"
#include "board-mop500.h"
#include "db8500-regs.h"
static int __init ux500_l2x0_unlock(void)
{
int i;
struct device_node *np;
void __iomem *l2x0_base;
np = of_find_compatible_node(NULL, NULL, "arm,pl310-cache");
l2x0_base = of_iomap(np, 0);
of_node_put(np);
if (!l2x0_base)
return -ENODEV;
/*
* Unlock Data and Instruction Lock if locked. Ux500 U-Boot versions
* apparently locks both caches before jumping to the kernel. The
* l2x0 core will not touch the unlock registers if the l2x0 is
* already enabled, so we do it right here instead. The PL310 has
* 8 sets of registers, one per possible CPU.
*/
for (i = 0; i < 8; i++) {
writel_relaxed(0x0, l2x0_base + L2X0_LOCKDOWN_WAY_D_BASE +
i * L2X0_LOCKDOWN_STRIDE);
writel_relaxed(0x0, l2x0_base + L2X0_LOCKDOWN_WAY_I_BASE +
i * L2X0_LOCKDOWN_STRIDE);
}
iounmap(l2x0_base);
return 0;
}
static void ux500_l2c310_write_sec(unsigned long val, unsigned reg)
{
/*
* We can't write to secure registers as we are in non-secure
* mode, until we have some SMI service available.
*/
}
/*
* FIXME: Should we set up the GPIO domain here?
*
* The problem is that we cannot put the interrupt resources into the platform
* device until the irqdomain has been added. Right now, we set the GIC interrupt
* domain from init_irq(), then load the gpio driver from
* core_initcall(nmk_gpio_init) and add the platform devices from
* arch_initcall(customize_machine).
*
* This feels fragile because it depends on the gpio device getting probed
* _before_ any device uses the gpio interrupts.
*/
static void __init ux500_init_irq(void)
{
struct device_node *np;
struct resource r;
irqchip_init();
np = of_find_compatible_node(NULL, NULL, "stericsson,db8500-prcmu");
of_address_to_resource(np, 0, &r);
of_node_put(np);
if (!r.start) {
pr_err("could not find PRCMU base resource\n");
return;
}
prcmu_early_init(r.start, r.end-r.start);
ux500_pm_init(r.start, r.end-r.start);
/* Unlock before init */
ux500_l2x0_unlock();
outer_cache.write_sec = ux500_l2c310_write_sec;
}
static void ux500_restart(enum reboot_mode mode, const char *cmd)
{
local_irq_disable();
local_fiq_disable();
prcmu_system_reset(0);
}
/*
* 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 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", NULL),
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", NULL),
{},
};
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)
{
/* 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, NULL);
else
of_platform_populate(NULL, u8500_local_bus_nodes,
u8500_auxdata_lookup, NULL);
}
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)")
.l2c_aux_val = 0,
.l2c_aux_mask = ~0,
.init_irq = ux500_init_irq,
.init_machine = u8500_init_machine,
.dt_compat = stericsson_dt_platform_compat,
.restart = ux500_restart,
MACHINE_END
|
