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
|
/*
* arch/arm/mach-vt8500/vt8500.c
*
* Copyright (C) 2012 Tony Prisk <linux@prisktech.co.nz>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <linux/io.h>
#include <linux/pm.h>
#include <linux/reboot.h>
#include <asm/mach-types.h>
#include <asm/mach/arch.h>
#include <asm/mach/time.h>
#include <asm/mach/map.h>
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/of_irq.h>
#include <linux/of_platform.h>
#define LEGACY_GPIO_BASE 0xD8110000
#define LEGACY_PMC_BASE 0xD8130000
/* Registers in GPIO Controller */
#define VT8500_GPIO_MUX_REG 0x200
/* Registers in Power Management Controller */
#define VT8500_HCR_REG 0x12
#define VT8500_PMSR_REG 0x60
static void __iomem *pmc_base;
static void vt8500_restart(enum reboot_mode mode, const char *cmd)
{
if (pmc_base)
writel(1, pmc_base + VT8500_PMSR_REG);
}
static struct map_desc vt8500_io_desc[] __initdata = {
/* SoC MMIO registers */
[0] = {
.virtual = 0xf8000000,
.pfn = __phys_to_pfn(0xd8000000),
.length = 0x00390000, /* max of all chip variants */
.type = MT_DEVICE
},
};
static void __init vt8500_map_io(void)
{
iotable_init(vt8500_io_desc, ARRAY_SIZE(vt8500_io_desc));
}
static void vt8500_power_off(void)
{
local_irq_disable();
writew(5, pmc_base + VT8500_HCR_REG);
asm("mcr p15, 0, %0, c7, c0, 4" : : "r" (0));
}
static void __init vt8500_init(void)
{
struct device_node *np;
#if defined(CONFIG_FB_VT8500) || defined(CONFIG_FB_WM8505)
struct device_node *fb;
void __iomem *gpio_base;
#endif
#ifdef CONFIG_FB_VT8500
fb = of_find_compatible_node(NULL, NULL, "via,vt8500-fb");
if (fb) {
np = of_find_compatible_node(NULL, NULL, "via,vt8500-gpio");
if (np) {
gpio_base = of_iomap(np, 0);
if (!gpio_base)
pr_err("%s: of_iomap(gpio_mux) failed\n",
__func__);
of_node_put(np);
} else {
gpio_base = ioremap(LEGACY_GPIO_BASE, 0x1000);
if (!gpio_base)
pr_err("%s: ioremap(legacy_gpio_mux) failed\n",
__func__);
}
if (gpio_base) {
writel(readl(gpio_base + VT8500_GPIO_MUX_REG) | 1,
gpio_base + VT8500_GPIO_MUX_REG);
iounmap(gpio_base);
} else
pr_err("%s: Could not remap GPIO mux\n", __func__);
of_node_put(fb);
}
#endif
#ifdef CONFIG_FB_WM8505
fb = of_find_compatible_node(NULL, NULL, "wm,wm8505-fb");
if (fb) {
np = of_find_compatible_node(NULL, NULL, "wm,wm8505-gpio");
if (!np)
np = of_find_compatible_node(NULL, NULL,
"wm,wm8650-gpio");
if (np) {
gpio_base = of_iomap(np, 0);
if (!gpio_base)
pr_err("%s: of_iomap(gpio_mux) failed\n",
__func__);
of_node_put(np);
} else {
gpio_base = ioremap(LEGACY_GPIO_BASE, 0x1000);
if (!gpio_base)
pr_err("%s: ioremap(legacy_gpio_mux) failed\n",
__func__);
}
if (gpio_base) {
writel(readl(gpio_base + VT8500_GPIO_MUX_REG) |
0x80000000, gpio_base + VT8500_GPIO_MUX_REG);
iounmap(gpio_base);
} else
pr_err("%s: Could not remap GPIO mux\n", __func__);
of_node_put(fb);
}
#endif
np = of_find_compatible_node(NULL, NULL, "via,vt8500-pmc");
if (np) {
pmc_base = of_iomap(np, 0);
if (!pmc_base)
pr_err("%s:of_iomap(pmc) failed\n", __func__);
of_node_put(np);
} else {
pmc_base = ioremap(LEGACY_PMC_BASE, 0x1000);
if (!pmc_base)
pr_err("%s:ioremap(power_off) failed\n", __func__);
}
if (pmc_base)
pm_power_off = &vt8500_power_off;
else
pr_err("%s: PMC Hibernation register could not be remapped, not enabling power off!\n", __func__);
of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
}
static const char * const vt8500_dt_compat[] = {
"via,vt8500",
"wm,wm8650",
"wm,wm8505",
"wm,wm8750",
"wm,wm8850",
NULL
};
DT_MACHINE_START(WMT_DT, "VIA/Wondermedia SoC (Device Tree Support)")
.dt_compat = vt8500_dt_compat,
.map_io = vt8500_map_io,
.init_machine = vt8500_init,
.restart = vt8500_restart,
MACHINE_END
|
